JPS5812805B2 - Cable terminal insulation cutting tool - Google Patents

Description

[Detailed description of the invention] The present invention relates to a cable terminal insulation cutting tool.

When connecting cross-linked polyethylene cables, the conductor is exposed, the exposed conductor side is ground into a conical shape with a smaller diameter, the internal semiconductive layer on the conductor is peeled off, and the conductors are connected using a compression sleeve.

Next, semiconducting tape is wound around the conductor and the sleeve, and the annular space with a trapezoidal cross section between the conically cut insulators on both sides is filled by winding polyethylene tape containing a crosslinking agent. The layer is heated and melted to complete crosslinking and terminate the connection.

In the connection process mentioned above, the cutting of the insulator, called a pencil sharpener, was usually done manually with a knife, etc., but since it requires considerable force and takes a long time, various sharpening tools have been proposed. There is.

However, the conventionally proposed tools of this type have a complicated structure and are not necessarily easy to handle.

Moreover, the so-called opening to expose the conductor and the pencil sharpener described above were performed using different tools.

The present invention has been made based on the above-mentioned circumstances, and provides a cable end sharpening tool that has a simple structure, is easy to handle, and can perform both cutting and pencil sharpening at one point.

The invention will be explained in detail below with reference to the drawings.

In FIG. 1, a fixed gripping member 1 having a shallow V-shaped notch 1a faces a frame bottom plate 2 with the V-shaped notch 1a inside, and both are connected by a pair of frame side plates 3 to form a rectangular shape. A frame structure 4 is formed.

The fixed gripping member 1 is engaged with a groove 3a provided on the inner surface of the side plate 3 in the longitudinal direction of the side plate.

Further, the groove 3a has a V-shaped notch 5a opposite to the V-shaped notch 1a.
A movable gripping member 5 having a movable gripping member 5 is slidably engaged,
An adjusting screw 7 attached to a handle 6 loosely fitted to the bottom plate 2 is screwed into this member.

A handle 6' is attached to the fixed gripping member 1.

A U-shaped guide plate 8 is attached to opposite positions on the outer surfaces of both side plates 3 with its opening facing the outer surface and the plate surface parallel to the plane containing the groove 3a.

A guide holder 10' that supports a guide 10 that will be described later as well as a blade holder 9' that supports a blade 9 that will be described later.
are connected by a two-bar link formed by connecting link pieces 11 of equal length on both sides.

The connecting pin 12 at the connecting point of each link piece is engaged via a bearing 13 with a long hole 8a formed in the U-shaped guide 8 and the outer surface of the side plate.

The cutter 9 has a cutting edge 9a at the tip with an angle a matching the slope of the conical surface on which the insulator is to be cut, and a cutting edge 9b on one side edge, and the tip 10a of the guide 10 is attached to the conical surface. The surface is inclined to match the slope of the surface.

Further, the surface of the guide 10 on the side of the cutting edge 9b is slightly retracted from the cutting edge 9b.

Note that the blade 9 is fixed to the holder 9a with a screw 14, and the guide 10 is fixed to the holder 10a with a screw 15.

The fixed gripping member 1 of the frame structure is provided with a knife guide frame 16 through which a knife passes. This guide frame E is provided with a blade fixing screw 17.

The apparatus of the present invention having the above configuration is used in the following manner.

First, the frame structure 4 is engaged with the insulator (2) at the tip of the cable so that the cutting edge 9b faces the end face of the insulator.

At this time, the concave pressure of the movable gripping member 5 against the insulator 1 is set to a level that allows rotation of the frame structure 4.

The cutting tool 9 is fixed to the frame structure 4 with the screw 17 at a position where the leading edge of the cutting edge 9a protrudes to the point where it reaches the internal semiconductive layer. 4, the cutting edge 9b scrapes off the insulator ■ in the axial direction, and at this time. The cutting edge 9a scrapes off the insulator (2) in the radial direction.

This exposes the internal semi-dynamic layer S. Next, the fixation of the blade 9 is released, and the frame structure 4 is replaced with the blade edge 9b using an insulator as described above.
Rotate while pressing against the end face.

As a result, the cutting edges 9a and 9b scrape off the insulator in the same manner as described above.

Since the cutting edge 9a has an inclination that matches the inclination of the conical surface, the peripheral surface of the insulator after being scraped off has a conical shape.

As the cutting progresses in this manner, the guide 10 is pushed by the formed conical surface and moves radially outward.

As a result, each two-bar link is extended, and the blade holder 9a
The cutter 9 is therefore moved radially outwards.

In other words, the blade 9 cuts a conical surface following the conical surface formed by itself.

The situation is shown in FIG.

As mentioned above, the tool of the present invention has a simple structure and is easy to handle.

What's more, one tool can be used for both cable extraction and pencil sharpening.

[Brief explanation of drawings]

Figures 1A, B, and C are front and side views of one embodiment of the present invention;
FIG. 2 is a plan view, FIG. 2 is a perspective view of the blade, and FIG. 3 is an explanatory diagram of the cutting state. 1...Fixed gripping member. 2...Movable gripping member, 3...Side plate, 4...Frame structure, 5...
...Fixed gripping member, 6, 6'...Handle, 7...Adjustment screw, 8...U-shaped guide plate, 9...・Knives, 9a, 9b...
The cutting edge. 9'...Blade holder, 10...
Guide, 10a...Guide tip, 10'...
...Guide holder, 11...Link piece. 12
...Pin, 16...Cutter guide frame. 1
7...Screw.

Claims (1)

[Claims] 1. A rectangular frame structure formed by connecting a fixed gripping member having a shallow V-shaped notch and facing the frame bottom plate with the V-shaped notch facing inward by a pair of side plates, and both side plates of this frame structure. a movable gripping member having a V-shaped notch that is slidably engaged with and faces the V-shaped notch; a U-shaped guide plate that is attached to the side plates with openings facing the outer surfaces of both side plates of the frame structure; A knife holder that holds a knife with a cutting edge at the tip that is sloped to match the conical surface to be cut and a cutting edge on one side ridge, and a guide that has a tip that is sloped to match the conical surface to be cut. It is characterized by having a guide holder and a pair of two-bar links formed by connecting link pieces of equal length, each of which has a connecting point that engages a U-shaped guide plate and connects the sides of both front holders. Cable terminal insulation cutting tool.