EP0353174A1 - Takedown archery bow showing a particular vibratory behaviour - Google Patents

Takedown archery bow showing a particular vibratory behaviour Download PDF

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Publication number
EP0353174A1
EP0353174A1 EP89440081A EP89440081A EP0353174A1 EP 0353174 A1 EP0353174 A1 EP 0353174A1 EP 89440081 A EP89440081 A EP 89440081A EP 89440081 A EP89440081 A EP 89440081A EP 0353174 A1 EP0353174 A1 EP 0353174A1
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EP
European Patent Office
Prior art keywords
arc
arch
bow
screw
sleeves
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Granted
Application number
EP89440081A
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German (de)
French (fr)
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EP0353174B1 (en
Inventor
Jacques Martin
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Individual
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Individual
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Priority to AT89440081T priority Critical patent/ATE101434T1/en
Publication of EP0353174A1 publication Critical patent/EP0353174A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B5/00—Bows; Crossbows
    • F41B5/14—Details of bows; Accessories for arc shooting
    • F41B5/1403—Details of bows
    • F41B5/143—Arrow rests or guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B5/00—Bows; Crossbows
    • F41B5/0005—Single stave recurve bows
    • F41B5/0026—Take-down or foldable bows

Definitions

  • the present invention relates to a removable competition arch with improved vibratory behavior.
  • the branches constitute the flexible parts of the bow which store the potential energy during the tensioning of the rope.
  • they In the removable arches, they have at one of their ends a fixing heel allowing them to be mounted on the body of the arch.
  • these branches At the other end, these branches include a headstock and a groove intended for the placement of the rope.
  • the arch body which constitutes its central part, has three main elements, namely: . the window in which the aiming and arrow support accessories are fixed, in particular the spacer system making it possible to move the arrow more or less from the bow body; . the handle for gripping and holding the bow; . the housings of the branches which allow their fixing, this fixing taking place most often by means of a screwing system.
  • stabilizers made of a barrel of variable length on which a counterweight of variable weight can slide, shaft which is screwed onto the body of the arch via a linkage damper. These stabilizers have the function of balancing the arc and partially absorbing vibrations.
  • the vibratory behavior of the arc proves to be complex and a source of drawbacks which can become major. Indeed, the vibrations generated by the release propagate in the various elements of the arc and are transmitted in a harmful way to the wrist of the user. They affect the accuracy of the shot and offset the arc at the end of the shot in a sometimes uncontrollable way.
  • the stabilizers commonly used cannot constitute a satisfactory solution because of their low efficiency in neutralizing vibrations.
  • the present invention aims to remedy all these drawbacks by proposing a removable competition arch with improved vibratory behavior compared to that of known arcs and which also comprises a spacer system allowing better adjustment of the boom.
  • the present invention thus relates to a removable competition arc characterized in that it comprises, in combination, on the one hand an arc body obtained by molding and comprising a main part whose general axis is rectilinear, extended by each side by a connection plate reinforced by ribs ending in ends of approximately parallelepiped shape inclined by relative to the main part and having no perforation, and on the other hand two semi-rigid sleeves each force-fitted on one of the two ends of the arch body and having the shape of a hollowed parallelepiped, the arch comprising in addition to two flexible recessed branches, the ends of which assume a parallelepiped shape adapted to that of the ends of the body, so as to be able to fit into the housing delimited by the sleeves and the ends of said body, an arc further comprising an immobilization device from each built-in end of the flexible arms and, mounted in a bore in the window of the bow body, a spacer system allowing the position of the arrow to be adjusted, both horizontally and vertically.
  • the body of the arc according to the invention can be obtained by molding a metal alloy of the type used in aeronautics.
  • transverse fixing means for example screwing
  • the semi-rigid receiving sleeves are made of carbon fibers and, more precisely, of a material obtained by weaving carbon threads. They have a thickness of a few millimeters and a length adapted to that of the parallelepipedic ends of the body of the arch.
  • the ends of the arch body are forced into the sleeves, which can be fixed thereon by gluing.
  • the corresponding flexible branch is then inserted into the sleeve where it can be placed isostatically by means of six suitably arranged points of a wear-resistant material, such as that known under the name of teflon.
  • the static and dynamic balancing of the arc body thanks to the massive ends, makes it possible to transform the low frequency vibrations of the natural modes of its elements into high frequency vibrations, which are strongly damped by the semi-rigid material in which are made the sleeves.
  • the arch body according to the invention exhibits a vibratory behavior very clearly superior to that of existing arch bodies, making in particular unnecessary the presence of frontal stabilizers, positioned at the two ends of the arch body. bow. This also results in a significant gain both in terms of the weight of the arc as its cost price.
  • the damping of the vibrations of the arch body can be further improved by the installation, on its handle, of an orthopedic over-grip made of a material of the expanded foam type.
  • Such an over-grip can be formed by cold injection of a foam of a synthetic resin in a deformable envelope fixed by bonding to the handle of the bow.
  • the damping can be further improved by a holding-wedging device providing a pressure contact against the large flank of the insert end of each flexible branch.
  • the body of the arch comprises a main part 1 whose axis of general longitudinal direction is rectilinear, extended by two ends 2 and 3 of parallelepiped shape inclined relative to the general direction of the part main 1 and each having a shoulder 4 and 5 on each of which can be supported heel of one of the ends 6 and 7 of a flexible arc branch 8 and 9 removable from the main part 1.
  • a mounting sleeve 10 or 11 also of parallelepiped shape, is fitted onto each of the two ends 2 or 3 of the arch body. It is forced into it, leaving a free space in the interior volume of each sleeve, forming a housing, of shape and dimensions corresponding to those of each end 6 or 7 of the corresponding flexible branch 8 or 9.
  • the ends 2 and 3 of the body of the arch are connected to the central part by a curvature of the material 12 and 13 doubled on the rear face by two reinforcing ribs 14, 15 and 16, 17 making it possible to improve the rigidity and the stability of the arc.
  • a handle 18 surmounted by a window 19 in which a cylindrical bore 20 is provided for a spacer system 21.
  • Another hole 22 disposed immediately below the handle 18 is used for the establishment of a central stabilizer, not shown.
  • the spacer system 21 is shown, consisting of a hollow screw 23 mounted in the bore 20 formed in the arc body.
  • This screw 23 is made integral with the arc body by means of a part of a nut 24 mounted at one end of the screw 23 and bearing against one of the cheeks 25 of the arc body in a cylindrical counterbore 26 machined to one end of the bore 20 and on the other hand a lock nut 27 associated with an adjustment head 28 mounted on the other end of the screw 23 and bearing against the other face of the arc body.
  • the adjustment head 28 consists of a nut 29 mounted on the screw 23 and bearing against the lock nut 27 and of a cylindrical piece 30, secured to the nut 29 by means of a screw 31 and coming fit into a recess 32 formed in the screw 23 and terminated by a bottom 33 and a bore 34.
  • This cylindrical part 30 is used to compress a spring 35 housed in the recess 32 between the cylindrical part 30 and a press button 36 having a shoulder coming to rest against the bottom 33 of the screw 23.
  • the screwing of the nut 29 in the screw 23 causes the displacement of the part 30, which compresses the spring 35 and conversely, the unscrewing of the nut 29 causes the spring 35 to loosen.
  • the press button 36 is formed from two cylinders of different diameters. The narrowest cylinder passes through the bore 34 and its attached head 37 serves as a support for the arrow.
  • a wedging-holding device In order to further improve the vibratory behavior of the arc and to compensate for the wear of the embedded ends of the flexible branches in the end sleeves, there is provided according to the present invention, a wedging-holding device.
  • This device is conventionally mounted on one and the other of the transverse edges 41 of one and the other end 2 or 3 of the body of the arc each covered with a receiving sleeve 10 or 11 of a end 6 or 7 to be maintained with a flexible arc branch 8 or 9.
  • the axis 40 is carried by a receiving part, socket or the like, 41 secured to the body of the arc, or comes to rest in a tapped hole. Any other assembly is possible.
  • the cam pivots either around the axis 40, or with this axis.
  • the part 39 acting as a cam has a curvilinear profile 42 slightly curved over a part of its contour 43, so as to bear through an area 44 of larger surface, on one of the large flanks 45 opposite the embedded end of each flexible branch 8 or 9.
  • This cam 39 is made of semi-hard synthetic material, for example nylon, polyamide or polyester, so as to take advantage of the slight elastic crushing of the material against the harder face of the flexible branch of the arch.
  • the cam pivotally mounted relative to the body of the arch is maneuvered using a wrench or any other tool coming to be caught in its head in order to pivot either the cam or its axis 40 which can be made integral with the cam.
  • the body of the cam preferably has a projection 46 situated opposite its zone of contact with the corresponding flexible branch in order to be able to maneuver it manually more easily.
  • the immobilizer according to the invention This allows, thanks to the pressure contact, to obtain a mechanical clamping for the mechanical holding of the branches and the additional damping of the vibrations originating from the shot.
  • the foregoing description has no limiting character with respect to the present invention.
  • the arc body described can undergo a certain number of modifications without departing from the scope of the invention. Its ends can in particular affect a shape other than a parallelepiped, for example in the trunk of a pyramid, and the fixing sleeves have the corresponding suitable shape.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Surgical Instruments (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Stringed Musical Instruments (AREA)
  • Rehabilitation Tools (AREA)
  • Prostheses (AREA)
  • Dry Shavers And Clippers (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Shovels (AREA)
  • Rear-View Mirror Devices That Are Mounted On The Exterior Of The Vehicle (AREA)
  • Harvester Elements (AREA)

Abstract

Take-down archery bow showing an improved vibratory behaviour. <??>This bow comprising in combination: A. a bow body obtained by moulding and having a main part (1), the general axis of which is rectilinear, terminating on each side in a plate reinforced by ribs, each extended by a end (2, 3) of approximately parallelepipedic form, inclined relative to the main part; B. two semi-rigid interlocking sleeves (10, 11) force-fitted onto the two ends of the bow body and having the form of a widened parallelepiped; C. two flexible branches (8, 9), the ends of which have a parallelepidedic form matched to that of the ends of the body, so that they can likewise be interlocked in the fastening sleeves; D. a device (38) for immobilising one end of each flexible branch; E. mounted in a perforation made in the aperture of the bow body, a spacer system (21) of a new type allowing the position of the arrow to be adjusted both horizontally and vertically. <IMAGE>

Description

La présente invention a pour objet un arc de compétition démontable à comportement vibratoire amélioré.The present invention relates to a removable competition arch with improved vibratory behavior.

Le tir à l'arc a connu, ces dernières années, un développement important et le matériel performant conçu pour répondre aux attentes exigées s'est notablement amélioré.Archery has experienced significant development in recent years, and the high-performance equipment designed to meet the expectations has improved considerably.

Ainsi, depuis une dizaine d'années, tous les arcs ont la même conformation et les mêmes caractéris­tiques générales liées aux conditions fonctionnelles propres du tir à l'arc de compétition. Pour des raisons d'ordre pratique, ils sont le plus souvent démontables, formés d'un corps d'arc et de deux branches flexibles d'extrémité fixées de façon amovible sur le corps de l'arc, destinées à tendre la corde.Thus, for the past ten years, all bows have had the same conformation and the same general characteristics linked to the specific functional conditions of competitive archery. For practical reasons, they are most often removable, formed by a bow body and two flexible end branches fixed removably on the body of the bow, intended to tension the rope.

Les branches constituent les parties flexibles de l'arc qui emmagasinent l'énergie potentielle lors de la mise en tension de la corde. Dans les arcs démontables, elles présentent à l'une de leurs extrémités un talon de fixation permettant de les monter sur le corps de l'arc. A l'autre extrémité, ces branches comportent une poupée et une gorge destinées à la mise en place de la corde.The branches constitute the flexible parts of the bow which store the potential energy during the tensioning of the rope. In the removable arches, they have at one of their ends a fixing heel allowing them to be mounted on the body of the arch. At the other end, these branches include a headstock and a groove intended for the placement of the rope.

Le corps d'arc, qui en constitue la partie centrale, comporte trois éléments principaux, à savoir :
. la fenêtre où viennent se fixer les accessoires de visée et de support de flèche, en particulier le système écarteur permettant d'écarter plus ou moins la flèche du corps d'arc ;
. la poignée permettant la saisie et la tenue de l'arc ;
. les logements des branches qui permettent leur fixation, cette fixation s'opérant le plus souvent au moyen d'un système de vissage.The arch body, which constitutes its central part, has three main elements, namely:
. the window in which the aiming and arrow support accessories are fixed, in particular the spacer system making it possible to move the arrow more or less from the bow body;
. the handle for gripping and holding the bow;
. the housings of the branches which allow their fixing, this fixing taking place most often by means of a screwing system.

A ces éléments principaux s'ajoutent de nom­breux éléments additionnels, parmi lesquels des stabili­sateurs constitués d'un fût de longueur variable sur lequel peut coulisser une masselotte de poids variable, fût qui est vissé sur le corps de l'arc par l'inter­médiaire d'un amortisseur de liaison. Ces stabilisateurs ont pour fonction d'équilibrer l'arc et d'absorber en partie les vibrations.In addition to these main elements, there are many additional elements, including stabilizers made of a barrel of variable length on which a counterweight of variable weight can slide, shaft which is screwed onto the body of the arch via a linkage damper. These stabilizers have the function of balancing the arc and partially absorbing vibrations.

Le comportement vibratoire de l'arc s'avère complexe et source d'inconvénients pouvant devenir majeurs. En effet, les vibrations générées par la décoche se propagent dans les différents éléments de l'arc et se transmettent de façon dommageable au poignet de l'utilisateur. Elles affectent la précision du tir et déporte l'arc en fin de tir de façon quelquefois incontrôlable.The vibratory behavior of the arc proves to be complex and a source of drawbacks which can become major. Indeed, the vibrations generated by the release propagate in the various elements of the arc and are transmitted in a harmful way to the wrist of the user. They affect the accuracy of the shot and offset the arc at the end of the shot in a sometimes uncontrollable way.

Les stabilisateurs couramment utilisés ne peuvent constituer une solution satisfaisante en raison de leur faible efficacité dans la neutralisation des vibrations.The stabilizers commonly used cannot constitute a satisfactory solution because of their low efficiency in neutralizing vibrations.

Une autre difficulté réside dans la nature et les possibilités réduites du système écarteur destiné à ajuster la position de la flèche avant le tir. En effet, les systèmes écarteurs connus ne permettent généralement qu'un seul réglage en position de la flèche, qui peut être uniquement plus ou moins écartée du corps d'arc, mais dont la position ne peut être modifiée en hauteur.Another difficulty lies in the nature and the reduced possibilities of the spreader system intended to adjust the position of the arrow before firing. Indeed, known spacer systems generally allow only one adjustment in the position of the arrow, which can only be more or less spaced from the arch body, but whose position cannot be changed in height.

La présente invention vise à remédier à tous ces inconvénients en proposant un arc de compétition démontable à comportement vibratoire amélioré par rapport à celui des arcs connus et qui comporte en outre un système écarteur permettant un meilleur ajustement de la flèche.The present invention aims to remedy all these drawbacks by proposing a removable competition arch with improved vibratory behavior compared to that of known arcs and which also comprises a spacer system allowing better adjustment of the boom.

La présente invention a ainsi pour objet un arc de compétition démontable caractérisé en ce qu'il comporte, en combinaison, d'une part un corps d'arc obtenu par moulage et comportant une partie principale dont l'axe général est rectiligne, prolongée de chaque côté par une platine à raccordement renforcé par des nervures se terminant par des extrémités de forme approximativement parallélépipédique inclinées par rapport à la partie principale et ne comportant aucune perforation, et d'autre part deux manchons semi-rigides montés à force chacun sur une des deux extrémités du corps d'arc et présentant la forme d'un parallélépipède évidé, l'arc comprenant en outre deux branches flexibles encastrables dont les extrémités affectent une forme pa­rallélépipédique adaptée à celle des extrémités du corps, de manière à pouvoir venir s'encastrer dans le logement délimité par les manchons et les extrémités dudit corps, arc comportant en outre un dispositif d'immobilisation de chaque extrémité encastrée des branches flexibles et, monté dans un perçage ménagé dans la fenêtre du corps de l'arc, un système écarteur permettant le réglage de la position de la flèche, tant horizontalement que verticalement.The present invention thus relates to a removable competition arc characterized in that it comprises, in combination, on the one hand an arc body obtained by molding and comprising a main part whose general axis is rectilinear, extended by each side by a connection plate reinforced by ribs ending in ends of approximately parallelepiped shape inclined by relative to the main part and having no perforation, and on the other hand two semi-rigid sleeves each force-fitted on one of the two ends of the arch body and having the shape of a hollowed parallelepiped, the arch comprising in addition to two flexible recessed branches, the ends of which assume a parallelepiped shape adapted to that of the ends of the body, so as to be able to fit into the housing delimited by the sleeves and the ends of said body, an arc further comprising an immobilization device from each built-in end of the flexible arms and, mounted in a bore in the window of the bow body, a spacer system allowing the position of the arrow to be adjusted, both horizontally and vertically.

Le corps de l'arc selon l'invention peut être obtenu par moulage d'un alliage métallique du type de ceux utilisés en aéronautique.The body of the arc according to the invention can be obtained by molding a metal alloy of the type used in aeronautics.

Ses extrémités parallélépipédiques raccordées au corps d'arc par des nervures de renforcement offrent l'avantage de présenter un raccordement mécanique à faible torsion avec une masse importante qui favorise la solidité et la stabilité dynamique et statique de l'arc en même temps que l'amortissement des vibrations, rendant inutile la présence des stabilisateurs frontaux positionnés aux deux extrémités du corps d'arc.Its parallelepiped ends connected to the arch body by reinforcing ribs offer the advantage of having a mechanical connection with low torsion with a large mass which promotes the solidity and the dynamic and static stability of the arch at the same time as the vibration damping, eliminating the need for front stabilizers positioned at both ends of the arch body.

Le maintien de chaque branche par encastrement dans un manchon ne faisant pas appel à une technique utilisant des moyens transversaux de fixation, par exemple de vissage, favorise également l'amortissement des vibrations, de même que l'absence de stabilisateurs frontaux, les perforations nécessitées par les systèmes de fixation à vis des branches et par les stabilisateurs frontaux constituant des puits de vibrations et entraînant des concentrations de contraintes qui affaiblissent la résistance mécanique de l'arc tout en étant génératrices de vibrations de basse fréquence.Maintaining each branch by embedding in a sleeve not using a technique using transverse fixing means, for example screwing, also promotes vibration damping, as well as the absence of front stabilizers, the perforations required by the screw fixing systems of the branches and by the front stabilizers constituting wells of vibrations and causing concentrations of stresses which weaken the mechanical resistance of the arc while generating low frequency vibrations.

Conformément à l'invention, les manchons récepteurs semi-rigides sont réalisés en fibres de carbone et, plus précisément, en un matériau obtenu par tissage de fils de carbone. Ils présentent une épaisseur de quelques millimètres et une longueur adaptée à celle des extrémités parallélépipédiques du corps de l'arc.According to the invention, the semi-rigid receiving sleeves are made of carbon fibers and, more precisely, of a material obtained by weaving carbon threads. They have a thickness of a few millimeters and a length adapted to that of the parallelepipedic ends of the body of the arch.

La mise en oeuvre de fibres de carbone autorise la réalisation de manchons qui présentent des qualités de légèreté en même temps qu'une résistance mécanique exceptionnelle, tout en contribuant également à l'amor­tissement des vibrations.The use of carbon fibers allows the production of sleeves which have qualities of lightness at the same time as an exceptional mechanical resistance, while also contributing to the damping of vibrations.

Les extrémités du corps d'arc, ainsi qu'il a déjà été dit, sont introduites à force dans les manchons, qui peuvent être fixés sur celle-ci par collage. La branche flexible correspondante est ensuite insérée dans le manchon où elle peut être placée isostatiquement grâce à six points convenablement disposés d'un matériau résistant à l'usure, comme celui connu sous le nom de téflon.The ends of the arch body, as already mentioned, are forced into the sleeves, which can be fixed thereon by gluing. The corresponding flexible branch is then inserted into the sleeve where it can be placed isostatically by means of six suitably arranged points of a wear-resistant material, such as that known under the name of teflon.

La nature du matériau dans lequel est réalisé le manchon, à savoir les fibres de carbone, lui confère des propriétés fortement amortissantes vis-à-vis des vibrations à haute fréquence.The nature of the material from which the sleeve is made, namely carbon fibers, gives it highly damping properties with respect to high frequency vibrations.

Or, l'équilibrage statique et dynamique du corps d'arc, grace aux extrémités massives, permet de transformer les vibrations de basse fréquence des modes propres de ses éléments en vibrations de haute fréquence, lesquelles sont fortement amorties par le matériau semi-rigide dans lequel sont réalisés les manchons.However, the static and dynamic balancing of the arc body, thanks to the massive ends, makes it possible to transform the low frequency vibrations of the natural modes of its elements into high frequency vibrations, which are strongly damped by the semi-rigid material in which are made the sleeves.

Du fait de sa conception originale, le corps d'arc selon l'invention présente un comportement vibratoire très nettement supérieur à celui des corps d'arc existants, rendant en particulier inutile la présence des stabilisateurs frontaux, positionnés aux deux extrémités du corps d'arc. Il en résulte en outre un gain appréciable tant en ce qui concerne le poids de l'arc que son prix de revient.Due to its original design, the arch body according to the invention exhibits a vibratory behavior very clearly superior to that of existing arch bodies, making in particular unnecessary the presence of frontal stabilizers, positioned at the two ends of the arch body. bow. This also results in a significant gain both in terms of the weight of the arc as its cost price.

L'amortissement des vibrations du corps d'arc peut être encore amélioré par la mise en place, sur sa poignée, d'une surpoignée orthopédique réalisée en un matériau du type mousse expansée.The damping of the vibrations of the arch body can be further improved by the installation, on its handle, of an orthopedic over-grip made of a material of the expanded foam type.

Une telle surpoignée peut être formée par injection, à froid, d'une mousse d'une résine synthé­tique dans une enveloppe déformable fixée par collage sur la poignée de l'arc.Such an over-grip can be formed by cold injection of a foam of a synthetic resin in a deformable envelope fixed by bonding to the handle of the bow.

L'amortissement peut encore être amélioré par un dispositif de maintien-calage apportant un contact de pression contre le grand flanc de l'extrémité encas­trable de chaque branche flexible.The damping can be further improved by a holding-wedging device providing a pressure contact against the large flank of the insert end of each flexible branch.

L'invention sera mieux comprise à la lecture de la description détaillée qui suit d'un corps d'arc conforme à l'invention représenté sur le dessin annexé, étant bien entendu que cette description ne présente aucun caractère limitatif vis-à-vis de l'invention.The invention will be better understood on reading the detailed description which follows of an arc body according to the invention shown in the appended drawing, it being understood that this description does not have any limiting character with respect to the invention.

Sur le dessin annexé,

  • . la figure 1 est une vue en perspective de trois quarts du corps d'un arc selon l'invention ;
  • . la figure 2 est une vue en coupe longitudinale du système écarteur qui vient se loger dans le perçage représenté sur la figure 1 ;
  • . la figure 3 est une vue schématique en perspective montrant un exemple de dispositif d'immobilisation et son implantation à l'extrémité du corps de l'arc ;
  • . la figure 4 est une vue en coupe longitudinale de l'extrémité du corps de l'arc au niveau de l'encas­trement des branches.
In the attached drawing,
  • . Figure 1 is a perspective view of three quarters of the body of an arc according to the invention;
  • . Figure 2 is a longitudinal sectional view of the spacer system which is housed in the bore shown in Figure 1;
  • . Figure 3 is a schematic perspective view showing an example of an immobilizer and its location at the end of the body of the arc;
  • . Figure 4 is a longitudinal sectional view of the end of the body of the arch at the level of the embedding of the branches.

Sur la figure 1, on voit que le corps de l'arc comprend une partie principale 1 dont l'axe de direction générale longitudinale est rectiligne, prolongée par deux extrémités 2 et 3 de forme parallélépipédique inclinées par rapport à la direction générale de la partie principale 1 et présentant chacune un épaulement 4 et 5 sur chacun desquels peut venir prendre appui le talon d'une des extrémités 6 et 7 d'une branche flexible d'arc 8 et 9 déboîtable de la partie principale 1.In FIG. 1, it can be seen that the body of the arch comprises a main part 1 whose axis of general longitudinal direction is rectilinear, extended by two ends 2 and 3 of parallelepiped shape inclined relative to the general direction of the part main 1 and each having a shoulder 4 and 5 on each of which can be supported heel of one of the ends 6 and 7 of a flexible arc branch 8 and 9 removable from the main part 1.

Un manchon d'encastrement 10 ou 11 de forme également parallélépipédique vient s'emmancher sur cha­cune des deux extrémités 2 ou 3 du corps d'arc. Il y est introduit à force, laissant dans le volume intérieur de chaque manchon un espace libre, formant logement, de forme et de dimensions correspondant à celles de chaque extrémité 6 ou 7 de la branche flexible correspondante 8 ou 9.A mounting sleeve 10 or 11, also of parallelepiped shape, is fitted onto each of the two ends 2 or 3 of the arch body. It is forced into it, leaving a free space in the interior volume of each sleeve, forming a housing, of shape and dimensions corresponding to those of each end 6 or 7 of the corresponding flexible branch 8 or 9.

Les extrémités 2 et 3 du corps de l'arc sont raccordées à la partie centrale par une incurvation de la matière 12 et 13 doublée sur la face arrière par deux nervures de renforcement 14, 15 et 16, 17 permettant d'améliorer la rigidité et la stabilité de l'arc.The ends 2 and 3 of the body of the arch are connected to the central part by a curvature of the material 12 and 13 doubled on the rear face by two reinforcing ribs 14, 15 and 16, 17 making it possible to improve the rigidity and the stability of the arc.

Dans la partie principale 1 du corps d'arc est conformée une poignée 18 surmontée d'une fenêtre 19 dans laquelle se trouve ménagé un perçage cylindrique 20 pour un système écarteur 21.In the main part 1 of the arch body, there is formed a handle 18 surmounted by a window 19 in which a cylindrical bore 20 is provided for a spacer system 21.

Un autre perçage 22 disposé immédiatement en dessous de la poignée 18 sert à la mise en place d'un stabilisateur central, non représenté.Another hole 22 disposed immediately below the handle 18 is used for the establishment of a central stabilizer, not shown.

Sur la figure 2, est représenté le système écarteur 21 constitué d'une vis creuse 23 montée dans le perçage 20 formé dans le corps d'arc. Cette vis 23 est rendue solidaire du corps d'arc au moyen d'une part d'un écrou 24 monté à une extrémité de la vis 23 et prenant appui contre une des joues 25 du corps d'arc dans un lamage cylindrique 26 usiné à une extrémité du perçage 20 et d'autre part d'un contre-écrou 27 associé à une tête de réglage 28 montée sur l'autre extrémité de la vis 23 et prenant appui contre l'autre face du corps d'arc.In Figure 2, the spacer system 21 is shown, consisting of a hollow screw 23 mounted in the bore 20 formed in the arc body. This screw 23 is made integral with the arc body by means of a part of a nut 24 mounted at one end of the screw 23 and bearing against one of the cheeks 25 of the arc body in a cylindrical counterbore 26 machined to one end of the bore 20 and on the other hand a lock nut 27 associated with an adjustment head 28 mounted on the other end of the screw 23 and bearing against the other face of the arc body.

La tête de réglage 28 est constituée d'un écrou 29 monté sur la vis 23 et prenant appui contre le contre-écrou 27 et d'une pièce cylindrique 30, solida­risée à l'écrou 29 au moyen d'une vis 31 et venant s'emboiter dans un évidement 32 formé dans la vis 23 et terminé par un fond 33 et un perçage 34. Cette pièce cylindrique 30 sert à comprimer un ressort 35 logé dans l'évidement 32 entre la pièce cylindrique 30 et un bouton-pression 36 présentant un épaulement venant s'appuyer contre le fond 33 de la vis 23.The adjustment head 28 consists of a nut 29 mounted on the screw 23 and bearing against the lock nut 27 and of a cylindrical piece 30, secured to the nut 29 by means of a screw 31 and coming fit into a recess 32 formed in the screw 23 and terminated by a bottom 33 and a bore 34. This cylindrical part 30 is used to compress a spring 35 housed in the recess 32 between the cylindrical part 30 and a press button 36 having a shoulder coming to rest against the bottom 33 of the screw 23.

Le vissage de l'écrou 29 dans la vis 23 provoque le déplacement de la pièce 30, qui vient comprimer le ressort 35 et inversement, le dévissage de l'écrou 29 provoque le relâchement du ressort 35. Le bouton-pression 36 est formé de deux cylindres de diamètres différents. Le cylindre le plus étroit traverse le perçage 34 et sa tête rapportée 37 sert d'appui à la flèche.The screwing of the nut 29 in the screw 23 causes the displacement of the part 30, which compresses the spring 35 and conversely, the unscrewing of the nut 29 causes the spring 35 to loosen. The press button 36 is formed from two cylinders of different diameters. The narrowest cylinder passes through the bore 34 and its attached head 37 serves as a support for the arrow.

En dévissant l'écrou 24, le contre-écrou 27 et la tête de réglage 28, il est possible de déplacer l'ensemble dans le perçage 20 afin de modifier la position du bouton-pression 36 tant verticalement que latéralement, ainsi que son écartement de la joue du corps d'arc. Une fois le réglage fait, le revissage de l'ensemble fixe le bouton-pression 36 à la position choisie.By unscrewing the nut 24, the lock nut 27 and the adjustment head 28, it is possible to move the assembly in the bore 20 in order to modify the position of the press button 36 both vertically and laterally, as well as its spacing of the cheek of the arch body. Once the adjustment has been made, screwing the assembly together fixes the press button 36 at the chosen position.

En vue d'améliorer encore le comportement vibratoire de l'arc et de rattraper l'usure des extrémités encastrées des branches flexibles dans les manchons d'extrémité, on prévoit selon la présente invention, un dispositif de calage-maintien.In order to further improve the vibratory behavior of the arc and to compensate for the wear of the embedded ends of the flexible branches in the end sleeves, there is provided according to the present invention, a wedging-holding device.

Il s'agit par exemple d'un dispositif 38 d'immobilisation par maintien-calage, à l'aide d'une came 39, montée solidaire d'un axe 40 mobile en rotation sur une amplitude de déviation angulaire suffisante permettant d'obtenir un bon serrage par pression.It is for example a device 38 for immobilization by holding-wedging, using a cam 39, mounted integral with an axis 40 movable in rotation over a sufficient angular deflection amplitude making it possible to obtain good pressure tightening.

Ce dispositif est monté de façon classique sur l'un et l'autre des chants transversaux 41 de l'une et l'autre extrémité 2 ou 3 du corps de l'arc recouverte chacune d'un manchon récepteur 10 ou 11 d'une extrémité 6 ou 7 à maintenir d'une branche flexible d'arc 8 ou 9.This device is conventionally mounted on one and the other of the transverse edges 41 of one and the other end 2 or 3 of the body of the arc each covered with a receiving sleeve 10 or 11 of a end 6 or 7 to be maintained with a flexible arc branch 8 or 9.

L'axe 40 est porté par une pièce réceptrice, douille ou autre, 41 solidaire du corps de l'arc, ou vient s'immobiliser dans un perçage taraudé. Tout autre montage s'avère possible.The axis 40 is carried by a receiving part, socket or the like, 41 secured to the body of the arc, or comes to rest in a tapped hole. Any other assembly is possible.

Ainsi, la came pivote soit autour de l'axe 40, soit avec cet axe.Thus, the cam pivots either around the axis 40, or with this axis.

Elle est manoeuvrée manuellement afin de pouvoir se dégager facilement par pivotement à chaque insertion ou dégagement des branches flexibles.It is maneuvered manually so that it can be easily disengaged by pivoting on each insertion or disengagement of the flexible branches.

La pièce 39 faisant office de came présente un profil curviligne 42 faiblement incurvé sur une partie de son contour 43, de manière à porter par une zone 44 de plus grande surface, sur un des grands flancs 45 en regard de l'extrémité encastrée de chaque branche flexible 8 ou 9.The part 39 acting as a cam has a curvilinear profile 42 slightly curved over a part of its contour 43, so as to bear through an area 44 of larger surface, on one of the large flanks 45 opposite the embedded end of each flexible branch 8 or 9.

Cette came 39 est réalisée en matière semi-dure synthétique, par exemple en nylon, en polyamide ou en polyester, de manière à profiter du léger écrasement élastique de la matière contre la face plus dure de la branche flexible de l'arc.This cam 39 is made of semi-hard synthetic material, for example nylon, polyamide or polyester, so as to take advantage of the slight elastic crushing of the material against the harder face of the flexible branch of the arch.

On réalise ainsi un rattrapage d'usure et la pression d'immobilisation suffisante pour que l'extrémi­té de la branche fasse bien corps avec le manchon, et neutralise ainsi les vibrations parasites pouvant subsister.This takes up wear compensation and sufficient immobilization pressure so that the end of the branch forms a solid body with the sleeve, and thus neutralizes the parasitic vibrations that may remain.

Selon une autre réalisation, la came montée pivotante par rapport au corps de l'arc est manoeuvrée à l'aide d'une clé ou tout autre outil venant se prendre dans sa tete en vue de faire pivoter soit la came soit son axe 40 qui peut être rendu solidaire de la came.According to another embodiment, the cam pivotally mounted relative to the body of the arch is maneuvered using a wrench or any other tool coming to be caught in its head in order to pivot either the cam or its axis 40 which can be made integral with the cam.

Le corps de la came présente de préférence une saillie 46 située à l'opposé de sa zone de contact avec la branche flexible correspondante afin de pouvoir la manoeuvrer manuellement plus facilement.The body of the cam preferably has a projection 46 situated opposite its zone of contact with the corresponding flexible branch in order to be able to maneuver it manually more easily.

Elle pourra également comporter un rappel élastique en position de pincement.It may also include an elastic return in the pinch position.

Le dispositif d'immobilisation selon l'inven­ tion permet, grâce au contact de pression, d'obtenir un serrage mécanique pour le maintien mécanique des branches et l'amortissement supplémentaire des vibra­tions provenant du tir.The immobilizer according to the invention This allows, thanks to the pressure contact, to obtain a mechanical clamping for the mechanical holding of the branches and the additional damping of the vibrations originating from the shot.

Il assure, en outre, le rattrapage du jeu dû à l'usure mécanique de l'extrémité de la branche successivement encastrée puis sortie à chaque séquence de tir.It also ensures that the play is taken up due to mechanical wear at the end of the branch, which is successively fitted in and out at each firing sequence.

Comme il a déjà été dit, la description qui précède ne présente aucun caractère limitatif vis-à-vis de la présente invention. Ainsi, le corps d'arc décrit peut subir un certain nombre de modifications sans pour autant sortir du cadre de l'invention. Ses extrémités peuvent en particulier affecter une forme autre que parallélépipédique, par exemple en tronc de pyramide, et les manchons de fixation présenter la forme adaptée correspondante.As has already been said, the foregoing description has no limiting character with respect to the present invention. Thus, the arc body described can undergo a certain number of modifications without departing from the scope of the invention. Its ends can in particular affect a shape other than a parallelepiped, for example in the trunk of a pyramid, and the fixing sleeves have the corresponding suitable shape.

Claims (10)

1. Arc de compétition démontable caractérisé en ce qu'il comporte, en combinaison, d'une part un corps d'arc obtenu par moulage et comportant une partie prin­cipale dont l'axe neutre est rectiligne, prolongée de chaque côté par une platine renforcée par des nervures se terminant par des extrémités de forme approximati­vement parallélépipédique, inclinées par rapport à la partie principale et ne comportant aucune perforation, et d'autre part deux manchons semi-rigides d'encastrement montés à force sur les deux extrémités du corps d'arc et présentant la forme d'un parallélépipède évidé, l'arc comprenant en outre deux branches flexibles encastrables dont les extrémités affectent une forme pa­rallélépipédique adaptée à celle des extrémités du corps, de manière à pouvoir venir s'encastrer dans le logement délimité par les manchons et les extrémités dudit corps, et en outre, un dispositif d'immobilisation de chaque extrémité encastrable des branches flexibles et, monté dans un perçage ménagé dans la fenêtre du corps de l'arc, un système écarteur permettant le réglage de la position de la flèche, tant horizon­talement que verticalement.1. Removable competition arch characterized in that it comprises, in combination, on the one hand an arc body obtained by molding and comprising a main part whose neutral axis is rectilinear, extended on each side by a reinforced plate by ribs ending in ends of approximately parallelepiped shape, inclined relative to the main part and having no perforation, and on the other hand two semi-rigid embedding sleeves forcibly mounted on the two ends of the body arch and having the shape of a hollowed parallelepiped, the arch further comprising two flexible recessed branches, the ends of which assume a parallelepiped shape adapted to that of the ends of the body, so as to be able to fit into the housing delimited by sleeves and the ends of said body, and in addition, a device for immobilizing each insertable end of the branches are flexible and, mounted in a bore in the window of the body of the bow, a spacer system allowing the adjustment of the position of the arrow, both horizontally and vertically. 2. Arc selon la revendication 1 caractérisé en ce que les manchons d'encastrement sont réalisés en fibres de carbone.2. Arc according to claim 1 characterized in that the mounting sleeves are made of carbon fibers. 3. Arc selon la revendication 2 caractérisé en ce que les manchons d'encastrement sont réalisés en un matériau obtenu par tissage de fils de carbone.3. Arc according to claim 2 characterized in that the mounting sleeves are made of a material obtained by weaving carbon son. 4. Arc selon l'une quelconque des revendica­tions précédentes, caractérisé en ce que sa poignée est recouverte d'une surpoignée orthopédique réalisée en une mousse expansée.4. Bow according to any one of the preceding claims, characterized in that its handle is covered with an orthopedic over-grip made of expanded foam. 5. Arc selon la revendication 4, caractérisé en ce que ladite surpoignée orthopédique est réalisée par injection, à froid, d'une mousse d'une résine synthé­ tique dans une enveloppe déformable fixée par collage sur la poignée de l'arc.5. Arch according to claim 4, characterized in that said orthopedic over-grip is produced by cold injection of a foam of a synthetic resin tick in a deformable envelope fixed by gluing on the handle of the bow. 6. Arc selon l'une quelconque des revendica­tions précédentes, caractérisé en ce que son système écarteur est constitué d'une vis creuse montée dans le perçage formé dans la fenêtre et rendue solidaire du corps au moyen d'une part d'un écrou monté à une extrémité de la vis et prenant appui contre la joue du corps d'arc dans un lamage cylindrique usiné à une extrémité du perçage et, d'autre part, d'un contre-écrou associé à une tête de réglage montée sur l'autre extrémité de la vis et prenant appui contre l'autre face du corps, la tête de réglage étant constituée d'un écrou monté sur la vis et prenant appui contre le contre-écrou au moyen d'une vis et venant s'emboîter dans un évidement formé dans la vis et terminé par un fond et un perçage, cette pièce cylindrique servant à comprimer un ressort également placé dans l'évidement entre la pièce cylindrique et un bouton-pression muni d'un épaulement venant s'appuyer contre le fond de la vis.6. Arc according to any one of the preceding claims, characterized in that its spacer system consists of a hollow screw mounted in the hole formed in the window and made integral with the body by means of a part of a nut mounted at one end of the screw and bearing against the cheek of the arc body in a cylindrical counterbore machined at one end of the bore and, on the other hand, of a lock nut associated with an adjustment head mounted on the other end of the screw and bearing against the other face of the body, the adjustment head consisting of a nut mounted on the screw and bearing against the lock nut by means of a screw and coming to fit in a recess formed in the screw and terminated by a bottom and a bore, this cylindrical piece serving to compress a spring also placed in the recess between the cylindrical piece and a press button provided with a shoulder coming to bear against the bottom of the screw. 7. Arc selon l'une quelconque des revendica­tions précédentes, caractérisé en ce que son corps est obtenu par moulage d'un alliage métallique de type aéronautique.7. Arc according to any one of the preceding claims, characterized in that its body is obtained by molding a metallic alloy of aeronautical type. 8. Arc selon les revendications précédentes, caractérisé en ce que le dispositif d'immobilisation de l'extrémité encastrable de chaque branche se fixe sur le chant latéral de chaque extrémité du corps d'arc mettant en oeuvre une pièce de pincement mobile entre une position rabattue de repos et une position de travail dans laquelle elle exerce un contact de pression contre le flanc adjacent de l'extrémité encastrable de la branche correspondante.8. Bow according to the preceding claims, characterized in that the device for immobilizing the built-in end of each branch is fixed on the lateral edge of each end of the arch body implementing a movable pinching piece between a position folded down at rest and a working position in which it exerts a pressure contact against the adjacent flank of the insertable end of the corresponding branch. 9. Arc selon la revendication 8 caractérisé en ce que la pièce de pincement est une came mobile en rotation autour d'un axe perpendiculaire au chant latéral adjacent du corps d'arc.9. Arc according to claim 8 characterized in that the gripping part is a cam movable in rotation about an axis perpendicular to the adjacent lateral edge of the arc body. 10. Arc selon la revendication 9 caractérisé en ce que la came présente sur au moins une partie de son profil un contour faiblement incurvé.10. Arc according to claim 9 characterized in that the cam has on at least part of its profile a slightly curved contour.
EP89440081A 1988-07-25 1989-07-25 Takedown archery bow showing a particular vibratory behaviour Expired - Lifetime EP0353174B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89440081T ATE101434T1 (en) 1988-07-25 1989-07-25 DISASSEMBLING SPORTS BOW WITH VIBRATING BEHAVIOR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8810170A FR2634547B1 (en) 1988-07-25 1988-07-25 REMOVABLE COMPETITION ARC
FR8810170 1988-07-25

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EP0353174A1 true EP0353174A1 (en) 1990-01-31
EP0353174B1 EP0353174B1 (en) 1994-02-09

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US (1) US5025774A (en)
EP (1) EP0353174B1 (en)
AT (1) ATE101434T1 (en)
DE (1) DE68912986T2 (en)
ES (1) ES2050837T3 (en)
FR (1) FR2634547B1 (en)

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DE4432500A1 (en) * 1994-09-13 1996-03-14 Siegfried Dipl Ing Rudolph Weatherproof throwing arm bearing for sports bows
US5546923A (en) * 1994-10-27 1996-08-20 Duncan; Douglas J. Take-down archery bow
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US6276351B1 (en) 2000-04-28 2001-08-21 Michael J. Treadway Take-down archery bow
US6635059B2 (en) * 2001-01-03 2003-10-21 Bernard L. Randall Cannulated locking screw system especially for transiliac implant
US8393982B2 (en) * 2009-09-16 2013-03-12 Michael D. Ferguson Miniature locator device for use with hunting arrows
US8453635B1 (en) 2009-10-30 2013-06-04 Mcp Ip, Llc Bow limb retaining system
US9341430B2 (en) 2012-09-10 2016-05-17 Mcp Ip. Llc Self-aligning crossbow interface
USD783108S1 (en) 2015-10-16 2017-04-04 Mcp Ip, Llc Archery limb cup
US10184750B2 (en) 2015-11-16 2019-01-22 Mcp Ip, Llc Limb cup with axle
US10969210B2 (en) 2018-04-25 2021-04-06 Pro-Tracker Ip Holding, Llc System and method for adjusting the trajectory of an arrow
US11686563B2 (en) 2019-02-20 2023-06-27 Pro-Tracker Ip Holding, Llc System and method for adjusting the trajectory of an arrow
CN113340151B (en) * 2021-07-19 2023-07-21 丘伟豪 Bow handle and bow of removable counter weight

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Also Published As

Publication number Publication date
ES2050837T3 (en) 1994-06-01
US5025774A (en) 1991-06-25
DE68912986D1 (en) 1994-03-24
DE68912986T2 (en) 1994-08-25
EP0353174B1 (en) 1994-02-09
FR2634547A1 (en) 1990-01-26
FR2634547B1 (en) 1993-09-24
ATE101434T1 (en) 1994-02-15

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