Clamp device

Abstract

To provide a new clamp device which can easily and strongly fix a workpiece and can easily remove the workpiece after machining.SOLUTION: In a clamp device 1, workpieces A, B supported by workpiece support sections 22a, 22b on a substrate 10 are pressed from above and fixed by a pressing section 34 of a workpiece pressing member 16 which horizontally rotates from an initial position separated from the workpiece support sections 22a, 22b, reaches the workpiece support sections 22a, 22b, and lowers at an arrival position, and pressing sections 34a, 34b of the workpiece pressing member 16 rise, releases the workpieces A, B, and rotates and returns up to the initial position. The clamp device includes: a screw shaft 12; a rotation lifting member 14; the workpiece pressing member 16; a temporary fixing release member 18; and a workpiece pressing member rotation prevention member 20.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a clamping device for fixing a workpiece. [Background technology]

[0002] 2. Description of the Related Art Clamping devices have been known for fixing and positioning a workpiece to be used in processing such as welding.

[0003] One such clamping device that has been proposed is a toggle clamp that has a handle rotatably attached to a vertical member erected on the mounting surface and an arm that rotates or moves linearly in the direction of the workpiece as the handle rotates and is locked by a toggle mechanism, with the tip of the arm having a contact portion that can rotate up and down and be fixed in position to come into contact with and press down on the workpiece (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2022-045845 Summary of the Invention [Problem to be solved by the invention]

[0005] Although various techniques for fixing a workpiece have been proposed, there has been a demand for a clamping device that can fix a workpiece more easily and firmly and also easily remove the workpiece.

[0006] An object of the present invention is to provide a novel clamping device that can easily and firmly fix a workpiece and can easily remove the workpiece after it has been machined. [Means for solving the problem]

[0007] The inventors conducted extensive research into a clamping device that can easily and firmly secure a workpiece and easily remove the workpiece after machining, and as a result discovered a new clamping device, which led to the completion of the present invention.

[0008] That is, the present invention is as follows. [1] A clamping device in which a pressing portion of a work pressing member horizontally rotates from an initial position away from the work support portion to reach the work support portion, and at the reached position, lowers to press and fix the work from above, and the pressing portion of the work pressing member rises to release the fixed work, and then rotates back to the initial position, A screw shaft erected on the substrate; A rotating and lifting member that is screwed onto the screw shaft and rotates and moves up and down along the screw shaft; a work pressing member which is inserted through the screw shaft and is temporarily fixed by being clamped from above and below so as to be movable synchronously with the rotary lifting member, the work pressing member having a pressing part on one side thereof for pressing the work supported by the work support part, and a reaction force receiving part on the other side via the screw shaft for receiving a reaction force caused by the pressing part pressing the work; a temporary fixation release member that limits the horizontal rotation of the work pressing member at the reached position and releases the temporary fixation between the work pressing member and the rotary lifting member; a work pressing member rotation preventing member that is provided on the base plate and that is engaged and disengaged with the work pressing member when the work pressing member is lowered and raised; Equipped with The pressing portion of the workpiece pressing member is When the workpiece is fixed, the workpiece is horizontally rotated from an initial position to the arrival position in accordance with the rotation of the rotary lift member, and the temporary fixation with the rotary lift member is released by the temporary fixation release member. In a state where the workpiece is held at the arrival position, the workpiece is lowered to a position where the workpiece is pressed in accordance with the descent of the rotary lift member. When the work is released, in a state in which the work is held at the reaching position, the work pressing member rises with the rise of the rotary lift member until it is disengaged from the rotation preventing member, and then rotates back to the initial position with the rotation of the rotary lift member. A clamping device characterized by:

[0009] [2] The clamp device according to [1] above, wherein the work pressing member rotation preventing member is capable of adjusting its height. [3] The clamping device according to [1] or [2] above, characterized in that the height of the work pressing member rotation preventing member is adjusted to be equal to or higher than the maximum height of the work supported by the work support portion of the base plate. [4] The clamping device according to any one of the above [1] to [3], characterized in that the work pressing member and the rotating and lifting member are temporarily fixed by magnets.

[0010] [5] The clamping device according to any one of [1] to [4] above, characterized in that the pressing portion of the work pressing member and the work supporting portion of the base plate are provided with a combination of a pin and a bush. [6] The clamping device according to any one of [1] to [5] above, wherein the horizontal rotation angle of the work pressing member is 90°. [7] The clamp device according to any one of the above [1] to [6], characterized in that the temporary fixation release member is provided adjacent to a work pressing member rotation preventing member erected on the base plate. Effect of the Invention

[0011] The clamping device of the present invention can easily and firmly fix a workpiece, and can also easily remove the workpiece after it has been machined. [Brief description of the drawings]

[0012] [Figure 1] 1 is a schematic perspective view of a clamping device according to a first embodiment of the present invention, showing a state in which a workpiece pressing member has been horizontally rotated from an initial position and is in a position above a workpiece supporting portion (reached position). FIG. [Diagram 2] 2 is a schematic cross-sectional side view of the clamp device shown in FIG. 1. [Diagram 3] FIG. 2 is a schematic cross-sectional side view of the clamping device according to the first embodiment of the present invention, showing a state in which the workpiece pressing member has been lowered to fix the workpiece at a reached position. [Figure 4] 1 is a plan view of a clamping device according to a first embodiment of the present invention, showing a state in an initial position. [Diagram 5] 1 is a plan view of a clamping device according to a first embodiment of the present invention, showing a state between an initial position and an reached position. FIG. [Figure 6] FIG. 2 is a plan view of the clamping device according to the first embodiment of the present invention, showing the state in the reached position. [Figure 7] FIG. 11 is a perspective view of a clamping device according to a second embodiment of the present invention in an initial position. [Figure 8] 8 is a side view of the clamp device shown in FIG. 7 as seen obliquely from the front. [Figure 9] FIG. 8 is a plan view of the clamp device shown in FIG. [Figure 10] FIG. 11 is a perspective view of a clamping device according to a second embodiment of the present invention in a reached position, showing a state in which a workpiece pressing member has been horizontally rotated from an initial position and is in a position (reached position) above a lower jig. [Figure 11] 11 is a side view of the clamp device shown in FIG. 10 as viewed from the front. [Figure 12] 11 is a side view of the clamp device shown in FIG. 10 as viewed from the side. [Figure 13] FIG. 11 is a plan view of the clamp device shown in FIG. [Figure 14] FIG. 11 is a perspective view of a clamping device according to a second embodiment of the present invention in a reached position, showing a state in which the workpiece pressing member has been lowered to fix the workpiece at the reached position. [Figure 15] 15 is a front view of the clamp device shown in FIG. 14 as viewed from the front. [Figure 16] 15 is a side view of the clamp device shown in FIG. 14. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The clamping device of the present invention is a clamping device in which a pressing portion of a work pressing member rotates horizontally from an initial position away from the work support portion to reach the work support portion, and at the reached position, descends to press and fix the work from above, and the pressing portion of the work pressing member rises to release the fixed work and rotate back to the initial position. The clamping device comprises a screw shaft provided upright on the substrate, a rotating and lifting member that is screwed onto the screw shaft and rotates and lifts and lowers along the screw shaft, and a member that is inserted into the screw shaft and is temporarily fixed by being clamped from above and below so as to be movable synchronously with the rotating and lifting member, the member having a pressing portion on one side that presses the work supported by the work support portion and a reaction force receiving portion on the other side via the screw shaft that receives a reaction force due to the pressing portion pressing the work; The device is equipped with a temporary fixation release member that limits the horizontal rotation of the pressing member at a reach position and releases the temporary fixation between the work pressing member and the rotating lifting member, and a work pressing member rotation preventing member that is erected on a base plate and engages and disengages with the work pressing member when the work pressing member is lowered and raised. When a work is fixed, the pressing part of the work pressing member rotates horizontally from an initial position to the reach position in conjunction with the rotation of the rotating lifting member, and, while being released from the temporary fixation with the rotating lifting member by the temporary fixation release member and held at the reach position, descends as the rotating lifting member descends to a position where it presses the work, and when the work is released, while being held at the reach position, rises as the rotating lifting member rises until it disengages from the work pressing member rotation preventing member, and then rotates back to the initial position in conjunction with the rotation of the rotating lifting member.

[0014] In the clamping device of the present invention, when a workpiece is fixed, the pressing part of the workpiece pressing member rotates horizontally from the initial position to the arrival position, and while held at the arrival position, presses the workpiece from above to fix it, and when the workpiece is released, the pressing part of the workpiece pressing member rises while held at the arrival position, releases the workpiece, and then rotates back to the initial position, so that the workpiece can be fixed easily and firmly, and the workpiece can be easily removed after processing. In addition, when the workpiece is pressed by the pressing part of the workpiece pressing member, the reaction force caused by the pressing of the workpiece is received by the reaction force receiving part provided on the opposite side via the screw shaft, and the pressing force against the workpiece is not released, so that the workpiece can be fixed firmly. Furthermore, when the workpiece is attached to or detached from the work support part, the pressing part of the workpiece pressing member is in a position (initial position) away from the work support part, so that the workpiece can be easily attached and detached without interfering with the clamping device.

[0015] Furthermore, the clamping device of the present invention can be installed anywhere, such as on a table, on the floor, etc. Also, since the work clamping device of the present invention has a simple configuration, it is easy to manufacture and can be mass-produced.

[0016] The clamping device of the present invention can be suitably used for fixing a workpiece to which a large force is applied during processing, or for fixing a workpiece that requires precision. Specifically, the clamping device of the present invention can be used for general processing operations that require fixing a workpiece, such as welding, electric discharge processing, laser processing, and assembly processing, and for installation of inspection equipment, etc.

[0017] (Work) The workpiece applicable to the clamping device of the present invention is not particularly limited as long as it has a shape that can be supported by the workpiece support part of the substrate and can be fixed by pressing from above, and examples of the shape include a plate-like object having a predetermined thickness and a polygonal or circular shape in a plan view. In addition, the workpiece usually has a positioning opening for setting it on the workpiece support part. The material of the workpiece is not particularly limited, and examples of the material include metal materials such as steel, copper, and aluminum, and plastic materials.

[0018] The configuration of the clamping device of the present invention will now be described in detail. [substrate] The substrate is a base member on which a work support portion for supporting a work is provided, and on which a screw shaft and a work pressing member rotation preventing member are provided. The substrate does not need to be fixed to a floor or the like, and may be placed or attached anywhere, for example, on a table. The substrate may be provided with a fixing means for fixing the substrate to an installation surface, as well as a leveling means such as a level or adjuster.

[0019] (Work support part) The work support portion is provided on the base plate, supports the work from below, and receives the pressure from the pressing portion of the work pressing member from above. The shape of the work support portion is not particularly limited as long as it can reliably support the work.

[0020] The work support part may be fixed to the substrate, or may be a replaceable member for use with various workpieces. The work support part may also be a part for fixing a plurality of overlapping workpieces. Furthermore, a plurality of work support parts may be provided on the substrate.

[0021] The work support portion preferably includes a pin or bushing that is inserted into a positioning opening formed in the work. That is, the positioning opening of the work is aligned with and inserted into the pin or bushing to support the work. In this case, a bushing or pin that corresponds to the pin or bushing of the work support portion is provided in the pressing portion of the work pressing member.

[0022] [Screw shaft] The screw shaft is a shaft member that is erected on the substrate and has a screw thread formed on its circumferential portion. The screw shaft has a predetermined height so that the work pressing member can perform predetermined movements such as ascending / descending and rotating. In addition, the screw shaft is preferably provided in the center of the substrate so that the reaction force receiving portion of the pressing portion of the work pressing member can press the substrate.

[0023] [Rotating lifting member] The rotating and lifting member is a member that is screwed onto the screw shaft and rotates and moves up and down along the screw shaft. The rotating and lifting member clamps the work pressing member from above and below and temporarily fixes it (removably fixed by applying a predetermined force), and is configured to be able to move synchronously with the work pressing member when in a temporarily fixed state. There are no particular limitations on the method for temporarily fixing the work pressing member and the rotating and lifting member, and examples of the method include a method using the magnetic force of a magnet or a method using the biasing force of a spring, with the method using the magnetic force of a magnet being preferred. The temporary fixing means such as a magnet may be provided on the work pressing member, the rotating and lifting member, or both.

[0024] Specifically, for example, the rotating lifting member is a cylindrical or prismatic member having an opening at its center to be screwed onto the screw shaft, and a clamping recess provided in the circumferential direction on its outer peripheral side wall to clamp the work pressing member. For example, by providing magnets on the protruding portions on both sides or one side of the clamping recess of the rotating lifting member, it becomes possible to temporarily fix the rotating lifting member to the work pressing member.

[0025] The rotation and elevation of the rotating and lifting member may be performed manually or mechanically. In the case of manual operation, the rotating and lifting member may be provided with an operating handle. In the case of mechanical operation, the crank device of the present invention may be provided with a motor that rotates the rotating and lifting member or the screw shaft.

[0026] [Work pressing member] The work pressing member is a member that is inserted into the screw shaft and is temporarily fixed by being clamped from above and below the rotating and lifting member so as to be movable synchronously with the rotating and lifting member. In other words, while the work pressing member is temporarily fixed to the rotating and lifting member, it moves in conjunction with the operation of the rotating and lifting member (it rotates and moves up and down in conjunction with the rotation and lifting of the rotating and lifting member). The work pressing member is provided on one side with a pressing part that presses the work, and on the other side via the screw shaft with a reaction force receiving part that receives a reaction force caused by the pressing part pressing the work. The work pressing member is also provided with a portion that engages with a work pressing member rotation preventing member when the work pressing member is lowered and raised.

[0027] The work pressing member rotates horizontally from the initial position to the final position, and the rotation angle is preferably 30° to 270°, more preferably 45° to 210°, and particularly preferably 90° or 180°.

[0028] (Pressing part) The pressing part is a member that presses and fixes the work supported by the work support part from above at a reached position after horizontal rotation from an initial position. The shape of the pressing part is not particularly limited as long as it can press the work, and examples of the shape include a cylindrical shape and a polygonal prism shape. When a pin or bush is provided on the work support part, a bush or pin corresponding to the pin or bush of the work support part is provided on the pressing part. The pressing part may be fixed to the work pressing member, or may be configured to be replaceable to suit various workpieces.

[0029] The pressing part may also be provided with a work fixing means such as a magnet, etc. This makes it possible to set the work not only on the work support part of the board, but also on the pressing part side that is in an initial position away from the work support part, allowing for efficient setting of the work.

[0030] Preferred specific aspects of the pressing portion of the work pressing member and the work support portion of the substrate include, for example, an aspect in which the work support portion of the substrate comprises a pin that is inserted into an opening formed in the work, and the pressing portion of the work pressing member comprises a bush that is inserted into the pin, or an aspect in which the pressing portion of the work pressing member comprises a pin that is inserted into an opening formed in the work, and the work support portion of the substrate comprises a bush that is inserted into the pin.

[0031] (Reaction force receiving part) The reaction force receiving portion is provided on the opposite side of the pressing portion with respect to the screw shaft, and is a member that receives the reaction force of the pressing portion by pressing a substrate, ground, etc. That is, when the pressing portion on one side presses the work from above, the pressing portion receives an upward reaction force from the work, and the reaction force receiving portion on the other side via the screw shaft uses the reaction force from the substrate or ground to suppress the upward reaction force of the pressing portion. This allows the pressing portion to press the work with a stronger force. Specifically, the reaction force receiving portion is, for example, a member provided on the lower part of the work pressing member, and is capable of pressing the substrate body, a member provided on the substrate, the ground, etc.

[0032] (Part that engages with the work pressing member rotation preventing member) The work pressing member has a portion (member) that engages with the work pressing member rotation preventing member. That is, at the reached position, the work pressing member has a portion that is in an engaged state and a disengaged state with the work pressing member rotation preventing member when the work pressing member descends and ascends. Examples of such a portion include an opening provided in the work pressing member, and a member having a recess or protrusion provided in the work pressing member.

[0033] [Temporary fixation release material] The temporary fixation release member is a member that restricts the horizontal rotation of the work pressing member at the reached position and releases the temporary fixation between the work pressing member and the rotary lifting member. By releasing the temporary fixation between the work pressing member and the rotary lifting member, the horizontal rotation of the work pressing member is stopped at the reached position, and the work pressing member only moves up and down along with the rotary lifting member. The temporary fixation release member may be any member that can restrict the horizontal rotation of the work pressing member at the reached position, and for example, an abutting member that prevents the progress of the work pressing member can be mentioned. The location of the temporary fixation release member may be anywhere as long as it can prevent the progress of the work pressing member, but a position adjacent to the work pressing member rotation prevention member is preferable. A specific embodiment of the temporary fixation release member may be, for example, a member that abuts against the work pressing member main body or pressing portion to limit the horizontal rotation of the work pressing member.

[0034] [Workpiece pressing member rotation prevention member] The work pressing member rotation preventing member is a member that is erected on a base plate and engages and disengages with the work pressing member when the work pressing member descends and ascends. As described above, it engages with an opening provided in the work pressing member or a member having a concave or convex portion in the work pressing member. For example, if the work pressing member rotation preventing member is a pin member with a convex tip that is erected on the base plate, it is inserted into and removed from an opening provided in the work pressing member or a concave portion of the work pressing member when the work pressing member descends and ascends. Also, if the tip of the pin member has a concave portion, it is inserted into and removed from the convex portion of the work pressing member. When the work pressing member releases the work, while the work pressing member rotation preventing member is engaged with the work pressing member, even if the rotating and lifting member rotates and rises, the work pressing member rises as it is without rotating toward the initial position, and when the engagement is released and the disengagement state is reached, it rotates together with the rotating and lifting member, and the work pressing member returns to the initial position.

[0035] The work pressing member rotation preventing member is preferably configured so that its height can be adjusted, and the height of this work pressing member rotation preventing member is preferably adjusted to be equal to or higher than the maximum height of the work supported by the work support part of the base plate. This prevents the work pressing member from rotating until it is above the work when the work pressing member releases the work, and prevents the work pressing member from interfering with the work.

[0036] An embodiment of the clamp device of the present invention will be specifically described below with reference to the drawings, but the present invention is not limited to this embodiment.

[0037] First, the configuration of a clamping device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. Here, Fig. 1 is a schematic perspective view of a clamping device according to a first embodiment of the present invention, showing a state in which a work pressing member has rotated horizontally from an initial position to a position above a work support part (reached position). Fig. 2 is a schematic sectional side view of the clamping device shown in Fig. 1. Fig. 3 is a schematic sectional side view of the clamping device according to the first embodiment of the present invention, showing a state in which the work pressing member has descended to fix the work at the reached position.

[0038] As shown in Figures 1 to 3, a clamping device 1 according to a first embodiment of the present invention comprises a base plate 10, a screw shaft 12, a rotating and lifting member 14, a work pressing member 16, a temporary fixation release member 18, and a work pressing member rotation preventing member 20.

[0039] The substrate 10 is a flat plate member, for example, about 300 mm long and about 500 mm wide. Two cylindrical bushes 22a and 22b are arranged on the substrate 10 as work support parts, and are configured so that two works A and B can be set in an overlapping state.

[0040] The screw shaft 12 is erected in the center of the base plate 10, and has a male screw thread formed on its circumferential surface.

[0041] The rotating and lifting member 14 is a cylindrical member having an opening 24 provided in the center thereof, with an internal thread formed on its inner circumferential surface corresponding to the external thread of the screw shaft 12, and a clamping recess 26 provided in the circumferential direction on its outer circumferential side wall for clamping the work pressing member 16. A magnet 28 is provided on the protruding portion below the clamping recess 26 of the rotating and lifting member 14, allowing temporary fixation to the work pressing member 16. In addition, an operating handle 32 is provided on the upper part of the rotating and lifting member 14.

[0042] The work pressing member 16 is a rectangular flat plate member having an insertion hole 30 in its center, the insertion hole 30 is inserted into the screw shaft 12, and the peripheral portion of the insertion hole 30 is clamped from above and below by the clamping recess 26 of the rotating lifting member 14 so as to be synchronously movable, and is temporarily fixed by a magnet 28.

[0043] In addition, the work pressing member 16 has two cylindrical pins 34a, 34b on one side as pressing parts for pressing the workpieces A, B, and has a reaction force receiving part 36 on the other side via the screw shaft 12 for receiving a reaction force caused by the pins 34a, 34b pressing the workpieces A, B.

[0044] The pins 34a, 34b as pressing parts are arranged corresponding to the bushes 22a, 22b, and their tips are inserted into the work openings a, b and the bushes 22a, 22b as the work support parts. The reaction force receiving part 36 is a cylindrical member provided on the opposite side of the pins 34a, 34b with respect to the screw shaft 12, extended from the lower part of the work pressing member 16, and receives a reaction force from the pins 34a, 34b as pressing parts by pressing the substrate 10. The reaction force receiving part 36 is configured to be height adjustable so that it can press the substrate 10 when the pressing part presses the work.

[0045] The work pressing member 16 also has an opening 38 as a portion that engages with the work pressing member rotation preventing member 20 when the work pressing member 16 is lowered and raised.

[0046] The temporary fixation releasing member 18 is a cylindrical member erected at a position adjacent to the work pressing member rotation preventing member 20 on the base plate 10, and abuts against the work pressing member 16, restricting the horizontal rotation at the reached position, thereby releasing the temporary fixation between the work pressing member 16 and the rotating and lifting member 14. As a result, the horizontal rotation of the work pressing member 16 is stopped at the reached position, and the work pressing member 16 only moves up and down together with the rotating and lifting member 14.

[0047] The work pressing member rotation preventing member 20 is a pin member erected on the base plate 10, and is engaged and disengaged with the opening 38 of the work pressing member 16 when the work pressing member 16 descends and ascends. The work pressing member rotation preventing member 20 is configured so that its height is adjustable, and its height is adjusted to be equal to or higher than the maximum height of the workpieces A and B supported by the bushes 22a and 22b of the base plate 10.

[0048] The operation of the clamping device 1 according to the first embodiment of the present invention will be specifically described with reference to Figures 1 to 6. Note that the case where workpieces A and B are fixed will be described. Here, Fig. 4 is a plan view of the clamping device according to the first embodiment of the present invention, showing a state in the initial position, Fig. 5 is a plan view of the clamping device according to the first embodiment of the present invention, showing a state between the initial position and the reached position, and Fig. 6 is a plan view of the clamping device according to the first embodiment of the present invention, showing a state in the reached position.

[0049] 4, the pins 34a and 34b of the work pressing member 16 are in an initial position that is horizontally separated by 90° from the bushes 22a and 22b. Also, the works A and B are set in the bushes 22a and 22b of the substrate 10 in an overlapping state.

[0050] When fixing the workpieces A and B, as shown in Fig. 5, the operating handle 32 of the rotating and lifting member 14 is rotated 90° clockwise, and the rotating and lifting member 14 is horizontally rotated 90° from its initial position along the screw shaft 12. As the rotating and lifting member 14 rotates, the work pressing member 16 temporarily fixed to the rotating and lifting member 14 rotates horizontally. Note that the rotating and lifting member 14 moves up and down (descending) along the screw shaft 12 at the same time as it rotates horizontally, and the work pressing member 16 also descends accordingly.

[0051] Next, as shown in FIG. 6, the pins 34a, 34b of the work pressing member 16 reach above the bushes 22a, 22b (reaching position), and the temporary fixation release member 18 abuts against the work pressing member 16 to restrict the horizontal rotation of the work pressing member 16, and the temporary fixation with the rotating and lifting member 14 is released.

[0052] 2 and 3, when fixing the works A and B, the operation handle 32 of the rotary lift member 14 is further rotated clockwise from this state, so that the work pressing member 16, while held at the reached position, descends with the descent of the rotary lift member 14, and the tips of the pins 34a and 34b are inserted into the work openings a and b and the bushes 22a and 22b, pressing and fixing the works A and B from above. When the work pressing member 16 descends, the work pressing member rotation preventing member 20 is inserted into the opening 38 of the work pressing member 16 and is engaged with the work pressing member 16. When the pins 34a and 34b press the works A and B from above, the reaction force receiving portion 36 uses the reaction force from the substrate 10 to suppress the upward reaction force of the pins 34a and 34b received from the works A and B.

[0053] Next, when releasing the works A and B, the operating handle 32 of the rotary lift member 14 is rotated counterclockwise, and the work pressing member 16, while held at the reached position, rises with the rise of the rotary lift member 14, and the tips of the pins 34a and 34b are removed from the work openings a and b and the bushes 22a and 22b, releasing the works A and B. When the work pressing member 16 rises, the work pressing member rotation preventing member 20 is removed from the opening 38 of the work pressing member 16 and becomes disengaged from the work pressing member 16, and rotates together with the rotary lift member 14, and the work pressing member 16 rotates back to its initial position. The base plate 10 is provided with a stopper 40 for locking the work pressing member 16 at the initial position, and is configured to be able to return to a predetermined initial position.

[0054] Next, a clamp device 2 according to a second embodiment will be described. Note that members having the same configuration as those in the clamp device 1 described above will be given the same reference numerals and descriptions thereof will be omitted.

[0055] Here, FIG. 7 is a perspective view of the clamping device according to the second embodiment of the present invention in the initial position. FIG. 8 is a side view of the clamping device shown in FIG. 7 as seen obliquely from the front, and FIG. 9 is a plan view of the clamping device shown in FIG. 7. FIG. 10 is a perspective view of the clamping device according to the second embodiment of the present invention in the reached position, showing a state in which the work pressing member has rotated horizontally from the initial position and is in a position above the lower jig (reached position). FIG. 11 is a side view of the clamping device shown in FIG. 10 as seen from the front, FIG. 12 is a side view of the clamping device shown in FIG. 10 as seen from the side, and FIG. 13 is a plan view of the clamping device shown in FIG. 10. FIG. 14 is a perspective view of the clamping device according to the second embodiment of the present invention in the reached position, showing a state in which the work pressing member has descended to fix the work at the reached position. FIG. 15 is a front view of the clamping device shown in FIG. 14 as seen from the front, and FIG. 16 is a side view of the clamping device shown in FIG. 14 as seen from the side.

[0056] 7, in the clamp device 2 according to the second embodiment, a square lower jig 44 having four pins 42a to 42d is provided as a work support part on a part of a substrate 10. Furthermore, pins 54a and 54b serving as work pressing member rotation preventing members are provided upright on both sides of the lower jig 44, and further, a pin 54c serving as a work pressing member rotation preventing member is provided upright on the opposite side of the lower jig 44 across the screw shaft 12.

[0057] The work pressing member 16 includes a work pressing member main body 46 formed in a V-shaped flat plate shape, and an upper jig 50 as a pressing part having four bushes 48a-48d provided between the V shapes and corresponding to the four pins 42a-42d of the lower jig 44. The tip of the work pressing member main body 46 is provided with engagement members 52a, 52b having recesses at their tips that engage with pins 54a, 54b as work pressing member rotation preventing members, and an opening 38 that engages with pin 54c as a work pressing member rotation preventing member is provided on the opposite side of the upper jig 50 across the screw shaft 12.

[0058] The work pressing member 16 is also provided with reaction force receiving portions 56a, 56b on the opposite side of the upper jig 50 with respect to the screw shaft 12. A temporary fixation release member 58 is also provided alongside the pin 54a as a work pressing member rotation preventing member.

[0059] The operation of the clamp device 2 according to the second embodiment of the present invention will be specifically described with reference to FIGS.

[0060] First, as shown in Figures 7 to 9, the upper jig 50 of the work pressing member 16 is in an initial position that is horizontally separated by 90° from the lower jig 44. At this time, the upper jig 50 is in a standby state above the initial position. Also, the work C and the works D to G are set on the pins 42a to 42d of the lower jig 44 in an overlapping state.

[0061] When fixing the workpieces C to G, as shown in Figs. 10 to 13, the operating handle 32 of the rotating and lifting member 14 is rotated 90° clockwise, and the rotating and lifting member 14 is horizontally rotated 90° from its initial position along the screw shaft 12. As the rotating and lifting member 14 rotates, the work pressing member 16 temporarily fixed to the rotating and lifting member 14 rotates horizontally. Note that the rotating and lifting member 14 moves up and down (descending) along the screw shaft 12 at the same time as it rotates horizontally, and the work pressing member 16 also descends accordingly.

[0062] 10 to 13, the upper jig 50 of the work pressing member 16 reaches above the lower jig 44 (the reached position), and the temporary fixation releasing member 58 comes into contact with the work pressing member 16 to restrict the horizontal rotation of the work pressing member 16, thereby releasing the temporary fixation with the rotating and lifting member 14. At this time, the upper jig 50 is in a standby state above the reached position.

[0063] 14 to 16, by further rotating the operating handle 32 of the rotating and lifting member 14 clockwise, the work pressing member 16, while being held at the reached position, descends in conjunction with the descent of the rotating and lifting member 14, and the bushes 48a to 48d of the upper jig 50 are inserted into the tips of the pins 42a to 42d of the lower jig 44, pressing and fixing the works C to G from above. Furthermore, when the work pressing member 16 descends, the pins 54a, 54b are inserted into the recesses of the engaging members 52a, 52b of the work pressing member 16, and the pin 54c is inserted into the opening 38 of the work pressing member 16, thereby engaging with the work pressing member 16. In addition, when the bushes 48a to 48d of the upper jig 50 press the workpieces C to G from above, the reaction force receiving portions 56a, 56b utilize the reaction force from the substrate 10 to suppress the upward reaction force received by the bushes 48a to 48d from the workpieces C to G.

[0064] Next, when releasing the workpieces C to G, by rotating the operating handle 32 of the rotating lifting member 14 counterclockwise, the work pressing member 16, while held at the reached position, rises with the rising of the rotating lifting member 14, and the bushes 48a to 48d of the upper jig 50 are removed from the tips of the pins 42a to 42d of the lower jig 44, releasing the workpieces C to G. Also, when the work pressing member 16 rises, the pins 54a to 54c are removed from the engaging members 52a, 52b and the opening 38 of the work pressing member 16 and become disengaged from the work pressing member 16, and then rotate together with the rotating lifting member 14, and the work pressing member 16 rotates back to its initial position. [Industrial Applicability]

[0065] INDUSTRIAL APPLICABILITY The clamping device of the present invention is industrially useful since it can be used to fix a workpiece for use in processing such as welding. [Explanation of symbols]

[0066] 1 Clamping device (first embodiment) 2 Clamping device (second embodiment) 10 Substrate 12 Screw shaft 14 Rotating lifting member 16 Work pressing member 18 Temporary fixing release member 20 Work pressing member rotation prevention member 22a, 22b Bush (work support part) 24 (Opening of rotating lifting member) 26 Clamping recess 28 Magnet 30 Insertion hole 32 Operating handle 34a, 34b Pin (pressing part) 36 Reaction receiving part 38 (Work pressing member) opening 40 Stopper 42a~42d Pin 44 Lower jig 46 Work pressing member body 48a~48d Bush 50 Upper jig 52a, 52b Engagement members 54a to 54c Pins (work pressing member rotation prevention members) 56a, 56b Reaction receiving part 58 Temporary fixing release member A,B Work C~G work a,b Work opening

Claims

1. A clamping device in which a pressing portion of a work pressing member horizontally rotates from an initial position away from the work support portion to reach the work support portion, and at the reached position, lowers to press and fix the work from above, and the pressing portion of the work pressing member rises to release the fixed work, and then rotates back to the initial position, A screw shaft erected on the substrate; A rotating and lifting member that is screwed onto the screw shaft and rotates and moves up and down along the screw shaft; a work pressing member which is inserted through the screw shaft and is temporarily fixed by being clamped from above and below so as to be movable synchronously with the rotary lifting member, the work pressing member having a pressing part on one side thereof for pressing the work supported by the work support part, and a reaction force receiving part on the other side via the screw shaft for receiving a reaction force caused by the pressing part pressing the work; a temporary fixation release member that limits the horizontal rotation of the work pressing member at the reached position and releases the temporary fixation between the work pressing member and the rotary lifting member; a work pressing member rotation preventing member that is provided on the base plate and that is engaged and disengaged with the work pressing member when the work pressing member is lowered and raised; Equipped with The pressing portion of the workpiece pressing member is When the workpiece is fixed, the workpiece is horizontally rotated from an initial position to the arrival position in accordance with the rotation of the rotary lift member, and the temporary fixation with the rotary lift member is released by the temporary fixation release member. In a state where the workpiece is held at the arrival position, the workpiece is lowered to a position where the workpiece is pressed in accordance with the descent of the rotary lift member. When the work is released, in a state in which the work is held at the reaching position, the work pressing member rises with the rise of the rotary lift member until it is disengaged from the rotation preventing member, and then rotates back to the initial position with the rotation of the rotary lift member. A clamping device characterized by:

2. 2. The clamp device according to claim 1, wherein the workpiece pressing member rotation preventing member is adjustable in height.

3. 2. The clamping device according to claim 1, wherein the height of said work pressing member rotation preventing member is adjusted to be equal to or higher than the maximum height of the work supported by the work supporting portion of said base plate.

4. 2. The clamping device according to claim 1, wherein the workpiece pressing member and the rotary lifting member are temporarily fixed by magnets.

5. 2. The clamping device according to claim 1, wherein the pressing portion of the work pressing member and the work supporting portion of the base plate are provided with a combination of a pin and a bush.

6. 2. The clamping device according to claim 1, wherein the workpiece pressing member has a horizontal rotation angle of 90 degrees.

7. 2. The clamping device according to claim 1, wherein the temporary fixation releasing member is provided adjacent to a workpiece pressing member rotation preventing member provided upright on the base plate.

Images