EP1176237B1 - Harness with a heedle damping device for a loom and heddle damping device - Google Patents

Abstract

The loom heald frame has a damper system (200), with a profiled support (210) which extends over the whole length of the lower profiled member of the frame. It carries a supply component along the length of the support, to form a buffer (24) in relation to the heads of the heald loops (9'). The damper system for a loom heald frame has a play (J'), which is less than the play between the healds and the heald carrier. The damper play can be adjusted and controlled by at least one intermediate profile (220), mounted in the support profile with a setting unit (223) between them, to give movements between at least one position without play and a setting to give play. The profiled support or the intermediate profile has a longitudinal groove (22) to accommodate the buffer in a shrouded fitting. The buffer has an inverted T-shape, with the leg lodged in the groove. The arms are shaped according to the heald head loops. A circular section of the buffer is lodged within the longitudinal groove. The profiled support is firmly bonded to the upper heald frame profile (2) by an adhesive, after it has been positioned by a jig with shaped positioning clips for the correct location. The clips can determine the amount of play. The support profile and the heald carrier are one and the same profiled section, for the play to be set by the support profile, and the support profile can set the amount of play with setting units. The assembly can have two dampers, with separate units for the upper and lower frame profiles.

Description

The present invention relates to a stringer frame for an equipped weaving machine of a smooth damper device, this frame comprising an upper profile provided with an upper smooth door rod, a lower profile with a door rod lower rails, two lateral uprights assembled to said sections to form said frame and weaving rails mounted on said smooth door rods by their ends in the form of a loop, the damping device being mounted on least one of the profiles of the frame and positioned in a gap between said profile and the door rod smooth in such a way as to damp the head of the loops of smooth. The invention also relates to a smooth damper device for equip a smooth frame.

Increasing the insertion rates of the weft thread in the warp threads has made evolve the moving mechanical parts of weaving machines like the smooth frames going from the wooden frame in the 1960s to the fiber frame of in the 1990s. During this period, the insertion speed has increased from 150 to 900 rounds per minute. Today, this speed continues to grow and approaching 1,400 rounds per minute, revealing behaviors and totally new technical problems, especially at the level of the frames of smooth and weaving rails. Remember that the weaving rails carry and guide each chain wire. So there are as many weaving looms as warp yarns, divided by example one out of two on two smooth frames. These are put in motion of alternative vertical translation every other stroke by a drive mechanism adapted. That is to say that for a speed of 1200 rounds per minute, the frames of smooth are animated with a speed of 600 periods per minute.

The ends of the weaving rails have a loop shape and are mounted on the smooth door rods with an imposed operating clearance of about 3 mm. This gambling is necessary for several reasons. The introduction of the warp threads in the eyelet of the weaving smooth is usually performed automatically by a Adequate tucking machine, this game allows the rails to line up automatically. Once threaded, the weaving rails must be able to slide freely along the smooth door rods to allow the weaver to intervene in the chain son ply, for example to repair a wire after breaking. This game is also necessary to avoid any risk of blockage of the rails compared to smooth door rods taking into account manufacturing tolerances and the effects of expansion. On a dynamic level, the very strong excitement of vibratory frames requires the presence of this operating set without which the ends of the rails of weaving would break very quickly.

In dynamic mode, the hoop frames evolve as a mass structure variable with the effect of chain tension and the effect of inertia, sometimes the smooth is in support on the upper rod, sometimes it is supported on the lower rod, sometimes it is free between the two support positions. When the frame cycles complete back and forth, there are shocks and rebounds at the loops of smooth. With the speeds reached today, these very strong shocks cause a premature wear of smooth door rods and inadvertent breakage of smooth.

Publication WO 97/26396 proposes a solution to this problem by inserting a elastomer cord inside the smooth loops, either directly into the smooth loop, either directly on the smooth door rod. This solution is not optimal since it generates other disadvantages. In the first case, the cord must be inserted into each smooth loop on each frame and after each mount smooth on their frame. This additional operation greatly increases the preparation time of the weaving machine. Moreover, at each dismantling of smooth of their frame, it is necessary to remove this cord, which poses difficulties since it has been notched by the smooth loops under the effect of shocks cashed. In the second case, the loops must be of the "extra" type and the positioning of the cord remains tedious and delicate. Moreover, this cord being placed inside the loops of Smooth tends to lock the rails on their rods, thus removing their play of functioning and affecting their free sliding along these rods. mounted

The solution proposed in the publication JP-A-10 001844 provides a mounted device between one of the profiles of the stringer frame and the stringer heads in the form of a brush. This device makes it possible to limit the lateral displacement of the rails, but no case of damping the movement in vertical translation of the rails.

The device described in US-A-3 895 655 is also arranged between one of the profiles of the frame and the smooth heads but without any operating game in to eliminate any risk of vibration of the rails and noise. Nevertheless, this solution requires disassembly of the device at each new smooth tying and does not allow the insertion of the son of chain by a machine of automatic entry. In addition, its rivet fastening system is very archaic and no longer meets current productivity requirements.

Publication WO-A-01/48284 also proposes a solution relating directly a damping element on the profiles of the stringer frame, these sections being commonly made of spun or extruded aluminum alloy. This solution can not only with profiles made of a metallic material which a manageable and acceptable straightness to guarantee a functioning game between the smoothing heads and the constant damping element along the entire length of the frame. AT Conversely, this solution is not at all suitable for smooth frame profiles. made of composite materials (carbon fiber or other) whose straightness is much less good. In this case, the operating clearance between the smoothing heads and the damping element can not be constant over the entire length of the frame, the arrow of a section made of composite materials that can reach, for example, 4 mm 3 m in length. In addition, this solution does not allow to make a game adjustment between the damping element and the smoothing heads, in particular to lock the rails in normal operation of the loom.

The object of the present invention is to overcome these drawbacks by proposing a shock absorber device simple, easy and quick to set up, respecting the game of weaving machines, in no way affecting their freedom to movement on the smooth door rods, which can be mounted as a kit on frames of smooth already existing and particularly suitable for smooth frames made of materials composites.

This object is achieved by a stringer frame as defined in the preamble and characterized in that that the damping device comprises a support profile extending over the entire length of said section of the stringer frame and comprising at least one flexible element extending over the entire length of the support profile and forming a bumper disposed look at said head of the loops and in that the damping device is arranged to provide a clearance J 'between the damping device and the head of the loops of smooth lower than the operating clearance J between the rails and the smooth door rods.

In an alternative embodiment, the damping device may comprise means of adjusting said clearance J ', these adjustment means possibly comprising at least one profile intermediate mounted in said support profile, an adjusting member being arranged between them and mobile between at least one position called "with game" and a position called "Without play".

The support profile or the intermediate section preferably comprises a groove longitudinal arrangement arranged to receive by interlocking said flexible element, which can be interchangeable.

This flexible element may have an inverted T-section, the leg of the T being arranged to be housed in said longitudinal groove by interlocking and the branch of the T having a profile facing said head of the hollow, raised or plan. The flexible element may also have a circular section arranged to to lodge in said longitudinal groove by interlocking.

Advantageously, the support profile is fixed integrally to said profile by bonding.

It can comprise a positioning template arranged to precisely position said support profile on said profile before gluing respecting the game J '. In that case, the positioning jig has positioning clips, each provided with two notches respectively corresponding to said support profile and said rod smooth door.

In an alternative embodiment, the support profile and the smooth door rod can be formed of one and the same piece. In this case, the game J 'is determined by said support profile.

In another variant embodiment, the stringer frame may comprise two damping devices provided respectively on the upper profile and on the profile lower of said smooth frame.

This object is also achieved by a smooth damper device characterized in that it comprises a support profile provided with a longitudinal groove arranged to receive by fitting a projecting flexible element forming a bumper for the head of the loops and in that it comprises a positioning template arranged for to mount precisely said support profile on the smooth frame respecting the game J ', this template consisting of positioning clips, each being provided with two notches arranged to receive respectively the support profile and the door rod smooth.

In an alternative embodiment, the support profile may comprise a side wall from which protrudes a smooth door rod, the clearance J 'being determined by said profile support.

In another variant embodiment, the support profile may comprise means of adjusting said clearance J ', these adjustment means possibly comprising at least one profile intermediate mounted in said support profile, an adjusting member being arranged between them and mobile between at least one position called "with game" and a position called "Without play".

• la figure 1 est une vue en perspective d'un cadre de lisse traditionnel,
• la figure 2 est une vue en coupe partielle du cadre de lisse équipé d'un dispositif amortisseur de lisses selon l'invention,
• la figure 3 est une vue similaire à la figure 2, illustrant un autre mode de réalisation du dispositif amortisseur de lisses,
• les figures 4 et 5 illustrent d'autres modes de réalisation du dispositif amortisseur de lisses,
• la figure 6 est une vue similaire à la figure 3 d'une première variante de réalisation du dispositif amortisseur de lisses de l'invention,
• la figure 7 est une vue similaire à la figure 6 illustrant un autre mode de réalisation du dispositif amortisseur de lisses,
• la figure 8 est une vue de détail du dispositif amortisseur de la figure 7,
• la figure 9A est une vue similaire à la figure 3 d'une seconde variante de réalisation du dispositif amortisseur de lisses de l'invention, dans une première position,
• la figure 9B est une vue agrandie d'un détail de la figure 9A,
• les figures 10A et 10B sont des vues similaires aux figures 9A et 9B de la seconde variante de réalisation du dispositif amortisseur dans une seconde position, et
• les figures 11 et 12 représentent schématiquement un profilé pour cadre de lisse réalisé respectivement en matériaux métalliques et en matériaux composites.

The present invention and its advantages will appear better in the following description of several embodiments, given by way of non-limiting example, with reference to the appended drawings, in which:

• Figure 1 is a perspective view of a traditional smooth frame,
• FIG. 2 is a fragmentary sectional view of the stringer frame equipped with a strut damping device according to the invention,
• FIG. 3 is a view similar to FIG. 2, illustrating another embodiment of the smoothing damper device,
• FIGS. 4 and 5 illustrate other embodiments of the smooth damper device,
• FIG. 6 is a view similar to FIG. 3 of a first embodiment of the smoothing damper device of the invention,
• FIG. 7 is a view similar to FIG. 6 illustrating another embodiment of the smooth damper device,
• FIG. 8 is a detailed view of the damping device of FIG. 7,
• FIG. 9A is a view similar to FIG. 3 of a second embodiment of the smoothing damper device of the invention, in a first position,
• FIG. 9B is an enlarged view of a detail of FIG. 9A,
• FIGS. 10A and 10B are views similar to FIGS. 9A and 9B of the second alternative embodiment of the damping device in a second position, and
• Figures 11 and 12 show schematically a profile for smooth frame respectively made of metal materials and composite materials.

With reference to FIG. 1, the invention relates to a stringer frame 1 for a machine to weave. In a known manner, this smooth frame 1 comprises an upper profile 2 provided with an upper smooth support rod 3, a lower section 4 provided with a lower smooth door rod 5, two lateral uprights 6, 7 assembled to said sections 2, 4 to form said frame. This smooth frame 1 is preferably made of composite materials, for example based on carbon fiber, glass or other fibers. The composite materials have the advantage of giving the stringer frame 1 a excellent mechanical resistance to fatigue while significantly reducing weight. Of course, the frame 1 can be made of any other suitable material. The assembly mode of said smooth frame 1 is not detailed since it is not the subject of the present invention.

It carries a set of weaving webs 8, only two of which are represented, mounted on the smooth door rods 3, 5 by their ends 9 in the shape of a loop, in respecting an operating clearance J of about 3 mm. In the center, each smooth door an eyelet 10 for the passage of a warp 11 (see Fig. 2). They are usually made of a hardened metal material to withstand the stresses mechanical

The smooth frame 1 according to the invention is advantageously completed by a device Smooth damper 20 with reference to Figures 2 to 5. This damper device of 20 is provided, in the examples shown, on the upper profile 2, but can also be arranged on the lower section 4 or on the two sections, according to the case. The upper profile 2 has a substantially rectangular section 12, extended and extended by a rear wall 13 on which the rod bears smooth upper 3 protrudes, T-shaped lying down. According to the design of the smooth frame 1, the smooth door rod 3 is made in one piece with the profile or profiles 2, 4 or is an insert for example by gluing completed with or without rivets or by any other equivalent means of attachment. This smooth door rod 3 receives the loop upper 9 of the smooth 8, which has a shape in C and is commonly called "smooth loop of tex". Between the upper edge of the smooth door rod 3 and the edge lower section 12 of the section 2 is an interval 14 sufficient to accommodate said damping device 20. It is therefore positioned above the head of the loop 9 and is arranged to dampen the shocks of the weave 8.

FIG. 2 represents the weaving loom 8 in static mode where it bears on the upper sliding door rod 3. The operating clearance J of approximately 3 mm is visible on the lower smooth door rod 5. The damping device 20 introduces a play J 'of about 0.5 to 1 mm visible between the damping device 20 and the head of the smooth loop 9. With this configuration, the damping device 20 does not hinder not the freedom of the weaving loom 8 in static mode, which remains mobile along the 3 and 5. It is only in dynamic mode that the damping device 20 is used and fully fulfills its role by limiting the operating clearance J of the stringer 8 to the game I and by damping the head of the loop of smooth 9 if the deflection of the smooth is greater than 1mm. The head of the smooth loop 9 then stumbles against the device damper 20 before the lower rail loop 9 does not hit the door rod smooth lower 5. It is said that it acts in reaction on the rod, unlike the cord positioned inside the smooth loops which acts in action as in the state of the described in the introduction. Thus, this damping device 20 limits the vibratory motion of the smooth 8 due to shocks and rebounds.

In the example of FIG. 2, the damping device 20 comprises a profile support 21 of small section and extending over the entire length of the upper profile 2 of the stringer frame 1. It is, for example, made of extruded aluminum or in any other equivalent material. It has an approximately square section and such dimensions to be housed in the interval 14. It has in its lower edge a longitudinal groove 22 for receiving a flexible element 23 forming a bumper, made, for example, in a polymer, an elastomer, a composite material or any other equivalent material chosen to withstand vibrational frequencies and to the efforts to bear. This stop 23 may have an inverted T-section, the leg T being housed in the longitudinal groove 22 by interlocking and the bar of the T being curved for example to marry approximately the rounded top of the loop of smooth 9. It is mounted preferably by fitting into the profile support 21 to be interchangeable and easily replaced in case of wear. The contact surfaces between the stopper 23 and the support profile 21 are perpendicular to the orientation of the beam 8 and therefore to the orientation of the shocks for avoid any risk of accidental release of the stopper 23 with respect to the groove longitudinal 22.

1. Collage du profilé support 21 sur la paroi arrière du profilé supérieur 2 à l'aide des clips de positionnement 30 pour placer précisément ce profilé support 21 par rapport à la tringle porte lisses 3, puis

2. Remplissage avec la colle de l'espace restant entre l'arrière du profilé support 21 et le bord inférieur de la section rectangulaire 12.

The support profile 21 is fixed on the upper section 2 of the frame 1 by any suitable means and in particular by gluing by means of a quick-setting glue. In order to respect the clearance J ', the mounting of this support section 21 is carried out by means of a positioning jig constituted, for example, by several positioning clips 30 placed regularly along the length of the support profile 21. Each clip positioning device 30 comprises two notches 31, 32 respectively corresponding to the support profile 21 and the smooth door rod 3 or 3 '(see FIG 3). The editing is done in two stages:

1. Bonding the support profile 21 on the rear wall of the upper profile 2 with the positioning clips 30 to precisely position this support section 21 relative to the smooth door rod 3, then

2. Filling with glue the remaining space between the back of the support profile 21 and the lower edge of the rectangular section 12.

Once positioned and glued, the support profile 21 is an integral part of the profile superior 2 and remains at home. The bumper 23 can easily be put in place and removed groove 22 when it needs to be changed, without any difficulty. These measures The damper 20 has the advantage of being technically independent of the weaving rails 8. Thus, the disadvantages of the state of the art described above are deleted.

FIG. 3 illustrates another embodiment of FIG. upper section 2 with its rectangular section 12 and its rear wall 13. The rod 3'a smooth door, in this variant, a form of G in which lodges a loop 9 'inverted G-shaped smooth, commonly called "extra smooth loop". The damping device 20 is similar to the previous one. The only difference lies in the shape of the stopper 24, which has, in this variant, a circular section. The clips of positioning 30 are of course adapted to this embodiment variant, in particular the housing 32 with respect to the smooth door rod 3 '.

Figures 4 and 5 illustrate two other embodiments of the device damper 20 in which the stopper 25, 26 has an inverted T-section, the branch T being respectively straight and conical. Of course, other forms of bumper can be considered as needed. Likewise, other sections of profile support 21 and groove 22 are conceivable according to the section and dimensions of interval 14 available.

Figures 6 to 8 illustrate a first embodiment of the device 20 'smooth damper according to the invention. In this variant, the smooth door rod 30, 30 'is not integrated with the upper profiles 2' and / or lower of the heald frame 1 but directly to the support profile 21 'of the damping device 20'. More specifically, the sections 2 'of the frame of the rail 1 are extended, after the section rectangular elongate 12, by a substantially planar rear wall 13 'arranged for receive the support profile 21 '.

This support profile 21 'has a side wall 27 of which protrudes a smooth door rod 30, 30 '. This smooth door rod 30, 30 'has a shape of T lying down, that is a form of G according to whether it is intended to carry healds whose loops are respectively of the type "Tex" or "Extra". The outer form of the side wall 27 of the support profile 21 'is such that it is complementary to the shape interior of the rear wall 13 'of the profile 2' of the frame 1.

The support profile 21 'comprises, as in the previous example, a groove longitudinal 22 to receive a flexible member 24 forming a bumper. This bumper 24 may have a circular section or a section corresponding to the stops 23, 25 or 26 previously described or any other suitable section.

This support section 21 'can be made of aluminum or aluminum alloy obtained by extrusion or spinning, mainly for reasons of lightness and cost. On the other hand, the smooth door rod 30 'may be covered with a hood 28 bonded or clipped made for example stainless steel to ensure good performance in the wear of this smooth door rod 30 '.

The advantage of this embodiment essentially lies in its implementation. artwork. Indeed, the smooth door rod 30, 30 'being integrated with the support profile 21', the clearance J 'required between the head of the loop loops 9, 9' and the stopper 24 is determined from Precisely by the support profile 21 'itself. It is no longer necessary to use a specific template to mount the damping device 20 'on the 2 'profiles of the smooth frame 1, which greatly simplifies the operation of mounting. This assembly consists only of gluing the lateral wall 27 of the profile support 21 'against the rear wall 13' of the corresponding section 2 'and then fill with glue the space existing between the back of the support profile 21 'and the edge lower part of the rectangular section 12 of the profile 2 '.

FIGS. 9 and 10 illustrate a second embodiment variant of the device Smooth damper 200 according to the invention. In this variant, the device damper 200 is arranged to allow adjustment of the game J '. It has a profile 210, which as in the example with reference to Figures 6 to 8, is extended by a side wall 27 of which projects a smooth door rod 30 'shaped G which allows to wear smooth whose loops 9 'are of the type "Extra". It is obviously that this support section 210 can also be equipped with a rod smooth T-shaped door 30 coated to wear smooth with loops are type "Tex". Similarly, this support section 210 may not integrate the rod smooth door as in the embodiment with reference to Figures 2 to 5.

This support section 210 is completed by an intermediate profile 220 which comprises a longitudinal groove 22 for receiving a flexible element 24 forming a stopper. This bumper 24 has a circular section but may also have a section compliant stoppers 23, 25 or 26 described with reference to FIGS. 2, 4 and 5.

This intermediate profile 220 comprises an inverted L-shaped rib 221, this rib being housed in an inverted G-shaped rail 211 formed in the profile support 210. A flexible cord 222, for example made of elastomer, is inserted between the bottom of the rail 211 and the rib 221 and an adjusting member 223 is positioned between the the branches of the L and G respectively of the rib 221 and the rail 211. This organ 223 has an elliptical shape and is coupled to a control member (not shown) which allows to move it between two stable positions: a position so-called "with play" and a position called "without play". The control member can be Manual and powered by the weaver or automatic and related to the operating mode of the loom.

In the so-called "play position" illustrated in FIGS. 9A and 9B, the largest diameter of the regulating member 223 is oriented vertically, which goes up the intermediate profile 220 inside the support profile 210 and a household play J ' between the stopper 24 and the heads of the loop loops 9 '. This position is particularly suitable for easily and quickly smooth 8 and the retraction son son by a machine tuck automatic.

In the so-called "play-free" position illustrated in FIGS. 10A and 10B, the largest diameter of the regulating member 223 is oriented horizontally, which drops the intermediate profile 220 outside the support profile 210 and removes the game J ' between the stopper 24 and the heads of the loop loops 9 '. This position is particularly suitable during normal operation of the loom. The 9 'upper loop loops heads are thus blocked in vertical translation which makes it possible to reduce even more effectively the breaks of the loops of noise caused by vibrations. In this position, the game J is kept between the smooth loops 9, 9 'and the smooth door rod 5 lower, which allows the weaver to intervene between the rails if necessary, the rails being able to pivot around their upper fixed point.

It is clear from this description that the invention achieves the goals set. In particular, the damping device 20, 20 ', 200 is simple, easy to perform and to mount, economical, reliable and efficiently solve problems wear and premature breakage of smooth loops, wear of smooth door rods, by also reducing the sound level of the weaving machines. In addition, thanks to judicious positioning of this damping device 20, 20 ', 200 the smooth frames remain fully compatible with automatic tying machines chain and with the requirements of the weavers concerning the mobility of the healds.

Another advantage lies in the design of the damping device 20, 20 ', 200 by a support profile 21, 21 ', 210 attached to the or sections 2, 4 of the frame of smooth 1 and not directly integrated with these profiles. This original construction allows to make the damping device 20, 20 ', 200 completely compatible with smooth frames made of composite materials for example based on carbon, fiberglass or other fibers. Indeed, the support profile 21, 21 'being made of a spun or extruded metal material has a straightness perfectly controlled which makes it possible to compensate for the lack of straightness of the sections 2, 4 of the smooth frame 1 encountered with the technical materials.

To illustrate this phenomenon, Figures 11 and 12 show schematically a section 2, 4 of smooth frame 1 respectively made of metallic materials and composite materials. In FIG. 11, the profile 2, 4 extruded or spun, for example in an aluminum alloy has a perfect linearity to a few tenths. It is found that the gap 14 existing between the section 12 of the section 2, 4 and the rod smooth door 3, 3 ', 5 is constant over the entire length of the profile 2, 4 ranging from 1m to 4m. In FIG. 12, extruded or extruded profile 2, 4 made of composite materials presents a lack of linearity voluntarily represented in an exaggerated manner. We observe that the interval 14 is variable over the entire length of the profile 2, 4 and the door rod 3, 3 ', 5 made by rolling a metal material makes it possible to ensure this indispensable linearity for the rails 8. It is important to remember that the function essential sections 2, 4 of a smooth frame 1 is to bring the mechanical strength to the bending of the smooth door rod 3, 3 ', 5 while lightening the mass of the frame and increasing its resistance to mechanical fatigue. That's why Smooth frames made of composite materials make it possible to fulfill this function in a very efficient and optimal way.

Moreover, it brings an additional advantage. For weaving of articles requiring a low tension of chain or a low density of son, the smooth ones have tendency to lie down. They bend and then get stuck, disrupting the unwinding of the weaving. This new damping device 20, 20 ', 200 avoids this inconvenience due to the principle of adjustable play on the upper rod and in particular in its position "without play" for the device 200. This damping device 20, 20 ', 200 can of course be offered for sale or directly integrated with the new Smooth frames, either in kit to equip already existing smooth frames.

The present invention is not limited to the described embodiments but extends to any modification and variation obvious to a person skilled in the art, while remaining within the scope of the protection defined in the claims.

Claims (15)

1. A heald frame (1) for a loom fitted with a heald damping device (20, 20', 200), this frame comprising an upper profile (2, 2') provided with an upper heald bearing bar (3, 3', 30, 30'), a lower profile (4) provided with a lower heald bearing bar (5), two lateral uprights (6, 7) assembled with said profiles (2, 4) to form said frame (1) and weaving healds (8) mounted on said heald bearing bars (3, 3', 30, 30'. 5) by their ends in the form of a loop (9, 9'), the heald damping device (20, 20', 200) being mounted on at least one of the profiles (2, 2', 4) of the heald frame (1) and positioned in a gap (14) between said profile (2, 2', 4) and the corresponding heald bearing bar (3, 3', 30, 30', 5) so as to damp the head of the heald loops (9, 9'), characterised in that the damping device (20, 20', 200) comprises a support profile (21, 21', 210) extending over the entire length of said profile (2, 2', 4) of the heald frame (1) and comprising a flexible element (23-26) extending over the entire length of the support profile (21, 21', 210) and forming a buffer arranged opposite said head of the heald loops (9, 9'), and in that the damping device (20, 20', 200) is arranged to provide a play J' between said damping device (20, 20', 200) and the head of the heald loops (9, 9') which is less than the operating play J between the healds (8) and the heald bearing bars (3, 3', 30, 30', 5).
2. A heald frame according to Claim 1, characterised in that the damping device (200) comprises means for adjusting said play J'.
3. A heald frame according to Claim 2, characterised in that the adjustment means comprise at least one intermediate profile (220) mounted in said support profile (210), an adjustment element (223) being arranged between them and mobile between at least one position referred to as "with play" and one position referred to as "without play".
4. A heald frame according to any one of the preceding claims, characterised in that the support profile (21, 21') or the intermediate profile (220) comprises a longitudinal groove (22) arranged to receive said flexible element (23-26) by fitting.
5. A heald frame according to Claim 4, characterised in that the flexible element (23, 25, 26) has an inverted T section, the leg of the T being arranged to be housed in said longitudinal groove (22) by fitting and the branch of the T having a profile opposite said head of the heald loops (9, 9') which is recessed, in relief or flat.
6. A heald frame according to Claim 4, characterised in that the flexible element (24) has a circular section arranged to be housed in said longitudinal groove (22) by fitting.
7. A heald frame according to Claim 1, characterised in that said support profile (21, 21', 210) is fixed integrally to said profile (2, 2', 4) by gluing.
8. A heald frame according to Claim 7, characterised in that it comprises a positioning template arranged for precisely positioning said support profile (21) on said profile (2, 4) before gluing while maintaining the play J'.
9. A heald frame according to Claim 8, characterised in that the positioning template comprises positioning clips (30), each provided with two notches (31, 32) corresponding respectively to said support profile (21) and to said heald bearing bar (3, 3', 5).
10. A heald frame according to any one of Claims 1 to 7, characterised in that the support profile (21', 210) and the heald bearing bar (30, 30') are formed of one and the same piece and in that the play J' is determined by said support profile (21', 210).
11. A heald frame according to any one of the preceding claims, characterised in that it comprises two damping devices (20, 20', 200) provided respectively on the upper profile (2, 2') and on the lower profile (3, 3') of said heald frame (1 ).
12. A heald damping device (20, 20', 200) intended to be fitted on a heald frame (1) of a loom, characterised in that it comprises a support profile (21, 21', 210) provided with a longitudinal groove (22) arranged to receive by fitting a flexible element (23-26) forming a buffer for the head of the heald loops (9, 9'), and in that it comprises a positioning template arranged to mount said support profile (21) precisely on the heald frame (1 ) while maintaining a play J' between said damping device and the head of the heald loops, this template being formed of positioning clips (30), each being provided with two notches (31, 32) arranged to receive the support profile (21) and the heald bearing bar (3, 3', 5) respectively.
13. A device according to Claim 12, characterised in that the support profile (21', 210) comprises a lateral wall (27) from which protrudes a heald bearing bar (30, 30') and in that the play J' is determined by said support profile (21', 210).
14. A device according to Claim 13, characterised in that the support profile (210) comprises means for adjusting said play J'.
15. A device according to Claim 14, characterised in that the adjustment means comprise at least one intermediate profile (220) mounted in said support profile (210), an adjustment element (223) being arranged between them and mobile between at least one position referred to as "with play" and one position referred to as "without play".

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