EP1911865B1 - Fiber bundle collecting device for a spinning machine - Google Patents

Fiber bundle collecting device for a spinning machine Download PDF

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Publication number
EP1911865B1
EP1911865B1 EP20070118226 EP07118226A EP1911865B1 EP 1911865 B1 EP1911865 B1 EP 1911865B1 EP 20070118226 EP20070118226 EP 20070118226 EP 07118226 A EP07118226 A EP 07118226A EP 1911865 B1 EP1911865 B1 EP 1911865B1
Authority
EP
European Patent Office
Prior art keywords
apron
fiber bundle
guide
collecting device
bar
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.)
Not-in-force
Application number
EP20070118226
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1911865A2 (en
EP1911865A3 (en
Inventor
Naoki Maruyama
Yoshimasa Fujii
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.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of EP1911865A2 publication Critical patent/EP1911865A2/en
Publication of EP1911865A3 publication Critical patent/EP1911865A3/en
Application granted granted Critical
Publication of EP1911865B1 publication Critical patent/EP1911865B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/72—Fibre-condensing guides

Definitions

  • the present invention relates to a fiber bundle collecting device for a spinning machine and, more particularly, to a device arranged downstream of a drafting device (or drafting part) of a fine spinning machine for collecting fiber bundle drafted by the drafting device.
  • fiber bundle collecting devices for collecting drafted fiber bundle before twisting for the purpose of improvement of yarn quality by reducing fluff in the fiber bundle.
  • an endless perforated belt or air-permeable apron
  • the fiber bundle collecting device is arranged downstream of final roller pairs 61 which form part of a drafting device, including nip roller pairs 62, suction pipes 63 and air-permeable aprons 64.
  • the top nip roller 62b of the nip roller pair 62 is pressed against its counterpart bottom nip roller 62a through the apron 64.
  • the suction pipe 63 is arranged upstream of the nip point of the nip roller pairs 62 as seen in the direction of movement of the fiber bundle F, and has a guide surface with suction holes 63a. Downstream of the nip point of the nip roller pair 62 is arranged an apron guide 65 having an arcuate cross section as viewed in the direction of movement of the fiber bundle F.
  • sliver collecting zone 73 is located downstream of the front roller pairs (final roller pair) 71 of a drafting device as viewed in the direction of movement of the fiber bundle F and the fiber bundle collecting device 72 is provided in the zone 73.
  • the fiber bundle collecting device 72 includes a suction shoe 74, turning rollers 75, 76, and a perforated apron 77 which is wound around the suction shoe 74 and the turning rollers 75, 76.
  • the sliver collecting zone 73 is defined by and between two nip positions K1, K2.
  • the first nip position K1 is a position where the fiber bundle F is nipped by the top roller 71a and the bottom roller 71 b of the front roller pair 71.
  • the second nip position K2 is a position where the perforated apron 77 is pressed against the top roller 71a by the turning roller 75.
  • the fiber bundle collecting device is made such that the apron 64 moves in contact with the bottom nip roller 62a not only at the side thereof where the fiber bundle F is guided, but also at the radially opposite side of the bottom nip roller 62a, with the result that the space S formed by the apron 64, the bottom nip roller 62a and the suction pipe 63 is narrow.
  • the bottom nip roller 62a and the suction pipe 63 are provided as one unit, e.g., for each four spindles of the spinning machine, the space S for the spindles located at the opposite ends of each unit is formed as a dead-end space having no way for cotton fly to escape therefrom. Therefore, the fly tends to be accumulated easily in the space S and the accumulated fly presses the apron 64 in operation. This will result in extra energy required for driving the apron 64 and shortened serviceable life of the apron 64.
  • the fiber bundle collecting device 72 uses the turning roller 76 whose diameter is smaller than that of the other turning roller 75 which defines the second nip position K2 with the top roller 71a and the turning roller 76 around which the apron 77 turns or changes its moving direction is located farther away from the turning roller 75 than in the case of the collecting device of the first reference of Fig. 6 .
  • the apron 77 moves in contact with the turning roller 75 in the region where the apron 77 is wound around the turning roller 75 and the apron 77 in the other region travels remote from the turning roller 75. Therefore, fly tends to be less accumulated in the fiber bundle collecting device 72 of the second reference than in the fiber bundle collecting device of the first reference.
  • the fiber bundle collecting device 72 uses the turning roller 76 whose diameter is small, however, the path along which the apron 77 travels from the turning roller 75 to the turning roller 76 is spaced away from the original yarn path which is indicated by chain double-dashed line in Fig. 7 .
  • Part of fibers of the fiber bundle F is attached to the apron 77 when the fiber bundle F passes through the sliver collecting zone 73, and the attached fibers are released from the apron 77 in the region where the apron 77 just moves away from the turning roller 75, so that the fiber bundle F is removed from the apron 77. Therefore, the fiber bundle F is actually drawn out from the fiber bundle collecting device 72 through a path which is indicated by the chain line of Fig.
  • the turning roller 76 should be arranged close to the original yarn path. In this case, however, it becomes hard to ensure provision of a sufficient space below the turning roller 75.
  • the present invention is directed to a fiber bundle collecting device which permits the provision of a space necessary for installing the fiber bundle collecting device and lengthens the cleaning interval and the serviceable period of life of the apron.
  • the present invention provides a fiber bundle collecting device for a spinning machine for collecting a fiber bundle drafted by a draft part of the spinning machine.
  • the fiber bundle collecting device includes a delivery portion, a suction pipe, an apron guide and an air-permeable apron.
  • the delivery portion is located downstream of a final delivery roller pair of the draft part as viewed in a direction of movement of the fiber bundle and has nip rollers.
  • the suction pipe is located upstream of a nip point of the delivery portion as viewed in the direction of movement of the fiber bundle and has a guide surface with a suction hole.
  • the apron guide is located downstream of the nip point of the delivery portion as viewed in the direction of movement of the fiber bundle.
  • the air-permeable apron is wound around the suction pipe, one of the nip rollers and the apron guide so as to be rotated thereround.
  • the apron guide is adapted to guide the apron so that the apron travels along a path spaced away from the nip roller on the side of the nip roller opposite to part of the nip roller which guides the fiber bundle.
  • the apron guide is also adapted to guide the apron along a plane on the side of the apron guide where the apron is wound.
  • the fiber bundle collecting device of the present embodiment has substantially the same structure as that of Japanese Patent Application Publication No. 2004-100094 which has been previously filed by the present applicant, except the apron guide thereof.
  • the fiber bundle collecting device 11 is located downstream of final delivery roller pairs 13 of the drafting device 12 as viewed in the direction of movement of the fiber bundle F.
  • the drafting device 12 serves as a drafting part of the spinning machine.
  • the fiber bundle collecting device 11 includes delivery portions 14, suction pipes 15, air-permeable aprons 16 and apron guides 17.
  • Each delivery portion 14 has a bottom nip roller 18a that serves as a nip roller and a top nip roller 19.
  • the bottom nip roller 18a is formed as a part of a rotary shaft 18 which is arranged parallel to the front bottom roller 13a of the final delivery roller pair 13.
  • the top nip roller 19 is pressed against the bottom nip roller 18a through the apron 16.
  • the two top nip rollers 19 are supported by a weighting arm (not shown) through a support member 20 for each two spindles of the spinning machine.
  • the support member 20 is formed integrally with a support member for the two front top rollers 13b.
  • the suction pipe 15 is located upstream of the nip points of the delivery portions 14 as viewed in the direction of movement of the fiber bundle F and has a guide surface 15b with suction holes 15a.
  • bottom components of the fiber bundle collecting device 11 are provided by half of the spindles arranged between roller stands 21 of the drafting device 12 as one unit, or four spindles in this embodiment.
  • a support arm 22 which is supported at the proximal end thereof by a support beam (not shown) extending in the longitudinal direction of the spinning machine, with the rotary shaft 18 supported between the roller stand 21 and the support arm 22.
  • the rotary shaft 18 is formed in a predetermined length corresponding to a plurality of spindles (or four spindles in this embodiment), and bearings 23 fixed to opposite ends of the rotary shaft 18 are fitted in end plugs 24.
  • the end plugs 24 are supported at the fitting portions 24a thereof by support portions 21 a, 22a which are provided in the roller stands 21 and the support arm 22, respectively, whereby each of the rotary shafts 18 is rotatably supported by the roller stand 21 and the support arm 22.
  • Each of the support portions 21a, 22a is formed so as to be capable of supporting two end plugs 24, thus making it possible to support the end plugs 24 mounted to any two adjacent ends of two different rotary shafts 18.
  • a gear 25 is fixedly mounted at an intermediate position on the rotary shaft 18 for rotation therewith.
  • the front bottom roller 13a is formed with a gear 13c at a position facing the gear 25 (not shown in Fig. 1A ).
  • a support arm 26 which is fixed at the proximal end thereof to the support beam (not shown) in the same manner as the support arm 22 and an intermediate gear 27 is rotatably supported by the support arm 26 for engagement with the gear 13c and the gear 25.
  • torque of the front bottom roller 13a is transmitted to the rotary shaft 18 through the gear 13c, the intermediate gear 27 and the gear 25.
  • a suction duct (not shown) is arranged in the fine spinning machine extending in the longitudinal direction thereof (or the direction perpendicular to the plane of Fig. 1A ).
  • the suction pipe 15 extends parallel to the suction duct and connected thereto through a connection tube 28.
  • the suction pipe 15 is supported by a pair of the end plugs 24 in the same manner as the rotary shaft 18 is supported by being fitted in the paired end plugs 24.
  • the apron guide 17 is located downstream of the nip point of the delivery portion 14 as viewed in the direction of movement of the fiber bundle F.
  • the apron guide 17 is adapted for guiding the apron 16 in such a way that the apron 16 travels along a path spaced away from the circumferential surface of the bottom nip roller 18a when moving in the region remote and opposite to the part of the bottom nip roller 18a where the fiber bundle F is guided, as shown in Fig. 1B .
  • the apron guide 17 is formed so as to guide the apron 16 along a plane on the side of the apron guide 17 where the apron 16 is wound.
  • the apron guide 17 has tensioning means 29 (shown in Fig. 4B ) for providing tension to the apron 16.
  • the apron guide 17 has a plate-like bar 30 which extends in the axial direction of the bottom nip roller 18a and is supported by a pair of end plugs 24 in which the opposite ends of the bar 30 are fitted.
  • the bar 30 has a bent portion 30a which is formed at one side of the width direction (in a direction perpendicular to the axial direction of the bottom nip roller 18a) of the bar 30 and extends over the entire length of the bar 30.
  • the tensioning means 29 has a pressing member 31 which is formed with a bent portion 31 a and supported by the bar 30 so as to be movable in the width direction of the bar 30 and a spring member 32 which urges the pressing member 31 in the direction which causes the bent portion 31 a of the pressing member 31 to move away from the bar 30.
  • the pressing member 31 is bent so that its cross section has a U-shape, as shown in Fig. 3A .
  • the bar 30 has four projections 30b on the side thereof adjacent to the bottom nip roller 18a at positions corresponding to the mounting position of the pressing members 31 and extending in the width direction of the bar 30.
  • the pressing member 31 is formed with substantially the same width as the apron 16.
  • a pair of projections 31 b is formed for each pressing member 31 on the side thereof facing the apron 16 for regulating the movement of the apron 16 in width direction.
  • An elongated hole 31c which is longer than the projection 30b is formed in the pressing member 31 at a position corresponding to the projection 30b in an assembled state of the tensioning means 29, as shown in Fig. 4B .
  • the pressing member 31 is mounted on the bar 30 with the projection 30b received loosely in the elongated hole 31c.
  • the spring member 32 includes two coil portions 32a, a connecting portion 32b connecting the two coil portions 32a at one ends thereof and two pressing portions 32c extending from the other ends of the two coil portions 32a at an angle to the connecting portion 32b and in an intersecting relation to each other.
  • the bar 30 is formed with a pair of recesses 30c for each pressing member 31 for engagement with the coil portions 32a.
  • the tensioning means 29 and the apron 16 In mounting the tensioning means 29 and the apron 16 in place, firstly the coil portions 32a of the spring member 32 are engaged with the paired recesses 30c of the bar 30 with the apron 16 moved away from its mounting position, as shown in Fig. 4B . Then, the pressing member 31 is mounted on the bar 30 so as to hold the spring member 32 and the bar 30. In this state, the pressing member 31 is pushed against the urging force of the spring member 32 and then the apron 16 is moved to a position where the apron 16 is wound around the bar 30 and the pressing member 31. Accordingly, the apron 16 is mounted in place.
  • the apron 16 is wound around the suction pipe 15, the apron guide 17 and the bottom nip roller 18a in contact therewith.
  • the apron 16 is rotated by the bottom nip roller 18a while having sliding contact with the guide surface 15b and the pressing member 31.
  • the apron 16 is formed by woven fabric which has an appropriate air permeability.
  • a suction nozzle 33 of a single type pneumatic device whose nozzle end is located below the apron guide 17 for each spindle.
  • the suction nozzle 33 is adapted to draw in the fiber bundle F delivered from the drafting device 12 in the event of yarn breakage.
  • the proximal end of the suction nozzle 33 is connected to a pneumatic duct (not shown) which is common to all spindles of the spinning machine.
  • the fiber bundle collecting device 11 In operation of the fine spinning machine, the fiber bundle F drafted by the drafting device 12 is guided from the final delivery roller pair 13 to the fiber bundle collecting device 11.
  • the bottom nip roller 18a and the top nip roller 19 are rotated at substantially the same surface speed as the final delivery roller pair 13, and the fiber bundle F passes through the nip point of the bottom and top rollers 18a, 19 under an appropriate tension before moving downstream while being turned and twisted.
  • the suction of the duct is exerted to the suction pipe 15 through the connection tube 28, and the suction of the suction holes 15a formed on the guide surface 15b is exerted to the fiber bundle F through the apron 16.
  • the fiber bundle F is subjected to sucking and collecting at positions corresponding to the suction holes 15a.
  • the apron is arranged to move in contact with the bottom nip roller on the side thereof that is opposite the part of the bottom nip roller which guides the fiber bundle, as indicated by double dashed-chain line in Fig. 1B , and, therefore, a narrow wedge-shaped space is formed between the suction pipe and the bottom nip roller as indicated by S in Fig. 1B . Therefore, fly generated during the operation of the fine spinning machine is accumulated easily in a space between the bottom nip roller 18a and the curved surface of the suction pipe 15 which follows the circumferential surface of the bottom nip roller 18a. Once fly has been thus accumulated in the space, the fly accumulation is increased to extend out of the wedge-shaped space S. Depending on the condition of the spinning operation, the fly accumulation is increased in about a week to such an extent that affects the spinning results.
  • the apron 16 travels along a path that is spaced away from the bottom nip roller 18a on the side of the bottom nip roller 18a that is opposite to the part thereof which guides the fiber bundle F, as shown by solid line in Fig. 1B , therefore, the wedge-shaped space S formed between the suction pipe 15 and the bottom nip roller 18a is open to a larger space. Therefore, fly tends to be less accumulated in the space between the suction pipe 15 and the bottom nip roller 18a. Additionally, it takes a longer time before the fly accumulation is increased to an extent that presses the apron 16 thereby to affect the traveling of the apron 16.
  • the cleaning interval of the fiber bundle collecting device 11 of the present embodiment can be extended in comparison with that of devices of the background art. The cleaning interval can be extended about two to three times longer as compared with the background devices.
  • the path of the apron 16 projects downstream with respect to the direction of movement of the fiber bundle F, which makes it hard to ensure the space for the fiber bundle collecting device 11.
  • a pneumatic device of a single nozzle type it is easy for the apron 16 to interfere with the suction nozzle 33. Since the apron guide 17 of the present embodiment is adapted to guide the apron 16 along a plane on the side of the apron guide 17 where the apron 16 is wound, the above problem is resolved.
  • the apron 16 moves along a plane. That is, the apron guide 17 guides the apron 16 along a plane on the side of the apron guide 17 where the apron 16 is wound. Therefore, if the bent portion 31 a of the pressing member 31 is spaced away from the path of the fiber bundle F and the bent portion 30a of the bar 30 is arranged near the path of the fiber bundle F, it is easy to ensure the space necessary for installing the fiber bundle collecting device 11.
  • This embodiment provides the following effects.
  • the present invention is not limited to the above-described embodiment but may be implemented as follows.
  • the bar 30 does not necessarily have to have a bent portion 30a which extends over the entire length of the bar 30 at one side of the width thereof.
  • the bar 30 having the bent portion 30a may be made thinner without affecting the strength of the bar 30.
  • the apron guide 17 has only to be adapted to guide the apron 16 so that the apron 16 travels along a path spaced away from the bottom nip roller 18a on the side of the bottom nip roller 18a opposite to the part of the bottom nip roller 18a which guides the fiber bundle F and to guide the apron 16 along a plane on the side of the apron guide 17 where the apron 16 is wound.
  • the apron guide 17 does not necessarily have to have the bar 30.
  • two round bars 34 or two rollers may be arranged so as to extend parallel to the bottom nip roller 18a. In such a case, tensioning means may be provided in such a way that the opposite ends of one of the round bars 34 are urged by any suitable springs.
  • the tensioning means 29 is not limited to the structure as shown in Figs. 4A and 4B wherein the pressing member 31 and the spring member 32 which are separate from the bar 30 are mounted on the bar 30, but the spring member may be fixed to the bar 30 and the pressing member 31.
  • the spring member does not necessarily have to have a coil portion.
  • the tensioning means may be arranged in other places than the apron guide 17.
  • providing the tensioning means to the apron guide 17 is advantageous in that installation space is secured and also the device can be made simple.
  • the present invention may dispense with the tensioning means.
  • the apron 16 of woven fabric
  • knitted fabric for the apron 16.
  • appropriate air permeability is obtained without the trouble of making small holes through the belt which forms the apron 16 and, therefore, the apron of such knitted fabric can be manufactured with less cost.
  • the apron made of knitted fabric can be rotated under an appropriate tension without the use of a tension device by virtue of stretchability of the knitted fabric.
  • apron 16 of woven fabric or knitted fabric
  • the rotary shaft 18 and the suction pipe 15 may be provided not only for four spindles as one unit, but for spindles arranged between the roller stands 21 (for example, eight spindles) as one unit. Additionally, each unit does not necessarily have the same number of spindles. Two different kinds of units may be employed by arranging the spindles between the roller stands 21 into two different numbers of spindles (for example, six spindles and two spindles).
  • the rotary shaft 18 having the bottom nip roller 18a may be provided as a shaft which is common to all of the spindles.
  • the rotary shaft 18 may be driven by a motor through a gear train provided on the gear end of the spinning machine substantially in the same manner as the front bottom roller 13a of the drafting device 12.
  • a pneumatic device of a single nozzle type instead of a pneumatic device of a single nozzle type, a pneumatic device of a flute type may be employed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP20070118226 2006-10-11 2007-10-10 Fiber bundle collecting device for a spinning machine Not-in-force EP1911865B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006277714A JP4844336B2 (ja) 2006-10-11 2006-10-11 紡機における繊維束集束装置

Publications (3)

Publication Number Publication Date
EP1911865A2 EP1911865A2 (en) 2008-04-16
EP1911865A3 EP1911865A3 (en) 2009-11-11
EP1911865B1 true EP1911865B1 (en) 2012-06-06

Family

ID=38963231

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070118226 Not-in-force EP1911865B1 (en) 2006-10-11 2007-10-10 Fiber bundle collecting device for a spinning machine

Country Status (3)

Country Link
EP (1) EP1911865B1 (zh)
JP (1) JP4844336B2 (zh)
CN (1) CN101270516B (zh)

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ITBS20130120A1 (it) * 2013-08-05 2015-02-06 Marzoli Spa Dispositivo di compattazione di un nastro di fibre tessili in un filatoio
CN104831423B (zh) * 2015-04-27 2017-05-03 东华大学 一种在梳棉机集束过程中提高棉条质量的装置及方法
JP6409795B2 (ja) * 2016-02-19 2018-10-24 株式会社豊田自動織機 紡機のドラフト装置におけるエプロンテンション装置
JP6720781B2 (ja) * 2016-08-31 2020-07-08 株式会社豊田自動織機 紡機における繊維束集束装置
DE102017130224A1 (de) * 2017-12-15 2019-06-19 Maschinenfabrik Rieter Ag Streckwerk und Verdichtungsvorrichtung für eine Spinnereimaschine
CN111601919B (zh) * 2018-01-26 2022-06-28 东丽株式会社 耐火化纤维束和碳纤维束的制造方法
JP7180333B2 (ja) 2018-12-04 2022-11-30 株式会社豊田自動織機 紡機の繊維束集束装置
JP2020176342A (ja) * 2019-04-18 2020-10-29 株式会社豊田自動織機 紡機の繊維束集束装置
DE102019115219A1 (de) * 2019-06-05 2020-12-10 Maschinenfabrik Rieter Ag Saugrohr für eine Verdichtungsvorrichtung und Vorrichtung zum pneumatischen Verdichten eines verstreckten Faserverbandes
JP7251345B2 (ja) 2019-06-19 2023-04-04 株式会社豊田自動織機 精紡機
JP2021175835A (ja) * 2020-05-01 2021-11-04 株式会社豊田自動織機 紡機における繊維束集束装置
CN112481756A (zh) * 2020-12-18 2021-03-12 汤永学 一种皮圈下销

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GB1574928A (en) * 1977-11-04 1980-09-10 Tsukumo Z Guiding device for an endless apron
JPS5611272A (en) * 1979-07-11 1981-02-04 Seiko Epson Corp Ink feeding apparatus for wire-dot matrix printer
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JP2001207344A (ja) * 2000-01-25 2001-08-03 Yoji Kitamura エプロンテンションレバー及びエプロンテンション装置
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JP3786069B2 (ja) * 2002-09-17 2006-06-14 株式会社豊田自動織機 紡機の繊維束集束装置
JP4179227B2 (ja) * 2004-05-28 2008-11-12 株式会社豊田自動織機 紡機における繊維束集束装置

Also Published As

Publication number Publication date
JP4844336B2 (ja) 2011-12-28
CN101270516A (zh) 2008-09-24
CN101270516B (zh) 2010-12-22
EP1911865A2 (en) 2008-04-16
EP1911865A3 (en) 2009-11-11
JP2008095233A (ja) 2008-04-24

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