Bath tank, bathroom, and bath tank drying method

Abstract

In a bath provided with a bath main body made of a sheet material, sufficient waterproofness and durability can be ensured. The bath (10, 210, 310, 510, 610) is provided with a bath main body made of sheets (S1, S2, S3, S4, S5) used for storing hot water in a suspended state. The sheets (S1, S2, S3, S4, S5) have a plurality of layers (a first layer (L1) and a second layer (L2)). Among the plurality of layers (the first layer (L1) and the second layer (L2)), at least one layer (the first layer (L1)) is formed from a water-impermeable material, and the other at least one layer (the second layer (L2)) is formed from a durable material.

Description

Technical Field

[0001] This disclosure relates to a bathtub, a bathroom, and a method for drying a bathtub.

[0002] This application asserts priority based on Japanese Patent Application Nos. 2024-014745, 2024-014746, 2024-014747, 2024-014748, 2024-128836, 2024-128837, and 2024-128837, all filed on February 2, 2024, the entire contents of which are incorporated herein by reference. Background Technology

[0003] Patent Document 1 discloses a conventional bathtub. This bathtub is used in a suspended state. The bathtub is suspended by hanging its upper corners from a suspension component installed in the bathroom. The bathtub accumulates hot water while suspended. The bathtub has a sheet-like body. The sheet is a waterproof sheet made of synthetic fibers or the like. The bathtub body is deformable. With this configuration, the bathtub can deform to fit the bather's body, providing a comfortable bathing experience different from conventional rigid bathtubs made of resin or the like.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2007-260180 Summary of the Invention

[0007] The technical problem that the invention aims to solve

[0008] Such bathtubs also require strength to withstand the weight of hot water or bathers when suspended. In Patent Document 1, a method of adding a core material to the bathtub body was proposed to improve its strength. However, there are concerns that this would complicate the structure of the bathtub body.

[0009] The technical problem to be solved by the bathtub, bathroom and bathtub drying method of the first aspect of the present invention is to ensure sufficient waterproofness and durability in a bathtub with a bathtub body made of sheet material.

[0010] Patent Document 1 describes a bathtub body that is shaped to hold hot water by forming the bottom portion of a waterproof sheet such that its central side is lower than its two ends in a roughly arc-shaped side view. Patent Document 1 does not provide a specific method for forming this shape from the sheet.

[0011] The technical problem that the bathtub and bathroom of the second aspect of the present invention need to solve is that the desired shape can be easily formed in the bathtub having a bathtub body made of sheet material.

[0012] Bathtubs made of sheet material as described above require increased strength in the parts suspended from the suspension components.

[0013] The disclosed third-party bathtub and bathroom are based on the above-mentioned situation, and the technical problem to be solved is to improve the strength of the part suspended from the suspension component.

[0014] The bathtub in Patent Document 1 does not have a structure for draining hot water accumulated in the main body of the bathroom.

[0015] The bathtub and bathroom of the fourth embodiment of this disclosure are made in view of the above-mentioned previous actual situation, and the technical problem to be solved is that the hot water accumulated in the bathtub body can be easily discharged.

[0016] Technical solutions for solving technical problems

[0017] The bathtub of the first aspect of this disclosure comprises a bathtub body made of sheet material for storing hot water in a suspended state, wherein the sheet material forming the bathtub body has multiple layers, at least one of the multiple layers is formed of a non-permeable material, and at least another layer is formed of a durable material.

[0018] The bathroom of the first embodiment disclosed herein has a suspension part for suspending the aforementioned bath tub.

[0019] The first method of this disclosure involves suspending the aforementioned bath tank in a drying suspension unit for drying.

[0020] The bathtub of the second aspect of the present invention comprises a bathtub body made of sheet material for storing hot water in a suspended state, wherein the sheet material forming the bathtub body has a joint portion on the side wall portion for joining the sheet material together.

[0021] The bathroom of the second embodiment disclosed herein has a suspension part for suspending the aforementioned bath tub.

[0022] The present invention provides a third-party bathtub comprising: a bathtub body made of sheet material, which stores hot water for use in a suspended state; a rope disposed along the upper edge of the bathtub body in the suspended state; the bathtub body having a folded-back portion formed by folding back the outer edge of the sheet material constituting the bathtub body; the rope having a loop portion formed by folding back the end of the rope; the loop end of the rope that closes the loop portion being housed inside the folded-back portion; the loop end and the folded-back portion being sewn together by a thread, the thread extending from a first facet of the folded-back portion disposed on one side of the loop end to the loop end and a second facet of the folded-back portion disposed on the other side of the loop end.

[0023] This disclosed third-party bathroom has a suspension component for suspending the bath tub.

[0024] The bathtub of the fourth aspect of the present invention comprises a bathtub body made of sheet material for storing hot water in a suspended state, the bathtub body having a bathtub drain outlet for discharging the stored hot water.

[0025] In the fourth embodiment of the present invention, when the bathroom is in use with the bath tub suspended to store hot water, a bathroom drain outlet is provided on the side of the bathroom floor where the bath tub drain outlet is located. Attached Figure Description

[0026] Figure 1 This is a diagram that roughly represents the bathroom of Embodiment 1, showing the state of the suspended bathtub.

[0027] Figure 2 This is a diagram that roughly represents the bathroom of Embodiment 1, showing the state with the bathtub removed.

[0028] Figure 3 This is a perspective view of the bath tub in Embodiment 1.

[0029] Figure 4 This is an unfolded view of the sheet material according to Embodiment 1.

[0030] Figure 5 This is a diagram illustrating the sheet material used in Embodiment 1.

[0031] Figure 6 This is a diagram used to illustrate the joint of Embodiment 1.

[0032] Figure 7 This is a diagram used to illustrate the folded-back section of Embodiment 1.

[0033] Figure 8 This is a diagram used to illustrate the engaging part of Embodiment 1.

[0034] Figure 9 This is a diagram illustrating the sheet material used in Embodiment 2.

[0035] Figure 10 This is a diagram used to illustrate the joint in Embodiment 3.

[0036] Figure 11 This is a diagram illustrating a sheet (one) of another embodiment.

[0037] Figure 12 This is a diagram illustrating a sheet (second one) for another embodiment.

[0038] Figure 13 This is a diagram illustrating a joint (one) in another embodiment.

[0039] Figure 14 This is a diagram used to illustrate the joint (second one) of other embodiments.

[0040] Figure 15 This is a diagram illustrating a bathtub (one) of another embodiment.

[0041] Figure 16 This is a diagram illustrating a bathtub (second one) of another embodiment.

[0042] Figure 17 This is a diagram illustrating a bathtub (third one) of other embodiments.

[0043] Figure 18 This is a diagram that roughly represents the bathroom of Embodiment 1, showing the state in which the bathtub is drained and dried.

[0044] Figure 19 This is a perspective view of a bathroom that roughly represents the state of the suspended bathtub in Embodiment 4.

[0045] Figure 20 This is a side view of the bathtub.

[0046] Figure 21 This is a partially enlarged perspective view of a bathtub showing how the hanging ring is housed inside the folded-back section within the locking mechanism.

[0047] Figure 22 This is a magnified perspective view of a bathtub showing the state in which the lifting ring and the fold-back section are sewn together by a thread in the locking section.

[0048] Figure 23 This is a partially enlarged perspective view of a bathtub showing the overlapping reinforcing sheet on the outside of the folded-back section in the locking part.

[0049] Figure 24 This is a magnified perspective view of a bathtub showing the state in which the reinforcing sheet and the folded-back section are sewn together by a thread in the locking part.

[0050] Figure 25This is a partially enlarged cross-sectional view of the bathtub, which is roughly represented by the sewing part in the locking section.

[0051] Figure 26 This is a perspective view of a bathroom equipped with the bath tubs of Embodiments 5 and 6.

[0052] Figure 27 This is a top view of a bathroom equipped with the bath tubs of Embodiments 5 and 6.

[0053] Figure 28 This is a perspective view of a bathtub having the drain outlets of embodiments 5 and 6.

[0054] Figure 29 This is a perspective view showing the closed state of the drain plug installed on the main body of the bathtub in Embodiment 5.

[0055] Figure 30 This is a perspective view showing the open state of the drain plug installed on the main body of the bathtub in Embodiment 5.

[0056] Figure 31 This is an exploded perspective view of the drain plug in Embodiment 5.

[0057] Figure 32 This is a perspective view showing the reinforcing member installed on the bathtub body in Embodiment 6.

[0058] Figure 33 This is a perspective view of the fixing component overlapping the reinforcing component of embodiment 6.

[0059] Figure 34 This is a cutaway view of the drain outlet component in Embodiment 6. Detailed Implementation

[0060] First, embodiments of this disclosure are described. Any combination of the following embodiments, without causing contradiction, is also included in the methods of carrying out the invention.

[0061] The bath tub of the first embodiment of the present invention is,

[0062] [1] A bathtub comprising a bathtub body made of sheet material for storing hot water in a suspended state, wherein the sheet material forming the bathtub body has multiple layers, at least one of the multiple layers being formed of a non-permeable material, and at least another layer being formed of a durable material.

[0063] [2] In the bath described in [1] above, the outermost layer of the sheet is made of cloth.

[0064] [3] In the bath of [1] or [2] above, at least one of the multiple layers of the sheet is formed of a material with heat-insulating properties.

[0065] [4] In any of the above [1] to [3] baths, the outermost surface of the sheet is rougher than the innermost surface.

[0066] [5] In any of the above [1] to [4] bathtubs, in the use state, the upper edge of the bathtub body has a folded-back portion that folds back outward.

[0067] [6] In the bathtub described in [5] above, there is a rope for suspending the main body of the bathtub in the use state, and the rope is inserted into the folded part and extends.

[0068] [7] In any of the above [1] to [6], the bathtub has at least 4 engaging parts that are hooked to a suspension part installed in the bathroom.

[0069] [8] The bathroom of the first aspect of this disclosure has a suspension part for suspending the bath tub of any one of [1] to [7] above.

[0070] [9] The bath drying method of the first aspect of this disclosure suspends the bath of any one of [1] to [7] above in a drying suspension part to dry it.

[0071]

[10] In the bath drying method described in [9] above, the drying suspension part is located at a higher position than the suspension part that is suspended when hot water is stored in the bath.

[0072] The bath tub of the second embodiment of the present invention is,

[0073] [1] A bathtub has a bathtub body made of sheet material for storing hot water in a suspended state, wherein the sheet material forming the bathtub body has a joint portion on the side wall for joining the sheet material together.

[0074] [2] In the bathtub described above, when viewed from above in the use state where hot water is stored in the bathtub body, the bathtub body is rectangular, and the joint portion extends in the vertical direction at the center of the side wall portion forming the specified side in the view above.

[0075] [3] In the bathtub described in [1] or [2] above, when viewed from above in the use state where hot water is stored in the bathtub body, the bathtub body is rectangular, and the joint extends in the vertical direction at the center of the side wall portion forming the short side in the view above.

[0076] [4] In any of the above [1] to [3] baths, the joint sandwiches molten heat-fused material between the overlapping sheets.

[0077] [5] In the bath described in [4] above, the joint will be stitched together with the sheets overlapping in a manner that penetrates the heat-fusion material.

[0078] [6] In any of the above [1] to [5] bath tubs, the bath tub body is formed from a single sheet of material.

[0079] [7] In any of the above [1] to [6] baths, the sheet has a cloth and a layer of non-permeable material overlapping the cloth.

[0080] [8] In any of the above [1] to [7] bathtubs, in the use state of storing hot water in the bathtub body, the upper edge of the bathtub body has a folded-back portion that folds back outward, and the sheet material overlapping in the folded-back portion is sewn together.

[0081] [9] The bathroom of the second aspect of the present invention has a suspension part for suspending the bath tub of any one of [1] to [8] above.

[0082] This discloses a third-party bathtub.

[0083] [1] The bathtub body is made of sheet material and is used to store hot water in a suspended state; a rope is arranged along the upper edge of the bathtub body in the suspended state, the bathtub body having a folded-back portion formed by folding back the outer edge of the sheet material constituting the bathtub body, the rope having a loop portion formed by folding back the end of the rope, the loop end of the rope that closes the loop portion being housed inside the folded-back portion, the loop end and the folded-back portion being sewn together by a thread, the thread passing through a first facet of the folded-back portion disposed on one side of the loop end to a second facet of the folded-back portion disposed on the other side of the loop end. With this structure, the loop end and the folded-back portion can be securely fixed, thus increasing the strength of the portion suspended from the suspension components.

[0084] [2] In the bathtub described in [1] above, the pair of ropes constituting the end of the ring may be sewn together with thread. With such a structure, the pair of ropes constituting the end of the ring can be firmly joined together, thus increasing the strength of the ring portion.

[0085] [3] In the bathtub described in [1] or [2] above, the first face and the second face may also be sewn together along the edge of the rope material constituting the end of the ring. With such a structure, the gap between the end of the ring and the edge of the folded-back portion can be reduced, thus making it difficult for water to enter between the end of the ring and the edge of the folded-back portion.

[0086] [4] In any of the above [1] to [3] bathtubs, a reinforcing sheet may be provided that overlaps with the outer side of the folded-back portion. The reinforcing sheet has a first reinforcing portion that overlaps with the first face and a second reinforcing portion that overlaps with the second face. The folded-back portion and the reinforcing sheet are sewn together with thread that extends from the first reinforcing portion through to the first face, the end of the hanging ring, the second face, and the second reinforcing portion. With such a structure, the reinforcing sheet, the folded-back portion, and the end of the hanging ring can be securely fixed, thereby improving the strength of the portion suspended from the suspension component.

[0087] [5] In the bathtub described in [4] above, the first reinforcing part and the second reinforcing part may also be sewn together along the edge of the rope material constituting the end of the lifting ring. With such a structure, the gap between the end of the lifting ring and the edge of the reinforcing sheet can be reduced, thus making it difficult for water to enter between the end of the lifting ring and the edge of the reinforcing sheet.

[0088] [6] The third-party bathroom disclosed herein includes a suspension component for suspending the bathtub as described in any one of [1] to [5]. With this structure, the ends of the hanging rings and the folded-back portion can be securely fixed, thereby increasing the strength of the portion suspended from the suspension component.

[0089] The bath tub of the fourth embodiment of the present invention,

[0090] [1] A bathtub body made of sheet material is provided for storing hot water in a suspended state, the bathtub body having a bathtub drain outlet for discharging the stored hot water. By having a drain outlet on the bathtub body, the hot water stored in the bathtub body can be easily discharged.

[0091] [2] In the bathtub described in [1] above, when the bathtub body is suspended in the bathroom and used to store hot water, the drain outlet of the bathtub is located above the bathroom floor away from the bathroom. Because the drain outlet of the bathtub is located above the bathroom floor away from the bathroom, the water flow will not be weakened or unable to drain due to the drain outlet contacting the bathroom floor, and drainage can be carried out well.

[0092] [3] In the bathtub described in [1] or [2] above, the opening diameter of the bathtub drain outlet is less than 40 mm. Since the opening diameter of the bathtub drain outlet is less than 40 mm, the drainage flow rate of the bathtub drain outlet does not exceed the drainage flow rate of the bathroom drain outlet, and the hot water discharged from the bathtub drain outlet and flowing into the bathroom drain outlet is difficult to diffuse on the bathroom floor.

[0093] [4] In any one of [1] to [3] above, the bathtub drain outlet is provided with a drain plug that can be opened and closed from the inside of the bathtub body. Since the drain plug can be opened and closed from the inside of the bathtub body, it is easy to open the drain plug when draining hot water accumulated in the bathtub body. In particular, even if the bathtub body is suspended near the bathroom wall, and the drain outlet is located at a position where the gap between the bathroom wall and the bathtub is small and the hands of bathers cannot reach it from between the bathroom wall and the bathtub, the drain plug can still be opened and closed from the inside of the bathtub body, thus making it easy to open and close the drain plug.

[0094] [5] In any one of [1] to [4] above, the bathtub body has a through hole constituting the drain outlet of the bathtub, and has a reinforcing member to strengthen the outer edge of the through hole. The bathtub suppresses deformation of the through hole by means of the reinforcing member. Therefore, when the water-conducting member is installed in the through hole, the water-conducting member is difficult to detach from the bathtub body.

[0095] [6] In any one of [1] to [5] above, the bathtub drain outlet comprises: a through hole formed in the bathtub body; and a water-passing component having a water-passing main body inserted into the through hole, wherein the inner diameter of the through hole is smaller than the outer diameter of the water-passing main body. This bathtub can reduce the gap between the through hole and the water-passing component, thus making it less likely for the water-passing component installed in the through hole to detach from the bathtub body.

[0096] [7] The bathroom according to the fourth aspect of this disclosure includes a bathroom floor having a bathroom drain outlet. In the usage state where a bathtub as described in any one of [1] to [6] is suspended and hot water is stored for use, the bathroom drain outlet is located on the side where the bathtub drain outlet is located. This bathroom allows the bathroom drain outlet to be located on the bathroom floor near the bathtub drain outlet, so that hot water discharged from the bathtub drain outlet can flow to the bathroom drain outlet before extending to the bathroom floor.

[0097] [8] The bathroom described in [7] above has an entrance and exit, and the bathroom drain is located on the wall opposite to the entrance and exit. Since hot water discharged from the bathtub drain flows into the bathroom drain formed on the wall opposite to the entrance and exit, water will not splash onto the entrance or wet the people inside the bathroom when hot water is discharged from the bathtub drain. The bathroom has a good aesthetic appearance because it has a bathroom drain on the wall opposite to the entrance and exit.

[0098] <Implementation Method 1>

[0099] The bathtub 10 and bathroom 1 of Embodiment 1, which embodies the bathtub and bathroom of the present disclosure, will be described with reference to the accompanying drawings. Figure 1 and Figure 2As shown, a bathtub 10 is disposed in a bathroom 1. Bathroom 1 is rectangular in shape. Bathroom 1 has walls W1, W2, and W3 and a bathroom floor F. Bathroom 1 surrounds three of the four sides of the bathroom floor F when viewed from above, through walls W1, W2, and W3. On the other side of the bathroom floor F, there is a wall forming an entrance (not shown).

[0100] like Figure 1 and Figure 2 As shown, bathroom 1 is equipped with a shower unit 2. The shower unit 2 is located on wall W1 among walls W1, W2, and W3. The shower unit 2 is positioned on wall W1 near wall W3. The shower unit 2 includes a faucet 3, an overhead shower head 4, and a handheld shower head 5. The faucet 3 is formed as a long, cylindrical strip extending horizontally along the wall surface of wall W1. The faucet 3 is connected to a water supply pipe (not shown) and a hot water pipe within wall W1. The faucet 3 is a mixing faucet. The faucet 3 allows for adjustments to the water flow, temperature adjustment when mixing hot and cold water, water flow control, and flow path switching. In this specification, hot or cold water supplied from the faucet located in the bathroom is referred to as hot water regardless of temperature or mixing ratio. The faucet 3 has a water outlet pipe 3A forming a water outlet. The faucet 3 can select any one of the water outlet pipe 3A, the overhead shower head 4, or the handheld shower head 5 to spray hot water.

[0101] A bathtub 10 is installed in bathroom 1. For example... Figure 1 and Figure 2 As shown, the bathtub 10 is installed on a pair of opposing walls W1 and W2 of the three walls W1, W2, and W3. The bathtub 10 can be easily installed and removed from walls W1 and W2. That is, when the bathroom 1 is used for purposes other than the use of the bathtub 10, it can be removed for use. For example, as... Figure 2 As shown, bathroom 1 can be properly used as a shower room by removing the bath tub 10.

[0102] A pair of walls W1 and W2 each have a suspension member 20. The suspension member 20 corresponds to the suspension part of this disclosure. The suspension member 20 hooks onto the bathtub 10. The suspension member 20 is a hook-shaped member with an upward opening in a J-shape in side view. Figure 1 and Figure 2 As shown, two suspension members 20 on the wall W1 side are arranged horizontally at intervals, positioned below the faucet 3. Two suspension members 20 on the wall W2 side are provided at the same height and intervals as those on the wall W1 side. That is, two suspension members 20 are provided on one side of each pair of walls W1 and W2, for a total of four. Each suspension member 20 suspends the bathtub 10 by hooking onto the hanging ring 41 described later in the bathtub 10.

[0103] like Figure 1 , Figure 2 andFigure 18 As shown, the bathroom 1 has a drying suspension member 21. The drying suspension member 21 corresponds to the drying suspension part of this disclosure. The drying suspension member 21 is a component used to suspend the bathtub 10 when it is not in use, for example, temporarily suspending the bathtub 10 after use for dehydration or drying. A pair of drying suspension members 21 are provided on the wall W2. The drying suspension members 21 are positioned above the suspension member 20, at a height that is reachable even by an average adult woman, and at a height that prevents the suspended bathtub 10 from contacting the bathroom floor F. Specifically, the drying suspension member 21 is positioned at a height of approximately 1700 mm from the bathroom floor F.

[0104] The bathtub 10 is easily installed on a pair of walls W1 and W2. The bathtub 10 deforms to hold hot water. The bathtub 10 can freely change its shape, such as folded or unfolded. The bathtub 10 holds hot water in its unfolded state. The bathtub 10 is boat-shaped when suspended in its use state.

[0105] like Figure 3 As shown, the bathtub 10 is configured with a bathtub body 30 and ropes 40. The bathtub body 30 stores hot water. The bathtub body 30 is made of sheet material. The bathtub body 30 is rectangular in top view when in use. The upper edge of the bathtub body 30 opens upwards when in use. The bathtub body 30 gradually widens from the bottom to the top when in use.

[0106] like Figure 3 As shown, the bathtub body 30 has four sidewall portions 30A, 30B, 30C, and 30D, representing the first to fourth sidewall portions. The first sidewall portion 30A and the second sidewall portion 30B extend downwards from opposite long sides when viewed from above. The third sidewall portion 30C and the fourth sidewall portion 30D extend downwards from opposite short sides when viewed from above. The end edges of the third sidewall portion 30C and the fourth sidewall portion 30D are continuous with the end edges of the first sidewall portion 30A and the second sidewall portion 30B.

[0107] The main body of the bathtub 30 is made of sheet S1. For example... Figure 4 As shown, sheet S1 is integrally cut from a single sheet into a specified shape. The bathtub body 30 is formed by... Figure 4 The sheet S1 shown is formed by joining the joining sheet portions J to each other and simultaneously folding back the folded-back sheet T. The joining sheet portions J form the joining portion 31, which will be described later, by joining. The folded-back sheet T forms the folded-back portion 32, which will be described later, by folding back and sewing. The sheet constituting the sheet S1 is soft and deformable, and has excellent durability against external physical and mechanical influences, especially tensile forces, as well as excellent impermeability (waterproofness). The sheet constituting the sheet S1 lacks elasticity and maintains a boat-shaped form to a certain extent when hot water is accumulated.

[0108] Specifically, sheet S1 is composed of multiple overlapping layers. For example... Figure 5 As shown, sheet S1 has two layers: a first layer L1 and a second layer L2. Sheet S1 is cut from a sheet formed by bonding the first layer L1 and the second layer L2 together using adhesive A. The first layer L1 ensures water impermeability. The second layer L2 ensures durability. The first layer L1 is positioned inside the bath 10 compared to the second layer L2. Specifically, in the two-layer sheet S1, the first layer L1 is located on the innermost side, and the second layer L2 is located on the outermost side.

[0109] In sheet S1, the first layer L1 is a thin film layer made of resin or the like. Specifically, the first layer L1 is a polyurethane (PU) film. The smooth surface of this first layer L1 is exposed on the inner surface of the bath tub body 30. In sheet S1, the second layer L2 is a fabric or similar material. The second layer L2 is a fabric made of polyester resin fibers, specifically polyethylene terephthalate (PET) fibers. PET fibers are excellent in terms of water resistance, heat resistance, and chemical resistance. The fabric structure of the second layer L2 is a plain weave, which has excellent strength and durability among various fabric structures. The surface of the second layer L2 fabric in sheet S1 is exposed on the outer surface of the bath tub body 30. That is, the plain weave fabric surface of the second layer L2 is exposed on the outer surface of the bath tub 10, and the PU film surface of the first layer L1 is exposed on the inner surface. In sheet S1, the outermost surface, i.e. the fabric surface of the second layer L2, is rougher than the innermost surface, i.e. the surface of the first layer L1.

[0110] like Figure 3 As shown, the bathtub body 30 has a joining portion 31 and a folded-back portion 32. The joining portion 31 joins the sheets S1 together. The joining portion 31 is a joining sheet portion J provided at the edge of the cut sheet S1 (see reference). Figure 4 The bathtub body 30 consists of parts that join together. A joint 31 is formed on the side wall of the bathtub body 30. Specifically, the joint 31 is formed on the side wall portions 30C and 30D, which are rectangular in shape, among the four side wall portions 30A, 30B, 30C, and 30D of the bathtub body 30. The joint 31 extends vertically from the center of the side wall portion 30C or 30D in the direction of its extension. The bathtub 10 achieves a boat-shaped form by providing such a joint 31.

[0111] like Figure 6As shown, the joint 31 is formed by thermally fusing two overlapping joint sheet portions J with the thermal fusion bonding material H sandwiched in between. In the joint 31, the two joint sheet portions J are each bent into a U-shaped cross section and interlock with each other. The joint 31 has a first weld portion H1 for fusing the first layer L1 of sheet S1 to each other, a second weld portion H2 for fusing the second layer L2 to each other, and a third weld portion H3 for fusing the first layer L1 and the second layer L2. The first weld portion H1 and the second weld portion H2 are joints of the same raw materials, and are welded using a thermal fusion bonding material H suitable for fusing each raw material to each other. In this embodiment, the first layer L1 is a PU film, and the second layer L2 is a PET fabric. Therefore, the thermal fusion bonding materials H used for the first weld portion H1 and the second weld portion H2 are preferably, for example, PU-based and polyester-based thermal fusion bonding materials, respectively. Regarding the third weld section H3, it involves fusing different raw materials together, and a welding material selected considering the properties of both raw materials is used for welding. In this embodiment, the third weld section H3 is formed using the same heat fusion material H used in the second weld section H2. It should be noted that the heat fusion material used for the third weld section can be the same as the heat fusion material used for the first weld section, or it can be a different heat fusion material than the heat fusion materials used for the first and second weld sections, respectively.

[0112] The folded-back portion 32 is a form in which the outer edge of the sheet S1 forming the bathtub body 30 is folded back and overlapped. The folded-back portion 32 maintains the overlap by sewing the folded-back sheets S1 together. Figure 3 As shown, the folded-back portion 32 is formed on approximately the entire circumference of the outer edge of the upper edge of the bathtub body 30 in the use state. The folded-back portion 32 folds back to form a double structure, and therefore also functions as a reinforcement in the upper edge of the bathtub body 30.

[0113] like Figure 3 As shown, the fold-back portion 32 has a wide portion 32A and an insertion portion 32B. The wide portion 32A is provided in the bathtub body 30, which is rectangular in top view, at the four corners corresponding to the rectangular shape. The wide portion 32A is formed to be wider than other portions by setting a larger fold-back amount. The insertion portion 32B is the fold-back portion 32 of the fold-back portion 32, which is the portion corresponding to the long side of the rectangular shape in the bathtub body 30 when viewed from above. Figure 7 As shown, the insertion part 32B is cylindrical, with a rope 40 inserted inside. The insertion part 32B, together with the wide portions 32A at both ends, is formed by a series of folded sheets T. The cylindrical space inside the insertion part 32B is connected to the inner space of the wide portions 32A at both ends. The rope 40 inside the insertion part 32B extends to the wide portions 32A at both ends.

[0114] Rope 40 suspends the main body 30 of the bathtub 10 when it is in use. For example... Figure 3 As shown, the rope 40 is disposed on the upper edges of the side wall portions 30A and 30B, which correspond to the long sides, of the side wall portions 30A and 30B of the rectangular bathtub body 30 (viewed from above). That is, the bathtub body 30 is suspended from the upper edges of the two opposing side wall portions 30A and 30B by the rope 40 when the bathtub 10 is in its installed state. The rope 40 is inserted into the wide portion 32A and the insertion portion 32B of the folded-back portion 32 of the bathtub body 30. The rope 40 extends continuously from the wide portion 32A on one end to the wide portion 32A on the other end. Therefore, when suspending the bathtub body 30, the rope 40 also functions as a reinforcement to strengthen the upper edge of the bathtub body 30. Figure 8 As shown, the rope 40 has a loop portion 41. The loop portion 41 corresponds to the engaging portion of this disclosure. The loop portion 41 is provided at both ends of the rope 40. The loop portion 41 causes the rope 40 to extend outward in a loop shape from the wide portion 32A, and causes the end to return into the wide portion 32A and be fixed to the wide portion 32A.

[0115] When suspended from rope 40, the bathtub body 30 has a boat shape with a central portion concave downwards. The upper edge of the bathtub body 30 opens upwards. The bathtub body 30 in its operating state is a boat shape that gradually widens from bottom to top. When hot water is stored, the lower surface of the central portion of the bathtub body 30 contacts the bathroom floor F of the bathroom 1. Therefore, when filled with hot water, the bathtub 10 can support most of the load on the bathroom floor F. Thus, compared to the case where the bathtub 10 is only supported by walls, the reinforcement structure of walls W1 and W2 can be simplified.

[0116] like Figure 1 As shown, the hanging ring 41, which serves as the engaging part, is hooked onto the suspension member 20 installed on the walls W1 and W2. The hanging ring 41 is located on the upper edge of the bathtub 10. Specifically, as... Figure 3 As shown, the hanging rings 41 are located at the four corners of the rectangular bathtub body 30 in top view. The bathtub body 30 is suspended from the suspension member 20 by ropes 40 that hook the hanging rings 41 to the suspension member 20. The bathtub 10 can be easily installed on the walls W1 and W2 by hooking the hanging rings 41 to the suspension member 20.

[0117] The function and effect of the bathtub 10 and bathroom 1 with the above-described structure will be explained. The bathtub 10 is easily installed on the walls W1 and W2 of the bathroom 1. Therefore, the bathtub 10 can be installed and stored very easily. During installation, the bathtub 10 can be easily installed by hooking the four hanging rings 41, which serve as the locking parts, to the suspension members 20 on the walls W1 and W2. The bathtub 10 is suspended from the suspension members 20, and in this state, hot water is stored within the bathtub body 30 for use.

[0118] A rope 40 is inserted into the insertion portion 32B of the folded-back portion 32 at the upper edge of the bathtub body 30 in the bathtub 10. The rope 40 has a hanging loop portion 41 as a locking part. The rope 40 is supported at both ends of the hanging loop portion 41 between the suspension members 20 of each wall W1, W2. The bathtub body 30 distributes the load and suspends it along approximately the entire length of the extension direction of the rope 40. Therefore, the bathtub 10 can suppress the deviation of local load during suspension relative to the sheet S1 forming the bathtub body 30.

[0119] The folded-back portion 32 is maintained in its folded-back state by sewing. The folded-back portion 32 is located at the upper end of the bathtub body 30 in its used state. Normally, the water level of the hot water in the bathtub body 30 in its used state is located lower than the upper end of the bathtub body 30. Therefore, the folded-back portion 32 does not require the same strict impermeability as the joint portion 31; it only needs to maintain its folded-back state. Therefore, using sewing to maintain the folded-back portion 32 provides a simple and practical way to maintain its folded-back state. The sewn folded-back portion 32 allows for a stitched appearance design on the upper edge of the bathtub body 30.

[0120] When the bathtub 10 is in use, the fold-back portion 32 is formed by folding back the upper edge of the bathtub body 30 outwards. With this fold-back portion 32, the inner surface of the bathtub body 30 is composed only of the surface of the first layer L1. This first layer L1 is made of PU film and is a layer that ensures water impermeability within the bathtub body 30. Therefore, the fold-back portion 32 is advantageous from a waterproofing perspective.

[0121] For example, when the structure is a folded-back section that bends inward towards the inside of the bathtub body, the surface of the layer constituting the outer side of the bathtub body is exposed inside the bathtub body. In this case, if the outer side of the bathtub body is made of a fabric such as the second layer L2 of this embodiment, water can easily seep into the woven fabric or the gaps between the woven fabric due to hot water droplets. In contrast, when the folded-back section 32 is in the form of folding back outward, since the surface of the second layer L2 is not exposed inside the bathtub body 30, it is possible to suppress the contact between hot water and the second layer L2, and this situation is less likely to occur.

[0122] When the bathtub 10 is in use, the folded-back portion 32 is folded back outward from the upper edge of the bathtub body 30, resulting in excellent appearance design. That is, since the folded-back portion 32 is folded back outward, no step difference occurs on the inner surface of the bathtub body 30 that would occur when bending inward.

[0123] To collect hot water in the bathtub 10, a faucet 3 in the shower unit 2 is used. The faucet 3 can spray hot water from any one of the water outlet pipe 3A, the overhead shower head 4, and the handheld shower head 5. The bather in the bathtub 10 can collect hot water from the water outlet pipe 3A, or collect hot water from either the overhead shower head 4 or the handheld shower head 5. Because the bathtub 10 is deformable, it can be shaped to fit the body of the bather. Therefore, compared to a non-deformable bathtub, the bathtub 10 only needs to collect a smaller amount of hot water. In the bathtub 10, the inner surface of the bathtub body 30 is the surface of the first layer L1 made of PU film. The surface of this PU film is smooth, thus providing good skin feel and cleaning properties.

[0124] In the bathtub 10, the sheet S1 forming the bathtub body 30 has a first layer L1 and a second layer L2 as multiple layers. The first layer L1 is formed of a PU film, which is a non-permeable material. The second layer L2 is formed of a fabric composed of PET fibers, which is a durable material. Therefore, the bathtub 10 can easily balance suspension strength and waterproofness. For example, if the bathtub is made of a single-layer sheet, the raw materials used to form that single layer are limited in terms of both non-permeability and durability. In contrast, in the bathtub 10, a PU film is selected as the sheet S1 forming the bathtub body 30 to ensure non-permeability, and a fabric made of PET fibers is selected to ensure durability. In this way, by making the sheet S1 constituting the bathtub body 30 into a multi-layer structure, the bathtub 10 can select different materials for non-permeability and durability respectively, and use both.

[0125] When hot water is stored, the force generated by the water pressure acts on all parts of the bathtub 10. This water pressure causes the bathtub 10 to deform, and the bathtub body 30 and the ropes 40 become taut. In particular, the ropes 40, which are strung between the walls W1 and W2 at the upper edge, are firmly taut to the point that even placing a hand on them will not cause significant swaying. Therefore, while the bathtub 10 can deform freely, it also suppresses deformation by storing hot water, maintaining a stable shape even when bathers enter and exit the bathtub 10.

[0126] The bathtub 10 has a joint 31 for joining the sheets S1 together. The joint 31 is joined by heat-fusion joints H1, H2, and H3 formed by heat-fusion bonding the sheets S1 together using a heat-fusion bonding material H. The joint 31 is joined by interlocking the joining sheets J bent into a U-shaped cross-section, thereby utilizing three heat-fusion joints H1, H2, and H3. Therefore, the bathtub body 30 can ensure sufficient strength and sufficient waterproofness of the joint 31.

[0127] The joint 31 extends vertically along the center of the sidewall portions 30C and 30D in the rectangular bathtub body 30 when viewed from above. The bathtub body 30 has a well-symmetrical shape on both sides bounded by the joint 31. By arranging the joint 31 to extend vertically along the center of the sidewall portions 30C and 30D, the bathtub body 30 can achieve a good material yield. In other words, by arranging the joint 31 relative to the bathtub body 30 in this way, the size of the unfolded state of the sheet S1 forming the bathtub body 30 can be suppressed when forming the symmetrical boat-shaped bathtub body 30.

[0128] For example, consider a bathtub body with a shape approximately the same as the bathtub body 30. In this bathtub body, with the joint positioned offset from the center of the side wall portion of the bathtub body, the unfolded shape of the sheet forming the bathtub body is asymmetrical. In contrast, in the case of the bathtub body 30, by employing a structure where the joint 31 is positioned at the center of the side wall portions 30C and 30D, the unfolded shape of the sheet S1 can also be symmetrical (see reference). Figure 4 Therefore, compared to the case where a bathtub body is formed from an asymmetrical sheet, the size of the bathtub body 30 in the unfolded state is suppressed, and a good material yield can be achieved.

[0129] When the bathtub 10 is filled with hot water, the lower surface of its central portion contacts the bathroom floor F. Thus, by the contact between the lower surface of the bathtub 10 and the bathroom floor F, the weight of the hot water stored in the bathtub 10 or the weight of the bather is appropriately supported by the bathroom floor F. Therefore, the bathtub 10 can prevent excessive load from being applied to the various parts of the bathtub 10 that are suspended, such as the suspension components 20, the hanging rings 41, the ropes 40, and the insertion parts 32B. Compared to a structure where the bathtub is supported only by the upper edge, the structure of the suspension support in the bathroom 1 can be simplified in terms of strength. Specifically, the structure of the bathroom 1 side, such as the suspension components 20 and the walls W1 and W2, and the structure of the bathtub body 30 and the ropes 40, can be simplified in terms of strength.

[0130] After bathing, the hot water accumulated in the bathtub 10 is removed, and it is detached from the walls W1 and W2. The bathtub 10 can be easily removed by detaching the hanging ring 41, which serves as the locking part, from the suspension member 20. The removed bathtub 10 is then washed, dried, folded, and stored. Because the bathtub 10 is easily assembled and disassembled, unlike conventional fixed bathtubs, its entire interior and exterior can be cleaned. The bathtub 10, with the hot water removed, can be easily deformed into a folded state after being removed from the walls W1 and W2, or a rolled-up state. The bathtub 10 can be easily deformed into a shape suitable for storage.

[0131] When dewatering and drying the bath tub 10, use the drying suspension component 21 (see reference). Figure 1 , Figure 18 (etc.). The drying suspension component 21 is installed on the wall W2 at a position higher than the suspension component 20, at a height that is within reach even for an average adult woman, and at a height that prevents the suspended bathtub 10 from contacting the bathroom floor F. The bathroom 1 can easily dry the bathtub 10 without having to take it outside the bathroom 1.

[0132] like Figure 2 As shown, bathroom 1, with the bathtub 10 removed, can be used as a shower room for showering. Without the bathtub 10 installed, bathroom 1 can be used entirely on the bathroom floor F for showering. Bathroom 1 can be used for showering using at least one of the overhead shower head 4 and the handheld shower head 5 from the shower unit 2. When showering with the bathtub 10 removed, no foam or water adheres to the bathtub 10. Therefore, bathroom 1 is easy to clean after showering.

[0133] Because the bathtub 10 is made of sheet material, it is easier and cheaper to manufacture compared to conventional bathtubs made of FRP or similar materials. Therefore, it is also easier to set up a dedicated bathtub for each user. In this case, the size and design of the bathtub 10 can be freely set according to each user. Compared to existing fixed bathtubs made of FRP or similar materials, the bathtub 10 has advantages in terms of transportation costs and recyclability. Therefore, the bathtub 10 can reduce environmental load. It is also easier for a single user to own multiple bathtubs 10. In this case, the user can choose the desired bathtub from multiple bathtubs 10 based on mood, season, etc., just like choosing clothes.

[0134] As described above, the bathtub 10 of Embodiment 1 includes a bathtub body 30 made of a sheet S1 used to store hot water in a suspended state. The sheet S1 forming the bathtub body 30 has a first layer L1 and a second layer L2 as multiple layers. The first layer L1 is composed of a PU film, which is a non-permeable material. The second layer L2 is composed of a woven fabric made of PET fibers, which is a durable material. With this structure, the bathtub 10 can use sheet S1 made of materials that are both excellent in terms of waterproofness and durability. As a result, compared with the case where the sheet S1 is composed of a single layer, the bathtub 10 can easily ensure both suspension strength and waterproofness, and can easily achieve a bathtub body 30 with good waterproofness and durability.

[0135] In the bathtub 10, the outermost layer of the sheet S1 forming the bathtub body 30 is made of fabric. Therefore, the bathtub 10 can become a bathtub body 30 with a good appearance design. That is, by making the outermost layer of fabric, a bathtub body 30 with a fabric-like appearance can be formed, giving the bathtub 10 a good appearance design.

[0136] In the bath tub 10, the outermost surface of the sheet S1 forming the bath tub body 30, which is the PU film, is rough compared to the innermost surface. Therefore, compared to the case where the outer surface of the bath tub 10 is only smooth, it can be given the texture of a rough surface, which can improve the appearance design of the outer surface of the bath tub body 30.

[0137] In the bathtub 10, the upper edge of the bathtub body 30 in the use state has a folded-back portion 32 that folds back outwards. Therefore, the bathtub 10 can be configured such that only the surface of the first layer L1, which ensures water impermeability, is exposed on the inner surface of the bathtub body 30, which is beneficial for ensuring waterproofing. Since the folded-back portion 32 is folded back outwards, it can create a structure on the inner surface of the bathtub body 30 that does not produce a step difference as would occur when bending inwards. By providing the folded-back portion 32 at the upper edge, the bathtub 10 can ensure strength when suspending the bathtub body 30 from the upper edge. The sheets S1 overlapped at the folded-back portion 32 are sewn together. Therefore, the bathtub 10 can achieve a good aesthetic design through sewing in the folded-back portion 32 at the upper edge of the bathtub body 30.

[0138] The bathtub 10 is equipped with a rope 40 for suspending the bathtub body 30 during use. The rope 40 extends by inserting into the fold-back portion 32. Therefore, the bathtub 10 can effectively support the load borne by the stored hot water and the load borne by the bather leaning against the inner surface of the bathtub 10 when suspended by the rope 40. Since the rope 40 extends by inserting into the fold-back portion 32 at the upper edge of the bathtub body 30, the load on the bathtub body 30 can be effectively distributed in the direction of extension of the rope 40.

[0139] The bathtub 10 has four hanging rings 41 that hook onto the suspension components 20 on one side of the bathroom 1. The hanging rings 41 correspond to the engaging parts of this disclosure. Therefore, the bathtub 10 can effectively distribute the accumulated hot water or the weight of the bather from the four hanging rings 41 and support it on the walls W1 and W2. The lower central surface of the bathtub body 30 contacts the bathroom floor F of the bathroom 1. Therefore, the bathtub 10 can also bear the load on the bathroom floor F of the bathroom 1, reducing the load applied to the walls W1 and W2.

[0140] The bathroom 1 in Embodiment 1 includes a suspension member 20 for suspending the bathtub 10. Therefore, the bathroom 1 can create more space by removing the bathtub 10, for example, when showering. That is, the bathroom 1 can install the bathtub 10 only when needed and remove it when not needed. Therefore, when the bathroom 1 is used for purposes other than using the bathtub 10, removing the bathtub 10 allows for efficient use of space, comparable to not having the bathtub 10 at all.

[0141] As described above, the bathtub 10 of Embodiment 1 includes a bathtub body 30 made of sheet S1 for storing hot water in a suspended state. The bathtub body 30 has a joint 31. The joint 31 is formed by joining the sheets S1 together. The joint 31 is provided on the side wall portions 30C and 30D of the bathtub body 30. The bathtub body 30 can be easily formed into a desired shape by having the joint 31.

[0142] In the bathtub 10, the bathtub body 30 in its use state is rectangular when viewed from above. The joint 31 extends vertically along the center of the sidewall portions 30C and 30D, which form sides corresponding to the shorter sides of the rectangle in the bathtub body 30. With this joint 31, the bathtub 10 can be a boat-shaped bathtub body 30 symmetrical about the joint 31. By providing the joint 31 in such a way that it extends vertically along the center of the side, the bathtub 10 can form sheet S1 with a good sheet yield.

[0143] In the bath tub 10, the joint 31 has heat-fusion portions H1, H2, and H3 formed by sandwiching heat-fusion material H between overlapping sheets S1. Therefore, the bath tub 10 can ensure sufficient strength and waterproofness of the joint 31 in the bath tub body 30.

[0144] In the bathtub 10, the sheet S1 forming the bathtub body 30 has a second layer L2 made of PET fiber fabric, and a first layer L1 made of PU film, which is a non-permeable material, overlaid on the first layer L1. In the bathtub 10, the inner surface of the bathtub body 30 is the surface of the first layer L1 made of PU film and is a smooth surface, so the skin feels good when bathing.

[0145] In the bathtub 10, the sheet S1 that forms the bathtub body 30 is formed from a single sheet S1. Specifically, the sheet S1 is integrally cut from a single sheet into a predetermined shape. Therefore, compared to a bathtub body formed by joining multiple sheet-like parts cut from a sheet, the bathtub 10 can reduce the number of joints formed, and the bathtub body 30 can be easily obtained.

[0146] In the bathtub 10, the upper edge of the bathtub body 30 in the use state has a folded-back portion 32 that folds back outwards. Therefore, the bathtub 10 can be configured such that only the surface of the first layer L1, which ensures water impermeability, is exposed on the inner surface of the bathtub body 30, which is beneficial for ensuring waterproofness. Since the folded-back portion 32 is folded back outwards, it can achieve a structure that does not produce a step difference on the inner surface of the bathtub body 30 as would occur when bending inwards. By providing the folded-back portion 32 at the upper edge, the bathtub 10 can ensure strength when suspending the bathtub body 30 from the upper edge. The sheets S1 overlapped at the folded-back portion 32 are sewn together. Therefore, the bathtub 10 can achieve a good appearance design through sewing in the folded-back portion 32 at the upper edge of the bathtub body 30.

[0147] The bathtub drying method of Embodiment 1 suspends the bathtub 10 in the drying suspension member 21 to dry it. Therefore, the bathtub drying method can easily remove water and dry the bathtub 10 without taking it outside the bathroom 1.

[0148] In the bathtub drying method, the drying suspension member 21 is positioned above the suspension member 20 that is suspended when hot water is stored in the bathtub 10. Therefore, it can be suspended at a height that does not contact the bathroom floor F, thus enabling the bathtub drying method to remove water and dry the bathtub 10.

[0149] <Implementation Method 2>

[0150] Reference Figure 9 The bath tub of Embodiment 2, which embodies the bath tub of this disclosure, will be described. The bath tub of Embodiment 2 has a bath tub body formed of sheet S2. Sheet S2, like sheet S1 of Embodiment 1, has multiple layers. Sheet S2 differs from sheet S1 in the composition of its multiple layers. The bath tub of Embodiment 2 has the same structure as the bath tub 10 of Embodiment 1 in other respects. In the following description, the same reference numerals are used to refer to structures identical to those of Embodiment 1, and repeated descriptions are omitted.

[0151] like Figure 9As shown, sheet S2, in addition to the first layer L1 and the second layer L2, also has a third layer L3. The third layer L3 is a heat-insulating layer. In this embodiment, the third layer L3 is a foamed resin layer formed by foaming resins such as PU and polyethylene (PE). The third layer L3 is disposed between the first layer L1 and the second layer L2. The bathtub body of sheet S2 with the above structure can suppress the temperature drop of the accumulated hot water. Compared with conventional bathtubs made of FRP, sheet-made bathtub bodies may easily cool the accumulated hot water. Therefore, by using sheet S2 with a third layer L3 composed of foamed resin as the sheet forming the bathtub body, a heat-insulating function can be given to the sheet-made bathtub body.

[0152] <Implementation Method 3>

[0153] Reference Figure 10 The bath tub of Embodiment 3, which embodies the present invention, will be described. The bath tub of Embodiment 3 includes a bath tub body having a joint portion 231. The joint portion 231 joins sheets to each other on the side wall portion of the bath tub body, which is the same as the joint portion 31 of Embodiment 1. The joint portion 231 differs from the joint portion 31 in the joining method of the sheets to each other. The bath tub of Embodiment 3 is otherwise identical in structure to the bath tub 10 of Embodiment 1. In the following description, the same reference numerals are used to refer to structures identical to those in Embodiment 1, and repeated descriptions are omitted.

[0154] like Figure 10 As shown, the joint 231 is a combination of heat fusion and stitching. The joint 231 interlocks the U-shaped joint sheet portions J, forming heat fusion portions H1, H2, and H3 based on the heat fusion material H, similar to Embodiment 1 described above. Furthermore, the joint 231 is constructed by stitching the overlapping sheets together using a sewing thread Th. This joint 231 further enhances the joint strength.

[0155] It should be noted that, as the formation sequence of the joint 231, it is preferable to sandwich the heat-fusion material H between the joint sheet portions J, sew them together with a sewing thread in this state, and then melt the heat-fusion material H to form heat-fusion portions H1, H2, and H3 in that order. According to this step, the heat-fusion material H can penetrate the perforation of the sewing needle, thus ensuring waterproofness.

[0156] This disclosure is not limited to the embodiments described above and illustrated in the accompanying drawings. For example, the following embodiments are also included within the technical scope of this disclosure. In this disclosure, the various features of the above-described embodiments and the embodiments described below can be arbitrarily combined as long as they do not contradict each other.

[0157] The structure, size, and spatial shape of the bathroom disclosed herein are not limited to the embodiments described above. In the bathroom, it is not necessary for the suspension unit to be mounted on the wall. The suspension unit can also be mounted on the bathroom ceiling. Alternatively, the suspension unit can be mounted on a movable frame installed on the bathroom floor. Preferably, a reinforcing structure is installed on the back of the wall, the back of the ceiling, the back of the bathroom floor, or other locations in the bathroom corresponding to the suspension unit.

[0158] The bathroom of the present invention does not necessarily need to have a suspension component for draining and drying the bathtub. When the bathroom has a suspension component for draining and drying, the wall on which it is installed is not particularly limited. That is, the suspension component for draining and drying can be installed on the wall where a shower device is provided, as exemplified in the above embodiments, or it can be installed on a wall that is not opposite to the wall where a shower device is provided and does not have a shower device. The suspension component for draining and drying is preferably installed on a wall other than the wall where a shower device is provided. For example, one suspension component for draining and drying can be installed on each of adjacent walls. In this case, the suspension component for draining and drying can suspend the bathtub with a larger gap from the wall surface at the corners of the two walls, which is more suitable for draining and drying.

[0159] The structure of the bathtub of the present invention is not limited to the embodiments described above. The bathtub may be configured as described in the embodiments above, having components such as ropes for suspending the main body of the bathtub, or it may be configured to have only the main body of the bathtub.

[0160] The shape, size, and structure of the bathtub body of the present invention are not particularly limited as long as it is made of sheet material used to store hot water in a suspended state. The shape of the bathtub body is not limited to the shapes exemplified in the above embodiments. In a top view of the usage state, the bathtub body can be a square, triangle, pentagon, or other polygon, a circle, an ellipse, etc.

[0161] In this invention, the structure of the sheet forming the bathtub body is not limited to the structures exemplified in the above embodiments. The sheet only needs to have a layer formed of a waterproof material and a layer formed of a durable material. The sheet may have two or more layers formed of waterproof materials. For example, Figure 11 The example sheet S3 has layers L1A and L1B composed of two impermeable materials. In the case of a sheet with multiple layers of impermeable materials, waterproofing can be further ensured compared to the case where there is only one impermeable material layer.

[0162] The material of the resin film, which is a layer formed of a non-permeable material, is not limited to the PU film exemplified in the above embodiments. As the raw material for the resin film, any non-permeable raw material is acceptable, such as polyvinyl chloride (PVC) and polyamide (PA) resins. The layer formed of the non-permeable material can also be a layer formed of a material other than the resin film, such as a fabric or cloth impregnated with a waterproof resin or rubber.

[0163] The sheet material may have two or more layers formed from durable raw materials. The fabric used in the layers formed from durable raw materials is not limited to the woven fabrics exemplified in the above embodiments, but may also be woven fabric, non-woven fabric, or the like. When the fabric is woven, its weave structure may be twill, satin, or the like, and is not limited to plain weave. The durable material is not limited to PE-based resins such as PET exemplified in the above embodiments, but may also be PA-based resins, acrylic (PMMA)-based resins, or the like.

[0164] When a sheet material is constructed with a fabric layer, this fabric layer does not necessarily have to be located on the outermost side of the sheet. The fabric layer can also be located further inside than the other layers in the sheet. In the case of fabric, it can impart a good texture to the material and allows for decorative processes such as dyeing and printing. Therefore, placing the fabric layer on the outermost side is significant from the perspective of improving the aesthetic design.

[0165] The outermost surface of a sheet does not necessarily have to be rougher than the innermost surface. The outermost surface can be smoother than the innermost surface, or it can have the same surface roughness. When the outermost surface is rough, it allows for a pleasing aesthetic design with a textured feel. Compared to a purely smooth surface, a rough surface can also have a range of surface roughness differences that are visually perceptible to the user. In this case, various choices can be made regarding the differences in texture and feel caused by the surface roughness, increasing design freedom. In other words, compared to a purely smooth surface, a rough surface expands the range of choices for texture, function, etc.

[0166] The sheet material can also have a thermal insulation function, as exemplified in Embodiment 2 above. In this case, the thermal insulation function is not limited to the form where the sheet material has a thermal insulation layer made of foamed resin, as in Embodiment 2; for example, it can also be as follows: Figure 12 The sheet S4 shown has a layer L4 with embedded heating wires E that are heated by electricity. The configuration of the insulating layer is not limited to the layer formed of a non-permeable material and a layer formed of a durable material as exemplified in Embodiment 2 above; for example, it can also be as follows... Figure 12As shown in the sheet S4, layer L4 is further outward than the layer (second layer L2) formed of a durable material. As a sheet with heat insulation function, it can also be formed by simply sandwiching heating wires between the multiple layers forming the sheet.

[0167] In the bathtub of the present invention, the bathtub body does not necessarily have a folded-back portion. When the bathtub body has a folded-back portion, its structure, shape, and arrangement are not limited to the embodiments described above. The folded-back portion is not limited to a form that covers the entire circumference of the upper edge of the bathtub body; for example, it may be a partial form, such as a form that is only provided on two of the four sides of the upper edge of the bathtub body, which is rectangular in plan view. The folded-back portion may also be a form in which the upper edge of the bathtub body folds back inward in the use state. It should be noted that, in this disclosure, "rectangle" refers to a rectangle that includes a square. That is, the "rectangle" in this disclosure includes a square.

[0168] The bathtub disclosed herein is not necessarily equipped with ropes. When the bathtub is equipped with ropes, their shape, arrangement, etc., are not limited to the embodiments described above. The ropes may also be loop-shaped. In this case, the ropes may be loop-shaped ropes along the upper edge of the bathtub body, loop-shaped ropes passing through a through hole formed in the bathtub body, etc.

[0169] The locking part disclosed herein can be hooked onto a suspension part installed in the bathroom, and its shape, size, structure, etc., are not limited to the examples exemplified in the above embodiments. Examples of locking parts include those formed in a through hole in the bathtub body, and those with a loop rope passing through the through hole in the bathtub body. The locking part may also be a form that only connects the end of the rope to the suspension part. When the bathtub is equipped with locking parts, the number of such parts can be five or more, or three or fewer.

[0170] In the joints disclosed herein, the joining method, configuration, structure, etc., are not particularly limited. The joining method of the sheets based on the joint is not limited to the heat fusion based on heat fusion materials exemplified in the above embodiments, but may also be based on sewing with stitching thread, bonding based on adhesive materials, etc. The joint may also be formed by combining multiple of these joining methods.

[0171] The joint can be located outside the center of the side wall portion in the direction of extension, or it can be located outside the side wall portion, such as the bottom wall portion of the bathtub body. The joint is not limited to a shape that extends in the vertical direction; for example, it can also be a shape that extends in a direction that intersects the vertical direction.

[0172] The joint disclosed herein may also be, for example, a Figure 13 The structure shown. Figure 13The shown joint 331 is a form in which heat fusion is performed without using heat fusion bonding material. Specifically, joint 331 is a form in which the first layer L1 composed of PU film is butted together in the joint sheet J and the PU is heat fused together. According to this structure, a joint with an extremely simple structure can be achieved. It should be noted that, as a variation of the joint in this manner, a method in which heat fusion bonding material is placed between the joint sheet portions to form a heat fusion joint can be given, for example.

[0173] The joint disclosed herein may also be, for example, a Figure 14 The structure shown. Figure 14 The joint 431 shown is a form in which, in addition to the structure of the joint 231 described above, a non-permeable seam tape TA is used to cover the joint 231. According to this method, the waterproofness of the joint can be further improved. It should be noted that the seam tape TA can be bonded to the non-permeable material layer (L1) of the sheet material by heat fusion, adhesive bonding, or other methods.

[0174] The joint disclosed herein allows the bathtub body to be formed into a desired shape. For example, in Figure 15 In the bathtub 210 shown, the bathtub body 230 has a relaxation portion 60. This relaxation portion 60 is formed by using a joint to bring the folds close to the periphery of the portion in the sheet where the relaxation portion 60 is formed. It should be noted that... Figure 15 The relaxed section 60 is an example of a handrail that functions as a support. Through the softness of the sheet material, such a handrail provides a unique feel that is previously unavailable, adaptable to the body of the bather.

[0175] Reference Figure 16 This illustrates another variation of the joint. Figure 16 The bathtub 310 shown includes a bathtub body 330. The bathtub body 330 is formed by joining multiple sheets through a joint 31. Specifically, the bathtub body 330 is formed by joining a sheet S1, which is the same as in the embodiments described above, and a sheet S5, which is cut separately from the sheet S1, through the joint 31. In this embodiment, the sheet S5 is elastic. With this configuration, by placing the sheet S5 in the bathtub body at the points in contact with body parts with many movable areas, such as the back, neck, head, and feet, the elasticity of the sheet can correspond to the stretching of body parts, changes in posture, and other movements. Therefore, the bather can move their body easily within the bathtub body 330, further enhancing the relaxing effect of bathing. Thus, when the bathtub body is formed by joining multiple sheets through a joint, it is easy to achieve a bathtub body with excellent appearance design, such as forming patterns or designs through the cut shape of the sheets, or forming it by joining them like panels.

[0176] The joint of this disclosure can also be formed for the purpose of reinforcing the bathtub body. Since the bathtub body of this disclosure is used to store hot water in a suspended state, it is envisioned that a load generated by suspension will act locally near the engaging part of this invention. It is envisioned that friction caused by sliding with the rope will occur in the insertion part of this disclosure. Therefore, for example, a folded-back part with multiple structures formed by overlapping sheets as reinforcement and joining them through the joint can be provided in the wide part, the insertion part, or other folded-back parts.

[0177] It should be noted that in the bathtub disclosed herein, the main body of the bathtub does not necessarily need to have a joint. (See reference...) Figure 17 An explanation is given of a method for forming the main body of the bathtub without using joints. Figure 17 The bathtub body 430 shown has a folding portion 433. The folding portion 433 is formed by partially folding the sheet forming the bathtub body 430 into a bag shape. The folding portion 433 is achieved by… Figure 17 The zipper Z, buttons, and other locking units shown maintain the folded state. With the folded portion 433 folded, the bathtub body 430 takes on a boat shape capable of holding hot water. By releasing the fold of the folded portion 433, the bathtub body 430 can deform from a boat shape into a flat sheet. Because the bathtub body 430 deforms into a flat sheet, it does not take up space, for example, during storage or drying after washing.

[0178] <Implementation Method 4>

[0179] like Figure 19 As shown, the bathtub 510 in Embodiment 4 is disposed in a bathroom 50. The bathroom 50 includes a wall W, a ceiling C, a bathroom floor F, a faucet 560, and four suspension members 70. The faucet 560 and the suspension members 70 are fixed to the wall W. The wall W includes interconnected walls W1, W2, and W3, and a wall (not shown) opposite wall W3. An entrance / exit for moving between adjacent changing rooms is formed on the wall (not shown). A door is provided at the entrance / exit. The bathroom floor F slopes gently downwards towards a drain (not shown).

[0180] Bathroom 50 does not have a fixed bathtub. Bathtub 510 is positioned along wall W3 of bathroom 50. With bathtub 510 installed in bathroom 50, a shower for washing the bather's body is formed on the entrance side of bathroom 50. Bathtub 510 can be easily installed and removed from bathroom 50. Bathroom 50 can be adapted for use as a shower room by removing bathtub 510.

[0181] Faucet device 560 is a shower device. Faucet device 560 includes a faucet 61, a water outlet pipe 62, an overhead shower head 63, and a handheld shower head 65. Faucet 61 is connected to a water supply pipe (not shown) and a hot water pipe. Faucet 61 is a mixing faucet. Faucet 61 allows adjustment of the temperature and volume of the hot and cold water, switching between water flow and stop, and switching the flow path. Faucet 61 can select any one of the water outlet pipe 62, the overhead shower head 63, or the handheld shower head 65 to spray hot water. The hot or cold water dispensed from faucet device 560 is referred to as hot water regardless of temperature or the mixing ratio of hot and cold water.

[0182] A water outlet pipe 62 extends from the faucet 61. The water outlet pipe 62 extends in a direction away from the wall W1. An overhead shower head 63 is positioned above the faucet 61. The overhead shower head 63 is connected to the faucet 61 via a conduit 67. The conduit 67 extends vertically upwards from the faucet 61 along the wall W1, bending at its upper end away from the wall W1. The overhead shower head 63 is located at the front end of the conduit 67. A handheld shower head 65 is connected to the faucet 61 via a hose 69. The handheld shower head 65 can move freely within the length of the hose 69.

[0183] Each suspension member 70 is hooked to a locking part 26 of the bathtub 510 (described later). Each suspension member 70 is bent into a J-shape so that it can hook onto the locking part 26 from above. The suspension members 70 are installed on two opposing walls W1 and W2 of the wall W. There are two suspension members 70 on each opposing wall W1 and W2, for a total of four. The two suspension members 70 installed on each wall W1 and W2 are spaced apart in the horizontal direction. The two suspension members 70 installed on wall W1 are positioned below the faucet 61. The spacing between the two suspension members 70 installed on wall W2 is equal to the spacing between the two suspension members 70 installed on wall W1. The four suspension members 70 are positioned at the same height.

[0184] like Figure 20 As shown, the bathtub 510 includes a bathtub body 520, two ropes 530, and four engaging parts 26. The bathtub body 520 is made of sheet material. When suspended from the suspension component 70 and filled with hot water, the bathtub body 520 takes on a boat shape (see reference). Figure 19 The engaging parts 26 are provided at the four corners of the upper edge of the bathtub body 520. The engaging parts 26 are the parts that are suspended in the bathtub 510 by the suspension members 70. The state in which the engaging parts 26 are suspended in the suspension members 70 and hot water is accumulated in the bathtub body 520 is called the use state.

[0185] The bathtub body 520 has a bottom portion 11 and side portions 12. The bottom portion 11 contacts the bathroom floor F during use (see reference). Figure 19Therefore, the bathtub 510 can support most of the weight of the bathroom floor F when in use. The side portion 12 surrounds the bottom portion 11 and rises upward when in use. Therefore, a suitable amount of hot water for bathing can be stored in the bathtub body 520.

[0186] The bathtub body 520 is constructed from a single sheet 13 cut to a specified shape. The sheet 13 lacks elasticity, allowing the bathtub body 520 to maintain a boat-like shape during use. The sheet 13 exhibits excellent flexibility, impermeability (waterproofing), and tensile durability.

[0187] Sheet 13 can be formed by overlapping multiple raw materials. These materials can be bonded together using an adhesive. As a specific example, sheet 13 can also be a double-layer structure formed by laminating polyester fabric and a polyurethane film. The polyester fabric can be disposed on one side of the outer surface of the bathtub body 520, and the polyurethane film can be disposed on one side of the inner surface of the bathtub body 520. The inner side of the bathtub body 520 is the side that stores hot water, and the outer side of the bathtub body 520 is the side opposite to the side that stores hot water.

[0188] like Figure 20 As shown, the upper edge of the bathtub body 520 has a pair of short sides 16 and a pair of long sides 17. The upper edge of the bathtub 510 is rectangular when viewed from above in its use state. The length of the short sides 16 is set to be the same as the shoulder width of an adult male. The length of the short sides 16 can be approximately 500 mm. The length of the long sides 17 is the dimension for an adult male to comfortably sit on the inside of the bathtub body 520. The length of the long sides 17 can be approximately 1600 mm.

[0189] like Figure 20 As shown, the bathtub body 520 has a folded-back portion 14 formed by folding the outer edge of the sheet 13 back outwards to create a cylindrical shape. A step created by forming the folded-back portion 14 is formed on the outer side of the bathtub body 520. The folded-back portion 14 is provided on a pair of short sides 16 and a pair of long sides 17. The portion of the sheet 13 folded back is formed by a three-fold seam (see reference). Figure 25 The sewing section 14A, which sews the portion of the folded section 14 other than the wide section 27 described later, is provided at the edge of the rope 530 disposed inside the folded section 14 (see reference). Figure 22 The folded section 14 is a double-layered structure formed by folding back the sheet 13, and thus functions to reinforce the upper edge of the bathtub body 520 together with the rope 530.

[0190] like Figure 20As shown, one rope 530 is provided on each of the long sides 17 of the upper edge of the bathtub body 520 in the use state. In the use state, the long sides 17 of the upper edge of the bathtub body 520 are difficult to bend downwards. As a result, the boat-shaped shape of the bathtub body 520 can be maintained, and sufficient hot water can be stored in the bathtub body 520.

[0191] The rope 530 has tensile strength sufficient to withstand sitting on the upper edge of the bathtub body 520 without breaking. The rope 530 can be made of polyester. The rope 530 passes through the full length of the folded-back portion 14 located on the long side 17. In use, the rope 530 is suspended between walls W1 and W2 (see reference). Figure 19 ).

[0192] like Figures 21 to 23 As shown, the engaging portion 26 includes a wide portion 27, a hanging loop portion 531, a reinforcing sheet 43, and a sewing portion 540. The wide portion 27 is provided at both ends of the folded-back portion 14 provided on the long side 17 in the longitudinal direction. The wide portion 27 is formed such that the fold-back amount of the sheet 13 is larger than that of other parts of the folded-back portion 14 on the long side 17. The width dimension of the wide portion 27 is approximately constant along the extending direction of the long side 17. The wide portion 27 makes it difficult for the engaging portion 26 to extend.

[0193] The lifting rings 531 are provided at both ends of the rope 530 in the direction of its extension. The lifting rings 531 are formed by folding back the ends of the rope 530. The lifting rings 531 are hooked onto the suspension components 70 installed on the walls W1 and W2. Figure 21 As shown, the eyelet end 33 of the closed eyelet portion 531 in the rope 530 is housed inside the wide portion 27.

[0194] like Figure 21 As shown, the end 33 of the ring has a ring sewing section 35. The ring sewing section 35 sews together a pair of ropes 34 that constitute the end 33 of the ring. The ring sewing section 35 is bent in a Z-shape and sewn together. The thread of the ring sewing section 35 alternately passes through the pair of ropes 34.

[0195] like Figure 21 As shown, the wide portion 27 has a first facet 36 and a second facet 37. The second facet 37 is the portion of the sheet 13 that overlaps with the first facet 36. The first facet 36 is disposed on the outer side (one side) of the lifting ring end 33. The second facet 37 is disposed on the inner side (the other side) of the lifting ring end 33.

[0196] like Figure 23 As shown, the reinforcing sheet 43 is folded in half and overlaps with the surface of the wide portion 27. The reinforcing sheet 43 has a first reinforcing portion 44 and a second reinforcing portion 45. The first reinforcing portion 44 overlaps with the surface of the first face portion 36. The second reinforcing portion 45 overlaps with the surface of the second face portion 37.

[0197] The reinforcing sheet 43, like the sheet 13 constituting the bathtub body 520, can also be a double-layer structure consisting of a polyester fabric and a polyurethane film. In this case, the polyester fabric can be disposed on the outer side of the reinforcing sheet 43, and the polyurethane film can be disposed on the inner side of the reinforcing sheet 43. The outer side of the reinforcing sheet 43 is the side opposite to the side that connects to the wide portion 27, and the inner side of the reinforcing sheet 43 is the side that connects to the wide portion 27.

[0198] like Figures 23 to 25 As shown, the sewing section 540 has a primary sewing section 541 and a secondary sewing section 42. (As...) Figure 23 As shown, in the stage before sewing the reinforcing sheet 43, the first sewing section 541 sews the end 33 of the hanging ring and the folded-back section 14 together. Figure 24 As shown, after the reinforcing sheet 43 is overlapped on the outer side of the folded-back portion 14, the secondary sewing portion 42 sews the reinforcing sheet 43 to the folded-back portion 14. The primary sewing portion 541 and the secondary sewing portion 42 are provided in the same position in the engaging portion 26. The primary sewing portion 541 and the secondary sewing portion 42 are duplicates. The primary sewing portion 541 and the secondary sewing portion 42 each have an edge sewing portion 46 and a center sewing portion 47.

[0199] The edge sewing portion 46 has a long side sewing portion 46A and a pair of short side sewing portions 46B in both the primary sewing portion 541 and the secondary sewing portion 42. The long side sewing portion 46A extends along the edge of the rope material 34 in either the primary sewing portion 541 or the secondary sewing portion 42. The short side sewing portions 46B extend across the pair of rope materials 34 in either the primary sewing portion 541 or the secondary sewing portion 42. The center sewing portion 47 sews the center of each rope material 34 in the width direction in either the primary sewing portion 541 or the secondary sewing portion 42. The center sewing portion 47 extends linearly from one short side sewing portion 46B to the other short side sewing portion 46B in either the primary sewing portion 541 or the secondary sewing portion 42.

[0200] Explanation of the single-sewing section 541 (refer to) Figure 23 and Figure 25 ).like Figure 23 As shown, the edge stitching portion 46 sews the edge of the folded-back portion 14. The long side stitching portion 46A extends along one long side of the first face portion 36. The thread of the long side stitching portion 46A passes through the first surface portion 36 and the second surface portion 37 that overlap at the edge of the rope material 34. The edge of the first face portion 36 is folded back and sewn. The long side stitching portion 46A fills the gap between the folded portion 14 and the end of the loop 33.

[0201] The short side sewing portion 46B extends along a pair of short sides of the first face 36. The thread of the short side sewing portion 46B passes through the overlapping first face 36 and second face 37. The portion of the thread of the short side sewing portion 46B that crosses the rope 34 passes through the first face 36, the rope 34, and the second face 37.

[0202] The center seam section 47 sews the center portion of the folded-back section 14. The thread of the center seam section 47 passes sequentially through the first face section 36, the rope material 34, and the second face section 37.

[0203] The secondary sewing section 42 is explained (refer to...). Figure 24 and Figure 25 ).like Figure 24 As shown, the edge stitching portion 46 sews to the edge of the reinforcing sheet 43. The long side stitching portion 46A extends along one long side of the first reinforcing portion 44 and the second reinforcing portion 45. The thread of the long side stitching portion 46A passes through the first reinforcing portion 44, the first face 36, the second face 37, and the second reinforcing portion 45, which overlap at the edge of the rope 34. The edges of the first reinforcing portion 44 and the second reinforcing portion 45 are folded back and sewn together. The long side stitching portion 46A overlaps with the long side stitching portion 46A of the primary stitching portion 541 at the first face 36 and the second face 37.

[0204] The short-side sewn portion 46B extends along a pair of short sides of the first reinforcing portion 44 and the second reinforcing portion 45. The thread of the short-side sewn portion 46B passes through the overlapping first reinforcing portion 44, first face 36, second face 37, and second reinforcing portion 45. The portion of the thread of the short-side sewn portion 46B that crosses the rope material 34 passes through the first reinforcing portion 44, first face 36, rope material 34, second face 37, and second reinforcing portion 45. The short-side sewn portion 46B overlaps with the short-side sewn portion 46B of the primary sewn portion 541 at the first face 36 and the second face 37.

[0205] The central sewing section 47 sews the center portion of the reinforcing sheet 43. The thread of the central sewing section 47 sequentially passes through the first reinforcing section 44, the first face section 36, the rope material 34, the second face section 37, and the second reinforcing section 45. The central sewing section 47 overlaps with the central sewing section 47 of the primary sewing section 541 on the first face section 36, the rope material 34, and the second face section 37.

[0206] An example of a bathing method using the bathtub 510 will be described. First, the bather places the bathtub 510 in the bathroom 50. Specifically, the bather attaches the engaging part 26 of the bathtub body 520 to the suspension member 70 of the bathroom 50. The bather can easily place the bathtub 510 in the bathroom 50 simply by hooking the engaging part 26 to the suspension member 70.

[0207] Next, the bather fills the bathtub body 520 with hot water. Specifically, the bather operates the faucet device 560 of the bathroom 50 to allow hot water of appropriate temperature to flow into the bathtub body 520. After the bather has poured an appropriate amount of water into the bathtub body 520, the faucet device 560 stops flowing water. The bottom surface 11 of the bathtub 510 is in contact with the bathroom floor F while filled with hot water.

[0208] Next, the bather enters the bathtub 510. Since the bottom surface 11 of the bathtub 510 is in contact with the bathroom floor F, the weight of the hot water stored in the bathtub body 520 or most of the bather's weight is supported by the bathroom floor F. The bather enters the bathtub 510 with their head facing the wall W2 side and their legs facing the wall W1 side. The bather's back is supported by the side surface 12. Since the rope 530 does not enter the short side 16 of the bathtub body 520, the bather only feels the softness of the fabric when placing their head or legs on the short side 16 of the bathtub body 520, allowing them to relax and bathe comfortably.

[0209] After bathing, the bather pulls out the drain plug (not shown) of the bathtub body 520 to drain the hot water. Then, the bather removes the bathtub 510 from the walls W1 and W2. The bather can easily remove the bathtub 510 from the walls W1 and W2 simply by detaching the locking part 26 from the suspension part 70. The bather washes the removed bathtub 510 and dries it by hanging it on a faucet device 560, etc. The bather folds the bathtub body 520 to make it compact and stores it outside the bathroom.

[0210] According to Embodiment 4 as described above, the following effects are achieved: The bathtub 510 includes a sheet bathtub body 520 and a rope 530. The bathtub body 520 is used to store hot water in a suspended state. The rope 530 is arranged along the upper edge of the bathtub body 520 in the suspended state. The bathtub body 520 has a fold-back portion 14. The fold-back portion 14 is formed by folding back the outer edge of the sheet 13 constituting the bathtub body 520. The rope 530 has a loop portion 531 formed by folding back the end of the rope 530. The loop end 33 of the closed loop portion 531 in the rope 530 is housed inside the fold-back portion 14. The loop end 33 and the fold-back portion 14 are sewn together with thread. The thread passes through a first surface 36 located on the outside of the loop end 33 in the fold-back portion 14 to the loop end 33 and a second surface 37 located on the inside of the loop end 33 in the fold-back portion 14. According to this structure, the end 33 of the hanging ring and the folded-back portion 14 can be firmly fixed, thereby increasing the strength of the engaging portion 26 suspended from the suspension component. Even if part of the thread sewing the end 33 of the hanging ring and the folded-back portion 14 comes undone, the offset of the end 33 of the hanging ring and the folded-back portion 14 can be suppressed.

[0211] The pair of ropes 34 forming the end 33 of the eyelet in the rope 530 are sewn together with thread. According to this structure, the pair of ropes 34 forming the end 33 of the eyelet can be firmly fixed to each other, thus increasing the strength of the eyelet portion 531.

[0212] The first facet 36 and the second facet 37 are sewn together along the edge of the rope 34 that forms the end 33 of the ring. This structure reduces the gap between the end 33 of the ring and the edge of the folded-back portion 14, thus making it difficult for water to enter between the edge of the rope 34 and the folded-back portion 14.

[0213] The bath tub 510 has a reinforcing sheet 43 that overlaps with the outer side of the folded-back portion 14. The reinforcing sheet 43 has a first reinforcing portion 44 that overlaps with the first face portion 36 and a second reinforcing portion 45 that overlaps with the second face portion 37. The folded-back portion 14 and the reinforcing sheet 43 are sewn together with thread. The thread runs from the first reinforcing portion 44 through the first face portion 36, the end of the hanging ring 33, the second face portion 37, and the second reinforcing portion 45. According to this structure, the reinforcing sheet 43, the folded-back portion 14, and the end of the hanging ring 33 can be firmly fixed, thereby improving the strength of the engagement portion 26 suspended from the suspension component.

[0214] The first reinforcing part 44 and the second reinforcing part 45 are sewn together along the edge of the rope material 34 that forms the end of the lifting ring 33. According to this structure, the gap between the end of the lifting ring 33 and the edge of the reinforcing sheet 43 can be reduced, thus making it difficult for water to enter between the end of the lifting ring 33 and the edge of the reinforcing sheet 43.

[0215] This disclosure is not limited to the embodiment 4 described above and illustrated in the accompanying drawings. For example, the following embodiments are also included within the technical scope of this disclosure.

[0216] (1) In the above embodiment 4, the lifting ring 531 is directly hooked to the suspension member 70. However, it is not limited to this, the lifting ring may also be hooked to the suspension member via a hooking member such as an S-hook.

[0217] (2) In the above embodiment 4, the case where the rope 530 is disposed on the long side 17 of the bath tub body 520 is illustrated. However, it is not limited to this, the rope may also be disposed on the short side of the bath tub body.

[0218] (3) In the above embodiment 4, the rope 530 may also be a rope, line, etc.

[0219] (4) In the above embodiment 4, the faucet device is a shower device. However, it is not limited to this, the faucet device may not have a shower head.

[0220] (5) In embodiment 4 above, the bathtub 510 is suspended by hooking onto the suspension member 70 provided on the wall W. It is not limited to this, the bathtub may also be suspended by hooking onto the suspension member provided on the frame provided on the bathroom floor.

[0221] (6) In the above embodiment 4, the upper edge of the bath tub 510 is rectangular when viewed from above. However, it is not limited to this, and the upper edge of the bath tub may also be other shapes when viewed from above.

[0222] (7) In embodiment 4 described above, the bathroom 50 has four suspension members 70. However, it is not limited to this; the bathroom may also have five or more suspension members. In this case, the locking part of the bathtub may be hooked onto a suspension member selected from the plurality of suspension members.

[0223] (8) In the above embodiment 4, the pair of ropes 34 constituting the end 33 of the lifting ring are sewn together. However, it is not limited to this, the pair of ropes constituting the end of the lifting ring may also be welded together or otherwise.

[0224] (9) In the above embodiment 4, the engaging portion 26 has a reinforcing sheet 43. However, it is not limited to this; the engaging portion may not necessarily have a reinforcing sheet. For example, the engaging portion may be reinforced by folding back the outer edge of the sheet constituting the bathtub body more than twice.

[0225] (10) In the above embodiment 4, the reinforcing sheet 43 is folded in half and overlaps with the folded-back portion 14. It is not limited to this, the reinforcing sheet may also be divided into two sheets, or one sheet may be overlapped on the first face and the second face of the folded-back portion.

[0226] (11) In the above embodiment 4, the reinforcing sheet 43 may be made of the same material as the sheet 13 constituting the bath body 520, or it may be made of a different material.

[0227] (12) In the above embodiment 4, the middle sewing section 47 sews both sides of the pair of ropes 34 constituting the end of the ring 33 in either the primary sewing section 541 or the secondary sewing section 42. However, it is not limited to this; the middle sewing section may also sew only one side of the pair of ropes constituting the end of the ring. In this case, for example, both sides of the pair of ropes may be sewn in the primary sewing section, and only one side of the pair of ropes may be sewn in the secondary sewing section. In this case, only the side of the pair of ropes containing the end face of the rope may be sewn.

[0228] (13) In the above embodiment 4, the primary sewing part 541 and the secondary sewing part 42 are applied to the same position. However, it is not limited to this, the primary sewing part and the secondary sewing part do not necessarily have to be provided in the same position.

[0229] (14) In the above embodiment 4, the center sewing section 47 is also implemented by the secondary sewing section 42. However, it is not limited to this, the center sewing section may also be implemented by only the primary sewing section.

[0230] (15) In the above embodiment 4, the center seam 47 sews the center of each rope 34 in the width direction into a straight line. Not limited thereto, the center seam can also be sewn into a serrated shape by alternately passing through a pair of ropes.

[0231] <Implementation Method 5>

[0232] Embodiments 5 and 6, which embody the bathtub and bathroom of this disclosure, will be described with reference to the accompanying drawings. Figure 26 and Figure 27 As shown, the bathtub 610 of Embodiment 5 is disposed in a bathroom 650. The bathroom 650 includes walls W1, W2, W3, W4, a ceiling C, and a bathroom floor F. The bathroom floor F is rectangular when viewed from above. Walls W1 and W2 rise opposite each other along a pair of short sides of the bathroom floor F. Walls W3 and W4 rise opposite each other along a pair of long sides of the bathroom floor F. The bathroom 650 has an entrance Ent provided on wall W4. The entrance Ent is used by bathers to move between adjacent changing rooms (not shown). The entrance Ent has a sliding door D that can be opened and closed freely.

[0233] like Figure 27 As shown, the bathroom floor F has a bathroom drain outlet 80. The bathroom drain outlet 80 is located on the side of the bathroom floor F opposite the entrance / exit Ent, on the wall W3. The bathroom drain outlet 80 includes a drain hopper 81, a floor drain 83, a water seal 85, a hair scraper (not shown), and a drain bend (not shown). The drain hopper 81 has a square upper outer perimeter when viewed from above. When viewed from above, one side of the square upper outer perimeter of the drain hopper 81 extends along the lower edge of the wall W3. The drain hopper 81 is recessed downwards from the bathroom floor F. When viewed from above, the floor drain 83 is approximately square, slightly smaller than the upper outer perimeter of the drain hopper 81. The floor drain 83 is mounted on the upper outer perimeter of the drain hopper 81 and is easily removable. Hot water flows from the bathroom floor F through the gap between the upper outer perimeter of the drain hopper 81 and the floor drain 83. The bathroom floor F has a slight slope so that hot water flows towards the bathroom drain outlet 80. The water sealing cylinder 85 is cylindrical in shape. When viewed from above, the water sealing cylinder 85 is connected to the center of the bottom surface of the drainage hopper 81 and extends downward.

[0234] like Figure 26As shown, bathroom 650 includes a shower unit 660. The shower unit 660 is mounted on wall W1. When viewed from the rear, the shower unit 660 is positioned at the center of wall W1. The shower unit 660 includes a faucet 61, an overhead shower head 63, and a handheld shower head 65. The shower unit 660 is connected to a water supply pipe and a hot water pipe (not shown) within wall W1. The faucet 61 is a mixing faucet. The faucet 61 allows for adjustment of water volume, temperature adjustment of hot and cold water mixing, water flow control, and flow path switching. The faucet 61 has a water outlet pipe 61A. The hot or cold water dispensed from the shower unit 660 within bathroom 650 is referred to as hot water regardless of temperature or mixing ratio.

[0235] A top-mounted shower head 63 is positioned above the faucet 61. The top-mounted shower head 63 is connected to the faucet 61 via a conduit 67. The conduit 67 extends vertically upwards from the faucet 61 along the wall W1, bending at its upper end away from the wall W1. The top-mounted shower head 63 is located at the front end of this conduit 67. A handheld shower head 65 is connected to the faucet 61 via a hose 69. The handheld shower head 65 can be freely moved within the length of the hose 69. The shower unit 660 can select any one of the following to dispense hot water: the outlet pipe 61A of the faucet 61, the top-mounted shower head 63, or the handheld shower head 65.

[0236] like Figure 26 and Figure 27 As shown, the bathroom 650 can be easily installed near the wall W3 with the bathtub 610 described later. When the bathtub 610 is installed, a space for washing the body of a bather is formed on the wall W4 side of the bathroom 650. The bathroom 650 can be used without the bathtub 610. By removing the bathtub 610, the bathroom 650 can be appropriately used as a shower room, etc.

[0237] Two suspension members 70 are provided on each of the opposing walls W1 and W2. Each suspension member 70 is a hook-shaped (J-shaped, open at the side) and fixed to the respective wall W1 or W2. The two suspension members 70 on the wall W1 side are positioned below the faucet 61 and are spaced apart horizontally. The spacing between the two suspension members 70 fixed to the wall W1 is slightly wider than the length of the upper ends of the third side wall portion 623 and the fourth side wall portion 624 of the bathtub body 620 (described later). The two suspension members 70 fixed to the wall W2 side are positioned opposite to the two suspension members 70 fixed to the wall W1 side and are fixed at the same height and spacing as the two suspension members 70 on the wall W1 side.

[0238] The bathtub 610 is suspended from the bathroom 650 by hooking the hook-shaped portions of the four suspension members 70 provided on the walls W1 and W2 with the four hanging rings 41 described later. The bathtub 610 is positioned close to the wall W3. When the bathtub 610 is suspended from the bathroom 650, the second side wall portion 622, which is provided with the bathtub drain outlet 630 described later, is positioned on the side of the wall W3. The bathtub 610 can be easily installed and removed from the bathroom 650.

[0239] like Figures 26 to 28 As shown, the bathtub 610 comprises a bathtub body 620 and two ropes 40. The bathtub body 620 is formed by cutting and welding a sheet of material. The sheet is a double-layer structure formed by laminating a polyester fabric and a polyurethane film. The polyester fabric has excellent heat resistance and chemical resistance. The polyester fabric is a plain weave fabric with high tensile strength. The polyurethane film is non-permeable and has excellent water resistance. The sheet is flexible. The sheet has insufficient elasticity. The bathtub body 620 is formed with the polyester fabric on the outside and the polyurethane film on the inside.

[0240] The bathtub body 620 is used in a suspended state where it is hooked onto each suspension component 70 by the hanging ring 41 and stores hot water. When viewed from above in the use state where hot water is stored, the bathtub body 620 is rectangular.

[0241] The bathtub body 620 has four sidewall portions 621, 622, 623, and 624, representing the first to fourth sidewall portions. The first sidewall portion 621 and the second sidewall portion 622 extend downwards from opposite long sides when viewed from above. The third sidewall portion 623 and the fourth sidewall portion 624 extend downwards from opposite short sides when viewed from above. The end edges of the third sidewall portion 623 and the fourth sidewall portion 624 are continuous with the end edges of the first sidewall portion 621 and the second sidewall portion 622.

[0242] The bathtub body 620 has a folded-back portion 625, which folds back the upper edges of the first sidewall portion 621 and the second sidewall portion 622 outward to form a cylindrical shape. Each folded-back portion 625 is formed over the entire upper edge of the first sidewall portion 621 and the second sidewall portion 622. Each folded-back portion 625 has openings at both ends. The bathtub body 620 also has a folded-back portion 626, which folds back the upper edges of the third sidewall portion 623 and the fourth sidewall portion 624 outward to form a cylindrical shape. Each folded-back portion 626 is formed over the entire upper edge of the third sidewall portion 623 and the fourth sidewall portion 624.

[0243] Two ropes 40 are inserted into the fold-back portions 625 formed in the first side wall portion 621 and the second side wall portion 622, respectively. Each rope 40 reinforces the bathtub body 620 by being inserted into its respective fold-back portion 625. The two ends of each rope 40 extend outward from both ends of the fold-back portion 625 of the bathtub body 620. The two ends of each rope 40 extending outward from the openings at both ends of the fold-back portion 625 of the bathtub body 620 are sewn to the front end near the opening of the fold-back portion 625 to form a hanging ring portion 41. Each rope 40 is sewn to the bathtub body 620 inside the openings at both ends of the fold-back portion 625 of the bathtub body 620.

[0244] By hooking the hanging loops 41 formed at both ends of each rope 40 onto four suspension members 70 fixed to walls W1 and W2, the bathtub 610 is configured to be suspended in the bathroom 650. When the bathtub 610 is suspended in the bathroom 650, the second sidewall portion 622, which is equipped with the bathtub drain outlet 630 (described later), is positioned on the wall W3 side. That is, in the usage state where the bathtub 610 is suspended and hot water is stored, the bathroom floor F of the bathroom 650 is as follows... Figure 27 As shown, a bathroom drain outlet 80 is provided on one side where the bathtub drain outlet 630 is located.

[0245] The bathtub 610 deforms when hot water is accumulated in a suspended state with the hanging ring 41 hooked onto the suspension component 70. For example... Figure 26 As shown, when the bathtub 610 is filled with hot water, the lower center of the bathtub body 620 contacts the bathroom floor F. Because the bathtub body 620 is formed from a sheet material with limited elasticity, it maintains a boat-like shape to some extent when filled with hot water. When filled with hot water, the bathtub 610 supports most of the load on the bathroom floor F, thus simplifying the reinforcement structure of walls W1 and W2 compared to situations where the support is solely provided by walls W1 and W2. The bathtub 610 can freely change its shape, including its folded state, unfolded state, and hot water filling state.

[0246] like Figures 28 to 31 As shown, the bathtub body 620 has a bathtub drain outlet 630. The bathtub drain outlet 630 has a drain plug 636 that opens and closes from the inside of the bathtub body 620. The bathtub drain outlet 630 is provided on the second side wall portion 622. The bathtub drain outlet 630 is configured such that, in the usage state where the bathtub body 620 is suspended in the bathroom 650 and used to store hot water, it is located above the bathroom floor F away from the bathroom 650 and near the bathroom floor F of the bathroom 650 (see reference). Figure 26 ).like Figure 31 As shown, the bath tub body 620 has a bath tub drain outlet component 630A with a drain plug 636 installed in a circular through hole 622H formed in the second side wall portion 622.

[0247] like Figures 29 to 31 As shown, the bathtub drain component 630A includes a water-passing component 631, a fixing component 633, and a plug component 635. The water-passing component 631 is made of resin. Figure 30 and Figure 31 As shown, the water-passing component 631 includes a water-passing body 631A and a flange portion 631B. The water-passing body 631A and the flange portion 631B are formed integrally. The water-passing body 631A is cylindrical and has threads cut on its outer peripheral surface. The outer diameter of the water-passing body 631A is slightly smaller than the inner diameter of the through hole 622H formed in the second side wall portion 622 of the bath tub body 620. The inner diameter of the water-passing body 631A is 20 mm. The inner diameter of the water-passing body 631A corresponds to the opening diameter of the bath tub drain outlet 630. The flange portion 631B extends radially from one outer peripheral end of the water-passing body 631A relative to the central axis of the water-passing body 631A. The outer peripheral edge of the flange portion 631B is circular. The outer diameter of the flange portion 631B is larger than the inner diameter of the through hole 622H formed in the second side wall portion 622 of the bath tub body 620.

[0248] The fixing component 633 is made of resin. For example... Figure 31 As shown, the fixing member 633 includes a fixing body 633A, a flange 633B, and three tabs 633C. The fixing body 633A, the flange 633B, and each tab 633C are formed integrally. The fixing body 633A is cylindrical and has threads cut into its inner circumferential surface. The flange 633B extends radially from one outer circumferential end of the fixing body 633A relative to the central axis of the fixing body 633A. The outer circumferential edge of the flange 633B is circular. The outer diameter of the flange 633B is larger than the inner diameter of the through hole 622H formed in the second sidewall portion 622 of the bath tub body 620. Each tab 633C extends continuously from the flange 633B along the central axis direction of the fixing body 633A and along the outer circumferential surface of the fixing body 633A. Each tab 633C is arranged at equal intervals in the circumferential direction of the fixing body 633A.

[0249] The bolt component 635 is made of a flexible resin. For example... Figures 29 to 31As shown, the plug component 635 includes a drain plug 636, a fixing part 637, and a connecting part 638. The drain plug 636, the fixing part 637, and the connecting part 638 are formed as one piece. The drain plug 636 has a cover part 636A, an insertion part 636B, and a handle part 636C. The cover part 636A is disc-shaped. The insertion part 636B is a pointed cylindrical shape that protrudes from one side of the cover part 636A. The maximum diameter of the insertion part 636B is approximately equal to the inner diameter of the water-passing part body 631A of the water-passing component 631. The handle part 636C is a rectangular flat plate with one short side continuous with the outer periphery of the cover part 636A. The fixing part 637 is an annular flat plate. The inner diameter of the fixing part 637 is approximately equal to the inner diameter of the through hole 622H formed in the second side wall part 622 of the bath tub body 620. The connecting part 638 is a strip-shaped plate that connects the outer periphery of the part of the cover 636A that is continuous with the part of the handle 636C to the outer periphery of the fixing part 637.

[0250] like Figure 31 As shown, the bathtub drain outlet component 630A allows the water-passing part body 631A of the water-passing component 631 to pass through the fixing part 637 of the plug component 635, which is disposed inside the bathtub body 620 and matches the through hole 622H formed in the second side wall portion 622 of the bathtub body 620. In this state, the fixing member 633 is screwed into the water-passing part body 631A of the water-passing component 631, which protrudes from the outside of the bathtub body 620, and is thus secured. In this way, the bathtub drain outlet component 630A is installed on the second side wall portion 622 of the bathtub body 620. The bathtub drain outlet component 630A installed on the second side wall portion 622 of the bathtub body 620 forms the bathtub drain outlet 630.

[0251] The drain plug 636 closes the bathtub drain outlet 630 by inserting the insertion part 636B from the inside of the bathtub body 620 into the water-passing part body 631A of the water-passing component 631 until the cover part 636A contacts the flange part 631B of the water-passing component 631. The drain plug 636 opens the bathtub drain outlet 630 by pinching the handle part 636C from the inside of the bathtub body 620 and pulling the insertion part 636B out of the water-passing part body 631A. Figure 30 As shown, the drain plug 636, which is removed from the bath drain outlet 630, is suspended in the bath body 620 via the connecting part 638 at a position lower than the water-passing component 631.

[0252] <Implementation Method 6>

[0253] like Figures 32 to 34As shown, the point with reinforcing member 739 and the inner diameter D2 of the through hole 722H in the bathtub body 720 of Embodiment 6 are different from those in Embodiment 5. Other structures are the same as in Embodiment 5. The same reference numerals are used to label structures identical to those in Embodiment 5, and detailed descriptions are omitted. The bathroom 650 is the same as in Embodiment 5, therefore detailed descriptions are omitted.

[0254] A through hole 722H is formed in the second side wall portion 722 of the bathtub body 720. The outer edge of the through hole 722H has a reinforcing member 739 for reinforcement. The reinforcing member 739 is annular in shape. The outer diameter of the reinforcing member 739 is equal to the outer diameter of the flange portion 633B of the fixing member 633. The inner diameter of the reinforcing member 739 is approximately equal to the inner diameter D2 of the through hole 722H. The reinforcing member 739 is arranged with the outer edge of the through hole 722H aligned with the inner edge of the reinforcing member 739, and is heat-fused to the outside of the bathtub body 720 via a heat-fusion welding member 739A of the same shape as the reinforcing member 739. The reinforcing member 739 is made of polyester fabric of the same material as the outside of the bathtub body 720.

[0255] like Figure 34 As shown, the inner diameter D2 of the through hole 722H formed in the bath tub body 720 is smaller than the outer diameter D1 of the water passage body 631A. The outer diameter D1 of the water passage body 631A is 26.4 mm, and the inner diameter D2 of the through hole 722H is 26.0 mm.

[0256] As explained above, the bathtub 610 of Embodiments 5 and 6 includes a bathtub body 620 and 720 made of sheet material for storing hot water in a suspended state, and the bathtub body 620 and 720 have bathtub drain outlets 630 and 730 for draining the stored hot water. By having bathtub drain outlets 630 and 730 on the bathtub body 620 and 720, the bathtub 610 can easily drain the hot water stored in the bathtub body 620 and 720.

[0257] In the bathtub 610 of embodiments 5 and 6, when the bathtub body 620, 720 is suspended from the bathroom 650 to store hot water, the bathtub drain outlets 630, 730 are located above the bathroom floor F, away from the bathroom 650. Because the bathtub 610 has its drain outlets 630, 730 located above the bathroom floor F, away from the bathroom 650, the water flow will not be weakened or unable to drain due to contact between the drain outlets 630, 730 and the bathroom floor F, thus ensuring good drainage.

[0258] In the bathtub 610 of embodiments 5 and 6, the opening diameter of the bathtub drain outlets 630 and 730 is 20 mm. Since the opening diameter of the bathtub drain outlets 630 and 730 is less than 40 mm, the drainage flow rate of the bathtub drain outlets 630 and 730 does not exceed the drainage flow rate of the bathroom drain outlet 80. The hot water discharged from the bathtub drain outlets 630 and 730 and flowing into the bathroom drain outlet 80 of the bathroom 650 is unlikely to diffuse on the bathroom floor F of the bathroom 650.

[0259] In the bathtub 610 of embodiments 5 and 6, the bathtub drain outlets 630 and 730 are equipped with drain plugs 636 that can be opened and closed from the inside of the bathtub body 620 and 720. Since the drain plugs 636 can be opened and closed from the inside of the bathtub body 620 and 720, the drain plugs 636 can be easily opened when draining hot water accumulated in the bathtub body 620 and 720. In particular, since the bathtub body 620 and 720 are suspended near the wall W3 of the bathroom 650, even if the gap between the bathroom wall W3 and the bathtub 610 is small and the hands of bathers cannot reach between the bathroom wall W3 and the bathtub 610, the drain outlets 630 and 730 can still be opened and closed from the inside of the bathtub body 620 and 720, thus making it easy to open and close the drain plugs 636.

[0260] In embodiment 6, the bathtub body 720 has a through hole 722H constituting the bathtub drain outlet 730, and a reinforcing member 739 that strengthens the outer edge of the through hole 722H. The bathtub 610 uses the reinforcing member 739 to suppress deformation of the through hole 722H. Therefore, even when the bathtub 610 is filled with hot water and water pressure is applied, deformation of the through hole 722H can be suppressed, and the water-conducting member 631 is unlikely to detach from the bathtub body 720.

[0261] In embodiment 6, the bathtub drain outlet 730 includes: a through hole 722H formed in the bathtub body 720; and a water-passing component 631 having a water-passing main body 631A inserted into the through hole 722H. The inner diameter D2 of the through hole 722H is smaller than the outer diameter D1 of the water-passing main body 631A. This bathtub 610 can reduce the gap between the through hole 722H and the water-passing component 631, so even when filled with hot water and water pressure is applied, the water-passing component 631 installed in the through hole 722H is not easily detached from the bathtub body 720.

[0262] The bathroom 650 in embodiments 5 and 6 includes a bathroom floor F, which has a bathroom drain 80 located on the side where the bathtub drains 630 and 730 are located when the bathtub 610 is suspended and hot water is stored. Since the bathroom 650 can have the bathroom drain 80 located on the bathroom floor F near the bathtub drains 630 and 730 of the bathtub 610, hot water discharged from the bathtub drains 630 and 730 can flow to the bathroom drain 80 before spreading to the bathroom floor F of the bathroom 650.

[0263] The bathroom 650 in embodiments 5 and 6 includes an entrance / exit Ent, and a bathroom drain outlet 80 is located on the wall W3 side opposite to the entrance / exit Ent. Hot water discharged from the bathtub drain outlets 630 and 730 flows into the bathroom drain outlet 80 formed on the wall W3 side opposite to the entrance / exit Ent, so that when hot water is discharged from the bathtub drain outlet 630, it will not splash towards the entrance / exit Ent or wet the person inside the bathroom 650. The bathroom 650 has a bathroom drain outlet 80 on the wall W3 side opposite to the entrance / exit Ent, thus providing a good aesthetic effect.

[0264] This disclosure is not limited to the embodiments 5 and 6 described above and illustrated in the accompanying drawings. For example, the following embodiments are also included within the technical scope of this disclosure.

[0265] (1) In embodiments 5 and 6, the bath tub body 620, 720 has a bath tub drain outlet 630, 730. In contrast, the bath tub body may also have multiple bath tub drain outlets.

[0266] (2) In embodiments 5 and 6, when the bathtub 610 is in use and the main bodies 620 and 720 of the bathtub are suspended in the bathroom 650 to store hot water, the drain outlets 630 and 730 of the bathtub are located above the bathroom floor F. In contrast, the bathtub can also be in use with the drain outlet in contact with the bathroom floor.

[0267] (3) In embodiments 5 and 6, the opening diameter of the bath drain outlets 630 and 730 is 20 mm. The opening diameter of the bath drain outlet can be less than 40 mm, and can be between 15 mm and 35 mm.

[0268] (4) In embodiments 5 and 6, the drain plug 636 is opened and closed from the inside of the bath tub body 620, 720. In contrast, the drain plug can also be opened and closed from the outside of the bath tub body.

[0269] (5) In embodiments 5 and 6, the bathroom floor F of the bathroom 650 has a bathroom drain 80 on the side where the bath drain outlets 630 and 730 are located. In contrast, the location of the bathroom drain can be set at any location regardless of the location of the bath drain outlet.

[0270] (6) In embodiments 5 and 6, the bathroom drain outlet 80 is located on the wall W3 side opposite to the entrance / exit Ent. In contrast, the location of the bathroom drain outlet can also be located at any location regardless of the location of the entrance / exit.

[0271] (7) In embodiment 6, the reinforcing member 739 is in the shape of a ring. In contrast, the reinforcing member may also be in other shapes such as a square, a polygon, or an ellipse.

[0272] (8) In embodiment 6, a reinforcing member 739 with an inner diameter approximately equal to the inner diameter D2 of the through hole 722H is bonded. Alternatively, multiple reinforcing members may be used. Multiple sheets may be overlapped and bonded together. Multiple sheets may be arranged around the through hole and bonded together.

[0273] (9) In embodiment 6, the reinforcing member 739 is heat-fused via a heat-fusion member 739A of the same shape. In contrast, the reinforcing member can also be bonded to the bath body by any method other than heat fusion.

[0274] (10) In embodiment 6, the reinforcing member 739 is thermally fused to the outside of the bath body 720. In contrast, the reinforcing member only needs to be bonded to at least one of the inside and outside of the bath body.

[0275] (11) In embodiment 6, the reinforcing member 739 is made of polyester fabric of the same material as the outer side of the bathtub body 720. In contrast, the reinforcing member can also be made of any other material.

[0276] (12) In embodiment 6, the outer diameter D1 of the water passage body 631A is 26.4 mm, and the inner diameter D2 of the through hole 722H is 26.0 mm. In contrast, the inner diameter of the through hole is smaller than the outer diameter of the water passage body, as long as the outer edge of the through hole will not crack due to the insertion of the water passage body.

[0277] Explanation of reference numerals in the attached figures

[0278] 1: Bathroom; 10, 210, 310: Bathtub; 20: Suspension component (suspension part); 21: Drying suspension component (drying suspension part); 30, 230, 330, 430: Bathtub body; 32: Fold-back part; 40: Rope; 41: Hanging ring part (locking part); L1, L1A, L1B, L2, L3, L4: Sheet layers (L1, L1A, L1B: First layer (layer formed of impermeable material), L2: Second layer (layer formed of durable material), L3: Third layer (layer formed of insulating material)); S1, S2, S3, S4 S5: Sheet 1: Bathroom; 10, 210, 310: Bathtub; 20: Suspension component (suspension part); 30, 230, 330, 430: Bathtub body; 30A, 30B, 30C, 30D: Side wall (30A: First side wall, 30B: Second side wall, 30C: Third side wall, 30D: Fourth side wall); 31, 231, 331, 431: Joint; 32: Fold-back; H: Heat-fusion bonding material; L1, L1A, L1B: First layer (non-permeable material layer); L2: Second layer (fabric); S1, S2, S3, S4, S5: Sheet

[0279] 510: Bathtub; 14: Fold-back section; 520: Bathtub body; 530: Rope; 531: Hanging ring section; 33: Hanging ring end; 36: First surface; 37: Second surface; 34: Rope material; 43: Reinforcing sheet; 44: First reinforcing part; 45: Second reinforcing part; 50: Bathroom; 70: Suspension component

[0280] 610: Bath tub; 620, 720: Bath tub body; 622H, 722H: Through hole; 630, 730: Bath tub drain outlet; 636: Drain plug; 739: Reinforcing component; 650: Bathroom; 80: Bathroom drain outlet; Ent: Entrance / exit; F: Bathroom floor.

Claims

1. A bathtub comprising a sheet bathtub body for storing hot water in a suspended state, characterized in that, The sheet forming the main body of the bathtub has multiple layers. At least one of the plurality of layers is formed of a non-permeable material, and at least one other layer is formed of a durable material.

2. The bath tub according to claim 1, characterized in that, The outermost layer of the sheet is made of cloth.

3. The bathtub according to claim 1 or 2, characterized in that, At least one of the multiple layers of the sheet is formed of a material with thermal insulation properties.

4. The bathtub according to claim 1 or 2, characterized in that, The outermost surface of the sheet is rougher than the innermost surface.

5. The bathtub according to claim 1 or 2, characterized in that, When in use, the upper edge of the bath tub body has a folded-back portion that folds back outwards.

6. The bathtub according to claim 5, characterized in that, It is equipped with ropes to suspend the main body of the bathtub during use. The rope extends by inserting into the fold-back section.

7. The bath tub according to claim 1 or 2, characterized in that, It has at least four latching parts that hook onto a suspension unit installed in the bathroom.

8. A bathtub comprising a sheet bathtub body for storing hot water in a suspended state, characterized in that, The sheet forming the main body of the bathtub has a joint on the side wall portion that joins the sheets together.

9. The bath tub according to claim 8, characterized in that, When viewed from above in its usability state, where hot water is stored in the bathtub body, the bathtub body is rectangular. The joint extends vertically from the center of the sidewall portion forming the defined edge in the top view.

10. The bath tub according to claim 8, characterized in that, When viewed from above in its usability state, where hot water is stored in the bathtub body, the bathtub body is rectangular. The joint extends vertically from the center of the sidewall portion forming the short side in the top view.

11. The bathtub according to any one of claims 8 to 10, characterized in that, The joint consists of molten heat-fused material sandwiched between the overlapping sheets.

12. The bathtub according to claim 11, characterized in that, The joint will be formed by stitching the overlapping sheets together in a manner that allows the heat-fused material to pass through.

13. The bathtub according to any one of claims 8 to 10, characterized in that, The main body of the bathtub is formed from a single sheet of material.

14. The bathtub according to any one of claims 8 to 10, characterized in that, The sheet has a fabric and a layer of non-permeable material overlapping the fabric.

15. The bathtub according to any one of claims 8 to 10, characterized in that, In the usage state where hot water is stored in the bathtub body, the upper edge of the bathtub body has a folded-back portion that folds back outward, and the overlapping sheets in the folded-back portion are sewn together.

16. A bathtub, characterized in that, have: The bathtub body is made of sheet material and is used to store hot water while suspended. A rope is arranged along the upper edge of the bathtub body in the suspended state. The bathtub body has a folded portion formed by folding back the outer edge of the sheet constituting the bathtub body. The rope has a loop portion formed by folding back the end of the rope. The end of the clasp in the rope that closes the clasp is housed inside the fold-back section. The end of the lifting ring and the folded-back section are sewn together with thread. The line extends from a first facet in the folded-back section, located on one side of the end of the ring, to the end of the ring and a second facet in the folded-back section, located on the other side of the end of the ring.

17. The bath tub according to claim 16, characterized in that, The pair of ropes forming the end of the sling in the rope are sewn together by a thread.

18. The bathtub according to claim 16 or 17, characterized in that, The first face and the second face are stitched together along the edge of the rope material that forms the end of the sling.

19. The bathtub according to claim 16 or 17, characterized in that, It has a reinforcing sheet overlapping the outer side of the folded-back portion. The reinforcing sheet has a first reinforcing portion overlapping the first facet and a second reinforcing portion overlapping the second facet. The folded-back portion and the reinforcing sheet are sewn together by thread. The line extends from the first reinforcing part to the first face, the end of the lifting ring, the second face, and the second reinforcing part.

20. The bath tub according to claim 19, characterized in that, The first and second reinforcing parts are stitched together along the edge of the rope material that forms the end of the lifting ring.

21. A bath tub, characterized in that, The bathtub body is made of sheet material and is designed to store hot water while suspended. The bathtub body has a bathtub drain outlet for discharging the accumulated hot water.

22. The bath tub according to claim 21, characterized in that, When the bathtub body is suspended in the bathroom and used to store hot water, the drain outlet of the bathtub is located above the bathroom floor away from the bathroom.

23. The bathtub according to claim 21 or 22, characterized in that, The opening diameter of the bathtub drain is less than 40mm.

24. The bathtub according to claim 21 or 22, characterized in that, The bathtub drain outlet is equipped with a drain plug that can be opened and closed from the inside of the bathtub body.

25. The bathtub according to claim 21 or 22, characterized in that, The main body of the bath tub has a through hole that forms the drain outlet of the bath tub. A reinforcing member is provided to reinforce the outer edge of the through hole.

26. A bathroom, characterized in that, It includes a suspension part that suspends the bath tub as described in any one of claims 1 to 25.

27. A bathroom, characterized in that, Includes bathroom flooring. The bathroom floor has a bathroom drain outlet, which is located on the side of the bathtub drain outlet when the bathtub is suspended and hot water is stored for use.

28. The bathroom according to claim 27, characterized in that, It has entrances and exits. The bathroom drain outlet is located on the wall side opposite the entrance / exit.

29. A method for drying a bath, characterized in that, The bath tub according to any one of claims 1 to 25 is suspended in the drying suspension part and dried.

30. The bath drying method according to claim 29, characterized in that, The drying suspension unit is positioned higher than the suspension unit used when hot water is stored in the bath.

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