JPH08140317A - Apparatus and method for adjusting back tension of winding machine - Google Patents

Abstract

PURPOSE: To perform winding operation stably while following a charge in the tension of a coil by a method wherein the back tension is adjusted interlockingly with a braking action by a back tension pulley according to a change in the rotational speed of a tension pulley. CONSTITUTION: The deceleration of a tension pulley 8 is detected by a speed detector 82, a linear motor 94 is driven, a push pulley 93 is pushed to a back tension pulley 91, and a coil W is sandwiched between the push pulley 93 and the back tension pulley 91. A back tension motor 92 detects, by means of a linear encoder 95, that the push pulley 93 has been brought close to the back tension pulley 91, and it drives the back tension pulley 91 in the direction opposite to the feed operation of the coil W. As a result, the feed of the coil W is glowed, the back tension is adjusted, and the slack is eliminated. Thereby, winding operation can be performed stably while following a change in the tension of the coil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back tension adjusting device and method for a winding machine that winds a coil while applying tension to the coil while feeding it from a coil bobbin to a flyer.

[0002]

2. Description of the Related Art Conventionally, a back tension device for a winding machine is constructed, for example, as shown in FIG. 1 is a flyer for winding a coil W around an iron core T of a motor, 11 is a hollow shaft of the flyer 1 for rotating and moving through the coil W, 1
Reference numeral 2 is a motor for rotating the hollow shaft 11, and 2 is a support frame that supports the hollow shaft 11. Reference numeral 21 is a mounting plate provided on the support frame 2, and 31 and 32 are first and second pulleys for supporting the coil W, which are rotatably provided on the mounting plate 21. Reference numeral 4 denotes a dancer arm whose one end is pin-connected to the post 22 provided on the support frame 3 so as to be able to freely rotate, 41 is a tension pulley provided to the other end of the dancer arm 4 so as to be freely rotatable, Reference numeral 42 is a dancer spring, which always acts to pull down the dancer arm 4. Reference numeral 5 denotes a coil friction device, which adjusts the pressure of the coil receiving portion 51, the coil pressing portion 52 facing the coil receiving portion 51, the pressing spring 53 that applies pressure to the coil pressing portion 52, and the pressing spring 53. And a spring pressure adjusting portion 54, which applies a friction to the coil W passed between the coil receiving portion 51 and the coil pressing portion 52 to brake the movement of the coil W. 6 is a clip cleaner and 7 is a coil bobbin.
When attaching the coil W to the flyer 1, dust and dirt are removed from the coil bobbin 7 through the clip cleaner 6, passed between the coil receiving portion 51 and the coil pressing portion 52, and wound around the first pulley 31. It is wound around the tension pulley 41 and further wound around the second pulley 32 and passed through the inside of the hollow shaft 11 of the flyer 1. When the shape around which the coil W is wound is rectangular, when the flyer 1 is rotated, the feed amount of the coil W changes and the tension of the coil W also changes, but the dancer arm 4 and the tension pulley 4
The fluctuation of the tension is absorbed by the dancer spring 42 via 1.

[0003]

However, in the prior art, as the winding speed of the coil is increased, the tension changes drastically, the dancer arm moves violently, and sometimes the resonance state of the dancer spring is generated to cause shock to the coil. However, there are drawbacks in that the coil is disconnected due to various tensions, the coil is greatly loosened and the coil is disengaged from the pulley, and the automatic winding work becomes impossible, and a lot of time is required for the maintenance work.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a back tension device for a winding machine, which is capable of performing stable winding work by sufficiently following changes in coil tension.

[0004]

In order to solve the above problems, the present invention provides a flyer for winding a coil, a coil bobbin for supplying a coil to the flyer, and a tension pulley provided between the coil bobbin and the flyer. And a back tension adjusting device for a winding machine including a guide pulley, a speed detector for detecting a rotation speed of the tension pulley, a back tension pulley provided between the guide pulley and the tension pulley, A back tension motor that drives a back tension pulley, a linear motor that presses a pressing pulley against the back tension pulley, and a linear encoder that detects the position of the pressing pulley are provided. Also,
A back tension adjusting method for a winding machine, comprising: a flyer that winds a coil; a coil bobbin that supplies the coil to the flyer; and a tension pulley and a guide pulley that are provided between the coil bobbin and the flyer. A speed detector for detecting the rotation speed of the back tension pulley, a back tension pulley provided between the guide pulley and the tension pulley, a back tension motor for driving the back tension pulley, and a pressing pulley for pressing the back tension pulley. The linear motor includes a linear motor and a linear encoder that detects the position of the pressing pulley, and the speed detector detects that the tension pulley has decelerated to drive the linear motor. Pulley While pressing, the back tension motor detects that the pressing pulley approaches the back tension pulley by the linear encoder and drives the back tension motor to move the back tension pulley in the direction opposite to the feeding of the coil. It rotates.

[0005]

With the above means, the speed detector detects that the tension pulley has been decelerated to drive the linear motor, and the pushing pulley pushes the coil W against the back tension pulley, and the coil is placed between the pushing pulley and the back tension pulley. Sandwich. The back tension motor detects that the pressing pulley approaches the back tension pulley by the linear encoder and drives the back tension motor to rotate the back tension pulley in the direction opposite to the feeding of the coil W. Since the coil W is pressed against the back tension pulley by the pressing pulley in this state, the feeding of the coil W is braked, the tension from the tension pulley to the coil bobbin is increased, and the slack of the coil is eliminated.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing an embodiment of the present invention. In the figure, 1 is a flyer, 11 is a hollow shaft, 2 is a support frame,
Reference numeral 21 is a mounting plate provided on the support frame 2, 3 is a guide pulley supported by the mounting plate 21 so as to be freely rotatable, 6 is a clip cleaner, and 7 is a coil bobbin. Reference numeral 8 denotes a tension pulley provided near the entrance of the hollow shaft 11, which is driven by a tension motor 81 which rotates with a constant torque so that the coil W between the tension pulley 8 and the flyer 1 is always in the opposite direction to the flyer 1. A certain torque is applied in the rewinding direction. A speed detector 82 detects the rotation speed of the tension pulley 81.
9 is a back tension device, 91 is a back tension pulley, 92 is a back tension motor that drives the back tension pulley 91 with a constant torque, and 93 is a coil W.
Is pressed against the back tension pulley 91, 94 is a pressing pulley 93
Reference numeral 1 denotes a linear motor which is pressed against 1, and 95 is a linear encoder which detects the position of the pressing pulley 93. The coil W is pulled out from the coil bobbin 7, passes through the clip cleaner 6, is wound around the first pulley 31, passes between the back tension pulley 91 and the pressing pulley 93, and is wound around the tension pulley 8. It is fixed to the flyer 1 by passing through the hollow shaft 11.

When the flyer 1 rotates, the coil W is wound around the iron core T under the tension generated by the torque of the tension motor 81. At this time, the feed speed of the coil W varies depending on the shape of the iron core T, but since the tension pulley 8 constantly applies a torque in a rewinding direction by the tension motor 81 having a constant torque, the coil W
The coil W between the tension pulley 8 and the flyer 1 is not loosened even if the feeding speed of the coil is reduced. However, the tension pulley 8 rotates while the speed changes according to the feed speed. Therefore, the coil W between the tension pulley 8 and the coil bobbin 7 does not loosen when the feed speed increases, but tends to loosen when the feed speed decreases. At this time, the speed detector 82 detects that the tension pulley 8 has decelerated, and the linear motor 9
The coil W is pressed against the back tension pulley 91 by driving the pressing pulley 93, and the coil W is sandwiched between the pressing pulley 93 and the back tension pulley 91. The back tension motor 92 detects that the pressing pulley 93 approaches the back tension pulley 91 by the linear encoder 95 and drives the back tension motor 92 to rotate the back tension pulley 91 in the direction opposite to the feeding of the coil W. In this state, the coil W is pressed against the back tension pulley by the pressing pulley 93 to brake the feed of the coil W and adjust the back tension, so that the slack is eliminated. As the feeding speed of the coil W between the tension pulley 8 and the flyer 1 increases, the rotational speed of the tension pulley 8 increases, so the speed detector 82 detects that the speed has increased. The pressing pulley 93 is moved backward by the linear motor 92 and separated from the back tension pulley 91. This makes the coil W
The applied brake is released, and the feeding speed of the coil from the tension pulley 8 to the coil bobbin 7 is increased. In this way, the slack generated from the tension pulley to the coil bobbin due to the rotation of the flyer detects that the speed of the tension pulley has decreased, drives the linear motor, and causes the coil to move between the pressing pulley and the back tension pulley. The slack can be eliminated by putting a brake on the coil feed across the pinch and adjusting the back tension.
Therefore, unlike the conventional case, the dancer arm moves violently, and impulsive tension acts on the coil to prevent the coil from breaking or coming off the pulley.

[0008]

As described above, according to the present invention, the back tension is adjusted by interlocking the brake operation by the back tension pulley in accordance with the change in the rotation speed of the tension pulley, so that the coil is There is an effect that stable coiling work with a high operating rate can be performed by sufficiently following fluctuations in the tension of the coil without the coil breaking or disconnecting from the pulley due to the impacting tension.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a conventional example.

[Explanation of symbols]

1 flyer, 11 hollow shaft, 2 support frame, 21 mounting plate, 3 guide pulley, 6 clip cleaner, 7 coil bobbin, 8 tension pulley, 81 tension motor, 82 speed detector, 9 back tension device, 91 back tension pulley, 92 Back tension motor, 93 push pulley, 94 linear motor,
95 linear encoder

Claims (2)

[Claims] 1. A back tension adjusting device for a winding machine, comprising a flyer for winding a coil, a coil bobbin for supplying the coil to the flyer, and a tension pulley and a guide pulley provided between the coil bobbin and the flyer. A speed detector for detecting the rotation speed of the tension pulley, a back tension pulley provided between the guide pulley and the tension pulley, a back tension motor for driving the back tension pulley, and the back tension pulley. A back tension adjusting device for a winding machine, comprising: a linear motor that presses a pressing pulley on the shaft; and a linear encoder that detects a position of the pressing pulley. 2. A back tension adjusting method for a winding machine, comprising: a flyer for winding a coil, a coil bobbin for supplying the coil to the flyer, and a tension pulley and a guide pulley provided between the coil bobbin and the flyer. A speed detector for detecting the rotation speed of the tension pulley, a back tension pulley provided between the guide pulley and the tension pulley, a back tension motor for driving the back tension pulley, and the back tension pulley. A linear motor for pressing the pressing pulley and a linear encoder for detecting the position of the pressing pulley. The speed detector drives the linear motor by detecting that the tension pulley is decelerated, and the pressing pulley is used. Coil the back ten The back tension motor detects that the pressing pulley approaches the back tension pulley by the linear encoder while driving the back tension motor, and drives the back tension motor to feed the back tension pulley to the coil. A method for adjusting back tension of a winding machine, characterized by rotating in opposite directions.