Classifications

• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
  • D03C3/00—Jacquards
  • D03C3/24—Features common to jacquards of different types
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
  • D03C13/00—Shedding mechanisms not otherwise provided for

Definitions

• the invention relates to a crowd training device for a Jacquard type loom.
• the invention also relates to a weaving loom equipped with such a device.
• certain looms can be equipped with movable boards with a single degree of freedom between two positions and pierced with holes for passage of the arches of a Jacquard loom. This does not effectively guide the beams because the arches are -susceptible to deform, linearly and in torsion, despite their tension. This system therefore does not make it possible to adapt, with good precision, the positioning of the beams to the desired crowd.
• the invention more particularly intends to remedy by proposing a crowd training device making it possible to obtain high density and great precision in the placement of the beams.
• the invention relates to a crowd formation device which comprises, inter alia, rigid or semi-rigid beams and at least one member provided with passage openings and direct guidance, in translation, of a smooth in its movement of controlled oscillations, while this member is mobile, with two degrees of freedom, relative to the frame of the loom, in translation, in a direction generally parallel to the direction of the weft threads, and in pivoting, around an axis generally parallel to the direction of translation of the heddles, and that this member is capable of being positioned in translation and in pivoting by the warp threads passing through the eyelets of the heddles which it guides.
• the position of this member can be adjusted in translation and / or pivoting, precisely and continuously, depending on the article to be produced, while direct guidance of the heddles by this member ensures their precise positioning .
• a self-positioning of this member can thus be obtained by the tension of the warp threads passing through the heddles, these heddles being sufficiently rigid to be able to influence the position of this member.
• the beams have a rigidity sufficient to transmit a positioning force to the guide member, unlike yoke wires.
• the passage and guide holes of the healds are capable of defining the angular positioning of the healds around their axis of oscillation.
• the eyelets carried by the beams are correctly positioned with respect to the direction of incidence of the corresponding warp threads.
• the passage and guide orifices of the healds have a non-circular section, while the healds also have a non-circular section.
• the device incorporates one or more of the following characteristics: -
• the passage and guide orifices are aligned in a row extending generally in the direction of tipping of the loom.
• the member provided with passage holes and guide rails is adapted to rest on at least one rail extending in a direction generally parallel to the direction of passage of the weft son. Locking means may be provided for this member on this rail.
• the member comprises housings capable of each receiving one end of a guide sheath of a force transmission element to one of the heddles, these housings each being arranged opposite a passage and guide orifice. of a smooth. Each housing is extended by orifices for the passage of an element of transmission of force and parts of a beam associated with this element.
• the aforementioned member is provided, on at least one lateral face, with a relief capable of cooperating with a corresponding relief provided on a lateral face of an adjacent member, with a view to a partial nesting of these members.
• the invention finally relates to a weaving loom equipped with a crowd training device as previously described.
• This trade is simpler to implement and to regulate than the trades of the prior art, in particular during a change of crowd.
• FIG. 2 is a principle view in plane II and according to the arrows F 2 in Figure 1, the number of warp threads being reduced to nine and the number of bars being reduced to three for clarity of the drawing;
• Figure 3 is a view similar to Figure 2 in another configuration of use of the trade;
• Figure 4 is a partial exploded perspective view of a part of the crowd formation device used on the loom of Figure
• Figure 5 is a partial section along the line VV in Figure 4;
• Figure 6 is a view, partial and with cutaway, according to arrow F 6 in Figure 4;
• Figure 7 is a perspective representation of detail VII in Figure 6 and - Figure 8 is a view similar to Figure 6, on a smaller scale, for a crowd formation device according to a second embodiment of the invention.
• the loom M represented in FIG. 1 comprises a beam 101 and a coil 102 between which the warp threads 103 of the loom circulate.
• A-A the direction of picks on loom M, that is to say the direction of the weft threads.
• the loom M also includes a frame 104 supporting the elements 101 and 102 and a system (not shown) for passing picks.
• the chassis 104 is extended by a superstructure 105 disposed above the main part of the loom M and supporting a device 110 for driving and selecting the beams.
• a smooth 120 of this craft is more particularly visible in Figures 4 and 5. It is made of a metal strip, for example steel, and comprises, on its side faces 121 and 122, two folds 123 and 124 which extend over substantially the entire height of the heddle 120 and define two branches 125 and 126 arranged in two directions Y 125 and Y i26 parallel to each other.
• the heald 120 therefore has a generally Z-shaped flattened cross section. Within the meaning of the present invention, S or Z shapes are equivalent, because they in fact correspond to two directions of observation of the same section.
• This stringer 120 has significant rigidity.
• the heald 120 is also provided with an eyelet 127 for passing a warp thread 103.
• Each heald 120 is associated with a semi-rigid rod 130 made, for example, of carbon which controls its vertical oscillations, these oscillations being represented by the double arrow Fi in FIG. 4.
• the assembly between the heald 120 and the rod 130 is carried out by any suitable means, preferably reversible.
• Each rod 130 extends, between the heald 120 which it drives and the device 110, inside a sheath 140 making it possible to guide it and protect it against the external environment. In Figure 1, only part of the sheaths 140 is shown for clarity of the drawing. In practice, the number of rods 130 and sheaths 140 is adapted to the number of beams 120 in the trade.
• a bar 200 makes it possible to guide each heald 120 in its movement of oscillations and vertical translations.
• This bar 200 is made of plastic and comprises two cross members 201 and 202 in which two series of orifices 203 and 204 are formed.
• a single stringer is shown in Figures 4 to 8 for clarity of the drawing.
• a large number of healds can be provided, each bar 200 being able to guide as many healds 120 as it has orifices 203 and 204.
• each orifice 203 has a shape adapted to the cross section of the heddle 120 which it receives, which allows it to guide it in its translational movement 1. More precisely, the orifice 203 has a flattened Z-shaped cross section and forms two branches 203 5 and 203 s in which the branches 125 and 126 of the cross section of the heald 120 are engaged. The angular position of each heald 120 around its longitudinal axis ZZ 'is imposed by the cooperation of branches 203 5 and 125, on the one hand, 203 6 and 126, on the other hand. An orifice 204 appears more clearly in FIGS. 6 and 7.
• It comprises an entry area 204 x into which the lower end 140 ⁇ of a sheath 140 can be introduced.
• a shoulder 204 2 forms a stop for the introduction of the 'end 140 X.
• the orifice 204 is extended by a conduit 204 3 for passage of the rod 130.
• the orifice 204 also comprises two branches 204 5 and 204 6 similar to the branches 203 5 and 203 s of the orifice 203 and allowing the passage of the branches 125 and 126 through the orifice 204. It is thus possible to remove a stringer 120 of the bar 200 by extracting it from the top through the corresponding orifice 204, as represented by the arrow F 3 in FIG. 6.
• the device for forming the crowd of loom M comprises several bars 200 some of which are shown in phantom in Figures 4 and 5. These bars rest on two rails 251 and 252 which are supported by the frame 104 and extend in directions generally parallel to the direction AA '.
• the bars 200 and the like are each provided with two hooks 206 and 207 allowing them to come to bear on the rails 251 and 252.
• the bar 200 shown in FIGS. 4 to 7 comprises twenty-four orifices 203 for passing and guiding a heald 120 and twenty-four orifices 204 for partially receiving a sheath 140, the orifices 203 and 204 being aligned in pairs in a direction parallel to the sliding direction of the beams 120 which is parallel to their longitudinal axes ZZ '.
• the bars 200 are supported on the rails 251 and 252 and can slide parallel to the direction A-A ', as shown by the double arrow F.
• the respective dimensions of the legs 206 and 207 and of the rails 251 and 252 are such that a pivoting movement of each bar 200 is possible around a central axis Z ⁇ -Z' ⁇ parallel to the direction Z-Z ', this movement pivoting being represented by the double arrow P 4 .
• the angle of the bars 200 relative to the direction AA ′ can go from an oca value . relatively small, represented in FIG. 2, at a higher value ⁇ 2 , visible in FIG. 3, as a function of the density of the warp threads 103 and / or of the heddles 120 over the deepening.
• the spacing between two consecutive bars decreases, from a value ei to a value e 2 , when passing from the configuration of FIG. 2 to that of FIG. 3. Measures are taken to prevent a bar 200 does not interfere with the warp threads passing through the healds guided by a neighboring bar, in particular by limiting the minimum value of the difference between two consecutive bars.
• the tension T of the warp threads 103 and their orientation make it possible to position the bars 200 relative to the rails 251 and 252 both in translation along arrow F 4 and in pivoting according to arrow P.
• each bar 200 can be positioned with two degrees of freedom relative to the rails 251 and 252, that is to say relative to the frame 104, which allows a fine and continuous adjustment of the position of the guide bars 200 and, consequently, healds 120.
• the bar 200 is provided with two elastically deformable tabs 208 and 209 intended to cooperate respectively with the hooks 253 and 254 for immobilizing the bar.
• the bar 200 forms, opposite the tab 208, a heel 210 intended to avoid plastic deformation of the tab 208, when the hook 253 is put in place.
• a heel 211 is intended to serve as a stop to a deformation of the tab 209, during the installation of the hook 254.
• the bars are designed to be arranged alternately in one direction and in another around their pivot axes Z ⁇ -Z' ⁇ , the hook 206 of a bar 200 coming to bear on the rail 251 while the hooks 207 of the two adjacent bars come to bear on this same rail. This allows the abovementioned undulations to overlap.
• the branches 206 and 207 are respectively provided with two projections 212 and 213 arranged at heights h 2 ⁇ 2 and h 2 ⁇ 3 different from the lower ends of the hooks 206 and 207.
• the immobilization obtained with the hooks 207, 208, 253 and 254 is reversible. It is indeed possible to release the hooks 253 and 254 to release the bars 200 which can then be moved in the direction of the arrows F 4 and P. This can take place during a change of article or a maintenance operation. In this second case, the bars adjacent to a bar 200 can be separated from the latter, for example for the purpose of working on a heddle.
• the bar 700 of this embodiment differs from the previous one, essentially in that two separate crosspieces are not provided, of the type of crosspieces 201 and 202, but that the orifices 703, for guiding a rail 620, and 704, constituting a housing for receiving the end of a sheath 640, are formed by a single opening formed on the height of the bar 700.
• a single immobilization lock can be provided for each bar.
• the healds 120 and 620 of the two embodiments described are guided by the orifices 203 and 703 on one side of their eyelets 127 and the like, in this case the orifices located above the eyelets.
• the invention has been shown with a heald drive device mounted on the superstructure 105 of the loom M. It is however usable in the case where an equivalent device is mounted in the frame 104, between the beam 101 and the coil 102 , in which case the heddles 120 and the like would be controlled under the ply of warp threads 103.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Looms (AREA)
• Percussion Or Vibration Massage (AREA)
• Rehabilitation Tools (AREA)
• Orthopedics, Nursing, And Contraception (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=27619994

Family Applications (1)

Country Status (8)

Families Citing this family (3)

Family Cites Families (12)

• 2002
  • 2002-02-07 FR FR0201508A patent/FR2835537B1/fr not_active Expired - Fee Related
• 2003
  • 2003-02-06 EP EP03718845A patent/EP1472396B1/de not_active Expired - Lifetime
  • 2003-02-06 CN CNB038032155A patent/CN100572628C/zh not_active Expired - Fee Related
  • 2003-02-06 WO PCT/FR2003/000379 patent/WO2003066945A2/fr active Application Filing
  • 2003-02-06 DE DE60328081T patent/DE60328081D1/de not_active Expired - Lifetime
  • 2003-02-06 US US10/503,815 patent/US7017617B2/en not_active Expired - Fee Related
  • 2003-02-06 JP JP2003566284A patent/JP4230361B2/ja not_active Expired - Fee Related
  • 2003-02-06 AT AT03718845T patent/ATE434674T1/de not_active IP Right Cessation

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