JP2023155649A - Insulation cover and protection method of connection point between electric wire/cable and expansion bar - Google Patents

Abstract

To provide an insulation cover that can prevent a short circuit from occurring between a cable terminal and a conductor even when there is the conductor near the cable terminal when connecting the cable terminal to a terminal mounting plate of a terminal mounting portion via an expansion bar.SOLUTION: An insulation cover 1 is attached to cover the outer periphery of a sheath 12 of an electric wire/cable 10, a conductor 11 of the electric wire/cable 10 exposed from the end of the sheath 12, a connecting tube portion 21 of a terminal 20 connected to the conductor 11, a battledore portion 22 of the terminal 20, and a connection point α of an expansion bar 30 that connects a terminal mounting plate 42 of a terminal mounting portion 41 and the terminal 20 and the battledore portion 22.SELECTED DRAWING: Figure 2

Description

The present invention relates to an insulating cover and a method for protecting a connection point between an electric wire/cable and an extension bar.

For example, as described in Patent Document 1, a terminal of an electric wire/cable (hereinafter, an electric wire/cable is simply referred to as a cable) connected to a terminal mounting plate of a terminal mounting part such as a breaker or a terminal block is If the battledore part is too large to connect directly, connect one end of the extension bar (also referred to as a connection bar, joint bar, etc.) to the terminal mounting plate, and connect the cable terminal to the other end of the extension bar. In some cases, the cable terminals are connected to the terminal mounting plate via an extension bar.

In addition, in Patent Document 1, when each terminal of a plurality of cables (three in the same document) is connected to a plurality of (three in the same document) terminal mounting plates of the terminal mounting portion via an extension bar, However, for example, when connecting the terminals of one cable to one terminal mounting plate of the terminal mounting section, it is also possible to connect them via an extension bar. can.

Patent No. 7000534

By the way, when connecting the cable terminals to the terminal mounting plate of the terminal mounting section via the expansion bar, if there is a conductor such as a metal structure or wall near the connection part, the connection part or A short circuit may occur between the conductor or terminal of the cable and the conductor.

The present invention has been made in view of the above-mentioned problems, and when a cable terminal is connected to a terminal mounting plate of a terminal mounting portion through an extension bar, even if a conductor exists in the vicinity, the conductive It is an object of the present invention to provide an insulating cover and a method of protecting a connection point between an electric wire/cable and an extension bar, which can suppress the occurrence of a short circuit with the body.

In order to solve the above problem, the invention according to claim 1 provides an insulating cover that includes:
A sheath of an electric wire/cable, a conductor of the electric wire/cable exposed from an end of the sheath, a connecting cylinder portion of a terminal connected to the conductor, a battledore portion of the terminal, and a terminal mounting portion of the terminal mounting portion. It is attached so as to cover the outer periphery of the extension bar that connects the board and the terminal and the connection point with the battledore section.

The invention according to claim 2 is the insulating cover according to claim 1, in which a plurality of terminals are connected to the plurality of terminal mounting plates provided in the terminal mounting portion via the expansion bar and the terminal, respectively. Each is attached to the electric wire/cable.

The invention according to claim 3 is the insulating cover according to claim 1 or 2, which is composed of a plurality of cylindrical partial covers, and the plurality of partial covers are partially overlapped or not overlapped. The electric wires/cables are arranged in the axial direction and installed.

The invention according to claim 4 is the insulating cover according to claim 1 or 2, in which a cut extending in the axial direction of the electric wire/cable is provided, and the cut is widened to prevent the electric wire/cable from forming. It is attached so as to cover the area from the sheath to the connection point from the outside.

The invention according to claim 5 is the insulating cover according to claim 4, wherein a protrusion is provided on one side of the cut and a hole is formed on the other side, so that the electric wire/cable can be removed from the sheath. It is fixed by engaging the protrusion with the hole while covering the portion up to the connection point from the outside.

The invention according to claim 6 is the insulating cover according to claim 1 or 2, which is composed of a first part and a second part each having an opening continuous in the axial direction, and wherein the first part and the second part each have a continuous opening in the axial direction. It is configured by mounting the electric wire/cable between the second portion and the portion of the electric wire/cable from the sheath to the connection point, with the electric wire/cable partially overlapping or not overlapping.

According to a seventh aspect of the invention, in the insulating cover according to any one of claims 1 to 6, an opening is provided on a side facing a wall to which a device having the terminal attachment portion is attached. .

According to an eighth aspect of the invention, in the insulating cover according to any one of claims 1 to 7, a part or the whole is transparent, and the expansion bar and the insulating cover are connected to each other through the transparent part. The connection point with the battledore portion is visible.

According to a ninth aspect of the invention, in the insulating cover according to any one of the first to eighth aspects, a lug-like piece is formed at an end on the connection point side.

The invention according to claim 10 is the insulating cover according to any one of claims 1 to 8, wherein a slit is provided to form a lid, and the lid can be turned up. It is configured as follows.

The invention according to claim 11 is
A method for protecting a connection point between an electric wire/cable and an expansion bar, which protects a connection point between an electric wire/cable and an expansion bar of a terminal mounting plate of a terminal mounting portion, the method comprising:
The insulating cover includes a sheath of the electric wire/cable, the conductor of the electric wire/cable exposed from the end of the sheath, a connecting tube part of the terminal connected to the conductor, and a battledore part of the terminal. , covering an outer periphery of a connection point between the expansion bar and the battledore portion.

The invention according to claim 12 is the method for protecting a connection point between an electric wire/cable and an extension bar according to claim 11, wherein the outer periphery is connected to the terminal mounting plate of the extension bar with an insulating cover. The insulating cover is covered so that a portion thereof protrudes from the insulating cover.

According to the present invention, when a cable terminal is connected to a terminal mounting plate of a terminal mounting portion via an extension bar, even if a conductor exists near the connection part, a short circuit occurs between the cable and the conductor. It becomes possible to suppress this.

(a) It is a figure showing the structure of a cable and the terminal attached to it, and (b) It is a figure showing the state where the terminal was attached to the expansion bar attached to the terminal attachment plate. (a), (b) It is a figure showing the state where the insulation cover based on the 1st actual form was mounted. (a) A diagram showing a terminal attachment part of a breaker to which an outwardly curved expansion bar is connected, and (b) a diagram showing a state in which an insulating cover is attached to each cable connected to each expansion bar. . (a) It is a diagram showing the terminal attachment part of the breaker to which the vertically bent extension bar is connected, and (b) It is a diagram showing the state where each cable connected to each extension bar is attached with an insulating cover. . FIG. 3 is a diagram illustrating insulation barriers provided between each expansion bar. It is a figure explaining the attachment method 1 of an insulating cover. It is a figure explaining the attachment method 2 of an insulating cover. (a) is a diagram illustrating a third method of attaching an insulating cover, and (b) is a sectional view taken along line XX in (a). (a) It is a figure explaining the attachment method 4 of an insulating cover, (b) It is a figure showing the state where the insulating cover is attached so that a cable is sandwiched between an upper part and a lower part. FIG. 3 is a diagram illustrating a configuration 1 in which the insulating cover has an opening. FIG. 7 is a diagram illustrating configuration 2 in which the insulating cover has an opening. FIG. 7 is a diagram illustrating configuration 3 in which the insulating cover has an opening. FIG. 4 is a diagram illustrating a configuration 4 in which the insulating cover has an opening. (a) This is a diagram showing a state in which an x mark is drawn at the connection point, and (b) is a diagram showing a state in which the line drawn on the battledore of the terminal and the line drawn on the tightening bolt are misaligned. . It is a figure showing the state where (a) the part which opposes a connection place of an insulating cover, (b) the part around a connection place, and (c) the whole are made transparent. It is a figure showing the state where the upper part shown in FIG.9(b) is made transparent. (a) It is a figure showing composition A which makes it possible to retighten the tightening bolt, and (b) is a figure showing the state where the insulating cover is folded back. (a) It is a figure showing composition B which makes it possible to retighten the tightening bolt, and (b) is a figure showing a state where the lid part is turned up. It is a figure showing the state in which (a) the slit was formed horizontally in an insulating cover, and the state in which the slit was formed vertically (b). It is a figure showing the state in which the slit is formed in (a) a V-shape, and (b) the state in which it is formed in a step-like shape. FIG. 6 is a diagram showing a protrusion provided on the lid of the insulating cover and a hole provided at the edge of the slit.

EMBODIMENT OF THE INVENTION Hereinafter, several embodiments of the insulating cover according to the present invention will be described with reference to the drawings.
However, although various limitations that are technically preferable for implementing the present invention are attached to each of the embodiments described below, the scope of the present invention is not limited to the following embodiments or illustrated examples. do not have. Also, in the following, electric wires and cables are simply referred to as cables.

Before explaining the insulating cover according to the present invention, the cable, the terminal attached to the cable, the terminal mounting plate of the terminal mounting portion, the extension bar connecting the cable terminal and the terminal mounting plate, etc. will be explained.
FIG. 1(a) is a diagram showing the configuration of a cable and a terminal attached to the cable.

The cable 10 includes a conductor 11 made of thin wire made of copper, copper alloy, aluminum, or aluminum alloy, a sheath 12 covering the conductor 11, and the like.
Further, the conductor 11 is formed by twisting a plurality of wires together. Further, the conductor 11 is covered with an insulating layer (not shown), and the insulating layer is covered with a sheath 12. Note that the insulating layer can be formed of, for example, crosslinked polyethylene. Further, the insulating layer and the sheath 12 may be formed of multiple layers.

A terminal 20, in which a connecting tube part 21 and a battledore part 22 are integrally formed, is attached to the conductor 11 of the cable 10 exposed from the end of the sheath 12.
In the present embodiment, the conductor 11 of the cable 10 is inserted into the connecting cylinder part 21 of the terminal 20, and the connecting cylinder part 21 is compressed or crimped together with the inserted conductor 11, so that the terminal 20 is connected to the conductor 11 of the cable 10. is connected to.

As shown in FIG. 1B, a metal expansion bar 30 is attached to the terminal mounting plate 42 of the breaker or the terminal block (terminal block 40A in the figure).
By connecting the expansion bar 30 and the battledore portion 22 of the terminal 20, the terminal 20 and the terminal mounting plate 42 are connected via the expansion bar 30.

In this way, the cable 10 is connected to the terminal mounting plate 42 of the terminal mounting section 41 via the terminal 20 and the expansion bar 30.
The expansion bar 30 is thus a member for electrically connecting the terminal 20 attached to the conductor 11 of the cable 10 and the terminal attachment plate 42 of the terminal attachment part 41.

Next, an insulating cover according to the present invention will be explained.
The insulating cover includes a sheath 12 of the cable 10 , a conductor 11 of the cable 10 exposed from the end of the sheath 12 , a connecting tube portion 21 of the terminal 20 connected to the conductor 11 , and a battledore portion 22 of the terminal 20 . It is configured to be attached so as to cover the outer periphery of the connection point α between the expansion bar 30 and the battledore portion 22.

Note that, as shown in FIG. 1(b), the expansion bar 30 and the battledore portion 22 are connected by being tightened with a tightening bolt B.
Further, hereinafter, the connection point α between the expansion bar 30 and the battledore portion 22 may be simply referred to as the connection point α with the expansion bar 30.

Furthermore, in the present invention, when covering the outer periphery of the connection point α, etc., there are cases where the entire outer periphery of the sheath 12 of the cable 10, the conductor 11, the connection tube part 21 of the terminal 20, the battledore part 22, and the connection point α is covered. As shown in FIGS. 10 to 13, which will be described later, other than the opening 5 provided on the side facing the wall W (see FIG. 4(a), which will be described later), on which devices 40 such as the terminal block 40A and the breaker 40B are attached, This also includes cases where parts are covered.
Hereinafter, several embodiments will be specifically described.

[First embodiment]
FIGS. 2(a) and 2(b) are diagrams showing a state in which the insulating cover according to the first practical embodiment is attached.
In this embodiment, the insulating cover 1 is a cylindrical member made of an insulating material such as resin.
As shown in FIGS. 2(a) and 2(b), the insulating cover 1 connects the sheath 12 of the cable 10, the conductor 11, the connection tube part 21 of the terminal 10, the battledore part 22, and the extension bar 30. α is attached so as to cover the entire outer periphery.

With this configuration, the conductor 11 of the cable 10 and the connection portion α between the connection tube portion 21 of the terminal 20, the battledore portion 22, and the expansion bar 30 are covered with the insulating cover 1, and are not exposed to the outside.
Further, as shown in FIGS. 2A and 2B, all parts other than the connecting part between the expansion bar 30 and the terminal mounting plate 42 are covered with the insulating cover 1.

That is, even if a conductor (not shown) exists near the conductor 11 of the cable 10 and the terminal 20 connected to the terminal mounting plate 42 via the expansion bar 30, the conductor and the conductor 11 of the cable 10 and the terminal 20, the insulating cover 1 is interposed between the connection point α and the like with the expansion bar 30.
Therefore, according to the present embodiment, when connecting the terminal 20 of the cable 10 to the terminal mounting plate 42 of the terminal mounting section 41 via the extension bar 30, even if a conductor exists near the connection part, , it becomes possible to suppress the occurrence of a short circuit between the connection point α of the cable 10 to the conductor 11, the terminal 20, or the extension bar 30, and the conductor.

[Second embodiment]
In addition, in FIGS. 2A and 2B, the insulating cover 1 is connected to one cable 10 connected to one terminal mounting plate 42 provided in the terminal mounting part 41 via the extension bar 30 and the terminal 20. The case where it is attached to is shown.
However, it is also possible to attach the insulating cover 1 to each of the plurality of cables 10 connected to the plurality of terminal mounting plates 42 provided in the terminal mounting portion 41 via the expansion bar 30 and the terminal 20, respectively. be.

For example, as shown in FIG. 3(a), a plurality of (three in the figure) terminal mounting plates 42 may be provided on the terminal mounting portion 41 of the breaker 40B, and each terminal mounting plate 42 is provided with an extension bar. 30 may be attached to each.
That is, the central expansion bar 30a is not curved, but the left and right expansion bars 30b and 30c may be configured to curve outward, respectively.

With this configuration, when terminals 20 and cables 10 are connected to each of the expansion bars 30a to 30c, there is a gap between each terminal 20 and each cable 10, and short circuits are less likely to occur between them.
In this case, as shown in FIG. 3(b), it is possible to attach the insulating cover 1 to each cable 10 from the sheath 12 to the connection point α with the expansion bar 30.

With this configuration, similarly to the first embodiment, when connecting the terminals 20 of each cable 10 to each terminal mounting plate 42 of the terminal mounting section 41 via each extension bar 30, the connecting portions of the terminals 20 of each cable 10 are Even if a conductor exists in the vicinity of the conductor, it is possible to prevent a short circuit from occurring between the conductor and the connection point α of the cable 10 with the conductor 11, the terminal 20, or the extension bar 30.
Further, since the insulating cover 1 is attached to each cable 10, it is possible to suppress short circuits between each cable 10, each terminal 20, each extension bar 30, etc.

[Third embodiment]
Further, as shown in FIG. 4A, for example, a plurality of (three in the figure) terminal mounting plates 42 may be provided on the terminal mounting portion 41 of the breaker 40B, and each terminal mounting plate 42 may have a Expansion bars 30 bent in the vertical direction may be attached to each of them.
In this case, for example, the central expansion bar 30d may be bent upward, and the left and right expansion bars 30e, 30f may be bent downward, respectively.

Note that FIG. 4A shows a case where the breaker 40B is attached to the wall W via the pedestal P. Instead of the pedestal P, the breaker 40B may be attached to the wall W, for example, via a rail or the like. When the expansion bars 30d to 30f are configured as described above, when the terminals 20 and cables 10 are connected to each of the expansion bars 30d to 30f, there will be gaps between each terminal 20 and each cable 10, and there will be gaps between them. Short circuits are less likely to occur.
In addition, if the distance between the tightening bolt B (see Figure 1(b)) and the wall W is short, a rubber sheet may be placed between each cable 10 and the wall for insulation, as shown in Figure 4(b). Sometimes S is placed.

In the above case, as shown in FIG. 4(b), it is possible to attach the insulating cover 1 to each cable 10 from the sheath 12 to the connection point α with the expansion bar 30.
Note that although the cable 10 and the insulating cover 1 are not shown in FIG. 4(a), the same applies to the case of FIG. 4(a).

With this configuration, similarly to the first embodiment, when connecting the terminals 20 of each cable 10 to each terminal mounting plate 42 of the terminal mounting section 41 via each extension bar 30, the connecting portions of the terminals 20 of each cable 10 are Even if a conductor exists in the vicinity of the conductor, it is possible to prevent a short circuit from occurring between the conductor and the connection point α of the cable 10 with the conductor 11, the terminal 20, or the extension bar 30.

For example, even if an attempt is made to bend the expansion bar vertically to ensure separation from adjacent phases as shown in FIGS. 4(a) and 4(b), the depth (height) of the casing housing breaker B There are restrictions on the distance, and it may not be possible to ensure sufficient separation. In such a case, similarly to the second embodiment, by attaching the insulating cover 1 to each cable 10, short circuits between each cable 10, each terminal 20, each extension bar 30, etc. can be suppressed. It becomes possible to do so.
Furthermore, when the expansion bar 30 is bent downward, the distance between the tightening bolt B and the wall W becomes shorter, so it becomes necessary to ensure insulation by laying a rubber sheet S as described above. When the cable 10 is covered with the insulating cover 1 as in the embodiment, the entire connection point α, including the tightening bolt B, is covered with the insulating cover 1, so there is an effect that there is no need to spread the rubber sheet S.

Further, for example, when a plurality of breakers 40B are arranged in parallel, if each expansion bar 30 is configured so that the left and right expansion bars 30b and 30c are respectively curved outward as shown in FIG. Since the expansion bars 30 of the breaker 40B collide with each other, the expansion bars 30d, 30e, and 30f may be bent in the vertical direction as shown in FIG. 4(a).
Even in such a case, by attaching the insulating cover 1 as shown in FIG. 4(b), it is possible to suppress short circuits between the cables 10 and the like.

In this case, in order to more reliably prevent short circuits between the expansion bars 30, etc., a plate-shaped insulating barrier 43 is provided between each expansion bar 30, as shown in FIG. It is also possible to configure

[How to protect the connection points between electric wires/cables and expansion bars]
Next, a method for protecting a connection point between an electric wire/cable and an extension bar according to the present invention will be explained.
In the method for protecting a connection point between an electric wire/cable and an extension bar according to the present invention, when protecting the connection point α between the cable 10 and the extension bar 30 of the terminal mounting plate 42 of the terminal mounting portion 41, the above method is applied. In the insulating cover 1, the sheath 12 of the cable 10, the conductor 11 of the cable 1 exposed from the end of the sheath 12, the connecting cylinder part 21 of the terminal 20 connected to the conductor 11, and the battledore part of the terminal 20 22 and the connection point α between the expansion bar 30 and the battledore portion 22.

With this configuration, when connecting the terminal 20 of the cable 10 to the terminal mounting plate 42 of the terminal mounting section 41 via the extension bar 30, even if a conductor exists near the connection part, the cable 10 It becomes possible to suppress the occurrence of a short circuit between the connection point α of the conductor 11, the terminal 20, or the extension bar 30 and the conductor.
Also, when a plurality of cables 10 are respectively connected to a plurality of terminal mounting plates 42 of the terminal mounting part 41, an insulating cover is placed on the connection portion between each extension bar 30 attached to each terminal mounting plate 42 and each cable 10. is installed, it is possible to prevent short circuits from occurring between each cable 10, each terminal 20, each extension bar 30, etc.

Further, in this case, it is desirable to cover the outer periphery of the connection point α etc. so that the portion of the expansion bar 30 connected to the terminal mounting plate 42 protrudes from the insulating cover 30.
With this configuration, it is possible to reliably connect the expansion bar 30 to the terminal mounting plate 42 while covering the connection point α between the cable 10 and the expansion bar 30 with the insulating cover 30.

[How to attach the insulation cover]
Here, the method of mounting the insulating cover 1 in each of the above embodiments will be described using several examples. Note that the method of mounting the insulating cover 1 is not limited to the following examples.

[Installation method 1]
For example, as shown in FIG. 6, the cable 10 is inserted into the insulating cover 1, and the insulating cover 1 is temporarily released onto the cable 10.
Then, the terminal 20 is attached to the conductor 11 exposed from the end of the cable 10 by compressing or crimping. After connecting the terminal 20 to the expansion bar 30 connected to the terminal attachment plate 42 of the terminal attachment part 41, the insulating cover 1 is moved to a position on the outer periphery of the terminal 20, the expansion bar 30, etc., as shown in FIG. It is possible to attach the insulating cover 1 as shown in (a), (b), etc.

[Installation method 2]
Further, as shown in FIG. 7, the insulating cover 1 can be configured with a plurality of partial covers 1A and 1B, both of which are cylindrical.
In FIG. 7, the insulating cover 1 includes a partial cover 1A that covers the outer periphery of the connecting portion α between the connecting tube portion 21, the battledore portion 22, and the expansion bar 30 of the terminal 20, the sheath 12 of the cable 10, the conductor 11, and the terminal 20. A case is shown in which a partial cover 1B that covers the outer periphery of the connecting cylinder portion 21 is composed of two partial covers.

In the example of FIG. 7, the partial cover 1A is stacked on the partial cover 1B, but the partial cover 1B may be stacked on the partial cover 1A. Further, although the partial cover 1A and the partial cover 1B overlap at the outer circumferential portion of the connection tube portion 21 of the terminal 20, the partial cover 1A and the partial cover 1B may be configured so that they are simply arranged in the axial direction of the cable 10 without overlapping. is also possible.
Further, the insulating cover 1 may be configured with three or more partial covers.

Then, for example, the cable 10 is inserted into the partial cover 1A, and the partial cover 1A is temporarily released onto the cable 10. Similarly, the cable 10 is inserted into the partial cover 1B, and the partial cover 1B is temporarily released onto the cable 10.
Then, the terminal 20 is attached to the conductor 11 exposed from the end of the cable 10 by compressing or crimping, and after connecting the terminal 20 to the expansion bar 30, the partial cover 1B is inserted from the sheath 12 of the cable 10 to the connecting tube of the terminal 20. The partial cover 1B is attached to the position of the outer periphery of the part up to the part 21.

Next, the partial cover 1A is moved to the outer circumference position of the portion from the connection cylinder part 21 of the terminal 20 to the connection point α with the expansion bar 30, and the partial cover 1A is attached, and the insulating cover 1 (in this case Partial covers 1A, 1B) can be attached.
In this way, the insulating cover 1 is composed of a plurality of cylindrical partial covers 1A and 1B, and the plurality of partial covers 1A and 1B are mounted side by side in the axial direction of the cable 10, either partially overlapping or without overlapping. By doing so, it is possible to configure the insulating cover 1.

[Installation method 3]
On the other hand, in the above mounting methods 1 and 2, before compressing or crimping the terminal 20 to the conductor 11 of the cable 10 or connecting the terminal 20 to the expansion bar 30, the insulating cover 1 or partial cover 1A, 1B The case where the cable 10 is inserted in the case has been explained.
However, there are cases where the user forgets to insert the cable 10 into the insulating cover 1 or the partial covers 1A and 1B in advance.

Therefore, it is also possible to attach the terminal 20 to the conductor 11 of the cable 10 by compressing or crimping it, or to attach the insulating cover 1 after connecting the terminal 20 to the expansion bar 30.
In this case, for example, as shown in FIG. 8(a), it is possible to configure the insulating cover 1 to have a cut 2 extending in the axial direction of the cable 10.

Then, for example, the terminal 20 is attached to the conductor 11 of the cable 10 by compressing or crimping, and the terminal 20 is connected to the expansion bar 30.
Then, the cut 2 of the insulating cover 1 is widened, and the insulating cover 1 is attached to cover the portion of the cable 10 from the sheath 12 to the connection point α with the expansion bar 30 from the outside.

In this way, it is possible to mount the insulating cover 1.
That is, a cut 2 extending in the axial direction of the cable 10 is provided in the insulating cover 1, and the cut 2 is expanded to cover the portion of the cable 10 from the sheath 12 to the connection point α with the expansion bar 30 from the outside. It is possible to configure the insulating cover 1 to be attached to the insulating cover 1.

In this case, if the insulating cover 1 is simply placed over the above-mentioned portion as described above, there is a possibility that a problem such as the cut 2 opening for some reason and the insulating cover 1 falling off may occur.
Therefore, as shown in FIGS. 8A and 8B, for example, a protrusion 3 is provided on one side of the insulating cover 1 across the cut 2, and a hole 4 is formed on the other side.

Then, after covering with the insulating cover 1 as described above, the protrusion 3 is engaged with the hole 4 and fixed.
With this configuration, it is possible to prevent the cut 2 of the insulating cover 1 from opening, and it is possible to prevent problems such as the insulating cover 1 from falling off.

[Installation method 4]
For example, as shown in FIG. 9(a), the insulating cover 1 is divided into an upper part 1C having an axially continuous opening on the lower side and a lower part 1D having an axially continuous opening on the upper side. It is possible to configure
In this case, first, the terminal 20 is compressed or crimped and attached to the conductor 11 of the cable 10, and the terminal 20 is connected to the expansion bar 30.

Then, the lower opening of the upper portion 1C is expanded, and the cable 10 is placed over the portion of the cable 10 from the sheath 12 to the connection point α with the expansion bar 30 from above, as shown in FIG. 9(a). Further, the upper opening of the lower portion 1C is expanded and the cable 10 is placed over the portion of the cable 10 from the sheath 12 to the connection point α with the expansion bar 30 and the upper portion 1C from below.
In this case, the upper part 1C and the lower part 1D may be covered so as to overlap, or the upper part 1C and the lower part 1D may be simply extended from the sheath 12 of the cable 10 without overlapping. It is also possible to configure so that the portion up to the connection point α with the bar 30 is sandwiched.

In this way, as shown in FIG. 9(b), the upper part 1C and the lower part 1D partially overlap the part of the cable 10 from the sheath 12 to the connection point α with the expansion bar 30, Alternatively, the insulating cover 1 (in this case, the upper portion 1C and the lower portion 1D) may be attached so as to be sandwiched without overlapping.
In this case as well, a configuration may be adopted in which projections and holes are provided in the upper portion 1C and lower portion 1D of the insulating cover 1, and the projections are hooked into the holes to fix them.

[About providing an opening in the insulation cover]
On the other hand, if there is no conductor other than the wall W on the wall W to which the appliance 40 having the terminal attachment part 41 (i.e., the terminal block 40A, the breaker 40B, etc. described above) is attached, or if there is a connection between the wall W and the expansion bar 30, etc. If there is sufficient insulation from the wall W, such as when there is a wide gap between them or an insulating sheet is pasted on the wall W, install an insulating cover on the side facing the wall W such as the expansion bar 30 or terminal 20. 1 may not be necessary in some cases.

In such a case, it is possible to configure the insulating cover 1 to have an opening on the side facing the wall W to which the appliance 40 having the terminal attachment part 41 is attached.
Note that the fixture 40 may be attached directly to the wall W, or may be attached to the wall W via a pedestal P or the like as shown in FIG. 4(a). Alternatively, a rubber sheet S may be laid under the cable 10 as shown in FIG. 4(b).

[Configuration 1]
For example, as shown in FIG. 10, an opening may be provided on the side facing the wall W of the insulating cover 1, at a portion of the insulating cover 1 below the connection point α between the expansion bar 30 and the battledore portion 22. It is possible to configure the opening 5 to be provided in the opening 5.
In this case, the insulating cover 1 having the opening 5 can be attached, for example, in the same manner as the above-mentioned attachment method 1 (see FIG. 6).

[Configuration 2]
Further, as shown in FIG. 11, for example, the insulating cover 1 can be configured with a cylindrical partial cover 1E and a partial cover 1F having an opening 5 continuous in the axial direction on the lower side.
In this case, for example, the cable 10 is inserted into the partial cover 1E, and the partial cover 1E is temporarily released onto the cable 10. Then, the terminal 20 is compressed or crimped and attached to the conductor 11 of the cable 10, and the terminal 20 is connected to the expansion bar 30.

Then, the partial cover 1E is shifted, for example, to a position on the outer periphery of the portion from the sheath 12 of the cable 10 to the connection tube portion 21 of the terminal 20, and the partial cover 1E is attached. Further, the opening on the lower side of the partial cover 1F is expanded, and the part from the connecting tube part 21 of the terminal 20 to the connecting point α with the expansion bar 30 is covered from above, for example.
In this way, it becomes possible to mount the insulating cover 1 so that the opening 5 is provided at the lower portion of the connection point α between the expansion bar 30 and the battledore portion 22, etc.

[Configuration 3]
For example, as shown in FIG. 12, when the insulating cover 1 is configured so that the entire side facing the wall W has an opening 5, for example, the insulating cover 1 can be attached as described in the above-mentioned mounting method 4. It can be configured similarly to the upper portion 1C having an axially continuous opening on the side.
Then, the opening 5 on the lower side of the insulating cover 1 is expanded, and the part of the cable 10 from the sheath 12 to the connection point α with the expansion bar 30 is covered from above, as shown in FIG. In this way, it becomes possible to mount the insulating cover 1 having the opening 5.

[Configuration 4]
Further, for the insulating cover 1G having the opening 5 mounted in the state shown in FIG. 12, for example, as shown in FIG. A partial cover 1H having an opening continuous in the axial direction is placed on the upper side.
By doing so, as shown in Configuration 1 and Configuration 2, the opening 5 is provided in the lower part of the connection point α between the expansion bar 30 and the battledore part 22 in the insulating cover 1. can do.

[About the configuration that allows connection confirmation]
By the way, in normal connection work, when a worker connects the terminal 20 of the cable 10 to the terminal mounting plate 42 of the terminal mounting portion 41 of the device 40 or the expansion bar 30, the worker must tighten the tightening bolt with the appropriate torque. After tightening, lines are drawn at the connection points, ie, the battledore portions 22 of the terminals 20 and the tightening bolts.
Furthermore, another worker may check the tightening of the tightening bolts at the connection points, etc., and draw a line to intersect with that line.

In this way, when the terminal 20 is connected to the terminal mounting plate 42 and the expansion bar 30 as specified, as shown in FIG. (including the connection point α) is marked with an x mark.
By looking at the x mark, it can be confirmed that the terminal 20 has been connected to the terminal mounting plate 42 and the expansion bar 30 as specified.

Also, if the line drawn on the battledore portion 22 of the terminal 20 and the line drawn on the tightening bolt B are misaligned, as shown at the connection point α in the lower left of FIG. For example, it can be seen that the tightened bolt B is loosened.
However, in each of the embodiments described above, the connection point α between the expansion bar 30 and the battledore portion 22 is covered by the insulating cover 1, so that it may not be possible to confirm the cross mark at the connection point α. In other words, it may not be possible to confirm the connection.

Therefore, it is possible to make a part of the insulating cover 1 transparent so that the connection point α between the expansion bar 30 and the battledore part 22 can be visually recognized through the transparent part.
The same applies to any of the configurations described above and the configurations described below, but specifically, for example, in the configuration shown in FIG. 8, as shown in FIG. It is possible to make the upper part, ie, the part 1a facing the connection point α, transparent. Note that in each of the figures after FIG. 15(a), the description of the x mark written at the connection point α is omitted.

Furthermore, as shown in FIG. 15(b), it is possible to make the part around the connection point α of the insulating cover 1 transparent, or as shown in FIG. 15(c), the entire insulating cover 1 can be made transparent. You can also do this.
In addition, when providing the cut 2, protrusion 3, and hole 4 in the insulating cover 1, if the cut 2, protrusion 3, and hole 4 are provided above the connection point α as shown in FIG. 8, they will get in the way and prevent the connection. Since it becomes difficult to visually recognize the location α, it is desirable to provide them at a position where they do not get in the way, such as on the side of the connection location α, as shown in FIGS. 15(a) to 15(c).

Further, in the insulating cover 1 shown in FIG. 7, at least the partial cover 1A disposed around the connection point α may be made transparent. Further, if at least the upper portion 1C of the insulating cover 1 shown in FIG. 9(b) is made transparent, the upper portion of the connection point α of the insulating cover 1 can be made transparent as shown in FIG.
Therefore, even with this configuration, it is possible to make part or the whole of the insulating cover 1 transparent, and to make the connection point α between the expansion bar 30 and the battledore part 22 visible through the transparent part. Become.

It goes without saying that in configurations other than the above, it is possible to configure part or all of the insulating cover 1 to be transparent.
Further, it is also possible to apply a configuration in which a part or the whole of the insulating cover 1 is made transparent to a configuration that allows the tightening bolt B to be retightened as described below.

[About the configuration that allows tightening bolts to be retightened]
On the other hand, when retightening the tightening bolt B at the connection point α between the expansion bar 30 and the battledore portion 22, the insulating cover 1 may get in the way.
In that case, for example, the following configuration makes it possible to retighten the tightening bolt B at the connection point α.

[Configuration A]
For example, by folding back the portion of the insulating cover 1 around the connection point α to expose the connection point α, the tightening bolt B at the connection point α can be retightened.
At that time, for example, if a lug 6 is formed at the end of the insulating cover 1 on the connection point α side as shown in FIG. 17(a), the operator can easily hold the lug 6. As shown in (b), the insulating cover 1 can be folded back.

With this configuration, the insulating cover 1 is folded back to expose the connection point α, and the tightening bolt B at the connection point α can be retightened.
Note that even when the insulating cover 1 is configured to have an opening 5 as shown in FIG. 10 etc., it is possible to similarly configure the insulating cover 1 so that it can be folded back.

[Configuration B]
Further, as shown in FIG. 18(a), a slit 7 is provided in the insulating cover 1 to form a lid portion 8, and the lid portion 8 is configured to be turned up as shown in FIG. 18(b). It is also possible to do so.
With this configuration, it becomes possible to flip up the lid portion 8 of the insulating cover 1 to expose the connection point α, and retighten the tightening bolt B at the connection point α.
Note that even when the insulating cover 1 is configured to have an opening 5 as shown in FIG. 10 etc., it is possible to similarly configure the insulating cover 1 so that it can be turned up.

In addition, when forming the lid part 8 by providing the slit 7 in the insulating cover 1 as described above, for example, if the slit 7 is formed horizontally in the insulating cover 1 as shown in FIG. There is a possibility that a short circuit may occur between the cable 10 and other cables 10 (not shown) via the slit 7.
Therefore, in such a case, it is possible to form a slit 7 perpendicularly in the insulating cover 1, as shown in FIG. 19(b). With this configuration, even if other cables 10 or the like are adjacent to each other in the horizontal direction, it is possible to prevent a short circuit from occurring between the cables 10 and the like through the slits 7.

Moreover, if the lid part 8 is turned up as shown in FIG. 18(b), the lid part 8 may not return to its original state.
Therefore, if the slit 7 is formed, for example, in a V-shape as shown in FIG. 20(a) or in a step-like shape as shown in FIG. When the lid part 8 is opened, the lid part 8 can be held down by the edge of the slit 7, and it is possible to prevent the returned lid part 8 from being turned up again.

Further, as shown in FIG. 21, for example, it is also possible to provide a projection 9A on the lid 8 of the insulating cover 1 and a hole 9B at the edge of the slit 7.
With this configuration, by engaging and fixing the protrusion 9A with the hole 9B, it becomes possible to prevent the returned lid portion 8 from being turned up again.

It goes without saying that the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the spirit of the present invention.

1 Insulating cover 1A, 1B Partial cover 1C Upper part (first part)
1D lower part (second part)
2 Cut 3 Protrusion 4 Hole 5 Opening 6 Ear-like piece 7 Slit 8 Lid 10 Cable (wire/cable)
11 Conductor 12 Sheath 20 Terminal 21 Connection cylinder part 22 Battledore part 30, 30a to 30c Expansion bar 40 Instrument 40A Terminal block (instrument)
40B Breaker (equipment)
41 Terminal mounting part 42 Terminal mounting plate W Wall α Connection point

In order to solve the above problem, the invention according to claim 1 ,
A sheath of an electric wire/cable, a conductor of the electric wire/cable exposed from an end of the sheath, a connecting cylinder portion of a terminal connected to the conductor, a battledore portion of the terminal, and a terminal mounting portion of the terminal mounting portion. An insulating cover that is attached to cover the outer periphery of a connection point between an extension bar that connects a board and the terminal and the battledore part,
It is configured to be attached to a plurality of the electric wires/cables connected to the plurality of terminal attachment plates provided in the terminal attachment part through the expansion bar and the terminal, respectively,
The width of the expansion bar at the terminal attachment portion of the terminal attachment plate is smaller than the width of the battledore portion where the expansion bar is covered with the insulating cover.

The invention according to claim 2 is the insulating cover according to claim 1, which is composed of a plurality of cylindrical partial covers, and the plurality of partial covers are partially overlapped or not overlapped, and the electric wire is・Constructed by attaching the cables side by side in the axial direction.

According to a third aspect of the invention, in the insulating cover according to the first aspect, a cut extending in the axial direction of the electric wire/cable is provided, and the cut is widened to remove the wire from the sheath of the electric wire/cable. It is attached by covering the area up to the connection point from the outside.

According to a fourth aspect of the invention, in the insulating cover according to the third aspect, a protrusion is provided on one side of the cut, and a hole is formed on the other side, so that the electric wire/cable can be removed from the sheath. It is fixed by engaging the protrusion with the hole while covering the portion up to the connection point from the outside.

The invention according to claim 5 is the insulating cover according to claim 1, which includes a first part and a second part each having an opening continuous in the axial direction, and wherein the first part and the second part each have a continuous opening in the axial direction. The electric wire/cable is mounted so that the portion from the sheath to the connection point is sandwiched between the wires and cables, with the wires and cables partially overlapping or not overlapping.

According to a sixth aspect of the invention, in the insulating cover according to any one of claims 1 to 5 , an opening is provided on a side facing a wall to which a device having the terminal attachment portion is attached. .

According to a seventh aspect of the invention, in the insulating cover according to any one of claims 1 to 5 , a part or the whole is transparent, and the expansion bar and the insulating cover are connected to each other through the transparent part. The connection point with the battledore portion is visible.

According to an eighth aspect of the invention, in the insulating cover according to any one of the first to fifth aspects, a lug-like piece is formed at an end on the connection point side.

The invention according to claim 9 is the insulating cover according to any one of claims 1 to 5 , wherein a slit is provided to form a lid, and the lid can be turned up. It is configured as follows.

The invention according to claim 10 is
A method for protecting a connection point between an electric wire/cable and an expansion bar, which protects a connection point between an electric wire/cable and an expansion bar of a terminal mounting plate of a terminal mounting portion, the method comprising:
The insulating cover includes a sheath of the electric wire/cable, the conductor of the electric wire/cable exposed from the end of the sheath, a connecting tube part of the terminal connected to the conductor, and a battledore part of the terminal. , for covering the outer periphery of the connection point between the expansion bar and the battledore part,
The insulating cover is attached to each of the plurality of electric wires/cables connected to the plurality of terminal mounting plates provided in the terminal mounting portion through the expansion bar and the terminal, respectively,
The width of the expansion bar at the terminal attachment portion of the terminal attachment plate is smaller than the width of the battledore portion where the expansion bar is covered with the insulating cover.

The invention according to claim 11 is the method for protecting a connection point between an electric wire/cable and an extension bar according to claim 10 , wherein the outer periphery is connected to the terminal mounting plate of the extension bar with an insulating cover. The insulating cover is covered so that a portion thereof protrudes from the insulating cover.

In order to solve the above problem, the invention according to claim 1,
A sheath of an electric wire/cable, a conductor of the electric wire/cable exposed from an end of the sheath, a connecting cylinder portion of a terminal connected to the conductor, a battledore portion of the terminal, and a terminal mounting portion of the terminal mounting portion. An insulating cover that is attached to cover the outer periphery of a connection point between an extension bar that connects a board and the terminal and the battledore part,
It is configured to be attached to a plurality of the electric wires/cables connected to the plurality of terminal attachment plates provided in the terminal attachment part through the expansion bar and the terminal, respectively,
The width of one end portion of the expansion bar located on the terminal attachment portion side of the terminal attachment plate is smaller than the width of the other end portion of the expansion bar overlapping the battledore portion .

The invention according to claim 10 is
A method for protecting a connection point between an electric wire/cable and an expansion bar, which protects a connection point between an electric wire/cable and an expansion bar of a terminal mounting plate of a terminal mounting portion, the method comprising:
The insulating cover includes a sheath of the electric wire/cable, the conductor of the electric wire/cable exposed from the end of the sheath, a connecting tube part of the terminal connected to the conductor, and a battledore part of the terminal. , for covering the outer periphery of the connection point between the expansion bar and the battledore part,
The insulating cover is attached to each of the plurality of electric wires/cables connected to the plurality of terminal mounting plates provided in the terminal mounting portion through the expansion bar and the terminal, respectively,
The width of one end of the expansion bar located on the terminal attachment portion side of the terminal attachment plate is smaller than the width of the other end of the expansion bar overlapping the battledore portion.

Claims (12)

A sheath of an electric wire/cable, a conductor of the electric wire/cable exposed from an end of the sheath, a connecting cylinder portion of a terminal connected to the conductor, a battledore portion of the terminal, and a terminal mounting portion of the terminal mounting portion. an insulating cover that is attached to cover the outer periphery of a connection point between an extension bar that connects the board and the terminal and the battledore section; The insulating cover according to claim 1, wherein the insulating cover is attached to each of the plurality of electric wires/cables connected to the plurality of terminal mounting plates provided in the terminal mounting part via the expansion bar and the terminal, respectively. . Claim 1 or claim 1, wherein the electric wire/cable is constructed of a plurality of cylindrical partial covers, and the plurality of partial covers are mounted side by side in the axial direction of the electric wire/cable, with or without partially overlapping each other. Insulating cover according to item 2. A cut extending in the axial direction of the electric wire/cable is provided, and the electric wire/cable is installed by expanding the cut so as to cover a portion of the electric wire/cable from the sheath to the connection point from the outside. The insulating cover according to claim 2. A protrusion is provided on one side of the cut, and a hole is formed on the other side, and the protrusion is inserted into the hole while the portion of the electric wire/cable from the sheath to the connection point is covered from the outside. The insulating cover according to claim 4, wherein the insulating cover is fixed by engaging. It is composed of a first part and a second part each having an opening continuous in the axial direction, and the first part and the second part cover the part of the electric wire/cable from the sheath to the connection point. 3. The insulating cover according to claim 1 or 2, which is configured to be mounted so as to be sandwiched in a partially overlapping state or in a non-overlapping state. The insulating cover according to any one of claims 1 to 6, wherein an opening is provided on a side facing a wall to which a device having the terminal attachment portion is attached. According to any one of claims 1 to 7, the part or the whole is transparent, and the connection point between the expansion bar and the battledore part is visible through the transparent part. insulation cover. The insulating cover according to any one of claims 1 to 8, wherein an ear-like piece is formed at the end on the connection point side. The insulating cover according to any one of claims 1 to 8, wherein a slit is provided to form a lid, and the lid is configured to be able to be turned up. A method for protecting a connection point between an electric wire/cable and an expansion bar, which protects a connection point between an electric wire/cable and an expansion bar of a terminal mounting plate of a terminal mounting portion, the method comprising:
The insulating cover includes a sheath of the electric wire/cable, the conductor of the electric wire/cable exposed from the end of the sheath, a connecting tube part of the terminal connected to the conductor, and a battledore part of the terminal. A method for protecting a connection point between an electric wire/cable and an expansion bar, the method comprising: covering the outer periphery of the connection point between the expansion bar and the battledore portion. The method for protecting a connection point between an electric wire/cable and an extension bar according to claim 11, wherein the outer periphery is covered with an insulating cover so that a portion of the extension bar that is connected to the terminal mounting plate protrudes from the insulating cover. .

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