Air-jet spinning machine

Abstract

The present invention provides an air spinning machine provided with a draft device (21), an air spinning device (23), a yarn storage device (25), a yarn intervention device (27), a suction device (29), and a winding device (31). The air spinning device (23) generates a spun yarn (33) by twisting a sliver (35), i.e., a fiber bundle (37), which has been drafted by the draft device (21), with a twist-back air flow. The yarn storage device (25) temporarily stores the spun yarn. The yarn intervention device (27) intervenes in the spun yarn. The suction device (29) is configured to be able to suck the spun yarn. The winding device (31) winds the spun yarn to form a package (93). The draft device, the air spinning device, the yarn storage device, the yarn intervention device, the suction device, and the winding device are arranged in this order from a high position to a low position. The yarn intervention device (27) is a waxing device (65) and a yarn travel sensor (67).

Description

Technical Field

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

[0002] There has long been a known type of air-jet spinning machine that includes a splicing device for splicing yarn in the event of yarn breakage. Patent Document 1 discloses such a spinning machine.

[0003] The spinning machine disclosed in Japanese Utility Model Application Publication No. 05-064172 includes a spinning nozzle, a splicing device, and a take-up device. The splicing device is located downstream of the spinning nozzle in the yarn travel direction. The splicing device includes a yarn end catcher on the package side, a yarn end catcher on the spinning unit side, and splicing components. The suction nozzle of the package side yarn end catcher has a yarn end inlet. The yarn end inlet is capable of drawing in yarn from the package (take-up device) side.

[0004] Japanese Utility Model Application Publication No. 05-064172 discloses a spinning machine equipped with a relaxation tube. In the event of a yarn defect, the relaxation tube draws in and holds the yarn on the package side until splicing begins. In the event of a yarn defect, the yarn on the package side stops traveling before being wound into the package. As a result, the yarn on the package side is drawn in by the suction airflow of the relaxation tube and becomes positioned between the relaxation tube and the package.

[0005] The suction nozzle captures the yarn on the packaged side in this state and guides it toward the splicing component. The splicing component then connects the yarn on the packaged side with the yarn on the spinning unit side, which is guided by the yarn-end capture device on the spinning unit side.

[0006] In the configuration disclosed in Japanese Utility Model Application Publication No. 05-064172, two rollers that clamp and feed the yarn are arranged downstream of the spinning nozzle. Hereinafter, these two rollers will sometimes be referred to as feed rollers. The suction port of the relaxation tube is located downstream of the feed rollers and is relatively close to the feed rollers. Therefore, for example, if yarn breakage occurs at the spinning nozzle, the yarn end will immediately pass through the suction port of the relaxation tube after leaving the feed rollers.

[0007] Thus, in the layout described in Japanese Utility Model Publication No. 05-064172, there is essentially no opportunity for the suction airflow of the relaxation tube to act on the yarn on the package side and suck it in, making it difficult to reliably capture the yarn into the relaxation tube. Summary of the Invention

[0008] The purpose of this invention is to provide a spinning machine that can reliably capture the yarn on the take-up side when yarn breakage occurs.

[0009] According to the present invention, an air-jet spinning machine with the following configuration is provided. That is, the air-jet spinning machine includes a drafting device, a spinning device, a yarn storage device, a yarn intervention device, a suction device, and a take-up device. The drafting device generates a fiber bundle. The spinning device is positioned lower than the yarn intervention device, and generates yarn by twisting the fiber bundle generated by the drafting device using a twisting airflow. The yarn storage device is positioned lower than the spinning device and temporarily stores the yarn generated by the spinning device. The yarn intervention device is positioned lower than the yarn storage device and intervenes in the yarn. The suction device is positioned lower than the yarn intervention device and higher than the take-up device, and the suction device has a suction port that opens into a yarn passage between the yarn intervention device and the take-up device, leading towards the yarn. Thus, it is configured to attract the yarn. The take-up device is positioned lower than the suction device and takes up the yarn to form a package. The aforementioned yarn intervention device is a yarn processing device and / or a yarn detection device.

[0010] Therefore, when yarn breakage occurs between the spinning device and the take-up device, the yarn on the take-up device side can be reliably captured by the suction device. Furthermore, since a yarn intervention device is arranged in the space between the yarn storage device and the suction device, this space does not become a dead zone in the air-jet spinning machine.

[0011] In the aforementioned air-jet spinning machine, the following configuration is preferred: The yarn storage device includes a yarn storage roller that stores the yarn by winding it around its outer circumference. The suction device is disposed relative to the yarn storage device at a yarn capture interval having a predetermined interval in the vertical direction. The yarn capture interval is such that it allows the yarn unwound from the yarn storage roller after a yarn breakage occurs between the spinning device and the take-up device to pass through, while ensuring the length of the captured yarn is maintained. The yarn intervention device is disposed in the space between the yarn storage device and the suction device, corresponding to the yarn capture interval.

[0012] Therefore, the distance between the yarn storage device and the suction device can be adequately ensured. Consequently, the length of the suction flow acting on the yarn by the suction device for capture can be substantially increased. As a result, the yarn can be easily captured in the suction device. Moreover, by arranging the yarn intervention device in a space comparable to the distance ensured for this purpose, space can be used efficiently.

[0013] In the above-mentioned air-jet spinning machine, the interval between the yarn storage device and the suction device is preferably 50 mm to 150 mm in the direction of yarn travel.

[0014] Therefore, while maintaining the compactness of the structure, it is possible to reliably capture the yarn with the attraction device, and to ensure space for the yarn intervention device.

[0015] Preferably, in the above-mentioned air-jet spinning machine, the yarn intervention device is provided as the yarn treatment device and has a waxing device capable of maintaining the wax applied to the yarn.

[0016] Therefore, a space-efficient layout can be achieved for the waxing device. Since the waxing device is a length-based unit, the suction device can be configured separately from the yarn storage device, and the yarn can be easily captured by the suction device.

[0017] Preferably, in the above-mentioned air-jet spinning machine, the yarn intervention device is equipped with a sensor that detects the presence or absence of the yarn as the yarn detection device.

[0018] Therefore, a space-efficient layout can be achieved for the sensor. Since the sensor that detects the presence or absence of yarn is a device of a certain length, the attraction device can be configured separately from the yarn storage device, and the yarn can be easily captured by the attraction device.

[0019] In the aforementioned air-jet spinning machine, the following configuration is preferred: The suction device includes a suction port that opens into the yarn passage between the yarn intervention device and the take-up device, facing the yarn. The suction port is fixedly positioned along the direction of the yarn passage. Furthermore, the suction port is formed to be elongated along the direction of the yarn passage.

[0020] Therefore, the yarn can be easily captured by the suction port on the side of the winding device.

[0021] The aforementioned air-jet spinning machine preferably has a changing section capable of changing the attraction state of the aforementioned attraction device.

[0022] Therefore, for example, during normal take-up when no yarn breakage occurs, the suction device can be prevented from acting on the yarn. Consequently, energy savings can be achieved in air-jet spinning machines.

[0023] The air-jet spinning machine described above preferably has the following configuration: It includes a splicing device and a yarn-catching and guiding device. When yarn breakage occurs between the spinning device and the take-up device, the splicing device splices the yarn from the spinning device side to the take-up device side. The yarn-catching and guiding device catches the yarn from the spinning device side and guides it towards the splicing device. When splicing, the splicing device is arranged vertically between the suction device and the take-up device.

[0024] Therefore, during splicing, the yarn on the take-up device side is not subject to physical influences caused by yarn interference devices, etc., thus enabling smooth splicing.

[0025] The air-jet spinning machine described above preferably has the following configuration: It comprises multiple spinning units. Each spinning unit includes the aforementioned spinning device, yarn storage device, yarn intervention device, suction device, and take-up device. Each spinning unit also includes a splicing device and a yarn capturing and guiding device. The splicing device is arranged vertically between the suction device and the take-up device, splicing the yarn from the spinning device side to the yarn from the take-up device side between the spinning device and the take-up device. The yarn capturing and guiding device captures the yarn from the spinning device side and guides it toward the splicing device.

[0026] Therefore, if a yarn breakage occurs between the spinning device and the take-up device in a spinning unit, the splicing operation can be completed in that spinning unit and spinning can be restarted.

[0027] The air-jet spinning machine described above preferably has the following configuration: It includes multiple drafting units. Each drafting unit includes multiple drive rollers. All the drive rollers constituting the drafting units are driven independently relative to the drive rollers of the other drafting units.

[0028] Therefore, the driving of each drive roller of the drafting device can be controlled independently and flexibly, unlike other drafting devices. Attached Figure Description

[0029] Figure 1 This is a front view showing the overall configuration of an air-jet spinning machine according to one embodiment of the present invention.

[0030] Figure 2 It means Figure 1 A side view of the spinning unit of an air-jet spinning machine.

[0031] Figure 3 This is the front view showing the suction port of the suction device.

[0032] Figure 4 This is a side view showing the state of the spinning unit where the spinning process has broken down and the splicing trolley has moved into the spinning unit.

[0033] Figure 5 This is a side view showing the situation where the spinning yarn is guided to the splicing device of the splicing trolley. Detailed Implementation

[0034] An air-jet spinning machine 1 according to one embodiment of the present invention will be described with reference to the accompanying drawings.

[0035] like Figure 1 As shown, the air-jet spinning machine 1 includes a blower box 3, a power box 5, multiple spinning units 7, and a splicing trolley 9. The multiple spinning units 7 are arranged in a predetermined direction.

[0036] The blower 11, which functions as a negative pressure source, is installed inside the blower box 3.

[0037] The power unit 5 is equipped with a drive source (not shown), a central control unit 13, a display unit 15, and an operation unit 17. The drive source provided in the power unit 5 includes an electric motor commonly used in the multiple spinning units 7.

[0038] The central control unit 13 centrally manages and controls all parts of the air-jet spinning machine 1. The central control unit 13 communicates with each spinning unit 7 via signal lines (not shown in the diagram). Figure 2 The unit control unit 19 is connected in this way. In this embodiment, each spinning unit 7 has a unit control unit 19, but a predetermined number (e.g., two or four) of spinning units 7 may share a single unit control unit 19.

[0039] The display unit 15 can display information related to the settings for the spinning units 7 and / or the status of each spinning unit 7. The operator operates the operation unit 17 to set the air-jet spinning machine 1 and / or select the information displayed on the display unit 15. The display unit 15 and the operation unit 17 can also be configured as a touch panel display.

[0040] As in Figure 2 As shown, each spinning unit 7 mainly comprises, in sequence from upstream to downstream, a drafting device 21, an air-jet spinning device (spinning device) 23, a yarn storage device 25, a yarn intervention device 27, an attraction device 29, and a take-up device 31. Here, "upstream" and "downstream," unless otherwise specified, refer to the upstream and downstream directions of the yarn (fiber bundle) 35, fiber bundle 37 during the take-up of the spinning (yarn) 33, and the direction of travel of the spinning 33.

[0041] The drafting device 21 is disposed at the upper part of the spinning unit 7 (air-jet spinning machine 1). The drafting device 21 has multiple drafting rollers. Among the multiple drafting rollers, two drafting rollers form a drafting roller pair. In this embodiment, the drafting device 21 has multiple drafting roller pairs.

[0042] Specifically, the drafting device 21 has four drafting roll pairs. The four drafting roll pairs are arranged sequentially from upstream to downstream as the rear roll pair 41, the third roll pair 43, the intermediate roll pair 45, and the front roll pair 47. A belt 49 is provided on each drafting roll of the intermediate roll pair 45.

[0043] Each of the four drafting roll pairs has a drive roll and a driven roll that are opposite each other. The drive roll and the driven roll are equivalent to drafting rolls. For each of the four drafting roll pairs, a drive source such as a motor (not shown) is independently provided for each drive roll. Each drive roll is driven by the drive source and rotates about its own axis. The driven roll of each drafting roll pair is configured to rotate about its own axis via a bearing (not shown).

[0044] Each drafting roll pair's drive roller is driven to rotate independently relative to the drive rollers of other drafting roll pairs. Furthermore, all four drive rollers are driven to rotate independently relative to the drive rollers in the other drafting units 21. Thus, the drafting unit 21 is configured as a single-spindle driven drafting unit. However, it is also possible that at least one of the drive rollers of the front roll pair 47 or the drive rollers of the intermediate roll pair 45 is driven simultaneously by a drive source commonly provided for multiple spinning units 7. Furthermore, in each spinning unit 7, the drive rollers of the rear roll pair 41 and the drive rollers of the third roll pair 43 can also be driven by a single motor.

[0045] The drafting device 21 conveys the yarn 35 supplied from the yarn box (not shown) between the drafting rollers of each drafting roller pair (between the drive roller and the driven roller), thereby stretching (drafting) it to a predetermined amount of fiber (or thickness) to generate a fiber bundle 37. The fiber bundle 37 generated by the drafting device 21 is supplied to the air-jet spinning device 23.

[0046] The air-jet spinning device 23 generates yarn 33 by twisting the fiber bundle 37 (drafted yarn 35) generated by the drafting device 21 by applying a twisting airflow to it. The air-jet spinning device 23 is disposed downstream of the drafting device 21 in the height direction of the air-jet spinning machine 1 (spinning unit 7).

[0047] The yarn storage device 25 temporarily stores the spun yarn 33 generated by the air-jet spinning device 23. The yarn storage device 25 is disposed approximately below and downstream of the air-jet spinning device 23. The yarn storage device 25 includes a yarn storage roller 53, an electric motor 55, a yarn hanging component 57, and a yarn guide 59.

[0048] The yarn accumulation roller 53 is driven to rotate by an electric motor 55. The yarn accumulation roller 53 temporarily accumulates the spun yarn 33 by winding it around its outer peripheral surface. By rotating at a predetermined speed with the spun yarn 33 wound on its outer peripheral surface, the yarn accumulation roller 53 can pull the spun yarn 33 out of the air-jet spinning device 23 at a predetermined speed.

[0049] The yarn-hanging component 57 is capable of hooking the spinning yarn 33. By rotating integrally with the yarn accumulation roller 53 while the spinning yarn 33 is hooked, the yarn-hanging component 57 guides the spinning yarn 33 to the outer peripheral surface of the yarn accumulation roller 53.

[0050] The yarn guide 59 is disposed slightly below the yarn accumulation roller 53 on its downstream side. The yarn guide 59 is configured to restrict the track of the spinning yarn 33, which is agitated by the rotating yarn hanging member 57, thereby stabilizing and guiding the yarn 33 in the yarn channel downstream (lower side) of the yarn guide 59.

[0051] The yarn storage device 25 can temporarily store the yarn 33 on the outer peripheral surface of the yarn storage roller 53, thus functioning as a buffer for the yarn 33. As a result, it is possible to eliminate undesirable conditions (e.g., slack in the yarn 33) caused by the inconsistency between the spinning speed and the take-up speed (the travel speed of the yarn 33 taken up by the package 93, described later) in the air-jet spinning device 23 due to some reason.

[0052] A yarn monitoring device 63 is provided between the air-jet spinning device 23 and the yarn storage device 25. The yarn 33 generated by the air-jet spinning device 23 passes through the yarn monitoring device 63 before being stored by the yarn storage device 25.

[0053] The yarn monitoring device 63 monitors the quality of the moving yarn 33 using a light sensor and detects yarn defects contained in the yarn 33. Yarn defects include, for example, abnormalities in the thickness of the yarn 33 and / or foreign objects contained in the yarn 33. When a yarn defect is detected, the yarn monitoring device 63 sends a yarn defect detection signal to the unit control unit 19. Alternatively, the yarn monitoring device 63 may use a sensor such as an electrostatic capacitive sensor to monitor the quality of the yarn 33 instead of a light sensor. Alternatively, or based on these examples, the yarn monitoring device 63 may be configured to measure the tension of the yarn 33 as a measure of its quality.

[0054] The unit control unit 19 is configured to cut the yarn 33 by stopping the drive of the air-jet spinning device 23 and / or the drafting device 21 when a yarn defect detection signal is received from the yarn monitoring device 63. That is, the air-jet spinning device 23 functions as a cutting unit that cuts the yarn 33 when a yarn defect is detected by the yarn monitoring device 63. Alternatively, the spinning unit 7 may also include a cutter for cutting the yarn 33.

[0055] The yarn intervention device 27 intervenes in the spinning 33 that has passed through the yarn storage device 25. The yarn intervention device 27 is disposed downstream of the yarn storage device 25. In this embodiment, the yarn intervention device 27 includes a waxing device 65 and a yarn travel sensor (yarn detection device) 67.

[0056] The waxing device 65 is capable of maintaining the wax applied to the spinning yarn 33. The waxing device 65 waxes the traveling spinning yarn 33 between the yarn storage device 25 and the take-up device 31. A yarn travel sensor 67 is provided near the waxing device 65.

[0057] The yarn travel sensor 67 detects whether the spinning 33 is in progress, or in other words, whether the spinning 33 is present, at a predetermined position in the yarn channel. In this embodiment, the yarn travel sensor 67 is disposed slightly below and downstream of the waxing device 65. The yarn travel sensor 67 is electrically connected to the unit control unit 19.

[0058] The suction device 29 is capable of attracting the spun yarn 33 after it has passed through the yarn intervention device 27. The suction device 29 is disposed downstream of the yarn intervention device 27. The suction device 29 is designed to attract the yarn 33 when a break occurs between the air-jet spinning device 23 and the take-up device 31. Figure 3 The spinning 69 on the take-up device 31 side, indicated by the dashed line, is activated. A typical reason for the breakage of the spinning 33 is the cutting of the spinning 33 due to a yarn defect detected by the yarn monitoring device 63 (interruption of airflow spinning). The timing for the suction device 29 to activate the spinning 69 is after the spinning 33 has broken and before the spinning 69 is taken up by the take-up device 31 into the rotating package 93.

[0059] Specifically, the suction device 29 attracts and captures the yarn 69 on the side of the take-up device 31 below the yarn storage device 25 (yarn guide 59).

[0060] The suction device 29 includes a suction tube 71. A suction port 73 is formed at the front end (the end along the long side) of the suction tube 71. The suction port 73 opens toward the yarn channel, which is the path through which the spinning 33 travels from the yarn intervention device 27 toward the take-up device 31. The suction port 73 is fixedly positioned along the direction of the yarn channel. That is, the suction port 73 is fixed so that it does not move along the direction of the yarn channel. However, for adjustment, a configuration that allows the suction port 73 to move along the direction of the yarn channel can also be adopted. The suction tube 71 is connected to a blower that functions as a negative pressure source via piping or the like. This allows a suction airflow to be generated within the suction port 73 (within the suction tube 71).

[0061] like Figure 3 As shown, the suction port 73 is formed relatively long along the direction of the yarn channel between the yarn intervention device 27 and the take-up device 31. In this embodiment, the suction port 73 is formed in a rectangular shape with the long side in the direction in which the yarn channel extends, i.e., the vertical direction. Thus, the suction device 29 is configured to easily attract the yarn 69 from the take-up device 31 side through the suction port 73.

[0062] The suction device 29 is configured relative to the yarn storage device 25, separated by a vertical yarn capture interval S1. The yarn capture interval S1 is the vertical distance between the yarn storage device 25 and the suction device 29. Strictly speaking, the yarn capture interval S1 is defined as the vertical distance between the lower end of the yarn guide 59 of the yarn storage device 25 and the upper end of the suction port 73 of the suction device 29. The yarn capture interval S1 has a predetermined vertical distance to ensure the length of the yarn 69 captured by the suction device 29 on the take-up device 31 side.

[0063] The aforementioned yarn intervention device 27 is disposed in the space 75 between the yarn storage device 25 and the suction device 29, which corresponds to the yarn capture interval S1.

[0064] The yarn capture interval S1 refers to the distance from the end of the yarn 69 to the opening of the suction device 29 after the yarn 33 has broken and the end of the yarn 69 has been substantially released from the constraint based on the yarn storage device 25. The longer this distance, the greater the chance that the suction port 73 will act on the yarn 69 to attract airflow, and therefore the easier it is to capture the yarn 69.

[0065] In this embodiment, the yarn capturing interval S1 has a spacing of 50 mm to 150 mm in the vertical direction. By setting the yarn capturing interval S1 to this size, it is possible to maintain the compactness of the air-jet spinning machine 1 while ensuring space for the yarn intervention device 27 between the yarn storage device 25 and the suction device 29. Therefore, not only can the yarn 69 be reliably captured, but space can also be used efficiently.

[0066] Furthermore, in this embodiment, the suction device 29 is positioned below the waxing device 65 of the yarn intervention device 27. Therefore, the suction device 29 can suction away wax residue and the like.

[0067] The suction device 29 is provided with a gate (changing part) 77 for changing the suction state of the suction device 29. The gate 77 is, for example, disposed between the suction port 73 and a portion downstream of the suction port 73 in the airflow direction. The gate 77 can be, for example, constructed by an opening and closing mechanism having a plate-shaped member. The gate 77 can be opened and closed by control of the unit control unit 19 or the central control device 13.

[0068] For example, if the spinning 33 does not break, there is no need to draw and capture the spinning 69 towards the suction port 73. In this case, by controlling it by closing the gate 77, energy saving of the air-jet spinning machine 1 can be achieved.

[0069] The take-up device 31 takes up the spun yarn 33 after it has passed through the yarn intervention device 27 to form a package 93. The take-up device 31 is located downstream of and below the air-jet spinning device 23. The take-up device 31 is also located downstream of and below the yarn intervention device 27 and the suction device 29.

[0070] In this embodiment, the take-up device 31 is a single-spindle driven take-up device. That is, the take-up device 31 of each spinning unit 7 is controlled independently of the take-up devices 31 of other spinning units 7 for start / stop of take-up. The take-up device 31 includes a cradle arm 81, a take-up roller 83, and a traverse yarn guide 85.

[0071] The rocker arm 81 is supported so as to be able to swing about the support shaft 87 and to support the bobbin 91 (and thus the package 93) for taking up the yarn 33 so as to be able to rotate. The take-up roller 83 rotates in contact with the outer circumferential surface of the bobbin 91 or the package 93, thereby driving the package 93 to rotate in the take-up direction. The take-up device 31 drives the take-up roller 83 by means of an electric motor (not shown) while reciprocating the traverse guide 85 via a drive mechanism (not shown). Thus, the take-up device 31 takes up the yarn 33 into the package 93 while traversing the yarn 33.

[0072] like Figure 1 As shown, the air-jet spinning machine 1 includes a track 101. The track 101 is arranged along the direction in which the plurality of spinning units 7 are arranged. The splicing carriage 9 is configured to travel on the track 101. Thus, the splicing carriage 9 can move relative to the plurality of spinning units 7.

[0073] The splicing carriage 9 travels to the spinning unit 7 where a yarn breakage or yarn severance has occurred, and performs splicing operations on the spinning unit 7. The splicing carriage 9 works in cooperation with the suction device 29 and other components of the spinning unit 7 to perform the splicing operation.

[0074] The splicing trolley 9 is equipped with traveling wheels 103, a splicing device 105, and a suction tube (yarn capturing and guiding device) 107. The splicing trolley 9 also has... Figure 4 The trolley control unit 111 is shown in the figure.

[0075] The suction tube 107 is capable of capturing the yarn 33 generated by the air-jet spinning device 23. Specifically, the suction tube 107 draws in and captures the yarn 33 delivered from the air-jet spinning device 23 by generating an suction airflow at its tip. By rotating the suction tube 107 while capturing the yarn 33, the yarn 33 is guided to a position where it can be introduced into the splicing device 105.

[0076] After the yarn 33 breaks, the splicing device 105 splices the yarn 69 on the side of the airflow spinning device 23 guided by the suction tube 107 with the yarn 69 on the side of the take-up device 31 captured by the suction device 29. In this embodiment, the splicing device 105 is a splicing device that twists the yarn ends together by twisting the airflow. The splicing device 105 is not limited to the above-described splicing device; for example, a mechanical knotter can also be used.

[0077] The trolley control unit 111 is configured as a known computer having a CPU, ROM, RAM, etc. (not shown). The trolley control unit 111 controls the jointing operation performed by the jointing trolley 9 by controlling the operation of each component of the jointing trolley 9.

[0078] Next, in Figure 2 Taking the case where the yarn monitoring device 63 detects a yarn defect under the condition of being in a state ...

[0079] First, the unit control unit 19 stops the air-jet spinning device 23 and / or the drafting device 21 based on the yarn defect detection signal input from the yarn monitoring device 63. At this time, the unit control unit 19 also stops the take-up device 31.

[0080] By stopping the airflow spinning device 23 and / or the drafting device 21, the yarn 33 is cut off. This results in the yarn 33 being disconnected. After the take-up device 31 has completely stopped, the unit control unit 19 restarts the take-up device 31. As a result, the yarn 69 on the take-up device 31 side, including the yarn remaining in the yarn storage device 25, is taken up by the take-up device 31 into the package 93. The take-up speed at this time is lower than the normal take-up speed to facilitate the capture of the yarn 69 by the suction device 29.

[0081] Driven by the take-up device 31, the yarn 69 is pulled out of the yarn storage device 25, and as... Figure 4 The accumulated amount gradually decreases as shown. A sensor (not shown) for detecting the accumulated amount of yarn 69 is provided in the yarn accumulation device 25. The unit control unit 19 monitors the detection signal of this sensor. When the timing is slightly before the yarn 69 leaves the yarn accumulation device 25 (for example, when the sensor detects that the accumulated amount of yarn 69 has fallen below a predetermined value), the unit control unit 19 opens the closed gate 77, causing the suction device 29 to begin suction. Then, at approximately the same timing as when the end of the yarn 69 leaves the yarn accumulation roller 53 and passes through the yarn guide 59, the unit control unit 19 stops the take-up device 31 again. As a result, the suction port 73 can draw in and capture the yarn 69.

[0082] At an appropriate time after the yarn monitoring device 63 detects a yarn defect, the unit control unit 19 sends a splicing request signal to the trolley control unit 111. Upon receiving the splicing request signal, the trolley control unit 111 causes the splicing trolley 9 to stop after traveling to the target spinning unit 7.

[0083] At a predetermined time after the spinning 33 is disconnected, the aforementioned suction device 29 captures the spun yarn 69. The suction port 73 of the suction tube 71 is configured to be in a suitable position relative to the splicing device 105 when the splicing carriage 9 is stopped at the working position of the spinning unit 7 equipped with the suction device 29. Therefore, when the splicing carriage 9 arrives, the spun yarn 69 held by the suction device 29 on the package 93 side is guided to the splicing device 105 provided by the splicing carriage 9.

[0084] After stopping the connector carriage 9, the carriage control unit 111 controls the connector carriage 9 to direct the suction pipe 107 toward a direction that allows it to... Figure 5 As shown by the dotted line, the position of the yarn captured on the side of the airflow spinning device 23 is moved. Almost simultaneously, the unit control unit 19 restarts the drive of the airflow spinning device 23 and / or the drafting device 21. The trolley control unit 111 causes the suction tube 107 to move the captured yarn on the side of the airflow spinning device 23 as shown by the dotted line. Figure 5 As shown by the solid line, it is guided to the connector device 105 below.

[0085] In this state, the unit control unit 19 activates the splicing device 105 to splice the yarn 69 from the take-up device 31 side, which is attracted by the suction device 29, with the yarn from the air-jet spinning device 23 side. During this splicing, excess yarn is cut off and discarded by the suction device 29 or the suction tube 107. Yarn is also continuously supplied from the air-jet spinning device 23 during the splicing, but this yarn is stored by the yarn storage device 25.

[0086] Almost simultaneously with the completion of the splicing, the winding device 31 restarts winding the package 93. The gate 77 closes at an appropriate time after the splicing operation is completed. Thus, the spinning unit 7 returns to... Figure 2 The usual state.

[0087] In addition, when the air-jet spinning device 23 and / or the drafting device 21 are stopped, the unit control unit 19 may not completely stop the take-up device 31, but instead control the take-up device 31 to reduce the take-up speed of the package 93 and cause the suction port 73 to attract the yarn end of the spinning 69.

[0088] As described above, although a yarn intervention device 27 is arranged on the yarn channel of spinning 33, essentially only a splicing device 105 is arranged between the suction device 29 and the take-up device 31. In other words, in the case of... Figure 5When splicing is performed in this way, there are no unnecessary devices such as the yarn interference device 27 below the suction device 29 and above the splicing device 105. Therefore, the movement of the spliced ​​yarn is not affected, for example, by the constraint of the waxing device 65 on the yarn, thus the splicing of the splicing device 105 can be performed smoothly.

[0089] As described above, the air-jet spinning machine 1 of this embodiment includes a drafting device 21, an air-jet spinning device 23, a yarn storage device 25, a yarn intervention device 27, a suction device 29, and a take-up device 31. The drafting device 21 drafts the yarn 35. The air-jet spinning device 23 twists the yarn 35 (i.e., fiber bundle 37) drafted by the drafting device 21 using a twisting airflow to generate yarn 33. The yarn storage device 25 is positioned lower than the air-jet spinning device 23 and temporarily stores the yarn 33 generated by the air-jet spinning device 23. The yarn intervention device 27 is positioned lower than the yarn storage device 25 and intervenes in the yarn 33. The suction device 29 is positioned lower than the yarn intervention device 27 and is configured to attract the yarn 33. The take-up device 31 is positioned lower than the suction device 29 and takes the yarn 33 to form a package 93. The yarn intervention device 27 includes a waxing device 65 and a yarn travel sensor 67.

[0090] Therefore, when the spinning 33 breaks between the air-jet spinning device 23 and the take-up device 31, the spinning 69 on the take-up device 31 side can be reliably captured by the suction device 29. Furthermore, since the yarn interference device 27 is arranged in the space 75 between the yarn storage device 25 and the suction device 29, this space 75 will not become a dead zone space in the air-jet spinning machine 1.

[0091] In the air-jet spinning machine 1 of this embodiment, the yarn storage device 25 has a yarn storage roller 53 that stores yarn 33 by winding it around the outer peripheral surface. The suction device 29 is configured relative to the yarn storage device 25 at a yarn capture interval S1 with a predetermined interval in the vertical direction. The yarn capture interval S1 is such that it allows yarn 69 unwound from the yarn storage roller 53 after a break in the yarn 33 between the air-jet spinning device 23 and the take-up device 31 to pass through, while ensuring the length of the captured yarn 69. A yarn intervention device 27 is provided in the space 75 between the yarn storage device 25 and the suction device 29, corresponding to the yarn capture interval S1.

[0092] Therefore, the distance between the yarn storage device 25 and the suction device 29 can be sufficiently ensured. Consequently, the length of the suction flow used by the suction device 29 to capture the yarn 69 can be substantially increased. As a result, the yarn 69 can be easily captured in the suction device 29. Moreover, by arranging the yarn intervention device 27 in a space equivalent to the distance ensured for this purpose, space can be used efficiently.

[0093] In the air-jet spinning machine 1 of this embodiment, the interval between the yarn storage device 25 and the suction device 29 is 50 mm or more and 150 mm or less in the traveling direction (up and down direction) of the spinning 33.

[0094] Therefore, while maintaining the compactness of the structure, it is possible to reliably capture the yarn 69 with the suction device 29, and to ensure space for the yarn intervention device 27.

[0095] In the air-jet spinning machine 1 of this embodiment, the yarn intervention device 27 is a yarn treatment device and includes a waxing device 65 capable of maintaining the wax applied to the spinning 33.

[0096] Therefore, a space-efficient layout can be achieved for the waxing device 65. The waxing device 65 is a device of a certain length, so the suction device 29 can be configured separately from the yarn storage device 25, and the yarn 69 can be easily captured by the suction device 29.

[0097] In the air-jet spinning machine 1 of this embodiment, the yarn intervention device 27 is equipped with a yarn travel sensor 67 that detects the presence or absence of spinning 33 as a yarn detection device.

[0098] Therefore, a space-efficient layout can be achieved for the yarn travel sensor 67. Since the yarn travel sensor 67 is a device of a certain length, the attraction device 29 can be separately configured relative to the yarn storage device 25, and the yarn can be easily captured by the attraction device 29.

[0099] In the air-jet spinning machine 1 of this embodiment, the suction device 29 has a suction port 73 between the yarn intervention device 27 and the take-up device 31, which is an opening for the yarn passage that leads to the spinning 33. The suction port 73 is formed to be relatively long along the direction of the yarn passage.

[0100] Therefore, the yarn 69 on the winding device 31 side can be easily captured through the suction port 73.

[0101] In the air-jet spinning machine 1 of this embodiment, there is a gate 77 that can change the suction state of the suction device 29.

[0102] Therefore, for example, during normal take-up when the yarn 33 does not break, the suction device 29 can be prevented from operating on the yarn 33. Thus, energy saving can be achieved in the air-jet spinning machine 1.

[0103] In the air-jet spinning machine 1 of this embodiment, the air-jet spinning machine 1 includes a splicing device 105 and a suction tube 107. When the yarn 33 breaks between the air-jet spinning device 23 and the take-up device 31, the splicing device 105 splices the yarn 69 on the air-jet spinning device 23 side with the yarn 69 on the take-up device 31 side. The suction tube 107 catches the yarn on the air-jet spinning device 23 side and guides it toward the splicing device 105. In the case of splicing, the splicing device 105 is arranged vertically between the suction device 29 and the take-up device 31.

[0104] Therefore, during splicing, the yarn 69 on the take-up device 31 side is not subject to physical influences caused by the yarn interference device 27, etc. (e.g., contact of the waxing device 65 with the yarn 69). Thus, splicing can be performed smoothly.

[0105] The air-jet spinning machine 1 of this embodiment includes multiple drafting devices 21. Each drafting device 21 includes multiple drive rollers. All drive rollers constituting the drafting device 21 are driven independently relative to the drive rollers of other drafting devices 21.

[0106] Therefore, the driving of each part of the drafting device 21 (the drive rollers of each drafting roller pair) can be controlled independently and flexibly from other drafting devices 21.

[0107] The preferred embodiments of the present invention have been described above, but the above configuration can be modified, for example, as follows.

[0108] In the above embodiment, the yarn intervention device 27 includes a waxing device 65 and a yarn travel sensor 67. Alternatively, for example, the yarn intervention device 27 may only include the waxing device 65, or the yarn intervention device 27 may only include the yarn travel sensor 67.

[0109] The yarn intervention device 27 may also include a yarn treatment device other than the waxing device 65. For example, a tension adjustment device that adjusts the tension of the spinning 33 can be cited as such a yarn treatment device.

[0110] The yarn intervention device 27 can be equipped with various configurations of yarn detection devices, regardless of whether they are contact or non-contact types.

[0111] In the above embodiment, the splicing device 105 and the suction tube 107 for splicing are provided on a splicing carriage 9 shared by multiple spinning units 7. In other words, the splicing device 105 and the suction tube 107 move together with the splicing carriage 9 relative to the multiple spinning units 7 to perform splicing operations. However, the splicing device 105 and the suction tube 107 can also be provided independently in each spinning unit 7. In this configuration, the suction device 29, the splicing device 105, and the take-up device 31 are arranged sequentially from top to bottom and in a vertical direction not only during splicing. In the configuration where each spinning unit 7 is provided with the splicing device 105 and the suction tube 107, if the yarn 33 breaks in a certain spinning unit 7, the splicing operation can be completed in that spinning unit and spinning can be restarted. In this configuration, the splicing carriage 9 can be omitted.

[0112] The configuration and position of the gate 77 are arbitrary, as long as the generation / stopping of the suction airflow can be switched. For example, the gate 77 can also be set at the suction port 73.

[0113] In the above embodiment, the yarn 33 is drawn out of the air-jet spinning device 23 by the yarn storage device 25. Alternatively, the spinning unit 7 may be configured such that the yarn 33 is drawn out of the air-jet spinning device 23 by a feed roller pair instead of the yarn storage device 25. In this case, the yarn storage device 25 may also be provided downstream of the feed roller pair.

[0114] Considering the foregoing teachings, it is obvious that the present invention can be modified and varied in many ways. Therefore, it should be understood that the present invention can be implemented, within the scope of the appended claims, by methods other than those described in this specification.

Claims

1. A gas stream spinning machine, characterized in that Possessing: Drafting device, drafting fiber bundle; Spinning device, twisting the fiber bundle drafted by the above drafting device by twist back airflow to generate yarn; Yarn accumulation device, configured at a lower position than the spinning device, temporarily accumulates the yarn generated by the spinning device; Yarn intervention device, configured at a lower position than the yarn accumulation device, intervenes the yarn; Winding device, configured at a lower position than the yarn intervention device, winds the yarn to form a package, Joint device, in the case of breakage of the yarn between the spinning device and the winding device, joint the yarn on the spinning device side and the yarn on the winding device side between the spinning device and the winding device; And Yarn capture guide device, capturing the yarn on the spinning device side and guiding towards the joint device, The yarn intervention device is a yarn processing device and / or a yarn detection device, The air spinning machine further comprises a suction device, which is arranged at a position lower than the yarn intervention device and higher than the winding device, and is configured to be able to suck the yarn, The suction device has a suction port opening towards the yarn passage between the yarn intervention device and the winding device, The suction port is fixedly arranged in the direction of the yarn passage, The yarn intervention device has a waxing device as the yarn processing device, which can keep the wax applied to the yarn, In the case of joint, the joint device is arranged between the suction device and the winding device in the vertical direction.

2. The air spinning machine according to claim 1, wherein The yarn accumulation device has a yarn accumulation roller that accumulates the yarn by winding the yarn on the outer peripheral surface, The suction device is arranged with a yarn capture interval having a predetermined interval in the vertical direction with respect to the yarn accumulation device, the yarn capture interval is for the yarn unwound from the yarn accumulation roller after the breakage of the yarn between the spinning device and the winding device, and ensures the length of the captured yarn, The yarn intervention device is arranged in the space between the yarn accumulation device and the suction device corresponding to the yarn capture interval.

3. The air spinning machine according to claim 1, wherein The interval between the yarn accumulation device and the suction device is 50mm or more and 150mm or less in the direction of the yarn travel.

4. The air spinning machine according to claim 2, wherein The interval between the yarn accumulation device and the suction device is 50mm or more and 150mm or less in the direction of the yarn travel.

5. The air spinning machine according to claim 1, wherein The yarn intervention device has a sensor as the yarn detection device to detect the presence or absence of the yarn.

6. The air spinning machine according to claim 2, wherein The yarn intervention device has a sensor as the yarn detection device to detect the presence or absence of the yarn.

7. The air spinning machine according to claim 1, characterized in that the suction port is formed long in a direction along the yarn passage.

8. The air spinning machine according to claim 2, characterized in that the suction port is formed long in a direction along the yarn passage.

9. The air spinning machine according to claim 1, characterized in that a change portion capable of changing the suction state of the suction device is provided.

10. The air spinning machine according to claim 2, characterized in that a change portion capable of changing the suction state of the suction device is provided.

11. The air spinning machine according to any one of claims 1 to 10, characterized in that a plurality of spinning units are provided, each of the spinning units is provided with the spinning device, the yarn storage device, the yarn intervention device, the suction device, and the take-up device, each of the spinning units is further provided with: a joint device disposed between the suction device and the take-up device in the vertical direction, and performing joint of the yarn on the spinning device side and the yarn on the take-up device side between the spinning device and the take-up device; and a yarn catching guide device that catches the yarn on the spinning device side and guides it toward the joint device.

12. The air spinning machine according to any one of claims 1 to 10, characterized in that a plurality of the draft devices are provided, each of the draft devices is provided with a plurality of drive rollers, all of the drive rollers constituting the draft device are independently driven with respect to the drive rollers of the other draft devices.

13. The air spinning machine according to claim 11, characterized in that a plurality of the draft devices are provided, each of the draft devices is provided with a plurality of drive rollers, all of the drive rollers constituting the draft device are independently driven with respect to the drive rollers of the other draft devices. ​

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