FR2818954A1 - Multi-line bar device for flying sails and kites comprises two fixed and two movable half bars and brake line guide mounted at end of arms by wrists - Google Patents

Abstract

The device is composed of two fixed half bars (3), supports for front lines (9'), mounted on a body (1) and two movable half bars (12), supports for brake lines (9). The brake lines pass through a guide (21) mounted at the end of body arms (11) by means of wrists (4). The harness end (7) looped in a central line (9) outer pulley (10) is then guided by pulleys (14,35), leaves the wrist and is coupled to the other wrist by an ejector part (6) fixed to its end.

Description

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MULTI-LINK BAR DEVICE WITH LENGTH FOR
The present invention relates to a device for driving safely attached to the harness all types of Wings and tow kites.

posée en douceur qu'en bordur de fenêtre limitant ainsi l'aire d'atterissage. Concernant le pilotage en trois lignes : ce montage OBLIGE l'utilisateur à s'accrocher au bout de harnais de la ligne centrale afin de pouvoir régler l' incidence de son Aile et donc sa puissance et maniabilité. Ors, dans tous les cas de montage en deux, trois ou quatre lignes, toute personne utilisant le harnais est exposée aux risques de rester accroché au bout de harnais lors d' une sur-puissance incontrôlée de l'Aile du à une survente ou à une erreur de pilotage. Dans ce cas l'Aile provoque une tension et une traction constante du bout de harnais sur le crochet du harnais empêchant ainsi tout décrochage de l' utilisateur et donc toute neutralisation de vol de l'Aile par lâchage de la barre

de pilotage. L'utilisateur peut être alors tramé brutalement et risquer un acci- dent grave lors d'un choc violent suite à un envol non maîtrisé. People practicing flying Wings and traction kites face problems specific to different driving modes and safety problems. Concerning the four-line steering: the two individual grips used for the piloting are due to their mobility technically very uncomfortable for the practice of jumping. Their use is also very stressful for the wrists when the wing is in full power. In the case of mounting in two and three lines the Wing can not be

posed smoothly that bordur of window thus limiting the landing area. Concerning the three - line piloting: this assembly OBLIGES the user to hang on the end of harnesses of the central line in order to be able to adjust the incidence of his Wing and thus his power and maneuverability. However, in all cases of assembly in two, three or four lines, anyone using the harness is exposed to the risk of hanging on the end of harness during an uncontrolled over-power of the Wing due to overselling or a steering error. In this case the Wing causes a tension and a constant pull of the harness end on the hook of the harness thus preventing any stall of the user and therefore any neutralization of flight of the Wing by dropping the bar

piloting. The user can then be ruptured and risk a serious accident during a violent shock following an uncontrolled flight.

 The object of the present invention is to remedy these drawbacks and to propose a device enabling easier and more efficient steering while remaining attached to the end of a harness which can be released under any circumstances and at any time.

 The device according to the present invention comprises according to a first feature a bar support on which is mounted two fixed half bars and two movable half bars, one of which comprises on its knuckle wrist a hooking mechanism and tip release and another end guide member allowing the device to slide along said tip.

 The bar support, consisting of a body extended by two spaced apart fixed arms forming an inverted U, has between its clearances and inner walls a tip guide pulley and an end cam cleat; the clearances allowing the passage of the end of harness.

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On the blanks of the body, are mounted fixed and aligned, two half bar (said upper bars) having: line fixing holes and each at their end, a line guide.

 At the end of each arm is mounted integral with the arm, by means of an axis of articulation a wrist body on which is fixed a half bar (called moving bar) having at its end a line fixing hole.

sous l'effet de tension du bout de harnais. Lorsque par pression sur le manchon, celui-ci : bascule, se dégage de ses points de blocage et s'abaisse, l' espace s'élargit entre le point de retenu de la pièce éjectable sur le manchon et le point d'appui de la pièce éjectable sur l'organe d'appui. Dès que l' ouverture est plus grande que la section de passage de la pièce éjectable, la pièce éjectable se dégage du mécanisme et engendre ainsi le largage du bout de harnais. One of the two wrist bodies has a hooking mechanism and release tip consisting of one hand of a movable sleeve and tilting retained locked by means of a shoulder of the wrist body and two pins mounted on spring, and on the other hand a support member fixedly mounted on the wrist body. The ejectable piece attached to the end of the harness end is held captive in a release of the wrist body by means of said sleeve and support member against which it comes to precisely support

under the effect of tension of the end of harness. When, by pressure on the sleeve, the latter: tilts, disengages from its locking points and lowers, the space widens between the point of retention of the ejectable part on the sleeve and the fulcrum of the ejectable part on the support member. As soon as the opening is larger than the passage section of the ejectable part, the ejectable part emerges from the mechanism and thus causes the release of the end of harness.

 The end of the harness, whose ejectable piece attached to its end is held by the mechanism of attachment and release of a wrist, enters the device under the other wrist and passes through the device by means of the guide pulleys. It is fixed to the bar support by means of a cleat. In the case of mounting the device in three lines the end opening on the top of the bar support is mounted passing in a pulley external to the device, attached to the central line, and is attached to the bar support. By means of its pulleys, the device slides along the end of the harness.

The device according to the invention allows three different mounting of line according to the driving mode used according to the characteristics of the Wings used. So :
In the case of mounting in four lines: the device according to the invention is provided with the upper half bars. Each bar (upper and mobile) is fixed by means of the fixing holes a line. The two lines called the front line are attached to the upper bars. The two lines called brake lines are attached to the ends of the movable bars. The brake lines pass respectively between the pulley and the roller of the line guide fixed to the end of the upper bar of the same side. The device is non-slidably mounted.

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In the case of mounting in three lines: the device according to the invention no longer includes the upper bars that have become unnecessary. The brake lines are each respectively hooked to the end of the movable bars. The device is slidably mounted along the end of the harness.

 In the case of mounting in two lines: the device according to the invention does not comprise upper bars. Each of the two lines is hooked to the end of a moving bar. The device is non-slidably mounted.

contre le dispositif en libérant un longueur de bout correspondant à l' écartement entre la sortie du mécanisme d'accrochage et l'entrée sous la pou- lie de guidage du corps de poignet. La troisième ligne rallongée de la moitié de cette longueur modifie alors l'angle d'incidence de l'Aile. Celle-ci est ainsi neutralisée sans avoir eu à lâcher le dispositif. Thus when the ejectable part held by the sleeve of the latching mechanism and release is separated from said mechanism by pulling the harness end, following the tilting caused the sleeve, the harness tip slides under the harness hook of the user until free. Therefore, in the case of the three-line assembly, the ejectable piece abuts

against the device by releasing an end length corresponding to the spacing between the exit of the latching mechanism and the entrance under the guide body of the wrist body. The third line lengthened by half this length then changes the angle of incidence of the Wing. This is neutralized without having to let go of the device.

 When the user drives in four lines hooked to its end of harness, it can, thanks to the bars of the device, actuate the lines of brake separately as with a device of classic wrist, thus keeping all the finesse of the piloting by handle while having the advantages of a fixed bar: comfort for the user's wrists and stability and balance in the jumps. Safety is ensured by the release of the movable bars, thus generating the neutrality of the wing due to the release of the brakes, and by the possibility of operating at any moment the mechanism of release of the end of harness.

 When the user controls in three lines: the device being able to slide along the end of the harness by means of its guide pulleys, the user can shock and tilt his Wing safely thanks to the end of releasable harness. Between the fact that the position of the device on the harness end changes the angle of incidence of the wing and the possibility of playing on the brakes separately through the movable bars, the user hooked to his harness can perform jumps with a wing in full power always under control.

 Finally, whether in two, three or four lines, the device according to the invention makes it possible, thanks to the movable bars, a landing and a landing of the Wing as powerful as a mounting in four lines on separate handles.

 The attached drawings illustrate the invention: FIG. 1 represents the device seen from the front, in section, with all its parts

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cularités réunies selon l'invention.

cularities combined according to the invention.

- Figure 2 shows a front view of the device mounted in four lines with schematically dashed, the lateral pivoting amplitude of the movable bars.

 FIG. 3 represents a front view of the device mounted in three lines, with, schematically in dotted lines, the principle of movement on the end of the harness of the device in shocked-lined navigation. FIG. 4 represents a sectional view of the body bar support along the line AA of Figure 2.

 FIG. 5 represents a bottom view of the wrist body-side moving bar provided with the attachment and release mechanism of the end according to view A of FIG. 3.

 FIG. 6 represents a view from above of the wrist body-moving bar provided with the end guiding member according to view B of FIG. 3.

 FIG. 7 represents a bottom view of the wrist body-side moving bar provided with the end guiding member according to view C of FIG. 3.

 - Figure 8 shows a sectional view of the line guide along the line B-B of Figure 2.

 FIG. 9 represents a cross-sectional view of the attachment and end release mechanism along the line C-C of FIG. 3.

 - Figure 10 shows a sectional view of the wrist body side of the end guide member along the line D-D of Figure 3.

 - Figure 11 shows the block diagram of the mechanism of attachment and release of the ejectable part.

 - Figure 12 shows a sectional view of the attachment mechanism and release of the end in position: Locked sleeve: the ejection piece of the harness end is trapped in the mechanism.

 - Figure 13 shows a sectional view of the mechanism in position: tilting sleeve.

 - Figure 14 shows a sectional view of the mechanism in position: sleeve shifted and disengaged from the locking shoulder.

 - Figure 15 shows a sectional view of the mechanism in position: Sleeve lowered unlocked: ejectable part escapes from the mechanism: the end of the harness is released.

 - Figure 16 shows a sectional view of the mechanism in the hang-up position of the ejectable part in the mechanism.

 - Figure 17 shows a device two / three lines front view and in section.

The same drawing shows two variants of the device according to the invention: a variant type mobile bars without a bar support and a variant type fixed bars mounted on bent support.

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- La figure 18 représente la variante d'un dispositif deux/trois lignes vue de face en coupe : type barres fixes montées sur support de barre droit.

- Figure 18 shows the variant of a device two / three lines front view in section: type fixed bars mounted on straight bar support.

 - Figure 19 shows a sectional view of a body hooking device and drop tip according to the invention, mounted interposed on ume conventional bar type.

With reference to these drawings, the device comprises:
A bar support consisting of a body (1) extended by two arms (11) fixed apart forming an inverted U.

 The body (1) of the bar support has two connecting end pieces (2) on which are mounted fixed two half bars (called upper bars) (3) each having: holes (22) for fixing lines and, at their end of a line guide (21) consisting of a small body between the recess (25) which are rotatably mounted a pulley (23) and a roller (24) for guiding. Between the internal walls of the body (1) is mounted a guide pulley (14), a guide pin (15) and a cam cleat (16) end (7). The upper surface of the body (1) has an oblong hole (17) allowing the passage of the end of harness (7).

 At the end of the two arms (11) of the bar support, each having an internal longitudinal clearance (18) a lateral clearance (18 ') for the passage of the end of harness (7) and a lug (13) on its faces external, is mounted by means of a hinge pin (20) a wrist body (4) whose head (4 ') has above the axis (20) an indentation whose edges (39); abutting with the lug (13) of the arm (11), limit the lateral pivoting of the wrist (4). A small hole (19) off-center on the arm (11) and the head (4 ') of the wrist body (4) allows, by threading an axis, locking the wrist body (4) on the arm (11).

 On these wrist bodies (4) are mounted by means of connecting end (2 ') of the half bars (called movable bars) (12) each provided at their end with a hole (22') for fixing the line.

 The wrist bodies (4) of identical shape has one: a hooking mechanism and release of the end of harness (7), and the other: a guide member of the end of harness (7).

 The attachment and release mechanism is constituted according to the invention by a sleeve (5) threaded on the wrist body (4) from its longitudinal axis bear (P2) at the front: on a small shoulder (29) located on the top of the wrist body (4) and against the rear face (40) of the head (4 ') of the wrist body (4); and coming to rest at (P3) at the rear, by means of a notch (34), opposite the shoulder (29), against a pin (said

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 lower nipple) (32) mounted on a spring (30), opening and protruding from an orifice (33) below the underside of the wrist body (4). A second stud (said upper nipple) (31) mounted on a spring (30), opening and protruding from an orifice (33) on the top of the wrist body (4) in line with the lower nipple (32), holding pressing the sleeve (5) in the depressed position on the shoulder (29) (G-Fig. 12).

(27) au moyen d'un galet (28) monté sur l'axe d'articulation (20) du poignet (4) contre lequel elle s'appuie en (T), et au moyen du manchon (5) sur lequel elle exerce en (pol), engendré par la traction (F) du bout de harnais (7), une poussée (F2) sur la bordure interne du manchon (5) à l'aplomb de l' épaulement (29) du corps de poignet (4). Cette poussée (F2) transmise latéralement sur le manchon (5) tend à maintenir le manchon poussé et bloqué en (P3) contre le téton inférieur (32) (Fig. 12). Un disque de garde (26) est monté sur l' embout de raccordement (2') derrière le manchon (5) afin de protéger le manchon (5) contre tout basculement (K) par pression (J) involontaire (Fig. 13). The ejectable piece (6) attached to the end of the harness end (7) is held captive in a recess (27) opening under and behind the head (4 ') of the wrist body (4). She is selected in this dwelling

(27) by means of a roller (28) mounted on the hinge pin (20) of the wrist (4) against which it bears (T), and by means of the sleeve (5) on which it exerts (pol), generated by the pull (F) of the harness end (7), a thrust (F2) on the inner rim of the sleeve (5) in line with the shoulder (29) of the wrist body (4). This thrust (F2) transmitted laterally on the sleeve (5) tends to keep the sleeve pushed and locked at (P3) against the lower stud (32) (Fig. 12). A guard disk (26) is mounted on the connection piece (2 ') behind the sleeve (5) to protect the sleeve (5) against unintentional pressure swing (K) (Fig. 13). .

 The guide member of the harness end (7) consists of a simple pulley (35) mounted off-center with respect to the articulation axis (20) of the wrist (4), between the walls of the head (4). ') of the wrist body (4).

 The end of harness (7) is fixed on the device by means of the cleat catch (16) of the body (1) of the bar support, to adjust its length. It passes into the clearances (18,18 ') of the body (1) and arm (11) of the rod support by means of the axis (15) and guide pulley (14), and opens under the guide pulley ( 35) of the wrist body (4) between the pulley (35) and the clearance said housing (27) of the wrist body (4).

 When mounted in three lines (Fig. 3), the end of the harness (7) protrudes above the body (1) of the bar support by the oblong hole (17). It is mounted in a pulley (10), external to the device and attached to the end of the so-called central line line (9 ") .The device can thus slide by means of the pulleys (35) (14) and (10) along the end of the harness (7).

 When mounted in four lines (Fig. 2), the two lines called front lines (9 ') are each attached to an upper bar (3) by means of a hole (22). The two lines called brake lines (9) are each attached to a movable bar (12) by means of a hole (22 '). These lines (9) are each mounted in the clearance (25) between the pulley (23) and the roller (24) of the line guide (21) of the upper bar (3) of the same side.

 When mounting in two lines or four lines the device does not slide along the end of harness (7).

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When mounting in two or three rows the upper bars (3) are unnecessary and can be removed from the device (Fig. 3).

 The inverted U-shaped shape of the bar support and the spacing of the arms (11) allows the passage of the hook of the harness (8) of the user when he wants to precisely crochet the end of harness (7) stretched between the two arms (in).

 In the case of mounting in three lines, the length of the end corresponding to the spacing (E) of the arms (11) allows, when the end of harness (7) is released, to neutralize the power of the wing through the extension the center line (9 ") with a length of (E) / 2.

 Referring to the block diagram of operation (Fig. 11) and Figs 12,13, 14,15, 16: Pl is the fulcrum of the ejectable part (6) against the edge of the sleeve (5). P2 is the fulcrum of the sleeve (5) on the shoulder (29) of the wrist (4) and the rear face (40) of the head (4 ') of the wrist (4).

P3 is the point of support and locking of the sleeve (5) against the lower pin (32).

P4 is the stop point of the sleeve (5) against the wrist body (4) P5 is the point of pressure on the sleeve for tilting.

T is the fulcrum of the ejectable part (6) against the retaining roller (28).

F is the pulling force of the harness end (7) exerted on the ejectable part (6).

F2 is the thrust force exerted by the ejectable part (6) on the fulcrum Pl located on the sleeve (5).

D corresponds to the dimension of the so-called passage section of the ejectable part (6).

E corresponds to the distance between the arms (11).

X corresponds to the stroke to be made by P3 so that it is released from the lower stud (32).

Y corresponds to the stroke to be made by P4 so that P3 is released: Y> X Z corresponds to the stroke to be made by P2 so that it is released from the shoulder (29).

RI corresponds to the space between the point P1 of the sleeve (5) and the point T of the retaining roller (28) such that R1 = P1 T <D: the ejectable part (6) is retained blocked by the sleeve (5) (said locked) and the roller (28).

R2 corresponds to the space between the point Pol 'of the sleeve (5) in the next lowered position (M) and the point T of the holding roller (28) such that R2 = P1'T> D: La

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pièce éjectable (6) n'est plus retenue par le manchon (5) (dit déverrouillé) : la pièce éjectable (6) sort de son logement (27) sous la traction F du bout de harnais (7).

ejectable part (6) is no longer retained by the sleeve (5) (said unlocked): the ejectable part (6) out of its housing (27) under the traction F of the harness end (7).

R3 corresponds to the center radius P1 on which P4 moves when the sleeve (5) switches next (K) around the pivot point P1.

G corresponds to the pressure exerted by the point P2 on the shoulder (29) generated by the traction F of the tip (7).

J corresponds to the pressure exerted on the point P5 in order to tilt the sleeve (5).

K corresponds to the tilting of the sleeve (5) towards the rear.

L corresponds to the lateral displacement of the sleeve (5) and sliding above the stud (32).

M corresponds to the lowering of the sleeve (5).

N corresponds to the pressure to be exerted under the sleeve (5) for its re-locking.

U corresponds to the introduction of the ejectable part (6) into its housing (27) for the hang-up of the end of harness (7).

S corresponds to the lateral displacement towards the front of the sleeve (5) for its re-locking so as to have P2 on the shoulder (29).

Thus to carry out the release of the end of harness (7):
The user applies pressure (J) on the point (P5) of the sleeve (5). The sleeve (5) tilts next (K) around the pivot point (P1) until the abutment of its angle (P4) on the wrist body (4). (Figs 11 and 13). Y being larger than X, the angle (P3) of the sleeve (5) passes over the pin (32). Under the effect of the thrust F2 of the ejectable part (6) the sleeve (5) shifts next (L) backwards. Since Z is smaller than Y and the sleeve (5) has shifted laterally rearward, the angle (P2) of the sleeve (5) is disengaged from the shoulder (29) of the wrist body (29). ). (Fig.

ouverture Pl'T est plus grande que la section de passage (D) de la pièce éjectable (6). La pièce éjectable (6) sort de son logement (27) sous l'effet de traction (F) du bout de harnais (7) : le bout de harnais (7) est largué. (Fig. 11 et 15). 11 and 14). The sleeve (5) no longer retained lowers (M). So the

aperture Pl'T is larger than the passage section (D) of the ejectable part (6). The ejectable part (6) leaves its housing (27) under the pulling effect (F) of the harness end (7): the end of the harness (7) is released. (Figs 11 and 15).

To carry out the hang-up of the end of harness (7): the user
10 / introduced next (U) the ejectable part (6) in its housing (27) of the wrist body (4). (Fig. 16) 2 / exerts a pressure under the sleeve (5) according to (N) and, while maintaining the pressure, manually moves the sleeve (5) forwardly following

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(S) jusqu' à la mise en buté de l'angle (P2) du manchon (5) contre la face (40) arrière de la tête (4') du corps de poignet (4), et son appui sur l'épaulement (29). (Fig. 16) 3 /relâche la pression suivant (N) exercée sous le manchon (5). (Fig. 16) Le téton supérieur (31) prend le relais et par pression vers le haut sur le point (P5) maintien le manchon (5) verrouillé : la pièce éjectable (6) est à nouveau prisonnière du mécanisme selon l'invention. (fig. 12)
Le dispositif permet, selon l'invention, le blocage des barres mobiles (12) au moyen des trous (19) que comporte les têtes (4') des corps de poignet (4), et les bras (11) du support de barre, et au moyen d'un organe de blocage de type axe ou vis enfilé dans les dits trous (19). Utilisé ainsi, le dispositif selon l'invention se pilote comme une barre à deux ou trois lignes classique avec, grâce au largage du bout de harnais (7), la sécurité en plus.

(S) until the angle (P2) of the sleeve (5) is abutted against the rear face (40) of the head (4 ') of the wrist body (4), and its support on the shoulder (29). (Fig. 16) 3 / Release the next pressure (N) exerted under the sleeve (5). (Fig. 16) The upper nipple (31) takes over and by pressing up on the point (P5) holds the sleeve (5) locked: the ejectable part (6) is again trapped in the mechanism according to the invention . (Fig. 12)
The device allows, according to the invention, the locking of the movable bars (12) by means of the holes (19) that comprises the heads (4 ') of the wrist bodies (4), and the arms (11) of the bar support and by means of a locking member of the axis or screw type threaded into said holes (19). Used thus, the device according to the invention is piloted as a bar with two or three lines classic with, thanks to the release of the end of harness (7), the security in addition.

 Thus the device according to the invention, thanks to its movable or fixed mounted bars, allows in addition to all conventional assemblies and controls, new line fixtures (example: inverted lines) and new pilot versions: easier, more powerful and, thanks to the end of harness always releasable, in all cases more sure.

 According to the invention, the device can comprise numerous variants: variants at the level of the ...

 - The shape and overall size of the bar support (more or less bent, arm (11) more or less spaced, elongated).

 - the shape and overall size of the wrist body (4).

 - The shape and overall size of the sleeve (5).

 - type of connection piece (2) (male or female).

 - the length and section of the half bars (3) and (12).

 the number and location of the line fixing holes (22 and 22 ').

 the number and location of the guide pulleys (35) (14) and others in the device.

 - The shape of the ejectable part (6) and its passage section.

 - The shape and location in the mechanism of the roller-type retaining member (28) of the ejectable part (6).

 - The type of spring (30), pins (31) and (32).

 - The location of the pins (31) and (32) (more or less offset with respect to each other).

 - The type of locking member (16) of the harness end (7) on the bar support.

 According to the invention, the device can also comprise numerous

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 variants in the shape and mounting of the articulation of the movable bars (12) such as the variant illustrated in FIG. 17: the two arms (11) bent and identical are mounted integral and pivotable by means of the axis ( 20) of the central end guide pulley (14) (7). The stops (13) limit the pivoting of the arms (11). The ejectable part (6) is retained by the retaining pin (38), the guide pulley (35) is mounted in the clearance (27) of the arm (11) by means of a pulley support (36).

 For control in two or three lines, in the case where the user would choose the non-mobile bar control, the other particularities of the invention can be applied to the standard fixed bar type RIGHT models such as the variant illustrated by FIG. FIG. 18, or COUDEE, such as the variant illustrated in FIG. 17.

 Finally, the hooking mechanism and clean end release to the invention can be provided mounted ONLY on the conventional type of bar and other such as shown in Figure 19.

 The manufacture of the device according to the invention is provided in a non-limiting manner: - in plastic for the bar support (1-11), the wrist bodies (4), the sleeve (5), the ejectable part (6) , the line guide body (21), the guide pulleys and rollers (14) (35) (23) (24), the holding roller (28), the cleat (16).

 - sheathed aluminum for bars (3) and (12).

 - hard rubber for the guard disk (26).

 - brass for the passage of the line fixing holes (22-22 ').

 - in stainless steel for the pins (20) and (15), for the spring (30), for the pins (31) and (32), for all the axes of the pulleys and rollers of the device, for all the fastening screws .

 Thus, the device according to the invention is particularly intended for driving any type of wings and kites traction.

Claims (10)

CLAIM 1) A multi-line bar device with a width for steering Wings and kites traction characterized in that it comprises a bar support consisting of a body (1) on which is mounted two half bars fixed (3 ), line support, and two arms (11) at the end of each of which is pivotally mounted, by means of a wrist body (4) and an axis (20), a half bar (12) supporting a line in the line guide (21) of the fixed bar (3) above and on the same side. The end of harness (7), fixed to the body (1) by a wedge (16) is passing in an outer pulley (10) hooked to the central line (during assembly in three lines) and then guided by a pulley (14). ) of the body (1) and a pulley (35) of a wrist body (4), comes out of said wrist (4) and is hooked to the other wrist body (4) by means of an ejectable piece ( 6) fixed at its end: this assembly allowing the bar support to slide along the end of harness (7) on which is hooked by means of its harness (8) the user. The ejectable part (6) is, under the traction effect of the end (7), held captive in a clearance (27) of the wrist body (4) by pressing against a retaining member (28) of the wrist (4) and pressing against a sleeve (5) blocked by means of a shoulder (29) and two studs (31) and (32) spring-mounted (30) that includes the wrist body (4). A guard member (26) protects the sleeve (5) 2) Device according to claim 1 characterized in that the body (1) of bar support comprises connecting end pieces (2) side, an internal clearance (18) opening on the top of the body (1) by a hole (17). ) allowing the passage of the tip (7), a cam end cleat and, mounted between its inner walls, a pulley (14) and a shaft (15) end guide.  3) Device according to claim 1 or claim 2 characterized in that the arms (11) of the body (1) of the bar support are spaced apart from another F thus determining the length of the end (7) stretched between said arm (11). These arms (11) have an end passage clearance (18) and a wrist pivot limiting spigot (13) mounted at their end by means of a hinge pin (20).  4) Device according to any one of the preceding claims <Desc / Clms Page number 12>  pivoting of the wrist (4) around the hinge axis (20).

 characterized in that each wrist body (4) has a connecting piece (2 '), a shoulder (29) for locking, an abutment stop surface (40), pinhole holes (33) ( 31 and 32) opening on the top and bottom of the wrist body (4) and a large internal clearance (27) opening under the underside of the body and between the head of the body (4 ') having a notch limiting by its edges (39) 5) Device according to any one of the preceding claims, characterized in that the sleeve (5) comprises a point P1 of the ejectable piece (6), a bearing point P2 on the shoulder (29) and the surface stop (40), a point P3 of support and blocking against one of the lock pins of the mechanism.  6) Device according to any one of the preceding claims characterized in that one of the wrist body (4) comprises a pulley (35) end guide.  7) Device according to any one of the preceding claims characterized in that one of the wrist body (4) is provided with locking studs (31 and 32) mounted on spring, and comprises a retaining member (28) of the ejectable part (6).  8) Device according to any one of the preceding claims characterized in that the dimension between the support point T of the ejectable part (6) against the retaining member (28) and the support point Pi of the piece ejectable (6) against the sleeve (5) is smaller than the passage section dimension of the ejectable part (6) when the sleeve (5) is locked. This dimension between T and Pl is greater than the passage section dimension of the ejectable part (6) when the sleeve (5) is unlocked.  9) Device according to any one of the preceding claims characterized in that the line guide (21) of the half fixed bars (3) comprises, mounted between its walls, a pulley (23) and a roller (24) for guiding between which passes the line of control.  10) Device according to any one of the preceding claims characterized in that the wrist bodies (4) according to a variant for control in two and three lines, are mounted integral and pivotable by means of an axis (20) on which rotates the pulley (14).