JP2595041Y2 - Raising and lowering device of wire clamping claw in terminal crimping machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a terminal crimping machine for crimping a terminal to an electric wire whose cut end is stripped, and in particular, an electric wire for clamping an electric wire near a terminal crimping portion. The present invention relates to a holding claw elevating device.

[0002]

2. Description of the Related Art In a terminal crimping machine, as shown in FIG. 3, a terminal t is placed on a crimping bed a while a wire w is held at a height h from a lower frame f by a wire holding claw k. The terminal t on the crimping bed a was crimped to the electric wire w by the downward movement of the crimping die b.

[0003]

However, when the above-mentioned crimping die b descends while pushing down the electric wire w, since the electric wire w is firmly held by the electric wire holding claw k, as shown in FIG. It curves into an S shape.

[0004] This is a caulking position of the coating s by end tongues l ₁ terminal t the tip portion of the wire w is shifted d from the normal position, the crimping position of the core wire c by the intermediate portion tongue l ₂ And the terminal crimping process cannot be performed accurately. In order to solve such a problem, there has been provided an apparatus in which the electric wire is lowered in conjunction with the downward movement of the crimping die.

[0005] However, this interlocking type is, for example, one that pushes down an electric wire with an attachment that moves down integrally with a crimping die, or that can be operated with this electric signal by extracting the movement of the crimping die with an electric signal. There is a thing that pulls down the electric wire by a simple solenoid, but in the former, the attachment protrudes to the working side of the terminal crimping machine and interferes with the worker, and in the latter, the solenoid is different from the driving device of the crimping die, There was a problem that a stable synchronous operation was not performed due to an operation delay.

In view of such conventional circumstances, the present invention is designed so that the downward movement of the crimping dies and the downward movement of the wire clamping claws prior to the downward movement of the crimping dies can be linked with a simple structure. It is an object of the present invention to provide a lifting device for a wire clamping claw in a terminal crimping machine.

[0007]

According to the present invention, an end of an electric wire held by an electric wire clamping claw is formed on a crimping bed by a crimping die which is lowered from a position above the electric wire clamping claw by rotation of a rotating shaft. In the terminal crimping machine adapted to be crimped to the arranged terminals, an elevating body integrally attached to the electric wire holding claw in a state of being urged upward, and the rotating shaft being integrated with the rotating shaft. And an interlocking mechanism that converts the rotational motion of the cam into a linear motion so that the elevating body moves up and down in conjunction with the lifting and lowering of the crimping dies due to the rotation of the rotating shaft. And the cam and the interlocking mechanism lower the elevating body prior to lowering of the crimping die, and hold the elevating body at the lowered position until crimping of the terminal to the electric wire by the crimping die is completed.
In addition, the interlocking mechanism is configured to be adjustable so that the elevating position of the elevating body with respect to the pressure bonding die is changed.

[0008]

With the lifting device for the wire clamping claws in the terminal crimping machine of the present invention, when the crimping die is lowered by the rotation of the rotating shaft, the rotation of the cam attached to the rotating shaft causes
The raised body integrated with the electric wire holding claws is also lowered. In this case, the cam and the interlocking mechanism lower the lifting / lowering body prior to the lowering of the crimping dies.Therefore, the wire holding claw integrated with the lifting / lowering body holds the electric wire in advance of the crimping dies. It is lowered so as to be positioned with respect to the terminal on the crimping bed. In such a state, the crimping dies are lowered, and the terminals are crimped to the electric wires by the crimping dies. Also in this case, the cam and the interlocking mechanism continue to lower the elevating body so that the electric wire holding the electric wire holding claw is positioned on the crimping bed. Then, when the crimping dies rise after the crimping of the terminal to the electric wire by the crimping dies, the cam raises the elevating body to raise the wire holding claws. Then, when the wire holding claws urged upward reach a predetermined height position, the lifting of the wire holding claws stops, and further, the crimping dies are further raised, so that the wire holding claws are held by the wire holding claws. Even if the electric wire is engaged with the crimping die, the engaged state is canceled. Interlocking mechanism
Is the lifting position of the lifting body, that is, the lifting position of the wire gripping claw.
The terminal is adjustable so that the position can be changed.
The lifting position of the lifting body is adjusted according to the
Wire pinched by wire pinching claw to terminal on bed
Is adjusted.

Therefore, the terminal is crimped to the correct crimping position of the electric wire by the crimping die.

[0010]

An embodiment of the present invention will be described below with reference to the drawings.

The lifting / lowering device 1 for the electric wire holding claws 21 shown in FIG.
When the terminal T is crimped to the electric wire 22,
Is sent to a crimping position (solid line position in FIG. 2) adapted to the terminal T by the downward movement of the wire clamping claws 21 before stopping at the crimping position until the crimping of the terminal T by the crimping die D is completed. It was made to do.

That is, a cam 3 is provided on a rotating shaft 2 such as a crankshaft, etc., on which a crimping die D is driven to move up and down. On the other hand, an electric wire clamping claw 21 for clamping an electric wire 22 is moved in the ascending direction. Lifting body 4 urged to support
An interlocking mechanism 5 is provided between the elevating body 4 and the cam 3 so as to move the wire clamping claw 21 up and down in conjunction with the elevating operation of the crimping die D.

When the crimping die D is located at the bottom dead center, the elevating body 4 descending together with the wire clamping claw 21 moves the cam 3 down until the crimping die D completes the crimping of the terminal T. Cam surface so that it does not rise from the end position
3a is formed, so that the electric wire 22 is in the crimping position.
The lifting body 4 is kept at its lower end position so as to keep stopping.
Be held.

The lifting body 4 comprises a Z-shaped auxiliary member 6 and a compression spring 8 interposed between the auxiliary member 6 and the guide frame 7. The auxiliary member 6 is slidably held by a guide frame 7 that rises from an end of the lower horizontal portion 6a that can abut on a pull-down cam follower 14 of the interlocking mechanism 5 described later. It comprises a vertical portion 6b and an upper horizontal portion 6c extending laterally from the upper end of the vertical portion 6b and supporting the electric wire clamping claws 21.

The interlocking mechanism 5 comprises an upper balance arm 9, a lower balance arm 10, and a connecting rod 11.

The upper balance arm 9 has an interlocking cam follower 12 at the end (the right end in FIG. 1) and is supported by a fulcrum shaft 13. The lower balance arm 10 has a lowering cam follower 14 at the end. It is supported on a shaft 15.

The connecting rod 11 has both ends at the base ends of the upper balance arm 9 and the lower balance arm 10 (left end in FIG. 1).
The parts are connected by pins 16 and 17, respectively, and an adjusting screw 18 for adjusting the distance between the pins 16 and 17 is provided in the middle part. The adjustment screw 18
Therefore, the distance between the pins 16 and 17,
The length of the tie 11 is changed. With this, the crimping die
Position of the lifting / lowering body 4 with respect to
1 is adjusted. The adjusting screw 18 is provided with a tension spring 19 for urging the upper balance arm 9 and the lower balance 10 in a counterclockwise direction (a direction in which the interlocking cam follower 12 is pressed against the cam surface 3a).
The terminal T, the end tongues L ₁ for caulking a coating 22a of the wire 22, intermediate tongue for crimping the core wire 22b L
₂ are formed.

Next, the operation of the above embodiment will be described.

After the electric wire 22 is cut to a predetermined length, the sheath 22a is stripped so that the core wire 22b is exposed at an appropriate length, and the electric wire 22 is pinched by the electric wire holding claws 21, so that the rotating shaft 2 is driven. You.

The rotation of the rotating shaft 2 causes the pressing die D
Is about to start the downward movement, the cam 3 rotates at the same time as the rotating shaft 2, and the downward movement of the wire holding claws 21 is preceded.

That is, the interlocking cam follower 12 is depressed by the movement of the cam surface 3a, and this depressing operation is interlocked with the operation of lowering the pulling down cam follower 14 via the connecting rod 11. When the lifting / lowering body 4 is pulled down together with the wire holding claws 21 by this interlocking action, the wire 22 is lowered to the crimping position (the solid line position in FIG. 2) with the terminal T placed on the crimping bed B, and the crimping preparation is completed. .

Subsequently, when the crimping die D descends and the terminal T on the crimping bed B is crimped to the electric wire 22, the electric wire 22 is placed at the crimping position by the downward movement of the electric wire holding claw 21. In addition, even if a strong pressing force of the crimping die D is received, there is no possibility that the terminal T is displaced.

[0023] Therefore, the caulking coating 22a painter wire at the terminal T the end tongues L _1, the intermediate portion tongue L ₂
The core wire 22b is swaged to perform accurate terminal crimping.

After the crimping operation of the terminal T is completed, the crimping die D
Starts moving upward, the electric wire holding claws 21 return to the original position (the electric wire carry-in position shown by the solid line in FIG. 1) by the repulsive force of the compression spring 8 of the elevating body 4. Further, the interlocking mechanism 5 also includes a tension spring 19.
To the original position (the position indicated by the solid line in FIG. 1). Therefore, after the lifting of the wire holding claws 21 stops,
By raising the crimping die D, even if the wire held by the wire clamping claws 21 is engaged with the crimping die D, the engaged state is released and the wire clamping claws 21 are released. Is stably supplied to the next step.

[0025]

[Effect of the Invention] The lifting device for the wire clamping claws in the terminal crimping machine according to the present invention is such that the wire clamping claws are lowered prior to the descent of the crimping dies, and the crimping of the terminals by the crimping dies is completed. During this time, the electric wire holding claws continue to descend, so that the electric wire held by the electric wire holding claws does not bend, and the terminals at the ends of the electric wires are securely and stably. Is crimped. Furthermore,
Even if the crimped wire of the terminal is in a state of being engaged with the crimping die, since the engaged state is canceled, the crimped wire of the terminal can be stably supplied to the next step. .

Therefore, there is an excellent advantage that the quality of the product in the terminal crimping step is greatly improved. And mosquitoes
The interlocking mechanism that converts the rotational motion of the system into linear motion is adjustable
Of the lifting body with respect to the crimping die
The position, that is, the position of the wire gripper
To raise the wire according to the shape of the terminals on the crimping bed, etc.
Lowering position can be changed, crimping of terminal to electric wire
Work can be performed stably.

[Brief description of the drawings]

FIG. 1 is a schematic view of a terminal crimping machine provided with a lifting device for an electric wire holding claw.

FIG. 2 is an explanatory diagram of an operation of an electric wire holding claw by a lifting device.

FIG. 3 is an explanatory diagram immediately before terminal crimping in a conventional example.

FIG. 4 is an explanatory view of a conventional example immediately after terminal crimping.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elevating device 2 Rotating shaft 3 Cam 4 Elevating body 5 Interlocking mechanism 21 Electric wire holding claw 22 Electric wire D Crimping die T Terminal

Claims (1)

(57) [Scope of request for utility model registration] 1. An end of an electric wire held by an electric wire holding claw is crimped to a terminal arranged on a crimping bed by a crimping die lowered from a position above the electric wire holding claw by rotation of a rotating shaft. In the terminal crimping machine having the above structure, an elevating body integrally attached to the electric wire holding claw while being urged upward, and an elevating body attached to the rotating shaft so as to rotate integrally with the rotating shaft. And an interlocking mechanism that converts the rotational motion of the cam into a linear motion so that the elevating body moves up and down in conjunction with the elevating and lowering of the pressure bonding die due to the rotation of the rotating shaft. The interlocking mechanism lowers the lifting / lowering body prior to lowering of the crimping die, and holds the lifting / lowering body in the lowered position until crimping of the terminal to the wire by the crimping die is completed.
In addition, the interlocking mechanism is configured to be adjustable so that the elevating position of the elevating body with respect to the crimping die can be changed, and the lifting device for the wire clamping claws in the terminal crimping machine.