JP2011173674A - Yarn winding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a yarn winding machine capable of preventing a yarn part remaining in a yarn storage roller after cutting yarn from being wound on a package when resuming winding after piecing. <P>SOLUTION: A spinning frame 1 includes a winding device 12, a yarn clearer 11, a cutter 10, a looseness removing device 8, a piecing device 92 and a machine base control part 96. The looseness removing device 8 includes a looseness removing roller 30 and a yarn detecting sensor for detecting yarn of a surface of the looseness removing roller 30. The machine base control part 96 determines whether or not to allow the piecing device 92 to perform piecing based on a detecting result of the yarn detecting sensor 34 when the yarn is cut by the cutter 10 when a yarn defect is detected by the yarn clearer 11. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a yarn winding machine that winds a traveling yarn to form a winding package.

  2. Description of the Related Art Conventionally, in a field of a yarn winding machine that winds a traveling yarn to form a package, there is one having a yarn storage device that temporarily stores a yarn wound around a winding device. For example, the spinning machine described in Patent Document 1 includes a spinning device, a winding device that winds a yarn fed from the spinning device, a yarn clearer that detects a yarn defect, and a yarn that is cut when a yarn defect is detected. Between the winding device and the cutter, the yarn splicing device that connects the yarn end on the upstream side (spinning device side) and the yarn end on the downstream side (winding device side) after the yarn is cut by the cutter And a yarn storage device (yarn slack eliminating device).

  The yarn accumulating device has a yarn accumulating roller (loosening roller) around which the yarn is wound, and a sensor (winding amount sensor) for detecting the amount of yarn wound around the yarn accumulating roller. When a predetermined amount of yarn is wound around the yarn accumulating roller, the slack of the yarn is eliminated and the yarn tension is stabilized, so that a high-quality package can be formed in the winding device.

Japanese Patent Laying-Open No. 2009-224201 (FIG. 1, paragraph 0025)

  By the way, when a yarn defect is detected and the yarn is cut by the cutter, the yarn on the package side wound around the yarn accumulating roller located on the downstream side of the cutter is unwound from the yarn accumulating roller. Is wound on the package as it is. However, the yarn portion on the package side has a yarn defect, and the strength is locally low in the yarn defect portion. May remain on the yarn accumulating roller. Then, when such a yarn portion remains on the yarn accumulating roller, when the yarn end on the upstream side and the yarn end on the downstream side of the cutter are spliced and the winding of the yarn is resumed, the yarn portion is The yarn sent from the upstream side is sent to the winding device and wound on the package, and the quality of the package is deteriorated.

  The yarn storage device of Patent Document 1 described above has a sensor that detects the winding amount of the yarn storage roller during winding of the package, but remains on the yarn storage roller when the yarn defect is detected and the yarn is cut. There is no disclosure or suggestion that there is a possibility that a small amount of yarn portion to be wound around the package and a solution thereof.

  An object of the present invention is to provide a yarn winding machine that can prevent a yarn portion remaining on a yarn accumulating roller after yarn cutting from being wound around a package when winding is resumed after yarn joining. is there.

Means for Solving the Problems and Effects of the Invention

A yarn winding machine according to a first aspect of the present invention is a winding device that winds a traveling yarn to form a package, a yarn defect detection device that detects a defect in the yarn wound around the winding device, and the yarn defect detection. A cutting device that cuts a yarn when a yarn defect is detected by the device, a yarn joining device that connects an upstream yarn end and a downstream yarn end after yarn cutting by the cutting device, the winding device, and the A yarn storage device that is disposed between the cutting device and temporarily stores the yarn wound around the winding device; and a control device that controls the yarn winding machine,
The yarn accumulating device includes a yarn accumulating roller that is configured to be freely rotatable and on which a yarn is wound, and a yarn detecting sensor that detects a yarn on the surface of the yarn accumulating roller,
The control device determines whether or not to cause the yarn joining device to perform yarn joining based on a detection result of the yarn detection sensor when the yarn is cut by the cutting device. It is.

  According to the present invention, when a yarn defect is detected by the yarn defect detection device and the yarn is cut by the cutting device, it is detected by the yarn detection sensor that a small amount of yarn portion remains on the surface of the yarn storage roller. In such a case, by preventing the yarn joining by the yarn joining device, it is possible to prevent the remaining yarn portion from being wound on the package when the package winding is resumed.

  A yarn winding machine according to a second aspect of the invention is characterized in that, in the first aspect of the invention, the yarn winding machine has a fluid spraying device that sprays a fluid onto the surface of the yarn accumulating roller after the yarn is cut by the cutting device.

  According to this configuration, even when the yarn portion remains at a position away from the detection position of the yarn detection sensor, the yarn portion is moved to the yarn detection position of the yarn detection sensor by the flow of the fluid sprayed from the fluid spraying device. Can be made. Alternatively, it is also possible to remove the yarn portion remaining on the surface of the yarn accumulating roller by spraying a fluid onto the surface of the yarn accumulating roller with a fluid spraying device.

A yarn winding machine according to a third aspect of the present invention includes, in the second aspect of the invention, a yarn splicing carriage provided with the yarn splicing device and the fluid spraying device.
When the yarn is cut by the cutting device and the yarn detection sensor does not detect the yarn on the surface of the yarn accumulating roller, the control device causes the yarn joining cart to approach the yarn accumulating roller. ,
Further, when the fluid is sprayed from the fluid spraying device of the yarn splicing carriage onto the surface of the yarn storage roller, and when the yarn on the surface of the yarn storage roller is not detected by the yarn detection sensor, The yarn splicing device causes the yarn splicing to be performed.

  According to the present invention, when the yarn is cut by the cutting device, if the yarn on the surface of the yarn accumulating roller is detected by the yarn detecting sensor, it is determined that the yarn joining should not be performed and the yarn joining cart is moved. Only when the yarn is not detected, the yarn joining cart is brought close to the yarn accumulating roller. However, in the above-described yarn detection before the yarn joining cart is moved, it may be considered that the yarn is not detected by the yarn detection sensor because the yarn remains at a position away from the yarn detection position of the yarn detection sensor. . Therefore, only when the fluid is sprayed from the fluid spraying device provided in the yarn splicing carriage toward the yarn accumulating roller and the yarn is not detected by the yarn detecting sensor even during the fluid spraying, the yarn splicing device is connected to the yarn splicing device. To do.

  In a yarn winding machine according to a fourth invention, in the third invention, the fluid spraying device is directed from the position away from the yarn detection position of the yarn detection sensor to the yarn detection position on the surface of the yarn accumulating roller. Then, the fluid is sprayed on the yarn accumulating roller so that the fluid flows.

  According to this configuration, even when the yarn portion remains on the surface of the yarn accumulating roller at a position away from the yarn detection position of the yarn detection sensor, the yarn portion is detected by the fluid sprayed from the fluid spraying device. Since the sensor moves to the yarn detection position, the yarn portion remaining on the surface of the yarn accumulating roller is reliably detected.

  The yarn winding machine according to a fifth aspect of the present invention is the yarn winding machine according to the fourth aspect, comprising two fluid spraying devices that spray fluid from both ends in the rotation axis direction to the yarn accumulating roller, and the two fluids The position of the fluid ejecting portion of the spraying device is shifted with respect to the circumferential direction of the yarn accumulating roller.

  When fluids are sprayed from the two fluid spraying devices from both ends to the yarn accumulating roller, if the circumferential positions of the fluid ejecting units of the two fluid spraying devices are the same, the two fluid ejecting units The fluid collides with the roller surface, and the yarn remaining on the roller surface cannot move. In the present invention, since the positions of the fluid ejecting portions of the two fluid spraying devices are shifted with respect to the circumferential direction of the roller, the yarn remaining on the surface of the roller can be moved to the yarn detection position of the yarn detection sensor. .

  The yarn winding machine according to a sixth aspect of the present invention is the yarn winding machine according to the fifth aspect, wherein the control device rotates the yarn storage roller at the same time when fluid is sprayed from the two fluid spraying devices toward the yarn storage roller. It is characterized by making it.

  When the yarn accumulating roller is rotated in a state where the fluid is sprayed from the fluid ejecting portions of the two fluid spraying devices that are displaced in the circumferential direction with respect to the yarn accumulating roller, the yarn accumulating roller accompanies the rotation. The part where the fluid collides (the part receiving the force from the fluid) of the yarn part remaining on the roller continuously changes. Then, the yarn portion vibrates in the direction of the rotation axis of the roller, and is easily detected by the yarn detection sensor.

  The yarn winding machine according to a seventh aspect of the present invention is the invention according to any one of the first to sixth aspects, wherein the yarn detection sensor is a reflective photosensor including a light emitting element and a light receiving element, and the light emitting element is The yarn accumulating roller is disposed so as to irradiate light at a predetermined position in the middle of the rotational axis of the yarn accumulating roller, and the yarn detecting sensor is configured to detect the predetermined amount of the yarn accumulating roller during winding of the package by the winding device It is possible to detect whether the yarn is wound up to a position.

  According to this configuration, during the winding of the package, the photo sensor for detecting whether the yarn is wound up to a predetermined position of the yarn accumulating roller (whether a yarn of a predetermined amount or more is wound) is used as the yarn by the cutting device. It is also used as a yarn detection sensor for detecting the yarn remaining on the yarn accumulating roller after cutting. Accordingly, it is possible to detect the yarn portion remaining on the yarn accumulating roller at the time of yarn cutting without increasing the number of sensors.

It is a front view of the spinning machine concerning this embodiment. It is a side view of one spinning unit of the spinning machine of FIG. It is an enlarged view of a slack eliminating device (yarn accumulating device). It is a figure which shows a thread | yarn detection sensor, (a) is sectional drawing, (b) is a BB arrow directional view of (a). It is a figure which shows the relationship between the thread | yarn part of the slack removal roller surface, and the irradiation range of a thread | yarn detection sensor. It is a figure which shows roughly the positional relationship of the air injection part of a slack removal roller and two nozzles. It is a block diagram which shows the control structure of a spinning machine. It is a flowchart which shows the process of a spinning stop when a yarn defect is detected. It is a flowchart of a yarn splicing process.

  Next, an embodiment of the present invention will be described. FIG. 1 is a front view of a spinning machine according to this embodiment, and FIG. 2 is a side view of one spinning unit of the spinning machine. As shown in FIG. 1, a spinning machine 1 (yarn winding machine) includes a plurality of spinning units 2 arranged side by side, a yarn splicing carriage 3 configured to be able to run along the arrangement direction of the spinning units 2, and a blower. A box 4 and a motor box 5 are provided.

  As shown in FIGS. 1 and 2, each spinning unit 2 includes a draft device 6, a spinning device 7, a cutter 10 (cutting device), a yarn clearer 11 (yarn defect detecting device), and a slack eliminating device 8 ( A yarn storage device), a winding device 12 and the like. In the following description, “upstream” and “downstream” mean upstream and downstream in the running direction of the yarn during spinning.

  The draft device 6 is provided in the vicinity of the upper end of the casing 13 of the spinning machine 1, and the sliver 14 sent to the draft device 6 is drawn (drafted) by the draft device 6 to become a fiber bundle 15. 15 is spun by the spinning device 7 to generate a spun yarn 16. Further, the spun yarn 16 is wound by the downstream winding device 12 to form a package 17.

  The draft device 6 includes four rollers, a back roller 22, a third roller 23, a middle roller 25 on which an apron belt 24 is mounted, and a front roller 26, which are sequentially arranged along the traveling direction of the sliver 14 (fiber bundle 15). It is configured. The apron belt 24 is hung on the middle roller 25 and the ten server 27, and when the ten server 27 is urged away from the middle roller 25, a predetermined tension is applied to the apron belt 24. Is granted.

  Although the detailed configuration of the spinning device 7 is not illustrated, in the present embodiment, a pneumatic type that generates a spun yarn 16 by twisting the fiber bundle 15 using a swirling airflow is adopted.

  A cutter 10 and a yarn clearer 11 are provided on the downstream side of the spinning device 7. The yarn clearer 11 is configured to monitor the thickness of the traveling spun yarn 16 and detect a fine yarn portion or a thick yarn portion (yarn defect) of the spun yarn 16. When the yarn clearer 11 detects a yarn defect, the yarn clearer 11 transmits a yarn defect detection signal to the unit controller 21 (see FIG. 6). Upon receiving this yarn defect detection signal, the unit controller 21 immediately operates the cutter 10 to cut the spun yarn 16.

  Between the cutter 10 and the winding device 12, a slack eliminating device 8 is provided. The slack eliminating device 8 has a slack eliminating roller 30 (yarn accumulating roller). The spun yarn 16 generated by the spinning device 7 is wound around the slack eliminating roller 30 by a predetermined amount, thereby temporarily storing the spun yarn. It is configured to adjust the yarn tension. The slack eliminating roller 30 around which the yarn is wound is also actively driven to rotate, thereby having a function of pulling the spun yarn 16 from the spinning device 7 to the downstream side. Details of the slack eliminating device 8 will be described later. Further, a traveling sensor 28 that detects the spun yarn 16 traveling toward the winding device 12 is provided on the downstream side of the slack eliminating device 8.

  As shown in FIG. 1, the winding device 12 includes a winding drum 18 and a cradle 19 that rotatably supports a bobbin. The winding drum 18 rotates while being in contact with the surface of the bobbin (or the yarn layer wound around the bobbin), so that the spun yarn 16 traveling by rotating the bobbin is wound around the bobbin to form a package 17. .

  As shown in FIGS. 1 and 2, the yarn splicing carriage 3 includes a yarn splicing device 92, a suction pipe 93, and a suction mouth 94. As shown in FIG. 1, the yarn splicing cart 3 is provided so as to run on a rail 91 provided in the casing 13 of the spinning machine 1 main body. When yarn breakage or yarn cut occurs in a spinning unit 2, the yarn splicing carriage 3 travels to the spinning unit 2 and stops. The suction pipe 93 sucks and guides the yarn end (upstream yarn end) discharged from the spinning device 7 while sucking and guiding it to the yarn joining device 92 while turning in the vertical direction about the axis. The suction mouth 94 sucks and captures the yarn end (downstream yarn end) from the package 17 rotatably supported by the winding device 12 while turning in the vertical direction about the axis, and guides it to the yarn joining device 92. To do. The yarn joining device 92 performs yarn joining between the guided yarn ends. The suction pipe 93 and the suction mouth 94 are connected to a negative pressure source accommodated in the blower box 4 so as to obtain a suction force for sucking the yarn end from the negative pressure source.

  The blower box 4 is arranged on one end side in the arrangement direction with respect to a large number of spinning units 2, and the blower box 4 accommodates a negative pressure source constituted by a blower, a filter, and the like. The negative pressure source includes a suction pipe for cleaning (not shown) that sucks and removes yarn waste and cotton waste generated in the draft device 6 and the slack eliminating device 8, and the suction pipe 93 of the yarn splicing carriage 3 described above and A suction mouse 94 or the like is connected.

  The prime mover box 5 is arranged on the opposite side of the blower box 4 with respect to a large number of spinning units 2, and in the prime mover box 5, the front roller 26 and the middle roller 25 of the draft device 6 of the large number of spinning units 2. The motor which drives each is accommodated. The prime mover box 5 is provided with a machine control unit 96 having a control panel 151. The machine base control unit 96 transmits and receives signals to and from the unit control unit 21 of the spinning unit 2 and the yarn splicing cart 3, and performs operation control and state monitoring of each spinning unit 2 and the yarn splicing cart 3.

  Next, the slack eliminating device 8 will be described in detail. FIG. 3 is an enlarged view of the slack eliminating device 8. As shown in FIG. 3, the slack eliminating device 8 includes a slack eliminating roller 30 (yarn accumulating roller), a yarn hooking member 31, an upstream guide 32, a downstream guide 33, and a yarn detection sensor 34. Yes.

  The slack eliminating roller 30 is a metal cylindrical roller, is rotatably supported by a bracket 35 fixed to the casing 13 of the spinning machine 1, and is rotationally driven by a motor 36. The yarn hooking member 31 has a tip shape that can engage (hang) with the spun yarn 16. The yarn hooking member 31 is attached to the downstream end of the slack eliminating roller 30 and rotates integrally with the slack eliminating roller 30 so that the spun yarn 16 can be wound around the outer peripheral surface of the slack eliminating roller 30. It is configured.

  As shown in FIG. 3, both end portions in the axial direction of the slack eliminating roller 30 are formed in a tapered shape whose diameter continuously increases from the center side toward the end surface side. When the spun yarn 16 is wound from the end portion having a large diameter located on the upstream side, the spun yarn 16 wound by the tapered shape of the end portion is sent to the downstream side, and a predetermined amount of spun yarn 16 is fed to the roller 30. Is temporarily stored. As described above, when the spun yarn 16 is wound around the roller 30, fluctuations in upstream yarn tension are suppressed. Further, when the slack eliminating roller 30 is driven by the motor 36 and actively rotates, the wound spun yarn 16 is unwound from the tapered end portion on the downstream side, and the downstream winding device 12 is wound. Sent to. That is, the slack eliminating roller 30 also serves as a feed roller that supplies the spun yarn 16 fed from the spinning device 7 to the winding device 12.

  The upstream guide 32 is provided on the bracket 35 that supports the slack eliminating roller 30, and is disposed at a position slightly upstream of the slack eliminating roller 30. The upstream guide 32 appropriately guides the spun yarn 16 with respect to the outer peripheral surface of the slack eliminating roller 30 and also prevents the twist of the spun yarn 16 transmitted from the spinning device 7 from being transmitted to the downstream side. It also serves as a stop.

  Similarly to the upstream guide 32, the downstream guide 33 is also provided on the bracket 35, and is disposed at a position downstream of the slack eliminating roller 30. The downstream guide 33 guides the spun yarn 16 unwound from the slack eliminating roller 30 to the winding device 12.

  4A and 4B are diagrams showing the yarn detection sensor 34, where FIG. 4A is a cross-sectional view, and FIG. 4B is a cross-sectional view of the yarn detection sensor 34 of FIG. As shown in FIGS. 3 and 4, the yarn detection sensor 34 is a reflection type photosensor (photointerrupter) including a light emitting element 41 and a light receiving element 42 housed in cases 44a and 44b, respectively. On the surfaces (light emitting surface and light receiving surface) of the cases 44a and 44b on the slack eliminating roller 30 side, an opening 40a that allows light from the light emitting element 41 to pass therethrough and light that is reflected and incident is passed to the light receiving element 42. An opening 40b is formed. Thereby, the light irradiated to the outside from the light emitting element 41 through the opening 40a is reflected by the surface of the slack eliminating roller 30, and the reflected light is received by the light receiving element 42 through the opening 40b.

  Here, as shown in FIG. 4, the light emitting element 41 is arranged so as to irradiate light to a predetermined position in the central portion in the rotation axis direction of the slack eliminating roller 30, and the spun yarn 16 exists at this predetermined position. In some cases, light strikes the spun yarn 16 and is reflected. In this case, as compared with the case where light is directly reflected by the surface of the metal slack eliminating roller 30 without the spun yarn 16, the reflectance is low, and therefore the amount of light received by the light receiving element 42 is reduced. As a result, the spun yarn 16 is wound from a change in the amount of light received by the light receiving element 42 to a predetermined position (yarn detection position) on the outer peripheral surface of the central portion of the slack eliminating roller 30, and the spun yarn 16 exceeding a predetermined amount is wound. Whether it is stored or not can be detected.

  By the way, when a yarn defect is detected in the spun yarn 16 by the yarn clearer 11 and the spun yarn 16 is cut by the cutter 10, a very small amount of yarn portion remains on the slack eliminating roller 30 as follows. Can happen. After the spun yarn 16 is cut by the cutter 10, the yarn on the package 17 side is usually unwound from the slack eliminating roller 30 and wound around the package 17. However, if there is a yarn defect in the yarn portion on the package 17 side, the strength of the spun yarn 16 is locally low in the yarn defect portion. As a result, some yarn portions that are no longer wound on the package 17 may remain on the slack eliminating roller 30.

  As described above, when a very small amount of yarn (yarn waste) is present in the slack eliminating roller 30, the slack eliminating roller is used when the yarn joining by the yarn joining device 92 is performed and the winding of the package 17 is resumed. The yarn portion remaining in 30 moves to the package 17 together with the spun yarn 16 sent after resumption, and is mixed into the package 17 and the quality is deteriorated.

  Therefore, in this embodiment, after the spun yarn 16 is cut by the cutter 10, the yarn detection sensor 34 detects whether or not a small amount of the yarn portion 16a remains on the surface of the slack eliminating roller 30, and the detection thereof. Based on the result, whether or not the yarn joining by the yarn joining device 92 is possible (that is, whether or not the package winding can be resumed) is determined. The determination as to whether or not the yarn splicing is possible will be described in detail in the description regarding the control of the spinning machine 1 later.

  Even when the yarn portion 16a existing on the surface of the slack eliminating roller 30 is a small amount of yarn wound around the roller 30 once or twice, the light emitting element can be detected to such an extent that the yarn portion 16a can be detected. The size of the opening 40a of 41 is preferably determined. Specifically, as shown in FIG. 4, after the opening 40a is formed in a slit shape that is long in one direction, the irradiation range A on the slack eliminating roller 30 is limited by the opening 40a as shown in FIG. It is preferable that the width W1 in the short direction of the slit-shaped opening 40a is set so that the width W2 of the slit-shaped opening 40a is substantially the same as the thickness D of the spun yarn 16.

  By doing so, as shown in FIG. 5, even when the remaining yarn portion 16a is small, the portion occupied by the yarn portion 16a with respect to the irradiation range A of the light from the opening 40a becomes large, and a very small amount. The yarn portion 16a can be reliably detected. Since the light from the light emitting element 41 passes through the opening 40a and then reaches the surface of the slack eliminating roller 30 while spreading slightly to form the irradiation range A, the width W1 of the opening 40a is slightly smaller than the thickness D of the yarn. It is necessary to. That is, the relationship between the width W1 of the opening, the width W2 of the irradiation range A, and the thickness D of the spun yarn 16 is W1 <W2≈D.

  Further, when the longitudinal direction of the slit-shaped opening 40a and the yarn portion 16a of the spun yarn 16 to be detected are substantially parallel, the amount of yarn entering the irradiation range A increases, and the detection accuracy increases. Here, as shown in FIG. 3, when the spun yarn 16 is wound around the slack eliminating roller 30 during winding of the package 17, the spun yarn 16 is substantially parallel to the circumferential direction of the slack eliminating roller 30. And, when the spun yarn 16 on the package 17 side is further cut at the yarn defect portion after being cut by the cutter 10, there is a possibility that it remains in a state substantially parallel to the circumferential direction. Therefore, in order to more reliably detect the remaining yarn portion 16a, it is preferable that the longitudinal direction of the slit-shaped opening 40a is parallel to the circumferential direction of the slack eliminating roller 30.

  In this embodiment, as a sensor for detecting the spun yarn 16 remaining on the surface of the roller 30 when the yarn is cut, it is determined whether or not a predetermined amount or more of the yarn is wound around the slack eliminating roller 30 during winding of the package. The yarn detection sensor 34 for detection is also used. Thereby, the yarn portion 16a remaining on the slack eliminating roller 30 at the time of yarn cutting can be detected without increasing the number of sensors.

  After the spun yarn 16 is cut by the cutter 10, the yarn splicing carriage 3 including the yarn splicing device 92 moves to a position below the slack eliminating roller 30 of the spinning unit 2 and the sliver 14 is stretched by the draft device 6. (Production of fiber bundle 15) and spinning in the spinning device 7 are resumed. Then, after the yarn end on the package 17 side and the yarn end of the spun yarn 16 newly fed from the spinning device 7 are spliced by the yarn joining device 92, the winding by the winding device 12 is resumed. .

  The yarn splicing cart 3 is provided with two nozzles 45 and 46 (fluid spraying devices) that spray air toward the slack eliminating roller 30. These two nozzles 45 and 46 are respectively connected to an air supply source (not shown) via a supply valve 47 (see FIG. 7) provided on the yarn splicing carriage 3, and from the two nozzles 45 and 46, Air is blown toward the outer peripheral surface of the slack eliminating roller 30. One nozzle 45 blows air toward the tapered upstream end of the slack eliminating roller 30, and the blowing direction is the radial direction of the slack eliminating roller 30. The other nozzle 46 blows air toward the taper-shaped downstream end of the slack eliminating roller 30, and its tip (air injection part) has a radial direction with respect to the slack eliminating roller 30. It inclines so that it may face the rotation-axis direction center side of the roller 30. FIG.

  By these two nozzles 45, 46, air is blown onto the outer peripheral surface of the slack eliminating roller 30 from both ends in the rotational axis direction, whereby the yarn portion of the spun yarn 16 remaining on the outer peripheral surface of the slack eliminating roller 30. 16a is removed. The yarn portion 16 a removed from the roller 30 by the air blown from the nozzles 45 and 46 is sucked and discharged by a cleaning suction pipe (not shown) provided in the vicinity of the slack eliminating roller 30.

  As shown in FIG. 3, the two nozzles 45 and 46 are arranged so as to sandwich the yarn detection sensor 34 with respect to the rotational axis direction of the slack eliminating roller 30. The air blown from the respective nozzles 45, 46 to both ends of the slack eliminating roller 30 flows in the rotation axis direction on the outer peripheral surface of the slack eliminating roller 30, and is an irradiation position of the light emitting element 41 of the yarn detection sensor 34. The center of the slack eliminating roller 30 is reached. Therefore, even when the yarn portion 16a remains on the surface of the slack eliminating roller 30 at a position away from the irradiation position of the light emitting element 41 (that is, the yarn detection position of the yarn detection sensor 34), the nozzle 45 and 46 are sprayed. Since the yarn portion 16 a is transferred to the detection position of the yarn detection sensor 34 by the air that has been generated, the yarn portion 16 a remaining on the surface of the slack eliminating roller 30 is reliably detected by the yarn detection sensor 34.

  If the positions of the tip portions (air injection portions) of the two nozzles 45 and 46 in the circumferential direction of the roller 30 are the same, they are blown from the two nozzles 45 and 46 to the slack eliminating roller 30 respectively. The air flowing in the roller axial direction collides with the surface of the roller 30, and the yarn portion 16a remaining on the surface of the roller 30 cannot move in the roller axial direction and stops at a position away from the yarn detection position of the yarn detection sensor 34. May remain. Therefore, as shown in FIG. 6, the tip portions of the two nozzles 45 and 46 are arranged so as to be shifted from each other in the circumferential direction of the roller 30. With this configuration, the yarn portion 16a is pushed by the force of the air ejected from the two nozzles 45 and 46 at the two locations, so that it can move in the direction of the rotation axis of the roller 30.

  In the spinning machine 1 of the present embodiment, the air blowing by the two nozzles 45 and 46 is performed for the following reason. As can be seen from FIG. 2, in the spinning machine 1 according to the present embodiment, a feed roller for supplying the spun yarn 16 to the winding device 12 is not provided on the downstream side of the spinning device 7. The slack eliminating roller 30 plays a role of pulling the spun yarn 16 from the spinning device 7 to the downstream side.

  Here, if the spun yarn 16 is excessively wound around the slack eliminating roller 30 at a very high density, the yarn tension on the upstream side of the roller 30 becomes too high, causing defective yarn. Further, the above-described yarn detection sensor 34 detects whether or not the spun yarn 16 is wound up to the central portion of the slack eliminating roller 30, and is configured to monitor excessive winding of the spun yarn 16. It has not been. As described above, since it is difficult to detect the state where the spun yarn 16 is excessively wound, in order to increase the allowable yarn amount wound around the slack eliminating roller 30, the diameter of the roller 30 is made larger than that of the conventional one. ing. However, since the area of the outer peripheral surface of the roller 30 increases when the diameter of the roller 30 is large, one yarn whose irradiation position is fixed when a small amount of the yarn portion 16a remains after the yarn is cut by the cutter 10. It is difficult for the detection sensor 34 to reliably detect the yarn portion 16a remaining somewhere on the surface of the wide roller 30. Therefore, the yarn portion 16 a is moved on the surface of the roller 30 so as to enter the yarn detection position of the yarn detection sensor 34 by blowing air onto the surface of the roller 30 by the two nozzles 45 and 46.

  Next, the electrical configuration of the spinning machine 1 will be described with reference to the block diagram of FIG. As shown in FIG. 7, the machine base control unit 96 (corresponding to the control device of the present invention) that controls the entire spinning machine 1 includes the unit control units 21 of the plurality of spinning units 2 and the yarn joining cart 3. It is connected to the control unit 50 and controls and monitors the plurality of spinning units 2 and the yarn splicing cart 3.

  The unit control unit 21 of the spinning unit 2 includes a CPU (Central Processing Unit) that is an arithmetic processing device, a ROM (Read-Only Memory) in which a program executed by the CPU and data used for the program are stored, and a program A RAM (Random Access Memory) for temporarily storing data during execution, an input / output interface for inputting / outputting data to / from the outside, and the like. The machine control unit 96, the unit control unit 21 of the plurality of spinning units 2, and the control unit 50 of the yarn splicing cart 3 are package winding processes realized by controlling the spinning device 7 and the winding device 12, The following processing is performed.

  During spinning, the yarn detection sensor 34 determines whether or not the spun yarn 16 is present at a predetermined yarn detection position on the outer peripheral surface of the central portion of the slack eliminating roller 30 (that is, from the upstream end of the slack eliminating roller 30 to the central portion). Whether or not a predetermined amount of the spun yarn 16 has been wound) and when it is determined that the amount of winding of the spun yarn 16 has decreased, the winding speed of the winding device 12 is reduced, etc. A state where the spun yarn 16 of a predetermined amount or more is wound around the slack eliminating roller 30 is maintained.

  When the yarn clearer 11 detects a yarn defect in the spun yarn 16 and receives a yarn defect detection signal from the yarn clearer 11, the cutter 10 is controlled to cut the spun yarn 16. Further, the control unit 50 of the yarn splicing carriage 3 that performs yarn splicing after yarn cutting controls the supply valve 47 to blow air from the nozzles 45 and 46 toward the slack eliminating roller 30. At this time, if the yarn portion 16 a remains on the surface of the slack eliminating roller 30, it is detected by the yarn detection sensor 34, and the detection result is sent from the unit control unit 21 to the machine control unit 96. Then, the machine base control unit 96 determines whether or not to perform yarn joining by the yarn joining device 92 based on the detection result of the yarn detection sensor 34 (presence / absence of the yarn portion 16a).

  A series of processes performed in the spinning unit 2 and the yarn splicing cart 3 when the yarn defect is detected will be described in detail with reference to the flowcharts of FIGS. 8 and 9, Si (i = 10, 11,...) Indicates a step number.

  FIG. 8 is a flowchart showing a spinning stop process when a yarn defect is detected. When the yarn clearer 11 detects a yarn defect of the spun yarn 16 (S10: Yes), the unit control unit 21 controls the cutter 10 to cut the spun yarn 16 (S11). At the same time, the machine control unit 96 stops the supply and stretching of the sliver 14 by the draft device 6 (drive of the front roller 26 and the middle roller 25), and the spinning by the spinning device 7 (to the pneumatic spinning device 7). Air supply) is stopped (S12). Here, based on the yarn defect detection signal of the yarn clearer 11, it was determined that the detected yarn defect was not temporarily generated but was a serious one based on a device failure such as a very long yarn defect. In such a case (S13: Yes), the machine base control unit 96 causes the unit control unit 21 to turn on an abnormality display lamp to notify the operator of the abnormal state and inspect / replace parts such as various rollers. (Operator call: S14). When the abnormal state is canceled by the operator, the machine base control unit 96 determines that the yarn splicing is possible, and sends a signal to the control unit 50 of the yarn splicing carriage 3 to detect the yarn defect and cut the yarn. The yarn joining cart 3 is moved to a position close to the slack eliminating roller 30 of the broken spinning unit 2 (a position below the roller 30) (yarn joining cart call: S17).

  If it is determined that the detected yarn defect is a slight occurrence (S13: No), the yarn detection sensor 34 cuts the spun yarn 16 on the package 17 side at the yarn defect portion when the yarn is cut. Thus, it is detected whether or not a small amount of the thread portion 16a remains on the slack eliminating roller 30 (S15). When the yarn portion 16a is detected by the yarn detection sensor 34 (S15: Yes), the machine control unit 96 notifies the operator of the state by turning on an abnormality display lamp or the like, and the remaining yarn The removal of the portion 16a is prompted (operator call: S16). When the yarn portion 16a is removed by the operator and the abnormal state is released, it is determined again in S15 whether the yarn portion 16a is really removed. When the yarn portion 16a is not detected by the yarn detection sensor 34 (S15: No), the machine base control unit 96 sends a signal to the control unit 50 of the yarn splicing carriage 3, and yarn defect detection and yarn cutting are performed. The yarn joining carriage 3 is moved to a position close to the slack eliminating roller 30 of the spinning unit 2 (a position below the roller 30) (yarn joining carriage call: S17), and the following yarn joining process is performed (S20). .

  That is, in this embodiment, after the yarn is cut by the cutter 10 and before the yarn joining cart 3 is moved, the machine control unit 96 determines whether the yarn joining cart can be moved based on the detection result of the yarn detection sensor 34. As a result, it is possible to prevent the yarn splicing carriage 3 from moving unnecessarily in a situation where yarn splicing is prohibited.

  FIG. 9 is a flowchart of the yarn joining process. When the yarn splicing cart 3 arrives at the spinning unit 2 where the yarn has been cut, the control unit 50 of the yarn splicing cart 3 controls the supply valve 47 so that the two nozzles 45 and 46 are directed toward the slack eliminating roller 30. Air is blown (S21). At this time, the air blown from the two nozzles 45, 46 to both ends of the slack eliminating roller 30 flows along the outer peripheral surface of the slack eliminating roller 30 and is the detection position of the yarn detection sensor 34. Reach the center of the roller 30. Therefore, even when the yarn portion 16a remains at a position away from the yarn detection position of the slack eliminating roller 30, the yarn portion 16a is transferred to the yarn detection position.

  In addition, as shown in FIG. 6, the slack eliminating roller 30 is rotated while air is blown from the tip portions of the two nozzles 45 and 46 which are displaced in the circumferential direction to the slack eliminating roller 30. It is preferable to make it. By the rotation of the roller 30 described above, the portion of the yarn portion 16a remaining on the surface of the roller 30 where the air collides (the portion receiving the force from the air) continuously changes. Then, the yarn portion 16a greatly vibrates in the rotation axis direction (left and right direction in FIG. 6), and the initial position of the yarn portion 16a is separated from the yarn detection position of the yarn detection sensor 34 in the rotation axis direction of the roller 30. Even if it is, the yarn detection sensor 34 is likely to detect it.

  If the yarn portion 16a is detected by the yarn detection sensor 34 after the air blowing (S22: Yes), the machine control unit 96 notifies the operator of the state and prompts the removal of the remaining yarn portion 16a (operator). Call: S23). When the yarn portion 16a is removed by the operator and the abnormal state is released, air blowing is again performed by the nozzles 45 and 46 (S21), and it is determined in S22 whether the yarn portion 16a has been really removed.

  On the other hand, if the yarn detection sensor 34 does not detect the yarn portion 16a even after air blowing (S22: No), it is determined that the yarn portion 16a does not exist at all on the surface of the slack eliminating roller 30. Then, the supply and drawing of the sliver 14 by the draft device 6 and the spinning by the spinning device 7 are started, and the yarn end of the spun yarn 16 newly sent from the spinning device 7 and the yarn end on the package 17 side are It is connected by the joining device 92 (yarn joining operation: S24).

  Whether or not the yarn joining is successful is determined based on detection signals from the yarn detection sensor 34 and the travel sensor 28 (see FIG. 2) (S25). That is, when the spun yarn 16 is detected by both the yarn detection sensor 34 and the traveling sensor 28, it is determined that the splicing has succeeded, and when the spun yarn 16 has not been detected in either one, it is determined that the splicing has failed. When it is determined that the yarn joining operation is successful (S25: Yes), the winding operation of the package 17 by the winding device 12 is resumed.

  On the other hand, when it is determined that the yarn joining has failed (S25: No), the operator is informed of the abnormal state and prompts the inspection of the parts used for the yarn joining operation such as the yarn joining device 92 (operator call: S26). When the inspection by the operator is completed and the abnormal state is released, the process proceeds to S21 to perform air blowing again, and at this time, a small amount of the thread portion 16a generated due to the yarn joining failure is formed on the surface of the slack eliminating roller 30. Whether or not the remaining state is detected is detected, and if the yarn portion 16a does not remain, the yarn joining operation is performed again (S24).

  Here, even if the yarn portion 16a generated due to the yarn joining failure remains on the surface of the slack eliminating roller 30, if it is surely removed by the inspection after the yarn joining failure, air blowing (S21) and The yarn joining operation (S24) may be performed immediately without detecting the yarn portion 16a (S22). However, in reality, there is a possibility that the operator may overlook the yarn portion 16a and the remaining yarn portion 16a is removed. Is not necessarily performed. Thus, as described above, the yarn portion 16a is detected again (S22) so that the yarn joining is performed in a state where the yarn portion 16a does not exist, and then the yarn joining operation (S24) is started.

  Note that, based on the detection result of the yarn detection sensor 34, whether or not the machine base control unit 96 causes the yarn joining device 92 to perform yarn joining is determined by the yarn detection sensor 34 even for a moment. The yarn joining may be prohibited immediately. Alternatively, if the yarn portion 16a is instantaneously detected and then remains undetected for a certain period of time, it is determined that the yarn portion 16a has been removed by air blowing, although the yarn portion 16a initially remained. Then, yarn joining may be permitted.

  Next, modified embodiments in which various modifications are made to the embodiment will be described. However, components having the same configuration as in the above embodiment are given the same reference numerals and description thereof is omitted as appropriate.

1] In the above-described embodiment, the nozzles 45 and 46 for blowing air to the surface of the slack eliminating roller 30 are provided in the yarn splicing carriage 3 provided with the yarn splicing device 92, but are provided in the casing 13 of the spinning machine 1 and the like. Then, it may be provided separately from the yarn joining cart 3. In this case, after the spun yarn 16 is cut by the cutter 10, air is blown from the nozzles 45, 46 toward the slack eliminating roller 30, and at that time, the yarn portion 16 a is not detected by the yarn detection sensor 34. It is preferable to move the yarn splicing cart 3 only. Prior to the movement of the yarn splicing cart 3, air is blown from the nozzles 45, 46, so that the yarn portion 16a is at a position away from the yarn detection position of the yarn detecting sensor 34 before the yarn splicing cart 3 is moved. Therefore, it is not necessary to detect the yarn portion 16a again after the yarn joining cart 3 is moved and to determine whether the yarn joining is possible.

2] There may be one nozzle that blows air onto the surface of the slack eliminating roller 30. In this case, the yarn portion 16a remaining on the surface of the roller 30 is moved in one direction by the air blown from one nozzle. The yarn detection position of the yarn detection sensor 34 is reached. Further, if the air blowing from the nozzle is performed for the purpose of removing the yarn portion 16a from the roller 30, rather than transferring the remaining yarn portion 16a to the yarn detection position of the sensor 34, as in the above embodiment. It can be said that it is preferable to spray in one direction from only one nozzle, rather than spraying from two nozzles 45 and 46 respectively. Furthermore, three or more nozzles may be provided according to the purpose of air blowing.

  In addition, the yarn detection sensor 34 is slack, such that a plurality of yarn detection sensors 34 are provided in the direction of the rotation axis of the slack eliminating roller 30, or one yarn detection sensor is configured to be able to scan in the direction of the rotation axis of the roller 30. When the yarn portion 16a can be detected over a wide range of the surface of the take-up roller 20, and it is not necessary to move the yarn portion 16a on the surface of the slack removal roller 30, the nozzle for blowing air may be omitted. Is possible.

3] In the above-described embodiment, the sensor for detecting the spun yarn 16 wound around the slack eliminating roller 30 during winding of the package and the sensor for detecting the yarn portion 16a remaining on the slack eliminating roller 30 at the time of yarn cutting are one. Although the yarn detection sensor 34 is also used, a separate sensor may be used.

4] The yarn detection sensor for detecting the yarn on the surface of the slack eliminating roller 30 is not limited to the reflection type photosensor described in the above embodiment, and sensors of various other detection methods can be employed. .

5] The above embodiment is an example in which the present invention is applied to a spinning machine, but the application target of the present invention is not limited to the spinning machine, and the present invention is applied to a yarn winding machine of a textile machine other than the spinning machine. It is also possible to apply.

DESCRIPTION OF SYMBOLS 1 Spinning machine 3 Yarn splicing cart 10 Cutter 11 Yarn clearer 12 Winding device 16 Spinning yarn 16a Yarn part 17 Package 21 Unit control part 30 Slack removal roller (yarn storage roller)
34 Thread detection sensor 41 Light emitting element 42 Light receiving element 45, 46 Nozzle 92 Yarn splicing device 96 Machine control section

Claims (7)

A winding device for winding a traveling yarn to form a package;
A yarn defect detecting device for detecting a defect of the yarn wound on the winding device;
A cutting device for cutting a yarn when a yarn defect is detected by the yarn defect detection device;
A yarn splicing device for connecting the upstream yarn end and the downstream yarn end after the yarn cutting by the cutting device;
A yarn storage device that is disposed between the winding device and the cutting device and temporarily stores the yarn wound around the winding device;
Equipped with a control device for controlling the yarn winding machine,
The yarn accumulating device includes a yarn accumulating roller that is configured to be freely rotatable and on which a yarn is wound, and a yarn detecting sensor that detects a yarn on the surface of the yarn accumulating roller,
The controller is
When the yarn is cut by the cutting device, it is determined whether or not to cause the yarn joining device to perform yarn joining based on the detection result of the yarn detection sensor.   The yarn winding machine according to claim 1, further comprising a fluid spraying device that sprays a fluid onto a surface of the yarn accumulating roller after the yarn is cut by the cutting device. A yarn joining cart provided with the yarn joining device and the fluid spraying device;
The controller is
When the yarn is cut by the cutting device, if the yarn on the surface of the yarn accumulating roller is not detected by the yarn detecting sensor, the yarn joining cart is brought close to the yarn accumulating roller,
Further, when the fluid is sprayed from the fluid spraying device of the yarn splicing carriage onto the surface of the yarn storage roller, and when the yarn on the surface of the yarn storage roller is not detected by the yarn detection sensor, The yarn winding machine according to claim 2, wherein the yarn joining device performs yarn joining.   The fluid spraying device sprays the fluid onto the yarn accumulating roller so that the fluid flows from the position away from the yarn detecting position of the yarn detecting sensor toward the yarn detecting position on the surface of the yarn accumulating roller. The yarn winding machine according to claim 3. Two fluid spraying devices that spray fluid from both ends in the direction of the rotation axis to the yarn storage roller,
The yarn winding machine according to claim 4, wherein the positions of the fluid ejecting portions of the two fluid spraying devices are shifted with respect to the circumferential direction of the yarn accumulating roller. The controller is
The yarn winding machine according to claim 5, wherein when the fluid is sprayed from the two fluid spraying devices toward the yarn accumulating roller, the yarn accumulating roller is simultaneously rotated. The yarn detection sensor is a reflective photosensor including a light emitting element and a light receiving element,
The light emitting element is disposed so as to irradiate light to a predetermined position in the middle of the rotation direction of the yarn accumulating roller, and the yarn detection sensor is configured to take up the yarn during winding of the package by the winding device. The yarn winding machine according to any one of claims 1 to 6, wherein whether or not the yarn is wound up to the predetermined position of the storage roller can be detected.

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