JPH0564329A - Linear substance clamp device of wire extender - Google Patents

Abstract

PURPOSE:To provide the clamp device of a wire extender which can be constituted light and compact without needing a driving source or a driver such as air pressure, etc. CONSTITUTION:This linear clamp device 4 is equipped with a reciprocating drive means 3, a frame 14 driven by the drive means 3, a supporter 15 provided in the frame 14, and an eccentric cam 16 being mounted rotatably on the frame 14 so that it may catch the linear substance 17 to be elongated between the supporter 15 and itself. And it is constituted such that the eccentric cam 16 is rotated into the position where it bytes the linear substance 17 by the drive in one direction of the frame 14 and that the eccentric cam 16 is rotated to the position where it sets the linear substance 17 free of sliding by the driving in the opposite direction of the frame 14, in the condition that it catches the linear substance 17 to be elongated between the supporter 15 and the eccentric cam 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear body clamp device for a wire drawing machine used for laying a linear body such as an electric cable on an extended line such as a tray or a ladder, and more specifically, a clamp. The present invention relates to a simple linear body clamp device that does not require a power source such as air pressure or a driving body for operation.

[0002]

2. Description of the Related Art Conventionally, when a linear body such as an electric cable is laid on an extension line such as a tray or a ladder, a wire extension machine is generally used for the purpose of labor saving and efficiency improvement. A conventional wire drawing machine is configured such that a reciprocating driving means is provided in a main body detachably attached to a wire extension, and a clamp device for detachably gripping a linear body is attached to the driving means. The clamp device is configured to clamp and hold the linear body only when the drive means moves in one direction. Therefore, the linear body gripped by the clamp means is intermittently moved in one direction every time the driving means reciprocates. The conventional clamp device is driven by a hydraulic or pneumatic fluid pressure cylinder, or a driving body such as an electric actuator.

[0003]

However, the conventional clamping device using such a driving body requires a fluid source and a power source, and also operates a driving body such as a fluid pressure cylinder or an electric actuator and the like. It was necessary to add a solenoid valve and control circuit to the wire drawing machine. Therefore, there is a problem that the weight and the outer shape of the apparatus are large and the cost is high. Further, when the electric actuator is used, the gripping speed of the linear body is low, and when the fluid pressure cylinder is used, there is a problem that the piping hose and the like are laid around. Therefore, in view of such problems of the clamp device in the conventional wire drawing machine, the present invention has an object to provide a simple linear body clamp device that does not require a power source such as air pressure and a driving body. is there.

[0004]

A linear body clamping device of the present invention for solving the above-mentioned problems includes a reciprocating drive means, a frame driven by the drive means, and a support provided on the frame. And an eccentric cam rotatably attached to the frame so that a linear body to be extended can be held between the support and the support. Then, in a state where the linear body to be extended is sandwiched between the support and the eccentric cam,
When the frame is driven in one direction, the eccentric cam is rotated to a position where the linear body is bitten, and when the frame is driven in the opposite direction, the eccentric cam is rotated to a position where the linear body is slidable. It is characterized in that it is configured.

[0005]

The eccentric cam is rotatably attached to the frame so as to sandwich the linear body with the support. When the frame is reciprocally moved by the drive means while the linear body is held, the eccentric cam is reciprocally rotated due to friction at the contact surface with the linear body. When the frame is driven in one direction, the eccentric cam strongly pushes the linear body against the support body and rotates it to a position where it bites. In this state, the linear body is clamped between the eccentric cam and the support body and moves following the movement of the frame in one direction. When the frame is driven in the opposite direction to the above, the eccentric cam rotates to a position where it gently contacts the linear body. In this state, the linear body is not clamped, so that the linear body stops at that position without following the movement of the frame in the opposite direction. In this way, the linear body is intermittently moved in one direction every time the driving means reciprocates.

[0006]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 shows a state where the wire drawing machine according to the present invention is attached to a cable tray. The wire drawing machine 1 has a mounting means 2,
It is composed of a drive means 3 and a clamp device 4. The mounting means 2 has a mounting base 5 having an L-shaped cross section and a bracket 6 having an L-shaped cross section provided at a lower portion thereof. A pair of pressing members 7 each having a pressing pad attached to the tip end thereof are provided in a protruding manner on the vertical portion of the mounting base 5. A pressing member 8 having a pressing pad attached to its tip is slidably attached to the lower portion of the bracket 6, and locking means 9 is provided to the other end. The locking means 9 slides the pressing member 8 and locks the position,
Since this structure is well known in this field, detailed description thereof will be omitted.

The cable tray 10 comprises a bottom plate 11 and side plates 12 standing upright on both sides thereof. The pressing pad of the pair of pressing members 7 is pressed against one surface of the one side plate 12, and the pressing pad of the pressing member 8 is pressed against the other surface, whereby the wire drawing machine 1 is attached to the cable tray 10. There is. The driving means 3 is composed of, for example, a pneumatic cylinder 13 mounted on the upper surface of the mount 5. The pneumatic cylinder 13 is used as the driving means 3.
A solenoid valve for driving and driving the engine, an air pipe, a control device, and the like are added, but these are omitted in the drawing.
The clamp device 4 includes a frame 14 having a T-shaped cross section, a support 15 provided on the frame 14, and the frame 1.
4 has an eccentric cam 16 rotatably attached. The linear body 17 to be extended is sandwiched between the upper surface of the support body 15 and the lower surface of the eccentric cam 16. A plurality of recessed grooves (not shown) are formed at the bottom of the frame 14, and the recessed grooves are fitted to a plurality of protrusions (not shown) axially provided on the outer periphery of the upper portion of the pneumatic cylinder 13. As a result, the frame 14 is supported by the pneumatic cylinder 13 so as to be slidable in the axial direction.

A connecting plate 18 extends downward from the end of the frame 14.
The output rod 19 of the pneumatic cylinder 13 is bolted to the connecting plate 18. This causes the frame 14 to move following the reciprocating movement of the output rod of the pneumatic cylinder 13. 2 is an enlarged view of the clamp device 4, and FIG. 3 is a III-III sectional view thereof. The eccentric cam 16 has a mountain-shaped inclined surface 20 formed on the upper portion thereof and an arc-shaped cam surface 21 formed on the lower portion thereof. Further, a through hole is provided above the central portion thereof, and the eccentric cam 16 is rotatably supported by the frame 14 by a shaft 27 inserted through the through hole. A male screw is engraved on one end of the shaft 27, and a thumb screw 22 is screwed to the male screw. The thumbscrew 22 allows the eccentric cam 16 to be easily attached to and detached from the shaft 27 or replaced.
The through hole of the frame 14 on which the shaft 27 is supported is formed as an elongated hole in the vertical direction and can be slightly moved in the vertical direction, and the tip of the holding bolt 28 is fitted on the shaft 27 to fix the upper position. It contacts the upper surface of the coil spring 29. This prevents the shaft 27 from moving upward.

As shown in FIG. 3, a pair of nuts 25 arranged in the axial direction of the pneumatic cylinder 13 are fixed to the frame 14 above the eccentric cam 16, and a hollow adjusting bolt 26 is vertically attached to each nut 25. Is screwed to. A pin 24 is vertically movably installed at the lower end of the hollow adjusting bolt 26, and the closing body 3 is provided at the upper end thereof.
0 is fixed by the rotation stop pin 23. A fitting hole into which a hexagon wrench is fitted is formed on the upper surface of the closing body 30, and by rotating the fitting hole, the entire bolt 26 can be screwed to adjust the vertical position. A compressed coil spring 29 is internally provided between the closing body 30 and the pin 24 to urge the pin 24 downward.

Next, the operation of the wire drawing machine and its clamp device will be described. First, as shown in FIG. 1, a required number of wire drawing machines 1 are attached along the cable tray 10 at predetermined intervals by the respective attaching means 2. The eccentric cam 16 in the clamp device 4 of each wire drawing machine 1 has a size suitable for the diameter of the linear body 17 to be drawn in advance. Fine adjustment is possible by slightly moving the bolt 27 up and down. At this time, the shaft 27 is supported by the holding bolt 28 so as not to move upward. Next, as shown in FIG. 3, the eccentric cam is slightly moved in the direction in which the lower end projecting portion of the cam surface 21 is extended to incline the center line of the cam. FIG. 3 shows a state in which the linear body 17 moves in the arrow A direction. Then, in this state, the right adjustment bolt 26 is positioned slightly above the left adjustment bolt 26. Then, the tip of the right pin 24 is brought into contact with the right inclined surface 22 of the eccentric cam 16. At this time, the inclined surface 20 on the left side is separated from the tip of the adjustment bolt 26 on the left side. When the extending direction is reversed, the inclinations of the left and right bolts and the eccentric cam are opposite to those shown in FIG.

Next, each wire drawing machine 1 is provided with a linear body 17 to be drawn.
After being inserted and clamped between the eccentric cam 16 and the support body 15, operating air pressure is supplied to the drive means 3 to start reciprocating movement. The frame 14 in the clamp device 4 of each wire drawing machine 1 reciprocates following the movement. The eccentric cam 16 in the clamp device 4 is initially in the state shown in FIG. When the drawing direction is the direction A in FIG. 3, the frame 1
When 4 moves in the A direction, the eccentric cam 16 in the position as shown in FIG. 3 keeps the posture as it is, and strongly presses the linear body 17 with its tip to move it in the A direction while biting it. At that time, the eccentric cam 16 receives a clockwise rotational force due to a frictional force with the linear body 17 in contact with the eccentric cam 16. At the same time, due to the elastic force of the coil spring 26, a rotational force is applied to the eccentric cam 16 in the clockwise direction, and the cam surface 21 of the eccentric cam 16 bites on the upper surface of the linear body 17 to be extended, and the arrow A is surely applied. Move in the direction.

Next, the frame 1 is rotated by reversing the driving means 3.
When 4 is reversed (moved in the direction opposite to the A direction), conversely to the above, counterclockwise rotational force is applied to the eccentric cam 16 due to the frictional force with the linear body 17 in contact with it. The eccentric cam 16 pushes up the pin 24 and rotates counterclockwise. In this state, the eccentric cam 16 and the linear body 17 are disengaged from each other, so that the linear body 17 is not clamped but slidable with respect to the clamp device, and does not follow the movement of the frame 14 as it is. Maintain the position. Next, when the frame 14 is turned over again in the direction A, the eccentric cam 16 receives a rotational force in the clockwise direction again due to the frictional force with the linear body 17 in contact therewith. As a result, the eccentric cam 16 rotates clockwise and returns to the initial state described above. With the eccentric cam 16 as it is, the linear body 17 is strongly pressed by its tip end,
The linear body 17 is moved in the A direction while biting.

In this way, since the linear body 17 is clamped by the clamp device 4 only when the drive means 3 moves in one direction (direction A), the linear body 17 follows the reciprocating movement of the drive means 3. The wire is intermittently extended in one direction. In addition, A
When the wire is extended in the opposite direction, the eccentric cam 16 may be inverted from the state shown in FIG. 3 and attached, and the drive means 3 may be similarly driven. In this case, contrary to the above, only when the drive means 3 is moved in the opposite direction (direction opposite to the A direction),
Since the linear body 17 is clamped by the clamp device 4, the linear body 17 is intermittently extended in the opposite direction following the reciprocating movement of the driving means 3.

[0014]

EFFECTS OF THE INVENTION The clamp device for a wire drawing machine according to the present invention is lightweight and compact because it does not require a power source such as pneumatic pressure and a driving body unlike the conventional clamp device by having the above-mentioned structure. Can be configured.

[Brief description of drawings]

FIG. 1 is a diagram showing a state in which a clamp device of a wire drawing machine of the present invention is attached to a cable tray.

FIG. 2 is a partially enlarged view of the clamp device shown in FIG.

3 is a sectional view taken along line III-III in FIG.

[Explanation of symbols]

 1 wire drawing machine 2 mounting means 3 driving means 4 clamp device 5 mounting base 6 bracket 7 pressing member 8 pressing member 9 locking means 10 cable tray 11 bottom plate 12 side plate 13 pneumatic cylinder 14 frame 15 support body 16 eccentric cam 17 linear body 18 Connection plate 19 Output rod 20 Inclined surface 21 Cam surface 22 Thumbscrew 23 Lock pin 24 Pin 25 Nut 26 Adjustment bolt 27 Shaft 28 Presser bolt 29 Coil spring 30 Closure body

Claims (1)

[Claims] 1. A reciprocating driving means 3, a frame 14 driven by the driving means 3, a support body 15 provided on the frame 14, and a linear body to be extended between the support body 15. An eccentric cam 16 rotatably attached to the frame 14 so that the linear member 17 to be extended is sandwiched between the support member 15 and the eccentric cam 16. When the frame 14 is driven in one direction, the eccentric cam 16 is rotated to a position where the linear body 17 is bitten, and when the frame 14 is driven in the opposite direction, the eccentric cam 16 is slidable on the linear body 17. A linear body clamping device for a wire drawing machine, wherein the linear body clamping device is configured to be rotated to a position.