JP2019213274A - Electric wire stripping tool - Google Patents

Abstract

To provide an electric wire stripping tool capable of stripping an insulating coating over the overall circumference including the start point of a cut made by a cutting blade, and capable of avoiding generation of an unstripped part of the insulating coating.SOLUTION: An electric wire stripping tool 100 is configured by: a cutting blade for stripping an insulating coating H on an electric wire L; an electric wire fixation mechanism 300 for fixing the electric wire L; and a movement control mechanism 400 for controlling movement of the cutting blade toward the electric wire fixation mechanism 300. The movement control mechanism 400 is configured by: a rotary member 402 and a rotary projection 403 that rotate with the cutting blade; a cam plate 406 that has an engagement portion 436 to be engaged with the rotary projection 403 and is rotated by the rotary projection 403; and a movement control rod 412 that has one end attached to the electric wire fixation mechanism 300 and the other end coming into contact with the cam plate 406. A movement control rod through hole 428 which is positioned at the other end of the movement control rod 412 when the cutting blade is rotated once is formed in the cam plate 406.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wire stripping tool used for stripping and removing a certain length of insulation coating in an intermediate portion of a wire.

  In the construction of power distribution equipment, bypass work and grounding work may be performed to perform partial power outages. At that time, in order to form a bypass or grounding path, the insulation coating in the middle part of the electric wire is stripped, the core wire as a conductor is exposed, and the work for connecting the bypass device and the grounding device to the conductor remains in the live state. It is required to carry out with.

  In order to meet such demands, a wire stripping tool has been developed that allows an operator to directly cut an insulation coating at an intermediate portion of an electric wire without directly touching the electric wire or the like (for example, a patent) References 1 to 3). Then, after the predetermined construction is completed, restoration can be achieved by attaching a plastic insulating cover to the portion where the core wire is exposed.

  The wire stripping tools disclosed in Patent Documents 1 to 3 both strip the insulation coating by rotating the cutting blade for stripping the insulation coating in the middle portion of the wire in a spiral manner with respect to the longitudinal direction of the wire. It has become.

  Further, when the electric wire peeling tool is attached to or detached from the electric wire to be constructed, the electric wire peeling tool is opened.

No. 6-2414 JP 11-98639 A JP2013-192430A

  However, since the conventional wire stripping tool strips the insulating coating in a spiral manner as described above, it is oblique to the longitudinal direction of the wire from the “cutting start position of the cutting blade”, which is the location where the stripping of the insulating coating starts. Go on to. For this reason, since the insulation coating cannot be stripped over the entire circumference when viewed on a plane that is orthogonal to the central axis of the electric wire and includes this “cutting start position of the cutting blade”, the insulation coating remains unstriped. There is a problem that when the insulation cover is attached to the exposed part of the core wire after the construction is completed, the insulation cover may not be securely fixed due to the remaining uninsulated insulation. It was.

  The present invention has been made in view of such problems, and its purpose is to strip the insulating coating over the entire circumference when viewed in a plane perpendicular to the central axis of the electric wire, including the cutting start position of the cutting blade. An object of the present invention is to provide an electric wire stripping tool that can avoid the occurrence of stripping of the insulation coating.

According to one aspect of the present invention,
A cutting blade that peels off the insulation coating of the electric wire to expose the core wire by rotating around the central axis of the electric wire;
An electric wire fixing mechanism for fixing the electric wire;
A movement control mechanism for controlling the cutting blade to move toward the electric wire fixing mechanism;
The movement control mechanism is
A rotating member that rotates with the cutting blade;
A rotating convex portion protruding from the rotating member;
A cam plate that has an engaging portion that engages with the rotating convex portion, and is rotated by the rotating convex portion;
One end is attached to the electric wire fixing mechanism, and the other end has a movement control rod that contacts the cam plate,
The cam plate is formed with a movement control rod through hole 428 that comes to the position of the other end of the movement control rod when the cutting blade starts at least one rotation after the insulation coating is peeled off. A tool is provided.

Preferably,
The engaging portion has a first engaging portion and a second engaging portion,
The rotating convex portion temporarily engages with the first engaging portion after starting the stripping of the insulating coating, and then the second engaging portion immediately before the cutting blade makes one rotation. Engaging
A plunger is further provided for temporarily holding the cam plate in a state where the rotating convex portion is separated from the first engaging portion.

Preferably,
The cam plate is formed with a plunger pin insertion hole that comes to the position of the plunger when the rotating convex portion is separated from the first engaging portion.

  ADVANTAGE OF THE INVENTION According to this invention, the insulation coating can be stripped over the perimeter at the cutting start location of a cutting blade, and the wire stripping tool which can avoid that the insulation coating was not peeled off at the cutting start location could be provided.

1 is an exploded perspective view of a wire stripping tool 100 to which the present invention is applied. It is a front view which shows the wire peeling tool 100 with which this invention was applied. It is a perspective view including the front of the electric wire peeling tool 100 to which this invention was applied, a right side, and a plane. It is a perspective view including the front of the electric wire peeling tool 100 to which this invention was applied, a left side, and a plane. It is a perspective view including the back, left side, and plane of the wire stripping tool 100 to which the present invention is applied. It is a right view of the wire peeling tool 100 which shows the state which closed the opening-and-closing rotation mechanism 200. It is a right view of the electric wire peeling tool 100 which shows the state which opened the opening-and-closing rotation mechanism 200. FIG. It is a figure which shows the Example of the cam plate. It is a figure which shows the state which looked at the opening / closing rotation mechanism 200 side from the base member 302 of the electric wire fixing mechanism 300 in an origin position. It is a figure which shows the state which looked at the opening-and-closing rotation mechanism 200 side from the base member 302 of the electric wire fixing mechanism 300 in the position rotated a little from the origin position. FIG. 6 is a view showing a state in which the rotation convex portion 403 is viewed from the base member 302 of the electric wire fixing mechanism 300 when viewed from the opening / closing rotation mechanism 200 at a position away from the first engagement portion 432. It is a figure which shows the state which looked at the opening-and-closing rotation mechanism 200 side from the base member 302 of the electric wire fixing mechanism 300 in the position where the rotation convex part 403 began to engage with the 2nd engaging part 434. FIG. FIG. 10 is a view showing a state in which the opening / closing rotation mechanism 200 side is viewed from the base member 302 of the electric wire fixing mechanism 300 in which the movement control rod through hole 428 is located at the other end of the movement control rod 412. It is a rear view which shows the electric wire peeling tool 100 when starting peeling of the electric wire L. FIG. It is a rear view which shows the electric wire peeling tool 100 when the peeling of the electric wire L is complete | finished.

(Configuration of wire stripping tool 100)
FIG. 1 is an exploded perspective view showing a wire stripping tool 100 according to an embodiment to which the present invention is applied. The wire stripping tool 100 is generally disposed between the opening / closing rotation mechanism 200, the wire fixing mechanism 300 for fixing the electric wire L, and the opening / closing rotation mechanism 200 and the wire fixing mechanism 300. And a movement control mechanism 400 for controlling the opening / closing rotation mechanism 200 to move toward the electric wire fixing mechanism 300.

  Throughout this specification, the energizing member inside the electric wire is referred to as a core wire S, and the insulating member that covers the outside of the core wire S is referred to as an insulating coating H. Further, the entire core wire S covered with the insulating coating H is referred to as a covered electric wire L or simply as an electric wire L.

  The opening / closing rotation mechanism 200 has an opening / closing function that opens and closes when an operator operates using the operation rod B, and further has a rotation function that rotates by operation using the operation rod B, and the electric wire L is sandwiched between them. Thus, the insulating coating H is peeled off from the electric wire L by rotating the cutting blade 214 around the central axis CL of the electric wire L by the rotating function.

  The opening / closing rotation mechanism 200 will be briefly described with reference to FIGS. The opening / closing rotation mechanism 200 according to the present embodiment is roughly composed of a rotation base member 202, a rotation drive member 204, an opening / closing ring member 206, a holding member 208, an opening / closing cylindrical member 210, a cutting blade holding member 212, A cutting blade 214 and an open / close guide member 215 are provided.

  The rotation base member 202 further has a bevel gear 216 that rotates together with the operation rod B by rotation.

  The rotation driving member 204 has a gear 218 that meshes with the bevel gear 216 at the periphery thereof, and the rotation driving member 204 is also rotated by the rotation of the operation rod B by the rotation of the bevel gear 216. Further, the rotation drive member 204 is formed in half by the first member 220 and the second member 222. Further, an engagement pin 223 protrudes from the side surface of the second member 222.

  The open / close ring member 206 is a substantially “C” -shaped member, and generally includes a first ring member 224 and a second ring member 226. The first ring member 224 is attached to the first member 220 of the rotation drive member 204, and the second ring member 226 is attached to the second member 222 of the rotation drive member 204. Further, a disc-shaped cam follower 228 is projected from a side surface of the first ring member 224 that faces the holding member 208.

  The holding member 208 is a member having a substantially “C” cross section for holding the rotation driving member 204, the opening / closing ring member 206, and the like at predetermined positions, and a lower end portion is fixed to a side surface of the rotation base member 202. .

  The open / close cylindrical member 210 is a substantially cylindrical member, and the first cylindrical member 230, the second cylindrical member 232, one end portion of the first cylindrical member 230, and one end portion of the second cylindrical member 232 are mutually pivoted. It is comprised with the axial support pin 234 to support. Thus, the first cylindrical member 230 and the second cylindrical member 232 can be opened and closed with the pivot pin 234 as the center.

  The first cylindrical member 230 of the open / close cylindrical member 210 is attached to the first member 220 of the rotation driving member 204, and the second cylindrical member 232 is attached to the second member 222.

  The cutting blade holding member 212 is a substantially cylindrical member, and has a substantially “C” -shaped cutting blade mounting member 236 to which the cutting blade 214 is attached, and a cover that covers a notch in the cutting blade mounting member 236. And a member 238. One end portion of the cutting blade holding member 212 configured by combining the cutting blade mounting member 236 and the cover member 238 is formed to have a slightly small diameter, and this one end portion is inserted into the opening / closing cylindrical member 210. It is like that. The cutting blade attachment member 236 is attached to the second cylindrical member 232 of the open / close cylindrical member 210, and the cover member 238 is attached to the first cylindrical member 230.

  That is, the first ring member 224 of the opening / closing ring member 206, the first member 220 of the rotation driving member 204, the first cylindrical member 230 of the opening / closing cylindrical member 210, and the cover member 238 of the cutting blade holding member 212 are fixed to each other. It is formed substantially integrally. Further, the second ring member 226 of the opening / closing ring member 206, the second member 222 of the rotation driving member 204, the second cylindrical member 232 of the opening / closing cylindrical member 210, and the cutting blade mounting member 236 of the cutting blade holding member 212 are mutually connected. It is fixed and formed substantially integrally. 2 and 3, particularly, the cutting blade 214 is drawn so as to be attached in a direction perpendicular to the direction in which the cutting blade holding member 212 extends. However, as will be described later, the cutting blade 214 is insulated. When the opening / closing rotation mechanism 200 is moved with respect to the electric wire L by a reaction force that strips off H, the cutting blade 214 is preferably attached obliquely with respect to the direction in which the cutting blade holding member 212 extends.

  The opening / closing guide member 215 includes a locking hook 240 and a composite hook 242. The locking hook 240 is swingably attached to a side surface of the holding member 208 facing the opening / closing ring member 206, and a holding member side hook 244 is formed at the lower end thereof.

  The composite hook 242 is swingably attached on the side surface of the opening / closing ring member 206 facing the holding member 208. In addition, an engagement hook 246 that engages with an engagement pin 223 protruding from the second member 222 of the rotation drive member 204 is formed at the lower end of the composite hook 242, and an engagement hook 246 is engaged on the opposite side of the engagement hook 246. A holding member engaging hook 248 that engages with the holding member side hook 244 of the stop hook 240 is formed. Note that the engagement hook 246 and the holding member engagement hook 248 formed on the composite hook 242 are formed in opposite directions.

  The operation of the opening / closing rotation mechanism 200 will be briefly described. As shown in FIGS. 1 and 6, when the opening / closing rotation mechanism 200 is closed, the operation rod B is rotated to rotate the rotation driving member 204 counterclockwise in FIG. 1, the engagement hook 246 of the composite hook 242. Since the engagement state with the engagement pin 223 is maintained, each member rotates while maintaining the closed state.

  Next, the operation rod B is rotated in the reverse direction to rotate the rotation driving member 204 clockwise in FIG. Then, the holding member engaging hook 248 of the composite hook 242 engages with the holding member side hook 244 of the locking hook 240. When the operation rod B is further rotated in the reverse direction, the second member 222 of the rotation driving member 204 and the member attached substantially integrally with the operation rod B attempt to continue clockwise in the drawing, but are locked by the locking hook 240. The first ring member 224 to which the composite hook 242 is attached and the member attached substantially integrally with the first ring member 224 cannot continue clockwise, and are attached substantially integrally with the second member 222 of the rotation drive member 204 and this. The locking hook 240 is pushed out through the composite hook 242 so as to be pushed by the member. Accordingly, the first ring member 224 and the members attached substantially integrally with the shaft support pin 234 in the opening / closing cylindrical member 210 are respectively corresponding members (for example, the first ring member 224 corresponding to the first ring member 224). The opening / closing rotation mechanism 200 is opened (see FIG. 7). The direction when the first ring member 224 and the member attached substantially integrally with the first ring member 224 are separated from the corresponding members is a guide groove (on the side surface of the holding member 208 facing the opening / closing ring member 206 ( It is determined by the cam follower 228 being guided by a cam follower 228 (not shown).

  When the operating rod B is rotated forward from the open / close rotation mechanism 200 opened, the first ring member 224 of the open / close ring member 206 that has pushed the locking hook 240 outward approaches the second ring member 226 again, The composite hook 242 releases the engagement state with the locking hook 240 and engages with the engagement pin 223 again. Thereby, as explained first, the opening / closing rotation mechanism 200 can be rotated in a closed state. As a result of this rotation, the cutting blade 214 held by the cutting blade holding member 212 also rotates about the central axis CL of the electric wire L, and the insulation coating H of the electric wire L is peeled and removed. Then, the force by which the opening / closing rotation mechanism 200 moves toward the wire fixing mechanism 300 is urged by the reaction force that the cutting blade 214 peels off the insulation coating H.

  The wire fixing mechanism 300 will be described with reference to FIGS. 1 to 5 again. As described above, when the opening / closing rotating mechanism 200 rotates the cutting blade 214 and peels and removes the insulating coating H from the electric wire L, the electric wire fixing mechanism 300 rotates undesirably, In order to prevent deviation from the center position, the wire L is fixed at a predetermined position.

  The electric wire fixing mechanism 300 in the present embodiment generally includes a base member 302, an upper chuck 304, and a lower chuck 306.

  The base member 302 is a plate-like member in which a wire receiving groove 308 that receives the wire L is formed. The electric wire receiving groove 308 is formed in the same direction as the opening direction of the opening / closing rotation mechanism 200 (in FIG. 1, from the back side to the front side) so that the electric wire L can be received with the opening / closing rotation mechanism 200 open. Has been.

  The upper chuck 304 is attached to the side surface of the base member 302, and fixes the electric wire L in cooperation with the lower chuck 306. In the present embodiment, the upper chuck 304 includes a slide member 310, a boss 312, a slide screw 314, and an upper chuck member 316.

  The slide member 310 is a member for holding the upper chuck member 316 so as to be slidable to some extent in the vertical direction with respect to the base member 302. In the present embodiment, a substantially rectangular plate material is used. Further, a boss fitting insertion long hole 318 into which the tip end of the boss 312 is fitted is formed in the upper portion of the slide member 310. Further, a guide groove 319 for sliding the slide member 310 obliquely up and down with respect to the base member 302 is formed on the side surface of the base member 302.

  The boss 312 is a substantially columnar member for holding the slide member 310 slidably with respect to the base member 302, and the tip of the boss 312 can be inserted into the boss insertion long hole 318 of the slide member 310. The diameter of the part is smaller than that of the other parts. The rear end portion of the boss 312 is formed with a screw receiving recess 320 that opens to the rear end surface, and a hole through which the shaft portion of the slide screw 314 can be inserted is formed in the bottom surface of the screw receiving recess 320. Has been.

  The slide screw 314 is formed on the side surface of the base member 302 through the hole formed in the bottom surface of the screw receiving recess 320 of the boss 312 and the boss fitting insertion long hole 318 of the slide member 310. It is attached to the screw receiving hole 322. Thus, the slide member 310 can slide along the guide groove 319 with respect to the base member 302.

  The upper chuck member 316 is a member attached to the lower end of the slide member 310, and has a shape bent into a “h” shape. The position of the electric wire L can be stably held by applying the upper edge of the electric wire L to the center portion of the “H” shape.

  Since the upper chuck member 316 is attached to the lower end of the slide member 310 slidably held with respect to the base member 302, the upper chuck member 316 itself can also slide to some extent in the vertical direction. Yes. Thereby, even if the diameter of the electric wire L fixed with the electric wire fixing mechanism 300 changes, it can respond now by the position of the upper side chuck member 316 moving.

  The lower chuck 306 is attached to the side surface of the base member 302 and fixes the electric wire L in cooperation with the upper chuck 304 as described above. In the present embodiment, the lower chuck 306 includes a lever member 324, a lever member mounting screw 326, and a fixed operation rod mounting member 328.

  The lever member 324 has an attachment screw through-hole 330 formed at the center thereof, and is attached to the base member 302 so as to be rotatable about the attachment screw through-hole 330. A lower chuck portion 332 that fixes the electric wire L in cooperation with the upper chuck member 316 is formed at one end portion of the lever member 324, and a fixed operation rod mounting member 328 is provided at the other end portion of the lever member 324. Is attached to be rotatable.

  Thus, after the worker attaches the tip of the fixed operating rod C to the fixed operating rod mounting member 328, the lever member 324 rotates around the mounting screw through hole 330 by pulling the fixed operating rod C downward. Since the lower chuck portion 332 moves upward, the electric wire L can be fixed by the lower chuck portion 332 and the upper chuck member 316.

  The lower chuck portion 332 formed on the lever member 324 has a plurality of end surfaces 334 having different distances from the rotation center of the lever member 324 (attachment screw through hole 330). Thereby, even if the diameter of the electric wire L fixed with the electric wire fixing mechanism 300 changes, it can respond now by changing the end surface 334 contact | abutted to the said electric wire L. FIG.

  The movement control mechanism 400 will be described with reference to FIGS. The movement control mechanism 400 has a start position where the cutting blade 214 has cut into the insulation coating H when the opening / closing rotation mechanism 200 rotates the cutting blade 214 to separate and remove the insulation coating H from the electric wire L (hereinafter referred to as the start position). The position of the opening / closing rotating mechanism 200 is restricted from moving toward the electric wire fixing mechanism 300 along the longitudinal direction of the electric wire L until the position is referred to as “origin position”) for about one rotation. After one rotation, the restriction is released, and the opening / closing rotation mechanism 200 is moved until it comes into contact with the base member 302 of the wire fixing mechanism 300.

  In the present embodiment, the movement control mechanism 400 generally includes a rotation member 402, a rotation convex portion 403, a cam plate holding member 404, a cam plate 406, a plunger pin 408, a return member 410, and a movement control rod 412. , And a guide rod 414.

  The rotating member 402 is a plate material that is formed in a substantially “C” shape by forming a wire receiving notch 416 that receives the wire L in a substantially disk-shaped member, and is a second member in the opening / closing ring member 206 of the opening / closing rotating mechanism 200. It is fixed to the ring member 226 with four fixing pins 418. Further, the direction in which the second ring member 226 of the opening / closing rotation mechanism 200 is opened and the direction in which the wire receiving notch 416 is opened are the same so that the wire L can be received in the state where the opening / closing rotation mechanism 200 is open. The rotating member 402 is attached to the second ring member 226 so as to be oriented.

  The rotation convex portion 403 is a round bar-like (pin-like) member that protrudes outward from the side peripheral surface of the rotation member 402. In the present embodiment, the rotation convex portion 403 protrudes outward from the peripheral side surface of the rotation member 402 at a position facing the opening of the wire receiving notch 416. The shape of the rotating convex portion 403 is not limited to a round bar shape, and may be any shape as long as it protrudes outward from the side peripheral surface of the rotating member 402.

  The cam plate holding member 404 is a member for holding the cam plate 406 at a predetermined position, and is attached to the holding member 208 of the opening / closing rotation mechanism 200 in this embodiment. Further, a movement control rod insertion hole 420 through which the movement control rod 412 passes and a guide rod fitting insertion hole 422 into which the guide rod 414 is inserted are formed on the surface of the cam plate holding member 404 facing the base member 302. Yes.

  The cam plate 406 is a substantially disk-shaped member that is rotatably attached to a surface of the cam plate holding member 404 that faces the base member 302. The shape of the cam plate 406 will be described in detail with reference to FIG. 8. A mounting screw for rotatably mounting the cam plate 406 to the cam plate holding member 404 at the center of the main body 423 of the cam plate 406. An attachment screw insertion hole 426 through which 424 is inserted is formed.

  Further, a movement control rod through hole 428 through which the movement control rod 412 penetrates and a plurality of plunger pin insertion holes 430 through which the plunger pins 408 are inserted are formed in the body portion 423 of the cam plate 406 at appropriate positions. ing. In this embodiment, the plunger pin insertion hole 430 includes an initial position hole 430a at a position where the plunger pin 408 is inserted when the cam plate 406 is in the initial state, and the cam plate 406 is slightly clockwise in FIG. There are three plunger pin insertion holes 430, a middle position hole 430b in the rotated position and a final position hole 430c in which the movement control rod through-hole 428 of the cam plate 406 coincides with the movement control rod 412. .

  Further, a first engaging portion 432 and a second engaging portion 434 that engage with the rotating convex portion 403 project from the side peripheral surface of the main body 423 of the cam plate 406. In the present embodiment, only one engaging portion 436 protrudes from the side peripheral surface of the main body portion 423 of the cam plate 406, and the portion recessed in the “C” shape in the engaging portion 436 is the first engaging portion. The upper surface in the drawing (the surface indicated by reference numeral 434) in the engaging portion 436 corresponds to the second engaging portion 434. Of course, the shapes of the first engagement portion 432 and the second engagement portion 434 are not limited to those of the present embodiment. For example, the first engagement portion 432 and the second engagement portion 434 are separately provided. As a protrusion from the side peripheral surface of the main body 423.

  Returning to FIG. 1, the plunger pin 408 is a round bar-like member that protrudes from the surface of the cam plate holding member 404 toward the base member 302, and when an external force is applied in the direction in which the plunger pin 408 is pushed, The plunger pin 408 sinks into the cam plate holding member 404 by the mechanism, and when the external force is released, the plunger pin 408 protrudes from the cam plate holding member 404 again.

  The return member 410 is a member that biases the rotational force against the cam plate 406. In the present embodiment, a torsion spring is used as the return member 410, but the return member 410 is not limited to this, and other materials can be used.

  One end of the movement control rod 412 is fixed to the side surface of the base member 302 by a fixing screw 438 or the like, and the other end is a rod-like member extending toward the surface of the cam plate 406 where the movement control rod through hole 428 is formed. is there. The length of the movement control rod 412 is such that the other end of the movement control rod 412 just contacts the surface of the cam plate 406 facing the base member 302 when the opening / closing rotation mechanism 200 and the cam plate 406 are at the origin. Is set.

  Further, a movement control rod insertion hole 420 of the cam plate holding member 404 is provided at a position where the other end of the movement control rod 412 is extended along the longitudinal direction of the movement control rod 412.

  The guide rod 414 is a member that serves as a guide when the opening / closing rotation mechanism 200 moves toward the base member 302 of the wire fixing mechanism 300 while peeling the insulating coating H of the wire L with the cutting blade 214. In this embodiment, two guide bars 414 are used, but the number of guide bars 414 is not limited to this, and may be one or three or more.

  One end of the guide rod 414 is inserted into a guide rod insertion hole 336 formed on the side surface of the base member 302, and the other end of the guide rod 414 is inserted on the side surface of the cam plate holding member 404 as described above. The hole 422 is inserted and fixed. The length of the guide bar 414 is such that when the opening / closing rotation mechanism 200 and the cam plate 406 are at the origin positions, the other end penetrates the guide rod fitting insertion hole 422 and protrudes into the opening / closing rotation mechanism 200, or at least the guide It is located in the rod fitting insertion hole 422. Furthermore, the direction in which the guide bar 414 extends is parallel to the longitudinal direction of the electric wire L correctly fixed to the electric wire stripping tool 100.

(Operation of the wire stripping tool 100 according to the embodiment)
Next, the operation | movement which peels the insulation coating H of the electric wire L using the electric wire peeling tool 100 mentioned above is demonstrated. First, the operator reversely rotates the operation rod B to activate the opening / closing rotation mechanism 200 of the wire peeling tool 100, open the wire peeling tool 100 (the state shown in FIG. 7), and set the wire L at a predetermined position. Then, the operator closes the wire stripping tool 100 by rotating the operation rod B forward (state shown in FIGS. 6 and 14). In this state, the cutting blade 214 is cut into the insulation coating H of the electric wire L, and the cam plate 406 is set at the “cam plate origin position” as shown in FIG.

  In the present embodiment, the “cam plate origin position” is a position where the movement control rod through-hole 428 formed in the main body portion 423 of the cam plate 406 is displaced from the movement control rod 412 and the three plunger pins are inserted. The initial position hole 430 a of the holes 430 is at a position that coincides with the plunger pin 408, and the first engagement portion 432 is in a position that can be engaged with the rotation convex portion 403.

  When the operator further rotates the operating rod B forward from this state, the cutting blade 214 is rotated about the central axis CL of the electric wire L by the opening / closing rotating mechanism 200, and the insulation coating H is peeled off. Then, as shown in FIG. 10, the movement control mechanism 400 starts rotating the cam plate 406 in the clockwise direction in the drawing by the rotation convex portion 403 engaged with the first engagement portion 432 by the rotation of the rotation member 402.

  At this stage, the opening / closing rotating mechanism 200 tries to move toward the electric wire fixing mechanism 300 by the reaction force of the cutting blade 214 peeling off the insulating coating H, but the movement control rod 412 extending from the base member 302 of the electric wire fixing mechanism 300 Since the other end does not reach the position of the movement control rod through hole 428 formed in the cam plate 406, the movement control rod 412 has the cam plate 406, the cam plate holding member 404, and the opening / closing rotation mechanism 200 connected thereto. The movement toward the electric wire fixing mechanism 300 is stopped.

  When the operating rod B is further rotated forward, the rotating convex portion 403 rotates to a position away from the first engaging portion 432 as shown in FIG. Even at this stage, since the other end of the movement control rod 412 does not reach the position of the movement control rod through hole 428, the opening / closing rotation mechanism 200 still cannot move toward the wire fixing mechanism 300, and the cutting blade 214 peels off the insulation coating H on a plane orthogonal to the central axis CL of the electric wire L.

  Further, at this stage, the middle position hole 430b of the plunger pin insertion hole 430 comes to a position that coincides with the plunger pin 408. Therefore, the tip of the plunger pin 408 protruding from the cam plate holding member 404 by the retracting mechanism (not shown). The part fits into the middle position hole 430b. Thereby, even if the rotation convex part 403 leaves | separates from the 1st engaging part 432, the cam plate 406 opposes the rotational urging | biasing force from the return member 410, and hold | maintains the position shown in FIG.

  Thereafter, when the operating rod B is rotated forward, the cam plate 406 remains in the position shown in FIG. 11, so that the opening / closing rotating mechanism 200 can still move toward the wire fixing mechanism 300. Instead, the cutting blade 214 continues to strip off the insulating coating H on a plane orthogonal to the central axis CL of the electric wire L.

  When the cutting blade 214 makes about one rotation from the origin position, as shown in FIG. 12, the rotating convex portion 403 that has made one turn engages with the second engaging portion 434, and the rotating convex portion 403 becomes the cam plate 406. Is given a rotational force to rotate in the clockwise direction. By this rotational force, the peripheral edge of the plunger pin insertion hole 430 pushes the plunger pin 408 in a direction to be inserted into the cam plate holding member 404, the plunger pin 408 comes out of the plunger pin insertion hole 430, and the cam plate 406 It can be rotated.

  As shown in FIGS. 13 and 15, the movement control rod through-hole 428 is connected to the other end of the movement control rod 412 immediately before the opening / closing rotation mechanism 200 is further rotated and the rotation convex portion 403 is separated from the second engagement portion 434. Come to the position. At this time, the final position hole 430c of the plunger pin insertion hole 430 is located at a position that coincides with the plunger pin 408, and the distal end portion of the plunger pin 408 is fitted into the final position hole 430c. Thereby, even if the rotation convex part 403 leaves | separates from the 2nd engaging part 434, the cam plate 406 resists the rotational biasing force from the return member 410, and hold | maintains the position shown in FIG.

  Then, the opening / closing rotation mechanism 200 that can move toward the electric wire fixing mechanism 300, and the cam plate holding member 404 and the cam plate 406 attached thereto start moving toward the electric wire fixing mechanism 300, and movement control is performed. The other end of the bar 412 is fitted in the movement control bar through hole 428.

  When the other end of the movement control rod 412 is fitted in the movement control rod through-hole 428, the cam plate 406 is maintained in the state against the rotational biasing force from the return member 410. As the insulation coating H is peeled off, the opening / closing rotating mechanism 200 moves toward the electric wire fixing mechanism 300 by the peeling reaction force, and the rotating member 402 of the base member 302 is moved from a predetermined width (= the origin position). The insulation coating H of the electric wire L is peeled off by a distance until it comes into contact with the side surface. Thus far, the stripping operation of the electric wire L is completed.

  When the skinning operation is completed, the operator reversely rotates the operation rod B to open the opening / closing rotation mechanism 200, and further operates the lever member 324 of the wire fixing mechanism 300 to release the fixed state of the wire L. The wire stripping tool 100 is removed from L.

  After removal from the electric wire L, the opening / closing rotation mechanism 200 and the like are pushed back in the direction away from the electric wire fixing mechanism 300. When the opening / closing rotation mechanism 200, the cam plate holding member 404 and the cam plate 406 are pushed back to the origin position, the movement control rod 412 is pulled out from the movement control rod through hole 428. Then, the operator returns the cam plate 406 to the “cam plate origin position”.

(Characteristics of the wire stripping tool 100 according to the embodiment)
According to the wire stripping tool 100 according to the above-described embodiment, from the “cutting start position of the cutting blade 214” where the cutting blade 214 cuts into the insulating coating H with the electric wire L set, the cutting blade 214 makes one rotation. In the meantime, the movement of the opening / closing rotation mechanism 200 including the cutting blade 214 toward the electric wire fixing mechanism 300 is regulated by the movement control mechanism 400 (specifically, the movement control rod 412). The insulation coating H is stripped off in a direction orthogonal to the longitudinal direction (center axis CL) of the electric wire L. As a result, the insulation coating H can be stripped over the entire circumference when viewed in a plane perpendicular to the central axis CL of the wire L including the “cutting start position of the cutting blade 214” in the wire L. The rest can be avoided.

  Further, when the cutting blade 214 makes one rotation at the incision start position, the other end of the movement control rod 412 is fitted into the movement control rod through-hole 428 toward the electric wire fixing mechanism 300 of the opening / closing rotation mechanism 200 including the cutting blade 214. Therefore, the opening / closing rotating mechanism 200 including the cutting blade 214 is moved along the central axis CL of the electric wire L by the reaction force when the cutting blade 214 peels off the insulating coating H. Move towards. For this reason, the worker can continue the skinning operation simply by continuously rotating the operation rod B forward.

  In the above-described embodiment, the opening / closing rotating mechanism 200 is moved toward the electric wire fixing mechanism 300 by the reaction force of the cutting blade 214 stripping off the insulation coating H. However, the mechanism for moving the opening / closing rotating mechanism 200 is as follows. For example, as disclosed in “Patent Document 1”, a “spiral protrusion” is provided on the inner surface of the cutting blade mounting member 236 and the cover member 238 constituting the cutting blade holding member 212. Thus, a movement force of the opening / closing rotation mechanism 200 with respect to the electric wire L may be generated so that the opening / closing rotation mechanism 200 moves toward the electric wire fixing mechanism 300.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 100 ... Electric wire peeling tool 200 ... Opening / closing rotation mechanism, 202 ... Rotation base member, 204 ... Rotation drive member, 206 ... Opening / closing ring member, 208 ... Holding member, 210 ... Opening / closing cylindrical member, 212 ... Cutting blade holding member, 214 ... Cutting blade, 215 ... Opening / closing guide member, 216 ... Bevel gear, 218 ... Gear, 220 ... First member, 222 ... Second member, 223 ... Engaging pin, 224 ... First ring member, 226 ... Second ring member, 228 ... Cam follower, 230 ... First cylindrical member, 232 ... Second cylindrical member, 234 ... Shaft support pin, 236 ... Cutting blade mounting member, 238 ... Cover member, 240 ... Locking hook, 242 ... Composite hook, 244 ... Holding Member side hook, 246 ... engaging hook, 248 ... holding member engaging hook 300 ... electric wire fixing mechanism, 302 ... base member, 304 ... upper chuck, 306 ... lower side 308 ... Electric wire receiving groove, 310 ... Slide member, 312 ... Boss, 314 ... Slide screw, 316 ... Upper chuck member, 318 ... Boss insertion insertion hole, 319 ... Guide groove, 320 ... Screw receiving recess, 322 ... Screw receiving hole, 324 ... Lever member, 326 ... Lever member mounting screw, 328 ... Fixed operating rod mounting member, 330 ... Mounting screw through hole, 332 ... Lower chuck portion, 334 ... End face, 336 ... Guide rod insertion hole 400 ... Movement control mechanism, 402 ... rotating member, 403 ... rotating convex part, 404 ... cam plate holding member, 406 ... cam plate, 408 ... plunger pin, 410 ... return member, 412 ... movement control bar, 414 ... guide bar, 416 ... Electric wire receiving notch 418 ... fixing pin 420 ... movement control rod insertion hole 422 ... guide rod fitting insertion hole 423 ... (cam plate 40 ) ... Mounting screw, 426 ... Mounting screw insertion hole, 428 ... Movement control rod through hole, 430 ... Plunger pin insertion hole, 432 ... First engagement portion, 434 ... Second engagement portion, 436 ... Engagement part, 438 ... Fixing screw L ... Electric wire (covered wire), S ... Core wire, H ... Insulation coating CL ... Center axis (of electric wire L) B ... Operation rod, C ... Fixed operation rod

Claims (3)

A cutting blade that peels off the insulation coating of the electric wire to expose the core wire by rotating around the central axis of the electric wire,
An electric wire fixing mechanism for fixing the electric wire;
A movement control mechanism that controls movement of the cutting blade toward the electric wire fixing mechanism;
The movement control mechanism is
A rotating member that rotates with the cutting blade;
A rotating convex portion protruding from the rotating member;
A cam plate that has an engaging portion that engages with the rotating convex portion, and is rotated by the rotating convex portion;
One end is attached to the wire fixing mechanism, and the other end has a movement control rod that comes into contact with the cam plate,
The cam plate is formed with a movement control rod through-hole that comes to the position of the other end of the movement control rod when the cutting blade starts at least one rotation after the insulation coating is peeled off. . The engaging portion has a first engaging portion and a second engaging portion,
The rotating convex portion temporarily engages with the first engaging portion after starting the stripping of the insulating coating, and then the second engaging portion immediately before the cutting blade makes one rotation. Engaging
The wire stripping tool according to claim 1, further comprising a plunger that temporarily holds the cam plate in a state where the rotating convex portion is separated from the first engaging portion. The wire stripping tool according to claim 2, wherein a plunger pin insertion hole is formed in the cam plate so as to come to the position of the plunger when the rotating convex portion is separated from the first engaging portion.

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