JP2006306588A - Yarn sag removing device in textile machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yarn sag removing device in a textile machine capable of forming a package having the consistent quality by realizing the consistent rotational resistance of a tightening roller of a threading member. <P>SOLUTION: The yarn sag removing device 12 comprises a yarn-tightening roller 21 which is rotated while a spinning yarn 10 is wound around an outer circumferential surface and stored thereon, and a threading member 22 which is mounted on the yarn-tightening roller 21 in a concentric and relatively rotatable manner thereto. A columnar part 35 to match its axis with the axis of rotation is provided on a flyer shaft 33 of the threading member 22, a permanent magnet 36 is provided on an outer circumferential surface of the columnar part 35, and a hysteresis material 37 is provided in a facing manner in the radial direction. A cylindrical adjustment bolt 32 with the hysteresis material 37 installed thereon is screwed to a nut member 31 fixed to the yarn-tightening roller 21 side, and the facing area of the permanent magnet 36 and the hysteresis material 37 can be changed by rotating the adjustment bolt. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a yarn slack eliminating device for removing yarn slack generated between a spinning device and a winding device in a textile machine such as a spinning machine.

  Conventionally, in a high-speed spinning machine such as a pneumatic spinning machine that winds up a spun yarn to form a package, when a yarn defect is detected, the yarn defect portion is cut and removed by a cutter and then removed from the spinning device. The leading end of the yarns sent one after the other and the yarn end on the package side are spliced by a yarn splicing device. Since the above-described yarn joining operation is performed in a state where the winding of the yarn is stopped, it is necessary to remove the slack of the yarn.

In view of this point, Patent Document 1 discloses a slack eliminating device including a slack eliminating roller that is rotationally driven and a rotary thread hooking member. In this slack eliminating device, the yarn hooking member is attached to the slack removing roller concentrically and in relative rotation, and against the relative rotation, the pressing force of the transmission force applying member (which is a biasing means such as a spring) ( The frictional force) can provide an appropriate resistance. Further, the pressing force (frictional force) can be adjusted steplessly by a tightening operation of a transmission force adjusting operation portion having a screwing portion.
Japanese Patent Laying-Open No. 2004-277946 (FIG. 18, paragraph numbers 0024 to 0026)

  However, since the configuration of Patent Document 1 realizes the relative rotational resistance of the yarn hooking member by the pressing force (friction force) of the transmission force applying member, unintentional factors such as scratches on the friction surface, Or, there are many cases where the relative rotational resistance cannot be stably obtained due to factors such as wear of the friction surface over time.

  Here, when the yarn is unwound from the slack eliminating roller, the relative rotational resistance is one element that determines the yarn winding tension, and an appropriate winding tension depends on the yarn type and the yarn thickness. If it cannot be obtained stably, the shape of the package and the unwinding property of the yarn in the subsequent process will be adversely affected. Therefore, the slack eliminating device having the configuration of Patent Document 1 still has room for improvement from the viewpoint of stably obtaining a good quality package.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a yarn slack device that can realize a stable rotation resistance of the yarn hooking member with respect to the slack eliminating roller and can form a stable package. It is in.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  ◆ According to the first aspect of the present invention, there is provided a yarn slack eliminating device in a textile machine configured as follows. A slack eliminating roller that is driven to rotate, and a thread hooking member that is concentrically attached to the slack eliminating roller so as to be relatively rotatable. One of the slack eliminating roller and the yarn hooking member is provided with a permanent magnet, and the other is provided with a hysteresis material.

  The phrase “provided with a permanent magnet” includes not only providing the slack removing roller or the thread hanging member with a permanent magnet, but also including the case where the slack removing roller itself or the thread hanging member itself is magnetized to be a permanent magnet.

  As a result, the stability and reliability of the rotational resistance over time can be improved, and a good shape of the formed package can be stably obtained. In particular, it is possible to stably obtain a small rotational resistance capable of imparting an appropriate unwinding tension to the yarn unwound from the slack eliminating roller, and it is very suitable for the field of textile machinery.

  The thread slack eliminating device in the textile machine is preferably configured as follows. The yarn hooking member includes a cylindrical portion whose axis is aligned with the axis of rotation. One of the permanent magnet and the hysteresis material is disposed on the outer peripheral surface of the cylindrical portion, and the other of the permanent magnet and the hysteresis material is disposed so as to face the radial direction.

  Thereby, since the part which provides rotational resistance can be accommodated in a small space, a slack eliminating apparatus can be comprised compactly. Further, by configuring the permanent magnet or the hysteresis material installation portion of the yarn hooking member in a cylindrical shape concentric with the rotation axis, the moment of inertia of the yarn hooking member can be reduced, and the fluctuation of the yarn drawing speed can be reduced. Can be made to follow well.

  In the yarn slack eliminating device in the textile machine, the permanent magnet and the hysteresis material are configured to be relatively movable in the axial direction, and the opposing area of the permanent magnet and the hysteresis material is determined by this relative movement. It is preferable that it can be changed.

  Thereby, since the magnetic coupling strength between the permanent magnet and the hysteresis material can be changed, a configuration that can flexibly cope with changes in the thread type and thread thickness can be obtained.

  The thread slack eliminating device in the textile machine is preferably configured as follows. A cylindrical member is provided on the outer peripheral side of the cylindrical portion, and the permanent magnet or the hysteresis material is disposed on the inner peripheral surface of the cylindrical member. A screw portion is formed between the cylindrical member and the slack eliminating roller, and the cylindrical member is screwed in the axial direction by rotating the cylindrical member with respect to the slack eliminating roller. Is configured to be possible.

  Thereby, the rotational resistance of the yarn hooking member can be easily changed by rotating the cylindrical member. Further, the position of the cylindrical member can be easily finely adjusted by screw movement by the threaded portion, which is suitable for fine adjustment of the rotational resistance of the yarn hooking member.

  ◆ According to a second aspect of the present invention, there is provided a textile machine including the yarn slack eliminating device having the above-described configuration.

  As a result, the unwinding tension from the slack eliminating roller can be made stable with high reliability over a long period of time, and the quality of the package formed can be improved.

  Next, a spinning machine as a textile machine according to an embodiment of the present invention will be described with reference to the drawings. In this specification, “upstream / downstream” refers to upstream / downstream with reference to the traveling direction of the yarn during spinning. FIG. 1 is a front view showing the overall configuration of a spinning machine to which the slack eliminating device of the present invention is applied, and FIG. 2 is a longitudinal side view of the spinning machine.

  FIG. 1 shows a spinning machine 1 having a large number of spinning units 2 arranged side by side. The spinning machine 1 is equipped with a yarn splicing cart 3, a blower box 4, and a prime mover box 5 that are provided so as to be able to run in the direction in which the spinning units 2 are arranged.

  As shown in FIG. 1, each spinning unit 2 includes, in order from upstream to downstream, a draft device 7, a spinning device 9, a yarn feeding device 11, a slack eliminating device 12, and a winding device 13. It has as a main configuration. The draft device 7 is provided in the vicinity of the upper end of the casing 6 of the spinning machine 1, and the fiber bundle 8 sent from the draft device 7 is spun by the spinning device 9. The spun yarn 10 discharged from the spinning device 9 is fed by the yarn feeding device 11, passes through a yarn clearer 52 described later, and then wound by the winding device 13 to form a package 45.

  As shown in FIG. 2, the draft device 7 is for stretching the sliver 15 into a fiber bundle 8, and includes, for example, a back roller 16, a third roller 17, a middle roller 19 on which an apron belt 18 is mounted, and a front roller The roller 20 is composed of four rollers.

  Although a detailed configuration of the spinning device 9 is not illustrated, in this embodiment, a pneumatic type that generates the spun yarn 10 from the fiber bundle 8 using a swirling airflow is adopted.

  The yarn feeding device 11 includes a delivery roller 39 supported by the casing 6 of the spinning machine 1 and a nip roller 40 provided in contact with the delivery roller 39. With this configuration, the spun yarn 10 discharged from the spinning device 9 is sandwiched between the delivery roller 39 and the nip roller 40, and the delivery roller 39 is rotated by an electric motor (not shown), so that the spun yarn 10 is moved to the winding device 13 side. To send.

  The winding device 13 includes a cradle arm 71 pivotally supported around a support shaft 70, and the cradle arm 71 can rotatably support a bobbin around which the spun yarn 10 is wound. . Further, the winding device 13 includes a winding drum 72 that can be driven in contact with a peripheral surface of a package 45 formed by winding the bobbin and the spun yarn 10 thereon, and a traverse device (not shown). When the winding drum 72 is driven by an electric motor (not shown), the package 45 in contact therewith is rotated to wind the spun yarn 10.

  A yarn clearer 52 is provided on the front side of the casing 6 of the spinning machine 1 and slightly downstream of the yarn feeder 11. The spun yarn 10 spun by the spinning device 9 passes through the yarn clearer 52 before being wound by the winding device 13. The yarn clearer 52 monitors the thickness of the traveling spun yarn 10 and, when a yarn defect of the spun yarn 10 is detected, transmits a yarn defect detection signal to a unit controller (not shown).

  Upon receipt of the yarn defect detection signal, the unit controller immediately cuts the yarn with the cutter 57, further stops the draft device 7, the spinning device 9 and the like, and is self-propelled to the yarn joining carriage 3 until the spinning unit 2 is reached. Let Thereafter, the spinning device 9 and the like are driven again, and the yarn joining cart 3 is spliced to resume spinning and winding.

  As shown in FIG. 1, the yarn joining cart 3 is provided so as to run on a rail 41 provided in the casing 6 of the spinning machine 1 body. The carriage 3 is provided with a yarn splicing device (for example, a splicer) 43 and the carriage 3 so as to be able to be lifted and lowered. While turning around an axis, the yarn end discharged from the spinning device 9 is sucked and captured to obtain the yarn. A suction pipe 44 that guides to the splicing device 43 and a bogie 3 are provided so as to be able to be lifted and lowered, and the yarn end is sucked and captured from a package 45 rotatably supported by the winding device 13 while turning around the shaft. And a suction mouse 46 for guiding the joint device 43.

  The slack eliminating device 12 provided in each of the plurality of spinning units 2 is configured to be able to engage with the spun yarn 10 or not to engage with it.

  Specifically, as shown in FIG. 3, the slack eliminating device 12 includes a slack eliminating roller 21 for winding and storing the spun yarn 10 around its outer periphery, and a slack eliminating roller 21 integrally or independently depending on conditions. Then, the thread catching member 22 that rotates concentrically, the upstream guide 23 disposed slightly upstream of the slack eliminating roller 21, the air cylinder (advancing / retracting means) 24 that drives the upstream guide back and forth, and the slack eliminating roller 21 are provided. An electric motor (drive means) 25 for driving and a downstream guide 26 provided on the downstream side of the slack eliminating roller 21 are provided as main components.

  The slack eliminating roller 21, the upstream guide 23, the air cylinder 24, the electric motor 25, the downstream guide 26 and the like are supported by the spinning unit 2 via a fixing member such as a bracket 27.

  As shown in the enlarged view of FIG. 4, the slack eliminating roller 21 includes a roller body 42 and a nut member 31 that is integrally fixed to the roller body 42 as main components. The outer peripheral surface 42a of the roller body 42 has a tapered portion a, a cylindrical portion b, and a tapered portion from the proximal end toward the distal end when the side having the yarn hooking member 22 is the distal end and the side connected to the electric motor 25 is the proximal end. It is comprised so that it may become the part c. The taper portions a and c are formed in a gentle taper shape with the end face side being the larger diameter side. The cylindrical part b is formed in a shape having a substantially uniform diameter, and has a shape that is continuous with respect to the tapered parts a and c on both sides.

  The roller body 42 is fixed to the motor shaft 25 a of the electric motor 25 by an appropriate fixing screw 28 screwed into the roller body 42 in the radial direction.

  The slack eliminating device 12 has an outer peripheral surface of the slack eliminating roller 21 (roller main body 42) from the base end side of the spun yarn 10 from the spinning device 9 by the yarn hooking member 22 during the yarn splicing operation by the yarn splicing carriage 3. It is configured to wrap around 42a. After the yarn splicing operation is completed, the spun yarn 10 wound and stored around the outer peripheral surface 42a is unwound from the tip side toward the winding device 13 via the yarn hooking member 22. Has been.

  On the outer peripheral surface 42a of the roller body 42, the taper portion a on the proximal end side smoothly moves the supplied spun yarn 10 from the large diameter portion toward the small diameter portion to reach the intermediate cylindrical portion b. Thus, the spun yarn 10 is configured to be regularly wound around the surface of the cylindrical portion b. The taper portion c on the tip side prevents the loop-out phenomenon in which the wound spun yarn 10 comes off at the same time during unwinding, and at the same time, the spun yarn 10 is removed from the small diameter portion to the large diameter portion on the end surface side. It has a function of rewinding to the forward feed and ensuring a smooth drawing of the spun yarn 10.

  As shown in FIGS. 3 and 4, the yarn hooking member 22 disposed on the leading end side of the slack eliminating roller 21 is configured so as to be concentrically rotatable with respect to the slack eliminating roller 21. Specifically, the yarn hooking member 22 includes a flyer shaft 33 that is supported so as to be relatively rotatable, and a fryer 38 that is fixed to the tip thereof.

  The attachment structure of the yarn hooking member 22 will be described in detail with reference to FIG. A concave portion 42b is formed on the tip end side of the roller body 42 of the slack eliminating roller 21, and a nut member 31 whose axial center coincides with the roller main body 42 is inserted into the concave portion 42b. It is fixed integrally by the method.

  An adjusting bolt 32 is screwed onto the nut member 31 from the front end surface side of the roller body 42. The adjustment bolt 32 is formed in a shape having a penetrating cylindrical hole, and its head has a known hexagonal shape. A screw portion 29 is formed between the shaft portion of the adjustment bolt 32 and the nut member 31.

  A flyer shaft 33 is inserted into the cylindrical hole of the nut member 31, and the flyer shaft 33 is rotatable with respect to the inner peripheral surfaces of the nut member 31 and the adjustment bolt 32 via bearings 34 and 34. It is supported by. The front end of the flyer shaft 33 protrudes from the front end surface of the adjustment bolt 32 and the slack eliminating roller 21, and a flyer 38 is fixed to the front end.

  The flyer 38 is configured to rotate integrally with the flyer shaft 33, and engages with the spun yarn 10 (hangs the spun yarn 10), so that the spun yarn 10 is placed on the outer peripheral surface 42 a of the roller body 42. In order to ensure winding, the shape of the roller body 42 is appropriately curved from the peripheral edge of the front end surface toward the outer peripheral surface 42a.

  The flyer shaft 33 includes a columnar portion 35 having a slightly large diameter in the middle in the axial direction. The outer peripheral surface of the columnar portion 35 has a diameter relative to the inner peripheral surface of the adjustment bolt 32. It is possible to meet in the direction. In addition, it is preferable to make the diameter of the cylindrical portion 35 as small as possible from the viewpoint of satisfactorily following the fluctuation of the drawing speed of the yarn.

  And the permanent magnet 36 is arrange | positioned at the outer peripheral surface of the said cylindrical part 35, and this permanent magnet 36 is alternately magnetized with the N pole, S pole, N pole, S pole, ... in the circumferential direction. Has been. On the other hand, a hysteresis material (semi-hard magnetic material) 37 is disposed on the inner peripheral surface of the adjusting bolt 32.

  The permanent magnet 36 and the hysteresis member 37 face each other in the radial direction with an appropriate cylindrical gap (that is, in a non-contact manner). Further, when changing the thread type and thread thickness, the head of the adjusting bolt 32 is grasped by hand (or is rotated using an appropriate tool) and screwed with respect to the nut member 31 so that the flyer shaft 33 By moving the adjustment bolt 32 in the axial direction with respect to the cylindrical portion 35, the hysteresis material 37 can be moved relative to the permanent magnet 36, and the opposing area of both 37 and 36 can be changed. Yes. In addition, the state which moved the hysteresis material 37 with the adjustment volt | bolt 32 from the state of FIG. 4 is shown by FIG.

  By changing the facing area between the permanent magnet 36 and the hysteresis member 37 as described above, the magnitude of the rotational resistance of the fryer 38 with respect to the slack eliminating roller 21 can be adjusted steplessly. That is, when the permanent magnet 36 and the hysteresis member 37 are opposed to each other with a large area as shown in FIG. 4, the degree of magnetic coupling between the permanent magnet 36 and the hysteresis member 37 is strong, so that the flyer 38 and the slack eliminating roller A strong resistance against the relative rotation with 21 is generated. On the other hand, as shown in FIG. 5, when the facing area between the permanent magnet 36 and the hysteresis member 37 is almost zero, the fryer 38 can rotate with respect to the slack eliminating roller 21 almost free. Thus, in this embodiment, the magnitude of the relative rotational resistance of the flyer 38 with respect to the slack eliminating roller 21 can be freely adjusted by rotating the adjustment bolt 32 and moving it in the axial direction.

  The upstream guide 23 is configured to be driven forward and backward by an air cylinder 24. When the upstream guide 23 is in the forward position (the position indicated by the solid line in FIG. 3), the yarn path is held by the upstream guide 23 so that the spun yarn 10 does not engage with the slack eliminating device 12. The On the other hand, when the upstream guide 23 is in the retracted position (the position of the chain line in FIG. 3), the yarn path is moved to a position where the spun yarn 10 engages with the slack eliminating device 12 and is wound around the slack eliminating roller 21. It is configured to let you.

  Next, the operation of the spinning machine 1 configured as described above will be described below. Each spinning unit 2 of the spinning machine 1 sends the fiber bundle 8 to the spinning device 9 by the draft device 7. The spun yarn 10 spun and generated in the spinning device 9 is fed downstream by the yarn feeding device 11, passes through the cutter 57 and the yarn clearer 52, and finally passes through the slack eliminating device 12. Is sent to the winding device 13 and wound as a package 45.

  When the yarn clearer 52 of any spinning unit 2 detects a defect in the spun yarn 10, a unit controller (not shown) of the spun unit 2 cuts the spun yarn 10 with the cutter 57 and almost simultaneously with the draft device 7. The rotation of the back roller 16 and the third roller 17 is stopped. The fiber bundle 8 is cut so as to be torn between the stopped third roller 17 and the middle roller 19 that continues to rotate, and the spun yarn 10 at a portion downstream from the cut portion is sucked and removed by a suction means (not shown). .

  Then, the unit controller of the spinning unit 2 transmits a yarn joining request signal to the yarn joining carriage 3, and the yarn joining carriage 3 moves to a position facing the spinning unit 2 and stops. Then, the unit controller starts rotation of the slack eliminating roller 21 of the slack eliminating device 12 at an appropriate timing. At the same time, the upstream guide 23 of the slack eliminating device 12 is advanced by the air cylinder 24, and the spun yarn 10 to be spun next is engaged with the yarn hooking member 22 of the slack eliminating device 12 except when necessary. Hold the yarn path so that there is no.

  Then, when the suction pipe 44 of the yarn splicing carriage 3 is rotated upward, the draft device 7 and the spinning device 9 start to be driven almost in synchronism with this, and the spun yarn 10 spun from the spinning device 9 The pipe 44 is sucked and captured. At the same time, on the winding device 13 side, the suction mouth 46 of the yarn splicing carriage 3 rotates downward, and the yarn end wound around the package 45 is sucked and captured. The suction pipe 44 and the suction mouth 46 guide the respective sucked yarn ends to the yarn joining device 43 to perform yarn joining.

  Then, immediately before the yarn joining operation at the yarn joining device 43 is started, the air cylinder 24 is retracted in the slack eliminating device 12, and the upstream guide 23 is moved to the retracted position. Then, the yarn path of the spun yarn 10 is changed so as to overlap the rotation trajectory of the fryer 38 as shown by the chain line in FIG. As a result, the spun yarn 10 is wound around the outer peripheral surface 42 a of the slack eliminating roller 21 by the flyer 38.

  That is, spinning of the spun yarn 10 from the spinning device 9 continues during the yarn splicing operation at the yarn splicing device 43, and in this state, a large amount of spun yarn 10 stays on the upstream side of the yarn splicing device 43. Resulting in. The slack eliminating device 12 prevents the slack yarn 10 from slacking and staying by winding the spun yarn 10 around the slack eliminating roller 21 during the yarn splicing operation of the yarn splicing device 43, thereby enabling smooth yarn splicing operation and This is to realize the spinning resumption work.

  As described above, the flyer 38 and the flyer shaft 33 can rotate independently of the slack eliminating roller 21, but a load (permanent magnet) having a certain size or more is achieved by the mechanism including the permanent magnet 36 and the hysteresis material 37. The flyer 38 rotates integrally with the slack eliminating roller 21 unless a load that overcomes the magnetic coupling between the hysteresis member 37 and the hysteresis member 37 acts. During the yarn splicing operation described above, the spun yarn 10 is stopped at the downstream side, and the load applied to the fryer 38 is small. Therefore, the fryer 38 rotates integrally with the slack eliminating roller 21, and the spun yarn 10 is arranged on the outer periphery of the slack eliminating roller 21. Will be wrapped.

  After completion of the yarn joining operation by the yarn joining device 43, the package 45 is rotated by the winding drum 72 in the winding device 13, and the winding of the spun yarn 10 is resumed.

  As described above, the spun yarn 10 spun from the spinning device 9 is rotated by the slack eliminating roller 21 that continues to rotate from the start of the yarn joining operation by the yarn joining device 43 to the resumption of winding. It is wound around the outer peripheral surface 42a. However, when the winding operation by the winding device 13 is resumed, the ratio between the feeding speed of the yarn feeding device 11 and the winding speed of the winding device 13 is set so that an appropriate tension is applied to the spun yarn 10. Therefore, the yarn speed drawn from the slack eliminating roller 21 is higher than the yarn speed wound around the slack eliminating roller 21. Accordingly, the flyer 38 of the slack eliminating device 12 rotates independently of the slack eliminating roller 21 that continues to rotate in the winding direction, and the spun yarn 10 wound around the slack eliminating roller 21 and stored. Will be gradually solved.

  When the slack eliminating roller 21 is unwound, the flyer 38 prevents the spun yarn 10 from slipping out, guides the spun yarn 10 to be unwound from the slack eliminating roller 21 on average, and spun yarn. 10, an appropriate resistance is imparted to optimize the yarn tension so that the yarn is suitably wound on the package 45.

  That is, the flyer 38 of this embodiment has a yarn hooking function for introducing the spun yarn 10 into the slack eliminating roller 21 immediately before the start of the yarn splicing operation in the yarn splicing device 43, and the spun yarn 10 wound around the slack eliminating roller 21. In unwinding, it has a function of applying a predetermined unwinding tension. In the present embodiment, the above-described unwinding tension imparts a resistance based on the magnetic coupling between the permanent magnet 36 and the hysteresis member 37 to the relative rotation of the flyer shaft 33 (flyer 38) with respect to the slack eliminating roller 21. Is done.

  As described above, since the relative rotational resistance of the fryer 38 with respect to the slack eliminating roller 21 is imparted by non-contact magnetic coupling, the stability and reliability of the rotational resistance over time can be improved, and winding can be performed. A good shape of the package 45 formed by the device 13 can be stably obtained.

  That is, in the configuration of the slack eliminating device of Patent Document 1, since the relative rotational resistance of the thread hanging body is realized by the pressing force (frictional force) of the transmission force applying member, the stability of the frictional force can be satisfied. Instead, irregular fluctuations in the rotational resistance occur frequently, and the rotational resistance frequently changes with long-term use.

  In particular, in the field of textile machinery that winds a yarn to form a package, the rotational resistance of the yarn hooking member 22 (flyer 38) required to impart an appropriate unwinding tension (winding tension) to the yarn is considerable. It is supposed to be small. Therefore, the adverse effect of the fluctuation of the rotational resistance as described above is great, and the package quality is deteriorated, for example, the end face is dropped or a step is formed on the end face only by slightly changing the frictional state of the transmission force applying member. I was allowed to.

  In this respect, the slack eliminating device 12 of the present embodiment is configured to apply the rotational resistance of the fryer 38 in a non-contact manner, and thus can provide a relatively small rotational resistance as described above. As a result, the tension during unwinding of the spun yarn 10 from the slack eliminating roller 21 can be satisfactorily stabilized, and the quality of the package 45 can be significantly improved.

  Further, in the slack eliminating device 12 of the present embodiment, the flyer shaft 33 of the yarn hooking member 22 is provided with a columnar portion 35 whose axis coincides with the rotational axis. And the permanent magnet 36 is arrange | positioned on the outer peripheral surface of the column-shaped part 35, and the hysteresis material 37 is arrange | positioned so that this permanent magnet 36 may be opposed to radial direction. Therefore, since the part which provides rotational resistance can be accommodated in a small space, the slack eliminating apparatus 12 can be comprised compactly. Further, by configuring the installation portion of the permanent magnet 36 of the yarn hooking member 22 in a cylindrical shape concentric with the rotation axis, the moment of inertia of the yarn hooking member 22 can be reduced, and the drawing speed of the spun yarn 10 can be reduced. It is possible to follow the fluctuation well.

  In addition, as is clear from the comparison between FIG. 4 and FIG. 5, in the present embodiment, the permanent magnet 36 and the hysteresis member 37 are configured to be relatively movable in the axial direction. The opposing area between the magnet 36 and the hysteresis member 37 can be changed. Therefore, by changing the degree of magnetic coupling between the permanent magnet 36 and the hysteresis member 37, the rotational resistance of the yarn hooking member 22 (flyer 38) can be freely changed, and the yarn type and the yarn thickness. It can be set as the structure which can respond flexibly to the change of.

  In the present embodiment, a cylindrical adjustment bolt 32 is provided so as to cover the outer peripheral side of the columnar portion 35, and the hysteresis material 37 is disposed on the inner peripheral surface of the adjustment bolt 32. Further, a screw portion 29 is formed between the adjustment bolt 32 and the nut member 31 on the slack eliminating roller 21 side, and the adjustment bolt 32 is rotated by rotating the adjustment bolt 32 with respect to the slack eliminating roller 21. The screw can be moved in the axial direction. Thereby, the rotational resistance of the yarn hooking member 22 can be easily changed by rotating the adjusting bolt 32. Further, since the screw portion 29 is configured, fine adjustment of the adjustment bolt 32 is easy, and fine adjustment of the rotational resistance of the yarn hooking member 22 (flyer 38) is also easy.

  Although the preferred embodiment of the present invention has been described above, the above embodiment can be modified as follows, for example.

  (1) Regarding the permanent magnet 36, a cylindrical permanent magnet may be externally fitted and fixed to the cylindrical portion 35, or the outer peripheral surface of the cylindrical portion 35 may be directly magnetized to constitute a permanent magnet. Also good.

  (2) The permanent magnet 36 and the hysteresis material 37 may be arranged in reverse. That is, the permanent magnet may be disposed on the inner peripheral surface side of the adjustment bolt 32 and the hysteresis material may be disposed on the outer peripheral surface of the columnar portion 35 of the flyer shaft 33. Moreover, the layout which arrange | positions a permanent magnet and a hysteresis material so that it may oppose to an axial direction may be sufficient by comprising a disk-shaped part in the middle of the flyer axis | shaft 33, for example.

  (3) Although the cheese package 45 wound around the straight bobbin is illustrated in FIG. 1, the above-described slack eliminating device 12 can be applied even when forming a cone-shaped package in which a yarn is wound around a corn bobbin. it can. In the case of a cone-shaped package, the winding speed periodically varies with the traverse device traversing the winding device 13, but the slack eliminating device 12 includes a permanent magnet and a hysteresis material. By adopting the above-described configuration, it is possible to follow the fluctuation in the winding speed well and stably.

  (4) The specific configuration of the slack eliminating roller 21 is not limited to the above. For example, the roller body 42 and the nut member 31 may be configured as an integral member. Further, the method of fixing the roller body 42 to the motor shaft 25a is not limited to using the fixing screw 28.

  (5) In this embodiment, the columnar portion 35 is a solid columnar shape, but may be a hollow columnar shape to reduce the moment of inertia.

  (6) In the above embodiment, the slack eliminating device 12 is installed in the spinning machine 1, but the present invention is not limited to this, and can be applied to general textile machines including a yarn splicing device and the like. .

The front view which showed the whole structure of the spinning machine to which the slack eliminating apparatus of this invention was applied. Fig. 3 is a longitudinal side view of the spinning machine. The partial cross section side view which shows the whole slack removal apparatus structure. The cross-sectional enlarged view which shows the structure of a slack removal roller and a thread hook member. The cross-sectional enlarged view which shows a mode that the adjustment bolt was rotated and moved from the state of FIG.

Explanation of symbols

1 Spinning machine (textile machine)
DESCRIPTION OF SYMBOLS 2 Spinning unit 12 Slack removal apparatus 21 Slack removal roller 22 Thread hook member 29 Screw part 31 Nut member 32 Adjustment bolt 33 Flyer shaft 36 Permanent magnet 37 Hysteresis material 38 Flyer

Claims (5)

A slack eliminating roller that is driven to rotate;
A thread hooking member that is concentrically attached to the slack eliminating roller and is relatively rotatable.
A yarn slack eliminating device in a textile machine, wherein either one of the slack eliminating roller and the yarn hooking member is provided with a permanent magnet and the other is provided with a hysteresis material. The yarn slack eliminating device according to claim 1,
The yarn hooking member includes a columnar portion whose axis of rotation coincides with the axis,
Either one of the permanent magnet and the hysteresis material is disposed on the outer peripheral surface of the cylindrical portion, and either the permanent magnet or the hysteresis material is disposed so as to face the radial direction thereof. A yarn slack eliminating device in a textile machine. The yarn slack eliminating device according to claim 2,
The permanent magnet and the hysteresis material are configured to be relatively movable in the axial direction, and the opposing area of the permanent magnet and the hysteresis material can be changed by the relative movement. Thread loosening device in textile machinery. The yarn slack eliminating device according to claim 3,
A cylindrical member is provided on the outer peripheral side of the cylindrical portion, and the permanent magnet or the hysteresis material is disposed on the inner peripheral surface of the cylindrical member,
A screw portion is formed between the cylindrical member and the slack eliminating roller, and the cylindrical member is screwed in the axial direction by rotating the cylindrical member with respect to the slack eliminating roller. A yarn slack eliminating device in a textile machine, characterized in that A textile machine comprising the yarn slack eliminating device according to any one of claims 1 to 4.

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