JP5163447B2 - Work positioning device - Google Patents

Description

  The present invention relates to a workpiece positioning device for positioning a workpiece at a predetermined position.

  2. Description of the Related Art Conventionally, for example, when a workpiece (for example, a panel member or the like) that is a component part of an automobile or the like is welded, a workpiece positioning device for positioning the workpiece at a predetermined position is used. Such a workpiece positioning device includes, for example, a locate pin that fits into a locate hole of the workpiece, and a clamp arm that can clamp the workpiece positioned via the locate pin, and fits the locate pin into the locate hole. Thus, the workpiece is positioned, the clamp arm is protruded from the slit provided in the locate hole, and the workpiece is held between the workpiece receiving portion and the clamp arm.

  Further, when a workpiece positioned by the locate pin is taken out, the push-out rod of the pusher connected to the push-out piston is displaced by displacing the push-out piston provided in the cylinder body upward under the action of supplying the pressure fluid. The material protrudes from the workpiece receiving portion and pushes the lower surface of the workpiece upward (see, for example, Patent Document 1).

JP 2008-229777 A

  However, in the prior art according to Patent Document 1, when a workpiece is taken out, a plurality of extruded rod members constituting the extrusion tool are pushed out in contact with the workpiece, so that the extruded rod formed in this rod shape. Since the material has a limited area in contact with the workpiece, it is difficult to stably and horizontally extrude the workpiece along the locating pin, which may cause deformation of the workpiece.

  Furthermore, when the difference between the outer diameter of the locate pin and the diameter of the locate hole is set small in order to increase the positioning accuracy of the workpiece, for example, when positioning and welding the workpiece, the workpiece is distorted and the locate pin The problem that it cannot be removed may arise. Furthermore, there is a concern that when the workpiece is forcibly removed from the positioning device in such a state, the workpiece may be deformed or the positioning device may be defective.

  The present invention has been made in consideration of the above-described problems, and an object of the present invention is to provide a workpiece positioning device that can reliably and stably take out a positioned workpiece with a simple configuration.

In order to achieve the above object, the present invention provides a main body having a first holding surface on which a workpiece is held;
A drive unit coupled to the main body part and having a displacement rod which is displaceable along the axial direction of the main body part;
A positioning pin that is provided in the main body and through which a positioning hole provided in the workpiece is inserted;
An extruding mechanism that pushes upward the work held on the first holding surface under the driving action of the driving unit;
With
The push-out mechanism has an annular second holding surface that comes into contact with the workpiece, and includes a push-out body that is connected to the displacement rod and is displaceable along an axial direction.

  According to the present invention, the positioning pin through which the positioning hole of the workpiece is inserted is provided in the main body portion, and the workpiece held on the first holding surface of the main body portion is moved upward by the pushing mechanism under the driving action of the driving portion. And extrude. This push-out mechanism has a push-out body connected to a displacement rod that constitutes a drive unit, and a second holding surface formed in an annular shape is brought into contact with the work and can be taken out by being pushed upward.

  Therefore, the workpiece can be easily positioned by inserting the positioning hole of the workpiece into the positioning pin, and the extruded body is connected to the displacement rod constituting the driving unit and displaced along the axial direction. Since the workpiece can be pushed upward by the annular second holding surface, the workpiece can be stably taken out with a simple configuration without being deformed.

Further, the positioning pin is formed in a shaft shape, and a positioning portion having the same diameter;
A taper portion formed above the positioning portion and gradually tapered toward the top;
With
The diameter of the positioning portion may be set to be substantially the same as the diameter of the positioning hole.

  As a result, the workpiece positioning hole is inserted into the positioning portion, whereby the workpiece is positioned with high accuracy by the workpiece positioning device, and when the workpiece is pushed upward by the push-out mechanism, The workpiece can be easily taken out by a tapered portion formed in a tapered shape.

  Further, the extruded body is formed in a cylindrical shape and guided in the axial direction along the guide surface provided in the main body portion, so that the extruded body is held in the vertical direction (the workpiece is held by the second holding surface ( It is possible to reliably move along the axial direction), and the workpiece can be taken out from the positioning pin in a stable state.

  Furthermore, the push-out mechanism is arranged so that the positioning hole faces the tapered portion when the workpiece is pushed upward, so that the clearance between the positioning hole and the tapered portion becomes a clearance with respect to the positioning portion. Therefore, the workpiece can be easily taken out from the positioning pin. In other words, the positioning hole can be easily taken out without being set large in advance with respect to the positioning portion.

  Still further, by providing a detection mechanism for detecting the displacement position along the axial direction of the extruded body, the position of the extruded body is detected by the detection mechanism, and the workpiece is held on the first holding surface. It is possible to easily confirm whether or not the extruded body is pushed out by the extruded body.

  Further, by providing a clamp mechanism capable of holding the workpiece, the workpiece positioned by the positioning pin can be reliably held.

  According to the present invention, the following effects can be obtained.

  That is, the extrusion mechanism has an extrusion body connected to a displacement rod that constitutes the drive unit, and the work held by the first holding surface of the main body part and the second holding surface of the extrusion body is driven by the drive unit. Since the workpiece can be pushed upward downward, the workpiece can be taken out from the positioning pin with a simple configuration, and the workpiece can be stably taken out without being deformed by the second holding surface formed in an annular shape. It becomes possible.

  A preferred embodiment of a workpiece positioning apparatus according to the present invention will be described below and described in detail with reference to the accompanying drawings.

  In FIG. 1, reference numeral 10 indicates a workpiece positioning apparatus according to the first embodiment of the present invention.

  As shown in FIGS. 1 to 3, the workpiece positioning device 10 is fixed to the cylinder portion (drive portion) 12, a housing (main body portion) 14 connected to the upper portion of the cylinder portion 12, and the housing 14. And a positioning pin 16 that can position the workpiece W, and an extrusion mechanism 18 that pushes the workpiece W positioned on the positioning pin 16 upward (in the direction of arrow A) under the driving action of the cylinder portion 12. In addition, the workpiece | work W hold | maintained with this workpiece | work positioning device is a panel for motor vehicles consisting of a board | plate material, for example, It is used for the manufacturing line which hold | maintains this motor vehicle panel and performs a welding operation.

  The cylinder portion 12 includes a bottomed cylindrical cylinder tube 20, a piston 22 provided inside the cylinder tube 20 so as to be displaceable, a piston rod (displacement rod) 24 connected to the piston 22, and the cylinder tube 20 includes a rod cover 26 that closes the end of 20 and supports the piston rod 24.

  The cylinder tube 20 has an open upper end connected to an end plate 28 constituting the housing 14, and a cylinder hole 30 is formed in the cylinder tube 20 along the axial direction (directions of arrows A and B). Further, first and second ports 32 and 34 through which pressure fluid is supplied and discharged are formed on the side surface of the cylinder tube 20, and are provided apart from each other along the axial direction of the cylinder tube 20 by a predetermined distance. The first and second ports 32 and 34 communicate with the cylinder hole 30 through the communication path 36, respectively. That is, the pressure fluid supplied to the first and second ports 32 and 34 is introduced into the cylinder hole 30 through the communication path 36.

  The piston 22 is provided so as to be displaceable along the cylinder hole 30, and a piston packing 38 and a magnet 40 are attached to the outer peripheral surface of the piston 22 via an annular groove. Moreover, a hole penetrates the central portion of the piston 22, and one end of a long piston rod 24 is inserted and connected.

  The piston rod 24 extends to the upper end side (in the direction of arrow A) of the cylinder tube 20 with a predetermined length, and is inserted into and supported by the rod hole 42 of the rod cover 26. The end is inserted into the through hole 46 a of the end plate 28. An annular rod packing 48 and a bush 50 are attached to the rod hole 42. The rod packing 48 is in sliding contact with the outer peripheral surface of the piston rod 24, whereby the airtightness of the cylinder hole 30 is maintained. The piston rod 24 is supported so as to be displaceable along the axial direction.

  On the other hand, a connecting rod 54 constituting the extrusion mechanism 18 is screwed to and integrally connected to the other end portion of the piston rod 24 through a screw hole 52 provided in the center portion.

  The rod cover 26 is inserted into the cylinder hole 30 at the upper end of the cylinder tube 20 and is fixed by a locking ring 56 engaged with the inner peripheral surface of the cylinder hole 30.

  The housing 14 includes an end plate 28 attached to the upper end portion of the cylinder tube 20, an adapter 58 attached to the upper portion of the end plate 28, and a first sheet that holds the workpiece W and is provided on the upper portion of the adapter 58. And a cover member 60 having a surface (first holding surface) 72. Through holes 46a and 46b through which the piston rod 24 and the connecting rod 54 are inserted are formed in the center portions of the end plate 28 and the adapter 58, respectively.

  The cover member 60 includes a cylindrical portion 62 formed in a cylindrical shape and a flange portion 64 formed at the lower end portion of the cylindrical portion 62, and the flange portion 64 is provided on the upper portion of the adapter 58 and includes a plurality of bolts. 44 is connected to the cylinder tube 20 together with the adapter 58 and the end plate 28. In addition, the cylinder part 12, the end plate 28, the adapter 58, and the cover member 60 are arrange | positioned so that it may become coaxial.

  A positioning pin 16 and a moving body (extrusion body) 66 are provided inside the cylindrical portion 62, and a first opening 68 through which the positioning pin 16 and the moving body 66 can be inserted is formed at the upper end portion. The first opening 68 bulges radially inward with respect to the inner peripheral surface of the cylindrical portion 62, and a stepped portion 70 is formed at the boundary between the first opening 68 and the inner peripheral surface.

  Further, a first sheet surface 72 that is formed in a planar shape orthogonal to the axis of the cover member 60 and that contacts the workpiece W is provided on the upper end surface of the cylindrical portion 62. That is, the first sheet surface 72 is formed in an annular shape with the first opening 68 opened at the center thereof.

  The first opening 68 is formed with a predetermined depth from the first sheet surface 72 downward, and has the same inner diameter. The inner peripheral surface of the first opening 68 functions as a guide surface capable of guiding displacement along the axial direction (arrows A and B directions) of the moving body 66 provided therein.

  The positioning pin 16 is provided inside the cover member 60 and is fixed to the housing 14. The locating part (positioning part) 76 extends perpendicularly to the flange part 74 and extends upward. It includes a tapered portion (tapered portion) 78 that extends further upward from the upper end of the locating portion 76. The annular flange 74 is fixed to the housing 14 by being sandwiched between the cover member 60 and the adapter 58, and the tapered portion 78 is formed in the first opening 68 of the cover member 60. Projecting upward by a predetermined height.

  The locate portion 76 includes a large-diameter portion 80 joined to the upper portion of the flange portion 74 and a small-diameter portion 82 formed at the upper portion of the large-diameter portion 80 and having a diameter reduced radially inward. The small diameter portions 82 are formed with different diameters.

  An insertion groove 84 into which the connecting rod 54 is inserted is formed in the large diameter portion 80 from below to above. The insertion groove 84 extends for a predetermined length along the axial direction of the positioning pin 16 and penetrates in a direction orthogonal to the axial line. That is, the insertion groove 84 is formed in a slit shape with respect to the large diameter portion 80.

  The small-diameter portion 82 is formed with a substantially same diameter as the positioning hole Wh provided in the workpiece W and with a predetermined length along the axial direction (arrows A and B directions). It is provided so as to contact the portion 104. When the positioning hole Wh of the workpiece W is inserted into the small diameter portion 82, the movement of the positioning hole Wh formed with the substantially same diameter as the outer peripheral diameter of the small diameter portion 82 is restricted, and the workpiece W is attached to the positioning pin 16. Positioned against.

  The tapered portion 78 is joined to the small-diameter portion 82 in the locate portion 76 and is formed so as to gradually reduce the diameter toward the tip with respect to the small-diameter portion 82 having substantially the same diameter, and the tip portion is formed in a hemispherical shape. Has been.

  The extruding mechanism 18 is a connecting rod 54 connected to the piston rod 24 of the cylinder portion 12 and a cylindrical moving body provided outside the connecting rod 54 and the positioning pin 16 so as to be displaceable along the axial direction. 66, and a connecting pin 96 that connects the connecting rod 54 and the moving body 66.

  The connecting rod 54 includes a base portion 86 formed in a disk shape, a screw portion 88 provided at a lower portion of the base portion 86 and screwed into the screw hole 52 of the piston rod 24, and an upper portion of the base portion 86. The insertion portion 90 is provided and inserted into the insertion groove 84 of the positioning pin 16.

  The base portion 86 contacts the upper end portion of the piston rod 24 when the screw portion 88 is screwed to the piston rod 24. The insertion portion 90 is formed in a substantially rectangular shape with both sides formed in an arc shape, and a first pin hole 92 is formed so as to penetrate between the both sides. When the insertion portion 90 is inserted into the insertion groove 84, the insertion portion 90 is inserted so that both side portions where the first pin holes 92 are open are on the side where the insertion groove 84 is open. That is, since the insertion portion 90 is formed in a substantially rectangular cross section and the insertion groove 84 is also formed in a corresponding cross sectional shape, the insertion portion 90 can rotate relative to the positioning pin 16. Is prevented.

  The moving body 66 is formed on the lower side, and is connected to the connecting rod 54 via a connecting pin 96 inserted into the second pin hole 94. And a bulging portion 102 having a second sheet surface (second holding surface) 100 that abuts against the workpiece W. The second sheet surface 100 is formed in a flat shape so as to be orthogonal to the axis of the moving body 66.

  Further, a second opening 104 through which the positioning pin 16 is inserted is opened at the center of the bulging portion 102, and the inner peripheral surface of the second opening 104 is the outer peripheral surface of the small diameter portion 82 of the positioning pin 16. It is provided in sliding contact.

  The workpiece positioning apparatus 10 according to the first embodiment of the present invention is basically configured as described above. Next, the operation and effects thereof will be described. Here, as shown in FIGS. 1 and 3, the moving body 66 constituting the extrusion mechanism 18 moves downward (in the direction of arrow B), and the second sheet surface 100 is the first of the cover member 60. A state in which the sheet surface 72 is substantially flush with the sheet surface 72 will be described as an initial state. In this initial state, pressure fluid is supplied from a pressure fluid supply source (not shown) to the first port 32, and the piston 22 is separated from the extrusion mechanism 18 by the pressure fluid introduced into the cylinder hole 30 through the communication path 36. Since it is pressed in the direction (arrow B direction), the connecting rod 54 and the moving body 66 are displaced downward via the piston rod 24, and the second sheet surface 100 is the first sheet surface 72 of the cover member 60. And substantially the same plane.

  First, in this initial state, the workpiece W (for example, an automobile panel) is transported by a transport means (not shown), and placed so that the positioning hole Wh is inserted through the positioning pin 16. Thereby, the lower surface of the workpiece W is held in contact with the first sheet surface 72 and the second sheet surface 100 of the workpiece positioning mechanism, and the positioning hole Wh is inserted into the locating portion 76 of the positioning pin 16 ( 3 and 4). At this time, the outer peripheral diameter of the locating portion 76 is set to be substantially equal to or slightly smaller than the diameter of the positioning hole Wh, so that the positioning hole Wh is inserted into the locating portion 76 so that the work piece is inserted. W is positioned with high accuracy. In addition, since the positioning pin 16 has a tapered detail 78 that tapers upward, there is an advantage that it is easy to insert the positioning hole Wh from above.

  Thus, for example, the work such as welding is performed on the workpiece W positioned at a predetermined position in the production line or the like.

  Next, after the predetermined work for such a work W is completed, the positioning state of the work W is released, and the work W is transported to another work place on a production line or the like by a transport device (not shown).

  In this case, first, the pressure fluid supplied to the first port 32 under the switching action of a switching mechanism (not shown) is supplied to the second port 34 and the first port 32 is opened to the atmosphere. Accordingly, the piston 22 is pressed upward (in the direction of arrow A) by the pressure fluid introduced into the cylinder hole 30 below the piston 22, and accordingly, the piston rod 24 and the connecting rod 54 are displaced upward. . As a result, the moving body 66 connected to the connecting rod 54 via the pin moves upward along the first opening 68 of the cover member 60, and the second sheet surface 100 is the first sheet of the cover member 60. Projecting upward with respect to the surface 72.

  As a result, the lower surface of the workpiece W is pressed upward by the moving body 66, and gradually lifts upward from the state where it is in contact with the first and second sheet surfaces 100 and positioned by the locating portion 76 of the positioning pin 16. It is done. In this case, the second sheet surface 100 is a horizontal plane orthogonal to the displacement direction of the moving body 66, and the moving body 66 is displaced along the axial direction under the guide action of the guide surface. The workpiece W is displaced upward while being held in a horizontal state by the two sheet surfaces 100, and is moved to a position where the positioning hole Wh of the workpiece W faces the tip 78 of the positioning pin 16. That is, since the tapered portion 78 is formed smaller than the inner peripheral diameter of the positioning hole Wh, a clearance of a predetermined interval is provided between the inner peripheral surface of the positioning hole Wh and the tapered portion 78. .

  The moving body 66 stops when the diameter-enlarged portion 98 provided below contacts the stepped portion 70 provided inside the cover member 60, so that the upward displacement of the moving body 66 is restricted. That is, the stepped portion 70 provided on the cover member 60 functions as a stopper that controls the amount of upward movement of the workpiece W by the moving body 66.

  Finally, the workpiece W, which has been pushed upward by a predetermined height by the pushing mechanism 18 and released from the positioning state by the positioning pin 16, is gripped by a transport means (not shown) and transported upward, and the positioning hole Wh is passed through the positioning hole Wh. After being detached from the positioning pin 16, it is transported to a work place on the production line. At this time, since the positioning hole Wh is inserted through the tapered portion 78 of the positioning pin 16 with a clearance in the radial direction, the workpiece W can be smoothly taken out from the workpiece positioning device 10 by the conveying means.

  As described above, in the workpiece positioning apparatus 10 according to the first embodiment, the positioning pins 16 are formed with substantially the same diameter, and the locate portion 76 that can position the workpiece W through the positioning hole Wh, and the locate After the workpiece W is positioned by being formed from a tapered portion 78 formed above the portion 76 and gradually tapering with respect to the diameter of the locating portion 76, the extrusion mechanism 18 moves the workpiece W. By pushing out to the position (height) of the tapered portion 78, it is possible to provide a radial clearance between the tapered portion 78 formed with a smaller diameter than the positioning hole Wh.

  In other words, the workpiece W pushed upward by the push-out mechanism 18 is completely released from the positioning state of the positioning pin 16 by the locating portion 76, and can be moved slightly in the horizontal direction via the clearance. As a result, when the work W is transported by a transport means (not shown), the work positioning device 10 can be reliably and simply taken out and transported. In other words, when the workpiece W is taken out from the positioning device 10, it can be smoothly pushed out without being deformed via the annular second sheet surface 100.

  Further, when the workpiece W is positioned by the positioning device 10, when the workpiece W is lowered from above and the positioning hole Wh is inserted into the positioning pin 16, a tip provided at the tip of the positioning pin 16 is provided. Since 78 is formed so as to gradually taper upward, it is easy to position by inserting from the tip.

  Furthermore, when taking out the workpiece W from the positioning device 10, it is possible to smoothly push out and remove the workpiece W through the second sheet surface 100 of the movable body 66 formed in an annular shape without deformation.

  Furthermore, when the moving body 66 is displaced upward under the driving action of the cylinder portion 12, the outer peripheral surface abuts on the inner peripheral surface of the first opening 68 of the cover member 60, and the second opening By abutting 104 on the outer peripheral surface of the locating portion 76 of the positioning pin 16, it is reliably guided in the axial direction. As a result, the movable body 66 can push the workpiece W upward while maintaining the second sheet surface 100 provided on the upper portion in a substantially horizontal state.

  In addition, it is good also as a structure which can provide the clamp mechanism (not shown) which can hold | maintain the workpiece | work W with respect to the workpiece | work positioning apparatus 10 mentioned above, and can hold | maintain the workpiece | work W positioned by the positioning pin 16. FIG. Thus, for example, when work such as welding is performed on the positioned workpiece W, the work can be performed in a state where the workpiece W is securely held.

  Next, a workpiece positioning device 150 according to a second embodiment is shown in FIGS. The same components as those of the workpiece positioning apparatus 10 according to the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the workpiece positioning device 150 according to the second embodiment, a first detection mechanism 152 capable of detecting whether or not the workpiece W is positioned with respect to the positioning pin 16 is provided. This is different from the workpiece positioning device 10 according to the embodiment.

  In the workpiece positioning device 150, a space portion 156 is provided inside the cover member 154, and a detection sensor 158 constituting the detection mechanism 152 is provided on the upper surface of the space portion 156. For example, the detection sensor 158 includes a magnetic sensor capable of detecting a magnetic change. On the other hand, a detector 160 that is formed in an L-shaped cross section and protrudes into the space 156 from the side surface is provided on the side surface of the moving body 66. The detector 160 is made of, for example, a metal material, and is provided so as to protrude in the horizontal direction to a position facing the detection sensor 158.

  In other words, the distance L between the detector 160 and the detection sensor 158 changes when the detector 160 is displaced along the axial direction (the directions of the arrows A and B) together with the moving body 66. The operating state (operating position) of the extrusion mechanism 18 including the moving body 66 can be detected from the change in the magnetic field that changes according to the change. Specifically, as shown in FIG. 7, when the workpiece W is positioned by the positioning pin 16, the detector 160 is positioned downward together with the moving body 66, so that the detector 160, the detection sensor 158, The separation distance L is large.

  On the other hand, as shown in FIG. 8, in a positioning release state in which the movable body 66 is displaced upward and the workpiece W is pushed upward by the movable body 66, the detector 160 moves upward. Since the detector 160 and the detection sensor 158 approach each other and the separation distance L decreases, the movable body 66 is displaced upward due to a change in the magnetic field, and the workpiece W is pushed out of the positioning state. Can be confirmed.

  The workpiece positioning device 150 according to the second embodiment described above includes the moving body 66 by detecting the displacement position along the axial direction (arrows A and B directions) of the moving body 66 by the detection mechanism 152. It is possible to confirm whether the workpiece W is positioned with respect to the positioning pins 16 by the push-out mechanism 18 or whether the workpiece W can be taken out from the workpiece positioning device 150. As a result, for example, the detection mechanism 152 detects that the positioning of the workpiece W has been released, and the detection signal is output to a controller (not shown) to drive the conveying means to carry the workpiece W. Good.

  Further, instead of the detection mechanism 152, a detection mechanism (for example, a magnetic sensor) that detects the magnetism of the magnet 40 provided on the outer periphery of the piston 22 is provided, and the stroke position of the piston 22 is detected by the detection mechanism. The workpiece W may be in a state where it is positioned with respect to the positioning pins 16 or in a state where the workpiece W can be taken out from the workpiece positioning device 150. In this case, since the magnet 40 previously provided on the piston 22 can be used, it is not necessary to provide the detector 160, and simplification of the workpiece positioning device 150 can be further promoted.

  In addition, the workpiece positioning device according to the present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention.

1 is an external perspective view of a workpiece positioning device according to a first embodiment of the present invention. It is a disassembled perspective view of the housing and extrusion mechanism in the workpiece | work positioning device shown in FIG. It is whole sectional drawing of the workpiece | work positioning apparatus shown in FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. FIG. 4 is an overall cross-sectional view showing a state in which the work is pushed upward in the work positioning apparatus of FIG. 3. FIG. 6 is an enlarged cross-sectional view showing the vicinity of the tip of the positioning pin in FIG. 5. It is a whole sectional view of a work positioning device concerning a 2nd embodiment of the present invention. FIG. 8 is an overall cross-sectional view showing a state in which the work is pushed upward in the work positioning apparatus of FIG. 7.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,150 ... Work positioning device 12 ... Cylinder part 14 ... Housing 16 ... Positioning pin 18 ... Extrusion mechanism 22 ... Piston 24 ... Piston rod 26 ... Rod cover 28 ... End plate 54 ... Connecting rod 58 ... Adapter 60, 154 ... Cover member 66 ... moving body 68 ... 1st opening part 70 ... step part 72 ... 1st sheet surface 76 ... locate part 78 ... taper part 84 ... insertion groove 86 ... base part 90 ... insertion part 96 ... connecting pin 100 ... 2nd sheet surface 104 ... second opening 152 ... detection mechanism 158 ... detection sensor 160 ... detector

Claims (5)

A main body having a first holding surface on which a workpiece is held;
A drive unit coupled to the main body part and having a displacement rod which is displaceable along the axial direction of the main body part;
A positioning pin provided in the main body and inserted into a positioning hole provided in the workpiece;
An extruding mechanism that pushes upward the work held on the first holding surface under the driving action of the driving unit;
A detection mechanism for detecting a displacement position along the axial direction of the extrusion mechanism;
With
The positioning pin is formed in an axial shape and has a positioning portion having the same diameter;
A taper portion formed above the positioning portion and gradually tapered toward the top;
With
The diameter of the positioning portion is set to be substantially the same as the diameter of the positioning hole;
Wherein the positioning portion is provided with an insertion hole downward extending open axially,
The extrusion mechanism is arranged so that the positioning hole faces the tapered portion when the work is pushed upward.
The push-out mechanism has an annular second holding surface that comes into contact with the workpiece, and is connected to the displacement rod and is capable of being displaced along the axial direction.
A connecting pin for connecting the extruded body and the displacement rod coaxially through the insertion groove ;
With
The extrudate is formed in a cylindrical shape and guided in the axial direction along a guide surface provided in the main body,
The workpiece detection device, wherein the detection mechanism detects a displacement position along an axial direction of the extruded body. The apparatus of claim 1.
The work positioning apparatus, wherein the insertion groove penetrates in a direction orthogonal to the axis of the positioning portion. The apparatus according to claim 1 or 2,
The push-out mechanism further includes a connecting rod that is connected to the tip of the displacement rod and inserted into the insertion groove ,
And wherein the pre-Symbol connecting pin is inserted through the second through hole provided in the first through-hole and the extrusion member provided on the connecting rod, the displacement rod and the push-out mechanism is connected Work positioning device. The apparatus of claim 3.
The connecting rod includes an insertion portion that is inserted into the insertion groove ,
The workpiece positioning device, wherein the insertion portion is formed in a shape corresponding to a cross-sectional shape of the insertion groove . The apparatus of claim 4.
2. The workpiece positioning device according to claim 1, wherein the insertion portion is formed in a rectangular cross section in which both side portions are formed in an arc shape.

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