JP2558092B2 - Swivel - Google Patents

Description

Description: [Industrial field of use] The present invention relates to a turning device suitable for turning transfer of parts and the like.

[Prior Art] A swivel device enables swivel transfer of components by swiveling a component or the like supplied to a peripheral portion of a swivel table to a predetermined indexing position of the swivel table. Conventionally, various types of turning devices have been adopted, for example, a turning device having a frame and a turning table rotatably supported by the frame and having an electric motor capable of applying a driving force to the turning table. is there. This turning device has a cam mechanism interposed between a turning table and a drive shaft of an electric motor, and the turning operation of the cam mechanism allows the turning table to turn to a predetermined indexing position.

However, in the case of a turning device equipped with such a cam mechanism, since the mechanism is complicated, it is difficult to cope with a change in the stop position of the turning table due to a change in the number of indexes or the like.

Therefore, conventionally, in order to easily deal with the change of the stop position of the turning table, the turning drive of the turning table is performed by a pulse motor, and the drive control of the pulse motor causes the turning table to stop or stop. Are controllable. According to such a system, it is possible to easily deal with a change in the number of indexes due to a change in the use of the turning device, and it is possible to generalize the use of the turning device.

[Problems to be Solved by the Invention] However, in the case where the turning drive of the turning table is performed by a pulse motor and the stop position of the turning table is diversified by the control of the pulse motor, a circuit for control, such as a pulse, is used. There is a problem that a circuit configuration becomes complicated because a generation circuit, an arithmetic circuit, etc. are required. Therefore, the entire apparatus is inevitably expensive.

In the turning device, it is desired not only to simplify the device structure, but also to maintain the stopping accuracy of the turning device against vibration or to easily determine the stop position of the turning device.

INDUSTRIAL APPLICABILITY The present invention makes it possible to diversify the stop positions of the revolving table by a simple operation, while maintaining the stopping accuracy of the revolving device while simplifying the device structure, and easily determining the set stop position of the revolving device. An object is to provide a turning device.

[Means for Solving the Problems] The present invention provides a turning device including a frame, a turning table rotatably supported by the frame, and an electric motor capable of applying a turning drive force to the turning table, The swivel table is provided with a plurality of pin mounting screw hole portions on the same circumference, and among the plurality of pin mounting screw hole portions, a pin mounting screw hole portion selected in accordance with a stop position of the swivel table. The threaded portion below the head of the index pin is screwed onto the head of the indexing pin, the head of the indexing pin is located on the front side of the turning table, and the detected portion below the threaded portion of the indexing pin is located on the back side of the turning table. A single detection switch for detecting the index pin is arranged on the movement locus of the detected portion of the index pin accompanying the rotation of the turning table in the frame. A control circuit for shutting off the drive circuit of the electric motor by detecting the index pin by the output switch is provided.

[Operation] According to the present invention, there are the following operations.

Depending on the desired stop position of the swivel table, you can stop the swivel table at that position simply by screwing the index pin into the corresponding pin mounting screw hole, and the pin mounting screw that screws the index pin Since the stop position of the turning table can be changed by changing the hole, the stop position of the turning table can be diversified by a simple operation.

As a detection switch that issues a signal to cut off the drive circuit of the electric motor, regardless of the number of stop positions of the turning table, a single detection switch may be arranged on the movement locus of the index pin. Can be simplified.

Since the threaded portion of the index pin is fixedly supported on the turning table by being screwed into the threaded hole portion of the turning table, the index pin is less likely to be displaced even with vibration, and the stopping accuracy can be maintained. .

Since the head of the index pin is located on the surface side of the swivel table, the mounting state of the index pin can be easily checked and the position at which the swivel table is set to be stopped can be easily determined.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a turning device according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of the turning device shown in FIG. 1, and FIG. 3 is a first III-III line. 4 is a circuit diagram of the turning device shown in FIG. 1.

As shown in FIG. 1, the revolving device 10 has an overall columnar shape, and has a revolving table 12 on the upper surface of a columnar casing 11. The swivel table 12 is rotatable with respect to the housing 11 in the direction of the arrow A, and the swivel table 12 has a disk shape as shown in FIG. On the bottom inside the case 11,
A frame 13 is supported, and a radial bearing portion 14 is supported at a position corresponding to the center of the cylindrical casing 11 in the frame 13. The bearing portion 14 rotatably supports a shaft 15 arranged with its axis line in the vertical direction, and a gear 16 is mounted on the upper end portion of the shaft 15. The lower end portion of the shaft 15 can be supported by a thrust bearing portion 17 arranged at the center position of the bottom surface inside the housing 11, and the shaft 15 can rotate with respect to the housing 11. On the upper surface of the flange portion 18 of the gear 16, a disc-shaped turning table is provided.
Twelve can be installed. That is, the flange portion 18 is provided with a screw hole 19, and each screw 21 is screwed into the screw hole 19 of the flange portion 18 while the screw 21 is inserted into the insertion hole 20 formed in the turning table 12. There is. As a result, the turning table 12 can be mounted on the flange portion 18. In addition,
A hole 22 is formed at the center of the turning table 12, and the upper end of the shaft 15 can be inserted into the hole 22. As a result, the center position of the revolving table 12 is appropriately positioned around the shaft 15.

An electric motor 24 can be mounted on the electric motor support portion 23 of the frame 13. A speed reducer 25 is integrally attached to the electric motor 24, and an output shaft 26 rotated by the drive of the electric motor 24 is provided above the speed reducer 25. This output shaft 26 has
The pinion 27 is mounted, and the pinion 27 and the gear 16 are the third
As shown in the figure, the meshing state is established. This allows the electric motor 24
When the pinion 27 is driven and the pinion 27 is rotated, the gear 16 is rotated, and the revolving table 12 can be rotated in the arrow A direction. That is, the electric motor 24 can apply a turning drive force to the turning table 12.

At the circumferential position of the turning table 12 in the rotation direction [direction A],
Eight pin mounting holes 28 are provided at positions for indexing the disc-shaped turning table 12, respectively. Each hole 28 is
As shown in FIG. 3, a counterbore 29 and a screw hole 30 are provided, and an index pin 31 is detachably attached to each hole 28. The index pin 31 is provided with a head portion 32 at the upper end, the lower portion of the head portion 32 is a screw portion 33, and the lower portion thereof is a detected portion 34, and the mounting of the index pin 31 in the hole portion 28 is performed by the detected portion 34. Is performed by screwing the screw portion 33 and the screw hole 30 in a state in which is positioned inside the housing 11 on the back surface side of the turning table 12. In this state, the head 32 is positioned inside the counterbore 29 on the front surface side of the turntable 12.

That is, the swivel table 12 is provided with a plurality of pin mounting hole portions 28 on the same circumference, and among the plurality of pin mounting hole portions 28, the pin mounting hole selected according to the stop position of the swivel table 12 is provided. Index pin 31 to screw hole 30 of part 28
The screw part 33 below the head part 32 of the index pin 31 is screwed, the head part 32 of the index pin 31 is located on the surface side of the swivel table 12, and the detected part 34 below the screw part 33 of the index pin 31 is the swivel table 12. It is arranged on the back side of.

A single detection switch 35 capable of detecting the index pin 31 is attached by a screw 36 on the movement locus of the detected portion 34 of the index pin 31 accompanying the rotation of the revolving table 12 in the frame 13. The detection switch 35 is provided with a tongue piece 37 that can come into contact with the detected portion 34 of the index pin 31 so that the tongue piece 37 can come into contact with the index pin 31 in a non-projecting direction [ B direction]. That is, the detection switch 35 is capable of detecting the index pin 31 by the contact between the detected portion 34 of the index pin 31 and the tongue piece 37. As a result, the position of the turning table 12 in the rotation direction can be confirmed.

Next, the drive circuit of the electric motor 24 and its control circuit in the turning device 10 will be described with reference to FIG.

The electric motor 24 capable of applying a driving force to the turning table 12 through the engagement of the gear 16 and the pinion 27 can be driven by the DC power supply 40, and the turning start switch 41 is turned on for driving the turning table 12. Be started by. The drive start switch 41 is provided in a closed circuit 43 composed of a DC power supply 40 and a relay device 42.
When 41 is turned on, an exciting current can be passed through the relay device 42. The relay device 42 includes a motor 24 and a DC power source 40.
It is possible to turn on each of a relay switch 45 provided in a closed circuit 44 configured by and a detection switch 35, a DC power supply 40, and a relay switch 47 provided in a closed circuit 46 configured by a relay device 42. There is.
That is, when the drive start switch 41 is turned on and the exciting current flows through the relay device 42, the relay switches 45 and 47 are turned on.
Is turned on. In this state, current flows through the closed circuit 44 and the electric motor 24 is driven. When the electric motor 24 is driven, the turning table 12 is rotated in the direction of arrow A.

On the other hand, the detection switch 35 of the closed circuit 46 can be turned on / off by the contact between the detected portion 34 of the index pin 31 and the tongue piece 37, and the detection switch 35 is always turned on when the turning table 12 rotates. It is said that. When the turning table 12 is rotated and the detected portion 34 of the index pin 31 and the tongue piece 37 are brought into contact with each other, the detection switch 35 detects the index pin 31 and is turned off. Then, the exciting current flowing through the relay device 42 is turned off, and the relay switches 45 and 47 are turned off. When the relay switch 45 is turned off, the current flowing from the DC power supply 40 to the electric motor 24 is cut off. The relay switch 45 is connected to the off contact 48 when the relay switch 45 is off, and by the connection, a short circuit 49 that allows the winding of the electric motor 24 to be short-circuited is configured. That is, when the relay switch 45 is connected to the OFF contact 48 and the winding of the electric motor 24 is short-circuited, a short-circuit current flows in the winding, and the electric motor 24 is brought into an electromagnetic braking action. This allows the electric motor 24
Will be in a state of being rapidly stopped.

In this way, the turning table 12 is rotated by turning on the drive start switch 41, and the index pin is rotated.
It is stopped at the position where 31 and the tongue piece 37 of the detection switch 35 come into contact with each other. When the drive start switch 41 is turned on again, an exciting current flows through the relay device 42, and the turning table 12 starts rotating. The rotation of the revolving table 12 releases the contact between the tongue piece 37 and the index pin 31. As a result, even if the drive start switch 41 is turned off, the rotation of the revolving table 12 causes the next index pin 31 to contact the tongue piece 37. Maintained up to. As a result, the turning table 12 becomes
It becomes possible to stop at the mounting positions of the eight index pins 31 at the peripheral positions of the above, and by attaching and detaching the index pins 31, it becomes possible to change the stopping position of the turning table 12.

Further, if the drive start switch 41 is kept in the ON state, the closed circuit 43 is kept closed, and the index pin 31 keeps the relay device 42 energized regardless of the ON / OFF operation of the detection switch 35. As a result, the electric current is continuously supplied to the electric motor 24, so that the turning table 12 is continuously rotated while passing the index pin 31. Therefore, the turning table 12 can be continuously rotated at an arbitrary rotation speed (for example, 3.4 rotations) by adjusting the on-state duration time of the drive start switch 41 with a timer or the like.

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

By turning on the drive start switch 41, the rotation of the turning table 12 is started, and the turning table 12 is stopped by the contact between the index pin 31 and the tongue piece 37 of the detection switch 35. Since the index pin 31 is attachable to and detachable from the circumferential position of the revolving table 12, it is possible to easily and freely change the stop position of the revolving table 12 by changing the mounting position of the index pin 31. As a result, the stop position of the turning table 12 in the turning device 10 can be diversified by a simple operation.
Further, regardless of the number of stop positions of the turning table 12, the index pin 31 is detected by the single detection switch 35,
Since the electric motor 24 is configured to be stopped by the detection signal, the structure of the turning device 10 can be simplified.
Further, in this embodiment, the electric motor 24 is
The short circuit 49 for short-circuiting the winding of the motor 24 is connected, the detection switch 35 detects the index pin 31, and when the current supply to the motor 24 is cut off, the winding of the motor 24 is short-circuited. . As a result, the electric motor 24 is rapidly stopped. As a result, the turning table 12 can be reliably stopped at the mounting position of the index pin 31.

In addition, the index pin 31 has a threaded portion 33 screwed into the screw hole portion 30 of the swivel table 12 so that the swivel table 12 can be rotated.
Since it is fixedly supported by 12, it is difficult to cause positional displacement even with vibration, and the stopping accuracy can be maintained.

In addition, the head 32 of the index pin 31 is the turning table 12
Since it is located on the front surface side, it is possible to easily confirm the mounting state of the index pin 31 and easily determine at which position the turning table 12 is set to be stopped.

FIG. 5 shows a circuit diagram of a turning device according to a second embodiment of the present invention. Unlike the circuit of the swivel device 10 according to the above-described embodiment, the circuit of the swivel device 50 has separate power supplies for driving the electric motor 24 and the relay device 42. As a result, the motor 24 and the power supply 51 for driving the motor 24 form one closed circuit 52, and the detection switch 35, the relay device 42, and the power supply 53 for driving the relay device 42.
By this, one closed circuit 54 is configured. As a result, the power supplies 51 and 53 can be rated differently, and either one can be used as an AC or DC power supply. The closed circuit 54 is provided with a drive start switch 55, the closed circuit 52 is provided with a relay switch 56, and the closed circuit 54 is provided with a relay switch 57. Each of the relay switches 56 and 57 is turned on by turning on the drive start switch 55, and the turning table 12 can be rotated. The rest of the configuration and operation are the same as those of the above-mentioned embodiment, and the explanation thereof is omitted.

FIG. 6 is a circuit diagram of a turning device according to a third embodiment of the present invention. The swivel device 60 relates to a modification of the swivel device 50 according to the second embodiment, and is separately provided with a power source for driving the electric motor 24 and a power source for driving the relay device. The power supply 61 for driving the electric motor 24 is a DC power supply, and the power supply 62 of the relay device 42 is an AC power supply. The closed circuit 52 is provided with a changeover switch 63 capable of converting the polarity of the current flowing from the power supply 61 to the electric motor 24, and the changeover switch 63 is changed over by a relay device 65 operated by a command from the microcomputer 64. Made possible. As a result, the turning table 12 can rotate in both forward and reverse directions, and the switching of the rotating direction can be controlled by the microcomputer 64.

Further, the drive start switch 55 is provided with a relay device 67 which is operated by a command from the microcomputer 66,
By operating the relay device 67, the time for which the drive start switch 55 is in the ON state can be adjusted, and the stop position of the turning table 12 is adjusted. As a result, it becomes possible to adjust the turning table 12 so as to rotate it by a predetermined amount. A capacitor 68 is provided in the short circuit 49. The capacitor 68 is for preventing the electric noise generated from the electric motor 24 from entering the microcomputers 64 and 66, and thus can prevent the malfunction of the microcomputers 64 and 66.
Other configurations and operations are the same as those in the above-mentioned respective embodiments.

[Effects of the Invention] As described above, according to the present invention, the stopping position of the turning table can be diversified by a simple operation, and the turning accuracy of the turning device can be maintained while the device structure is simplified and the turning device can be maintained. The stop position can be easily determined.

[Brief description of drawings]

1 is a perspective view showing a swivel device according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of the swivel device shown in FIG. 1,
FIG. 3 is a sectional view taken along the line III-III of FIG. 1, and FIG.
FIG. 5 is a circuit diagram of the turning device shown in FIG. 5, and FIG. 5 is a circuit diagram similar to FIG. 4 of the turning device according to the second embodiment of the present invention.
The drawing shows a fourth example of the turning device according to the third embodiment of the present invention.
It is a circuit diagram similar to a figure. 10,50,60 …… Swivel device, 12 …… Swivel table, 13 …… Frame, 24 …… Motor, 28 …… Pin mounting hole, 30 ……
Screw hole, 31 …… Index pin, 32 …… Head, 33…
… Screw part, 34 …… Detected part, 35 …… Detection switch, 49…
… Short circuit.

Claims (1)

(57) [Claims] 1. A turning device comprising a frame, a turning table rotatably supported by the frame, and an electric motor capable of applying a turning drive force to the turning table, wherein the turning table has the same circle. A plurality of pin mounting screw hole portions are provided on the circumference, and a pin mounting screw hole portion selected according to the stop position of the revolving table among the plurality of pin mounting screw hole portions is provided below the head of the index pin. The screw part is screwed on, the head of the index pin is located on the front side of the swivel table, and the detected part below the screw part of the index pin is arranged on the back side of the swivel table to prevent the swivel table from rotating in the frame. A single detection switch for detecting the index pin is arranged on the movement locus of the detected portion of the index pin, and the index switch detects the index pin. Turning apparatus characterized by comprising a control circuit for interrupting the drive circuit of the motor by the detection of the pin.