JP2001097533A - Workpiece rotating/carrying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a workpiece rotating/carrying device provided with excellent function and improved in profitability while reducing the number of mechanism without using an expensive mechanism. SOLUTION: The device has a base, a carrying table provided with plural work loading bases freely to be rotated, a rotary shaft for supporting the carrying table in relation to the base freely to be rotated, a motor and an output shaft, a rotary transmitting mechanism having a transmitting and selecting means for interlocking the output shaft with each work loading base of the carrying table and for selecting the interlock between them, a joint for selectively connecting the rotary shaft for carrying table to the output shaft and the rotary shaft to the base. The joint is provided with a first selection drive means for selecting a first position for connecting the rotary shaft to the output shaft and a second position for connecting the rotary shaft for the carrying table to the base, and a second selection drive means for moving the transmitting and selecting mechanism of the rotary transmitting mechanism for the carrying table while selecting the interlock position between the output shaft and the work loading base.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary conveying device for a plurality of workpieces which sequentially transports a plurality of workpieces along a rotational locus.

[0002]

2. Description of the Related Art As a device for transporting a workpiece, a workpiece before processing is moved on a circular gauge from a transport position for carrying in and out on a circle to a processing position on the same circle, and the workpiece is processed at the processing position. After the workpiece is rotated and subjected to processing such as painting, the finished workpiece is moved from the processing position to the transport position on the circle and returned, and the workpiece is removed at the transport position and before the subsequent processing And a rotary conveying device for the workpiece on which the workpiece is placed.

[0003] Conventionally, there has been a rotating transfer device of this type disclosed in Japanese Patent Application Laid-Open No. Hei 7-116567.
6 to 8 show this conventional rotary transfer device.
FIG. 7 is a view schematically showing the configuration of the apparatus, FIG. 7 is a view showing a control system in the apparatus, and FIG. 8 is an explanatory view showing an operation state of the rotation of a workpiece mounting table (workpiece mounting table).

[0006] In FIG. 6, reference numeral 1 denotes an object to be coated; 2, a rotary transfer device; 3, a base of the rotary transfer device 2; 4, a transfer table disposed above the base 3 and rotatably supported; Reference numeral 6 denotes a rotatably supported 2 at both ends of the transfer table 4.
It is a workpiece mounting table (workpiece mounting table).

[0005] 7 is a differential gear unit, 8
Reference numeral 9 denotes an output shaft of the differential gear unit 7, 9 denotes a cylindrical output shaft concentrically disposed outside the output shaft 8, 10 denotes an input shaft provided integrally with a casing of the differential gear unit 7, 11. Is the base 3
Motors 12 and 1 which are fixed inside and connect the output shaft to the input shaft 10 of the differential gear unit 7
Reference numeral 3 denotes a driven device for rotating the workpiece mounting tables 5 and 6, respectively.

The upper portion of the cylindrical output shaft 9 of the differential gear unit 7 is engaged with the driven device 12, and the upper portion of the output shaft 8 is engaged with the driven device 13, respectively. It consists of a subrocket wheel and a chain wound around them. Reference numeral 14 denotes a cylindrical rotary shaft provided integrally with the transfer table 4, in which the differential gear unit 7 is disposed.

[0007] Reference numerals 16 and 17 denote brake devices operated by an air cylinder 15, which are used for a rotating shaft 8 and a rotating shaft 9 provided on the transfer table 4, respectively. 18
Is a brake device operated by the air cylinder 15 and used for the rotary shaft 14 provided on the base 3. 19
Is a cam provided on the rotating shaft 14 integral with the transport table 4, and 20 is a switching valve that engages with the cam 19. The cam 19 and the valve 20 constitute a cam mechanism for controlling the mechanical angle. Switching valves 22 and 23 shown in FIG. 7 are operated by the pilot pressure from the switching valve 20 of the cam mechanism 21 to control the brake devices 16, 17 and 18 as shown in FIG.

The operation of the rotary transport device 2 having the above-described configuration will be described. An operator places the workpiece 1 on the workpiece mounting table 5 (or 6) stopped at a transport position on a circle drawn around the rotation shaft 14, and raises the transport table 4 at an angle of 180 °. To stop moving to the painting position on the same circle, and painting is performed while rotating the work 1 here. After the completion of the coating, the transport table 4 is again rotated at an angle of 180 °, returned to the transport position and stopped, and the coated workpiece 1 is lowered. Repeat the same operation to proceed.

In order to rotate the work table 5 (or 6), the brake device 18 of the rotating shaft 14 of the transfer table 4 is released by the air cylinder 15, and the differential gear unit 7 The brake devices 17 and 16 of the two output shafts 8 and 9 are connected by the air cylinder 15, and the motor 11 is started. The output shaft 8 and the output shaft 9 are controlled by the brake devices 17 and 16.
Are fixed to the transport table 4 and restricted in rotational movement, and the two side gears of the differential gear unit 7 connected to these output shafts are also restricted in rotational movement. Is transmitted from the differential gear unit 7 to the transfer table 4 via the output shaft 8 and the output shaft 9 and the brake devices 17 and 16. The transfer table 4 rotates to move the workpiece mounting table 5 (or 6) in rotation.
Stop 1

When the workpiece mounting table 5 (or 6) is at the painting position, the brake devices 16 and 18 are connected by controlling the switching valve 20 of the cam mechanism 21 and the switching valves 22 and 23. On the other hand, the brake device 17 is released,
When the motor 11 is driven, the transfer table 4 and the work table 6 (or 5) are kept stationary, and only the work table 5 (or 6) rotates. With this operation, the work table 5 (or 6) can be rotated by a required angle, while the work table 6 (or 5) is stationary, so that the safety of the worker can be ensured. . The positions of the transport table 4 and the work tables 5 and 6 are confirmed by a combination of a cam and a limit switch, not shown.

[0011]

However, such a conventional rotary conveying apparatus has the following problems.

That is, in order to rotationally drive one transfer table 4 and two work placing tables 5 and 6, the base 3
, One set of differential gear unit 7 and three sets of brake devices 16, 17 and 18 are used to operate the three sets of brake devices 16, 17 and 18 in combination. Three sets of rotational driving are selectively performed.

Therefore, the drive motor 11 can be placed at a position distant from the processing position in a bad environment, and the effect of ensuring that the work table at the transfer position does not rotate can be obtained.

However, in such a conventional rotary transfer device, an expensive differential gear unit 7 must be used, and three brake devices 15, 16 and 18 are required. However, there is a problem that the cost of these mechanisms increases due to the large number of the respective mechanisms, and as a result, the cost of the entire apparatus increases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a very economical rotary transfer apparatus for a workpiece which has excellent functions, uses no expensive mechanisms and reduces the number of mechanisms.

[0016]

According to a first aspect of the present invention, there is provided an apparatus for rotating and conveying a workpiece, wherein a plurality of workpiece mounting tables are rotatably provided at a base and at positions dispersed in a circumferential direction of rotation. A reduction gear unit having a transfer table provided, a rotation shaft rotatably supporting the transfer table on the base, an electric motor provided on the base, and an output shaft for transmitting rotation of the motor, and a reduction gear A transmission selection unit is provided in association with the output shaft of the unit and each work table of the transfer table, and selects a link between the output shaft and each work table at an intermediate stage. A rotation transmission mechanism, a joint for selectively connecting the transfer table rotation shaft, the output shaft of the reduction gear unit, and the transfer table rotation shaft and the base, and connecting the joint with the transfer table rotation shaft. Said First selection driving means for selecting and moving a first position connecting an output shaft of a high-speed gear unit and a second position connecting the rotation shaft for the transfer table and the base; and the transfer table And a second selection drive means for selecting and moving the transmission selection means of the rotation transmission mechanism for use by selecting an associated position between the output shaft of the reduction gear unit and each of the workpiece mounting tables. .

According to a second aspect of the present invention, in the rotary transfer device for a workpiece according to the first aspect, the rotary shaft for the transfer table and the output shaft of the reduction gear unit are each formed into a cylindrical body on the same axis. While being arranged side by side, the selection transmission means of the transfer table rotation transmission mechanism is inserted into the inside of the transfer table rotation shaft and the output shaft to be linked to the output shaft, and the joint has a cylindrical shape. And is movably fitted to the outer peripheral side of the rotary shaft.

According to a third aspect of the present invention, in the apparatus for rotating and conveying a workpiece according to the first aspect, each of the first selection driving means and the second selection driving means is a cylinder.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. In this embodiment,
The workpiece is rotated (revolved) between the coating position and the transport position using a transport table having two workpiece mounting tables on the same circle, and the workpiece mounting table is rotated at each position ( FIG. 1 is a cross-sectional view schematically showing a configuration of a rotary transfer device according to this embodiment, FIG. 2 is a substantial plan view, and FIG. 3 is a direction A in FIG. FIG. 4 is a sectional view taken along line BB of FIG. 1 showing a plan view of the dog (cam), and FIG.
It is sectional drawing which shows the attachment state of.

In these figures (mainly see FIG. 1), reference numeral 1 denotes a workpiece, and reference numeral 30 denotes a rotary transfer device according to the present embodiment. The rotary transfer device 30 will be described. Reference numeral 31 denotes a base, and 32 denotes a belt-shaped transfer table disposed above the base 31. The base is provided with a rotating shaft 47 provided in the lower central portion along a vertical direction as described later. 31 rotatably supported. 33, 34
Numerals are two workpiece mounting tables which are respectively disposed on both upper ends of the transport table 32 and supported rotatably. In other words, a plurality of, for example, two workpiece mounting tables are rotatably provided on the transport table 32 at positions dispersed in the rotational circumferential direction.

In the drawing, reference numeral 35 denotes a servo motor which is a drive motor disposed inside the base 31 and supported via a placket (not shown), and reference numeral 36 denotes a reduction gear which is rotationally driven by a servo motor 35 via a toothed belt 37. Unit, 3
Reference numeral 8 denotes a cylindrical output shaft provided vertically to the reduction gear unit 36. Reference numeral 39 denotes a spline hub which is coaxially disposed on an upper end of the output shaft 38 and has a flange 39a fixed to an end face of the output shaft 38. It is. The output shaft 38 and the spline hub 39 constitute an output shaft for transmitting the rotation of the electric motor.

In the drawing, reference numeral 43 denotes four stepped guide rods 44.
A lifter plate 45 guided vertically (see also FIG. 3) to move up and down in a horizontal posture is provided suspended from a lifter plate 4 via a bracket integrated with a reduction gear unit 36.
3 is an air cylinder (second cylinder) for driving up and down 3. Reference numeral 46 denotes a bearing provided at the tip of the lifter plate 43. The bearing 46 rotatably supports a lower end of a spline shaft 40 described later. Thus, the spline shaft 40 can be moved up and down by the air cylinder 45 and stopped at the upper limit position and the lower limit position according to the two work placement tables 33 and 34, respectively. That is, the air cylinder 45 connects the spline shaft 40, which is the transmission selecting means of the rotation transmission mechanism for the transfer table, to the output shafts (38, 39) of the reduction gear unit 36 and the work table 3.
The second selection driving means for selecting and moving the link position with the third and third positions is constituted.

Reference numeral 47 in the figure denotes a cylindrical stepped rotary shaft protruding downward from the center of the transport table 32 in the longitudinal direction along the vertical direction. This rotating shaft 47
Are the small-diameter shaft portion 47a, the large-diameter shaft portion 47b, and the small-diameter shaft portion 47a.
47c and flange 47c provided on the
And has a tapered hole 47d that opens toward the lower side. The large-diameter shaft portion 47b of the rotating shaft 47 is rotatably supported by a bearing provided on the upper portion of the base 31, and the small-diameter shaft portion 47a
Are inserted inside the base 31. Reference numeral 48 denotes a tube which is disposed inside the base 31 and is fitted to the outer peripheral side of the small diameter shaft portion 47a of the stepped rotary shaft 47 via a bush (not shown) so as to be vertically movable and rotatable integrally with the rotary shaft 47. With a shape fitting,
A flange portion 48a is provided at a lower portion of the tubular joint 48. Reference numeral 49 denotes a cylindrical joint 48 which is rotatably fitted to the upper part of the cylindrical joint 48 via a bearing so as to be slidable on the outer peripheral side.
Is a ring plate for moving up and down. The connection between the transport table rotary shaft 47 and the shafts 38 and 39 of the reduction gear unit 36 and the connection between the transport table rotary shaft 47 and the base 31 are selectively performed by the cylindrical joint 48 and the ring plate 49. Constructs a joint.

Reference numeral 50 denotes an air cylinder (first cylinder) for vertically moving a ring plate 49 provided on a bracket integrated with the gear unit 36. Numeral 50a is a nut for connecting the rod of the air cylinder 50 to the ring plate 49. The upper portion is a conical body and forms a stopper that fits into the tapered hole 47c. Flange part 4 at lower part of cylindrical joint 48
8a is provided with a notch hole, and a spline hub 39 is provided.
And a detachable clutch that is engaged with and detached from a key 42 provided on the flange portion 39a. Here, the air cylinder 50 includes a cylindrical joint 48 as a joint, a first position (lower limit position) at which the transfer table rotary shaft 47 and the output shaft 38 of the reduction gear unit 36 are connected, and a transfer table rotary shaft. Second position (upper limit position) for connecting 47 to base 31
And a first selection driving means for selecting and moving.

In the figure, reference numeral 40 denotes a spline shaft which is engaged with the spline hub 39 to form a spline joint. The spline shaft penetrates through the inside of the rotary shaft 47 for the transport table and is vertically arranged at the lower end thereof. At the same time, the upper part is supported by a member provided on the transfer table 32 and inserted into the transfer table 32. 41 is a spline shaft 4
The gear provided at the upper end of the spline hub 39
Key provided on the flange portion 39a. here,
The spline hub 39 is provided so as to rotate and move up and down. The gear 41 moves up and down integrally with the spline shaft 40. Reference numerals 51 and 52 denote transmission mechanisms (corresponding to conventional driven devices) for rotating the workpiece mounting tables 33 and 34, respectively.
These transmission mechanisms 51 and 52 are respectively provided with the workpiece mounting table 33,
34, toothed pulleys 55 and 56 of the same diameter rotatably supported on a shaft provided on the transfer table 32, and toothed pulleys 55 and 56. Gears 57, 58 (gear 5)
7 is a lower side, 58 is an upper side), and ratchet wheels 59, 60 integrally provided below the gears 57, 58 (the ratchet wheel 59 is an upper side, 60
Is the upper side), the toothed pulleys 53 and 55 and the toothed pulley 5
4 and 56 have toothed belts 61 and 62 wound around, respectively. The gears 57 and 58 mesh with each other when the gear 41 moves downward and upward, respectively.

Reference numeral 63 denotes a ratchet wheel rotatably supported by the spline shaft 40 inside the transfer table 32, and moves up and down integrally with the spline shaft 40. And the ratchet wheel 63
Is disengaged from the ratchet wheel 59 when the gear 41 moves downward and meshes with the gear 57, meshes with the ratchet wheel 60, and separates from the ratchet wheel 60 when the gear 41 moves upward and meshes with the gear 58. An engagement clutch that engages with the wheel 59 is formed.

The spline hub 39, spline shaft 40, gear 41, workpiece mounting tables 33 and 34, and transmission mechanisms 51 and 52 are connected to the output shaft 38 of the reduction gear unit 34 and the workpieces of the transfer table 32. Loading table 33,
And a rotation transmission mechanism provided in linkage with the rotation transmission mechanism. Further, the spline shaft 40, the ratchet wheel 63, and the ratchet wheels 59, 60 constitute transmission selecting means for selecting the link between the output shaft and the workpiece mounting table at an intermediate stage in the rotation transmitting mechanism.

4 and 5, 64 and 65
Denotes two dogs provided on the rotation shaft 47 side, respectively, and 66 and 67 denote a mechanical valve and a photoelectric sensor provided on the base 31 side, respectively. The mechanical valve 66 engages with the dog 64, and the photoelectric sensor 67 engages with the dog 65, both of which are used for controlling the rotational drive.

The operation of the rotary transport device 30 configured as described above will be described. Here, the workpiece is rotated (revolved) between the painting position and the transport position using the transport table.
The workpiece is conveyed, and an operation of rotating (rotating) the workpiece mounting table at each position is performed.

First, the workpiece 1 is mounted on the workpiece mounting table 33 (or 34) at the transport position by the operator. The stroke of the rod of the air cylinder 50 is reduced, the ring plate 49 is lowered, and the cylindrical joint 48 is moved to the lower limit position.
(1st position). Thereby, the cylindrical joint 4
The notch hole provided in the flange portion 48a of No. 8 is engaged with the key 42 provided in the flange portion 39a of the spline hub 39. The output shaft 38 of the reduction gear unit 36 is connected to the transfer table 32 via a spline hub 39, a cylindrical joint 48, and a rotating shaft 47. When the servo motor 35 is started. The output shaft 38, the spline hub 39, the cylindrical joint 48, and the rotary shaft 47 rotate to rotate the transfer table 32.
Rotate about the rotation shaft 47. Then, the motor 35 is rotated at a position where the transport table 32 is rotated by 180 °.
Is stopped, and the rotation of the transfer table 32 is also stopped. As a result, the positions of the workpiece mounting tables 33 and 34 are alternated around the rotation shaft 47 at an angle of 180 °. As a result, the workpiece mounting tables 33 and 34 move on the same circular locus drawn about the center axis of the rotating shaft 47. That is, for example, one work placement table 33 moves from the transfer position to the processing position, and the other work placement table 34 moves from the processing position to the transfer position.

Next, the stroke of the rod of the air cylinder 50 is extended to raise the ring plate 49 to move the cylindrical joint 48 upward to the upper limit position (second position). As a result, the flange portion 48a of the cylindrical joint 48 is keyed.
42 and a stopper 5 provided on the rod.
0a is engaged with a tapered hole 47d provided in the flange portion 47c of the rotating shaft 47. For this reason, the transport table 32 is stopped at that position so as not to rotate, and is restrained by the base 31.

Here, the cylinder 45 extends the stroke of the rod by means of, for example, a mechanical valve 66, moves the lifter plate 43 downward, moves the spline shaft 40 downward through the bearing 46, and moves the gear 41 provided at the upper end thereof. It descends and meshes with the gear 57 of the transmission mechanism 51. At this time, the ratchet wheel 63 moves downward due to the downward movement of the spline shaft 40, separates from the ratchet wheel 59 of the transmission mechanism 51, and meshes with the ratchet wheel 60 of the transmission mechanism 52. As a result, the transmission mechanism 52 and the work table 34 are restrained from rotating. In this state, the servo motor 35 is driven, and the output shaft 38, the spline hub 39, the spline shaft 4
The workpiece placing table 33 is rotated at a required angle via the gear 41, the gear 41 and the transmission mechanism 51. The workpiece 1 placed on the workpiece mounting table 33 moved to the processing position is painted. The workpiece mounting table 34 moved to the transport position is restrained by the ratchet wheel 60 so as not to rotate. During this time, for example, the operator lowers the processed workpiece 1 placed on the workpiece mounting table 34 that has returned to the transport position, and newly places the workpiece 1 before processing. .

When the processing of the workpiece 1 at the processing position is completed, the stroke of the rod of the cylinder 50 is reduced again, and the cylindrical joint 48 is moved downward through the ring plate 49 to the lower limit position (first position). The notch hole of the flange portion 48a of the cylindrical joint 48 is engaged with the key 42 of the spline hub 39, and the stopper 50a is disengaged from the tapered hole 47d provided in the flange portion 47c of the rotating shaft 47. As a result, the constraint of the transport table 32 is released.

Next, the motor 35 is rotated at a position where the transport table 32 is rotated at an angle of 180 ° about the rotation shaft 47.
Is stopped, and the rotation of the transfer table 32 is also stopped. As a result, the workpiece mounting tables 33 and 34 move on the same circular locus drawn around the center axis of the rotary shaft 47 at an angle of 180 ° and return to the original position.

Next, the stroke of the rod of the air cylinder 50 is extended to raise the ring plate 49 and move the cylindrical joint 48 upward to the upper limit position. As a result, the flange portion 48a of the cylindrical joint 48 is detached from the key 42, and the stopper 50a is engaged with the tapered hole 47d provided in the flange portion 47c of the rotating shaft 47. For this reason,
The transport table 32 is stopped at that position and restrained so as not to rotate again.

Here, the cylinder 45 moves the lifter plate 43 upward by shortening the stroke of the rod.
The spline shaft 40 is moved upward through 6 so that the gear 41 provided at the upper end of the spline shaft 40 meshes with the gear 58 of the transmission mechanism 52. At this time, the ratchet wheel 63 moves upward by the upward movement of the spline shaft 40, and the ratchet wheel 60 of the drive transmission mechanism 52 moves.
From the transmission mechanism 51 and mesh with the ratchet wheel 59 of the transmission mechanism 51. Thereby, the drive transmission mechanism 51 and the work table 33 are restrained from rotating. In this state, the servo motor 3
5, the workpiece mounting table 34 is rotated at a required angle via the output shaft 38, the spline hub 39, the spline shaft 40, the gear 41 and the transmission mechanism 52. The work table 33 is restrained by a ratchet wheel 59 so as not to rotate. During this time, the processed workpiece I placed on the workpiece mounting table 33 returned to the transport position is lowered by the operator, and the workpiece I before processing is newly placed.

In this way, the above operation is repeated and the operation proceeds.

As described above, the rotary transfer device 30 includes the transfer table and the two work mounting tables 33 and 34,
The gears are selectively connected and rotated by using a reduction gear unit 36 driven by one drive servomotor 35 provided in the unit 1 and two cylinders 45 and 50. That is, power for rotating the transfer table is taken out from the output shaft 38 of the reduction gear unit 36, and two workpiece mounting tables are provided from a spline shaft 40 slidably engaged with a spline hub 39 provided on the output shaft 38. Power for rotation of 33 and 34 is taken out.
Between the spline hub 39 and the transfer table 32, there is provided a joint cylinder 48 which constitutes a meshing clutch for transmitting power and a stopper for preventing rotation, and is attached and detached by an air cylinder 50. In addition, the spline shaft 40 and the work table 3
Gears 41, 57, 58 for selecting the mounting tables 33, 34 and transmitting power, and ratchet wheels 59, 60, 63, which are meshing clutches for preventing rotation, are provided between the air cylinders 3 and 34. Attach and detach with 45. The rotation is controlled by mechanically detecting the position using a cam-shaped dog fixedly mounted on the rotation shaft of the transfer table.

Accordingly, in the rotary transfer device 30, the transfer table 32 and the two work tables 33, 34 are driven by the reduction gear unit 36 driven by one electric motor and the two cylinders 45, 50. Are rotated independently of each other, so that the number of mechanisms constituting the apparatus is small compared to the conventional apparatus, and the cost of these mechanisms is low, and as a result, the cost of the entire apparatus is low. In addition, this rotary transfer device 3
0 indicates that the work table at the transfer position is rotated only when necessary and not rotated at other times, and is alternately rotated and stopped at other times. It can be ensured that the mounting tables 33 and 34 do not rotate, and the servomotor 35 can be disposed in the base 31 away from the processing position where environmental conditions are poor, which is suitable for explosion-proof specifications. Therefore, according to the present invention, it is possible to obtain a very economical rotary transfer apparatus for a workpiece which has excellent functions, uses no expensive mechanism, and reduces the number of mechanisms.

In the rotary transport device 30, the rotary shaft 47 for the transport table and the output shaft 38 of the reduction gear unit 36 are each formed in a cylindrical shape and are arranged on the same axis, and the rotary shaft for the transport table is provided. Spline shaft 40 serving as a selective transmission means of the transmission mechanism
And a coupling 48 which is inserted into the inside of the output shaft 38 and is linked to the output shaft 38, and has a cylindrical shape so that it can move between the first position and the second position on the outer peripheral side of the rotating shaft 47. Is provided. Accordingly, in the rotary transport device 30, the rotary shaft 47 for the transport table, the output shaft 38 of the reduction gear unit 36, the selection transmitting means of the rotary transmission mechanism for the transport table, and the joint 48 are used as the rotary transport device for the workpiece. The apparatus is configured to be small and capable of performing a predetermined operation stably, and the image forming apparatuses are combined to be small and capable of performing a predetermined operation stably.

Further, according to the present invention, the first selection driving means and the second selection driving means are provided in the cylinders 45, 5, respectively.
O, for example, by using an air cylinder, it is possible to obtain a suitable configuration which is small and very suitable for performing a predetermined operation stably for the rotary transfer device of the present invention.

The present invention is not limited to the above-described embodiment, but can be implemented with various modifications.

[0043]

According to the rotary transfer device for workpieces of the present invention, a transport table and two workpiece mounting tables are provided by a reduction gear unit driven by one electric motor and two air cylinders. Are rotated independently of each other, so that the structure is simple and can contribute to reduction of cost. In addition, the work table at the transfer position can be guaranteed not to rotate, and the servo motor is installed in the base far from the processing position where environmental conditions are poor. Suitable for specifications. Therefore, according to the present invention, it is possible to obtain a very economical rotary transfer device for a workpiece which has excellent functions, uses no expensive mechanism, and reduces the number of mechanisms.

Further, in the rotary conveying device for the workpiece,
The rotation shaft for the transfer table, the output shaft of the reduction gear unit, the transmission selection means of the rotation transmission mechanism, and the joint are configured and combined with each other so that the image forming apparatus is small and can perform a predetermined operation stably.

Further, the first selection driving means and the second selection driving means can be respectively configured appropriately.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing a rotary transport device according to an embodiment of the present invention.

FIG. 2 is a plan view showing the rotary conveyance device in the embodiment.

FIG. 3 is a cross-sectional view showing the rotary conveyance device in the embodiment.

FIG. 4 is a view showing a dog provided in the rotary conveyance device in the embodiment.

FIG. 5 is a sectional view showing a dog provided in the rotary transport device according to the embodiment.

FIG. 6 is a diagram schematically showing a configuration of a conventional rotary transfer device.

FIG. 7 is a diagram showing a control system of a conventional rotary transfer device.

FIG. 8 is an explanatory view showing an operation of a workpiece mounting table of the conventional rotary transfer device.

[Description of Signs] 31 ... Base, 32 ... Transfer table, 33 ... Workpiece mounting table, 34 ... Workpiece mounting table, 35 ... Servo motor, 36 ... Reduction gear unit, 38 ... Output shaft, 39 ... Spline Hub, 40: Spline shaft, 41: Gear, 45: Air cylinder, 48: Cylindrical joint, 50: Air cylinder, 51: Drive transmission mechanism, 52: Drive transmission mechanism.

Claims (3)

[Claims] A transfer table having a base, a plurality of workpiece mounting tables rotatably provided at positions distributed in a circumferential direction of rotation, and a rotation for rotatably supporting the transfer table on the base. Shaft, a reduction gear unit having an electric motor provided on the base and an output shaft for transmitting the rotation of the electric motor, and a space between the output shaft of the reduction gear unit and each work table of the transfer table. A rotation transmission mechanism provided in linkage with transmission selection means for selecting linkage between the output shaft and each of the workpiece mounting tables at an intermediate stage; a rotation shaft for the transfer table and an output shaft of the reduction gear unit And a joint for selectively connecting the rotary shaft for the transfer table and the base, and a first connecting the joint between the rotary shaft for the transfer table and the output shaft of the reduction gear unit.
A first selection drive unit for selecting and moving a position of the transfer table and a second position for connecting the rotary shaft for the transfer table and the base; and reducing the transmission selection unit of the rotation transmission mechanism for the transfer table to the deceleration. A second selection drive unit for selecting and moving an associated position between an output shaft of a gear unit and each of the workpiece mounting tables, and a rotary conveyance device for the workpiece. 2. The transfer table rotating shaft and the output shaft of the reduction gear unit are each formed in a cylindrical shape and are arranged side by side on the same axis, and the selection transmitting means of the rotation transmitting mechanism is provided for the transfer table. The joint is inserted into the inside of the rotating shaft and the output shaft, is linked to the output shaft, and the joint has a cylindrical shape and is movably fitted to the outer peripheral side of the rotating shaft. 2. The rotary conveying device for a workpiece according to 1. 3. The first selection driving means and the second selection driving means.
2. The apparatus according to claim 1, wherein each of the selection driving means is a cylinder.