JP2013082036A - Work positioning device and work positioning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the accuracy of positioning a work, and to improve simplification and endurance the reliability of a device by providing a guide means which guides a base end of a positioning pin so that an axis of a cylinder and an axis of the positioning pin coincide with each other when the positioning pin retracts into the cylinder by pressure in an axial direction.SOLUTION: A work positioning device is provided with a palette 2 on which an engine 1 is mounted the positioning pin 7 of which a tip end guide 72 is inserted in a positioning hole 55 on a vehicle body 5 side, the cylinder 8 which is fixed on the palette 2 and supports the positioning pin 7 along a first axis CL1 of the positioning pin 7 in a movable manner in back and forth direction, an energizing means 10 which is energized with the positioning pin 7 in the advancing direction, and the guide means which guides the positioning pin 7 so that a second axis CL2 and the first axis CL1 coincide with each other when the positioning pin 7 retracts into the cylinder 8.

Description

  The present invention relates to a workpiece positioning apparatus and a workpiece positioning method for positioning by inserting a positioning pin into a positioning hole formed in a workpiece.

  In general, in the assembly process of an automobile, it is necessary to position the vehicle body part and the vehicle body during assembly work for assembling the vehicle body part to the vehicle body or the like. At this time, a positioning pin is inserted into a positioning hole formed in the vehicle body. Positioning.

Based on FIGS. 6A and 6B, an example of the prior art relating to positioning between the pallet 01 and the mounted member 05 when the workpiece mounted on the pallet 01 is mounted on the mounted member 05 will be described.
A positioning pin 03 is fitted in a cylinder 02 fixed to the pallet 01 so as to be able to advance and retract in the axial direction of the positioning pin 03.
A distal end portion of the positioning pin 03 is formed with a conical projection portion 031, and a pressure receiving portion 032 that slides on the inner peripheral surface of the cylinder 02 is formed at the proximal end portion of the positioning pin 03.
An air supply pipe 07 that supplies compressed air is provided at the bottom of the cylinder 02.
A pallet displacement device 08 that moves the pallet 01 up and down is disposed below the pallet 01.

The pallet 01 on which the workpiece is mounted at the regular position is installed at a position facing the attachment member 05, compressed air is supplied from the air supply pipe 07 into the cylinder, and the positioning pin 03 is advanced from the cylinder 02.
The pallet 01 is raised by the pallet displacement device 08. As the pallet 01 is raised, the protrusion 031 of the positioning pin 03 is fitted into the positioning hole 051 provided in the attached member 05. At this time, the center of the tip of the protrusion 031 and the axis of the positioning hole 051 often do not coincide.
As the pallet 01 rises, the protrusion 031 passes through the positioning hole 051 so as to follow the periphery of the positioning hole 051.
When the protruding portion 031 comes into contact with the stopper member 052 of the attached member 05, the positioning pin 03 is relatively retracted into the cylinder 02. Further, when the pressure receiving portion 032 of the positioning pin 03 reaches the bottom of the cylinder 02, the pressure of the working fluid of the pallet displacement device 08 increases,
The raising of the pallet displacement device 08 is stopped and the positioning is completed.

  Japanese Patent Laying-Open No. 2005-230877 (Patent Document 1) has a positioning rotation pin that is inserted into a positioning hole formed in a workpiece supported by a rotation rotation support portion, and the rotation rotation support portion is a tip of the positioning pin. Disclosed is a technique for a workpiece positioning device that displaces between an intermediate holding state in which the side can swing and rotate at a predetermined angle and a fixed holding state that restricts the swinging and rotating operation of the positioning pin when the positioning pin is completely inserted into the positioning hole. Has been.

Japanese Patent Laying-Open No. 2005-230877

  However, in an example of the prior art, as shown in FIG. 5B, the positioning hole 051 of the mounted member 05 is positioned so that the conical protrusion 031 of the positioning pin 03 follows the peripheral edge of the positioning hole 051. Since the hole 051 is penetrated, positioning is performed in a state where the first axis CL1 of the positioning pin 03 is inclined with respect to the second axis CL2 of the cylinder 02, positioning accuracy is low, and the inner peripheral surface 021 of the cylinder 02 A contact portion P (FIG. 6B) is generated between the pressure receiving portion 032 and the positioning accuracy is deteriorated due to wear of the contact portion P, and the positioning device is deteriorated.

  In addition, Patent Document 1 discloses an intermediate holding state in which the tip side of the swing rotation support portion and the positioning pin can swing and rotate by a predetermined angle, and a swing rotation operation of the positioning pin when the positioning pin is completely inserted into the positioning hole. Therefore, there is a problem that the apparatus becomes complicated and large in size and high in cost because a workpiece positioning device or the like that is displaced to a fixed holding state that restricts the movement is necessary.

  In view of the problems of the prior art, the present invention guides the proximal end portion of the positioning pin so that when the positioning pin is retracted into the cylinder by the axial pressing force, the axis of the cylinder and the axis of the positioning pin coincide with each other. It is an object of the present invention to provide guide means for improving the positioning accuracy of the workpiece and simplifying the apparatus and improving the durability reliability.

In order to achieve such an object, the present invention includes a pallet on which a workpiece is mounted,
A positioning pin that fits into a positioning hole of a member to be attached to which the tip is attached;
A cylinder that is fixed to the pallet, internally fits the positioning pin, and supports the positioning pin so as to advance and retreat;
Urging means for urging the positioning pin in the advance direction in the cylinder;
And a guide means for guiding the base end portion of the positioning pin so that the axis of the positioning pin coincides with the axis of the cylinder when the positioning pin is retracted into the cylinder. .

  With this configuration, when the tip of the positioning pin is inserted into the positioning hole of the workpiece and retracted into the cylinder by the pressing force in the axial direction of the positioning pin, the axis of the cylinder and the axis of the positioning pin are Since the guide means for guiding the base end portion of the positioning pin so as to coincide with each other, the final positioning is performed by the guide means when most of the positioning pin is retracted inside the cylinder. Can be prevented from occurring.

  In the present invention, it is preferable that the guide means is composed of a conical protrusion formed at a base end portion of the positioning pin and a conical recess facing the protrusion.

  As described above, since the base end portion of the positioning pin is a conical protrusion and the shape of the guide portion is a conical concave portion, the axial force of the positioning pin and the axis of the positioning pin are Can be easily aligned, and the structure is simple and the durability and reliability are improved.

  In the present invention, it is preferable that the urging means is constituted by a flange disposed at an intermediate portion in the axial direction of the positioning pin and a coil spring interposed between the guide means.

  Thus, since the urging force as the urging means is a coil spring, the structure is simplified and the manufacturing cost of the equipment can be reduced.

  In the present invention, it is preferable that the urging means is performed by compressed air supplied between a flange portion disposed at an intermediate portion in the axial direction of the positioning pin and the guide means.

  Since the positioning pin is moved by compressed air in this way, it can respond to changes in the height direction between the workpiece and the mounted member, i.e., the positioning pin can be moved regardless of whether the height is small or large. Can move reliably. For this reason, versatility increases.

  In the invention relating to the workpiece positioning method, in the workpiece positioning method for positioning the workpiece mounted on the pallet with the mounted member to which the workpiece is mounted, the pallet mounted with the workpiece is installed at the mounted member position. A step of displacing the pallet upward, and a tip of a positioning pin disposed in a cylinder fixed to the pallet so as to be capable of advancing and retreating and being biased in the advancing direction. A step of fitting into the positioning hole provided, and the rising of the positioning pin is stopped, the positioning pin is relatively retracted in the cylinder against the bias, and the base end portion of the positioning pin is And holding the guide means for guiding so as to align the axis of the positioning pin with the axis of the cylinder.

  According to this invention, when the distal end portion of the positioning pin is inserted into the positioning hole of the workpiece and is retracted into the cylinder by the pressing force in the axial direction of the positioning pin, the guide means for guiding the proximal end portion of the positioning pin is received. By holding in the part, the axis of the positioning pin can be made to coincide with the axis of the cylinder, and the positioning action is performed using the displacement force when the pallet is raised, so that accurate positioning is possible.

According to the present invention, when the tip of the positioning pin is inserted into the positioning hole of the workpiece and retracted into the cylinder by the pressing force in the axial direction of the positioning pin, the axis of the cylinder and the axis of the positioning pin coincide with each other. Since the guide means for guiding the base end portion of the positioning pin is provided, the final positioning is performed by the guide means when the positioning pin is retracted inside the cylinder. Generation of galling can be suppressed.
Furthermore, since the guide portion has a conical shape, the positioning pin axis and the cylinder axis can be easily aligned by the pressing force in the axial direction of the positioning pin, and the structure is simple and durable and reliable. improves.

1 is a schematic view of a workpiece positioning device in a first embodiment of the present invention. (A) is the state figure before the operation | movement of the positioning apparatus in 1st Embodiment of this invention, (B) shows the state figure which positioning completed. (A) is the state figure before the operation | movement of the positioning apparatus in 2nd Embodiment of this invention, (B) shows the state figure which positioning completed. The flowchart which shows the operation | movement process of the apparatus in 1st Embodiment of this invention is shown. The flowchart which shows the operation | movement process of the apparatus in 2nd Embodiment of this invention is shown. An explanatory view of prior art is shown.

  Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this embodiment are not intended to limit the scope of the present invention to that unless otherwise specified.

(First embodiment)
A workpiece positioning apparatus to which the present invention is applied will be described with reference to FIG.
The engine 1 is mounted in a posture defined by the engine fixing device 21 of the pallet 2. The pallet 2 is provided with an engine fixing device 21, a plurality of positioning devices 3, which will be described in detail later, at positions that maintain a relative positional relationship with the engine fixing device 21, and a pallet lifting device that displaces the pallet 2 up and down. ing.
The vehicle body 5, which is a mounted member to which the engine 1 is assembled, includes a fender panel 52, which is a member constituting an engine room, and an engine room panel 51 on the engine room side where front wheels (not shown) are arranged (see FIG. 1). The horizontal plane portion 53 is formed at the lower end portion while forming the closed cross-section portions 56 and 57 so as to be separated from the left region of the fender panel 52), and the downward bent portion 54 formed continuously from the horizontal plane portion 53. It has a structure that is combined with. The closed cross-section portions 56 and 57 and the bent portion 54 ensure the rigidity on the vehicle body side.
A positioning hole 55 on the vehicle body side is disposed in the horizontal plane portion 53.
A side member 59 is disposed adjacent to the closed cross-section portions 56 and 57 so as to extend in the longitudinal direction of the vehicle. The engine mount 6 is mounted on the upper side of the side member 59.
The engine mount 6 is provided with a through hole 61 for fastening with a female screw 12 formed in the mount mounting portion 11 on the engine 1 side. A bolt 63 fastens the mount mounting portion 11 on the engine 1 side to the engine mount 6.

The positioning device 3 includes a positioning pin 7 fitted into the positioning hole 55, a cylinder 8 that supports the positioning pin 7 so as to be able to advance and retreat, guide means 9 provided at the bottom of the cylinder 8, and the positioning pin 7. And urging means 10 for advancing and urging in the second axis CL2 direction.
The urging means 10 includes a receiving portion 91 of the guide means 9, a flange portion 74 disposed at an intermediate portion in the axial direction of the positioning pin 7, and a coil spring interposed between the receiving portion 91 and the flange portion 74. 75.

The positioning pin 7 has a conical inclined surface at the distal end portion of the pin 71, and a distal end guide portion 72 fitted into the positioning hole 55 on the vehicle body side as a guide, and the distal end guide portion 72 is positioned in the positioning hole 55. And a contact member 76 for restricting the insertion allowance of the pin 71, and a base end portion opposite to the tip guide portion 72 of the pin 71 has a similar conical inclined surface. The base end guide portion 73 having the conical tip apex coincident with the first axis CL1 which is the axis of the pin 71, and a flange portion 74 are provided.
The biasing means 10 resists friction (friction by the guide) between the inner peripheral edge of the positioning hole 55 and the conical inclined surface of the tip guide part 72 when the tip guide part 72 is inserted into the positioning hole 55. This is inserted into the positioning hole 55.

The cylinder 8 supports the positioning pin 7 through the pin through hole 81 provided at the top of the cylinder 8 so as to advance and retreat along the second axis CL2 of the cylinder 8.
The fitting clearance between the pin through-hole 81 and the pin 71 is formed such that the first axis CL1 of the pin 71 is substantially coincident with the second axis CL2 of the cylinder 8 and moves forward and backward.
The guide means 9 includes the base end guide portion 73 and a receiving portion 91 having a concave guide concave portion 92 having an inclined surface facing the conical inclined surface of the base end guide portion 73.
The tip of the conical top portion of the guide recess 92 is positioned on the second axis CL <b> 2 of the cylinder 8.
Further, the cross-sections of the conical inclined surfaces of the base end guide portion 73 and the guide concave portion 92 of the guide means 9 are conical inclined surfaces curved in a linear shape or a quadratic curve shape (the curve may be convex or concave). In either case, the same effect can be obtained.

The procedure of the positioning method using the positioning device will be described with reference to FIG.
In step S1, the engine 1 is first mounted on the engine fixing device 21 of the pallet 2 at a regular position as prescribed.
In step S2, the pallet 2 is installed at the position of the vehicle body 5 which is a member to be attached.
In step S3, the pallet 2 is displaced upward.
In step S <b> 4, the tip guide portion 72 is fitted along the peripheral edge of the positioning hole 55 on the vehicle body 5 side by the inclined surface of the tip guide portion 72. At this time, the positioning pin 7 is pressed so as not to be retracted into the cylinder 8 by the pressing force of the coil spring 75.
In step S5, the pallet 2 is further displaced upward, so that the contact member 76 contacts the positioning hole 55 and the insertion allowance of the positioning pin 7 with the positioning hole 55 is restricted.
In step S6, the insertion allowance of the positioning pin 7 is restricted, so that the positioning pin 7 is relatively retracted into the cylinder 8 against the urging force of the coil spring 75 of the urging means 10 (the pallet 2 is moved upward). To continue displacement).
In step S7, when the relative variation between the positioning pin 7 and the cylinder 8 disappears, the ascent of the pallet 2 is stopped.

In step S7, when the proximal end guide portion 73 of the guide means is held and fixed in the guide recess 92 of the receiving portion 91, the relative variation between the positioning pin 7 and the cylinder 8 is eliminated.
At this time, the proximal end guide portion 73 of the positioning pin 7 substantially coincides with the second axis CL <b> 2 of the cylinder 8.
On the other hand, as described above, the pin through-hole 81 portion of the cylinder 8 of the positioning pin 7 has a fitting clearance between the pin through-hole 81 and the pin 71 so that the first axis CL1 of the pin 71 is different from the second axis CL2 of the cylinder 8. The gaps are formed so as to advance and retreat along the second axis CL2 at substantially matching positions.

  Therefore, as shown in FIG. 2B, the pressing force (reaction force of the upward displacement of the pallet 2) of the positioning pin 7 in the direction of the first axis CL1 acts on the receiving portion 91 via the proximal end guide portion 73. As a result, the proximal guide portion 73 and the guide recess 92 are in close contact with each other, so that the first axis CL1 is corrected and moved with the pin through hole 81 of the positioning pin 7 as a fulcrum, and the first axis CL1 and the second axis CL2 are moved. As a result, the leading end guide portion 72 moves to coincide with the center line CL3 of the positioning hole 55, so that positioning with high accuracy is possible.

2B, the distance L1 between the pin through hole 81 of the cylinder 8 and the upper surface of the receiving portion 91 and the distance L2 between the pin through hole 81 of the cylinder 8 and the positioning hole 55 are L2. On the other hand, positioning is corrected by increasing L1 (the first axes CL1 and CL2 and the center line CL3 are matched).
Sometimes, the frictional resistance between the receiving portion 91 and the proximal end guide portion 73 is reduced, so that wear of the portion can be reduced and positioning correction can be facilitated. That is, the base end guide portion 73 may have a smaller corrected moving force with the pin through hole 81 as a fulcrum.

With this configuration, when the distal end guide portion 72 of the positioning pin 7 is fitted into the positioning hole 55 of the vehicle body 5 and is retracted into the cylinder by the pressing force in the first axis CL1 direction, Since the receiving portion 91 for guiding the proximal end guide portion 73 of the positioning pin 7 is provided so that the biaxial line CL2 and the first axis CL1 of the positioning pin 7 coincide with each other, most of the positioning pin 7 is retracted inside the cylinder At this time, the guide means 9 performs high-precision positioning correction.
Since the urging means 10 is constituted by the coil spring 75 interposed between the receiving portion 91 and the flange portion 74 provided in the intermediate portion of the positioning pin 7, the structure is simplified and the manufacturing cost of the equipment is increased. Can be reduced.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIGS. 3 (A), 3 (B), and FIG.
Since the second embodiment is the same as the first embodiment except for the shape of the positioning hole on the vehicle body side and the biasing means, detailed description of the entire pallet is omitted, and the same parts are denoted by the same reference numerals. Description is omitted.

The positioning device 4 is disposed at a specified position on the pallet 2.
65 is a side member on the vehicle body side, and a reinforcing member 66 for securing the rigidity of the side member 65 is disposed inside the side member 65.
A positioning hole 67 for positioning the vehicle body is provided on the bottom surface of the side member 65.
The positioning device 4 includes a positioning pin 25 that fits into the positioning hole 67, a cylinder 8 that supports the positioning pin 25 so as to advance and retreat, and guide means 9 provided at the bottom of the cylinder 8,
It comprises biasing means 15 for biasing the positioning pin 25 in the direction of the second axis CL2 of the cylinder 8.
The biasing means 15 includes a receiving portion 91 of the guide means 9, a flange portion 29 provided at an intermediate portion of the pin 26 and receiving compressed air in the direction of the second axis CL <b> 2 of the cylinder 8, and the receiving portion 91 and the flange portion 29. And a connector 18 connected to an air supply pipe 17 for supplying compressed air.

The positioning pin 25 has a conical inclined surface at the distal end portion of the pin 26, a distal end guide portion 27 that fits the inclined surface into the side member 65 side positioning hole 67 as a guide, and the distal end guide portion 27 of the pin 26. A proximal end guide portion 28 having a similar conical inclined surface at the opposite end, which has a conical inclined surface coincident with the first axis CL1 of the pin 71, and an air pressure. And a receiving collar 29.
The biasing means 15 is positioned against the friction (friction by the guide) between the inner peripheral edge of the positioning hole 67 and the conical inclined surface of the distal guide part 27 when the distal guide part 27 is inserted into the positioning hole 67. It is inserted into the hole 67.

The cylinder 8 supports the positioning pin 25 along the second axis CL2 of the cylinder 8 through a pin through hole 81 provided at the top of the cylinder 8 so as to be able to advance and retract.
The fitting clearance between the pin through-hole 81 and the pin 26 is formed so as to advance and retreat along the second axis CL2 at a position where the first axis CL1 of the pin 26 substantially coincides with the second axis CL2. Has been.
The guide means 9 includes the proximal end guide portion 28 and a receiving portion 91.
The tip of the conical top portion of the guide recess 92 is positioned on the second axis CL <b> 2 of the cylinder 8.

The procedure of the positioning method using the positioning device of the second embodiment will be described along FIG.
In step S11, first, the engine 1 is mounted on the engine fixing device 21 of the pallet 2 at a regular position as specified.
In step S12, the pallet 2 is installed at the position of the vehicle body 5 which is a member to be attached.
In step S <b> 13, compressed air is supplied between the flange portion 29 and the receiving portion 91 to advance the positioning pin 25 upward.
In step S14, the pallet 2 is displaced upward.
In step S15, the distal end guide portion 27 is fitted by the inclined surface of the distal end guide portion 27 along the inner peripheral edge of the positioning hole 67 on the side member 65 side. At this time, the positioning pin 25 is pressed so as not to be retracted into the cylinder 8 by the pressing force of the compressed air.

  In step S16, the pallet 2 is further displaced upward to bring the tip guide portion 27 into contact with the reinforcing member 66 of the side member 65, and the insertion allowance of the positioning pin 25 with the positioning hole 55 is restricted.

In step S17, the pallet 2 is further displaced upward, so that the positioning pin 25 is relatively retracted into the cylinder 8 against the compressed air of the urging means 10 (the pallet 2 continues to be displaced upward). )
In step S18, since the compressed air pressure between the collar 29 and the receiving part 91 is high, the compressed air in the part is discharged.
In step S19, when the relative variation between the positioning pin 25 and the cylinder 8 disappears, the ascent of the pallet 2 is stopped.

In step S <b> 19, when the proximal guide 28 is held and fixed in the guide recess 92 of the receiving portion 91, the relative variation between the positioning pin 25 and the cylinder 8 is eliminated.
At this time, the top end of the proximal end guide portion 28 of the positioning pin 25 substantially coincides with the second axis CL2.
On the other hand, as described above, the pin 26 and the pin through hole 81 have a fitting gap between the pin through hole 81 and the pin 26 at a position where the first axis CL1 of the pin 26 is close to the second axis CL2. The gap is formed so as to advance and retreat along the axis CL2.

  Accordingly, as shown in FIG. 3B, the first axis CL1, the second axis CL2, and the center line CL3 of the positioning hole 55 are pressed against the pressing force (the upward displacement of the pallet 2) of the positioning pin 25 in the first axis CL1 direction. Reaction force) acts on the receiving portion 91 via the proximal end guide portion 28, so that the proximal end guide portion 73 and the guide concave portion 92 are in close contact with each other, and therefore the first through the pin through hole 81 of the positioning pin 7 as a fulcrum. The axis line CL1 is corrected and moved so that the first axis line CL1 and the second axis line CL2 substantially coincide with each other, and the tip guide portion 72 moves accordingly, and the center line CL3 substantially coincides with each other.

With such a structure, when the distal end guide portion 27 of the positioning pin 25 is fitted into the positioning hole 67 of the side member 65 and is retracted into the cylinder 8 by the pressing force in the first axis CL1 direction, the cylinder 8 Since the receiving portion 91 that guides the proximal end guide portion 28 of the positioning pin 25 is provided so that the second axis CL2 of the positioning pin 25 and the first axis CL1 of the positioning pin 25 coincide with each other, most of the positioning pin 7 is retracted inside the cylinder. In this state, the guide means 9 performs high-precision positioning correction.
Further, since the positioning pin 25 is moved (biased) with compressed air, it can cope with a change in the height direction between the engine 1 (see FIG. 1) which is a workpiece and the side member 65 on the vehicle body side which is a mounted member. The versatility of the device is increased.
As the biasing means, the structure of the coil spring used in the first embodiment may be used in the second embodiment, or the compressed air used in the second embodiment may be used in the first embodiment. .

  The present invention can be used as a workpiece positioning apparatus and method for positioning by inserting positioning pins into positioning holes formed in the workpiece.

1 Engine (work)
2 Pallet 3, 4 Positioning device 5 Car body (attached member)
6 Engine mount 7 Positioning pin
8 Cylinder 9 Guide means 10 Biasing means 26, 71 Pins 27, 72 Tip guide portion 28, 73 Base end guide portion 29, 74 Fitting portion 55, 67 Positioning hole 75 Coil spring 91 Receiving portion 92 Guide recess CL1 First axis ( Axis)
CL2 2nd axis (axis)
CL3 center line

Claims (5)

A pallet with workpieces,
A positioning pin that fits into a positioning hole of a member to be attached to which the tip is attached to the workpiece;
A cylinder that is fixed to the pallet, internally fits the positioning pin, and supports the positioning pin so as to advance and retreat;
Urging means for urging the positioning pin in the advance direction in the cylinder;
And a guide means for guiding the base end portion of the positioning pin so that the axis of the positioning pin coincides with the axis of the cylinder when the positioning pin is retracted into the cylinder. Work positioning device.   The said guide means is comprised by the cone-shaped projection part formed in the base end part of the said positioning pin, and the cone-shaped recessed part facing this projection part, The Claim 1 characterized by the above-mentioned. Work positioning device.   2. The biasing means includes a flange portion disposed at an intermediate portion in the axial direction of the positioning pin, and a coil spring interposed between the guide means. The workpiece positioning device described.   2. The workpiece positioning apparatus according to claim 1, wherein the biasing means is performed by compressed air supplied between a flange portion disposed at an axially intermediate portion of the positioning pin and the guide means. . In a workpiece positioning method for positioning a workpiece mounted on a pallet with a mounted member to which the workpiece is attached,
A process of installing a pallet loaded with a workpiece at the position of the mounted member;
Displacing the pallet upward;
A step of fitting a distal end portion of a positioning pin disposed in a cylinder fixed to the pallet so as to be movable back and forth and biased in the advancing direction into a positioning hole provided in the attached member;
The rising of the positioning pin is stopped, the positioning pin is relatively retracted in the cylinder against the urging, and is held by the receiving portion of the guide means for guiding the base end portion of the positioning pin. And aligning the axis of the positioning pin with the axis of the cylinder;
A workpiece positioning method characterized by comprising:

Images