JP2558285Y2 - Jig for clamping work - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamping jig for fixing a work to be machined by a machine tool on a table.

[0002]

2. Description of the Related Art As shown in FIG. 5, a conventional general clamping jig for fixing a work to be machined by a machine tool on a table can slide a tightening bolt 3 in a T-groove 2 provided in a table 1. The clamp plate 4 is inserted into the tightening bolt 3 through the elongated hole 5, and a plurality of divided backup blocks 7 are interposed between the rear end of the clamp plate 4 and the table 1. Then, by tightening the nut 6 screwed to the tightening bolt 3, the tip of the clamp plate 4 is pressed from the upper surface of the work W placed on the table 1 and clamped.

[0003]

In the clamping jig having the above-mentioned conventional structure, the tip of the clamp plate 4 is flat, and can press only the flat portion of the work W, so that the top shape of the work W is flat. limited.

In addition, it is necessary to increase or decrease the number of backup blocks 7 divided into a plurality between the rear end of the clamp plate 4 and the table 1 in accordance with a change in the height of the work W. However, it is troublesome and quick work cannot be obtained. Furthermore, a plurality of backup blocks 7 having various heights must be provided in advance, and the transportation of these blocks is troublesome.

It is an object of the present invention to provide a work clamping jig which solves the above-mentioned conventional problems.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to make it possible to slide and disengage a T-groove of a table on which a work is placed, and to provide an engaging recess formed on the circumference. A circular column with grooves formed in a plurality of stages at a constant pitch in the axial direction,
A support block having a locking claw that is fitted to the support so as to be slidable in the axial direction and rotatable and detentable in the circumferential direction, and that has a locking claw that engages and disengages with the engagement groove of each step; A work support stay that is supported so as to be able to move forward and backward and tighten and fix in the horizontal direction perpendicular to the table, and a work support stay that comes into contact with an elevation surface of a work placed on the table, and a support block above the support block via a link. A clamp plate that is swingably connected in the front-rear direction and has an angle-changeable work holding member that abuts on the upper surface of the work at a front end thereof; and a screw that is vertically movably screwed to the support block. And a clamping bolt abutting on the lower surface of the rear end.

[0007]

With the above construction, the position of the support block is changed up and down with respect to the support in accordance with the height of the work, and the work support stay is brought into contact with the upright surface of the work. The member contacts the upper surface of the work. At this time, even if the upper surface of the work has an angle, the work holding member follows the angle and changes the angle to abut. Thereafter, the clamp bolt is moved upward by the operation lever, whereby the tip of the clamp plate is moved downward about the connection portion by the link as a fulcrum, and the work is pressed and clamped.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a table on which a work W is placed, and a T groove 2 is provided on the upper surface of the table 1.
Reference numeral 10 denotes a circular column that is slidably and detachably fitted in the T-groove 2 and that is positioned perpendicular to the surface of the table 1. The support pillar 10 is formed with a plurality of engagement grooves 11 recessed in the circumference thereof at a constant pitch in the axial direction. Further, a concave groove 12 is provided on the outer peripheral surface in the axial direction.

A support block 15 is fitted to the column 10 so as to be slidable in the axial direction and pivotable and non-rotatable in the circumferential direction. I have. As shown in FIG. 3, the structure has a hole 20 to be inserted into the column 10, and around the hole 20, the engagement groove 11 of each step provided in the column 10 is rotated by 45 degrees. An unlocking claw 21 is provided. Further, as shown in FIG. 1, a concave groove 1 provided on the outer peripheral surface of the column 10 is provided.
2. The detent stopper 18 that engages with the support block 15
Is mounted on the lower surface of the rear end so as to be able to move forward and backward. 1
Reference numeral 9 denotes a tightening screw for the stopper 18. In FIG. 3, reference numeral 40 denotes a screw hole of a clamping bolt 26 described later.

The table 1 is provided on the support block 15.
A work supporting stay 13 which is in contact with an upright surface of the work W placed thereon is supported so as to be able to advance and retreat in a horizontal direction orthogonal to the support 10 and to be fastened and fixed. As shown in FIGS. 1 and 3, the structure is such that pins 16 project from front and rear positions on both sides of a support block 15, and a work support stay 13 is provided with a guide elongated hole 14 in its longitudinal direction. The elongated hole 14 is fitted to the pin 16 so as to be slidable in the horizontal direction. Further, screw shafts project from both side surfaces of the support block 15 in a diagrammatic manner, penetrate the guide elongated holes 14, and are screwed with wing screws 17. By tightening the wing screws 17, the work supporting stay 13 is moved. It is configured to be fixed to the support block 15.

A clamp plate 22 is supported above the support block 15 via a link 26 so as to be swingable in the front-rear direction. As shown in FIG. 2, the clamp plate 22 has a hole 22a penetrating the column 10, a bracket 22b having a screw hole, a bracket 22c for connecting the link 26 near the hole 22a, and a rear end lower surface. A long groove 22d is provided in the front-rear direction.

FIG. 1 shows a bracket 22b having a screw hole.
As shown in FIG. 4, a work holding member 23 that is in contact with the upper surface of the work W is attached by a fixing bolt 25 so that the angle can be changed. A buffer material 24 is adhered to the contact surface of the work holding member 23 with the work W to prevent the work W from being damaged.

A clamp bolt 27 is screwed into a screw hole 40 provided at the rear end of the support block 15 so as to be vertically movable. This clamping bolt 2
7 has a hemispherical head 27a.
7a comes into contact with a concave groove 22d formed on the lower surface of the rear end of the clamp plate.

The clamp bolt 27 is provided with a wrench 28 for rotation, and an operation lever 29 for rotating the wrench 28 is connected by a hinge 30 so as to be bent at a right angle.

Since the present invention has the above-described structure, the workpiece W is clamped as shown in FIG. It is in contact with the upper surface. The pressing clamp force by the work holding member 23 is equivalent to the clamping bolt 2
7 is moved upward by the spanner 28 and the operation lever 29, the tip of the clamp plate 22 moves downward with the link 26 as a fulcrum, and the work holding member 23 is pressed against the upper surface of the work W. When the work W is unclamped, the pressing force of the work holding member 23 is released by moving the clamp bolt 27 downward.

When the height of the work W is changed,
In order to change the positions of the clamp plate 22 and the work support stay 13 according to the height of the stopper, first, the tightening screw 19 of the stopper 18 is loosened and the stopper 1 is rotated.
8 is disengaged from the concave groove 12 of the column 10 by moving backward. As a result, the support block 15 becomes rotatable with respect to the column 10.

Therefore, by rotating the support block 15 by 45 degrees, the locking claws 21 which have been engaged with the engagement grooves 11 of the column 10 are disengaged, and the support block 15 is slidable in the vertical direction. State. Therefore, the clamp plate 2
The support block 15 is adjusted up and down so that the position 2 is appropriate for the height of the workpiece W.
Reverse the degree.

As a result, the locking claw 21 engages with the engaging groove 11 of the column 10 corresponding to the locking claw, and the support block 1
5 is positioned. Thereafter, the detent stopper 18 is moved forward to engage with the concave groove 12 of the column 10, and the support block 15 is tightened with the tightening screw 19 so that the column 10 is
Is locked in both the vertical direction and the rotation direction.

When there is an inclined angle or a curved surface on the upper surface of the work W with which the work holding member 23 contacts, the fixing bolt 25 is loosened to contact the work holding member 23 with the inclined angle or the curved surface of the upper surface of the work W. Then, the posture of the work holding member 23 is made to follow the inclination angle or the curved surface of the upper surface of the work W, and the fixing bolt 25 is tightened and fixed.

Further, since the work supporting stay 13 moves integrally with the support block 15, there is no need to adjust the position in the vertical direction. By loosening, the work support stay 13 can be moved back and forth in the horizontal direction by the pin 16 and the guide elongated hole 14. When the work support stay 13 comes into contact with the upright surface of the work W, the thumb screw 17 is tightened and fixed.

Thereafter, the work W is clamped by moving the clamping bolt 27 upward with the spanner 28 by the operation lever 29 as described above. In the illustrated embodiment, the spanner 28 and the operation lever 29 have a dedicated wrench structure provided in the vicinity of the clamping bolt 27, but the wrench 28 and the operation lever 29 are not necessarily provided together. Instead, the clamp bolt 27 may be rotated with a general tool wrench.

[0022]

As described above, according to the present invention, the adjustment of the proper position of the clamp plate with respect to the height of the workpiece to be clamped is achieved by sliding the support block in the axial direction with respect to the support column and the engaging groove and the locking claw. And the structure is designed to prevent rotation by a rotation stopper, eliminating the need to use a backup block as in the past, providing a large number of backup blocks of various dimensions,
The work of stacking is omitted, and the work of positioning the clamp plate can be obtained quickly and easily.

The clamping force on the workpiece by the clamping plate is swung by the clamping bolt at the rear end of the clamping plate around the link connecting portion of the clamping plate. Large clamping force can be obtained with force.

Further, since the angle of the work holding member provided at the tip of the clamp plate can be changed with respect to the clamp plate, even if the upper surface of the work is an inclined surface or a curved surface, an appropriate angle corresponding to the angle can be obtained. It is possible to clamp while maintaining a proper posture, and the selection range of the workpiece shape to be clamped is widened.

Further, since the work is supported by the work supporting stays on the vertical surface of the work, the work can be prevented from falling down or being displaced during clamping, and the work can be clamped at a fixed position in a correct posture. Have.

[Brief description of the drawings]

FIG. 1 is a sectional view of a clamping jig according to the present invention.

FIG. 2 is a plan view of a clamp plate.

FIG. 3 is a plan view of the support block and the work support stay

FIG. 4 is a view as seen from an arrow A in FIG. 1;

FIG. 5 is a perspective view of a conventional general work clamp jig.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Table 2 T-slot 10 Prop 11 Engagement groove 12 Depression groove 13 Work support stay 14 Guide long hole 15 Support block 16 Pin 17 Thumb screw 18 Detent stopper 21 Locking claw 22 Clamp plate 23 Work holding member 25 Fixing bolt 26 Link 27 Clamp bolt

Claims (1)

(57) [Scope of request for utility model registration] 1. A circular column which is slidable and disengageable in a T-groove of a table on which a work is placed, and has a plurality of engaging grooves formed in the circumference at a constant pitch in the axial direction. A support block having locking pawls which are slidably fitted in the column in the axial direction, and which can be turned and detented in the circumferential direction, and which are engaged with and disengaged from the engaging grooves of the respective steps; A work support stay which is supported so as to be able to move forward and backward and tighten and fix in a horizontal direction perpendicular to the support, and which comes into contact with an upright surface of a work placed on the table; and A clamp plate attached to a front end thereof and having a front end provided with a work holding member capable of changing the angle which comes into contact with the upper surface of the work, and a screw which is vertically movably screwed to the support block; After A jig for clamping a workpiece, comprising: a clamping bolt abutting on an end lower surface.