EP3594386A1 - Compensation de dispositif de freinage de trame pour applications textiles - Google Patents

Compensation de dispositif de freinage de trame pour applications textiles Download PDF

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Publication number
EP3594386A1
EP3594386A1 EP19184501.5A EP19184501A EP3594386A1 EP 3594386 A1 EP3594386 A1 EP 3594386A1 EP 19184501 A EP19184501 A EP 19184501A EP 3594386 A1 EP3594386 A1 EP 3594386A1
Authority
EP
European Patent Office
Prior art keywords
yarn
brake device
weft brake
guide ring
compensating
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.)
Granted
Application number
EP19184501.5A
Other languages
German (de)
English (en)
Other versions
EP3594386B1 (fr
Inventor
Rosario Castelli
Giovanni Pedrini
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.)
LGL Electronics SpA
Original Assignee
LGL Electronics SpA
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Filing date
Publication date
Application filed by LGL Electronics SpA filed Critical LGL Electronics SpA
Publication of EP3594386A1 publication Critical patent/EP3594386A1/fr
Application granted granted Critical
Publication of EP3594386B1 publication Critical patent/EP3594386B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/347—Yarn brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/20—Co-operating surfaces mounted for relative movement
    • B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
    • B65H59/32—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged away from each other
    • 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

  • the present invention relates to a compensating weft brake device for textile applications.
  • the yarn can be taken from a distaff and sent to a textile machine downstream by way of a weft feeder of the "positive" type, i.e. provided with a motorized weft-winding drum that actively pays out the yarn.
  • a weft feeder of the "positive" type i.e. provided with a motorized weft-winding drum that actively pays out the yarn.
  • a compensating weft brake device can be interposed, the function of which is to dampen and compensate the variations in tension on the yarn while it is being unwound from the distaff.
  • a compensating weft brake device of this type is described in European patent no. EP1101851B1 by this same Applicant. It comprises a fixed body provided with two articulated arms that are coupled kinematically by way of gear sectors and are pushed toward a splayed configuration by a spring. The arms bear respective rows of yarn-guide rings in staggered positions, which are passed through alternately by the yarn with a zigzag path.
  • the arms react to peaks of tension by moving closer together in contrast with the elastic force of the spring, so as to provide the desired damping and compensating action.
  • the yarn-guide rings which are typically ceramic, are retained in respective semicircular seats provided on the arms either by elastic straps, or by locking pins, or by contoured locking elements that can be fixed to the arms and which are provided with semicircular counter-seats that are adapted to define, together with the semicircular seats on the arms, closed circular receptacles.
  • fixing systems while functional, entail the use of additional locking elements (elastic straps, pins, contoured locking elements) which, in addition to complicating the structure of the device, can be subject to deterioration (this is especially true for elastic straps) and/or they can weigh down the arms (this is especially true for contoured locking elements), increasing their inertia and consequently reducing the device's capacity to react.
  • additional locking elements elastic straps, pins, contoured locking elements
  • the aim of the present invention is therefore to improve the compensating weft brake devices of the type described above by providing a system for fixing the yarn-guide rings that is more practical and more reliable, but without compromising its simplicity and lightness.
  • an assembly for supplying yarn comprises two identical weft feeders 10 which, in a way that is per se known, are interconnected mechanically and electronically in a stacked configuration.
  • Each one of the weft feeders 10 comprises a receptacle 12 that supports a motorized yarn winding spool 14 that has a lightened aerodynamic structure.
  • the yarn winding spool 14 is functionally arranged between a yarn-guiding entry bush 16 and a yarn-guiding exit bush 18, both fixed to the receptacle 12.
  • the yarn passes through the yarn-guiding entry bush 16, is wound repeatedly (for example, three or four windings) between the yarn winding spool 14 and an oblique spacer pin 20 that is adapted to maintain the yarn loops axially spaced apart from each other, then passes through a tension sensor 22 that is adapted to monitor the output yarn tension for control purposes, and finally passes through the yarn-guiding exit bush 18 in order to be paid out to the downstream machine.
  • each one of the feeders 10 takes yarn from a respective distaff, not shown.
  • Two respective identical compensating weft brake devices 24 are arranged upstream of the two feeders 10, and are adapted to dampen and compensate the peaks of tension that may be generated on the yarn in the portion comprised between the distaff and the respective feeder 10. Both compensating weft brake devices 24 are mounted on a bracket 26 that is fixed to a support 28, on which the stack of feeders is hung.
  • each one of the compensating weft brake devices 24 comprises a body 30 that is provided with two articulated arms 32, 34 which are coupled kinematically by way of gear sectors, e.g. 36.
  • the arms 32, 34 are kept tensed in a splayed configuration by a torsion spring 37.
  • the spring 37 has one end 37a anchored to a seat 38 which is provided on one of the arms, the arm 32 in the example described herein.
  • the opposite end 37b of the spring 37 is coupled to a knob 39, which is pivoted to the body 30 by way of a screw V with a washer R.
  • the knob 39 is provided, at the base, with an undulating annular edge 39a which is pushed in axial engagement against a corresponding undulating annular abutment 30a of the body 30 by a small spring 40.
  • the small spring 40 is accommodated in an axial cylindrical seat 39b of the knob 39, and is functionally interposed between the washer R and the bottom 39c of the axial cylindrical seat 39b.
  • the knob 39 can be made to rotate by click-stops, defeating the elastic force of the small spring 40, between several angular positions determined by the engagement between the undulating annular edges, so as to adjust the elastic force that maintains the arms 32, 34 in a widened position.
  • the body 30 has an elongated shape and ends with a disk-like anchoring end 41, by way of which it is fixed to a base 42 which is screwed on the bracket 26.
  • the base 42 comprises a detachable portion 42a which is provided with a cylindrical seat 44.
  • the cylindrical seat 44 receives a cylindrical insert 46 made of plastic material to which the disk-like anchoring end 41 of the body 30 is coaxially screwed.
  • the detachable portion 42a is detachably coupled to a fixed portion 42b of the base 42, which is screwed on the bracket 26.
  • the fixed portion 42b supports an output yarn-guiding bush 48.
  • the compensating weft brake device 24 is provided with a first yarn-guide ring 50 mounted on the body 30, and with two rows of second yarn-guide rings 52, 54 mounted in staggered positions on the arms 32, 34 (three rings for each arm in the embodiment described herein).
  • the yarn coming from the distaff passes first through the first yarn-guide ring 50 and then, alternately, through the second yarn-guide rings 52, 54 with a zigzag path.
  • All the yarn-guide rings in the embodiment described herein are preferably made of ceramic material.
  • the arms 32, 34 react to peaks of tension by moving closer together in contrast with the elastic force of the spring 37, so as to provide the desired damping and compensating action.
  • first yarn-guide ring 50 and the second yarn-guide rings 52, 54 are retained in corresponding contoured seats 56 and 58 of the body 30 and of the articulated arms 32, 34 by way of snap-action engagement means.
  • the yarn-guide rings are typically made of a relatively rigid material, usually a ceramic material, advantageously the contoured seats 56 and 58 are made of an elastically yielding material in order to allow the snap-action coupling.
  • contoured seats 56 and 58 are defined by molding together with the body 30 and with the arms 52, 54, preferably in a plastic material.
  • first yarn-guide ring 50 With particular reference to the first yarn-guide ring 50, illustrated in detail in Figures 5 and 6 , it has an annular head 50a which is adapted to slideably receive the entering yarn, and a cylindrical fixing portion 50b that has a smaller diameter, which protrudes coaxially from the annular head 50a and has an annular groove 50c.
  • the contoured seat 56 of the body 30 has a cylindrical profile that is dimensioned to receive the cylindrical fixing portion 50b of the first yarn-guide ring 50, and is provided with four teeth 30t that protrude toward the inside in order to engage the annular groove 50c with snap-action.
  • each one of these has an annular end 52a which is adapted to slideably receive the yarn, and a plate-shaped fixing portion 52b which extends on the same plane as the annular end 52a.
  • the plate-shaped fixing portion 52b has two recesses 52c, 52d on respective opposite faces, and has a foot 52e protruding on both of the opposite sides.
  • Each one of the contoured seats 58 on the arms 32, 34 has a slot 58a with a substantially rectangular cross-section, into which the respective yarn-guide ring 52 can be inserted, and has two mutually opposing raised portions 58t1 and 58t2 which are adapted to engage the recesses 52c, 52d on the plate-shaped fixing portion 52b with snap-action and retention.
  • the foot 52e comes substantially into abutment against the bottom of a widened inlet end 58b of the slot 58a.
  • the fixing system described herein for the yarn-guide rings is simple and light, and at the same time more practical and more reliable with respect to conventional systems.
  • the invention is in fact based on the idea of using the elasticity of the material of the contoured seats that accommodate the yarn-guide rings in order to provide a snap-action fixing that is stable and precise.
  • the shape and the position of the contoured seats and of the yarn-guide rings can be modified according to requirements, while respecting the general principle of providing a snap-action coupling of the ring in the respective contoured seat.
  • the "male" element of the snap-acting engagement means is always integral with the contoured seat, and the "female” element is defined on the ring, obviously it would be possible to reverse the arrangement.
  • both the first yarn-guide ring 50 and the second yarn-guide rings 52, 54 use a snap-action fixing system according to the invention, obviously the invention could be applied only to one or some of them, while others could be fixed in a traditional manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Braking Arrangements (AREA)
EP19184501.5A 2018-07-09 2019-07-04 Compensation de dispositif de freinage de trame pour applications textiles Active EP3594386B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT202018000002973U IT201800002973U1 (it) 2018-07-09 2018-07-09 Dispositivo frena-trama comprensatore per applicazioni tessili

Publications (2)

Publication Number Publication Date
EP3594386A1 true EP3594386A1 (fr) 2020-01-15
EP3594386B1 EP3594386B1 (fr) 2021-10-13

Family

ID=68211409

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19184501.5A Active EP3594386B1 (fr) 2018-07-09 2019-07-04 Compensation de dispositif de freinage de trame pour applications textiles

Country Status (3)

Country Link
EP (1) EP3594386B1 (fr)
CN (1) CN209522976U (fr)
IT (1) IT201800002973U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112010096A (zh) * 2020-09-27 2020-12-01 西南交通建设集团股份有限公司 钢绞线的放索装置
CN113800315A (zh) * 2021-09-27 2021-12-17 大途科技(泉州)有限公司 一种全自动数据化恒张力无尾料自动换卷与放卷控制系统
CN117163766A (zh) * 2023-11-02 2023-12-05 南通永祥机电有限公司 一种电缆注塑加工用输送装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848434A (en) * 1973-03-05 1974-11-19 Control Switch Inc Yarn detector switch-lower
EP1101851A1 (fr) 1999-11-19 2001-05-23 L.G.L. Electronics S.p.A. Frein compensateur de fil de trame
CN106835456A (zh) * 2015-10-26 2017-06-13 乐清市华尊电气有限公司 用于剑杆织机上的绞边张力器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848434A (en) * 1973-03-05 1974-11-19 Control Switch Inc Yarn detector switch-lower
EP1101851A1 (fr) 1999-11-19 2001-05-23 L.G.L. Electronics S.p.A. Frein compensateur de fil de trame
CN106835456A (zh) * 2015-10-26 2017-06-13 乐清市华尊电气有限公司 用于剑杆织机上的绞边张力器

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112010096A (zh) * 2020-09-27 2020-12-01 西南交通建设集团股份有限公司 钢绞线的放索装置
CN112010096B (zh) * 2020-09-27 2022-04-12 西南交通建设集团股份有限公司 钢绞线的放索装置
CN113800315A (zh) * 2021-09-27 2021-12-17 大途科技(泉州)有限公司 一种全自动数据化恒张力无尾料自动换卷与放卷控制系统
CN117163766A (zh) * 2023-11-02 2023-12-05 南通永祥机电有限公司 一种电缆注塑加工用输送装置
CN117163766B (zh) * 2023-11-02 2023-12-26 南通永祥机电有限公司 一种电缆注塑加工用输送装置

Also Published As

Publication number Publication date
IT201800002973U1 (it) 2020-01-09
CN209522976U (zh) 2019-10-22
EP3594386B1 (fr) 2021-10-13

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