JP3163970B2 - Terminal crimping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal crimping apparatus of the type in which terminal fittings formed in a chain in the vertical direction are intermittently fed and sequentially crimped.

[0002]

2. Description of the Related Art First, the outline of the operation of this type of terminal crimping apparatus will be described as follows. That is, as shown in FIG. 6, the terminal fittings a are formed in a chain in the vertical direction, and are advanced intermittently by a constant pitch on the guide rail by a feed claw 41 driven forward and backward by a cam device, so that the leading-edge terminal a The metal fittings a are sequentially fed to the crimping position A. The crimping position A
Then, the crimper descends and clamps the barrels c and d between the crimper and the fixed anvil, so that the crimping to the electric wire f is performed. After the crimper and the shear blade 42 are lifted and retreated, the above operation is sequentially repeated.

[0003] When the shear blade 42 is retracted, the insulation barrel d of the next terminal fitting a is lifted together by frictional engagement and may be bent and deformed with the wire barrel c. In order to prevent this, a stopper 43 is provided, and a means for preventing the above-described bending deformation from being generated is provided by causing the lifted insulation barrel d to hit the stopper 43 and rebound.

[0004]

However, if the terminal fitting a is made of, for example, a highly viscous material, the frictional engagement between the shear blade 42 and the cut portion is further increased due to the influence of cutting burrs. In this case, the contact of the insulation barrel d with the stopper 43 becomes extremely strong, and the insulation barrel d may be opened and deformed.

[0005] Then, when the crimping work is performed after being sent to the crimping position A, one side of the insulation barrel d is opened as shown in FIG. As shown in the figure, the butting position of the insulation barrel d is shifted.
There was a possibility that poor crimping could occur. In addition, depending on the mode of deformation of the insulation barrel d, the insulation barrel d may be caught and feed clogging of the terminal fitting a may occur. The present invention has been completed based on the above-described circumstances, and has an object to provide a terminal crimping apparatus having a function of preventing a failure in crimping and feeding of a terminal fitting from occurring. .

[0006]

As means for achieving the above object, the invention of claim 1 is to provide a terminal member formed in a chain in the longitudinal direction by a feed member driven forward and backward by a cam device. Advancing intermittently by a fixed pitch, feeding the most advanced terminal fittings sequentially to the crimping position, clamping the barrel between the upper and lower dies, crimping to the electric wire, and cutting driven forward and backward In a terminal crimping device configured to cut between the terminal fitting crimped by the blade and a terminal fitting behind the cam, the cam device includes: Is the terminal
In order to release the lock to the metal fitting,
It is characterized in that it is configured to retreat by a predetermined amount in the line direction .

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a guide body for feeding and guiding the terminal fittings formed in a chain in the vertical direction, a clamping die, and a cutting blade, and are driven forward and backward. A driven body, a driven body movably provided with a feed member, a cam surface provided on one of the driven body and the drive body and provided with a feed portion and a stop portion, and the driven body; A cam follower provided on the other side of the driving body and engaged with the cam surface.When the driving body advances, the feed member is advanced while the cam follower moves along the feed portion of the cam surface, and a series of Feeding the terminal fitting forward by a certain pitch and feeding the most advanced terminal fitting to the crimping position, and while the cam follower moves the stop portion of the cam surface, while stopping the feed of the terminal fitting by the feed member, The barrel is crimped by the clamping type, The cutting blade cuts between the crimped terminal fitting and the terminal fitting behind it, and at the time of retraction of the driving body, the cam follower sequentially moves the stop portion and the feed portion of the cam surface, and And a cutting blade and a terminal crimping device configured to return the feed member to the original position, the stop portion of the cam surface has a relative position of the cam follower when at least the cutting blade completes cutting and retreats. Where the escaped portion that functions to retract the driven member by a predetermined amount in a direction parallel to the feeding direction of the terminal fitting by retreating the driven body while allowing a slight movement is formed. Has features. A third aspect of the present invention is characterized in that, in the second aspect of the present invention, an urging means for urging the cam follower in a direction in which the cam follower comes into contact with a relief portion of the cam surface is provided.

[0008]

The operation and effect of the first aspect of the present invention are as follows. When the cutting blade is retracted after the cutting is completed, the feed member that has been advanced by the function of the cam device is retracted by a predetermined amount, and the engagement with the terminal fitting is released. As a result, the terminal fittings behind the crimped terminal fittings can be retracted by an amount corresponding to the retreat of the feed member. Therefore, the cutting blade can retreat while following the next terminal fitting backward and separating from the cutting blade. Therefore, for example, the barrel of the next terminal fitting is prevented from being deformed by being pressed against the stopper or the like. That is, the barrel can be prevented from being deformed before the terminal fitting is sent to the crimping position, and the barrel can be properly crimped, and the terminal fitting can be fed accurately and smoothly.

According to the second aspect of the present invention, when the cutting is completed and the cutting blade retreats, the cam follower relatively moves toward the relief portion corresponding to the relief portion of the cam surface. Then, the driven body retreats, and the feed member, which has been advancing accordingly, retreats by a predetermined amount, and the engagement with the terminal fitting is released. As a result, the terminal fittings behind the crimped terminal fittings can be retracted by an amount corresponding to the retreat of the feed member. Can be. Similarly, the barrel of the terminal fitting is prevented from being deformed by being pressed against the stopper or the like, and the barrel can be pressed properly, and the terminal fitting can be fed accurately and smoothly.

According to the third aspect of the present invention, the cam follower is reliably released toward the relief portion of the cam surface by the urging means, so that the feed member can reliably perform the predetermined amount of retreat function.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
A description will be given with reference to FIG. First, the overall structure of the terminal crimping apparatus according to the present embodiment will be described with reference to FIG. A guide rail 2 for feeding and guiding the terminal fittings a is installed in a horizontal posture on the lower front surface of the main body 1. The terminal fitting a
As shown in FIG. 5, a wire barrel c and an insulation barrel d are formed behind a main body b fitted and connected to a counterpart terminal fitting. In the state where c and d are opened, they are formed in a chain in the vertical direction via the bridge e. From the state where the insulation barrel d is wound forward in a rolled state, the insulation barrel d is drawn out from the roll in a posture facing forward. 1 along the guide rail 2 from the right side to the left side in FIG. The crimping position A is located at the tip of the guide rail 2.
Is provided.

Anvils 3 and 4 for receiving the lower surfaces of the barrels c and d of the terminal fitting a are fixed to the crimping position A, and an output of a driving device (not shown) is provided above the terminal fitting a. An elevating body 6 connected to the shaft 5 and driven to elevate is provided. The elevating body 6 has crimpers 7, 8 for caulking and crimping the barrels c and d between the anvils 3 and 4. Is attached. In addition, slit grooves 11 are provided at rear positions of the anvils 3 and 4 (right side in FIG. 1).
A fixed blade 10 provided with a shear blade 12 is fixedly provided, and a shear blade 12 is attached to the elevating body 6 at a position directly above the slit groove 11. When the shear blade 12 is lowered while being fitted into the slit groove 11 of the fixed blade 10, the bridge e between the crimped terminal fitting a and the terminal fitting a behind it is cut.

On the upper right side of the main body 1, a feed cam 15 provided with a feed claw 14 at its lower end is supported so as to be swingable about a shaft 16. As will be described in detail later, the feed cam 15 is provided with a feed portion 17a inclined with respect to the length direction of the feed cam 15 and a stop portion 17b parallel to the length direction of the feed cam 15. A cam groove 17 is formed, and a follower roller 20 supported on a support 19 protruding from the elevating body 6 is formed in the cam groove 17.
Are fitted.

The feed claw 14 is provided at the lower end of the feed cam 15. The feed claw 14 is supported on an adjusting member 23 slid by the adjusting screw 22 so as to be freely rotatable about a shaft 24, and is mounted between a rear end thereof and a side surface of the feed cam 15. The first
By the elastic force of the tension coil spring 25, the rotation is urged in the counterclockwise direction in the figure, that is, in the direction in which the tip protrudes toward the guide rail 2 side.

A portion of the guide rail 2 projecting rearward from the main body 1 is formed in a tunnel shape, and the leading end of the feed claw 14 is slid from the front end of the ceiling surface of the tunnel portion. A guide plate 27 for guiding while extending is provided, and from a rear end, a terminal press 28 for elastically pressing and aligning the upper surface of the terminal fitting a is provided.

That is, when the elevating body 6 descends from the state shown in FIG. 1, the follower roller 20 rolls along the feed portion 17a of the cam groove 17 while descending in the vertical direction.
The feed cam 15 is swung clockwise in FIG. Along with this, the feed claw 14 advances while sliding its tip against the guide plate 27, and abuts on the rear side of the wire barrel c in the terminal fitting a on the guide rail 2 (solid line in FIG. 5A). Then, the feed cam 15 swings in the same direction and the feed claw 14 moves forward, whereby a series of terminal fittings a is pushed out, and the feed cam 1 is moved.
When the follower roller 5 is swung to the vertical position and the follower roller 20 is engaged with the stop portion 17b of the cam groove 17, the advancement of the feed claw 14 is stopped. Is sent to the crimping position A.

When the elevating body 6 is further lowered, the barrels c and d are pressed between the anvils 3 and 4 and the crimpers 7 and 8, whereby the barrels c and d are crimped to the end of the electric wire f. At the same time, the bridge e between the crimped terminal fitting a and the terminal fitting a behind it is cut by the shear blade 12.

When the crimping and cutting are completed, the lifting and lowering body 6 moves up and back, whereby the crimpers 7, 8 and the shear blade 12 are retracted upward, and the feeding claw 14 is moved halfway along the reverse path. Follow and return to the original position. The terminal fitting a crimped during this time is taken out from the crimping position A, and the above operation is repeated by lowering the elevating body 6 again.
The crimping and cutting of the terminal fitting a are sequentially performed.

In this embodiment, the shape of the cam groove 17 formed in the feed cam 15 is improved. That is, as shown in FIG.
Stopper 17b that functions to stop 4 in the forward position
But, from the position where it entered a little from the entrance to the lower end,
It is formed on the left side of the drawing with a predetermined width, and a relief portion 17c is formed by the widened portion.

A second tension coil spring 30 is mounted between the feed cam 15 and the terminal holder 28 described above. More specifically, as shown in FIG. 3, a U-shaped receiving plate 32 is provided at the lower end of the right side surface of the feed cam 15 to receive the adjusting screw 22 of the adjusting member 23.
Mounting holes 3 in the lower leg of the receiving plate 32.
4 is opened, and a mounting hole 35 is also opened at the rear extension end of the terminal retainer 28.
No. 0 is mounted by hooking the hooks at both ends thereof in the mounting holes 34, 35.

Therefore, the second tension coil spring 30
1 urges the feed cam 15 around the shaft 16 in the counterclockwise direction in FIG. 1 so that the follower roller 20 is always in contact with the left side surface of the cam groove 17. I have.

This embodiment has the above-described structure,
Subsequently, the operation will be described. When the elevating body 6 descends from the state shown in FIG. 1, the follower roller 20 rolls along the feed portion 17a of the cam groove 17 as described above, so that the feed cam 15 swings clockwise, Feeding claw 14
Advancing along the guide plate 27, and further pushing the rear surface side of the wire barrel c of the terminal fitting a in the middle, a series of terminal fittings a is pushed out, and the follower roller 20 moves the cam groove 1
7 at the entrance of the stop portion 17b of the feed pawl 14
Is stopped, and during this time, the terminal fitting a is fed at a constant pitch, and the most advanced terminal fitting a is sent to the crimping position.

Thereafter, when the elevating body 6 is further lowered, both barrels c and d of the terminal fitting a at the crimping position A are pressed between the anvils 3 and 4 and the crimpers 7 and 8, and the terminal of the electric wire f is pressed. 5A, the barrels c and d are crimped, and as shown in FIG. 5A, the bridge e between the crimped terminal fitting a and the terminal fitting a behind it is cut by the shear blade 12. Is done.

During this time, as shown by the chain line in FIG. 4, when the follower roller 20 enters the relief portion 17c of the cam groove 17, the feed cam 15 is moved to the second tension coil spring 30.
The follower roller 20 receives the elasticity of
1 is pivoted in the counterclockwise direction in FIG. Therefore, the follower roller 20 that has entered the escape portion 17c rolls on the left side surface of the escape portion 17c thereafter. Then, as the feed cam 15 swings counterclockwise by a predetermined angle, the feed claw 14 is positioned behind the wire barrel c of the terminal fitting a, as shown by the chain line in FIG. To a predetermined dimension. As a result, a series of terminal fittings a
Is retracted, so that retreat is allowed.

When the crimping and cutting of the terminal fitting a at the crimping position A are completed as described above, the lifters 6 are raised and moved back, so that the crimpers 7, 8 and the shear blade 12 are retracted upward. While the follower roller 20 rolls the relief portion 17c of the cam groove 17, the feed claw 14 is retracted from the advance position by a predetermined dimension. ), The next terminal fitting a is driven backward along the guide rail 2 together with a series of subsequent terminal fittings a to form the shear blade 1.
2 can be lifted while moving away from it. For this reason,
The insulation barrel d of the next terminal fitting a is not pulled up together and pressed against the stopper 37, thereby preventing the insulation barrel d from being deformed. In addition, shear blade 1
Even if the terminal fitting a is pulled up together by the rise of 2,
The contact of the insulation barrel d with the stopper 37 is very weak, and is not so large as to cause deformation.

The follower roller 20 enters the feed portion 17a of the cam groove 17 and moves upward while the lifting body 6 is being raised and lowered, so that the feed cam 15 swings counterclockwise in FIG. Then, the feed claw 14 is returned to the original retracted position. Subsequently, when the elevating body 6 is lowered again, the above operation, that is, the feeding of the terminal fitting a, and the crimping and cutting of the terminal fitting a at the crimping position A are repeatedly performed. Next, the terminal fitting a to be crimped
Can be fed in a regular shape, so that it can be fed smoothly without causing terminal clogging, and the crimping operation of the barrel can be performed properly.

As described above, according to the present embodiment, when the cutting of the bridge e between the crimped terminal fitting a and the next terminal fitting a is completed and the shear blade 12 retreats, the cam groove 17 The feed claw 14 at the forward position is retracted by a predetermined amount due to the function of the escape portion 17c, and the engagement with the terminal fitting a is released. Therefore, the shear blade 12 follows the subsequent terminal fitting a backward and separates. As a result, the insulation barrel d of the next terminal fitting a is not deformed by being pressed against the stopper 37. That is, since the barrel d can be prevented from being deformed before the terminal fitting a is sent to the crimping position A, the barrel d can be properly crimped and the terminal fitting a can be fed accurately and smoothly.

The retracting function of the feed claw 14 by a predetermined amount is achieved by forming a relief portion 17c at the stop portion 17b of the cam groove 17 and by moving the follower roller 20 to the relief portion 17c.
c for urging it to come into contact with the predetermined cam surface.
This can be realized only by providing the extension coil spring 30. That is, for the existing device, the feed cam 15 having the cam groove 17 having the escape portion 17c is replaced with the feed cam 15, and the mounting holes 34 and 35 are opened in the existing receiving plate 32 and the terminal retainer 28, and the second tension coil spring is opened. It can be easily dealt with simply by attaching 30.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention.

(1) In the above embodiment, the feed cam 1
In mounting the second tension coil spring 30 for oscillatingly biasing the terminal 5, the mounting is performed between the receiving plate 32 of the adjusting screw 22 and the terminal retainer 28, but the mounting position is not limited to the above. May be attached between the feed cam 15 and another fixed object.

(2) Contrary to the above embodiment, the cam groove may be provided on the lifting / lowering body side, and the follower roller may be provided on the feed cam side. (3) The present invention is not limited to the use of the cam device of the type in which the follower roller is fitted in the cam groove exemplified in the above embodiment, but other types such as those in which a follower is brought into contact with a circumferential cam. The same can be applied to a device using the above cam device.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing the entire structure of an embodiment of the present invention.

FIG. 2 is a front view of a feed cam.

FIG. 3 is a partial perspective view showing a swing biasing structure of a feed cam.

FIG. 4 is a front view showing the operation of the feed cam.

FIG. 5 is a schematic front view showing a cutting operation.

FIG. 6 is a schematic front view showing a cutting operation of a conventional example.

FIG. 7 is a perspective view showing a crimping failure state.

[Explanation of symbols]

 A: Crimp position a: Terminal fitting c: Wire barrel d: Insulation barrel e: Bridge f: Electric wire 2: Guide rail (guide) 3, 4, Anvil 6: Lifting body (driving body) 7, 8: Crimper (sandwich) 12) Shear blade (cutting blade) 14 ... Feeding claw (feeding member) 15 ... Feed cam (moved body) 17 ... Cam groove (cam surface) 17a ... Feeding part 17b ... Stopping part 17c ... Relief part 20 ... Follower roller (Cam follower) 30: Second tension coil spring (biasing means) 37: Stopper

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 43/055 H01R 43/048

Claims (3)

(57) [Claims] 1. A terminal member formed in a chain in the vertical direction is intermittently advanced at a constant pitch by a feed member driven forward and backward by a cam device, and the most advanced terminal metal is sequentially fed to a crimping position. Then, while clamping the barrel by pressing the barrel between the upper and lower molds, the cutting blade driven forward and backward cuts between the crimped terminal fitting and the terminal fitting behind it. In the terminal crimping device, the cam device releases the engagement of the feed member with the terminal fitting when the cutting blade completes cutting and retreats .
A terminal crimping apparatus characterized in that the terminal crimping device is configured to be retracted by a predetermined amount in a direction parallel to a feeding direction of the terminal fitting . 2. A guide body for feeding and guiding terminal fittings formed in a chain in the vertical direction, a driving body including a clamping die and a cutting blade, driven forward and backward, and a movable member including a feeding member. The provided driven body, a cam surface provided on one of the driven body and the driving body and having a feed portion and a stop portion, and the cam surface provided on the other of the driven body and the driving body. A cam follower to be engaged, at the time of advancement of the driving body, advance the feed member while the cam follower moves the feed portion of the cam surface, advance a series of terminal fittings by a predetermined pitch, and While feeding the terminal fitting to the crimping position, and while the cam follower moves the stop portion of the cam surface, while stopping the feeding of the terminal fitting by the feed member, the barrel is crimped by the clamping die, and the cutting is performed. Terminal crimped by the blade When the driving body retreats, the cam follower sequentially moves the stop portion and the feed portion of the cam surface, and moves the pinching die, the cutting blade and the feed member to the original position when the drive body is retracted. In the terminal crimping device that is caused to move backward, at the stop portion of the cam surface, at least when the cutting blade completes cutting and retreats, the driven body is allowed to move relatively while allowing relative movement of the cam follower. A terminal crimping device, wherein a relief portion is formed which functions to retreat and retreat the feed member by a predetermined amount in a direction parallel to a feeding direction of the terminal fitting . 3. The terminal crimping apparatus according to claim 2, further comprising an urging means for urging the cam follower in a direction in which the cam follower comes into contact with a relief portion of the cam surface.