JPS5988243A - Rotary index apparatus - Google Patents

Abstract

PURPOSE:To make a rotary index apparatus smaller in size and improve the positioning accuracy, by adapting the rotary table retained by a horizontally retaining device at its periphery to be disengaged from its driving mechanism and positioned with a positioning pin inserted in the same at the time of positioning. CONSTITUTION:A rotary table 15 horizontally retained by a horizontally retaining device 60 is smoothly rotated by a friction wheel 19 of a driving mechanism 61 pushed against the same by push means 62. An air cylinder 28 is actuated by a signal from a photoelectric switch or the like to raise a positioning pin 25 and insert the same in a positioning hole 16, while the friction wheel 19 is disengaged from the rotary table 15 by means of an inclined block 29 of disengagement means 64 adapted to push out an inclined block 30, and the rotary table 15 is stopped and the positioning is completed. When the pin 25 is removed from the positioning hole 16, the friction wheel 19 engages with the rotary table 15 again to rotate it. Thus the rotary index apparatus is made smaller in size, setting of any index number is made possible, and the accuracy in the positioning is improved.

Description

Detailed Description of the Invention [Field of Application of the Invention] The present invention rotates the rotary table by a drive device that engages with the outer circumferential side of the rotary table, and also controls the engagement between the drive device and the rotary table when inserting a positioning pin. The present invention relates to a rotary indexing device that performs positioning by releasing the alignment.

[Prior Art] Various types of rotary indexing devices have been used to position rotary tables.

FIG. 1 shows a general system, which is composed of a rotary index unit 1 driven by a motor 2, etc., and a rotary deple 13 connected to the rotary index unit 1 by bearing support. The index accuracy of this device is determined by the stop position accuracy of the rotary index unit 1, and the number of indexes is also limited to approximately 4.8 degrees and 12.16 degrees due to the shape limitations of the rotary index unit 1. Furthermore, as the number of indexes increases, the outer diameter of the rotary table 13 also increases, which requires rigidity, which increases the size of the entire device, and has the disadvantage that the device becomes complicated and expensive in order to maintain index accuracy.

That is, as shown in FIG. 1, a rotating shaft 1o is connected upright to an output shaft 9 on the upper side of the rotary indexing unit 1 placed on the base soil, and a rotary table 16 is attached to the upper side of the rotating shaft 1o. It is being Note that the rotating shaft 1o is attached to a bearing 1 on a bracket 12 attached to the above-mentioned frame.
It is pivoted by 1. A reduction gear 7° clutch brake unit 5 is connected to the input shaft 8 of the rotary index unit 10 via a shaft joint 6, and these are connected to the drive motor 2 via a timing pulley 5 and a timing belt 4. From the above configuration, the rotary table 13
The indexing is performed by rotating the rotary indexing unit 1 by the drive motor 2, and the indexing accuracy is determined by the stopping position accuracy of the rotary indexing unit 1. Further, the number of indexes is limited to approximately 4, 8, or 12.16 due to the structure of the rotary index unit 1, and it is not possible to set an arbitrary number of indexes. Further, as the number of indexes increases, the shape of the rotary index unit 1 increases, and the outer diameter of the rotary table 13 increases in proportion to this.

When the outer diameter of the rotary table 13 increases, the rigidity
As a result, the dimensions of each part become larger and heavier, and the drive system for driving the rotary table 13 becomes larger and has a larger capacity.

As described above, in conventional rotary indexing devices, the number of indexes cannot be set arbitrarily, the device becomes larger and more expensive as the number of indexes increases, and the indexing accuracy depends entirely on the stop position accuracy of the rotary indexing unit. However, there were drawbacks such as limitations. As one means of solving this problem, there is a method of attaching a stopping position tJIt 5 units (not shown) to the rotary table 13, but this has the disadvantage of complicating the loading device. Furthermore, as shown in Japanese Patent Application No. 55-56688, there is also a means for applying rotational force while supporting the outer circumferential side of the rotary table, stopping the rotary table by pressing it against a predetermined stopper, and inserting a positioning bottle into the rotary table for positioning. However, with this method, the number of □indexes □ is limited to 2 or 4, and positioning is performed by repeating forward and reverse rotations of the rotary table, and indexing is performed sequentially while rotating in one direction. However, it is technically difficult, and the structure is complicated and expensive.

[Purpose of the invention]

The present invention was devised in order to solve the above-mentioned drawbacks, and its purpose is to make the device small and lightweight, simple and inexpensive, and also to be able to set an arbitrary number of indexes. An object of the present invention is to provide a rotary indexing device that can improve positioning accuracy.

[Summary of the invention]

In order to achieve the above object, the present invention has the same structure as a table horizontal holding device that engages with the outer circumferential side of a rotary table having a fixed rotating shaft and holds it horizontally. A drive device including an engaging friction wheel and a drive motor for driving the drive device, a suppressing means for pressing the drive device toward the rotary table, and a positioning pin portion that engages in a positioning hole of the rotary table so as to be freely removable and removable; A separating means is provided to separate the driving device from the rotary table against the suppressing means by the insertion operation of the positioning pin portion, and the rotating shaft of the relatively lightweight rotary table holds the center of the driving device and rotates the rotary table. While holding the table horizontally using a horizontal holding device to prevent vertical wobbling on the outer periphery of the table, a drive device applies rotational force to the outer periphery of the table, and when inserting the positioning pin part, the drive device separates the table from the rotary table. This device features a rotary indexing device in which a positioning pin is inserted into a positioning hole of a rotary table to enable accurate positioning.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the drawings.

First, an outline of the embodiment will be explained with reference to FIGS. 2 and 6.

The rotary table 15 is horizontally supported by a bearing 22. A large number of positioning holes 16 are formed through the outer peripheral side of the rotary table 15C. Note that the rotary table 15 is formed to have a thin wall because it has a light weight of 1°. The table horizontal holding device 60 holds the thin rotary table 15 horizontally.
3 on the circumference as shown in Figure 3.
placed at the location. Further, the friction wheel 19 of the drive device 61 is engaged with the outer peripheral side pressure of the rotary table 15.

A suppressing means 62 made of a spring 24 or the like is engaged with the drive device 19 to press the friction wheel 19 of the drive device 19 against the rotary table 15. rotary table 15
Is there a negative position below the positioning hole 16? IJ hole 16
A positioning pin portion 63 having a positioning pin 25 that is inserted into and retractably from the positioning pin portion 63 is provided. A separating means 64 is provided between the drive device 61 and the positioning pin portion 63 to separate the drive device 61 from the rotary table 15 as the positioning pin portion 63 is inserted. This separating means 64, which will be explained in detail later, is formed by tightly engaging an inclined block 60 provided on the driving device 61 side and an inclined block 29 provided on the positioning pin portion 63.

The rotary table 15 of the rotary indexing device having the above configuration is rotated by the drive device 61, and immediately before inserting the positioning pin 16 of the positioning pin portion 66 into the positioning hole 16, the drive device 61 is moved to the rotary table by the separating means 64. 15 apart, rotary table 15
Stop the rotation. At the same time, the positioning pin 25 is inserted into the positioning hole 16, and the rotary table 15 is positioned.

Next, this embodiment will be explained in more detail.

As shown in FIG.
8, a bracket 45 is attached to the bracket 45.
A bearing support bracket 20 is provided inside.

A rotary shaft 46 provided at the center of the thin disk-shaped rotary table 15 is pivotally supported by a bearing 22 inserted into a bearing support bracket 20 . Reference numeral 21 indicates a bearing spacer. Further, as shown in FIG. 6, near the outer circumferential side of the rotary table 15, a plurality of positioning holes 16 are formed through which the circumference is divided into a plurality of equal parts at equal intervals.
On the outer circumferential side of the rotary table 15, a horizontal holding device 60 and one drive device 6 are provided at positions dividing the circumference into three equal parts.
1 is engaged.

As shown in FIG. 2, the table holding pulley 17 of the table horizontal holding device 60 is formed in the shape of a V pulley with a V groove, and is in close contact with the acute corner of the inverted F shape formed on the outer periphery of the table 15. . Further, the table holding pulley 17 is press-mounted on an upright axis to a block 48 that is supported on the pedestal table 18 so as to be slidable in the horizontal direction, and prevents the outer peripheral side of the rotary table 15 from drooping and holds it horizontally. Positioning in the height direction is performed so that the Moreover, the block 48 is
It is moved horizontally by the push bolt 49 to adjust the gap between the table holding pulley 17 and the rotary table 15. In addition, the triple horizontal holding device 60 is arranged so that, as described above,
They are placed at equal intervals. Next, the driving device 61 will be explained with reference to FIG. 2 and FIGS. 4 to 7. The drive device 61 includes a friction wheel 19.゛Motor bracket 31. It is composed of a drive motor 23 and the like.

The friction wheel 19 is made of a material such as rubber to increase MWj and resistance force, and is formed in a V-boot shape having a V-groove.
It is arranged at a position closely joined to the acute corner of the inverted F shape on the outer periphery of the rotary table 15.

The rotating shaft 33 of the friction wheel 19 is connected to the drive motor 23 via a coupling ring 34, as shown in FIG.
It is pivotally supported by a bearing 32 inserted into a motor bracket 61 connected to the flange portion of the drive motor 25. On the other hand, the figures 5 and 7 are on the trestle table 18.
As shown in the figure, supporting metal fittings 56, 56 are fixedly provided facing each other, and guide blocks 67 are provided on the supporting metal fittings 6666, facing each other. A groove parallel to the surface of the gantry table 18 is formed in the guide block 37, and a protrusion 65 provided on the outer side of the motor bracket 31 and facing each other is slidably engaged with the ridge. Thereby, the drive device 61 is supported so as to be movable in the radial direction of the rotary table 15.

With the above configuration, the friction wheel 19 can transmit rotational force to the rotary table 15 by the rotation of the drive motor 23, and can also horizontally move the entire drive device 61 in the radial direction of the rotary table 15. In addition, support money A5
A plate 43 is provided on one end surface side of 6.

Next, the suppressing means 62 will be explained with reference to FIGS. 2, 4, 6, and 7.

A hold pin 69' is formed to protrude from the outer side of the motor bracket 31, which is perpendicular to the outer side on which the protruding portion 35 of the drive device 61 is formed. This hold pin 39'
A hold pin 69 attached to the L-shaped fitting 68 is provided at a position facing and away from the L-shaped fitting 68 . Further, an L-shaped metal fitting 38 is fixedly installed on the mount table 18. A spring 24 is provided between the bold pin 69 and the bold bin 39', and presses (energizes) the drive device 61 toward the rotary table 15.

Next, the positioning pin portion 65 will be explained with reference to FIGS. 2, 4, 6, and 7.

The positioning pin portion 63 has the positioning pin 25. It is composed of a pin block 4o, an air cylinder 28, etc.

The positioning pin 25 has an outer diameter that is fit into the positioning hole 16 of the rotary table 15, is provided upright below the positioning hole 16 of the rotary table 15, and is attached to the upper side of the pin block 4o. An air cylinder 28 is connected to the lower side of the pin and lock 4o via a joint 26.

Air cylinder 28 is attached to support plate 27 attached to plate 43. A protrusion 50 is provided on opposing outer surfaces of the pin block 40, and the protrusion 50 is slidably supported in a groove of a guide block 51 attached to the support fitting 36.

Note that the groove portion is formed in the direction in which the positioning pin 25 is inserted.

With the above configuration, the positioning pin part 63 moves the positioning pin 25 up and down while being guided by the guide block 51 by the air cylinder 28, and connects it to the positioning hole 16.
to enter and exit.

The next pressure and separation means 64 will be explained with reference to FIGS. 4, 6 and 7.

On the outer surface side opposite to the outer surface where the hold pin 39' of the motor bracket 51 is provided, there is a tilt block 50 that allows you to feel the tilt angle narrowing toward the insertion direction of the positioning pin 25 of the positioning bin part 63. is provided. On the other hand, on the outer surface side of the positioning bin portion 63 that is perpendicular to the outer surface where the protruding portion 50 of the pin block 40 is formed,
A tilt block 29 is attached by bolts 42 at a position facing the tilt block 30. Tilt block 29
An inclination angle is formed in which frA is equal to the inclination angle of one block 30, so that both can be brought into close contact.

Note that the tilt block 29 is movable in the vertical direction by an adjustment screw 41. The gap between the inclined block 30 and the inclined block 29 is adjusted to zero just before the positioning pin 25 is about to be inserted into the positioning hole 16 of the rotary table 15σ. Therefore, when the positioning pin 25 is in the lower fixed position, no gap is formed. Conversely, the positioning pin 25 is connected to the positioning hole 1.
6, the tilt block 60 is inserted into the tilt block 2
9, the drive device 61 resists the spring 24 of the pressing means 66 and moves toward the suppressing means 66.

Therefore, the N stop 19 is separated from the rotary table 15, and the rotation of the rotary table 15 is stopped.

Next, the operation of this embodiment will be explained.

As shown in FIG. 4, the drive device 61 engages with the rotary table 15, and the a stop 19 causes the rotary table 15 to
gives rotational force to. The rotary table 15 rotates smoothly due to the pressing force of the pressing means 62 and the frictional force of the friction wheel 19. Since the rotary table 15 has a large radius and is thin and lightweight, it can be rotated with a small rotational force. Therefore, the drive torque of the drive motor 23 is small, and a small capacity drive motor 23 is sufficient. becomes. Also, although the rotary table 15 is thin,
As described above, since the table is held horizontally by the table horizontal holding device 60, it can be rotated smoothly without drooping on the outer peripheral side. In the above state, the positioning bin portion 63 is positioned at the lowest position by operating the air cylinder 28. Therefore, as mentioned above, the inclined block 3 of the separating means 64
A gap is formed between 0 and the inclined block 29. Of course, the drive device 61 is pushed toward the positioning bin part 63 by the spring 24 of the suppressing means 62, or the rotary table 15 and the friction wheel 19 are pressed against each other as described above.
A gap remains between the inclined block 30 and the inclined block 29.

Next, the air cylinder 28 is operated at an appropriate time by timer control or a photoelectric switch (not shown), and the positioning bin 25 is raised. However, as described above, the gap does not become zero until the positioning bin 25 comes directly in front of the positioning hole 16, and the drive device 61 continues to drive the rotary table 15. Positioning pin 25 or positioning hole 16
At the same time, as mentioned above, the tilt pro, Tsuku 2
9, the tilting block 30 is pushed and the friction wheel 19 of the drive device 61 is separated from the rotary table 15.

Therefore, the rotary table 15 stops. At the same time, the positioning pin 25 is inserted into the positioning hole 16, and the positioning is performed photon. Next, when the positioning bin 25 is removed from the positioning hole 16 by lowering the air cylinder 28 again, the drive device 61 engages with the rotary table 15 due to the action of the spring 24 of the pressing means 62 and rotates constantly. The rotary table 15 starts rotating smoothly by the drive motor 23.

As described above, by sequentially fitting the positioning pins 25 into the positioning holes 16 accurately formed in the rotary table 15, positioning accuracy can be maintained, and by forming an appropriate number of positioning holes 16, , arbitrary σ) index number can be set.

In addition, as shown above, the rotary table is thin and lightweight, so its support structure can be made smaller.
Capacity can be increased. In addition, prior art σ) Taro<, rotary index unit, reducer, etc. must be narrowed,
The number of components is reduced, making it lighter and cheaper. In addition, the control means (only the air cylinder 28, etc.) need be controlled, making it extremely simple.Furthermore, as shown in FIG. /4 equipment power;
It can be used only once, saving space.

In the above embodiment, the force of engaging the friction wheel 19 of the drive device (η61) with the outer periphery of the rotary table 15 may be applied to a surface near the outer periphery.Of course, in this case, the pressing means The structure and direction of the separation means 62 and the separation means 64 are different from this embodiment.

Also, friction wheel 19 and table holding]''-IJ174!
The table horizontal holding device 60 is not limited to a V-pulley shape (Although the table horizontal holding device 60 is limited to six locations on the circumference, σ), and the driving device 61 is not limited to one location.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the device can be made smaller, the capacity can be reduced, and the capacity can be simplified. - It is possible to set the number of indexes in the position, and the effect of improving the accuracy of positioning is achieved.

[Brief explanation of drawings]

FIG. 1 is a front sectional view showing a conventional rotary indexing device, FIG. 2 is a front sectional view of the present invention at 0 seconds, FIG. Figure 4 is a front sectional view showing the main parts of the embodiment before the positioning bin is inserted, Figure 5 is a side view to i-plane showing the drive device of the embodiment, and Figure 6 is a front sectional view of the main parts of the embodiment. FIG. 7 is a front sectional view showing the state when the positioning pin is inserted, and FIG. 15・・・・・・・・・・・・Rotary table 16・・・・・・・・・・・・Positioning hole 17・・
・・・・・・・・・・・・Table holding pulley 18・
.........Track table 19...
・・・・・・・・・Friction wheel 20・・・・・・・・・・
...Bearing support bracket 21...
......Bearing spacer 22...
・・・・・・・・・Bearing 23・・・・・・・・・
...... Drive motor 24...
・・・・・・Spring 25・−・−・・・・・・・Positioning pin 26・・・・・・・・・・・・・Joint 27・
......Support plate 28...
...... Air cylinder 29...
・・・－・・・・Inclination block 30・・・・・・・・・・
...... Slanted block 31 ...
・・・・7-ta bracket 32・・・・・・・・・・・・・
・・・Bearing 33・・・・・・・・・・・・−・
・Rotating shaft 34...Coupling 35...Protrusion 6
6...4 Support bracket 67...
・・・・・・Guide block 38・・・・・・・・・
・・・・・・L type fitting 39・・・・・・・・・・・・・・・
・Hold pin 69'・・・・・・・・・・・・・・・
Hold pin 40・・・・・・・・・Pin block 41・・・・・・・・・・・・Adjustment screw 4
2... Song... Bolt 43...
・Song...F L/-)45・・・・・・・・・・・・・・・
... Bracket 46 ... Song ... Hitting / Rotating shaft 47 ...
・・・・・・・・・・・・・Frame 48・Tap・Bending block 49・・・・Push bolt 50
......Protruding portion 51...
・・・・・・・・・Guide block 60・・・・・・
......Table horizontal holding device 61...
・・・・・・・・・・Drive device 62・・・・−
Song --- Pressing means 63 --- Positioning pin section 64 --- Separation means Figure 1 Whisper Z Figure 3 Eye diagram 4

Claims (1)

[Claims] 1. A table horizontal holding device that engages with the outer periphery 111j of a rotary table having a rotating shaft fixedly installed in the center and a positioning hole formed near the outer periphery to hold it horizontally; a drive device having a friction wheel that engages with the outer circumferential side of the table and a drive motor that drives the friction wheel; a suppressing means that presses the drive device against the rotary table sea bream; A rotary indexing device comprising: a positioning pin portion to be engaged; and a separating means for separating the driving device from the rotary table against the suppressing means by an insertion operation of the positioning pin portion. 2. The separating means is provided on the driving device side and includes an inclined block forming an inclined angle that narrows in the direction of insertion of the positioning pin part, and a tilted block provided on the positioning pin part side and forming an inclined block. A rotary indexing device a0 according to claim 1, characterized in that the rotary indexing device a0 is constituted by a tilting block that forms a tangent tilt angle and is movable in the insertion direction of the positioning pin portion.