Wire Stripper

Abstract

To provide a wire stripper capable of stripping a coating E without damaging a core wire F by a simple operation regardless of a user's skill. [Solution] A wire stripper in which two intersecting arms A, B are connected so as to be freely opened and closed via a rotating shaft C, and at least one of the arms A is provided with a shaft housing portion 60 that houses the rotating shaft C on one of the arms A so as to be freely movable in a circumferential direction centered on the contact point between the contact portions 30 or in the left-right direction of the arm, and a biasing portion 70 that biases the rotating shaft C to a predetermined position within the shaft housing portion 60. With this configuration, when the user closes (grapples) the handle 10, the depression blades 20 make a cut into the coating E, and then the depression blades 20 are separated from each other, so that the possibility of contact between the depression blades 20 and the core wire F can be reduced during the subsequent operation of pulling out the coating E.

Description

[Technical field]

[0001] The present invention relates to a wire stripper for stripping a coating from a wire such as an electric cable to expose a core wire, and more particularly to a wire stripper that can strip a coating with a simple operation without damaging the core wire. [Background technology]

[0002] A wire stripper is a tool that has a pair of arms that are connected so that they can be opened and closed freely, each of which is provided with multiple cutting blades (hereinafter referred to as "depression blades") consisting of approximately semicircular depressions that correspond to the size of the wire.The depression blades clamp the wire and cut the coating, which is then pulled out in the axial direction of the wire, to expose the core wire (Patent Document 1).

[0003] The conventional wire stripper shown in Fig. 8 has a recessed blade b formed so as to be a nearly perfect circle when viewed from the right and left perpendicular directions. When using this wire stripper to strip the coating c1 of a wire c to expose the core wire c2, if the coating c1 is pulled out in the right and left perpendicular direction of the wire stripper, the coating c1 can be pulled out without the recessed blade coming into contact with the core wire c2. In reality, however, the blades of the wire stripper are staggered rather than butted together, so the wire c held by the wire stripper may tilt, and the wire may be pulled out in a direction tilted relative to the left and right. When attempting to pull out the coating portion c1 in a direction inclined relative to the left-right direction of the wire stripper, the distance between the recessed blades b when viewed from this pulling direction becomes narrower than the distance between the recessed blades b when viewed from the left-right direction of the wire stripper, resulting in a problem that the recessed blades b come into contact with the core wire c2 passing through while pulling out the coating portion c1, damaging the core wire c2.

[0004] As a way to avoid this problem, the video (2:00-3:00) shown in Non-Patent Document 1 introduces a method in which the user grips the handle to clamp the wire, then loosens their grip on the handle slightly to move the recessed blades slightly apart before pulling out the coating, thereby avoiding damage to the core wire. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2019-92249 A [Non-patent literature]

[0006] [Non-Patent Document 1] https: / / www.youtube.com / watch?v=Qmh3hsJoz24 "How to strip AWG wire / tips and tricks" Summary of the Invention [Problem to be solved by the invention]

[0007] However, the method of use introduced in Non-Patent Document 1 had problems such as the need to change the degree to which the handle was loosened depending on the size of the wire, and the need to keep the handle loosened while pulling out the coating, which required skill on the part of the user.

[0008] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide a wire stripper that is capable of stripping a coating without damaging a core wire by simple actions and without depending on the user's level of skill. [Means for solving the problem]

[0009] The wire stripper of the present invention is a wire stripper having two intersecting arms connected via a pivot shaft so that they can be opened and closed freely, and each arm is provided with at least a handle provided on the rear end of the arm closer to the pivot shaft, a recessed blade provided on the tip end of the arm closer to the pivot shaft, and a contact portion provided on the tip end of the arm closer to the recessed blade and which can come into contact with each other by closing the handle, and at least one of the arms is further provided with a shaft accommodating portion that accommodates the pivot shaft on the one arm so that it can be moved freely in a circumferential direction around the contact point between the contact portions or in the left-right direction of the arm, and a biasing portion that directly or indirectly biases the pivot shaft to a predetermined position within the shaft accommodating portion.

[0010] With this configuration, when the user closes the handle (gripping the handle), the depression blades form an incision in the coating, and then the depression blades are slightly separated from each other, thereby reducing the possibility of contact between the depression blades and the core wire when subsequently pulling out the coating. Effect of the Invention

[0011] According to the wire stripper of the present invention, the user does not need to be highly skilled and can simply remove the coating without damaging the core wire. [Brief description of the drawings]

[0012] [Figure 1] 1 is an overall schematic view of a wire stripper according to a first embodiment. [Diagram 2] FIG. [Diagram 3] 11 is a schematic diagram showing the transition of the movement of the recessed blade as the movement of gripping the handle progresses. [Figure 4] FIG. 11 is a partial schematic view showing an indirect biasing example (1) of the wire stripper according to the second embodiment. [Diagram 5] FIG. 11 is a partial schematic view showing an indirect biasing example (2) of the wire stripper according to the second embodiment. [Figure 6]FIG. 11 is a partial schematic view of a wire stripper according to a third embodiment. [Figure 7] FIG. 11 is a partial schematic view of a wire stripper according to a fourth embodiment. [Figure 8] A schematic diagram showing how a conventional wire stripper is used. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, embodiments of the present invention will be described with reference to the drawings. EXAMPLES

[0014] <1> Overall configuration (Fig. 1) FIG. 1 shows a first embodiment of a wire stripper according to the present invention. The wire stripper according to the present invention has a structure in which two intersecting arms (one arm A and the other arm B) are connected via a rotation shaft C so as to be able to open and close freely. In the present invention, the up-down direction on the paper in FIG. 1 is defined as the front-rear direction of the arm, the left-right direction on the paper as the up-down direction of the arm, and the front-rear direction on the paper (axial direction of rotation axis C) as the left-right direction of the arm. In the present invention, the shape of each arm is not particularly limited, and any known shape (straight line, curved line, etc.) used in wire strippers can be used.

[0015] <2> Configuration of each arm In this embodiment, the upper side of the paper in FIG. 1 is defined as the tip side of the arm, and the lower side of the paper is defined as the rear end side of the arm. Each arm has at least a handle 10 , a depression blade 20 and a contact portion 30 . The handle 10 is provided on the rear end side of the arm relative to the rotation axis C. The depression blade 20 and the contact portion 30 are provided on the tip side of the arm relative to the rotation axis C.

[0016] <3> Handle (Fig. 1) The handle 10 is a portion that is held by a user of the wire stripper. The handle 10 is also called a grip, a holding portion, or a handle. In the present invention, the shape of the handle 10 is not particularly limited. By grasping both handles 10 and closing them, the user can bring the contact portions 30 and depression blades 20 provided at the tip of each arm closer to each other, thereby performing operations such as gripping or cutting an object.

[0017] <4> Depressed blade (Fig. 1) The depression blade 20 is a portion for making a cut in the coating portion provided on the outer periphery of the wire. The depression blade 20 is also called a strip blade or a hole blade. A plurality of depression blades 20 may be provided according to the standard width of the corresponding wire material. In the present invention, the shape of the recessed portion of the recessed blade 20 is not particularly limited, and can be appropriately designed to be approximately semicircular, rectangular, or the like, depending on the outer shape of the wire material.

[0018] <5> Contact part (Fig. 1) The contact portion 30 is a portion on one arm A that functions as a fulcrum when the rotation axis C is moved. The contact portion 30 is provided on the tip side of the arm further than the depression blade 20 . In the present invention, the shape of the contact portion 30 is not particularly limited. In the present invention, a jaw portion (holding portion) provided on each arm for holding an object may also serve as the contact portion 30.

[0019] <6> Other areas (Figure 1) In addition, each arm may be provided with a straight blade 50 for cutting the wire, a guide groove 40 for guiding the positioning of the wire on each depression blade 20, and the like.

[0020] <7> Conversion mechanism (Fig. 1, Fig. 2) The wire stripper according to the present invention is provided with a mechanism (conversion mechanism) that causes the depression blades 20 provided on each arm to approach each other and then move away from each other as the closing operation of both arms progresses. One example of this conversion mechanism is a mechanism (rotation axis moving mechanism) that moves the rotation axis C around the contact point of the contact portion 30 provided on each arm as a fulcrum. In this embodiment, as an example of the rotation shaft moving mechanism, a structure is adopted in which at least one arm A is provided with a shaft receiving portion 60 and a biasing portion 70. The details of each part will be explained below.

[0021] <7.1> Shaft housing (Fig. 2) The shaft accommodating portion 60 is a portion for accommodating the rotation shaft C so as to be movable in the circumferential direction around the contact point between the contact portions 30 . In the present invention, the shape of the shaft accommodating portion 60 is not particularly limited, and may be, for example, an arc shape whose width is the diameter of the pivot shaft C, or a shape whose width is the diameter of the pivot shaft C and which widens in a direction perpendicular to the left-right direction of the arm. In this embodiment, the shaft accommodating portion 60 is configured as an elongated hole having a width equal to the outer diameter of the rotation shaft C and extending in the circumferential direction centered on the contact point between the contact portions 30 .

[0022] <7.2> Pressurizing part (Fig. 2) The biasing portion 70 is a portion for biasing the rotation shaft C housed in the shaft housing portion 60 to a predetermined position within the shaft housing portion 60 . In the present invention, the biasing portion 70 may be of a type that directly biases the rotation axis C by contacting the rotation axis C, or may be of a type that does not directly contact the rotation axis C but indirectly biases the rotation axis C via another member. In the present invention, the biasing portion 70 can be made of an elastic member such as a spring or rubber. In this embodiment (FIG. 2), the biasing portion 70 is made of a spring. This spring is accommodated in a slot 71 formed to communicate with the shaft housing portion 60, and one end of the spring is kept in contact with the rotating shaft C in a compressed state, whereby the spring directly biases the rotating shaft C to a predetermined position within the shaft housing portion 60 by the restoring force of the spring. The biasing force of the biasing portion 70 may be designed within a range in which the rotation axis C does not move due to resistance when the arms are closed and the depression blade 20 makes a cut in the coating of the wire.

[0023] <8> Operation image (Figure 3) Next, an operation image of the wire stripper according to this embodiment will be described.

[0024] (1) Handle open (Fig. 3(a)) 3(a) shows the positions of the depression blade 20 and the contact portion 30 when the handle 10 is open. At this time, the rotation axis C is held at a predetermined position by the biasing force of the biasing portion 70.

[0025] (2) The handle is gripped and the concave blade is brought closer (Fig. 3(b)). Figure 3(b) shows the state in which the wire D is set in the guide groove 40 that connects to the appropriate depression blade 20 according to the diameter of the wire D, and then the handle 10 is gripped and the arm is closed, causing the depression blade 20 to make an incision E1 in the coating E. At this time, the contact portions 30 of the arms are in contact with each other, and the depression blades 20 of the arms are closest to each other. The rotation shaft C continues to remain in the predetermined position due to the biasing force of the biasing portion 70.

[0026] (3) The handle is further gripped to separate the concave blade (Fig. 3(c)). FIG. 3(c) shows a state in which the handle 10 is further gripped after the contact portions 30 of the arms are in contact with each other. When the handle 10 is gripped further from the state shown in FIG. 3(b), a force acts on the rotation axis C housed in the axis housing 60, with the contact point between the two contact portions 30 as a fulcrum, resisting the biasing force of the biasing portion 70 which biases the rotation axis C to a predetermined position. As a result, the pivot axis C moves from its designated position within the shaft accommodating portion 60, and one arm A and the other arm B open slightly at an angle θ with the contact point of the contact portion 30 as the fulcrum, and as a result, both recessed blades 20 also become slightly separated.

[0027] (4) Removal of the coating (not shown) By moving the wire stripper in the longitudinal direction of the wire D while keeping the wire in the position shown in Figure 3(c) (with the handle 10 gripped), the coating E can be removed from the wire D, exposing the internal core wire F. At this time, since each depression blade 20 remains slightly separated, even if the direction in which the covering portion E is pulled out is tilted relative to the left-right direction of the arm, the possibility of contact between the depression blade 20 and the core wire F can be reduced.

[0028] <9> summary As described above, in the wire stripper of the present invention, the action of closing the pair of arms A, B, i.e., the user gripping the handle 10, causes the depression blades 20 to be slightly separated from each other after making an incision in the coating E with the depression blades 20, thereby reducing the possibility of contact between the depression blades 20 and the core wire F during the subsequent operation of pulling out the coating E. Therefore, as in the method of using a conventional wire stripper, it is no longer necessary for the user to grip the handle 10 to pinch the wire D, and then to loosen his grip on the handle 10 slightly and maintain that position while performing the work of pulling out the coating E. As a result, the user can peel off the coating E without damaging the core wire F through simple operations regardless of the user's skill. EXAMPLES

[0029] <1> Indirect biasing by biasing part (Fig. 4, Fig. 5) In the wire stripper according to the present invention, the biasing portion 70 may be configured not to be in direct contact with the rotating shaft C, but to indirectly bias the rotating shaft C via another member. Hereinafter, a configuration example in which the rotation shaft C is indirectly biased will be described with reference to FIGS.

[0030] <2> Indirect actuation example (1) (Fig. 4) In the example shown in FIG. 4, the biasing portion 70 is made of an elastic member disposed near the rotation axis C so as to bias one arm A and the other arm B in an open state. According to this configuration, the rotation axis C can be held at a predetermined position by the biasing force of the biasing portion 70 until both arms A and B transition from the open state to the closed state.

[0031] <3> Indirect energization example (2) (Fig. 5) 5, the biasing unit 70 is configured with an elastic member arranged to connect the handle 10A provided on one arm A and the handle 10B provided on the other arm B. With this configuration as well, the rotation axis C can be held in a predetermined position by the biasing force of the biasing unit 70 until both arms A and B transition from the open state to the closed state.

[0032] <4> The biasing part and the handle biasing part are used together In this embodiment, the biasing portion 70 may also function as a handle biasing portion 80, which will be described in a third embodiment later. EXAMPLES

[0033] <1> Addition of a handle biasing part (Fig. 6) In the wire stripper according to the present invention, a handle biasing section 80 may be provided in addition to the biasing section 70, which biases one arm A and the other arm B in an open state. In this embodiment, the handle biasing portion 80 is configured with an elastic member arranged to connect the handle 10A provided on one arm A and the handle 10B provided on the other arm B. With this configuration, the closed handle 10 naturally returns to the open position during operations such as removing the coating or cutting the wire, improving convenience for the user.

[0034] <2> Regarding the design of the biasing force in the biasing part and the handle biasing part In the case where the biasing portion 70 and the handle biasing portion 80 are provided separately as in this embodiment, when attempting to separate the recessed blade 20 from a state in which each arm is closed and the contact portions 30 are in contact with each other, it is necessary to grip the handle 10 so as to resist the combined force of the biasing force from the handle biasing portion 80 and the biasing force from the biasing portion 70. Therefore, it is preferable to appropriately design the biasing forces of the biasing portion 70 and the handle biasing portion 80 with the combined force of these biasing forces as a reference, taking into consideration the grip strength of the user. EXAMPLES

[0035] <1> Addition of biasing force adjustment section (Fig. 7) The wire stripper according to the present invention may be provided with a biasing force adjustment portion 90 that can adjust the biasing force of the biasing portion 70. In this embodiment, for one arm A of the configuration according to Example 1, a biasing force adjustment section 90 is formed by a screw hole 91 formed so as to communicate with the inside of the groove hole 71 that houses the biasing section 70, and a bolt 92 that can be screwed into this screw hole 91. By changing the tip position of the bolt 92 by the amount of screwing of the bolt 92, the end of the biasing portion 70 opposite the end that contacts the pivot axis C can be pressed by the tip of the bolt 92, thereby adjusting the biasing force of the biasing portion 70. According to this configuration, the grip strength required to further grip the handle 10 and slightly release the recessed blade 20 after the recessed blade 20 has formed an incision in the covering portion E can be adjusted according to the user's grip strength. [Explanation of symbols]

[0036] A: One arm B: The other arm C: Rotation axis D: Wire rod E: Covering part F: Core wire 10: Handle 20: Concave blade 30: Contact part 40: Guide groove 50: Straight blade 60: Shaft housing 70: Pressurizing section 71: Groove 80: Handle biasing part 90: Force adjustment section 91: Screw hole 92: Bolt a: Arm b: Concave blade c:Wire rod c1: Covering part c2: Core wire

Claims

1. A wire stripper having two intersecting arms connected via a pivot shaft so as to be able to open and close freely, Each arm has: A handle is provided on the rear end side of the arm relative to the pivot shaft. A recessed blade is provided on the tip side of the arm relative to the pivot shaft; a contact portion provided on the tip side of the arm relative to the recessed blade and capable of coming into contact with each other by a closing operation of the handle; At least one arm has a shaft housing portion that houses the rotation shaft on the one arm so as to be movable in a circumferential direction about a contact point between the contact portions or in a left-right direction of the arm; and a biasing portion that directly or indirectly biases the rotating shaft to a predetermined position in the shaft accommodating portion. Wire stripper.

2. The biasing portion further biases the handle to an open state.

2. The wire stripper of claim 1.

3. The device further includes a biasing force adjustment unit capable of adjusting the biasing force of the biasing unit.

2. The wire stripper of claim 1.

4. The handle biasing portion further biases the handle to an open state.

2. The wire stripper of claim 1.

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