Cover for underfloor storage or inspection hatch

Abstract

To provide a cover body for an underfloor storage or an access port that can decrease a thickness dimension of the cover body, and has light weight for easy handling, while having a constant heat insulation property.SOLUTION: A rear side member 3 comprises an upper surface part 31, a lower surface part 32 where its lower part is swollen, and a grid structure (or honeycomb structure) reinforcement rib part 33 that is configured by being arranged inside a space formed by coupling the upper surface part 31 and the lower surface part 32, which are formed of a synthetic resin material respectively. The rear side member 3 is constituted by integrating the upper surface part 31, the lower surface part 32 and the reinforcement rib part 33.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cover for an underfloor storage compartment or an inspection hatch. [Background technology]

[0002] Conventionally, covers used to close the openings of underfloor storage compartments and inspection hatches have been provided with heat insulating material inside the cover to block cold air from outside. This type of lid body with insulation inside consists of a front member of the lid body, a back cover that is open at the top and bulges at the bottom, and insulation placed inside the back cover, and these members are combined and assembled using fastening means such as bolts and screws (see, for example, Patent Document 1).

[0003] Incidentally, in the lid body of Patent Document 1, the front member has supporting strength, and the back cover is provided simply to cover the heat insulating material. For this reason, the above-mentioned lid body is difficult to handle because there are restrictions on the front side material that can be used, and because the back side cover, which is open at the top, is attached directly to the front side material, it has low insulating performance.In particular, in order to be able to withstand cold climates, it becomes necessary to place a lot of insulating material inside, which increases the thickness and weight of the lid body, making it inconvenient to handle, and when used as a lid body for an underfloor storage cabinet, the storage space of the storage box is encroached upon, making it impossible to ensure sufficient storage space.

[0004] To address this problem, the applicant previously proposed a lid body in which the internal structure, in which the insulating material is partitioned by reinforcing rib material, is covered with an outer shell made of thermoplastic resin by blow molding (see Patent Document 2).

[0005] The lid body of Patent Document 2 has the advantages of being lightweight and easy to handle, as well as having sufficient heat insulating properties, but on the other hand, it is time-consuming to manufacture, increasing manufacturing costs, and there are limitations on the shapes that can be molded, making it difficult to form screw holes for fixing the front member and mounting parts for the rotating handle. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-213923 [Patent Document 2] Japanese Patent Application Laid-Open No. 2013-72198 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention aims to provide a cover for an underfloor storage cabinet or inspection hatch that can solve the problems associated with the above-mentioned conventional cover bodies, has a certain level of insulating performance, yet allows the thickness of the cover body to be reduced, and is lightweight and easy to handle. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the cover for an underfloor storage cabinet or inspection hatch of the present invention is a cover used to close the opening of an underfloor storage cabinet or inspection hatch, which is made up of an integrated front and back member, and is characterized in that the back member has an upper surface portion made of a synthetic resin material, a lower surface portion that bulges downward, and a reinforcing rib portion with a lattice structure or honeycomb structure that is arranged in the space formed by joining the upper surface portion and the lower surface portion, and the upper surface portion, lower surface portion and reinforcing rib portion are integrated.

[0009] In this case, the integration can be achieved by welding or bonding.

[0010] The reinforcing rib portion may be integrally formed with the upper surface portion or the lower surface portion.

[0011] The front member may be attached to the surface of the upper surface of the rear member via an adhesive layer.

[0012] Furthermore, a protrusion for regulating the position of the front member may be formed on the surface of the upper surface of the rear member.

[0013] In addition, the mounting surface of the packing mounting portion can be formed on the back surface of the lower surface portion of the rear side member as an inclined surface with different heights at least on the inner and outer peripheral sides of the corner portion. [Effects of the Invention]

[0014] According to the lid for an underfloor storage cabinet or inspection hatch of the present invention, the lid is made up of a front member and a back member that are integrated together, and the back member has an upper surface formed from a synthetic resin material, a lower surface that bulges out downward, and a reinforcing rib portion with a lattice structure or honeycomb structure that is arranged in the space formed by joining the upper and lower surfaces.By integrating the upper surface, lower surface, and reinforcing rib portion, the space in the back member is divided by the reinforcing rib portion with a lattice structure or honeycomb structure, and the strength of the back member is increased while maintaining a certain level of insulating performance, so the thickness dimension of the lid can be reduced, making it lightweight and easy to handle.

[0015] Furthermore, by integrating the components by welding or bonding, the manufacturing process is easy and the manufacturing cost can be reduced.

[0016] Furthermore, by forming the reinforcing rib portion integrally with the upper surface portion or the lower surface portion, manufacturing is easy and strength can be further improved.

[0017] Furthermore, by attaching the front member to the surface of the upper surface of the back member via an adhesive layer, it is possible to easily align the joints and patterns of the flooring and the front member.

[0018] Furthermore, by forming a protrusion on the surface of the upper surface of the rear member to regulate the position of the front member, it becomes possible to easily align the upper surface of the rear member with the front member, and it is possible to prevent the incorrect attachment of front members with different dimensions or shapes.

[0019] Furthermore, by forming the mounting surface of the packing mounting portion on the back surface of the lower surface portion of the rear member as an inclined surface with different heights at least on the inner and outer sides of the corner portion, it is possible to prevent the packing from twisting or wrinkling at the corner portion, thereby improving the mounting property and airtightness of the packing. [Brief explanation of the drawings]

[0020] [Figure 1] 1A and 1B show an embodiment of the rear part of the cover for an underfloor storage compartment or inspection hatch of the present invention, where FIG. 1A is a plan view and FIG. 1B is a vertical cross-sectional view showing an example of application to an underfloor storage compartment. [Figure 2] 1A, 1B, and 1C show the upper surface of the rear member of the cover for the storage cabinet or inspection hatch, where FIG. 1A is a plan view, FIG. 1B is a front view, and FIG. 1C is a bottom view. [Figure 3] 10A, 10B, and 10C show the integrally molded underside and reinforcing rib portions of the rear member of the cover for the storage cabinet or inspection hatch, where FIG. 10A is a plan view, FIG. 10B is a front view, and FIG. 10C is a bottom view. [Figure 4] FIG. 10 is a perspective view showing the lower surface and reinforcing rib portion integrally molded with the upper surface of the rear member of the cover for the storage cabinet or inspection hatch. [Figure 5] FIG. 2 is a perspective view showing a rear member of the cover for the storage cabinet or inspection hatch. [Figure 6] FIG. 10 is a plan view of the integrally molded underside and reinforcing rib portions showing the welded portions of the backside member of the cover for the storage cabinet or inspection hatch. [Figure 7] 3(a) is a cross-sectional view taken along line AA in FIG. 3(c), and FIG. 3(b) is an enlarged view of part B in FIG. 3(a). [Figure 8]1A and 1B show an embodiment of a cover for an underfloor storage compartment or inspection hatch of the present invention, in which FIG. 1A is a plan view and FIG. 1B is a vertical cross-sectional view showing an example in which the cover is applied to an underfloor inspection hatch. DETAILED DESCRIPTION OF THE INVENTION

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cover for an underfloor storage compartment or an inspection hatch of the present invention will be described below with reference to the drawings.

[0022] 1 to 8 show an embodiment of a cover for an underfloor storage compartment or an inspection hatch according to the present invention. This cover 1 for an underfloor storage cabinet or inspection hatch is used to close the opening of the underfloor storage cabinet or inspection hatch and is made up of a front member 2 and a back member 3 that are integrated together. The back member 3 is made up of a synthetic resin material such as a polyolefin resin such as polypropylene resin, ABS resin, or vinyl chloride resin, and is equipped with an upper surface portion 31, a lower surface portion 32 that bulges downward, and a reinforcing rib portion 33 with a lattice structure (or honeycomb structure) that is arranged in the space formed by joining the upper surface portion 31 and the lower surface portion 32, and the upper surface portion 31, lower surface portion 32 and reinforcing rib portion 33 are integrated together.

[0023] In this case, the upper surface portion 31, the lower surface portion 32 and the reinforcing rib portion 33 can be integrated by joining the separate portions together by friction welding, welding by heat or bonding with an adhesive. This makes manufacturing easier and reduces manufacturing costs.

[0024] In addition, the upper surface portion 31, the lower surface portion 32 and the reinforcing rib portion 33 may all be constructed as separate bodies, or the reinforcing rib portion 33 may be molded integrally with the upper surface portion 31 or the lower surface portion 32. This makes it possible to easily manufacture the device and further improve its strength.

[0025] More specifically, in this embodiment, the reinforcing rib portion 33 is integrally molded with the lower surface portion 32, and the upper surface portion 31, the lower surface portion 32, and the reinforcing rib portion 33 are integrated by friction welding or heat welding. Here, the upper surface portion 31, the lower surface portion 32 and the reinforcing rib portion 33 are the hatched areas in Figure 6, i.e., the entire surface of the upper surface portion 31 is integrated with the lower surface portion 32 and the reinforcing rib portion 33 by friction welding or heat welding, so the spaces between the ribs of the reinforcing rib portion 33 are sealed, further improving the insulation properties and strength.

[0026] Here, there are no particular restrictions on the shapes that the upper surface portion 31, the lower surface portion 32 and the reinforcing rib portion 33 can be molded into. If necessary, screw holes 31a, 32a may be formed in the upper surface portion 31 and the lower surface portion 32, which also serve as alignment (to prevent incorrect assembly orientation). If necessary, a protrusion 31b for regulating the position of the front side member 2 is provided on the surface of the upper surface portion 31, and a protrusion 31b for aligning with the lower surface portion 32 and the reinforcing rib portion 33 is provided on the back surface. c can be formed respectively. In addition, mounting portions 31d, 32d for the rotating handle 7 are formed on the upper surface portion 31 and the lower surface portion 32, respectively, and further, a protrusion 31e for regulating the position of the front side member 2 can be formed around the outer periphery of the mounting portion 31d for the rotating handle 7 on the upper surface portion 31. In this way, by forming protrusions 31b, 31e on the upper surface portion 31 to regulate the position of the front side member 2, it is possible to easily align the front side member 2 and to prevent the wrong attachment of a front side member 2 with different dimensions or shapes.

[0027] 3(c) and 7, a packing mounting portion 34 is formed in the shape of a circumferential groove on the rear surface of the lower surface portion 32 of the rear side member 3. This packing mounting portion 34 consists of a straight portion 34a and a corner portion 34b, and the mounting surface of the packing mounting portion 34 for mounting the packing 35 is formed as an inclined surface with different heights on the inner and outer peripheral sides. Here, the areas to be formed with inclined surfaces are at least the corner portions 34b (in this embodiment, the entire packing mounting portion 34 consisting of the straight portion 34a and the corner portions 34b. The inclined surfaces of the straight portion 34a are extended directly to the corner portions 34b, and are made into a rounded shape or a shape with rounded corners. The straight portion 34a can also be formed on a horizontal surface.). The inclined surface may be formed as a downward inward inclined surface as in this embodiment, or may be formed as a downward outward inclined surface. A packing 35 having a substantially rectangular cross section is attached to the packing attachment portion 34 continuously from the straight portion 34a to the corner portion 34b. In this way, by forming the mounting surface of the packing mounting portion 34 as an inclined surface, it is possible to reduce the difference in expansion and contraction between the inner and outer circumferential sides of the packing 35 mounted on the packing mounting portion at the corners of the packing mounting portion formed in a circumferential groove shape, thereby preventing twisting and wrinkling of the packing 35 at the corner portions 34b and improving the mountability and airtightness of the packing 35.

[0028] In the embodiment shown in FIG. 1, the spaces between the ribs of the reinforcing rib portion 33 are left as spaces, but the spaces between the ribs of the reinforcing rib portion 33 can also be filled with a heat insulating material such as foamed resin, glass wool, or rock wool.

[0029] According to this cover 1 for an underfloor storage cabinet or inspection hatch, the cover 1 is formed by integrating a front member 2 and a back member 3, and the back member 3 is made of a synthetic resin material and includes an upper surface 31, a lower surface 32 that bulges downward, and a reinforcing rib portion 33 with a lattice structure (or honeycomb structure) that is arranged in the space formed by joining the upper surface 31 and the lower surface 32. By integrating the upper surface 31, the lower surface 32, and the reinforcing rib portion 33, the space of the back member 3 is divided by the reinforcing rib portion 33 with a lattice structure (or honeycomb structure). This increases the strength of the back member 3 while maintaining a certain level of thermal insulation performance, and allows the thickness of the cover 1 to be reduced (in the embodiment shown in Figure 1, for example, the thickness of the back member 3 can be set to approximately 20 to 30 mm, and the thickness of the cover 1 can be set to approximately 40 mm), making it lightweight and easy to handle. Furthermore, as shown in FIG. 1(b), this prevents the storage space of the storage box 4 in the underfloor storage compartment from being encroached upon, and ensures sufficient storage space.

[0030] This back side member 3, like the cover body 1 for a conventional underfloor storage cabinet or inspection hatch, can be combined with a front side member 2 made of the same material as the floor material F, as shown in Figure 8, and assembled using fastening means such as screws (not shown) and a frame member 5 via screw holes 31a and 32a to form a cover body 1 that can be fitted into a frame member 6 of an opening formed in the floor surface (floor material F).

[0031] In this case, since the same material as the flooring material F is used for the front side member 2, the thickness of the back side member 3 is changed to match the thickness of the flooring material F (usually, there are flooring materials of 12 mm or 15 mm, as well as cushion flooring materials of about 2 mm). The thickness dimension of the back side member 3 can be changed by using an upper surface portion 31 with a different thickness dimension, which eliminates restrictions on the usable front side member 2 and enables the lower surface portion 32 and reinforcing rib portion 33 to be standardized.

[0032] Incidentally, when assembling the front side member 2 to the back side member 3, an adhesive layer can be formed on the surface of the upper surface portion 31 of the back side member 3 using double-sided tape or the like, and the front side member 2 can be attached by aligning the joints and patterns of the flooring material F and the front side member 2 via this adhesive layer. In this case, fastening means such as screws (not shown) and the frame member 5 can be used in combination. This makes it easy to align the joints and patterns of the floor material F and the front side member 2.

[0033] The above describes the cover for the underfloor storage cabinet or inspection hatch of the present invention based on its embodiments, but the present invention is not limited to the configuration described in the above embodiments, and the configuration can be changed as appropriate within the scope of the spirit of the present invention. [Industrial Applicability]

[0034] The cover for an underfloor storage cabinet or inspection hatch of the present invention has a certain level of insulating performance, while allowing the thickness of the cover to be reduced, and it is lightweight and easy to handle, making it suitable for use as a cover for an underfloor storage cabinet or a cover for an underfloor inspection hatch. [Explanation of symbols]

[0035] 1 Lid 2 Front side member 3 Back side material 31 Top part 31a screw hole 32 Bottom part 32a screw hole 33 Reinforcing rib 34 Packing mounting part 34a Straight section 34b Corner 35 Gasket 4 storage boxes 5 Frame members 6 Frame members 7 Rotating Handle F. Flooring

Claims

1. A method for manufacturing a lid body for an underfloor storage bay or inspection hatch, which is made by integrating a front member and a back member and is used to close the opening of an underfloor storage bay or inspection hatch, characterized in that the back member has an upper surface portion made of a synthetic resin material, a lower surface portion that bulges downward, and a reinforcing rib portion with a lattice structure or honeycomb structure that is arranged in the space formed by joining the upper surface portion and the lower surface portion, and the upper surface portion, lower surface portion and reinforcing rib portion are integrated, and the thickness dimension of the back member can be changed by selecting and using an upper surface portion with a different thickness dimension to match the thickness dimension of the front member.

2. 2. The method for manufacturing a cover for an underfloor storage compartment or an inspection hatch according to claim 1, wherein the upper surface portion, the lower surface portion and the reinforcing rib portion are integrated by welding or bonding.

3. 3. The method for manufacturing a cover for an underfloor storage compartment or an inspection hatch according to claim 1, wherein the reinforcing rib portion is integrally formed with the underside portion.

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