JPH0467416B2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a wire extension clamp.

<Prior art> As shown in FIG. 3, a conventional wire extension clamp 1 includes a wire attachment portion 2, a clevis portion 3, and a wedge 4.
The wire attachment portion 2 is formed with a wire gripping chamber 6 having a tapered wall surface 5.

The clevis part 3 is a part used for connection with another wire extension clamp, and can be attached to and detached from the wire attachment part 2 by screwing, so that it can be separated from the wire attachment part 2 during installation or removal, which will be described later. It's getting old.

When attaching the wire C to the wire C, the tip of the wire C inserted into the wire gripping chamber 6 is loosened, and a wedge 4 is driven into it to press it against the tapered wall surface 5 and grip it, and conversely, To remove the electric wire C, first cut off the electric wire C together with the electric wire C from an appropriate place, and then punch out the electric wire C together with the wedge 4 from the electric wire holding chamber 6 in the direction of the arrow A using a puncher (not shown).

<Problems to be Solved by the Invention> However, if the wire C sticks firmly to the wall surface 5 of the wire gripping chamber 6 during removal, there is not much of a problem if the wire C has a steel core. However, in the case of a wire without a steel core, such as a copper wire, for example, the wire C tends to buckle, so the force of the punching tool is not transmitted well and it may be difficult to pull it out.

<Means for Solving the Problems> In order to solve the above problems, the present invention includes a wire attachment portion in which a wire gripping chamber is formed and a clevis portion that is detachable from the wire attachment portion. In a wire extension clamp in which the tip of an electric wire inserted into the wire is pressed against and held by the wall of the wire holding chamber by driving a wedge, a two-split adapter is interposed between the wall of the wire holding chamber and the electric wire. The gist is:

<Function> In other words, a two-split adapter is interposed between the wall of the wire holding chamber and the wire, and the wire is punched out along with the adapter, which is easy to pull out during punching, and then the adapter is split in half and separated from the wire. Therefore, even in the case of wires without a steel core, they can always be easily removed.

<Example> Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2. In the following, parts common or similar to those of the prior art example described above will be denoted by the same reference numerals, and redundant explanation will be omitted.

This wire extension clamp 10 includes an adapter 12 that is detachably attached to a wire gripping chamber 11. The adapter 12 is divided into two parts, that is, a symmetrical member piece 1
It is a cylindrical body formed from 2a and 12a, and its inner wall surface 13 is tapered, and the shape of its outer wall surface 14 is divided into a large diameter portion 16b and a small diameter portion 1 with a cross section 15 as a boundary.
The shape corresponds to the wall surface 16 of the wire gripping chamber 11 divided into 6s, that is, the large diameter part 14b and the small diameter part 14.
s, and fits snugly into the wire gripping chamber 11, with a portion of the small diameter portion 14s protruding from the wire gripping chamber 11. This protruding portion is covered with a rubber cover 17 to prevent stress from being applied to the electric wire C when it is bent. The step portion 15 is formed on the wall surface 16 of the wire gripping chamber 11 in order to reliably prevent the adapter 12 from coming off in the direction of arrow B, but also to avoid a tapered shape that is relatively difficult to process. be. As the material of this adapter 12, metal or plastic can be selected.

In order to attach this wire extension clamp 10 to the electric wire C, first the adapter 12 is installed in the electric wire gripping chamber 11, and then the procedure is similar to that of the conventional example described above. On the other hand, to remove it from the wire C, the procedure is almost the same as in the conventional example described above, but if the wire C buckles during punching, it will protrude from the wire gripping chamber 11. The adapter 12 and the electric wire C are punched out by punching the parts, and then the adapter 12 is divided into two and separated from the electric wire C.

In this way, in this wire extension clamp 10, the adapter 12 is interposed between the wire C and the wall surface 16 of the wire gripping chamber 11, but the frictional force between the adapter 12 and the wall surface 16 of the wire gripping chamber 11 is Since the frictional force between the electric wire C and the wall surface 16 of the wire gripping chamber 11 is smaller than the frictional force between the electric wire C and the wall surface 16 of the electric wire gripping chamber 11 when the electric wire C is in direct contact with the wall surface 16 of the electric wire gripping chamber 11, even if the electric wire does not have a steel core, But it will always be easily removable. This will become even more reliable if, as in this embodiment, if the electric wire C is buckled, it can be removed by directly hitting the adapter 12 itself.

<Effects of the Invention> As explained above, the wire extension clamp according to the present invention has a two-split adapter interposed between the wall of the wire holding chamber and the wire, and punches out the wire together with the adapter, which easily comes off during punching. Since the adapter is then split in half and separated from the electric wire, there is an advantage that even if the electric wire does not have a steel core and is prone to buckling during punching, it can always be easily removed.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a wire extension clamp according to the present invention, FIG. 2 is a schematic perspective view of an adapter, and FIG. 3 is a schematic sectional view of a conventional wire extension clamp. 1, 10... Wire extension clamp, 2... Wire attachment part, 3... Clevis part, 4... Wedge, 5, 16
...Wall surface, 6, 11... Wire holding room, 12... Adapter.

Claims (1)

[Claims] 1. Consists of an electric wire attachment part in which an electric wire gripping chamber is formed, a clevis part that is detachable from the electric wire attachment part, and a wedge, which is used to secure the tip of the electric wire inserted into the electric wire gripping chamber. A wire extension clamp which is pressed against and gripped on the wall surface of the wire gripping chamber by driving the wire, characterized in that a split adapter is interposed between the wall surface of the wire gripping chamber and the wire. .