JPH0716520U - Wire sheath stripping tool - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an electric wire coating stripping tool capable of easily and surely stripping a multilayer electric wire coating portion. An opening 16 is provided on a side surface of a cylindrical electric wire guide 10 that is connected to a rotary shaft of a rotary electric tool and rotates integrally with the rotary shaft, and has an opening at an end. The opening 16 is inserted into the guide 10. Predetermined cutting angle θ for the electric wire 40
And the electric wire coating stripping tool to which the cutting blade 20 having the cutting depth d is fixed, a plurality of cutting blades having the cutting depths d ₁ and d ₂ corresponding to the respective coating layers 43 and 44 forming the coating portion 42. The cutting blade 20 is composed of 20A and 20B.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric wire coating stripping tool that spirally cuts and strips a coating portion of an electric wire made of a material such as synthetic resin, and more particularly to an electric wire coating stripping tool that is effective for stripping a coating portion having a multilayer structure.

[0002]

[Prior art]

 As a conventional wire coating stripping tool of this type, there is Japanese Utility Model Laid-Open No. 1423291/1990 proposed by the same applicant. As shown in FIGS. 8 and 9, an opening 2 is provided on a side surface of a cylindrical electric wire guide 1 that can be connected to a rotary shaft of a handball (rotary power tool), and a cutting blade 3 is provided in the opening 2. With the fixed structure, with respect to the electric wire 5 inserted into the electric wire guide 1, the guide blade 1 and the cutting blade 3 rotate integrally, so that the cutting blade 3 cuts the covering portion 5b covering the conductive portion 5a, and the opening is formed. The structure is such that the cut lathe 5c is led out of the guide from the portion 2.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional tool, although it can be said that it is very effective when the covering portion 5b is a single layer, there are cases where the covering portion has a so-called multi-layer structure composed of two or three layers. To remove the coating part of the tool, prepare a plurality of tools with the cutting depth of the cutting blade adjusted for each coating layer to be removed, replace the tools in sequence, and remove them sequentially from the outer coating layer. There was a problem that it was very inconvenient because it required work.

The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide an electric wire coating stripping tool capable of easily and surely stripping a multilayered electric wire coating portion. .

[0005]

Means for Solving the Problems In order to achieve the above object, in an electric wire coating stripping tool according to a first aspect, a tip of a tip that is connected to a rotary shaft of a rotating electric tool and rotates integrally with the rotary shaft. An opening is provided on the side surface of the open tubular wire guide, and a wire cutting strip with a cutting edge with a specified cutting angle and cutting depth is fixed to this opening for the wire to be inserted into the guide. In the tool, the cutting blade is constituted by a plurality of cutting blades having a cutting depth corresponding to each coating layer constituting the coating portion.

In the electric wire coating stripping tool according to a second aspect of the present invention, an opening is provided on a side surface of a cylindrical electric wire guide which is connected to the rotary shaft of the rotary electric tool and rotates integrally with the rotary shaft. In the wire coating stripping tool, in which a cutting blade with a predetermined cutting angle and cutting depth is fixed to the wire inserted into the guide in this opening, the cutting edge of the cutting blade is It is formed in a step-like shape with a cutting depth corresponding to each coating layer.

[0007]

[Action]

 The cutting blade rotates around the axis of the electric wire guide together with the cylindrical electric wire guide, whereby the blade tip cuts the covering part for the electric wire inserted into the cylindrical electric wire guide. The cut wire coating is stripped from the wire conductive part and led out to the outside through the side opening of the wire guide. In particular, a plurality of cutting blades (corresponding to claim 2, the cutting edges corresponding to the coating layers forming the coating portion) corresponding to the coating layers forming the coating portion sequentially peel off the coating layers.

[0008]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view of an electric wire coating stripping tool according to an embodiment of the present invention, FIG. 2 is a plan view of the tool, FIG. 3 is a side view of the tool, and FIG. 4 is a longitudinal sectional view of the tool (FIG. 2 is a cross-sectional view taken along line IV-IV shown in FIG. 2), FIG. 5 is a perspective view of the periphery of the cutting blade, which is the main part of the present invention, and FIG. 6 is a cross-sectional view showing how the cutting blade peels off the covering portion.

In these drawings, the electric wire coating stripping tool is composed of a tubular electric wire guide 10 and a cutting blade 20 fixed to the guide 10. The tubular electric wire guide 10 has a cylindrical shape with an open end 12 and has an inner diameter portion 14 that matches the outer shape of the electric wire 40. At the rear end of the guide 10, there is formed a shaft portion 11 that is bite-coupled to a chuck of a rotary electric tool such as a handball, and the tubular electric wire guide 10 is integrated with the rotation shaft of the handball at a predetermined speed. It is designed to rotate in the direction of the rotation arrow.

A rectangular opening 16 extending in the circumferential direction is formed on the side surface of the tubular wire guide 10. A block-shaped cutting portion holding portion 18 for mounting the cutting blade 20 is formed on a side edge portion of the rectangular opening 16 opposite to the guide rotation direction. The cutting portion holding portion 18 is integrated with the tubular electric wire guide 10 by an appropriate means such as welding or cutting. The cutting blade holding portion 18 is provided with two cutting blade mounting surfaces 19a and 19b extending in a substantially tangential direction on the inner peripheral surface of the tubular electric wire guide 10, and the mounting surface 19a is provided with a cutting blade inner surface for cutting the inner layer portion. A first cutting blade 20A and a second cutting blade 20B for cutting the outer layer of the covering portion are fixed to the mounting surface 19b by a screw 19, and the respective cutting edges 21A and 21B of the cutting blades 20A and 20B have predetermined cutting angles. And the cutting depth is set. That is, as shown in FIG. 6, the covered portion 42 around the conductive portion 41 of the electric wire 40 is composed of an inner layer portion 43 and an outer layer portion 44, and the cutting edges 21A, 21B of the cutting blades 20A, 20B. Respectively protrude inside the guide 10, the blade edge 21A of the first blade 20A is in the tangential direction of the boundary line between the inner and outer layer portions 43, 44 of the coating portion, and the blade edge 21B of the second blade 20B is the conductive portion 41. The cutting depths of the cutting edges 21A and 21B are set to d ₁ and d ₂ , and the cutting angles of the cutting edges 21A and 21 B are set to θ, respectively, extending in the tangential direction of the boundary line with the inner layer portion 43.

Further, reference numeral 14 a is a step portion provided around the inner diameter portion 14, and the step portion 14 a has an important effect of setting a cutting pitch P of the covering portion 42 (in particular, the inner layer portion 43). That is, in the cutting blade 20B, the cutting edge 21B is arranged so as to straddle the step portion 14, and the inner layer portion 43 exposed by the outer edge portion 44 being stripped off by the cutting edge 21A of the cutting blade 20A is the inner layer portion 43. Cutting starts from the position where the tip of the inner edge of the cutting blade 20B hits the blade edge 21B of the cutting blade 20B, but the tip of the inner layer portion 43 abuts on the stepped portion 14a, which prevents the electric wire 40 from entering (the guide 10 entering), and The cutting pitch (cutting margin) P of the inner layer portion 43 by 21B is determined. The cutting pitch P can be adjusted by changing the pushing force of the guide 10. That is, when the covering portion 42 (inner layer portion 43) is thin and the cutting resistance is relatively small, the guide 10 is strongly pressed against the electric wire 40 to increase the cutting pitch and speed up the covering portion. When the covering portion 42 (inner layer portion 43) is thick and the cutting resistance is large, the pushing force of the guide 10 against the electric wire 40 is reduced to reduce the cutting pitch, so that the handball can be removed. You can avoid burdening yourself.

As described above, since the cutting edges 21A and 21B have the cutting depths d ₁ and d ₂ and the predetermined cutting angle θ suitable for cutting the outer layer portion 44 and the inner layer portion 43 of the covering portion, The cutting blades 20A and 20B each spirally cut the covering portion 42 (44, 43) by rotation of 10 (cutting blades 20A and 20B), and the cut covering portion 42 (44, 43) is shown in FIG. As described above, the opening 16 is led out of the guide 10. The reference numeral 50 indicates turning of the stripped electric wire coating portion. Reference numeral 15 is a marking line display for indicating an appropriate length of the conductive portion 41 exposed by stripping off the covering portion 42. The marking line display 15 is used to indicate the length of the exposed conductive portion 41. By comparing, it can be confirmed whether or not the strip has been stripped to the proper length.

The method of using this electric wire coating stripping tool is as follows. That is, one person holds the handball to which the guide 10 is connected, and the other person holds the covered electric wire 40 firmly. Next, the handball is driven to rotate the guide 10, and the tubular electric wire guide 10 is inserted from the end of the electric wire 40. When the tip of the electric wire 40 reaches the position shown by reference numeral P ₁ in FIG. 4, the first cutting blade 20A spirally cuts the outer layer portion 44 of the wire coating, and the outer layer portion 44 cut in the spiral shape is formed into a crushed shape. Peel it off and lead it out of the guide 10 through the opening 16. Since the cutting pitch P is determined by the tip of the inner layer portion 43 hitting the stepped portion 14a, even if the guide 10 is pressed too strongly against the electric wire 40, the cutting angle θ does not become extremely large. When the outer layer portion 44 is stripped off by a predetermined length (the tip of the electric wire 40 is at the position shown by P ₂ in FIG. 4), the second cutting blade 20B starts cutting the inner layer portion 43. The debris cut by the cutting blade 20B is also spiraled and led out from the opening 16 to the outside. Such wire 40 and the guide 10 and the relative traveling in the axial direction, an innermost edge 13 abuts the (tip of the conductive portion of the wire 40 in FIG. 4 code P ₃ of the tip tubular wire guide 10 of the wire 40 When the position shown in (1) is reached), it does not move further in the axial direction. Therefore, since the wire coating is not stripped any more, the coating portion is always stripped by the length corresponding to the depth of the inner diameter of the tubular wire guide 10. FIG. 6 is a view showing that the cutting blade 20 (20A, 20B) is peeling off the wire covering portion 42 (44, 43) from the wire conducting portion 41. The peeled wire covering portion 42 (44 , 43) are sent out from the opening 16 in the form of a spiral spring as shown by reference numeral 50.

It should be noted that, in the above-described embodiment, the wire covering portion stripping work is described to be performed by two persons, but the work can be performed by one person. That is, the end of the electric wire may be fixed by stepping on the electric wire with a foot, and the guide 10 may be inserted from the end of the electric wire with a handball in this state. FIG. 7 is a side view of a coating stripping tool according to another embodiment of the present invention.

In the above-described embodiment, the cutting blades 20A and 20B for cutting the inner layer portion 43 and the outer layer portion 44 of the covering portion 42 are provided adjacent to each other, but in this embodiment, one cutting blade is provided. The cutting blade 20 (20C) is formed by continuously forming the cutting edges 21B and 21A suitable for cutting the inner and outer layer portions 43 and 44 of the covering portion in a stepwise manner, and has the advantage that only one cutting blade is required. is there.

In the above-mentioned two embodiments, two cutting blades are provided or two cutting edges are provided. However, when the coating portion is composed of three layers or more, the cutting blade (blade edge) is covered with the coating portion. You may make it provide three or more (three places) corresponding to each layer of.

[0017]

[Effect of device]

 As is clear from the above description, anyone can easily and accurately strip an electric wire coating portion of a multilayer structure by the electric wire coating stripping tool according to the present invention.

[Brief description of drawings]

FIG. 1 is a perspective view of an electric wire stripping tool according to an embodiment of the present invention.

[Figure 2] Plan view of the tool

[Figure 3] Side view of the tool

FIG. 4 is a vertical sectional view of the tool (a sectional view taken along line IV-IV shown in FIG. 3).

[Fig. 5] Perspective view around the cutting blade

FIG. 6 is a cross-sectional view for explaining how the cutting blade strips off the covering portion.

FIG. 7 is a side view of an electric wire stripping tool according to another embodiment of the present invention.

FIG. 8 is an exploded perspective view of a conventional wire stripping tool

FIG. 9 is an explanatory view of a usage state of the tool

[Explanation of symbols]

 10 Cylindrical Electric Wire Guide 12 Tip of Cylindrical Electric Wire Guide 14a Stepped portion for setting cutting allowance (cutting pitch) of coating 16 Opening 20 (20A, 20B, 20C) Cutting blade 21A, 21B Cutting edge 40 Electric wire 41 Conductive portion 42 wire coating part 43 coating inner layer part 44 coating outer layer part

Claims (2)

[Scope of utility model registration request] 1. An opening portion is provided on a side surface of a cylindrical electric wire guide having an opening at a tip end that is connected to a rotation shaft of a rotary electric tool and rotates integrally with the rotation shaft, and the opening portion is inserted into the guide. In an electric wire coating stripping tool in which a cutting blade having a predetermined cutting angle and cutting depth with respect to an electric wire is fixed, the cutting blade has a plurality of cutting depths corresponding to each coating layer forming a coating portion. An electric wire coating stripping tool comprising a cutting blade. 2. An opening is provided on a side surface of a tubular electric wire guide having an opening at an end which is connected to a rotating shaft of a rotary electric tool and rotates integrally with the rotating shaft, and the opening is inserted into the guide. In an electric wire coating stripping tool in which a cutting blade having a predetermined cutting angle and cutting depth with respect to an electric wire is fixed, the cutting blade has a cutting edge having a cutting depth corresponding to each coating layer constituting the coating portion. An electric wire coating stripping tool characterized by being formed in a stepped shape.