JP5804306B2 - Yarn storage device and yarn winding machine - Google Patents

Description

  The present invention relates to a yarn accumulating device provided in a yarn winding machine. Specifically, the present invention relates to a mechanism for applying tension to a yarn unwound from the yarn storage device.

  In a yarn winding machine such as a spinning machine, a yarn storage device is known that winds a yarn around a rotating yarn storage roller and temporarily stores the yarn.

  In this type of yarn storage device, the yarn wound around the yarn storage roller is unwound by pulling out the yarn along an extension line of the axis of the yarn storage roller. By the way, since the yarn stored in the yarn storage roller is spirally wound around the outer peripheral surface of the yarn storage roller, the yarn drawn from the yarn storage roller is unwound while being swung around the yarn storage roller. Will be. At this time, the locus of the yarn to be unwound may bulge outward due to centrifugal force, and the yarn may be unwound in an unstable manner due to excessive swinging of the yarn. A portion where the trajectory of the yarn unwound as described above swells is called a balloon.

  In such a yarn accumulating device, when the yarn is pulled out from the yarn accumulating roller, it is ideal that the yarn wound spirally is unwound in order from the end side. However, when the force required to pull out the yarn from the yarn accumulating roller is extremely small (the resistance when pulling out the yarn is small), the yarn on the yarn accumulating device is pulled slightly, and the momentum causes the yarn to clump. In some cases, the yarn storage roller may come off at once. Such a phenomenon that the yarns become a lump and comes off at once is called sluffing.

  In this regard, the yarn accumulating device (yarn slack eliminating device) included in the spinning machine disclosed in Patent Document 1 has a flyer that rotates relative to the yarn accumulating roller while being engaged with the yarn. Since this flyer is configured to generate torque in a direction against the relative rotation, the yarn unwound from the yarn accumulating roller while being engaged with the flyer is prevented from being excessively swung. it can. Thereby, generation | occurrence | production of a balloon can be suppressed and the unwinding of a thread | yarn can be stabilized.

  Further, in the case of the configuration disclosed in Patent Document 1, the yarn unwound from the yarn accumulating roller rotates the flyer relative to the torque, and receives a force from the flyer due to its reaction. The force received from the flyer becomes a resistance when the yarn is unwound from the yarn accumulating roller. As described above, the yarn is subjected to resistance when being unwound from the yarn accumulating roller. As a result, the yarn is less likely to come off at a stretch, so that the slacking of the yarn on the yarn accumulating roller as a lump is prevented. be able to.

  As described above, since the yarn receives resistance when it is unwound from the yarn storage device, the yarn is stretched between the flyer and the winding device that winds the yarn downstream of the flyer. It can be kept in the state. In this way, since an appropriate tension can be applied to the yarn wound by the winding device, a high-quality package can be formed.

  Incidentally, in the spinning machine of Patent Document 1, when the winding speed of the winding device is increased, the unwinding speed of the yarn from the yarn accumulating device is also increased, so that the relative rotational speed of the fryer is also increased. On the other hand, since the relative rotational speed of the flyer is naturally limited, if the unwinding speed of the yarn exceeds the limit of the relative rotational speed of the flyer, a flyer lag will occur and a balloon will be generated or the thread will be There is a possibility that a problem of wrapping around Therefore, in the yarn winding machine including the yarn storage device having the configuration of Patent Document 1, there is a limit to increasing the yarn winding speed. In addition, the limit of the winding speed in the yarn winding machine provided with the yarn accumulating device having a flyer is about 500 m / min.

  Since the spinning machine has a relatively low winding speed, the yarn can be normally wound even when a yarn storage device having a flyer is employed (configuration of Patent Document 1). However, in an automatic winder or the like having a relatively high winding speed, the winding speed exceeds the limit of the rotational speed of the fryer, so it is difficult to employ a yarn storage device having a fryer. Further, in the automatic winder, the yarn is wound around the winding bobbin while traversing (traversing), so that a periodic speed fluctuation occurs due to the traverse. Further, in the automatic winder, in order to break the ribbon winding of the yarn, a control called disturb control for changing the winding speed abruptly is performed. Since inertia is acting on the fryer, it is difficult to make the rotation of the fryer follow the fluctuation of the winding speed as described above. This is also a problem when a yarn storage device having a flyer is applied to an automatic winder.

  In this regard, the yarn splicing and winding device disclosed in Patent Document 2 includes a yarn accumulating device (length measuring / accumulating portion) having a configuration without a flyer. As described above, when the relative rotation member (flyer) is omitted, the above-described problem that the flyer has does not occur even when the yarn accumulating device rotates at high speed. Note that the yarn accumulating device described in Patent Document 2 has a configuration in which a stopper flange is provided at the tip of the accumulating drum portion instead of the flyer. By providing the stopper flange in this way, it is possible to prevent the yarn stored in the storage drum portion from lumping and coming off at once (sluffing). However, the provision of the stopper flange alone cannot provide an appropriate resistance to the yarn unwound from the storage drum portion, and therefore, the generation of a balloon cannot be prevented at high speed rotation. Therefore, the configuration of Patent Document 2 cannot be applied to the automatic one-rider as it is.

  Therefore, the applicant of the present application is examining a yarn accumulating device having a rubber ring instead of a fryer. Specifically, as shown in FIG. 11, the yarn accumulating device 100 has a rubber ring 102 hung on the unwinding side end portion of a metal yarn accumulating roller 101, and the yarn 99 unwound from the yarn accumulating roller 101. Is passed between the surface of the yarn accumulating roller 101 and the rubber ring 102. The diameter of the rubber ring 102 is set smaller than the outer diameter of the yarn accumulating roller 101 in a state where no load is applied. With this configuration, since the rubber ring 102 tightens the outer peripheral surface of the yarn storage roller 101, the yarn 99 passing between the surface of the yarn storage roller 101 and the rubber ring 102 can be lightly sandwiched. Thereby, an appropriate resistance can be applied when the yarn 99 is unwound from the yarn accumulating roller 101.

  As described above, the yarn accumulating device 100 having the configuration shown in FIG. 11 has an extremely simple configuration in which the rubber ring 102 is simply hung on the yarn accumulating roller 101, but is suitable for the yarn 99 unwound from the yarn accumulating roller 101. Resistance can be imparted. Thereby, generation | occurrence | production of a balloon, sluffing, etc. can be prevented, and moderate tension | tensile_strength can be provided with respect to the thread | yarn downstream from the said thread | yarn storage apparatus 100. FIG. And since the structure of FIG. 11 does not have a movable part like a flyer, the followability to the rapid fluctuation | variation of winding speed is also excellent. Further, the rubber ring 102 generates an appropriate frictional effect with the yarn 99 passing under the rubber ring 102, rolls the yarn in the twisting direction, and twists the fluff, thereby twisting the yarn 99. It has an excellent characteristic that it is highly effective in reducing fluff. As a material of the rubber ring 102, NBR (nitrile rubber) excellent in wear resistance and the like is particularly suitable.

  Patent Document 3 discloses a configuration in which a yarn is sandwiched between a finger extending from a yarn reservoir and a ring arranged around the finger. According to Japanese Patent Application Laid-Open No. 2003-228561, it is possible to obtain a higher yarn drawing tension and a relatively balanced yarn drawing tension. However, in the configuration of Patent Document 3, a plurality of fingers that act elastically toward the outside of the yarn reservoir must be formed, which increases the manufacturing cost. Moreover, since the jacket surface is discontinuous in the circumferential direction in the portion of the finger, the configuration of Patent Document 3 damages the yarn that is unwound while sliding at the position of the finger. it is conceivable that. In this respect, the configuration of FIG. 11 is a simple configuration in which only a rubber ring is provided, so that the manufacturing cost is low and the damage to the yarn is small.

JP 2010-77576 A JP 2004-131276 A JP 63-262376 A

  Incidentally, when the yarn accumulating roller 101 is rotated in the yarn accumulating device 100 of FIG. 11, a centrifugal force is applied to the rubber ring 102. The rubber ring 102 made of NBR has a small expansion ratio of about 50%. In other words, since there is no “stickiness (elasticity)”, when the centrifugal force is applied, the rubber ring 102 is easily separated from the surface of the yarn accumulating roller 101. . If the rubber ring 102 moves away from the surface of the yarn accumulating roller 101 in this manner, it becomes impossible to give an appropriate resistance to the yarn 99 unwound from the yarn accumulating roller 101. Cannot be prevented, and an appropriate tension cannot be applied to the yarn downstream of the yarn accumulating device 100.

  In order to cope with the above problems, it is also conceivable to use a rubber ring (a rubber ring having a smaller diameter) that can exhibit a tightening force that can resist the centrifugal force when the yarn accumulating roller 101 rotates at a high speed. . However, in this case, since the force with which the rubber ring 102 tightens the yarn accumulating roller 101 is too large at the time of low rotation (when the centrifugal force is small), excessive resistance is required to pull out the yarn 99 from the yarn accumulating roller 101 at the time of low rotation. It takes. In this case, at the time of low-speed rotation, another problem occurs that the yarn 99 is stretched when the yarn 99 is pulled out from the yarn accumulating roller 101.

  On the other hand, it has been considered to use a rubber ring (rubber rubber) made of natural rubber instead of the rubber ring made of NBR. The elastic rate of the rubber ring made of natural rubber is 500% to 900%, so to speak, there is “tackiness (elasticity)”, so that it stays in close contact without being separated from the surface of the yarn accumulating roller 101 even when a centrifugal force is applied. Can do. Therefore, since it is not necessary to tighten the rubber ring unnecessarily so as to withstand the centrifugal force of high speed rotation, it is possible to prevent the yarn from being broken during low speed rotation. When a rubber ring made of natural rubber is used in the yarn storage device 100 of FIG. 11, there is no problem in storing yarn while the rubber ring is new, and a low yarn winding speed to a high yarn winding speed (for example, 1200 m / second). min).

  However, the rubber ring made of natural rubber has no durability, and there is a problem that the surface of the rubber ring is quickly deteriorated due to friction with the yarn. In addition, since natural rubber is sticky, there are problems such as yarn fibers and cotton wool becoming entangled and becoming bumpy. Further, no matter how high the expansion ratio of the rubber ring made of natural rubber is, the centrifugal force is applied to the opening side of the rubber ring, so that the resistance applied to the yarn during the high speed rotation of the yarn storage roller 101 is avoided. I can't.

  The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a yarn accumulating device that can cope with a wide range from low-speed winding to high-speed winding.

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 a first aspect of the present invention, a yarn storage device having the following configuration is provided. This yarn storage device winds and stores a yarn around a yarn storage portion formed on the outer peripheral surface of the rotating body, and the yarn storage device unwinds the yarn from the yarn storage portion in a direction along the rotation axis of the rotating body. In addition, a tension applying unit is provided. The tension applying unit is provided on the unwinding side of the yarn storage unit, and applies tension to the yarn unwound from the yarn storage unit while rotating synchronously with the yarn storage unit. The tension applying portion includes a ring member made of an elastic body that can be expanded and contracted, and an enlargement / reduction portion that is provided on the radially inner side of the ring member and sandwiches the yarn between the ring member. The enlargement / reduction unit enlarges / reduces the diameter according to the rotation speed of the rotating body.

  In this way, by inserting the yarn between the elastic ring member and the enlargement / reduction portion, tension can be applied to the yarn unwound from the yarn storage portion. And since the enlargement / reduction part is configured to enlarge / reduce the diameter according to the rotation speed of the rotating body, even if the ring member expands outside due to centrifugal force when the rotation speed increases, the ring It is possible to keep the member and the enlargement / reduction portion in close contact with each other. Thereby, an appropriate tension can be applied to the yarn from low speed rotation to high speed rotation.

  The yarn storage device is preferably configured as follows. That is, the enlarging / reducing portion is formed with a recess that restricts movement of the ring member in the direction of the rotation axis of the rotating body. And the said ring member is attached to the said recessed part of the said expansion / contraction part.

  Thereby, it is possible to prevent the ring member from being dragged by the yarn drawn from the yarn storage device.

  In the yarn accumulating device, it is preferable that the enlargement / reduction portion has a recess maintaining mechanism that maintains the recess regardless of enlargement and reduction of the diameter of the enlargement / reduction portion.

  Thereby, it can prevent that a ring member remove | deviates from an expansion / contraction part even at the time of high speed rotation and low speed rotation.

  The yarn storage device is preferably configured as follows. That is, the outer peripheral surface of the enlargement / reduction section is formed of an elastic film made of a film-like elastic body. The concave portion maintaining mechanism includes an unevenness maintaining ring portion formed along a circumferential direction of the enlargement / reduction portion. And the said uneven | corrugated maintenance ring part is comprised from the elastic body, and is arrange | positioned inside the said elastic film.

  In other words, by arranging the unevenness maintaining ring part having an appropriate diameter inside the elastic film, the concave part can be formed on the outer surface of the elastic film (the outer peripheral surface of the enlargement / reduction part). And since the unevenness | corrugation maintenance ring part is comprised from the elastic body, the diameter of the said unevenness | corrugation maintenance ring part can be expanded / reduced. Thereby, the diameter of an expansion / contraction part can be expanded / reduced, maintaining the shape of a recessed part.

  The yarn storage device is preferably configured as follows. That is, a disk member having a diameter larger than the outer diameter of the enlargement / reduction portion when the rotating body is stopped is provided at the unwinding side end of the rotating body. The enlargement / reduction portion is provided between the yarn storage surface portion and the disk member.

  Thereby, after the yarn unwound from the yarn storage surface contacts the enlargement / reduction portion, it travels away from the enlargement / reduction portion while being guided by the disk member. By guiding the yarn in this way, the area where the yarn comes into contact with the enlargement / reduction portion can be reduced, so that fuzzing of the yarn and deterioration of the physical properties of the yarn can be prevented. Further, it is possible to prevent the enlargement / reduction portion from being rubbed and damaged by the yarn when the yarn is removed.

  In the yarn storage device, it is preferable that a portion of the ring member that sandwiches the yarn between the ring member and the enlargement / reduction portion is formed in a planar shape.

  Thereby, since it can prevent that a ring member twists on an expansion / contraction part, the stable tension | tensile_strength can be provided with respect to a thread | yarn.

  In the yarn accumulating device, it is preferable that a drive unit that enlarges or reduces the diameter of the enlargement / reduction unit is provided.

  Thereby, the tension applied to the yarn can be increased and decreased as well as constant.

  According to a second aspect of the present invention, a yarn storage device having the following configuration is provided. This yarn storage device winds and stores a yarn around a yarn storage portion formed on the outer peripheral surface of the rotating body, and the yarn storage device unwinds the yarn from the yarn storage portion in a direction along the rotation axis of the rotating body. In addition, a tension applying unit is provided. The tension applying unit is provided on the unwinding side of the yarn storage unit, and applies tension to the yarn unwound from the yarn storage unit while rotating synchronously with the yarn storage unit. The tension applying unit includes a first ring-shaped elastic body, a synchronous rotating member, a second ring-shaped elastic body, and a cylindrical member. The first ring-shaped elastic body is attached to the surface of the rotating body. The synchronous rotating member is arranged on the outer side in the radial direction of the rotating body and is configured to be able to rotate synchronously with the rotating body. The second ring-shaped elastic body is provided on the synchronous rotating member. The cylindrical member is provided on the synchronous rotating member so as to face the first ring-shaped elastic body from the radially outer side. In the stopped state of the rotating body, the first ring-shaped elastic body is in a non-contact state with the cylindrical member, and the second ring-shaped elastic body is in a state of being in contact with the surface of the rotating body. Then, the yarn stored in the yarn storage portion passes between the first ring-shaped elastic body and the cylindrical member and between the second ring-shaped elastic body and the surface of the rotating body. Will be solved.

  With this configuration, while the rotating body rotates at a low speed, tension is applied to the yarn by the surface of the rotating body and the second ring-shaped elastic body. When the rotating body rotates at a high speed, a force in a direction in which the second ring-shaped elastic body is separated from the rotating body is acted on by centrifugal force. Therefore, the second ring-shaped elastic body cannot apply an appropriate tension to the yarn. However, on the other hand, in the high-speed rotation region, the first ring-shaped elastic body is pressed against the cylindrical member by centrifugal force. Thereby, at the time of high speed rotation, tension is applied to the yarn by the first ring-shaped elastic body and the cylindrical member. As a result, it is possible to apply an appropriate tension to the yarn during both low-speed rotation and high-speed rotation.

  According to the 3rd viewpoint of this invention, the yarn winding machine of the following structures provided with said yarn storage device is provided. That is, the yarn winding machine applies a tension to the yarn supply unit that supplies the yarn, the yarn joining device that connects the divided yarn ends, the yarn storage device, and the yarn in order along the traveling direction of the yarn. A tension applying device, and a winding unit that winds the yarn supplied from the yarn supplying unit to form a package. The winding unit can continue winding while applying tension to the yarn unwound from the yarn storage device by the tension applying device while the yarn joining device is performing the yarn joining operation. It is.

  That is, the yarn accumulating device can apply a constant tension to the yarn to be unwound regardless of whether the rotation is low speed or high speed. Therefore, the tension in the tension applying device arranged on the downstream side of the yarn accumulating device. Control becomes easy. Further, since the winding unit winds the yarn stored in the yarn storage device, the winding operation can be continued without being affected by the unwinding tension variation of the yarn supplying unit or the yarn joining operation.

The side view of the winder unit with which the automatic winder which concerns on one Embodiment of this invention is provided. The side view of a thread | yarn storage apparatus. Sectional drawing of a thread | yarn storage apparatus. The external appearance perspective view of a tension provision part. Sectional drawing of the tension provision part at the time of low speed rotation. Sectional drawing of the tension provision part at the time of high speed rotation. Sectional drawing of the thread | yarn storage apparatus which concerns on 2nd Embodiment. Sectional drawing of the thread | yarn storage apparatus which concerns on 3rd Embodiment. Sectional drawing of the tension | tensile_strength provision part of 3rd Embodiment at the time of low speed rotation. Sectional drawing of the tension | tensile_strength provision part of 3rd Embodiment at the time of high speed rotation. The side view of the conventional thread | yarn storage apparatus.

  Next, an embodiment of the present invention will be described. FIG. 1 is a schematic side view of a winder unit 2 provided in an automatic winder as a yarn winding machine according to a first embodiment of the present invention. The automatic winder of this embodiment has a configuration in which a large number of winder units 2 are arranged side by side. The automatic winder includes an unillustrated machine base management device for centrally managing the winder unit 2 and an unillustrated blower box including a compressed air source and a negative pressure source.

  As shown in FIG. 1, the winder unit 2 mainly includes a yarn supplying unit 7 and a winding unit 8. The winder unit 2 is configured to unwind the yarn (spun yarn) 20 of the yarn feeding bobbin 21 supported by the yarn feeding unit 7 and to wind it around the package 30. FIG. 1 shows a state of the winder unit 2 during normal winding. In this specification, “at the time of normal winding” means that the yarn is in a continuous state between the yarn supplying bobbin 21 and the package 30, and the yarn is unwound from the yarn supplying bobbin 21 and the yarn is fed to the package 30. The state being wound.

  The yarn supplying section 7 is configured to be able to hold a yarn supplying bobbin 21 for supplying yarn in a substantially upright state. The yarn supplying section 7 is configured to be able to discharge the empty yarn supplying bobbin 21. The winding unit 8 includes a cradle 23 configured to be capable of mounting the winding bobbin 22, and a traverse drum 24 for traversing the yarn 20 and driving the winding bobbin 22.

  The traverse drum 24 is disposed opposite to the winding bobbin 22, and the winding bobbin 22 is driven to rotate by rotating the traverse drum 24. Thereby, the yarn 20 stored in the yarn storage device 18 described later can be wound on the winding bobbin 22. Further, a traverse groove (not shown) is formed on the outer peripheral surface of the traverse drum 24, and the traverse (traverse) of the yarn 20 with a predetermined width can be performed by the traverse groove. With the above configuration, the yarn 20 can be wound around the take-up bobbin 22 while traversing to form a package 30 having a predetermined length and a predetermined shape. In the following description, the terms “upstream” and “downstream” refer to the upstream and downstream sides when viewed in the yarn traveling direction.

  Each winder unit 2 includes a control unit 25. The control unit 25 includes hardware such as a CPU, ROM, and RAM (not shown) and software such as a control program stored in the RAM. The hardware and software cooperate to control each configuration of the winder unit 2. Moreover, the control part 25 with which each winder unit 2 is provided is comprised so that communication with the said machine stand management apparatus is possible. As a result, the operations of the plurality of winder units 2 included in the automatic winder can be centrally managed in the machine management device.

  The winder unit 2 includes various devices in the yarn traveling path between the yarn supplying unit 7 and the winding unit 8. More specifically, in the yarn traveling path, the unwinding assisting device 10, the lower yarn blowing unit 11, and the first tension applying device 12 are sequentially arranged from the yarn feeding unit 7 side to the winding unit 8 side. The upper yarn catching unit 13, the yarn joining device 14, the yarn trap 15, the cutter 16, the clearer (yarn defect detecting device) 17, the upper yarn drawing unit 48, the yarn accumulating device 18, and the second tension. An applicator 19 is arranged.

  The unwinding assisting device 10 brings the movable member 40 into contact with the balloon formed on the upper portion of the yarn supplying bobbin 21 by swinging the yarn 20 to be unwound from the yarn supplying bobbin 21, and appropriately sets the size of the balloon. This is for assisting the unwinding of the yarn 20 by controlling.

  The lower thread blowing unit 11 is an air soccer device disposed immediately downstream of the unwinding assisting device 10 so that the lower thread on the yarn supplying bobbin 21 can be blown toward the yarn joining device 14 side. It is configured. When the yarn 20 is in a divided state between the yarn supplying bobbin 21 and the yarn accumulating device 18, the lower yarn blowing unit 11 can blow up the yarn on the yarn supplying bobbin 21 and guide it to the yarn joining device 14. .

  The first tension applying device 12 applies a predetermined tension to the traveling yarn 20. The first tension applying device 12 of the present embodiment is configured as a gate type in which movable comb teeth are arranged with respect to fixed comb teeth, and a predetermined resistance is provided by running a thread between the comb teeth. Is configured to do. The movable comb teeth are configured to be movable by a solenoid so that the meshing state of the comb teeth can be adjusted. The controller 25 can adjust the tension applied to the yarn by the first tension applying device 12 by controlling the solenoid. However, the configuration of the first tension applying device 12 is not limited to this, and for example, a disk-type tension applying device may be used.

  The upper thread catcher 13 is disposed immediately upstream of the yarn joining device 14. The upper yarn catching unit 13 is connected to a negative pressure source (not shown), and is configured to generate a suction air flow at the time of yarn joining to suck and catch the yarn on the yarn storage device 18 side. Later).

  The yarn trap 15 is disposed upstream of the cutter 16 and immediately downstream of the yarn joining device 14. The tip of the yarn trap 15 is formed as a cylindrical member, is provided close to the traveling path of the yarn 20, and is connected to a negative pressure source (not shown). With this configuration, a suction air flow is generated at the tip of the yarn trap 15, and dust such as fluff adhering to the traveling yarn 20 can be sucked and removed.

  The clearer 17 is configured to detect a yarn defect (yarn defect) such as a slab by monitoring the thickness of the yarn 20. When the clearer 17 detects a yarn defect, the clearer 17 transmits a division signal instructing cutting and removal of the yarn defect to the control unit 25 or the like. In the vicinity of the clearer 17, a cutter 16 for cutting the yarn 20 immediately in accordance with the dividing signal is arranged.

  The upper thread drawing portion 48 is an air soccer device, and is configured to be able to draw out the yarn stored in the yarn storage device 18 and blow it toward the yarn guide member 60 (described later) at the time of yarn joining. Yes.

  The yarn accumulating device 18 includes a substantially cylindrical yarn accumulating roller 32 and a roller driving motor 33 that rotationally drives the yarn accumulating roller 32 with its axis as a rotation center axis. The roller drive motor 33 is controlled by the control unit 25. With this configuration, the yarn 20 unwound from the yarn feeding bobbin 21 is wound around the outer peripheral surface of the yarn storage roller 32 while the yarn storage roller 32 is rotationally driven, whereby the yarn 20 is temporarily wound around the yarn storage roller 32. It can be stored. Then, the yarn stored on the yarn storage roller 32 is drawn out in a direction along the axial direction of the yarn storage roller 32, and then wound on the winding unit 8. The detailed configuration of the yarn storage device 18 will be described later.

  The yarn splicing device 14 is used when the clearer 17 detects a yarn defect and cuts the yarn with the cutter 16, when the yarn being unwound from the yarn feeding bobbin 21 is broken, or when the yarn feeding bobbin 21 is replaced. When the yarn 20 between the yarn supplying bobbin 21 and the yarn accumulating device 18 is in a divided state, the yarn on the yarn supplying bobbin 21 side and the yarn on the yarn accumulating device 18 side are spliced. . As such a yarn splicing device 14, a device using a fluid such as compressed air or a mechanical device can be used.

  The second tension applying device 19 applies a predetermined tension to the yarn drawn out from the yarn accumulating device 18, and thereby controls the tension of the yarn 20 when being wound around the winding unit 8. The second tension applying device 19 is configured as a gate type tensioner like the first tension applying device. The controller 25 can adjust the tension applied to the yarn by the second tension applying device 19 by appropriately controlling the solenoid of the second tension applying device 19. However, the configuration of the second tension applying device 19 is not limited to this, and may be, for example, a disk-type tension applying device.

  A magazine-type bobbin supply device 26 is disposed on the front side of the winder unit 2. The bobbin supply device 26 includes a rotary magazine can 27. The magazine can 27 is configured to hold a plurality of spare yarn feeding bobbins 21. The bobbin supply device 26 is configured to supply a new yarn supplying bobbin 21 to the yarn supplying unit 7 by intermittently rotating the magazine can 27. The bobbin supply device 26 includes a yarn end holding unit 28 that sucks and holds the yarn end of the yarn feeding bobbin 21 held by the magazine can 27.

  Next, the yarn splicing operation in the automatic winder of this embodiment will be described.

  That is, when the yarn on the yarn storage device 18 side and the yarn on the yarn supply bobbin 21 side are separated due to yarn breakage, yarn cutting with the cutter 16, or replacement of the yarn supply bobbin 21, the yarn joining is performed. Yarn splicing work by the device 14 is performed. Specifically, the control unit 25 first blows up the yarn 20 on the yarn supplying bobbin 21 side upward by the lower yarn blowing unit 11. The 20 yarns blown up are sucked and captured by the yarn trap 15. The yarn trap 15 is configured to be movable by a yarn trap driving unit 47. The yarn trap 15 is configured such that the yarn on the yarn feeding bobbin 21 side can be introduced into the yarn joining device 14 by moving in a state where the yarn end on the yarn feeding bobbin 21 side is sucked and captured. Yes.

  Before and after this, the control unit 25 blows off the yarn 20 on the yarn storage roller by the upper yarn drawing unit 48 while rotating the yarn storage roller of the yarn storage device 18 in the reverse direction. A curved tube-shaped yarn guide member 60 is provided at the tip from which the upper yarn drawing portion 48 blows out the yarn 20. The blown yarn 20 is blown into the yarn guide member 60 from one end of the yarn guide member 60 and is guided to the other end side of the yarn guide member 60 by riding on the air flow. An upper thread catcher 13 is disposed at the tip of the outlet on the other end side of the thread guide member 60. With the above configuration, the yarn 20 on the yarn accumulating roller side blown off by the upper yarn drawing portion 48 is sucked and caught by the upper yarn catching portion 13. The tube-shaped thread guide member 60 is formed with a slit along the longitudinal direction thereof, and is configured so that the thread 20 in the thread guide member 60 can be taken out through the slit. Yes. The yarn taken out from the yarn guide member 60 is further sucked by the upper yarn catcher 13 and is introduced into the yarn joining device 14. The control unit 25 stops the reverse rotation of the yarn accumulating roller 32 when the yarn on the yarn accumulating device 18 side is introduced into the yarn joining device 14.

  With the above operation, the yarn on the yarn feeding bobbin 21 side and the yarn on the yarn storage device 18 side can be introduced into the yarn joining device 14. In this state, the control unit 25 operates the yarn joining device 14 to join the yarn on the yarn feeding bobbin 21 side and the yarn on the yarn storage device 18 side. When the yarn splicing operation is completed, the control unit 25 resumes the winding of the yarn around the yarn accumulating device 18 by resuming the normal rotation of the yarn accumulating device 18.

  Even when the yarn between the yarn supplying bobbin 21 and the yarn accumulating device 18 is in a divided state as described above, the winding of the yarn 20 around the package 30 in the winding unit 8 is interrupted. Can continue without. That is, in the automatic winder of the present embodiment, as described above, the yarn storage device 18 is interposed between the yarn supply unit 7 and the winding unit 8, and a certain amount of yarn 20 is stored on the yarn storage device 18. Therefore, even if the supply of the yarn from the yarn supplying bobbin 21 is interrupted for some reason (for example, during the yarn joining operation), the winding unit 8 is stored on the yarn storage device 18. Therefore, the winding of the yarn 20 around the package 30 can be continued.

  Thus, since the winding operation in the winding unit 8 is not interrupted by the yarn joining operation or the like, the package 30 can be generated at high speed and stably. Further, since the yarn accumulating device 18 is interposed between the yarn supplying bobbin 21 and the yarn take-up unit 8 without being affected by fluctuations in tension when the yarn is unwound from the yarn supplying bobbin 21. It can be performed.

  Next, the yarn accumulating device 18 will be described with reference to FIGS. 2 and 3. As described above, the yarn storage device 18 includes the yarn storage roller 32.

  The yarn accumulating roller (rotating body) 32 is a substantially cylindrical roller member, and includes a yarn accumulating portion 37 and a tension applying portion 38. The yarn storage portion 37 is formed on the outer peripheral surface of the yarn storage roller 32. As shown in FIG. 2, the yarn 20 unwound from the yarn supplying bobbin 21 is introduced from one end side of the yarn accumulating roller 32 to the outer peripheral surface of the yarn accumulating roller 32 and wound around the yarn accumulating portion 37. Then, it is pulled out from the other end side of the yarn accumulating roller 32 and sent to the winding unit 8 side. In the following description, when considered in the direction along the central axis of the yarn accumulating roller 32, the side on which the yarn on the yarn supplying bobbin side is introduced with respect to the yarn accumulating roller 32 (diagonally lower left side in FIG. 2) is based. The end side, the side from which the yarn is drawn out from the yarn storage roller 32 (obliquely upper right side in FIG. 2) is called the unwinding side.

  As shown in FIG. 3, the yarn storage portion 37 is composed of a cylindrical portion 37a and a tapered portion 37b. In addition, the outer peripheral surface of the yarn storage unit 37 is made of metal.

  A certain amount of yarn 20 can be wound and stored around the outer peripheral surface of the cylindrical portion 37a. More specifically, the yarn on the yarn supplying bobbin 21 side is introduced to the outer peripheral surface of the cylindrical portion 37a from the end portion on the proximal end side of the cylindrical portion 37a, and is wound spirally around the outer peripheral surface. In a state where the yarn 20 is wound around the cylindrical portion 37a, the yarn accumulating roller 32 is rotationally driven by the roller drive motor 33, whereby the yarn can be sequentially wound around the surface of the cylindrical portion 37a. The yarn 20 newly wound around the proximal end portion of the cylindrical portion 37a is wound while pushing the yarn 20 already wound around the cylindrical portion 37a toward the unwinding side end portion. Thereby, the yarn stored on the surface of the cylindrical portion 37a sequentially moves toward the unwinding side end. The diameter of the cylindrical portion 37a is not completely constant, and a small taper is formed so that the diameter on the unwinding side gradually decreases. Thereby, the yarn wound around the cylindrical portion 37a is easily moved toward the unwinding side end portion.

  The tapered portion 37b is formed continuously to the proximal end portion of the cylindrical portion 37a. The tapered portion 37b is formed in a tapered shape whose diameter increases toward the opposite side (base end side) from the cylindrical portion 37a. Since the tapered portion 37b is formed in this way, the yarn 20 wound around the tapered portion 37b moves from the tapered portion 37b to the cylindrical portion 37a by the tension at the time of winding. Thereby, the thread | yarn 20 previously wound around the cylindrical part 37a is pushed up by the newly wound thread | yarn 20. FIG. As described above, as the yarn sequentially moves from the tapered portion 37b to the cylindrical portion 37a, the yarn 20 is wound regularly and spirally around the cylindrical portion 37a.

  The yarn stored in the yarn storage unit 37 is unwound toward the unwinding side. At this time, the yarn is unwound by the tension applying unit 38 disposed on the unwinding side of the yarn storage unit 37. On the other hand, a predetermined resistance is given (details will be described later).

  As shown in FIG. 2, a yarn guide 29 for guiding the yarn is disposed at a position ahead of the unwinding side end portion of the tension applying portion 38. The yarn guide 29 is configured to guide the yarn at a predetermined position on the extension line of the rotation shaft of the yarn accumulating roller 32. As a result, the yarn 20 spirally wound around the yarn storage roller 32 can be pulled out in the direction along the axis of the yarn storage roller 32 while being unwound from the yarn storage roller 32. The yarn to which the tension is applied by the tension applying unit is wound on the downstream side (winding unit 8 side) via the yarn guide 29.

  As shown in FIG. 2, in the vicinity of the yarn accumulating roller 32, an upper limit sensor 36 that detects that the yarn 20 on the yarn accumulating roller 32 has reached a predetermined upper limit amount and less than a predetermined lower limit amount. And a lower limit sensor 35 for detecting this. The detection results of the lower limit sensor 35 and the upper limit sensor 36 are sent to the control unit 25.

  When the control unit 25 detects that the upper limit sensor 36 is OFF and the yarn on the yarn storage roller 32 has become less than the upper limit, the controller 25 appropriately controls the roller drive motor 33 to increase the rotational speed of the yarn storage roller 32. Let As a result, the speed at which the yarn 20 is wound around the yarn accumulating roller 32 increases, and as a result, the amount of yarn 20 stored on the yarn accumulating roller 32 can be gradually increased. On the other hand, when the upper limit sensor 36 is turned on and the controller 25 detects that the yarn on the yarn accumulating roller 32 exceeds the upper limit amount, the controller 25 appropriately controls the roller drive motor 33 to rotate the yarn accumulating roller 32. Decrease. As a result, the speed at which the yarn 20 is wound around the yarn accumulating roller 32 is reduced. As a result, the amount of the yarn 20 on the yarn accumulating roller 32 can be gradually reduced. By the above control, the storage amount of the yarn 20 on the yarn storage roller 32 can be kept substantially constant near the upper limit amount.

  Further, when the lower limit sensor 35 is turned OFF and the control unit 25 detects that the yarn on the yarn storage roller 32 has become less than the lower limit amount, the control unit 25 stops the winding of the yarn 20 by the winding unit 8. Thereby, all the yarns on the yarn accumulating roller 32 are prevented from being taken up by the winding unit 8.

  Next, the configuration of the tension applying unit 38 will be described in detail.

  The tension applying unit 38 is configured to rotate integrally with the yarn storage unit 37 (synchronous rotation), and includes an enlargement / reduction unit 50 and a rubber ring (ring member) 51.

  As shown in FIG. 3, the outer peripheral surface of the enlargement / reduction section 50 is composed of a rubber film 52 (elastic film) made of an elastic body (made of NBR in this embodiment). More specifically, it is as follows. As shown in FIGS. 3 and 4, the yarn accumulating roller 32 includes a rubber film 52 formed in a substantially cylindrical shape. Both ends in the axial direction of the rubber film 52 are fixed to the outer periphery of the yarn accumulating roller 32 by an appropriate method such as adhesion. Thereby, the outer periphery of the expansion / contraction part 50 is substantially cylindrical. However, the outer diameter of the enlargement / reduction portion 50 is not constant, and the unevenness includes the first protrusion 50a, the second protrusion 50b, and the recess 50c between the first protrusion 50a and the second protrusion 50b. have.

  The enlargement / reduction unit 50 includes a recess maintaining mechanism 58 that maintains the recess 50c. As shown in FIGS. 3 and 4, the recess maintaining mechanism 58 includes a plurality of unevenness maintaining rings (irregularity maintaining ring portions) 55 and 56 formed in a ring shape along the circumferential direction inside the rubber film 52 in the radial direction. , 57. The unevenness maintaining rings 55, 56, and 57 are made of an elastic body (NBR in the case of this embodiment).

  The plurality of unevenness maintaining rings are arranged side by side in the axial direction of the yarn accumulating roller 32, and are sequentially formed from the proximal end side as a first convex portion maintaining ring 55, a concave portion maintaining ring 56, and a second convex portion maintaining ring 57. Yes. Further, in a state where no load is applied (when the rotation of the yarn accumulating roller 32 is stopped), the diameter of the concave portion maintaining ring 56 is set to be smaller than the diameters of the two convex portion maintaining rings 55 and 57. With this configuration, on the outer peripheral surface of the rubber film 52 (the outer peripheral surface of the enlargement / reduction portion 50), the first convex portion 50a corresponding to the diameter of the first convex portion maintaining ring 55 and the concave portion corresponding to the diameter of the concave portion maintaining ring 56 are provided. 50c and the 2nd convex part 50b corresponding to the diameter of the 2nd convex part maintenance ring 57 are formed, respectively.

  On the other hand, the rubber ring 51 is configured as a ring member made of an elastic body (manufactured by NBR in the case of the present embodiment). Has been placed. The diameter of the rubber ring 51 in an unloaded state is set to be slightly smaller than the outer diameter of the recess 50c of the enlargement / reduction section 50. Thus, the rubber ring 51 is configured to tighten the concave portion 50c of the enlargement / reduction portion 50 from the outside in the radial direction.

  As shown in FIGS. 2 and 5, the yarn 20 unwound from the yarn storage unit 37 passes between the outer peripheral surface of the enlargement / reduction unit 50 and the rubber ring 51 in the tension applying unit 38 to store the yarn. The roller 32 is drawn out. Since the rubber ring 51 fastens the enlargement / reduction portion 50, the thread 20 passing through the tension applying portion 38 passes while being sandwiched between the outer peripheral surface of the enlargement / reduction portion 50 and the rubber ring 51. With this configuration, when the yarn 20 is pulled out from the yarn accumulating roller 32, an appropriate resistance can be given to the yarn 20 and, as a result, sluffing can be prevented. Further, by applying resistance to the yarn 20 when being drawn out from the yarn accumulating roller 32, the yarn 20 on the downstream side of the yarn accumulating roller 32 can be kept in a stretched state. That is, since an appropriate tension can be applied to the yarn 20 on the downstream side of the yarn accumulating device 18, the yarn can be wound with an appropriate tension in the winding unit 8.

  Further, since the yarn 20 stored in the yarn storage portion 37 is spirally wound around the outer peripheral surface of the cylindrical portion 37a, the yarn 20 is swung around the enlargement / reduction portion 50 when being unwound from the cylindrical portion 37a. It is solved while being. According to the configuration of the present embodiment, since the thread 20 to be swung is sandwiched between the outer peripheral surface of the enlargement / reduction unit 50 and the rubber ring 51, it is possible to prevent the thread 20 from being swung excessively and to prevent generation of a balloon. . Since the yarn 20 is unwound while being swung as described above, the position where the yarn 20 passes between the outer peripheral surface of the enlargement / reduction portion 50 and the rubber ring 51 moves in the circumferential direction. As described above, since the position through which the yarn 20 passes moves in the circumferential direction, only specific portions of the enlargement / reduction portion 50 and the rubber ring 51 are rubbed by the yarn 20 and are prevented from being worn in a short time. be able to.

  Further, as described above, since the rubber ring 51 is attached to the concave portion 50c of the enlargement / reduction portion 50, even if the rubber ring 51 is moved along the axial direction of the yarn accumulating roller 32 by the yarn 20 being unwound, the convex portion The movement is prevented by 50a and 50b. With this configuration, it is possible to prevent the rubber ring 51 from being detached from the enlargement / reduction unit 50.

  In the yarn accumulating device 18 of the present embodiment, a disk member 39 that rotates integrally with the yarn accumulating roller 32 is provided at the unwinding side end portion of the enlargement / reduction unit 50. The diameter of the disk member 39 is set larger than the outer diameter of the enlargement / reduction section 50 when the rotation of the yarn accumulating roller 32 is stopped. Thereby, the yarn 20 is pulled out from the yarn accumulating roller 32 while being guided by the disk member 39, so that the surface of the rubber film 52 of the enlargement / reduction unit 50 can be prevented from being rubbed strongly by the yarn 20. Thereby, abrasion of the rubber film 52 can be reduced and durability can be improved. This will be described in more detail as follows. While the yarn is wound around the yarn accumulating roller 32, the yarn unwound from the yarn accumulating roller 32 passes while being swung around the rubber film 52, so that only one portion of the rubber film 52 is strongly absorbed by the yarn 20. It is never slid. However, when all the yarn stored in the yarn storage roller 32 is unwound, the yarn that has not been wound passes linearly between the rubber film 52 and the rubber ring 51. If the thread 20 is in contact with the rubber film 52 at this time, the contact portion is strongly slid by the thread 20 and the rubber film 52 may be damaged. Therefore, the disk member 39 is provided as described above, and the thread 20 is allowed to pass while being floated from the rubber film, so that the thread 20 can be prevented from coming into contact with the rubber film 52. Thereby, it is possible to prevent the rubber film 52 from being damaged by the thread. Moreover, since the area where the thread | yarn 20 contacts the rubber film 52 can be reduced, the fluff of the thread | yarn 20 and the fall of a thread | yarn physical property can be prevented.

  As shown in FIG. 5, the rubber ring 51 has a planar portion. That is, the cross-sectional shape of the rubber ring 51 when cut along a plane passing through the central axis of the yarn accumulating roller 32 is substantially D-shaped (kamaboko-shaped). The rubber ring 51 is in contact with the outer peripheral surface of the enlargement / reduction section 50 at the planar portion. Here, although it is conceivable that the cross-sectional shape of the rubber ring 51 is circular, the rubber ring having a circular cross-sectional shape is frequently twisted from the shape. In this regard, if the cross-sectional shape of the rubber ring 51 is substantially D-shaped as in this embodiment, the rubber ring 51 will not be easily twisted. Further, even if the rubber ring 51 having a D-shaped cross-section is twisted, the rubber ring 51 tries to come into contact with the enlargement / reduction portion 50 at the planar portion, so that the twist returns. Furthermore, since the rubber ring having a circular cross-sectional shape is in point contact with the yarn, a stick-slip phenomenon may occur, and the yarn may break due to tension fluctuation. On the other hand, the rubber ring 51 having a substantially D-shaped cross section is in line contact with the yarn, so that stable tensioning can be realized. As described above, since the cross-sectional shape is substantially D-shaped, the rubber ring 51 is less likely to twist and is in line contact with the yarn, so that the resistance applied to the yarn 20 passing under the rubber ring 51 is stable, It is possible to prevent the yarn 20 from being broken and to wind the yarn 20 with a stable tension in the winding unit 8.

  Next, the enlargement / reduction function of the enlargement / reduction unit 50 will be described.

  That is, as already described, when a centrifugal force is applied to the rubber ring due to the rotation of the yarn storage roller, the diameter of the rubber ring increases, so in the conventional yarn storage device (configuration of FIG. 11), There was a possibility that appropriate resistance could not be applied to the yarn passing between the rubber ring and the yarn accumulating roller.

  However, in the yarn storage device 18 of the present embodiment, the outer peripheral surface of the enlargement / reduction unit 50 is configured by the rubber film 52. Therefore, when centrifugal force acts on the enlargement / reduction unit 50, as shown in FIG. The outer diameter of 50 is also enlarged. That is, the diameter of the enlargement / reduction section 50 can be enlarged / reduced according to the rotational speed of the yarn accumulating roller 32. As a result, the outer diameter of the enlargement / reduction portion 50 can be increased following the increase in the diameter of the rubber ring 51 due to the centrifugal force, so that the rubber ring 51 remains on the surface of the enlargement / reduction portion 50 even during high-speed rotation. Can be prevented from leaving. Therefore, according to the yarn storage device 18 of the present embodiment, an appropriate resistance can be imparted to the yarn 20 passing between the surface of the enlargement / reduction unit 50 and the rubber ring 51 even during high-speed rotation. it can.

  Further, as described above, it is possible to prevent the rubber ring 51 from separating from the surface of the enlargement / reduction portion 50 during high-speed rotation, so that the rubber ring that is weaker than the configuration of FIG. 11 (rubber ring having a relatively large diameter). Can be adopted. As described above, by adopting the rubber ring that is relatively weakly tightened, the resistance applied to the yarn 20 becomes excessively large at the time of low-speed rotation (when the centrifugal force is small), and the yarn 20 is stretched out. Can be avoided.

  Then, the outer diameter of the enlargement / reduction portion 50 is also enlarged or reduced following the enlargement or reduction of the diameter of the rubber ring 51. Therefore, according to the configuration of the present embodiment, the rubber is independent of the rotational speed of the yarn accumulating roller 32. The strength with which the ring 51 tightens the enlargement / reduction portion 50 can be kept substantially constant. Further, the enlargement / reduction response of the enlargement / reduction unit 50 to the speed change of the yarn accumulating roller 32 is good. With these characteristics, a mechanism that can be called a mechanical automatic tension control system of some kind can be realized, and the tension applied to the yarn 20 on the downstream side of the yarn accumulating device 18 is applied to the yarn accumulating roller 32. It can be kept substantially constant regardless of the rotation speed. As a result, it becomes easy to control the second tension applying device 19 so as to keep the tension of the yarn 20 within a desired range on the downstream side of the yarn accumulating device 18. As a result, a high-quality package can be formed in the winding unit 8. Can be formed.

  Moreover, in this embodiment, the unevenness | corrugation maintenance rings 55,56,57 which comprise the recessed part maintenance mechanism 58 are elastic bodies (product made from NBR). According to this configuration, the unevenness maintaining rings 55, 56, and 57 can be enlarged or reduced in diameter according to the rotation speed of the yarn accumulating roller 32, so that the enlargement / reduction portion 50 while maintaining the unevenness by the recessed portion maintaining mechanism 58. The diameter can be enlarged or reduced. Thereby, regardless of the rotational speed of the yarn accumulating roller 32, it is possible to prevent the rubber ring 51 from being dragged by the yarn 20 and coming off the enlargement / reduction portion 50 by the unevenness of the enlargement / reduction portion 50.

  In the present embodiment, the concave portion maintaining ring 56 is formed from the inner side of the rubber film 52 to the rubber film 52 so that the rubber film 52 does not bulge outward due to centrifugal force at the concave portion 50c. It is glued. On the other hand, the convex portion maintaining rings 55 and 57 are not necessarily bonded in this manner. For example, in the present embodiment, the first convex portion retaining ring 55 is bonded to the rubber film 52, but the second convex portion retaining ring 57 is merely disposed inside the rubber film 52, and the rubber film 52 is disposed. It is not glued. Thereby, since the 2nd convex-part maintenance ring 57 can move to some extent freely in the direction along a rotating shaft, when the rubber film 52 deform | transforms with a centrifugal force, it can move to an unreasonable position.

  As described above, the yarn storage device 18 of the present embodiment winds and stores the yarn 20 around the yarn storage portion 37 formed on the outer peripheral surface of the yarn storage roller 32, and stores the yarn 20 from the yarn storage portion 37 to the yarn storage roller 32. The yarn 20 is unwound in a direction along the rotation axis of the shaft, and a tension applying portion 38 is provided. The tension applying unit 38 is provided on the unwinding side of the yarn storage unit 37 and applies tension to the yarn 20 unwound from the yarn storage unit 37 while rotating integrally with the yarn storage unit 37. The tension applying unit 38 includes a rubber ring 51 made of an elastic body that can be expanded and contracted, and an expansion / reduction unit 50 that is provided inside the rubber ring 51 in the radial direction and sandwiches the thread 20 between the rubber ring 51. The enlargement / reduction unit 50 enlarges / reduces the diameter according to the rotational speed of the yarn accumulating roller 32.

  In this way, by inserting the yarn 20 between the rubber ring 51 and the enlargement / reduction unit 50, a tension can be applied to the yarn 20 unwound from the yarn storage unit 37. Since the enlargement / reduction section 50 is configured to enlarge / reduce the diameter according to the rotation speed of the yarn accumulating roller 32, the rubber ring 51 expands outward by centrifugal force when the rotation speed increases. However, it is possible to keep the rubber ring 51 and the enlargement / reduction portion 50 in close contact with each other. Thereby, an appropriate tension can be applied to the yarn 20 from low speed rotation to high speed rotation.

  The yarn accumulating device 18 of the present embodiment is configured as follows. That is, the enlargement / reduction portion 50 is formed with a recess 50 c that restricts movement of the rubber ring 51 in the direction of the rotation axis of the yarn accumulating roller 32. The rubber ring 51 is attached to the concave portion 50 c of the enlargement / reduction portion 50.

  Thereby, it is possible to prevent the rubber ring 51 from being pulled by being dragged by the yarn 20 drawn from the yarn storage device 18.

  In the yarn accumulating device 18 according to the present embodiment, the enlargement / reduction unit 50 includes a recess maintaining mechanism 58 that maintains the recess 50c regardless of the diameter of the enlargement / reduction unit 50 being enlarged or reduced.

  Thereby, it is possible to prevent the rubber ring 51 from being detached from the enlargement / reduction unit 50 even during high-speed rotation or low-speed rotation.

  The yarn accumulating device 18 of the present embodiment is configured as follows. In other words, the outer peripheral surface of the enlargement / reduction portion 50 is constituted by the rubber film 52. The concave portion maintaining mechanism 58 includes concave / convex maintaining rings 55, 56, and 57 formed along the circumferential direction of the enlargement / reduction portion 50. The unevenness maintaining rings 55, 56, 57 are made of an elastic body and are arranged inside the rubber film 52.

  That is, the concave and convex portion 50c can be formed on the outer surface of the rubber film 52 (the outer peripheral surface of the enlargement / reduction portion 50) by disposing the unevenness maintaining ring having an appropriate diameter inside the rubber film. And since the unevenness | corrugation maintenance rings 55,56,57 are comprised from the elastic body, the diameter of the unevenness | corrugation maintenance rings 55,56,57 can be expanded / reduced. Thereby, the diameter of the expansion / contraction part 50 can be expanded / reduced, maintaining the shape of the recessed part 50c.

  The yarn accumulating device 18 of the present embodiment is configured as follows. That is, a disk member 39 having a diameter larger than the outer diameter of the enlargement / reduction portion 50 when the yarn storage roller 32 is stopped is provided at the unwinding side end of the yarn storage roller 32. The enlargement / reduction unit 50 is provided between the yarn storage unit 37 and the disk member 39.

  As a result, the yarn 20 unwound from the yarn storage portion 37 contacts the enlargement / reduction portion 50 and then travels away from the enlargement / reduction portion 50 while being guided by the disk member 39. By guiding the yarn 20 in this way, the area where the yarn 20 contacts the enlargement / reduction portion 50 can be reduced, so that fuzzing of the yarn and deterioration of the physical properties of the yarn can be prevented. Further, it is possible to prevent the enlargement / reduction portion 50 from being rubbed and damaged by the yarn when the yarn is removed.

  Further, in the yarn storage device 18 of the present embodiment, the rubber ring 51 has a flat portion where the yarn 20 is sandwiched between the rubber ring 51 and the enlargement / reduction portion 50.

  Thereby, since it can prevent that the rubber ring 51 twists on the expansion / contraction part 50, the stable tension | tensile_strength can be provided with respect to the thread | yarn 20.

  And the automatic winder of this embodiment is the yarn feeding part 7 which supplies the thread | yarn 20 in order along the traveling direction of a thread | yarn, the yarn joining apparatus 14 which connects the parted yarn ends, the thread | yarn storage apparatus 18, A second tension applying device 19 that applies tension to the yarn 20 and a winding unit 8 that winds the yarn 20 supplied from the yarn supplying unit 7 to form a package are provided. The winding unit 8 winds the yarn 20 unwound from the yarn storage device 18 while applying a tension by the second tension applying device 19 while the yarn joining device 14 performs the yarn joining operation. Can be continued.

  That is, since the yarn storage device 18 can apply a constant tension to the yarn to be unwound regardless of whether the rotation is low speed or high speed, the second tension disposed on the downstream side of the yarn storage device 18. Tension control in the applying device 19 is facilitated. Further, since the winding unit 8 winds the yarn 20 stored in the yarn storage device 18, the winding operation can be continued without being affected by fluctuations in the unwinding tension of the yarn supplying unit 7 and the yarn joining operation. Can do.

  In addition, when a weak yarn is mixed into the package, the weak yarn may cause a yarn breakage in a warper process, which is a subsequent process of the rewinding operation by the automatic winder. If yarn breakage occurs in the warper process, it leads to a significant reduction in production efficiency, which is not preferable. Therefore, it is preferable that such weak yarn is removed during the rewinding operation of the automatic winder.

  The automatic winder of the present embodiment can apply a constant tension to the yarn to be unwound at both low speed and high speed. Therefore, a weak thread that cannot withstand the constant tension is a rubber ring. 51 and the enlargement / reduction section 50 are cut on the downstream side of the yarn path. Since the cut yarn is held in a state of being sandwiched between the rubber ring 51 and the enlargement / reduction unit 50, the yarn end is stored violently between the occurrence of yarn breakage and the stop of the yarn storage roller 32. Does not cause defects (such as sluffing and affliction). Therefore, after the yarn accumulating roller 32 is stopped, the yarn sandwiched between the rubber ring 51 and the enlargement / reduction unit 50 can be spliced with the yarn on the package side to continue the winding operation. Furthermore, it is possible to prevent yarn breakage from occurring in the warper process due to weak yarn.

  Next, a second embodiment of the present invention will be described with reference to FIG. In the following description, the same or similar components as those in the first embodiment may be denoted by the same reference numerals in the drawings, and description thereof may be omitted.

  As shown in FIG. 7, the yarn accumulating roller 32 provided in the yarn accumulating device 182 of this embodiment includes a roller main body portion 61 and an expansion / contraction moving portion 62 disposed on the unwinding side of the roller main body portion 61. ing. The expansion / contraction moving part 62 and the roller main body part 61 are connected by a spline fitting part 63. Thereby, the roller main body 61 and the expansion / contraction moving part 62 are configured to rotate integrally around the axis of the yarn accumulating roller 32 and to be relatively movable in the axial direction.

  In the roller main body 61, a yarn accumulating portion 37 is formed. Further, one end of the rubber film 52 in the axial direction is fixed to the roller main body 61 side, and the other end is fixed to the expansion / contraction moving unit 62 side by an appropriate method such as adhesion. That is, in the present embodiment, the rubber film 52 is disposed so as to be put between the roller body 61 and the expansion / contraction moving part 62.

  The yarn accumulating roller 32 of the present embodiment is configured such that the expansion / contraction moving unit 62 can be driven in the axial direction of the yarn accumulating roller 32. This will be specifically described below. In the present embodiment, the rotation drive shaft of the roller drive motor 33 is configured as a hollow shaft, and the roller body 61 is fixed to the rotation drive shaft. On the other hand, an expansion / contraction drive rod 64 is arranged inside the rotation drive shaft so that the axis line coincides with the rotation drive shaft.

  An expansion / contraction moving portion 62 is attached to the unwinding side end portion of the expansion / contraction driving rod 64 via a bearing 65. On the other hand, a feed screw 66 is formed at the proximal end of the telescopic drive rod 64. And the thread | yarn storage apparatus 182 of this embodiment is provided with the expansion-contraction drive part 67 which moves the expansion-contraction drive rod 64 to the axial direction by a feed screw mechanism. The operation of the expansion / contraction driving unit 67 is controlled by the control unit 25. With the above configuration, the expansion / contraction moving unit 62 can be moved in the axial direction of the yarn accumulating roller 32 by appropriately controlling the expansion / contraction driving unit 67.

  Thereby, since the tension | tensile_strength of the rubber film 52 spanned between the roller main-body part 61 and the expansion-contraction movement part 62 can be changed, the outer diameter of the expansion / contraction part 50 can be changed. When the expansion / contraction moving part 62 is moved in the direction in which the outer diameter of the enlargement / reduction part 50 is increased, the force with which the rubber ring 51 tightens the enlargement / reduction part 50 is increased, resulting in an increase in resistance applied to the yarn 20. can do. On the other hand, if the expansion / contraction moving part 62 is moved in the direction in which the outer diameter of the enlargement / reduction part 50 is reduced, the force with which the rubber ring 51 tightens the enlargement / reduction part 50 is weakened. can do.

  In this way, the resistance applied to the yarn 20 can be increased or decreased, so that the tension applied to the yarn on the downstream side of the yarn storage device 181 can be appropriately adjusted. Therefore, for example, the tension applied to the yarn 20 on the downstream side of the yarn accumulating device 18 can be changed at any time according to the situation by appropriately controlling the expansion / contraction driving unit 67 by the control unit 25 during the yarn winding operation.

  As described above, in the yarn accumulating device 181 of the present embodiment, the expansion / contraction drive unit 67 that expands or reduces the diameter of the expansion / reduction unit 50 is provided.

  Thereby, the tension applied to the yarn can be increased and decreased as well as constant.

  Next, a third embodiment of the present invention will be described with reference to FIG. In the following description, the same or similar components as those in the first embodiment may be denoted by the same reference numerals in the drawings, and description thereof may be omitted.

  As shown in FIG. 8, the tension applying portion 381 of the yarn accumulating device 182 of the present embodiment is disposed on the unwinding side of the yarn accumulating portion 37, and rotates in synchronization with the yarn accumulating portion 37, while the yarn accumulating portion 37. Is configured to apply tension to the yarn 20 to be unwound from. More specifically, the tension applying portion 381 is attached to the yarn accumulating roller 32 and rotates together with the yarn accumulating roller 32. The first ring rubber plate (first ring-shaped elastic body) 70 and the yarn accumulating roller 32 are provided. And a synchronous rotating member 71 that rotates in synchronism with the yarn accumulating roller 32.

  The synchronous rotating member 71 is supported by a bearing 72, and is rotatable with the yarn accumulating roller 32 and the rotating shaft coinciding with each other. Further, a magnet 73 is disposed on the yarn accumulating roller 32, and a magnet 74 is provided on the synchronous rotating member 71 so as to face the magnet 73. With this configuration, when the yarn storage roller 32 is rotationally driven by the roller drive motor 33, the synchronous rotation member 71 is configured to rotate synchronously with the yarn storage roller 32 by the magnetic force between the magnet 73 and the magnet 74. Yes.

  A second ring-shaped rubber plate (second ring-shaped elastic body) 75 is attached to the synchronous rotating member 71. More specifically, one end side of the second ring-shaped rubber plate 75 is fixed to the synchronous rotation member 71 when viewed in a cross section (see FIGS. 8 and 9) by a plane passing through the axis of the yarn accumulating roller 32. Yes. In addition, the other end side of the 2nd ring-shaped rubber plate when it sees in the said cross section is free. This free end is referred to as the free end of the second ring-shaped rubber plate 75.

  On the other hand, the first ring-shaped rubber plate 70 is attached to the outer peripheral surface of the yarn accumulating roller 32 as follows. That is, one end side of the first ring-shaped rubber plate 70 is fixed to the outer peripheral surface of the yarn accumulating roller 32 when viewed in a cross section (see FIGS. 8 and 9) by a plane passing through the axis of the yarn accumulating roller 32. . On the other hand, the other end side of the first ring-shaped rubber plate 70 when viewed in the cross section is free. This free end is called the free end of the first ring-shaped rubber plate.

  The synchronous rotating member 71 is provided with a cylindrical member 76 at a position facing the first ring-shaped rubber plate 70 on the radially outer side of the first ring-shaped rubber plate 70.

  In addition, when the rotation of the yarn accumulating roller 32 is stopped, the first ring-shaped rubber plate 70 is arranged such that the free end of the first ring-shaped rubber plate 70 is not in contact with the inner peripheral surface of the cylindrical member 76. Has been placed. Further, the second ring-shaped rubber plate 75 is arranged so that the free end of the second ring-shaped rubber plate 75 is in contact with the outer peripheral surface of the yarn storage roller 32 when the rotation of the yarn storage roller 32 is stopped.

  In the yarn storage device 182 of the present embodiment, the yarn stored in the yarn storage unit 37 is between the first ring-shaped rubber plate 70 and the inner peripheral surface of the cylindrical member 76 and the second ring-shaped rubber plate. It is configured to pass through between 75 and the outer peripheral surface of the yarn accumulating roller 32 and to be drawn out from the yarn accumulating roller 32.

  With this configuration, at the time of low speed rotation, as shown in FIG. 9, the outer circumferential surface of the yarn accumulating roller 32 and the second ring-shaped rubber plate 75 are in contact with each other. Is pulled out from the yarn accumulating roller 32 while being sandwiched between the outer peripheral surface of the yarn accumulating roller 32 and the second ring-shaped rubber plate 75. That is, during the low-speed rotation, the yarn drawn from the yarn storage roller 32 is given resistance by the outer peripheral surface of the yarn storage roller 32 and the second ring-shaped rubber plate 75.

  However, when the rotational speed of the yarn accumulating roller 32 increases, the free end of the second ring-shaped rubber plate 75 is lifted from the outer circumferential surface of the yarn accumulating roller 32 by centrifugal force, and between the outer circumferential surface of the yarn accumulating roller 32. The thread 20 cannot be pinched. Therefore, in the yarn accumulating device 182 of the present embodiment, the free end of the first ring-shaped rubber plate 70 is at the same rotational speed as the rotational speed at which the free end of the second ring-shaped rubber plate 75 is lifted from the outer peripheral surface of the yarn accumulating roller 32. The end is opened outward in the radial direction, and is configured to contact the inner peripheral surface of the cylindrical member 76.

  As described above, when the second ring-shaped rubber plate 75 comes into contact with the inner peripheral surface of the cylindrical member 76, the yarn 20 unwound from the yarn storage portion 37 is, as shown in FIG. It is pulled out from the yarn accumulating roller 32 while being sandwiched between the rubber plate 70 and the inner peripheral surface of the cylindrical member 76. That is, during high speed rotation, the yarn 20 drawn from the yarn accumulating roller is given resistance by the first ring-shaped rubber plate 70 and the inner peripheral surface of the cylindrical member 76.

  As described above, the yarn storage device 182 of the present embodiment sandwiches the yarn 20 with the second ring-shaped rubber plate 75 during low-speed rotation, and when the rotational speed increases and the centrifugal force increases, the second ring-shaped rubber plate 75 Instead, the first ring-shaped rubber plate 70 is configured to sandwich the thread 20. As described above, since the member for imparting resistance to the yarn 20 is switched according to the rotational speed, appropriate resistance can be imparted to the yarn at both high speed and low speed.

  As described above, the yarn storage device 182 of the present embodiment winds and stores the yarn around the yarn storage portion 37 formed on the outer peripheral surface of the yarn storage roller 32 and stores the yarn from the yarn storage portion 47 to the yarn storage roller 32. In this configuration, the yarn is unwound in a direction along the rotation axis, and a tension applying portion 381 is provided. The tension applying unit 381 is provided on the unwinding side of the yarn storage unit 37 and applies tension to the yarn 20 unwound from the yarn storage unit 37 while rotating in synchronization with the yarn storage unit 37. The tension applying unit 381 includes a first ring-shaped rubber plate 70, a synchronous rotating member 71, a second ring-shaped rubber plate 75, and a cylindrical member 76. The first ring-shaped rubber plate 70 is attached to the surface of the yarn accumulating roller 32. The synchronous rotating member 71 is arranged on the outer side in the radial direction of the yarn accumulating roller 32 and is configured to be able to rotate synchronously with the yarn accumulating roller 32. The second ring-shaped rubber plate 75 is provided on the synchronous rotation member 71. The cylindrical member 76 is provided on the synchronous rotating member 71 so as to face the first ring-shaped rubber plate 70 from the outside in the radial direction. When the yarn storage roller 32 is stopped, the first ring-shaped rubber plate 70 is not in contact with the cylindrical member 76, and the second ring-shaped rubber plate 75 is in contact with the surface of the yarn storage roller 32. . The yarn stored in the yarn storage portion 37 passes between the first ring-shaped rubber plate 70 and the cylindrical member 76 and between the second ring-shaped rubber plate 75 and the surface of the yarn storage roller 32. And is solved.

  With this configuration, while the yarn storage roller 32 rotates at a low speed, tension is applied to the yarn by the surface of the yarn storage roller 32 and the second ring-shaped rubber plate 75. When the yarn storage roller 32 rotates at a high speed, the second ring-shaped rubber plate 75 exerts a force in a direction away from the yarn storage roller 32 due to the centrifugal force. Therefore, the second ring-shaped rubber plate 75 applies an appropriate tension to the yarn. Can no longer be granted. However, on the other hand, in the high-speed rotation region, the first ring-shaped rubber plate 70 is pressed against the cylindrical member 76 by centrifugal force. Thereby, tension is applied to the yarn by the first ring-shaped rubber plate 70 and the cylindrical member 76 during high-speed rotation. As a result, it is possible to apply an appropriate tension to the yarn during both low-speed rotation and high-speed rotation.

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

  The elastic body is NBR, but is not limited to this, and any material having appropriate elasticity and durability can be used as the elastic body of the present invention.

  In the above-described embodiment, the concave portion maintaining mechanism 58 is configured by a plurality of concave and convex portion maintaining rings 55, 56, and 57 formed in a ring shape along the circumferential direction of the rubber film 52. However, since the rubber film 52 spreads outward by centrifugal force, the first convex portion 50a and the second convex portion 50b can be formed by the centrifugal force. That is, since the convex portions can be formed by centrifugal force without the convex portion maintaining rings 55 and 57, the convex portion maintaining rings 55 and 57 can be omitted.

  The unevenness maintaining ring portion is configured such that a ring-shaped member is disposed on the inner side of the rubber film 52. However, the present invention is not limited thereto, and a ring-shaped thick portion is formed on the inner side of the rubber film 52. The unevenness maintaining ring may be integrally formed. Further, the enlargement / reduction portion 50 may be provided with a high hardness portion capable of maintaining the concave shape and the convex shape, thereby forming and maintaining the concave portion and the convex portion.

  The control unit 25 is not limited to the configuration provided for each winder unit 2 and may be configured to control a plurality of winder units by one control unit. In the above description, a single control unit 25 is configured to control a plurality of members collectively. However, the present invention is not limited to this. For example, a control unit is provided for each member to be controlled. Also good.

  The second tension applying device 19 may be omitted. Even in this case, in the yarn accumulating device 18 of the present embodiment, the tension of the yarn unwound from the yarn accumulating roller 32 is stable regardless of the rotation speed, and thus the winding unit 8 can stably wind the yarn. Can be achieved.

  Although the control unit 25 is configured by hardware and software, a part or all of the functions may be configured by dedicated hardware.

  Although the winder unit 2 of the said embodiment is the structure which supplies the yarn supply bobbin 21 with the magazine type bobbin supply apparatus 26, it is not limited to this structure. For example, it is possible to change to a configuration in which the yarn feeding bobbin 21 is supplied to the winder unit 2 by conveying a tray on which the yarn feeding bobbin 21 is set along an appropriate path.

  In the above embodiment, the winding unit 8 is configured to traverse the yarn 20 by the traverse drum 24, but may be configured to traverse the yarn 20 by, for example, an arm type traverse mechanism.

  The automatic winder of the above embodiment is configured to blow and guide the yarn to the yarn joining device 14, but is not limited thereto, and for example, the yarn on the yarn feeding bobbin 21 and the yarn on the yarn storage roller 32 are sucked and captured. A configuration may be adopted in which the sucked and captured yarn is guided to the yarn joining device 14 by appropriate driving means.

  The configuration of the present invention can be applied not only to an automatic winder but also to other types of yarn winding devices including a yarn joining device.

18 Yarn storage device (first embodiment)
181 Yarn storage device (second embodiment)
182 Yarn storage device (third embodiment)
32 Yarn storage roller (rotating body)
37 Yarn storage part 38 Tension applying part 39 Disk member 50 Enlarging / reducing part 51 Rubber ring (ring member)
52 Rubber membrane (elastic membrane)
55, 56, 57 Concavity and convexity maintenance ring
58 Concave maintenance mechanism 70 First ring-shaped rubber film (first ring-shaped elastic body)
71 Synchronous rotating member 75 Second ring-shaped rubber film (second ring-shaped elastic body)
76 Cylindrical member

Claims (8)

A yarn storage device in which a yarn is wound around and stored in a yarn storage portion formed on the outer peripheral surface of the rotating body, and the yarn is unwound from the yarn storing portion in a direction along the rotation axis of the rotating body,
Provided on the unwinding side of the yarn storage unit, provided with a tension applying unit for applying tension to the yarn unwound from the yarn storage unit while rotating synchronously with the yarn storage unit,
The tension applying unit is
A ring member made of a stretchable elastic body;
An enlargement / reduction section that is provided on the radially inner side of the ring member and sandwiches the thread with the ring member;
Consisting of
The yarn accumulating device, wherein the enlargement / reduction unit enlarges / reduces a diameter according to a rotation speed of the rotating body. The yarn storage device according to claim 1,
The enlarging / reducing portion is formed with a recess that restricts movement of the ring member in the rotation axis direction of the rotating body,
The ring storage device, wherein the ring member is attached to the concave portion of the enlargement / reduction portion. The yarn storage device according to claim 2,
The yarn accumulating device according to claim 1, wherein the enlargement / reduction section includes a recess maintaining mechanism that maintains the recess regardless of enlargement and reduction of the diameter of the enlargement / reduction section. The yarn storage device according to claim 3,
The outer peripheral surface of the expansion / contraction part is composed of an elastic film made of a film-like elastic body,
The concave portion maintaining mechanism includes an unevenness maintaining ring portion formed along a circumferential direction of the enlargement / reduction portion,
The yarn storage device, wherein the unevenness maintaining ring portion is made of an elastic body and is disposed inside the elastic membrane. The yarn accumulating device according to any one of claims 1 to 4,
At the unwinding side end portion of the rotating body, a disk member having a diameter larger than the outer diameter of the expansion / contraction portion when the rotating body is stopped is provided,
The yarn storage device, wherein the enlargement / reduction unit is provided between the yarn storage unit and the disk member. The yarn storage device according to any one of claims 1 to 5,
A portion of the ring member that sandwiches the yarn with the enlargement / reduction portion is formed in a flat shape. The yarn accumulating device according to any one of claims 1 to 6,
A yarn accumulating device, characterized in that a drive unit for enlarging or reducing the diameter of the enlarging / reducing unit is provided. A yarn winding machine comprising the yarn storage device according to any one of claims 1 to 7 ,
In order along the running direction of the yarn,
A yarn supplying section for supplying yarn;
A yarn splicing device that connects the divided yarn ends;
The yarn storage device;
A tension applying device for applying tension to the yarn;
A winding unit for winding the yarn supplied from the yarn supplying unit to form a package;
With
The winding unit can continue winding while applying tension to the yarn unwound from the yarn storage device by the tension applying device even while the yarn joining device is performing the yarn joining operation. A yarn winding machine characterized by that.

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