JP2023009799A - Cable coating stripper - Google Patents

Abstract

A coating stripping tool capable of cutting a coating without exposing a live part and stripping the coating without using a pinching tool such as pliers is provided. A typical configuration of a cable coating stripping tool 100 according to the present invention comprises a receiving piece 300 and a pushing piece 400 for sandwiching a cable 10, and a clamp 200 pressing the pushing piece toward the receiving piece. , two semicircular horizontal blades 310, 410 perpendicular to the axial direction of the cable are arranged on each of the receiving piece and the pushing piece at both ends of the stripping range, and at least one of the receiving piece or the pushing piece , the vertical blade 320 parallel to the cable axis is arranged at a position shifted from the cable axis so as not to contact the conductor 12 at the center of the cable. [Selection drawing] Fig. 3

Description

The present invention relates to stripping tools for cables.

Conventionally, when stripping the coating of a CV cable in a low-voltage power supply, it has been done manually using an electrician's knife. However, when the coating is removed, the charging part is exposed and the electric knife itself becomes the charging part, so there is a safety issue.

As a prior art, Patent Document 1, for example, discloses a coating stripping tool having a structure similar to a pipe cutter. The cable coating stripping tool described in Patent Document 1 cuts the coating in the circumferential direction when the rotary blade unit is positioned perpendicular to the axial direction of the cable, and spirals the coating when the rotary blade unit is positioned obliquely. can be cut into shapes. Then, a spiral cut is made from the cut line toward the end of the cable, and the tip of the spirally cut coating is grasped with pliers or the like and pulled while peeling off the coating at the cut line in the circumferential direction. It is stated that it can be quickly and easily stripped from the strip in the form of a series of spiral strips.

JP 2012-244889 A

However, in the coating stripping tool described in Patent Document 1, although the tool can be used for round cutting and vertical cutting (spiral cutting in Patent Document 1), separate pinching tools are required to strip the coating (insulator) from the conductor. There is an annoyance that it cannot be peeled off without using (pliers, etc.). In addition, there are problems that the pliers and the like become charged parts during live-line work, and that the working time varies greatly depending on the skill of the operator.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a coating stripping tool capable of cutting into the coating without exposing the live part and stripping off the coating without using a pinching tool such as pliers. and

In order to solve the above problems, a representative configuration of the cable coating stripping tool according to the present invention comprises a receiving piece and a pressing piece that sandwich the cable, and a clamp that presses the pressing piece toward the receiving piece, Two semi-circular horizontal blades perpendicular to the axial direction of the cable are arranged on each of the receiving piece and the pushing piece at both ends of the stripping range. It is characterized in that the longitudinal blade parallel to the direction is arranged at a position shifted from the axis of the cable so as not to contact the central conductor of the cable.

According to the above configuration, by pressing the pushing piece against the receiving piece and causing the horizontal blade and the vertical blade to cut, the coating can be sliced into slices and longitudinally at once. And since the vertical blade is shifted from the axis of the cable, the vertical blade can raise the coating (sheath and insulator) when cutting (peeling from the conductor), and after the tool is released, the vertically cut part of the insulator can be removed. open. As a result, the longitudinally cut portion can be gripped by hand and easily peeled off without the use of a clipping tool. Furthermore, since the vertical blade is shifted from the axial center of the cable, the cable rotates slightly when pushing the push piece, which facilitates cutting by the horizontal blade.

It is preferable that the receiving piece and the pushing piece are provided with a protective cover made of insulating resin. Thereby, it is possible to prevent the charged portions (horizontal blade and vertical blade) from being exposed.

The length of the vertical blade is preferably such that the edge of the vertical blade comes closest to the axis of the cable when the horizontal blade cuts into the cable coating the most. As a result, a deep cut can be made without damaging the conductor as much as possible.

Further, the vertical blade is preferably inclined in the direction of peeling off the cut coating with respect to the relative moving direction of the receiving piece and the pushing piece. This makes it possible to widen the opening of the vertically cut portion, making it easier to grasp by hand.

According to the present invention, it is possible to provide a coating stripping tool that can cut into the coating without exposing the live part and can strip the coating without using a pinching tool such as pliers. can.

1 is an exploded view of the main configuration of a coating stripping tool according to this embodiment; FIG. Fig. 2 is an assembly diagram of the coating stripping tool; It is the figure which abbreviate|omitted the display of the cover of a coating stripping tool. It is a figure which shows the state before notching of a receiving piece, a push piece, and a cable. FIG. 10 is a diagram showing a state in which the receiving piece and the pushing piece have cut into the covering of the cable; FIG. 4 illustrates a cable with a notch;

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in these embodiments are merely examples for facilitating understanding of the invention, and do not limit the invention unless otherwise specified. In the present specification and drawings, elements having substantially the same functions and configurations are denoted by the same reference numerals to omit redundant description, and elements that are not directly related to the present invention are omitted from the drawings. do.

FIG. 1 is an exploded view of the main configuration of a coating stripping tool 100 according to this embodiment. 2A and 2B are assembly diagrams, FIG. 2A shows a state in which the clamp is open, and FIG. 2B shows a state in which the clamp is closed. FIGS. 3A and 3B are diagrams omitting the display of the cover, FIG. 3A being a diagram showing a state in which the clamp is open and FIG. 3B is a diagram showing a state in which the clamp is closed.

As shown in FIG. 1, the coating stripping tool 100 according to the present embodiment includes a receiving piece 300 and a pressing piece 400 that sandwich the cable 10 (see FIGS. 4 and 6), and the pressing piece 400 toward the receiving piece 300. and a clamp 200 for pressing. In this embodiment, the cable 10 is a CV cable (Cross-linked polyethylene insulated vinyl sheath cable), and has an insulator 14 made of crosslinked polyethylene outside the conductor 12 and a vinyl sheath 16. ing. Hereinafter, the insulator 14 and the sheath 16 are collectively referred to as a covering.

A frame 210 of the clamp 200 has a linear rail groove 220 formed in the longitudinal direction and an upper jaw 230 formed at one end. A block 240 at the end opposite the upper jaw 230 has an internal thread 242 into which a bolt 252 is screwed. A lower jaw 250 is rotatably supported inside the bolt 252 and a handle 254 is attached to the outside of the bolt 252 . The lower jaw 250 has a slider 256 that slidably fits in the rail groove 220 . Therefore, when the handle 254 is turned to rotate the bolt 252 , the lower jaw 250 can be moved apart from the upper jaw 230 .

Two pins 260 are provided near the upper jaw 230 of the frame 210 and can be fitted into boss holes (not shown) of the receiving piece 300 . A stopper 262 is provided on the top of the upper jaw 230 to prevent the receiving piece 300 fitted on the pin 260 from coming off. Similarly, the slider 256 of the lower jaw 250 is provided with two pins 270 which can be fitted into boss holes (not shown) of the push piece 400 . A stopper 272 is provided on the top of the lower jaw 250 to prevent the push piece 400 fitted to the pin 270 from falling off.

As shown in FIG. 3, the receiving piece 300 is provided with two lateral blades 310 having semicircular edges. The two horizontal blades 310 are arranged in a direction orthogonal to the axial direction of the cable 10 and at both end positions of the stripping range of the coating.

Similar to the receiving piece 300, the pushing piece 400 is provided with two lateral blades 410 having semicircular edges. The two horizontal blades 410 are arranged in a direction orthogonal to the axial direction of the cable 10 and at both end positions of the stripping range. The horizontal blade 310 of the receiving piece 300 and the horizontal blade 410 of the push piece 400 are positioned to face each other (the facing position). A cutting line 20 (see FIG. 6) is cut into the sheath 16).

Further, a vertical blade 320 parallel to the axial direction of the cable 10 is attached to the receiving piece 300 . The width of the vertical blades 320 corresponds to the length of the stripping area, ie the distance between the two horizontal blades 310 . Longitudinal blade 320 cuts longitudinal cut line 30 (see FIG. 6) into the covering (insulator 14 and sheath 16) of cable 10 .

4A and 4B are diagrams showing the state of the receiving piece 300, the pushing piece 400 and the cable 10 before cutting, FIG. 4(a) being a side view and FIG. 4(b) being a front view. FIG. 5 is a diagram showing a state in which the sheath of the cable is cut. FIG. 6 is a diagram illustrating a notched cable.

As shown in FIG. 4 , the vertical blade 320 is shifted parallel to the axis of the cable 10 with respect to the movement direction of the push piece 400 and arranged at a position where it does not contact the conductor 12 at the center of the cable 10 . . That is, the vertical blade 320 does not cut directly into the conductor 12, but cuts across the conductor 12 as shown in FIG.

As shown in FIG. 5, when the pushing piece 400 hits the receiving piece 300, the horizontal blades 310, 410 and the vertical blade 320 stop cutting. The dimensions of the side blades 310 , 410 are adjusted such that their edges do not reach the conductor 12 . The length of the vertical blade 320 is the length at which the edge of the vertical blade 320 comes closest to the axial center of the cable 10 when the horizontal blades 310, 410 cut most into the covering (insulator 14, sheath 16) of the cable 10. Preferably. Closest means that the radial distance from the axis of the cable 10 is the shortest. As a result, a deep cut can be made without damaging the conductor 12 as much as possible.

Further, the vertical blade 320 is inclined with respect to the movement direction of the push piece 400 in the direction of peeling off the cut coating. A suitable rake angle α of inclination of the vertical blade 320 is 14°. An angle of 14° is the optimum angle that, together with the rotation of the cable 10, allows the stripping of the insulation 14 without contacting the conductors 12.

According to the above configuration, the pressing piece 400 is pressed against the receiving piece 300, and the horizontal blades 310, 410 and the vertical blade 320 are cut, so that the covering (the insulator 14 and the sheath 16) is sliced and longitudinally cut at once. It can be carried out.

Since the vertical blade 320 is shifted from the axis of the cable 10, the vertical blade 320 can raise the covering (peeling off from the conductor 12) during cutting, and the vertically cut portion of the insulator 14 opens after the tool is released. .

As shown in FIG. 6 , the cable 10 is formed with a cross cutting line 20 by the horizontal blades 310 and 410 and a vertical cutting line 30 by the vertical blade 320 . One of the vertical cut lines 30 is lifted from the cable 10 by the vertical blade 320 to form a tab-shaped vertical cut portion 32 .

As a result, the vertically cut portion 32 can be grasped by hand, and can be easily stripped off without using a pinching tool such as pliers. In particular, since the vertical blade 320 is inclined with respect to the push piece 400, it is possible to widen the opening of the vertical cut portion 32 and to make it easier to grasp by hand.

Thus, according to the present invention, the coating (insulator 14, sheath 16) can be cut without exposing the live portion, and the coating can be stripped off without using a pinching tool such as pliers. It is possible to provide a coating stripping tool capable of

In addition, since the vertical blade 320 is shifted from the axis of the cable 10, the cable 10 rotates slightly when pushing the push piece 400, which also has the effect of facilitating cutting by the horizontal blades 310, 410. ing.

Further, as shown in FIGS. 1 and 2, the receiving piece 300 has side covers 330 made of insulating resin on the side surfaces thereof. The side cover 330 is provided with a notch 332 into which the cable 10 is inserted. A protective cover 340 made of a transparent insulating resin is provided on the front surface of the receiving piece 300 . As a result, the work can be performed while observing the state of the cut.

On the other hand, a slide cover 420 made of insulating resin is provided on the side surface of the push piece 400 . The slide cover 420 is biased toward the receiving piece 300 as shown in FIG. 2(a) by a spring 422 (see FIG. 4(b)). When the push piece 400 contacts the receiving piece 300, the slide cover 420 contacts the side cover 330 and slides backward as shown in FIG. 2(b).

These side cover 330 , protective cover 340 , and slide cover 420 can prevent the live parts (horizontal blades 310 , 410 and vertical blades 320 ) from being exposed during work using the coating stripping tool 100 . Therefore, worker safety can be ensured.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is obvious that a person skilled in the art can conceive of various modifications or modifications within the scope described in the claims, and these also belong to the technical scope of the present invention. Understood.

INDUSTRIAL APPLICABILITY The present invention can be used as a coating stripping tool for CV cables.

DESCRIPTION OF SYMBOLS 10... Cable, 12... Conductor, 14... Insulator, 16... Sheath, 20... Cutting line, 30... Vertical cutting line, 32... Vertical cutting part, 100... Tool, 200... Clamp, 210... Frame, 220... Rail groove , 230... upper jaw, 240... block, 242... female screw, 250... lower jaw, 252... bolt, 254... handle, 256... slider, 260... pin, 262... stopper, 270... pin, 272... stopper, 300... receiving piece , 310... Horizontal blade, 320... Vertical blade, 330... Side cover, 332... Notch, 340... Protective cover, 400... Push piece, 410... Horizontal blade, 420... Slide cover, 422... Spring

Claims (3)

In a cable stripping tool,
a receiving piece and a pushing piece that sandwich the cable;
a clamp that presses the push piece toward the receiving piece,
Two semicircular horizontal blades perpendicular to the axial direction of the cable are arranged on the receiving piece and the pushing piece at both ends of the stripping range,
Further, at least one of the receiving piece or the pushing piece has a vertical blade parallel to the axial direction of the cable, which is shifted from the axis of the cable and arranged at a position where it does not come into contact with the conductor at the center of the cable. cable stripping tool. 2. The cable coating according to claim 1, wherein the vertical blade has a length such that the edge of the vertical blade comes closest to the axial center of the cable when the horizontal blade cuts most into the cable coating. stripping tool. 3. The cable stripping tool according to claim 1, wherein the vertical blade is inclined in a direction of stripping the cut sheath with respect to the direction of relative movement of the receiving piece and the pushing piece. .

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