JP3016765B2 - Work table - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work table, and more particularly, to a work table for holding a work for performing positioning, transport, and the like when processing the work.

[0002]

2. Description of the Related Art In general, a table for mounting and holding a predetermined work is provided. By rotating this table, the work is positioned at a predetermined rotation position. A work table is used for mounting components, processing, etc., and for transporting a work.

[0003] In a conventional work table, there is a work table that is driven to rotate by a motor.

[0004] However, such a conventional work table has a problem that the control of the motor becomes complicated when controlling the rotation angle of the table.

Therefore, conventionally, an air cylinder is used as a drive source for rotating and driving the table plate, and the piston is linearly reciprocated by operating the air cylinder, and the linear movement of the piston is controlled by a rack and a pinion mechanism. There is a type in which a table plate is driven to rotate by converting the rotation into a rotary motion through a motor.

In this case, since the table plate is normally rotated in one direction, the table plate is rotated when the piston is moved, and the table plate is not rotated when the piston is returned. An intermittent mechanism is provided for the purpose.

[0007]

However, since the conventional work table has a structure in which the piston is linearly moved by the air cylinder, a mechanism for rotating the table plate becomes large, and the work table of the apparatus becomes large. There is a problem that miniaturization cannot be achieved. In addition, since the linear motion is converted into the rotary motion, there is a problem that the rotation accuracy is poor and the positioning accuracy of the work is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is intended for a work capable of improving the rotation accuracy of a table plate, increasing the positioning accuracy of a work, and reducing the size of the apparatus. It is intended to provide a table.

[0009]

In order to achieve the above object, a work table according to the first aspect of the present invention is provided with a table plate for mounting and holding a work on an upper portion of a case main body, the table plate being rotatable. An annular cylinder is disposed inside the case body, and an arc-shaped driving plate is disposed inside the cylinder so as to be reciprocally movable inside the cylinder by a fluid supplied to the cylinder. A rotating plate which is rotated by the movement is provided, and a ratchet mechanism for intermittently rotating the table plate is provided on the rotating plate.

According to the first aspect of the present invention, an annular cylinder is provided in the case main body, and the rotary plate is rotated by a driving plate which reciprocates inside the cylinder by feeding a fluid. The rotation of the moving plate allows the table plate to rotate intermittently via the ratchet mechanism, so that the rotation of the table plate can be performed smoothly, and the control is easy, and the rotation of the table plate is easy. Accuracy can be significantly increased. In addition, since the annularly provided cylinder is used inside the case body, there is no need to provide a separate space for installing the cylinder, and the device can be downsized.

The invention described in claim 2 is the first invention.
In the above, the ratchet mechanism, and a ratchet gear integrally formed with the table plate, while meshing with the ratchet gear during the feeding operation of the rotating plate,
And a ratchet lever that is released during the return operation.

According to the second aspect of the present invention, at the time of the feeding operation of the rotating plate, the ratchet lever is meshed with the ratchet gear to rotate the table plate with the rotation of the rotating plate. At the time of the return operation of the rotating plate, by releasing the engagement between the ratchet lever and the ratchet gear, only the rotating plate can be returned, and the table plate can be reliably rotated intermittently.

According to a third aspect of the present invention, in the first or second aspect, a stopper mechanism for holding the table plate when the rotating plate is returned is provided. .

According to the third aspect of the present invention, since the stopper mechanism is provided, the table plate can be held at a predetermined rotational position when the rotary plate returns, and the positioning can be performed. Accuracy can be increased.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.

FIGS. 1 to 4 show an embodiment of a work table according to the present invention, in which a central plate 2 is integrally provided inside a cylindrical case body 1. An arc-shaped driving opening 3 having a central angle of at least 90 ° or more in the circumferential direction is formed around the central plate 2. An upper recess 4 is formed in the center of the center plate 2, and a center hole 5 is formed in the center of the upper recess 4. Further, an annular upper cylinder groove 6 having a semicircular cross section is formed on the outer peripheral side of the lower surface of the central plate 2.
Are formed.

A bottom plate 7 is attached to the lower surface of the case body 1, and a bottom plate center hole 8 is formed in the center of the bottom plate 7. An annular lower cylinder groove 9 having a semicircular cross section is formed on the outer peripheral side of the upper surface of the bottom plate 7.
The upper cylinder groove 6 of the central plate 2 and the lower cylinder groove 9 of the bottom plate 7 are joined in a state in which the bottom plate 7 is attached to the case main body 1 to form a cylinder 10 having a circular cross section. Is formed.

A driving plate 11 having an arc shape is provided inside the cylinder 10 so as to be movable along the circumferential direction of the cylinder 10. A feed piston is provided at both ends of the driving plate 11. The member 12 and the return piston member 13 are respectively fixed. The cylinder 1
0, and between the piston members 12 and 13, a partition plate 14 is fixed by a support pin 15 extending upward through the partition plate 14.
4, a feed air supply groove 16 and a return air supply groove 17 extending in the radial direction from the center toward the outer peripheral side of the case body 1 are formed, respectively. On the outer peripheral surface of the case body 1, a feed air supply port 18 communicating with the feed air supply groove 16 of the partition plate 14 and a return air supply port communicating with the return air supply groove 17. 1
The air supply ports 18 and 19 have a supply air supply nozzle and a return air supply nozzle (both not shown) connected to an air supply device (not shown). It can be attached.

Then, air is supplied between the partition plate 14 and the feed piston member 12 from the feed air feed nozzle through the feed air feed port 18 and the feed air feed groove 16. As a result, the feed piston member 12 is moved clockwise in FIG. 1 along the inner peripheral surface of the cylinder 10, whereby the drive plate 11 is moved in the same direction. Further, by supplying air between the partition plate 14 and the return piston member 13 from the return air supply nozzle via the return air supply port 19 and the return air supply groove 17, Return piston member 13
Are moved counterclockwise in FIG. 1 together with the drive plate 11.

A drive pin 20 extending upward is mounted on the upper surface of the drive plate 11, and the drive pin 20 is located inside the drive opening 3 of the center plate 2.

On the upper surface of the central plate 2, a disk-shaped rotating plate 21 is rotatably arranged via a spacer 22 located in the upper concave portion 4. Is provided with a turning plate center hole 23. Further, on the outer peripheral side of the rotating plate 21, a driving long hole 24 is formed.
Further, a stopper opening 25 is formed on the outer peripheral side of the rotating plate 21.

At the upper end of the drive pin 20, a drive roller 26 located inside the drive slot 24 is attached, and near the drive slot 24 of the rotating plate 21 is mounted. , A ratchet lever 2 constituting a ratchet mechanism
7 is provided rotatably about the ratchet support pin 28. The ratchet lever 27 has a roller engaging portion 29 that engages with the driving roller 26 and has a ratchet pawl 30.

Further, on the upper part of the case body 1, a flange part 32 formed by projecting the outer peripheral edge of the table plate 31 downward is engaged with a small diameter part 33 formed on the outer periphery of the upper part of the case body 1. In the center of the lower surface of the table plate 31, a rotating shaft 34 extending to the lower surface side of the bottom plate 7 through the center hole 23, the center hole 5, and the central hole 8 of the bottom plate is fixed. Have been. The table 31 is rotatable about the rotation shaft 34.

On the lower surface of the table plate 31, a ratchet gear 35 constituting a ratchet mechanism with which the ratchet pawl 30 of the ratchet lever 27 is engaged is provided with a rotating shaft 34.
The ratchet gear 35 is mounted coaxially with
An engagement protrusion 36 is formed on the lower surface of the. The engaging projection 36 is adapted to be engaged with the central hole 23 of the rotary plate 21 of the rotary plate 21. The table plate 31, the ratchet gear 35 and the rotary plate 21 All are driven to rotate coaxially as a center.

On the upper surface of the center plate 2 of the case body 1, a disk-shaped fixing plate 37 located on the lower surface side of the rotary plate 21 is fixed. A fixed block 38 is attached to the inside of the stopper opening 25 of the rotating plate 21. This fixed block 38
A lever support plate 39 which has a substantially fan shape and is engaged with the upper end of the support pin 15 is attached to the upper surface of
The lever support plate 39 is formed with a stopper guide groove 40 extending in the radial direction and having an open inner peripheral end. A stopper 41 is provided inside the stopper guide groove 40 so as to be able to advance and retreat in the radial direction along the stopper guide groove 40, and a drive hole 42 is formed in the stopper 41. When the stopper 41 is moved inward in the radial direction, the distal end of the stopper 41 is engaged with the ratchet gear 35. Further, a spring receiving hole 43 extending in the radial direction is formed in one end of the lever support plate 39, and extends in the circumferential direction on the outer peripheral side of the other end of the lever support plate 39. A spring receiving hole 44 is formed. Each of these spring receiving holes 43,
Springs 45 and 46 are provided inside 44, respectively.

Further, a stopper drive lever 47 is provided on the lower surface side of the lever support plate 39 so as to be rotatable around the support pin 15. One end of the stopper drive lever 47 is provided with the lever drive lever 47. The urging pin 4 inserted into the spring accommodating hole 43 of the support plate 39 and urged by the spring 45
8 are protruded. The stopper drive lever 4
A driving pin 49 that is engaged with the driving hole 42 of the stopper 41 projects from the other end of the stopper 7, and a lever pressing portion 50 is formed on the outer edge of the stopper driving lever 47. At the other end of the stopper driving lever 47.
A locking portion 51 is formed. The stopper drive lever 47 always biases the stopper drive lever 47 counterclockwise in FIG. 3 by biasing the biasing pin 48 of the stopper drive lever 47 with a spring 45. ing. Further, a pushing member 52 for pushing the lever pushing portion 50 of the stopper driving lever 47 when the rotating plate 21 is rotated by a predetermined angle is mounted on the upper surface of the rotating plate 21.

On the upper surface of the central plate 2, a supporting plate 53 for locking is arranged movably in the circumferential direction, and the supporting pin 15 is provided inside the supporting plate 53 for locking. A long hole 54 and a support hole 55 to be engaged with each other are formed. The locking plate 5 is provided above the locking support plate 53.
6 are provided at the lower end edge of the locking plate 56. Two engaging members are respectively engaged with the supporting holes 55 of the locking supporting plate 53 and the supporting holes 57 formed in the fixing plate 37. Stop projections 58, 58 are formed. On the upper edge of the locking support plate 53, there is provided a biasing projection 59 disposed inside the spring receiving hole 44 of the lever support plate 39 and biased by the spring 46 so as to be positioned on the stopper drive lever 47 side. Is formed. Further, the locking support plate 53 has a locking hole 60 with which the locking portion 51 of the stopper drive lever 47 is engaged.
Are formed, and a magnet 61 is attached to an end of the support plate 53 for locking.

Further, on the upper surface of the central plate 2 and on the lower surface of the rotary plate 21, there is provided a suction plate 62 having a fan shape and one end of which is attracted to the magnet 61 by its magnetic force. The suction plate 62 is engaged with the drive pin 20 and is moved together with the drive pin 20.

A stopper mechanism is constituted by the lever supporting plate 39, the stopper driving lever 47, the stopper 41, the locking plate 56, the locking supporting plate 53, and the like. The locking portion 51 of the stopper driving lever 47 is engaged with the locking hole 60 of the support plate 53 for use, and the magnet 61 is attracted to the suction plate 62 by the suction plate 62 moving in the circumferential direction. Stop support plate 5
3 moves in the circumferential direction, whereby the locking plate 56 is rotated about the locking projection 58 supported by the support hole 57 of the fixing plate 37, and locked with the locking portion 51 of the stopper driving lever 47. The engagement of the support plate 53 with the locking hole 60 is released.

Next, the operation of the present embodiment will be described.

First, in the initial state, the locking portion 51 of the stopper driving lever 47 is engaged with the locking hole 60 of the locking support plate 53, and the stopper 41 is moved inward by the stopper driving lever 47. And is meshed with the ratchet gear 35 so that the table plate 31 is held so as not to rotate. At this time, the feed piston member 12 is located closest to the partition plate 14.

In this state, a predetermined work (not shown) is transferred to the upper surface of the table plate 31 or a predetermined processing is performed on the work.

Then, air is supplied between the partition plate 14 and the feed piston member 12 from the feed air feed nozzle via the feed air feed port 18 and the feed air feed groove 16. As a result, the feed piston member 12 is moved clockwise along the inner peripheral surface of the cylinder 10, whereby the drive plate 11 is moved clockwise to perform the feed operation.

In this case, the state shown in FIG.
When the movement of the driving plate 11 is started, the driving pin 20 moves inside the driving elongated hole 24 of the rotating plate 21, and the driving roller 26 of the driving pin 20 moves the roller engaging portion 29 of the ratchet lever 27. Push. Thereby, as shown in FIG. 5B, the ratchet lever 27 is rotated clockwise, and the ratchet pawl 30 of the ratchet lever 27 is engaged with the ratchet gear 35.

On the other hand, since the suction plate 62 is also moved with the movement of the drive pin 20, the magnet 61 is
2 and the locking support plate 53 is slightly moved in the circumferential direction, whereby the locking plate 56 is rotated around the locking projection 58 supported by the support hole 57 of the fixed plate 37,
Locking portion 51 of stopper drive lever 47 and locking support plate 5
The engagement with the locking hole 60 is released. When the engagement is released, the stopper driving lever 47 is rotated counterclockwise by the urging force of the spring 45, and the stopper 41 is moved outward as shown in FIG.
And the ratchet gear 35 are disengaged from each other.

After that, by the movement of the drive pin 20, the drive pin 20 pushes the inner edge of the drive elongated hole 24 of the turn plate 21, whereby the turn plate 21 is turned. 5 (c), the ratchet lever 27 is moved, so that the ratchet gear 35 with the ratchet pawl 30 engaged is also rotated, and the table plate 31 is rotated by a predetermined angle. In this case, the drive plate 11 is moved until the return piston member 13 approaches the partition plate 14, and the table plate 31 is also moved according to the amount of movement of the drive plate 11. is there. In the present embodiment, the table plate 31 is moved with a rotation angle of 90 °.

When the rotating plate 21 is moved, the pushing member 52 is moved to the lever pushing portion 50 of the stopper driving lever 47.
As a result, the stopper driving lever 47 is rotated clockwise against the urging force of the spring 45, and the locking portion 51 of the stopper driving lever 47 is locked by the locking hole 60 of the locking plate 56.
Is engaged. At this time, since the locking plate 56 is biased by the biasing force of the spring 46 so as to be positioned on the stopper driving lever 47 side, the rotation of the stopper driving lever 47 causes the locking portion 51 and the locking hole 60 to rotate. Can be engaged. The rotation of the stopper drive lever 47 causes the stopper 41 to protrude inward. As shown in FIG. 4, the stopper 41 is engaged with the ratchet gear 35, and the position of the table plate 31 is maintained.

Thereafter, air is supplied between the partition plate 14 and the return piston member 13 from the return air supply nozzle through the return air supply port 19 and the return air supply groove 17. Then, the return piston member 13 is moved together with the drive plate 11 in the counterclockwise direction in the figure, and the return operation is performed.

In this case, the state shown in FIG.
When the movement of the driving plate 11 is started, the driving pin 20 moves inside the driving elongated hole 24 of the rotating plate 21, and the driving roller 26 of the driving pin 20 moves the roller engaging portion 29 of the ratchet lever 27. Pushing the ratchet lever 2
7 is turned counterclockwise, and the ratchet pawl 30 of the ratchet lever 27 is separated from the ratchet gear 35 as shown in FIG. After that, the movement of the drive pin 20 causes the drive pin 20 to move to the drive slot 2 of the rotating plate 21.
By pressing the inner edge of the rotating plate 4, only the rotating plate 21 is rotated counterclockwise as shown in FIG.
The state is returned to the initial state as shown in FIG. In this case, since the stopper 41 is engaged with the ratchet gear 35 when the rotating plate 21 returns, the table plate 31 does not move.

By repeatedly performing the above operations, the table plate 31 can be rotationally driven in one direction by a predetermined angle, and the mounting, processing, or transporting of a component to the work can be performed.

Therefore, in the present embodiment, an annular cylinder 10 is provided in the case body 1, and the rotary plate 21 is rotated by the driving plate 11 which reciprocates inside the cylinder 10 by air supply. The rotation of the rotation plate 21 causes the table plate 31 to rotate intermittently via the ratchet mechanism, and at the time of the return operation of the drive plate 11 and the rotation plate 21, causes the stopper 41 to move the ratchet gear 3.
5, the table plate 31 is held at a predetermined rotational position.
Can be smoothly performed, the control is easy, and the rotation accuracy of the table plate 31 can be significantly improved. In addition, since the cylinder 10 provided annularly along the inside of the case body 1 is used, the cylinder 1
Therefore, it is not necessary to provide a separate installation space, and the size of the apparatus can be reduced.

FIGS. 6 to 12 show a second embodiment of the present invention. In the present embodiment, similarly to the above-described embodiment, the drive long hole 24 of the rotary plate 21 is formed. In the vicinity, a ratchet lever 27 that constitutes a ratchet mechanism is rotatably disposed about a ratchet support pin 28. The ratchet lever 27 has a roller engaging portion 29 that engages with the driving roller 26, Each of the ratchet pawls 30 has a ratchet claw 30 meshed with the ratchet gear 35. Further, in the present embodiment, a locking groove 65 is formed at the distal end of the ratchet lever 27, and an operating arm 66 is formed to extend at the base end side of the ratchet lever 27. I have.

The driving slot 2 of the rotating plate 21
In the vicinity of 4, a locking plate 67 is disposed rotatably about a pin 68. The locking plate 67 is engaged with the ratchet gear 35 together with the ratchet pawl 30 of the ratchet lever 27. A claw 69 is formed. The upper surface of the locking plate 67 is engaged with the locking groove 65 of the ratchet lever 27 and the locking plate 6.
A locking lever 70 that rotates together with the lock 7 is attached. When the ratchet pawl 30 of the ratchet lever 27 does not mesh with the ratchet gear 35, as shown in FIG.
Then, the locking groove 65 of the ratchet lever 27 is locked so that the ratchet pawl 30 of the ratchet lever 27 is held so as not to mesh with the ratchet gear 35, and the locking plate 67 rotates as shown in FIG. Claw portion 69 of this locking plate 67
Is meshed with the ratchet gear 35, the locking lever 70 is also rotated, and the locking lever 70 can enter the locking groove 65 of the ratchet lever 27. In this state, the ratchet lever 27 Ratchet claw 3
0 can mesh with the ratchet gear 35.

On the upper surface of the center plate 2 of the case body 1, a fixed plate 37 located on the lower surface side of the rotating plate 21 is fixed.
A stopper lever 71 is disposed inside the one stopper opening 25 so as to be rotatable around a support pin 72. The stopper lever 71 is formed with a stopper claw 73 that meshes with the ratchet gear 35, and a locking step 74 is formed at the tip of the stopper lever 71. Further, a spring pressing arm 75 is formed on the base end side of the stopper lever 71.

Further, a sub-stopper lever 76 is provided on the fixing plate 37 so as to be rotatable about a support pin 77. The sub-stopper lever 76 is provided with a locking step of the stopper lever 71. A locking claw 78 to be engaged with the portion 74 is formed, and the ratchet lever 2
An operating protrusion 79 is formed to be in contact with the operating arm 66 of FIG. A spring pressing portion 80 is formed on the sub-stopper lever 76, and an urging spring 81 is interposed between the spring pressing portion 80 and the spring pressing arm 75 of the stopper lever 71. I have.

Further, a magnet 82 is provided on the upper surface of the rotary plate 21 at a position corresponding to the sub-stopper lever 76, and the magnet 82 allows the rotary plate 21 and the sub-stopper lever 76 Are attracted by the magnetic force.

The other configuration is the same as that of the above-described embodiment, and therefore, the same portions are denoted by the same reference numerals and description thereof will be omitted.

Next, the operation of the present embodiment will be described.

In this embodiment, similarly to the above-described embodiment, the partition plate 14 and the feed piston member 12 are connected to each other through the feed air feed port 18 and the feed air feed groove 16 from the feed air feed nozzle. By sending air during
The feed piston member 12 is moved clockwise along the inner peripheral surface of the cylinder 10, whereby the drive plate 11 is moved clockwise to perform a feed operation.

In this embodiment, when the movement of the drive plate 11 is started from the state shown in FIG. 9, the drive pin 20 moves inside the drive elongated hole 24 of the rotary plate 21,
The drive roller 26 of the drive pin 20 slightly pushes the roller engagement portion 29 of the ratchet lever 27. As a result, the ratchet lever 27 is rotated clockwise as shown in FIG. 35.

On the other hand, when the ratchet lever 27 is rotated, the operating arm 66 of the ratchet lever 27 pushes the operating projection 79 of the sub-stopper lever 76, and the sub-stopper lever 76 rotates counterclockwise. As a result, the engagement between the locking claw 78 of the sub-stopper lever 76 and the locking step 74 of the stopper lever 71 is released. The urging force of the urging spring 81 causes the stopper lever 71
The spring pressing arm 75 is pressed, and the stopper lever 71
Is rotated in the counterclockwise direction.
Is disengaged from the ratchet gear 35.

At this time, since the rotating plate 21 and the sub-stopper lever 76 are attracted by the magnet 82, the driving pin 20 moves inside the long driving hole 24 of the rotating plate 21 to move the driving roller 26. Is slightly pressed on the roller engaging portion 29 of the ratchet lever 27, the rotating plate 21 is held in a state where it does not rotate.

After that, by the movement of the drive pin 20, the drive pin 20 pushes the inner edge of the drive elongated hole 24 of the turn plate 21, whereby the turn plate 21 is turned. As shown in FIG. 11, since the ratchet lever 27 is moved, the ratchet gear 35 engaged with the ratchet pawl 30 is also rotated, and the table plate 31 is rotated by a predetermined angle.

When the rotating plate 21 is moved, the pushing member 52 pushes the spring pressing arm 75 of the stopper lever 71, and as shown in FIG. The stopper lever 71 is rotated clockwise against the urging force of 81, and the stopper pawl 73 of the stopper lever 71 is engaged with the ratchet gear 35. By the rotation of the stopper lever 71, the biasing spring 81 contracts, and the biasing force acts on the spring pressing portion 80 of the sub-stopper lever 76,
The sub-stopper lever 76 is rotated clockwise, whereby the locking claw 78 of the sub-stopper lever 76 is engaged with the locking step 74 of the stopper lever 71, and the stopper claw 73 of the stopper lever 71 is moved to the ratchet gear. The gear 35 is held in a meshed state.

Thereafter, air is supplied from the return air supply nozzle through the return air supply port 19 and the return air supply groove 17 to between the partition plate 14 and the return piston member 13. Then, the return piston member 13 is moved in the counterclockwise direction together with the drive plate 11, and the return operation is performed.

Then, when the movement of the drive plate 11 is started by the return operation, the drive pin 20 moves inside the drive elongated hole 24 of the rotary plate 21, and the drive roller 26 of the drive pin 20 moves the ratchet lever. By pushing the roller engaging portion 29 of the ratchet lever 27, the ratchet lever 27 is rotated counterclockwise, and the ratchet pawl 30 of the ratchet lever 27 is rotated.
Is separated from the ratchet gear 35. Then, by the movement of the drive pin 20, the drive pin 20 pushes the inner end edge of the drive elongated hole 24 of the rotation plate 21, and the rotation plate 21
Only the counterclockwise direction is rotated and returned to the initial state. In this case, when the rotating plate 21 returns, the stopper pawl 73
Are meshed with the ratchet gear 35, so that the table plate 31 does not move.

By repeatedly performing the above operations, the table plate 31 can be driven to rotate at a predetermined angle in one direction, and the mounting, processing, or transporting of components on the work can be performed.

Therefore, in the present embodiment, similarly to the above-described embodiment, the rotary plate 21 is rotated by the driving plate 11 which reciprocates inside the cylinder 10 by the supply of air. As a result, the table plate 31 is intermittently rotated via the ratchet mechanism, and the stopper pawl 73 of the stopper lever 71 is moved to the ratchet gear 35 when the driving plate 11 and the rotating plate 21 return.
, The table plate 31 is held at a predetermined rotation position, so that the rotation operation of the table plate 31 can be performed smoothly, the control is easy, and the rotation accuracy of the table plate 31 is improved. Can be significantly increased. In addition, since the cylinder 10 provided annularly along the inside of the case body 1 is used, the cylinder 10
There is no need to separately provide an installation space for the device, and the size of the device can be reduced. Furthermore, in this embodiment, the number of components can be reduced as compared with the above embodiment, the structure is simple, the assembly is easy, and the manufacturing can be performed at low cost.

In each of the above embodiments, means for rotating the rotating plate 21 via the driving plate 11 is provided.
Although the air is supplied, for example, the rotation operation may be performed using various fluids such as oil.

The present invention is not limited to the above-described embodiment, and can be variously modified as needed.

[0061]

As described above, in the work table according to the first aspect of the present invention, the ratchet mechanism is rotated by rotating the rotating plate by supplying fluid to the annular cylinder in the case body. Since the table plate is rotated intermittently via the intermediary, the rotation operation of the table plate can be smoothly performed, the control is easy, and the rotation accuracy of the table plate can be significantly improved. In addition, since the annularly provided cylinder is used inside the case body, there is no need to provide a separate space for installing the cylinder, and the device can be downsized.

According to the second aspect of the present invention, the ratchet lever and the ratchet gear are engaged and released during the feed operation or the return operation of the rotating plate, so that the table plate can be reliably rotated intermittently. Can work.

According to the third aspect of the present invention, since the stopper mechanism is provided, the table plate can be held at a predetermined rotation position during the return operation of the rotary plate, and the positioning accuracy can be improved. And the like.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a work table according to the present invention.

FIG. 2 is an exploded perspective view showing a part of the work table of the present invention shown in FIG.

FIG. 3 is a plan view showing a rotating operation state of a ratchet gear in the work table of the present invention shown in FIG. 1;

FIG. 4 is a plan view showing a holding state of a ratchet gear in the work table of the present invention shown in FIG. 1;

5 (a), 5 (b), 5 (c), 5 (d),
(E), (f) is an explanatory view showing the rotation operation of the ratchet gear by the ratchet lever of FIG.

FIG. 6 is an exploded perspective view showing a second embodiment of the work table according to the present invention.

7 is an exploded perspective view showing a cross section of a part of the work table of the present invention shown in FIG. 6;

8 is a plan view showing a holding state of a ratchet gear in the work table of the present invention shown in FIG.

FIG. 9 is an explanatory diagram of a basic state showing a rotation operation of a ratchet gear by the ratchet lever of FIG. 6;

FIG. 10 is an explanatory view of a released state of a stopper lever showing a rotation operation of a ratchet gear by the ratchet lever of FIG. 6;

FIG. 11 is an explanatory view showing a rotation state of a ratchet gear by the ratchet lever of FIG. 6;

FIG. 12 is an explanatory view of an engagement state of a stopper lever showing a rotation operation of a ratchet gear by the ratchet lever of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case main body 2 Center plate 7 Bottom plate 10 Cylinder 11 Drive plate 12 Feeding piston member 13 Returning piston member 14 Partition plate 15 Support pin 20 Drive pin 21 Rotating plate 26 Drive roller 27 Ratchet lever 29 Roller engaging part 30 Ratchet pawl 31 table plate 35 ratchet gear 39 lever support plate 41 stopper 47 stopper drive lever 56 locking plate 71 stopper lever 73 stopper claw 76 sub stopper lever

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-40245 (JP, A) JP-A-51-111983 (JP, A) Jiko 50-29188 (JP, Y2) Jiko 57- 11702 (JP, Y2) JP-B-45-1394 (JP, B1) JP-B 38-10290 (JP, Y1) JP-B 50-29188 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23Q 16/06

Claims (3)

(57) [Claims] 1. A work table for holding a predetermined work and performing positioning, transport, and the like when processing the work, etc., wherein a table plate for mounting and holding the work on an upper part of a case body is rotatable. And an annular cylinder is arranged inside the case body, and an arc-shaped driving plate is arranged inside the cylinder so as to be able to reciprocate inside the cylinder by a fluid supplied to the cylinder, A work table, comprising: a rotating plate that is rotated by movement of the driving plate; and a ratchet mechanism that intermittently rotates the table plate on the rotating plate. And a ratchet gear integrally formed on said table plate, and a ratchet lever which meshes with said ratchet gear during a feed operation of said rotating plate and is released during a return operation. The work table according to claim 1, wherein the work table is constituted by: 3. The work table according to claim 1, further comprising a stopper mechanism for holding the table plate when the rotating plate returns.