JPH079864U - Axis drive - Google Patents

Abstract

(57) [Summary] [Purpose] Automatically control the mechanical resistance applied to the guide roller. A pulse generator 10 and a rotation speed detector 12 are engaged with a guide shaft 3 fixed to a guide roller 2, and a pulse generator 11 is attached to a motor 6 fixed to a bearing case 4 via a coupling 7. The rotation speed detector 13 is fixed.
Thereby, the electric signal of the set value arbitrarily set by the setting means 9 and the electric signal of the rotation speed of the guide roller 2 detected by the rotation speed detector 12 are added and sent to the motor control means 8. , An electric signal of the rotation speed of the motor 6 detected by the rotation speed detector 13 is supplied to the motor control means 8
Since the speed feedback control of the motor 6 can be performed by sending to the motor, the mechanical resistance applied to the guide roller 2 can be automatically controlled.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a shaft driving device, and more particularly to a shaft driving device applied to a guide roller which is a free roller for changing the traveling direction of a wire and guiding the wire.

[0002]

[Prior art]

 Conventionally, in a system for pulling a wire with a constant tension in order to manufacture and process an electric wire, especially a thin wire, the tension of the wire is adversely affected by a guide roller that changes the traveling direction of the wire and guides the wire. To avoid this, the guide roller is equipped with a shaft drive.

As shown in FIG. 3, such a shaft driving device includes a guide roller 22 to which a guide roller shaft 23 is fixed, a bearing case 24 that holds the guide roller shaft 23, and a coupling 27 in the bearing case 24. The motor 26 is fixed via the motor 26, the motor control means 28 for controlling the motor 26, and the setting means 29 connected to the motor control means 28 for setting the rotation speed of the motor 26.

Since the bearing 25 is internally provided in the bearing case 24 and the guide roller 22 is held by the bearing 25, the guide roller 22 can be freely rotated. Further, the set value of the motor control means 28 determined by the setting means 29 is fixed. Therefore, when the predetermined setting value is set, the bearing case 24 fixed to the motor 26 via the coupling 27 always rotates at the same rotation speed.

[0005]

[Problems to be solved by the device]

 However, since the rotation speed of the bearing case 24 is set by the setting value of the motor control means 28 which is determined by the setting means 29 regardless of the rotation speed of the guide roller 22, when the wire rod S is manufactured or processed, the guide speed is set. If the rotation speed of the roller 22 changes, the tension of the wire rod S or the like will be adversely affected.

For example, when the wire rod S hanging on the guide roller 22 is thin, the resistance by the bearing 25 provided in the bearing case 24 becomes large, and therefore the motor 26 is controlled to reduce the resistance by the bearing 25. Then, the number of rotations of the bearing case 24 and the guide roller 22 is adjusted. However, when the number of rotations of the bearing case 24 becomes higher than the number of rotations of the guide roller 22 during the manufacturing and processing of the wire rod S, the wire rod S is subjected to a pulling force. On the other hand, if the rotation speed of the bearing case 24 becomes slower than the rotation speed of the guide roller 22, the bearing 25 does not apply resistance, and the merit of the shaft drive device 21 cannot be fully exerted.

Therefore, when the rotation speed of the guide roller 22 changes, the tension of the wire S or the like may be adversely affected. Also, since it is a device that is effective only when it is desired to simply reduce the bearing resistance, it was difficult to use it for precise traveling systems.

[0008]

【Purpose】

 The present invention has been made to solve such conventional problems, and an object of the present invention is to provide a shaft drive device that automatically controls mechanical resistance applied to a guide roller.

[0009]

[Means for Solving the Problems]

 The shaft driving device of the present invention which achieves such an object includes a guide roller for guiding the wire rod, a holding mechanism for holding the guide roller in a rotatable manner via a guide shaft fixed to the guide roller, In a shaft driving device including a motor that is directly connected to the holding mechanism and that rotates the holding mechanism, and a motor control unit that controls the motor, a first rotation speed detection unit that detects the rotation speed of the guide shaft by a pulse signal, and a motor. Second rotation speed detecting means for detecting the rotation speed of the motor by a pulse signal, and setting means for maintaining the rotation speed of the guide roller and the holding mechanism at a constant rotation speed ratio, and the motor control means has the first rotation speed. The rotation speed of the holding mechanism is controlled based on the detection signals of the detection means and the second rotation speed detection means and the setting signal from the setting means.

[0010]

[Action]

 When the wire rod hung on the guide roller moves in a certain direction, the guide roller rotates accordingly. The rotation speed of the guide roller is detected by the first rotation speed detecting means engaged with the guide shaft, and the detection result is sent to the motor control means. The motor control means controls the rotation speed of the motor to which the holding mechanism is directly connected based on the detection result. Further, since the rotation speed of the motor is monitored by the second rotation speed detection means fixed to the motor, the motor is operated while maintaining the rotation speed ratio of the guide roller and the holding mechanism determined by the setting means. It can be rotated.

As a result, the mechanical resistance applied to the guide roller can be automatically controlled based on the set value set by the setting means, so that the guide roller can also be used in a precise traveling system.

[0012]

【Example】

 An embodiment of the shaft driving device of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the shaft driving device of the present invention includes a guide roller 2 to which a guide roller shaft 3 is fixed, a bearing case 4, and a bearing case 4 which is a holding mechanism for holding the guide roller shaft 3. A motor 6 fixed to the bearing case 4 via a coupling 7 for rotating the bearing case 4, a motor control means 8 for controlling the motor 6, and a motor control means 8 connected to the motor 6 to rotate the motor 6. It comprises a setting means 9 for setting the number.

A pulse generator 10 and a rotation speed detector 12 which are first rotation speed detecting means are engaged with the guide roller shaft 3 of the shaft driving device 1 and a second rotation speed is applied to the motor 6. The pulse generator 11 and the rotation speed detector 13, which are detection means, are fixed. The pulse generator 10 outputs a feedback pulse in conjunction with the guide roller shaft 3 fixed to the guide roller 2, and the rotation number detector 12 detects the rotation number of the guide roller shaft 3 based on this output signal. The rotation speed detector 12 which detects the rotation speed of the guide roller shaft 3 converts the rotation speed of the guide roller shaft 3 into an electric signal (detection signal), and sends this electric signal to the motor control means 8.

On the other hand, the pulse generator 11 is provided for monitoring the rotation speed of the motor 6, outputs a feedback pulse in conjunction with the motor 6, and detects the rotation speed of the motor 6 based on this output signal. It is detected by the device 13. The rotation speed detector 13 which detects the rotation speed of the motor 6 converts the rotation speed of the motor 6 into an electric signal (detection signal), and sends this electric signal to the motor control means 8 to feed back the speed of the motor 6. You can take control.

The bearing case 4 rotatably holds a guide roller 2 to which a guide roller shaft 3 is fixed via a bearing 5. As a result, the guide roller 2 can rotate with the movement of the wire rod S hooked on the guide roller 2. The setting means 9 can set the rotation speed of the guide roller 2 fixed to the guide roller shaft 3 and the rotation speed of the motor 6 directly connected to the bearing case 4 to a constant rotation speed ratio. That is, the electric signal of the set value (setting signal) arbitrarily set by the setting means 9 and the electric signal of the rotation speed of the guide roller 2 detected by the rotation speed detector 12 are added and sent to the motor control means 8. Therefore, the rotation speed of the motor 6 can be automatically controlled. For example, when the setting value of the setting means 9 is set to 0, the guide roller 2 and the bearing case 4 can be rotated at the same rotation speed. As a result, the shaft drive device 1 can have extremely low mechanical resistance.

On the other hand, when changing the set value, when the number of rotations of the guide roller 2 is N and the number of rotations of the bearing case 4 is n, the characteristic of n = N ± α can be given, and therefore the setting can be made. By setting the means 9, it is possible to provide a difference in the number of rotations between the guide roller 2 and the bearing case 4. This makes it possible to adjust the mechanical resistance by providing a minute rotational speed difference with respect to the wire rod S in the pulling direction or the braking direction, and thus it can be used as a means for selecting a more precise mechanical resistance value.

A comparative test is performed between the shaft driving device 1 configured as described above and a conventional shaft driving device, that is, a shaft driving device that does not include the pulse generators 10 and 11 and the rotation speed detectors 12 and 13. It was In the comparative test, the resistance value applied to the wire rod S when the rotation speed N was changed was measured. As shown in FIG. 2, in the conventional shaft drive device, the resistance value of the resistance applied to the wire rod S changed significantly with the change in the rotation speed of the guide roller. On the other hand, in the shaft drive device 1 of the present embodiment, the resistance value of the resistance applied to the wire S could be kept constant even if the rotation speed of the guide roller 2 was changed. This is because the bearing case 4 can be made to follow the same rotation speed as the guide roller 2 by automatically detecting the rotation speed of the guide roller 2 by the rotation speed detector 12.

By changing the set value of the setting means 9, it is possible to adjust the mechanical resistance value from the outside, so that the tension of the wire rod or the like will not be adversely affected even if it is adopted in a precise traveling system. Never give. Further, in this embodiment, the guide roller 2 whose rotation speed is variable is provided with the shaft driving device 1. However, the present invention is not limited to this, and if the guide roller 2 having a constant rotation speed is provided with the shaft driving device 1, the wire rod S is not provided. It is possible to stabilize the tension of the wire rod S when the take-up system is started and stopped.

[0019]

[Effect of device]

 As is apparent from the above embodiments, the shaft drive device of the present invention is fixed to the first rotation speed detecting means engaged with the guide shaft fixed to the guide roller and the motor directly connected to the holding mechanism. Since the holding mechanism can be forcedly and automatically provided with appropriate rotation by providing the second rotation speed detecting means, the resistance applied to the wire at any rotation speed of the guide roller can be reduced. It can be kept as small as possible. Therefore, the mechanical resistance applied to the guide roller can be automatically controlled.

[Brief description of drawings]

FIG. 1 is a detailed view showing a shaft driving device of the present invention.

FIG. 2 is a graph showing the relationship between the rotational speed of the guide roller and the resistance value applied to the wire rod of the shaft driving device of the present invention and the conventional shaft driving device.

FIG. 3 is a detailed view showing a conventional shaft drive device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Shaft drive device 2 ... Guide roller 3 ... Guide roller shaft 4 ... Motor 5 ... Bearing 6 ... Bearing case (holding mechanism) 7 ... Coupling 8 ... Motor control means 9 ... Setting means 10, 11 ... Pulse generator 12, 13 ... Rotation speed detector S ... Wire rod

Claims (1)

[Scope of utility model registration request] 1. A guide roller for guiding a wire rod, a holding mechanism for rotatably holding the guide roller via a guide shaft fixed to the guide roller, and a holding mechanism directly connected to the holding mechanism. In a shaft drive device comprising a motor for rotating a mechanism and a motor control means for controlling the motor, a first rotation speed detecting means for detecting a rotation speed of the guide shaft by a pulse signal and a rotation speed of the motor are set. Second rotation speed detecting means for detecting with a pulse signal,
Setting means for keeping the rotation speeds of the guide roller and the holding mechanism at a constant rotation speed ratio, and the motor control means detects the detection signals of the first rotation speed detection means and the second rotation speed detection means. An axis drive device, wherein the rotation speed of the holding mechanism is controlled based on a setting signal from the setting means.