A FLOOR FOR A CONTAINER, A CONTAINER COMPRISING A FLOOR PART, A FLOOR PART AND A METHOD OF MANUFACTURING A FLOOR SECTION

Abstract

The invention relates to a floor (10) for a container, the floor comprising at least one section (11,11′,11″) is, wherein the floor section (11,11′,11″) is formed from a single sheet element and includes a number of protruding elements (20′, 20″, 20″) and a base (28), the floor section (11,11′,11″) has a polygonal shape with a length (L) extending in a first direction (X) and a width (W) extending in a second direction (Y) being perpendicular to the first direction (X), each protruding element (20, 20′, 20″) includes a base element having two side walls (22,23) extending perpendicularly from a base (28) of the floor section (11,11′,11″). The invention further relates to a method of manufacture of a floor section (11, 11′, 11″) for a container floor (10).

Claims

1. A floor for a container, the floor comprising at least one floor section, wherein the floor section is formed from one or more sheet elements and includes a number of protruding elements and a base; the floor section has a rectangular shape with a length extending in a first direction and a width extending in a second direction being perpendicular to the first direction; each protruding element includes a head and a base element having two side walls extending perpendicularly from the base of the floor section, wherein the two side walls are formed with a spacing in between each other; an air duct is formed between two neighbouring protruding elements for allowing air to be guided in said air duct; a distance between two neighbouring heads is smaller, than a maximum width of the air duct, preferably having a ratio of 1:1.5 to 1:2.0.

2. A floor according to claim 1, wherein the base element is connected to a head being substantially parallel with and offset relative to the base of the floor section, wherein the two side walls are parallel with each other.

3. A floor according to claim 2, wherein a transition portion is formed and located between the head and the two side walls.

4. A floor according to claim 1, wherein the base element is connected to a head being offset relative to the base of the floor section, wherein the two side walls are concave relative to one another.

5. A floor according to claim 1, wherein each of the protruding elements extends in a first direction of said floor section and the distance between two side walls being at least 1 mm and the distance being at least 10 mm.

6. A floor according to claim 1, wherein the base includes a first end and a second end positioned opposite the first end, wherein the first end of the base is elevated relative to the base and being configured for engaging a corresponding second end of another floor section.

7. A floor according to claim 1, wherein the protruding element is formed by a roll forming the sheet material into a number of floor sections including a number of protruding elements.

8. A floor according to claim 1, wherein each floor section has protruding elements being arranged in more than one row.

9. A floor according to claim 1, wherein the floor section forms an air duct for transporting a cooling air in each floor section of the container.

10. A floor according to claim 1, wherein the single sheet element is metal sheet, preferably high grated stainless steel.

11. A container comprising a floor part, an end wall, a roof lining forming a ceiling, two opposite side walls and a floor according to claim 1, wherein the floor is connected to each of the opposite side walls and an inner compartment being formed between the floor part and the floor, wherein the inner compartment formed by the floor part and an underside of the floor is adapted to be filled with an insulation material.

12. A floor section for a container floor, the floor section being formed from a sheet element and having a rectangular shape with a length extending in a first direction and a width extending in a second direction being perpendicular to the first direction, the floor section comprising: a plurality of protruding elements extending from a base; wherein each protruding element extends longitudinally in the first direction and comprises: a head; and two side walls connected between the base of the floor section and the head; wherein the head extends in the second direction by a first distance and at least a portion of the side walls extend in the second direction by a second distance and the first distance is greater than the second distance; wherein an air duct is formed between the base, the heads, and the side walls of two neighbouring protruding elements and is arranged to guide an air flow within the air duct.

13. A method of manufacture of a floor section for a container floor comprising: providing a sheet element and having a rectangular shape with a length extending in a first direction and a width extending in a second direction being perpendicular to the first direction forming a plurality of protruding elements extending from a base; wherein each protruding element extends longitudinally in the first direction and comprises: a head; and two side walls connected between the base of the floor section and the head; wherein the head extends in the second direction by a first distance and at least a portion of the side walls extend in the second direction by a second distance and the first distance is greater than the second distance; wherein an air duct is formed between the base, the heads, and the side walls of two neighbouring protruding elements and is arranged to guide an air flow within the air duct.

Description

[0043] The above and other features and advantages of the present invention will become readily apparent to those skilled in the art by the following detailed description of exemplary embodiments thereof with reference to the attached drawings, in which:

[0044] FIG. 1A shows a schematic drawing of the inside of a container.

[0045] FIG. 1B shows a drawing of the floor for the container shown in FIG. 1A.

[0046] FIG. 2 shows a close-up view (AA) of the floor shown in FIG. 1B.

[0047] FIG. 3A shows close-up view (BB) of the floor shown in FIG. 1B.

[0048] FIG. 3B schematically shows a close-up view (CC) of four protruding elements according to one embodiment shown in FIG. 3A.

[0049] FIGS. 4A-4C show alternative embodiments of the protruding elements.

[0050] FIG. 5 shows a principal drawing of a roll forming machine suitable for forming a single sheet into a floor section.

[0051] Various embodiments are described hereinafter with reference to the figures. Like reference numerals refer to like elements throughout. Like elements will, thus, not be described in detail with respect to the description of each figure.

[0052] It should also be noted that the figures are only intended to facilitate the description of the embodiments.

[0053] An aspect or an advantage described in conjunction with a particular embodiment is not necessarily limited to that embodiment and can be practiced in any other embodiments even if not so illustrated, or if not so explicitly described. Throughout, the same reference numerals are used for identical or corresponding parts.

[0054] FIG. 1A shows a container 1 such as a reefer container from one end thereof. The container 1 could be a reefer container, a truck or railway container. The container 1 provides a cooling compartment comprising a floor part 2, an end wall 3 and a roof lining forming a ceiling 4 (roof structure) in the container 1, a pair of opposite side walls 5 and an open end closable by a pair of doors 6, 7. A reefer unit (not shown) can be integrated in the end wall, e.g. the reefer unit could be installed afterwards.

[0055] The container can be used for transporting cargo and the container is substantially rectangular. All the structural parts such as side walls 5, floor part 2 of the container can be formed from metal sheet, preferably a steel material. Stainless steel or Fiber Reinforced Plastic (FRP) can be used on the inside as well. A floor 10 is configured to be positioned and arranged inside the container 1.

[0056] Reefer containers have the ability to maintain the cargo at the required temperatures for the duration of the transit of the cargo being stored inside the reefer container. The interior cladding or the lining can consist of steel sheet, such as stainless steel. Aluminium is commonly used for the roof part, as well is Fiber Reinforced Plastic (FRP) for roof and sides. The flooring inside the container allows for proper air circulation around perishable cargo as well as proper drainage of condensation.

[0057] In all the FIGS, a sheet material is roll formed into a number of floor sections having a number of protruding elements 20, 20′, 20″. The single sheet element is metal sheet, preferably high grated stainless steel (HGSS).

[0058] The floor 10 shown in FIG. 1B is intended to be installed in the lower part of the container 1 more preferably resting on the floor part 2 of the container 1.

[0059] FIG. 2 shows a close-up view (AA) of the floor shown in FIG. 1B. The floor consist of a number of floor sections 11 to form a floor 10 in a container. Each floor section 11 includes a number of protruding elements 20, which will be explained in further details with reference to FIGS. 4A-4C. Each floor section 11 has a rectangular (polygonal) shape with a length (L) extending in a first direction (X) and a width (W) extending in a second direction (Y) being perpendicular to the first direction (X). FIG. 2 shows only a part of the full length.

[0060] FIG. 3A shows a floor similarly to the floor shown in FIG. 1B, but the floor consists of a number of floor sections 11 interconnected to form a floor for a container. A number of floor sections is formed from sheet material, where each floor section 11 has a number of protruding elements 20. The protruding elements can be arranged in more than one row. The floor 10 is formed by a number of floor sections 11, each comprising a number of protruding elements 20. When all sections are interconnected forming the floor 10, the upper surfaces of the protruding elements 20 together constitutes a support on which cargo can be placed and handled. The floor 10 is connected to each of a pair of opposite side walls 12 and an inner compartment is formed between the floor part 2 (shown in FIG. 1A) and the floor 10 and the inner compartment can be filled with an insulation material.

[0061] FIG. 3A shows a floor 10 for a container, in particular a refrigeration container, in a view from an end face. The floor 10 comprises a plurality of floor sections 11, where each of the floor sections 11 are formed from a single sheet element and includes a number of protruding elements 20, more specifically each floor section 11 includes a number of protruding elements 20 and a base 28 (see FIG. 3B). The bottom of the floor section 11 is supported by a number of supporting elements 30 for at least partially supporting each floor section.

[0062] As shown in FIG. 3B, the base 28 includes a first end 29 and second end 30 positioned opposite the first end 29, where the first end 29 of the base 28 is elevated relative to the base and is configured for engaging a corresponding second end of another floor section 11, as described above. An overlap of directly adjacent floor sections 11 is done by positioning the floor sections 11 beside one another with an overlap before welding the sections together. However, it could be possible to form the floor without the floor sections overlapping each other by simply welding the edges together.

[0063] An internal spacing is formed between two side walls 22, 23 of the protruding element 20 and the internal spacing can be filled with a filler plastic. This filler plastic creates a shear-proof adhesive connection, so that the protruding element as a whole functions as shear-proof spacers.

[0064] In one embodiment, each protruding element 20 has a head 21 and the sheet material, from which the floor sections are made, can have a material thickness up to 2 mm, preferably 0.5-1.5 mm. The length (L) of the floor section 11 can amount to 5896-12035 mm. The width (W) of the floor sections 11 can amount to 2200-2350 mm. Each of the floor sections 11 can comprise of a number of protruding elements 20 and the floor 10 could consist of a number of floor sections 11. In one example each of the floor sections 11 can comprise of a number of between five and seven protruding elements 20 and the floor 10 could consist of a number of five to seven floor sections 11.

[0065] In FIGS. 4A-4C, the each floor sections has a number of protruding elements 20, 20′, 20″ and the base 28. The floor sections are produced by roll forming a steel sheet. In FIGS. 4A and 4C, the base element includes two side walls 22, 23 connected to the base 28 via an inclined lower transition element 26, 27. Each protruding element has a stem portion being narrower than the head 21 having a width being shorter than the head 21. In this way, the head 21 overhangs the two side walls 22, 23.

[0066] Referring now to FIGS. 4A-4C, the floor 10 includes a number of floor sections 11, where the base element includes a head 21 being substantially parallel with and offset relative to the base 28 of the respective floor section 11, 11′, 11″ shown in FIGS. 4A-4C.

[0067] Referring now to FIG. 4A, the two side walls 22, 23 are parallel with each other and are being spaced from one another. A transition portion 220 is formed and located between the head 21 and the two side walls 22, 23.

[0068] Referring now to FIG. 4B, the floor section 11′ has a base element including a head 21 being offset relative to the base 28 of the floor section 11′, wherein the two side walls 24, 25 are concave relative to one another. A transition portion 220 is formed and located between the head 21 and the two side walls 24, 25.

[0069] Referring now to FIG. 4C, the two side walls 22, 23 are parallel with each other and are being spaced from one another, having a distance being greater than the distance between the two side walls 22, 23 shown in the embodiment in FIG. 4A. An inclining transition portion 220 is formed and located between the head 21 and the two side walls 22, 23.

[0070] FIG. 5 shows a principal drawing of a roll forming machine suitable for forming a single sheet into a floor section having a number of protruding elements. The roll forming machine comprising a number of first rollers 44, 46 and second rollers 42, 48, wherein the first rollers 44, 46 have a first rotational axis Z positioned substantially perpendicular to a first direction corresponding to the feeding direction X of the roll forming machine, wherein the second rollers 42, 48 have a second rotational axis Y being perpendicular to the first rotational axis Z.

[0071] According to an aspect of the present invention a floor section 11,11′,11″ for a container floor 10, the floor section being formed from a sheet element and having a rectangular shape with a length L extending in a first direction X and a width W extending in a second direction Y being perpendicular to the first direction X, the floor section comprising: [0072] a plurality of protruding elements 20′, 20″, 20″ extending from a base 28; wherein each protruding element 20, 20′, 20″ extends longitudinally in the first direction and comprises: [0073] a head 21; and [0074] two side walls 22, 23, 24, 25 connected between the base 28 of the floor section 11, 11′, 11″ and the head; [0075] wherein the head extends in the second direction by a first distance and at least a portion of the side walls extend in the second direction by a second distance and the first distance is greater than the second distance; [0076] wherein an air duct A is formed between the base, the heads, and the side walls of two neighbouring protruding elements 20, 20′, 20″ and is arranged to guide an air flow within the air duct.

[0077] The floor section 11,11′,11″ for a container floor 10 can be manufactured by a method comprising: [0078] providing a sheet element and having a rectangular shape with a length (L) extending in a first direction (X) and a width (W) extending in a second direction (Y) being perpendicular to the first direction (X) [0079] forming a plurality of protruding elements 20′, 20″, 20″ extending from a base 28; wherein each protruding element 20, 20′, 20″ extends longitudinally in the first direction and comprises: [0080] a head 21; and [0081] two side walls 22, 23, 24, 25 connected between the base 28 of the floor section 11, 11′, 11″ and the head; [0082] wherein the head extends in the second direction by a first distance and at least a portion of the side walls extend in the second direction by a second distance and the first distance is greater than the second distance; [0083] wherein an air duct A is formed between the base, the heads, and the side walls of two neighbouring protruding elements 20, 20′, 20″ and is arranged to guide an air flow within the air duct.