JPH0891700A - Wire guiding device - Google Patents

Abstract

PURPOSE: To provide a wire guiding device capable of controlling a mount to be stopped at the same position on the forward path and the return path. CONSTITUTION: This wire guiding device is provided with a rotary shaft 1 having a male screw with the prescribed pitch (p) and rotated by a motor 9, a mount 2 having a transit detecting projection 10 with the length L and screwed with the rotary shaft 1 to be moved in the shaft direction, a sensor detecting the revolving speed (n) of the rotary shaft 1, a detecting switch 5 detecting the transit of the upper and lower edges of the transit detecting projection 10, a shift distance calculation section 7 calculating the mount shift distance D based on the shaft revolving speed (n) and pitch (p), and a stop controller 8 starting the distance calculation by the shift distance calculation section 7 when the transit of a mount is detected and stopping the motor 9 when the mount shift distance becomes L/2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rod guide device for controlling a mount for moving a winding position of the wire rod in the axial direction of the drum so as to stop the mount at a predetermined position when the wire rod is wound around a drum or the like. The present invention relates to a wire rod guide device that can stop a mount at the same position on the outward path and the return path.

[0002]

2. Description of the Related Art Conventionally, when a wire rod such as an electric wire is wound on a drum or the like, a traverse having a mount for moving the winding position of the wire rod on the drum in the axial direction of the drum in order to uniformly wind the wire rod on the drum The device is in use. In some cases, this mount may need to be stopped at any position along the drum axis. As a mechanism for satisfying such a demand, a wire rod guide device as shown in FIG. 2 (A) is known. The wire rod guide device 200 includes a frame 13 and a motor 9 attached to the frame.
A rotary shaft 1 which is provided with a male screw on the outer periphery and is driven to rotate by a motor 9; and a pulley 11 which guides the wire W.
A mount 2 which has a convex portion 10 for passage detection and is screwed into the rotary shaft 1 so as to be movable in the longitudinal direction of the rotary shaft (hereinafter referred to as “shaft direction”) by rotation of the rotary shaft 1; A passage detection switch 5 for detecting passage of parts, and a controller 12 for stopping rotation of the motor 9 based on a passage detection signal from the passage detection switch 5.
It is configured with.

In the above wire rod guide apparatus 200, the following method is known as a method for controlling the mount 2 to stop at the same position regardless of whether it is the forward path or the backward path. There is. The first method is shown in FIG.
As shown in FIGS. 2B and 2C, this is a method in which only one passage detection switch 5 is provided and the mount stop control is performed. Here, FIG. 2B shows the case where the mount 2 is the outward path,
FIG. 2C shows the case where the mount 2 is the return path. In the first method, when the mount 2 is an outward path as shown in FIG. 2B, the passage detection switch 5 detects passage of one edge of the passage detection convex portion 10 of the mount 2 and outputs a passage detection signal. When output to the control device 12, the control device 12 immediately outputs a drive stop control signal to the motor 9 and outputs the drive stop control signal to the motor 9.
And the mount 2 is stopped. In addition, as shown in FIG. 2C, when the mount 2 is the return path, the passage detection switch 5 detects passage of the other edge of the passage detection convex portion 10 of the mount 2 and outputs a passage detection signal to the control device 12. Then, the controller 12 immediately outputs a drive stop control signal to the motor 9 to stop the rotation of the motor 9 and stop the mount 2. Therefore, the mount 2 stops when one edge of the passage detection convex portion 10 reaches the center position of the passage detection switch 5 on the outward path, and the other edge of the passage detection convex portion 10 on the center position of the passage detection switch 5 on the return path. It will stop when it reaches the position.

Next, as a second method, as in the first method, only one passage detecting switch 5 is provided, and the value of the length L of the passage detecting convex portion 10 in the shaft direction and the motor 9 are provided.
In this method, the number of rotations per unit time and the value of the pitch of the screw provided on the rotary shaft are input to the control device 12 in advance and the mount stop control is performed. Here, FIG. 2B shows the case where the mount 2 is the forward path, and FIG. 2C shows the case where the mount 2 is the backward path. In the second method, when the mount 2 is an outward path as shown in FIG. 2B, the passage detection switch 5 detects passage of one edge of the passage detection convex portion 10 of the mount 2 and outputs a passage detection signal. When output to the control device 12, the control device 12 calculates the moving speed of the mount 2 in the shaft direction from the number of revolutions of the motor 9 per unit time and the rotation shaft screw pitch, and the time for which the mount 2 advances by the length L / 2. Then, the stop control time is calculated. Then, after the stop control time has elapsed, a drive stop control signal is output to the motor 9 to stop the rotation of the motor,
Stop mount 2. In addition, as shown in FIG. 2C, when the mount 2 is the return path, the passage detection switch 5 detects passage of the other edge of the passage detection convex portion 10 of the mount 2 and outputs a passage detection signal to the control device 12. Then, the control device 12
Calculates the moving speed of the mount 2 in the shaft direction from the number of revolutions of the motor 9 per unit time and the rotary shaft screw pitch, and calculates the stop control time which is the time for the mount 2 to advance by the length L / 2. Then, after the stop control time has elapsed, a drive stop control signal is output to the motor 9 to stop the rotation of the motor and stop the mount 2. Therefore, the mount 2 stops at the center of the passage detecting convex portion 10.

Next, as a third method, as shown in FIG. 2 (D), unlike the first and second methods, the mount forward pass detection switch 5a and the mount return pass detection are performed. This is a method in which two sensors including the switch 5b are provided to control the stop of the mount. In the third method, when the mount 2 is an outward path, the passage detection switch 5a detects passage of one edge of the passage detection convex portion 10 of the mount 2 and outputs a passage detection signal to the control device 12, Reference numeral 12 immediately outputs a drive stop control signal to the motor 9 to stop the rotation of the motor and stop the mount 2. Further, when the mount 2 is the return path, when the passage detection switch 5b detects passage of the other edge of the passage detection convex portion 10 of the mount 2 and outputs a passage detection signal to the control device 12, the control device 12 immediately outputs the motor. A drive stop control signal is output to 9 to stop the rotation of the motor and stop the mount 2. Therefore,
The mount 2 will be stopped at the same position regardless of the forward and backward paths of the mount 2.

[0006]

However, in the first method of the above-mentioned conventional traverse position control methods, in the outward path of the mount 2, the mount 2 of the mount 2 has one edge of the pass detection convex portion 10 in the pass detection switch 5. When the other edge of the passage detection convex portion 10 comes to the center position of the passage detection switch 5, the mount 2 stops on the return path of the mount 2. Therefore, the length L of the passage detection convex portion 10 in the shaft direction is always on the forward and backward paths of the mount 2.
There was a problem that the stop position of the mount 2 was displaced by that amount.

Further, the second method of the above-mentioned conventional mount stop control methods is premised on that the rotation speed of the motor 9 is constant, so that the rotation speed of the motor 9 changes for some reason. Then, the time for which the mount 2 advances by the length L / 2 also changes. Therefore, the motor 9
There is a problem that the position at which the mount 2 stops changes when the rotation speed of the mount changes. In these first and second methods, it is difficult to stop at the same position on the forward and return paths of the mount, so the wire arm guided by the mount by the winding bobbin automatic switching system or the like is gripped by the robot arm or the like. When trying to do so, the mount does not always stop at a fixed position, and there is a possibility that a grip error of the robot arm may occur.

The third method can more reliably stop the mount 2 at the same position than the first and second methods, but requires two passage detection switches and has a large number of parts. However, there is a problem in that it is disadvantageous in terms of manufacturing cost. Therefore, an object of the present invention is to provide a wire rod guide device that can control the mount to stop at the same position on the forward and backward paths while suppressing cost increase without increasing the number of parts.

[0009]

In order to solve the above-mentioned problems, the wire rod guide apparatus according to the present invention traverses a mount having a pulley for guiding the wire rod on a rotary shaft having a predetermined traverse pitch. In a wire rod guide device for guiding the wire rod in a predetermined direction, a position detecting means for outputting a position signal when the mount reaches a predetermined traverse position, and a rotation amount signal for detecting a rotation amount of the rotary shaft. Rotation amount detection means, control means for stopping the rotation of the rotation shaft when the movement amount corresponding to the rotation amount and the traverse pitch of the rotation shaft reaches a reference movement amount after the position signal is output,
It is configured with.

[0010]

According to the present invention having the above construction, the rotation amount detecting means detects the rotation amount of the rotary shaft and outputs the rotation amount signal. The passage detecting means outputs a position signal when the mount reaches a predetermined traverse position, and when the position signal is input to the control means, the control means determines the rotation amount and the traverse pitch of the rotary shaft. Calculate the amount of movement of the mount according to. Then, when the movement amount reaches the reference movement amount, the control means stops the rotation of the rotating shaft.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. As shown in FIG. 1A, a wire rod guide device 100 according to an embodiment of the present invention includes a frame 13, a rotary shaft 1 attached to the frame 13, a mount 2, a motor 9, and a rotation amount detection. It comprises a disk 3 with slits and a rotation speed detection sensor (photocoupler) 4, a passage detection switch 5 as detection switch means, and a control device 6 as control means.

The rotary shaft 1 is formed in an elongated cylindrical shape, and the male screw 1 is formed on the outer peripheral surface thereof at a predetermined traverse pitch.
4 are provided. In addition, the rotary shaft 1 is a motor 9
When the motor 9 rotates, the rotary shaft 1 also rotates.

The mount 2 is provided with a passage detecting convex portion 10 on the outside thereof. The length of the passage detection protrusion 10 in the longitudinal direction of the rotary shaft 1 (hereinafter referred to as “shaft direction”) is L, and the position is L / 2 from any edge of the passage detection protrusion 10. Is shown as the center line C of the mount 2. Further, it has a cylindrical opening 15, and female screws (not shown) are provided on the inner wall of the opening 15 at a predetermined pitch. The female screw is screwed onto the male screw 14 of the rotary shaft 1. With this structure, when the rotary shaft 1 rotates, the mount 2
Moves back and forth in the shaft direction. Also, mount 2
A pulley 11 that traverses the wire W and guides the wire W in a predetermined direction is provided in the.

The disk 3 is fixed to one end of the rotary shaft 1 and has a plurality of slits (not shown) at its outer edge. The rotation speed detection sensor 4 is provided with an LED (light emitting diode) (not shown), a photodetector (photodiode) as a photodetection unit, and a fixed slit so as to sandwich the slit of the disk 3. With such a configuration, if the light is emitted from the LED and detected by the photodetector through the slit of the disc and the fixed slit, the rotation speed of the disc 3 can be detected. The rotation speed detection sensor 4 outputs a shaft rotation speed signal containing the value of the rotation speed n. In the above, the disk 3 and the rotation speed detection sensor 4 constitute a rotation amount detection means. The shaft rotation speed signal corresponds to the rotation amount signal.

The passage detection switch 5 is mounted on the mount 2
Is fixed on a stop line S (see FIG. 1 (B) or FIG. 1 (C)) to be stopped. This passage detection switch 5
Outputs a position signal when the mount 2 reaches a predetermined traverse position, that is, when one of the edges of the passage detecting protrusion 10 in the shaft direction passes through the passage detecting switch 5. That is, in the passage detection switch 5, when the mount 2 is the outward path, one edge of the passage detection convex portion 10 is located at the center line (stop line S) of the passage detection switch 5 as shown in FIG. 1B. A position signal is output when passing. Although not shown in the case of the return path, the passage detection switch 5 outputs a position signal when the other edge of the passage detection convex portion 10 passes through the center line (stop line S) of the passage detection switch 5.

The moving distance calculation unit 7 and the stop control unit 8 in the control device 6 are, specifically, CPUs (Central Processing Units).
nit: central processing unit), ROM (Read Only Memory: read only memory), RAM (Random Access Memory: random write / read memory), and the like.

When the calculation start signal is input from the stop control unit 8, the moving distance calculation unit 7 in the control device 6 receives the shaft rotation speed signal output from the rotation speed detection sensor 4, and
From the predetermined pitch, the mount movement distance, which is the distance the mount 2 has moved in the shaft direction of the mount 2 with reference to a certain time, is calculated and output to the stop control unit 8 as a movement distance signal.

A method of calculating the mount movement distance D will be described below. The mount movement distance D is calculated by D = np from the rotation speed n of the disk 3 detected by the rotation speed detection sensor 4 and input to the movement distance calculation unit 7 and the screw pitch p. The value of the mount moving distance D is not affected by the change in the rotation speed of the disk 3, that is, the rotation speed of the motor 9.

Next, the control operation of the stop controller 8 in the controller 6 will be described. When the position signal is input from the passage detection switch 5 described above, the stop control unit 8 outputs a calculation start signal that causes the movement distance calculation unit 7 to start calculation of the mount movement distance. When the calculation start signal is input, the movement distance calculation unit 7 starts the calculation of the mount movement distance from that time, and outputs the mounting movement distance from moment to moment to the stop control unit 8 as a movement distance signal. Stop control unit 8
Monitors this movement distance signal, and when the value of the mount movement distance D reaches L / 2, outputs a stop signal to the motor 9 to stop it. With this control, as shown in FIG. 1C, the center line C of the mount 2 is always detected regardless of whether the mount 2 is moving forward or backward, or even when the rotation speed of the motor 9 changes. The center line of the switch 5 (stop line S) can be matched to stop the switch accurately.
In the above, L / 2 corresponds to the reference movement amount.

The present invention is not limited to the above embodiment. The above-mentioned embodiment is an exemplification, has substantially the same configuration as the technical idea described in the scope of the claims of the present invention, and has any similar effect to the present invention. It is included in the technical scope of the invention.

For example, in the above-described embodiment, an example in which a disk having a slit and a rotation speed detection sensor are used as the rotation amount detection means has been described, but the present invention is not limited to this, and other detection means, for example, A magnetic rotary encoder, tacho generator or the like may be used.

[0022]

As described above, according to the present invention having the above-mentioned structure, the rotation amount detecting means detects the rotation amount of the rotary shaft and outputs the rotation amount signal. The passage detecting means outputs a position signal when the mount reaches a predetermined traverse position, and when the position signal is input to the control means, the control means determines the rotation amount and the traverse pitch of the rotary shaft. Calculate the amount of movement of the mount according to. Then, when the movement amount reaches the reference movement amount,
The control means stops the rotation of the rotating shaft.

Therefore, instead of adopting the preset numerical value of the rotational speed of the rotary drive source of the rotary shaft per unit time, the actually measured rotational amount such as the rotational speed of the rotary drive source is used. Since it is calculated to, the mount can be controlled to accurately stop at the same stop position regardless of the forward and backward paths of the mount and even if the rotation speed of the rotary drive source changes in the middle.
There is an advantage. Also, by changing the value of the mount movement distance that is the reference for performing the stop control, it is possible to control the mount to stop at another fixed position.
It has the advantage of Further, there is also an advantage that the number of passage detection switches is one and the cost is low. Further, since the rotation amount of the rotary shaft is larger than the linear movement amount of the mount that moves in the shaft direction, the mount stop control of the present invention, which monitors the shaft rotation amount, performs the linear movement of the mount. It also has an advantage that the accuracy is further improved as compared with the stop control performed by monitoring the amount.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration and an operation of an embodiment of a wire guide device according to the present invention.

FIG. 2 is a diagram showing a configuration and operation of a conventional wire rod guide device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotary shaft 2 mount 3 disc 4 rotation speed detection sensor 5, 5a, 5b passage detection switch 6 control device 7 moving distance calculation unit 8 stop control unit 9 motor 10 passage detection convex portion 11 pulley 12 control device 13 frame 14 male screw 15 openings 100,200 wire rod guide C mount center line S stop line W wire rod

Claims (3)

[Claims] 1. A wire rod guide device for guiding a wire rod in a predetermined direction by traversing a mount having a pulley for guiding the wire rod on a rotating shaft having a predetermined traverse pitch, wherein the mount has a predetermined traverse position. Position detecting means for outputting a position signal when it comes to, rotation amount detecting means for detecting a rotation amount of the rotating shaft and outputting a rotation amount signal, and the rotating amount and the rotating shaft after the position signal is output. And a control means for stopping the rotation of the rotary shaft when the movement amount according to the traverse pitch reaches a reference movement amount. 2. The position detecting means comprises a position detecting convex portion provided on the mount, and a detection switch means for detecting passage of the position detecting convex portion. The described wire rod guide device. 3. The rotation amount detecting means includes a disk that rotates in accordance with the rotation of the rotary shaft, and a light detecting means that optically detects the number of rotations of the disk. 1. The wire rod guide device described in 1.