Cable coat peeling tool

Abstract

This cable coat peeling tool is for peeling off the coating of a cable, which is provided with the coating around a conductive wire, by a blade body while spirally cutting the coating, the cable coat peeling tool comprising: a hollow body part having an insertion port for inserting the cable into a front end in an axial direction and a discharge port for discharging the coating peeled off from the cable on the side surface; the blade body provided on the side surface of the body part; and a brush provided in the body part and polishing the outer periphery of a part of the conductive wire where the coating of the cable is peeled off. The discharge port has: an axial outer wall part which extends toward the radial outer side of the body part and extends from the front end side of the body part toward the rear end side thereof in the axial direction; a front side outer wall part which is connected to the front end of the axial outer wall part and extends toward the radial outer side of the body part; and a rear end side outer wall part which is connected to the rear end of the axial outer wall part and extends toward the radial outer side of the body part.

Description

Cable sheath stripping tool

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

[0002] Conventionally, trunk cables between electric power companies and distribution boards have used cables with a covering layer formed around the conductor, such as CV cables, CVD cables, CVT cables, and CVQ cables. CV cable is an abbreviation for cross-linked polyethylene insulated vinyl sheath cable. CV cables are cables that include a conductor and a covering that includes an insulator such as cross-linked polyethylene and a protective layer such as a vinyl sheath, which are provided around the conductor.

[0003] When installing these cables, the insulation is stripped away to expose the conductors, which are then connected to the required locations. The insulation layer, made of cross-linked polyethylene in particular, is hard and thick, making it difficult to strip. Therefore, stripping the insulation using a cutter or electrician's knife is not only inefficient, but also poses a risk of injury to the worker.

[0004] Furthermore, when using aluminum-based conductors, an insulating oxide film forms on the aluminum surface. Therefore, after stripping the cable's insulation, the conductive surface must be polished with an iron wire brush or similar tool to break down the oxide film and expose the new surface inside. This is a time-consuming process, and the results vary depending on the operator. For this reason, various cable insulation stripping tools have been proposed.

[0005] For example, Patent Document 1 describes a cable sheath stripping tool that includes a hollow main body having an insertion opening at one axial end for inserting a cable and an outlet on a side for discharging the sheath stripped from the cable, a blade provided on the side of the main body, and a brush provided on the main body for polishing the outer periphery of the conductor whose sheath has been stripped. The brush is arranged only on the opposite side of the blade with respect to an imaginary plane that passes through the tip of the blade and is perpendicular to the extension direction of the blade, as viewed from the axial direction of the main body. The above-mentioned cable sheath stripping tool can strip the sheath of the cable and easily and reliably polish the outer periphery of the conductor.

[0006] The sheath scraps stripped from the cable by the cable sheath stripping tool are curled (hereinafter referred to as "curls"). Therefore, the curled scraps discharged through the outlet hole of the main body may return to the outlet hole and enter the internal space of the main body. If the scraps that have entered the internal space become trapped between the tip of the cable conductor and the tip surface of the exposed length limiting means of the cable sheath stripping tool during the stripping operation, the stripped length may end up being shorter than the set stripping allowance. This could result in insufficient contact between the terminal and the conductor, resulting in insufficient electrical continuity and increased electrical resistance. If this problem becomes more pronounced, it could lead to heat generation. To avoid this, the shortened conductor may be re-trimmed to the specified size using a knife or other tool.

[0007] Furthermore, as the stripping operation progresses, the length of the curled chips gradually increases, making them more likely to become entangled around the outer periphery of the main body, which can cause problems during the stripping operation. To avoid this problem, the chips must be removed by manually winding them up or by rotating the main body in the opposite direction to the direction in which the chips are entangled, which is a cumbersome process, and this can lead to various issues that reduce the efficiency of the stripping operation of the cable conductor.

[0008] Japanese Patent Application Laid-Open No. 2019-193477

[0009] An object of the present disclosure is to provide a cable sheath stripping tool that can suppress a decrease in work efficiency associated with the cutting chips of the sheath stripped from the cable and the disposal of the cutting chips.

[0010] [1] A cable sheath stripping tool for stripping a sheath from a cable having a conductor surrounded by a sheath by cutting the sheath in a spiral using a blade, the cable sheath stripping tool comprising: a hollow main body having an insertion opening at a front axial end for inserting the cable and an outlet on a side surface for discharging the sheath stripped from the cable, blades provided on the side surface of the main body, and a brush provided on the main body for polishing the outer periphery of the conductor from which the sheath has been stripped, the outlet extending radially outward from the main body and having an axial outer wall portion extending from the front end side to the rear end side of the main body, a front-end outer wall portion connected to the front end of the axial outer wall portion and extending radially outward from the main body, and a rear-end outer wall portion connected to the rear end of the axial outer wall portion and extending radially outward from the main body. [2] The cable sheath stripping tool according to [1] above, wherein the front-end outer wall portion is inclined toward the front end side of the axial main body. [3] The cable stripping tool according to [1] or [2] above, wherein the rear-end outer wall portion is inclined toward the rear end of the main body in the axial direction. [4] The cable stripping tool according to any one of [1] to [3] above, wherein the axial outer wall portion is inclined in a direction away from the front-end outer wall portion and the rear-end outer wall portion. [5] The cable stripping tool according to any one of [1] to [4] above, wherein a connecting portion between the rear end of the axial outer wall portion and the rear-end outer wall portion is formed with a rounded corner or a C-chamfered corner. [6] The cable stripping tool according to any one of [1] to [5] above, wherein the main body portion has a tapered portion between a first main body portion having the discharge port and a second main body portion provided on the rear end side of the first main body portion and having a smaller radial outer dimension than the first main body portion. [7] The cable sheath stripping tool according to any one of [1] to [6], wherein the discharge outlet has an outer wall bottom portion on the rear side of the blade body. [8] The cable sheath stripping tool according to [7], wherein the axial length of the opening area of ​​the discharge outlet is limited by the outer wall bottom portion.

[0011] According to the present disclosure, it is possible to provide a cable sheath stripping tool that can suppress a decrease in work efficiency associated with the cutting chips of the sheath stripped from the cable and the disposal of the cutting chips.

[0012] FIG. 1 is a side view showing an example of a cable sheath stripping tool according to an embodiment. FIG. 2 is an enlarged cross-sectional view of region X in FIG. 1. FIG. 3 is an enlarged cross-sectional view of region Y in FIG. 1. FIG. 4 is an enlarged cross-sectional view of region Z in FIG. 1. FIG. 5 is a cross-sectional view showing a cross section taken along line A-A in FIG. 1. FIG. 6 is a perspective view showing an example of a blade constituting the cable sheath stripping tool according to an embodiment. FIG. 7 is a perspective view showing an example of a brush constituting the cable sheath stripping tool according to an embodiment. FIG. 8 is a perspective view showing an example of a cable to be stripped by the cable sheath stripping tool according to an embodiment. FIG. 9 is a view showing a state in which a guide member is attached to the cable sheath stripping tool of FIG. 1. FIG. 10 is a side view showing another example of a cable sheath stripping tool according to an embodiment. FIG. 11 is a side view showing another example of a cable sheath stripping tool according to an embodiment.

[0013] Hereinafter, a detailed description will be given based on an embodiment.

[0014] A cable sheath stripping tool according to an embodiment strips the sheath of a cable, the sheath of which is provided around a conductor, by cutting it in a spiral using a blade. The cable sheath stripping tool includes a hollow main body having an insertion opening at its axial front end for inserting the cable and an outlet at its side for discharging the sheath stripped from the cable, a blade provided on the side of the main body, and a brush provided on the main body for polishing the outer periphery of the conductor from which the sheath has been stripped. The outlet has an axial outer wall portion extending radially outward from the main body and extending from the axial front end to the axial rear end of the main body, a front-end outer wall portion connected to the front end of the axial outer wall portion and extending radially outward from the main body, and a rear-end outer wall portion connected to the rear end of the axial outer wall portion and extending radially outward from the main body.

[0015] Fig. 1 is a side view showing an example of a cable sheath stripping tool according to an embodiment. Fig. 2 is an enlarged cross-sectional view of region X in Fig. 1. Fig. 3 is an enlarged cross-sectional view of region Y in Fig. 1. Fig. 4 is an enlarged cross-sectional view of region Z in Fig. 1. Fig. 5 is a cross-sectional view showing the A-A cross section in Fig. 1. For convenience, Fig. 2 is an enlarged cross-sectional view of the discharge port 12 side of region X, Fig. 3 is an enlarged cross-sectional view of the discharge port 12 side of region Y, and Fig. 4 is an enlarged cross-sectional view of the discharge port 12 side of region Z.

[0016] 1 to 5, a cable sheath stripping tool 1 according to an embodiment includes a hollow main body 10, a blade 20, and a brush 30. The cable sheath stripping tool 1 strips the sheath of a cable, which has a sheath provided around a conductor, by cutting it in a spiral shape with the blade.

[0017] The main body 10 is a cylindrical member centered on the axis C and configured to have a circular cross section. The main body 10 has an insertion opening 11 for inserting a cable at its axial front end along the axis C. The main body 10 also has an outlet 12 on its side (periphery) for discharging chips of the coating stripped from the cable. The chips of the coating stripped from the cable by the cable coating stripping tool 1 are curled. The outlet 12 of the main body 10 is in communication with the internal space S of the main body 10. The inner diameter of the insertion opening 11 is slightly larger than the outer diameter of the cable (outer diameter of the coating) to be stripped.

[0018] 1 , the main body 10 has a first main body 16 having the outlet 12, and a second main body 17 provided on the rear end side of the first main body 16. The outer radial dimension of the second main body 17 is smaller than the outer radial dimension of the first main body 16.

[0019] Additionally, a blade attachment portion 13 for attaching the blade 20 is provided on the side of the main body 10. The blade attachment portion 13 has a screw hole formed therein so that the blade 20 can be attached at a predetermined position and angle. By tilting the angle of the blade 20, it is possible to perform a process known as penciling, in which the cable sheath is gradually tapered toward the tip of the conductor. Although not shown, the position and angle of the blade 20 can also be adjusted by inserting other members such as a spacer between the blade attachment portion 13 and the blade 20.

[0020] Additionally, brush attachment portions 14 for attaching brushes 30 are provided on the side surfaces of the main body 10. Here, the brush attachment portions 14 are provided at two locations around the circumference of the main body 10, but the installation configuration of the brush attachment portions 14 is not particularly limited, and they may be provided at only one location, or at three or more locations.

[0021] 1 to 4, the outlet 12 of the main body 10 has an axial outer wall portion 12a, a front-end outer wall portion 12b, and a rear-end outer wall portion 12c. The axial outer wall portion 12a extends radially outward from the main body 10 and extends from the front end side to the rear end side of the main body 10 in the axial direction.

[0022] An outer wall bottom 12e is connected to the inner edge of the rear-end outer wall 12c. Thus, the discharge port 12 has the outer wall bottom 12e on the rear side of the blade body 20. The outer wall bottom 12e is connected to the inner edge of the rear-end outer wall 12c and covers part of the internal space S except for an opening region R, which will be described later. The outer wall bottom 12e is a flat surface that is parallel to the central axis C and radially outward from the central axis C of the first main body 16, and is located adjacent to the rear (rear end) of the blade body 20, covering the internal space S from the axial outer wall 12a side toward the right in the drawing.

[0023] The front-end outer wall portion 12b is connected to the front end of the axial outer wall portion 12a and extends radially outward from the main body portion 10. The front-end outer wall portion 12b does not extend along the axial direction of the main body portion 10, but is connected to the front end of the axial outer wall portion 12a at a predetermined angle. For example, the front-end outer wall portion 12b may be inclined outward in the extending direction of the outer wall bottom portion 12e at an angle equivalent to θ2 in accordance with the mounting angle of the blade body 20, or may be connected to the front end of the axial outer wall portion 12a at a substantially vertical angle.

[0024] The rear-end outer wall portion 12c is connected to the rear end of the axial outer wall portion 12a and extends radially outward from the main body portion 10. The rear-end outer wall portion 12c does not extend along the axial direction of the main body portion 10, but is connected to the rear end of the axial outer wall portion 12a at a predetermined angle. For example, the rear-end outer wall portion 12c may be inclined outward in the extending direction of the outer wall bottom portion 12e at an angle equivalent to θ2 in accordance with the mounting angle of the blade body 20, or may be connected to the rear end of the axial outer wall portion 12a at a substantially vertical angle. The front-end outer wall portion 12b and the rear-end outer wall portion 12c face each other with a predetermined gap between them.

[0025] Because the discharge port 12 has the axial outer wall portion 12a, the front-end outer wall portion 12b, and the rear-end outer wall portion 12c, curled sheath chips (hereinafter also referred to as curled sheath chips) discharged from the opening region R of the discharge port 12 in the main body portion 10 continue to be discharged as chips while hitting the rear end side of the axial outer wall portion 12a and the rear-end outer wall portion 12c. This prevents the curled sheath chips discharged from the discharge port 12 from returning to the opening region R of the discharge port 12 that connects the discharge port 12 and the internal space S of the main body portion 10, and suppresses the sheath chips from entering and accumulating in the internal space S of the main body portion 10, thereby suppressing a decrease in work efficiency caused by removing the sheath chips when performing stripping work with the cable sheath stripping tool 1.

[0026] Furthermore, since chips are less likely to accumulate in the internal space S of the main body 10, chips can be prevented from accumulating between the tip of the conductor 2 a of the cable 2 and the tip surface 41 of the exposed length restriction means 40 during the stripping operation. Therefore, the exposed length L (see FIG. 8 ) of the conductor 2 a in the cable 2 can be prevented from becoming shorter than a predetermined dimension, which would be caused by chips accumulating between the tip of the conductor 2 a and the tip surface 41 of the exposed length restriction means 40.

[0027] In order to enhance the above-mentioned effects, it is preferable that the axial outer wall portion 12a is inclined in a direction away from the front end side outer wall portion 12b and the rear end side outer wall portion 12c, as shown in FIGS.

[0028] Similarly, from the viewpoint of improving the above-mentioned effect, as shown in Fig. 4, it is preferable that the front end side outer wall portion 12b is inclined toward the front end side in the axial direction of the main body portion 10. Furthermore, from the same viewpoint, it is preferable that the connecting portion between the front end of the axial direction outer wall portion 12a and the front end side outer wall portion 12b is not angular, but has rounded corners as shown in Fig. 1.

[0029] Similarly, from the viewpoint of improving the above-mentioned effect, as shown in Fig. 4, it is preferable that the rear end side outer wall portion 12c is inclined toward the rear end side in the axial direction of the main body portion 10. Furthermore, from the same viewpoint, it is preferable that the connecting portion between the rear end of the axial outer wall portion 12a and the rear end side outer wall portion 12c is not angular, but is formed with rounded corners as shown in Fig. 1 or with C-chamfered edges.

[0030] Furthermore, in the main body portion 10, it is preferable that a tapered portion 18 having a smaller radial outer dimension from the first main body portion 16 toward the second main body portion 17 be provided between the first main body portion 16 having the discharge outlet 12 and the second main body portion 17 having a smaller radial outer dimension than the first main body portion 16 and provided on the rear end side of the first main body portion 16.

[0031] If curled coating scraps discharged from the discharge port 12 become entangled around the outer periphery of the main body portion 10, the coating scraps entangled around the main body portion 10 are removed by shifting them toward the insertion port 11. Even if the coating scraps become entangled around the rear end side of the main body portion 10 (the second main body portion 17 side), the tapered portion 18 of the main body portion 10 allows the coating scraps entangled at the rear end side to be smoothly shifted from the tapered portion 18 to the first main body portion 16, and therefore can be easily removed from the main body portion 10.

[0032] On the other hand, if the main body portion 10 does not have a tapered portion 18, it is not easy to shift the coating debris that has become tangled at the rear end to the first main body portion 16, and it may be time-consuming to remove the coating debris from the main body portion 10.

[0033] 5, the brush attachment portions 14 are arranged only on the opposite side of the blade bodies 20 (to the left of the two-dot chain line V in FIG. 5) from an imaginary plane V that passes through the tip E of the blade body 20 and is perpendicular to the extending direction of the blade body 20 (the horizontal direction in FIG. 5, which coincides with the extending direction of the upper surface of the blade body attachment portion 13 to which the blade body 20 is attached), as viewed in the axial direction of the main body 10. Each brush attachment portion 14 has two screw holes so that the brush 30 can be attached at a predetermined position and angle. The brush attachment portion 14 has a brush insertion hole 14a that communicates with the internal space S of the main body 10.

[0034] The main body 10 is also provided with a restricting wall 15 that restricts the cutting width of the cable sheath. The restricting wall 15 is formed by a convex portion that protrudes from the inner peripheral surface of the main body 10 in the internal space S. The shape of the restricting wall 15 is not particularly limited as long as it can abut against the tip surface of the cable sheath and restrict the insertion of the cable. The axial distance between the restricting wall 15 and the cutting edge 21a of the cutting blade portion 21, which will be described later, is the cutting width of the sheath.

[0035] Figure 6 shows the blade body 20 removed from the main body 10. The blade body 20 is provided on the side surface of the main body 10 and has a cutting edge 21 and a scooping edge 22. As shown in Figure 6, the cutting edge 21a of the cutting edge 21 and the cutting edge 22a of the scooping edge 22 are arranged perpendicular to each other so that the cross section of the blade body 20 is approximately L-shaped. The scooping edge 22 is provided with a through-hole 23 for inserting a screw 24 therethrough.

[0036] 1, the blade body 20 is detachably fixed by a screw 24 to a blade body attachment portion 13 provided adjacent to the discharge opening 12 of the main body 10. The blade body 20 is arranged so that the cutting edge 21a of the cutting blade portion 21 and the cutting edge 22a of the scooping blade portion 22 protrude into the internal space S, and the cutting edge 21 of the blade body 20 is located on the insertion opening 11 side (forward) of the main body 10.

[0037] FIG. 7 shows the brush 30 removed from the main body 10. The brush 30 is detachably attached to the main body 10 and polishes the outer periphery of the conductor wire where the insulation of the cable has been stripped. The brush 30 is a so-called channel brush, and includes multiple brush wires 31 made of metal or resin and an elongated base 32 on which the multiple brush wires 31 are bundled and planted. The base 32 extends linearly in the longitudinal direction. The brush 30 also includes a mounting bracket 33 for fixedly holding the base 32 and attaching it to the main body 10. Through holes 34 for inserting screws 35 are formed at both longitudinal ends of the mounting bracket 33.

[0038] The material of the brush wire 31 is not particularly limited, and may be, for example, iron or stainless steel such as SUS. Furthermore, from the viewpoint of preventing electrolytic corrosion (galvanic corrosion), the material of the brush wire 31 is preferably a metal such as magnesium or titanium, which has a lower ionization tendency than aluminum, or a non-metallic material such as resin.

[0039] As shown in Figure 5, when viewed from the axial direction of the main body 10, the brush 30 is positioned in a range on the opposite side of the blade body 20 with respect to an imaginary plane V that passes through the tip E of the blade body 20 and is perpendicular to the extension direction of the blade body 20.

[0040] The brush wires 31 extend in a direction toward the axis C (in the radial direction of the main body 10). The tips of the brush wires 31 protrude into the internal space S. The longitudinal direction of the base 32 is parallel to the axis C.

[0041] 1, the brush 30 is disposed in the axial direction of the main body 10 so that the end 31a of the brush wire 31 is at the same axial position as the tip E of the blade body 20, or closer to the rear end of the main body 10 than the tip E of the blade body 20. This is because the coating is removed to polish only the outer periphery of the exposed conductor.

[0042] The cable 2 to be stripped using the cable sheath stripping tool 1, as shown in FIG. 8, has a conductor 2a (made of multiple strands twisted together) made of an aluminum-based material or the like, surrounded by an insulator such as cross-linked polyethylene and a sheath 2b made of a vinyl sheath or the like. The materials for the conductor 2a and the sheath 2b are not particularly limited; for example, the conductor 2a may be made of a copper-based material. The sheath 2b may have one layer, as shown in FIG. 8, or two or more layers. For example, the outer diameter of the cable 2 including the sheath 2b is 13 mm to 34 mm, and the outer diameter of the conductor 2a is 7 mm to 24 mm. Examples of aluminum-based materials include pure aluminum and aluminum alloys containing small amounts of additional elements (e.g., copper, manganese, silicon, magnesium, zinc, nickel, iron, etc.).

[0043] The cable stripping tool 1 also includes an exposed length limiting means 40 for limiting the axial length of the stripped sheath 2b from the cable 2, that is, the exposed length L of the conductor 2a (see FIG. 8).

[0044] 1, the exposed length restricting means 40 is disposed in the internal space S of the main body 10. The exposed length restricting means 40 restricts further insertion of the cable 2 by causing the tip of the conductor 2a, from which the coating 2b has been stripped, to abut against a tip surface 41. This allows the exposed length L of the conductor 2a to be restricted to a preset length.

[0045] The exposed length regulating means 40 may be fixed within the main body portion 10, but from the viewpoint of appropriately adjusting the exposed length L of the conductor 2a, it is preferable that the exposed length regulating means 40 be arranged so that its position can be adjusted in the axial direction.

[0046] The cable stripping tool 1 is configured to be connectable to a rotary tool (not shown) such as an electric drill driver. Specifically, as shown in Fig. 1, the cable stripping tool 1 has a bit-shaped portion 50 that is provided on the axial rear end side of the main body 10 and extends in the axial direction. The bit-shaped portion 50 may be provided integrally with the exposed length limiting means 40, or may be separate from the exposed length limiting means 40 and detachably attached to the main body 10.

[0047] When using the cable sheath stripping tool 1 to strip the sheath 2b from the cable 2 and polish the conductor wire 2a, the cable sheath stripping tool 1 is used, for example, in a state in which it is attached to a rotary tool (not shown). An operator inserts the tip of the cable 2 held in one hand into the insertion port 11 of the cable sheath stripping tool 1, inserts the cable 2 until the tip surface of the sheath 2b of the cable 2 abuts against the restricting wall 15, and then starts the rotary tool to rotate the cable sheath stripping tool 1 clockwise relative to the cable 2. As the main body 10 rotates around the cable 2, the sheath 2b of the cable 2 is helically cut by the cutting blade portion 21 of the blade body 20, and the cut sheath 2b is stripped from the conductor wire 2a by the scooping blade portion 22. As the sheath 2b is cut and stripped, the brush 30 rotates around the conductor wire 2a where the sheath 2b has been stripped and exposed, and the outer periphery of the conductor wire 2a is polished by the brush wire 31. The scraps of the coating 2 b that have been cut and peeled off in a spiral shape (curled coating scraps) are discharged from the opening region R of the discharge port 12 .

[0048] Furthermore, in the cable sheath stripping tool 1, the brush 30 is positioned within a predetermined range (a range on the opposite side of the blade body 20 with respect to an imaginary plane V that passes through the tip E of the blade body 20 and is perpendicular to the extension direction of the blade body 20, as viewed from the axial direction of the main body 10). In this way, the outer periphery of the conductor 2a is not entirely surrounded by the brush wire 31, which prevents excessive resistance when inserting and removing the conductor 2a and when rotating the main body 10. Furthermore, by arranging the brush 30 within the above range, it is possible to prevent a decrease in stripping performance when the blade body 20 strips the sheath 2b from the cable 2. That is, for example, if the brush 30 were positioned not in the above-described range but in a range on the blade body 20 side with respect to the imaginary plane V (to the right of the two-dot chain line V in FIG. 5 ), the brush 30 would push the cable 2 in a direction away from the blade body 20 (to the left in FIG. 5 ), and the cutting edges of the blade body 20 (the cutting edge 21 a of the cutting edge portion 21 and the cutting edge 22 a of the scooping edge portion 22) would not contact the cable 2 as intended, which could result in a decrease in stripping performance. On the other hand, in the cable sheath stripping tool 1, the brush 30 is positioned in a range on the opposite side of the blade body 20 with respect to the imaginary plane V, so such a decrease in stripping performance can be avoided. Furthermore, by positioning the brush 30 in the above-described range, the position of the screw 24 that secures the blade body 20 is not restricted.

[0049] Furthermore, in the process of polishing the conductor 2a, the conductor 2a that comes into contact with the brush wire 31 and receives a pressing force can escape (displace) appropriately to an area where the brush 30 is not provided. Therefore, the brush wire 31 does not dig too deeply into the conductor 2a, causing variations in polishing.

[0050] Therefore, the cable sheath stripping tool 1 can easily and reliably polish the outer periphery of the conductor wire 2 a. When the cable sheath stripping tool 1 is used to strip a cable 2 having an aluminum-based conductor wire 2 a, the sheath 2 b can be stripped and the insulating oxide film formed on the surface of the conductor wire 2 a can be easily and reliably removed. Furthermore, since the aluminum-based conductor wire 2 a is lighter and less expensive than, for example, a copper-based conductor wire, the use of the aluminum-based conductor wire 2 a can reduce the cable installation work time and the cable material cost.

[0051] Furthermore, in the cable stripping tool 1, it is preferable that the brushes 30 are provided at multiple locations in the circumferential direction of the main body 10. With this configuration, the outer periphery of the conductor 2a can be polished more efficiently and appropriately. From the same perspective, it is preferable that the number of brushes 30 provided is two, as shown in FIG. 5. Furthermore, when two brushes 30 are provided, it is preferable that the circumferential distance R1 between the two brushes 30 around the axis C is within the range of 30° to 150°, as shown in FIG. 5. With this configuration, the conductor 2a can be polished more effectively.

[0052] Furthermore, the brush 30 is preferably positioned in the axial direction of the main body 10 so that the axial distance from the tip E of the blade body 20 shown in FIG. 1 to the end 31a of the brush wire 31 on the front side is within 5 mm. By positioning the brush wire 31 in the axial direction close to the tip E of the blade body 20 in this manner, it becomes possible to polish the outer periphery of the exposed conductor 2a immediately after stripping the coating 2b. Furthermore, by reducing the axial distance between the blade body 20 and the brush wire 31, the axial length of the main body 10 can be reduced, thereby enabling the main body 10 to be made more compact. From the same perspective, it is most desirable that the end 31a of the brush wire 31 be positioned in the same axial position as the tip E.

[0053] Furthermore, the installation range of the brush wires 31 in the axial direction of the main body 10 is preferably 30% or more of the range from the position of the tip E of the blade body 20 to the tip surface 41 of the exposed length restriction means 40. The size of the base 32 on which the brush wires 31 are provided is not particularly limited, and for example, the length W of the base 32 in the longitudinal direction is 25 mm, and the length D of the base 32 in the lateral direction is 5 mm.

[0054] Furthermore, when the inclination angle θ2 (see Figure 1) of the cutting edge portion 21 with respect to a plane perpendicular to the axis C is 5.5° or more and 8.0° or less, the gap between the cutting edge 21a of the cutting edge portion 21 and the surface of the cable 2 becomes small, and the curled coating debris can be prevented from returning to the opening region R of the discharge outlet 12.

[0055] 9, a guide member 60 may be attached to the discharge port 12 to guide the curled coating scraps discharged from the discharge port 12 toward the rear end of the main body 10. In this case, the guide member 60 is positioned above the blade body 20, and the guide member 60 and the blade body 20 can be fixed to the main body 10 using screws 24. The guide member 60 is a substantially triangular plate-shaped member, and its side surface 61 serves as a guide surface that serves as an entanglement prevention means for guiding the curled coating scraps discharged from the opening region R of the discharge port 12 toward the rear end of the main body 10. In other words, the curled coating scraps are discharged through the gap between the side surface 61 of the guide member 60 and the rear-end outer wall portion 12c of the discharge port 12. The shape of the guide member 60 and the method of attaching the guide member 60 to the main body 10 are not limited to the illustrated example and can be modified as appropriate.

[0056] 10 , according to the present invention, the outer-wall bottom 12e may be connected to the inner edge of the axial outer wall 12a in addition to the inner edge of the rear-end outer wall 12c. In this case, the rear end of the opening region R adjacent to the axial outer wall 12a of the discharge port 12 is covered by the outer-wall bottom 12e, and the axial length of the portion communicating with the internal space S is limited, resulting in an opening region R10. The axial length of the opening region R10 is limited by the outer-wall bottom 12e. In this way, the opening region R is defined as a case where the rear end of the portion adjacent to the axial outer wall 12a of the discharge port 12 is not covered by the outer-wall bottom 12e and the axial length of the portion communicating with the internal space S is long, while the opening region R10 is defined as a case where the rear end of the portion adjacent to the axial outer wall 12a of the discharge port 12 is covered by the outer-wall bottom 12e and the axial length of the portion communicating with the internal space S is limited.

[0057] Here, the length of the portion of the outer wall bottom 12e adjacent to and rearward of the opening region R10 in the direction of the central axis C is preferably at least half the width 20W of the blade body 20, and may be longer than the width 20W of the blade body 20 or longer than the length of the opening region R10 in the direction of the central axis c. It is also more preferable that the opening region R10 be limited forward of the rear edge of the blade body 20 and its extension line L2, or these features may be combined. Furthermore, as shown in Fig. 11, the outer wall bottom 12e may be extended in the axial direction, for example, toward the outer wall 12a in the axial direction, to further narrow the opening region R10 in the portion facing the blade surface.

[0058] In this way, the chips continuously discharged from the opening region R10 are sequentially curled along the surfaces of the front end outer wall portion 12b, the rear end outer wall portion 12c, and the outer wall bottom portion 12e before being discharged from the discharge port 12, thereby preventing the tips of the curled chips once discharged from the opening region R10 from re-entering the interior of the main body 10 and accumulating therein. Therefore, according to the present invention, it is possible to more reliably finish stripping the cable to the set stripping amount.

[0059] According to the embodiment described above, the discharge outlet provided in the main body has an axial outer wall portion, a front end outer wall portion, and a rear end outer wall portion, so that the cable sheath stripping tool can suppress a decrease in work efficiency associated with the cuttings of the sheath stripped from the cable and the disposal of those cuttings.

[0060] Although the embodiments have been described above, the present invention is not limited to the above embodiments, but includes all aspects encompassed by the concept and scope of the claims of the present disclosure, and can be modified in various ways within the scope of the present disclosure.

[0061] DESCRIPTION OF SYMBOLS 1 Cable sheath stripping tool 2 Cable 2a Conductor 2b Sheath 10 Main body 11 Insertion opening 12 Discharge opening 12a Axial outer wall 12b Front end outer wall 12c Rear end outer wall 12e Outer wall bottom 13 Blade body attachment portion 14 Brush attachment portion 14a Brush insertion hole 15 Restricting wall 16 First main body 17 Second main body 18 Tapered portion 20 Blade 20W Width of blade 21 Cutting edge 21a Cutting edge of cutting edge 22 Scooping edge 22a Scooping edge 23 Through hole 24 Screw 30 Brush 31 Brush wire 31a End of brush wire 32 Base 33 Mounting fixture 34 Through hole 35 Screw 40 Exposed length restricting means 41 Tip surface 50 Bit-shaped portion 60 Guide member 61 Side surface C Axis line E Tip of blade body L Exposed length L2 Rear edge of blade body and its extension line V Imaginary plane R, R10 Opening area S Internal space X, Y Area

Claims

1. A cable sheath stripping tool for stripping a sheath provided around a conductor of a cable by cutting the sheath in a spiral shape with a blade, comprising: a hollow main body having an insertion opening at a front end in the axial direction for inserting the cable and an outlet opening on a side for discharging the sheath stripped from the cable; a blade provided on the side of the main body; and a brush provided on the main body for polishing the outer periphery of the conductor of the cable from which the sheath has been stripped, the outlet having: an axial outer wall portion extending radially outward of the main body portion and extending from the front end side to the rear end side of the axial outer wall portion of the main body portion; a front end side outer wall portion connected to the front end of the axial outer wall portion and extending radially outward of the main body portion; and a rear end side outer wall portion connected to the rear end of the axial outer wall portion and extending radially outward of the main body portion.

2. The cable sheath stripping tool according to claim 1, wherein the front end outer wall portion is inclined toward the front end in the axial direction of the main body portion.

3. A cable sheath stripping tool as set forth in claim 1, wherein the rear end side outer wall portion is inclined toward the rear end side in the axial direction of the main body portion.

4. The cable sheath stripping tool according to claim 1, wherein the axial outer wall portion is inclined in a direction away from the front end outer wall portion and the rear end outer wall portion.

5. A cable sheath stripping tool as set forth in claim 1, wherein a connecting portion between the rear end of said axially outer wall portion and said rear end side outer wall portion is formed with rounded corners or C-chamfered edges.

6. A cable sheath stripping tool as described in any one of claims 1 to 5, wherein in the main body portion, a tapered portion having a radial outer dimension decreasing from the first body portion toward the second body portion is provided between a first body portion having the discharge outlet and a second body portion having a smaller radial outer dimension than the first body portion and provided on the rear end side of the first body portion.

7. The cable sheath stripping tool according to claim 1, wherein the discharge port has an outer wall bottom portion on the rear side of the blade body.

8. The cable stripping tool according to claim 7, wherein the axial length of the open area of ​​the discharge port is limited by the bottom of the outer wall.

Images