US3038213A - Drafting mechanism for textiles - Google Patents

Drafting mechanism for textiles Download PDF

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Publication number
US3038213A
US3038213A US773459A US77345958A US3038213A US 3038213 A US3038213 A US 3038213A US 773459 A US773459 A US 773459A US 77345958 A US77345958 A US 77345958A US 3038213 A US3038213 A US 3038213A
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US
United States
Prior art keywords
apron
spring
guide bar
cage
drafting
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
US773459A
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English (en)
Inventor
Kramer Rolf Walter
Schrotz Kurt
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.)
SKF GmbH
Original Assignee
SKF Kugellagerfabriken GmbH
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 SKF Kugellagerfabriken GmbH filed Critical SKF Kugellagerfabriken GmbH
Application granted granted Critical
Publication of US3038213A publication Critical patent/US3038213A/en
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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
    • D01H5/70—Constructional features of drafting elements
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
    • D01H5/88—Cradles; Tensors
    • 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

Definitions

  • the invention is concerned with mechanisms which comprise an upwardly pivotable top roll carrier and loading arm which carries guide arms to be pivotable relative to the plane of the drafting field.
  • the guide arms are provided with loading saddles for receiving twin top rollers.
  • At least one pair of top rollers is engaged by aprons, each of which is passed over an apron cage supported on the journal of the pair of top rollers, and having a rigid guide bar.
  • Each apron is tensioned by a resilient member.
  • Drafting mechanisms are already known in which top aprons are passed over a front guide member formed as roller, and are tensioned by a cleaning roller pressing from above on the aprons by its own weight.
  • This construction is intended primarily for drafting mechanisms having top rollers which are mounted in end bearings, and cannot be used for centrally mounted top rollers since the space available in the latter case is insufficient for such an arrangement. tions, the guiding, and in particular the lateral guiding, of the aprons is inaccurate, so that accurate running of the aprons during operation is not ensured.
  • th ront guide bar for the top aprons is resilient and acts also as tensioning means for the apron.
  • this arrangement economizes in space, it has the serious disadvantage that the front apron-guiding edge is not in any fixed position in relation to the axis of the corresponding top rollers, so that displacements of the front gripping point in the drafting field occur, depending on the tension or extensibility of the aprons.
  • the prior construction is complicated and comparatively expensive to manufacture.
  • the primary object of the present invention is to eliminate the aforesaid disadvantages and to provide an improved drafting mechanism.
  • the resilient tension members may, in accordance with the invention, take the form of a spring which is adapted to be mounted by securing members either on the apron cage or on its guide bar.
  • the securing members themselves may conveniently comprise complementary and inter-engaging projections and recesses on the top apron cage or the guide bar, on the one hand, and on the resilient members, on the other.
  • protuberances or the like may be formed on the guide bar of the top apron cage and may be adapted to engage corresponding holes in the spring when made of flat material.
  • pins connected to the guide bar of the top apron cage may engage holes in the springs.
  • the springs may surround the guide bar, when viewed relative to the fiber passage through the mechanism, from the front and/or from the rear or from both sides and may be laid or pushed on the bar.
  • An advantage of the constructions according to the invention is that the apron-guiding edges of the guide bar does not require to be machined if the spring surrounds the guiding edge from the front and thus forms a wear-resistant edge to engage the apron.
  • the latter are preferably formed in one piece and may consist of flat material, as already mentioned, or may be formed of round material. It will readily be possible to select material of appropriate hardness or resiliency to meet the working conditions.
  • Tensioning of the aprons may be effected by the spring pressing from the interior against the apron at a position remote from the drafting field.
  • a wire spring may engage the apron from above by means or in form of a resilient stirrup, and may be held on projections on the top apron cage with the aid of co-operating eye portions of the wire, and bent end portions of the wire may lie against the face of the cage.
  • the spring material used will preferably be round material.
  • FIG. 1 is a perspective view of a top apron holder, according to the invention, for drafting mechanisms for textiles;
  • FIG. 2 shows a modified construction in cross-section
  • FIG. 3 shows another modification in plan
  • FIG. 4 is a section taken in the plane of the line IV-IV of FIG. 3.-
  • a top apron cage 1 is formed with saddle-shaped parts 2 to engage in a manner known per se the journal 3 of centrally supported and laterally arranged twin top rollers.
  • the top apron cage 1, together with the twin top rollers, is held by a saddle 24, indicated in FIG. 4, which surrounds the journal 3 between the parts 2 and pivotally carries the assembly so that it can be raised and lowered, from or toward the operative position, in relation to the lower apron.
  • the top apron cage 1 At its front edge, has a part which is bent downwardly and forms a guide bar 5.
  • a spring tension member 6 Placed on the bar 5, for each of the top rollers, is a spring tension member 6 which, with slots 7, engages over pins 8 carried in the guide bar 5 and corresponding in diameter to the width of the slots 7.
  • the member 6 has a curved upper edge to engage the inside of the apron at a position remote from the drafting field, and to ten, sion it.
  • Member 6, furthermore, has laterally bent lugs 9, the inner distance between which corresponds substantially to the width of the top apron 10 indicated in dash-dot lines in the right-hand half of FIG. 1. On their side facing the front guiding edge of the bar 5, the lugs 9 are bent outwardly so as not to impede the running of the apron.
  • the springs 6 When assembled on the top apron cage 1, the springs 6 assume a position in which the lugs 9 are exactly at right angles to the axis of the top rollers. Since the 3 I lateral lugs 9 are arranged close to the upper edge of springs 6 which bear against the aprons 10, the latter cannot run beyond the lateral guides.
  • a spring 14 likewise formed from flat material surrounds the guide bar of the top apron cage 1, and is held by pins 8 which engage corresponding holes in the spring 14, thus securing the spring in its position.
  • the spring 14 can be pushed into the bar 5 from the ends of the latter.
  • bent-up lugs 15 having an outwardly bent edge are provided.
  • the spring 14 has a circularly formed upper edge which bears from the interior against the top apron and tensions the latter.
  • FIGS. 3 and 4 an embodiment of the invention is shown in which a wire spring 16 is provided for tensioning the top apron 10-.
  • the spring 16 surrounds the top apron 10 stirrup-wise from above and is held by eyes 17 on projections 18 on the top apron cage 1. Bent-overend portions 19 of the spring 16 lie against the underface of the top apron cage 1 or the guide bar 5 and thus form a firm support.
  • lateral guiding of the apron is provided by parts 16 of the spring 16, which parts 16 run parallel to the apron edge. As Will be seen from FIG.
  • the bar 5 of the top apron cage 1 carries a set screw 20 to engage, in a manner known per se, a guide bar 21 for a bottom apron 22,. partly indicated in the drawing, so that the position of the bar 5 can be adjusted relatively to the pair of rolls 23 and 23'.
  • a spring is provided which bears upon the saddle 24 which, in turn, surrounds the journal of the top rollers.
  • the spring 25 engages the top apron cage 1 at the rear, as shown in FIG. 4, but in the constructions shown in FIG. 1, such spring may be secured in recesses 26 in the top apron cage 1.
  • an apron drafting mechanism for textiles a support, at least a single pair of spaced top rollers mounted on said support for rotation about an axis, an apron cage mounted on the support between said rollers and including an elongated guide bar longitudinally extending in a direction substantially parallel to said axis, two endless drafting aprons, each of said aprons trained over one of the top rollers and the guide bar, two resilient tensioning members separately secured to said guide bar, each tensioning member having an elongated portion resiliently bearing from the outside against and independently of the other tensioning member, tensioning the respective apron, the tensioning members being formed as springs, the springs being substantially coextensive with the aprons in said direction.
  • the tensioning members being formed from spring wire.
  • each ten- Sioning member being formed to constitute guiding means for lateral guiding contact of the respective apron.
  • each tensioning member being substantially stirrup-shaped and including two end portions secured to the guide bar, and a central portion constituting said elongated portion.
  • the guide bar being provided with two pairs of opposite projections, each two end portions being formed as a pair of eyes to releasably engage the respective pair of proectlons.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US773459A 1957-11-15 1958-11-12 Drafting mechanism for textiles Expired - Lifetime US3038213A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES55915A DE1098417B (de) 1957-11-15 1957-11-15 Spannvorrichtung fuer ein in einem Riemchenkaefig mit starrer Wendeschiene gefuehrtes Oberriemchen fuer Spinnereimaschinen-Streckwerke

Publications (1)

Publication Number Publication Date
US3038213A true US3038213A (en) 1962-06-12

Family

ID=7490757

Family Applications (1)

Application Number Title Priority Date Filing Date
US773459A Expired - Lifetime US3038213A (en) 1957-11-15 1958-11-12 Drafting mechanism for textiles

Country Status (6)

Country Link
US (1) US3038213A (xx)
BE (1) BE572567A (xx)
CH (1) CH362951A (xx)
DE (1) DE1098417B (xx)
FR (1) FR1207305A (xx)
GB (1) GB848747A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4538329A (en) * 1980-10-31 1985-09-03 Murata Kikai Kabushiki Kaisha Draft device
CN106757574A (zh) * 2017-01-20 2017-05-31 东华大学 一种具有集聚作用的纺纱牵伸装置
CN110616479A (zh) * 2018-11-07 2019-12-27 徐时平 环锭纺细纱机的纤维须条输送机构

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429010A (en) * 1964-08-19 1969-02-25 Goffredo Fusaroli Drawing device for textile fiber preparation
DE102009030367A1 (de) * 2009-06-25 2010-12-30 Oerlikon Textile Components Gmbh Oberriemchenhalter für Streckwerke von Spinnereimaschinen
CN110485020B (zh) * 2019-06-30 2021-07-13 苏州聚慧邦信息科技有限公司 一种用于纺织纱线的定程牵拉装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191514228A (en) * 1915-04-14 1916-05-11 Fernando Casablancas Improvements in Mechanism for Drawing Fibres in Spinning and like Machines.
DE911225C (de) * 1951-10-09 1954-05-10 Anton Hoffmann Dipl Ing Unterriemchen-Streckwerk fuer langfaserige Lunten
US2708290A (en) * 1951-11-30 1955-05-17 Skf Kugellagerfabriken Gmbh Double belt drawing mechanism
BE552764A (xx) * 1955-05-18 1960-01-15 Rieter Joh Jacob & Cie Ag

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1485417U (xx) * 1900-01-01
US1559281A (en) * 1924-05-10 1925-10-27 Rushton James Lever Drawing mechanism for ring-spinning frames and the like
AT182654B (de) * 1951-11-30 1955-07-25 Skf Kugellagerfabriken Gmbh Zweiriemchenstreckwerk
DE1657123U (de) * 1953-02-18 1953-06-11 Rollenlager Spindelfabrik Spin Vorrichtung fuer zweiriemchenstreckwerke.
GB745615A (en) * 1953-12-21 1956-02-29 Tmm Research Ltd Improvements in the drafting apparatus of textile spinning machines
DE1001931B (de) * 1954-06-23 1957-01-31 Michael Reiter Doppelriemchen-Streckwerk, insbesondere fuer lange Fasern
FR1484462A (xx) * 1965-06-25 1967-09-15

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191514228A (en) * 1915-04-14 1916-05-11 Fernando Casablancas Improvements in Mechanism for Drawing Fibres in Spinning and like Machines.
DE911225C (de) * 1951-10-09 1954-05-10 Anton Hoffmann Dipl Ing Unterriemchen-Streckwerk fuer langfaserige Lunten
US2708290A (en) * 1951-11-30 1955-05-17 Skf Kugellagerfabriken Gmbh Double belt drawing mechanism
BE552764A (xx) * 1955-05-18 1960-01-15 Rieter Joh Jacob & Cie Ag

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4538329A (en) * 1980-10-31 1985-09-03 Murata Kikai Kabushiki Kaisha Draft device
CN106757574A (zh) * 2017-01-20 2017-05-31 东华大学 一种具有集聚作用的纺纱牵伸装置
CN110616479A (zh) * 2018-11-07 2019-12-27 徐时平 环锭纺细纱机的纤维须条输送机构

Also Published As

Publication number Publication date
BE572567A (xx) 1962-07-13
GB848747A (xx) 1960-09-21
FR1207305A (fr) 1960-02-16
DE1098417B (de) 1961-01-26
CH362951A (de) 1962-06-30

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