KR100687555B1 - Clamp mechanism - Google Patents

Abstract

An object of the present invention is to provide a clamp mechanism capable of always moving a slide block in a predetermined direction when a clamp bolt is fastened to a slide block.

The clamp mechanism includes a slide base 2, a slide block 1 moving on the slide base 2, and a clamp bolt attached to the screw hole 1a of the slide block 1 via the clamp member 3 ( 15). The clamp metal member 3 has an adjustment hole 6 through which the clamp bolt 15 penetrates. The surface on the side of the head portion 5 of the clamp bolt 15 of the clamp metal member 3 is separated from the reference surface 3b and the head portion 5 below the adjustment hole 6 in close contact with the head portion 5. It consists of the step surface 3a higher than the adjustment hole 6.

Clamp Mechanism, Clamp Bolt, Clamp Member

Description

Clamp Mechanism {CLAMP MECHANISM}

1 is a view showing an embodiment of a clamp mechanism according to the present invention.

FIG. 2 is an enlarged view of the clamp mechanism shown in FIG. 1. FIG.

3 shows the action of the clamp mechanism.

4 is a view showing a conventional clamp mechanism.

※ Explanation of code about main part of drawing ※

1: slide block

1a: screw hole

2: slide base

3: clamp member

3a: step surface

3b: reference plane

3c, 3d: pressure surface

3g: end

3f: flat surface

4: stopper

5a, 5b: butting surface

6: adjusting hole

7: Dovetail Home

8: Dovetail Shape Guide

15: clamp bolt

t: step

The present invention relates to a clamp mechanism comprising a block having a screw hole and a clamp bolt attached to the screw hole of the block via a clamp member.

Background Art Conventionally, a fastening method using bolts has been widely used in the mechanisms of the world as a means to realize fastening of large loads with a small torque. When the bolt is fastened, the near side of the contact surface is bent due to the bending caused by the force applied when the torque is applied to the bolt at the contact surface between the head of the bolt and the block (fastened object), or the machining error of the bolt and the parallelism error of the contact surfaces. It may become nonuniform. In this case, the fastened object may move when the bolt is tightened.

As described above, the fastened object may move when the bolt is tightened, but the moving direction of the fastened object varies depending on the machining error of the contact surfaces, the method of applying a force to the spanner, or the direction of the force. Depending on the direction of movement, the clamp mechanism may be defective.

The present invention has been made in view of this point, and an object thereof is to provide a clamp mechanism capable of firmly fixing a block by moving the block in a desired direction when tightening a bolt.

The present invention has a block having a screw hole and a clamp bolt having a head attached to the screw hole of the block through the clamp member, the clamp member having an adjustment hole through which the clamp bolt penetrates, The face on the head side is a clamp mechanism comprising one face of an adjustment hole in close contact with the head of the clamp bolt and the other face of the adjustment hole forming a gap between the head of the clamp bolt.

The present invention is a clamp mechanism wherein a block having a screw hole is formed of a slide block that is movable over a slide base.

This invention is a clamping mechanism characterized by the adjustment hole of a clamp member being formed in elongate shape, and extending along the moving direction of a slide block.

The clamp mechanism is characterized in that the clamp member extends from the slide block to the slide base.

The present invention is a clamp mechanism wherein an end portion located between the slide block and the slide base is formed on the slide block and the surface of the slide base side of the clamp member.

The present invention is a clamping mechanism characterized in that a dovetail groove is provided on one of the slide base and the slide block, and a dovetail groove guide is engaged on the other of the dovetail groove.

The clamp mechanism according to the present invention is characterized in that the adjusting hole of the clamp member is formed of a circular hole.

The clamp mechanism according to the present invention is characterized in that the center of the adjusting hole coincides with a boundary line between one surface of the adjusting hole and the other surface of the adjusting hole.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to drawings, the Example of the clamp mechanism which concerns on this invention is described.

1 to 3 is a view showing an embodiment of a clamp mechanism according to the present invention.

Here, FIG. 1A is a front view of the clamp mechanism, FIG. 1B is a side cross-sectional view of the clamp mechanism shown in FIG. 1A, and FIG. 2A is FIG. 1A. 2B is a side cross-sectional view of the clamp mechanism shown in FIG. 2A, and FIG. 3 is a view showing the action of the clamp mechanism.

As shown in Figs. 1 to 3, the clamp mechanism is movably installed on the slide base 2 having the dovetail groove guide 8 and the slide base 2, and is engaged with the dovetail groove guide 8. A slide block (clamp object) 1 having a dovetail groove 7 and a clamp bolt 15 attached to the screw hole 1a of the slide block 1 through a clamp member 3 are provided. .

Among these, the clamp bolt 15 has the head part 5, and the clamp member 3 has a flat shape and the elongate adjustment hole 6 through which the clamp bolt 15 penetrates. This elongate adjustment hole 6 extends along the moving direction of the slide block 1 (left-right direction of Fig.1 (a)).

Moreover, the stopper 4 which the slide block 1 abuts orthogonal to the clamp member 3 is fixed to one end of the slide base 2.

The stopper 4 should just be provided facing the slide block 1, and does not need to be fixed to the slide base 2.

As described above, the dovetail groove 7 provided in the slide block 1 which is the clamp object engages with the dovetail shape guide 8 of the slide base 2, so that the slide block 1 is the slide base 2. The upper part is made to be movable in a slide. In addition, between the slide block 1 and the clamp member 3, when the end surface of the slide base 2 and the clamp member 3 are aligned, as shown in FIG.1 (b), a clamp bolt is carried out. At the position of the head part 5 of 15, the clearance gap of about 0.01 mm-about 0.1 mm is formed, for example. Moreover, the surface of the slide block 1 and the slide base 2 side in the clamp member 3 is the surface 3d which presses the side surface of the slide base 2, and the slide block 1 in the vicinity of the clamp bolt 15. The pressurizing surface 3c which presses the side surface of (), and it is located between the pressing surface 3c and the pressing surface 3d, and has the edge part 3g separated from the slide block 1 and the slide base 2 is provided.

In this manner, the clamp member 3 extends from the slide block 1 to the slide base 2, and an end portion 3g is provided on the surface of the slide block 1 and the slide base 2 side of the clamp member 3. Is formed.

As described above, the clamp member 3 is provided with an adjustment hole 6 of a long hole in the direction parallel to the dovetail-shaped guide 8, that is, in the moving direction of the slide block 1, and the adjustment hole 6. ), The clamp bolt 15 is screwed into the screw hole 1a of the slide block 1. When the slide block 1 slides over the slide base 2, the slide bolt 15 reciprocates in the adjustment hole 6.

In addition, as shown in Fig. 2 (a), (b), the surface of the clamp member 3 on the head 5 side of the clamp bolt 15 has a stepped surface located above the adjustment hole 6 ( 3a) and the reference surface 3b located under the adjustment hole 6 are provided.

In addition, in FIG.2 (a) (b), the step surface 3a upper side than the adjustment hole 6 of the clamp member 3 has the example with respect to the reference surface 3b lower than the adjustment hole 6, for example. For example, it is recessed with a slight step | step (gap) of about 0.01 mm-about 0.3 mm.

In addition, in FIG.2 (a) (b), the reference surface 3b of a clamp member turns into one surface of the adjustment hole 6, and the step surface 3a turns into the other surface of the adjustment hole 6. As shown in FIG.

Further, a boundary line 3P is formed between the stepped surface 3a and the reference plane 3b so that the center line (and center) of the adjustment hole 6 coincides with this boundary line 3P.

Next, the operation of the embodiment having such a configuration will be described.

As shown in Fig. 1 (a) and (b), the clamp bolt 15 is loosened from the screw hole 1a of the slide block 1 so that the slide block 1 is slidable on the slide base 2. The slide block 1 is pressed by manual or the like to slide on the slide base 2 in the right direction in FIG. 1A to abut the stopper 4. When the clamp bolt 15 is tightened while the slide block 1 is in contact with the stopper 4, a slight gap formed between the pressing surface 3c on the clamp bolt 15 side of the clamp member 3 and the slide block 1 is formed. The gap is filled by the elastic deformation of the end portion 3g of the clamp member 3, and the pressing surface 3d of the clamp member 3 is pressed against the slide base 2 side surface.

In this way, the slide block 1 is fixed on the slide base 2 by the clamp member 3 and the clamp bolt 15.

In the meantime, the head 5 of the clamp bolt 15, which is screwed into the screw hole 1a of the slide block 1 through the adjustment hole 6, is tightened before the reference surface 3b of the clamp member 3 is tightened. The contact surface 5a is formed only in close contact with each other, and is spaced apart from the step surface 3a of the clamp member 3 by a step t. When the clamp bolt 15 is rotated clockwise in this state and further tightened, the frictional force of the contact surface 5a which abuts against the reference surface 3b of the head 5 of the clamp bolt 15 is stepped surface 3a. It is certainly larger than the frictional force with the. For this reason, the rotational force which makes the contact surface 5a the point of contact with the clamp bolt 15 acts.

As described above, when the rotational force acts on the clamp bolt 15, the clamping force in the same direction as the rotational direction of the clamp bolt 15 is applied to the slide block 1 via the clamp bolt 15. In this case, since the dovetail groove 7 of the slide block 1 is fitted to the dovetail shape guide 8 of the slide base 2, the slide block 1 is the slide base 2. There is no going up and down. Moreover, since the clamp bolt 15 is regulated by the adjustment hole 6 of the clamp member 3, the moving force of the left-right direction shown to Fig.2 (a) generate | occur | produces in the slide block 1.

The moving force applied from the clamp bolt 15 to the slide block 1 in which the clamp bolt 15 is screwed together is a force for sliding the slide block in the direction of the stopper 4, and as a result, the slide block ( 1) is pressurized.

When the clamp bolt 15 is further tightened, as shown in FIG. 3, the head portion 5 of the clamp bolt 15 is elastically deformed so that the head portion 5 abuts on the step surface 3a and the clamp is completed. . In addition, since the step t of the step surface 3a is slightly about 0.01 mm to 0.3 mm (as described later, the step t can be appropriately set by the size of the clamp bolt 15 or the size of the head 5). The head 5 is not damaged by the elastic deformation of the head 5 of the clamp bolt 15.

In addition, by forming the step t of the step surface 3a, the contact surface 5a, which is in contact with the reference surface 3b, becomes a point, and the clamp bolt 15 rotates. As a result, the clamp bolt 15 (right screw) In the case of), the advancing direction of the slide block 1 is limited to the direction (right direction) toward the stopper 4 side as shown in Fig. 2A.

Next, the comparative example of this invention is demonstrated by FIG.4 (a)-(d). As shown in (a)-(b) of FIG. 4, when the surface 3f of the head part 5 side of the clamp bolt 15 of the clamp member 3 is uniformly flat, from the clamp bolt 15 It is considered that the moving force applied to the slide block 1 is not determined.

That is, as shown in (a)-(d) of FIG. 4, when the clamp bolt 15 is tightened in the clockwise direction, the flat surface 3f of both sides of the adjustment hole 6 of the clamp member 3 comes into contact with each other. As shown in FIG. 4C, the head portion 5 of the clamp bolt 15 becomes a point by the friction with the flat surface 3f of the clamp member 3. According to the fastening rotation (right turn) of the clamp bolt 15, the slide block 1 is advanced to press the stopper 4. On the other hand, as shown in Fig. 4D, when the upper contact surface 5b of the head portion 5 becomes a point by friction with the flat surface 3f of the clamp member 3, the clamp bolt 15 The slide block 1 is spaced apart from the stopper 4 in accordance with the tightening rotation. In this case, when the frictional force of the upper contact surface 5b wins the frictional force of the lower contact surface 5a, the slide block 1, which has been press-contacted to the stopper 4, stops as the clamp bolt 15 tightens the stopper. It is separated from (4), and positioning accuracy cannot be maintained.

The frictional force generated on the contact surfaces 5a and 5b of the head 15 also affects the roughness of the surfaces of the contact surfaces 5a and 5b, but also affects the torque load situation to the clamp bolt 15. Receive. That is, a method of applying torque to the clamp bolt 15 usually applies a cantilever-type spanner to the bolt, and then applies rotational force by pressurization from one side, but the pressing force at this time is the head portion 5 of the clamp bolt 15. The clamp bolt 15 is bent by the pressing force of the furnace. For example, the clamp bolt 15 of FIG. 4C is horizontally fitted with a rod spanner such that a force portion is provided on the right side, and the rod spanner is moved to the right with a force F from the horizontal position of the rod spanner. When it is going to rotate, the force F is added to the head part 5 of the clamp bolt 15 below. For this reason, the clamp bolt 15 is bent downward, and the contact surface 5a of the head 5 is pressurized further by this influence. Alternatively, on the contrary, when the spanner is fitted to the left side of the head 5 of the clamp bolt 15 so that the force portion is located, and the clamp bolt 15 is rotated in the right direction (the direction of the force is upward), the slide block 1 is reversed. The moving force applied to the force becomes stronger in the left direction.

On the other hand, according to the present invention, since the step t is provided so as not to affect even when the force F is applied, the moving force applied to the slide block 1 is always constant when the clamp bolt 15 is fastened. Direction, that is, the direction toward the stopper 4 can be determined. For this reason, by clamping the clamp bolt 15, the slide block 1 can be fixed to the slide base 2, and can also be reliably pressurized by the stopper 4. As shown in FIG.

In addition, although the adjustment hole 6 was demonstrated as an elongate shape, when the amount of movement of the slide block 1 becomes minimum, the adjustment hole 6 may be a circular hole which provided a margin. In addition, although the value of the step | step t when the cross section of the slide base 2 and the clamp member 3 were matched set the estimated value, the magnitude | size of the clamp bolt 15, the moving amount, the material or rigidity of a clamp member, or Needless to say, the size is appropriately changed.

According to the present invention, when the clamp bolt is fastened, one surface of the clamp member can be used as a contact surface with the head of the clamp bolt. For this reason, a rotational force can be applied to the clamp bolt by using one surface of the clamp member, and since the clamp bolt penetrates through the adjusting hole of the clamp member, it is always possible to apply a moving force in a constant direction from the clamp bolt to the slide block side. Can be.

Claims (8)

A block having a screw hole, A clamp bolt having a head attached to the screw hole of the block through the clamp member, The clamp member has an adjustment hole through which the clamp bolt passes; A clamping mechanism according to claim 1, wherein the surface of the head of the clamp bolt of the clamp member comprises a stepped surface located above the adjusting hole and a reference surface located below the adjusting hole. The method of claim 1, And the block having the screw hole is a slide block that is movable over the slide base. The method of claim 2, The clamping hole of the said clamp member is formed in elongate shape, and is extended along the moving direction of the said slide block, The clamp mechanism characterized by the above-mentioned. The method of claim 2, And the clamp member extends from the slide block to the slide base. The method of claim 4, wherein A clamp mechanism, wherein an end portion located between the slide block and the slide base is formed on the slide block and the surface of the slide base side of the clamp member. The method of claim 2, A dovetail groove is provided in one of the slide base and the slide block, and a dovetail groove guide is engaged in the dovetail groove in the other. The method of claim 1, The clamping mechanism of the said clamp member consists of a circular hole. The method of claim 1, The center of the said adjusting hole coincides with the boundary line between one side of the adjusting hole, and the other side of the adjusting hole.

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