EP0115238A2 - Fly and dust guard system for the spring of a weft gripper - Google Patents

Fly and dust guard system for the spring of a weft gripper Download PDF

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Publication number
EP0115238A2
EP0115238A2 EP83402538A EP83402538A EP0115238A2 EP 0115238 A2 EP0115238 A2 EP 0115238A2 EP 83402538 A EP83402538 A EP 83402538A EP 83402538 A EP83402538 A EP 83402538A EP 0115238 A2 EP0115238 A2 EP 0115238A2
Authority
EP
European Patent Office
Prior art keywords
spring
weft
dust
fly
flexible material
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Withdrawn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
EP83402538A
Other languages
German (de)
French (fr)
Other versions
EP0115238A3 (en
Inventor
Olivier Traynard
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.)
Filing date
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 EP0115238A2 publication Critical patent/EP0115238A2/en
Publication of EP0115238A3 publication Critical patent/EP0115238A3/en
Withdrawn legal-status Critical Current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
    • D03D47/12—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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J5/00—Shuttles
    • D03J5/06—Dummy shuttles; Gripper shuttles

Definitions

  • the invention relates to the protection, against fluff and dust, of a spring mounted in a needle head for the insertion of a weft thread in a loom.
  • needles In weaving on loom without shuttle, needles allow the insertion of a weft thread.
  • the head of the needle can be considered as a forceps composed of a body and a movable branch pinching one against the other by their free end under the action of a spring.
  • This spring is adjustable to allow pinching and transfer of the weft with a minimum of effort to be exerted on the wire. This is why a helical spring is most often used, the precompression of which can be adjusted by means of a screw.
  • the body itself can have different shapes, in most cases it is wide open at least on one side, while the other sides are generally pierced with holes in order to lighten the needle head as much as possible.
  • a boss belonging to the body is provided for fixing a twig making clamp with a part of the body to hold the frame during insertion into the crowd.
  • the thread is introduced between the body of the needle and its clamp by its own tension, while for the needle called positive, the clamp is opened by a command, the wire is introduced and the clamp closes on the wire. Frequent maintenance of the spring is necessary for proper operation.
  • the weaving machines by their continuous crossing of the threads, deposit on all the parts of the machine, an important layer of down.
  • the outside of the needle head is at each exit from the crowd rubbed by the crossing threads, the down can not be fixed there, but it is different for the inside of the head needle. Little by little all the cavities and the spring are stuffed with down, the movement of the branch which is controlled gives the spring a regular back and forth which compacts the down more and more, reducing the stroke of the clamp and, in consequence, its opening. At this time, cleaning of the needle head is necessary.
  • the object of the present invention is to remedy these drawbacks by isolating the spring from the down.
  • the subject of the invention is a system for protecting the helical spring of the weft needle heads against fluff and dust in a weaving loom, characterized in that at least one external or internal surfaces of the turns
  • the preferred embodiment of the invention consists in enclosing the spring in a flexible plastic tube and thus isolating it entirely from the external environment.
  • the invention solves the problem of cleaning the region of the location of the spring and the volume occupied by it. ,
  • the invention also relates to the weft needle heads whose spring is equipped with such a protection system.
  • FIG. 1 represents a conventional needle head 1 composed of a body 2 and a movable branch 3 freely mounted for rotation by a journal 4.
  • the branch 3 has a heel 5 allowing it, by means of a fixed or mobile control member not shown, to pivot around the pin 4 and to open the inlet 6 for positioning and pinching the weft thread after erasing the control member.
  • a helical spring 7, adjustable by a screw 8, keeps the branch 3 always against the body 2.
  • a sleeve 9, made of flexible elastomer material is fitted on the outer surface of the turns of the spring 7.
  • This sleeve 9 is supported, on the one hand, on the inner face of the body 2 and, on the other hand, on the opposite face of the movable small branch 3.
  • This sleeve therefore protects, against dust, the entire volume encompassed by the spring and, thanks to its flexibility, it allows correct operation of the spring, permanently, without the need for cleaning.
  • a flexible plug 10 is fitted inside the spring 7 to prevent the down from accumulating there.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Knitting Machines (AREA)

Abstract

The invention relates to the weaving industry. The spring (7) of the weft needle gripper (1, 2, 3) of a loom is covered by a flexible sleeve (9) which prevents the deposition of dust on and in the spring. The system makes it possible to avoid abnormal operation of weft grippers caused by the accumulation of dust in their return springs. <IMAGE>

Description

L'invention concerne la protection,contre le duvet et la poussière, d'un ressort monté dans une tête d'aiguille pour l'insertion d'un fil de trame dans un métier à tisser.The invention relates to the protection, against fluff and dust, of a spring mounted in a needle head for the insertion of a weft thread in a loom.

Dans le tissage sur métier sans navette, des aiguilles permettent l'insertion d'un fil de trame. La tête de l'aiguille peut être considérée comme une pince composée d'un corps et d'une branchette mobile se pinçant l'un contre l'autre par leur bout libre sous l'action d'un ressort. Ce ressort est réglable pour permettre le pincement et le transfert de la trame avec un minimum d'efforts à exercer sur le fil. C'est pourquoi on utilise le plus souvent un ressort hélicoïdal dont la précompression peut être réglée au moyen d'une vis.In weaving on loom without shuttle, needles allow the insertion of a weft thread. The head of the needle can be considered as a forceps composed of a body and a movable branch pinching one against the other by their free end under the action of a spring. This spring is adjustable to allow pinching and transfer of the weft with a minimum of effort to be exerted on the wire. This is why a helical spring is most often used, the precompression of which can be adjusted by means of a screw.

Le corps lui-même peut avoir différentes formes, dans la plupart des cas il est largement ouvert au moins sur un côté, tandis que les autres côtés sont en général percés de trous dans le but d'alléger au maximum la tête d'aiguille. Un bossage appartenant au corps est prévu pour la fixation d'une branchette faisant pince avec une partie du corps pour tenir la trame pendant l'insertion dans la foule.The body itself can have different shapes, in most cases it is wide open at least on one side, while the other sides are generally pierced with holes in order to lighten the needle head as much as possible. A boss belonging to the body is provided for fixing a twig making clamp with a part of the body to hold the frame during insertion into the crowd.

Il existe des aiguilles avec pince négative et pince positive, les deux exécutions sont soumises à l'action d'un ressort.There are needles with negative clamp and positive clamp, both versions are subject to the action of a spring.

Pour l'aiguille à pince appelée négative, le fil est introduit entre le corps de l'aiguille et de sa pince par sa propre tension, tandis que pour l'aiguille appelée positive, la pince est ouverte par une commande, le fil est introduit et la pince se referme sur le fil. Un entretien fréquent du ressort est nécessaire pour son fonctionnement correct.For the needle called negative, the thread is introduced between the body of the needle and its clamp by its own tension, while for the needle called positive, the clamp is opened by a command, the wire is introduced and the clamp closes on the wire. Frequent maintenance of the spring is necessary for proper operation.

Les machines à tisser par leur croisement continuel des fils, déposent sur toutes les parties de, la machine une importante couche de duvet.The weaving machines by their continuous crossing of the threads, deposit on all the parts of the machine, an important layer of down.

L'extérieur de la tête de l'aiguille est à chaque sortie de la foule frotté par les fils de chaîne qui se croisent, le duvet ne peut donc pas s'y fixer,mais il en est autrement pour l'intérieur de la tête d'aiguille. Petit à petit toutes les cavités et le ressort sont bourrés de duvet, le mouvement de la branchette qui est commandée imprime au ressort un va-et-vient régulier qui compacte de plus en plus le duvet, réduisant la course de la pince et, en conséquence, son ouverture. A ce moment, un nettoyage de la tête d'aiguille est nécessaire.The outside of the needle head is at each exit from the crowd rubbed by the crossing threads, the down can not be fixed there, but it is different for the inside of the head needle. Little by little all the cavities and the spring are stuffed with down, the movement of the branch which is controlled gives the spring a regular back and forth which compacts the down more and more, reducing the stroke of the clamp and, in consequence, its opening. At this time, cleaning of the needle head is necessary.

La présente invention a pour but de remédier à ces inconvénients en isolant le ressort du duvet.The object of the present invention is to remedy these drawbacks by isolating the spring from the down.

On connaît un brevet suisse No. 472.524 qui décrit une protection par une matière souple synthétique pour éviter le remplissage des cavités par le duvet, et supprimer le nettoyage, mais la protection d'un ressort hélicoïdal n'est pas envisagée.We know a Swiss patent No. 472.524 which describes a protection by a flexible synthetic material to avoid filling the cavities with down, and eliminate cleaning, but the protection of a helical spring is not envisaged.

L'invention a pour objet un système de protection, contre le duvet et la poussière, du ressort hélicoïdal des têtes d'aiguilles passe-trame, dans un métier à tisser, caractérisé en ce que l'une au moins des surfaces extérieures ou intérieures des spiresThe subject of the invention is a system for protecting the helical spring of the weft needle heads against fluff and dust in a weaving loom, characterized in that at least one external or internal surfaces of the turns

du ressort est recouverte par un élément en matière élastomère souple présentant une souplesse suffisante pour ne pas modifier sensiblement les caractéristiques élastiques dudit ressort.of the spring is covered by an element made of flexible elastomer material having sufficient flexibility so as not to substantially modify the elastic characteristics of said spring.

La réalisation préférée de l'invention consiste à enfermer le ressort dans un tube en matière plastique souple et à l'isoler ainsi entièrement de l'environnement extérieur.The preferred embodiment of the invention consists in enclosing the spring in a flexible plastic tube and thus isolating it entirely from the external environment.

L'invention résout le problème du nettoyage de la région de l'emplacement du ressort et du volume occupé par celui-ci. ,The invention solves the problem of cleaning the region of the location of the spring and the volume occupied by it. ,

L'invention vise également les têtes d'aiguilles passe-trame dont le ressort est équipé d'un tel système de protection.The invention also relates to the weft needle heads whose spring is equipped with such a protection system.

L'invention sera mieux comprise à l'aide de la description et des dessins représentant deux modes d'exécution.

  • La figure 1 représente une coupe partielle d'une tête d'aiguille montrant l'emplacement du ressort et son manchon de protection.
  • La figure 2 montre une protection avec un bouchon souple à l'intérieur du ressort.
The invention will be better understood using the description and the drawings representing two embodiments.
  • Figure 1 shows a partial section of a needle head showing the location of the spring and its protective sleeve.
  • Figure 2 shows a protection with a flexible plug inside the spring.

La figure 1 représente une tête d'aiguille classique 1 composée d'un corps 2 et d'une branchette mobile 3 montée libre en rotation par un tourillon 4. La branchette 3 possède un talon 5 lui permettant, par l'intermédiaire d'un organe de commande fixe ou mobile non représenté, de pivoter autour du tourillon 4 et d'ouvrir l'entrée 6 pour le positionnement et le pincement du fil de trame après effacement de l'organe de commande.FIG. 1 represents a conventional needle head 1 composed of a body 2 and a movable branch 3 freely mounted for rotation by a journal 4. The branch 3 has a heel 5 allowing it, by means of a fixed or mobile control member not shown, to pivot around the pin 4 and to open the inlet 6 for positioning and pinching the weft thread after erasing the control member.

Un ressort hélicoïdal 7, réglable par une vis 8, maintient la branchette 3 toujours contre le corps 2.A helical spring 7, adjustable by a screw 8, keeps the branch 3 always against the body 2.

Le duvet et la poussière ont tendance à s'accumuler tout autour du ressort 7, à l'intérieur de celui-ci et entre ses spires. Petit à petit, la poussière tend à entraver le libre jeu du ressort, ce qui produit un mauvais fonctionnement de la pince.The down and the dust tend to accumulate all around the spring 7, inside of it and between its turns. Little by little, the dust tends to hinder the free play of the spring, which produces a malfunction of the clamp.

Suivant la forme de réalisation de l'invention représentée sur la figure 1, un manchon 9, en matière élastomère souple est emmanché sur la surface extérieure des spires du ressort 7. Ce manchon 9 prend appui, d'une part, sur la face intérieure du corps 2 et, d'autre part, sur la face en regard de la branchette mobile 3. Ce manchon protège donc, contre la poussière, tout le volume englobé par le ressort et, grâce à sa souplesse, il permet un fonctionnement correct du ressort, de façon durable, sans nécessiter de nettoyage.According to the embodiment of the invention shown in Figure 1, a sleeve 9, made of flexible elastomer material is fitted on the outer surface of the turns of the spring 7. This sleeve 9 is supported, on the one hand, on the inner face of the body 2 and, on the other hand, on the opposite face of the movable small branch 3. This sleeve therefore protects, against dust, the entire volume encompassed by the spring and, thanks to its flexibility, it allows correct operation of the spring, permanently, without the need for cleaning.

Suivant la forme de réalisation de l'invention représentée sur la figure 2, un bouchon souple 10 est emmanché à l'intérieur du ressort 7 pour empêcher le duvet de s'y accumuler.According to the embodiment of the invention shown in Figure 2, a flexible plug 10 is fitted inside the spring 7 to prevent the down from accumulating there.

Bien entendu on peut prévoir à la fois le manchon extérieur (prévu sur la figure 1) et le bouchon intérieur (figure 2), mais, dans ce cas, il est encore plus avantageux d'insérer par moulage le volume complet englobé par le ressort dans une matière souple permettant, sans résistance appréciable supplémentaire, un fonctionnement correct du ressort avec une protection totale contre les poussières et le duvet.Of course we can provide both the outer sleeve (provided in Figure 1) and the inner plug (Figure 2), but, in this case, it is even more advantageous to insert by molding the complete volume encompassed by the spring in a flexible material allowing, without appreciable additional resistance, a correct functioning of the spring with a total protection against dust and down.

Claims (5)

1. Système de protection, contre le duvet et la poussière, du ressort hélicoïdal des têtes d'aiguilles passe-trame, dans un métier à tisser, caractérisé en ce que l'une au moins des surfaces extérieures ou intérieures des spires du ressort (7) est recouverte par un élément (9, 10 ) en matière élastomère souple présentant une souplesse suffisante pour ne pas modifier sensiblement les caractéristiques élastiques dudit ressort.1. Protection system, against fluff and dust, of the helical spring of the weft needle heads, in a loom, characterized in that at least one of the external or internal surfaces of the coils of the spring ( 7) is covered by an element (9, 10) of flexible elastomer material having sufficient flexibility so as not to substantially modify the elastic characteristics of said spring. 2. Système suivant la revendication 1, caractérisé en ce que l'élément précité est constitué par un bouchon (10) en matière souple introduit à l'intérieur du ressort (7).2. System according to claim 1, characterized in that the aforementioned element consists of a plug (10) made of flexible material introduced inside the spring (7). 3. Système suivant l'une des revendications 1 ou 2, caractérisé en ce que l'élément précité est constitué par un manchon (9) en matière souple emmanché par-dessus le ressort.3. System according to one of claims 1 or 2, characterized in that the aforementioned element consists of a sleeve (9) of flexible material fitted over the spring. 4. Système suivant la revendication 1, caractérisé en ce que l'élément précité est constitué par un enrobage, effectué par moulage, qui recouvre le volume complet englobé par le ressort (7) au moyen d'une matière souple. 4 . System according to claim 1, characterized in that the above-mentioned element consists of a coating, produced by molding, which covers the entire volume encompassed by the spring (7) by means of a flexible material. 5. Tête d'aiguille passe-trame pour métier à tisser, caractérisée en ce qu'elle comporte un système de protection suivant l'une des revendications 1 à 4.5. Weft pass needle head for weaving loom, characterized in that it comprises a protection system according to one of claims 1 to 4.
EP83402538A 1983-01-24 1983-12-27 Fly and dust guard system for the spring of a weft gripper Withdrawn EP0115238A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8300987 1983-01-24
FR8300987A FR2539768A1 (en) 1983-01-24 1983-01-24 SYSTEM FOR PROTECTION, AGAINST DUST AND DUST, OF THE SPRING OF FINGER-HAND NEEDLE HEADS IN A WEAVING

Publications (2)

Publication Number Publication Date
EP0115238A2 true EP0115238A2 (en) 1984-08-08
EP0115238A3 EP0115238A3 (en) 1984-08-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP83402538A Withdrawn EP0115238A3 (en) 1983-01-24 1983-12-27 Fly and dust guard system for the spring of a weft gripper

Country Status (2)

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EP (1) EP0115238A3 (en)
FR (1) FR2539768A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4101905A1 (en) * 1990-01-26 1991-08-08 Nuovo Pignone Spa Weft gripping device for a contactless weaving machine
US5065797A (en) * 1989-07-15 1991-11-19 Lindauer Dornier Gesellschaft M.B.H. Gripper head for shuttleless looms
EP0864679A1 (en) * 1997-03-14 1998-09-16 Sulzer Rüti Ag Gripper clamp for a carrying gripper and loom with a gripper clamp
CN105200628A (en) * 2015-10-30 2015-12-30 湖州织里韩衣童社服饰有限公司 Yarn gripping mechanism on weft insertion sword
CN105239254A (en) * 2015-10-30 2016-01-13 湖州织里韩衣童社服饰有限公司 Rapier loom giver
CN109137238A (en) * 2017-06-15 2019-01-04 意达股份公司 For crawl/release weft yarn improvement system in gripper shuttle loom

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE524186A (en) * 1952-12-11
GB682584A (en) * 1949-02-07 1952-11-12 George Frederick Shotter Improvements in or relating to the damping of springs
FR1035139A (en) * 1951-04-06 1953-08-17 Mixed rubber-steel spring, variable flexibility
FR1553528A (en) * 1967-03-08 1969-01-10
FR2210687A1 (en) * 1972-12-14 1974-07-12 Mackie & Sons Ltd J
FR2316482A1 (en) * 1975-06-20 1977-01-28 Skf Ind Trading & Dev DEFORMABLE ELEMENT FOR SHOCK ABSORBERS, ESPECIALLY FOR SHOCK ABSORBERS OF AUTOMATIC RAIL VEHICLE COUPLING DEVICES

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB682584A (en) * 1949-02-07 1952-11-12 George Frederick Shotter Improvements in or relating to the damping of springs
FR1035139A (en) * 1951-04-06 1953-08-17 Mixed rubber-steel spring, variable flexibility
BE524186A (en) * 1952-12-11
FR1553528A (en) * 1967-03-08 1969-01-10
FR2210687A1 (en) * 1972-12-14 1974-07-12 Mackie & Sons Ltd J
FR2316482A1 (en) * 1975-06-20 1977-01-28 Skf Ind Trading & Dev DEFORMABLE ELEMENT FOR SHOCK ABSORBERS, ESPECIALLY FOR SHOCK ABSORBERS OF AUTOMATIC RAIL VEHICLE COUPLING DEVICES

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5065797A (en) * 1989-07-15 1991-11-19 Lindauer Dornier Gesellschaft M.B.H. Gripper head for shuttleless looms
DE4101905A1 (en) * 1990-01-26 1991-08-08 Nuovo Pignone Spa Weft gripping device for a contactless weaving machine
EP0864679A1 (en) * 1997-03-14 1998-09-16 Sulzer Rüti Ag Gripper clamp for a carrying gripper and loom with a gripper clamp
US6102084A (en) * 1997-03-14 2000-08-15 Sulzer Rueti Ag Rapier clamp
CN105200628A (en) * 2015-10-30 2015-12-30 湖州织里韩衣童社服饰有限公司 Yarn gripping mechanism on weft insertion sword
CN105239254A (en) * 2015-10-30 2016-01-13 湖州织里韩衣童社服饰有限公司 Rapier loom giver
CN109137238A (en) * 2017-06-15 2019-01-04 意达股份公司 For crawl/release weft yarn improvement system in gripper shuttle loom
CN109137238B (en) * 2017-06-15 2021-06-25 意达股份公司 Improved system for gripping/releasing weft threads in gripper weaving machines

Also Published As

Publication number Publication date
FR2539768A1 (en) 1984-07-27
EP0115238A3 (en) 1984-08-29

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