EP3556920B1 - Rotary dobby and weaving loom - Google Patents

Description

The present invention relates to a rotary dobby for a weaving loom, as well as to a loom comprising such a dobby.

The invention relates to the field of weaving looms and their shed-forming machines, in particular to the field of rotary dobbies for controlling heddle frames.

The frame and hood of shed-forming machines contain mechanical systems which are subjected to high speeds and heavy loads due to the need to operate bulky frames of the loom. The transmission of the engine torque to the shafts of the machine, in particular by means of rollers, bolts or hooks, the reduction of the torque, the actuation of the oscillating levers and all other mechanical transmissions, stress the metal parts in friction and cause losses calorific values of the machine.

In order to obtain a sequence of individual oscillations for each output lever and thus form the shed determining the desired weave for the fabric, some shed forming machines, namely the rotary dobbies, are equipped with a shedding mechanism. reading. The smoothing mechanism makes it possible to selectively couple or decouple the output levers of the dobby drive shaft, to link or free the position of each lever to the rotation of the drive shaft. The reading system therefore constitutes a mechanical selector. Each lever can thus be individually moved or held in place, according to the desired pattern.

EP 1 845 181 A1 describes an example of a rotary dobby for a loom comprising, for each of its blades, that is to say for each of its oscillating levers: an oscillating part, sometimes called a connecting rod, coupled to a heddle frame via this blade and associated with an actuating element, sometimes called a cam, mounted idle on a main shaft of the dobby, that is to say a drive shaft; a drive element, in particular a drive disc, integral in rotation with the main shaft; two locks for the rotational coupling of the driving element and the actuating element and control means provided for moving the locks and thus coupling or decoupling the driving element with the element of actuation.

EP 1 845 181 A1 provides for each blade, as control means, a pusher moving the bolts, and, to control this pusher, an oscillating lever, itself controlled by a reading actuator represented by an arrow.

EP 0 851 045 A1 and EP 1 382 725 A1 describe other examples of dobbies, in which the reading actuators are shown in more detail.

Eventually, the wear of the reading mechanism can in particular lead to the incorrect actuation of one or more output levers due to a reading fault. Then, a weave error is produced, which results in a visible defect on the textile article made by the loom. As a result, the active lubrication of parts and their cooling play a decisive role in maintaining the correct functioning of the machine over time. The advantages of lubrication are to reduce the resistance to friction of moving mechanical parts, to evacuate the heat created by friction, to evacuate metal particles or some debris from the contact areas, to reduce operating noise and protect parts against oxidation and corrosion.

The solutions of the prior art generally rely on the oil projections emitted by the output levers from an oil stirring bath, to partially lubricate the upper part of the machine. However, some particularly stressed parts of the reading system require a permanent supply of oil, which may not be obtained by simple stirring. In particular, the most vulnerable parts of the reading system are generally located on the upper part of the machine where the stirring provides only little oil.

When an oil pump is provided, the speed of the pump ensuring the circulation of the oil is generally subject to the rotation of the drive shaft. At low drive shaft speed, the pump then struggles to supply oil to the upper part of the dobby and therefore to the reading system. However, care should be taken to avoid favoring too strong an oil dispersion in the dobby by the high-speed pump, in order to reduce the risk of oil leaking through the sealing areas of the output levers, also located in the upper part, at the hood.

EP 3 162 935 A1 describes a shed forming machine comprising a lubrication circuit, a pump and a distribution member formed by a common lever support shaft. This common shaft is tubular and has radial orifices for lubricating the bearings of the common shaft and the bearings of the output levers. However, this lubrication by the common shaft is insufficient to properly lubricate a smoothing system, which is located at a distance from the common shaft.

In addition, there are certain additional technical constraints specific to rotary dobbies including a reading system. In particular, the dobby can be inclined due to the type of loom, or in the presence of a superstructure above the loom, which can disadvantage part of the machinery to be lubricated. Also, the dobby can be produced with several configurations depending on its integration into the loom. In particular, dobbies are generally produced industrially with two symmetrical configurations, adapted to the type of control of the loom. These different dobby models therefore pose problems of configuration and standardization of the lubrication means.

EP 0 742 298 A1 describes a weaving mechanism for the formation of the shed on a weaving machine, comprising a support frame capable of containing a quantity of oil, a motor shaft intended for driving actuating rods, comprising a fixed axis on which pivots all the oscillating maneuvering members and comprising a reading system. A lubrication system is also provided, comprising a pump for supplying a series of transverse lubrication ramps arranged above the fixed axis, on which the oscillating members pivot, and above the motor shaft. .

The invention therefore aims to remedy the aforementioned drawbacks of the prior art, by providing a new rotary dobby for which the lubrication of the mechanical smoothing system is improved, to deliver sufficient oil through the circuit, and emit it in quantity adapted towards the mechanics, whatever the speed regime of the drive shaft, and in spite of any additional constraint on the dobby, such as an inclination of the dobby.

• un bâti comprenant un fond, ainsi qu'une première et une deuxième platines définissant respectivement un premier plan de support et un deuxième plan de support traversant le fond, en étant parallèles et distants l'un de l'autre ;
• un système de lubrification comprenant un circuit de lubrification et une pompe de mise en circulation du lubrifiant dans le circuit de lubrification ;
• un arbre commun, supporté par le bâti et s'étendant entre le premier plan de support et le deuxième plan de support ;
• des leviers de sortie, montés mobiles en rotation autour de l'arbre commun entre le premier et le deuxième plans de support, et animés de mouvements d'oscillation alternative en cours de tissage;
• un arbre d'entraînement des leviers de sortie, supporté par le bâti et s'étendant entre le premier plan de support et le deuxième plan de support ;
• des dispositifs d'entraînement mécaniques montés autour de l'arbre d'entraînement, chaque dispositif d'entraînement étant configuré pour basculer entre :
  • ∘ une configuration accouplée, dans laquelle le dispositif d'entraînement assujettit la mobilité en rotation de l'un des leviers de sortie à la rotation de l'arbre d'entraînement, et
  • ∘ une configuration découplée, dans laquelle le dispositif d'entraînement(19) affranchit la mobilité en rotation dudit levier de sortie de la rotation de l'arbre d'entraînement ;
• un système de lisage, configuré pour sélectivement basculer les dispositifs d'entraînement entre la configuration accouplée et la configuration découplée, l'arbre d'entraînement, l'arbre commun, les dispositifs d'entraînement et le système de lisage étant décalés selon une direction de hauteur par rapport au fond.

The invention relates to a rotary dobby for a loom, the rotary dobby comprising:

• a frame comprising a bottom, as well as a first and a second plate respectively defining a first support plane and a second support plane crossing the bottom, being parallel and distant from each other;
• a lubrication system comprising a lubrication circuit and a pump for circulating the lubricant in the lubrication circuit;
• a common shaft, supported by the frame and extending between the first support plane and the second support plane;
• output levers, mounted to be movable in rotation around the common shaft between the first and the second support planes, and driven with alternating oscillating movements during weaving;
• an output lever drive shaft, supported by the frame and extending between the first support plane and the second support plane;
• mechanical drives mounted around the drive shaft, each drive device configured to switch between:
  • ∘ a mated configuration, in which the drive device subjects the rotational mobility of one of the output levers to the rotation of the drive shaft, and
  • ∘ a decoupled configuration, in which the drive device (19) frees the rotational mobility of said output lever from the rotation of the drive shaft;
• a reading system, configured to selectively switch the drive devices between the coupled configuration and the decoupled configuration, the drive shaft, the common shaft, the drives and the reading system being offset in one direction height from the bottom.

According to the invention, the lubrication system comprises a lubricant distributor, which is distinct from the common shaft, and which comprises several lubricant emission ports, which are supplied with lubricant by the lubrication circuit and which are offset according to the invention. the direction of height in relation to the reading system.

According to the invention, the distributor comprises at least two tubular sections each carrying at least one of the emission mouthpieces, the two tubular sections being fluidly connected to one another to a passage section, the lubricant passage from one section to the other being limited by a partial obstruction of the passage section.

The lubricant distributor of the invention makes use of gravity to ensure the lubrication of the mechanical reading system, since the mouths of the distributor are offset in the direction of height with respect to the parts to be lubricated of the mechanical reading system, this is that is to say, are located above these parts to be lubricated. During its use, the dobby will in fact be arranged so that the height direction is oriented vertically upwards, or with a certain angular inclination with respect to this orientation. Each lubricant emission mouthpiece is thus arranged so as to pour lubricant or to spray lubricant on one or more parts of the mechanical reading system to be lubricated. Even if the dobby is inclined, the arrangement of the mouths of the distributor relative to the parts to be lubricated ensures that the parts to be lubricated, whether for example lateral or central, will still be better lubricated, compared to the mixing of the prior art. . Thanks to the invention, provision can advantageously be made for the mouths to be oriented in the direction of the parts to be lubricated and / or for them to be placed near the parts to be lubricated. The presence of several emission mouthpieces ensures that the lubricant is distributed over all the parts to be lubricated, as desired by the designer of the dobby, in especially regardless of the inclination of the dobby. The arrangement of the mouths ensures that, even if the flow of lubricant supplied to the distributor is relatively low, the lubrication is still ensured for certain parts to be lubricated the most essential, or at least in a more efficient way than in the case of stirring carried out with a low pumping speed, in particular by gravity or by migration of a stream of lubricant emitted.

Preferably, the invention also makes it possible to guarantee a distribution of the lubrication over all of the central parts to be lubricated, for each blade, which reduces premature wear and errors in reading and driving frames during operation. weaving.

Preferably, the mouths are oriented away from the sealing zones of the dobby, or from any other zone which should not be exposed to the lubricant too much. Thus, if the flow of lubricant supplied to the dispenser is high, the risk of accidental projection of lubricant in the direction of these sealing zones is reduced compared to stirring, in particular in the central part of the machine. This reduces, for example, the risk of leakage at the opening of the cover for the passage of the levers. The invention is therefore particularly advantageous for embodiments in which the lubrication system comprises a lubricant pump supplying the distributor with lubricant, and where the flow rate of this pump is subject to the speed of rotation of the shaft. training.

The partial obstructor favors the circulation to a first tubular section by limiting the circulation of lubricant to a second tubular section via the passage section, in order to ensure that, even at low operating speed of the pump, at less the first tubular section is supplied with lubricant, to the detriment of the second tubular section. Nevertheless, in the event of high speed, the second tubular section allows, by overflow, the discharge of the lubricant overflow from the first tubular section out of the distributor, thanks to the mouths of the second tubular section. In the event of high speed, the partial obstructor allows part of the lubricant from the first section to be diverted to the second section in order to avoid an overabundance of lubrication via the first section.

• le système de lisage comprend des parties centrales situées entre le premier plan de support et le deuxième plan de support.
• les embouchures d'émission du distributeur de lubrifiant comprennent des embouchures centrales, qui sont réparties le long d'au moins un tronçon du distributeur, parallèle à l'arbre d'entraînement, les embouchures centrales étant décalées selon la direction de hauteur par rapport aux parties centrales du système de lisage.
• le distributeur comprend un tronçon central portant les embouchures centrales, qui sont réparties entre le premier plan de support et le deuxième plan de support, le tronçon central alimentant en série les embouchures centrales avec du lubrifiant, du premier plan de support au deuxième plan de support.
• le distributeur comprend : un nœud de répartition de lubrifiant ; un premier tronçon dérivé portant une première partie des embouchures centrales, le premier tronçon dérivé s'étendant du nœud de répartition au premier plan de support ; et un deuxième tronçon dérivé portant une deuxième partie des embouchures centrales, le deuxième tronçon dérivé s'étendant du nœud de répartition au deuxième plan de support.
• le système de lisage comprend : un niveleur, qui est mobile entre deux positions distinctes par rapport au bâti, le niveleur étant entraîné dans une oscillation entre les deux positions par rotation de l'arbre d'entraînement, pour chaque dispositif d'entraînement, au moins un bras de lecture respectif qui est mobile en rotation par rapport au bâti, cette rotation étant bornée par une mise en butée d'une patte de butée du bras de lecture contre le niveleur, pour chaque bras de lecture, un organe de rappel élastique de bras, exerçant un effort de rappel élastique contre ledit bras de lecture, tendant à maintenir le bras de lecture en butée contre le niveleur par l'intermédiaire de la patte de butée.
• les parties centrales comprennent les pattes de butée et/ou les organes de rappel élastique de bras.
• le système de lisage comprend des parties latérales situées aux abords du premier plan de support et/ou du deuxième plan de support.
• les embouchures d'émission comprennent au moins une embouchure latérale, disposée dans l'un des plans de support et décalée selon la direction de hauteur par rapport à l'une des parties latérales.
• le système de lisage comprend : un arbre de nivelage, qui s'étend entre le premier plan de support et le deuxième plan de support en étant orthogonal au premier plan de support ; au moins un bras de nivelage s'étendant dans l'un des plans de support et comprenant une liaison pivot par l'intermédiaire de laquelle ledit au moins un bras de nivelage est supporté par l'arbre de nivelage en étant mobile en rotation entre une deux positions autour de l'arbre de nivelage par rapport au bâti ; et au moins un organe de rappel élastique de nivelage, exerçant un effort de rappel élastique tendant à maintenir ledit au moins un bras de nivelage dans l'une des deux positions, l'organe de rappel élastique de nivelage étant disposé dans le même plan de support que ledit au moins un bras de nivelage.
• les parties latérales comprennent : la liaison pivot entre ledit au moins un bras de nivelage et l'arbre de nivelage, les embouchures latérales comprenant une première embouchure latérale décalée selon la direction de hauteur par rapport à la liaison pivot afin de la lubrifier avec du lubrifiant, et/ou l'organe de rappel élastique de nivelage, les embouchures latérales comprenant une deuxième embouchure latérale décalée selon la direction de hauteur par rapport à l'organe de rappel élastique afin de le lubrifier avec du lubrifiant.
• le système de lisage comprend un arbre de lecture, qui est orthogonal au premier plan de support et qui comprend une première extrémité traversée par le premier plan de support et une deuxième extrémité traversée par le deuxième plan de support.
• les parties latérales comprennent la première extrémité et la deuxième extrémité de l'arbre de lecture, les embouchures latérales comprenant : une troisième embouchure latérale décalée selon la direction de hauteur par rapport à la première extrémité ; et une quatrième embouchure latérale décalée selon la direction de hauteur par rapport à la deuxième extrémité.
• le distributeur forme un ensemble solidaire rigide.
• le distributeur comprend deux embouchures de connexion respectivement situées dans le premier plan de support et dans le deuxième plan de support et étant configurées pour être sélectivement connectées à un conduit d'alimentation du distributeur en lubrifiant.
• le distributeur de lubrifiant comprend un tronçon latéral s'étendant dans l'un des deux plans de support, étant décalé selon la direction de hauteur par rapport à la platine qui définit ce plan de support et étant apte à être connecté fluidiquement au circuit de lubrification dans ce plan de support.
• le distributeur définit un plan de symétrie parallèle au premier plan de support et les embouchures sont réparties symétriquement de part et d'autre du plan de symétrie.
• l'obstructeur partiel de la section de passage est une cloison partielle.
• le distributeur comprend des pattes d'encliquetage pour sa fixation sur le bâti.
• le distributeur comprend : un socle, formant les embouchures d'émission, et un couvercle, joint avec le socle, de préférence par encliquetage, au niveau d'un plan de jointure du distributeur, pour former, avec le socle ainsi joint, des conduits de circulation du lubrifiant au sein du distributeur, les conduits s'étendant parallèlement au plan de jointure et étant tous traversés par le plan de jointure, le couvercle étant décalé dans la direction de hauteur par rapport au socle.

Other advantageous characteristics of the invention are defined in the following:

• the reading system comprises central parts located between the first support plane and the second support plane.
• the lubricant distributor's emission mouthpieces comprise central mouthpieces, which are distributed along at least one section of the distributor, parallel to the drive shaft, the central mouthpieces being offset in the height direction with respect to the central parts of the reading system.
• the distributor comprises a central section carrying the central mouths, which are distributed between the first support plane and the second support plane, the central section supplying the central mouths in series with lubricant, from the first support plane to the second support plane .
• the dispenser comprises: a lubricant distribution node; a first branch section carrying a first part of the central mouths, the first branch section extending from the distribution node to the first support plane; and a second branch section carrying a second part of the central mouths, the second branch section extending from the distribution node to the second support plane.
• the leveling system comprises: a leveler, which is movable between two distinct positions relative to the frame, the leveler being driven in an oscillation between the two positions by rotation of the drive shaft, for each drive device, at the at least one respective tone arm which is movable in rotation relative to the frame, this rotation being limited by an abutment of a stop tab of the tone arm against the leveler, for each tone arm, an elastic return member arm, exerting an elastic return force against said tone arm, tending to keep the tone arm in abutment against the leveler by means of the stop lug.
• the central parts include the stop tabs and / or the elastic arm return members.
• the reading system comprises lateral parts located near the first support plane and / or the second support plane.
• the emission mouthpieces comprise at least one lateral mouthpiece, disposed in one of the support planes and offset in the direction of height with respect to one of the lateral parts.
• the smoothing system comprises: a leveling shaft, which extends between the first support plane and the second support plane being orthogonal to the first support plane; at least one leveling arm extending in one of the support planes and comprising a pivot link through which said at least one leveling arm is supported by the leveling shaft while being movable in rotation between a two positions around the leveling shaft relative to the frame; and at least one elastic leveling return member, exerting an elastic return force tending to maintain said at least one leveling arm in one of the two positions, the elastic leveling return member being arranged in the same plane of support as said at least one leveling arm.
• the side parts comprise: the pivot connection between said at least one leveling arm and the leveling shaft, the side mouths comprising a first side mouth offset in the height direction with respect to the pivot connection in order to lubricate it with lubricant , and / or the elastic leveling return member, the side mouths comprising a second side mouth offset in the height direction with respect to the elastic return member in order to lubricate it with lubricant.
• the reading system comprises a reading shaft which is orthogonal to the first support plane and which comprises a first end crossed by the first support plane and a second end crossed by the second support plane.
• the lateral parts comprise the first end and the second end of the reading shaft, the lateral mouthpieces comprising: a third lateral mouthpiece offset in the direction of height with respect to the first end; and a fourth lateral mouth offset in the direction of height with respect to the second end.
• the distributor forms a rigid integral assembly.
• the distributor comprises two connection openings respectively located in the first support plane and in the second support plane and being configured to be selectively connected to a supply duct of the lubricant distributor.
• the lubricant distributor comprises a lateral section extending in one of the two support planes, being offset in the height direction with respect to the plate which defines this support plane and being able to be fluidly connected to the lubrication circuit in this support plan.
• the distributor defines a plane of symmetry parallel to the first support plane and the mouths are distributed symmetrically on either side of the plane of symmetry.
• the partial obstruction of the passage section is a partial partition.
• the dispenser includes latching tabs for fixing it to the frame.
• the dispenser comprises: a base, forming the emission mouthpieces, and a cover, joined with the base, preferably by snap-fastening, at a plane of joint of the distributor, to form, with the base thus joined, ducts for circulating the lubricant within the distributor, the ducts extending parallel to the joint plane and all being crossed by the joint plane, the cover being offset in the height direction relative to the base.

A subject of the invention is also a weaving loom comprising a rotary dobby as defined above.

• la figure 1 est une vue en perspective d'une ratière rotative selon un premier mode de réalisation conforme à l'invention ;
• les figures 2, 3 et 4 sont des coupes partielles selon trois plans parallèles respectifs P9, P10 et P14 de la figure 1;
• la figure 5 illustre un détail de la figure 4 ;
• la figure 6 est une vue en perspective éclatée d'un distributeur de lubrifiant appartenant à la ratière rotative des figures précédentes, un couvercle du distributeur étant omis ;
• la figure 7 est une vue de face du distributeur de la figure 6, avec le couvercle ;
• la figure 8 est une vue en perspective du dessous du distributeur des figures précédentes ;
• la figure 9 est une section transversale d'une partie du distributeur des figures précédentes ;
• la figure 10 est une vue en perspective d'une ratière rotative selon un deuxième mode de réalisation conforme à l'invention ;
• les figures 11 et 12 sont des coupes partielles selon des plans respectifs P9 et P14 de la figure 10 ;
• la figure 13 est une vue en perspective éclatée d'un distributeur de lubrifiant appartenant à la ratière rotative des figures 10 à 12, un couvercle du distributeur étant omis ; et
• la figure 14 est une section transversale d'une partie du distributeur des figures 10 à 13.

Other characteristics of the invention emerge in more detail from the description which follows, given by way of preferred examples of embodiment of the invention without limitation, this description making reference to the appended drawings listed below:

• the figure 1 is a perspective view of a rotary dobby according to a first embodiment according to the invention;
• the figures 2, 3 and 4 are partial sections along three respective parallel planes P9, P10 and P14 of the figure 1 ;
• the figure 5 illustrates a detail of the figure 4 ;
• the figure 6 is an exploded perspective view of a lubricant dispenser belonging to the rotary dobby of the preceding figures, with a dispenser cover omitted;
• the figure 7 is a front view of the distributor of the figure 6 , with the cover;
• the figure 8 is a perspective view from below of the dispenser of the preceding figures;
• the figure 9 is a cross section of part of the dispenser of the preceding figures;
• the figure 10 is a perspective view of a rotary dobby according to a second embodiment according to the invention;
• the figures 11 and 12 are partial sections according to the respective planes P9 and P14 of the figure 10 ;
• the figure 13 is an exploded perspective view of a lubricant dispenser belonging to the rotary dobby of figures 10 to 12 , a dispenser cover being omitted; and
• the figure 14 is a cross section of part of the distributor of figures 10 to 13 .

The figure 1 shows a rotary dobby 1 according to the first embodiment of the invention, for a loom, itself not illustrated.

Like all loom dobby dobby 1 is a loom shed forming machine, the function of which is to actuate the heddle frames to determine the weave of the fabric produced by the loom.

The dobby 1 comprises a frame 3, which constitutes a fixed part of the dobby 1.

We define an orthogonal reference XYZ, including a longitudinal direction X, a transverse direction Y and a direction of height Z, attached to the frame 3 and directed in the three directions of space, in order to better locate the different elements of the dobby 1 in the following.

The frame 3 is a rigid protective part for the dobby 1. The frame 3 is advantageously a foundry part, or possibly a set of mechanically welded parts. A cover, not illustrated, is advantageously fixed to the frame 3. The frame 3 and the cover form an internal volume containing various internal parts of the dobby 1 defined below, in a manner that is substantially impervious to liquids such as lubricant. The frame comprises in particular a bottom 5 and a peripheral wall 7.

Preferably, the bottom 5 extends in a plane parallel to the X and Y directions. The dobby 1 is intended to be fixed and coupled to the structure of the loom for its use for the purpose of weaving various textile articles. The bottom 5 is advantageously designed to be oriented along a horizontal plane, or with a slight angular inclination with respect to such a horizontal plane, when using the dobby 1. At a minimum, the bottom 5 is positioned downwards. dobby 1 when in use, even if it is not horizontal. Provision could nevertheless be made for the bottom to be inclined with respect to the X and Y directions: however, in this case, it is nevertheless provided that the bottom is located downwards when using the dobby 1.

The peripheral wall 7 extends over the entire contour of the bottom 5 and rises from the bottom 5 in the direction of the Z direction. The cover, not shown, is attached over the wall 7 in order to close the frame. 3.

The frame 3 also comprises two support plates 9 and 10, located in the internal volume formed by the bottom 5, the wall 7 and the cover. In the present case, the plates 9 and 10 protrude from the bottom 5 while being fixed relative to the latter. The plates 9 and 10 extend respectively in a plane P9 and in a plane P10 parallel and distant from each other, called “support planes”. The planes P9 and P10 are parallel to the X and Z directions. The plates 9 and 10 extend in the Z direction with respect to the bottom 5, and in a direction opposite to the Z direction with respect to the cover. Preferably, the planes P9 and P10 are defined by the frame as vertical planes, or close to the vertical, and mutually parallel, which may in particular be the case if the dobby 1 is not not inclined to the horizontal. At the very least, the planes P9 and P10 cross the bottom 5, for example by being perpendicular to the bottom or slightly inclined with respect to the bottom 5.

The dobby 1 comprises a common shaft 12, sometimes called the “lever shaft”, supported by the frame 3, inside this frame 3. More precisely, the shaft 12 is offset in the Z direction relative to the bottom 5. and in a direction opposite to the Z direction relative to the cover, being surrounded by the wall 7, in the X and Y directions. In this case, the shaft 12 is supported at its ends by the plates 9 and 10, so that it extends between the planes P9 and P10. Preferably, the shaft 12 is perpendicular to the planes P9 and P10, that is to say parallel to the direction Y. The shaft 12 is preferably fixed in rotation about its axis relative to the frame 3.

For example, the plane P9 is located at the level of the bearing of the shaft 12 on the plate 9, in the direction Y. For example, the plane P10 is located at the level of the bearing of the shaft 12 on the plate 10 according to the Y direction.

The dobby 1 comprises output levers 14, sometimes called "blades". Each lever 14 is preferably flat and thin, for example like a plate. Each lever 14 extends in a respective lever plane P14, parallel to the X and Z directions, or at least perpendicular to the shaft 12, each lever plane being positioned between the planes P9 and P10. Each lever plane extends according to the planar shape of the lever 14 concerned. The levers are arranged side by side along the shaft 12, in the Y direction, being adjacent. Two levers 14, called “extremal levers”, located at the ends of all the dobby exit levers, are adjacent to the plates 9 and 10. In other words, the plates 9 and 10, that is to say - say their respective plane P9 and P10, border the sequence of levers 14. On the figure 1 , only two levers 14, namely the two extremal levers, are shown. In practice, for example between 6 and 16 levers can be provided.

Each lever 14 is supported by the shaft 12 by means of a pivot connection 13 such as a bearing or a bearing, so as to be individually movable in rotation relative to the frame 3 around the shaft 12. In in other words, each lever 14 can be rotated independently of the other levers 14 around the shaft 12. The levers 14 are away from the bottom 5 in the Z direction.

Each lever 14 is partially contained in the frame 3, for a first part carried by the shaft 12, and also comprises a second part 15 in the form of an arm which extends out of the dobby 1 through the cover. For this, the cover comprises openings advantageously provided with sealing means. Through the part 15, each lever 14 can be hitched to a heddle frame of the loom, in order to actuate it and to form the shed, by means of a transmission mechanism not shown, thus determining the weave of the fabric made by the craft.

The dobby 1 comprises a drive shaft 17, sometimes called a “main shaft”. Tree 17 is omitted from the figure 1 , only its axis Y17 being represented, for reasons of clarity of the drawing. Tree 17 is visible in itself on the figures 2 to 4 . Preferably, the shaft 17, that is to say its axis Y17, is perpendicular to the planes P9 and P10, that is to say parallel to the direction Y and to the shaft 12. The shaft 17 is supported by the frame 3, inside this frame 3. More precisely, the shaft 17 is offset in the Z direction relative to the bottom 5 and in a direction opposite to the Z direction relative to the cover, being surrounded by the wall 7, in the X and Y directions. In this case, the shaft 17 is supported at one end in the Y direction, by the plate 10, via a pivot connection of the plate 10, and at a part intermediate of the shaft 17 by the plate 9, via a pivot connection of the plate 9.

Consequently, the shaft 17 extends between the planes P9 and P10. The shaft 17 extends beyond the plane P10 in a direction opposite to the direction Y, so as to be mechanically at means, not shown, for driving the shaft 17 in rotation with respect to the frame 3.

The shaft 17, the rotation of which depends, for example, on the rotation of a modulator, and of a perpendicular control shaft not shown, has a driving function for driving the levers 14 in rotation around the shaft 12 by relative to the frame 3. For this, the dobby 1 comprises, for each lever 14, a mechanical drive device 19, one of which is visible on the figure 4 . Each mechanical drive device 19 is a mechanical transmission and is designed to subject, that is to say link, the rotation of the shaft 17 relative to the frame 3 to an oscillating movement of each rotating lever 14. around shaft 12. This oscillation is performed while the loom is weaving. Each dobby drive device can selectively drive a lever 14 in motion, while this lever 14 is coupled by a mechanical transmission device not shown to a frame of the trade, as explained above. By "oscillation" is meant an alternating back and forth movement in rotation around the shaft 12. Thus, each drive device 19 connects the shaft 17 to one of the levers 14. Geometrically, each device of drive 19 preferably extends entirely, or at least essentially, in the same plane P14 as its associated lever 14, so that the size of the lever 14 and its device associated drive along the Y direction is minimal to allow the stacking of ten to twenty levers 14 between the planes P9 and P10.

Each drive device 19 is contained in the frame 3, that is to say is offset in the Z direction relative to the bottom 5 and in a direction opposite to the Z direction relative to the cover, being surrounded by the wall 7, in the X and Y directions.

• une configuration accouplée, c'est-à-dire embrayée, dans laquelle le dispositif d'entraînement 19 assujettit la mobilité en rotation du levier 14 concerné à la rotation de l'arbre 17 ;
• une configuration découplée, c'est-à-dire débrayée, dans laquelle le dispositif d'entraînement 19 affranchit la mobilité en rotation du levier 14 concerné de la rotation de l'arbre 17.

More specifically, each drive device 19 is configured to operate in two distinct modes, between which each drive device 19 can individually be switched between:

• a coupled, that is to say engaged, configuration in which the drive device 19 subjects the rotational mobility of the lever 14 concerned to the rotation of the shaft 17;
• a decoupled configuration, that is to say disengaged, in which the drive device 19 frees the rotational mobility of the lever 14 concerned from the rotation of the shaft 17.

In other words, when the drive device 19 is in the coupled configuration, the rotation of the shaft 17 sets the lever 14 in motion. In the decoupled configuration of the drive device 19, the lever 14 is not set. in motion by the shaft 17, whether the shaft 17 is rotating or stationary. Preferably, in the decoupled configuration, the lever 14 is held in a fixed position relative to the frame 3, in which the lever 14 was left at the time of the tilting in the decoupled configuration. For example, this position corresponds to a high or low position of the associated frame making it possible to form the crowd.

• un disque d'entraînement 21, qui est centré sur l'axe Y17, qui est solidaire en rotation de l'arbre 17 par rapport au bâti 3 et qui est forme plane, positionnée et orientée selon le plan P14 du levier 14 concerné ;
• un plateau excentrique 23, qui est de forme plane, positionnée et orientée selon le même plan P14, le plateau 23 s'étendant autour du disque 21, en présentant une forme circulaire centrée sur un axe excentrique Y23, excentré et parallèle par rapport à l'axe Y17 ;
• une bielle 25, qui est de forme plane, positionnée et orientée selon le même plan P14, la bielle 25 s'étendant autour du plateau 23 en étant monté mobile en rotation autour de l'axe Y23 du plateau 23, la bielle 25 étant également attelée au levier 14, autour d'une liaison pivot d'axe Y25 parallèle à l'axe Y23.

In order to achieve such an operation, in the preferred example illustrated in the figures, each drive device 19 comprises:

• a drive disc 21, which is centered on the axis Y17, which is integral in rotation with the shaft 17 relative to the frame 3 and which is planar, positioned and oriented along the plane P14 of the lever 14 concerned;
• an eccentric plate 23, which is of planar shape, positioned and oriented along the same plane P14, the plate 23 extending around the disc 21, having a circular shape centered on an eccentric axis Y23, eccentric and parallel with respect to the 'Y17 axis;
• a connecting rod 25, which is of planar shape, positioned and oriented along the same plane P14, the connecting rod 25 extending around the plate 23 while being mounted to be movable in rotation around the axis Y23 of the plate 23, the connecting rod 25 also being coupled to the lever 14, around a pivot connection of axis Y25 parallel to the axis Y23.

In the coupled configuration, the plate 23 is integral in rotation, that is to say fixed in rotation, relative to the disk 21, so as to be driven by the shaft 17. In this coupled configuration, the plate 23 constitutes a crank for driving the connecting rod 25, which in turn drives the lever 14 in an oscillating movement, due to the eccentricity of the axis Y23 with respect to the axis Y17.

In the decoupled configuration, the plate 23 is free to rotate relative to the disc 21, so that any rotation of the shaft 17 does not cause any movement of the plate 23. Consequently, no movement of the connecting rod 25 and of the lever 14 n 'is produced by rotating shaft 17 in this configuration.

To couple or decouple the rotation of the plate 23 and the disc 21, it is possible to implement a coupling / decoupling system for the drive device 19, comprising, for example, a pusher and a pair of bolts actuated by the pusher in order to secure and disconnect the plate 23 and the disc 21 in rotation. An example of a coupling / decoupling system with bolts and push-button, not shown here, is detailed for example in EP 1 845 181 A1 . Any other mechanically equivalent system for joining and disconnecting in rotation the plate 23 and the disc 21, such as a system of hooks, can be implemented.

Likewise, it is possible to implement drive devices 19 operating differently from that described in the present example, without departing from the scope of the invention, provided that these drive devices 19 have the coupled configurations. and decoupled above.

The dobby 1 further comprises a mechanical reading system 30, which has a mechanical selector function. The reading system 30 is contained in the frame 3. More precisely, the reading system 30 is offset in the Z direction with respect to the bottom 5 and in a direction opposite to the Z direction with respect to the cover, being surrounded by the wall 7, in the X and Y directions. As visible on the figure 4 , this reading system 30 extends mainly in the Z direction relative to the drive devices 19 and to the shaft 17, partially surrounding the shaft 17. Preferably, part of the reading system 30 also extends in the X direction with respect to the shaft 17. In the Y direction, the reading system extending from the plane P9 to the plane P10, that is to say along the shaft 17, from plate 9 to plate 10 included. The spatial positioning of the reading system 30 is clearly visible on the figures 1 to 4 .

The reading system 30 is configured to selectively switch the drive devices 19 between the coupled configuration and the decoupled configuration. In other words, each drive device 19 can be individually switched from one configuration to another by the reading system 30, depending on the shed to be formed. For this, the reading system 30 comprises mechanical members which act mechanically directly on the coupling / decoupling system of each drive device 19.

The following describes a preferred embodiment of a reading system 30, even if other types of reading system 30 can be produced.

In the illustrated embodiment, the reading system 30 comprises a shaft 34, called a "reading tree", visible on the figures. figures 1 to 5 , which extends between the planes P9 and P10 while being orthogonal to the latter. In other words, the shaft 34 is preferably parallel to the shafts 12 and 17. The shaft 34 is carried at its ends 36 and 38 by the plates 9 and 10 and is advantageously fixed relative to the frame 3. In d ' In other words, the shaft 34 comprises ends 36 and 38 respectively crossed by the planes P9 and P10.

The shaft 34 is located away from the bottom 5 and the shaft 17 in the Z direction. In other words, the shaft 34 is located between the cover and the shaft 17. Approximately, the shaft 34 is even preferably positioned aligned in the Z direction with respect to the shaft 17. The shaft 34 is offset in both the X and Z directions with respect to the shaft 12.

The reading system 30 comprises for each drive device 19, a respective tone arm 32, one of which is visible on the figure 4 . Each tone arm 32 extends in a plane P32 parallel to the plane P14 of the drive device 19 to be tilted, each plane P32 being situated between two successive planes P14 along the Y direction, as illustrated in figure figure 1 . On the figure 4 , the arm 32 is therefore partially covered by the connecting rod 25.

Preferably, each arm 32 comprises two parts 40 and 42 arranged in a “V” or in an “L”, extending from the shaft 34. Each arm 32 is mounted to be movable in rotation around the shaft 34 relative to the shaft 34. to the frame 3, being supported by the shaft 34 by means of a pivot connection. In a first rotational position of the arm 32, called the “engagement position”, the free end of the part 40 comes into contact with the coupling / decoupling system so as to allow the drive device 19 to last in the decoupled configuration. In a second rotational position of the arm 32, called the “release position”, the free end of the part 40 releases the locking system. coupling / decoupling so as to switch or maintain the drive device in the coupled configuration. This operation is described in more detail in EP 1 845 181 A1 , in which the arm 32 of the present invention is called “oscillating arm 14”, actuating a “pusher 13” of the coupling / decoupling system, also comprising a “first latch 10” and a “second latch 11”. The engagement position is reached, from the disengaged position, by rotation of the arm 32 in a direction R32, shown in figure 4 .

In the illustrated embodiment, the smoothing system 30 comprises a shaft 44, called a "common leveling shaft", visible on the figures. figures 1 to 4 , which extends between the planes P9 and P10 while being orthogonal to the latter. In other words, the shaft 44 is preferably parallel to the shafts 12 and 17. The shaft 44 is carried at its ends 46 and 48 by the plates 9 and 10 and is advantageously fixed relative to the frame 3. In d ' In other words, the shaft 44 comprises ends 46 and 48 respectively crossed by the planes P9 and P10.

The shaft 44 is located away from the bottom 5 in the Z direction, more particularly between the bottom 5 and the cover. The shaft 44 is offset in the X direction relative to the shaft 17, either in line with the X direction, or by being slightly offset in the Z direction relative to the shaft 17. In any case, depending on the X direction, shaft 17 is located between shaft 44 and shaft 12.

Preferably, the reading system 30 comprises for each drive device 19, a respective secondary tone arm 62, one of which is visible on the figure 4 . Each arm 62 extends in the plane P32. On the figure 4 , the arm 62 is therefore found partially covered by the connecting rod 25.

Preferably, each arm 62 comprises two parts 70 and 72 arranged in a “V” or “L” shape, extending from the shaft 44. Each arm 62 is mounted to be movable in rotation around the shaft 44 relative to the shaft 44. to the frame 3, being supported by the shaft 44 by means of a pivot connection. Similar to the arms 32, each arm 62 is movable between a "disengaged position" and an "engaged position", in which the free end of the part 70 is disengaged or comes into contact with a part of the device. drive 19 in order to maintain the coupled or decoupled configuration, or to switch from one configuration to another. The engagement position is reached, from the disengaged position, by rotating the arm 62 in a direction R62 opposite to the direction R32.

Parts 4 and 70 of arms 32 and 62 are diametrically opposed with respect to shaft 17, while parts 42 and 72 are adjacent.

In the illustrated embodiment, the reading system 30 also comprises a leveler 50, which can be described as a “reading stop”, visible from the sides. figures 1 to 5 . The leveler 50 is preferably in the form of a bar or a shaft parallel to the shaft 34 and / or parallel to the shaft 17. The leveler 50 extends between the two plates 9 and 10, c ' that is to say between the planes P9 and P10, so as to cross all the planes P32. The leveler 50 is positioned close to the parts 42 and 72 of the arms 32 and 62, offset in the X and Z directions with respect to these parts 42 and 72. Consequently, the rotation of all the arms 32 is limited, that is, that is to say limited, by the leveler 50, in the same direction of rotation R32. Indeed, the part 42 of each arm 32 comprises, at its free end, a stop tab 43 which abuts against the leveler 50. Satisfying a symmetrical construction of the reading system, the rotation of the arms 62 is limited in the direction rotation R62. Indeed, the part 72 of each arm 62 comprises, at its free end, a stop tab 73 which comes into abutment against the leveler 50.

The reading system 30 comprises, respectively for each arm 32, an elastic return member 33, one of which is visible on the figure 4 and of which two "extremals" are represented on the figure 1 , the others being omitted from the figure 1 . Each member 33 exerts an elastic return force, provided for example by an axial compression spring, mounted in the member 33, in rotation in the direction R32 of the arm 32 concerned. Thus, the arm 32 tends to be brought back and held in abutment against the leveler 50 by the member 33.

The reading system 30 advantageously comprises a guide structure 35, which is fixed to the frame by being offset in the Z direction relative to the arms 32. The structure 35 is preferably fixed to the plates 9 and 10 at its ends in the Y direction. As in the example illustrated, the structure 35 is advantageously in the form of a folded sheet, advantageously conforming to the L or V shape of the arms 32 so as to cover them. Part 39 of the structure 35 is preferably flat and extends in a plane parallel to the plane containing the specific axes of shafts 34 and 44.

The structure 35 preferably comprises a series of guides, formed in the present case by notches 37, to guide the rotation of each arm 32 and ensure that they are maintained in their respective plane P32. To this end, three respective notches 37 are preferably provided for each arm 32. Three respective guide tabs belonging to each arm 32 circulate respectively in these three notches 37 to provide guidance, including a tab 38 and the stop tab 43. In addition, each arm 32 is elastically subjected to the return forces of its respective member 33 via the guide tab 38, passing through the part 39 of the structure 35, as visible on the figure. figure 4 . In Indeed, the part 39 of the structure 35 is preferably interposed between the members 33 and the arms 32. The members 33 are preferably fixed on the part 39 of the structure 35.

The reading system 30 comprises, respectively for each arm 62, an elastic return member 63, one of which is visible on the figure 4 and of which two "extremals" are represented on the figure 1 , the others being omitted from the figure 1 . Each member 63 exerts an elastic return force, provided for example by an axial compression spring, on board in the member 63, in rotation in the direction R62 of the arm 62 concerned. Thus, the arm 62 tends to be brought back and held in abutment against the leveler 50 by the member 63.

The reading system 30 advantageously comprises a guide structure 65, fixed to the frame by being offset in the Y direction relative to the arms 62. The structure 65 is for example fixed to the plates 9 and 10 at its ends in the Y direction. As in the example illustrated, the structure 65 is advantageously in the form of a folded sheet, advantageously conforming to the L or V shape of the arms 62 so as to cover them. A part 69 of the structure 65 is preferably flat and extends in a plane parallel to the plane containing the specific axes of the shafts 34 and 44.

The structure 65 preferably comprises a series of guides, formed in the present case by notches 67, to guide the rotation of each arm 62 and ensure that they are maintained in their respective plane P32. To this end, three respective notches 67 are preferably provided for each arm 62. Three respective guide tabs of each arm 62 circulate respectively in these three notches 67 to provide guidance, including a tab 68 and the stop tab 63. In addition , each arm 62 is elastically subjected to the return forces of its respective member 63 via the guide tab 68, passing through the part 69 of the structure 65, as visible on the figure. figure 4 . Indeed, the part 69 of the structure 65 is preferably interposed between the members 63 and the arms 62. The members 63 are preferably fixed to the part 69 of the structure 65.

The respective parts 39 and 69 of the structures 35 and 65 are advantageously coplanar. The leveler 50 is positioned between the two structures 35 and 65, almost in a plane formed by the shafts 34 and 44.

In the example illustrated, the reading system 30 comprises a leveling arm 80 and a leveling arm 90, visible on the figures 1 , 2 and 3 . As a variant, at least one of the two arms 80 and 90 is provided. Each arm 80 and 90 is carried by a respective end 46 and 48 of the shaft 44, being movable in rotation around the shaft 44 relative to the frame 3. Each arm 80 and 90 preferably extends respectively in one of the planes of P9 and P10, that is to say at the height of the plates 9 and 10 along the Y direction. Each arm 80 and 90 extends along the edge, that is to say the perimeter or the contour, of one of the plates 9 and 10 in their respective plane P9 and P10, being offset in the direction X with respect to the plates 9 and 10. All the arms 62 are arranged between the two arms 80 and 90, in the direction Y. The two arms 80 and 90 have a shape similar to the arms 62, that is to say an L-shape or in V surrounding the shaft 17. In particular, the arms 80 and 90 comprise a respective part 81 and 91, as well as a respective part 82 and 92, which extend from the shaft 44 and are arranged in a V-shape. in their respective plane P9 and P10.

The parts 81 and 91 support the leveler 50 by its two respective ends, the leveler 50 thus being fixed to each of the arms 80 and 90 so as to constitute with these arms 80 and 90 an assembly which is fixedly movable in rotation around the shaft 44. in relation to the frame. Preferably, the fixing of the leveler 50 to the arms 80 and 90 is carried out using two screws 84 and 94 respectively. Each screw 84 and 94 is respectively mounted in a radial thread passing through the leveler 50 and screwed respectively into one of the arms 80 or 90.

The reading system 30 also comprises two cams 83 and 93, supported by the shaft 17, so integral in rotation with this shaft 17. The cams 83 and 93 are omitted from the figure. figure 1 , but are respectively visible to figures 2 and 3 . The cams 83 and 93 are arranged at the ends of the shaft 17, that is to say in the planes P9 and P10, respectively at the height of the arms 80 and 90, in the direction Y. The part 81 and 91 of the arms 80 and 90 respectively carry a roller in rolling contact with the respective raceway of the cams 83 and 93. The shaft 17 therefore actuates the assembly formed by the arms 80 and 90 and by the leveler 50, in rotation around the shaft 44, via the cams 83 and 93. In this case, the respective tread of the cams 83 and 93 are essentially circular, except at the level of two diametrically opposed depressions. When the respective roller of the arms 80 and 90 rolls on the circular portion of the respective tread of the cams 83 and 93, the leveler 50 is in a first position. When the respective roller of the arms 80 and 90 rolls on one of the two depressions of the respective tread of the cams 83 and 93, the leveler 50 passes into a second position, offset in a direction F50 with respect to the first position. The direction F50 is oriented in the X and Z directions, more precisely in an almost orthogonal manner, to the plane comprising the own axes of the shafts 34 and 44, opposite the bottom 5. This displacement is obtained by a rotation of the arms 80 and 90 in one direction R50 illustrated on the figure 2 , reverse with respect to direction R32. By rotation of the shaft 17, the assembly formed by the arms 80 and 90 and by the leveler 50 is driven in oscillation between the two distinct positions twice per revolution of the shaft 17, since two depressions are formed on the cams 83 and 93.

The reading system 30 preferably comprises two elastic return members 85 and 95, called “leveling elastic return members”, respectively supported by the plates 9 and 10 in the planes P9 and P10. Each member 85 and 95 exerts an elastic return force against the leveler 50, at the ends of this leveler 50 in contact with the screws for securing the leveling shaft 44 and the leveling arms 80 and 90. These forces are directed according to the direction F50. Thus, the members 85 and 95 tend to maintain the leveler in its second position, shown in figures 2 to 4 , which makes it possible to maintain the respective contact between the cams 83 and 93 and the rollers of the arms 80 and 90, in particular during the passage of the depressions to raise the shaft 50 in its second position.

When the leveler 50 is in its first position, that is to say in a direction opposite to the direction F50, it maintains the arms 32 and 62 in the disengaged position where the parts 40 and 70 are away from the coupling / decoupling system of their respective drive device 19, that is to say radially away from the shaft 17.

When the leveler 50 is in its second position shown in figures 2 to 4 , that is to say radially furthest from the shaft 17, the leveler 50 allows, for each lever 14, one of the arms 32 and 62 to adopt the engagement position, by respective rotation in the direction R32 and R62. In this engagement position, the parts 40 and 70 come into contact with the coupling / decoupling system of the respective drive device 19 of the arms 32 and 62, in order to engage the uncoupling of the shaft 17 and the eccentric plate 23 This second position of the leveler 50 is reached twice per revolution of the shaft 17, due to the two depressions carried by each cam 83 and 93. The arms 32 and 62 are brought into this engagement position respectively by the members 33 and 63.

• une position de maintien du bras 32 ou 62 concerné dans sa position de dégagement, quelle que soit la position du niveleur 50, comme c'est le cas du bras 32 de la figure 4, la patte 43 ou 73 du bras 32 ou 62 concerné venant alors en butée contre la butée 102 ;
• une position de libération du bras 32 ou 62 concerné, dans laquelle la butée 102 est escamotée, le bras 32 ou 62 étant alors :
  • ∘ amené en position d'engagement si le niveleur 50 l'y autorise, comme c'est le cas du bras 62 de la figure 4, ou
  • ∘ maintenu en position de dégagement sous contrainte du niveleur 50.

The reading system 30 also comprises a selection actuator 100, sometimes called a “selector”, fixed to the frame 3. This actuator 100 is arranged astride the leveler 50, being offset relative to the leveler 50 in the Z direction, preferably in direction F50. The actuator 100 is positioned between the two guide structures 35 and 65. The actuator 100 is supported by the plates 9 and 10 at its ends. The actuator 100 is electronically controlled, depending on the desired crowd, by an electronic controller of the dobby 1 (not shown) or any device similar. The actuator 100 comprises a plurality of stops 102, respectively for each arm 32 and 62, visible on the figures 4 and 5 . Each stop 102 can be moved by the actuator 100, under control of the electronics, between:

• a position for maintaining the arm 32 or 62 concerned in its disengaged position, whatever the position of the leveler 50, as is the case of the arm 32 of the figure 4 , the tab 43 or 73 of the arm 32 or 62 concerned then coming into abutment against the stop 102;
• a position of release of the arm 32 or 62 concerned, in which the stop 102 is retracted, the arm 32 or 62 then being:
  • ∘ brought into the engagement position if the leveler 50 allows it, as is the case with the arm 62 of the figure 4 , or
  • ∘ kept in the release position under constraint of the leveler 50.

Thus, the reading system 30 selects which lever 14 to set in motion under the action of the shaft 17, by electronic control of the actuator 100 and mechanical movement of the arms 32, 62, 80 and 90, as well as the leveler 50 thanks to the shaft 17 itself. Of course, certain elements of the reading system 30 and the drive devices 19 can be modified with respect to the example illustrated here, depending on the application.

The dobby 1 also comprises a system for lubricating the moving parts in the frame 3 and their mutual contacts. The lubrication system comprises a lubrication circuit 111 which advantageously circulates a liquid lubricant in the frame 3, such as a lubricating oil.

This lubrication system comprises a pump 110 for setting the lubricant in motion through the lubrication circuit 111. The pump 110 is advantageously driven at the same time as the shaft 17, for example by the control shaft of the machine, or by an actuator external to the dobby 1, driving the shaft 17. The flow of lubricant supplied by the pump 110 therefore depends essentially on the speed of rotation of the shaft and, by incidence, of the loom. In other words, the speed of the shaft 17 and of the pump are preferably linked. The higher the speed of the pump 110, the greater the flow rate in the circuit 111. The invention therefore provides for the best use of the low flow rate available to supply the parts to be lubricated of the machine, sensitive to the lack of lubricant.

As shown on the figure 1 , the pump 110 is advantageously arranged in the frame 3, being for example fixed to the bottom 5. The pump 110 is preferably positioned along the axis Y17, next to the plate 9, being offset in a direction opposite to direction Y with respect to plate 9. Plane P10 of plate 10 of dobby 1 is therefore opposite to pump 110 and to the drive shaft with respect to plane P10 of plate 10.

The lubrication system also advantageously comprises a filter 112 and a strainer 114 connected in series to the pump 110 via conduits of the lubrication circuit 111. The filter 112 and the strainer 114 are supported by the frame 3. The strainer 114 is connected to the pump 110 upstream, in consideration of the direction of circulation of the lubricant in the lubrication circuit 111, while the filter 112 is connected downstream.

Lubricant is contained within the frame 3, resting or dripping on the base 5, which forms a reserve of lubricant for the lubricant system. Under the action of the pump 110 driven by the shaft 17, this lubricant is sucked through the strainer 114 to the pump 110, in order to then be sent to the filter 112 then to one or more distributor (s) of lubricant of the lubrication system, via the lubrication circuit 111.

Optionally, the shaft 12 forms one of these distributors. In this case, the shaft 12 is hollow and diffuses lubricant to the bearings 13 via orifices distributed along the shaft 12. More details are given on such operation in EP 3 162 935 A1 .

The lubrication system comprises a lubricant distributor 120, which is separate from the shaft 12, for lubricating the smoothing system 30, as well as optionally, possibly as a corollary, the drive devices 19. The distributor 120 is advantageously a member separate from the control shaft, the main shaft 17, the read shaft 34, the common leveling shaft 44 and the leveler 50.

The connections of the lubrication system for transporting and circulating the lubricant between the various components, namely in particular the strainer 114, the filter 112, the pump 110, the distributor 120 and the shaft 12, is provided by several conduits of lubricant belonging to the lubrication circuit 111. These lubricant ducts internal to the frame 3. Once the lubricant has been distributed by the distributor (s), in particular by the distributor 120, it is deposited or trickled onto the base 5 by gravity, it being understood that the bottom 5 is facing down for the use of dobby 1.

The distributor 120 preferably forms a rigid integral assembly, which can thus be installed in one piece in the dobby 1. Preferably, the distributor 120 is made of synthetic plastic.

As explained in more detail in the following, the distributor 120 comprises several lubricant emission mouthpieces for lubricating central parts of the reading system 30, located between the support planes P9 and P10 of the frame, and side parts. of the reading system, located in the support planes P9 and / or P10 of the reading system 30. These parts include in particular the parts to be lubricated by gravity.

The distributor 120 is fixed to the frame 3. In particular, the distributor 120 is fixed to the part 39 of the guide structure 35. Thus, the distributor 120 is offset in the Z direction with respect to this structure 35. The outer casing of the distributor 120 is generally offset in the Z direction, and therefore above, the outer casing of the reading system 30. In this offset configuration, the lubricant emission mouthpieces are plumb with the parts to be lubricated. . This makes it possible to favor the fall of lubricant in the opposite direction of the Z direction, in a direct and precise manner on sensitive mechanical areas, unlike stirring solutions or coarse spraying of lubricant.

Preferably, provision is made for the distance between the plane defined by the shafts 34 and 44 and the mouths of the distributor 120 to be between 5 mm (millimeters) and 50 mm, this distance being measured parallel to the orthogonal of the plane defined by the shafts 34 and 44. Preferably, this distance is measured from the lowest lubricant emission mouth of the distributor 120. This distance is high enough not to impede the circulation of lubricant and the heat exchanges of the parts, while being low enough so that the lubricant precisely reaches the parts to be lubricated.

Advantageously, the aforementioned distance ensures that the dispenser does not interfere with the operation of the moving parts in the dobby, nor does it hamper access to the constituent parts of the reading system, in particular the central and lateral parts, for example for maintenance.

The distributor 120 is advantageously secured by snap-fastening, the distributor 120 comprising for example two latching tabs 126 engaging in orifices 128 of the part 39, at the respective height of the planes P9 and P10 in the direction Y. The distributor 120 is therefore particularly easy to install on the frame 3. Preferably, this fixing is removable so that the distributor 120 can be removed from the dobby 1, in particular to be cleaned or changed.

As a variant, the fixing can be carried out at another point of the frame 3, such as the plates 9 and 10, and / or by another method of fixing than the snap-fit, removable or definitive, for example fixing by screw.

In the preferred embodiment illustrated here, the dispenser 120 comprises only two assembled parts, namely a base 122, visible on the figures. figures 1 to 8 and 10 to 12, and a cover 124, omitted from figures 1 , 6 and 8 to better show the inside of the distributor 120, and visible on figures 2 to 5 , 7 and 9 . The base 122 is the lower part of the distributor 120, located above the plane P120 on the side of the frame, and the cover 124 is the lower part of the distributor located below the plane P120 on the side of the cover. In other words, the cover 124 is offset in the Z direction relative to the base 122. The parts 122 and 124 are assembled, that is to say joined, at a joint plane P120, parallel to a plane comprising the specific axes of shafts 34 and 44, or at least parallel to the Y direction, in particular to the Y17 axis. The plane P120 is therefore inclined with respect to the plane formed by the X and Y directions, between approximately 35 and 55 ° around the Y direction. This distributor 120 is therefore particularly easy to manufacture and to dismantle for maintenance. The joint between the parts 122 and 124 is preferably sufficiently adjusted to be tight against the lubricant during its circulation at high flow rate in the distributor 120. This snap-fastening is preferably removable to allow the part 124 to be dismantled.

• des crochets 123, s'étendant parallèlement au plan P120 en étant répartis le long du contour de jointure du couvercle 124, en étant avantageusement tournés vers l'extérieur du couvercle 124 ; et
• des gorges 125 de réception respectives des crochets 123, s'étendant parallèlement au plan P120 en étant répartis de la même façon le long du contour de jointure du socle 122, la section transversale de chaque gorge 125 permettant de loger l'un des crochets 123.

The integral retention of the parts 122 and 124 is advantageously ensured by mutual snap-fastening of the parts 122 and 124. For this, the parts 122 and 124 have mutual snap-fastening means. In this example, as seen on the figure 9 , these means include:

• hooks 123, extending parallel to the plane P120 while being distributed along the joint contour of the cover 124, while being advantageously turned towards the outside of the cover 124; and
• grooves 125 for the respective reception of the hooks 123, extending parallel to the plane P120 while being distributed in the same way along the joint contour of the base 122, the cross section of each groove 125 making it possible to accommodate one of the hooks 123 .

Alternatively, the hooks 123 and grooves 125 of the present example can be inverted, or arranged differently depending on the application. As a variant, other methods of mutual fixing of the parts 122 and 124 can be provided, providing a removable or definitive fixing of the parts 122 and 124.

The legs 126 are advantageously provided on the base 122, as shown on figure 6 .

In order to ensure correct and stable positioning of the distributor 120 on the part 39, the distributor comprises several support elements 127, such as ribs or feet, advantageously formed of material with the base 122, protruding in the direction of the structure 35. The ribs are preferred because they further enhance the rigidity of the distributor 120. The elements 127 protrude from the base 122 so orthogonal with respect to the plane P120 opposite the Z direction. The distributor 120 rests on the part 39 via these elements 127.

To ensure correct positioning of the distributor 120 in the plane of part 39, the distributor 120 advantageously comprises positioners 129, preferably two positioners 129, which are formed projecting from one of the ribs 127. These positioners 129 are respectively inserted into the orifices 128, that is to say through the structure 35, to ensure that the positioning of the distributor 120 is correct according to the plane P120.

The distributor 120 includes conduits for circulating the lubricant therein. The conduits are intended to distribute and conduct lubricant, supplied by the pump 110, in the distributor 120 in order to distribute this lubricant. In the first embodiment of figures 1 to 9 , these conduits comprise five tubular sections, namely a central section 140 and four lateral sections 141, 142, 143 and 144. The presence of sections 142 and 144 is preferential but optional.

Preferably, each section 140, 141, 142, 143 and 144 is essentially, or even completely, rectilinear. Each section has a cross section of tubular shape, preferably circular or ovoid, as shown for example on figure 9 , in order to form one of the lubricant conduits of the distributor 120.

Preferably, each section 140, 141, 142, 143 and 144, that is to say each lubricant duct of the distributor 120 extends in the plane P120, that is to say that all the cross sections of the conduits are crossed by plane P120. Indeed, each section, over its entire extent, is formed by the combination of the base 122 and the cover 124, the joint of which is advantageously flat. In other words, the network of lubricant conduits of the distributor 120 is flat.

The central section 140 extends essentially parallel to the Y direction, in particular parallel to the Y17 axis. More particularly, as illustrated in the figures, more than the majority of the length of the section 140, in particular in the central part of the section 140, is rectilinear and parallel to the direction Y. The section 140, at least for its rectilinear part, is offset in the Z direction with respect to the reading system 30, in particular by being aligned in the Z direction with the leveler 50, and / or with the legs 43 and / or with the movable stops 102. The section 140, at least for its rectilinear part, is aligned with an edge 41, itself parallel to the Y direction, of the structure 35. More precisely, the section 140 is positioned in alignment with an orthogonal plane with the part 39 and passing through the edge 41. In the present example, the edge 41 is a flanged edge, that is to say curved, orthogonally with the part 39 pointing towards the side. bottom 5 of the frame 3. More generally, the edge 41 forms the notches 37 guiding the tab 43 of the arms 32.

As shown on the figure 1 , the section 140 connects the plane P9 to the plane P10, or at least extends between the plates 9 and 10, in the direction Y.

The sections 141, 142, 143 and 144 extend parallel to a direction S120 of the plane P120, the direction S120 being orthogonal to that of the section 140, that is to say to the direction Y. By convention, the direction S120 , is directed in the direction of the X direction, being inclined towards the bottom 5.

Section 141 is a side section. It extends from one of the ends of section 140 turned in the direction of plane P9, being fluidly connected to section 140 at this location. Close to this fluidic connection, the section 140 advantageously has a non-rectilinear part, preferably curved, in order to optimize the fluidic conduction of the lubricant from the section 141 into the section 140. The section 141 is preferably completely rectilinear and extends , from its connection with section 140, in direction S120.

Section 142 is a side section. It extends from the same end of section 140 as section 141, being fluidly connected to both sections 140 and 141 at this location. The section 142 is preferably completely rectilinear and extends, from its connection with the section 140, in a direction opposite to the direction S120, preferably being coaxial with the section 141. The section 142 preferably carries one of the tabs 126 and one of the positioners 129.

Section 143 is a side section. It extends from another of the two ends of section 140, turned in the direction of plane P10, being fluidly connected to section 140 at this location. Close to this fluidic connection, the section 140 advantageously has another non-rectilinear part, preferably curved, in order to optimize the fluidic conduction of the lubricant from the section 140 into the section 143. The section 143 is preferably completely straight and s' extends, from its connection with the section 140, in the direction S120.

Section 144 is a side section. It extends from the same end of section 140 as section 143, being fluidly connected to both sections 140 and 143 at this location. The section 144 is preferably completely rectilinear and extends, from its connection with the section 140, in a direction opposite to the direction S120, preferably being coaxial with the section 143. The section 144 preferably carries one of the tabs 126 and one of the positioners 129.

The sections 140, 141, 142, 143 and 144 are preferably arranged to form an “H” shaped network in the plane P120.

The section 141 comprises a connection mouth 146, connected to an intake duct 147 belonging to the lubrication system, and fluidly connecting the distributor 120 to the pump 110, which supplies the distributor 120 with lubricant via the section 141. The mouthpiece 146 is preferably directed in the direction S120, coaxially with the section 141. The mouth 146 is preferably positioned in the plane P9, as in the configuration illustrated. The lateral section 141 is also preferably vertically offset in the Z direction relative to the plate 9, and more preferably relative to the guide structures 35 and 65, to the shafts 34 and 44 and to the arms 32 and 62, so that it does not obstruct access to the reading system 30. The lateral section 141 is a lubricant supply section for the distributor 120. Also, the lateral section 141 is aligned with the plane P9 so that its connection mouth 146 is located in the plane P9 and offers a connection to the intake duct 147 in or parallel to the plane P9, without the intake duct 147 extending and undulating on either side of the plate 9. Advantageously, interventions can take place on the machine at the level of the rotating parts, on the leveling arm side 32 and 62 or on the output lever side 14 with respect to the plate 9, without requiring the distributor 120 to be dismantled. Advantageously, the intake duct 147 logged in the plane P9 or close to the plane P9, on top of the plate 9, does not impede access to the mechanical elements located along the plate P9. Likewise, the section 143 is aligned with the plane P10 and offset vertically with respect to the plate 10.

The section 143 comprises a connection mouth 149, which, in the present example, serves as a lubricant outlet, by carrying a flow reduction plug or "diabolo". Alternatively, the mouth 149 could be completely sealed. More generally, the mouthpiece 149 can be partially or completely blocked by an added component, such as a plug or diabolo. As a variant, the distributor 120 may comprise, integrally with the mouth 149, in particular in one piece in the same material as said mouth 149, a partial or complete partition, in order to partially or completely close the mouth 149. This partition is for example formed during the manufacture of the dispenser 120 by injection.

The mouth 149 is preferably directed in the direction S120, coaxially with the section 143 and is therefore parallel to the mouth 146. The mouth 149 is preferably positioned in the plane P10, as in the configuration illustrated. In any event, the mouth 149 could, alternatively to the mouth 146, serve as an inlet mouth, and the section 143 serve as a supply section for the distributor 120. For this, the mouth 149 would be fluidically connected to the inlet duct 147 in place of the mouthpiece 146. To allow this reversal and that one or the other of the side sections 141 or 143 is selectively connected to the inlet duct 147 and incidentally to the lubrication circuit 111 upstream, the mouths 146 and 149 of the lateral sections 141 and 143 advantageously have the same shape, or at least a shape compatible with the same duct 147. Also, the arrangement and orientation of the mouths 146 and 149 is advantageously symmetrical with respect to a median plane of symmetry P121 of the distributor 120, orthogonal to the plane P120 and visible on the figure 7 . By virtue of this possibility of reversal, the same distributor 120 can be mounted on two different dobbies, in reverse arrangement. It is noted that the plane P121 is advantageously parallel to the planes P9 and P10.

Preferably, the sections 141 and 142 are respectively symmetrical to the sections 143 and 144 with respect to the plane P121. Preferably, all or some of the distributor mounting elements, including in particular the elements 126, 127 and 129, are symmetrical with respect to the plane P121. The section 140, advantageously including its rectilinear and curved parts, is preferably symmetrical with respect to the plane P121. Thus the distributor 120 can easily be mounted in several different dobbies of reverse or symmetrical arrangement.

Each lubricant emission mouthpiece is offset in the Z direction with respect to one or more of these parts to be lubricated, in order to pour or spray lubricant thereon. In other words, the emission mouthpieces are respectively vertically offset above the parts which they are configured to lubricate. This requires that each emission mouthpiece is offset in the Z direction relative to the part to be lubricated in question, being either aligned parallel to the Z direction relative to the part to be lubricated, or slightly offset in the X and / or directions. Y.

Preferably, all of the lubricant emitting mouths of the distributor 120 are oriented opposite the Z direction, that is to say in the direction of the bottom 5. This includes that the mouths are turned parallel to the Z direction. , or by being slightly inclined with respect to the Z direction. More generally, it may be preferred that each mouthpiece points in the direction of one or more of the parts to be lubricated of the reading system 30. In the present example, each mouthpiece is oriented. in a direction orthogonal to plane P120, directed towards the bottom 5.

The parts to be lubricated of the smoothing system 30 are preferably the sliding contact zones, in rolling contact and / or serving as a contact surface for abutment. Lubrication may aim to reduce the coefficient of friction of the part to be lubricated. Lubrication can be aimed at cooling the part to be lubricated.

• la liaison comprenant l'une des pattes 43 du bras 32 et son encoche 37 respective,
• la liaison comprenant l'une des pattes 73 du bras 62 et son encoche 67 respective,
• la liaison comprenant l'un des organes 33 du bras 32, sa patte 38 et son encoche 37 respective,
• la liaison comprenant l'un des organes 63 du bras 62, sa patte 68 et son encoche 67 respective,
• la liaison pivot de l'un des bras 32 avec l'arbre 34,
• la liaison pivot de l'un des bras 62 avec l'arbre 44
• la liaison de contact comprenant l'une des pattes 43 du bras 32 et le niveleur 50, et
• la liaison de contact comprenant l'une des pattes 73 du bras 62 et le niveleur 50.

Preferably, the parts to be lubricated of the reading system 30 comprise at least one central part to be lubricated chosen from among the different parts of the following links of the reading system 30:

• the link comprising one of the tabs 43 of the arm 32 and its respective notch 37,
• the link comprising one of the tabs 73 of the arm 62 and its respective notch 67,
• the connection comprising one of the members 33 of the arm 32, its tab 38 and its respective notch 37,
• the link comprising one of the members 63 of the arm 62, its tab 68 and its respective notch 67,
• the pivot connection of one of the arms 32 with the shaft 34,
• the pivot connection of one of the arms 62 with the shaft 44
• the contact link comprising one of the legs 43 of the arm 32 and the leveler 50, and
• the contact link comprising one of the legs 73 of the arm 62 and the leveler 50.

The central parts to be lubricated have in common that they are located between the planes P9 and P10, more precisely between the plates 9 and 10, parallel to the Y direction.

In order to lubricate these central parts to be lubricated, the mouths of the distributor 120 preferably comprise central mouths 130. These mouths 130 are preferably formed by the base 122, as shown in particular on the figures 5 and 6 . In the present embodiment, all the mouths 130 are carried and supplied by the central section 140, in particular by its rectilinear part. The mouths 130 are distributed along the section 140. Preferably, the mouths 130 have a symmetrical distribution with respect to the plane P121. These mouths 130 are directed in a direction orthogonal to the plane P120 and to the plane comprising the own axes of the shafts 34 and 44, being turned in the opposite direction to the Z direction. The mouths 130 are distributed along an axis Y130 shown on the figures 1 and 6 , parallel to the axis Y17 and to the plane P120 and parallel to the rectilinear part of the section 140. Preferably, the mouths 130 are regularly distributed along this axis Y130. All the mouths 130 are arranged between the planes P9 and P10, more precisely between the plates 9 and 10 parallel to the Y direction.

In the present example, only eleven mouthpieces 130 are provided while sixteen levers 14 and sixteen drive devices 19 are provided: each mouthpiece 130 is therefore in charge of the lubrication of parts to be lubricated of the reading system 30 in connection with several levers 14 and drive devices 19, or in other words, distributed in several planes P32.

As a variant, as many central mouthpieces as there are driving devices could be provided, each central mouthpiece then being for example aligned in the same plane P32 or P14 as the part of the reading system 30 associated with the concerned driving device.

As a variant, the number of central mouths could be less than or greater than eleven.

Preferably, the parts to be lubricated of the reading system 30 comprise at least one lateral part to be lubricated chosen from among the following elements of the reading system 30: the pivot connection of the leveling arm 80 with the shaft 44, the pivot connection of the arm leveling 90 with the shaft 44, the member 85 and its contact with the part 82 of the arm 80, the member 95 and its contact with the part 92 of the arm 90, the end 36 of the shaft 34, being understood that the lubricant is preferably conducted along the shaft 34 from the end 36, to lubricate the pivot connections of the arms 32 with the shaft 34, the end 38, for the same reasons, the end 46 of the shaft 44, for the pivot connections of the arms 62, and the end 48, for the same reasons. In general, each lateral part is located near one of the planes P9 or P10, that is to say preferably in one of these planes, or in the immediate vicinity of one of these planes.

In order to lubricate all or part of these lateral parts to be lubricated, the mouths of the distributor 120 preferably comprise side mouths, arranged in the plane P9 and / or in the plane P10, or in the vicinity of these planes. As for the central mouthpieces 130, each lateral mouthpiece is offset in the Z direction with respect to its lateral part (s) to be lubricated.

Preferably, the lateral openings are located in the same plane as the central openings 130, this plane being parallel to the plane P120.

As visible on the figures 2 , 6 and 8 , one can in particular provide a lateral mouth 131, carried and fed by the section 141. This mouth 131 is close to the inlet mouth 146. This mouth 131 is located near one end of the leveler 50. L ' mouthpiece 131 is aligned with part 82 of arm 80 in the Z direction. The lubricant emitted by mouthpiece 131 flows along part 82 until it reaches the pivot connection of arm 80 with shaft 44, thereby lubricating it . Preferably, the member 85 and its contact with the part 82 of the arm 80 are also lubricated by the mouth 131.

As visible on the figures 2 , 6 and 8 , one can in particular provide a lateral mouth 132, carried and fed by the section 142, near the fluid connection with the sections 140 and 141. This mouth 132 is located near the end of the leveler 50 concerned by the mouth 131. The mouth 132 is advantageously offset, in the Z direction, preferably in alignment with the Z direction, with respect to the member 85 and its contact with the part 82 of the arm 80, in order to lubricate these elements. For this, the lubricant poured through the mouth 132 trickles for example on an upper sloping edge of the leveling arm 80 until it reaches the member 85.

As visible on the figures 2 , 6 and 8 , one can in particular provide a lateral mouth 133, carried and fed by the section 142 at its free end. This mouth 133 is offset in the Z direction with respect to the end 36 of the shaft 34, so as to deposit lubricant on the shaft 34. The lubricant is advantageously discharged through the opening 128 of the structure 35. , being guided by the tab 126 and / or the positioner 129 carried by the section 142.

More precisely, the distributor 120 advantageously comprises two fingers 129A. Each finger 129A is near one of the positioners 129 while being longer than the latter, the finger 129A passing through the opening 128, so as to guide the lubricant by trickling down the finger 129A to the lateral part at lubricate.

As visible on the figures 3 , 6 and 8 , one can in particular provide a lateral mouth 134, carried and fed by the section 143. This mouth 134 is symmetrical with the mouth 131 with respect to the plane of symmetry P121. The mouth 134 is close to the mouth 149. This mouth 134 is located near the other end of the leveler 50. The mouth 134 is aligned with the part 92 of the arm 90 in the Z direction. The lubricant emitted through the mouth 134 falls and trickles along the part 92 until it reaches the pivot connection of the arm 90 with the shaft 44 to thus lubricate it. Preferably, the member 95 and its contact with the part 92 of the arm 90 are also lubricated by the mouth 134.

As visible on the figures 3 , 6 and 8 , one can in particular provide a lateral mouth 135, carried and supplied by the section 144, near the fluid connection with the sections 140 and 143. The mouth 135 is preferably symmetrical to the mouth 132 relative to the plane P121. This mouth 135 is located near the end of the leveler 50 concerned by the mouth 134. The mouth 135 is advantageously in the Z direction, preferably in alignment, with respect to the member 95 and its contact with the screw 94 which fixes the shaft 50 to the arm 90, in order to lubricate these elements. To do this, the lubricant discharged from the mouth 135 for example trickles down a sloping upper edge of the leveling arm 90 until it reaches the member 95.

As visible on the figures 3 , 6 and 8 , one can in particular provide a lateral mouth 136, carried and fed by the section 144 at its free end. This mouth 136 is advantageously symmetrical to the mouth 133 with respect to the plane P121. This mouth 136 is offset in the Z direction relative to the end 38 of the shaft 34, so as to deposit lubricant on the shaft 34. The lubricant is advantageously poured through the other opening 128 of the structure. 35, being guided by the tab 126 and / or the positioner 129 carried by the section 144.

In the illustrated configuration of the distributor 120, the lubricant is conducted in the section 141 from the mouth 146 in a direction L141 opposite to the direction S120, which supplies the mouth 131.

A part of the lubricant of the section 141 rushes into the section 140. In this section 140, the lubricant circulates in a direction L140 illustrated on the figure. figure 6 , directed parallel and in the same direction as the direction Y. The mouths 130 are thus supplied in series by the section 140, successively in the direction L140 and downstream of the mouth 131. Another part of the lubricant is engulfed in the section 142 in a direction L142, if the flow of lubricant supplied by the pump 110 is sufficient. The mouths 132 and 133 are then supplied successively, in series with one another, and in bypass with respect to the mouths 130. The mouths 132 and 133 are supplied downstream from the mouth 131.

The distributor 120 being inclined relative to the plane defined by the X and Y directions, the sections 142 and 144 are offset in the Z direction relative to the other sections, in particular relative to the sections 141 and 143, so that, due to gravity makes it harder for the lubricant to reach them.

The distributor 120 advantageously comprises a partial partition 148, only partially obstructing the tubular passage section leading to the section 142 from the sections 141 and 140, at their fluidic connection node. This partial obstruction 148 is advantageously formed projecting from the base 122 and extends vertically to form an obstacle with a height greater than the level of lubricant contained in the section 141 at low speed. The obstructor 148 advantageously has a curved shape in the extension of the curved part of the central section 140. Thus, the obstructor 148 limits the circulation of lubricant to the section 142, favoring the circulation up to the section 140, in order to '' ensure that, even at low operation of the pump 110, at least the section 140 is supplied with lubricant, to the detriment of the section 142. However, in the event of high speed, the section 142 allows by overflow the evacuation of the lubricant overflow of the section 140 out of the distributor 120, thanks to the mouthpieces 132 and possibly to the mouthpieces 133. In the event of high speed, the section 142 thus makes it possible to divert part of the lubricant to limit the supply beyond the partial partition 150 at the level of the section 140 and l lubricant emission at the central mouths 130.

Having traveled the section 140 to its end on the side of the plane P10, an essential part of the lubricant of the section 140 rushes into the section 143 in the direction L143, directed like the direction S120. The mouth 134 is thus fed to the section 143, downstream of the mouths 130. The excess is discharged via the mouth 149, for example in the form of a peripheral thread around the perimeter of the dolly. It is preferred that the mouth 149 is positioned in alignment with the end 48 of the shaft 44 in the Z direction, so that the mouth 149 supplies lubricant to this end 48. The lubricant network formed by the distributor 120 therefore extends between the mouth 146 located directly above the plate 9 in the plane P9, and the mouth 149, located directly above the plate 10 in the P10 plane.

It is possible that part of the lubricant coming from the section 140 rushes into the section 144 in a direction L144, opposite to the direction L143, if the flow of lubricant supplied by the pump 110 is very high. The mouths 135 and 136 are then supplied successively, in series with each other, and bypass with respect to the mouths 134 and 149. The mouths 135 and 136 are supplied downstream of the mouth 131. Symmetrically to the obstructor 148, The distributor 120 advantageously comprises a partial partition 150 serving as a partial obstruction of the section 144, thus limiting the amount of lubricant supplied to it.

As a variant, another embodiment can be provided to form the obstructions, rather than partial partitions, as long as only part of the passage section of the section concerned is obstructed.

As a variant, provision can be made to replace all or part of the side openings 131, 132, 133, 134, 135 and 136, individually, by two lateral openings close to each other, distributed in the direction S120, in order to ensure that at least one of these two mouths is found aligned vertically with a desired lateral lubricating part, for several orientations around the Y axis of the dobby 1, in particular to provide for the eventuality that the Z direction is not vertical when using dobby 1. One of the two mouths can then be blocked in situ, the other left free, when we know the effective orientation of dobby 1 around direction Y.

The distributor 120 is advantageously entirely symmetrical with respect to the plane P121 so as to be able to be mounted in an inverted manner in another dobby having a symmetrical arrangement of its various elements, for example the dobby 201 illustrated in figures 10 to 14 . However, in this dobby 201 of figures 10 to 14 , another distributor 320 was mounted according to a second embodiment according to the invention, as explained below. When the distributor 120 is mounted in reverse, the circulation is carried out along a path symmetrical, with respect to the plane P121, to that defined by the directions L140, L141, L142, L143 and L144 so that the parts of the machine are advantageously supplied in the same way despite differences in the flow rates of the lubrication system.

Except for the distributor 320 replacing the distributor 120, the dobby 201 is at all points symmetrical with respect to the dobby 1 around a plane parallel to the X and Z directions and symmetrically has the same characteristics, some of which are again referenced on figures 10 to 14 . When these references are indicated on the figures 10 to 14 , they bear the same number as those of the corresponding characteristics on the figures 1 to 9 . The description of the dobby 1 above therefore applies to the dobby 201, by reversing the direction of the Y direction, except with regard to the distributor 320, the differences of which with the distributor 120 are described below. The X and Z directions remain the same as in the above description. The drive shaft, the pump, the strainer, the filter and any other aforementioned element are found reversed with respect to the position of the loom and the frames not shown due to the reversal of the Y direction.

The distributor 320, like the distributor 120, is advantageously entirely symmetrical with respect to a median plane of symmetry P321, parallel to the planes P9 and P10.

The distributor 320 preferably forms a rigid integral assembly with a base 322 and a cover 324 joined at a joint plane P320, orthogonal to the plane P321, in a similar manner to the distributor 120. The base 322 and the cover 324 include hooks. 323 similar to hooks 123, interacting with not shown grooves, similar to grooves 125, for the same function. The distributor 320 is mounted on the part 39 of the structure 35 in the same way as the distributor 120, in the same orientation, using means similar to the means 126, 127 and 129. In the same way as one has defined direction S120 in view of plane P120, we define direction S320 in view of plane P320, as shown on figure 13 .

The distributor 320 includes lubricant circulation conduits therein like the distributor 120, to distribute and conduct the lubricant supplied by the pump 110 and to distribute it. In this second embodiment of figures 10 to 14 , these conduits comprise seven tubular sections, including a central section 340 and six other sections 341, 342, 343, 344, 341A and 343A. Preferably, each of the sections is essentially, or even completely, rectilinear, except for the sections 342 and 344 which are partially curved.

The distributors 120 and 320 are advantageously made up of sections for distributing the lubricant to a maximum of sensitive mechanical points of the reading system and of the machine, without being bulky or covering the mechanical assembly, which it is preferable to leave accessible to the user. maintenance.

Each section has a cross section of tubular shape, preferably circular or ovoid, as shown for example on figure 14 , in order to form one of the lubricant conduits of the distributor 320, except possibly the section 340, as defined below.

Preferably, each section of distributor 320 extends in plane P320, like the sections of distributor 120.

The central section 340 extends parallel to the direction Y17, being offset in the Z direction relative to the reading system 30. The section 340 is in particular aligned in the Z direction with the members 33 that it feeds through its 330 central mouthpieces, as shown on figure 12 . The section 340 is set back from the edge 41. The section 340 connects the plane P9 to the plane P10, or at least extends between the plates 9 and 10, in consideration of the direction Y.

Sections 341 and 343 are similar to sections 141 and 143, respectively. In particular, the sections 341 and 343 are lateral sections, extend parallel to the direction S320 respectively in the planes P10 and P9. The sections 341 and 343 respectively carry a connection mouthpiece 346 and 349, with the same characteristics as the mouthpieces 146 and 149. In the present example, it is the mouthpiece 349 which is connected to the duct 147, while the diabolo partially blocks off. the mouth 346. The lubricant network formed by the distributor 320 therefore extends between the mouth 349, directly above the plate 9 in the plane P9, and the mouth 346, directly above the plate 10 in plane P10. The plane P10 of the plate 10 of the dobby 1 is opposite the pump 110 and the control shaft with respect to the plane P10 of the plate 10.

The sections 341 and 342 extend in the plane P10, while the sections 343 and 344 extend in the plane P9.

The sections 341 and 343 are fluidly connected to the section 340 respectively by means of the sections 341A and 343A, respectively at their end opposite the mouths 346 and 349. The sections 341A and 343A are connected to the section 340 at a distribution node 340A of the distributor 320, located at plane P321. More precisely, the section 341A is connected to the section 340 in the Y direction with respect to the plane P321 while the section 341A is connected to the section 340 on the other side of the plane P321. Each section 341A and 343A extends in an oblique direction of the plane P320 with respect to the Y axis, so that the sections 341A, 343A and 340 form a network in the form of “K”. The section 340 can therefore be separated into two branch sections 340B and 340C, on either side of the plane P321.

The section 342, is a lateral section comparable to the section 142, is fluidly connected to the section 340B and extends, from the section 340B, in the direction S320, so as to be, at its other end, coaxial with the section 341 The tubular section of the sections 341 and 342 is continuous, but the sections 341 and 342 are fluidly separated, a complete partition 348 completely closing off access to the section 342 directly from the section 341.

The section 344, is a lateral section comparable to the section 144, is fluidly connected to the section 340C and extends, from the section 340C, in the direction S320, so as to be, at its other end, coaxial with the section 343 The tubular section of the sections 343 and 344 is continuous, but the sections 343 and 344 are fluidly separated, a complete partition 350 completely closing off access to the section 344 directly from the section 343.

In the present case, the distributor 320 is supplied via the mouthpiece 349, so that the lubricant progresses in the section 343 in a direction L343 in the opposite direction to the direction S320. The lubricant is then conducted in the section 343A while being directed towards the node 340A, that is to say towards the plane P321.

The distributor 320 comprises several emission mouthpieces carried by the base 322, oriented in the direction of the base 5 along an axis orthogonal to the plane P320.

The emission mouthpieces include central mouthpieces 330, carried and fed by the section 340, being regularly distributed along an axis Y330 parallel to the direction Y. More precisely, as many mouthpieces 330 as there are levers 14 are provided. , the mouths 330 being respectively arranged in the respective planes P32 or P14 associated with these levers 14.

The section 340B carries and supplies a first part of the mouths 330, namely eight, while the other section 340C carries and supplies the others. In sections 340B and 340C, the lubricant circulates antagonistically in directions L340B and L340C, in the direction of planes P9 and P10, from node 340A, which supplies these sections 340B and 340C. The mouths 330 of the section 340B are therefore supplied in series successively from the node 340A to the plane P10, while the mouths 330 of the section 340C are supplied in series successively from the node 340A to the plane P9.

As an exception, section 340 optionally presents, as visible on the figures 13 and 14 , a cross section in the shape of a bridge, or in the shape of an inverted "U", the wall of the pedestal 322 being deformed inwardly of the tubular shape, in the Z direction, so as to form a longitudinal dam 380, parallel to direction Y. The dike 380 advantageously does not extend beyond the plane P320. In the central part, parallel to the Y direction, of section 340, dike 380 is extended by a partial partition 381, which extends over only a part, for example along only half, of dike 380. The summit of the partial partition 381 extends at a small distance from the cover 324, beyond the plane P320, nevertheless leaving a gap for passage of lubricant from one side to the other of the partition 381 between the latter and the cover 324. The partition 381 advantageously separates the section 340 into two lower and upper parallel gutters. The mouthpieces 330 are advantageously formed in the direction opposite to the direction S320 relative to the partition 381. Also, the central extremity mouths 330 are favored in their supply of lubricant, by the existence of the partial partition 381. Thanks to this arrangement , the lubricant supplied by the node 340A is distributed more evenly between the mouthpieces 330 by the overflow of the lower gutter, even for a low speed of the pump 110. Then, the mouthpieces 330 can be supplied in a different order from that mentioned above. -before. This effect can be further accentuated by the presence of obstructors 351 and 352, formed here by respectively by partial partitions, to partially block the respective lateral ends of the central sections 340B and 340C, in order to limit the transmission of lubricant to the sections 342 and 344, especially if the lubricant flow rate is low. The obstructions 351 and 352 preferably protrude from the base 322. In particular, the obstructions 351 and 352 extend vertically to form obstacles of a height greater than the level of lubricant contained in the section 340 at low speed.

As for the example of distributor 320, the construction of a “K” distributor thus has the advantage of equitably distributing the mouths of the derivative sections. from the plane of symmetry P321 to the planes P9 and P10 symmetrically, unlike the "H" distributor, where the central section leads the lubricant to the mouths in series between the plane P9 and the plane P10. Thus, with a distributor whose central duct is supplied through the middle of the distributor, at the level of the distributor's plane of symmetry, or by a distribution node positioned in the plane of symmetry, the distribution of the lubricant is guaranteed more equitably. along the Y axis between the two halves of the reading system 30. Lubrication is therefore improved.

As shown on the figure 12 , the mouths 330 are advantageously aligned in the Z direction relative to the members 33 and the tabs 38 in order to lubricate them. The lubricant emitted can also advantageously run off, in particular along part 39 of structure 35 in order to also lubricate legs 43, or along arms 32 to lubricate their pivot connection with shaft 34.

The mouths of the distributor 320 also include lateral mouths, arranged in the plane P9 and / or in the plane P10, or in the vicinity of these planes.

A lateral mouthpiece 334 with the same function and in the same position as the mouthpiece 134 is carried and supplied by the section 343.

If the flow rate is sufficient, a small part of the lubricant from section 340 is transmitted to section 341A in the direction of plane P10, in a direction L341A. The lubricant then circulates in the section 341 in a direction L341 in the same direction as the direction S320. As visible on the figures 11 and 13 , a lateral mouthpiece 331 can be provided, carried and supplied by the section 341, for the same function and arrangement as the mouthpiece 131. Lubricant can also be emitted for example in the form of a peripheral thread around the periphery of the dolly carried by mouthpiece 346.

Part of the lubricant circulating in the section 340 is transmitted to the sections 342 and 344. Each of the sections 342 and 344 carries a pair of side mouths, 332 and 333, as seen in figures 11 and 13 . For each section 342 and 344, the mouths 333 and 332 are supplied successively in series, the mouth 333 being upstream of the mouth 332.

The presence of the two mouths 332 and 333 makes it possible to distribute the supply of lubricant along the plates 9 and 10, so that all the lateral parts to be lubricated can be lubricated, even if the dobby 201 is inclined around its Y axis. Indeed, for each section 342 and 344, at least one of the two mouths 332 and 333 is found aligned vertically respectively with the member 85 and the member 95.

The lubricant contained in the sections 342 and 344 is completely discharged via the mouths 332 and 333, advantageously without entering the sections 341 and 343, because of the complete partitions 348 and 350.

Also, the mouths 332 and 333 allow, symmetrically with respect to the plane P321, to evacuate the lubricant overflow of the section 340 out of the distributor 320 in the event of a high flow rate. In particular, the sections 342 and 344 thus make it possible, by overflow, to distribute the supply of lubricant beyond the partial partitions 351 and 352 in order to limit the emission of lubricant at the central openings 330.

Thanks to the particular geometry of the two distributors 120 and 320 described above, all the orientations with respect to the ground generally implemented for the dobby do not prevent fair lubrication at least of the central parts to be lubricated. This fair lubrication is obtained despite any inclination of the dobby 1, for example around the X axis between -5 and 5 ° and / or around the Y axis between -20 and 20 °.

Thus, the distributor 120 and the distributor 320 each constitute a distribution assembly which brings together the lubricating functions of all the parts of the reading system 30. The distributors 120 and 320 advantageously take advantage of the volume of incoming lubricant available. from a single inlet of the lubrication circuit 111, to the mechanism to be lubricated. The lubricant can therefore be distributed by one of the distributors 120 or 320, whatever the necessary configuration of the dobby, and the speed regime maintained by the loom. Each of the distributors 120 and 320 is an integrated assembly, quickly operational, requiring no accessory, no additional tool, or adjustment for its installation, maintenance or operation.

As a variant, the distributor may comprise additional sections than those described above, also provided with emission mouthpieces, in order to supply lubricant to other parts of the dobby, which may belong to organs which are not. the reading system 30.

As a variant, the connection mouthpieces may have a shape different from those described above. For example, the connection mouthpieces are bent, or incorporate quick connection means, screw connection. Rather than the conduit 147 which forms a flexible pipe, the distributor can be connected to a channel provided directly in the frame and connected to the pump. As a variant, this channel can be partially formed in the frame between the connection mouth of the distributor and the pump, for example in the plane P9 through an upper edge of the plate 9.

Alternatively, two or more connection mouths can be connected to the lubrication circuit so as to feed the distributor via different sources of lubricant supply. For this variant, a symmetrical distributor construction is preferred where the mouths are symmetrically distributed with respect to the plane of symmetry P121 or P321. For example, the two connection mouthpieces 146 and 149 could both serve at the same time for the admission of lubricant to the distributor, and not selectively as illustrated.

As a variant, the arrangement and the shape of the emission mouthpieces may vary from the aforementioned examples. The shape of the mouths can vary within the same section of the distributor. For example, a mouth can be formed by a slot or a hole formed in the base of the dispenser, to perform the function of dispensing lubricant for the machine.

Claims (15)

1. A rotary dobby (1; 201) for a loom, the rotary dobby (1; 201) comprising:

   - a frame (3) comprising a bottom (5), as well as a first and a second platen (9; 10) respectively defining a first support plane (P9) and a second support plane (P10) passing through the bottom (5), while being parallel to and distant from one another;

   - a lubrication system (110, 112, 114, 147) comprising a lubrication circuit (111) and a pump (110) for circulating lubricant in the lubrication circuit (111);

   - a common shaft (12), supported by the frame (3) and extending between the first support plane (P9) and the second support plane (P10);

   - output levers (14), mounted rotating around the common shaft (12) between the first and the second support planes, and driven in alternating oscillation movements during weaving;

   - a drive shaft (17) for driving the output levers, supported by the frame (3) and extending between the first support plane (P9) and the second support plane (P10);

   - mechanical drive devices (19) mounted around the output shaft (17), each drive device being configured to switch between:

   ∘ a coupled configuration, in which the drive device (19) subjects the rotational mobility of one of the output levers (14) to the rotation of the driveshaft (17), and

   ∘ an uncoupled configuration, in which the drive device (19) frees the rotational mobility of said output levers (14) from the rotation of the driveshaft (17);

   - a reading system (30), configured to selectively switch the drive devices (19) between the coupled configuration and the uncoupled configuration, the driveshaft (17), the common shaft (12), the drive devices (19) and the reading system (30) being offset in a height direction (Z) relative to the bottom (5);

   characterized in that the lubrication system (110, 112, 114, 147) comprises a lubricant distributor (120; 320), which is separate from the common shaft (12), and which comprises several lubricant emission mouths (130-136; 330-334), which are supplied with lubricant by the lubrication circuit (111) and which are offset in the height direction (Z) relative to the reading system (30), and
   in that the distributor (120; 320) comprises at least two tubular segments (141, 142; 340, 340B) each bearing at least one of the emission mouths (131, 132; 330, 333), the two tubular segments being fluidly connected to one another at a passage section, the passing of lubricant from one segment to the other being limited by a partial obstructer (148, 150; 351, 352) of the passage section, for example a partial partition.
2. The rotary dobby (1; 201) according to claim 1, characterized in that:

   - the reading system (30) comprises central parts (32, 33, 37, 38, 43, 44, 62, 63, 67, 68, 73) situated between the first support plane (P9) and the second support plane (P10); and

   - the emission mouths (130-136; 330-334) of the lubricant distributor (120; 320) comprise central mouths(130; 330), which are distributed along at least one segment (140; 340) of the distributor, parallel to the driveshaft (17), the central mouths being offset along the height (Z) direction relative to the central parts of the reading system.
3. The rotary dobby (1) according to claim 2, characterized in that the distributor (120) comprises a central segment (140) bearing the central mouths (130), which are distributed between the first support plane (P9) and the second support plane (P10), the central segment (140) supplying, in series, the central mouths (130) with lubricant, from the first support plane (P9) to the second support plane (P10).
4. The rotary dobby (201) according to claim 2, characterized in that the distributor (320) comprises:

   - a lubricant distribution node (340A);

   - a first bypass segment (340B) bearing a first part of the central mouths (330), the first bypass segment extending from the distribution node to the first support plane (P9); and

   - a second bypass segment (340C) bearing a second part of the central mouths (330), the second bypass segment extending from the distribution node to the second support plane (P10).
5. The rotary dobby (1; 201) according to any one of claims 2 to 4, characterized in that:

   - the reading system (30) comprises:

   ∘ a leveler (50), which is movable between two separate positions relative to the frame (3), the leveler being driven in an oscillation between the two positions by rotation of the driveshaft (17),

   ∘ for each drive device (19), at least one respective reading arm (32, 62) that is rotatable relative to the frame (3), this rotation being bounded by an abutment of a stop tab (43, 73) of the reading arm against the leveler,

   ∘ for each reading arm, an arm resilient return member (33, 63), exerting a resilient return force against said reading arm, tending to keep the reading arm abutting against the leveler via the stop tab; and

   - the central parts (32, 33, 37, 38, 43, 44, 62, 63, 67, 68, 73) comprise the stop tabs and/or the arm resilient return members.
6. The rotary dobby (1; 201) according to any one of the preceding claims, characterized in that:

   - the reading system (30) comprises lateral parts (34, 36, 38, 46, 48, 80, 82, 85, 90, 92, 95) situated in the vicinity of the first support plane (P9) and/or the second support plane (P10); and

   - the emission mouths (130-136; 330-334) comprise at least one lateral mouth (131-136; 331-334), arranged in one of the support planes (P9, P10) and offset in the height direction (Z) relative to one of the lateral parts.
7. The rotary dobby (1; 201) according to claim 6, characterized in that:

   - the reading system (30) comprises:

   ∘ a leveling shaft (44), which extends between the first support plane (P9) and the second support plane (P10) while being orthogonal to the first support plane (P9);

   ∘ at least one leveling arm (80, 90) extending in one of the support planes (P9, P10) and comprising a pivot link by means of which said at least one leveling arm is supported by the leveling shaft while being rotatable between one [of] two positions around the leveling shaft relative to the frame (3); and

   ∘ at least one leveling resilient return member (85, 95), exerting a resilient return force tending to keep said at least one leveling arm in at least one of the two positions, the leveling resilient return member being arranged in the same support plane as said at least one leveling arm;

   - the lateral parts (34, 36, 38, 46, 48, 80, 82, 85, 90, 92, 95) comprise:

   ∘ the pivot link between said at least one leveling arm and the leveling shaft, the lateral mouths comprising a first lateral mouth (131, 134; 331, 334) offset in the height direction (Z) relative to the pivot link so as to lubricate it with lubricant, and/or

   ∘ the leveling resilient return member, the lateral mouths comprising a second lateral mouth (132, 135; 332, 333) offset in the height direction (Z) relative to the resilient return member in order to lubricate it with lubricant.
8. The rotary dobby (1) according to any one of claims 6 or 7, characterized in that:

   - the reading system (30) comprises a reading shaft (34), which is orthogonal to the first support plane (P9) and which comprises a first end (36) passed through by the first support plane (P9) and a second end (38) passed through by the second support plane (P10);

   - the lateral parts comprise the first end and the second end of the reading shaft, the lateral mouths comprising:

   ∘ a third lateral mouth (133, 136) offset in the height direction (Z) relative to the first end; and

   ∘ a fourth lateral mouth (133, 136) offset in the height direction (Z) relative to the second end.
9. The rotary dobby (1; 201) according to any one of the preceding claims, characterized in that the distributor (120; 320) forms a rigid cohesive assembly.
10. The rotary dobby (1; 201) according to any one of the preceding claims, characterized in that the distributor (120; 320) comprises two connecting mouths respectively situated in the first support plane (P9) and the second support plane (P10) and being configured to be selectively connected to a supply pipe (147) of the lubricant distributor.
11. The rotary dobby (1; 201) according to any one of the preceding claims, characterized in that the lubricant distributor (120; 320) comprises a lateral segment (141, 143) extending in one of the two support planes (P9, P10), being offset in the height direction (Z) relative to the platen (9, 10) that defines this support plane and being able to be fluidly connected to the lubrication circuit (111) in this support plane.
12. The rotary dobby (1; 201) according to any one of the preceding claims, characterized in that:

    - the distributor (120; 320) defines a plane of symmetry (P121, P321) parallel to the first support plane (P9) and

    - the mouths (130-136, 146, 149; 330-334, 346, 349) are distributed symmetrically on either side of the plane of symmetry.
13. The rotary dobby (1; 201) according to any one of the preceding claims, characterized in that the distributor (120; 320) comprises snapping tabs (126) to fasten it on the frame (3).
14. The rotary dobby (1; 201) according to any one of the preceding claims, characterized in that the distributor (120; 320) comprises:

    - a base (122; 322), forming the emission mouths (130-136; 330-334), and

    - a lid (124; 324), joined with the base, preferably by snapping, at a connecting plane (P120; P320) of the distributor (120; 320), to form, with the base thus joined, lubricant circulation pipes within the distributor (120; 320), the pipes extending parallel to the connecting plane and all being passed through by the connecting plane, the lid being offset in the height direction (Z) relative to the base.
15. A loom comprising a rotary dobby (1; 201) according to any one of the preceding claims.

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