JP2012005220A - Method and device for peeling coating of electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for peeling coating capable of eliminating a damage to a core wire.SOLUTION: A controller controls a length measuring roller 5 and a first coating peeling blade 6, after putting a first cut at a position separated from a terminal of an electric wire 2 of a coating part 4 by a predetermined length L/2 by a pair of first coating peeling blades 6, approaches the coating part 4 on the terminal side rather than the first cut to the terminal side by the first coating peeling blades 6 to be removed from the electric wire 2. After that, the controller controls the length measuring roller 5 and a second coating peeling blade 7, puts a second cut at a position separated from the terminal of the electric wire 2 rather than the first cut of the coating part 4 by a second coating peeling blade 7, and approaches the coating part 4 between the second cut and the first cut to the terminal side to remove the electric wire 2.

Description

  The present invention relates to a method for stripping an electric wire and a device for stripping an electric wire, and more particularly, to a method for stripping an electric wire and stripping an electric wire.

  Various electronic devices are mounted on automobiles or the like as moving bodies. For this reason, the automobile or the like is wired with a wire harness in order to transmit electric power from a power source or the like or a control signal from a computer or the like to the electronic device. The wire harness includes a plurality of electric wires and a connector attached to the end of the electric wires. The electric wire includes a conductive core wire and a coating portion made of an insulating coating resin that covers the core wire. The electric wire is a so-called covered electric wire.

  In order to attach the above-described electric wire to the connector, it is necessary to peel off the covering portion of the terminal. As the coating stripping apparatus 100 for stripping the coating portion of the electric wire, the one shown in FIG. 4 has been proposed (for example, Patent Documents 1 to 7). The coating stripping device 100 is a device that strips the coating part 201 of the end of the electric wire 200.

  The stripping apparatus 100 includes a pair of stripping blades 101, a pair of length measuring rollers 102 as moving means for moving the electric wire 200 along the longitudinal direction Y1, the pair of stripping blades 101, and a pair of length measuring units. A controller (not shown) that controls the roller 102 to peel off the covering portion 201 of the electric wire 200.

  The pair of coating stripping blades 101 are arranged so as to position the electric wire 200 between them, and are provided so as to be able to contact and separate from each other. The pair of length measuring rollers 102 are arranged along the vertical direction, for example, and are rotated at the same rotational speed in opposite directions by a motor (not shown).

  The pair of length measuring rollers 102 move the electric wire 200 in the longitudinal direction Y1 by rotating in a state where the electric wire 200 is sandwiched between them. That is, as shown in FIG. 4A, when the vertical upper side of the pair of length measuring rollers 102 is rotated counterclockwise and the lower vertical side is rotated clockwise, the electric wire 200 moves in the terminal direction Y11. .

  On the other hand, as shown in FIG. 4B, when the vertical upper side of the pair of length measuring rollers 102 is rotated clockwise and the vertical lower side is rotated counterclockwise, the electric wire 200 moves in the direction Y12 away from the terminal. . The above-described control device (not shown) is composed of a microcomputer, and controls driving of the pair of stripping blades 101 in the contact / separation direction and rotation of the pair of length measuring rollers 102.

  Next, the operation of the coating stripping apparatus 100 configured as described above will be described. First, as shown in FIG. 4A, the control device (not shown) rotates the vertical upper side of the pair of length measuring rollers 102 counterclockwise and the vertical lower side clockwise to thereby rotate the electric wire 200. Is moved toward the terminal direction Y11, and the pair of coating stripping blades 101 is positioned at a position away from the terminal of the electric wire 200 by a predetermined coating stripping margin L.

  Next, as shown in FIG. 4B, the control device (not shown) brings the pair of coating stripping blades 101 closer to each other and cuts the coating portion 201 of the electric wire 200. Thereafter, a control device (not shown) rotates the upper side in the vertical direction of the pair of length measuring rollers 102 and counterclockwise the lower side in the vertical direction in a state where the pair of stripping blades 101 are brought close to each other and bite into the coating unit 201. The wire 200 is rotated by the coating stripping dimension S toward the direction Y12 away from the terminal. Thereby, the coating part 201 on the terminal side is brought closer to the terminal side than the cut by the pair of coating peeling blades 101, and the coating part 201 corresponding to the coating peeling dimension L can be removed.

JP 7-31027 A JP 2000-133066 A JP 2001-112137 A JP 2006-158170 A JP 2005-33929 A JP 2007-166871 A JP-A-6-276636

  However, in the above-described coating stripping apparatus 100, since the coating portion 201 is moved toward the terminal side and removed only once, and it is necessary to increase the coating stripping margin L as in, for example, a double coated wire, The contact area between the covering portion 201 and the core wire 202 increases, and the frictional resistance increases. For this reason, in particular, when the core wire 202 is thin, the core wire 202 may be damaged such as disconnection.

  Then, this invention makes it a subject to provide the coating peeling method and coating peeling apparatus which can exclude the damage to a core wire.

  The invention according to claim 1 for solving the above-mentioned problem is a method of stripping the coating portion of the end of the electric wire, in a method of stripping the coating of the electric wire, a position separated from the end of the wire by a coating stripping blade by a predetermined length. A first cutting step for making a first cut into the first cutting step, a first removing step for moving the covering portion closer to the terminal side than the first cutting toward the terminal side and removing it from the electric wire, and the covering portion by means of a covering peeling blade A second incision step for making a second incision at a position farther from the end of the wire than the first incision, and between the second incision and the first incision after the first removal step. And a second removing step of removing the electric wire by bringing the covering portion toward the terminal side.

  According to a second aspect of the present invention, at least one of the pair of coating stripping blades that are arranged so as to position the electric wire between each other and that can be separated from each other, and at least one of the electric wire and the pair of coating stripping blades, A wire stripping device comprising: a moving means that moves along the wire strip; and a control means that controls the stripping blade and the moving means to strip the sheath of the end of the wire. First covering means for making a first cut at a position away from the end of the electric wire of the covering portion by a covering peeling blade, and the covering portion on the terminal side from the first cutting by the covering peeling blade A first removal means for moving the wire toward the terminal side and removing it from the electric wire, and a second cut made at a position farther from the terminal of the electric wire than the first cut of the covering portion by the coating stripping blade. Cut off And after the removal by the first removing means is completed, the covering portion between the second cut and the first cut is moved toward the terminal side and removed from the electric wire by the cover peeling blade. And a stripping device for an electric wire.

  According to a third aspect of the present invention, two pairs of the pair of coating stripping blades are provided at intervals along the longitudinal direction of the electric wire, and the moving means sandwiches the electric wire between each other. The first cutting means moves the electric wire in the longitudinal direction by rotating, and the first incision means brings the pair of coating stripping blades on the terminal side out of the two pairs of coating stripping blades close to each other. A first cut is made, and the second cutting means closes the pair of coating stripping blades on the side away from the terminal of the two pairs of coating stripping blades after the removal by the first removal unit is completed. The second incision is made by the apparatus for stripping an electric wire according to claim 2.

  As described above, according to the first and second aspects of the invention, since the covering portion is removed at least twice, the length of the covering portion to be removed at one time is short, and the covering portion and the core wire to be removed are removed. Since the contact area can be suppressed, damage to the core wire due to frictional resistance can be eliminated.

  According to the third aspect of the present invention, since the pair of coating stripping blades are provided in two pairs at intervals along the longitudinal direction of the electric wire, both the first cutting and the second cutting are performed by the pair of coating stripping blades. Since the movement of the electric wire can be reduced as compared with the case of putting in, the covering portion can be peeled off quickly.

It is a partial side view which shows one Embodiment of the coating peeling apparatus which implemented the coating peeling method of this invention. It is explanatory drawing for demonstrating operation | movement of the coating stripping apparatus shown in FIG. It is a flowchart which shows the process sequence of the control apparatus which comprises the coating stripping apparatus shown in FIG. It is explanatory drawing for demonstrating the structure and operation | movement of the conventional coating stripping apparatus.

  A wire stripping device (hereinafter simply referred to as a stripping device) that implements the wire stripping method of the present invention will be described below with reference to FIGS. The coating stripping device 1 is a device that strips the coating 4 at the end of the electric wire 2.

  The electric wire 2 constitutes a wire harness that is routed to an automobile as a moving body. The said electric wire 2 is provided with the electroconductive core wire 3 and the insulating coating | coated part 4 as shown to FIG. 2 (C) and (D). In the present embodiment, the core wire 3 is formed by twisting a plurality of conducting wires. However, the core wire 3 may be composed of a single conducting wire.

  The covering portion 4 covers the core wire 3 and is made of a synthetic resin such as polyvinyl chloride (PVC). In this embodiment, the coating | coated part 4 is comprised by overlapping two layers. That is, the electric wire 2 is a so-called double electric wire, but the covering portion 4 may be formed of one layer.

  A plurality of the electric wires 2 having the above-described configuration are bundled and a connector or the like is attached to the terminal to constitute the above-described wire harness. The connector is connected to a connector of various electronic devices such as an automobile, and the wire harness, that is, the electric wire 2 transmits various signals and electric power to each electronic device. Thus, the electric wire 2 needs to peel off the coating | coated part 4 of a terminal in order to attach a connector.

  The coating stripping apparatus 1 includes a length measuring roller 5 as a moving means for moving the electric wire 2 along the longitudinal direction Y1, first and second coating stripping blades 6 and 7, the length measuring roller 5 and the first length measuring roller 5. And a control device 8 for controlling the second covering stripping blades 6 and 7 to strip the covering portion 4 of the electric wire 2.

  A pair of the length measuring rollers 5 are provided on a frame (not shown) installed on a floor such as a factory. The pair of length measuring rollers 5 are rotatably supported and are arranged along the vertical direction. In the example shown in FIGS. 1 and 2, the length measuring rollers 5 are arranged along the vertical direction, but may be arranged along the horizontal direction. The pair of length measuring rollers 5 are rotated in the same direction in the opposite directions by a motor (not shown) or the like. The pair of length measuring rollers 5 move the electric wire 2 in the longitudinal direction Y1 by rotating in a state where the electric wire 2 is sandwiched between them.

  That is, as shown in FIG. 2A, when the vertical direction upper side of the pair of length measuring rollers 5 is rotated counterclockwise and the lower vertical direction is rotated clockwise, the electric wire 2 moves in the terminal direction Y11. . On the other hand, as shown in FIG. 2 (B), when the vertical direction upper side of the pair of measuring rollers 5 is rotated clockwise and the vertical lower side is rotated counterclockwise, the electric wire 2 moves in the direction Y12 away from the terminal. Moving.

  A pair of the first cover peeling blades 6 is provided on the terminal direction Y11 side with respect to the length measuring roller 5. The pair of first covering stripping blades 6 are provided side by side along the vertical direction. The pair of first covering stripping blades 6 are disposed so as to position the electric wire 2 therebetween, and are provided so as to be able to contact and separate from each other along the vertical direction. When the pair of first covering stripping blades 6 come close to each other, the covering portion 4 is cut with the electric wire 2 interposed therebetween. When the pair of first covering stripping blades 6 are separated, of course, they are separated from the electric wire 2.

  A pair of the second cover stripping blades 7 is provided between the length measuring roller 5 and the first cover stripping blade 6. That is, the first coating stripping blade 6 and the second coating stripping blade 7 are arranged with a space therebetween along the longitudinal direction Y1 of the electric wire 2. In addition, the pair of second covering stripping blades 7 are provided side by side along the vertical direction. The pair of second covering stripping blades 7 are disposed so as to position the electric wire 2 therebetween, and are provided so as to be able to contact and separate from each other along the vertical direction. When the pair of second covering stripping blades 7 approach each other, a cut is made in the covering portion 4 with the electric wire 2 interposed therebetween. When the pair of second covering stripping blades 7 are separated, of course, they are separated from the electric wire 2.

  The control device 8 is a computer including a known RAM, ROM, CPU, and the like. The control device 8 is connected to the length measuring roller 5, the first and second coating stripping blades 6, 7, and the like, and by controlling these operations, the coating stripping margin L of the coating section 4 is set to 2 in advance. Divide equally and peel in two portions.

  Next, the operation of the coating stripping apparatus 1 having the above-described configuration will be described with reference to the explanatory diagram of FIG. 2 and the flowchart of FIG. First, as shown in FIG. 2A, the control device 8 rotates the upper side in the vertical direction of the length measuring roller 5 counterclockwise and the lower side in the vertical direction clockwise, so that the electric wire 2 is directed in the terminal direction Y11. After the first covering stripping blade 6 is positioned at a position L / 2 (= predetermined length) half the coating stripping margin L from the end of the electric wire 2, the length measuring roller 5 is rotated. Stop (step S1).

  The control device 8 controls the position of the electric wire 2 in the longitudinal direction Y1 by controlling the number of rotations of the length measuring roller 5. Subsequently, the control device 8 functions as first cutting means, and as shown in FIG. 2 (B), the first coating stripping blades 6 are brought close to each other and the first cutting is made in the coating portion 4 of the electric wire 2 (step). S2). Step S2 mentioned above corresponds to the 1st cutting process in a claim.

  Thereafter, as shown in FIG. 2 (B), the control device 8 functions as a first removing means, and rotates the upper side of the length measuring roller 5 in the clockwise direction and the lower side in the vertical direction counterclockwise. 2 is moved in a direction Y12 away from the terminal by a predetermined coating stripping dimension S (step S3). As a result, as shown in FIG. 2C, the covering portion 4 on the terminal side is moved closer to the terminal side than the first notch by the first covering peeling blade 6, and the covering portion 4 for the covering peeling dimension S is removed. It can be removed from the electric wire 2. Step S3 described above corresponds to the first removal step in the claims.

  Thereafter, as shown in FIG. 2C, the control device 8 separates the first coating stripping blades 6 from each other and away from the electric wire 2 (step S4). Next, the control device 8 functions as a second cutting means, and brings the second coating stripping blades 7 close to each other to make a second cutting in the coating portion 4 of the electric wire 2 (step S5). Thereby, the 2nd cutting can be made in the position farther from the end of electric wire 2 than the 1st cutting of covering part 2 with the 2nd covering stripping blade 7. FIG. Step S5 mentioned above corresponds to the 2nd cutting process in a claim.

  Further, as shown in FIG. 2, the distance between the first coating stripping blade 6 and the second coating stripping blade 7 is a length obtained by combining the half length L / 2 of the coating stripping allowance L and the coating stripping dimension S. If it is set to (L / 2 + S), after step S3 is completed, even if the electric wire 2 is not moved, the second cover stripping blade 7 is positioned at a position separated by L / 2 from the first cut. That is, the first cut and the second cut can be made to divide the coating stripping allowance L into two equal parts.

  Next, the control device 8 functions as a second removing unit, and as shown in FIG. 2C, rotates the length measuring roller 5 in the clockwise direction on the upper side in the vertical direction, and rotates in the counterclockwise direction on the lower side in the vertical direction. The electric wire 2 is moved by a predetermined stripping dimension L2 in the direction Y12 away from the terminal (step S6). As a result, as shown in FIG. 2D, the covering portion 4 between the second cut and the first cut is moved toward the terminal side by the second cover peeling blade 7, and the coating peel dimension S is obtained. The covering portion 4 can be removed from the electric wire 2. Step S6 described above corresponds to the second removal step in the claims.

  Thereafter, the control device 8 separates the second covering stripping blades 7 from each other and from the electric wire 2 (step S7), and then ends the process.

  According to the coating stripping apparatus 1 described above, since the coating part 4 is removed at least twice, the length of the coating part 4 to be removed at one time is short, and the gap between the coating part 4 to be removed and the core wire 3 is removed. Since the contact area can be suppressed, damage to the core wire 3 due to frictional resistance can be eliminated.

  According to the coating stripping apparatus 1 described above, since the pair of coating stripping blades 6 and 7 are provided in two pairs at intervals along the longitudinal direction Y1 of the electric wire 2, the first cutting is performed only with the pair of coating stripping blades. Since the movement of the electric wire 2 can be reduced as compared with the case where both of the second cuts are made, the covering portion 4 can be peeled off quickly.

  In addition, according to embodiment mentioned above, although the coating | coated part 4 was removed in 2 steps, this invention is not limited to this. In the present invention, at least the first cut and the second cut may be made and the covering portion 4 may be removed in two steps. The third cut, the fourth cut, etc. are put in and divided into three or more steps. The covering portion 4 may be removed.

  Further, according to the above-described embodiment, the distance between the first coating stripping blade 6 and the second coating stripping blade 7 is a length obtained by combining the half length L / 2 of the coating stripping allowance L and the coating stripping dimension S. (L / 2 + S), and after the step S3 is completed, the second covering stripping blade 7 is brought close to the second incision without moving the electric wire 2, but the present invention is not limited to this. Absent. If it is difficult to set the distance between the first coating stripping blade 6 and the second coating stripping blade 7 to the length (L / 2 + S), after step S3 is completed, the second coating stripping blade 7 is moved from the first cut. The electric wire 2 may be moved so as to be located at a position separated by L / 2.

  Moreover, according to embodiment mentioned above, although the 1st cut and the 2nd cut were put and the coating stripping allowance L was equally divided and removed, this invention is not limited to this. The coating stripping allowance L need not be divided equally.

  In addition, according to the above-described embodiment, after the first cut is made and the terminal-side covering portion 4 is moved closer to the terminal side than the first cut, the second cut is made and the second cut is made. However, the present invention is not limited to this. For example, after the first cut and the second cut are made first, the terminal side covering 4 is moved closer to the terminal side than the first cut, and then the second cut and the first cut The covering portion 4 between them may be brought closer to the terminal side.

  Moreover, according to embodiment mentioned above, although the electric wire 2 was moved as a moving means, this invention is not limited to this. The moving means only has to move at least one of the electric wire 2 and the first and second coating stripping blades 6 and 7 along the longitudinal direction Y1, and fixes the electric wire 2 to the first and second coating stripping blades 6, 7 may be moved to peel off the covering portion 4. Moreover, you may make it move both the electric wire 2 and the 1st, 2nd coating stripping blades, and strips the coating | coated part 4. FIG.

  Moreover, according to embodiment mentioned above, although the coating stripping blade provided two pairs of the 1st, 2nd coating stripping blades 5 and 6, this invention is not limited to this. For example, you may make it remove by putting both the 1st cut and the 2nd cut using a pair of covering stripping blades.

  Further, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Cover stripping apparatus 2 Electric wire 4 Covering part 5 Length measuring roller (moving means)
6 First coating stripping blade (coating stripping blade)
7 Second coating stripping blade (coating stripping blade)
8. Control device (control means, first cutting means, first removal means, second cutting means, second removal means)

Claims (3)

In the method of stripping the sheath of the wire to strip the sheath of the end of the wire,
A first incision step in which a first incision is made at a position away from the end of the electric wire of the covering portion by a covering stripping blade; and
A first removal step of removing the covering portion closer to the terminal side than the first incision toward the terminal side and removing it from the electric wire;
A second incision step of making a second incision at a position farther from the end of the electric wire than the first incision of the covering portion by means of a covering stripping blade;
A second removal step of removing the electric wire by moving the covering portion between the second cut and the first cut toward the terminal side after the first removal step;
A method for stripping the coating of an electric wire, characterized in that A pair of covering stripping blades arranged so as to position the electric wire between each other, and a moving means for moving at least one of the electric wire and the pair of coating stripping blades along a longitudinal direction of the electric wire; In the wire coating stripping device, comprising: a control unit that controls the coating stripping blade and the moving unit to strip the coating part of the end of the wire.
The control means includes a first cutting means for making a first cut at a position a predetermined length away from the end of the electric wire of the coating portion by the coating peeling blade, and the first cutting by the coating peeling blade than the first cutting. A first removing means for moving the covering portion on the terminal side toward the terminal side and removing it from the electric wire, and a second position at a position farther from the terminal of the electric wire than the first cut of the covering portion by the covering peeling blade. A second incision means for making an incision, and after the removal by the first removal means, the covering portion between the second incision and the first incision is brought close to the terminal side by the covering stripping blade And a second removing means for removing from the electric wire. The pair of coating stripping blades are provided in two pairs spaced apart from each other along the longitudinal direction of the electric wire,
The moving means is composed of a pair of rollers for moving the electric wire in the longitudinal direction by rotating in a state where the electric wire is sandwiched between them,
The first cutting means makes the first cut by bringing the pair of coating stripping blades on the terminal side out of the two pairs of coating stripping blades close to each other,
After the removal by the first removal means is completed, the second cutting means closes the pair of coating peeling blades on the side away from the terminal of the two pairs of coating peeling blades to make the second cutting. The apparatus for stripping an electric wire according to claim 2, wherein:

Images