JP3274870B2 - Support structure of clamp bracket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp fitting used mainly for fixing a mold to a machine body or for fixing a workpiece to a processing jig in a machine tool in an injection molding machine or a casting machine. It is about improvement.

[0002]

2. Description of the Related Art Generally, a clamp fitting used for this kind of application comprises a clamp plate and a fulcrum member whose upper surface is arc-shaped (camel-shaped). No. 42370). When the clamp is rotated around the clamp bolt to change the direction, the fulcrum member moves simultaneously with the clamp, so that the clamp plate can be operated in any direction. On the other hand, there is an advantage that the fulcrum member is not moved in the longitudinal direction on the clamp plate, because the fulcrum member interferes with the clamp plate.

[0003]

In order to facilitate the movement of the fulcrum member on the clamp plate, the length of the support bolt for suspending the fulcrum member may be set long. Not only is it difficult to use,
Conversely, there was a problem that the support position was changed unexpectedly.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to obtain a fulcrum structure in which a fulcrum is stable and easily movable. A fulcrum member 6 is supported at one end of a clamp plate 4 provided with a support member, and the other end of the clamp plate 4 is brought into contact with an object 3 to be fastened. A clamp member for fixing the fastening object 3 to the underframe 2 so as to be fastened and loosened, wherein the fulcrum member 6 is at least an upper member 6a disposed on the upper surface of the clamp plate 4 and a pillow member 6b disposed on the lower surface;
A lower surface of the upper member 6a in contact with the clamp plate 4 and an upper surface of the pillow member 6b in contact with the clamp plate 4 are orthogonal to the longitudinal direction of the clamp plate 4. It is characterized in that it is formed in an arc shape having an axis in the direction in which it moves.

[0005]

The fulcrum member 6 sandwiches the clamp plate 4 between the upper member 6a and the pillow member 6b and is loosely tightened by the elasticity of the spring 6f. Have been prevented from doing so. The fulcrum member 6 and the clamp plate 4 are in contact with each other on an arc-shaped surface formed on the opposing surface of the upper member 6a and the pillow member 6b, and the two are frictionally engaged with a small contact surface so that they do not move without permission. Movement is restricted to.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. In FIG. 1, reference numeral 1 denotes a clamp fitting according to the present invention, which fixes a mold 3 as an object to be fastened on an underframe 2 forming a bed of an injection molding machine or a die casting machine so as to be tightened and loosened. . The clamp 1 is formed in a rectangular strip shape, and has an iron clamp plate 4 having a central portion provided with a long hole 4a along the longitudinal direction, a clamp bolt 5 inserted into the long hole 4a, and one end of the clamp plate 4. Fulcrum member 6 locked to
And Then, the end on the side that does not support the fulcrum member 6 is brought into contact with the upper surface of the mold 3 and the clamp bolt 5 at the center is tightened to lock the mold 3 immovably, or loosened to detach the mold. Used to perform

Next, a structure for mounting the clamp bolt 5 and the fulcrum member 6 to the clamp plate 4 will be described. That is, the clamp bolt 5 is inserted into the elongated hole 4a via the pair of spherical washers 5a and 5b, and is screwed into the underframe 2.
A coil spring 1a is provided between the underframe 2 and the clamp plate 4 and acts to press the clamp plate 4 against the spherical washers 5a and 5b. Each of the spherical washers 5a and 5b has a flat surface, is in surface contact with the bolt head of the clamp bolt 5 and the clamp plate 4, and has a spherical surface on which the other surfaces slide mutually. That is, one has a concave surface,
On the other hand, convex surfaces are respectively formed, and both surfaces are formed as spherical surfaces having substantially the same radius, and are slidably engaged with each other.

A fulcrum member 6 supported at the other end of the clamp plate 4 elastically clamps the clamp plate 4 between an upper member 6a and a pillow member 6b. That is, the upper member 6a is made of a hard synthetic resin, for example, polypropylene, and passes through two left and right horizontal frame portions 6c each having an arc-shaped lower surface locked on the upper surface of the clamp plate 4 and the long hole 4a. It is formed in a substantially T-shape comprising a vertical frame portion 6d extending downward. The pillow member 6b is made of a quenched steel material, and the upper surface thereof has an arc-shaped upper surface that supports the lower surface of the clamp plate 4.

The two members 6a and 6b are connected by a support bolt 6h inserted into the vertical frame 6d via a gap 6e and a spring 6f. The size of the gap 6e is set smaller than the space for the clamp plate 4 formed between the arc-shaped lower surface of the upper member 6a and the upper surface of the pillow member 6b,
When the gap 6e is made zero, a space for the clamp plate 4 is left. Thus, the elasticity of the spring 6f constantly acts on the pillow member 6b, and the pillow member 6b is pulled up in a direction to narrow the gap 6e. Each of the two horizontal frame portions 6c, 6c and the circular arc-shaped member of the pillow member 6b The clamp plate 4 is configured to elastically press the surface with the surface.

A method of using the clamp shown in this embodiment will be described. First, a fulcrum member 6 is attached to the clamp plate 4 in advance, and is attached to the underframe 2 by a clamp bolt 5. First, the direction of the clamp plate 4 is changed by rotating the clamp bolt 5 as an axis to secure a space for mounting the mold 3 on the underframe 2. That is, the direction is changed by hand so that the clamp plate 4 is out of the space where the mold 3 is to be mounted. The clamp plate 4 is pressed against the lower surface of the bolt head of the clamp bolt 5 by the coil spring 1a on the lower surface, and is held at that position by friction when the hand is released.

Therefore, irrespective of the angle and position of the surface on which the clamp plate 4 is mounted, for example, even when the clamp plate 4 is mounted on a vertical surface, the position and posture are maintained, which hinders the installation work of the mold. Never give. And
After placing the mold 3 on the underframe 2, the clamp plate 4 is moved to bring the end on the side where the fulcrum member 6 is not attached to the mold 3,
The fulcrum member 6 is moved in the longitudinal direction, and is loosely tightened while being adjusted to obtain a sufficient tightening force. In this state, after finely adjusting the position of the mold 3 more precisely, the clamp bolt 5 is firmly tightened and fixed immovably.

FIG. 6 shows another embodiment in which the clamp plate 4 is improved. The improved clamp plate 4 'has a plurality of arc-shaped concave portions 4b corresponding to the arcs on the upper surface of the pillow member 6b arranged on the lower surface. That is, the pillow member 6b receives the action in the pulling-up direction by the spring 6f similarly to the previous embodiment, and is engaged with one of the plurality of recesses 4b to temporarily stop the movement in the longitudinal direction. When the fulcrum member 6 is to be moved in the longitudinal direction from this state, the pillow member 6b is manually pulled down against the elasticity of the spring 6f by hand, and the upper surface thereof is separated from the recess 4b. Since the contact area between the pillow member 6b and the clamp plate 4 is increased, the change in the posture of the pillow member 6b during unclamping is reduced. Note that the other points are almost the same as those in the previous embodiment, and thus detailed description is omitted.

[0013]

As described above, according to the present invention, the fulcrum member 6 sandwiches the clamp plate 4 between the upper member 6a and the pillow member 6b.
Since the fulcrum member 6 is loosely restrained by the elasticity of the spring 6f, the fulcrum member 6 does not significantly change its position or posture unless the operator operates it, even if the clamp bolt 5 is loosened.
Facilitates clamping and unclamping of clamped objects. Further, although the fulcrum member 6 and the clamp plate 4 are frictionally engaged, their contact surfaces are in line contact with each other, so that the movement resistance is small and the movement may be slightly inclined during the movement. This also has a practically remarkable effect such that there is no hindrance to the movement.

[Brief description of the drawings]

FIG. 1 is a partially broken side view showing an embodiment of the present invention.

FIG. 2 is a plan view thereof.

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

FIG. 4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is an external view of a fulcrum member 6 as a main part.

FIG. 6 is a sectional view corresponding to FIG. 1 showing another embodiment.

[Explanation of symbols]

4 ---- Clamp plate, 4b --- Arc-shaped recess, 5 ----
-Clamp bolt, 6 ---- fulcrum member, 6a--upper member, 6b--pillow member, 6e--gap,

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁷ identification symbol FI B29C 45/26 B29C 45/26 F16B 2/18 F16B 2/18 F (58) Investigated field (Int.Cl. ⁷ , DB name) ) B29C 33/00-33/76 B21D 37/00-37/20 B21D 17/00-17/32 B23Q 3/00-3/18 B29C 45/00-45/84 F16B 2/00-2/26

Claims (2)

(57) [Claims] 1. A clamp plate 4 having a longitudinal slot 4a.
A fulcrum member 6 is supported at one end and the other end is abutted against the object 3. The clamp bolt 5, which is inserted through the center and screwed to the underframe 2, is rotated to move the object 3 to the underframe. 2, the fulcrum member 6 acts on at least the upper member 6a disposed on the upper surface of the clamp plate 4, the pillow member 6b disposed on the lower surface, and the direction in which the two members approach each other. A lower surface of the upper member 6a in contact with the clamp plate 4 and a clamp plate 4 of the pillow member 6b.
Has a fulcrum structure in which an upper surface in contact with is formed in an arc shape having an axis in a direction perpendicular to the longitudinal direction of the clamp plate 4.
A clamp fitting characterized in that: 2. A clamp having a fulcrum structure according to claim 1, wherein an arc-shaped concave portion 4b corresponding to the arc-shaped upper surface of the pillow member 6b is formed on the lower surface of said clamp plate 4.
Pump hardware.