FR2655552A1 - SPORTS GYMNASTIC BEAM WITH DYNAMIC ADJUSTMENT. - Google Patents

Abstract

A dynamically adjustable gymnastics beam characterized in that its legs slide on rollers (4) which can be dynamically adjusted by using a key (13) guided by a set of sliding sections (14 and 15) which counterbalance the coils of a spring (10). Said legs support the shock-absorbing body of the beam which incorporates strips of flexible material in order to diminish shocks and thereby improve sporting results and reduce traumatisms to the body.

Description

The gymnastic beam is an apparatus intended for female gymnastics on which the gymnasts perform choreographic and acrobatic exercises.

Currently the standards of the International Federation for the beam body are: 5000 mm in length, 160 mm in height and 100 mm in width. Both sides are slightly rounded. The top is lightly padded on 10 mm and covered with a fabric.

The beam is fixed on 2 rigid feet, generally metallic, 1200 mm from the ground.

The object of the invention aims, without changing the initial dimensional characteristics, to make this apparatus dynamic and to improve sports performance as well as to considerably reduce shock, and therefore bodily trauma.

Subsequently these new features should replace those currently in progress.

The invention is characterized in that the beam body rests on dynamic sliding feet or with variable triangulation. The body of the beam is designed so that its upper part is more flexible, suppressing vibrations and providing additional comfort.

Figure 1 shows an entire beam, with a sliding foot on the left side and a variant of the variable angle foot on the right.

Figure 2 shows the detail of the sliding foot with variable elasticity.

For a good understanding of the invention, we will expose a simple example: in the case of a spring of 10 turns having a total useful stroke of 10 cm for a load of 1000 kg (all the turns then touch) it will be necessary also 1000 kg to crush a single turn, so for one cm of stroke. The object of the invention is to use these data, namely, for the same load, to vary the useful travel in translation of the slide of the foot of the apparatus, which has the effect of varying the dynamism, without however changing in all possible cases of adjustment, the height from the top of the beam to the ground is 1200 mm.

The foot is composed as follows
A hollow square metal profile (1) which is fixed to the beam body (2) (only a piece is shown on the plan).

A hollow square section (3) of smaller dimension than the section (1) sliding inside the section (1) by means of rollers (4). These rollers are positioned by a plastic cage or other material (not shown on the plan). So it will take 4 cages for the slide to be functional and these said cages cannot be deposited thanks to the stops (5) of the profile (3) and to the stops (6) of the profile (1).
The plate (7) makes it possible, thanks to the pressure screws (8), to make up for the play and the dimensional tolerance of the profiles. So it goes without saying that there will be two plates (7) side by side and perpendicular.

The part (9) is fixed to the body (2) and to the profile (1).

The spring (10) is fixed to the part (9) and to the fixed stop (11) itself fixed to the profile (3).

The profile (3) is provided with through holes (12) through and through, following the pitch of the spring and respecting the winding angle of the latter.

The key (13) (shown in the drawing in the extended position) allows rapid adjustment of the variation of the dynamism of the foot. The key (13) inserted in the last hole from the top and passing through the profile and the spring right through, blocks the slide and completely cancels the effect of dynamism.

Which corresponds to the standards of the International Federation in force on the date of filing.

On the other hand, the key (13) pressed into the last hole at the bottom gives a maximum of useful travel for maximum dynamism.

The key (13) shown in dotted lines gives an intermediate position. The various holes allow adaptation according to the weight and exercises of the gymnast during work on the apparatus.

The key (13) can be free, simply connected by a chain to the profile (3) or as in Figure 2, guided in the correct position of the angle of the holes and held by the square profile (14) sliding in a square profile (15). The key (13) will be machined in part from a flat (16) which will abut on a lug (17) of the profile guide (14) which will prevent it from coming out completely.

FIG. 3 represents a version of the dynamic foot eliminating the slide and keeping all the other characteristics of the spring system with variable elasticity produced in the sliding container (18). Advantage of this version: elimination of the slide by a simple calibrated axis (A). Disadvantage: during a variation of the angle, the foot will move slightly on the ground.

FIG. 4 schematically represents another variant of the system. The spring is partly, or entirely neutralized by a screw (20) with the pitch and the diameter of this spring (19) which can be screwed inside either by a crank, or by an electric motor, via of the nut (21).

Figure 5 shows the beam body for shock absorption and vibration.

The part (23) represents the body proper, which can be made of various materials but very resistant such as aluminum, composite materials, wood, etc. The parts (24) represent polyethylene foam or rubber bands or other shock absorbing material while restoring energy.

Part 25 represents a rigid profile such as wood, fiberglass or other, which has the effect of distributing the loads. The part (26) represents a foam or rubber of the same composition but more compact than the parts (24). The entire beam body is covered with a non-slip synthetic coating, not shown in the drawing.

This beam body can be mounted on rigid feet, just like the dynamic feet that we have just described, can be used with traditional beam bodies, as well as with jumping horse, sheep, bock, jumping table.

Claims (9)

1) Sports gymnastic beam with variable dynamism, characterized in that the feet are sliding using rollers (4) or are of variable triangulation, adjustable in dynamism using a key (13) guided by a game sliding profiles (14) and (15) neutralizing the turns of a spring (10) or adjustable using screws (20) having the same effect. These feet support the shock-absorbing beam body, inside which strips of flexible material are incorporated in order to lessen the shocks, thereby improving sports performance and reducing bodily trauma. 2) Device according to claim 1 characterized in that the foot is provided in its upper part with a slide operating by means of rollers (4) and characterized by the 2 plates (7) side by side and perpendicular to the inside the slide, these make it possible to make up for the play and the tolerances of the profiles (1) and (3). 3) Device according to claim 1 characterized by a spring which can, for the same load, vary the useful stroke using a key (13) passing right through the profile (3) and the spring ( 10) through the holes (12) without, however, changing the heights of the beam. 4) Device according to claim 1 characterized in that the holes (12) of the profile (3) follow the pitch of the spring and respect the winding angle thereof. 5) Device according to claim 1 characterized in that the key (13) is guided in the correct angulation of the turns of the spring by the square profile (14) sliding in a square profile (15). 6) Device according to claim 1 forming the subject of a variant of the foot, characterized in that the slide of the foot is removed, the latter becoming rigid, and replaced by a calibrated axis (A). The spring is located in the sliding bottle and allows operation in variable triangulation, the dynamic adjustment remaining identical. 7) Device according to claim 1 forming the subject of a variant of the foot, allowing the same effects, characterized by a screw with the pitch and the diameter of the spring and penetrating in part or in whole inside the turns of the latter using a crank or a motor, depending on the setting and the desired useful stroke. 8) Device according to claims (1) and (3) characterized in that the key (13) has a flat (16) and abuts on a lug (17) of the part (14) which prevents it from coming out and to get lost. 9) Device according to claim 1 characterized by a beam body made more damping using two strips of foam or rubber and a plate of rigid material (wood, plastic, fiberglass-polyester, onc.). ) distributing the loads, all covered with a non-slip synthetic coating.