JPH0434256A - Intermittent driving gear - Google Patents

Abstract

PURPOSE:To make it possible to give intermittent rotation in both normal and reverse directions to an output shaft, mechanical stop action and positioning action firmly in a stop position by alternately actuating a rotational output transmitting device and an output shaft fixing device to intermittently drive the output shaft in both the normal and reverse directions. CONSTITUTION:When a piston rod 16a is actuated to advance or retract by operating a fluid cylinder device 16, a drive disk 20 receives turn driving in the CW or CCW direction over a rotational angle determined by a specified stroke amount of the disk 20. On the other hand, in a fluid cylinder device 30 on a protruding bed 22 of the drive disk 20, when a protrusive pawl 31a of the device 30 is engaged with an indexing recessed part 24a of an indexing plate 24, rotation of equal degree of angle is transmitted to an output shaft 40 when the drive disk 20 is rotated by the predetermined degree of angle. Therefore, a rotation output transmitting device is formed by the fluid cylinder device 30. On the other hand, in a fluid cylinder device 36 by which an output shaft fixing device is formed, when a protrusive pawl 37a is engaged with the recessed part 24a, also the output shaft 40 is fixed to a rotation impossible condition by restricting the indexing plate 24.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides for intermittent forward and reverse rotation of a predetermined angle on a rotary output shaft rotatably attached to a base via a rotary bearing. a driven body coupled to the same output shaft;
For example, the present invention relates to an intermittent drive device capable of providing intermittent rotational drive to a work feeder device or the like that supplies workpieces to an automatic processing machine.

It has the characteristic of not being sought after. Therefore, the device constituting the drive source is often selected from drive devices that generally use pressurized oil or pressurized air as a working medium, as they can meet such conditions. In addition, many conventional intermittent drive mechanisms use mechanisms and detection means that involve intervening elements such as cams and Rollei T1 chains, and moreover, the intermittent rotation device itself can be used as a precision work table for automatic processing machines. There are many configurations that are applied to high-end equipment such as

[Prior art]

Conventionally, automatic parts supply devices, etc. that automatically supply workpieces to automatic processing machines, etc., sequentially index multiple workpiece loading tables to the parts supply position to supply workpieces to automatic processing machines. In order to deliver and receive workpieces, the automatic parts supply device is configured to operate intermittently, that is, to perform intermittent rotation. Furthermore, the load applied to the drive source of the automatic parts supply device varies greatly due to changes in the number of loaded workpieces, etc., and moreover, high-speed intermittent operation is required [Problem to be solved by the invention] Therefore, simply In order to form an intermittent drive device that is used as a device that provides intermittent forward and reverse rotational motion to a rotary output shaft, there is a drawback that the components used are large-scale and the cost is high. In other words, when an automatic processing machine performs processing work, it has excessive performance when applied to a work feeder, etc. that performs a relatively large-scale intermittent operation that only sequentially feeds workpieces, which is a workpiece material, and therefore , there is a problem of high cost. In addition, since an intermittent drive force transmission system from the drive source to the driven body is built-in, there is a problem that the device tends to be larger.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an intermittent drive device that can solve the above-mentioned problems associated with the conventional intermittent drive device and has a low-cost structure.

Another object of the present invention is to be able to provide intermittent rotation in both forward and reverse directions to an output shaft that can be coupled to a driven body that requires intermittent rotational drive with ordinary precision, and to provide strong mechanical stability at the stop position. It is an object of the present invention to provide an intermittent drive device capable of providing a stopping action and a positioning action.

[Means to solve the problem]

In the present invention, the drive source for intermittent operation is composed of a single element, and is composed of a cylinder type drive device that performs the minimum necessary reciprocating stroke operation, and the intermittent rotational driving force is extracted from the drive device, and the intermittent drive Intermittent rotational force to the output shaft is generated by alternately applying a transmission cylinder device that transmits force to the rotational output shaft and a stop cylinder device that performs positioning and stopping functions for each predetermined intermittent rotational operation. The output shaft can be arbitrarily given, and the output shaft can be stopped and positioned. That is, the present invention
An intermittent drive device capable of intermittently imparting a predetermined amount of forward and reverse rotation to a rotary output shaft rotatably attached to a base via a rotary bearing, an attached drive source, a drive disk that is rotatably attached to the base and can be rotated by a predetermined angle in both forward and reverse directions alternately by the drive source, and a drive disk that is attached to the rotation output shaft. , and an indexing plate having a plurality of indexing engagement portions at positions opposite to the driving disk; and an indexing plate provided on the driving disk and engaging with the indexing engagement portions of the indexing plate. , a rotational output transmission device having a releasable engagement portion and transmitting the rotation of the drive disk to the index plate when engaged; and a rotation output transmission device provided on the base and the indexing member of the index plate. and an output shaft fixing device that has an engaging portion that can be freely engaged and disengaged from the coupling portion, and that positions and stops the rotational output shaft via the index plate when engaged, and the output shaft fixing device that transmits the rotational output. The present invention provides an intermittent drive device that intermittently drives the output shaft in the forward and reverse directions by alternately operating the device and the output shaft fixing device. Note that the above drive source may be constructed from a cylinder device having a configuration for converting linear motion into rotational motion, or from a drive source device equivalent thereto. In the embodiments to be described later, an embodiment will be described that includes a cylinder device that converts linear motion into rotational motion and a coupling link.

[Effect]

According to the above configuration, the engaging portion of the rotational output transmission device is engaged with the engaging portion of the index plate, and the engaging portion of the output shaft fixing device is disengaged from the engaging portion of the index plate. When the drive source is operated in this state, a predetermined angular amount of rotation of the drive disc is applied to the output shaft via the index plate, and intermittent rotation of a predetermined angle can be applied in a predetermined rotation direction. Note that when the engaging portion of the output shaft fixing device is engaged with the engaging portion of the index plate, the output shaft is fixed at the stop position. Moreover, the drive source is operated with the engaging part of the output shaft fixing device engaged with the engaging part of the index plate, and the engaging part of the rotational output transmission device being disengaged from the engaging part of the index plate. Then, only the drive source returns to its original position, and then the engaging part of the rotational output transmission device is again engaged with the engaging part of the index plate, and the engaging part of the output shaft fixing device is connected to the index plate. By activating the drive source after forming a state in which it is disengaged from the engaging portion, intermittent rotation in the same direction can be applied again. On the other hand, when the drive source is stroked back to the original position, the engaging portion of the rotational output transmission device is engaged with the engaging portion of the index plate, and the engaging portion of the output shaft fixing device is engaged with the engaging portion of the index plate. When the output shaft is disengaged from the engagement portion, it is possible to apply intermittent rotational motion to the output shaft in a direction opposite to the above-mentioned predetermined direction and to stop the output shaft. Hereinafter, the present invention will be explained in more detail based on examples.

〔Example〕

FIG. 1 is a schematic perspective view showing an embodiment in which a work feeder is coupled to an output shaft that is intermittently driven by an intermittent drive device according to the present invention, and FIG. 2 is a longitudinal section including the line ■-■ in FIG. FIG. 3 is a plan view of the intermittent drive taken along the line indicated by the arrows ■-■ in FIG. 2, and FIG. FIG. 5 is a partial perspective view showing a specific example of the configuration of a linear drive device that imparts rotation and a rotational output transmission device; FIG. 6 is a partial perspective view showing a specific example of the configuration of an output shaft fixing device of the drive device;
Figures A and 6B illustrate the interactions among the linear drive device, rotational output transmission device, and output shaft fixing device when the output shaft is intermittently rotated in the forward and reverse directions by the intermittent drive device according to the present invention. This is a flowchart.

First, referring to FIG. 1 and FIG. 2, the intermittent drive device 10 according to the embodiment of the present invention has a base 12, and is fixed to the base 12 or is integrally processed so as to be erected as an integral structure. A device that provides an intermittent rotational motion to an output shaft 40, which will be described later and is rotatably attached to the boss 14 of the stationary structure through a rotation bearing 18b around a vertical axis. It is configured as.

Now, in addition to the stationary structure, the intermittent drive device 1o is a fluid pressure (hydraulic or pneumatic) cylinder device that is mounted on the base 12 to form a direct 1TL drive source and has a piston rod 16a. 16. A drive disk 20 that is rotatable above the upper surface of the base 12 via a rotary bearing 18a on the boss 14 that is integrally constructed with the base 12; this rotatable drive disk 20
An index plate is attached above as a separate component to the lower part of the output shaft 40 that is driven to rotate intermittently by the present intermittent drive device 10, or as shown in the illustrated example, an index plate is provided integrally with the lower end portion of the output shaft 4o. 24, the piston rod 16a of the cylinder device 16 forming the direct drive source at the drive disk 2°;
A protruding base 22 is formed to protrude laterally from the side surface of the disc toward a position opposite to the . It is configured to include a fluid pressure cylinder device 36, etc., which forms an output shaft fixing device, which is mounted on the base 12 and arranged at a position approximately 180° opposite to the above-mentioned fluid pressure cylinder 3o. Further, a stopper 22a is provided which protrudes laterally from a predetermined location on the side surface of the drive disk 20 and acts when the drive disk 20 stops rotating, and is placed on the base 12 so that the output shaft 400 rotation center is When the driving disk 20 collides with the two stop buffers 23a and 23b installed at a predetermined angle apart from each other, the drive disk 20 rotates in the forward direction (CW
It forms a stop spring means for the same rotation or reverse rotation (CCW rotation in the drawing) and a buffer means for stopping.

Now, the tip of the piston rod 16a of the cylinder device 16 constituting the direct drive source is connected to the output shaft 400 at one point of the protruding base 22 of the drive disk 20 via the link mechanism 16b.
By being pivotally coupled so as to be able to exert a moment force corresponding to the length of the arm from the center of rotation, it constitutes a drive source that converts linear motion into rotational motion, and therefore, by the operation of the fluid cylinder device 16, the piston When the rod 16a moves forward or retreats (see arrow F or R in FIG. 1), the drive disk 2
0 is configured such that the CW force direction is subjected to turning drive in the CCW direction over a rotation angle determined according to a prescribed stroke amount of the piston rod 16a. In other words, the linear fluid cylinder device 16 forms a drive source that provides a rotational output to the drive disk 20, and the drive disk 20 itself has a predetermined angular correction determined from the stroke amount of the cylinder device 160.・
The structure is such that only reverse rotation is allowed, and therefore, the stopper 22a and stop buffers 23a and 23b are installed at substantially the end positions of the forward and reverse rotations of the predetermined angular amount, and the drive disk 20 is always rotated. It functions to regulate the rotation stop position to a constant position and at the same time to buffer the shock at the time of a stop collision.

On the other hand, the fluid cylinder device 30 provided on the protruding base 22 of the driving disk 20 has a piston rod 31 that moves forward or backward as shown by arrow P in FIG.
1 has a protruding pawl 31a at its tip that can freely engage and detach from a plurality of indexing recesses 24a formed in the side surface of the indexing plate 24 when moving forward. Then, the protruding claw 31a is connected to the index plate 2.
When the drive disk 20 rotates by a predetermined angle in the CW or CCW direction while the drive disk 20 is engaged in the index recess 24a of No. 4, the rotation is transmitted to the output shaft 40 via the index plate 24. , and transmit the same angular amount of rotation to the output shaft 40. Therefore, the fluid cylinder device 30 forms a rotational output transmission device that transmits rotational force from the drive disk 20 to the output shaft 40 via the index plate 24. Incidentally, the index recess 24a formed in the index plate 24 is
A plurality of them are arranged on the side surface of the index plate 24 at angular intervals corresponding to the amount of rotation angle in the CW or CCW direction.

That is, after the index plate 24 rotates in the CCW direction together with the drive disk 20, the rotational output transmission device 3
When the protruding claw 31 of No. 0 is removed from the recess 24a into which it is engaged, and only the drive disk 20 is rotated back by the operation of the drive source cylinder device 16 and returned to its original position, the index plate 24 side performs the following steps. The plurality of index recesses 24a are arranged so that the recesses 24a are located exactly at the position facing the piston rod 31 of the fluid cylinder device 30 for transmitting rotational output.

On the other hand, a fluid cylinder device 36 forming an output shaft fixing device
The cylinder device 36 also has a piston rod 37 that moves forward or retreats in the direction indicated by the arrow Q in FIG.
A protruding pawl 37a is provided at the tip of the protruding pawl 37a in such a manner that it can be inserted into and removed from the indexing recess 24a of the indexing plate 24. That is, the protruding claw 37a is located in the recess 24a of the index plate 24.
, the index plate 24 is restrained, and therefore the output shaft 4
0 is also fixed in a non-rotatable state. Therefore, if the protruding pawl 37a of the fluid cylinder device 36 is inserted into the indexing recess 24a of the indexing plate 240 at a position where the output shaft 40 is rotated by a predetermined amount of angle, the indexing plate 24 and Since it performs the function of positioning and fixing the output shaft 40, the fluid cylinder device 36 forms an output shaft fixing device.

Now, in FIG. 1, above the output shaft 40 is a configuration in which a work feeder device 50 is installed as an example of effectively applying the intermittent drive device 10 of the present invention.

The work feeder device 50 includes a plurality of work support devices 54 provided on the upper surface of a substrate 52, and each work support device 54
A plurality of workpieces W are stacked and supported in multiple stages by three workpiece support rods 56. Therefore, when transferring a workpiece W to and from an automatic processing machine, for example, at the workpiece transfer station position S facing the workpiece feeder device 50, the workpiece feeder device 50 is intermittently rotated by the output shaft 40 and the predetermined workpiece support device 54 is rotated intermittently. The workpiece is indexed to the workpiece transfer station position S, one workpiece W is delivered to the automatic processing machine from among the plurality of works W stacked on the workpiece support device 54, and the processed workpiece W is received from the automatic processing machine side and the empty The workpiece support device 54 in the state is indexed to the workpiece transfer station position S, and processes such as returning the processed workpiece W thereto are performed using the CW of the output shaft 40.
The force direction can be achieved using intermittent rotation in the CCW direction.

FIG. 3 is a plan view of the above-mentioned intermittent drive device 10, showing the fluid cylinder device 16 of the drive source and the stop buffer 23a arranged on the base 12 of the stationary structure.

23b1 Fluid cylinder device 36 forming the output shaft fixing device, etc., and fluid cylinder device 30 for the rotational output transmission device attached to the protruding base 22 of the drive disk 20. Index recess 24a1 of the index plate 24. The center of rotation of the axis 4° CS drive disk 20 rotates by a predetermined rotation angle θ by one forward stroke of the fluid cylinder device 16 (it also rotates in the opposite direction by the same rotation angle θ by one backward stroke). ) etc. are illustrated. In particular, when the drive disk 2o rotates through an angle of θ, and therefore its protruding base 22 is rotationally displaced from the solid line position to the position partially shown by the dotted line, the stopper 22a moves against the stop shock absorber 23b. It is rotated from the position shown in S to the position shown in dotted line where it collides with the stop buffer 23a, and then stopped. A plurality of index recesses 24a of the index plate 24 are arranged at intervals of the angle θ, and it is preferable that the angle θ is selected to be an angle that equally divides the circumference of 36°. At this time, the forward and backward stroke amounts of the fluid cylinder device 16 are also set correspondingly. It goes without saying that the stop buffer 23a123b may be formed from a well-known commercially available component that includes a built-in damper.

FIG. 4 shows the fluid cylinder device 16 for the drive source described above, the fluid cylinder device 30 for the rotational output transmission device, and the drive disk 2.
0 is a perspective view clearly showing constituent parts such as an index plate 24. What is particularly noteworthy here is that the piston rod 31 of the fluid cylinder device 30 for the rotational output transmission device slides forward or backward between the guide blocks 31b, and the protruding pawl 31a formed at the tip and the index plate 24 index recess 2
4a, the former is formed as a tapered claw that converges toward the tip of the tip, while the latter recess is formed as a recess with a tapered groove complementary to the tapered claw 31a on the outermost side, When the piston rod 31 moves forward toward the index plate 24 by the operation of the fluid cylinder device 30, the protruding claw 31a
is configured to smoothly engage into the indexing recess 24a of the indexing plate 24.

In this way, the engagement between the recess 24a and the protruding pawl 31a is made smooth and reliable, thereby increasing the accuracy of the rotational output transmission action. Similarly, as clearly shown in FIG. 5, the piston rod 37 in the fluid cylinder device 36 for fixing the output shaft also slides forward or backward between the guide blocks 37b, and the tip of the protruding pawl 37a is , a convergent tapered claw is formed in the same way as the protruding claw 31a,
Therefore, the engagement of the protruding pawl 37a into the indexing recess 24a of the indexing plate 24 is smooth and reliable, and the accuracy of the output shaft fixing action by the fluid cylinder device 36 is maintained at a high level. Note that the protruding pawl 31a or 3 of the piston rod 31 or 37 of the fluid cylinder device 3o or 36 is located in the recess 24a on the index plate 24 side shown in FIGS. 4 and 5.
The same operation and effect can be obtained even if the structure in which 7a engages and disengages is formed in such a manner that a protruding pawl is provided on the index plate 24 side and recesses are provided at the tips of both piston rods 31 and 37. Needless to say, it can be done.

Next, an example of the operation in the case where the intermittent rotation operation is applied to the output shaft 4o by the intermittent drive device 10 according to the embodiment of the present invention having the above-described configuration will be described in the sixth AI! 1 and the flowchart of FIG. 6B.

First, FIG. 6A shows a case where intermittent drive is performed in the forward rotational direction shown as the CW force direction in FIG. 1. In addition, in the 6th AIffl, for the drive source, for rotational output transmission,
Respective fluid cylinder devices 16.30.3 for fixing the output shaft
6 is simply described as cylinder 16.30.36.

That is, this is a case where the CW force direction output shaft 40 is intermittently rotated by an angle θ, and in step (2), the cylinder 30 is turned off and the piston rod 31 retreats, so that the protruding pawl 31a moves into the indexing recess of the indexing plate 240. Confirm that it has left the location 24a. Next, in step (2), the cylinder 36 is turned on, the piston rod 37 moves forward, and the protruding pawl 37a moves toward the index plate 2.
Confirm that it is inserted into the recess 24a of No. 4. By performing these two steps (1) and (2), it can be confirmed that the drive disk 20 is in a fixed state in which the output shaft 40 does not rotate even if the cylinder 16 is actuated unexpectedly.

Further, in step (2), the cylinder 16 is turned off (retracted). That is, the piston rod 16a0 moves backward, moving the drive disk 20 to the original position, that is, the position where the stopper 22a is in contact with the stop buffer 23b, in other words, the cylinder 16
Make sure you are in the gas start position. In step (2), the cylinder 36 is moved from on (forward) to off (backward) to disengage the protruding pawl 37a from the indexing recess 24a of the indexing plate 24, and release the fixation of the output shaft 40. Next, in step [F], the cylinder 30 is turned from off (backwards) to on (
forward), and move the protruding claw 31a to the recess 24 at the opposite position.
Involve a. In other words, the rotational output can be transmitted from the drive disk 20 to the index plate 24. Then, in step ■, turn the cylinder 16 from off (reverse) to on (forward).
to operate.

That is, by moving the piston 16a forward, the driving disk 20 is rotated in the positive direction by the rotational angle amount θ. As a result, the rotational force is transmitted to the output shaft 40 via the index plate 24, and the output shaft 40 rotates by the angular amount θ. Drive disc 2
0 stops at the position where the stopper 22a collides with the stop buffer 23a. Next, in step (2), the cylinder 30 is turned off to remove the protruding pawl 31a from the index recess 24a.

As a result, rotational force cannot be transmitted.

Next, in step (2), when the cylinder 37 is actuated to cause the protruding pawl 37a to engage the indexing recess 24a of the indexing plate 240, the indexing plate 24 is restrained and fixed, and therefore the output shaft 40
is also fixed and positioned. At this time, it will be understood that the recess 24a next to the recess 24a into which the protruding claw 31a of the cylinder 30 first entered in the index plate 24 has reached a position facing the protruding claw 31a of the cylinder 30. .

Thereafter, when the output shaft 40 repeats the operation steps from step (2) described above, rotational output is intermittently applied in the positive direction (CW force direction).

Next, referring to FIG. 6B, a process of intermittently rotationally driving the output shaft 40 in a direction opposite to the above-mentioned normal direction (CCW direction) will be explained. To explain step by step, steps ■,■
Then, the same confirmation as in the case of the same CW episode described above is performed. In step (2), turn it on and check that it moves to the start position for reverse rotation. At this time, naturally, the stopper 22a of the driving disk 20 stops! It comes to a position where it collides with the impactor 23a. Next, in step (2), the cylinder 36 is moved from on (forward) to off (backward) to disengage the protruding pawl 37a from the protruding recess 24a of the indexing plate 24, and once release the fixation of the output shaft 40. . Then,
In step ■, turn the cylinder 30 from off (reverse) to on (
forward), and move the protruding claw 31a to the recess 24 at the opposite position.
Involve a.

In other words, the rotational output can be transmitted from the drive disk 20 to the index plate 24. Thereafter, in step (2), the cylinder 16 is operated from on (forward) to off (reverse). That is, the piston 16a is moved backward to apply a reverse (CCW) rotation of the rotation angle amount θ to the drive disk 20. As a result, the rotational force is transferred to the output shaft 40 via the index plate 24.
The output shaft 40 rotates in the opposite direction by an angular amount θ.

Next, in step (2), the cylinder 30 is turned off to remove the protruding pawl 31a from the index recess 24a. As a result, rotational force cannot be transmitted. Next, in step (2), when the cylinder 37 is operated and the protruding pawl 37a is engaged in the indexing recess 24a of the indexing plate 24, the indexing plate 24 is restrained and fixed, and therefore the output shaft 40 also rotates in the opposite direction. fixed in position and positioned together. Thereafter, by repeating steps ① to ②, it is possible to repeatedly apply intermittent operation of reverse rotation to the output shaft 40.

As can be understood from the above description, according to the present invention, an intermittent drive device is configured that provides intermittent rotation to the output shaft 40 by alternately controlling the operation of the fluid cylinder devices 16, 30, 36. There is. Here, the timing for operating the fluid cylinders 16, 30, 36 can be easily accomplished by those skilled in the art according to the well-known control method of controlling the switching of the fluid pressure circuit using a switching valve, so a detailed description thereof will be omitted.

〔Effect of the invention〕

As is clear from the above description, according to the intermittent drive device of the present invention, three fluid-operated cylinder devices are used to apply intermittent rotational motion to the rotating output shaft in the forward direction and the reverse direction, or in a mixture of both. It has an extremely simple structure in which these three cylinder devices, drive disks, and index plates are arranged around a stationary structure consisting of a base and a post, and can be driven intermittently in both forward and reverse directions. In this respect, it has the effect of realizing an intermittent drive device with an extremely wide range of uses at a low cost.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view showing an embodiment in which a work feeder is coupled to an output shaft that is intermittently driven by an intermittent drive device according to the present invention, and FIG. 2 is a longitudinal section including the line ■-■ in FIG. FIG. 3 is a plan view of the intermittent drive taken along the line indicated by the arrows ■-■ in FIG. 2, and FIG. FIG. 5 is a partial perspective view showing a specific example of the configuration of a linear drive device that imparts rotation and a rotational output transmission device; FIG. 6 is a partial perspective view showing a specific example of the configuration of an output shaft fixing device of the drive device;
Figures A and 6B show the interaction between the linear drive device, the rotary output transmission device, and the output shaft fixing device when the output shaft is intermittently rotated in the forward and reverse directions by the intermittent drive device according to the present invention. Flowchart to explain. 10... Intermittent drive device, 12... Base, 14...
Post, 16... Drive source fluid cylinder device, 20...
- Drive disk, 22... Protruding base, 22. a... Stopper, 23a123b... Stop buffer, 24... Index plate, 24a... Index opening, 30... Fluid cylinder device for output rotation transmission, 31a... Projection claw, 36・・・
- Fluid cylinder device for fixing the output shaft, 37a... protruding claw, 40... output shaft. 24Q Fig. Intermittent rotation in the forward direction Fig. 6A Intermittent rotation in the reverse direction Fig. 6B

Claims (1)

[Claims] 1. An intermittent drive device capable of intermittently imparting forward and reverse rotations of a predetermined angle to a rotary output shaft rotatably attached to a base via a rotary bearing. a drive source mounted on the base; and a drive disk rotatably mounted on the base and capable of rotating by a predetermined angle in both forward and reverse directions alternately by the drive source. , an index plate attached to the rotary output shaft and having a plurality of index engagement portions at positions opposite to the drive disk; and an index plate provided on the drive disk and arranged on the index plate. a rotational output transmission device having an engagement rod that can be engaged with and disengaged from an indexing engagement portion, and transmitting the rotation of the driving disk to the indexing plate when engaged; An output shaft fixing device having an engagement rod that can be engaged with and disengaged from the indexing engagement portion of an indexing plate, and positioning and stopping the rotary output shaft via the indexing plate when engaged. An intermittent drive device, characterized in that the output shaft is intermittently driven in both forward and reverse directions by alternately operating the rotational output transmission device and the output shaft fixing device. 2. The drive source is composed of a cylinder device having a configuration for converting linear motion into rotational motion or a device with an equivalent function, and the plurality of indexing engaging portions of the indexing plate are arranged around the indexing plate. a plurality of engagement recesses arranged at angular intervals corresponding to a predetermined angular amount of the drive disk, and the rotational output transmission device and the output shaft fixing device 2. The intermittent drive device according to claim 1, comprising a cylinder device having a protruding pawl at the tip of the engaging rod that engages in the position.