JP3031125B2 - Stripping method of covered wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a double-coated wire used for various electric equipment and automobile wiring, that is, a core wire coated with a first coating, and the first coating is coated with a second coating. The present invention relates to a method for peeling a double-coated wire formed by coating the above-mentioned coated body.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 14, a double-insulated wire 2 such as a high-voltage cable used for electric equipment has a first conductor 4 made of an insulating resin such as polyethylene or vinyl chloride resin on a core wire 4 such as copper. In addition, in consideration of flame retardancy and abrasion resistance, the first coating 6 is coated with an insulating resin having excellent wear resistance and the like as a second coating 8. . Further, in actual use, the double coated wire 2 thus configured is cut into an appropriate length, and the end 2
a, the first and second covering members 6, 8 are respectively stripped by a predetermined length using a peeling blade, and the core wire portion 10 is exposed from the end portion 2a in the other end direction X by the length L2. And a length L from the core 10 in the X direction.
Only 1 forms the exposed portion 12 from which the first covering 6 is exposed.

Conventionally, in order to manufacture the covered wire 2 shown in FIG. 14, a peeling treatment is performed by the following procedure using, for example, an apparatus described in Japanese Patent Application Laid-Open No. 60-204206. That is, as shown in FIG. 15, the peeling blade 14 is closed at a position (L1 + L2) in the direction X from the end 2a of the double covered wire 2 and cut into the second covered body 8. . In this state, the length measuring roller 16 is rotated to move the double coated wire 2 in the direction X by the length L1. As a result, the first coating 6 is exposed over the length L1.
The exposed part 12 is formed (FIG. 16).

[0004] Next, as shown in FIG. 17, the peeling blade 14 is further closed at that position and cut into the first covering 6. Subsequently, as described above, the length measuring roller 16 is rotated to move the double-coated wire 2 in the direction X by the length L2, so that the length (L) from the end 2a of the double-coated wire 2 is increased.
1 + L2) together with a second covering 8 of length L2.
Is simultaneously stripped off to expose the core wire 4 to form the core wire portion 10 (FIG. 18).

[0005] By such a series of operations, the end 2a
To produce a double-covered wire 2 which has been suitably skinned.

[0006]

By the way, in the above-mentioned conventional example, in order to form the exposed portion 12, the double coated wire is kept in a state where the peeling blade 14 is cut into the second coated body 8. 2 is moved, frictional resistance is generated between the tip of the peeling blade 14 and the first covering 6. Further, the first coating 6 and the second coating 8 are in close contact with each other, although weak, from the viewpoint of preventing pull-out. Therefore, due to the existence of such frictional resistance and adhesion,
When performing the above processing, the first covering 6 is stretched in the (−X) direction as the double covered wire 2 moves in the direction X. Then, in this state, when the peeling blade 14 is further closed as described above and cut into the first coating 6, the first coating 6 contracts in the X direction by the amount of extension, As a result, for example, as shown in FIG.
Decreases from the desired length L1 by the length γ,
There is a problem that the length of the core portion 10 becomes (L2 + γ).

The present invention has been made in order to solve the above-mentioned problems, and has as its object to provide a method of stripping a covered wire capable of peeling a covered body from an end portion of a double covered wire with high dimensional accuracy. And

[0008]

According to a first aspect of the present invention, there is provided a double-coated wire comprising a core covered with a first covering, and the first covering covered with a second covering. The first and second coverings are peeled off from one end by a predetermined length using a peeling blade, respectively, to form a core portion where the core wire is exposed by a length L2 from the one end toward the other end. And a method of peeling a covered wire for forming an exposed portion where the first covered body is exposed by a length L1 in the direction of the other end from the core wire portion. From the one end to the other end (L1 + L
2 + α; where α> 0), the second strip is cut with the stripping blade, and in this state, the coated wire is extended in the other end direction with respect to the stripping blade. (L1 +
L2), after the relative movement by L2), the first step of cutting the covered wire with the peeling blade, and applying the leather to the first covered body at a position having a length L2 from the cutting position toward the other end. A second step of cutting the stripping blade and moving the covered wire relative to the stripping blade at least in the direction of the other end by at least the length L2 in that state.

According to a second aspect of the present invention, the core wire is coated with a first coating, and the first coating is coated with a second coating. 1st and 2nd
The cover is peeled off by a predetermined length using a peeling blade to form a core portion in which the core wire is exposed by the length L2 in the direction from the one end to the other end, and from the core portion to the other end. A method of peeling a covered wire for forming an exposed portion where the first covered body is exposed by a length L1 in a direction,
In order to achieve the above object, the second coated body is provided with a length (L1 + L2 + α + β; α> 0, β> 0) from the one end to the other end of the coated wire. Cut the stripping blade, and in that state, extend the covered wire in the direction of the other end with respect to the stripping blade (L1 + L2).
+ Β) after the relative movement by only a first step of cutting the covered wire with the peeling blade, and the covering wire at a position of length β in the other end direction from the cutting position in the first step. A second step of cutting, and the peeling blade is cut into the first cover at a position having a length L2 in the direction of the other end from the cutting position in the second step, and A third step of moving the covered wire relative to at least the length L2 in the direction of the other end with respect to the peeling blade.

[0010]

According to the first aspect of the present invention, the peeling blade is cut into the second covering at a position of a length (L1 + L2 + α; α> 0) from one end to the other end of the covered wire. In this state, the covered wire is moved relative to the peeling blade by the length (L1 + L2) toward the other end. And
At that position, the covering wire is cut by the peeling blade. As a result, the first cover is exposed over a length (L1 + L2-γ) obtained by subtracting the contraction of the first cover (referred to as “γ” in this specification) from (L1 + L2). Subsequently, the peeling blade is cut into the first covering at a position of a length L2 from the cutting position in the direction of the other end, and in this state, the covering wire is moved with respect to the peeling blade. At least the length L2 is relatively moved in the direction of the other end, and the first cover is peeled off and the length L2
Is formed, and an exposed portion having a length L1 remains.

According to the second aspect of the present invention, the length (L1 + L2 + α + β; α1
> 0, β> 0), a stripping blade is cut into the second covering body, and in this state, the covering wire is extended (L1 + L2 + β) in the direction of the other end with respect to the peeling blade. ), And the covered wire is cut by the peeling blade. Thereafter, the covered wire is cut from the cut position at a position of a length β in the direction of the other end. As a result, the first coating is exposed over the length (L1 + L2). Subsequently, the peeling blade is cut into the first covering at a position of a length L2 from the cutting position in the direction of the other end, and in this state, the covering wire is moved with respect to the peeling blade. The first covering body is peeled off at least by a length L2 in the other end direction to form a core portion having a length L2, and an exposed portion having a length L1 remains.

[0012]

Next, a first embodiment will be described with reference to FIGS. 1 to 6, and a second embodiment will be described with reference to FIGS. 7 to 13. FIG.

The method of stripping a covered wire according to the present invention can be applied to any of the conventionally known apparatuses for stripping a covered wire. In the following, a double covered wire can be reciprocated in the longitudinal direction X. FIG. 2 shows a simple length measuring roller and two peeling blades that can be opened and closed in a direction substantially perpendicular to the direction X, and the operation thereof and the method of peeling the covered wire according to the embodiment will be described in detail.

A. First Embodiment FIGS. 1 to 6 are views showing a first embodiment of a method of stripping a covered wire according to the present invention. First, the double-covered wire 2 is inserted between the length measuring rollers 16 of the stripping device, and then passed between the previously opened skinning blades 14 to strip the skin from the end 2a of the double-coated wire 2. The distance to the blade 14 is length (L1
+ L2 + α) (FIG. 1). Here, α> 0.

When the positioning is completed, as shown in FIG. 2, the peeling blade 14 is closed and cut into the second cover 8, and then the length measuring roller 16 is rotated in this state. Then, the double covered wire 2 is moved in the direction X by the length (L1 + L2). As a result, the first cover 6 is exposed over the length (L1 + L2).

Next, as shown by the dotted line in FIG. 3, the peeling blade 14 is completely closed at this position, the double-coated wire 2 is cut, and the tip 20 is cut off. Here, as described above, since the frictional resistance and the like exist between the tip portion of the peeling blade 14 and the first coating 6, the first coating 6 becomes (-X).
And almost simultaneously with the above cutting, X
, And as a result, the length of the exposed portion 12 becomes (L1 + L2-γ).

Thereafter, by rotating the length measuring roller 16 in the reverse direction, the double-coated wire 2 is moved by the length L2 in the (-X) direction, and the double-coated wire 2 is moved from the end 2a of the double-coated wire 2 in the X direction. L
The position 2 is positioned between the peeling blades 14 (FIG. 4).

Subsequently, at this position, the peeling blade 14 is closed and cut into the first cover 6 (FIG. 5), and then the length measuring roller 16 is rotated in this state. The double-covered wire 2 is moved in the direction X by a length L2 or more. As a result, the covering piece 21 (6) having the length (L2 -γ) is peeled off from the end 2a of the double covered wire 2 to form the core portion 10 having the length L2. Is adjusted to L1.

As described above, according to the first embodiment,
First, an exposed portion 12 having a length (L1 + L2-γ) is formed, and then the first covering 6 having a length (L2-γ) is peeled off from the end 2a of the double covered wire 2 to obtain a core portion. Since the exposed portions 12 and the exposed portions 12 are formed, the double covered wire 2 can be manufactured with high dimensional accuracy without being affected by the shrinkage of the first covering 6.

B. Second Embodiment By the way, the amount of shrinkage of the first coating 6, that is, the length γ, which is caused by the peeling of the second coating 8, that is, the length γ is longer than the length L 2 of the core wire portion 10 or the length (L 2 − When γ) is very short, the peeling treatment according to the first embodiment becomes impossible or difficult. Therefore, as a stripping method capable of coping with not only the case where the length (L2-γ) is sufficiently large but also the case described above, there is a method of stripping the covered wire according to the second embodiment described below. .

FIGS. 7 to 13 are views showing a second embodiment of the method of stripping a covered wire according to the present invention. First, as in the first embodiment, the double-coated wire 2 is inserted between the length-measuring rollers 16 of the peeling device, and then passed between the previously opened skinning blades 14 to form a double-coated wire. 2 is positioned at a position where the distance from the end 2a to the skinning blade 14 is the length (L1 + L2 + α + β) (FIG. 7). Where α> 0, β
> 0.

When the positioning is completed, as shown in FIG. 8, the peeling blade 14 is closed and cut into the second covering 8, and then the length measuring roller 16 is rotated in this state. Then, the double coated wire 2 is moved in the direction X by the length (L1 + L2 + β). As a result, the first covering 6 is exposed over the length (L1 + L2 + β), and the exposed portion 12 is formed.

Next, as shown by the dotted line in FIG. 9, the peeling blade 14 is completely closed at this position, the double-coated wire 2 is cut, and the tip 20 is cut off. Here, as described above, since the frictional resistance and the like exist between the tip portion of the peeling blade 14 and the first coating 6, the first coating 6 becomes (-X).
And almost simultaneously with the above cutting, X
, And as a result, the length of the exposed portion 12 becomes (L1 + L2 + β-γ).

Subsequently, the length measuring roller 16 is rotated in the reverse direction to move the double coated wire 2 by the length β in the (-X) direction, and then the peeling blade 14 is completely closed as described above. And cut the double-coated wire 2 and cut off the tip 22 (FIG. 1).
0). Thus, the length of the exposed portion 12 is (L1 + L2).
Thus, the contracted portion of the first cover 6 is completely removed.

Thereafter, the double covered wire 2 is further moved by the length L2 in the (-X) direction by the length measuring roller 16, and the position of the length L2 in the X direction from the end 2a of the double covered wire 2 is determined. It is positioned between the peeling blades 14 (FIG. 11). Then, after the peeling blade 14 is closed and cut into the first covering 6 (FIG. 12), the length measuring roller 16 is rotated in this state to move the double covering wire 2 in the direction X. Then, the strip 21 (6) having the length L2 is peeled off from the end 2a of the double coated wire 2 by moving the wire L2 or more distance (FIG. 13). Thus, the core portion 10 having the length L2 is formed, and the length of the exposed portion 12 is adjusted to L1.

As described above, according to the second embodiment, first, the exposed portion 12 having the length (L1 + L2 + β-γ) is formed, and then the exposed portion 12 is cut from the end 2a of the double covered wire 2 over the length β. After completely removing the contracted portion of the first coated body 6 by removing, the first coated body 6 having the length L2 is peeled off from the end 2a of the double coated wire 2 after cutting. Therefore, even when the length γ is longer than the length L2 of the exposed portion 12, the core portion 10 and the exposed portion 12 are formed. The double coated wire 2 can be manufactured with high dimensional accuracy without being affected.

In the above embodiment, the double covered wire 2 is moved by the length measuring roller 16 in the X direction or the (-X) direction. The peeling blade 14 may be moved in the X direction, or both may be moved. In short, when the skinning process is performed, the double-coated wire 2 is moved in the X direction or (−) with respect to the skinning blade 14 while the skinning blade 14 is cut.
What is necessary is just to make it relatively move in the X) direction.

[0028]

As described above, according to the present invention, the second
After removing the influence of the shrinkage of the first coating due to the stripping treatment of the coating, the first coating is peeled off, so that the first coating can be removed from the end of the double coated wire with high dimensional accuracy. The first and second coatings can be stripped.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of a method for stripping a covered wire according to the present invention.

FIG. 2 is a view showing a first embodiment of a method of stripping a covered wire according to the present invention.

FIG. 3 is a view showing a first embodiment of a method of stripping a covered wire according to the present invention.

FIG. 4 is a view showing a first embodiment of a method for stripping a covered wire according to the present invention.

FIG. 5 is a view showing a first embodiment of a method of stripping a covered wire according to the present invention.

FIG. 6 is a view showing a first embodiment of a method for stripping a covered wire according to the present invention.

FIG. 7 is a view showing a second embodiment of the method of stripping a covered wire according to the present invention.

FIG. 8 is a view showing a second embodiment of the method for stripping a covered wire according to the present invention.

FIG. 9 is a view showing a second embodiment of the method of stripping a covered wire according to the present invention.

FIG. 10 is a view showing a second embodiment of the method of stripping a covered wire according to the present invention.

FIG. 11 is a view showing a second embodiment of the method of stripping a covered wire according to the present invention.

FIG. 12 is a view showing a second embodiment of the method of stripping a covered wire according to the present invention.

FIG. 13 is a view showing a second embodiment of the method of stripping a covered wire according to the present invention.

FIG. 14 is a diagram showing a configuration of a double covered wire as a background of the present invention.

FIG. 15 is a view showing a conventional method of stripping a covered wire.

FIG. 16 is a view showing a conventional method of stripping a covered wire.

FIG. 17 is a diagram showing a conventional method of stripping a covered wire.

FIG. 18 is a view showing a conventional method of stripping a covered wire.

FIG. 19 is a view showing a double-coated wire manufactured by a conventional method of stripping a coated wire.

[Explanation of symbols]

 Reference Signs List 2 double coated wire 2a end 4 core wire 6 first coated body 8 second coated body 10 core wire section 12 exposed section 14 peeling blade

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-64-3608 (JP, A) JP-A-60-96115 (JP, A) JP-A-3-107318 (JP, A) JP-A-4- 257802 (JP, A) JP-A-60-204206 (JP, A) JP-A-5-181021 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02G 1/12

Claims (2)

(57) [Claims] 1. A double-coated wire comprising a core covered with a first covering and a first covering covered with a second covering. A predetermined length of each of the coverings is peeled off using a peeling blade to form a core portion in which the core wire is exposed by the length L2 in the direction from the one end to the other end, and from the core portion to the other end direction. A method of peeling a covered wire for forming an exposed portion where the first covered body is exposed by a length L1 from the one end to the other end of the covered wire (L1 + L2 + α; , Α> 0) at the position
After the stripping blade is cut into the covering body, the coated wire is moved relative to the stripping blade by the length (L1 + L2) with respect to the stripping blade, and then the stripping blade is cut. A first step of cutting the covered wire at a position having a length L2 in the direction of the other end from the cutting position at the position of a length L2. A second step of moving the covered wire relative to at least the length L2 in the direction of the other end with respect to the peeling blade. 2. A double-coated wire comprising a core covered with a first covering, and a first covering covered with a second covering. A predetermined length of each of the coverings is peeled off using a peeling blade to form a core portion in which the core wire is exposed by the length L2 in the direction from the one end to the other end, and from the core portion to the other end direction. A method of peeling a covered wire for forming an exposed portion where the first covering body is exposed by a length L1 from the one end to the other end of the covered wire (L1 + L2 + α + β; , Α> 0, β> 0), cut the stripping blade into the second cover, and in that state, extend the coating wire with respect to the stripping blade in the other end direction. (L1 + L2 + β), and then move the relative position by (L1 + L2 + β). A second step of cutting the covered wire at a position having a length β in the direction of the other end from the cutting position in the first step; and extending in the direction of the other end from the cutting position in the second step. At the position of L2, the stripping blade is cut into the first covering body, and in this state, the coating wire is relatively moved at least the length L2 toward the other end with respect to the peeling blade. And a step of stripping the covered wire.