JP2019193477A - Cable coating removing tool - Google Patents

Abstract

To provide a cable coating removing tool which is capable of removing a coating of a cable, and can easily and reliably polish an outer periphery of a conducting wire.SOLUTION: A cable coating removing tool 1 removes a coating 2b of a cable 2, which has the coating 2b around a conducting wire 2a, by spirally cutting it with a blade body 20. The cable coating removing tool 1 comprises: a hollow body part 10 which is provided, at one end in its axial direction, with an insertion port 11 for inserting the cable 2 and an ejection port 12, on its lateral face, for ejecting the coating 2b removed from the cable 2; the blade body 20 provided on the lateral face of the body part 10; and a brush 30, provided on the body part 10, for polishing an outer periphery of the conducting wire 2a from which the coating 2b has been removed. When viewed in the axial direction of the body part 10, the brush 30 is arranged only in a range on the opposite side to the blade body 20 with respect to a virtual plane V passing through a tip end E of the blade body 20 and vertical to an extension direction of the blade body 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cable coating stripping tool for stripping a coating provided around a conductor of a cable.

  Conventionally, as a main line cable from an electric power company to a distribution board, for example, a cable in which a coating layer is formed around a conducting wire such as a CV cable, a CVD cable, a CVT cable, and a CVQ cable is used. The CV cable is an abbreviation for a crosslinked polyethylene insulated vinyl sheath cable. As shown in FIG. 5, the CV cable 2 is composed of a conductor 2a, an insulator such as a crosslinked polyethylene provided around the conductor 2a, and a layer such as a vinyl sheath. And a covering 2b including the cable.

  During construction, these cables are peeled off from the sheath such as vinyl sheath and cross-linked polyethylene, and the conductors are exposed to be connected to necessary places. Among the coatings, the cross-linked polyethylene layer, in particular, is hard and thick, and is difficult to remove. Therefore, there is a problem that not only the work with a cutter, an electric knife, etc. is inefficient, but also injury to workers is likely to occur.

  In addition, when an aluminum conductor is used, an insulating oxide film is formed on the aluminum surface. Therefore, after the cable coating is peeled off, the oxide film must be removed, which is troublesome. End up. For this reason, various cable coating stripping tools have been proposed.

  For example, in Patent Document 1, a main body (cylindrical main body) provided with an introduction port for introducing a cable (covered wire) and a discharge port for deriving a cable cover, a blade body for stripping the coating, and a conductor ( A coating comprising: a contact portion that stops the core wire) at a predetermined position; and a polishing member that polishes the outer periphery of the conducting wire, and configured to peel off the cable coating by rotating the blade around the cable. A stripping device has been proposed.

  According to the covering stripping device, the end portion of the cable is inserted into the introduction port, and the body portion is rotated in one direction while pressing the main body portion against the electric wire, whereby the covering of the cable is spirally cut and stripped by the blade body. Can be taken. Further, in the coating stripping device of Patent Document 1, a polishing member for polishing the outer periphery of the conducting wire is provided inside the main body, and the coating remaining on the conducting wire after stripping the coating with the blade, It is said that the coating provided on the conducting wire can be removed.

Japanese Patent Laid-Open No. 11-332048

  However, in the coating stripping device of Patent Document 1, since the brush wire material of the polishing member is arranged radially over the entire circumference of the inner peripheral surface of the main body portion, when inserting and removing the conductive wire, and of the main body portion Resistance during rotation increases. In addition, since the outer periphery of the conducting wire is surrounded by the brush wire in the circumferential direction, there is no escape space for the conducting wire that is in contact with the brush wire and subjected to the pressing force, and there is a risk that the brush wire will bite into the conducting wire and cause variation in polishing. is there.

  SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a cable coating peeling tool that can easily and reliably polish an outer periphery of a conductor while peeling a cable coating.

The present invention has been made to solve the above-mentioned problems, and the cable coating peeling tool of the present invention peels off the coating of a cable provided with a coating around a conductor wire while cutting the coating spirally with a blade. A cable sheath stripping tool to take
A hollow main body having an insertion port for inserting the cable at one end in the axial direction, and a discharge port for discharging the coating peeled off from the cable on the side surface;
The blade provided on a side surface of the main body, and
A brush that is provided on the main body and polishes the outer periphery of the conductive wire from which the coating has been stripped,
The brush is disposed only in a range opposite to the blade body with respect to a virtual plane passing through the tip of the blade body and perpendicular to the extending direction of the blade body as viewed from the axial direction of the main body. It is characterized by being.

In the cable sheath peeling tool of the present invention, the brush has a long base portion in which a plurality of brush wires are implanted,
It is preferable that the base portion is arranged so that the longitudinal direction thereof is parallel to the axis of the main body portion.

  Moreover, in the cable coating peeling tool of this invention, it is preferable to provide the entanglement prevention means which prevents the coating peeled from the cable from winding around the cable before peeling and tangling.

Moreover, in the cable sheath peeling tool of the present invention, the arrangement position of the brush in the axial direction of the main body is
It is preferable that the distance in the axial direction from the tip of the blade body to the brush is within 5 mm.

  Moreover, in the cable coating | peeling peeling tool of this invention, it is preferable that the said brush is provided in two places in the circumferential direction of the said main-body part.

  According to the present invention, it is possible to provide a cable coating peeling tool that can easily and reliably polish the outer periphery of a conductive wire while peeling a cable coating.

It is a side view of the cable coating peeling tool which concerns on one Embodiment of this invention. It is sectional drawing which shows the AA cross section of the cable sheathing peeling tool of FIG. It is a perspective view of the cutter in the cable coating | coated peeling tool of FIG. FIG. 2 is a perspective view of a brush in the cable coating peeling tool of FIG. 1. It is a perspective view which shows an example of a cable. It is a side view which shows the modification of a brush. It is a figure which shows the state which attached the guide member to the cable coating | coated peeling tool of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a cable coating peeling tool 1 according to an embodiment of the present invention, and FIG. 2 shows an AA cross section of the cable coating peeling tool 1 shown in FIG. The cable coating / peeling tool 1 according to the present embodiment includes a hollow main body 10, a cutter 20 as a blade attached to the main body 10, and a brush 30 attached to the main body 10.

  The main body 10 is a cylindrical member centered on the axis C and is configured so that the cross section is circular. The main body 10 has an insertion port 11 for inserting the cable 2 at one end (front end) in the axial direction along the axis C. Further, a discharge port 12 for discharging the coating 2b peeled off from the cable 2 is formed on the side surface (circumferential surface) of the main body portion 10. The discharge port 12 communicates with the internal space S of the main body 10. The inner diameter of the insertion port 11 is slightly larger than the outer diameter of the corresponding cable 2 (the outer diameter of the covering 2b).

  Further, a blade body attaching portion 13 for attaching the cutter 20 is provided on the side surface of the main body portion 10. The blade body attaching portion 13 is formed with a screw hole so that the cutter 20 can be attached at a predetermined position and angle. In addition, although illustration is abbreviate | omitted, it is also possible to adjust the position, angle, etc. of the cutter 20 by pinching other members, such as a spacer, between the blade body attaching part 13 and the cutter 20. For example, when the angle of the cutter 20 is inclined, it is possible to perform a so-called penciling process in which the coating 2b is cut so as to gradually taper toward the tip end side of the conducting wire 2a.

  A brush attachment portion 14 for attaching the brush 30 is provided on the side surface of the main body portion 10. In this example, the brush attachment portions 14 are provided at two locations in the circumferential direction of the main body portion 10, but only one location or three or more locations may be used. Here, as shown in FIG. 2, the brush mounting portion 14 passes through the tip E of the cutter 20 as viewed from the axial direction of the main body portion 10, and the extending direction of the cutter 20 (the horizontal direction in FIG. 2 (the left side of the two-dot chain line (V) in FIG. 2) with respect to the virtual plane V perpendicular to the imaginary plane V perpendicular to the extending direction of the upper surface of the blade body mounting portion 13 to which 20 is attached. Is only arranged. Each of the brush attachment portions 14 is formed with two screw holes so that the brush 30 can be attached at a predetermined position and angle. The brush attachment portion 14 is formed with a brush insertion hole 14 a that communicates with the internal space S of the main body portion 10.

  Further, the main body 10 is provided with a regulation wall 15 that regulates the cutting width of the sheath 2 b of the cable 2. In the internal space S, the restriction wall 15 of this example is configured by a convex portion that protrudes from the inner peripheral surface of the main body portion 10. The shape of the restriction wall 15 is not particularly limited as long as the insertion of the cable 2 can be restricted by abutting the front end surface of the covering 2b of the cable 2. In addition, the distance of the axial direction of the control wall 15 and the blade edge | tip 21a of the cutting-blade part 21 mentioned later becomes the cutting width of the coating | coated 2b.

  FIG. 3 shows the cutter 20 removed from the main body 10. The cutter 20 is formed such that the cutting blade portion 21 and the scissors blade portion 22 are arranged perpendicular to each other and the cross section is substantially L-shaped. In this example, a through hole 23 for passing the screw 24 is formed on the side of the scissors blade 22. As shown in FIG. 1, the cutter 20 can be detachably fixed to the blade body attaching portion 13 provided adjacent to the discharge port 12 of the main body portion 10 by screws 24. The cutter 20 is disposed such that the cutting edge 21a of the cutting edge 21 and the cutting edge 22a of the scissors cutting edge 22 protrude into the internal space S, and the cutting edge 21 is located on the insertion port 11 side (front).

  FIG. 4 shows the brush 30 in a state removed from the main body 10. The brush 30 is detachably attached to the main body 10 and is configured to polish the outer periphery of the conducting wire 2a from which the coating 2b has been peeled off. The brush 30 of this example is a so-called channel brush, and is a long base in which a metal or resin brush wire 31 and a large number (plural) of brush wires 31 are bundled and planted. Unit 32. The base portion 32 extends linearly in the longitudinal direction. Further, the brush 30 of this example includes a mounting bracket 33 for fixing and holding the base portion 32 to the main body portion 10. Through holes 34 for passing the screws 35 are formed at both ends in the longitudinal direction of the mounting bracket 33.

  The material of the brush wire 31 can be stainless steel such as SUS, but is not limited thereto. The material of the brush wire 31 is preferably made of a metal such as magnesium or titanium, which has a lower ionization tendency than aluminum, or a non-metal such as a resin, from the viewpoint of preventing electrolytic corrosion (electric corrosion). .

  As shown in FIG. 2, the brush 30 is opposite to the cutter 20 with respect to a virtual plane V passing through the tip E of the cutter 20 and perpendicular to the extending direction of the cutter 20 when viewed from the axial direction of the main body 10. It is arranged in the range.

  The brush 30 is disposed so that the brush wire 31 extends in the direction toward the axis C (the radial direction of the main body 10), and the tip of the brush wire 31 projects into the internal space S. Is done. Further, the brush 30 is arranged so that the longitudinal direction of the base portion 32 is parallel to the axis C. As shown in FIG. 1, the arrangement position of the brush 30 in the axial direction of the main body 10 is the same as the axial position where the end 31 a of the brush wire 31 in the axial direction of the main body 10 is the same as the tip E of the cutter 20. Or, it is arranged so as to be closer to the rear end side of the main body part 10 than the front end E. This is because only the outer periphery of the conductive wire 2a exposed by peeling off the coating 2b is polished.

  Here, for example, as shown in FIG. 5, the cable 2 that can use the cable sheath peeling tool 1 is a sheath 2 b made of an insulator such as cross-linked polyethylene, a vinyl sheath, and the like around a conducting wire 2 a made of aluminum or the like. It can be covered. The material of the conducting wire 2a and the coating 2b is not particularly limited. For example, the conducting wire 2a may be made of copper. Further, the coating 2b may be a single layer or a structure having two or more layers. The outer diameter (diameter) of the cable 2 including the sheath 2b can be set to, for example, 13 mm to 34 mm, and the outer diameter (diameter) of only the conductor 2a can be set to, for example, 7 mm to 24 mm. It is not limited to.

  The cable covering / peeling tool 1 according to the present embodiment has an exposed length restricting means 40 for restricting the length in the axial direction for peeling the covering 2b from the cable 2, that is, the exposed length L (see FIG. 5) of the conducting wire 2a. It has.

  The exposure length regulating means 40 is disposed in the internal space S of the main body 10. The exposed length restricting means 40 suppresses further insertion of the cable 2 by the tip of the conducting wire 2a from which the coating 2b has been peeled coming into contact with the tip surface 41. Thereby, the exposure length L of the conducting wire 2a can be regulated to a preset length.

  The exposed length regulating means 40 may be fixed in the main body 10, but it is preferable that the position of the exposed length regulating means 40 can be adjusted in the axial direction. According to this, the exposed length L of the conducting wire 2a can be adjusted as appropriate.

  Moreover, the cable coating peeling tool 1 of the present embodiment is configured to be connected to a rotary tool (not shown) such as an electric drill driver. Specifically, the cable coating peeling tool 1 includes a bit-shaped portion 50 that is provided on the other end (rear end) side of the main body portion 10 in the axial direction and extends in the axial direction. The bit-like portion 50 may be provided integrally with the exposure length regulating means 40 or may be detachably attached to the main body portion 10.

  When the coating 2b is peeled from the cable 2 by using the cable coating peeling tool 1 and the conductive wire 2a is polished, for example, the cable coating peeling tool 1 is used in a state of being attached to the rotary tool in advance. And the front-end | tip part of the cable 2 hold | gripped with one hand is inserted in the insertion port 11 of the cable coating peeling tool 1. FIG. The cable 2 is inserted until the front end surface of the sheath 2b of the cable 2 comes into contact with the regulation wall 15, and the rotary tool is activated to rotate the cable sheath peeling tool 1. By rotating the main body 10 around the cable 2, the cutting edge 21 of the cutter 20 spirally cuts the coating 2b of the cable 2, and the scissors cutting edge 22 peels off the conductor 2a. At the same time, the brush wire 31 is polished on the outer periphery of the conducting wire 2a by rotating the brush 30 around the conducting wire 2a exposed by peeling off the coating 2b. In addition, the coating 2b (chips) cut and peeled in a spiral shape is discharged from the discharge port 12.

  Here, in the cable sheath peeling tool 1 of the present embodiment, the arrangement position of the brush 30 is set within a predetermined range (seeing from the axial direction of the main body portion 10, passing through the tip E of the cutter 20 and extending the cutter 20. The range is limited to the range opposite to the cutter 20 with respect to the virtual plane V perpendicular to the current direction. As described above, since the outer periphery of the conducting wire 2a is not surrounded by the brush wire 31 over the entire circumference, it is possible to prevent the resistance when the conducting wire 2a is inserted and removed, and when the main body 10 is rotated too much. . Moreover, the fall of the peeling performance at the time of peeling the coating | coated 2b from the cable 2 with the cutter 20 can also be suppressed by arrange | positioning the brush 30 in said range. That is, for example, when the brush 30 is arranged not in the above range but in the range (on the right side of the two-dot chain line (V) in FIG. 2) with respect to the virtual plane V, the cable 2 is connected by the brush 30. Is pushed in the direction of escaping from the cutter 20 (left side in the figure), and the cutting edge of the cutter 20 (the cutting edge 21a of the cutting edge part 21 and the cutting edge 22a of the scissors cutting edge part 22) does not hit the cable 2 and peels off There is a possibility that the performance is lowered. However, in the cable coating peeling tool 1 of the present embodiment, since the brush 30 is disposed in a range opposite to the cutter 20 with respect to the virtual plane V, there is no such a possibility. Further, by arranging the brush 30 in the above range, the position of the screw 24 for fixing the cutter 20 is not limited.

  Further, in the process of polishing the conductive wire 2a, the conductive wire 2a that has received the pressing force by contacting the brush wire material 31 can appropriately escape (displace) to a region where the brush 30 is not provided. However, there is no risk that the lead will penetrate into the lead wire 2a and cause variations in polishing.

  Therefore, according to the cable coating peeling tool 1 of this embodiment, the outer periphery of the conducting wire 2a can be polished easily and reliably. For example, when the cable 2 having the aluminum conducting wire 2a is used, the coating 2b can be peeled off and the insulating oxide film formed on the surface of the conducting wire 2a can be easily and reliably removed. In addition, since the aluminum conductor 2a is lighter and less expensive than, for example, a copper conductor, the aluminum conductor 2a can be used, thereby reducing the cable installation work time and material costs. it can.

  In the cable covering / peeling tool 1 of the present embodiment, it is preferable that the brushes 30 are provided at a plurality of locations in the circumferential direction of the main body 10, and according to this, the conductor 2 a is more efficient and moderate. Can be polished. From the same viewpoint, it is desirable that the number of brushes 30 be two as in this example. Further, when two brushes 30 are installed, as shown in FIG. 2, the circumferential interval R between the two brushes 30 around the axis C is preferably within a range of 30 ° to 150 °. According to this, the conductive wire 2a can be more effectively polished.

  The arrangement position of the brush 30 in the axial direction of the main body 10 is such that the axial distance from the tip E of the cutter 20 shown in FIG. 1 to the end 31a of the brush wire 31 on the front side is within 5 mm. It is preferable to arrange | position. Thus, by arranging the brush wire 31 at the axial position close to the tip E of the cutter 20, it becomes possible to polish the outer periphery of the exposed conductor 2 a immediately after the coating 2 b is peeled off. Further, by reducing the axial distance between the cutter 20 and the brush wire 31, the main body 10 can be reduced in length in the axial direction, so that the main body 10 can be downsized. From the same viewpoint, it is most desirable that the end 31a of the brush wire 31 is disposed at the same axial position as the tip E.

  Further, the installation range of the brush wire 31 of the brush 30 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 cutter 20 to the tip surface 41 of the exposure length regulating means 40. .

  In the brush 30 of this example, the length W in the longitudinal direction of the base portion 32 on which the brush wire 31 is provided is 25 mm, and the length D in the short direction of the base portion 32 is 5 mm. Not limited to.

  Moreover, as shown in FIG. 6, it is preferable that the brush 30 is a circular-arc-shaped recessed part so that the front-end | tip part 31b of the brush wire 31 may follow the outer peripheral surface of the conducting wire 2a as a whole. According to this, the contact area with respect to the conducting wire 2a can be increased, and the polishing efficiency by the brush wire 31 can be increased.

  Moreover, it is preferable that inclination | tilt angle (theta) 1 (refer FIG. 1) with respect to the plane perpendicular | vertical to the axis C of the cutting-blade part 21 is 2.5 degrees-5 degrees. By setting the inclination angle θ1 to 2.5 ° or more, the cutting edge portion 21 is likely to bite into the sheath 2b of the cable 2 and the peeling work is facilitated. Further, by setting the inclination angle θ1 to 5 ° or less, the number of revolutions for peeling the coating 2b of the cable 2 can be increased moderately, and the conductor 2a can be sufficiently polished by the brush 30.

  Here, in the process of peeling the coating 2b from the cable 2, the coating 2b (chips) discharged from the discharge port 12 is wound around the cable 2 before peeling and entangled, thereby inhibiting the rotation of the main body 10 with respect to the cable 2. There is a risk that.

  On the other hand, in the cable sheath peeling tool 1 of this embodiment, the sheath 2b is prevented from being wound around the cable 2 and entangled by regulating the discharge direction of the sheath 2b peeled from the cable 2. Tangle prevention means is provided. Specifically, the inclination angle θ2 of the side wall inner surface 12a of the discharge port 12 shown in FIG. 1 with respect to the plane perpendicular to the axis C is configured to be 2.5 ° to 45 °. In addition, the side wall inner surface 12a of the discharge port 12 shown in FIG. 1 is the inner surface of the side wall located in the rear end side of the main-body part 10 in the discharge port 12. FIG. By setting the inclination angle θ2 in the above range, the coating 2b is smoothly discharged from the discharge port 12 toward the rear end side of the main body portion 10, and therefore the coating 2b discharged from the discharge port 12 is It becomes difficult to move to the cable 2 side before peeling, and the covering 2b can be prevented from being wound around the cable 2 and entangled. That is, in this example, the side wall inner surface 12a functions as an entanglement preventing means.

  Further, as shown in FIG. 7, a guide member 60 that guides discharge of the coating 2 b from the discharge port 12 toward the rear end side of the main body 10 may be attached to the discharge port 12. In this case, both the guide member 60 and the cutter 20 can be fixed to the main body 10 by using the screws 24 in a state where the guide member 60 is disposed so as to overlap the cutter 20. The guide member 60 in the illustrated example is a substantially triangular plate-like member, and a side surface 61 of the guide member 60 serves as a tangling prevention means for guiding the coating 2b discharged from the discharge port 12 to the rear end side of the main body 10. It has become. That is, the coating 2 b from the discharge port 12 is discharged through the space between the side surface 61 of the guide member 60 and the side wall inner surface 12 a of the discharge port 12. In addition, the shape of the guide member 60 and the attachment method to the main-body part 10 are not limited to the example of illustration, It can change suitably.

  In addition, the inclination angle θ1 of the cutting edge portion 21 of the cutter 20 with respect to the plane perpendicular to the axis C is 2.5 ° or more, and accordingly, the inclination angle of the side wall inner surface 12b on the front end side of the discharge port 12 is also 2 When the angle is 5 ° or more, the discharge of the coating 2b from the discharge port 12 can be guided toward the rear end side of the main body 10 without providing the guide member 60 as described above. That is, in this case, the side wall inner surface 12b on the front end side of the discharge port 12 functions as an entanglement preventing means.

  Further, a flange protruding from the outer peripheral surface of the main body 10 may be provided to prevent the covering 2b discharged from the discharge port 12 from moving to the cable 2 before peeling, or as a means for preventing entanglement. A chip breaker mechanism as a means for preventing entanglement may be provided in the cutter 20 so that the coating 2b discharged from the outlet 12 is cut at an appropriate length.

  Although the present invention has been described based on the illustrated examples, the present invention is not limited to the above-described embodiment, and can be appropriately changed within the scope of the claims. For example, the previous embodiment In the above, the cable sheath peeling tool 1 is configured to rotate using a rotary tool. However, the cable sheath stripping tool 1 may be rotated by rotating the cable sheath stripping tool 1 while directly holding it by a hand without being attached to the rotary tool. . Further, the brush 30 is not limited to the channel brush as described above. For example, a needle cloth in which a metal needle is implanted in a base cloth, or a brush wire is spirally arranged on the inner peripheral surface of a cylindrical winding core. A channel roll brush or the like may be used.

1: Cable sheath peeling tool 2: Cable 2a: Conductor 2b: Cover 10: Main body 11: Insertion port 12: Discharge port 12a: Side wall inner surface (entanglement preventing means)
12b: Side wall inner surface (entanglement preventing means)
13: Blade attachment part 14: Brush attachment part 15: Restriction wall 20: Cutter (blade)
21: Cutting blade portion 22: Cutter blade portion 23: Through hole 24: Screw 30: Brush 31: Brush wire material 31a: End portion of brush wire material 32: Base portion 33: Mounting bracket 34: Through hole 35: Screw 40: Exposure length Length regulating means 41: Front end surface 50: Bit-shaped portion 60: Guide member 61: Guide surface (entanglement preventing means)
C: Axis E: Tip of the blade L: Exposure length V: Virtual plane S: Internal space

Claims (3)

A cable sheath peeling tool for stripping the sheath of a cable provided with a sheath around a conductor wire while cutting it spirally with a blade body,
A hollow main body having an insertion port for inserting the cable at one end in the axial direction, and a discharge port for discharging the coating peeled off from the cable on the side surface;
The blade provided on a side surface of the main body, and
A brush that is provided on the main body and polishes the outer periphery of the conductive wire from which the coating has been stripped,
The brush is disposed only in a range opposite to the blade body with respect to a virtual plane passing through the tip of the blade body and perpendicular to the extending direction of the blade body as viewed from the axial direction of the main body. A cable coating peeling tool characterized by comprising: The brush has a long base portion in which a plurality of brush wires are implanted,
The cable coating peeling tool according to claim 1, wherein the longitudinal direction of the base portion is arranged so as to be parallel to the axis of the main body portion.   The cable covering peeling tool according to claim 1 or 2, further comprising an entanglement preventing means for preventing the covering peeled off from the cable from being wound around the cable before being peeled off.

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