JP2826683B2 - Method for forming a cleavage groove in an intermediate strip device for electric wires - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a cut groove in an intermediate strip device for an electric wire used in manufacturing a harness or the like.

[0002]

2. Description of the Related Art Many intermediate strip devices have been proposed in recent years for stripping a covering portion of an intermediate portion of an electric wire.

[0003] FIGS. 17 and 18 show a schematic side view of such an intermediate strip device. In this intermediate strip device, the electric wire 10 can be freely gripped and released, and
0, a first and a second clamps 1 and 2 which are respectively movable in a two-dimensional direction on a horizontal plane including an arrangement line
And a pair of upper and lower cutting cutters 3 (FIG. 17) for cutting the outer periphery of the covering portion 0, and are arranged on the sides of the cutting cutters 3,
There is provided a pair of upper and lower cutting cutters 4 (FIG. 18) for cutting a covering portion of the electric wire 10 along the longitudinal direction of the electric wire 10 to form a slit-shaped slit.

In this apparatus, the electric wire 10 is held by the first and second clamps 1 and 2 as shown in FIG. The cut portion 11 is formed by sandwiching the covering portion at one end of the intermediate strip region 10 with the cutting cutter 3.

[0005] Next, as shown in FIG.
By moving the wire 2, the electric wire 10 is moved to the position where the cutting cutter 4 is mounted, and the tip of the cutting cutter 4 is made to correspond to one end of the intermediate strip region of the electric wire 10. Thereafter, the covering portion on one end side of the intermediate strip region is cut by the cutting cutter 4, and the first and second clamps 1 and 2 are moved in the direction of the arrow Q while holding the electric wire 10, whereby the intermediate strip region is moved. Upper and lower two slit-shaped slit grooves 12 are formed in the covering portion from one end side to the other end side.

Thereafter, the electric wire 10 is returned to the mounting position of the cutting cutter 3 again by the movement of the clamps 1 and 2, and the cutting cutter 3 cuts the cut portion (shown in the drawing) on the other end side of the intermediate strip area. (Omitted).

As described above, the notches 11 are formed at both ends of the intermediate strip region, and the slit-like slits 12 are formed between both the notches 11, and then the intermediate strip is removed by, for example, a cover dropping means (not shown). The covering part of the area is dropped off.

[0008]

However, in the conventional intermediate stripping apparatus, when the electric wire 10 is cut by a pair of upper and lower cutting cutters 3 as shown in FIG. The electric wire 10 is pushed and bent, and the electric wire 10 extends between the two clamps 1 and 2 or the electric wire 10 is drawn out to the clamps 1 and 2 and the empty cutter 3, so that the slack of the electric wire 10 is reduced by the two clamps 1 and 2.
Occurs between the two. With the slack formed in this way,
As shown in FIG. 20, when the electric wire 10 is cut by the pair of cutting cutters 4, a poor cutting occurs on the upper surface side of the electric wire 10 due to insufficient cutting into the covering portion of the upper cutting cutter 4, while the electric wire 10 is cut. 10 is a lower side cutter 4 on the lower side.
There is a possibility that the core wire 10a may be damaged or cut due to excessive cutting into the covering portion.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and is directed to an intermediate strip device for an electric wire capable of forming a cut groove while preventing a defective cutting of a covering portion, damage and cutting of a core wire. An object of the present invention is to provide a method for forming a cleavage groove.

[0010]

SUMMARY OF THE INVENTION According to the present invention, there are provided a first and a second clamp capable of grasping and releasing an electric wire and movable at least along the longitudinal direction of the electric wire, and the electric wire sandwiching the electric wire. A pair of cutting cutters for cutting the outer periphery of the covering part, and a cutting cutter for cutting the covering part of the electric wire along a longitudinal direction of the electric wire, wherein the intermediate strip device of the electric wire, In order to achieve this, in a state where the electric wire is gripped by the first and second clamps, at least one of one end and the other end of the intermediate strip region of the electric wire between the two clamps is cut by the cutting cutter. A first step of forming a cut portion by cutting in accordance with at least one of the first and second clamps after the first step is completed. By one of the clamp is moved along the longitudinal direction of the electric wire, the first and second
A second step of linearly spanning the intermediate strip region of the wire with the clamps relatively spaced apart from each other;
After the step is completed, in a state where the cutting cutter is inserted into the covering portion on one end side of the intermediate strip region of the electric wire,
By moving the first and second clamps along with the electric wire along the longitudinal direction thereof, the intermediate strip region of the electric wire is cut from one end side to the other end side to form a slit-shaped slit groove. 3 steps.

[0011]

According to the method for forming a cleavage groove in the intermediate strip device for an electric wire of the present invention, the first and second clamps are relatively separated from each other to stretch the intermediate strip region of the electric wire linearly. Since the intermediate strip area is cut by the cutting cutter to form a slit groove, the electric wire is cut by the cutting cutter in a state where the slack of the electric wire is removed, and the electric wire of the cutting cutter at the time of the cutting is cut. The depth of cut into the wafer is kept good.

[0012]

FIG. 1 is a perspective view showing a harness manufacturing apparatus to which a method for forming a cut groove according to an embodiment of the present invention can be applied.
Is a side view of the device, FIG. 3 is a plan view of the device, and FIG. 4 is a perspective view of a main part of the device. As shown in these figures, the apparatus includes an electric wire feeding means 50 for simultaneously and intermittently feeding two electric wires 600a and 600b, respectively.
First and second clamping means 250 and 350 which are movable in three-dimensional directions and which can grip and release the electric wires 600a and 600b respectively;
Terminal crimping means 400 and 500, and a discharging means 550. In this apparatus, as shown in FIG. 5, the terminals 602 are crimped to both ends, the covering portion of the intermediate strip region is peeled off, and the harnesses in which the core wires 603 are exposed are sequentially manufactured two by two. .

First, the electric wire feeding means 50 is provided with a pair of conveying parts 51, 51 vertically above and below the electric wire feeding lines Xa, Xb, and both of the conveying parts 51, 51 are respectively pivotally connected to one end thereof. The length measuring rollers 52, 52 are configured to be swingable about the rotation axis thereof. And both transport units 5
Feed rollers 53 pivotally connected to the other ends of
When the electric wire feeding motor 60 (see FIG. 3) is driven in a state where the two conveying portions 51, 51 are swung so as to sandwich the two electric wires 600a, 600b by 53, the two feeding rollers 53, 5 are driven.
3 rotate in opposite directions to each other, and the two electric wires 600a, 6a
00b is simultaneously supplied in the direction of arrow P along the electric wire supply lines Xa and Xb.

First and second clamping means 250, 3
Reference numeral 50 denotes first and second clamps 200 and 300 capable of gripping and releasing the electric wires 600a and 600b, respectively, and first and second clamps 50 that respectively support the first and second clamps 200 and 300 so as to be movable in a three-dimensional direction. Second clamp moving means 251 and 351 are provided. In the first and second clamp moving means 251, 351, the base 2
01 and 301 respectively support left and right moving parts 202 and 302 movably in the left and right directions indicated by arrows R and S, respectively. Each is supported movably in the front-rear direction shown by Q. Further, the first and second clamps 200 and 300 are supported by the front and rear moving parts 203 and 303 so as to be vertically movable as indicated by arrows T and U. Also,
The left and right moving units 202 and 302 are configured to move in the left and right directions via power transmission mechanisms 204a and 304a when driven by motors 204 and 304 attached to the bases 201 and 301, respectively. 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 includes a cylinder 3 disposed between the clamp 300 and the front-rear moving unit 303 on one side.
05 is driven up and down by driving.

As shown in FIG. 4, the first clamp 200
Are formed with electric wire insertion holes 210, 210 through which the electric wires 600a, 600b fed along the electric wire feed lines Xa, Xb can be inserted, respectively, and the electric wires passing through the insertion holes 210, 210 are formed. The configuration is such that each of 600a and 600b can be gripped and released.

The second clamp 300 includes two electric wires 60.
0a, 600b, respectively, and two substantially L-shaped fixing claws 306, 306 arranged opposite to each other, and an electric wire feeding line X on each horizontal portion of the fixing claws 306, 306.
a movable claws 307, 307 mounted to be able to advance and retreat in the left-right direction orthogonal to a and Xb, and movable claws 307, 307
Cylinders 308, 308 for driving the
And Then, in a state where the electric wires 600a, 600b are respectively arranged between the vertical portions of the fixed claws 306, 306 and the movable claws 307, 307, the cylinder 3
08, 308 to drive the movable claws 307, 30
7 advance, the fixed claws 306, 306 and the movable claws 307, 307 respectively grip the electric wires 600a, 600b, and when the movable claws 307, 307 retreat, respectively, the electric wires 600a, 600b are respectively released. It is configured as follows.

FIG. 6 is a front view of the cutter unit 100.
As shown in the figure, a cutter unit 100 includes a cutter body 101 having an electric wire insertion opening 102 formed in the center, and a pair of cutting / cutting cutters arranged vertically above and below an electric wire feeding line Xa, Xb. 103, 103, a first driving unit 104 for opening and closing the cutting / cutting cutters 103, 103, and a pair of upper and lower cutting cutters 153 arranged to line up with the cutting / cutting cutters 103, 103. ,
153 and a second drive unit 154 for driving the cutting cutter 153 to open and close.

The ball screw 105 of the first drive unit 104
The right screw region 105a is engraved on the upper outer periphery and the left screw region 105b is engraved on the lower outer periphery.
The ball screw 105 is arranged so that its axial direction is along the vertical direction, and the upper and lower ends are respectively bearings 106.
And is rotatably supported by the cutter body 101 via the.
Further, the rotation drive shaft of the servo motor M1 is connected to the lower end of the ball screw 105, and the rotation force of the rotation drive shaft of the servo motor M1 is transmitted to the ball screw 105. Further, the cutting / cutting cutters 103, 103
Are attached to the brackets 107, 107, respectively.
In a state where the rotation about the vertical axis is restricted, the ball screw 105
Are screwed into the right screw region 105a and the left screw region 105b, respectively. Then, as described above, when the ball screw 105 rotates, the brackets 107 and 10 screwed into the right screw region 105a and the left screw region 105b.
The cutters 7 are driven to contact and separate from each other along the axial direction of the ball screw 105 in accordance with the rotation direction of the ball screw 105, and thus the pair of cutting / cutting cutters 103 are driven to open and close.

On the other hand, the side of the cutting cutter 153 is also configured substantially in the same manner as described above. That is, the cutter body 101
A ball screw 155 is rotatably supported via a bearing 156, and brackets 157, 157 are provided with two cutting cutters 153, 153 respectively.
Are the right-hand threaded area 155a and the left-handed thread area 1 of the ball screw 155 in a state where the rotation about the vertical axis is restricted.
55b. Then, the brackets 157, 157 come into contact with and separate from each other by driving the servo motor M2 in the same manner as described above, so that the cutting cutters 153, 153 are opened and closed.

As shown in FIG. 1 to FIG.
Reference numeral 50 denotes a support 551 and rails 55 fixed to the upper end of the support 551 and arranged along the left and right directions indicated by arrows R and S.
2 and a discharge clamp 553 supported on the rail 552 movably along the rail longitudinal direction. The discharge clamp 55 is driven by the driving means (not shown).
3 is configured to move in the left-right direction along the rail 552, and to simultaneously hold and release two cut electric wires described later by the discharge clamp 553.

In this harness manufacturing apparatus, each of the drive units is connected to control means (not shown), and the drive of each of the drive units is controlled based on an output signal from the control means. The operation as described is performed.

Next, the operation of the harness manufacturing apparatus will be described. It should be noted that the first and second operations before the operation is started.
Clamps 200 and 300 are respectively connected to the wire feed line X
a, Xb, and the electric wires 600a, 600, respectively.
In this state, the gripping of the cutter b is released, and the cutting / cutting cutter 103 and the cutting cutter 153 are opened. Further, the discharge clamp 553 of the discharge means 550 is in the wire holding release state at the position moved rightward as shown by the arrow R in FIG.

From this state, as shown in FIG. 7, the feeding roller 53 of the wire feeding means 50 rotates to rotate the wires 600a and 600a.
00b is fed by a predetermined amount in the direction of arrow P along the wire feed lines Xa and Xb (in FIG.
Only the a side is shown. The same applies to FIGS. 8 to 16. ).

Next, as shown in FIG.
After the rotation of 53 is stopped, the holding of the feeding rollers 53, 53 between the electric wires 600a, 600b is released, and the electric wires 600a, 600b are gripped by the first and second clamps 200, 300. As a result, the leading ends of the cutting / cutting cutters 103 are respectively arranged corresponding to the end positions on the upstream side in the wire feeding direction P in the intermediate strip region of the wires 600a and 600b.

Next, as shown in FIG.
00b is cut by the cutting / cutting cutter 103 so as to be sandwiched from above and below, so that a first cut portion 611 is formed.

At this time, the electric wires 600a and 600b are cut off.
It is pushed and bent along the tip inclined surface 103a of the cutting cutter 103, and the electric wire 600 is clamped between the clamps 200 and 300.
a, 600b are extended or the electric wires 600a, 60
0b is pulled out from each of the clamps 200, 300 toward the cutting / cutting cutter 103, and the electric wires 600a, 60
A slack of 0b will occur between the clamps 200 and 300.

Therefore, in this embodiment, the first cut portion 61
1 is formed, and then the second clamp 3 is formed as shown in FIG.
00 is moved in the direction of the arrow P along the electric wire feed lines Xa and Xb by a small amount to remove the slack of the electric wires 600a and 600b between the clamps 200 and 300. When the slack of the electric wires 600a, 600b is removed in this way, the clamps 200, 300 are maintained at the distance between them, and until the position where the cutting cutter 153 is disposed as shown in FIG. (To the right as shown in FIG. 12), as shown in FIG.
The cutting cutter 153 is inserted therein. In this state, as shown in FIG. 13, the first and second clamps 200 and 300 are respectively moved by a predetermined amount in the direction of arrow Q along the longitudinal direction of the electric wires 600a and 600b (the length corresponding to the length of the intermediate strip region). Only), two upper and lower slit-shaped slit grooves 620 are formed from the upstream end to the downstream end of the intermediate strip region. In this case, the electric wires 600a, 600b are connected to the first and second clamps 200,
Since it is stretched straight between 300, the covering portion of the intermediate strip region is torn with the cutting amount of the pair of cutting cutters 153 into the covering portion kept constant. For this reason, a defective cutting of the covering portion does not occur, and the contact of the cutting cutter 153 with the core wire 603 is prevented, so that the core wire 603 is also prevented from being damaged and cut.

Thereafter, the cutting cutter 153 is opened,
As shown in FIG. 14, the first and second clamps 200,
300 move leftward as shown by the arrow S, respectively, and the electric wires 600a and 600b become the electric wire supply lines Xa and X, respectively.
b. At this time, the tip of the cutting / cutting cutter 103 is arranged corresponding to the end position on the downstream side in the wire feeding direction P in the intermediate strip region of the wires 600a and 600b.

In this state, as shown in FIG. 15, the cutting / cutting cutter 103 is closed and the electric wires 600a, 600
A second cut portion 612 is formed in the coating portion at the downstream end in the intermediate strip region b.

In this way, as shown in FIG. 16, the first and second clamps 2 are cut in the state where the covering portions of the electric wires 600a and 600b are cut by the cutting / cutting cutter 103.
00 and 300 are respectively moved in the direction of arrow P to cover the intermediate strip area (strip waste 63).
0) is torn at the cleavage groove 620 and peeled off from the core wire 603.

Thereafter, the ends of the electric wires 600a and 600b are cut, and the terminals are crimped.

That is, from the state shown in FIG. 16, the electric wires 600a, 600 by the first and second clamps 200, 300 are used.
00b is released and the electric wire 600
a and 600b are nipped by the feeding rollers 53 and are fed in the direction of arrow P along the electric wire feeding lines Xa and Xb.

Next, the electric wires 600a, 600b are gripped again by the first and second clamps 200, 300, and the electric wires 600a, 600b are fed by the feed rollers 53, 53.
After the holding of the wire 600b is released, the wires 600a and 600b are cut by the cutting / cutting cutter 103 (the wire end cutting process). After that, the first clamp 200 advances a small amount in the direction of arrow P,
0 (hereinafter referred to as “residual electric wire”) 600
The entire periphery of the coating portion at the downstream end portions of a and 600b is cut by the cutting / cutting cutter 103. Then, as the first clamp 200 retreats in the arrow Q direction in the cut state, the coating portions at the downstream ends of the two residual electric wires 600a and 600b are peeled off. Then, the first clamp 2
00 moves rightward as shown by the arrow R, and the first terminal crimping means 400 crimps the terminals 602 and 602 to the downstream stripped ends of the two residual wires 600a and 600b, respectively. Thereafter, the first clamp 200 moves to the left as shown by the arrow S, and returns to the original position shown in FIGS.

On the other hand, while the terminal 602 is crimped to the downstream stripped ends of the residual electric wires 600a and 600b, the electric wires (hereinafter referred to as “cut electric wires”) 600a, The coating at the upstream end of 600b is similarly stripped.

Next, the second clamp 300 moves to the left as shown by the arrow S, and
Terminals are crimped to the upstream stripped ends of the cut electric wires 600a and 600b, respectively.

Thereafter, the two cut electric wires 600a, 600
b are respectively held by the discharge clamps 553 and the grips by the second clamps 300 are respectively released, so that the cut electric wires 600a and 600b are
00 to the discharge clamp 553. Subsequently, the discharge clamp 553 is moved along the rail 552 by an arrow S.
After moving to the left as shown in FIG.
Ob is released and discharged to an electric wire discharge unit (not shown).

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

Such an operation is continuously repeated,
A harness in which the covering portion of the intermediate strip area is peeled off and terminals 602 are crimped to both ends (see FIG. 5).
Are sequentially manufactured two by two.

As described above, according to this harness manufacturing apparatus, after removing the slack of the electric wires 600a and 600b by separating the second clamp 300 from the first clamp 200, the electric wires 600a and 600b are torn. Since the cutting groove 620 is formed by being cut by the cutter 153, the cutting cutter 15 at the time of cutting the electric wire is used.
3 is secured to the electric wires 600a and 600b at a constant amount, thereby preventing the occurrence of a cutting defect and preventing the cutting cutter 153 from coming into contact with the core wire 603.
3 is prevented from being damaged and cut.

In the above embodiment, the second clamp 3
00 away from the first clamp 200
After removing the slack of the electric wires 600a, 600b,
Although 00b is moved to a position corresponding to the cutting cutter 153, their work order may be changed. For example, the electric wires 600a, 600b are moved to a position corresponding to the cutting cutter 153, and then the electric wires 600a, 600b are moved.
The slack of the wire 600b may be removed, or the electric wires 600a and 600b may be cut and cut by a cutter 103.
The two clamps 200, 300 are moved in parallel with the movement of the cutting cutter 153 from the position of the cutting cutter 153 to the position of the cutting cutter 153.
May be separated from each other.

In the above embodiment, the first notch 61
1 is formed and then the slack is removed.
And the second cut portion 612 is formed, but the work order thereof can be changed. For example, the slack may be removed after forming the first and second cut portions 611 and 612, and then the cut groove 620 may be formed. In short, the electric wire 600a, 6
Before cutting 00b, the slack of the electric wires 600a and 600b may be removed.

Further, in the above embodiment, the first and second clamps 200 and 300 are separated by moving the second clamp 300 side, so that the electric wires 600a and 60
Although the slack of 0b is removed, the slack may be removed by moving the first clamp 200 side, or the slack may be removed by moving the first and second clamps 200 and 300 together. You may do so.

[0043]

As described above, according to the method for forming a cleavage groove in the intermediate strip apparatus for an electric wire of the present invention, the first and second clamps are relatively separated from each other so that the intermediate strip region of the electric wire is straightened. After the wire is stretched over, the intermediate strip area is cut by a cutting cutter to form a slit groove, so the wire is cut by the cutter in a state where the slack of the wire is removed, and the wire is cut at the time of the cut. The cutting amount of the cutting cutter into the wire is kept good,
In addition to preventing the occurrence of defective cutting, the contact of the cutting cutter with the core wire is prevented, so that the core wire is prevented from being damaged and cut.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a harness manufacturing apparatus to which a cleavage groove forming method according to an embodiment of the present invention can be applied.

FIG. 2 is a side view of the harness manufacturing apparatus.

FIG. 3 is a plan view of the harness manufacturing apparatus.

FIG. 4 is a perspective view of a main part of the harness manufacturing apparatus.

FIG. 5 is a perspective view showing a harness manufactured by the harness manufacturing apparatus.

FIG. 6 is a front view showing a cutter unit of the harness manufacturing device.

FIG. 7 is a side view for explaining the operation of the harness manufacturing device.

FIG. 8 is a side view for explaining the operation of the harness manufacturing device.

FIG. 9 is a side view for explaining the operation of the harness manufacturing apparatus.

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

FIG. 11 is a side view for explaining the operation of the harness manufacturing device.

FIG. 12 is a side view for explaining the operation of the harness manufacturing device.

FIG. 13 is a side view for explaining the operation of the harness manufacturing apparatus.

FIG. 14 is a side view for explaining the operation of the harness manufacturing device.

FIG. 15 is a side view for explaining the operation of the harness manufacturing device.

FIG. 16 is a side view for explaining the operation of the harness manufacturing device.

FIG. 17 is a side view for explaining the operation of the conventional harness manufacturing device.

FIG. 18 is a side view for explaining the operation of the conventional harness manufacturing device.

FIG. 19 is a side view for explaining a problem in a conventional harness manufacturing device.

FIG. 20 is a side view for explaining a problem in a conventional harness manufacturing apparatus.

[Explanation of symbols]

 103 cutting / cutting cutter 153 cutting cutter 200 first clamp 300 second clamp 600a, 600b electric wires 611,612 cut section 620 cut groove

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-63-287312 (JP, A) JP-A-3-8217 (JP, A) JP-A-2-206314 (JP, A) JP-A 52-87 36774 (JP, A) JP-A-61-58412 (JP, A) JP-A-62-126811 (JP, A) JP-A-3-226211 (JP, A) Japanese Utility Model Laid-Open No. 63-176312 (JP, U) JP-U 4-118 (JP, U) JP-B-51-1032 (JP, B1) JP-B-56-20776 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02G 1/12

Claims (1)

(57) [Claims] 1. A first and a second clamp, which are capable of grasping and releasing an electric wire and movable at least along a longitudinal direction of the electric wire, and for cutting the outer periphery of a covering portion of the electric wire by sandwiching the electric wire. An intermediate strip device for an electric wire having a pair of cutting cutters and a cutting cutter for cutting a covering portion of the electric wire along a longitudinal direction of the electric wire, wherein the electric wire is gripped by the first and second clamps. A first step of cutting at least one of one end and the other end of the intermediate strip region of the electric wire between the two clamps with the cutting cutter to form a cut portion; After completion of the first step, at least one of the first and second clamps is moved along the longitudinal direction of the electric wire. A second step in which the first and second clamps are relatively separated from each other to linearly stretch the intermediate strip region of the electric wire; and after the second step is completed, By moving the first and second clamps along with the electric wire along the longitudinal direction thereof in a state where the cutting cutter is inserted into the covering portion on one end side of the intermediate strip area of the intermediate strip area, And forming a slit-like slit from the one end to the other end of the wire.