JPH0347257Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a spacer used for a cable connection.

[Conventional technology and its problems]

Generally, terminals are connected to each other by bolts and nuts at connections such as straight or right-angled connections, branch connections, and terminal connections of cables having a flat or round cross-sectional shape. Conventionally, in order to insulate the material, taping was applied directly over it. Therefore, the following problems arose. That is,
The terminals are angular, the bolt heads or nuts protrude from the terminals, and there are many unevennesses, and the work of taping thereon requires skill, making it difficult and inefficient. Insulation reliability was poor. The taping part has lost its shape due to aging.

This invention solves these conventional problems.
Furthermore, even if there are variations in the dimensions of protruding bolt heads, nuts, and bolt tips,
The purpose of the present invention is to provide a spacer that can be reliably covered.

[Means for solving problems]

Therefore, the present invention provides a hole in which a protruding bolt head or a protruding nut for bolt-nut connection for connecting terminals is inserted at the connection part of the cable, and surrounds both terminals in a connected state. A pair of spacers made of an insulating material are fitted together, and a blind cap part is integrally provided at the outer opening edge of the hole so that it can be torn apart.

[Effect]

Since the outside of the terminal is surrounded by the spacer, the insulation process becomes easy and the insulation is reliable. In particular, cable connections may have angular terminal corners, or the bolt head of a bolt/nut connection.
The tip of the nut/bolt protrudes and has many irregularities, but if you surround it with a pair of insulating spacers, the outer surface can be made smooth. It becomes easy to further wrap insulating tape over this spacer, and only a small amount is required.

If the protruding dimensions of the nut, bolt head, and bolt tip vary in size, if the protruding dimensions are small, the blind cap portion of the hole remains as it is. As a result, the outer surface of the spacer is smooth and the above-mentioned tape wrapping operation can be easily performed. On the other hand, when the above protrusion dimension is large, the blind cap part can be separated from the spacer by tearing it off, and the nut, bolt head, and bolt tip can be stored in the hole to prevent them from protruding onto the outer surface of the spacer. , or the amount of protrusion can be made very small. Therefore, it becomes easy to wrap the insulating tape over it, and only a small amount is required.

〔Example〕

The illustrated embodiment will be described in detail below.

In the present invention, a connection section refers to a straight connection section or a right angle connection section where a pair of cables are connected to each other at a predetermined angle such as a straight line or at a right angle, and a branch cable that branches out from the middle of the cable. branch connection,
Furthermore, it refers to the terminal connection part that connects the end of the cable to a metal fitting for hanging, etc. First, in Figures 1 to 5, a branch connection part is illustrated as connection part A, and then In FIGS. 15 to 16, a right-angled connection portion is illustrated as the connection portion A.

In Figures 1 and 2, 1 is the trunk cable, 2
is a branch cable, in which a predetermined length of the jacket layer is peeled off from the middle of the main cable 1 with a flat cross section, and the conductor 3
is exposed, a branch terminal 4 is fixed thereto, and the branch terminal 4 is provided to protrude from the main cable 1 in the lateral direction (in the illustrated example, the direct connection direction). As shown in FIGS. 1 to 3, the tip 5 of the branch terminal 4 is a rectangular flat overlapping piece 6 having four bolt holes.

The branch cable 2 is shown as a horizontal main line with a flat cross section, and has a compression part 8 into which the conductor protrusion 7 exposed from the end 2a is fitted and crimped, and a rectangular flat plate with four bolt insertion holes formed therethrough. A crimp terminal 10 having a shaped overlapping piece portion 9 is fixed to the end portion 2a of the branch cable 2, as shown in FIGS. 1 to 3.

The overlapping piece part 9 of this crimp terminal 10 and the overlapping piece part 6 of the branch terminal 4 are overlapped with each other and fastened with a bolt/nut connection 11.

As shown in FIGS. 1 and 2 and FIGS. 6 to 8, a pair of spacers 12, 12 made of an insulating material such as rubber or plastic are attached to the tip 5 of the branch terminal 4, and The overlapping piece portion 9 of the crimp terminal 10 is attached in a surrounding manner from both the front and back sides. In other words, the spacer 12 is half-shaped and used together. Specifically, the spacer 12 has a recess 13 into which the tip portion 5 or the crimp terminal 10 is fitted, and the recess 13 has square corner portions 14, corresponding to the overlapping pieces 6, 9. 14 is formed in the inner part (see Fig. 6), and a substantially rectangular base part 16 formed by protruding from three sides.
It is formed.

The thickness dimension M of the protruding wall portions 15, 15 on the left and right side edges,
The thickness N of the inner protruding wall portion 15 is set to be sufficiently large, for example, the depth h of the recess 13, that is, the thickness T- of the overlapped pieces 6 and 9 in FIG. In contrast, set it to a sufficiently large value as shown in the following formula.

0.5×h≦M≦2.0×h … 0.5×h≦N≦2.0×h … Also, the inner diameter D of the four circular holes 17 that are penetrated through the base portion 16 is determined by the bolt/nut connection. The diameter of the hexagonal circumscribed circle of the bolt head 18 and nut 19 shown in FIG. Like a square, it is press-fitted into the hole 17 and is prevented from rotating. FIG. 9 shows the bolt head 18 (or nut 19) press-fitted into the hole 17 in this way. Spacer 1
2 is made of rubber such as ethylene propylene rubber or insulating material such as plastic, and as shown in Figure 9, it is slightly elastically deformed and the bolt head 18 (or nut 19) is inserted to prevent rotation. .

Therefore, in the spacer 12, the overlapping piece portion 6,
As shown in Figure 6, the part covering the corner of No. 9 is
Rounded portions 20, 20 with a sufficiently large radius of curvature R are formed. Therefore, if the rectangular corners of the overlapping pieces 6 and 9 are covered with the spacer 12, they will be given roundness with a sufficiently large radius of curvature R. For example, this radius of curvature R is set as shown in the following equation.

2.0×h≦R≦6.0×h……As shown in FIGS. 7 and 8, the opening end of the hole 17 on the recess 13 side is made larger in diameter, and the stepped portion 21 is formed so as to escape the washer. form...

Therefore, from the flat part of the recess 13 to the curved surface 22
The thickness H (to the outer surface) is determined by the protruding dimensions P of the bolt head 18, nut 19, bolt tip 29, etc., which vary widely (as described above).
That is, as shown in FIGS. 7, 8, and 12 to 14, a blind cap portion 26 is integrally provided on the outer opening edge 33 of the hole 17 so that it can be torn off and separated. The blind cap portion 26 is composed of a truncated conical portion 27 that projects inward, and a tear-off annular thin film portion 28 that is continuous around the base. The length m absorbs variations in the protruding dimensions P of the bolt head 18, nut 19, bolt tip 29, etc., that is, variations. As shown in FIGS. 7 and 14, if this protrusion dimension P is large, the blind cap portion 26 may be pulled up by the finger or by the upward force of the nut 19 when the bolt tip 29 itself is inserted. is torn off from the thin film portion 28 and separated, but even in this state, the nut 19 and the bolt tip 29 are
The thickness dimension H is determined so as not to protrude from the outer surface (curved surface 22) of the spacer 12.

In this way, when the blind cap part 26 covers the hole part 17, the outer surface of the spacer (surface curved surface 2
2) is of course smooth, and on the other hand, even when the blind cap part 26 is separated, the bolt head 18, nut 19, and bolt tip 29 do not protrude as shown in Figs. 7 and 14. , the outer surface of the spacer becomes smooth (see FIG. 1 and FIG. 5 described below).

Note that the outer surface of the spacer 12 other than the mating surface 23 side is formed into a streamlined surface curved surface 22 as a whole. In addition, the number of holes 17 is 4 in the illustrated embodiment.
You are free to increase or decrease the number of units. As shown in FIG. 6 or 7, one opening end side of the recess 13 has a sloped portion 2.
4 and 25 to form branch terminals 5 and crimp terminals 10.
Easy to insert.

Spacer 12,1 having recess 13 in this way
The mating surfaces 23, 23 of the two are brought into contact with each other, and the first
As shown in FIG. 2 and FIG.
From above the streamlined surface curved surface 22 of No. 2, insulating tapes 3
Wind 0.

As the insulating tapes 30, for example, an inner self-fusing butyl rubber tape 30a and an outer adhesive vinyl tape 30b are suitable. Although not shown in the drawings, it is preferable to form uneven portions on the mating surfaces 23, 23 that engage with each other to ensure positioning. In addition, in FIG. 2, 31 is an insulating cover.

Next, FIGS. 4 and 5, and FIGS. 10 and 11 show other embodiments. A branch terminal 4 protruding laterally from the main cable 1 has one bolt hole at its tip 5, and the branch cable 2 is thin with a round cross section and is fixed to its tip. The crimp terminal 10 also has one bolt hole, and both bolt holes are connected together by a set of bolt and nut connections 11. The branch cable 2 is connected to the branch terminal 4 in a direction perpendicular to the branch terminal 4.

The spacers 12, 12 each have a substantially hemispherical shape,
When the mating surfaces 23 and 32 are combined, they form a substantially spherical shape,
The branch terminal tip 5, the tip of the crimp terminal 10, and the bolt/nut connection 11 are covered in an encircling manner. That is, a rectangular recess 13 is formed in the mating surface 23 of the spacer 12, and the tip 5 of the branch terminal 4 is fitted into the rectangular corners 14, 14, so that the corner of the tip 5 is approximately The spacer 12 has a spherical curved surface 22
Surrounded by. In addition, as shown by imaginary lines in FIGS. 10 and 11, there is a recess 32 for the crimp terminal 10.
is formed on at least one of the pair of spacers 12, 12. A hole 17 is provided in the center of the recess 13 in a direction perpendicular to the recess 13, and the dimensions of the hole 17 are set in the same manner as described with reference to FIGS. 6 to 9.

In this example, the blind cap portion 26 is shaped like a caldera-shaped volcano. In this embodiment and other embodiments as well, this blind cap portion 2
The shape of 6 can be freely modified in various ways, and can also be semicircular, conical, or the like.

Then, as shown in FIGS. 4 and 5, from above the spacers 12 and 12, insulating tape 30
Wrap around.

Next, in FIGS. 15 and 16, a right-angled connection in which the cables 1 and 1 are connected to each other is illustrated as the connection part A, and spacers 12 and 12, which have already been explained in detail in FIGS. 6 to 9, are used. Show what you get. In FIG. 15, the upper spacer 12 leaves the blind caps 26, and the lower spacer 12 is used by separating and removing the blind caps 26.
The other configurations are the same as those of the previous embodiment.

In addition, it is of course possible to use it for connection parts of round cables and the like other than the above-mentioned flat cables.

[Effect of idea]

The present invention has the following significant effects due to the above-described configuration.

Due to variations in the thickness of the overlapping pieces of each terminal 4, 10, etc., variations in the types and dimensions of the component parts of the bolt/nut connection 11, etc., the bolt head 1
8. Even if the protrusion dimension P of the nut 19 and bolt tip 29 changes, one type of spacer can be used in common. That is, it can be handled depending on whether the blind cap portion 26 is left or removed separately.

With the blind cap portion 26 remaining, the bolt head 18, nut 19, and bolt tip 29
The end face of the cap is covered with the blind cap portion 26, making the insulation even more reliable. In addition, there is no need to fill the hole 17 with an insulating material such as self-fusing butyl rubber. Furthermore, it is easier to keep the outer surface of the spacer smooth, and it is easier to wrap the insulating tape 30 over it.

It has become possible to perform reliable insulation treatment without requiring operator skill and without individual differences.

Taping work can be done quickly and beautifully.

The amount of insulating tape 30 used can be reduced.

Insulating tapes 30 do not loosen even after a long period of use.

[Brief explanation of the drawing]

Fig. 1 is an enlarged cross-sectional view of essential parts showing one embodiment of the present invention, Fig. 2 is a cross-sectional front view, Fig. 3 is a plan view of the state before the spacer is attached, and Fig. 4 shows another embodiment. 5 is an enlarged cross-sectional view of the main part of FIG. 4, FIG. 6 is a plan view of a specific example of the spacer, and FIG.
The figure is a sectional view of FIG. 6, FIG. 8 is a sectional view of FIG. 6, FIG. 9 is an explanatory diagram of the main part, FIG. Figures 12 to 14 are enlarged cross-sectional views of main parts for explaining the action, Figure 15
The figure is a sectional front view showing another embodiment, and FIG. 16 is a sectional plan view. A... Connection part, 1, 2... Cable, 4, 10
...Terminal, 11...Bolt/nut connection, 12...
... Spacer, 17 ... Hole, 18 ... Bolt head, 19 ... Nut, 26 ... Blind cap part, 2
9... Bolt tip, 33... Outer opening edge.

Claims (1)

[Claims for Utility Model Registration] A cable connecting part that has a hole into which a protruding bolt head or a protruding nut of a bolt/nut connection for connecting terminals is inserted, and surrounds both terminals in a connected state. 1. A pair of spacers made of an insulating material that are joined together, the spacer being characterized in that a blind cap portion is integrally provided at the outer opening edge of the hole portion so as to be tearable and separable.