EP0300087A1 - Vorrichtung zum Ausgleich von Kettfadenspannungsschwankungen bei der Fachbildung bei mehrsystemigen Flachwebmaschinen - Google Patents

Vorrichtung zum Ausgleich von Kettfadenspannungsschwankungen bei der Fachbildung bei mehrsystemigen Flachwebmaschinen Download PDF

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Publication number
EP0300087A1
EP0300087A1 EP87115298A EP87115298A EP0300087A1 EP 0300087 A1 EP0300087 A1 EP 0300087A1 EP 87115298 A EP87115298 A EP 87115298A EP 87115298 A EP87115298 A EP 87115298A EP 0300087 A1 EP0300087 A1 EP 0300087A1
Authority
EP
European Patent Office
Prior art keywords
warp threads
warp
thread
elements
deflecting
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Withdrawn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
EP87115298A
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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 EP0300087A1 publication Critical patent/EP0300087A1/de
Withdrawn legal-status Critical Current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
    • 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
    • D03D47/262—Shedding, weft insertion or beat-up mechanisms
    • D03D47/267—Shedding mechanisms
    • 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

Definitions

  • the invention relates to a device for compensating for warp thread tension fluctuations in shed formation in multi-system flat weaving machines, with movably mounted deflection means for the warp threads arranged on the thread path between the warp beam and the shed formation means, by means of which the warp threads can be deflected by a predetermined angle and under tension on their path are durable.
  • This thread deflecting element can consist of a single bar which is continuous over the width of the fabric and is mounted pivotably about an axis parallel to this; however, an embodiment is also known in which this strip is broken up into a plurality of identically designed, narrower, rigid individual strips which are arranged in a row next to one another without a gap and each of which is supported on the elastic member, in this case consists of a straight, circular cylindrical tube made of elastomeric material, preferably soft rubber or rubber, which is continuous over the width of the fabric and open at its ends, the wall of which is so thick that its rigidity is large enough for the elastic support of the individual strips of the thread deflecting element.
  • the object of the invention is therefore to remedy this situation and to create a device which, in multi-system flat weaving machines, ensures perfect tension compensation in the warp threads during shedding and thus ensures a precise weft thread stop.
  • the device mentioned at the outset is characterized according to the invention in that the deflecting means have a number of individual deflecting elements which are mounted so as to be movable independently of one another, each of which guides a single warp thread or a group of adjacent warp threads, and that the deflecting elements with them each provide a tension compensation for the the respective warp threads are coupled in the case of control means which provide limited movement and cause shedding, which are inevitably synchronized with the technical training resources.
  • the tension compensation of the warp threads occurs exactly progressively with the shed formation, so that the weft thread stop also takes place under precisely defined tension ratios of the warp threads, with the result that an exact course of the weft threads across the warp threads in the finished goods is ensured.
  • the warp threads are guided through the deflecting elements, so that they cannot get free of them or jam between them when the deflecting elements move in accordance with the progressive shedding. Since the individual deflection elements are positively moved by the control means in inevitable synchronization with the shed forming means, the change in length of the path of the individual warp threads occurring during shed formation can be compensated for perfectly.
  • the deflection elements are elastically resiliently supported by spring means.
  • spring means have leaf springs with which the deflection elements are connected. These leaf springs can expediently be aligned in the manner of spring tongues, essentially parallel to the warp threads running towards the deflecting elements, fixed at one end and anchored at the other end to the deflecting elements.
  • the spring means can move the deflecting elements at least in the direction of the associated warp threads be attached to this tractive force limiting sling.
  • the stop means can have at least one stop rail or rod which interacts with the leaf springs.
  • the control means coupled to the individual deflecting elements and imparting their movement corresponding to the advancing technical training can be of any desired type, for example also electromagnetic, in that electrical actuating magnets are assigned to the individual deflecting elements, for example, and are actuated accordingly in succession. It has proven to be particularly advantageous, however, if the control means have a camshaft that is rotatably mounted and positively coupled to the shed forming means, which camshaft is arranged to run parallel to the warp beam and the cams control the movement of the individual deflecting elements.
  • spring means have leaf springs, these are expediently held against the cams of the camshaft under pretension so that an exact scanning of the cam surface of the cams is ensured.
  • Each of the deflection elements advantageously has a number of separate thread guide elements which are arranged at a distance from one another in order to prevent the warp threads guided by them from getting tangled with one another or interfering with one another.
  • a simple pulling in of the warp threads allows an embodiment in which these thread guide elements are formed by webs which are oriented transversely to the thread running direction and which are held at the ends between bearing elements which cause the warp threads to be guided laterally. These parallel webs are expediently offset from one another both in the direction of the incoming and outgoing warp threads in order to keep the warp threads guided by them apart.
  • the multi-system weaving machine shown in FIG. 1 is constructed in a double-flat, so-called back-to-back construction.
  • the machine has a machine frame 1; it is set up for the simultaneous production of four fabric webs 2.
  • Each of the fabric webs 2 is wound up into a goods bale 3 rotatably mounted on the machine frame 1.
  • the warp threads 5 drawn off from the warp beams 4 rotatably mounted on the machine frame 1 are progressively moved apart in the direction of an arrow 6 from healds 7 movable transversely to the fabric webs 4 to form weaving shed 8, each shed being traversed by a weft thread carrier 9, the basic structure of which, for example is known from US-PS 3626 990.
  • the weft thread carriers 9 run one behind the other at a predetermined distance in the manner shown in FIGS. 1, 2 on a guideway which is formed on one side by a guide blade 10 in the form of a reed, through which the weft thread stop lamellae (not shown) protrude, which one cause further guidance of the weft carrier 9. Because of the structural details, reference is made, for example, to US Pat. No. 3,049,135.
  • the guideway along which the weft thread carriers 9 run has two rectilinear sections 15a (FIG. 2) and two adjoining semicircularly curved return sections 15b.
  • the weft thread carriers 9 of drive segments 16 are along this guideway moved in the same direction, which are either articulated directly to one another at articulation points 17 (FIG. 2) or which are fastened next to one another on an endless chain, wherein they either lie against one another with their adjacent end faces 20 (FIG. 2) or when passing through the straight sections 15a of the guideway can be arranged at a distance from each other.
  • the drive segments 16 combined in this way to form an endless chain are each guided in the curved return sections 15b via a chain wheel 21 which is rotatably mounted about a vertical axis in the machine frame 1.
  • Each of the two sprockets 21 is non-rotatably wedged onto a vertical main source 22, which is rotatably mounted in corresponding bearing parts in the machine frame 1.
  • At least one of the main shafts 22 is coupled via a gear connection indicated at 23 in FIG. 2 to a drive source in the form of an electric geared motor 24, which via the sprockets 21 causes the drive segments 16 to move in the same direction in the direction of the arrow 6 in FIG. 1, 2 granted.
  • Each of the drive segments 16 carries on the front side facing the guideway of the weft thread carrier 9 an essentially skid-shaped, elongated drive part 25 which is mounted with limited movement on the front side of the assigned drive segment 16 by means of a leaf spring 26 projecting on one side.
  • the leaf spring 26 presses the drive part 25 with elastic prestress against the guide blade 10 or an arcuate curved guide blade 27 adjoining the guide blade 10 in the arcuate return region 15b (see FIG. 2).
  • a weft thread carrier 9 is arranged opposite each drive part 25 and is permanently magnetically coupled to the drive part 25, as is described in US Pat. No. 3,618,640 and DE-PS 1,785,147.
  • a semicircularly curved guide rail 42 serves for the radial guidance of the weft thread carriers 9 when passing through each of the semicircularly curved return sections 15b of the guideway.
  • weft thread carriers 9 are successively made up of bobbins 29 (FIG. 1), to which so-called web stores can also be arranged, from which the weft thread is drawn off, using a weft thread delivery device shown schematically at 30 measured weft pieces supplied.
  • control channels 160 which are indicated schematically in FIG. 3 and into which feet 7b formed on shafts 7a of the healds 7 project.
  • the control channels 160 are designed such that during the longitudinal movement of the drive segments 16 in the direction of the arrow 6, the machines at 161 on corresponding frame-fixed machines share healds 7 which are mounted in a longitudinally displaceable manner and which give the reciprocating movement required for shedding.
  • the design and arrangement of the control channels 160 and the control of the healds 7 are explained in detail in US Pat. No. 3,749,135 (corresponding to DE-PS 1 963 208). Reference is hereby made to these statements.
  • the warp thread sheet released from the respective warp beam 4 initially runs approximately vertically upward in the manner shown in FIGS. 1, 3, before it is guided over a deflection roller 31 which acts on the machine frame 1 and rotates over the width of the fabric web and acts like a match beam is redirected to a horizontal plane.
  • the deflection roller 31 has a smooth cylindrical surface and is evidently arranged on the front of the weaving machine, so that the warp threads 5 running over it are accessible.
  • a device, generally designated 32, for compensating for warp thread tension fluctuations is arranged for each fabric web 2, the arrangement and structure of which can be seen in particular from FIGS. 3 to 5:
  • a plurality of identical elongated leaf springs 34 are screwed onto one end by means of screw bolts 35 (FIG. 3) on a support rail 33 which is horizontal and in the form of a profile tube and which is embodied in the form of a profile tube and which is anchored in place Go through screw holes 36 of the leaf springs 34.
  • the leaf springs 34 are arranged parallel to one another and arranged at a close distance in a keyboard-like manner. In the normal state, they lie in a common horizontal plane and are individual, ie independent of one another, around their clamping point at 35 100 such leaf springs 34 are present, for example, on one meter of web width.
  • Each of the leaf springs 34 protruding from the carrier rail 33 carries a warp thread deflection element 37 which is placed approximately centrally between the two ends and is rigidly connected to the respective leaf spring 34, the arrangement being such that the deflection elements 37 in the manner shown in FIG. 4 lie in a common vertical plane which runs parallel to the axis of the warp beam 4.
  • Each deflecting element 37 consists of an essentially U-shaped sheet metal bracket 38 which is welded or riveted to the associated leaf spring 34 and whose upwardly pointing legs as bearing elements hold a number (in the present case four) of webs 39 forming warp thread guide elements at the ends.
  • the cylindrical webs 39 polished on their surface and optionally hardened or abrasion-resistant coated, run parallel to one another and transversely to the direction of the warp thread. They are, as can be seen from FIGS. 3, 5, both in the direction of the incoming and the outgoing warp threads 5 offset from each other, so that their axes in an indicated in Fig. 5 at 40, obliquely to the respective leaf spring 34 level.
  • a group of, for example, ten warp threads is guided over each of the webs 39, but cases are also conceivable, in particular in the production of coarse fabrics, in which each of the webs 39 only deflects a single warp thread 5.
  • the parallel lateral legs of the U-shaped bracket 38 in each case cause lateral guidance of the warp threads 5 guided over the webs 39, so that these are prevented from being released from the deflection elements 37.
  • the leaf springs 34 arranged side by side in the manner described and aligned parallel to the warp threads 5 tapering from the deflecting roller 31 from the deflecting roller 31 are each coupled with control means which impart a controlled movement in the vertical direction to the deflecting elements 37.
  • control means are formed by a horizontal camshaft 42, which runs at right angles transversely to the leaf springs 34 and is arranged above the same, which is rotatably mounted on the machine frame 1 in bearings (not shown).
  • camshaft 42 is assigned to each of the fabric webs 2, each on one machine side lying two coaxial camshafts 42 are rotatably coupled together. On each side of the machine, these two coupled camshafts 42 are inevitably coupled to a vertical main shaft 22 via a second toothed belt pulley 46 via a second toothed belt pulley 46 at the input of the reduction gear 43 and an endless toothed belt 45, via a second toothed belt pulley 46.
  • Each of the camshafts 42 carries a number of non-rotatably mounted cams 47, the pitch of which corresponds to the center distance of the leaf springs 34 and each of which is assigned to its own leaf spring 34. 3, 4 show that the leaf springs 34 come into engagement with the leaf springs 34 designed in the manner of spring tongues on the side of the deflection elements 37 opposite the clamping point at 35. The arrangement is such that the leaf springs 34 are held in contact with the cams 47 of the associated camshaft 42 under their own bias.
  • a stop rail 48 is arranged in a fixed manner on the machine frame 1, against which the leaf springs 34 can be supported with their free ends and which thus pivot the leaf springs 34 about their clamping point at 35 in a clockwise direction, based on FIG. 3 Prevents when the camshaft 42 assumes the position shown in FIG. 3, in which the cams 47 assigned to the respective leaf springs 34 are out of engagement with the leaf springs 43 with their eccentric cam regions.
  • the stop rail 48 is only shown broken off in FIG. 4 in order not to obstruct the view of the ends of the leaf springs 34.
  • the cams 47 are arranged on the respective camshaft 42 in a helically rotated manner such that, when the camshaft 42 rotates, they progressively, limitedly, individually pivot the leaf springs 34 corresponding to the progressive formation of the shed 8 around their clamping point at 35, which effect a tension compensation the warp threads 5 in the shedding effect causing the warp thread deflection elements 37 to move up and down in the shed plane.
  • the reduction of the reduction gears 43 is selected such that the camshafts 42 make exactly one revolution during a weaving system run if, as shown, the cams 47 are designed as one-sided eccentrics. When using cams 47 in the form of two-sided eccentrics, each camshaft 42 only executes half a revolution per weaving system run.
  • each leaf spring 34 is determined by the shape of the curved surface of the cam 47.
  • the maximum deflection of each leaf spring 34 in the counterclockwise direction, based on FIG. 3, occurs when the shed 8 is closed during the weft stop. With the formation of waves, it progressively travels across the entire width of the fabric.
  • the sprockets 21 are driven clockwise by the electric gear motor 24, based on FIG. 2, so that the drive segments 16 move in the direction of the arrow 6 according to FIG.
  • the healds 7 are controlled via the control channels 160 of the drive segments 16 in such a way that weaving shed 8 are opened, progressing from left to right in a wave shape across the width of the respective fabric web 2, into which the weft thread carriers 9, which are moved synchronously, insert their weft thread.
  • the camshaft 42 assumes the position shown in FIG. 3, in which the warp thread deflection elements 37 assigned to these warp threads 5 are moved the most upward in the vertical shed plane, their movement thereby being limited is that the associated leaf springs 34 are supported with their ends on the stop rail 48 under the action of the warp thread pull directed upwards in the direction of an arrow 49 in FIG.
  • the thread travel of the warp threads 5 from the warp beam 4 to the goods bale 1 corresponds to FIG. 3.
  • the warp threads 5 are under a predetermined tension required for weaving.
  • the shed 8 is closed by corresponding control of the healds 7.
  • the leaf springs 34 assigned to the corresponding warp threads 5 are pivoted counterclockwise by their correspondingly rotated camshaft 42, with reference to FIG. 3, about 35, with the result that the associated deflection elements 37 are moved downward go and compensate for the extension of the thread travel caused by the return of the warp threads 5 from the deflected position (FIG. 3) corresponding to the open shed 8 into the shed plane.
  • the cams 47 are designed such that the warp thread tension remains essentially constant.
  • the carrier rail 33 and the stop rail 48 can be arranged in an adjustable manner in the machine frame in order to enable a matching to the respective conditions during the formation of the shed.
  • the subject level does not need to be exactly vertical. It can assume any suitable spatial angular position, in which case the warp threads 5 approaching the deflecting elements 37 are then arranged in a corresponding plane in such a way that the deflecting elements 37 cause a deflection of the warp threads 5 that is preferably 90 °.
  • other deflection angles can be used in individual cases; it only has to be ensured that the limited movement of the deflection elements 37 described can bring about the necessary warp tension compensation as the shed progresses.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP87115298A 1987-07-23 1987-10-20 Vorrichtung zum Ausgleich von Kettfadenspannungsschwankungen bei der Fachbildung bei mehrsystemigen Flachwebmaschinen Withdrawn EP0300087A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3724358 1987-07-23
DE19873724358 DE3724358A1 (de) 1987-07-23 1987-07-23 Vorrichtung zum ausgleich von kettenfadenspannungsschwankungen bei der fachbildung bei mehrsystemigen flachwebmaschinen

Publications (1)

Publication Number Publication Date
EP0300087A1 true EP0300087A1 (de) 1989-01-25

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ID=6332173

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Application Number Title Priority Date Filing Date
EP87115298A Withdrawn EP0300087A1 (de) 1987-07-23 1987-10-20 Vorrichtung zum Ausgleich von Kettfadenspannungsschwankungen bei der Fachbildung bei mehrsystemigen Flachwebmaschinen

Country Status (7)

Country Link
US (1) US4815504A (zh)
EP (1) EP0300087A1 (zh)
JP (1) JPS6433241A (zh)
KR (1) KR890002461A (zh)
CN (1) CN1030802A (zh)
BR (1) BR8801371A (zh)
DE (1) DE3724358A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011009765B3 (de) * 2011-01-28 2011-11-10 Lindauer Dornier Gmbh Webmaschine mit verfahrbaren Begrenzungsmitteln sowie ein Verfahren zum Herstellen eines Gewebes
JP6947816B2 (ja) * 2016-10-21 2021-10-13 嘉興徳永紡織品有限公司 織機、織物の製造方法、および超高密度織物

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1239637B (de) * 1958-06-27 1967-04-27 Andre Jaques Schaerer Dr Ing Vorrichtung zur Bildung eines Wanderfaches bei Webmaschinen
DE2329303A1 (de) * 1972-06-12 1974-01-03 Vyzk Ustav Bavlnarsky Verfahren und vorrichtung zur ueberwachung des beschickens der schusseintragsmittel von wellenwebmaschinen mit schussfaden
GB2130255A (en) * 1982-11-05 1984-05-31 Nuovo Pignone Spa Heald control system
DE3346030A1 (de) * 1983-12-20 1985-06-20 Institute für Textil- und Faserforschung Stuttgart, 7306 Denkendorf Webmaschine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1066958B (de) * 1959-10-08 Durkoppwerke Aktiengesellschaft, Bielefeld Flachwebmaschine
DE1072569B (de) * 1959-12-31 Durkoppwerke Aktiengesellschaft, Bielefeld Flachwebmaschine mit horizontalem Kettenfadenverl'auf sowie mit längs der Webbreite als Wanderwelle fortschreitender Fachbildung
DE1020578B (de) * 1952-07-22 1957-12-05 Trikotfabriken J Schiesser A G Webmaschine
CH414489A (de) * 1963-03-19 1966-05-31 Oerlikon Buehrle Holding Ag Verfahren zum Beschicken der Schützen von Webmaschinen mit Faden, und Einrichtung zur Durchführung des Verfahrens
CH427685A (de) * 1965-07-27 1966-12-31 Oerlikon Buehrle Holding Ag Vorrichtung an Wellenwebmaschinen zum Kettspannungsausgleich
DE1785147C3 (de) * 1968-08-16 1974-04-18 Adolf 7451 Hechingensickingen Linka Schützenantrieb und Schützenführung für Wellenfachwebmaschinen
DE1785416A1 (de) * 1968-09-20 1972-05-04 Adolf Linka Verfahren und Vorrichtung zur periodischen Lieferung abgemessener Schussfadenlaengen von einer Spule in einen den Schussfaden in einen kontinuierlich bewegten Schuetzen eintragenden pneumatischen Injektor
DE1963208C3 (de) * 1969-12-17 1974-07-04 Adolf 7451 Hechingensickingen Linka Wellenwebmaschine
CS149784B1 (zh) * 1970-04-28 1973-08-23
AT371846B (de) * 1981-11-25 1983-08-10 Chemiefaser Lenzing Ag Rundwebmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1239637B (de) * 1958-06-27 1967-04-27 Andre Jaques Schaerer Dr Ing Vorrichtung zur Bildung eines Wanderfaches bei Webmaschinen
DE2329303A1 (de) * 1972-06-12 1974-01-03 Vyzk Ustav Bavlnarsky Verfahren und vorrichtung zur ueberwachung des beschickens der schusseintragsmittel von wellenwebmaschinen mit schussfaden
GB2130255A (en) * 1982-11-05 1984-05-31 Nuovo Pignone Spa Heald control system
DE3346030A1 (de) * 1983-12-20 1985-06-20 Institute für Textil- und Faserforschung Stuttgart, 7306 Denkendorf Webmaschine

Also Published As

Publication number Publication date
JPS6433241A (en) 1989-02-03
DE3724358A1 (de) 1989-02-09
US4815504A (en) 1989-03-28
BR8801371A (pt) 1989-02-08
KR890002461A (ko) 1989-04-10
CN1030802A (zh) 1989-02-01

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