JPH0722844B2 - Chuck device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a chuck device for gripping an outer periphery of a workpiece when processing an end surface or an outer peripheral surface of the workpiece.

[Conventional technology]

Conventionally, as a chuck device, for example, the actual open sho 59-173546
What is disclosed in the publication is known. This chuck device is as shown in FIGS. 6A and 6B, and a collet chuck 2 and a tightening ring 3 for squeezing the collet chuck 2 are provided at the tip of the lens holding shaft 1. Inside the collet chuck 2, a suction cup mounting shaft 5 having an air hole 4 formed in the shaft center is provided slidably in the axial direction, and a suction cup rubber 6 is provided on the tip side of the collet chuck 2. The air suction tube 7 is fixed and is attached to the opposite end. An air hole valve 8 is screwed onto the suction cup mounting shaft 5 in a direction perpendicular to the axis. A compression spring 9 is inserted between the end surface of the suction cup mounting shaft 5 on the side where the air suction tube 7 is mounted and the surface of the collet chuck 2 facing the inner space.

The air hole valve 8 penetrates an axially long notch 10 provided in the side wall of the collet chuck 2, and the head of the air hole valve 8 is slid in the notch 10 so that the suction cup mounting shaft 5 is spring-loaded. It is possible to pull in against 9. The surface of the lens 11 adsorbed on the suction cup rubber 6 is entirely in contact with the lens holding reference surface 12 provided slightly inward of the tip of the collet chuck 2 so that the suction cup mounting shaft 5 can be held. A stop claw 13 for locking the hole valve 8 is pivotally supported by a pin 14 planted on the side surface of the collet chuck 2.

In the chuck device having such a configuration, first, the lens
The polished surface of 11 is pressed against the suction rubber 6, and is sucked from the air suction tube 7 by a vacuum pump (not shown) to hold the lens 11 on the suction rubber 6. Next, hold the air hole valve 8 and hold the spring 9
Pulling in the suction cup mounting shaft 5 against the force of, and the stop claw 13 is hooked on the air hole valve 8 at the position where the peripheral portion of the lens surface of the lens 11 which is sucked by the suction cup rubber 6 is in close contact with the lens holding reference surface 12. Hold the lens in that position.

Then, the tightening ring 3 of the collet chuck 2 is tightened. In this case, it suffices to squeeze the chuck 2 until the inner surface of the tip of the collet chuck 2 comes into contact with the outer peripheral surface of the lens 11 sucked and held by the sucker rubber 6 without play, and it is not necessary to tighten the chuck 2 with a tightening force.

As a result, the lens 11 is held at the predetermined lens holding reference position of the chuck in close contact with the entire circumference and the collet chuck 2 prevents the lens 11 from being displaced in the radial direction. And
Processing is performed in this state.

Then, the lens 11 is removed by the following procedure.

First, the tightening ring 3 is loosened. As a result, the chuck 2 is opened. When the air hole valve 8 and the stop claw 13 are disengaged, the suction cup mounting shaft 5 advances by the force of the spring 9, and the lens 11 comes to a position protruding from the tip of the collet chuck 2. After that, when the air hole valve 8 is opened and atmospheric pressure is introduced into the air hole 4 in the suction cup mounting shaft 5, the lens 11 is disengaged from the suction cup rubber 6.

[Problems to be Solved by the Invention]

However, in the conventional chuck device, since the lens holding reference surface 12 is formed integrally with the collet chuck 2, the collet chuck 2 itself is deformed as the collet chuck 2 is tightened, and at the same time the lens holding reference surface is held. The reference plane 12 has also moved. Also, the collet chuck 2
The amount of fluctuation of the lens holding reference surface 12 also changed depending on the amount of tightening. Therefore, in the conventional chuck device, the lens cannot be accurately positioned in the thickness direction, the thickness of the lens varies, and it is difficult to perform highly accurate processing.

The present invention has been made in view of the above-mentioned conventional problems, and a chuck that does not cause variations in the wall thickness of a work piece and that can easily attach and detach a work piece particularly when a suction cylinder moving mechanism is provided. The purpose is to provide a device.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a chuck device for gripping an outer circumference of a workpiece, a gripping mechanism having gripping pawls which can be opened and closed so as to grip the outer circumference of the workpiece, and a coaxial mechanism at the center of the gripping mechanism. The chuck device is configured to have a cylindrical suction cylinder that is located at a specific position and is capable of sucking a workpiece at its tip and positioning the workpiece.

Further, the present invention relates to a chuck device for gripping an outer periphery of a work, a gripping mechanism having a gripping claw that can be opened and closed so as to grip the outer periphery of a work, and a gripping mechanism coaxially located at the center of the gripping mechanism. A suction cylinder that is capable of sucking a workpiece, a positioning cylinder that is positioned inside or outside the suction cylinder to position the workpiece, and a workpiece that is sucked by the suction cylinder contacts the positioning cylinder. The chuck device is configured to include a moving mechanism that moves the suction cylinder.

[Action]

In the chuck device of the present invention having the above-described configuration, the workpiece is sucked by the tip of the suction cylinder, and the workpiece is positioned. Next, the gripping mechanism is driven to close the gripping claw to grip the outer periphery of the workpiece. Then stop the adsorption,
Predetermined processing is performed on the workpiece while the workpiece is held by the holding claws. After processing, after sucking the work piece again with the suction cylinder, open the gripping claw of the gripping mechanism to release the shame,
The work piece is held only by the suction cylinder. Then, the suction is stopped and the workpiece is returned to the transfer device or the like.

Here, since the suction cylinder for suctioning and positioning the workpiece is in a fixed state regardless of the operation of the gripping mechanism, variation in the thickness of the workpiece does not occur.

On the other hand, in the chuck device of the present invention in which the positioning cylinder is provided separately from the suction cylinder and the suction cylinder moving mechanism is provided, first, the workpiece is suctioned at the tip of the suction cylinder. Then, the suction cylinder is moved by driving the moving mechanism until the workpiece sucked by the suction cylinder contacts the positioning cylinder. Next, the gripping mechanism is driven to close the gripping claw to grip the outer periphery of the workpiece. After that, the suction is stopped, and the workpiece is subjected to predetermined processing while the workpiece is held by the holding claws.

After processing, the moving mechanism is driven to move the suction cylinder forward, and the work piece is sucked again at the tip of the suction cylinder. After that, the holding claws of the holding mechanism are opened to release the holding, and the workpiece is held only by the suction cylinder. Then, the suction is stopped and the workpiece is returned to the transfer device or the like.

Even in this case, since the positioning cylinder that positions the workpiece is in a fixed state regardless of the operation of the gripping mechanism, the thickness of the workpiece does not vary.
Further, since the suction cylinder moving mechanism is provided, the attachment and detachment of the workpiece can be easily automated.

〔Example〕

(First Embodiment) FIG. 1 shows a chuck device of the present embodiment, in which an actuator 15 is used as a gripping mechanism, and the tip of the actuator 15 grips the outer periphery of a lens 16 which is a workpiece. A gripping claw 17 that can be opened and closed is provided. Also,
At the center of the outer actuator 15, a cylindrical suction cylinder 18 is fixedly provided coaxially with the actuator 15. The tip of the suction cylinder 18 is provided so as to be located in the vicinity of the tip of the grip claw 17, and contacts the one lens surface 16a of the lens 16 to contact the lens 1
6 can be adsorbed freely, and the lens 16 can be positioned in the thickness direction (horizontal direction in FIG. 1).

Further, a base 19 is fixedly installed at the base end of the outer charger 15. The central axis of this base 19 has an air suction passage.
20 is formed, and this air suction passage 20 is
It communicates with the inside of. The air suction passage 20 is connected to a vacuum pump (not shown).

In the chuck device having such a configuration, for example, the tip of the suction cylinder 8 is brought into contact with one lens surface 16a of the lens 16 transported by a transport device (not shown). Then, the lens 16 is sucked by the vacuum pump through the air suction passage 20 and the inside of the suction cylinder 18, and the lens 16 is suctioned at the tip of the suction cylinder 18, and the lens 16 is positioned. Next, the actuator 15 is driven to close the grip claw 17 to grip the outer circumference of the lens 16. After that, the suction is stopped, and the lens 16 is gripped by the grip claws 17 and the lens 16 is subjected to predetermined processing.

After processing, suction with the vacuum pump again, and the suction cylinder 18
After sucking the lens 16 at the tip of the lens 16, the grip claw 17 of the actuator 15 is opened to release the grip, and the lens 16 is held only by the suction cylinder 18. Then, the suction is stopped and the lens 16
To the transport device.

As described above, according to the present embodiment, the suction cylinder 18 that suctions and positions the lens 16 includes the grip claw of the actuator 15.
Since the lens 16 is in a fixed state regardless of the operation of the lens 17, variation in the thickness of the lens 16 does not occur.

As a result, the lens 16 can be held and processed with high accuracy.

(Second Embodiment) FIG. 2 shows a chuck device of the present embodiment, in which an actuator 15 is used as a gripping mechanism, and the tip of the actuator 15 grips the outer periphery of a lens 16 which is a workpiece. A gripping claw 17 that can be opened and closed is provided. In addition, a substantially cylindrical positioning tube 21 is fixed to the center of the actuator 15 coaxially with the actuator 15. Positioning tube
The tip of 21 is provided so as to be located in the vicinity of the tip of the grip claw 17, and contacts the one lens surface 16a of the lens 16 to position the lens 16 in the thickness direction (left and right direction in FIG. 2). It is possible.

Further, inside the positioning cylinder 21, a cylindrical suction cylinder 22 is provided coaxially with the positioning cylinder 21 so as to be airtight and slidable with respect to the positioning cylinder 21. The tip of the suction cylinder 22 is the lens surface.
The lens 16 can be adsorbed by contacting the 16a. Also, the suction cylinder 22
Is constantly urged in the forward direction (rightward in FIG. 2) by a compression spring 23 provided inside the base end of the positioning cylinder 21.

A base 19 is fixed to the base end of the actuator 15. An air suction passage 20 is formed in the central shaft portion of the base 19, and the air suction passage 20 communicates with the inside of the positioning cylinder 21 and the inside of the suction cylinder 22. The air suction passage 20 is connected to a vacuum pump (not shown). The vacuum pump is a suction means for adsorbing the lens 16 by the adsorbing cylinder 22 and also moves the adsorbing cylinder 22 adsorbing the lens 16 backwards against the force of the compression spring 23 (moving to the left in FIG. 2). ) Is also a moving mechanism.

In the chuck device having such a configuration, for example, the tip end of the adsorbing cylinder 22 advancing by the force of the compression spring 23 is brought into contact with one lens surface 16a of the lens 16 conveyed by a conveying device (not shown). Then, the lens 16 is sucked by the vacuum pump through the air suction passage 20, the inside of the positioning cylinder 21 and the inside of the suction cylinder 22, and the lens 16 is suctioned by the tip of the suction cylinder 22. Further, strong suction is performed by the vacuum pump, the suction cylinder 22 is moved backward against the force of the compression spring 23, and the suction cylinder 22 is held until one lens surface 16a of the lens 16 contacts the tip of the positioning cylinder 21. To move. Next, the actuator 15 is driven to close the grip claw 17 to close the lens.
Hold the outer circumference of 16. After that, the suction is stopped and the grip claw 17
With the lens 16 held by, the lens 16 is subjected to predetermined processing.

After processing, suction with the vacuum pump again, and the suction cylinder 22
After the lens 16 is sucked at the tip of the lens 16, the grip claw 17 of the actuator 15 is opened to release the grip, and the lens 16 is held only by the suction cylinder 22. Then, the suction force is slightly weakened, the suction cylinder 22 is moved forward by the force of the compression spring 23, the suction is stopped, and the lens 16 is returned to the transport device.

As described above, according to the present embodiment, the positioning cylinder 21 for positioning the lens 16 is in a fixed state regardless of the operation of the grip claws 17 of the actuator 15, and therefore the variation in the thickness of the lens 16 is caused. It never happens. As a result, the lens 16 can be held and processed with high accuracy. Also,
Since the suction cylinder 22 moving mechanism (vacuum pump) is provided,
The attachment / detachment of the lens 16 can be easily automated.

(Third Embodiment) FIG. 3 shows a chuck device of the present embodiment, in which a scroll chuck 24 is used as a gripping mechanism, and a lens 16 which is a workpiece is provided at the tip of the scroll chuck 24.
Openable and closable grip claws 25 for gripping the outer periphery of the are provided. At the center of the scroll chuck 24, a substantially cylindrical positioning tube 26 is fixed coaxially with the scroll chuck 24. The tip end of the positioning tube 26 is provided so as to be located near the tip end of the grip claw 25, and comes into contact with one lens surface 16a of the lens 16 in the thickness direction of the lens 16 (left-right direction in FIG. 3). Positioning is possible.

Further, inside the positioning cylinder 26, a cylindrical suction cylinder 27 is provided coaxially with the positioning cylinder 26 so as to be airtight and slidable with respect to the positioning cylinder 26. The tip of the suction cylinder 27 is the lens surface.
The lens 16 can be adsorbed by contacting the 16a.

A base 28 is fixed to the base end of the scroll chuck 24. An air suction pipe 29 is fixedly mounted on the central shaft portion of the base 28. The air suction pipe 29 slides on the outer circumference of the tip end of the suction cylinder 27 via an O-ring 30 so as to be airtight. It is movably provided, and its tip is located near the tip of the positioning cylinder 26. Further, an air suction passage 31 is formed in the base 28 separately from the air suction pipe 29.
Are communicated with the inside of the positioning tube 26. The air suction pipe 29 and the air suction passage 31 are independently connected to a vacuum pump (not shown). That is,
In this embodiment, two systems of suction mechanism are provided.

In the chuck device having such a mechanism, for example, the positioning cylinder 26 is provided to the one lens surface 16a of the lens 16 transported by the transport device (not shown) via the air suction passage 31.
Atmosphere is introduced therein to advance the adsorption cylinder 27, and the tip of the adsorption cylinder 27 is brought into contact. Then, the vacuum pump sucks the lens through the air suction tube 29 and the inside of the suction cylinder 27, and the lens 16 is suctioned at the tip of the suction cylinder 27. After that, the inside of the positioning cylinder 26 is made a negative pressure through the air suction passage 31 by the vacuum pump, and the suction cylinder 27 that adsorbs the lens 16 is moved backward, and one lens surface 16a contacts the tip of the positioning cylinder 26. The suction cylinder 27 is moved to. Next scroll chuck
24 is driven to close the grip claw 25 to grip the outer periphery of the lens 16. After that, the suction is stopped, and the lens 16 is subjected to predetermined processing while the lens 16 is held by the holding claw 25.

After processing, suction with the vacuum pump again, and the suction cylinder 27
After adsorbing the lens 16 at the tip of the scroll chuck
The gripping claw 25 of 24 is opened to release the gripping, and the lens 16 is held only by the suction cylinder 27. Then, another vacuum pump introduces the atmosphere into the positioning cylinder 26 via the air suction passage 31, and after advancing the adsorption cylinder 27, adsorption is stopped and the lens is moved.
Return 16 to the carrier.

As described above, according to the present embodiment, the positioning tube 26 for positioning the lens 16 includes the holding claw 25 of the scroll chuck 24.
Since it is in a fixed state regardless of the movement of
There is no variation in the wall thickness of 16. This allows
The lens 16 can be held and processed with high accuracy. Further, since the suction cylinder 27 moving mechanism (vacuum pump) is provided, the attachment / detachment of the lens 16 can be easily automated. Especially, since two systems of suction mechanism are provided, the lens 16
It is easy to adjust the timing when the lens 16 is attached and detached, and the lens 16 can be attached and detached without interfering with the pallet with respect to the lens 16 conveyed by the pallet or the like.

(Fourth Embodiment) FIG. 4 (a) shows a chuck device of the present embodiment, in which a scroll chuck 24 is used as a gripping mechanism, and a lens, which is a workpiece, is provided at the tip of the scroll chuck 24. Openable and closable grip claws 25 for gripping the outer circumference of 16 are provided. Also, in the center of the scroll chuck 24,
A cylindrical positioning tube 32 coaxial with the scroll chuck 24
Is fixed. The tip end of the positioning tube 32 is provided so as to be located in the vicinity of the tip end of the grip claw 25, and comes into contact with one lens surface 16a so as to contact the lens 16 in the thickness direction (FIG. 4 (a)).
In the vertical direction).

Further, at a substantially central position on the inner peripheral surface of the positioning cylinder 32, a base end (upper end) of a suction cylinder 33 made of a rubber bellows.
Are joined. The suction cylinder 33 is provided coaxially with the positioning cylinder 32 and is expandable and contractable only in the vertical direction. Further, a suction pad 34 is fixed to the tip (lower end) of the suction cylinder 33 so as to close the opening of the tip. A through hole 34a is formed at the center of the suction pad 34. Further, a spherical stop valve 35 is provided inside the suction cylinder 33 in a freely movable state (movable in and out of contact with the suction pad 34 and the like).

As shown in FIG. 4 (b), the stop valve 35 has a spherical small hole 35a penetrating in the three-dimensional direction. The relationship between the interval between the small holes 35a and the size of the through hole 34a of the suction pad 34 is such that any one of the small holes 35a faces the through hole 34a without fail.

On the other hand, the base 19 is fixed to the base end of the scroll chuck 24. An air suction passage 20 is formed in the central shaft portion of the base 19, and the air suction passage 20 communicates with the insides of the positioning cylinder 32 and the suction cylinder 33. Also,
The air suction passage 20 is connected to a vacuum pump (not shown).

In the chuck device having such a configuration, for example, the tip of the suction cylinder 33, which is descending by its own weight, is brought into contact with one lens surface 16a of the lens 16 transported by a transport device (not shown). And the air suction passage 20 by the vacuum pump
The lens 16 is sucked through the above, and the lens 16 is sucked by the tip of the suction cylinder 33. After that, suction is continued and suction cylinder
33 is contracted, and the adsorption cylinder 33 is contracted (raised) until one lens 16a comes into contact with the tip of the positioning cylinder 32. At this time, the stop valve 35 is in a floating state. next,
The scroll chuck 24 is driven and the grip claw 25 is closed to grip the outer periphery of the lens 16. After that, the suction is stopped, and the lens 16 is gripped by the grip claw 25.
Perform predetermined processing on 16.

After processing, the grip claw 25 of the scroll chuck 24 is opened to release the grip, and the lens 16 is held only by the suction cylinder 33. Here, the reason why the lens 16 can be held is that suction is stopped but atmospheric air is not introduced, so that the inside of the adsorption cylinder 33 is in a negative pressure state. Next, the atmosphere is introduced into the adsorption cylinder 33 through the air suction passage 20. At this time, the stop valve 35 is placed on the through hole 34a of the suction pad 34, and the atmosphere comes out only from the small hole 35a of the stop valve 35. For this reason, the suction cylinder 33 first expands (lowers) due to its own weight and the weight of the lens 16, and then the lens 16 moves to the suction pad.
You will be leaving 34. As a result, the lens 16 is returned to the transport device.

As described above, according to the present embodiment, the positioning tube 32 for positioning the lens 16 includes the holding claw 25 of the scroll chuck 24.
Since it is in a fixed state regardless of the movement of
There is no variation in the wall thickness of 16. This allows
The lens 16 can be held and processed with high accuracy. Further, since the suction cylinder 33 is made of bellows and the moving mechanism (vacuum pump) thereof is provided, the attachment / detachment of the lens 16 can be easily automated with a structurally simple and inexpensive structure.

(Fifth Embodiment) FIG. 5 (a) shows a chuck device of the present embodiment, in which a scroll chuck 24 is used as a gripping mechanism, and a lens which is a workpiece is attached to the tip of the scroll chuck 24. Openable and closable grip claws 25 for gripping the outer circumference of 16 are provided. At the center of the scroll chuck 24, a cylindrical positioning tube 36 is fixedly provided coaxially with the scroll chuck 24. The tip (lower end) of the positioning cylinder 36 has a grip claw 25.
It is provided so as to be positioned in the vicinity of the tip end of the lens, and can be positioned in contact with one lens surface 16a in the thickness direction of the lens 16 (vertical direction in FIG. 5A).

Further, on the outside of the positioning cylinder 36, a cylindrical suction cylinder 37 is fitted coaxially with the positioning cylinder 36 so as to be airtight and slidable. That is, the positioning cylinder 36 and the suction cylinder 37
An O-ring 38 is interposed between the suction cylinder 37 and the suction cylinder 37, and a ring-shaped groove 37a is formed on the inner peripheral surface of the upper end of the suction cylinder 37.
The O-ring 38 is engaged with the 7a to prevent the suction cylinder 37 from falling. The tip of the suction cylinder 37 is in contact with the lens surface 16a so that the lens 16 can be suctioned.

At the base end (upper end) of the scroll chuck 24, the base 39
Is fixed. An air suction passage 40 is formed in a central shaft portion of the base 39, and a large diameter valve chamber 40a is formed at a lower end of the air suction passage 40. The air suction passage 40 is
The positioning cylinder 36 and the suction cylinder 37 are in communication with each other.
The air suction passage 40 is connected to a vacuum pump (not shown). Further, in the valve chamber 40a, a circular valve 41, the plane of which is shown in FIG. 5B, is mounted at the upper end of the positioning cylinder 36 so as to be rotatable via the pin 42. The valve 41 has a small hole through its center.
41a is drilled. The valve 41 has a size capable of closing the upper end opening of the positioning cylinder 36.

In the chuck device having such a configuration, for example, the tip end of the suction cylinder 37 that is descending by its own weight is brought into contact with one lens surface 16a of the lens 16 transported by a transport device (not shown). Then, the air suction passage 40 is formed by the vacuum pump.
The lens 16 is sucked through the above, and the lens 16 is sucked at the tip of the suction cylinder 37. At this time, the valve 41 is in a state in which the upper end of the positioning cylinder 36 is opened, as shown by an imaginary line in FIG. Then, suction is further performed to raise the suction cylinder 37 that has suctioned the lens 16, and raises the suction cylinder 37 until one lens surface 16a contacts the tip (lower end) of the positioning cylinder 36. Next, the scroll chuck 24 is driven to close the grip claw 25 to grip the outer periphery of the lens 16. After that, suction is stopped and the lens is
Predetermined processing is performed on the lens 16 while holding the lens 16.

After processing, suction with the vacuum pump again, and the suction cylinder 37
After adsorbing the lens 16 at the tip of the scroll chuck
The grasping claw 25 of 24 is opened to release the grasping, and the lens 16 is held only by the suction cylinder 37. Next, the atmosphere is introduced into the adsorption cylinder 37 through the air suction passage 40. At this time, the valve 41 is
As shown by the solid line in FIG. 5A, the position is such that the upper end opening of the positioning cylinder 36 is closed. As a result, the atmosphere introduced into the adsorption cylinder 37 is limited to that passing through the small hole 41a of the valve 41. Therefore, first, the suction cylinder 37 moves down while sucking the lens 16, and then the lens 16 moves to the suction cylinder 37.
Leave from. As a result, the lens 16 is returned to the transport device.

As described above, according to the present embodiment, the positioning cylinder 37 for positioning the lens 16 includes the holding claw 25 of the scroll chuck 24.
Since it is in a fixed state regardless of the movement of
There is no variation in the wall thickness of 16. This allows
The lens 16 can be held and processed with high accuracy. Further, a moving mechanism (vacuum pump or the like) for the suction cylinder 37 is provided, and one air suction passage 40 is provided in the same manner as in the fourth embodiment.
The lens 16 can be attached and detached only by opening and closing the vacuum suction by the valve 41 and opening and closing the grip claw 25, and the automation can be achieved with a simple structure and at a low cost.

Although the scroll chuck 24 is used as the gripping mechanism in the third to fifth embodiments, the same effect can be obtained with a collet chuck. Further, in the second to fifth embodiments, the suction cylinders 22,27,33,37 are the positioning cylinders 21,26,32,36.
It may be provided inside or outside. Furthermore, although the tip of each suction cylinder 18, 22, 27, 33, 37 is a cylindrical end surface, the present invention is not limited to this embodiment, and is appropriately determined according to the shape of the workpiece to be sucked. It Also, the adsorption cylinder 18,2
You may provide things like a suction pad at the tip of 2,27,37. On the other hand, the chuck device shown in FIGS. 4 (a) and 5 (a) is limited to the use in which the axis is vertical as shown in the drawings, but the others are not limited to this.

〔The invention's effect〕

As described above, according to the chuck device of the present invention, since the suction cylinder or the positioning cylinder for positioning the workpiece, which is irrelevant to the operation of the gripping mechanism and is in the fixed state, is provided, Workpieces can be held and machined with high precision without variations in wall thickness, and especially when a suction cylinder moving mechanism is provided, work pieces can be easily attached and detached automatically. .

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a first embodiment of a chuck device of the present invention, FIG. 2 is a partially cutaway side view showing a second embodiment of the present invention, and FIG. 3 is a third view of the present invention. 4 is a partially cutaway side view showing an embodiment, FIG. 4 (a) is a partially cutaway side view showing a fourth embodiment of the present invention, and FIG. 4 (b) is a chuck device shown in FIG. 4 (a). A front view of the stop valve, FIG. 5 (a) is a partially cutaway side view showing a fifth embodiment of the present invention, and FIG. 5 (b) is a plan view of the valve of the chuck device shown in FIG. 5 (a). 6 (a) is a longitudinal sectional view showing a conventional chuck device, and FIG. 6 (b) is a plan view showing a main part of the chuck device shown in FIG. 6 (a). 15 …… Actuator 16 …… Lens 17,25 …… Grip claw 18,22,27,33,37 …… Suction cylinder 20,31,40 …… Air suction passage 21,26,32,36 …… Positioning cylinder 23 ...... Compression spring 24 …… Scroll chuck 29 …… Air suction pipe 34 …… Suction pad 35 …… Stop valve 41 …… Valve

Claims (2)

[Claims] 1. A chuck device for gripping an outer periphery of a work piece, comprising: a gripping mechanism having a gripping claw that can be opened and closed so as to grip the outer circumference of the work piece; A chuck device comprising a cylindrical suction cylinder that is capable of sucking a workpiece and positioning the workpiece. 2. A chuck device for gripping an outer circumference of a workpiece, and a gripping mechanism having a gripping claw that can be opened and closed to grip the outer circumference of the workpiece, and a gripping mechanism coaxially located at the center of the gripping mechanism. A suction cylinder that is capable of sucking a workpiece, a positioning cylinder that is positioned inside or outside the suction cylinder to position the workpiece, and a workpiece that has been sucked by the suction cylinder sucks until it contacts the positioning cylinder. A chuck device comprising: a moving mechanism for moving a cylinder.