JP2008011602A - Cable chuck and cable processing device, and its method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve the setting of an optimum overhang at stripping and press-bonding by a simple constitution. <P>SOLUTION: Correction chucks 8 are slidably connected to chuck jaws 3 of a cable chuck 1 via a pair of rods 6, 6, and can be opened and closed integrally with the chuck jaws 3, 3. V-shaped grooves 9 are formed on faces which oppose with each other at the closing operation of each correcting chuck 8, and in a closed state, a guide hole 10 through which the cable gripped by the chucks 3, 3 loosely passes can be formed in a penetration state. Furthermore, a coil spring 12 is externally arranged at the lower rod 6 of each correction chuck 8, and the correction chuck 8 is energized in an advanced position farthest from the chuck 3 by the abutment of a retention part 7 of the rod 6 against the chuck 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electric wire chuck used for gripping an electric wire at the time of processing for stripping an insulation coating of an electric wire such as a wire harness of an automobile and crimping a terminal, an electric wire processing apparatus using the electric wire chuck, and a method thereof. .

  For example, in a wire harness of an automobile, crimping of a terminal is performed in an electric wire processing apparatus including a strip portion for stripping off the insulation coating on the end of the electric wire and a crimping portion for crimping the terminal to the end of the electric wire from which the insulation coating has been stripped. . In this electric wire processing apparatus, an electric wire chuck that grips the end portion of the wire harness and conveys it to the strip portion and the crimping portion is used. An electric wire chuck improved like the electric wire processing apparatus disclosed in Patent Document 1 is used. This is connected to the main body of the clamp means at the front position of the clamp means (a pair of clamp claws) for gripping the electric wire and moving it to the next process. A vibration suppressing means (a pair of steadying plates) that changes the relative distance is provided, and stripping and crimping are favorably performed by suppressing the vibration of the electric wire.

Japanese Patent Laid-Open No. 7-45351

In the electric wire chuck disclosed in Patent Document 1, in order to change the protruding amount (overhang) of the electric wire from the vibration suppression means, the movement is controlled with the clamp means by a movement control mechanism such as a motor or a ball screw provided in the main body. One of the means must be moved forward and backward. Therefore, the entire apparatus is complicated and large, leading to an increase in cost.
Further, it is necessary to set a stop position in order to obtain an overhang suitable for the movement control mechanism. Especially in the case of strip and crimping, suitable overhangs are often different, so it is necessary to set the stop position separately in each case, and control is performed whenever the specifications change in the strip part or crimping part It takes time to modify the program, and setting management is troublesome.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an electric wire chuck, an electric wire processing apparatus, and a method thereof that can realize an optimum overhang setting at the time of stripping and crimping with a simpler configuration.

In order to achieve the above object, according to the first aspect of the present invention, as an electric wire chuck, a correction hole that opens and closes each chuck claw in conjunction with the chuck claw and forms a guide hole into which the electric wire is loosely inserted in the closed state. The chuck is provided in a state that it can slide in the direction of the electric wire held by the chuck claw and is urged away from the chuck claw.
In addition to the object of claim 1, the invention described in claim 2 is opposite to the chuck claw in the correction chuck in order to prevent mutual interference between the correction chuck that abuts when the electric wire is conveyed, the strip portion, and the crimping portion. A protruding portion that partially protrudes is provided on the outer surface of the side.
According to a third aspect of the present invention, in addition to the object of the second aspect, in order to obtain a suitable protrusion, the protrusion is a roller that is rotatably mounted on the correction chuck.

  In order to achieve the above-mentioned object, the invention according to claim 4 is a crimp part for crimping a terminal to a strip part from which an insulation coating is stripped off at an end of an electric wire and an end of an electric wire from which the insulation coating has been stripped off at the strip part. A wire chuck according to any one of claims 1 to 3 for conveying the wire to at least the strip portion and the crimping portion, loosely inserting the guide hole of the correction chuck, With the part protruding, hold the electric wire with the chuck claw, advance the electric wire chuck with the straightening chuck toward the strip part and the crimping part side, and connect the electric wire with the straightening chuck in contact with the strip part and the crimping part. It conveys to a predetermined position.

  In order to achieve the above object, the invention according to claim 5 is a stripping process for stripping the insulation coating on the end of the electric wire, and a crimping operation for crimping the terminal to the end of the electric wire from which the insulation coating has been stripped in the stripping process. An electric wire processing method comprising the steps of: using the electric wire chuck according to any one of claims 1 to 3 for conveying the electric wire to the strip portion and the crimping portion at least in the strip step and the crimping step. With the hole inserted loosely and the end of the wire protruding, the chuck claw grips the wire, the correction chuck is moved toward the strip portion and the crimping portion, the wire chuck is advanced, and the correction chuck is applied to the strip portion and the crimping portion. The electric wire is transported to a predetermined position in a contact state.

According to the present invention, when the electric wire is conveyed, the correction chuck comes into contact with the strip portion or the crimping portion to guide the electric wire. Therefore, the overhang of the electric wire is always automatically set to the minimum necessary amount, and the bending of the electric wire is effectively prevented, and the strip error and the crimp error are reduced. Since the automatic setting of this overhang can be realized only by adding a correction chuck or the like, the setting of the movement control mechanism and its stop position is not required, and the cost and the labor of management can be minimized.
According to the second aspect of the present invention, in addition to the effect of the first aspect, the protrusions prevent mutual interference between the strip portion and the crimping portion in a state in which the correction chuck is in contact with each other. Will no longer adversely affect
According to the third aspect of the present invention, in addition to the effect of the second aspect, since the protruding portion is a roller, mutual interference between the strip portion and the crimping portion is more effectively prevented by the rolling of the roller. it can.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an example of an electric wire chuck according to the present invention. The electric wire chuck 1 includes a pair of chuck claws 3 and 3 that can be opened and closed at the upper end of a holding portion 2. Each chuck claw 3 is connected to the holding portion 2 at the lower end side, and has a well-known structure that opens and closes synchronously by air drive as shown in FIGS. 2 (A) and 2 (B). In the center, V-shaped grooves 4 that are engaged with each other are formed so as to leave the holding hole 5 of the electric wire in a penetrating manner, and the electric wire can be gripped in an intersecting manner by the holding hole 5.
Further, in the axial direction of the holding hole 5 in each chuck claw 3 (the direction of the electric wire to be gripped), a pair of rods 6 and 6 positioned up and down when the chuck claws 3 and 3 are closed are in the axial direction of the holding hole 5. It is loosely slidably inserted. One end of each rod 6 is formed with a retaining portion 7 having a diameter larger than the through-hole of the chuck claw 3, while the other end has a chuck claw 3 for each of the pair of rods 6, 6 on the left and right. Parallel straightening chucks 8 are respectively fixed.

The straightening chucks 8 and 8 are opened and closed integrally with the chuck claws 3 and 3 through the rods 6 and 6, and the surfaces facing each other at the time of closing operation are as shown in FIG. Each of the V-shaped grooves 9 is formed, and in the closed state, the guide hole 10 having an opening area larger than the cross-sectional area of the electric wire 15 in the center and positioned coaxially with the holding hole 5 on the chuck claw 3 side is formed. It can be formed in a penetrating shape.
A roller 11 as a protruding portion is provided on the outer surface of each correction chuck 8 on the side opposite to the chuck claw 3. The roller 11 is positioned below the correction chucks 8 and 8 in the closed state, and can be rotated with a part of the peripheral surface protruding forward by a horizontal axis in a recess formed in the correction chuck 8. It is to be attached to.
Further, the lower rod 6 of each correction chuck 8 is provided with a coil spring 12, and the coil spring 12 allows the correction chuck 8 in a normal state to contact the chuck claw 3 with the retaining portion 7 of the rod 6. Thus, it is urged to the forward moving position that is farthest from the chuck pawl 3.

  As shown in FIG. 3, the electric wire processing apparatus 20 using the electric wire chuck 1 peels off the insulating portion at the end of the cut electric wire and the cutting portion 21 for cutting the electric wire sent from the wire feeder with a predetermined dimension. The process part of the strip part 22 to take, the crimp part 23 which crimps | bonds a terminal to the conductor part of the electric wire from which insulation coating was stripped, and the connector connection part 24 which inserts the crimped terminal in a connector are arranged in parallel. Thus, the electric wire chuck 1 is controlled to move in the left-right direction in the figure moving between the process parts and in the vertical direction in the figure moving back and forth toward each process part by a known moving mechanism such as a ball screw. That is, the electric wire cut by the cutting part 21 is received and transported to the strip part 22, the insulation coating is peeled off by the strip part 22, and then transported to the crimping part 23, and the terminal is crimped by the crimping part 23. It is carried out and transferred to the connector mechanism 24 by passing it to the downstream feed mechanism.

Hereinafter, the processing procedure of the electric wire in the electric wire processing apparatus 20 of FIG. 3 will be described focusing on the operation of the electric wire chuck 1.
First, as shown in FIG. 4A, the wire chuck 1 supports the holding portion 2 so as to be movable in the vertical direction, and via a support base 13 in which a coil spring 14 is interposed between the bottom surface of the holding portion 3. When the wire cut by the cutting portion 21 is received, the tip of the wire 15 protrudes forward from the correction chuck 8 to a predetermined amount as shown in FIG. It is designed to receive overhangs. In this state, the electric wire 15 is gripped by the holding holes 5 of the chuck claws 3 and 3, but is loosely inserted into the guide holes 10 of the correction chucks 8 and 8.

  Next, the electric wire chuck 1 is moved to the position facing the strip portion 22 by the moving mechanism and advances toward the strip portion 22 side, and the end portion of the electric wire 15 is moved to a predetermined cutting position by a cutting tool (not shown) of the strip portion 22. set. At this time, the rollers 11 and 11 of the correction chucks 8 and 8 first come into contact with the blade and advance is stopped. However, since the electric wire 15 is loosely inserted into the guide hole 10 of the correction chucks 8 and 8 and is not interfered, the electric wire 15 is left as it is. Moves to the cutting position. Therefore, only the correction chucks 8 and 8 are relatively retracted from the end portion of the electric wire 15 to change the overhang S of the electric wire 15 as shown in FIG. By this operation, the electric wire 15 advances while being guided by the guide hole 10 of the correction chucks 8 and 8 and is held in the guide hole 10 at the nearest position, so that the electric wire 15 is not bent and straight. Is set to the cutting position.

  After completing the setting of the electric wire 15, the strip portion 22 closes the blade and engages the insulating coating on the end portion of the electric wire. At this time, since the rollers 11 and 11 that are in contact with the blade rotate, there is no resistance to the blade. When the electric wire chuck 1 is retracted from here, the insulating coating is peeled off from the blade as the electric wire 15 is retracted, and the conductor portion is exposed. With this retreat, the correction chucks 8 and 8 return to the advance position by the biasing force of the coil spring 12, and become the original overhang again.

  Next, the wire chuck 1 is moved to the position facing the crimping portion 23 by the moving mechanism, advances to the crimping portion 23 side, and the end portion of the electric wire 15 where the conductor portion is exposed is moved to a predetermined crimping position by the crimping portion 23. Set to. At this time, similarly to FIGS. 4B and 4C, the rollers 11 and 11 of the correction chucks 8 and 8 first contact the crimping portion 23 to stop the advance, and the wire 15 moves to the crimping position as it is. On the other hand, it moves backward relatively and changes the overhang of the electric wire 15 from the correction chucks 8 and 8. Therefore, the electric wire 15 advances while being guided by the guide hole 10 of the correction chucks 8 and 8 and is held in the guide hole 10 at the nearest position, so that the electric wire 15 is not bent and is crimped in a straight state. Set to In addition, since crimping is performed including insulation coating, the overhang at the time of crimping becomes larger than the overhang at the time of stripping.

Further, the electric wire chuck 1 follows the vertical movement of the electric wire 15 during the crimping by moving up and down on the support base 13. Also in this case, the roller 11 comes into contact with the crimping portion 23 side and rolls.
When the crimping of the terminal at the crimping portion 23 is completed in this manner, the electric wire chuck 1 is retracted and separated from the crimping portion 23, and the electric wire 15 with the terminal crimped is delivered to the subsequent feed mechanism. In the subsequent stage, the terminal is inserted into the connector at the connector connecting portion 24 and sent to the next processing machine.

As described above, according to the wire chuck 1 and the wire processing apparatus 20 of the above embodiment, when the wire 15 is transported, the correction chucks 8 and 8 are brought into contact with the strip portion 22 and the crimping portion 23 to guide the wire 15. It becomes. Therefore, the overhang of the electric wire 15 is always automatically set in the necessary minimum amount, the bending of the electric wire 15 is effectively prevented, and the strip error and the crimp error are reduced. Since the automatic setting of the overhang can be realized only by adding the correction chuck 8 or the like, it is not necessary to set the movement control mechanism and its stop position, and the cost and the labor of management can be minimized.
Further, by providing the wire chuck 1 with the roller 11 as a protruding portion, mutual interference with the strip portion 22 and the crimping portion 23 in a state in which the correction chuck 8 is in contact is prevented, and the strip and the crimping are adversely affected. No effect. In particular, since the roller 11 is used, interference between the strip portion 22 and the crimping portion 23 can be more effectively prevented by the rolling of the roller 11.

In addition, in the said form, although the correction chuck | zipper is connected with the chuck | zipper nail | claw with a pair of rod, respectively, a single rod may be sufficient and it can connect with a 3 or more rod conversely. Of course, the correction chuck may be connected not only by the rod but also by a connecting member having another shape such as a plate-like body.
In addition, a coil spring for biasing the correction chuck can be provided on all the connecting members, and other biasing means such as a disc spring and a leaf spring can be employed in addition to the coil spring. Further, for example, the rod is formed in a double cylinder structure, the large diameter cylinder is connected to the chuck claw, and the small diameter cylinder inserted into the chuck claw is connected to the correction chuck, and the small diameter cylinder is formed by an elastic means such as a coil spring provided inside the large diameter cylinder. However, the present invention is not limited to the above-described form.

On the other hand, the correction chuck is not limited to the same shape as the chuck claw, and for example, the cylindrical portion into which the electric wire is loosely inserted may be divided in half and connected to the chuck claw by a connecting member such as a rod.
In addition, the design of the projecting part can be changed by placing multiple rollers on the top and bottom of the correction chuck. Of course, not only the roller but also the ball is embedded with the part of the outer surface of the correction chuck exposed. The design can be changed as appropriate as long as it mitigates interference with the strip portion or the crimping portion, such as by simply providing a spherical, semicircular or trapezoidal protrusion on the outer surface of the correction chuck.

And in the electric wire processing apparatus of the said form, an electric wire chuck moves each process part, such as a strip part and a crimping | compression-bonding part, and conveys an electric wire, The same electric wire chuck is installed in each process part, respectively. The present invention can also be applied to other types of apparatuses such as an electric wire processing apparatus that transfers electric wires to each electric wire chuck by other conveyance mechanisms such as a conveyance chuck and moves forward and backward with respect to each process section.

It is a perspective view of an electric wire chuck. (A) is a rear view of the electric wire chuck, (B) is a rear view of the electric wire chuck in a state where the chuck claw is opened, and (C) is an enlarged view of the correction chuck. It is a schematic block diagram of an electric wire processing apparatus. It is explanatory drawing which shows the conveyance state of the electric wire to the process part by an electric wire chuck, (A) is before receipt of an electric wire, (B) shows the advance state to a process part, (C) shows the set state to a process part, respectively. .

Explanation of symbols

1 .... Wire chuck, 2 .... Holding part, 3 .... Chuck claw, 5 .... Holding hole, 6 .... Rod, 8 .... Straight chuck, 10 .... Guide hole, 11 .... Roller, 12 .... Coil spring , 13 .. Support base, 15 .. Electric wire, 20 .. Electric wire processing device, 21 .. Cutting part, 22 .. Strip part, 23 .. Crimp part, 24.

Claims (5)

An electric wire chuck provided with a pair of chuck claws capable of opening and closing between a closed state for gripping an electric wire and an open state for releasing the grip,
Each chuck claw is operated to open and close in conjunction with the chuck claw, and in a closed state, a correction chuck that forms a guide hole into which the electric wire is loosely inserted is slidable in the direction of the electric wire held by the chuck claw, and An electric wire chuck characterized by being provided in a state of being biased in a direction away from the chuck claws.   The electric wire chuck according to claim 1, wherein a protruding portion that partially protrudes is provided on an outer surface of the correction chuck opposite to the chuck claw.   The electric wire chuck according to claim 2, wherein the protrusion is a roller that is rotatably attached to the correction chuck. An electric wire processing apparatus having a strip portion for stripping off the insulation coating at the end of the electric wire, and a crimping portion for crimping the terminal to the end of the electric wire from which the insulation coating has been stripped off at the strip portion,
The electric wire chuck according to any one of claims 1 to 3 is used to convey the electric wire to at least the strip portion and the crimping portion, and the electric wire is attached to the chuck claw in a state where the guide hole of the correction chuck is loosely inserted and the electric wire end portion protrudes. The wire chuck is advanced toward the strip portion and the crimping portion side, and the wire is conveyed to a predetermined position while the correction chuck is in contact with the strip portion and the crimping portion. An electric wire processing apparatus. A wire processing method comprising: a stripping process for stripping off the insulation coating on the end of the electric wire; and a crimping process for crimping a terminal to the end of the electric wire from which the insulating coating was stripped in the stripping process,
At least in the strip step and the crimping step, the electric wire chuck according to any one of claims 1 to 3 is used for conveying the electric wire to the strip portion and the crimping portion, and the guide hole of the correction chuck is loosely inserted so that the end portion of the electric wire is A state in which the chuck claw grips the electric wire in a protruding state, the electric chuck is advanced toward the strip portion and the crimping portion, and the correction chuck is brought into contact with the strip portion and the crimping portion. The electric wire processing method, wherein the electric wire is conveyed to a predetermined position.

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