Work holders – Relatively movable jaws – Clamp couple element with fastening means
Reexamination Certificate
2002-10-10
2004-04-06
Watson, Robert C. (Department: 3723)
Work holders
Relatively movable jaws
Clamp couple element with fastening means
C269S093000
Reexamination Certificate
active
06715747
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a jig for positioning and fixing a workpiece, and more particularly to a jig which can position a workpiece with respect to a workbench of a machine tool such as a pressing machine or a cutting machine and clamp the workpiece.
As a jig for positioning and fixing a workpiece, the applicant of this application proposes one disclosed in Japanese Laid-Open Patent Publication No. Hei 10-231091. As shown in
FIG. 9
, this jig includes a base member
32
mounted on the upper face of a table
31
, and an adjustment member
33
screwed into a screw hole
32
a
of the base member
32
. Further, this jig includes a bolt
34
and a first nut
35
. The bolt
34
is inserted into the screw hole
32
a
of the base member
32
and a through hole
33
b
formed in the center of the adjustment member
33
. The bolt
34
is engaged and fixed to the table
31
. The first nut
35
fixes the base member
32
and the adjustment member
33
to the table
31
in cooperation with the bolt
34
.
When fixing a workpiece W, a clamp fitting
36
is mounted on a flange portion
33
c
integrally formed at the upper end portion of the adjustment member
33
and the workpiece W mounted on the upper face of the table
31
. Then, a second nut
37
screwed into the bolt
34
is fastened and the clamp fitting
36
is pressed downward, thereby fixing the workpiece W to the table
31
.
In the conventional jig, however, a space formed between the upper end face
32
b
of the base member
32
and the lower end face
33
e
of the flange portion
33
c
is not effectively utilized. Therefore, the clamp fitting
36
must be arranged as a separate member on the upper face of the flange portion
33
c
of the adjustment member
33
, and the number of components of the jig is thereby increased, which results in the problem that manufacturing and assembling cannot readily be performed.
It is an objective of the present invention to eliminate the problem existing in the prior art and to provide a jig for positioning and fixing a workpiece, which can facilitate manufacture with the reduced number of components and easily perform the clamping operation.
BRIEF SUMMARY OF THE INVENTION
To solve the above-described problem, according to the present invention, there is provided a jig for positioning and fixing a workpiece on a workbench. The jig has a first clamping member having a screw hole extending in the vertical direction. A second clamping member has an insertion hole extending in the vertical direction, also has a male screw portion screwed into the screw hole of the first clamping member so as to be capable of adjusting a position thereof. The second clamping member also includes a flange portion at the upper outer periphery. A fixing member pierces the screw hole of the first clamping member and the insertion hole of the second clamping member, and fixes the first and second clamping members to the workbench. A fastening member determines the position of a workpiece with respect to the workbench by utilizing the first and second clamping members fixed to the workbench by the fixing member, and fixes the workpiece which has moved to a space between the clamping face of the first clamping member and the flange portion of the second clamping member.
REFERENCES:
patent: 62-65136 (1987-04-01), None
patent: 1-92337 (1989-06-01), None
patent: 01-199744 (1989-08-01), None
patent: 4-2541 (1992-01-01), None
patent: 04-189438 (1992-07-01), None
patent: 10-231091 (1998-09-01), None
patent: 11-207641 (1999-08-01), None
Carstens David W
Carstens Yee & Cahoon LLP
Watson Robert C.
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