Wire stripper

Abstract

To provide a wire stripper capable of peeling a coating part E without damaging a core wire F by a simple operation regardless of user's skill.SOLUTION: A wire stripper openably / closably connecting two crossing arms A and B through a rotation shaft C has a shaft housing part 60 housing in at least one arm A the rotation shaft C movably in a circumferential direction around a center of a contact position of contact parts 30 on one arm A or in left / right direction of the arm, and an energization part 70 energizing the rotation shaft C in a predetermined position within the shaft housing part 60. Since recessed edges 20 become in a separate state after a user forms cutting to a coating part E by the recessed edges 20 by a closing operation (grasping operation) of a handle 10, a possibility of contact between the recessed edges 20 and a core wire F can be reduced by a pull-out operation of the coating part E thereafter.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a wire stripper for peeling a covering portion from a wire such as an electric wire cable to expose a core wire, and more particularly to a wire stripper capable of peeling the covering portion without damaging the core wire with a simple operation.

Background Art

[0002] A wire stripper is provided with a plurality of cutting blades (hereinafter referred to as "depressed blades") each having a substantially semi-circular depression corresponding to the size of a wire on each of a pair of arms that are connected so as to be openable and closable. By sandwiching the wire with these depressed blades and making a cut, the covered portion is pulled out in the axial direction of the wire to be peeled, thereby exposing the core wire (Patent Document 1).

[0003] In the conventional wire stripper shown in FIG. 8, the depressed blade b is formed so as to be substantially circular when viewed from the left and right perpendicular directions. When trying to peel the covering portion c1 of the wire c and expose the core wire c2 using this wire stripper, if the covering portion c1 is pulled out in the left and right perpendicular directions of the wire stripper, the covering portion c1 can be pulled out without the depressed blade contacting the core wire c2. However, in reality, since the blades of the wire stripper are not butted against each other but are staggered, the wire c sandwiched by the wire stripper may tilt, and pulling may be performed in a direction tilted with respect to the left and right directions. When trying to pull out the covering portion c1 in a direction tilted with respect to the left and right directions of the wire stripper, the distance between the depressed blades b when viewed from this pulling direction becomes narrower than the distance between the depressed blades b when viewed from the left and right directions of the wire stripper. Therefore, there has been a problem that the depressed blade b contacts the core wire c2 passing through during the pulling out of the covering portion c1, damaging the core wire c2.

[0004] As a method to avoid this problem, in the video shown in Non-Patent Document 1 (2:00 - 3:00), after the user holds the handle and sandwiches the wire, the handle grip is slightly loosened to slightly separate the concave blades, and then the covering part is pulled out to avoid damaging the core wire.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Non-Patent Documents

[0006]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] However, in the usage method introduced in this Non-Patent Document 1, it is necessary to change the degree of loosening the handle according to the size of the wire, and it is also necessary to perform the operation of pulling out the covering part while maintaining the state of loosening the handle. Therefore, there are problems such as the need for user proficiency.

[0008] Therefore, an object of the present invention is to provide a wire stripper that can peel the covering part without damaging the core wire with a simple operation regardless of the user's proficiency.

Means for Solving the Problems

[0009] The wire stripper according to the present invention is a wire stripper in which two intersecting arms are connected via a rotation axis so as to be openable and closable, and each arm is provided with a handle provided on the rear end side of the arm with respect to the rotation axis, a recessed blade provided on the tip end side of the arm with respect to the rotation axis, and a contact portion provided on the tip end side of the arm with respect to the recessed blade and capable of contacting each other by the closing operation of the handle. At least one arm is further provided with a shaft accommodating portion that accommodates the rotation axis movably in the circumferential direction around the contact portion between the contact portions or in the left-right direction of the arm on the one arm, and a biasing portion that biases the rotation axis directly or indirectly to a predetermined position within the shaft accommodating portion.

[0010] With such a configuration, when the user closes the handle (a squeezing operation), after a cut is formed in the covering portion by the recessed blade, the recessed blades are slightly separated from each other. Therefore, in the subsequent operation of pulling out the covering portion, the possibility of contact between the recessed blade and the core wire can be reduced.

Advantages of the Invention

[0011] According to the wire stripper of the present invention, the covering portion can be peeled off without damaging the core wire with a simple operation regardless of the skill of the user.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

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

Embodiment

[0014] <1>Overall configuration (FIG. 1) FIG. 1 shows a first embodiment of the 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 axis C so as to be openable and closable. In the present invention, the vertical direction on the paper surface in FIG. 1 is defined as the front-rear direction of the arm, the left-right direction on the paper surface is defined as the up-down direction of the arm, and the front-rear direction of the paper surface (the axial direction of the rotation axis C) is defined as the left-right direction of the arm. In the present invention, the shape of each arm is not particularly limited, and a known shape (such as a linear shape or a curved shape) adopted as a wire stripper can be adopted.

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

[0016] <3>Handle (FIG. 1) The handle 10 is a part for the user to grip when using the wire stripper. The handle 10 is also called a grip, a holding part, or a shank. In the present invention, the shape of the handle 10 is not particularly limited. By performing an operation of gripping and closing both handles 10, the user can bring the contact portions 30 and the recessed blades 20 provided on the tip sides of the respective arms closer to each other, and perform an operation of gripping or cutting an object.

[0017] <4>Recessed Blade (Fig. 1) The recessed blade 20 is a part for making a cut in the covering provided on the outer periphery of the wire. The recessed blade 20 is also called a strip blade or a hole blade. A plurality of recessed blades 20 can be provided according to the standard width of the corresponding wire. In the present invention, the shape of the recessed portion of the recessed blade 20 is not particularly limited, and can be appropriately designed as a substantially semicircular shape, a rectangular shape, etc. according to the outer shape of the wire.

[0018] <5>Contact Portion (Fig. 1) The contact portion 30 is a part for functioning with the contact point of the contact portions 30 of both arms as a fulcrum when moving the rotation shaft C on one arm A. The contact portion 30 is provided on the tip side of the arm further than the recessed blade 20. In the present invention, the shape of the contact portion 30 is not particularly limited. In the present invention, the jaw portion (holding portion) provided on each arm for sandwiching an object may be used also as the contact portion 30.

[0019] <6>Other Parts (Fig. 1) In addition, a straight blade 50 for cutting the wire, a guide groove 40 for guiding the positioning of the wire to the respective recessed blades 20, etc. may be provided on each arm.

[0020] <7>Conversion Mechanism (Figs. 1 and 2) In the wire stripper according to the present invention, as the closing operation of both arms progresses, a mechanism (conversion mechanism) is provided such that after the recessed blades 20 provided on each arm approach each other, they turn to be separated from each other. As an example of this conversion mechanism, a mechanism (rotating shaft moving mechanism) for moving the rotating shaft C with the contact point of the contact portions 30 provided on each arm as a fulcrum can be considered. In this embodiment, as an example of this rotating shaft moving mechanism, at least one arm A is provided with a shaft accommodating portion 60 and a biasing portion 70. Hereinafter, details of each part will be described.

[0021] <7.1> Shaft accommodating portion (FIG. 2) The shaft accommodating portion 60 is a part for accommodating the rotating shaft C so as to be movable in the circumferential direction centered on the contact point between the contact portions 30. In the present invention, the shape of the shaft accommodating portion 60 is not particularly limited. For example, an arc shape having the diameter of the rotating shaft C as the width length, or a shape in which the diameter of the rotating shaft C is the width length and the shape is widened in a direction orthogonal to the left - right direction of the arm can be adopted. In this embodiment, the shaft accommodating portion 60 is configured as a long hole extending in the circumferential direction centered on the contact point between the contact portions 30 with the outer diameter of the rotating shaft C as the width length.

[0022] <7.2> Biasing portion (FIG. 2) The biasing portion 70 is a part for biasing the rotating shaft C accommodated in the shaft accommodating portion 60 to a predetermined position within the shaft accommodating portion 60. In the present invention, the biasing portion 70 may be in a form of directly biasing in contact with the rotating shaft C, or may be in a form of indirectly biasing via another member without directly contacting the rotating shaft C. In the present invention, the biasing portion 70 can be constituted by an elastic member such as a spring or rubber. In this embodiment (FIG. 2), the biasing portion 70 is constituted by a spring. This spring is accommodated in a groove hole 71 formed to communicate with the shaft accommodating portion 60, and one end of the spring is brought into contact with the rotating shaft C in a compressed state of the spring, thereby directly biasing the rotating shaft C to a predetermined position within the shaft accommodating portion 60 by the restoring force of the spring. The biasing force by the biasing portion 70 may be designed within a range such that the rotation axis C does not move due to the resistance when closing each arm to make a cut in the covered portion of the wire by the recessed blade 20.

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

[0024] (1) State with the handle open (Fig. 3(a)) Fig. 3(a) shows the positions of the recessed blade 20 and the contact portion 30 in the state where the handle 10 is open. At this time, the rotation axis C remains in a predetermined position due to the biasing by the biasing portion 70.

[0025] (2) State with the handle grasped and the recessed blade approaching (Fig. 3(b)) Fig. 3(b) shows the state where, after setting the wire D in the guide groove 40 connected to the recessed blade 20 suitable for the diameter of the wire D, the handle 10 is grasped to close the arm, and a cut E1 is made in the covered portion E by the recessed blade 20. At this time, the contact portions 30 of each arm are in contact, and the recessed blades 20 of each arm are in the closest state. And the rotation axis C continues to remain in a predetermined position due to the biasing by the biasing portion 70.

[0026] (3) State with the handle further grasped and the recessed blade separated (Fig. 3(c)) Fig. 3(c) shows the state where the handle 10 is further grasped from the state where the contact portions 30 of each arm are in contact. When the handle 10 is further grasped from the state of Fig. 3(b), a force that resists the biasing force of the biasing portion 70 that biases the rotation axis C accommodated in the axis accommodating portion 60 to a predetermined position acts with the contact portion of both contact portions 30 as a fulcrum. As a result, the rotation axis C moves from a predetermined position within the shaft housing portion 60, and one arm A and the other arm B are slightly opened with an angle θ with the contact point of the contact portion 30 as a fulcrum. As a result, both the recessed blades 20 are also slightly separated from each other.

[0027] (4) Removal of the covering portion (not shown) While maintaining the state shown in Fig. 3(c) (the state in which the handle 10 is grasped), when the wire stripper is moved in the longitudinal direction of the wire D, the covering portion E can be removed from the wire D to expose the internal core wire F. At this time, since each recessed blade 20 remains slightly separated, even if the direction of pulling out the covering portion E is inclined with respect to the left - right direction of the arm, the possibility of contact between the recessed blade 20 and the core wire F can be reduced.

[0028] <9> Summary As described above, in the wire stripper according to the present invention, by the operation of closing the pair of arms A and B, that is, the operation of the user grasping the handle 10, after the formation of the cut in the covering portion E by the recessed blades 20, the recessed blades 20 are slightly separated from each other. Therefore, in the subsequent operation of pulling out the covering portion E, the possibility of contact between the recessed blade 20 and the core wire F can be reduced. Therefore, unlike the usage method of the conventional wire stripper, after the user grasps the handle 10 and sandwiches the wire D, there is no need to slightly loosen the grip of the handle 10 and maintain that state to perform the operation of pulling out the covering portion E. As a result, regardless of the user's proficiency, the covering portion E can be peeled off without damaging the core wire F with a simple operation.

Embodiment

[0029] <1> Indirect biasing by the biasing portion (Figs. 4 and 5) In the wire stripper according to the present invention, the biasing portion 70 can be configured to indirectly bias the rotation axis C via another member without directly contacting the rotation axis C. Hereinafter, with reference to FIGS. 4 and 5, a configuration example in the case of indirectly biasing the rotation axis C will be described.

[0030] <2> Indirect biasing example (1) (FIG. 4) In the example shown in FIG. 4, the biasing portion 70 is configured by an elastic member disposed in the vicinity of 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 by the biasing portion 70 until the two arms A and B transition from the open state to the closed state.

[0031] <3> Indirect biasing example (2) (FIG. 5) In the example shown in FIG. 5, the biasing portion 70 is configured by an elastic member disposed so as to connect between the handle 10A provided on one arm A and the handle 10B provided on the other arm B. Also according to this configuration, the rotation axis C can be held at a predetermined position by the biasing by the biasing portion 70 until the two arms A and B transition from the open state to the closed state.

[0032] <4> Dual use of biasing portion and handle biasing portion Note that in this embodiment, the biasing portion 70 may also function as the handle biasing portion 80 described in Example 3 below.

Example

[0033] <1> Addition of handle biasing portion (FIG. 6) In the wire stripper according to the present invention, separately from the biasing portion 70, a handle biasing portion 80 for biasing one arm A and the other arm B in an open state may be provided. In this embodiment, the handle biasing portion 80 is configured by an elastic member disposed so as to connect between the handle 10A provided on one arm A and the handle 10B provided on the other arm B. According to this configuration, in the operation of removing the covering portion, the operation of cutting the wire, etc., the closed handle 10 naturally returns to the open position, improving the convenience for the user.

[0034] <2>Biasing force design for the biasing portion and the handle biasing portion When the biasing portion 70 and the handle biasing portion 80 are provided separately as in this embodiment, when trying to separate the recessed blade 20 from the state where 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 force obtained by adding the biasing force of the handle biasing portion 80 to the biasing force of 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 reference to the force obtained by adding these biasing forces, taking into account the user's gripping force.

Embodiment

[0035] <1>Addition of a biasing force adjustment portion (Fig. 7) In the wire stripper according to the present invention, a biasing force adjustment portion 90 capable of adjusting the biasing force of the biasing portion 70 may be provided. In this embodiment, a screw hole 91 formed so as to communicate with the inside of the groove hole 71 that houses the biasing portion 70, and a bolt 92 that can be screwed into the screw hole 91 are used to constitute the biasing force adjustment portion 90 for one arm A of the configuration according to Embodiment 1. By changing the tip position of the bolt 92 by the screwing amount of the bolt 92, the end portion of the biasing portion 70 on the side opposite to the end portion in contact with the rotation shaft 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, according to the user's gripping force, after forming a cut in the covering portion E by the recessed blade 20, it is possible to adjust the gripping force required when further gripping the handle 10 and slightly separating the recessed blade 20.

Explanation of reference numerals

[0036] A: One arm B: The other arm C: Rotation shaft D: Wire E: Covering portion F: Core wire 10: Handle 20: Recessed blade 30: Contact portion 40: Guide groove 50: Straight blade 60: Shaft housing part 70: Biasing part 71: Groove hole 80: Handle biasing part 90: Biasing force adjustment part 91: Threaded hole 92: Bolt a: Arm b: Concave blade c: Wire c1: Coating 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.

Images