JP2017053051A - Yarn winding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a configuration capable of easily removing a removable material deposited on a filter member using a suction flow generated by a main blower and reducing a load of the main blower in a yarn winding machine including a section duct, a section blower, a main duct, and the main blower.SOLUTION: A fine spinning machine includes: a spinning unit; a section duct 31; a section blower 32; a filter member 33; a main duct 37; a main blower; and a section blower control section 39. The section blower control section 39 performs deceleration control in which rotational speed of a blade 32a provided in the section blower 32 is temporarily lowered while maintaining a state that the rotation of the blade 32a is continued and the blade 32a is continued to rotate.SELECTED DRAWING: Figure 3

Description

  The present invention mainly relates to a yarn winding machine having a configuration for removing fluff and yarn waste.

  Since the yarn winding machine processes fiber bundles and / or yarns, unnecessary fluff and yarn waste (removed substances) are generated during operation. If this removed substance is left unattended, the removed substance adheres to the package or the like and the quality of the package deteriorates, or the yarn winding machine itself becomes defective. For this reason, conventionally, a yarn winding machine is known that is capable of sucking and removing a removal substance by applying a suction flow to an appropriate portion. Patent Documents 1 and 2 disclose this type of yarn winding machine.

  Patent Document 1 discloses a yarn winding machine having a structure in which an air inlet of a blower for sucking and removing fluff is disposed downward. A filter is attached to the air inlet, and the blower and the like can be deposited on the filter by operating the blower. By stopping the operation of the blower in this state, the suction force can be eliminated and the fluff etc. can be dropped downward.

  Patent Document 2 discloses a yarn winding machine including a section duct and a section blower provided for each predetermined number of spinning units, and a main duct and a main blower that collectively convey fluff collected by the section duct. To do. Patent Document 2 describes that the rotational speeds of the blades of each section blower are made different so that the acting force of the suction flow of the main blower does not vary depending on the distance from the main blower. Specifically, the rotation speed of the blades of the section blower is controlled so as to be closer to the main blower.

JP-A 63-50537 JP 2012-132112 A

  However, in patent document 1, it is not described about the structure which collects the fluff etc. which were dropped below. Patent Document 2 describes that the rotational speed of the blades of each section blower is varied, but does not describe changing the rotational speed of the blades of each section blower according to time.

  A main object of the present invention is to easily remove removed substances accumulated on a filter member using a suction flow generated by a main blower in a yarn winding machine including a section duct, a section blower, a main duct, and a main blower. And providing a configuration capable of reducing the load on the main blower.

Means and effects for solving the problems

  According to an aspect of the present invention, a yarn winding machine having the following configuration is provided. That is, the yarn winding machine includes a plurality of winding units, a section duct, a section suction device, a filter member, a main duct, a main suction device, and a control unit. The removal material generated in at least one of the plurality of winding units flows through the section duct. The section suction device has rotating blades and generates a suction flow in the section duct for sucking the removed substance from the winding unit. The filter member is disposed between the section duct and the section suction device. The main duct is connected to a plurality of the section ducts, and the removal material from the section ducts flows. The main suction device generates a suction flow in the main duct for moving the removed substance from the section duct. The control unit performs deceleration control to temporarily reduce the rotation speed of the blade while maintaining the state in which the blade continues to rotate when the main suction device is generating the suction flow. .

  Thereby, the suction force in a section duct can be reduced by performing the deceleration control which makes the rotational speed of the blade | wing of a section suction device slow. While this deceleration control is being performed, the removed substance deposited on the filter member can be easily removed using the suction flow generated by the main suction device. Moreover, since the rotation of the blades of the section suction device is not completely stopped, the load on the main suction device can be suppressed.

  In the yarn winding machine, the control unit can perform normal control for rotating the blades of the section suction device in a predetermined speed range, and starts the deceleration control after the normal control. Is preferred.

  Thereby, the control part can perform the deceleration control and can send the removal substance deposited by performing normal control to a main duct.

  In the yarn winding machine, it is preferable that the control unit increases the rotational speed of the blades of the section suction device until the predetermined speed range in the normal control is reached after the deceleration control.

  Thereby, the control part can return the rotational speed of the blade | wing decelerated by performing deceleration control to the predetermined speed range in normal control.

  The yarn winding machine preferably has the following configuration. That is, the section suction device includes a section driving unit that generates power for rotating the blades. The control unit performs the deceleration control by turning off the power of the section driving unit.

  Thereby, deceleration control can be easily performed with respect to the rotational speed of the blades of the section suction device.

  In the yarn winding machine, the control unit preferably turns on the power of the section driving unit before the rotation of the blades of the section suction device stops.

  Thereby, it can prevent by simple control that the blade | wing of a section suction device stops completely.

  The yarn winding machine preferably has the following configuration. In other words, the yarn winding machine includes at least a pressure detection unit that detects a pressure in a region where the suction flow generated by the section suction device acts. When the pressure detected by the pressure detection unit is out of a predetermined range, the control unit starts the deceleration control.

  As a result, the amount of the removed substance deposited on the filter member and the strength of the suction flow generated by the section suction device are correlated, so that the deceleration control can be started at an appropriate timing.

  In the yarn winding machine, it is preferable that the pressure detection unit is disposed between the filter member and the section suction device.

  If the removal substance is excessively deposited on the filter member, the suction flow of the section suction device is less likely to act. Accordingly, the pressure between the filter member and the section suction device increases. Therefore, by detecting the pressure in this region, the deceleration control can be started according to the amount of the removed substance deposited on the filter member.

  In the yarn winding machine, it is preferable that the pressure detection unit is disposed in at least one of the winding unit, the section duct, and between the winding unit and the section duct.

  If the removal substance is excessively deposited on the filter member, the suction flow of the section suction device is less likely to act. Accordingly, by detecting the pressure in at least one of the above regions, the deceleration control can be started according to the amount of the removed substance deposited on the filter member.

  In the yarn winding machine, the control unit preferably starts the deceleration control at a preset timing.

  Thereby, deceleration control can be started with simple control.

  In the yarn winding machine, the control unit performs the deceleration by the section suction device of one of the plurality of section suction devices at a timing when the deceleration control is not performed in all of the plurality of section suction devices. It is preferable to start the control.

  This reduces the load on the main suction device by shifting the start timing of the deceleration control for each section suction device because the load on the main suction device increases by performing deceleration control on one section suction device. it can.

  In the yarn winding machine, it is preferable that the winding unit winds the yarn at least during a period in which the deceleration control is performed on the section suction device provided for the winding unit. .

  Thereby, since the yarn can be wound even during the deceleration control, the yarn winding machine can be operated efficiently.

  The yarn winding machine further includes a discharge duct provided for each of the plurality of section ducts and having a discharge port through which a suction flow passing through the filter member passes and is discharged to the outside. The filter member is provided at a connection portion between the section duct and the discharge duct. The section suction device is provided between the filter member and the discharge port in the discharge duct.

  Thereby, the suction flow generated by the section suction device can be more efficiently applied to the section duct.

The front view of the spinning machine which concerns on one Embodiment of this invention. The longitudinal cross-sectional view of a spinning machine. Front sectional drawing which shows the structure of a fluff removal part. The graph which shows the process which controls the rotational speed of the blade | wing of a section blower according to a pressure. The expanded sectional view which shows the state in which the fluff accumulated on the filter member. The expanded sectional view which shows the state from which the fluff deposited on the filter member was removed. The flowchart explaining the process which concerns on deceleration control. The expanded sectional view which shows the position of the pressure detection sensor of the fluff removal part which concerns on a 1st modification. The table | surface which shows the schedule which determines the start timing of the deceleration control which concerns on a 2nd modification.

  Next, a spinning machine (yarn winding machine) according to an embodiment of the present invention will be described with reference to the drawings. A spinning machine 1 as a yarn winding machine shown in FIG. 1 includes a large number of spinning units (winding units) 2 arranged side by side, a yarn splicing cart 3, a blower box 4, 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 fluff removing unit 30, a yarn accumulating device 12, and a winding device arranged in order from upstream to downstream. 13. In the description of FIGS. 1 and 2, “upstream” and “downstream” mean upstream and downstream in the traveling (conveying) direction of the sliver 15, fiber bundle 8, and spun yarn 10 during spinning.

  The draft device 7 is provided in the vicinity of the upper end of the frame 6 provided in the spinning machine 1. The draft device 7 includes four roller pairs of a back roller pair 16, a third roller pair 17, a middle roller pair 19, and a front roller pair 20 in order from the upstream side. In the middle roller pair 19, an apron belt 18 is provided for each roller. The draft device 7 drafts the sliver 15 supplied from a sliver case (not shown) until it reaches a predetermined thickness. The fiber bundle 8 drafted by the draft device 7 is supplied to the spinning device 9.

  The spinning device 9 includes a swirl flow generation chamber (not shown) into which the fiber bundle 8 can be inserted. The spinning device 9 generates a swirl flow in the swirl flow generation chamber by injecting compressed air from a nozzle (not shown) into the swirl flow generation chamber. The spinning device 9 generates a spun yarn 10 by twisting the fiber bundle 8 by a swirling flow.

  In the spinning device 9, fibers (cotton) that are not twisted into the spun yarn 10 during spinning are generated. The fluff is conveyed to a cotton collection box (not shown) via a suction pipe 91, a section duct 31, and a main duct 37 provided in the fluff removing unit 30. Thereby, since the fluff does not stay in the swirl flow generating chamber, the generation of swirl flow is not hindered. The detailed configuration of the fluff removing unit 30 will be described later.

  A yarn accumulating device 12 is provided downstream of the spinning device 9. As shown in FIG. 2, the yarn storage device 12 includes a yarn storage roller 21 and a motor 25 that rotationally drives the yarn storage roller 21.

  The yarn storage roller 21 winds a certain amount of spun yarn 10 around its outer peripheral surface and temporarily stores it. The yarn accumulating roller 21 rotates at a predetermined rotational speed with the spun yarn 10 wound around the outer peripheral surface, thereby pulling the spun yarn 10 from the spinning device 9 at a predetermined speed and transporting it downstream. Since the yarn storage device 12 can temporarily store the spun yarn 10 on the outer peripheral surface of the yarn storage roller 21, it functions as a kind of buffer. As a result, the problem that the spinning speed in the spinning device 9 and the winding speed (speed of the spun yarn 10 wound on the package 45) do not match for some reason (for example, slack of the spun yarn 10) can be eliminated. it can.

  The upstream guide 23 is disposed slightly upstream of the yarn accumulating roller 21. The upstream guide 23 guides the spun yarn 10 to the outer peripheral surface of the yarn accumulating roller 21.

  A yarn clearer 52 is provided between the spinning device 9 and the yarn storage device 12. The spun yarn 10 generated by the spinning device 9 passes through the yarn clearer 52 before being taken up by the yarn accumulating device 12. The yarn clearer 52 monitors the thickness of the traveling spun yarn 10. When the yarn clearer 52 detects a yarn defect of the spun yarn 10, it transmits a yarn defect detection signal to a unit controller (not shown).

  When the unit controller receives the yarn defect detection signal from the yarn clearer 52, the unit controller stops driving the spinning device 9, cuts the spun yarn 10, and stops winding by the winding device 13. The unit controller sends a control signal to the yarn splicing cart 3 to cause the yarn splicing cart 3 to travel to the spinning unit 2. Thereafter, the unit controller drives the spinning device 9 again after the completion of the yarn splicing by the yarn splicing carriage 3, and resumes the winding by the winding device 13.

  As illustrated in FIGS. 1 and 2, the yarn joining cart 3 includes a yarn joining device 43, a suction pipe 44, and a suction mouth 46. When a yarn breakage or a yarn cut occurs in the spinning unit 2, the yarn joining cart 3 travels on the rail 41 and stops at a work position with respect to the spinning unit 2. The suction pipe 44 rotates upward about the shaft, captures the spun yarn 10 delivered from the spinning device 9, and rotates downward about the shaft to thereby spun the spun yarn 10 together. Guide to device 43. The suction mouse 46 rotates downward about the shaft, captures the spun yarn 10 from the package 45, and guides the spun yarn 10 to the yarn joining device 43 by rotating upward about the shaft. To do. The yarn joining device 43 performs yarn joining between the guided spun yarns 10.

  The winding device 13 includes a cradle arm 71, a winding drum 72, and a traverse device 75. The cradle arm 71 is supported so as to be swingable around the support shaft 70, and can support the bobbin 48 for winding the spun yarn 10 in a rotatable manner. The winding drum 72 rotates in contact with the outer peripheral surface of the bobbin 48 or the package 45. The traverse device 75 includes a traverse guide 76 that can guide the spun yarn 10. The winding device 13 drives the winding drum 72 by an electric motor (not shown) while reciprocating the traverse guide 76 by a driving means (not shown). Accordingly, the spun yarn 10 is wound around the package 45 while traversing the spun yarn 10.

  Next, the configuration of the fluff removing unit 30 will be described with reference to FIG. In the description of the fluff removing unit 30, “upstream” and “downstream” mean upstream and downstream in the removal material conveyance direction (that is, the direction in which the suction flow flows).

  As shown in FIG. 3, the fluff removal unit 30 includes a section duct 31, a section blower (section suction device) 32, a filter member 33, a pressure detection unit 35, a main duct 37, and a main blower (main suction). Device) 38 (FIG. 1). The section blower 32 and the main blower 38 may be suction devices other than the blower.

  In the spinning machine 1 of the present embodiment, a suction pipe 91 shown in FIG. 2 is arranged for each spinning unit 2. The suction pipe 91 is disposed between the spinning unit 2 and the section duct 31. In the present embodiment, the upstream end portion of the suction pipe 91 is connected to the spinning device 9 of the spinning unit 2 (more specifically, an exhaust chamber (not shown) formed on the downstream side of the swirl flow generating chamber). Has been. As shown in FIG. 3, a predetermined number (20 in this embodiment) of suction pipes 91 of the spinning unit 2 are connected to one section duct 31. In the present embodiment, since one suction pipe 91 is arranged for one spinning unit 2, 20 suction pipes 91 are connected to one section duct 31. The section duct 31 is provided for each predetermined number of spinning units 2 (hereinafter, a group of the predetermined number of spinning units 2 is referred to as a section). The number of spinning units 2 in each section may be the same or different. Accordingly, the number of suction pipes 91 and the number of spinning units 2 connected to the section duct 31 may be the same for all the section ducts 31 or may be different for each section duct 31. The section duct 31 is connected to the main duct 37 and the discharge duct 34 on the downstream side thereof. Therefore, the suction flow generated by the main blower 38 also acts in the section duct 31.

  The section blower 32 is disposed inside the discharge duct 34 and in the vicinity of the filter member 33. The section blower 32 includes a blade 32a that generates a suction flow by rotating, and a section blower drive unit (section drive unit) 32b that drives the blade 32a. The section blower drive unit 32 b is an electric motor and is controlled by a section blower control unit (control unit) 39. The section blower control unit 39 may be provided in a control device that performs overall control of the spinning machine 1 or may be provided for each section.

  As shown in FIG. 3, the filter member 33 is provided at a connection portion between the section duct 31 and the discharge duct 34. The filter member 33 is configured in a mesh shape, and the mesh is configured so that the removal substance 81 does not pass through and air (a suction flow 82 described later) can pass through.

  The pressure detector 35 is disposed inside the discharge duct 34 and in a region between the filter member 33 and the section blower 32. The pressure detector 35 detects the pressure in this region. In this region, at least the suction flow 82 generated by the section blower 32 acts. The pressure detection unit 35 outputs a pressure detection signal to the section blower control unit 39.

  The section blower 32 can suck air on the section duct 31 side through the filter member 33 and generate a suction flow 82 in the section duct 31 and the suction pipe 91. This suction flow 82 is mainly used to move the removal substance 81 generated in the spinning device 9 to the vicinity of the downstream end of the section duct 31 via the suction pipe 91.

  The suction flow 82 that has passed through the filter member 33 is discharged to the outside through the discharge port 34 a of the discharge duct 34. The remaining suction flow 82 passes through the opening 36 formed between the section duct 31 and the main duct 37 and flows to the main duct 37 together with the removed substance 81. In this embodiment, a member (such as a shutter) for opening and closing the opening 36 is not provided.

  A main blower 38 is disposed in the blower box 4 in the vicinity of one end of the main duct 37 (FIG. 1). The main blower 38 generates a suction flow 83 in the main duct 37 by setting the downstream side of the main duct 37 to a negative pressure. The main blower 38 is always operating. The removed substance 81 is caused to flow to the unillustrated cotton collection box disposed at one end of the main duct 37 by the suction flow 83.

  In this embodiment, the fluff removal unit 30 is configured so that the flow rate of the suction flow 82 discharged through the discharge duct 34 is larger than the flow rate of the suction flow 82 introduced into the main duct 37. Thereby, the flow rate of the suction flow 83 sucked by the main blower 38 can be reduced, so that the power consumption of the main blower 38 can be reduced. However, the flow rate of the suction flow 82 discharged through the discharge duct 34 may be smaller than the flow rate of the suction flow 82 introduced into the main duct 37.

  Hereinafter, a method of removing the removal substance 81 deposited on the filter member 33 will be described with reference to FIGS.

  In the graph shown as “rotational speed” in FIG. 4, an example of a temporal change in the rotational speed of the blade 32 a of the section blower 32 is shown. As shown in FIG. 4, the section blower control unit 39 performs normal control and deceleration control.

  The normal control is mainly control for rotating the blade 32a at a substantially constant (predetermined speed range) rotation speed. The section blower control unit 39 performs normal control not only during winding of the spun yarn 10 but also during interruption of winding of the spun yarn 10 by yarn splicing or the like. In the present embodiment, the “predetermined speed range” is a speed range of the rotational speed after being increased from the rotational speed at the end of the deceleration control in the normal control. In the example shown in FIG. 4, the “predetermined speed range” is a speed indicated by a horizontal line that is faster than the speed during deceleration control. The “predetermined speed range” may be constant as shown in FIG. 4, or may be increased or decreased within a predetermined range so that the average value becomes a speed as shown in FIG.

  The deceleration control is control that maintains the rotation while temporarily reducing the rotation speed of the blade 32a. Control for completely stopping the blade 32a does not correspond to deceleration control. Note that it is necessary to accelerate the blade 32a in order to return to the normal control after the deceleration control. In the present embodiment, description will be made assuming that this acceleration is performed during normal control. In the present embodiment, only normal control and deceleration control are performed during winding of the spun yarn 10. Therefore, normal control and deceleration control are performed alternately (in other words, deceleration control is performed after normal control, Normal control is performed again after deceleration control). Since the main blower 38 is always operated as described above, the main blower 38 continues to operate during any of the deceleration control and the normal control.

  The section blower control unit 39 removes the deposited removal substance 81 by switching between normal control and deceleration control according to the accumulation amount of the removal substance 81 on the filter member 33. This will be specifically described below.

  As shown in FIG. 5, when the removal substance 81 is deposited on the filter member 33, the mesh of the filter member 33 is closed. Therefore, the suction flow 82 generated by the section blower 32 is less likely to act on the section duct 31. Instead, the suction flow 82 is liable to act in the discharge duct 34, so that the pressure in the discharge duct 34 increases. Therefore, the pressure detected by the pressure detector 35 increases as the amount of the removed substance 81 deposited increases. The graph indicated as “pressure” in FIG. 4 indicates that the pressure detected by the pressure detector 35 increases with time.

  The section blower control unit 39 determines the accumulation amount of the removed substance 81 on the filter member 33 based on the detection value of the pressure detection unit 35. Specifically, the section blower control unit 39 determines whether or not the detection value of the pressure detection unit 35 is larger than a predetermined threshold (S101 in FIG. 7).

  When the detection value of the pressure detection unit 35 is larger than the predetermined threshold, the section blower control unit 39 determines whether the other section blower 32 is under deceleration control (S102). When all other section blowers are not performing deceleration control, the section blower control unit 39 turns off the power to the section blower drive unit 32b (interrupts the supply of power to the section blower drive unit 32b) (S103). , Start deceleration control).

  By turning off the power of the section blower driving unit 32b, the rotational speed of the blade 32a is lowered as shown in FIG. Therefore, the suction flow 82 acting on the removed substance 81 on the filter member 33 is weakened. Therefore, as shown in FIG. 5, the removed substance 81 moves to the main duct 37 by the suction flow 83 generated by the main blower 38. In this way, by performing deceleration control, it is possible to remove the removal substance 81 accumulated on the filter member 33.

  During deceleration control by a certain section blower 32, the load on the main blower 38 increases. If deceleration control is simultaneously performed by the plurality of section blowers 32, the removal substance 81 may not be removed from the filter member 33. Accordingly, the section blower control unit 39, when the other section blowers 32 are under deceleration control, at the timing when the deceleration control of all the other section blowers 32 is completed (in other words, in all of the plurality of section blowers 32). The deceleration control of the next section blower 32 is started (at the timing when the deceleration control is not performed) (the process of S102 described above).

  The section blower control unit 39 counts the elapsed time after the start of the deceleration control, and determines whether or not this elapsed time exceeds a predetermined time (S104). The section blower control unit 39 turns on the power of the section blower drive unit 32b at the timing when it is determined that the elapsed time has exceeded the predetermined time (resuming the supply of power to the section blower drive unit 32b) (S105, deceleration) End of control). Thereby, as shown in FIG. 4, the rotational speed of the blade | wing 32a of the section blower 32 rises, and reaches the rotational speed at the time of normal control.

  This predetermined time is set shorter than the time until the rotation of the blade 32a of the section blower 32 stops. Therefore, it is possible to prevent the blade 32a from stopping completely. Thereby, since the suction force of the section blower 32 does not become zero, the load of the main blower 38 can be suppressed.

  Next, a first modification of the above embodiment will be described with reference to FIG. In the first modification, the pressure detection unit 35 is disposed in a region inside the suction pipe 91. In this region, at least the suction flow 82 of the section blower 32 acts. As shown in FIG. 5, when the removal substance 81 is deposited on the filter member 33, the mesh of the filter member 33 is closed. Therefore, the suction flow 82 generated by the section blower 32 is less likely to act on the section duct 31. Accordingly, the pressure inside the section blower 32 and the inside of the suction pipe 91 is reduced.

  The section blower control unit 39 of this modification determines whether or not the pressure detected by the pressure detection unit 35 is smaller than a predetermined threshold value. The section blower control unit 39 performs deceleration control when the pressure detected by the pressure detection unit 35 is smaller than a predetermined threshold.

  In the area where the filter material 33 is closer to the spinning unit 2 in the fluff removing section 30, the pressure decreases as the removal substance 81 is deposited. Therefore, the pressure detection unit 35 may be disposed at a location where the suction flow acts in the spinning unit 2. In the present embodiment, the pressure detection unit 35 is disposed in one of the plurality of suction pipes 91, but the pressure detection unit 35 may be disposed in each of the plurality of suction pipes 91.

  The pressure detection unit 35 may be disposed between the filter member 33 and the section blower 32, and the pressure detection unit 35 may be further disposed on the section blower 32 or the suction pipe 91. You may vary the attachment position and the number of attachment of the pressure detection part 35 for every section. In this case, there may be a section where the pressure detection unit 35 is not disposed.

  The pressure detection unit 35 may be provided in the spinning unit 2. Specifically, the pressure detection unit 35 may be provided in an exhaust path provided downstream of the swirl flow generation chamber of the spinning device 9. That is, the pressure detection unit 35 may be provided on the upstream side of the suction pipe 91.

  Next, a second modification of the above embodiment will be described with reference to FIG. In the embodiment and the first modification, the start timing of the deceleration control is determined based on the detection result of the pressure detection unit 35. On the other hand, in the second modification, deceleration control is performed according to a preset schedule.

  FIG. 9 shows an example of this schedule. According to the schedule of FIG. 9, the spinning machine 1 is provided with 10 sections, and in each section, one deceleration control is 5 seconds, and the deceleration control is performed once a hour. . The schedule is set so that the timing for performing the deceleration control is different in each section. By determining the start timing of the deceleration control by the method of the second modified example, the control performed by the section blower control unit 39 can be simplified.

  The deceleration control schedule may be set based on an arbitrary value input by an operator from an unillustrated setting unit or the like, or an initial value of the spinning machine 1 may be set. In the deceleration control schedule, the number of times and / or the period other than the above number and period may be set.

  As described above, the spinning machine 1 includes the spinning unit 2, the section duct 31, the section blower 32, the filter member 33, the main duct 37, the main blower 38, and the section blower control unit 39. Prepare. Each of the plurality of section ducts 31 is arranged for each at least one spinning unit 2, and the removed substance 81 generated in the spinning unit 2 flows through the section duct 31. The removed substance 81 generated in the spinning unit 2 flows in the section duct 31. The section blower 32 generates a suction flow 82 in the section duct 31 for sucking the removed substance 81. The filter member 33 is disposed between the section duct 31 and the section blower 32. The main duct 37 is connected to the plurality of section ducts 31. The removed substance 81 from the section duct 31 flows in the main duct 37. The main blower 38 generates a suction flow 83 for moving the removal substance 81 in the main duct 37. The section blower control unit 39 performs deceleration control for temporarily reducing the rotational speed of the blade 32a while maintaining the state in which the blade 32a continues to rotate when the main blower 38 generates the suction flow 83. Do.

  Thereby, the suction force in the section duct 31 can be reduced by performing the deceleration control that slows the rotation speed of the blade 32a of the section blower 32. While this deceleration control is performed, the removal substance 81 deposited on the filter member 33 can be easily removed using the suction flow generated by the main blower 38. Further, since the rotation of the blade 32a of the section blower 32 is not completely stopped, the load on the main blower 38 can be suppressed.

  The section blower control unit 39 of the spinning machine 1 can perform normal control for rotating the blades 32a of the section blower 32 within a predetermined speed range, and starts deceleration control after the normal control.

  Thereby, the section blower control unit 39 can send the removal substance 81 deposited by performing the normal control to the main duct 37 by performing the deceleration control.

  After the deceleration control, the section blower control unit 39 of the spinning machine 1 increases the rotational speed of the blade 32a included in the section blower 32 until it reaches a predetermined speed range during normal control.

  Thereby, the section blower control part 39 can return the rotational speed of the blade | wing 32a decelerated by performing deceleration control to the predetermined speed range in normal control.

  The section blower 32 of the spinning machine 1 includes a section blower driving unit 32b that generates power for rotating the blades 32a. The section blower control unit 39 performs deceleration control by turning off the power of the section blower driving unit 32b.

  Thereby, deceleration control of the rotational speed of the blade | wing 32a of the section blower 32 can be performed easily.

  The section blower control unit 39 of the spinning machine 1 turns on the power to the section blower driving unit 32b (resuming the supply of power to the section blower driving unit 32b) before the rotation of the blades 32a of the section blower 32 stops.

  Thereby, it can prevent by simple control that the blade | wing 32a of the section blower 32 stops completely.

  While the section blower control unit 39 of the spinning machine 1 performs the deceleration control, the operation of the main blower 38 continues.

  Thereby, the removal substance 81 deposited on the filter member 33 can be reliably removed by the suction flow of the main blower 38.

  The spinning machine 1 includes a pressure detection unit that detects a pressure in a region where the suction flow generated by the section blower 32 acts (specifically, a region between the filter member 33 and the section blower 32 in the discharge duct 34). 35. When the pressure detected by the pressure detection unit 35 deviates from a predetermined range (becomes greater than a predetermined threshold), the section blower control unit 39 starts deceleration control.

  As a result, the accumulation amount of the removal substance 81 on the filter member 33 and the strength of the suction flow generated by the section blower 32 are correlated, so that the deceleration control can be started at an appropriate timing.

  The spinning unit 2 of the spinning machine 1 winds the spun yarn 10 at least during a period during which deceleration control is performed on the corresponding section blower 32.

  Thereby, since the spun yarn 10 can be wound even during the deceleration control, the spinning machine 1 can be operated efficiently.

  The preferred embodiments and modifications of the present invention have been described above, but the above configuration can be modified as follows, for example.

  In the above embodiment, the section blower control unit 39 performs control so that the section blower drive unit 32b is turned off for a predetermined time and subjected to deceleration control, and then turned on to return to normal control. The power supply may be turned on and off repeatedly during the deceleration control. Deceleration control may be performed by lowering the rotational speed of the section blower drive unit 32b to a set value (target value). In the above embodiment, the rotational speed of the blade 32a of the section blower 32 is continuously decelerated. However, it is decelerated once and kept rotating at a substantially constant rotational speed (rotational speed slower than that during normal control). May be. As shown in FIG. 4, the rotational speed of the blades 32a may be reduced stepwise or in a curved line, without being reduced linearly. The rotational speed of the blade 32a during the deceleration control may be any speed except for the zero speed as long as it is lower than the rotational speed during the normal control.

  In the above embodiment, the deceleration control is not performed by the plurality of section blowers 32 at the same time. That is, the deceleration control of one section blower 32 is started from the state in which the normal control is performed in all the section blowers 32. However, the deceleration control may be performed simultaneously by a plurality of section blowers 32 by determining whether or not the deceleration control is started for each section.

  In the embodiment described above, the timing for terminating the deceleration control (timing for turning on the power supply of the section blower drive unit 32b) is determined based on the elapsed time. Instead of this, the timing for terminating the deceleration control may be determined based on the pressure detected by the pressure detector 35 (that is, based on the amount of the removed substance 81 deposited on the filter member 33).

  Instead of setting the number of spinning units 2 connected to one section duct 31 to 20 units, 1 to 19 units or 21 units or more may be used.

  The position and angle at which the filter member 33 is disposed are not particularly limited. For example, as disclosed in Japanese Patent Application Laid-Open No. 2012-132112, the filter member 33 may be arranged to be inclined so as to approach the opening 36 as it goes downstream.

  In addition to the suction pipe 91, a suction pipe that sucks and conveys the fluff attached to the draft roller of the draft device 7 may be connected to the section duct 31. In the spinning unit 2, a suction port for sucking yarn waste or the like may be provided on the downstream side of the spinning device 9, and a suction pipe having the suction port may be connected to the section duct 31. Furthermore, in a spinning machine provided with a yarn splicing device for each spinning unit 2, a pipe that sucks and conveys yarn waste generated during yarn splicing may be connected to the section duct 31.

  The spinning unit 2 draws the spun yarn 10 from the spinning device 9 by the yarn accumulating device 12, but is not limited to this configuration. For example, the spinning unit may be configured to draw the spun yarn 10 from the spinning device 9 using a delivery roller and a nip roller, and then store the spun yarn 10 using a yarn storage device 12 or a slack tube provided on the downstream side. . In the case where the spun yarn 10 is pulled out from the spinning device 9 by the delivery roller and the nip roller, the yarn accumulating device 12 can be omitted.

  The configuration of the present invention is not limited to the spinning machine as described above, and can be applied to, for example, an open-end spinning machine, an automatic winder, a twisting machine, and a spinning machine. When the configuration of the present invention is applied to, for example, an automatic winder, the present invention can be applied to the removal of yarn waste generated during yarn splicing.

1 Spinning machine (yarn winding machine)
30 Cotton removal part 31 Section duct 32 Section blower (section suction device)
33 Filter member 37 Main duct 38 Main blower (main suction device)
39 Section blower control unit (control unit)

Claims (12)

A plurality of winding units;
A section duct through which removed material generated in at least one of the plurality of winding units flows;
A section suction device having rotating blades and generating a suction flow in the section duct for sucking the removed substance from the winding unit;
A filter member disposed between the section duct and the section suction device;
A main duct connected to a plurality of the section ducts and through which the removal material from the section ducts flows;
A main suction device for generating a suction flow in the main duct for moving the removed substance from the section duct;
A control unit that performs deceleration control to temporarily reduce the rotational speed of the blade while maintaining the state in which the blade continues to rotate when the main suction device generates the suction flow;
A yarn winding machine comprising: The yarn winding machine according to claim 1,
The yarn winding machine, wherein the control unit is capable of performing normal control for rotating the blades of the section suction device within a predetermined speed range, and starts the deceleration control after the normal control. A yarn winding machine according to claim 2,
The yarn winding machine, wherein after the deceleration control, the control unit increases the rotational speed of the blades of the section suction device until the predetermined speed range is reached during the normal control. A yarn winding machine according to any one of claims 1 to 3,
The section suction device includes a section driving unit that generates power for rotating the blades,
The yarn winding machine, wherein the control unit performs the deceleration control by turning off the power of the section driving unit. The yarn winding machine according to claim 4,
The control unit turns on the power of the section drive unit before the rotation of the blades of the section suction device is stopped. A yarn winding machine according to any one of claims 1 to 5,
A pressure detector that detects at least the pressure of the region where the suction flow generated by the section suction device acts;
The yarn winding machine, wherein the controller starts the deceleration control when the pressure detected by the pressure detector is out of a predetermined range. The yarn winding machine according to claim 6,
The yarn winding machine, wherein the pressure detection unit is disposed between the filter member and the section suction device. The yarn winding machine according to claim 6,
The yarn winding machine, wherein the pressure detecting unit is disposed at least one of the winding unit, the section duct, and the winding unit and the section duct. A yarn winding machine according to any one of claims 1 to 8,
The yarn winding machine, wherein the control unit starts the deceleration control at a preset timing. A yarn winding machine according to any one of claims 1 to 8,
The control unit starts the deceleration control with one section suction device of the plurality of section suction devices at a timing when the deceleration control is not performed in all of the plurality of section suction devices. Yarn winding machine. A yarn winding machine according to any one of claims 1 to 10,
The yarn winding machine, wherein the winding unit winds a yarn at least during a period in which the deceleration control is performed on the section suction device provided for the winding unit. A yarn winding machine according to any one of claims 1 to 11,
A discharge duct having a discharge port provided for each of the plurality of section ducts and having a suction flow passing through the filter member and discharged to the outside;
The filter member is provided at a connection portion between the section duct and the discharge duct,
The yarn winding machine, wherein the section suction device is provided between the filter member and the discharge port in the discharge duct.

Images