JP2003071669A - Work supporting device, and work rotating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work supporting device which can support a cylindrical work by a simple structure. SOLUTION: The work supporting device comprises a locking part 3 having a plurality of needle-like rollers 2 attachable/detachable to/from a cylindrical inside diameter surface Wb of the work W, and a rotary cam 4 which performs the cam operation of the locking part 3 in the radial direction. The needle-like rollers 2 are protruded outwardly in the radial direction by the fixed rotational operation of the rotary cam 4, and engaged with the cylindrical inside diameter surface Wb of the work W in a pressing manner from the inner side in the radial direction. The needle-like rollers 2 are retracted inwardly in the radial direction by the disengaging rotational operation of the rotary cam 4, and detached from the cylindrical inside diameter surface Wb of the work W inwardly in the radial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work supporting device and a work rotating device, and more particularly to a work supporting technique for supporting a cylindrical workpiece having a cylindrical inner diameter surface.

[0002]

2. Description of the Related Art Conventionally, in order to rotatably support a cylindrical work (hereinafter, referred to as a work) such as a hub unit of a wheel of an automobile and a bearing, the shape and structure of the work are generally used as a supporting structure. The support structure using is adopted.

For example, a structure is provided in which a concave portion or a screw hole of a work is utilized to rotatably support a drive button or a support bolt by fitting or screwing them, or a cylindrical inner diameter surface or outer diameter of the work. A structure in which a plurality of supporting members are chucked from inside or outside by a plurality of supporting members to rotatably support the surface is generally adopted.

[0004]

However, all such conventional support structures have the following problems, and improvements thereof have been demanded.

That is, the former support structure using the drive bolt and the support bolt cannot be adopted unless the work has a recess or a sub-hole, and it is necessary to manually support the work, which is troublesome. Therefore, there is a problem that it takes time and puts a burden on the worker.

The latter supporting structure for chucking a proper number of positions on the cylindrical inner diameter surface or outer diameter surface of a workpiece with a plurality of supporting members is complicated and expensive for operating the plurality of supporting members, and is automated. It was also difficult.

The present invention has been made in view of such conventional problems, and an object thereof is to provide a cylindrical work with a simple structure regardless of the presence or absence of a recess or a screw hole. It is an object of the present invention to provide a work supporting device that can support a work, and a work rotating device that includes the work supporting device and can support and rotate a work.

[0008]

In order to achieve the above object, a work supporting device of the present invention is a device for supporting a cylindrical work having a cylindrical inner diameter surface, and is a plurality of devices which can be engaged with and disengaged from the cylindrical inner diameter surface of the work. Locking means having a locking member of
And a rotatable cam means for cam-moving the lock member in the radial direction. The fixed rotation operation of the cam means causes the lock member to project outward in the radial direction, so that the cylindrical inner surface of the workpiece is radially extended. It is characterized in that the lock member is engaged in a pressure-contacting manner from the inside, and the lock member is configured to retreat and retract inward in the radial direction from the cylindrical inner diameter surface of the workpiece by the release rotation operation of the cam means.

The following may be adopted as a preferred embodiment. i) The plurality of lock members are in the form of cylindrical rollers that can be engaged with and disengaged from the cylindrical inner diameter surface of the work, and these cylindrical rollers are rotatably and radially arranged in the holding pockets of the annular roller cage. The cam means is in the form of a rotary cam having a plurality of drive cam surfaces provided corresponding to the plurality of cylindrical rollers on the outer periphery, and these cam means are housed so as to be movable in the direction. The surface is a flat inclined surface that cam-moves the cylindrical roller in the radial direction.

Ii) The plurality of locking members are in the form of engaging blocks having engaging surfaces that can be engaged with and disengaged from the cylindrical inner diameter surface of the work, and these engaging blocks hold the annular block cage. Each of the cam means is housed and held in a pocket so as to be movable in the radial direction, and the cam means is in the form of a rotary cam having a plurality of drive cam projections provided on the outer periphery corresponding to the plurality of engagement blocks. .

Iii) The plurality of lock members are in the form of fan-shaped engagement blocks that can be engaged with and disengaged from the cylindrical inner diameter surface of the work, and the cam means are provided on the inner diameter side of these engagement blocks. The cam means is in the form of an elliptical rotary cam whose outer peripheral surface is a drive cam surface that engages with the engagement block.

[0012] Further, preferably, there is provided a turn-around prevention means for preventing the lock means from turning when the cam means rotates.

A work rotating device of the present invention is characterized in that the above-mentioned work supporting device is mounted on a tip end portion of a rotating shaft, and a measuring device for measuring a finished state of an outer peripheral surface of a work is used as the rotating shaft. By selecting a rotary spindle or a workpiece rotary spindle of a machine tool, it can be applied as a workpiece rotating device for various devices.

The work supporting device of the present invention is most suitable for supporting a cylindrical work having a cylindrical inner diameter surface, and the cam means performs fixed rotation operation in a state in which the locking means is located within the cylindrical inner diameter of the work. As a result, the locking member of the locking means cams (projects) outward in the radial direction, and evenly press-contacts the cylindrical inner diameter surface of the work from the inner side in the radial direction, and chucks the entire inner circumference of the work.

On the other hand, when the cam means is released and rotated, the lock member of the lock means cams (retracts) inward in the radial direction, and separates from the cylindrical inner diameter surface of the workpiece inward in the radial direction. The chuck fixed state is released.

In the work rotating device having the work supporting device, it is possible to rotate the cylindrical work while supporting it with a simple structure.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment 1 A work supporting device according to the present invention is shown in FIGS. 1 and 2. The work supporting device 1 is not specifically shown, but a measuring device for measuring a finished state of an outer peripheral surface Wa of a work W. It is attached to the tip of the rotating main shaft (rotating shaft) of the above, and constitutes the work rotating device.

The work supporting device 1 has an optimum structure for supporting a cylindrical work W having a cylindrical inner diameter surface Wb such as a hub unit of a wheel of an automobile or a bearing, and chucks the cylindrical inner diameter surface Wb of the work W. A lock portion (lock means) 3 for fixing and a cam portion (cam means) 4 for chucking the lock portion 3 are mainly configured.

The lock portion 3 has a cylindrical inner diameter surface Wb of the work W.
A plurality of lock members 2, 2, ... Which can be engaged and disengaged are provided as operating members.

The lock members 2, 2, ... Are specifically in the form of cylindrical rollers that can be engaged with and disengaged from the cylindrical inner diameter surface Wb of the work W. In the illustrated embodiment, these cylindrical rollers are provided. A needle roller is used as. The needle rollers 2, 2, ... Are housed and held in the holding pockets 5a, 5a, ... of the annular roller holder 5 so as to be rotatable and movable in the radial direction.

In the roller cage 5 of the illustrated embodiment, the holding pockets 5a, 5a, ... Are provided at equal intervals in the circumferential direction at a pitch of 30 °, whereby the 12 needle rollers 2 are provided. It is arranged.

The specific structure of the holding pocket 5a is such that the needle roller 2 is housed and held from the radially inner side and does not slip out to the radially outer side, whereby the needle roller 2 is Only a part of the cylindrical surface is projectable to the outside of the holding pocket 5a, and is housed and held in the holding pocket 5a so as to be rotatable and movable in the radial direction.

Specifically, the rotary cam 4 cams the lock members 2, 2, ... Of the lock portion 3 in the radial direction, and is in the form of a rotatable cam.

The rotary cam 4 is coaxially mounted and fixed to the tip of the rotary drive shaft 6 by mounting bolts 7, 7, and the rotary drive shaft 6 is concentric with the rotary main shaft (not shown). It is provided so as to be relatively rotatable and is linked to a rotary drive source. The rotary cam 4 may be integrally formed at the tip of the rotary drive shaft 6, and the rotary drive shaft 6 is not linked to the rotary drive source as in the illustrated embodiment, but has a structure for manual operation. May be.

.. are provided on the outer periphery of the rotary cam 4 so as to correspond to the 12 needle rollers 2, 2, ..
The needle rollers 2, 2, ... Are engaged with a, 4a ,.

The driving cam surfaces 4a, 4a, ... Are flat inclined surfaces for cam-moving the needle roller 2 in the radial direction. Specifically, as shown in FIG. By rotating relative to the needle rollers 2, 2, ... Held in the roller cage 5 in the clockwise direction (X direction), the needle rollers 2, 2 ,. By being brought into rolling contact with or sliding contact with, and being guided radially outward, conversely, the rotating cam 4 rotates counterclockwise (Y direction) relative to the needle rollers 2, 2 ,. The needle rollers 2, 2, ... Are configured to be in rolling contact or sliding contact with the drive cam surfaces 4a, 4a ,.

By the fixed rotating operation of the rotating cam 4 (rotating operation in the clockwise direction X in FIG. 1),
The needle rollers 2, 2, ... Of the lock part 3 project outward in the radial direction and engage with the cylindrical inner diameter surface Wb of the work W in a pressure contact manner from the inner side in the radial direction, and the release rotation operation of the rotary cam 4 (FIG. 1
., The needle rollers 2, 2, ... Retreat inward in the radial direction, and separate from the cylindrical inner diameter surface Wb of the work W inward in the radial direction.

Further, in association with the rotation operation of the rotary cam 4, a rotation prevention mechanism (rotation prevention means) 8 for preventing the lock portion 3 from rotating when the rotation cam 4 rotates is provided. Has been.

The entrainment prevention mechanism 8 is specifically
Three elastic springs 8a, 8 provided on the rotating cam 4
, and three needle rollers 2, 2, ... Cooperating with the elastic springs 8a, 8a ,. The elastic springs 8a, 8a, ... Of the twelve driving cam surfaces 4a, 4a ,. , Facing outwardly in the radial direction, so that the needle rollers 2, 2, ... Correspondingly arranged to these drive cam surfaces 4a, 4a, ... By elastic springs 8a, 8a ,. It will always be urged radially outward.

When the lock portion 3 of the work supporting device 1 is positioned inside the inner diameter of the cylinder of the work W, the three needle rollers 2, 2, ... By constantly elastically abuttingly engaging the inner diameter surface Wb, the relative movement of the work W in the circumferential direction is blocked with a predetermined frictional engagement force. As a result, the roller cage 5 and the remaining nine needle rollers 2, 2, ... Through the three needle rollers 2, 2 ,.
Also, as a result of the relative movement in the circumferential direction with respect to the work W being blocked, the lock portion 3 is effectively prevented from rotating together with the rotary cam 4 when the rotary cam 4 rotates.

Further, the entrainment preventing mechanism 8 also functions as a temporary fixing mechanism when the lock portion 3 of the work supporting device 1 is positioned within the cylindrical inner diameter of the work W. That is, the three needle rollers 2, 2, ...
Since the workpiece W is always elastically abuttingly engaged with the cylindrical inner diameter surface Wb of the workpiece W, the workpiece W is temporarily held by the lock portion 3 of the workpiece support device 1. In this temporarily held state, the workpiece W lock portion 3 is held. It is possible to make a positioning adjustment with respect to.

Reference numeral 10 denotes a support plate for mounting and supporting the lock portion 3 on the rotary cam 4. In the support plate 10, the lock portion 3 is inserted and arranged on the outer peripheral portion of the rotary cam 4. In this state, it is fastened and fixed to the tip surface of the rotary cam 4 by the fastening screw 11.

Thus, in the measuring device in which the work supporting device 1 configured as described above is mounted on the tip of the rotary spindle (rotary shaft), the work W is chucked and fixed by the work supporting device 1. Thus, the finished state of the outer peripheral surface Wa of the work W is measured while the rotating main shaft is rotated.

In this case, when the work W is chucked by the work supporting device 1, the work W is held in a state where the lock portion 3 is positioned within the inner diameter of the cylinder of the work W (temporarily fixed support by the rotation prevention mechanism 8). After the positioning adjustment for the lock portion 3 is performed, the rotary cam 4 performs a fixed rotation operation (a rotation operation in the clockwise direction X in FIG. 1). As a result, the needle rollers 2, 2, ...
Performs a cam operation (projection operation) outward in the radial direction, and evenly press-contacts the cylindrical inner diameter surface Wb of the work W from the inner side in the radial direction, and chucks the entire inner circumference of the work W.

On the other hand, when the measurement of the finished state of the outer peripheral surface Wa is completed, the rotating cam 4 is released and rotated (in the counterclockwise direction Y in FIG. 1), the needle roller 2 is rotated. The cams 2 (inward) move inward in the radial direction (withdrawal operation), and are separated from the cylindrical inner diameter surface Wb of the work W inward in the radial direction. As a result, the chuck fixed state is released, and the work W can be removed from the rotary spindle.

In this way, the simple structure of rotating the rotary cam 4 to cam the needle rollers 2, 2, ... Makes the cylindrical inner diameter surface Wb of the work W fast and surely on the rotary shaft. It can be fixed on the chuck. Further, the rotating operation of the rotating cam 4 may be mechanically performed by a drive motor or the like, or may be manually performed. However, when mechanically performing the drive motor or the like, the work W is automatically attached and detached. Can be planned.

Further, by providing the rotation preventive mechanism 8, when the rotary cam 4 is rotated, the lock portion 3 is rotated.
The needle rollers 2, 2, ...
The rotary cam 4 is effectively rotated relative to the lock portion 3 without being rotated together with the lock cam 3, and the chucking operation is performed quickly and reliably.

Embodiment 2 This embodiment is shown in FIGS. 3 and 4, and the work supporting device 21 is, like the first embodiment, a lock portion (locking means) for chuck-fixing the cylindrical inner diameter surface Wb of the work W. 23
And a cam portion (cam means) 24 in the form of a rotary cam for chucking the lock portion 23.

The lock portion 23 is a cylindrical inner diameter surface W of the work W.
A plurality of lock members 22, 22, ... Releasable from the b are provided as operating members. These lock members 22, 22,
... is specifically in the form of an engagement block that can be engaged with and disengaged from the cylindrical inner diameter surface Wb of the work W, and is movable in the radial direction in the holding pockets 25a, 25a, ... of the annular block holder 25, respectively. It is stored and held in.

In the block holder 25 of the illustrated embodiment, the holding pockets 25a, 25a, ... Are provided at equal intervals of 90 ° pitch in the circumferential direction, whereby four engaging blocks 22 are provided. It is arranged.

The outer peripheral surface 22a of the engaging block 22 is an engaging surface that can be engaged with and disengaged from the cylindrical inner diameter surface Wb of the work W.
The engagement surface 22a is formed as a cylindrical surface corresponding to the cylindrical inner diameter surface Wb of the work W. The inner peripheral surface 22b of the engagement block 22 is a driven cam surface that engages with a drive cam projection 24a of the rotary cam 24, which will be described later.
2b is formed on a flat inclined surface, and cooperates with the drive cam projection 24a to cam the engagement block 22 as described later.

Further, as shown in FIG. 4, the holding pocket 2 of the block holder 25 is provided on the inner edge of the engaging block 22.
A retaining flange 30 wider than 5a is formed so that the engaging block 22 can hold the retaining pocket 25a.
Is prevented from falling out in the radial direction. On the other hand, the leaf springs 31 are respectively interposed between both ends of each engagement block 22 and the block retainer 25, whereby the engagement block 22 is always inward in the radial direction of the holding pocket 25a. Bombing has been activated.

Although not specifically shown, the rotary cam 24 is coaxially attached and fixed to the tip of the rotary drive shaft as in the first embodiment, and this rotary drive shaft serves as the rotary main shaft of the rotary device. It is provided concentrically and relatively rotatably, and is linked to a rotary drive source.

Four drive cam protrusions 24a, 24a, ... Are provided on the outer periphery of the rotary cam 4 at 90 ° pitches corresponding to the four engagement blocks 22, 22 ,. The engaging blocks 22, 22, ... Are engaged with the cam protrusions 24a, 24a ,.

These drive cam protrusions 24a, 24a, ...
3 is formed in an arc shape having a cylindrical outer peripheral surface as shown in FIG. 3, and the driven cam surface 22b of the engagement block 22 is
In cooperation with the above, the engaging block 22 is cam-moved in the radial direction.

Specifically, as shown in FIG. 3, the engaging block 2 in which the rotary cam 24 is held by the block holder 25.
By rotating in the clockwise direction (X direction) with respect to 2, 22, ..., The engagement blocks 22, 22, ... Slidably contact the drive cam projections 24a, 24a ,. On the contrary, the rotating cam 24 is engaged with the engaging blocks 22, 2
By rotating counterclockwise (Y direction) with respect to 2, ..., The engagement blocks 22, 22, ... Slidably contact the drive cam projections 24a, 24a ,. It is configured to be guided towards.

Then, by the fixed rotation operation of the rotary cam 24 (rotation operation in the clockwise direction X in FIG. 3),
The engagement blocks 22, 22, ... Of the lock portion 23 project outward in the radial direction to engage with the cylindrical inner diameter surface Wb of the work W in a pressure contact manner from the inner side in the radial direction, and release rotation operation of the rotary cam 24 (FIG. 3 rotation in the counterclockwise direction Y)
As a result, the engaging blocks 22, 22, ... Retreat inward in the radial direction and disengage from the cylindrical inner diameter surface Wb of the work W inward in the radial direction.

Further, similar to the first embodiment, the rotating cam 2
In association with the rotation operation of No. 4, a rotation prevention mechanism (rotation prevention means) 28 that prevents the lock portion 23 from rotating when the rotation cam 24 rotates is provided.

Specifically, the follow-up prevention mechanism 28 is composed of two plungers 29, 29 provided on the block holder 25. These plungers 29, 29 are
The block holders 25 are provided at symmetrical positions on one diameter line.

The plunger 29 is composed of an engagement ball 29a and an elastic spring 29b, and when the lock portion 23 of the work supporting device 21 is located inside the cylindrical inner diameter of the work W, the engagement balls 29a of the two plungers 29, 29 are arranged. Two
The 9a ... Always elastically abut and engage the cylindrical inner diameter surface Wb of the work W, whereby relative movement in the circumferential direction with respect to the work W is prevented with a predetermined frictional engagement force. As a result, the block retainer 25 and the engaging blocks 22, 2 are passed through the plungers 29, 29.
.. are prevented from moving in the circumferential direction relative to the work W, and as a result, the lock portion 23 is effectively prevented from rotating together with the rotary cam 24 when the rotary cam 24 rotates. It

Further, the rotation prevention mechanism 28, like the rotation prevention mechanism 8 of the first embodiment, also serves as a temporary fixing mechanism when the lock portion 23 of the work supporting device 21 is positioned within the cylindrical inner diameter of the work W. To work.

Thus, in the work supporting device 21 configured as described above, the work W is in a state in which the lock portion 23 is positioned within the cylindrical inner diameter of the work W (the condition in which the rotation prevention mechanism 28 temporarily supports the work). After the positioning adjustment for the lock portion 32 of the rotary cam 24 is performed, the rotary cam 24 performs the fixed rotary operation (the rotary operation in the clockwise direction X in FIG. 3).
To do. Thereby, the engaging block 2 of the lock portion 23
, 22 radially outwardly cam (project) to uniformly press-contact the cylindrical inner diameter surface Wb of the work W from the inner side in the radial direction, and chuck the entire inner circumference of the work W.

On the other hand, when the rotary cam 24 performs the releasing rotary operation (rotating operation in the counterclockwise direction Y in FIG. 3), the engaging blocks 22, 22, ... (Inserting operation), and the work W is separated from the inner diameter surface Wb of the cylinder inward in the radial direction. As a result, the chuck fixed state is released, and the work W can be removed from the rotary spindle. Other configurations and operations are similar to those of the first embodiment.

Embodiment 3 This embodiment is shown in FIGS. 5 and 6, and the work supporting device 41 is, like the first embodiment, a lock portion (locking means) for fixing the cylindrical inner diameter surface Wb of the work W by a chuck. 43
And a cam portion (cam means) 44 in the form of a rotary cam for chucking the lock portion 43.

The lock portion 43 is a cylindrical inner diameter surface W of the work W.
A plurality of lock members 42, 42 that can be engaged with and disengaged from b are provided as operating members. These lock members 42, 42 are specifically in the form of fan-shaped engagement blocks that can be engaged with and disengaged from the cylindrical inner diameter surface Wb of the work W.

In this embodiment, two engaging blocks 42, 42 are provided, and they are formed in a substantially semicircular fan shape as shown in FIG. That is, the rotary cam 44 is provided on the inner diameter side.

The outer peripheral surface 42a of the engaging block 42 is an engaging surface that can be engaged with and disengaged from the cylindrical inner diameter surface Wb of the work W,
The engagement surface 42a is formed as a cylindrical surface corresponding to the cylindrical inner diameter surface Wb of the work W. Further, a part 42b of the inner peripheral surface of the engagement block 42 is a driven cam surface that engages with a drive cam surface 44a of a rotary cam 44 described later, and the inner peripheral surface including the driven cam surface 42b is a rotary cam. It is formed in a concave curved surface that accommodates 44. The driven cam surface 42b cooperates with the drive cam surface 44a of the rotary cam 44 to cam the engagement block 42, as described later.

As shown in FIG. 5, a pair of tension springs 50, 50 are interposed between the engagement blocks 42, 42, and the tension forces of the tension springs 50, 50 cause both engagements. The blocks 42, 42 are elastically urged in a direction approaching each other, that is, inward in the radial direction, so that the driven cam surface 4
2b and 42b are always in sliding contact with the drive cam surface 44a of the rotary cam 44.

As shown in FIG. 6, the rotary cam 44 is integrally provided at the tip of the rotary drive shaft 6 as in the first embodiment. The rotary drive shaft 6 is provided in a work rotating device (not shown). The rotary main shaft is concentrically and relatively rotatably provided, and is linked to a rotary drive source.

As described above, the outer peripheral surface 44a of the rotary cam 44 functions as a drive cam surface that slidably engages the driven cam surfaces 42b and 42b of the two engagement blocks 42 and 42, respectively. That is, this drive cam surface has an elliptical contour as shown in FIG. 5, and is structured to cooperate with the driven cam surface 42b of the engagement block 42 to cam the engagement block 22 in the radial direction. There is.

Specifically, the rotation cam 44 is rotated relative to the engagement blocks 42, 42 in the clockwise direction (X direction) from the state shown by the chain double-dashed line in FIG. The blocks 42, 42 slidably contact the drive cam surfaces 44a, 44a and are guided radially outward, and conversely, the rotary cam 44 is
From the state shown by the solid line in FIG. 5, the engaging blocks 42, 42 rotate relative to the engaging blocks 42, 42 in the counterclockwise direction (Y direction), so that the engaging blocks 42, 42 are driven cam surfaces 44 a, 4 a.
It is configured to be slidably contacted with 4a and to be guided inward in the radial direction.

Then, by the fixed rotating operation of the rotating cam 44 (rotating operation in the clockwise direction X in FIG. 5),
The engaging blocks 42, 42 of the lock portion 43 project outward in the radial direction to engage with the cylindrical inner diameter surface Wb of the work W in a pressure-contact manner from the inner side in the radial direction, and release rotation operation of the rotary cam 44 (see FIG. 5). By the rotation operation in the counterclockwise direction Y), the engagement blocks 42, 42 retreat inward in the radial direction,
The work W is separated from the inner diameter surface Wb of the cylinder W in the radial direction.

Reference numeral 60 denotes a support plate for mounting and supporting the lock portion 3 on the rotary cam 44. The support plate 60 is attached and fixed to the bottom surfaces of both engagement blocks 42, 42. There is.

Further, as in the first embodiment, the rotary cam 4 is
In association with the rotation operation of No. 4, a rotation prevention mechanism (rotation prevention means) 48 for preventing the lock portion 43 from rotating when the rotation cam 44 rotates is provided.

This rotation prevention mechanism 48 is specifically made up of two plungers 49, 49 provided on the engagement blocks 42, 42, respectively, as in the second embodiment.
These plungers 49, 49 are the tension springs 50,
It is provided at a symmetrical position parallel to 50.

The plunger 49 is composed of an engaging ball 49a and an elastic spring 49b, and when the lock portion 43 of the work supporting device 41 is located within the inner diameter of the cylinder of the work W, the engaging balls 49a of the two plungers 49, 49 are formed. Four
Since 9a constantly and elastically abuts and engages with the cylindrical inner diameter surface Wb of the work W, relative movement in the circumferential direction with respect to the work W is prevented with a predetermined frictional engagement force. As a result, the engagement blocks 42, 42 are prevented from moving relative to the workpiece W in the circumferential direction via the plungers 49, 49, and as a result, the rotary cam 44 is moved.
It is possible to effectively prevent the lock portion 43 from being rotated together with the rotation cam 44 during the rotation operation of.

Further, the turn-around prevention mechanism 48 is similar to the turn-around prevention mechanism 48 of the first embodiment in that the work support device 41 is provided.
Also functions as a temporary fixing mechanism when the lock portion 43 is positioned within the cylindrical inner diameter of the work W.

Thus, in the work supporting device 41 configured as described above, the work W is in a state in which the lock portion 43 is located within the inner diameter of the cylinder of the work W (the temporary fixing support state by the rotation prevention mechanism 48). After the positioning adjustment is performed on the lock portion 43, the rotation cam 44 performs a fixed rotation operation (rotation operation in the clockwise direction X in FIG. 5).
To do. As a result, the engagement block 4 of the lock portion 43 is
The cams 2 and 42 cam (project) outward in the radial direction, and evenly press-contact with the cylindrical inner diameter surface Wb of the work W from the inner side in the radial direction to chuck and fix the entire inner circumference of the work W.

On the other hand, the engagement cams 42, 42 are cam-operated (retracting motion) inward in the radial direction by the releasing cam rotating motion (rotating motion in the counterclockwise direction Y in FIG. 5) of the rotary cam 44. ) And the cylindrical inner surface Wb of the workpiece W
From the inside in the radial direction. As a result, the chuck fixed state is released, and the work W can be removed from the rotary spindle. Other configurations and operations are similar to those of the first embodiment.

The first to third embodiments described above are merely preferred embodiments of the present invention, and the present invention is not limited to this, and various design changes are possible within the scope thereof. .

For example, in the illustrated embodiment, the case where the work supporting devices 1, 21, 41 are provided on the rotary spindle of the measuring device for measuring the finished state of the outer peripheral surface Wa of the work W has been explained. It can be widely applied to various types of rotary shafts such as a rotary main shaft.

[0073]

As described above in detail, according to the work supporting apparatus of the present invention, the locking means having a plurality of locking members which can be engaged with and disengaged from the cylindrical inner diameter surface of the work, and the locking members are cammed in the radial direction. And a rotatable cam means to be operated, and by the fixed rotation operation of the cam means, the lock member projects outward in the radial direction and engages with the cylindrical inner diameter surface of the workpiece in a pressure contact manner from the inner side in the radial direction. At the same time, the unlocking operation of the cam means causes the lock member to retreat inward in the radial direction and separate from the cylindrical inner diameter surface of the workpiece inward in the radial direction. In addition, it can be supported with a simple structure regardless of the presence or absence of the recess or the screw hole.

That is, when the lock means is positioned within the inner diameter of the cylinder of the work, the cam means performs fixed rotation operation, whereby the lock member of the lock means cams (projects) radially outward. Then, the entire inner circumference of the work is chuck-fixed by uniformly pressing the inner diameter surface of the work from the inner side in the radial direction. On the other hand, on the contrary, when the cam means performs the releasing rotation operation, the lock member of the locking means cams (retracts) inward in the radial direction, and moves radially inward from the cylindrical inner diameter surface of the workpiece. The chuck is released and the chuck fixed state is released.

As described above, with the simple structure, the work supporting device can chuck the work quickly and surely, and at the same time, the mounting / removing of the work to / from the work supporting device can be automated. The burden on the person can also be reduced.

Further, in the work rotating device provided with the above-mentioned work supporting device, since the above-mentioned effects are obtained, it becomes possible to rotate the cylindrical work while supporting it with a simple structure.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration of a work supporting device according to a first embodiment of the present invention, taken along line I-I in FIG.

FIG. 2 is a side view showing a partially cut-away view of the structure of the work supporting device.

FIG. 3 is a plan view showing a configuration of a work supporting device according to a second embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view showing a main part configuration of the work supporting device, taken along line IV-IV in FIG. 3.

FIG. 5 is a plan view showing a configuration of a work supporting device according to a third embodiment of the present invention.

[Fig. 6] Similarly, the structure of the work supporting device is VI-VI of Fig. 5.
It is sectional drawing shown along a line.

[Explanation of symbols]

W Work Wa Outer peripheral surface of work Wb Cylindrical inner diameter surface of work 1 Work support device 2 Needle roller (lock member, cylindrical roller) 3 Lock part (locking means) 4 Rotating cam (cam means) 4a Driving cam surface of rotating cam 5 Roller cage 5a Holding pocket 6 Rotational drive shaft 8 Entrainment prevention mechanism (entrainment prevention means) 21 Work support device 22 Engagement block (lock member) 22a Engagement surface 22b of engagement block Driven cam surface of engagement block 23 Locking Part (Locking Means) 24 Rotating Cam (Cam Means) 24a Driving Cam Protrusion of Rotating Cam 25 Block Holder 25a Holding Pocket 28 Rotation Prevention Mechanism (Trotation Prevention Mechanism) 29 Plunger 41 of Rotation Prevention Mechanism Work Support Device 42 engagement block (lock member) 42a engagement surface 42b of engagement block driven cam surface of engagement block 3 locking portion (locking means) 44 rotates the cam plunger (cam means) 44a drive cam surface 48 Child around preventive mechanism of the rotary cam (accompanying rotation preventing means) 49 Child around prevention mechanism

Claims (5)

[Claims] 1. A device for supporting a cylindrical workpiece having a cylindrical inner diameter surface, comprising: locking means having a plurality of locking members that can be engaged with and disengaged from the cylindrical inner diameter surface of the workpiece; and cam the locking member in the radial direction. And a rotatable cam means for operating the lock means, the lock member protruding outward in the radial direction by the fixed rotation operation of the cam means, and engaging with the cylindrical inner diameter surface of the work piece from the inner side in the radial direction with pressure contact. In addition, the work supporting device is configured such that the lock member is configured to retreat and retract inward from the cylindrical inner diameter surface of the workpiece by the releasing and rotating operation of the cam means. 2. The work supporting device according to claim 1, further comprising a turn-around prevention unit that prevents the lock unit from turning when the cam unit rotates. 3. The plurality of lock members are in the form of cylindrical rollers that can be engaged with and disengaged from the cylindrical inner diameter surface of a workpiece, and these cylindrical rollers rotate in respective holding pockets of an annular roller cage. The cam means is a rotary cam having a plurality of drive cam surfaces provided corresponding to the plurality of cylindrical rollers on the outer periphery, and is stored and held so as to be movable in the radial direction. 3. The work supporting device according to claim 1, wherein the drive cam surfaces are flat inclined surfaces that cam-moves the cylindrical rollers in the radial direction. 4. The plurality of locking members are in the form of engaging blocks having engaging surfaces that can be engaged with and disengaged from the cylindrical inner diameter surface of a workpiece, and these engaging blocks are of an annular block retainer. Each of the cam means is movably supported in the holding pocket in the radial direction, and the cam means is in the form of a rotary cam having a plurality of drive cam protrusions provided on the outer periphery corresponding to the plurality of engagement blocks. The work supporting device according to claim 1 or 2, wherein 5. The plurality of lock members are in the form of fan-shaped engagement blocks that can be engaged with and disengaged from the cylindrical inner diameter surface of a workpiece, and the cam means are provided on the inner diameter side of these engagement blocks. The work support according to claim 1 or 2, wherein the cam means is in the form of an elliptical rotary cam whose outer peripheral surface is a drive cam surface that engages with the engagement block. apparatus.