JP2010023147A - Centering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a centering device having a simple structure capable of performing centering without receiving restriction in the conveying form of a workpiece. <P>SOLUTION: The centering device is provided with a first grasping member 7 capable of grasping the workpiece W; a cylinder 5 for downwardly operating the first grasping member 7 when the workpiece is grasped and upwardly operating the first grasping member 7 when grasping of the workpiece W is released; a first member 8 arranged in parallel to the first grasping member 7 and integrally operated with the first grasping member 7; a second grasping member 14 facing the first grasping member 7 so as to clamp the workpiece W between itself and the first grasping member 7 and operated in a downward direction or an upward direction based on the downward operation of the first grasping member 7; an abutment member 13 arranged in parallel to the second grasping member 14 and facing the first member 8 so as to be abutted on the first member 8 when the first member 8 is downwardly operated; and a reverse rotation lever 15 capable of transmitting motion of the second grasping member 14 to the abutment member 13 while reversing it and capable of transmitting motion of the abutment member 13 to the second grasping member 14 while reversing it. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a centering device for centering a workpiece.

Conventionally, as this type of centering device, as disclosed in Patent Document 1, a pinion that is rotatably mounted on the device main body frame and a pinion that is meshed with the pinion are arranged in parallel with each other. And a pair of clampers attached to each of the pair of rack shafts so that the V-grooves face each other, and a pair of rack shafts are formed. Proposed.
In this centering device, when one rack shaft is pushed down, the other rack shaft is pushed up via a pinion so that a pair of clampers sandwich the rod-shaped workpiece and center the rod-shaped workpiece.
Japanese Utility Model Publication No. 5-12054

  However, in the above centering device, rack shafts are arranged on both sides in the radial direction across the rod-shaped workpiece. Therefore, when the rod-shaped workpiece is transported to the subsequent process, the rack shaft becomes an obstacle and restricts the conveyance mode of the rod-shaped workpiece. There was a problem of receiving.

The centering apparatus of the present invention aims to easily secure the centering structure without being restricted by the workpiece transfer form, and has adopted the following means in order to achieve this object.
The present invention is a centering device for centering a workpiece, wherein the first gripping member capable of gripping the workpiece, and operating the first gripping member in a first direction when gripping the workpiece, When releasing the grip of the workpiece, an operating means for operating the first gripping member in the second direction, a first member arranged in parallel with the first gripping member and operating integrally with the first gripping member, The first gripping member is provided opposite to the first gripping member so that the workpiece can be sandwiched between the first gripping member and the first direction or the first gripping member based on the operation of the first gripping member in the first direction. A second gripping member that operates in the second direction and a first member that is arranged in parallel with the second gripping member and that contacts the first member when the first member operates in the first direction. A contact member provided opposite to the second handle; With the movement of the member can be transmitted by reversing the abutment member, is summarized in that comprising said abutment member movements of the can inverted and transferred to the second gripping member reversing mechanism.

In the centering device of the present invention, when the first holding member comes into contact with the second holding member via the workpiece before the first member comes into contact with the contacting member, the contacting member comes into contact with the first member. The workpiece is centered by operating in the first direction with the workpiece held between the second holding member and the first holding member. Conversely, when the first member contacts the contact member before the first grip member contacts the second grip member via the workpiece, the second grip member contacts the first grip member via the workpiece. The abutting member operates in the first direction until it comes into contact, thereby centering the workpiece.
On the other hand, when releasing the workpiece, by operating the first holding member in the second direction, the first holding member, the second holding member, and the first member and the contact member are separated from each other. There are no restrictions on the workpiece transfer direction.
In this way, since only the contact between the first gripping member, the second gripping member, and the first member and the contact member and the release of the contact are performed, the centering can be performed without being restricted by the conveying form of the workpiece. A possible structure can be easily secured.

In the centering device of the present invention, the reversing mechanism has a reversing lever having one end locked to the second gripping member and the other end locked to the abutting member, and the second gripping member The movement of the second gripping member is reversed and transmitted to the contact member using the swing of the reversing lever with the position between the contact member and the contact member as a fulcrum, and the movement of the contact member is transmitted. It may be a mechanism for transmitting to the second gripping member.
If it carries out like this, while the movement of a 2nd holding member can be reversed and transmitted to a contact member, the mechanism which can reversely transmit the movement of a contact member to a 2nd holding member can be ensured easily.

Further, in the centering device of the present invention, the second gripping member so that the first member abuts on the abutting member before the first gripping member abuts on the second gripping member via the workpiece. And a biasing means for biasing the contact member in the first direction via the reversing lever.
In this way, when the workpiece is gripped, the first member can always be brought into contact with the contact member before the first gripping member contacts the second gripping member via the workpiece. . That is, the first member is first brought into contact with the contact member, the contact member is actuated in the first direction, the movement of the contact member in the first direction is reversed by the reversing lever, and the second gripping member is moved to the second direction. The workpiece can be centered by operating in the direction.

The centering device of the present invention may further include foreign matter removing means capable of removing foreign matter attached to the contact portion between the first member and the contact member.
In this way, foreign matter adhering to the contact portion between the first member and the contact member can be removed, so that centering failure due to foreign matter biting into the contact portion between the first member and the contact member can be suppressed.

In the centering device of the present invention, the foreign matter removing means may be means for removing the foreign matter adhering to the corresponding contact portion by blowing air to the contact portion.
In this way, foreign matter can be easily removed because only air is blown.

Moreover, the centering apparatus of this invention WHEREIN: The supply path which can supply the said air can also be formed in the said 1st member or the said contact member.
In this case, since a supply path capable of supplying air to the first member or the contact member is only formed, a structure for blowing air can be easily secured.

In the centering device of the present invention, the air pressure detecting means for detecting the air pressure by the air, and the contact for detecting the contact between the first member and the contact member based on the detected change in the air pressure It can also comprise a detection means.
By so doing, it is possible to reliably detect contact between the first member and the contact member. In addition, since the air supplied to the contact portion is used only for removing foreign matter, the structure is simplified.

In the centering device of the present invention, the contact between the first member and the contact member is detected by the operation amount detection means for detecting the operation amount of the first gripping member and the contact detection means. Completion determination means for determining that the centering of the workpiece is completed when the operation amount detected by the operation amount detection means reaches a predetermined amount may be provided.
By doing so, the completion of centering is determined based on both the contact between the first member and the contact member and the operation amount of the first gripping member, so that the determination of completion of centering can be made more reliable.

In the centering device of the present invention, the first gripping member, the second gripping member, the first member, the contact member, and the reversing mechanism so that the first direction and the second direction are vertical directions. Can also be arranged.
By so doing, the moving direction of the apparatus can be set to the vertical direction, so that the installation area of the apparatus can be kept small.

  Next, the best mode for carrying out the present invention will be described using examples.

FIG. 1 is a schematic side view of the centering device according to the first embodiment, FIG. 2 is a schematic front view of the centering device, and FIG. 3 is an enlarged view of the main part of the centering device 1 according to the embodiment. It is explanatory drawing shown.
This centering device 1 is a device that centers a camshaft, which is a workpiece W, between clampers 7 and 14, and is provided with a pair of left and right upper clamp mechanisms 3 and 3 at the upper part of the main body frame 2. A pair of left and right lower clamp mechanisms 4, 4 are provided at the lower portion of the main body frame 2 so as to face each other.
Hereinafter, the configuration of one upper clamp mechanism 3 and the lower clamp mechanism 4 will be described, and the description of the other one will be omitted because it is the same.

The upper clamp mechanism 3 mainly includes a cylinder 5 erected on the upper frame 2 a of the main body frame 2, and an upper clamper 7 and an upper connecting rod 8 provided on the lower surface of a block 6 moved up and down by the cylinder 5. It is configured as.
On the other hand, the lower clamp mechanism 4 includes a lifting rod 12 and a lower connecting rod 13 that can move up and down in the guide case 11 in parallel in the left-right direction in FIG. 1, and a lower accelerator 12 is provided at the upper end of the lifting rod 12. An abutting portion 13a projects from the upper end of the lower connecting rod 13, and the lower ends of the elevating rod 12 and the lower connecting rod 13 are connected to a reversible lever 15 that can swing.

  The center of the reversing lever 15 is supported by a fulcrum shaft 15a, and the lower end of the lifting rod 12 is connected to the right end of the reversing lever 15 extending in the left-right direction in FIG. 1 via a locking shaft 15b. The left end of the lever 15 in FIG. 1 is connected to the lower end of the lower connecting rod 13 via a locking shaft 15c. Here, the lifting rod 12 is always urged vertically downward by the spring mechanism 26. As a result, the lower connecting rod 13 is always urged vertically upward via the reversing lever 15, and before centering, the abutting portion 13a protrudes vertically upward from the lower accelerator 14 as shown in FIG. It will be in the state.

  As shown in FIG. 3, the spring mechanism 26 includes a coil spring 26 a and a snap ring 26 b, and one end of the coil spring 26 a is formed of a diameter expansion hole 11 b formed concentrically with the sliding hole 11 a of the guide case 11. While being in contact with the step portion 11 b ′, the other end is in contact with a snap ring 26 b attached and fixed to the lifting rod 12 to urge the lifting rod 12 vertically downward.

A V-shaped V groove 14 a on which the workpiece W is placed is formed on the upper surface of the lower ramper 14. The upper clamper 7 having the V-groove 7a on the lower surface is disposed above the lower accelerator 14 and the upper connection having the abutting portion 8a at the lower end facing the lower connection rod 13. The rod 8 is arranged upward.
The block 6 having the upper clamper 7 and the upper connecting rod 8 on the lower surface can be moved in the vertical direction along linear rails 17 along the rail 16, and the upper surface of the block 6 is suspended from the cylinder 5. The lower end of the provided cylinder rod 5a is connected, and when the cylinder rod 5a moves up and down, the upper clamper 7 and the upper connecting rod 8 move up and down together with the block 6.

  In order to supply the hydraulic pressure that operates the cylinder 5, an oil pipe 28 is connected to the cylinder 5 from a hydraulic source 27 such as a hydraulic motor, and a switching valve 19 that switches a hydraulic pressure supply direction is provided in the oil pipe 28. An air pipe 18 is connected from an air source 9 such as a compressor to an air supply path 20 provided in the block 6, and an air supply path 20 is connected to the upper connecting rod 8. Air can be ejected downward from the contact portion 8 a of the upper connecting rod 8.

A throttle valve 25 is provided in the air pipe 18 in order to adjust the amount of air jetted, and a pressure switch 21 is provided in the air pipe 18 to reduce the air pressure in the air pipe 18. The pressure switch 21 can be used for detection.
Here, the pressure switch 21 is set to be turned on when the abutting portion 8a of the upper connecting rod 8 and the abutting portion 13a of the lower connecting rod 13 come into contact with each other and the air pressure reaches a predetermined pressure. .
The cylinder 5 is provided with a limiter switch 22. The limiter switch 22 is set to be turned on when the cylinder rod 5a has been stroked by a stroke amount necessary for completing the centering of the workpiece W.
Signals from the pressure switch 21 and the limiter switch 22 are input to the control device 10.

Next, the operation of the centering device 1 will be described.
FIG. 5 is a process diagram illustrating the centering state of the workpiece W by the centering device 1 of the first embodiment.
First, as shown in FIG. 2, a camshaft as a work W is supported by a pair of left and right lower rampers 14, 14 so as to be substantially horizontal, and in this state, on the upper side of the cylinder 5 via a switching valve 19. The hydraulic pressure is supplied, and the cylinder rod 5a of the cylinder 5 is moved downward as shown in the enlarged explanatory view of the main part of FIG. Along with this, the upper clamper 7 and the upper connecting rod 8 are moved downward together with the block 6 (step S 10), whereby the lower connecting rod 13 that is constantly urged upward by the spring mechanism 26 and the upper connecting rod 8. Each contact part 8a and 13a contact | abut. Thus, when the contact portion 13a and the contact portion 8a contact each other, the air pressure becomes a predetermined pressure, and the pressure switch 21 is turned on (step S12).

  As the upper clamper 7 and the upper connecting rod 8 further move downward, the lower connecting rod 13 receives a pressing force and is pushed down, and the lifting rod 12 is pushed up via the reversing lever 15 so that the lower accelerator 14 moves upward. Will be lifted. At this time, the lower accelerator 14 operates upward with the workpiece W placed on the V-groove 14a. In this way, the centering is performed by the lower accelerator 14 coming into contact with the upper clamper 7 via the workpiece W. At this time, the limiter switch 22 is also turned on (step S12), and the centering of the workpiece W is completed (step 16). The completion of the centering of the workpiece W is determined by the control device 10, but the operator may be notified that the centering is completed by lighting a lamp, a buzzer, or the like.

On the other hand, if only one of the pressure switch 21 and the limiter switch 22 is on or both are off (step S14), it is determined that the centering of the workpiece W has not been completed, and both switches Steps S12 to S14 are repeatedly executed until is turned on.
Here, if both the pressure switch 21 and the limiter switch 23 are not turned on even after being repeatedly executed a predetermined number of times, it may be determined that there is an abnormality and the centering operation is stopped. At this time, the operator may be informed of the abnormality by lighting the lamp or buzzer.
Thus, since the completion of centering of the workpiece W is determined based on both the contact between the contact portion 13a and the contact portion 8a and the stroke amount of the cylinder rod 5a, the completion of the centering of the workpiece W should be made more reliable. Can do.

When releasing the grip of the workpiece W, the switching rod 19 is switched to supply hydraulic pressure to the lower portion of the cylinder 5 to raise the cylinder rod 5a. Accordingly, the upper clamper 7 and the upper connecting rod are connected via the block 6. 8 moves upward and is separated from the lower accelerator 14 and the lower connecting rod 13, so that the workpiece W can be transferred to either side in the left-right direction in FIG. Not receive.
As described above, since the upper clamper 7 and the lower accelerator 14 and the contact portion 8a and the contact portion 13a are only released from contact, the structure capable of performing centering without being restricted by the conveyance form of the workpiece W can be simplified. Can be secured.

In this example, air is ejected from the contact portion 8a of the upper connecting rod 8 toward the contact portion 13a of the lower connecting rod 13 so that the foreign matters attached to the contact portions 8a and 13a can be removed. Therefore, it is possible to suppress the occurrence of a centering failure due to foreign matter biting into the contact portions 8a and 13a.
Thus, the pressure switch 21 detects the pressure of the air to be ejected to remove foreign matter, so that the contact state between the upper connecting rod 8 and the lower connecting rod 13 can be detected, and the contact state is achieved with a simple structure. Can be reliably detected.

  In the centering device 1 of this example, the lower clamper 14 and the upper clamper 7 are arranged in the vertical direction so as to be movable in the vertical direction, and the upper connecting rod 8 and the lower connecting rod 13 are also movable in the vertical direction. Since it is arranged in the vertical direction, the centering device 1 can be vertically long, and the installation space for the centering device 1 can be kept small.

FIG. 6 is a schematic side view of the centering device of the second embodiment.
This centering device 1 is a device that centers a camshaft, which is a workpiece W, between clampers 7 and 14, and is provided with a pair of left and right upper clamp mechanisms 3 and 3 at the upper part of the main body frame 2. A pair of left and right lower clamp mechanisms 4, 4 are provided at the lower portion of the main body frame 2 so as to face each other.

  The upper clamp mechanism 3 mainly includes a cylinder 5 erected on the upper frame 2 a of the main body frame 2, and an upper clamper 7 and an upper connecting rod 8 provided on the lower surface of a block 6 moved up and down by the cylinder 5. It is configured as.

On the other hand, the lower clamp mechanism 4 includes a lifting rod 12 and a lower connecting rod 13 that can move up and down in the guide case 11 in parallel in the left-right direction in FIG. 1, and a lower accelerator 12 is provided at the upper end of the lifting rod 12. An abutting portion 13a protrudes from the upper end of the lower connecting rod 13, and the lower ends of the elevating rod 12 and the lower connecting rod 13 are connected to a reversible lever 15 that can swing.
The center of the reversing lever 15 is supported by a fulcrum shaft 15a, and the lower end of the lifting rod 12 is connected to the right end of the reversing lever 15 extending in the left-right direction in FIG. 1 via a locking shaft 15b. The left end of the lever 15 in FIG. 1 is connected to the lower end of the lower connecting rod 13 via a locking shaft 15c.

A V-shaped V groove 14 a on which the workpiece W is placed is formed on the upper surface of the lower ramper 14. The upper clamper 7 having the V-groove 7a on the lower surface is disposed above the lower accelerator 14 and the upper connection having the abutting portion 8a at the lower end facing the lower connection rod 13. The rod 8 is arranged upward.
The block 6 having the upper clamper 7 and the upper connecting rod 8 on the lower surface is configured to be movable in the vertical direction via a linear bearing 17 along a rail 16 that is suspended. The upper surface of the block 6 is connected to the lower end of a cylinder rod 5a suspended from the cylinder 5. When air is supplied to the cylinder 5 and the cylinder rod 5a moves up and down, the upper clamper 7 and the upper clamper 7 are moved together with the block 6. The connecting rod 8 is configured to move up and down.

In order to supply air for operating the cylinder 5, an air pipe 18 is connected to the cylinder 5 from an air source 9 such as a compressor, and a switching valve 19 is provided in the air pipe 18. The direction of vertical movement of the cylinder rod 5a can be switched by switching the supply direction.
Further, in this example, the air supply path 20 branches from the upstream side of the switching valve 19 of the air pipe 18, and the air supply path 20 is connected to the upper connecting rod 8. It is comprised so that it can be made to eject below from contact part 8a.

A throttle valve 25 is provided in the air supply path 20 in order to adjust the amount of air ejection, and a pressure switch 21 is provided in the air supply path 20, The air pressure can be detected by the pressure switch 21.
Here, the pressure switch 21 is set to be turned on when the abutting portion 8a of the upper connecting rod 8 and the abutting portion 13a of the lower connecting rod 13 come into contact with each other and the air pressure reaches a predetermined pressure. .
The cylinder 5 is provided with a limiter switch 22. The limiter switch 22 is set to be turned on when the cylinder rod 5a has been stroked by a stroke amount necessary for completing the centering of the workpiece W.
Signals from the pressure switch 21 and the limiter switch 22 are input to the control device 10.

Next, the operation of the centering device 1 will be described.
The state of centering of the workpiece W by the centering device 1 of this embodiment is illustrated in the process diagram of FIG.
First, a cam shaft as a workpiece W is supported substantially horizontally by a pair of left and right lower ramps 14, 14, and in this state, air is supplied from the air source 9 to the upper side of the cylinder 5 through the switching valve 19. Then, the cylinder rod 5a of the cylinder 5 is moved downward as shown in the enlarged explanatory view of the main part of FIG. Along with this, the upper clamper 7 and the upper connecting rod 8 move down together with the block 6 (step S10 in FIG. 5), and the upper clamper 7 comes into contact with the lower accelerator 14 with the workpiece W interposed therebetween. At this time, the contact portions 8a and 13a of the lower connecting rod 13 and the upper connecting rod 8 are not in contact.

  Due to the further downward movement of the upper clamper 7 and the upper connecting rod 8, the lower clamper 14 operates downward with the workpiece W sandwiched between the upper clamper 7 (between the V grooves 7a and 14a). At this time, as shown in FIG. 8, the lifting rod 12 receives the pressing force from the lower accelerator 14 and moves downward, and the downward movement of the lifting rod 12 is reversed by the reversing lever 15, and the lower connecting rod 13 and the lower connecting rod 13 operates upward. The lower connecting rod 13 operates upward until the contact portion 13 a contacts the contact portion 8 a of the upper connecting rod 8. Thus, when the contact part 13a and the contact part 8a contact each other, the air pressure becomes a predetermined pressure, and the pressure switch 21 is turned on (step S12 in FIG. 5). At this time, the limiter switch 22 is also turned on (step S12 in FIG. 5), and the centering of the workpiece W is completed (step S16 in FIG. 5). The completion of the centering of the workpiece W is determined by the control device 10, but the operator may be notified that the centering is completed by lighting a lamp, a buzzer, or the like.

On the other hand, if only one of the pressure switch 21 and the limiter switch 22 is on or both are off (step S14 in FIG. 5), it is determined that the centering of the workpiece W has not been completed. The processes of steps S12 to S14 are repeatedly executed until both switches are turned on. Here, if both the pressure switch 21 and the limiter switch 23 are not turned on even after being repeatedly executed a predetermined number of times, it may be determined that there is an abnormality and the centering operation is stopped. At this time, the operator may be informed of the abnormality by lighting the lamp or buzzer.
Thus, since the completion of centering of the workpiece W is determined based on both the contact between the contact portion 13a and the contact portion 8a and the stroke amount of the cylinder rod 5a, the completion of the centering of the workpiece W should be made more reliable. Can do.

  In addition, when the upper clamper 7 and the upper connecting rod 8 move downward and the contact portion 8a of the upper connecting rod 8 first contacts the contact portion 13a of the lower connecting rod 13, the lower connecting rod 13 The lower rod 12 is pushed down by receiving the pressing force, the lifting rod 12 is pushed up through the reversing lever 15, and the lower clamper 14 is lifted upward. The upper clamper 7 comes into contact with the lower clamper 14 through the workpiece W. The lower connecting rod 13 operates downward until the workpiece is centered.

  When releasing the workpiece W, the switching valve 19 is switched to supply air to the lower portion of the cylinder 5 to raise the cylinder rod 5a. Accordingly, the upper clamper 7 and the upper connecting rod are connected via the block 6. 8 moves upward and is separated from the lower accelerator 14 and the lower connecting rod 13, so that the workpiece W can be transferred to either side in the left-right direction in FIG. Not receive. As described above, since the contact between the upper clamper 7 and the lower accelerator 14 and the contact portion 8a and the contact portion 13a is merely released, the structure capable of performing the centering without being restricted by the conveying form of the workpiece W is simplified. Can be secured.

In addition, it is comprised so that the foreign material adhering to contact part 8a, 13a can be removed by ejecting air toward the contact part 13a of the lower connection rod 13 from the contact part 8a of the upper connection rod 8, It can suppress that a foreign material bites into contact part 8a, 13a, and a centering defect arises.
Thus, the pressure switch 21 detects the pressure of the air to be ejected to remove foreign matter, so that the contact state between the upper connecting rod 8 and the lower connecting rod 13 can be detected, and the contact state is achieved with a simple structure. Can be reliably detected.

  In the centering device 1 of this example, the lower clamper 14 and the upper clamper 7 are arranged in the vertical direction so as to be movable in the vertical direction, and the upper connecting rod 8 and the lower connecting rod 13 are also movable in the vertical direction. Since it is arranged in the vertical direction, the centering device 1 can be vertically long, and the installation space for the centering device 1 can be kept small.

Next, in the third embodiment shown in an enlarged manner in FIG. 9, a pinion 24 and a pair of left and right racks 23 in FIG. 9 that mesh with the pinion 24 are provided as a reversing mechanism.
That is, a rack 23 is formed in the vertical direction on the lifting rod 12, and a rack 23 is also formed in the vertical direction on the lower connecting rod 13 so as to face each other. The rack 23 of the lifting rod 12 and the rack 23 of the lower connecting rod 13 are formed. The pinion 24 is provided at the center so as to be able to rotate in a vertical plane so as to mesh with each other.
Other configurations are the same as those of the second embodiment of FIG. 6, and the same members are denoted by the same reference numerals and the description thereof is omitted.

  Also in the third embodiment, the cylinder 5 is actuated to move the upper clamper 7 and the upper connecting rod 8 together with the block 6 so that the upper clamper 7 moves to the work W before the upper connecting rod 8 contacts the lower connecting rod 13. When the lift rod 12 is pushed down and the lift rod 12 is lowered, the pinion 24 that meshes with the rack 23 of the lift rod 12 rotates in the clockwise direction. The connecting rod 13 is pushed up through the rack 23, and the contact between the contact portion 13a of the lower connecting rod 13 and the contact portion 8a of the upper connecting rod 8 is contacted between the upper clamper 7 and the lower clamper 14. Centering of the sandwiched workpiece W is performed satisfactorily.

Conversely, when the upper connecting rod 8 first contacts the lower connecting rod 13, a push-down force is applied to the lower connecting rod 13, and the pinion 24 that meshes with the rack 23 of the lower connecting rod 13 is counterclockwise. And the lifting rod 12 is pushed up, and in this case, the workpiece W is centered until the lower clamper 14 contacts the upper clamper 7 via the workpiece W.
Moreover, if the cylinder 5 is operated and the upper clamper 7 and the upper connecting rod 8 are raised, the workpiece W can be favorably moved in the transport direction without being restricted.

  In the above embodiment, the air supply path 20 is connected to the abutting portion 8a of the upper connecting rod 8 through the block 6, but the air supply path 20 is connected to the abutting portion 13a side of the lower connecting rod 13. It is also possible to connect so that foreign matter can be removed by ejecting air from the contact portion 13a of the lower connecting rod 13 to the upper connecting rod 8 side.

  As mentioned above, although embodiment of this invention was described using the Example, this invention is not limited to such an Example, In the range which does not deviate from the summary of this invention, it can implement with a various form. Of course.

It is a side schematic structure figure of the centering device of the 1st example. It is a front schematic block diagram of a centering apparatus. It is operation | movement explanatory drawing of the centering apparatus of 1st Example. It is operation | movement explanatory drawing of the centering apparatus of 1st Example. It is process drawing which illustrates the mode of the centering of the workpiece | work by a centering apparatus. It is a side surface schematic block diagram of the centering apparatus of 2nd Example. It is operation | movement explanatory drawing of the centering apparatus of 2nd Example. It is operation | movement explanatory drawing of the centering apparatus of 2nd Example. It is a principal part block diagram of the centering apparatus of 3rd Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Centering apparatus 2 Main body frame 2a Upper frame 3 Upper clamp mechanism 4 Lower clamp mechanism 5 Cylinder 5a Cylinder rod 6 Block 7 Upper clamper (1st holding member)
7a V groove 8 Upper connecting rod (first member)
8a Contact portion 9 Air source 10 Control device (contact detection means, completion determination means)
11 Guide case 12 Lifting rod 13 Lower connecting rod (contact member)
13a Contact part 14 Lower ramp (second gripping member)
15 Reverse lever (Reverse mechanism)
16 rail 18 air pipe 19 switching valve 20 air supply path (foreign matter removing means)
21 Pressure switch (air pressure detection means)
22 Limiter switch (operation amount detection means)
23 rack (reversing mechanism)
24 pinion (reversing mechanism)
25 Throttle valve 26 Spring mechanism 26a Coil spring 26b Snap ring 27 Hydraulic source 28 Oil pipe

Claims (9)

A centering device for centering a workpiece,
A first gripping member capable of gripping the workpiece;
An operating means for operating the first gripping member in a first direction when gripping the workpiece, and for operating the first gripping member in a second direction when releasing the gripping of the workpiece;
A first member arranged in parallel to the first gripping member and operating integrally with the first gripping member;
The first grip member is provided so as to face the first grip member so that the workpiece can be sandwiched between the first grip member and the first direction or the first direction based on the operation of the first grip member in the first direction. A second gripping member that operates in a second direction;
An abutting member disposed in parallel to the second gripping member and provided to face the first member so as to abut against the first member when the first member is operated in the first direction;
A reversing mechanism capable of reversing and transmitting the movement of the second gripping member to the contact member, and reversing and transmitting the movement of the contact member to the second gripping member;
A centering device comprising:   The reversing mechanism has a reversing lever having one end locked to the second gripping member and the other end locked to the abutting member, and is provided between the second gripping member and the abutting member. A mechanism for transmitting the movement of the second gripping member to the abutting member by using the swing of the reversing lever with a position as a fulcrum and transmitting the movement of the abutting member to the second gripping member The centering device according to claim 1, wherein   The second gripping member is biased in the second direction so that the first member contacts the contact member before the first gripping member contacts the second gripping member via the workpiece. The centering device according to claim 2, further comprising a biasing unit that biases the contact member in the first direction via the reversing lever.   The centering device according to claim 1, further comprising a foreign matter removing unit capable of removing foreign matter attached to a contact portion between the first member and the contact member.   The centering device according to claim 4, wherein the foreign matter removing means is means for removing the foreign matter adhering to the corresponding contact portion by blowing air to the contact portion.   The centering device according to claim 5, wherein a supply path capable of supplying the air is formed in the first member or the contact member. An air pressure detecting means for detecting an air pressure by the air;
A contact detection means for detecting contact between the first member and the contact member according to the detected change in the air pressure;
A centering device according to claim 6. An operation amount detecting means for detecting an operation amount of the first gripping member;
Centering of the workpiece is completed when the contact between the first member and the contact member is detected by the contact detection means and the operation amount detected by the operation amount detection means reaches a predetermined amount. Completion judging means for judging that
A centering device according to claim 7.   The first holding member, the second holding member, the first member, the abutting member, and the reversing mechanism are arranged so that the first direction and the second direction are vertical directions. The centering device according to claim 7.

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