JPH0127259Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement of a cover for insulating the connecting portions of bus bars and conductors of closed switchboards and the like.

[Conventional technology and its problems]

Conventionally, as an example of this type of insulating cover for a conductor connection part, Japanese Utility Model Application Publication No. 53-110474 discloses a pair of insulating upper bottom plates 1 formed in a concave shape to cover a conductor connection part.
7, 17', and a pair of expandable and contractible side plates 13, 14 formed in a striped shape connecting the opposing sides of the pair of upper bottom plates. , 14 is shown having its end edge separably adhered to either one of the pair of upper base plates. This shape is attached so as to wrap around the joint of the conductor, so its use is limited to cases where the joined conductors are arranged in a straight line. Furthermore, even if the conductor is clamped by the elastic contraction force of the bellows-shaped side plate, the clamping pressure is unstable and may spread due to external force. There were some drawbacks such as not being able to do so.

[Purpose of invention]

The present invention eliminates these conventional drawbacks, and the arrangement of the conductor coupling part is not limited to a straight line, but can be applied to an L-shape, T-shape, or cross-shape, and can also be applied to changes in the width, thickness, and number of stacked conductors. The purpose of this invention is to make it possible to select the notch size accordingly, to make it applicable to various conductor sizes, to facilitate standardization, and to reduce costs.

[Structure of the idea]

The present invention insulates and insulates the joints of conductors that are stacked and jointed, and is made of semi-hard synthetic resin, and the upper cover and the lower cover each have a substantially rectangular upper bottom surface, and the upper cover and the lower cover each have a substantially rectangular upper bottom surface, and are suspended or It has a side surface that stands up, and fits like a lunch box so that the outside side surface of the lower cover and the inside side surface of the upper cover are aligned, and the surface of the side surface of each upper and lower cover has vertical and horizontal notches that can be cut out to fit various conductor sizes. a groove is provided, ears are provided at the four corners of the bottom of the lower cover and four corners of the bottom or side of the upper cover, holes for connecting both covers are provided therein, and cutout recesses are provided at the four corners of the side of the upper and lower covers;
It is characterized in that the ear portion is housed in a notched recess.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings. Fig. 1 is a perspective view, Fig. 2 is an exploded perspective view, Fig. 3 is a perspective view showing a state in which it is applied to a joint, and Fig. 4 is an unfolded perspective view. For example, an upper cover 1 and a lower cover 2 made of thermoplastic resin each have a substantially rectangular shape and are provided with cutout recesses 1a and 2a at the four corners, and at the same time are provided with an upper bottom surface 1b and a lower bottom surface 2b.
A side surface 1c that falls down or a side surface 2c that rises from b, 2b is provided, and the inside of the side surface 1c of the upper cover 1 is fitted to the outside of the side surface 2c of the lower cover 2 in a bento box style, and the gap is The diameter is set to be as small as 1 to 3 mm, for example, so as not to interfere with sliding during the process. The surfaces of the side surfaces 1c and 2c of the upper and lower covers 1 and 2 are provided with vertical and horizontal notch grooves 1d and 2d that can be cut out in accordance with various conductor sizes. Upper and lower bottom surfaces 1b,
Notch recesses 1a, 2a are provided at the four corner side corners of 2b, and the ear parts 1e, 2 are fitted in the notch recesses.
e, and connecting holes 1f and 2f for binding or connecting the upper and lower covers 1 and 2 to each other are provided in the center thereof.
has been established.

Semi-rigid means that it does not undergo major deformation when subjected to some external force, does not interfere with its closing and protection functions, has elasticity and restoring force, and can be relatively easily cut out for conductor penetrations. It refers to something that has a certain degree of hardness.

Next, an example in which this insulating cover is applied to a joint portion of a conductor will be described. As shown in Figures 3 and 4, the ends of the conductors 3, 3, which are arranged linearly, have their insulating tubes 4 stripped off, and are tightened with two tightening bolts 5 to expose the conductive parts on the joints 3a. , when installing the lower covers 1 and 2, use a knife, cutter, etc. to make sure that the widths of the cutouts 1g and 2g on the A and B sides of the upper and lower covers 1 and 2 match the width of the conductor 3 with some margin. Cut and form cut grooves 1d and 2d. Also, when the upper and lower covers 1 and 2 are overlapped, the gap created at the overlapping part of the cutouts 1g and 2g of the upper and lower covers 1 and 2 is made to match the cross section of the conductor 3, and the conductors 3 and 3 are passed through this gap. The conductors 3, 3 are held between the upper and lower covers 1, 2 in such a manner that they are pulled out, and the opposing connection holes 1f, 2f are tied together with an insulating string 6 or the like. There is no problem in connecting with bolts or the like instead of binding with this insulating string. At this time, the overlapping dimension of the upper and lower covers is preferably about 5 mm or more, and if the overlapping dimension is about 5 mm or more, it is possible to prevent the operator from accidentally touching the live parts.

In the above-mentioned embodiment, the arrangement of the conductor coupling portions is linear, but other embodiments of the arrangement of the conductor coupling portions are shown in FIGS. 5 to 7. FIG. 5 shows an L-shaped arrangement, and the cutout portions of the upper and lower covers 1 and 2 may be cut out on the A and C sides according to the conductor size. Figure 6 shows an example of T-shaped arrangement, with upper and lower covers 1,
For the cutout parts 2, three sides A, B, and D are cut out in the same way as above. Figure 7 shows an example of a cross-shaped arrangement. All you have to do is cut out the four sides in the same way as above.

Further, in the above-mentioned embodiment, there is no stacking and bonding, but in FIG.
The cut portion may be cut deeper than when joining surfaces A and B in the depth direction. Note that a gap occurs between the first and second conductors, but if an insulating spacer or the like is inserted here, the conductive portion can be prevented from being exposed.
Furthermore, the same method can be applied to multi-stage stacking.

Further, in the above-mentioned embodiment, the application method is such that the device is supported by a conductor in a suspended state, but FIG. 9 shows another embodiment of the application location and support method.
In this case, the insulating cover is fixed to the support insulator, and the cutouts of both the upper and lower insulating covers 1 and 2 are A and B.
At the same time as cutting out the surface, holes are made in the lower bottom surface 2b of the lower cover 2 at positions corresponding to the mounting holes of the supporting insulator 7, and the supporting insulator 7 is inserted between the conductor 3 and the lower bottom surface 2b of the lower cover 2.
The tightening bolt 5 is then tightened.

[Effect of idea]

As described above, the present invention can be applied to cases where the shape of the conductor connection is not limited to a straight line but branches in multiple directions such as L-shape, T-shape, cross shape, etc. Since arbitrary notches can be provided according to the requirements, standardization is easy and the number of types can be reduced to reduce costs.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is an exploded perspective view thereof, Fig. 3 is a perspective view showing a state in which it is applied to a joint, Fig. 4 is an exploded perspective view thereof, and Fig. 5
9 to 9 show other embodiments of the present invention, FIG. 5 is a plan view of an L-shaped joint, FIG. 6 is a plan view of a T-shaped joint, and FIG. 7 is a cross-shaped joint. FIG. 8 is a front view of a two-tier stacked arrangement, and FIG. 9 is a front view of a case where it is fixed to a supporting insulator. 1...Top cover, 2...Bottom cover, 1c, 2c
...Side surface, 1d, 2d... Cut groove, 1g, 2g...
... Cutting portion, 3... Conductor, 6... Insulating string.

Claims (1)

[Claims for Utility Model Registration] 1. A device that insulates the bonded portion of conductors that are stacked and bonded, and is made of semi-hard synthetic resin, and the top cover and bottom cover each have a substantially rectangular top and bottom surface. , each of these has a side surface that hangs down or rises from the bottom surface, and is fitted like a lunch box so that the inside side surface of the upper cover is aligned with the outside side surface of the lower cover, and the side surface of each of the upper and lower covers is cut to fit the various conductor sizes. A conductor connection characterized in that removable vertical and horizontal cut grooves are provided, ears are provided at the four corners of the bottom of the lower cover and four corners of the bottom or side surfaces of the upper cover, and holes are provided therein for connection between the upper and lower covers. Insulating cover for the section. 2. The conductor connecting portion according to claim 1 of the utility model registration claim, characterized in that cutout recesses are provided in the four side corners of both the upper and lower covers, and the ears are accommodated in the cutout recesses. insulation cover.