Cable Sheath Stripping Tool

Abstract

To provide a coating stripper capable of making a cut in a coating without exposing a charging part, and stripping the coating without using a pinching tool such as a pair of pliers.SOLUTION: A representative configuration of a cable coating stripper 100 according to the present invention includes a reception piece 300 and a pressing piece 400 for pinching a cable 10, and a clamp 200 for pressing the pressing piece toward the reception piece. In each of the reception piece and the pressing piece, two semicircular side blades 310, 410 which are perpendicular to the axis direction of the cable are disposed at both end positions of a stripping range. Further, in the reception piece and / or the pressing piece, a longitudinal blade 320 which is parallel with the axis direction of the cable is disposed at a position which is shifted from the axis center of the cable so as to prevent the longitudinal blade from being brought into contact with a conductor 12 located in the center of the cable.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a cable covering stripping tool.

Background Art

[0002] Conventionally, when stripping the covering of a CV cable in low-voltage power supply, it was done manually using an electrician's knife. However, when stripping the covering, in addition to the charging part being exposed, the electrician's knife itself becomes the charging part, so there are problems regarding safety.

[0003] Also, as a prior art, for example, Patent Document 1 discloses a covering stripping tool having a structure similar to a pipe cutter. The cable covering stripping tool described in Patent Document 1 can cut the covering in the circumferential direction when the rotary blade unit is in a position perpendicular to the axial direction of the cable, and can cut the covering in a spiral shape when the rotary blade unit is in an obliquely intersecting position. Then, a spiral cut is made from the cut line toward the cable end, and the tip of the spirally cut covering is grasped with pliers or the like and peeled off while pulling, so that the covering can be quickly and easily peeled off in the form of a series of spiral stripping pieces from the circumferential cut line.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the coating stripping tool described in Patent Document 1, although the tool can perform circumferential cutting and longitudinal cutting (helical cutting in Patent Document 1), there is a nuisance in that another clamping tool (such as pliers) must be used to strip the coating (insulator) from the conductor. In addition, there are problems that in live-line work, pliers or the like become the charging part, and the working time varies greatly depending on the skill of the operator.

[0006] Therefore, an object of the present invention is to provide a coating stripping tool that can make a cut in the coating without exposing the charging part and can strip the coating without using a clamping tool such as pliers.

Means for Solving the Problems

[0007] In order to solve the above problems, a typical configuration of a cable coating stripping tool according to the present invention includes a receiving piece and a pressing piece for sandwiching the cable, and a clamp for pressing the pressing piece toward the receiving piece. Two semi-circular cross blades orthogonal to the axial direction of the cable are arranged at both ends of the stripping range on the receiving piece and the pressing piece, respectively. Further, at least one of the receiving piece or the pressing piece has a longitudinal blade parallel to the axial direction of the cable, which is arranged at a position shifted from the axial center of the cable and not in contact with the central conductor of the cable.

[0008] According to the above configuration, by pressing the pressing piece against the receiving piece and cutting with the cross blade and the longitudinal blade, circumferential cutting and longitudinal cutting of the coating can be performed at once. And since the longitudinal blade is shifted from the axial center of the cable, the coating (sheath and insulator) can be lifted (peeled from the conductor) with the longitudinal blade during cutting, and the longitudinal cut portion of the insulator will open after the tool is released. As a result, the longitudinal cut portion can be easily grasped by hand, and it is possible to easily strip it without using a clamping tool. Further, since the longitudinal blade is shifted from the axial center of the cable, when the pressing piece is pushed forward, the cable rotates slightly, making it easier to cut with the cross blade.

[0009] The receiving piece and the pressing piece preferably include a protective cover made of an insulating resin. This can prevent the charging part (the horizontal blade and the vertical blade) from being exposed.

[0010] The vertical blade preferably has a length such that when the horizontal blade cuts into the cable coating most deeply, the edge of the vertical blade is closest to the cable axis. This allows for a deep cut without damaging the conductor as much as possible.

[0011] Also, the vertical blade preferably inclines in a direction to peel off the cut coating with respect to the relative movement direction of the receiving piece and the pressing piece. This can increase the opening of the vertical cut part and make it easier to grip by hand.

Advantages of the Invention

[0012] According to the present invention, it is possible to provide a coating stripping tool that can cut into the coating without exposing the charging part and can strip the coating without using a clamping tool such as pliers.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0014] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in such embodiments are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals to omit redundant description, and elements not directly related to the present invention are not shown.

[0015] FIG. 1 is an exploded view of the main configuration of the coating stripping tool 100 according to the present embodiment. FIG. 2 is an assembled view, where FIG. 2(a) shows the state where the clamp is open, and FIG. 2(b) shows the state where the clamp is closed. FIG. 3 is a view with the display of the cover omitted, where FIG. 3(a) shows the state where the clamp is open, and FIG. 3(b) shows the state where the clamp is closed.

[0016] As shown in FIG. 1, the coating stripping tool 100 according to the present embodiment includes a receiving member 300 and a pressing member 400 that sandwich a cable 10 (see FIGS. 4 and 6), and a clamp 200 that presses the pressing member 400 toward the receiving member 300. In the present embodiment, the cable 10 is a CV cable (Cross-linked polyethylene insulated Vinyl sheath cable), and has an insulator 14 made of cross-linked polyethylene and a vinyl sheath 16 outside the conductor 12. Hereinafter, the insulator 14 and the sheath 16 are collectively referred to as a coating.

[0017] The frame 210 of the clamp 200 has a longitudinally linear rail groove 220 formed therein, and an upper jaw 230 is formed at one end thereof. A female screw 242 is formed in a block 240 at the end opposite to the upper jaw 230, and a bolt 252 is screwed therein. An inner jaw 250 is rotatably supported inside the bolt 252, and a handle 254 is attached outside the bolt 252. The inner jaw 250 has a slider 256 and is slidably fitted into the rail groove 220. Therefore, when the handle 254 is turned to rotate the bolt 252, the inner jaw 250 can be separated from and brought into contact with the upper jaw 230.

[0018] Near the upper jaw 230 of the frame 210, two pins 260 are provided and can be fitted into a boss hole (not shown) of the receiving piece 300. Also, a stopper 262 is provided above the upper jaw 230 to prevent the receiving piece 300 fitted to the pin 260 from falling off. Similarly, two pins 270 are provided on the slider 256 of the inner jaw 250 and can be fitted into a boss hole (not shown) of the pressing piece 400. A stopper 272 is provided above the inner jaw 250 to prevent the pressing piece 400 fitted to the pin 270 from falling off.

[0019] As shown well in FIG. 3, two cross blades 310 having semi-circular edges are arranged on the receiving piece 300. The two cross blades 310 are arranged in a direction perpendicular to the axial direction of the cable 10 and at both end positions of the covering stripping range.

[0020] On the pressing piece 400, similarly to the receiving piece 300, two cross blades 410 having semi-circular edges are arranged. The two cross blades 410 are arranged in a direction perpendicular to the axial direction of the cable 10 and at both end positions of the stripping range. The cross blade 310 of the receiving piece 300 and the cross blade 410 of the pressing piece 400 are in opposing positions (facing positions), and by pressing the pressing piece 400 toward the receiving piece 300, a circumferential cut line 20 (see FIG. 6) is cut into the covering (insulator 14 and sheath 16) of the cable 10.

[0021] Furthermore, a vertical blade 320 parallel to the axial direction of the cable 10 is attached to the receiving block 300. The width of the vertical blade 320 matches the length of the coating stripping range, that is, the distance between the two horizontal blades 310. The vertical blade 320 cuts a longitudinal cut line 30 (see FIG. 6) into the coating (insulator 14 and sheath 16) of the cable 10.

[0022] FIG. 4 is a diagram showing the state of the receiving block 300, the pressing block 400 and the cable 10 before cutting, FIG. 4(a) is a side view, and FIG. 4(b) is a front view. FIG. 5 is a diagram showing the state where the coating of the cable is cut. FIG. 6 is a diagram illustrating the cable with the cut.

[0023] As shown in FIG. 4, the vertical blade 320 is shifted parallel from the axis of the cable 10 with respect to the moving direction of the pressing block 400 and is arranged at a position where it does not contact the central conductor 12 of the cable 10. That is, the vertical blade 320 does not cut directly into the conductor 12, but cuts so as to pass by the side of the conductor 12 as shown in FIG. 5.

[0024] As shown in FIG. 5, when the pressing block 400 hits the receiving block 300, the cuts of the horizontal blades 310, 410 and the vertical blade 320 stop. The dimensions of the horizontal blades 310, 410 are adjusted so that their edges do not reach the conductor 12. The length of the vertical blade 320 is preferably such that when the horizontal blades 310, 410 cut most deeply into the coating (insulator 14, sheath 16) of the cable 10, the edge of the vertical blade 320 is closest to the axis of the cable 10. Being closest means that the radial distance from the axis of the cable 10 is the shortest. This allows for a deep cut without damaging the conductor 12 as much as possible.

[0025] Furthermore, the vertical blade 320 is inclined in the direction of peeling off the cut coating with respect to the moving direction of the pressing block 400. The rake angle α of the inclination of the vertical blade 320 is preferably 14°. The angle of 14° is the optimal angle that, combined with the rotation of the cable 10, enables the insulator 14 to be peeled off without contacting the conductor 12.

[0026] According to the above configuration, by pressing the pusher 400 against the receiving piece 300 and causing the horizontal blades 310 and 410 and the vertical blade 320 to cut in, it is possible to perform circumferential cutting and longitudinal cutting of the coating (insulator 14 and sheath 16) at once.

[0027] And since the vertical blade 320 is shifted from the axis of the cable 10, it is possible to raise the coating (peel it off from the conductor 12) with the vertical blade 320 during cutting, and the longitudinally cut portion of the insulator 14 opens after the tool is released.

[0028] As shown in FIG. 6, a circumferential cutting line 20 is formed on the cable 10 by the horizontal blades 310 and 410, and a longitudinal cutting line 30 is formed by the vertical blade 320. And one side of the longitudinal cutting line 30 floats from the cable 10 by the vertical blade 320, and a tab-shaped longitudinally cut portion 32 is formed.

[0029] As a result, the longitudinally cut portion 32 becomes in a state where it can be grasped by hand, and it is possible to easily peel it off without using a clamping tool such as pliers. In particular, since the vertical blade 320 is inclined with respect to the pusher 400, the opening of the longitudinally cut portion 32 can be increased, and it can be made easier to grasp by hand.

[0030] Thus, according to the present invention, it is possible to provide a coating stripping tool that can make a cut in the coating (insulator 14, sheath 16) without exposing the charging portion and can strip the coating without using a clamping tool such as pliers.

[0031] In addition, since the vertical blade 320 is shifted from the axis of the cable 10, when the pusher 400 is pushed forward, the cable 10 rotates slightly, so there is also an effect that cutting by the horizontal blades 310 and 410 becomes easier.

[0032] As shown in FIGS. 1 and 2, the receiving piece 300 includes a side cover 330 made of resin having insulation on its side surface. The side cover 330 is provided with a notch 332 into which the cable 10 enters. Further, a protective cover 340 made of transparent resin having insulation is provided on the front surface of the receiving piece 300. Thus, the work can be carried out while observing the state of the cut.

[0033] On the other hand, a slide cover 420 made of resin having insulation is provided on the side surface of the pushing 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 pushing piece 400 abuts on the receiving piece 300, the slide cover 420 abuts on the side cover 330 and slides backward as shown in FIG. 2(b).

[0034] These side cover 330, protective cover 340, and slide cover 420 can prevent the charging portions (the horizontal blades 310, 410 and the vertical blade 320) from being exposed during the work using the coating stripping tool 100. Therefore, the safety of the operator can be ensured.

[0035] As described above, the preferred embodiments of the present invention have been described with reference to the accompanying drawings. Needless to say, the present invention is not limited to such examples. It is obvious that those skilled in the art can conceive of various modifications or corrections within the scope described in the claims, and it is naturally understood that they also belong to the technical scope of the present invention.

Industrial Applicability

[0036] The present invention can be used as a coating stripping tool for a CV cable.

Explanation of Reference Numerals

[0037] 10… Cable, 12… Conductor, 14… Insulator, 16… Sheath, 20… Circumferential cutting line, 30… Longitudinal cutting line, 32… Longitudinal cut portion, 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… Support piece, 310… Cross cutting edge, 320… Longitudinal cutting edge, 330… Side cover, 332… Notch, 340… Protection cover, 400… Pushing piece, 410… Cross cutting edge, 420… Slide cover, 422… Spring

Claims

1. In a cable jacket stripping tool, a receiving member and a pressing member for sandwiching the cable, and a clamp for pressing the pressing member toward the receiving member, two semi-circular cross blades orthogonal to the axial direction of the cable are arranged at both ends of the stripping range on the receiving member and the pressing member, furthermore, at least one of the receiving member or the pressing member is provided with a longitudinal blade parallel to the axial direction of the cable, which is shifted from the axis of the cable and arranged at a position not in contact with the central conductor of the cable, the longitudinal blade is inclined in a direction to peel off the cut coating with respect to the relative movement direction of the receiving member and the pressing member, and is a cable jacket stripping tool characterized by this.

2. The cable jacket stripping tool according to claim 1, wherein the longitudinal blade has a length such that the edge of the longitudinal blade is closest to the axis of the cable when the cross blade cuts most deeply into the cable jacket.

Images