EP0629575A1 - 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
EP0629575A1
EP0629575A1 EP94105515A EP94105515A EP0629575A1 EP 0629575 A1 EP0629575 A1 EP 0629575A1 EP 94105515 A EP94105515 A EP 94105515A EP 94105515 A EP94105515 A EP 94105515A EP 0629575 A1 EP0629575 A1 EP 0629575A1
Authority
EP
European Patent Office
Prior art keywords
thread
transport device
roller
working surface
regulating
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
EP94105515A
Other languages
German (de)
English (en)
Other versions
EP0629575B1 (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
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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 looms, 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 regulating disc with a working surface tapering in the axial direction and a friction wheel running on this work surface is infinitely adjustable.
  • a thread transport device of the type described above is known from DE 40 37 666 C1.
  • the speed of the thread take-off roller used here is regulated by an adjustment gear, which consists of a linearly conically designed regulating disc and a friction wheel running on the working surface of the regulating disc.
  • the thread take-off roller and a counter pressure 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 invention has for its object to facilitate the setting of the correct thread transport speed in a generic thread transport device.
  • a completely linear transmission behavior between the axial setting of the friction gear and the thread transport speed is achieved according to a further development of the invention when the working surface and thus the contact diameter of the frictional contact of the friction wheel on the regulating disc is tapered in such a way that each axial position change of a predetermined size between The friction wheel and regulating wheel always lead to the same ratio between the system diameters before and after the change in position.
  • the change in the thread transport speed is independent of whether the adjustment takes place at a low or at a high speed level. This considerably simplifies the setting of the correct thread transport speed for the operator. Multiple attempts or subsequent corrections until the correct speed is reached are no longer necessary.
  • 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 is wrapped several times by the thread. 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 rest on the entire circumferential surface of the thread take-off roll 1, but is guided with each revolution via a notch 5, which is otherwise cylindrical, and thread guide pin 6.
  • 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 roll 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 R1 'to R2'. If a corresponding change in length ⁇ L is carried out in the area of the small diameter of the regulating wheel 2, i.e. in the entered in Fig. 2 coordinate L, this leads to a change in the effective investment radius from R1 to R2.
  • the contour of the work surface 10 is now such that the ratio of R2 'to R1' is equal to the ratio of R2 to R1. This applies regardless of the respective length coordinate L.
  • 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.
  • This geometric specification determines the parabola-like contour of the work surface 10. In operation of the thread transport device, this has the advantage that a defined change in length ⁇ L always leads to the same change in speed and thus change in the thread transport speed. This leads to a considerable one Facilitating the correct setting and in particular setting the thread transport speed in advance.
  • 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 disk 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 to the thread pull-off roll 1 in a rotationally fixed manner 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)
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 true EP0629575A1 (fr) 1994-12-21
EP0629575B1 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)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
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
EP0486191A1 (fr) * 1990-11-13 1992-05-20 Borg-Warner Automotive, Inc. Variateur continue de vitesse à friction sans pivotement de contact

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU45020A1 (fr) * 1962-12-17 1964-02-14
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 9142, Derwent World Patents Index; AN 91-308965 *

Also Published As

Publication number Publication date
EP0629575B1 (fr) 1997-06-11
CZ115094A3 (en) 1994-11-16
DE4316194A1 (de) 1994-11-17
DE59403084D1 (de) 1997-07-17
ATE154330T1 (de) 1997-06-15

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