JPH088733B2 - Stripping method for intermediate stripping device of electric wire - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for stripping an electric wire used in manufacturing a harness or the like in an intermediate strip device.

(Prior Art) In recent years, many intermediate strip devices have been proposed in which the covering portion of the intermediate portion of an electric wire is peeled off.

The most general configuration of this device is, as shown in FIGS. 8 and 9, a pair of cutting cutters 2 (FIG. 8) for making a cut in the outer periphery of the covering portion of the electric wire 1 and the electric wire 1. A pair of slitting cutters 3 (FIG. 9) for forming slit-shaped slits along the longitudinal direction of the electric wire 1 in the covering portion, and an electric wire moving means that holds the electric wire 1 and is movable in a predetermined direction. (Not shown).

Then, as shown in FIG. 8, first, the electric wire 1 is held at a predetermined position by the electric wire moving means, and then the outer circumference of the covering portion at one end position of the intermediate strip area of the electric wire 1 is cut by the cutting cutter 2 to make a cut. Form part 4. Next, the electric wire 1 is moved to the position of the slitting cutter 3 by the electric wire moving means, and as shown in FIG. 9, the tip of the slitting cutter 3 is opposed to one end side of the intermediate strip region of the electric wire 1. Thereafter, the covering portion on one end side of the intermediate strip area is cut by the slitting cutter 3, and the electric wire 1 is moved in the arrow P direction along the longitudinal direction in the cut state, whereby the covering portion of the intermediate strip area is formed. 2 from the one end side to the other end side
A slit-shaped slit groove 5 (shown by diagonal lines) is formed in the book.

Subsequently, as shown in FIG. 10, the electric wire 1 is returned to the position of the cutting cutter 2 again, and the covering portion at the other end position of the intermediate strip region is cut by the cutting cutter 2. Next, in this cut state, that is, with the cut cutter 2 locking the covering portion on the other end side of the intermediate strip region, the wire moving means moves the wire 1 in the direction of the arrow Q along its longitudinal direction. To move. As a result, as shown in FIG. 11, the covering portion (strip dregs 7) in the intermediate strip region is torn at the portion of the cut groove 5 and peeled off from the core wire 6.

(Problems to be solved by the invention) However, in the above-described conventional stripping method, as shown in FIG. 10, the electric wire 1 is moved in the state in which the notch cutter 2 is locked to the other end of the intermediate strip region. When it is moved in the direction of the mark Q, the strip residue 7 is torn at the portion of the tear groove 5 and temporarily bent as shown in FIG. At this time, an elastic restoring force against the pushing force of the cutting cutter 2 is generated in the strip waste 7, so that the tip of the strip waste 7 may enter between the cutter 2 and the core wire 6 due to this elastic restoring force. When the tip of the strip residue 7 enters between the cutter 2 and the core wire 6 in this way, it is no longer possible to expect good stripping treatment of the intermediate strip region. For example, as shown in FIG. 12, when the tip of the strip dregs 7 enters between the upper cutter 2 and the core wire 6, the electric wire 1 is relatively pushed downward, so that the core wire 6 is lower. 2. Damaged by 2, or core wire 6 in some cases
May be disconnected.

(Object of the Invention) The present invention solves the above-mentioned problems of the prior art and provides a method of stripping a coating in an intermediate stripping device for an electric wire, which is capable of stripping the intermediate strip region while preventing damage or cutting of the core wire. The purpose is to provide.

(Means for Solving the Problem) The present invention relates to an electric wire moving means for moving an electric wire along the longitudinal direction thereof, a cutting cutter for cutting the outer circumference of a covering portion of the electric wire, and a covering of the electric wire. A method for stripping a coating in an intermediate stripping device for an electric wire, comprising: a cutting cutter for tearing a portion along the longitudinal direction, in order to achieve the above object, with respect to the longitudinal direction of the intermediate strip area of the electric wire. A step of forming a first cut portion by the cut cutter at a position displaced by a predetermined amount in one direction from an end position on the one direction side, and the other direction side with respect to the longitudinal direction of the intermediate strip region of the electric wire. Forming a second notch with the notch cutter at a position displaced by a predetermined amount from the end position of the wire, and from the first notch to the second notch of the covering portion of the electric wire. The cutting cutter And a step of forming a tear groove with a wire, the wire is moved by the wire moving means in a state where the other end of the wire in the intermediate strip region is cut by the cutting cutter. By moving to the other direction side, the covering portion between the first cut portion and the second cut portion is peeled off.

(Embodiment) FIG. 1 is a perspective view showing a harness manufacturing apparatus to which a coating stripping method according to an embodiment of the present invention can be applied, FIG. 2 is its side view, FIG. 3 is its plan view, and FIG. The figure is a perspective view of the main part. As shown in these figures, this device includes an electric wire feeding means 50 for intermittently feeding two electric wires 600a and 600b simultaneously, a cutter section 100, and an electric wire 600a that is movable in three-dimensional directions. It is provided with first and second clamp means 250 and 350 capable of gripping and releasing 1,600b, first and second terminal crimping means 400 and 500, and discharging means 550. In this device, as shown in FIG. 5, the terminals 602 are crimped to both ends, and the covering portion of the intermediate strip region is peeled off to remove the core wire 603.
The two exposed harnesses are manufactured one by one.

That is, the electric wire feeding means 50 includes the electric wire feeding lines Xa, X.
A pair of conveying units 51, 51 are provided above and below with b interposed therebetween, and both conveying units 51, 51 are configured to be swingable around the rotation shafts of the length measuring rollers 52, 52 pivotally connected to one ends thereof. To be done. Then, the electric wires are swung so that the two electric wires 600a, 600b are sandwiched by the feeding rollers 53, 53 pivotally connected to the other ends of the electric wires 51, 51, respectively. When the feeding motor 60 (Fig. 3) is driven, both feeding rollers 53, 53 rotate in mutually opposite directions, and the two electric wires 600a, 600b simultaneously move along the electric wire feeding lines Xa, Xb. It is configured to be fed in the direction of the mark P.

The first and second clamp means 250, 350 respectively support the first and second clamps 200, 300 capable of gripping and releasing the electric wires 600a, 600b and the first and second clamps 200, 300 for supporting the first and second clamps 200, 300 respectively in a three-dimensional direction. And second clamp moving means 251, 351. First and second
In the clamp moving means 251, 351, the left and right moving portions 202, 302 are supported by the bases 201, 301 so as to be movable in the left and right directions indicated by the arrows R, S, and the left and right moving portions 202, 302 have forward and backward moving portions 203, 303 respectively by the arrows P, Q. Each is supported so as to be movable in the front-back direction shown in FIG. Further, the first and second clamps 200, 300 are supported by the front-rear moving parts 203, 303 so as to be able to move up and down in the vertical direction indicated by the arrows T, U. In addition, the left and right moving unit 202,
302 is a motor 204, 30 mounted on the base 201, 301, respectively
It is configured to move in the left-right direction via the power transmission mechanisms 204a and 304a when the 4 is driven. Further, the front-rear moving units 203 and 303 are configured to move in the front-rear direction by driving a motor (not shown). The second clamp 300 is configured to move up and down in the vertical direction by driving a cylinder 305 arranged between the clamp 300 and the one-side front-rear moving portion 303.

As shown in FIG. 4, the first clamp 200 is formed with electric wire insertion holes 210, 210 through which electric wires 600a, 600b fed along the electric wire feeding lines Xa, Xb can be inserted, respectively. The electric wires 600a and 600b passing through the insertion holes 210 and 210 can be grasped and released, respectively.

The second clamp 300 corresponds to the two electric wires 600a and 600b, respectively, and has two substantially L-shaped fixed claws 306 and 306 arranged facing each other, and electric wires are fed to the horizontal portions of the fixed claws 306 and 306, respectively. It has movable claws 307, 307 mounted so as to be movable back and forth in the left-right direction orthogonal to the lines Xa, Xb, and cylinders 308, 308 for driving the movable claws 307, 307 forward and backward respectively. The movable claws 30 are driven by driving the cylinders 308, 308 with the electric wires 600a, 600b arranged between the vertical portions of the fixed claws 306, 306 and the movable claws 307, 307, respectively.
When 7,307 advance respectively, fixed claw 306,306 and movable claw 30
The electric wires 600a and 600b are gripped by 7,307 and the electric wires 600a and 600b when the movable claws 307 and 307 retract.
Is configured to be released.

FIG. 6 shows a front view of the cutter unit 100. As shown in the figure, the cutter unit 100 includes a cutter body 101 having a wire insertion opening 102 formed in the center, and a pair of cutting / cutting cutters vertically arranged with the wire feeding lines Xa and Xb interposed therebetween. 103,
103, a first driving unit 104 for driving the cutting / cutting cutters 103, 103 to open and close, and a pair of upper and lower slitting cutters 153, 153 arranged in line with the cutting / cutting cutters 103, 103.
And a second drive unit 154 for driving the split cutter 153 to open and close.

The ball screw 105 of the first driving unit 104 has a right-hand threaded region 105a engraved on the outer periphery of the upper portion and a left-handed screw region 105b engraved on the outer periphery of the lower portion. The ball screw 105 is rotatably supported by the cutter body 101 via bearings 106 so that the upper and lower ends thereof are arranged so that the axial direction thereof is arranged along the vertical direction. Further, the rotation drive shaft of the servo motor M1 is connected to the lower end of the ball screw 105, and the servo motor M1NO
The rotational force of the rotary drive shaft is transmitted to the ball screw 105. In addition, cutting and cutting cutters 103,103
The brackets 107, 107 to which are attached are respectively screwed to the right screw region 105a and the left screw region 105b of the ball screw 105 in a state in which the rotation around the vertical axis is restricted. Then, as described above, when the ball screw 105 rotates,
The brackets 107, 107 screwed into the right-hand threaded region 105a and the left-handed screw region 105b are driven toward and away from each other along the axial direction of the ball screw 105 according to the rotation direction of the ball screw 105, thus making a pair of cutting / cutting. The cutters 103, 103 are configured to be opened and closed.

On the other hand, the side of the slitting cutter 153 is also configured in substantially the same manner. That is, the ball screw 155 is attached to the cutter body 101.
Are rotatably supported via bearings 156, and brackets 157 and 157 to which two cutting cutters 153 and 153 are attached are respectively provided with right screw regions 155a and 155a of the ball screw 155 in a state in which rotation around the vertical axis is restricted. The left screw area 155b is screwed. Then, the brackets 157, 157 are brought into contact with and separated from each other by the driving of the servomotor M2, and the split cutters 153, 153 are opened and closed.

As shown in FIGS. 1 to 3, the discharging means 550 is
A pillar 551, a rail 552 fixed to the upper end of the pillar 551 and arranged in the left-right direction indicated by the arrows R and S, and a discharge clamp 553 movably supported by the rail 552 along the rail longitudinal direction. With. Then, the discharge clamp 553 is moved in the left-right direction along the rail 552 by the driving of a driving means (not shown), and the discharge clamp 553 can simultaneously grasp and release two cut wires.

On the other hand, in this harness manufacturing apparatus, each of the drive units 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. The operation is performed.

Next, the operation of this harness manufacturing apparatus will be described with reference to FIGS. 7A to 7A.
Description will be given based on the operation explanatory diagram of FIG. The first and second clamps 200, 300 before the start of operation are arranged on the electric wire feeding lines Xa, Xb, respectively, and the electric wires 600a,
The grip on 600b is released, and the cutting / cutting cutter 103 and the tearing cutter 153 are open.
Further, the discharge clamp 553 of the discharge means 550 is the arrow R in FIG.
The electric wire holding is released at the position moved to the right as shown in.

From this state, as shown in FIG. 7A, the wire feeding means 50
Of the ball feeding rollers 53, 53 rotate while nipping the electric wires 600a, 600b, respectively, and the electric wires 600a, 600b are fed by the electric wire feeding lines Xa, Xb.
A predetermined amount is fed in the direction of the arrow P along the line (only one side of the electric wire 600a is shown in FIG. 7A. The same applies to FIGS. 7B to 7S.) Next, as shown in FIG. 7B The feeding rollers 53, 53 release the nipping between the electric wires 600a, 600b and the first and second clamps 200, 300
600b is gripped. As a result, as shown in FIG. 7C, at the position Px ₁ which is shifted in the arrow P direction by a predetermined amount Δx from the downstream end position Px with respect to the wire feeding direction P in the intermediate strip region of the wires 600a and 600b. Correspondingly, the tips of the cutting / cutting cutters 103 are arranged respectively.

Next, as shown in FIG. 7D, the cutting / cutting cutter 103
Thus, the electric wires 600a and 600b are cut so as to be sandwiched, and a first cut portion 610 is formed at a position indicated by Px ₁ .

Next, in this cut state, as shown in FIG. 7E, the first and second clamps 200 and 300 move in the arrow P direction by a small amount. As a result, the covering portion on the upstream side of the cut position is compressed while being separated from the covering portion on the downstream side of the cutting position, and a gap E is formed between the covering portions.

Next, after the cutting / cutting cutter 103 is opened, the 7th floor
As shown in the figure, the first and second clamps 200 and 300 move to the right as indicated by arrow R, respectively. As a result, the tips of the slitting cutters 153 are arranged corresponding to the above-mentioned gap E between the electric wires 600a and 600b.

Subsequently, as shown in FIGS. 7G and 7H, the slitting cutter 153 is closed and the tip of the slitting cutter 153 is inserted into the gap E. In this state, as shown in FIG. 7I, the first and second clamps 200 and 300 are respectively advanced in the arrow P direction. As a result, as shown in the plan view of FIG. 7J, two slits are provided from the vicinity of the position Px ₁ to the position Qx ₁ shifted in the arrow P direction by the predetermined amount Δx from the upstream end position Qx of the intermediate strip area. The cut grooves 620 each have a shape.

Next, after the cutting cutter 153 is opened, as shown in FIG. 7K, the first and second clamps 200 and 300 are moved to the left as shown by arrow S, and the electric wires 600a and 600b are respectively fed. It is arranged on the supply lines Xa and Xb. As a result, as shown in FIG. 7L, the tips of the cutting / cutting cutters 103 are arranged corresponding to the positions indicated by Qx ₁ of the electric wires 600a and 600b. Then, as shown in FIG. 7M,
The cutting / cutting cutter 103 is closed and the electric wires 600a, 600b
A second cut 630 is formed at the position indicated by Qx ₁ . In this cut state, as shown in FIG. 7N, the first and the second
The clamps 200 and 300 are moved backward by a predetermined amount as shown by arrow Q. As a result, the covering portion on the downstream side of the cutting position is separated from the covering portion on the upstream side of the cutting position.

Next, as shown in FIG.
After the opening, the first and second clamps 200 and 300 move forward in the arrow P direction by a predetermined amount. As a result, as shown in FIG. 7P, the tips of the cutting / cutting cutters 103 are arranged corresponding to the upstream end positions Q _X of the intermediate strip regions of the electric wires 600a and 600b.

Then, as shown in Fig. 7Q, a cutting / cutting cutter
103 is closed, and the cutter 103 cuts the electric wire 600a, 600
The coating of b is cut at position Qx.

Next, in the cut state, the first and second clamps
200,300 moves in the direction of arrow Q. As a result, as shown in FIG. 7R, the covering piece 64 located between the two cutting positions Qx, Qx ₁ is
0 is being pressed by the cutting / cutting cutter 103, and the core wire 60
Move along arrow 3 in the direction of arrow P. as a result,
The strip dregs 650 formed with the cut groove 620 is the covering piece 640.
Is pushed in the direction of the arrow P, the strip shavings 650 are torn at the cut groove 620 and temporarily bent.
At this time, an elastic restoring force against the pushing force of the covering piece 640 is generated in the strip dregs 650, so that the covering piece 640 receives a force in the direction of being pushed back toward the cutting / cutting cutter 103. However, the covering piece 640 has a cylindrical shape, and the force acting on the cutting / cutting cutter 103 from the covering piece 640 is the arrow Q direction which is orthogonal to the opening / closing direction of the cutting / cutting cutter 103. Therefore, the end of the covering piece 640 does not enter between the cutting / cutting cutter 103 and the core wire 603. Of course, the end portion of the strip residue 650 does not enter between the covering piece 640 and the core wire 603. Therefore, during the stripping process of the strip dregs 650, the core wire 603 is not displaced relative to the vertical direction, and damage or cutting of the core wire 603 by the cutting / cutting cutter 103 can be prevented.

Thus, as shown in Fig. 7S, the cutting / cutting cutter
When the covering piece 640 is pushed by the 103 to the first cut portion 610 (cut position Px ₁ ), the strip dregs 650 is dropped from the core wire 603.

In addition, the covering piece 640 having a length of Δx is the first cut portion 610.
By being transferred to the side, the core wire 603 is accurately exposed in the middle strip area of the electric wires 600a and 600b.

After that, the end cutting process of the electric wires 600a and 600b and the terminal crimping process are sequentially performed.

That is, from the state shown in FIG. 7S, the electric wires 600a and 600b are released from the first and second clamps 200 and 300, and the electric wires 600a and 600b are clamped by the feeding rollers 53 and 53, and the electric wire feeding line Xa. , Xb in the direction of arrow P.

Next, the electric wires 600a, 600b are connected to the first and second clamps 200, 3
The wire is gripped again by 00, and the wire 600a, 600b is released by the feeding rollers 53, 53, and then the wire 600a, 600b is cut by the cutting / cutting cutter 103 (wire end cutting processing). ). After that, the first clamp 200
Moves a small amount in the direction of arrow P, and the cutting / cutting cutter 103 cuts the entire circumference of the covering part of the downstream end of the electric wire (hereinafter referred to as “residual electric wire”) 600a, 600b gripped by the first clamp 200. Get caught. And the first clamp 200 with the cut state
Moves backward in the direction of arrow Q, and
The coating on the downstream end of 0a, 600b is stripped. Subsequently, the first clamp 200 moves to the right as shown by the arrow R, and the two residual electric wires 600a, 60 are moved by the first terminal crimping means 400.
The terminals 602, 602 are crimped to the downstream stripped ends of 0b, respectively. After that, the first clamp 200 moves to the left as shown by the arrow S and returns to the original position shown in FIG.

On the other hand, the terminal 602 is attached to the stripped end on the downstream side of the residual electric wires 600a and 600b.
While the wire is being crimped, the covering portion at the upstream end of the electric wire (hereinafter, referred to as “cut electric wire”) 600a, 600b gripped by the second clamp 300 is peeled off.

Next, the second clamp 300 moves to the left as shown by the arrow S, and the second terminal crimping means 500 causes the two cut wires 600a and 60a to be cut.
Terminals are crimped to the upstream stripped end of 0b.

After that, the two cut wires 600a and 600b are gripped by the discharge clamp 553 and the grip by the second clamp 300 is released, respectively, and the cut wires 600a and 600b are delivered from the second clamp 300 to the discharge clamp 553.
Subsequently, the discharge clamp 553 moves along the rail 552 in the leftward direction indicated by the arrow S, and then the cut electric wires 600a and 600b are released from the grips and discharged to the electric wire discharging portions (not shown).

On the other hand, the second clamp 300, which has delivered the cut wires 600a and 600b to the discharge clamp 553, is moved rightward as indicated by the arrow R and returns to the original position shown in FIG.

By repeating such an operation continuously, the covering portion of the intermediate strip area is stripped off, and two harnesses (FIG. 5) in which the terminals 602 are crimped at both ends are manufactured in order.

In addition, in the harness manufactured in this way,
As shown in the figure, the covering piece 640 is held by the core wire 603 while being separated from the other covering portion 645. However, in the above harness, the end portion of another harness is usually crimped to the core wire 603 in a subsequent step, and a tape or the like is wound around the crimped portion. At that time, since the tape is also wound around the covering piece 640 at the same time, separation of the covering piece 640 does not pose a problem.

(Effect of the Invention) As described above, according to the coating stripping method in the wire intermediate stripping device of the present invention, the strip cutter is stripped by the slitting cutter while interposing the coating strip. The effect that the end of the covering piece can be prevented from entering between the cutting cutter and the core wire, and as a result, the covering stripping process of the intermediate strip area can be performed while preventing damage or cutting of the core wire by the cutting cutter. Is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a harness manufacturing apparatus for carrying out a coating stripping method according to an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a plan view thereof, and FIG. FIG. 5 is a perspective view showing a main part of the harness manufacturing apparatus of the embodiment, FIG. 5 is a front view showing a main part of the harness manufacturing apparatus, and FIGS. 7A to 7S. Are diagrams for explaining the operation of the above harness manufacturing apparatus, and FIGS. 8 to 12 are side views showing the operation of the conventional wire intermediate stripping apparatus. 103 …… Cutting / notching cutter, 153 …… Cleaving cutter, 20
0,300 …… Clamp, 600a, 600b …… Wire, 610,630 ……
Notches, 620 ...... switching cleft, 620 ...... switching fissures, Px, end position of the Qx ...... intermediate strip region, Px _1, Qx ₁ ...... cutting position

 ─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-63-287312 (JP, A) JP-A-1-8812 (JP, A) JP-A-2-206314 (JP, A) JP-A-3- 8217 (JP, A) JP-A-4-38107 (JP, A) US Patent 3363309 (US, A) US Patent 3748932 (US, A)

Claims (1)

[Claims] 1. An electric wire moving means for moving an electric wire along its longitudinal direction, a cutting cutter for cutting an outer circumference of a covering portion of the electric wire, and a covering portion of the electric wire for cutting along the longitudinal direction. In an intermediate strip device for an electric wire having a slitting cutter for splitting, the cut is provided at a position displaced by a predetermined amount in one direction from an end position on one side with respect to the longitudinal direction of the intermediate strip region of the electric wire. A step of forming a first cut portion by a cutter, and a step of forming a first cut portion by the cut cutter at a position shifted by a predetermined amount in one direction from an end position on the other direction side with respect to the longitudinal direction of the intermediate strip region of the electric wire. After performing the step of forming two notches, and the step of forming the notch with the notch cutter from the first notches to the second notches of the covering portion of the electric wire, the notch cutter By the above By moving the electric wire to the other direction side by the electric wire moving means in a state where the other end side position of the intermediate strip region of the wire is cut, the first cut portion and the second cut portion. A method of stripping a coating in an intermediate stripping device for an electric wire, characterized by stripping a coating portion between the portions.