EP1096049A1 - Device and assembly for fixing Jacquard-harness springs and loom with such an assembly - Google Patents

Abstract

The harness springs (50), at a Jacquard loom, are integrated on a frame (4) by an assembly (1) of units (40), each with a shaft (42) each linked (43) to a spring (50) and fitted to a common base (41). The base (41) has hooks (414,415) to work with hook ends (22b,32b) in an elastic locking/unlocking action along at least one elongated profile (2b,3b). The base (41) is flat, and can be moved at right angles to the longitudinal line of the profiles (2b,3b). The shafts (42) are deployed along the main plane of the base (41). The base (41) has an opening (413) through it, forming a handgrip on the units (40). The hooks (414,415) and the hook ends (22b,32b) are aligned so that their contact surfaces are contained within the thickness of the base (41). The base (41) has at least one manipulator, which defines a reception zone for a section of the unlocking tool (60) of the unit (40) in relation to the elongated profile (2b,3b). At least one positioning tongue works with a guide (70,71) integrated into the elongated profile (2b,3b). The guide is a lateral rule (70,71) to be locked at the profile, with reception zones for a part of the base (41), and a given offset along the longitudinal line of the profiles (2b,3b).

Description

The invention relates to a device for securing springs associated with a loom type harness Jacquard on a frame of such a trade, to a set of joining together comprising such a device and to a loom weave of Jacquard type comprising such an assembly.

In a known manner, each hook of a Jacquard mechanism is associated with one or more cords, the cords constituting together the mechanical harness. Each cord is connected at the upper end of a heald provided with a grommet control of the position of a trade chain wire according to a generally vertical direction. The lower end of each boom is connected to an anchor point, fixed relative to to the frame of the trade, thanks to a spring allowing to exercise a elastic return force on the arm.

It is known, for example from EP-A-0 678 603, to produce a device for connecting the lower end of a coil spring and frame of a loom by means of a nozzle threaded to be screwed into the coils of the spring and comprising two elastic branches suitable for cooperating with the turns of the spring in order to generate friction avoiding the resonance of it. This document provides for a fixation individual connection device on the frame by means a harpoon-shaped tip, which requires handling long and tedious and makes the equipment more expensive a Jacquard loom with devices of this type. In the event of disassembly, each end piece must be dismantled individually and it is not uncommon to deteriorate end caps.

It is known, for example from DE-U-86 09665, to group connecting devices on a base extending by a rod fitted with a harpoon-shaped head for its hanging on a plank. These devices are difficult to pick up and cannot be implanted with high density, especially on an elongated profile.

We could consider grouping the link devices, for example in sets of four on a base having a central hole in which a bar is inserted supported above the frame. Although it has advantages compared to the technique known from EP-A-0 678 603, this system and that known from DE-U-86 09 665 impose to remove a large number of bar devices to access a device to be exchanged during a maintenance, which turns out to be long, tedious and expensive makes compulsory use of a highly skilled workforce qualified. In the same way, the assembly of a loom incorporating this device is complex. In addition, fluff tends to accumulate between devices of this type and cleaning them is delicate.

It is to these disadvantages that we hear more particularly remedy the invention by proposing a securing device of springs which includes several rods each equipped connecting means with a spring and integral with a base common. This device is characterized in that the base is provided with hooks each capable of cooperating with a spout corresponding shape for hooking and unhooking elastic of this device on at least one elongated profile.

Thanks to the invention, the attachment formed by the base and the different rods it supports can be installed from particularly fast on the profile and dismantled also quickly, without the need for mounting or concomitant disassembly of neighboring fasteners. The different rods of a device can be assembled and disassembled by group in relation to the loom. Flexible hooks and the spouts allow hooking and unhooking fast elastic bands on the elongated profile (s).

• L'embase est globalement plane et apte à être disposée selon une direction globalement perpendiculaire à une direction longitudinale du profilé. Le caractère plan de l'embase permet de juxtaposer les attaches selon la direction longitudinale du profilé avec une grande densité des tiges destinées à coopérer avec les ressorts du harnais. On peut prévoir que tous les ressorts d'une même colonne situés dans la profondeur d'empoutage sont regroupés sur une même attache disposée selon la direction d'avance des fils de chaíne, alors que le profilé s'étend selon une direction globalement parallèle aux fils de trame.
• Les tiges sont juxtaposées essentiellement selon un plan principal de l'embase. En d'autres termes, les tiges forment une nappe globalement plane prolongeant l'embase.
• L'embase est percée d'un orifice central constituant une poignée de prise en main du dispositif, par exemple pour sa mise en place sur un profilé.
• Les crochets et les becs sont orientés de telle sorte que leurs surfaces de contact respectives sont comprises dans l'épaisseur de l'embase, ce qui permet de juxtaposer les embases, et par voie de conséquence les tiges, avec une grande densité.
• L'embase comprend au moins une patte de manoeuvre définissant une zone de réception d'une partie d'un outil de décrochage du dispositif par rapport au profilé allongé.
• Le dispositif comprend au moins une languette de positionnement apte à coopérer avec un organe de guidage solidaire du profilé allongé. Cette languette et cet organe permettent de disposer les différents dispositifs avec un pas prédéterminé défini par cet organe.

According to advantageous but not compulsory aspects of the invention, the device incorporates one or more of the following characteristics:

• The base is generally flat and able to be arranged in a direction generally perpendicular to a longitudinal direction of the profile. The flat nature of the base makes it possible to juxtapose the fasteners in the longitudinal direction of the profile with a high density of the rods intended to cooperate with the springs of the harness. It can be expected that all the springs of the same column located in the deep drawing are grouped on the same fastener arranged in the direction of advance of the chain son, while the profile extends in a direction generally parallel to weft yarn.
• The rods are juxtaposed essentially along a main plane of the base. In other words, the rods form a generally flat sheet extending the base.
• The base is pierced with a central orifice constituting a handle for taking hold of the device, for example for its positioning on a profile.
• The hooks and the spouts are oriented so that their respective contact surfaces are included in the thickness of the base, which makes it possible to juxtapose the bases, and consequently the rods, with a high density.
• The base comprises at least one operating tab defining a zone for receiving a part of a device for detaching the device from the elongated profile.
• The device comprises at least one positioning tab able to cooperate with a guide member integral with the elongated profile. This tongue and this member make it possible to arrange the various devices with a predetermined pitch defined by this member.

The invention also relates to a connection assembly springs of a Jacquard type harness which includes several devices as previously described and at minus an elongated section integral with the frame of the loom and defining, in a cross section, at least one spout able to cooperate with the attachment means provided on these devices. It can also be provided that at least one spacer strip is immobilized on the profile and provided of reception areas for part of the bases of these devices, with a predetermined spacing according to the longitudinal direction of the profile.

The invention finally relates to a loom of the type Jacquard comprising a set as previously described. Such a loom is relatively easy to assemble and to maintain, while being as efficient as the trades known, its cost price and maintenance cost being significantly reduced compared to known trades.

• La figure 1 est une représentation schématique de principe de la partie inférieure d'un métier à tisser en cours d'équipement avec un ensemble de solidarisation de ressorts conforme à l'invention ;
• La figure 2 est une coupe selon la ligne II-II à la figure 1 ;
• La figure 3 est une vue à plus grande échelle du détail III à la figure 2 ;
• La figure 4 est une vue à plus grande échelle du détail IV à la figure 2 ;
• La figure 5 est une vue à plus grande échelle du détail V à la figure 2 et
• la figure 6 est une vue de face d'un dispositif conforme à un second mode de réalisation de l'invention.

The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of two embodiments of a securing device in accordance with its principle, given solely by way of example and made with reference to the accompanying drawings in which:

• Figure 1 is a schematic representation of the principle of the lower part of a weaving loom in the course of equipment with a set of securing springs according to the invention;
• Figure 2 is a section along line II-II in Figure 1;
• Figure 3 is an enlarged view of detail III in Figure 2;
• Figure 4 is an enlarged view of detail IV in Figure 2;
• Figure 5 is an enlarged view of detail V in Figure 2 and
• Figure 6 is a front view of a device according to a second embodiment of the invention.

The assembly 1 shown in Figures 1 and 2 includes two rails 2 and 3 formed by aluminum profiles and mounted on the lower frame 4 of a weaving loom with several threaded rods, only one of which appears in Figures 1 and 2 with the reference 5. The frame 4 is sometimes called "ground" of the trade, the term frame signifying that the element 4 is a fixed part belonging to the structure of the trade. Each threaded rod 5 is associated with plates 6 forming clamps and immobilizing the lower wings 2 a and 3 has rails 2 and 3. The rails 2 and 3 extend in a direction XX 'generally perpendicular to the direction γ-Y 'of progression of the warp threads in the trade, the direction XX' thus being generally parallel to the direction of introduction of the weft threads into the crowd.

Spacers are arranged between rails 2 and 3 and keep their spacing at a value substantially constant. A single spacer 7 is visible but the spacers are distributed along the length of rails 2 and 3. Screws 8 cooperate with captive nuts 9 distributed over the length of the rails or profile 2 and 3 to immobilize these sections with respect to spacers 7 and the like.

The upper part 2 b of the rail 2 constitutes an elongated profile formed by two branches 21 and 22 defining between them a longitudinal channel 23. The external branch 21 is provided with a longitudinal groove 21 a while the internal branch 22 is provided with a longitudinal groove 22 a . The end part 22 b of the tab 22 forms a beak or hook oriented towards the outside of the space defined between the rails 2 and 3.

Similarly, the upper part 3b of the rail 3 constitutes an elongated section of two branches 31 and 32 defining therebetween a channel 33, these legs 31 and 32 each being provided with a longitudinal groove 31a, respectively 32, while the branch 32 forms a beak or hook 32 b in its terminal part.

Several fasteners 40 are provided to be distributed over the assembly formed by the two rails 2 and 3 in the direction XX 'while cooperating with the sections 2b and 3b . Each fastener 40 is formed of a base 41 and thirty-two rods 42 whose free or upper end 42 a is provided to engage in the internal volume of a spring 50 of helical type. A single spring 50 is shown in the figures, however each rod 42 is designed to cooperate with a spring.

The end 42 a of each rod 42 is provided with a net 43 provided to cooperate with the turns of the corresponding spring 50 and two divergent branches 44 intended to rub against the internal surface of the spring 50. Other geometries can be envisaged for the securing means 43 and 44 provided at the end 42 a of each rod 42, in accordance with the respective technical teachings of FR-A-2 766 501 and EP-A-0 678 603 or according to other approaches.

The base 41 and the rods 42 form a single piece produced by plastic injection molding, such as than polyamide (PA) or polyoxymethylene (POM).

The base 41 is generally flat. The plane of symmetry of each fastener 40 is also the plane of symmetry of the base 41 and the rods 42 of such a fastener. The thickness e of each base 40 perpendicular to its plane of symmetry is relatively small, that is to say less than 5 mm and preferably of the order of 2 mm.

The upper edge 411 of the base 41 is substantially straight and perpendicular to the rods 42.

The lower edge 412 of the base 41 is rounded and convex, so that it can be engaged between the branches 22 and 32, above the spacers 7, the material of the base 41 giving sufficient rigidity to the fastener 40. In its central part, the base 41 is pierced with an orifice 413 constituting a grip handle for the fastener 40, in particular when the springs 50 are placed on the ends 42 has rods 42.

The base 41 also carries two elastic hooks 414 and 415 intended to cooperate with the beaks or hooks 22 b and 32 b of the branches 22 and 32 for an elastic attachment of each fastener 40 on the sections 2 b and 3 b . An elastic attachment can be obtained thanks to the elastically deformable nature of the hooks 414 and 415 which are made of plastic material since they are in one piece with the base 41.

The geometry of the hooks 414 and 415 and of the spouts 22 b , 32 b is such that the contact surfaces 414 a , 22 c , 415 a and 32 c of these hooks and spouts are located in the thickness of the base 41 when it is in place. The fasteners 40 can therefore be juxtaposed on the rails 2 and 3 with a high density.

The base 41 also extends by two handles 416 and 417 outside the hooks 414 and 415 relative to the orifice 413. The hook 414 and the handle 416 are separated by a clearance slot 420 while the hook 415 and the handle 417 are separated by a similar slot 421. The handles 416 and 417 each define an area 416 a or 417 a for receiving a tool 60, shown only in phantom in Figure 2, allowing to exert a force F for unhooking the hooks 414 and 415 engaged on the spouts 22 b and 32 b .

In the example shown in Figure 2, the character flexible hook 414 is used to allow a unhooking the hook 415 relative to the spout or hook 32b. Of course, the tool 60 could be used on the handle 416 to allow a stall in the opposite direction.

The fact that a handle 416 or 417 is provided for each side of the base 41 allows an operation for the stall of the clip 40, including when it is accessible by only one side and regardless of its mounting direction.

The handles 416 and 417 are extended respectively by tongues 418 and 419 intended to penetrate into orifices 70 a and 71 a of two guide bars 70 and 71 arranged respectively in the channels 23 and 33 while being slid in the grooves 21 a and 22a, respectively 31a and 32a. The pitch p of the orifices 70 a and 71 a on the bars 70 and 71 determines the pitch of installation of the bars 40 on the rails 2 and 3. This pitch is chosen slightly greater than the thickness e of the fasteners 40.

As shown in Figure 1, when it is necessary to add a fastener 40 on the rails 2 and 3, this fastener is arranged above the rails by being moved in a direction generally parallel to its main plane, as shown by the displacement arrow D, then pressed towards the plates 6, the rounded shape of the hooks 414 and 415 cooperating with the also rounded shape of the spouts 22 b and 32 b to allow automatic hooking by elastic deformation of these hooks. Each fastener 40 is thus arranged with its main plane parallel to the direction Y-Y '. The adjustment in the direction XX 'is carried out by relying on the pitch of the orifices 70 a and 71 a .

Disassembly takes place using the tool 60 as indicated above, especially when one of the stems is damaged. The disassembly can also be done by hand, by exercising a tensile force on one of the handles 416 or 417 or on another part of the base 41.

In the second embodiment of the invention shown in Figure 6, elements similar to those of the first embodiment bear identical references. The clip 40 of this embodiment is intended to be mounted on a profile of the type formed by the rails 2 and 3 shown in Figures 1, 2, 4 and 5. This clip differs from the previous in that the rods 42 are substantially shorter than those of the first embodiment and in that their ends 42a are devoid of branches.

The hooks 414 and 415 are respectively formed at the end of two legs 41 'and 41' 'extending from the base 41 opposite the edge 411. The handles 416 and 417 for operating the hooks 414 and 415 are also provided on these legs 411 'and 411' ', so that it is not formed slot separating these hooks and these handles as in the first embodiment. The bending movements of 41 'and 41' 'tabs allow hooking and unhooking elastic hooks 414 and 415 on the corresponding spouts of the profile.

Positioning tabs 418 and 419 are also provided in the lower part of legs 41 'and 41' ' and are intended to cooperate with spacer bars of the type of bars 70 and 71 described with reference to first embodiment. These tabs 418 and 419 can have a thickness different from that of the rest of the legs 41 'and 41' '.

A crowd training device equipped with a assembly as shown in Figure 1 is easy to install on a loom when it is particularly reliable and that its maintenance is greatly simplified compared to devices of the state of the art. A loom equipped with such a device is therefore of lower installation cost and maintenance than the known trades.

The geometry of the spouts 414 and 415 and of the hooks 22 b and 32 b can be modified without departing from the scope of the present invention. In particular, the spouts of the base can be provided to be arranged between the hooks formed by the elongated profile.

Claims (10)

Device (40) for securing springs (50), associated with a Jacquard type loom harness, on a frame (4) of said loom, said device comprising several rods (42) each equipped with means (43, 44) connecting with a spring and integral with a common base (41), characterized in that said base is provided with hooks (414, 415) capable of cooperating each with a spout (22 b , 32 b ) of corresponding shape for the 'hooking (D) and unhooking (F) elastic of said device on at least one elongated profile ( 2b , 3b ). Device according to claim 1, characterized in that said base (41) is generally planar and capable of being arranged in a generally perpendicular direction (Y-Y ') to a longitudinal direction (X-X ') of said profile (2b, 3b). Device according to claim 2, characterized in that said rods (42) are essentially juxtaposed along a main plane of said base (41). Device according to one of the preceding claims, characterized in that said base (41) is pierced with a orifice (413) constituting a grip handle for said device (40). Device according to one of the preceding claims, characterized in that said hooks (414, 415) and said spouts (22 b , 32 b ) are oriented so that their respective contact surfaces (414 a , 415 a , 22 c , 32 c ) are included in the thickness ( e ) of said base (41). Device according to one of the preceding claims, characterized in that said base (41) comprises at least one operating handle (416, 417) defining a zone (416 a , 417 a ) for receiving part of a tool of detachment (60) of said device (40) relative to said elongated profile ( 2b , 3b ). Device according to one of the preceding claims, characterized in that it comprises at least one positioning tongue (418, 419) capable of cooperating with a guide member (70, 71) integral with said elongated profile ( 2b , 3b ). Fastening assembly of springs (50), associated with a Jacquard type loom harness, on a frame (4) of said loom, characterized in that it comprises several devices (40) according to one of the preceding claims and at least one elongate profile (2b, 3b) integral with said frame (4) and defining, in cross section, at least one lug (22 b, 32 b) capable of cooperating with the hooking means (414, 415) of said devices. An assembly according to Claim 8, characterized in that it comprises at least one spacer strip (70, 71) capable of being immobilized on said profile and provided with areas (70 a, 71 a) for receiving a portion (418 , 419) of the bases (41) of said devices (40), with a spacing ( p ) predetermined in the longitudinal direction (X-X ') of said profile ( 2b , 3b ). Jacquard type loom, characterized in that it comprises at least one set (1) according to one of claims 8 or 9.

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