JPS6345795Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a restraining clamp used when securing a power transmission line to a steel tower or the like.

A conventional restraining clamp consists of a steel sleeve into which the end of a power transmission line is inserted and crimped, an aluminum sleeve which is fitted and crimped on the outside of the steel sleeve, and a jumper socket which has a jumper wire connection part and is fitted into the base of the aluminum sleeve. However, the present invention features this type of retaining clamp with a structure that not only strengthens the connection between the jumper socket and the aluminum sleeve, but also allows the relative fixation angle to be easily determined when the two are connected. It is something.

An example will be described below with reference to the drawings. The steel sleeve 1 is compressed after the end of the power transmission line W is inserted, and the aluminum sleeve 2 is fitted onto the outside of the steel sleeve 1 and crimped thereto.

The base of the aluminum sleeve 2 has an annular recess 2a having a substantially V-shaped cross section and tapered surfaces on both sides.

The jumper socket 3 has a connecting part 3c for the jumper wire J, and the joined part of the upper half is fitted into the base of the aluminum sleeve 2 and tightened with a bolt. An annular convex portion 3a having a convex cross section and a tapered surface corresponding to the annular concave portion of the aluminum sleeve 2 is formed on the inner periphery of the coupling portion of the jumper socket.

In another embodiment shown in FIGS. 6 to 8, a concavo-convex strip 2b extending in the wire extension direction is formed on one tapered surface of the base of the aluminum sleeve 2, and one tapered surface of the inner periphery of the joint portion of the jumper socket is formed. A concavo-convex strip 3b that meshes with this is formed.

The restraining clamp of the present invention configured as described above is such that the power transmission line W having the steel sleeve 1 and the aluminum sleeve 2 crimped to the end is temporarily restrained to the tower using a come-along or the like, and the jumper socket 3 is attached to the aluminum sleeve. 2 in the axial direction and tighten with bolts. In the embodiments shown in FIGS. 6 to 8, when installing the jumper socket 3, the jumper socket is rotated relative to the aluminum sleeve 2, the extending direction of the jumper wire connecting portion 3c is determined, and the uneven strip 2 is fixed.
After engaging b and 3b, tighten the bolt to fix it. After fixing, the engagement of the uneven strips 2b and 3b prevents the aluminum sleeve 2 and the jumper socket 3 from rotating relative to each other, and the engagement of the annular recess 2a and the annular protrusion 3a prevents the aluminum sleeve 2 and the jumper socket 3 from rotating.
Axial movement between the two is prevented.

In summary, the present invention provides an annular recess 2a of the aluminum sleeve 2 and an annular protrusion 3 of the jumper socket 3.
a, the mutual connection in the axial direction becomes strong, and the engagement between the uneven strip 2b of the annular recess 2a and the annular protrusion 3b facilitates adjustment of the mounting angle of the jumper socket 3 during installation. .

[Brief explanation of the drawing]

Figure 1 is a front view of the steel sleeve, Figure 2 is a front view of the aluminum sleeve, Figure 3 is a front view of the jumper socket, Figure 4 is a side view of the same, Figure 5 is a front view of the installed state, Figure 6 7 is a front view of an aluminum sleeve of another embodiment, FIG. 7 is a sectional view taken from FIG. 6, and FIG. 8 is a front view of a jumper socket. 1...Steel sleeve, 2...Aluminum sleeve, 2
a... annular recess, 2b... uneven strip, 3... jumper socket, 3a... annular protrusion, 3b... uneven strip, 3c... jumper wire connection section, J... jumper wire, W... power transmission line.

Claims (1)

[Claims for Utility Model Registration] (1) A steel sleeve that is compressively connected to the end of a power transmission line, an aluminum sleeve that is fitted and crimped on the outside of the steel sleeve, and a jumper wire connection section that is fitted into the aluminum sleeve. In a restraining clamp consisting of a jumper socket, an annular recess tapered from both sides to the center is formed in the jumper socket fitting portion of the aluminum sleeve, and an annular recess that tapers from both sides to the center is formed on the inner periphery of the aluminum sleeve fitting portion of the jumper socket. 1. A power transmission line detention clamp, characterized in that an annular convex portion having a chevron-shaped cross section and a matching taper is formed. (2) A large number of uneven lines in the longitudinal direction are formed on at least a part of the tapered surface of the annular recess of the aluminum sleeve, and a large number of uneven lines that can be engaged with each other are formed on the tapered surface of the corresponding annular convex part of the jumper socket. A power transmission line restraining clamp as set forth in claim (1) of the utility model registration.