US3587990A - Transfer device for broken yarns - Google Patents

Transfer device for broken yarns Download PDF

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Publication number
US3587990A
US3587990A US889850A US3587990DA US3587990A US 3587990 A US3587990 A US 3587990A US 889850 A US889850 A US 889850A US 3587990D A US3587990D A US 3587990DA US 3587990 A US3587990 A US 3587990A
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US
United States
Prior art keywords
yarn
gripper
carrier
transfer device
carrier means
Prior art date
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Expired - Lifetime
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US889850A
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English (en)
Inventor
Premysl Kostelecky
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.)
Elitex Zavody Textilniho
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Elitex Zavody Textilniho
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Publication date
Application filed by Elitex Zavody Textilniho filed Critical Elitex Zavody Textilniho
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Publication of US3587990A publication Critical patent/US3587990A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B65H63/088—Clamping device
    • 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

Definitions

  • Yarn transfer devices of this type require a continuous drive of the exhauster providing the auction at a comparatively high cost. If no yarn breakage takes place. the continuous operation of the exhauster is useless. Furthermore, suction transfer devices are not completely reliable and depend, for example. on mounting the suction device precisely adjacent the point where yarn breakage is expected.
  • Another yarn transfer device has movable arms carrying transfer means by which the yarn is gripped and delivered to the knotting mechanism.
  • the yarn can be transferred satisfactorily only to a special knotting mechanism, but not to a yarn brake or similar device provided in an automatic winding machine.
  • a knotting mechanism for example, a periodically moving carrier is located which supports gripper means and a cutter to which the gripped yarn end is transported by the gripper means so that the broken yarn end is cut off before delivered to the knotting mechanism.
  • One embodiment of the invention comprises carrier means movable between a yarn-receiving position, an intermediate position, and a yarn delivery position, and being moved in the event of yarn breakage by drive means; gripper means mounted on the carrier means and being movable between an open position, a yarn-gripping position, and a cutting position cooperating with a cutting means on the carrier means; and control means connected with the gripper means for moving the same, and being operated by the carrier means during movement of the same.
  • control means which preferably include a stationary cam and a cam follower means connected with the gripper means, is that the gripper means is in the open position for receiving a broken yarn when the carrier means is in the receiving position, is in the gripping position gripping the broken yarn when the carrier means is in the intermediate position, and moves to the cutting position before the carrier means arrives at the delivery position.
  • the cutting means cuts the yarn off, and the yarn is delivered in the delivery position to a knotting mechanism, for example, where the control means moves the gripper means to the open position, whereupon the carrier means are returned to the yarnreceiving position.
  • the carrier means includes a carrier arm on a drive shaft and having a transversely projecting guide arm on which the, gripper means are mounted.
  • the gripper means include a first gripper member resiliently attached to the guide arm and a second gripper member mounted on the guide arm for movement, and connected with the cam follower of the control means.
  • a drive shaft I carries the hub 2 of a carrier arm 3 whose free end has a horizontal transversely projecting hollow guide arm 30.
  • a tubular abutment 4 is secured to guide arm 3a by screw 40 and has a central opening though which a gripper rod 7 passes.
  • Gripper rod 7 has a T-shaped jaw 8 at one end, and is pivotally connected at the other end with an angular lever 9 mounted on carrier arm 10 for pivotal movement about a pivot 10.
  • the other arm of angular lever 9 is pivotably connected with a rod 11 guided in portions 12 of carrier arm 3 and having at the lower end, a cam follower roller 13 in contact with the peripheral surface of a stationary cam 14 due to the action of a spring, not shown.
  • cam follower roller I3 moves along the peripheral cam track of the stationary cam 14 and displaces angular lever 9 about pivot 10 so that gripper member 7,8 is moved between the position shown in FIGS. 1 and 2, and the position shown in FIGS. 3 and 4.
  • a gripper tube 6 is inserted into the guide way formed by the hollow guide arm 3a, and abuts a spring 5 which surrounds the gripper rod 7 and abuts abutment 4.
  • a stop screw 19 is threaded through the wall of the guide arm 30 and projects into a slot in gripper member 6 so that the same assumes the position shown in FIGS. I and 2 due to the action of spring 5, but can be moved toward the left as viewed in the drawing by compressing spring 5.
  • Gripper member 6 has an annular rim forming a jaw cooperating with jaw 8 of gripper member 7,8.
  • the two gripper members 6 and 7,8 form in the open position shown in FIGS. I and 2, a gap for receiving a yarn 16 which is facilitated by a guiding projection 15 at the end of guide arm 30 whose slanted face is located adjacent the inner face of gripper jaw 8, as best seen in FIG. 2.
  • a cutter I7 is secured by screw 18 to guide arm 3a, and has a cutting edge portion located along the path of movement of gripper jaw 8 which is spaced from the cutting edge in the position of FIG. 2, but crosses the same in the position of FIG. 4 whereby a yarn I6 clamped between gripper member 6 and 7,8 is cut off while being gripped so that the portion of the yarn is cut off.
  • Gripper members 6 and 7,8 have the open position shown in FIGS. 1 and 2 for receiving a yarn 16.
  • gripper member 7,8 When gripper member 7,8 is moved to the left as viewed in the drawing, jaw 8 abuts the end of gripper member 6, clamping yarn I6.
  • gripper member 7,8 When gripper member 7,8 is further moved to the left as viewed in the drawing, gripper member 6 is displaced in the same direction while spring 5 resiliently yields, and yarn end 16 remains gripped.
  • both gripper members arrive in the position shown in FIGS. 3 and 4
  • the gripped yarn 16 is removed across the cutting edge of cutter I7, and the yarn end 16 is cut off.
  • shaft 1 Upon receiving the impulse of the sensing means, shaft 1 turns carrier means 2,3,3a,4 with the gripper means to a position in which the gripper means are located in the proximity of the breakage point.
  • Cam I4 is designed in such a manner that the portion of the cam track thereof engaged by cam follower roller 13 urges gripper 7,8 through the linkage 11,9 to the open position shown in FIGS. 1 and 2, so that the yarn 16 enters the gap between the jaws of the gripper members, as shown in FIGS. 1 and 2, sliding on the slanted face of guide projection 15, or on the slanted back of cutting means 17.
  • the carrier means now complete their angular movement and arrive in a delivery position in which the gripped and cutoff yarn I6 is engaged by the knotting mechanism, whereupon carrier means 2,3,4,3a is moved to a position in which cam follower 13 is controlled by the stationary cam 14 to move the linkage 11,9 to the position shown in FIGS. 1 and 2 so that the device is ready for another yarn breakage.
  • Cutoff yarn portion 160 may be removed by a suction device.
  • carrier means 3,3a,4 turns in a continuous motion to its original position of rest.
  • Yarn transfer device comprising, in combination, carrier means movable between a yarn receiving position, an intermediate position, and a yarn delivery position; drive means for moving said carrier means between said positions upon a yarn breakage; cutting means mounted on sad carrier means; gripper means mounted on said carrier means for movement with the same and for movement relative to the same between an open position, a yarn gripping position, and a cutting position cooperating with said cutting means; and control means connected with said gripper means for moving the same between said positions of the same, and being operated by said carrier means during movement of the same so that gripper means is in said carrier open position for receiving the broken yarn when said carrier means is in said receiving position, is in said gripping position gripping the broken yarn when said carrier means is in said intermediate position, and moves to said cutting position before said carrier means arrives at said delivery position so that said cutting means cuts the yarn off and the cut on yarn is delivered in said delivery position in which said control means move said gripper means to said open position.
  • control means include a stationary cam, and a linkage mounted on said carrier means and including a cam follower cooperating with said cam during movement of said carrier means, said linkage being connected with said gripper means for moving the same between said positions of the same under the control of the cam portions engaged by said cam follower in said positions of said carrier means.
  • said drive means includes a shaft; wherein said carrier means includes a carrier arm carried by said shaft for angular movement between said positions of said shaft carrier means, and having a transversely projecting guide arm at the free end thereof; and wherein said gripper means are mounted on said guide arm, and include a first gripper member attached to said guide arm, and a second gripper member mounted on said guide arm for movement between said positions of said gripper means; and wherein said second gripper member is connected with said control means.
  • control means include a stationary cam, and a linkage mounted on said carrier means and including a cam follower cooperating with said cam during movement of said carrier means, said linkage being connected with said second gripper means for moving the same between said positions of the same under the control of the cam portions engaged by said cam follower in said positions of said carrier means.
  • Yarn transfer device as claimed in claim 5 wherein said guide arm is hollow; wherein said first gripper member is guided in said hollow guide arm for movement and has a guide way in which said second gripper member is mounted for movement between said positions thereof; and wherein said carrier means include an abutment in said guide way, said resilient means being a spring in said guide way abutting said abutment and said first gripper member and urging the latter toward said second gripper member, and an adjustable stop mounted on said guide arm and limiting movement of said first gripper member toward said second gripper member.
  • control means include a stationary cam coaxial with said shaft, and a linkage mounted on said carrier means and including a cam follower cooperating with said cam during movement of said carrier means, said linkage being connected with said second gripper means for moving the same between said positions of the same under the control of the cam portions engaged by said cam follower in said positions of said carrier means.
  • said linkage includes a rod mounted on said carrier arm for longitudinal movement; wherein said cam follower is a roller mounted at one end of said rod; said linkage further including tion; and wherein said guide arm of said carrier means has a guiding projection located adjacent said second jaw in said open position of said gripper means for guiding the yarn into said gap in said receiving position of said carrier means.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Knitting Machines (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Basic Packing Technique (AREA)
US889850A 1968-12-13 1969-12-15 Transfer device for broken yarns Expired - Lifetime US3587990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS847068 1968-12-13

Publications (1)

Publication Number Publication Date
US3587990A true US3587990A (en) 1971-06-28

Family

ID=5435247

Family Applications (1)

Application Number Title Priority Date Filing Date
US889850A Expired - Lifetime US3587990A (en) 1968-12-13 1969-12-15 Transfer device for broken yarns

Country Status (5)

Country Link
US (1) US3587990A (fr)
CH (1) CH503654A (fr)
DE (1) DE1961377A1 (fr)
FR (1) FR2026110A1 (fr)
GB (1) GB1297967A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3862648A (en) * 1973-06-05 1975-01-28 Vyzk Ustav Bavlnarsky Weft thread clamp and cutter for travelling-wave shedding looms
US3892432A (en) * 1974-03-01 1975-07-01 George A Ingus Continuous yarn drawing method and apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3862648A (en) * 1973-06-05 1975-01-28 Vyzk Ustav Bavlnarsky Weft thread clamp and cutter for travelling-wave shedding looms
US3892432A (en) * 1974-03-01 1975-07-01 George A Ingus Continuous yarn drawing method and apparatus

Also Published As

Publication number Publication date
GB1297967A (fr) 1972-11-29
DE1961377A1 (de) 1970-07-02
CH503654A (de) 1971-02-28
FR2026110A1 (fr) 1970-09-11

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