SPORTS FLOORING

Abstract: Improved sports flooring for practicing sports indoor as in sports halls, for example basketball, football, handball, volleyball, etc. It has improved biomechanical characteristics and the vertical bouncing height is higher than 90 %, having also a friction coefficient appropriate to run and rotate rapidly. It is comprised of a pair of marine plywood panels (1, 3) adhered to each other with an angular offset of 45°. Support pads (2) made of rubber or the like, in contact with the ground, are added or stapled to the lower panel (1). On the visible face of the second marine panel (3) is applied a layer of glue for laying sticking the agglomerated cork sheets (4), in a joined configuration. Finally, two varnish layers (5) are applied.

Description: SUBJECT OF THE INVENTION The present invention, as stated in this specification, relates to an improved sports flooring which affords considerable functional and practical advantages over products currently existing on the market. This new indoor flooring uses, as its principal material, pressed cork, with the following advantages: The cost of the final product is much lower than for current flooring types. It is a highly natural and ecological product since the amount of material used is much less than in other floorings. It is an excellent thermal insulator and acoustic corrector. It provides optimum vibration insulation as well as a very high mechanical strength. Moisture has virtually no effect on its structure or dimensional stability. It has a high level of non-combustibility as well as great resistance to chemical agents, parasites and microorganisms. Its fundamental component (pressed cork) is abundant in Spain, since it is one of the principal producer countries. Its service life is substantially greater than other floorings, requiring, once laid, minimum maintenance which would, in any case, be merely an infrequent sanding and varnishing process. Sports flooring must be designed as a function of the sport which is to be played on it. The type of sport and its rules define the characteristics which could be called "federative" or "statutory": dimensions, bounce of the ball, etc. These statutory requirements originate from the traditional rules of the sport and from the sports accessories used: balls, poles, goal mouths, etc. However, once these minimum requirements have been complied with, the flooring has to adapt to the athlete, helping the latter to improve their performance and providing protection from possible injury. These latter are the biomechanical characteristics of the flooring. Of course, there are also current regulatory requirements in respect of construction and requirements in respect of durability and maintenance. The flooring proposed is designed as indoor flooring for sports halls. These are types of flooring on which sports such as basketball, football, handball, volleyball, etc., will be played. In view of the aforesaid, the most important statutory requirement it has to fulfil is that relating to the vertical bounce of the ball. The most important biomechanical characteristics which have to be assessed with regard to this type of flooring are: damping of impacts and friction between footwear and the floor. BACKGROUND OF THE INVENTION Currently, use is being made of sports flooring composed of various wooden elements which are glued, joined or assembled together. These types of flooring are very expensive and require the felling of a spectacular number of trees for their manufacture. They are, in turn, attacked by moisture, and are also easily combustible, their biomechanical characteristics (impact absorption, friction between footwear and floor, etc.) not being very acceptable. Moreover, the bounce of the ball on this type of flooring rarely reaches 90% of the bounce height required by the various international federations. CH-A-371 247 discloses a sports flooring consisting of a resilient base or support, a number of floor sheets and an upper floor sheet which is covered by a cover sheet. The resilient base can be made of rubber particles bound by an asphalt emulsion. The floor sheets comprise a leveling layer of filler material and a stabilizing and insulation sheet made of cork coating reinforced by tissue and having a thickness of 2 to 6 mm. The cover sheet is made of a polyvinyl resin. This sports flooring is resilient and soft. In addition it does not vibrate. In US-A-5 299 401 an athletic flooring system is described which has a number of floor sheets formed of spruce-pine fir boards and which are arranged on a resilient pad and are covered by an outer floor. DESCRIPTION OF THE INVENTION The improved sports flooring which is the subject of the invention according to the features of claim 1 overcomes all the drawbacks listed, thereby constituting a technical solution, with very advantageous future prospects since it manages to optimize the ideal specifications within the basic parameters to be taken into account in defining the quality of sports flooring. In general terms, the structure of the improved sports flooring is determined by the combination of a double floor of marine plywood panelling which is multilaminar and preferably 24 mm in thickness, with sheets of agglomerated and pressed cork of approximately 550 kg/m 3 density, varnished with two coats of varnish on their upper face and all this being supported by elements made from gum or rubber which insulate it and rest on the ground. The rubber elements are fastened to one of the sheets of marine panelling, specifically to the lower one, and the second sheet of marine panelling is arranged and joined to it by means of glue, with the particular feature that, with respect to the lower sheet, it has an angular offset when assembled of 45°. This whole assembly is securely stapled and glued. A coat of glue is then applied to the second sheet of marine panelling and the sheets of agglomerated and pressed cork are then laid, arranged in a joined configuration. Lastly, two coats of varnish are applied and allowed to dry, the structure and configuration of the new flooring being regarded as completed. Thus, the sports flooring has high biomechanical characteristics in which the vertical height of the bounce of the ball is in excess of 90%, achieving a suitable coefficient of friction to permit rapid movements and turns. To facilitate understanding of an embodiment of the invention, and forming an integral part of this specification, a page of drawings is attached in whose figures, in an illustrative and non-limiting manner, the following has been shown: BRIEF DESCRIPTION OF THE DRAWINGS Figure 1. - This is a diagrammatic view in section showing the various layers of the improved sports flooring in accordance with the invention. Figure 2. - This is a diagrammatic plan view showing the angular offset in placing the marine plywood panels. DESCRIPTION OF THE PREFERRED EMBODIMENT With reference to the numbering adopted in the figures, it is possible to see how the improved sports flooring proposed by the invention consists of a first panel 1 of multilayer marine plywood resting on the ground by means of the pads or supports 2 made from rubber, gum or the like, these elements 2 being previously fixed to the panel 1, preferably by means of gluing or stapling. As shown in Figure 2, the second marine plywood panel 3 is stapled and glued securely on the panel 1 and in an arrangement which is angularly offset by 45°. Reference 4 denotes the sheet of agglomerated and pressed cork with a density of approximately 550 kg/m 3 , as indicated previously. Lastly, two coats of varnish are applied to finish the flooring. The coat of varnish has the reference number 5.

Claims: Sports flooring, consisting of a resilient support (2), a number of floor sheets (1, 3, 4), the upper floor sheet (4) being a cork sheet and being covered by a cover sheet (5), characterized in that the flooring consists essentially of the combination of a double floor made from multilaminar marine plywood panelling (1-3) of approximately 24 mm thickness, with sheets of agglomerated and pressed cork (4) as the upper floor sheet with a density of approximately 550 kg/m 2 , which is varnished on its visible face, the varnish being the cover sheet, all this being supported by elements or pads (2) made from gum, rubber or the like, which insulate it and rest on the ground, these pads (2) being fixed to the lower sheet (1) of marine panelling, provision having been made for the second sheet of marine panelling (3) to have an angular offset of 45° with respect to the first (1), both panels (1, 3) being glued and stapled, and in that the sheets (4) of agglomerated cork are laid and glued on the second sheet (3) of marine panelling, in a joined configuration.

Inventors: MENCHETA CABALLERO JOSEP LLUIS, MENCHETA CABALLERO, JOSEP LLUIS
Applicants: MENCHETA CABALLERO JOSEP LLUIS, MENCHETA CABALLERO, JOSEP LLUIS
Application year: 1995
Main classification: E04F15
IPC codes: E04F15