EP3374550B1 - A weaving loom comprising a system for quickly coupling heald frames to the respective actuating tie rods - Google Patents

A weaving loom comprising a system for quickly coupling heald frames to the respective actuating tie rods Download PDF

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Publication number
EP3374550B1
EP3374550B1 EP16831513.3A EP16831513A EP3374550B1 EP 3374550 B1 EP3374550 B1 EP 3374550B1 EP 16831513 A EP16831513 A EP 16831513A EP 3374550 B1 EP3374550 B1 EP 3374550B1
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EP
European Patent Office
Prior art keywords
tie rods
coupling
loom
heald frame
heald
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Application number
EP16831513.3A
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German (de)
English (en)
French (fr)
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EP3374550A1 (en
Inventor
Pierangelo PELIZZARI
Francesco Alghisi
Fabio Rabolini
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Itema SpA
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Itema SpA
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Publication of EP3374550A1 publication Critical patent/EP3374550A1/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C9/00—Healds; Heald frames
    • D03C9/06—Heald frames
    • D03C9/0683—Arrangements or means for the linking to the drive system

Definitions

  • the present invention relates to a weaving loom comprising a system for quickly coupling heald frames.
  • the invention relates to a coupling system - in looms in which the tie rods coupling is carried out in the horizontal direction, i.e. laterally to the respective connections on the heald frames - which allows even a single operator to quickly and simultaneously couple all the heald frames installed each time on a loom to the respective actuating tie rods.
  • heald frames are the devices responsible for the movement of groups of warp threads, so as to form the shed.
  • the heald frames are in number of two and the warp yarns are alternately hooked to one and the other of said frames.
  • more heald frames are used even reaching the number of, for example, 24 frames, each one of them operating on a smaller number of warp threads, in order to realize more complex patterns by using warp and weft yarns of different quality or colour.
  • the heald frames slide inside special side guides, in a perpendicular direction in respect to the plane wherein the fabric is formed, from an upper position to a lower position with reference to said plane, and are driven in this movement by actuating tie rods coupled to each heald frame.
  • the movement is imparted to said tie rods, in a per se known manner, by a shedding machine, to form a desired and predetermined fabric pattern.
  • actuating tie rods can be divided into two main categories depending on the insertion direction into the respective connections on the heald frames.
  • this insertion direction is substantially vertical, i.e. the tie rods are placed along the heald frame insertion path and, when positioned under the frame, they constitute the support thereof when the heald frames are inserted into the loom, even before the mutual coupling device between the actuating tie rods and the respective connections on the heald frames is operated.
  • This allows the assembling of the heald frames on the loom to be performed by a single operator, who first places the heald frames on the tie rods and, subsequently, activates the individual coupling devices.
  • this first category of actuating tie rods are disclosed in patents US-5518040 , US-5483995 and US-5810055 .
  • the insertion direction is substantially horizontal, i.e. the actuating tie rods are arranged in waiting position at the side of the heald frame insertion path and they are coupled to the respective connections on the heald frames following a substantially horizontal insertion direction. Due to this reason, while the actuating tie rods are in said waiting position, they cannot constitute a support for the heald frames while these latter are inserted in the loom. Consequently, in this type of looms, the installation of the heald frames in the loom needs to be performed by two operators: a first operator keeping each heald frame duly positioned and balanced and a second operator laterally coupling the actuating tie rods to the respective connections on the heald frames.
  • An example of this second category of actuating tie rods is disclosed in the patent EP-1322804 by Stäubli . The present invention pertains to this second category of actuating tie rods.
  • the actuating tie rods disclosed in patent EP-1322804 have been particularly appreciated by the market because they are provided with particularly effective semi-automatic coupling devices which allow, with a simple and therefore low-cost construction, a quick and safe installation of heald frames in the loom.
  • These semi-automatic coupling devices comprise, in addition to the hook itself, a locking pawl pivoted on the hook and pushed into the locked position by respective spring means arranged inside the hook.
  • Such tilting locking pawl is also provided with an engagement surface apt to cause the rotation of the pawl itself towards the opening position when the coupling device is pushed in position on the corresponding connection on the heald frame. This allows to couple in a single movement the actuating tie rods to the heald frames, while the click of the locking pawl indicates with certainty the achievement of the correct coupling position.
  • a first object of the present invention is therefore to provide a quick coupling system which allows to simultaneously couple a plurality of heald frames to the respective actuating tie rods, regardless of the number of frames, and thereby after having already placed all the heald frames in their standard working position.
  • a second object of the present invention which is strictly connected and functional to the above mentioned first object, is then to allow the heald frame coupling and uncoupling operations to be entirely accomplished by a single operator, thus eliminating the need of the simultaneous presence of two operators on the same loom for performing these operations.
  • a last object of the present invention is also that this coupling system allows to speed up the heald frame uncoupling and removing operations, from the respective actuating tie rods, at the end of the weaving process.
  • weaving loom comprising a system for quickly coupling heald frames to respective actuating tie rods wherein said tie rods are arranged in groups of adjacent tie rods which operate, by lateral coupling, on a same connection area of the heald frames and wherein each one of said tie rods is provided with a semi-automatic push-coupling device apt to be push-coupled to a respective heald frame connection, characterized in that it comprises a single multiple lever support, apt to house in a pre-coupling position all the active tie rods of each one of said groups of tie rods, in which pre-coupling position the coupling device of each active tie rod is laterally aligned to the respective heald frame connection and is adjacent to the vertical insertion path of said heald frame with a predetermined clearance, in that said multiple lever support is apt to move said active tie rods between said pre-coupling position and a coupling position wherein the coupling devices of all the active actuating tie rods are engaged with the respective heald frame connections and in
  • the invention has been developed after the successful conclusion of these studies, with the further object of coordinating the functionality of said multiple lever support of the active tie rods, i.e. those which are each actually intended to drive the reciprocating movement of a heald frame, with that of the already known support bracket of the inactive tie rods (see Fig. 2 , refs. 4 and 1r), i.e. those tie rods which do not actually drive any heald frame, when operating with an incomplete heald frame pack.
  • yet another object of said studies was to identify a multiple lever support position which could be easily accessible to the operator for its operation and at the same time did not hinder the smooth functioning of the moving parts and textile operations on the loom.
  • Fig. 1 illustrates in a very schematic way, with many parts removed for greater clarity, the inner face of the side S of a weaving loom.
  • a pair of guides G for the alternate sliding of the heald frames H in the vertical direction is fixed.
  • the heald frames H range from a minimum of 2 up to a variable maximum number according to the specific loom, and are placed side by side shortly spaced from each other.
  • Fig. 1 is represented only one heald frame H, for simplicity of illustration, , and precisely the one closest to the usual operator access position to the loom.
  • the alternate movement in the vertical plane is imparted to the heald frames H by a shedding machine, of which for better clearness in the drawing, is represented only one terminal lever L and the related actuating tie rod 1 of a heald frame H (such tie rod is sometimes indicated in the following also with references 1a and 1r, just in order to identify some different working positions of the same).
  • the levers L and the related tie rods 1 are in the same number of the maximum number of heald frames which can be installed on the loom, and therefore they form a compact group of several adjacent and parallel tie rods 1.
  • the illustrated structure refers to the left side of the loom; obviously, a similar structure is provided on the right side of the loom, where a second group of adjacent and parallel tie rods 1 will thus be located.
  • one or more additional groups of rods 1 are usually also provided, which are coupled to the heald frames at an intermediate position (and of course also the respective shedding machine command levers), so as to avoid warping or deformation of the heald frames caused by the high stresses these heald frames are subjected throughout the weaving.
  • Tie rods 1 terminate at their top with a hook 2 ( Fig. 3A ) suitable for laterally coupling with a corresponding connection 3 provided at the lower part of the heald frame, for transmitting the movement to the latter.
  • a hook 2 Fig. 3A
  • FIG. 3A a widely used in commerce type of hooks is illustrated which, thanks to the presence of a rotating pawl 2n, which is pivoted on an appendix of the hook 2, are automatically locked when snapping in position with a click, by a simple pushing operation that makes the hook 2 to couple with the respective connection 3.
  • the sliding surface 2s of the pawl 2n slides on a corresponding surface of the connection 3 on the heald frame causing the pawl 2n to rotate to a completely opened position, against spring means provided therein.
  • the connection 3 releases the sliding surface 2s and said spring means trigger the pawl 2n into the connection locking position.
  • the main feature of the quick coupling system of the present invention consists in the presence of one multiple lever support 5 for each group of adjacent tie rods, by means of which it is possible to operate the simultaneous coupling of all active rods 1a of said group to the respective connections 3 on the heald frames.
  • Such multiple lever support 5 is hinged on said bracket 4 which supports, in a per se known manner, the inactive actuating tie rods 1r, i.e. those tie rods which are not connected to a respective heald frame.
  • the bracket 4 which has a generally rectangular shape protruding from the loom side S and being anchored on the same, bears a resting rack 7 ( Fig.1 ), at the side parallel to said side S, for stably housing the inactive tie rods 1r ( Fig.
  • the multiple lever support 5 is preferably formed by a rectangular structure hinged to the bracket 4 along a rotation axis 8 parallel to the side S, and the two sides of this structure which are perpendicular to the axis 8 preferably have an upward-curved shape at their ends towards the loom side S., On said ends an active rack 6 is fixed for stably housing the active tie rods 1a ( Fig. 2 ) in the coupling preparatory position, or pre-coupling position, to the respective connections 3 ( Fig. 2A ) on the heald frames.
  • the shape of the multiple lever support 5 described above, as well as the way of pivoting it on the bracket 4 or on another equivalent tie rods 1r support, although presently preferred, are not to be considered as limitative.
  • Other shapes and arrangements of the multiple lever support 5 may in fact be possible and useful, depending on the specific configuration of the loom on which the system is installed, being only necessary that the lever support 5 could drive, by a single rotational or also translational movement, the shift of the entire group of active tie rods (1a) between the different positions better described in the following.
  • the multiple lever support 5 can assume in fact two stable positions with respect to the bracket 4 - a pre-coupling position (illustrated in Fig. 2 ) and a rest position (illustrated in Fig. 4 ) - defined by the engagement of a spring pin 9 into the holes 10a and 10r, formed on a side of the bracket 4, and visible in Fig. 5 - or by any other positioning or fixing element suitable to this purpose and per se known - and a temporary coupling position (illustrated in Fig. 3 and in Fig. 3A ) which is reached temporarily by pushing down the handle 5g ( Fig. 1 ) of the multiple lever support 5.
  • a pre-coupling position illustrated in Fig. 2
  • a rest position illustrated in Fig. 4
  • a temporary coupling position illustrated in Fig. 3 and in Fig. 3A
  • the active rack 6 provided on the opposite end of the same pushes the hooks 2a of all the tie rods 1a from the pre-coupling position (1a, 2a) to the effective coupling position (1, 2) on the corresponding heald frame connections 3.
  • the handle 5g can preferably be itself one side of the structure that makes up the multiple lever support 5.
  • the tie rods 1 can be positioned on the active rack 6 of the multiple lever support 5 (position indicated as 1a) or on the resting rack 7 of the bracket 4 (indicated as position 1r), depending on whether they have to be active and then actually attached to a heald frame or stay inactive during the subsequent weaving process.
  • the heald frames H when the heald frames H are inserted in place, they will lean with their connections 3 directly on the sliding surface 2s of the pawls 2n of the tie rods 1a, in a stable equilibrium position, and furthermore arranging themselves perfectly aligned to the correct pre-coupling position. Thanks to this arrangement of the multiple lever support 5 the sliding surface 2s of pawls 2n therefore forms a stable support surface for the heald frames H while installing on the loom a group of heald frames.
  • tie rods 1 which do not have to be used for the coupling of a heald frame are conversely rotated until they find a correct positioning on the resting rack 7, assuming the rest position 1r, 2r, which is highly stable due to its inclination, and out of every potential interference with the working heald frames.
  • the multiple lever support 5 is rotated into the coupling position ( Fig. 3 and Fig.
  • the heald frame quick coupling system of the present invention has fully achieved the desired objects, allowing to perform in a rational manner the operation of coupling the tie rods 1 of a shedding machine to the heald frames H, firstly by inserting in the correct position all the heald frames necessary for the specific weaving process, which receive a stable support from the surface of the actuating tie rods themselves in their pre-coupling position and then by coupling, with a single move of the multiple lever supports 5, all said heald frames to the respective actuating tie rods in a single operation. Thanks to the system described above, it is therefore possible that a single operator accomplishes the whole heald frame H coupling operation, thus achieving the first two objects of the invention.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP16831513.3A 2015-11-10 2016-11-10 A weaving loom comprising a system for quickly coupling heald frames to the respective actuating tie rods Active EP3374550B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUB2015A005435A ITUB20155435A1 (it) 2015-11-10 2015-11-10 Sistema di aggancio rapido dei quadri-licci in un telaio di tessitura
PCT/IB2016/056772 WO2017081636A1 (en) 2015-11-10 2016-11-10 System for quickly coupling heald frames to the respective actuating tie rods in a weaving loom

Publications (2)

Publication Number Publication Date
EP3374550A1 EP3374550A1 (en) 2018-09-19
EP3374550B1 true EP3374550B1 (en) 2023-03-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16831513.3A Active EP3374550B1 (en) 2015-11-10 2016-11-10 A weaving loom comprising a system for quickly coupling heald frames to the respective actuating tie rods

Country Status (5)

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EP (1) EP3374550B1 (ja)
JP (1) JP6899775B2 (ja)
CN (1) CN107407015B (ja)
IT (1) ITUB20155435A1 (ja)
WO (1) WO2017081636A1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900008379A1 (it) * 2019-06-07 2020-12-07 Itema Spa Traversa di quadro-liccio per telai di tessitura a rigidita' migliorata
IT201900009114A1 (it) * 2019-06-17 2020-12-17 Itema Spa Quadro-liccio per telai di tessitura comprendente un dispositivo di frenatura del movimento per inerzia delle maglie nelle fasi di inversione di moto del quadro-liccio

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3541042C1 (de) * 1985-11-19 1987-01-29 Grob & Co Ag Vorrichtung zum Kuppeln eines Webschaftes mit einem Antriebsorgan
EP0654552A1 (de) * 1993-11-24 1995-05-24 Sulzer RàœTi Ag Vorrichtung zum An- und Abkuppeln von Webschäften und Webmaschine mit einer solchen Vorrichtung
DE4343882C1 (de) * 1993-12-22 1995-01-19 Dornier Gmbh Lindauer Webschaftkupplung und Vorrichtung zum simultanen Öffnen und Schließen einer Vielzahl von Webschaftkupplungen in einer Webmaschine
DE19548848C1 (de) * 1995-12-27 1996-09-12 Dornier Gmbh Lindauer Webschaftkupplung mit einer Entkupplungsvorrichtung
DE102004006389B4 (de) * 2004-02-10 2007-05-31 Groz-Beckert Kg Fachbildeeinrichtung für eine Webmaschine
EP2009157B1 (de) * 2007-06-26 2010-01-06 Groz-Beckert KG Schaftanschlusseinrichtung für einen Webschaft

Also Published As

Publication number Publication date
CN107407015B (zh) 2019-04-30
JP6899775B2 (ja) 2021-07-07
EP3374550A1 (en) 2018-09-19
ITUB20155435A1 (it) 2016-02-10
CN107407015A (zh) 2017-11-28
WO2017081636A1 (en) 2017-05-18
JP2018536772A (ja) 2018-12-13

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