JP2017141106A - Yarn monitoring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently blow off fiber waste in the vicinity of an upstream side yarn passage regulation member arranged on a yarn running direction upstream side of a detection section in a yarn monitoring device.SOLUTION: A yarn monitoring device 6 includes: a detection section 70; an upstream side yarn guide 64 as an upstream side yarn passage regulation member. The detection section 70 detects the state of yarn 21 in a yarn running space 68 in which the yarn 21 runs. The upstream side yarn guide 64 is arranged on a yarn running direction upstream side of the detection section 70 so as to regulate the yarn passage to be a running position of the yarn 21 in the yarn running space 68. In the yarn monitoring device 6, a first air outlet 71 is formed to blow compressed air as a fluid to a region including at least the upstream side yarn guide 64. The first air outlet 71 includes a portion which is arranged on the yarn running direction downstream side of the upstream side yarn guide 64.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a yarn monitoring device that monitors the state of a traveling yarn. In detail, it is related with the structure for blowing away fiber waste in a thread | yarn monitoring apparatus.

  2. Description of the Related Art Conventionally, there has been known a yarn monitoring device having a configuration in which fiber waste in a yarn traveling space is blown away by blowing compressed air into the yarn traveling space in which the yarn travels. Patent document 1 discloses this kind of thread | yarn monitoring apparatus.

  In the yarn monitoring device of Patent Document 1, a yarn passage formed in a groove shape along the yarn traveling path is formed. The yarn monitoring device also includes a detection unit that detects the state of the yarn (such as the presence or absence of yarn defects) in the traveling space in which the yarn travels. A yarn path guide for restricting the traveling position of the yarn in the yarn traveling space is provided on the upstream side in the yarn traveling direction from the detection unit. The yarn monitoring device is further provided with a blowing unit, and compressed air is blown from the blowing unit toward the detection unit and the vicinity thereof. More specifically, the yarn passage has a pair of side wall surfaces arranged in parallel with each other across the yarn traveling path, and one of the pair of side wall surfaces is inclined from the blowout portion. By blowing the compressed air in the direction, the flow of air also acts on the other side wall surface or the like to prevent the fiber waste from staying in the yarn passage.

JP 2013-230908 A

  However, in the configuration of Patent Document 1 above, since the yarn path guide is disposed at a deep position in the yarn traveling space, the flow of compressed air blown obliquely from the blowing section reaches the vicinity of the yarn path guide. It can be difficult. In that case, there may occur a case where fiber waste stays in the vicinity of the yarn path guide. Therefore, development of the structure which can blow off fiber waste more efficiently is desired.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to efficiently remove fiber waste in the vicinity of an upstream yarn path regulating member disposed upstream of the detection unit in the yarn traveling direction in the yarn monitoring device. It is to blow well.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to an aspect of the present invention, a yarn monitoring device having the following configuration is provided. That is, this yarn monitoring device includes a detection unit and an upstream yarn path regulating member. The detection unit detects a state of the yarn in a yarn traveling space where the yarn travels. The upstream yarn path regulating member is disposed upstream of the detection unit in the yarn traveling direction, and regulates a yarn path that is a yarn traveling position in the yarn traveling space. The yarn monitoring device is formed with a first outlet for spraying a fluid to a region including at least the upstream yarn path regulating member. The first air outlet includes a portion arranged on the downstream side in the yarn traveling direction with respect to the upstream yarn path regulating member.

  As described above, the first air outlet includes a portion disposed on the downstream side in the yarn traveling direction with respect to the upstream yarn path regulating member, so that the fluid flows near the downstream side in the yarn traveling direction of the upstream yarn path regulating member. Is formed. Thereby, the fluid blown out from the first air outlet smoothly reaches the portion in the vicinity of the upstream yarn path regulating member. Therefore, the fiber waste in the vicinity of the upstream yarn path regulating member can be efficiently blown away by the fluid blown from the first blowout port. As a result, it is possible to prevent the fiber waste in the vicinity of the upstream yarn path regulating member from entering the detection region in the yarn traveling space along with the traveling yarn and staying in the detection region.

  In the yarn monitoring device, it is preferable that the downstream side in the yarn traveling direction coincides with the upper side in the vertical direction. Here, the upper side in the vertical direction is not limited to the upper side in the complete vertical direction, and a direction inclined at some angle with respect to the vertical direction is allowed. That is, the downstream side in the yarn traveling direction only needs to have at least a vertical upward component.

  Thereby, even if fiber waste accumulates on the upper side of the upstream yarn path regulating member due to its own weight (that is, downstream in the yarn traveling direction), the fiber waste is blown off by the fluid blown out from the first outlet. be able to. Further, it is possible to prevent the fiber waste accumulated on the upstream yarn path regulating member from entering the detection region with the yarn and staying in the detection region.

  In the yarn monitoring device, it is preferable that the first air outlet is formed in an elongated shape in the yarn traveling direction.

  Thereby, since a fluid can be strongly blown out from a 1st blower outlet over the comparatively wide range along a yarn running direction, the fiber waste of the vicinity of an upstream yarn path regulating member can be blown off favorably.

  The yarn monitoring device preferably has the following configuration. That is, the yarn monitoring device further includes a downstream yarn path regulating member. The downstream yarn path regulating unit is disposed downstream of the detection unit in the yarn traveling direction, and regulates the yarn path. The upstream-side yarn path regulating member and the downstream-side yarn path regulation are arranged such that a part of the blowing direction of the fluid blown out from the first blow-out port approaches the downstream side in the yarn traveling direction as the distance from the first blow-out port increases. It is inclined with respect to the yarn path defined by the member.

  As a result, the fiber waste is blown away from the vicinity of the upstream yarn path regulating member to the downstream side of the yarn path, so that the blown fiber waste is returned to the yarn traveling space along with the traveling yarn. Can be prevented.

  In the yarn monitoring device, it is preferable that a part of the blowing direction of the fluid blown out from the first blowout port is formed to be a direction toward the detection unit.

  Thereby, not only the vicinity of the upstream yarn path regulating member but also the detection unit can be cleaned at the same time by the fluid blown out from the first outlet.

  The yarn monitoring device preferably has the following configuration. That is, the yarn traveling space is formed by three sides surrounded by a pair of side walls and a back wall. The blowing direction of the fluid blown out from the first blowout port toward the detection unit is such that the blown fluid enters the yarn running space from the open side of the yarn running space, and the pair of side walls It forms so that it may become the direction sprayed on one side wall of these.

  As a result, the fluid blown out from the first blower outlet toward the detection unit enters the yarn running space from the opened side and is sprayed on one of the pair of side walls, thereby causing the yarn running. A fluid flow that swirls in the space is generated, and the fluid is also sprayed to the inner wall and the other side wall. Therefore, the yarn traveling space can be cleaned over a wide area.

  The yarn monitoring device preferably has the following configuration. That is, the detection unit includes a first sensor unit having a light projecting unit that emits light toward the yarn and a light receiving unit that receives the light emitted from the light projecting unit. When viewed in a direction along the yarn traveling direction, the blowing direction of the fluid blown from the first blower outlet toward the detection unit is such that the light emitting surface of the light projecting unit and the light receiving unit of the side wall are out of the side walls. It is formed so as to be directed to a position where any of the light incident surfaces is avoided.

  That is, if the light emitting surface of the light projecting unit or the light incident surface of the light receiving unit is contaminated, the detection result of the detecting unit may be affected. In this regard, in this configuration, since the fluid is blown out toward the position on the side wall where both the light emitting surface of the light projecting unit and the light incident surface of the light receiving unit are avoided, the fluid is assumed to be dirty. In addition, the detection performance of the first sensor unit can be maintained high.

  The yarn monitoring device preferably has the following configuration. That is, the detection unit further includes a second sensor unit that is disposed on the downstream side in the yarn traveling direction with respect to the first sensor unit. An end portion of the first air outlet on the downstream side in the yarn traveling direction is located upstream of the second sensor portion in the yarn traveling direction.

  As a result, the fluid blown out from the first blower outlet does not flow excessively toward the second sensor portion, so that the fluid blown out from the first blower outlet is intensively blown to the region including the upstream yarn path regulating member. And this area can be cleaned intensively and efficiently.

  The yarn monitoring device preferably has the following configuration. In other words, the yarn monitoring device further includes a cutting unit and a second air outlet. The cutting portion is disposed upstream of the upstream yarn path regulating member in the yarn traveling direction and cuts the yarn traveling in the yarn traveling space. The second air outlet is provided to spray fluid toward the cutting portion. The second air outlet is formed on the upstream side in the yarn traveling direction with respect to the upstream yarn path regulating member.

  Thereby, since a cutting | disconnection part is cleaned not by the 1st blower outlet but by the fluid blown off from the 2nd blower outlet, the 1st blower outlet is used for the removal of the fiber waste related to the detection performance of a 1st sensor part. The dedicated fluid outlet can be used. Therefore, the first air outlet is disposed at a position suitable for blowing away fiber waste near the upstream yarn path regulating member, or the shape of the first air outlet is blown away near the upstream yarn path regulating member. It can be made into a shape suitable for. Therefore, each place can be appropriately cleaned by the fluid blown out from the individual outlets.

  The yarn monitoring device preferably has the following configuration. That is, the yarn traveling space is formed by three sides surrounded by a pair of side walls and a back wall. The blowing direction of the fluid blown out from the second blower outlet is formed to be a direction toward the opened side of the yarn traveling space.

  Thereby, the fiber waste in the yarn traveling space can be blown out of the yarn traveling space by blowing out the fluid from the second outlet.

  The yarn monitoring device preferably has the following configuration. That is, the yarn monitoring device includes a downstream yarn path regulating member. The downstream yarn path regulating member is disposed downstream of the detection unit in the yarn traveling direction and regulates the yarn path. In the standby state in which the yarn is not cut, the cutting portion, when viewed in a direction perpendicular to the back wall, from the yarn path defined by the upstream yarn path regulating member and the downstream yarn path regulating member The blowing direction of the fluid which is arranged at the shifted position and is blown out from the second blowing outlet is formed to be a direction toward the cutting portion in the standby state without passing through the yarn path.

  As a result, the fluid blown from the second outlet can be appropriately blown and cleaned against the cut portion in the standby state that does not cut the yarn. Further, there is an advantage that the yarn is not shaken even if the fluid blown from the second air outlet is blown to the cutting portion while the yarn is running.

  The yarn monitoring device preferably has the following configuration. That is, the yarn monitoring device further includes a fluid introduction port and a fluid flow path. A fluid is introduced into the fluid introduction port. The fluid flow path guides the fluid introduced from the fluid inlet to the first outlet and the second outlet. The fluid flow path includes an introduction path, a first flow path, a second flow path, and an intermediate path. The fluid introduction port is formed at one end of the introduction path. The first air outlet is formed at one end of the first flow path. The second outlet is formed at one end of the second flow path. The other end of the introduction path, the other end of the first flow path, and the other end of the second flow path are connected to the intermediate path at different positions. The intermediate path extends in a direction different from any of a direction in which the introduction path extends, a direction in which the first flow path extends, and a direction in which the second flow path extends. In the intermediate path, the other end of the second flow path is located downstream of the other end of the introduction path in the fluid flow direction.

  Thus, by appropriately setting the diameters and cross-sectional areas of the first air outlet and the second air outlet and the respective flow paths, the fluid introduced from the fluid inlet is blown out from the first air outlet. , And can be appropriately distributed to the amount blown out from the second blow-out port. Thereby, each of the flow volume of the fluid sprayed from the 1st blower outlet toward an upstream yarn path regulation member and a detection part, and the flow rate of the fluid blown toward a cutting part from the 2nd blower outlet become appropriate. Any place can be suitably cleaned.

  In the yarn monitoring device, it is preferable that an opening connecting the first flow path to the intermediate path is larger than an opening connecting the second flow path to the intermediate path.

  Thereby, the flow rate of the fluid flowing in the first flow path can be made larger than the flow rate of the fluid flowing in the second flow path, and as a result, the amount of the fluid blown out toward the region including the upstream yarn path regulating member Can be made larger than the amount of fluid blown out toward the cutting portion. In this way, a large amount of fluid is supplied to the region including the upstream yarn path regulating member that is desired to spray fluid over a wide range, and a small amount is applied to the cutting portion that is desired to spray fluid at a pinpoint. By supplying this fluid, the object to be cleaned can be efficiently cleaned without wasting fluid.

The front view which shows the whole structure of an automatic winder provided with the thread | yarn monitoring apparatus which concerns on one Embodiment of this invention. The side view of a winder unit provided with a yarn monitoring device. The external appearance perspective view of a thread | yarn monitoring apparatus. The external appearance front view of a thread | yarn monitoring apparatus. The typical plane sectional view of the 1st casing and the inside. The typical top view of a 2nd casing and its inside. The front view which shows the structure of the slot formed in a thread | yarn monitoring apparatus, and its periphery. The top view of the flow-path member with which a yarn monitoring apparatus is provided. AA line sectional view in FIG. BB sectional drawing in FIG. The projection figure which shows a mode that the distribution flow path of the compressed air in a yarn monitoring apparatus was projected on the virtual plane perpendicular | vertical to a yarn running direction. The projection figure which shows a mode that the distribution flow path of compressed air was projected on the virtual plane perpendicular | vertical to a thread | yarn running direction in the thread | yarn monitoring apparatus which concerns on a modification.

  Next, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, an automatic winder (yarn winding machine) 1 includes a plurality of winder units (yarn winding units) 10 arranged side by side, and a machine base control unit 11 arranged at one end in the arranged direction. Is mainly provided.

  The machine base control unit 11 includes a display device 12 that can display information regarding each winder unit 10, an instruction input unit 13 for an operator to input various instructions to the machine base control unit 11, and the like. . The operator of the automatic winder 1 checks various displays displayed on the display device 12 and manages the plurality of winder units 10 collectively in the machine base control unit 11 by appropriately operating the instruction input unit 13. be able to.

  Each winder unit 10 shown in FIGS. 1 and 2 is configured to unwind the yarn 21 from the yarn feeding bobbin 20 and to wind it back to the winding bobbin 22. A state in which the yarn 21 is wound around the winding bobbin 22 is referred to as a package 23. In the following description, “upstream side in the yarn traveling direction” and “downstream side in the yarn traveling direction” mean the upstream side and the downstream side when viewed in the traveling direction of the yarn 21, respectively.

  As shown in FIG. 2, the winder unit 10 mainly includes a main body frame 24, a yarn supplying unit 25, and a winding unit 26.

  The main body frame 24 is disposed on the side of the winder unit 10. Most of the configuration of the winder unit 10 is supported directly or indirectly by the main body frame 24. In addition, an operation unit 27 for an operator to operate is provided on the front side of the main body frame 24.

  The yarn supplying section 25 is configured to be able to hold the yarn supplying bobbin 20 for supplying the yarn 21 in an upright state. The winding unit 26 includes a cradle 28 and a winding drum 29.

  The cradle 28 rotatably supports the take-up bobbin 22. The cradle 28 is configured so that the peripheral surface of the supported winding bobbin 22 can be brought into contact with the peripheral surface of the winding drum 29. The take-up drum 29 is disposed to face the take-up bobbin 22 and is configured to be driven to rotate by a motor (not shown). A reciprocating spiral traverse groove (not shown) for traversing the yarn 21 wound around the winding bobbin 22 is formed on the outer peripheral surface of the winding drum 29.

  The winding bobbin 22 is driven to rotate by rotating the winding drum 29 while the outer peripheral surface of the winding bobbin 22 is in contact with the winding drum 29. Thereby, the yarn 21 unwound from the yarn supplying bobbin 20 can be wound around the winding bobbin 22 while traversing the traverse groove. The configuration for traversing the yarn 21 is not limited to the winding drum 29 described above. For example, instead of this, an arm-type traverse device that guides the yarn 21 by a traverse guide that is reciprocally driven with a predetermined traverse width. You may comprise by.

  Each winder unit 10 includes a unit controller 30. The unit control unit 30 includes hardware such as a CPU, ROM, and RAM, and software such as a control program stored in the RAM. The hardware and software cooperate to control each configuration of the winder unit 10. The unit control unit 30 of each winder unit 10 is configured to be able to communicate with the machine base control unit 11. As a result, the operation of each winder unit 10 can be centrally managed by the machine control unit 11.

  Further, the winder unit 10 includes, in order from the upstream side in the yarn traveling direction, in the yarn traveling path between the yarn supplying unit 25 and the winding unit 26, the unwinding assisting device 31, the tension applying device 32, and the yarn joining device. 33 and the yarn monitoring device 6 are arranged.

  The unwinding assisting device 31 has a regulating member 35 that comes into contact with a portion (balloon) swelled outward by the yarn 21 unwound from the yarn feeding bobbin 20 being swung by centrifugal force. By restricting the yarn 21 from being excessively swung by bringing the regulating member 35 into contact with the balloon, the yarn 21 from the yarn feeding bobbin 20 is unwound by keeping the balloon at a certain size. Can be done.

  The tension applying device 32 applies a predetermined tension to the traveling yarn 21. As the tension applying device 32 of the present embodiment, a gate type device is used in which movable comb teeth are arranged with respect to fixed comb teeth. The tension applying device 32 applies an appropriate tension to the yarn 21 by allowing the yarn 21 to pass while bending between the interdigitated comb teeth. For the tension applying device 32, for example, a disc type device can be adopted in addition to the gate type device as described above.

  When the yarn 21 between the yarn feeding bobbin 20 and the take-up bobbin 22 is cut by, for example, a cutting device (cutter) 16 described later, the yarn joining device 33 is in a divided state. The 20-side yarn (lower yarn) and the winding bobbin 22-side yarn (upper yarn) are joined (yarn spliced). The configuration of the yarn joining device 33 is not particularly limited. For example, an air-type splicer that twists yarn ends together by a swirling airflow generated by compressed air can be used, or a mechanical knotter or the like can be used. You can also. The upper yarn suction pipe (first yarn catching and guiding device) 44 sucks and catches the yarn end on the winding bobbin 22 side (winding portion 26 side) and guides it to the yarn joining device 33. The lower yarn suction pipe (second yarn catching and guiding device) 45 sucks and catches the yarn end on the yarn feeding bobbin 20 side (yarn feeding portion 25 side) and guides it to the yarn joining device 33.

  The yarn monitoring device 6 is configured to monitor the state (quality) of the traveling yarn 21 and detect a yarn defect or the like (location where the yarn 21 is abnormal) included in the yarn 21. The yarn monitoring device 6 is provided with a cutting device 16 for cutting the yarn 21 when a yarn defect or the like is detected in the monitored yarn.

  Next, an operation when a yarn defect or the like is detected by the yarn monitoring device 6 will be briefly described with reference to FIG.

  When the yarn monitoring device 6 detects a yarn defect or the like in the monitored yarn 21, the yarn monitoring device 6 transmits a yarn defect detection signal to the unit control unit 30 described above and operates the cutting device 16 to cut the yarn 21. The yarn 21 on the downstream side of the cut portion is once wound around the package 23. At this time, the yarn 21 wound around the package 23 includes a portion such as a yarn defect detected by the yarn monitoring device 6. Furthermore, the unit control unit 30 stops the winding of the yarn in the winding unit 26.

  The lower yarn suction pipe 45 sucks and captures the yarn end fed from the yarn feeding bobbin 20 and guides it to the yarn joining device 33. Before and after this, the upper thread suction pipe 44 sucks and captures the thread end wound around the package 23 and guides it to the yarn joining device 33. At this time, a portion such as a yarn defect wound around the package 23 is sucked and pulled out by the upper yarn suction pipe 44.

  The yarn joining device 33 joins the yarn ends guided by the upper yarn suction pipe 44 and the lower yarn suction pipe 45. As a result, the yarn 21 cut by the cutting device 16 becomes continuous again after the portion including the yarn defect or the like is removed.

  When the yarn joining operation in the yarn joining device 33 is completed, the unit control unit 30 resumes the winding of the yarn 21 by the winding unit 26. With the above operation, the yarn defect detected by the yarn monitoring device 6 can be removed, and the winding of the yarn 21 onto the package 23 can be resumed.

  Next, the configuration of the yarn monitoring device 6 according to the present embodiment will be described in detail with reference to FIGS. 3 to 11.

  As shown in FIGS. 3 to 5, the yarn monitoring device 6 of the present embodiment includes a first casing 66, a second casing 67, a top plate 63, and an upstream yarn guide (upstream yarn path regulating member). 64, a downstream yarn guide (downstream yarn path regulating member) 65, a detection unit 70, a cutting device 16 (see FIGS. 2 and 6), and a monitoring control unit 200 are mainly provided.

  The first casing 66 (detection unit holding unit) is a casing that at least partially accommodates the detection unit 70. The first casing 66 is made of resin, for example. In the present embodiment, the first casing 66 accommodates the entire detection unit 70.

  The detection unit 70 detects the state of the yarn 21 in the yarn traveling space 68 in which the yarn 21 travels. As shown in FIGS. 3 and 4, the detection unit 70 includes a holder 69, a first sensor unit 51, and a second sensor unit 52. The first sensor unit 51 and the second sensor unit 52 are held by a holder 69 placed on the first casing 66. Note that the detection unit 70 can be rephrased as a measurement unit that measures the state of the yarn 21.

  In this embodiment, the 1st sensor part 51 is comprised so that the state (The thickness of a thread | yarn, the presence or absence of a thread | yarn defect, etc.) of the said thread | yarn 21 may be detected by irradiating the thread | yarn 21 with light. The first sensor unit 51 includes a light emitting element (light projecting part) 37 and a light receiving element (light receiving part) 38. The light emitting element 37 is composed of, for example, an LED. The light receiving element 38 is configured as a photodiode, for example, and converts the intensity of the received light into an electric signal and outputs it.

  The second sensor unit 52 is disposed downstream of the first sensor unit 51 in the yarn traveling direction. The second sensor unit 52 of the present embodiment is configured as a so-called optical sensor similar to the first sensor unit 51.

  The second casing 67 shown in FIGS. 3, 4, and 6 is a casing that holds the cutting device 16 included in the yarn monitoring device 6 in order to cut the yarn 21. That is, the cutting device 16 is at least partially accommodated in the second casing 67. The second casing 67 also accommodates a flow path member 90 described later at least partially. The flow path member 90 is a metal plate-like member. The second casing 67 is made of, for example, resin.

  The cutting device 16 includes a blade (cutting unit) 81 and a drive mechanism 80 for driving the blade 81. As shown in FIG. 6, a blade 81 is connected to the drive mechanism 80, and the tip portion (blade tip 81a) of the blade 81 is in an internal space of a slot 6a described later (in other words, in a yarn traveling space 68 described later). Exposure is possible. The drive mechanism 80 is configured, for example, as a solenoid, and with the drive of the drive mechanism 80, the blade edge 81a of the blade 81 of the cutting device 16 enters the yarn path on which the yarn 21 travels or retreats with respect to the yarn path. You can make it. In the following description, the state where the blade 81 is retracted from the yarn path may be referred to as a “standby state”. The flow path member 90 also functions as a table (blade receiving portion) that receives the blade edge 81a.

  The top plate 63 shown in FIGS. 3 and 4 is a metal thin plate material whose outer shape when viewed along the yarn traveling direction is a shape along the outer shape of the first casing 66. The first casing 66 is fitted on the upper side of the second casing 67 (downstream side in the yarn traveling direction). On the upper side of the first casing 66 (downstream side in the yarn traveling direction), the top plate 63 is fixed in a state of being positioned by an appropriate method.

  As shown in FIG. 3, the yarn monitoring device 6 is formed with slots 6a along the yarn traveling direction. The slot 6a is formed in a groove shape having one side (front side) opened when viewed along the yarn traveling direction. In other words, the slot 6a is formed so as to penetrate the yarn monitoring device 6 in the yarn traveling direction, and is configured such that the yarn 21 can be inserted from the opened one side (front side). The slot 6a is constituted by three inner walls (a back wall 6b and a pair of side walls 6c and 6d). A yarn traveling space 68 is formed inside the slot 6a (enclosed by three inner walls). The yarn traveling space 68 is a space in which the yarn 21 to be monitored by the yarn monitoring device 6 can travel.

  In the present embodiment, a slot 69 a is formed in the holder 69 (see FIG. 5) placed on the first casing 66, a slot 67 a is formed on the upstream side of the first casing 66, and a slot 63 a is formed in the top plate 63. Has been. When each member constituting the yarn monitoring device 6 is accommodated in the first casing 66 and the second casing 67 and the top plate 63 is assembled to the first casing 66, the slots 69a, 67a, 63a are connected as shown in FIG. Thus, one slot 6a is formed as a whole.

  The slot 6a will be described in more detail. The slot 69a formed inside the first casing 66 (mainly formed in the holder 69 placed on the first casing 66 in this embodiment) has three slots 69a. It is constituted by an inner wall and one side (front side) is open. Here, the three inner walls include a back wall 69b facing the open side of the yarn traveling space 68 and a pair of side walls 69c and 69d which are inner walls other than the back wall 69b. In each of the pair of side walls 69c and 69d, the end (rear end) opposite to the open side is connected to the back wall 69b. The pair of side walls 69c and 69d are arranged to face each other.

  Similarly, the slot 67a formed on the upstream side of the first casing 66 is also composed of three inner walls (the back wall 67b and the pair of side walls 67c and 67d), and one side (front side) is open. In the present embodiment, the back wall 67 b is configured by the back wall 90 b of the flow path member 90. The side wall 67c on one side (right side) of the side walls 67c and 67d is constituted by a portion (a portion to which the blade 81 is attached) facing the yarn traveling space 68 of the cutting device 16 held by the second casing 67. The The side wall 67d on the other side (left side) of the side walls 67c and 67d is constituted by a portion of the flow path member 90 that receives the cutting edge 81a.

  The slot 63a of the top plate 63 is also formed in a groove shape with one side (front side) opened.

  With this configuration, the first casing 66, the second casing 67, and the top plate 63 that house the members constituting the yarn monitoring device 6 are fixed to each other, so that the three slots 69a, 67a, 63a are integrated into one. Two slots 6a are formed. The specific configuration of the slot 6a is not limited to the above-described configuration, and various changes can be made without departing from the spirit of the present invention.

  The upstream yarn guide 64 is for regulating the yarn path on which the yarn 21 travels within the yarn traveling space 68. The upstream-side yarn guide 64 has a shape having a substantially V-shaped groove when viewed along the yarn running direction, and the holder 69 has the open side aligned with the open side of the slot 6a. It is attached so as to protrude inward from the back wall 69b. The upstream thread guide 64 is attached to the upstream end of the holder 69. The upstream yarn guide 64 is disposed upstream of the detection unit 70 (particularly, the first sensor unit 51) in the yarn traveling direction. The cutting device 16 is disposed upstream of the upstream yarn guide 64 in the yarn traveling direction.

  The downstream side yarn guide 65 is also for restricting the yarn path on which the yarn 21 travels in the yarn traveling space 68. The downstream yarn guide 65 has the same shape as the upstream yarn guide 64. The downstream yarn guide 65 is attached to the downstream end of the holder 69. The downstream yarn guide 65 is disposed downstream of the detection unit 70 in the yarn traveling direction.

  The upstream yarn guide 64 and the downstream yarn guide 65 are made of a wear-resistant material (in this embodiment, ceramic). As shown in FIG. 4, the yarn 21 traveling in the yarn traveling space 68 travels while contacting the bottoms of the substantially V-shaped grooves of the yarn guides 64 and 65. Thereby, since the yarn path along which the yarn 21 travels with respect to the yarn monitoring device 6 is stabilized, the state of the yarn 21 can be stably monitored by the detection unit 70.

  Next, the configuration of the detection unit 70 assembled to the holder 69 will be described more specifically with reference to FIGS. 4, 5, and 7.

  As described above, in the holder 69, the first sensor unit 51 is disposed upstream of the second sensor unit 52 in the yarn traveling direction.

  As shown in FIG. 5, a light receiving element 38 is disposed on a part of the side wall 69c of the slot 69a formed in the yarn monitoring device 6 (holder 69). In the light receiving element 38, the surface exposed to the internal space of the slot 69a constitutes a light incident surface (incident surface). Further, a resin-made transparent plate 39 (a plate through which light passes) is fitted in the side wall 69d opposite to the side wall 69c on which the incident surface is disposed, and is opposite to the yarn traveling space 68 across the transparent plate 39. A light emitting element 37 is disposed (inside the holder 69). The light emitting element 37 and the light receiving element 38 are disposed so as to face each other across the yarn path. A part of the side wall 69d is formed with a surface (outgoing surface) through which light from the light emitting element 37 passes through the transparent plate 39. However, the entrance surface may be formed on the side wall 69d of the slot 69a, and the exit surface may be formed on the side wall 69c of the slot 69a. There may be a transparent plate in front of the light receiving element 38.

  The light emitting element 37 irradiates light into the yarn traveling space 68 (toward the light receiving element 38) through the transparent plate 39. The light emitting element 37 and the light receiving element 38 are disposed so as to face each other across the yarn path. A monitoring control unit 200 for causing the light receiving element 38 and the light emitting element 37 to function is housed in the first casing 66.

  With the above configuration, a part of the light from the light emitting element 37 is blocked by the yarn 21 traveling in the yarn traveling space 68 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 thread 21. Therefore, the yarn monitoring device 6 can detect a yarn defect or the like by detecting the thickness of the yarn 21 based on the intensity of light received by the light receiving element 38. However, the light receiving element 38 may be disposed so as to receive light reflected by the thread 21. In the present embodiment, a detection signal output by the light receiving element 38 in accordance with the amount of received light is input to the monitoring control unit 200, and the monitoring control unit 200 can find a yarn defect or the like by calculating the signal.

  Further, the yarn monitoring device 6 is provided with a configuration for cleaning the upstream yarn guide 64, the first sensor unit 51, and the cutting device 16. The yarn monitoring device 6 blows compressed air (fluid) from the first air outlet 71 to the upstream yarn guide 64 and the first sensor unit 51, and from the second air outlet 72 to the blade 81 of the cutting device 16. The upstream yarn guide 64, the first sensor unit 51, and the blade 81 of the cutting device 16 are cleaned by blowing compressed air and blowing away fiber waste.

  Hereinafter, a configuration for cleaning the upstream yarn guide 64, the first sensor unit 51, and the blade 81 of the cutting device 16 will be described in detail with reference to FIGS.

  The yarn monitoring device 6 includes a compressed air inlet (fluid inlet) 73, a first outlet 71, a second outlet 72, and a distribution channel (fluid channel) 100. The compressed air introduction port 73, the first air outlet 71, the second air outlet 72, and the distribution channel 100 are a first casing 66, a second casing 67, and members accommodated in these casings included in the yarn monitoring device 6. It is formed in either.

  As shown in FIG. 6, the compressed air introduction port 73 is an opening (inlet) into which compressed air is introduced. In the present embodiment, the compressed air introduction port 73 is formed on the surface (back surface) opposite to the open side of the slot 6 a in the yarn monitoring device 6. A hose 48 for supplying compressed air is connected to the compressed air introduction port 73.

  As shown in FIGS. 4, 5, and 7, the first air outlet 71 is an air outlet (opening) for blowing compressed air toward the upstream yarn guide 64 and the first sensor unit 51. In other words, the 1st blower outlet 71 is a blower outlet for spraying compressed air on the area | region containing the upstream yarn guide 64 at least. The 1st blower outlet 71 is formed in the downstream end of the 1st flow path 91 mentioned later.

  The 1st blower outlet 71 is located in the outer side of the slot 6a, and the vicinity of the open side.

  The first air outlet 71 includes a portion that is disposed downstream of the upstream yarn guide 64 in the yarn traveling direction. That is, as shown in FIG. 7, when a virtual plane P1 perpendicular to the yarn traveling direction that contacts the upper end of the upstream yarn guide 64 (end on the downstream side of yarn traveling) is considered, most of the first outlet 71 is These are disposed above the virtual plane P1 (downstream in the yarn traveling direction). By configuring the first air outlet 71 as described above, the compressed air blown from the first air outlet 71 flows in the vicinity of the upstream side yarn guide 64 in the yarn traveling direction downstream side. Thereby, the compressed air blown out from the first outlet 71 smoothly reaches a portion in the vicinity of the upstream yarn guide 64.

  In addition, Preferably, the half or more part of the 1st blower outlet 71 is arrange | positioned above the virtual plane P1 (downstream direction of a thread | yarn running). More preferably, 75% or more of the first outlet 71 is disposed above the virtual plane P1. More preferably, 90% or more of the first air outlet 71 is disposed above the virtual plane P1. In this way, by increasing the portion of the first air outlet 71 that is disposed above the virtual plane P1, the compressed air blown out from the first air outlet 71 is smoother in the downstream portion of the upstream yarn guide 64. To reach.

  When viewed in a direction along the yarn traveling direction, the direction in which the compressed air is blown out from the first air outlet 71 is the direction approaching the first sensor unit 51 as shown in FIG. It is directed to a position slightly shifted from the transparent plate 39 in the side wall 6d on one side of 6a. More specifically, the compressed air blown from the first air outlet 71 is directed toward the first sensor unit 51, but the blown compressed air emits or enters the light from the first sensor unit 51. It is oriented so that it does not hit directly. The 1st blower outlet 71 blows off compressed air so that it may contact | win one side wall 6d of the slot 6a directly. At least a part of the compressed air blown out is blown out in a direction inclined with respect to the side wall 6d. Below, the direction (each of the direction of the thick line arrow shown in FIG.5 and FIG.7) where compressed air blows off from the 1st blower outlet 71 may be called a 1st blowout direction. As shown in FIG. 7, the first blowing direction changes depending on the position in the yarn traveling direction, and in some cases, the direction is perpendicular to the side wall 6d of the slot 6a. Some are inclined to the side.

  When viewed in a direction along the yarn traveling direction, at least a part of the first blowing direction is inclined with respect to the side walls 6c and 6d of the slot 6a as shown in FIG. Therefore, the compressed air blown out from the first air outlet 71 enters the yarn traveling space 68 from the open side of the slot 6a and is slightly displaced from the transparent plate 39 in one side wall 6d of the slot 6a (transparent plate 39 to a position closer to the open side of the slot 6a.

  When viewed in a direction perpendicular to the inner wall 6b of the slot 6a, as shown in FIG. 7 and the like, the first air outlet 71 is formed in an elongated shape in the yarn traveling direction. Thereby, compressed air can be blown out with a certain amount of width.

  Further, when viewed in a direction perpendicular to the inner wall 6b of the slot 6a, a trapezoidal guide surface 71a for guiding the compressed air blown from the first air outlet 71 is continuously connected to the first air outlet 71. Is provided. Of the two sets of opposite sides of the trapezoid formed by the guide surface 71a, the opposite sides parallel to each other are oriented along the yarn traveling direction. A compressed air outlet (first air outlet 71) is provided to be elongated along the shorter side (short side) of the parallel opposite sides, and the compressed air blown out from the first air outlet 71 is It flows along the guide surface 71a. Of the remaining opposite sides of the guide surface 71a, the upstream side in the yarn traveling direction is substantially perpendicular to the yarn path, while the downstream side in the yarn traveling direction is closer to the downstream side in the yarn traveling direction as it approaches the slot 6a. It is inclined with respect to the yarn path. A ceiling surface (second guide surface) 71b formed with the side on the downstream side in the yarn traveling direction of the guide surface 71a as one side, and a floor surface (third guide surface) formed with the side on the upstream side in the yarn traveling direction as one side. By being guided by 71c, the compressed air blown out from the first blower outlet 71 flows in the first blowout direction (toward the longer of the parallel opposite sides of the guide surface 71a). . The ceiling surface 71b is a plane that extends in a direction parallel to the downstream side of the guide surface 71a in the yarn traveling direction and in the depth direction (front-rear direction) of the yarn monitoring device 6. The floor surface 71 c is a plane that extends in the direction parallel to the upstream side of the guide surface 71 a in the yarn traveling direction and in the depth direction of the yarn monitoring device 6.

  Accordingly, when viewed in a direction perpendicular to the inner wall 6b of the slot 6a, the direction in which the compressed air is blown out from the first outlet 71 (first blowing direction) is the position in the yarn traveling direction as shown in FIG. Depending on the situation, some of the slots 6a may be perpendicular to the side wall 6d of the slot 6a, and some may be inclined toward the downstream side in the yarn traveling direction as the side wall 6d is approached. As a result, compressed air can be blown over a wide range toward the yarn traveling space 68 formed by the slot 6a. Of the compressed air blown to the one side wall 6d from the first blower outlet 71, the inclined air as described above swirls spirally in the slot 6a after passing through the downstream side of the upstream yarn guide 64. And it is sprayed indirectly also to the back wall 6b and the other side wall 6c in the part in which the 1st sensor part 51 is arrange | positioned. Further, when the fiber waste adhering to the surface on the downstream side in the yarn traveling direction of the upstream yarn guide 64 is separated by the compressed air being blown, the fiber waste flows in a spiral manner as described above. And is blown off to the downstream side of the yarn path. Accordingly, it is possible to prevent the fiber scraps once blown away from being returned to the upstream yarn guide 64 by the traveling yarn 21.

  In this way, by blowing the compressed air from the first outlet 71 toward the region including the upstream yarn guide 64, the upstream yarn guide 64 in the yarn traveling direction, which has not reached the compressed air in the conventional configuration, is used. Compressed air can be made to act strongly immediately downstream. Thereby, the fiber waste adhering to the upstream yarn guide 64 can be well blown away by the flow of compressed air blown from the first blower outlet 71.

  The yarn 21 is traveling upward in the yarn traveling space 68. However, the fiber waste may fall due to its own weight and accumulate on the upper side of the upstream yarn guide 64 (that is, on the downstream side in the yarn traveling direction). is there. However, in the present embodiment, this can be removed by blowing away with the flow of compressed air blown from the first blower outlet 71, and the fiber waste adhering to the upstream yarn guide 64 is taken along by the yarn 21 to the yarn traveling space. It is possible to prevent entering into the detection region in 68 and staying in the detection region.

  Moreover, since the 1st blower outlet 71 is blowing compressed air not only to the upper side of the upstream thread | yarn guide 64 but also to the 1st sensor part 51, an upstream thread | yarn guide is by one blower outlet (1st blower outlet 71). Not only the vicinity of 64 but also the first sensor unit 51 can be cleaned. That is, a portion related to the detection performance of the first sensor unit 51 can be cleaned over a wide range by this one air outlet (first air outlet 71).

  Further, since the compressed air is not directly blown (indirectly blown) on the light receiving element 38 or the transparent plate 39, even if the cleanliness of the compressed air is low, the light receiving element is caused by dirt carried by the compressed air. It is possible to prevent the detection performance of the detection unit 70 from being deteriorated due to contamination of the plate 38 or the transparent plate 39 (light incident surface and light exit surface).

  As shown in FIG. 7, the end (upper end) of the first air outlet 71 on the downstream side in the yarn traveling direction is located on the upstream side (lower side) in the yarn traveling direction with respect to the second sensor unit 52. Therefore, it is possible to prevent the compressed air blown out from the first blower outlet 71 from excessively flowing to the second sensor unit 52 side. Thereby, since the compressed air blown out from the 1st blower outlet 71 can be intensively sprayed to the area | region containing the upstream yarn guide 64, the said area | region can be cleaned intensively and efficiently.

  The compressed air is supplied from the compressed air inlet 73 to the first outlet 71 via the distribution channel 100. The compressed air supply path will be described later.

  As shown in FIG. 6, the 2nd blower outlet 72 is a blower outlet (opening) which blows out (injects) compressed air so that it may blow toward the blade edge | tip 81a of the blade 81 of the cutting device 16. As shown in FIG.

  The second air outlet 72 is formed in a portion of the flow path member 90 that forms the inner wall 67b of the slot 67a when assembled in a state of being accommodated in the second casing 67. As shown in FIG. 6, the second outlet 72 is disposed at a position shifted from the yarn path when viewed in the depth direction of the slot 67a (when viewed in a direction perpendicular to the back wall 67b). ing. The direction in the vicinity of the outlet of the second outlet 72 is directed straight to the cutting edge 81a of the blade 81 in a standby state retracted from the yarn path. In other words, the 2nd blower outlet 72 blows off compressed air in the direction which goes straight to the open side of the slot 6a. Below, this direction may be called a 2nd blowing direction.

  The cutting edge 81a of the blade 81 in the standby state is disposed on the extended line in the second blowing direction. The outline of the 2nd blower outlet 72 is made circular, The diameter becomes like this. Preferably it is 1.0 mm or less, More preferably, it is 0.6 mm or less. Thereby, the compressed air blown out from the second outlet 72 can be blown to the cutting edge 81a of the blade 81 of the cutting device 16 at a pinpoint. The cutting edge 16a of the blade 81 of the cutting device 16 is generally a place where the cut end of the thread 21 is easily caught, and by blowing compressed air to the portion at a pinpoint, the cutting device 16 is efficiently required with a small flow rate. The part can be cleaned.

  As shown in FIG. 7, the second air outlet 72 is formed on the upstream side (lower side) in the yarn traveling direction with respect to the upstream yarn guide 64, and compressed air is blown onto the upstream yarn guide 64. Absent. That is, the second air outlet 72 is configured as a dedicated air outlet for cleaning the cutting device 16. As described above, each of the outlets (the first outlet 71 or the second outlet 72) is exclusively used for cleaning the object to be cleaned (the upstream yarn guide 64 and the first sensor unit 51 or the cutting device 16). Since it is set as a blower outlet, each blower outlet can be designed in the optimal arrangement | positioning and shape which can clean each cleaning object appropriately.

  The compressed air is supplied from the compressed air inlet 73 to the second outlet 72 via the distribution channel 100. The compressed air supply path will be described later.

  Next, the distribution channel 100 will be briefly described with reference to FIGS.

  The distribution channel 100 is a channel that guides the compressed air introduced from the compressed air introduction port 73 to the first air outlet 71 and the second air outlet 72. The distribution flow path 100 includes an introduction path 93, a first flow path 91, a second flow path 92, and an intermediate path 94.

  As shown in FIG. 8, in the distribution channel 100, at least part of the introduction channel 93, the first channel 91, the second channel 92, and the intermediate channel 94 are partially accommodated in the second casing 67. It is formed in the flow path member 90 which is a metal member. The flow path member 90 is formed in a flat plate shape having a recess 90a. When the flow path member 90 is partially accommodated in the second casing 67, the back wall 90b of the recess 90a forms a part of the back wall 6b of the slot 6a (a part of the back wall 67b of the slot 67a). ing. Further, when the flow path member 90 is partially accommodated in the second casing 67, the back wall 90b of the recess 90a and the surface (back surface) opposite to the recess 90a of the flow path member 90 are the second casing. 67 is exposed without being covered. Thus, the compressed air introduction port 73 and the 2nd blower outlet 72 are formed in the part which the flow-path member 90 exposed.

  In the following description, “the upstream side in the air flow direction (upstream side in the fluid flow direction)” and “the downstream side in the air flow direction (downstream side in the fluid flow direction)” are flow paths in the direction in which the compressed air (fluid) flows. This means the upstream side and the downstream side.

  The introduction path 93 is a linear flow path having a compressed air introduction port 73 formed at one end thereof. The introduction path 93 is formed so as to extend perpendicularly from the back surface side of the yarn monitoring device 6 to the back surface (specifically, the back surface of the flow path member 90). The other end of the introduction path 93 is connected to the intermediate path 94.

  The 1st flow path 91 is a flow path in which the 1st blower outlet 71 is formed in the end. The first flow path 91 is bent a plurality of times along the way. The first flow path 91 is formed across a plurality of members (specifically, the flow path member 90, the first casing 66, and the second casing 67). Specifically, in the first flow path 91, a flow path from an end portion connected to the intermediate path 94 to a midway portion is formed in the flow path member 90. Further, as shown in FIG. 4, a flow path from the midway portion to the first blower outlet 71 is formed in the second casing 67. Further, in the vicinity of the first air outlet 71, a part of the flow path on the downstream side in the yarn traveling direction is formed in the first casing 66, and the remaining part (a part on the upstream side in the yarn traveling direction) is the first. Two casings 67 are formed. The first air outlet 71 is formed so as to straddle the first casing 66 and the second casing 67. The part formed in the flow path member 90 in the first flow path 91 is from the surface (bottom surface) on one side in the thickness direction of the flow path member 90 to the bottom surface, as shown in FIGS. It is formed to extend vertically. As described above, the first air outlet 71 is formed at one end of the first flow path 91, and the other end of the first flow path 91 is connected to the intermediate path 94.

  The 2nd flow path 92 is a linear flow path in which the 2nd blower outlet 72 is formed in the end. The second flow path 92 of the present embodiment is formed so as to extend perpendicularly to the back wall 90b from the back wall 67b of the slot 67a (strictly, the back wall 90b of the recess 90a of the flow path member 90). . The other end of the second flow path 92 is connected to the intermediate path 94. In the present embodiment, the second flow path 92 is entirely formed in the flow path member 90.

  The intermediate path 94 is a linear flow path, and the end of the introduction path 93, the end of the second flow path 92, and the end of the first flow path 91 are directed in this order toward the downstream side in the air flow direction. Are connected at different positions. The intermediate path 94 extends in a direction different from any of the direction in which the introduction path 93 extends, the direction in which the second flow path 92 extends, and the direction in which the first flow path 91 extends. In the present embodiment, the intermediate path 94 extends in a direction perpendicular to any of the direction in which the introduction path 93 extends, the direction in which the second flow path 92 extends, and the direction in which the first flow path 91 extends. As described above, in the intermediate path 94, the end where the second flow path 92 is connected to the intermediate path 94 is located on the downstream side in the air flow direction from the end where the introduction path 93 is connected to the intermediate path 94. In other words, the position where the second flow path 92 is connected to the intermediate path 94 is offset to the downstream side in the air flow direction with respect to the position where the introduction path 93 is connected to the intermediate path 94.

  The compressed air introduced into the yarn monitoring device 6 (in the second casing 67) from the compressed air introduction port 73 by the distribution flow channel 100 configured as described above is supplied to the first flow channel 91, the second flow channel 92, and the like. And are blown out from the respective outlets (the first outlet 71 and the second outlet 72).

  Here, the position where the end of the second flow path 92 is connected to the intermediate path 94 is offset to the downstream side in the air flow direction with respect to the position where the end of the introduction path 93 is connected to the intermediate path 94. Yes. Therefore, it is possible to prevent the compressed air introduced from the introduction passage 93 from flowing significantly to the second flow passage 92. Further, the diameter of the circular opening (the diameter of the end of the second flow path 92) D2 where the second flow path 92 is connected to the intermediate path 94 is the diameter of the circular opening where the introduction path 93 is connected to the intermediate path 94 ( The diameter of the end of the introduction path 93 is smaller than D3 (D2 <D3). Therefore, the compressed air in a state where the momentum is weakened is blown from the second outlet 72 to the cutting edge 81 a of the cutting device 16. In this way, by using a small amount of compressed air, the cutting device 16 can be pinpointed and cleaned to a place where fiber scraps are easily caught, and wasteful consumption of compressed air can be suppressed.

  As shown in FIGS. 9 and 10, the diameter of the circular opening (the diameter of the end of the first flow path 91) D <b> 1 where the first flow path 91 is connected to the intermediate path 94 is the second flow path 92. It is configured to be larger than the diameter of the circular opening connected to the intermediate path 94 (the diameter of the end of the second flow path 92) D2 (D1> D2). Thereby, the flow rate of the compressed air flowing through the second flow path 92 can be made smaller than the flow rate of the compressed air flowing through the first flow path 91. As a result, in the present embodiment, a small amount of compressed air is supplied to the second outlet 72 for the cutting device 16 that can be sufficiently cleaned by simply blowing the compressed air to the blade edge 81a at the pinpoint, while the upstream yarn About the guide 64 and the detection part 70, a comparatively large amount of compressed air is supplied to the 1st blower outlet 71 so that compressed air can be sprayed vigorously over a wide range (that is, over the wide width of the slots 6a). Can do. Thereby, it can clean efficiently by adjusting the flow volume of the compressed air supplied according to each cleaning object.

  In the distribution flow channel 100 having such a configuration, the compressed air introduced from the compressed air introduction port 73 is supplied to the first air outlet 71 by appropriately setting the diameter, shape, cross-sectional area, and the like of the flow channel and the opening. Can be appropriately distributed between the amount blown out from the air outlet and the amount blown out from the second air outlet 72. Thereby, it can clean by spraying compressed air appropriately according to cleaning object.

  As described above, the yarn monitoring device 6 of the present embodiment includes the detection unit 70 and the upstream yarn guide 64 as an upstream yarn path regulating member. The detection unit 70 detects the state of the yarn 21 in the yarn traveling space 68 where the yarn 21 travels. The upstream yarn guide 64 is disposed upstream of the detection unit 70 in the yarn traveling direction, and regulates the yarn path that is the traveling position of the yarn 21 in the yarn traveling space 68. The yarn monitoring device 6 is formed with a first air outlet 71 for blowing compressed air as a fluid to a region including at least the upstream yarn guide 64. The first air outlet 71 includes a portion that is disposed downstream of the upstream yarn guide 64 in the yarn traveling direction.

  As described above, the first air outlet 71 includes a portion disposed downstream of the upstream yarn guide 64 in the yarn traveling direction, so that a flow of compressed air is formed near the downstream side of the upstream yarn guide 64 in the yarn traveling direction. Is done. Thereby, the compressed air blown out from the first outlet 71 smoothly reaches a portion in the vicinity of the upstream yarn guide 64. Therefore, the fiber waste in the vicinity of the upstream yarn guide 64 can be efficiently blown away by the compressed air blown from the first blower outlet 71. As a result, it is possible to prevent the fiber waste of the upstream yarn guide 64 from being taken along by the yarn 21 and entering the detection region in the yarn traveling space 68 and staying in the detection region.

  In the yarn monitoring device 6 of the present embodiment, the downstream side in the traveling direction of the yarn 21 coincides with the upper side in the vertical direction.

  As a result, even if fiber waste accumulates on the upper side of the upstream yarn guide 64 due to its own weight (that is, downstream in the yarn traveling direction), the fiber waste is blown off by the compressed air blown from the first air outlet 71 and removed. can do. Further, it is possible to prevent the fiber waste accumulated on the upstream yarn guide 64 from entering the detection region with the yarn and staying in the detection region.

  Further, in the yarn monitoring device 6 of the present embodiment, the first air outlet 71 is formed in an elongated shape in the yarn traveling direction.

  Thereby, since compressed air can be strongly blown out from the 1st blower outlet 71 over the comparatively wide range along a yarn running direction, the fiber waste near the upstream yarn guide 64 can be blown off favorably.

  Further, the yarn monitoring device 6 of the present embodiment further includes a downstream yarn guide 65. The downstream yarn guide 65 is disposed downstream of the detection unit 70 in the yarn traveling direction, and regulates the traveling position (yarn path) of the yarn 21 in the yarn traveling space 68. As shown in FIG. 7, a part of the compressed air blown out from the first air outlet 71 (a part of the first air outlet direction) approaches the downstream side in the yarn traveling direction as the distance from the first air outlet 71 increases. In this way, it is inclined with respect to the yarn path defined by the upstream yarn guide 64 and the downstream yarn guide 65.

  As a result, the fiber waste is blown away from the vicinity of the upstream yarn guide 64 to the downstream side of the yarn path, so that the fiber waste once blown back is returned to the yarn traveling space 68 by the traveling yarn 21. Can be prevented.

  In the yarn monitoring device 6, a part of the compressed air blown out from the first blower outlet 71 is formed in a direction toward the detection unit 70.

  Thereby, not only the vicinity of the upstream yarn guide 64 but also the detection unit 70 (the light incident surface and the light emitting surface thereof) can be cleaned simultaneously by the compressed air blown from the first air outlet 71.

  Further, the yarn monitoring device 6 of the present embodiment has the following configuration. That is, the yarn traveling space 68 is formed by being surrounded on three sides by a pair of side walls 6c, 6d and a back wall 6b. The compressed air blown out from the first blower outlet 71 toward the detection unit 70 is such that the blown compressed air travels from the open side of the yarn running space 68 (the space formed by the slot 6a). It is formed so as to enter the space 68 and be sprayed to one side wall 6d of the pair of side walls 6c, 6d.

  Thereby, the compressed air blown out from the first blower outlet 71 toward the detection unit 70 enters the yarn traveling space 68 from the opened side and enters one side wall 6d of the pair of side walls 6c, 6d. As a result, a flow of compressed air that swirls in the yarn traveling space 68 is generated, and the compressed air is also blown to the back wall 6b and the other side wall 6c. Therefore, the traveling space can be cleaned over a wide area.

  In the yarn monitoring device 6 of the present embodiment, the detection unit 70 includes a light emitting element 37 as a light projecting unit that emits light toward the yarn 21, and a light receiving element 38 that receives light emitted from the light emitting element 37. The 1st sensor part 51 which has these is provided. When viewed in a direction along the yarn traveling direction, the compressed air blown out from the first blower outlet 71 toward the detection unit 70 is a surface of the side walls 6c and 6d from which light from the light emitting element 37 is emitted. It is formed so as to be directed to a position avoiding both the above-described (exiting surface) and the surface (incident surface) on which light toward the light receiving element 38 enters.

  That is, if the light emission surface from the light emitting element 37 or the light incident surface toward the light receiving element 38 becomes dirty, the detection result of the detection unit 70 (first sensor unit 51) may be affected. In this regard, in the present configuration, the compressed air is blown out toward the position of the side walls 6c and 6d that avoids both the light emission surface from the light emitting element 37 and the light incident surface toward the light receiving element 38. Even if the compressed air is contaminated, the detection performance of the detection unit 70 (first sensor unit 51) can be maintained high.

  In the yarn monitoring device 6 of the present embodiment, the detection unit 70 further includes a second sensor unit 52 that is disposed on the downstream side in the yarn traveling direction with respect to the first sensor unit 51. The end of the first air outlet 71 on the downstream side in the yarn traveling direction is located upstream of the second sensor unit 52 in the yarn traveling direction.

  As a result, the compressed air blown out from the first air outlet 71 does not flow excessively toward the second sensor portion 52, so that the compressed air blown out from the first air outlet 71 is transferred to the region including the upstream yarn guide 64. It can be sprayed intensively, and this area can be cleaned intensively and efficiently.

  In addition, the yarn monitoring device 6 of the present embodiment further includes a blade 81 of the cutting device 16 and a second air outlet 72. The blade 81 of the cutting device 16 is arranged upstream of the upstream yarn guide 64 in the yarn traveling direction, and cuts the yarn 21 traveling in the yarn traveling space 68. The second outlet 72 is provided for blowing compressed air toward the blade 81 of the cutting device 16. The second air outlet 72 is formed upstream of the upstream yarn guide 64 in the yarn traveling direction.

  Thereby, since the blade 81 of the cutting device 16 is cleaned not by the first blowout port 71 but by the compressed air blown out from the second blowout port 72, the first blower port 71 is detected by the first sensor unit 51. It can be set as the exclusive blower outlet for the removal of the fiber waste related to performance. Therefore, the 1st blower outlet 71 is arrange | positioned in the position suitable for blowing away the fiber waste near the upstream yarn guide 64, or the shape of the 1st blower outlet 71 is blown away near the upstream yarn guide 64. It can be made into a shape suitable for. Therefore, each place can be appropriately cleaned by the compressed air blown out from the individual outlets.

  In the yarn monitoring device 6 of the present embodiment, the yarn traveling space 68 is formed by being surrounded on three sides by the pair of side walls 6c and 6d and the back wall 6b of the slot 6a. The blowing direction of the compressed air blown from the second blower outlet 72 is formed to be a direction toward the opened side of the yarn traveling space 68.

  Thereby, the fiber waste in the yarn traveling space 68 can be blown out of the yarn traveling space 68 by blowing the fluid from the second air outlet 72.

  In addition, the yarn monitoring device 6 according to the present embodiment includes a downstream yarn guide 65. The downstream yarn guide 65 is disposed downstream of the detection unit 70 in the yarn traveling direction, and regulates the position (yarn path) where the yarn 21 travels in the yarn traveling space 68. The blade 81 of the cutting device 16 is disposed at a position shifted from the yarn path defined by the upstream yarn guide 64 and the downstream yarn guide 65 when viewed in a direction perpendicular to the back wall 6b, and the second blower The compressed air blown out from the outlet 72 is formed so as to be directed toward the cutting edge 81a of the blade 81 of the cutting device 16 in a standby state without passing through the yarn path.

  Thereby, the compressed air blown out from the second outlet 72 can be appropriately blown and cleaned against the blade 81 of the cutting device 16 in a standby state in which the yarn 21 is not cut. Furthermore, there is a merit that even if the fluid blown from the second outlet 72 during the yarn traveling is blown to the blade 81 of the cutting device 16, the yarn 21 is not shaken.

  The yarn monitoring device 6 according to the present embodiment further includes a compressed air introduction port 73 and a distribution channel 100. Compressed air is introduced into the compressed air introduction port 73. The distribution channel 100 guides the compressed air introduced from the compressed air introduction port 73 to the first air outlet 71 and the second air outlet 72. The distribution flow path 100 includes an introduction path 93, a first flow path 91, a second flow path 92, and an intermediate path 94. A compressed air introduction port 73 is formed at one end of the introduction path 93. A first air outlet 71 is formed at one end of the first flow path 91. A second air outlet 72 is formed at one end of the second flow path 92. The other end of the introduction path 93, the other end of the first flow path 91, and the other end of the second flow path 92 are connected to the intermediate path 94 at different positions. The intermediate path 94 extends in a direction different from any of the direction in which the introduction path 93 extends, the direction in which the first flow path 91 extends, and the direction in which the second flow path 92 extends. In this intermediate path 94, the end (the other end) where the second flow path 92 is connected to the intermediate path 94 is downstream of the end (the other end) where the introduction path 93 is connected to the intermediate path 94 in the air flow direction. Located on the side.

  Thereby, the 1st blower outlet 71 and the 2nd blower outlet 72, the diameter of each flow path, a cross-sectional area, etc. are set suitably, and the compressed air introduce | transduced from the compressed air inlet 73 is changed into the 1st blower outlet 71. Can be appropriately distributed between the amount blown out from the air outlet and the amount blown out from the second air outlet 72. Accordingly, the flow rate of the compressed air blown from the first blower outlet 71 toward the upstream yarn guide 64 and the detection unit 70 (first sensor part 51), and from the second blower outlet 72 toward the blade 81 of the cutting device 16 is achieved. The flow rate of the compressed air to be sprayed can be adjusted so as to be appropriate, and any place can be suitably cleaned.

  In the yarn monitoring device 6 of the present embodiment, the diameter D1 of the opening (the other end) where the first flow path 91 is connected to the intermediate path 94 is the opening (the above-mentioned) where the second flow path 92 is connected to the intermediate path 94. It is larger than the diameter D2 of the other end (D1> D2). In other words, the opening of the first flow path 91 is larger than the opening of the second flow path 92.

  As a result, the flow rate of the compressed air flowing through the first flow path 91 can be made larger than the flow rate of the compressed air flowing through the second flow path 92, and as a result, sprayed toward the region including the upstream yarn guide 64. The amount of compressed air can be made larger than the amount of compressed air blown toward the blade 81 of the cutting device 16. As described above, it is desirable to supply a large amount of compressed air to the first outlet 71 and blow the compressed air at a pinpoint for the region including the upstream yarn guide 64 where it is desired to blow the compressed air over a wide region. By supplying a small amount of compressed air to the second outlet 72 for the blade 81 of the cutting device 16, the object to be cleaned can be efficiently cleaned without wasting the compressed air.

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

  In the above embodiment, the first blowing direction is a direction in which the first blowing direction is obliquely blown from the opened side of the slots 67a and 69a toward the one side wall 69d, but is not limited thereto. Instead of this, the first blowing direction may be a direction in which the first blowing direction is obliquely blown from the opened side of the slots 67a and 69a toward the other side wall 69c.

  In the above embodiment, compressed air is blown out from the first air outlet 71 and the second air outlet 72, but the present invention is not limited to this, and gas (fluid) other than air may be blown out. Further, for example, a gas containing a small amount of liquid may be blown out.

  The shapes and sizes of the first air outlet 71 and the second air outlet 72 are not limited to the above, and can be changed as appropriate. For example, the shape of the first outlet 71 is preferably a shape that allows at least a part of the blown fluid to smoothly reach the vicinity of the upstream yarn guide 64, for example, a parallelogram, a rectangle, an ellipse, It can also be a trapezoidal shape. Moreover, the 1st blower outlet 71 can also be considered as the three-dimensional blower outlet integrated with the guide surface 71a, the ceiling surface 71b, and the floor surface 71c.

  Further, the openings of the portions where the introduction path 93, the first flow path 91, and the second flow path 92 are respectively connected to the intermediate path 94 are replaced with circular shapes as in the above-described embodiment, and other shapes ( For example, it may be configured in a polygonal shape.

  In the above embodiment, the first sensor unit 51 is configured as an optical sensor that includes one light emitting element 37 on one side wall 6d and one light receiving element 38 on the other side wall 6c. However, the present invention is not limited to this, and one or more light emitting elements and one or more light receiving elements may be provided. That is, for example, one side wall 6d is provided with one light emitting element and one light receiving element, and the other side wall 6c is provided with a light receiving element corresponding to the light emitting element and a light emitting element corresponding to the light receiving element. Also good. Note that the number of light receiving elements corresponding to one light emitting element is not limited to one, and a plurality of light receiving elements may be provided for one light emitting element.

  In the above embodiment, the second sensor unit 52 is configured as an optical sensor similar to the first sensor unit 51. However, the present invention is not necessarily limited to this, and the state of the yarn 21 that travels between the electrodes by configuring the second sensor unit as a capacitive sensor and measuring the capacitance between the pair of electrodes. May be detected. Further, the first sensor unit may be configured as a capacitance sensor, and the second sensor unit may be configured as an optical sensor. You may comprise both a 1st sensor part and a 2nd sensor part as an electrostatic capacitance type sensor.

  In the above embodiment, the yarn monitoring device 6 detects the thickness of the yarn by monitoring the intensity of light blocked by the yarn. However, the present invention is not limited to this. For example, the reflected light from the yarn 21 The presence or absence of foreign matter contained in the yarn 21 may be detected by monitoring the strength of the thread 21.

  In the above embodiment, the “first sensor unit 51”, the “first air outlet 71”, and the like have been described, but this excludes the case where only one detection unit or air outlet is provided. Not intended. In other words, the second sensor unit 52 may not be provided as the detection unit, and only the first sensor unit 51 may be provided. Alternatively, the second air outlet 72 may not be provided as the air outlet, and only the first air outlet 71 may be provided. There may be.

  In the above-described embodiment, the yarn 21 travels from below to above. However, instead of this, the yarn 21 may be configured to travel from above to below. In this case, the yarn monitoring device 6 shown in FIG. 4 and the like can be used upside down.

  The yarn monitoring device described in the above embodiment is not limited to an automatic winder but can be used by being attached to other types of textile machines such as a spinning machine.

  In the above embodiment, the compressed air flowing from the intermediate passage 94 to the second flow passage 92 flows along a route perpendicular to the intermediate passage 94 in the flow passage member 90, but downstream of the flow passage member 90. In FIG. 4, the flow is along a path inclined in an oblique direction with respect to the intermediate path 94. However, the present invention is not limited to this, and the compressed air may flow along a path perpendicular to the intermediate path 94 even downstream of the flow path member 90. An example is shown in FIG.

6 Yarn Monitoring Device 6a Slot 6b Back Wall 6c Side Wall 6d Side Wall 37 Light Emitting Element (Light Projecting Unit)
38 Light receiving element (light receiving part)
51 1st sensor part 52 2nd sensor part 64 Upstream thread guide (upstream thread path regulating member)
65 Downstream thread guide (downstream thread path regulating member)
70 Detection part 71 1st blower outlet 72 2nd blower outlet 81 Blade (cutting part)

Claims (13)

A detection unit for detecting the state of the yarn in the yarn traveling space in which the yarn travels;
An upstream yarn path regulating member that is arranged upstream of the detection unit in the yarn running direction and regulates a yarn path that is a yarn running position in the yarn running space;
With
A first air outlet is formed for spraying fluid on at least the region including the upstream yarn path regulating member;
The first air outlet includes a portion disposed downstream of the upstream yarn path regulating member in the yarn traveling direction. The yarn monitoring device according to claim 1,
A yarn monitoring device characterized in that the downstream side in the yarn traveling direction coincides with the upper side in the vertical direction. The yarn monitoring device according to claim 1 or 2,
The first air outlet is formed in an elongated shape in the yarn traveling direction. The yarn monitoring device according to any one of claims 1 to 3,
A downstream yarn path regulating member disposed downstream of the detection unit in the yarn traveling direction and regulating the yarn path;
The upstream-side yarn path regulating member and the downstream-side yarn path regulation are arranged such that a part of the blowing direction of the fluid blown out from the first blow-out port approaches the downstream side in the yarn traveling direction as the distance from the first blow-out port increases. A yarn monitoring device which is inclined with respect to a yarn path defined by a member. The yarn monitoring device according to any one of claims 1 to 4, wherein
A yarn monitoring device, wherein a part of the blowing direction of the fluid blown out from the first blowout port is formed to be a direction toward the detection unit. The yarn monitoring device according to claim 5,
The yarn traveling space is formed by three sides surrounded by a pair of side walls and a back wall,
The blowing direction of the fluid blown out from the first blowout port toward the detection unit is such that the blown fluid enters the yarn running space from the open side of the yarn running space, and the pair of side walls A yarn monitoring device, wherein the yarn monitoring device is formed so as to be sprayed on one of the side walls. The yarn monitoring device according to claim 6,
The detection unit includes a first sensor unit having a light projecting unit that emits light toward the yarn and a light receiving unit that receives the light emitted from the light projecting unit,
When viewed in a direction along the yarn traveling direction, the direction of the fluid blown out from the first blower outlet toward the detection unit is the light emission surface of the light projecting unit and the light receiving unit of the side wall. A yarn monitoring device, characterized in that it is formed in a direction toward any position where any of the light incident surfaces is avoided. The yarn monitoring device according to claim 7,
The detection unit further includes a second sensor unit disposed on the downstream side in the yarn traveling direction from the first sensor unit,
An end of the first air outlet on the downstream side in the yarn traveling direction is located upstream of the second sensor unit in the yarn traveling direction. A yarn monitoring device according to any one of claims 1 to 8,
A cutting portion that is arranged upstream of the upstream yarn path regulating member in the yarn traveling direction, and that cuts the yarn traveling in the yarn traveling space;
A second outlet for spraying fluid toward the cutting portion;
Further comprising
The yarn monitoring device, wherein the second air outlet is formed on the upstream side in the yarn traveling direction with respect to the upstream yarn path regulating member. The yarn monitoring device according to claim 9, wherein
The yarn traveling space is formed by three sides surrounded by a pair of side walls and a back wall,
The second air outlet is formed in the back wall,
The yarn monitoring device according to claim 1, wherein a direction of blowing the fluid blown from the second blow-out port is formed to be a direction toward the open side of the yarn traveling space. The yarn monitoring device according to claim 10,
A downstream yarn path regulating member that is disposed downstream of the detection unit in the yarn traveling direction and regulates the yarn path;
In the standby state in which the yarn is not cut, the cutting portion, when viewed in a direction perpendicular to the back wall, from the yarn path defined by the upstream yarn path regulating member and the downstream yarn path regulating member Placed in a misaligned position,
The yarn monitoring device according to claim 1, wherein a blowing direction of the fluid blown from the second blow-out port is formed to be a direction toward the cutting portion without passing through a yarn path. The yarn monitoring device according to any one of claims 9 to 11,
A fluid inlet through which fluid is introduced;
A fluid flow path for guiding the fluid introduced from the fluid inlet to the first outlet and the second outlet;
Further comprising
The fluid flow path is
An introduction path formed at one end of the fluid introduction port;
A first flow path formed at one end of the first air outlet;
A second flow path formed at one end of the second air outlet;
The other end of the introduction path, the other end of the first flow path, and the other end of the second flow path are connected at different positions, respectively, a direction in which the introduction path extends, a direction in which the first flow path extends, and An intermediate path extending in a direction different from any of the extending directions of the second flow path;
Have
In the intermediate path, the other end of the second flow path is located on the downstream side in the fluid flow direction with respect to the other end of the introduction path. The yarn monitoring device according to claim 12,
The yarn monitoring device, wherein an opening connecting the first flow path to the intermediate path is larger than an opening connecting the second flow path to the intermediate path.

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