JPH07625U - Clamp device - Google Patents

Abstract

(57) [Abstract] [Purpose] A workpiece can be supplied to a jig from a good working direction, and operability is improved with a simple configuration. [Structure] A substantially L having a frame 10 which can be detachably fixed on a jig 35 and an elastic member 15 which is pressed against a work W.
Via a spindle 12 having a V-shaped clamp head 13 mounted at its tip, a rotary coupling body 20 that rotatably inserts the spindle 12 into the frame 10, and an idle link 27 having one end coupled to the rotary coupling body 20. Handle 2
5 is connected to the rear end of the spindle 12, and a plate 31 is provided which is biased by the compression spring 33 fitted to the rotary coupling body 20 and pressed against the frame surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a clamp device that can fix and temporarily attach a work with good operability when processing or assembling the work on a jig.

[0002]

[Prior art]

 Conventionally, there are various types of clamp devices for fixing a work to a jig depending on the size, shape, processing conditions of the work, etc. It is common to have a structure in which a drive operation is performed via a link mechanism. For example, as a structure in which the clamp head is linearly moved to fix the work, there is one described in Japanese Utility Model Laid-Open No. 2-100149.

In this clamp device, a drive mechanism that slides in a vertical direction by a drive lever using a slide post standing on a base plate as a guide, and a work corresponding to a clamp head at a position opposite to the mounting position of the drive lever. A pressing mechanism is provided, and the work pressing mechanism is pushed down by the drive lever so that the work can be pressed from above.

By the way, when supplying a work to a fixed position, it is necessary to retract the clamp head. In general, the mutual relationship between the retracting direction of the clamp head and the supply direction of the work has a great influence on the work efficiency. Therefore, in this type of clamp device, a technique has been proposed in which the retracting direction of the clamp head is horizontal so that the work can be supplied from above the clamp head (Japanese Utility Model Publication No. 56-104832).

[0005]

[Problems to be solved by the device]

 However, in the first prior art mentioned above, it is pointed out that the workability is poor because the clamp head interferes when the work is supplied from above the clamp head to the jig. On the other hand, in the conventional technology in which the work can be supplied from above the clamp head, it is possible to avoid interference with the clamp head, but since the clamp head is retracted, a large-scale structure is formed centering on the drive mechanism, and expensive equipment There is a problem with the storage.

[0006] Therefore, an object of the present invention is to solve the problems of the above-mentioned 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 a clamp device designed.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is a clamp device having a clamping head for holding a work against a jig and a toggle mechanism for fixing and releasing the work, which can be detachably fixed on the jig. A frame, a spindle having a substantially L-shaped clamp head having an elastic member that comes into pressure contact with the work, and a rotary connection body that rotatably inserts the spindle into the frame, And a toggle mechanism in which a handle is connected to the rear end of the spindle through an idle link, one end of which is connected to the connecting body, and is pressed against the frame surface by being biased by a compression spring fitted to the rotary connecting body. It is characterized in that it is provided with a plate.

[0008]

[Action]

 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. Further, since the handle is connected to the rotary connector via the idle ring, and also connected to the spindle, by rotating the handle around the spindle axis, the clamp head is moved from the fixed position of the workpiece. Can be evacuated. When the clamp head is rotated, the spindle and the rotary connecting body rotate integrally, and a frictional force acts between the plate pressed against the frame by the compression spring and the frame in a direction to prevent the rotation. It is possible to prevent careless rotation of the clamp head.

[0009]

【Example】

 Hereinafter, an embodiment of a clamp device according to the present invention will be described with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates a frame for fixing the clamp device to the jig. The frame 10 is a substantially angle-shaped member reinforced by welding after press molding, has a bolt hole for fixing to a jig, and has a hole 11 at the center. A spindle 12 is rotatably attached to the frame 10 in the hole 11 via a rotary coupling body described later.

A clamp head 13 is attached to the tip of the spindle 12. The clamp head 13 is composed of a head body 14 and a pressing member 15 made of hard rubber as an elastic member that comes into pressure contact with a work. The head body 14 is a part in which a cylindrical portion 14a that is coaxially and detachably fitted to the spindle 12 and a mounting portion 14b whose cross-sectional shape is a substantially right triangle are integrally formed into a side shape of an L-shape. It is fixed to the tip of the spindle 12 by means of a hexagon socket set screw 16 screwed into the portion 14a. On the other hand, a threaded pin member 17 is implanted in the mounting portion 14b, and the holding member 15 is attached by being screwed into the pin member 17.

On the other hand, the rotary coupling body 20 that couples the spindle 12 to the frame 10 is composed of a sleeve-shaped member into which the spindle 12 is rotatably inserted. In the embodiment, the flange portion 21 of the rotary coupling 20 is configured as a stopper that restricts the rotation of the spindle 12 at about 180 degrees. That is, as shown in FIG. 2, which is a sectional view taken along the line AA of FIG. 1, the flange portion 21 has a shape in which a portion 21a having a small radius and a portion 21b having a large radius are integrally formed, and the change in the radius. A stopper pin 22 is planted in the frame 10 at a position just in contact with the portion to be engaged.

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

The L-shaped handle 25 for operation constitutes a part of a toggle mechanism, and the clamp head 13 can firmly hold the work. In this embodiment, one end of an idle link 27 is rotatably connected to the box-shaped member 24 through a pin 26, and the other end thereof is connected to an L-shaped handle 25 through a pin 28 that is the center of rotation thereof. It is connected. The tip of the L-shaped handle 25 bent 90 degrees with respect to the handle is connected to the end of the spindle 12 via a pin 29. Therefore, when the tip ends of the idle link 27 and the L-shaped handle 25 forming the toggle mechanism are aligned, the clamp head 13 is pulled with the maximum force. At the position where the maximum force is applied, the idle link 27 comes into contact with the stopper 30, which restricts the handle angle of the handle 25.

On the other hand, on the side of the clamp head 13 of the frame 10, a compression spring 33 is mounted between the plate 31 and the spring lock nut 32 in the rotary coupling body 20, and the elastic force of the compression spring 33 always causes the plate 31 to move. It is pressed against the surface of the frame 10. A screw is formed on the outer circumference of the rotary coupling body 20, and the spring lock nut 32 is fixed so as to be screwed into the screw, and is fastened with a lock nut 34 via a washer 34-1. ing.

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

First, the clamp device is positioned by fixing its frame to the jig 35 using a bolt or the like (not shown). Then, when the work W is placed on the jig 35 at a position to be fixed and then the handle 25 is pushed down around the pin 28 in the clockwise direction in FIG. The work W can be pressed against the jig 35 by the pressing member 15 of 3. As shown in FIG. 1, when the handle 25 is rotated to a right angle of about 90 degrees with respect to the spindle 12, a large force acts on the work W by the toggle mechanism constituted by 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 is not damaged and the work W can be fixed with an even pressing force. .

On the other hand, when releasing the work W, when the handle 25 is pushed counterclockwise contrary to the above, the spindle 12 moves forward and the holding member 15 of the clamp head 13 separates from the work W. Then, in FIG. 3, by rotating the spindle 12 in the direction of the arrow with the handle 25, the holding member 15 of the clamp head 13 rotates 180 degrees in the circumferential direction to the position shown by the chain double-dashed line, whereby the clamp head 13 is moved. The work W is evacuated.

Here, FIG. 4 is a front view of the clamp device in relation to the workpiece W to be fixed. A solid line shows a state where the clamp head 13 is fixing the work W, and a two-dot chain line shows an opened state where the clamp head is retracted. It can be seen that the clamp head 13 does not interfere with the work W at this open position. Therefore, the work W can be easily supplied from above the clamp head 13 to the fixing position on the jig 35, and the work W can be fixed with good workability.

When the clamp head 13 is rotated in order to fix the workpiece with the clamp head 13, the rotary coupling body 20 integrated with the handle 25 is also rotated via the idle link 27. Therefore, a frictional force corresponding to the elastic force is generated between the plate 31 and the frame 10 which are pressed by the elastic force of the compression spring 33, and this frictional force acts as a force for preventing the rotation of the spindle 12. . Therefore, it is possible to prevent an erroneous operation in which the clamp head 13 is rotated by the operation of the handle 25 which is not easy and the work W is dented or scratched. As shown in FIG. 2, the clamp head 13 is regulated by the stopper pin 22 so as to rotate only within a range of 180 degrees, so double safety measures are taken to prevent the work W from being damaged. Has been taken.

Here, FIG. 5 shows a state in which the work W is fixed by using a plurality of clamp devices. Thus, even in the work of simultaneously fixing a large number of works W on the jig, the works W can be easily set from above the clamp head 13, and after that, the handle 25 is rotated around the axis of the spindle 12 to clamp the work. It is possible to fix the head 13 firmly by simply adjusting the pressing member 15 of the head 13 to the work W and then turning the handle 25 clockwise in the drawing.

Next, FIG. 6 shows another embodiment of the clamp device according to the present invention. In FIG. 6, the same components as those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. In this clamp device, as the handle 36, a handle having handles 37a and 37b extending in directions orthogonal to each other is used. Since the handles 37a and 37b are orthogonal to each other in this manner, when the clamp head 13 is rotated, the handle 37a which is orthogonal to the spindle 12 is operated at the open position, and when the workpiece is clamped, the handle 37a is parallel to the spindle 12. Since the handle which is easy for the operator to operate can be selected according to the posture in which the work is fixed, such as pressing the handle clockwise with the handle 37b, the operability is further improved. .

[0022]

[Effect of device]

 As is clear from the above description, according to the present invention, a substantially L-shaped clamp head having a frame that can be removably fixed on a jig and an elastic member that comes into pressure contact with the work is attached to the tip. A spindle, a rotary coupling body that rotatably inserts the spindle to the frame, and a handle connected to the rear end of the spindle via an idle link having one end coupled to the rotary coupling body. Since a toggle mechanism is provided, the clamp head can be rotated around the spindle axis to prevent interference with the work, and the work can be easily and efficiently fed from above the clamp head to fix the work. You can Further, since the plate that is biased by the compression spring fitted to the rotary coupling body and pressed against the frame surface is provided, when the clamp head is rotated, the plate slips on the frame surface to suppress the rotation. Therefore, it is possible to prevent the work from being scratched by rotating the clamp head carelessly.

[Brief description of 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 in which a clamp head is opened.

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

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

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

[Explanation of symbols]

 10 frame 12 spindle 13 clamp head 15 holding member 20 rotary connecting body 23 connecting member 24 box-shaped member 25 handle 27 idle link 31 plate 33 compression spring 35 jig 36 handle W work

Claims (1)

[Scope of utility model registration request] 1. A clamp device having a clamp head for holding a work with respect to a jig and a toggle mechanism for fixing and opening the work, a frame detachably fixable on the jig, and pressure contact with the work. A spindle having a substantially L-shaped clamp head having an elastic member attached to the tip thereof, a rotary coupling body that rotatably inserts the spindle with respect to the frame, and an idle having one end coupled to the rotary coupling body. A toggle mechanism in which a handle is connected to a rear end of the spindle via a link, and a plate is provided which is biased by a compression spring fitted to the rotary connection body and pressed against the frame surface. Clamping device characterized by