JP5953911B2 - Yarn monitoring device and yarn winding machine provided with the same - Google Patents

Description

  The present invention relates to a structure in which air is blown to remove yarn waste adhering to a yarn traveling path in a yarn monitoring device that monitors a traveling yarn.

  A yarn winding machine configured to wind a yarn around a bobbin, such as a spinning machine or an automatic winder, is known. This type of yarn winding machine is provided with a yarn monitoring device (yarn clearer) that monitors the state of the traveling yarn in real time, and detects yarn defects (locations where the yarn quality is abnormal) by the yarn monitoring device. .

  In a yarn winding machine, fine yarn fibers, broken yarn ends, and other dust (hereinafter collectively referred to as “thread waste”) may scatter and adhere to each part during winding of the yarn. For example, when a large amount of yarn waste adheres to the yarn monitoring device, the yarn monitoring device may not be able to accurately monitor the yarn state. Patent Document 1 discloses a spinning machine provided with a cleaning nozzle for blowing away yarn waste and the like remaining in a detection head of a yarn clearer. The cleaning nozzle is disposed so that one end thereof faces the upper surface of the yarn clearer, and jets compressed air around the detection head.

JP 2005-232650 A

  By the way, since compressed air needs to be generated by a compressor, consumption of a large amount of the compressed air causes an increase in cost. For this reason, it is desired that the cleaning nozzle can more reliably remove the yarn waste with a smaller flow rate. Therefore, it is conceivable to improve the efficiency and certainty of lint removal by devising the arrangement and shape of the cleaning nozzle.

  However, Patent Document 1 only discloses that “the cleaning nozzle is arranged so as to face the upper surface of the yarn clearer”, and there is no detailed description regarding the arrangement and shape of the cleaning nozzle.

  An object of the present invention is to provide a configuration capable of efficiently and reliably removing attached yarn waste in a yarn monitoring device.

Means and effects for solving the problems

According to an aspect of the present invention, the yarn monitoring device includes a yarn passage forming member, a detection unit, and a blowing unit. The yarn passage forming member is formed with a yarn passage for allowing a yarn traveling along a predetermined yarn path to pass therethrough. The detection unit detects the state of the yarn on at least a part of the wall surface of the yarn passage. The blowing part ejects fluid in a predetermined ejection direction and sprays it on the wall surface of the yarn passage. The yarn passage is formed in a groove shape along the yarn path. The blowing portion is configured to eject the fluid toward the inside of the yarn passage and to spray the fluid only to one of the pair of facing wall surfaces. And when the ejection direction is orthogonal to the yarn path and viewed in a direction parallel to the wall surface , the ejection direction is set obliquely with respect to the wall surface and viewed in a direction parallel to the yarn path Sometimes, it is set obliquely with respect to the wall surface.

Thus, by spraying the fluid from the oblique direction to the wall surface, the fluid that hits the wall surface flows along the wall surface. Thereby, since a fluid can be made to act on the wide range of a wall surface, the yarn waste adhering to the wall surface can be efficiently removed with a small flow rate. Moreover, the waste thread on the wall surface can be removed in a wider range by spraying the fluid so as to be inclined when viewed from another direction. Furthermore, a spiral flow is generated in the yarn passage by injecting a fluid in an oblique direction toward the inside of the groove-like yarn passage. Thereby, the lint on the wall surface can be more reliably removed with a smaller flow rate.

  In the above-described yarn monitoring device, it is preferable that the blowing unit ejects the fluid from a slit-shaped outlet.

  In this way, by ejecting the fluid from the slit, the belt-like fluid can be applied to the wall surface, so that lint can be removed in a wide range.

  In the above-described yarn monitoring device, it is preferable that the blowing portion ejects the fluid from the upstream side to the downstream side in the traveling direction of the yarn.

  If a fluid is sprayed from the downstream side to the wall surface, the yarn waste that should have been blown upstream by the fluid may be returned along with the traveling yarn. Therefore, as described above, by blowing the fluid from the upstream side to the wall surface, the yarn waste is blown away to the downstream side, so that the yarn waste is not returned along with the yarn. Thereby, removal of yarn waste can be performed efficiently.

  The yarn monitoring device includes a first block having the yarn passage forming member and a second block having the blowout portion. The first block and the second block are arranged side by side in a direction parallel to the yarn path. A fluid supply path to the blowout part is formed in the second block.

  According to this, since it is not necessary to form the fluid supply path in the first block and the yarn passage forming member, the first block and the yarn passage forming member can be formed in a simple shape.

  The yarn monitoring device preferably includes a cutter for cutting the yarn and a cutter blowout unit that blows the fluid against the cutter in the second block.

  In this way, by providing a blow-out part dedicated to the cutter, it is possible to spray fluid to the cutter at a pinpoint. Thereby, the broken end of the yarn caught on the cutter can be reliably removed. Further, by providing a cutter or the like in the second block, the first block side can be made a simple shape.

  According to another aspect of the present invention, there is provided a yarn winding machine including a winding unit that winds a yarn and the above-described yarn monitoring device that monitors the yarn wound by the winding unit.

  This yarn winding machine can reliably remove the yarn waste adhering to the yarn passage of the yarn monitoring device with a small fluid flow rate. Therefore, the accuracy of yarn monitoring by the yarn monitoring device can be maintained at a low cost, and the quality of the wound yarn can be improved.

1 is a front view showing an overall configuration of a spinning machine according to an embodiment of the present invention. The side view of a spinning unit. The external appearance perspective view of a thread | yarn monitoring apparatus. The typical sectional view of a holder. The front view of a thread | yarn monitoring apparatus. The plane sectional view of the 1st block. The plane sectional view of the 2nd block.

  Next, a spinning machine (spinning machine) according to an embodiment of the present invention will be described with reference to the drawings. A spinning machine 1 as a yarn winding machine shown in FIG. 1 mainly includes a large number of spinning units 2 and a yarn splicing carriage 3 arranged in parallel.

  As shown in FIG. 2, each spinning unit 2 includes a draft device 4, a spinning device 5, a yarn monitoring device 6, a yarn storage device 7, and a winding unit 8 in order from upstream to downstream. I have. In the present specification, “upstream” and “downstream” mean upstream and downstream in the traveling direction of the fiber bundle and spun yarn during spinning.

  The draft device 4 stretches the sliver (fiber bundle raw material) 9 to form a fiber bundle 10. The draft device 4 has a plurality of draft rollers 11, 12, 13, and 14 and opposing rollers arranged to face the draft rollers. The plurality of draft rollers 11, 12, 13, and 14 are each driven to rotate at a predetermined rotational speed. The draft device 4 stretches the sliver 9 supplied from a sliver case (not shown) by sandwiching and transporting the sliver 9 between the rotating draft rollers 11, 12, 13 and 14 and the opposing roller opposed thereto. A fiber bundle 10 is obtained (drafted). The fiber bundle 10 drafted by the draft device 4 is supplied to the spinning device 5.

  The spinning device 5 twists the fiber bundle 10 to generate a spun yarn 15. The configuration of the spinning device 5 is not particularly limited, but the spinning device 5 of the present embodiment is configured as a pneumatic spinning device. The pneumatic spinning device 5 generates a swirling airflow therein, and applies the twisting to the fiber bundle 10 by causing the swirling airflow to act on the fiber bundle 10.

  The spun yarn 15 generated by the spinning device 5 passes through the yarn monitoring device 6. The yarn monitoring device 6 monitors the state of the traveling spun yarn 15 and detects a portion where the quality of the spun yarn 15 is abnormal (yarn defect). Further, the yarn monitoring device 6 is provided with a cutter 16 for cutting the spun yarn 15. The detailed configuration of the yarn monitoring device 6 will be described later.

  The spun yarn 15 that has passed through the yarn monitoring device 6 is wound around the bobbin 17 by the winding unit 8. The winding unit 8 includes a cradle arm 19, a winding drum 20, and a traverse device 21.

  The cradle arm 19 rotatably supports a bobbin 17 for winding the spun yarn 15. The winding drum 20 is driven to rotate in contact with the outer peripheral surface of the bobbin 17, thereby rotating the bobbin 17 in a driven manner. The traverse device 21 includes a traverse guide 22 that is engaged with the spun yarn 15 and driven left and right (in the winding width direction of the bobbin 17). The traverse device 21 traverses the spun yarn 15 wound around the bobbin 17.

  With the spinning unit 2 configured as described above, the spun yarn 15 can be generated from the sliver 9 and wound around the bobbin 17. The bobbin 17 in a state where the spun yarn 15 is wound up in this way is called a “package”.

  In the spinning machine 1 of the present embodiment, the yarn accumulating device 7 is disposed between the yarn monitoring device 6 and the winding unit 8. As shown in FIG. 2, the yarn storage device 7 includes a yarn storage roller 23 and an electric motor 25 that rotationally drives the yarn storage roller 23.

  The yarn storage roller 23 can temporarily store a certain amount of spun yarn 15 around its outer peripheral surface. Since the spun yarn 15 is temporarily stored in this way, the yarn storage device 7 functions as a kind of buffer. As a result, it is possible to eliminate a problem (for example, slack in the spun yarn 15) when the spinning speed in the spinning device 5 and the winding speed in the winding unit 8 do not match for some reason.

  Each spinning unit 2 includes a unit controller 26. The unit controller 26 appropriately controls each component included in the spinning unit 2.

  As shown in FIGS. 1 and 2, the yarn joining cart 3 includes a yarn joining device 27 and a suction device (a suction pipe 28 and a suction mouth 29).

  The yarn joining device 27 is a device for joining yarn ends together (yarn joining). The configuration of the yarn joining device 27 is not particularly limited. For example, a pneumatic splicer that twists yarn ends together by a swirling airflow can be employed. The suction pipe 28 sucks and captures the yarn end delivered from the spinning device 5 and guides it to the yarn joining device 27. The suction mouth 29 sucks and captures the yarn end from the package 18 supported by the winding unit 8 and guides it to the yarn joining device 27.

  Next, the operation when a yarn defect is detected by the yarn monitoring device 6 will be briefly described.

  When the yarn monitoring device 6 detects a yarn defect (a portion where the spun yarn 15 is abnormal), the yarn monitoring device 6 transmits a yarn defect detection signal to the unit control unit 26 described above. When the unit controller 26 receives the yarn defect detection signal, the unit controller 26 immediately operates the cutter 16 to cut the spun yarn 15. The spun yarn 15 on the downstream side of the cut portion is once wound around the package 18. At this time, the spun yarn 15 wound around the package 18 includes a yarn defect detected by the yarn monitoring device 6. Furthermore, the unit controller 26 stops the winding in the winding unit 8. Subsequently, the unit control unit 26 sends a control signal to the yarn splicing carriage 3 to travel to the front of the spinning unit 2 where the yarn defect is detected.

  When the yarn joining cart 3 stops in front of the spinning unit 2, the yarn end delivered from the spinning device 5 is sucked and captured by the suction pipe 28 and guided to the yarn joining device 27. Before and after this, the yarn joining cart 3 sucks and captures the yarn end wound around the package 18 by the suction mouse 29 and guides it to the yarn joining device 27. At this time, the portion of the yarn defect wound around the package 18 is sucked and pulled out by the suction mouse 29. As a result, the yarn defect detected by the yarn monitoring device 6 is removed from the package 18.

  The yarn joining device 27 joins the yarn ends guided by the suction pipe 28 and the suction mouth 29 (yarn joining). Thereby, the spun yarn 15 cut by the cutter 16 becomes continuous again between the spinning device 5 and the winding unit 8.

  When the yarn joining operation in the yarn joining device 27 is completed, the unit control unit 26 resumes the winding of the spun yarn 15 by the winding unit 8. With the above operation, the yarn defect detected by the yarn monitoring device 6 can be removed, and the winding of the spun yarn 15 around the package 18 can be resumed.

  Next, the configuration of the yarn monitoring device 6 will be described in detail.

  As shown in FIG. 3, the yarn monitoring device 6 of this embodiment mainly includes a holder (sensor holding member) 30, a housing 31, and yarn path guides 32 and 33.

  The holder 30 is a plastic member, and a detection unit (such as a sensor) for detecting the state of the spun yarn 15 is incorporated therein. The holder 30 has a first yarn passage 34 through which the spun yarn 15 passes. Therefore, it can be said that the holder 30 is a yarn passage forming member. The first yarn path 34 formed in the holder 30 is formed in a groove shape along the traveling path of the spun yarn 15 (hereinafter referred to as “yarn path”).

  The first yarn passage 34 is formed in a substantially U-shape (or U-shape) on the inner wall surface when cut along a plane orthogonal to the yarn path. That is, when viewed in a direction parallel to the yarn path, the first yarn passage 34 has a shape in which one end portion is opened and the other end portion is closed (see FIG. 4). . In the following description of the yarn monitoring device 6, when viewed in a direction parallel to the yarn path, the direction in which the first yarn passage 34 is open (upward in FIG. 4 (b)). The front-rear direction of the yarn monitoring device 6 is defined with “front” and the opposite direction “rear”. That is, the side where the first yarn passage 34 is open is the front side of the yarn monitoring device 6.

  The first yarn passage 34 has a pair of side wall surfaces 35 and 35 arranged in parallel with each other across the yarn path. The side wall surfaces 35 and 35 are arranged in parallel to the front-rear direction (vertical direction in FIG. 4B) of the yarn monitoring device 6 and the yarn path. The spun yarn 15 passing through the first yarn passage 34 travels between the side wall surfaces 35 and 35.

  Next, the configuration of the detection unit will be described with reference to FIG. The yarn monitoring device 6 of the embodiment is configured as an optical yarn monitoring device that detects the state of the spun yarn 15 by irradiating the spun yarn 15 with light. Specifically, the detection unit includes a light emitting element 37 and a light receiving element 38. As the light emitting element 37, for example, an appropriate light emitting element such as an LED can be adopted. The light receiving element 38 is configured as a photodiode, and converts the intensity of the received light into an electric signal and outputs it.

  The light receiving element 38 is disposed such that the light receiving surface thereof constitutes a part of the side wall surface 35 of the first yarn passage 34. Further, a resin-made transparent plate 39 is provided on a part of the side wall surface 35 opposite to the light receiving element 38. A light emitting element 37 is disposed on the opposite side of the first yarn passage 34 (inside the holder 30) with the transparent plate 39 interposed therebetween. The light emitting element 37 irradiates the first yarn passage 34 with light through the transparent plate 39. The light emitting element 37 and the light receiving element 38 are arranged so as to face each other across the yarn path.

  With the above configuration, a part of the light from the light emitting element 37 is blocked by the spun yarn 15 and received by the light receiving element 38. For this reason, the intensity of light received by the light receiving element 38 varies depending on the thickness of the spun yarn 15. Therefore, the yarn monitoring device 6 can detect the thickness of the spun yarn 15 based on the intensity of the light received by the light receiving element 38.

  As described above, the detection unit of the yarn monitoring device 6 detects the state of the spun yarn 15 that passes between the side wall surfaces 35 in a part of the side wall surface 35 of the first yarn passage 34 (specifically, the spun yarn 15).

  Next, the housing 31 of the yarn monitoring device 6 will be described. The housing 31 includes a first block 41 and a second block 42 that are arranged side by side in a direction parallel to the yarn path. The first block 41 and the second block 42 are each made of plastic. The first block 41 and the second block 42 are formed as separate bodies and can be separated.

  As shown in FIG. 6, the holder 30 is attached to the first block 41. Further, the first block 41 houses a circuit board 44 for controlling the light emitting element 37 and the light receiving element 38 of the detection unit.

  The second block 42 is disposed on the upstream side of the first block 41. As shown in FIGS. 3 and 7 and the like, the second block 42 is formed with a second yarn passage 43 through which the spun yarn 15 passes. The second yarn passage 43 is formed in a groove shape along the yarn path, and has a substantially U-shaped (or substantially U-shaped) cross-sectional shape. The second yarn passage 43 is formed so as to communicate with the first yarn passage 34 on the holder 30 side.

  The above-described cutter 16 is disposed in the second block 42. The cutter 16 can cut the spun yarn 15 traveling in the second yarn passage 43. Further, a cutter driving mechanism (not shown) for driving the cutter 16 and cutting the spun yarn 15 is disposed in the second block 42.

  The yarn path guides 32 and 33 are members for regulating the yarn path of the spun yarn 15 and are made of a wear-resistant material (ceramic in the present embodiment). The yarn guides 32 and 33 are arranged one by one on the upstream side and the downstream side of the holder 30. The spun yarn 15 travels while contacting the upper and lower yarn path guides 32 and 33. Thereby, since the traveling position of the spun yarn 15 with respect to the holder 30 is stabilized, the state of the spun yarn 15 can be stably monitored in the detection unit.

  Further, the yarn monitoring device 6 of the present embodiment includes a blowout portion 45 that ejects fluid (specifically, compressed air) to the side wall surface 35 of the first yarn passage 34. Thereby, the lint etc. which adhered to the side wall surface 35 can be blown off. The compressed air may be ejected regularly or irregularly at an appropriate timing. Thereby, since the side wall surface 35 (especially the transparent plate 39 and the light receiving surface of the light receiving element 38) can be kept clean, the yarn monitoring device 6 can monitor the state of the spun yarn 15 with high accuracy.

  Then, the structure of the blowing part 45 in the yarn monitoring apparatus 6 of this embodiment is demonstrated in detail.

  The purpose of the blowing part 45 is to blow off the lint attached to the light receiving surface of the light receiving element 38 and / or the transparent plate 39 by blowing out compressed air. Therefore, a configuration in which the blowing portion 45 is formed in the vicinity of the transparent plate 39 and the light receiving element 38 and air is blown to the transparent plate 39 and the light receiving element 38 at a pinpoint is conceivable.

  However, in order to blow air on the transparent plate 39 and the light receiving element 38 at a pinpoint, it is necessary to form the blowing portion 45 in the holder 30, for example. In this case, it is necessary to form an air supply path for the blowing portion 45 in the holder 30, and the shape of the holder 30 becomes complicated. Although it is possible to form the blowing part 45 in the first block 41 of the housing 31, in this case, it is necessary to form an air supply path in the first block 41. However, since the circuit board 44 and the like are arranged in the first block 41, there is little space and it is difficult to form an air passage. In addition, when an air passage is formed in the first block 41, the shape of the first block 41 becomes complicated.

  Further, if the compressed air is configured to be blown at a pinpoint, the air flow can be applied only to a narrow range of the transparent plate 39 and the light receiving element 38. Therefore, in order to clean the light receiving surfaces of the transparent plate 39 and the light receiving element 38 as a whole, it is necessary to form a plurality of blowing portions. When the number of blow-out parts increases, the amount of compressed air consumed increases, resulting in poor efficiency.

  Therefore, the blowing portion 45 of the present embodiment is configured to blow compressed air from an oblique direction against the side wall surface 35 of the first yarn passage 34. Thus, the compressed air can be flowed along the side wall surface 35 by spraying the compressed air in an oblique direction on the side wall surface 35. In this way, by flowing air along the side wall surface 35, the air flow can be applied to a wide range of the side wall surface 35. Thereby, since the compressed air can be entirely applied to the transparent plate 39 and the light receiving element 38, the lint attached to the transparent plate 39 and / or the light receiving element 38 can be efficiently blown off with a small air flow rate. it can.

  The direction in which the air is blown out from the blowing portion 45 is indicated by thin line arrows in FIGS. 3 and 5 to 7. As shown in FIG. 5, when viewed in a direction perpendicular to the yarn path and parallel to the side wall surface 35 of the first yarn passage 34, the direction of the compressed air ejected from the blowing portion 45 is relative to the side wall surface 35. Is set diagonally. Accordingly, the direction in which the air is blown out from the blowing portion 45 has a vector component in a direction parallel to the yarn path (the longitudinal direction of the first yarn passage 34, the vertical direction in FIG. 5). The air blown to the side wall surface 35 in this direction flows vigorously in the longitudinal direction of the first yarn passage 34 along the side wall surface 35. Thereby, the side wall surface 35 of the 1st thread | yarn path 34 can be cleaned entirely.

  Further, as shown in FIG. 5, the blow-out portion 45 is configured to blow air from the upstream side to the downstream side in the traveling direction with respect to the side wall surface 35 of the first yarn passage 34. Thereby, the yarn waste adhering to the side wall surface 35 can be blown off toward the downstream side. According to this, the blown-off yarn waste is not returned to the yarn monitoring device 6 along with the traveling spun yarn 15.

  Moreover, the jet direction of the compressed air from the blow-out part 45 of this embodiment is set obliquely with respect to the side wall surface 35 when viewed in a direction parallel to the yarn path (see FIG. 6). That is, the direction in which the air is blown from the blow-out portion 45 has a vector component in the front-rear direction of the yarn monitoring device 6 (the depth direction of the first yarn passage 34, the vertical direction in FIG. 6). The air blown to the side wall surface 35 in this direction also flows in the depth direction of the first yarn passage 34 along the side wall surface 35. Thereby, the blown air from the blowing part 45 can be applied to a wider range of the side wall surface 35.

  Further, as shown in FIGS. 3 and 6, the blow-out portion 45 is disposed outside the first yarn passage 34. More specifically, when viewed in a direction parallel to the yarn path, the blowing portion 45 is disposed in front of the open end of the substantially U-shaped first yarn passage 34. Thereby, the blowing part 45 blows air toward the inside of the first yarn passage 34. Thus, by blowing air from the oblique direction toward the inside of the groove-shaped first yarn passage 34, a spiral air flow can be generated in the first yarn passage 34 (see FIG. 6). ).

  By the way, the blowing part 45 of this embodiment is comprised so that compressed air may be sprayed only to one side among the pair of side wall surfaces 35 and 35 which the 1st thread | yarn path 34 opposes. Therefore, the compressed air from the blowing part 45 does not directly hit the other side wall surface 35. However, as described above, by generating a spiral air flow in the first yarn passage 34, the air flow is also applied to the side wall surface 35 on the side where the compressed air is not directly blown from the blowing portion 45. Will act. Thereby, an air flow can be applied to both the pair of side wall surfaces 35 and 35. Therefore, both the transparent plate 39 and the light receiving surface of the light receiving element 38 can be cleaned by the air blown from the single blowing portion 45.

  Moreover, in this embodiment, the blowing part 45 is comprised so that compressed air may be ejected from a slit-shaped blowing port. Thereby, since the strip-shaped compressed air having a width can be blown onto the side wall surface 35, air can be applied to the side wall surface 35 in a wider range.

  Further, as shown in FIGS. 3, 5, and 7, the yarn monitoring device 6 of the present embodiment includes a cutter blowout unit 46 separately from the blowout unit 45. The cutter blow-out portion 46 is formed inside the second yarn passage 43 and is configured to blow compressed air against the cutter 16.

  The cutter blowout portion 46 can blow off a piece of the spun yarn 15 caught on the cutter 16. In addition, since the position where the cut end of the spun yarn 15 is caught on the cutter 16 is determined, it is more efficient to blow air at the pinpoint than the air is blown over the wide range. Therefore, the cutter blow-out portion 46 is configured as a round hole nozzle. Thereby, air can be blown to the cutter 16 at a pinpoint.

  As shown in FIG. 7, when viewed in a direction parallel to the yarn path, the cutter blow-out portion 46 is located at the closed end of the U-shaped second yarn passage 43 (at the back of the second yarn passage 43). Is formed. The cutter blow-out portion 46 is configured to blow out compressed air toward the open side of the second yarn passage 43 (toward the front). Thereby, the cut end of the spun yarn 15 caught on the cutter 16 can be blown out toward the outside of the second yarn passage 43.

  As described above, in the yarn monitoring device 6 of the present embodiment, the strip-shaped air is ejected from the slit-shaped air outlet to the side wall surface 35 so that the air acts on a wide range, and the cutter 16 is round. Air is blown from a hole-like nozzle at a pinpoint. Thus, since the method of spraying compressed air is varied according to the object, the removal of yarn waste and the like can be performed more effectively. As a result, since the cleaning effect can be obtained efficiently with a small flow rate, the consumption of compressed air can be reduced.

  Then, the specific structure of the blowing part 45 is demonstrated.

  As described above, the blowing portion 45 is configured to blow air in an oblique direction from the upstream side in the running direction of the spun yarn 15 to the side wall surface 35 of the first yarn passage 34 formed in the holder 30. . Therefore, the blowing part 45 should just be arrange | positioned in the running direction upstream from the holder 30, and the holder 30 and the blowing part 45 do not need to be arrange | positioned in the same position by the running direction.

  Therefore, in the yarn monitoring device 6 of the present embodiment, the blowout portion 45 is formed not in the first block 41 holding the holder 30 but in the second block 42 arranged on the upstream side of the first block 41. . Thus, since the blowing part 45 is not formed in the holder 30 and the 1st block 41, the holder 30 and the 1st block 41 can be comprised simply.

  As shown in FIG. 7 and the like, a compressed air supply hose 48 for supplying compressed air to the yarn monitoring device 6 is connected to the second block 42. Further, a supply path 49 for supplying compressed air from the compressed air supply hose 48 to the blow-out portion 45 is formed in the second block 42. In the present embodiment, the air supply path 50 to the cutter blow-out portion 46 is also formed in the second block 42. Thus, since the compressed air supply paths 49 and 50 are formed in the second block 42, it is not necessary to form an air supply path in the holder 30 and the first block 41. Therefore, the shapes of the holder 30 and the first block 41 can be configured simply.

  As described above, the yarn monitoring device 6 according to the present embodiment includes the holder 30, the detection unit, and the blowing unit 45. The holder 30 is formed with a first yarn passage 34 for allowing the spun yarn 15 traveling along a predetermined yarn path to pass therethrough. The detection unit detects the state of the spun yarn 15 in a part of the side wall surface 35 of the first yarn passage 34. The blowing part 45 blows compressed air in a predetermined jetting direction and blows it onto the side wall surface 35 of the first yarn passage 34. The ejection direction is set obliquely with respect to the side wall surface 35 when viewed in a direction perpendicular to the yarn path and parallel to the side wall surface 35.

  Thus, the compressed air that hits the side wall surface 35 flows along the side wall surface 35 by blowing the compressed air from the oblique direction to the side wall surface 35. Thereby, since an air flow can be made to act on the wide range of the side wall surface 35, the yarn waste adhering to the side wall surface 35 can be efficiently removed with a small flow rate.

  In the yarn monitoring device 6 of the present embodiment, the ejection direction is set obliquely with respect to the side wall surface 35 when viewed in a direction parallel to the yarn path.

  In this way, by blowing the compressed air so as to be inclined when viewed from another direction, the yarn waste on the side wall surface 35 can be removed in a wider range.

  In the yarn monitoring device 6 of the present embodiment, the first yarn passage 34 is formed in a groove shape along the yarn path, and the blowing portion 45 ejects compressed air toward the inside of the first yarn passage 34. .

  Thus, a helical flow is generated in the first yarn passage 34 by blowing the compressed air obliquely toward the inside of the groove-like first yarn passage 34. Thereby, the yarn waste on the side wall surface 35 can be more reliably removed with a smaller flow rate.

  In the yarn monitoring device 6 according to the present embodiment, the blowout unit 45 blows out compressed air from a slit-shaped blowout port.

  Thus, by ejecting the compressed air from the slit, a strip-shaped air flow can be applied to the side wall surface 35, so that the yarn waste can be removed in a wide range.

  In the yarn monitoring device 6 of the present embodiment, the blowing unit 45 ejects compressed air from the upstream side in the traveling direction of the spun yarn 15 toward the downstream side.

  If compressed air is blown from the downstream side to the side wall surface 35, yarn waste that should have been blown upstream by the compressed air may be returned to the spun yarn 15 that travels. . Therefore, as described above, by blowing compressed air from the upstream side to the side wall surface 35, the yarn waste is blown away to the downstream side, so that the yarn waste is not returned along with the spun yarn 15. Thereby, removal of yarn waste can be performed efficiently.

  The yarn monitoring device 6 according to the present embodiment includes a first block 41 having a holder 30 and a second block 42 having a blowing part 45. The first block 41 and the second block 42 are arranged side by side in a direction parallel to the yarn path. A compressed air supply path 49 for the blow-out portion 45 is formed in the second block 42.

  According to this, since it is not necessary to form the compressed air supply passage 49 in the first block 41 and the holder 30, the first block 41 and the holder 30 can be formed in a simple shape.

  The yarn monitoring device 6 according to the present embodiment includes a cutter 16 for cutting the spun yarn 15 and a cutter blowout portion 46 that blows compressed air against the cutter 16 in the second block 42.

  In this manner, by providing the cutter blow-out portion 46 separately from the blow-out portion 45, fluid can be sprayed to the cutter 16 at a pinpoint. Thereby, the broken end of the spun yarn 15 caught on the cutter 16 can be reliably removed. Further, by providing the second block 42 with the cutter 16 and the like, the first block 41 side can have a simple shape.

  Further, the spinning machine 1 of the present embodiment includes a winding unit 8 that winds the spun yarn 15 and a yarn monitoring device 6 that monitors the spun yarn 15 that is wound by the winding unit 8.

  The spinning machine 1 can reliably remove the yarn waste adhering to the first yarn passage 34 of the yarn monitoring device 6 with a small fluid flow rate. Therefore, the accuracy of yarn monitoring by the yarn monitoring device 6 can be maintained at a low cost, and the quality of the spun yarn 15 to be wound can be improved.

  The preferred embodiment of the present invention has been described above, but the above configuration can be modified as follows, for example.

  The configuration of the present application is not limited to the spinning machine, and can be applied to other types of yarn winding machines such as an automatic winder. The automatic winder is a device that unwinds the yarn of the yarn supplying bobbin and rewinds it on the winding bobbin while applying a predetermined tension to the yarn. By adopting the yarn monitoring device of the present invention in this automatic winder, the state of the yarn being rewound can be accurately monitored.

  In the above description, the yarn monitoring device has been described as an optical yarn monitoring device including one light emitting element and one light receiving element. However, the present invention is not limited thereto, and a plurality of light emitting elements and / or a plurality of light receiving elements are included. You may have. In the yarn monitoring device of the above embodiment, the thickness of the yarn is detected by monitoring the intensity of light blocked by the yarn. However, the present invention is not limited to this. For example, the intensity of reflected light from the yarn The presence or absence of foreign matter contained in the yarn may be detected by monitoring the length.

  The detection unit is not limited to the optical sensor, and may be configured to detect the state of the yarn using, for example, a capacitance sensor. Even in this case, if the yarn waste accumulates in the first yarn passage 34, the detection accuracy is lowered. Therefore, there is an advantage of removing the yarn waste by the above configuration.

  In the above embodiment, the yarn monitoring device 6 detects a portion where the yarn is abnormal (yarn defect), but the present invention is not limited to this. The yarn monitoring device may be configured to detect and monitor at least one state of the traveling yarn such as the traveling speed of the yarn and the traveling length of the yarn.

  The unit control unit 26 may be provided for each of the plurality of spinning units 2 instead of being provided for each spinning unit 2, and the plurality of spinning units 2 may be controlled by one unit control unit 26.

1 Spinning machine (yarn winding machine)
6 Yarn monitoring device 30 Holder (yarn passage forming member)
34 First thread passage (thread passage)
35 Side wall surface (wall surface)
41 1st block 42 2nd block 45 Air outlet

Claims (6)

A yarn passage forming member in which a yarn passage for passing a yarn traveling along a predetermined yarn path is formed;
A detection unit for detecting the state of the yarn in at least a part of the wall surface of the yarn passage;
A blow-out portion that blows out fluid in a predetermined jet direction and blows the fluid onto the wall surface of the yarn passage;
With
The yarn passage is formed in a groove shape along the yarn path,
The blowing portion is configured to eject the fluid toward the inside of the yarn passage and to spray the fluid only to one of the set of wall surfaces facing each other,
The jet direction, when perpendicular to the yarn path, and viewed in the wall parallel to the direction, with are set obliquely with respect to the wall surface, when viewed in a direction parallel to the yarn path Is set obliquely with respect to the wall surface . The yarn monitoring device according to claim 1,
The blowout unit ejects the fluid from a slit-shaped blowout port. The yarn monitoring device according to claim 1 or 2 ,
The said blow-out part spouts the said fluid toward the downstream from the upstream of the running direction of the said thread | yarn, The yarn monitoring apparatus characterized by the above-mentioned. The yarn monitoring device according to any one of claims 1 to 3 ,
A first block having the yarn passage forming member;
A second block arranged side by side with respect to the first block in a direction parallel to the yarn path, and having the outlet and the fluid supply path to the outlet;
A yarn monitoring device comprising: The yarn monitoring device according to claim 4 ,
A cutter for cutting the yarn;
A cutter outlet for spraying the fluid against the cutter;
Is provided in the second block. A winding unit for winding the yarn;
The yarn monitoring device according to any one of claims 1 to 5, wherein the yarn taken up by the winding unit is monitored.
A yarn winding machine comprising:

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