JPS6258202B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a draw-out type high voltage electromagnetic contactor.

High-voltage electromagnetic contactors are generally known as devices that open and close circuits for controlling the operation of high-voltage motors and other various high-voltage circuits, and there are draw-out type high-voltage electromagnetic contactors. This draw-out type high-voltage magnetic contactor is usually installed in or close to a high-voltage circuit, and is configured so that it can be pulled out from the high-voltage circuit to facilitate maintenance and inspection work. There are structures shown in FIGS. 1 and 2. The general structure of this drawer-type high-voltage magnetic contactor is that multiple frames are assembled, each component is supported by these frames, and wheels are attached to the lower part of the frames. It is designed to be portable. In the figure, reference numeral 1 denotes a rectangular lower frame, and this lower frame 1 is composed of four frames, front, rear, left and right. These four frames are a lower front frame 2, a lower rear frame (not shown), a lower left frame 3, and a lower right frame 4. Wheels 5 are provided at the front and rear of each of the lower left frame 3 and the lower right frame 4. At the four corners of the lower frame 1, four side frames (only the front left side frame 6 is shown in the figure) are attached perpendicularly to the lower frame 1. Handles 7, 7 are attached to both front frames among these four side frames. As mentioned above,
When this drawer-type high-voltage electromagnetic contactor is to be separated from the high-voltage circuit for maintenance or inspection, the handles 7, 7 are pulled and the wheels 5 are rolled to pull it out. Further, a side left center frame 8 and a side right center frame 9 are attached to substantially central portions of the lower left frame 3 and the lower right frame 4, respectively. A left horizontal frame 10 and a right horizontal frame 11 are attached to the upper portions of the side left center frame 8 and the right side center frame 9, respectively. An insulating frame 12 supported by these frames is provided above the left front frame 6, the right front frame, the left center frame 8, and the right center frame 9. The insulating frame 12 is a frame body having a plurality of small chambers (four in the figure) 13 that open in front of and below the drawer-type high-voltage electromagnetic contactor, and is made of an insulating material. The upper part of the side wall portion 13a constituting each of the rooms 13 is widened, and a locking groove 13b is formed in the center thereof so as to form the same plane as the side wall portion 13a. . In addition, the left horizontal frame 10 and the right horizontal frame 1
An upper support frame 14 and a lower support frame 15 supported by the left horizontal frame 10 and right horizontal frame 11 are provided above and below the rear part of the vehicle. These upper support frame 14 and lower support frame 15 are made of an insulating material and are rod-shaped members with a substantially rectangular cross section, and a plurality of clamping portions 16 and 17 are arranged at equal intervals in their intermediate portions. It is installed protrudingly. These clamping parts 16 and 17 are formed in an annular shape, and each has an annular locking groove 16 in its center.
a... and 17a... are formed. 1st
As shown in the figure, support conductors 18 and 19 are supported on the upper support frame 14 and the lower support frame 15. These support conductors 18 and 19 are plate-like members made of conductive material, and connect fingers 20 and 21 are provided at their ends.
is attached. These connect fingers 20 and 21 are clamping members made of conductive material, and are normally fitted with bus bars 22 and 23 on the high voltage circuit side, and are used to pull out the drawer type high voltage magnetic contactor for maintenance and inspection. When the above bus bar 2
2 and 23 are released. A vacuum switch 24... is installed in the small room 13..., and this vacuum switch 24... connects the support conductor 1 to the connect fingers 20, 21
8, 19 and other supporting conductors and are connected via lead wires. There is a power fuse 25 on the upper part of the insulating frame 12 above the vacuum switch 24...
...is fixed. This power fuse 25...
. . . and the vacuum switch 24 . . . are connected to each other through the insulating frame 12. Each of the above power fuses 25...between these power fuses 2
5... Insulating plate 26 for insulating the space between...
is provided. These insulating plates 26 are fitted and locked into the locking structures 13b and 16a. In addition, a locking hole 26a is bored in the rear lower part of each insulating plate 26. Support rods 27 are penetrated and disposed in these locking holes 26a, and the support rods 27 are fixed at both ends to the left horizontal frame 10 and right horizontal frame 11 with round screws 28, 28. . A front cover 29 is attached to the front surface of each of the above-mentioned insulating plates 26. Next, the assembly structure between the insulating plate 26, upper support frame 14, insulating frame 12, support rod 27, front cover 29, and each member will be explained in more detail with reference to FIG. A locking portion 3 is provided at a lower front corner and a lower rear corner of the insulating plate 26, respectively.
0,31 are formed. The locking portion 30 is formed by cutting approximately half the height and half the width of the insulating plate 26. The locking portion 31 is cut out with a size approximately half of the cutout size of the locking portion 30 described above. A locking recess 32 is further formed in the center of the locking portion 31 . Further, the locking hole 26a is bored in the lower center of the insulating plate 26 between the locking portions 30 and 31. The insulating plates 26 are fixed in the front, rear, right and left directions by fitting into the locking grooves 13b of the insulating frame 12 and the locking grooves 16a of the upper support frame 14, and are fixed in the vertical direction. As described above, this is achieved by fixing the support rod 27 made of an insulating material that simultaneously passes through the insulating plates 26 and the support rod 27 to the left horizontal frame 10 and the right horizontal frame 11 with round screws 28. .

By the way, in the above-mentioned conventional draw-out type high-voltage electromagnetic contactor, parts such as the support rod 27 and the round screws 28, 28 are required in order to fix the insulating plate 26 as described above, and the locking hole 26a is . . . It is also necessary to drill screw holes for fitting the round screws 28 into the left horizontal frame 10 and the right horizontal frame 11. As a result, material costs and processing fees have increased, resulting in higher product prices.

This invention was made in view of the above circumstances,
The purpose is to provide a drawer-type high-voltage electromagnetic contactor with a low manufacturing cost.The insulating plate is fixed in the vertical direction by a locking edge formed on the front cover provided on the front of the insulating plate, and is supported by rod, round screw,
All locking holes and screw holes are omitted.

The present invention will be explained below with reference to the drawings. FIG. 4 is a partially enlarged view showing the first embodiment of the invention. In the figure, the same reference numerals as in FIGS. 1 to 3 indicate the same components. In the figure, reference numeral 40 is an insulating plate. This insulating plate 40 is a plate-like member having a vertical dimension shorter than that of the conventional insulating plate 26, and the lower front corner of this insulating plate 40 has a locking hole that locks into the locking hole 13b of the insulating frame 12. Part 4
1 is formed, and a locking recess 42 that locks into the locking groove 16a of the upper support frame 14 is formed at the rear of the lower part. Further, reference numeral 43 is a front cover. The upper end portion 44 of this front cover 43 is bent and extended so as to cover the front upper corner portion 40a of the insulating plate 40 (hereinafter, the upper end portion 44 will be referred to as a locking edge 44).

In the above structure, the insulating plate 40 is fixed in the front, rear, right and left directions by the locking portions 41 and the locking recesses 42 and the locking holes 13b of the insulating frame 12.
This is done by engagement with the locking groove 16a of the upper support frame 14, and fixation in the vertical direction is performed by the locking edge 44 of the front cover 43. Therefore, in order to fix the insulating plate 40 in the vertical direction, a support rod, a locking hole for penetrating and installing the support rod in the insulating plate, a round screw for fixing the support rod to the frame, and this round screw are provided. It is possible to omit screw holes for fitting the frame to the frame, and the manufacturing cost of the product can be reduced.

FIG. 5 is a partially enlarged view showing a second embodiment of the invention. In the figure, the same reference numerals as in FIG. 4 indicate the same constituent elements, and their explanation will be omitted. In the figure, reference numeral 45 is an insulating plate. A locking portion 46 is provided at the lower front corner of the insulating plate 45. This locking portion 46 is similar to the locking portion 41 in the first embodiment.
The dimensions in the front-rear direction are slightly larger. A locking recess 47 is provided at the rear of the lower part of this insulating plate 45.
is provided. A side portion 48 near the center of the locking recess 47 is inclined from the upper corner of the locking recess 46 to the opening so as to sandwich the opening. Further, reference numeral 49 denotes an upper support frame that locks the locking recess 46 . This upper support frame 49 is formed to have approximately the same shape and dimensions as the upper support frame 14, but its central support portion 50
The front surface 51 of the front surface 51 is sloped so as to protrude upward and forward from the center of the front surface 51.
Note that 45a in the figure indicates the front upper corner of the insulating plate 45. If such an insulating plate fixing structure is adopted, not only the same advantages as the first embodiment described above can be obtained, but also the insulating plate 45 can be fixed after each component is assembled.
The locking recess 47 and the front surface 51 of the central support portion 50 of the upper support frame 14 are locked, and the insulating plate 45 can be more firmly fixed.

As explained above, the drawer-type high-voltage electromagnetic contactor according to the present invention has a structure in which the insulating plate is fixed in the vertical direction by a locking edge formed on the front cover provided on the front surface of the insulating plate. Manufacturing price can be lowered.

[Brief explanation of the drawing]

Figures 1 and 2 show a conventional draw-out type magnetic contactor. Figure 1 is a side view, Figure 2 is a front view partially viewed from line A-A in Figure 1, and Figure 3 is a conventional draw-out type magnetic contactor. FIGS. 4 and 5 are side views showing the fixed state of the insulating plate of the drawer-type high-voltage magnetic contactor according to the present invention, and FIGS. FIG. 12... Insulating frame, 14, 19... Upper support frame, 24... Power fuse, 40, 45...
...Insulating plate, 43...Front cover.

Claims (1)

[Claims] 1. An insulating plate that has a vacuum switch inside and insulates the space between power fuses connected to the vacuum switch is latched to an insulating frame and an upper support frame surrounding the vacuum switch, and is attached to each of the above parts. In a drawer-type high-voltage electromagnetic contactor having a front cover on the front, the upper end of the front cover is bent and extended to cover the upper front corner of the insulating plate to fix the vertical position of the insulating plate. A draw-out type high-voltage electromagnetic contactor that performs the following functions.