JPH0131409Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a clamping device that is capable of adjusting the position of a workpiece holding end of a workpiece holding member that holds and holds a workpiece.

(Prior Art) As a conventional clamp device, there is one shown in FIG. 1, for example.

That is, the clamp device 1 includes a mounting support base 10 fixed to a workbench S, a clamp lever 11 pivotally supported on the base 10, and a work holding member 2 attached to one end of the lever 11. ,
Furthermore, the end 31a of the outer casing 31 of the control cable 3 is fixed to the mounting support base 10, and the tip 32a of the inner cable 32 extending from the end 31a is connected to the clamp lever 11. ,
The clamp lever 11 rotates around the pivot 10a of the mounting support base 10, and the workpiece holding end 21 of the workpiece holding member 2 clamps and releases the workpiece W. Further, the clamping device 1 is configured to clamp the nut 2 of the workpiece holding member 2.
2 and 22 and change the protrusion amount X of the workpiece holding end 21 from the clamp lever 11.
It is possible to adjust the position so that the pressing surface 21a of the workpiece holding end 21 and the pressed surface W1 of the workpiece W are brought into proper surface contact, and to adjust the clamping force.

However, in such a conventional clamping device 1, when using a workpiece W having a deep U-shaped cross section, for example, the clamp lever 11
When rotating the workpiece W from the release position shown by the two-dot chain line in FIG. 1 to the clamp position shown by the solid line in FIG. The work holding end 2 may interfere with the edge of the workpiece W, making it impossible to clamp the work W.
When the protrusion amount X of 1 is simply reduced,
The pressing surface 21a will no longer come into proper surface contact with the pressed surface W1.

Therefore, in the conventional clamp device 1, in order to prevent the workpiece holding end 21 from interfering with the workpiece W, and to bring the pressing surface 21a of the workpiece holding end 21 into correct surface contact with the pressed surface W1 of the workpiece W. In addition to adjusting the protrusion amount X, the mounting position of the mounting support base 10 must also be adjusted, which makes the adjustment work complicated and has the problem of poor workability.

(Purpose of the invention) The present invention has been made by focusing on such conventional problems, and an object of the present invention is to provide a clamping device that allows extremely easy position adjustment of the workpiece holding member and the workpiece.

(Structure of the invention) In order to achieve the above object, in the present invention, in a clamp device in which the position of the work holding end of the work holding member that holds and holds the work can be adjusted, one end of the first lever part is attached and supported. The second lever part is pivoted to the base, and one end of a second lever part having the same length as the first lever part is pivoted to the mounting support base at a different point from the first lever part, and further, a parallel link is formed. The clamping device is configured such that the other ends of both the lever parts are pivotally supported on the work holding member, and the work holding member is moved in parallel by rotation of both the lever parts.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

2 and 3 show an embodiment of the present invention, in which a clamping device 1 is installed on a workbench S and clamps a workpiece W having a U-shaped cross section. the first levers 42, 43 of
and a pair of second levers 45 and 46 forming a second lever part 44 having the same length as the first lever part 41 are respectively pivoted on the mounting support base 5 at different locations, and the second lever part 41 is pivoted to form a parallel link 40. 1 lever 42,4
3 and the other ends of the second levers 45 and 46 are pivotally supported by the work holding member 2.

The mounting support base 5 has L-shaped cross-section support brackets 51 and 52 facing each other.
1 and 52, the vertical parts form support walls 51a and 52a, and the mounting surface part 5 is attached to the lower end of each support wall 51a and 52a.
1b, 52b are formed, supporting walls 51a, 52a
A connecting plate 53 is provided between the rear ends.

The first levers 42 and 43 have base ends attached to the second mounting support base 5 via a pivot shaft 54 installed between the support walls 51a and 52a of the support brackets 51 and 52.
The second lever 4 is pivotably supported to be reversible between the clamp position shown by the solid line in the figure and the release position shown by the two-dot chain line.
5 and 46 have support brackets 51 and 52 at their proximal ends.
A pivot 55 installed between the supporting walls 51a and 52a of
It is pivotably supported on the mounting support base 5 via the clamping position shown by the solid line in FIG. 2 and the release position shown by the two-dot chain line in a reversible manner.

The work holding member 2 has pivot parts 2 formed at both ends.
The first pivot member 23 pivotally supports the first levers 42, 43 by means of 3a, 23a, and the second lever 45, 4 by pivot parts 24a, 24a formed at both ends.
6, and a spacer 25 interposed between the first and second pivot members 23 and 24 to hold the first and second levers 42, 43 and 45, 46 in parallel. , first pivot member 23,
It consists of a bolt 26 that is inserted through the spacer 25 and the second pivot member 24, and nuts 27 and 28 that are screwed into the bolt 26 and sandwich the first pivot member 23, the spacer 25, and the second pivot member 24.
The head of No. 6 forms a work holding end 29. A spring member 5 that biases the workpiece holding member 2 toward the release position.
0 is stretched between the first lever 42 and the pivot shaft 54.

The end portion 31a of the outer casing 31 of the flexible control cable 3 is fixed to the connecting plate 53 of the mounting support base 5, and the tip portion 32a of the inner cable 32 inserted into the outer casing 31 is connected to the connecting plate 53 of the mounting support base 5. 2 levers 45,4
Driven arms 45a, 46 extending from the base end of 6
It is fixed to a connecting member 47 that connects a.

The opposite end of the control cable 3 is connected to an input side operation section (not shown).

In addition, the pivots 54, 55 of the mounting support base 5 and the first and second levers 42, 43 and 45, 46
A parallel link 40 is formed by the first and second pivot members 23 and 24, and the spacer 25.

Furthermore, since the pivots 54 and 55 are provided on the same vertical line, the work holding member 2
It is held vertically by levers 42, 43 and second levers 45, 46.

In the clamping device 1 having the above configuration, when the inner cable 32 of the control cable 3 is pulled at the input side operating section in the release position shown by the two-dot chain line in FIG. The connecting member 47 is pulled, and the first levers 42, 4 are in the release position shown by the two-dot chain line.
3 and second levers 45 and 46 rotate counterclockwise about pivots 54 and 55 against the biasing force of spring member 50 to the clamp position shown by the solid line. Due to this rotation, the workpiece holding member 2 is displaced from the release position to the clamping position shown by the solid line, and the pressing surface 29a of the workpiece holding end 29 is pressed against the pressed surface W1 of the workpiece W.
The workpiece holding end 29 is in proper surface contact with the workpiece W.
Press down and hold.

To release the clamp, use the input side operation section to release the inner cable 3 of the control cable 3.
2 is extended, the first levers 42, 43 and the second levers 45, 46 rotate clockwise about the pivots 54 and 55, and are reversed to the release position shown by the two-dot chain line.

Therefore, the workpiece holding end 29 of the workpiece holding member 2 separates from the workpiece W, releasing the workpiece W.

In addition, the pivots 54, 5 provided on the same vertical line
5, first levers 42, 43, and second levers 45, 4
6, the first pivot member 23, and the second pivot member 24
and the spacer 25 form a parallel link 40, and the work holding member 2 is supported by the first levers 42, 43 and the second levers 45, 46. When the two levers 45 and 46 rotate, the work holding member 2 moves in parallel between the release position and the clamp position while maintaining the vertical posture.

Therefore, the second lever 4 of the work holding end 29
Even if the amount of protrusion Make face-to-face contact.

The trajectory drawn by the workpiece holding end 29 is similar to the trajectory of the first levers 42, 43 and the second levers 45, 46, and by arbitrarily changing the protrusion amount X of the workpiece holding end 29, the workpiece holding end 29 can be moved. The trajectory of the end 29 can be changed arbitrarily.

That is, by simply loosening the nuts 27 and 28 and adjusting the protrusion amount X of the workpiece holding end 29, the corner portion 29b of the workpiece holding end 29 can be adjusted so as not to interfere with the edge of the workpiece W.

In addition, in the above embodiment, the first lever part 41 and the second lever part 44 were each composed of two first levers 42, 43 and two second levers 45, 46, but the two first levers 42 and 43 may be integrally formed to constitute the first lever section, and the two second levers 45 and 46 may be integrally formed to constitute the second lever section.

Furthermore, one lever may constitute the first lever section, and one lever may constitute the second lever section.

(Effect of the invention) According to the clamping device according to the invention, since the ends of the first lever part and the second lever part forming the parallel link are pivotally supported by the workpiece holding member, rotation of the two lever parts is possible. Due to the movement, the workpiece holding member moves in parallel between the release position and the clamping position while maintaining a vertical posture, and at the clamping position, the workpiece holding end of the workpiece holding member always makes surface contact with the workpiece correctly.
In order to prevent interference between the workpiece holding end and the workpiece, adjustment can be made extremely easily by changing the position of the workpiece holding end, improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a conventional example of the present invention, and FIGS. 2 and 3 show an embodiment of the present invention.
FIG. 2 is a plan view, and FIG. 3 is an exploded perspective view. W... Work, 1... Clamp device, 2... Work holding member, 5... Mounting support base, 29...
Work holding end, 40...Parallel link, 41...First lever portion, 44...Second lever portion.

Claims (1)

[Scope of utility model registration request] In a clamping device in which the position of the workpiece holding end of a workpiece holding member that presses and holds a workpiece can be adjusted, one end of a first lever part is pivoted to a mounting support base, and a first lever part having the same length as the first lever part is pivoted to a mounting support base. 2
Attach one end of the lever portion to the first mounting support base.
A clamping device which is pivoted at a different location from the lever part, and further has the other ends of both lever parts pivoted to the work holding member to form a parallel link.