GB2487452A - Endless moving platform with impact absorption - Google Patents

Abstract

A moving platform apparatus comprises a first end roller (200 fig. 4), a second end roller (201 fig. 4), an endless belt (101 fig. 4) extending between said first and second end rollers (200, 201 fig. 4) and a central section 302 comprising a resilient platform over which the endless belt (101 fig. 4) passes. The resilient platform may be in the form of a bed of flexible beams 905 extending across the width of a frame 302, each beam or lat 905 carrying a plurality of plates 906 forming a horizontal plane of tiles. The beams or lats 905 may be formed from carbon fibre. A shock absorbing resilient cushion 304 may be placed upon the plates 906, the cushion being formed from a layer of plastics and/or rubberized impact absorbing material and an external layer having a lower coefficient f friction. The apparatus may be formed from one or more releasably connectable frame sections 302 between first and second roller assemblies (300, 302 fig. 4). An electric motor may be positioned within the first end roller (200 fig. 4) to reduce noise. The moving platform may be used by persons such as contestants in television game shows.

Description

ENDLESS MOVING PLATFORM

Field of the Invention

[0001] The present invention relates to a moving platform.

Background of the Invention

[0002] In the film industry, conveyor belts have been used in the United Kingdom and the United States for game shows, where contestants travel along a moving platform in the form of a conveyor belt in order to reach an objective.

Typically, the moving platforms have a rolling road or rolling track surface which travels at a speed in the range 2 to 3 meters per second.

Summary of the Invention

[0003] Known moving platforms need to be used carefully, and give rise to safety concerns. Persons can easily fall over on the moving surface, and there is a need for contestants to wear safety equipment such as elbow pads, knee pads, and protective helmets.

[0004] In addition to the safety concern, known moving platforms are noisy, which can cause problems for television and film since the microphones pick up the noise of the platform, which interferes with the commentary and sound footage of the contestants.

[0005] According to a first aspect there of the present invention, there is provided a moving platform apparatus comprising: a first end roller; a second end roller; an endless belt extending between said first and second end rollers; and a central section comprising a resilient platform, over which said endless belt passes.

[0006] Specific embodiments according to the invention may have an advantage of improving the safety of a moving platform apparatus, and allowing persons to use a rolling platform without excessive safety clothing.

[0007] Specific embodiments described herein may have an advantage of reduced noise compared to prior art moving platforms.

[0008] Specific embodiments described herein may have an advantage of improved transport, storage and assembly compared to existing known moving platforms.

[0009] Specific embodiments described herein may have an advantage of providing higher belt speeds that have hitherto been considered suitable for known moving platforms.

[0010] Other aspects are as set out in the claims herein.

Brief Description of the Drawings

[0011] For a better understanding of the invention and to show how the same may be carried into effect, there will now be described by way of example only, specific embodiments, methods and processes according to the present invention with reference to the accompanying drawings in which: Figure 1 illustrates schematically in perspective view an embodiment of a moving platform according to the present invention, surrounded by a plurality of external cushion pads; Figure 2 illustrates schematically in perspective view an endless belt and a plurality of rollers comprising the embodiment of Figure 1 herein; Figure 3 illustrates schematically in perspective view from one side, the moving platform of Figure 1 herein; Figure 4 illustrates schematically in plan view, the moving platform of Figure 1 herein; Figure 5 illustrates schematically in plan view a frame and end roller construction of the moving platform of Figure 1 herein; Figure 6 illustrates schematically a first perspective view of a first end roller section and feed roller section; Figure 7 illustrates schematically a second perspective view of a first end roller section and feed roller section of Figure 6; Figure 8 illustrates schematically in perspective view from the rear the first end roller section and feed roller section of Figures 6 and 7 herein; Figure 9 illustrates schematically in perspective view a frame section of the moving platform of Figure 1; Figure 10 illustrates schematically in perspective view from one end, the frame section of Figure 9; Figure 11 illustrates schematically in perspective view an intermediate roller; Figure 12 illustrates schematically in perspective view from above and one side, a frame section of the platform; Figure 13 illustrates schematically a flexible cross beam, together with a plurality of surface pads; Figure 14 illustrates schematically in perspective view from one side, a portion of a cushion layer; Figure 15 illustrates schematically in perspective view from above and one side a second end roller section; and Figure 16 illustrates schematically in perspective view from the front, the first end roller!

Detailed Description of the Embodiments

[0012] There will now be described by way of example a specific mode contemplated by the inventors. In the following description numerous specific details are set forth in order to provide a thorough understanding. It will be apparent however, to one skilled in the art, that the present invention may be practiced without limitation to these specific details. In other instances, well known methods and structures have not been described in detail so as not to

unnecessarily obscure the description.

[0013] Referring to Figure 1 herein, there is illustrated schematically in perspective view, a moving plafform according to a specific embodiment of the invention.

[0014] The moving platform 100 comprises an endless belt 101 travelling around first and second end rollers separated by a frame structure, which supports the belt between the end rollers.

[0015] Typically the platform has a width dimension in the range 1 meter to 4 meters, and in the best mode of the order of 2.5 meters, and a length in the ranqe 5 meters to 25 meters. The dimensions of the moving platform are such that the platform can be used to accommodate a plurality of persons walking in line and/or side by side on the belt at the same time. The platform is also large enough to be used as a rolling road, upon which for example a bicycle, motorized quad bike, motorbike, or similar vehicle can be ridden. The dimensions of the platform are substantially larger than those of a conventional running machine/exercise machine for single person use, such as are found in gymnasiums.

[0016] As shown in Figure 1, in use the moving platform is preferably surrounded by a plurality of cushion blocks or "crash pads" 102, joined together in a ring around the moving platform, such that a person falling off either side of the platform, or either end of the platform, is protected from impact with a floor by the cushions. In the embodiments shown, the cushions may typically be of dimensions in the range 300mm to 600mm in height, 1.0 meter to 1.5 meters in width and 1.0 meter to 1.5 meters depth. The cushions are of dimensions such that an upper surface of the cushions is substantially level with an upper surface of the moving platform.

[0017] Referring to Figure 2 herein, there is illustrated schematically a transport mechanism of the endless belt, without the supporting frame components, to illustrate schematically movement of the endless belt.

[0018] The endless belt 101 comprises a PVC or rubberized sheet, such as is known in use for conveyor belts, for example in the food industry, having dimensions in the range width 1 meter to 4 meters and length in the range 10 meters to 50 meters, although the skilled person would appreciate that the width may either be narrower or wider than these ranges.

[0019] The endless belt 101 is transported between a first driven roller 200 at a first end of the platform, and a second, non-driven roller 201, at a second end of the platform.

[0020] A return portion of the belt on the underside of the platform is supported by a plurality of intermediate rollers 202, 203, the exact number of rollers depending upon the length of the belt, and a number of frame sections; and a guide roller 204 which is adjustable in height, so as to adjust the tension of the belt between the first and second end rollers. In the embodiment shown, the first roller 200 has a substantially larger diameter than that of the second end roller 201. The first end roller 200 contains internally, an electric motor and gearing within the roller itself. All of the rollers have substantially cylindrical outer surfaces.

[0021] Referring to Figure 3 herein, there is shown in view from one side components of the moving platform of Figure 1 herein.

[0022] The platform 100 comprises a first end roller assembly or section 300 at a first end of the platform; a second end roller assembly, or section 300 at a second end of the platform; one or a plurality of intermediate frame sections 302 positioned between the first and second end sections, and a feed roller section 303 positioned adjacent the first end roller section.

[0023] The first end roller 200 is supported by first end roller assembly 300.

Similarly, the second end roller 201 is supported by second end roller assembly 301.

[0024] Extending between the first end roller assembly and the second end roller assembly is provided one or a plurality of platform sections 302, and a feed roller section 303.

[0025] Extending between the first and second rollers, and on top of part of the first end roller assembly, on top of the feed roller assembly, on top of the one or a plurality of frame sections 302, and on top of the second end roller assembly 301 is provided a layer of resilient cushion material 304.

[0026] On the upper surface of the platform, the endless belt 101 extends between the first and second end rollers 300, 301 respectively, resting on the foam cushions 304, over the platform section 302, feed roller assembly 303, and first and second end roller assemblies 300, 301, and on the return, the endless belt passes underneath the foam cushion 304, through the first and second end roller assemblies, through the platform sections 302, and through the feed roller assembly.

[0027] The first end roller section and the second end roller section may each be provided with optional and detachable castor type wheels, preferably four wheels per section, so that the whole platform can be moved on a hard surface, the wheels may also be used to raise the height of the platform.

[0028] Each platform section of the main length of the platform is fabricated from square tubular metal frame, over which are provided a set of a carbon fiber lats. Over the carbon fiber lats is provided a layer of laminated foam, typically of the length in the range 25mm to 75mm, and preferably 50mm, covered with a polyester fiber carpet surface.

[0029] Referring to Figure 4 herein, the platform is illustrated schematically in plan view.

[0030] The platform is fabricated in sections as described herein with reference to Figure 3. The first end roller assembly 300, second end roller assembly 301, feed roller assembly 303 and one or more central platform sections 302 are bolted together to provide a single frame, over which the endless belt travels.

[0031] Substantially the entire upper surface of the platform under the endless belt is covered by the upper protective cushion layer 304, such that a person falling over on the platform would fall onto a section of belt under which there lies a section of foam cushion. The foam cushion layer may be applied either as a single roll of foam cushion layer laid out over substantially the entire length of the platform between the first end roller and the second end roller, or the cushion layer can be assembled as a plurality of individual sections of foam cushion laid end to end and abutting each other over substantially the entire upper surface of the platform.

[0032] At the ends of the platform, the endless belt needs to be in direct contact with the substantially cylindrical surfaces of the first and second end rollers. The foam layer covers substantially the whole of the width of the platform, so that if a person falls down on the belt, they are protected from impact with any of the hard components comprising the frame structure.

[0033] Referring to Figure 5 herein, there is illustrated schematically the components of the platform in view from above, with the foam cover layer removed.

[0034] There are shown the first end roller 200, the second end roller 201, and the feed roller 204. Central frame section 302 comprises a plurality of carbon fiber lats or beams 500 which extend across a width of the frame section 302.

Each lat is provided with a plurality of plastics pads 501, such that a row of pads are slid along a length of each lat to provide a substantially continuous and flat upper surface, which at the same time is capable of bending to accommodate pressure from above. The carbon fiber lats are resilient and allow a springiness to the load bearing surface of the frame section 302, such that the surface can absorb shocks, and absorb energy from a falling person.

[0035] A plurality of substantially parallel carbon fiber lats extend across a width of the frame section 302, and the pads in this embodiment, are arranged in rows and columns so that in view from above, they present a tiled appearance.

[0036] Referring to Figure 6 herein, there is illustrated schematically the first end roller assembly 301 and feed roller section 303.

[0037] The first end roller assembly 301 comprises first end roller 200, a sub-frame 600 comprising a lower cross member 601 extending between a first foot member 602 and a second foot member 603; first and second upright members 604, 605 respectively; respective first and second bearings to hold the first drum 200; and first and second rear upright members 606, 607, respectively positioned at opposite sides of the sub-assembly 600.

[0038] Referring to Figure 7 herein, there is illustrated schematically in a second perspective view, the first end roller section and feed roller section of Figure 6.

[0039] Referring to Figure 8 herein, there is illustrated schematically in perspective from the rear the first end roller section and feed roller section of Figures 6 and 7 herein.

[0040] Feed roller section 303 comprises a first upright side member 608; second upright side member 609; first side plate 610, adjacent the first upright member 608, the first side plate containing a first bearing; a second side member 611 comprising a second side plate and containing a second bearing; and feed roller mounted on the first and second bearings and extending across a width of the feed roller section; and an upper cross member extending across a width of the feed roller section and connecting the first and second side members.

[0041] First and second connecting plates 612, 613 respectively are attached to the upper portions of respective first and second side members 610, 611, for connecting the feed roller section to an adjacent said frame section 302.

[0042] The first roller 200 comprises a substantially cylindrical drum, externally coated with a material which will grip the undersurface of the endless belt, in order to drive the belt. For example the surface of the drum may comprise a rubber material. Within the drum is provided an electric motor and gearing.

Electrical connections are made to the motor via an external connector 614 which protrudes from one end of the drum.

[0043] The motorized drum reduces the noise to around 7 decibel (dB), since the noise of the motor operating is contained within the drive drum.

[0044] The speed of the belt can reach up to 7 to 8 meters per second, which is faster than known prior art rolling platforms. Existing motorized drums for conventional conveyor belt applications generally operate in the range 2 meters per second to 3 meters per second belt speed, and generally have electric motors outside the drum. In order to achieve the increased belt speed and reduce motor noise, the inventors have had a new motorized drum made with modified gearing.

[0045] The speed of the belt is continuously variable over the range 0 to 8 meters per second by varying the drive current to the motor.

[0046] In the first end roller section shown in Figures 6 to 8 herein, the surface underneath the cushion layer 304 consists of a sheet of metal. However, in other embodiments, a resilient bed comprising a plurality of carbon fiber lats, together with associated pad members as described herein after may be provided, in order to provide a fully shock and impact absorbing surface immediately adjacent the first end roller 200 at the first end of the platform.

[0047] Referring to Figure 9 herein, there is illustrated schematically in perspective view, a single frame section 302.

[0048] The frame section comprises a first frame cross member 900 at a first end of the frame; a second frame cross member 901 at a second end of the frame; a first side member 902 at a first side of the frame; a second side member 903 at a second side of the frame; and a plurality of elongate beams or lats 905 extending across a width of the frame between the first and second side members 902, 903.

[0049] Each beam or lat 905 is fitted with a plurality of pad or plate members 906, each of which presents a flat upper surface, which extends in cantilever fashion forward and backward of the beam or lat 905, so that in combination a plurality of the plate or pad members present a substantially flat, but flexible bed on which the foam cushion layer can be placed. Each lat is formed of a carbon fiber material, which gives the lat flexibility and allows the lat to bend, without breaking. The plurality of lats laid side by side across a width of the plafform provide a resilient springy surface capable of carrying the weight of one or more persons, or a light vehicle such as a motorcycle, or quad bike.

[0050] The plurality of lats, in combination with the overlaid foam cushion provide a surface, over which the endless belt travels, which provides a soft landing in case a person falls over onto the surface, and thereby is safe and provides reduced risk of injury.

[0051] The first frame cross member 900 comprises a rigid lower portion 907 comprising first and second upright members 908, 909 connected by a pair of cross beams 910, 911. Strengthening bars 912 are welded between the cross beams 910, 911 to give extra rigidity and strength. Above the lower section is provided an open aperture, through which the endless belt can travel on its return journey underneath the lats 905.

[0052] Welded to the first and second upright members are a pair of roller mount brackets 913, 914 respectively. Each of which provides a substantially "U" shaped slot into which an end axle of an intermediate roller 204 may be dropped, such that the roller is retained in the slots by gravity. The intermediate roller supports the passage of the endless belt on its return travel underneath the bed of lats 905 and the cushion layer.

[0053] The second cross member 901 is constructed similarly to the first cross member 900 and the two cross members may be interchangeable.

[0054] The first and second side members 902, 903 are each provided with location points, in the formed of a drilled and tapped seat plates 915, 916 respectively, which can accept a pair of bolts which secure the side member 903 to the first frame cross member. By undoing the bolts, the frame section can be taken apart such that the first and second frame cross members, the first and second side members, and plurality of lats can all be separated. When assembled into a frame section, the bed of the platform comprising the first and second side members 902, 903, the plurality of lats 905, and the plurality of pads or plates 906 is supported by the first and second frame cross members, with the first and second side members 902, 903 seating in the substantially elongate "L" shaped profile of the seat plates 915, 916.

[0055] Each side member 902, 903 comprises a hollow tubular square shaped elongate member having a plurality of rectangular apertures along one side, into which the ends of the lats can be slid. This holds the lats in position, but the lats are permitted to slide with respect to the side members, so that as they bend and flex, the ends of the lats are permitted to move in a direction transverse to a main direction of the side members 902, 903, sliding in and out of the apertures. To reduce friction between the ends of the carbon fiber lats, and the perimeters of the apertures in the side members, the apertures may be provided with a plurality of plastics or nylon liner rings 916.

[0056] The bolts used to secure the seat plates 915, 916 may also be used to secure the brackets 612, 613 respectively on the feed roller section, in order to secure the frame section to the feed roller section. Similarly, the seat plates on the opposite end of the side members may be used to connect the frame section to the second end roller section, or if more than one frame section is used, to connect one frame section to another adjacent to frame section, using a pair of elongate drilled connecting plates.

[0057] The length of the platform may be adjusted in discreet units of one frame section length, by adding in one, two, or a higher number of frame sections.

[0058] In the embodiment shown, the endless belt has a width of around 250cm, and the axes of rotation of the first and second end rollers are positioned around 5.0 meters apart. Each frame section has a length of around 2.4 meters, and the platform can be extended in increments of around 2.0 meters by adding in further frame sections.

[0059] Referring to Figure 10 herein there is illustrated schematically the frame section of Figure 9, in view from one end.

[0060] In use, the endless belt passes through an aperture 1000 in the frame section, under the plurality of lats 905 in a return direction, and passes on top of the lats 905 and the cushion layer in a forward direction. The rubberized foam cushion layer is positioned between the pads 906 and the underside of the endless belt in use.

[0061] Referring to Figure 11 herein, there is illustrated schematically in perspective view an intermediate roller 202 which fits inside the mounting brackets 913, 914 of a frame section in order to support the endless belt on its return journey through the frame section.

[0062] The intermediate roller comprises a substantially cylindrical member 1100. At one end of the cylindrical member is provided a cylindrical axle bearing 1101. At a second end of the roller is provided a second axle bearing 1102.

[0063] At each end of the roller is provided a corresponding respective annular plate member 1103, 1104, which acts as a lateral guide to stop the endless belt moving side ways and chaffing against the other members of the frame section, and to keep the endless belt in line on its path of travel.

[0064] Referring to Figure 12 herein there is illustrated in perspective view from above and one side, the frame section of Figures 9 and 10 herein showing in detail the bed. Each lat is provided with a plurality of pads 906 slid onto the lats in a row, with their upper most flat plate like surfaces facing towards an underside of the impact absorbing cushion layer 304. The ends of the carbon fiber lats are inserted into apertures of the opposing first and second side members 902, 903 such that each lat is capable of movement and flexing independent of each other lat.

[0065] Each pad 906 can be slid a small distance in a direction along the length of each lat, and the pads are not connected to each other other than by the lat, so that any flexing of the lat is accommodated by longitudinal movement of the lat relative to individual pads on that lat.

[0066] In use, a person falling onto the endless belt, transmits the force of their fall through the belt, through the foam cushion layer, which absorbs impact on a small dimension scale, for example on the scale of the persons elbow or knee, whilst the resilience of the plurality of lats absorbs impacts on a larger scale, for example in dimensions in the range 20cm to 180cm, that is, on the scale of a complete human body falling on the platform.

[0067] The carbon fiber beams are flexible enough so as to bend from their normal static rest position by up to 20cm towards the floor. A combination of the cushion layer and the resilient lats allows a person to be cushioned from injurious impact when falling onto the endless belt. The foam cushion layer and carbon fiber rods/beams passed the FIG (Federation International Gymnastics) tests for safety and performance, and can accommodate impacts having a loading equivalent to around 1,000 kg.

[0068] Referring to Figure 13 herein, there is illustrated schematically in view from underneath, a single carbon fiber transverse lat 905, provided with a plurality of plastics support or cover pads 1301-1303.

[0069] Each elongate carbon fiber lat has a substantially rectangular cross sectional shape, with chamfered, or rounded edges. A plurality of support pads 1301 -1 303 are slid along the carbon fiber latto provide an extended upper surface to the lat which has a supporting area larger than the area of a surface of one side of the lat.

[0070] Each support pad member comprises a substantially planar, substantially rectangular sheet 1304 of plastics material, and a pair of plastics loops 1305, 1306 respectively forming a loop aperture of a substantially rectangular shape, so as to accept the substantially rectangular carbon fiber lat.

Each support member 1301 -1 303 also has a pair of upright side walls extending along a main length of the support member in a direction perpendicular to a main plane of the main sheet 1304. Strengthening the upright side walls and their connection to the plate member 1304 are a plurality of substantially triangular plate buttresses 1307. Preferably the support member is formed in a single molding operation, from a resilient tough plastics material.

[0071] By providing a plurality of support members slid along the length of the lat, allows for the lat to bend and flex, without cracking of any of the individual support members, which have freedom to slide along the length of the lat as the lat bends and flexes. Further, should any torsional twisting of the lat occur, because the length of the support members is relatively short compared to the overall length of the lat, the plurality of support members can accommodate a torsional twist in the lat, without breakage of any of the support members.

[0072] By making the lat out of carbon fiber and the support members from a durable lightweight plastics material, strength and resilience can be provided underneath the plafform, from lightweight materials.

[0073] Whilst the support members can accommodate torsional twisting of the lat, each support member is restricted in its twisting or rotation with respect to the lat, due to the substantially rectangular shape of the apertures within the loops of the support member, which corresponds with the cross sectional shape of the carbon fiber lat.

[0074] Referring to Figure 14 herein, there is illustrated in perspective view from one side a portion of the cushion layer which rests on top of the transverse lats, and underneath the endless belt. In this embodiment, the cushion layer has a five layer laminated construction comprising a first rubberized foam layer 1400, bonded to the first layer, a second rubberized foam layer 1401; bonded to an upper surface of the second rubberized layer, a third rubberized foam layer 1402; and bonded to an upper surface of the third foam layer, a fourth foam rubberized foam layer 1403. Bonded to an upper surface of the fourth foam layer is a polyester fiber carpet layer 1404, which provides a reduced friction surface over which the endless belt passes.

[0075] The five layers are bonded to each other using a known glue or by heat bonding. Each of the foam layers are formed from a corresponding respective sheet of rubberized foam material. The density of two of the layers are 120g, and the other two layers have a density of 90g.

[0076] The combined thickness of the foam layers and the carpet layer is preferably in the region of 30mm to 75mm, and in the embodiment shown, the total depth of the cushion is around 50mm. In the embodiment shown, the first layer has a depth in the range 12mm to 14mm, the second layer 1401 has a depth in the range 12mm to 14mm, the third layer 1402 has a depth in the range 10mm to 12mm and the fourth layer 1403 has a depth in the range 10mm to 12mm. Itwould be appreciated by the person skilled in the art that the depth or thickness or density of foam of each of the rubberized foam sheets can be varied in order to vary the amount of resilience or cushioning provided by the cushion layer.

[0077] Since the platform is sectional, it can be provided in different lengths, depending upon how many central platform sections are used. Each total platform length requires a different endless belt of the corresponding appropriate length to fit the length of the underlying platform structure and end rollers.

[0078] The combination of the springiness of the carbon fiber lats and the 50mm foam protection layer means that the platform is springy and resilient, whilst at the same time being supportive. The resilience and springiness of the platform means that a person falling over on the platform is cushioned from the fall, and less likely to incur injury.

[0079] The endless belt is preferably made of Poly Vinyl Chloride (PVC) and has a friction reducing backing similar to that used in known PVC conveyor belts used in the food industry.

[0080] The PVC endless belt can be provided in different external colors including black, white, red, green, yellow, or orange or any other suitable color as appropriate for the use of the platform.

[0081] The frictionless backing on the endless belt and the outer carpeted surface on top of the underlying frame of the platform help to reduce friction between the frame and the belt and enables easy transport of the endless belt over the frame, with a minimum amount of friction. Reducing friction between the frame and the endless belt also helps reduce power consumption and motor noise.

In the embodiments shown a coefficient of friction between the underside of the belt and the cushion layer n the range 0.2 to 0.3 has been achieved.

[0082] When the endless belt is stationary, the use of carbon fiber lats and foam protection layer means that the platform acts like a trampoline, absorbing the energy of a person jumping on the platform, and reflecting that energy to allow the person to rebound above the platform.

[0083] Referring to Figure 15 herein, there is illustrated schematically in perspective view from one side and above, a second end roller section 301. The second roller section comprises the non-driven second roller 201.

[0084] The second end roller section comprises a first side structure 1500 and a second side structure 1501. The first and second side structures are spaced apart by a cross member 1502 which also supports an upper surface of the assembly, onto which a sheet 1508 of the cushion layer 304 is laid.

[0085] The second side structure 1501 comprises a first upright member 1503; spaced apart from the first upright member 1503, a second upright member 1504, between the first and second upright members there being provided a plate member 1505 which holds a bearing into which the rotating second end roller 201 is fitted; on an opposite side of the first upright member 1503, is provided a second side structure 1506, to one end of which the cross member 1502 is fixed. The second side structure 1501 also comprises a cover plate 1507 covering the end of the axle of the second end roller 201.

[0086] The first side structure 1500 is constructed substantially as a mirror image of the second side structure 1501, with corresponding components.

[0087] In use, an upper surface of the second end roller section is covered with a section of foam layer 1508 to protect persons from impact against the section. At each end of the second roller 201 are provided curved side cushion portions 1509, 1510 respectively, covering the upper surfaces of the side structures.

[0088] In the embodiment shown, the upper surface between the cross member 1502, and the second end roll of 201 is formed of a metal plate, covered with an impact absorbing foam or rubberized cushion layer 1508. However in an alternative embodiment, the surface can be formed similarly as described herein with reference to a frame section, of a bed comprising a plurality of carbon fiber lat members extending across a width of the second end roller section, and having a plurality of pads as described herein before, such that a person falling near the end of the plafform, on the cushion section 1501 experiences a springy or resilient impact absorbing surface up to a position as close as possible to the second end roller 201.

[0089] Referring to Figure 16 herein, there is illustrated schematically in view from the front, the first end roller 200, mounted in part of the first end roller section.

[0090] The roller comprises a substantially cylindrical metal drum, covered with a rubberized material, suitable for gripping the underside of the endless belt and driving the belt across the plafforrn.

[0091] An electric motor is provided inside the drum, with electrical connections and controls to the motor being provided at an external control and connection box 1501 provided axially at one end of the drum. Suitable gearing is provided inside of the drum.

Installation, Removal and Storage [0092] The complete moving platform can be broken down for transportation and storage into the separate front end rollers and the feed roller sections, one or a plurality of platform sections, and the second end roller section.

[0093] The first end roller and feed roller section, and the second end roller section are each of the size and weight such that they can be picked up using a normal small forklift truck and loaded onto a flat bed lorry, or a ten tonner heavy goods vehicle. The platform sections are of a size and weight such that they can be stacked one on top of each other and a pair of such sections can be loaded onto a lorry using a forklift truck.

[0094] Similarly, the individual platform sections can be taken apart as herein before described, and the bed portion separated from the frame cross members, such that these individual components are each of a size and weight which can be lifted by a person and transported in a van or light goods vehicle.

[0095] As shown in Figure 3 herein, each of the first end roller section and second end roller section can be fitted with castor type wheels, for moving the first and second end roller sections over a hard surface, for example a car park or a concrete floor. When assembled, if the wheels are fitted, the whole platform is capable of being moved so as to position it at a location, either using the assistance of mechanical handling equipment such as a forklift truck, or by one or more persons pushing the assembled platform.

[0096] The endless belt may be transported in rolled up form as a single sheet or web or material. To assemble the endless belt to the first and second end roller sections and the platform sections, the belt may be fed through the platform sections underneath, over the feed roller 204, around the first end roller, and the second end of the belt material may be fed over the second end roller, so that the two belt ends can be connected together to form the endless belt, in situ during assembly of the platform.

[0097] To accommodate different lengths of platform using different numbers of platform sections, a plurality of different length webs may be provided, allowing flexibility of application of the moving platform for applications requiring different length platforms using the same set of components.

[0098] The following test data is for one example of the first end roller motorized drum.

General Data Pulley Type 400M Article Code 6GAMO1 Art. Cod. 0 Mot.

Shell Width [RI 1810 Serial Number 806578 Serialnr. 0 in mm] Mot.

Power [kW] 15 Oil Quantity [L] 92 Weight [kg] Speed [mIs] 6 Oil Type Mobil SHC 630 Voltage [SI] 415 Oil Level 0 Nom. Current [A] 28 Surface Lagging 8mm vollbelegt geklebt Rate [Is/If] 7,5 Electric motor efficiency 0 = 0,9 Readings of the electrical motor data at frequency inverter UN Pmech P1 IR Is l-Cos cp f MTR nTR eta Remarks 45 46 46 0$7 10 200 1,37 70dB 29 29 29 0$8 20 350 2,75 75dB 250 28 29 28 0$8 30 350 4,11 77dB 340 28 28 28 0M8 40 350 5,48 84dB 415 28 28 28 0,88 50 350 6,86 87dB 415 28 27 28 0,88 60 300 8,23 89dB [0100] A suitable motorized roller may have a specification as follows: A torque of 493.5 Nm at a speed of 4.27 mlsec.

A torque of 493.5 Nm ata speed of 6.15 m/sec.

Based on four persons at 85kg per person giving a load of 3335 N, of which is 371 N/rn.

A belt pull in the range 2000 N -3500 N is suitable for the rnoving plafforrn.

[0101] This can be provided with a 15 kW electric rnotor, giving a belt speed of up to 8 rneters per second. On a 415V 60 Hz rnotor, this can give an external noise in the range 70 dB to 85 dB.

[0102] Typically the friction factor between the belt and the cushion layer is 0.2 to 0.6 co-efficient of friction, and typically in the range 0.2 to 0.3 during operation.

[0103] The following are sorne calculations relating rnotor power and belt speeds at 1, 4, 6 and 7 rneters per second at different friction coefficients of 0.2 and 0.3 between the endless belt and the cushion layer.

Velocity (rnlsec) 7 Total load on belt (kg) 340 Lift(rn) 0 Belt weight (kg/rn) 25 Coefficient of friction (0.2 -0.6) 0.3 Calculation of Results Belt pull (N) 1829 Necessary Power (kW) 12.803 15% Security (kW) 14.723 Velocity (rn/sec) 1 Total load on belt (kg) 340 Lift(rn) 0 Belt weight (kg/rn) 25 Coefficient of friction (0.2 -0.6) 0.2 Calculation of Results Beltpull(N) 1219 Necessary Power (kW) 1.219 15% Security (kW) 1.401 Velocity (rnlsec) 4 Total load on belt (kg) 340 Lift(rn) 0 Belt weight (kg/rn) 25 Coefficient of friction (0.2 -0.6) 0.2 Calculation of Results Beltpull(N) 1219 Necessary Power (kW) 4.877 15% Security (kW) 5.608 Velocity (m/sec) 6 Total load on belt (kg) 340 Lift(rn) 0 Belt weight (kg/rn) 25 Coefficient of friction (0.2 -0.6) 0.2 Calculation of Results Beltpull(N) 1219 Necessary Power (kW) 7.316 15% Security (kW) 8.413 Velocity (rn/sec) 7 Total load on belt (kg) 340 Lift(rn) 0 Belt weight (kg/rn) 25 Coefficient of friction (0.2 -0.6) 0.2 Calculation of Results Beltpull(N) 1219 Necessary Power (kW) 8.535 15% Security (kW) 9.815 Velocity (rnlsec) 1 Total load on belt (kg) 340 Lift(rn) 0 Belt weight (kg/rn) 25 Coefficient of friction (0.2 -0.6) 0.3 Calculation of Results Belt pull (N) 1829 Necessary Power (kW) 1.829 15% Security (kW) 2.103 Velocity (m/sec) 4 Total load on belt (kg) 340 Lift(rn) 0 Belt weight (kg/rn) 25 Coefficient of friction (0.2 -0.6) 0.3 Calculation of Results Belt pull (N) 1829 Necessary Power (kW) 7.316 15% Security (kW) 8.413 Velocity (rn/sec) 6 Total load on belt (kg) 340 Lift(rn) 0 Belt weight (kg/rn) 25 Coefficient of friction (0.2 -0.6) 0.3 Calculation of Results Belt pull (N) 1829 Necessary Power (kW) 10.974 15% Security (kW) 12.62

Claims (18)

1. Claims 1. A moving platform apparatus comprising: a first end roller; a second end roller; an endless belt extending between said first and second end rollers; and a central section comprising a resilient platform, over which said endless belt passes.
2. 2. The moving platform apparatus as claimed in claim 1, wherein said resilient platform comprises a shock absorbing cushion layer.
3. 3. The moving platform apparatus as claimed in any one of the preceding claims, wherein said resilient platform comprises a rigid frame structure; and a flexible bed extending across said frame structure.
4. 4. The moving platform apparatus as claimed in claim 3, wherein said flexible bed comprises a plurality of flexible beams extending across a width of said frame structure.
5. 5. The moving platform apparatus as claimed in claim 4, wherein said flexible beams comprise carbon fiber beams.
6. 6. The moving platform apparatus as claimed in claim 3, 4 or 5, wherein said resilient bed comprises a plurality of plates, arranged in a substantially horizontal plane.
7. 7. The moving platform as claimed in claim 5, wherein said plurality of plates are arranged in rows across a width of said platform, such that each row of plates is capable of bending in response to a downward or upward force.
8. 8. The moving platform apparatus as claimed in claim 6 or 7, wherein said plurality of plates are arranged in a tiled lay out.
9. 9. The moving platform apparatus as claimed in any one of the preceding claims, wherein said resilient platform comprises a plurality of frame sections which can be rigidly connected together.
10. 10. The moving platform apparatus as claimed in any one of the preceding claims, comprising: a first end roller assembly containing said first end roller; a second end roller assembly containing said second end roller; and one or a plurality of frame sections arranged to fit between said first and second end roller sections.
11. 11. The moving platform apparatus as claimed in claim 7, wherein said first end roller assembly, said second end roller assembly and said one or a plurality of frame sections are releasably connectable to each other to allow assembly and disassembly of said moving platform.
12. 12. The moving platform apparatus as claimed in any one of the preceding claims, wherein said resilient platform is impact absorbing.
13. 13. The moving platform apparatus as claimed in any one of the preceding claims, wherein said resilient platform comprises an impact absorbing plastics and/or rubberized layer having a depth in the range 30mm to 80mm.
14. 14. The moving platform apparatus as claimed in any one of the preceding claims, wherein said resilient platform comprises an impact absorbing layer comprising: a first layer of plastics and/or rubberized impact absorbing material; and an external layer of material having a co-efficient or resistance lower than that of said plastics and/or rubberized layer.
15. 15. The moving platform apparatus as claimed in any one of the preceding claims, wherein said first end roller comprises a substantially cylindrical roller drum; and an electric motor positioned within said roller drum, to drive said roller drum.
16. 16. The moving platform apparatus as claimed in any one of the preceding claims, wherein said endless belt is driven by said first end roller at a speed in the range 0 meters per second to 8 meters per second.
17. 17. The moving platform apparatus as claimed in any one of the preceding claims, configured such that said endless belt is driven by said first end roller at a continuously variable speed in the range 0 meters per second to 8 meters per second.
18. 18. A moving platform apparatus comprising: a first end roller; a second end roller; an endless belt extending between said first and second end rollers; and a central section comprising a resilient platform, over which said endless belt passes; wherein said endless belt operates at a continuously variable speed in the range 0 meters per second to 8 meters per second.AMENDMENTS TO THE CLAIMS HAVE BEEN FILED AS FOLLOWS1. A moving platform apparatus comprising: a first end roller; a second end roller; an endless belt extending between said first and second end rollers; and a central section comprising a resilient platform, over which said endless belt passes wherein the resilient platform comprises a rigid frame structure and a * flexible bed extending across said rigid frame structure, and wherein the flexible bed includes a plurality of flexible carbon fiber beams extending across a width of said frame structure.2. The moving platform apparatus as claimed in claim 1, wherein said resilient platform comprises a shock absorbing cushion layer.0s*etI 3. The moving platform apparatus as claimed in claim 2, wherein said flexible bed includes a plurality of plates.-4. The moving, platform apparatus as claimed in any one of the preceding claims, wherein said resilient bed is arranged in a substantially horizontal plane.5. The moving platform as claimed in claim 3, wherein said plurality of plates are arranged in rows across a width of said platform, such that each row of plates is capable of bending in response to a downward or upward force.6. The moving platform apparatus as claimed in any one of claims 3 to 5, wherein said plurality of plates are arranged in a tiled lay out.7. The moving platform apparatus as claimed in any one of the preceding claims, wherein said resilient platform comprises a plurality of frame sections rigidly connected together.-8. The moving platform apparatus as claimed in any one of the preceding claims, comprising: a first end ro(ler assembly containing said first end roller; a second end roller assembly containing said second end roller; and t * 0.*. _*one or a plurality of frame sections arranged to fit between said first and second end roller sections.9. The moving platform apparatus as claimed in claim 8, wherein said first end roller assembly, said second end roller assembly and said one or a plurality of frame sections are releasably connectable to each other to allow assembly and disassembly of said moving platform.10. The moving platform apparatus as claimed in any one of the preceding claims, wherein said resilient platform is impact absorbing.11. The moving platform apparatus as claimed in any one of the preceding claims, wherein said resilient platform comprises an impact absorbing plastics and/or rubberized layer having a depth in the range 30mm to 80mm.12. The moving platform apparatus as claimed in any one of the preceding claims, wherein said resilient platform comprises an impact absorbing layer comprising: a first layer of plastics and/or rubberized impact absorbing material; and an external layer of material having a co-efficient or resistance lower than that of said plastics and/or rubberized layer.13. The moving platform apparatus as claimed in any one of the preceding claims, wherein said first end roller comprises a substantially cylindrical roller drum; andS * * S * *5an electric motor positioned within said roller drum, to drive said roller drum.* *, 15 14. The moving platform apparatus as claimed in any one of the preceding claims, wherein said endless belt is driven by said first end roller at a : .°. speed in the range 0 meters per second to 8 meters per second. 5*5 4S*5*55t -* * 15. The moving platform apparatus as claimed in any one of the preceding claims, configured such thai said endless belt is driven by said first end roller at a continuously variable speed in the range 0 meters per second to 8 meters per second.16. A moving platform apparatus, as claimed in any one of claims 3 to 16, wherein each one of said plates is mounted to one of said beams.17. A moving platform apparatus as claimed in claim 16, wherein the shock absorbing cushion layer is placed over said plates.