Abstract:
In order to prepare seat installation in a vehicle, a floor plate is prepared remotely and then inserted into the bottom of the vehicle. The floor plate ( 32 ) has an upper side with rail members ( 17 ) for mounting seats. The rail members ( 17 ) are separated by plate elements ( 3 ) forming the floor plate ( 32 ) together with the rail members ( 17 ). In order to ensure a proper stability of the floor plate before insertion into the car, a straight rigid profile ( 31 ) is provided at the ends of the floor plate ( 32 ).

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to floor plates in a vehicle, for example, a minibus, where the floor plate is assembled from a number of plate elements and rail members and mounted into the bottom of a vehicle. Especially, the invention relates to a method for mounting seats in a vehicle with a vehicle body and an interior space; the method comprising providing dimensions of a bottom of the interior space, assembling a floor plate according to these dimensions remote from the vehicle, inserting the assembled floor plate into the interior space, and fastening the assembled floor plate to the bottom; the floor plate having an upper side for mounting seats and an underside for abutting the bottom. 
         [0003]    2. Description of Related Art 
         [0004]    A variety of different floor plate assemblies are known in connection with mounting of seats in a vehicle. Such floor plates comprises parallel rail members for mounting seats in the rail members and a plurality of plate elements separating the rail members, which are glued or screwed to the vehicle bottom. The seats in the cabin and the rail members are adapted such that the seats may be secured to the rail members. The plate elements are usually plywood which is covered by a carpet or thin polymer covering, for example, vinyl. The plate elements are possibly interconnected below the rail members as an alternative to separating the rail members. The floor plate is fixed to the vehicle bottom for example, by gluing. The rail members may also be screwed or bolted to the vehicle bottom, which is often a corrugated metal plate. 
         [0005]    Floor plates may be mounted in a vehicle by inserting piece after piece onto the bottom of the vehicle. Alternatively, a floor plate may be assembled before inserting it into a vehicle. The latter eases production but has the difficult requirement of the entire plate being lifted into the vehicle without damaging the vehicle or the plate. 
         [0006]    European Patent Application EP1028885 discloses a first type of floor for a vehicle which is built up with reversed U-profiles with a plurality of recesses for receiving securing means for the seats. 
         [0007]    This floor of European Patent Application EP1028885 has an advantage of being flexible with respect to positioning of the seats. However, this type of floor lacks sufficient lateral stability in order to be suitable for assembly outside the vehicle and insertion into the vehicle as a pre-assembled floor plate. In addition, this floor, as illustrated in European Patent Application EP1028885, lack support under the floor in the regions of cut-outs, such as around the wheel housings, which is a great disadvantage. Thus, this floor is flexible with respect to mounting positions of the seat but does not have a high degree of stability, neither before nor after mounting. 
         [0008]    European Patent Application EP1028885 also discloses a second type of floor made of aluminum profiles interconnected alongside flanges to form a rigid plate. 
         [0009]    In this second type of floor of European Patent Application EP1028885, the distance between the mounting rails for the seats have a pre-defined distance, determined by the width of the extruded profiles between the rails. For each desired distance between the rails, special profiles have to be produced, because the profiles cannot be cut longitudinally to adjust the distance, as this would damage the necessary side flanges of the profiles. Thus, this floor has a high rigidity but lacks flexibility for adjustment of the distance between the rails. 
         [0010]    A structurally rather similar modular system as this second type of floor of European Patent Application EP1028885 is disclosed in International Patent Application Publication WO2006/048632 with similar disadvantages. 
         [0011]    Other modular floor plates for vehicles are disclosed in European Patent Applications EP0685380 and EP2641777 (which corresponds to U.S. Pat. No. 9,056,580), and German Patent Publication DE102012212305. 
         [0012]    Thus, there is still a need for improvement in the art. 
       SUMMARY OF THE INVENTION 
       [0013]    It is therefore the object of the invention to provide an improved floor plate for vehicles. Especially, it is an objective to provide a floor plate that, on the one hand, is rigid enough for being produced remote from the vehicle and inserted after assembly, and which, on the other hand, has a high degree of flexibility for adjusting the distance between the rails with the mounts for seats. 
         [0014]    This objective is achieved with a method for production of a floor plate and with a floor plate as explained in the following. 
         [0015]    The method relates to mounting seats in a vehicle, where the vehicle has a body with an interior space which has a bottom onto which a floor plate is to be provided. The term “an interior space” need not necessarily cover the entire internal space of a vehicle but will typically relate to that part of the vehicle behind the driver, where seats are arranged in rows for passengers, such as in a minibus. 
         [0016]    Before assembly of the floor plate, dimensions are provided of a bottom of the interior space. The term “bottom of the interior space” relates to that part of the bottom in which the floor plate with the rows of seats are to be provided for the passengers but need not necessarily include the bottom around the driver&#39;s seat. A skilled person in the art is aware of the differentiation between the interior space for the passengers behind the driver and the interior space for the driver and is aware about the corresponding bottoms in the vehicle. 
         [0017]    In a first embodiment, a floor plate according to these dimensions is assembled remote from the vehicle and subsequently inserted into the interior space and fastened to the bottom. Despite the fact that a floor plate before insertion into the vehicle has various orientations, especially during the assembly phase, it is nevertheless justified to use the terms “upper side” and “underside” for the floor plate, as these sides are well defined irrespectively of the orientation of the floor plate, because the upper side of the floor plate is used for mounting seats and the underside is configured for abutting the bottom when inserted into the vehicle. 
         [0018]    It is also mentioned that the bottom of the vehicle or part of the bottom of the vehicle, which is selected for seat mounting, in some embodiments is covered by a single floor plate. For minor vehicles, this is an advantageous option. However, for larger vehicles, two, three or four, or even more floor plates may be provided which in combination cover the bottom that is desired equipped with seats. 
         [0019]    The assembled floor plate comprises a plurality of plate elements and a plurality of parallel rail members. Advantageously, the plate elements are made of a different material, for example, plywood or polymer, than the rail members. Alternatives are composites plates including fibers, such as glass fibers or carbon fiber, sandwich plates with surfaces enforced by glass fibers or carbon fibers and an inside foam, The rail members, in turn, are typically provided as metal profiles, for example, extruded aluminum profiles, although it is possible, in principle, to provide such rail members as special hard polymer. Such special hard polymer would typically be relatively expensive, why the plate elements would reasonably be made of a different material, for example, plywood or a different, less costly polymer. 
         [0020]    The parallel rail members have connection means for fastening seats with their supports in the connection means. As already explained, this feature also defines the upper side of the floor plate. 
         [0021]    The assembly of the floor plate comprises the steps of assembling a plate structure from a plurality of plate elements and with at least one plate element between each two parallel rail members. For example, if there are only two rail members, a single plate elements with a specifically adapted width is sufficient to be provided to keep a desired distance between the rails, although it is possible to provide a plurality of plate elements between two parallel rails. 
         [0022]    For example, by providing the plate elements as plywood planks, the distance between the rails can easily be adjusted, as the plywood plank can be quickly and easily cut longitudinally at low cost to provide exactly the desired distance between the rails. This is a first important feature of the invention. 
         [0023]    For example, the plywood plank is then glued to the rails in order to provide a first solid connection. However, it is also possible, especially when using polymer plate elements, to provide the plate elements and the rail members with mutual tongue and groove connections or clamp connections that fasten the plate elements to the rail members. Such a connection makes the assembly faster. 
         [0024]    Once, a pair of rails has been assembled with one or more plate elements in between, further plate elements are provided on either side of the pair of rails. Often, a second pair of rails is provided parallel to the first pair of rails. Correspondingly, plate elements are provided not only between the rails in each pair of rails but also between the two or more pair of rails. 
         [0025]    The plate elements, advantageously, have a light weight despite a high stability and rigidity. For example, the thickness of the plate elements is less than 15 mm, less than 12 mm or less than 10 mm, for example, 8 to 10 mm or 9 mm. Typically, the plate elements are smooth and without holes and will be covered with a carpet material or a polymer sheet, such as vinyl. 
         [0026]    This may imply, however, that the height of the rail members is larger than the thickness of the plate elements. In order, on the one hand, to provide an equalisation of the height of plate elements relatively to the rail members, and on the other hand provide a good stability and support of the plate elements on the bottom of the vehicle, the following technical solution can be used as an option. In this case, support profiles are fastened to the plate elements on only one side the floor plate, which is the underside of the floor plate. The support profiled support the plate elements against the bottom. 
         [0027]    In some embodiments, in contrast to the above mentioned European Patent Application EP1028885, the support profiles are not abutting the rail members, but have a distance to the rail members, for example, of at least 2 cm, at least 5 cm, or at least 10 cm, or at least 15 cm, or at least 20 cm. 
         [0028]    The rail members and the plate elements are thus assembled into a plate structure, which is part of the final floor plate and a preliminary assembly state before finalising into the final floor plate. This plate structure has a first edge and a second edge extending in a perpendicular direction relatively to the parallel rail members and at opposite ends of the parallel rail members and plate elements. 
         [0029]    Typically, the rail members would be provided in the longitudinal direction of the vehicle with the edges being at the ends of a floor plate, although a transverse direction of the rails is, in principle, possible. The term “end” has to be understood in a broad term and does not necessarily mean that it is at the narrow edge of the floor plate, although often, the floor plate would have an elongate shape and the ends would actually be the narrow edges of the floor plate. 
         [0030]    In order to achieve a high mechanical rigidity of the floor plate against bending in a plane normal to the parallel rail members, the following assembly steps are performed before inserting the final floor plate into the interior space of the vehicle. A first straight, rigid profile of a length corresponding to the length of the first edge of the plate structure is fastened to and along this first edge, for example, at the first end of a rectangular plate structure. In order to even increase the rigidity, also a second straight, rigid profile may be provided of a length corresponding to the length of the second edge and fastened to and along the second edge. For example, the final floor plate is largely rectangular with rails along its longitude and with one or two straight, rigid profiles at its ends. 
         [0031]    The first and/or second straight, rigid profiles are conveniently fastened to the rail members or to the plate element or to both with fastening elements different from glue or in addition to glue. In case that there are provided support profiles under the plate elements, the first and/or second straight, rigid profiles may also be fastened to these with glue and/or fastening elements. For example, such fastening elements are screws or bolts, although also other possible fastening elements are possible, for example, rivets, clamps, or tongue and groove connections. 
         [0032]    Advantageously, the fastening elements are used to tightening the ends of the rail members close and solidly to the first straight rigid profile or to the second rigid profile or to both. This implies that identical rail members are fully aligned across the floor plate. This is important, as some of the rails of the rail members have corrugated slots for receiving correspondingly corrugated profiles, and the tolerances for the positioning of each two rail members relatively to each other is very small, typically in the order of mm in order for a seat to smoothly fin into the corrugated slots. The latter puts stringent demands on the construction of the floor plate. Especially in cases, where the floor plate is assembled inside the vehicle, problems arise with assembly within such narrow tolerances, especially due to the fact that the components may slide relatively to each other before the glue on the bottom is hardened sufficiently. The use of straight, rigid profiles to align the rail members is an easy means for solving this general problem. 
         [0033]    In some advantageous embodiments, the first straight, rigid profile has two parallel flanges extending from one side of the first straight and along the first rigid, straight profile. When mounted onto the edge of the plate structure, the first of the two flanges abuts the plate elements on the upper side of the floor plate and the second of the two flanges abuts the support profiles and/or the rail members on the underside of the floor plate. 
         [0034]    After assembly of the floor plate and transport of the floor plate to the vehicle, it is inserted into the vehicle. Typically, it is glued to the bottom and/or secured by screws or bolts through the bottom. Finally, seats are fastened with their supports in the connection means of the rail members. In order to make the vehicle more comfortable for the passengers, the plate elements can be covered with carpet or polymer sheeting, such as vinyl flooring. 
         [0035]    It is pointed out, specifically, that the production method has a further important advantage over prior art. Due to the use of plate elements that are fastened to the rail members, the plate elements can be provided with a surface cover, such as carpet or vinyl, before the assembly. In comparison, a system of modular extruded aluminum profiles, for example, as disclosed in European Patent Application EP1028885 can only be covered after the assembly due to the gluing of the side flanges of the profiles. However, as the carpet or vinyl, on the one hand, typically is fastened with double-sided gluing tape and, on the other hand, has to be pushed underneath an edge of the rail members, this is very difficult to achieve if the carpet or vinyl is mounted after the assembly. The invention enables this general problem to be solved in an easy manner. 
         [0036]    The further advantage arising from this fact is the possibility of providing the components of the floor plate as a not-yet-assembled assembly-kit with correctly dimensioned plate elements, for example, already equipped with carpet or vinyl, rail members, and optional support profiles, as well as straight, rigid profiles. According to an assembly plan delivered from the basic producer together with the assembly-kit, the floor plate, after transport to the point-of-use, can be easily assembled on site before being lifted into the car. Thus, one basic producer would receive the specifications for a floor and produce the components in an assembly-kit for transport in a relatively small and easy to transport box, whereas the receiver would then quickly be able to assemble the floor plate, before lifting it into a car. This model of separating production of components for the floor plate and assembly thereof provides greater flexibility than with most systems on the market and, therefore, has increased market potential and a potential for lower costs. 
         [0037]    For example, the method comprising receiving dimensional parameters for a specific vehicle bottom at a producer site, for example, for a minibus; providing components for a floor plate including a plurality of rail members and plate elements, as well as the first straight, rigid profile and, optionally also the second, straight, rigid profile. In addition, a plurality of support profiles is included. The next step is to shape the components according to the parameters in order to provide the floor plate, covering the specific vehicle bottom if assembled. For example, in order to cover the entire floor, if this is large, two, three or four, or even more floor plates are provided, including cut outs for wheel boxes, if present in the dimensional parameters. Once, the components are shapes appropriately, the components are packed as an assembly-kit into a box, and send to a receiver remote from the producer site for assembly before insertion into the specific vehicle. 
         [0038]    Especially in connection with transport of disabled in wheel chairs, an easy access to the upper side of the floor plate in the vehicle is necessary, for example, from the lift or platform behind the vehicle, such as a minibus. For this reason, in a further embodiment, a ramp profile is provided with a flat upper side and fastened to and along the first straight, rigid profile. Once, the floor plate is mounted in the vehicle, the ramp profile extends in an inclined angle from one the upper side of the floor plate downwards in order to provide a smooth inclined ramp to the upper side of the floor plate. 
         [0039]    In summary, in order to prepare seat installation in a vehicle, a floor is prepared remotely then inserted into the bottom of the vehicle. The floor plate has an upper with rail members for mounting seats. The rail members are separated by the plate elements forming the floor together with the rail members. In order to ensure a proper stability of the floor plate before insertion into the car, a straight rigid profile is provided at one end or two ends of the floor plate. 
         [0040]    The invention will be explained in more detail with reference to the accompanying drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0041]      FIGS. 1 a - c    illustrate some basic components of a floor plate, where a) is a figure of a part of a floor plate; b) is a figure of a support profile; c) is a figure of a rail member; 
           [0042]      FIGS. 2 a - b    illustrate a first rigid profile in a) cross section and b) on a cross sectional view when mounted to at least one end of a plate structure as part of a floor plate; 
           [0043]      FIGS. 3 a - c    are perspective views of a plate structure illustrating a) an entire plate structure with  4  pairs of rail members and b) an enlarged section which shows a corrugated slot; c) a further enlarged section showing a vinyl covering of the floor; 
           [0044]      FIGS. 4 a - b    shows a rail member with indicated exemplary dimensions in a) side view and b) top view; and 
           [0045]      FIGS. 5 a - b    shows a floor plate with a seat in a) overview perspective, b) enlarged ramp region. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0046]      FIG. 1 a    is a cross sectional schematic drawing illustrating some basic components for a floor plate including a plate structure  1  comprising two rail members  2  in between which a plate element  3  is provided. In order to support the plate element  3 , a support profile  4  is attached to the underside of the plate element  3 . 
         [0047]      FIG. 1 b    illustrates in greater detail a cross section of the support profile  4 . It is largely of rectangular cross section with an upper side  5 , sides  6  and an underside  7 . The upper side  5  is provided with a recess  8  for accommodating glue for fastening the support profile to the plate element. The recess is provided with a corrugated or otherwise rough surface. The underside  7  is provided with a corrugated surface  11  or otherwise rough surface in order to have an improved grip on the glue used for fastening the support profile as part of a floor plate to the bottom of the interior space of a vehicle. The support profile  4  is provided with two circular partly-open channels  9 , which are used as bushings for accommodating the threads of screws in a fastening manner. The channels  9  have a partly-open region  10  to the side of the partly-open channel  9  over an angular interval of 60 degrees in order not to brake when screws are screwed into the partly-open channels  9  but, on the other hand, to be sufficiently stable to let the threads of the screw be fastened in the channel. These partly-open channels  9  are used for fastening a straight, rigid profile as an end-profile to the plate structure  1 , therewith providing lateral stability to the floor plate  32 , which will be explained in greater detail below. In order to increase the grip, the partly-open channels  9  are provided with a plurality of ribs  39 . 
         [0048]      FIG. 1 c    shows the rail member  2  is greater detail. The rail member  2  has an underside  12  provided with a corrugated surface  13  or otherwise rough surface in order to have an improved grip on the glue used for fastening the rail member  2  as part of a floor plate to the bottom of the interior space of a vehicle. Between the sides  14  of the rail member  2 , three chambers are provided, a central chamber  15  and two side chambers  16 , each chamber having a partly-open channel  9  for accommodating the winding of a screw. On the upper side, the rail member is provided with a two parallel rails  17  with a substantially flat upper surface  18  and forming an elongated slot  19  there in between. 
         [0049]    Each rail  17  comprises a flange  20  that extends in a direction laterally away from the slot  19 . Each of these two flanges  20  are part of a groove  21  formed largely by the upper side  22  of a side chamber  15  the outer side of the rail  17  and the flanges  20  that extend laterally from the rail  17 . This groove is used for accommodating the plate element, as seen in  FIG. 1 a   . Inside the groove  21 , an end stop  23  is provided for the plate, defining the depth into which the edge region  24  (see  FIG. 1 a   ) of a properly dimensioned plate element  3  can be pushed under normal circumstances. Further, an upper protrusion  25  is provided, the protrusion  25  pointing downwards from the lateral flange  17  and defines thereby a distance between the protrusion  26  and the upper side of the side chamber  17 ; this distance corresponds to the thickness of the plate element that fits best into the groove  21  for stable conditions. The side chambers  16  are each provided with a recess  27  on their upper side  22  for accommodating glue for fastening the plate element  3  to the upper side  22  of the side chamber  16 . The recess  27  in the side chambers and/or the recess  8  in the support profile are also provided with a corrugated or otherwise rough surface. Such recesses yield a larger surface area resulting in better attachment strength with the glue. However, these recesses could be smooth, alternatively. In order to increase the grip, the partly-open channels  9  are provided with a plurality of ribs  39 . 
         [0050]    When a properly dimensioned plate element  3  is provided in the groove  21 , as illustrated in  FIG. 1   a,  a further hollow  26 , extending from the end stop  23  to the protrusion  25  around the edge  24  of the plate element  3 , is used for accommodating glue around the edge  24  of the plate element  3 . 
         [0051]    Between the two rails  17 , below the slot  19 , a cavity  28  is provided with access to the cavity  28  from above through the slot  19 , which is narrower than the cavity  28 . Different types of fasteners can be used in connection with such cavity in order to fasten seats rail member  2 . For example, a bar with threaded screw holes can be used inside the cavity for fastening of seat supports, if the seat supports are provided with bolts to be screwed into the threaded screw holes. Fastening the screws or bolts would urge the bar towards the underside of the rails  17  inside the cavity. Alternatively, a bar with a number of bolts extending from the bar can be inserted into the cavity to cooperate with corresponding screw holes and nuts. The advantage of such systems is that loosening of the screws/bolts allows a seat support, while still loosely fastened to the bar, to be freely pushed along the rail  17  and then finally tightly fastened to the rails  17  by tightening the screws that extend into the cavity  28 . The cavity  28  is shown as rhombic but could have other shapes, for example, rectangular or oval. 
         [0052]    Alternatively, inserts can be inserted into the cavity, the inserts having a shape that is largely as an inverted T fitting into the cavity. Examples are shown in the above mentioned European Patent Application EP1028885. A further alternative is a dovetail insert, where two dove tail parts as forces apart and toward the sides of the slot  19 , for example, as illustrated in European Patent Application EP1034969. 
         [0053]    An alternative possibility for fastening is illustrated in  FIG. 3 b   , where the rails  17  are provided with corrugations  29  such that the slot  19  repeatedly alternates between narrow and wide areas. This allow insertion of an insert through the wide part of the slot  19  and prevents escaping of the insert from the cavity  28  if the insert is pushed half a period of the corrugations  29  and then fastened, for example, if the insert has a shape largely of an inverted T. This is helpful for quick fastening and release of a chair. The latter is desired in case that high flexibility is desired with respect to moving of seats in a vehicle, especially when the vehicle is periodically being used for transport of wheel chairs, for which the ordinary seats have to be removed or displaced. 
         [0054]    Different cross sectional shapes can be used for the cavity and the inserts, where the main principle is a cavity  28  with a narrowing slot  19  for withholding an insert having dimensions fitting into the cavity  28  but larger than smallest width of the slot  19 . 
         [0055]    Once a plurality of rail members  2 , plate elements  3  and support profiles  4  have been cut into the correct dimensions according to the desired shape for the bottom of the vehicle, and the components as shown in  FIG. 1  have been assembled into a plate structure  1  as shown in  FIG. 3 a   , for example, there is still a need for providing structural stability if the final floor plate has to be lifted into the vehicle. 
         [0056]    For this reason, the edges  30   a,    30   b  at the two ends of the plate structure  1  with the rail members  2  and support profiles  4  and the plate elements  3  are provided with a stabilizing straight, rigid profile  31 . This is illustrated in  FIG. 2 b   , which is a side view of the floor plate  32  comprising the plate structure and the straight, rigid profiles  31  with a viewing direction perpendicular to the rails  17 . 
         [0057]      FIG. 2 a    shows an enlarged cross section of the straight, rigid profile  31 . The straight, rigid profile comprises two flanges  33 ,  34  (an upper flange and a lower flange) extending on one side so as to form a concavity as a horizontal U-shape. The distance between the flanges  33 ,  34  corresponds to the height of the plate structure  1 , for example, 10 to 20 mm, or 20 to 40 mm, or 25 to 35 mm, or 40-60 mm, or 60-80 mm. The first, upper flange  33  of the two flanges abuts the plate elements  3  on the upper side of the plate structure  1  and the second, lower flange  34  abuts the underside  7  of the support profiles  4  and the underside  12  of the rail members  2 . The straight, rigid profile  31  further comprises an inclined flange  35  onto which a ramp profile can be mounted with a flat upper side. Such ramp profile along the straight, rigid profile  31  extends in an inclined angle from the upper side of the floor plate for providing a smooth inclined ramp in the vehicle to the upper side of the floor plate. 
         [0058]    In  FIG. 3 b   , it is shown that the rails  17  are shorter than the rail member  2  itself in order for the straight, rigid profile  31  to extend across the rail members  31  and to abut the plate elements  3  on the upper side  37  of the plate structure  1 . 
         [0059]    The plate element  3  is covered with a cover material  38 , typically a carpet/textile or polymer sheet, such as vinyl. This is illustrated in greater detail on  FIG. 3 c   , showing a part of the rail member  17  and the plate elements  3  on either side of the rail member  17 . As shown, the protrusion  25 , which forms part of the groove for the plate element  3  functions as an end stop for the cover material  38 . During the assembly phase, the plate elements  3 , optionally, are already provided with such cover material  38 . This eases assembly as compared to covering the floor plate with the cover material after assembly, especially when tapes with glue on both sides are used for the mounting of the cover material, because such tapes makes it difficult to push such carpets under the lateral side flange  20  against the end stop  25 . Similar problems exist on other prior art systems, for example, the system of European Patent Application EP1028885, such that the invention with the covering of the plate elements before assembly solves a further general problem. Especially, in the case of the floor plate being delivered to a customer for point-of-use assembly, such pre-covering of the plate elements  3  before assembly is a great advantage. 
         [0060]    For sake of illustration, it is pointed out that the embodiment in  FIG. 3 c    differs slightly from the embodiment of  FIG. 1  in that the recesses  27  in the side chambers  16  do not have a corrugated or rough surface, but are smooth, and the partly open channels  9  are not provided with internal ribs. 
         [0061]    For example, the plate element  3  is a plywood plank or a polymer plank that has been cut into the correct width according to specific demands for distances between the rail members. 
         [0062]    As illustrated, the sides of two parallel rail members  2  that are facing each other are not abutting each other but have a space in between, for example, of at least 2 cm or at least 5 cm, or more. 
         [0063]      FIG. 4 a    shows a rail member  2  in side view, and  FIG. 4 b    in top view. 
         [0064]      FIG. 5 a    shows a floor plate  32  with a seat  40  in an overview perspective. Details of the ramp profile  42  are shown in an enlarged view in  FIG. 5 b   . The ramp profile  42  comprises an inclined ramp section  42   a,  which is fastened to the inclined section  35  of the straight, rigid profile  31 . A flat ramp section  42   b  is configured to find support on the bottom of the vehicle space. 
         [0065]    The invention also concerns a vehicle with a floor plate as described herewith in addition to the use of such a floor plate for a minibus. 
         [0066]    As noted above, assembly of the floor plate comprises the steps of assembling a plate structure from a plurality of plate elements and with at least one plate element between each two parallel rail members. For example, if there are only two rail members, a single plate element with a specifically adapted width is sufficient to be provided to keep a desired distance between the rails, although it is possible to provide a plurality of plate elements between two parallel rails. 
         [0067]    For example, by providing the plate elements as plywood planks, the distance between the rails can easily be adjusted, as the plywood plank can be quickly and easily cut longitudinally at low cost to provide exactly the desired distance between the rails. This is a first important feature of the invention. 
         [0068]    For example, the plywood plank is then glued to the rails in order to provide a first solid connection. However, it is also possible, especially when using polymer plate elements, to provide the plate elements and the rail members with mutual tongue and groove connections or clamp connections that fasten the plate elements to the rail members. Such a connection makes the assembly faster. 
         [0069]    Once, a pair of rails has been assembled with one or more plate elements in between, further plate elements are provided on either side of the pair of rails. Often, a second pair of rails is provided parallel to the first pair of rails. Correspondingly, plate elements are provided not only between the rails in each pair of rails but also between the two or more pair of rails. 
         [0070]    The method of the invention has the advantages summarized in the Background above. 
       REFERENCE NUMBER LIST 
       [0000]    
       
           1  plate structure 
           2  rail member 
           3  plate element 
           4  support profile 
           5  upper side of support profile  4   
           6  side of support profile  4   
           7  underside of support profile  4   
           8  recess in upper side  5  of support profile  4   
           9  channels for screws in rail member  2  or support profile  4   
           10  partly open region of channel  9   
           11  corrugated surface of underside  7  of support profile  4   
           12  underside of rail member  2   
           13  corrugated surface of underside  12  of rail member  2   
           14  sides of rail member  2   
           15  central chamber of rail member  2   
           16  side chamber of rail member  2   
           17  rails of rail member  2   
           18  upper flat surface of rail  17   
           19  slot between rails  17   
           20  lateral flange of rail  17   
           21  groove at rail  17  for plate element  3   
           22  upper side of side chamber  16   
           23  end stop in groove  21   
           24  edge region of plate element  3   
           25  protrusion on lateral flange  20   
           26  hollow around edge of plate element  3  in groove  21   
           27  recess in upper side  22  of side chamber  16   
           28  cavity in the rail member  2  between the two rails  17  and below the slot  19   
           29  corrugations of rail  17   
           30   a,    30   b  edges of plate structure  1   
           31  straight, rigid profile for edges  30   a,    30   b    
           32  floor plate including plate structure  1  and straight rigid profile  31   
           33  upper flange of straight, rigid profile  31   
           34  lower flange of straight, rigid profile  31   
           35  inclined flange of straight, rigid profile  31   
           36  underside of plate structure  1   
           37  upper side of plate structure  1   
           38  cover material on top plate element  3   
           39  ribs in partly-open channel  9   
           40  seat 
           41  seat support 
           42  ramp profile 
           42   a  inclined ramp section 
           42   b  flat ramp section.