JP2008093323A - Plate-shaped bathtub cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bathtub cover remarkably excellent in a thermal insulation characteristic, covering the bathtub top surface for thermal insulation purpose, particularly related to the plane platelike bathtub cover to be used in combination of one piece or several pieces. <P>SOLUTION: On the lower surface of the peripheral edge of the main body of platelike cover 11 along the inside of edge protector 12 provided on the peripheral edge, a heat-insulating packing 13 for heat radiation prevention made of a strip of heat-insulating synthetic resin is pasted and provided. The heat-insulating packing 13 may be separately provided other than the edge protector 12, or it may be provided integrally with it, by extending the bottom flange of the edge protector 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a bath lid that is applied to the upper surface of a bathtub for the purpose of keeping warm bath water, and more particularly to a flat-type bathtub lid that is used in a combination of one or a plurality of sheets.

Conventionally, as this type of flat type bathtub lid, as shown in Patent Documents 1 to 4, aluminum plates (aluminum) having a thickness of about 0.15 to 0.20 mm are formed on both upper and lower surfaces of a heat insulating core plate made of a synthetic resin foam. In many cases, a lid body is composed of a laminated plate obtained by laminating and integrating metal thin plates (including alloy plates) and the like, and an edge protector made of a synthetic resin is mounted on the peripheral edge thereof.
JP-A-8-103389 Registered Utility Model No. 3002474 Japanese Utility Model Publication No. 2-82987 Japanese Patent No. 3590344

  In recent years, as a bathtub, what is called a heat insulation bathtub with a high degree of heat insulation on the tank wall has been widely adopted, but with this, as a bathtub lid used for the heat insulation bathtub, as well as conventional products In addition, there is a need for a bathtub lid having a higher level of heat retention performance.

  Under such a request, the present inventor conducted an investigation and research on the difference and the cause of the thermal insulation characteristics of various types of conventional bathtub lids, and attempted to improve the thermal insulation characteristics by increasing the thermal insulation performance of the lid body. It was found that there is a certain limit to this, and that the thermal insulation performance is greatly influenced by other factors.

  As a result of further investigations, surprisingly, as indicated by an arrow A in FIG. 6, the distance between the contact surface between the upper edge surface (10a) of the bathtub (10) and the lower surface of the peripheral edge of the bathtub lid (1). And it was found that the escape of heat from the neighboring area has a considerable influence on the heat retention characteristics of the bathtub lid. In particular, as shown in FIG. 6, most of the plate-shaped bathtub lid (1) has an edge protector (2) made of elastic synthetic resin or rubber on the periphery of the plate-shaped lid main body (1a). In addition to the fact that a small gap is often generated between the lower surface of the edge protector (2) and the upper edge surface of the bathtub (10) during the lid application, It was found that the escape of heat in the bathtub from the vicinity of the abutting surface had a great influence on the aging of the bath temperature due to the small contact area between the two even in places where it did not occur. .

  Based on the above elucidation and knowledge, the present invention seeks to provide a bathtub lid that is further superior in heat retention characteristics than the conventional product by blocking the heat escape route that passes through the peripheral edge of the bathtub lid. Is.

  It is another object of the present invention to provide a highly safe bathtub lid capable of improving the laying stability when using the lid of the bathtub lid and avoiding the danger caused by accidental sliding movement.

  The present invention provides the following means for solving the above problems.

  [1] A plate-like bathtub lid characterized in that a belt-like heat escape preventing heat-insulating packing is attached to the peripheral edge of the lower surface of the plate-like lid main body in a surface contact with the upper edge surface of the bathtub. .

[2] An edge protector having a U-shaped cross section is fitted and attached to the periphery of the lid body.
The plate according to the preceding item [1], wherein the heat escape preventing heat-insulating packing is provided in such a manner that the lower surface is positioned along the inner side of the edge protector and substantially in the same plane as the lowermost surface of the edge protector. Shaped bathtub lid.

  [3] The thermal insulation preventing packing for preventing heat escape is made of a closed cell foam synthetic resin material that is separate from the edge protector, and is attached to the lower surface of the lid body [1] or The plate-shaped bathtub lid as described in [2].

  [4] The plate according to [1] or [2] above, wherein the heat-insulating packing for preventing heat escape is constituted by a belt-like extending portion integrally extending from a lower flange portion of the edge protector. Shaped bathtub lid.

  [5] The above [1] to [4], wherein the lid body is formed of a heat insulating laminated plate in which thin metal plates such as aluminum are laminated and integrated on both surfaces of a heat insulating core plate made of a thermoplastic resin foam. The plate-shaped bathtub lid of any one of Claims.

[6] The lid body is configured by a hollow panel in which a hollow portion having a predetermined height is placed between a pair of upper and lower hard surface plates, and a peripheral portion is joined and integrated.
The plate-shaped bathtub lid according to any one of [1] to [4], wherein a heat insulating material made of foamed synthetic resin is loaded in the hollow portion.

[7] One hard surface plate of the pair of hard surface plates is a heat insulating laminated plate in which thin metal plates such as aluminum are laminated and integrated on both surfaces of a heat insulating core plate made of a thermoplastic resin foam. ,
The other hard surface plate is made of a metal plate such as aluminum or a hard synthetic resin plate, and is formed of a shallow box-shaped molded body having a horizontally protruding edge on the periphery,
The plate-shaped bathtub lid according to the preceding item [6], wherein the protruding edge portion of the hard surface plate made of the molded body is overlapped and joined and integrated with a peripheral edge portion of the other hard surface plate.

  In the bathtub lid of the present invention, a belt-like heat-dissipating heat-dissipating packing is attached to the lower surface of the peripheral edge of the plate-like lid main body in an aspect of surface contact with the upper edge surface of the bathtub. In the state where the lid is applied to the bathtub, the band-shaped packing contacts the surface contact state against the upper edge surface of the bathtub, and seals between the lid main body and the air tightly, thereby blocking the flow of internal and external air. In addition, since the packing itself is heat-insulating, it is possible to effectively release heat in the bathtub between the contact surface between the lower surface of the peripheral edge of the lid body and the upper edge surface of the bathtub and the vicinity thereof. Can be prevented. Accordingly, it is possible to provide a bathtub lid that is further excellent in heat retention characteristics. In addition, the packing serves to prevent the bathtub lid from slipping, thereby improving the laying stability and the safety.

  Further, an edge protector having a U-shaped cross section is fitted and attached to the periphery of the lid body, and the heat escape preventing heat insulating packing is disposed along the inner side of the edge protector and the lowermost surface of the edge protector. By providing the lower surface on a substantially same plane, the edge protector can protect the peripheral edge of the plate-like lid body and prevent danger, and also improve the appearance. sell.

  Further, when the heat escape preventing heat insulating packing is made of a closed cell foam synthetic resin material that is separate from the edge protector and is attached to the lower surface of the lid body. The above-mentioned effect of improving the heat retaining property can be enjoyed more satisfactorily by the inherently excellent heat insulating performance of the heat insulating packing.

  In addition, when the heat-insulating packing for preventing heat escape is constituted by a belt-like extending portion integrally extended from the lower flange portion of the edge protector, the edge protector is attached or fitted by injection molding. Since the heat insulating packing can be attached at the same time when the mating is mounted, it is advantageous in manufacturing and can contribute to the reduction of manufacturing cost.

  In addition, when the lid body is composed of a heat insulating laminate in which thin metal plates such as aluminum are laminated and integrated on both surfaces of a heat insulating core plate made of a thermoplastic resin foam, the lid body itself is good. It has excellent heat insulation performance and excellent strength.

  Further, the lid body is constituted by a hollow panel in which a hollow portion having a predetermined height is placed between a pair of upper and lower hard surface plates and a peripheral portion is joined and integrated, and the hollow portion is made of foamed synthetic resin. When the heat insulating material is loaded, the heat insulating performance can be further improved.

  Furthermore, one hard surface plate of the pair of hard surface plates is a heat insulating laminated plate in which metal thin plates such as aluminum are laminated and integrated on both surfaces of a heat insulating core plate made of a thermoplastic resin foam. The other hard surface plate is made of a metal plate such as aluminum or a hard synthetic resin plate, and is formed of a shallow box-shaped molded body having a horizontal projecting edge on the periphery, and the projecting edge of the hard surface plate made of the molded body. When the portion is overlapped and joined and integrated with the peripheral portion of the other hard surface plate, the strength can be further improved and the heat insulating performance can be further improved.

  Next, the plate-shaped bathtub lid according to the present invention will be described in more detail based on the illustrated embodiment.

  1 to 2 show a first embodiment of the present invention.

  The bathtub lid of this illustrated embodiment is formed along a lid body (11) having a substantially flat plate shape, a frame-shaped edge protector (12) fitted to the periphery of the lid body (11), and the edge protector (12). , And a belt-like heat escape prevention heat-insulating packing (13) provided on the lower surface of the lid body in the inner region.

  The lid main body (11) is a combination of a flat lower surface side hard surface plate (14) and a hard surface plate (15) on the upper surface side formed in a shallow tray shape or box shape. (15) It is comprised by the sealing hollow panel which made the hollow part (16) of predetermined height between.

  The hard surface plate (14) on the lower surface side is the same as a lid body constituent member of a conventionally known heat-insulating flat-plate bath lid, and a thermoplastic synthetic resin foam is used as a heat-insulating core plate (14a). And a laminated plate in which metal thin plates (14b) (14c) such as an aluminum plate having a thickness of 0.15 to 0.3 mm are overlapped and joined together. A decorative coating layer (not shown) such as urethane resin is formed on the outer surface of the metal thin plates (14b) and (14c).

  The heat insulating core plate (3a) made of the foam is made of a foamed synthetic resin having a foaming ratio of about 1.5 to 2.0 times made of a thermoplastic resin such as polyethylene resin or polypropylene resin. It is about 3.0 to 4.0 mm.

  On the other hand, the hard surface plate (15) on the upper surface side is made of a hard synthetic resin plate such as an aluminum plate or polypropylene or polystyrene, and has a shallow box shape having a protruding edge portion (15a) protruding horizontally at the peripheral edge portion. It consists of a molded body. Then, the overhang edge (15a) of the molded body is closely adhered to the peripheral edge of the hard surface plate (14) on the lower surface side, and is joined by a fixing means such as adhesion or riveting, so that the inside is predetermined. A hollow panel having a height of the hollow portion (16) is formed.

  The height of the hollow part (16) is set to about 3 to 15 mm. If this is less than 3 mm, the heat insulating property of the bath lid is insufficient. On the other hand, if it is over 15 mm, the thickness of the bath lid becomes excessive and inconvenient in handling due to its bulkiness. A suitable height of the hollow portion (16) is about 5 to 10 mm.

  The said hollow part (16) comprises the main heat insulation function part. Thus, as specific means for imparting the function as the heat insulating function part, a method of loading a lightweight heat insulating material and a method of applying vacuum heat insulation can be considered, and the former is particularly recommended.

  In the bath lid of the illustrated embodiment, the lightweight part (17) is loaded in the hollow part (16).

  As this lightweight heat insulating material (17), in addition to a vacuum heat insulating material in which an airtight bag filled with glass wool is formed in a vacuum, a synthetic resin foam having a high expansion ratio can be used. In the case of the latter foam, a foam having a high foaming ratio of about 5 to 10 times can be suitably used.

  Moreover, the heat insulating material (17) by a foam is good also as what is formed by the injection | pouring foaming of a urethane resin.

  Further, in the method of achieving vacuum insulation, the hollow portion (16) is formed in a complete vacuum or a reduced pressure space. In this case, in order to maintain the space between the upper and lower hard surface plates (14) (15), the hollow portion ( 16) It is good also as what arranges a heat insulating material block partially as a spacer in the inside, or the rib which protruded from at least one of hard surface materials (14) and (15) is applied to the inner surface of the other surface plate. The distance between both surface plates (14) and (15), that is, the height of the hollow portion (16) may be kept constant.

  As the lightweight heat insulating material (17), a synthetic resin foam such as polystyrene, polyethylene, polypropylene, urethane or the like is adopted. In any case, the specific gravity is 0.5 or less, preferably 0.3 or less, more preferably. It is desirable to use 0.2 or less. As a specific example, for example, a polyethylene foam having a 6-fold expansion and a specific gravity of about 0.15 can be suitably used.

  An edge protector (12) is provided along the periphery of the lid body (11) made of the hollow panel.

  The edge protector (12) is molded from a thermoplastic synthetic resin that is compatible with the thermoplastic synthetic resin constituting the core plate (14a) of the lower surface hard surface plate (14) of the lid body (11). That is, for example, an edge protector (12) made from a polyethylene resin or an olefin-based thermoplastic elastomer is used for a polyethylene resin core plate (14a), and a polypropylene resin is used for a polypropylene resin core plate (14a). An edge protector (12) made from resin or olefinic thermoplastic elastomer is employed. Further, as shown in FIG. 1, the edge protector (12) is formed in a substantially U-shape having a groove (18) on the lid main body (11) side in a cross-sectional view, and the peripheral edge of the lid main body (11). It is attached integrally to the lid body (11) in such a manner as to cover the entire part.

  That is, the edge protector (12) is directly and integrally formed by injection molding so that the periphery of the lid body (11) is fitted into the groove (18) over the entire periphery of the lid body (11). Has been. That is, the heat melted in a state where the lid body (11) is positioned and inserted between two upper and lower molds formed along the periphery of the lid body (11), and the upper and lower molds are completely closed. By injecting a plastic synthetic resin, it is integrally formed on the periphery of the lid body (11).

The edge protector (12) is preferably formed of a material having a large slip resistance from the viewpoint of preventing the bathtub lid from slipping when the bathtub lid is placed on the bathtub. It is desirable to use a soft polyethylene resin.

  According to the bathtub lid with an edge protector, the edge protector (12) is made of a thermoplastic synthetic resin that is compatible with the thermoplastic synthetic resin constituting the core plate (14a) of the lid body (11), and is injection-molded. Is formed integrally with the peripheral edge of the lid body (11), and the edge inner surface of the edge protector (12) and the end surface of the core plate (14a) are welded during the formation process, so that the edge protector (12) is formed. And the lid body (11) can be fixed to the lid body (11) at a time, and a bathtub lid with an edge protector can be reasonably manufactured. That is, the productivity of the bathtub lid with an edge protector can be improved. Moreover, since the inner surface of the edge protector (12) and the end surface of the core plate (14a) are welded and integrated, the edge protector (12) is firmly fixed to the periphery of the lid body (11), and is unintentionally. Even when a large external force is applied, the lid body (11) does not come off.

  Further, when a decorative coating layer made of a thermoplastic synthetic resin compatible with the thermoplastic synthetic resin constituting the edge protector (12) is formed on the outer surface of the hard surface plate (14) (15), The edge protector (12) is welded and integrated not only on the end surface of the core plate (14a) but also on the periphery of the hard surface plates (14) and (15), and can be firmly fixed, and the lid body (11). The end face can be watertight.

  In this embodiment, the heat-insulating packing (13) for preventing heat escape is, in this embodiment, a width of 20 to 50 mm made of a synthetic resin foam, for example, a closed-cell foam made of ethylene / vinyl acetate copolymer (EVA), A belt-shaped member having a thickness of 25 to 40 mm, a thickness of 1 to 5 mm, and preferably 2.0 to 3.5 mm is used. And this heat-insulating packing (13) is a mode in which the lower surface is located flush with the lower surface of the peripheral edge of the lid body (11) along the edge protector (12) and in the same plane as the lowermost end surface. Thus, they are arranged over the entire circumference and are integrally bonded and fixed with an appropriate adhesive.

  When the heat-insulating packing (13) is formed of a foam as described above, the lower surface of the packing (13) is edge protector (see FIG. It is good also as what is provided in the aspect which protrudes below slightly from the lower surface of 12). Also in this case, it shall belong to the range of the position in the substantially same plane as the lowermost surface of the edge protector (12) referred to in the present invention.

  The bathtub lid according to the above embodiment is used as a test material of the product of the present invention, and in order to contrast with this, the configuration is the same as that of the above product except that it does not have a heat insulating packing (13) for preventing heat escape. Using the bathtub lid as a comparative test material, a comparative experiment was conducted on the heat retention characteristics of both, and the results shown in Table 1 below were obtained.

  In the above contrast test, about 245 liters of hot water is applied to a heat insulation bath for 1.5 persons (volume: 315 liters), the bath temperature at the start of measurement is set to 45 ° C., and the outside air temperature is 5 The change in bath temperature over time in an atmosphere of ° C. was examined. Here, the measurement point of bath temperature was set in the center part in the tank further 20 cm below the water surface in the tank located 10 cm below the bathtub lid.

  As shown in Table 1 above, the bathtub lid of the product with the heat insulating packing (13) attached has a relatively superior heat retention effect relative to the comparative bathtub lid without the packing. It was confirmed that

  FIG. 3 shows a second embodiment of the present invention.

  In the bathtub lid of this embodiment, the lower flange portion of the edge protector (12) applied to the peripheral edge portion of the lid body (21) is extended inward, and this extending portion is used as a heat insulation for preventing heat escape in a strip shape. The characteristic packing (23) is formed. All other configurations are the same as in the case of the first embodiment, and corresponding portions are denoted by the same reference numerals. In the case of this embodiment, the heat insulating packing (23) is made of the same material as the edge protector (12), and is specifically made of, for example, soft polyethylene.

  FIG. 4 shows a third embodiment of the present invention.

  In the bathtub lid of this embodiment, the lid body (31) is formed of a single material made of the same material as the hard surface plate (14) on the lower surface side of the lid body (11) of the first embodiment shown in FIG. That is, the lid main body (31) is coated on the surface of the heat insulating core plate (14a), the metal thin plates (14b) (14c) such as aluminum laminated on both surfaces thereof, and the surface of the metal thin plate. It is composed of a laminated board composed of a decorative coating layer such as urethane, particularly a heat insulating composite laminated board called an aluminum laminated board.

  Other configurations are all the same as in the case of the first embodiment, and corresponding portions are denoted by the same reference numerals.

  FIG. 5 shows a fourth embodiment of the present invention.

  In the bathtub lid of this embodiment, the lower flange portion of the edge protector (12) applied to the peripheral portion of the lid main body (41) is extended inward, and this strip-shaped extending portion is used to prevent heat escape. The characteristic packing (43) is formed. All other configurations are the same as those of the third embodiment, and corresponding portions are denoted by the same reference numerals. In the case of this embodiment, the heat insulating packing (43) is made of the same material as the edge protector (12), and is specifically made of, for example, soft polyethylene.

  As described above, various embodiments have been shown as application examples of the present invention. However, in any of the embodiments of the present invention, the lower surface of the heat insulating packing is in surface contact with the upper edge surface of the bathtub. Since there is no gap between them, the flow of air inside and outside is reliably blocked, and the heat insulation effect by the packing itself effectively prevents the escape of heat inside the bathtub, and the heat retention effect is achieved. It can be further enhanced.

  The present invention can be similarly applied to a bathtub lid that does not include an edge protector or a bent or curved bathtub lid that matches the three-dimensional shape of the upper edge of the bathtub.

  Moreover, it is sufficient to provide the heat-insulating packing at the peripheral edge of the side that contacts the upper edge surface of the bathtub in the peripheral edge of the lid body, and it is not always necessary to provide it at the entire peripheral edge.

It is sectional drawing of the bathtub lid which concerns on 1st Embodiment of this invention. It is a bottom view of a part of the bathtub lid of FIG. It is sectional drawing of the peripheral part of the bathtub lid which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the peripheral part of the bathtub lid which concerns on the 3rd Embodiment of this invention. It is sectional drawing of the peripheral part of the bathtub lid which concerns on the 4th Embodiment of this invention. It is sectional drawing of the conventional bathtub lid.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Bathtub 10a ... Bath top edge surface 11, 21, 31, 41 ... Lid main body 12 ... Edge protector 13, 23, 43 ... Thermal insulation prevention heat escape packing 14 ... Hard surface board (lower surface side)
14a ... heat insulation core plate 14b, 14c ... metal thin plate 15 ... hard surface plate (upper surface side)
16 ... hollow part 17 ... heat insulating material

Claims (7)

  A plate-like bathtub lid, characterized in that a belt-like heat-dissipating heat-insulating packing is attached to the lower peripheral edge of the plate-like lid body so as to make surface contact with the upper edge surface of the bathtub. An edge protector with a U-shaped cross section is fitted on the periphery of the lid body.
2. The plate shape according to claim 1, wherein the heat escape preventing heat-insulating packing is provided in such a manner that the lower surface is positioned along the inner side of the edge protector and substantially in the same plane as the lowermost surface of the edge protector. Bathtub lid.   The heat-insulating packing for preventing heat escape is made of a closed-cell foamed synthetic resin material that is separate from the edge protector, and is attached to the lower surface of the lid body. Plate-shaped bathtub lid.   The plate-shaped bathtub cover according to claim 1 or 2, wherein the heat-insulating prevention heat-insulating packing is constituted by a belt-like extending portion integrally extending from a lower flange portion of the edge protector.   The said lid | cover main body is comprised by the heat insulating laminated board by which the metal thin plates, such as aluminum, were laminated | stacked and integrated on both surfaces of the heat insulating core board which consists of a thermoplastic resin foam. Plate-shaped bathtub lid. The lid body is composed of a hollow panel in which a hollow portion of a predetermined height is placed between a pair of upper and lower hard surface plates and a peripheral portion is joined and integrated,
The plate-shaped bathtub lid according to any one of claims 1 to 4, wherein a heat insulating material made of foamed synthetic resin is loaded in the hollow portion. One hard surface plate of the pair of hard surface plates is a heat insulating laminated plate in which metal thin plates such as aluminum are laminated and integrated on both surfaces of a heat insulating core plate made of a thermoplastic resin foam,
The other hard surface plate is made of a metal plate such as aluminum or a hard synthetic resin plate, and is formed of a shallow box-shaped molded body having a horizontally protruding edge on the periphery,
The plate-like bathtub lid according to claim 6, wherein the protruding edge portion of the hard surface plate made of the molded body is overlapped and joined and integrated with a peripheral edge portion of the other hard surface plate.

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