EP2460916A2 - Entwurfsvorrichtung in einem Vorspulverfahren - Google Patents

Entwurfsvorrichtung in einem Vorspulverfahren Download PDF

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Publication number
EP2460916A2
EP2460916A2 EP20110191673 EP11191673A EP2460916A2 EP 2460916 A2 EP2460916 A2 EP 2460916A2 EP 20110191673 EP20110191673 EP 20110191673 EP 11191673 A EP11191673 A EP 11191673A EP 2460916 A2 EP2460916 A2 EP 2460916A2
Authority
EP
European Patent Office
Prior art keywords
tension
cap
belt
urging force
draft device
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.)
Withdrawn
Application number
EP20110191673
Other languages
English (en)
French (fr)
Inventor
Motohiro Kawai
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 EP2460916A2 publication Critical patent/EP2460916A2/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/24—Driving or stopping arrangements for twisting or spinning arrangements, e.g. spindles
    • D01H1/241—Driving or stopping arrangements for twisting or spinning arrangements, e.g. spindles driven by belt

Definitions

  • the present invention relates generally to a draft device and, more particularly, to a draft device having belt-driven bottom rollers having adjustable roller gauge and used in the prespinning process in which a plurality of slivers is drafted by the draft device used in, e.g., a drawing frame and a comber, and combined into a strand of sliver.
  • roller gauge the nip distance of the rollers (hereinafter referred to as "roller gauge") is adjusted depending on the type of fibers to be spun by a spinning machine.
  • the roller gauge is adjusted after the belt is loosened and subsequently the tension of the belt is adjusted to a desired value by a tension adjustment device.
  • the tension of the belt is also adjusted by the tension adjustment device.
  • the draft device has drive pulleys 71, 72 that are driven by a flat belt 73 and a deflecting roller 74 provided between the drive pulleys 71 and 72 for changing the running direction P of the flat belt 73.
  • Tension of the flat belt 73 is adjusted by another deflecting roller 76 having a tension lever 75 fixed thereto.
  • the tension lever 75 is pivotally supported on a shaft 77.
  • the deflecting roller 76 is urged through the tension lever 75 by a spring 78 whose length is set to a predetermined dimension so that the flat belt 73 is provided with an initial predetermined tension.
  • the position of the deflecting roller 76 is fixed on the above condition by a clamp screw 79.
  • the tension lever 75 is tilted in the counterclockwise direction in FIG. 6 against the urging force of the spring 78 thereby to reduce the tension of the flat belt 73 and then the clamp screw 79 is tightened to fix the tension lever 75 in its tilted position.
  • the tension lever 75 and the clamp screw 79 are located below the drive pulleys 71, 72 of the draft device.
  • the positions of the tension lever 75 and the clamp screw 79 are located below the frame to which the bracket supporting the bottom rollers of the draft device is adjustably mounted, with the result that it is troublesome to release the urging force of the spring 78 in changing the roller gauge. Additionally, the adjusted tension of the flat belt 73 may be varied depending on a work person performing the adjustment.
  • the present invention is directed to providing a draft device which allows a work person to release the tension of the belt easily in roller gauge adjustment and also to adjust the tension of the belt properly and easily after having adjusted the roller gauge.
  • a draft device in the prespinning process includes a bottom roller whose roller gauge is adjustable, a belt for driving the bottom roller, a tension pulley that can urge the belt downward, a support member for supporting the tension pulley, an urging member that can urge the support member downward so as to provide a desired tension to the belt through the tension pulley and an urging force releasing device for releasing an urging force of the urging member.
  • the urging force releasing device is provided above the tension pulley so as to be operable above the tension pulley.
  • the draft device according to the embodiment is designated generally by numeral 11.
  • a plurality of slivers supplied from a plurality of combing heads (not shown) or from a plurality of cans of a drawing frame (not shown) is drafted in the draft device 11 and delivered to a coiler 13 through a gatherer 12.
  • the draft device 11 is of a three-roller type having a front bottom roller 14, a middle bottom roller 15 and a back bottom roller 16.
  • a front top roller 17, a middle top roller 18 and a back top roller 19 are provided at positions corresponding to the front bottom roller 14, the middle bottom roller 15 and the back bottom roller 16, respectively.
  • the bottom rollers 14, 15, 16 and the top rollers 17, 18, 19 form three pairs of rollers, namely front, middle and back pairs of bottom and top rollers, respectively.
  • a deflecting roller 20 is provided in front of the front bottom roller 14 with respect to the traveling direction of fleece F for changing the traveling direction of the fleece F delivered from the pair of front bottom and front top rollers 14, 17 to downward movement.
  • the coiler 13 includes a coiler trumpet 21, a pair of coiler calendar rollers 22 and a tube wheel 23.
  • the sliver S traveling downward from the gatherer 12 is passed through the coiler trumpet 21 and the pair of coiler calendar rollers 22 to be pressed again thereby and delivered into a can 24 by the tube wheel 23.
  • the driving mechanism for the bottom rollers of the draft device 11 As shown in FIG. 4 , the front bottom roller 14 is rotatably supported between a pair of brackets 30 and a pulley 31 is fixedly mounted on one end of the front bottom roller 14 for rotation therewith. As shown in FIGS. 1 and 4 , the pulley 31 is driven by a drive motor 32 through a belt 35 that is wound around the pulley 31, another pulley 34 provided below the pulley 31 and a drive pulley 33 that is fixed on output shaft of the drive motor 32 for rotation therewith.
  • the middle bottom roller 15 is rotatably supported between a pair of brackets 36 and a pulley 37 is fixed on one end of the middle bottom roller 15 for rotation therewith.
  • the pair of brackets 36 are mounted to the frame (not shown) by bolts 38 in such a way that the position of the brackets 36 are adjustable in the direction perpendicular to the axial direction of the middle bottom roller 15.
  • the back bottom roller 16 is rotatably supported between a pair of brackets 39 and a pulley 40 is fixed on one end of the back bottom roller 16 for rotation therewith.
  • the pair of brackets 39 are fixed to the frame (not shown) by bolts 41 at a position that is adjustable in the direction perpendicular to the axial direction of the back bottom roller 16.
  • the back bottom roller 16 is driven by a drive motor 42 through a belt 48 that is wound around four pulleys 40, 44, 45, 46, a tension pulley 47 and a drive pulley 43 that is fixed on the output shaft of the drive motor 42 for rotation therewith.
  • the middle bottom roller 15 is driven by a drive motor 49 through a belt 50.
  • the drive motors 42 and 49 are disposed symmetrically with respect to an imaginary line extending across the front, middle and back bottom rollers 14, 15, 16 at the longitudinal center thereof as seen in FIG. 4 .
  • the middle bottom roller 15 is driven by the drive motor 49 through the belt 50 that is wound around four pulleys 37, 52, 53 (one pulley is hidden behind the pulleys 52, 53 in the drawing), a tension pulley 55 and a drive pulley 51 that is fixed on the output shaft of the drive motor 49 for rotation therewith.
  • the driving mechanism for the middle bottom roller 15 is omitted in FIG. 1 .
  • the belts 35, 48, 50 are made of toothed belt and the drive pulleys 33, 43, 51 and other pulleys (e.g. pulleys 40, 45, 46) are made of toothed pulley. All the pulleys are engaged with and wound around by the toothed belts.
  • the tension adjustment device 56 includes a housing 59, a support member 58, a tension pulley 47 and a cylindrical guide 61 having a small-diameter portion 61A and a large-diameter portion 61 B.
  • the tension pulley 47 is rotatably supported by the support member 58 that is supported by the housing 59 in such a way that the support member 58 is movable in vertical direction relative to the housing 59. As shown in FIGS.
  • the support member 58 is formed in L-shape and has formed therethrough in lower part thereof an elongated hole 58A extending in vertical direction.
  • the guide 61 is fixed to the housing 59 by a bolt 60 (shown in FIGS. 3A and 4 ) and the guide 61 is engaged at the small-diameter portion 61A thereof with the elongated hole 58A.
  • the guide 61 is in contact at the large-diameter portion 61 B thereof with the surface of the support member 58 on the tension pulley 47 side thereof and the support member 58 is guided vertically in a manner that the small-diameter portion 61A of the guide 61 slides in the elongated hole 58A.
  • a spring such as a coil spring 62 as the urging member of the present invention is fixed at the lower end thereof to the upper surface of the support member 58 for urging the support member 58 downward.
  • the tension adjustment device 56 further includes a support part 63 that is formed to project horizontally from the upper potion of the housing 59 and has formed therethrough a screw hole 63A at a position corresponding to the coil spring 62.
  • a cap 64 is screwed into the support part 63 so that the external thread 64B of the cap 64 is engaged with the screw hole 63A of the support part 63.
  • the cap 64 is formed therein with a recess 64A receiving therein the upper portion of the coil spring 62.
  • contact of the head of the cap 64 with the upper surface of the support part 63 serves to prevent the cap 64 from being screwed in further.
  • the cap 64 has formed in the upper surface of the head thereof a recess 64C that is engageable with the tip of a screwdriver.
  • the cap 64 functions as the urging force releasing device of the present invention for releasing the urging force of the coil spring 62.
  • the front bottom roller 14, the middle bottom roller 15 and the back bottom roller 16 are driven by the drive motors 32, 49, 42, respectively, at such speeds that provide the desired draft ratio.
  • a plurality of slivers S is drafted into a plurality of fleece F at the desired draft ratio and delivered from the paired front rollers.
  • the plurality of fleece F are passed through the gatherer 12 and the coiler trumpet 21, collected into a strand of sliver S, pressed again through the paired coiler calendar rollers 22 of the coiler 13 and delivered into a can 24 through the tube wheel 23.
  • the middle bottom roller 15 and the back bottom roller 16, whose roller gauges are adjustable, are driven through the belts 48, 50 provided with a desired tension by the tension pulleys 47, 55 that are urged downward, respectively.
  • the tension pulleys 47, 55 provide the tension to the belts 48, 50 by the coil springs 62 urging the support members 58 of the tension pulleys 47, 55 downward, respectively.
  • the work person releases the urging force of the tension pulleys 47, 55 on the belts 48, 50, respectively, by removing the cap 64 from the support part 63. Then, the positions of the back bottom roller 16 and the middle bottom roller 15 are adjusted by changing the fixing positions of the brackets 39, 36 so as to adjust the roller gauge to a target value.
  • the work person may remove the cap 64 by putting the tip of the screwdriver in the recess 64C of the cap 64 and turning the screwdriver.
  • the work person can operate the urging force releasing device easily for releasing the urging force of the coil spring 62 because the cap 64 as the urging force releasing device is located above the tension pulleys 47, 55.
  • the work person screws the cap 64 into the screw hole 63A of the support part 63 until the external thread 64B of the cap 64 is prevented from being screwed into the screw hole 63A further, in other words, until the head of the cap 64 comes in contact with the upper surface of the support part 63.
  • the tension adjustment devices 56, 57 are set to a state in which the coil springs 62 urge the tension pulleys 47, 55 through the support members 58 so as to provide the desired tension to the belts 48, 50, respectively.
  • the belt 48 or 50 When the belt 48 or 50 is lengthened due to the temporal change, the belt 48 or 50 needs to be replaced by a new one.
  • the coil spring 62 of the tension adjustment device 56 or 57 needs to be changed to a spring that provide the desired tension to the lengthened belt 48 or 50 through the support member 58 and the tension pulley 47 or 55.
  • the tension adjustment device 56 or 57 of the present embodiment allows the coil spring 62 to be replaced by a new one having a spring constant that provides the lengthened belt 48 or 50 with the same urging force as that before the belt 48 or 50 was lengthened.
  • the tension adjustment device 56 of the present embodiment also allows the cap 64 to be replaced by a new one that is formed with a recess, such as 64A, having a depth that permits the cap when screwed into contact with the upper surface of the support part 63 to provide the desired tension to the lengthened belt 48 or 50.
  • the draft device 11 according to the embodiment of the present invention offers the following advantageous effects.
  • the present invention is not limited to the above embodiment, but may be practiced in various ways as exemplified below.
  • a draft device in the prespinning process includes a bottom roller whose roller gauge is adjustable, a belt for driving the bottom roller, a tension pulley that can urge the belt downward, a support member for supporting the tension pulley, an urging member that can urge the support member downward so as to provide a desired tension to the belt through the tension pulley and an urging force releasing device for releasing an urging force of the urging member.
  • the urging force releasing device is provided above the tension pulley so as to be operable above the tension pulley.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
EP20110191673 2010-12-03 2011-12-02 Entwurfsvorrichtung in einem Vorspulverfahren Withdrawn EP2460916A2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2010270074A JP2012117181A (ja) 2010-12-03 2010-12-03 前紡工程のドラフト装置

Publications (1)

Publication Number Publication Date
EP2460916A2 true EP2460916A2 (de) 2012-06-06

Family

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Family Applications (1)

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EP20110191673 Withdrawn EP2460916A2 (de) 2010-12-03 2011-12-02 Entwurfsvorrichtung in einem Vorspulverfahren

Country Status (3)

Country Link
EP (1) EP2460916A2 (de)
JP (1) JP2012117181A (de)
CN (1) CN102534885A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114393861B (zh) * 2022-01-11 2023-11-10 浙江机电职业技术学院 一种纺纱机龙带涨紧导轮及其导轮加工方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103320908B (zh) * 2012-03-21 2015-12-02 江苏凯宫机械股份有限公司 棉纺精梳机牵伸调节装置
CN109436949B (zh) * 2018-12-12 2024-03-19 浙江太阳洲电气科技有限公司 一种张力调节装置和针织输送设备

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05502271A (ja) 1990-10-09 1993-04-22 シューベルト、ウント、ザルツェル、マシーネン　ファブリーク、アクチェンゲゼルシャフト スライバを引延ばすドラフト装置

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DE2044996A1 (de) * 1970-09-11 1972-03-16 Schubert & Salzer Maschinen Verfahren und Vorrichtung zum Verziehen von Faserbändern
JPH01150059A (ja) * 1987-12-05 1989-06-13 Tokyo Jido Kiko Kk ベルト二段伝達機
JPH0222376U (de) * 1988-07-28 1990-02-14
DE3934576A1 (de) * 1989-10-17 1991-04-25 Schubert & Salzer Maschinen Streckwerk zum verziehen von faserbaendern
DE4438946A1 (de) * 1994-10-31 1996-05-02 Zinser Textilmaschinen Gmbh Doppelriemchen-Streckwerk
JPH10237725A (ja) * 1997-02-25 1998-09-08 Murata Mach Ltd ドラフトローラの駆動装置
DE10330950A1 (de) * 2003-07-08 2005-02-03 Rieter Ingolstadt Spinnereimaschinenbau Ag Textilmaschine, insbesondere Spinnereivorbereitungsmaschine mit einem Streckwerk
JP2005179857A (ja) * 2003-12-22 2005-07-07 Murata Mach Ltd ドラフト装置
DE102004056682A1 (de) * 2004-11-17 2006-05-18 Wilhelm Stahlecker Gmbh Belastungseinrichtung für Druckwalzen von Spinnmaschinen-Streckwerken
DE102007020448B4 (de) * 2007-04-27 2015-10-15 Trützschler GmbH & Co Kommanditgesellschaft Vorrichtung an einer Spinnereivorbereitungsmaschine, z.B. Strecke, Karde, Kämmmaschine o. dgl. mit einem Streckwerk
JP2009270642A (ja) * 2008-05-08 2009-11-19 Ntn Corp 油圧式オートテンショナ
CN101781819B (zh) * 2009-12-10 2011-10-05 经纬纺织机械股份有限公司 精梳机可调罗拉隔距的牵伸装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05502271A (ja) 1990-10-09 1993-04-22 シューベルト、ウント、ザルツェル、マシーネン　ファブリーク、アクチェンゲゼルシャフト スライバを引延ばすドラフト装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114393861B (zh) * 2022-01-11 2023-11-10 浙江机电职业技术学院 一种纺纱机龙带涨紧导轮及其导轮加工方法

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JP2012117181A (ja) 2012-06-21
CN102534885A (zh) 2012-07-04

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