JPH04339798A - Unloading system for tank lorry - Google Patents

Abstract

PURPOSE:To provide an unloading system for tank lorry which permits the oil loaded in the hatches thereof to be supplied unmistakably into a proper tank at the destination. CONSTITUTION:A key for a valve lock to lock the hatch handle on a tank lorry is inserted into key inserting openings 18A-18C of a key fetching machine 18. A separate key is provided for each kind of oil and, with this key, the aforesaid valve lock and a tank lock for locking the lid on a tank at the destination for receiving the oil of the corresponding kind can be opened. The key fetching machine 18 reads out the customer data and the oil kind data stored in a VIN card 31 and a customer card 32 at the card inserting opening 18E. When the oil kind in the customer data agrees with that in the oil kind data, a lamp for one of key selection buttons 19A-19C corresponding to this oil kind lights up and this lighted key selection button is depressed to take out the key.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a tank lorry unloading system, and more particularly, to a tank lorry unloading system configured to ensure that oil loaded in a plurality of hatches can be unloaded into a tank at a delivery destination. Regarding.

0002

2. Description of the Related Art Tanker trucks are generally used as means for delivering oil fluid from oil depots to gas stations and the like.

[0003] The tank of a tank truck is partitioned into a plurality of hatches, and each hatch is marked with a number, for example, according to the order of the delivery destination. Gasoline is in hatch No. 1, hatch No. Light oil in hatch No. 2, hatch No. Hatch No. 3 is often loaded with a different type of oil, such as kerosene, for each hatch. Therefore, when the tanker truck arrives at the destination gas station, the worker looks at the name plate or the like installed near the filler port of the underground tank to confirm that the type of oil in the underground tank is, for example, gasoline.

After that, one end of the oil supply hose was connected to the No. 1 tank truck loaded with gasoline. 1, and the other end is connected to the oil inlet installed in the underground tank for gasoline, and then, for example, open the on-off valve installed in the oil inlet of the hatch of the tank truck. Unloading takes place. Similar operations will be performed when unloading light oil and kerosene.

However, in the past, as described above, the oil type in each hatch of the lorry car and the oil type in the underground tank were checked by the operator's judgment, and the oil supply port of the hatch of the lorry car was matched with the oil filler port of the underground tank. Because the oil was unloaded by connecting via the oil supply hose provided on the lorry, for example, workers could misread the nameplate displaying the type of oil in the underground tank, or the type of oil loaded into a designated hatch could be incorrect. If the oil was mistaken for another type of oil, for example, there was a possibility that the diesel oil would be unloaded into an underground tank for gasoline, and the gasoline and diesel oil would be mixed in the underground tank.

[0006] In order to prevent contamination accidents caused by mixing two liquids, for example, a coupler for each oil type is provided at the oil filler port of each underground tank, and a coupler for each oil type is installed on the oil supply hose during unloading. It is considered that an adapter for each type of oil can be installed. In this case, the oil supply hose can be connected to the oil filler port of the underground tank only when the oil type of the coupler on the underground tank side and the oil type of the adapter attached to the oil supply hose match.

[0007]

[Problems to be Solved by the Invention] However, conventionally, couplers for each type of oil are provided at the oil filling ports of underground tanks, so each time a worker unloads a tank, he or she has to attach an adapter corresponding to the type of oil to the coupler of the oil supply hose. There was a problem that the adapter had to be installed, and the work of installing the adapter was troublesome. Also,
Previously, it was up to the operator to decide which hatch to connect the oil supply hose to, so there was a risk of accidentally selecting a hatch with the wrong oil type when connecting the oil supply hose.
There was a problem that unloading operations were not reliable enough.

[0008] Furthermore, the present applicant has proposed an unloading system for tank lorries that solves the above-mentioned problems in Japanese Patent Application No. 150138/1999. This system is equipped with a valve lock that locks the oil supply valve for each hatch and a tank lock that locks the oil filler port of the tank at the delivery destination. It is designed to be taken out from a takeout machine.

However, with this proposed system, when unloading oil to a tank at a delivery destination, it is possible to prevent different oil types from being unloaded by mistake, but for example, if the same oil type is unloaded into multiple hatches, If it is loaded, when unloading the oil from each hatch, the oil destined for another destination may be unloaded.

[0010] In that case, if the tank capacity for delivery is different, for example, if the capacity of the tank is 2 kiloliters, the oil loaded in the hatch of 4 kiloliters may be unloaded, resulting in an overflow accident. Otherwise, there is a risk of insufficient unloading, where 2 kiloliters of oil loaded in a hatch is unloaded into a 4 kiloliter tank.

Therefore, the present invention provides a tank lorry unloading system that solves the above problems by making it possible to retrieve the valve lock for each hatch and the key for unlocking the tank lock for each delivery destination based on customer data. The purpose is to provide

0012

[Means for Solving the Problems] The present invention provides a method for loading oil into a tank lorry vehicle having a plurality of hatches into which oil is loaded and an oil supply valve provided in each of the plurality of hatches, and delivering the oil to a destination. In a tank lorry unloading system that opens the oil feed valve and unloads the oil in the hatch into the delivery destination tank, the plurality of oil feed valves are closed for each oil type. A plurality of valve locks are provided for each oil type, and a plurality of tank locks are provided for each oil type and each oil filler port lid is locked in a closed state for each oil type. A dedicated key formed to unlock the valve lock and tank lock corresponding to the oil type, and a first key that stores customer data including oil type data for each delivery destination in correspondence with each hatch. a storage medium, a second storage medium provided for each of the predetermined delivery destinations and storing oil type data for each tank for each delivery destination, customer data stored in the first and second storage media; A data reading means for reading oil type data, and comparing the customer data read by the data reading means with the oil type data,
The vehicle is equipped with a hatch corresponding to the type of oil to be unloaded from among the dedicated keys, and a key take-out machine for selectively taking out one dedicated key corresponding to the tank.

[0013]

[Operation] When unloading oil loaded on a tank truck, the data reader reads the customer data and oil type data from the first and second storage media, and the customer data and oil type data are read. After checking, a special key corresponding to the type of oil to be unloaded and corresponding to the hatch and tank is taken out from the key take-out machine, and this special key unlocks the lock for the tank and allows the connection of the oil supply hose. The valve lock can then be unlocked using the same special key and the cargo can be unloaded into the delivery tank. Therefore, it is possible to prevent incorrect connection of the oil supply hose using the same dedicated key, and it is also possible to prevent unloading of different oil types and capacities from hatches.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3 show an embodiment of a tank lorry unloading system according to the present invention.

The tank truck 1 shown in FIGS. 1 to 3 loads the ordered oil into a tank 2 at an oil depot, and then delivers the oil to the orderer.

The inside of the tank 2 is partitioned by a plurality of hatches, and in this embodiment, there are four hatches 2A, 2B, 2C,
It is assumed that 2D is provided. Also, hatch 2A is 4
kiloliter, hatch 2B is 2 kiloliter, hatch 2
C and 2D have different hatch capacities, such as 1 kiloliter.

The hatches 2A, 2B, 2C, and 2D are, for example, hatch 2A with a large hatch capacity for oil types that are frequently ordered, and hatch 2C with a small hatch capacity for oil types that are relatively rarely ordered.
, 2D, etc. are determined in advance.

Further, below the tank 2 of the tank lorry vehicle 1, oil feed ports 3A, 3 are provided for each hatch 2A, 2B, 2C, 2D.
B, 3C, 3D and oil feed valves 4A, 4B, 4C, 4D are provided. The oil feed valves 4A, 4B, 4C, and 4D normally remain closed.

The lorry vehicle 1 is always loaded with an oil feed hose 5, and when it arrives at the delivery destination, one end of the oil feed hose 5 is connected to one of the oil feed ports 3A, 3B, 3C, and 3D, and the other end is connected to one of the oil feed ports 3A, 3B, 3C, and 3D. It is connected to the oil filler port 7 of the underground tank 6 corresponding to the oil type.

As shown in FIG. 3, the upper part 2a of the tank 2 has oil fill ports 8A to 8D for loading oil into the hatches 2A to 2D, handles 9A to 9D for the oil feed valves 4A to 4D, and handles 9A to 9D for each of the oil feed valves 4A to 4D. Chain attachment seats 10A to 1 protruding near 9A to 9D
0D is provided.

[0021] Oil feed valve 4A~ provided at the bottom of tank 2
4D, the oil supply hose 5 is connected to the underground tank 6 as shown in FIG.
Oil filler port 7 and oil feeder port 3A corresponding to the oil type in the underground tank 6
~3D, the operator connects the upper part 2a of the tank 2.
The valve is opened by climbing up and rotating the handles 9A to 9D for the corresponding oil type. The oil in the hatches 2A to 2D is supplied to the oil feed valve 4.
The cargo is unloaded into the underground tank 6 by opening the valves A to 4D.

[0022] Handles 9A to 9D of each oil feed valve 4A to 4D
After oil is loaded into each hatch 2A to 2D at the oil depot, both ends are connected by valve locks 11 (11A to 11D) corresponding to the type of oil loaded, as shown in Figures 3 and 4. and the holes 10A1 to 10D of the chain attachment seats 10A to 10D.
The chain 12 inserted through the valve 1 locks the valve in the closed position so that it cannot rotate.

[0023] Valve locks 11 are provided for each type of oil,
Each hatch is painted in a predetermined color to make it easier to distinguish from the outside. For example, a valve lock 11A painted red is used for the gasoline hatch 2A, and a valve lock 11B painted white is used for the diesel oil hatch 2B. In addition, the kerosene hatch 2C has a blue valve lock 11C.
However, the yellow valve lock 11D is used for the heavy oil hatch 2D.

As shown in FIG. 5, the oil filling port 7 of the underground tank 6
The coupler 13 is normally closed by a lid 14, and the lid 1
4 is inserted into the connecting holes 13a, 14a of the coupler 13 and the lid 14, and is irremovably locked to the coupler 13 by a chain 25 connected at both ends to the tank lock 15 (15A to 15D). This tank lock 15 is also provided for each oil type, and is painted in a predetermined color for each oil type as described above.

That is, the tank lock 15A used for underground gasoline tanks is painted red, and the light oil tank lock 15B is painted white. The kerosene tank lock 15C is painted blue, and the heavy oil tank lock 15D is painted yellow.

As shown in FIGS. 6(A) to 6(D), in the tank lorry vehicle 1, dedicated keys 16A to 16D are provided for each type of oil. These keys 16
A to 16D are key parts 16A1 to 16D1 that are inserted into the key holes (not shown) of the valve locks 11A to 11D and tank locks 15A to 15D to unlock them, and magnets that form magnetic patterns for each oil type. 17 (indicated by a black circle in FIG. 6).

As shown in FIGS. 7 and 8, a key takeout machine 18 is installed in the driver's seat 1a of the tank truck 1 to selectively take out keys 16A to 16D corresponding to the type of oil when unloading work is carried out. .

This key extractor 18 is provided with key insertion slots 18A to 18D on the front surface 18a into which keys 16A to 16D are inserted in correspondence with the hatch numbers, and on the side surface 18b is a first memory such as a magnetic card or the like. Car number card 3 as a medium
1 (each hatch number, delivery destination for each hatch (customer no.
), Tank No. of delivery destination. , oil type for each hatch, loading data such as each loading amount) and a customer card 32 (tank number, tank capacity, oil type, customer card 32 provided at the delivery destination as a second storage medium) The card insertion slot 18E into which the card (in which the card number, etc. are stored) is inserted is open. In addition, key selection buttons 19A to 19D with indicator lights are provided below each of the key insertion slots 18A to 18D.

Further, below the card insertion slot 18E, there is a slip issuing button 27 that is operated after the unloading operation is completed, and unloading data (customer number, oil type, quantity, hatch number, etc.) is displayed by operating the slip issuing button 27. etc.) printed thereon, and a slip issuing port 29 for issuing a slip 28 (indicated by a dashed line in FIG. 7).

In addition to the key selection buttons 19A to 19D, the key extractor 18 also has a CPU 20 as shown in FIG.
A card reader 21 that reads information stored in the car number card and information stored in the customer card 32, and an alarm 2.
2, key ejection mechanisms 23A to 23D provided in the key insertion slots 18A to 18D, magnetic sensors 24A to 24D that read the oil type of each key 16A to 16D, and the key insertion slot 18.
Keys 16A to 16D provided and inserted in A to 18D
and a printer 30 that prints unloading data on the slip 29.

As will be described later, the CPU 20 includes a key verification means 20A for confirming that each of the keys 16A to 16D provided for each hatch is correctly inserted into the key insertion slots 18A to 18D for the corresponding oil type, and a key selection means The corresponding hatch key extraction mechanisms 23A to 23 are activated by operating the buttons 19A to 19D.
Key selection means 20B for operating D to select any key
and has.

The process executed by the CPU 20 during unloading work in the tank lorry unloading system configured as described above will now be described with reference to FIG.

First, after oil liquid of a predetermined oil type is loaded into each hatch 2A to 2D of the tank truck 1 at an oil depot, the oil supply valves 4A to 4D are opened as shown in FIGS. 3 and 4.
Each handle 9A to 9D has a chain 12 and a valve lock 11 for each type of oil.
A to 11D lock the valve in the closed position. The driver is given keys 16A to 16D as shown in FIGS. 6(A) to 6(D). Therefore, the driver must use keys 16A to 16A, which are dedicated to each oil type.
16D is inserted into the key insertion slots 18A to 18D of the key extraction device 18 shown in FIGS. 7(A) and 7(B) with corresponding hatch numbers. Each of the inserted keys 16A to 16D locks into a locking mechanism 25A to 25 in the key insertion slot 18A to 18D as described later.
D locks it in a state where it cannot be taken out.

[0034] In step S1 (hereinafter steps will be omitted), the CPU 20 converts the pattern of the magnet 7 provided on each key 16A-16D inserted into the insertion slot 18A-18D into the pattern provided on each key extraction mechanism 23A-23D. Detected by magnetic sensors 24A to 24D, each key 16A to 16
Read the oil type data of D.

Next, the car number card 31 is inserted into the card insertion slot 1.
8E is inserted into the card reader 21, the hatch number stored in the car number card 31 and the delivery destination for each hatch (
Customer No. ), the loading data such as the type of oil loaded into each hatch 2A to 2D and the loading amount are read (S2). and,
The oil type data indicated by the pattern of the magnet 7 obtained in S1 above is compared with the oil type data included in the loading data of the vehicle number card 31 obtained in S2 (S3), and both oil type data match. (S4).

In S4, if the oil type of each key 16A-16D matches the oil type of the key insertion slot 18A-18D of hatch 2A-2D and each key 16A-16D is inserted correctly, the process moves to S5 and the key is inserted. The process waits until the selection buttons 19A to 19D are operated.

Incidentally, in step S4, the driver accidentally inserts the keys 16A to 16D into the key insertion slot 1 of the hatch for a different type of oil.
8A to 18D, the oil type in the loading data and the oil type data on the key do not match, and the process moves to S14, where the lock mechanisms 25A to 25A in the key insertion slots 18A to 18D that do not match are inserted.
25D is released and the key extraction mechanism 23A~
Keys 16A to 16 incorrectly inserted when operating 23D
D is ejected from the key insertion slots 18A to 18D. and,
The alarm device 22 emits an alarm sound to notify the driver (S1
5).

In this case, the driver performs the insertion operation of each key again. Therefore, the keys 16A to 16D that match the oil type of each of the hatches 2A to 2D are definitely inserted into the key insertion openings 18A to 18D provided for each of the hatches 2A to 2D. Therefore, it is reliably prevented that a key for a different oil type is taken out during unloading work.

When each of the keys 16A to 16D is correctly inserted into the key insertion slots 18A to 18D in this manner, the driver leaves the tank truck 1 and leaves the oil depot.

When the tank truck 1 arrives at the destination gas station, the driver inserts the destination customer card 32 into the card insertion slot 18E of the key takeout machine 18. When the customer card 32 is inserted into the card insertion slot 18E (S5
), the customer number stored in the customer card 32 by the card reader 21. , Tank No. , tank capacity, oil type, and other customer data are read (S6).

[0041] In the next S7, the above customer data and the S2
It is compared with the loading data of the vehicle number card 31 that has been read and stored. When the oil type data of both data match, the indicator light of the key selection button 19A to 19D of the hatch number corresponding to the oil type and quantity of the loading data is turned on (S8).

When unloading gasoline into the underground tank 6 of the gas station, the driver presses the illuminated key selection button 19A of the gasoline hatch 2A. When the key selection button 19A is pressed in S9, the locking mechanism 25A is unlocked and the key extraction mechanism 23A corresponding to the hatch 2A is driven, so that the key 16A inserted into the key insertion slot 18A can be extracted. (S10).

Using the key 16A taken out from the key takeout machine 18 in this way, the driver unlocks the tank lock 15A of the underground tank 6, removes the chain 25, opens the lid 14, and starts pumping oil. Connect the hose 5 to the gasoline filler port 7 and the filler port 3A of the hatch 2A.

Next, the driver ascends to the upper part 2a of the tank 2, uses the same key 16A to unlock the valve lock 11A near the fuel filler port 8A of the hatch 2A, and removes the chain 12. Then, by rotating the handle 9A, the fuel feed valve 4A of the hatch 2A is opened, and the gasoline in the hatch 2A is unloaded into the underground tank 6.

[0045] In S11, the key extraction data and the loading data are checked to see if the unloading of oil from all the hatches 2A to 2D has been completed, and if there is still oil remaining, the process returns to S9 and the above S9 is performed. The processes from ~S11 are repeated.

[0046] When the unloading work for all types of oil is completed, the driver presses the slip issue button 27. Therefore, when the slip issuing button 27 is pressed in S12, the printer 30 records the unloaded oil type, quantity, and customer number. , Hatch No.
, time, etc. are printed on the slip 28, and the slip 28 is issued from the slip issuing port 29 (S13). Therefore, by checking the data printed on the slip 28 after unloading, it is possible to confirm to the customer who placed the order that the oil type and quantity ordered have been unloaded.

In this way, the key dedicated to the hatch is taken out from the key takeout machine 18 and the valve lock 11A and tank lock 15A are unlocked, so that the oil supply hose 5 has the same oil type and hatch capacity. A handle 9 for the oil type that can connect the hatches 2A to 2D and the underground tank 6 and to which the oil supply hose 5 is connected.
Only valves A to 9D can be opened. Therefore, accidents such as unloading different types of oil into the underground tank 6 can be prevented.

For example, suppose that when the driver operates the key take-out device 18, he accidentally presses the light oil key selection button 9B to unload gasoline. In this case, although the light oil key 16B is taken out, it is possible to prevent an accident in which the tank lock 15A and the valve lock 11A cannot be unlocked and the light oil is unloaded into the underground gasoline tank 6.

Furthermore, when the driver mistakenly inserts the light oil key 16B into the tank lock 15A due to the color of the key taken out from the key extractor 18, it is obvious at a glance because the key 16B is white and the tank lock 15A is red. It is. Therefore,
The driver noticed the erroneous operation based on the color of the keys 16A to 16D, and operated the key ejector 18 again to remove the underground tank 6.
The correct key 16A to 16D corresponding to the type of oil can be taken out.

It is also conceivable that the driver accidentally stops the lorry 1 in an underground tank for light oil when unloading gasoline. In this case as well, since the gasoline key 16A is taken out from the key take-out machine 18, the gas oil tank lock 15B cannot be unlocked, and an accident of mixing two liquids can be prevented.

[0051] Furthermore, in the unlikely event that the lorry vehicle is stopped at an underground tank for light oil despite an order for gasoline, and the key 16B for light oil is taken out, the light oil is stored in the underground tank for light oil. This will prevent accidents such as mixing of the two liquids.

In the above description, different types of oil are loaded into each of the hatches 2A to 2D, but the same type of oil may be loaded into each of the hatches 2A to 2D depending on an order from a customer. For example, customer A orders 4 kiloliters of gasoline and 1 kiloliter of diesel oil, and another customer B orders 2 kiloliters of gasoline.
Suppose there is an order for 1 kiloliter of diesel oil. When delivering to customers A and B using one tank truck 1, 4 kiloliters of gasoline for customer A is loaded into hatch 2A at the oil depot, and 2 kiloliters of gasoline for customer B is loaded into hatch 2B. loaded. Furthermore, 1 kiloliter of diesel oil for customer A was loaded into hatch 2C.
One kiloliter of diesel oil for customer B is loaded into hatch 2D. This loading data for each of the hatches 2A to 2D is stored in a vehicle number card, and is read into the card reader 21 in the above S2 (see FIG. 9). Then, when the tanker truck 1 arrives at customer A and inserts the customer card 32 into the card insertion slot 18E, customer A's customer No. , tank N
o. , the type of oil in the tank, the capacity of the tank, and other customer data are read by the card reader 21 .

Then, in S8, the key selection buttons 19A and 19C of the valve locks 15A and 15C provided in the hatches 2A and 2C for customer A are lit. Therefore, as described above, the driver presses the illuminated key selection buttons 19A, 19C, takes out the keys 16A, 16C, and selects the hatch 2.
Carry out unloading work of oil fluids A and 2C.

[0054] Therefore, it is possible to avoid accidentally unloading the oil of customer B who ordered the same type of oil at customer A.
Inconveniences such as unloading less than the amount ordered by customer A can be prevented. Further, it is also possible to prevent customer A's oil from being erroneously unloaded at customer B, thereby preventing an accident such as unloading more oil than customer B ordered and causing an overflow.

In the above embodiment, the chains 12, 25 and the valve lock 11
Since the handles 9A to 9D and the lid 14 of the oil filler port 7 are locked in combination with A to 11D and tank locks 15A to 15D, it is easy to modify the tank truck 1 and the gas station and is inexpensive. The configuration increases the safety of unloading operations.

In the above embodiment, the handles 9A to 9D and the lid 14 are locked using the chains 12, 25, etc., but the lock is not limited to this, and locks that lock the shafts of the handles 9A to 9D may also be used. Alternatively, it is of course possible to provide a lock that connects the lid 14 directly to the coupler 13.

Furthermore, in the above embodiment, the C in the key extractor 18
Although the PU 20 is provided with a key verification means 20A and a key selection means 20B, the key extraction device 18 has at least a key selection button 19.
It suffices if the configuration is such that only one of the oil type dedicated keys 16A to 16D can be taken out by operating A to 19D.

[0058] Tank No. A display may be provided to indicate the tank at the gas station. In this case, it is possible to prevent the same type of oil from being unloaded into different tanks.

[0059]

Effects of the Invention As described above, the tank lorry unloading system of the present invention locks the oil supply valve in the closed state with the valve lock provided for each hatch, and locks the oil supply valve in the closed state with the tank lock. The lid of the tank is locked, and the valve lock and tank lock for the oil type can be unlocked using the special hatch key selected from the key take-out machine, so the oil supply hose can be connected to a tank of a different oil type. It is possible to reliably prevent accidents such as mixing two liquids in a tank by accidentally opening an oil feed valve for a different type of oil.

Furthermore, in order to compare the customer data stored in the first storage medium with the oil type data stored in the second storage medium and select the key with the matching oil type, different customer A , even if an order for the same type of oil is received from B, it is possible to prevent the situation where the oil is delivered to customer A by mistake and unloaded to customer B when delivered using one lorry, and the oil type is matched. It is possible to prevent accidents such as the quantity unloaded is different even if the quantity ordered is small, complaints occur because the quantity ordered is small, or an overflow accident occurs when the quantity is larger than the ordered quantity.

[0061] Furthermore, even if the wrong key is selected, the valve lock and tank lock cannot be unlocked, so mixing of the two liquids can be prevented, increasing the safety of unloading work, and reducing unloading work. It has features such as being able to increase reliability.

[Brief explanation of the drawing]

FIG. 1 is a side view of a tank truck applied to an embodiment of a tank truck unloading system according to the present invention.

FIG. 2 is a diagram showing a state in which an oil supply hose is connected to a tank truck and an underground tank.

FIG. 3 is a plan view of the tank truck.

FIG. 4 is an enlarged view showing a state in which the handle of the oil feed valve is locked.

FIG. 5 is an enlarged cross-sectional view showing a state in which the lid of the underground tank is locked.

FIG. 6 is a plan view showing dedicated keys for each hatch.

FIG. 7 is a diagram for explaining a key retrieval machine.

FIG. 8 is a configuration diagram of a key retrieval machine.

FIG. 9 is a flowchart for explaining processing executed by a CPU.

[Explanation of symbols]

1 Tank truck 2 Tanks 2A-2D Hatch 3A-3D Oil feed port 4A-4D Oil feed valve 5 Oil feed hose 6 Underground tank 7 Oil fill port 9A-9D Handle 10A-10D Chain mounting seat 11 (11A-11D) Valve lock 12, 25 Chain 13 Coupler 14 Lid 15, (15A to 15D) Tank lock 16A to 16
D Key 17 Magnet 18 Key extraction device 19A-19D Key selection button 20A Key verification means 20B Key selection means 21 Card reader 22 Alarm 23A-23D Key extraction mechanism 24A-24D Magnetic sensor 25A-25D Lock mechanism, slip issuing button 27, 30
printer

Claims (1)

[Claims] Claim 1: The oil is loaded onto a tank truck that has a plurality of hatches into which the oil is loaded and an oil feed valve provided in each of the hatches, and the oil feed valve is opened at the delivery destination. In a tank lorry unloading system that unloads oil liquid in a hatch into a tank at a delivery destination by using a valve, a plurality of valve locks lock the plurality of oil supply valves in a closed state for each type of oil;
a plurality of tank locks for locking the lid of the oil filler port of each tank provided at the delivery destination in a closed state for each oil type; and the valve lock provided for each oil type and corresponding to each oil type. a dedicated key formed to unlock a tank lock; a first storage medium for storing customer data including oil type data for each delivery destination in correspondence with each hatch; and a first storage medium for storing customer data including oil type data for each delivery destination; a second storage medium for storing oil type data for each tank at the delivery destination; a data reading means for reading customer data and oil type data stored in the first and second storage media; A key extraction machine that collates the customer data read by the data reading means with the oil type data and selectively takes out one dedicated key corresponding to the hatch and tank corresponding to the oil type to be unloaded from among the dedicated keys. A tank truck unloading system characterized by comprising the following.