EP2154291A1 - Spieloberfläche und Verfahren zur Herstellung einer Spieloberfläche - Google Patents
Spieloberfläche und Verfahren zur Herstellung einer Spieloberfläche Download PDFInfo
- Publication number
- EP2154291A1 EP2154291A1 EP08252713A EP08252713A EP2154291A1 EP 2154291 A1 EP2154291 A1 EP 2154291A1 EP 08252713 A EP08252713 A EP 08252713A EP 08252713 A EP08252713 A EP 08252713A EP 2154291 A1 EP2154291 A1 EP 2154291A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- playing surface
- foam layer
- projections
- layer
- foam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 6
- 239000006260 foam Substances 0.000 claims abstract description 118
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000004746 geotextile Substances 0.000 claims description 24
- 239000004831 Hot glue Substances 0.000 claims description 6
- -1 polypropylene Polymers 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000005755 formation reaction Methods 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000004575 stone Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 206010019196 Head injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C13/00—Pavings or foundations specially adapted for playgrounds or sports grounds; Drainage, irrigation or heating of sports grounds
- E01C13/08—Surfaces simulating grass ; Grass-grown sports grounds
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C2201/00—Paving elements
- E01C2201/14—Puzzle-like connections
Definitions
- This invention concerns a playing surface and a method of manufacturing a playing surface.
- the invention has particular, but not exclusive, application to playing surfaces for use in children's playgrounds or other situations wherein a user could fall from a significant height, such as situations wherein the Critical Fall Height is required to be 2.4 metres or more.
- the surface used for playgrounds and the like must be chosen such that the Critical Fall Height matches or exceeds the maximum height from which a user can fall from the play equipment.
- BS EN 1177 defines the Critical Fall Height test.
- a 4.6kg spherical 'headform' representing a child's head is dropped from various heights onto a test surface, and the time the headform is in contact with the surface and its peak deceleration is measured.
- a stiffer surface reduces the time a head is in contact with the surface but this has to be balanced with the peak deceleration, which increases with increases in stiffness.
- the Critical Fall Height is the height at which the Head Injury Criterion (HIC) is 1000.
- g gravitational force
- the playing surface should be kept as shallow as possible to reduce the amount of excavating work that needs to be done to lay the playing surface.
- a playing surface comprising a foam layer having a top surface and a plurality of downwardly extending energy dissipating projections and a fibrous carpet layer overlying the top surface of the foam layer, wherein the plurality of the energy dissipating projections are arranged to dissipate energy of an impact through deformation to significantly affect a Critical Fall Height of the playing surface.
- the arrangement of the plurality of the projections may result in the playing surface having a Critical Fall Height significantly greater, for example 10cm, 20cm or 1m greater, than a Critical Fall Height that would be achieved with a foam layer of the same material and foam density having a flat bottom surface.
- the size and shape of the projections can affect the Critical Fall Height of the playing surface.
- the projections should have a height of at least 10mm and preferably, between 10mm and 20mm. It has been found that the size of the projections can affect the performance of the playing surface at different fall heights and it is believed that projections having a height of between 10mm and 20mm give a good balance between the performance at the lower and higher fall heights.
- the foam layer is expanded polypropylene.
- the foam density may be at least 25 grams per litre and preferably, between 30 grams per litre and 40 grams per litre. Foam densities below 25 grams per litre have a tendency to come apart, in use. Foam densities above 40 grams per litre may be too stiff resulting in a Critical Fall Height of the playing surface of less than 2.4 metres or requiring thicker projections to achieve a 2.4 metre Critical Fall Height, if this is possible at all, resulting in a playing surface having a thickness that is impractical to use.
- the foam layer has a thickness (excluding the projections) of between 40mm and 65mm.
- the base needs to be stiff enough to avoid “bottoming out” on the hard supporting surface, such as a concrete surface, when a person falls onto the surface but kept as shallow as possible to reduce the amount of excavating that needs to be done to lay the surface.
- a foam layer having a thickness of less than 40mm may be too weak at the typical foam densities used for playing surfaces, which may result in the foam layer breaking up in use.
- a foam layer having a thickness of more than 65mm may be too stiff at the typical foam densities used for playing surfaces, the impact of the headform not penetrating much further than 65mm and therefore, not being dissipated by the projections.
- Each projection may have a free end that, in use, contacts a surface supporting the playing surface, the projection having a shape that narrows towards the free-end.
- the shape of the projection can affect the profile of how energy is dissipated by the projections during an impact and it is believed that narrowing projections provide a profile that reduces peak deceleration and therefore, the HIC value.
- the projections may be dome shaped. Dome shaped projections perform particular well in use, however, other shaped projections may be used such as pyramid, tetrahedron, cone, wedge shaped, a frustum of these shapes or any other suitable shape.
- the disadvantage of projections that end in points (such as pyramids, tetrahedrons and cones) that contact the supporting surface is that the point can break off in use.
- the foam layer may comprise one or more holes extending from the top surface to the bottom surface of the foam layer.
- the holes may allow water to drain from the top surface of the playing surface.
- the projections provide channels below the foam layer for water to drain from the area covered by the playing surface.
- the playing surface may comprise a geotextile layer between the foam layer and the carpet layer.
- the geotextile layer may protect the foam layer during laying of the carpet, in particular, the carpet layer may be formed from rolls/strips of carpet connected together using a hot melt adhesive and the geotextile layer protects the foam layer being damaged from the heat. Furthermore, the geotextile layer may increase the load bearing capacity of the playing surface, reducing damage to the foam layer during an impact.
- the top surface of the foam layer may comprise a rough surface that contacts the geotextile or carpet layer to provide high frictional resistance to relative movement between the layers.
- the rough top surface may comprise a plurality of upwardly extending projections, for example upwardly extending projections that produce a course top surface.
- the upwardly extending projections are small relative to the thickness of the foam layer and the height of the energy absorbing projections, for example having a height of less than 0.5mm, the upwardly extending projections having minimal impact on the energy absorbing capability of the foam layer but increasing the frictional resistance of the top surface.
- the projections may be irregular.
- the playing surface may comprise two or more foam layers, each foam layer having a top surfaces and a plurality of downwardly extending energy dissipating projections.
- the foam layers may be stacked consecutively on top of each other. It is believed that the provision of multiple foam layers will further increase the Critical Fall Height of the playing surface.
- the projections provide channels from the holes in one foam layer to the holes in another foam layer for water to drain. Without the channel between the projections, the drainage holes of consecutive layers would have to be aligned, increasing the costs of installation.
- the foam layer may comprise a plurality of interlocked tiles, each tile having formations for cooperating with formations on the other tiles for interlocking the tiles together. Forming the foam layer from a plurality of tiles simplifies laying of the carpet layer. The interlocking of the tiles reduces relative movement between the tiles, in use.
- a method of manufacturing a playing surface comprising forming a foam layer having a top surface and a plurality of downwardly extending energy dissipating projections, wherein the plurality of the energy dissipating projections are arranged such that, when the foam layer is used as part of a playing surface with a fibrous carpet layer overlaying the foam layer, the plurality of projections dissipate energy of an impact through deformation to significantly affect a Critical Fall Height of the playing surface.
- a method of laying a playing surface comprising laying a foam layer having a top surface and a plurality of downwardly extending energy dissipating projections and overlaying the foam layer with a fibrous carpet layer, wherein the plurality of the energy dissipating projections are arranged such that, when the foam layer is used as part of a playing surface with a fibrous carpet layer overlaying the foam layer, the plurality of projections dissipate energy of an impact through deformation to significantly affect a Critical Fall Height of the playing surface.
- the plurality of the projections may be arranged such that the playing surface has a Critical Fall Height of at least 2.4 metres.
- the method may comprise providing laying a geotextile layer over the foam layer and laying the carpet layer over the geotextile layer, the carpet layer comprising a series of carpet strips connected together by a hot melt adhesive, the geotextile layer arranged to protect the foam layer form heat used in applying the hot melt adhesive.
- a playing surface comprises a foam layer 1 and a fibrous carpet layer 2 overlying the top surface of the foam layer 1.
- Located between the foam layer 1 and the carpet layer 2 is a geotextile layer 3.
- the fibrous carpet layer 1 comprises a pile (e.g. a yarn that stands up from the backing), which may be considered synthetic grass.
- the pile of the carpet layer may be polypropylene needle punched surface having a 12 to 14 mm pile (14 to 16 mm total thickness including the backing).
- the pile may have an open fibrous structure having randomly oriented fibres, as described in European Patent No: 0174755 .
- the geotextile layer 3 may be 2mm thick needle punched polyester material.
- the foam layer 2 comprises a plurality of interlocked tiles 5 (one of which is shown in Figures 2 to 6 ), each tile having connecting formations, in this embodiment trapezoidal recesses 4 f or cooperating with corresponding trapezoidal protrusion 6 on the other tiles, for interlocking the tiles 5 together.
- Each tile 5 has a top surface 7 and a bottom surface 8.
- the top surface 8 has a rough texture that contacts the geotextile layer 3 to provide high frictional resistance to relative movement between the foam layer 1 and the geotextile layer 3.
- the high frictional resistance may prevent movement of the geotextile layer 3 or carpet layer 2 relative to the foam layer 1 when subjected to lateral forces.
- the foam layer 1 further comprises a plurality of downwardly extending energy dissipating projections 9.
- the projections 9 are of a shape, in this embodiment dome shaped, such that the projections 9 narrow towards a free end 11 (in this embodiment an apex 11 of the dome) that contacts a surface supporting the playing surface. It will be understood that in other embodiments, other shapes may be used for the projections 9.
- the projections 9 have a height (the vertical distance from a valley between the projections to the apex 11 of the projections 9) of approximately 15mm and, in this embodiment in which the projections 9 have a dome shape a diameter of approximately 30mm.
- the projections 9 are arranged in a pseudo-hexagonal packing arrangement with each projection 9 being close to but being spaced from adjacent projections 9 by a predetermined distance, as indicated by rings 11 around each projection 9. It will be understood that rings 11 are included in the drawings to illustrate that the projections 9 do not meet and these regions are flat and are part of the valley between the projections 9.
- the foam layer 1 is expanded polypropylene having a foam density of 30 grams per litre and the thickness of the foam layer from the top surface to a valley of the bottom surface is 40mm.
- the foam layer 1 may comprise one or more holes (not shown) extending from the top surface 7 to the bottom surface 8 that allow water to drain from the playing surface.
- the projections 9 provide channels below the foam layer 1 for water to drain from the area covered by the playing surface.
- a combination of foam density of the foam layer 1 and an arrangement of the plurality of the projections 9 significantly affects a Critical Fall Height of the playing surface.
- the projections 9 are arranged to deform into the spaces to dissipate energy during an impact. It has been found that the combination of features of the foam layer 1 of the above-described embodiment results in the playing surface having a Critical Fall Height of up to 1.4 metres.
- the foam layer 1 has a thickness of 65mm.
- the Critical Fall height of this playing surface may be at least 2.4 metres.
- Figure 8 shows another embodiment of a playing surface according to the invention.
- the playing surface comprises two foam layers 1' and 1" stacked consecutively on top of each other. It is believed that the provision of multiple foam layers further increases the Critical Fall Height of the playing surface.
- the carpet layer 2 and the geotextile layer 3 may be manufactured in a conventional manner.
- the foam layer 1 is manufactured by moulding the foam layer 1 in a suitably shaped mould, for example by injection moulding. During the moulding process, the top surface 7 is formed with a rough texture of relatively small projections.
- Laying of the playing surface is typically carried out by digging out a recess in the ground and, optionally, lining the ground with stone, the stone providing a level supporting surface.
- the tiles forming the foam layer 1 are then placed on the stone surface, the tiles being interlocked together by recesses 4 and protrusions 6, such that at least the apexes (free ends) of the projections 9 contact the stone.
- Sheets forming the geotextile layer 3 are placed over the foam layer 1 and rolls of carpet layer 2 are placed over the geotextile layer 3.
- the rolls of carpet may be secured together at the joints by introducing using a hot-melt adhesive at the seams. It has been found that the geotextile layer 3 advantageously protects the foam layer 1 from the heat used in this process.
- the playing surface of this embodiment is suitable for external use, such as on children's playgrounds.
- the table below shows the results of measurements of HIC for a playing surface according to the invention having 15mm energy absorbing projections and a playing surface having a foam tile with no energy absorbing projections.
- the playing surfaces with foam tiles having the 15mm projections can achieve a lower HIC value for higher fall heights. Accordingly, these measurements show that the energy absorbing projections affect the Critical Fall Height of the playing surface.
- the foam layer may be made of other suitable materials, such as polyurethane, expanded polyethylene and expanded polystyrene.
- a separate additional layer may be adhered to the top surface of the foam layer, this additional layer having an upper surface that provides a high frictional resistance to movement of the geotextile layer 3.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laminated Bodies (AREA)
- Floor Finish (AREA)
- Road Paving Structures (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08252713.6A EP2154291B8 (de) | 2008-08-15 | 2008-08-15 | Spieloberfläche, Verfahren zur Herstellung einer Spieloberfläche und Verfahren zum Verlegen einer Spieloberfläche |
PL08252713T PL2154291T3 (pl) | 2008-08-15 | 2008-08-15 | Powierzchnia do zabawy, sposób wytwarzania powierzchni do zabawy i sposób układania powierzchni do zabawy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08252713.6A EP2154291B8 (de) | 2008-08-15 | 2008-08-15 | Spieloberfläche, Verfahren zur Herstellung einer Spieloberfläche und Verfahren zum Verlegen einer Spieloberfläche |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2154291A1 true EP2154291A1 (de) | 2010-02-17 |
EP2154291B1 EP2154291B1 (de) | 2013-11-06 |
EP2154291B8 EP2154291B8 (de) | 2013-12-18 |
Family
ID=40084412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08252713.6A Active EP2154291B8 (de) | 2008-08-15 | 2008-08-15 | Spieloberfläche, Verfahren zur Herstellung einer Spieloberfläche und Verfahren zum Verlegen einer Spieloberfläche |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2154291B8 (de) |
PL (1) | PL2154291T3 (de) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013093471A1 (en) * | 2011-12-23 | 2013-06-27 | Playsmart International Limited | Surface |
WO2016073021A1 (en) | 2014-11-05 | 2016-05-12 | Viconic Sporting Llc | Surface underlayment system with interlocking resilient anti-slip shock tiles |
US9528280B2 (en) | 2013-04-18 | 2016-12-27 | Viconic Sporting Llc | Surface underlayment system with interlocking resilient anti-slip shock tiles |
GB2541001A (en) * | 2015-08-05 | 2017-02-08 | Notts Sport Group Ltd | Playing surface |
EP3354794A3 (de) * | 2017-03-23 | 2018-09-26 | Synprodo B.V. | Trägerschicht zum tragen einer kunstrasenanordnung und kunstrasensystem |
US10369739B2 (en) | 2013-04-18 | 2019-08-06 | Viconic Sporting Llc | Surface underlayment system with interlocking resilient assemblies of shock tiles |
US10982451B2 (en) | 2018-11-07 | 2021-04-20 | Viconic Sporting Llc | Progressive stage load distribution and absorption underlayment system |
US11035083B2 (en) | 2017-03-23 | 2021-06-15 | Synprodo B.V. | Support layer for supporting an artificial turf assembly, and artificial turf system |
US11585102B2 (en) | 2018-11-07 | 2023-02-21 | Viconic Sporting Llc | Load distribution and absorption underpayment system |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0174755A1 (de) | 1984-08-25 | 1986-03-19 | Nottinghamshire County Council | Fussgänger-, Fahrzeug- oder Sportfeldbeläge und Unterlegmatten/Stosskissen |
US4637942A (en) * | 1985-09-23 | 1987-01-20 | Tecsyn Canada Limited | Synthetic grass playing field surface |
EP0276824A2 (de) * | 1987-01-29 | 1988-08-03 | Forbo-Poligras GmbH | Verfahren zur Herstellung einer Polsterelement-Warenbahn für Kunstrasen |
WO2002009825A1 (en) * | 2000-08-02 | 2002-02-07 | Professional Golf Solutions Pty Ltd | A synthetic grass surface |
US20050042394A1 (en) * | 2003-08-20 | 2005-02-24 | Sawyer Daniel C. | Multi-layered sports playing field with a water draining, padding layer |
US20070092694A1 (en) * | 2002-04-02 | 2007-04-26 | Scott Richard P | Impact absorbing safety matting system with elastomeric sub-surface structure |
-
2008
- 2008-08-15 PL PL08252713T patent/PL2154291T3/pl unknown
- 2008-08-15 EP EP08252713.6A patent/EP2154291B8/de active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0174755A1 (de) | 1984-08-25 | 1986-03-19 | Nottinghamshire County Council | Fussgänger-, Fahrzeug- oder Sportfeldbeläge und Unterlegmatten/Stosskissen |
US4637942A (en) * | 1985-09-23 | 1987-01-20 | Tecsyn Canada Limited | Synthetic grass playing field surface |
EP0276824A2 (de) * | 1987-01-29 | 1988-08-03 | Forbo-Poligras GmbH | Verfahren zur Herstellung einer Polsterelement-Warenbahn für Kunstrasen |
WO2002009825A1 (en) * | 2000-08-02 | 2002-02-07 | Professional Golf Solutions Pty Ltd | A synthetic grass surface |
US20070092694A1 (en) * | 2002-04-02 | 2007-04-26 | Scott Richard P | Impact absorbing safety matting system with elastomeric sub-surface structure |
US20050042394A1 (en) * | 2003-08-20 | 2005-02-24 | Sawyer Daniel C. | Multi-layered sports playing field with a water draining, padding layer |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013093471A1 (en) * | 2011-12-23 | 2013-06-27 | Playsmart International Limited | Surface |
US10369739B2 (en) | 2013-04-18 | 2019-08-06 | Viconic Sporting Llc | Surface underlayment system with interlocking resilient assemblies of shock tiles |
US9528280B2 (en) | 2013-04-18 | 2016-12-27 | Viconic Sporting Llc | Surface underlayment system with interlocking resilient anti-slip shock tiles |
WO2016073021A1 (en) | 2014-11-05 | 2016-05-12 | Viconic Sporting Llc | Surface underlayment system with interlocking resilient anti-slip shock tiles |
US9394702B2 (en) | 2014-11-05 | 2016-07-19 | Viconic Sporting Llc | Surface underlayment system with interlocking resilient anti-slip shock tiles |
GB2541001A (en) * | 2015-08-05 | 2017-02-08 | Notts Sport Group Ltd | Playing surface |
GB2542679A (en) * | 2015-08-05 | 2017-03-29 | Notts Sport Group Ltd | Playing surface |
WO2017021696A1 (en) * | 2015-08-05 | 2017-02-09 | Notts Sport Group Limited | Playing surface and method of constructing same |
EP3354794A3 (de) * | 2017-03-23 | 2018-09-26 | Synprodo B.V. | Trägerschicht zum tragen einer kunstrasenanordnung und kunstrasensystem |
US10400399B1 (en) | 2017-03-23 | 2019-09-03 | Synprodo B.V. | Support layer for supporting an artificial turf assembly, and artificial turf system |
US10774481B2 (en) | 2017-03-23 | 2020-09-15 | Synprodo B.V. | Support layer for supporting an artificial turf assembly, and artificial turf system |
EP3792397A1 (de) * | 2017-03-23 | 2021-03-17 | Synprodo B.V. | Trägerschicht zum tragen einer kunstrasenanordnung und kunstrasensystem |
US11035083B2 (en) | 2017-03-23 | 2021-06-15 | Synprodo B.V. | Support layer for supporting an artificial turf assembly, and artificial turf system |
US11225759B2 (en) | 2017-03-23 | 2022-01-18 | Synprodo B.V. | Support layer for supporting an artificial turf assembly, and artificial turf system |
US11634874B2 (en) | 2017-03-23 | 2023-04-25 | Synprodo B.V. | Support layer for supporting an artificial turf assembly, and artificial turf system |
US11639585B2 (en) | 2017-03-23 | 2023-05-02 | Synprodo B.V. | Support layer for supporting an artificial turf assembly, and artificial turf system |
US10982451B2 (en) | 2018-11-07 | 2021-04-20 | Viconic Sporting Llc | Progressive stage load distribution and absorption underlayment system |
US11585102B2 (en) | 2018-11-07 | 2023-02-21 | Viconic Sporting Llc | Load distribution and absorption underpayment system |
Also Published As
Publication number | Publication date |
---|---|
EP2154291B1 (de) | 2013-11-06 |
EP2154291B8 (de) | 2013-12-18 |
PL2154291T3 (pl) | 2014-03-31 |
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