JP4951405B2 - Positioning clamp device - Google Patents

Description

  The present invention relates to a positioning clamp device that positions and clamps a panel material by fitting a locating pin into a positioning hole formed in the panel material, and particularly positions the panel material regardless of whether the positioning hole is a round hole or a square hole. The present invention relates to a positioning clamp device which can be made.

  An automobile body is formed by joining a plurality of panel materials by spot welding. When spot welding is performed, it is necessary to position and clamp various panel materials constituting the automobile body. Therefore, a plurality of positioning clamp devices are attached to the welding stage arranged in the automobile production line in order to position and clamp the panel material. Further, a positioning clamp device is attached to the tip of the robot arm, and the panel material is moved to a predetermined position by operating and moving the robot arm with the panel material positioned and clamped. Further, when the panel material is conveyed by the traveling carriage, a positioning clamp device is mounted on the traveling carriage so that the panel material is conveyed by the traveling carriage in a state where the panel material is clamped.

As an apparatus for positioning and clamping a panel material, there is an apparatus having a fixed locating pin that fits into a positioning hole formed in the panel material and a clamp arm incorporated in a slit formed in the locating pin. In this type of positioning clamp device, the panel material is fitted to the locating pin with the clamp arm inserted into the slit, and when clamping the panel material, the clamp arm is pushed out from the slit. There are two types of panel materials, one with a circular positioning hole and the other with a square or rectangular square hole. Of the locating pins, the panel material can be clamped to position and clamp any type of panel material. A clamping device has been developed in which a guide portion is left so as not to form a slit at a portion where the panel material comes into contact with when clamping.
JP 2002-321130 A

  In conventional clamping devices that can position and clamp both a panel material having a round positioning hole and a panel material having a square positioning hole, it is formed on a fixed locating pin. The slit is left as a guide portion without forming a slit at a portion where the panel material contacts at the time of clamping. Therefore, it is necessary to provide a clamp piece with a J-shape bent at the tip of the clamp arm, and to guide the guide part into the recess of the clamp piece during clamping. For this reason, it is necessary to increase the width of the clamp piece at the tip of the clamp arm, and if the locate pin has a small diameter in order to position and clamp a panel material having a small positioning hole, the clamp arm is placed in the locate pin. Cannot be incorporated. Therefore, in the conventional clamp device for positioning two types of panel materials, round holes and square holes, there is a limit to the size of the positioning holes that can be positioned.

  An object of the present invention is to enable positioning and fixing of a panel material having a positioning hole having a small size.

The positioning clamp device according to the present invention includes a workpiece support surface on which a workpiece support surface that supports a panel material having a circular or quadrilateral positioning hole is formed, and an axial direction protruding from the workpiece support surface on the workpiece support surface. A locating pin that is reciprocally attached to the positioning hole, and a retraction position that is provided in a slit formed in the locating pin so as to open on an outer peripheral surface of the locating pin, and a retraction position that enters the slit. The clamp arm is movable back to the clamping position where the front end portion protrudes from the slit and clamps the panel material, and is incorporated in the work support, and applies a spring force in the forward direction to the locate pin. A spring member is provided at a radial end of the slit, and the locate pin is moved forward while the locate pin is moved forward. A guide portion having a circular outer peripheral surface of the locate pin continuous with a portion facing the positioning hole when the positioning hole is fitted to the support pin, and a distal end portion of the clamp arm, and the clamp arm is retracted When moving from a position to the clamp position, the panel member is brought into contact with the guide portion and moved backward against the spring force to slide the locate pin along the panel material. A clamp piece to be clamped between and a workpiece support base that is reciprocally mounted in the axial direction and connected to the clamp arm, and drives the clamp arm between the retracted position and the clamp position. A piston rod, and when the piston rod moves forward and the clamp arm is in the retracted position, An abutment surface which abuts the piston rod is formed in the locating pin, the piston rod is characterized in that it restricts the rearward movement of the locating pin in contact with the locating pin.

  The positioning clamp device according to the present invention is characterized in that the guide portion is provided at two locations corresponding to both ends in the radial direction of the slit.

  According to the present invention, the clamp arm for clamping the panel material to the work support surface is provided in the slit formed by opening the locating pin to the outside, and the locating pin is in a state in which it is moved forward. Originally, a guide part with a continuous circular outer peripheral surface of the locate pin is provided in the part facing the positioning hole when the positioning hole is fitted to the locate pin, so the positioning hole of the panel material is fitted to the locate pin Then, since the positioning hole comes into contact with the outer peripheral surface of the guide portion, both the panel material in which the quadrangular positioning hole made of a square or rectangle is formed and the panel material in which the circular positioning hole is formed are positioned. be able to.

  When clamping the panel material by pushing the clamp piece at the tip of the clamp arm out of the slit, the clamp piece comes into contact with the guide part and the locating pin is moved backward, so the panel material is clamped. The panel material can be clamped without the need to provide a recess for entering and without increasing the size of the clamp piece. Thereby, since the panel material can be clamped even if the locating pin has a small diameter, the panel material having a small size of the positioning hole can also be positioned and clamped.

  When clamping the panel material, the locating pin slides on the inner peripheral surface of the positioning hole. Therefore, the center of the positioning hole of the panel material can be centered on the center of the locating pin, and the positioning accuracy can be improved.

  The positioning clamp device of the present invention has a piston rod for driving the clamp arm between the retracted position and the clamp position, and the locating pin comes into contact when the piston rod reaches the forward limit position. A surface is formed. As a result, when the locate pin reaches the retracted position which is the forward limit position, the locate pin is locked by the piston rod, and even if the panel material collides with the locate pin under this state, the movement of the locate pin is restricted, The locating pin can be reliably fitted into the positioning hole of the panel material.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a cross-sectional view showing a positioning clamp device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a part of FIG. 1 in an enlarged manner, and FIG. FIG. 4 is an exploded perspective view of members constituting the positioning clamp device.

  As shown in FIG. 1, this positioning clamp device has a cylindrical support cylinder 11 having a flange 10 at the base end, and a cylinder body 12 is attached to the flange 10, and the support cylinder A workpiece receiving cylinder 13 is attached to the tip of 11. As shown in FIGS. 2 and 3, the work receiving cylinder 13 is formed with a fitting portion 15 that fits in a fitting hole 14 formed at the distal end of the support cylinder 11 at the base end. A work support 16 is formed by the body 13 and the support cylinder 11. The front end surface of the workpiece receiving body 13 is a workpiece support surface 17 that supports the panel material W.

  A positioning tool 20 is mounted in the work support 16 so as to be capable of reciprocating in the axial direction. As shown in FIG. 4, the positioning tool 20 is slidably in contact with the inner peripheral surface of the support cylinder 11. A cylindrical body 21 and a locating pin 22 that protrudes from the front end surface of the guide cylindrical body 21 and is integrated with the guide cylindrical body 21 are provided. The locating pin 22 penetrates the through hole 23 of the workpiece receiving cylinder 13 and protrudes from the workpiece supporting surface 17 so as to be reciprocable in the axial direction. The locating pin 22 is fitted in a positioning hole formed in the panel material W and is attached to the panel material W. Positioning.

  As shown in FIGS. 2 to 4, the locating pin 22 is formed with a slit 24 that opens to the outer peripheral surface of the locating pin 22, and this slit 24 leaves the connecting portion 25 at the base end portion of the guide cylinder 21 and guide cylinder. It extends to the body 21. The slit 24 is not formed in the tip portion 22a of the locate pin 22, and the tip portion 22a is a connecting portion. A clamp arm 26 is provided in the slit 24, and a clamp piece 27 that clamps the panel material W between the work support surface 17 at the tip of the work support 16 is provided at the tip of the clamp arm 26. Yes.

  As shown in FIG. 1, a piston rod 30 is attached to a piston 29 that is mounted in the cylinder chamber 28 of the cylinder body 12 so as to be capable of reciprocating in the axial direction, and the piston rod 30 projects into the work support 16. The lever can reciprocate in the axial direction. The piston rod 30 is connected to the proximal end portion of the clamp arm 26 by a connecting pin 31 at the distal end portion. As shown in FIG. 3, both ends of the connecting pin 31 are slidably supported in a long hole 32 formed along the axial direction on the support cylinder 11, and the length of the long hole 32 in the axial direction is supported. Substantially corresponds to the reciprocating stroke of the piston rod 30. Therefore, when the piston rod 30 moves forward, the clamp arm 26 moves forward toward the tip of the locate pin 22, and when the piston rod 30 moves backward, the clamp arm 26 moves backward.

  The tip of the piston rod 30 enters the guide cylinder 21 of the locate pin 22, and when the piston rod 30 moves to the forward limit position, the locate pin 22 contacts the contact surface 30 a at the tip of the piston rod 30. A contact surface 22b is formed on the locate pin 22. Thus, when the piston rod 30 is in the forward limit position and the contact surfaces 30a and 22b are in contact with each other, the piston rod 30 in the forward limit position restricts the backward movement of the locate pin 22, and the front end surface of the locate pin 22 has a panel. Even if the material collides, the locating pin 22 is prevented from moving backward in the axial direction.

  As shown in FIG. 2, a cam groove 33 is formed in the clamp arm 26 in the axial direction, and a cam pin 34 parallel to the connecting pin 31 passes through the cam groove 33. As shown in FIG. 3, the cam pin 34 is fixed to a mounting hole 35 formed in the support cylinder 11 of the work support 16. As shown in FIG. 3, both end surfaces of the connecting pin 31 and the cam pin 34 are covered with a cover 36 attached to the support cylinder 11 of the work support 16. As shown in FIG. 2, the cam groove 33 has a straight portion 33 a that is parallel to the longitudinal direction of the clamp arm 26 and an inclined portion 33 b that is continuous with the rear end portion thereof. Therefore, when the clamp arm 26 moves forward as indicated by the two-dot chain line in FIG. 2 due to the forward movement of the piston rod 30, the cam pin 34 enters the inclined portion 33b of the cam groove 33, so that the clamp arm 26 moves into the slit 24. The retracted position is entered. On the other hand, when the piston rod 30 moves backward, the clamp arm 26 moves backward as shown by a solid line in FIG. At this time, the cam pin 34 enters the straight portion 33 a of the cam groove 33, and the tip end portion of the clamp arm 26 protrudes from the slit 24. When the piston rod 30 reaches the retreat limit position, the clamp piece 27 provided at the tip of the clamp arm 26 becomes a clamp position for clamping the panel material W between the workpiece support surface 17. 2 and 3 show a state in which the panel material W is not fitted to the locating pin 22, and when the panel material W is not disposed on the work support 16, the clamp arm 26 is in the retreat limit position. Then, the clamp piece 27 comes into contact with the workpiece support surface 17.

  As shown in FIG. 1, a head cover 37 is provided at the rear end of the cylinder body 12, and the cylinder chamber 28 is partitioned by a piston 29 into a forward pressure chamber 28 a and a backward pressure chamber 28 b. In the cylinder body 12, a forward supply / discharge port 38 is formed in communication with the forward pressure chamber 28a, and a reverse supply / discharge port 39 is formed in communication with the reverse pressure chamber 28b. . Accordingly, when compressed air is supplied from the supply / discharge port 38 to the forward pressure chamber 28a, the piston rod 30 is driven toward the forward limit position, and when compressed air is supplied from the supply / discharge port 39 to the backward pressure chamber 28b. The piston rod 30 is driven toward the backward limit position. Thus, the cylinder body 12 is a double-acting type in which the pressure chambers 28 a and 28 b are provided on both sides of the piston 29.

  As shown in FIGS. 2 and 4, the locate pin 22 is provided with guide portions 41 so as to partially fill both ends in the radial direction of the slit 24. The guide portion 41 is provided at a portion facing the positioning hole when the positioning hole of the panel material W is fitted to the locating pin 22 in a state where the locating pin 22 is moved forward as indicated by a two-dot chain line in FIG. The outer peripheral surface of the guide portion 41 is an arc-shaped outer peripheral surface 42. Thereby, the outer peripheral surface of the locate pin 22 in the part in which the guide part 41 is provided is circular as a whole. The length of the guide portion 41 in the axial direction is larger than the thickness of the panel material W, and the lower end portion of the guide portion 41 is placed in the through hole 23 of the workpiece receiving cylinder 13 when the locate pin 22 reaches the forward limit position. It is set to enter.

  As shown in FIGS. 2 to 4, a flange 43 having a diameter larger than that of the guide cylinder 21 is provided at the upper end portion of the guide cylinder 21 of the positioning tool 20. A compression coil spring 45 is incorporated by bringing both ends into contact with the stepped portion 44 formed in the support cylinder 11, and a spring force in the forward direction is applied to the locate pin 22 by the compression coil spring 45. . Therefore, when the clamp arm 26 is in the forward limit position, the locating pin 22 causes the end face of the guide cylinder 21 to contact the abutting surface 46 of the workpiece receiving cylinder 13 by the spring force of the compression coil spring 45. Will move to. At this time, the guide part 41 protrudes from the work support surface 17.

  On the other hand, as shown in FIG. 2, when the clamp arm 26 is moved backward by the piston 29, the cam pin 34 enters the straight portion 33 a of the cam groove 33, so that the clamp piece 27 at the tip of the clamp arm 26 protrudes from the slit 24. The clamp piece 27 comes into contact with the guide portion 41 by the backward movement of the clamp arm 26 and moves the locating pin 22 backward against the spring force of the compression coil spring 45. Thus, when the clamp arm 26 moves the locating pin 22 backward through the guide portion 41, the locating pin 22 slides along the inner peripheral surface of the positioning hole of the panel material W. When the clamp arm 26 moves the locating pin 22 backward until the tip surface of the guide portion 41 is at the same position as the surface of the panel material W, the panel material W is clamped or fastened between the clamp piece 27 and the work support surface 17. .

  Thus, when the clamp arm 26 is driven between the forward limit position and the backward limit position by the reciprocating movement of the piston rod 30, in order to avoid interference between the connecting pin 31, the cam pin 34, and the positioning tool 20, the positioning tool As shown in FIG. 4, the 20 guide cylinders 21 are formed with notches 47 with a phase of approximately 90 degrees in the circumferential direction with respect to the slit 24, and the notches 47 are formed in the guide cylinder 21. Open to the base end face.

  5A is a cross-sectional view of the locate pin 22 showing a state in which the locate pin 22 is fitted in a circular positioning hole Ha formed in the panel material W, and FIG. 5B is formed in the panel material W. It is a cross-sectional view of the locate pin 22 showing a state in which the locate pin 22 is fitted in the square positioning hole Hb.

  When the locate pin 22 is in the forward position, the guide portion 41 faces the portion of the locate pin 22 where the panel material W is fitted, so that the panel is placed on the locate pin 22 as shown in FIG. When the circular positioning hole Ha of the material W is fitted, the part of the guide portion 41 including the arc-shaped outer peripheral surface 42 that is completely circular comes into contact with the positioning hole Ha, and the panel material W is positioned by the locate pin 22. The On the other hand, as shown in FIG. 5 (B), the arcuate outer peripheral surface 42 of the guide portion 41 is brought into contact with the center portion of the two opposite sides of the positioning hole Hb in the width direction so that the panel material W is placed on the locate pin 22. When the square positioning hole Hb is fitted, the position of the panel member W in the left-right direction in FIG. 5 (B) is such that the guide portion 41 contacts two opposite sides of the square positioning hole Hb and is perpendicular to this. Since the center portion of the outer peripheral surface of the locate pin 22 contacts the other two sides of the positioning hole Hb, the center position of the positioning hole Hb is also set to the center position of the locate pin 22 in the panel material W having the positioning hole Hb that is a square hole. The panel material W can be positioned by matching. Further, as shown by a two-dot chain line in FIG. 5B, the panel material W in which the rectangular positioning holes Hc are formed can be positioned. When positioning such a panel material W, if the width dimension of the rectangular positioning hole Hc substantially corresponds to the diameter of the locate pin 22, the panel material W can be positioned in the left-right direction in FIG. it can. However, in that case, the panel material W is positioned in the vertical direction in FIG. 5B by the locate pin of another positioning clamp device.

  Moreover, when the panel member W is clamped between the clamp piece 27 and the workpiece support surface 17 by moving the clamp arm 26 backward, the locating pin 22 is driven backward in synchronization with the backward movement of the clamp arm 26 and the panel material. Since the locating pin 22 slides on the inner peripheral surface of the positioning holes Ha, Hb, Hc of W, the panel material W is arranged so that the center of the positioning holes Ha, Hb, Hc coincides with the center of the locating pin 22 by this sliding movement. It will be aligned. In particular, since the guide portions 41 are provided at two locations in the radial direction both ends of the slit 24, that is, at a phase of 180 degrees in the circumferential direction of the locate pin 22, the panel member W is moved by the sliding movement of the two guide portions 41. In FIG. 5, the panel material W can be positioned with high accuracy by being aligned in the left-right direction.

  As described above, the clamp piece 27 provided at the distal end of the clamp arm 26 clamps the panel material W in a state where the locate pin 22 is pressed by the guide portion 41 after the locate pin 22 is moved backward. In addition, since the guide portion 41 has entered the slit 24, it is sufficient that the clamp surface dimension of the clamp piece 27 is a projection length sufficient to clamp the panel material W, and the positioning pin 22 has a small diameter and a small positioning hole. The panel material W which has can also be positioned and clamped.

  That is, the clamp width of the clamp piece 27 is the dimension E as shown in FIG. 2, the thickness is the dimension D as shown in FIG. The part obtained by subtracting the thickness dimension of the panel contacts the panel material W. If the guide portion 41 is not moved, the clamp piece 27 needs to be bent into a J-shape and the recess into which the guide portion enters is formed in the clamp piece 27 as in Patent Document 1, so that the guide portion jumps. It is necessary to increase the width dimension E of the portion in contact with the panel material W or increase the thickness dimension D. However, in this positioning clamp device, the clamp surface of the clamp piece 27 can be made flat. The panel material W can be reliably clamped without increasing the dimension D and the width dimension E. Since it is not necessary to increase the width dimension E, it is possible to make the locate pin 22 have a small diameter.

  6-9 is sectional drawing which shows the positioning clamp operation | movement of the panel material W by the positioning clamp apparatus. As shown in FIG. 6, the clamp arm 26 is retracted into the slit 24 with the piston rod 30 as the forward limit position and the guide pin 41 is protruded from the work support surface 17 with the locate pin 22 as the forward limit position. Then, the positioning hole of the panel material W is fitted into the locate pin 22. For example, if the positioning clamp device is used for spot welding two panels constituting an automobile body, the two panel members W are fitted to the locate pins 22. At this time, the piston rod 30 is in the forward limit position, and the contact surface 30a at the tip thereof is in contact with the contact surface 22b provided on the locating pin 22. Therefore, the piston rod 33 fixed at the forward limit position. Thus, the locate pin 22 is fixed and the backward movement is restricted. Thereby, when the panel material W is positioned and fitted to the locate pin 22, even if the panel material W collides with the tip of the locate pin 22, the locate pin 22 can maintain the forward limit position.

  When the piston rod 30 is in the forward limit position and compressed air is supplied from the supply / discharge port 39 shown in FIG. As shown, the cam pin 34 enters the straight portion 33 a of the cam groove 33, and the clamp arm 26 is in a state in which the clamp piece 27 at the tip protrudes from the slit 24. When the clamp arm 26 moves backward by the subsequent backward movement of the piston rod 30, the clamp piece 27 of the clamp arm 26 comes into contact with the guide portion 41 as shown in FIG.

  Further, when the piston rod 30 is moved backward, the locating pin 22 is pushed by the clamp piece 27 and moved backward. When the clamp piece 27 comes into contact with the surface of the panel material W, the panel material W becomes the clamp piece as shown in FIG. 27 and the workpiece support surface 17 are clamped. At the time of the backward movement, the locating pin 22 moves backward against the spring force applied by the compression coil spring 45, and when the panel material W is clamped, the front end surface of the guide portion 41 is at the same position as the surface of the panel material W. It becomes. Thus, the locate pin 22 is pressed by the clamp piece 27 at the guide portion 41.

  Whether the panel material W has a round positioning hole Ha or the panel material W has square or rectangular positioning holes Hb and Hc, the positioning is performed by the same procedure without replacing the locate pin 22. Can be clamped. Moreover, since the locate pin 22 is slid in the axial direction with respect to the panel material W in synchronization with the backward movement of the clamp arm 26, it can be clamped after finely adjusting the positioning of the panel material W by a sliding operation, Positioning accuracy can be increased.

  10A is a perspective view showing a modification of the locate pin 22, and FIG. 10B is a cross-sectional view taken along line 10B-10B in FIG. 10A. FIG. 11A is a perspective view showing another modification of the locate pin 22, and FIG. 11B is a sectional view taken along the line 11B-11B in FIG. 11A. 12A is a perspective view showing still another modified example of the locate pin 22, and FIG. 12B is a cross-sectional view taken along the line 12B-12B in FIG.

  The locating pin 22 is integrally provided with the guide portion 41, and the locating pin 22 is manufactured so as to leave the portion of the guide portion 41 when the slit 24 is processed in the locating pin material. On the other hand, in the locate pin 22 shown in FIGS. 10 to 12, the guide portion 41 is assembled to the locate pin 22.

  In the locate pin 22 shown in FIG. 10, a frame-shaped guide piece 52 in which two guide portions 41 and a connecting portion 51 for connecting them are integrated is assembled. A mounting groove 53 into which the connecting portion 51 of the guide piece 52 enters is formed in the locating pin 22 so as to open into the slit 24, and the guide piece 52 is assembled to the locating pin 22 by sliding the guide piece 52 into the mounting groove 53. It is like that. Even if the locating pin 22 is in the forward limit position, the guide piece 52 is inserted into the through hole 23 of the workpiece receiving cylinder 13 even if the locating pin 22 is in the forward limit position. The guide piece 52 does not come off the locating pin 22 during the reciprocating motion.

  In the locate pin 22 shown in FIG. 11, a plate-shaped guide piece 54 that constitutes the guide portion 41 is assembled with an arcuate outer surface. A mounting groove 55 to which the guide piece 54 is attached is formed in the locate pin 22, and the guide portion 41 is assembled to the locate pin 22 by inserting the guide piece 54 as the guide portion 41 into the attachment groove 55. As shown in FIG. 11B, the guide piece 54 is inserted into the through hole 23 of the workpiece receiving cylinder 13 even when the locating pin 22 is at the forward limit position. Even if the locating pin 22 is not welded, the guide piece 54 does not come off the locating pin 22 when the locating pin 22 reciprocates.

  In the locate pin 22 shown in FIG. 12, as in the case shown in FIG. 11, a plate-like guide piece 56 constituting the guide portion 41 is assembled with the outer surface being an arcuate surface. A projection 57 that protrudes outward is provided on the outer surface of the guide piece 56, and a guide groove 58 in which the projection 57 is slidably engaged with the through hole 23 of the workpiece receiving cylinder 13. Is formed.

  As described above, the guide portion 41 provided on the locating pin 22 may be formed integrally with the locating pin 22, and as shown in FIGS. 10 to 12, the locating pin 22 and a separate guide piece are arranged. 22 may be assembled.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, although the guide part 41 is provided in two places in the locate pin 22, if the slit 24 is formed by opening only one side without penetrating the slit 24 in the radial direction and forming the slit 24, The guide part 41 can also be provided in only one place. In the illustrated apparatus, one clamp arm 26 is incorporated in the slit 24. However, two clamp arms 26 may be incorporated in the slit 24. The clamp pieces 27 are opposite to each other, and the clamp pieces 27 protrude from both sides of the slit 24 to clamp the panel material W.

It is sectional drawing which shows the positioning clamp apparatus which is one embodiment of this invention. It is sectional drawing which expands and shows a part of FIG. It is sectional drawing which follows the 3-3 line in FIG. It is a disassembled perspective view of the member which comprises a positioning clamp apparatus. (A) is a cross-sectional view of a locating pin showing a state where the locating pin is fitted in a circular positioning hole formed in the panel material, and (B) is a locating pin fitted in a square positioning hole formed in the panel material. It is a cross-sectional view of the locate pin showing the combined state. It is sectional drawing which shows the positioning clamp operation | movement of the panel material by a positioning clamp apparatus. It is sectional drawing which shows the positioning clamp operation | movement of the panel material by a positioning clamp apparatus. It is sectional drawing which shows the positioning clamp operation | movement of the panel material by a positioning clamp apparatus. It is sectional drawing which shows the positioning clamp operation | movement of the panel material by a positioning clamp apparatus. (A) is a perspective view which shows the modification of a locate pin, (B) is sectional drawing which follows the 10B-10B line in (A). (A) is a perspective view which shows the other modification of a locate pin, (B) is sectional drawing which follows the 11B-11B line in (A). (A) is a perspective view which shows the further another modification of a locate pin, (B) is sectional drawing which follows the 12B-12B line | wire in (A).

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Support cylinder 12 Cylinder main body 13 Work receiving cylinder 16 Work support stand 17 Work support surface 20 Positioning tool 22 Locate pin 23 Through hole 24 Slit 25 Connection part 26 Clamp arm 27 Clamp piece 28 Cylinder chamber 31 Connection pin 32 Long hole 33 Cam Groove 34 Cam pin 41 Guide portion 42 Arc-shaped outer peripheral surface 45 Compression coil spring (spring member)
47 Notch

Claims (2)

A work support base on which a work support surface for supporting a panel material on which circular or quadrilateral positioning holes are formed;
A locating pin that protrudes from the workpiece support surface to the workpiece support base and is reciprocally mounted in the axial direction, and fits into the positioning hole;
The locating pin is provided in a slit formed on the outer peripheral surface of the locating pin and is retracted into the slit and moved backward from the retracted position so that the front end portion protrudes from the slit to clamp the panel material. A clamp arm that is movable to the clamping position to be
A spring member incorporated in the work support and applying a spring force in a forward direction to the locate pin;
The outer peripheral surface of the locating pin is provided at a portion facing the positioning hole when the positioning hole is fitted to the locating pin with the locating pin being forwardly moved, provided at a radial end of the slit. A circular guide part;
Provided at the tip of the clamp arm, when the clamp arm moves from the retracted position to the clamp position, the locating pin is moved backward against the spring force by abutting against the guide portion, and the locating pin is moved to the panel. A clamp piece for clamping the panel material between the workpiece support surface after sliding along the material ;
A piston rod that is reciprocally mounted in the workpiece support base in an axial direction and connected to the clamp arm, and drives the clamp arm between the retracted position and the clamp position;
When the piston rod moves forward and the clamp arm is in the retracted position, a contact surface that contacts the piston rod is formed on the locate pin, and the piston rod contacts the locate pin and the locate pin moves backward. The positioning clamp device characterized by restricting . 2. The positioning clamp device according to claim 1, wherein the guide portion is provided at two positions corresponding to both ends in the radial direction of the slit.

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