JP2002151345A - Reverse mount preventing structure for aluminum electrolytic capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of a workman having to watch the direction of connection (polarity) carefully, when an aluminum electrolytic capacitor is connected, and long man-hours are needed for ascertaining the connections of the capacitors, so that productivity is reduced. SOLUTION: An aluminum electrolytic capacitor mounting board and an aluminum electrolytic capacitor mounting fitting are structured so that a part of the capacitor mounting board is brought into contact with a part of the capacitor-mounting fitting, to make an electrolytic capacitor unable to be connected, when the electrolytic capacitor is connected in reverse polarity. Or the mounting fitting is made to be bilaterally asymmetrical, so that the electrolytic capacitor connection cannot be made, when it is connected reverse in polarity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting bracket for mounting an aluminum electrolytic capacitor and a mounting structure of a mounting plate, and more particularly to a method of preventing reverse mounting in which an incorrect mounting direction can be easily recognized when mounting an aluminum electrolytic capacitor. Regarding the structure adopted.

[0002]

2. Description of the Related Art A medium-sized and large-sized aluminum electrolytic capacitor 1 as shown in FIG. 1 other than a self-supporting aluminum electrolytic capacitor mounted on a substrate is provided with a mounting bracket 2 so as to be mounted on a device. Since the two mounting feet 15 provided in the mounting bracket 2 have a symmetrical shape,
Even when turned in the direction rotated by 0 degrees, it can be attached. However, in the aluminum electrolytic capacitor 1, the terminals of the electrodes have polarity, and when the electrodes are connected in reverse, the internal pressure increases due to gasification of the insulating oil and the like inside the capacitor, and the safety valve operates. As a result, the function as a capacitor is lost.

[0003] If the safety valve does not operate normally, the aluminum electrolytic capacitor 1 may be exploded or ignited. In general, the insulating oil inside the capacitor is flammable.

Further, in an inverter device, a plurality of aluminum electrolytic capacitors 1 are usually connected in parallel or in series, but if one of the electrodes is installed with the polarity reversed, it will be used for a short time. In this case, since the device performs a normal operation, it is difficult to find a device that is reversely mounted.
In addition, it cannot be found with a general tester.

[0005] This problem has been prevented by repeated checks by the operator. For this reason, in some cases, the aluminum electrolytic capacitor 1 may explode, ignite, or break other parts of the device.

[0006]

In the above prior art, no consideration is given to a method for preventing the reverse connection of the aluminum electrolytic capacitor 1, and there is a problem described below.

When the aluminum electrolytic capacitor 1 is turned upside down, the internal pressure increases due to gasification of the insulating oil and the like inside the capacitor, and the safety valve operates. As a result, the function as a capacitor is lost. The aluminum electrolytic capacitor 1 has a problem that there is no method for preventing the function as a capacitor from being lost when the polarity of the electrodes is reversed.

Furthermore, when connecting the aluminum electrolytic capacitor 1, care must be taken in the connection direction, and after the mounting, a large number of work steps are required, such as performing further confirmation, thus causing a problem of hindering productivity. Was.

Further, the aluminum electrolytic capacitor 1
Is a regular replacement component (life component) in an inverter device, and therefore, a person who does not particularly have knowledge of the device may attach and detach the aluminum electrolytic capacitor 1 for replacement. At this time, there is a problem that it takes a long time to work because many work steps such as paying attention to the mounting direction of the aluminum electrolytic capacitor 1 and further confirming the operation occur.

Further, there is a method using a film capacitor as a method not using the aluminum electrolytic capacitor 1 so that there is no problem even if the polarity of the electrode is reversely connected when assembling the capacitor into the device. However, the film capacitor has a problem that the price is expensive and the size is large.

Furthermore, when assembling the aluminum electrolytic capacitor 1 into an apparatus, a method of preventing the polarity reversal of the electrode of the aluminum electrolytic capacitor 1 by assembling using an assembling jig can be considered. There was a problem that had to be removed.

[0012]

SUMMARY OF THE INVENTION The object of the present invention is to provide an aluminum electrolytic capacitor mounting plate and a mounting bracket for an aluminum electrolytic capacitor in a case where electrodes are to be mounted in a state where the polarities of the electrodes are opposite to each other. If a part of the mounting bracket of the capacitor comes in contact and the aluminum electrolytic capacitor cannot be mounted, or if the mounting feet are asymmetrical and mounting is attempted with the polarity of the electrode reversed, mount it on the mounting plate. This is achieved by making the structure impossible to connect, or by making the shape of each connection terminal different from each other and making it impossible to connect to the connection terminal in the case where the polarity of the electrode is reversed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A structure for preventing reverse mounting of an aluminum electrolytic capacitor according to the present invention will be described below in detail with reference to the illustrated embodiment.

FIG. 2 shows an embodiment in which a structure for preventing reverse mounting of an aluminum electrolytic capacitor according to the present invention is embodied. In these figures, 1 is an aluminum electrolytic capacitor, 2 is a capacitor mounting bracket of the aluminum electrolytic capacitor, 3 is a capacitor mounting plate of the aluminum electrolytic capacitor 1, 4 is a projection provided on the capacitor mounting plate 3, and 5 is a screw. A hole 6 is formed in the capacitor mounting plate 3 so that the aluminum electrolytic capacitor 1 penetrates. A capacitor mounting bracket 2 is mounted on the aluminum electrolytic capacitor 1. In order to fix the capacitor mounting bracket 2 to the aluminum electrolytic capacitor 1, a bellows 7 protrudes from one place, and is fixed so as to be tightened. Screw it to the capacitor mounting plate 3
Fix using. The mounting feet of the capacitor mounting bracket 2 are bilaterally symmetric. Therefore, the capacitor mounting plate 3
If there is no projection 4 provided in the above, it can be mounted in either direction by rotating it 180 degrees. However, since the capacitor 2 is attached to the aluminum electrolytic capacitor 1, when the capacitor is attached, as shown in FIGS. 3 and 4, the projection 7 comes into contact with the projection 4 provided on the capacitor attaching plate 3. Since it is inclined, it cannot be fixed with the screw 5. At the regular position, the bellows 7 do not come into contact with the projections 4 provided on the capacitor mounting plate 3 and can be fixed with the screws 5. For this reason, it is possible to prevent the electrodes of the aluminum electrolytic capacitor 1 from being mounted with the polarities reversed.

FIG. 5 shows another embodiment in which the structure for preventing reverse mounting of the aluminum electrolytic capacitor 1 according to the present invention is embodied. A capacitor mounting bracket 17 is mounted on the aluminum electrolytic capacitor 1, and the capacitor mounting bracket 17 is left-right asymmetric for the purpose of preventing reverse mounting of the electrode polarity. For this reason, when rotated by 180 degrees, it cannot be fixed to the capacitor mounting plate 3 of FIG. For this reason, it is possible to prevent the electrodes of the aluminum electrolytic capacitor 1 from being mounted with the polarities reversed.

FIG. 6 shows another embodiment in which a structure for preventing reverse mounting of the polarities of the electrodes of the aluminum electrolytic capacitor 1 according to the present invention is embodied. A capacitor mounting bracket 9 is mounted on the aluminum electrolytic capacitor 1,
The capacitor mounting bracket 9 is provided with an M4 screw hole mounting bracket 10 on one side and an M5 screw mounting bracket 11 on the other side for the purpose of preventing reverse mounting. For this reason, when it is rotated by 180 degrees, it cannot be fixed to the capacitor mounting plate 3 of FIG. 2 using the same screw, so that it is prevented that the electrodes of the aluminum electrolytic capacitor 1 are mounted with the polarity reversed. Can be done.

FIG. 7 shows another embodiment in which a structure for preventing reverse mounting of the aluminum electrolytic capacitor 1 according to the present invention is embodied. The polarity of the electrodes of the aluminum electrolytic capacitor 1 is reversed even when the aluminum electrolytic capacitor 1 is positioned or stopped for rotation by aligning the part of the bellow 7 with the positioning metal fitting 12 provided on the capacitor mounting plate 3. It can be prevented from being mounted in a state.

FIG. 8 shows another embodiment in which the structure for preventing reverse mounting of the aluminum electrolytic capacitor 1 according to the present invention is embodied. The terminals of the aluminum electrolytic capacitor 1 are separated from the M4 screw terminals 13 and the M5 screw terminals 14, respectively, so that the electrodes of the aluminum electrolytic capacitor 1 can be connected when the electrodes of the aluminum electrolytic capacitor 1 are mounted so as to have opposite polarities. Since it is not possible to connect a wiring or the like to the aluminum electrolytic capacitor 1, it is possible to prevent the aluminum electrolytic capacitor 1 from being mounted with the polarity of the electrode reversed.

[0019]

According to the present invention, the reverse mounting of the aluminum electrolytic capacitor can be prevented. Further, even if the aluminum electrolytic capacitor is erroneously mounted in reverse, the aluminum electrolytic capacitor cannot be fixed to the capacitor mounting plate, so that an operator can notice at the time of mounting. For this reason, damage and ignition of the aluminum electrolytic capacitor can be prevented.

[Brief description of the drawings]

FIG. 1 is an example of a fitting for mounting an aluminum electrolytic capacitor.

FIG. 2 is an embodiment (perspective view) of the present invention.

FIG. 3 is an embodiment (front view) of the present invention.

FIG. 4 is an embodiment (left side view) of the present invention.

FIG. 5 is another embodiment of the present invention.

FIG. 6 is another embodiment of the present invention.

FIG. 7 is another embodiment of the present invention.

FIG. 8 is another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Aluminum electrolytic capacitor, 2 ... Aluminum electrolytic capacitor mounting bracket, 3 ... Capacitor mounting plate, 4 ... Protrusion provided on the capacitor mounting plate, 5 ... Fixing screw, 6 ... Through-hole on the capacitor mounting plate, 7
… The bellows of the aluminum electrolytic capacitor mounting bracket,
8 ... Mounting bracket for aluminum electrolytic capacitor (another example), 9 ... Mounting bracket for aluminum electrolytic capacitor (another example), 10 ... Mounting foot for M4 screw hole, 11
... Mounting foot for M5 screw, 12 ... Positioning bracket,
13 ... Terminal for M4 screw of aluminum electrolytic capacitor, 14 ... Terminal for M5 screw of aluminum electrolytic capacitor, 15 ... Mounting foot, 17 Capacitor mounting bracket.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor, Mutsumi Tokashiki 7-1-1, Higashi-Narashino, Narashino-shi, Chiba Inside Hitachi Drive Systems Co., Ltd. (72) Inventor Shuichi Sekiguchi 7-1-1, Higashi-Narashino, Narashino-shi, Chiba Stock Hitachi Drive Systems, Inc. (72) Inventor Naoki Takada 7-1-1 Higashi Narashino, Narashino City, Chiba Prefecture Inside Hitachi Drive Systems, Ltd.

Claims (3)

[Claims] In a mounting structure for mounting an aluminum electrolytic capacitor with a mounting bracket to a mounting plate, when an attempt is made to mount the aluminum electrolytic capacitor in a state in which the polarity of the electrode of the aluminum electrolytic capacitor is reversed, a part of the mounting bracket of the aluminum electrolytic capacitor and the mounting bracket are connected to each other. A structure for preventing reverse mounting of an aluminum electrolytic capacitor, wherein a part of the mounting plate is in contact and cannot be mounted. 2. A mounting structure for mounting an aluminum electrolytic capacitor with a mounting bracket on a mounting plate, wherein the mounting bracket of the aluminum electrolytic capacitor is formed symmetrically on the left and right sides, and the electrodes of the aluminum electrolytic capacitor are mounted with the polarities of the electrodes reversed. An aluminum electrolytic capacitor reverse mounting prevention structure, wherein the aluminum electrolytic capacitor is not mounted on the mounting plate. 3. The mounting structure for mounting an aluminum electrolytic capacitor with a mounting bracket on a mounting plate, wherein the polarity of the electrodes of the aluminum electrolytic capacitor is changed by the fact that the screws at the + and-terminal portions of the electrodes of the aluminum electrolytic capacitor have different sizes. A structure for preventing reverse mounting of an aluminum electrolytic capacitor, wherein connection cannot be made when mounting is attempted in a reverse state.