Yarn winder

Abstract

To provide a yarn winder capable of avoiding accumulation of scrap in a suction duct while reducing energy consumption.SOLUTION: A yarn winder 1 is provided with a winding unit 2 having a first suction device 11, a carriage 3 having second suction devices 27, 28, a first suction duct 41 to which the first suction device 11 is connected, a second suction duct 42 to which the second suction devices 27, 28 are connected, a blower 45 for generating a suction air flow in the first suction duct 41 and the second suction duct 42, a first shutter 51 for opening and closing a first opening 51A of the first suction duct 41, a second shutter 52 for opening and closing a second opening 52A of the second suction duct 42, and a control unit 15 for controlling the opening and closing of the first shutter 51 and the second shutter 52 so that at least one of the start timings of the first opening operation and the second opening operation and the end timings of the first opening operation and the second opening operation deviate from each other.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] One aspect of the present invention relates to a yarn winding machine. [Background technology]

[0002] There is known a textile machine (spinning machine) that includes a plurality of winding units and a yarn splicing carriage that travels relative to the plurality of winding units. The yarn splicing carriage includes a yarn suction device, such as a suction mouth and a suction nozzle, and a yarn splicing device. The yarn suction device is configured to capture a yarn end using a suction air flow. Each of the winding units may be provided with a yarn suction device that uses a suction air flow to suck in waste yarn generated in the yarn storage device. The suction air flow used in these yarn suction devices is supplied from a suction duct provided in a machine body on which the plurality of winding units are arranged.

[0003] A blower that generates a suction air flow is connected to one end of the suction duct in the extension direction via a collection box. In this configuration, the waste yarn sucked by the blower is transported to the collection box and stored therein. However, the amount of air flowing in from the suction port of the yarn suction device is insufficient to transport the waste yarn to the collection box, and the waste yarn sucked from the suction port of the yarn suction device may not be transported to the collection box. In this case, the waste yarn accumulates in the suction duct, increasing the effort required by workers for cleaning and other tasks. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-183338 A Summary of the Invention [Problem to be solved by the invention]

[0005] To cope with this, an opening is provided at the end of the suction duct opposite to the end on the blower side in the extension direction to increase the amount of air flowing through the suction duct. However, while this configuration of providing an opening at the end of the suction duct can prevent the accumulation of waste lint in the suction duct, it increases the load on the blower and increases energy consumption.

[0006] Therefore, an object of one aspect of the present invention is to provide a yarn winding machine that can reduce the amount of energy consumed by the blower while preventing yarn waste from accumulating in the suction duct. [Means for solving the problem]

[0007] A yarn winding machine according to one aspect of the present invention includes a plurality of winding units each having a yarn supplying device that supplies yarn, a winding device that winds the yarn supplied from the yarn supplying device to form a package, and a first suction device that sucks in at least one of the yarn and waste yarn generated from the yarn, a carriage that has a second suction device that sucks in at least one of the yarn and waste yarn and is arranged to be movable along an arrangement direction of the plurality of winding units, a first suction duct to which the first suction device is connected and that extends from a first end to a second end in the arrangement direction, a second suction duct to which the second suction device is connected and that extends from a third end to a fourth end in the arrangement direction, and waste yarn is collected at a first end of the first suction duct and a third end of the second suction duct. The system comprises a blower connected via a collection box and generating a suction air flow in the first suction duct and the second suction duct, a first shutter for opening and closing a first opening formed at a second end of the first suction duct, a second shutter for opening and closing a second opening formed at a fourth end of the second suction duct, and a control unit for controlling the opening and closing of the first shutter in a first opening operation for opening the first opening, and the opening and closing of the second shutter in a second opening operation for opening the second opening, wherein the control unit controls the opening and closing of the first shutter and the second shutter so that at least one of the start timings of the first opening operation and the second opening operation and the end timings of the first opening operation and the second opening operation are shifted from each other.

[0008] In the yarn winding machine having this configuration, the first shutter is controlled to open the first opening formed in the first suction duct, thereby temporarily increasing the amount of air flowing through the first suction duct. Similarly, in the yarn winding machine having this configuration, the second shutter is controlled to open the second opening formed in the second suction duct, thereby temporarily increasing the amount of air flowing through the second suction duct. As a result, by opening the first opening and the second opening only when necessary, the waste yarn remaining in the first suction duct and the second suction duct can be moved to the blower side and collected in the collection box. Furthermore, in the yarn winding machine having this configuration, when the first opening and the second opening are opened, the opening and closing of the first shutter and the second shutter are controlled so that at least one of the start timings of the first opening operation and the second opening operation and the end timings of the first opening operation and the second opening operation are shifted from each other. Therefore, the time during which both the first opening and the second opening are open is relatively short compared to when the first shutter and the second shutter are opened and closed synchronously. This reduces the energy consumption of the blower.

[0009] In the yarn winding machine according to one aspect of the present invention, the control unit may control the opening and closing operations of the first shutter and the second shutter so that the time period during which the first opening is open and the time period during which the second opening is open do not overlap. This configuration can prevent a decrease in the suction capacity of the first suction device and the second suction device. In addition, this configuration can further reduce energy consumption in the blower because both the first opening and the second opening are not open at the same time.

[0010] In the yarn winding machine according to one aspect of the present invention, the control unit may control the opening and closing operations of the first shutter and the second shutter such that a time period during which both the first opening and the second opening are closed exists between a time period during which the first opening is open and a time period during which the second opening is open. In this configuration, the time period during which both the first opening and the second opening are closed is ensured, thereby further reducing the energy consumption of the blower.

[0011] A yarn winding machine according to one aspect of the present invention includes one or more carriages having a yarn joining device that joins a yarn that is broken between the yarn supplying device and the winding device, and the control unit may control the opening and closing operations of the first shutter and the second shutter based on at least one of the number of times the yarn is broken between the yarn supplying device and the winding device and the number of times the yarn joining device has performed. The number of times the yarn is joined can be indirectly obtained by obtaining the number of times the yarn is joined. When the yarn joining device performs yarn joining, waste yarn is generated, so the amount of waste yarn generated can be estimated based on at least one of the number of times the yarn is joined and the number of times the yarn is joined. Therefore, with this configuration, the opening and closing operation of the second shutter can be performed at an appropriate timing.

[0012] In the yarn winding machine according to one aspect of the present invention, the control unit may control the first shutter to open / close the first shutter and the second shutter to open / close the second shutter when the yarn joining operation is not being performed by the yarn joining device. In this configuration, the opening / closing operation is not performed during the yarn joining operation, so that the yarn joining operation can be stably performed.

[0013] A yarn winding machine according to one aspect of the present invention includes at least one of a first detection unit that detects a static pressure in the first suction duct and a second detection unit that detects a static pressure in the second suction duct, and the control unit may prohibit the opening and closing of the first shutter when the static pressure detected by the first detection unit is below a predetermined value, and prohibit the opening and closing of the second shutter when the static pressure detected by the second detection unit is below the predetermined value. In this configuration, the opening and closing of the first shutter or the second shutter is prohibited when the static pressure in the first suction duct or the second suction duct is decreasing due to the yarn splicing cart performing the yarn splicing operation. This makes it possible to prevent the static pressure in the first suction duct or the second suction duct from decreasing further, and to prevent interference with the yarn splicing operation of the yarn splicing cart.

[0014] A yarn winding machine according to one aspect of the present invention includes at least one of a third shutter provided between a first suction device and a first suction duct and a fourth shutter provided between a second suction device and the second suction duct, the third shutter being configured to be openable and closable depending on whether the first suction device is operating and is closed when the first suction device is not operating, and the fourth shutter being configured to be openable and closable depending on whether the second suction device is operating and is closed when the second suction device is not operating. With this configuration, the first suction device and the first suction duct communicate with each other only when necessary, so that an unnecessary drop in static pressure in the first suction duct can be avoided. Also, with this configuration, the second suction device and the second suction duct communicate with each other only when necessary, so that an unnecessary drop in static pressure in the second suction duct can be avoided. As a result, with this configuration, the energy consumption of the blower can be reduced.

[0015] In a yarn winding machine according to one aspect of the present invention, the first suction device may suck the yarn on the winding device side, and the second suction device may suck the yarn on the yarn supplying device side, and the control unit may control the opening and closing operations of the first shutter and the second shutter so that the opening and closing frequency of the second shutter is higher than the opening and closing frequency of the first shutter. In general, the amount of waste yarn sucked by the second suction device is greater than the amount of waste yarn sucked by the first suction device, and waste yarn is more likely to accumulate in the second suction duct than in the first suction duct. In this configuration, the flow rate of the second suction duct is more frequently increased than that of the first suction duct, so that accumulation of waste yarn in the second suction duct can be avoided.

[0016] In the yarn winding machine according to one aspect of the present invention, the control unit may control the opening and closing of at least one of the first shutter and the second shutter based on spinning conditions in the yarn supplying device. In this configuration, the opening operations of the first shutter and the second shutter can be performed at appropriate timing based on a prediction of the amount of waste yarn generated. As a result, accumulation of waste yarn in the first suction duct and the second suction duct can be more reliably prevented.

[0017] A yarn winding machine according to one aspect of the present invention includes a third detection unit that detects the static pressure of the suction air flow in a collection box and a notification unit that notifies the user that the collection box needs to be cleaned, and the control unit may, when the static pressure detected by the third detection unit falls below a predetermined value, cause the notification unit to notify the user that the collection box needs to be cleaned and execute at least one of the first opening operation and the second opening operation. In this configuration, when the amount of waste yarn in the collection box increases, the static pressure value in the collection box decreases, and the notification unit can notify the user that the collection box needs to be cleaned. In addition, in this configuration, waste yarn accumulated in the first suction duct or the second suction duct can be collected in the collection box before the user cleans the collection box (before removing the waste yarn).

[0018] In a yarn winding machine according to one aspect of the present invention, a portion of the first opening may be formed below the height direction of the inner cross section of the first suction duct, and a portion of the second opening may be formed below the height direction of the inner cross section of the second suction duct. Waste yarn often accumulates on the lower surfaces of the inner surfaces of the first suction duct and the second suction duct. In this configuration, the amount of air flowing along the lower surfaces of the first suction duct and the second suction duct is increased, so that waste yarn accumulated on the lower surfaces of the first suction duct and the second suction duct can be reliably moved to the blower side. Effect of the Invention

[0019] According to one aspect of the present invention, it is possible to prevent the accumulation of lint in the suction duct while reducing the energy consumption in the blower. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a front view of a spinning machine according to one embodiment. [Diagram 2] FIG. 2 is a side view of a spinning unit included in the spinning machine of FIG. [Diagram 3] FIG. 3 is a perspective view showing a suction mechanism included in the spinning unit of FIG. [Figure 4]4(A) to 4(D) are diagrams illustrating the operation of a fourth shutter included in the spinning unit of FIG. [Diagram 5] Fig. 5(A) is a perspective view showing a state in which the first opening (second opening) is opened by the first shutter (second shutter), and Fig. 5(B) is a perspective view showing a state in which the first opening (second opening) is closed by the first shutter (second shutter). [Figure 6] Fig. 6(A) is a schematic diagram of a first suction duct and a second suction duct, Fig. 6(B) is a plan view showing a lever provided in the sub-duct, and Fig. 6(C) is a cross-sectional view showing a shutter provided in the sub-duct. [Figure 7] FIG. 7 is a functional block diagram showing a functional configuration of the yarn winding machine. [Figure 8] FIG. 8 is a side view of a modified spinning unit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are given the same reference numerals, and duplicated explanations will be omitted. "Upstream" and "downstream" refer to the upstream and downstream in the running direction of the yarn during spinning. The dimensional ratios of the drawings do not necessarily match those in the description.

[0022] 1, a spinning machine (yarn winding machine) 1 includes a main frame 2A, a first end frame 4, a second end frame 5, a yarn splicing carriage (carriage) 3, a doffing carriage (not shown), and a suction air flow supply mechanism 40. The first end frame 4, the main frame 2A, and the second end frame 5 are arranged in one direction. On the main frame 2A, there are arranged a plurality of spinning units (winding units) 2 that produce yarn Y and wind it into a package P, as well as a first suction duct 41, a second suction duct 42, a first shutter 51, a second shutter 52, etc., which are part of the suction air flow supply mechanism 40 described in detail later. On the main frame 2A, a plurality of spinning units 2 are arranged in one direction.

[0023] A part of a first suction duct 41, which is a part of a suction air flow supply mechanism 40 described in detail later, a part of a second suction duct 42, a blower 45, a collection box 48, etc. are arranged on the first end frame 4. The first end frame 4 is arranged at one end in the arrangement direction of the multiple spinning units 2.

[0024] The second end frame 5 houses an air pressure adjustment unit for adjusting the pressure of compressed air supplied from an air pressure pump (not shown) arranged in the textile factory where the spinning machine 1 is installed and supplying air to each part of the spinning machine 1, as well as a drive motor for supplying power to each part of the spinning unit 2.

[0025] The second end frame 5 is provided with a machine controller (control unit) 15 and an input device 18. The machine controller 15 centrally manages and controls each part of the spinning machine 1 (see FIG. 7). The machine controller 15 has an input / output interface for inputting and outputting signals to and from the outside, a memory unit such as a ROM (Read Only Memory) in which programs and information for performing processing are stored, a RAM (Random Access Memory) for temporarily storing data, a CPU (Central Processing Unit), and a communication circuit. Based on a signal output by the CPU, the machine controller 15 stores input data in the RAM, loads the program stored in the ROM into the RAM, and executes the program loaded into the RAM to perform various processes.

[0026] The input device 18 has a display screen 16 and input keys 17. The display screen 16 can display information on at least one of the settings and the state of the spinning unit 2. The worker can perform appropriate operations using the input keys 17 to perform setting work for the spinning unit 2. When the display screen 16 is configured as a touch panel display, the display screen 16 and the input keys 17 are configured integrally. The input device 18 allows the spinning conditions for the air spinning device 7 to be set via the display screen 16 or the input keys 17. The spinning conditions include the yarn type, yarn thickness, spinning speed, etc. The machine controller 15 controls each part of the spinning machine 1 based on such spinning conditions.

[0027] 1 and 2, each spinning unit 2 includes, in order from the upstream side in the running direction of the yarn Y, a draft device 6, an air spinning device (yarn supplying device) 7, a yarn monitoring device 8, a tension sensor 9, a yarn storage device 11, a waxing device 12, and a winding device 13. The draft device 6, the air spinning device 7, the yarn monitoring device 8, the tension sensor 9, the yarn storage device 11, the waxing device 12, and the winding device 13 are fixed to the main frame 2A. A unit controller 10 is provided for each of a predetermined number of spinning units 2, and controls the operation of the spinning units 2. The unit controller 10 may be provided in each spinning unit 2.

[0028] The draft device 6 drafts the sliver S. The draft device 6 has, in order from the upstream side in the running direction of the sliver S, a back roller pair, a third roller pair, a middle roller pair, and a front roller pair. Each roller pair has a bottom roller and a top roller. The bottom rollers are rotated by a drive motor (not shown) provided on the second end frame 5 or a drive motor (shown) provided on each draft device 6.

[0029] The air spinning device 7 generates yarn Y by twisting the fiber bundle F drafted by the draft device 6 with a swirling air flow. The air spinning device 7 supplies the generated yarn Y downstream. In more detail (not shown), the air spinning device 7 has a spinning chamber, a fiber guide, a swirling airflow generating nozzle, and a hollow guide shaft. The fiber guide guides the fiber bundle F supplied from the upstream draft device 6 into the spinning chamber. The swirling airflow generating nozzle is disposed around the path along which the fiber bundle F travels. Air is sprayed from the swirling airflow generating nozzle to generate a swirling airflow in the spinning chamber. The swirling airflow causes each fiber end of the multiple fibers constituting the fiber bundle F to be inverted and swirled. The hollow guide shaft guides the yarn Y from inside the spinning chamber to outside the air spinning device 7.

[0030] The yarn pooling device 11 pools the yarn Y between the air spinning device 7 and the winding device 13. The yarn pooling device 11 has the functions of stably drawing out the yarn Y from the air spinning device 7, retaining the yarn Y sent out from the air spinning device 7 during a yarn splicing operation by the yarn splicing cart 3, etc., to prevent the yarn Y from slackening, and adjusting the tension of the yarn Y on the winding device 13 side to prevent fluctuations in the tension of the yarn Y on the winding device 13 side from being transmitted to the air spinning device 7 side.

[0031] As shown in Figures 2 and 3, the yarn pooling device 11 includes a yarn pooling roller 11A, an electric motor 11B, a pooled yarn amount sensor 11C, a yarn hooking member 11D, a yarn removal member 11E, a suction mechanism (first suction device) 11F, a first guide member 11J, and a second guide member 11K.

[0032] The yarn storage roller 11A is fixed to a drive shaft of the electric motor 11B and is rotated by the electric motor 11B. The yarn storage section 11Aa of the yarn storage roller 11A is a cylindrical section around which the yarn Y is wound. The yarn storage amount sensor 11C is a sensor that detects the presence or absence of the yarn Y on the yarn storage roller 11A in a non-contact manner. The yarn storage amount sensor 11C is disposed to face the yarn storage section 11Aa. When the amount of the yarn Y wound around the yarn storage roller 11A reaches a lower limit, the yarn storage amount sensor 11C transmits a lower limit storage amount detection signal to the unit controller 10. When the amount of the yarn Y wound around the yarn storage roller 11A reaches an upper limit, the yarn storage amount sensor 11C transmits an upper limit storage amount detection signal to the unit controller 10. The yarn storage amount sensor 11C may be composed of two sensors, a lower limit storage amount detection sensor and an upper limit storage amount detection sensor, instead of one sensor.

[0033] The yarn hooking member 11D is provided on the winding device 13 side (tip side) of the yarn storage roller 11A, and hooks the yarn Y and winds it around the yarn storage roller 11A. The yarn hooking member 11D is supported on the tip side of the yarn storage roller 11A so as to be rotatable relative to the yarn storage roller 11A about the same axis. The tip of the yarn hooking member 11D is curved to face the yarn storage section 11Aa so that the yarn Y is hooked. The yarn removing member 11E is a member that removes the yarn Y from the yarn hooking member 11D, and is disposed immediately downstream of the tip side of the yarn storage roller 11A. The yarn removing member 11E is supported so as to be swingable between a lowered position and an elevated position. The lowered position is a position where the yarn is retracted from the yarn path, and the elevated position is a position where the yarn Y on the yarn path is pushed up to remove the yarn Y from the yarn hooking member 11D.

[0034] The suction mechanism 11F generates a suction airflow at a suction port 11Fa disposed to face the yarn storage section 11Aa. The suction port 11Fa is provided at one end of a pipe-shaped member 11G, and the other end of the pipe-shaped member 11G is connected to a first suction duct 41, which will be described in detail later. The yarn Y cut on the air spinning device 7 side and waste yarn such as fiber waste generated from the yarn Y are sucked and removed by the suction mechanism 11F.

[0035] The first guide member 11J is disposed between the tension sensor 9 and the yarn storage roller 11A. The first guide member 11J is a plate material attached upstream of the yarn storage roller 11A, and guides the yarn Y supplied from the tension sensor 9 to the yarn storage section 11Aa. The second guide member 11K is disposed between the yarn storage roller 11A and the winding device 13. The second guide member 11K is a plate material disposed downstream of the yarn storage roller 11A, and guides the yarn Y to a predetermined position in the waxing device 12, while regulating the trajectory of the yarn Y swung by the rotating threading member 11D, thereby stabilizing the running of the yarn Y downstream of the second guide member 11K.

[0036] The waxing device 12 applies wax to the yarn Y between the yarn storage device 11 and the winding device 13.

[0037] The winding device 13 winds the yarn Y around a bobbin B to form a package P. The winding device 13 has a cradle arm 21, a winding drum 22, and a traverse guide 23. The cradle arm 21 rotatably supports the bobbin B. The cradle arm 21 is supported by a support shaft 24 so as to be able to swing. When rotating the bobbin B (package P) in the winding direction (forward rotation), the cradle arm 21 brings the surface of the bobbin B or the surface of the package P into contact with the surface of the winding drum 22 with an appropriate pressure. A drive motor provided on the second end frame 5 drives the winding drums 22 of the multiple spinning units 2 in unison. As a result, the bobbin B or the package P is rotated in the winding direction in each spinning unit 2.

[0038] The traverse guide 23 of each spinning unit 2 is provided on a shaft shared by the multiple spinning units 2. The drive motor of the second end frame 5 reciprocates the shaft in the direction of the rotation axis of the winding drum 22, causing the traverse guide 23 to traverse the yarn Y at a predetermined width relative to the rotating bobbin B or package P.

[0039] The yarn monitoring device 8 monitors the state of the traveling yarn Y between the air spinning device 7 and the yarn pooling device 11. The yarn monitoring device 8 monitors the state of the traveling yarn Y and detects the presence or absence of a yarn defect based on the monitored information. When the yarn monitoring device 8 detects a yarn defect, it transmits a yarn defect detection signal to the unit controller 10. When the unit controller 10 receives the yarn defect detection signal from the yarn monitoring device 8, it stops the operation of the air spinning device 7 to cut the yarn Y. The cutting of the yarn Y may be achieved by stopping the draft by the draft device 6 (rotation of the back roller pair).

[0040] The tension sensor 9 measures the tension of the traveling yarn Y between the air spinning device 7 and the yarn pooling device 11, and transmits a measurement signal to the unit controller 10.

[0041] When the yarn Y is cut in one of the spinning units 2 (one of the winding units) or breaks for some reason, the yarn splicing cart 3 performs a yarn splicing operation on that spinning unit 2. For example, a plurality of yarn splicing carts 3 are provided in the spinning machine 1. The yarn splicing cart 3 is provided movable relative to the plurality of spinning units 2, and moves along the arrangement direction of the spinning units 2 (the left-right direction in FIG. 1). The yarn splicing cart 3 is movable to a working position (a position where the yarn splicing operation is performed) relative to each of the plurality of spinning units 2.

[0042] The yarn splicing cart 3 includes a yarn splicing device 26, a suction nozzle (second suction device) 27, a suction mouth (second suction device) 28, a reverse rotation device 29, and a cart controller 32.

[0043] 2, when the yarn Y becomes broken between the air spinning device 7 and the winding device 13, the yarn joining device 26 performs a yarn joining operation to make the yarn Y continuous. The yarn joining device 26 holds and cuts the yarn Y captured by the suction mouth 28 with a clamp and cutter (not shown). The yarn joining device 26 holds and cuts the yarn Y captured by the suction nozzle 27 with a clamp and cutter (not shown).

[0044] The yarn splicing device 26 splices the cut yarn Y on the winding device 13 side with the cut yarn Y on the air spinning device 7 side. The yarn splicing device 26 is a splicer that uses compressed air, or a knotter that mechanically splices the yarns Y together. Alternatively, the yarn splicing device 26 may be configured to perform piecing to make the yarn Y continuous between the air spinning device 7 and the winding device 13 by running the yarn Y on the winding device 13 side in reverse to the air spinning device 7 and then resuming spinning by the air spinning device 7. In this embodiment, a splicer will be described as an example. In this embodiment, the yarn splicing device 26 can move in a direction approaching the path of the traveling yarn Y (left side in the example of FIG. 2) or in a direction away from the path (right side in the example of FIG. 2).

[0045] The suction nozzle 27 is rotatably supported by a support shaft 27a, and captures the yarn Y on the air spinning device 7 side and guides it to the yarn joining device 26. When capturing the yarn Y, the suction nozzle 27 sucks the yarn Y supplied from the air spinning device 7. The suction air flow during suction in the suction nozzle 27 is supplied from the second suction duct 42. The suction nozzle 27 is provided to be movable to a standby position P11, a first yarn capturing position P12 where the suction nozzle 27 captures the yarn Y supplied from the air spinning device 7, and a first yarn guiding position P13 where the suction nozzle 27 guides the yarn Y to the yarn joining device 26. The standby position P11 and the first yarn guiding position P13 may be the same position. The movement (rotation) of the suction nozzle 27 is controlled by the carriage controller 32.

[0046] The suction mouth 28 is rotatably supported by a support shaft 28a, approaches the winding device 13 to capture the yarn Y on the winding device 13 side, and moves in a direction away from the winding device 13 to guide the captured yarn Y to the yarn joining device 26. The suction airflow during suction in the suction mouth 28 is supplied from a second suction duct 42. The suction mouth 28 is provided so as to be movable between a standby position P21, a second yarn capturing position P22 where the suction mouth 28 captures the yarn Y from the winding device 13, and a second yarn guiding position P23 where the suction mouth 28 guides the yarn Y to the yarn joining device 26. The standby position P21 and the second yarn guiding position P23 may be the same position. The movement (rotation) of the suction mouth 28 is controlled by the carriage controller 32.

[0047] The suction airflow is supplied to the yarn splicing cart 3 via a second suction duct 42 provided across from the first end frame 4 to the main frame 2A. A plurality of supply ports 42a are formed in the second suction duct 42. In order to supply the suction airflow to the yarn splicing cart 3, each supply port 42a is formed in the second suction duct 42 at a position corresponding to each spinning unit 2. A plurality of fourth shutters 53 are provided in the second suction duct 42 so as to correspond to each supply port 42a. Each fourth shutter 53 opens and closes each supply port 42a by contact with a tip end 35a of a cart-side duct 35 provided in the yarn splicing cart 3. In other words, each fourth shutter 53 opens and closes each supply port 42a in conjunction with the movement of the yarn splicing cart 3. When the yarn splicing cart 3 is stopped at the working position, the corresponding supply port 42a is not closed by the fourth shutter 53, and the suction nozzle 27 and the suction mouth 28 of the yarn splicing cart 3 are connected to the second suction duct 42 via the cart-side duct 35.

[0048] 4(A) to 4(D), the fourth shutter 53 has a plurality of shutter portions 53b arranged radially around a support shaft 53a, and is rotatably supported by the support shaft 53a. A notch 53c is formed between adjacent shutter portions 53b in the direction of rotation around the support shaft 53a. The fourth shutter 53 is arranged such that the shutter portions 53b and the notches 53c are alternately positioned above the supply port 42a when the fourth shutter 53 rotates around the support shaft 53a.

[0049] As shown in Fig. 4(A), in a state in which the shutter portion 53b is positioned above the supply port 42a to close the supply port 42a, when the yarn splicing cart 3 approaches the spinning unit 2 corresponding to the supply port 42a, the fourth shutter 53 is rotated by contact with the tip portion 35a of the cart-side duct 35, as shown in Fig. 4(B). Then, as shown in Fig. 4(C), the cutout portion 53c is positioned above the supply port 42a to open the supply port 42a, and the supply port 42a and the cart-side duct 35 are connected, making it possible to supply a suctioned air flow to the yarn splicing cart 3.

[0050] After that, when the yarn splicing cart 3 leaves the spinning unit 2, as shown in FIG. 4(D), the fourth shutter 53 is further rotated by contact with the tip 35a of the cart-side duct 35, and the shutter part 53b is positioned above the supply port 42a, thereby closing the supply port 42a. At this time, if the suction force of the suction air flow is sufficiently acting on the supply port 42a, the shutter part 53b is prevented from shifting from the supply port 42a and the supply port 42a is prevented from being opened. In this way, the fourth shutter 53 is configured to be able to open and close depending on the presence or absence of the operation of the suction nozzle 27 and the suction mouth 28, and is closed when the suction nozzle 27 or the suction mouth 28 is not operating. In other words, the fourth shutter 53 is open when at least one of the suction nozzle 27 and the suction mouth 28 is operating.

[0051] Returning to Figs. 1 and 2, the reversing device 29 reverses rotation of the package P of the winding device 13. The reversing device 29 has a support arm 30 and a reverse roller 31. One end of the support arm 30 is connected to a support shaft. This allows the support arm 30 to swing around the support shaft. The support arm 30 is moved by a drive unit (not shown) such as a motor to a retracted position where the reverse roller 31 does not contact the package P, and a contact position where the reverse roller 31 contacts the package P. The swing of the support arm 30 is controlled by a cart controller 32.

[0052] The reverse roller 31 is provided at the other end of the support arm 30. The reverse roller 31 rotates (reverses) the package P in the unwinding direction, which is the opposite direction to the winding direction. When rotating the package P in the unwinding direction, the cradle arm 21 moves the surface of the package P away from the surface of the winding drum 22 (lifts up), and the yarn splicing cart 3 brings the reverse roller 31 into contact with the surface of the package P. This allows the package P in contact with the reverse roller 31 to rotate in the unwinding direction. The rotation of the reverse roller 31 is controlled by the cart controller 32.

[0053] The carriage controller 32 comprehensively controls the operation of the yarn splicing carriage 3. The carriage controller 32 has an input / output interface for inputting and outputting signals to and from the outside, a storage unit such as a ROM in which programs and information for performing processing are stored, a RAM for temporarily storing data, a CPU, and a communication circuit. Based on a signal output by the CPU, the carriage controller 32 stores input data in the RAM, loads the programs stored in the ROM into the RAM, and executes the programs loaded into the RAM to perform various processes. The carriage controller 32 is capable of communicating with the unit controller 10 and the machine controller 15.

[0054] The carriage controller 32 controls the yarn splicing operation by the yarn splicing carriage 3 and the movement of the yarn splicing carriage 3. The carriage controller 32 is connected to the unit controller 10. At an appropriate timing after the yarn monitoring device 8 of a certain spinning unit 2 detects a yarn defect, the unit controller 10 transmits a yarn splicing request signal to the machine controller 15. The machine controller 15, which receives the yarn splicing request signal, transmits a control signal to the carriage controller 32. This allows the yarn splicing carriage 3 to perform the yarn splicing operation for the spinning unit 2 that transmitted the yarn splicing request signal.

[0055] When a package P becomes full in a certain spinning unit 2, the doffing cart doffs the package P and supplies a new bobbin B to the spinning unit 2.

[0056] 1 and 6(A), the suction air flow supply mechanism 40 supplies a suction air flow to the suction mechanism 11F provided in the yarn storage device 11 of the spinning unit 2, and to the suction nozzle 27 and the suction mouth 28 provided in the yarn splicing cart 3. The suction air flow supply mechanism 40 includes a first suction duct 41, a second suction duct 42, a blower 45, a collection box 48, a sub duct 47, a first shutter 51, and a second shutter 52.

[0057] The first suction duct 41 is connected to the suction mechanisms 11F of the multiple spinning units 2. The first suction duct 41 extends from a first end 41R to a second end 41L in the arrangement direction of the spinning units 2. The first suction duct 41 is, for example, a square tube member having a square inner cross section. The second suction duct 42 is connected to the suction nozzle 27 and the suction mouth 28. The second suction duct 42 extends from a third end 42R to a fourth end 42L in the arrangement direction of the spinning units 2. The second suction duct 42 is, for example, a square tube member having a square inner cross section. In this embodiment, the third end 42R (a portion located on the blower 45 side) of the second suction duct 42 merges with the first end 41R (a portion located on the blower 45 side) of the first suction duct 41. However, each of the first suction duct 41 and the second suction duct 42 may be directly connected to the collection box 48. When the spinning machine 1 is viewed from the front, the right end position (first end 41R) of the first suction duct 41 and the right end position (third end 42R) of the second suction duct 42 in the arrangement direction of the spinning units 2 approximately coincide with each other, and the left end position (second end 41L) of the first suction duct 41 and the left end position (fourth end 42L) of the second suction duct 42 approximately coincide with each other. The second end 41L of the first suction duct 41 and the fourth end 42L of the second suction duct 42 are located on the same side (second end frame 5 side) with respect to the blower 45, and are located at the end of the main frame 2A.

[0058] The blower 45 generates a suction air flow. The blower 45 is driven by a blower motor 45M. The blower 45 is connected to the first end 41R of the first suction duct 41 and the third end 42R of the second suction duct 42 via a collection box 48. The suction port 45A of the blower 45 is connected to the first suction duct 41 and the second suction duct 42, and generates a suction air flow in the first suction duct 41 and the second suction duct 42. The exhaust port 45B of the blower 45 is connected to a sub-duct 47. The sub-duct 47 is, for example, a rectangular tube member having a rectangular inner cross section. The sub-duct 47 is connected to a main duct (not shown). The main duct is connected to a blower (not shown) other than the blower 45 described above. The main duct supplies the suction air flow to the draft device 6 and the air spinning device 7.

[0059] The collection box 48 uses a filter (not shown) to collect waste yarn contained in the suction airflow circulating from the suction mechanism 11F of the yarn pooling device 11 via the first suction duct 41 and waste yarn contained in the suction airflow circulating from the suction nozzle 27 and the suction mouth 28 of the yarn splicing cart 3 via the second suction duct 42. The collection box 48 is provided with an openable and closable door 49. The collected waste yarn is stored in the collection box 48 and is removed by cleaning through the door 49 by an operator under predetermined conditions. The collection box 48 is provided with a first static pressure sensor (third detection unit) 48A that detects the static pressure of the suction airflow in the collection box 48.

[0060] 6(B), a lever 47A is provided on the outer surface of the sub-duct 47. The lever 47A is rotatably supported by a support shaft 47B penetrating the sub-duct 47. A plate-shaped shutter 47C is attached to a portion of the support shaft 47B that is located inside the sub-duct 47. As a result, when an operator rotates the lever 47A, the shutter 47C rotates in conjunction with the lever 47A, thereby permitting or prohibiting the flow of suction air through the sub-duct 47.

[0061] The lever 47A functions as a switching unit that switches the mode of the collection box 48 between a collection mode and a cleaning mode. The collection mode is a mode for causing the collection box 48 to collect waste lint. In the collection mode, the shutter 47C is arranged parallel to the flow direction of the suction air flow in the sub-duct 47, and the shutter 47C allows the suction air flow to the sub-duct 47. The cleaning mode is a mode for cleaning the collection box 48. In the cleaning mode, the shutter 47C is arranged perpendicular to the flow direction of the suction air flow in the sub-duct 47, and the shutter 47C prohibits the suction air flow from flowing to the sub-duct 47.

[0062] The subduct 47 is provided with a proximity sensor 47D that detects the operation of the lever 47A or the operation of at least a part of a part that operates in conjunction with the lever 47A. The proximity sensor 47D detects a first operation and a second operation of the lever 47A. The first operation is the operation of the lever 47A when the mode of the collection box 48 is switched from the collection mode to the cleaning mode by the lever 47A. The second operation is the operation of the lever 47A when the mode of the collection box 48 is switched from the cleaning mode to the collection mode by the lever 47A. The proximity sensor 47D is disposed so as to detect the first operation at a position where the lever 47A has rotated about 10° when the mode of the collection box 48 is switched from the collection mode to the cleaning mode by the lever 47A.

[0063] As shown in Fig. 5(A) and Fig. 5(B), a panel plate 2Aa is provided on the side surface of the main frame 2A on the second end frame 5 side. In other words, the panel plate 2Aa is provided so as to be perpendicular to the extending direction of the first suction duct 41. The second end 41L of the first suction duct 41 extends to the panel plate 2Aa. The first opening 51A of the first suction duct 41 opens to the panel plate 2Aa. The first shutter 51 opens and closes the first opening 51A formed in the second end 41L of the first suction duct 41 (i.e., the panel plate 2Aa). The first shutter 51 includes an air cylinder 61, a connection plate 62, a closing plate 63, a stopper 64, and a cover plate 65.

[0064] The air cylinder 61 is an actuator in which a rod 61A advances and retreats by air pressure. A connection plate 62 is connected to the tip of the rod 61A of the air cylinder 61. The advancement and retreat of the rod 61A in the air cylinder 61 is controlled by the machine controller 15. The connection plate 62 is a rectangular plate-like member, and is supported rotatably relative to the panel plate 2Aa with one corner point as a rotation axis 62A. The connection plate 62 rotates relative to the panel plate 2Aa as the rod 61A advances and retreats. More specifically, the connection plate 62 rotates clockwise (right-handed) as the rod 61A advances, and rotates counterclockwise (left-handed) as the rod 61A retreats.

[0065] The closure plate 63 is a plate-like member connected to the connecting plate 62. The closure plate 63 rotates with the rotation of the connecting plate 62. When the rod 61A is moved all the way back and the closure plate 63 rotates counterclockwise, the closure plate 63 completely covers the first opening 51A and closes the first opening 51A. When the rod 61A is moved all the way forward and the closure plate 63 rotates clockwise, the closure plate 63 moves away from the first opening 51A and opens the first opening 51A.

[0066] The stopper 64 restricts the clockwise rotation of the connection plate 62 when the rod 61A is fully advanced. The cover plate 65 is disposed so as to face the panel plate 2Aa at a distance corresponding to the thickness of the closure plate 63. Therefore, the closure plate 63 can rotate between the cover plate 65 and the panel plate 2Aa disposed as described above. The cover plate 65 is provided with a plurality of through holes 65a. The size of each of the plurality of through holes 65a is smaller than the size of the first opening 51A. Therefore, it is possible to prevent foreign matter from entering the first suction duct 41. In this embodiment, the through holes 65a are round holes, but the shape of the through holes 65a is not particularly limited.

[0067] At least a part of the plurality of through holes 65a is formed below the height direction of the cross section of the first suction duct 41. More specifically, at least a part of the plurality of through holes 65a is arranged below the center of the cross section of the first suction duct 41 in the height direction. In this embodiment, the plurality of through holes 65a are arranged in the vertical and horizontal directions. The plurality of through holes 65a arranged in the horizontal direction at the bottom are arranged along the lower surface of the first suction duct 41. That is, a part of the first opening 51A formed at the second end 41L of the first suction duct 41 is formed below the height direction of the cross section of the first suction duct 41.

[0068] The fourth end 42L of the second suction duct 42 extends to the panel plate 2Aa. The second opening of the second suction duct 42 opens to the panel plate 2Aa. The second shutter 52 opens and closes the second opening 52A formed in the fourth end 42L of the second suction duct 42 (i.e., the panel plate 2Aa). The second shutter 52 has the same configuration as the first shutter 51. That is, the second shutter 52 includes an air cylinder 61, a connection plate 62, a closing plate 63, a stopper 64, and a cover plate 65. The configuration of the second shutter 52 is the same as the configuration of the first shutter 51, and therefore a detailed description thereof will be omitted here.

[0069] The control of the operations of the first shutter 51 and the second shutter 52 by the machine base controller 15 will be described. The machine base controller 15 controls the operation of the first shutter 51 in the first opening operation to open the first opening 51A, and the operation of the second shutter 52 in the second opening operation to open the second opening 52A. The machine base controller 15 controls the operations of the first shutter 51 and the second shutter 52 so that at least one of the start timings of the first opening operation and the second opening operation and the end timings of the first opening operation and the second opening operation are shifted from each other.

[0070] For example, the machine controller 15 may control the opening and closing of the first shutter 51 and the second shutter 52 so that the start timing of the first opening operation and the start timing of the second opening operation do not coincide with each other, or may control the opening and closing of the first shutter 51 and the second shutter 52 so that the end timing of the first opening operation and the end timing of the second opening operation do not coincide with each other. In other words, the machine controller 15 may control the opening and closing of the first shutter 51 and the second shutter 52 so that the start timing of the first opening operation and the start timing of the second opening operation are shifted from each other, or may control the opening and closing of the first shutter 51 and the second shutter 52 so that the end timing of the first opening operation and the end timing of the second opening operation are shifted from each other. The opening and closing of the first shutter 51 is controlled by setting at least one of the opening timing, closing timing, opening time per one time (operation time), and the number of operations per predetermined time of the first shutter 51. The opening and closing of the second shutter 52 is controlled by setting at least one of the opening timing, closing timing, opening time per one time (operation time), and the number of operations per predetermined time of the second shutter 52.

[0071] In the spinning machine 1 of such an embodiment, the first shutter 51 is controlled to open the first opening 51A of the first suction duct 41 only when necessary, thereby temporarily increasing the amount of air flowing through the first suction duct 41. Similarly, in the spinning machine 1 of such an embodiment, the second shutter 52 is controlled to open the second opening 52A of the second suction duct 42 only when necessary, thereby temporarily increasing the amount of air flowing through the second suction duct 42. This allows the waste yarn remaining in the first suction duct 41 and the second suction duct 42 to be moved toward the blower 45 and collected in the collection box 48.

[0072] Furthermore, in the spinning machine 1 of this embodiment, when the first opening 51A and the second opening 52A are opened, the opening and closing of the first shutter 51 and the second shutter 52 are controlled so that at least one of the start timings of the first opening operation and the second opening operation and the end timings of the first opening operation and the second opening operation are shifted from each other. Therefore, the time during which both the first opening 51A and the second opening 52A are open is relatively shorter than when the first shutter 51 and the second shutter 52 are opened synchronously. This allows the energy consumption of the blower 45 to be reduced.

[0073] For example, the machine controller 15 may control the opening and closing operations of the first shutter 51 and the second shutter 52 so that the time period during which the first opening 51A is open and the time period during which the second opening 52A is open do not overlap each other. In other words, the machine controller 15 may control the second opening 52A not to open when the first opening 51A is open, and control the first opening 51A not to open when the second opening 52A is open. With such an embodiment, it is possible to avoid a decrease in the suction capacity of the suction mechanism 11F connected to the first suction duct 41 and the suction nozzle 27 and the suction mouth 28 connected to the second suction duct 42. Furthermore, with such an embodiment, the first opening 51A and the second opening 52A are not both opened in the same time period, so that the energy consumption of the blower 45 can be further reduced.

[0074] For example, the machine controller 15 may control the opening and closing operations of the first shutter 51 and the second shutter 52 so that there is a time period in which both the first opening 51A and the second opening 52A are closed between the time period in which the first opening 51A is open and the time period in which the second opening 52A is open. In other words, the machine controller 15 may control the opening and closing operations of the first shutter 51 and the second shutter 52 so that when the first opening 51A is switched from an open state to a closed state, the second opening 52A is not immediately (without a time gap) switched from a closed state to an open state. In further other words, the machine controller 15 may control the opening and closing operations of the first shutter 51 and the second shutter 52 so that when the second opening 52A is opened, a predetermined time gap is allowed after the first opening 51A is switched from an open state to a closed state, and when the first opening 51A is opened, a predetermined time gap is allowed after the second opening 52A is switched from an open state to a closed state. According to this embodiment, the time period during which both the first opening 51A and the second opening 52A are closed is ensured, so that the amount of energy consumed by the blower 45 can be further reduced.

[0075] For example, the machine controller 15 may store at least one of the number of times the yarn Y is broken between the air spinning device 7 and the winding device 13 and the number of times the yarn joining device 26 has performed. The breakage of the yarn Y occurs when the yarn monitoring device 8 and / or the tension sensor 9 detects a yarn defect and the spinning by the air spinning device 7 is interrupted. The number of breaks related to this event corresponds to, for example, the number of times a yarn defect is detected. The breakage of the yarn Y may also occur when excessive tension is applied to the yarn Y in the spinning unit 2 for some reason. The number of breaks related to this event corresponds to, for example, the number of times a no-yarn detection signal is output from a yarn travel detection sensor (not shown) provided between the yarn storage device 11 and the winding device 13. Alternatively, in either event, a yarn joining request signal is transmitted from the unit controller 10, so the machine controller 15 may store the number of times the yarn joining request signal is received as the number of breaks, or the number of times a control signal is transmitted to the carriage controller 32 as the number of yarn joining. The machine controller 15 may control the opening and closing operations of the first shutter 51 and the second shutter 52 based on at least one of the stored number of times of segmentation and the number of times of yarn joining. In this embodiment, when the second suction duct 42 is in a state in which waste yarn is likely to accumulate, the second shutter 52 is opened, and the flow rate of the second suction duct 42 can be increased. In other words, in this embodiment, the second shutter 52 can be opened and closed at an appropriate timing.

[0076] For example, the machine controller 15 may control the opening and closing operations of the first shutter 51 and the second shutter 52 when the yarn joining operation is not being performed by the yarn joining device 26. In such an embodiment, the opening and closing operations are not performed during the yarn joining operation, so that the yarn joining operation can be stably performed.

[0077] For example, the machine controller 15 may control the opening and closing operation of at least one of the first shutter 51 and the second shutter 52 based on the spinning conditions in the air spinning device 7. Here, if the spinning conditions such as the yarn type, yarn thickness, and spinning speed can be grasped, the amount of waste yarn generated during the yarn joining operation can be predicted. In such an embodiment, the opening operation of the first shutter 51 and the second shutter 52 can be executed at an appropriate timing based on the predicted amount of waste yarn. As a result, accumulation of waste yarn in the first suction duct 41 and the second suction duct 42 can be more reliably prevented.

[0078] The display screen (notification unit) 16 of the second end frame 5 notifies the operator that the collection box 48 needs to be cleaned. When the static pressure detected by the first static pressure sensor 48A falls below a predetermined value, the machine controller 15 causes the display screen 16 to notify the operator that the collection box 48 needs to be cleaned. Note that, in order to notify the operator that the collection box 48 needs to be cleaned, for example, a lamp provided on the second end frame 5 or the like may be made to flash.

[0079] As a result, when the worker sees the display screen 16 indicating that the collection box 48 needs to be cleaned, he or she rotates the lever 47A as shown in Figures 6(B) and 6(C). This switches the mode of the collection box 48 from the collection mode to the cleaning mode, and the door 49 becomes openable. This allows the worker to remove the waste yarn from the collection box 48. If the machine controller 15 executes at least one of the first opening operation and the second opening operation when the static pressure detected by the first static pressure sensor 48A falls below a predetermined value, the waste yarn accumulated in the first suction duct 41 or the second suction duct 42 can be collected in the collection box 48 before the worker cleans the collection box 48 (removes the waste yarn).

[0080] Although one embodiment has been described above, one aspect of the present invention is not limited to the above embodiment, and various modifications are possible without departing from the spirit and scope of the invention.

[0081] In addition to the configuration of the above embodiment, the spinning machine 1 may include at least one of a second static pressure sensor (first detection unit) 41S that detects the static pressure of the first suction duct 41 and a third static pressure sensor (second detection unit) 42S that detects the static pressure of the second suction duct 42. The static pressure here is a pressure detected in a state in which the first opening 51A and the second opening 52A are closed. In this case, the machine controller 15 may prohibit the opening and closing operation of the first shutter 51 when the static pressure detected by the second static pressure sensor 41S is below a predetermined value, and may prohibit the opening and closing operation of the second shutter 52 when the static pressure detected by the third static pressure sensor 42S is below a predetermined value. The second static pressure sensor 41S may be disposed inside the first suction duct 41, for example, at a position close to (adjacent to) the first opening 51A. The third static pressure sensor 42S may be disposed inside the second suction duct 42, for example, at a position close to (adjacent to) the second opening 52A.

[0082] With this modification, the opening and closing operation of the first shutter 51 or the second shutter 52 is prohibited when the static pressure of the first suction duct 41 or the second suction duct 42 is decreasing due to the yarn splicing operation being performed by the yarn splicing cart 3. This prevents the static pressure of the first suction duct 41 or the second suction duct 42 from further decreasing.

[0083] In the above embodiment and modified example, the suction nozzle 27 and the suction mouth 28 are connected to the carriage-side duct 35, and the fourth shutter 53 is provided between the carriage-side duct 35 and the second suction duct 42. However, instead of or in addition to this configuration, a third shutter 11H may be provided between the suction mechanism 11F and the first suction duct 41. In this case, the third shutter 11H is configured to be openable and closable depending on whether the suction mechanism 11F is operating or not, and is configured to close when the suction mechanism 11F is not operating. The opening and closing operation of the third shutter 11H is controlled by the machine controller 15.

[0084] In such a configuration of the third shutter 11H and the fourth shutter 53, the suction mechanism 11F communicates with the first suction duct 41 and the suction nozzle 27 and the suction mouth 28 communicate with the second suction duct 42 only when necessary, thereby making it possible to avoid unnecessary drops in static pressure in the first suction duct 41 and the second suction duct 42. Furthermore, with the above-mentioned embodiment and modified examples, the yarn joining operation by the yarn joining device 26 can be stably performed and the energy consumption of the blower 45 can be reduced.

[0085] In the above embodiment and modified example, the suction mechanism 11F included in the yarn pooling device 11 has been described as an example of the first suction device connected to the first suction duct 41, but the present invention is not limited thereto. Instead of or in addition to the configuration including the suction mechanism 11F, for example, as shown in FIG. 8, a suction device 70 may be provided that can suck the yarn Y on the winding device 13 side when the yarn Y is cut. The suction port 71 of the suction device 70 is provided between the yarn pooling device 11 and the winding device 13. The suction device 70 has the suction port 71 and a third shutter 72 that switches between communication with the first suction duct 41 (presence or absence of suction at the suction port 71). In this modified example, the suction device 70 is fixed to the spinning unit 2, but may be provided to be somewhat movable. The opening and closing operation of the third shutter 72 is controlled by the machine controller 15 (or the unit controller 10).

[0086] 8, only the suction device 70 is shown connected to the first suction duct 41, but the suction mechanism 11F may also be connected thereto. In this case, the third shutter 11H (72) may be shared by the suction mechanism 11F and the suction device 70.

[0087] The suction port 71 of the suction device 70 is located upstream of the yarn splicing device 26 provided on the yarn splicing cart 3. When the yarn Y is broken between the air spinning device 7 and the winding device 13, the suction device 70 captures the yarn Y on the winding device 13 side, in other words, the package P side. When the yarn Y is broken, the suction device 70 or the suction mouth 28 is alternatively selected to capture the yarn Y on the winding device 13 side. In general, the amount of waste yarn sucked by the suction nozzle 27 is greater than the amount of waste yarn sucked by the suction device 70, and waste yarn is more likely to accumulate in the second suction duct 42 than in the first suction duct 41. Even in this modified example, the opening and closing operations of the first shutter 51 and the second shutter 52 may be controlled so that the opening and closing frequency of the second shutter 52 is higher than the opening and closing frequency of the first shutter 51. As a result, the frequency at which the flow rate of the second suction duct 42 is higher than that of the first suction duct 41 can be increased, and therefore accumulation of waste yarn in the second suction duct 42 can be avoided.

[0088] In the above embodiment and modified example, an example in which a plurality of yarn splicing carriages 3 are provided has been described. However, a configuration in which only one yarn splicing carriage 3 is provided may also be used.

[0089] In the above embodiment and modified examples, for example, the suction mechanism 11F and the third shutter 11H, 72 are controlled by the machine controller 15. However, they may be configured to be controlled by the unit controller .

[0090] In the above embodiment and modified example, it has been described that the first suction duct 41 and the second suction duct 42 suck in waste yarn. However, the concept of "waste yarn" may include fluff.

[0091] In the above embodiment and modified example, the spinning machine 1 including the air spinning device 7 has been described as an example of a yarn winding machine. The yarn winding machine according to one aspect of the present invention is not limited to the above spinning machine 1 and may be, for example, an open-end spinning machine or an automatic winder. [Explanation of symbols]

[0092] 1... spinning machine (yarn winding machine), 2... spinning unit (winding unit), 2A... main frame, 3... yarn splicing cart (cart), 4... first end frame, 5... second end frame, 7... air spinning device (spinning device), 10... unit controller, 11... yarn storage device, 11F... suction mechanism (first suction device), 11Fa... suction port, 15... machine controller (control unit), 16... display screen (notification unit), 26... yarn splicing device, 27... suction nozzle (second suction device), 28... suction mouth (second suction device), 32... cart controller, 40... suction air flow supply mechanism , 41...first suction duct, 41R...first end, 41L...second end, 41S...second static pressure sensor (first detection unit), 42...second suction duct, 42R...third end, 42L...fourth end, 42S...third static pressure sensor (second detection unit), 45...blower, 48...recovery box, 48A...first static pressure sensor (third detection unit), 51...first shutter, 51A...first opening, 52...second shutter, 52A...second opening, 53...fourth shutter, 61...air cylinder, 62...connecting plate, 63...closing plate, 65...cover plate, 65a...through hole, 70...suction device (first suction device), Y...thread.

Claims

1. a plurality of winding units each including a yarn supplying device that supplies a yarn, a winding device that winds the yarn supplied from the yarn supplying device to form a package, and a first suction device that sucks in at least one of the yarn and waste yarn generated from the yarn; a carriage having a second suction device that sucks at least one of the yarn and the waste yarn and that is movable along an arrangement direction of the plurality of winding units; a first suction duct to which the first suction device is connected and which extends from a first end to a second end in the arrangement direction; a second suction duct to which the second suction device is connected and which extends from the third end to the fourth end in the arrangement direction; a blower connected to the first end of the first suction duct and the third end of the second suction duct via a collection box in which the waste yarn is collected, the blower generating a suction air flow in the first suction duct and the second suction duct; a first shutter configured to open and close a first opening formed at a second end of the first suction duct; a second shutter configured to open and close a second opening formed at a fourth end of the second suction duct; a control unit that controls opening and closing of the first shutter in a first opening operation that opens the first opening, and opening and closing of the second shutter in a second opening operation that opens the second opening, The control unit controls opening and closing of the first shutter and the second shutter so that at least one of start timings of the first opening operation and the second opening operation and end timings of the first opening operation and the second opening operation are shifted from each other.

2. The yarn winding machine according to claim 1 , wherein the control unit controls opening and closing operations of the first shutter and the second shutter such that a time period during which the first opening is open and a time period during which the second opening is open do not overlap with each other.

3. 3. The yarn winding machine according to claim 2, wherein the control unit controls opening and closing operations of the first shutter and the second shutter such that a time period during which both the first opening and the second opening are closed exists between a time period during which the first opening is open and a time period during which the second opening is open.

4. one or more of the carriages having a yarn splicing device that splices the yarn that is cut between the yarn supplying device and the winding device; The yarn winding machine according to any one of claims 1 to 3, wherein the control unit controls opening and closing operations of the first shutter and the second shutter based on at least one of a number of times the yarn is interrupted between the yarn supplying device and the winding device and a number of times the yarn is joined by the yarn joining device.

5. The yarn winding machine according to claim 4 , wherein the control unit controls the first shutter and the second shutter to be opened and closed when the yarn joining device is not performing a yarn joining operation.

6. At least one of a first detection unit that detects a static pressure of the first suction duct and a second detection unit that detects a static pressure of the second suction duct, The yarn winding machine according to any one of claims 1 to 5, wherein the control unit prohibits an opening and closing operation of the first shutter when the static pressure detected by the first detection unit is below a predetermined value, and prohibits an opening and closing operation of the second shutter when the static pressure detected by the second detection unit is below a predetermined value.

7. at least one of a third shutter provided between the first suction device and the first suction duct and a fourth shutter provided between the second suction device and the second suction duct, the third shutter is configured to be openable and closable depending on whether the first suction device is operating or not, and is closed when the first suction device is not operating, The yarn winding machine according to any one of claims 1 to 6, wherein the fourth shutter is configured to be openable and closable depending on whether the second suction device is operating or not, and is closed when the second suction device is not operating.

8. The first suction device suctions the yarn on the winding device side, The second suction device sucks the yarn on the yarn supplying device side, The yarn winding machine according to any one of claims 1 to 7, wherein the control unit controls the opening and closing operations of the first shutter and the second shutter so that the opening and closing frequency of the second shutter is higher than the opening and closing frequency of the first shutter.

9. The yarn winding machine according to claim 1 , wherein the control unit controls an opening / closing operation of at least one of the first shutter and the second shutter based on a spinning condition in the yarn supplying device.

10. a third detection unit that detects a static pressure of the suction air flow in the collection box; A notification unit that notifies the user that the collection box needs to be cleaned, The yarn winding machine according to any one of claims 1 to 9, wherein, when the static pressure detected by the third detection unit becomes equal to or lower than a predetermined value, the control unit causes the notification unit to notify that cleaning of the collection box is necessary, and executes at least one of the first opening operation and the second opening operation.

11. A portion of the first opening is formed below in a height direction of an inner cross section of the first suction duct, The yarn winding machine according to any one of claims 1 to 10, wherein a portion of the second opening is formed lower in a height direction of an inner cross section of the second suction duct.

Images