JPH0595613A - Semi-stripping method for electric wire - Google Patents

Abstract

PURPOSE:To prevent the bending of a core caused by the opening of cutters. CONSTITUTION:After the end-part-side covering 61 of an electric wire 50 is separated from the remaining covering 62 by moving the end part of the electric wire 50 backward in a state of the covering being cut by cutters 201, the electric wire 50 is moved forward before opening the cutters 201. This separates from the cutters 201 the end-part-side covering 61 having adhered to the cutters 201 at the time of the backward movement of the electric wire. Accordingly, it becomes possible to prevent the bending of the core 52, since the electric wire 50 does not follow the cutters 201 at the time of the opening of the cutters 201.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for semi-striping electric wires used in manufacturing harnesses and the like.

[0002]

2. Description of the Related Art When manufacturing an electric wire in which a core wire at an end is twisted, first, as shown in FIGS.
The electric wire 10 is held by a clamp 1 which is movable on a horizontal plane including the longitudinal direction thereof, and the end portion of the electric wire 10 is fed between a pair of cutters 2. Then, as shown in FIG.
The covering portion of the end portion of the electric wire 10 is cut by the pair of cutters 2, and in that state, the electric wire 10 is slightly retracted in the arrow Q direction by moving the clamp 1. As a result, as shown in FIG. 31, the covering portion 12 on the electric wire end side with respect to the cut positions of the pair of cutters 2 is separated from the remaining covering portion 11 so as not to drop from the core wire 10a (semi-strip processing).

After opening the pair of cutters 2,
As shown in FIG. 32, the electric wire 10 is laterally moved by the clamp 1, and the end portion of the electric wire 10 subjected to the semi-strip process is paired with the pair of upper and lower files 4 of the core wire twisting device 3 arranged in parallel.
Place in between. Subsequently, as shown in the imaginary line in the figure, the covering portion 11 on the end side of the electric wire 10 is sandwiched between the pair of files 4 from above and below, and in that state, the one file 4 is moved in the left direction R along the longitudinal direction thereof. While moving, the file 4 on the other side is moved in the right direction S. As a result, the core wire 10a is twisted and twisted together with the covering portion 12 on the end side.

[0004]

However, in the above-mentioned conventional semi-strip method, when the electric wire 10 is retracted by the cutter 2 as shown in FIG. 30 and FIG. 31, the covering portion 12 on the end side is retracted. Is pressed by the pair of cutters 2 and the covering portion 11 which is a soft material adheres to the pressing surface of the cutter 2. Therefore, for example, when the cutter 2 is opened with the covering portion 12 attached to the upper cutter 2, the covering portion 1 is opened as shown in FIG.
There was a problem that the wire 2 was lifted following the cutter 2, the electric wire 10 was bent upward, and the core wire 10a was bent.

An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a method for semi-striping an electric wire which can prevent the core wire from bending at the end of the electric wire.

[0006]

SUMMARY OF THE INVENTION According to the present invention, the electric wire is moved by moving the clamp away from the pair of cutters in a state where a covering portion of an end portion of the electric wire held by the clamp is cut by a pair of cutters. By a predetermined amount, after separating the coating portion of the electric wire end side from the cutting position of the pair of cutters from the remaining coating portion, by a semi-strip method of the electric wire to open the pair of cutters Then, in order to achieve the above object, by separating the covering portion on the side of the electric wire from the remaining covering portion, and before opening the pair of cutters, by moving the clamp close to the cutter, The electric wire is moved forward by a predetermined amount so that the covering portion on the end portion side attached to the cutter is separated from the cutter when the electric wire retreats.

[0007]

According to the electric wire semi-strip method of the present invention, the electric wire is retracted in a state of being cut by a cutter to separate the end side covering portion from the remaining covering portion, and then the electric wire is advanced by a predetermined amount. Therefore, when the electric wire is retracted, the covering portion on the end side attached to the cutter is separated from the cutter. Therefore, when the cutter is opened thereafter, the electric wire does not follow the cutter, and the bending of the core wire can be prevented.

[0008]

EXAMPLES <A. Structure of Embodiment> FIG. 1 is a schematic plan view showing a harness manufacturing apparatus to which a semi-strip method for electric wires according to an embodiment of the present invention can be applied.

As shown in the figure, this harness manufacturing apparatus includes a length measuring unit 100 and a cutter unit 200.
A rear clamp 250, a twisting unit 300, a flux unit 350, a solder unit 400,
It has a terminal crimping unit 450 and moving means 500, 550. Then, in this device, two long electric wires are subjected to various treatments described in detail later,
As shown in FIG. 27, the coatings on both ends were stripped off, and the core wire 52 on one end side was twisted to attach the solder 403, and the terminals 53 were crimped to the core wire 52 on the other end side. Two harnesses 51 are sequentially manufactured.

Hereinafter, each unit will be described in detail.

FIG. 2 is a side view of the length measuring unit 100, and FIG.
2 is a sectional view taken along line III-III in FIG. 2, and FIG. 4 is a sectional view taken along line IV-IV in FIG. As shown in FIGS. 1 to 4, the length measurement unit 100 has a main body frame 101 and a feeding portion 102, and feeds the rotation shaft 106 rotatably attached to the front portion of the main body 101. The depression frame 103 of the portion 102 is rotatably attached. Then, when the rod 109 of the cylinder 108 provided between the main body frame 101 and the depression frame 103 is driven backward, the feeding unit 102 bends downward with the rotation shaft 106 as a fulcrum, and when the rod 109 is driven forward, The state in which the feeding unit 102 is shown in FIG. 2 (hereinafter, “horizontal posture”)
Called)).

Electric wire feeding lines Xa and Xb of the depression frame 103
On the other hand, in the upper position, the rotary shaft 1 is parallel to the rotary shaft 106.
05 is rotatably attached. And both rotary shafts 1
The base end sides of a pair of left and right open / close plates 115, 116 are rotatably attached to substantially central portions of 05, 106 so that the open / close plates 115, 116 can rotate around the respective rotary shafts 105, 106. Composed.
Roller shafts 117 and 118 are rotatably mounted between the tips of the open / close plates 115 and 116, and feed rollers 119 and 120 are fixed to the roller shafts 117 and 118, respectively.

Further, as shown in FIGS. 3 and 4, gears 127 and 128 meshing with each other are attached to the base end sides of both the opening and closing plates 115 and 116. This allows
For example, when the upper opening / closing plate 115 is swung, the swinging force is transmitted to the lower opening / closing plate 116 via the gears 127 and 128, and the lower opening / closing plate 116 is moved.
Swings in a direction opposite to the upper opening / closing plate 115.

A motor 111 (FIG. 3) is attached to the body frame 101. The rotation of the rotary drive shaft of the motor 111 is transmitted to the lower rotary shaft 106 via the belt 112 and the pulley 110, and the gear 11
It is configured to be transmitted to the upper rotary shaft 105 via 3, 114. Furthermore, both rotary shafts 105, 106
Rotation of the pulleys 123, 124, belts 125, 12
6, pulleys 121, 122 and roller shafts 117, 11
8 is transmitted to both feeding rollers 119 and 120 respectively.

As shown in FIG. 2, the upper and lower opening / closing plates 11
A tension spring 129 is stretched between the five and 116. Then, in a state in which the electric wires inserted into the guide pipes 130, 130 are arranged on the electric wire feeding lines Xa, Xb, the feeding rollers 119, 12 are caused by the tension springs 129.
The rollers 119 and 120 are urged in the direction in which 0 approaches.
Holds the electric wire. In this state, the motor 1
When the feeding rollers 119 and 120 are rotated by the rotational drive of 11, the electric wires are fed along the feeding lines Xa and Xb.

A front clamp (hereinafter referred to as "F clamp") 150 is attached to the front portion of the elevation frame 103. This F clamp 150 has electric wire feeding lines Xa, X
The wire insertion holes 151, 151 (FIG. 3) are formed corresponding to b, and the wire insertion holes 151, 1
It is configured so that the electric wires respectively inserted into 51 can be grasped and released.

The length measuring unit 100 configured as described above
However, as shown in FIG. 1, it is movably supported in the horizontal plane by the moving means 500.

More specifically, the moving means 500 is provided with a main body 501 along the left and right directions R and S, and on the main body 501 is movably left and right along the left and right directions R and S. The moving body 502 is supported. Then, the left and right moving body 502 is moved to the main body 50 by driving the motor 502M.
1 is configured to move in the left-right direction.

As shown in FIG. 2, a guide rail 503 is mounted on the left and right moving body 502 along the front-rear directions P and Q, and a slider 504 is slidably mounted on the guide rail 503. This slider 5
The length measuring unit 100 is attached to 04. The length measuring unit 100 is configured to move in the front-rear direction with respect to the left-right moving body 502 by driving the motor 100M (see FIG. 1). Thus, the measuring unit 100
Is movable in a horizontal plane.

FIG. 5 is a perspective view of the main part of the cutter unit 200 and its peripheral part. As shown in FIGS. 1 and 5, the cutter unit 200 includes an electric wire feeding line X.
A pair of cutters 201, 201 are provided on both upper and lower sides of a and Xb. The pair of cutters 201, 201 is supported by a cutter body (not shown) so as to be movable in the vertical direction. Further, the cutters 201, 201 are configured to open and close by driving a motor 201M (see FIG. 1).

The rear clamp (hereinafter referred to as "R clamp") 250 is provided with substantially L-shaped fixing claws 251 and 251 corresponding to the two electric wires 50 arranged on the electric wire feeding lines Xa and Xb, respectively. Be done. Furthermore, the fixed claw 251,
On the horizontal part of 251, the movable claws 252 and 252 are arranged in the left-right direction R orthogonal to the electric wire feeding lines Xa and Xb, respectively.
It is attached to the S so that it can move back and forth. Then, the fixed claws 251,
The movable claws 252, 252 are driven forward and backward by driving the cylinders 253, 253 mounted on the 251 to grip the electric wires 50, 50 arranged between the vertical portion of the fixed claw 251 and the movable claw 252, respectively. It is configured so that it can be released.

As shown in FIG. 1, this R clamp 250
Are configured to be movable in the horizontal plane by the moving means 550.

That is, the left and right moving bodies 552 are movably supported by the main body 551 of the moving means 550 along the left and right directions R and S, and the left and right moving bodies 552 move in the left and right directions R and S by driving the motor 552M. To be configured. Then, the R clamp 250 is mounted on the left and right moving body 552.
Is movably supported along the front-rear directions P and Q, and the R clamp 250 is configured to move along the front-rear directions P and Q with respect to the left-right moving body 552 by driving the motor 250M.

FIG. 6 shows a perspective view of a main part of the twisting unit 300. As shown in the figure, the twisting unit 300 is provided with two files 301 and 301 which are parallel to each other and whose longitudinal directions are arranged along the left and right directions R and S. The two files 301, 301 are configured to be movable in the up-down direction while being kept parallel to each other by a driving means (not shown), and to be movable in the longitudinal direction (left-right direction R, S).

As shown in FIG. 1, the flux unit 3
50 and the solder unit 400 respectively include a flux tank 351 and a solder tank 4 whose upper portions are open to the outside.
04 are arranged.

On the other hand, in this harness manufacturing apparatus, each drive unit is connected to a control unit (not shown), and the drive of each drive unit is controlled based on an output signal from the control unit, which will be described below. Such an operation is performed.

<B. Operation and Effect of Example Apparatus> Next, the operation of the harness manufacturing apparatus will be described.

Before starting the operation, the length measuring unit 10
The feeding unit 102 of 0 is held in a horizontal posture, and the electric wire 50 is sandwiched by a pair of feeding rollers 119 and 120. The F clamp 150 and the R clamp 250 are
Each of the electric wires 50 is in a released state.

From this state, when an operation start command is given to the control section, the feed rollers 119, 120 rotate by a predetermined amount, and the electric wire 50 moves by a predetermined amount in the arrow P direction along the electric wire feeding lines Xa, Xb. Only the length of the harness 51 is fed.

Next, the F and R clamps 150 and 250
Thus, the electric wires 50 are respectively gripped. Next, Fig. 7
As shown in FIG. 5, the electric wire 50 is sandwiched and cut by a pair of cutters 201, and the electric wire (hereinafter referred to as “residual electric wire”) 50 gripped by the F clamp 150 and the electric wire gripped by the R clamp 250 (hereinafter “ (Referred to as a “cut wire”) 50.

Next, as shown in FIG. 8, the F clamp 15
The grip of the residual electric wire 50 by 0 is released, the pair of feeding rollers 119 and 120 rotate a small amount, and the residual electric wire 50 advances in the direction of the arrow P by a small amount (the amount corresponding to the amount of coating stripping of the residual electric wire 50). To do.

Next, the residual electric wire 5 is removed by the F clamp 150.
0 is gripped, and the covering portion on the downstream side of the residual electric wire 50 in the electric wire feeding direction P is cut by the pair of cutters 201. Then, in the cut state, as shown in FIG. 9 and FIG. 10, the length measuring unit 100 is driven in the arrow Q direction by the movement of the moving means 500 by an amount smaller than the coating stripping amount. As a result, the covering portion 61 on the downstream side of the position where the residual electric wire 50 is cut by the cutter 201 is separated from the remaining covering portion 62 without falling off from the core wire 52 (semi-strip processing). At this time, as described in the conventional example, the covering portion 61 on the end side adheres to the cutter 201 by the pushing force of the cutter 201.

Therefore, in this embodiment, thereafter, as shown in FIG.
As shown in FIG. 5, the residual electric wire 50 is advanced a small amount in the arrow P direction by the movement of the length measuring unit 100 to separate the end side covering portion 61 attached to the cutter 201 from the cutter 201. In this way, the covering portion 61 is attached to the cutter 2
After separating from 01, the cutter 201 is opened as shown in FIG. 12, whereby the covering portion 61 is prevented from following the cutter 201 when the cutter 201 is opened, and the bending of the core wire 52 is prevented.

After that, as shown in FIG. 13, the length measuring unit 100 is retracted and the end side covering portion 61 is pulled out from between the pair of cutters 201.

Next, after the length measuring unit 100 moves in the direction of arrow R and the downstream end of the residual electric wire 50 is transferred to the front of the twisting unit 300, as shown in FIG. Moving forward, the downstream end of the residual electric wire 50 is inserted between the pair of files 301.

Next, the semi-striped end side covering portion 61 of the residual electric wire 50 is sandwiched by a pair of files 301 (see FIG. 6), and the upper side file 301 and the lower side file 301 are moved to the right S. 15 and the left direction R respectively, as shown in FIG.
Is driven backwards. As a result, as shown in FIG.
The core wire 52 is twisted and twisted together with the covering portion 61 on the end portion side of the residual electric wire 50, and the covering portion (strip residue) 61 on the end portion side is extracted from the core wire 52.

Subsequently, as shown in FIG. 17, the length measuring unit 100 is moved in the left direction R so that the downstream end of the residual electric wire 50 has the flux tank 3 of the flux unit 350.
It is arranged above 51, and as shown in FIG. 18, the feeding unit 102 of the length measuring unit 100 is depressed by the backward drive of the cylinder 108.

Next, as shown in FIG. 19, the F clamp 1
After the residual electric wire 50 is released from the grip of the residual electric wire 50, the pair of feed rollers 119 and 120 rotate by a predetermined amount, and the core wire 52
The tip of the is immersed in the flux solution 353. Subsequently, as shown in FIG. 20, the feed rollers 119 and 120 rotate in the reverse direction, the residual electric wire 50 retracts, and the core wire 52 is pulled up from the flux solution 353.

Next, as shown in FIG. 21, the feeding section 10
2 is returned to the horizontal position by the advancing drive of the cylinder 108, and the length measuring unit 100 moves to the left direction R as shown in FIG.
Then, the downstream end of the residual electric wire 50 is transferred to above the solder bath 404 of the hand unit 400.

Next, as shown in FIG. 23, the length measuring unit 1
24 and 25 after the feeding unit 102 of 00 is prone.
As shown in FIG. 5, the residual electric wire 50 advances and retreats due to the rotational driving of the feeding rollers 119 and 120, and the solder liquid 40 is applied to the core wire 51.
3a is attached. Thereafter, as shown in FIG. 26, the feeding unit 102 of the length measuring unit 100 is returned to the horizontal posture, and then the length measuring unit 100 returns to the original position shown in FIG.

On the other hand, while the twisting process, the flux applying process and the solder adhering process are being performed on the downstream end of the residual electric wire 50, the R clamp 250 is moved by the moving means 550 in a small amount in the backward direction Q (of the cut electric wire). It moves by an amount (corresponding to the amount of coating stripping at the upstream end) with respect to the wire feeding direction P). As a result, the upstream end of the cut electric wire gripped by the R clamp 250 is fed between the pair of cutters 201.

Next, the covering portion at the upstream end of the cut electric wire is cut by the pair of cutters 201, and the R clamp 250 is more than the amount of covering stripped on the upstream side of the cut electric wire in the cut state. It moves in the forward direction P by a long amount, and the covering portion at the upstream end of the cut wire is peeled off.

Next, the R clamp 250 moves rightward S, and the terminal crimping unit 450 crimps the terminal 53 (see FIG. 27) to the upstream coating stripping portion of the cut wire.

Then, the cut wire is discharged to a predetermined wire discharge portion by discharge means (not shown), and the R clamp 250 returns to the original position shown in FIG. In this way, the terminal 53 is crimped to one end of the wire discharge portion, and the coating portion of the other end is peeled off and twisted.
The harness 51 to which 03 is attached (see FIG. 27) is ejected.

By repeating such an operation continuously, two harnesses 51 are sequentially manufactured.

[0046]

As described above, according to the electric wire semi-strip method of the present invention, the electric wire is retracted in a state of being cut by a cutter, and after the end side covering portion is separated from the remaining covering portion, Since the wire is moved forward by a predetermined amount, the coating on the end side attached to the cutter will be pulled away from the cutter when the wire is retracted, so the wire will follow the cutter when the cutter is subsequently opened. It is possible to prevent the core wire from being bent.

[Brief description of drawings]

FIG. 1 is a schematic configuration view showing a harness manufacturing apparatus to which an electric wire semi-strip method according to an embodiment of the present invention can be applied.

FIG. 2 is a side view showing a length measuring unit of the harness manufacturing apparatus.

FIG. 3 is a sectional view taken along line III-III in FIG.

4 is a sectional view taken along line VI-VI of FIG.

FIG. 5 is a perspective view of a main part of the harness manufacturing apparatus.

FIG. 6 is a perspective view of a main part showing a file unit of the harness manufacturing apparatus.

FIG. 7 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 8 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 9 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 10 is an enlarged side view for explaining the operation of the harness manufacturing apparatus.

FIG. 11 is an enlarged side view for explaining the operation of the harness manufacturing apparatus.

FIG. 12 is an enlarged side view for explaining the operation of the harness manufacturing apparatus.

FIG. 13 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 14 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 15 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 16 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 17 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 18 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 19 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 20 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 21 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 22 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 23 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 24 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 25 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 26 is a schematic cross-sectional view for explaining the operation of the harness manufacturing apparatus.

FIG. 27 is a perspective view showing a harness manufactured by the harness manufacturing apparatus.

FIG. 28 is a perspective view of relevant parts showing a conventional electric wire semi-strip device.

FIG. 29 is a side view of essential parts showing the conventional semi-strip device.

FIG. 30 is a side view of essential parts showing the conventional semi-strip device.

FIG. 31 is a side view of essential parts showing the conventional semi-strip device.

FIG. 32 is a perspective view of an essential part showing a conventional core wire twisting device.

FIG. 33 is a side view for explaining the problems of the conventional semi-strip device.

[Explanation of symbols]

 50 Electric Wire 61 End-Side Covering Part 62 Remaining Covering Part 201 Cutter

Claims (1)

[Claims] 1. The electric wire is retracted by a predetermined amount by moving the clamp away from the pair of cutters in a state where the covering portion of the electric wire end portion grasped by the clamp is cut by the pair of cutters, and the electric wire is retracted by a predetermined amount. In the semi-strip method of the electric wire, which is configured to open the pair of cutters after separating the covering portion on the electric wire end portion side from the cutting position of the pair of cutters from the remaining covering portion, and the covering on the electric wire end portion side. After separating the part from the remaining covering part and before opening the pair of cutters, the clamp is moved closer to the cutter to advance the electric wire by a predetermined amount and adhere to the cutter when the electric wire retracts. A method of semi-stripping an electric wire, characterized in that the covering portion on the end portion side is separated from the cutter.