EP0707100B1 - Streckwerk in Spinnereimaschine - Google Patents

Streckwerk in Spinnereimaschine Download PDF

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Publication number
EP0707100B1
EP0707100B1 EP95115980A EP95115980A EP0707100B1 EP 0707100 B1 EP0707100 B1 EP 0707100B1 EP 95115980 A EP95115980 A EP 95115980A EP 95115980 A EP95115980 A EP 95115980A EP 0707100 B1 EP0707100 B1 EP 0707100B1
Authority
EP
European Patent Office
Prior art keywords
support shaft
roller
weight roller
apron
cradle
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.)
Expired - Lifetime
Application number
EP95115980A
Other languages
English (en)
French (fr)
Other versions
EP0707100A2 (de
EP0707100A3 (de
Inventor
Hitoshi c/o K.K. Toyoda Jidoshokki Aizawa
Tetsuya c/o K.K. Toyoda Jidoshokki Ashizaki
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
Toyoda Jidoshokki Seisakusho KK
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 Toyoda Jidoshokki Seisakusho KK filed Critical Toyoda Jidoshokki Seisakusho KK
Publication of EP0707100A2 publication Critical patent/EP0707100A2/de
Publication of EP0707100A3 publication Critical patent/EP0707100A3/de
Application granted granted Critical
Publication of EP0707100B1 publication Critical patent/EP0707100B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • D01H5/46—Loading arrangements
    • D01H5/48—Loading arrangements using weights
    • 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
    • D01H5/70—Constructional features of drafting elements
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
    • D01H5/88—Cradles; Tensors

Definitions

  • the present invention relates to a drafting apparatus in a spinning machine according to the preamble of claim 1. More particularly, the present invention relates to an apron drafting system drafting apparatus which is particularly suitable for long fiber spinning.
  • a drafting apparatus in a spinning machine is used for drafting a roving into a thinner yarn and to uniformize the thickness of the yarn.
  • an apron drafting system drafting apparatus in which a pair of aprons consisting of endless rubber belts are each wrapped around a tensor and a drive roller. The tensors apply tension to the aprons, while the drive rollers rotate the aprons. A roving fed between the pair of aprons is drafted with the rotation of the aprons.
  • JP-B-28-5631 discloses a drafting apparatus in which a fluted roller is located at the middle of the lower apron to support the upper inner surface of the lower apron, while a weight roller is located at the middle of the upper apron to oppose the fluted roller and to contact the lower inner surface of the upper apron.
  • the constitution of the weight roller is not specifically disclosed.
  • FIG. 6 A generic drafting apparatus having such a weight roller at the middle of the apron is shown in Figs. 6 and 7.
  • a top cradle 34 is located on a bottom apron 33.
  • An intermediate bottom roller 35 is located at the middle of the bottom apron 33 to be in contact with it.
  • the top cradle 34 comprises a pair of side walls 34a,34b and a top plate 34c connecting the side walls 34a,34b.
  • a top apron 36 is wrapped around a top tensor 37 and a top roller 38.
  • the side walls 34a,34b contain supporting holes 39 in alignment with the intermediate bottom roller 35 respectively.
  • the ends of a support shaft 40 carrying a cylindrical weight roller 41 around it are inserted in the supporting holes 39.
  • a restricting piece 42 for restricting longitudinal movement of the support shaft 40 is pivotally supported by a pin 43 on the outer surfaces of the side wall 34a.
  • the top apron 36 is designed to be pressed by the weight of the weight roller 41 to secure an appropriate fiber nipping state.
  • the apron apparatus having such a weight roller 41 is attached to each spindle of the spinning machine.
  • the present invention was accomplished in view of the problems described above, and it is an object of the invention to provide a drafting apparatus that facilitates detaching and mounting of the weight roller located at the middle of the top apron without removing the top apron from the top roller.
  • a first embodiment of the present invention in a double-spindle type drafting apparatus will be described below referring to Figs. 1 and 2.
  • a bottom apron 1 is wrapped around a bottom roller 2 serving as a drive roller, a bottom tensor bar 3 and an intermediate bottom roller 4 is located between the roller 2 and the tensor bar 3.
  • the bottom tensor bar 3 is secured at a predetermined position such that each end portion may protrude beyond each side edge of the bottom apron 1.
  • a top cradle 5 which is made of a metal, comprises a pair of side walls 6a,6b and a top plate 6c connecting these side walls 6a,6b.
  • a top tensor 7 common to two spindles of the spinning machine is secured at the middle on the top plate 6c at a front position.
  • the right and left side portions of the top tensor 7 are adapted to oppose the two spindles respectively. Since these side portions are substantially symmetrical, the central portion and the left side portion are shown in Fig. 1 and the right side portion is omitted.
  • a resin piece 8 for adjusting the tensor gauge is fitted at the front center of the top tensor 7.
  • Guide pieces 10 (only one guide piece is shown) for restricting crosswise shifting of the top apron 9 are secured on the lower surface of the top tensor 7 at each side portion.
  • An opening 6d is defined in the top plate 6c of the top cradle 5 adjacent to the rear end portion of the top tensor 7, and an engaging section 6e is formed on the top plate 6c to bend downward from the front edge of the opening 6d.
  • a leaf spring 12 for urging the top tensor 7 downward is fitted on the top plate 6c and is partly retained by the engaging section 6e.
  • the leaf spring 12 is bent to have a hair pin-like shape in side view, and the front loop is abutted against the upper surface of the top tensor 7.
  • a guide piece 11 having a pair of guiding sections 11a is fixed on the rear upper surface of the top plate 6c so as to restrict lateral shifting of the top apron 9.
  • Guide slits 13 opening downward are defined at the rear end portions of the side walls 6a,6b of the top cradle 5 respectively.
  • a support shaft 14a is inserted to the guide slits 13 and supported therein, and a pair of top rollers 14 (only one roller is shown) are supported at the ends of the support shaft 14a to be rotatable integrally with the shaft 14a.
  • the top apron 9 is wrapped around the top tensor 7 and the top roller 14.
  • a known weighting arm 15 (partly shown in broken lines in Fig. 2) supports a top front roller (not shown) and a top back roller (not shown).
  • a supporting arm 16 protrudes downward from the weighting arm 15 to rotatably support the support shaft 14a at its middle. In other words, the top cradle 5 is supported via the support shaft 14a on the weighting arm 15.
  • a support shaft 17 is located in the top cradle 5 such that it opposes the intermediate bottom roller 4.
  • the support shaft 17 penetrates one of the side walls 6a or 6b and is secured to one of these walls 6a or 6b.
  • a pair of weight rollers 18 (only one roller is shown) is loosely fitted to each end of the support shaft 17, and a portion of the outer surface of each weight roller 18 contacts the inner surface of the top apron 9. Accordingly, the support shaft 17 carrying the weight rollers 18 is cantilevered on the top cradle 5.
  • An annular recess 19 serving as an engaging section is defined on the inner surface of the weight roller 18.
  • the engagement recess 19 has a trapezoidal cross section.
  • a plurality of protrusions or engaging sections 20 serving as restricting sections are formed on the circumference of the support shaft 17 to engage with the outer extremity of the engagement recess 19.
  • the minimum inner diameter of the weight roller 18, i.e. the diameter of the weight roller 18 excluding the engagement recess 19, is designed to be greater than the maximum outer width dimension of the support shaft 17, i.e., the total width of the shaft including the protrusions 20. Accordingly, the protrusions 20 do not interfere with the weight roller 18 when the roller 18 is fitted onto the support shaft 17.
  • the weighting arm 15 When the weighting arm 15 is located at a pressing position (as shown in Fig. 2) where the arm 15 presses the front top roller (not shown) and the back top roller (not shown) toward the bottom roller (not shown), the lower surface of the weighting arm 15 engages with the leaf spring 12 to weakly urge the top tensor 7 toward the bottom apron 1.
  • the gauge between the top tensor 7 and the bottom tensor bar 3 is determined when the tensor gauge adjusting piece 8 is abutted against the upper surface of the bottom tensor bar 3.
  • the top apron 9 is brought into contact with the bottom apron 1 by the pressure of the top roller 14 toward the bottom roller 2, the weight of the weight roller 18 and the tension of the top apron 9.
  • the bottom apron 1 is rotated with the rotation of the bottom roller 2, while the top apron 9, which is brought into contact with the bottom apron 1, is rotated synchronously with the bottom apron 1 to transport a fiber bundle (not shown) in cooperation with the bottom apron 1.
  • the portions of the aprons 1,9 which are brought into contact with each other between the bottom roller 2 and the bottom tensor bar 3, i.e., the portions of the aprons 1,9 at which the fiber bundle is nipped and transported, have regions of relatively weak contacting forces. That is, if the distance between the bottom tensor bar 3 and the bottom roller 2 is relatively long, the contacting forces between the aprons 1,9 are relatively weak at the middle to exert a weak pressing force against the fiber bundle.
  • the intermediate bottom roller 4 is located such that a contacting force is applied near the middle of the bottom apron 1.
  • the weight roller 18 disposed to oppose the intermediate bottom roller 4 and to press the top apron 9 toward the bottom apron 1, so that a relatively strong force is applied to the fiber bundle.
  • the roller 18 While the weight roller 18 is removably and loosely fitted around the support shaft 17, the roller 18 is rotated while the engagement recess 19 is engaged with the protrusions 20, so that the weight roller 18 is restricted from shifting in the axial direction of the support shaft 17. Accordingly, the weight roller 18 cannot slip off the support shaft 17 during operation of the drafting apparatus, even if no supporting and restriction device is present at the ends of the weight roller 18. Further, the top apron 9 is driven while guided by the guide piece 10. The guiding section 11a restricts the aprons from shifting laterally.
  • the pressure applied by the weighting arm 15 is first released.
  • the weight roller 18 is held by an operator facing the free end of the support shaft 17 and is manipulated to be concentric with the support shaft 17 to disengage the protrusions 20 from the engagement recess 19.
  • the weight roller 18 is pulled toward the free end side of the support shaft 17 to detach the weight roller 18 from the support shaft 17. Since the minimum inner diameter of the weight roller 18 is bigger than the maximum outer width of the support shaft 7, the weight roller 18 can be detached easily.
  • a substitute weight roller 18 is fitted onto the support shaft 17 from the free end until the engagement recess 19 is aligned with the protrusions 20 to complete the replacement procedures.
  • the weight roller 18 is detached from the support shaft 17 in the same manner as described above. After the floccules tangled around the support shaft 17 and collected within the weight roller 18 are removed, the same weight roller 18 may be re-fitted onto the support shaft 17.
  • the weight roller 18 can be mounted and detached to and from the support shaft 17 with the top apron 9 remaining wrapped around the top tensor 7 and the top roller 14, replacement of the weight roller 18 and removal of floccules can be carried out more easily.
  • the weight roller 18 can be detached very easily from the support shaft 17 by bringing the weight roller 18 into a substantially concentric relationship with the support shaft 17 and pulling it toward the nearest free end of the shaft 17. Since the engaging section for restricting axial shifting of the weight roller 18 is simply the annular engagement recess 19, it can be formed easily.
  • top tensors 7, a pair of top rollers 14, a pair of weight rollers 18, and a pair of top aprons 9 are located in the top cradle 5 common to two spindles. Accordingly, the procedures of incorporating the drafting apparatus into the spinning machine can be halved compared with the prior art apparatus where a cradle is attached to each spindle.
  • a second embodiment of the invention will be described referring to Figs. 3A and 3B.
  • the constitution of this embodiment is the same as in the first embodiment, except that the constitution of the restricting section for restricting shifting of the weight roller 18 in the axial direction of the support shaft 17 is different.
  • the parts or members similar to those in the first embodiment are affixed with the same reference numbers respectively, and detailed description of them are omitted. Only the differences will be described below.
  • the support shaft 17 comprises a small diameter portion 17a locating on the free end and a large diameter portion 17b having an outer diameter bigger than the inner diameter of the weight roller 18.
  • the small diameter end portion 17a supports the weight roller 18.
  • the inside of the weight roller 18 is cylindrical and has no engagement recess.
  • the support shaft 17 has no engaging protrusions.
  • the weight roller 18 is fitted loosely around the small diameter portion 17a, and a resin cap 21 serving as an engaging member is fitted to the free end of the small diameter portion 17a such that it can be fitted on or pulled off easily.
  • a resin cap 21 serving as an engaging member is fitted to the free end of the small diameter portion 17a such that it can be fitted on or pulled off easily.
  • clearances are present between the end faces of the weight roller 18 and the opposing faces of the large diameter portion 17b and of the cap 21, respectively.
  • the weight roller 18 is rotated with the running of the top apron 9. Axial shifting of the roller 18 is restricted by the large diameter portion 17b and the cap 21.
  • the cap 21 is first removed. The operator then holds the weight roller 18 and pulls it toward the nearest end of the support shaft 17.
  • a weight roller 18 is to he mounted, it is fitted onto the support shaft 17 from the free end, and then the cap 21 is fitted on the small diameter portion 17a. Accordingly, the weight roller 18 can be mounted or detached easily as in the first embodiment.
  • a pin 22 may be removably fitted to the free end portion of the small diameter portion 17a as the engaging member in place of the cap 21, as shown in Fig. 3B. Since the weight roller 18 has a simple cylindrical shape in both cases, no special machining is required, and the weight roller 18 can be formed more easily than in the first embodiment.
  • the support shaft 17 is fitted to the top cradle 5 such that it may be easily removable from the top cradle 5.
  • a resin block 23 is fixed to it.
  • the block 23 contains a shaft receiving hole 24 and a spring retaining hole 25 communicating to the hole 24.
  • a coil spring 27 having a ball 26 being fixed to the inner end is retained in the hole 25 such that substantially a half of the ball 26 protrudes into the shaft receiving hole 24.
  • the support shaft 17 has an engagement groove 28 formed circumferentially at the proximal end portion and a large diameter restricting section 29 formed at the distal end.
  • the support shaft 17 is slidably fitted in the shaft receiving hole 24.
  • the support shaft 17 is positioned upon engagement of the ball 26 with the engagement groove 28 when the shaft 17 is slide-fitted in the hole 24.
  • the distance between the restricting section 29 and the outer surface of the block 23 on the top cradle 5 is slightly longer than the weight roller 18.
  • the weight roller 18 is abutted against the restricting section 29 to limit it from shifting toward the free end side of the support shaft 17, and is rotated with the running of the top apron 9.
  • the weight roller 18 When the weight roller 18 is to be replaced, an operator holds the restricting section 29 of the support shaft 17 and pulls toward the free end, and the ball 26 slips off the engagement groove 28 against the urging force of the coil spring 27 to allow the weight roller 18 to be detached from the top cradle 5 together with the support shaft 17. Then, the support shaft 17 carrying a substitute weight roller 18 is fitted in the shaft receiving hole 24 to complete replacement of the weight roller 18. Accordingly, the weight roller 18 need not be subjected to special machining and can be mounted or detached easily again in this embodiment.
  • shaft is cantilevered

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (10)

  1. Streckapparat in einer Spinnmaschine mit je einem Unterriemen (1) und einem Oberriemen (9), die um zwei Paare aus Antriebswalzen (2, 14) und Spannern (3, 7) gewunden sind, wobei der Unter- und der Oberriemen (1, 9) miteinander in Kontakt gebracht werden; einer Zwischen-Unterwalze (4), die mit den Unterriemen (1) in Eingriff ist; einer Gewichtswalze (18), die mit den Oberriemen (9) in Eingriff ist, so daß diese der Zwischen-Unterwalze (4) gegenüberliegt und den Oberriemen (9) durch ihr Eigengewicht zum Unterriemen (1) hin preßt; einem eine Seitenfläche aufweisenden Käfig (5) zum Stützen des Oberriemens (9); einer Unterstützungswelle (17), auf die die Gewichtswalze (18) lose gepaßt ist; und einem Begrenzungsteilabschnitt (20, 21, 22, 29) zum Begrenzen einer Verschiebung der Gewichtswalze (18) auf der Unterstützungswelle (17) dadurch gekennzeichnet, daß die Unterstützungswelle (17) so von der Seitenfläche des Käfigs (5) auskragend eingespannt ist, daß ein Ende der Unterstützungswelle (17) ein freies Ende ist, und daß der Begrenzungsteilabschnitt (20, 21, 22, 29) die Gewichtswalze (18) derart freigeben kann, daß die Gewichtswalze in einer Richtung weg von der Seitenfläche des Käfigs (5) über das freie Ende entfernbar ist.
  2. Apparat nach Patentanspruch 1, wobei die Gewichtswalze (18) rohrförmig ist und einen Eingriffsteilabschnitt (19) an ihrer Innenfläche hat, die Unterstützungswelle (17) einen kreisförmigen Querschnitt und einen am äußeren Umfang der Unterstützungswelle ausgebildeten Rückhalteteilabschnitt (20) hat, wobei der Rückhalteteilabschnitt (20) mit dem Eingriffsteilabschnitt (19) in Eingriff treten kann, der Rückhalteteilabschnitt (20) den Begrenzungsteilabschnitt bildet, und die Gewichtswalze (18) einen Mindestinnendurchmesser hat, der größer als eine Höchstbreite der Unterstützungswelle (17) ist.
  3. Apparat nach Patentanspruch 2, wobei der Eingriffsteilabschnitt eine ringförmige Vertiefung (19) umfaßt und der Rückhalteteilabschnitt einen Vorsprung (20) umfaßt.
  4. Apparat nach Patentanspruch 1, wobei das freie Ende (17a) der Unterstützungswelle von der Gewichtswalze (18) vorragt, wobei der Begrenzungsteilabschnitt ein Eingriffsbauteil (21, 22) aufweist, das abnehmbar mit dem freien Ende der Unterstützungswelle (17) verbunden ist, und wobei das Eingriffsbauteil so angepaßt ist, daß es an einer Endfläche der Gewichtswalze (18) anliegt.
  5. Apparat nach Patentanspruch 4, wobei das Eingriffsbauteil eine aus Harz angefertigte Kappe (21) ist, die so angepaßt ist, daß sie sich an die Unterstützungswelle (17) anschließt.
  6. Apparat nach Patentanspruch 1, wobei die Unterstützungswelle (17) abnehmbar an den Käfig (5) gekoppelt ist und wobei der Begrenzungsteilabschnitt am freien Ende der Unterstützungswelle vorgesehen ist, um die axiale Bewegung der Gewichtswalze (18) zu begrenzen.
  7. Apparat nach einem der Patentansprüche 1 bis 6, wobei der Streckapparat einen Käfig (5) hat, der für zwei Spindeln der Spinnmaschine gemeinsam ist, und wobei ein aus dem Spanner (7), dem Oberriemen (9) und der Gewichtswalze (18) bestehender Satz symmetrisch an beiden Seiten des Käfigs (5) gelegen ist.
  8. Apparat nach Patentanspruch 6, wobei der Käfig (5) eine Vielzahl von Löchern (20) hat, in die die Unterstützungswelle (17) wahlweise eingefügt ist.
  9. Apparat nach Patentanspruch 1, weiterhin mit einer Feder (12), die einen Spanner (7) zum anderen Spanner (3) hin drückt.
  10. Apparat nach Patentanspruch 1, weiterhin mit einer Einrichtung zum Anpassen eines Abstands zwischen den Spannern (3, 7).
EP95115980A 1994-10-11 1995-10-10 Streckwerk in Spinnereimaschine Expired - Lifetime EP0707100B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP6245624A JPH08109526A (ja) 1994-10-11 1994-10-11 紡機のドラフト装置
JP245624/94 1994-10-11
JP24562494 1994-10-11

Publications (3)

Publication Number Publication Date
EP0707100A2 EP0707100A2 (de) 1996-04-17
EP0707100A3 EP0707100A3 (de) 1996-08-21
EP0707100B1 true EP0707100B1 (de) 2000-05-31

Family

ID=17136456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95115980A Expired - Lifetime EP0707100B1 (de) 1994-10-11 1995-10-10 Streckwerk in Spinnereimaschine

Country Status (7)

Country Link
EP (1) EP0707100B1 (de)
JP (1) JPH08109526A (de)
KR (1) KR0137485B1 (de)
CN (1) CN1048047C (de)
BR (1) BR9504366A (de)
DE (1) DE69517278T2 (de)
TW (1) TW330594U (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3820951B2 (ja) * 2001-10-04 2006-09-13 株式会社豊田自動織機 紡機における繊維束集束装置
CN101876110B (zh) * 2010-07-30 2011-12-28 宁波民丰实业有限公司 尾部机构可接插式全碳纤上销及其制作方法
CN104452005A (zh) * 2014-11-20 2015-03-25 南通金驰机电有限公司 Ab多色段彩控制传动装置及ab多色段彩纺纱工艺

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE741141C (de) * 1940-05-12 1943-11-05 Hermann Kluftinger Dipl Ing Belastungseinrichtung fuer Streckwerke von Spinnereimaschinen
FR2273095B1 (de) * 1974-05-27 1976-10-15 Schlumberger Cie N
CH603840A5 (de) * 1975-09-12 1978-08-31 Rieter Ag Maschf
DE4215004A1 (de) * 1992-05-06 1993-11-11 Fritz Stahlecker Streckwerk für Spinnereimaschinen

Also Published As

Publication number Publication date
KR960014435A (ko) 1996-05-22
TW330594U (en) 1998-04-21
CN1048047C (zh) 2000-01-05
EP0707100A2 (de) 1996-04-17
EP0707100A3 (de) 1996-08-21
CN1129749A (zh) 1996-08-28
BR9504366A (pt) 1997-04-08
JPH08109526A (ja) 1996-04-30
DE69517278D1 (de) 2000-07-06
KR0137485B1 (ko) 1998-05-15
DE69517278T2 (de) 2001-01-18

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