JP2006141757A - Heat insulation structure of bath unit and bathtub shutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulation structure of a bath unit, which can secure a sufficient heat insulation capacity even with a small gap between a watertight pan and a bottom surface of a bathtub and a bathtub shutter which can secure the sufficient heat insulation capacity even with the small thickness. <P>SOLUTION: In the heat insulation structure of the bath unit to install the bathtub on the watertight pan, the heat insulation structure is to apply a vacuum heat insulator formed to have a shape to avoid the interference with a bathtub leg section supporting the bathtub on the watertight pan on a bottom surface of the bathtub. Also, the bathtub shutter is equipped with a foam synthetic resin and surface materials to cover the foam synthetic resin and preferably includes a vacuum heat insulator between both the surface materials. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat insulation structure and a bath lid for a unit bath, and more particularly to a heat insulation structure and a bath lid for hot water stored in a bathtub of a full-pan structure unit bath in which a bathtub is installed on a waterproof pan.

  The structure of the unit bus or the system bus is roughly divided into a half structure and a full pan structure. The former is also referred to as a bathtub with a washing area or a bathtub with an integrated washing area, in which a floor of a washing area and a bathtub are integrally formed on a frame, and a wall panel is erected on the rim of the bathtub. In the latter, a bathtub is placed on a waterproof pan laid on the entire floor via a gantry, and a wall panel is also provided on the outer edge of the waterproof pan.

  In the case of a half structure, for example, when installed on the first floor of a detached house, the back of the bathtub is directly exposed to the outside air, and the temperature of hot water in the bathtub tends to decrease. Therefore, conventionally, a countermeasure has been proposed in which a plurality of heat insulating materials formed in accordance with the shape of the back surface of the bathtub are attached to the back surface side of the bathtub to prevent a temperature drop of the hot water inside the bathtub (for example, see Patent Document 1). .)

  On the other hand, in the full pan structure, the back surface of the bathtub forms a closed space together with the waterproof pan, the wall panel, and the bathtub apron and is not directly exposed to the outside air. For this reason, no special measures have been taken for heat insulation measures such as those in the half structure, except for foamed urethane spraying on the back of the bathtub as a cold district specification.

  By the way, various measures are now being studied from the viewpoint of saving resources and energy, or from the viewpoint of reducing the environmental load generated from housing parts. One of the approaches to “energy saving” which is one of such problems is prevention of temperature drop of hot water stored in the bathtub. This not only suppresses the wasteful release of energy, but also reduces excess energy consumption such as chasing and contributes to the reduction of household energy costs.

  Under such circumstances, there has been a demand for a heat insulation structure that does not lower the temperature of hot water stored in a bathtub even in a full-bread structure unit bath.

  By the way, from the viewpoint of barrier-free, recent full-pan unit baths are required to have three requirements to eliminate the step at the entrance and keep the height of the bathtub straddling low while increasing the depth of the bathtub. In order to satisfy this requirement, it is necessary to make the gap between the waterproof pan and the bottom of the bathtub as small as possible.

  On the other hand, since the heat insulation performance of the heat insulating material is proportional to the thickness of the same material, it is necessary to make the gap between the waterproof pan and the bottom of the bathtub as large as possible in order to ensure heat insulation above a certain level. There is a contradiction between ensuring safety and barrier-free.

  In addition, the heat of the hot water stored in the bathtub is dissipated not only from the back of the bathtub, but also from the surface of the hot water stored in the bathtub. It is desirable to have Therefore, a bath lid or the like in which a heat insulating material is included in the outer skin of a plastic has been proposed (see, for example, Patent Document 2).

  However, a problem similar to the problem described above also exists in the bath lid. That is, in order to ensure heat retention beyond a certain level, it is necessary to increase the thickness of the heat insulating material. However, when the thickness is increased, there is a problem that the weight increases and the handling becomes difficult, and the storage place at the time of bathing is also troublesome.

Moreover, the more excellent the heat insulating properties of the bath lid, the more the temperature difference between the front and the back becomes larger, and the conventional bath lid has a problem in that only one side is heated and expanded and warpage occurs. When the bath lid warps, it not only looks bad, but a gap is created between the bathtub and the bath lid, and heat escapes from there.
JP-A-9-28599 Japanese Utility Model Publication No. 56-12089

  The present invention has been made in consideration of the above-described circumstances, and an object of the present invention is to provide a heat insulation structure for a unit bath that can ensure sufficient heat insulation performance even if the gap between the waterproof pan and the bottom of the bathtub is small. is there.

  Another object of the present invention is to provide a bath lid that can secure a sufficient heat retention performance even when the thickness is small and that does not warp.

  In order to solve the above-described problem, the heat insulation structure of the unit bath according to the present invention is the heat insulation structure of the unit bath in which the bathtub is installed on the waterproof pan as described in claim 1. The vacuum heat insulating material formed in the shape which avoided interference with the bathtub leg part which supports this bathtub on the said waterproof pan is stuck.

  Moreover, in order to solve the subject mentioned above, the bath lid which concerns on Claim 2 is equipped with a foaming synthetic resin and the surface material which covers this foaming synthetic resin.

  Preferably, as described in claim 3, the bath lid may further include a vacuum insulator between the surface materials.

The linear expansion coefficient of the surface material is preferably about 3.0 × 10 ⁻⁵ / ° C. or less, as described in claim 4. For example, as described in claim 5, it is a resin material added with 20 to 40% by weight of glass fiber.

  Alternatively, as described in claim 6, the surface material may be formed by laminating two or more layers of polyolefin resin sheets stretched in a uniaxial direction so that the axial directions thereof are orthogonal to each other. As described in claim 7, the polyolefin resin is preferably a polyethylene resin or a polypropylene resin.

  According to the heat insulation structure of the unit bath according to the present invention, an effect of ensuring a sufficient heat insulation performance can be obtained even if the gap between the waterproof pan and the bathtub bottom is small.

  Moreover, according to the bath lid concerning this invention, even if thickness is small, sufficient heat retention performance can be ensured and the effect that it does not warp is acquired.

  An embodiment of a heat insulation structure for a unit bath according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is an exploded perspective view showing an outline of a unit bath 1 having a heat retaining structure according to the present embodiment, and FIG. 2 is a view of the heat retaining structure according to the present embodiment as viewed in a longitudinal section along the short direction of the bathtub. It is.

  As shown in FIG. 1, the unit bus 1 shown in this embodiment includes a waterproof pan 2 integrally formed of a resin material such as FRP, and a wall panel provided around the outer edge of the waterproof pan 2. 8 and a door (not shown) that forms the doorway, a ceiling panel (not shown), and a bathtub 9 are configured as main elements.

  The waterproof pan 2 is partitioned into a washing area 3 and a bathtub mounting portion 4, and a bank portion 5 is erected on the boundary. A washing ground drain 7 is provided at the lowest position of the washing section 3, and a bathtub drain 6 is provided at the lowest position of the bathtub mounting section 4. These are drain drain traps (not shown) installed on the back of the waterproof pan. Connected.

  The wall panel 8 is formed in a plate shape whose surface material facing the inside of the bathroom is strong enough to maintain a flat surface by a backing material or a frame installed on the back side of the wall panel 8. Etc. are connected and installed.

  A bathtub apron 10 that covers the side surface of the bathtub is installed between the front end of the wash rim side rim 9 b of the bathtub 9 and the top of the bank portion 5. An apron heat insulating material 14 is also attached to the back surface of the bathtub apron 10. The apron heat insulating material 14 has rigidity that does not substantially deform even when pressed with a certain amount of pressing force, and is easily compressed and deformed when pressed with the hard heat insulating material 16 attached to the back surface of the bathtub apron 10. It has flexibility and is composed of a soft heat insulating material 17 attached to a surface of the hard heat insulating material 16 facing the bathtub 9 at the time of installation.

  When the bathtub apron 10 is installed at a predetermined position, the soft heat insulating material 17 is formed thicker than a thickness that abuts against a bathtub heat insulating material 20 described later. Therefore, the same thickness may be used from the upper end to the lower end of the soft heat insulating material 17, but it is more reasonable that the lower part of the recess 9 is formed thicker than the upper part where the bathtub 9 swells. The soft heat insulating material 17 is compressed and deformed when pressed, and the bathtub heat insulating material 20 and the apron heat insulating material 14 are prevented from interfering with each other.

  The hard heat insulating material 16 is the same material as the bathtub heat insulating material 20, that is, foamed polypropylene or expanded polystyrene, and the soft heat insulating material 17 is a sponge-like material such as soft urethane foam.

  Note that the soft heat insulating material 17 must be compressed and deformed following the shape of the object to be pressed, but it is a plastic deformation even if it is not an elastic deformation that returns to its original shape when removed. Also good. Further, “hard” and “soft” as used herein are relative values for comparing the two, and do not mean that they have absolute hardness.

  A plate-like bathtub heat insulating material 20 is attached to the rear surface of the bathtub 9 over substantially the entire surface excluding the rear surface of the rim 9b whose upper end is expanded outward. In the present embodiment, the bathtub heat insulating material 20 is roughly divided into side heat insulating materials 22 to 25 and a bottom heat insulating material 21. Although the side heat insulating materials 22-25 are divided | segmented into four parts from workability | operativity of heat insulating material shaping | molding and workability | operativity of attachment, what was shape | molded integrally may be sufficient.

  The side heat insulating materials 22 to 24 are formed of a heat insulating material obtained by foaming a plastic material. Among them, polystyrene foam (EPS) having a magnification of about 20 to 50 times is the most popular foam plastic, has excellent heat insulation properties, is inexpensive and easy to mold, and is suitable as a material for the bathtub heat insulating material 20. In addition, foamed polypropylene (EPP) is suitable as a material for the bathtub heat insulating material 20 because it has excellent properties such as being sticky and not easily cracked. In addition, it has high chemical resistance against oils, organic solvents, detergents, etc., and is easy to mold.

  The surface of the side heat insulating materials 22 to 25 is smoothly finished by polishing, painting, etc. so that the dirt is difficult to adhere, and / or colored with a color in which the dirt is not conspicuous by mixing or painting with coloring agents. It can be.

  The surfaces of the side surface heat insulating materials 22 to 25 facing the back surface of the bathtub 9 are formed in a shape corresponding to the shape of the back surface of the bathtub 9. As shown in FIG. 2, in the upper part where the bathtub 9 expands, particularly in the center in the longitudinal direction of the bathtub 9, the side heat insulating material 24 is directed upward so that the side heat insulating material 24 does not interfere with the bathtub apron 10. It is formed so that it may decrease gradually according to.

  As for the side surface heat insulating materials 22-25 which concern on this embodiment, although the top part is set to the substantially same height as this apron heat insulating material 10a, this is extended to the inside of the rim | limb 9b, and heat retention property is made more reliable. It is also possible.

  As shown in FIG. 3, the bottom heat insulating material 21 is made of a vacuum heat insulating material, and is affixed to the bottom surface of the bathtub 9 while maintaining a certain distance or more so as not to generate a rubbing sound or the like due to interference with the waterproof pan 2. . The vacuum heat insulating material encloses a core material 21c made of hard urethane foam having open cells with an airtight film 21d such as an aluminum corrugated film that hardly allows gas such as air and water vapor to pass through, and the inside thereof is a vacuum pump. After evacuating until almost vacuumed, it was sealed.

  As the core material 21c, in addition to a porous material such as open-celled rigid urethane foam, a powder solidified material such as silica or a fibrous material such as glass wool can be employed. Since this vacuum heat insulating material has a heat insulation performance about 2.5 times that of hard or soft urethane foam, or a resin foam such as EPP or EPS, the distance between the waterproof pan 2 and the bottom of the bathtub 9 is small. Even when only a thin heat insulating material can be used, sufficient heat retention can be ensured.

  Further, as shown in FIG. 2 and FIG. 3, a buffer material 27 formed of a soft heat insulating material such as soft urethane foam is attached to the lower surface of the bottom heat insulating material 21 or is laid on the waterproof pan 2. Also good. This reliably prevents the bottom heat insulating material 21 from coming into direct contact with the waterproof pan 2, and prevents the bottom heat insulating material 21 from being peeled off from the bathtub 9 and falling, and the thickness of the heat insulating material is increased. The heat insulation effect can be improved.

  Also, in order to absorb the deformation of the heat insulating member and the dimensional error, as shown in FIG. 2, the edge portions of the two heat insulating materials to be joined are joined to each other with a half of the plate thickness removed from each other. ing. Thus, a gap is generated between the heat insulating members, and heat is prevented from being dissipated from the gap. It is good also as a tongue and groove joint which carves one side of the edge part of the heat insulating material of 2 sheets to join, and engraves the other to the concave.

  As shown in FIG. 4, the bottom heat insulating material 21 is provided with a notch 21 a for avoiding interference with the support leg 9 a of the bathtub 9 and a notch 21 b for avoiding interference with the bathtub drain 7. . As shown in FIG. 4A, the bottom surface heat insulating material 21 may be a combination of a plurality of vacuum heat insulating materials having a simple shape, and as shown in FIG. The single piece shape | molded in the shape which avoided interference with the part 9a and the bathtub drain port 6 may be sufficient.

  A gap formed between the support leg 9a and the notch 21a of the bathtub 9 and the bathtub drain 7 and the notch 21b is filled with a filler 26 formed of a soft heat insulating material such as soft urethane foam. This soft heat insulating material also has substantially the same heat insulating performance as the hard heat insulating material, and can improve the heat insulating property of the generated gap. Moreover, since the bottom surface heat insulating material 21 does not contact the support leg 9a and the bathtub drainage port 7 directly as described above, it is possible to prevent a noise problem.

  A bath lid 11 is placed on the upper surface of the bathtub 9 when the bathtub is not used. Since the back surface of the bathtub 9 has a heat insulating structure, it is desirable that the bath lid 11 also has a heat insulating property. For example, as shown in FIG. 2, the bath lid 11 is a sandwich in which upper and lower surfaces of a heat insulating material 11b are sandwiched between surface materials 11a. The forehead of the main body is shaped by closing the forehead material 11c such as soft FRP. The heat insulating material 11b is a material filled with hard or soft urethane foam, or a plate-like resin foam such as EPP or EPS.

  When the thermal insulation is good, a temperature difference occurs between the lower surface facing the bathtub 9 and the upper surface facing the bathroom. When the linear expansion coefficient is large, the bath lid warps due to the difference in elongation between the upper and lower surface materials. End up. When the bath lid warps, it not only looks bad, but a gap is created between the bathtub and the bath lid, and heat escapes from there.

For example, if the temperature in the bathroom is 0 ° C and the temperature in the bathtub is 45 ° C, the temperature of the lower surface facing the bath is about 45 ° C, and the temperature of the upper surface facing the bath is about 5 ° C, nearly 40 ° C. There is a temperature difference. Here, when the length of the bath lid is 1,000 mm and the linear expansion coefficient is 3 × 10 ⁻⁵ , the difference in elongation between the upper and lower surface materials is 1.2 mm, which can be said to be a limit that does not cause warp in practice.

When this is studied for aluminum or resin plates that have been conventionally used as a surface material for bath lids, the linear expansion coefficient of aluminum is 2.4 × 10 ⁻⁵ / ° C., which is within the allowable limit. The linear expansion coefficient of ordinary resins such as polypropylene is 5 to 10 × 10 ⁻⁵ / ° C., which exceeds the allowable limit.

  However, the bath lid must be light because it is used by children and the elderly. In this respect, ordinary resins such as ABS and polypropylene have a specific gravity as small as 0.9 to 1.2 and are more advantageous than aluminum having a specific gravity of 2.7. On the other hand, the bath lid is frequently carried, and even if dropped, it must be hard to crack and not easily dent, so a certain level of strength is required. In this respect, aluminum is advantageous.

  Thus, the conventional surface material has advantages and disadvantages. Therefore, in the present invention, instead of these, as the surface material 11a, a resin material added with 20 to 40% by weight of glass fiber, for example, an ABS resin is employed as the surface material. The resin material added with 20 to 40% by weight of the glass fiber has a linear expansion coefficient of approximately 2.8 × 10 −5 and a specific gravity of approximately 1.5, which is within the allowable limits, and is reinforced with glass fiber. Therefore, it satisfies all the conditions such as rigidity and viscosity rather than the resin material alone.

  The heat insulation structure of the unit bath according to the present embodiment is configured as described above. Hereinafter, attachment of the bathtub heat insulating material 20 to the bathtub 9 will be described. FIG. 5 is a view showing a state in which an adhesive is attached to the end face of the bathtub 9, and FIG. 6 is a cross-sectional view of the bathtub 9 to which the bottom heat insulating material 21 and the side heat insulating materials 22 to 25 are attached, FIG. Is a longitudinal sectional view of the same.

  In order to attach the bottom surface heat insulating material 21 and the side surface heat insulating materials 22 to 25 to the surface of the bathtub 9, as shown in FIG. 5, the adhesive 28 and the small temporary adhesive 29 are placed at regular intervals in the bathtub. 9 Stick on the surface. The adhesive 28 is, for example, a silicon caulking agent, and is affixed in the vicinity of both ends of the side surface heat insulating material 23 and in the center in three rows. The temporary adhesive 29 is for holding the bathtub heat insulating material 20 on the surface of the bathtub until the adhesive 28 is dried and cured. For example, a thick double-sided tape or the like is attached to the upper and lower ends of each line of the adhesive 28. Attached.

  In addition, as shown in FIG. 6, between the side heat insulating materials 22-25, in order to absorb the deformation | transformation of a heat insulating material and a dimensional error, the edge part of two heat insulating materials to join is cut off by half each board thickness mutually. They are joined together. Thereby, it is prevented that a space | gap arises between the bathtub heat insulating materials 20, and heat is dissipated from there. Moreover, it is good also as a tongue-and-groove joining which engraves one side of the edge part of the two heat insulating materials to join, and engraves the other in the concave.

  Moreover, the clearance gap between the upper end of the side surface heat insulating materials 22-25 and the bathtub 9 is sealed with a silicon caulking agent, as shown in FIG. Thus, as shown in FIG. 5, the side heat insulating materials 22 to 25 are surrounded by the other side heat insulating materials 22 to 25, the lower end is surrounded by the bottom heat insulating material, and the upper end is surrounded by the adhesive 28. A closed space is formed between the bathtub 9 and the bathtub heat insulating material 20, which becomes a heat insulating air layer, and prevents a temperature drop due to diffusion of warmed air.

  For the small mouth plugging of the upper ends of the side heat insulating materials 22 to 25, instead of silicon caulking, a thin tape-like foamed resin with an adhesive, a foamed polyethylene tape having a magnification of about 30 times (thickness of about 1 to 3 mm), etc. It can also be used and sealed. Alternatively, the temporary adhesive 29 may be provided around the entire upper end of the side heat insulating materials 22 to 25 to close the forehead.

  When the bathtub 9 with the bathtub heat insulating material 20 attached in this way is installed at a predetermined position of the bathtub mounting portion 4, the bathtub apron 10 is then attached. When the bath apron 10 is installed at a predetermined position, the soft heat insulating material 17 is compressed and deformed when pressed against the bath heat insulating material 20, and the bath heat insulating material 20 and the apron heat insulating material 14 interfere with each other. Is prevented, and the space between the bathtub heat insulating material 20 and the apron 10 is filled with the apron heat insulating material.

  Thus, if the soft heat insulating material 17 is used on the surface of the hard heat insulating material 16, the space between the side heat insulating material 24 and the hard heat insulating material 16 can be filled with the heat insulating material even if the side heat insulating material 24 is thin to some extent. And sufficient heat insulation can be secured.

  Next, a second embodiment of the bath lid according to the present invention will be described with reference to FIG.

  As shown in FIG. 8, the bath lid of the present embodiment is basically different from that in the first embodiment in that a vacuum heat insulating material is provided on the surface material 11 a on the bathtub 9 side, and other configurations. Is substantially the same as that of the first embodiment, and the same reference numerals are given and description thereof is omitted.

  The vacuum heat insulating material 11d is the same as the bottom heat insulating material 21, and includes a core material 11d1 and an airtight film 11d2 as main components. Thus, by adopting the vacuum heat insulating material 11d, the thickness can be further reduced while having the same heat insulating performance, so that it is easy to carry and the storage space for bathing can be reduced. it can.

  FIG. 8 is an example in which the vacuum heat insulating material 11d is placed directly on the surface material 11a on the bathtub 9 side and filled with hard urethane foam. Although it is possible to position the vacuum heat insulating material 11d in the middle of the heat insulating material by a method such as sandwiching the vacuum heat insulating material 11d with plate-like EPS, as shown in FIG. The arrangement is preferable because the temperature can be effectively maintained.

In the present embodiment, the surface material 11aA is formed by laminating two or more layers of a polyolefin resin sheet stretched and molded about 10 to 40 times in a uniaxial direction so that the axial directions are orthogonal to each other. Yes. This stretch-molded polyolefin resin sheet has a linear expansion coefficient of 3.0 × 10 ⁻⁵ / ° C. to −1 × 10 ⁻⁵ / ° C., which is very small, so that the axial directions thereof are orthogonal to each other. When laminated, expansion and contraction due to heat can be suppressed to be small both in the vertical direction and in the horizontal direction, and as a result, it is possible to obtain the bath lid 11 that does not warp.

  As the polyolefin resin used here, a high-density polyethylene resin or a polypropylene resin is suitable. Needless to say, the surface material 11aA can be employed in the first embodiment.

  The embodiments described above are for illustrative purposes and do not limit the scope of the invention. Accordingly, those skilled in the art can employ embodiments in which each or all of these elements are replaced by equivalents thereof, and these embodiments are also included in the scope of the present invention.

The disassembled perspective view which shows the outline | summary of embodiment of the heat insulation structure of the unit bath which concerns on this invention. The longitudinal cross-sectional view along the bathtub short direction of the heat retention structure which concerns on this embodiment. The longitudinal cross-sectional view which shows the detail in the bathtub bottom part of the heat retention structure which concerns on this embodiment. It is a figure which shows the shape of the vacuum heat insulating material affixed on the bathtub bottom part, (a) is an example divided | segmented into the several part, (b) is a look-up figure which shows the example formed by the single-piece | unit. The figure which shows the state of the adhesive agent of a bathtub end surface. The cross-sectional view which shows the joining of the horizontal direction between the members of the hard heat insulating material which concerns on this embodiment. The longitudinal cross-sectional view which shows the joining of the same vertical direction. The figure which shows 2nd Embodiment of the bath lid which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Unit bath 2 Waterproofing pan 3 Washing part 4 Bathing part 5 Bank part 6 Bath drain 7 Washing drain 8 Wall panel 9 Bath 9a Support leg 9b Rim 10 Bath apron 11 Bath lid 11a Surface material 11b Plate-shaped heat insulating material 11c Small edge material 11d Vacuum heat insulating material 11d1 Core material 11d2 Airtight film 12 Drain trap 13 Pipe 13A SUS flexible pipe 13B Resin pipe 14 Apron heat insulating material 16 Hard heat insulating material 17 Soft heat insulating material 20 Bathtub heat insulating material 21 Bottom surface heat insulating material 21a, 21b Notch 21c Core material 21d Airtight film 22, 23, 24, 25 Side heat insulating material 26 Filler 27 Buffer material 28 Adhesive 29 Temporary adhesive

Claims (7)

In the heat insulation structure of a unit bath in which a bathtub is installed on a waterproof pan, a vacuum heat insulating material formed in a shape that avoids interference with a bathtub leg that supports the bathtub is pasted on the waterproof pan. Unit bath insulation structure characterized by wearing. A bath lid comprising a foamed synthetic resin and a surface material covering the foamed synthetic resin. The bath lid according to claim 2, wherein the bath lid further includes a vacuum insulator between the surface materials. 4. The bath lid according to claim 2, wherein a linear expansion coefficient of the surface material is approximately 3.0 × 10 ⁻⁵ / ° C. or less. 4. The bath lid according to claim 2, wherein the surface material is a resin material added with 20 to 40% by weight of glass fiber. 4. The bath lid according to claim 2, wherein the surface material is formed by laminating two or more layers of polyolefin resin sheets stretched in a uniaxial direction so that the axial directions thereof are orthogonal to each other. The bath lid according to claim 6, wherein the polyolefin resin is a polyethylene resin or a polypropylene resin.

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