CN114575006A - Spinning machine - Google Patents

Abstract

The invention provides a spinning machine, which can properly process yarn on a package side under the condition that the yarn on the upstream side of a yarn storage device in the yarn advancing direction is broken through a simple structure. The spinning machine is provided with a yarn feeding device (23), a winding device (21), a yarn storage device (17), a detection device (81), a catching device (83), and a first injection device (97). The yarn storing device is provided with a yarn storing roller (41) for storing the spun yarn (7) from the yarn feeding device. When the spun yarn is cut at the upstream side of the yarn accumulating device in the yarn traveling direction, the detecting device detects the yarn end (7t) of the spun yarn on the package (9) side. The catching device catches a yarn end of the spun yarn on the package side on a downstream side of the yarn accumulating device. The first injection device injects air toward the trapping device. The winding of the spun yarn on the package side is stopped based on the detection result of the detection device so that the yarn end of the spun yarn on the package side is stopped at a position where the yarn end can be caught by the catching device.

Description

spinning machinery

technical field

The present invention relates to spinning machinery.

Background technique

Conventionally, a spinning machine including a yarn feeding device, a winding device, and a yarn storage device has been known. Patent Documents 1 and 2 disclose such spinning machines, respectively.

The spinning machine of Patent Document 1 includes a draft device, an air spinning machine (yarn feeding device), a winding device for forming a package, and a yarn storage device having a yarn storage roller. The yarn storage roller is provided on the downstream side of the spinning device (part of the yarn feeding device) in the yarn advancing direction, and can temporarily store the spun yarn by winding the spun yarn around the outer peripheral surface and rotating it. This spinning machine is provided with a traveling detection sensor disposed on the downstream side of the yarn storage roller in the yarn traveling direction. The running detection sensor can detect at least any one of whether the spun yarn is running on the yarn path and whether or not running is stopped on the downstream side of the storage roller.

The spinning machine of Patent Document 2 includes a draft device, an air-flow spinning machine (yarn feeding device), a winding device for generating a package, and a yarn storage device. The yarn storage roller included in the yarn storage device can temporarily store the yarn fed from the open-end spinning machine (a part of the yarn feeding device) by winding the yarn. This spinning machine includes a first suction device arranged on the downstream side of the yarn storage roller in the yarn advancing direction. When the yarn is broken between the yarn storage device and the winding device in the yarn running direction (on the downstream side of the yarn storage device in the yarn running direction), in order to remove the broken yarn remaining on the yarn storage roller, the first A suction device sucks the downstream end of the broken yarn.

Patent Document 1: Japanese Patent Application Laid-Open No. 2013-067891

Patent Document 2: Japanese Patent Laid-Open No. 2019-108629

In the configurations of the above-mentioned Patent Documents 1 and 2, when the yarn is broken on the upstream side of the yarn storage device in the yarn traveling direction, a part of the yarn on the winding device side can be wound on the winding device by the winding device. Pack. However, according to this structure, the yarn on the winding device side (the yarn on the package side) may not be properly handled. For example, if the yarn end of the yarn on the package side is completely wound around the package, the yarn end may not be properly pulled out of the package.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a spinning machine capable of appropriately handling the yarn on the package side with a simple structure when the yarn is broken on the upstream side of the yarn storage device in the yarn traveling direction. .

From the viewpoint of the present invention, a spinning machine having the following structure is provided. That is, this spinning machine includes a yarn feeding device, a winding device, a yarn storage device, a detection device, a catching device, and a first spray device. The above-mentioned yarn feeding device can supply the yarn. The winding device winds the yarn supplied from the yarn feeding device to form a package. The yarn storage device is arranged in the middle of the yarn traveling path formed between the yarn feeding device and the winding device. The yarn storage device includes a yarn storage roller that winds and stores the yarn supplied from the yarn supplying device. The detection device detects the yarn end of the yarn on the package side when the yarn is broken on the upstream side in the yarn traveling direction from the yarn storage device. The catching device catches the yarn end of the yarn on the package side on the downstream side of the yarn storage device. The first spray device sprays air toward the capture device. The winding of the yarn on the package side is stopped based on the detection result of the detection device so that the yarn end of the yarn on the package side is stopped at a position where it can be caught by the catching device.

In this specification, when the detection device detects the yarn end of the yarn on the package side, the detection of the part where the yarn has completely ended and the detection of the area of the yarn near the end of the yarn are included.

Thereby, the yarn end of the yarn on the package side is detected by the detection device, whereby the rotation of the package can be easily stopped at the position where the yarn end of the yarn on the package side can be caught by the catching device . Therefore, when the yarn is broken on the upstream side in the yarn traveling direction of the yarn storage device, the yarn on the package side can be handled with a simple structure. By jetting air from the first jetting device, the yarn end of the yarn on the package side can be guided toward the catching device. Therefore, the yarn end can be surely caught by the catching device.

Preferably, in the spinning machine described above, the detection device is a sensor arranged to detect the outer peripheral surface of the storage roller.

Thereby, the winding of the yarn on the package side can be stopped at an appropriate timing.

Preferably, in the spinning machine described above, the sensor is a reflection-type sensor.

Thereby, the yarn end of the yarn on the package side can be easily detected.

In the above-mentioned spinning machine, the following configurations are also possible. That is, the said detection means is a sensor arrange|positioned to detect the downstream side area|region of the yarn traveling direction of the said yarn storage roller. The above-mentioned spinning machine further includes a restriction unit. The restricting means restricts the yarn path of the yarn unwound from the yarn storage roller included in the yarn traveling path before the sensor detects the yarn end of the yarn on the package side.

In this case, the detection of the yarn end by the sensor can be performed in a state in which the yarn traveling path of the yarn on the package side is stable. Therefore, the yarn end of the yarn on the package side can be reliably detected.

In the spinning machine described above, the detection device may be configured as a line sensor.

In this case, the yarn end of the yarn on the package side can be reliably detected.

Preferably, in the spinning machine described above, the catching device includes an air intake device that generates a suction flow by supplying compressed air.

Thereby, the yarn can be strongly attracted in the catching device by the flow of the air by the jet air. Therefore, when the package is rotated in the reverse direction in order to unwind the yarn from the package, it is possible to prevent the yarn on the package side from being wound in the reverse direction with respect to the package.

In the spinning machine described above, it is preferable that the first jetting device is disposed on the opposite side of the catching device across a part of the yarn traveling path.

Thereby, the yarn end can be surely caught by the catching device.

In the above-mentioned spinning machine, the following structures are preferable. That is, the said catching device is provided with the cylindrical tube which formed the opening for catching at the front-end|tip. The above-mentioned opening for capturing is fixedly provided. The above-mentioned tube is connected to the suction source.

Thereby, a simple structure of the capturing device can be realized.

In the above-mentioned spinning machine, the following structures are preferable. That is, the above-described spinning machine includes a guide member and a yarn detection sensor. The said guide member is arrange|positioned downstream rather than the said storage roller, and guides the yarn wound on the said package. The said yarn detection sensor is arrange|positioned downstream rather than the said guide member, and detects the yarn wound on the said package.

Thereby, the yarn can be reliably detected on the downstream side of the guide member.

In the above-mentioned spinning machine, the following structures are preferable. That is, the spinning machine is provided with a wire connection device. When the yarn is disconnected on the upstream side of the yarn storage device in the yarn traveling direction, the yarn stitching device performs a stitching process for connecting the yarn on the yarn feeding device side and the yarn on the package side.

Thereby, even when the yarn is disconnected on the upstream side of the yarn storage device in the yarn traveling direction, the stitching process can be performed to restart the winding of the package.

In the above spinning machine, it is preferable that the catching device is arranged between the yarn storage device and the threading device in the yarn advancing direction, and is arranged in the yarn storage device in the yarn advancing direction rather than the winding device. near.

Thereby, when the yarn on the upstream side of the yarn storage device is broken in the yarn traveling direction, the yarn on the package side can be easily caught by the catching device located in the vicinity of the yarn storage device. In addition, since the yarn on the package side is caught by the catching device between the yarn storage device and the stitching device, the caught yarn on the package side can be smoothly stitched by the stitching device.

In the above-mentioned spinning machine, the following structures are preferable. That is, the spinning machine includes the second injection device. When the yarn is broken on the downstream side in the yarn traveling direction from the yarn storage device, the second spray device sprays air so as to guide the yarn end of the yarn on the package side toward the catching device.

Thereby, even if the yarn end of the yarn on the package side is located on the downstream side of the catching device, the yarn on the package side can be pulled out from the package and caught by the catching device.

In the above-mentioned spinning machine, the following structures are preferable. That is, the spinning machine includes a yarn monitoring device capable of detecting a yarn defect included in the yarn supplied from the yarn feeding device. When the yarn monitoring device detects a yarn defect, the yarn is disconnected on the upstream side in the yarn traveling direction from the yarn storage device. After the yarn on the package side is caught by the catching device, the winding device rotates the package in a direction opposite to the winding direction of the package so as to be removed by the catching device. The length of yarn required for the above-mentioned yarn defect among the yarns.

Thereby, the yarn defect detected by the yarn monitoring device can be reliably removed by the catching device.

Description of drawings

FIG. 1 is a side view showing the configuration of a spinning unit included in a spinning machine according to an embodiment of the present invention.

Figure 2 is a control block diagram of the spinning unit.

Fig. 3 is a diagram showing a positional relationship between a yarn storage roller and a suction device in the yarn storage device.

Fig. 4 is a view showing the rotation state of the package and the yarn storage roller.

5 is a perspective view illustrating a detection device and a capture device.

Description of reference numbers:

1...spinning unit; 7...spinning yarn (yarn); 9...package; 17...yarn storage device; 19...threading device; 21...winding device; 23...yarn feeding device; 81...detection means; 83...capture means; 87...suction means; 97...first injection means; 105...second injection means.

Detailed ways

A spinning machine according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2 . In the following description, "upstream" and "downstream" respectively refer to the upstream and downstream of the yarn (specifically, the sliver 3, the fiber bundle 5, and the spun yarn 7) in the traveling direction (yarn traveling direction).

The spinning machine includes at least one spinning unit 1 and a machine control device (not shown). The machine control device manages one or more spinning units 1 . The spinning unit 1 conveys the fiber bundle 5 to the downstream side in the yarn traveling direction by the drafting device 11 , spins the fiber bundle 5 sent from the drafting device 11 by the spinning device 13 to form a spun yarn 7 , and winds the spun yarn by the winding device 21 7 The package 9 is formed. Although the cylindrical package 9 is illustrated in FIG. 5 , the spinning machine may be configured such that the spun yarn 7 is wound around the conical package 9 .

As shown in FIG. 1 , one spinning unit 1 includes a drafting device 11 , a spinning device 13 , a yarn monitoring device 15 , a yarn storage device 17 , a threading device 19 , and a winding device 21 . The drafting device 11, the spinning device 13, the yarn monitoring device 15, the yarn storage device 17, the threading device 19, and the winding device 21 are arranged in this order from the upstream side to the downstream side in the yarn traveling direction.

As shown in FIG. 2 , the above-described devices and the like included in the spinning unit 1 are controlled by a unit controller (control device) 25 provided in the spinning unit 1 . In addition, at least one of the plurality of devices included in the spinning unit 1 may be controlled by the machine control device. In addition, one unit controller may be provided for every predetermined number of spinning units 1 .

The draft device 11 generates the fiber bundle 5 by drawing (drafting) the sliver 3 supplied from the can or the like (not shown). The drafting device 11 rotates the drafting rollers in the drafting direction while sandwiching the sliver 3 between the plurality of drafting rollers and the plurality of opposing rollers facing them, and conveys the sliver 3 to the downstream side, The fiber bundle 5 is produced by drawing this to a predetermined fiber amount (or thickness).

The draft device 11 includes a rear roll 31 , side rolls 33 , an intermediate roll 35 , and a front roll 37 as a plurality of draft rolls. The above-mentioned rollers 31, 33, 35, and 37 are arranged in this order from the upstream side toward the downstream side. A rubber-made dragon belt 39 is wound around the intermediate roller 35 . Each draft roller is rotationally driven at a predetermined rotational speed.

The spinning device 13 is provided on the downstream side of the front roller 37 of the drafting device 11 . The spinning device 13 twists the fiber bundle 5 supplied from the drafting device 11 to produce a spun yarn (yarn) 7 . In the present embodiment, as the spinning device 13, an air-type spinning device for twisting the fiber bundle 5 by a whirling airflow is used.

In the spinning unit 1 (spinning machine), the drafting device 11 and the spinning device 13 constitute a yarn feeding device 23 capable of supplying the spun yarn 7 . The spun yarn 7 produced by the yarn feeding device 23 travels from the yarn feeding device 23 toward the winding device 21 . Between the yarn feeding device 23 and the winding device 21, a yarn path (yarn traveling path) through which the spun yarn 7 travels is formed.

A yarn monitoring device 15 is provided on the downstream side of the spinning device 13 . The yarn monitoring device 15 monitors the presence or absence and quality of the spun yarn 7 (thickness and/or presence or absence of foreign matter, etc.). In the yarn monitoring device 15, non-contact monitoring by a transmissive optical sensor is performed. The yarn monitoring device 15 transmits a yarn defect detection signal to the unit controller 25 when a yarn defect of the spun yarn 7 (for example, a portion having an abnormality in the thickness of the spun yarn 7 ) is detected.

The unit controller 25 cuts the spun yarn 7 by stopping the spinning in the spinning device 13 when the yarn defect detection signal is received. The unit controller 25 stops the drafting operation of the drafting device 11 when the weaving in the spinning device 13 is stopped. The unit controller 25 stops the winding operation of the winding device 21 and the pulling-out operation of the yarn storage device 17 simultaneously with the cutting of the spun yarn 7 or when a predetermined time has elapsed since the cutting of the spun yarn 7 .

The yarn monitoring device 15 is not limited to a transmissive optical sensor, for example, the presence or absence and quality of the spun yarn 7 may be monitored by a capacitive sensor. Instead of the structure in which the spinning is stopped and the spun yarn 7 is cut, a structure in which the spun yarn 7 is cut by a cutting device provided in the vicinity of the yarn monitoring device 15 may be adopted.

A yarn storage device 17 is provided on the downstream side of the yarn monitoring device 15 (ie, on the downstream side of the spinning device 13 ). The yarn storage device 17 is arranged in the middle of a yarn path (yarn traveling path) formed between the yarn feeding device 23 and the winding device 21 . The yarn storage device 17 includes a yarn storage roller 41, a yarn storage motor 43, a flyer (yarn hanging member) 45, a yarn detection sensor 47, a suction device (yarn action part) 49, and a yarn end removing lever (yarn end removing member) 51.

The yarn storage roller 41 can wind and store the spun yarn 7 supplied from the yarn feeding device 23 . The spun yarn 7 is stored in a state of being wound around the outer peripheral surface of the storage roller 41 . The yarn storage roller 41 is rotated in the forward rotation direction or the reverse rotation direction by the yarn storage motor 43 . In the present embodiment, since a known conveying roller pair is not provided between the spinning device 13 and the yarn storage device 17 , the yarn storage device 17 performs a pulling operation of pulling out the spun yarn 7 from the spinning device 13 .

The yarn storage motor 43 is configured as an electric motor capable of forward and reverse rotation. The yarn storage motor 43 rotates the yarn storage roller 41 in the forward rotation direction by rotating in the forward rotation direction. The yarn storage motor 43 rotates the yarn storage roller 41 in the reverse direction by rotating in the reverse direction. The yarn storage motor 43 rotates the yarn storage roller 41 in the forward rotation direction so that the yarn storage motor 43 performs a pull-out operation during normal spinning in the spinning unit 1 .

The flyer 45 is attached to the downstream end (front end) of the storage roller 41 . The flyer 45 is provided so as to be able to come into contact with the spun yarn 7 drawn from the yarn storage roller 41 . The flyer 45 is supported so as to be rotatable relative to the yarn storage roller 41 . A permanent magnet is attached to either the flyer 45 or the yarn storage roller 41, and a hysteresis material is attached to the other. The torque against the relative rotation of the flyer 45 with respect to the yarn storage roller 41 is generated by the above-mentioned magnetic device. Therefore, in the state where the spun yarn 7 is hooked on the flyer 45, only when a force against the above-mentioned torque is applied to the flyer 45 (that is, when the spun yarn 7 is hooked to the spun yarn 7 with a predetermined or higher tension), the flyer 45 The yarn storage roller 41 can be rotated relative to the yarn storage roller 41 to unwind the spun yarn 7 wound around the yarn storage roller 41 . On the other hand, when the force against the torque is not applied to the flyer 45, the yarn storage roller 41 and the flyer 45 rotate integrally, and the spun yarn 7 is stored in the yarn storage roller 41.

In this way, the yarn storage device 17 operates to unwind the spun yarn 7 when the tension of the spun yarn 7 on the downstream side increases, and stops the unwinding of the spun yarn 7 when the tension of the spun yarn 7 on the downstream side decreases (the spun yarn 7 is slack). Thereby, the yarn storage device 17 can eliminate the slack of the spun yarn 7 and apply an appropriate tension to the spun yarn 7 . In addition, by operating the flyer 45 to absorb fluctuations in the tension of the spun yarn 7 applied between the yarn storage device 17 and the winding device 21 as described above, it is possible to prevent the fluctuation of the tension from affecting the movement from the spinning device 13 to the yarn storage device. The spun yarn 7 between the device 17 and the device 17 is affected.

Instead of such a magnetic device, the yarn storage device 17 may be provided with an electromagnet instead of the permanent magnet. Alternatively, the yarn storage device 17 may not include a magnetic device, but may include a motor for rotationally driving the flyer 45 .

The yarn detection sensor 47 is a sensor for detecting the stored yarn amount of the yarn storage roller 41 . The yarn detection sensor 47 is provided so as to be able to detect the spun yarn 7 at a predetermined position of the yarn storage roller 41, and by detecting the presence or absence of the spun yarn 7 at the predetermined position, it is possible to detect whether the stored yarn amount is a predetermined amount or more. The yarn detection sensor 47 can be, for example, an optical reflection type sensor, an electrostatic capacitance type proximity sensor, or a transmission type sensor. When the spun yarn 7 is wound on the package 9, the unit controller 25 controls the rotational speed of the winding drum 63 of the winding device 21 based on the detection result of the yarn detection sensor 47 so that the yarn storage amount of the yarn storage roller 41 becomes a predetermined amount The amount (value) within the range is adjusted.

The suction device 49 is arranged on the side of the storage roller 41 in the direction intersecting with the axial direction of the storage roller 41 . The suction device 49 includes a hollow tube 73 . The suction device 49 is connected to a suction source (not shown) as a negative pressure source, and can generate suction airflow in the pipe 73 . The suction device 49 generates suction airflow around the yarn storage roller 41 when the spun yarn 7 is broken on the upstream side in the yarn traveling direction (between the yarn feeding device 23 and the yarn storage device 17 ) from the yarn storage device 17 . Thereby, the suction device 49 can suck and catch the portion on the upstream side of the yarn storage roller 41 among the spun yarns 7 on the side of the package 9 .

The yarn end removing lever 51 is arranged near the yarn storage roller 41 . The yarn tail removal lever 51 can perform a yarn tail removal operation of removing the spun yarn 7 (yarn traveling path) from the flyer 45 . The yarn end removal lever 51 is provided so as to be movable between the standby position and the yarn end removal position. FIG. 1 shows a state where the yarn end removing lever 51 is located at the standby position, and arrows indicate the moving direction of the yarn end removing lever 51 when it moves from the standby position to the yarn end removing position. The yarn end removing lever 51 passes through the space on the downstream side of the yarn storage roller 41 in the process of moving from the standby position to the yarn end removing position. At this time, if the spun yarn 7 is hooked on the flyer 45 , the yarn end removing lever 51 acts on the spun yarn 7 , and the spun yarn 7 is removed from the flyer 45 .

In the present embodiment, the yarn tail removing lever 51 is configured as a single hammer drive type. That is, the yarn end removing rod 51 is provided in each spinning unit 1, and a separate driving unit (motor, air cylinder, etc.) is provided for each yarn end removing rod 51. As shown in FIG. Therefore, the yarn end removal lever 51 can be actuated independently of the yarn end removal levers 51 of the other spinning units 1 .

A guide (guide member) 55 for guiding the spun yarn 7 wound around the package 9 is provided on the downstream side of the storage roller 41 . The guide 55 can restrict the path of the spun yarn 7 at a position downstream of the storage roller 41 . The guide 55 is, for example, a U-shape or a partially cut-out circular portion formed on a plate-shaped member fixed to the spinning unit 1 .

The threader 19 is provided on the downstream side of the guide 55 (that is, on the downstream side of the yarn storage device 17). When the spun yarn 7 is disconnected between the yarn feeding device 23 and the winding device 21 in the yarn traveling direction, the stitching device 19 performs a stitching process for connecting the spun yarn 7 from the yarn feeding device 23 and the spun yarn 7 from the package 9 . In the present embodiment, the splicing device 19 is a splicing device that twists the yarn ends with each other by a swirling airflow generated by air. In addition, as the wiring device 19, a mechanical knotter or the like can be used in place of the splicing device, for example.

A guide device 57 is provided in the spinning unit 1 . The guide device 57 guides the spun yarn 7 from the yarn feeding device 23 to the threading device 19 when the spun yarn 7 is broken on the upstream side of the yarn storage device 17 . The guide device 57 is supported so as to be rotatable in the vertical direction through one end portion in the longitudinal direction thereof. The guide device 57 includes a hollow member, and is connected to a suction source (not shown). The guide device 57 can generate a suction airflow at the suction port 59 provided at the other end in the longitudinal direction. The guide device 57 can catch the yarn end of the spun yarn 7 from the yarn feeding device 23 through the suction port 59 by rotating downward. The guide device 57 can guide the yarn end of the spun yarn 7 to the threading device 19 by turning it upward after catching the yarn end of the spun yarn 7 from the yarn feeding device 23 .

The yarn end of the spun yarn 7 from the yarn feeding device 23 is guided to the threading device 19 via the guiding device 57 . As will be described later, the spun yarn 7 from the package 9 is caught by the catching device 83 and guided to the threading device 19 . In this state, the threading device 19 is driven, whereby threading processing is performed to connect the spun yarn 7 from the yarn feeding device 23 to the spun yarn 7 from the package 9 . Thereby, even when the spun yarn 7 is broken on the upstream side of the yarn storage device 17, the spinning unit 1 can resume the stopped spinning and perform the stitching process, and the spun yarn 7 from the yarn feeding device 23 can be rewound on the spool. Load 9.

The winding device 21 is provided on the downstream side of the yarn storage device 17 (in the present embodiment, on the downstream side of the threading device 19 ). The winding device 21 winds the spun yarn 7 supplied from the yarn feeding device 23 to form the package 9 . In the present embodiment, in the height direction of the spinning unit 1 , the winding device 21 is provided at a position higher than the upstream end portion of the drafting device 11 . In this way, the spinning unit 1 has a layout in which the yarn channels are arranged to extend from bottom to top. The winding device 21 includes a rocker arm 61 and a winding drum 63 .

The rocker arm 61 can rotatably support the winding tube 67 for winding the spun yarn 7 . The rocker arm 61 is rotatable with its root as the center of rotation. Accordingly, in the winding device 21, even if the diameter of the package 9 increases due to the winding of the spun yarn 7 around the winding tube 67, the winding of the spun yarn 7 can be appropriately continued.

The winding drum drive motor (not shown) of the winding drum 63 is controlled by the unit controller 25 , and the winding drum 63 rotates while being in contact with the outer peripheral surface of the winding tube 67 or the package 9 . A traverse groove (not shown) is formed on the outer peripheral surface of the winding drum 63, and the spun yarn 7 can be laterally moved by a predetermined width by the traverse groove. As a result, the winding device 21 can wind the spun yarn 7 around the winding tube 67 while moving the spun yarn 7 laterally to form the package 9 .

In the present embodiment, the winding device 21 is configured as a single hammer drive type. That is, the winding device 21 provided in each spinning unit 1 is configured to have a separate drive unit (winding drum drive motor), thereby rotating the winding drum 63 and thereby rotating the package 9 . The winding device 21 can change the rotation operation of the package 9 independently of the winding device 21 of the other spinning unit 1 .

Instead of the configuration including the winding drum 63 in which the traverse grooves are formed, the winding device 21 may include a winding drum without the traverse grooves, and a lateral guide that is provided independently of the winding drum and that reciprocates. known structure.

Next, the processing of the spun yarn 7 on the package 9 side performed when the spun yarn 7 is disconnected between the yarn feeding device 23 and the yarn storage device 17 will be described with reference to FIGS. 3 and 4 .

When the spinning of the spinning unit 1 is normally performed, the package 9 in the winding device 21 and the yarn storage roller 41 of the yarn storage device 17 are respectively rotated in predetermined directions. In the following description, the predetermined direction in which the package 9 rotates at this time may be referred to as the forward rotation direction, and the predetermined direction in which the yarn storage roller 41 is rotated may be referred to as the forward rotation direction.

In the spinning unit 1, when the spun yarn 7 is supplied from the yarn feeding device 23 and the package 9 rotates in the forward rotation direction, the spun yarn 7 may be cut according to the monitoring result of the yarn monitoring device 15 as described above. At this time, the spun yarn 7 is disconnected between the yarn feeding device 23 and the yarn storage device 17 in the yarn traveling direction. In the present embodiment, the supply operation of the yarn feeding device 23 is stopped, whereby the spun yarn 7 is cut. Then, the pulling-out operation of the yarn storage device 17 and the winding-up operation of the winding device 21 are immediately stopped or stopped after a predetermined time has elapsed.

At the time point when the spun yarn 7 is broken, the yarn end 7t of the spun yarn 7 on the package 9 side is located between the yarn feeding device 23 and the yarn storage device 17, as indicated by the dashed-dotted line in FIG. 1 . In the present embodiment, the yarn end 7t (refer to reference numeral 7c in FIG. 3 ) is caught in advance by the suction device 49 of the yarn storage device 17, and in this state, the spun yarn 7 is wound at a slower speed than before the spun yarn 7 is broken. The winding operation of the take-up device 21 causes the spun yarn 7 remaining on the yarn storage roller 41 to be unwound from the yarn storage roller 41 to the winding device 21 side. The operation of the suction device 49 at this time will be described later.

The unwinding of the spun yarn 7 from the storage roller 41 is performed, and as a result, the unwinding of the spun yarn 7 from the storage roller 41 is completed. When the spun yarn 7 is completely unwound from the yarn storage roller 41, its end is separated from the yarn storage roller 41, and is captured by the capturing device 83 shortly thereafter. The change in the yarn path accompanying the capturing of the spun yarn 7 by the capturing device 83 is detected by the detection device 81 . In addition, the capturing device 83 and the detection device 81 will be described in detail later.

When the detection device 81 no longer detects the spun yarn 7 , the unit controller 25 stops the rotation of the package 9 in the forward rotation direction by the winding device 21 . As a result, the yarn end 7t of the spun yarn 7 on the package 9 side can be positioned on the downstream side from the yarn storage device 17 and on the upstream side from the winding device 21 .

Accordingly, when the spun yarn 7 is disconnected between the yarn feeding device 23 and the yarn storage device 17 in the yarn traveling direction, the spun yarn 7 on the package 9 side can be appropriately handled with a simple structure. In the present embodiment, yarn defects included in the spun yarn 7 on the package 9 side can be removed from the spun yarn 7 by the capturing device 83 . The position where the yarn end 7t of the spun yarn 7 on the package 9 side is caught by the catching device 83 is not particularly limited, and may be any position between the yarn storage device 17 and the winding device 21 in the yarn traveling direction.

Next, the suction device 49 will be described in detail. When the spun yarn 7 is disconnected between the yarn storage device 17 and the yarn feeding device 23, the drafting operation of the drafting device 11 is immediately stopped. In conjunction with the stop of the drafting operation, the pulling-out operation of the yarn storage device 17 and the winding-up operation of the winding device 21 are stopped immediately or after a predetermined time has elapsed. Therefore, in a state where the yarn end 7t of the spun yarn 7 on the package 9 side is arranged on the upstream side of the yarn storage roller 41, the spun yarn 7 on the package 9 side is connected with the yarn storage device 17 between the package 9 and the yarn storage device 17. Status stopped. Next, the rotation of the package 9 in the forward rotation direction of the winding device 21 is resumed at a lower speed than before breaking, and the spun yarn 7 is unwound from the storage roller 41 to the downstream side. During this unwinding operation, the yarn end 7t on the upstream side of the yarn storage roller 41 is sucked and caught by the suction device 49 .

Specifically, the unit controller 25 generates a suction airflow through the suction device 49, and causes the suction device 49 to suck and capture the yarn end 7t located upstream of the yarn storage roller 41 from the suction port 71. Thereby, until all the spun yarns 7 remaining on the storage roller 41 are unwound to the downstream side, the spun yarns 7 are guided so that the path of the spun yarns 7 on the upstream side of the storage roller 41 does not change during this period. In other words, the suction device 49 restricts the behavior so that the yarn end 7t of the spun yarn 7 does not become free, and maintains the position of the spun yarn 7 .

As shown in FIG. 3 , the suction device 49 includes a tube 73 . The tube 73 has a suction port 71 at one end in the longitudinal direction, and is connected to a suction source 75 at the other end in the longitudinal direction. The suction port 71 faces the yarn storage roller 41 . A first valve 77 is provided at a midway portion in the longitudinal direction of the pipe 73 . Opening and closing of the first valve 77 is controlled by the unit controller 25 . By controlling to open the first valve 77 , the suction airflow can be generated in the pipe 73 of the suction device 49 . By performing control to close the first valve 77 , the suction airflow of the pipe 73 can be stopped. When the suction air flow is generated, the suction force acts on the outer peripheral surface of the storage roller 41 , and the spun yarn 7 wound around the outer peripheral surface (the spun yarn 7 remaining on the storage roller 41 ) is sucked from the suction port 71 . The suction source 75 is provided at, for example, a table end of a spinning machine, and is shared by a plurality of spinning units 1 .

The suction port 71 is arranged to face the yarn introduction portion 79 of the yarn storage device 17 . The yarn introduction portion 79 is an area located directly in front of the position where the winding of the spun yarn 7 starts substantially among the outer peripheral surfaces of the yarn storage roller 41 .

The yarn introduction portion 79 will be described in detail. The yarn storage roller 41 has a cylindrical storage portion 41a around which the spun yarn 7 is wound helically. In FIG. 3, although the storage part 41a is shown in the cylindrical shape with a constant outer diameter, it may be comprised so that it may have a tapered shape which becomes small gradually or linearly as an outer diameter goes downstream. As the package 9 is rotated in the forward rotation direction, the spun yarn 7 is wound, and in the storage portion 41a of the yarn storage roller 41, the spun yarn 7 travels from upstream to downstream in a spiral path. The axis of the storage roller 41 coincides with the helical axis on which the spun yarn 7 is wound. A tapered portion 41 b is formed in the storage roller 41 at the end portion corresponding to the upstream side of the spiral among both ends of the shaft of the storage roller 41 . The tapered portion 41b corresponds to the yarn introduction portion 79 .

Hereinafter, the upstream side in the axial direction of the yarn storage roller 41 refers to the upstream side of the spiral in the axial direction, and the downstream side in the axial direction refers to the downstream side of the spiral in the axial direction.

The tapered portion 41b is formed in a substantially conical shape with a diameter larger than that of the storage portion 41a. The diameter of the tapered portion 41b decreases as it approaches the storage portion 41a, and is equal to the diameter of the storage portion 41a at the portion connected to the storage portion 41a.

The yarn introduction portion 79 is disposed on the axially upstream side (lower in FIG. 3 ) of the yarn storage roller 41 than the most upstream portion 80 in which the spun yarns 7 are arranged and wound in the storage portion 41 a. The spun yarn 7 from the upstream side in the yarn traveling direction is guided to the most upstream portion 80 while being guided in contact with the yarn introduction portion 79 (taper portion 41b ) as required by the rotation of the storage roller 41 under tension.

By rotating the storage roller 41 while guiding the spun yarn 7 to a constant position, the spun yarn 7 wound earlier in the storage section 41a is pressed by the spun yarn 7 wound next, and moves little by little to the axial downstream side. As a result, the spun yarns 7 can be stored in the storage portion 41a in an aligned state.

The rotation control of the storage roller 41 and the package 9 when the spun yarn 7 on the upstream side of the storage roller 41 is broken will be specifically described with reference to the time chart of FIG. 4 . The time t0 is the time when the spun yarn 7 is broken. When the spun yarn 7 is disconnected, the unit controller 25 stops the rotation of the package 9 in the forward rotation direction and the rotation of the storage roller 41 in the forward rotation direction at the time t1 when a predetermined time has elapsed from the time t0. Specifically, the unit controller 25 stops the drive of the winding drum drive motor and the drive of the yarn storage motor 43 . The yarn end 7t of the spun yarn 7 on the package 9 side is wound around the storage roller 41 by the rotation in the forward rotation direction of the storage roller 41 before the stop at time t1. At the time point of time t1 , the yarn end 7t of the spun yarn 7 on the package 9 side is located in the vicinity of the most upstream portion 80 .

After that, the unit controller 25 maintains the state in which the rotation of the package 9 is stopped at time t2 and starts the rotation of the yarn storage roller 41 in the reverse direction. The rotation of the yarn storage roller 41 in the reverse direction continues until time t3.

The yarn end 7t of the spun yarn 7 on the package 9 side is sucked by the suction device 49 by the rotation of the yarn storage roller 41 in the reverse direction. Along with this, the spun yarn 7 is unwound from the yarn storage roller 41 to the upstream side. As described above, the suction port 71 of the suction device 49 is arranged to face the yarn introduction portion 79 . Therefore, in the process of rotating the yarn storage roller 41 in the reverse direction, the yarn end 7t located in the vicinity of the most upstream portion 80 is easily sucked by the suction port 71 . In FIG. 3 , the yarn end 7t in a state of being sucked into the suction device 49 is denoted by reference numeral 7c.

At time t3 when the yarn storage roller 41 is rotated in the reverse direction by a predetermined rotation amount, the unit controller 25 stops the rotation in the reverse direction.

At the same time t3 as the rotation in the reverse rotation direction is stopped, the yarn storage roller 41 starts to rotate in the forward rotation direction. The rotation of the yarn storage roller 41 in the forward rotation direction continues until time t4. The rotation in the forward rotation direction may be started after a predetermined time elapses after the rotation in the reverse rotation direction is stopped.

A part of the spun yarn 7 temporarily sucked into the suction device 49 is pulled out by the rotation of the storage roller 41 in the forward rotation direction from the time t3 to the time t4 and is wound around the storage roller 41 . Since the suction port 71 of the suction device 49 faces the yarn introduction portion 79 , the spun yarn 7 drawn from the suction device 49 is naturally guided to the most upstream portion from the yarn introduction portion 79 along with the rotation of the yarn storage roller 41 in the forward rotation direction. 80. Therefore, the spun yarns 7 can be well arranged in the storage portion 41a.

From time t3 to time t4, the yarn storage roller 41 rotates only slightly in the forward rotation direction. Specifically, the rotation amount in the forward rotation direction is smaller than the rotation amount in the reverse direction of the storage roller 41 after the spun yarn 7 is broken. Therefore, at this point in time, the yarn end 7c of the spun yarn 7 on the package 9 side is not completely pulled out from the suction device 49 . In other words, at the time point of time t4, the yarn end 7c is kept in a state of entering the inside of the suction device 49. As shown in FIG. That is, at this point in time, the yarn end 7c does not come out from the suction port 71 .

Although a part of the spun yarn 7 is pulled out from the suction device 49 with the rotation of the yarn storage roller 41 in the forward rotation direction, the suction device 49 acts on the suction air current that overcomes this pulling direction. Therefore, the suction device 49 also functions as a resistance applying portion, and applies resistance against the spun yarn 7 traveling in the direction wound around the storage roller 41 .

At time t4, after the yarn storage roller 41 stops rotating in the forward rotation direction, at time t5, the package 9 starts rotating in the forward rotation direction. As a result, since the spun yarn 7 is pulled toward the package 9 side, the spun yarn 7 is unwound from the yarn storage roller 41 to the downstream side. At this time, since the yarn end 7c on the upstream side is sucked into the suction device 49, the yarn end 7c can be prevented from being entangled with the unwound spun yarn 7 or the like. Therefore, the unwinding of the spun yarn 7 from the yarn storage roller 41 can be performed smoothly.

During the rotation of the package 9 in the forward rotation direction, the yarn end 7c from the suction device 49 starts to be pulled out almost simultaneously with the unwinding of the spun yarn 7 from the yarn storage roller 41 . As a result, the yarn end 7c of the spun yarn 7 on the package 9 side is pulled out from the suction device 49 and moved to the downstream side of the yarn storage device 17 .

Hereinafter, the meaning of the control to rotate the yarn storage roller 41 in the reverse rotation direction and the forward rotation direction as shown at times t2 to t4 will be described.

The spun yarn 7 is produced by twisting by the spinning device 13 . Therefore, when the spun yarn 7 is broken, the portion near the yarn end 7t tends to deform in a constant direction due to the influence of the twisting torque.

At the time point of time t1, as shown by reference numeral 7a in FIG. 3, the yarn end 7t is in a free state in the vicinity of the above-mentioned most upstream portion 80. The yarn end 7a in the free state is highly likely to come into contact with the spun yarn 7 remaining in the state of being wound in the storage portion 41a, as indicated by reference numeral 7b, due to the influence of the above-described torque.

If the yarn end 7t in the state indicated by the reference numeral 7b is entangled with the spun yarn 7 wound on the yarn storage roller 41, it will cause tension fluctuation and/or thread breakage. Or, the spun yarn 7 on the yarn storage roller 41 may be entangled and clumped and fall off together, causing slippage, and an unwinding error of the spun yarn 7 from the yarn storage roller 41 may occur.

As one method of preventing the yarn end 7a from being entangled with the spun yarn 7 wound on the yarn storage roller 41, it is also conceivable to gallop the yarn end 7a by centrifugal force. Therefore, in the process of pulling the spun yarn 7 downstream from the yarn storage roller 41 and unwinding, the yarn storage roller 41 can be rotated in the forward rotation direction at a certain speed. However, if the yarn storage roller 41 is rotated when the spun yarn 7 from the yarn storage roller 41 is unwound to the downstream side, undesired strength of twisting of the spun yarn 7 between the yarn storage roller 41 and the winding device 21 occurs. The change.

In this regard, in the present embodiment, first, the yarn storage roller 41 is rotated in the reverse direction, and the suction device 49 is caused to catch the free yarn end 7a. Thereby, the yarn end 7a is in a state of being separated from the yarn storage roller 41 as indicated by reference numeral 7c. After that, the yarn storage roller 41 is slightly rotated in the forward rotation direction while continuing the suction of the spun yarn 7 by the suction device 49 . Thereby, the slack of the spun yarn 7 between the suction device 49 and the yarn storage roller 41 is eliminated, and the spun yarn 7 is guided to the most upstream portion 80 from the suction port 71 via the yarn introduction portion 79 . In addition, by the rotation of the yarn storage roller 41 in the forward rotation direction, the winding action of the spun yarn 7 with respect to the outer peripheral surface of the yarn storage roller 41 is exerted.

From the above, the spun yarns 7 wound around the storage roller 41 are regularly arranged in the storage portion 41a. Therefore, by rotating the package 9 in the forward rotation direction while the rotation of the yarn storage roller 41 is stopped, the spun yarn 7 can be unwound from the yarn storage roller 41 to the downstream side in a neat spiral shape. After (or almost simultaneously) the unwinding of the last winding of the spun yarn 7 from the yarn storage roller 41 , the yarn end 7c is pulled out from the suction opening 71 of the suction device 49 . Therefore, the entanglement of the yarn ends 7t can be reliably prevented.

Next, the control related to the operation of the yarn end removing lever 51 shown in FIG. 1 will be described.

In the present embodiment, when the unwinding of the spun yarn 7 from the yarn storage roller 41 is completed, the yarn end removing lever 51 performs the yarn end removing operation. Hereinafter, this yarn end removal operation may be referred to as a first yarn end removal operation. The timing at which the first yarn end removing operation is performed is later than the timing at which the yarn end 7t of the spun yarn 7 is separated from the yarn storage roller 41 . In some cases, the time at which the first yarn end removal operation is performed is referred to as the first time.

The first yarn tail removing operation will be specifically described. When it is determined that the unwinding of the spun yarn 7 from the storage roller 41 is completed, the unit controller 25 controls the winding device 21 to stop the rotation of the package 9 . At approximately the same timing as the rotation of the package 9 is stopped, the unit controller 25 controls the yarn storage device 17 to move the yarn end removal lever 51 from the standby position to the yarn end removal position.

Shortly after the spun yarn 7 wound on the storage roller 41 is completely unwound, the yarn end 7t of the spun yarn 7 on the package 9 side passes downstream while passing through the vicinity of the flyer 45 while being separated from the storage roller 41 . In this process, the free yarn end 7t or its vicinity may come into contact with the flyer 45 and become entangled. In the present embodiment, at this time, the yarn end 7t or its vicinity can also be removed from the flyer 45 by performing the above-described first yarn end removing operation. In addition, the movement timing of the yarn end removing lever 51 is not particularly limited, and may be any timing as long as it is before the wire is connected by the wire-connecting device 19 .

It is not necessary to perform the first yarn tail removal action. For example, a sensor for detecting that the spun yarn 7 is not tangled may be provided on the flyer 45, and the first yarn tail removal operation may be performed only when the sensor detects that the spun yarn 7 is tangled. Alternatively, the removal of the first yarn tail may be omitted. In addition, in the present embodiment, the first yarn end removing operation is performed when the spun yarn 7 is assumed to be completely unwound from the storage roller 41 , and it is unclear whether the spun yarn 7 is actually unwound from the storage roller 41 .

The movement stroke (first movement amount) of the yarn end removing lever 51 in the case of performing the first yarn end removing operation and the movement stroke of the yarn end removing lever 51 when performing the second yarn end removing operation described later (the first movement amount) in other cases. The two actions) are different. In other words, the tail removal position relative to the flyer 45 is different in the two cases.

The other case refers to, for example, the case where the spun yarn 7 from the yarn feeding device 23 is guided to the yarn connecting device 19 by the guide device 57 in a series of stitching operations after the spun yarn 7 is disconnected. At this time, the spun yarn 7 guided by the guide device 57 is hooked on the rotating flyer 45, and the winding of the spun yarn 7 on the yarn storage roller 41 starts. After a predetermined amount (length) of the spun yarn 7 is wound around the yarn storage roller 41, the unit controller 25 moves the yarn end removing lever 51 from the standby position to the yarn end removing position. Hereinafter, this yarn end removal operation may be referred to as a second yarn end removal operation. Thereby, the spun yarn 7 can be removed from the flyer 45, and the spun yarn 7 that is wound around the yarn storage roller 41 at the start of spinning can be sucked and removed by the guide device 57. After that, the yarn tail removing lever 51 is returned to the standby position again, and the spun yarn 7 is hooked on the flyer 45 and wound on the yarn storage roller 41 . After that, the spun yarn 7 and the spun yarn 7 on the side of the package 9 that has been prepared by the catching device 83 are connected by the connecting device 19 . Hereinafter, the timing at which the second yarn end removing operation is performed may be referred to as the second timing. The second time is different from the first time described above.

When the flyer 45 is in contact with the vicinity of the free yarn end 7t, the entanglement of the flyer 45 and the spun yarn 7 is more likely to occur than when the flyer 45 is in contact with the middle part of the spun yarn 7. Therefore, in the present embodiment, the first motion amount is set to be larger than the second motion amount. In other words, the yarn tail removal position at the time of the first yarn tail removal operation is located at a position farther from the flyer 45 than the yarn tail removal position at the time of the second yarn tail removal operation. Thereby, even if the yarn end 7t is entangled with the flyer 45, the yarn end 7t can be reliably removed from the flyer 45 by the yarn tail removing lever 51.

Next, processing of the yarn end of the spun yarn 7 on the package 9 side after the spun yarn 7 from the yarn storage roller 41 is unwound when the spun yarn 7 is disconnected between the yarn feeding device 23 and the yarn storage device 17 will be described.

As shown in FIG. 5 , the spinning unit 1 is provided with a detection device 81 capable of detecting the yarn end 7t of the spun yarn 7 on the package 9 side. The detection device 81 can detect the yarn end 7t located between the yarn storage device 17 and the winding device 21 after unwinding from the yarn storage roller 41 . In the present embodiment, the detection device 81 is a sensor disposed on the downstream side of the yarn storage roller 41 in the yarn traveling direction. The detection device 81 is disposed nearer to the yarn storage device 17 than the winding device 21 in the yarn traveling direction.

In the present embodiment, the detection device (sensor) 81 is an optical reflection sensor. The structure of the detection device 81 is arbitrary, and for example, the detection device 81 may be an electrostatic capacitance type proximity sensor or a transmission type sensor.

The detection device 81 is arranged on the downstream side of the guide 55 . In detail, the detection device 81 is arranged between the guide 55 and the threading device 19 in the yarn traveling direction. The detection device 81 is arranged in the vicinity of the guide 55 . The guide 55 guides the path of the spun yarn 7 in the vicinity of the detection device 81 .

In the state where the spun yarn 7 is wound on the yarn storage roller 41 and the spun yarn 7 is pulled between the guide 55 and the winding device 21, the spun yarn 7 follows the path of the spun yarn 7 indicated by the dashed-dotted line in FIG. 5 ( A portion of the yarn travel path) 111 is positioned. The detection device 81 is arranged to face an appropriate position of the path 111 of the spun yarn 7, and detects whether the spun yarn 7 is located at this position.

Therefore, when the spun yarn 7 is in a continuous state between the yarn feeding device 23 and the winding device 21, since the spun yarn 7 is positioned along the path 111, the detection device 81 detects the presence of the spun yarn 7. When the yarn end 7t of the spun yarn 7 on the package 9 side is located downstream of the detection device 81 after the spun yarn 7 is broken, the detection device 81 does not detect the spun yarn 7 .

Even when the yarn end 7t of the spun yarn 7 on the package 9 side is located upstream of the detection device 81, the detection device 81 does not detect the spun yarn 7 when the spun yarn 7 is not wound on the storage roller 41. The reason for this is that the spun yarn 7 whose tension cannot be maintained is deviated from the path 111 and sucked into the catching device 83 described later. In this way, the detection device 81 detects whether the spun yarn 7 is located on the path 111 of the spun yarn 7 and detects whether the yarn end 7t is located between the yarn storage roller 41 and the winding device 21 almost the same.

In addition, the detection device 81 may be arranged at a stable position with respect to the movement of the spun yarn 7 . For example, the detection device 81 may be arranged at any position in the region on the downstream side of the axial center portion of the yarn storage roller 41 among the positions facing the yarn storage roller 41, or may be arranged in the vicinity of the suction device 49 (in the vicinity of the suction device 49). The position adjacent to the yarn storage roller 41 in the direction in which the axial direction of the yarn storage roller 41 intersects). In addition, the yarn end 7t of the spun yarn 7 on the package 9 side detected by the detection device 81 is not only the portion of the spun yarn 7 where the spun yarn 7 is completely terminated, but also includes this portion and its vicinity.

The spinning unit 1 includes a capturing device 83 that captures the spun yarn 7 on the downstream side of the yarn storage device 17 (the yarn storage roller 41 ). The catching device 83 is arranged between the yarn storage device 17 and the winding device 21 in the yarn traveling direction. In the present embodiment, as shown in FIG. 1 , the catching device 83 is arranged at a position near the detection device 81 between the yarn storage device 17 and the threading device 19 in the yarn traveling direction. The catching device 83 is disposed nearer to the yarn storage device 17 than the winding device 21 in the yarn traveling direction.

When the spun yarn 7 is broken on the upstream side of the yarn storage device 17 in the yarn traveling direction, the catching device 83 sucks and catches the yarn end 7t of the spun yarn 7 on the package 9 side. When the catching device 83 sucks and catches the yarn end 7t, the yarn end 7t may not initially suck the part where the spun yarn 7 has completely ended.

The capturing device 83 includes a pipe 85 . In the present embodiment, the capture device 83 further includes an air intake device 87 that generates a suction airflow by supplying compressed air.

The tube 85 has a cylindrical shape. The pipe 85 is connected to the suction source 75 as a negative pressure source. Therefore, the trapping device 83 can generate the suction airflow inside the pipe 85 . A suction device 87 is provided at one end portion in the longitudinal direction of the pipe 85 . The suction device 87 has a catching opening 89 for sucking the yarn end 7t of the spun yarn 7 on the package 9 side. The catching opening 89 is arranged to open toward the yarn passage (path 111 of the spun yarn 7 in FIG. 5 ) formed between the yarn storage device 17 and the winding device 21 . In addition, the relative position of the catching opening 89 with respect to the yarn passage is not particularly limited, as long as it is located in the vicinity of the yarn passage on the downstream side of the yarn storage roller 41 . In the present embodiment, the catching opening 89 is fixedly provided in the spinning unit 1 . Specifically, the spinning machine is provided with a frame not shown in the figure for attaching the spinning unit 1 and the like. The tube 85 is fixed to the frame. Instead of being directly fixed to the frame, the tube 85 can also be indirectly fixed relative to the frame via other components. Thereby, the structure in which the opening 89 for capture|acquisition is fixed can be implement|achieved.

The compressed air generated by the compressed air source 91 is supplied to the suction device 87 . The suction device 87 discharges the compressed air from the ejection holes (not shown), so that not only the suction air flow generated by the suction source 75 but also additional suction air flow can be generated in the capturing opening 89 . A second valve 93 is provided in the middle of the compressed air supply path connecting the air intake device 87 and the compressed air source 91 . The second valve 93 is a solenoid valve for switching whether or not to supply compressed air to the air intake device 87 . Opening and closing of the second valve 93 is controlled by the unit controller 25 . By performing control to open the second valve 93 , a suction airflow is generated in the suction device 87 (capturing device 83 ), and by performing control to close the second valve 93 , the suction airflow in the suction device 87 is stopped.

In this way, in the present embodiment, the capture device 83 is configured to include the suction device 87 . Thereby, by the flow of the air generated by the jet air in the catching device 83, a strong suction airflow is generated in the catching opening 89, and the yarn end 7t of the spun yarn 7 on the package 9 side can be sucked and held securely. The catching device 83 only needs to be capable of catching the yarn end 7t of the spun yarn 7 on the package 9 side with an attractive force of sufficient strength, and the suction device 87 does not necessarily need to be provided, and the suction device 87 may not be provided.

The timing at which the suction device 87 is actuated so that the catching device 83 catches the yarn end 7t of the spun yarn 7 on the package 9 side is not particularly limited. For example, the unit controller 25 may actuate the suction device 87 when it is determined that the amount of the spun yarn 7 remaining on the storage roller 41 is less than a predetermined amount. The determination of the amount of the spun yarn 7 remaining on the yarn storage roller 41 can be performed based on the detection result of the yarn detection sensor 47 .

In the present embodiment, when the spun yarn 7 on the package 9 side is wound around the package 9 , the unit controller 25 controls the rotation of the package 9 . Specifically, it is as follows. By the rotation of the package 9 in the forward rotation direction, as described above, the spun yarn 7 (spun yarn 7 on the package 9 side) is unwound from the yarn storage roller 41 to the downstream side. The yarn end 7t of the spun yarn 7 is captured by the capturing device 83 shortly after the time when the yarn end 7t of the spun yarn 7 leaves the yarn storage roller 41 by unwinding the spun yarn 7 from the yarn storage roller 41 . As a result, when the detection device 81 no longer detects the spun yarn 7, the unit controller 25 stops the rotation of the package 9 in the forward rotation direction. By this control, the rotation in the forward rotation direction of the package 9 can be stopped before the yarn end 7t is completely wound around the package 9 .

After that, the package 9 is temporarily rotated in the reverse direction. Thereby, a part of the spun yarn 7 is unwound from the package 9 and sucked into the catching device 83 . The spun yarn 7 sucked into the catching device 83 is discarded during the threading process by the threading device 19 . How the package 9 is rotated in the reverse direction is adjusted according to the length of the yarn defect contained in the spun yarn 7 detected by the yarn monitoring device 15 . Accordingly, when the yarn defect included in the spun yarn 7 on the package 9 side is short, the length of the spun yarn 7 sucked and removed by the catching device 83 can be shortened by reducing the amount of rotation of the package 9 in the reverse direction. The amount of the discarded spun yarn 7 can be reduced.

When the package 9 is temporarily rotated in the reverse direction, if the suction force of the catching device 83 is insufficient, the spun yarn 7 on the package 9 side may not be unwound or separated from the surface of the package 9 to be pasted. . When the package 9 is rotated in the reverse direction in this state, reverse winding occurs in which the spun yarn 7 is wound in a direction opposite to the normal direction. The reverse winding causes the failure of the wiring process by the wiring device 19 and the deterioration of the quality of the package 9 . However, in the present embodiment, by operating the suction device 87 in the catching device 83, the spun yarn 7 can be strongly sucked from the catching opening 89 and pulled. As a result, the occurrence of reverse winding can be prevented.

In the present embodiment, the first spray device 97 is provided on the downstream side of the yarn storage roller 41 . The first jetting device 97 is arranged at a position facing the catching device 83 (the catching opening 89 ) so as to sandwich the path 111 of the spun yarn 7 . In other words, the first ejection device 97 and the capture device 83 (the capture opening 89 ) are provided on a straight line. Therefore, the first spray device 97 can spray air to the capture device 83 (the opening 89 for capture). The air jetted from the first jetting device 97 flows in the direction of the arrow 99 in FIG. 5 toward the capturing opening 89 of the capturing device 83 . Thereby, since the vicinity of the yarn end 7t of the spun yarn 7 on the package 9 side is blown toward the catching opening 89, the catching device 83 can more reliably catch the yarn end 7t. The timing of the injection by the first injection device 97 is not particularly limited. This time may be, for example, the time when the yarn detection sensor 47 no longer detects the spun yarn 7 , that is, the time when the spun yarn 7 is about to disappear from the yarn storage roller 41 , or the time when the catch device 83 operates the suction device 87 .

The compressed air generated by the compressed air source 101 is supplied to the first injection device 97 . The first jetting device 97 jets the compressed air from the jetting hole toward the yarn passage (the catching opening 89 of the catching device 83 ). A third valve 103 is provided in the middle of the compressed air supply path connecting the first injection device 97 and the compressed air source 101 . The third valve 103 is a solenoid valve for switching whether or not to supply compressed air to the first injection device 97 . The opening and closing of the third valve 103 is controlled by the unit controller 25 . By performing control to open the third valve 103 , the compressed air is injected into the first injection device 97 , and by performing the control to close the third valve 103 , the injection of the compressed air is stopped. Further, the compressed air source 101 and the compressed air source 91 may not be provided separately, and the spinning unit 1 may be configured to supply compressed air from a single compressed air source.

In this embodiment, as shown in FIG. 1 , the second injection device 105 is provided on the downstream side of the first injection device 97 . The second spray device 105 is fixedly installed in the spinning unit 1 or a work cart (not shown). When the spun yarn 7 is disconnected between the yarn storage device 17 and the winding device 21 in the yarn traveling direction, the second injection device 105 guides the yarn end 7t of the spun yarn 7 on the package 9 side toward the catching device 83 Spray compressed air. The second injection device 105 can be configured in the same manner as the first injection device 97 . Accordingly, when the spun yarn 7 is disconnected on the downstream side in the yarn advancing direction of the yarn storage device 17 due to a failure of the yarn threading device 19, the package 9 is rotated in the reverse direction and the second ejection The device 105 injects compressed air, and the catching device 83 can catch the yarn end 7t of the spun yarn 7 on the package 9 side. As a result, the yarn end 7t of the spun yarn 7 is in a state of being guided to a position where it can be spliced by the splicing device 19 . Therefore, the processing of the spun yarn 7 on the package 9 side can be performed with a simple structure. The package 9 is rotated in the reverse direction by the winding device 21 at the same time or substantially the same time as the injection of the compressed air from the second injection device 105 is started. In addition, the second injection device 105 may be omitted.

As described above, the spinning unit 1 included in the spinning machine of the present embodiment includes the yarn feeding device 23 , the winding device 21 , the yarn storage device 17 , the detection device 81 , the capturing device 83 , and the first spray device 97 . The yarn feeding device 23 can supply the spun yarn 7 . The winding device 21 winds the spun yarn 7 supplied from the yarn feeding device 23 to form the package 9 . The yarn storage device 17 is arranged in the middle of a yarn path (yarn traveling path) formed between the yarn feeding device 23 and the winding device 21 . The yarn storage device 17 includes a yarn storage roller 41 that winds and stores the spun yarn 7 supplied from the yarn supplying device 23 . The detection device 81 detects the yarn end 7t of the spun yarn 7 on the package 9 side when the spun yarn 7 is broken on the upstream side of the yarn storage device 17 in the yarn traveling direction. The catching device 83 catches the yarn end of the yarn on the package 9 side on the downstream side of the yarn storage device 17 (the yarn storage roller 41 ). The first spray device 97 sprays air toward the capture device 83 . The winding of the spun yarn 7 on the package 9 side to the package 9 is stopped based on the detection result of the detection device 81 so that the yarn end 7t of the spun yarn 7 on the package 9 side is stopped in a state where it can be caught by the catching device 83 Location.

In this way, the detection device 81 detects the yarn end 7t of the spun yarn 7 on the package 9 side, whereby the rotation of the package 9 can be easily stopped. The yarn end 7t of the spun yarn 7 on the package 9 side can become a passing catcher 83 The location of the captured state. Therefore, when the spun yarn 7 is broken on the upstream side in the yarn traveling direction of the yarn storage device 17, the spun yarn 7 on the package 9 side can be handled with a simple structure. The yarn end 7t of the spun yarn 7 on the package 9 side can be guided toward the catching device 83 by the air jetted from the first jetting device 97 . Therefore, the yarn end 7t can be surely caught by the catching device 83 .

In the spinning machine of the present embodiment, the detection device 81 is a sensor arranged on the downstream side in the yarn traveling direction with respect to the yarn storage roller 41 .

Thereby, it can be detected that the yarn end 7t of the spun yarn 7 on the package 9 side reaches the downstream side of the yarn storage roller 41 .

In the spinning machine of the present embodiment, the above-mentioned sensor as the detection device 81 is a reflection-type sensor.

Thereby, the yarn end 7t of the spun yarn 7 on the package 9 side can be easily detected.

In the spinning machine of the present embodiment, the capture device 83 is configured to include an air intake device 87 that generates a suction flow by supplying compressed air.

Thereby, the spun yarn 7 can be strongly sucked in the catching device 83 by the flow of the air by the jet air. Therefore, when the package 9 is rotated in the reverse direction in order to unwind the spun yarn 7 from the package 9, it is possible to prevent the spun yarn 7 on the package 9 side from being wound in the opposite direction to the package 9. Rewind.

In the spinning machine of the present embodiment, the first jetting device 97 is disposed on the opposite side of the catching device 83 across the path 111 of the spun yarn 7 which is a part of the yarn traveling path.

Thereby, the yarn end 7t can be surely caught by the catching device 83 .

In the spinning machine of the present embodiment, the catching device 83 is provided with a tubular tube 85 having a catching opening 89 formed at the front end thereof. The catch opening 89 is fixedly provided. The tube 85 is connected to the suction source.

Thereby, a simple structure of the capturing device 83 can be realized.

The spinning machine of the present embodiment includes a guide 55 . The guide 55 is arranged on the downstream side of the yarn storage roller 41 , and guides the spun yarn 7 wound around the package 9 . The detection device 81 is arranged on the downstream side of the guide 55 . The detection device 81 detects the spun yarn 7 wound on the package 9 .

Thereby, since the yarn traveling path is stabilized by the guide 55 , the spun yarn 7 on the downstream side of the yarn storage roller 41 can be reliably detected by the detection device 81 .

The spinning machine of the present embodiment includes a stitching device 19 . When the spun yarn 7 is disconnected on the upstream side of the yarn storage device 17 in the yarn traveling direction, the stitching device 19 performs stitching processing for connecting the spun yarn 7 on the yarn feeding device 23 side and the spun yarn 7 on the package 9 side.

Thereby, even when the spun yarn 7 is disconnected on the upstream side of the yarn storage device 17 in the yarn traveling direction, the winding process of the package 9 can be resumed by performing the stitching process.

In the spinning machine of the present embodiment, the catching device 83 is arranged between the yarn storage device 17 and the threader 19 in the yarn traveling direction. The catching device 83 is disposed nearer to the yarn storage device 17 than the winding device 21 in the yarn traveling direction.

Thereby, when the spun yarn 7 on the upstream side in the yarn traveling direction of the yarn storage device 17 is broken, the spun yarn 7 on the package 9 side can be easily captured by the capturing device 83 located near the yarn storage device 17 . In addition, since the spun yarn 7 on the package 9 side is caught by the catching device 83 between the yarn storage device 17 and the yarn stitching device 19 , the caught spun yarn 7 on the package 9 side can be smoothly stitched by the stitching device 19 .

The spinning machine of the present embodiment includes a second jetting device 105 . When the spun yarn 7 is broken on the downstream side in the yarn traveling direction of the yarn storage device 17 , the second spray device 105 sprays air so as to guide the yarn end 7 t of the spun yarn 7 on the package 9 side toward the catching device 83 . The second jetting device 105 is arranged at a position near the winding device 21 on the upstream side of the winding device 21 , and the jetting hole of the second jetting device 105 is provided so as to correspond to the capturing position of the capturing device 83 .

Accordingly, even if the yarn end 7t of the spun yarn 7 on the package 9 side is located downstream of the catching device 83 , the spun yarn 7 on the package 9 side can be pulled out from the package 9 and caught by the catching device 83 .

The spinning machine of the present embodiment includes a yarn monitoring device 15 capable of detecting a yarn defect included in the spun yarn 7 supplied from the yarn feeding device 23 . When the yarn monitoring device 15 detects a yarn defect, the spun yarn 7 is broken on the upstream side in the yarn traveling direction of the yarn storage device 17 . After the spun yarn 7 on the side of the package 9 is caught by the catching device 83, the winding device 21 rotates the package 9 in the opposite direction to the winding direction of the package 9 so that the spun yarn 7 on the package 9 side is removed by the catching device 83. The spun yarn 7 of the length required for the yarn defect in the spun yarn 7.

Thereby, the yarn defect detected by the yarn monitoring device 15 can be reliably removed by the capturing device 83 .

As mentioned above, although the preferred embodiment of this invention was described, the said structure can be changed as follows, for example. The above-described embodiment and the following modifications can be appropriately combined.

Instead of the suction device 49, a jetting device (yarn acting part) for jetting air around the yarn storage roller 41 may be provided. For example, the spray device may be configured to spray air in the tangential direction of the yarn storage roller 41 in the above-mentioned most upstream portion 80 . The jetting direction of the air may be the same as the direction of the suction airflow in the suction port 71 shown in FIG. 3 , or may be different. Among the spun yarns 7 on the package 9 side, the portion on the upstream side of the yarn storage roller 41 is blown along the jet flow. Therefore, the yarn end 7a in the free state can not come into contact with the spun yarn 7 already wound in the storage portion 41a. In this way, the spun yarn 7 can be substantially guided although the ejection device is gentler than the suction device 49 . By spraying the air from the spraying device, resistance against the traveling of the spun yarn 7 in the direction wound around the yarn storage roller 41 can also be applied.

Instead of the suction device 49 , a suitable clamping device (yarn action portion) configured so as to be able to clamp the yarn end 7t of the spun yarn 7 on the package 9 side may be provided. The spun yarn 7 may be sandwiched between arms arranged in a pair or between rollers arranged in a pair. The clamping device can restrain the spun yarn 7 from moving by clamping the spun yarn 7 . For example, by providing a damper on the shaft of the roller, resistance against the traveling of the spun yarn 7 in the direction wound around the yarn storage roller 41 can also be applied.

When a roller pair is provided instead of the suction device 49 , the roller pair can also perform a pull-out operation for pulling out the spun yarn 7 from the spinning device 13 . At this time, the yarn storage roller 41 stores the spun yarn 7 drawn out by the roller pair.

Instead of the suction device 49, a brush, comb teeth, or the like (yarn action part) for hooking the spun yarn 7 may be provided. By hooking the spun yarn 7 to a brush or the like, the spun yarn 7 can be restrained from moving.

In the case where the spinning unit 1 is provided with the above-described jetting device, roller pair, brush, comb teeth, etc. as the yarn acting portion, the yarn storage roller 41 for sucking the spun yarn 7 through the suction port 71 of the suction device 49 is reversed in the reverse direction. The rotation of the direction can also be omitted. At this time, after the spun yarn 7 is broken, the rotation of the yarn storage roller 41 and/or the rotation of the package 7 may not be temporarily stopped in association with the operation of the yarn acting member.

The detection device 81 may be a sensor provided at the end of the yarn storage roller 41 on the downstream side in the yarn traveling direction relative to the axial center of the yarn storage roller 41 with respect to the outer peripheral surface of the yarn storage roller 41, and arranged to face the end. The sensor is arranged at a position facing the roller surface of the yarn storage roller 41 on the downstream side of the yarn traveling from the center portion in the axial direction. In the case where the spinning unit 1 is provided with a restriction unit that restricts the yarn passage of the spun yarn 7 traveling from the yarn storage roller 41 via the flyer 45, the restriction unit may pass through the restriction unit before the sensor detects the yarn end 7t. Limit the yarn passage. The restricting means may be, for example, a member provided in the vicinity of the flyer 45 and capable of stopping the rotation of the flyer 45 of the yarn storage device 17 . By restricting the yarn passage by the restricting unit, the yarn end 7t can be stably detected by the sensor.

The detection device 81 may be provided in a region of the yarn storage roller 41 on the upstream side in the yarn traveling direction relative to the outer peripheral surface of the yarn storage roller 41 (for example, on the upstream side in the yarn traveling direction in the storage portion 41a) end), a sensor arranged to face the outer peripheral surface of the yarn storage roller 41 .

The yarn detection sensor 47 that detects the stored yarn amount of the yarn storage roller 41 may also serve as the detection device 81 . As described above, the yarn detection sensor 47 detects whether or not the stored yarn amount wound around the yarn storage roller 41 is a predetermined amount or more. Here, as shown in FIG. 3, the case where the spun yarn 7 is broken on the upstream side of the yarn storage device 17 in the yarn traveling direction is considered. If the length of the spun yarn 7 sucked into the suction device 49 is small, for example, when the length of the spun yarn 7 sucked into the suction device 49 is smaller than the yarn storage roller 41, the yarn storage amount is detected by the yarn detection sensor 47 and the end of the spun yarn 7 is detected by the yarn detection sensor 47 (eg The regions of the spun yarns 7 in the vicinity of reference numeral 7c) in Fig. 3 are substantially the same.

The detection device 81 may also be a line sensor. The line sensor is arranged at a position adjacent to the yarn storage roller 41 along the axial direction of the yarn storage roller 41 . The line sensor faces the outer peripheral surface of the storage portion 41a. The line sensor includes a plurality of detection elements arranged in a direction parallel to the axial direction of the yarn storage roller 41 . The line sensor is provided so as to be able to detect the position included in the region of the yarn storage roller 41 on the downstream side in the yarn traveling direction from the axial center portion. If all the detection elements do not detect the spun yarn 7 , it can be determined that the yarn end 7 t has passed through the outer peripheral surface of the yarn storage roller 41 .

The line sensor as the detection device 81 may be provided so as to be able to detect the position included in the region on the upstream side in the yarn traveling direction from the axial center portion in the storage portion 41 a of the yarn storage roller 41 . In this configuration, the line sensor can detect the yarn storage amount of the yarn storage roller 41 . Similar to the above-described configuration in which the yarn detection sensor 47 also serves as the detection device 81 , the detection of the stored yarn amount by the thread sensor is substantially the same as the detection of the spun yarn 7 in the vicinity of the end portion of the spun yarn 7 .

The detection device 81 may be a sensor provided in the vicinity of the suction port 71 of the suction device 49 . When the spun yarn 7 is completely unwound from the yarn storage roller 41 , the yarn end 7 c is pulled out from the suction port 71 . Therefore, by arranging the sensor in the vicinity of the suction port 71, the yarn end 7t (7c) can be detected stably.

When the detection device 81 is provided so as to face the outer peripheral surface of the yarn storage roller 41, for example, the sensor located at the position of the reference numeral 81 in FIG. 5 may be omitted. If not omitted, the spun yarn can be detected for other appropriate purposes. 7 yarn detection sensors to use.

In the above-described embodiment, when the yarn monitoring device 15 detects a yarn defect, the spinning in the spinning device 13 is stopped, and the spun yarn 7 is cut. Instead of this, the spun yarn 7 may be cut by a cutter provided upstream of the yarn storage device 17 .

In the case where a plurality of spinning units 1 are provided, instead of the configuration in which each spinning unit 1 is provided with the wiring device 19 , it is also possible to provide a structure capable of traveling with respect to the spinning units 1 and stopping at a position relative to the spinning unit 1 as necessary. The structure of the wiring trolley for wiring at the work position.

In the above-described embodiment, the spinning unit 1 has a layout in which the yarn passages formed between the yarn feeding device 23 and the winding device 21 are arranged to extend from bottom to top. However, the present invention can also be applied to a spinning unit 1 in a layout in which the yarn passages extend from top to bottom.

In the above-mentioned embodiment, although the spinning machine is an air spinning machine (air-jet spinning machine), it may be an open-end spinning machine.

In the above-described embodiment, the spun yarn 7 on the package 9 side may be connected to the spun yarn 7 supplied from the yarn feeding device 23 via the yarn connecting device 19 . However, the broken spun yarn 7 may be brought into a continuous state again by a known piecing method.

In view of the above teachings, it will be apparent that the present invention may take many modifications and variations. Therefore, it is to be understood that within the scope of the appended claims, the present invention may be practiced in methods other than those described in this specification.

Claims (13)

1. a spinning machine, is characterized in that, has: a yarn feeding device capable of feeding yarn; a winding device that winds the yarn supplied from the yarn feeding device to form a package; a yarn storage device, which is arranged in the middle of a yarn traveling path formed between the yarn feeding device and the winding device, and has a yarn storage roller that winds and stores the yarn supplied from the yarn feeding device; a detection device for detecting the yarn end of the yarn on the package side when the yarn is disconnected on the upstream side of the yarn storage device in the yarn traveling direction; a catching device that catches the yarn end of the yarn on the package side on the downstream side of the yarn storage device; and a first spray device that sprays air towards the capture device, The winding of the yarn on the package side is stopped based on the detection result of the detection device so that the yarn end of the yarn on the package side is stopped at a position where it can be caught by the catching device . 2. spinning machine according to claim 1 is characterized in that, The detection device is a sensor configured to detect the outer peripheral surface of the storage roller. 3. spinning machine according to claim 2 is characterized in that, The sensor is a reflective sensor. 4. The spinning machine according to claim 2 or 3, characterized in that, The detection device is a sensor configured to detect a region on the downstream side of the yarn storage roller in the direction of travel of the yarn, The spinning machine further includes a restricting unit that restricts the yarns included in the yarn traveling path at a timing before the sensor detects the yarn end of the yarn on the package side. The yarn channel of the yarn unwound from the yarn storage roller. 5. spinning machine according to claim 2 is characterized in that, The detection device is a line sensor. 6. The spinning machine according to any one of claims 1 to 5, characterized in that: The capture device is configured to include an air intake device that generates a suction flow by supplying compressed air. 7. The spinning machine according to any one of claims 1 to 6, characterized in that: The first spraying device is disposed on the opposite side of the catching device across a part of the yarn traveling path. 8 . The spinning machine according to claim 1 , wherein: 8 . The catching device includes a cylindrical tube having a catching opening formed at the front end, The catching opening is fixedly arranged, The tube is connected to a suction source. 9. The spinning machine according to any one of claims 1 to 8, comprising: a guide member disposed on the downstream side of the storage roller and guiding the yarn wound around the package; and The yarn detection sensor is disposed on the downstream side of the guide member, and detects the yarn wound on the package. 10 . The spinning machine according to claim 1 , wherein: 10 . The spinning machine is provided with a stitching device for stitching the yarn on the side of the yarn feeding device to the winding when the yarn on the upstream side of the yarn storage device is disconnected in the direction of travel of the yarn. Wire handling for yarn connections on the side of the mount. 11. The spinning machine according to claim 10, characterized in that, The catching device is arranged between the yarn storage device and the threading device in the yarn advancing direction, and is arranged nearer the yarn storage device than the winding device in the yarn advancing direction. 12. The spinning machine according to any one of claims 1 to 11, characterized in that: The spinning machine is provided with a second jetting device that, when the yarn on the downstream side of the yarn storage device is disconnected in the yarn traveling direction, is adapted to separate the yarn on the package side. Air is sprayed in such a way that the yarn ends are directed towards the catching device. 13. The spinning machine according to any one of claims 1 to 12, characterized in that: The spinning machine includes a yarn monitoring device capable of detecting a yarn defect included in the yarn supplied from the yarn feeding device, When the yarn monitoring device detects a yarn defect, the yarn is disconnected on the upstream side in the yarn traveling direction from the yarn storage device, and the yarn is disconnected. After the yarn on the package side is caught by the catching device, the winding device rotates the package in a direction opposite to the winding direction of the package to remove the yarn by the catching device. A yarn of a length required to remove the yarn defect among the captured yarns.

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