EP2910507A1 - Garnsammelvorrichtung, Garnwickeleinheit damit und Garnwickelmaschine damit - Google Patents

Garnsammelvorrichtung, Garnwickeleinheit damit und Garnwickelmaschine damit Download PDF

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Publication number
EP2910507A1
EP2910507A1 EP15153002.9A EP15153002A EP2910507A1 EP 2910507 A1 EP2910507 A1 EP 2910507A1 EP 15153002 A EP15153002 A EP 15153002A EP 2910507 A1 EP2910507 A1 EP 2910507A1
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EP
European Patent Office
Prior art keywords
yarn
contacting surface
removal
spun
flyer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15153002.9A
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English (en)
French (fr)
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EP2910507B1 (de
Inventor
Kenichi Ueda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Machinery Ltd
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Murata Machinery Ltd
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Filing date
Publication date
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Publication of EP2910507A1 publication Critical patent/EP2910507A1/de
Application granted granted Critical
Publication of EP2910507B1 publication Critical patent/EP2910507B1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
    • B65H51/22—Reels or cages, e.g. cylindrical, with storing and forwarding surfaces provided by rollers or bars
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing

Definitions

  • the present invention relates to a shape of a yarn removal member adapted to remove a yarn from a yarn hooking member in a yarn accumulating device adapted to accumulate the yarn by winding the yarn around a yarn accumulating roller by the rotating yarn hooking member.
  • a yarn winding machine such as a fine spinning machine includes a yarn accumulating device adapted to temporarily accumulate a yarn to be wound.
  • Patent Document 1 Japanese Patent Application Laid-open No. 2013-67891 (Patent Document 1) describes such a yarn accumulating device.
  • the yarn accumulating device described in Patent Document 1 includes a yarn accumulating roller adapted to accumulate a yarn by winding the yarn around a peripheral surface thereof.
  • the yarn accumulating device includes a yarn hooking member for winding the yarn around the yarn accumulating roller.
  • the yarn hooking member is formed into a shape on which the yarn can be hooked. Since the yarn hooking member with the yarn hooked thereon is integrally rotated with the yarn accumulating roller, the yarn is wound around the yarn accumulating roller.
  • a yarn removal lever adapted to remove the yarn from the yarn hooking member is arranged in proximity to the yarn accumulating device described in Patent Document 1.
  • the yarn removal lever in Patent Document 1 is arranged to be capable of vertically swinging between an elevated position and a lowered position with a swing shaft as a center.
  • the yarn removal lever is arranged to not make contact with a yarn path when located at the lowered position.
  • An object of the present invention is to provide a configuration of a yarn removal lever that enables the yarn to be reliably removed from the yarn hooking member.
  • a yarn accumulating device includes a yarn accumulating roller, a yarn hooking member, and a yarn removal member.
  • the yarn accumulating roller is arranged to rotate under a state in which a yarn is wound around a peripheral surface thereof.
  • the yarn hooking member is arranged capable of integrally rotating with the yarn accumulating roller and adapted to guide the yarn.
  • the yarn removal member has a contacting surface arranged movable between a standby position and a yarn removal position and adapted to be capable of making contact with the yarn, and is adapted to remove the yarn from the yarn hooking member by moving the contacting surface to the yarn removal position.
  • the contacting surface includes a first portion and a second portion.
  • the first portion In a direction in which the contacting surface moves from the standby position towards the yarn removal position, the first portion is located upstream of the second portion. Under a state in which the contacting surface has been moved to the yarn removal position, at least a portion of the first portion is located downstream of the yarn accumulating roller in a running direction of the yarn.
  • the first portion and the second portion located at different positions in the direction in which the contacting surface moves are arranged at the contacting surface of the yarn removal member, a height to which the yarn is pushed upward can be differed in accordance with a position where the yarn makes contact with the contacting surface. Accordingly, reliable yarn removal becomes possible.
  • the first portion By arranging the first portion to be located downstream of the yarn accumulating roller in the running direction of the yarn, the yarn pushed upward by the first portion can be prevented from being wound around the yarn accumulating roller.
  • the first portion and the second portion are preferably smoothly continuous at the contacting surface of the yarn removal member.
  • the yarn that has made contact with the first portion can be smoothly moved to the second portion.
  • behavior of the yarn can be prevented from becoming unstable.
  • the first portion is arranged with respect to a yarn non-removal region where the yarn cannot be removed from the yarn hooking member, and the second portion is arranged with respect to a yarn removal region where the yarn can be removed from the yarn hooking member.
  • a position to which the yarn is pushed upward can be set low in a region where the yarn cannot be removed. Accordingly, the yarn can be prevented from being unnecessarily moved a long distance and thus becoming unstable, and a defect such as an entanglement of the yarn can be prevented.
  • the second portion With respect to the yarn removal region, the position to which the yarn is pushed upward can be set high in a region where the yarn can be removed. Accordingly, the yarn can be reliably removed from the yarn hooking member.
  • the contacting surface is arranged to not make contact with the yarn when located at the standby position.
  • the contacting surface is adapted to make contact with the yarn by being moved from the standby position to the yarn removal position.
  • the yarn removal member does not influence running of the yarn.
  • the contacting surface can push the yarn upward by being moved from the standby position to the yarn removal position.
  • a distance between an upstream end of the first portion and a downstream end of the second portion is preferably at least 10 mm and at most 20 mm.
  • the distance between the first portion and the second portion in the moving direction of the contacting surface is thus preferably within the above-described range.
  • a yarn winding unit includes the above-described yarn accumulating device, a draft device adapted to supply a fiber bundle, a spinning device adapted to apply twists to the fiber bundle and to produce a spun yarn, and a winding device adapted to wind the spun yarn.
  • the yarn accumulating device is adapted to temporarily accumulate the spun yarn between the spinning device and the winding device.
  • the yarn accumulating device functions as a kind of a buffer, and a defect (such as a yarn slackening) in a case in which a spinning speed by the spinning device and a winding speed by the winding device do not correspond to each other for some reason can be resolved.
  • a defect such as a yarn slackening
  • the spun yarn can be stably wound.
  • a yarn winding machine includes a plurality of the yarn winding units and a service carrier arranged to travel among the plurality of the yarn winding units.
  • the service carrier includes a drive source adapted to move the contacting surface between the standby position and the yarn removal position.
  • the yarn winding machine can be configured at low cost.
  • a fine spinning machine 1 serving as the yarn winding machine illustrated in FIG. 1 includes a large number of spinning units (yarn winding units) 2 arranged side by side and a yarn joining carrier (a service carrier) 3.
  • FIG. 4A and FIG. 4B , FIG. 5A and FIG. 5B , FIG. 6A and FIG. 6B , FIGS. 7A-7D , and FIG. 11A and FIG. 11B may be respectively referred to as simply FIG. 4 , FIG. 5 , FIG. 6 , FIG. 7 , and FIG. 11 .
  • Each of the spinning units 2 includes a draft device 7, a spinning device 9, a yarn accumulating device 12, and a winding device 13 arranged in this order from upstream towards downstream.
  • a draft device 7, a spinning device 9, a yarn accumulating device 12, and a winding device 13 arranged in this order from upstream towards downstream.
  • upstream and downstream in a running direction of a fiber bundle and a yarn at the time of spinning are respectively meant.
  • Each spinning unit 2 is adapted to spin a fiber bundle 8, which is fed from the draft device 7, by the spinning device 9 to produce a spun yarn 10, and to wind the spun yarn 10 around a bobbin 48 by the winding device 13 to form a package 45.
  • the draft device 7 is adapted to produce the fiber bundle 8 by stretching a sliver 15. As illustrated in FIG. 2 , the draft device 7 includes four pairs of rollers, which are a pair of back rollers 16, a pair of third rollers 17, a pair of middle rollers 19, and a pair of front rollers 20 arranged in this order from upstream. An apron belt 18 is provided to each roller of the pair of middle rollers 19.
  • the spinning device 9 is arranged immediately downstream of the front rollers 20.
  • the fiber bundle 8 from the draft device 7 is fed to the spinning device 9.
  • the spinning device 9 is adapted to apply twists to the fiber bundle 8 fed from the draft device 7 to produce the spun yarn 10.
  • a pneumatic spinning device adapted to apply twists to the fiber bundle 8 by use of whirling airflow is used.
  • the winding device 13 is arranged downstream of the spinning device 9.
  • the winding device 13 includes a cradle arm 71 supported swingably about a support shaft 73.
  • the cradle arm 71 can support in a rotatable manner, a bobbin 48 around which the spun yarn 10 is wound.
  • the winding device 13 includes a winding drum 72 and a traverse device 75.
  • the winding drum 72 is driven while being in contact with an outer peripheral surface of the bobbin 48 or an outer peripheral surface of the package 45.
  • the traverse device 75 includes a traverse guide 76 capable of engaging with the spun yarn 10.
  • the winding device 13 is adapted to drive the winding drum 72 by an electric motor (not illustrated) while reciprocating the traverse guide 76 by a drive device (not illustrated). Accordingly, the winding device 13 rotates the package 45 in contact with the winding drum 72 and winds the spun yarn 10 while traversing the spun yarn 10.
  • the yarn accumulating device 12 is arranged between the spinning device 9 and the winding device 13. As illustrated in FIG. 2 , the yarn accumulating device 12 includes a yarn accumulating roller 21 and an electric motor 25 adapted to rotationally drive the yarn accumulating roller 21.
  • the yarn accumulating roller 21 is a roller-shaped member adapted to be rotationally driven under a state in which the spun yarn 10 is wound around an outer peripheral surface thereof. Accordingly, the running spun yarn 10 can be temporarily accumulated by being wound around the outer peripheral surface of the yarn accumulating roller 21.
  • the yarn accumulating device 12 can function as a kind of a buffer by temporarily accumulating the spun yarn 10. Accordingly, a defect (for example, a slackening in the spun yarn 10) in a case in which a spinning speed in the spinning device 9 and a winding speed in the winding device 13 do not correspond to each other for some reason can be resolved.
  • a yarn clearer (a yarn quality measuring device) 52 is provided at a position between the spinning device 9 and the yarn accumulating device 12.
  • the spun yarn 10 spun from the spinning device 9 passes the yarn clearer 52 before being wound by the yarn accumulating device 12.
  • the yarn clearer 52 is adapted to monitor the running spun yarn 10 by an optical sensor (not illustrated), and to transmit a yarn defect detection signal to a unit controller (not illustrated) when detecting a yarn defect (a portion of the spun yarn 10 having an abnormality in thickness or the like) in the spun yarn 10.
  • the yarn clearer 52 may be provided with a capacitance sensor and may detect a presence and/or an absence of a foreign substance in the spun yarn 10 as a yarn defect.
  • the yarn joining carrier 3 is capable of travelling in a direction in which the spinning units 2 are arranged (a left-right direction in FIG. 1 ). As illustrated in FIGS. 1 and 2 , the yarn joining carrier 3 includes a splicer (a yarn joining device) 43 and a yarn catching members 44, 46. After a yarn cut or a yarn breakage has occurred in a spinning unit 2, the yarn joining carrier 3 travels to such a spinning unit 2. The yarn joining carrier 3 then sucks and catches yarn ends of the disconnected spun yarn 10 by the yarn catching members 44, 46 and guides the caught yarn ends to the splicer 43. The splicer 43 joins the guided yarn ends together (yarn joining operation). A state in which the yarn joining operation is being performed by the splicer 43 is illustrated in FIG. 10 .
  • the yarn accumulating device 12 includes a yarn hooking member 22, a downstream guide 26, a yarn removal lever (a yarn removal member) 28 in addition to the above-described yarn accumulating roller 21.
  • the yarn hooking member 22 is arranged at a downstream end 21a of the yarn accumulating roller 21. Since the spun yarn 10 runs while being wound around the yarn accumulating roller 21 in the yarn accumulating device 12, to be exact, the spun yarn 10 runs in a spiral manner.
  • a wording of a "running direction of the spun yarn 10" used in a description relating to the yarn accumulating device 12 refers to a direction in which an element parallel to an axial line of the yarn accumulating roller 21 faces, among the running direction of the spun yarn 10 running in a spiral manner. In FIG. 4B , for example, the "running direction of the spun yarn 10" is leftward (a direction indicated by a thick arrow).
  • the yarn hooking member 22 includes a flyer shaft 33 and a flyer 38.
  • the flyer shaft 33 is arranged to be capable of relatively rotating with respect to the yarn accumulating roller 21 about a rotational axis of the yarn accumulating roller 21 with a base-end portion as a center.
  • a predetermined resistance torque is applied between the flyer shaft 33 and the rotational axis of the yarn accumulating roller 21.
  • the yarn hooking member 22 is integrally rotated with the yarn accumulating roller 21.
  • the flyer 38 is fixed at a tip end of the flyer shaft 33.
  • the flyer 38 is formed into a shape by which the spun yarn 10 can be guided (hooked). More specifically, the flyer 38 is formed into a hook shape. As illustrated in FIG. 4A , when seen in a direction of the rotational axis of the yarn accumulating roller 21, a tip end 38a of the hook-shaped flyer 38 faces downstream in a rotational direction of the yarn accumulating roller 21.
  • the tip end 38a of the hook-shaped flyer 38 faces upstream in the running direction of the spun yarn 10.
  • the tip end 38a of the flyer 38 is located upstream of the downstream end 21a of the yarn accumulating roller 21.
  • the flyer 38 formed in this manner the running spun yarn 10 can be guided. Since the yarn hooking member 22 is integrally rotated with the yarn accumulating roller 21 under a state in which the spun yarn 10 has been guided to the flyer 38, the spun yarn 10 can be wound around the yarn accumulating roller 21.
  • the yarn hooking member 22 When the force that surpasses the resistance torque is applied to the yarn hooking member 22, the yarn hooking member 22 is relatively rotated with respect to the yarn accumulating roller 21. Accordingly, since the flyer 38 guiding the spun yarn 10 is relatively rotated with respect to the yarn accumulating roller 21, the spun yarn 10 can be drawn from the downstream end 21a of the yarn accumulating roller 21.
  • the downstream guide 26 is arranged slightly downstream of the yarn accumulating roller 21.
  • the downstream guide 26 is adapted to regulate a trajectory of the spun yarn 10 swung by the rotating flyer 38. Accordingly, the downstream guide 26 guides the spun yarn 10 while stabilizing a running path of the spun yarn 10 located downstream.
  • the yarn removal lever 28 is formed as a substantially L-shaped member having an elongated contacting surface 30 arranged in a substantially horizontal direction.
  • the yarn removal lever 28 of the present embodiment has a shape formed by cutting a metal plate member into a predetermined shape and appropriately folding the cut metal plate member.
  • the contacting surface 30 is formed of an end surface portion of the metal plate member, and the contacting surface 30 is constant in width.
  • a base portion of the yarn removal lever 28 is supported by a swing shaft 29.
  • the yarn removal lever 28 can move the contacting surface 30 between a standby position indicated by a solid line in FIG. 4 and a yarn removal position indicated by a chain line in FIG. 4 .
  • a direction in which the contacting surface 30 is moved from the standby position towards the yarn removal position is referred to as a "moving direction" of the contacting surface 30 (see FIG. 4 ).
  • the contacting surface 30 is arranged in proximity to the downstream end 21a of the yarn accumulating roller 21.
  • the yarn removal lever 28 is in a state of not being in contact with a yarn path of the spun yarn 10.
  • the spun yarn 10 can be removed from the flyer 38. A state in which the spun yarn 10 is removed from the flyer 38 will be described later.
  • the yarn removal lever 28 is driven by a drive source (an air pressure cylinder 49 in the present embodiment) provided to the yarn joining carrier 3.
  • a drive source an air pressure cylinder 49 in the present embodiment
  • the air pressure cylinder 49 pushes the yarn removal lever 28. Accordingly, the yarn removal lever 28 is swung, and the contacting surface 30 is moved from the standby position to the yarn removal position. Consequently, the spun yarn 10 can be removed from the flyer 38.
  • the yarn joining carrier 3 can appropriately control swing of the yarn removal lever 28 at the time of the yarn joining operation, the spun yarn 10 can be removed from the flyer 38 at any timing, and guiding of the spun yarn 10 by the flyer 38 can be started at any timing. Accordingly, the yarn joining carrier 3 can appropriately perform the yarn joining operation. Since control of the yarn removal lever 28 at the time of the yarn joining operation is publicly known as described in Patent Document 1, for example, detailed description is omitted.
  • the yarn joining carrier 3 includes the drive source (the air pressure cylinder 49) that swings the yarn removal lever 28.
  • a drive source that swings the yarn removal lever 28 is thus not provided to each spinning unit 2. Accordingly, the spinning unit 2 can be configured at a low cost, and cost for the overall fine spinning machine 1 can be reduced.
  • the contacting surface 30 makes contact with the spun yarn 10 located downstream of the flyer 38 (the spun yarn 10 between the flyer 38 and the downstream guide 26).
  • the spun yarn 10 can be moved towards the yarn removal position (an upper side in FIG. 4 ) by the contacting surface 30.
  • moving the spun yarn 10 towards the yarn removal position may be simply described as "pushing the spun yarn 10 upward" (however, this wording is for convenience sake in the description, and there is no intention to limit a direction of moving the spun yarn 10 to an upper direction).
  • the tip end 38a of the flyer 38 is facing the yarn removal position (an upper side in a case of FIG. 5A ) when seen in a direction of a rotational axis of the yarn hooking member 22.
  • the spun yarn 10 can be removed from the flyer 38 (a state in FIG. 5B ).
  • the tip end 38a of the flyer 38 is facing the yarn removal position (an upper side in a case of FIG. 5B )
  • the spun yarn 10 can be removed from the flyer 38.
  • the flyer 38 is not always located at a position in FIG. 5 .
  • the tip end 38a of the flyer 38 thus faces various directions.
  • the tip end 38a of the flyer 38 is facing the standby position (a lower side in a case of FIG. 6A ) when seen in the rotational axis direction of the yarn hooking member 22.
  • the spun yarn 10 cannot be removed from the flyer 38 (a state in FIG. 6B ).
  • FIG. 6B in spite of pushing the spun yarn 10 upward by the contacting surface 30, the spun yarn 10 is still hooked on the flyer 38.
  • a plane that passes the rotational axis of the yarn hooking member 22 and is parallel to the moving direction of the contacting surface 30 (upward directions in FIGS. 5 and 6 ) is assumed to be a boundary plane A.
  • a yarn removal region is a region where the tip end 38a of the flyer 38 faces the yarn removal position (downstream in the moving direction of the contacting surface 30, that is the upper sides in FIGS. 5 and 6 ).
  • the yarn non-removal region is a region where the tip end 38a of the flyer 38 faces the standby position (upstream in the moving direction of the contacting surface 30, that is the lower sides in FIGS. 5 and 6 ).
  • the spun yarn 10 can be removed from the flyer 38 by being pushed upward by the contacting surface 30 ( FIG. 5 ).
  • the spun yarn 10 is pulled towards the yarn removal region (a left side in FIG. 7 ) by the moving flyer 38. Consequently, as illustrated in FIGS. 7B, 7C, and 7D , the spun yarn 10 is moved from a first portion 31 towards a second portion 32 on the contacting surface 30.
  • the flyer 38 enters the yarn removal region while guiding the spun yarn 10 ( FIG. 7D ). Since the flyer 38 enters the yarn removal region, and thus the tip end 38a of the flyer 38 faces the yarn removal position (an upper side of FIG. 7 ), the spun yarn 10 is removed from the flyer 38 ( FIG. 7D ). As described above, even if the flyer 38 is located in the yarn non-removal region when the spun yarn 10 is pushed upward by the contacting surface 30, the spun yarn 10 can be eventually removed from the flyer 38.
  • a portion with respect to the yarn non-removal region is referred to as the first portion 31, and a portion with respect to the yarn removal region is referred to as the second portion 32.
  • the second portion 32 is located downstream of the first portion 31 in the moving direction of the contacting surface 30 (a position close to the yarn removal position and close to an upper side in FIG. 5 ). Conversely, the first portion 31 is located upstream of the second portion 32 in the moving direction of the contacting surface 30 (a position close to the standby position and close to a lower side in FIG. 5 ).
  • the second portion 32 can move the spun yarn 10 to a position higher than the first portion 31 can.
  • “High” and “low” indicate a height in a case in which downstream (the upper sides in FIGS. 5 and 6 ) in the moving direction (the upper directions in FIGS. 5 and 6 ) of the contacting surface 30 is an upper side when seen in the rotational axis direction of the yarn accumulating roller 21 (this wording is for convenience sake in the description and there is no intention to limit the moving direction of the contacting surface 30 to an upper direction).
  • a height to which the spun yarn 10 is pushed upward by the contacting surface 30 can be differed between when the flyer 38 is located in the yarn removal region and when the flyer 38 is located in the yarn non-removal region.
  • the spun yarn 10 When the flyer 38 is located in the yarn removal region, the spun yarn 10 can be pushed upward to a relatively high position by the second portion 32 (see FIG. 5B ). Accordingly, the spun yarn 10 can be reliably removed from the flyer 38.
  • the first portion 31 is located at a position lower than the second portion 32.
  • the spun yarn 10 is pushed upward merely to a relatively low position by the first portion 31 (see FIG. 6B ). Accordingly, the spun yarn 10 is not pushed upward to an unnecessarily high position. Consequently, the behavior of the spun yarn 10 can be prevented from becoming unstable, and the defect in which the spun yarn 10 is entangled with the yarn hooking member 22, for example, can be prevented from occurring.
  • the first portion 31 and the second portion 32 are smoothly continuous at the contacting surface 30 of the present embodiment.
  • the contacting surface 30 is formed in a curved-surface-shape (a curved shape) not to have an edge.
  • the spun yarn 10 is pushed upward by the first portion 31.
  • the spun yarn 10 is moved towards the second portion 32 (the left side in FIG. 7 ) on the contacting surface 30 by being pulled by the rotating flyer 38.
  • the spun yarn 10 can be smoothly moved towards the second portion 32 on the contacting surface 30.
  • behavior of the spun yarn 10 can be prevented from becoming unstable when moving on the contacting surface 30. Accordingly, when the flyer 38 enters the yarn removal region, the spun yarn 10 can be reliably removed from the flyer 38 ( FIG. 7D ).
  • the flyer 38 is formed into the hook shape to be capable of hooking the spun yarn 10 thereon, and the tip end 38a of the flyer 38 faces upstream in the running direction of the spun yarn 10 (see FIGS. 4A and 8 ).
  • the spun yarn 10 is required to be moved to a position upstream of the tip end 38a of the flyer 38 in the running direction of the spun yarn 10.
  • the spun yarn 10 that has been pushed upward by the second portion 32 can be moved to a position upstream of the tip end 38a of the flyer 38 in the running direction of the spun yarn 10. Consequently, the spun yarn 10 can be reliably removed from the flyer 38.
  • FIG. 11 A comparative example is illustrated in FIG. 11 to describe an effect thereof.
  • all region of the first portion 31 is located upstream of the downstream end 21a of the yarn accumulating roller 21 in the running direction of the spun yarn 10.
  • the spun yarn 10 under the state in which the contacting surface 30 has been moved to the yarn removal position, at least a portion of the first portion 31 is located downstream of the downstream end 21a of the yarn accumulating roller 21 in the running direction of the spun yarn 10.
  • the spun yarn 10 between the first portion 31 and the flyer 38 does not overlap with the yarn accumulating roller 21 in the radial direction. Accordingly, in the present embodiment, even if the yarn hooking member 22 is rotated under the state in which the spun yarn 10 is pushed upward by the first portion 31, the spun yarn 10 is not wound around the yarn accumulating roller 21 (see FIG. 7 ).
  • the spun yarn 10 pushed upward by the contacting surface 30 can be prevented from being wound around the yarn accumulating roller 21. Accordingly, since a case in which the spun yarn 10 cannot be removed from the flyer 38 does not occur, the spun yarn 10 can be reliably removed from the flyer 38.
  • the spun yarn 10 is immediately removed from the flyer 38 when the spun yarn 10 is pushed upward by the second portion 32, the spun yarn 10 is not wound around the yarn accumulating roller 21. Thus, there is no problem even if the second portion 32 is located upstream of the downstream end 21a of the yarn accumulating roller 21 in the running direction of the spun yarn 10. In the present embodiment, as illustrated in FIG. 8 , under the state in which the contacting surface 30 has been moved to the yarn removal position, all region of the second portion 32 is located upstream of the downstream end 21a of the yarn accumulating roller 21 in the running direction of the spun yarn 10.
  • the yarn removal lever 28 by devising a shape of the yarn removal lever 28, reliability of yarn removal can be improved. Conversely, even if processing accuracy of the yarn removal lever 28 or driving accuracy of a configuration (the air pressure cylinder 49) for driving the yarn removal lever 28 is low, the reliability of the yarn removal can be sufficiently secured. With the configuration of the present embodiment, accuracy of the yarn removal lever 28 and the air pressure cylinder 49 is not required as much as before. Accordingly, the yarn removal lever 28 and/or the air pressure cylinder 49 can be configured at low cost, and cost for the overall fine spinning machine 1 can be reduced.
  • a distance between an upstream end of the first portion 31 and a downstream end of the second portion 32 in the moving direction of the contacting surface 30 is referred to as a distance L.
  • the present invention has a technical concept to improve reliability of removal of the spun yarn 10 from the flyer 38 by providing the second portion 32 to be higher than the first portion 31, an effect of the invention is not sufficiently achieved if the distance L is excessively small.
  • the spun yarn 10 when the spun yarn 10 is pushed upward by the first portion 31, the spun yarn 10 is moved from the first portion 31 towards the second portion 32 on the contacting surface 30 in some cases. From a viewpoint of smoothly moving the spun yarn 10 from the first portion 31 towards the second portion 32, the distance L should not be excessively large.
  • the distance L is preferably not excessively small nor excessively large. Based on consideration of the inventor of the present invention, the distance L is preferably at least 10 mm and at most 20 mm, and is preferably 15 mm in particular. In the present embodiment, thus, the distance L is 15 mm.
  • the yarn accumulating device 12 of the present embodiment includes the yarn accumulating roller 21, the yarn hooking member 22, and the yarn removal lever 28.
  • the yarn accumulating roller 21 is rotated under the state in which the spun yarn 10 is wound around the peripheral surface thereof.
  • the yarn hooking member 22 is capable of integrally rotating with the yarn accumulating roller 21, and includes the flyer 38 capable of guiding the spun yarn 10.
  • the yarn removal lever 28 has the contacting surface 30 capable of making contact with the spun yarn 10.
  • the yarn removal lever 28 is capable of moving the contacting surface 30 between the standby position and the yarn removal position and removes the spun yarn 10 from the yarn hooking member 22 by moving the contacting surface 30 to the yarn removal position.
  • the contacting surface 30 includes the first portion 31 and the second portion 32.
  • the first portion 31 is located upstream of the second portion 32 in the moving direction of the contacting surface 30. Under the state in which the contacting surface 30 has been moved to the yarn removal position, at least a portion of the first portion 31 is located downstream of the downstream end 21a of the yarn accumulating roller 21 in the running direction of the spun yarn 10.
  • the first portion 31 and the second portion 32 are located at different positions in the moving direction of the contacting surface 30, and are arranged at the contacting surface 30 of the yarn removal lever 28. Height to which the spun yarn 10 is pushed upward thus can be differed according to a position where the spun yarn 10 makes contact with the contacting surface 30. Accordingly, reliable yarn removal becomes possible. Furthermore, as described above, by arranging at least a portion of the first portion 31 to be located downstream of the downstream end 21a of the yarn accumulating roller 21, the spun yarn 10 pushed upward by the first portion 31 can be prevented from being wound around the yarn accumulating roller 21 again.
  • the first portion 31 and the second portion 32 are smoothly continuous at the contacting surface 30 of the yarn removal lever 28.
  • the spun yarn 10 that has made contact with the first portion 31 can be smoothly moved to the second portion 32.
  • behavior of the spun yarn 10 can be prevented from becoming unstable.
  • the first portion 31 is arranged with respect to the yarn non-removal region where the spun yarn 10 cannot be removed from the yarn hooking member 22, and the second portion 32 is arranged with respect to the yarn removal region where the spun yarn 10 can be removed from the yarn hooking member 22.
  • the first portion 31 by arranging the first portion 31 with respect to the yarn non-removal region, a position to which the spun yarn 10 is pushed upward can be set low in the region where the spun yarn 10 cannot be removed. Accordingly, the spun yarn 10 can be prevented from being unnecessarily moved a large distance and thus becoming unstable, and a defect such as an entanglement of the spun yarn 10 can be prevented.
  • the second portion 32 By arranging the second portion 32 with respect to the yarn removal region, the position to which the spun yarn 10 is pushed upward can be set high in the region where the spun yarn 10 can be removed. Accordingly, the spun yarn 10 can be reliably removed from the yarn hooking member 22.
  • the contacting surface 30 is arranged to not make contact with the spun yarn 10 when located at the standby position.
  • the contacting surface 30 makes contact with the spun yarn 10 by being moved from the standby position to the yarn removal position.
  • the yarn removal lever 28 does not influence running of the spun yarn 10.
  • the spun yarn 10 can be pushed upward by the contacting surface 30.
  • the distance L between the upstream end of the first portion 31 and the downstream end of the second portion 32 in the moving direction of the contacting surface 30 is 15 mm.
  • the spinning unit 2 of the present embodiment includes the yarn accumulating device 12, the draft device 7 that supplies the fiber bundle 8, the spinning device 9 that applies twists to the fiber bundle 8 and to produce the spun yarn 10, and the winding device 13 that winds the spun yarn 10.
  • the yarn accumulating device 12 temporarily accumulates the spun yarn 10 between the spinning device 9 and the winding device 13.
  • the fine spinning machine 1 of the present embodiment includes a plurality of the spinning units 2 and the yarn joining carrier 3 that travels among the plurality of the spinning units 2.
  • the yarn joining carrier 3 includes the drive source (the air pressure cylinder 49) that moves the contacting surface 30 between the standby position and the yarn removal position.
  • the yarn removal lever 28 is formed of a metal plate member, the width of the contacting surface 30 is constant.
  • the yarn removal lever 28 may be formed by an appropriate member without being limited to the metal plate member. In this case, the width of the contacting surface 30 is not required to be constant.
  • a shape of a yarn removal member is not limited to a shape illustrated in the drawings.
  • a feature in which the contacting surface 30 that makes contact with the spun yarn 10 includes the first portion 31 and the second portion 32 that is located higher than the first portion 31 is essential, and shapes of the other portions are not limited and may be appropriately modified.
  • the yarn removal lever 28 is swung with the swing shaft 29 as a center.
  • the contacting surface 30 is thus moved in an arc shape.
  • the moving direction of the contacting surface 30 is not limited thereto, and the contacting surface 30 may be moved in a linear manner, for example.
  • the yarn accumulating roller 21 is driven and rotated in a clockwise direction when seen from downstream, but may be driven and rotated in a counterclockwise direction.
  • a direction in which the tip end 38a of the flyer 38 faces is opposite to a direction of the tip end 38 illustrated in FIG. 4A .
  • the shape of the yarn removal lever 28 is also opposite to a shape of the yarn removal lever 28 illustrated in FIG. 4A in a left-right direction.
  • the configuration of the spinning unit 2 may be appropriately modified.
  • a pair of delivery rollers adapted to transport the spun yarn 10 by being rotationally driven with the spun yarn 10 therebetween may be provided between the spinning device 9 and the yarn accumulating device 12.
  • the drive source (the air pressure cylinder 49) that moves the contacting surface 30 of the yarn removal lever 28 is provided to the yarn joining carrier (the service carrier) 3, but the drive source may be provided to each spinning unit 2 in place of or in addition to such a configuration.
  • a service carrier to which the drive source is provided is the yarn joining carrier 3.
  • the drive source may be provided to another type of service carrier that travels among a plurality of yarn winding units.
  • a doffing carrier may be provided to a yarn winding machine, and the drive source may be provided to the doffing carrier.
  • the doffing carrier is a service carrier adapted, when a package 45 is completed in the winding device 13 of a certain yarn winding unit, to remove the package 45 from the winding device 13 and to supply a new (empty) bobbin 48 to the winding device 13.
  • a yarn accumulating device of the present invention may be applied to another type of textile machine in which a yarn is required to be temporarily accumulated, without limited to a spinning unit.
  • a "yarn" accumulated by the yarn accumulating device of the present invention is not limited to a spun yarn in particular and widely includes a thread such as a rove, for example.
  • the yarn joining carrier 3 and/or the doffing carrier may be arranged in plurality in accordance with the number of the spinning units 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP15153002.9A 2014-02-25 2015-01-29 Garnsammelvorrichtung, Garnwickeleinheit damit und Garnwickelmaschine damit Not-in-force EP2910507B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014034718A JP2015161032A (ja) 2014-02-25 2014-02-25 糸貯留装置、これを備えた糸巻取ユニット、及びこれを備えた糸巻取機

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EP2910507A1 true EP2910507A1 (de) 2015-08-26
EP2910507B1 EP2910507B1 (de) 2016-08-31

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JP (1) JP2015161032A (de)
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JP2017065898A (ja) * 2015-09-30 2017-04-06 村田機械株式会社 糸掛け部材、糸貯留装置、及び糸巻取機

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EP1407995A2 (de) * 2002-10-07 2004-04-14 Murata Kikai Kabushiki Kaisha Vorrichtung zur Beseitigung von Fadenlockerungen in Spinnmaschinen
EP2213773A1 (de) * 2009-01-29 2010-08-04 Murata Machinery, Ltd. Vorrichtung zur Aufnahme des Garnendes und damit ausgerüstete Spinnmaschine
EP2573217A2 (de) * 2011-09-21 2013-03-27 Murata Machinery, Ltd. Spinneinheit, Spinnmaschine und Garnverarbeitungsverfahren
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JP2015161032A (ja) 2015-09-07
CN104860125B (zh) 2019-06-14
CN104860125A (zh) 2015-08-26
EP2910507B1 (de) 2016-08-31

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