EP0253184B1 - Vorrichtung für den Schusseintrag an einer Bandgreiferwebmaschine - Google Patents

Vorrichtung für den Schusseintrag an einer Bandgreiferwebmaschine Download PDF

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Publication number
EP0253184B1
EP0253184B1 EP87109282A EP87109282A EP0253184B1 EP 0253184 B1 EP0253184 B1 EP 0253184B1 EP 87109282 A EP87109282 A EP 87109282A EP 87109282 A EP87109282 A EP 87109282A EP 0253184 B1 EP0253184 B1 EP 0253184B1
Authority
EP
European Patent Office
Prior art keywords
tape
wheel
recess
belt
picking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87109282A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0253184A1 (de
Inventor
Mario Tamaro
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.)
Sulzer AG
Original Assignee
Gebrueder Sulzer AG
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 Gebrueder Sulzer AG filed Critical Gebrueder Sulzer AG
Publication of EP0253184A1 publication Critical patent/EP0253184A1/de
Application granted granted Critical
Publication of EP0253184B1 publication Critical patent/EP0253184B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms
    • D03D47/276—Details or arrangement of sprocket wheels
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/271—Rapiers
    • D03D47/272—Rapier bands
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms

Definitions

  • the invention relates to a device for weft insertion on a belt rapier weaving machine, with a belt wheel driven in an alternating direction of rotation and a flexible entry belt carrying an insertion member for a weft thread, which is attached at one end to the belt wheel and which with winding and unwinding in a more is issued as a 360 ° circumferential wrapping area of the belt wheel of an oscillating movement transversely to the warp threads from or into the shed, as well as with a flexible guide element, which wraps around the part of the entry belt located on the belt wheel and a first section at a distance has a second section running from the entry belt and guided over two deflection rollers arranged at a distance from one another.
  • the guide element is formed by a rope, the two ends of which are each guided through a recess provided in the circumferential area of the band wheel against the axis of the band wheel and fastened to a tab arranged inside the band wheel body .
  • a screw In the circumferential area of the band wheel adjoining the cutout in the unwinding direction of the entry band, one end of the entry band is fastened by a screw.
  • a support section is formed on the circumference of the belt wheel, which has a thickness that is approximately constant over 100 ° of the circumference of the belt wheel and a thickness that is essentially spiral-like over the remaining circumference section and that increases continuously in the unwinding direction, this circumference section in the region of the recess ends with a gradation, the height of which corresponds to the sum of the thicknesses of the rope and the entry tape.
  • kinks can occur in the part of the entry belt that wraps around the clamping end, which lead to permanent deformation of the entry belt and thus the service life and can affect the leadership of the entry belt.
  • the guide element deflected in the area of the recess with a correspondingly small radius is also subjected to particularly high stress.
  • the invention has for its object to provide a particularly improved in this respect device of the type mentioned, which - with a simplified design of the tape wheel - a kink-free guidance of the entry belt when winding the tape wheel through an angle of more than 360 ° and a corresponding gentle guidance of the guide element also permitted in connection with belt wheels in a compact design.
  • At least one trough-like recess is provided on the circumference of the belt wheel for receiving one end section of the entry belt and / or one end section of the guide element, and that at least one can be fastened in the recess against the relevant end section of the entry belt and / or the guide element clampable clamping piece is provided, which is adapted to the course of the adjoining the depression in both circumferential sections of the surfaces to be wrapped and continuously curved over the depression in the circumferential direction of the support surface for the portion of the entry belt or the guide passed over the depression . of the guide element.
  • the device designed according to the invention permits particularly gentle guidance of the entry belt in a guideway which, from the clamping point arranged in the recess, runs flatly curved against the peripheral surface of the belt wheel. At the same time, when the clamping point is wound over, a secure guidance of the portion of the entry belt extending over the recess and the portion of the guide element which lies against it is ensured.
  • a kink-free run-up of the relevant section of the entry belt onto the transition point between the end section located in the depression and the part of the guide element already wrapping around the entry wheel or during the unwinding process is corresponding kink-free running of the relevant section of the entry belt can be achieved from the area of the said transition point, since the clamping piece designed and arranged according to the invention, with its arched support surface, prevents "sagging" of the sections of the entry belt and the guide element lying against the recess. Accordingly, additional stresses on the material, which is already highly stressed, in particular in connection with the large working widths and high weft insertion rates of today's weaving machines, are avoided.
  • a particularly compact design can be achieved with a tape wheel that can be rewound several times.
  • the entangled arrangement of Um Steering castors are known per se in connection with a lateral deflection of a rope-like, cut-off guide element; a lateral deflection of a band-like guide element has so far been avoided in the case of weft insertion devices of the type mentioned at the outset.
  • the design according to claim 2 ensures trouble-free lateral deflection and thus reliable guiding of the cut-off band-like guide element in two adjacent wrap areas of the band wheel.
  • the embodiment according to claim 2 leads, in particular, to a relatively low load on both the feed belt and the belt wheel, which is evenly distributed over the width of the guide belt, since high local loads, such as can occur when using a rope-like guide element, are eliminated.
  • the belt wheel which has to be stopped and accelerated again each time the direction of rotation changes, can therefore be of a correspondingly light construction, for example made of a plastic, and have a correspondingly low mass.
  • the band-shaped guide element can neither "dig" into the entry belt nor via this into the peripheral surface of the band wheel and can have a much smaller thickness than a rope-like design, so that even with multiple winding of the Band wheel results in a relatively small, alternately accelerating and decelerating moving mass.
  • a tight fit of the generally relatively dimensionally stable entry belt can already be ensured at the transition point between the clamping point and the peripheral region of the belt wheel.
  • the machine frame I contains on the left side and on the right side a carrier 3 with a holding plate 4, on which a belt wheel 5 is rotatably arranged.
  • I only shows the left side of the machine frame I with the left carrier 3, which is mirror-image to the right carrier, and the band wheel 5, which is mirror-image to the right band wheel.
  • a reed 6 is attached for guiding warp threads, not shown.
  • a first end section 7a of a flexible entry belt 7 is fastened to the circumference of the left band wheel 5, the second end section 7b of which bears a gripper head 8 intended for gripping one end of a weft thread, not shown.
  • a corresponding entry belt, also provided with a gripper head, is attached to the right belt wheel.
  • the two belt wheels are each driven in an oscillating and counter-rotating manner, with the winding and unwinding of the two entry belts 7 giving the gripper heads 8 fastened thereon an oscillating movement transversely to the warp threads out of or into the shed, not shown, formed by them.
  • the rapier heads 8 are constantly moved along the sley 2 to the middle of the shed and then pulled out of the shed again.
  • One end of a weft thread is transferred from a weft thread supply arranged on the right-hand side of the weaving machine, not shown, outside the shed to the rapier head arranged on the right entry belt.
  • the weft thread is inserted into the first half of the shed and in the middle of the shed is transferred to the rapier head 8 arranged on the left entry belt 7, through which the weft thread is then inserted into the second half of the shed.
  • the weft thread is cast in a known manner by the reed 6 in the tip of the shed, not shown.
  • the weft insertion device can also have a single belt wheel 5 and a single entry belt 7, which can be guided from one side of the loom over the entire weaving width and back, the gripper head of which carries out a complete weft insertion.
  • the rapier head 8 passes through the left edge of the shed.
  • the gripper head 8 is guided against the center of the shed by the entry band 7 moved when unwinding from the band wheel 5 according to arrow 10, after taking over the weft thread entered by the right gripper head - by winding up the entry band 7 according to arrow 10a - from the shed and after that Subject change for a new weft entry against the center of the shed and returned.
  • the entry belt 7 is wound with a wrap angle of more than 360 °, corresponding to the representation according to FIG. I, for example approx. 460 ° with the rapier head 8 located outside the shed, on the circumference of the belt wheel 5 and from the outlet point on the belt wheel 5 via a guide rail II guided against a guide track provided on the sley 2.
  • a belt-like, lengthened guide belt 12 is provided, which can have a smaller width than the entry belt 7.
  • the guide belt 12 wraps around the part of the entry belt 7 located on the belt wheel 5 and presses it - under the action of a spring arrangement 31 which can be braced against the guide belt 12 - against the circumference of the belt wheel 5.
  • a first end section 12a of the guide belt 12 is together with the corresponding one End section 7a of the entry belt 7 in a provided on the circumference of the belt wheel 5, flat domed trough-like recess 13 by a recessed insert 14 into this, which is clamped by a screw 15 via the two end sections 7a and 12a against the bottom of the recess 13. 4 and 5, the recess 13 can be delimited by flat convexly curved surface parts 13d and 13e which merge into the cylindrical peripheral surface of the belt wheel 5.
  • the deflection roller 16 is arranged on an axis 32 parallel to the axis of the belt wheel 5, which is attached to a support 33 connected to the machine frame I.
  • the deflection roller 17 is arranged on an axis 34 which is inclined with respect to the axis 32 and which is movably guided by a holder 35.
  • the holder 35 is fastened to a support part 36 connected to the machine frame I and contains the spring arrangement 31, shown in simplified form in FIG. I as a tension spring, by means of which the guide band 12 is held tensioned over the deflection roller 17.
  • the deflection roller 16 can also be guided in a movable manner and cooperate with a corresponding spring arrangement.
  • the guide belt 12 is - with the entry belt 7 wound up - with a looping angle of over 360 ° , corresponding to the illustration according to FIG. I, for example approximately 620 °, against which the recess 13 also extends over the second looping area 5b which the second end section 12b of the guide belt 12 is fastened by a second clamping piece 18 which can be inserted into the recess 13.
  • a second clamping piece 18 which can be inserted into the recess 13.
  • the deflection rollers 16, 17 are designed with cambered circumferential surfaces and are arranged so that they are interlocked so that the circumferential regions of the deflection rollers 16 and 17 facing the circumference of the belt wheel 5 are offset from one another in the axial direction of the belt wheel 5 and each against the first looping region 5a and the second wrap area 5b of the belt wheel 5 are oriented.
  • cooperating guide means of known type can be provided.
  • the depression 13 can be designed essentially symmetrically to a radial plane 20 running through the axis of rotation of the band wheel 5.
  • the clamping pieces 14 and 18 each have a cross section adapted to the shape of the recess 13 and each contain a support surface 14a or 18a adapted to the course of the portions of the surfaces to be wrapped around the recesses 13 in both circumferential directions of the belt wheel 5 for the relevant clamping piece 14 or 18 overwrapping portion of the entry belt 7 or the guide belt 12.
  • the clamping pieces 14 and 18 can each be designed asymmetrically with respect to the radial plane 20 by the support surfaces 14a and 18a, depending on the one or the other circumferential direction of the Band wheel 5 continuously rising, curved like a spiral over the "length" of the relevant clamping piece 14 or 18.
  • the clamping piece 14 can be designed such that it is in the position placed on the end sections 7a and 12a of the entry belt 7 and the guide belt 12 with an edge portion 14b which continues from the recess 13 against the peripheral surface of the belt wheel 5 Parts of the end portions 7a and 12 overlap, for example by an amount which corresponds at least approximately to the sum of the thicknesses of the clamped end portions 7a and 12a, over the circumferential surface of the band wheel 5, while one pointing in the opposite circumferential direction, the En the edge section 14c covering the end sections 7a and 12 lies in the region of the peripheral surface.
  • These support surfaces 14a and 18a allow a kink-free transition from the cylindrical circumferential surface of the belt wheel 5 to the thickness increased by the thickness of the entry belt 7 and the guide belt 12 (FIG. 4) or by the thickness of the guide belt 12 (FIG. 5) Surface of the corresponding part of the guide band 12 formed winding surface.
  • kink-free guidance of these belts can also be achieved by clamping pieces 14 and 18, each of which has the same dimension, e.g. are increased on one side in accordance with the thickness of the entry belt 7 and accordingly have identical cross sections.
  • the edge parts 14c and 18c of the clamping pieces 14 and 18 assigned to the ends of the end sections 7a and 12a and 12b can each be provided with a guide pin 21 which projects above the clamping surface of the respective clamping piece 14 and 18 and which is guided by a respective end section 7a, 12a or 12b provided opening 19 can be inserted into a guide opening 22 provided on the belt wheel 5 in the region of the recess 13.
  • a faulty insertion of the clamping pieces 14 and 18 is prevented by these guide pins 21 arranged asymmetrically on the clamping pieces 14 and 18.
  • the guide openings 22, e.g. can each be designed in the form of an elongated hole, which permits positioning of the relevant clamping piece 14 or 18, which can be set in the circumferential direction of the band wheel 5.
  • the entry belt 7 can have a zone 25 of less rigidity than in its remaining longitudinal extent. 6, with a constant strip thickness T, the entry strip 7 can have a layer 26 made of the relatively rigid base material of the entry strip 7 and continuing over the length A with a reduced strip thickness T i , and a layer 27, for example glued, connected to this layer 26 contain soft elastic material, the thickness S of which can correspond to the thickness Ti of the layer 26 as shown in FIG. 6.
  • the layer 26, which continues over the length section A and consists of the base material of the entry belt 7, can be arranged between two layers 27 made of flexible material and connected to them.
  • the thicknesses T i and S of these layers 26, 27 can correspond, for example, to one third each of the thickness T of the entry belt 7.
  • the layer 26 consisting of the base material of the entry belt 7 can have a graded thickness Ti which decreases towards the end of the belt, and the layers 27 made of flexible material can each be designed with a correspondingly increasing thickness S.
  • the portion of the entry belt 7 extending over the length section A can be designed with a thickness Ti that tapers conically towards the end of the tape and can be connected to the layer 27 of soft elastic material that has a correspondingly conically increasing thickness.
  • the entry belt 7 can have a thickness T 1 that tapers conically towards the end of the belt and can be connected to two layers 27 attached on both sides with correspondingly increasing thicknesses S.
  • two separate recesses 13 ′ and 13 ′′ can also be formed on the band wheel 5, which are arranged in mirror image offset with respect to one another in the circumferential direction of the band wheel 5 and which, viewed in the axial direction of the band wheel 5, each can have an asymmetrical, approximately wedge-shaped cross-section with respect to their greatest depth dimension .
  • the support surfaces 14a and 18a which rise in the opposite circumferential direction from the area of the circumferential surface of the band wheel 5, are formed, the over the Peripheral surface projecting edge portions 14b and 18b are each arranged in the converging cross-sectional area of the respective clamping piece 14 'and 18'.
  • the distinctive design of the recesses 13 'and 13 "prevents incorrect insertion of the clamping pieces 14' and 18 ', whereby the arrangement one specifically s guide part is unnecessary.
  • the support surfaces for the entry belt 7 and for the part of the guide belt 12 which is to be wound up and unwound next to it can be formed on a common clamping piece running over the two looping regions 5a and 5b.
  • the end sections 7a and 12a of the entry belt 7 and the guide belt 12 arranged in the same looping area 5a can also each be fastened by their own clamping piece in depressions of the belt wheel 5 offset in the circumferential direction.
  • another, e.g. rope-like guide element can be provided.
  • the arrangement according to the invention of a clamping piece, which is countersunk in a trough-like recess of the belt wheel and is designed according to the invention, can also be advantageous in connection with a guide element embodied approximately in the form of an endless belt, which only wraps around the outermost winding position of the portion of the entry belt located on the belt wheel .

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP87109282A 1986-07-15 1987-06-27 Vorrichtung für den Schusseintrag an einer Bandgreiferwebmaschine Expired - Lifetime EP0253184B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH282486 1986-07-15
CH2824/86 1986-07-15

Publications (2)

Publication Number Publication Date
EP0253184A1 EP0253184A1 (de) 1988-01-20
EP0253184B1 true EP0253184B1 (de) 1990-09-19

Family

ID=4242429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109282A Expired - Lifetime EP0253184B1 (de) 1986-07-15 1987-06-27 Vorrichtung für den Schusseintrag an einer Bandgreiferwebmaschine

Country Status (6)

Country Link
US (1) US4771815A (pt)
EP (1) EP0253184B1 (pt)
JP (1) JPS6328943A (pt)
BR (1) BR8703659A (pt)
DE (1) DE3765039D1 (pt)
SU (1) SU1748654A3 (pt)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0331801A1 (de) * 1988-03-09 1989-09-13 Contraves Ag Bandrad für den Schusseintrag an einer Webmaschine
DE58903434D1 (de) * 1988-07-22 1993-03-18 Sulzer Ag Schusseintragsvorrichtung einer greiferwebmaschine.
IT1236649B (it) * 1989-11-03 1993-03-25 Nuovo Pignone Spa Sistema perfezionato di azionamento a nastro della pinza portatrama per un telaio tessile senza navetta.
CH679937A5 (en) * 1989-11-29 1992-05-15 Sulzer Ag Weft insertion strip oscillating drive wheel - has single wall section with corrugated profile near rim for lightweight and rigidity
JPH08209494A (ja) * 1995-02-08 1996-08-13 Toyota Autom Loom Works Ltd レピア織機における緯入れ装置
JP5180668B2 (ja) * 2008-05-07 2013-04-10 三工機器株式会社 コイル巻線装置
DE102011009765B3 (de) * 2011-01-28 2011-11-10 Lindauer Dornier Gmbh Webmaschine mit verfahrbaren Begrenzungsmitteln sowie ein Verfahren zum Herstellen eines Gewebes
DE102012212169A1 (de) * 2012-07-11 2014-01-16 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Vorrichtung zum Zwischenspeichern von bandartigem Schussmaterial für eine Webmaschine und Webmaschine mit einer solchen Vorrichtung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3682204A (en) * 1969-06-02 1972-08-08 Raymond Dewas Weaving looms with external weft reserve
FR2427409A1 (fr) * 1978-05-31 1979-12-28 Rueti Ag Maschf Guidage de ruban pour un metier a tisser a griffes
GB2077699B (en) * 1980-06-16 1984-09-05 Loewy Robertson Eng Co Ltd Coiler drum with gripper mechanism
CH652764A5 (de) * 1981-10-14 1985-11-29 Rueti Ag Maschf Vorrichtung fuer den schusseintrag an einer bandgreiferwebmaschine.
EP0080191A1 (de) * 1981-11-20 1983-06-01 Helmut Meinunger Vorrichtung zum Aufwickeln einer Projektionsleinwand
IT1210932B (it) * 1982-09-03 1989-09-29 Omv Off Mecc Vilminore Nastro di comando di pinze portatrama in telai di tessitura avente rigidita' variabile.
JPS59187645A (ja) * 1983-04-01 1984-10-24 株式会社石川製作所 レピア織機のフレキシブルバンド押圧装置

Also Published As

Publication number Publication date
BR8703659A (pt) 1988-03-22
EP0253184A1 (de) 1988-01-20
JPS6328943A (ja) 1988-02-06
SU1748654A3 (ru) 1992-07-15
US4771815A (en) 1988-09-20
DE3765039D1 (de) 1990-10-25

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