EP0131495A1 - Vorrichtung zum Herstellen einer Dreherfachleiste in Webmaschinen - Google Patents

Vorrichtung zum Herstellen einer Dreherfachleiste in Webmaschinen Download PDF

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Publication number
EP0131495A1
EP0131495A1 EP84401268A EP84401268A EP0131495A1 EP 0131495 A1 EP0131495 A1 EP 0131495A1 EP 84401268 A EP84401268 A EP 84401268A EP 84401268 A EP84401268 A EP 84401268A EP 0131495 A1 EP0131495 A1 EP 0131495A1
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EP
European Patent Office
Prior art keywords
oscillating
bars
lever
crowd
guiding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP84401268A
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English (en)
French (fr)
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EP0131495B1 (de
Inventor
Guy Gosciniak
Pascal Scherrer
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.)
Alsacienne de Construction de Material Textile
Alsacienne de Constructions Mecaniques SA
Original Assignee
Alsacienne de Construction de Material Textile
Alsacienne de Constructions Mecaniques SA
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.)
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Publication date
Application filed by Alsacienne de Construction de Material Textile, Alsacienne de Constructions Mecaniques SA filed Critical Alsacienne de Construction de Material Textile
Publication of EP0131495A1 publication Critical patent/EP0131495A1/de
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Publication of EP0131495B1 publication Critical patent/EP0131495B1/de
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C7/00—Leno or similar shedding mechanisms
    • D03C7/06—Mechanisms having eyed needles for moving warp threads from side to side of other warp threads

Definitions

  • the invention relates to the execution of false selvedges on weaving machines by means of at least one additional warp yarn and two twisted yarns crossed in gauze pitch.
  • Such false edges are used to consolidate the edges of the fabric when it is made on weaving machines without shuttle where each successive pick is cut near the edge of the width after its insertion in the crowd.
  • the object of the invention is to provide a device for forming a false edge which does not have the aforementioned drawbacks of the devices mentioned above.
  • the device comprises: a support to be fixed on the weaving machine next to one end of the shed, a first oscillating lever pivotally mounted on an axis carried by said support and parallel to the facade, said lever being provided with at least one tongue terminating in an eye for guiding an additional chain wire, the amplitude of the oscillating movements and the location of the travel of said first oscillating lever being such that the eyes of the tongues move between the plane of one of the layers of the crowd and a position located beyond the bisector plane of the crowd, a second oscillating lever also mounted pivotally on an axis carried by the support and parallel to the facade, said lever being provided with two bars parallel to the facade which are movable one against the other in a direction parallel to the facade and which each have at least one eye for guiding a turn wire, the amplitude of the lation and the constitutionalsi.d oscillate the location of the travel of said second oscillating lever being such that the guide wires of the lathe wires move between the plane of the other
  • Such a device comprises only light parts and small dimensions, without sudden reciprocating movements, so that it can reach high speeds; it does not require, for itself, the use of any harness frame; finally, it allows the formation of false selvedges of any number of additional warp threads, and therefore very solid, as is necessary by the structure of certain fabrics.
  • the device for executing a false selvedge shown in FIG. 1 comprises a support 1 to be fixed on a loom next to one end of the crowd. It is understood that, for the execution of a false edge at the other end of the crowd, a similar device would be placed on the other side of the loom.
  • false edges of the genre in question have several, for example four, additional warp threads and twice the number of tower wires, ie eight in the example.
  • FIG. 1 false edges of the genre in question have several, for example four, additional warp threads and twice the number of tower wires, ie eight in the example.
  • the first oscillating lever 2 is mounted for pivoting, at an intermediate point of its length gueur on an axis 11 fixed on the support 1; it has openings, such as 12, intended to lighten it.
  • One of its arms carries an axis 14 (see also Figures 2 and 3) on which a roller 15 is mounted for contact with a cam 16 under the action of a return spring 17 which is a helical spring of compression threaded on a rod 18, one end of which, in the form of a yoke 19, is articulated, by an axis 22, on the end of the other arm of the swing lever 2, while the other end of the rod 18 slides , with play, in a guide 23 mounted in the support 1; the spring 17 is therefore trapped between this guide and the base of the yoke 19 so that it urges the lever 2 to pivot on the axis 11 in the direction of the arrow fl which tends to apply the roller 15 against the cam 16
  • the tongues 3 are fixed, by one of their ends, to the bent end of the
  • the second oscillating lever 6 is also mounted idly, at an intermediate point of its length, on a pivot 31 fixed on the support 1; it also has lightening openings such as 32.
  • One of its arms carries an axis 33 on which a roller 34 is mounted for contact with another cam 35 under the action of a return spring 36 threaded on a rod 37, one end of which in the form of a yoke 38 is articulated, by an axis 39, on the end of the other arm of this second oscillating lever 6, while the other end of the rod 37 slides, with play, in a guide 42 mounted in the support 1; the spring therefore urges the lever to pivot on the axis 31 in the direction of the arrow f2 (FIG. 1) which tends to apply the roller 34 against the cam 35.
  • the cam 35 has a stepped hub 44 (FIG. 2) which constitutes a primary rotary member and into which are force-fitted the outer rings of two ball bearings 45, 46, the inner rings of which are clamped on a fixed shouldered axis 47 itself to the support 1 by means of a nut 48 screwed onto the corresponding threaded end of said axis.
  • the first cam 16 is fixed to the cam 35 by means of two screws 41 (FIG. 1), it has a central hole of polygonal shape, for example square, threaded on a prismatic part of conjugate section of the outer surface of the hub 44 of the cam 35. Between these two cams, an eccentric 49 is tightened (to which we will return later) threaded similarly on the polygonal part of the hub.
  • the two cams have profiles of generally cylindrical shape having two diametrically opposite hollows, the hollows of one of the cams being substantially opposite the hollows of the other in this example, in addition, the two rollers 15, 34 are located substantially in the same radial geometric plane P (FIG. 3) of the camshaft 47, while the axes 11, 31 of pivoting of the two oscillating levers 2, 6 are located respectively on either side of this geometric plane, so that the two oscillating levers 2 and 6 pivot substantially at the same time, but in the opposite direction given the general arrangement of the assembly.
  • the branch of the second oscillating lever which already carries the roller 34 also carries the bars 7 of control of the tower wires, by means of a box 52 secured to said lever and formed of two half-shells assembled one on the other by screws 53.
  • the bars 7 slide in this box, in a parallel direction to all the aforementioned axes and, at the same time, parallel to the face 51, in phase opposition, under the action of a slide 55 (see also FIGS.
  • the two cams 16, 35 as well as the eccentric 49 are driven together permanently and always in the same direction, by means of a transmission which comprises a toothed pulley fixed on the hub 44 of the cam 35 by means of screws 66 and a toothed belt 67 which passes over this pulley and over another pulley (not shown) itself driven from a shaft whose speed of rotation is linked to that of the crankshaft of the weaving machine.
  • a transmission which comprises a toothed pulley fixed on the hub 44 of the cam 35 by means of screws 66 and a toothed belt 67 which passes over this pulley and over another pulley (not shown) itself driven from a shaft whose speed of rotation is linked to that of the crankshaft of the weaving machine.
  • the ratio of the transmission is such that the cams and the eccentric make only one complete revolution while the crankshaft of the machine makes two revolutions, that is to say that the two oscillating levers 2 and 6 are actuated with a frequency equal to that of the formation of the crowd since the cams each have two recesses, while the eccentric 49 and the drawer 55 are actuated at a frequency which is only half of the previous one. It follows that the tongues 3 and the bars 7 plunge into the dihedral angle of the crowd at each crowd formation, while the same bars 7 only move alternately, in one direction or the other, only each new crowd and therefore find their initial position only one crowd out of two.
  • the amplitude of the oscillating movements and the location of the travel of the first oscillating lever 2 are such that the eyes 27 of the tongues 3 for guiding the additional warp threads move between the plane of one of the layers of the crowd and a position located beyond the bisector plane of the crowd; in the present example, the eyes 27 move between a low position situated in the plane of the lower tablecloth 81 (FIG. 10) of the crowd and a high position situated above the bisector plane of the crowd, but very close to this plan.
  • the amplitude of the oscillating movements and the location of the travel of the second oscillating lever 6 are such that the eyes 9 of the bars 7 for guiding the turn wires 8 move between the plane of the other layer of the crowd and a position located beyond the bisector plane of the crowd; in the present example, the eyes 9 move between a high position situated in the plane of the upper ply 83 (figure 10) of the crowd and a low position located below the bisector plane of the crowd, but very close to this plane.
  • a hook 71 ( Figures 1, 4 and 10) which is located in the vicinity of the tongues 3, is formed by the end of a long rod 72 clamped in a flange 73 mounted on a pivot 74 fixed on the support 1.
  • the rod 72 is slidably mounted in another flange 75 mounted on another pivot 76 fixed on the arm of the first oscillating lever 2 which already carries the tongues 3.
  • the hook 71 is parallel to the face 51 and undergoes an upward and downward movement. synchronism with a pivoting movement of the first oscillating lever 2; its purpose is to compensate for thread floats during the formation of the edge.
  • each normal pick 85 is inserted into the shed above an additional thread of the selvedge chain 4 and below the two turn threads 8, c 'that is to say at a time when the tongues 3 occupy their low position in Figure 10 and the bars 7, their high position.
  • the two turn threads 8 associated with each additional warp thread 4 must cross under said additional warp thread, that is to say that the relative sliding movement of the two bars 7 must occur at a time. where the tabs 3 are in the high position and the bars 7 in the low position.
  • gauze pitch shown in Figure 11.
  • the cams 16 and 35 are suitably wedged relative to the main shaft of the machine weave and that the eccentric 49 is properly wedged with respect to the cams.
  • the normal picks will be suitably inserted between the warp and selvedge threads and, on the other hand, the turn threads 8 will be located, during the insertion of the successive normal picks, sometimes to the right, sometimes to the left of the corresponding additional selvedge chain thread. All normal picks pass over the extra selvedge warp threads and below the lathe threads.
  • FIGS. 6 and 6a correspond to the instant when the turn wires 8 cross each other below the additional warp wires by the relative sliding.
  • Figures 7 and 7a show the positions of the bars 7 relative to the tongues 3 during the insertion of a normal pick 85 of fabric during manufacture; in FIG. 8, the tongues 3 are raised and the bars 7 lowered, the insertion of the pick is completed; finally, in FIGS. 9 and 9a, the bars have already slid relative to each other, crossing under the additional warp threads to prepare the gauze pitch which will form by the insertion of the following normal pick .
  • FIGS. 12 and 13 a variant of the sliding bars control mechanism 7 is shown.
  • the drawer 55 instead of having crossed cam grooves, as in the example described above, ends in two branches divergent 81 in the form of a "V" engaged in corresponding inclined notches 82 formed in the adjacent faces of the two bars 7.
  • the reciprocating sliding movement of the drawer 55 is transformed into a simultaneous sliding movement of the two bars in the housing 52, the movement of each bar occurring in the opposite direction to that of the other and in a direction perpendicular to that of the movement of the control slide 55, as in the embodiment described above and under the same phase and amplitude conditions , so the result is the same.
  • first oscillating lever 102 which carries tongues 103 for controlling additional warp threads 104 (see also FIG. 18) of false edge formation and a second oscillating lever 106 which carries strips 107A, 107B for controlling tower wires 108.
  • the first oscillating lever 102 is fixed on an axis 111 parallel to the face 151 (FIG. 16) and mounted in two ball bearings 112, 113 (FIG. 15) housed in a housing 114 forming a bearing fixed on the support 101.
  • the axis 111 is driven by an alternating pivoting movement by a control system which comprises: a crank 115 (see also figure 17) fixed on the axis 111, a roller 116 mounted for rotation on an axis 120 fixed in the end of this arm, a cam 117 against which said roller is engaged, a general shouldered control pin 118 on which the cam is fixed by means of screws 119, a toothed pulley 122 fixed against the cam by screws 123 and a toothed belt 124 which passes over the toothed pulley 122 as well as over another pulley (not shown) itself driven from a shaft whose speed of rotation is linked to that of the crankshaft of the weaving machine.
  • a control system which comprises: a crank 115 (see also figure 17) fixed on the axis 111, a roller 116 mounted for rotation on an axis 120 fixed in the end of this arm, a cam 117 against which said roller is engaged, a general shouldered control pin 118 on which the cam is fixed by
  • the ratio of the transmission is such that the cam 117, which has two bumps, makes only one complete revolution while the crankshaft of the weaving machine makes four turns. With each crowd formation, the lever 102 is therefore lowered or raised.
  • the axis 118 pivots in two ball bearings 128, 129 mounted in a housing 131 forming a bearing fixed on the support 101.
  • the roller 116 is kept constantly in contact with the cam 117 under the action of a helical compression spring 133 which is threaded on a rod 134, one end of which has an articulated head 135, by a pin 136 on a curved extension 137 of the crank 115 and the part of which adjoins the other end slides with a certain operating clearance in a guide 138 fixed to the support 101.
  • the second oscillating lever 106 consists of a set of two arms 106A and 106B, the distal ends of which are bent at right angles parallel to the facade so as to form the two strips 107A, 107B for controlling the tower wires, while their ends proximal are mounted on the axis 118 in a very particular way.
  • the arm 106A is secured to a housing 141 which encloses a ball bearing 142 mounted on a first part of a sleeve 143 fixed on the rotary axis 118 and, in a similar manner, the arm 106B is secured to a housing 144 which encloses a ball bearing 145 mounted on the second part of the sleeve 143.
  • the exterior surfaces of the two aforementioned parts of the sleeve 143 are cylindrical, but they are not coaxial with the geometric axis of said sleeve; they each make an angle "A" with said geometric axis, as indicated in FIG. 15. It follows that, for the position of axis 118 shown in the drawing, the median planes of the two ball bearings 142, 145 form an angle of value "2A" between them and intersect to the right of the figure.
  • the whole of the second oscillating lever 106 performs, at the same time, an upward and downward movement from the angular oscillation movement of the axis 111 by means of a connection which comprises: an axis 147 carried by an extension 148 of the first oscillating lever 102, a double link 149, one end of which is articulated on the axis 147 and the other end on an axis 152 engaged simultaneously in the holes of the two arms 106A, 106B.
  • the two arms 106A, 106B are elastically urged to move away from each other by a helical compression spring 154 threaded on a shouldered axis 155, the two ends of which are engaged respectively in two holes made in the two arms. .
  • the general arrangement is such that, for the high and low positions, respectively, of these two oscillating levers, the eyes 127 for guiding the additional warp yarns and the eyes 109 for guiding the lathe yarns are located, in turn, in the plane of each of the two layers 181, 183 of the crowd ( Figure 16).
  • a first normal pick 185 is inserted into the shed under the additional warp thread 104, the tongues 103 being at this time in the high position, while at the same time , the bars 107A, 107B are in the low position below the pick and the tower threads 108 in crossing position one over the other.
  • the tongues 103 descend while the bars 107A, 107B rise in synchronism with the crowd, and spread the turn wires 108 as far as possible to allow passage to the tongues 103 which bring down the additional warp threads 104 between the turn son.
  • Another pick 185 is then inserted and the cycle described above starts again, the same location of the turn threads 108 is found only every four picks 185.
  • the additional warp threads 104 and the turn threads 108 are located alternately au- above and below successive normal picks 185.
  • a complete cycle of the false selvedge with gauze pitch extends over a formation time of four crowds, that is to say over four cycles of the weaving machine, while the false selvedge of FIG.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP84401268A 1983-07-08 1984-06-20 Vorrichtung zum Herstellen einer Dreherfachleiste in Webmaschinen Expired EP0131495B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8311409A FR2548694B1 (fr) 1983-07-08 1983-07-08 Dispositif d'execution d'une fausse lisiere a pas de gaze sur machine a tisser
FR8311409 1983-07-08

Publications (2)

Publication Number Publication Date
EP0131495A1 true EP0131495A1 (de) 1985-01-16
EP0131495B1 EP0131495B1 (de) 1987-04-22

Family

ID=9290652

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Application Number Title Priority Date Filing Date
EP84401268A Expired EP0131495B1 (de) 1983-07-08 1984-06-20 Vorrichtung zum Herstellen einer Dreherfachleiste in Webmaschinen

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US (1) US4580605A (de)
EP (1) EP0131495B1 (de)
DE (1) DE3463280D1 (de)
FR (1) FR2548694B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5392819A (en) * 1993-12-10 1995-02-28 Hunshin Enterprise Co., Ltd. Planetary gear type selvage forming and cord catching device for loom
DE19654962A1 (de) * 1996-12-12 1998-06-18 Dornier Gmbh Lindauer Halte- und Positioniereinrichtung für eine Dreherkantenvorrichtung in Webmaschinen
GB2426253B (en) * 2005-05-20 2009-11-25 Griffith Textile Mach Ltd Apparatus and a method for weaving leno fabric
BR112015006014A2 (pt) * 2012-09-27 2017-07-04 Toray Industries tecido tramado e processo para a produção
KR101510671B1 (ko) 2014-03-28 2015-04-09 신한화섬(주) 직기의 경사지지장치
GB2571563B (en) * 2018-03-01 2023-01-04 Dewhurst James Ltd Woven textile and associated method of manufacture

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR470708A (fr) * 1914-04-09 1914-09-26 Fiedler & C Gesellschaft Mit Beschraenkter Haftung Appareil pour produire les entre-bandes des pièces d'étoffe
FR1230808A (fr) * 1958-07-12 1960-09-20 Sdruzeni Podniku Textilniho St Dispositif pour la formation de lisière
FR1563842A (de) * 1968-01-18 1969-04-18
DE2442914A1 (de) * 1974-03-01 1975-09-04 Vandewiele Fond Atel Vorrichtung zur herstellung falscher webraender auf einer seite eines doppelgewebes auf einem doppelwebstuhl ohne schiffchen
US3952778A (en) * 1975-04-28 1976-04-27 Rockwell International Corporation Selvage forming device
FR2390524A1 (fr) * 1977-05-13 1978-12-08 Rueti Ag Maschf Dispositif servant a former un lisere de gaze sur les metiers a tisser

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS158466B1 (de) * 1972-06-12 1974-11-25

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR470708A (fr) * 1914-04-09 1914-09-26 Fiedler & C Gesellschaft Mit Beschraenkter Haftung Appareil pour produire les entre-bandes des pièces d'étoffe
FR1230808A (fr) * 1958-07-12 1960-09-20 Sdruzeni Podniku Textilniho St Dispositif pour la formation de lisière
FR1563842A (de) * 1968-01-18 1969-04-18
DE2442914A1 (de) * 1974-03-01 1975-09-04 Vandewiele Fond Atel Vorrichtung zur herstellung falscher webraender auf einer seite eines doppelgewebes auf einem doppelwebstuhl ohne schiffchen
US3952778A (en) * 1975-04-28 1976-04-27 Rockwell International Corporation Selvage forming device
FR2390524A1 (fr) * 1977-05-13 1978-12-08 Rueti Ag Maschf Dispositif servant a former un lisere de gaze sur les metiers a tisser

Also Published As

Publication number Publication date
DE3463280D1 (en) 1987-05-27
EP0131495B1 (de) 1987-04-22
FR2548694A1 (fr) 1985-01-11
US4580605A (en) 1986-04-08
FR2548694B1 (fr) 1985-11-29

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