Air-jet spinning machine

Abstract

The air-jet spinning machine of the present invention performs self-spinning by causing a rotating airflow to act on a fiber bundle to generate a new short fiber yarn and then transporting the generated short fiber yarn downstream. The air-jet spinning machine includes a drafting device, an air-jet spinning device, a suction tube, and a control device. The drafting device drafts the yarn to generate a fiber bundle. The air-jet spinning device performs self-spinning. The suction tube attracts and captures the short fiber yarn generated by the air-jet spinning device. The control device determines the timing of the suction tube's operation based on at least one of the yarn speed (the travel speed of the short fiber yarn generated by the air-jet spinning device) and the drafting conditions in the drafting device.

Description

Technical Field

[0001] This invention relates to an air-jet spinning machine equipped with an air-jet spinning device. Background Technology

[0002] Previously, air-jet spinning machines that employ a yarn attraction and capture device to attract and capture yarn from an air-jet spinning device were known. Japanese Patent Application Publication No. 2018-53373 (Patent Document 1) discloses such an air-jet spinning machine.

[0003] The spinning machine of Patent Document 1 includes: a first capturing and guiding device for capturing a first yarn from an air-jet spinning device and guiding it to a splicing device; and a second capturing and guiding device for capturing a second yarn from a winding device and guiding it to the splicing device. Thus, this spinning machine can perform a splicing operation on the ends of the cut yarn when a breakage occurs or the yarn is cut by a yarn clearer. After the second capturing and guiding device reaches a predetermined position, the first capturing and guiding device captures the first yarn at the first yarn capturing position and moves to the first yarn guiding position.

[0004] In the spinning machine of Patent Document 1, the standby time of the first capturing and guiding device may be longer due to the operating time of the second capturing and guiding device. As a result, the splicing cycle time until the splicing operation is completed becomes longer. In addition, during the standby period of the first capturing and guiding device, the yarn generated in the air-jet spinning device becomes unnecessary, thus increasing waste yarn. Summary of the Invention

[0005] The purpose of this invention is to provide an air-jet spinning machine that can activate the first yarn attraction and capture device at an efficient time, thereby improving operating efficiency and reducing waste yarn.

[0006] According to the present invention, an air-jet spinning machine with the following structure is provided. That is, the air-jet spinning machine generates new yarn by acting a rotating airflow on a fiber bundle, and conveys the generated yarn to a downstream self-spun yarn. The aforementioned air-jet spinning machine includes a drafting device, an air-jet spinning device, a first yarn attraction and capture device, and a control unit. The aforementioned drafting device drafts the raw material to generate the aforementioned fiber bundle. The aforementioned air-jet spinning device performs the aforementioned self-spun yarn. The aforementioned first yarn attraction and capture device attracts and captures the aforementioned yarn generated by the aforementioned air-jet spinning device. The aforementioned control unit changes the cycle time of the cycle including the operation of the aforementioned first yarn attraction and capture device based on at least one of the yarn speed (the travel speed of the aforementioned yarn generated by the aforementioned air-jet spinning device) and the drafting conditions in the aforementioned drafting device.

[0007] Therefore, the above cycle can be appropriately implemented according to the yarn speed and / or drafting conditions, which can improve the operating efficiency of the first yarn attraction and capture device and reduce the amount of waste yarn.

[0008] Based on the aforementioned air-jet spinning machine, it is preferable that the aforementioned control unit determines the timing of the operation of the aforementioned first yarn attraction and capture device and changes the aforementioned cycle time based on at least one of the yarn speed, which is the travel speed of the aforementioned yarn generated by the aforementioned air-jet spinning device, and the drafting conditions in the aforementioned drafting device.

[0009] Therefore, once the first yarn attraction and capture device becomes operational (e.g., the yarn has traveled to a predetermined position), it can be activated immediately. As a result, operations related to self-spinning can be performed smoothly and without errors, and unnecessary waiting time can be eliminated, thus improving operational efficiency. Furthermore, shortening the self-spinning time reduces the amount of waste yarn.

[0010] Based on the aforementioned air-jet spinning machine, it is preferable that the aforementioned control unit determines the start timing of the attraction action based on the aforementioned first yarn attraction and capture device, and changes the aforementioned cycle time, based on at least one of the aforementioned yarn speed and the aforementioned drafting conditions.

[0011] This allows the attraction action of the first yarn attraction and capture device to begin earlier. Therefore, it enables improved operating efficiency and reduced waste yarn.

[0012] Based on the aforementioned air-jet spinning machine, preferably, the aforementioned control unit determines, based on at least one of the aforementioned yarn speed and the aforementioned drafting conditions, the starting time for the aforementioned first yarn attraction and capture device to move from the yarn capture position capturing the aforementioned yarn toward the target position that guides the captured aforementioned yarn to its destination, and changes the aforementioned cycle time.

[0013] Therefore, once a state is reached where the probability of yarn being captured by the first yarn attraction and capture device is high, yarn guidance based on the first yarn attraction and capture device can begin immediately. This results in improved operating efficiency and reduced waste yarn.

[0014] Based on the aforementioned air-jet spinning machine, it is preferable that the aforementioned control unit controls the attraction action of the aforementioned first yarn attraction and capture device and moves the aforementioned yarn captured by the aforementioned attraction action toward the target position as the destination for guidance.

[0015] Therefore, it is possible to appropriately control the start timing of the attraction action based on the first yarn attraction and capture device and the start timing of the movement towards the target position, thereby improving operating efficiency and reducing waste yarn.

[0016] Based on the aforementioned air-jet spinning machine, the following structure is preferred: The drafting device includes a first roller disposed upstream of the drafting direction of the raw material for transporting the raw material. The control unit initiates the self-spinning based on the aforementioned air-jet spinning device after a period based on at least one of the yarn speed and the drafting conditions, starting from the rotation of the first roller.

[0017] Therefore, once drafting based on the drafting device has substantially begun and the fiber bundle has been guided into the interior of the air-jet spinning device, self-spinning can start immediately. This results in improved operating efficiency and reduced waste yarn.

[0018] The aforementioned air-jet spinning machine preferably has the following structure: The aforementioned air-jet spinning device includes a spinning nozzle. The aforementioned air-jet spinning device injects air from the aforementioned spinning nozzle into a spinning chamber formed inside the aforementioned air-jet spinning device. The period from the start of the rotation of the aforementioned first roller to the start of the air injection action from the aforementioned spinning nozzle is determined based on at least one of the aforementioned yarn speed and the aforementioned drafting conditions.

[0019] Therefore, once the fiber bundle is in a state where there is a high probability of it reaching the air-jet spinning device, the air jet action based on the spinning nozzle can be started immediately, thus enabling smooth yarn generation and improving operating efficiency.

[0020] The aforementioned air-jet spinning machine preferably has the following structure. That is, the aforementioned drafting conditions include at least one of the total draft ratio, main draft ratio, back zone draft ratio, feed ratio, and spacing width.

[0021] Therefore, the air-jet spinning machine can change the aforementioned cycle time based on appropriate conditions.

[0022] The aforementioned air-jet spinning machine preferably includes a setting unit for setting the aforementioned yarn speed and / or the aforementioned drafting conditions.

[0023] This allows operators to set the desired yarn speed and / or drafting conditions.

[0024] The aforementioned air-jet spinning machine preferably has the following structure: It includes a yarn winding device, a second yarn attraction and capture device, and a splicing device. The yarn winding device winds the yarn generated by the air-jet spinning device to form a package. The second yarn attraction and capture device attracts and captures the yarn from the yarn winding device. The splicing device performs a splicing operation to join the yarn attracted and captured by the first and second yarn attraction and capture devices. The splicing operation based on the splicing device is performed after the self-spinning based on the air-jet spinning device is completed.

[0025] Therefore, the splicing cycle can be performed smoothly and without errors, depending on the yarn speed and / or drafting conditions, and the cycle time can be shortened.

[0026] Based on the aforementioned air-jet spinning machine, the following structure is preferred: The air-jet spinning machine includes multiple spinning units and a splicing carriage. The splicing carriage travels relative to the multiple spinning units. Each spinning unit is equipped with the aforementioned drafting device and the aforementioned air-jet spinning device. The splicing carriage is equipped with the aforementioned first yarn attraction and capture device, the aforementioned second yarn attraction and capture device, and the aforementioned splicing device.

[0027] That is, the above-described structure, which can shorten the cycle time at splicing, is particularly advantageous when multiple spinning units share the splicing trolley. Once the splicing trolley has completed its work in one spinning unit, it can begin work in another spinning unit earlier than before.

[0028] Based on the aforementioned air-jet spinning machine, the following structure is preferred: The air-jet spinning machine includes multiple spinning units and a doffing trolley. The doffing trolley travels relative to the multiple spinning units. Each spinning unit is equipped with the aforementioned drafting device and the aforementioned air-jet spinning device. Each spinning unit winds the yarn generated by the aforementioned air-jet spinning device to form a package. The doffing trolley doffs the fully loaded package. The aforementioned first yarn attraction and capture device is provided on the doffing trolley.

[0029] This shortens the doffing cycle time. This is particularly advantageous in structures where multiple spinning units share the doffing trolley. Once the doffing trolley has finished its work in one spinning unit, it can begin work in another spinning unit earlier than before. Attached Figure Description

[0030] Figure 1 This is a front view showing the overall structure of a spinning machine according to one embodiment of the present invention.

[0031] Figure 2 It is a side view showing the spinning unit, the splicing trolley, and the doffing trolley.

[0032] Figure 3 It is a cross-sectional view showing the internal structure of an air-jet spinning device.

[0033] Figure 4 It is a timing diagram of the actions of the first nozzle, suction tube, etc. when the connector is connected. Detailed Implementation

[0034] Next, with reference to the accompanying drawings, a worsted spinning machine (air-jet spinning machine) 100 according to one embodiment of the present invention will be described. In the following description, "upstream" and "downstream" refer to the upstream and downstream directions of the yarn (raw material) S, the fiber bundle F, and the short fiber yarn Y during the winding of the short fiber yarn (yarn) Y.

[0035] Figure 1 The spinning machine 100 shown includes a prime mover housing 80, spinning units 1, a splicing carriage 6, and a doffing carriage 7. The spinning units 1 are arranged in a row and there are multiple of them.

[0036] Although not shown in the figure, the spinning machine 100 is equipped with a blower housing. Inside the blower housing is a negative pressure source that generates negative pressure. The negative pressure generated by the negative pressure source is supplied to each spinning unit 1, the splicing carriage 6, and the doffing carriage 7 via ventilation ducts (omitted in the figure).

[0037] A management device 9 is provided in the prime mover housing 80. The management device 9 can communicate with the unit control unit 50 (described later) of each spinning unit 1. One unit control unit 50 may be provided for every predetermined number of spinning units 1.

[0038] Furthermore, the management device 9 can communicate with the respective carriage control units (omitted in the figure) of the splicing carriage 6 and the doffing carriage 7. The management device 9 communicates with the unit control unit 50 and the carriage control unit, thereby enabling centralized management of information from each spinning unit 1, splicing carriage 6, and doffing carriage 7.

[0039] Management device 9, such as Figure 1 As shown, it includes a display 91, an input device 92, and a control device (control unit) 90.

[0040] The display 91 shows information such as the operating status, yarn quality, and spinning conditions of each spinning unit 1. The input device 92 has multiple input keys that can be operated by the operator. The input device 92 is used to select the information displayed on the display 91 and to set the spinning conditions of the spinning machine 100. The display 91 and the input device 92 can also be integrated into a touch panel display.

[0041] The spinning conditions of the spinning machine 100 include, for example, the yarn speed, which is the travel speed of the short fiber yarn Y generated by the air-jet spinning device 3, and / or the drafting conditions of the drafting device 2 (described later) provided in the spinning unit 1. In this embodiment, the yarn speed is the travel speed of the short fiber yarn Y between the air-jet spinning device 3 and the yarn take-up device (yarn storage roller 11a, or clamping roller and output roller described later). The spinning conditions can be set automatically according to the type of yarn selected by the operator, or they can be set manually by the operator.

[0042] The control device 90 is configured as a known computer. The control device 90 includes a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), and HDD (Hard Disk Drive), etc. (not shown).

[0043] Based on pre-set spinning conditions, the control device 90 determines the operating timings of each component of the spinning unit 1, the splicing carriage 6, and the doffing carriage 7. The control device 90 then sends the determined operating timings of each component of the spinning unit 1 to the respective unit control unit 50 that controls each spinning unit 1. Furthermore, the control device 90 sends the operating timings of each component to the respective carriage control units that control the splicing carriage 6 and the doffing carriage 7. Details regarding the operating timings of each component will be described later.

[0044] Each spinning unit 1 as follows Figure 1 and Figure 2 As shown, the spinning unit 1 mainly includes a drafting device 2, an air-jet spinning device 3, a yarn winding device 4, and a unit control unit 50. In the spinning unit 1, the drafting device 2, the air-jet spinning device 3, and the yarn winding device 4 are arranged sequentially from upstream to downstream.

[0045] The drafting device 2 is located near the upper end of the frame 10 of the spinning machine 100. The drafting device 2 is as follows: Figure 2 As shown, the device has four drafting rollers. These four drafting rollers consist of a rear roller (first roller) 21, a third roller 22, a middle roller 23, and a front roller 24. In the drafting device 2, the rear roller 21, the third roller 22, the middle roller 23, and the front roller 24 are arranged sequentially from the upstream side. The drafting device 2 also includes four opposing rollers positioned opposite each of the four drafting rollers. A rubber belt 25 is wound around the middle roller 23 and its opposing rollers.

[0046] The drafting device 2 clamps and transports the yarn S supplied from the yarn box (omitted in the figure) between the drafting roller and its opposing roller, thereby lengthening (drafting) it to a specified fiber amount (or thickness) and generating a fiber bundle F. The fiber bundle F generated in the drafting device 2 is supplied to the air-jet spinning device 3, where it is spun. As a result, a short fiber yarn Y is generated.

[0047] In this embodiment, each drafting roller in the drafting device 2 is driven by an independent electric motor (not shown). This allows for independent adjustment of the rotational speed of each drafting roller. The operation of each electric motor driving the drafting rollers is controlled by the unit control unit 50. The middle roller 23 can also be configured to be driven simultaneously in multiple spinning units 1. The front roller 24 can also be configured to be driven simultaneously in multiple spinning units 1.

[0048] In the drafting device 2, the rotational speed of each drafting roller is set to increase as it moves downstream. As a result, the fiber bundle F is transported and drafted between the drafting roller and its opposing roller, and the fiber bundle F becomes finer as it moves downstream. The rotational speed of each drafting roller is set based on the yarn speed input by the operator via the input device 92 and the drafting conditions described later.

[0049] By appropriately setting the rotational speed of each drafting roller, the stretching ratio of the fiber bundle F can be changed. This allows the air-jet spinning apparatus 3 to be supplied with a fiber bundle F that has been drafted to the desired thickness. Hereinafter, this stretching ratio will be referred to as the "draft ratio".

[0050] Here, the drafting conditions of the drafting device 2, including the aforementioned draft ratios, will be briefly explained. Drafting conditions include, for example, total draft ratio (TDR), main draft ratio (MDR), back zone draft ratio (BDR), feed ratio, and spacing width. Various drafting conditions are set according to the type and fineness of the short fiber yarn Y produced by the spinning machine 100.

[0051] The total draft ratio is the ratio of the circumferential speed of the front roller 24 to the circumferential speed of the rear roller 21. That is, total draft ratio = (circumferential speed of the front roller 24) / (circumferential speed of the rear roller 21).

[0052] The main draft ratio is the ratio of the circumferential speed of the front roller 24 to the circumferential speed of the middle roller 23. That is, the main draft ratio = (circumferential speed of the front roller 24) / (circumferential speed of the middle roller 23).

[0053] The back zone draft ratio is the ratio of the circumferential speed of the third roller 22 to the circumferential speed of the back roller 21. That is, back zone draft ratio = (circumferential speed of the third roller 22) / (circumferential speed of the back roller 21).

[0054] By adjusting the rotational speed (circumferential speed) of each drafting roller, the draft ratio (and even the thickness of the resulting fiber bundle F or short fiber yarn Y) can be changed. Furthermore, the aforementioned draft ratios are not limited to being calculated as described above; for example, they can also be calculated based on the amount or number of fibers introduced between each drafting roller and its opposing roller.

[0055] The spacing width is the distance between two adjacent drawing rollers in the direction of travel of the fiber bundle F (specifically, for example, the distance between the axes of two adjacent drawing rollers). Adjusting this spacing width allows for changing the transport distance of the fiber bundle F carried by the drawing rollers.

[0056] The feed ratio is the ratio of the circumferential speed of the front roller 24 to the circumferential speed of the yarn accumulation roller 11a (described later). That is, feed ratio = (circumferential speed of the front roller 24) / (circumferential speed of the yarn accumulation roller 11a).

[0057] The air-jet spinning device 3 is located immediately downstream of the front roller 24. The air-jet spinning device 3 uses a rotating airflow to twist the fiber bundle F supplied from the drafting device 2 to produce short fiber yarn Y.

[0058] Airflow spinning device 3 Figure 3 As shown, the device includes a nozzle block 30 and a hollow guide shaft 34. The nozzle block 30 includes a fiber guide section 31, a spinning chamber 32, and a first nozzle (spinning nozzle) 33. The hollow guide shaft 34 includes a yarn passage 35 and a second nozzle 36. Each part of the airflow spinning device 3 is controlled by a unit control unit 50. Figure 3 In the illustration, the nozzle block 30 is shown as consisting of multiple parts, but it can also consist of a single part.

[0059] The fiber guide 31 is a component that guides the fiber bundle F, which has been drafted by the drafting device 2, toward the interior (spinning chamber 32) of the air-jet spinning device 3. The air-jet spinning device 3 injects air from the first nozzle 33 into the spinning chamber 32, causing the rotating airflow to act on the fiber bundle F inside the spinning chamber 32.

[0060] The hollow guide shaft 34 is a cylindrical component with a yarn passage 35 formed inside. The airflow spinning device 3 injects air into the yarn passage 35 from the second nozzle 36, thereby generating a rotating airflow within the yarn passage 35. The rotating airflow generated in the yarn passage 35 is in the opposite direction to the rotating airflow in the spinning chamber 32.

[0061] The air-jet spinning apparatus 3, configured as described above, can perform both self-spinning and conventional spinning. Self-spinning refers to the spinning action in which a rotating airflow acts on the fiber bundle F within the air-jet spinning apparatus 3 to generate new short fiber yarn Y, and then the generated short fiber yarn Y is conveyed downstream. Conventional spinning refers to the spinning action that, after self-spinning, continuously generates short fiber yarn Y wound by the yarn winding device 4.

[0062] Unlike regular spinning, yarn exit spinning is a transitional and temporary spinning process that occurs at the start or restart of short fiber yarn Y generation in the air-jet spinning device 3. In the case of yarn exit spinning, the air-jet spinning device 3 does not initially eject air from the first nozzle 33, but instead ejects air from the second nozzle 36, creating a rotating airflow within the yarn passage 35. The fiber bundle F supplied from the drafting device 2 is guided by the fiber guide 31 into the interior of the air-jet spinning device 3. This fiber bundle F is then conveyed towards the hollow guide shaft 34.

[0063] The yarn passage 35 is configured such that the cross-sectional area on the downstream side is larger than that on the upstream side, thus the rotating airflow within the yarn passage 35 flows towards the downstream side. This allows the fiber bundle F to be delivered downstream of the yarn passage 35. Then, air is injected from the first nozzle 33, based on the second nozzle 36. The fiber bundle F is spun into a finished fiber shape by the air injected from the first nozzle 33 and the second nozzle 36, and is discharged from the hollow guide shaft 34. During the yarn spinning process, there is almost no tension from the downstream side of the airflow spinning device 3 that stretches the short fiber yarn Y; even if there is, it is only a weak tension caused by the suction airflow from the suction tube 63, which will be described later.

[0064] In the exit spinning process, in order to reliably deliver the fiber bundle F (or short fiber yarn Y) into the downstream yarn passage 35 via the rotating airflow generated by air jetting from the second nozzle 36, a suitable amount of fiber bundle F needs to be supplied to the air-jet spinning device 3. Therefore, in the exit spinning process, a short fiber yarn Y with a different thickness (exit yarn thickness) than the short fiber yarn Y normally spun is produced. In the following description, the short fiber yarn Y generated by the exit spinning process will be referred to as "exit short fiber yarn".

[0065] In the yarn exit spinning process, the drafting rollers, such as the rear roller 21, are rotated at various rotational speeds (sometimes referred to as starting speeds in the following description) corresponding to the yarn exit thickness. Thus, during yarn exit spinning, a fiber bundle F of constant thickness is supplied to the air-jet spinning device 3, generating a short fiber yarn. After yarn exit spinning is completed, the rotational speeds of the individual drafting rollers are adjusted to achieve the desired thickness of the short fiber yarn Y for normal spinning. As a result, normal spinning begins. In the following description, the short fiber yarn Y generated in this normal spinning process will be referred to as "normal yarn".

[0066] The difference in yarn thickness between short-fiber yarn and regular yarn can be achieved by setting the start-up rate. The start-up rate is the ratio of the circumferential speed of the back roller 21 during yarn feeding in the air-jet spinning unit 3 to the circumferential speed of the back roller 21 during normal spinning. The start-up rate is the same as the drafting condition, and the operator can input it to the management device 9 using the input device 92.

[0067] In this embodiment, the start-up rate is expressed as a percentage. That is, the start-up rate (%) = {(circumferential speed of the back roller 21 during yarn feeding and spinning) / (circumferential speed of the back roller 21 during normal spinning)} × 100.

[0068] During normal spinning, air is ejected from the first nozzle 33, but not from the second nozzle 36. In this state, the rotating airflow generated by the first nozzle 33 within the spinning chamber 32 oscillates around the rear end of the fiber bundle F supplied from the drafting device 2 around the front end of the hollow guide shaft 34. This twists the fiber bundle F to produce a short fiber yarn Y. The short fiber yarn Y passes through the yarn passage 35 of the hollow guide shaft 34 and is discharged from the downstream yarn outlet (not shown) to the outside of the airflow spinning device 3.

[0069] The short-fiber yarn Y wound on package 45 is a normal yarn. The exiting short-fiber yarn is generated under transitional conditions different from the normal yarn, and therefore is ultimately discarded as waste yarn. Therefore, from the viewpoint of reducing waste yarn, it is preferable to shorten the time for exiting the spinning process.

[0070] The yarn winding device 4 includes a rocker arm 41, a winding drum 42, and a traverse yarn guide 43. The rocker arm 41 is supported so as to be able to swing about a support shaft 44, and can support the bobbin 15 (i.e., package 45) for winding the short fiber yarn Y so as to be rotatable. The winding drum 42 rotates in contact with the outer peripheral surface of the aforementioned bobbin 15 or the outer peripheral surface of the package 45, thereby driving the package 45 to rotate in the winding direction. The yarn winding device 4 uses a driving means (omitted in the figure) to reciprocate the traverse yarn guide 43, and drives the winding drum 42 using an electric motor (omitted in the figure). Thus, the yarn winding device 4 winds the short fiber yarn Y into the package 45 while winding the short fiber yarn Y.

[0071] In each spinning unit 1, a yarn storage device 11 and a yarn monitoring device 12 are provided between the air-jet spinning device 3 and the yarn winding device 4.

[0072] The yarn storage device 11 is located downstream of the airflow spinning device 3. The yarn storage device 11 is as follows: Figure 2 As shown, it includes a yarn storage roller 11a, a motor 11b that drives the yarn storage roller 11a, a yarn guide hook component 11c, and a yarn tail removal bar (yarn retraction component) 11d.

[0073] The yarn accumulation roller 11a winds and temporarily accumulates a certain amount of short fiber yarn Y on its outer peripheral surface. When the yarn accumulation roller 11a has the short fiber yarn Y wound on its outer peripheral surface, it rotates at a predetermined rotational speed, thereby drawing the short fiber yarn Y out from the air-jet spinning device 3 at a predetermined speed and transporting it downstream.

[0074] A residual yarn removal device (not shown in the figure) is provided near the yarn accumulation roller 11a. The residual yarn removal device has a front end formed in a tubular shape. When a short fiber yarn Y breaks for some reason during winding, and short fiber yarn Y remains on the yarn accumulation roller 11a, the residual yarn removal device can attract and remove the residual yarn wound on the yarn accumulation roller 11a by means of an attraction airflow generated at its front end and inside.

[0075] A yarn guide hook component 11c is mounted on the downstream end of the yarn storage roller 11a. The yarn guide hook component 11c is supported so as to be rotatable relative to the yarn storage roller 11a. The yarn guide hook component 11c rotates integrally with the yarn storage roller 11a while hooking the short fiber yarn Y, thereby guiding the short fiber yarn Y to the outer peripheral surface of the yarn storage roller 11a.

[0076] The yarn tail removal lever 11d is located near the downstream end of the yarn storage roller 11a. The yarn tail removal lever 11d is configured to swing up and down between an operating position and a standby position about a swing axis 11e. Figure 2 In the standby position shown, it does not contact the yarn path of the short fiber yarn Y (i.e., the traveling short fiber yarn Y). On the other hand, the yarn tail removal rod 11d can be removed from the front end... Figure 2 When the state rises and is in the action position omitted in the figure, the short fiber yarn Y is pushed up so that it retracts (removes) from the yarn guide hook component 11c.

[0077] The yarn tail removal lever 11d is held in a standby position by a spring component (omitted in the figure), for example, so that it is always held in the standby position during the winding of the short fiber yarn Y. Alternatively, the spring component can be omitted, and the yarn tail removal lever 11d can be configured to remain in the standby position by its own weight. The yarn tail removal lever 11d can be moved to the operating position by an upward push arm (omitted in the figure) provided on the connector carriage 6, for example. The upward push arm can be driven, for example, by an actuator such as a cylinder.

[0078] The yarn tail removal lever 11d is moved to the operating position, thereby enabling the short fiber yarn Y to be removed from the yarn guide hook component 11c. As a result, the short fiber yarn Y can be unwound from the yarn storage roller 11a. The unwound short fiber yarn Y is drawn in, for example, by the suction tube 63 described later.

[0079] Furthermore, if the yarn tail removal rod 11d is raised without winding the short fiber yarn Y onto the yarn storage roller 11a, the yarn guide hook component 11c can be prevented from hooking onto the short fiber yarn Y, thus preventing the short fiber yarn Y from being wound onto the yarn storage roller 11a.

[0080] A yarn monitoring device 12 is disposed between the air-jet spinning device 3 and the yarn storage device 11. The short fiber yarn Y generated by the air-jet spinning device 3 passes through the yarn monitoring device 12 before being wound into the yarn storage device 11.

[0081] The yarn monitoring device 12 monitors the quality (thickness, etc.) of the traveling short-fiber yarn Y using a light-transmitting sensor, and detects yarn defects contained in the short-fiber yarn Y (locations with abnormalities in the thickness, etc., and / or foreign objects, etc.). The yarn monitoring device 12 is not limited to a light-transmitting sensor; for example, an electrostatic capacitive sensor can also be used to monitor the short-fiber yarn Y. The yarn monitoring device 12 can also be configured to detect the tension of the short-fiber yarn Y.

[0082] If a yarn defect is detected by the yarn monitoring device 12, the short fiber yarn Y is cut (yarn clearer cut). There are various methods for cutting the short fiber yarn Y; for example, it can be cut by stopping spinning in the airflow spinning device 3. Alternatively, the spinning unit 1 can be configured to have a cutter, which is used to cut the short fiber yarn Y.

[0083] The unit control unit 50 is the same as the control device 90, and is configured as a known computer. The unit control unit 50 includes a CPU, ROM, RAM, and HDD (not shown).

[0084] Each spinning unit 50 is provided in each spinning unit 1 and is configured to communicate with the control device 90. The unit control unit 50 controls the operation of each part of the spinning unit 1 based on the control information such as the timing of operation received from the control device 90.

[0085] Connecting trolley 6 Figure 1 As shown, it includes a movable wheel 61, a connector device 62, a suction tube 63, and a suction port 64.

[0086] The traveling wheel 61 is configured to be driven to rotate by a motor (not shown in the figure). Driving the traveling wheel 61 enables the splicing carriage 6 to travel relative to the plurality of spinning units 1.

[0087] The suction tube (first yarn suction and capture device) 63 is connected to the aforementioned negative pressure source. The suction tube 63 is able to draw in and capture the short fiber yarn Y delivered from the air-jet spinning device 3 by the suction airflow generated inside it.

[0088] A switching valve (not shown) is provided between the suction tube 63 and the negative pressure source. This allows for switching the generation and cessation of the suction airflow in the suction tube 63. The opening and closing of the switching valve is controlled, for example, by the trolley control unit of the connector trolley 6.

[0089] An auxiliary suction device (not shown) is provided at the front end of the suction tube 63. This auxiliary suction device, for example, generates a strong suction airflow by injecting compressed air. Thus, the suction tube 63 can reliably capture short fiber yarn Y. The auxiliary suction device may also be omitted.

[0090] The suction port (second yarn attraction and capture device) 64 is connected to the aforementioned negative pressure source. The suction port 64 can draw in and capture short fiber yarn Y from the package 45 supported on the yarn winding device 4 by generating an airflow at its front end.

[0091] The suction tube 63 and the suction port 64 rotate while capturing the short fiber yarn Y, thereby guiding the short fiber yarn Y to a position where it can be introduced into the splicing device 62.

[0092] The joining carriage 6 is equipped with a yarn detection sensor that detects short fiber yarn Y attracted and captured by the suction tube 63. The yarn detection sensor is, for example, a light sensor. The yarn detection sensor is configured to detect light being blocked by the short fiber yarn Y attracted and captured by the suction tube 63. The joining carriage 6 is also equipped with a yarn detection sensor that detects short fiber yarn Y attracted and captured by the suction port 64.

[0093] The detection result detected by the yarn detection sensor is sent to the control device 90 via the trolley control unit. Based on the detection result from the yarn detection sensor, the control device 90 determines whether the capture of the short fiber yarn Y based on the suction tube 63 and suction port 64 was successful. Alternatively, this determination can be performed by the unit control unit 50 or the trolley control unit. The yarn detection sensor may also be omitted.

[0094] The splicing device 62 performs a splicing operation between the short fiber yarn Y from the air-jet spinning device 3, guided by the suction tube 63, and the short fiber yarn Y from the package 45, guided by the suction port 64. In this embodiment, the splicing device 62 is a twisting device that uses a rotating airflow to twist the yarn ends together. The splicing device 62 is not limited to the above-described twisting device; for example, a knotter that mechanically splices the short fiber yarn Y can also be used.

[0095] Waste yarn generated at the yarn end for splicing at the splicing device 62 is removed by suction pipe 63 and suction port 64. This waste yarn includes short fiber yarn produced by the yarn exiting spinning of the air-jet spinning device 3.

[0096] The doffing trolley 7 performs the doffing operation on the fully loaded roll 45 and the installation operation on the empty spool 15. For example... Figure 1 or Figure 2 As shown, the doffing trolley 7 includes an empty spool receiving section 71, a cradle operating arm 72, a yarn lead-out arm (first yarn attraction and capture device) 73, and an empty spool supply arm 74.

[0097] The empty spool receiving section 71 holds multiple empty spools 15. The doffing trolley 7 may also be configured to not have the empty spool receiving section 71, but to receive empty spools 15 transported by a conveyor belt or the like at any time.

[0098] The cradle operating arm 72 is configured to extend and retract via a cylinder (omitted in the figure).

[0099] A capturing part is provided at the front end of the yarn lead-out arm 73. The capturing part can generate an airflow to attract and capture short fiber yarn Y. A cutting tool (not shown in the figure) is provided at the front end of the yarn lead-out arm 73 to cut the short fiber yarn Y attracted and captured by the capturing part.

[0100] The doffing operation is briefly described below. If the package 45 wound in a certain spinning unit 1 becomes a full package (a state in which a specified amount of short fiber yarn Y is wound), the doffing trolley 7 travels along the doffing trolley moving guide 14 to that spinning unit 1. The doffing trolley 7 uses the cradle operating arm 72 to operate the cradle arm 41 of the yarn winding device 4, thereby removing the full package 45 from the cradle arm 41.

[0101] A roll conveyor 16 is installed between the spinning unit 1 and the doffing trolley guide rail 14. The doffing trolley 7 uses a roll transport mechanism (omitted in the figure) to transport the fully unloaded roll 45 onto the roll conveyor 16. Figure 2 In the present invention, when viewed from the side of the spinning unit 1, the package conveyor 16 is positioned between the doffing trolley guide rail 14 and the spinning unit 1. However, the worsted spinning machine 100 is not limited to this arrangement; for example, the package conveyor 16 may also be positioned on the opposite side of the spinning unit 1, separated from it by the doffing trolley guide rail 14. In other words, the doffing trolley guide rail 14 may also be positioned between the package conveyor 16 and the spinning unit 1.

[0102] The roll conveyor 16 can transport the fully rolled roll 45 to the recycling site along the direction in which the spinning units 1 are arranged.

[0103] Next, the bobbin installation operation of the doffing carriage 7 will be briefly described. The doffing carriage 7 holds the empty bobbin 15 stored in the empty bobbin receiving section 71 via the empty bobbin supply arm 74. The doffing carriage 7 rotates the empty bobbin supply arm 74 to move the bobbin 15 near the cradle arm 41 of the yarn winding device 4. At the same time or simultaneously with the operation of the empty bobbin supply arm 74, the yarn lead-out arm 73 of the doffing carriage 7 attracts and captures the short fiber yarn Y spun by the yarn exit spinning through the air-jet spinning device 3, and guides the captured short fiber yarn Y to the vicinity of the empty bobbin 15. Furthermore, the doffing carriage 7 guides the empty bobbin 15 and the short fiber yarn Y to the yarn winding device 4. Next, using known methods such as yarn wrapping, the short fiber yarn Y (based on ordinary yarn spun by ordinary spinning) drawn from the air-jet spinning device 3 is fixed to the bobbin 15. The short fiber yarn is cut from the regular yarn by a cutter at the front end of the yarn lead-out arm 73 and removed by the yarn lead-out arm 73. After the spool installation is completed, the spool 15 begins to rotate, thereby starting the winding of the short fiber yarn Y onto the new spool 15.

[0104] Next, in the spinning unit 1 of the spinning machine 100 of this embodiment, the timing of operation of each part during the yarn exit spinning of the air-jet spinning device 3 will be explained in detail. Hereinafter, the explanation will take the yarn exit spinning at the splicing stage as an example.

[0105] Consider a scenario in a spinning unit 1 where spinning of a short fiber yarn Y is stopped midway through winding by the air-jet spinning device 3, and the short fiber yarn Y is cut. Among the phenomena that could cause spinning to stop are the detection of yarn defects based on the yarn monitoring device 12, but are not limited to this example. When spinning stops, the splicing trolley 6 travels to the spinning unit 1 to perform a splicing operation.

[0106] Before starting the splicing operation based on the splicing trolley 6, preparation actions for splicing are performed in the spinning unit 1 (e.g., cleaning actions of the air-jet spinning device 3 and residual yarn removal actions of the yarn storage roller 11a, etc.).

[0107] After the preparatory actions in spinning unit 1 are completed, the splicing carriage 6 generates a suction airflow within the suction tube 63 and moves the suction tube 63 to the upper yarn suction position (yarn capture position). The upper yarn suction position is the position where the suction tube 63 can attract the upper yarn of the short fiber yarn Y generated as a fiber bundle F spun by the air-jet spinning device 3. Simultaneously or at the same time, the splicing carriage 6 moves the suction port 64 to the lower yarn suction position. The lower yarn suction position is the position where the suction port 64 can attract the lower yarn of the short fiber yarn Y unwound from the package 45. Figure 2 The dotted lines in the middle indicate the positions where the upper and lower yarns are attracted.

[0108] Simultaneously or after the operation of the suction tube 63 and the suction port 64, the unit control unit 50 starts the rotation of the drafting roller in the drafting device 2 and actuates the second nozzle 36 to inject air into the yarn passage 35 of the air-jet spinning device 3. In this embodiment, the rotation of the drafting roller and the operation of the second nozzle 36 are performed simultaneously. In this way, the air-jet spinning device 3 actuates the second nozzle 36 earlier than the first nozzle 33 during yarn exit spinning, thereby pre-forming an airflow in the yarn passage 35 to transport the fiber bundle F or short fiber yarn Y downstream. As a result, the fiber bundle F or short fiber yarn Y supplied from the drafting device 2 can easily pass through the yarn passage 35.

[0109] like Figure 4As shown, after a predetermined period (set period) T1 has elapsed since the start of the rotation of the rear roller 21 (and the injection action of the second nozzle 36), the unit control unit 50 activates the first nozzle 33 to inject air into the spinning chamber 32 of the airflow spinning device 3. In the rotating airflow based on the injection from the second nozzle 36, the fiber bundle F is hardly twisted, but the rotating airflow from the first nozzle 33 acts to substantially twist the fiber bundle F, generating a short fiber yarn with a certain degree of yarn strength. Therefore, the start time of the injection action of the first nozzle 33 can be the start time of yarn spinning.

[0110] In the spinning machine 100 of this embodiment, the aforementioned predetermined period T1 is determined based on the yarn speed and drafting conditions input by the operator via the input device 92. Specifically, based on the yarn speed, draft ratio, feed ratio during normal spinning, and the start-up rate during yarn exit spinning, the travel speed of the fiber bundle F in the drafting device 2 (between each drafting roller) during yarn exit spinning can be calculated. Based on this calculation result and the aforementioned spacing width, the time from the start of rotation of each drafting roller in the drafting device 2 for yarn exit spinning to the arrival of the fiber bundle F in the air-jet spinning device 3 can be calculated.

[0111] In this embodiment, the rotation and stopping of all four drafting rollers occur simultaneously, but the rotation and stopping timing of the rear roller 21 is used as the reference for control timing. Figure 4 In the middle, four stretching rollers are represented, while the starting point of the rotation of the back roller 21 is shown.

[0112] Furthermore, in the case where multiple spinning units 1 drive the front roller 24 and the middle roller 23 simultaneously, even if spinning is interrupted in one of the spinning units 1, the rotation of the front roller 24 and the middle roller 23 continues.

[0113] In this embodiment, the control device 90 calculates the time required for the fiber bundle F (short fiber yarn Y) to pass through the yarn passage 35 of the air-jet spinning device 3 and be discharged from the yarn outlet on the downstream side after the rotation of the roller 21 begins, based on a predetermined period T1. This ensures that the fiber bundle F has already passed through the yarn passage 35 of the air-jet spinning device 3 at the moment the jetting action based on the first nozzle 33 begins, allowing for a smooth start to yarn spinning.

[0114] The time from the start of the rotation of the back roller 21 to the point where the fiber bundle F passes through the yarn passage 35 varies depending on the yarn speed and drafting conditions. In this embodiment, a predetermined period T1 is calculated as described above, so that regardless of the yarn speed and drafting conditions, the first nozzle 33 can be started immediately upon reaching the point where yarn spinning can begin. As a result, the splicing cycle (cycle) from the occurrence of yarn breakage and / or yarn clearer cut to the completion of splicing can be shortened.

[0115] After a predetermined period T2 has elapsed since the start of the jetting operation based on the first nozzle 33, the jetting operation based on the second nozzle 36 is stopped. This predetermined period T2 may be appropriately set, for example, based on the travel condition and yarn speed of the short fiber yarn Y generated by the air-jet spinning device 3, or it may be set as a fixed value that takes into account a certain degree of redundancy.

[0116] At the moment when the rotation of the roller 21 begins, the straw 63 is positioned for use. Figure 2 The dotted line indicates the yarn suction position. The aforementioned auxiliary suction device, located on the suction tube 63, continuously generates a suction airflow after the rotation of the roller 21 begins. Therefore, the short fiber yarn Y generated by the air-jet spinning device 3 can be easily guided to the front end of the suction tube 63 and captured by it.

[0117] After a predetermined period T3 elapses following the cessation of the jetting action based on the second nozzle 36, the aforementioned switching valve is opened, initiating the suction action of the suction tube 63. This predetermined period T3 is appropriately set, for example, based on prior experiments.

[0118] After a predetermined period T4 elapses following the initiation of the suction action based on suction tube 63, the trolley control unit of the connector trolley 6 begins to move (lower) the front end of suction tube 63. This moves suction tube 63 from the yarn-feeding position to the position where it is used for... Figure 2 The solid line indicates the yarn guide position (target position). The motor, omitted in the figure, used to move the suction tube 63, can also be directly controlled by the control device 90 instead of the trolley control unit. The specified period T4 is appropriately preset in the same way as the specified period T3.

[0119] Simultaneously with the start of the movement of the suction tube 63 toward the splicing device 62, the yarn tail removal lever 11d moves from the standby position to the operating position. That is, the yarn removal operation based on the yarn tail removal lever 11d begins. As a result, the yarn (outgoing short fiber yarn) guided by the suction tube 63 is not stored in the yarn storage roller 11a but is guided to the splicing device 62. Furthermore, the start of the yarn removal operation based on the yarn tail removal lever 11d may be earlier than the start of the movement of the suction tube 63 toward the splicing device 62, or it may be after a predetermined time has elapsed from the start of the movement.

[0120] In this embodiment, when the air-jet spinning device 3 starts or restarts the generation of short fiber yarn Y, the length of the predetermined period T1 is changed to various lengths according to the set yarn speed and drafting conditions. As a result, the timing of the termination of the splicing cycle varies.

[0121] Assuming the length of the specified period T1 is fixed, it is necessary to make this specified period T1 relatively long, for example, to ensure that self-spun yarn and short fiber yarn Y can be guided without problems even at slow yarn speeds. On the other hand, in this embodiment, the specified period T1 can be shortened according to the set yarn speed and drafting conditions, and the actions of each part can be coordinated at a tight time. As a result, yarn feeding and spinning and the switching from yarn feeding to normal spinning can be performed smoothly without errors, and the time of a series of actions can be effectively shortened according to the situation. Therefore, the operating efficiency of the spinning machine 100 can be improved, and the amount of waste yarn can be reduced.

[0122] Even during the yarn feeding and spinning process when the bobbins of the doffing trolley 7 are being installed, the timing of each component's operation can be determined in the same manner as described above. In this case, the yarn guide arm 73 of the doffing trolley 7 is equivalent to the suction tube 63 of the aforementioned splicing trolley 6. Through this control, the yarn feeding and spinning time can be shortened, thereby improving operating efficiency and reducing the amount of waste yarn.

[0123] As described above, the spinning machine 100 of this embodiment generates new short fiber yarn Y by applying a rotating airflow to the fiber bundle F, and then conveys the generated short fiber yarn Y to the downstream yarn exit spinning stage. The spinning machine 100 includes a drafting device 2, an air-jet spinning device 3, a suction tube 63, and a control device 90. The drafting device 2 drafts the yarn S to generate the fiber bundle F. The air-jet spinning device 3 performs yarn exit spinning. The suction tube 63 attracts and captures the short fiber yarn Y generated by the air-jet spinning device 3. The control device 90 can change the cycle time of the cycle including the operation of the suction tube 63 based on at least one of the yarn speed (the travel speed of the short fiber yarn Y generated by the air-jet spinning device 3) and the drafting conditions in the drafting device 2.

[0124] Therefore, depending on the yarn speed and / or drafting conditions, the above cycle can be implemented appropriately, which can improve the operating efficiency of the suction tube 63 and reduce the amount of waste yarn.

[0125] In the above embodiment, the cycle is described as a splicing cycle from the occurrence of a yarn break and / or the cutting by the yarn clearer until the splicing is completed. However, the cycle can also be a cycle from the start of splicing operations by the device associated with the splice, including the suction tube 63, until the splicing itself is completed.

[0126] In the spinning machine 100 of this embodiment, the control device 90 preferably determines the timing of the suction tube 63's operation (specifically, equivalent to...) based on at least one of the yarn speed, which is the travel speed of the short fiber yarn Y generated by the air-jet spinning device 3, and the drafting conditions in the aforementioned drafting device. Figure 4 The timing of the termination period of the specified period T4 in the code), and the change of the cycle time.

[0127] Therefore, once the suction tube 63 is in an operational state (such as when the short fiber yarn Y has moved to a predetermined position), the suction tube 63 can be activated immediately. As a result, operations related to yarn output and spinning can be performed smoothly and without errors, and unnecessary waiting time can be eliminated, thus improving operating efficiency. Furthermore, shortening the yarn output and spinning time reduces the amount of waste yarn. In this embodiment, yarn speed refers to the travel speed of the short fiber yarn Y exiting the air-jet spinning device 3.

[0128] In the spinning machine 100 of this embodiment, the control device 90 determines the start timing (equivalent to) of the suction action based on the suction tube 63, based on the yarn speed and drafting conditions. Figure 4 (The timing of the termination period of the stipulated period T3).

[0129] This allows the suction action based on the suction tube 63 to begin earlier. Therefore, it enables improved operating efficiency and reduced waste yarn.

[0130] In the spinning machine 100 of this embodiment, the control device 90 determines the starting timing for the suction tube 63 to move from the yarn feeding position that captures the short fiber yarn Y toward the yarn guiding position that serves as the destination for guiding the captured short fiber yarn Y, based on the yarn speed and draft conditions. Specifically, Figure 4 The timing of the termination of the specified period T4 is equivalent to the timing of the start of the movement of the suction tube 63 from the yarn feeding position toward the yarn guiding position.

[0131] Therefore, once the state becomes highly likely to be captured by the suction tube 63, the guidance of the short fiber yarn Y based on the suction tube 63 can begin immediately. This results in improved operating efficiency and reduced waste yarn.

[0132] In the spinning machine 100 of this embodiment, the control device 90 controls the suction action of the suction tube 63 and the movement of the short fiber yarn Y captured by the suction action toward the yarn guide position, which is the destination of the yarn, based on the determined timing of the action.

[0133] Therefore, it is possible to appropriately control the suction action based on the suction tube 63 and the start timing of the movement toward the yarn guide position, so as to improve operating efficiency and reduce waste yarn.

[0134] In the spinning machine 100 of this embodiment, the drafting device 2 includes a rear roller 21. The rear roller 21 is provided on the upstream side in the drafting direction in the drafting device 2 for transporting the yarn S. After the control device 90 starts rotating the rear roller 21, after a predetermined period T1 based on at least one of the yarn speed and drafting conditions, the yarn output spinning based on the air-jet spinning device 3 is started.

[0135] Therefore, after the drafting based on the drafting device 2 is substantially started and the fiber bundle F is guided into the interior of the air-jet spinning device 3, yarn spinning can begin immediately. This results in improved operating efficiency and reduced waste yarn.

[0136] In the spinning machine 100 of this embodiment, the air-jet spinning device 3 includes a first nozzle 33. The air-jet spinning device 3 injects air from the first nozzle 33 into the spinning chamber 32 formed in the air-jet spinning device 3. A predetermined period T1 from the start of the rotation of the rear roller 21 to the start of the air injection action based on the first nozzle 33 is determined based on at least one of the yarn speed and draft conditions.

[0137] Therefore, once the probability of the fiber bundle F reaching the air-jet spinning device 3 is high, the air jetting action based on the first nozzle 33 can be started immediately, thus enabling the smooth generation of short fiber yarn Y and improving operating efficiency.

[0138] In the spinning machine 1 of this embodiment, the drafting conditions include at least one of the total draft ratio, main draft ratio, back zone draft ratio, feed ratio, and spacing width.

[0139] Thus, the spinning machine 1 can change the cycle time based on appropriate conditions.

[0140] The spinning machine 1 of this embodiment includes an input device 92 (setting unit) for setting yarn speed and / or drafting conditions.

[0141] This allows operators to set the desired yarn speed and / or drafting conditions.

[0142] The spinning machine 100 of this embodiment includes a yarn winding device 4, a suction port 64, and a splicing device 62. The yarn winding device 4 winds short fiber yarn Y generated by the air-jet spinning device 3 to form a package 45. The suction port 64 draws in and captures the short fiber yarn Y from the yarn winding device 4. The splicing device 62 performs a splicing operation to join the short fiber yarn Y drawn in and captured by the suction tube 63 and the suction port 64. The splicing operation based on the splicing device 62 is performed after the yarn exit spinning based on the air-jet spinning device 3 is completed.

[0143] Therefore, the splicing cycle can be performed smoothly and without errors according to the yarn speed and drafting conditions, and the cycle time can be shortened.

[0144] The spinning machine 100 of this embodiment includes multiple spinning units 1 and a splicing carriage 6. The splicing carriage 6 travels relative to the multiple spinning units 1. Each spinning unit 1 is provided with a drafting device 2 and an air-jet spinning device 3. The splicing carriage 6 is provided with a suction tube 63, a suction port 64, and a splicing device 62.

[0145] That is, the above-described configuration, which can shorten the cycle time at splicing, is particularly advantageous when multiple spinning units 1 share the splicing carriage 6. After the operation of one spinning unit 1 is completed, the splicing carriage 6 can start the operation of another spinning unit 1 at a time earlier than before.

[0146] The spinning machine 100 of this embodiment includes multiple spinning units 1 and a doffing carriage 7. The doffing carriage 7 travels relative to the multiple spinning units 1. Each spinning unit 1 is provided with a drafting device 2 and an air-jet spinning device 3. Each spinning unit 1 winds short fiber yarn Y generated by the air-jet spinning device 3 to form a package 45. The doffing carriage 7 doffs the package 45, which has become a full package. A yarn guide arm 73 is provided on the doffing carriage 7.

[0147] This shortens the doffing cycle time. This is particularly advantageous in structures where multiple spinning units 1 share the doffing carriage 7. Once the doffing carriage 7 has finished operating in one spinning unit 1, it can begin operating in another spinning unit 1 earlier than before.

[0148] The preferred embodiments of the present invention have been described above, but the structure described above can be modified as follows. The above configuration and the following variations can be appropriately combined.

[0149] It can also be configured to replace the start-up rate by setting the yarn speed during yarn feeding and spinning via the input device 92.

[0150] The timing of the actions of the aforementioned components is not limited to being determined by the control device 90. For example, the control device 90 may send information about the set drafting conditions and yarn speed to the unit control unit 50, and the unit control unit 50 may determine the timing of the actions of the components, including the aforementioned specified period T1. Alternatively, the timing of the actions may be determined by the carriage control unit of the splicing carriage 6 or the carriage control unit of the doffing carriage 7.

[0151] The timing of the operation of each of the above parts can be determined based on either yarn speed or drafting conditions (e.g., the length of the specified period T1). That is, the timing of the operation of each of the above parts can be determined based solely on yarn speed or solely on drafting conditions.

[0152] It can also be changed to substantially represent the drafting conditions input by the operator to the spinning unit 1 via the input device 92 by the thickness of the fiber bundle passing through the drafting roller.

[0153] Alternatively, each device can be configured to wind short fiber yarn Y supplied from the lower side on the upper side in the height direction within each spinning unit 1.

[0154] It can also replace the splicing trolley 6, and a splicing device 62, a suction tube 63, and a suction port 64 can be set in each spinning unit 1.

[0155] The number of stretching rollers in the stretching device 2 is not limited to 4, but can be changed to 2, 3, or more than 5.

[0156] Alternatively, the spinning unit 1 can draw the short fiber yarn Y from the air-jet spinning device 3 without using the yarn storage roller 11a, but instead using the known clamping roller and output roller. In this case, the feed ratio is the ratio of the circumferential speed of the front roller 24 to the circumferential speed of the output roller. That is, feed ratio = (circumferential speed of the front roller 24) / (circumferential speed of the output roller).

[0157] In the case where the spinning unit 1 has clamping rollers and output rollers, a yarn storage roller 11a may also be provided downstream of these rollers. Alternatively, a relaxation tube and / or a mechanical compensator that draws in airflow may be provided instead of the yarn storage device 11.

[0158] exist Figure 3 In the illustration, the fiber guide 31 is shown supporting a needle-like component, but the needle-like component may not be provided. The shapes of the components of the air-jet spinning device 3 are not limited to the shapes shown in the illustration.

Claims

1. An air flow spinning machine that performs self-spinning of newly generating yarn by applying a rotating air flow to a fiber bundle and transporting the generated yarn to a downstream side, characterized by, Possessing: Drafting device that drafts raw material to generate the fiber bundle; Air spinning device that performs the self-spinning; First yarn suction capturing device that suction captures the yarn generated by the air spinning device; And Control section that changes the cycle time of the cycle including the action of the first yarn suction capturing device based on at least either one of the yarn speed that is the traveling speed of the yarn generated by the air spinning device and the drafting condition in the drafting device, The drafting device possesses a first roller that is provided on the upstream side in the drafting direction of the raw material and that is used to carry the raw material, The control section causes the self-spinning based on the air spinning device to start after a period based on at least either one of the yarn speed and the drafting condition has elapsed from the start of the rotation of the first roller.

2. The air spinning machine according to claim 1, wherein The control section calculates the action timing of the first yarn suction capturing device based on at least either one of the yarn speed that is the traveling speed of the yarn generated by the air spinning device and the drafting condition in the drafting device, and changes the cycle time.

3. The air spinning machine according to claim 1, wherein The control section calculates the start timing of the suction action based on the first yarn suction capturing device based on at least either one of the yarn speed and the drafting condition, and changes the cycle time.

4. The air spinning machine according to claim 2, wherein The control section calculates the start timing of the suction action based on the first yarn suction capturing device based on at least either one of the yarn speed and the drafting condition, and changes the cycle time.

5. The air spinning machine according to claim 1, wherein The control section calculates the start timing of the movement of the first yarn suction capturing device from a yarn capturing position that captures the yarn toward a target position that is the destination of the yarn that has been captured, based on at least either one of the yarn speed and the drafting condition, and changes the cycle time.

6. The air spinning machine according to claim 2, wherein The control section calculates the start timing of the movement of the first yarn suction capturing device from a yarn capturing position that captures the yarn toward a target position that is the destination of the yarn that has been captured, based on at least either one of the yarn speed and the drafting condition, and changes the cycle time.

7. The air spinning machine according to claim 3, wherein The control section calculates the start timing of the movement of the first yarn suction capturing device from a yarn capturing position that captures the yarn toward a target position that is the destination of the yarn that has been captured, based on at least either one of the yarn speed and the drafting condition, and changes the cycle time.

8. The air spinning machine according to claim 4, wherein The control section calculates the start timing of the movement of the first yarn suction capturing device from a yarn capturing position that captures the yarn toward a target position that is the destination of the yarn that has been captured, based on at least either one of the yarn speed and the drafting condition, and changes the cycle time.

9. The open-end spinning machine according to claim 1, wherein the control section controls an attracting operation of the first yarn attracting and capturing device and movement of the yarn captured by the attracting operation toward a target position as a destination of the guiding.

10. The open-end spinning machine according to claim 2, wherein the control section controls an attracting operation of the first yarn attracting and capturing device and movement of the yarn captured by the attracting operation toward a target position as a destination of the guiding.

11. The open-end spinning machine according to claim 3, wherein the control section controls an attracting operation of the first yarn attracting and capturing device and movement of the yarn captured by the attracting operation toward a target position as a destination of the guiding.

12. The open-end spinning machine according to claim 4, wherein the control section controls an attracting operation of the first yarn attracting and capturing device and movement of the yarn captured by the attracting operation toward a target position as a destination of the guiding.

13. The open-end spinning machine according to claim 5, wherein the control section controls an attracting operation of the first yarn attracting and capturing device and movement of the yarn captured by the attracting operation toward a target position as a destination of the guiding.

14. The open-end spinning machine according to claim 6, wherein the control section controls an attracting operation of the first yarn attracting and capturing device and movement of the yarn captured by the attracting operation toward a target position as a destination of the guiding.

15. The open-end spinning machine according to claim 7, wherein the control section controls an attracting operation of the first yarn attracting and capturing device and movement of the yarn captured by the attracting operation toward a target position as a destination of the guiding.

16. The open-end spinning machine according to claim 8, wherein the control section controls an attracting operation of the first yarn attracting and capturing device and movement of the yarn captured by the attracting operation toward a target position as a destination of the guiding.

17. The open-end spinning machine according to any one of claims 1 to 16, wherein the open-end spinning device has a spinning nozzle through which air jetted into a spinning chamber formed inside passes, the period from the start of the rotation of the first roller to the start of the air jetting operation of the spinning nozzle is calculated based on at least any one of the yarn speed and the draft condition.

18. The open-end spinning machine according to any one of claims 1 to 16, wherein the draft condition includes at least any one of a total draft ratio, a main draft ratio, a back zone draft ratio, a feed ratio, and a gauge width.

19. The open-end spinning machine according to claim 17, wherein the draft condition includes at least any one of a total draft ratio, a main draft ratio, a back zone draft ratio, a feed ratio, and a gauge width.

20. The open-end spinning machine according to any one of claims 1 to 16, 19, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The yarn speed and / or the draft condition are set by a setting unit.

21. The open-end spinning machine according to claim 17, wherein The yarn speed and / or the draft condition are set by a setting unit.

22. The open-end spinning machine according to claim 18, wherein The yarn speed and / or the draft condition are set by a setting unit.

23. The open-end spinning machine according to any one of claims 1 to 16, 19, 21, 22, characterized in that 22. The open-end spinning machine according to claim 18, wherein A yarn winding device that winds the yarn generated by the open-end spinning device to form a package; A second yarn suction and catching device that suctions and catches the yarn from the yarn winding device; and A joining device that performs a joining operation of joining the yarn suctioned and caught by the first and second yarn suction and catching devices, The joining operation by the joining device is performed after the self-spinning based on the open-end spinning device is completed.

24. The air flow spinning machine of claim 17, wherein, A yarn winding device that winds the yarn generated by the open-end spinning device to form a package; A second yarn suction and catching device that suctions and catches the yarn from the yarn winding device; and A joining device that performs a joining operation of joining the yarn suctioned and caught by the first and second yarn suction and catching devices, The joining operation by the joining device is performed after the self-spinning based on the open-end spinning device is completed. A yarn winding device that winds the yarn generated by the open-end spinning device to form a package; 25. The air spinning machine of claim 18, wherein, A second yarn suction and catching device that suctions and catches the yarn from the yarn winding device; and A joining device that performs a joining operation of joining the yarn suctioned and caught by the first and second yarn suction and catching devices, The joining operation by the joining device is performed after the self-spinning based on the open-end spinning device is completed. A yarn winding device that winds the yarn generated by the open-end spinning device to form a package; A second yarn suction and catching device that suctions and catches the yarn from the yarn winding device; 26. The air spinning machine of claim 20, wherein, and A joining device that performs a joining operation of joining the yarn suctioned and caught by the first and second yarn suction and catching devices, The joining operation by the joining device is performed after the self-spinning based on the open-end spinning device is completed. A yarn winding device that winds the yarn generated by the open-end spinning device to form a package; A second yarn suction and catching device that suctions and catches the yarn from the yarn winding device; and 27. The air spinning machine of claim 23, wherein, A joining device that performs a joining operation of joining the yarn suctioned and caught by the first and second yarn suction and catching devices, The joining operation by the joining device is performed after the self-spinning based on the open-end spinning device is completed. A plurality of spinning units; and A joining trolley that travels with respect to the plurality of spinning units, The draft device and the open-end spinning device are provided in each of the spinning units, 28. The open-end spinning machine according to any one of claims 24 to 26, characterized in that The first and second yarn suction and catching devices and the joining device are provided in the joining trolley. A plurality of spinning units; and A joining trolley that travels with respect to the plurality of spinning units, The draft device and the open-end spinning device are provided in each of the spinning units, The first and second yarn suction and catching devices and the joining device are provided in the joining trolley.

29. The open-end spinning machine according to any one of claims 1 to 16, 19, 21, 22, 24 to 27, characterized in that A plurality of spinning units; and A doffing trolley that travels with respect to the plurality of spinning units, Each of the spinning units has the draft device and the open-end spinning device that winds the yarn generated by the open-end spinning device to form a package, ​ The doffing carriage doffs the packages that have become full, The first yarn suction capturing device is provided to the doffing carriage.

30. The open-end spinning machine according to claim 17, characterized in that Possessing: A plurality of spinning units; and A doffing carriage that travels with respect to the plurality of spinning units, Each of the spinning units possesses the draft device and the air spinning device, and a package is formed by winding yarn generated by the air spinning device, The doffing carriage doffs the packages that have become full, The first yarn suction capturing device is provided to the doffing carriage.

31. The air spinning machine of claim 18, wherein, Possessing: A plurality of spinning units; and A doffing carriage that travels with respect to the plurality of spinning units, Each of the spinning units possesses the draft device and the air spinning device, and a package is formed by winding yarn generated by the air spinning device, The doffing carriage doffs the packages that have become full, The first yarn suction capturing device is provided to the doffing carriage.

32. The open-end spinning machine according to claim 20, characterized in that Possessing: A plurality of spinning units; and A doffing carriage that travels with respect to the plurality of spinning units, Each of the spinning units possesses the draft device and the air spinning device, and a package is formed by winding yarn generated by the air spinning device, The doffing carriage doffs the packages that have become full, The first yarn suction capturing device is provided to the doffing carriage.

33. The air spinning machine of claim 23, wherein, Possessing: A plurality of spinning units; and A doffing carriage that travels with respect to the plurality of spinning units, Each of the spinning units possesses the draft device and the air spinning device, and a package is formed by winding yarn generated by the air spinning device, The doffing carriage doffs the packages that have become full, The first yarn suction capturing device is provided to the doffing carriage.

34. The air spinning machine of claim 28, wherein, Possessing: A plurality of spinning units; and A doffing carriage that travels with respect to the plurality of spinning units, Each of the spinning units possesses the draft device and the air spinning device, and a package is formed by winding yarn generated by the air spinning device, The doffing carriage doffs the packages that have become full, The first yarn suction capturing device is provided to the doffing carriage. Possessing: A plurality of spinning units; and A doffing carriage that travels with respect to the plurality of spinning units, Each of the spinning units possesses the draft device and the air spinning device, and a package is formed by winding yarn generated by the air spinning device, The doffing carriage doffs the packages that have become full, The first yarn suction capturing device is provided to the doffing carriage. Possessing: A plurality of spinning units; and A doffing carriage that travels with respect to the plurality of spinning units, Each of the spinning units possesses the draft device and the air spinning device, and a package is formed by winding yarn generated by the air spinning device, The doffing carriage doffs the packages that have become full, The first yarn suction capturing device is provided to the doffing carriage.

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