JP5385622B2 - Locate clamp device and work panel clamping method - Google Patents

Description

  The present invention relates to a locate clamp device and a work panel clamping method for clamping a work panel, and more particularly to a technique for temporarily holding a work panel without changing its posture before clamping.

  For example, there is a locating clamp device that holds the work panel by inserting a locating pin into a locating hole formed in the work panel and clamping a peripheral portion of the locating hole with a claw portion of a clamp arm.

  In this type of clamping device, the work panel is not lifted from the work mounting surface formed on the locate pin or the work itself does not roll between the time when the work panel is set in the press machine and the time when the press switch is pressed. Therefore, a temporary holding means for temporarily holding the work panel is required (for example, see Patent Document 1).

  In the technique described in Patent Document 1, the clamp arm is held at the temporary holding position by urging the spring plunger against the clamp arm having the claw portion.

JP 2003-53636 A

  However, in the technique described in Patent Document 1, since a spring plunger is used, when an excessive load acts on the clamp arm from the work panel, the clamp arm is pushed back into the locate pin against the biasing force of the spring plunger. It may become impossible to temporarily hold the work panel. If the pressing switch is pressed without maintaining the temporary holding, the work panel cannot be accurately formed, and there is a risk that wrinkles may occur or a part different from the original forming position may be formed.

  Accordingly, an object of the present invention is to provide a locate clamp device and a work panel clamping method capable of holding a temporary holding position without changing the posture of the work panel before clamping.

In the locate clamp device of the present invention, the clamp arm drive means for moving the clamp arm is configured by connecting two drive cylinders in the axial direction, and the first piston of one of the drive cylinders (first drive cylinder). The clamp arm is moved between the unclamping position and the clamping position, and the second piston of the other driving cylinder (second driving cylinder) is brought into contact with the first piston to position and hold the temporary holding position of the clamping arm. Configured. The cylinder chamber of the first drive cylinder is formed by the first piston, the first return side port located on the second drive cylinder side, and the first return side port via the first piston 18. A first outlet port located in the opposite direction is partitioned, and air is always supplied from the air supply means to the first outlet port regardless of the clamp position.

In the work panel clamping method of the present invention, in addition to the unclamping position and the clamping position of the clamp arm, the claw portion formed at the tip of the clamp arm has a gap wider than the thickness of the work panel with respect to the work placement surface. The clamp arm is also moved to a temporary holding position where it is positioned so as to be free. In this case, when the clamp arm is in the temporary holding position, the second drive cylinder is operated to bring the second piston into contact with the first piston to hold the temporary holding position of the clamp arm. Note that air is always supplied to the first outlet port of the first drive cylinder regardless of the clamp position.

  According to the locate clamp device of the present invention, the clamp arm is moved to the unclamping position and the clamping position by the first piston of one of the two connected driving cylinders, and the second piston of the other driving cylinder is used. Since the temporary holding position of the clamp arm is positioned and held in contact with the first piston, the temporary holding state of the work panel can be held, and the change in the posture of the work panel before clamping can be suppressed. Therefore, it becomes possible to clamp a work panel more correctly and press work can be performed accurately.

  In the work panel clamping method of the present invention, the second piston is brought into contact with the first piston, and the clamp arm moved by the first piston is moved not only to the unclamping position and the clamping position but also to the temporary holding position. Therefore, the posture change of the work panel before clamping can be suppressed.

FIG. 1 is a perspective view showing a locate clamp device of the present embodiment. FIG. 2 is an enlarged cross-sectional view of a main part showing a tip portion of the locate clamp device of FIG. 3 is a longitudinal sectional view taken along the line AA in FIG. FIG. 4 is a longitudinal sectional view of the locate clamp device showing a state where the clamp arm is positioned and held at the temporary holding position. FIG. 5 is a longitudinal sectional view of the locate clamp device showing a state in which the clamp arm is positioned and held at the clamp position.

  Hereinafter, a specific locate clamp device to which the present invention is applied will be described in detail with reference to the drawings.

“Description of the configuration of the locate clamp device”
FIG. 1 is a perspective view showing a locate clamp device according to the present embodiment, FIG. 2 is an enlarged cross-sectional view showing a main portion of the tip portion of the locate clamp device shown in FIG. 1, and FIG. 3 is a longitudinal cross-sectional view taken along line AA in FIG. It is.

  As shown in FIGS. 1 to 3, the locate clamp device of the present embodiment is a device for positioning and clamping, for example, a work panel, which is a panel material constituting an automobile body, on a press machine or the like. This locating clamp device 1 includes a locating pin pressing member 3 having a workpiece mounting surface 2 on which a workpiece panel WP is mounted, and a locating pin pressing member so that a tip portion 4a protrudes upward from the workpiece mounting surface 2. 3, the locating pin 4 inserted and fitted into the positioning hole H formed in the work panel WP, and the locating pin 5 formed in the locating pin 4 so as to be movably provided and the work placing surface. A clamp arm 6 having a claw portion 6a for pressing the work panel WP placed on the workpiece placement surface 2 at the tip, a fixed pin holder 7 for supporting the locate pin holding member 3 and the locate pin 4, and the clamp arm 6 Clamp arm driving means for allowing movement, and workpiece detection for detecting whether or not the workpiece panel WP is placed on the workpiece placing surface 2 And a stage.

  As shown in FIG. 1, the fixed work cradle 7 has a mounting flange portion 7a and a cylindrical portion 7b integrated therewith, and the mounting flange portion 7a is attached to a predetermined assembly stage in an automobile production line. It is arranged by bolting. Clamp arm driving means for making the clamp arm 6 movable is fixed to the lower end surface of the mounting flange portion 7a.

  The locate pin pressing member 3 has a small diameter cylindrical portion 3a formed with a work placement surface 2 on which the work panel WP is placed, and a large diameter cylindrical portion 3b integrally formed at the lower end of the small diameter cylindrical portion 3a. The locating pin 4 is inserted into the through hole 8 formed in the shaft center. The workpiece placement surface 2 is a flat surface that forms an annular shape on the upper end surface of the small-diameter cylindrical portion 3a.

  The locate pin 4 has a hemispherical tip portion 4a protruding upward from the workpiece placement surface 2, a pin body portion 4b having the tip portion 4a, and a large diameter integrated with the base end of the pin body portion 4b. And a flange portion 4c. This locating pin 4 is mounted on the fixed work cradle 7 by fastening means such as a bolt in a state where the flange part 4c is mounted on the upper end of the fixed work cradle 7 and overlapped with the mounting flange part 3b of the locating pin pressing member 3 described above. Fixed to.

  The locating pin 4 is formed with a storage portion 5 for inserting the clamp arm 6 into the inside thereof along the axial direction from the proximal flange portion 4c to the vicinity of the distal end portion 4a. Yes. Further, the pin main body portion 4b is formed with a slit 9 communicating with the storage portion 5 as an elongated groove along the axial direction on the outer peripheral surface thereof. The clamp arm 6 is configured such that both side surfaces in the thickness direction are guided by the inner wall surface of the storage portion 5, and can be moved up and down by a clamp arm driving means described later, and a claw portion 6 a at the tip thereof. Can be moved in and out from the slit 9.

The clamp arm 6 includes a claw portion 6a that clamps the work panel WP by pressing the work panel WP against the workpiece placement surface 2, a base end portion 6b that is coupled to the rod pin 10 that constitutes the clamp arm driving means, and the claw portions 6a. And a main body portion 6c that connects the base end portion 6b. The clamp arm 6 is a connecting pin 11 that fits the base end portion 6b into a slit (not shown) formed at the tip end portion of the rod pin 10 and penetrates the base end portion 6b and the rod pin 10 together. It is connected to the rod pin 10. When the rod pin 10 moves forward, the clamp arm 6 connected to the tip of the rod pin 10 moves forward (ascends) in the storage portion 5, and when the rod pin 10 moves backward, the clamp arm 6 moves backward (lowers) in the storage portion 5. To do.

  The main body 6c of the clamp arm 6 is formed with a cam groove 12 for allowing the work panel WP to move to an unclamping position, a clamping position, and a temporary holding position. The cam groove 12 includes a straight cam groove 12a, a curved cam groove 12b, and an inclined cam groove 12c from the proximal end side toward the distal end side. The cam groove 12 is inserted into and engaged with a cam pin 13 that is fixed so as to penetrate the cylindrical portion 7 b of the fixed work cradle 7.

  When the cam pin 13 fixed to the fixed work cradle 7 is in a position corresponding to the straight cam groove 12a in the cam groove 12, the clamp arm 6 is positioned at the tip of the locate pin 4 as shown by a two-dot chain line A in FIG. The claw portion 6a at the front end is submerged from the slit 9 into the storage portion 5. This state is the unclamping position of the clamp arm 6.

When the cam pin 13 is in a position corresponding to the curved cam groove 12b, the clamp arm 6 moves backward as shown by a two-dot chain line B in FIG. 2, and the claw portion 6a at the tip of the clamp arm 6 is moved to the workpiece placement surface 2a. On the other hand, a gap slightly wider than the thickness of the work panel WP (for example, a gap of about 3 to 5 mm) is opened. This state is a temporary holding position of the clamp arm 6. When the work panel WP is inserted into the locate pin 4 in this temporary holding position, the claw portion 6a is brought into contact with the claw portion 6a protruding from the slit 9 by the peripheral edge portion of the positioning hole H formed in the work panel WP. Temporarily sinks into the storage unit 5. This is because the clamp arm 6 rattles against the cam pin 13 by the amount of the curved cam groove 12b. Therefore, when the clamp arm 6 is pushed by the work panel WP, the cam pin 13 enters the curved cam groove 12b. The claw portion 6 a provided on the inside retracts into the storage portion 5.

  The clamp arm 6 is temporarily retracted from the slit 9 into the storage portion 5 by the claw portion 6a. However, the clamp arm 6 is attached to the leaf spring 14 of the arm urging means attached so as to be sandwiched between the locate pin pressing member 3 and the locate pin 4. When pressed, the claw portion 6a protrudes outward from the slit 9 again. Then, the clamp arm 6 is returned to the temporary holding position again.

  When the cam pin 12 is in a position corresponding to the inclined cam groove 12c, the clamp arm 6 is further retracted as shown by the solid line in FIG. 2, and the work panel WP is placed on the work panel by the claw portion 6a at the tip. The surface 2 is pressed. This state is the clamp position of the clamp arm 6. In FIG. 2, since the work panel WP is not provided, the claw portion 6 a is in direct contact with the work placement surface 2.

  The work detection means includes a detection rod 15 and a sensor plunger, a compression coil spring, a magnet, and a magnetic sensor switch (not shown). The detection rod 15 is formed of, for example, an elongated pin whose tip is a sphere, and is provided slidably with respect to the locate pin pressing member 3. The detection rod 15 is connected to a sensor plunger provided on the cylindrical portion 7b of the fixed workpiece cradle 7 via a connecting member. Further, a spring force is applied to the detection rod 15 so as to protrude upward from the workpiece placement surface 2 by a compression coil spring provided below the sensor plunger. A magnet is attached to the lower end of the sensor plunger, and a magnetic sensor switch that outputs a detection signal in response to the magnetic force of the magnet when the detection rod 15 is in the retracted position is provided with the fixed work cradle. 7 is fixed to the outside of the cylindrical portion.

  The clamp arm drive means includes a first drive cylinder 16, a second drive cylinder 17, and an air supply means for supplying air to the first drive cylinder 16 and the second drive cylinder 17. The first drive cylinder 16 and the second drive cylinder 17 are arranged in a vertically stacked state that is the axial direction of the locate pin 4. The first drive cylinder 16 is a clamp arm moving cylinder for moving the clamp arm 6 to an unclamping position and a clamping position. The second drive cylinder 17 is a clamp arm temporary holding positioning cylinder for positioning and holding the clamp arm 6 at the temporary holding position.

  A first piston 18 is provided in the first drive cylinder 16 so as to be movable in the cylinder chamber. A rod pin 10 in which the clamp arm 6 is connected by a connecting pin 11 is fixed to the first piston 18 with a screw 19. The cylinder chamber of the first drive cylinder 16 is partitioned into two chambers by the first piston 18, and the upper chamber of FIG. 3 is the first outlet port 20 and the lower chamber is the first return port 21.

  The second drive cylinder 17 is provided with a second piston 22 movably in the cylinder chamber. The cylinder chamber of the second drive cylinder 17 is partitioned into two upper and lower chambers by the second piston 22, and the upper chamber in FIG. 3 is the second return port 23 and the lower chamber is the second outlet port 24. Yes.

  Further, the partition wall 25 that partitions the first drive cylinder 16 and the second drive cylinder 17 is a through-hole for allowing the tip portion 22a of the second piston 22 to freely protrude and retract in the first return side port 21 of the first drive cylinder 16. 26 is formed. Further, the partition wall 25 is formed with a communication hole 27 as a small through hole that allows the first return side port 21 of the first drive cylinder 16 to communicate with the second return side port 23 of the second drive cylinder 17. ing.

  The air supply means supplies the air supplied from the air supply source 28 by switching between the return valve 29 and the outlet valve 30. In front of the air supply source 28, a filter 31 for removing foreign substances and oil in the air is provided. Further, a regulator 32 and a pressure gauge 33 for adjusting the air pressure supplied from the air supply source 28 are provided in front of the filter 31. The air supplied from the air supply source 28 is supplied to the first outlet port 20 of the first drive cylinder 16 through a branch path 35 that branches from the air supply path 34 before the two valves 29 and 30. A speed controller 37 that controls the flow rate of air entering the first outlet port 20 is provided in front of the outlet 36 that is blown out to the first outlet port 20.

  The air supplied from the air supply source 28 is supplied to the first return side port 21 of the first drive cylinder 16 via the first piston drive air supply path 38 by being switched by the return side valve 29. The A speed controller 40 that controls the flow rate of air entering the first return side port 21 is provided in front of the air outlet 39 that is blown out to the first return side port 21.

  The air supplied from the air supply source 28 is supplied to the second outlet port 24 of the second drive cylinder 17 via the second piston driving air supply path 41 by being switched by the outlet valve 30. The A speed controller 43 that controls the flow rate of air entering the second outlet port 24 is provided in front of the outlet 42 that is blown out to the second outlet port 24.

“Explanation of work panel clamping method”
Next, a method for clamping the work panel WP using the locate clamp device 1 configured as described above will be described. In the method according to the present embodiment, not only the clamp arm 6 is moved to two positions, the unclamping position and the clamping position, but also the work panel WP is set between the time when the work panel WP is set on the locate pin 4 and the time when the press switch is pressed. The clamp arm 6 is moved and held at the temporary holding position so that the work panel WP can be held so that the work panel WP does not float or fall over the work placement surface 2.

  First, before attaching the work panel WP to the locate pin 4, the locate pin 4 is held at the unclamping position shown in FIG. In order to hold the clamp arm 6 in the unclamping position, air is always supplied from the air supply source 28 to the first outlet port 20 of the first drive cylinder 16 as shown in FIG. The air is supplied to the first return side port 21 of the first drive cylinder 16 by switching to the return side valve 29 which is one of the valves.

  Then, a part of the air supplied into the first return side port 21 flows into the second return side port 23 of the second drive cylinder 17 through the communication hole 27. At this time, air of the same pressure is supplied to the first outlet side port 20 and the first return side port 21, but the lower surface side pressure receiving area of the first piston 18 is larger than the upper surface side pressure receiving area. The first piston 18 in the drive cylinder 16 rises to push up the rod pin 10. The pushed-up rod pin 10 moves the clamp arm 6 connected by the connection pin 11 to the unclamping position by moving up (moving toward the return side) along the cam groove 12 using the cam pin 13 as a guide. On the other hand, in the second piston 22 in the second drive cylinder 17, pressurized air is supplied to the second return side port 23 through the communication hole 27, and the second outlet port 24 opens the outlet valve 30. Since it is open to the atmosphere, it descends (moves to the return side). At the unclamping position, the claw portion 6 a formed at the distal end portion of the clamp arm 6 is a position where it is submerged in the locate pin 4.

  Next, the clamp arm 6 is moved from the unclamping position to the temporary holding position shown in FIG. In order to move the clamp arm 6 to the temporary holding position, the valve is switched from the return valve 29 to the outlet valve 30 and air is supplied to the second outlet port 24 of the second drive cylinder 17. By switching the valve, air supply to the first return side port 21 of the first drive cylinder 16 and the second return side port 23 of the second drive cylinder 17 is eliminated.

As a result, the second piston 22 in the second drive cylinder 17 is raised by the air supplied to the second outlet port 24. Further, since air is constantly supplied to the first outlet port 20 of the first drive cylinder 16, the first piston 18 descends and hits the tip of the second piston 22. Although air of the same pressure is supplied to the first outlet port 20 and the second outlet port 24, the lower pressure side pressure receiving area of the second piston 22 is larger than the upper pressure side pressure receiving area of the first piston 18. The upward thrust of the second piston 22 is larger than the downward thrust of the first piston 18. Therefore, the second piston 22 maintains its position against the first piston 18. The position where the first piston 18 abuts against the second piston 22 is the temporary holding position of the clamp arm 6. In the temporary holding position, the claw portion 6a formed at the tip of the clamp arm 6 by being pressed by the leaf spring 14 is projected outward from the slit 9, and the claw portion 6a is in contact with the workpiece placement surface 2. The gap is slightly wider than the thickness of the work panel WP. Since the first piston 18 is supported by the second piston 22 from below in this temporary holding position, the position does not shift. Thus, the preparation for temporarily holding the work panel WP between the claw portion 6a and the work placement surface 2 is completed.

  When the clamp arm 6 is completely positioned and held at the temporary holding position, the positioning hole H formed in the work panel WP is inserted into the locate pin 4. When the peripheral edge of the positioning hole H of the work panel WP hits the claw 6a of the clamp arm 6 protruding from the peripheral surface of the locating pin 4, the claw 6a is temporarily retracted into the slit 9 by the pushing force of the work panel WP. When the work panel WP passes the claw portion 6a, the claw portion 6a is pushed again by the urging force of the leaf spring 14 and jumps out of the outer peripheral surface of the locate pin 4. As a result, the work panel WP enters the gap between the claw portion 6a and the work placement surface 2 and is temporarily held. In the temporary holding position, even when the work panel WP pushes back the clamp arm 6, the clamp arm 6 does not retract into the slit 9 due to the shape of the arm.

  Further, when the work panel WP is positioned and held at the temporary holding position, a part of the work panel WP comes into contact with the detection rod 15. Then, when the detection rod 15 is pushed, it is determined that the work panel WP is attached to the locate clamp device 1.

  Next, the return valve 29 and the outlet valve 30 are both switched to the neutral position (the valve is turned off) to stop the air supply. Thereby, air supply to the first return side port 21 of the first drive cylinder 16 and the second return side port 23 of the second drive cylinder 17 is eliminated. Further, the air supply to the second outlet port 24 is also eliminated. Further, since the clamp arm 6 is constantly supplied with air to the first outlet port 20 of the first drive cylinder 16, the clamp arm 6 moves downward as the first piston 18 descends. As a result, the work panel WP is pressed and clamped against the work placing surface 2 by the claw portion 6 a formed at the tip of the clamp arm 6.

"Effect"
According to the locate clamp apparatus configured as described above, the clamp arm 6 is moved to the unclamping position and the clamping position by the first piston 18 of one of the two connected driving cylinders 16 and 17. Since the second piston 22 of the other drive cylinder 17 is brought into contact with the first piston 18 and the temporary holding position of the clamp arm 6 is positioned and held, the temporary holding state of the work panel WP is reliably held. It is possible to suppress the posture change of the work panel WP before clamping. Therefore, it becomes possible to clamp the work panel WP more accurately, and press work can be performed with high accuracy.

  Further, according to the locate clamp device of the present embodiment, since the first piston 18 connected to the clamp arm 6 is in contact with the second piston 22 and the temporary holding position of the clamp arm 6 is positioned and held, The operation from the unclamping position of the clamp arm 6 to the temporary holding position can be ensured, and the gap between the workpiece placement surface 2 and the claw portion 6a at the temporary holding position can be accurately obtained.

  Further, according to the locate clamp device of the present embodiment, the first return side port 21 of the first drive cylinder 16 and the second return side port 23 of the second drive cylinder 17 are communicated via the communication hole 27. By supplying air to the first return side port 21, air can also be supplied to the second return side port 23, and the air supply path can be simplified.

  Further, according to the locate clamp device of the present embodiment, the cam groove 12 for moving the clamp arm 6 to each of the clamp position, the temporary holding position, and the unclamping position is formed in the clamp arm 6, so that the pawl is held at the temporary holding position. It is possible to realize the operation of moving the portion 6a out of the locate pin 4.

  Further, according to the locate clamp device of the present embodiment, since the leaf spring 14 which is an arm biasing means for biasing the clamp arm 6 is provided, it is pushed by the work panel WP when the clamp arm 6 is in the temporary holding position. Even if the claw portion 6a is temporarily retracted into the slit 9, the clamp arm 6 is pushed by the urging force of the leaf spring 14 so that the claw portion 6a protrudes outward from the slit 9 again. The temporary holding position can be held without displacement.

  Further, according to the work panel clamping method of the present embodiment, not only the clamp arm 6 is unclamped and clamped, but also the claw portion 6a is slightly wider than the work placement surface 2 than the thickness of the work panel WP. The workpiece panel WP can be positioned and held by the clamp arm 6 moved to the temporary holding position because it is moved to the temporary holding position where the gap is opened. Accordingly, it is possible to prevent the work panel WP from being lifted or fallen from the time when the work panel WP is mounted to the locate clamp device 1 to the time when the work panel WP is clamped. As a result, it is possible to press the work panel WP with high accuracy.

  Further, according to the work panel clamping method of the present embodiment, when the clamp arm 6 is in the temporary holding position, the second drive cylinder 17 is operated and the second piston 22 is moved to the first piston 18 of the first drive cylinder 16. Since the temporary holding position of the clamp arm 6 is held in contact with the clamp arm 6, the gap between the claw portion 6a formed at the tip of the clamp arm 6 and the workpiece placement surface 2 can be maintained, and the work panel can be maintained. It is possible to prevent the WP from being lifted or fallen from the work placement surface 2.

  In addition, since the above-mentioned embodiment is only an example of this invention, this invention is not limited to the said embodiment.

  The present invention can be used for a locate clamp device for clamping a work panel.

DESCRIPTION OF SYMBOLS 1 ... Locating clamp apparatus 2 ... Workpiece mounting surface 3 ... Locating pin holding member 4 ... Locating pin 5 ... Storage part 6 ... Clamp arm 6a ... Claw part 9 ... Slit 10 ... Rod pin 12 ... Cam groove 14 ... Plate spring (arm biasing means) )
DESCRIPTION OF SYMBOLS 16 ... 1st drive cylinder 17 ... 2nd drive cylinder 18 ... 1st piston 20 ... 1st exit side port 21 ... 1st return side port 22 ... 2nd piston 23 ... 2nd return side port 24 ... 2nd exit side port 27 ... Communication hole 28 ... Air supply source 29 ... Return valve 30 ... Exit valve

Claims (5)

A locating pin that is inserted into a positioning hole formed in the work panel and places the peripheral portion of the positioning hole on a work placing surface to position the work panel;
A claw portion is housed in a storage portion formed in the axial center direction of the locating pin to the vicinity of the tip portion thereof, and can be moved in and out from a slit communicating with the storage portion on the outer peripheral surface of the locating pin. Clamp arm,
The clamp at the unclamping position in which the claw portion is stored in the internal storage portion from the slit, and the clamp position in which the claw portion protrudes outward from the slit and presses the work panel against the work placement surface. A clamp arm drive means for moving the arm, and a locate clamp device comprising:
The clamp arm driving means includes
A first drive cylinder having a first piston coupled to a proximal end of the clamp arm for moving the clamp arm to the unclamp position and the clamp position;
A second piston is provided that is connected to the first drive cylinder in the axial direction and is in contact with or not in contact with the first piston. The claw portion is brought into contact with the first piston so that the claw portion is the workpiece. A second drive cylinder for positioning and holding the clamp arm at a temporary holding position so that a gap wider than the thickness of the work panel is provided with respect to the mounting surface;
Wherein the first driving cylinder or the air supply means for operating said supplying air to the first drive cylinder and the second drive cylinder the first piston and second piston, Ri Tona,
The cylinder chamber of the first drive cylinder is reversely connected to the first return side port located on the second drive cylinder side by the first piston via the first piston 18. And a first outlet port located,
The locate clamp device is characterized in that air is constantly supplied from the air supply means to the first outlet port regardless of the clamp position . The locate clamp device according to claim 1,
Of the first outlet port and the first return port partitioned by the first piston movably provided in the cylinder chamber of the first drive cylinder, the first return port is the cylinder of the second drive cylinder. Of the second outlet port and the second return port partitioned by the second piston movably provided in the room, the second return port is connected to the second return port via a communication hole. Locate clamp device. The locate clamp device according to claim 1 or 2,
A locate groove device characterized in that a cam groove is formed on the clamp arm to move the clamp arm to a clamp position, a temporary holding position, and an unclamp position. The locate clamp device according to any one of claims 1 to 3,
Arm urging means for urging the clamp arm in contact with the clamp arm, and when the clamp arm is in the temporary holding position, the external force when the positioning hole formed in the work panel is inserted into the locate pin After the claw portion is temporarily retracted into the slit, it is pushed by the urging force of the arm urging means, and the claw portion protrudes outward from the slit again to hold the temporary holding position of the work panel. Locating clamp device. Inserting a locating pin into a positioning hole formed in the work panel, a clamp arm having a claw portion that can be moved in and out through a slit formed in the locating pin is movable in the axial direction within the locating pin, and the clamp arm To position the work panel by pressing the claw part against the work placement surface formed on the locating pin at the periphery of the positioning hole,
An unclamping position in which the claw portion is submerged in the locate pin from the slit, and a clamping position in which the claw portion protrudes outward from the slit and presses the work panel against the work placement surface with the claw portion; A work panel clamping method in which the clamp arm is moved to a temporary holding position where the claw portion is positioned with respect to the work placement surface so that a gap wider than the thickness of the work panel is provided. And
A first drive cylinder that moves the clamp arm to an unclamp position and a clamp position; and a first drive cylinder that is axially connected to the first drive cylinder and that contacts or does not contact the first piston of the first drive cylinder. A second drive cylinder having two pistons, and an air supply means for operating the first piston and the second piston by supplying air to the first drive cylinder or the first drive cylinder and the second drive cylinder. A clamp arm driving means having
The cylinder chamber of the first drive cylinder is reversely connected to the first return side port located on the second drive cylinder side by the first piston via the first piston 18. And a first outlet port located,
Regardless of the clamp position, air is always supplied from the air supply means to the first outlet port,
When the clamp arm is in the temporary holding position, the second driving cylinder is operated to bring the second piston into contact with the first piston to hold the temporary holding position of the clamp arm. Panel clamping method.

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