EP0629575B1 - Dispositif de transport de fil pour machines textiles - Google Patents

Dispositif de transport de fil pour machines textiles Download PDF

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Publication number
EP0629575B1
EP0629575B1 EP94105515A EP94105515A EP0629575B1 EP 0629575 B1 EP0629575 B1 EP 0629575B1 EP 94105515 A EP94105515 A EP 94105515A EP 94105515 A EP94105515 A EP 94105515A EP 0629575 B1 EP0629575 B1 EP 0629575B1
Authority
EP
European Patent Office
Prior art keywords
yarn
thread
transport device
roller
regulating disc
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 - Lifetime
Application number
EP94105515A
Other languages
German (de)
English (en)
Other versions
EP0629575A1 (fr
Inventor
Hartmut Hinterholzer
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0629575A1 publication Critical patent/EP0629575A1/fr
Application granted granted Critical
Publication of EP0629575B1 publication Critical patent/EP0629575B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/02—Rotary devices, e.g. with helical forwarding surfaces
    • B65H51/04—Rollers, pulleys, capstans, or intermeshing rotary elements
    • B65H51/08—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements
    • B65H51/12—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements in spaced relation to provide a series of independent forwarding surfaces around which material is passed or wound
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/32—Supporting or driving arrangements for forwarding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a thread transport device for textile machines, in particular for the supply of the weft thread of weaving machines, preferably ribbon looms, with a thread take-off roller, over the outer surface of which the thread to be drawn is guided in a frictionally locking manner, and the drive speed of which via at least one control disc with a working surface that tapers in the axial direction and a friction wheel running on this work surface is infinitely adjustable.
  • Such a thread transport device is known from DE 40 37 666 C1.
  • the speed of the thread take-off roller is regulated by an adjustment gear, which consists of a linearly conical regulating disc and a friction wheel running on the working surface of the regulating disc.
  • the thread take-off roller and a counterpressure roller pressing the thread against the thread take-off roller are each rotatably mounted at the end of a lever, each of the levers being arranged on an axially non-displaceable and also non-rotatable threaded spindle.
  • An axial change in the position of the two levers relative to the threaded spindle changes the point of frictional engagement of the friction wheel on the regulating wheel. Since the friction wheel is conically shaped, such an axial change in the contact point also leads to a change in the effective drive diameter of the regulating disk.
  • the device consists of a housing with input and output shafts, driving and driven friction elements with curved work surfaces and double-edge friction rollers mounted on a support and interacting with the friction elements.
  • the working surfaces of the friction elements and the rollers are designed in the form of rotational paraboloids and the carrier in the form of a support rod with end bushings for spindles for connecting the friction rollers.
  • the gear ratio is varied by rotating a handwheel and the position of the rollers relative to the friction elements is changed by axial movement of the carrier by means of a worm gear mechanism.
  • the invention has for its object to facilitate the setting of the correct thread transport speed in a generic thread transport device.
  • a particularly constant thread transport speed without slippage effects can be achieved if, according to one embodiment of the invention, the outer surface of the thread take-off roller is cylindrical and the thread is wrapped around it several times. In this way, the counterpressure roller provided in the prior art is also avoided, so that an overall simplified construction results.
  • a thread guide pin which extends at a small distance along the cylindrical outer surface of the thread guide roller and over which the thread is guided several times.
  • the thread guide pin ensures that the thread runs more smoothly.
  • the individual windings of the thread are particularly securely kept separate from one another if the thread guide pin is inclined to the longitudinal axis of the thread take-off roller. This results in a particularly smooth thread run and a more even thread transport speed. Notches in the thread guide pin can also be present for this purpose.
  • the thread guide pin can be designed as a freely rotatable cylinder. According to a preferred embodiment, however, the thread guide pin is arranged in a fixed manner. For this purpose, it can be attached to the fixed axis of the thread take-off roller.
  • a simplified construction of the thread transport device is achieved if the thread take-off roller and regulating disc are composed of a one-piece base body.
  • the regulating disk is rotatably mounted on the end of a lever which is axially adjustable by means of a threaded bushing provided with an internal thread on a fixed threaded spindle and is pivotable about the threaded spindle, the threaded bushing being made of plastic to increase the friction between the internal thread and the threaded spindle.
  • the thread transport device which is intended in particular for the supply of the weft thread from ribbon looms, has a thread take-off roller 1 which is connected in a rotationally fixed manner to a freely rotatable regulating disk 2.
  • the thread take-off roll 1 has a preferably rubberized, cylindrical outer surface 3, which is wrapped several times by the thread 4 to be transported.
  • the thread 4 does not lie on the entire circumferential surface of the thread take-off roller 1, but is guided with a revolution provided with notches 5, otherwise cylindrical thread guide pin 6, for each revolution.
  • the notches 5 of the thread guide pin 6 improve the guidance of the thread 4 during transport. They can also be used to guide several threads, provided the thread take-off roll 1 has a sufficient width.
  • the thread guide pin 6 is fixed. But it can also be freely rotatable.
  • the regulating wheel 2 and thus also the thread take-off roller 1 are driven via a friction wheel 7 with a fixedly mounted drive shaft 8.
  • the friction wheel 7 is provided with a rubberized running surface 9, which runs on a working surface 10 of the regulating wheel 2, and in this way the regulating wheel 2 drives.
  • the work surface 10 is tapered in the manner shown in FIGS. 1 and 2.
  • This taper is similar to a cone, but the working surface 10 does not taper linearly, as would be the case with an exact cone, but is a parabola with a vaulted one towards the regulating wheel 2, i.e. concave, contour similar.
  • FIG. 2 The exact geometry of this contour of the working surface 10 is shown in FIG. 2: If a system in the region of the large diameter of the regulating wheel 2 is set to the length coordinate L 'by a corresponding axial adjustment between the regulating wheel 2 and the friction wheel 7, one carried out in this region , axial length change from ⁇ L to a change in the effective investment radius from R 1 'to R 2 '. If a corresponding change in length .DELTA.L is carried out in the area of the small diameter of the regulating disk 2, ie in the case of the length coordinate L entered in FIG. 2, this leads to a change in the effective contact radius from R 1 to R 2 .
  • the contour of the work surface 10 is now such that the ratio of R 2 'to R 1 ' is equal to the ratio of R 2 to R 1 .
  • Each axial position change of a predetermined size ⁇ L between the friction wheel and the regulating wheel therefore always leads to the same ratio between the contact radii and thus also the contact diameters before and after this change in length ⁇ L.
  • the axial adjustment of the regulating disk 2 takes place by means of a knurled nut 11, which is provided with an axial extension 12, on the outer surface of which a lever 13 is mounted by means of a roller bearing 14. At the end of the lever 13, the regulating wheel 2 with the thread take-off roll 1 is freely rotatable.
  • the knurled nut 11 is firmly connected to a threaded bush 16 pressed therein.
  • the knurled nut 11 can be fixed together with the threaded bushing 16 on a threaded spindle 17 by means of a grub screw 15.
  • the threaded bushing 16 has an internal thread which engages in an external thread of the fixed and non-rotatably mounted threaded spindle 17.
  • Rotation of the knurled nut 11 leads to an axial displacement of the lever 13 relative to the fixed threaded spindle 17, and thus to the adjustment of the friction wheel gear consisting of the regulating wheel 2 and the friction wheel 7.
  • the lever 13 can be freely rotated on the extension 12 of the knurled nut 11 with the aid of the roller bearing 14, a spring 18 engaging the lever 13 ensuring that the regulating wheel 2 is securely seated on the lever at all times Friction wheel 7 ensures.
  • the threaded bushing 16 is made of plastic, so that the friction between the threaded bushing 16 and the threaded spindle 17 increases and the parts are therefore completely free of play.
  • FIG. 2 shows that the thread take-off roller 1 and the control disc 2, which is designed as a cam disc, are composed of a one-piece base body 19, on which a friction layer 20 is applied in the area of the thread take-off roller 1.
  • the one-piece design is not mandatory.
  • the thread guide pin 6, which is fixedly arranged on the fixed axis of the thread take-off roller 1 in the embodiment according to FIG. 2, is cylindrical with a smooth surface.
  • the notches present in the embodiment according to FIG. 1 for the thread guide are missing here. Nevertheless, a clean separation of the individual thread turns and thus a particularly uniform transport behavior of the thread take-off roll 1 is achieved. This also contributes in particular to the fact that the thread guide pin 6 extends slightly inclined with respect to the longitudinal axis 21 of the thread take-off roller 1.
  • the working surface 10 tapers in each case with a concave contour that is curved toward the regulating wheel 2.
  • an outwardly curved, ie convex, contour of the work surface 10 is provided.
  • the regulating wheel 2 with the working surface 10 is also not connected to the thread take-off roll 1, but is seated directly on the drive shaft 8.
  • the regulating wheel 2 forms the driving part, while the friction wheel 7 is the driven part which is connected in a rotationally fixed manner to the thread take-off roll 1 is.
  • 3 corresponds to the construction described above in accordance with FIGS. 1 and 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Knitting Machines (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Claims (9)

  1. Dispositif de transport de fil pour machines textiles, en particulier pour fournir le fil de trame de métiers à tisser, de préférence de métiers automatiques à tisser les rubans, comprenant un galet de dévidage de fil, sur la surface périphérique duquel le fil à dévider est guidé par friction et dont la vitesse de rotation d'entraînement peut être réglée progressivement par l'intermédiaire d'au moins une poulie de réglage, dont la surface de travail se rétrécit dans le sens axial, et d'une roue de friction tournant sur cette surface de travail, caractérisé en ce que la surface de travail (10) de la poulie de réglage (2) et donc le diamètre de contact par friction de la roue de friction (7) sur la poulie de réglage (2) se rétrécissent, de façon que chaque variation de longueur axiale de dimension prédéfinie (ΔL) entre la roue de friction (7) et la poulie de réglage (2) produit un rapport toujours identique entre les diamètres de contact (R2', R1' ; R2, R1) avant et après la variation de longueur (ΔL).
  2. Dispositif de transport de fil selon la revendication 1, caractérisé en ce que la surface de travail (10) se rétrécit avec un contour concave vers la poulie de réglage (2).
  3. Dispositif de transport de fil selon l'une des revendications précédentes, caractérisé en ce que la surface périphérique (3) du galet de dévidage de fil (1) est cylindrique et est entourée plusieurs fois par le fil (4).
  4. Dispositif de transport de fil selon la revendication 3, caractérisé par une broche guide-fil (6) qui s'étend à faible distance le long de la surface périphérique cylindrique (3) du galet guide-fil (1) et sur laquelle le fil (4) passe plusieurs fois.
  5. Dispositif de transport de fil selon la revendication 4, caractérisé en ce que la broche guide-fil (6) est inclinée par rapport à l'axe longitudinal (21) du galet de dévidage de fil (1).
  6. Dispositif de transport de fil selon la revendication 4 ou la revendication 5, caractérisé en ce que la broche guide-fil (6) est montée fixe.
  7. Dispositif de transport de fil selon la revendication 6, caractérisé en ce que la broche guide-fil (6) est fixée à l'axe fixe (21) du galet de dévidage de fil (1).
  8. Dispositif de transport de fil selon l'une des revendications précédentes, caractérisé en ce que le galet de dévidage de fil (1) et la poulie de réglage (2) sont constitués d'un corps de base (19) réalisé d'une seule pièce.
  9. Dispositif de transport de fil selon l'une des revendications précédentes, caractérisé en ce que la poulie de réglage (2) est montée en rotation à l'extrémité d'un levier (13) qui, au moyen d'une douille filetée (16) pourvue d'un taraudage, est monté avec une possibilité de réglage axial sur une broche filetée fixe (17) et avec une possibilité de pivotement autour de la broche filetée (17), la douille filetée (16) étant réalisée en matière plastique pour augmenter le frottement entre le taraudage et la broche filetée (17).
EP94105515A 1993-05-14 1994-04-09 Dispositif de transport de fil pour machines textiles Expired - Lifetime EP0629575B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4316194A DE4316194A1 (de) 1993-05-14 1993-05-14 Fadentransportvorrichtung für Textilmaschinen
DE4316194 1993-05-14

Publications (2)

Publication Number Publication Date
EP0629575A1 EP0629575A1 (fr) 1994-12-21
EP0629575B1 true EP0629575B1 (fr) 1997-06-11

Family

ID=6488111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94105515A Expired - Lifetime EP0629575B1 (fr) 1993-05-14 1994-04-09 Dispositif de transport de fil pour machines textiles

Country Status (4)

Country Link
EP (1) EP0629575B1 (fr)
AT (1) ATE154330T1 (fr)
CZ (1) CZ115094A3 (fr)
DE (2) DE4316194A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU45020A1 (fr) * 1962-12-17 1964-02-14
GB1397762A (en) * 1972-05-26 1975-06-18 Joseph B C Variable speed ratio drive mechanisms
FR2294117A1 (fr) * 1974-12-11 1976-07-09 Deboffles Regis Dispositif d'avance discontinue d'un fil ou analogue
SU715664A1 (ru) * 1977-07-27 1980-02-15 Всесоюзный научно-исследовательский институт трикотажной промышленности Устройство дл подачи нити к петлеобразующим органам в зальной машины
DE7915803U1 (de) * 1979-05-31 1979-09-13 Akzo Gmbh, 5600 Wuppertal Fadenzufuehreinrichtung
DE3820288C1 (en) * 1988-06-15 1989-08-24 Hartmut 5632 Wermelskirchen De Hinterholzer Thread-transport apparatus for textile machines
SU1610147A1 (ru) * 1988-12-29 1990-11-30 К.Т.Акимов Фрикционный вариатор
EP0486191A1 (fr) * 1990-11-13 1992-05-20 Borg-Warner Automotive, Inc. Variateur continue de vitesse à friction sans pivotement de contact
DE4037666C1 (en) * 1990-11-27 1992-02-06 Hartmut 5632 Wermelskirchen De Hinterholzer Yarn transport system esp. for automatic narrow fabric looms - has yarn take=up roll mounted on lever with counter pressure roll pressing yarn to be drawn off onto roll periphery

Also Published As

Publication number Publication date
EP0629575A1 (fr) 1994-12-21
CZ115094A3 (en) 1994-11-16
DE4316194A1 (de) 1994-11-17
DE59403084D1 (de) 1997-07-17
ATE154330T1 (de) 1997-06-15

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