JPH0666148B2 - 2-step clamp method for electric wire - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-step clamping method of an electric wire for guiding and clamping an electric wire crimped with a terminal in an automatic terminal crimping device for crimping a terminal to a strip of electric wire.

[0002]

2. Description of the Related Art An automatic terminal crimping device of this type already proposed has a structure as shown in FIGS.

That is, in FIG. 5 to FIG. 7, a long electric wire W in which the electric wire feeding device 2 by a pair of electric wire feeding rollers 2a and 2b is wound in a bundle at a substantially central portion of the machine frame 1 in the automatic terminal crimping device. It is rotatably provided while nipping and transporting the electric wire W while measuring forward, and on the machine frame 1 of the electric wire W transfer path where the electric wire feed rollers 2a and 2b are located,
The electric wire W is cut by the pair of strip blades 4a and the cutting blades 4b at the same time when the end portion of the electric wire W measured by the electric wire cutting and stripping device 3 is cut, and then the electric wire W is moved back and forth. The strips Wa are peeled off to form the strips Wa.

On the other hand, a pair of brackets 5 are provided on the machine frame 1 beside the electric wire feeding rollers 2a, 2b, and both brackets 5 are provided with a base portion 6 of a swing arm rod 6.
The shaft a is mounted so that it can be reciprocally rotated by the drive shaft 7.
Further, a main guide tube body 8 is provided at a free end portion 6b of the swivel arm rod 6 so as to be orthogonal to the swivel arm rod 6 and the electric wire W is drawn through the main guide tubular body. A guide cylinder 9 is detachably attached to the front end of 8.
The guide cylinder 9 can be exchanged according to the different thickness of the electric wire W. Furthermore, a first crimping device (primary crimping device) 1 is attached to the machine frame 1 on the turning path of the swivel arm rod 6.
A machine base 12 of No. 1 is provided, and a crimping piece 1 having a movable blade that moves up and down is provided above the anvil 13 of the machine base 12.
4 is a strip Wa of the wire W, as shown in FIG.
While crimping the terminal Wb having the leader portion Wc,
It is provided so as to cut the connecting portion of the leader portion Wc.

On the other hand, as shown in FIG. 5, an electric wire guide member 16 having a guide hole 15 in the shape of a truncated cone is arranged in the machine frame 1 in front of the electric wire strip device 3. A known rotary table 17, such as an index table, is mounted on the machine frame 1 in front of the electric wire guide member 16 so as to rotate intermittently and reciprocally slide in the axial direction. A plurality of electric wire gripping devices (electric wire clamping devices) 18 are provided on the outer circumference of the rotary table 17.
Is provided so as to grip the end of the cut electric wire W, rotate intermittently, and transfer the wire to the next second crimping device (secondary crimping device) 19.

The second crimping device 19 is the same as the first crimping device.
The second crimping device 19 has the same structure as the crimping device 11.
The anvil 13 of the machine base 12 and the crimping element 14 having the movable blade in FIG. 11 are for crimping the strip Wa of the electric wire W and the terminal Wb having the leader portion Wc to cut the leader portion Wc (see FIG. 6). .

Therefore, in the above-described automatic terminal crimping device, as shown in FIG. 5, the electric wire W is previously sandwiched between the pair of electric wire feeding rollers 2a and 2b and is moved forward while being measured. At the same time, the electric wire W is drawn through the main guide cylinder 8 and the electric wire guide member 16 of the swivel arm rod 6, and the electric wire W is gripped by the wire gripping device 18.

Next, the cutting and stripping device 3 moves the electric wire W slightly back and forth while simultaneously cutting the end portion of the scaled electric wire W with the pair of strip blades 4a and the cutting blades 4b. By reciprocally sliding the rotary table 17 in the axial direction, the coating of the cut portion of the electric wire W is separated by the pair of strip blades 4a to form each strip Wa. Then, the electric wire feed rollers 2a, 2b open outwardly to release the clamping operation of the electric wire W, and at the same time, the swivel arm rod 6 is rotated by the drive shaft 7, and the main arm of the swivel arm rod 6 is rotated. The guide cylinder 9 integrated with the guide cylinder 8 is connected to the electric wire W.
At the same time, when it is transferred to the anvil 13 of the machine base 12 of the first crimping device 11, the anvil 13 of the first crimping device 11 and the crimping member 14 having a movable blade cause the strip Wa of the wire W and the terminal Wb having the leader portion Wc. The connecting portion of the leader portion Wc is cut while pressing and. Then, when the first crimping device 11 finishes the crimping, the guide tube body 9 of the swivel arm rod 6 which is integral with the main guide tube body 8 is returned to the original position together with the electric wire W to return to the respective electric wire feed rollers. 2a and 2b close inwardly with each other to clamp the electric wire W again.

On the other hand, the wire gripping device 18 gripping the cut leading wire W moves intermittently and transfers the wire W to the next second crimping device 19, so that the second crimping device 19 is anvil. After the strip Wa of the electric wire W and the terminal Wb are crimped by the crimping element 13 having the movable blade 13 and the crimping element 14, the electric wire W having both terminals Wb is taken out of the machine.

[0010]

However, in the above-described automatic terminal crimping device, when the first crimping device 11 finishes crimping the terminal Wb to the strip Wa, the guide tubular body 9 integral with the main guide tubular body 8 is formed. The terminal Wb is returned to the original position together with the crimped electric wire W and returns to the electric wire feed rollers 2a, 2b.
Are inwardly closed and the electric wire W is again clamped, and then the electric wire is fed forward by the electric wire feed rollers 2a and 2b, and the electric wire gripping device 18 of the rotary table 17 grips the electric wire W,
Due to the fact that this is intermittently rotated and transferred to the next second crimping device 19, the swivel arm rod 6 can be returned at a high speed, or
When the distance (span) between the wire guide member 16 and the rotary table 17 increases, the tip of the wire W crimped with the terminal Wb becomes heavy and bends, as shown in FIG. Not only is there a possibility that the wire gripping device 18 will not be smoothly guided through the hole 15,
When the strip Wa is formed at the tail end of the electric wire W, the strip blade 4a and the cutting blade 4b are broken by the terminal Wb that is crimped in advance, and if this is continued, there is a possibility that many electric wires that follow are damaged. There are problems such as a significant decrease in production efficiency.

In order to solve the above-mentioned problems, the present invention provides a clamping device in the space between the electric wire guide member and the rotary table, and further, performs the guiding operation and the clamping operation in two steps. , Which eliminates the clamping error of the above wire gripping device, shortens the clamping time, and allows the next step to be moved promptly, and at the same time, prevents the electric wire with terminals from being bent and improves the production efficiency. It is an object of the present invention to provide a two-stage clamping method of

[0012]

SUMMARY OF THE INVENTION The present invention is an automatic terminal crimping device for crimping a terminal to a strip of electric wire, wherein a clamp device is provided near the electric wire guide member, and both gripping claws of the clamp device are closed intermediately. In the first step, a gap is formed so that the tip of the wire can be guided and passed therethrough, and when the tail end of this wire is passed, the two gripping claws are completely closed. In the second step, the wire is clamped and temporarily held. , A two-step clamping method for an electric wire that is transferred to and from another electric wire gripping device.

[0013]

In the present invention, when the first crimping device finishes the crimping,
In the first step of intermediately closing both gripping claws of the clamp device in the vicinity of the wire guide member, a gap is formed so that the distal end of the wire can be guided and passed, and when the tail end of this wire is passed, both gripping claws are formed. In the second stage of completely closing, the electric wire is clamped and temporarily grasped, and the cut preceding electric wire is transferred to the electric wire grasping device of the rotary table, and thereafter, the electric wire grasping device is intermittently rotated, It is transferred to the next second crimping device, and the terminal is crimped to the strip of the electric wire W by the anvil and crimping device of the second crimping device and taken out of the machine.

[0014]

The present invention will now be described with reference to the illustrated embodiments.

The present invention will be described by giving the same reference numerals to the same constituent members as those of the above-described specific example.

In FIG. 4, reference numeral 1 is a machine frame in the automatic terminal crimping device, and the machine frame 1 is provided at a substantially central portion thereof.
Electric wire feeding device 2 by a pair of electric wire feeding rollers 2a, 2b
Is rotatably provided while sandwiching a long electric wire W wound in a bundle so as to generate an electric wire feed count signal for counting the number of measuring electric wires and moving it forward while measuring it. On the machine frame 1 of the transfer path of the electric wire W where the electric wire feed rollers 2a and 2b are located, the end portion of the electric wire W on which the electric wire cutting and stripping device 3 is scaled is provided with a pair of strip blades 4a and cutting blades. 4b is cut at the same time as cutting, and then the electric wire W is moved back and forth to peel off the coating of the electric wire W to form each strip Wa.

On the other hand, a pair of brackets 5 are provided on the machine frame 1 beside the electric wire feeding rollers 2a, 2b of the electric wire feeding device 2, and both of the brackets 5 are provided with a turning arm rod 6. The base portion 6a is mounted so as to be capable of reciprocating rotation on the drive shaft 7. Further, the free end portion 6 of the swing arm rod 6 is
In b, the main guide cylinder 8 is orthogonal to the swivel arm rod 6,
Moreover, the electric wire W is provided so as to pass therethrough, and the guide cylinder 9 is detachably attached to the front end portion of the main guide cylinder 8. The guide cylinder 9 has a different electric wire W. It can be replaced according to the thickness. Further, a machine base 12 of a first crimping device (primary side crimping device) 11 is provided on the machine frame 1 on the turning path of the swivel arm rod 6, as shown in FIG.
As shown in FIG. 3, a pressure contactor 14 having a movable blade that moves up and down is provided above the anvil 13 of the machine base 12 to connect the electric wire W.
While the strip Wa and the terminal Wb having the leader portion Wc are crimped, the connecting portion of the leader portion Wc is cut.

On the other hand, as shown in FIG. 4, an electric wire guide member 16 having a frustoconical guide hole 15 is disposed in the machine frame 1 in front of the cutting and stripping device 3. A known rotary table 17 such as an index table is mounted on the machine frame 1 in front of the wire guide member 16 so as to rotate intermittently and reciprocally slide in the axial direction. Also, this rotary table 1
A plurality of electric wire gripping devices (electric wire clamping devices) 18 grip the ends of the cut electric wires W on the outer periphery of 7 and rotate intermittently, and the next second crimping device (secondary side crimping device) It is provided to be transferred to 19.

On the other hand, as shown in FIGS. 1 to 4,
A clamp device 20 is vertically provided in a space between the electric wire guide member 16 and the electric wire gripping device 18 of the rotary table 17, and the clamp device 20 is provided with a pair of opening shafts 21 a of a cylinder device 21. Leg lever 22a,
22b are pivotally attached to each other by a pin shaft 23.
a pair of gripping claws 24a and 24b at the free ends of a and 22b.
Is connected by pins 25a and 25b so as to hold the electric wire W, and the middle of the holding claws 24a and 24b is pivotally attached to a stationary member (not shown) by support shafts 26a and 26b.

Therefore, as shown in FIGS.
When the clamp device 20 drives the cylinder device 21, the output shaft 21a of the cylinder device 21 causes the opening levers 22a and 22b to move outward about the pin shaft 23 by approximately 12 degrees.
The legs are opened to about 0 ° and the gripping claws 24a and 24b connected to the leg opening levers 22a and 22b are connected to the support shaft 26.
1st pivoting inward with a and 26b as a fulcrum and intermediately closing
In the step (see FIG. 2), a gap is formed to guide the tip of the electric wire W so that the electric wire W can pass therethrough. Then, when the cylinder device 21 is further driven when the tail end of the electric wire W is passed, both gripping claws are In the second stage where 24a and 24b are completely closed, the electric wire W is clamped in two stages and temporarily held. Both gripping claws 24a, 24 that clamp the electric wire W in this way
b is reliably transmitted / received to / from another electric wire gripping device 18.

The operation of the present invention will be described below.

The normal operation of the automatic terminal crimping device of the present invention is the same as that of the above-described embodiment.

On the other hand, during normal operation of the automatic terminal crimping device,
When the first crimping device 11 finishes crimping the terminal Wb to the strip Wa, the guide tubular body 9 integrated with the main guide tubular body 8 returns to the original position together with the electric wire W crimping the terminal Wb to feed the electric wire. After the electric wire feed rollers 2a, 2b of the device 2 are closed inwardly to hold the electric wire W again, and then the electric wire feed rollers 2a, 2b are fed forward, the terminals Wb
The electric wire W crimped with is the guide hole 15 of the electric wire guide member 16.
When passing through the clamp device 20, the cylinder device 21 of the clamp device 20 is driven, and the output shaft 21a of the cylinder device 21 is moved to the leg opening levers 22a and 22b.
Of the gripping claws 24a, 24b which are opened outwardly around the pin shaft 23 and are connected to the respective opening leg levers 22a, 22b.
In the first step (see FIG. 2) of intermediately closing, the gap (space) through which the tip of the electric wire W can be guided and formed is formed. Thereafter, when the cylinder device 21 is further driven when the tail end portion of the electric wire W is passed, both the gripping claws 24a, 2
In the second step in which 4b is completely closed, the electric wire W is clamped in two steps and temporarily held.

Since the two gripping claws 24a and 24b which have clamped the electric wire W in this manner are transferred to and from the other electric wire gripping device 18, a mistake in clamping the electric wire gripping device 18 can be eliminated, and the clamping time can be shortened to quickly. In addition, it is possible to move to the next step and prevent the electric wire W from being bent.

[0025]

As described above, the present invention is an automatic terminal crimping device for crimping a terminal to a strip of electric wire, in which a clamping device is provided in the vicinity of the electric wire guide member, and both gripping claws of the clamping device are intermediately provided. In the first stage of closing, a gap is formed so that the tip of the wire can be guided and passed, and when the tail end of this wire is passed, both gripping claws are completely closed. In the second step, the wire is clamped and temporarily held. However, since this is a two-step clamping method of the electric wire which is transferred to the electric wire gripping device of the rotary table, not only the mistake in clamping of the electric wire gripping device can be eliminated, but also the clamping time is shortened and the next step is promptly performed. It has an excellent effect that it can be transferred to, the electric wire can be prevented from being bent and the production efficiency can be improved, and can be easily incorporated into an existing automatic terminal crimping device.

[Brief description of drawings]

FIG. 1 is a front view for explaining the configuration of a two-step clamp method for an electric wire according to the present invention.

FIG. 2 is a view for explaining the action of the two-step clamping method for electric wires of the present invention.

FIG. 3 is a view for explaining the action of the two-step clamping method for electric wires of the present invention.

FIG. 4 is a plan view of an automatic terminal crimping device incorporating the two-step electric wire clamping method of the present invention.

FIG. 5 is a plan view of an automatic terminal crimping device that has already been proposed.

FIG. 6 is an enlarged side view of an already proposed automatic terminal crimping device.

FIG. 7 is a view for explaining the operation of the already proposed automatic terminal crimping device.

[Explanation of symbols]

 16 wire guide member 17 rotary table 18 wire gripping device 20 clamp device 24a, 24b gripping claw

Claims (1)

[Claims] 1. An automatic terminal crimping device for crimping a terminal to a strip of an electric wire, wherein a clamp device is provided in the vicinity of an electric wire guide member, and a tip portion of the electric wire is provided in a first step of intermediately closing both gripping claws of the clamp device. To form a gap through which the electric wire can pass, and when the tail end of the electric wire passes, the electric wire is clamped and temporarily grasped in the second step of completely closing both gripping claws, and the electric wire is grasped on the rotary table. A two-step method for clamping an electric wire, which is characterized by giving and receiving to and from a device.