JP2594485Y2 - Clamping 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 clamp device which can fix and temporarily attach a work with good operability when working or assembling the work on a jig.

[0002]

2. Description of the Related Art Conventionally, there are various types of clamp devices for fixing a work to a jig according to the size, shape, and processing conditions of the work. In general, the clamp head is driven through a link mechanism. For example, Japanese Patent Laid-Open Publication No. 2-100749 discloses a structure in which a clamp head moves linearly to fix a work.

In this clamp device, a drive mechanism that slides vertically by a drive lever with a slide post standing on a base plate as a guide, and a work pressing mechanism corresponding to a clamp head at a position opposite to a mounting position of the drive lever. The work lever is depressed by a drive lever to press the work from above.

By the way, when supplying a work to a fixed position, it is necessary to retract the clamp head. In general, the reciprocal relationship between the retreat direction of the clamp head and the supply direction of the work greatly affects the efficiency of the work. Therefore, in this type of clamp device, there has been proposed a technique in which the retreat direction of the clamp head is set to be horizontal so that a workpiece can be supplied from above the clamp head (Japanese Utility Model Application Laid-Open No. 56-104832).

[0005]

However, in the first prior art, when the work is supplied to the jig from above the clamp head, it is pointed out that the work efficiency is poor due to the interference of the clamp head. . On the other hand, in the prior art in which the work can be supplied from above the clamp head, it is possible to avoid interference with the clamp head. Problem.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, to enable a workpiece to be supplied to a jig from a good working direction, and to improve operability with a simple configuration. It is to provide an intended clamping device.

[0007]

In order to achieve the above object, the present invention provides a clamp apparatus having a clamp head for holding a work to a jig and a toggle mechanism for fixing and releasing the work. A frame removably fixable on a tool, a spindle having a substantially L-shaped clamp head having an elastic member pressed against the workpiece, and a spindle mounted on a tip thereof; And a toggle mechanism that connects a handle to the rear end of the spindle via an idle link having one end connected to the rotary connector. A plate is provided which is urged by a fitted compression spring and pressed against the frame surface.

[0008]

According to the present invention, the work can be fixed and the work can be opened by rotating the handle. When the work is fixed, the work is firmly held between the elastic member of the clamp head and the jig by the action of the toggle mechanism. In addition, since the handle is connected to the rotary connector via the idle ring and also to the spindle, the clamp head can be retracted from the fixed position of the work by rotating the handle around the spindle axis. it can. When rotating this clamp head, the spindle and the rotary connection body rotate integrally,
Since a frictional force acts between the plate pressed against the frame by the compression spring and the frame in a direction that prevents the rotation, careless rotation of the clamp head can be prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the clamp device according to the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 10 denotes a frame for fixing the clamp device to the jig. The frame 10 is a substantially angled member reinforced by welding after press forming, has a bolt hole for fixing to a jig, and has a hole 11 at the center. This hole 11
, A spindle 12 is mounted on the frame 10 so as to be rotatable and movable in the axial direction via a rotary connector described below.

A clamp head 13 is attached to the tip of the spindle 12. The clamp head 13 includes a head main body 14 and a pressing member 15 made of hard rubber as an elastic member that is pressed against the work. The head main body 14 is a component formed by integrally forming a cylindrical portion 14a coaxially and detachably with the spindle 12 and a mounting portion 14b having a substantially right-angled triangular cross-section into a substantially L-shaped side surface. It is fixed to the tip of the spindle 12 by a hexagon socket set screw 16 screwed into the portion 14a. On the other hand, a pin member 17 whose outer periphery is threaded is implanted in the mounting portion 14b, and the pressing member 15
Is attached by screwing to the pin member 17.

On the other hand, the rotary connector 20 for connecting the spindle 12 to the frame 10 is composed of a sleeve-like member on which the spindle 12 is rotatably inserted. In the embodiment, the flange portion 21 of the rotary coupling body 20 is configured as a stopper that restricts the rotation of the spindle 12 by approximately 180 degrees. That is, as shown in FIG. 2, which is a cross-sectional view taken along the line AA in FIG. 1, the flange portion 21 has a shape in which a small-radius portion 21a and a large-radius portion 21b are integrated, and the radius changes. A stopper pin 22 is implanted in the frame 10 at a position where the stopper pin 22 just comes into contact with the portion to be moved.

A box-shaped member 24 is integrally fixed to such a rotary connecting body 20 via a connecting member 23, and the rear end side of the spindle 12 passes through the connecting member 23 and the box-shaped member 24. .

The operating L-shaped handle 25 constitutes a part of a toggle mechanism, so that the work can be firmly held by the clamp head 13. In this embodiment, one end of an idle link 27 is rotatably connected to the box-shaped member 24 via a pin 26, and the other end is connected to a L-shaped handle 25 via a pin 28 serving as the center of rotation. ing. Further, a tip bent 90 degrees with respect to the handle of the L-shaped handle 25 is connected to the end of the spindle 12 via a pin 29. Accordingly, when the idle link 27 and the tip of the L-shaped handle 25 constituting the toggle mechanism are aligned, the clamp head 13 is pulled with the maximum force. In the position where the maximum force is applied, the idle link 27 abuts on the stopper 30, whereby the handle angle of the handle 25 is restricted.

On the other hand, the clamp head 13 of the frame 10
On the side, a compression spring 33 is mounted between the plate 31 and the spring lock nut 32 in the rotary connection body 20, and the elastic force of the compression spring 33 constantly presses the plate 31 against the surface of the frame 10. In addition, a screw is formed on the outer periphery of the rotary connection body 20, and the spring fixing nut 32 is fixed so as to be screwed with the screw and fastened with the lock nut 34 via the washer 34-1. ing.

The present invention is configured as described above. Next, its operation will be described. FIG. 1 shows a state where the work W is fixed by the clamp head 13, and FIG. 3 shows a state where the clamp head 13 is opened.
In the drawing, reference numeral 35 denotes a jig, and a case where the work W is fixed to the jig 35 using the clamp device according to the embodiment will be described below.

First, the clamp device is positioned by fixing its frame to a jig 35 using bolts or the like (not shown). Then, after placing the work W at a position to be fixed on the jig 35 and pressing down the handle 25 clockwise about the pin 28 in FIG. 3, the spindle 12 retreats.
The work W can be pressed against the jig 35 by the third pressing member 15. As shown in FIG. 1, when the handle 25 is rotated until the handle 12 becomes substantially 90 degrees perpendicular to the spindle 12, a large force acts on the work W by the toggle mechanism including the idle link 27, the handle 25 and the spindle 12. Therefore, the work W is firmly fixed. At this time, since the work W is held by the holding member 15 using an elastic member such as hard rubber, the work W
The workpiece W can be fixed with a uniform pressing force without damaging the workpiece W.

On the other hand, when the work W is released, the handle 12 is pushed up in the counterclockwise direction, and the spindle 12 moves forward and the pressing member 1 of the clamp head 13 is released.
5 moves away from the work W. Then, in FIG. 3, by rotating the spindle 12 in the direction of the arrow with the handle 25, the pressing member 15 of the clamp head 13 is rotated 180 degrees in the circumferential direction to the position shown by the two-dot chain line. Retreat from the work W.

Here, FIG. 4 shows the clamp device from the front in relation to the workpiece W to be fixed. A solid line indicates a state in which the clamp head 13 fixes the work W, and a two-dot chain line indicates an open state in which the clamp head is retracted. In this open position, the clamp head 13
Does not interfere with the work W. Therefore, jig 3
Workpiece W is clamped to a fixed position on
Can be easily supplied from above, so that the work W can be fixed with good workability.

When the clamp head 13 is rotated in order to fix the work with the clamp head 13, the rotary connector 20 integral with the handle 25 via the idle link 27 also rotates. For this reason, the compression spring 33
A frictional force corresponding to the elastic force is generated between the plate 31 and the frame 10 pressed by the elastic force, and the frictional force acts as a force for preventing the spindle 12 from rotating. For this reason, an erroneous operation that causes the clamp head 13 to rotate and cause a dent or a scratch on the workpiece W due to an uneasy operation of the handle 25 can be prevented. As shown in FIG. 2, since the clamp head 13 is restricted by the stopper pin 22 so as to rotate only in a range of 180 degrees, a double safety measure is taken so as not to damage the work W. Have been.

FIG. 5 shows a state in which the work W is fixed by using a plurality of clamping devices. In this way, even in the operation of fixing a large number of works W on the jig at the same time, the works W can be easily set from above the clamp head 13, and then the handle 25 is moved to the spindle 1
2 about the axis 2 and the pressing member 1 of the clamp head 13
By simply turning the handle 25 clockwise in the figure after aligning the workpiece 5 with the workpiece W, it can be firmly fixed.

FIG. 6 shows another embodiment of the clamping device according to the present invention. In FIG. 6, the same components as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. In this clamping device, the handle 36
Handles 37a, 37b extending in directions orthogonal to each other
Is used. Thus, the handle 37a,
Since the clamp 37b is orthogonal, when rotating the clamp head 13, the handle is operated with the handle 37a orthogonal to the spindle 12 in the open position, and when clamping the work, the handle is held with the handle 37b parallel to the spindle 12. Since the operator can easily select the handle, such as pushing down clockwise, depending on the posture for fixing the work, the operability is further improved.

[0022]

[Effects of the Invention] As is clear from the above description, according to the present invention, a frame detachably fixed on a jig,
A spindle having a substantially L-shaped clamp head having an elastic member pressed against the work, the spindle being mounted on the tip, and a rotary connector for rotatably and axially moving the spindle with respect to the frame. A toggle mechanism is provided by connecting a handle to the rear end of the spindle via an idle link having one end connected to the rotary connection body. Interference is prevented, and the supply of the work from above the clamp head can easily and efficiently fix the work with good operability. Further, since the plate is provided which is urged by the compression spring fitted to the rotary connector and pressed against the frame surface, the plate slips on the frame surface when the clamp head is rotated, thereby suppressing the rotation. In addition, it is possible to prevent the work from being inadvertently rotated and damaging the work.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a clamp device according to the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a side view showing a state where a clamp head is opened.

FIG. 4 is a front view showing a state where a work is fixed on a jig using a clamp device.

FIG. 5 is a schematic side view showing a state in which a plurality of clamp devices are fixed to a work on a jig.

FIG. 6 is a side view of a clamp device according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Frame 12 Spindle 13 Clamp head 15 Holding member 20 Rotational connection body 23 Coupling member 24 Box-shaped member 25 Handle 27 Idle link 31 Plate 33 Compression spring 35 Jig 36 Handle W Work

Claims (1)

(57) [Scope of request for utility model registration] 1. A clamp device having a clamp head for holding a work to a jig, a toggle mechanism for fixing and releasing the work, a frame detachably fixed on the jig, and a press contact with the work. a spindle clamping head of substantially L-shaped is attached to the tip with a resilient member for rotatably and the spindle relative to the frame
A rotary connecting member inserted so as to be movable in an axial direction, and a toggle mechanism having a handle connected to a rear end of the spindle via an idle link having one end connected to the rotary connecting member. A clamp device comprising a plate which is urged by a compression spring fitted on a body and pressed against the frame surface.