JP3055884B2 - Pull clamp device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pull clamp device for connecting two members using a pull rod.

[0002]

2. Description of the Related Art In a conventional pulling clamp apparatus shown in FIG. 9 (Japanese Utility Model Laid-Open No. 3-38496), a receiving member 73 is provided on a lever holder 71, and the receiving member 73 is pulled by a pulling rod 72.
When pressing the right end as viewed in FIG. 9 and rotating the lever 70 in the direction of arrow B to remove the other member 75 from the one member 74 and move it in the direction of arrow A, the left end of the pull rod 72 Is designed so that it does not get in the way.

However, in this type of pull clamp apparatus, after releasing the clamp, the vertically oriented pull rod 72 is manually lifted to the angle shown in FIG. 9 and the receiving member 73 is attached to the right end of the pull rod 72. There is a problem that the catching member has to be hooked, which is troublesome, and that the receiving member 73 cannot withstand the clockwise torque of the pulling rod 72 and cannot come off the lever holder 71.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a durable pull clamp device in which the pull rod does not interfere with the replacement of the other member 75.

[0005]

SUMMARY OF THE INVENTION The present invention provides a clamp lever rotatably supported at a base end via a shaft on a clamp lever holder fixed to one of two members; A pull rod rotatably supported via a pin parallel to the shaft at an intermediate portion of the lever,
By rotating the clamp lever in a state where the spherical head of the pull rod is engaged with the engaging portion formed of an arcuate surface provided on the other member, the pull rod is pulled toward one member and the two In a pull clamp device for joining members,
A hook is provided on the clamp lever holder,
The clamp lever is provided with a hook receiver to which the hook can be attached and detached, and a pull rod support mechanism is provided between the shaft of the clamp lever and a pin. When the pull rod becomes a predetermined angle or less, the pull rod is supported by the pull rod support mechanism, and when the hook provided on the clamp lever holder is engaged with the hook receiver provided on the clamp lever, the pull rod becomes the other member. A pull clamp device which is fixed at a position where it does not interfere with the other member at the time of attachment / detachment.

[0006]

FIG. 4 is a front view of a spray apparatus 200 for a die casting machine disclosed in Japanese Patent Application No. 9-192276 filed by the present applicant in which only the pull clamp apparatus is replaced with the pull clamp apparatus 100 of the present invention. Is shown.

The pull clamp device 100 is installed on both the left and right sides of the base manifold 80 as viewed in FIG. 4, and FIG. 1 shows only the left pull clamp device 100 on an enlarged scale.

[0008] The cassette spray heads 81a and 81b are attached to the base manifold 80 by the pulling clamp device 10.
It is integrated by 0 (toggle clamp). The spherical head 2a at the lower end of the pull rod 2 is provided with a hemispherical concave portion 16 which opens downward from a protector 16 integrated with the connector mounting manifold 9.
a (FIG. 1), the clamp lever 1 is supported via a shaft 4 on a lever holder 3 integrally fixed to a base manifold 80, and as shown by a broken line in FIG. It is supported by a clamp lever 1 via a pin 5. In FIG. 4, reference numeral 82 denotes a blow nozzle holder, and reference numeral 83 denotes a blow nozzle.

The cassette spray head 81a shown in FIG.
2 on the left side of the base manifold 80 in the depth direction of the paper.
The cassette spray head 81 of FIG.
b, two cassette spray heads 81 are mounted on the right side of the base manifold 80 in the depth direction of the paper surface.
In both a and 81b, only one on the near side of the paper is visible.

Although not shown, the protector 16 has a vertical groove through which the pull rod 2 passes. The atomizer 84 is attached to the board 85 with bolts (not shown), and a helicert (screw reinforcing material) is inserted into the board 85 for screw reinforcement.

The above-described spray apparatus 2 for a die casting machine.
00 is dropped from above by a driving mechanism (not shown) between the movable mold 90 and the fixed mold 91, and the release agent is sprayed from the nozzle 86 toward the inner surfaces of both molds.

When the position where the release agent is sprayed is changed by replacing the mold with another mold, another nozzle having a nozzle 86 arranged at a position suitable for the release agent spraying position of the other mold. It is necessary to mount the cassette spray heads 81a and 81b on the base manifold 80. Cassette spray head 8
1a, 81b can be attached and detached by using a pull clamp device 10 described later.
This is performed by turning ON / OFF the 0 clamp. Hereinafter, the structure and operation of the pull clamp device 100 will be described.

As described above, FIG. 1 is an enlarged view of only the left side of the two pulling clamp devices 100 of FIG. The pulling clamp device 100 includes a lever holder 3 integrally fixed to a base manifold 80, a hook 8 that rotates about a shaft 6 provided on the lever holder 3, and a clamp lever supported by a shaft 4 provided on the lever holder 3. 1, a pull rod 2 supported by a pin 5 provided on the clamp lever 1 and a pull rod support mechanism 15 provided on the clamp lever 1 and described later in detail.

As shown in FIG. 1, the hook 8 has a substantially L-shape, and a vertically extending side is housed in the lever holder 3 by a torsion spring 7, and a tip of the other horizontally extending side is shown in FIG. A projection 10 extending downward as seen in FIG. As shown in FIG. 1, the protrusion 10 is rounded by removing the corner of the lower left part.

The lower end of the clamp lever 1 is supported by a shaft 4 as seen in FIG. The clamp lever 1 is provided with a hook receiving hole 9.
By hooking 0, the clamp lever 1 can be fixed so as not to rotate.

A pin 5 is provided in the middle of the clamp lever 1. The pin 5 penetrates and supports the upper end of the pull rod 2. The pull rod 2 is rotatable about a pin 5. At the lower end of the pull rod 2, a spherical head 2a is provided as shown in FIG.

To adjust the distance between the pin 5 and the spherical head 2a, a female screw (not shown) is provided on the square pole portion 11 (FIG. 2) above the pull rod 2, and the pull rod 2
A male screw (not shown) is provided in the cylindrical portion 12 below the rectangular portion, and the square pillar portion 11 and the cylindrical portion 12 are screwed together, and a lock nut 14 is provided in the male screw of the cylindrical portion 12. The lock nut 14 fixes the distance between the pin 5 and the spherical head 2a at a predetermined distance, and the square column 11 and the column 1
2 are integrally fixed.

As shown in FIG. 1, a pull rod support mechanism 15 is provided between the pin 5 and the shaft 4 of the clamp lever 1. As shown in FIG. 5, which is a cross-sectional view taken along the line VV of FIG. 1, the cap 19 is fixed to the clamp lever 1 with a bolt 20 so as to be concentric with the opposing hole 13 provided in the clamp lever 1. ing.

A coil spring 18 is contracted on the cap 19, and a sphere 17 slightly larger in diameter than the hole 13 is pressed by the coil spring 18 to expose a part of the sphere 17 from the hole 13 so that the sphere 17 At the portion exposed from the hole 13 of the
Is pressed.

The upper part of the clamp lever 1 has a substantially U-shape which is open rightward as viewed in FIG. 1, and the lower part is also open on both sides at a right angle to the paper so as not to interfere with the pull rod 2. . The clamp lever 1 is provided with a hook receiving hole 9 through which a hook 8 (FIG. 1) passes.

At the time of clamping in the state shown in FIG. 1, the spherical head 2a of the pull rod 2 is fitted into the hemispherical recess 16a.
The protector 16 and the lever holder 3 are formed with a vertical groove 23 through which the rotating pull rod 2 passes.
The dashed line in FIG. 1 connecting the pin 5 and the center of the spherical head 2a is
It is located to the right of the shaft 4 during clamping.

Next, the operation of the pull clamp device 100 will be described. When detaching the cassette spray heads 81a, 81b (FIG. 4) from the base manifold 80 (FIG. 4), the projections 10 of the hooks 8 shown in FIG. 1 are replaced by arrows D (FIG. 2) as shown by two-dot chain lines in FIG. The finger is pushed up against the torsion spring 7 in the direction, the projection 10 is removed from the hook receiving hole 9, and the clamp lever 1 is rotated in the direction shown by the arrow E in FIG.

The spherical head 2a of the pull rod 2 comes off the hemispherical concave portion 16a by its own weight, and the pull rod 2 rotates about the pin 5 and always maintains a vertical posture. When the clamp lever 1 and the pull rod 2 reach a predetermined angle, the sphere 17 comes off the pull rod 2 as shown in FIG. The hook 8 returns to the original position shown by the solid line in FIG.

The state shown in FIG.
When the rotation in the direction of the arrow E in FIG. 2 is stopped, the two spheres 17 are respectively pressed by the coil springs 18 and a part thereof is exposed from the hole 13, and the square pillar portion 11 of the pull rod 2 in FIG. The lower ends on the left and right as viewed are supported by the sphere 17. The angle between the clamp lever 1 and the pull rod 2 at this time is defined as G.

When the clamp lever 1 is rotated in the direction shown by the arrow F in FIG. 3 in this state, the pull rod 2 is rotated in the direction shown by the arrow F while maintaining the angle G with the clamp lever 1, and As shown in FIG.
Is engaged with the projection 10 of the hook 8.

At this time, the projection 10 abuts on the lower edge of the hook receiving hole 9 due to the roundness provided at the lower left in FIG. After passing through the hook receiving hole 9, the torsion spring 7
Returns to the home position shown in FIG. In the state shown in FIG. 3, even if the cassette spray head 81a is moved in the direction shown by the arrow H, the pull rod 2 is avoided upward, so that it does not become an obstacle.

When a new cassette spray head 81a is mounted on the base manifold 80, the pull clamp apparatus 100 moves the cassette spray head 81a below the base manifold 80 with the pull rod 2 initially in the state shown in FIG. After that, the protrusion 10 of the hook 8 is slightly lifted up by hand to remove it from the hook receiving hole 9, and the clamp lever 1 is rotated in the direction opposite to the arrow F to reach the state shown in FIG.

Here, the spherical head 2a of the pull rod 2 is fitted into the hemispherical recess 16a of the protector 16. At this time, the pull rod 2 is manually pushed counterclockwise with respect to the clamp lever 1 to push the pull rod 2 against the coil spring 18 of the pull rod support mechanism 15 provided on the clamp lever 1 to push back the sphere 17. The state of FIG. 5 is changed from the state of FIG.

Next, a line connecting the pin 5 and the spherical head 2a (FIG. 1)
Is indicated by a dashed line. Is turned to the right of the shaft 4 and the clamp lever 1 is fixed by the hook 8 to complete the clamping.

FIGS. 7 and 8 show modifications of the pull rod support mechanism 15 corresponding to FIGS. 5 and 6, respectively. As shown in FIG. 7 and FIG.
8 is installed concentrically with the coil spring 18, and a screw hole is provided in the center of the cap 19, a screw 22 is screwed into the screw hole, the degree of contraction of the coil spring 18 is adjusted, and the sphere 17 in FIG. The force for supporting the rod 2 may be adjusted.

[0031]

According to the pull clamp device 100 of the present invention,
After the clamp is released, the pull rod 2 is supported by the pull rod support mechanism 15 as shown in FIGS. 6 and 8, and is rotated with the clamp lever 1 to the position shown in FIG. 3 to fix the position with one touch. Even if there are a plurality of pulling clamp devices 100, they can be quickly fixed so as not to hinder the movement of the cassette spray heads 81a and 81b, and the positions thereof can be fixed. The work efficiency can be dramatically improved because it can be replaced.

Further, even if the ON / OFF operation of the clamp is frequently repeated, any member is not damaged as in the pulling clamp device of Japanese Utility Model Laid-Open No. 3-38496.
A durable pull clamp device 100 is obtained.

[Brief description of the drawings]

FIG. 1 is a front view of a pull clamp device of the present invention.

FIG. 2 is a front view of the pulling clamp device of the present invention when the clamp is released.

FIG. 3 is a front view of the pull clamp device of the present invention showing a state in which the pull rod is avoided upward.

FIG. 4 is a front view of a spray device for a die casting machine to which the pull clamp device of the present invention is applied.

FIG. 5 is a sectional view taken along line VV of FIG. 1;

FIG. 6 is a cross-sectional view showing a state where the pull rod support mechanism supports the pull rod.

FIG. 7 is a sectional view corresponding to FIG. 5 of a modification of the pull rod support mechanism.

FIG. 8 is a cross-sectional view showing a state in which a pull rod supporting mechanism of a modified example supports a pull rod.

FIG. 9 is a front view of a conventional pull clamp device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clamp lever 2 Pull rod 2a Spherical head 3 Lever holder 4 Shaft 5 Pin 8 Hook 9 Hook receiving hole 15 Pull rod support mechanism 16a Semi-spherical recess 80 Base manifold 81a, 81b Cassette spray head

Claims (1)

(57) [Claims] 1. A clamp lever rotatably supported at a base end portion by a clamp lever holder fixed to one of two members via a shaft, and a shaft provided at an intermediate portion of the clamp lever. A pull rod rotatably supported via a parallel pin, and a clamp lever in a state where the spherical head of the pull rod is engaged with an engaging portion formed of an arcuate surface provided on the other member. In the pulling clamp device that connects the two members by pulling the pulling rod toward one member by rotating, the hook is provided on the clamp lever holder,
The clamp lever is provided with a hook receiver to which the hook can be attached and detached, and a pull rod support mechanism is provided between a shaft of the clamp lever and a pin. When the pull rod becomes a predetermined angle or less, the pull rod is supported by the pull rod support mechanism, and when the hook provided on the clamp lever holder is engaged with the hook receiver provided on the clamp lever, the pull rod becomes the other member. A pull clamp device, which is fixed at a position where it does not interfere with the other member at the time of attachment / detachment.