JP2010174405A - Yarn end catching device and spinning machine including the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yarn end catching device that can stably reduce yarn breakage even when catching yarn having weak yarn strength, and that can also reduce consumption of air. <P>SOLUTION: A spinning machine includes a suction pipe 44 for sucking and catching a yarn end of spun yarn 10 and for guiding the yarn end to a yarn splicing device. The suction pipe 44 includes a suction passage 62 for sucking the yarn end and a twist applying nozzle 67. The twist applying nozzle 67 injects compressed air to generate whirling airflow in the suction passage 62, and thus, the twist applying nozzle can apply twists to the spun yarn 10 introduced in the suction passage 62. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention mainly relates to a yarn end catching and guiding device for catching and guiding a yarn in a spinning machine.

  Patent document 1 discloses a spinning machine provided with this kind of yarn end catching and guiding device. The spinning machine disclosed in Patent Document 1 includes a spinning device, a yarn feeding device, a winding device, and a yarn joining cart as main components.

  The yarn feeding device includes a delivery roller and a nip roller, and the spun yarn spun from the spinning device is sandwiched between the delivery roller and the nip roller, and the delivery roller is rotationally driven to feed the spun yarn to the winding device side. It is like that.

  The yarn joining cart includes a yarn joining device and a suction pipe. The suction pipe can capture and guide the yarn end discharged from the spinning device while sucking the yarn end in order to join the yarn in the yarn joining device.

  In the configuration of Patent Document 1, in a yarn splicing operation performed when starting the spinning device or when yarn breakage occurs, the yarn end is jetted from the spinning device and is nipped by the roller of the yarn feeding device. Thereafter, the yarn can be pulled downstream while applying tension to the yarn by driving the yarn feeding device, so that an actual twisted yarn can be generated by the spinning device. The tip of the suction pipe is controlled to be positioned immediately downstream of the yarn feeding device, and the yarn fed downstream by the yarn feeding device is sucked into the suction pipe and captured. Thereafter, the suction pipe guides the captured yarn to the yarn joining device, and the yarn joining is performed.

  This type of spinning machine is also disclosed in Patent Document 2. The spinning machine disclosed in Patent Document 2 is provided with a yarn feeding device (yarn feeding unit) as in Patent Document 1, and feeds the yarn between the nip roller and the delivery roller to the downstream side.

  Furthermore, in the spinning machine of Patent Document 2, a yarn accumulating device is provided on the downstream side of the yarn feeding device. This yarn accumulating device includes a yarn accumulating roller (yarn slack eliminating roller) capable of winding a yarn around the outer periphery thereof. The yarn accumulating roller is rotationally driven, and is configured to prevent loosening of the yarn that occurs at the time of yarn joining by winding and temporarily storing the spun yarn that is continuously delivered from the spinning device. .

JP 2005-202483 A JP 2004-124333 A

  Incidentally, in order to improve the spinning quality in the spinning machines as shown in Patent Documents 1 and 2, it is important to pull out from the spinning device while stably applying tension to the yarn spun from the spinning device. However, since the yarn feeding devices disclosed in Patent Documents 1 and 2 are configured to pull out the spun yarn from the spinning device by rotating the yarn while nipping the yarn, the spun yarn slips due to insufficient nip force. Occurred and caused a reduction in the spinning quality of the yarn.

  On the other hand, the yarn accumulating roller disclosed in Patent Document 2 can stably pull the spun yarn downstream by rotating with the spun yarn sufficiently wound around the outer peripheral surface. Therefore, focusing on this point, it can be considered that the yarn feeding device is omitted from the configuration of Patent Document 2 and the yarn storage device directly pulls the yarn from the spinning device. In the following description, a spinning machine having such a feature may be referred to as a delivery rollerless spinning machine.

  In this way, the spinning machine configured to directly pull out the yarn by the yarn accumulating device can pull out the spun yarn with a tension more stable than the configuration of Patent Document 2, so that it is considered that a package of uniform quality can be formed.

  However, since the delivery rollerless spinning machine omits the yarn feeding device, the yarn from the spinning device is niped by the yarn feeding device (as in Patent Document 1) during the yarn splicing operation. Cannot be generated. Accordingly, since the actual yarn does not enter into the spun yarn that is injected from the spinning device so as to be captured by the suction pipe, the yarn strength is considerably lower than in the case of Patent Document 1. As a result, when the yarn end of the spun yarn is captured by the suction pipe and guided to the yarn joining device, yarn breakage is likely to occur, and it is considered that efficiency is greatly reduced due to yarn joining mistakes.

  Moreover, although the suction pipe of patent document 1 and 2 is the structure caught by sucking in a yarn end, for this purpose, a considerable amount of air is consumed and the improvement was calculated | required from a viewpoint of energy saving.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a yarn end catching and guiding device that can satisfactorily suppress yarn breakage and reduce air consumption even when catching a yarn having weak yarn strength. It is to provide.

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, the following configuration is provided in a yarn end catching and guiding device that catches and guides a yarn end while sucking it from a suction port. That is, the yarn end catching and guiding device includes a suction passage and a twisting portion. The suction passage sucks the yarn end. The twisting portion can twist the yarn that has been introduced into the suction passage.

  Thereby, the yarn can be captured and guided while twisting the yarn introduced into the suction passage. Therefore, even when a yarn with weak yarn strength is captured, yarn breakage can be effectively avoided, and a yarn end catching error can be satisfactorily prevented.

  In the yarn end catching and guiding device, the twisting portion is preferably a twisting nozzle that forms a swirling flow in the suction passage by injecting compressed air.

  As a result, it is possible to quickly and effectively burn the yarn by generating the swirling air flow. Further, since the spun yarn takes a spiral flow in the suction passage and exhibits a spiral shape, the suction flow and the yarn in the suction passage are entangled well, and the suction force can be applied efficiently. As a result, air consumption for suction can be saved and running cost can be reduced.

  The yarn end catching and guiding device preferably has the following configuration. That is, the suction passage has a first portion connected to the suction port and a second portion connected to the downstream side of the first portion in the suction direction. The second part is configured to have a larger channel cross-sectional area than the first part. The twist nozzle nozzle is formed in the second portion.

  As a result, the swirling flow generated by the jet of compressed air from the twisting nozzle flows smoothly in a spiral manner in the second portion toward the downstream side in the suction direction. Therefore, since the yarn can be sucked smoothly, the yarn can be captured and guided more reliably.

  The yarn end catching and guiding device preferably has the following configuration. That is, the yarn end catching and guiding device includes a drawing nozzle that injects compressed air toward the downstream side in the suction direction into the suction passage. The drawing nozzle is arranged at a position farther than the twisting nozzle as viewed from the suction port.

  Thus, the yarn is sent to the downstream side while being spiraled on the swirling flow of the twisting nozzle, and the air flow from the drawing nozzle acts on the spiraled portion. Therefore, since a strong pulling action is obtained, the air consumption for suction can be further reduced.

  According to a second aspect of the present invention, a spinning machine having the following configuration is provided. That is, the spinning machine includes the yarn end catching and guiding device, the spinning device, and the winding device. The spinning device can generate spun yarn by pneumatic spinning and send it out from the spinning outlet. The winding device forms a package by winding the yarn spun by the spinning device onto a bobbin. The yarn end catching and guiding device is configured so that the spun yarn sent out from the spinning outlet can be directly sucked into the suction passage.

  That is, the spun yarn immediately after the spinning device starts spinning is not twisted on the downstream side, so that the actual twist does not enter, and the yarn strength is lower than usual. In this respect, according to the above configuration, even when a spun yarn having a low yarn strength is directly sucked, the yarn can be sucked while increasing the yarn strength by additional twisting. Can be captured and guided.

  The spinning machine preferably has the following configuration. That is, the spinning machine includes a yarn joining device for joining the yarn on the spinning device side and the yarn on the package side. The yarn end catching and guiding device is configured to catch the yarn end of the spun yarn and guide it to the yarn joining device.

  Thereby, in the yarn joining operation by the yarn joining device, failures due to yarn breakage can be reduced, and the operating efficiency of the spinning machine can be improved.

  The spinning machine preferably has the following configuration. That is, the spinning machine includes a doffing device that removes a full-package and replaces it with an empty bobbin so that the yarn is wound around the empty bobbin. The yarn end catching and guiding device is configured to catch the yarn end of the spun yarn and guide it to the empty bobbin.

  Thereby, in the doffing operation by the doffing device, failure due to yarn breakage can be reduced, and the operating efficiency of the spinning machine can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS The front view which showed the whole structure of the spinning machine which concerns on one Embodiment of this invention. The longitudinal cross-sectional view of a spinning machine. The longitudinal cross-sectional view of a thread | yarn storage apparatus. The longitudinal cross-sectional view which showed a mode that the upper thread | yarn and the lower thread | yarn were caught with the suction pipe and the suction mouth. The expanded sectional view which shows the structure of the front-end | tip part of a suction pipe.

  Next, a spinning machine (spinning machine) according to an embodiment of the present invention will be described with reference to the drawings. In the present specification, “upstream” and “downstream” mean upstream and downstream in the traveling direction of the yarn during spinning. FIG. 1 is a front view showing the overall configuration of the spinning machine 1, and FIG. 2 is a longitudinal sectional view of the spinning machine 1.

  A spinning machine 1 as a spinning machine shown in FIG. 1 includes a large number of spindles (spinning unit 2) arranged side by side. The spinning machine 1 includes a yarn joining cart 3, a doffing cart 4, a blower box 80, and a prime mover box 5.

  As shown in FIG. 1, each spinning unit 2 includes a draft device 7, a spinning device 9, a yarn storage device 12, and a winding device 13 as main components in order from upstream to downstream. Yes. The draft device 7 is provided in the vicinity of the upper end of the frame 6 provided in the spinning machine 1, and the fiber bundle 8 sent from the draft device 7 is configured to be spun by the spinning device 9. The spun yarn 10 delivered from the spinning device 9 passes through a yarn clearer 52, which will be described later, and further passes through the yarn accumulating device 12 and is wound by the winding device 13, whereby a package 45 is formed.

  The draft device 7 is for drawing the sliver 15 into the fiber bundle 8. As shown in FIG. 2, the draft device 7 includes four rollers: a back roller 16, a third roller 17, a middle roller 19 to which an apron belt 18 is attached, and a front roller 20.

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

  A yarn accumulating device 12 is provided downstream of the spinning device 9. The yarn storage device 12 retains the spun yarn 10 supplied from the spinning device 9 at the time of yarn splicing by the yarn splicing carriage 3 and the function of applying a predetermined tension to the spun yarn 10 and pulling it out from the spinning device 9. And the function of adjusting the tension so that the fluctuation of the tension on the winding device 13 side is not transmitted to the spinning device 9 side. As shown in FIG. 2, the yarn storage device 12 includes a yarn storage roller 21, a yarn hooking member 22, an upstream guide 23, an air cylinder 24, an electric motor 25, and a downstream guide 26. Yes.

  The yarn hooking member 22 is configured to be able to engage (hang) with the spun yarn 10, and rotates integrally with the yarn accumulating roller 21 while being engaged with the spun yarn 10. The spun yarn 10 can be guided to the outer peripheral surface of the roller 21.

  The yarn storage roller 21 is configured so that the spun yarn 10 can be wound around and stored on the outer peripheral surface thereof. The yarn accumulating roller 21 is rotationally driven by the electric motor 25 at a constant rotational speed. With this configuration, the spun yarn 10 guided to the outer peripheral surface of the yarn accumulating roller 21 by the yarn hooking member 22 is wound so as to tighten the yarn accumulating roller 21 as the yarn accumulating roller 21 rotates, and the yarn accumulating device. The spun yarn 10 upstream of 12 is pulled. Thereby, the spun yarn 10 can be continuously pulled out from the spinning device 9.

  The upstream guide 23 is disposed slightly upstream of the yarn accumulating roller 21. The upstream guide 23 is configured as a guide member that appropriately guides the yarn with respect to the outer circumferential surface of the yarn accumulating roller 21, and the twist of the spun yarn 10 propagated from the spinning device 9 is the upstream guide 23. It also serves as a twist-preventing member that prevents it from being transmitted downstream. Further, the upstream guide 23 is attached to an air cylinder 24 and is configured to be appropriately moved by driving the air cylinder 24.

  The downstream guide 26 is disposed slightly downstream of the yarn accumulating roller 21. The downstream guide 26 is configured as a guide member that regulates the trajectory of the spun yarn 10 swung around by the rotating yarn hooking member 22 and guides the spun yarn 10 by stabilizing the traveling path of the downstream yarn. Yes.

  A yarn clearer 52 is provided on the front side of the frame 6 of the spinning machine 1 and at a position between the spinning device 9 and the yarn storage device 12. The spun yarn 10 spun by the spinning device 9 passes through the yarn clearer 52 before being wound by the yarn accumulating device 12. The yarn clearer 52 is configured to monitor the thickness of the traveling spun yarn 10 and transmit a yarn defect detection signal to a unit controller (not shown) when a yarn defect of the spun yarn 10 is detected.

  As shown in FIGS. 1 and 2, the yarn joining cart 3 includes a splicer (yarn joining device) 43, a suction pipe (yarn end catching and guiding device) 44, and a suction mouth 46. The yarn joining cart 3 is configured to run on the rail 41 fixed to the frame 6 to the spinning unit 2 when the yarn breakage or yarn cutting occurs in a certain spinning unit 2, and stop to perform yarn joining. ing.

  The suction pipe 44 is rotatable up and down around an axis, and is configured to suck and capture the yarn end (upper yarn) fed from the spinning device 9 and guide it to the splicer 43. . The suction mouse 46 is pivotable in the vertical direction about the axis so that the yarn end (lower yarn) is sucked and captured from the package 45 supported by the winding device 13 and can be guided to the splicer 43. It is configured. Although a detailed configuration of the splicer 43 is omitted, the splicer 43 is configured to splice the upper yarn and the lower yarn by twisting the yarn ends together by a swirling air flow.

  The winding device 13 includes a cradle arm 71 supported so as to be swingable around a support shaft 70. The cradle arm 71 can rotatably support a bobbin 48 around which the spun yarn 10 is wound.

  The winding device 13 includes a winding drum 72 and a traverse device 75. The take-up drum 72 is configured to be able to be driven in contact with the outer peripheral surface of the package 45 formed by winding the bobbin 48 and the spun yarn 10 thereon. The traverse device 75 includes a traverse guide 76 that can be engaged with the spun yarn 10. In this configuration, the winding drum 72 is driven by an electric motor (not shown) while the traverse guide 76 is reciprocated by a driving means (not shown), thereby rotating the package 45 in contact with the winding drum 72 and spinning the yarn 10. It is designed to wind up while traversing.

  The doffing cart 4 includes a doffing device 61 as shown in FIGS. 1 and 2. The doffing device 61 includes a cradle operation arm 90, a suction pipe 88, and a bunch winding arm 91. The doffing cart 4 is configured to travel to the spinning unit 2 on the traveling path 86 formed in the frame 6 and stop when the package 45 becomes full with a certain spinning unit 2.

  The cradle operation arm 90 is configured to be able to operate the cradle arm 71 of the winding device 13. The suction pipe 88 is configured to be able to expand and contract, and is configured to be able to capture the yarn end discharged from the spinning device 9 while sucking and guide it to an empty bobbin 48 attached to the winding device 13. The bunch winding arm 91 can fix the spun yarn 10 to the bobbin 48 by winding the yarn around the bobbin 48.

  Next, a detailed configuration of the yarn storage device 12 will be described with reference to FIGS. 2 and 3. FIG. 3 is a longitudinal sectional view of the yarn accumulating device 12.

  The yarn storage roller 21 is a roller member made of a material having wear resistance, and is fixed to the motor shaft 25a of the electric motor 25. The outer peripheral surface 21a of the yarn accumulating roller 21 has a proximal-side taper portion in order from the proximal end to the distal end, assuming that the side having the yarn hooking member 22 is the distal end and the side on which the electric motor 25 is disposed is the proximal end. 21b, a cylindrical portion 21c, and a tip side taper portion 21d.

  The cylindrical portion 21c is configured to have a shape in which the tip end side is slightly narrowed, and has a shape that is continuous to the tapered portions 21b and 21d on both sides without a step.

  The proximal end side taper portion 21b and the distal end side taper portion 21d are each configured to have a gentle taper shape with the end face side being the larger diameter side. In the outer peripheral surface 21a of the yarn accumulating roller 21, the proximal end side taper portion 21b smoothly moves the supplied spun yarn 10 from the large diameter portion toward the small diameter portion to reach the intermediate cylindrical portion 21c. The spun yarn 10 is configured to be wound around the surface of the cylindrical portion 21c in an orderly manner. Further, the tip-side taper portion 21d prevents a loop-out phenomenon in which the wound spun yarn 10 comes off at the same time during unwinding, and simultaneously feeds the spun yarn 10 from the small diameter portion to the large diameter portion on the end surface side. And has a function of ensuring a smooth drawing of the spun yarn 10.

  The yarn hooking member 22 disposed on the front end side of the yarn accumulating roller 21 is disposed with its axis aligned with the yarn accumulating roller 21 as shown in FIG. The yarn hooking member 22 includes a flyer shaft 33 and a fryer 38 fixed to the tip thereof.

  The flyer shaft 33 is supported so as to be rotatable relative to the yarn accumulating roller 21. On the other hand, a permanent magnet is attached to either the flyer shaft 33 or the yarn accumulating roller 21, and a magnetic hysteresis material is attached to the other. These magnetic means are configured to generate a torque that resists the yarn hooking member 22 from rotating relative to the yarn accumulating roller 21. With this resistance torque, the yarn hooking member 22 rotates following the rotation of the yarn accumulating roller 21, and as a result, both can be rotated together. On the other hand, when a force that overcomes the resistance torque is applied to the yarn hooking member 22, the yarn hooking member 22 rotates relative to the yarn accumulating roller 21.

  The flyer 38 is appropriately curved toward the outer peripheral surface 21a of the yarn accumulating roller 21, and is configured to be able to engage with the spun yarn 10 (to hook the spun yarn 10). When the flyer 38 rotates integrally with the yarn storage roller 21 in a state where no yarn is wound around the yarn storage roller 21, the flyer 38 engages with the spun yarn 10. Then, the spun yarn 10 engaged with the rotating flyer 38 is swung around by the flyer 38 and guided and wound around the outer peripheral surface of the rotating yarn storage roller 21.

  The state of the spun yarn 10 wound around the yarn accumulating roller 21 will be described as follows. That is, the spun yarn 10 that has passed through the upstream guide 23 is guided to the outer peripheral surface 21a from the base end side, and is wound around the cylindrical portion 21c a plurality of times. Then, the spun yarn 10 drawn from the front end side of the outer peripheral surface 21 a passes through the flyer 38 and then is sent downstream through the downstream guide 26.

  As shown in FIG. 2, when the spun yarn 10 is wound around the yarn accumulating roller 21 and a force for pulling the spun yarn 10 engaged with the flyer 38 is applied to the downstream side, the yarn is accumulated from the tip of the yarn accumulating roller 21. A force for rotating the yarn hooking member 22 so as to unwind the yarn 10 is applied to the fryer 38. Therefore, if the yarn tension on the downstream side of the yarn accumulating device 12 (the yarn tension between the yarn accumulating device 12 and the winding device 13) is large enough to overcome the resistance torque, the yarn hooking member 22 becomes independent of the yarn accumulating roller 21. The spun yarn 10 is gradually unwound from the front end side of the yarn accumulating roller 21 through the flyer 38.

  Conversely, when the yarn tension on the downstream side of the yarn accumulating device 12 is not strong enough to overcome the resistance torque, the yarn hooking member 22 rotates integrally with the yarn accumulating roller 21. In this case, the yarn hooking member 22 functions to prevent the spun yarn 10 from being unwound from the leading end side of the rotating yarn accumulating roller 21.

  Thus, the yarn storage device 12 operates to unwind the yarn when the downstream yarn tension increases, and to stop the yarn unwinding when the yarn tension decreases (yarn seems to loosen). Thus, the slack of the yarn can be eliminated and an appropriate tension can be applied. Further, the yarn hooking member 22 operates so as to absorb the fluctuation of the tension applied to the spun yarn 10 between the yarn accumulating device 12 and the winding device 13 as described above. Can be prevented from affecting the spun yarn 10 between the yarn storage device 12 and the yarn storage device 12. With the yarn storage device 12 configured as described above, the spun yarn 10 can be pulled out from the spinning device 9 at a more stable speed.

  Since the yarn storage roller 21 is rotationally driven at a predetermined speed, the spun yarn 10 is wound around the proximal end side of the yarn storage roller 21 at a predetermined speed. Therefore, when the speed at which the spun yarn 10 is unwound from the leading end side of the yarn accumulating roller 21 is faster than the speed at which the spun yarn 10 is wound around the base end side, the yarn storage amount decreases, and when the spun yarn 10 is not unwound from the leading end side. Yarn accumulation gradually increases.

  As described above, the upstream guide 23 is configured to be movable between the advanced position and the retracted position by the air cylinder 24. When the upstream guide 23 is in the advanced position (the position indicated by the solid line in FIG. 3), the yarn path is adjusted so that the spun yarn 10 does not engage with the yarn hooking member 22 of the yarn storage device 12. It is held by the upstream guide. On the other hand, when the upstream guide 23 is moved to the retracted position (the position of the chain line in FIG. 3), the yarn path reaches the position where the spun yarn 10 is engaged with the yarn hooking member 22 and wound around the yarn accumulating roller 21. Is configured to move.

  Next, the yarn splicing operation in the spinning machine 1 of the present embodiment will be described with reference to FIG. FIG. 4 is a longitudinal sectional view showing a state in which the upper thread and the lower thread are captured by the suction pipe 44 and the suction mouth 46.

  First, when the yarn clearer 52 detects a yarn defect during winding of the spun yarn 10, the yarn clearer 52 transmits a yarn defect detection signal to the unit controller. Upon receipt of the yarn defect detection signal, the unit controller immediately cuts the spun yarn 10 with the cutter 57, and further stops the draft device 7, the spinning device 9, and the like. At this time, the yarn downstream of the cutting position is temporarily wound around the package 45 by the winding device 13. As a result, the spun yarn 10 that has been wound on the yarn accumulating roller 21 is also wound on the package 45, and no yarn is left on the yarn accumulating roller 21. Note that the portion including the yarn defect is once wound around the package 45.

  Next, the unit controller sends a control signal to the yarn splicing carriage 3 and travels to the front of the spinning unit 2 to start the yarn splicing operation. First, the unit controller rotates the suction mouse 46 to the vicinity of the surface of the package 45 (see FIG. 4), generates a suction flow, and reversely rotates the package 45 by the winding device 13. As a result, the yarn end (lower yarn) is pulled out from the outer peripheral surface of the package 45 and is sucked and captured by the suction mouse 46. At this time, the yarn including the yarn defect can be removed from the package 45 by drawing the yarn including the yarn defect from the package 45 and sucking it by the suction mouth 46.

  Subsequently, while the package 45 is rotated in the reverse direction, the suction mouth 46 is rotated upward in a state where the lower thread is sucked to guide the lower thread to the splicer 43. When the lower thread is guided to the splicer 43, the rotation of the package 45 is stopped.

  Further, before and after the rotation operation of the suction mouse 46, the unit controller rotates the suction pipe 44 to the vicinity of the downstream side of the spinning device 9, as shown in FIG. The unit controller then drives the spinning device 9 and the like again to resume spinning and generates a suction flow in the suction pipe 44 to capture the yarn end (upper yarn) on the spinning device 9 side. The detailed configuration of the suction pipe 44 will be described later.

  Subsequently, the suction pipe 44 is rotated downward from the state shown in FIG. 4 while continuing the suction, so that the spun yarn 10 is drawn from the spinning device 9 and guided to the splicer 43. At this time, the unit controller drives the air cylinder 24 to move the upstream guide 23 to the advanced position (solid line position in FIG. 3). As a result, the yarn end can be guided to the splicer 43 while the spun yarn 10 is not engaged with the rotating flyer 38.

  The reason why the upstream guide 23 is raised is as follows. That is, the suction force of the suction pipe 44 is not strong enough to overcome the resistance torque of the yarn hooking member 22. Therefore, with the suction force of the suction pipe 44, the spun yarn 10 cannot be unwound from the yarn accumulating roller 21 via the yarn hooking member 22. For this reason, if winding of the yarn around the yarn accumulating roller 21 starts before the yarn end is guided to the splicer 43, the suction pipe 44 cannot pull the upper yarn any more. The splicer 43 cannot be guided and the splicing fails. Therefore, the upstream guide 23 is raised until the suction pipe 44 finishes guiding the upper yarn to the splicer 43, so that the winding of the spun yarn 10 onto the yarn accumulating roller 21 is prevented. It has become.

  In FIG. 4, the suction pipe 44 and the suction mouth 46 are depicted as performing a pivoting operation at the same time, but the timing of the pivoting operation may be mixed.

  When the guidance of the upper thread to the splicer 43 is completed, the control for quickly moving the upstream guide 23 to the retracted position is performed. As a result, the spun yarn 10 is engaged with the fryer 38 and winding of the spun yarn 10 around the yarn accumulating roller 21 is started. That is, winding by the winding device 13 is stopped during the yarn splicing operation, but the spun yarn 10 is continuously sent out from the spinning device 9 during this time, so that the spun yarn 10 is left as it is. Loose threads will occur. Therefore, in the present embodiment, the spun yarn 10 is wound around the yarn accumulating roller 21 in the yarn accumulating device 12, so that the slack of the spun yarn 10 can be prevented. Thus, the yarn storage device 12 functions as a yarn slack eliminating device at the time of yarn joining.

  When the yarn end is guided to the splicer 43 by the suction pipe 44, the splicing of the yarn ends by the splicer 43 starts immediately. When the piecing is completed, the unit controller resumes the winding of the spun yarn 10 by the winding device 13.

  Next, the detailed structure of the front-end | tip part of the suction pipe 44 with which the yarn splicing cart 3 is provided is demonstrated. FIG. 5 is an enlarged cross-sectional view showing the configuration of the tip of the suction pipe 44. 5 shows a state in which the suction pipe 44 is rotated as shown in FIG. 4 and the tip thereof is located on the downstream side of the spinning device 9. The spinning device 9 is provided with a spinning outlet 9a for sending the spun yarn downstream, and when the suction pipe 44 is rotated upward as shown in FIG. 4, the tip of the spinning device is as shown in FIG. The position substantially faces the spinning outlet 9a.

  As shown in FIG. 5, an elongated nozzle member 44 a is fixed to the tip of the suction pipe 44. The nozzle member 44a is formed in a cylindrical shape, and a suction passage 62 having a circular cross section is formed therein. One end of the suction passage 62 is connected to a suction port 63 formed on the front end surface of the nozzle member 44a.

  The suction passage 62 has a stepped shape having a small diameter portion (first portion) 64 formed in a portion close to the suction port 63 and a large diameter portion (second portion) 65 connected to the small diameter portion 64. It is configured as a passage. Therefore, the flow passage cross-sectional area of the large diameter portion 65 is larger than the flow passage cross sectional area of the small diameter portion 64. An annular first air chamber 68 and second air chamber 69 are formed inside the nozzle member 44 a so as to surround the suction passage 62. A compressed air pipe 55 is connected to the two air chambers 68 and 69, and compressed air can be supplied to the air chambers 68 and 69 from a compressed air source (not shown).

  An ejector nozzle (retraction nozzle) 66 for injecting compressed air into the suction passage 62 is connected to the first air chamber 68. The ejector nozzle 66 is formed as a ring-shaped nozzle having a triangular cross-section, and the cross-sectional contour thereof is formed so as to gradually become narrower as it approaches the inner suction passage 62. And the front-end | tip of the ejector nozzle 66 forms the jet nozzle in the inner wall of the suction passage 62 (large diameter part 65), and it is comprised so that air can be ejected toward this suction passage 62 from this jet nozzle.

  The ejection port of the ejector nozzle 66 is formed in a ring shape, and air is ejected over the entire circumference. Further, the ejector nozzle 66 is disposed with an appropriate inclination so that an oblique air flow toward the proximal end of the suction pipe 44 can be formed. With this configuration, air is injected from the first air chamber 68 to the suction passage 62 through the ejector nozzle 66 at a high speed, thereby causing a pressure drop due to a known Venturi effect (ejector effect), and the proximal end of the suction pipe 44. A suction flow toward the side can be applied to the suction port 63.

  A plurality of twisting nozzles 67 for injecting compressed air into the suction passage 62 are connected to the second air chamber 69. The twisting nozzles 67 are arranged around the suction passage 62 at equal intervals, and each form a spout on the inner wall of the suction passage 62. For convenience of explanation by the cross-sectional view, the twisting nozzle 67 is drawn so as to extend in the radial direction in FIG. 5, but the actual direction of the twisting nozzle 67 is the tangential direction of the circular suction passage 62. It has become.

  With this configuration, a swirling air flow is generated in the suction passage 62 by injecting compressed air from the second air chamber 69 to the suction passage 62 through the twisting nozzle 67. Accordingly, the spun yarn 10 introduced into the suction passage 62 is drawn to the base side of the suction pipe 44 while being twisted by the action of the swirling airflow generated at the portion of the twisting nozzle 67.

  Here, at the time of yarn joining, the yarn spun from the spinning device 9 is insufficiently twisted than usual, and the yarn strength is reduced. Therefore, if the spun yarn 10 is simply sucked strongly by the suction pipe 44, for example, the spun yarn 10 is easily cut off due to friction with the suction port 63 or the inner wall of the suction passage 62, causing frequent splicing mistakes. End up.

  In this respect, in the configuration of the present embodiment, the swirling air flow generated in the suction passage 62 by the twisting nozzle 67 acts to further twist the spun yarn 10. By this additional twisting effect, the spun yarn 10 can be sucked into the suction pipe 44 while increasing the yarn strength, so that yarn breakage can be effectively prevented and the yarn joining operation can be performed smoothly.

  The twist nozzle 67 is arranged along a virtual plane perpendicular to the longitudinal direction of the suction passage 62. However, the opening of the twisting nozzle 67 is formed in the large-diameter portion 65 of the suction passage 62, and a step 85, which is a connection portion between the large-diameter portion 65 and the small-diameter portion 64, is formed at the front end side of the opening. Has been. Therefore, even if the compressed air injected from the twist nozzle 67 tries to flow toward the tip end side (suction port 63 side) of the suction pipe 44, most of the flow is blocked by the step 85. As a result, the compressed air injected from the twisting nozzle 67 flows to the base of the suction pipe 44 while turning spirally.

  With the above configuration, the spun yarn 10 introduced into the suction passage 62 from the suction port 63 of the nozzle member 44a is subjected to additional twisting by the swirling air flow from the twisting nozzle 67 as described above, and at the same time, It is swung in a spiral on the flow. Accordingly, the spun yarn 10 has a spiral shape, and the suction flow generated by the injection of air from the ejector nozzle 66 is well entangled with the spun yarn 10. Therefore, the spun yarn 10 is efficiently sucked into the suction pipe 44. Can do. Therefore, even if the injection amount of compressed air is reduced as compared with the conventional case, the same suction action can be realized, so that the consumption amount of compressed air can be saved and the running cost can be reduced. According to the calculation of the present inventor, by adopting the configuration of the present embodiment, even if the consumption of compressed air related to the suction pipe 44 is reduced by about 40% to 50% compared to the conventional case, It was found that the same or better capture performance can be obtained.

  As described above, the suction pipe 44 of the yarn splicing carriage 3 included in the spinning machine 1 of the present embodiment includes the suction passage 62 and the twisting nozzle 67. The suction passage 62 sucks the yarn end of the spun yarn 10. The twisting nozzle 67 can twist the spun yarn 10 that has been introduced into the suction passage 62.

  Thereby, the spun yarn 10 introduced into the suction passage 62 can be twisted to improve the yarn strength, and the spun yarn 10 can be captured and guided. Therefore, even when a yarn with weak yarn strength is captured, yarn breakage can be effectively avoided, and a yarn end catching error can be satisfactorily prevented.

  Further, in the suction pipe 44, the twisting nozzle 67 is configured to form a swirling flow in the suction passage 62 by injecting compressed air.

  Thereby, twisting with respect to the spun yarn 10 can be performed quickly and effectively by generating the swirling air flow. Further, since the spun yarn 10 takes a swirl flow in the suction passage 62 and has a spiral shape, the suction flow in the suction passage 62 and the yarn are entangled well, and the suction force can be applied efficiently. As a result, air consumption for suction can be saved and running cost can be reduced.

  Further, in the suction pipe 44, the suction passage 62 includes a small diameter portion 64 connected to the suction port 63 opened to the outside, and a large diameter portion 65 connected to the downstream side of the small diameter portion 64 in the suction direction. Have The large diameter portion 65 is configured to have a larger channel cross-sectional area than the small diameter portion 64. The injection port of the twisting nozzle 67 is formed in the large diameter portion 65.

  As a result, the swirl flow generated by the jet of compressed air from the twisting nozzle 67 smoothly flows spirally through the large diameter portion 65 toward the downstream side in the suction direction. Therefore, since the spun yarn 10 can be sucked smoothly, the yarn can be captured and guided more reliably.

  The suction pipe 44 includes an ejector nozzle 66 that injects compressed air toward the downstream side in the suction direction into the suction passage 62. The ejector nozzle 66 is disposed at a position farther from the twisting nozzle 67 when viewed from the suction port 63.

  Thereby, the spun yarn 10 is sent to the downstream side of the suction passage 62 while being spiraled on the swirl flow generated by the twisting nozzle 67, and the air flow from the ejector nozzle 66 is fed to the spiraled portion. Will work. Therefore, since a strong pulling action is obtained, the air consumption for suction can be further reduced.

  The spinning machine 1 of the present embodiment includes the suction pipe 44, the spinning device 9, and the winding device 13. The spinning device 9 can generate spun yarn by pneumatic spinning and send it out from the spinning outlet 9a. The winding device 13 forms the package 45 by winding the yarn spun by the spinning device 9 around the bobbin 48. As shown in FIG. 5, the suction pipe 44 is configured so that the spun yarn 10 fed from the spinning outlet 9 a can be directly sucked into the suction passage 62.

  That is, the spun yarn 10 immediately after the spinning device 9 starts spinning for yarn splicing work or the like is not twisted on the downstream side, so that actual twist does not enter and the yarn strength is lower than usual. It has become. In this regard, according to the configuration of the present embodiment, even when the spun yarn 10 having a weak yarn strength is directly sucked as shown in FIG. 5, the yarn strength is increased by the additional twisting action by the twisting nozzle 67. Therefore, the spun yarn 10 can be reliably captured and guided while appropriately preventing yarn breakage.

  Further, the spinning machine 1 of the present embodiment includes a splicer 43 for splicing the spun yarn 10 (upper yarn) on the spinning device 9 side and the spun yarn 10 (lower yarn) on the package 45 side. The suction pipe 44 is configured to capture the yarn end of the spun yarn 10 and guide it to the splicer.

  Thereby, the failure due to yarn breakage in the yarn splicing work by the splicer 43 can be reduced, and the operation efficiency of the spinning machine 1 can be improved.

  Note that the configuration in which the spun yarn 10 is twisted inside the suction passage 62 is not limited to the suction pipe 44 of the yarn splicing carriage 3, but may be applied to the suction pipe 88 provided in the doffing device 61 of the doffing carriage 4. it can. Hereinafter, the doffing work performed by the doffing cart 4 will be described.

  When the sensor 45 (not shown) detects that the package 45 of a spinning unit 2 is full, the unit controller stops the spinning device 9. At almost the same time, the unit controller controls the cradle arm 71 to turn to the left in FIG. 2 in the winding device 13 to release the full package 45 from the winding drum 72 and stop the rotation. .

  The doffing cart 4 appropriately operates the cradle arm 71 by the cradle operating arm 90 and removes the full-wrapped package 45 from the cradle arm 71 by a package removing means (not shown). The removed full-package 45 rolls on the inclined floor 94 formed in the doffing cart 4 and then falls to the shelf 96 formed in a groove shape and stops still. Next, the empty bobbin 48 is set on the cradle arm 71 by an unillustrated empty bobbin supplying means provided in the doffing cart 4.

  Next, the unit controller of the spinning unit 2 resumes driving of the draft device 7 and the spinning device 9. At substantially the same time, the suction pipe 88 is extended upward. The suction pipe 88 captures the yarn end of the spun yarn 10 discharged from the spinning device 9 by suction, and then guides the yarn end to the vicinity of the empty bobbin 48. Subsequently, bunch winding is performed by the bunch winding arm 91, and the yarn end is attached to the empty bobbin 48. Through the series of operations described above, the spun yarn 10 spun by the spinning device 9 can be wound by the winding device 13.

  After resuming the driving of the spinning device 9, the unit controller moves the upstream guide 23 to the retracted position by the air cylinder 24. Thereby, since the spun yarn 10 is wound around the yarn accumulating roller 21, it is possible to prevent loosening of the yarn during the doffing operation.

  When the bunch winding operation is completed, the doffing carriage 4 rotates the cradle arm 71 to the right in FIG. 2 by the cradle operating arm 90, and the bobbin 48 after the bunch winding is brought into contact with the winding drum 72 to wind the yarn. Start taking. As a result, a winding tension is applied to the spun yarn 10 and the spun yarn 10 is gradually unwound from the yarn accumulating roller 21.

  As shown above, the doffing device 61 removes the full package 45 from the winding device 13 and replaces it with the empty bobbin 48 so that the yarn is wound around the empty bobbin 48. I do. In this doffing operation, a configuration including the twist nozzle 67 and the like can be applied to the suction pipe 88 that captures the yarn end of the spun yarn 10 and guides it to the empty bobbin 48.

  In this case, in the doffing operation by the doffing device 61, failure due to yarn breakage can be reduced, and the operation efficiency of the spinning machine 1 can be improved.

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

  The configuration of the above embodiment is a so-called delivery rollerless spinning machine in which the yarn feeding device disclosed in Patent Documents 1 and 2 is omitted. However, the above-described configuration of the suction pipe 44 can also be applied to a spinning machine including a yarn feeding device as shown in Patent Documents 1 and 2.

  Patent Document 1 discloses a configuration in which a yarn end of a spun yarn ejected from a spinning device is landed on a delivery roller of a yarn feeding device, and the spun yarn is nipped between the delivery roller and the nip roller by the rotation of the delivery roller. Yes. However, in this configuration, the yarn is often not conveyed to the downstream side well, and the spun yarn may be wound around the nip roller or the delivery roller. Therefore, in order to avoid the winding of the yarn to the yarn feeding device, a mechanism capable of separating the nip roller from the delivery roller is provided, and the yarn end of the spun yarn ejected from the spinning device is not niped by the yarn feeding device. A configuration in which the material is conveyed downstream and is captured by a suction pipe is conceivable. In this case, since a nip in the yarn feeding device cannot be obtained, a real twisted spun yarn cannot be generated by the spinning device, but by providing a configuration for additional twisting as in the above embodiment on the suction pipe side, It is considered that yarns with low yarn strength can be captured well.

  For example, two or more ejector nozzles 66 and twisting nozzles 67 may be arranged instead of being arranged one by one.

  The ejector nozzle 66 can be changed so as to be disposed closer to the suction port 63 (upstream in the suction direction) than the twisting nozzle 67.

  The twisting nozzle 67 can be configured so as to be appropriately inclined from a plane perpendicular to the suction passage 62, and the twisting nozzle 67 can be changed to have a role as an ejector nozzle.

1 Spinning machine (spinning machine)
9 Spinning device 9a Spinning exit 13 Winding device 43 Splicer (yarn splicing device)
61 Doffing device 44 Suction pipe (yarn end catching and guiding device)
62 Suction passage 63 Suction port 66 Ejector nozzle (retraction nozzle)
67 Twisted nozzle

Claims (7)

A yarn end catching and guiding device for catching and guiding a yarn end while sucking from a suction port,
A suction passage for sucking the yarn end;
A twisting portion capable of twisting the yarn in the state introduced into the suction passage;
A yarn end catching and guiding device comprising: The yarn end catching and guiding device according to claim 1,
The yarn end catching and guiding device, wherein the twisting portion is a twisting nozzle that forms a swirl flow in the suction passage by injecting compressed air. The yarn end catching and guiding device according to claim 2,
The suction passage has a first part connected to the suction port, and a second part connected to the downstream side in the suction direction of the first part,
The second part is configured to have a larger flow path cross-sectional area than the first part,
The yarn end catching and guiding device, wherein the twist nozzle nozzle is formed in the second portion. The yarn end catching and guiding device according to claim 2 or 3,
A suction nozzle that injects compressed air toward the downstream side in the suction direction into the suction passage;
The yarn end catching and guiding device, wherein the drawing nozzle is disposed at a position farther than the twisting nozzle as viewed from the suction port. The yarn end catching and guiding device according to any one of claims 1 to 4,
A spinning device capable of generating spun yarn by air spinning and sending it out from the spinning outlet;
A winding device for winding a yarn spun by the spinning device onto a bobbin to form a package;
With
The spinning machine according to claim 1, wherein the yarn end catching and guiding device is configured to be able to directly suck the spun yarn fed from the spinning outlet into the suction passage. The spinning machine according to claim 5,
A yarn joining device for joining the yarn on the spinning device side and the yarn on the package side;
The spinning machine characterized in that the yarn end catching and guiding device is configured to catch a yarn end of a spun yarn and guide it to the yarn joining device. The spinning machine according to claim 5,
It is equipped with a doffing device that removes a full package and replaces it with an empty bobbin so that the yarn can be wound around the empty bobbin.
The spinning machine is characterized in that the yarn end catching and guiding device is configured to catch a yarn end of a spun yarn and guide it to the empty bobbin.

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