JP2023099747A - Sign maintenance device of driving apparatus of packaging machine - Google Patents

Abstract

To acquire a change showing its sign to a driving apparatus used for a packaging machine before the occurrence of a malfunction due to a degradation or abnormality so as to achieve maintenance of the driving apparatus.SOLUTION: A sign maintenance device 4 of a driving apparatus of a packaging machine comprises: a driving energy change acquisition part 5 for acquiring a change of driving energy composed of a driving current or compressed air supplied to a driving apparatus 3 in a state where the driving apparatus 3 is operated normally with respect to the driving apparatus 3 of a packaging machine which is one of a servo motor, an air cylinder or a heat sealer; a sign determination part 6 for determining a sign of the occurrence of a malfunction to the driving apparatus 3 when the change of the driving energy acquired by the driving energy change acquisition part 5 exceeds a predetermined range; and a determination result output part 7 for outputting a determination result of the sign determination part 6.SELECTED DRAWING: Figure 1

Description

The present invention relates to a predictive maintenance device for driving devices such as servomotors, air cylinders, and heaters in packaging machines such as horizontal pillow packaging machines, vertical pillow packaging machines, overwrap packaging machines, and wrapping packaging machines.

2. Description of the Related Art In packaging machines such as horizontal pillow packaging machines, vertical pillow packaging machines, overwrap packaging machines, and wrapping packaging machines, various drive devices such as servo motors, air cylinders, and heaters for heat sealers are used.
These drive devices may fail due to various factors, and in such cases they will be repaired or replaced. Various diagnostic systems have been proposed for finding faults in
For example, Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2001-261145) discloses an article conveying apparatus having a conveyer driven by a motor, in which a current measuring means for measuring the magnitude of the current flowing through the motor; An article conveying apparatus comprising: notification determination means for outputting a notification signal when the magnitude of the current measured by the measuring means exceeds a reference value; and notification means for operating in response to the notification signal. disclosed.
Patent Document 2 (Japanese National Publication of International Patent Application No. 2005-528291) discloses a system for identifying abnormal operation of a packaging machine, in which a signal corresponding to a torque value of a servo motor issued to the servo motor during use is generated. a sampling entity arranged to sample; a spectral analyzer for producing a spectral analysis of said sampled signal; and a memory for storing characterizations corresponding to operating conditions of a mechanical element coupled to said servomotor. and a processing unit coupled to the apparatus, wherein the characterization corresponds to at least one predetermined value for at least one respective frequency of the signal, the processing unit operable to generate the sampled A system is disclosed that is arranged to determine abnormal operation of the mechanical element during use using the spectral analysis of the signal and the characterization of the mechanical element.
Patent Document 3 (Japanese Unexamined Patent Application Publication No. 2012-1211) discloses an automatic packaging machine that uses an air cylinder as a drive source for opening and closing the sealer. From the signal output and the opening signal output, the sealer closing operation time and the sealer opening operation time are calculated and displayed so that they can be monitored. If the sealer close signal output is output, and if the reed switch is lost during the period from when the reed switch confirms that the sealer is closed to when the open signal output is output An automatic packaging machine with an alarm stop function is disclosed.

However, the conveying apparatus of Patent Document 1 outputs a notification signal when a load to the extent that the conveyer cannot run smoothly occurs, the torque of the motor increases, and the magnitude of the current flowing through the motor exceeds a reference value. In the conveying device of Patent Document 1, when the operation of the motor changes due to wear of the gear head, lack of oil in the bearing, etc., in a geared motor that controls the position, speed, etc., such as a servo motor with a speed reducer. For example, it is not possible to detect a slight malfunction such that the magnitude of the current flowing through the motor does not deviate from the reference value, and to prevent the malfunction before it occurs.
In addition, the packaging system of Patent Document 2 analyzes the spectral signal corresponding to the torque value of the servomotor to monitor the operating conditions of machine elements coupled to the servomotor, such as wear of chains, belts, bearings, and the like. Since it determines the abnormal operation of the machine element, as in Patent Document 1, in a geared motor such as a servomotor with a speed reducer, when the operation of the motor changes due to wear of the gear head, lack of oil in the bearing, etc. In addition, it is impossible to detect a slight malfunction of the servomotor that cannot be determined as an abnormal operation from the analysis of the spectrum signal corresponding to the torque value of the servomotor, and to prevent the abnormality from occurring.
Furthermore, in the automatic packaging machine of Patent Document 3, when the sealer closing operation time or the sealer opening operation time exceeds the allowable time, a warning stop is performed. Even if an air leak occurs, a warning stop is not issued, and a change such as a slight air leak from the air cylinder cannot be detected and maintenance performed before an abnormality occurs.

In this respect, Patent Document 4 (Japanese Patent Application Laid-Open No. 2017-167815) discloses a device management system for managing a plurality of production line configuration devices that constitute a production line for producing products, wherein the production line configuration devices are: A weighing device for weighing the product, a packaging device for packaging the product, and/or a boxing device for boxing the packaged product, and accumulating part information on parts included in the production line configuration device. an information accumulating unit that analyzes the parts information accumulated in the information accumulating unit; and a maintenance information output that outputs maintenance information related to maintenance of the parts based on the result of the analysis. A device management system is disclosed comprising:
In this device management system, the device status data storage unit 90d (information storage unit) specifies the operating state, capability value, functional characteristic, misadjustment, deterioration over time, failure, etc. of the parts included in the production line component device 112. Device state data DT, which is information to be (estimated or predicted), is stored. The device status data DT may include, for example, a parameter specifying signs of deterioration or maladjustment of the knife cylinder of the horizontal sealing mechanism 25 of the bag making and packaging machine 20. time to" and "output value of pneumatic sensor", parameter "encoder pulse value of pressure motor during vertical sealing" for specifying signs of deterioration (looseness) or misalignment of the timing belt of the bag making and packaging machine 20, bag making The "load factor of each motor (servo motor)" that specifies insufficient lubrication of each sliding part included in the packaging machine 20, wear of the bearing, or abnormality in the mechanical state is listed.
Then, the analysis unit 90i (information analysis unit) determines whether the parameter related to the device state data DT of the target component is significantly larger or smaller than the corresponding parameter of the other component, or is defined in the capability information. If the numerical value deviates from the specified range, it is determined that there is a high possibility that the target part has signs of deterioration, poor adjustment, or some kind of abnormality.
However, the device management system of Patent Document 4 uses device state data DT such as operating time and air pressure of a knife cylinder (air cylinder), encoder pulse value of a pressurizing motor, load factor of a servo motor, etc. It is used to determine whether there is an adjustment error or an abnormality. Similar to the automatic packaging machine of Patent Document 3, air leakage from the air cylinder is detected so that the operation time and air pressure of the knife cylinder do not change, and an abnormality is detected. In addition, as in Patent Document 2, from the encoder pulse value of the pressure motor and the load factor of the servo motor, it is not determined that signs of deterioration, etc. have occurred. However, it is not possible to detect a slight malfunction or the like in the equipment and to take measures to maintain it before an abnormality occurs.

Japanese Patent Application Laid-Open No. 2001-261145 Japanese Patent Publication No. 2005-528291 Japanese Unexamined Patent Application Publication No. 2012-1211 JP 2017-167815 A

The problem to be solved by the present invention is to acquire a change that indicates a sign before malfunction due to deterioration or abnormality occurs in the driving equipment used in the packaging machine, so that the maintenance of the driving equipment can be achieved. is to be

In the invention of claim 1, the power supply is supplied to the driving device of the packaging machine, which is a servomotor, an air cylinder, or a heater of a heat sealer, while the driving device is operating normally. a drive energy change acquisition means for acquiring a change in drive energy composed of a drive current or compressed air; and when the change in the drive energy acquired by the drive energy change acquisition means exceeds a predetermined range, the drive equipment malfunctions. It is an object of the present invention to solve the above-mentioned problems by providing a predictive maintenance apparatus for driving equipment of a packaging machine, which includes sign determination means for determining a sign that will occur, and determination result output means for outputting the determination result of the sign determination means. .

In the invention according to claim 2, the drive energy change acquisition means is position deviation acquisition means for acquiring a position deviation, which is a deviation in rotation of the servomotor rotated by the drive current supplied by a command with respect to the command, The predictive maintenance device for drive equipment of a packaging machine, wherein the predictive determination means determines that there is a predictive sign of malfunction of the servo motor when the positional deviation acquired by the positional deviation acquisition means exceeds a predetermined range. to solve the above problems.

According to a third aspect of the present invention, the drive energy change acquisition means is leakage amount acquisition means for acquiring the amount of leakage of the compressed air supplied to the air cylinder, and the sign determination means is configured so that the leakage amount acquisition means To solve the above-mentioned problems by providing a predictive maintenance device for driving equipment of a packaging machine, which determines that there is a sign of malfunction of the air cylinder when the leak amount of the obtained compressed air exceeds a predetermined range. is.

In the invention according to claim 4, the drive energy change acquisition means is a current value acquisition means for acquiring a current value of the drive current supplied to the heater, and the sign determination means is acquired by the current value acquisition means. It is an object of the present invention to solve the above problems by providing a predictive maintenance device for drive equipment of a packaging machine, which determines that there is a sign of malfunction of the heater when the fluctuation of the current value exceeds a predetermined range.

According to a fifth aspect of the present invention, the drive energy change acquisition means is a temperature acquisition means for acquiring the temperature from a temperature sensor for detecting the temperature of a heater block in which the heater that is supplied with the drive current and generates heat is embedded. The sign determination means is a predictive maintenance device for driving equipment of a packaging machine, which determines that there is a sign of malfunction of the heater when the temporal change in the temperature acquired by the temperature acquisition means exceeds a predetermined range. It provides and solves the above problems.

In the predictive maintenance device for the driving equipment of the packaging machine according to the first aspect of the invention, before malfunction occurs due to deterioration or abnormality of the driving equipment of the packaging machine, a change indicating a sign is obtained, and the change in the driving equipment is acquired. There is an effect that maintenance can be achieved.

In the predictive maintenance device for the driving equipment of the packaging machine according to the second aspect of the invention, before malfunction occurs due to deterioration or abnormality of the servomotor of the packaging machine, a change indicating a sign thereof is detected, and the change in the servomotor is detected. There is an effect that maintenance can be achieved.

In the predictive maintenance device for the driving equipment of the packaging machine according to the third aspect of the invention, before malfunction occurs due to deterioration or abnormality of the air cylinder of the packaging machine, a change indicating a sign is obtained to obtain the change of the air cylinder. There is an effect that maintenance can be achieved.

In the predictive maintenance device for the driving equipment of the packaging machine according to the fourth aspect of the invention, before malfunction occurs due to deterioration or abnormality of the heater used in the heat sealer of the packaging machine, a change showing a sign is acquired. , there is an effect that the maintenance of the heater can be achieved.

The predictive maintenance device for the driving equipment of the packaging machine according to the fifth aspect of the invention has the same effect as the fourth aspect of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the configuration of a predictive maintenance system for driving equipment provided with a predictive maintenance device for driving equipment of a packaging machine according to the present invention; 1 is a block diagram showing an example configuration of a servo motor predictive maintenance system and a predictive maintenance device; FIG. FIG. 11 is a block diagram showing the configuration of another example of the servo motor predictive maintenance system and the predictive maintenance device; 1 is a block diagram showing the configuration of an air cylinder predictive maintenance system and a predictive maintenance device; FIG. It is a block diagram showing the configuration of an example of a heater predictive maintenance system and a predictive maintenance device. FIG. 10 is a block diagram showing the configuration of another example of the heater predictive maintenance system and the predictive maintenance device; 1 is a perspective view showing a schematic configuration of an end seal/cutting device; FIG. It is a left side view of an end seal / cutting device. It is a front view of an opening-and-closing toggle mechanism rotation part. 4 is a flowchart showing the operation of the predictive maintenance device 4; 4 is a flow chart showing the operation of the servo motor predictive maintenance device 14; FIG. 10 is a graph showing changes in speed when the servomotor 13a opens and closes heater blocks 61 and 62, and a graph showing changes in the current value of the drive current supplied to the servomotor 13a. FIG. 10A and 10B are a graph showing an example of changes in current values (driving current waveforms) and a graph showing changes in current value differences when a failure occurs in a device operated by the rotation of a servomotor 13a; 4 is a flow chart showing the operation of the servo motor predictive maintenance device 24; 4 is a flow chart showing the operation of the air cylinder predictive maintenance device 34; 4 is a flowchart showing the operation of the heater predictive maintenance device 44; 4 is a flowchart showing the operation of the heater predictive maintenance device 54;

[Predictive maintenance system for drive equipment, configuration of predictive maintenance device]
FIG. 1 is a block diagram showing the configuration of a predictive maintenance system for drive equipment provided with a predictive maintenance device for drive equipment of a packaging machine according to the present invention.
In the figure, 1 is a predictive maintenance system, 2 is a drive energy supply unit, 3 is a drive device, 4 is a predictive maintenance device, 5 is a drive energy change acquisition unit, 6 is a predictive determination unit, and 7 is a determination result output unit.
As shown in FIG. 1 , the predictive maintenance system 1 includes a drive energy supply section 2 , a drive device 3 and a predictive maintenance device 4 .
The driving energy supply unit 2 supplies a driving current and driving energy such as compressed air to the driving device 3. Specific examples include a commercial power supply that supplies the driving current, a power supply such as a battery, a compressor that supplies compressed air, and the like. is mentioned.
The drive device 3 has a function of operating the packaging machine, and specific examples thereof include a servomotor, an air cylinder, a heater for a heat sealer, and the like.
The predictive maintenance device 4 has a function of detecting a sign before malfunction due to deterioration or abnormality occurs in the driving equipment 3 and issuing an alarm or the like to maintain the driving equipment 3. It is composed of an omen determination unit 6 and a determination result output unit 7 .
The drive energy change acquisition unit 5 acquires changes in the drive energy supplied from the drive energy supply unit 2 to the drive device 3 while the drive device 3 is operating normally.
The sign determination unit 6 determines whether or not there is a sign of malfunction of the drive device 3 based on the change in the drive energy of the drive device 3 detected by the drive energy change acquisition unit 5 .
The judgment result output unit 7 outputs the judgment result of whether or not there is a sign of malfunction in the driving device 3 by the sign judgment unit 6 .

A case where the predictive maintenance system 1 shown in FIG. 1 is applied to an end sealing/cutting device (described later) of a horizontal pillow packaging machine will be described.
[Configuration of servo motor predictive maintenance system and predictive maintenance device]
FIG. 2 is a block diagram showing the configuration of an example of a servo motor predictive maintenance system and a predictive maintenance device for an end sealing/cutting device.
In the figure, 11 is a servo motor predictive maintenance system, 12 is a power supply, 13 is a servo mechanism, 13a is a servo motor, 13b is a servo amplifier, 13c is a controller, 14 is a servo motor predictive maintenance device, 15 is a current value acquisition unit, and 15a. 15b, a receiver; 15c, a communication line; 16, an arithmetic control unit; 16a, a comparison/determination unit; 16b, a reference current waveform storage;
As shown in FIG. 2 , the servomotor predictive maintenance system 11 comprises a power supply 12 , a servomechanism 13 and a servomotor predictive maintenance device 14 .
The power source 12 is a commercial power source that serves as the drive energy supply unit 2, and supplies a drive current to the servo mechanism 13 (servo motor 13a).
The servomechanism 13 includes a servomotor 13a serving as the drive device 3, a servo amplifier 13b, and a controller 13c.
In the servomechanism 13, based on a command (command signal) from the controller 13c, the servo amplifier 13b controls the drive current supplied to the servomotor 13a to control the position and speed of the servomotor, thereby controlling the end sealing/cutting device. , a heater block (to be described later) is opened and closed.
The servo motor predictive maintenance device 14 is composed of a current value acquisition unit 15 as the drive energy change acquisition unit 5 , an arithmetic control unit 16 as the sign determination unit 6 and an alarm device 17 as the determination result output unit 7 .
The current value acquisition unit 15 includes a transmission unit 15a, a reception unit 15b, and a communication line 15c, and acquires the current value of the drive current supplied to the servomotor 13a.
That is, in the current value acquisition unit 15, the transmission unit 15a continuously acquires the current value of the driving current supplied from the servo amplifier 13b to the servomotor 13a, and transmits the current value to the reception unit 15b via the communication line 15c. Then, the current value received by the receiving unit 15b is sent to the arithmetic control unit 16. FIG.
This current value acquisition unit 15, in place of the transmission unit 15a, the reception unit 15b, and the communication line 15c shown in FIG. , and sent to the arithmetic and control unit 16 via a transmission line or the like.
The arithmetic control unit 16 is composed of a control computer that controls the operation of the horizontal pillow packaging machine, an arithmetic control unit of computer equipment such as a computer of the operation panel, a storage unit, etc., and a comparison determination unit 16a and a reference current waveform storage unit 16b It controls the operation of the current value acquiring unit 15 and the operation of the alarm device 17 .
The reference current waveform storage unit 16b stores a reference current waveform representing temporal changes in the current value of the drive current when the servomotor 13a is operating satisfactorily.
The comparison determination unit 16a stores the current value sent from the reception unit 15c, that is, the drive current waveform representing the temporal change in the current value of the drive current of the servomotor 13a acquired by the current value acquisition unit 15, and the reference current waveform storage unit 16b. is compared with the reference current waveform stored in , and if the degree of change of the drive current waveform with respect to the reference current waveform exceeds a predetermined range, it is determined that there is a sign of malfunction of the servomotor 13a.
The alarm device 17 is composed of the display such as the control computer and the operation panel, and displays an alarm indicating that there is a sign of malfunction of the servomotor 13a based on the judgment result of the comparison judgment section 16a.
In addition, in the servo motor predictive maintenance device 14, a drive current waveform display unit (not shown) that displays the drive current waveform acquired by the current value acquisition unit 15 on a display such as the control computer or the operation panel, A predetermined range setting unit (not shown) for setting may be provided so that the predetermined range can be set by the predetermined range setting unit from the drive current waveform displayed on the drive current waveform display unit.

FIG. 3 is a block diagram showing the configuration of another example of the servo motor predictive maintenance system for the end sealing/cutting device and the predictive maintenance device.
In the figure, 21 is a servo motor predictive maintenance system, 22 is a power supply, 23 is a servo mechanism, 23a is a servo motor, 23b is a servo amplifier, 23c is a controller, 24 is a servo motor predictive maintenance device, 25 is a current value acquisition unit, and 25a. 25b is a receiving part; 25c is a communication line; 26 is an arithmetic control unit; 26a is a positional deviation determining part;
As shown in FIG. 2, the servomotor predictive maintenance system 21 comprises a power supply 22, a servomechanism 23, and a servomotor predictive maintenance device 24. As shown in FIG.
The power source 22 is a commercial power source that serves as the drive energy supply unit 2, like the power source 12, and supplies a drive current to the servo mechanism 23 (servo motor 23a).
The servomechanism 23 includes a servomotor 23a serving as the drive device 3, a servo amplifier 23b, and a controller 23c, similarly to the servomechanism 13. As shown in FIG.
In this servomechanism 23, as in the servomechanism 13, the position and speed of the servomotor are controlled by controlling the drive current supplied to the servomotor 23a by the servo amplifier 23b based on the command (command signal) from the controller 23c. Then, a heater block (to be described later) of the end sealing/cutting device is opened and closed.
The servo motor predictive maintenance device 24 is composed of a positional deviation acquisition section 25 as the drive energy change acquisition section 5 , an arithmetic control device 26 as the sign determination section 6 , and an alarm device 27 as the determination result output section 7 .
The positional deviation acquiring unit 25 includes a transmitting unit 15a, a receiving unit 15b, and a communication line 15c, and acquires a positional deviation, which is a rotation deviation with respect to a command of the servomotor 13a.
That is, in the servomechanism 23, the command pulse from the positioning unit of the controller 23c is added to the deviation counter of the servo amplifier 23b, while the feedback pulse from the encoder of the servomotor 23a is subtracted. An accumulation (accumulation pulse) is generated, and this accumulation pulse represents a positional deviation, which is a deviation of rotation with respect to the command.
In the positional deviation acquiring unit 25, the transmitting unit 25a continuously acquires the accumulated pulses (positional deviation) accumulated in the deviation counter of the servo amplifier 23b, and transmits them to the receiving unit 25b via the communication line 25c, The accumulated pulse (positional deviation) received by the receiver 25 b is sent to the arithmetic control unit 26 .
This positional deviation acquiring unit 25, in place of the transmitting unit 25a, receiving unit 25b, and communication line 25c shown in FIG. , and sent to the arithmetic and control unit 26 via a transmission line or the like.
The arithmetic control unit 26, like the arithmetic control unit 16, is composed of a control computer that controls the operation of the horizontal pillow packaging machine, an arithmetic control unit of computer equipment such as a computer of the operation panel, a storage unit, etc., and a position deviation determination unit 26 a , and controls the operation of the position deviation acquisition unit 25 and the operation of the alarm device 27 .
The positional deviation determination unit 26a determines whether the accumulated pulse (positional deviation) sent from the receiving unit 25c, that is, the accumulated pulse (positional deviation), which is the deviation in rotation with respect to the command of the servo motor 23a acquired by the positional deviation acquisition unit 25, is within a predetermined range. is exceeded, it is determined that there is a sign of malfunction of the servomotor 23a.
The alarm device 27 is composed of the display such as the control computer and the operation panel, and displays an alarm indicating that there is a sign of malfunction of the servomotor 23a based on the judgment result of the positional deviation judging section 26a.

[Configuration of air cylinder predictive maintenance system and predictive maintenance device]
FIG. 4 is a block diagram showing the configuration of the air cylinder predictive maintenance system and predictive maintenance device of the end seal/cutting device.
In the figure, 31 is an air cylinder predictive maintenance system, 32 is a compressor, 33 is an air cylinder operating mechanism, 33a is an air cylinder, 33a1 is a piston rod, 33a2 is a pressure chamber, 33a3 is an open chamber, 33b is a flow meter, and 33c is an electromagnetic 33d1 to 33d3 are pipes, 34 is an air cylinder predictive maintenance device, 35 is a flow rate acquisition unit, 36 is an arithmetic control unit, 36a is an air leakage determination unit, and 37 is an alarm pipe.
As shown in FIG. 4 , the air cylinder predictive maintenance system 31 comprises a compressor 32 , an air cylinder operating mechanism 33 and an air cylinder predictive maintenance device 34 .
The compressor 32 serves as the drive energy supply unit 2 and supplies compressed air to the air cylinder operating mechanism 33 (air cylinder 33a).
The air cylinder operating mechanism 33 includes an air cylinder 33a serving as the drive device 3, a flow meter 33b, an electromagnetic valve 33c, and pipes 33d1 to 33d3.
In the air cylinder operating mechanism 33, the compressed air supplied from the compressor 32 and passed through the flow meter 33b and the pipe 33d1 flows into the pressure chamber 33a2 through the pipe 33d2 by the solenoid valve 33c, and the pressure chamber 33a2 in the open chamber 33a3. Air is discharged from the solenoid valve 33b through the pipe 33d3, which moves the piston rod 33a1 to move the cutting knife (to be described later), thereby performing the cutting operation of the cutting device (to be described later).
The air cylinder predictive maintenance device 34 is composed of a flow rate acquisition unit 35 as the drive energy change acquisition unit 5 , an arithmetic control device 36 as the sign determination unit 6 , and an alarm device 37 as the determination result output unit 7 .
The flow rate acquisition unit 35 obtains the flow rate (numerical value) of the compressed air flowing through the pipe 33d1 measured by the flow meter 33b in a state where the air cylinder 23 is cut off and the operation of the air cylinder 23 is stopped. is obtained as an analog signal, and the analog signal of the obtained compressed air leakage amount (numerical value) is sent to the arithmetic and control unit 26 via a transmission line or the like.
The flow rate acquisition unit 35 includes a transmission unit, a reception unit, and a communication line like the current value acquisition unit 15 shown in FIG. It may be acquired, transmitted to the receiving section via a communication line, and the leakage amount (numerical value) may be sent to the arithmetic and control unit 36 as a digital signal from the receiving section.
The arithmetic control unit 36 is composed of a control computer that controls the operation of the horizontal pillow packaging machine, an arithmetic control unit of computer equipment such as a computer of the operation panel, a storage unit, etc., includes an air leakage determination unit 36a, and a flow rate acquisition unit 35 and the operation of the alarm 37 are controlled.
The air leakage determination unit 36a determines that there is a sign of malfunction of the air cylinder 33a when the leak amount (numerical value) of the compressed air acquired by the flow rate acquisition unit 35 exceeds a predetermined range.
The alarm device 37 is composed of the control computer, a display such as an operation panel, etc., and displays an alarm indicating that there is a sign of malfunction of the air cylinder 33a based on the judgment result of the air leakage judging section 36a.
In addition, when the packaging machine uses a plurality of air cylinders, the piping connected to each air cylinder is branched from the main piping. , the air leakage of each air cylinder can be measured with this single flow meter.

[Configuration of heater predictive maintenance system and predictive maintenance device]
FIG. 5 is a block diagram showing the configuration of an example of a heater predictive maintenance system and a predictive maintenance device for an end sealing/cutting device.
In the figure, 41 is a heater predictive maintenance system, 42 is a power supply, 43 is a heater drive circuit, 43a is a cartridge heater, 43b is an ammeter, 43c is an SSR (solid state relay), 44 is a heater predictive maintenance device, and 45 is a current value. An acquisition unit, 46 is an arithmetic control unit, 46a is a current value change determination unit, and 47 is an alarm device.
As shown in FIG. 5, the heater predictive maintenance system 41 comprises a power supply 42, a heater drive circuit 43, and a heater predictive maintenance device 44. FIG.
The power source 32 is a commercial power source serving as the drive energy supply unit 2, and supplies drive current to the heater drive circuit 43 (cartridge heater 43a).
The heater driving circuit 43 includes a cartridge heater 43a, an ammeter 43b, and an SSR 43c, which serve as the driving device 3. As shown in FIG.
In the heater drive circuit 43, the drive current supplied from the power supply 42 is turned on and off by the SSR 43c (contactless relay using a semiconductor switching element). , the cartridge heater 43a generates heat, thereby raising the temperature of a heater block (described later) of the end sealing/cutting device in which the cartridge heater 43a is embedded to the sealing temperature. At this time, the current value of the current flowing through the cartridge heater 43a is measured by the ammeter 43b.
The heater predictive maintenance device 44 is composed of a current value acquisition unit 45 as the drive energy change acquisition unit 5 , an arithmetic control unit 46 as the sign determination unit 6 , and an alarm device 47 as the determination result output unit 7 .
The current value acquisition unit 45 continuously acquires the current value of the drive current supplied to the cartridge heater 43a measured by the ammeter 43b as an analog signal, and transmits the analog signal of the acquired current value to the arithmetic control unit through a transmission line or the like. Send to 46.
This current value acquisition unit 45 includes a transmission unit, a reception unit, and a communication line like the current value acquisition unit 15 shown in FIG. The current value may be sent to the receiving section via a line, and the receiving section may send the current value to the arithmetic and control unit 46 as a digital signal.
The arithmetic control unit 46 is composed of a control computer that controls the operation of the horizontal pillow packaging machine, an arithmetic control unit of computer equipment such as a computer of the operation panel, a storage unit, etc., and includes a current value change determination unit 46a, and acquires the current value. It controls the operation of the unit 45 and the operation of the alarm device 47 .
The current value change determination unit 46a outputs a determination that there is a sign of malfunction to the cartridge heater 43a when the change in the current value acquired by the current value acquisition unit 45 exceeds a predetermined range.
The alarm device 47 is composed of the display such as the control computer and the operation panel, and displays an alarm indicating that the cartridge heater 43a is malfunctioning based on the judgment result of the current value change judgment section 46a.

FIG. 6 is a block diagram showing the configuration of another example of the heater predictive maintenance system and predictive maintenance device for the end sealing/cutting device.
In the figure, 51 is a heater predictive maintenance system, 52 is a power supply, 53 is a seal temperature control device, 53a is a cartridge heater, 53b is an ammeter, 53c is an SSR (solid state relay), 53d is a temperature sensor, and 53e is a temperature controller. , 54 is a heater predictive maintenance device, 55 is a temperature acquisition unit, 56 is an arithmetic control unit, 56a is a temperature change determination unit, and 57 is an alarm device.
As shown in FIG. 6, the heater predictive maintenance system 51 includes a power supply 52, a seal temperature control device 53, and a heater predictive maintenance device .
The power source 52 is a commercial power source serving as the drive energy supply unit 2, and supplies a drive current to the cartridge heater 53a of the seal temperature control device 53. As shown in FIG.
The seal temperature control device 53 includes a cartridge heater 53a serving as the drive device 3, an ammeter 53b, an SSR 53c, a temperature sensor 53d, and a temperature controller 53e.
In the seal temperature control device 53, the drive current supplied from the power source 52 is turned on and off by the SSR 53c, and when the SSR 53c is on, the drive current is supplied to the cartridge heater 53a, causing the cartridge heater 53a to generate heat. As a result, the temperature of the heater block (described later) of the end sealing/cutting device in which the cartridge heater 53a is embedded rises.
At this time, a temperature sensor 53d such as a thermocouple embedded in the heater block detects the temperature of the heater block and sends the detected temperature to the temperature controller 53e. The temperature controller 53e turns on the SSR 53c when the temperature from the temperature sensor 53d is lower than the seal temperature, supplies drive current to the cartridge heater 43a, and turns off the SSR 53c when the temperature from the temperature sensor 53d is higher than the seal temperature. to stop supplying the drive current to the cartridge heater 53a. This keeps the temperature of the heater block at the seal temperature.
The heater predictive maintenance device 54 is composed of a temperature acquisition unit 55 as the drive energy change acquisition unit 5 , an arithmetic control unit 56 as the sign determination unit 6 , and an alarm device 57 as the determination result output unit 7 .
The temperature acquisition unit 55 continuously acquires the temperature of the heater block detected by the temperature sensor 53d as an analog signal, and sends the analog signal of the acquired temperature to the arithmetic control unit 56 via a transmission line or the like.
The temperature acquisition unit 55 includes a transmission unit, a reception unit, and a communication line like the current value acquisition unit 15 shown in FIG. The temperature may be transmitted to the receiving section via the receiving section, and the temperature may be sent to the arithmetic and control unit 56 as a digital signal from the receiving section.
Arithmetic control device 56 is composed of a control computer that controls the operation of the horizontal pillow packaging machine, an arithmetic control unit of computer equipment such as a computer of an operation panel, a storage unit, etc., and includes a temperature change determination unit 56a, and a temperature acquisition unit 55 and the operation of the alarm device 57.
The temperature change determination unit 56a outputs a determination that there is a sign of malfunction to the cartridge heater 53a when the temporal change in the temperature acquired by the temperature acquisition unit 55 exceeds a predetermined range.
The alarm device 57 is composed of a display such as the control computer and the operation panel, and displays an alarm indicating that the cartridge heater 53a is malfunctioning based on the judgment result of the temperature change judgment section 56a.

[End seal/cutting device]
An end sealing/cutting device for a horizontal pillow packaging machine equipped with servomotors 13a, 23a, air cylinders 33a, and cartridge heaters 43a, 53a will be described.
7 is a perspective view showing a schematic configuration of the end seal/cutting device, FIG. 8 is a left side view of the end sealing/cutting device, and FIG. 9 is a front view of the opening/closing toggle mechanism rotating portion.
In the figure, 13d is a speed reducer, 43a1 (53a1) and 43a2 (53a2) are cartridge heaters, 60 is an end sealing/cutting device, 61 and 62 are heater blocks, 61a and 62a are center grooves, and 61b and 62b are heater block holders. , 61c is a guide hole, 63 is an open/close toggle mechanism, 63a is a rotating shaft, 63b is a rotating plate, 63c and 63d are driven arms, 63e and 63f are holding members, 64 is a holder driving block, 65a and 65b are supporting blocks, and 65c. , 65d is a connecting plate, 66a and 66b are connecting rods, 67 is a cutting device, 67a is a support plate, 67b is a slider, 67c and 67d are guide rods, and 68 is a cutting knife.
In the end sealing/cutting unit 60, central grooves 61a and 62a are provided in heater blocks 61 and 62 in which cartridge heaters 43a (43a1 and 43a2) and 53a (53a1 and 53a2) are embedded. The heater block holder 61b is provided with a guide hole 61c. The heater block 62 is attached to the upper surface of the heater block holder 62b. is installed.
The heater block holder 61b is connected to the holder driving block 64 by connecting rods 66a and 66b, and the heater block holder 62b is connected to the holder driving block 64 via the open/close toggle mechanism 63 and slides on the connecting rods 66a and 66b. The connecting rods 66a and 66b are slidably supported by supporting blocks 65a and 65b, and the supporting blocks 65a and 65b are connected by connecting plates 64c and 64d. is attached with a holding member 63f.
In the open/close toggle mechanism 63, a rotating plate 63b is attached to a rotating shaft 63a, one end of driven arms 63c and 63d is rotatably attached to both ends of a rotating arm 63b, and the other end of the driven arm 63c is attached to a holding member 63e. The other end of the driven arm 463d is rotatably attached to a holding member 63f, and the rotating shaft 63a is connected to a heater block opening/closing servomotor 13a (23a) through a speed reducer 13d.
The cutting device 67 is slidably supported by a support plate 67a, an air cylinder 33a attached to the upper surface of the support plate 67a, guide rods 67c and 67d attached to the lower surface of the support plate 67a, and guide rods 67c and 67d. and a cutting knife 68 attached to the slider 67b.
The tip of the piston rod 33a1 of the air cylinder 33a is attached to the slider 67b, and the tips of the guide rods 67c and 67d are attached to the inner surface of the guide hole 61c of the heater block holder 61b.

In the end sealing/cutting device 60, when the rotary shaft 63a of the open/close toggle mechanism 63 is rotated by the servomotor 13a (23a) to rotate the rotary plate 63b, the heater block holder 62b is connected to the connecting rod 66a through the driven arm 63c. Move along 66b. At the same time, the holder drive block 64 moves via the driven arm 63d, the connecting rods 66a and 66b move along the support blocks 65a and 65b, and the heater block holder 61b moves in the opposite direction to the heater block holder 62b. .
As a result, the opening/closing operation (separating/contacting operation) of the heater block 61 and the heater block 62 is performed.
Also, in the cutting device 67, by operating the air cylinder 33a, the slider 67b moves inside the guide hole 61c of the heater block holder 61b along the guide rods 67c and 67d via the piston rod 33a1. Cutting knife 68 attached to 67b moves.
When the heater block 61 and the heater block 62 are closed, an end seal is applied to the cylindrical continuous film (not shown) formed with the center seal, and the air cylinder 33a of the cutting device 67 is activated. Then, the cutting knife 67 protrudes from the central groove 61a of the heater block 61 and enters the central groove 62b of the heater block 62, cuts the end-sealed cylindrical continuous film, and cuts the package filled with the items to be packaged. body is generated.

Next, the operation of predictive maintenance device 4 for drive equipment shown in FIG. 1, the operation of servo motor predictive maintenance devices 14 and 24 shown in FIGS. The operation of the heater predictive maintenance devices 44 and 54 shown in FIG.
[Operation of predictive maintenance device 4 for drive equipment]
FIG. 10 is a flowchart showing the operation of the predictive maintenance device 4, and the operation of the predictive maintenance device 4 will be described below.
First, in a state where driving energy is supplied from the driving energy supply unit 2 to the driving device 3 and the driving device 3 is operating normally, the driving energy change acquiring unit 5 detects changes in the driving energy supplied to the driving device 3. (S1).
Next, based on the change in the drive energy of the drive device 3 acquired by the drive energy change acquisition unit 5, the sign determination unit 6 determines whether or not there is a sign of malfunction of the drive device 3 (S2).
Next, the judgment result output unit 7 outputs the judgment result by the symptom judgment unit 6 (S3).
For example, when the sign determination unit 6 determines that there is a sign of malfunction in the driving device 3, the determination result output unit 7 outputs a warning that there is a sign of malfunction in the driving device 3 as a determination result. .
Further, when the symptom determination unit 6 determines that there is no symptom of malfunction in the driving device 3, the determination result output unit 7 outputs nothing as a determination result, or there is no symptom of malfunction in the driving device 3. output that

[Operation of Servo Motor Predictive Maintenance Device 14]
FIG. 11 is a flow chart showing the operation of the servo motor predictive maintenance device 14. The operation of the servo motor predictive maintenance device 14 will be described below.
First, a drive current is supplied from the power source 12 to the servo mechanism 13 (servo motor 13a), and in a state where the servo motor 13a is operating normally, the current value acquisition unit 15 detects the drive current supplied to the servo motor 13a. Current values are continuously acquired, and the acquired current values are sent to the arithmetic and control unit 16 (S11).
Specifically, in the current value acquisition unit 15, the transmission unit 15a continuously acquires the current value of the drive current supplied from the servo amplifier 13b to the servomotor 13a, and outputs the current value to the reception unit 15b via the communication line 15c. , and the current value received by the receiving unit 15 b is sent to the arithmetic and control unit 16 .
Next, the comparison determination unit 16a of the arithmetic control unit 16 stores the drive current waveform representing the temporal change in the current value of the drive current of the servomotor 13a acquired by the current value acquisition unit 15 and the reference current waveform storage unit 16b. The reference current waveforms are compared (S12).
Then, the comparison/determination unit 16a determines whether or not the degree of change of the drive current waveform with respect to the reference current waveform exceeds a predetermined range (S13). (S14), the determination result is sent to the alarm device 17, and an alarm indicating that there is a sign of malfunction is displayed in the alarm device 17 (S15), and the process ends.
On the other hand, if the comparison/determination unit 16a determines in step S13 that the degree of change of the drive current waveform with respect to the reference current waveform does not exceed the predetermined range, it determines that there is no sign of malfunction of the servomotor 13a (S16). , the process is terminated without displaying a warning in the alarm device 17 .

Here, the reference current waveform stored in the reference current waveform storage unit 16b, the drive current waveform of the servo motor 13a acquired by the current value acquisition unit 15, and the determination method in the comparison determination unit 16a will be described.
FIG. 12(a) is a graph showing changes in speed when the servomotor 13a opens and closes the heater blocks 61 and 62 of the end sealing/cutting device 60, and FIG. 2 is a graph showing changes in the current value of the drive current supplied to the servomotor 13a when rotating at the speed change shown in FIG. The vertical axis represents the current value, and the horizontal axis in (a) and (b) of the figure represents time. In the figure, ws is the velocity waveform and wa1 is the reference current waveform.
As shown by the speed waveform ws in FIG. 12(a), the servo motor 13a rotates at an accelerated speed, rotates at a constant speed, and rotates at a reduced speed from time t0 to t1 to close the heater blocks 61 and 62. From time t2 to t2, the heater blocks 61 and 62 are sealed by performing the sealing operation (the operation of pressing the heater blocks 61 and 62) without rotating. Perform an open operation.
At this time, the temporal change in the current value of the drive current supplied to the servomotor 13a becomes like the reference current waveform wa1 shown in FIG. 12(b). In this case, the reason why the current value of the driving current is maximum even though the rotation speed of the servomotor 13a is 0 during the time t1 to t2 is that the heater blocks 61 and 62 are kept constant in order to perform the sealing operation. This is because it is pressed with a pressure of
A reference current waveform wa1 shown in FIG. 12(b) indicates a change in the current value of the drive current when there is no defect at all in a device such as a speed reducer that is operated by the rotation of the servomotor 13a. A reference current waveform wa1 is stored in the storage unit 16b.

FIG. 13(a) is a graph showing an example of changes in the current value (driving current waveform) acquired by the current value acquiring unit 15 when a failure occurs in a device operated by the rotation of the servomotor 13a; b) is a graph showing changes in the current value difference, which is the difference between the current values shown in FIG. 12(b) and the current values shown in FIG. 13(a). The vertical axis in FIG. 13(b) represents the difference in current values, and the horizontal axis in FIGS. 13(a) and 13(b) represents time. wd1, wd2, and wd3 are current value difference waveforms.
Even when the servomotor 13a is operating normally, if a failure such as wear of the gear head of the speed reducer 13d or lack of oil in the bearing occurs, the drive current waveform of the servomotor 13a will change, for example, as shown in FIG. ), the driving current waveform wa2 is obtained by changing the waveform from the reference current waveform wa1 at the waveform changing portions fr1, fr2, and fr3.
Then, by calculating the difference between the reference current waveform wa1 and the drive current waveform wa2, current value difference waveforms wd1, wd2, and wd3 shown in FIG. 13(b) are obtained.
In step s13, the comparison/determination unit 16a determines whether the maximum value of any one of the current value difference waveforms wd1, wd2, and wd3 exceeds ±ds, which is a predetermined range. (S14), and if not exceeded, it is determined that there is no malfunction of the servo motor 13a (S16).
In FIG. 13B, since the maximum value of the current value difference waveform wd3 exceeds ds, the comparison/determination unit 16a determines that the servomotor 13a has malfunction.
Further, the drive current waveform display unit displays a drive current waveform wa2 and current value difference waveforms wd1, wd2, and wd3 as shown in FIGS. A certain ±ds may be set.
Even when the servomotor 13a is operating normally as described above, if a failure such as wear of the gear head of the speed reducer 13d or lack of oil in the bearing occurs, the driving current waveform wa2 will be different from the reference current waveform wa1. If it changes and the degree of change exceeds a predetermined range, it is determined that there is a sign of malfunction of the servomotor 13a, and maintenance of the servomotor 13a can be attempted.

[Operation of Servo Motor Predictive Maintenance Device 24]
FIG. 14 is a flowchart showing the operation of the servo motor predictive maintenance device 24. The operation of the servo motor predictive maintenance device 24 will be described below.
First, a drive current is supplied from the power source 22 to the servo mechanism 23 (servo motor 23a), and in a state where the servo motor 23a is operating normally, the position deviation acquisition unit 25 acquires accumulated pulses (position deviation), The acquired accumulated pulse (positional deviation) is sent to the arithmetic control unit 26 (S21).
Specifically, in the positional deviation acquiring unit 25, the transmitting unit 25a continuously acquires the accumulated pulses (positional deviation) accumulated in the deviation counter of the servo amplifier 23b, and the receiving unit 25b through the communication line 25c. , and the accumulated pulse (positional deviation) received by the receiving unit 25 b is sent to the arithmetic and control unit 26 .
Next, the position deviation determination unit 26a of the arithmetic control unit 26 determines whether or not the accumulated pulse (position deviation) acquired by the position deviation acquisition unit 25 exceeds a predetermined range (S22), and determines that it does. In this case, it is determined that there is a sign of malfunction in the servomotor 23a (S23), the determination result is sent to the alarm device 27, and an alarm indicating that there is a sign of malfunction is displayed in the alarm device 27 (S24). ) and terminate the process.
On the other hand, in step S22, when the positional deviation determination unit 26a determines that the accumulated pulse (positional deviation) does not exceed the predetermined range, it determines that there is no sign of malfunction of the servomotor 23a (S25), and the alarm device 27 Terminate the process without displaying the warning in .
The accumulated pulse (positional deviation) acquired by the positional deviation acquiring unit 25 in this way represents the deviation of rotation with respect to the command of the servomotor 23a. If a failure such as wear of the gear head or lack of oil in the bearing occurs, the accumulated pulse (position deviation) increases, and if the accumulated pulse (position deviation) exceeds a predetermined range, it is determined that there is a sign of malfunction of the servo motor 23a As a result, the maintenance of the servomotor 23a can be achieved.

[Operation of air cylinder predictive maintenance device 34]
FIG. 15 is a flowchart showing the operation of the air cylinder predictive maintenance device 34. The operation of the air cylinder predictive maintenance device 34 will be described below.
The air cylinder predictive maintenance device 34 functions when operating the cutting device 67 of the end seal/cutting unit 60 .
First, in the air cylinder operating mechanism 33, the electromagnetic valve 33c is operated to allow the compressed air supplied from the compressor 32 through the flow meter 33b and the pipe 33d1 to flow into the pressure chamber 33a2 of the air cylinder 33a through the pipe 33d2. , the air in the open chamber 33a3 is discharged from the electromagnetic valve 33b through the pipe 33d3 to move the piston rod 33a1 to operate the cutting device 67, and then the movement of the piston rod 33a1 is stopped.
In this state, the flow rate acquisition 35 acquires the flow rate of the compressed air flowing through the pipe 33d1 measured by the flow meter 33b as a leak rate, and sends the acquired leak rate of the compressed air to the arithmetic control unit 36 (S31).
In this case, if there is air leakage from the pressure chamber 33a2 that causes malfunction of the air cylinder 33a, the amount of compressed air that leaks from the pressure chamber 33a2 is released from the compressor 32 via the flow meter 33b and the pipes 33d1 and 33d2. The flow rate of the compressed air supplied to the pressure chamber 33a2 and flowing into the pressure chamber 33a2 is measured by the flow meter 33b as the leak amount.
Next, the air leakage determination unit 36a of the arithmetic control unit 36 determines whether or not the compressed air leakage amount acquired by the flow acquisition unit 35 exceeds a predetermined range (for example, several milliliters/minute) (S32). If it is determined that there is a sign of malfunction in the air cylinder 33a (S33), this determination result is sent to the alarm device 27, and the alarm device 37 warns that there is a sign of malfunction. is displayed (S34), and the process ends.
On the other hand, in step S32, when the air leakage determination unit 36a determines that the amount of compressed air leakage acquired by the flow acquisition unit 35 does not exceed the predetermined range, it determines that there is no sign of malfunction of the air cylinder 33a ( S35), the process is terminated without displaying a warning on the alarm device 37. FIG.
Even when the air cylinder 33a is operating normally in this way, if even a small amount of air leaks from the pressure chamber 33a2, the leak amount can be measured by the flow meter 33b. If the leakage amount measured by 33b and acquired by the flow rate acquiring unit 35 exceeds a predetermined range, it is determined that there is a sign of malfunction of the air cylinder 33a, and the air cylinder 33a can be operated.

[Operation of heater predictive maintenance device 44]
FIG. 16 is a flowchart showing the operation of the heater predictive maintenance device 44, and the operation of the heater predictive maintenance device 44 will be described below.
First, the heater drive circuit 43
3, a driving current is supplied from the power source 42 to the cartridge heater 43a through the SSR 43c and the ammeter 43b to heat the cartridge heater 43a and keep the heater blocks 61 and 62 at the sealing temperature.
Then, the current value acquisition unit 45 continuously acquires the current value of the drive current supplied to the cartridge heater 43a measured by the ammeter 43b, and sends the acquired current value to the arithmetic control unit 46 (S41).
In this case, when the cartridge heater 43a begins to deteriorate, the change in the current value of the drive current supplied to the cartridge heater 43a for maintaining the heater blocks 61 and 62 at the seal temperature increases.
Next, the current value change determination unit 46a of the arithmetic control device 46 determines whether the change in the current value acquired by the current value acquisition unit 45 exceeds a predetermined range (for example, several percent of the reference value) (S42). If it is determined that it exceeds the threshold, it is determined that there is a sign of malfunction in the cartridge heater 43a (S43), and this determination result is sent to the alarm device 47. is displayed (S44), and the process ends.
On the other hand, in step S42, when the current value change determination unit 46a determines that the change in the current value acquired by the current value acquisition unit 45 does not exceed the predetermined range, it determines that there is no sign of malfunction of the cartridge heater 43a. (S45), the processing is terminated without displaying a warning on the alarm device 47. FIG.
Even when the heater blocks 61 and 62 are maintained at the sealing temperature and the sealing operation is performed normally, the heater blocks 61 and 62 are maintained at the sealing temperature when the cartridge heater 43a begins to deteriorate. Since the change in the current value of the drive current supplied to the cartridge heater 43a for the purpose becomes large, if the change in the current value of the drive current exceeds a predetermined range, it is determined that there is a sign of malfunction of the cartridge heater 43a, Maintenance of the cartridge heater 43a can be achieved.

[Operation of heater predictive maintenance device 54]
FIG. 17 is a flowchart showing the operation of the heater predictive maintenance device 54, and the operation of the heater predictive maintenance device 54 will be described below.
First, in the seal temperature control device 53, a drive current is supplied from the power supply 52 to the cartridge heater 53a via the SSR 53c and the ammeter 53b, and the cartridge heater 53a is heated to raise the temperature of the heater blocks 61 and 62 to the seal temperature. A temperature sensor 53d detects the temperatures of the heater blocks 61 and 62, and a temperature controller 53e controls on/off of supply of drive current to the cartridge heater 53a to keep the heater blocks 61 and 62 at the sealing temperature.
The temperature acquisition unit 55 continuously acquires the temperature of the heater block detected by the temperature sensor 53 d and sends the acquired temperature to the arithmetic control device 56 . (S51).
In this case, when the cartridge heater 53a begins to deteriorate, the fluctuation (frequency of change) of the temperature of the heater blocks 61 and 62 increases, or the time required to reach the seal temperature increases.
Next, the temperature change determination unit 56a of the arithmetic control unit 56 determines whether the temperature change (for example, temperature fluctuation or the time required to reach the seal temperature) acquired by the temperature acquisition unit 55 exceeds a predetermined range. (S52), if it is determined that it exceeds, it is determined that there is a sign of malfunction in the cartridge heater 53a (S53). An alarm to the effect that there is, etc., is displayed (S54), and the process ends.
On the other hand, in step S52, when the temperature change determination unit 56a determines that the change in the current value acquired by the current value acquisition unit 45 does not exceed the predetermined range, it determines that there is no sign of malfunction of the cartridge heater 53a ( S55), the process is terminated without displaying a warning on the alarm device 57. FIG.
Even when the heater blocks 61 and 62 are maintained at the sealing temperature and the sealing operation is performed normally, the temperature of the heater blocks 61 and 62 fluctuates greatly when the cartridge heater 43a begins to deteriorate. If the change in the temperature of the heater blocks 61 and 62 exceeds a predetermined range, it is determined that there is a sign of malfunction of the cartridge heater 53a, and maintenance of the cartridge heater 53a is performed. can be planned.

The predictive maintenance system and predictive maintenance method for the drive equipment of the packaging machine of the present invention detects changes that indicate signs of malfunction before deterioration or abnormality occurs in the drive equipment used in the packaging machine. , the drive equipment can be maintained, and it can be used for horizontal pillow packaging machines, vertical pillow packaging machines, overwrap packaging machines, wrapping packaging machines, and the like.

1 Predictive maintenance system 2 Drive energy supply unit 3 Drive device 4 Predictive maintenance device 5 Drive energy change detection unit 6 Predictive determination unit 7 Judgment result output unit 11, 21 Servo motor predictive maintenance system 12, 22 Power supply 13, 23 Servo mechanism 13a, 23a servo motors 13b, 23b servo amplifiers 13c, 23c controller,
13d reduction gears 14, 24 servo motor predictive maintenance devices 15, 25 current value acquisition units 15a, 25a transmission units 15b, 25b reception units 15c, 25c communication line,
16, 26 Arithmetic control units 16a, 26a Comparison determination units 16b, 26b Reference current waveform storage units 17, 27, 37, 47, 57 Alarm device 31 Air cylinder predictive maintenance system 32 Compressor 33 Air cylinder operating mechanism 33a Air cylinder 33a1 Piston rod 33a2 pressure chamber 33a3 open chamber 33b flow meter 33c solenoid valves 33d1 to 33d3 piping,
34 Air cylinder predictive maintenance device 35 Flow rate acquisition unit 36 Arithmetic control unit 36a Air leak determination unit 41, 51 Heater predictive maintenance system 42, 52 Power supply 43 Heater drive circuit 43a, 43a1, 43a2, 53a, 53a1, 53a2 Cartridge heater 43b, 53b ammeter 43c, 53c SSR
44, 54 Heater predictive maintenance device 45 Current value acquisition units 46, 56 Arithmetic control device 46a Current value change determination unit 53 Seal temperature control device 53d Temperature sensor 53e Temperature controller 60 End sealing/cutting devices 61, 62 Heater blocks 61a, 62a Central grooves 61b, 62b Heater block holder 61c Guide hole 63 Opening/closing toggle mechanism 63a Rotating shaft 63b Rotating plates 63c, 63d Follower arms 63e, 63f Holding member 64 Holder driving blocks 65a, 65b Supporting blocks 65c, 65d Connecting plates 66a, 66b Connecting rod 67 cutting device 67a support plate 67b sliders 67c, 67d guide rod 68 cutting knife

Claims (5)

Consists of drive current or compressed air supplied to the driving equipment of the packaging machine, which is either a servomotor, an air cylinder, or a heater of a heat sealer, while the driving equipment is operating normally. a drive energy change acquiring means for acquiring a change in drive energy;
a sign determination means for determining a sign of malfunction of the driving equipment when the change in the driving energy acquired by the driving energy change acquisition means exceeds a predetermined range;
A predictive maintenance apparatus for a driving device of a packaging machine, comprising: determination result output means for outputting a determination result of the predictive determination means. The drive energy change acquisition means is position deviation acquisition means for acquiring a position deviation, which is a deviation in rotation of the servomotor rotated by the drive current supplied by a command with respect to the command,
2. The packaging machine according to claim 1, wherein said sign determination means determines that there is a sign of malfunction of said servomotor when the positional deviation acquired by said positional deviation acquisition means exceeds a predetermined range. Predictive maintenance device for drive equipment. the driving energy change obtaining means is leakage amount obtaining means for obtaining a leakage amount of the compressed air supplied to the air cylinder;
2. The sign determination means determines that there is a sign of malfunction of the air cylinder when the leak amount of the compressed air acquired by the leak amount acquisition means exceeds a predetermined range. A predictive maintenance device for drive equipment of the described packaging machine. The drive energy change acquisition means is current value acquisition means for acquiring a current value of the drive current supplied to the heater,
2. The predictor determination means according to claim 1, wherein when the fluctuation of the current value acquired by the current value acquisition means exceeds a predetermined range, it is determined that there is a sign of malfunction of the heater. Predictive maintenance equipment for drive equipment of packaging machines. The drive energy change acquisition means is temperature acquisition means for acquiring a temperature from a temperature sensor for detecting a temperature of a heater block embedded with the heater that generates heat when supplied with the drive current,
2. The packaging according to claim 1, wherein said sign determination means determines that there is a sign of malfunction of said heater when a temporal change in the temperature acquired by said temperature acquisition means exceeds a predetermined range. Predictive maintenance device for machine drive equipment.

Images