JP2020089148A - Electric wire peeling tool - Google Patents

Abstract

To provide an electric wire peeling tool capable of peeling off a coating of an electric wire with less work amount, and suppressing a core wire from being damaged.SOLUTION: In an electric wire peeling tool 1, a fixed cutter 8 is projected to an inner side of electric wire holding parts 4 and 5 in view from a rotational axial direction. In a movable cutter 9, one part is overlapped with the fixed cutter 8 in view of a direction vertical to a rotational axis A, and is attached to cutter holding parts 6 and 7 so as to be projected or retailed to/from the inside of the electric wire holding parts 4 and 5 in view of the rotational axis A direction. A spacer 11 is fixed to the movable cutter 9, and is projected inside of the electric wire holding parts 4 and 5 from the movable cutter 9 in view of the rotational axis A direction, and is overlapped with the fixed cutter 8 in view of the direction vertical to the rotational axis A. An elastic member 17 energizes the movable cutter 9 and the spacer 11 in a direction projecting to the inside of the electric wire holding parts 4 and 5.SELECTED DRAWING: Figure 6

Description

The present invention relates to a wire peeling tool.

In distribution work, the wires may be stripped to connect them. As a method of stripping the coating of an electric wire, a method of stripping the coating in a spiral shape (hereinafter, referred to as “spiral stripping”) is known. In the spiral peeling, the blade attached to the tool is rotated around the central axis of the electric wire and is advanced in the extending direction of the electric wire to remove the coating in a predetermined section. In such a spiral peeling, the contact area between the blade and the coating of the electric wire is small, and thus the resistance when peeling the coating is small. However, in the spiral stripping, the work in the predetermined section is gradually stripped off, so that the work amount tends to increase. Further, in the spiral peeling, the coating is stripped while advancing the blade in the extending direction of the electric wire, so that a trace of the blade first biting into the coating remains on the end surface after stripping the coating. That is, in the spiral peeling, after the coating is peeled off, the end surface of the remaining coating is not flat. Due to this uneven end surface, it is difficult to attach the protective cover to the predetermined section where the coating is peeled off.

Therefore, a method has been proposed in which the coating of a predetermined section is stripped at once (hereinafter referred to as "collective peeling"). In batch stripping, the coating can be stripped by rotating the blade once around the center axis of the electric wire, and thus the amount of work is smaller than in spiral stripping. Further, in the collective stripping, unlike the spiral stripping, the coating is not stripped while advancing the blade in the extending direction of the electric wire. Therefore, after stripping the coating, the end surface of the coating remaining is flat, and the protective cover is easily attached.

Batch peeling is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-261432 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2017-147907 (Patent Document 2).

Patent Literature 1 and Patent Literature 2 disclose a tool to which one blade having a predetermined blade width is attached, and this tool rotates the blade once around the central axis of the electric wire to cause a predetermined section to move. The coating can be stripped.

JP, 6-261432, A JP, 2017-147907, A

However, in batch peeling as disclosed in Patent Document 1 and Patent Document 2, since the coating of a certain section is stripped at once, the resistance applied to the blade when stripping the coating is large, and the blade and the operator are burdened. Is big.

Further, there is a core wire inside the coating of the electric wire, and the core wire is formed by twisting a plurality of metal wires. The twisting direction of this core wire cannot be confirmed before stripping the coating. Since the force that the coating receives from the blade is transmitted to the core wire, if the direction in which the blade is rotated is the opposite direction to the twisting of the core wire in the collective peeling, the core wire receives the force in the untwisting direction. When the twist of the core wire is unraveled, the diameter of the core wire becomes large, so that the core wire may hit the blade and be damaged.

That is, the spiral peeling has a small resistance when peeling the coating, but the work amount is large, and the collective peeling has a small work amount, but the resistance when peeling the coating is large.

An object of the present invention is to provide an electric wire stripping tool capable of removing the coating of the electric wire with a small amount of work and suppressing damage to the core wire.

The wire stripping tool for stripping the coating of an electric wire according to the present invention includes a main body unit and a blade unit. The blade unit is attached to the main body unit and is rotated about the rotation axis by the main body unit. The blade unit includes an electric wire holding portion, a blade holding portion, a fixed blade, a movable blade, a spacer, and an elastic member. The electric wire holder can hold the electric wire by opening and closing the blade unit. The blade holding portion is adjacent to the electric wire holding portion along the rotation axis direction. The fixed blade is fixed to the blade holding portion and protrudes inside the electric wire holding portion when viewed from the rotation axis direction. The movable blade partially overlaps with the fixed blade when viewed in a direction perpendicular to the rotation axis, and is attached to the blade holding section so as to project or retract inside the electric wire holding section when viewed from the rotation axis direction. The spacer is fixed to the movable blade, protrudes more toward the inside of the electric wire holding portion than the movable blade when viewed from the rotation axis direction, and overlaps with the fixed blade when viewed from the direction perpendicular to the rotation axis. The elastic member urges the movable blade and the spacer in a direction of projecting to the inside of the electric wire holding portion.

According to the wire stripping tool of the present invention, it is possible to strip the coating of the wire with a small amount of work, and it is possible to prevent the core wire from being damaged.

FIG. 1 is a perspective view of the wire stripping tool of the first embodiment. FIG. 2 is a perspective view of the wire stripping tool of the first embodiment when the blade unit is opened from the state shown in FIG. FIG. 3 is a perspective view showing a state in which the electric wire stripping tool according to the first embodiment is stripping the coating of the electric wire. FIG. 4 is a perspective view of the blade unit according to the first embodiment. FIG. 5: is the figure which looked at the electric wire peeling tool of 1st Embodiment from the front end side along the rotating shaft direction. FIG. 6 is a diagram in which the fixed guide and the movable guide are removed from the blade unit shown in FIG. FIG. 7 is a sectional view taken along line VII-VII in FIG. FIG. 8: is the figure which looked at the electric wire peeling tool of 1st Embodiment from the direction perpendicular|vertical to a rotating shaft. FIG. 9 is a schematic view of the movable blade, the fixed blade, and the spacer of FIG. 8 as viewed from a direction perpendicular to the rotation axis. FIG. 10 is a view of the wire stripping tool of the first embodiment before holding the wires, as viewed from the tip side along the rotation axis direction. FIG. 11: is the figure which looked at the electric wire peeling tool of 1st Embodiment holding the electric wire from the front end side along the rotating shaft direction. FIG. 12 is a view of the wire stripping tool of the first embodiment after the blade unit has rotated from the state shown in FIG. 11, as seen from the tip side along the rotation axis direction. FIG. 13: is a perspective view of the electric wire peeling tool of 2nd Embodiment. FIG. 14 is a perspective view of the blade unit according to the second embodiment. FIG. 15 is a view of the blade unit according to the second embodiment as seen from the tip side along the rotation axis direction. FIG. 16 is a diagram near the tip of the movable blade.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts will be denoted by the same reference symbols and description thereof will not be repeated.

[First Embodiment]
FIG. 1 is a perspective view of the wire stripping tool of the first embodiment. The wire stripping tool 1 includes a blade unit 2 and a main body unit 3.

[Main unit]
The main body unit 3 rotates the blade unit 2 around the rotation axis A. The main body unit 3 includes, for example, a gear inside the housing, and the gear transmits the rotational driving force transmitted via the insulating operation rod 10 to the blade unit 2, thereby rotating the blade unit 2. The main body unit 3 and the blade unit 2 are fixed by, for example, a plunger, a bolt or the like. The rotation axis A means the rotation axis of the main body unit 3. Since the main body unit 3 has a well-known configuration, description of other detailed structures will be omitted.

[Blade unit]
FIG. 2 is a perspective view of the wire stripping tool of the first embodiment when the blade unit is opened from the state shown in FIG. The blade unit 2 can be opened and closed. The electric wire 20 is inserted into the blade unit 2 with the blade unit 2 opened, and the electric wire 20 is held by closing the blade unit 2.

FIG. 3 is a perspective view showing a state in which the electric wire stripping tool according to the first embodiment is stripping the coating of the electric wire. The blade unit 2 rotates around the rotation axis A to strip off the coating 21 of the electric wire. After stripping off the coating 21, the blade unit 2 is opened, the electric wire is taken out, and a connection work with another electric wire is performed. When stripping the coating, an electric wire stripping tool is attached to the insulating operation rod 10. Hereinafter, the blade unit 2 will be described in detail.

FIG. 4 is a perspective view of the blade unit according to the first embodiment. The blade unit 2 includes electric wire holders 4, 5, blade holders 6, 7, a fixed blade 8, a movable blade 9, a spacer 11, and an elastic member.

[Wire holding part]
The wire holding portion includes a fixed wire holding portion 4 and a movable wire holding portion 5.

The fixed wire holding portion 4 includes a curved surface that is curved when viewed from the rotation axis A direction, and extends along the rotation axis A.

The movable wire holding portion 5 includes a curved surface that is curved when viewed from the rotation axis A direction, and extends along the rotation axis A. The movable electric wire holding portion 5 makes a pair with the fixed electric wire holding portion 4. The movable electric wire holding portion 5 is hinged to the fixed electric wire holding portion 4 and the hinge portion 13, and is rotatable around the hinge portion 13 with respect to the fixed electric wire holding portion 4 in conjunction with opening and closing of the blade unit 2. .. The curved surface of the movable electric wire holder 5 faces the curved surface of the fixed electric wire holder 4 in the rotation direction of the movable electric wire holder 5.

That is, by opening and closing the blade unit 2, the movable electric wire holding portion 5 is brought close to or away from the fixed electric wire holding portion 4 to hold or release the electric wire. The curved surface of the movable electric wire holder 5 and the curved surface of the fixed electric wire holder 4 have a curvature that matches the outer peripheral shape of the electric wire to be held or is smaller than the radius of the electric wire.

The blade unit 2 may further include a fixed guide 31 and a movable guide 32. The fixed guide 31 is arranged at the tip of the fixed wire holding portion 4. The fixed guide 31 includes a curved surface that is curved when viewed from the rotation axis A direction, and this curved surface projects slightly inward (rotation axis A side) from the curved surface of the fixed wire holding portion 4. The movable guide 32 is arranged at the tip of the movable electric wire holder 5. The movable guide 32 includes a curved surface that is curved when viewed from the rotation axis A direction, and this curved surface projects slightly inward (rotation axis A side) from the curved surface of the movable wire holding portion 5.

By thus providing the fixed guide 31 and the movable guide 32, the electric wire can be held on both sides instead of being cantilevered, and the electric wire can be held more stably.

[Blade holder]
The blade holding unit holds a fixed blade 8 and a movable blade 9, which will be described later. The blade holding unit includes a fixed blade holding unit 6 and a movable blade holding unit 7.

The fixed blade holding unit 6 holds a movable blade 9 described later. The fixed blade holding unit 6 rotatably holds the movable blade 9 by a pin 14 as described later. The fixed blade holder 6 is integral with the fixed wire holder 4.

The movable blade holding unit 7 holds a fixed blade 8 described later. The movable blade holding unit 7 includes, for example, a flat surface extending in the rotation axis A direction, and holds the fixed blade 8 by fixing the fixed blade 8 on the flat surface. The movable blade holder 7 is integral with the movable wire holder 5. For example, the wall thickness portion of a member obtained by vertically dividing a cylinder can be used as the movable blade holding portion 7, and the inner peripheral surface of the cylinder can be used as the movable electric wire holding portion 5.

[Fixed blade]
The fixed blade 8 removes the coating of the electric wire. The fixed blade 8 is fixed to the movable blade holder 7. The fixing method is not particularly limited, but it is preferable to use a method such as screwing that can firmly fix.

The blade edge of the fixed blade 8 is arranged along the direction of the rotation axis A. The length of the blade edge of the fixed blade 8 in the direction of the rotation axis A (hereinafter, referred to as “blade width”) is more than half the length of the section for stripping the coating of the electric wire in consideration of the overlapping portion with the movable blade described later. A little long.

FIG. 5: is the figure which looked at the electric wire peeling tool of 1st Embodiment from the front end side along the rotating shaft direction. That is, FIG. 5 is viewed in the direction from the blade unit toward the main body unit. The fixed blade 8 protrudes inward (the rotation axis A side) from the curved surface of the movable wire holding portion 5 when viewed from the rotation axis A direction. The protruding amount of the fixed blade 8 is less than or equal to the thickness of the coating of the target electric wire.

[Movable knife]
The movable blade 9 strips off the coating of the electric wire. The movable blade 9 is attached to the fixed blade holder 6. The movable blade 9 is attached to the fixed blade holding portion 6 so as to be able to project or retract inside the curved surface of the fixed electric wire holding portion 4 (on the rotation axis A side). A more specific mounting method of the movable blade 9 will be described with reference to FIG.

FIG. 6 is a diagram in which the fixed guide and the movable guide are removed from the blade unit shown in FIG. The movable blade 9 has a through hole at a position at a predetermined distance from the cutting edge, and the pin 14 is inserted into the through hole to be attached to the fixed blade holder 6. The pin 14 is inserted in the direction along the rotation axis A. As a result, the movable blade 9 can rotate about the pin 14, and can project inside the curved surface of the fixed wire holding portion 4 (on the rotation axis A side) or can be retracted outside the curved surface. You can The amount of protrusion of the movable blade 9 is less than or equal to the thickness of the target electric wire coating.

FIG. 7 is a sectional view taken along line VII-VII in FIG. The amount of protrusion of the movable blade 9 is preferably controlled by the stopper screw 18 provided on the movable blade holding portion. The stopper screw 18 can come into contact with a portion of the movable blade 9 closer to the cutting edge than the pin 14, and the stopper screw 18 comes into contact with the movable blade 9 to stop the rotation of the movable blade 9. In FIG. 7, two stopper screws for positioning the movable blade 9 and a stopper screw for preventing the positioning stopper screw from loosening are shown, but one stopper screw may be used.

The blade edge of the movable blade 9 is arranged along the direction of the rotation axis A. The blade width of the movable blade 9 is a little longer than half the length of the section for stripping the coating of the electric wire, like the fixed blade 8 described above. Further, the orientation of the blade edge of the movable blade 9 in the circumferential direction of the rotation axis A is the same as the orientation of the blade edge of the fixed blade 8. That is, when the blade unit rotates in one direction, both the movable blade 9 and the fixed blade 8 rotate in the direction of stripping the coating of the electric wire.

FIG. 8: is the figure which looked at the electric wire peeling tool of 1st Embodiment from the direction perpendicular|vertical to a rotating shaft. When viewed from a direction perpendicular to the rotation axis A, a part of the movable blade 9 overlaps with the fixed blade 8. This point will be described using a schematic diagram.

FIG. 9 is a schematic view of the movable blade, the fixed blade, and the spacer of FIG. 8 as viewed from a direction perpendicular to the rotation axis. That is, in the present specification, "a part of the movable blade overlaps with the fixed blade" means that the end surface 16 of the movable blade 9 on the fixed blade 8 side is the end surface of the fixed blade 8 on the movable blade 9 side in the rotation axis A direction. It means that it is located closer to the center of the fixed blade 8 than 15, and includes the case where the end surface 16 of the movable blade on the fixed blade side is at the same position as the end surface 15 of the fixed blade on the movable blade side.

[Elastic member]
With reference to FIG. 6, the elastic member 17 urges the movable blade 9 and the spacer 11 in a direction of protruding inward of the fixed wire holding portion 4 (on the rotation axis A side). For example, as shown in FIG. 6, the elastic member 17 attaches the pin 14 on the side opposite to the cutting edge of the movable blade 9 in the direction in which the movable blade 9 and the spacer 11 project inside the fixed wire holding portion 4. You may encourage. Further, the elastic member 17 may urge the blade edge side of the movable blade 9 with the pin 14 interposed therebetween in a direction in which the movable blade 9 and the spacer 11 project toward the inside of the fixed wire holding portion 4.

In short, the biasing positions of the movable blade 9 and the spacer 11 by the elastic member 17 are not particularly limited as long as the movable blade 9 and the spacer 11 are biased in the direction in which they project inside the fixed wire holding portion 4. The elastic member 17 is, for example, a spring, rubber or the like.

[Spacer]
With reference to FIG. 9, the spacer 11 is fixed to the end surface 16 of the movable blade 9 on the fixed blade 8 side. Therefore, the spacer 11 can move integrally with the movable blade 9. The fixing method is not particularly limited, but it is preferable to use a method such as screwing that can firmly fix. The material of the spacer is, for example, resin or the like.

With reference to FIG. 6, the spacer 11 projects inside the curved surface of the fixed wire holding portion 4 (on the rotation axis A side) from the movable blade 9 when viewed in the rotation axis direction. This is the same when the movable blade 9 is retracted outside the fixed wire holding portion 4 or when it is projected inward.

Referring to FIG. 9, the spacer 11 overlaps with the fixed blade 8 when viewed from the direction perpendicular to the rotation axis A. Here, in the present specification, “the spacer overlaps with the fixed blade” means that, in the rotation axis A direction, both end surfaces of the spacer 11 in the rotation axis direction are fixed blades rather than the end surface 15 of the fixed blade 8 on the movable blade 9 side. 8 means that the end surface 23 of the spacer 11 on the fixed blade 8 side is at the same position as the end surface 15 on the movable blade side of the fixed blade and the end surface 24 on the opposite side. Therefore, the length of the spacer 11 in the rotation axis A direction is shorter than the blade width of the fixed blade 8.

The spacer 11 having such a configuration detects the end of stripping of the electric wire coating by the fixed blade 8. Hereinafter, this point will be described together with the operation of stripping the coating of the wire by the wire stripping tool of the first embodiment.

[Operation of wire stripping tool]
FIG. 10 is a view of the wire stripping tool of the first embodiment before holding the wires, as viewed from the tip side along the rotation axis direction. 10 to 12, the fixed guide and the movable guide at the tip of the blade unit are not shown. When holding the electric wire 20, the blade unit 2 is opened and the electric wire 20 is accommodated inside the fixed electric wire holding portion. Since the spacer 11 projects inside the fixed electric wire holding portion 4, the spacer 11 and the movable blade 9 are pushed up to the outside of the fixed electric wire holding portion 4 by accommodating the electric wire 20 in the fixed electric wire holding portion 4. Therefore, the movable blade 9 does not contact the electric wire 20. From this state, the movable electric wire holder 5 is rotated to close the blade unit 2, and the electric wire 20 is held by the movable electric wire holder 5 and the fixed electric wire holder 4.

FIG. 11: is the figure which looked at the electric wire peeling tool of 1st Embodiment holding the electric wire from the front end side along the rotating shaft direction. When the movable electric wire holding portion 5 and the fixed electric wire holding portion 4 hold the electric wire, the fixed blade 8 projects into the movable electric wire holding portion 5, so that the fixed blade 8 bites into the coating 21 of the electric wire. From this state, the main body unit is operated to rotate the blade unit 2 around the rotation axis A. Here, since the curved surface of the movable electric wire holding portion 5 and the curved surface of the fixed electric wire holding portion 4 substantially coincide with the outer peripheral shape of the electric wire, the rotation axis A substantially coincides with the central axis of the electric wire. Therefore, when the blade unit 2 makes one rotation, the fixed blade 8 strips the coating 21 of the electric wire over the entire circumference.

As described above with reference to FIG. 9, the spacer 11 overlaps with the fixed blade 8 when viewed from the direction perpendicular to the rotation axis A. Therefore, when the electric wire is held, the spacer 11 is in contact with the coating of the electric wire stripped off by the fixed blade 8.

With reference to FIG. 11, when the fixed blade 8 strips off the coating 21, the coating with which the spacer 11 is in contact no longer exists. Since the spacer 11 is urged by the elastic member 17 so as to project to the inside of the fixed wire holding portion 4, the spacer 11 is placed inside the fixed wire holding portion 4 if the coating with which the spacer 11 is in contact no longer exists. With the protrusion, the movable blade 9 also protrudes inside the fixed wire holding portion 4. That is, the spacer 11 plays a role of detecting that the fixed blade 8 has stripped off the coating 21 of the electric wire.

FIG. 12 is a view of the wire stripping tool of the first embodiment after the blade unit has rotated from the state shown in FIG. 11, as seen from the tip side along the rotation axis direction. As described above, the movable blade 9 partially overlaps with the fixed blade 8 when viewed from the direction perpendicular to the rotation axis A. Therefore, when the blade unit 2 rotates and the fixed blade 8 strips off the wire coating 21, the portion of the movable blade 9 that does not overlap the fixed blade 8 bites into the wire coating 21.

When the blade unit 2 further rotates from this state, the movable blade 9 strips off the coating 21 of the electric wire which has not been stripped off by the fixed blade 8, and the stripping of the coating of the electric wire in the predetermined section is completed. The timing at which the spacer 11 projects inside the fixed electric wire holding portion 4, that is, the timing at which the movable blade 9 starts to peel off the coating 21 can be appropriately adjusted by the arrangement angle of the spacer 11 and the fixed blade 8 around the rotation axis A. ..

[Effect of suppressing work load and core wire damage]
According to the wire stripping tool of the first embodiment as described above, the coating of the wire in the predetermined section can be stripped by rotating the blade unit 2, and the coating of the wire can be stripped with a smaller amount of work than in the spiral stripping. Can be taken.

In addition, according to the wire stripping tool of the first embodiment, the coating of the wire in the predetermined section is stripped in the order of the fixed blade 8 and the movable blade 9 in two steps. Therefore, the contact area between the blade and the coating is smaller than in the case of batch peeling, and thus the resistance when peeling the coating can be reduced. Therefore, even if the direction in which the fixed blade 8 and the movable blade 9 are rotated is opposite to the twisting direction of the core wire 22, the force applied to the core wire in the untwisting direction at the time of stripping off the coating can be small. Therefore, the twisting of the core wire is difficult to unravel and the diameter of the core wire is unlikely to increase, so that the fixed blade 8 and the movable blade 9 can be prevented from damaging the core wire.

In the above description, the fixed blade 8 is fixed to the movable blade holder 7, and the movable blade 9 is attached to the fixed blade holder 6. However, the wire stripping tool of the first embodiment is not limited to this. In the wire stripping tool of the first embodiment, the fixed blade 8 may be fixed to the fixed blade holding portion 6 and the movable blade 9 may be attached to the movable blade holding portion 7.

In the above description, with respect to the arrangement of the fixed blade 8 and the movable blade 9 in the rotation axis direction, the fixed blade 8 is arranged on the main body unit 3 side, and the movable blade 9 is arranged on the movable electric wire holding portion 5 side (tip side). The case was explained. However, the wire stripping tool of the first embodiment is not limited to this. In the wire stripping tool of the first embodiment, the fixed blade 8 may be arranged on the fixed wire holding portion 4 side (tip side) in the rotation axis direction, and the movable blade 9 may be arranged on the main unit 3 side.

The wire stripping tool of the first embodiment has been described above. However, the electric wire peeling tool of the present invention is not limited to this, and the following embodiment can be adopted.

[Second Embodiment]
The wire stripping tool of the second embodiment will be described. In the following description of the wire stripping tool of the second embodiment, only the configuration different from that of the wire stripping tool of the first embodiment will be described, and description of the same configuration will be omitted.

FIG. 13: is a perspective view of the electric wire peeling tool of 2nd Embodiment. The wire stripping tool of the second embodiment is different from the wire stripping tool of the first embodiment in that both the fixed blade 8 and the movable blade 9 are attached to the movable blade holder 7.

[Blade holder]
FIG. 14 is a perspective view of the blade unit according to the second embodiment. The movable blade holding unit 7 includes a fixed mounting portion that holds the fixed blade 8 and a movable mounting portion that holds the movable blade 9. The fixed attachment portion is the same as the blade attachment portion of the first embodiment, so its explanation is omitted. The movable attachment portion includes a pin 14 extending from the movable electric wire holding portion 5 in the direction of the rotation axis A, and a support member 12.

[Movable knife]
The movable blade 9 is penetrated by a pin 14 of a movable mounting portion, and the movable blade 9 is configured to be rotatable around the pin 14. With such a configuration, the blade edge of the movable blade 9 when viewed from the direction of the rotation axis A can be projected or retracted inside the movable wire holding portion 5.

[Elastic member]
The elastic member 17 is, for example, a torsion coil spring. The elastic member 17 is attached to the pin 14 penetrating the movable blade 9, and urges the movable blade 9 and the spacer in a direction of protruding to the inside of the movable electric wire holding portion 5.

[Supporting member]
FIG. 15 is a view of the blade unit according to the second embodiment as seen from the tip side along the rotation axis direction. It should be noted that in FIG. 15, the members on the tip side of the blade unit are not shown and the internal structure is shown. The support member 12 is a rod-shaped member having a hook at its tip. An end portion of the support member 12 different from the hook is rotatably attached to the movable electric wire holding portion 5 by pinning or the like. The hook of the support member 12 can support the side of the movable blade 9 opposite to the cutting edge with the pin 14 penetrating the movable blade 9 interposed therebetween.

Since the movable blade 9 is biased by the elastic member, the cutting edge of the movable blade 9 tends to face the inside of the movable electric wire holding portion 5. If the rotation of the movable blade 9 is not controlled at all, there is a possibility that the blade tip of the movable blade 9 may be an obstacle when inserting the wire into the wire holding portion, or the coating of the wire may be damaged by touching the coating of the wire. There is.

Therefore, when the blade unit 2 is opened, the hook of the support member 12 sandwiches the pin 14 of the movable blade 9 to support the portion on the side opposite to the blade edge, and the blade edge of the movable blade 9 is inside the movable wire holding portion 5. Prevent turning to. This makes it easier to hold the electric wire and further suppress damage to the coating of an unintended portion.

Further, the support member 12 is located inside the curved surface of the movable wire holding portion 5 when viewed from the rotation axis direction. Since the support member 12 is located at this position, the coating of the electric wire hits the support member 12 when the blade unit 2 is closed, and the hook of the support member 12 is removed from the movable blade 9.

In the above description, the case where both the fixed blade 8 and the movable blade 9 are attached to the movable blade holder 7 has been described. However, the wire stripping tool of the second embodiment is not limited to this. In the wire stripping tool of the second embodiment, both the fixed blade 8 and the movable blade 9 may be attached to the fixed blade holding portion 6.

In the above description, the fixed blade 8 and the movable blade 9 are arranged in the rotation axis direction such that the fixed blade 8 is arranged on the main body unit 3 side and the movable blade 9 is arranged on the movable electric wire holding portion 5 side (tip side). The case was explained. However, the wire stripping tool of the second embodiment is not limited to this. In the wire stripping tool of the second embodiment, the fixed blade 8 may be arranged on the fixed wire holding portion 4 side (tip side) and the movable blade 9 may be arranged on the main body unit 3 side in the rotation axis direction.

The wire stripping tool of the second embodiment has been described above. Next, another preferred embodiment common to the first embodiment and the second embodiment will be described.

[Other Embodiments]
FIG. 16 is a diagram near the tip of the movable blade. It is preferable that the protrusion amount D of the spacer 11 from the movable blade 9 becomes smaller toward the tip of the movable blade 9. The reason for this will be described by taking the wire stripping tool of the first embodiment as an example.

As described above, until the stripping of the coating by the fixed blade is completed, the portion of the spacer 11 protruding inward of the movable electric wire holding portion with respect to the movable blade 9 is in contact with the coating 21. Therefore, the movable blade 9 does not strip the coating 21 until the spacer 11 reaches the place where the coating stripped by the fixed blade was located.

However, when the spacer 11 reaches the place where there was the coating stripped off by the fixed blade 8, the coating 21 on which the spacer 11 was in contact disappears, so that the spacer 11 and the movable blade 9 rotate about the pin. , So as to project inside the movable wire holding portion. At this time, if the projection amount D of the spacer 11 from the movable blade 9 is constant up to the tip (blade edge) of the movable blade 9, the tip of the movable blade 9 is at a position separated from the core wire 22 by the protrusion amount D or more. Therefore, the movable blade 9 does not easily bite deeply into the coating 21, and the coating 21 is difficult to peel off.

Therefore, by reducing the protrusion amount D of the spacer 11 from the movable blade 9 toward the tip of the movable blade 9, when the spacer 11 is in contact with the core wire 22, from the core wire 22 where the tip of the movable blade 9 is located. The distance (projection amount D) becomes smaller, and it becomes easier to penetrate deeply into the coating 21.

In the above description, the case where the protrusion amount D of the movable blade 9 is controlled by the stopper screw has been described, but the control of the protrusion amount D of the movable blade 9 is not limited to this case. For example, the protrusion amount D of the movable blade 9 may be controlled by applying the spacer 11 to the core wire 22.

As explained above,
(1) The wire stripping tool for stripping the electric wire coating of the present embodiment includes a main body unit and a blade unit. The blade unit is attached to the main body unit and is rotated about the rotation axis by the main body unit. The blade unit includes an electric wire holding portion, a blade holding portion, a fixed blade, a movable blade, a spacer, and an elastic member. The electric wire holder can hold the electric wire by opening and closing the blade unit. The blade holding portion is adjacent to the electric wire holding portion along the rotation axis direction. The fixed blade is fixed to the blade holding portion and protrudes inside the electric wire holding portion when viewed from the rotation axis direction. The movable blade partially overlaps with the fixed blade when viewed in a direction perpendicular to the rotation axis, and is attached to the blade holding section so as to project or retract inside the electric wire holding section when viewed from the rotation axis direction. The spacer is fixed to the movable blade, protrudes more toward the inside of the electric wire holding portion than the movable blade when viewed from the rotation axis direction, and overlaps with the fixed blade when viewed from the direction perpendicular to the rotation axis. The elastic member urges the movable blade and the spacer in a direction of projecting to the inside of the electric wire holding portion.

(2) In the wire stripping tool of (1) above, it is preferable that the amount of protrusion of the spacer from the movable blade becomes smaller toward the tip of the movable blade.

(3) In the electric wire stripping tool according to (1) or (2), the electric wire holding portion includes a fixed electric wire holding portion, and a movable electric wire holding portion that can be brought close to or separated from the fixed electric wire holding portion by opening and closing the blade unit. It is preferable to include In this case, the blade holding unit includes a fixed blade holding unit that is adjacent to the fixed electric wire holding unit along the rotation axis direction, and a movable blade holding unit that is adjacent to the movable electric wire holding unit along the rotation axis direction. The fixed blade is fixed to the movable blade holder and protrudes inside the movable wire holder when viewed from the rotation axis direction.The movable blade is fixed so that it can project or retract inside the fixed wire holder when viewed from the rotation axis direction. It is attached to the blade holder.

(4) In the electric wire stripping tool according to (1) or (2), the electric wire holding portion includes a fixed electric wire holding portion, and a movable electric wire holding portion that can be moved close to or away from the fixed electric wire holding portion by opening and closing the blade unit. It is preferable to include In this case, the blade holding unit includes a fixed blade holding unit that is adjacent to the fixed electric wire holding unit along the rotation axis direction, and a movable blade holding unit that is adjacent to the movable electric wire holding unit along the rotation axis direction. The fixed blade is fixed to the movable blade holder and protrudes inside the movable electric wire holder when viewed from the rotation axis direction.The movable blade is movable so as to project or retract inside the movable electric wire holder when viewed from the rotation axis direction. It is attached to the blade holder.

The embodiments of the present invention have been described above. However, the embodiments described above are merely examples for implementing the present invention. Therefore, the present invention is not limited to the above-described embodiments, and can be implemented by appropriately modifying the above-described embodiments without departing from the spirit thereof.

1: Wire peeling tool 2: Blade unit 3: Main body unit 4: Fixed wire holding part 5: Movable wire holding part 6: Fixed knife holding part 7: Movable knife holding part 8: Fixed knife 9: Movable knife 11: Spacer 17: Elastic member 20: Electric wire 21: Coating 22: Core wire A: Rotating shaft D: Projection amount

Claims (4)

An electric wire peeling tool for peeling off the electric wire coating,
Main unit,
A blade unit attached to the main body unit and rotated about a rotation axis by the main body unit,
The blade unit,
An electric wire holding portion capable of holding the electric wire by opening and closing the blade unit,
A blade holding portion adjacent to the electric wire holding portion along the rotation axis direction,
A fixed blade fixed to the blade holding portion and protruding inside the electric wire holding portion when viewed from the rotation axis direction,
A part of the fixed blade overlaps with the fixed blade when viewed from a direction perpendicular to the rotation axis, and a movable blade attached to the blade holding section so as to project or retract inside the wire holding section when viewed from the rotation axis direction,
A spacer fixed to the movable blade, protruding toward the inside of the electric wire holding portion from the movable blade when viewed from the rotation axis direction, and a spacer overlapping the fixed blade when viewed from a direction perpendicular to the rotation axis,
An electric wire stripping tool, comprising: the movable blade and the elastic member that urges the spacer in a direction of protruding toward the inside of the electric wire holding portion. The electric wire peeling tool according to claim 1,
The amount of protrusion of the spacer from the movable blade is smaller as it goes toward the tip of the movable blade. The electric wire peeling tool according to claim 1 or 2,
The electric wire holding portion,
Fixed wire holding part,
Includes a movable electric wire holding portion that can be moved close to or away from the fixed electric wire holding portion by opening and closing the blade unit,
The blade holder is
A fixed blade holding portion adjacent to the fixed electric wire holding portion along the rotation axis direction,
A movable blade holding portion adjacent to the movable electric wire holding portion along the rotation axis direction,
The fixed blade is fixed to the movable blade holding portion, and protrudes inside the movable electric wire holding portion when viewed from the rotation axis direction,
The electric wire peeling tool, wherein the movable blade is attached to the fixed blade holding portion so as to project or retract inside the fixed electric wire holding portion when viewed from the rotation axis direction. The electric wire peeling tool according to claim 1 or 2,
The electric wire holding portion,
Fixed wire holding part,
Includes a movable electric wire holding portion that can be moved close to or away from the fixed electric wire holding portion by opening and closing the blade unit,
The blade holder is
A fixed blade holding portion adjacent to the fixed electric wire holding portion along the rotation axis direction,
A movable blade holding portion adjacent to the movable electric wire holding portion along the rotation axis direction,
The fixed blade is fixed to the movable blade holding portion, and protrudes inside the movable electric wire holding portion when viewed from the rotation axis direction,
The electric wire peeling tool, wherein the movable blade is attached to the movable blade holding portion so as to project or retract inside the movable electric wire holding portion when viewed from the rotation axis direction.

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