JP2009046778A - Winding tension control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding tension control device that can appropriately adjust winding tension in association with a yarn slack-eliminating device during winding of a spun yarn. <P>SOLUTION: A winding tension control device 8 incorporated into a spinning machine having a yarn slack-eliminating device 7 to control winding tension comprises a yarn path-bending guide 81 located close to and on downstream side of a slack-eliminating roller 71 to guide a yarn traveling from the slack-eliminating device 7 to a winding device 9 while bending a yarn path of the yarn, and a yarn path-bending guide-displacing device 82 that makes the yarn path-bending guide 81 to approach the slack-eliminating roller 71 to set an angle of the bending to a larger bending angle θ<SB>1</SB>, when the winding tension is to be increased, while moves the yarn path-bending guide 81 way from the slack-eliminating roller 71 to set the angle of the bending to a smaller bending angle θ<SB>2</SB>, when the winding tension is to be reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a spinning device that spins a yarn from a fiber bundle, a winding device that winds the spun yarn around a package, and a yarn between the spinning device and the winding device that is wound around a slack take-up roller. The present invention relates to a winding tension control device that is incorporated in a spinning machine including a yarn slack eliminating device that absorbs slack in the yarn and controls the winding tension.

  2. Description of the Related Art Conventionally, there is a spinning machine that uses a sliver (fiber bundle) as a raw material to produce spun yarn with a spinning device, and winds this with a winding device to form a package. In this spinning machine, for example, when a yarn defect is detected, the yarn defect portion is cut and removed by a cutting means such as a cutter, and then the leading end of the yarn successively sent from the spinning device and the package side The yarn end is configured to be spliced by a yarn splicing device. Since this yarn splicing operation is performed in a state where the yarn winding is stopped while the operation of the spinning device is continued, yarn slack occurs between the spinning device and the winding device, and it is necessary to remove the slack. It was.

  Further, in the above spinning machine, for example, when forming a cone winding package, there is a problem that periodic tension fluctuation of the yarn occurs according to the traverse unless the winding tension control immediately before winding is performed. This is because the yarn winding speed (package peripheral speed) is different between the small diameter side and the large diameter side of the cone winding package, the amount of slack increases on the small diameter side where the winding speed is small, and the large diameter side where the winding speed is large. This is because the amount of slack is reduced.

  Therefore, in order to deal with the above problem, a yarn slack eliminating device described in Patent Document 1 has been proposed. The yarn slack eliminating device described in Patent Document 1 includes a slack eliminating roller 21 that is rotationally driven, and a rotary yarn hooking member 22. The yarn hooking member 22 is attached to the slack eliminating roller 21 so as to be relatively concentrically rotatable. A predetermined rotational resistance is applied to the relative rotation of the yarn hooking member 22 with respect to the slack eliminating roller 21 by the pressing force (frictional force) of the transmission force applying member 22f composed of a biasing means such as a spring. Further, the rotational resistance can be adjusted steplessly by the tightening operation of the transmission force adjusting operation portion 22g having a screwing portion.

  Also, a magnetic yarn slack eliminating device described in Patent Document 2 has been proposed. The yarn slack eliminating device 12 described in Patent Document 2 generates a predetermined rotational resistance between the slack eliminating roller 21 and the rotatable yarn hooking member 22 by a combination of the hysteresis material 37 and the permanent magnet 36. It has become. Further, the rotational resistance can be adjusted steplessly by changing the overlapping area of the hysteresis member 37 and the permanent magnet 36 by rotating the adjusting bolt 32.

  In any of the yarn slack eliminating devices described above, when the load acting on the yarn hooking member 22, that is, the yarn tension, is smaller than the rotational resistance, the yarn hooking member 22 rotates integrally with the slack eliminating roller 21 to loosen the spun yarn. It is wound around the take-up roller 21. On the other hand, when the tension of the yarn exceeds the predetermined value and overcomes the rotational resistance, the yarn hooking member 22 rotates independently of the slack eliminating roller 21 and unwinds the spun yarn from the slack eliminating roller 21.

Therefore, according to the yarn slack eliminating device, it is possible not only to eliminate the slack of the yarn, but also to apply a predetermined winding tension to the spun yarn by appropriately setting the rotation resistance.
JP 2004-277946 A (FIG. 18, paragraph numbers [0024] to [0026]) JP 2006-306588 A (FIG. 4, paragraph numbers [0042] to [0044])

  However, in any of the above yarn slack eliminating devices, in order to adjust the rotational resistance of the yarn hooking member with respect to the slack eliminating roller, it is necessary to stop the yarn winding, and the winding tension is adjusted while continuing the winding. It was impossible to do. Further, in order to adjust the rotational resistance, it is necessary to perform manually, and in a spinning machine in which a plurality of spindle units are arranged in parallel, the rotational resistance of the yarn slack eliminating device varies between the spindles. Etc. had to be adjusted appropriately for each weight, which was a very complicated operation.

  On the other hand, when forming the package in the winding device, the winding tension is increased while the winding diameter is small, and the winding tension is decreased as the winding diameter increases, whereby a clean package shape can be obtained. For this purpose, a device capable of changing the winding tension during the winding of the yarn is required.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a winding tension control device capable of appropriately adjusting a winding tension in conjunction with a yarn slack eliminating device during winding of a spun yarn. Is to provide.

  In order to solve the above-described problems, the present invention provides (1) a spinning device for spinning a yarn from a fiber bundle, a winding device for winding the spun yarn into a package, and between the spinning device and the winding device. A winding tension control device for controlling a winding tension incorporated in a spinning machine having a yarn slack eliminating device that winds the yarn of the yarn around a slack eliminating roller and absorbs the slack of the yarn. A yarn path bending guide disposed near and downstream of the roller and guiding the yarn path of the yarn from the yarn slack eliminating device toward the winding device, and when the winding tension is to be increased, the yarn When the winding tension is to be lowered while bringing the path bending guide closer to the slack eliminating roller, while the winding tension is to be lowered, the yarn path bending guide is separated from the slack eliminating roller so that the bending angle is increased. Make smaller And it provides a winding tension control device characterized by comprising a yarn path bending guide displacing device.

  Further, the present invention provides the winding tension control device characterized in that, in the above configuration, (2) the yarn path bending guide guides the yarn through a guide hole through which the yarn passes. To do.

  In the configuration (2), the present invention relates to (3) the yarn path bending guide displacement device, wherein the center of the guide hole is displaced on an extension line of the shaft of the slack eliminating roller. The present invention provides a winding tension control device characterized by displacing the armature.

  According to the present invention, in the above configurations (1) to (3), (4) the yarn path bending guide displacement device includes a tension detection unit that detects a tension of the yarn from the yarn slack eliminating device to the winding device. The winding tension control device is characterized in that the yarn path bending guide is displaced based on the above signal.

  According to the present invention, in the configurations (1) to (4), (5) the yarn path bending guide displacement device further includes the yarn path based on a signal from a winding diameter detecting means for detecting a winding diameter of the package. The present invention provides a winding tension control device characterized in that the bending guide is displaced.

  According to the winding tension control device of the present invention configured as described above, the yarn path bending guide is appropriately approached or separated from the slack eliminating roller of the yarn slack eliminating device during winding of the spun yarn. As a result, the bending angle of the yarn path of the spun yarn from the tip of the yarn hooking member to the winding device via the yarn path bending guide is adjusted, and the winding tension is adjusted. That is, according to the winding tension control device of the present invention, the winding tension can be appropriately adjusted during winding.

  According to the winding tension control device of the present invention, the winding tension is adjusted by mechanically displacing the yarn path bending guide. Therefore, in a spinning machine with multiple spindle units arranged side by side, even if the rotational resistance of the yarn slack eliminating device varies between each spindle, the rotational resistance is adjusted manually for each spindle. There is no complication to do.

Hereinafter, a preferred embodiment of a winding tension control device of the present invention will be described with reference to the drawings.
1 is a schematic front view showing an example of a spinning machine to which the winding tension control device of the present invention is applied, FIG. 2 is a schematic side view of the spinning machine of FIG. 1, and FIG. 3 is a yarn slack remover in the spinning machine of FIG. 4 is a side sectional view of the main part showing the apparatus and the winding tension control device, FIG. 4 is a side sectional view of the main part showing a state in which the adjustment bolt of the yarn slack eliminating device in FIG. 3 is rotated and moved, and FIG. FIG. 3 is a perspective view showing a yarn slack eliminating device and a winding tension control device in a spinning machine.

  As shown in FIG. 1, the spinning machine 1 according to the present embodiment is configured by arranging a large number of spinning units U in parallel in the longitudinal direction of the machine base between the prime mover box MB and the dust box DB. A rail R along the direction in which the spinning units U are arranged is provided at the lower part of the spinning machine 1. On the rail R, the yarn splicing cart 3 is disposed so as to be capable of reciprocating along the direction in which the spinning units U are arranged side by side. The yarn joining cart 3 travels toward the spinning unit U that requires yarn joining, stops at the corresponding position, and performs the yarn joining operation.

  As shown in FIG. 1 or 2, the spinning unit U includes a draft device 4, a spinning device 5, a yarn feeding device 6, a yarn slack eliminating device 7, and a winding tension control in order from upstream to downstream. The apparatus 8, the downstream guide 10, and the winding device 9 are equipped as main components.

  The draft device 4 includes a combination of a back roller pair 41, a third roller pair 42, a middle roller pair 44 on which an apron belt 43 is mounted, and a front roller pair 45. The draft device 4 extends the sliver SL to form the fiber bundle Y.

  Although the detailed configuration of the spinning device 5 is not illustrated, in this embodiment, a pneumatic type that generates the spun yarn SY from the drafted fiber bundle Y using the swirling airflow from the air injection nozzle is adopted. Yes.

  The yarn feeding device 6 includes a delivery roller 61 and a nip roller 62 provided so as to be in contact with the delivery roller 61. The spun yarn SY delivered from the spinning device 5 is sandwiched between the delivery roller 61 and the nip roller 62 and is sent downward by the rotation of the delivery roller 61.

  The spun yarn SY sent to the downstream side by the yarn feeding device 6 includes a cutter device 16 and a yarn clearer 17, a yarn slack eliminating device 7, a winding tension control device 8, and a downstream guide 10 for removing defects of the yarn. After that, the take-up device 9 takes up the take-up package WP.

  The yarn clearer 17 monitors the thickness of the traveling spun yarn SY, and transmits a yarn defect detection signal to a unit controller (not shown) when a yarn defect of the spun yarn SY is detected. Upon receipt of the yarn defect detection signal, the unit controller immediately operates the cutter device 16 to cut the yarn, stops the draft device 4 and the spinning device 5, and moves the yarn joining cart 3 to the front of the spinning unit U. Self-run. Thereafter, the spinning device 5 and the like are driven again to cause the yarn joining cart 3 to perform yarn joining, so that spinning and winding are resumed.

  As shown in FIG. 1, the yarn joining cart 3 is arranged so as to travel along a rail R provided in the casing 2 of the spinning machine 1 main body. The yarn joining cart 3 includes a suction pipe (supply side yarn end catching means) 18 for sucking and catching the spun yarn SY continuously supplied from the spinning device 5 on the supply side, and the spun yarn SY on the winding package WP side. A suction mouth (winding side yarn end catching means) 19 and a splicing device 20 for connecting the spun yarns SY captured by the suction pipe 18 and the suction mouth 19.

  A suction air flow is generated at the ends of the suction pipe 18 and the suction mouth 19 by a suction flow generation source (not shown), and the yarn ends are sucked and captured. The yarn splicing device 20 includes a clamp part, a cutter part, and a splicer or knotter (not shown).

  The yarn slack eliminating device 7 is provided for each of the plurality of spinning units U, and is arranged to be able to engage with the spun yarn SY. As shown in FIG. 2 or FIG. 3, the yarn slack eliminating device 7 includes a slack eliminating roller 71, a yarn hooking member 72, an upstream guide 73, and an advancing / retracting means (for example, air Cylinder) 74 and a rotational drive source 75 that rotationally drives the slack eliminating roller 71.

  The rotation drive source 75 is composed of an electric motor or the like, and is attached to the spinning unit U via a bracket 70.

  As shown in FIG. 3, the slack eliminating roller 71 includes a roller main body 71a and a nut member 71b that is integrally fixed to the roller main body 71a as main components.

  The roller body 71a is fixed to the rotation shaft 75a of the rotation drive source 75 by a fixing screw 71f.

  An adjustment bolt 71c is screwed onto the nut member 71b from the tip end side of the roller body 71a. The adjustment bolt 71c has a through hole coaxial with the main body. The through hole receives the shaft portion 72a of the yarn hooking member 72 via the bearing 71d.

  As shown in FIG. 3, the yarn hooking member 72 includes a shaft portion 72a and a flyer 72b attached to one end of the shaft portion 72a. The thread hooking member 72 is attached to the slack eliminating roller 71 so that it can rotate concentrically by the shaft portion 72a being inserted into the through hole of the adjusting bolt 71c and supported by the bearing 71d.

  The flyer 72b has a shape that is appropriately curved at the tip thereof, engages with the spun yarn SY (hangs the spun yarn SY), and securely winds the spun yarn SY around the outer peripheral surface of the roller 71. It has come to let you.

  The shaft portion 72a of the yarn hooking member 72 includes an enlarged diameter portion 72c at an intermediate portion in the axial direction. The outer peripheral surface of the enlarged diameter portion 72c can be opposed to the inner peripheral surface of the adjustment bolt 71c. A permanent magnet 72d is disposed on the outer peripheral surface of the enlarged diameter portion 72c. The permanent magnet 72d is alternately magnetized in the circumferential direction with N poles, S poles, N poles, S poles, and so on. On the other hand, a hysteresis material (semi-hard magnetic material) 71e is disposed on the inner peripheral surface of the adjusting bolt 71c. The permanent magnet 72d of the enlarged diameter portion 72c faces the hysteresis material 71e of the adjustment bolt 71c with an appropriate gap (that is, in a non-contact manner).

The adjustment bolt 71c is displaced relative to the nut member 71b by grasping the head with a hand (or using an appropriate tool) and rotating the adjustment bolt 71c. At this time, the adjustment bolt 71 c is relatively displaced with respect to the enlarged diameter portion 72 c of the yarn hooking member 72. As a result, the facing area between the hysteresis material 71e and the permanent magnet 72d changes.
FIG. 4 shows a state in which the adjustment bolt 71c is displaced relative to the slack eliminating roller 71 from the state of FIG.

  By changing the facing area between the permanent magnet 72d and the hysteresis member 71e as described above, the magnitude of the rotational resistance of the flyer 72b with respect to the slack eliminating roller 71 can be adjusted steplessly.

  That is, when the permanent magnet 72d and the hysteresis member 71e are opposed to each other with a large area as shown in FIG. 3, the degree of magnetic coupling between the permanent magnet 72d and the hysteresis member 71e is strong. A strong resistance against the relative rotation with respect to the take-up roller 71 is generated. On the other hand, as shown in FIG. 4, when the facing area between the permanent magnet 72 d and the hysteresis member 71 e is almost zero, the yarn hooking member 72 can rotate substantially freely with respect to the slack eliminating roller 71.

  The upstream guide 73 is disposed slightly upstream of the slack eliminating roller 71. The upstream guide 73 is moved forward and backward by the advance / retreat means 74. When the upstream guide 73 is in the forward position (the state indicated by the broken line in FIG. 3), the spun yarn SY is guided so as not to engage with the yarn hooking member 72 in the yarn slack eliminating device 7. On the other hand, when the upstream guide 73 is in the retracted position (the state indicated by the solid line in FIG. 3), the spun yarn SY is engaged with the yarn hooking member 72 of the yarn slack eliminating device 7 and is wound around the slack eliminating roller 71.

  As shown in FIG. 3 or 5, the winding tension control device 8 includes a yarn path bending guide 81 and a yarn path bending guide displacement device 82 that displaces the yarn path bending guide 81.

  The yarn path bending guide displacement device 82 includes a stepping motor and a linear motion cylinder, and is fixed to the vicinity of the yarn slack eliminating device 7, that is, the bracket 70 in this embodiment. The yarn path bending guide displacement device 82 has a rod 82a that can move forward and backward along the axis of the slack eliminating roller 71 of the yarn slack eliminating device 7.

One end of the yarn path bending guide 81 is attached to the tip of the rod 82 a of the yarn path bending guide displacement device 82. On the other end side of the yarn path bending guide 81, a guide hole 81a (in this embodiment, a round hole) that allows the spun yarn SY that passes from the upstream guide 73 of the yarn slack eliminating device 7 or the slack eliminating roller 71 to the downstream guide 10 to pass therethrough. ) Is provided. The guide hole 81 a is disposed so that the center thereof is on the downstream side of the slack eliminating roller 71 and on the extension line of the shaft of the slack eliminating roller 71.
The guide hole 81a may not be a round hole, and may be a notch, for example. However, since the guided yarn moves in the circumferential direction, it is preferable to provide a hook or the like for preventing the yarn from coming off if it is notched.

  Note that the center of the guide hole 81 a is not necessarily on the extension line of the shaft of the slack eliminating roller 71. However, if the center of the guide hole 81a deviates from the extension line of the shaft of the slack eliminating roller 71, when the spun yarn SY is engaged with the yarn slack eliminating device 7 (state shown by the solid line in FIG. 3), the yarn The bending angle of the yarn changes depending on the rotation position of the hook member 72, and the winding tension slightly varies, but varies depending on the position. Therefore, the center of the guide hole 81a is preferably on the extension line of the shaft of the slack eliminating roller 71.

  When the winding tension needs to be increased, the yarn path bending guide 81 is moved closer to the slack eliminating roller 71 by the retraction of the rod 82a of the yarn path bending guide displacement device 82 (in FIG. 3, the two-dot chain line). State shown). On the other hand, when it is necessary to lower the winding tension, the yarn path bending guide 81 is separated from the slack eliminating roller 71a by the advancement of the rod 82a of the yarn path bending guide displacement device 82 (in the solid line in FIG. 3). State shown).

  Here, when the winding tension needs to be increased, for example, when the spun yarn SY is engaged with the yarn slack eliminating device 7 and is appropriate because the rotational resistance of the yarn hooking member 72 is small. For example, when the winding tension is lower than the proper winding tension. On the contrary, when it is necessary to lower the winding tension, for example, since the rotational resistance of the yarn hooking member 72 with respect to the slack eliminating roller 71 is large, the winding tension is higher than the appropriate winding tension. Time.

  The winding tension is detected by a tension sensor 11 disposed on the downstream side of the downstream guide 10 as shown in FIG. A detection signal from the tension sensor 11 is input to the controller 83. The controller 83 retracts the rod 82a of the yarn path bending guide displacement device 82 when the winding tension detected by the tension sensor 11 is lower than an appropriate value. On the contrary, when the winding tension detected by the tension sensor 11 is higher than an appropriate value, the rod 82a of the yarn path bending guide displacement device 82 is advanced.

When the yarn path bending guide 81 is brought close to the slack eliminating roller 71a (state shown by a two-dot chain line in FIG. 3), the tip of the flyer 72b in the yarn hooking member 72 (the spun yarn SY is not engaged with the flyer 72b). In some cases, the yarn path of the spun yarn SY from the upstream guide 73) to the downstream guide 10 through the guide hole 81a of the yarn path bending guide 81 has a large bending angle (θ _{1 in} FIG. 3). In this case, by having a large bending angle, the resistance to running of the spun yarn SY increases, and as a result, the winding tension increases.

On the contrary, when the yarn path bending guide 81 is separated from the slack eliminating roller 71 (as shown by the solid line in FIG. 3), the tip of the flyer 72b (the upstream guide when the spun yarn SY is not engaged with the flyer 72b). 73), the yarn path of the spun yarn SY going to the downstream guide 10 through the guide hole 81a has a small bending angle (θ _{2 in} FIG. 3). In this case, by having a small bending angle, the resistance to running of the spun yarn SY is lowered, and as a result, the winding tension is lowered.

  The downstream guide 10 is disposed on the downstream side of the winding tension control device 8. The downstream guide 10 guides the spun yarn SY that has passed through the yarn path bending guide 81 of the winding tension control device 8 to the winding device 9 side.

Next, the operation of the spinning machine 1 configured as described above will be described.
Each spinning unit U of the spinning machine 1 draws the fiber bundle Y with the draft device 4 and sends it to the spinning device 5. The spun yarn SY spun from the spinning device 5 is sent downstream by the yarn feeding device 6, passes through the cutter 16 and the yarn clearer 17, and passes through the yarn slack eliminating device 7 and the winding tension control device 8. And finally, it is sent to the winding device 9 and wound up as a package WP.

  When the yarn clearer 17 of any of the spinning units U detects a defect in the spun yarn SY, a unit controller (not shown) of the spun unit U cuts the spun yarn SY with the cutter 16 and substantially simultaneously with the draft device 4 The rotation of the back roller pair 41 and the third roller pair 42 is stopped. The fiber bundle Y is cut so as to be torn between the stopped third roller pair 42 and the middle roller pair 44 that continues to rotate, and the spun yarn SY downstream from the cut portion is sucked and removed by a suction means (not shown). Is done.

  Then, a unit controller (not shown) of the spinning unit U transmits a yarn joining request signal to the yarn joining cart 3. The yarn joining cart 3 moves to a position facing the spinning unit U and stops. Then, the unit controller starts rotation of the slack eliminating roller 71 of the yarn slack eliminating device 7 at an appropriate timing. At the same time, the upstream guide 73 of the yarn slack eliminating device 7 is advanced by the advance / retreat means 74, and the spun yarn SY to be spun next is engaged with the yarn hooking member 72 of the yarn slack eliminating device 7 except when necessary. Hold the yarn path so that it does not.

  Then, when the suction pipe 18 of the yarn splicing carriage 3 is rotated upward, the draft device 4 and the spinning device 5 start to be driven almost in synchronization therewith, and the spun yarn SY spun from the spinning device 5 becomes the suction pipe. 18 so that the suction is captured. At the same time, on the winding device 9 side, the suction mouth 19 of the yarn splicing carriage 3 rotates downward to suck and capture the yarn end wound around the package WP. Then, the suction pipe 18 and the suction mouth 19 guide the respective sucked yarn ends to the yarn joining device 20 to perform yarn joining.

  Then, immediately before the yarn joining operation in the yarn joining device 20 is started, the advance / retreat means 74 in the yarn slack eliminating device 7 moves backward, and the upstream guide 73 is moved to the retracted position. Then, the yarn path of the spun yarn SY is changed so as to overlap with the rotation locus of the flyer 72b as shown by the chain line in FIG. As a result, the spun yarn SY is wound around the outer peripheral surface of the slack eliminating roller 71 by the flyer 72b.

  That is, spinning of the spun yarn SY from the spinning device 5 continues during the yarn splicing operation at the yarn splicing device 20, and in this state, a large amount of spun yarn SY is produced on the upstream side of the yarn splicing device 20. It will stay. The yarn slack eliminating device 7 prevents slack and stay of the spun yarn SY by winding the spun yarn SY around the slack eliminating roller 71 during the yarn splicing operation in the yarn splicing device 20, and smooth yarn splicing operation. And realize spinning resumption work.

  As described above, the yarn hooking member 72 can rotate independently of the slack eliminating roller 71. However, a load (permanent magnet 72d) having a certain size or more is obtained by the mechanism including the permanent magnet 72d and the hysteresis material 71e. As long as a load that overcomes the magnetic coupling between the hysteresis member 71e and the hysteresis member 71e does not act, the yarn hooking member 72 rotates integrally with the slack eliminating roller 71. During the above-described yarn splicing operation, the spun yarn SY stops traveling on the downstream side, and the load applied to the flyer 72b is small. Therefore, the yarn hooking member 72 rotates integrally with the slack eliminating roller 71, and the slack eliminating roller 71 The spun yarn SY is wound around the outer periphery.

  During this time, the yarn path bending guide 81 of the winding tension control device 8 stands by at a predetermined initial position.

  After the end of the yarn joining operation by the yarn joining device 20, the winding device 9 rotates the package WP and resumes the winding of the spun yarn SY.

  When the winding operation by the winding device 9 is resumed, the ratio between the feeding speed of the yarn feeding device 6 and the winding speed of the winding device 9 is set so that an appropriate winding tension is applied to the spun yarn SY. Is set. Therefore, after the rewinding is resumed, the yarn speed drawn from the slack eliminating roller 71 is higher than the yarn speed wound around the slack eliminating roller 71. Accordingly, the flyer 72b of the yarn hooking member 72 rotates independently of the slack eliminating roller 71 that continues to rotate in the winding direction, and the spun yarn SY that has been wound and stored by the slack eliminating roller 71 is stored. Will be gradually solved.

  When the slack eliminating roller 71 is unwound, the flyer 72b prevents the spun yarn SY from coming off and guides the spun yarn SY to be unwound from the slack eliminating roller 71 on average. Further, the flyer 72b provides an appropriate resistance by contacting with the spun yarn SY so as to optimize the winding tension so that the yarn is suitably wound around the package WP.

  If the winding tension detected by the tension sensor 11 is appropriate during the winding operation, the controller 83 keeps the yarn path bending guide 81 in the initial position. When the winding tension detected by the tension sensor 11 is lower than an appropriate value, the controller 83 retracts the rod 82a of the yarn path bending guide displacement device 82 to increase the bending angle of the thread path, thereby winding the winding path. Optimize the tension. On the other hand, when the winding tension detected by the tension sensor 11 is higher than an appropriate value, the rod 82a of the yarn path bending guide displacement device 82 is advanced, the bending angle of the thread path is reduced, and the winding tension is reduced. Optimize.

  According to the spinning machine 1 configured as described above, during winding of the spun yarn SY, the yarn path bending guide 81 of the winding tension control device 8 is appropriately set with respect to the slack eliminating roller 71 of the yarn slack eliminating device 7. Can be approached or separated. As a result, the bending angle of the yarn path of the spun yarn SY from the tip of the flyer 72b in the yarn hooking member 72 to the downstream guide 10 through the guide hole 81a of the yarn path bending guide 81 is adjusted, and the winding tension is adjusted. . That is, according to the spinning machine 1 provided with the winding tension control device 8 of the present invention, the winding tension can be appropriately adjusted during winding.

  Further, according to the spinning machine 1 described above, based on the winding tension detected by the tension sensor 11, the controller 83 automatically displaces the yarn path bending guide 81 to adjust the winding tension. Therefore, in a spinning machine with multiple spindle units arranged side by side, even if the rotational resistance of the yarn slack eliminating device varies between each spindle, the rotational resistance is adjusted manually for each spindle. There is no need to do.

  Further, according to the spinning machine 1 described above, the center of the guide hole 81a exists on the extension line of the shaft of the slack eliminating roller 71a. That is, even if the yarn hooking member 72 rotates and the position of the flyer 72b changes, the distance between the flyer 72b and the guide hole 81a is kept constant. Therefore, when the position of the flyer 72b changes, the bending angle of the yarn path does not change and the winding tension does not change.

  As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to this.

For example, as shown in FIG. 6, a winding diameter detecting means 13 for detecting the winding diameter of the package WP may be further provided, and the yarn path bending guide 81 may be displaced based on a signal from the winding diameter detecting means 13. Good.
That is, when forming the package WP in the winding device 9, the winding tension is increased while the winding diameter is small, and the winding tension is decreased as the winding diameter increases, so that a clean package shape can be obtained. .
The winding diameter detecting means 13 may measure the rotational speed of the package WP and calculate the winding diameter of the package WP from this rotational speed. It's okay.

It is a schematic front view which shows an example of the spinning machine to which the winding tension control apparatus of this invention was applied. It is a schematic side view of the spinning machine of FIG. FIG. 2 is a side sectional view of a main part showing a yarn slack eliminating device and a winding tension control device in the spinning machine of FIG. 1. FIG. 4 is a side cross-sectional view of a main part showing a state in which an adjustment bolt is rotated and moved from the state of FIG. 3. FIG. 2 is a perspective view showing a yarn slack eliminating device and a winding tension control device in the spinning machine of FIG. 1. It is a schematic side view of the spinning machine concerning a modification.

Explanation of symbols

SY Spinned yarn 7 Yarn slack removal device 8 Winding tension control device 70 Bracket 71 Slack removal roller 71a Loosening roller main body 71b Nut member 71c Adjustment bolt 71d Bearing 71e Hysteresis material 71f Fixing screw 72 Yarn hooking member 72a Shaft 72b Flyer 72c Enlargement Diameter portion 72d Permanent magnet 73 Upstream guide 75 Rotation drive source 75a Rotating shaft 81 Yarn path bending guide 81a Guide hole 82 Yarn path bending guide displacement device 82a Rod

Claims (5)

A spinning device that spins a yarn from a fiber bundle, a winding device that winds the spun yarn around a package, and a yarn between the spinning device and the winding device is wound around a loosening roller to loosen the yarn. A winding tension control device that is incorporated in a spinning machine having a yarn slack eliminating device that absorbs the yarn and controls the winding tension,
A yarn path bending guide that is arranged near and on the downstream side of the slack eliminating roller, and guides the yarn path of the yarn from the yarn slack eliminating device toward the winding device while bending the yarn path;
When the winding tension is to be increased, the yarn path bending guide is moved closer to the slack eliminating roller to increase the bending angle, while when the winding tension is to be decreased, the thread path bending guide is A yarn path bending guide displacement device that reduces the angle of bending by separating from the slack eliminating roller;
A winding tension control device comprising: The winding tension control device according to claim 1, wherein the yarn path bending guide guides the yarn through a guide hole through which the yarn passes. The winding according to claim 2, wherein the yarn path bending guide displacement device displaces the yarn path bending guide so that the center of the guide hole is displaced on an extension line of the shaft of the slack eliminating roller. A tension control device. The yarn path bending guide displacement device is configured to displace the yarn path bending guide based on a signal from a tension detection unit that detects a tension of a yarn from the yarn slack eliminating device toward the winding device. The winding tension control device according to any one of claims 1 to 3. 2. The yarn path bending guide displacement device is further configured to displace the yarn path bending guide based on a signal from a winding diameter detecting means for detecting a winding diameter of the package. The winding tension control device according to any one of 4.

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