EP0075639A1 - Moyen de guidage pour une fausse navette dans le dispositif d'arrêt d'un métier à tisser - Google Patents

Moyen de guidage pour une fausse navette dans le dispositif d'arrêt d'un métier à tisser Download PDF

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Publication number
EP0075639A1
EP0075639A1 EP81810395A EP81810395A EP0075639A1 EP 0075639 A1 EP0075639 A1 EP 0075639A1 EP 81810395 A EP81810395 A EP 81810395A EP 81810395 A EP81810395 A EP 81810395A EP 0075639 A1 EP0075639 A1 EP 0075639A1
Authority
EP
European Patent Office
Prior art keywords
projectile
pawl
curved channel
arrangement according
ejector
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
EP81810395A
Other languages
German (de)
English (en)
Other versions
EP0075639B1 (fr
Inventor
Frantisek Jankovsky
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 DE8181810395T priority Critical patent/DE3167969D1/de
Priority to EP81810395A priority patent/EP0075639B1/fr
Priority to US06/408,925 priority patent/US4475575A/en
Priority to SU823488902A priority patent/SU1255060A3/ru
Priority to JP57170800A priority patent/JPS5865038A/ja
Publication of EP0075639A1 publication Critical patent/EP0075639A1/fr
Application granted granted Critical
Publication of EP0075639B1 publication Critical patent/EP0075639B1/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 guide arrangement for a weft insertion projectile in the catch mechanism of a weaving machine, which guide arrangement has a curved channel for guiding the projectiles arriving in the catch mechanism into a return transport device, furthermore at the end of the channel a pivotable pawl and an ejector which can be pushed into the curved channel and is guided in a straight guide for successive use Ejects each projectile while pivoting the pawl.
  • the invention is based on the object, the guide arrangement, which mainly comprises the guide channel and all parts delimiting it, as well as the design of the elements involved in the guide in the guide channel, for example the pawl and its mounting to make sure that the guide arrangement has no harmful effects on the projectiles it carries.
  • the invention consists in that the outer wall of the curved channel has a recess designed in such a way that it enables the projectile to run parallel to the ejection direction when it hits the pawl in the locked position. Due to the special position of each projectile immediately before the ejector is ejected, it can be achieved that it hits a corresponding area of the projectile with a relatively large impact surface for the purpose of ejection. Since the projectile is in the direction of ejection and relatively large butting areas meet, the specific pressure of these areas becomes relatively low. The parts are protected and can be worn less quickly. Furthermore, it cannot happen that the projectile experiences a torque in the curved channel when the ejector strikes, for example in a position that runs obliquely to the ejection direction. This also enables a longer service life for the parts.
  • an ejector In the housing of the catch mechanism 1 of a weaving machine, an ejector, designated as a whole by 3, is arranged to be movable up and down in a straight guide 2 according to arrow 4.
  • a link 6 At the ejector 3, a link 6 is articulated at 5, to which a drive lever 9, which can be pivoted back and forth about a fixed pivot point 8, acts at 7.
  • the ejector 3 At the lower end the ejector 3 has an elastic foot piece 16 e.g. made of rubber.
  • a gripper projectile 22 enters the catch mechanism 1 and is braked there.
  • a curved channel 23 of the catching mechanism there are some projectiles 22 which are successively guided according to arrow 24 - with simultaneous action of the centrifugal force in FIG. 1, 2 to the left - to a return transport device 20 consisting of a roller chain 25 and various drivers 26 .
  • the foremost projectile 22a is held by a pawl 28 which is arranged at the end 83 of the channel 23 and which can be pivoted about a fixed axis 29 (arrow 31).
  • the curved channel 23 has on its outer wall 23a a recess designated 51 as a whole in FIG. 3.
  • the outside Wall 23a runs approximately straight from point 52 to the left and forms a boundary surface 54 running at the same slope as slope 53 of projectile 22a.
  • recess 51 contains an edge.
  • the outer wall 23a runs vertically at 56, which corresponds to the vertical wall 57 of the projectile 22a.
  • the outer wall 23a also runs vertically.
  • the recess 51 is designed in such a way that the foremost projectile 22a can move into the vertical position shown in FIG. 3 under the action of the centrifugal force directed to the left in FIG.
  • the projectile is thus erected and can find space in the recess 51 with the part 85 located at the top left in FIG. 3.
  • the two boundary surfaces 54, 56 of the recess 51 are expediently matched in shape, position and with respect to the angle at the edge 55 as precisely as possible to the corresponding walls 53, 57 of the projectile 22a.
  • the pawl 28 has a bevel 58 which has the same inclination as the inclined wall 59 of the projectile 22a which is supported thereon and is erected vertically.
  • the ejector 3 After each shot entry, the ejector 3 is moved downward in a straight line in accordance with the direction of ejection according to arrow 40.
  • the foot piece 16 has at the bottom a horizontal surface 61 which strikes a corresponding horizontal wall 62 of the projectile 22a in the right region 61a.
  • the projectile Upon further downward movement, the projectile is pushed downward according to arrow 40 (FIG. 2), the pawl 28 being pivoted into the position 28a according to FIG. 2.
  • the pivoting takes place against the effect of a between the pawl 28 and the axis 29, elastic sleeve 63 which is vulcanized on both parts 29,28. Due to its spring action, the bush 63 strives to pivot the pawl into the position according to FIG. 1.
  • the position 22b of a projectile of the known guide arrangement is shown in dash-dot lines in FIG. 3. Due to the curved outer wall of the channel 23 in the region 65, the projectile 22b in FIG. 3 cannot assume a vertical position in this known embodiment. When the ejector 3 strikes, a linear contact therefore occurs at 66, as a result of which the parts 16, 22d are subjected to relatively high wear.
  • the shape of the pawl 28b of the known embodiment is shown in dash-dot lines in FIG. 3.
  • the contact surface 68 of the known pawl 28b does not have the same inclination as the inclined wall 69 of the projectile 22b held by it. This results in a linear contact of the parts 22b, 28b at 71. This also causes increased wear on the pawl as well as on the projectiles in the known design.
  • the vulcanized-in bush 63 allows an elas achieve table storage of the pawl 28.
  • the two lower locking projections 30 of the pawl 28, which can be seen particularly in FIG. 4 and press against the projectile 22a, are thereby pressed uniformly against the projectile 22a regardless of any tolerance-related defects, which is particularly important in the ejection phase according to FIG. 2.
  • the projectile 22a is thereby held uniformly at its front and rear ends by the pawl 28. It experiences the same contact pressure from both approaches 30 as it moves past in FIG. 2. As a result, the projectile falls downward into the return transport device 20 in the horizontal position 22c indicated by dashed lines in FIG. 4.
  • an oblique ejection position 22d of the projectile is shown, as can occur in an undesired manner with this type of construction. Due to the fact that the pawl 28 is mounted on the axle 29 by means of a slide bearing 72 and a spring 32 is used for the resilient action, a difference R (FIG. 8) between that at the front can occur during the ejection phase according to FIG. 2 of the projectile 22a and the puncture slot S which adjusts at the rear. As a result, the oblique position 22d of the projectile according to FIG. 7 can occur, even when the parts are machined precisely under the smallest tolerances.
  • the pawl 28 contains a single stop screw 75 arranged in its center, which in the stop position according to FIG. 1.5 against a lower web 76 of a U-shaped, generally designated 10, the one Wall of the guide 2 for the ejector 3 in the catch mechanism housing 1 forming sheet strikes.
  • this stop 75 in the middle of the pawl 28, it can be achieved that the parts can be provided with greater tolerances than is the case, for example, in the known design according to FIGS. 7, 8, where the pawl 28 at each end contains a stop screw 75a.
  • the two lugs 30 of the pawl 28 are arranged on a carrier 77 which is pivotally arranged on a vertical axis 79 of the pawl by means of a slide bearing 78.
  • the pawl 28 is mounted without play in a slide bearing 72 and is under the action of the spring 32.
  • a bush corresponding to the bearing bush 63 is omitted here.
  • the freely pivotable carrier 77 makes it possible to ensure that the two piercing slots S, T at the beginning and end of the projectile 22a are the same - even with relatively large tolerances of the parts - and the projectile in the horizontal position 22c in the return transport device 20 is pushed.
  • the inner wall of the curved channel 23 is designed in accordance with the line 23c indicated by dashed lines in FIG. 3.
  • the recess 51 can, for example, also be more or less rounded at 55. This is particularly worth considering if the projectile 22a also has a corresponding curvature.
  • position 22a of the projectile may differ slightly from the vertical position; in any case only to the extent that the ejector 3 can still strike the projectile flatly with its foot piece 16, so that the advantageous impact effect does not occur without a torque 72 remains.
  • bearing bush 63 If the bearing bush 63 is not connected to the parts 28, 29 by vulcanization, it only serves for elastic mounting and thus for the self-centering action of the pawl 28 with respect to the projectile 22 a to be held. A spring 32 must then be used for the spring action of the pawl.
  • the recess 51 is expediently adapted to the profile cross section. It can then e.g. run approximately according to the line 51a indicated by double dash-dotted lines in FIG. 3.
  • the contact surface 58 of the pawl 28 is also expediently adapted to the profile of the projectile 22 in such a way that the parts 58, 59 are in contact with one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP81810395A 1981-09-30 1981-09-30 Moyen de guidage pour une fausse navette dans le dispositif d'arrêt d'un métier à tisser Expired EP0075639B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE8181810395T DE3167969D1 (en) 1981-09-30 1981-09-30 Guideway for a dummy shuttle in the gripping device of a weaving loom
EP81810395A EP0075639B1 (fr) 1981-09-30 1981-09-30 Moyen de guidage pour une fausse navette dans le dispositif d'arrêt d'un métier à tisser
US06/408,925 US4475575A (en) 1981-09-30 1982-08-17 Catching mechanism for a weaving machine
SU823488902A SU1255060A3 (ru) 1981-09-30 1982-09-13 Приспособление дл приема зажимного челнока ткацкого станка
JP57170800A JPS5865038A (ja) 1981-09-30 1982-09-29 織機のキヤツチ機構における横糸插入投射体の案内装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81810395A EP0075639B1 (fr) 1981-09-30 1981-09-30 Moyen de guidage pour une fausse navette dans le dispositif d'arrêt d'un métier à tisser

Publications (2)

Publication Number Publication Date
EP0075639A1 true EP0075639A1 (fr) 1983-04-06
EP0075639B1 EP0075639B1 (fr) 1984-12-27

Family

ID=8188677

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81810395A Expired EP0075639B1 (fr) 1981-09-30 1981-09-30 Moyen de guidage pour une fausse navette dans le dispositif d'arrêt d'un métier à tisser

Country Status (5)

Country Link
US (1) US4475575A (fr)
EP (1) EP0075639B1 (fr)
JP (1) JPS5865038A (fr)
DE (1) DE3167969D1 (fr)
SU (1) SU1255060A3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3610429A1 (de) * 1986-03-27 1987-10-01 Boehringer Mannheim Gmbh Gerinnungsneutrale, hydrophile glasfasern
US4733919A (en) * 1987-03-10 1988-03-29 Hwp Group, Inc. Integrated pressure exhaust valve and fluid coupling

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019648A1 (fr) * 1979-06-01 1980-12-10 GebràœDer Sulzer Aktiengesellschaft Boîte réceptrice pour les fausses navettes dans un métier à tisser

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2696222A (en) * 1947-08-20 1954-12-07 Sulzer Ag Gripper shuttle loom
CH635624A5 (de) * 1979-02-05 1983-04-15 Saurer Ag Adolph Vorrichtung an schuetzenloser webmaschine zur uebergabe der schussfadenspitze.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019648A1 (fr) * 1979-06-01 1980-12-10 GebràœDer Sulzer Aktiengesellschaft Boîte réceptrice pour les fausses navettes dans un métier à tisser

Also Published As

Publication number Publication date
SU1255060A3 (ru) 1986-08-30
US4475575A (en) 1984-10-09
JPS5865038A (ja) 1983-04-18
DE3167969D1 (en) 1985-02-07
EP0075639B1 (fr) 1984-12-27

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