JP2003165006A - Chuck device for bar-like work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly chuck bar-like work and to improve durability of a chuck member. <P>SOLUTION: Inner diameter D1 of the chuck member 3 in a normal time is substantially equal to or smaller than the outer diameter of the bar-like work W. Therefore, in chucking the bar-like work W, the chuck member 3 can chuck the bar-like work W only by putting the chuck member 3 into a normal state. At this time, the chuck member 3 does not deform elastically, and distortion by elastic deformation does not occur in the chuck member 3. The chuck member 3 therefore, uniformly closely contacts to the bar-like work W, so that the chuck member 3 can certainly chuck the bar-like work W. The chuck member 3 closely contacts to the bar-like work W through the face, so that the chuck member 3 does not abrade or damage, different from the point contacts, and the durability of the chuck member 3 is improved. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for chucking a rod-shaped work. In particular, the present invention relates to a rod-shaped workpiece chucking device capable of reliably chucking a rod-shaped workpiece and improving the durability of a chuck member.

Here, the rod-shaped work means, for example, a work having a cylindrical shape, a work having a cylindrical shape, a work having a rectangular tube shape, a work having a prismatic shape, or the like, which is molded by an injection molding machine or the like. Examples of the cylindrical work include a test tube, a pipette or a syringe for medical supplies, a cylindrical object having a magnetic surface, a shaft body of a ballpoint pen or a mechanical pencil, a roller having a small surface roughness, and the like.

[0003]

2. Description of the Related Art A conventional chuck device for a rod-shaped work will be described below with reference to FIGS. The structure of the conventional chuck device includes a main body 101 having a circular through hole 100 having an inner diameter larger than the outer diameter of a rod-shaped work (test tube in this example) W, and a ring-tube-shaped elastic member (for example, rubber). ) Of the ring tube and the axis OO of the ring tube and the axis OO of the through hole 100 are aligned in substantially the same direction, and are arranged in the through hole 100 and attached to the main body 101. Chuck member 10
2 and a compressor passage 103 communicating with the inside of the chuck member 102 and connected to a compressor device (not shown). The inner diameter of the chuck member 102 is larger than the outer diameter of the rod-shaped work W in a normal state, and has a dimension capable of releasing the chucked state of the rod-shaped work W.

The operation of the conventional chuck device is to insert the rod-shaped work W into the chuck member 102 in the normal state (see FIG. 14). Next, the compressor device is driven to drive compressed air (for example, about 0.1 to 0.2 NPa).
Is supplied into the chuck member 102 through the compressor passage 103. Then, the chuck member 10 is compressed by the compressed air.
2 elastically deforms and expands to chuck the rod-shaped work W (see FIG. 15). Further, the driving of the compressor device is stopped and the compressed air in the chuck member 102 is discharged through the compressor passage 103. Then, the chuck member 102
Contracts due to the elastic return force, the chucked state of the rod-shaped workpiece W is released, and the rod-shaped workpiece W can be discharged from the chuck member 102 (see FIG. 14).

[0005]

In the conventional chuck device described above, since the inner diameter of the chuck member 102 is larger than the outer diameter of the rod-shaped workpiece W in the normal state, when the rod-shaped workpiece W is chucked, the chuck is performed by compressed air. Member 102
Need to be elastically deformed and expanded. However, when the chuck member 102 is elastically deformed and expanded, the elastic deformation of the chuck member 102 causes distortion in the chuck member 102. Therefore, in the conventional chuck device, due to the distortion, the chuck member 102 does not uniformly adhere (compress) to the rod-shaped workpiece W but sparsely adheres to it.
For example, as shown in FIG. 15A, the chuck member 102 comes into close contact with the rod-shaped work W in a wavy state in the axis Z-Z direction of the ring tube. In addition, FIG.
As shown in (B), in the direction orthogonal to the axis Z-Z of the ring tube, the chuck members 102 closely contact the rod-shaped work W at three points at substantially equal intervals. In the conventional chuck device, the state of three-point contact at almost equal intervals is often seen, but the two-point contact or four-point contact is not at equal intervals.
There is also a state of close contact above the point.

As a result, the conventional chuck device has a problem in securely chucking the rod-shaped workpiece W. Moreover, in the conventional chuck device, since the chuck member 102 is in point contact with the rod-shaped workpiece W, the point contact portion of the chuck member 102 is easily worn and damaged, and there is a problem in durability of the chuck member 102.

It is an object of the present invention to provide a rod-shaped workpiece chucking device capable of reliably chucking a rod-shaped workpiece and improving the durability of a chuck member.

[0008]

In order to achieve the above object, the invention according to claim 1 provides a main body provided with a through hole whose inner dimension is larger than the outer dimension of a rod-shaped work, and a ring tube shape. And a chuck member attached to the main body and arranged in the through hole with the axis of the ring tube and the axis of the through hole aligned substantially in the same direction. A vacuum passage communicating with the inside of the member and connected to a vacuum device, and the inner diameter of the chuck member is, at normal times, approximately the same as or smaller than the outer dimension of the rod-shaped workpiece, and chucks the rod-shaped workpiece. The size of the bar-shaped work is larger than the outer size of the bar-shaped work when the vacuum device is driven, and the chucked state of the bar-shaped work can be released. And wherein the door.

As a result, in the invention according to claim 1, since the inner diameter of the chuck member in the normal state is substantially equal to or smaller than the outer dimension of the rod-shaped work, when chucking the rod-shaped work, the chuck member is put in the normal state. Just do
The chuck member can chuck a rod-shaped work. At this time, since the chuck member does not elastically deform,
No distortion due to elastic deformation occurs in the chuck member.
For this reason, in the invention according to the first aspect, the chuck member can uniformly adhere the rod-shaped work, so that the rod-shaped work can be reliably chucked. Further, in the invention according to claim 1, since the chuck member is brought into surface contact with the rod-shaped work, there is no possibility that the chuck member is worn and damaged like point contact, and the durability of the chuck member is improved.

Further, according to the first aspect of the invention, the vacuum device is driven to bring the inside of the chuck member into a vacuum state through the vacuum passage, whereby the chuck member is elastically deformed and expanded to release the chuck state. . At this time, even if the chuck member is elastically deformed and the chuck member is distorted, since the chuck member is in the released state, there is no problem with the chuck of the rod-shaped workpiece.

Further, the invention according to claim 1 is to release the chuck state in a state where the chuck member is in a normal state and in a state where the chuck member is elastically deformed and expanded. On the other hand, the conventional apparatus releases the chuck state in the normal state of the chuck member, and elastically deforms the chuck member to expand the chuck member to bring it into the chuck state. As described above, the invention according to claim 1 can reliably chuck a rod-shaped work by an idea contrary to the conventional one.

According to the second aspect of the present invention, the annular member is arranged in the main body, and the internal dimension of the annular member is the internal dimension of the through hole of the main body and the chuck member at the time of releasing the chuck of the rod-shaped workpiece. Is smaller than the inner diameter of the rod-shaped work and larger than the outer diameter of the rod-shaped work and the inner diameter of the chuck member when chucking the rod-shaped work.

As a result, according to the second aspect of the invention, the rod-shaped work can be prevented from hitting the main body or the like when the rod-shaped work is inserted into or removed from the chuck member by the annular member. It can prevent scratches. That is, the rod-shaped work can be protected from objects other than the chuck member. Further, since the inner diameter of the chuck member becomes larger than the inner diameter of the annular member at the time of releasing the chuck of the rod-shaped workpiece, even if the chuck member and the rod-shaped workpiece are in close contact with each other, the rod-shaped workpiece contacts the annular member and becomes the rod-shaped workpiece. The chuck member can be reliably separated. That is, the rod-shaped work can be reliably discharged from the chuck member.

In the invention according to claim 3, a plurality of chuck members are attached to the main body with a space therebetween, and when chucking a rod-shaped work, adjacent chuck members, the main body, and the rod-shaped work are provided. A sensor path connected to a sensor for detecting the chucking state of the rod-shaped work is communicated with the space defined by.

As a result, in the invention according to claim 3, when the rod-shaped work is securely chucked, the space is in a closed state and air does not flow (vacuum state), so the air flows. The state where the rod-shaped work is not chucked, that is, the state where the rod-shaped work is securely chucked is detected by the sensor via the sensor path. On the contrary, if the rod-shaped work is not securely chucked, the space will be open and the air will be flowing (atmosphere). The state in which it is not chucked is detected by the sensor via the sensor path. In this way, it is possible to reliably detect whether or not the rod-shaped work is securely chucked.

Further, according to the third aspect of the present invention, when it is used as a chucking device of a take-out device for taking out a plurality of rod-shaped workpieces molded by a molding machine, it can be surely confirmed whether or not the rod-shaped workpieces are securely chucked. Because it can be detected
It is possible to reliably detect whether or not the rod-shaped work is taken out from the molding machine. That is, if the state where the rod-shaped work is chucked is detected, it can be detected that the rod-shaped work is taken out from the molding machine, and conversely, if the state where the rod-shaped work is not chucked is detected, the rod-shaped work is detected. It can be detected that it has not been taken out from the molding machine. As a result, the rod-shaped work is left behind in the molding machine, so that damage or breakage of the mold or the molding machine can be prevented.
In particular, in the invention according to claim 3, since the sensor paths of the plurality of chuck devices are bundled into a single sensor path, a single sensor can detect the take-out state of a plurality of rod-shaped workpieces. The cost is very low.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of a chuck device for a rod-shaped work according to the present invention will be described below with reference to FIGS. The present invention is not limited to this embodiment.

First, the configuration of the embodiment will be described. In the figure, the same reference numerals as those in FIGS. 14 and 15 indicate the same components.

In the figure, reference numeral 1 is a chuck device for a rod-shaped work according to this embodiment. The chuck device 1 is
It comprises a body 2, a chuck member 3, a vacuum passage 4, an annular member 5 and a sensor passage 6.

The main body 2 is provided with a circular through hole 7 whose inner dimension (inner diameter) is larger than the outer dimension (outer diameter) of the rod-shaped workpiece W. The main body 2 is composed of a housing 8 and two caps 9 which are respectively screwed and attached to both ends of the housing 8.

The chuck member 3 is composed of a ring tube-shaped elastic member (for example, rubber).
The two chuck members 3 are arranged along the axis Z- of the ring tube.
Z and the axis O-O of the through hole 7 are aligned at substantially the same direction, and are arranged at both ends in the through hole 7.
In addition, the two chuck members 3 are opened at both ends of the main body 2, and a holder 10, a pressing ring 11, and
The O-ring 12 and the O-ring 12 are attached respectively.

As shown in FIG. 1, the inner diameter D1 of the chuck member 3 in the normal state is substantially equal to or smaller than the outer diameter of the rod-shaped work W, and the rod-shaped work W can be chucked. Further, the inner diameter D2 of the chuck member 3 when the vacuum device (not shown) is driven is larger than the outer diameter of the rod-shaped workpiece W, and has a dimension that allows the chucked state of the rod-shaped workpiece W to be released.

A vacuum passage 13 communicating with the inside of the chuck member 3 is provided in each of the housing 8 and the holder 10. An L-shaped vacuum connecting pipe 14 is connected to the vacuum passage 13. The vacuum connecting pipe 14 is provided in the housing 8
It is screwed on and attached. A vacuum pipe 15 is connected to the vacuum connection pipe 14.
The vacuum pipe 15 is connected to a vacuum device. The vacuum passage 13, the vacuum connecting pipe 14, and the vacuum pipe 15 constitute a vacuum passage 4.

The annular member 5 is made of, for example, silicon and is arranged at both ends of the through hole 7 of the main body 2. That is, the annular member 5 is fixed between the cap 9 and the holder 10. The annular member 5 protects the rod-shaped workpiece W, and when the chuck of the rod-shaped workpiece W is released, the rod-shaped workpiece W is
The chuck member 3 and the chuck member 3 are separated from each other. The annular member 5 has an annular shape. The inner dimension (inner diameter) of the annular member 5 is smaller than the inner diameter of the through hole 7 and the inner diameter D2 of the chuck member W when the chuck of the rod-shaped workpiece W is released, and the outer diameter of the rod-shaped workpiece W and the inner diameter. The size is larger than the inner diameter D1 of the chuck member 3 when chucking the rod-shaped work W.

Between the two chuck members 3, a ring-shaped middle collar 16 made of, for example, silicon is fixed. When chucking the rod-shaped work W, the chuck members 3 adjacent to each other
And the middle collar 16 (main body 2) and the rod-shaped work W
The space S is partitioned by and. A sensor passage 17 communicating with the space S is provided in each of the middle collar 16 and the housing 8. The sensor passage 17
An L-shaped sensor connection pipe 18 is connected to the. The sensor connection pipe 18 is screwed and attached to the housing 8. A sensor pipe 19 is connected to the sensor connection pipe 18. The sensor pipe 19
Is connected to a sensor (not shown) that detects the chucking state of the rod-shaped workpiece W. The sensor passage 17, the sensor connection pipe 18, and the sensor pipe 19 form the sensor passage 6.

The inner diameter of the middle collar 16 is substantially the same as the inner diameter of the annular member 5. Further, the vacuum connection pipe 14 and the sensor connection pipe 18 are the main body 2
It may be configured to be rotatable with respect to.

6 to 11, reference numeral 20 denotes a take-out device equipped with the chuck device 1 for a rod-shaped work according to this embodiment. The take-out device 20 includes a moving member 21, a moving device (not shown), a vacuum device, and a sensor. The moving member 21 is equipped with a plurality of chuck devices 1, 16 in this example, corresponding to the 16 rod-shaped workpieces W formed by the forming machine 22, respectively. The moving member 21 is moved between the molding machine 22 and the work receiver 23 by the moving device. A pusher plate 24 is attached to the moving member 21 so as to face the 16 chuck devices 1 and to move back and forth. The vacuum passages 4 of the 16 chuck devices 1 are respectively connected to the vacuum devices. The sensor paths 6 of the 16 chuck devices 1 are connected to the sensors.

The molding machine 22 is, for example, an injection molding machine, and is composed of a movable mold 25 and a fixed mold 26. A plurality of rod-shaped works W, in this example, 16 rod-shaped works W can be injection-molded in one step. The number of rod-shaped works W to be formed is not limited to this example.

The chuck device 1 for a rod-shaped work according to this embodiment has the above-described structure, and its operation will be described below.

First, in the molding machine 22, 16 rod-shaped works W are injection-molded. After that, the movable mold 25 is moved in the direction of the arrow in FIG. 8 to open the mold. During this time, the moving member 21 of the take-out device 20 is located at the standby position shown in FIG. At this time, the chuck device 1 is in the state shown in FIGS. 3 and 5 (A). That is, the vacuum device is being driven, and the inside of the chuck member 3 is the vacuum path 4
The chuck member 3 is elastically deformed and expanded, and the chuck state is released. In this state, even if the chuck member 3 is elastically deformed and the chuck member 3 is distorted, since the chuck member 3 is in the released state of the chuck state, there is no problem with the chuck of the rod-shaped workpiece W. There is no. At this time, the pusher plate 24 is located at the position indicated by the solid line in FIG. 7.

Next, the moving member 21 of the take-out device 20.
Is moved from the standby position shown in FIG. 8 in the direction of the arrow in FIG. 9 to the chuck position shown in FIG. After that, the movable mold 25 is moved in the direction of the arrow in FIG. 9, and as shown in FIGS. 3 and 5A, the formed 16 rod-shaped works W are chucked by 16 chuck members of the chuck device 1. Insert in 3.

Then, the driving of the vacuum device is stopped, and the inside of the chuck member 3 is returned to the atmospheric pressure via the vacuum passage 4. Then, as shown in FIG. 4 and FIG. 5B, the chuck member 3 contracts due to the elastic return force and returns to the normal state to chuck the rod-shaped work W. Like this one
Six rod-shaped works W can be chucked at one time. At this time, since the chuck member 3 is not elastically deformed, the chuck member 3 is not distorted due to elastic deformation. For this reason, the chuck member 3 uniformly adheres the rod-shaped work W, so that the rod-shaped work W can be reliably chucked. Further, since the chuck member 3 comes into surface contact with the rod-shaped work W, there is no possibility that the chuck member 3 is worn and damaged as in the case of point contact, and the durability of the chuck member 3 is improved.

Subsequently, the movable mold 25 is moved in the direction of the arrow in FIG. 10, and the moving member 2 of the take-out device 20 is moved.
1 is moved in the direction of the arrow in FIG. As a result, the rod-shaped work W is taken out from the molding machine 22.
At this time, since the rod-shaped work W is in the chuck state,
As shown in FIG. 4, the space S is defined by the adjacent chuck members 3, the middle collar 16 (main body 2), and the rod-shaped work W. This space S communicates with the sensor via the sensor path 6.

As a result, the sensor detects whether 16 bar-shaped works W are chucked by the chuck member 3. That is, when all 16 rod-shaped works W are securely chucked by the chuck member 3, all 16 spaces S are in a hermetically sealed state and no air flows (vacuum state). As a result, the state where the air is not flowing, that is, the state where the 16 rod-shaped works W are securely chucked is detected by the sensor via the sensor path 6. On the contrary, if at least one rod-shaped work W is not securely chucked, the rod-shaped work W
The space S of the chuck device 1 that is not chucked is in an open state, and air is flowing (atmosphere state).
Thus, the state where the air is flowing, that is, the state where the rod-shaped workpiece W is not reliably chucked is detected by the sensor via the sensor path 6. Thus, 16
Whether or not the individual rod-shaped works W are securely chucked can be reliably detected at one time with one sensor. Ie 1
By bundling the sensor paths 6 of the six chuck devices 1 and integrating them into one, it is possible to detect the take-out state of the 16 rod-shaped workpieces with one sensor, so the manufacturing cost is very low. Even if the number of rod-shaped workpieces W that are not securely chucked changes, the amount of air flow only changes. Therefore, by detecting the flow of air, it is determined whether or not the rod-shaped work W is reliably caught. Can be detected. Further, by disposing one sensor in each chuck device 1, it is possible to reliably detect the position of the rod-shaped work W that is not caught.

Here, if the sensor detects the rod-shaped workpiece W that is not reliably caught, the movable-side die 25
Therefore, the rod-shaped work W is left behind. In this case, the rod-shaped work W left unmoved on the movable side mold 25 is removed before performing mold clamping. As a result, the rod-shaped workpiece W is left behind in the molding machine 22, and the mold 2
5, 26 and the molding machine 22 can be prevented from being damaged or broken.

Then, as shown in FIG. 11, the movable mold 25 is moved to the work receiver 23. Here, the vacuum device is driven to bring the inside of the chuck member 3 into a vacuum state through the vacuum passage 4. Then, FIG. 3 and FIG.
As shown in, the chuck member 3 is elastically deformed and expanded, and the chuck state is released. As a result, the rod-shaped work W is discharged from the chuck device 1 to the work receiver 23. At this time, by moving the pusher plate 24 from the position shown by the solid line in FIG. 7 to the position shown by the chain double-dashed line, the rod-shaped workpiece W can be more reliably discharged from the chuck device 1. In addition, while the rod-shaped workpiece W is being discharged from the chuck device 1, the movable-side mold 25 is moved to perform mold clamping to proceed to the next molding step.

As described above, since the rod-shaped workpiece chucking device 1 according to this embodiment has the above-described structure, the rod-shaped workpiece W can be reliably chucked and the durability of the chuck member 3 is improved. . Further, since the rod-shaped work take-out device 20 according to this embodiment is configured as described above, it is possible to reliably detect whether or not the rod-like work W has been taken out from the molding machine 22.

Particularly, when the rod-shaped workpiece chucking device 1 according to this embodiment uses the annular member 5 and the middle collar 16 made of silicon, for example, when the rod-shaped workpiece W is inserted into or removed from the chuck member 3. Moreover, since it is possible to prevent the bar-shaped work W from hitting the main body 2 or the like, it is possible to prevent the bar-shaped work W from being damaged. That is, the rod-shaped work W can be protected from objects other than the chuck member 3. Further, when the chuck of the rod-shaped work W is released, as shown in FIG. 3 and FIG.
Since the inner diameter D2 of the rod member W is larger than the inner diameters of the annular member 5 and the intermediate collar 16, the rod-shaped workpiece W can contact the annular member 5 and the intermediate collar 1 even if the chuck member 3 and the rod-shaped workpiece W are in close contact with each other.
The bar-shaped workpiece W and the chuck member 3 can be reliably separated by coming into contact with the workpiece 6. That is, the rod-shaped work W can be reliably discharged from the chuck member 3.

12 and 13 show a modification of the chuck device for a rod-shaped work. 1 to 11 and 14 in the figure
The same reference numerals as those in FIG. 15 denote the same elements. The chuck device 27 uses one chuck member 3. This chuck device 27 has a simple structure because the chuck device 1 is not provided with the annular member 5, the sensor path 6 and the intermediate collar 16. The chuck device 27 is different from the chuck device 1 in that the annular member 5
Also, the rod-shaped workpiece W can be reliably chucked and the durability of the chuck member 3 is improved, although there is no action by the middle collar 16 and no chuck detection action by the sensor path 6.

The rod-shaped work W may be other than the test tube. Further, the through hole 7 of the main body 2 may have a shape other than the circular shape. Further, the annular member 5 may have a shape other than the circular ring shape. Furthermore, the sensor path 6 and the vacuum path 4 may have a structure other than the above.

[0041]

As is apparent from the above, according to the chuck device for a rod-shaped work according to the present invention (claim 1), the rod-shaped work can be securely chucked and the durability of the chuck member is improved.

According to the chuck device for a rod-shaped workpiece according to the present invention (claim 2), the rod-shaped workpiece hits the main body or the like when the rod-shaped workpiece is inserted into or removed from the chuck member by the annular member. Since it can be prevented, it is possible to prevent the rod-shaped work from being damaged. Further, since the inner diameter of the chuck member becomes larger than the inner diameter of the annular member at the time of releasing the chuck of the rod-shaped workpiece, even if the chuck member and the rod-shaped workpiece are in close contact with each other, the rod-shaped workpiece contacts the annular member and becomes the rod-shaped workpiece. The chuck member can be reliably separated.

Furthermore, according to the chuck device for a rod-shaped work according to the present invention (claim 3), it can be reliably detected whether or not the rod-shaped work is securely chucked. Moreover, according to the chuck device for a rod-shaped workpiece according to the present invention (claim 3), it is possible to detect whether or not a plurality of rod-shaped workpieces are chucked by the chuck member. If it is used as a chuck device of a take-out device for taking out a plurality of rod-shaped works, it can be surely detected whether or not the bar-like works are taken out from the molding machine. As a result, the rod-shaped work is left behind in the molding machine, so that damage or breakage of the mold or the molding machine can be prevented. Particularly, according to the chuck device for a rod-shaped work according to the present invention (claim 3), the sensor paths of the plurality of chuck devices are bundled into one to take out a plurality of rod-shaped works with one sensor. Since the condition can be detected, the manufacturing cost is very low.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of a chuck device for a rod-shaped workpiece of the present invention, and is a cross-sectional view taken along line I-I in FIG.

FIG. 2 is likewise a front view.

FIG. 3 is likewise a partially cutaway side view showing a chuck release state.

FIG. 4 is a partially cutaway side view showing a chuck state.

5A is a cross-sectional view taken along the line VA-VA in FIG.
FIG. 6B is a sectional view taken along line VB-VB in FIG. 4.

FIG. 6 is a front view showing an embodiment of a rod-shaped workpiece extracting device of the present invention.

FIG. 7 is likewise a side view.

FIG. 8 is an explanatory diagram showing a mold open state of the molding machine.

FIG. 9 is an explanatory diagram showing a chucked state of a rod-shaped work.

FIG. 10 is an explanatory diagram showing a state in which a rod-shaped work is taken out.

FIG. 11 is an explanatory diagram showing a discharge state of a rod-shaped work.

FIG. 12A is a cross-sectional view showing a modified example of the chuck device for a rod-shaped workpiece according to the present invention, showing a chuck released state;
(B) is a view on arrow B in (A).

FIG. 13A is a sectional view showing a chuck state, and FIG. 13B is a view on arrow B in FIG. 13A.

FIG. 14A is a sectional view showing a conventional chuck device for a rod-shaped workpiece in a chuck release state, and FIG. 14B is a sectional view taken along line BB in FIG. 14A.

15A is a sectional view showing a chuck state, and FIG. 15B is a sectional view taken along line BB in FIG. 15A.

[Explanation of symbols]

1 Chuck device 2 body 3 Chuck member 4 Vacuum Road 5 annular member 6 sensor roads 7 through holes 8 housing 9 cap 10 holder 11 Press ring 12 O-ring 13 vacuum passage 14 Vacuum connection tube 15 Vacuum piping 16 Medium color 17 sensor passage 18 Sensor connection tube 19 Sensor piping 20 Take-out device 21 Moving member 22 molding machine 23 Work receiving 24 pusher plate 25 Movable mold 26 Fixed mold 27 Chuck device W bar work ZZ ring tube axis OO axis of through hole D1 Inside diameter of chuck member when chucking D2 Inside diameter of chuck member when releasing chuck S space

Claims (3)

[Claims] 1. A main body provided with a through hole having an inner dimension larger than the outer dimension of a rod-shaped workpiece, and a ring tube-shaped elastic member, wherein the axis of the ring tube and the axis of the through hole are substantially the same. A chuck member attached to the main body and arranged in the through hole in a state of being aligned with each other; and a vacuum passage communicating with the inside of the chuck member and connected to a vacuum device. The inner diameter of the chuck member is, in normal times, approximately the same as or smaller than the outer dimension of the rod-shaped work, the rod-shaped work can be chucked, and, when the vacuum device is driven, larger than the outer dimension of the rod-shaped work,
A rod-shaped workpiece chucking device having a size capable of releasing the chucked state of the rod-shaped workpiece. 2. The body protects the rod-shaped work, and when the chuck of the rod-shaped work is released,
An annular member for separating the rod-shaped workpiece and the chuck member is arranged, and the inner dimension of the annular member is larger than the inner dimension of the through hole and the inner diameter of the chuck member when the chuck of the rod-shaped workpiece is released. 2. The chuck device for a rod-shaped workpiece according to claim 1, wherein the chuck device is small and has an outer dimension larger than the outer dimension of the rod-shaped workpiece and an inner diameter of the chuck member when the rod-shaped workpiece is chucked. 3. A plurality of the chuck members are attached to the main body with a gap therebetween, and when the rod-shaped workpiece is chucked, the chuck member is divided by the adjacent chuck members, the main body, and the rod-shaped workpiece. A sensor path connected to a sensor that detects the chucking state of the rod-shaped work is communicated with the space defined by
The chuck device for a rod-shaped workpiece according to claim 1 or 2, wherein.