Classifications

• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B3/00—Parallel bars or similar apparatus

Definitions

• the object of the invention relates to a set of devices for asymmetrical bars for sports use with cable fixing, allowing their rapid installation by a single person, a better evolution of the gymnasts and an instant adjustment of spacing of the handrails with automatic cable tension adjustment.
• the adjustment of the spacing of the hand rails results in an imbalance in the cable tensions which should be strictly identical in all the adjustment positions.
• the devices according to the invention eliminate these drawbacks. Indeed, the hand rails are engaged at their ends in one. sort of metal cage attached to the upper part of the vertical support posts with which they are joined together with a bolt-on bolt, for example, serving as a horizontal axis for the hand rails, which allows the assembly, support uprights - hand rails, to be easily put in place by a single person because there is no risk of it tipping over (the lower ends of the uprights being secured to a support base). A single person can therefore very easily hang the groups of preset cables, tensioned by a fastening system of the tensioner type with instant tightening lever (ski boot tightening) and dynamometer adjustable according to the desired cable tension.
• the hand rails are in round tube, either in very thin special steel, or in fiberglass, duralumin, or any other material of a minimum weight favoring soft but very dynamic contacts and limiting the risks of rupture during rebounds or violent shocks.
• Known hand supports of this type are ovoid, made of reinforced wood, thus offering a very large force of inertia, harmful both in terms of trauma and that of gymnastic technique.
• the round shape of the bars presented here makes it possible to execute certain rotation exercises with greater safety, thanks to more rational hand grips.
• the hand-holder spacing adjustment system is produced by using an eccentric toothed pinion fixed at the end of the hand-holders at the upper end of the uprights (small or large uprights or even both).
• This pinion whose eccentric axis, mounted on ball bearings, receives a mechanical chain connected to the tension cables.
• This notched pinion locks or unlocks instantly using a process described below.
• the eccentric pinion keeps an identical cable tension for all adjustments, since it manages to compensate for decreases in the level of the bars when the uprights are very inclined. It is possible to avoid eccentricating the pinion thanks to a shoe system replacing the lower axis of the upright and fixed to it, or to a free or guided carriage on a curved track allowing the tension of the cables to be maintained during of. spacings.
• Variants to this system consist in fixing, between the lower a'e and the pivot of the hand-holder, the most tall for example, two toothed pulleys, integral, having a different number of teeth and actuated by a crank.
• Another process can be carried out by a number of windings in dead turns on a conical pulley, calculated as a function of the strict regulation of cable tension during variations in the spacing of the uprights.
• the lower axis of the uprights which support the adjustment system can also be fixed on a sort of carriage allowing these uprights to be moved perpendicular to the ground during the spacings.
• FIG. 1 represents the overall diagram in perspective of the asymmetric bars .
• the uprights 1 and 2 support the round or possibly ovoid hand rails and are connected at their upper ends by cables fixed either permanently directly to the uprights, or to the spacing adjustment system.
• the cables will be definitively fixed in 5 and 6, and conversely if the system is placed in 5 and 6, the cables 7 and 8 are stretched in 9 and 10 by the intermediate a pension distribution pulley on which they slide, itself being fixed to a chain, the number of links of which allows possible backlash during installation of the apparatus, the spacings of the fixing brackets n ' being not always identical.
• the ends 11 and 12 of the cables are fixed to a quick tensioner of the hook tensioner type for closing ski boots, itself attached to a chain whose number of links allows a more precise preset. This system effectively removes screw tensioners of impractical use.
• An adjustable dynamometer fixed at 11 or 12 allows you to measure the cable tension desired by each gymnast.
• Figs. 2 and 3 show a simple adjustment system which overcomes all the faults.
• the toothed wheel is eccentric in order to catch up with the tension of the cables during the displacement of the uprights concerned and is instantly locked by the finger 17 manipulated by the handle 18 constantly in the locked position thanks to the spring 19.
• the part 20 may possibly constitute additional security which is toggled before handling the handle 18 and when the latter is released, the security is placed automatically. To make an adjustment in distance, it is enough to push the handle 18 on the upright 21 and place the latter in the desired position. By releasing the handle 18, everything is instantly locked.
• the wheel 22 can be graduated and provided with a small crank which allows the adjustment to be adjusted very precisely. This same device can be produced without offsetting the toothed pulley, the cable tension being taken up by other methods.
• Figure 4 shows that the upright 21 for example, provided with quick-locking system without eccentric, has at its lower end a kind of shoe which during variations of the upper part of the upright, in one direction or the other, sees its lower fulcrum move in height thus automatically catching up on tensions cables, thanks to a displacement in height of the upper end of the upright during its inclination, or by a lowering in the other direction.
• FIG. 5 shows a process allowing the upright 21 to move perpendicular to the ground without variation in height since the inclinations are eliminated thanks to a carriage guided laterally inside the bases.
• FIG. 6 shows another method, the upright 21, provided with the notched pivot, without eccentric, mounted on a carriage moving over a range whose curve is suitable for maintaining the constant tension of the cables during the various spacings.
• FIG. 7 is a simplified diagram of the quick locking system moved to the middle of the upright (large or small) which thus offers a variant allowing the removal of the eccentric and the shoe for example, while maintaining the same tension of the cables.
• the crank 23 is integral with a double pinion, one of which has a different number of teeth, lower, calculated as a function of the cable tension take-up, or of the desired tension regularization.
• Each cable arrival first sliding on a free pulley 24 and 25 is extended by a mechanical chain 26 and 27 being housed respectively on their specific toothed pinions 28 and 29 and themselves extended by a spring 30 and 31 fixed on the opposite cable.
• crank 23 when the crank 23 is actuated on one side or the other, there is always an elongation or a shortening of the set of cables corresponding to the catching up of the tension, functions of the desired spacings of the hand rails. So that the upright can move perpendicular to the ground, it is possible to adapt to this device a transmission 32 to a pinion 33 moving on the rack 34. It is obvious that the variations impressed by the crank 23 and the displacement of the pinion 33 will correspond to the desired displacement.
• Figure 8 shows how this previous device can be modified by simplifying it: the two cable inlets 24 and 25 are connected by the same chain passing over a single pinion, the transmission to a toothed wheel 35 moving on a notched surface 36, with a curvature corresponding to the catching up of the cable tensions, also allows the vertical amounts concerned to be held.
• FIG. 9 shows a side view of a variant of the device shown diagrammatically in FIG. 7.
• This system completely removes the mechanical chain.
• the cable is wound on a conical pulley calculated according to the catching up of the tension of the cables, a number of dead turns will be according to the desired spacings, but so that the cable is integral with the cone a fixing on it is necessary to the joint X.
• the center point of the upright spacing corresponds to the same number of turns on either side of the fixing point X.
• the rotation of the crank 37 therefore generates a gain or a loss of cable length, depending on the direction in which it rotates, thus allowing catching of the cable tension.

Landscapes

• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Physical Education & Sports Medicine (AREA)
• Rehabilitation Tools (AREA)
• Mechanical Control Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9193629

Family Applications (1)

Country Status (3)

Families Citing this family (2)

Family Cites Families (3)

• 1977
  • 1977-07-12 FR FR7722456A patent/FR2397204A1/fr active Granted
• 1978
  • 1978-06-22 WO PCT/FR1978/000004 patent/WO1979000041A1/fr unknown
• 1979
  • 1979-02-14 EP EP19780900047 patent/EP0018965A1/fr not_active Withdrawn

Non-Patent Citations (1)

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