JP2002231578A - Device and tool for fitting electrolytic capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that operability becomes worse and a long time is required for the replacement of a capacitor since an electrolytic capacitor used for an inverter device, etc., is arranged in a narrow part. SOLUTION: A bolt of which the height is specified is fitted to a connection terminal of the electrolytic capacitor across a spring and a washer. The bolt is made to penetrate a conductor having a bored insertion hole having a lock part from its head part side and moved to the lock part, so that the conductor is held while pressed in contact between the bolt head part and washer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting device for an electrolytic capacitor used in a power converter or the like, and more particularly to a mounting device and a tool for simplifying maintenance work.

[0002]

2. Description of the Related Art Inverters used as power converters, for example, for variable speed control of motors, include a cooling fan, an electrolytic capacitor,
Parts having a failure element such as a speed sensor are used. These parts require maintenance,
Sometimes replacement is required. Particularly, an electrolytic capacitor, a speed sensor, and the like greatly contribute to the performance of the inverter, and when these components fail, quick replacement is required.

[0003]

When an electrolytic capacitor is replaced, a complicated operation is required, and the replacement takes time. In other words, the electrolytic capacitor itself is screwed with a bolt, and the connection between the electrolytic capacitor and the conductor is fixed by screwing the bolt to the screw part provided at the terminal of the electrolytic capacitor, so that the working time is reduced. There are restrictions on the increase and structural arrangement. In addition, there is a problem that the hot-line work cannot be performed due to the screwing, and the power must be turned off once.

An object of the present invention is to provide a mounting device and a tool for facilitating a replacement operation.

[0005]

A first aspect of the present invention is to mount an electrolytic capacitor used as a power circuit component, wherein the electrolytic capacitor is held by a holding plate and provided at a connection terminal of the electrolytic capacitor. A bolt having a receiving seat and a spring inserted therein is screwed into the screw portion while maintaining a predetermined height, and the conductor attached to the connection terminal of the electrolytic capacitor has a diameter larger than the head of the bolt. An insertion hole in which a hole and a cutout having a smaller diameter than the bolt head are provided continuously, and a conductor attached via the insertion hole between the bolt head and the seat is provided. It is.

A second aspect of the present invention is characterized in that a band having a contact portion is attached to the electrolytic capacitor, and the electrolytic capacitor is held in contact with the band contact portion and the holding plate. It is.

[0007] A third aspect of the present invention is that an interposition bolt having a screw portion screwed to the head is screwed into the connection terminal of the electrolytic capacitor, and a bolt into which a receiving seat and a spring are inserted is inserted into the interposition bolt. The conductor is screwed while maintaining a predetermined height, and the conductor is disposed between the head portion of the intervening bolt and the seat through an insertion hole.

A fourth aspect of the present invention is characterized in that a drop-off prevention pin is provided on a conductor near a communicating portion between the hole and the cutout.

A fifth aspect of the present invention is a fitting portion having a cylindrical shape having an inner diameter substantially the same as the outer diameter of the electrolytic capacitor, in which a non-slip member is provided, and which is attached to the outside of the fitting portion. A tool is provided with the provided handle.

[0010]

FIG. 1 is a block diagram showing an embodiment of the present invention. 1 is an electrolytic capacitor, 2 is a connection terminal planted on the upper surface of the capacitor, and two connection terminals for a positive electrode and a negative electrode are provided. Have been. A screw portion is screwed into the connection terminal 2 of each pole. Reference numeral 3 denotes a bolt which is screwed with the connection terminal 2 of each pole. Reference numeral 4 denotes a receiving seat, and 5 denotes a spring. These are inserted into the bolt 3 in the order of the receiving seat 4 and the spring 5, and attached to the connection terminal 2 of each pole together with the bolt. The bolt 3 is screwed into the head 3a so as to be at the upper surface position of the connection terminal 2 or at a predetermined height.

The predetermined height is determined so that the conductor can be sufficiently contacted with the bolt head 3a by the repulsive force of the spring 5 when a conductor described later is attached. The conductor 6 connects the other circuit components to the capacitor, and has a positive electrode and a negative electrode.
Are drilled. The insertion hole 7 has a diameter d of the bolt head 3a.
_The insertion hole 7a having a diameter larger than ₁ and the bolt 3
And a lock portion 7b having a diameter slightly larger than the outer diameter d2 of the first and _second portions, and a drop-prevention pin 8 is fixed near a neck portion where the two are continuous.

FIG. 2 shows a holding portion of the capacitor. Reference numeral 9 denotes a band, and a plurality of projecting contact portions 9a are provided on an arbitrary portion thereof and wound around the capacitor 1, and fixed by bolts and nuts. Is done. Reference numeral 10 denotes a holding plate. The holding plate 10 has a hole 10a for passing the capacitor 1,
And a notch portion 10b sized to penetrate the contact portion 9a provided in the contact portion 9a. One end of the holding plate 10 is fixed at a position not shown. When attaching the capacitor 1 to the hole 10a, the band 9 is wound around the capacitor slightly below the hole after the capacitor is inserted and fixed to the capacitor 1 with fixing members such as bolts and nuts. Then, the position of the contact portion 9a and the notch 10b provided in the holding plate 10
Band 9 by inserting a capacitor
Is located below the holding plate 10. By slightly rotating the condenser 1 in this state, the contact portion 9a and the notch 1
The position of 0b moves, the contact portion 9a engages with the holding plate 10, and the capacitor is held without falling out.

When the conductor 6 is mounted on the electrolytic capacitor 1 with the bolt 3, the receiving seat 4 and the spring 5 mounted on the connecting terminal 2, the insertion hole 7 is inserted. The bolt head 3a is passed through the hole 7a, which is the position, and the conductor 6 is passed over the fall-off prevention pin 8 so that the bolt 3 is fitted into the lock portion 7b when the conductor 6 is located between the bolt head 3a and the seat 4. The position of the conductor 6 is moved and adjusted. Thus, the conductor 6 presses the conductor 6 toward the bolt head 3a via the receiving seat 4 by the repulsive force of the elasticity of the spring 5, and the contact pressure connects the bolt and the conductor mechanically and electrically. Is done.

FIG. 3 shows another embodiment.
Is an intervention bolt, a relatively short bolt is used,
A screw portion 11b is screwed on the head 11a. The bolt 11 is connected to the connection terminal 2 of each pole of the electrolytic capacitor 1.
Screwed. Head 11 of screwed intervention bolt 11
Further, a bolt 3 is inserted and screwed into the spring 5 and the receiving seat 4 in this order, and the heads of both bolts are maintained and fixed at a predetermined height position. The rest is configured similarly to FIG.

In FIG. 3, when the conductor 6 is mounted in a state where the bolt 3, the receiving seat 4, and the spring 5 are mounted on the connection bolt 2 on the connection terminal 2, an insertion hole provided in the conductor insertion hole 7 is provided. The bolt head 3a and the seat 4 through the hole 7a, and the conductor 6 is connected to the seat 4 and the head 1 of the intervening bolt.
The conductor 6 is moved over the falling-off prevention pin 8 so that the bolt 3 is fitted into the lock portion 7b when it is located between 1a. As a result, the conductor 6 is moved by the repulsive force of the spring 5 through the seat 4 to the head 11a of the intervening bolt.
Side, the intervening bolt 11 and the conductor 6 are mechanically and electrically connected.

In FIGS. 1 and 3, when the electrolytic capacitor 1 is removed for replacement, it is performed by moving the conductor 6 against the elastic force of the spring 5.
At this time, the electrolytic capacitor 1 itself moves when the conductor 6 gets over the falling-off prevention pin 8, but the contact portion 9 a of the band 9 prevents the capacitor from floating.

FIG. 4 shows a tool used when handling the electrolytic capacitor 1. In general, the location of the electrolytic capacitor in an inverter device or the like is located in a narrow portion, and there is no handle for handling the capacitor itself. Therefore, workability at the time of replacement is poor. The tool 20 shown in FIG. 4 is used when attaching and detaching the electrolytic capacitor 1. The tool 20 includes a fitting portion 21
And a handle 22. The fitting portion 21 is formed in a cylindrical shape having an inner diameter slightly larger than the outer diameter of the electrolytic capacitor 1, and has a non-slip member 23 made of rubber or the like disposed therein.

At the time of mounting and removing the electrolytic capacitor, the capacitor and the tool are integrated by firmly fitting the tool 20 from the upper portion of the capacitor 1 without the conductor 6, and the holding plate is operated by operating the handle 22. For example, the condenser 1 can be rotated to extract it from the position 10.

[0019]

As described above, according to the present invention, the connection between the connection terminal of the capacitor and the conductor is made by the repulsive force of the spring, so that the screwing work as in the prior art is unnecessary. In a short time, with good workability,
It can be removed. Also, the capacitor can be held by simply inserting the lower part of the hole into the hole provided in the holding plate and turning it slightly, so that the capacitor can be easily attached and detached, and the operation uses a special tool. Accordingly, the work can be easily performed, and the user who does not have a tool cannot perform attachment and detachment, so that easy handling cannot be performed and safety can be enhanced. Furthermore, since the connection terminal is covered with a tool when the capacitor is removed, even an electrolytic capacitor having a long discharge time can be safely handled without touching the charged portion.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a conductor mounting of an electrolytic capacitor showing an embodiment of the present invention.

FIG. 2 is a mounting configuration diagram of the electrolytic capacitor of the present invention.

FIG. 3 is a configuration diagram of a conductor mounting of an electrolytic capacitor showing another embodiment of the present invention.

FIG. 4 is a configuration diagram of the electrolytic capacitor handling tool of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electrolytic capacitor 2 ... Connection terminal 3 ... Bolt 4 ... Receiving seat 5 ... Spring 6 ... Conductor 7 ... Insertion hole 8 ... Dropping prevention pin 9 ... Band 10 ... Retention plate 11 ... Intervening bolt 20 ... Tool 21 ... Mating Part 22: Handle 23: Slip member

Claims (5)

[Claims] An electrolytic capacitor used as a power circuit component is mounted on the electrolytic capacitor. The electrolytic capacitor is held by a holding plate, and a receiving portion and a spring are mounted on a screw portion provided at a connection terminal of the electrolytic capacitor. The inserted bolt is screwed in while maintaining a predetermined height, and an insertion hole having a diameter larger than the head of the bolt and a smaller hole than the head of the bolt are inserted into a conductor attached to the connection terminal of the electrolytic capacitor. An installation device for an electrolytic capacitor, comprising: an insertion hole provided with a lock portion having a diameter; and a conductor mounted between the bolt head and the seat via the insertion hole. 2. The electrolytic solution according to claim 1, wherein a band having a contact portion is attached to said electrolytic capacitor, and said electrolytic capacitor is held in contact with said band contact portion and said holding plate. Capacitor mounting device. 3. A connecting terminal of the electrolytic capacitor is screwed with an intervening bolt having a threaded head portion, and a bolt having a receiving seat and a spring inserted into the intervening bolt is maintained at a predetermined height. 3. The electrolytic capacitor mounting apparatus according to claim 1, wherein the conductor is disposed between the head of the intervening bolt and the seat through an insertion hole. 4. The electrolytic capacitor mounting device according to claim 1, wherein a pin for preventing falling is provided in a conductor near a communicating portion between the hole and the lock portion. 5. A fitting part having a cylindrical shape having an inner diameter substantially the same as the outer diameter of the electrolytic capacitor and having a non-slip member disposed therein, and a handle mounted outside the fitting part. 5. The tool according to claim 1, wherein the tool is configured by using
Tools for handling electrolytic capacitors as described.