JPH0539834U - Clamp device - Google Patents

Abstract

(57) [Summary] [Purpose] The center of the work piece clamped by the claws should always be constant. [Structure] A pair of upper sliders with claws 3 provided to slide in the left-right direction along a guide rail 2 provided on the base 1, and a pair of upper sliders located below the upper sliders to slide in the front-rear direction. Ridge 14 and a groove formed in a planar C-shape so as to slidably mesh with and engage with the overlapping surfaces of the lower slider 12 assembled in the seat base and the upper sliders on both upper surfaces of the lower slider. 15 and a screw shaft 16 that slides the lower slider in the front-rear direction, and the claw is expanded and contracted by rotating the screw shaft.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a clamp device for gripping a workpiece to be machined, for example.

[0002]

[Prior Art]

 In the conventional clamp device, when a fixed-position rotary shaft with a handle is rotated, the movable body on one side, in which a female screw is screwed into the screw provided for this rotary shaft, slides toward and away from the movable The work is held between the body and the other fixed body that faces the body.

[0003]

[Problems to be solved by the device]

 According to the clamp device having the above-described configuration, the working center of the work gripped by the movable body and the fixed body does not match the center of a tool such as a drill for machining. For this reason, there is a problem that centering is required for each processing and the efficiency is remarkably reduced.

Therefore, an object of the present invention is to provide a clamping device in which the machining center of a clamped work is always constant.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention has a pair of upper sliders with pawls which are opposed to each other so as to slide in the left-right direction along a guide rail provided on a seat, and a position below the upper sliders. Then, the lower slider assembled in the seat so as to slide in the front-rear direction and the overlapping surfaces of both upper end portions of the lower slider and the lower surfaces of the upper sliders are slidably meshed with each other. As shown in the figure, the protrusions and grooves formed in a plane C shape are screwed into the screw holes of the lower slider by locating the operating part on the outside, and the bearings are rotatably mounted on the seat to rotate freely in place. It employs a clamp device consisting of a shaft.

[0006]

[Action]

 When the screw shaft is rotated in one direction and the lower slider is slid rearward, both upper sliders slide in the separating direction due to the planar c-shaped protrusions and grooves that are meshingly engaged, and both claws slide. To expand.

Next, when the screw shaft is rotated in the other direction after the workpiece is interposed between the widened claws, the lower slider is slid forward, so that both upper sliders slide in the approaching direction. The workpiece is clamped by the claw.

[0008]

【Example】

 An embodiment according to the present invention will be described below with reference to the accompanying drawings.

As shown in the drawing, a pair of upper sliders 4 and 5 with pawls 3 which are opposed to each other so as to slide along the guide rail 2 in the left-right direction are provided on the seat 1.

As shown in FIGS. 2 and 3, the guide rail 2 is provided with a groove 6 having an open upper surface between both ends of the upper surface of the seat 1, and the upper sliders 4 and 5 are fitted into the groove 6. At the same time, the projecting strips 9 projecting from the front and rear surfaces of the upper sliders 4 and 5 are held by the holding plates 8 which are fixed to the front and rear surfaces of the seat 1 via the screw bolts 7.

In addition, the claw 3 is placed on the upper sliders 4 and 5 in the case shown in the figure, and after engaging with the engaging portion 10 formed of a planar cross-shaped projection and a recess provided on the overlapping surface. , Is fixed via a bolt 11 to be screwed.

Further, in the seat 1, a lower slider 12 which is positioned below the upper sliders 4 and 5 and slides in the front-rear direction is provided.

As shown in FIG. 3, the lower slider 12 is provided with a concave step portion 13 that faces downward from the bottom surface of the groove 6, and is fitted into the concave step portion 13.

Further, the overlapping surfaces of the upper surfaces of both end portions of the lower slider 12 and the lower surfaces of the upper sliders 4 and 5 have a planar C-shaped protrusion 14 slidably meshed with each other and a protrusion 14. Grooves 15 are provided.

In the case shown in the figure, the protrusions 14 are formed on both ends of the upper surface of the lower slider 12 so that the facing distance becomes narrower toward the front, and the grooves 15 are provided on the upper sliders 4 and 5, but they may be provided in reverse. .

Reference numeral 16 denotes a screw shaft that positions the operation portion on the surface of the seat 1 and is screwed into the screw hole 17 of the lower slider 12 and that is supported by the seat 1 so as to freely rotate at a fixed position.

With the above configuration, when the screw shaft 16 is rotated in one direction, the lower slider 12 is slid rearward so that the projecting ridges 14 and the groove ridges 15 engaged with each other form both upper side sliders 4. Since 5 slides in the separating direction, both claws 3 are expanded.

Next, after interposing the work piece between the widened claws 3, when the screw shaft 16 is rotated in the other direction, the lower slider 12 is slid forward to engage the protruding ridges 14 with each other. Since both upper sliders 4 and 5 slide in the approaching direction with the groove 15, the work piece is clamped by the contracting claw 3.

In the illustrated screw shaft 16, an integral flange 28 provided on the outer periphery of the outer end of the screw shaft 16 is fitted into the bottom of the recess 18 of the seat 1 and the recess 18. Hold the bolt 19 to hold it with the holding piece 20 and rotate it at a fixed position. Also, from the bottom surface of the lower slider 12 upward, a hole 22 that intersects the axis of the through hole 21 of the screw shaft 16 at a right angle. The nut plate 23 for the screw hole 17 is fitted into the hole 22 so as not to rotate, and the handle is fitted into the square hole 24 provided on the outer end face of the screw shaft 16 to engage and rotate. It is like this.

Further, as shown in the figure, if the screw shaft 16 is inclined so that the square hole 24 is located at the high place, the turning operation by the handle becomes easy.

Reference numeral 25 in the drawing denotes a guide rail plate of the lower slider 12. Reference numeral 26 denotes a bolt insertion hole for fixing the seat 1 to the table 27.

[0022]

【effect】

 As described above, according to the clamp device of the present invention, when the lower slider is slid in the front-rear direction by the turning operation of the screw shaft, the slidable flat ridge-shaped protrusion and groove can be slid freely. With such a meshing engagement, the upper slider can be slid in the left and right directions and slid in the separating direction to expand and contract the claws. Therefore, it is possible to eliminate the problem that the center of the clamped work is out of alignment.

[Brief description of drawings]

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

FIG. 2 is a plan view of the same as above.

[Fig. 3] Side view of the same section

FIG. 4 is a cross-sectional bottom view of a fitting engagement portion between a protrusion and a groove.

[Explanation of symbols]

 1 pedestal 2 guide rail 3 claw 4 upper slider 5 lower slider 6 groove 7 bolt 8 holding plate 9 projecting strip 10 engaging part 11 bolt 12 lower slider 13 concave step 14 projecting strip 16 screw shaft 17 screw hole

Claims (1)

[Scope of utility model registration request] 1. A pair of upper sliders with claws facing each other so as to slide in the left-right direction along a guide rail provided on a seat, and a pair of upper sliders located below the upper sliders and sliding in the front-rear direction. Thus, the lower slider incorporated in the seat is provided with a planar C-shape so as to be slidably meshed with and engaged with the overlapping surfaces of the upper slider both ends of the lower slider and the lower surfaces of the upper sliders. A clamping device comprising a ridge and a groove, and a screw shaft which is positioned outside and screwed into a screw hole of the lower slider, and which is rotatably supported by the pedestal so as to freely rotate at a fixed position.