EP1624096B1 - Device for weaving the trimmings of a fabric produced by means of shuttleless weaving machines - Google Patents

Device for weaving the trimmings of a fabric produced by means of shuttleless weaving machines Download PDF

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Publication number
EP1624096B1
EP1624096B1 EP20050107086 EP05107086A EP1624096B1 EP 1624096 B1 EP1624096 B1 EP 1624096B1 EP 20050107086 EP20050107086 EP 20050107086 EP 05107086 A EP05107086 A EP 05107086A EP 1624096 B1 EP1624096 B1 EP 1624096B1
Authority
EP
European Patent Office
Prior art keywords
weaving
threads
trimmings
satellites
yarn
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
EP20050107086
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1624096A2 (en
EP1624096A3 (en
Inventor
Roberto Capitanio
Marco Novella
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.)
Smit SpA
Original Assignee
Smit SpA
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 Smit SpA filed Critical Smit SpA
Publication of EP1624096A2 publication Critical patent/EP1624096A2/en
Publication of EP1624096A3 publication Critical patent/EP1624096A3/en
Application granted granted Critical
Publication of EP1624096B1 publication Critical patent/EP1624096B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C7/00—Leno or similar shedding mechanisms
    • D03C7/08—Devices for twisting warp threads repeatedly in the same direction

Definitions

  • the present invention relates to a device for weaving the trimmings of a fabric produced by means of shuttleless weaving machines.
  • the weaving of the side trimmings of a fabric must be effected by interlacing the warp and weft threads so as to prevent the side warp threads from becoming unthreaded from the weft threads.
  • slotted leno heald consists in controlling the position of a pair of threads to form a so-called "warp mouth", similar to that of the other warp threads, by inverting the reciprocal position for each, or more, weft insertion(s).
  • a first type of traditional device uses, in particular, a disk with two holes through which the weaving threads pass, wherein the disk is placed parallel to the threads in order to effect the weaving.
  • This device however, has the drawback of vertical encumbrance, which prevents the device itself from being housed inside the doup-heald frame, thus limiting the maximum number of installable frames.
  • a further disadvantage lies in the fact that as the disk holes run in a circular path, they scrape the weaving threads with the consequent risk of damage due to wear.
  • rotating splitz The most commonly used devices for weaving the trimmings of a fabric are called "rotating splitz" and are based on an epicycloid gearing having the reserves of the two weaving threads installed on board.
  • US-A-5 392 819 discloses a device for weaving the trimmings of a fabric produced by weaving machines according to the preamble of claim 1.
  • An objective of the present invention is to overcome the above drawbacks and, in particular, to provide a device for weaving the trimmings of a fabric produced by weaving machines, which reduces the overall encumbrance of the system, regardless of the dimensions of the yarn packs used, which are situated outside the device itself.
  • Another objective of the invention is to provide a device for weaving the trimmings of a fabric produced by weaving machines, which allows the efficient control of the thread opening, so as to obtain the same opening angle of the upper and lower thread, thus nullify-ing/minimizing the sliding between the threads in the feeding tract between the yarn packs and the device itself.
  • a further objective of the invention is to provide a device for weaving the trimmings of a fabric produced by weaving machines, which allows the percentage elongation of the threads in the shed opening to be reduced.
  • An additional objective of the invention is to provide a device for weaving the trimmings of a fabric in a simple, fast, precise, economical and reliable way.
  • the present invention retains the technical properties of the epicycloid gearings ("rotating splitz") of the known type, it overcomes encumbrance problems and, with respect to all the traditional systems, reduces the percentage elongation of the threads, in the shed opening.
  • 1 generically indicates a device with an epicycloid gearing of the known type, comprising, inside a shaped support 10, a circular plate 11, made to rotate by known means, along the direction of the arrow F in figure 1 , so as to distribute the rotatory movement to two satellites 13, each of which is connected to the relative weaving thread 4, 4A.
  • the yarns 4, 4A are guided into the device 1 through the duct 14 of the supporting element 15 and from there to the centre of the plate 11, inside the shaped hole 16.
  • the weaving threads 4, 4A are then split and passed through the central openings 17, 18 ( fig. 1 ) of the satellites 13 and subsequently deviated inside the eyelets 8, in turn assembled on suitable brackets 19, 20, until they converge in correspondence with the path 21, which represents the weaving points 22 of the selvedge 23 of the fabric produced, the latter generically marked with 24.
  • Both the eyelets 8 are positioned eccentrically with respect to the relevant axis 6 ( fig. 3 ) of each satellite 13, so that the above eyelets 8 follow elliptical paths.
  • the spools, marked with 2 in figure 1 , of the weaving threads 4 and 4A are positioned on an external support 9, rotating along the direction of the arrow G of figure 1 , and the threads 4 and 4A enter the epicycloid device 1, first at the center of the plate 11, near the revolution axis 5 of the satellites 13, and then to the centre of the respective satellites 13, close to the relative rotation axes 6.
  • the device can operate according to two different modes, with the support 9 in synchronous rotation with the rotating plate 11, when the latter rotates in a single direction, in order to avoid an accumulation of the intertwining of the threads 4, 4A with each other, in the tract between the interception 3 and the device 1, or with the support 9 fixed, when the rotating plate 11 is rotated alternately for a certain number of rounds in the two opposite directions, maintaining the intertwining of the weaving threads 4, 4A in the tract existing between the interception 3 and the device 1, on an average null.
  • the reduction in the elongation of the threads 4, 4A is due to the fact that the "splitz" with epicycloid gearings, such as that used in the present invention, does not also form a shed at the thread feeding side and distributes the elongation caused by the anterior warp shed (in correspondence with the formation side of the fabric 24) on a thread length extended to the packs 2 of yarn.
  • the device described is capable of maintaining the opening angles of the yarn, marked by ⁇ and ⁇ in figure 1 , almost equal in all phases, by optimising the opening of the weaving threads 4, 4A and minimizing the respective sliding of the threads 4, 4A in the feeding zone, particularly in the operating mode with a fixed support 9 of the yarn packs 2.
  • the use of the device according to the invention causes a trend of the thread opening angle in the upper part (angle ⁇ ) and in the lower part (angle ⁇ ) which practically follows a sinusoidal law, if a constant rotation rate of the rotating plate 11 is established.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP20050107086 2004-08-05 2005-08-01 Device for weaving the trimmings of a fabric produced by means of shuttleless weaving machines Expired - Lifetime EP1624096B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITVI20040196 ITVI20040196A1 (it) 2004-08-05 2004-08-05 Dispositivo per la formazione della legatura dei bordi di un tessuto prodotto con macchine per tessere senza navetta

Publications (3)

Publication Number Publication Date
EP1624096A2 EP1624096A2 (en) 2006-02-08
EP1624096A3 EP1624096A3 (en) 2007-07-04
EP1624096B1 true EP1624096B1 (en) 2010-02-17

Family

ID=35328843

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050107086 Expired - Lifetime EP1624096B1 (en) 2004-08-05 2005-08-01 Device for weaving the trimmings of a fabric produced by means of shuttleless weaving machines

Country Status (5)

Country Link
EP (1) EP1624096B1 (enExample)
JP (1) JP2006045762A (enExample)
CN (1) CN1754997A (enExample)
DE (1) DE602005019352D1 (enExample)
IT (1) ITVI20040196A1 (enExample)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007002385A (ja) * 2005-05-25 2007-01-11 Tsudakoma Corp 織機の耳組装置
JP5184241B2 (ja) * 2008-07-25 2013-04-17 津田駒工業株式会社 織機における遊星歯車式耳組装置
CN109723763B (zh) * 2019-03-05 2021-11-23 杨新华 一种可变曲柄行程开口装置
EP3896201B1 (en) * 2020-04-14 2023-06-07 Picanol Device for forming a leno weave in a weaving machine
CN111286839B (zh) * 2020-04-16 2024-07-26 山东玉马遮阳科技股份有限公司 一种垂直柔纱窗帘布的织造方法
CN113913989A (zh) * 2021-11-16 2022-01-11 山东玉马遮阳科技股份有限公司 一种控光窗帘及其制备方法
CN114717740B (zh) * 2022-03-15 2023-12-08 云路复合材料(上海)有限公司 磁力变轨编织机构

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7009073A (enExample) * 1970-06-19 1971-12-21
JPS5926544A (ja) * 1982-08-04 1984-02-10 日産自動車株式会社 織機のねじり耳織成装置
US5392819A (en) * 1993-12-10 1995-02-28 Hunshin Enterprise Co., Ltd. Planetary gear type selvage forming and cord catching device for loom
JP3994559B2 (ja) * 1998-12-10 2007-10-24 株式会社豊田自動織機 織機における耳形成装置
US6546966B2 (en) * 2001-03-27 2003-04-15 Sulzer Textil Ag Apparatus for making available a leno thread for a weaving machine

Also Published As

Publication number Publication date
DE602005019352D1 (de) 2010-04-01
CN1754997A (zh) 2006-04-05
JP2006045762A (ja) 2006-02-16
EP1624096A2 (en) 2006-02-08
EP1624096A3 (en) 2007-07-04
ITVI20040196A1 (it) 2004-11-05

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