JPH11164434A - Electric wire clamping mechanism of electric wire covering stripping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clamp an electric wire completely to stable torque without damaging coating of the electric wire by forming a clamp slide mechanism moving steplessly, and an electric wire clamping mechanism for generating fixed torque as a means for applying retaining force against stripping force to the electric wire. SOLUTION: An intended electric wire is set in a device by being passed through an electric wire insertion hole 1 of a clamp part. Operation is then started by a panel switch or the like, and a clamp motor 3 is rotated. A main gear 5 is rotated by the rotation of a driving gear 2 through a gear head 4 directly connected to the clamp motor 3. A spiral groove 6 is applied to the main gear 5, and a bearing 11 integrally formed with a clamp plate 12 is guided by the spiral groove 6. When the main gear 5 is rotated in a direction A, the spiral movement of the spiral groove 6 is changed into linear movement by the rotational movement of the bearing 11, and the clamp plate 12 moves toward the center of the clamp part electric wire insertion hole 1 along a slide groove 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire stripping apparatus for mechanically stripping an electric wire, and more particularly to an electric wire clamping mechanism capable of securely clamping an electric wire regardless of its size and material.

[0002]

2. Description of the Related Art A variety of electric wires such as a PVC electric wire and a rubber electric wire are used for wiring work using electric wires.
Then, in the wiring work, a work of peeling off the coating of the electric wire is always performed as preparation. When the wire stripping operation is performed by hand, a thin wire is aside from a thin wire, and when the wire is thick, the operation is very troublesome for an operator, and mechanization is required.

[0003] Conventionally used electric wire clamping mechanisms include:
Mostly, as shown in FIG. 6, the air cylinder 23 is mainly used to sandwich the electric wires from both sides. According to this structure, the clamping force is determined by the pressure of the air, and the structure is arbitrarily determined. It was not possible to adjust the clamping force.

[0004] Japanese Patent Application Laid-Open No. Hei 7-1995 in which the clamping force can be adjusted arbitrarily
Referring to the example of Japanese Patent No. 15821, it has a structure as shown in FIG. 5, and the power transmission system is constituted by a clamp claw for securely holding the electric wire and a torque holding mechanism for generating a constant torque to the clamp claw portion. The clamp pawl and the torque holding mechanism are connected by a belt via a driven pulley and a driven pulley, respectively. According to this configuration, a stable torque can always be generated irrespective of the outer diameter of the electric wire. The holding mechanism is structurally complicated and expensive.

[0005]

As described above, in the prior art shown in FIG. 6, since the clamping force is determined by the pressure of the air, the material of the coating such as an electric wire using a coating having a low strength or a soft material is used. In some cases, the clamp portion cuts into the coating more than necessary, and the clamping force also fluctuates due to fluctuations in air pressure, making it difficult to always maintain a stable clamping force.

On the other hand, the one disclosed in Japanese Patent Application Laid-Open No. 7-15821 corresponds to all kinds of coating materials, and is excellent in always generating a stable torque irrespective of the cable outer diameter. , Relatively hard coating,
In order to match the strength to the cable that is difficult to clamp, the soft coating could be damaged. Further, the torque holding mechanism is expensive. Further, mechanical adjustment is required to adjust the pinching torque of the electric wire according to the material.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wire clamping mechanism of a wire coating peeling device capable of securely clamping with a stable torque without damaging the wire coating.

[0008]

The object of the present invention is to provide an electric wire coating stripping apparatus for mechanically stripping the coating of various electric wires, as means for applying a holding force against the peeling force to the electric wires, This is achieved by a clamp slide mechanism having a clamp claw that moves steplessly, and an electric wire clamp mechanism having a torque generating function of generating a constant torque irrespective of the clamp position of the clamp claw.

[0009]

1 and 2 are schematic views of a clamp claw slide mechanism and a torque generation control circuit according to an embodiment of the present invention.

The clamp slide mechanism comprises two clamp plates 12 for clamping an object electric wire,
2, a driving clamp motor 3 for driving the motor 2, a gear head 4 for transmitting forward and reverse torque, a clamp guide plate 8 for guiding the drive gear 2, the main gear 5, and the clamp plate 12 in the core direction of the target electric wire. In the vicinity of the clamp plate 12, an electric wire insertion hole 1 for a target electric wire is provided, and the target electric wire inserted in the electric wire insertion hole 1 is clamped and released.

A bearing 11 is mounted on the clamp plate 12 and guided by a spiral groove 6 provided on the main gear 5 and a guide groove 10 provided on the clamp guide plate 8. The clamp motor 3 is connected to a drive gear 2 via a gear head 4, and the drive gear 2 is connected to a main gear 5.

FIG. 2 shows a clamp motor and a clamp control circuit for controlling the same.

A phase control circuit 15 is connected to the clamp motor 3 so that a constant voltage is applied to the clamp motor 3. Further, a torque adjusting knob 14 is attached to the phase control circuit 15 so that the torque can be arbitrarily set. A scale is provided on the torque adjustment knob 14 so that the set torque amount can be visually confirmed.

Further, the configuration of the present apparatus will be described in more detail, and its operation will be described.

In FIG. 1, an object electric wire is set in the apparatus by passing through an electric wire insertion hole 1 of a clamp portion. After the setting is completed, the operation is started by, for example, a panel switch or a foot switch, and the clamp motor 3 is rotated. When the drive gear 2 rotates via the gear head 4 directly connected to the clamp motor 3, the main gear 5 connected to the drive gear 2 rotates.

As shown in FIG. 1, a spiral groove 6 is formed in the main gear 5, and a bearing 11 integral with the clamp plate 12 is guided in the spiral groove 6.

The clamp plate 12 is fitted into the slide groove 10 of the clamp plate guide plate 8, and both sides thereof are guided. When the main gear 5 rotates in the direction (A), the helical motion of the helical groove 6 changes to a linear motion due to the rotational motion of the bearing 11, and the clamp plate 12 moves along the slide groove 10 to the center of the clamp portion electric wire insertion hole 1. Move towards.

As shown in FIG. 1, if two clamp plates 12 are arranged at a pitch of 180 °, the target electric wire is securely clamped at two points, regardless of the size of the electric wire.

FIG. 2 shows a phase control circuit for generating a stable torque.

The phase control circuit 15 connected to the power supply is connected to the drive motor 3. Further, the opening and closing of the clamp mechanism is controlled by switching between forward and reverse rotation of the drive motor 3 by the forward and reverse rotation switch 19.

The phase control circuit 15 has a torque adjusting knob 1
4 is connected, and the torque can be adjusted and set by the torque adjusting knob 14 in a stepless manner.

FIG. 3 shows how the waveform of the power supply is controlled by the phase control. FIG. 3A shows a sine wave of the power supply and shows a case where a maximum torque is generated. This is an example in which a hard material is sandwiched. FIG. 3B shows a voltage waveform output by the phase control circuit, and it can be seen that torque is controlled by limiting the power supply to be applied. This is an example in which a cover made of a soft material or a material that is easily damaged is sandwiched.

As an application example of FIG. 4, the elasticity of the sheath 20 of various electric wires is detected by the elasticity detector 16 arranged at a position where it can come into contact with the sheath 20 of the electric wire 17, and the output thereof is received by the CPU 18 and the elasticity is detected. By controlling the phase control circuit 15 in response to a command from the CPU 18 in response, it is possible to automatically change the pinching torque corresponding to various electric wires. In this case, when the sheath of an electric wire made of a different material is frequently peeled off, the pinching torque can be adjusted by automatically adjusting the amount of phase control, thereby achieving a significant labor saving.

As described above, according to the present embodiment, it is possible to securely clamp the wire covering of various kinds of covering materials and sizes without damaging it. Further, when the material of the electric wire is changed, the torque can be easily adjusted by the torque adjusting knob. Further, by providing an elasticity detector, the torque can be automatically adjusted.

[0025]

According to the present invention, the following effects can be obtained.

The clamping mechanism is capable of adjusting and setting the optimum clamping torque according to the material and the size by changing the torque for clamping the electric wire, thereby securely clamping the electric wire without damaging the covering of the electric wire. Even if the shape and material of the electric wire are frequently changed, adjustment of only the torque adjustment knob is sufficient, which saves labor and is particularly effective in a market that handles a wide variety of electric wires that require frequent electric wire changes. It is.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of one embodiment of the present invention.

FIG. 2 is a schematic diagram of a phase control circuit.

FIG. 3 is a diagram showing control waveforms at the time of phase control of a clamp motor.

FIG. 4 is a diagram showing an application example when an elasticity detector is attached.

FIG. 5 is a diagram showing a conventional technology example.

FIG. 6 is a diagram illustrating a conventional technique example different from FIG. 5;

[Explanation of symbols]

1 ... wire insertion hole, 2 ... drive gear, 3 ... clamp motor,
4 gear head, 5 main gear, 6 helical groove, 7 screw, 8 guide plate, 9 base plate, 10 base plate
Slide groove, 11 ... Bearing, 12 ... Clamp plate, 1
3: Torque adjustment circuit, 14: Torque adjustment knob, 15: Phase control circuit, 16: Elasticity detector, 17: Electric wire, 18: C
PU, 19: forward / reverse switch, 20: coating, 21:
Core wire, 22: elasticity detection circuit, 23: air cylinder, 2
4: Clamp claw.

Claims (5)

[Claims] In a wire coating stripping apparatus for mechanically stripping the coating of various wires, a clamp claw that moves steplessly in the core direction of the wire is provided as means for applying a holding force to the wire against the peeling force. An electric wire clamp mechanism having a clamp slide mechanism having a torque generating function of generating a constant torque irrespective of a clamp position of the clamp claw. 2. The clamp slide mechanism according to claim 1, wherein the clamp pawl is guided by a guide groove provided on a guide plate, and a bearing attached to the clamp pawl is inserted into a spiral groove of a main gear. An electric wire clamping mechanism, characterized in that the rotation of the main gear causes the clamp claws to move in the core direction of the electric wire along the guide groove of the guide plate. 3. An electric wire clamping mechanism according to claim 1, wherein said torque generating function includes a control circuit for controlling a motor applied voltage as a means for clamping with a constant torque. 4. The control device according to claim 1, wherein the torque generating function includes a control circuit for arbitrarily adjusting and setting a pressing force of the wire clamp claw by voltage control as means for generating a constant holding force. An electric wire clamp mechanism characterized in that an adjustment amount is arbitrarily set visually on a scale by a knob. 5. The torque generating function according to claim 1, further comprising: an elasticity detector for automatically detecting the elasticity of the electric wire covering, recognizing a phase control amount from the elasticity, and automatically controlling the torque. An electric wire clamp mechanism characterized in that it has a variable configuration.