Vehicle body, in particular of a refrigerated vehicle, refrigerated vehicle with such a vehicle body and method for manufacturing an insulating floor

Abstract

Vehicle body (10), in particular of a refrigerated vehicle, with an insulated floor (11) comprising at least one lower cover layer (12) and at least one upper loading floor element (13), in particular at least one wooden panel, arranged opposite the lower cover layer (12), wherein a gap (14) formed between the lower cover layer (12) and the upper loading floor element (13) is filled by a thermally insulating foam material, wherein the lower cover layer (12) is a profiled molded part (12') formed from at least one plastic film (15) and fiber-reinforced, in particular glass fiber-reinforced, plastic material pressed together with the plastic film (15), wherein the lower cover layer (12) has at least one bulge (22) extending in a direction away from the gap (14), in particular downwards, characterized in thatthat the insulating floor (11) has an increased insulation thickness in the area of ​​the bulge (22).

Description

[0001] The invention relates to a vehicle body, in particular a refrigerated vehicle, a vehicle with such a vehicle body, and a method for manufacturing an insulated floor. A vehicle body according to the preamble of claim 1 is known, for example, from EP 3 090 926 A1.

[0002] Refrigerated vehicles are equipped with thermally insulated bodies to transport temperature-sensitive goods, and especially perishable foodstuffs, at a constant temperature throughout the supply chain from producer to processor to retailer. These bodies are often constructed from insulated panels with fiber-reinforced plastic facings. The insulated panels are frequently used for the front wall, side walls, and roof of the body to reduce its weight and improve insulation. Such insulated panels are known, for example, from WO 99 / 50 060 A1, which originates from the applicant.

[0003] Thermally insulated vehicle bodies place particularly high demands on the insulated floor. On the one hand, it must have a high load-bearing capacity to withstand the stresses of the cargo, and on the other hand, it must have correspondingly good insulating properties to reduce heat loss and thus the energy required to cool the cargo space.

[0004] To achieve this, insulated floors, such as those known from the aforementioned EP 3 090 926 A1, were developed. These floors have a foam core layer with a metal layer facing the chassis and a layer of metal or wood-based material facing the cargo area. A disadvantage of such insulated floors is their high weight.

[0005] Furthermore, insulated floors are known from the prior art which, instead of the metal layer facing the chassis, have a wood layer with a plastic covering layer. Such insulated floors have the disadvantage that the combined wood / plastic layer results in an increased overall layer thickness, thus reducing the thickness of the foam core layer of the insulated floor. This has a detrimental effect on the insulating properties of the floor.

[0006] Furthermore, insulating panels suitable for use in insulated floors of vehicle bodies are known from DE 10 2018 129 606 B4 and DE 10 2019 101 029 B4. The insulating panels described therein have two opposing plastic outer layers covering a foam core located between them. The plastic outer layers consist of a fiber-reinforced plastic material.

[0007] The invention is based on the objective of providing an improved vehicle body that has reduced weight and improved insulation properties. Furthermore, the invention is based on the objective of providing a refrigerated vehicle and a manufacturing method for an insulated floor.

[0008] According to the invention, this problem is solved with regard to the vehicle body by the subject matter of claim 1. With regard to the refrigerated vehicle, the aforementioned problem is solved by the subject matter of claim 9.

[0009] Specifically, the problem is solved by a vehicle body, in particular a refrigerated vehicle, with an insulated floor comprising at least one lower surface layer and at least one upper loading floor element, in particular at least one wooden panel, arranged opposite the lower surface layer. A cavity between the lower surface layer and the upper loading floor element is filled with a thermally insulating foam material. The lower surface layer is a profiled molded part made of at least one plastic film and fiber-reinforced, in particular glass fiber-reinforced, plastic material pressed together with the plastic film.

[0010] The design of the lower cover layer as a profiled, fiber-reinforced molded part makes it possible to increase or decrease the insulation thickness of the insulated floor at specific points along the cover layer. This allows, in particular, for improved adaptation of the lower cover layer, and thus of the insulated floor, to a chassis on which the vehicle body is to be mounted.

[0011] For example, the profile of the molded part can include indentations designed to at least partially accommodate chassis components, particularly wheels. This increases the functionality of the insulated floor, as the lower surface layer not only serves to cover the floor but also to accommodate chassis components or, for example, a kingpin assembly for coupling to a towing vehicle. Additionally or alternatively, the profile of the molded part can include bulges, resulting in an increased insulation thickness of the floor. The insulated floor, and consequently the vehicle body, thus exhibits improved insulation properties.

[0012] A particular advantage of the invention results from the design of the lower cover layer as a press-fit composite between the at least one plastic film and the fiber-reinforced plastic material. This allows for the simple production of the profile of the lower cover layer. The profile is an integral part of the molded part. Additional production steps for the profile are therefore eliminated. In other words, the lower cover layer is designed as a single-piece or one-piece profiled molded part. This saves time and costs during production. Furthermore, this protects the foam material filling the cavity from direct external influences such as dirt and moisture. The lower cover layer is preferably closed.

[0013] Compared to the vehicle body described in the aforementioned EP 3 090 926 A1, the invention has the advantage that the lower cover layer of the insulating floor is not made of metal, but of the fiber-reinforced plastic molded part. This significantly reduces the weight of the insulating floor, while at least maintaining the required stability and load-bearing capacity.

[0014] Preferably, the lower cover layer is a largely flat molded part. The molded part is preferably a separate component. Preferably, the molded part is prefabricated. The lower cover layer is preferably thin-walled. Preferably, the lower cover layer has a thickness of 2 mm to 5 mm, particularly 2.5 mm to 4 mm. Most preferably, the lower cover layer has a thickness of 3 mm. The thickness may have a tolerance of approximately ±0.5 mm. Preferably, the lower cover layer has a uniform thickness. The thickness may be increased in the area of ​​an edge on the longitudinal sides of the lower cover layer compared to the thickness of a central area of ​​the lower cover layer.

[0015] Preferably, the upper loading floor element is a wooden panel, in particular a plywood panel. Preferably, the upper loading floor element has a thickness of 15 mm to 20 mm, in particular 18 mm.

[0016] The plastic film is preferably made of polyurethane. The fiber-reinforced plastic material preferably consists of fibers, particularly glass fibers, wetted with polyurethane. A pressing and curing process forms the profiled molded part from the plastic film and the fiber-reinforced plastic material. The fibers are preferably fiber mats or strips, particularly glass fiber mats or strips. Preferably, the molded part, i.e., the lower cover layer, is glass fiber reinforced. In other words, the lower cover layer is a fiber-reinforced plastic molded part. It is conceivable that the molded part is alternatively or additionally reinforced with carbon fiber.

[0017] The foam material filling the cavity forms a thermally insulating core layer of the insulating floor. The core layer is preferably solid, particularly hardened. Preferably, the cavity is completely filled with the thermally insulating foam material. Additionally, the foam material preferably completely covers the profile of the molded part. In other words, the foam material completely fills and / or completely surrounds the profile of the molded part. The insulating floor is generally constructed using a sandwich design.

[0018] Preferred embodiments of the invention are specified in the dependent claims.

[0019] In a preferred embodiment, the lower cover layer extends over the entire area of ​​the insulated floor. In other words, the lower cover layer completely covers the underside of the insulated floor. The molded part is preferably continuous, i.e., seamless. The advantage here is that the lower cover layer seals and thus protects the insulated floor from the external environment.

[0020] The lower cover layer preferably forms the bottom edge of the insulated floor. In other words, the lower cover layer preferably forms an underlayment layer of the insulated floor. The plastic film of the lower cover layer faces outwards. In other words, when the vehicle body is assembled, the lower cover layer faces the chassis. The insulated floor can then rest directly on the chassis with the lower cover layer. It is possible that the insulated floor includes at least one support element to protect the lower cover layer and / or the foamed material.

[0021] According to the invention, the lower cover layer has at least one protrusion extending in a direction away from the gap, in particular downwards. In other words, the lower cover layer has at least one protrusion extending from an outer surface of the lower cover layer away from the center of the insulating floor. The outer surface of the lower cover layer faces away from the upper loading floor element.

[0022] The bulge preferably forms a depression on the inner side of the lower cover layer to increase the insulation thickness of the insulated floor. The inner side of the lower cover layer faces the upper loading floor element. According to the invention, the insulated floor has increased insulation thickness in the area of ​​the bulge. The bulge thus increases the thickness of the foamed core layer. The bulge is preferably completely filled with the foam material. Due to the bulge in the lower cover layer, the insulated floor has improved insulating properties, thereby reducing the energy required for cooling the cargo area.

[0023] The bulge can have a depth of 20 mm to 150 mm, in particular 20 mm to 120 mm, and especially 20 mm to 80 mm. The bulge preferably has a depth of at least 40 mm. The depth refers to the inside, in particular an inner surface, of the lower cover layer.

[0024] The bulge can have an area of ​​10 percent to 50 percent, particularly 20 percent to 40 percent, of the floor area of ​​the insulating floor. Preferably, the bulge has an area of ​​25 percent to 35 percent of the floor area of ​​the insulating floor. Most preferably, the bulge has an area of ​​approximately 33 percent, i.e., one-third, of the floor area of ​​the insulating floor. This significantly increases the insulation thickness of the insulating floor and thus improves its insulating effect.

[0025] The bulge preferably forms a trough-shaped area of ​​the lower cover layer, extending longitudinally along the vehicle body. The trough-shaped area is preferably a depression in the lower cover layer. It is preferably formed on an inner side of the lower cover layer and is positioned opposite the upper loading floor element. The trough-shaped area is filled with foam material, resulting in increased insulation thickness of the foam core layer compared to the area outside the bulge.

[0026] In a preferred embodiment, the lower cover layer has at least one indentation extending into the gap. The indentation thus narrows the gap. The indentation and the bulge are formed in opposite directions. The indentation reduces the volume of the gap, and the bulge increases the volume of the gap. The indentation and / or the bulge are examples of a profile of the molded part. The indentation allows for the integration of external components, such as a wheel or wheel arch of a chassis, or other chassis components. This saves space.

[0027] Preferably, the lower cover layer has at least one first indentation for accommodating a kingpin assembly and / or several second indentations that form part of a wheel arch. This has the advantage of increasing the functionality of the insulated floor. Since the lower cover layer is continuous, additional components, for example for accommodating the kingpin assembly or for forming a wheel arch cut-off, can be omitted. This reduces costs and saves space.

[0028] In a preferred embodiment, the lower cover layer has an edge on each of its longitudinal sides that is angled upwards to engage a side wall of the vehicle body. In other words, the lower cover layer has a recess on its longitudinal sides into which a side wall of the vehicle body fits. The edge forms a lateral ridge on the longitudinal sides of the lower cover layer. This has the advantage that, on the one hand, the assembly or connection of the side walls to the insulated floor is simplified, and on the other hand, the seal at the connection point is improved. Furthermore, this reduces heat loss.

[0029] In one embodiment, the lower cover layer is formed with a flat, flush edge along its longitudinal sides. In other words, in this embodiment, the lower cover layer is straight along its longitudinal sides, i.e., free of an angled edge.

[0030] The insulated floor preferably comprises several crossbeams, in particular I-beams, arranged in the cavity, and at least two longitudinal beams that laterally define the cavity. The crossbeams and / or longitudinal beams preferably rest directly against the lower surface layer and / or the upper loading floor element. The lower surface layer, the crossbeams, the longitudinal beams, and the upper loading floor element form the structure of the insulated floor. The crossbeams and / or longitudinal beams are preferably permanently connected to the inner surface of the lower surface layer and an inner surface of the upper loading floor element. Preferably, the crossbeams and / or longitudinal beams are bonded to the lower surface layer and / or the upper loading floor element by a material bond. Additionally or alternatively, the crossbeams and / or longitudinal beams can be positively connected to the lower surface layer and / or the upper loading floor element.The simple construction of the insulated floor is an advantage here, as the combination of the supports, the lower top layer and the upper loading floor element creates a particularly stable structure.

[0031] Preferably, the transverse and / or longitudinal beams are bonded to the lower cover layer and / or to the upper loading floor element. Specifically, the transverse and / or longitudinal beams are preferably bonded to the inside of the lower cover layer. Additionally or alternatively, the transverse and / or longitudinal beams can be mechanically fastened to the lower cover layer and / or to the upper loading floor element. The inside of the lower cover layer is formed as a flat surface, at least in some sections. The transverse and / or longitudinal beams are preferably made of fiber-reinforced, in particular glass fiber-reinforced, plastic. Alternatively, the longitudinal beams can be made of a glass fiber-free plastic. The insulated floor can be manufactured simply and cost-effectively using the adhesive bonds between the transverse and longitudinal beams. No additional screws or similar fasteners are required to secure the beams.

[0032] The invention can additionally relate to a lower cover layer of an insulated floor of a refrigerated vehicle body, which is a profiled molded part formed from a plastic film and fiber-reinforced, in particular glass fiber-reinforced, plastic material pressed with the plastic film, wherein the profiled molded part has at least one bulge to increase the insulation thickness and / or at least one indentation to accommodate chassis components, which are formed in the opposite direction with respect to a reference surface, in particular the inner surface of the cover layer.

[0033] In the production of the lower cover layer, the plastic film is preferably placed into a recess of a mold. The mold forms the negative shape of the lower cover layer to be produced. The mold includes a negative profile for forming the profiled part. In a first process step, the plastic film is preferably drawn against an inner contour of the recess so that the plastic film lies flat against the contour without creases. A layer of fibers, in particular a layer of glass fibers, is preferably placed on the plastic film and wetted with the liquid plastic material to impregnate the fiber layer with the liquid plastic material, in particular polyurethane. Subsequently, a pressing element of a pressing device presses the wetted fiber layer, in particular the glass fiber layer, onto the plastic film.The pressed part preferably exerts pressure until a predetermined curing time is reached for the liquid plastic material to harden. The pressed part is then released. The finished fiber-reinforced molded part is removed from the mold and can be used to form the insulating base. The fiber-reinforced molded part forms the bottom cover layer. This bottom cover layer is dimensionally stable and has a profile.

[0034] In a secondary aspect, the invention relates to a refrigerated vehicle with at least one vehicle body of the type described above.

[0035] The application describes a method for manufacturing an insulating floor for a vehicle body according to the invention, wherein the insulating floor comprises at least one lower cover layer, at least one upper loading floor element, several cross members, and at least two longitudinal members. In the method, at least one plastic film and a fiber-reinforced, in particular glass fiber-reinforced, plastic material are pressed together to form a profiled molded part, the molded part forming the lower cover layer. The plastic material is preferably polyurethane. Additionally or alternatively, the plastic film preferably consists of polyurethane.

[0036] The crossbeams and longitudinal beams are then attached to the inside of the lower deck layer. This can be done by adhesive bonding. The upper loading floor element is attached to the crossbeams and / or longitudinal beams. This can also be done by adhesive bonding. Additionally, the crossbeams and / or longitudinal beams can be positively bonded to the inside of the lower deck layer and / or to the upper loading floor element. Alternatively, or in addition, the crossbeams and / or longitudinal beams can be mechanically fastened to the inside of the lower deck layer and / or to the upper loading floor element. Attaching the loading floor element creates at least one gap between the lower deck layer and the loading floor element. This gap is then filled with a self-expanding liquid foam material to form a thermally insulating foam core layer.The fully formed thermally insulating foam core layer is preferably solid, particularly cured. The liquid material to be introduced is preferably a liquid plastic. The liquid plastic can be fiber-reinforced, particularly glass fiber-reinforced. This can also provide additional mechanically stabilizing properties.

[0037] With regard to the refrigerated vehicle and the manufacturing process, reference is made to the advantages explained in connection with the vehicle body. Furthermore, the refrigerated vehicle or the manufacturing process may alternatively or additionally exhibit one or a combination of several of the features previously mentioned in relation to the vehicle body.

[0038] The invention is explained in more detail below with reference to the accompanying drawings. The illustrated embodiments represent examples of how the vehicle body according to the invention can be designed.

[0039] These show, Fig. 1 a perspective view of a vehicle body according to an embodiment according to the invention; Fig. 2 a detailed view in the area of ​​a corner of the vehicle body Fig. 1; Fig. 3 a perspective view of a lower cover layer of the vehicle body according to Fig. 1; Fig. 4 a perspective view of a lower cover layer of a vehicle body according to a further vehicle body according to the invention; Fig. 5 a perspective view of an insulating floor of the vehicle body according to Fig. 4, wherein a loading floor element arranged opposite the lower cover layer is hidden; and Fig. 6 another perspective view of the insulating floor according to Fig. 5.

[0040] Fig. Figures 1 to 3 show a vehicle body 10 according to a preferred embodiment according to the invention. Fig. Figures 4 to 6 show a vehicle body 10 according to a further embodiment of the invention. The vehicle bodies 10 are each thermally insulated box bodies. Preferably, the vehicle bodies 10 are used as refrigerated vehicle bodies for transporting chilled and frozen goods. The vehicle bodies 10 are also suitable for transporting moisture-sensitive goods, i.e., for dry transport of goods. Further applications for the vehicle bodies 10 are possible.

[0041] The vehicle body 10 has according to Fig. 1. An insulated floor 11, two side walls 26, a roof (not visible), a front wall, and a rear wall, which preferably includes a loading portal. The side walls 26, the roof, and the front wall are designed as insulated panels, preferably consisting of a thermally insulating core layer, in particular a foam core layer, and two fiber-reinforced, glass-fiber-reinforced, plastic layers arranged on the core layer. The fiber-reinforced plastic layers are arranged opposite each other on the core layer. The insulated panels are thus designed in a sandwich construction.

[0042] The insulating floor 11 is, as in Fig. 2, also constructed using sandwich construction. The insulated floor 11 has a lower deck layer 12, an upper loading floor element 13, and an intermediate space 14.

[0043] It should be noted here that the vehicle bodies 10 of the two embodiments according to the invention differ only in the design of the lower cover layer 12. All other features of the vehicle bodies 10 according to Fig. 1 to 3 and according to Fig. Numbers 4 to 6 are identical.

[0044] The cavity 14 of the insulated floor 11 is filled with a thermally insulating foam material. The lower cover layer 12 and the upper loading floor element 13 are arranged opposite each other, with the foam material in between. Specifically, the cavity 14 is filled with a thermally insulating plastic material, forming a foam core layer. The plastic material is polyurethane.

[0045] The upper loading floor element 13 is made of a wood-based material. Specifically, the upper loading floor element 13 is a wooden panel, in particular a plywood panel. The upper loading floor element 13 can be made of several wooden panels joined together. It is also conceivable that the upper loading floor element 13 is made of a single, in particular large, wooden panel. Regarding the insulated floors 11 according to the Fig. 1 to 3 as well as Fig. In cases 4 to 6, the wooden panel is 18 mm thick. Other panel thicknesses are possible.

[0046] The lower cover layer 12 of the insulating floors 11 of the vehicle bodies 10 according to both embodiments of the invention is a profiled molded part 12'. The profiled molded part 12' is formed from a glass fiber reinforced plastic material pressed with a plastic film 15. The plastic film 15 is designed to shield against UV radiation. The glass fiber reinforced plastic material and / or the plastic film 15 comprise polyurethane. Other types of plastic are possible.

[0047] The profiled molded part 12' is therefore a GRP molded part. The profiled molded part 12' forms a separate, prefabricated component. This means that the profiled molded part 12' is manufactured before the insulating floor 11 is produced and provided as a separate component for the formation of the insulating floor 11. The profiled molded part 12' has a profile that will be described in more detail later.

[0048] The lower cover layer 12 or the profiled molded part 12' has a layer thickness of 2 mm to 4 mm, preferably approximately 3 mm. The layer thickness of the lower cover layer 12 can be uniform. Areas of increased layer thickness, e.g., for reinforcement or stiffening of the lower cover layer 12, are possible.

[0049] In the production of the lower cover layer 12 or the profiled molded part 12', the plastic film 15 is inserted into a recess of a mold. The plastic film 15 can be single-layered or multi-layered. The mold forms the negative shape of the lower cover layer 12 to be produced. The plastic film 15 is preferably drawn against an inner contour of the recess so that the plastic film 15 lies flat against the contour without creases. A layer of glass fiber is placed on the plastic film 15 and wetted with the liquid plastic material to impregnate the fiber layer with the liquid plastic material, in particular polyurethane. Subsequently, a pressing element of a pressing device presses the wetted glass fiber layer to the plastic film 15. The pressing element exerts pressure until a predetermined curing time, for example, is reached for the liquid plastic material to harden.The pressed part is then released. The finished profiled, glass fiber reinforced molded part 12' (GRP molded part) is removed from the mold and can be used to form the insulating floor 11. The GRP molded part 12' forms the lower cover layer 12. The lower cover layer 12 is dimensionally stable and has a molded-in profile. The lower cover layer 12 is essentially a flat molded part 12', with the exception of the profile integrated into the lower cover layer 12.

[0050] As in the Fig. 1, Fig. As can be clearly seen in Figures 3, 4, and 6, the lower cover layer 12 has the aforementioned profile. The profiled molded part 12' comprises a protrusion 22 and several indentations 16. It is possible that the profiled molded part 12' comprises several protrusions 22.

[0051] The bulge 22 faces away from the upper loading floor element 13. In other words, the bulge 22 increases the volume of the space 14. The indentations 16 face the upper loading floor element 13. Or, put another way, the indentations 16 decrease the volume of the space 14. The bulge 22 extends away from the upper loading floor element 13, and the indentations 16 extend towards the upper loading floor element 13, i.e., into the space 14. The bulge 22 and the indentations 16 extend in opposite directions in terms of the thickness of the insulating floor 11.

[0052] The bulge 22 is a trough-shaped area 23 in the lower cover layer 12. The lower cover layer 12 has an inner surface 29 facing the upper loading floor element 13, and an outer surface 36 facing away from the upper loading floor element 13. The bulge 22 extends outwards from the inner surface 29 of the lower cover layer 12. In other words, the bulge 22 forms a depression in the lower cover layer 12 such that the insulation thickness of the insulating floor 11 is increased. Specifically, the bulge 22 increases the insulation thickness of the foam core layer.

[0053] The trough-shaped area 23 extends longitudinally along the insulating floor 11. In other words, the depression of the lower cover layer 12 is formed longitudinally. The trough-shaped area 23 comprises approximately one-third, i.e., approximately 30 percent, of the floor area of ​​the upper loading floor element 13 of the insulating floor 11. In other words, the trough-shaped area 23 has a surface area that corresponds to approximately one-third of the floor area of ​​the upper loading floor element 13. This significantly improves the insulating effect of the insulating floor 11, since the insulating floor 11 has a greater insulation thickness in the trough-shaped area 23 than outside the trough-shaped area 23.

[0054] The trough-shaped area 23 has a depth of at least 40 mm. In other words, the trough-shaped area 23 is 40 mm or greater than 40 mm deep. The trough-shaped area 23 is at least 40 mm deep across its entire recessed area. The trough-shaped area 23 is, as shown in Fig. 3, Fig. 4 and Fig. Figure 6 shows the structure arranged between two longitudinal beams 28 of the insulating floor 11. The longitudinal beams 28 will be discussed in more detail later.

[0055] The trough-shaped area 23 is essentially cuboid in shape. Alternatively or additionally, the trough-shaped area 23 can be cylindrical. Other shapes are possible. The trough-shaped area 23 forms a projection 37 on the outer surface 36 of the lower cover layer 12 (see Fig. 1).

[0056] As described above, the profile of the GRP molded part 12' includes several indentations 16. The lower surface layer 12 has a total of five indentations 16, with a first indentation 17 designed for the external reception of a kingpin assembly 18 and four second indentations 19 each forming part of a wheel arch 21. Alternatively, two second indentations 19 are provided, each forming part of two wheel arches. The indentations 17, 19 create open spaces 36 on the outer surface, enclosed by the lower surface layer 12.

[0057] The first indentation 17 is formed in a first, in particular front, longitudinal end 35 of the insulating base 11. The first indentation 17 is cylindrical. In other words, the first indentation 17 provides a round recess. Alternatively or additionally, the first indentation 17 can be cuboid. Other shapes are possible.

[0058] Two of the second indentations 19 are formed in pairs on one of the longitudinal sides 31 of the insulating floor 11 in the area of ​​a longitudinal beam 28. The second indentations 19 are cuboid in shape. Alternatively or additionally, the second indentations 19 can be cylindrical. Other shapes are possible. The two pairs of second indentations 16 are arranged in a row in the longitudinal direction of the insulating floor 11. The bulge 22 runs between the two pairs of second indentations 19 in the longitudinal direction of the insulating floor 11.

[0059] How Fig. 3, Fig. 4 and Fig. As shown in Figure 6, the two second pair of indentations 19 are spaced apart from each other in the longitudinal direction of the insulating base 11. In other words, the two second pair of indentations 19 are separated from each other in the longitudinal direction of the insulating base 11. Alternatively, the two second pair of indentations 19 can merge into each other in the longitudinal direction of the insulating base 11 such that a single elongated second indentation 19 is formed on each of the longitudinal sides 31.

[0060] In the case of the vehicle body 10 according to Fig. 1 to 3, the lower cover layer 12 has an edge 25 on each of its longitudinal sides 24, which is angled upwards to engage a side wall 26, in particular a side wall panel, of the vehicle body 10. According to Fig. 2 The edge 25 projects at a right angle with respect to the inner side 29, in particular the inner surface, of the lower cover layer 12. The edge 25 extends over the entire length of the lower cover layer 12.

[0061] The vehicle body 10 according to Fig. 4 to 6 differs from the vehicle structure 10 according to Fig. 1 to 3 in that the lower cover layer 12 has a flat-sloping edge 33 on its longitudinal sides 24. In other words, the edge 33 of the lower cover layer 12 of the vehicle body 10 runs according to Fig. 4 to 6 straight lines, i.e., without any angled sections.

[0062] The lower cover layer 12 generally extends over the entire underside of the vehicle body 10. This applies to both embodiments. In other words, the lower cover layer 12 covers the entire insulated floor 11. The lower cover layer 12 is continuous. Or, to put it another way, the lower cover layer 12 is free of any openings. The lower cover layer 12 is thus continuous. The lower cover layer 12 forms a bottom seal for the vehicle body 10. When the vehicle body 10 is assembled, the lower cover layer 12 faces the chassis. The chassis can rest directly on the lower cover layer 12.

[0063] Furthermore, the insulating floor 11 has several crossbeams 27 and two longitudinal beams 28. This is in Fig. 5 and Fig. Figure 6 is clearly visible. The insulating base 11 has a total of two long sides 31 and two short sides 32. The long sides 31 and the short sides 32 are perpendicular to each other.

[0064] The longitudinal beams 28 are arranged in the area of ​​the longitudinal sides 31 of the insulating floor 11. The two longitudinal beams 28 laterally define the space 14. In other words, the two longitudinal beams 28 define the foam core layer on the longitudinal sides 31 of the insulating floor 11. The longitudinal beams 28 have, as shown in Fig. Figure 2 shows an L-shaped profile in cross-section. On one upper side, each longitudinal beam 18 has a support section 34, which is stepped and extends in the longitudinal direction of the longitudinal beams 28. The upper loading floor element 13 rests against the edge of the support section 34.

[0065] As in the Fig. 5 and Fig. As shown in Figure 6, several crossbeams 27 are arranged in the space 14. For clarity, the foam core layer is hidden. The crossbeams 27 are embedded in the foam core layer. In other words, the crossbeams 27 are integrated into the insulating floor 11. The crossbeams 27 extend between the two longitudinal beams 28. In other words, the crossbeams 27 are arranged transversely between the two longitudinal beams 28. The crossbeams 27 are I-beams. The crossbeams 27 and the longitudinal beams 28 are made of glass fiber reinforced plastic. Alternatively, the longitudinal beams 28 can be made of a plastic material without glass fiber reinforcement.

[0066] The crossbeams 27 are arranged in the region of one longitudinal end 35 of the insulating floor 11. It is possible that additional crossbeams 27, not shown, are arranged distributed over the entire length of the insulating floor 11. As shown in the Fig. 5 and Fig. As can be seen in Figure 6, a kingpin assembly 18 is arranged on the lower cover layer 12 in the area of ​​the longitudinal end 35 on the outside. Particularly high forces occur in this area during operation, which are transferred into the vehicle body 10. To stiffen the insulated floor 11, a plurality of crossbeams 27 are arranged in the space 14 in the area of ​​the kingpin assembly 18.

[0067] The following describes how the insulating floor 11 of the vehicle superstructures 10 is manufactured according to both embodiments.

[0068] In a first process step, the prefabricated lower cover layer 12 is bonded to the crossbeams 27 and longitudinal beams 28. Specifically, the crossbeams 27 and longitudinal beams 28 are bonded to the inner surface 29 of the lower cover layer 12. The beams 27 and 28 are aligned as described above. The upper loading floor element 13 is placed on the crossbeams 27 and bonded to them. At its edges, the upper loading floor element 13 rests on the support section 34. This is in Fig. 2 clearly visible. The upper loading floor element 13 is also bonded to the longitudinal beams 28.

[0069] The gap 14 formed between the upper loading floor element 13 and the lower cover layer 12 is subsequently filled with a self-expanding liquid plastic material, in particular polyurethane, such that a thermally insulating foam core layer is formed. The gaps between the crossbeams 27 and the recess 22 are completely filled with foam. Reference symbol list 10 Vehicle body 11 Insulated floor 12 lower cover layer 12' molded part 13 upper loading floor element 14 space 15 plastic film 16 indentation 17 first indentation 18 Kingpin mechanism 19 second indentations 21 Wheel arch 22 Bulge 23 tub-shaped area 24 Long side of the lower cover layer 25 Rand 26 Side wall of the vehicle body 27 crossbeams 28 longitudinal beams 29 Inside of the lower cover layer 31 long sides 32 narrow pages 33 flat-sloping edge 34th edition section 35 Longitudinal end 36 Outer surface of the lower cover layer 37 Formation

Claims

[1] Vehicle body (10), in particular of a refrigerated vehicle, with an insulated floor (11) comprising at least one lower cover layer (12) and at least one upper loading floor element (13), in particular at least one wooden panel, arranged opposite the lower cover layer (12), wherein a space (14) formed between the lower cover layer (12) and the upper loading floor element (13) is filled by a thermally insulating foam material, wherein the lower cover layer (12) is a profiled molded part (12') formed from at least one plastic film (15) and fiber-reinforced, in particular glass fiber-reinforced, plastic material pressed with the plastic film (15), wherein the lower cover layer (12) has at least one bulge (22) extending in a direction away from the space (14), in particular downwards, characterized by, that the insulating floor (11) has an increased insulation thickness in the area of ​​the bulge (22). [2] Vehicle body (10) according to claim 1, characterized by , that the lower cover layer (12) is formed over the entire area of ​​the insulating floor (11). [3] Vehicle body (10) according to claim 1 or 2, characterized by , that the bulge forms a trough-shaped area (23) of the lower cover layer (12) which extends in a longitudinal direction of the vehicle body (10). [4] Vehicle body (10) according to any one of the preceding claims, characterized by that the lower cover layer (12) has at least one indentation (16) extending into the space (14). [5] Vehicle body (10) according to any one of the preceding claims, characterized by, that the lower cover layer (12) has at least one first indentation (17) for receiving a kingpin device (18) and / or several second indentations (19) which are part of a wheel tread (21). [6] Vehicle body (10) according to any one of the preceding claims, characterized by , that the lower cover layer (12) has an edge (25) on each of its longitudinal sides (24) which is angled upwards to engage a side wall (26) of the vehicle body (10). [7] Vehicle body (10) according to any one of the preceding claims, characterized by , that several crossbeams (27), in particular I-beams, are arranged in the space (14), and at least two longitudinal beams (28) laterally define the space (14), wherein the crossbeams and / or longitudinal beams (27, 28) preferably lie directly against the lower cover layer (12) and / or the upper loading floor element (13). [8] Vehicle body (10) according to claim 7, characterized by, that the cross and / or longitudinal beams (27, 28) are bonded to the lower cover layer (12) and / or to the upper loading floor element (13). [9] Refrigerated vehicle with at least one vehicle body (10) according to any of the preceding claims.

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