JP2004115170A - Wire rewinding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire rewinding device capable of detecting coming-off of wire from a wire tension pulley and the rotation failure of the pulley without affecting the tension detection of the wire. <P>SOLUTION: The device is equipped with a swing arm 1 disposed between a winding-off part and a take-up part, a tension pulley 4 which is rotatably supported with the arm, guides the wire W fed from the winding-off part to the take-up part and gives the tension to the wire, a tension detection means 11 which detects the tension of the wire and feed-backs to the winding-off part, and a sensor 6 which is attached to the arm and detects the rotation of the tension pulley 4. The output lead wire 8 of the sensor 6 is inserted in the inside of the swing arm 1, pulled out near the rotary center part of the arm, and connected to a fine lead wire 9 having small elasticity including a loosened part 9a pulled out near the rotary center part from the outside part through the inside of the rotary shaft 3 of the arm 1. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rewinding device that can be suitably used to rewind a fine wire such as a fine wire wound on a base material at a constant speed.
[0002]
[Prior art]
A device for rewinding a fine wire such as a fine wire includes an unwinding unit that unwinds a wire, a winding unit that winds the wire to a predetermined length, and a swing unit that is installed between the unwinding unit and the winding unit. A moving arm, a pulley that is rotatably supported by the swinging arm, guides a wire running from the unwinding section to the winding section, and applies tension to the wire; and Tension detecting means for detecting and feeding back to the unwinding portion, and a sensor attached to the swing arm and detecting rotation of the pulley are provided.
[0003]
[Problems to be solved by the invention]
Normally, the wire unwound from the unwinding section travels via guide pulleys and pulley pulleys arranged along the travel line, but the wire is lost due to an error in the operator's setting operation or the collapse of the running wire. May be disengaged from the pulley and run while contacting the side surface of the pulley and the parts there, or the wire may be damaged or twisted due to poor rotation due to wear of the bearing of the pulley. there were.
[0004]
Conventionally, as a countermeasure for this, a metal thin film attached to a side recess of a pulley and a sensor installed to face the metal thin film and detecting passage of the metal thin film are provided, and a count detected by the sensor is provided. As shown in FIGS. 4 and 5, a change in the tension of the wire W is used to control the change in the tension of the wire W. Since the tension of the ultrafine wire is as small as 1 to 2 g in the tension detecting device detected in (1), the rigidity of the lead wire 8 connecting the sensor 6 and the control unit affects the rotational displacement of the swing arm 1 and the result. As a result, there is a problem that accurate tension detection is hindered, and it is impossible to use this part.
[0005]
The present invention has been made in view of the above-mentioned problems of the conventional device, and aims to remove a wire from a pulley pulley or a rotation failure of the pulley, affecting the detection of tension. An object of the present invention is to provide a wire rewinding device that can be detected without any problem.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a wire rewinding device according to the present invention includes a winding unit, a winding unit, a swing arm installed between the winding unit and the winding unit, and a swing arm. A pulley that is rotatably mounted on the wire and applies tension to a wire that is sent from the unwinding unit to the winding unit; and a pulling unit that is connected to the swing arm and detects the tension to detect the tension. Tension detecting means for feeding back to the arm, and a sensor attached to the arm for detecting rotation of the pulley, wherein the sensor is inserted inside the swing arm and pulled out near the center of rotation of the arm. The output lead wire of the sensor is connected to a thin lead wire having a small elasticity including a slack portion pulled out from the outside through the rotation axis of the swing arm and near the rotation center portion. That.
[0007]
According to the present invention, the swing arm is provided with a balancer for balancing the total weight of the pulley pulley, the sensor and the output lead wire.
[0008]
According to the present invention, the sensor includes a proximity sensor attached to the swing arm and a metal thin film attached to the pulley pulley and capable of facing the proximity sensor.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the illustrated embodiments. FIG. 1 is a schematic configuration diagram of a wire rewinding device according to the present invention, and FIG. 2 is a right side view of FIG. In the drawing, reference numeral 1 denotes a hollow swing arm fixed to a rotation shaft 3 rotatably supported by a pair of bearings 2 attached to an apparatus main body (not shown), and 4 rotates to one end of the swing arm 1. A wire pulling pulley which is supported so as to have a metal thin film piece 5 attached to the side surface, 6 is a proximity sensor mounted on one end of the swing arm 1 so as to face the metal thin film piece 5 of the wire pulley 4, and 7 is a swing sensor. A balancer 8 attached to the other end of the moving arm 1 is an output lead wire of the proximity sensor 6 that is inserted into the inside of the swinging arm 1 and drawn out near the center of rotation of the swinging arm 1.
[0010]
Further, the elastic member 9 is connected to the output lead wire 8 through the rotating shaft 3 of the oscillating arm 1 and drawn out to the vicinity of the oscillating center of the oscillating arm and through an arc-shaped slack portion 9a having a small curvature. And a thin external lead wire 10, an adjusting screw which is screwed to the main body of the apparatus so as to be able to advance and retreat and has a strain gauge 11 attached thereto, and 12 is between an arm 13 attached to the rotating shaft 3 and the strain gauge 11. A pull-out spring 14 is rotatably attached to the apparatus main body and guides the wire W fed out from an unillustrated unwinding portion. A tension spring 14 is rotatably mounted on the apparatus main body. And a winding-side pulley that guides the wire W traveling through the pulley 4 to a winding unit (not shown).
[0011]
The balancer 7 is used to balance left and right rotational moments about the pivot shaft 3 of the swing arm 1, that is, the total weight of the pulley 4, the proximity sensor 6, and the output lead wire 8. The weight is selected so that it can be balanced. The tension spring 12 serves to apply a predetermined tension to the wire W via the swing arm 1 and the tension pulley 4, and the tension is set to a reference value by turning the adjusting screw 10. The strain gauge 11 constitutes tension detecting means for detecting a change in the tension of the wire W.
[0012]
Next, the operation of the above device will be described. Initially (before the wire W is hooked on the pulley), the swing arm 1 is in a position counterclockwise rotated in FIG. 2 by the force of the tension spring 12, but the wire W is hooked on the pulleys 14, 4 and 15. When the winding unit (not shown) starts operation, the pulley 4 is pulled to the left in FIG. 2 and the swing arm 1 is rotated clockwise to apply a predetermined tension set on the wire W. . The change in the tension of the wire W during operation is detected by the strain gauge 11 via the rotational displacement of the swing arm 1, and the output of the strain gauge 11 is fed back to the unwinding unit (not shown), and The payout speed of W is controlled, and the tension of the wire to be wound is kept substantially constant.
[0013]
In this case, the output lead wire 8 of the proximity sensor 6 substantially moves integrally with the swing arm 1 and passes through the slack portion 9a which is inserted into the rotating shaft 3 and has an arc shape with a small radius of curvature. Since they are drawn out to the outside through the lead wire 9 which includes the swing arm 1, they do not become a resistance to the rotational displacement of the swing arm 1, and the swing arm 1 is balanced by the balancer 7 in the right and left rotational moments. Since it is kept, the change in the tension of the wire W can be transmitted to the strain gauge 11 with high sensitivity.
[0014]
The lead wire 9 inserted from the outside into the rotating shaft 3 and pulled out is provided with an arc-shaped slack portion 9a, which is arranged near the center of rotation of the swing arm 1 and has a weak elasticity and a small curvature. The bending and torsional force of the slack portion 9a generated when the swing arm 1 rotates and the torque based on the bending and torsion force are extremely small since the swing arm 1 is connected to the lead wire 8 via the wire. There is no. Therefore, even if the proximity sensor 6 for detecting the abnormal rotation of the pulley 4 is installed at the tip of the swing arm 1, the rotation of the pulley 4 can be detected without causing a malfunction in the detection of the wire tension. It is possible to provide a wire rewinding device that can be accurately performed.
[0015]
【The invention's effect】
As is clear from the above description, according to the present invention, even during winding of a fine wire, the traveling fine wire can be detached from the tension pulley without affecting the detection of the tension of the fine wire, It is possible to provide a wire rewinding device capable of accurately knowing a pulley rotation failure or the like and preventing the occurrence of defective products at an early stage.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a wire rewinding device according to the present invention.
FIG. 2 is a right side view of FIG.
FIG. 3 is an enlarged view of a portion surrounded by a chain line in FIG.
FIG. 4 is a schematic configuration diagram of a conventional wire rewinding device.
FIG. 5 is a right side view of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Swing arm 2 Bearing 3 Rotating shaft 4 Tension pulley 5 Metal thin film 6 Proximity sensor 7 Balancer 8 Output lead wire 9 Lead wire 9a Loose part 10 Adjustment screw 11 Strain sensor 12 Tension spring 13 Arms 14, 15 Pulley

Claims (3)

An unwinding unit, a winding unit, a swing arm installed between the unwinding unit and the winding unit, and a rotatable unit attached to the swing arm and rotatable from the unwinding unit. A tension pulley for applying tension to the wire sent out to the swing arm, tension detecting means connected to the swing arm to detect the tension and feed back to the unwinding portion, and attached to the arm, A sensor for detecting the rotation of the pulley, wherein the output lead wire of the sensor, which is inserted into the inside of the swing arm and drawn out near the center of rotation of the arm, is externally rotated by the rotation of the swing arm. A wire rewinding device which is connected to a thin lead wire having a small elasticity including a slack portion drawn through the shaft and near the rotation center. The wire rewinding device according to claim 1, wherein a balancer for balancing the total weight of the pulley, the sensor, and the output lead wire is attached to the swing arm. 3. The wire rewinding device according to claim 1, wherein the sensor includes a proximity sensor attached to the swing arm, and a metal thin film attached to the pulley and facing the proximity sensor. 4.

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