JPH0352476Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to an improvement in the heat retention structure of a bathtub.

[Prior Art] Conventionally, there are the following three types of thermal insulation structures for bathtubs. The first structure covers the outer surface of the bathtub with a foam material by foaming a foamable urethane resin that is sprayed or injected onto the outer surface of the bathtub. The second structure is one in which glass wool is wrapped around the outer surface of the bathtub. The third structure is one in which aluminum foil is closely attached to the outer surface of the bathtub. The fourth structure is a structure in which a preformed foamed urethane resin molded product is fitted and adhered to the outer surface of the bathtub.

[Problems to be solved by the invention] However, the conventional thermal insulation structure of the bathtub has the following drawbacks.

(a) If the outer surface of the bathtub is covered with foam material,
During the process of spraying the foamable urethane resin onto the outer surface of the bathtub, the sprayed particles become dust, so it could only be obtained through a molding process in a very poor working environment. Moreover, the sprayed thickness was not uniform, and uneven thickness sometimes occurred.

(b) The structure in which glass wool is wrapped around the outer surface of the bathtub has the drawback of increasing heat retention costs because glass wool is expensive.

(c) In the case of a structure in which aluminum foil was closely attached to the outer surface of the bathtub, the insulation ability was low because it only prevented radiant heat transfer. Furthermore, it requires a lot of effort such as taping to adhere the aluminum foil to the outer surface of the bathtub, which has the disadvantage of increasing work costs.

(d) In the case of a structure in which a foamed urethane resin molded product is fitted and bonded to the outer surface of the bathtub, the disadvantage is that the heat insulation cost is high because the foamed urethane resin molded product is expensive.

The present invention was created to eliminate the above problems.

[Means for solving the problem] A means for solving the above problem is to arrange a gap-forming support at a suitable location on the outside surface of the bathtub in a structure that keeps the outside of the bathtub warm, and to attach the gap-forming support to the gap-forming support. Cover the outside of the bathtub with a supported heat-shrinkable film,
A heat-insulating air layer is formed between the heat-shrinkable film, which is stretched under heat-shrinking action, and the outer surface of the bathtub.

[Function] The present invention covers the outside of the bathtub with a heat-shrinkable film supported by a gap-forming support, and creates an insulating air layer between the heat-shrinkable film stretched by the heat-shrinking action and the outside surface of the bathtub. As a result, a good heat insulation effect can be obtained. Furthermore, the present invention can provide a heat retaining structure with a simple operation of providing a gap-forming support and heating and tensioning a heat-shrinkable film.

[Description of Examples] Hereinafter, the thermal insulation structure of the bathtub (hereinafter referred to as
The "proposed structure") will be explained based on an embodiment shown in the drawings. FIG. 1 is a cross-sectional view showing an embodiment of the proposed structure. The outside of the bathtub 1 is covered with a heat-shrinkable film 3 supported by 2, 2, . has been formed. The gap forming support 2 is made of an appropriate material such as heat-resistant paperboard, cardboard, synthetic resin, etc., which does not deform during the film heating process described below. The gap forming support 2 has an angular shape as shown in FIG.
A long object such as a hollow columnar object or a lattice-like molded object as shown in FIG. 3 is appropriately selected so as to obtain a support height H (for example, H=10 to 30 mm). The method of attaching the gap forming support 2 to the outer surface 1a of the bathtub is to attach it using a single-sided adhesive tape or double-sided adhesive tape 4 when the gap forming support 2 is a long one as shown in FIG. When the support 2 is a lattice-shaped member shown in FIG. 3, the gap forming support 2 is fitted into the bathtub 1. The heat-shrinkable film 3 is made of a single layer or multiple layers of vinyl chloride resin, polyethylene, polyester, etc., and has an appropriate thickness (for example,
0.3 mm) is used, and if necessary, aluminum or the like is vapor-deposited to increase the emissivity. As shown in FIG. 4, the heat-shrinkable film 3' before heating is shaped into a box having a size that can cover the bathtub 1 in which the gap-forming supports 2, 2, . It is preferable to form it in advance.

Next, the working procedure for obtaining the proposed structure will be explained. As shown in FIG. 2, gap forming supports 2, 2, . . . are attached to appropriate positions on the outer surface of the bathtub 1 using adhesive tape 4. Next, as shown in Figures 4 and 5,
Cover the outside of the bathtub 1 with a heat-shrinkable film 3',
The film 3' is fixed to the bathtub 1 at a proper position using an adhesive tape 4 or the like. Since there are parts of the bathtub 1 where the film 3' cannot be covered, the film 3 is fixed to the bathtub 1 as shown in FIGS. 6A to 6D. Same figure A
1 shows a state in which the film 3' is fixed to the leg part 1b of the bathtub 1, in which the peripheral edge 3'b of the notch 3'a formed in the film 3' is bent outward, and the peripheral edge 3' is bent outward. ’b to the leg 1b with double-sided adhesive tape 4
It is fixed at FIG. 2B shows a state in which a film 3' is fixed to gap forming supports 2, 2 with adhesive tape 4, which are disposed near the legs 1b of the bathtub 1. In the same figure C, an opening periphery 3c of a film 3' is attached to an outer periphery 1d of an opening 1c for pot piping formed in a bathtub 1.
shows a state in which it is fixed with adhesive tape 4. Figure D
1 shows a state in which the opening peripheral part 3'd of the film 3' is fixed to the drainage part 1e formed at the bottom of the bathtub 1, and the packing 7 and the fixing ring 6 are in contact with the bathtub-side flange part 1f. The opening peripheral edge 3'd of the film 3' is sandwiched between the two. Finally, the fifth
A bathtub 1 covered with a heat-shrinkable film 3' shown in the figure is heated to an appropriate temperature in a heating furnace (not shown).
By passing hot air through the film 3' or by directly blowing hot air onto the film 3', the film 3' is thermally contracted into a tensioned film 3, thereby obtaining the heat insulating structure shown in FIG.

[Effects of the invention] As detailed above, the structure of the present invention has the following practical effects.

Since a heat insulating air layer is formed between the outer surface of the bathtub and the film, a good heat insulating effect can be obtained.

Since a heat retaining structure can be obtained by a simple operation consisting of arranging a gap-forming support and heating a heat-shrinkable film, it is possible to work in a working environment that does not generate harmful gases that would extremely deteriorate the working environment.

It becomes possible to use an inexpensive gap-forming support and a heat-shrinkable film, and the work of disposing the gap-forming support and heating the heat-shrinkable film is extremely simple, making it possible to reduce costs.

[Brief explanation of drawings]

The drawings show an embodiment of the heat retaining structure for a bathtub according to the present invention, in which FIG. 1 is a cross-sectional view showing the heat retaining structure, and FIG. 2 is a state in which a gap-forming support is disposed on the outer surface of the bathtub. FIG. 3 is a perspective view of another embodiment in which a gap-forming support is provided on the outer surface of the bathtub, and FIG. 4 is a perspective view of a box-shaped heat-shrinkable film that is fitted around the bathtub. Fig. 5 is a cross-sectional view showing the state before heating the heat-shrinkable film; Figs. 6 A to D show fixing of the film to areas in the bathtub that cannot be covered with film. FIG. DESCRIPTION OF SYMBOLS 1...Bathtub, 2...Gap forming support, 3...Heat-shrinkable film, 4...Adhesive tape.

Claims (1)

[Scope of utility model registration request] In the structure that keeps the outside of the bathtub warm, gap-forming supports are placed at appropriate locations on the outside of the bathtub, and the outside of the bathtub is covered with a heat-shrinkable film supported by the gap-forming supports, so that the heat shrinkage creates tension. A heat-retaining structure for a bathtub characterized by forming an insulating air layer between a heat-shrinkable film and the outer surface of the bathtub.