JPH0736421Y2 - Self-supporting cable tearing tool - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a self-supporting cable tearing tool used to cut a neck portion of a self-supporting cable to separate a messenger wire portion and a cable core portion.

(Prior Art) Technical background of the invention and its problems As shown in FIG. 7, a self-supporting cable has a neck 4 with a messenger wire (support wire) 1 and a cable core 2 by an insulating sheath 3 such as polyethylene. It is configured to be integrally covered via. At the time of terminating the self-supporting cable, the neck portion is torn and a connector is attached to the cable core 2 side.

Various tools have been developed in the past for tearing the neck. In particular, the ripping work using a blade has various problems because it is dangerous and may cause unnecessary parts to be cut off or left uncut.

As a method of not using a sharp blade for this ripping, for example, there is an apparatus described in Japanese Utility Model Laid-Open No. 59-135012.
In this device, as shown in FIG. 7, a piano wire (wire) 6 is arranged so as to cross the neck portion 4 of the self-supporting cable, and this is pulled in the direction of arrow 7. The piano wire (wire) 6 itself is not a sharp blade, so there is little danger, and in order not to actually leave ears on the broken line 8,
There is an advantage that the neck portion 4 can be easily torn apart.

(Problems to be solved by the invention) However, in the above-mentioned conventional technique, since a punching needle (another tool) different from the main body is used in the neck portion in order to pass the piano wire, it takes time to make a hole. However, it is difficult to adjust the width of the curved part of the roller because it requires skill to adjust the size of the piano wire, and there is a limit to the various diameter cables. There was the inconvenience that one tool could not handle it.

(Purpose of the Invention) The present invention has been made in view of the above points. When tearing the neck portion of a self-supporting cable using a wire such as a piano wire, it is easy to use without using a separate tool. It is an object of the present invention to provide a self-supporting cable tearing tool that can be used to uniquely open a hole having a diameter for passing a piano wire in the neck and can be used without being affected by the thickness of the cable.

(Means for Solving Problems) Therefore, in the present invention, a gripping member having a grip 11 and a jaw 12 with the support shaft 30 sandwiched therebetween, and gripping the grip 11 to open and close the jaw 12 is used. There, clamps 15 and 16 for fixing the tip of the wire 14 that cuts the neck of the self-supporting cable to the tip of the jaw 12 are provided, and the self-supporting cable is provided inside in the vicinity of the tip of the jaw 12. Punching a through hole in the neck 4
In order to solve the above problems, a self-supporting cable tearing tool having a structure in which 40 is provided and a plate-shaped guide plate 60 having a predetermined length is provided on the upper and lower surfaces of the jaw 12 near the support shaft 10 is used. To do.

(Embodiment of the Invention) An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

The self-supporting cable tearing tool shown in FIG. 1 has a sandwiched shape including a pair of grips 11 and a jaw 12 with a support shaft 30 sandwiched therebetween.

15, 16 are clamps, 18 is a caulking metal fitting provided at the tip of the wire 14 (tip on one side), and 33 is a key portion.

The clamp 15 is a wire such as a piano wire as shown in FIG.
An insertion hole 57 for inserting 14 and a caulking metal accommodating portion 19 for accommodating the caulking metal 18 fixed to the tip of the wire 14.
It is configured with and.

When fixing the tip of this wire 14 to the clamp 15,
The tip of the wire 14 on the side where the caulking metal fitting 18 is not attached is inserted into the insertion hole 57 from the direction of the arrow 20 and pulled out from the tip of the clamp 15. Then, the caulking metal fitting 18 is finally accommodated in the caulking metal fitting accommodating portion 19 and its end is fixed.

As shown in FIG. 4, the clamp 16 is provided with an insertion hole 51 for inserting the wire 14 such as a piano wire. When using, insert the tip of the wire 14 into the insertion hole 51 with the arrow 22.
Insert from the direction of, and insert up to 52 in the figure
The tip of 14 is pressed and fixed by a screw mechanism 50 having a pressing plate 50a.

Reference numeral 40 denotes a punch provided on the inner side of the tip of the jaw 12, and a needle 41 implanted on one jaw 12 and a blind hole 42 for receiving the tip of the needle 41 provided on the other jaw 12. The self-supporting cable neck 4 with a wire
A through hole for inserting 14 is provided.
In this case, the diameter is such that it can penetrate the wire 14.

Reference numeral 33 indicates a key portion, which is formed integrally with the grip bar 11.

Reference numerals 60, 60 denote rectangular plate-shaped guide plates (hereinafter referred to as "guide plates") provided on the upper surface and the lower surface near the support shaft 30 of the jaw portion 12, as shown in FIG. 5 and FIG. When the neck portion 4 is torn, the tip of the guide plate 60 is placed along the upper portion of the insulator 3 of the support wire 1 or the lower portion of the insulating sheath 3 of the cable core 2, and the wire 14 with respect to the longitudinal direction of the cable core 2. The configuration is convenient for setting the angle (θ) = 5 to 30 degrees.

Here, how to use the self-supporting cable tearing tool configured as described above will be described.

As described above, the other end of the wire 14 is passed through the insertion hole 57 of the clamp 15 to fix the caulking metal fitting 18 of the wire 14 to the caulking metal fitting housing 19. Next, the jaw 12 is opened, and a punch 40 is provided in the neck 4 to provide a through hole for the wire 14 to pass through.
Pass through. Then, the other end of the wire 14 is passed through the insertion hole 51 of the clamp 16 of the jaw 12, and the tip end of the wire 14 is press-contacted and fixed by the screw mechanism 50 having the holding plate 50a as described above. Then, attach the tip of the guide plate 60 to the insulating sheath 3 of the support wire 1.
Of the cable 2 or the lower portion of the insulating sheath 3 of the cable 2 and is pulled in the direction of arrow 34 as shown in FIGS. 5 and 6, for example. In this case, since the length of the guide plate 60 is adjusted so that the wire 14 slides at an angle of about 5 to 30 degrees with respect to the longitudinal direction of the support wire 1 or the cable core 2 as described above, As shown in FIG. 7, when the guide plate 60 is placed below the insulating sheath 3 of the support wire 2, the wire 14
Is pulled by the base of the insulating sheath 3 of the cable core 2 and the neck portion 4, so that the neck portion 4 can be easily separated from the insulating sheath 3 of the cable core 2 without leaving any ears.

The guide plate 60 may be configured to be expandable and contractible, and is not limited to a rectangular shape. Further, the clamps 15 and 16 may have any structure as long as they can fix both ends of the wire 14, and further, the key portions provided on both sides of the grip 11.
33 may have various shapes such as a ring shape or a rod shape.

(Effect of the Invention) According to the self-supporting cable tearing tool of the present invention described above, a punch is used to form a wire through hole having a predetermined diameter in the neck portion, and the wire is inserted into the through hole to tear the neck portion. Can be done extremely easily and smoothly.
Also, since this tool does not use a blade, there is little danger,
If the guide plate is slid along the lower part of the insulation sheath of the cable core, the neck can be favorably separated from the insulation sheath of the cable core without leaving ears.

[Brief description of drawings]

1 is a front view of a self-supporting cable tearing tool according to an embodiment of the present invention, FIG. 2 is a left side view of FIG. 1, and FIGS. 3 and 4 are cross-sectional views of the main part of the clamp of FIG. FIGS. 5, 5 and 6 are explanatory views of the use state of FIG. 1, and FIG. 7 is an explanatory view of a self-supporting cable tearing process by a conventional method. 10 …… Support shaft 11 …… Grip 12 …… Jaw 14… Wire 15,16 …… Clamp 40 …… Punch 33 …… Key part 60 …… Guide plate

Front page continuation (72) Taisuke Ito 2-1 1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Showa Electric Wire & Cable Co., Ltd. (72) Jiro Kakuda 2-1-1 Oda Sakae, Kawasaki-ku, Kanagawa Prefecture No. 1 Showa Electric Wire & Cable Co., Ltd. (56) References Shown 59-135012 (JP, U) Shown 63-164313 (JP, U) Shown 58-47786 (JP, Y2)

Claims (2)

[Scope of utility model registration request] 1. A grip (11) and a jaw (12) sandwiching a support shaft (10), and the jaw (1) is gripped by the grip (11).
A clamp (15) for fixing the tip of a wire (14) that cuts the neck (4) of the self-supporting cable to the tip of the jaw (12),
(16) is provided, a punch (40) for forming a through hole is provided inside the neck (4) of the self-supporting cable in the vicinity of the tip of the jaw (12), and the jaw near the support shaft (10) is provided. A self-supporting cable tearing tool, characterized in that a plate-shaped guide plate (60) of a predetermined length is provided on the upper and lower surfaces of the portion (12). 2. The self-supporting cable tearing tool according to claim 1, wherein the plate-shaped guide plate (60) is configured to be expandable and contractible.