Cable tearing tool

Abstract

To provide a cable ripper capable of efficiently tearing a part in which a diameter of a cable is enlarged.SOLUTION: A cable ripper for tearing a sheath of a cable has a blade projecting from an inner surface of a hole into which the cable is inserted. The sheath of the cable inserted into the hole is cut by the blade when it is pulled out from the hole in an extending direction of the cable, a cross-sectional shape of the hole within a surface orthogonal to the extending direction indicates non-circular, and the hole has a space part which a deformed part of the cable inserted into the hole enters.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present disclosure relates to a cable tearing tool. [Background technology]

[0002] Patent Document 1 describes a cable stripper. The cable stripper includes a tubular grip portion in which an axial hole portion is formed, and a substantially U-shaped notch portion is formed below the tubular grip portion. A roller holder portion consisting of a ring-cutting portion and an axial arm portion is formed in the notch portion, and a roller is rotatably attached to the inner peripheral surface of the ring-cutting portion. A cutter attachment member is disposed inside the tubular grip portion, and a cutter is attached to the tip of the cutter attachment member. The cable is inserted between the roller and the cutter, and the tubular grip portion is pulled in the longitudinal direction of the cable, whereby the outer coating layer of the cable is cut along the longitudinal direction.

[0003] Patent Document 2 describes a tool for stripping a coated wire and a tool for cutting a tube material. The stripping tool is composed of a fixed holder for holding the coated wire and a rotating holder equipped with a cutter. The fixed holder is composed of a pair of clamp members that are provided so as to be freely opened and closed by a hinge. The clamp members have a pair of opposing surfaces that face each other, and a coated wire housing groove with a semicircular cross section is formed on the opposing surfaces. When the pair of clamp members are closed, a coated wire holding portion with a perfect circle shape is formed by the coated wire housing groove. The rotating holder is provided with a cutter housing portion to which a pair of cutters are attached, and a guide is housed in the cutter housing portion together with the cutters. The coated wire is attached to the rotating holder, and the coated wire is restricted by the guide immediately adjacent to the cutter and deformed into a perfect circle shape.

[0004] Patent Document 3 describes a tearing tool for drop cables. The tearing tool for drop cables includes a right separator body having a right handle and a left separator body having a left handle. The right separator body and the left separator body are pivotally connected to each other. A left fixed blade and a left movable blade are supported on the left separator body, and a right fixed blade and a right movable blade are supported on the right separator body. With a drop cable placed on the left fixed blade and the right fixed blade, the left separator body and the right separator body swing to tear the protective layer of the drop cable.

[0005] Patent Document 4 describes a method and an apparatus for removing an insulating layer or an insulating device of a cable having a non-circular cross-sectional shape. The apparatus includes a casing and an insertion pipe passed through the inside of the casing. A cross-cutting blade and a vertical-cutting blade are disposed inside the insertion pipe. The cross-cutting blade and the vertical-cutting blade each cut the insulating layer of the cable inserted into the insertion pipe. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Utility Model Application Publication No. 4-118708 [Patent Document 2] JP 2001-352634 A [Patent Document 3] JP 2005-181704 A [Patent Document 4] Special Publication No. 10-504173 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in a cable tearing tool in which a blade protrudes from the inner surface defining a hole and the blade tears the sheath of a cable that is passed through the hole, it may be difficult to pass the cable through the hole. The cable may have a portion that is expanded in diameter, for example, due to a seal being wrapped around it. The expanded portion of the cable may get caught in the hole of the cable tearing tool. In this case, the expanded portion of the cable cannot be passed smoothly through the hole, and therefore the expanded portion of the cable may not be efficiently torn.

[0008] The present disclosure aims to provide a cable tearing tool capable of efficiently tearing the enlarged portion of a cable. [Means for solving the problem]

[0009] The cable tearing tool according to the present disclosure is a cable tearing tool that tears the sheath of a cable, and is equipped with a blade protruding from the inner surface of a hole into which the cable is inserted, and the sheath of the cable inserted into the hole is cut by the blade when the cable is pulled out of the hole along the extension direction of the cable, so that the cross-sectional shape of the hole in a plane perpendicular to the extension direction is non-circular, and the hole has a space into which the deformed portion of the cable inserted into the hole enters. Effect of the Invention

[0010] According to the present disclosure, the enlarged portion of the cable can be efficiently torn apart. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view showing a cable tearing tool according to an embodiment. [Diagram 2] 1A-1C are diagrams illustrating an example of a process for tearing a cable. [Diagram 3] 2 is a side view showing a cable tearing portion and a connector disassembly portion of the cable tearing tool of FIG. 1. [Figure 4] 2 is a cross-sectional view showing the blade of the cable tearing tool of FIG. 1 and a holding part for holding the blade. FIG. [Diagram 5] 4 is a perspective view showing a state in which the connector disassembly unit in FIG. 3 is opened. [Figure 6] FIG. 2 is a perspective view showing a boot dismantling part of the cable tearing tool of FIG. 1. [Figure 7] 4 is a perspective view showing a state in which a cable is passed through a hole in the cable tearing portion of FIG. 3. FIG. [Figure 8] FIG. 8 is a cross-sectional view showing the cable, hole and blade passed through the hole of FIG. 7. [Figure 9] 4 is a perspective view showing a state in which an expanded portion of the cable is passed through a hole in the cable tearing portion of FIG. 3. FIG. [Figure 10] FIG. 10 is a cross-sectional view showing the cable, hole and blade passed through the hole of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] [Description of the embodiments of the present disclosure] First, the contents of the embodiments of the present disclosure will be listed and described. A cable tearing tool according to one embodiment of the present disclosure is a cable tearing tool for tearing a sheath of a cable, the cable tearing tool having a blade protruding from an inner surface of a hole into which the cable is inserted, the sheath of the cable inserted into the hole is cut by the blade when the cable is pulled out of the hole along the extension direction of the cable, the cross-sectional shape of the hole in a plane perpendicular to the extension direction is non-circular, and the hole has a space into which a deformed portion of the cable inserted into the hole fits.

[0013] In this cable tearing tool, a blade protrudes from the inner surface of the hole into which the cable is inserted. When the cable inserted into the hole is pulled out of the hole along the extension direction of the cable, the blade protruding from the inner surface of the hole cuts the sheath of the cable along the extension direction. Therefore, the sheath of the cable can be cut along the extension direction of the cable. The cross-sectional shape of the hole in a plane perpendicular to the extension direction of the cable is non-circular. The non-circular hole has a space into which the deformed part of the cable enters. Therefore, when the expanded part of the cable is passed through the hole and the cable is compressed by the inner surface of the hole, the deformed part of the cable can enter the space of the hole. Therefore, when the expanded part of the cable is passed through the hole and compressed, the part deformed due to the compression can be released into the space, so that the expanded part of the cable is prevented from getting caught in the hole and the expanded part can be smoothly passed through the hole. As a result, the expanded part of the cable can be efficiently torn.

[0014] The end of the hole in the extending direction may be formed with an inclined surface that gradually reduces in diameter toward the hole. In this case, the end of the hole in the extending direction is formed with an inclined surface that gradually reduces in diameter toward the hole. Therefore, the expanded portion of the cable can be smoothly inserted into the hole via the inclined surface that is larger in diameter than the hole, so that the expanded portion of the cable can be efficiently torn off with the blade.

[0015] The cross-sectional shape of the hole in a plane perpendicular to the extending direction may be elliptical, in which case the cross-sectional shape of the hole through which the enlarged portion of the cable passes can be made simpler.

[0016] The blade may protrude into the hole from the portion of the inner surface of the hole that is the smallest distance from the center of the hole in the cross-sectional shape of the hole. In this case, the blade protrudes from the portion of the inner surface of the hole that presses against the expanded portion of the cable, so the blade can easily bite into the pressed portion of the cable. This allows the blade to tear the sheath more efficiently.

[0017] A connector may be attached to one end of the cable via a boot. The cable tearing tool may further include a connector dismantling part that removes the connector from the cable, and a boot dismantling part that dismantles the boot. In this case, the sheath can be torn, the connector can be dismantled, and the boot can be dismantled using a single cable tearing tool. Therefore, the sheath can be torn and the connector and boot can be removed using a single tool, so that the cable dismantling work can be performed efficiently.

[0018] [Details of the embodiment of the present disclosure] Below, specific examples of the cable tearing tool according to the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited to the following specific examples. In the description of the drawings, the same or corresponding elements are given the same reference numerals, and duplicated descriptions are omitted as appropriate. In addition, the drawings may be partially simplified or exaggerated for ease of understanding, and the dimensional ratios and the like are not limited to those shown in the drawings.

[0019] FIG. 1 is a perspective view showing a cable tearing tool 1 according to an embodiment. As shown in FIG. 1, the cable tearing tool 1 includes, for example, a first extension 2, a second extension 3, and a hinge 4 that swingably connects the first extension 2 and the second extension 3. For example, the cable tearing tool 1 is formed by cutting a metal. As an example, the cable tearing tool 1 is made of an aluminum alloy. In this case, the cost of the cable tearing tool 1 can be reduced and the weight of the cable tearing tool 1 can be reduced. For example, each of the first extension 2 and the second extension 3 extends linearly from the hinge 4. The cable tearing tool 1 includes a cable tearing part 10, a connector disassembly part 20, and a boot disassembly part 30 between the first extension 2 and the second extension 3.

[0020] The first extension portion 2 has a first opposing surface 2b facing the second extension portion 3, and a first gripping surface 2c facing the opposite side of the first opposing surface 2b. The second extension portion 3 has a second opposing surface 3b facing the first extension portion 2, and a second gripping surface 3c facing the opposite side of the second opposing surface 3b. For example, by holding the first gripping surface 2c and the second gripping surface 3c in the hands and gripping the first extension portion 2 and the second extension portion 3, the distance between the first opposing surface 2b and the second opposing surface 3b can be narrowed.

[0021] The cable tearing part 10, the connector dismantling part 20 and the boot dismantling part 30 are provided on the first opposing surface 2b and the second opposing surface 3b. As a result, the cable C is torn, the connector is dismantled and the boot is dismantled by gripping the first gripping surface 2c and the second gripping surface 3c. The cable tearing part 10, the connector dismantling part 20 and the boot dismantling part 30 are arranged in this order. As an example, the boot dismantling part 30 is arranged adjacent to the hinge part 4, and the connector dismantling part 20 is arranged between the boot dismantling part 30 and the cable tearing part 10. The cable tearing part 10 is arranged on the opposite side of the connector dismantling part 20 from the hinge part 4.

[0022] FIG. 2 is a schematic diagram of a cable C for which the cable tearing tool 1 is used. For example, a connector K is attached to the end of the cable C. The connector K is, for example, an MPO connector. The connector K includes, for example, a housing K1 and a boot K2 connected to the housing K1. The boot K2 and the cable C are connected to the housing K1. The cable tearing tool 1 according to the present embodiment is capable of dismantling the connector K from the cable C. As a specific example, the connector K connected to the cable C is dismantled from the cable C, and the sheath C2 of the cable C is stripped along the direction D1, which is the extension direction of the cable C, while leaving a portion (ribbonized portion) in which the core wires C1 located inside the sheath C2 are bundled. As an example, the cable C is a cord with an outer diameter (diameter) of 3 mm.

[0023] FIG. 3 is a side view of the cable tearing tool 1 showing the cable tearing part 10 and the connector dismantling part 20 of the cable tearing tool 1. As shown in FIGS. 1 to 3, the cable tearing part 10 and the connector dismantling part 20 are aligned along a direction D2 which is the extension direction of the first extension part 2 and the second extension part 3. The cable tearing part 10 is a part which strips the sheath C2 of the cable C along a direction D1. The connector dismantling part 20 is a part which removes the housing K1 of the connector K from the cable C. The cable tearing part 10 has an inclined surface 11 formed in an insertion part into which the cable C is inserted, and a hole 12 which extends from the inclined surface 11 into the inside of the cable tearing tool 1. The cable C is inserted into the hole 12 along a direction D3 which is the extension direction of the hole 12.

[0024] FIG. 4 is a cross-sectional view of the cable tearing portion 10 cut along a plane perpendicular to the direction D2. As shown in FIG. 1 and FIG. 4, the inclined surface 11 is located at one end of the hole 12 in the direction D3. The inclined surface 11 gradually reduces in diameter toward the hole 12. As an example, the inclined surface 11 is formed by C-chamfering. For example, the inclined surface 11 is flat in cross section. The hole 12 has, for example, an elliptical cylindrical hole shape. That is, the shape of the inner surface 12b defining the hole 12 is an elliptical cylindrical shape.

[0025] The cable tearing unit 10 includes a blade 13 protruding into the hole 12 and a holding unit 14 that holds the blade 13. The blade 13 has, for example, a cutting unit 13b that cuts the sheath C2 of the cable C and a held unit 13c that is held by the holding unit 14. The cutting unit 13b protrudes from the inner surface 12b of the hole 12. The cutting unit 13b includes an inclined unit 13d that is inclined with respect to the direction D3, a tip 13f that is located on the opposite side of the inclined unit 13d to the held unit 13c, and an extension unit 13g that extends from the tip 13f to the outside of the hole 12. The blade 13 cuts the sheath C2 of the cable C along the direction D3 as the cable C inserted into the hole 12 enters the inclined unit 13d.

[0026] The holding portion 14 has, for example, a concave shape. The blade 13 can be fitted into the holding portion 14, and the holding portion 14 holds the fitted blade 13. The holding portion 14 has an inclined portion 14b extending from the inner surface 12b of the hole 12 along the inclined portion 13d, and a first extending portion 14c extending from an end of the inclined portion 14b opposite the inner surface 12b in a direction intersecting the direction D3. Furthermore, the holding portion 14 has a second extending portion 14d extending from an end of the first extending portion 14c opposite the inclined portion 14b along the direction D3, and a third extending portion 14f extending from the extending portion 13g to the second extending portion 14d. The blade 13 has, for example, a parallelogram shape. The holding portion 14 holds the blade 13 so that the cutting portion 13b protrudes from the hole 12. As an example, the cable tearing unit 10 includes a pair of blades 13. A hole 12 is formed between the pair of blades 13. This makes it possible to cut the sheath C2 of the cable C inserted into the hole 12 with the pair of blades 13, and to perform vertical stripping of the sheath C2 along the direction D3.

[0027] FIG. 5 is a perspective view showing the connector disassembly part 20. As shown in FIG. 3 and FIG. 5, the connector disassembly part 20 has a recess 21 recessed from each of the first opposing surface 2b and the second opposing surface 3b, and a protrusion 22 formed in the recess 21. The recess 21 is defined by a pair of side surfaces 21b aligned along the direction D2, and a bottom surface 21c extending in the direction D2 between the pair of side surfaces 21b. The protrusion 22 protrudes from the bottom surface 21c, for example. The protrusion 22 is a portion that enters the housing K1 of the connector K, and the housing K1 can be removed from the cable C by the protrusion 22 entering the housing K1. In other words, the protrusion 22 corresponds to a portion that enters the housing K1 of the connector K to remove the housing K1 from the cable C.

[0028] 6 is a perspective view showing the boot dismantling portion 30. The boot dismantling portion 30 includes a recess 31 recessed into the second opposing surface 3b of the second extension portion 3, and a protrusion 32 protruding from the second opposing surface 3b. The recess 31 is defined by a pair of side surfaces 31b aligned along the direction D2, and a bottom surface 31c located between the pair of side surfaces 31b. The bottom surface 31c includes a bottom portion 31d located at an end opposite to the protrusion 32, and an inclined portion 31f extending from the bottom portion 31d to the protrusion 32.

[0029] The protrusion 32 protrudes from the end of the inclined portion 31f on the opposite side to the bottom portion 31d. As an example, the protrusion 32 has a rectangular shape. The protrusion 32 corresponds to a portion that crushes the boot K2 sandwiched between the first gripping surface 2c and the second gripping surface 3c. That is, the protrusion 32 bites into the boot K2 sandwiched between the first extension portion 2 and the second extension portion 3, crushing the boot K2 and dismantling the boot K2.

[0030] Fig. 7 is a perspective view showing the cable tearing part 10 and the cable C inserted into the hole 12 of the cable tearing part 10. Fig. 8 is a cross-sectional view of the hole 12 and the cable C cut along a plane perpendicular to the extension direction (direction D1) of the cable C. As shown in Figs. 7 and 8, for example, the shape of the cross section of the cable C cut along a plane perpendicular to direction D1 (hereinafter sometimes simply referred to as "cross section of cable C") is almost a perfect circle.

[0031] The cross section of the hole 12 cut by a plane perpendicular to the direction D1 (hereinafter, sometimes simply referred to as "cross section of the hole 12") has a non-circular shape. For example, the cross section of the hole 12 has an elliptical shape. The length of the minor axis L1 of the cross section of the hole 12 is, for example, approximately the same as the diameter E of the cable C. The length of the major axis L2 of the cross section of the hole 12 is longer than the diameter E of the cable C. In the cross section of the hole 12, a pair of blades 13 protrude into the inside of the hole 12 along the minor axis L1 of the ellipse. The blades 13 protrude into the inside of the hole 12 from the ends of the minor axis L1 of the ellipse. In other words, the blades 13 protrude toward the inside of the hole 12 (hole center) from the hole inner surface part where the distance from the hole center in the cross-sectional shape of the hole 12 is the smallest.

[0032] Incidentally, the cable C may have an expanded portion C3, such as a portion wrapped with a seal with a barcode. If the cross-sectional shape of the hole is a perfect circle, the expanded portion C3 of the cable C may not be able to pass through the hole. In the cable tearing tool 1 according to this embodiment, the cross-sectional shape of the hole 12 is non-circular, so that the expanded portion C3 of the cable C can be passed through the hole 12.

[0033] FIG. 9 is a perspective view showing the cable tearing portion 10 and the state in which the expanded portion C3 of the cable C is inserted into the hole 12. FIG. 10 is a cross-sectional view of the hole 12 and the expanded portion C3 of the cable C cut along a plane perpendicular to the extension direction (direction D1) of the cable C. As shown in FIGS. 9 and 10, the diameter of the expanded portion C3 of the cable C is longer than the length of the minor axis L1 of the cross section of the hole 12. However, since the expanded portion C3 of the cable C is inserted into the hole 12 while being compressed by the inclined surface 11, it is compressed in the minor axis direction of the cross section of the hole 12 (up and down direction in FIG. 10). In this state, the expanded portion C3 of the cable C is deformed from the center of the hole to the outside in the major axis direction of the cross section of the hole 12. The hole 12 has a space portion 12c into which the deformed portion of the cable C enters in each of the major axis directions of the cross section of the hole 12 (left and right direction in FIG. 10). The portion that is compressed in the minor axis direction of the cross section of the hole 12 and deformed in the major axis direction of the cross section is inserted into the space 12c, whereby the expanded portion C3 can be smoothly inserted into the hole 12. Therefore, the expanded portion C3 of the cable C can be smoothly cut together with the sheath C2 by the blade 13 protruding into the inside of the hole 12, so that the cable C can be efficiently stripped longitudinally.

[0034] Next, the effects and advantages obtained from the cable tearing tool 1 according to this embodiment will be described in detail. In the cable tearing tool 1, a blade 13 for tearing the sheath C2 of the cable C protrudes from the inner surface 12b of the hole 12 into which the cable C is inserted. When the cable C inserted into the hole 12 is pulled out of the hole 12 along the extension direction (direction D1) of the cable C, the blade 13 protruding from the inner surface 12b of the hole 12 cuts the sheath C2 of the cable C along the extension direction. Therefore, the sheath C2 of the cable C can be cut along the extension direction of the cable C.

[0035] When the hole 12 is cut on a plane perpendicular to the extending direction of the cable C, the cross-sectional shape of the hole 12 is non-circular. The non-circular hole 12 has a space 12c into which the deformed portion of the cable C inserted into the hole 12 enters. Therefore, when the expanded portion C3 of the cable C is passed through the hole 12 and compressed by the inner surface 12b of the hole 12, the deformed portion of the cable C can enter the space 12c. Therefore, even if the expanded portion C3 of the cable C is passed through the hole 12 and compressed, the portion C3 deformed due to the compression can be released into the space 12c, so that the expanded portion C3 of the cable C can be prevented from getting caught and the portion C3 can be smoothly passed through the hole 12. As a result, the expanded portion C3 of the cable C can be efficiently torn together with the sheath C2.

[0036] An inclined surface 11 may be formed at an end of the hole 12 in the extending direction so as to gradually reduce in diameter toward the hole 12. In this case, the inclined surface 11 is formed at one end of the hole 12. Therefore, the enlarged portion C3 of the cable C can be smoothly inserted into the hole 12 via the inclined surface 11, so that the enlarged portion C3 of the cable C can be efficiently torn off by the blade 13.

[0037] The cross-sectional shape of the hole 12 taken along a plane perpendicular to the extending direction of the cable C may be elliptical. In this case, the cross-sectional shape of the hole 12 through which the enlarged portion C3 of the cable C is passed can be made simpler.

[0038] The blade 13 may protrude into the hole from a portion of the inner surface of the hole 12 that is the shortest distance from the center of the hole in the cross-sectional shape of the hole 12. In this case, the blade 13 protrudes from the portion of the inner surface of the hole that presses against the expanded portion C3 of the cable C, so that the blade 13 can easily bite into the pressed portion of the cable C. Therefore, the sheath C2 can be torn by the blade 13 more efficiently.

[0039] A connector K may be attached to one end of the cable C via a boot K2, and the cable tearing tool 1 may further include a connector dismantling unit 20 that removes the connector K from the cable C, and a boot dismantling unit 30 that dismantles the boot K2. In this case, the sheath C2 can be torn, the connector K can be dismantled, and the boot K2 can be dismantled by the single cable tearing tool 1. Therefore, since the sheath C2 can be torn and the connector K and the boot K2 can be removed by the single tool, the dismantling work of the cable C can be performed efficiently.

[0040] The above describes the embodiment of the cable tearing tool according to the present disclosure. However, the present invention is not limited to the above embodiment. That is, it is easily understood by those skilled in the art that various modifications and changes are possible within the scope of the gist of the present invention described in the claims. For example, the shape, size, number, material and arrangement of each part of the cable tearing tool can be appropriately changed within the scope of the gist of the above.

[0041] For example, in the above embodiment, the cable tearing tool 1 made of metal has been described. However, the cable tearing tool may be made of resin, and the material of the cable tearing tool is not particularly limited. In the above embodiment, an example in which the inclined surface 11 is formed at the end of the hole 12 has been described. However, the inclined surface does not have to be formed. In this case, the enlarged portion C3 of the cable C can be inserted into the hole 12 by pressing the enlarged portion C3 of the cable C with a finger or the like and inserting it into the hole 12.

[0042] In the above embodiment, the blade 13 and the holding part 14 are shaped like a parallelogram. However, the shapes of the blade and the holding part can be changed as appropriate. In the above embodiment, the cable tearing tool 1 including the cable tearing part 10, the connector dismantling part 20, and the boot dismantling part 30 has been described. However, the cable tearing tool may not include either the connector dismantling part 20 or the boot dismantling part 30. In the above embodiment, the example in which the cross-sectional shape of the hole 12 is elliptical has been described. However, the cross-sectional shape of the hole into which the cable C is inserted may be a shape other than an ellipse, such as an oval shape or a rectangular shape. [Explanation of symbols]

[0043] 1…Cable tearing tool 2...First extension part 2b...first opposing surface 2c...first gripping surface 3…Second extension part 3b…Second opposing surface 3c…Second gripping surface 4…Hinge section 10…Cable tearing section 11…Slope surface 12...hole 12b…Inner surface 12c…Space part 13…Blade 13b…cutting part 13c…Holded part 13d…Slope part 13f...Tip 13g...extension part 14...Holding part 14b…Slope part 14c...first extension part 14d…Second extension part 14f...Third extension part 20…Connector disassembly section 21…Recess 21b...side 21c…Bottom surface 22…Convex part 30…Boot Disassembly Section 31…Recess 31b...side 31c…Bottom surface 31d...Bottom 31f…Slope part 32…Convex part C…Cable C1…core wire C2…Sheath C3: Enlarged diameter section D1,D2,D3…direction E: Diameter K…Connector K1…Housing K2…boots L1…Short axis L2…Long axis

Claims

1. A cable tearing tool for tearing a sheath of a cable, comprising: a blade protruding from an inner surface of a hole into which the cable is inserted; the sheath of the cable inserted into the hole is cut by the blade when the cable is pulled out of the hole along the extending direction of the cable; The cross-sectional shape of the hole in a plane perpendicular to the extension direction is non-circular, the hole has a space into which a deformed portion of the cable inserted into the hole fits, The cross-sectional shape of the hole in a plane perpendicular to the extension direction is elliptical. Cable tearing tool.

2. An inclined surface is formed at an end of the hole in the extending direction, the diameter of which gradually decreases toward the hole. A cable tearing tool according to claim 1.

3. The blade protrudes into the hole from a portion of the inner surface of the hole that is at a minimum distance from the center of the hole in a cross-sectional shape of the hole. A cable tearing tool according to claim 1 or 2.

4. A connector is attached to one end of the cable via a boot, The connector disassembly unit further includes a connector disassembly unit that removes the connector from the cable, and a boot disassembly unit that disassembles the boot. A cable tearing tool according to any one of claims 1 to 3.

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