EP0199881B1 - Dispositif d'insertion de trame pour les métiers à tisser à navette à pince - Google Patents

Dispositif d'insertion de trame pour les métiers à tisser à navette à pince Download PDF

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Publication number
EP0199881B1
EP0199881B1 EP85810201A EP85810201A EP0199881B1 EP 0199881 B1 EP0199881 B1 EP 0199881B1 EP 85810201 A EP85810201 A EP 85810201A EP 85810201 A EP85810201 A EP 85810201A EP 0199881 B1 EP0199881 B1 EP 0199881B1
Authority
EP
European Patent Office
Prior art keywords
guide
angle
projectile
guide surfaces
disposed
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
Application number
EP85810201A
Other languages
German (de)
English (en)
Other versions
EP0199881A1 (fr
Inventor
Otto Dr. Hintsch
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.)
Sulzer AG
Original Assignee
Gebrueder Sulzer AG
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 Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Priority to EP85810201A priority Critical patent/EP0199881B1/fr
Priority to DE8585810201T priority patent/DE3561477D1/de
Priority to US06/849,685 priority patent/US4669513A/en
Priority to SU864027389A priority patent/SU1449017A3/ru
Publication of EP0199881A1 publication Critical patent/EP0199881A1/fr
Application granted granted Critical
Publication of EP0199881B1 publication Critical patent/EP0199881B1/fr
Expired legal-status Critical Current

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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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms
    • 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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/24—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick by gripper or dummy shuttle
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/60—Construction or operation of slay

Definitions

  • the invention relates to a weft insertion device of a projectile weaving machine with guide teeth arranged one behind the other, forming a weft channel for the insertion member, through which projectiles insert weft threads into the shed.
  • the guide teeth of a known device enclose the projectile from several sides and have an opening, which faces the reed, for releasing the weft thread before the stop on the fabric edge by means of the reed.
  • the guide teeth arranged over the weaving width of a weaving machine can all be of the same design, or they each form a complementary guide unit in pairs, a guide hook being assigned to each guide support.
  • Such a guide device is described for example in CH-PS 465 521. Another guide device with all the same guide teeth is shown in DE-PS 2 628 625.
  • the known shape of the guide teeth has proven itself in practice, since no irregularities in the tissue caused by the guide teeth can be determined even with high demands on the tissue quality. Both warp and weft threads are not damaged by the known guide teeth.
  • a complex lubrication device for the weft channel which precisely doses the lubricant, is required.
  • the lubricant is usually introduced into the shot channel via the weft insertion member. Faults in the lubrication system can lead to under-lubrication and wear on the guide teeth, which becomes visible as tissue contamination.
  • the object of the invention is to create a weft insertion device of the type defined in the introduction, with which, while maintaining the positive textile properties, a lower tendency to wear in the event of inadequate lubrication is achieved by reducing the frictional forces between the projectile and the guide device.
  • This object is achieved by the invention in that two successive guide teeth each have a total of at least five planar guide surfaces facing one another, which act on the projectile via as many surfaces parallel to them during the weft insertion, two respective guide teeth assigned to one or two adjacent im Perimeter of the projectile successive guide surfaces of the teeth form an at least right angle with each other.
  • the advantage of the invention compared to known weft insertion devices is that, due to an improved shape, fewer managers occur between the weft insertion member and the guide device.
  • the frictional forces on the weft insertion member are also less. This is particularly important in the case of projectile weaving machines, since in the case of large weaving widths the drop in the speed of the projectile due to friction has a disadvantageous effect on the achievable machine speed.
  • the permanent lubricant supply in the weft channel can also be reduced, which in turn has a favorable effect on the tissue quality that can be achieved.
  • the use of a simpler and less expensive lubrication unit then also meets the requirements.
  • Fig. 1 the sley 1 of a weaving machine consisting of the reed 2, the shop profile 3 and part of a shop hoist 4 is shown.
  • the loading levers are mounted on an oscillating shaft, not shown.
  • the guide teeth 15 are fastened one behind the other at regular intervals on the shop profile 3. They form the guide device for the projectile 6, with which the weft thread 7 is inserted into the shed formed by the warp planes 8 and 9. After the weft insertion, the guide teeth emerge from the shed at the bottom right, the weft thread 7 emerging relatively to the left through the funnel-shaped opening 10 of the guide teeth. It is then struck against the fabric edge 11 in the dash-dotted position of the sley in FIG. 1.
  • FIG. 2 shows, like FIG. 1, a guide tooth 15 and the dash-dotted outline of a projectile 6 according to the prior art.
  • the guide tooth consists of the guide hook 16 with the guide surfaces 16a and 16b and the opposite guide support 17 with the guide surface 17a.
  • the guide surface 16a, 16b and 17a of a guide tooth can come into contact with the mentioned guide surfaces 16a, 16b and 17a of a guide tooth during a weft insertion.
  • FIG. 3 shows, as a detail from FIG. 2, a collision of the projectile 6 with the guide surfaces 16a and 17a during the flight through the firing channel. Since the projectile 6 does not normally fly exactly parallel to the weft channel formed from the guide teeth 15, it will move at a certain speed V perpendicular to the weft insertion direction. The direction and magnitude of the speed V change from one collision to another; they depend on various influencing factors.
  • the normal force N will be identical to the impact force K. Accordingly, the frictional force on the projectile will, in a first approximation, be smaller by a factor of 2.61 than in the example considered above.
  • FIG. 4 shows the guide tooth 25 of a device according to the invention, in which the adjacent guide surfaces enclose an angle of at least 90 °. This applies to surfaces 26a and 26b, 26c and 27a, 27b and 26a. There is an angle of 135 ° between the other adjacent guide surfaces 26b and 26c and 27a and 27b.
  • the inclinations of the surfaces 27a and 26c can, for. B. also be chosen so that the angles between the surfaces 27a and 27b, 27a and 26c, 26b and 26c are all the same size at 120 °.
  • 5 shows, analogously to FIG. 3, the force plan for the most unfavorable case of a collision between the projectile 6 and a guide tooth 25 in the preferred embodiment according to FIG. 4.
  • the vectors V for the speed and K for the reaction force are parallel to the bisector between the surfaces 27b and 26a at an angle of 45 ° to the horizontal.
  • the sum of the magnitudes of the forces N ' i and N' 2 is only a factor of 1.41 greater than the magnitude of the force K.
  • the frictional forces between the projectile and the guide device are therefore greater by a factor of 1.85 in a version according to the prior art than in a guide device according to the invention.
  • FIGS. 6 and 7 show devices according to the invention, in which instead of a guide tooth according to FIG. 4, a guide support 37 or 47 and a guide hook 36 or 46 are arranged separately one behind the other. Both elements together result in a guide tooth 35 or 45.
  • the arrangement of the guide surfaces of the individual guide elements is readily apparent from FIGS. 6 and 7 and in the perspective representations of FIGS. 10 and 11.
  • FIG. 8 and 9 show two further embodiments 55 and 65 of an entry device according to the invention. While four guide surfaces 56a, 56b, 56c, 56d for the weft insertion element 6 are arranged on the guide hook 56 in FIG. 8, the guide support 57 has only one guide surface 57a. 9 shows a similar arrangement with guide surfaces 66a to 66d, 67a for the weft insertion element 6a without vertical surfaces. It has the advantage of larger guide surfaces on the sides.
  • the distances between the guide surfaces between the guide teeth and the weft insertion member are selected such that if the weft insertion member is displaced in the weft channel without additional rotation, only one contact or at most two adjacent guide surfaces can take place at the same time, so that Angle between the currently effective adjacent guide surfaces is always at least 90 °.
  • the arrangement of the guide surfaces and the gaps between them ensures that weft and warp threads are not damaged when the guide device is inserted and removed from the shed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (6)

1. Dispositif d'insertion des fils de trame d'un métier à tisser à projectiles, présentant des dents de guidage qui sont disposées les unes derrière les autres et forment, pour l'organe d'insertion, un canal de propulsion par lequel des projectiles insèrent des fils de trame dans la foule, caractérisé par le fait que deux dents de guidage respectivement successives (26, 27, 36, 37, 46, 47, 56, 57, 66, 67) comportent, en tout, au moins cinq surfaces planes de guidage (par exemple 26a, 26b, 26c, 27a, 27b) qui sont tournées les unes vers les autres et agissent sur le projectile (6, 6a) par l'intermédiaire de surfaces de nombre correspondant de ce projectile qui leur sont parallèles lors de l'insertion de la trame, deux surfaces de guidage considérées des dents, qui se succèdent sur la circonférence du projectile et sont respectivement associées à une ou à deux dents de guidage voisines, formant entre elles un angle au moins droit.
2. Dispositif selon la revendication 1, caractérisé par le fait que deux surfaces de guidage successives (27a, 26c, 56b, 56c), formant entre elles au moins un angle droit, se trouvent envis-à-vis d'une autre surface de guidage (26a, 57a) qui est perpendiculaire au plan de la bissectrice entre les premières surfaces, cette surface étant flanquée, de part et d'autre, de deux autres surfaces de guidage (26b, 27b, 56a, 56d) qui sont parallèles au plan de la bissectrice et succèdent aux premières surfaces sur la circonférence du projectile.
3. Dispositif selon les revendications 1 et 2, caractérisé par le fait que les surfaces de guidage voisines (27a, 26c) ne formant pas entre elles un angle droit sont inclinées, l'une par rapport à l'autre, de préférence d'un angle de 120 à 135°.
4. Dispositif (65, 6a) selon la revendication 1, caractérisé par le fait que deux surfaces de guidage (67a, 66d) formant entre elles un angle droit se trouvent en vis-à-vis d'une autre surface de guidage (66b) disposée perpendiculairement au plan de la bissectrice entre les premières surfaces ; et par le fait que cette surface (66b) est flanquée, de part et d'autre, d'une autre surface respective de guidage (66a, 66c) qui, à son tour, succède aux premières surfaces (67a, 66d) sur la circonférence du projectile, et forme avec ces dernières un angle droit.
5. Dispositif selon la revendication 1, caractérisé par le fait que les surfaces de guidage sont disposées, sur les dents de guidage, de manière telle que, lorsque la direction de propulsion du projectile s'écarte d'une trajectoire parallèle au canal de propulsion, sans rotation autour de l'axe longitudinal, au maximum deux surfaces de guidage respectivement voisines (par exemple 26a et 26b, 26b et 26c) des dents de guidage puissent venir simultanément au contact du projectile.
6. Dispositif selon la revendication 1, caractérisé par le fait que les deux surfaces de guidage (par exemple 26a, 27b) des dents de guidage, qui sont les plus proches de l'ouverture (10) de sortie du fil de trame hors du canal de propulsion, forment mutuellement un angle droit.
EP85810201A 1985-05-03 1985-05-03 Dispositif d'insertion de trame pour les métiers à tisser à navette à pince Expired EP0199881B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP85810201A EP0199881B1 (fr) 1985-05-03 1985-05-03 Dispositif d'insertion de trame pour les métiers à tisser à navette à pince
DE8585810201T DE3561477D1 (en) 1985-05-03 1985-05-03 Weft insertion device for a gripper shuttle loom
US06/849,685 US4669513A (en) 1985-05-03 1986-04-09 Guide for a picking element in a weaving machine
SU864027389A SU1449017A3 (ru) 1985-05-03 1986-04-29 Приспособление дл прокладывани уточной нити на ткацком станке с малогабаритными прокладчиками

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85810201A EP0199881B1 (fr) 1985-05-03 1985-05-03 Dispositif d'insertion de trame pour les métiers à tisser à navette à pince

Publications (2)

Publication Number Publication Date
EP0199881A1 EP0199881A1 (fr) 1986-11-05
EP0199881B1 true EP0199881B1 (fr) 1988-01-20

Family

ID=8194642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85810201A Expired EP0199881B1 (fr) 1985-05-03 1985-05-03 Dispositif d'insertion de trame pour les métiers à tisser à navette à pince

Country Status (4)

Country Link
US (1) US4669513A (fr)
EP (1) EP0199881B1 (fr)
DE (1) DE3561477D1 (fr)
SU (1) SU1449017A3 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2648161B1 (fr) * 1989-06-09 1991-10-04 Saurer Diederichs Sa Dispositif de support et de guidage pour organes d'insertion mecanique de la trame, dans une machine a tisser sans navette
BE1004305A3 (nl) * 1989-07-06 1992-10-27 Picanol Nv Grijperweefmachine met lansgeleiding.
US5176185A (en) * 1990-07-24 1993-01-05 Sulzer Brothers Limited Guide teeth for a rapier picking tape
BE1007003A3 (nl) * 1993-04-15 1995-02-14 Picanol Nv Weefmachine voorzien van een lans en geleidingsmiddelen.
DE9413172U1 (de) * 1994-08-16 1994-10-13 Textilma Ag, Hergiswil Greiferwebmaschine
IT1270681B (it) * 1994-10-27 1997-05-07 Somet Soc Mec Tessile Pista guidanastri per telai di tessitura a pinze
US7092985B2 (en) * 2000-03-30 2006-08-15 United Devices, Inc. Method of managing workloads and associated distributed processing system
CN103334205A (zh) * 2013-07-05 2013-10-02 王勇 一种剑带导钩

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2039454A (en) * 1932-06-02 1936-05-05 Firm Tefag Textil Finanz A G Weaving of fabrics
CH439159A (de) * 1965-06-23 1967-06-30 Sulzer Ag Führungszahn zur Führung des Schützens einer Greiferschützenwebmaschine
FR1480026A (fr) * 1966-05-17 1967-05-05 Sulzer Ag Dent de guidage de la navette d'un métier à tisser à navette à pince
CH465521A (de) * 1967-12-08 1968-11-15 Sulzer Ag Führungseinrichtung für das Schussfadeneintragsorgan einer Webmaschine
US3556163A (en) * 1968-12-06 1971-01-19 Sulzer Ag Guide for weft-picking means in a loom
EP0165326B1 (fr) * 1984-06-19 1988-08-24 GebràœDer Sulzer Aktiengesellschaft Dispositif de guidage pour l'inséreur de trame d'un métier à tisser, plus particulièrement d'un métier à tisser à navette à pince

Also Published As

Publication number Publication date
DE3561477D1 (en) 1988-02-25
EP0199881A1 (fr) 1986-11-05
SU1449017A3 (ru) 1988-12-30
US4669513A (en) 1987-06-02

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