spinning machine

Abstract

In the case of breakage of a spinning yarn in a spinning machine, a spinning yarn on a winding side is surely caught by a suction device. The spinning machine is provided with a yarn storage device, a suction device, and a yarn release lever. The yarn storage device is arranged in a yarn path formed between a spinning device and a winding device. The suction device is capable of sucking the spinning yarn at a position on a downstream side of the yarn path from the yarn storage device, and is fixedly provided. The yarn release lever is capable of changing the yarn path. The yarn storage device is provided with a yarn storage roller and a yarn hooking member. After the spinning yarn is broken between the spinning device and the yarn storage device, the spinning yarn remains on the yarn storage roller, and the spinning yarn is released from the yarn hooking member by moving the yarn release lever to a yarn release position while rotating the yarn storage roller. During the rotation of the yarn storage roller and the yarn release lever being located at the yarn release position, the suction device is in a suction state.

Description

Technical Field

[0001] This invention relates to spinning machines. Background Technology

[0002] Previously, a spinning machine was known in which the supplied yarn was temporarily stored in a yarn storage device and then wound in a winding device to form a package. Patent Document 1 discloses a worsting machine as such a spinning machine.

[0003] In the spinning machine of Patent Document 1, a yarn storing roller is provided in the yarn storing device. The yarn can be temporarily stored by winding it around the outer periphery of the yarn storing roller. A suction device is provided downstream of the yarn storing roller. When a yarn breakage occurs downstream of the yarn storing device, the remaining yarn in the yarn storing roller is attracted and removed by the suction device.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2014-125349 Summary of the Invention

[0007] In the structure of Patent Document 1, the suction device is simply a device for removing the yarn remaining in the yarn storage roller when a yarn breakage occurs at a position downstream of the yarn storage device.

[0008] The object of the present invention is to reliably capture the spun yarn on the package side using a suction device when the spun yarn breaks in the spinning machine.

[0009] The problem to be solved by this invention is as described above. The solution to solve the problem and its effects will be described below.

[0010] According to a first aspect of the present invention, a spinning machine with the following structure is provided. That is, the spinning machine includes a spinning device, a winding device, a yarn retention device, a suction device, and a yarn actuating member. The spinning device is capable of generating yarn by spinning a fiber bundle and supplying the yarn. The winding device winds the yarn supplied from the spinning device to form a package. The yarn retention device is disposed in the yarn path formed between the spinning device and the winding device. The suction device is fixedly provided and capable of attracting yarn at a position downstream of the yarn travel from the yarn retention device. The yarn actuating member can change the yarn path by moving between a standby position and a yarn release position. The yarn retention device includes a yarn retention roller and a yarn hooking member. The yarn retention roller is capable of winding the yarn around its outer periphery to retain the yarn. The yarn hooking member is rotatably configured to apply tension to the yarn by hooking the yarn unwound from the yarn retention roller. The yarn actuating member can disengage the yarn from the yarn hook member by moving from the standby position to the yarn disengagement position. After the yarn is disconnected between the spinning device and the yarn holding device, with the yarn remaining on the yarn holding roller and connected to the package, the yarn is disengaged from the yarn hook member by rotating the yarn holding roller while moving the yarn actuating member towards the yarn disengagement position. During the period when the yarn holding roller is rotating and the yarn actuating member is in the yarn disengagement position, the suction device is in a suction state.

[0011] Therefore, after the yarn breaks, the yarn on the package side can be reliably captured using a suction device.

[0012] In the aforementioned spinning machine, the following structure is preferred: When the yarn is disconnected between the spinning device and the yarn holding device, and also between the yarn holding roller and the package, and while some yarn remains on the yarn holding roller, the yarn is disengaged from the yarn hook member by rotating the yarn holding roller and moving the yarn actuating member towards the yarn disengagement position. During the rotation of the yarn holding roller and the yarn actuating member being in the yarn disengagement position, the remaining yarn on the yarn holding roller is removed by attracting the suction device into a suction state.

[0013] If the yarn breaks between the yarn holding roller and the package, it is impossible to draw the yarn out from the yarn holding roller by winding the package. However, with the structure described above, the yarn remaining on the yarn holding roller can be captured by a suction device and properly removed.

[0014] According to a second aspect of the present invention, a spinning machine with the following structure is provided. That is, the spinning machine includes a spinning device, a winding device, a yarn retention device, a suction device, and a yarn actuating member. The spinning device is capable of generating and supplying yarn by spinning a fiber bundle. The winding device winds the yarn supplied from the spinning device to form a package. The yarn retention device is disposed in the yarn path formed between the spinning device and the winding device. The suction device is fixedly provided and capable of attracting yarn at a position downstream of the yarn travel from the yarn retention device. The yarn actuating member changes the yarn path. The yarn retention device includes a yarn retention roller and a yarn hooking member. The yarn retention roller is capable of winding the yarn around its outer periphery to retain the yarn. The yarn hooking member is rotatably configured to apply tension to the yarn by hooking the yarn unwound from the yarn retention roller. The aforementioned yarn action component alters the yarn path of the yarn unwound from the aforementioned yarn retention roller in connection with the yarn interruption action.

[0015] Therefore, after the yarn breaks, the yarn on the package side can be reliably captured using a suction device.

[0016] In the aforementioned spinning machine, the following structure is preferred: the spinning machine comprises multiple spinning units. Each of the aforementioned spinning units comprises the aforementioned spinning device, the aforementioned yarn retention device, and the aforementioned winding device. The aforementioned yarn operating component and the drive unit that drives the aforementioned yarn operating component are both provided in each of the aforementioned spinning units.

[0017] Therefore, the yarn actuating component can operate independently of the yarn actuating components of other spinning units. Thus, the yarn actuating component can be driven at a time independent of the operation of the yarn actuating components of other spinning units.

[0018] In the aforementioned spinning machine, it is preferable that, when the spinning device is spinning yarn, the yarn action member is moved to a position for discarding the yarn wound on the yarn storage roller.

[0019] Therefore, the yarn action component can achieve two functions: easily capturing the yarn on the package side using the suction device, and discarding the yarn on the spinning device side when the yarn is drawn out during spinning. This simplifies the structure.

[0020] In the aforementioned spinning machine, it is preferable that the yarn action component returns to the position where the yarn path change is released after the yarn has been completely unwound from the yarn holding roller and attracted by the attraction device.

[0021] Therefore, the yarn on the package side can be reliably captured using the suction device. However, if the yarn action part returns to the standby position too early, there may be a situation where the yarn is not completely unwound from the yarn holding roller and remains on the yarn holding roller.

[0022] In the aforementioned spinning machine, it is preferable that, after spinning is interrupted and the rotational speed of the yarn holding roller is reduced, the yarn action component moves to change the yarn path.

[0023] Therefore, during the period after spinning is interrupted and before the yarn action component moves, the yarn remaining on the yarn holding roller can be wound onto the package. As a result, the amount of yarn breakage generated in the spinning machine can be reduced. In addition, since the yarn action component moves after the rotational speed of the yarn holding roller has been reduced, the yarn on the package side can be easily captured by the suction device.

[0024] According to a third aspect of the present invention, a spinning machine with the following structure is provided. That is, the spinning machine includes a spinning device, a winding device, a yarn retention roller, a first drive unit, a yarn hooking member, and a suction device. The spinning device is capable of generating and supplying yarn by spinning a fiber bundle. The winding device winds the yarn supplied from the spinning device to form a package. The yarn retention roller is disposed in a yarn path formed between the spinning device and the winding device. The first drive unit rotatably drives the yarn retention roller. The yarn hooking member contacts the yarn unwound from the yarn retention roller and applies tension to the yarn. The suction device is fixedly provided and capable of attracting yarn at a position downstream of the yarn travel from the yarn retention roller. In connection with the interruption of spinning, when yarn remains on the yarn retention roller and the yarn is connected between the yarn retention roller and the package, at least one of the following operations is performed. (1) Stop the rotation of the yarn hook member. (2) Stop the rotation of the yarn holding roller by stopping the drive of the first drive unit, and rotate the yarn hook member in the direction of unwinding the yarn from the yarn holding roller. (3) Deform the yarn hook member into an ineffective shape by shortening its length or bending it.

[0025] Therefore, after the yarn breaks, the yarn on the package side can be reliably captured using a suction device.

[0026] In the above-described spinning machine, the following structure is preferred. That is, during the period when the yarn is disconnected between the spinning device and the yarn holding roller, and when the yarn is disconnected between the yarn holding roller and the package, and during at least one of (1) to (3) above, the yarn remaining in the yarn holding roller is removed by the suction device by making the suction device in a suction state.

[0027] If the yarn breaks between the yarn holding roller and the package, it is impossible to draw the yarn out from the yarn holding roller by winding the package. However, with the structure described above, the yarn remaining on the yarn holding roller can be captured by a suction device and properly removed.

[0028] In the above-described spinning machine, it is preferable to have a second drive unit that rotates and drives the yarn hooking component.

[0029] Therefore, the rotation of the yarn holding roller and the rotation of the yarn hook component can be controlled independently.

[0030] In the aforementioned spinning machine, it is preferable to have a sensor that detects the amount of yarn retained by the yarn retention roller.

[0031] Therefore, in order to capture the yarn on the package side using the suction device, the rotation of the package can be stopped at the appropriate time based on the detection results of the sensor.

[0032] In the aforementioned spinning machine, it is preferable to include a yarn moving device that actively moves the yarn toward the aforementioned suction device.

[0033] Therefore, the yarn on the package side can be reliably captured using the suction device.

[0034] In the aforementioned spinning machine, the following structure is preferred: the spinning machine comprises multiple spinning units. Each spinning unit comprises the aforementioned spinning device and the aforementioned winding device. The winding device of each of the aforementioned spinning units comprises a traversing device for traversing the yarn wound by the winding device. In the aforementioned spinning unit, if the yarn breaks between the aforementioned spinning device and the aforementioned winding device, the yarn on the winding device side is wound into a package while the traversing amplitude of the yarn traversing by the traversing device is narrower than the traversing amplitude before the yarn breaks.

[0035] This prevents the yarn from being wound up to the point where it separates from the width of the package. Therefore, it improves the quality of the package.

[0036] In the aforementioned spinning machine, the following structure is preferred: When the yarn breaks between the spinning device and the yarn holding roller, the yarn remains continuous between the yarn holding roller and the package. The yarn that ends its unwinding from the yarn holding roller and is attracted by the suction device remains continuous between the suction device and the package.

[0037] Therefore, after the yarn breaks, the yarn on the package side can be reliably captured using a suction device. Attached Figure Description

[0038] Figure 1 This is a front view showing the overall structure of a spinning machine according to one embodiment of the present invention.

[0039] Figure 2 This is a side view of the spinning unit in a spinning machine.

[0040] Figure 3 This is a side view showing the state of the spun yarn being disconnected in the spinning unit.

[0041] Figure 4 This is a side view showing the situation during the fixed capture and splicing process, where the yarn release rod moves from the standby position to the yarn release position, and the remaining yarn on the yarn storage roller unwinds from the yarn storage roller, while the slack yarn is attracted by the attraction device.

[0042] Figure 5 This is a side view showing the state in which the yarn end of the spun yarn on the package side falls off the yarn retention roller and is captured by the suction device, and the spun yarn on the package side can be picked up by the yarn splicing device of the splicing trolley.

[0043] Figure 6 This indicates that the spinning device starts from... Figure 5 A side view of the state in which the yarn is drawn out and spun from the spinning device is guided by the suction tube to the splicing device.

[0044] Figure 7 This is a side view showing the situation where, after the yarn is drawn from the yarn reel and transferred to normal spinning, the yarn reel moves towards the yarn reel position, and the yarn remaining in the yarn reel is drawn from the yarn reel during spinning, the spun yarn unwinds from the yarn reel.

[0045] Figure 8 This is a side view showing the yarn release lever moving to the standby position and the yarn splicing process in the yarn splicing device.

[0046] Figure 9 This is an explanation Figures 2 to 5 The flowchart shows the actions.

[0047] Figure 10This is a side view showing the situation where, during the process of moving and capturing yarn splicing, the yarn on the package side is captured by the nozzle and the yarn on the spinning device side is captured by the suction tube, and both are guided to the splicing device for splicing.

[0048] Figure 11 This is a side view showing the structure of the yarn retention device in the third variation.

[0049] Explanation of reference numerals in the attached figures

[0050] 1 Spinning machine

[0051] 2 Spinning Unit

[0052] 4b Fiber bundle

[0053] 5. Spinning yarn (thread)

[0054] 7 rolls

[0055] 22 Spinning apparatus

[0056] 23, 23x Yarn retention device

[0057] 24. Suction device

[0058] 25 Winding device

[0059] 51 Yarn retention roller

[0060] 52 Electric Motor (First Drive Unit)

[0061] 52a Roller Drive Motor (First Drive Unit)

[0062] 52b Yarn hook component drive motor (second drive unit)

[0063] 53 Yarn hook components

[0064] 55. Yarn release bar (yarn action component)

[0065] 56. Yarn retention detection sensor (sensor)

[0066] 65 Yarn moving device

[0067] 73. Transverse Movement Device

[0068] P1 Standby Position (Position 1)

[0069] P2 Yarn detachment position (position 2) Detailed Implementation

[0070] A spinning machine 1 according to one embodiment of the present invention is described with reference to the accompanying drawings. In the following description, "upstream side" and "downstream side" refer to the upstream and downstream sides in the direction of travel (yarn travel direction) of the spinning yarn 5, the yarn sliver 4a, or the fiber bundle 4b when the spinning yarn (yarn) 5 is wound. "Front" and "rear" refer to the near-front and inner sides when the front of the spinning machine 1 is facing the spinning machine 1. Figure 1 (the near front and inner sides). "Fixed" includes cases where it is set in a way that is completely immovable and cases where it is set in a way that allows some movement.

[0071] like Figure 1 As shown, the spinning machine 1 includes a blower housing 111, a control box 112, multiple spinning units 2, and a yarn receiving trolley (work trolley) 80. The multiple spinning units 2 are arranged in a predetermined direction. Each spinning unit 2 (spinning machine 1) spins yarn using a spinning device 22, etc., described later. In this embodiment, the spinning machine 1 is configured as an air spinning machine.

[0072] A blower 113, which functions as a negative pressure source, is installed inside the blower housing 111.

[0073] The control box 112 is equipped with a central control device 115, a display unit 116 and an operation unit 117.

[0074] The central control unit 115 centrally manages and controls all parts of the spinning machine 1. The central control unit 115 connects to each spinning unit 2 via signal lines (not shown in the diagram). Figure 2 The unit control unit 15 is connected in this way. In this embodiment, each spinning unit 2 has a unit control unit 15, but a predetermined number (e.g., two or four) of spinning units 2 may share a single unit control unit 15.

[0075] The display unit 116 can display settings for the spinning units 2 and / or information related to the status of each spinning unit 2. The operation unit 117 is operated by the operator to set the spinning machine 1 and / or to select information displayed on the display unit 116. The display unit 116 and the operation unit 117 may also be configured as a touch panel display.

[0076] like Figure 2 As shown, each spinning unit 2 includes a drafting device 21, a spinning device 22, a yarn storage device 23, a suction device 24, and a winding device 25. These devices are arranged sequentially from the upstream side to the downstream side in the direction of travel of the spun yarn 5, etc. The spinning device 22 constitutes the yarn feeding device in the spinning unit 2.

[0077] The yarn receiving carriage 80 is configured to move relative to each spinning unit 2. One yarn receiving carriage 80 is provided for each of the multiple spinning units 2. Figure 1 The diagram shows one yarn receiving carriage 80, but the spinning machine 1 may also have multiple yarn receiving carriages 80. The yarn receiving carriage 80, as described later, includes a yarn receiving device 82, a suction tube 83, and a suction nozzle 84.

[0078] The drafting device 21 is located at the top of the spinning unit 2 (spinning machine 1). The drafting device 21 has multiple pairs of drafting rollers. Each pair of drafting rollers consists of two drafting rollers.

[0079] Specifically, the drafting device 21 has four pairs of drafting rollers. The four pairs of drafting rollers are arranged sequentially from the upstream side to the downstream side: a rear roller pair 41, a third roller pair 42, an intermediate roller pair 43, and a front roller pair 44. Each drafting roller in the intermediate roller pair 43 is provided with a conveyor belt 45.

[0080] The four drafting roller pairs each have a drive roller and a driven roller that are opposite each other. For each of the four drafting roller pairs, a drive source, such as a motor (not shown), is provided for each drive roller. Each drive roller is driven to rotate about its own axis by the drive source. The driven roller of each drafting roller pair is configured to rotate about its own axis via a bearing (not shown).

[0081] The drafting device 21 stretches (drafts) the yarn 4a supplied from the yarn supply section 20 by clamping the yarn 4a between the drafting rollers of each drafting roller pair (between the driving roller and the driven roller) and transporting the yarn 4a until it reaches a predetermined amount of fiber (or thickness), thus generating a fiber bundle 4b. The fiber bundle 4b generated by the drafting device 21 is supplied to the spinning device 22.

[0082] The yarn supply section 20 is positioned upstream of the drafting device 21. A sliver can is provided in the yarn supply section 20 as a container for holding the yarn 4a.

[0083] In this embodiment, the spinning device 22 is configured as an air spinning device. The spinning device 22 generates spun yarn 5 by twisting the fiber bundle 4b (the drafted yarn 4a) generated by the drafting device 21 by causing a swirling airflow to act on it. The spinning device 22 is positioned downstream of the drafting device 21.

[0084] In spinning unit 2 (spinning machine 1), a yarn feeding device consisting of spinning device 22 supplies the spinning yarn 5. The spinning yarn 5 generated by the yarn feeding device travels from the yarn feeding device toward the winding device 25 and is wound by the winding device 25. Between the yarn feeding device and the winding device 25, a yarn path for the spinning yarn 5 to travel is formed.

[0085] The yarn holding device 23 draws out and temporarily holds the spun yarn 5 generated by the spinning device 22. The yarn holding device 23 is positioned midway along the yarn path formed between the yarn feeding device and the winding device 25. Specifically, the yarn holding device 23 is positioned downstream of the spinning device 22.

[0086] The yarn retention device 23 includes a yarn retention roller 51, an electric motor (first drive unit) 52, a yarn hook component 53, a guide 54, a yarn release rod (yarn action component) 55, and a yarn retention amount detection sensor (sensor) 56.

[0087] The yarn retention roller 51 is driven to rotate by an electric motor 52. The yarn retention roller 51 temporarily retains the spun yarn 5 by winding it around its outer circumference. By rotating to one side at a predetermined speed with the spun yarn 5 wound on its outer circumference, the yarn retention roller 51 can draw the spun yarn 5 out of the spinning device 22 at a predetermined speed.

[0088] The yarn hook component 53 is capable of hooking the spinning yarn 5. The yarn hook component 53 guides the spinning yarn 5 to the outer peripheral surface of the yarn retention roller 51 by rotating integrally with the yarn retention roller 51 while the spinning yarn 5 is hooked.

[0089] The rotation of the yarn holding roller 51 in the direction from which the spinning yarn 5 is drawn from the spinning device 22 is referred to as forward rotation, and rotation in the opposite direction is referred to as reverse rotation. Similarly, the rotation of the yarn hook component 53 in the same direction as the yarn holding roller 51 is referred to as forward rotation, and rotation in the opposite direction is referred to as reverse rotation. Normally, the yarn holding roller 51 and the yarn hook component 53 are driven in the forward rotation direction.

[0090] The yarn release lever 55 is positioned near the yarn holding roller 51. The yarn release lever 55 is capable of performing a yarn release action that disengages the spun yarn 5 from the yarn hook component 53. The yarn release lever 55 is as follows... Figure 1 The component, which is configured in an L-shape as shown, is supported in a manner in which its ends can rotate.

[0091] The yarn release lever 55 is configured to move between a standby position (position 1) P1 and a yarn release position (position 2) P2. Figure 2 The diagram shows the yarn release lever 55 in the standby position P1. As the yarn release lever 55 moves from the standby position P1 to the yarn release position P2, it passes through a space downstream of the yarn holding roller 51. At this time, if there is a spun yarn 5 hooked to the yarn hook member 53, the yarn release lever 55 acts on the spun yarn 5, thereby detaching the spun yarn 5 from the yarn hook member 53. Figure 4 and Figure 7 The diagram shows the state of the yarn release lever 55 in the yarn release position P2.

[0092] In this embodiment, each spinning unit 2 is provided with a yarn release bar 55, and each yarn release bar 55 is provided with a separate drive unit (motor or cylinder, etc.). Therefore, the yarn release bar 55 can operate independently relative to the yarn release bars 55 of other spinning units 2.

[0093] The guide 54 is positioned downstream of the yarn holding roller 51. The guide 54 restricts the track of the spinning yarn 5, which is actuated by the rotating yarn hook member 53, thus stabilizing and guiding the yarn 5 in its path downstream of the guide 54 (on the winding device 25 side). The guide 54 is positioned downstream of the yarn release rod 55.

[0094] The yarn accumulation detection sensor 56 can detect the amount of yarn accumulated in the yarn accumulation roller 51. The yarn accumulation detection sensor 56 is positioned relative to an appropriate location on the outer peripheral surface of the yarn accumulation roller 51. The yarn accumulation detection sensor 56 detects the presence of nonwoven yarn 5 at this location. The yarn accumulation detection sensor 56 sends the detected signal to the unit control unit 15. The unit control unit 15 can determine whether the yarn accumulation is above a predetermined amount based on this detection signal.

[0095] The yarn holding device 23 functions as a buffer for the yarn 5 because it can temporarily hold the spun yarn 5 on the outer periphery of the yarn holding roller 51. This eliminates undesirable situations (such as slack in the spun yarn 5) caused by a mismatch between the spinning speed and the winding speed (the travel speed of the spun yarn 5 wound on the package 7 described later) in the spinning device 22 for some reason.

[0096] A yarn monitoring device 47 is provided between the spinning device 22 and the yarn holding device 23. The yarn monitoring device 47 detects the state of the spun yarn 5 at a position upstream of the yarn holding device 23 (on the yarn feeding device side). The spun yarn 5 generated by the spinning device 22 passes through the yarn monitoring device 47 before being held by the yarn holding device 23.

[0097] The yarn monitoring device 47 monitors the quality of the traveling spun yarn 5 using a light sensor, detecting yarn defects contained in the spun yarn 5. Examples of yarn defects include abnormalities in the thickness of the spun yarn 5 and / or foreign matter contained in the spun yarn 5. When a yarn defect is detected, the yarn monitoring device 47 sends a yarn defect detection signal to the unit control unit 15. Alternatively, the yarn monitoring device 47 may use a sensor such as an electrostatic capacitive sensor instead of a light sensor to monitor the quality of the spun yarn 5. The yarn monitoring device 47 may also be configured to detect abnormal tension of the spun yarn 5 in addition to these yarn defects.

[0098] To maintain yarn quality, it is preferable to remove yarn defects and abnormal parts from the spun yarn 5. The unit control unit 15 determines whether to cut the spun yarn 5 based on the detection results of the yarn monitoring device 47. Cutting the spun yarn 5 is controlled by the unit control unit 15 to stop spinning based on the spinning device 22. Cutting the spun yarn 5 can also be achieved by stopping drafting based on the drafting device 21 (e.g., rotation of the back roller pair 41). When the supply of fiber bundles from the drafting device 21 to the spinning device 22 is stopped, spinning based on the spinning device 22 is substantially interrupted. Alternatively, the spinning unit 2 may have a cutter, and the unit control unit 15 may cut the spun yarn 5 using the cutter. When the spun yarn 5 is cut using the cutter, the unit control unit 15 controls the spinning based on the spinning device 22 to substantially interrupt it.

[0099] When the yarn 5 breaks between the spinning device 22 and the winding device 25, the suction device 24 can attract the yarn 5 on the package 7 side. The suction device 24 is provided between the yarn storage device 23 and the winding device 25. In this embodiment, the suction device 24 is fixed, but it can also be made somewhat movable. For example, the suction device 24 can also be made to move slightly closer to and away from the yarn path. In other words, the suction device 24 is made to move as it does not have to move as the suction nozzle 84. When the yarn receiving carriage 80 described later operates on the spinning unit 2, the suction device 24 is located upstream of the yarn receiving device 82 provided on the yarn receiving carriage 80. When the yarn 5 breaks, the suction device 24 can capture the yarn 5 on the winding device 25 side, in other words, the package 7 side, at a position upstream of the yarn receiving device 82.

[0100] The yarn feeding device 82 includes a yarn gathering rod (not shown). The spun yarn 5 captured by the suction device 24 is drawn into the yarn feeding device 82 by the action of the yarn gathering rod. The yarn feeding device 82 may also be configured to move in a direction that approaches or retracts relative to the yarn path.

[0101] The yarn receiving carriage 80 also has a suction nozzle 84. When the yarn 5 on the package 7 is not captured by the suction device 24, the suction nozzle 84 captures the yarn 5 instead of the suction device 24. The structure of the yarn receiving carriage 80 will be described later.

[0102] In the event of a break in the spun yarn 5, the unit control unit 15 determines whether or not to use the suction device 24, and appropriately controls the suction device 24 based on this determination. Details will be described later. The suction device 24 and the suction nozzle 84 are selectively selected and used to capture the spun yarn 5 on the package 7 side. Therefore, using the suction device 24 means not using the suction nozzle 84, and not using the suction device 24 means using the suction nozzle 84.

[0103] The decision to use / not use the suction device 24 is made, for example, by taking into account the reasons for the breakage of the spinning yarn 5 (spinning interruption factors). This decision will be described later.

[0104] When the unit control unit 15 decides to use the suction device 24, the suction device 24 is controlled by the unit control unit 15 to attract and capture the spun yarn 5 on the package 7 side at a position downstream of the yarn holding device 23 (guide 54). The suction device 24 starts to act on the spun yarn 5 after the spun yarn 5 is broken, which is a predetermined time before the yarn end of the spun yarn 5 on the package 7 side passes through the suction device 24.

[0105] The suction device 24 includes a suction tube 61. A suction port 62 is formed at the front end (one end in the longitudinal direction) of the suction tube 61. The suction port 62 opens toward the middle of the yarn path formed in the spinning unit 2. The suction tube 61 is connected to a negative pressure source such as a blower 113 via piping. As a result, a suction airflow can be generated in the suction port 62 (within the suction tube 61). Unlike the suction nozzle 84 described later, the suction tube 61 is fixedly provided in the spinning unit 2. Therefore, the position of the suction port 62 is constant.

[0106] In this embodiment, a gate 63 is provided in the suction device 24. The state of the suction device 24 is changed between a suction state and a suction stop state via the gate 63. The gate 63 is, for example, disposed between the suction port 62 and a portion of the suction device 24 downstream of the suction port 62 in the direction of airflow. The gate 63 can be, for example, constructed by an opening and closing mechanism having a plate-like component. The gate 63 can be opened and closed under the control of the unit control unit 15. By opening the gate 63 only when needed, energy savings can be achieved in the spinning machine 1. Furthermore, the gate 63 can also be omitted from the suction device 24.

[0107] A yarn capture detection sensor 64 is provided in the suction device 24. In this embodiment, the yarn capture detection sensor 64 is disposed downstream of the suction port 62 of the suction device 24. The yarn capture detection sensor 64 can detect whether the spun yarn 5 on the package 7 side is successfully captured by the suction device 24. The yarn capture detection sensor 64 detects the presence of non-woven yarn 5 downstream of the suction device 24 and sends a detection signal to the unit control unit 15. The unit control unit 15 can determine whether the capture by the suction device 24 is successful based on the detection signal from the yarn capture detection sensor 64. The yarn capture detection sensor 64 may also be disposed inside the suction tube 61.

[0108] The winding device 25 winds the spun yarn 5 that has passed through the yarn storage device 23 to form a package 7. The winding device 25 is positioned downstream of the yarn storage device 23.

[0109] The winding device 25 includes a cradle device 71, a winding rotation device 72, and a traversing device 73.

[0110] The cradle assembly 71 has a pair of rocker arms 74. The cradle assembly 71 is capable of rotatably supporting the yarn tube 7a (and thus the package 7) for winding the spun yarn 5 between the pair of rocker arms 74. The rocker arms 74 are rotatable about a pivot 75.

[0111] The package rotation device 72 includes a winding drum 76 and a drum drive motor 77. The winding drum 76 can contact the outer peripheral surface of the yarn tube 7a or the package 7. The output shaft of the drum drive motor 77 is connected to the winding drum 76 by a suitable means (e.g., a belt). By driving the winding drum 76 with the drum drive motor 77, the package 7 can be rotated in the winding direction. The drum drive motor 77 is configured to rotate in both directions. Therefore, the package 7 can also be rotated in the opposite direction to the winding direction.

[0112] The traversing device 73 includes a yarn guide 78 and a traversing drive motor 79. The yarn guide 78 is capable of hooking the spun yarn 5 wound on the package 7. The yarn guide 78 is capable of reciprocating in the width direction of the package 7. The output shaft of the traversing drive motor 79 is connected to the yarn guide 78 by a suitable means (e.g., a belt and pulleys). With the yarn guide 78 holding the spun yarn 5, the spun yarn 5 wound on the package 7 can be traversed by reciprocatingly driving the yarn guide 78 using the traversing drive motor 79.

[0113] The winding device 25 reciprocates the yarn guide 78 of the traversing device 73 while rotating the winding drum 76 of the package rotating device 72. Thus, the winding device 25 winds the spun yarn 5 onto the package 7 while traversing the yarn 5.

[0114] In this embodiment, each spinning unit 2 is provided with a separate bobbin drive motor 77. In addition, each spinning unit 2 is provided with a separate traverse drive motor 79. Therefore, the winding bobbin 76 and the yarn guide 78 can operate independently of the winding bobbins 76 and yarn guides 78 of the other spinning units 2.

[0115] like Figure 1 As shown, the spinning machine 1 is provided with a guide rail 101. The guide rail 101 is arranged to extend along the direction in which the plurality of spinning units 2 are arranged. The yarn receiving carriage 80 is configured to travel on the guide rail 101. Thus, the yarn receiving carriage 80 can move relative to the plurality of spinning units 2.

[0116] The yarn splicing carriage 80 travels to the working position corresponding to the spinning unit 2 where the spinning yarn 5 has been disconnected, and performs the yarn splicing process in the spinning unit 2. The yarn splicing carriage 80 performs the yarn splicing process in cooperation with the suction device 24 or the like provided by the spinning unit 2, or performs the yarn splicing process using the device provided by the yarn splicing carriage 80 (such as the suction nozzle 84 described later).

[0117] The yarn receiving trolley 80 has traveling wheels 81, yarn receiving device 82, suction pipe 83, suction nozzle 84 and trolley control unit 85.

[0118] The traveling wheels 81 are configured to be driven to rotate via a drive mechanism (e.g., a motor) that is not shown in the figure. Driven by the traveling wheels 81, the yarn receiving trolley 80 can travel relative to the plurality of spinning units 2 respectively.

[0119] The straw 83 is a component with a tubular portion. An opening is formed at the front end 88 of the straw 83. The straw 83 is connected to a suitable negative pressure source. Therefore, an airflow can be generated at the front end 88 of the straw 83. The straw 83 is supported in a rotatable manner. By rotating the straw 83, its front end 88 can approach or retract relative to the spinning device 22. After the spun yarn 5 is broken, the straw 83 can draw in and capture the newly fed spun yarn 5 from the spinning device 22 at a position close to the spinning device 22.

[0120] The suction nozzle 84 is a component with a tubular portion. An opening is formed at the front end 89 of the suction nozzle 84. The suction nozzle 84 is connected to a negative pressure source such as a blower 113. Therefore, a suction airflow can be generated at the opening at the front end 89 of the suction nozzle 84. The suction nozzle 84 is supported in a rotatable manner. By rotating the suction nozzle 84, the opening at its front end 89 can be moved to a position close to (close position) or a position retracted relative to the winding device 25 (retracted position). After the spun yarn 5 is broken, the suction nozzle 84 can suck in and capture the spun yarn 5 from the front end 89 at the position close to the winding device 25 (the winding 7 side).

[0121] The suction tube 83 rotates to one side, causing its tip 88 to move closer to the spinning device 22, capturing the end of the yarn 5 while close to the spinning device 22. The suction tube 83 then rotates to the other side. As a result, the tip 88 of the suction tube 83 moves away from the spinning device 22.

[0122] The suction nozzle 84 rotates to one side, causing its front end 89 to move towards the winding device 25, capturing the spun yarn 5 at a position close to the winding device 25. The suction nozzle 84 then rotates to the other side. As a result, the front end 89 of the suction nozzle 84 moves away from the winding device 25.

[0123] After the spun yarn 5 breaks, the yarn splicing device 82 splices the yarn 5 captured by the suction tube 83 on the spinning device 22 side with the yarn 5 captured by the suction device 24 or the suction nozzle 84 on the package 7 side. In this embodiment, the yarn splicing device 82 is a splicing device that twists the yarn ends together by a swirling airflow. The yarn splicing device 82 is not limited to the above-described splicing device and can also be, for example, a mechanical knotter.

[0124] When the yarn receiving trolley 80 is moving towards and stopping the spinning unit 2 where the spinning yarn 5 has been disconnected, as follows: Figure 5 As shown, the yarn receiving device 82 is located downstream of the suction device 24. Furthermore, in the state where the tip 89 of the suction nozzle 84 is retracted relative to the winding device 25 ( Figure 10 In the case of the solid line state, the yarn splicing device 82 is located downstream of the front end 89 of the suction nozzle 84.

[0125] The trolley control unit 85 is configured as a known computer having a CPU, ROM, RAM, etc. (not shown). The trolley control unit 85 controls the yarn splicing process performed by the yarn splicing trolley 80 by controlling the operation of the various parts of the yarn splicing trolley 80.

[0126] The yarn receiving carriage 80 is usually waiting at an appropriate position on the guide rail 101. If the yarn 5 breaks in a certain spinning unit 2, the yarn receiving carriage 80 moves to the spinning unit 2 where the yarn 5 broke.

[0127] Next, we will explain the separate use of the suction device 24 and the suction nozzle 84 when the yarn splicing process is carried out in the spinning unit 2.

[0128] The splicing process is performed near the moment when spinning begins to be interrupted, after the spun yarn 5 is disconnected from the yarn feeding device (spinning device 22) and the package 7. In this embodiment, there are two splicing processes, and one of them is selected.

[0129] like Figure 8As shown, the first action involves capturing the spinning yarn 5 on the winding device 25 side using the suction device 24 and then splicing the yarn using the splicing device 82 after the yarn splicing device 82 is in a state where the yarn splicing device 82 can pick up the spinning yarn 5. This action may be referred to as "fixed capture splicing" in the following text.

[0130] like Figure 10 As shown, the second action involves capturing the spinning yarn 5 on the winding device 25 side via the suction nozzle 84 and guiding the spinning yarn 5 so that the yarn splicing device 82 can pick up the spinning yarn 5, thereby splicing the yarn using the yarn splicing device 82. Hereinafter, this action may be referred to as "moving capture splicing".

[0131] In any action, the spinning yarn 5 on the side of the spinning device 22 is captured by the suction tube 83 and guided by the suction tube 83 so that the yarn receiving device 82 can pick up the spinning yarn 5.

[0132] In the event of a spinning interruption, the unit control unit 15 determines, based on various factors, whether to perform fixed or mobile yarn capture splicing.

[0133] Fixed-capture yarn splicing differs from mobile-capture yarn splicing in that it does not require the guiding action of the suction nozzle 84. Therefore, fixed-capture yarn splicing is preferred if energy saving is a consideration.

[0134] For example, consider the case where the yarn monitoring device 47 detects a yarn defect and cuts the spun yarn 5 to remove the defect. Assuming that during fixed-capture splicing, with the yarn end of the spun yarn 5 on the package 7 side captured by the suction device 24, it is necessary to stop the rotation of the package 7. However, since the package 7 is rotating at high speed at the moment the yarn monitoring device 47 detects the yarn defect, even if rotation stop control of the package 7 is immediately initiated, a certain length of the spun yarn 5 cannot be avoided from winding around the package 7 until the rotation of the package 7 actually stops.

[0135] When the amount of yarn stored in the yarn holding roller 51 is greater than or equal to a predetermined amount, even if the spinning yarn 5 is drawn from the yarn holding roller 51 from the moment the rotation stop control of the immediate start of the package 7 is activated until the package 7 actually stops, there will still be time for the suction device 24 to capture the spinning yarn 5. In other words, the state where there is time for the suction device 24 to capture the spinning yarn 5 means that even if only a small amount of spinning yarn 5 is stored in the yarn holding roller 51, the unit control unit 15 decides to perform a fixed capture and splicing operation.

[0136] If the yarn holding amount on the yarn holding roller 51 is less than the specified amount, the yarn end may pass through the suction device 24 due to insufficient capture of the spun yarn 5 before the package 7 actually stops rotating. In this case, the unit control unit 15 decides to perform a moving capture and splicing operation. Similarly, if the spun yarn 5 is cut at a position downstream of the suction device 24 due to abnormal tension generated during the winding process of the package 7, the unit control unit 15 also decides to perform a moving capture and splicing operation.

[0137] Regarding the determination of whether to perform fixed capture splicing or moving capture splicing, the above explanation is an example, and other criteria can also be used for judgment.

[0138] Next, the explanation is as follows: Figure 2 In the state where spinning is interrupted by the spinning device 22 and the spinning yarn 5 breaks, the actions of each part when the yarn is spliced ​​by the splicing device 82 are described. Hereinafter, the fixed capture splicing will be explained using the case where the spinning yarn 5 is cut based on the detection result of the yarn monitoring device 47 as an example.

[0139] First, the unit control unit 15 stops the yarn feeding based on the yarn defect detection signal input from the yarn monitoring device 47. By stopping the yarn feeding based on the yarn feeding device, the spun yarn 5 is cut. Thus, as... Figure 3 As shown, the spun yarn 5 breaks. The yarn defect detected by the yarn monitoring device 47 is contained in the spun yarn 5 on the package 7 side.

[0140] At an appropriate moment after the yarn monitoring device 47 detects a yarn defect, the unit control unit 15 sends a yarn splicing request signal to the trolley control unit 85. Upon receiving the yarn splicing request signal, the trolley control unit 85 causes the yarn splicing trolley 80 to proceed to the spinning unit 2 where yarn splicing is required due to a break in the spun yarn 5. The yarn splicing trolley 80 stops after proceeding to the target spinning unit 2.

[0141] At the moment the yarn monitoring device 47 detects a yarn defect, the unit control unit 15 decides whether to use the suction device 24 or the suction nozzle 84 for yarn splicing. In this example, the unit control unit 15 decides to perform fixed capture splicing, that is, to use the suction device 24.

[0142] In the case of fixed-capture yarn splicing, the unit control unit 15 performs deceleration control on the rotation of the package 7. Therefore, since the portion of the spun yarn 5 near the yarn end on the package 7 side passes through the suction device 24 at a low speed, it is easier to capture it based on the suction device 24. The deceleration control on the rotation of the package 7 can begin immediately after a yarn defect is detected or after spinning is interrupted, or it can begin when the yarn accumulation detection sensor 56 detects that the accumulation of the spun yarn 5 has fallen below a predetermined amount. Alternatively, after a yarn defect is detected or spinning is interrupted, the rotation of the package 7 can be temporarily and completely stopped, and then low-speed winding can be resumed.

[0143] The unit control unit 15 further reduces the rotational speed of the yarn holding roller 51. The reason for this will be explained later. Preferably, the reduction in the rotational speed of the yarn holding roller 51 is performed simultaneously with the reduction in the rotational speed of the package 7, but it can also be performed later than the reduction in the rotational speed of the package 7.

[0144] If the winding device 25 winds from Figure 3 If this process continues, the remaining yarn 5 in the yarn holding roller 51 of the yarn holding device 23 will be drawn out, and the amount of yarn 5 held in the yarn holding roller 51 will decrease. At this time, the yarn release rod 55 will... Figure 3 As shown, it remains stationary in the standby position P1. Therefore, the yarn hook member 53 contacts the spun yarn 5 unwound from the yarn holding roller 51, applying tension. The unit control unit 15 monitors the detection signal from the yarn holding amount detection sensor 56.

[0145] Shortly before the spun yarn 5 is released from the yarn holding device 23, the unit control unit 15 causes the yarn release lever 55 to... Figure 4 The yarn moves towards the yarn release position P2 as shown. This moment can be, for example, set as the time after the yarn accumulation detection sensor 56 detects that the accumulation of the spinning yarn 5 has fallen below a predetermined amount, and then the winding continues for a predetermined time. By moving the yarn release rod 55 towards the yarn release position P2, the yarn path of the spinning yarn 5 unwound from the yarn accumulation roller 51 is changed, and the spinning yarn 5 is released from the yarn hook member 53.

[0146] Almost simultaneously with the movement of the yarn release lever 55 towards the yarn release position P2, the unit control unit 15 opens the gate 63, initiating the attraction based on the attraction device 24. Almost simultaneously with the initiation of the attraction based on the attraction device 24, the unit control unit 15 stops the winding based on the winding device 25.

[0147] Although the rotation of package 7 stops, the yarn holding roller 51 of yarn holding device 23 continues to rotate. Furthermore, the change in yarn path via yarn release rod 55 results in the spun yarn 5 disengaging from yarn hook member 53. Therefore, the tension of the unwound spun yarn 5, which is released along with the rotation of yarn holding roller 51, decreases between yarn holding roller 51 and package 7. As a result, even before the yarn end of the spun yarn 5 on package 7 side detaches from yarn holding roller 51, it can still... Figure 4 That way, the suction device 24 attracts the middle part of the slack spun yarn 5.

[0148] If from Figure 4 If the yarn retention roller 51 continues to rotate further, then as follows: Figure 5 As shown, the spun yarn 5 can be sucked in and captured from the suction port 62 by the suction device 24. At this time, the yarn end of the spun yarn 5 is located inside the suction tube 61. Then, the unit control unit 15 returns the yarn release lever 55 to the standby position P1 at an appropriate time. Furthermore, the rotation of the yarn retention roller 51 is stopped. Figure 5 The image also shows the state of the yarn receiving carriage 80 arriving at the spinning unit 2 according to the aforementioned yarn receiving request signal.

[0149] In this embodiment, the rotation of the package 7 stops when a small amount of the spun yarn 5 remains on the yarn retention roller 51 on the package 7 side.

[0150] Theoretically, even if the package 7 is rotated while the yarn release lever 55 is held in standby position P1, and the rotation of the package 7 is stopped almost simultaneously with the detachment of the yarn end of the spun yarn 5 from the yarn holding roller 51, the yarn end can be captured by the suction device 24. However, the yarn end of the spun yarn 5 on the package 7 side, immediately after detaching from the yarn hook member 53, becomes unstable due to the sudden loss of tension. Therefore, the spun yarn 5 near the yarn end may not always pass near the suction port 62 of the suction device 24. Furthermore, if the rotation of the package 7 is stopped too early and the yarn end of the spun yarn 5 on the package 7 side remains on the yarn holding roller 51, capture failure will occur. On the other hand, if the rotation of the package 7 is stopped too late, the yarn end will pass through the suction port 62 of the suction device 24, still resulting in capture failure.

[0151] In this embodiment, the structure is as follows: While the spinning yarn 5 is continuously moving from the yarn holding roller 51 to the package 7, the rotation of the package 7 is stopped, and the yarn release rod 55 is further moved towards the yarn release position P2. This causes the spinning yarn 5 to detach from the yarn hook member 53. Furthermore, the rotation of the yarn holding roller 51 relaxes the spinning yarn 5, allowing the suction device 24 to capture the relaxed spinning yarn 5. Therefore, since the movement of the spinning yarn 5 is stable, it can be easily and smoothly captured by the suction device 24. Additionally, even if the rotation of the package 7 is stopped too early, capture failure is unlikely, thus eliminating the need for precise control of the rotation stop time.

[0152] As described above, the rotation of the yarn holding roller 51 is slowed down before the yarn release lever 55 moves towards the yarn release position P2, to a speed lower than the rotational speed before the spun yarn 5 breaks. Therefore, when the yarn release lever 55 moves towards the yarn release position P2 and the spun yarn 5 disengages from the yarn hook member 53, the speed at which the yarn holding roller 51 delivers the spun yarn 5 can be reduced. As a result, since the spun yarn 5 can be prevented from slackening rapidly, the spun yarn 5 on the package 7 side can be easily captured by the suction device 24.

[0153] The traverse amplitude of the traverse device 73 can be made narrower than usual in relation to the deceleration of the rotation of the package 7 in the winding device 25. For example, it is preferable to set the traverse amplitude to less than half of the traverse amplitude before the yarn 5 is broken (maximum traverse amplitude). The shortening of the traverse amplitude continues until the rotation of the package 7 in the winding direction stops. At this time, it is also possible not only to narrow the traverse amplitude, but also to decelerate the traverse speed of the traverse device 73.

[0154] As described above, when the rotational speed of the package 7 is reduced, the tension of the spinning yarn 5 on the package 7 side becomes unstable. Therefore, the position where the spinning yarn 5 is guided to the outer periphery of the package 7 by the yarn guide 78 easily becomes unstable. Considering this situation, it is preferable to shorten the traverse amplitude as described above to prevent the spinning yarn 5 from being wound to a position where it detaches from the width of the package 7 (hereinafter referred to as end-face drop).

[0155] Based on the detection result of the yarn capture detection sensor 64, the unit control unit 15 determines whether the capture performed by the suction device 24 was successful. The case where the capture performed by the suction device 24 is deemed to have failed will be described later.

[0156] If the capture based on the suction device 24 is deemed successful, the unit control unit 15 reverses the package 7 as needed, stopping it again. This is because if the yarn defect contained in the spinning yarn 5 on the package 7 side is long, the spinning yarn 5 must be unwound from the package 7 and the suction device 24 must be used to remove the yarn defect. Then, the unit control unit 15 determines whether the yarn receiving carriage 80 has arrived at the spinning unit 2, and if not, waits until the yarn receiving carriage 80 arrives.

[0157] With the yarn receiving trolley 80 stopped at the working position corresponding to the spinning unit 2, the suction port 62 of the suction device 24 is located upstream of the yarn receiving device 82. Therefore, if the yarn receiving trolley 80 arrives, the spun yarn 5 held by the suction device 24 on the package 7 side will... Figure 5 As shown, it is positioned so that it faces the yarn receiving device 82 of the yarn receiving carriage 80.

[0158] After the yarn receiving trolley 80 is stopped, the trolley control unit 85 controls the yarn receiving trolley 80 to make the suction pipe 83... Figure 6 As shown by the dotted line, it moves towards a position where it can capture the spinning yarn 5 on the side of the spinning device 22. Almost simultaneously, the unit control unit 15 restarts supplying the spinning yarn 5 from the yarn feeding device. In addition, the rotation of the yarn holding roller 51 and the yarn hook member 53 restarts.

[0159] At the initial stage of restarting spinning, the yarn 5 supplied from the spinning device 22 is drawn out by the air suction flow of the suction tube 83. Because the tension applied to the yarn 5 for drawing it out of the spinning device 22 is weak and unstable, the quality of the yarn 5 generated by the spinning device 22 is low at the initial stage of restarting spinning. Hereinafter, the spinning immediately after restarting (starting) spinning will be referred to as yarn drawing-out spinning. It is also possible to differentiate the spinning conditions (e.g., the draft ratio of the drafting device 21 stretching the fiber bundle 4b) in the spinning unit 2 from those in normal spinning for the purpose of preventing fiber blockage in the spinning device 22.

[0160] The trolley control unit 85 causes the spinning yarn 5 captured by the suction tube 83 on the side of the spinning device 22 to... Figure 6 As shown by the solid line, the yarn is guided to the lower yarn receiving device 82.

[0161] At this time, the yarn release lever 55 remains in the standby position P1. Therefore, the spinning yarn 5 drawn from the spinning device 22 is hooked onto the yarn hook component 53, and the spinning yarn 5 is driven by the rotating yarn hook component 53. Figure 6 As shown, it is wound around the yarn retention roller 51.

[0162] If a predetermined time has elapsed since the spinning yarn 5 was wound onto the yarn holding roller 51, and a length of the spinning yarn 5 exceeding the required minimum holding amount has been held on the yarn holding roller 51, then the spinning yarn 5 is drawn out of the spinning device 22 with stable tension and speed. Therefore, stable spinning occurs in the spinning device 22. In this way, the spinning unit 2 transitions from yarn drawing to normal spinning.

[0163] Even if spinning unit 2 is switched to normal spinning, low-quality spun yarn 5 generated from the previous yarn lead-out spinning will remain in the yarn retention roller 51. Therefore, the unit control unit 15, before switching to normal spinning, such as Figure 7 As shown, the yarn release lever 55 is moved toward the yarn release position P2. As a result, the spun yarn 5 wound on the yarn holding roller 51 is unwound from the yarn holding roller 51, attracted by the suction tube 83, and discarded.

[0164] After all the yarn 5 that should be removed has been unwound from the yarn retention roller 51, the unit control unit 15 moves the yarn release rod 55 towards... Figure 8 The movement of the standby position P1 is controlled as shown. As a result, the spinning yarn 5 is hooked onto the yarn hooking component 53 again, and the amount of spinning yarn 5 stored in the yarn storage roller 51 increases.

[0165] In this state, the trolley control unit 85 activates the yarn splicing device 82 to splice the yarn 5 attracted by the suction device 24 from the winding device 25 side with the yarn 5 from the spinning device 22 side. During the splicing process, the yarn 5 is continuously supplied from the yarn feeding device, but the yarn 5 is stored by the yarn storage device 23.

[0166] During splicing, excess yarn 5 is cut off in the splicing device 82. This cutting separates the defective portion of the yarn detected by the yarn monitoring device 47 from the yarn 5 on the package side 7. The cut excess yarn 5 is then sucked in by the suction device 24 or the suction tube 83 and discarded.

[0167] Almost simultaneously with the completion of yarn splicing, the winding device 25 is driven, and winding of the package 7 based on the winding device 25 resumes. At the appropriate moment after the yarn splicing is completed, the gate 63 is closed. In this way, the spinning unit 2 returns to... Figure 2 The usual state.

[0168] Figure 9 The flowchart, based on the premise of fixed-capture splicing, shows the actions from the detection of yarn defects to the completion of splicing preparation of the spun yarn 5 on the package 7 side. The following refers to... Figure 9 To put it simply.

[0169] exist Figure 2 While the spinning yarn 5 is wound onto the package 7 in the desired state, the yarn monitoring device 47 monitors for yarn defects (step S101). If a yarn defect is detected, the spinning device 22 stops spinning, resulting in, for example... Figure 3 That way, the spinning yarn 5 breaks (step S102).

[0170] In the fixed capture yarn splicing, immediately after the spinning device 22 interrupts spinning, the winding device 25 slows down the rotation of the package 7, and the yarn storage device 23 slows down the rotation of the yarn storage roller 51 (step S103).

[0171] With both the yarn holding roller 51 and the package 7 rotating at low speed, the amount of yarn held in the yarn holding roller 51 is monitored by the yarn holding amount detection sensor 56 (step S104).

[0172] If the yarn retention amount in yarn retention roller 51 is less than the specified amount, then as follows Figure 4 As shown, the yarn release lever 55 moves from the standby position P1 to the yarn release position P2 (step S105). Almost simultaneously, the winding device 25 stops the rotation of the package 7, and the suction device 24 opens the gate 63 to generate a suction airflow (step S106). Thus, the spun yarn 5, detached from the yarn hook member 53, is fed downstream by the rotation of the yarn retention roller 51, and the slack spun yarn 5... Figure 4 They are attracted by the attraction device 24.

[0173] Then, the spinning unit 2 is left on standby until no more yarn 5 remains on the continuously rotating yarn accumulation roller 51 (step S107). This process can be achieved, for example, by simply leaving it on standby until a predetermined time has elapsed. Alternatively, a yarn detection sensor can be placed at an appropriate location on the spinning unit 2 (e.g., near the guide 54), and the spinning unit 2 can be left on standby until the yarn detection sensor no longer detects any yarn 5.

[0174] If so Figure 5 Once the spinning yarn 5 is completely unwound from the yarn holding roller 51, the yarn release lever 55 returns from the yarn release position P2 to the standby position P1 (step S108), and the rotation of the yarn holding roller 51 stops (step S109). The time when the yarn release lever 55 returns from the yarn release position P2 to the standby position P1 is after the moment when the spinning yarn 5 stored in the yarn holding roller 51 is completely unwound and attracted by the attraction device 24, and before the start of the next yarn lead-out spinning. Since yarn lead-out spinning is a type of spinning, it can be said that the start of yarn lead-out spinning is the end of the interruption of spinning.

[0175] Next, we will explain the situation where spinning is interrupted and the unit control unit 15 decides to perform a moving capture and yarn splicing.

[0176] When a breakage occurs in the spinning yarn 5 and a decision is made to perform a moving capture splicing, the unit control unit 15 continues the rotation of the package 7. As a result, the yarn end of the spinning yarn 5 on the package 7 side is wound around the package 7. In the case of moving capture splicing, the unit control unit 15 controls the operation by keeping the gate 63 of the suction device 24 closed. Alternatively, if the gate 63 is open, the unit control unit 15 controls the operation by closing the gate 63. Therefore, the yarn end of the spinning yarn 5 on the package 7 side is not sucked into the suction port 62 of the suction device 24. Then, the yarn end of the spinning yarn 5 on the package 7 side moves to the vicinity of or to the outer peripheral surface of the package 7.

[0177] Alternatively, before the spinning yarn 5 on the package 7 side is fully wound into the package 7, the unit control unit 15 controls the winding device 25 such that the rotational speed of the package 7 in the winding direction is lower than that before the spinning yarn 5 is disconnected. This weakens the tendency of the yarn end of the spinning yarn 5 on the package 7 side to wind onto the outer periphery of the package 7, making it easier for the yarn end to separate from the spinning yarn 5 on the outer periphery of the package 7. Therefore, the yarn end can then be easily captured by the suction nozzle 84. Alternatively, the rotation of the package 7 can be stopped just before the spinning yarn 5 on the package 7 side is fully wound into the package 7.

[0178] During the process of winding the yarn 5 on the side of the package 7 by rotating the package 7 in the winding direction, the traverse amplitude of the traverse device 73 can be narrower than usual. For example, it is preferable to set the traverse amplitude to less than 1 / 2 of the traverse amplitude before the yarn 5 breaks. The shortening of the traverse amplitude continues until the rotation of the package 7 in the winding direction stops. As a result, the position of the yarn end of the yarn 5 on the side of the package 7 is less likely to deviate in the package width direction. Therefore, the yarn end can be easily caught by the suction nozzle 84 afterwards. However, the traverse device 73 may also maintain its normal amplitude without shortening the traverse amplitude.

[0179] When the rotational speed of the package 7 is reduced as described above, the tension of the spun yarn 5 on the package 7 side becomes unstable. Therefore, for the same reasons as above, it is particularly preferable to shorten the traverse amplitude to avoid end face drop.

[0180] Then, the unit control unit 15 determines whether the yarn receiving carriage 80 has arrived at the spinning unit 2, and waits until the yarn receiving carriage 80 arrives if it has not arrived.

[0181] If the yarn receiving trolley 80 reaches the working position for the spinning unit 2, then the suction nozzle 84 will... Figure 10The yarn approaches the winding device 25 as shown by the dotted line. In this state, the winding device 25's winding rotation device 72 rotates the package 7 in the opposite direction to the winding direction. As a result, the suction nozzle 84 can capture the spun yarn 5 on the package 7 side. The opposite rotation of the package 7 continues until all the portion of the spun yarn 5 on the package 7 side, including yarn defects, is attracted by the suction nozzle 84. The suction nozzle 84 then retracts from the winding device 25. As a result, the spun yarn 5 on the package 7 side is guided to the yarn splicing device 82. The other actions of the yarn splicing trolley 80 are the same as those described above for fixed capture and splicing.

[0182] There are also cases where, although an attempt is made to fix the yarn capture splice, the yarn 5 on the package 7 side cannot be captured by the suction device 24 for some reason. The failure to capture the yarn 5 can be detected by the yarn capture detection sensor 64. In the case of failure to capture the yarn 5 based on the suction device 24, the unit control unit 15 decides to switch to moving yarn capture splice. Before using the suction nozzle 84, further winding of the yarn 5 on the package 7 side is performed based on the winding device 25. As a result, since the yarn end that failed to capture based on the suction device 24 moves to the vicinity or outer peripheral surface of the package 7, the yarn 5 on the package 7 side can be reliably captured by the suction nozzle 84.

[0183] Next, we will explain the control measures in case of yarn splicing failure based on the yarn splicing device 82.

[0184] Considering Figure 8 or Figure 10 The situation shown illustrates a scenario where the yarn splicing performed by the splicing device 82 fails for some reason. The failure can be detected, for example, by a suitable yarn detection sensor. The failure is detected, for example, immediately after the splicing operation based on the splicing device 82. In the event of a splicing failure, the spinning unit 2 stops drafting based on the drafting device 21, spinning based on the spinning device 22, and winding of the package 7 based on the winding device 25. Splicing is stopped by the spinning device 22, and the spun yarn 5 is cut between the spinning device 22 and the yarn retention roller 51.

[0185] In the case of a failed yarn splicing, the spun yarn 5 becomes discontinuous again between the spinning device 22 and the package 7. That is, in this spinning unit 2, a spun yarn 5 is produced with one yarn end positioned between the spinning device 22 and the yarn holding roller 51, and another yarn end positioned between the yarn holding roller 51 and the splicing device 82. Furthermore, yarn ends are also generated in the spun yarn 5 connected to the package 7.

[0186] The spun yarn 5, which has a yarn end located downstream of the yarn splicing device 82, is wound onto the package 7 as the rotation of the package 7 is decelerated and stopped based on the winding device 25.

[0187] In the aforementioned state, yarn splicing based on the yarn splicing device 82 needs to be performed again. However, before splicing based on the yarn splicing device 82, it is necessary to remove the remaining yarn 5 on the yarn holding roller 51. In order to remove the yarn 5 from the yarn holding roller 51, the unit control unit 15 moves the yarn release lever 55 to the yarn release position P2 while rotating the yarn holding roller 51 clockwise, thereby disengaging the yarn 5 from the yarn hook member 53.

[0188] During the period when the yarn holding roller 51 is rotating forward and the yarn release lever 55 is in the yarn release position P2, the suction device 24 is activated. Therefore, since the yarn 5 downstream of the yarn holding roller 51 is captured by the suction device 24, the yarn 5 remains continuous between the yarn holding roller 51 and the suction device 24. The remaining yarn 5 on the yarn holding roller 51 is unwound sequentially and removed by the suction device 24. After all the remaining yarn 5 on the yarn holding roller 51 has been removed, the rotation of the yarn holding roller 51 stops, the yarn release lever 55 returns to the standby position P1, and the suction based on the suction device 24 also stops. Then, the aforementioned moving capture and splicing process is performed.

[0189] As described above, the spinning machine 1 of this embodiment includes a spinning device 22, a winding device 25, a yarn holding device 23, a suction device 24, and a yarn release bar 55. The spinning device 22 is capable of generating and supplying spun yarn 5 by spinning a fiber bundle 4b. The winding device 25 winds the spun yarn 5 supplied from the spinning device 22 to form a package 7. The yarn holding device 23 is disposed in the yarn path formed between the spinning device 22 and the winding device 25. The suction device 24 is fixedly provided to attract the spun yarn 5 at a position downstream of the yarn traveling from the yarn holding device 23. The yarn release bar 55 can change the yarn path by moving between a standby position P1 and a yarn release position P2. The yarn holding device 23 includes a yarn holding roller 51 and a yarn hook member 53. The yarn holding roller 51 can wind the spinning yarn 5 around its outer periphery and hold the spinning yarn 5. The yarn hook member 53 is rotatably configured to apply tension to the spinning yarn 5 by hooking the spinning yarn 5 unwound from the yarn holding roller 51. The yarn release bar 55 can release the spinning yarn 5 from the yarn hook member 53 by moving from the standby position P1 to the yarn release position P2. After the spinning yarn 5 is disconnected between the spinning device 22 and the yarn holding device 23, the spinning yarn 5 remains in the yarn holding roller 51, and is released from the yarn hook member 53 by rotating the yarn holding roller 51 while moving the yarn release bar 55 to the yarn release position P2. During the period when the yarn holding roller 51 is rotating and the yarn release bar 55 is in the yarn release position P2, the suction device 24 is in the suction state.

[0190] Therefore, after the spinning yarn 5 breaks, the spinning yarn 5 on the side of the package 7 can be reliably captured by the suction device 24.

[0191] In the spinning machine 1 of this embodiment, when the spun yarn 5 breaks between the spinning device 22 and the yarn holding device 23, two cases are considered: the spun yarn 5 is continuous between the yarn holding roller 51 and the package 7, and the spun yarn 5 is broken. For example, if the yarn splicing based on the splicing device 82 fails, the spun yarn 5 also breaks between the yarn holding roller 51 and the package 7. In this case, while the spun yarn 5 remains on the yarn holding roller 51, the yarn release bar 55 is moved towards the yarn release position P2 while the yarn holding roller 51 is rotated, causing the spun yarn 5 to detach from the yarn hook member 53. During the period when the yarn holding roller 51 is rotating and the yarn release bar 55 is at the yarn release position P2, the suction device 24 is put into a suction state, and the remaining spun yarn 5 on the yarn holding roller 51 is removed by suction using the suction device 24.

[0192] If the spinning yarn 5 breaks between the yarn holding roller 51 and the package 7, it is impossible to draw the spinning yarn 5 out of the yarn holding roller 51 by winding the package 7. However, with the structure described above, the suction device 24 can capture and properly remove the spinning yarn 5 remaining in the yarn holding roller 51.

[0193] The spinning machine 1 of this embodiment includes a spinning device 22, a winding device 25, a yarn retention device 23, a suction device 24, and a yarn release bar 55. The spinning device 22 is capable of generating and supplying spun yarn 5 by spinning a fiber bundle 4b. The winding device 25 winds the spun yarn 5 supplied from the spinning device 22 to form a package 7. The yarn retention device 23 is disposed in the yarn path formed between the spinning device 22 and the winding device 25. The suction device 24 is fixedly provided and capable of attracting the spun yarn 5 at a position downstream of the yarn travel of the yarn retention device 23. The yarn release bar 55 changes the yarn path. The yarn retention device 23 includes a yarn retention roller 51 and a yarn hook member 53. The yarn retention roller 51 is capable of winding the spun yarn 5 around its outer periphery to retain the spun yarn 5. The yarn hook component 53 is rotatably configured to apply tension to the spun yarn 5 by hooking it as it unwinds from the yarn holding roller 51. The yarn release rod 55 alters the yarn path of the spun yarn 5 unwinding from the yarn holding roller 51 in conjunction with the interruption of spinning.

[0194] Therefore, after the spinning yarn 5 breaks, the spinning yarn 5 on the side of the package 7 can be reliably captured by the suction device 24.

[0195] The spinning machine 1 of this embodiment includes multiple spinning units 2. Each spinning unit 2 includes a spinning device 22, a yarn holding device 23, and a winding device 25. A yarn release bar 55 and a drive unit for driving the yarn release bar 55 are provided in each spinning unit 2.

[0196] Therefore, the yarn release lever 55 can operate independently of the yarn release levers 55 of other spinning units 2. Thus, the yarn release lever 55 can be driven at a time that does not depend on the operation of the yarn release levers 55 of other spinning units 2.

[0197] In the spinning machine 1 of this embodiment, when the spinning device 22 is spinning yarn, the yarn release rod 55 moves to the yarn release position P2 for discarding the spun yarn 5 wound on the yarn storage roller 51.

[0198] Therefore, the yarn release bar 55 can achieve two functions: it allows the yarn 5 on the package 7 side to be easily captured by the suction device 24, and it discards the yarn 5 on the spinning device 22 side when the yarn is drawn out during spinning. Therefore, the structure can be simplified.

[0199] In the spinning machine 1 of this embodiment, after all the spinning yarn 5 has unwound from the yarn holding roller 51 and the spinning yarn 5 has been attracted by the attraction device 24, the yarn release rod 55 returns to the standby position P1 where the yarn path change is cancelled.

[0200] Therefore, the spun yarn 5 on the package 7 side can be reliably captured by the suction device 24. If the yarn release rod 55 returns to the standby position P1 too early, there is also a possibility that the spun yarn 5 may not be completely unwound from the yarn holding roller 51 and may remain on the yarn holding roller 51.

[0201] In the spinning machine 1 of this embodiment, after spinning is interrupted, and after the rotational speed of the yarn holding roller 51 is reduced, the yarn release rod 55 moves from the standby position P1 to the yarn release position P2 in order to change the yarn path.

[0202] Therefore, during the period after spinning is interrupted and before the yarn release bar 55 moves, the remaining spun yarn 5 in the yarn holding roller 51 can be wound onto the package 7. As a result, the amount of broken yarn generated in the spinning machine 1 can be reduced. In addition, since the yarn release bar 55 moves after the rotational speed of the yarn holding roller 51 has been reduced, the spun yarn 5 on the package 7 side can be easily captured by the suction device 24.

[0203] The spinning machine 1 of this embodiment includes multiple spinning units 2. Each spinning unit 2 includes a spinning device 22, a winding device 25, and a yarn storage device 23. The winding device 25 of each spinning unit 2 includes a traversing device 73 that traverses the yarn 5 wound by the winding device 25. When the yarn 5 is disconnected between the spinning device 22 and the winding device 25 in the spinning unit 2, the yarn 5 on the winding device 25 side is wound onto a package 7 while the traversing amplitude of the yarn 5 traversed by the traversing device 73 is narrower than the traversing amplitude before the yarn 5 is disconnected.

[0204] This prevents end face drop during roll 7. Therefore, it improves the quality of roll 7.

[0205] The spinning machine 1 of this embodiment is equipped with a yarn retention detection sensor 56 for detecting the yarn retention amount of the yarn retention roller 51.

[0206] Therefore, in order to capture the spinning yarn 5 on the side of the package 7 using the suction device 24, the rotation of the package 7 can be stopped at the appropriate time based on the detection result of the yarn retention detection sensor 56.

[0207] In the spinning machine 1 of this embodiment, when the spinning yarn 5 is disconnected between the spinning device 22 and the yarn storage device 23, such as Figure 3As shown, when the spun yarn 5 is continuously spun between the yarn holding roller 51 and the package 7, the unwinding of the yarn holding roller 51 ends, and the spun yarn 5 is attracted by the attraction device 24 as shown. Figure 5 As shown, this is a continuous state between the suction device 24 and the roll 7.

[0208] Therefore, after the spinning yarn 5 breaks, the spinning yarn 5 on the side of the package 7 can be reliably captured by the suction device 24.

[0209] Next, a first variation of the above-described embodiment will be described. In the following description of this variation, there will be instances where the same or similar components as those in the above-described embodiment are labeled with the same reference numerals in the drawings and descriptions are omitted.

[0210] In this variation, in each spinning unit 2, for example in Figure 4 A yarn moving device is provided at the location indicated by reference numeral 65 in the attached drawing. This yarn moving device 65 moves the spun yarn 5 on the package 7 side in a manner that brings it closer to the suction port 62 of the suction device 24. The yarn moving device 65 can be configured, for example, as a nozzle device that sprays compressed air toward the suction port 62. This assists in capturing the spun yarn 5 on the package 7 side based on the suction device 24.

[0211] The yarn moving device 65 is not limited to a structure that sprays compressed air onto the spinning yarn 5. For example, the yarn moving device 65 can be configured to have a rod-shaped movable member that can contact the spinning yarn 5 and push the spinning yarn 5 toward the suction port 62. Alternatively, the yarn moving device 65 may not be provided with a specific structure. Figure 4 The location indicated by reference numeral 65 is instead designated as an air sucker that generates an auxiliary suction flow inside the suction tube 61 by being supplied with compressed air.

[0212] As described above, the spinning machine of this modified example is equipped with a yarn moving device 65 that actively moves the spun yarn 5 toward the suction device 24.

[0213] Thus, the spinning yarn 5 on the side of the package 7 can be reliably captured by the suction device 24.

[0214] Next, we will explain the second variation.

[0215] In this variation, the yarn hook member 53 includes a telescopic mechanism (not shown). The structure of the telescopic mechanism is arbitrary; for example, a miniature cylinder can be used. Through this telescopic mechanism, the yarn hook member 53 is configured to extend and retract radially along the yarn holding roller 51. The yarn hook member 53 is normally in an extended state, but can disengage the hooked yarn 5 by contraction.

[0216] In this variation, instead of in Figure 9 In step S105, the yarn release rod 55 is moved towards the yarn release position P2, but the yarn hook member 53 is deformed by shortening its length. This allows the spun yarn 5 to detach from the yarn hook member 53. By rotating the yarn retention roller 51 in this state, the spun yarn 5 on the package 7 side can be unwound from the yarn retention roller 51. As a result, the spun yarn 5 can be relaxed between the yarn retention roller 51 and the package 7, and... Figure 4 That way, the attraction device 24 attracts the spinning yarn 5.

[0217] In the contracted state, the yarn hook member 53 does not act on the spinning yarn 5. Therefore, this state can also be referred to as the invalid state. The invalid state can also be achieved, for example, by bending the yarn hook member 53 instead of contracting it. The shape of the contracted yarn hook member 53 or the shape of the bent yarn hook member 53 can be referred to as the invalid shape.

[0218] As described above, the spinning machine 1 of this modified example includes a spinning device 22, a winding device 25, a yarn retention roller 51, an electric motor 52, a yarn hook member 53, and a suction device 24. The spinning device 22 is capable of generating and supplying spun yarn 5 by spinning a fiber bundle 4b. The winding device 25 winds the spun yarn 5 supplied from the spinning device 22 to form a package 7. The yarn retention roller 51 is disposed in the yarn path formed between the spinning device 22 and the winding device 25. The electric motor 52 drives the yarn retention roller 51 to rotate. The yarn hook member 53 contacts the spun yarn 5 unwound from the yarn retention roller 51 and applies tension to the spun yarn 5. The suction device 24 is fixedly provided and is capable of attracting the spun yarn 5 at a position downstream of the yarn travel of the yarn retention roller 51. In connection with the interruption of spinning, when the spinning yarn 5 remains in the yarn holding roller 51 and the spinning yarn 5 is connected between the yarn holding roller 51 and the package 7, the yarn hook member 53 is shortened to make the yarn hook member 53 deform into an ineffective shape.

[0219] Therefore, after the spinning yarn 5 breaks, the spinning yarn 5 on the side of the package 7 can be reliably captured by the suction device 24.

[0220] Next, a third variation of the above-described embodiment will be described.

[0221] exist Figure 11 The yarn retention device 23x of this modified example is shown in the figure. In this yarn retention device 23x, the yarn retention roller 51 and the yarn hook component 53 are driven independently by different motors.

[0222] The yarn retention device 23x of this modified example includes a roller drive motor 52a and a yarn hook component drive motor 52b.

[0223] A drive pulley 121 is fixed to the output shaft of the roller drive motor 52a. A bobbin 122 is formed on the yarn storage roller 51, and a driven pulley 123 is fixed to the bobbin 122. The drive pulley 121 and the driven pulley 123 are connected by a transmission belt 124.

[0224] The output shaft of the yarn hook component drive motor 52b is inserted through the bobbin 122. The bobbin 122 is capable of rotating relative to the output shaft of the yarn hook component drive motor 52b.

[0225] A yarn hook shaft 125 is rotatably supported on the yarn holding roller 51. The axis of the yarn hook shaft 125 is aligned with the axis of the yarn holding roller 51 and the axis of the bobbin 122. The front end of the output shaft of the yarn hook component drive motor 52b is connected to the yarn hook shaft 125, for example, via a hysteresis material. A yarn hook component 53 is fixed on the yarn hook shaft 125.

[0226] In this structure, the yarn holding roller 51 is driven to rotate by the roller drive motor 52a, and the yarn hook component 53 is driven to rotate by the yarn hook component drive motor 52b. Figure 11 The structure described is one example; the yarn holding roller 51 and the yarn hook component 53 can also be driven independently of each other through other structures. For example, the motor driving the yarn holding roller 51 and the motor driving the yarn hook component 53 can also be arranged inside the yarn holding roller 51.

[0227] In this variation, Figure 11 The yarn retention device 23x shown is used instead of the yarn retention device 23 in the above embodiment. Before the spinning yarn 5 breaks... Figure 2 In this state, the yarn storing roller 51 and the yarn hook member 53 of the yarn storing device 23x rotate forward at the same speed, thereby controlling the roller drive motor 52a and the yarn hook member drive motor 52b. Thus, the same function as the yarn storing device 23 in the above embodiment can be achieved.

[0228] In this variation, instead of in Figure 9 In step S105, the yarn release lever 55 is moved towards the yarn release position P2, and the forward rotation of the yarn hook component 53 is stopped. At this time, the yarn hook component 53 is preferably stopped at a position that will not interfere with the unwinding of the spinning yarn 5 from the yarn retention roller 51. However, the forward rotation of the yarn retention roller 51 continues.

[0229] In this modified example, corresponding to the forward rotation of the yarn retention roller 51, the spun yarn 5 on the package 7 side unwinds from the yarn retention roller 51. Therefore, it is possible to... Figure 4 That way, the suction device 24 attracts the loose spinning yarn 5.

[0230] Alternatively, instead of rotating the yarn holding roller 51 forward and stopping the forward rotation of the yarn hook member 53, the forward rotation of the yarn holding roller 51 can be stopped and the yarn hook member 53 reversed. In this case, corresponding to the reverse rotation of the yarn hook member 53, the spun yarn 5 on the package 7 side unwinds from the yarn holding roller 51. Therefore, as described above, the suction device 24 can attract the slack spun yarn 5. To prevent the spun yarn 5 from slackening abruptly, it is preferable that the reverse rotation of the yarn hook member 53 is performed at an appropriately low speed.

[0231] As described above, the spinning machine 1 of this modified example includes a spinning device 22, a winding device 25, a yarn retention roller 51, a roller drive motor 52a, a yarn hook member 53, and a suction device 24. The spinning device 22 is capable of generating and supplying spun yarn 5 by spinning a fiber bundle 4b. The winding device 25 winds the spun yarn 5 supplied from the spinning device 22 to form a package 7. The yarn retention roller 51 is disposed in the yarn path formed between the spinning device 22 and the winding device 25. The roller drive motor 52a drives the yarn retention roller 51. The yarn hook member 53 contacts the spun yarn 5 unwound from the yarn retention roller 51 and applies tension to the spun yarn 5. The suction device 24 is capable of attracting the spun yarn 5 at a position downstream of the yarn travel of the yarn retention roller 51. In connection with the interruption of spinning, when the spinning yarn 5 remains on the yarn holding roller 51 and is connected between the yarn holding roller 51 and the package 7, the rotation of the yarn hook member 53 is stopped. Alternatively, in connection with the interruption of spinning, when the spinning yarn 5 remains on the yarn holding roller 51 and is connected between the yarn holding roller 51 and the package 7, the rotation of the yarn holding roller 51 is stopped by stopping the drive of the roller drive motor 52a, and the yarn hook member 53 rotates in the direction of unwinding the spinning yarn 5 from the yarn holding roller 51.

[0232] Therefore, after the spinning yarn 5 breaks, the spinning yarn 5 on the side of the package 7 can be reliably captured by the suction device 24.

[0233] The spinning machine of this modification includes a yarn hook drive motor 52b that drives the yarn hook component 53.

[0234] Therefore, the rotation of the yarn holding roller 51 and the rotation of the yarn hook component 53 can be controlled independently.

[0235] The preferred embodiments and modifications of the present invention have been described above, but the above structure can be modified as follows. Modifications can be made individually or by arbitrarily combining multiple modifications.

[0236] It can also be controlled by changing the movement of the yarn release rod 55 toward the yarn release position P2 based on the length of the yarn defect detected by the yarn monitoring device 47, the start of the attraction based on the attraction device 24, and the timing of the rotation stop of the winding 7.

[0237] In the above-described embodiments, the yarn release bar 55 can be configured to change its position by moving in parallel rather than rotating.

[0238] Multiple yarn accumulation detection sensors 56 can also be provided. For example, multiple yarn accumulation detection sensors 56 can be arranged in a manner that follows the axial direction of the yarn accumulation roller 51. By comparing with... Figure 4 The yarn retention detection sensor 56 shown is positioned at a location roughly equivalent to the amount of yarn retained, allowing for the detection of the presence or absence of yarn. This enables high-precision detection of the moment when the yarn end of the spun yarn 5 on the package 7 side detaches from the yarn retention roller 51. Therefore, the rotation of the package 7 can be stopped at the precise moment. As a result, excessively long spun yarn 5 is prevented from being sucked into the suction device 24 and discarded during splicing, thus avoiding waste.

[0239] Alternatively, it can be configured to omit the gate 63 of the suction device 24, while a suction airflow is always generated in the suction port 62.

[0240] In the case of failure of yarn splicing based on the yarn splicing device 82 (in other words, when the spinning yarn 5 is disconnected between the yarn holding roller 51 and the package 7), instead of unwinding the spinning yarn 5 from the yarn holding roller 51 by the action of the yarn release rod 55, the spinning yarn 5 can be unwound from the yarn holding roller 51 by the structure of the second or third modification described above.

[0241] Alternatively, a conveying roller can be configured between the spinning device 22 and the yarn storage roller 51 to convey the spinning yarn 5 in a manner that clamps the spinning yarn 5.

Claims

1. Spinning machine, characterized in that, Possessing: a spinning device capable of generating and supplying a yarn by spinning a fiber bundle; a winding device that winds the yarn supplied from the spinning device to form a package; a yarn storage device disposed in a yarn path formed between the spinning device and the winding device; a suction device capable of sucking a yarn at a position downstream of the yarn storage device in terms of yarn travel, the suction device being fixedly provided; a yarn joining device located downstream of the yarn travel compared to the suction device, which performs joining of the yarn on the spinning device side and the yarn on the package side captured by the suction device after the yarn is broken; and a yarn acting member capable of changing the yarn path by moving between a standby position and a yarn disengaging position, the yarn storage device possesses: a yarn storage roller capable of winding a yarn around an outer periphery to store the yarn; and a yarn hooking member rotatably configured to apply tension to the yarn by hooking the yarn unwound from the yarn storage roller, the yarn acting member is capable of disengaging the yarn from the yarn hooking member by moving from the standby position to the yarn disengaging position, after the yarn is broken between the spinning device and the yarn storage device, in a state in which the yarn remains on the yarn storage roller and is connected between the yarn storage roller and the package, the yarn is disengaged from the yarn hooking member by rotating the yarn storage roller while moving the yarn acting member to the yarn disengaging position, during the rotation of the yarn storage roller and the yarn acting member being located at the yarn disengaging position, the suction device is in a suction state.

2. The spinning machine according to claim 1, wherein in a state in which the yarn is broken between the spinning device and the yarn storage device and also broken between the yarn storage roller and the package, and in a state in which the yarn remains on the yarn storage roller, the yarn is disengaged from the yarn hooking member by rotating the yarn storage roller while moving the yarn acting member to the yarn disengaging position, during the rotation of the yarn storage roller and the yarn acting member being located at the yarn disengaging position, the yarn remaining on the yarn storage roller is removed by the suction device by making the suction device a suction state.

3. The spinning machine according to claim 1, wherein a plurality of spinning units are provided, each of the spinning units possesses the spinning device, the yarn storage device, and the winding device, the yarn acting member and a drive portion that drives the yarn acting member are provided in each of the spinning units.

4. The spinning machine according to claim 2, wherein a plurality of spinning units are provided, each of the spinning units possesses the spinning device, the yarn storage device, and the winding device, The yarn acting member and a driving section for driving the yarn acting member are provided in each of the spinning units.

5. The spinning machine according to claim 1, wherein In the case where the spinning device performs take-up spinning, the yarn acting member moves to a position for discarding the yarn wound on the yarn reservoir roller.

6. The spinning machine according to claim 2, wherein In the case where the spinning device performs take-up spinning, the yarn acting member moves to a position for discarding the yarn wound on the yarn reservoir roller.

7. The spinning machine according to claim 3, wherein In the case where the spinning device performs take-up spinning, the yarn acting member moves to a position for discarding the yarn wound on the yarn reservoir roller.

8. The spinning machine according to claim 4, wherein In the case where the spinning device performs take-up spinning, the yarn acting member moves to a position for discarding the yarn wound on the yarn reservoir roller.

9. The spinning machine according to any one of claims 1 to 8, wherein After the time point at which the yarn is entirely unwound from the yarn reservoir roller and the yarn is attracted by the attraction device, the yarn acting member returns to the position at which the change of the yarn path is released.

10. The spinning machine according to any one of claims 1 to 8, wherein After the spinning is interrupted, the yarn acting member moves for changing the yarn path after the rotational speed of the yarn reservoir roller is reduced.

11. The spinning machine according to claim 9, wherein After the spinning is interrupted, the yarn acting member moves for changing the yarn path after the rotational speed of the yarn reservoir roller is reduced.

12. The spinning machine according to any one of claims 1 to 8, 11, wherein A sensor that detects the amount of the yarn reservoir of the yarn reservoir roller is provided.

13. The spinning machine according to claim 9, wherein A sensor that detects the amount of the yarn reservoir of the yarn reservoir roller is provided.

14. The spinning machine according to claim 10, wherein A sensor that detects the amount of the yarn reservoir of the yarn reservoir roller is provided.

15. The spinning machine according to any one of claims 1 to 8, 11, 13, 14, wherein A yarn moving device that actively moves the yarn toward the attraction device is provided.

16. The spinning machine according to claim 9, wherein A yarn moving device that actively moves the yarn toward the attraction device is provided.

17. The spinning machine according to claim 10, wherein A yarn moving device that actively moves the yarn toward the attraction device is provided.

18. The spinning machine according to claim 12, wherein A yarn moving device that actively moves the yarn toward the attraction device is provided.

19. The spinning machine according to any one of claims 1 to 8, 11, 13, 14, 16 to 18, wherein A plurality of spinning units are provided, Each of the spinning units is provided with the spinning device and the winding device, The winding device of each of the spinning units is provided with a traversing device that traverses the yarn wound by the winding device, In the event of a yarn breakage between the spinning device and the winding device in the spinning unit, the winding device side yarn is wound on a package in a state in which the traversing amplitude of the traversing of the yarn by the traversing device is narrower than the traversing amplitude before the yarn breakage.

20. The spinning machine according to claim 9, wherein a plurality of spinning units are provided, Each of the spinning units is provided with the spinning device and the winding device, The winding device of each of the spinning units is provided with a traversing device that traverses the yarn wound by the winding device, In the event of a yarn breakage between the spinning device and the winding device in the spinning unit, the winding device side yarn is wound on a package in a state in which the traversing amplitude of the traversing of the yarn by the traversing device is narrower than the traversing amplitude before the yarn breakage.

21. The spinning machine according to claim 10, wherein a plurality of spinning units are provided, Each of the spinning units is provided with the spinning device and the winding device, The winding device of each of the spinning units is provided with a traversing device that traverses the yarn wound by the winding device, In the event of a yarn breakage between the spinning device and the winding device in the spinning unit, the winding device side yarn is wound on a package in a state in which the traversing amplitude of the traversing of the yarn by the traversing device is narrower than the traversing amplitude before the yarn breakage.

22. The spinning machine according to claim 12, wherein a plurality of spinning units are provided, Each of the spinning units is provided with the spinning device and the winding device, The winding device of each of the spinning units is provided with a traversing device that traverses the yarn wound by the winding device, In the event of a yarn breakage between the spinning device and the winding device in the spinning unit, the winding device side yarn is wound on a package in a state in which the traversing amplitude of the traversing of the yarn by the traversing device is narrower than the traversing amplitude before the yarn breakage.

23. The spinning machine according to claim 15, wherein a plurality of spinning units are provided, Each of the spinning units is provided with the spinning device and the winding device, The winding device of each of the spinning units is provided with a traversing device that traverses the yarn wound by the winding device, In the event of a yarn breakage between the spinning device and the winding device in the spinning unit, the winding device side yarn is wound on a package in a state in which the traversing amplitude of the traversing of the yarn by the traversing device is narrower than the traversing amplitude before the yarn breakage.

24. The spinning machine according to any one of claims 1 to 8, 11, 13, 14, 16 to 18, 20 to 23, wherein In the event of a yarn breakage between the spinning device and the yarn reservoir roller, the yarn is continuous between the yarn reservoir roller and the package in a state in which the yarn is attracted by the attraction device. The yarn that is attracted by the attraction device from the yarn reservoir roller is continuous between the attraction device and the package in a state in which the winding of the yarn by the winding device is completed.

25. The spinning machine according to claim 9, wherein in a case where the yarn is broken between the spinning device and the yarn reservoir roller, the yarn is continuous between the yarn reservoir roller and the package, the yarn that is attracted by the attraction device after the withdrawal from the yarn reservoir roller is ended is in a state of being continuous between the attraction device and the package.

26. The spinning machine according to claim 10, wherein in a case where the yarn is broken between the spinning device and the yarn reservoir roller, the yarn is continuous between the yarn reservoir roller and the package, the yarn that is attracted by the attraction device after the withdrawal from the yarn reservoir roller is ended is in a state of being continuous between the attraction device and the package.

27. The spinning machine according to claim 12, wherein in a case where the yarn is broken between the spinning device and the yarn reservoir roller, the yarn is continuous between the yarn reservoir roller and the package, the yarn that is attracted by the attraction device after the withdrawal from the yarn reservoir roller is ended is in a state of being continuous between the attraction device and the package.

28. The spinning machine according to claim 15, wherein in a case where the yarn is broken between the spinning device and the yarn reservoir roller, the yarn is continuous between the yarn reservoir roller and the package, the yarn that is attracted by the attraction device after the withdrawal from the yarn reservoir roller is ended is in a state of being continuous between the attraction device and the package.

29. The spinning machine according to claim 19, wherein in a case where the yarn is broken between the spinning device and the yarn reservoir roller, the yarn is continuous between the yarn reservoir roller and the package, the yarn that is attracted by the attraction device after the withdrawal from the yarn reservoir roller is ended is in a state of being continuous between the attraction device and the package.

30. A spinning machine characterized in that, provided with: a spinning device that can generate and supply a yarn by spinning a fiber bundle; a winding device that winds the yarn supplied from the spinning device to form a package; a yarn reservoir device that is arranged in a yarn path formed between the spinning device and the winding device; an attraction device that can attract a yarn at a position on a yarn travel downstream side from the yarn reservoir device, the attraction device being fixedly provided; a yarn joining device that is located on a yarn travel downstream side from the attraction device, and that performs joining of the yarn on the spinning device side and the yarn on the package side captured by the attraction device after the yarn is broken; and a yarn acting member that changes a yarn path, the yarn reservoir device is provided with: a yarn reservoir roller that can wind a yarn around an outer periphery to store the yarn; and a yarn hooking member that is rotatably configured to apply tension to the yarn by hooking the yarn withdrawn from the yarn reservoir roller, The yarn acting member changes the yarn path of the yarn withdrawn from the yarn storage roller in association with the interrupted action of spinning, in a state where the yarn remains on the yarn storage roller and the yarn is connected between the yarn storage roller and the package.

31. The spinning machine according to claim 30, wherein a plurality of spinning units are provided, each of the spinning units is provided with the spinning device, the yarn storage device, and the winding device, the yarn acting member and a driving section that drives the yarn acting member are provided in each of the spinning units.

32. The spinning machine according to claim 30, wherein in a case where the spinning device performs yarn drawing spinning, the yarn acting member moves to a position for discarding the yarn wound on the yarn storage roller.

33. The spinning machine according to claim 31, wherein in a case where the spinning device performs yarn drawing spinning, the yarn acting member moves to a position for discarding the yarn wound on the yarn storage roller.

34. The spinning machine according to claim 30, wherein after the time when the yarn is completely withdrawn from the yarn storage roller and the yarn is attracted by the attracting device, the yarn acting member returns to a position where the yarn path change is released.

35. The spinning machine according to claim 31, wherein after the time when the yarn is completely withdrawn from the yarn storage roller and the yarn is attracted by the attracting device, the yarn acting member returns to a position where the yarn path change is released.

36. The spinning machine according to claim 32, wherein after the time when the yarn is completely withdrawn from the yarn storage roller and the yarn is attracted by the attracting device, the yarn acting member returns to a position where the yarn path change is released.

37. The spinning machine according to claim 33, wherein after the time when the yarn is completely withdrawn from the yarn storage roller and the yarn is attracted by the attracting device, the yarn acting member returns to a position where the yarn path change is released.

38. The spinning machine according to any one of claims 30 to 37, wherein after the spinning is interrupted, the yarn acting member moves for changing the yarn path after the rotational speed of the yarn storage roller is decelerated.

39. The spinning machine according to any one of claims 30 to 37, wherein a sensor that detects the yarn storage amount of the yarn storage roller is provided.

40. The spinning machine according to claim 38, wherein a sensor that detects the yarn storage amount of the yarn storage roller is provided.

41. The spinning machine according to any one of claims 30 to 37, 40, wherein a yarn moving device that actively moves the yarn toward the attracting device is provided.

42. The spinning machine according to claim 38, wherein a yarn moving device that actively moves the yarn toward the attracting device is provided.

43. The spinning machine according to claim 39, wherein yarn moving device that moves the yarn actively toward the suction device.

44. The spinning machine according to any one of claims 30 to 37, 40, 42, 43, wherein a plurality of spinning units are provided, each spinning unit is provided with the spinning device and the winding device, the winding device of each spinning unit is provided with a traversing device that traverses the yarn wound by the winding device, in the event of a yarn breakage between the spinning device and the winding device in the spinning unit, the winding device side yarn is wound on a package in a state where the traversing amplitude of the yarn traversed by the traversing device is narrower than the traversing amplitude before the yarn breakage.

45. The spinning machine according to claim 38, wherein a plurality of spinning units are provided, each spinning unit is provided with the spinning device and the winding device, the winding device of each spinning unit is provided with a traversing device that traverses the yarn wound by the winding device, in the event of a yarn breakage between the spinning device and the winding device in the spinning unit, the winding device side yarn is wound on a package in a state where the traversing amplitude of the yarn traversed by the traversing device is narrower than the traversing amplitude before the yarn breakage.

46. The spinning machine according to claim 39, wherein a plurality of spinning units are provided, each spinning unit is provided with the spinning device and the winding device, the winding device of each spinning unit is provided with a traversing device that traverses the yarn wound by the winding device, in the event of a yarn breakage between the spinning device and the winding device in the spinning unit, the winding device side yarn is wound on a package in a state where the traversing amplitude of the yarn traversed by the traversing device is narrower than the traversing amplitude before the yarn breakage.

47. The spinning machine according to claim 41, wherein a plurality of spinning units are provided, each spinning unit is provided with the spinning device and the winding device, the winding device of each spinning unit is provided with a traversing device that traverses the yarn wound by the winding device, in the event of a yarn breakage between the spinning device and the winding device in the spinning unit, the winding device side yarn is wound on a package in a state where the traversing amplitude of the yarn traversed by the traversing device is narrower than the traversing amplitude before the yarn breakage.

48. The spinning machine according to any one of claims 30 to 37, 40, 42, 43, 45 to 47, wherein in the event of a yarn breakage between the spinning device and the yarn reservoir roller, the yarn is continuous between the yarn reservoir roller and the package in a state where the yarn that is wound off from the yarn reservoir roller and is attracted by the suction device is continuous between the suction device and the package.

49. The spinning machine according to claim 38, wherein in the event of a yarn breakage between the spinning device and the yarn reservoir roller, the yarn is continuous between the yarn reservoir roller and the package in a state where The yarn that has been drawn from the yarn storage roller and attracted by the suction device is in a state of continuity between the suction device and the package.

50. The spinning machine according to claim 39, wherein in the case where the yarn is broken between the spinning device and the yarn storage roller, the yarn is in a state of continuity between the yarn storage roller and the package, the yarn that has been drawn from the yarn storage roller and attracted by the suction device is in a state of continuity between the suction device and the package.

51. The spinning machine according to claim 41, wherein in the case where the yarn is broken between the spinning device and the yarn storage roller, the yarn is in a state of continuity between the yarn storage roller and the package, the yarn that has been drawn from the yarn storage roller and attracted by the suction device is in a state of continuity between the suction device and the package.

52. The spinning machine according to claim 44, wherein in the case where the yarn is broken between the spinning device and the yarn storage roller, the yarn is in a state of continuity between the yarn storage roller and the package, the yarn that has been drawn from the yarn storage roller and attracted by the suction device is in a state of continuity between the suction device and the package.

53. A spinning machine characterized in that, provided with: a spinning device that generates and supplies a yarn by spinning a fiber bundle; a winding device that winds the yarn supplied from the spinning device to form a package; a yarn storage roller that is disposed in a yarn path formed between the spinning device and the winding device; a first driving section that rotationally drives the yarn storage roller; a yarn hooking member that contacts the yarn drawn from the yarn storage roller to apply tension to the yarn; a suction device that is capable of attracting the yarn at a position on a yarn travel downstream side from the yarn storage roller, the suction device being fixedly provided; and a yarn joining device that is located on a yarn travel downstream side from the suction device, and that joins the yarn on the spinning device side and the yarn on the package side captured by the suction device after the yarn is broken, in association with a yarn breakage operation, in a state where the yarn remains on the yarn storage roller and the yarn is continuous between the yarn storage roller and the package, at least one of the following operations is performed: stopping rotation of the yarn hooking member; stopping rotation of the yarn storage roller by stopping driving of the first driving section, rotating the yarn hooking member in a direction in which the yarn is drawn from the yarn storage roller; deforming the yarn hooking member into an inactive shape by shortening the length of the yarn hooking member or bending the yarn hooking member.

54. The spinning machine according to claim 53, wherein during at least one of the period when the yarn is broken between the spinning device and the yarn reservoir roller and the period when the yarn is broken between the yarn reservoir roller and the package, and when the yarn is removed from the yarn reservoir roller by the suction device in the state where the suction device is in the suction state, the action is: stopping the rotation of the yarn hooking member; stopping the rotation of the yarn reservoir roller and rotating the yarn hooking member in the direction in which the yarn is withdrawn from the yarn reservoir roller; changing the yarn hooking member into the inoperative shape.

55. The spinning machine according to claim 53, wherein a second driving unit that rotates and drives the yarn hooking member is provided.

56. The spinning machine according to claim 54, wherein a second driving unit that rotates and drives the yarn hooking member is provided.

57. The spinning machine according to claim 53, wherein a sensor that detects the amount of yarn stored in the yarn reservoir roller is provided.

58. The spinning machine according to claim 54, wherein a sensor that detects the amount of yarn stored in the yarn reservoir roller is provided.

59. The spinning machine according to claim 55, wherein a sensor that detects the amount of yarn stored in the yarn reservoir roller is provided.

60. The spinning machine according to claim 56, wherein a sensor that detects the amount of yarn stored in the yarn reservoir roller is provided.

61. The spinning machine according to any one of claims 53 to 60, wherein a yarn moving device that actively moves the yarn toward the suction device is provided.

62. The spinning machine according to any one of claims 53 to 60, wherein a plurality of spinning units are provided, each of the spinning units is provided with the spinning device and the winding device, the winding device of each of the spinning units is provided with a traversing device that traverses the yarn wound by the winding device, in the case where the yarn is broken between the spinning device and the winding device in the spinning unit, the winding device side yarn is wound on the package in the state where the traversing device traverses the yarn at a narrower amplitude than the amplitude before the yarn is broken.

63. The spinning machine according to claim 61, wherein a plurality of spinning units are provided, each of the spinning units is provided with the spinning device and the winding device, the winding device of each of the spinning units is provided with a traversing device that traverses the yarn wound by the winding device, in the case where the yarn is broken between the spinning device and the winding device in the spinning unit, the winding device side yarn is wound on the package in the state where the traversing device traverses the yarn at a narrower amplitude than the amplitude before the yarn is broken.

64. The spinning machine according to any one of claims 53 to 60, 63, wherein in the case where the yarn is broken between the spinning device and the yarn reservoir roller, the yarn is continuous between the yarn reservoir roller and the package, The yarn that is wound off from the yarn storage roller and attracted by the suction device is in a continuous state between the suction device and the package.

65. Spinning machine according to claim 61, characterized in that In the event of a yarn break between the spinning device and the yarn storage roller, the yarn is in a continuous state between the yarn storage roller and the package, The yarn that is wound off from the yarn storage roller and attracted by the suction device is in a continuous state between the suction device and the package.

66. Spinning machine according to claim 62, characterized in that In the event of a yarn break between the spinning device and the yarn storage roller, the yarn is in a continuous state between the yarn storage roller and the package, The yarn that is wound off from the yarn storage roller and attracted by the suction device is in a continuous state between the suction device and the package.

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