EP0222049A1 - Métier à tisser - Google Patents

Métier à tisser Download PDF

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Publication number
EP0222049A1
EP0222049A1 EP85810536A EP85810536A EP0222049A1 EP 0222049 A1 EP0222049 A1 EP 0222049A1 EP 85810536 A EP85810536 A EP 85810536A EP 85810536 A EP85810536 A EP 85810536A EP 0222049 A1 EP0222049 A1 EP 0222049A1
Authority
EP
European Patent Office
Prior art keywords
projectile
return
push
pushback
speed
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
EP85810536A
Other languages
German (de)
English (en)
Other versions
EP0222049B1 (fr
Inventor
Robert Horvath
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
Sulzer AG
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 Sulzer AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Priority to EP19850810536 priority Critical patent/EP0222049B1/fr
Priority to DE8585810536T priority patent/DE3563638D1/de
Priority to JP26949686A priority patent/JPS62117855A/ja
Publication of EP0222049A1 publication Critical patent/EP0222049A1/fr
Application granted granted Critical
Publication of EP0222049B1 publication Critical patent/EP0222049B1/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
    • D03D47/12—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

Definitions

  • the invention relates to a device for pushing back the projectile of a projectile weaving machine after the weft insertion and after braking the projectile in the catch mechanism.
  • the projectile When pushing back, the projectile is brought into a position in which it is separated from the inserted weft thread and then pushed out of the catch mechanism by means of an ejector.
  • the projectile Due to changes in the lubrication status of the projectile or due to changed operating conditions, for example due to a longer machine standstill and cooling of the catching gear, the projectile can penetrate more or less deeply into the catching gear when braking. If the projectile comes to a standstill after braking too quickly at too great a distance from the pushback head, the pushback hits the projectile head at a relatively high speed on. In this case, the impact stress in the contact zone between the projectile head and the push-back head can become so great that its material strength is fully exhausted. An increase in speed of the weaving machine, which led to an even higher push-back speed, is therefore not possible.
  • the invention solves this problem in that the drive of the return slide is designed such that the return slide is accelerated slowly and more quickly decelerated during the return movement, such that the acceleration time accounts for at least 60% of the total movement time from one dead center to the other.
  • Fig. 1 the projectile can be seen in its standstill position after braking in the catch brake 80.
  • the catch brake 80 here indicated schematically only by dashed lines, has the task of braking the projectile after entering the catch mechanism 70 within a weaving path that is as constant as possible, with a safety distance Y between the projectile head 11 and the push-back head 21 being maintained.
  • the return pusher head 21 forms the part of the return pusher 20 facing the projectile 1, which is driven by the cam drum 50 via the return pusher tab 40 and the return pusher lever 30. While the cam drum 50 is continuously driven by the main drive of the weaving machine, the push-back lever 30 executes a discontinuous pivoting movement according to arrow 32 during the push-back process.
  • the return pusher 20 slides back and forth horizontally around the dimension X between the guides 22 and 23 and pushes the projectile 1 back into the position indicated by dash-dotted lines, in which it is pushed out of the catch mechanism 70 by the ejector 60.
  • Fig. 2 are above the angle of rotation of the main drive of the loom, the return slide path and the return slide speed according to the prior art with dashed lines and according to the invention with solid lines Lines shown.
  • the amount of the return slide speed is shown, so that the return stroke of the return slide stroke results in up to approximately 350 °.
  • the properties of the return slide drive according to the invention can be seen particularly well in relation to those of a return slide according to the prior art in the speed diagram in FIG. 2 below.
  • the reversal point of the push back has been moved from approx. 353 ° to 358 ° for a push back according to the invention.
  • the total movement time of a back slide according to the invention measured on the angle of rotation of the weaving machine, extends over 65 ° compared to 55 ° for a back slide according to the prior art.
  • the reversal point of the back slide has been moved from approx. 330 ° to approx.
  • the acceleration time during which the push-back speed increases is at least 60% of the total movement time during a push-back stroke.
  • the catching brake of a projectile weaving machine is generally set so that the minimum distance between the projectile 1 and the push-back head 21 is not less than 10 mm. It can be seen from the path diagram of the return pusher in the upper part of FIG. 2 that in a drive of the return pusher designed according to the invention, the contact between the return pusher head and the projectile takes place from approximately 320 °. In the lower part of FIG. 2, it can be seen from the speed diagram of the pushback device that from the earliest point of contact between the pushback head and the projectile, which is possible after covering a distance of 10 mm of the pushback device, there are already considerable speed differences between a drive according to the prior art and occur a drive according to the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP19850810536 1985-11-13 1985-11-13 Métier à tisser Expired EP0222049B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP19850810536 EP0222049B1 (fr) 1985-11-13 1985-11-13 Métier à tisser
DE8585810536T DE3563638D1 (en) 1985-11-13 1985-11-13 Loom
JP26949686A JPS62117855A (ja) 1985-11-13 1986-11-12 織機のひ戻し装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19850810536 EP0222049B1 (fr) 1985-11-13 1985-11-13 Métier à tisser

Publications (2)

Publication Number Publication Date
EP0222049A1 true EP0222049A1 (fr) 1987-05-20
EP0222049B1 EP0222049B1 (fr) 1988-07-06

Family

ID=8194659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850810536 Expired EP0222049B1 (fr) 1985-11-13 1985-11-13 Métier à tisser

Country Status (3)

Country Link
EP (1) EP0222049B1 (fr)
JP (1) JPS62117855A (fr)
DE (1) DE3563638D1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1244076B (de) * 1961-06-14 1967-07-06 Sulzer Ag Webmaschine mit Greiferschuetzen
FR2393094A1 (fr) * 1977-06-01 1978-12-29 Sulzer Ag Dispositif recepteur de l'organe d'insertion de la trame d'une machine a tisser
DE3222393A1 (de) * 1982-05-07 1983-11-17 Gebrüder Sulzer AG, 8401 Winterthur Verfahren zum betrieb des fangwerkes von greiferprojektil-webmaschinen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1244076B (de) * 1961-06-14 1967-07-06 Sulzer Ag Webmaschine mit Greiferschuetzen
FR2393094A1 (fr) * 1977-06-01 1978-12-29 Sulzer Ag Dispositif recepteur de l'organe d'insertion de la trame d'une machine a tisser
DE3222393A1 (de) * 1982-05-07 1983-11-17 Gebrüder Sulzer AG, 8401 Winterthur Verfahren zum betrieb des fangwerkes von greiferprojektil-webmaschinen

Also Published As

Publication number Publication date
EP0222049B1 (fr) 1988-07-06
DE3563638D1 (en) 1988-08-11
JPS62117855A (ja) 1987-05-29

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