JP2023073119A - Wire coating cutting jig and wire coating cutting method - Google Patents

Abstract

To easily cut the covering of an electric wire and to reduce the running cost.SOLUTION: A wire coating stripping jig 1 includes a housing 10 and a blade unit 25. The housing 10 is attachable to a wire 50 with a covering 52. The blade unit 25 includes a blade portion 27 projecting inside the housing 10. The blade unit 25 is replaceably attached to the housing 10.SELECTED DRAWING: Figure 1

Description

The present invention relates to incision of wire coating.

2. Description of the Related Art Conventionally, in an electric wire used for a wire harness or the like, the coating of the electric wire is cut with a jig in order to check the state of the core wire, for example. Patent Literature 1 discloses this type of wire coating stripping jig.

In the jig disclosed in Patent Document 1, an elongated cutting edge is provided along the axial direction on the inner peripheral surface of the tubular main body. By attaching the tubular body of the jig to the electric wire and moving the electric wire or the main body, the cutting edge cuts open the covering portion. Since the height of the cutting edge is substantially the same as the thickness of the coating, the wires are prevented from being damaged.

JP 2008-182799 A

In the configuration of Patent Literature 1, the entire jig must be replaced when the cutting edge wears with use. Therefore, the conventional configuration has room for improvement in that the running cost increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to enable easy cutting of the coating of the electric wire and to reduce the running cost.

Means and Effects for Solving Problems

The problems to be solved by the present invention are as described above. Next, the means for solving the problems and the effects thereof will be described.

According to a first aspect of the present invention, there is provided a jig for wire coating cutting having the following configuration. That is, the wire coating cutting jig includes a tubular member and a blade unit. The cylindrical member can be attached to a coated electric wire. The blade unit has a blade projecting inside the tubular member, and is replaceably attached to the tubular member.

This allows the blade to easily cut open the coating. In addition, when the blade wears out, maintenance can be performed simply by replacing the blade unit, so the running cost can be reduced.

In the wire coating cutting jig, it is preferable that a blade unit can be selected from a plurality of blade units according to the diameter of the coated wire and attached to the tubular member.

As a result, it becomes possible to cut open the coating of various electric wires by exchanging the blade unit.

In the wire coating cutting jig, when the cylindrical member is attached to the coated wire, the tip of the blade may be between the inner peripheral surface and the outer peripheral surface of the coating when it enters the coating. preferable.

This prevents the blade from reaching the inside of the covering. Therefore, damage to the core wire can be avoided.

In the wire coating cutting jig, it is preferable that the blade unit includes a plurality of blades that are arranged in the circumferential direction of the tubular member and are spaced apart in the circumferential direction.

This allows multiple cuts to be made in the coating at one time. Therefore, workability is improved.

It is preferable that the jig for cutting wire covering described above has the following configuration. That is, the tubular member includes a first portion and a second portion that can be joined together. By releasing the joining of the first portion and the second portion, it is possible to expose the internal space of the tubular member. The blade unit is attached to each of the first portion and the second portion.

Thereby, a plurality of blade units can efficiently form cuts in the coating. By releasing the joint between the first portion and the second portion, it is possible to facilitate replacement of each blade unit.

It is preferable that the above jig for wire coating cutting is provided with a locking portion capable of locking the first portion and the second portion joined together.

As a result, it is possible to prevent the jig for wire coating cutting from coming off the wire during work.

In the above jig for wire coating cutting, it is preferable that the blade unit can be moved toward the inside of the tubular member and away from the inside by operating the tubular member from the outside.

Thus, by operating the jig for wire coating cutting, the blade can be plunged into the coating only when necessary.

It is preferable that the jig for cutting wire covering described above has the following configuration. That is, the wire covering cutting jig has an operation surface that is exposed to the outside of the cylindrical member and that can be pushed. By transmitting the pushing operation of the operation surface to the blade unit, the blade unit moves toward the inner side of the cylindrical member.

This allows the blade to plunge into the coating with a simple operation.

In the above jig for wire coating cutting, it is preferable that the operation surfaces are arranged in a pair with the center of the cylindrical member interposed therebetween.

As a result, the operation force is applied so as to pinch the electric wire, so that the blade can be strongly thrust into the covering. Therefore, working efficiency is improved.

It is preferable that the above jig for wire coating cutting comprises a biasing member that biases the blade unit away from the inner side of the cylindrical member.

As a result, the blade is retracted in a direction away from the wire except when necessary, so that the coating can be prevented from being damaged.

It is preferable that the jig for cutting wire covering described above has the following configuration. That is, the jig for wire coating cutting includes a pressing member having a pressing surface facing the inner side of the cylindrical member. The pressing surface can contact the outer peripheral surface of the covering.

This makes it possible to apply force to the coating with a simple operation.

In the wire coating cutting jig, it is preferable that the pressing member can be moved toward and away from the inner side of the cylindrical member by operating the cylindrical member from the outside.

This allows the hold-down member to come into contact with the covering only when necessary.

In the wire coating cutting jig, it is preferable that the blade unit has projections that are arranged in an axial direction with respect to the blade.

As a result, the cut formed in the axial direction by the blade can be easily spread and broken by the projection.

According to a second aspect of the present invention, there is provided the following wire coating cutting method. That is, the method of cutting the wire covering includes a mounting step, a first cut forming step, a second cut forming step, and a third cut forming step. In the mounting step, a wire coating cutting jig having a cylindrical member that can be mounted on the coated electric wire and a replaceable blade unit having a blade projecting inside the cylindrical member is mounted on the coated electric wire. In the first incision forming step, the wire coating cutting jig is rotated with respect to the coated wire, and a circumferential cut is formed in the coating by the blade. In the second incision forming step, the wire coating cutting jig is moved in the longitudinal direction of the coated wire, and a longitudinal cut is formed in the coating by the blade. In the third cut forming step, the wire coating cutting jig is rotated with respect to the coated wire at a position different from that in the first cut forming step, and a circumferential cut is formed in the coating by the blade.

Thus, by forming a plurality of cuts, the coating can be easily peeled off.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the whole structure of the wire coating stripping jig which concerns on one Embodiment of this invention. Fig. 4 is a perspective view showing the second half of the housing opened with respect to the first half; FIG. 4 is an exploded perspective view showing the configuration around the second half; FIG. 4 is a perspective view showing an example of multiple types of blade units; The figure which shows the 1st cut formation process for stripping off an electric wire. The figure which shows a 2nd incision formation process. The figure which shows a 3rd incision formation process. The figure explaining the operation|work which moves a wire coating stripping jig after a 3rd cut|incision formation process is completed. The figure explaining the operation|work which presses the coating|cover with which the notch was formed, and moves it to an axial direction. The figure which shows the state which the covering of the circumferential direction was completely broken, and the core wire was exposed. The perspective view which shows the whole structure of the wire coating stripping jig of a modification.

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the overall configuration of a wire coating stripping jig 1 according to one embodiment of the present invention. FIG. 2 is a perspective view showing how the second half 12 of the housing 10 is opened with respect to the first half 11 . FIG. 3 is an exploded perspective view showing the configuration around the second half 12. As shown in FIG.

A wire coating stripping jig (wire coating cutting jig) 1 shown in FIG. In FIG. 1, the housing 10 and the electric wire 50 are depicted transparently by dashed lines.

The housing 10 is formed in a cylindrical shape. A columnar internal space 15 is formed to penetrate the housing 10 . An electric wire 50 can be passed through the internal space 15 . The electric wire 50 includes a core wire 51 and a coating 52 . The coating 52 has a constant thickness and covers the outer circumference of the core wire 51 .

The housing 10 has a first half (first portion) 11 and a second half (second portion) 12 . The first half portion 11 and the second half portion 12 are each formed to have a semicircular cross section.

One end of the first half 11 and one end of the second half 12 are connected to each other by a hinge structure 13 shown in FIG. This hinge structure 13 allows the second half 12 to be opened and closed with respect to the first half 11 . The opening of the second half 12 relative to the first half 11 is shown in FIG. In this state, the electric wire 50 can be inserted into and removed from the internal space 15 of the housing 10 .

A claw portion 16 is provided at the end portion of the first half portion 11 opposite to the hinge structure 13 . A hook 17 is provided at the end of the second half 12 opposite to the hinge structure 13 . A lock mechanism is configured by the claw portion 16 and the hook portion 17 . By fixing the claw portion 16 to the hook portion 17, the first half portion 11 and the second half portion 12 can be locked in a closed state.

The inner diameter of the internal space 15 shown in FIG. 1 is formed larger than the outer diameter of the electric wire 50 . Therefore, with the electric wire 50 set in the internal space 15 , the housing 10 can be moved along the longitudinal direction of the electric wire 50 or rotated around the electric wire 50 .

Two slide bodies 21 are attached to the housing 10 . One slide 21 is arranged in the first half 11 and the other one in the second half 12 .

Each slide body 21 is formed to be cylindrical and elongated. The two slide bodies 21 are arranged with their axes aligned. A small disk-shaped operating portion 22 is integrally formed at one longitudinal end of each slide body 21 . The operating portion 22 is arranged outside the housing 10 .

As shown in FIG. 3, a cylindrical collar 23 is arranged to cover the outer circumference of the slide body 21 . The collar 23 is arranged between the operation portion 22 and a blade unit 25 which will be described later. When the operator pushes the operating portion 22 toward the housing 10 , the collar 23 can transmit the operating force to the blade unit 25 .

A return spring (elastic member, biasing member) 24 is arranged on the outer periphery of the collar 23 . The return spring 24 is configured as a coil spring. A return spring 24 is arranged between the housing 10 and the operating portion 22 .

The slide body 21 and the collar 23 are inserted into a radially formed through hole 18 of the housing 10 . The slide body 21, the operating portion 22 and the collar 23 can move along the through hole 18 with an appropriate stroke.

As shown in FIG. 1, on one axial side of the wire coating stripping jig 1, two slide bodies 21 are arranged so as to face each other. A blade unit 25 is attached to the end of each slide body 21 . Two blade units 25 are arranged inside the housing 10 .

Each blade unit 25 comprises a base 26 and two blades (blades) 27 .

The base 26 is a suitably curved elongated member. As shown in FIG. 3, a penetrating hole 29 is formed in the center of the base 26 . A claw formed at the tip of the slide body 21 can be hooked in the hole 29 and fixed.

The blade portions 27 are arranged at both ends of the arc-shaped base 26 . Each blade portion 27 protrudes from the base 26 toward the internal space 15 formed in the housing 10 . The tip of each blade 27 is arranged to face the center of the housing 10 . The blade portion 27 is formed in a needle shape, for example. Therefore, the blade portion 27 can incise the covering 52 in any direction.

Each blade portion 27 is arranged at an angle of approximately 45° with respect to the longitudinal direction of the slide body 21 . The angle formed by the two blades 27 is about 90°. The two blades 27 are arranged symmetrically with respect to the slide body 21 .

As shown in FIG. 1, the two blade units 25 are arranged to face each other. Therefore, the four blades 27 are arranged in the circumferential direction at regular intervals of 90 degrees. The four blades 27 are arranged so as to divide the outer circumference of the electric wire 50 into four.

A blade unit 25 is fixed to the slide body 21 . Therefore, the blade unit 25 can slide along the longitudinal direction of the slide body 21 integrally with the slide body 21 , the operating portion 22 and the collar 23 . This sliding movement allows the blade unit 25 to move between the protruded position and the retracted position. By pushing the operation part 22 in a direction approaching the housing 10, the blade unit 25 moves from the retracted position to the projecting position.

The blade portion 27 protrudes into the internal space 15 when the blade unit 25 is at the projecting position. The blade portion 27 is retracted from the internal space 15 when the blade unit 25 is at the retracted position.

A wire 50 can be set in the internal space 15 of the housing 10 . In this state, when the blade unit 25 is at the projecting position, the blade portion 27 projects into the coating 52 of the electric wire 50 from the outside. When the blade unit 25 is at the retracted position, the blade portion 27 does not enter the coating 52. - 特許庁

The protruding length of the blade portion 27 is slightly smaller than the thickness of the covering 52 to be incised. Therefore, when the blade portion 27 plunges into the coating 52 , the tip of the blade portion 27 is positioned between the outer peripheral surface and the inner peripheral surface of the coating 52 . Since the blade portion 27 does not penetrate the coating 52 and reach the core wire 51, it is possible to prevent the core wire 51 inside from being damaged.

The base 26 is arranged to face the cylindrical inner space 15 . The base 26 has an arc-shaped concave portion that generally follows the outer peripheral surface of the electric wire 50 to be set. Thereby, the base 26 can be brought close to the outer peripheral surface of the electric wire 50 when the blade unit 25 is moved to the projecting position. As a result, the blade portion 27 can be smoothly penetrated into the coating 52 .

The return spring 24 applies an elastic force to the operating portion 22 in a direction to move the blade unit 25 to the retracted position. Accordingly, when no operating force is applied to the operating portion 22, the blade unit 25 is held at the retracted position.

A surface of the operation portion 22 facing the outer peripheral side of the housing 10 is an operation surface that can be touched by an operator's finger. When the operator applies force to press the pair of operation surfaces (operation portions 22 ) toward the housing 10 , the four blade portions 27 of the two blade units 25 plunge into the coating 52 .

The blade unit 25 is detachable from the slide body 21 . Therefore, for example, when the blade portion 27 is worn out due to long-term use, the sharpness of the blade portion 27 can be restored by replacing the blade unit 25 with a new one.

A plurality of (two) blade units 25 attached to the wire coating stripping jig 1 have the same configuration. As a result, it is possible to reduce the trouble of managing maintenance parts.

In this embodiment, for example, as shown in FIG. 4, a plurality of blade units 25 and 25a are prepared according to electric wires 50 having different diameters. By selecting the blade units 25 and 25a according to the diameter of the target electric wire 50 from which the coating 52 is to be stripped and attaching them to the housing 10 (specifically, the slide body 21), the housing 10 can be used in common while the size can be reduced. The coating 52 of wires 50 of various diameters can be cut. A plurality of blade units having different projecting lengths of the blade portions 27 according to the thickness of the coating 52 may be prepared.

As shown in FIG. 1, two slide bodies 31 are attached to the housing 10 in addition to the slide body 21 described above. One slide 31 is arranged on the first half 11 and the other one on the second half 12 . Since the structure of the slide body 31 is the same as that of the slide body 21 described above, the description thereof is omitted.

An operating portion 32, a collar 33, and a return spring 34 are arranged on each portion of the slide body 31. As shown in FIG. Since the configurations of the operation portion 32, the collar 33 and the return spring 34 are the same as those of the operation portion 22, the collar 23 and the return spring 24 described above, the description thereof will be omitted.

A holding unit 35 is attached to the end of each slide body 31 . The pressing unit 35 is arranged inside the housing 10 .

The pressing unit 35 includes a pressing member 36 .

The pressing member 36 is an appropriately curved plate-like member. As shown in FIG. 3, a through hole 39 is formed in the center of the pressing member 36 . A claw formed at the tip of the slide body 31 can be hooked in the hole 39 and fixed.

When the operator applies force to press the pair of operating portions 32 toward the housing 10 , the pressing members 36 of the two pressing units 35 come into contact with the outer peripheral surface of the covering 52 .

In this embodiment, the slide body 21 , the operating portion 22 , the collar 23 , the return spring 24 and the blade unit 25 constitute an incision mechanism 60 . The slide body 31 , the operating portion 32 , the collar 33 , the return spring 34 and the pressing unit 35 constitute the pressing mechanism 70 .

As shown in FIG. 2, the inner wall of the housing 10 is formed with recesses that can accommodate the blade unit 25 and the pressing unit 35 . Each recess functions as a rotation stopper for the base 26 and the pressing member 36 .

Next, the stripping operation of the coating 52 using the wire coating stripping jig 1 will be described with reference to FIGS. 5 to 10. FIG.

As shown in FIG. 5 , the operator mounts the wire coating stripping jig 1 on the wire 50 . At this time, the mounting position of the wire coating stripping jig 1 is adjusted so that the blade portion 27 of the blade unit 25 is positioned at the end of the position where the coating 52 is to be stripped. The first half 11 and the second half 12 are closed and locked by the claw portion 16 and the hook portion 17 .

Subsequently, the operator rotates the wire coating stripping jig 1 as a whole with respect to the wire 50 while pressing the two operating portions 22 as indicated by the arrows in FIG. 5 . As a result, ring-shaped cuts are formed in the coating 52 by the four blades 27 .

FIG. 6 shows a state in which the wire coating stripping jig 1 is rotated 180° with respect to the wire 50 from the state in FIG. However, in the process shown in FIG. 5, it is sufficient if the circumferential cuts by the four blades 27 are connected to form a ring-shaped cut over the entire circumference. The four blades 27 are arranged at approximately 90° intervals. Therefore, it is sufficient to rotate the wire coating stripping jig 1 by an angle slightly exceeding 90°.

Subsequently, the operator moves the wire coating stripping jig 1 by an appropriate distance to one side of the wire 50 in the longitudinal direction while keeping the two operation portions 22 pressed. As a result, as shown in FIG. 7, the four blades 27 form axial cuts in the coating 52 .

Next, the operator rotates the wire coating stripping jig 1 as a whole with respect to the wire 50 again while pressing the two operating portions 22 . As a result, circumferential cuts are formed in the coating 52 by the four blades 27 .

FIG. 8 shows a state in which the wire coating stripping jig 1 is rotated 180° with respect to the wire 50 from the state in FIG. However, similarly to the above, it is sufficient to rotate the wire coating stripping jig 1 to an extent slightly exceeding the angular distance between the blades 27 .

Subsequently, the operator releases the pushed state of the operation part 22 and moves the wire coating stripping jig 1 in the direction opposite to the direction in which the wire coating stripping jig 1 was previously moved. The operator adjusts the position of the wire coating stripping jig 1 so that the holding unit 35 is positioned between the two ring-shaped cuts.

Next, the operator slightly moves the entire wire coating stripping jig 1 to one side in the axial direction while pressing the two operating portions 32 as shown by the arrows in FIG. move it to the side. As a result, the pair of pressing members 36 move axially across the coating 52, so that the two circumferentially cut portions of the coating 52 of the electric wire 50 are torn off and completely broken.

In this state, the operator unlocks the claw portion 16 and the hook portion 17 , opens the first half portion 11 and the second half portion 12 , and removes the wire coating stripping jig 1 from the wire 50 . After that, the notched portion of the coating 52 is stripped off by hand by the operator.

The coating 52 is cut not only in the circumferential direction but also in the axial direction, but as the coating 52 moves in the axial direction as indicated by the arrow in FIG. 9, the ends of the axial cuts are completely broken. can be expected. Manual stripping is simplified by grasping and pulling the coating 52 near the completely broken portion with fingers.

As described above, by using the wire coating stripping jig 1 of the present embodiment, the coating 52 can be stripped off from the wire 50 with a simple operation. Further, since the blade portion 27 can be made new only by replacing the blade unit 25, it is possible to cope with wear of the blade portion 27 while reducing the maintenance cost.

As described above, the wire coating stripping jig 1 of this embodiment includes the housing 10 and the blade unit 25 . The housing 10 is attachable to a wire 50 with a jacket 52 thereon. The blade unit 25 is replaceably attached to the housing 10 . The blade unit 25 has a blade portion 27 projecting inside the housing 10 .

Thereby, the coating 52 can be easily cut open by the blade portion 27 . Further, when the blade portion 27 is worn, maintenance can be performed only by replacing the blade unit 25, so the running cost can be reduced.

In the wire coating stripping jig 1 of the present embodiment, a plurality of blade units 25 can be selected according to the diameter of the wire 50 and mounted on the housing 10 .

Thereby, the coating 52 of the electric wire 50 of various diameters can be cut open.

In the wire coating stripping jig 1 of the present embodiment, when the housing 10 is attached to the wire 50 , the tip of the blade portion 27 is positioned between the inner peripheral surface and the outer peripheral surface of the coating 52 when it protrudes into the coating 52 . be.

This can prevent the blade portion 27 from completely penetrating the coating 52 . Therefore, damage to the core wire 51 can be avoided.

In the wire coating stripping jig 1 of the present embodiment, the blade unit 25 includes a plurality of blade portions 27 arranged in the circumferential direction of the housing 10 and spaced apart in the circumferential direction.

This allows multiple cuts to be formed in the coating 52 at one time. Therefore, workability is improved.

In the wire coating stripping jig 1 of this embodiment, the housing 10 includes a first half portion 11 and a second half portion 12 that can be joined together. By releasing the joining of the first half 11 and the second half 12, the internal space 15 of the housing 10 can be exposed. A blade unit 25 is attached to each of the first half 11 and the second half 12 .

Thereby, the plurality of blade units 25 can efficiently form cuts in the coating 52 . By releasing the joining of the first half portion 11 and the second half portion 12, each blade unit 25 can be easily replaced.

The wire coating stripping jig 1 of the present embodiment includes a lock portion composed of a claw portion 16 and a hook portion 17 . The locking part is lockable with the first half 11 and the second half 12 joined together.

As a result, it is possible to prevent the wire coating stripping jig 1 from coming off the wire 50 during work.

In the wire coating stripping jig 1 of this embodiment, the blade unit 25 can be moved toward the inside of the housing 10 and away from the inside by being operated from the outside of the housing 10 .

Accordingly, by operating the wire coating stripping jig 1, the blade portion 27 can be plunged into the coating 52 only when necessary.

In the wire coating stripping jig 1 of the present embodiment, the operation portion 22 is formed with an operation surface. The operation surface is exposed outside the housing 10 and can be pushed. The blade unit 25 moves toward the inner side of the housing 10 by transmitting the pushing operation of the operation surface to the blade unit 25 .

As a result, the blade portion 27 can be plunged into the coating 52 with a simple operation.

In the wire coating stripping jig 1 of the present embodiment, the operation surfaces of the operation portion 22 are arranged in pairs with the center of the housing 10 interposed therebetween.

As a result, the operation force is applied so as to sandwich the electric wire 50 , so that the blade portion 27 can be strongly thrust into the coating 52 . Therefore, working efficiency is improved.

The wire coating stripping jig 1 of this embodiment includes a return spring 24 that biases the blade unit 25 away from the inside of the housing 10 .

As a result, the blade portion 27 is retracted in a direction away from the electric wire 50 except when necessary, so that the covering 52 can be prevented from being damaged.

The wire coating stripping jig 1 of this embodiment includes a pressing member 36 having a pressing surface facing the inside of the housing 10 . The pressing surface can contact the outer peripheral surface of the coating 52 .

Thereby, force can be applied to the coating 52 with a simple operation.

In the wire coating stripping jig 1 of the present embodiment, the pressing member 36 can be moved toward the inside of the housing 10 and away from the inside by being operated from the outside of the housing 10 .

Thereby, the pressing member 36 can be brought into contact with the covering 52 only when necessary.

In this embodiment, the coating 52 of the electric wire 50 is cut by the method described below. That is, this wire coating cutting method includes a mounting step, a first incision forming step, a second incision forming step, and a third incision forming step. In the mounting step, the wire coating stripping jig 1 is mounted on the wire. The wire coating stripping jig 1 includes a housing 10 and a blade unit 25 . The housing 10 is attachable to a wire 50 with a jacket 52 thereon. The blade unit 25 has a blade portion 27 projecting inside the housing 10 and is replaceable. In the first cut forming step shown in FIG. 5 , the wire coating stripping jig 1 is rotated with respect to the wire 50 , and a circumferential cut is formed in the coating 52 by the blade portion 27 . In the second incision forming step shown in FIG. 6 , the wire coating stripping jig 1 is moved in the longitudinal direction of the wire 50 to form longitudinal cuts in the coating 52 by the blade portion 27 . In the third incision forming step shown in FIG. 7, the wire coating stripping jig 1 is rotated with respect to the wire 50 at a position different from that in the first incision forming step, and a circumferential incision is formed in the coating 52 by the blade portion 27. do.

Thus, by forming a plurality of cuts, the coating 52 can be easily peeled off.

Next, a modification of the above embodiment will be described.

A modified wire coating stripping jig 1x shown in FIG. 11 differs from the above-described embodiment in the configuration of a blade unit 25x. Specifically, the blade unit 25 x includes a projection 28 in addition to the blade portion 27 . The protrusion 28 is arranged adjacent to the blade portion 27 in the axial direction of the tubular housing 10 .

The projecting length of the protrusion 28 is configured to be slightly longer than the projecting length of the blade portion 27 . The protruding length of the blade portion 27 is slightly smaller than the thickness of the coating 52 to be incised, as in the above-described embodiment. The projection length of the protrusion 28 is slightly larger than the thickness of the coating 52 . Further, the tip of the projection 28 is configured as a smooth curved surface such as a spherical surface that is not sharp.

With this configuration, when the operator pushes the operating portion 22 of the wire coating stripping jig 1 , both the blade portion 27 and the protrusion 28 plunge into the coating 52 of the wire 50 . When the wire coating stripping jig 1 is moved to one side in the longitudinal direction of the wire 50 (specifically, in a direction in which the blade portion 27 precedes the protrusion 28), the cut formed by the blade portion 27 is It is pushed open by the projection 28 and completely broken. Therefore, it becomes easier to cut open the coating 52 along the axial cut.

As described above, in the wire coating stripping jig 1x of this modified example, the blade unit 25x has the projections 28 that are arranged in line with the blade portion 27 in the axial direction.

As a result, the cut formed in the axial direction by the blade portion 27 can be easily expanded by the protrusion 28 and broken.

Although the preferred embodiments and modifications of the present invention have been described above, the above configuration can be modified as follows, for example. A single change may be made, or multiple changes may be made in any combination.

The blade units 25, 25x may be provided in the housing 10 so as not to slide. For example, the slide body 21 and the like can be omitted, and the blade units 25 and 25x can be directly screwed to the inner wall of the housing 10 by screwing. In this configuration, blade 27 penetrates sheath 52 of wire 50 at the same time first half 11 is closed to second half 12 .

In the above-described embodiment, the gap between the inner wall of the internal space 15 formed in the housing 10 and the outer peripheral surface of the wire 50 is small. However, a radial gap may be formed to some extent between the housing 10 and the wire 50 . In this case, in the operation of FIG. 10, the coating 52 having the cut formed runs over the outer circumference of the other coating 52 as indicated by the chain line, and as a result, the coating 52 is completely broken along the cut in the axial direction. can be expected. As a result, stripping work becomes easier.

In the modification of FIG. 11, the blade portion 27 and the protrusion 28 may be configured to be slidable independently of each other. In other words, the operating portion 22 into which the blade portion 27 is plunged and the operating portion into which the projection 28 is plunged may be provided separately.

The replaceable blade units 25 and 25x may include at least one of the slide body 21, the operating portion 22, the collar 23, and the return spring 24.

In the above embodiment, the pressing unit 35 is replaceable like the blade unit 25, but it may be attached so as not to be replaceable.

The pressing member 36 of the pressing unit 35 may be configured in the shape of a plane plate instead of the shape of an arc plate. In this case, a single pressing member 36 can press the coating 52 for wires 50 of various diameters.

In the blade unit 25, the number of blade portions 27 may be three or more, or may be one.

Only one slide body 21 , operating portion 22 , collar 23 , return spring 24 and blade unit 25 may be provided for the housing 10 .

A plate spring or the like may be used as the return springs 24 and 34 instead of the coil spring.

In the process shown in FIG. 9, the wire coating stripping jig 1 may be slightly rotated while the operation portion 32 is pressed.

The configuration for detachably attaching the blade units 25 and 25x to the slide body 21 is not limited to the use of claws as described above, and for example, screws can be used.

A lock mechanism by the claw portion 16 and the hook portion 17 may be omitted. In this case, for example, the first half 11 and the second half 12 are kept closed by using the force that pushes the two operation parts 22 .

The slide body 31, the operating portion 32, the collar 33, the return spring 34 and the pressing unit 35 may be omitted.

1 Wire coating stripping jig (wire coating cutting jig)
10 housing (cylindrical member)
15 internal space 25, 25a, 25x blade unit 27 blade part (blade)
28 projection 36 pressing member 50 electric wire 52 covering

Claims (15)

a cylindrical member that can be attached to a coated electric wire;
a blade unit having a blade protruding inside the tubular member and attached replaceably to the tubular member;
A jig for wire coating cutting, comprising: The wire coating cutting jig according to claim 1,
A jig for wire coating cutting, characterized in that it can be selected from a plurality of blade units according to the diameter of the coated wire and mounted on the cylindrical member. 3. The wire coating cutting jig according to claim 1 or 2,
A jig for wire coating cutting, wherein the tip of the blade is positioned between the inner peripheral surface and the outer peripheral surface of the coating when the cylindrical member is attached to the coated wire when the tip of the blade penetrates into the coating. The wire covering cutting jig according to any one of claims 1 to 3,
A jig for cutting wire covering, wherein the blade unit includes a plurality of blades arranged in a circumferential direction of the cylindrical member and arranged at intervals in the circumferential direction. The wire coating cutting jig according to any one of claims 1 to 4,
The cylindrical member includes a first portion and a second portion that can be joined together,
By releasing the joining of the first part and the second part, it is possible to expose the internal space of the cylindrical member,
A wire covering cutting jig, wherein the blade unit is attached to each of the first portion and the second portion. The wire coating cutting jig according to claim 5,
A jig for cutting wire covering, comprising a locking part capable of locking the first part and the second part joined together. The wire covering cutting jig according to any one of claims 1 to 6,
A jig for cutting wire covering, wherein the blade unit is movable in a direction toward the inner side of the cylindrical member and a direction away from the inner side of the cylindrical member by an operation from the outside of the cylindrical member. The wire covering cutting jig according to claim 7,
Equipped with an operation surface exposed to the outside of the cylindrical member and capable of being pushed,
A jig for wire coating cutting, wherein the blade unit moves toward the inner side of the cylindrical member by transmitting the pushing operation of the operation surface to the blade unit. The wire coating cutting jig according to claim 8,
A jig for wire coating cutting, wherein the operation surfaces are arranged as a pair across the center of the cylindrical member. The wire coating cutting jig according to any one of claims 7 to 9,
A jig for cutting wire covering, comprising a biasing member that biases the blade unit away from the inner side of the cylindrical member. The wire coating cutting jig according to any one of claims 1 to 10,
A pressing member having a pressing surface facing the inner side of the tubular member,
A jig for cutting a wire covering, wherein the pressing surface is capable of contacting an outer peripheral surface of the covering. The jig for wire coating cutting according to claim 11,
A jig for cutting wire sheathing, wherein the pressing member is movable in a direction toward the inner side of the cylindrical member and a direction away from the inner side of the cylindrical member by operating the cylindrical member from the outside. The wire coating cutting jig according to any one of claims 1 to 12,
A jig for wire coating cutting, wherein the blade unit has projections arranged in parallel with the blade in the axial direction. a mounting step of mounting a wire coating cutting jig including a tubular member attachable to a coated wire and a replaceable blade unit having a blade projecting inside the tubular member to the coated wire;
a first incision forming step of rotating the wire coating cutting jig with respect to the coated wire and forming a circumferential cut in the coating with the blade;
a second incision forming step of moving the wire coating cutting jig in the longitudinal direction of the coated wire and forming a longitudinal cut in the coating with the blade;
a third cut forming step of rotating the jig for cutting the wire coating with respect to the coated wire at a position different from that of the first cut forming step, and forming a circumferential cut in the coating with the blade;
A wire coating cutting method comprising: The wire coating cutting method according to claim 14,
A method for cutting wire covering, wherein the blade unit includes a plurality of blades arranged in a circumferential direction of the cylindrical member and spaced apart in the circumferential direction of the cylindrical member.

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