EP0297170A1 - Mehrsystemige Webmaschine mit permanentmagnetischem Schussfadenträgerantrieb - Google Patents

Mehrsystemige Webmaschine mit permanentmagnetischem Schussfadenträgerantrieb Download PDF

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Publication number
EP0297170A1
EP0297170A1 EP87115299A EP87115299A EP0297170A1 EP 0297170 A1 EP0297170 A1 EP 0297170A1 EP 87115299 A EP87115299 A EP 87115299A EP 87115299 A EP87115299 A EP 87115299A EP 0297170 A1 EP0297170 A1 EP 0297170A1
Authority
EP
European Patent Office
Prior art keywords
weft thread
carrier
guideway
drive
weft
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Withdrawn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
EP87115299A
Other languages
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 EP0297170A1 publication Critical patent/EP0297170A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/24—Mechanisms for inserting shuttle in shed
    • D03D49/26—Picking mechanisms, e.g. for propelling gripper shuttles or dummy shuttles
    • 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
    • D03D47/266—Weft insertion mechanisms

Definitions

  • the invention relates to a multi-system weaving machine with a permanent magnetic weft carrier with an at least one essentially rectilinear region and at least one adjoining curved region having an endless guideway for the weft carrier, which is delimited on one side by a guide blade over at least part of the length of the rectilinear region over the fabric width , on which the weft thread carriers are guided, the weft thread carriers being magnetically coupled to individual drive segments, which are movably mounted in one direction next to the guideway of the weft thread carriers in a fixed, side-by-side, mutual assignment, and to which a drive source driving them together is assigned.
  • Such a multi-system weaving machine in the so-called back-to-back design is described in DE-PS 30 16 182.
  • the weft thread carriers On the front and the back of this weaving machine, the weft thread carriers each run through a straight section of their guideway, in the area of which one or more fabric webs are produced.
  • the drive of the weft thread carrier takes place via the drive segments which are butted against one another at the end of an endless chain, each of which carries a row of permanent magnets on a side facing the shed which, together with permanent magnets arranged in the respective weft thread carrier, produce a magnetic coupling between the weft thread carrier and the drive segment, as is shown in the Principle is explained in US-PS 36 18 640 and DE-PS 17 85 147.
  • the two rectilinear sections of the guideway of the weft thread carriers are connected to one another by two arcuate curved return sections, in the area of which the weft thread carriers emerging from the fabric are guided in a semicircular way.
  • two sprockets are provided in the area of the return sections, via which the drive segments, which, as mentioned, are connected to form an endless chain, are spread out like a fan when passing through this return section.
  • weft thread carriers are guided by a straight guide blade which is formed by the reed and represents a stable slideway for the weft thread carriers magnetically coupled to their drive segments.
  • the weft thread carriers become direct from the drive segments taken over, so that between the facing pole faces of the permanent magnets of the drive segments and the weft thread carrier there is only the plastic slide film of the weft thread carrier, which is provided on the side of the weft thread carrier containing the pole faces and facing the guide blade, in order to ensure a low-friction sliding movement of the weft thread carrier the guideline. Because of the relatively small air gap between the associated pole faces of the permanent magnets, the attractive forces acting between these pole faces are very large, with the result that the weft thread carriers are not torn from their drive segments even under the effect of the centrifugal forces occurring when the semicircular return sections are passed through.
  • weft thread carriers Before re-entering a new fabric section to be produced on the subsequent straight part of the guideway, however, the weft thread carriers must be guided back onto the guide sheet, which leads to considerable difficulties, particularly at high speeds of the weft thread carriers.
  • a circulation speed of only 1.4 m / sec. the weft thread carrier and a distance of 20 cm between adjacent weft thread carriers would namely hit 7 weft thread carriers per second on the guide sheet or one of these upstream landing pads, which is an unbearable noise pollution would bring with it and would cause an impermissible stress on the sliding surface of the weft thread carrier and the run-on bar.
  • the object of the invention is therefore to remedy this and to create a multi-system weaving machine in which not only the weft thread carriers are held magnetically tear-proof on the drive segments when passing through the curved return sections, but also a low-noise and wear-free smooth transition at high weaving speed and a large number of weft thread carriers the weft thread carrier on the guide sheet is guaranteed.
  • each drive segment has a lifting device for the associated weft thread carrier lying directly on it when passing through the areas of the guideway adjoining the guide blade, and that the weft thread carrier when approaching it the guide sheet is automatically actuated in a distance-dependent manner from the lifting device bringing the drive segment onto the guide sheet.
  • the individual weft thread carriers are raised against the magnetic coupling forces so far from the drive segments that they gently and wear-free run onto the guide sheet, which takes over the guiding through the shed in the further course of their movement. Since the weft thread carriers are lifted off immediately, the lifting process does not cause any frictional stresses on the weft thread carriers or the drive segments which could result in undesired wear.
  • the lifting device is actuated in each case in the rectilinear part of the guideway in which centrifugal forces no longer occur which, at high weaving speeds, could lead to tearing of weft thread carriers from their drive segments.
  • a gentle and thus low-noise drainage of the weft thread carriers emerging from the rectilinear guideway section from the guide blade can be achieved by subsequently arranging a discharge ramp which is at least partially wedge-shaped in cross section.
  • the guide blade In corresponding In the direction of movement of the weft thread carrier, the guide blade can be preceded by a ramp that is at least partially wedge-shaped in cross section.
  • control cams which are arranged in a fixed manner in the movement path of the drive segments and which can optionally be adjustable in order to be able to adjust the height by which the weft thread carriers are lifted from the drive segments in accordance with the respective requirements.
  • the control cams can also be adjustable in the longitudinal direction of the guideway, as a result of which the time at which they take effect can be adjusted.
  • the lifting device has at least one slide or plunger movably mounted on the drive segment, which is arranged on one side to engage the weft thread carrier held on the drive segment and can be actuated by the control cam.
  • the slide or tappet is expediently spring-biased in the direction of the control cam; For safety reasons, as seen in the direction of movement of the weft thread carrier, a cam surface resetting the slider or plunger can be arranged in front of the ramp, which prevents a return spring from failing to prevent a protruding slider or plunger from striking the guide blade and damaging or damaging it.
  • the lifting device expediently has two cam-controlled slides or plungers which are provided next to one another at a spacing and are arranged in a gripping manner in the region of the two ends of the weft thread carrier, so that the weft thread carrier is first raised at its front end in the direction of movement, so that the magnetic binding forces over its length progressively be overcome.
  • 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 bottom of the machine frame 1 rotatably mounted warp beams 4 are progressively moved apart in the direction of an arrow 6 from healds 7 movable transversely to the fabric webs 4 to form compartments 8, each compartment being passed through by a weft carrier 9, the latter Shape in detail can be seen, for example, from FIGS. 3, 4.
  • 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 and on the other side by weft thread stop lamellae 11 a bed 12 arranged on the machine frame 1 are pivotally mounted about an articulation point at 13. Their lateral guidance takes place, on the one hand, through the reed rods of the guide blade 10 and, on the other hand, through guide rods 14 inserted into the bed 12 at a distance.
  • the mechanism which gives them their pivoting movement is not shown in detail; it is known and in principle consists of two rollers which move together with the weft thread carriers 9 and which Cause a tilting movement around the articulation point 13.
  • 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 are moved in the same direction by drive segments 16, 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 18 (FIG. 4) at 19, being at Passing through the straight-line sections 15a of the guideway either with their adjacent end faces 20 lying against one another (FIG. 2), or can be arranged standing parallel to one another.
  • 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, at least one of which is coupled to a drive source, not shown, which rectifies the drive segments 16 Movement in the direction of arrow 6 of FIG. 1 granted.
  • the individual drive segments 16 are guided horizontally and vertically on suitable guide rails — for example at 22 in FIG. 1.
  • the drive segments bear in detail on their underside facing the healds 7 Control channels, not shown, into which feet formed on the healds of the healds 7 project, as is explained in principle in US Pat. No. 3,749,135 and DE-PS 19 63 208.
  • weft carriers are successively supplied from bobbins 23 with weft pieces cut to length via a weft feed device shown schematically at 24.
  • the weft delivery devices 24 are described, for example, in US Pat. No. 3,626,990.
  • Each of the drive segments 16 has on the front side facing the guideway of the weft thread carrier 9 a straight surface 26 which extends at right angles to the end surface 20 and into which the pole surfaces of a number - in the present case six - permanent magnets 27 are inserted, spaced apart from one another are arranged.
  • each weft thread carrier 9 is provided on its side facing the guide blade 10 with permanent magnets 28, the pole face of which is covered by a slide film 29 made of plastic material (FIGS. 3, 4).
  • the arrangement and polarity of the permanent magnets 27, 28 are described in detail in US Pat. No. 3,618,640 and DE-OS 1,785,147.
  • the interaction of the permanent magnets 27, 28 results in a magnetic coupling of the weft thread carriers 9 to the drive segments 16, with a weft thread carrier 9 being assigned to each drive segment 16.
  • the weft thread carriers 9, which are thus carried along by the continuously synchronously moving drive segments 16, are supported on the guide blade 10, the facing pole faces of the permanent magnets 27, 28 being held at a distance from one another caused by the guide blade 10.
  • the guide sheet 10 extends essentially only along the straight-line sections 15a of the guideway of the weft thread carriers 9 which serve to produce the fabric webs 4. Viewed in the direction of movement of the weft thread carriers 9, the guide sheet 10 is followed in each case by a discharge ramp 30 which is wedge-shaped in cross section (FIG. 4), which transfers the weft thread carriers 9 shortly before the transition into the curved return path 15b of their guideway to the flat front surface 26 of the drive segments 16, so that they rest directly on the drive segments 16.
  • each drive segment has a lifting device which works with two parallel, spaced-apart slides or plungers 32, which are displaceably mounted in corresponding bearing bores 33 of ribs 34 of the drive segments 9 at right angles to the surface 26 assigned to the permanent magnets 27.
  • Each of the slides or plungers 32 is under the action of a return spring 35 which tends to push it to the right in relation to FIG. 4 into a retracted position in which the (left) front end of the slider or plunger 32 is spaced apart from the guideline 10. This retracted position is defined by a stop pin 36, which can come to a stop on the associated rib 34 and against which the associated return spring 35 is supported.
  • the distance between the two sliders or plungers 32 is selected such that they come into contact near the front and rear ends of the associated weft thread carrier 9, as can be seen from FIG. 4.
  • the slides or tappets 32 of the individual drive segments 16 are controlled in a travel-dependent manner by a control cam 37 (FIG. 2,6), which is arranged in a stationary manner on the machine frame 2 at the transition point from the semicircular guideway section 15b to the rectilinear guideway section 15a.
  • the control cam 37 - as seen in the direction of movement of the weft thread carriers 9 - has a starting section 37a which is more inclined with respect to the rectilinear movement path of the drive segments 16 and the rectilinear guideway section 15a, which is followed by a transfer region 37b which runs parallel to the movement path or is only slightly inclined with respect to it. as can be seen from FIG. 6,
  • the control cam 37 is already arranged in the rectilinear guideway section 15a, so that when it takes effect, the corresponding weft thread carrier 9 is no longer under the action of centrifugal forces such as those resulting from the curvature of the guideway.
  • the guide blade 10 of the rectilinear guideway section 15a is preceded in the manner shown in FIG. 6 by a ramp ramp 370 which is at least partially wedge-shaped in cross section and which is arranged in a fixed manner on the bed 12 and with their tapering against the direction of movement (arrow 6) of the weft thread carrier 9 is directed.
  • the run-up ramp 370 is arranged in front of a stationary cam surface 38 which runs obliquely to the movement path of the drive segments 16 and which forms a safety device which ensures that if a return spring 35 fails, the slides or plungers 32 which then start on the cam surface 38 inevitably into it retracted position are moved back so that they do not run against the ramp 370 or the guide sheet 10 and can damage one of these parts.
  • the weft thread carriers 9 of the weaving machine described so far are driven as follows:
  • the weft thread carriers migrating at predetermined intervals and magnetically coupled to the drive segments 16 insert the weft piece stored in them into the respectively assigned compartment 8. They are guided with their slide film 29 on the guide sheet 10, which limits their guide path inwards and against which they are pressed by the forces exerted by the permanent magnet 27, 28.
  • each weft thread carrier 9 runs over the discharge ramp 30 in the manner already described on the flat surface 26 of its associated drive segment 16, on which it is held with great force, since the air gap between the mutually assigned pole surfaces of the permanent magnets 27, 28 is very small.
  • FIGS. 3, 4 The state immediately before the respective weft thread carrier 9 has run off from the guide sheet 10 is illustrated in FIGS. 3, 4.
  • the slides or plungers 32 are each held in their retracted position by their return springs 35, in which contact with the guide blade 10 is excluded.
  • each of the drive segments 16 After passing through the curved guideway section 15b - in FIG. 2 at the top - each of the drive segments 16 reaches the area of the control cam 37 with its slides or tappets 32 in the manner shown in FIGS. 5,6, which possibly along the guideway and in its height is adjustable.
  • the slide or plunger 32 lying at the front in the direction of movement comes into engagement with the more inclined run-up area 37a of the control cam 37, with which the weft thread carrier 9 increasingly increases from the force exerted by the permanent magnets 27, 28 Surface 26 is lifted until the rear slide or plunger 32 begins its lifting movement.
  • the weft thread carrier 9 is initially inclined with respect to the surface 26, which has the advantage that the lifting force does not have to be applied suddenly, but gradually during the advance movement of the weft thread carrier 9.
  • the weft thread carrier 9 is finally brought to such a distance from the surface 26 of the drive segment 16 via the slider or plunger 32 which interacts with it that it slides smoothly on the ramp ramp 370 as it continues to move and thus onto the subsequent guide sheet 10 is transferred without large restraining forces acting on it against its direction of movement, which could lead to displacement or tearing of the weft thread carrier 9 from the drive segment 16.
  • a weft thread delivery device 24 introduces weft thread into the weft carrier 9, which the weft carrier 9 inserts into the compartment 8.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP87115299A 1987-05-30 1987-10-20 Mehrsystemige Webmaschine mit permanentmagnetischem Schussfadenträgerantrieb Withdrawn EP0297170A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3718306A DE3718306C1 (de) 1987-05-30 1987-05-30 Mehrsystemige Webmaschine mit permanentmagnetischem Schussfadentraegerantrieb
DE3718306 1987-05-30

Publications (1)

Publication Number Publication Date
EP0297170A1 true EP0297170A1 (de) 1989-01-04

Family

ID=6328795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87115299A Withdrawn EP0297170A1 (de) 1987-05-30 1987-10-20 Mehrsystemige Webmaschine mit permanentmagnetischem Schussfadenträgerantrieb

Country Status (9)

Country Link
US (1) US4790358A (enrdf_load_stackoverflow)
EP (1) EP0297170A1 (enrdf_load_stackoverflow)
JP (1) JPS63303147A (enrdf_load_stackoverflow)
KR (1) KR880014159A (enrdf_load_stackoverflow)
CN (1) CN1016804B (enrdf_load_stackoverflow)
BR (1) BR8800829A (enrdf_load_stackoverflow)
DE (1) DE3718306C1 (enrdf_load_stackoverflow)
IN (1) IN165689B (enrdf_load_stackoverflow)
SU (1) SU1625334A3 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100400729C (zh) * 2002-03-06 2008-07-09 林贞惠 挠性梭
US6948530B2 (en) * 2004-01-02 2005-09-27 Yi-Shan Yao Weaving machine
CN100351446C (zh) * 2004-02-24 2007-11-28 姚懿珊 具有磁力牵引装置的磁悬浮梭子织布机
WO2012101624A1 (en) * 2011-01-26 2012-08-02 Rainis Dov A support apparatus and method for a sliding frame

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618640A (en) * 1968-08-16 1971-11-09 Adolf Linka Magnetic shuttle drive for continuously progressing sheds in weaving looms
CH581215A5 (en) * 1974-10-01 1976-10-29 Tsnii Chlopchatobumasch Promy Shuttle positioner and transporter in a multiple feed loom - lining up shuttle accurately in and out of the shed
US3989069A (en) * 1973-10-24 1976-11-02 Vyzkumny Ustav Bavinarsky Method of and apparatus for compensating for weft tension in traveling-wave shedding looms
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

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1066958B (de) * 1959-10-08 Durkoppwerke Aktiengesellschaft, Bielefeld Flachwebmaschine
US2845093A (en) * 1952-07-22 1958-07-29 Schiesser Ag Trikotfabriken Method of and means for weaving
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
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
CS148468B1 (enrdf_load_stackoverflow) * 1970-04-28 1973-02-22
DE3346030A1 (de) * 1983-12-20 1985-06-20 Institute für Textil- und Faserforschung Stuttgart, 7306 Denkendorf Webmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618640A (en) * 1968-08-16 1971-11-09 Adolf Linka Magnetic shuttle drive for continuously progressing sheds in weaving looms
US3989069A (en) * 1973-10-24 1976-11-02 Vyzkumny Ustav Bavinarsky Method of and apparatus for compensating for weft tension in traveling-wave shedding looms
CH581215A5 (en) * 1974-10-01 1976-10-29 Tsnii Chlopchatobumasch Promy Shuttle positioner and transporter in a multiple feed loom - lining up shuttle accurately in and out of the shed
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
BR8800829A (pt) 1988-12-20
CN88100370A (zh) 1988-12-14
CN1016804B (zh) 1992-05-27
IN165689B (enrdf_load_stackoverflow) 1989-12-09
DE3718306C1 (de) 1988-07-07
KR880014159A (ko) 1988-12-23
JPS63303147A (ja) 1988-12-09
SU1625334A3 (ru) 1991-01-30
US4790358A (en) 1988-12-13

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