SK992012U1 - Structure of mobile goal with enhanced security - Google Patents

Abstract

The mobile sports gate structure comprises two vertical bars (3), a horizontal bar (1) connecting the upper ends of said vertical bars (3), a pair of lower side horizontal bars (4), each connected to the lower end of one of said vertical bars ( 3), a horizontal rear lower bar (2), one end of which is attached to the end of one side lower horizontal bar (4) and the other end is attached to the end of the second side lower horizontal bar (4), the weight and length of all of its parts being Designed to ensure that the center of gravity of the gate in its working position is at least 40% of the depth from the plane determined by the vertical bars (3) and at a distance of less than 50% of the height of the gate from the plane determined by the lower side bars (4) and at a distance of from 40% to 60% of the width of the goal from the plane determined by the vertical bar (3) and the adjacent lower side bar (4).

Description

Technical field

The object of the present invention is the construction of a mobile sports goal with increased safety, which will reduce the risk of injuries when playing sports games, especially football.

BACKGROUND OF THE INVENTION

Some sports games, especially football, are currently used in mobile gates made e.g. of steel or duralumin. The disadvantage of these gates is that heavy weights or other anchoring systems must be used to stabilize them according to the relevant standards, but this is inconvenient when moving frequently and is very often forgotten. The consequence is that they often cause serious injuries, often resulting in death, especially in children who hang on the goalpost, swing on it and otherwise impair its stability. It is therefore necessary to develop a mobile sports goal structure with increased safety.

International Application No. WO 2008/152175 discloses a sports goal with reduced risk of injury to athletes and standard reflecting properties. Its two lateral rods and beam comprise a solid core of metal, wood or the like, surrounded by a spongy porous sheath based on EPDM (ethylene-propylene-diene monomer), which in turn is covered with an outer layer of polyethylene equipped with a polyurethane coating.

International Application No. WO 2007/096435 discloses a sports goal that prevents injuries that may be caused by the goal construction. This gate comprises rods and beams which are made of a flexible material, such as rubber, which can be filled with sand, gravel, liquids, iron filings or the like.

E. _E

International Application No. WO 2009/129257 discloses an anchor device and method for anchoring a mobile gate.

Document FR 2 610 205 relates to a mobile device used in a sports environment, made of tubular aluminum sections, which includes, inter alia, a wheel system, a ground mounting system in two places, and is equipped with a carabiner system for fastening the net.

The essence of the technical solution

The object of the present invention is to provide a mobile sports gate construction with increased safety without the need for additional anchoring or weight systems. A gate with increased security in the sense of the technical solution is a gate which, if possible, does not tip over or only with difficulty and, if it is tipped over, hits with the lowest possible energy.

According to the present invention, this task is solved by the construction of a mobile sports goal, which includes:

• two vertical bars • horizontal beam joining the upper ends of the above vertical bars • a pair of side lower horizontal bars each connected to the lower end of one of said vertical bars • a horizontal rear lower bar whose one end is connected to the end of one side lower The horizontal bar and the other end shall be attached to the end of the second lateral lower horizontal bar, which consists in that the weight and length of all its parts are designed to ensure that the center of gravity of the goal in its working position is at least 40% of depth. from the plane defined by the vertical bars and at a distance of less than 50% of the height of the gate from the plane determined by the lower side bars and from 40% to 60% of the width of the gate from the plane determined by the vertical bar and adjacent lower side bar.

···· · · ··

Further advantageous embodiments are set out in the dependent claims. The aforementioned center of gravity arrangement is preferably achieved by increasing the weight of the rear lower rod, which, like other rods, may be hollow, but unlike them, at least partially filled with a filler material, preferably concrete, to increase its weight, preferably in such a way wherein the center of gravity of the bar is in the working position approximately in the middle of the length of the bar.

The goal structure of the present invention is as defined above using the open definition and may therefore include other components or bars, e.g. to suspend and / or tension the net and / or to facilitate the movement of the gate. Thus, in one preferred embodiment, the gate of the invention further comprises means for suspending and / or tensioning the net, such as bars, hooks, carabiners, eyelets, ropes and the like, wherein the net may be permanently attached to the gate according to the invention, e.g. . by means of adhesives or by heat utilization processes such as melting and welding. In a further embodiment, the gate of the enviromental solution may comprise means for facilitating the movement of the gate, such as wheels or grips.

All terms of use in defining the fit and direction of the individual components of the gate construction according to the technical solution, such as e.g. vertical, horizontal, parallel, also include corresponding deviations from these states, e.g. technical possibilities of production. All the features described for the individual parts (e.g. bars) of the gate construction according to the invention collectively apply independently to each of these parts individually, e.g. the horizontal beam and vertical bars may be circular on the cross-section, and the rear lower bar and the side lower bar may be square on the cross-section in the same embodiment.

The term bar is preferably a straight bar, but the technical solution includes any other possible bars, e.g. which may be required by circumstances, e.g. the rules of the sport. The horizontal beam and the vertical bars are usually, and preferably, straight, but the rear bottom bar and the side bottom bar may be in the form of various curved bars, e.g. can form an arc. The bars and beams may have any cross-section, e.g. circular, square, rectangular, oval, preferably are square or square in cross-section

circular, most preferably circular. The bars and beams (and corners) may be hollow, partially filled or fully filled, both with the material from which they are made and with other material. The vertical bars and the horizontal beam have standard balls-reflecting properties.

Similarly, the term corner is not only meant to be a sharp, rectangular corner, but the technical solution includes other possible corner shapes, e.g. in the form of an arc, which may be required by circumstances, e.g. the rules of the sport.

The ratio of the weight of said rear lower bar and rear lower corners to the weight of said horizontal crossbar and upper corners is greater than or equal to 2.5: 1. Preferably the ratio is 3: 1 to 7: 1, more preferably 3: 1 to 5: 1, most preferably 3.5: 1 to 4: 1. All of the above ranges within the scope of the present invention are to be understood as if all values within these ranges have been expressly listed individually. For example, a range of 3: 1 to 5: 1 explicitly includes e.g. ratios 3.1: 1, 3.2: 1, 3.01: 1, 3.11: 1, etc. For prior art gates, the ratio is 2: 1 (for steel gate) and 1: 2 to 2: 1 (for dural gate). The above weight ratios are achieved in that the horizontal rear lower bar is heavier than the horizontal beam and / or the rear lower corners are heavier than the upper corners. The weight of bars, beams and corners can be influenced eg. using materials of different density, using the same material at different wall thicknesses, using a filler, or adding (screwing, welding) loads to the rear lower corners and / or the rear lower rod.

The stability of the gate construction according to the invention will also have some influence on vertical bars, side lower bars and front lower corners, but their impact is lower and compared to the ratio described above, in the usual ratio of length of vertical bar and side lower bar ranges from approximately 4 : 1 to 1: 1 negligible.

The total weight of the mobile gate construction according to the present invention preferably does not exceed 100 kg, so as not to be too heavy to carry.

Although the goal structure of the present invention may generally be made of any suitable material, such as wood, metals and metal alloys (e.g., steel, aluminum, duralumin), it is preferably made of plastic, which may be e.g. polyamide (PA), teflon (PTFE), polyester (PES), polypropylene (PP), polyvinyl chloride (PVC), polyphenylsulfide (PPS), acrylonitrile butadiene-styrene (ABS) and the like, preferably fiber reinforced (ie, composite), e.g. e-glass, s-glass, carbon fibers, aramid fibers, basalt fibers, dynema fibers or natural fibers, such reinforced plastics may contain from 20 to 99 wt. %, and from 80 to 1 wt. reinforcement. In another preferred embodiment, it is made of a composite material containing a resin, e.g. epoxy resin, polyester resin, vinyl ester resin, acrylate resin (including, e.g., methyl methacrylate resin) and the like. which is reinforced with fibers, e.g. glass fibers (e-glass, sglass), carbon fibers, aramid fibers, basalt fibers, dynema fibers or natural fibers.

In a preferred embodiment, the beam of the gate construction according to the present invention is made of a composite comprising:

- 75 wt. epoxy resin matrices

- 25 wt. % of reinforcement containing up to 40 wt. % of carbon fiber, up to 60 wt. glass fiber

In a preferred embodiment, the vertical bars of the goal structure according to the present invention are made of a composite comprising:

- 75 wt. epoxy resin matrices

- 25 wt. % of reinforcement containing up to 20 wt. % of carbon fiber, up to 80 wt. glass fiber.

In a preferred embodiment, the rear lower rods and side lower rods of the goal structure of the present invention are made of a composite comprising:

- 75 wt. epoxy resin matrices

- 25 wt. reinforcements containing

100 wt. glass fiber.

It is understood that the plastic or composite material for manufacturing the goal according to the invention may contain, in addition to the above-mentioned components, suitable additives, excipients and / or fillers, such as e.g. heat stabilizers, UV stabilizers, UV absorbers, antioxidants, pigments, dyes and others.

The gate construction according to the invention can be made by any conventional method suitable for the type of material from which the gate is made, e.g. by pulling, welding, injection molding, pressing, blowing, knitting, wrapping, wrapping, and the like.

The construction of the goal according to the present technical solution can be used wherever a mobile sports goal is needed, for example in sports fields, be it sports grounds of sports clubs or public sports grounds, school playgrounds, playgrounds. The gate according to the present invention can also be used as a fixed gate after suitable attachment to the ground.

The present technical solution will be explained below using the examples and the attached drawings, which do not limit the scope of the present invention in any way. Although the technical solution will be explained on the example of a soccer goal, it should be understood that the technical solution is not limited to a soccer goal, but also includes a goal applicable to other sports, e.g. handball, hockey, lacrosse and the like, or modifications thereof such as e.g. futsal, beach football, national handball, beach handball, hockeyball, in-line hockey, and so on, where the specific dimensions of the respective goal are given by the requirements and rules of that sport or universal goal intended for use on public sports grounds, school playgrounds and playgrounds. The expert is able, based on the description of the technical solution and the requirements of a particular sport, to realize the goal according to the technical solution for any sport as well as in non-standard sizes suitable for the selected purpose (eg reduced for playgrounds etc.).

· ·

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a perspective view of one embodiment of a mobile gate structure according to the present invention.

Fig. 2 schematically shows a side view of the goal structure in stable positions S1 and S2 and labile position L.

EXAMPLES

Example 1 - construction of a mobile sports goal

One embodiment of a mobile sports goal construction according to the present invention (see Fig. 1) comprises:

• two vertical bars 3;

A horizontal beam 1 connecting the upper ends of said vertical bars 3, wherein the joints of each of the lateral ends of the horizontal beam 1 and each of the upper ends of said vertical bars 3 form upper corners A • a horizontal rear lower rod 2 mounted behind the vertical plane formed by said vertical bars 3; said horizontal beam 1 in a horizontal plane running through the lower ends of the vertical bars 3, the horizontal rear lower rod 2 extending along a line parallel to the line folded by the lower ends of said vertical bars 3;

Lateral lower bars 4 extending from the lower ends of said vertical bars 3 beyond the vertical plane formed by said vertical bars 3 and said horizontal crossbar 1 and connecting the lower ends of said vertical bars 3 to the lateral ends of said horizontal rear lower bar 2, the joints of each of the front the ends of said lateral lower bars 4 and each of the lower ends of said vertical bars 3 form the front lower corners B and the joints of each of the rear ends of said side lower bars 4 and each of the lateral ends of said horizontal rear lower rod 2 form the rear lower corners C.

The center of gravity of the gate in its working position is at a distance of 65% of the depth from the plane defined by the vertical bars. It is also at a distance of 28% of the height of the goal from the plane defined by the lower side bars and is at a distance of 50% of the width of the goal from the plane determined by the vertical bar and the adjacent lower side bar.

Example 2 - construction of a mobile football goal:

A mobile football goal was constructed with the following parameters:

height of vertical bars 3: 2m length of horizontal beam 1 and rear lower bar 2: 5 m r

length of side lower bars 4: 1,5 m weight of beam 1: 7,5 kg weight of upper corner A: 1,5 kg total weight of beam 1 + upper corners A = 10,5 kg weight of vertical bar 3: 3 kg weight of side lower bars 4: 2.25 kg front lower corner weight B: 1.5 kg rear lower rod weight 2: 7.5 kg rear lower corner weight C: 13.25 kg total rear lower rod weight 2 + rear lower corners C: 35 kg ratio of the weight of the rear lower bar 2 and the rear lower corners C to the weight of said horizontal beam 1 and the upper corners A: 3,33: 1 composition of the beam 1: 25 wt. % SCHELL epoxy resin matrix, 75 wt. % reinforcement containing 30 wt. % carbon fiber (TORAY T700) and 70 wt. % of glass fiber (eglass OWENS CORNING) composition of vertical bars 3: 25 wt. % SCHELL epoxy resin matrix, 75 wt. % reinforcement containing 10 wt. % of carbon fiber (TORAY T700) and 90 wt. % e-glass OWENS CORNING composition of rear bottom bar 2 and side bottom bars 4: 25 wt. % SCHELL epoxy resin matrix, 75 wt. % reinforcement containing 100 wt. glass fiber (e-glass OWENS CONING))

Example 3

The design of the gate according to Example 2 (Gate I - composite) was tested together with prior art gate (Gate II - steel, Gate III 8) to determine their center of gravity (T) and other parameters resulting from the center of gravity location. (see Fig. 2). The results are shown in the following tables:

Table 1

Position of the center of gravity mass Diameter of the beam Character of the beam xt yt m r (M) (M) (Kg) (M) Gate I composite -0.67 0.61 59 0,094 round cross section Gate II - steel -0.56 0.96 78 0,049 round cross section Gate III dural -0.24 1.39 50 0.1 to 0.117 oval cross section

Table 2

Angular velocity on impact Absolute speed of beam at impact Moment of inertia to the heel omega in the crossbar lp (Rads-1) (Ms-1) (Kg · m2) Gate I composite 2.2 4,422 56.5 Gate II - steel 1,835 3.68835 250.6 Gate III dural 4.38 8.8038 59.9

These tests clearly show that the goal according to the present invention has the center of gravity positioned most rearward (x-axis position) and lowest (y-axis position).

From the data obtained in the tests, the rollover energy values (ES1-L) and the minimum kinetic energy at impact (E L-S2) were then calculated as shown in the following table:

Table 3

ES1-L (J) EL-S2 (J) Gate I composite 171 137 Gate II - steel 116 422 Gate III dural 10 574

It is clear from the results that the goal according to the present invention is the most stable, since the most energy is needed to flip it. If the goal is already rolled, the kinetic energy of the goal according to the present invention is the lowest, which again demonstrates the increased safety of the goal according to the present invention.

Example 4

An analysis was made to ensure the safety of the gates used according to EN 748 and related aspects concerning the properties of the individual materials (steel, dural, composite materials), in particular the dynamic analysis of the fall of the sports goal, and the following results were calculated:

Table 4 - kinetic energy of falling goal, person 50 kg (holding)

m (kg) E _k (J) steel gate 60 1175 aluminum gate 45 1276 aluminum gate 30 1743 composite gate 45 807

Table 5 - Kinetic energy of falling goal, person 50 kg (released)

m (kg) E _k (J) steel gate 60 461 aluminum gate 45 559 aluminum gate 30 348 composite gate 45 124

Table 6 - kinetic energy of falling goal, person 30 kg (holding)

m (kg) E _k (J) steel gate 60 498 aluminum gate 45 218 aluminum gate 30 851 composite gate 45

In both cases with a 50 kg person, it is clear that the kinetic energy is the lowest for the composite gates, demonstrating their increased safety. For a person weighing 30 kg, the composite gate does not even get healed at all and there is no danger of the gate falling.

List of reference marks horizontal beam rear lower bar vertical bar side lower bar

And the top corner

B front lower corner

C rear lower corner

Claims (10)

PROTECTION REQUIREMENTS 1. A mobile sports goal structure comprising: - two vertical bars (3) - a horizontal rear lower bar (2) located behind a vertical plane formed by said vertical bars (3) and said horizontal crossbar (1) in a horizontal plane running through the lower ends of the vertical bars (3), which horizontal rear lower bar (2) extends along a line parallel with a straight line folded at the lower ends of said vertical bars (3); and - lateral lower bars (4) extending from the lower ends of said vertical bars (3) beyond the vertical plane formed by said vertical bars (3) and said horizontal crossbar (1) and connecting the lower ends of said vertical bars (3) to the lateral ends of said horizontal a rear lower rod (2), wherein the joints of each of the front ends of said side lower rods (4) and each of the lower ends of said vertical bars (3) form front lower corners (B) and joints of each of the rear ends of said side lower rods (4) ) and each of the lateral ends of said horizontal rear lower rod (2) form rear lower corners (C), characterized in that the ratio of the weight of said rear lower rod (2) and rear lower corners (C) to the weight of said horizontal crossbar (1) ) and the top corners (A) is greater than or equal to 2.5: 1. A mobile sports goal structure according to claim 1, characterized in that the ratio of the weight of said rear lower rod (2) and rear lower corners (C) to the weight of said horizontal beam (1) and upper corners (A) is 3: 1 to 7: 1, more preferably 3: 1 to 5: 1. The mobile sports goal structure according to claim 1, characterized in that the ratio of the weight of said rear lower rod (2) and rear lower corners (C) to the weight of said horizontal beam (1) and the upper corners (A) is 3.5: 1 to 4: 1. The mobile sports goal structure according to any one of the preceding claims, further comprising means for suspending and tensioning the net, such as rods, hooks, carabiners, eyelets, ropes and the like. * * · J ··········· · · The mobile sports goal structure according to any one of the preceding claims, further comprising means for facilitating movement of the goal, such as wheels or anchors. Mobile sports goal structure according to any one of the preceding claims, characterized in that it is made of plastic or composite material. Mobile sports goal structure according to claim 6, characterized in that the composite material comprises a plastic matrix or, more preferably, a resin and fiber reinforcement. A mobile sports goal structure according to claim 7, characterized in that the horizontal goal beam (1) is made of a composite comprising 20-75% by weight of the composition. % matrix and 80 - 25 wt. % of a reinforcement comprising 10 to 40 wt. % of carbon fiber and 90 to 60 wt. glass fiber, the vertical bars (3) are made of a composite containing 20-75 wt. % matrix and 80 - 25 wt. % of the reinforcement comprising 5 to 20 wt. % of carbon fiber and 95 to 80 wt. glass fiber, and the rear lower rod (2) and the side lower rods (4) are made of a composite comprising 20-75 wt. % matrix and 80 - 25 wt. % reinforcement containing 100 wt. glass fiber, and the rear bottom bar (2) is hollow and at least partially filled with filler material to increase weight. A mobile sports goal structure according to claim 7, characterized in that the horizontal goal beam (1) is made of a composite containing 25% by weight of the composition. % matrix and 75 wt. % reinforcement containing 30 wt. % of carbon fiber and 70 wt. glass fiber, the vertical bars (3) are made of a composite containing 25 wt. % matrix and 75 wt. % reinforcement containing 10 wt. % of carbon fiber and 90 wt. the glass fiber and the rear lower rod (2) and the side lower rods (4) are made of a composite containing 25 wt. % matrix and 75 wt. % reinforcement containing 100 wt. glass fiber, and the rear lower rod (2) is hollow and at least partially filled with filler material to increase weight. A mobile sports goal structure according to any one of the preceding claims, characterized in that it is intended for football.