JPH06226574A - Clamp device for bar member - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a clamp device that can clamp a rod-shaped member that is difficult to work by picking it with a finger in a stable state without damaging it. [Structure] A fixed block for clamping and a movable block for clamping are provided with a sandwiching portion corresponding to the outer shape of the object to be sandwiched on the opposing surfaces thereof, and the movable block for clamping is moved by rotating an eccentric shaft. The sandwiching portion allows the sandwiching surface at the time of clamping to come into contact with and be pressed substantially evenly over the entire sandwiching portion, so that the entire sandwich is stably sandwiched and the outer peripheral surface of the sandwiched object is scarcely scratched. Not attached.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to maintenance, repair or adjustment of a rod-shaped member such as a tubular body or a columnar body such as a one-way clutch for supplying a wire material in one direction.
The present invention relates to a clamp device for holding in a stable state.

[0002]

2. Description of the Related Art Generally, for example, a vise jig is used as this type of clamp device. This vise has a non-slip (concavo-convex or jagged) processing on the clamping surface in order to perform stable clamping, and strongly clamps the outer peripheral surface of the rod-shaped member at the non-slip processed part. There is.

The one-way clutch is, for example, as shown in FIGS.
It has a structure as shown in FIG. That is, the cylindrical main body 1
And three hard balls 2 and pushers 3 housed in the main body
And the spring 4 and the screw 5 screwed into the inner side of the end of the main body 1.

One end of the main body 1 is closed by a wall surface 1a,
A hole 1b through which a wire material is inserted is provided in the center of the wall surface, and the inside of the wall surface 1a is formed as a tapered surface 1c. A female screw 1d is engraved on the inner wall surface of the other end.

The hard sphere 2 housed inside the main body 1 contacts the tapered surface 1c, and the hard sphere 2 is pressed by the spring 4 via the pusher 3. The strength of the spring 4 is adjusted by the screw 5. To do.

The one-way clutch having such a structure is
The function of the hard sphere 2 may be lost or slipped due to dust or metal powder such as burrs brought in by the passage of the wire material, and its function may be lost, which often requires maintenance and inspection. The pressing force of the spring 4 must be finely adjusted depending on the type of wire material used.

For that purpose, it is necessary to remove the screw 5 from the main body 1, disassemble and take out the member housed inside and clean the inside, but the main body 1 itself is cylindrical and the lubricity is improved. For this reason, if it is made of, for example, molybdenum or the like, it is difficult to pinch it with a finger, which not only makes the disassembly and cleaning work difficult, but also makes it difficult to finely adjust the spring. Therefore, a proper clamping device is required in this type of industry.

[0008]

When the rod-shaped member is pressed and clamped by a vise in which slipping is applied to the clamp surface in the above-mentioned conventional example, in order to clamp the bar member in a stable state, a considerable amount of the clamp surface is required. It is necessary to apply a clamping pressure, which causes scratches or marks due to the clamping on the outer peripheral surface of the rod-shaped member.

When the disassembling and cleaning work is repeatedly carried out, not only the outer peripheral surface of the rod-shaped member is covered with scratches but also it cannot be assembled in a precise mechanical device. Therefore, the conventional example has a problem that must be solved in that stable clamping is performed without damaging the outer peripheral surface of the rod-shaped member.

[0010]

As a concrete means for solving the above-mentioned problems of the prior art, the present invention provides a fixed block for clamping and a movable block for clamping so as to face each other, and an object to be sandwiched between these facing surfaces. The clamp device for a rod-shaped member is characterized in that a clamping portion corresponding to the outer shape of the clamp movable block is provided, and the movable block for clamping is moved to a tightening and open position by rotating an eccentric shaft. The drive lever is attached to the outer peripheral surface of the shaft so as to be rotationally driven, and the bearing position of the eccentric shaft is adjusted to adjust the clamping pressure by the clamping action.

[0011]

[Function] By providing the sandwiching portion corresponding to the outer shape of the object to be sandwiched on the opposing surfaces of the fixed block for clamping and the movable block for clamping, the sandwiching surface at the time of clamping is evenly distributed over the entire sandwiching portion. It comes into contact with and is pressed, the whole is stably sandwiched, and the outer peripheral surface of the sandwiched object is scarcely scratched.

[0012]

Next, the present invention will be described in more detail with reference to the illustrated embodiments. In the first embodiment shown in FIGS.
Reference numeral 1 denotes a main body base, on which a fixed block 12 for clamping and a movable block 13 for clamping are provided so as to be united and separated from each other.

One of the clamp fixing blocks 12 is fixed to the main body base 11 by an appropriate means, and a plurality of parallel guide holes 15 formed in the lateral direction are formed in the body of the main body base 11 and are inserted into the guide holes 15. Guide pin 14 is formed on the other side of the clamp movable block 13 in a planted state,
The guide hole 15 and the guide pin 14 allow the clamp movable block 13 to be united and separated from the clamp fixed block 12.

On the united surface of these two blocks, holding portions 16 and 17 corresponding to the external shape of the held object are formed. The holding portions 16 and 17 are formed in a half-moon-shaped concave portion corresponding to a columnar component to be clamped, and are formed in a corresponding rectangular concave portion if the component to be clamped is a polygonal prismatic column. To be done.

The clamp movable block 13 is guided by the guide pin 14 with respect to the clamp fixed block 12 and is disposed in a separated state, but is always biased and positioned in a separated state in the operation of the clamp. Is desirable. Therefore, for example, as shown in FIG.
A coil spring 18 may be fitted to the guide pin 14 and urged so that the clamp movable block 13 is always in a separated state.

As means for moving the clamp movable block 13 for clamping, an eccentric shaft 19 is arranged so as to abut against the back surface of the clamp movable block 13, and the eccentric shaft 19 is located at a predetermined position on the circumferential surface. It is operated by the drive lever 20 attached in the implanted state.

The eccentric shaft 19 is located at a position where the shafts 19a attached to both ends thereof are eccentric.
9a is a torque adjusting member 21 that also serves as a bearing on both sides.
Is bearing by. The bearing / torque adjusting member 21 is erected and fixed on the main body base 11.

Long holes 22 that are substantially parallel to the main body base 11 are provided at approximately the center of both bearing and torque adjusting members 21, and the long holes 22 are provided on the rear side (the side where the movable block 13 for clamping is not present-in the drawing). Torque adjusting bolts 23 are provided so as to penetrate from the left side).

The shafts 19a are loosely fitted in the long holes 22, and the tip ends of the torque adjusting bolts 23 come into contact with the shafts 19a to tighten or loosen the torque adjusting bolts 23. By setting the position of the shaft 19a, the amount of movement of the clamp movable block 13 by the eccentric shaft 19, that is, the clamp pressure can be finely adjusted.

In the second embodiment shown in FIG. 2, a relatively hard anti-slip material made of rubber, plastic, or the like is used for the sandwiching portions 16 and 17 of the clamp fixed block 12 and the clamp movable block 13. 16a and 17a are integrally attached by, for example, an adhesive means.

As described above, by attaching the anti-slip members 16a and 17a, even if the object to be sandwiched is clamped with a certain degree of strength, it is buffered by the elasticity of the anti-slip member, and a trace of strong pressure clamping on the outer surface of the object to be sandwiched. Is not left. In the figure, reference numeral 10 is a rod-shaped member, and 24 is a lower limit stopper of the drive lever 20.

In the clamping device of the present invention having the above-mentioned structure, the driving lever 20 is clamp-free when it is lifted upward as shown in FIG. Between the clamp fixed block 12 and the clamp movable block 13, between the sandwiching portions 16 and 17, the free end side of the drive lever 20 is pushed down to be stored between the two blocks. Tighten and clamp.

In this case, when the drive lever 20 is raised or lowered, the eccentric shaft 19 rotates about the shaft 19a, and as shown by the phantom line in FIG. The block 13 is moved forward, that is, moved to the clamp fixed block 12 side.

Then, the movable block for clamping 13
1, the rod-shaped member 10 is clamped between the clamping fixed block 12 and the clamping fixed block 12 as shown in FIG. 1, and the rod-shaped member 10 is processed in that state or disassembled for cleaning. Alternatively, various works such as delicate adjustment are performed.

After the work is completed, the drive shaft 2
When 0 is lifted upward, the eccentric shaft 19 rotates,
Movable block for clamping 1 due to eccentricity retreating
3 can be retracted by, for example, the repulsive force of the coil spring 18, and the pinched state of the rod-shaped member 10 can be released to easily pick it up.

[0026]

As described above, in the clamp device for a rod-shaped member according to the present invention, the fixed block for clamping and the movable block for clamping are arranged so as to face each other, and the outer surface of the object to be sandwiched is provided on these opposing surfaces. By providing a corresponding clamping unit and moving the clamping movable block to the tightening and opening position by rotating the eccentric shaft, the object to be clamped can be clamped by a simple operation and the entire surface of the clamping unit can be performed. Since the outer peripheral surface of the object to be clamped comes into contact with each other over and the local contact is eliminated, there is an excellent effect that no scratch or a trace of clamping is left on the outer peripheral surface of the object to be clamped.

Further, a drive lever is attached to the outer peripheral surface of the eccentric shaft so that the drive lever can be rotationally driven, and the bearing position of the eccentric shaft can be adjusted to adjust the clamping pressure by the clamping action. Thus, the object to be clamped can be easily clamped by one-touch with the drive lever, and the workability is facilitated, and the clamping pressure can be adjusted to always clamp under the optimum condition.

[Brief description of drawings]

FIG. 1 is a perspective view showing a usage state of a clamp device according to a first embodiment of the invention.

FIG. 2 is a cross-sectional view of a main part of the device.

FIG. 3 is a sectional view of only a main part of a second embodiment according to the present invention.

FIG. 4 is an exploded perspective view of a one-way clutch showing an example of a held object.

FIG. 5 is a cross-sectional view showing an enlarged main part of the sandwiched object.

[Explanation of symbols]

 10 Bar-shaped member 11 Main body base 12 Clamping fixed block 13 Clamping movable block 14 Guide pin 15 Guide hole 16, 17 Clamping part 16a, 17a Non-slip material 18 Coil spring 19 Eccentric shaft 19a Axis 20 Drive lever 21 Bearing and torque adjusting member 22 Long hole 23 Torque adjustment bolt 24 Lower limit stopper

Claims (3)

[Claims] 1. A clamp fixed block and a clamp movable block are disposed so as to oppose each other, and a clamping portion corresponding to the outer shape of an object to be clamped is provided on these opposing surfaces, and the clamp movable block rotates an eccentric shaft. A clamping device for a rod-shaped member, which is moved to a tightening and opening position by moving. 2. The clamp device for a rod-shaped member according to claim 1, wherein the drive lever is attached to the outer peripheral surface of the eccentric shaft in a state of being implanted. 3. Adjusting the bearing position of the eccentric shaft,
The clamping device for a rod-shaped member according to claim 1, wherein the clamping pressure by the clamping action can be adjusted.