JP7186485B2 - Feeding device for tensioning wire - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension-applying wire supply device that supplies a tension-applied wire to a winding device or the like.

Conventionally, in a tension-applying wire supply device that supplies a wire to a winding device or the like in a state where tension is applied, as shown in FIG. and a pay-out pulley 7 around which the wire 1 unwound from the wire storage spool 4 is wound and rotated to pay out the wire 1 (see, for example, Patent Document 1).

In this tension-applying wire rod feeding device, a tension bar 3 provided with a wire rod guide 6 through which the wire rod 1 let out from the feeding pulley 7 passes; An elastic member 2 that exerts an elastic force corresponding to the rotation angle of the tension bar 3 is further provided at a predetermined position between the tension bars 3, and the wire rod 1 passing through the wire rod guide 6 at the tip of the tension bar 3 where the elastic force is exerted is attached to the wire rod 1. The tension is generated based on the elastic force. The tension-applying wire rod feeding device is configured to control the rotational speed of the pay-out pulley 7 so that the tension applied to the wire rod 1 becomes a predetermined value.

In this conventional tension-applying wire rod supply device, a wire storage spool 4 as a supply source of the wire rod 1 is erected, and the wire rod 1 unwound and pulled out from the upper end of the spool is hung around a feeding pulley 7, and then a wire rod guide 6. and guide it to the supply destination. Then, tension is applied to the wire rod 1 passing through the wire rod guide 6 by the elastic member 2 serving as tension applying means, and the tension of a predetermined value is obtained by controlling the rotation speed of the delivery pulley 7 so that the tension is constant. can be supplied.

JP-A-2000-128433

However, in the above-described conventional tension-applying wire rod supply device, the wire rod 1 is pulled upward from the upper end of the storage spool 4, which is the supply source of the wire rod 1, and unwound. will be pulled out to Then, if a large amount of the wire rod 1 remains on the wire spool 4, the wire rod 1 pulled out on the loop is excessively twisted and a kink occurs, or if the remaining amount of the wire rod 1 decreases, the wire rod spool The wire rod 1 is caught on the edge of the wire rod 4, causing trouble in the feeding of the wire rod 1 by the feeding pulley 7, and causing a problem that the tension value varies in a situation where the tension value must be controlled more precisely. . In addition, the occurrence of twisting in the wire rod 1 also causes variations in the tension value.

In order to solve such a problem, instead of the pay-out pulley 7, the wire storage spool 4 itself may be rotated, and the wire rod 1 may be pulled out from the rotating wire storage spool 4 in its circumferential direction and supplied directly to the supply destination. Conceivable.

However, for example, when the wire rod 1 is supplied to a winding machine 8 and the wire rod 1 is wound around a winding core 8a having a rectangular cross section, if the winding core 8a is rotated at the same speed, , the speed at which the wire rod 1 wound around the winding core 8a moves in the longitudinal direction always changes. In such a state, when the storage wire spool 4 itself is rotated instead of the payout pulley 7, the storage wire spool 4 is mainly wound with copper wire and is relatively heavy, so its moment of inertia is large and storage When the rotation speed of the wire spool 4 cannot be rapidly accelerated or decelerated, and the speed of the wire 1 at the supply destination fluctuates greatly, the supply of the wire 1 cannot be followed. This causes a problem that it becomes difficult to maintain the applied tension at a predetermined value.

The present invention has been made with attention to such problems, and its object is to keep the tension applied to the wire to a predetermined value even when the speed of the wire at the supply destination fluctuates greatly. The object is to provide a tensioned wire feeder that can be maintained.

It is another object of the present invention to provide a tension-applying wire feeder capable of drawing out a wire with a predetermined tension without twisting the wire.

The present invention includes a wire storage spool on which a wire is wound and stored, a feeding pulley on which the wire unwound from the wire storage spool is wound and rotated to feed the wire, and a wire fed from the feeding pulley. tension applying means for applying a predetermined tension to the forward wire; tension detecting means for detecting the tension of the wire applied by the tension applying means; This is an improvement of a tension-applying wire feeder provided with pay-out speed control means for controlling the rotation speed of the pay-out pulley.

Its characteristic configuration is provided with wire storage means for pulling and storing the wire unwound from the wire storage spool and heading for the payout pulley, and feeding the stored wire to the rotating payout pulley.

In this tension-applying wire rod supply device, the wire storage means includes a pair of diverting pulleys provided with a gap in the wire passage between the wire storage spool and the delivery pulley, and the wire between the pair of diverting pulleys. and an urging means for moving the wire storage pulley in a direction intersecting the wire passage.

Further, an unwinding motor that rotates the storage wire spool to unwind the wire rod from the storage wire spool, a position detection device that detects the position of the storage wire pulley urged by the urging device, and a position detected by the position detection device. An unwinding speed control means for controlling the unwinding motor so that the position of the wire storage pulley is at a predetermined position may be provided, and the wire storage lever pivotally supported at the tip of the wire storage pulley rotates around the rotation fulcrum. , the urging means is an urging elastic member that exerts an elastic force corresponding to the rotation angle of the wire storage lever, and the position detection means is an encoder that detects the rotation angle of the wire storage lever; Preferably it is a potentiometer.

Furthermore, it is preferable that the tension applied by the tension applying means to the wire drawn out from the pay-out pulley and directed to the wire supply destination is equal to or higher than the tension applied by the urging means to the wire stored by the wire storage means.

The tension-applying wire feeding device of the present invention is provided with wire storage means for pulling and storing the wire unwound from the wire storage spool and directed to the pay-out pulley, so that the pay-out pulley that rotates pays out the stored wire. Therefore, it is possible to make the rotation of the feeding pulley follow the speed change of the wire at the supply destination without causing any trouble in drawing the wire by the rotating feeding pulley.

Therefore, even if the speed of the wire rod at the supply destination fluctuates greatly, the wire rod can be supplied while maintaining the tension applied to the wire rod at a predetermined value by causing the rotation of the delivery pulley to follow the speed change. becomes possible.

Further, if an unwinding motor is provided to rotate the storage wire spool and unwind the wire from the storage wire spool, the wire can be paid out with a predetermined tension without twisting the wire.

FIG. 2 is a side view showing a tensioning wire rod feeding device according to an embodiment of the present invention; It is a front view of the supply apparatus of the tension|tensile_attachment wire. FIG. 2 is a view corresponding to FIG. 1 showing a conventional tensioning wire feeding device;

BEST MODE FOR CARRYING OUT THE INVENTION Next, the best mode for carrying out the present invention will be described with reference to the drawings.

1 and 2 show a tensioning wire feeding device 10 according to the present invention. In each figure, three axes of X, Y, and Z are set perpendicular to each other, the X axis extending in a substantially horizontal front-rear direction, the Y axis extending in a substantially horizontal lateral direction, and the Z axis extending in a vertical direction. A configuration of the supply device 10 will be described.

As shown in FIG. 1, a tension-applying wire supply device 10 in this embodiment supplies a wire 11 under tension to a winding machine 12 for winding the wire 11. In the machine 12, the winding core 12a is rotated at a constant speed, and the supplied wire rod 11 is wound around the winding core 12a. Therefore, when the cross section of the winding core 12a is square, the speed at which the wire rod 11 wound by the winding machine 12 moves in the longitudinal direction always changes when the winding core 12a is rotated at a constant speed. However, the tension-applied wire rod feeding device 10 of the present invention can supply the wire rod 11 while applying a predetermined tension regardless of the change in the winding speed.

Specifically, the tension-applying wire rod supply device 10 of the present invention includes a wire storage spool 13 on which the wire rod 11 is wound and stored, and the wire rod 11 unwound from the wire storage spool 13 are wound around, A feeding pulley 14 for feeding out the wire rod 11 by rotation and a tension imparting means 15 for applying a predetermined tension to the wire rod 11 fed from the feeding pulley 14 toward a winding machine 12 to which the wire rod is supplied are provided.

This tensioning wire rod supply device 10 has a base 10a provided near the winding machine 12. A support frame 10b is erected on the base 10a, and a casing 10c is further above the support frame 10b. be provided. A delivery pulley 14 is provided on the front surface of the casing 10c.

As shown in FIG. 1, the tension applying means 15 in this embodiment for applying a predetermined tension to the wire rod 11 to be fed out by the rotation of the feeding pulley 14 is provided on the side surface of the casing 10c around a pivot point 16b. A rotatably provided tension bar 16, a wire rod guide 16a provided at the tip of the tension bar 16 and passing the wire rod 11 drawn out from the feeding pulley 14, a rotation fulcrum 16b of the tension bar 16 and the wire rod. A tension elastic member 17 is provided at a predetermined position between the guide 16a and exerts an elastic force on the tension bar 16 in accordance with its rotation angle.

The tension elastic member in this embodiment is a coil spring 17, which applies a biasing force in the direction of rotation of the tension bar 16 to a predetermined position between the rotation fulcrum 16b of the tension bar 16 and the wire guide 16a. One end of a coil spring 17, which is an elastic member for tension, is attached via an attachment bracket 16c. The tension bar 16 is suspended in a tilted state by a coil spring 17, which is an elastic member for tension, and the coil spring 17 applies an elastic force to the tension bar 16 in accordance with the rotation angle, so that the casing 10c is secured. A stopper member 16d that limits the rotation range of the tension bar 16 is provided on the side surface.

A proximal end 18a of an adjusting bar 18 is pivotally provided on the side surface of the casing 10c so as to be substantially parallel to the tension bar 16, and the other end of the coil spring 17 is fixed to a distal end 18b of the adjusting bar 18. As shown in FIG. A tension adjusting screw 19 is pivotally supported in the middle of the adjusting bar 18 so as to extend in a direction intersecting with the swing plane. provided through

Therefore, the tension adjusting screw 19 moves in the axial direction as the female screw member 20 rotates, and the adjusting bar 18 can be tilted. Then, the coil spring 17, the other end of which is provided at the tip 18b of the adjustment bar 18, varies in its entire length, so that the elastic force exerted on the tension bar 16, to which one end of the coil spring 17 is provided, can be changed.

The wire rod 11 fed out from the feeding pulley 14 is guided to the wire rod guide 16a at the tip of the tension bar 16, and the wire rod 11 guided to the wire rod guide 16a is sent from the wire rod guide 16a to the winding machine 12 to which the wire rod is supplied. Wired as supplied.

Here, the wire 11 passing through the wire rod guide 16a at the tip of the tension bar 16 to which the elastic force is exerted is pulled by the elastic force exerted on the tension bar 16, and a predetermined tension is generated. . Therefore, the tension of the wire rod 11 applied by the tension bar 16 to which the elastic force is exerted can be varied and adjusted by the rotation of the female screw member 20 .

Further, the tension-applying wire rod feeding device 10 of the present invention includes tension detecting means 21 for detecting the tension of the wire 11 applied by the tension applying means 15, and the tension detected by the tension detecting means 21 having a predetermined value. and a delivery speed control means for controlling the rotation speed of the delivery pulley 14 so that

Specifically, the rotating shaft 14a of the payout pulley 14 is directly connected to the payout control motor 22 housed in the casing 10c. The tension bar 16 is rotatable around a fulcrum 16b at the proximal end. It is detected by a potentiometer 21 as means.

A detection output of the potentiometer 21 is inputted to a controller (not shown) serving as a feeding speed control means, and a control output from the controller is connected to the feeding control motor 22 . A controller (not shown) serving as a payout speed control means is configured to control the payout control motor 22 so that the rotation angle of the tension bar 16 detected by the potentiometer 21 serving as tension detection means becomes a predetermined angle. be. In this way, the tension bar 16 is prevented from swinging, and the fluctuation of the tension of the wire rod 11 caused by the swinging of the tension bar 16 is prevented.

In addition, the wire storage means 25 for storing the wire 11 unwound from the wire storage spool 13 is provided between the wire storage spool 13 and the pay-out pulley 14 in the tensioning wire rod supply device 10 .

In this embodiment, an unwinding motor 24 that rotates the wire storage spool 13 to unwind the wire 11 from the wire storage spool 13 is provided on the support frame 10b below the casing 10c with its rotating shaft 24a horizontal. The storage wire spool 13 is coaxially attached to the rotating shaft 24a. Therefore, when the unwinding motor 24 is driven, the wire storage spool 13 is rotated to unwind the wire 11 from the outer periphery of the wire storage spool 13 in the tangential direction, and the unwound wire 11 is moved to the delivery pulley 14 located above. configured to go

The wire storage means 25 in this embodiment includes a pair of diverting pulleys 26 and 27 provided with a gap in the wire passage L (FIG. 1) between the wire storage spool 13 and the delivery pulley 14, and the pair of A storage wire pulley 28 on which the wire 11 is wound between the turning pulleys 26 and 27 and is provided movably in a direction intersecting the wire passage L; and an urging means 29 for urging in a direction away from the wire passage L between.

A base end of a wire storage lever 30 is pivotally supported via a bracket 10e on the support frame 10b below the casing 10c, and a wire storage pulley 28 is pivotally supported at the tip of the wire storage lever 30. As shown in FIG. Between the rotation fulcrum 30a at the base end of the wire storage lever 30 and the wire storage pulley 28, one end of a coil spring 29 as an urging means that exerts an elastic force on the wire storage lever 30 according to the rotation angle thereof is provided. is attached.

The wire storage lever 30 in this embodiment is provided substantially vertically, and the wire storage pulley 28 is pivotally supported at its lower end. It is provided extending horizontally in a direction away from. A bracket 10 e is extended onto the extension of the coil spring 29 extending in the horizontal direction. One end of the male threaded member 31 is provided with the other end of the coil spring 29, and the bracket 10e thereof is provided with a female threaded member 32 capable of adjusting the movement of the male threaded member 31 in the longitudinal direction.

Therefore, as the female threaded member 32 rotates, the male threaded member 31 moves in the axial direction, the coil spring 29 provided with the other end of the male threaded member 31 changes in its entire length, and the wire storage lever provided with one end of the coil spring 29 changes. The elastic force for tilting 30 is configured to be changeable and adjustable.

Then, the wire rod 11 unwound from the wire storage spool 13 and directed upward is turned by the lower diverting pulley 26 and extended in the horizontal direction, and then wound around the wire storage pulley 28 and folded back, and the upper diverting pulley 27 is turned. It is routed so as to be further turned by and guided to the pay-out pulley 14 existing above. Therefore, in the wire storage means 25, between the pair of diverting pulleys 26 and 27, the length of the wire rod 11 that is looped around the wire storage pulley 28 and detoured can be stored.

In addition, the elastic force for tilting the wire storage lever 30 urges the wire storage pulley 28 provided at the lower end thereof in the direction away from the wire passage L, and the wire rod 11 wound around the wire storage pulley 28 is elastically moved. Since the tension is applied based on the force, the wire storage means 25 capable of changing and adjusting the elastic force for tilting the wire storage lever 30 is configured so that the tension applied to the wire rod 11 can also be adjusted.

Here, reference numeral 33 in FIGS. 1 and 2 designates an auxiliary pulley 33 which is pivotally supported on the front surface of the casing 10c adjacent to the delivery pulley 14 and guides the wire rod 11 extending upward from the upper turning pulley 27 to the delivery pulley 14. , and reference numeral 34 denotes an auxiliary pulley 34 which is pivotally supported adjacent to the delivery pulley 14 on the side surface of the casing 10c and which deflects the wire 11 delivered from the delivery pulley 14 toward the wire guide 16a.

In addition, the tension applying wire rod supply device 10 includes a position detecting means 36 for detecting the position of the wire storage pulley 28, and a position detection means 36 for adjusting the position of the wire storage pulley 28 detected by the position detecting means 36 to a predetermined position. and an unwinding speed control means for controlling the unwinding motor 24 .

Specifically, the bracket 10e at the upper end of the wire storage lever 30 is provided with a potentiometer 36 as position detection means. A control output from the controller is connected to the unwinding motor 24 .

A controller (not shown) serving as unwinding speed control means controls the unwinding motor 24 so that the rotation angle of the wire storage lever 30 detected by the potentiometer 36 as position detecting means becomes a predetermined angle. The length of the wire rod 11 that is looped around the storage pulley 28 and detoured between the turning pulleys 26 and 27 is kept constant.

By operating the female screw member 32, the tension applied to the wire 11 between the pair of turning pulleys 26 and 27 by the coil spring 29, which is the biasing means, is applied to the wire 11 beyond the delivery pulley 14 by the tension applying means 15. It is adjusted so that it is equal to or less than the applied tension.

Next, a method for supplying a tension-applying wire using the tension-applying wire-supplying device configured as described above will be described.

The method of supplying a tension-applying wire using the above-described tension-applying wire supply device 10 is as follows. By rotating the delivery pulley 14 while applying a predetermined tension to the wire 11, the tension imparted wire 11 is delivered to the wire delivery destination.

Specifically, the wire rod 11 to be supplied is wound and stored on a storage wire spool 13, and this storage wire spool 13 is coaxially attached to a rotating shaft 24a of an unwinding motor 24 provided below the casing 10c.

The wire rod 11 is unwound from the wire storage spool 13, the unwound wire rod 11 is guided upward, turned by the lower diverting pulley 26 and extended in the horizontal direction, and then folded back by the wire storage pulley 28. - 特許庁Then, it is further deflected by the upper deflecting pulley 27 and led through the auxiliary pulley 33 to the delivery pulley 14 existing above.

In the feeding pulley 14, after the wire 11 is wound a plurality of times, it is deflected by the auxiliary pulley 34 and guided to the wire guide 16a at the tip of the tension bar 16. The wire 11 guided to the wire guide 16a is passed through the wire guide 16a. Supply to the destination.

In this embodiment, the wire rod 11 is supplied to the winding machine 12. In the winding machine 12, the winding core 12a is rotated at a constant speed, and the supplied wire rod 11 is wound around the winding core 12a. It shall be wound around.

When the wire rod 11 supplied to the winding machine 12 is wound around the winding core 12a, the tensioning wire rod feeding device 10 rotates the feeding pulley 14 to supply the amount of wire rod 11 used for the winding. It will be rolled out sequentially.

However, since the wire rod 11 fed from the feeding pulley 14 is directed toward the winding machine 12 via the wire rod guide 16a at the tip of the tension bar 16, the coil spring tends to pull back the tension bar 16 in the direction opposite to the supply direction. 17 applies tension to the wire rod 11 via the tension bar 16 , and the wire rod 11 to which a predetermined tension is applied is supplied to the winding machine 12 .

Therefore, the tension applied to the wire 11 fluctuates due to the elastic force of the tension bar 16 pulled back by the coil spring 17, and the tension applied to the wire 11 is set by rotating the female screw member 20 with the tension adjusting screw. 19 is moved in the axial direction to tilt the adjustment bar 18, and the full length of the coil spring 17 having the other end provided at the tip thereof is variably adjusted.

Also, the tension bar 16 is rotatable about a fulcrum 16b at its proximal end. It is detected by a potentiometer 21 as tension detecting means.

Then, a controller (not shown) serving as pay-out speed control means controls the pay-out control motor 22 so that the rotational angle detected by the potentiometer 21 serving as tension detection means becomes a predetermined angle. The amount of supply of the wire rod 11 is adjusted to keep the inclination of the tension bar 16 constant to prevent the tension applied to the wire rod 11 from fluctuating, and the wire rod 11 to which a constant tension is applied is wound as the supply destination. It will be supplied to the wire machine 12 .

In the winding machine 12, the supplied wire 11 is wound around the outer circumference of the winding core 12a which rotates at a constant speed. Here, if the wire storage spool 13 is heavy and has a large moment of inertia, the wire storage spool 13 cannot be quickly rotated and stopped, and the speed fluctuation of the wire rod 11 moving in the longitudinal direction at the supply destination is large, It becomes difficult to cause the rotational speed of the wire storage spool 13 to follow the speed change of the wire rod 11 at the supply destination.

However, in the tensioning wire rod supply device 10 of the present invention, the wire storage means 25 for storing the wire rod 11 unwound from the wire storage spool 13 is interposed between the wire storage spool 13 and the delivery pulley 14. In the supply method, the wire rod 11 unwound from the wire storage spool 13 is detoured and stored, and the reeling-out pulley 14 that rotates the stored wire rod 11 reels out the wire rod 11 .

That is, the wire rod 11 unwound from the wire storage spool 13 extends horizontally between the pair of diverting pulleys 26 and 27, is turned around by the wire storage pulley 28, and is thereby stored. A wire storage lever 30 having a wire storage pulley 28 pivotally supported at its lower end is urged by a coil spring 29 as an urging means in a direction to move the wire storage pulley 28 away from the pair of deflection pulleys 26 and 27 existing in the wire passage L. Since it is energized, the stored wire 11 is also maintained in a state of being given a predetermined tension, and then guided to the delivery pulley 14 .

The tension imparted to the wire rod 11 by the tension imparting means 15 urges the pay-out pulley 14 in the direction to rotate the wire rod 11 in the pay-out direction, and the tension imparted to the wire rod 11 by the urging means 29 rotates the pay-out pulley 14. The wire rod 11 is urged to rotate in the direction opposite to the feeding direction.

Therefore, if the tension applied to the wire rod 11 by the coil spring 29, which is the biasing means, is the same as the tension applied to the wire rod 11 by the tension applying means 15, no force will be generated to hinder the rotation of the delivery pulley 14. However, if the tension applied to the wire 11 by the biasing means 29 is less than the tension applied to the wire 11 by the tension applying means 15, the rotation of the feeding pulley 14 in the direction to feed the wire 11 is not hindered. Therefore, even if the speed of the wire rod 11 at the supply destination fluctuates greatly, the rotation of the delivery pulley 14 by the delivery speed control means (not shown) can follow the speed change.

That is, the drawing speed control means (not shown) controls the drawing control motor 22 so that the rotation angle detected by the potentiometer 21, which is the tension detection means, becomes a predetermined angle, and the inclination of the tension bar 16 becomes constant. , the rotational speed of the delivery pulley 14 is accelerated or decelerated. As a result, while preventing fluctuations in the tension applied to the wire 11, the wire 11 to which a constant tension is applied is supplied to the winding machine 12, which is the supply destination.

On the other hand, when the rotational speed of the feed pulley 14 is accelerated or decelerated so that the feed pulley 14 feeds the wire 11 stored between the pair of diverting pulleys 26 and 27, the amount of the stored wire 11 decreases. As the wire pulley 28 approaches the wire passage L, the wire storage lever 30 having the wire storage pulley 28 at its lower end tilts. This tilting of the wire storage lever 30 is detected by a potentiometer 36, and an unwinding speed control means comprising a controller (not shown) controls the unwinding motor 24 so as to maintain the wire storage lever 30 at a predetermined angle, thereby rotating the wire storage spool. 13 is rotated, and the wire rod 11 is newly unwound from the wire storage spool 13 and stored.

Here, since the wire storage spool 13 has a relatively large weight, the moment of inertia of the wire storage spool 13 is large. It is not possible to change the rotation speed of 13 to follow. Therefore, the amount of the wire 11 stored between the pair of diverting pulleys 26 and 27 fluctuates, and the wire storage lever 30 having the wire storage pulley 28 attached to its lower end swings.

Specifically, when the winding speed of the wire rod 11 in the winding machine 12 increases and the rotation speed of the feeding pulley 14 for feeding the wire rod 11 accelerates, the rotation of the storage wire spool 13 also accelerates. The rotation of the wire spool 13 cannot be accelerated immediately, the amount of wire 11 stored between the pair of diverting pulleys 26 and 27 decreases, and as indicated by the solid arrow in FIG. The wire storage lever 30 swings so as to approach the wire passage L.

Conversely, when the winding speed of the wire rod 11 in the winding machine 12 decreases and the rotation speed of the feeding pulley 14 for feeding the wire rod 11 also decreases, the rotation of the storage wire spool 13 also decreases accordingly. The rotation of the spool 13 cannot be immediately decelerated, the amount of wire 11 stored between the pair of diverting pulleys 26 and 27 increases, and as indicated by the dashed arrow in FIG. The wire storage lever 30 swings away from the passage L.

As described above, when the winding speed of the wire rod 11 in the winding machine 12 changes, the amount of the wire rod 11 stored by the wire storage means 25 fluctuates and the wire storage lever 30 swings. 11, the tension bar 16, which is the tension applying means 15, does not swing. Therefore, even if the speed of the wire 11 at the supply destination fluctuates greatly, it is possible to stably supply the wire 11 to the supply destination while maintaining the tension applied to the wire 11 at a predetermined value.

Since the wire accumulating spool 13 is rotated to unwind the wire 11, the wire 11 guided by the payout pulley 14 via the wire accumulating means 25 is not twisted, and the tension fluctuation due to the twist of the wire 11 is prevented. It becomes possible to prevent it.

In the above-described embodiment, the tension detection means and the position detection means are potentiometers for detecting the rotation angles of the tension bar 16 and the wire storage lever 30. However, the tension detection means and the position detection means are , an encoder for detecting the rotation angle of the tension bar 16 and the wire storage lever 30, or other types of sensors as long as they can detect the positions of the wire rod guide 16a and the wire storage pulley 28.

In the above-described embodiment, the tension applying means and the biasing means have the coil springs 17 and 29, respectively. A leaf spring or other elastic body may be used as the biasing means.

REFERENCE SIGNS LIST 10 tension-applying wire supply device 11 wire 13 wire storage spool 14 delivery pulley 15 tension-applying means 21 tension detection means 24 unwinding motor 25 wire storage means 26, 27 diverting pulley 28 wire storage pulley 29 biasing elastic member (biasing means)
30 wire storage lever 30a rotation fulcrum 36 potentiometer (position detection means)
L wire passage

Claims (2)

A storage wire spool (13) around which the wire rod (11) is wound and stored;an unwinding motor (24) for rotating the wire spool (13) to unwind the wire (11) from the wire spool (13);The wire rod (11) unwound from the wire storage spool (13) is wound around and rotated by a feeding pulley (14) for feeding the wire rod (11), and the wire rod is fed from the feeding pulley (14). Tension applying means (15) for applying a predetermined tension to the forward wire (11), and tension detecting means (21) for detecting the tension applied to the wire (11) by the tension applying means (15). and a feeding speed control means for controlling the rotation speed of the feeding pulley (14) so that the tension detected by the tension detecting means (21) becomes a predetermined value,
A pair of diverting pulleys (26, 27) provided with a gap in the wire rod passage (L) between the wire storage spool (13) and the delivery pulley (14) and around a rotation fulcrum (30a) a wire storage pulley (28) pivotally supported at the tip of a rotatably provided wire storage lever (30) and around which the wire rod (11) is wound between the pair of diverting pulleys (26, 27); It is composed of an urging elastic member (29) that exerts an elastic force corresponding to the rotation angle of the wire storage lever (30), and biases the wire storage pulley (28) in a direction intersecting with the wire passage (L). means (29); The wire rod (11) unwound from the wire storage spool (13) and directed to the delivery pulley (14) is pulled around and stored, and the stored wire rod (11) is fed to the rotating delivery pulley (14). Storage means for sending out (25)When,
Position detection means () comprising an encoder or potentiometer (36) for detecting the rotational angle of the wire storage lever (30) for detecting the position of the wire storage pulley (28) biased by the biasing means (29) 36) and
unwinding speed control means for controlling the unwinding motor (24) so that the position of the storage pulley (28) detected by the position detecting means (36) is at a predetermined position;
A supply device for a tensioning wire, comprising: The tension applied by the tension applying means (15) to the wire rod (11) drawn out from the feeding pulley (14) toward the wire rod supply destination is applied to the wire rod (11) stored by the wire storage means (25). 2. The tensioning wire feeding device according to claim 1, wherein the tension is the same as or higher than the tension generated by (29).

Images