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EP0266286A2 - Vorrichtung zum Schusseintrag bei schützenlosen Webmaschinen - Google Patents

Vorrichtung zum Schusseintrag bei schützenlosen Webmaschinen Download PDF

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Publication number
EP0266286A2
EP0266286A2 EP87420288A EP87420288A EP0266286A2 EP 0266286 A2 EP0266286 A2 EP 0266286A2 EP 87420288 A EP87420288 A EP 87420288A EP 87420288 A EP87420288 A EP 87420288A EP 0266286 A2 EP0266286 A2 EP 0266286A2
Authority
EP
European Patent Office
Prior art keywords
head
weft thread
crowd
heads
opening
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
EP87420288A
Other languages
English (en)
French (fr)
Other versions
EP0266286B1 (de
EP0266286A3 (en
Inventor
Jean Venot
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 Materiel Textile- Samt SA Ste
Original Assignee
Alsacienne De Materiel Textile- Samt SA Ste
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 Alsacienne De Materiel Textile- Samt SA Ste filed Critical Alsacienne De Materiel Textile- Samt SA Ste
Publication of EP0266286A2 publication Critical patent/EP0266286A2/de
Publication of EP0266286A3 publication Critical patent/EP0266286A3/fr
Application granted granted Critical
Publication of EP0266286B1 publication Critical patent/EP0266286B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers

Definitions

  • the present invention relates to a device for the insertion of the weft thread on looms without shuttle, comprising two oscillating lances penetrating into the crowd.
  • a lance is provided on each side of the loom which is pushed into the crowd from the corresponding side and which is then called back.
  • the end of the spears which enters the crowd carries a head which grasps the weft thread to be inserted in the crowd and which guides it during this insertion.
  • the weft thread is extracted from a reserve reel which is placed outside the crowd.
  • the transmission of the wire from the "inlet head” to the “outlet head” takes place automatically thanks to a particular shape of the two heads.
  • the wire is taken up by the “entry head” in a clamp self-pinching.
  • the wire is retained by the "outlet head” in a self-punching hook.
  • the self-tacking hook must catch the wire, wedging it enough to be able to disengage it from the input head.
  • the thread can be released at any time during its insertion because it is insufficiently trapped in one or the other of the two heads, thus causing a weaving defect. It is also impossible to insert more than one weft thread at a time, while for some fabrics it is necessary to insert several. Particles of wire can accumulate in the head at the pinch areas, preventing it from properly performing their function. This results in a sliding of the wire which can thus escape from the head.
  • the invention aims to overcome these drawbacks and relates to an improvement made to the device allowing the insertion of the weft threads on the weaving looms without shuttle, comprising two oscillating lances penetrating inside the crowd from both sides of the loom and this, substantially up to the middle of the width of said loom, the opposite ends of each of said lances being equipped: - one of a so-called "entry head” assembly in the form of a clamp making it possible to take the weft thread to be inserted inside the shed on reserve coils mounted at a fixed station on one side of the loom in order to transport it around the middle crowd in the form of single or multiple thread; - the other, a second assembly called "outlet head", also in the form of pliers making it possible to grasp the wire at the end of the inlet head when the latter is in the middle of the crowd. then pull it from this area to the other edge of the fabric where it is then released.
  • the improvement according to the invention is characterized in that the means enabling the opening and closing of the inlet and outlet heads to be controlled in order to ensure the grip and release of the weft, at least during the transfer phase in the central part of the loom, consist of a mechanism acting on each of the movable branches that each of the heads comprises, this mechanism being located inside the said heads and being actuated by means arranged on each side of the trade, the transmission of the command being carried out inside the crowd without any contact with the warp threads forming said crowd.
  • the means making it possible to control the opening and closing of the branches of the inlet and outlet heads consist of an assembly of the cam and roller type, ramp and roller, ramp / ramp, pusher / ramp., one of the elements being fixedly mounted on the mobile stick, the other being movable on the body of the lance between two positions, one inactive according to which the sticks are held pressed against the body of the lance to ensure the pinching of the wire, the other activates according to which the movable element bears against that mounted on the branch and tends to cause it to open, the movable element being actuated by means acting from the inside of each of the lances.
  • the means for controlling the opening and closing of the inlet and outlet heads are constituted by permanent magnets mounted on the one hand on each of the branches and, on the other hand on the bodies of each lance so as to have in appearance alternately a positive pole and a negative pole, the magnets mounted on the lance being capable of being moved between two positions, one according to which they keep the branch in abutment against the body the lance to pinch, the other that they cause the opening of said branch, the control of the movement of these magnets being provided by means acting from the inside of each of the lances.
  • the movement of the member (roller, cam, ramp, etc.) mounted on the lances is carried out by means of a rod or a wire guided through said lance, this rod or wire comprising a cleat towards their end opposite to the pliers, this cleat coming into contact against stops integral with the loom when the lances are fully deployed inside the crowd and thus actuating the branches of the input heads and output to allow the transfer of the frame from one head to another.
  • a clamping branch control system thanks to such a clamping branch control system, the exchange of wires from one head to the other is therefore perfectly controlled without any foreign body passing through the plies of warp threads constituting the crowd.
  • several weft threads can be pinched simultaneously.
  • the device according to the invention can be used both for ensuring the opening and closing of the branches of the inlet heads and outlet heads both in the central part of the loom during the transfer of the frame one lance to the other than on the sides when the weft is taken up by the inlet head and released by the outlet head, preferably to carry out the weft-taking operations on the side of the reserve and release of the weft thread after insertion, additional means are arranged outside the crowd on each side of the loom.
  • FIG. 1 schematically illustrates, seen from the front, a shuttleless weaving loom equipped with a device for the insertion of the weft thread according to the invention.
  • a drive motor (2) from which are controlled all the movements of the loom.
  • the drive mechanisms (4) of the lances (5) and (7) are controlled, the mechanisms presentation (13) of the frame to the input head (6), the swing boxes (9) which give movement to the comb (10) via the oscillating axis (11) and the levers ( 12), the opening mechanism (16) of the inlet head.
  • Conventional drive mechanisms (4) give the lances (5) and (7) back and forth movement so that they can penetrate inside the crowd from both sides of the loom, substantially to the middle of the width of said loom.
  • the lance (5) carries at its end which enters the crowd a head (6) or "entry head” and the lance (7) a head (8) or "exit head”.
  • the weft thread is always introduced in the form of a single thread and always on the same side of the machine.
  • the weft thread (54) is presented to the input head (6) by a feed or presentation device (13).
  • an opening mechanism (17) whose structure and operation will be seen in more detail in the following description controls the opening of the branch of the input head, so that it can take the weft thread.
  • the mechanism (17) controls the closing of said branch, the core wire being thus pinched by the inlet head (6).
  • the lance (5) continues its advance in the crowd simultaneously with the lance (7) which comes to meet it.
  • the opening and closing mechanisms of the heads (6) and (8) which, according to the invention are included inside said heads, are actuated by control means arranged on each side of the loom and an embodiment of which is illustrated in FIGS. 4a to 4c.
  • these means for controlling the internal mechanism which acts on the movable branch of each of the heads consist of rods (18) and (19) one end of which is connected to the internal mechanism of each head and the other end of which (see fig. 4a to 4c) is connected to lugs (20,21) which, during the displacement of the lances, come into contact against stops (22) and (23) fixedly disposed on each side of the loom.
  • the transmission of the command for the opening of the branches is therefore carried out inside the crowd without any contact with the warp threads forming this crowd.
  • Figures 2 and 2a illustrate an exemplary embodiment of the control of the branches respectively of the inlet head ( Figure 2) and the outlet head ( Figure 2a) according to the invention.
  • the lance (5) is equipped with an inlet head (6) inside which is arranged the mechanism allowing the opening of the branch (24).
  • This mechanism consists of a cleat (20) connected to a rod (18) which slides in a guide (26) mounted in the body of the lance (5).
  • the rod (18) is fixed to a drawer (28) which performs several functions. It provides another guide for the rod (18) and carries a roller (30) which comes to bear on the ramp (32) provided on the branch.
  • the entire control mechanism described below is recalled by a spring (34).
  • FIG. 3 illustrates in more detail a particular structure of this clamping zone (a structure which is similar to that of the outlet head) and which comprises, arranged on the surface of the branch (24), an elastomer strip (38) which is sandwiched between the branch and a steel plate (39). Thanks to such an embodiment and to the flexibility of the elastomer, a perfectly flat nip is obtained between the surface of the head and that of the branch (24).
  • the left lance (7) which is equipped with the outlet head (8) and which is represented in FIG. 2a has a structure and an operation in all points equivalent to that of the right lance (5) carrying the inlet head (6).
  • Figures 4a to 4c illustrate the structure and operation of the device which controls the opening of the branch (24) of the inlet head (6).
  • An identical system is arranged on the left of the loom for controlling the opening of the branch (25) of the outlet head (8).
  • the device for controlling the opening of the twigs for the transfer from one lance to the other in the central part of the loom to also control the opening of said twigs on the sides of the loom to ensure the grip of the weft thread and its release after insertion
  • additional means are provided on each side of the loom to cause opening during the grip and during the release.
  • Figures 5a to 5d illustrate the structure and operation of such means (17) for controlling the opening of the branches at the entrance
  • Figures 6a to 6d illustrating, for their part the structure and operation of a means Similar controlling the opening of the outlet head for the relaxation of the weft threads after insertion.
  • the opening mechanism designated by the general reference (17) for the gripping of the weft thread by the input head essentially comprises an electromagnet (42) which, by through a lever (43), slides on a ramp (44). This ramp (44) is recalled by a spring (45).
  • the lance (5) returns to its initial position at the entrance to the crowd, on the side of the loom, the ramp (44) being held back to allow passage to the roller (46).
  • the lance (5) and, consequently, the inlet head (6) reaches its maximum withdrawal.
  • the electromagnet (42) is then excited so as to cause the displacement of the ramp (44) by acting on the lever (43).
  • the lance (5) is actuated for the insertion of a new wire.
  • a weft thread (54) is presented by a conventional mechanism (13), in order to bring it onto the path of the lance (5).
  • the roller (46) mounted on the branch rests on the ramp (44) and, consequently, causes the opening of the clamping zone (40), the weft thread can therefore be inserted between the part fixed head (6) and movable branch (24).
  • the latter can be subjected to the action of an air jet making it possible to clean it.
  • the opening of the outlet head, for slackening of the weft thread after its insertion is carried out in a similar manner as illustrated in FIGS. 6a to 6d, the control of the opening of the branch (25) equipping the said outlet head (7) also being obtained by means of an electromagnet mechanism (16).
  • roller systems (46) and (32) for the inlet head and (31) and (51) for the outlet head have been described, these rollers resting on ramps in order to cause the opening of the branches
  • any other equivalent means could be used, for example to replace the rollers (30,31) (as represented in FIG. 7a) by a ramp or pad (57) based on material having good resistance to wear and friction.
  • the opening of the branches (24, 25) is obtained by contact between the ramp (57) movable inside the lances and which comes to bear against the ramp (32,33) provided on the branch.
  • said additional rollers (51) for opening the twigs on the sides of the loom when gripping and releasing the weft thread could be replaced by a shoe (56).
  • Figures 9a and 9b illustrate another embodiment of the inlet (6) and outlet (8) heads making it possible to further reduce the number of moving parts.
  • the same references as those used in the example described above denote the same elements.
  • the opening and closing force of the branches is obtained by means of permanent magnets.
  • the magnets which are all designated by the reference (52) are mounted so as to have in appearance alternately a positive pole (55) and a negative pole (53).
  • the same assembly of magnets (52) is carried out on the slide (28) which can be moved relative to the branch (24) (or 25), thus ensuring an attraction or a repulsion according to the desired effect.
  • the drawer (28) is equipped with three permanent magnets (52), two of which for example have the apparent positive pole (55) and the third having the apparent negative pole (53).
  • the spring (34) (or 35) makes it possible to ensure the drawer return (28) (or 29) in the initial position and causes the clamp to close (figure 9a)
  • the operation of the outlet clamp is strictly identical and, for this reason, in figures 9a and 9b, the references also used for this outlet clamp.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP19870420288 1986-10-31 1987-10-27 Vorrichtung zum Schusseintrag bei schützenlosen Webmaschinen Expired - Lifetime EP0266286B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8615436A FR2606040B1 (fr) 1986-10-31 1986-10-31 Dispositif pour l'insertion des fils de trame sur les metiers a tisser sans navette
FR8615436 1986-10-31

Publications (3)

Publication Number Publication Date
EP0266286A2 true EP0266286A2 (de) 1988-05-04
EP0266286A3 EP0266286A3 (en) 1988-09-28
EP0266286B1 EP0266286B1 (de) 1991-12-18

Family

ID=9340562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870420288 Expired - Lifetime EP0266286B1 (de) 1986-10-31 1987-10-27 Vorrichtung zum Schusseintrag bei schützenlosen Webmaschinen

Country Status (4)

Country Link
EP (1) EP0266286B1 (de)
JP (1) JPS63126942A (de)
DE (1) DE3775344D1 (de)
FR (1) FR2606040B1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0309700A1 (de) * 1987-10-02 1989-04-05 Textilma AG Greiferwebmaschine
EP0394749A1 (de) * 1989-04-21 1990-10-31 SOMET SOCIETA' MECCANICA TESSILE S.p.A. Zubringergreifer mit axialem Schieber für schützenlose Webmaschinen
WO1997040218A1 (de) * 1996-04-19 1997-10-30 Picanol N.V. Vorrichtung zum öffnen einer greiferklemme eines greifers einer webmaschine
BE1010195A3 (nl) * 1996-04-19 1998-02-03 Picanol Nv Inrichting en werkwijze voor het openen van een grijperklem.
FR2908426A1 (fr) * 2006-11-15 2008-05-16 Schonherr Textilmaschb Gmbh Dispositif d'insertion de trame,metier a tisser pour tapis equipe d'un tel dispositif et procede de traitement d'un defaut d'insertion de trame dans un tel metier
WO2010142446A1 (en) 2009-06-10 2010-12-16 Picanol N.V. Gripper unit, control system for a gripper unit and weaving machine
EP2594671A1 (de) 2008-05-07 2013-05-22 Picanol Vorrichtung zur Übergabe von Schussfäden an einen Greifer einer Greiferwebmaschine, Greiferwebmaschine und Verfahren zur Übergabe von zwei Schussfäden
ITUB20155478A1 (it) * 2015-11-11 2017-05-11 Pezzoli Miria Dispositivo per l?apertura di un elemento di presa di filo di trama di un telaio a pinza, relativo 5 elemento di presa e metodo di apertura di un tale elemento di presa

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1584680A (en) * 1922-04-11 1926-05-11 F A Whitney Carriage Company Needle loom
US2960117A (en) * 1955-08-05 1960-11-15 Weaving Res & Textile Commissi Weft inserting device for looms
DE1087088B (de) * 1955-08-29 1960-08-11 Victor Marie Joseph Ancet Vorrichtung zum Eintragen des Schussfadens bei schuetzenlosen Webmaschinen
ES291993A1 (es) * 1963-09-19 1963-11-16 Balaguer Golobart Ramen Perfeccionamiento de sujeciën y arrastre de hilos de trama
FR1598258A (de) * 1968-12-03 1970-07-06
FR2172843A2 (en) * 1972-02-24 1973-10-05 Alsacienne Constr Meca Gripper jaw - for weft picking needle of shuttle-less loom is cam actuated

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0309700A1 (de) * 1987-10-02 1989-04-05 Textilma AG Greiferwebmaschine
US4949762A (en) * 1987-10-02 1990-08-21 Textilma Ag Weft gripper for shuttleless loom
EP0394749A1 (de) * 1989-04-21 1990-10-31 SOMET SOCIETA' MECCANICA TESSILE S.p.A. Zubringergreifer mit axialem Schieber für schützenlose Webmaschinen
WO1997040218A1 (de) * 1996-04-19 1997-10-30 Picanol N.V. Vorrichtung zum öffnen einer greiferklemme eines greifers einer webmaschine
BE1010195A3 (nl) * 1996-04-19 1998-02-03 Picanol Nv Inrichting en werkwijze voor het openen van een grijperklem.
FR2908426A1 (fr) * 2006-11-15 2008-05-16 Schonherr Textilmaschb Gmbh Dispositif d'insertion de trame,metier a tisser pour tapis equipe d'un tel dispositif et procede de traitement d'un defaut d'insertion de trame dans un tel metier
EP1923495A1 (de) * 2006-11-15 2008-05-21 SCHÖNHERR Textilmaschinenbau GmbH Schussfadeneintragsvorrichtung, Teppichwebmachine mit einer solchen Vorrichtung und Verfahren zur Verarbeitung eines Schussfadenseintragsfehlers in einer solchen Webmachine
CN101200836B (zh) * 2006-11-15 2011-12-14 圣豪纺织机械有限公司 引纬设备、设有该设备的地毯织机及其引纬失误处理方法
EP2594671A1 (de) 2008-05-07 2013-05-22 Picanol Vorrichtung zur Übergabe von Schussfäden an einen Greifer einer Greiferwebmaschine, Greiferwebmaschine und Verfahren zur Übergabe von zwei Schussfäden
WO2010142446A1 (en) 2009-06-10 2010-12-16 Picanol N.V. Gripper unit, control system for a gripper unit and weaving machine
ITUB20155478A1 (it) * 2015-11-11 2017-05-11 Pezzoli Miria Dispositivo per l?apertura di un elemento di presa di filo di trama di un telaio a pinza, relativo 5 elemento di presa e metodo di apertura di un tale elemento di presa
WO2017081712A3 (en) * 2015-11-11 2017-06-15 P.T.M.T. S.R.L. Device for opening a gripping element of weft yarn of a gripper loom, related gripping element and method for opening such gripping element

Also Published As

Publication number Publication date
FR2606040A1 (fr) 1988-05-06
EP0266286B1 (de) 1991-12-18
JPS63126942A (ja) 1988-05-30
FR2606040B1 (fr) 1988-12-02
DE3775344D1 (de) 1992-01-30
EP0266286A3 (en) 1988-09-28

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