EP0199881A1 - 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 PDFInfo
- Publication number
- EP0199881A1 EP0199881A1 EP85810201A EP85810201A EP0199881A1 EP 0199881 A1 EP0199881 A1 EP 0199881A1 EP 85810201 A EP85810201 A EP 85810201A EP 85810201 A EP85810201 A EP 85810201A EP 0199881 A1 EP0199881 A1 EP 0199881A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide
- projectile
- teeth
- weft
- guide surfaces
- 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
Links
Images
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 mentioned patents refer to guiding devices for projectiles, which have eight flat surfaces on their circumference, three of which are for guiding of the projectile in the shed.
- 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 lever 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 a collision as a detail from FIG. 2 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 1 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. However, the inclinations of the surfaces 27a and 26c can, for example, also be chosen such that the angles between the surfaces 27a and 27b, 27a and 26c, 26b and 26c are all the same 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 amounts of the forces N ' 1 and N' 2 is only a factor of 1.41 greater than the amount of the force K. They are proportional to N ' 1 and N' 2 here too the frictional forces.
- 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 member 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 spacing of the guide surfaces between the guide teeth and the weft insertion member is 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 0 .
- 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)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8585810201T DE3561477D1 (en) | 1985-05-03 | 1985-05-03 | Weft insertion device for a gripper shuttle loom |
EP85810201A EP0199881B1 (fr) | 1985-05-03 | 1985-05-03 | Dispositif d'insertion de trame pour les métiers à tisser à navette à pince |
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 true EP0199881A1 (fr) | 1986-11-05 |
EP0199881B1 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) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0402285A1 (fr) * | 1989-06-09 | 1990-12-12 | S.A. Saurer Diederichs | Dispositif de support et de guidage pour organes d'insertion mécanique de la trame, dans une machine à tisser sans navette |
EP0709505A1 (fr) * | 1994-10-27 | 1996-05-01 | SOMET SOCIETA' MECCANICA TESSILE S.p.A. | Voie de guidage pour les bandes à griffes dans les métiers à tisser |
US5806570A (en) * | 1994-08-16 | 1998-09-15 | Textilma Ag | Weft band guide pin arrangement in a gripper weaving machine |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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. |
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 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
DE1801044A1 (de) * | 1967-12-08 | 1969-07-03 | Sulzer Ag | Fuehrungseinrichtung fuer das Schussfadeneintragsorgan einer Webmaschine |
Family Cites Families (4)
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 |
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 | GebràDer 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 |
-
1985
- 1985-05-03 EP EP85810201A patent/EP0199881B1/fr not_active Expired
- 1985-05-03 DE DE8585810201T patent/DE3561477D1/de not_active Expired
-
1986
- 1986-04-09 US US06/849,685 patent/US4669513A/en not_active Expired - Fee Related
- 1986-04-29 SU SU864027389A patent/SU1449017A3/ru active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
DE1801044A1 (de) * | 1967-12-08 | 1969-07-03 | Sulzer Ag | Fuehrungseinrichtung fuer das Schussfadeneintragsorgan einer Webmaschine |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0402285A1 (fr) * | 1989-06-09 | 1990-12-12 | S.A. Saurer Diederichs | Dispositif de support et de guidage pour organes d'insertion mécanique de la trame, dans une machine à tisser sans navette |
FR2648161A1 (fr) * | 1989-06-09 | 1990-12-14 | Saurer Diederichs Sa | Dispositif de support et de guidage pour organes d'insertion mecanique de la trame, dans une machine a tisser sans navette |
US5806570A (en) * | 1994-08-16 | 1998-09-15 | Textilma Ag | Weft band guide pin arrangement in a gripper weaving machine |
EP0709505A1 (fr) * | 1994-10-27 | 1996-05-01 | SOMET SOCIETA' MECCANICA TESSILE S.p.A. | Voie de guidage pour les bandes à griffes dans les métiers à tisser |
Also Published As
Publication number | Publication date |
---|---|
EP0199881B1 (fr) | 1988-01-20 |
SU1449017A3 (ru) | 1988-12-30 |
US4669513A (en) | 1987-06-02 |
DE3561477D1 (en) | 1988-02-25 |
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