EP0297169A1 - Vorrichtung zur wahlweisen Lieferung abgemessener Längen wenigstens zweier verschiedener Schussfäden für die Schussfadenträger einer mehrsystemigen Webmaschine - Google Patents

Vorrichtung zur wahlweisen Lieferung abgemessener Längen wenigstens zweier verschiedener Schussfäden für die Schussfadenträger einer mehrsystemigen Webmaschine Download PDF

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Publication number
EP0297169A1
EP0297169A1 EP87115297A EP87115297A EP0297169A1 EP 0297169 A1 EP0297169 A1 EP 0297169A1 EP 87115297 A EP87115297 A EP 87115297A EP 87115297 A EP87115297 A EP 87115297A EP 0297169 A1 EP0297169 A1 EP 0297169A1
Authority
EP
European Patent Office
Prior art keywords
weft thread
weft
pressure rollers
bearing
injector
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.)
Withdrawn
Application number
EP87115297A
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German (de)
English (en)
French (fr)
Inventor
Adolf Dipl.-Ing. Linka
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.)
Lindauer Dornier GmbH
Original Assignee
Lindauer Dornier GmbH
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 Lindauer Dornier GmbH filed Critical Lindauer Dornier GmbH
Publication of EP0297169A1 publication Critical patent/EP0297169A1/de
Withdrawn legal-status Critical Current

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    • 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
    • D03D47/26—Travelling-wave-shed looms
    • 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
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • 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
    • D03D47/26—Travelling-wave-shed looms
    • D03D47/261—Preparation of weft
    • 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
    • D03D47/36—Measuring and cutting the weft

Definitions

  • the invention relates to a device for the optional delivery of measured lengths of at least two different weft threads for the weft thread carriers of a multi-system weaving machine with pneumatic weft thread supply, with a rotatably mounted, rotating measuring drum and an associated weft thread, between an inactive idle position and one which promotes the coming from a thread supply Weft thread to an injected with compressed air injector on the peripheral surface of the measuring drum pressed operating position adjustable pressure roller, wherein the pressure rollers in the axial direction of the measuring drum are stored adjacent to each other on the peripheral surface of the measuring drum adjacent bearing parts which are coupled with individually controllable actuating means.
  • the diameter of the measuring drum and its speed as well as the start, duration and end of the pressing period of the pressure roller on the circumferential surface of the measuring drum are matched to one another and to the movement of the weft thread carriers along their guideway such that when the weft magazine of a weft thread carrier enters the nozzle of the assigned injector, the Weft delivery starts, then a predetermined, measured weft thread length is inserted into the weft magazine while passing and the weft delivery is interrupted when the weft thread carrier exits the area below the injector nozzle.
  • the pressure roller is controlled via an actuating lever and a cam scanning roller, which directly scans an endless cam track rotating with the weft carriers of the weaving machine designed as a circular loom.
  • This is structurally complex.
  • this weft feed device is not set up for the alternate delivery of different weft threads, ie a so-called color changing operation of the weaving machine.
  • a multi-thread delivery mechanism known from DE-OS 28 00 639 permits such a program-wise color change of the weft thread in the fabric web the weft change can also be optionally programmed using a program control device.
  • the delivery mechanism has a constantly driven pair of delivery rollers, from which a delivery roller can be lifted off from the other delivery roller to interrupt the thread feed and in which both delivery rollers are coupled to one another by means of a positive-locking gear mechanism in such a way that they have exactly the same peripheral speed at which the weft thread is transported have clamping surfaces.
  • the length of one of the two delivery rollers is selected so that a plurality of optional wefts to be supplied can be passed axially next to one another over the circumferential surface of this delivery roller, while the other narrow delivery roller is slidably arranged in the axial direction according to the program and in the state lifted from the other delivery roller can be moved to the selected weft thread and then pressed against the peripheral surface of this delivery roller.
  • the time required for the selection process is comparatively large, as a result of which the performance of the weaving machine is undesirably limited.
  • a weft feed device for several wefts for several wefts, from which the invention is based and which is described in DE-PS 30 16 182.
  • a continuously driven measuring drum is provided, over the circumferential surface of which the individual weft threads are guided next to one another at axial spacing, each weft thread being assigned its own pressure roller, which according to the program can be pressed individually against the circumferential surface of the measuring drum in order to deliver the corresponding selected weft thread to effect.
  • the actuating mechanism for the pressure rollers is not described or illustrated in its structural details.
  • the object of the invention is, based on this prior art, to provide a device for the optional delivery of measured lengths of at least two different weft threads for the weft thread carriers of a multi-system weaving machine with pneumatic weft thread supply, which allows fast, precise selection of the individual weft threads to be delivered, the delivery ensures a precisely predetermined amount of thread and is also characterized by a simple, reliable construction, which allows free programming of the weft thread selection with simple means.
  • the device mentioned at the outset is characterized according to the invention in that that the pressure rollers are individually biased to their operating position by a biasing force and can be locked in their rest position by the actuating means, from which they can be released by selectively triggering the actuating means, and that the pressure rollers have a pressure roller which is controlled as a function of the movement of the weft thread carriers, the pressure rollers being terminated the weft delivery to the restoring return device is assigned.
  • each pressure roller comes into engagement abruptly with the peripheral surface of the rotating measuring drum when actuating its associated actuating means, so that the delivery of the selected weft thread starts correspondingly quickly and the whole election process or changing color takes only a very short time.
  • the return device brings all the pressure rollers back into the rest position after the weft delivery has been completed, so that they are ready for a new color selection for the next weft delivery.
  • the size of the pretensioning forces acting on the individual pressure rollers can be individually adjustable in order, for example, to allow adaptation to different weft materials.
  • the bearing parts for the pressure rollers move around a common axis are pivotally mounted bearing levers on which the pressure rollers are rotatably mounted and on which spring means which generate the prestressing force act.
  • the actuating means for each pressure roller have a pawl which acts on the bearing lever and is held resiliently in the engaged position and which is adjustable in the unlocking direction by an associated actuating magnet.
  • the actuating magnets can be controlled quickly by simple electrical actuating pulses with little effort, the respective pawl only having to cover a short actuation path to release the associated bearing lever.
  • the reset device is expediently designed to act jointly for all pressure rollers, so that, on the one hand, it is ensured that after completion of the weft delivery, all pressure rollers are in the same initial (rest) position for the next weft selection and, on the other hand, there are also quite simple mechanical conditions .
  • the restoring device can expediently have a restoring element which runs transversely to the bearing levers arranged next to one another and is movably mounted thereon and which can at least be brought into engagement with the bearing lever associated with the pressure roller in the operating position.
  • this restoring element can have a resetting bracket rotatably mounted about an axis running transversely to the bearing levers, which can be brought into engagement with a bracket part which overlaps all bearing levers.
  • the restoring element can have a camshaft which is rotatably mounted about an axis running transversely to the bearing levers and whose cams can be brought into engagement with the bearing brackets.
  • each weft is assigned its own injector.
  • the injectors can be combined to form a uniform injector block, whereby, depending on the structure of the weft thread carrier used in each case, the arrangement can also be such that at least one injector or the injector block carries at the end a wedge-shaped foot which is used to actuate a thread brake of the weft thread carrier.
  • the actuating means of the individual pressure rollers and the resetting device are expediently controlled according to the program by a common programmable program control device which additionally processes information about the position of the weft thread carrier to be loaded with weft thread with respect to the assigned injector.
  • the weft feeder has a substantially box-like housing 1 with a rectangular cross section, on the front wall 2 of which a cylindrical measuring drum 3 is rotatably mounted.
  • the measuring drum 3 carries a plasma coating shown at 4 in FIG. 3 with an exaggerated thickness and made of a thread-like, abrasion-resistant material; alternatively, it can also be hardened and polished in the area of its peripheral surface.
  • the measuring drum 3 is coupled to a drive source, not shown, which gives it a continuous rotary movement in normal operation of the loom.
  • a substantially rectangular frame 5 is arranged at a distance from it, which is placed on the front wall 2 of the housing 1.
  • the frame 5 has two parallel side walls 6 and two also parallel end walls 7 connecting them.
  • a cylindrical axis 8 is supported in the two side walls 6, on which a plurality (in the present case four) of double-armed bearing levers 9 are pivotably mounted.
  • the bearing levers 9 are aligned parallel to one another; they are held at a distance by spacer bushes 10 and guided laterally and form bearing parts for disc-shaped cylindrical pressure rollers 11 which have an elastic cover and can optionally be brought into engagement with the peripheral surface of the measuring drum 3.
  • each bearing lever 9 carries a pressure roller 11 rotatably mounted on it by means of an axis 12 and on that of the pressure roller 11 with respect to the pivot axis 8 opposite end at 13 is connected to a tension spring 14 which is suspended at the other end in a threaded bolt 15 designed as a spring abutment.
  • the threaded bolts 15 assigned to the individual bearing levers 9 are inserted into corresponding bores of a bracket 16 welded onto the two side walls 6, against which they are each supported by a nut 17.
  • the preloading force exerted on the respective bearing lever 9 by the tension spring 14 can thus be infinitely adjusted by corresponding adjustment of the associated nut 17.
  • the tension springs 14 endeavor to pivot the bearing lever 9, based on FIG. 3, counterclockwise about the pivot axis 8 and thereby press the associated pressure roller 11 against the circumferential surface of the rotating measuring drum 3, which is indicated by 18, not shown by one Bobbin or a web storage coming weft 18 is conveyed at the nip between the pressure roller 11 and the measuring drum 3 in the direction of an arrow 19 (Fig. 1.3).
  • each pressure roller 11 on the bearing lever 9 engaging, individually controllable actuating means are assigned.
  • each bearing lever 9 is formed at its end facing away from the tension spring 14 at 20 as a pawl tooth, which interacts with a catch 21 of an associated pawl 22.
  • the pawls 22 are pivotally mounted next to each other on the bearing lever 9 on a common horizontal transverse axis 23 which is held between the side walls 6.
  • Each of the pawls 22 designed in the manner of a double-armed lever is connected at its end opposite the detent 21 to a tension spring 24 which is hooked on the other end to a threaded bolt 25 which forms the spring abutment.
  • the threaded bolts 25 of all pawls 22 are inserted into corresponding bores in the lower end wall 7 of the frame 5 and are supported against the end wall by means of threaded nuts 26, which allow the prestressing of the tension springs 24 to be individually adjusted.
  • the springs 24 endeavor to hold the pawls 22 in engagement with the bearing levers 9 at 20 such that the pressure rollers 11 are locked in the rest position shown in FIG. 3.
  • an electromagnet 28 designed as a pull magnet is arranged with a small air gap to the pole face, which, when excited, pivots the associated pawl 22, in relation to FIG. 3, clockwise about the axis 23 and thus the Appropriate bearing lever 9 with the associated pressure roller 11 releases. All pull magnets 28 are placed on a common bearing bracket 29, which is connected to the two side walls 6.
  • a restoring device 30 is provided for the bearing lever 9, which allows the released bearing lever 9 to be returned to the rest position according to FIG. 3.
  • the resetting device 30 is designed to act jointly for all locking levers 9 and thus for all pressure rollers 11. It has a restoring element 31, which extends transversely to the bearing levers 9 arranged next to one another and is movably mounted thereon, and which can be brought into engagement with all bearing levers 9.
  • the resetting member 31 is designed in the form of a resetting bracket 32 which is rotatably mounted in the two opposite side walls with a horizontal axis of rotation and which has a cranked straight bracket part 33 which is axially parallel to the axis of rotation and which has the bracket 9 in that overlaps from FIG. 2.
  • the return bracket 32 which is bent from a cylindrical wire, is connected in a rotationally fixed manner at an end 34 protruding beyond the associated side wall 6 to an actuating lever 35 which, in the manner shown in FIG. 1, has a lever mechanism of one at 38, consisting of two articulated levers 36, 37 indicated camshaft is actuated.
  • the lever 37 is pivotally mounted at 39 on the front wall 2 of the housing 1; at its end facing away from the lever 36, it is connected to a tension spring 40, which has one end in a housing-fixed Spring abutment 41 is attached.
  • the camshaft 38 is positively coupled to a main shaft of the drive device of the multi-system weaving machine in such a way that it executes exactly one complete revolution, while the weft magazine 42 of a weft thread carrier indicated in FIG. 1 at 43 on its guideway at the associated nozzle opening 44 of the weft delivery device from stationary weft injector 45 supplied with measured weft lengths 18.
  • the gear arrangements used to drive the camshaft 38 are part of the weaving machine and are therefore not shown.
  • the resetting device 30 works with a resetting member in the form of a camshaft 31a rotatably mounted in the two side walls 6, which carries non-rotatably mounted cams 46 assigned to the individual bearing levers 9.
  • the camshaft 31a is connected in a rotationally fixed manner to a drive wheel lying on the outside of the adjacent side wall 6, which in the present case is formed by a toothed belt pulley 47, which is in positive engagement with a toothed belt 48, which in turn depends on the drive source of the camshaft 38 according to the embodiment Fig. 1 to 3 is driven synchronously with the movement of the weft carrier 43 in the manner already described.
  • Each of the pressure rollers 11 is assigned its own weft thread 18 (FIG. 1), in the present case four weft threads 18 being guided next to one another at equal intervals and distributed over the width of the peripheral surface of the measuring drum 3.
  • a separate injector 45 is provided for each of the weft threads 18 of different colors or consisting of a different material, the arrangement being such that the injectors 45 arranged closely next to one another are combined or integrated into a uniform, narrow injector block 460, which at its injector nozzle openings 44 adjacent end has a laterally attached wedge-shaped foot 480, which is indicated at 470 and indicates the direction of movement of the weft thread carriers 43, which serves to actuate a thread brake (not shown) of the passing weft thread carrier 47.
  • the basic structure of such an injector 45 is known, for example, from US Pat. No. 3,626,990.
  • the associated compressed air supply line is indicated at 49 in FIG. 1.
  • a throttle valve 50 which is designed as a solenoid valve and can be controlled according to the program via a control line 51 by a program control device 52 (computer) indicated schematically in FIGS.
  • the program control device 52 also controls the actuating magnets 28 of the individual pawls 22 via control lines 53 and receives via a line 54 provides additional information about the position of the weft thread carrier 43 to be loaded with a weft thread 18 with respect to the associated injector 45.
  • the reset device 30 is ineffective; its restoring member 31, 31a is in a position in which it does not hinder pivoting of the bearing levers 9 about the pivot axis 8 in the counterclockwise direction, based on FIG. 3.5.
  • the program control device 52 receives a corresponding trigger command via line 54. Thereupon, depending on the program entered, she also searches for the weft thread 18 which the weft thread carrier 43 is to be loaded and conducts an electrical actuation pulse to the corresponding actuation magnet 28.
  • the throttle valve 50 assigned to the injector 45 corresponding to the selected weft 18 receives an actuation pulse via line 51, by which it is actuated, so that the injector is pressurized with the full compressed air and thus for the conveyance of the weft into the Weft magazine 42 is ready.
  • the selected weft thread 18 is now delivered and inserted into the weft thread magazine 42 via the injector nozzle opening 44 until the weft thread carrier 43 begins to emerge from under the injector.
  • the camshaft 38 or the drive source which drives it and is synchronized with the movement of the weft thread carriers 43 has rotated so far that the restoring element 31, 31a with the one selected in the operating position is selected via the lever gear 36, 37 or via the toothed belt 48 Bearing lever 9 comes into engagement with what the associated pressure roller 11 is lifted from the circumferential surface of the measuring drum 3 and thus the weft delivery is stopped.
  • a thread brake is inserted by the program control device 52, which locks the weft thread on its path from the thread source to the measuring drum 3.
  • the associated throttle valve 50 receives an actuating pulse from the program control device 52, so that it reduces the compressed air exposure of the injector 45 to a value which maintains a certain tension in the weft piece, but at the same time damages (fraying, etc.) the stationary weft piece by it prevents airflow flowing around it.
  • the diameter of the measuring drum 3 and its speed and the length of time over which a pressure roller 11 is pressed in the manner described against the circumferential surface of the measuring drum 3 are so matched to one another that during the effectiveness of the pressure roller 9 a precisely measured weft length over the Injector 45 is inserted into a weft magazine 42.
  • the pressure rollers 11 are freely rotatable on their bearing levers 9 in the illustrated embodiment. Embodiments are also conceivable in which they are driven at the same peripheral speed as the measuring drum 3.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP87115297A 1987-06-27 1987-10-20 Vorrichtung zur wahlweisen Lieferung abgemessener Längen wenigstens zweier verschiedener Schussfäden für die Schussfadenträger einer mehrsystemigen Webmaschine Withdrawn EP0297169A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3721309 1987-06-27
DE3721309A DE3721309C1 (de) 1987-06-27 1987-06-27 Vorrichtung zur wahlweisen Lieferung abgemessener Laengen wenigstens zweier verschiedener Schussfaeden fuer die Schussfadentraeger einer mehrsystemigen Webmaschine

Publications (1)

Publication Number Publication Date
EP0297169A1 true EP0297169A1 (de) 1989-01-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87115297A Withdrawn EP0297169A1 (de) 1987-06-27 1987-10-20 Vorrichtung zur wahlweisen Lieferung abgemessener Längen wenigstens zweier verschiedener Schussfäden für die Schussfadenträger einer mehrsystemigen Webmaschine

Country Status (6)

Country Link
EP (1) EP0297169A1 (ja)
JP (1) JPS646149A (ja)
KR (1) KR890000712A (ja)
CN (1) CN1030267A (ja)
BR (1) BR8800831A (ja)
DE (1) DE3721309C1 (ja)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3626990A (en) * 1968-09-20 1971-12-14 Adolf Linka Method and apparatus for intermittently feeding measured lengths of weft thread from a supply bobbin to an injector for injection into a storage-type shuttle
DE2800639A1 (de) * 1978-01-07 1979-08-02 Sipra Patent Beteiligung Wellenfach-webmaschine
DE2938921A1 (de) * 1979-09-26 1981-04-02 Mayer & Cie Gmbh & Co, 7470 Albstadt Einrichtung zum laden der schussfadentraeger von webmaschinen
EP0039009A1 (de) * 1980-04-26 1981-11-04 Adolf Dipl -Ing. Linka Verfahren und Vorrichtung zum pneumatischen Eintragen des Schussfadens in die Schussfadenträger einer mehrsystemigen Webmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3626990A (en) * 1968-09-20 1971-12-14 Adolf Linka Method and apparatus for intermittently feeding measured lengths of weft thread from a supply bobbin to an injector for injection into a storage-type shuttle
DE2800639A1 (de) * 1978-01-07 1979-08-02 Sipra Patent Beteiligung Wellenfach-webmaschine
DE2938921A1 (de) * 1979-09-26 1981-04-02 Mayer & Cie Gmbh & Co, 7470 Albstadt Einrichtung zum laden der schussfadentraeger von webmaschinen
EP0039009A1 (de) * 1980-04-26 1981-11-04 Adolf Dipl -Ing. Linka Verfahren und Vorrichtung zum pneumatischen Eintragen des Schussfadens in die Schussfadenträger einer mehrsystemigen Webmaschine

Also Published As

Publication number Publication date
JPS646149A (en) 1989-01-10
DE3721309C1 (de) 1988-07-21
CN1030267A (zh) 1989-01-11
KR890000712A (ko) 1989-03-16
BR8800831A (pt) 1989-01-03

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