Bathroom unit

Abstract

To provide a bathroom unit that allows easy connection between drainage traps and connecting pipes under a floor pan without the need for a frame, and enables appropriate drainage gradient to be achieved in the connecting pipes without the use of a level gauge or the like.SOLUTION: A bathroom unit comprises; a floor pan; a bathtub; a drainage trap with first to fourth water-guide parts; and a curved connecting pipe connecting the drainage trap to a drainage pipe. The connecting pipe comprises: a first part connected to the fourth water-guide part and extending in a first direction; a second part located downstream of the first part; and a curved part bending between the first part and the second part. The drainage trap and the connecting pipe have a first regulating part regulating rotation about the first direction with respect to the fourth water-guide part of the first part as an axis, and the second part extends in a second direction intersecting the first direction with the rotation of the first part regulated by the first regulating part, and inclines downward as the second part moves away from the curved part.SELECTED DRAWING: Figure 4

Description

Technical Field

[0006] , ,

[0003]

[0001] Aspects of the present invention generally relate to bathroom units.

Background Art

[0002] There is known a bathroom unit that is installed by assembling a floor pan, a bathtub, and a bath apron at a construction site. In such a bathroom unit, a drain trap is provided between the drain parts of the floor pan and the bathtub and the drain pipe in order to flow the water from the floor pan and the bathtub to the drain pipe.

[0003] Normally, when assembling a bathroom unit, after assembling the floor pan, the bathtub, and the drain trap, etc., the drain trap is connected to the drain pipe via a connecting pipe. For example, in the bathroom unit of Patent Document 1, since a pedestal is provided under the floor pan, the drain trap and the connecting pipe can be connected while visually checking the connecting part from the inspection opening provided in the pedestal. However, since such a pedestal is usually composed of metal members, there is a problem that the manufacturing cost of the bathroom unit increases when a pedestal is provided under the floor pan.

[0004] On the other hand, when no pedestal is provided under the floor pan, the connecting part cannot be visually checked from the inspection opening. Therefore, for example, it is required to connect the drain trap and the connecting pipe while looking into the space under the floor pan from the side, and there is a problem that it is difficult to connect the drain trap and the connecting pipe.

[0005] Also, when connecting the drain trap and the connecting pipe, it is necessary to take an appropriate drainage gradient for the connecting pipe in order to drain water at an appropriate speed. However, when no pedestal is provided under the floor pan, the connecting part cannot be visually checked from the inspection opening. Therefore, for example, it is required to take a drainage gradient using a level, etc., while looking into the space under the floor pan from the side, and there is a problem that it is difficult to take a drainage gradient.

Prior Art Documents

Patent Documents

[0006] [Patent Document 1] Patent No. 5656023 [Overview of the project] [Problems that the invention aims to solve]

[0007] The embodiments of the present invention are based on the recognition of the above problems and aim to provide a bathroom unit that allows for easy connection of a drain trap and a connecting pipe without the need to provide a support frame under the floor pan, and that allows for easy creation of an appropriate drainage slope for the connecting pipe without the need to use a spirit level or the like. [Means for solving the problem]

[0008] The first invention comprises a floor pan having a bathroom floor and a first drain section provided in the bathroom floor; a bathtub having a bathtub body and a second drain section provided in the bathtub body; a drain trap having a first water guide section connected to the first drain section, a second water guide section connected to the second drain section, a third water guide section connected to the first water guide section and the second water guide section and extending in a first direction, and a fourth water guide section connected downstream of the third water guide section and extending in a first direction; and a bent connecting pipe connecting the drain trap and a drain pipe, wherein the connecting pipe is front The bathroom unit comprises a first portion connected to a fourth water supply section and extending in the first direction, a second portion located downstream of the first portion, and a bent portion that bends between the first and second portions, wherein the drain trap and the connecting pipe have a first restricting portion that restricts the rotation of the first portion about the first direction relative to the fourth water supply section, and the second portion extends in a second direction intersecting the first direction while the rotation of the first portion is restricted by the first restricting portion, and inclined downward as it moves away from the bent portion.

[0009] With this bathroom unit, by connecting a bent connecting pipe downstream of the fourth water guide section of the drain trap, the position of the connection point can be easily recognized even when connecting the drain trap and connecting pipe while looking into the space under the floor pan from the side (towards the side where the bathtub is located) along the first direction. This makes it easy to connect the drain trap and connecting pipe without installing a support frame under the floor pan. Furthermore, with the rotation of the first part restricted by the first restricting section, the second part extends in the second direction and slopes downward as it moves away from the bent section, allowing the second part to be fixed in a downward-sloping state when extended in the second direction. This makes it easy to set the appropriate drainage slope for the connecting pipe without using a spirit level or similar when extending the second part in the second direction. In addition, by providing the fourth water guide section downstream of the third water guide section and extending in the same first direction as the third water guide section (i.e., downstream on a straight line from the third water guide section), the drainage speed can be increased compared to the case where the fourth water guide section is provided perpendicular to the third water guide section.

[0010] The second invention is a bathroom unit in which, in the first invention, the first restricting portion has a first upstream projection provided on the outer surface of the fourth water guide portion and a first downstream projection provided on the outer surface of the first portion, and the rotation of the first portion is restricted by bringing the first upstream projection and the first downstream projection into contact.

[0011] This bathroom unit features a first restricting section that restricts the rotation of the first section by bringing together a first upstream protrusion on the outer surface of the fourth water conduit and a first downstream protrusion on the outer surface of the first section. This allows for more reliable restriction of the rotation of the first section by the first restricting section. As a result, it becomes easier to achieve an appropriate drainage slope in the connecting pipe without using a spirit level or similar device. Furthermore, if the structure restricts rotation by bringing the two protrusions into contact, the first section can be rotated relative to the fourth water conduit until its rotation is restricted. This allows for wider application of adhesive to the bonding surface when fixing the first section and the fourth water conduit using adhesive.

[0012] The third invention is a bathroom unit in which, in the first or second invention, the drain trap and the connecting pipe have a second restricting portion that restricts the rotation of the first portion of the first part with respect to the fourth water supply portion as an axis in the first direction, and the second portion extends in a third direction that intersects the first direction and is different from the second direction, while the rotation of the first portion is restricted by the second restricting portion, and inclined downward as it moves away from the bent portion.

[0013] With this bathroom unit, the rotation of the first part is restricted by the second restricting part, and the second part extends in the third direction while tilting downwards as it moves away from the bend. This allows the second part to be fixed in a downward-tilted position when extended in the third direction. As a result, the appropriate drainage slope can be easily achieved for the connecting pipe without using a spirit level or similar device, not only when the second part is extended in the second direction, but also when it is extended in the third direction. Therefore, even if the positional relationship between the drain trap and the drain pipe differs from one construction site to another, the same connecting pipe can be used by switching the direction of the bend in the connecting pipe.

[0014] The fourth invention is a bathroom unit in which, in the third invention, the first restricting part has a first upstream projection provided on the outer surface of the fourth water guide part and a first downstream projection provided on the outer surface of the first part, and restricts the rotation of the first part by bringing the first upstream projection and the first downstream projection into contact, and the second restricting part has a first upstream projection and a second downstream projection provided on the outer surface of the first part, and restricts the rotation of the first part by bringing the first upstream projection and the second downstream projection into contact.

[0015] This bathroom unit provides a first restricting section that restricts the rotation of the first section by bringing together a first upstream protrusion on the outer surface of the fourth water intake section and a first downstream protrusion on the outer surface of the first section, and a second restricting section that restricts the rotation of the first section by bringing together the first upstream protrusion and a second downstream protrusion on the outer surface of the first section. This allows for more reliable restriction of the rotation of the first section by the first and second restricting sections. As a result, an appropriate drainage slope can be easily achieved in the connecting pipe without using a spirit level or the like, not only when the second section is extended in the second direction, but also when the second section is extended in the third direction. Therefore, even if the positional relationship between the drain trap and the drain pipe differs from one construction site to another, the same connecting pipe can be used by switching the direction of the bend in the connecting pipe.

[0016] The fifth invention is a bathroom unit in which, in the third invention, the first restricting part has a first upstream projection provided on the outer surface of the fourth water guide and a first downstream projection provided on the outer surface of the first part, and restricts the rotation of the first part by bringing the first upstream projection and the first downstream projection into contact, and the second restricting part has a second upstream projection provided on the outer surface of the fourth water guide and a first downstream projection, and restricts the rotation of the first part by bringing the second upstream projection and the first downstream projection into contact.

[0017] This bathroom unit provides a first restricting section that restricts the rotation of the first section by bringing together a first upstream protrusion on the outer surface of the fourth water conduit and a first downstream protrusion on the outer surface of the first section, and a second restricting section that restricts the rotation of the first section by bringing together a second upstream protrusion on the outer surface of the fourth water conduit and the first downstream protrusion. This allows for more reliable restriction of the rotation of the first section by the first and second restricting sections. As a result, an appropriate drainage slope can be easily achieved in the connecting pipe without using a spirit level or the like, not only when the second section is extended in the second direction, but also when the second section is extended in the third direction. Therefore, even if the positional relationship between the drain trap and the drain pipe differs from one construction site to another, the same connecting pipe can be used by switching the direction of the bend in the connecting pipe.

[0018] The sixth invention is a bathroom unit in which, in the third invention, the first restricting part has a first upstream projection provided on the outer surface of the fourth water guide and a first downstream projection provided on the outer surface of the first part, and restricts the rotation of the first part by bringing the first upstream projection and the first downstream projection into contact, and the second restricting part has a second upstream projection provided on the outer surface of the fourth water guide and a second downstream projection provided on the outer surface of the first part, and restricts the rotation of the first part by bringing the second upstream projection and the second downstream projection into contact.

[0019] This bathroom unit provides a first restricting section that restricts the rotation of the first section by bringing together a first upstream protrusion on the outer surface of the fourth water conduit and a first downstream protrusion on the outer surface of the first section, and a second restricting section that restricts the rotation of the first section by bringing together a second upstream protrusion on the outer surface of the fourth water conduit and a second downstream protrusion on the outer surface of the first section. This allows for more reliable restriction of the rotation of the first section by the first and second restricting sections. As a result, an appropriate drainage slope can be easily achieved in the connecting pipe without using a spirit level or the like, not only when the second section is extended in the second direction, but also when the second section is extended in the third direction. Therefore, even if the positional relationship between the drain trap and the drain pipe differs from one construction site to another, the same connecting pipe can be used by switching the direction of the bend in the connecting pipe. [Effects of the Invention]

[0020] According to an aspect of the present invention, a bathroom unit is provided in which a drain trap and a connecting pipe can be easily connected without providing a support frame under the floor pan, and an appropriate drainage slope can be easily created in the connecting pipe without using a spirit level or the like. [Brief explanation of the drawing]

[0021] [Figure 1] This is a perspective view showing a part of the bathroom unit according to the embodiment, viewed from diagonally above. [Figure 2] This is a perspective view showing a part of the bathroom unit according to the embodiment, viewed from a diagonal downward angle. [Figure 3] It is an exploded perspective view of a part of a bathroom unit according to an embodiment. [Figure 4] It is a perspective view showing a drain trap and a connecting pipe according to an embodiment. [Figure 5] It is an exploded perspective view of a fourth water guiding part of a drain trap and a connecting pipe according to an embodiment. [Figure 6] FIGS. 6(a) and 6(b) are top views and bottom views of a fourth water guiding part of a drain trap and a connecting pipe according to an embodiment in a state where rotation is restricted by a first restricting part. [Figure 7] FIGS. 7(a) and 7(b) are top views and bottom views of a fourth water guiding part of a drain trap and a connecting pipe according to an embodiment in a state where rotation is restricted by a second restricting part. [Figure 8] FIGS. 8(a) and 8(b) are schematic views showing a state where rotation is restricted by a first restricting part or a second restricting part in another example of a fourth water guiding part of a drain trap and a connecting pipe according to an embodiment. [Figure 9] FIGS. 9(a) and 9(b) are schematic views showing a state where rotation is restricted by a first restricting part or a second restricting part in another example of a fourth water guiding part of a drain trap and a connecting pipe according to an embodiment. [Figure 10] It is an exploded perspective view of a fourth water guiding part of a drain trap and a connecting pipe according to a modification of an embodiment. [Figure 11] FIGS. 11(a) and 11(b) are top views and bottom views of a fourth water guiding part of a drain trap and a connecting pipe according to a modification of an embodiment in a state where rotation is restricted by a first restricting part. [Figure 12] FIGS. 12(a) and 12(b) are top views and bottom views of a fourth water guiding part of a drain trap and a connecting pipe according to a modification of an embodiment in a state where rotation is restricted by a second restricting part.

Embodiments for Carrying Out the Invention

[0022] Embodiments of the present invention will be described below with reference to the drawings. In each drawing, similar components are denoted by the same reference numerals, and detailed descriptions are omitted as appropriate. Figure 1 is a perspective view showing a part of the bathroom unit according to the embodiment, viewed from diagonally above. Figure 2 is a perspective view showing a part of the bathroom unit according to the embodiment, viewed from diagonally below. Figure 3 is an exploded perspective view of a part of the bathroom unit according to the embodiment. Figure 4 is a perspective view showing a drain trap and connecting pipe according to an embodiment. As shown in Figures 1 to 4, the bathroom unit 100 according to this embodiment includes a floor pan 10, a bathtub 20, a bath apron 25, a drain trap 30, a connecting pipe 40, and a connector 50. The bathroom unit 100 is installed, for example, on the installation surface S of the building structure.

[0023] The floor pan 10 is installed on a first installation surface S1, which is part of the installation surface S. The floor pan 10 has a bathroom floor 11, a first drain section 12, and a plurality of support legs 13.

[0024] The bathroom floor 11 has a floor portion 11a and an edge portion 11b. The floor portion 11a is a flat plate that extends horizontally. The floor portion 11a is used as a washing area. The edge portion 11b is provided at the end of the floor portion 11a on the bathtub 20 side and includes a portion that extends upward. The bathroom floor 11 functions, for example, as a washing area floor. Also, if the bathroom unit 100 is installed in a hotel or the like, a toilet or the like may be installed on the bathroom floor 11.

[0025] The first drain section 12 is provided in the floor portion 11a of the bathroom floor 11. The first drain section 12 is provided to drain water from the bathroom floor 11 (floor portion 11a). The water from the bathroom floor 11 (floor portion 11a) is discharged to the drain trap 30 via the first drain section 12. In this example, a drain cover 14 is provided to cover the first drain section 12 from above.

[0026] Multiple support legs 13 are provided beneath the bathroom floor 11 and support the bathroom floor 11. At least some of the multiple support legs 13 are provided beneath the floor portion 11a. Some of the multiple support legs 13 may be provided beneath the edge portion 11b. The multiple support legs 13 are installed directly on, for example, the first installation surface S1. In other words, the bathroom floor 11 is installed directly on the first installation surface S1, for example, via the multiple support legs 13. The bathroom floor 11 is installed on the first installation surface S1, for example, without a frame.

[0027] In this example, six support legs 13 are provided. The number of support legs 13 is not limited to six; it can be four or more. Preferably, the length of the support legs 13 in the vertical direction can be changed.

[0028] The bathtub 20 is installed on a second installation surface S2, which is another part of the installation surface S. The second installation surface S2 is adjacent to the first installation surface S1 in the horizontal direction. In other words, the bathtub 20 is positioned adjacent to the floor pan 10 in the horizontal direction. The bathtub 20 has a bathtub body 21, a second drain section 22, and a plurality of support legs 23.

[0029] The bathtub body 21 is box-shaped with an open top. In plan view, the shape of the bathtub body 21 is approximately rectangular. The bathtub body 21 has a bottom surface 21a, a side surface 21b, and a rim surface 21c. The bottom surface 21a is located at the bottom of the bathtub body 21 and constitutes the bottom of the bathtub body 21. The side surface 21b extends upward from the outer circumference of the bottom surface 21a and constitutes the side wall of the bathtub body 21. The side surface 21b has a pair of longitudinal side surfaces 21b1 that extend along the longitudinal direction of the bathtub body 21 and a pair of transverse side surfaces 21b2 that extend along the transverse direction of the bathtub body 21. The rim surface 21c extends horizontally from the upper end of the side surface 21b toward the outside of the bathtub body 21 (opposite side from the bottom surface 21a) and constitutes the upper end of the bathtub body 21. A portion of the rim portion 21c on the floor pan 10 side overlaps with the edge 11b of the bathroom floor 11 in the vertical direction. In this example, a portion of the rim portion 21c on the floor pan 10 side overlaps with the edge 11b of the bathroom floor 11 in the vertical direction, but it is not necessary for them to overlap.

[0030] The second drain section 22 is provided on the bottom surface 21a of the bathtub body 21. The second drain section 22 is provided to drain water from inside the bathtub body 21 (the area enclosed by the bottom surface 21a and the side surface 21b). The water inside the bathtub body 21 is discharged to the drain trap 30 via the second drain section 22. The second drain section 22 is provided with a drain plug (not shown) for starting and stopping drainage from the second drain section 22.

[0031] Multiple support legs 23 are provided beneath the bathtub body 21 and support the bathtub body 21. Multiple support legs 23 are provided beneath the bottom surface 21a. Multiple support legs 23 are installed directly on, for example, the second installation surface S2. In other words, the bathtub body 21 is installed directly on the second installation surface S2, for example, via the multiple support legs 23. The bathtub body 21 is installed on the second installation surface S2, for example, without a frame.

[0032] In this example, four support legs 23 are provided. The number of support legs 23 is not limited to four; there may be four or more. Preferably, the length of the support legs 23 can be changed in the vertical direction.

[0033] By directly installing multiple support legs 23 on the installation surface S (second installation surface S2), the bathtub body 21 can be directly installed on the installation surface S via the multiple support legs 23. Furthermore, the vertical position of the bathtub body 21 can be adjusted using the multiple support legs 23. In other words, the bathtub body 21 can be positioned at a desired vertical position without the need for a separate support frame.

[0034] The drain trap 30 is installed beneath the floor pan 10 and the bathtub 20. More specifically, the drain trap 30 is installed between the installation surface S (first installation surface S1) and the floor pan 10, and between the installation surface S (second installation surface S2) and the bathtub 20.

[0035] As shown in Figures 2 to 4, the drain trap 30 has a first water guide section 31, a second water guide section 32, a third water guide section 33, and a fourth water guide section 34. The third water guide section 33 is connected to the first water guide section 31 and the second water guide section 32 and extends in the first direction D1. The fourth water guide section 34 is connected downstream of the third water guide section 33 and extends in the first direction D1.

[0036] The upper end (upstream end) of the first water guide section 31 is connected to the first drain section 12 of the floor pan 10. The upper end (upstream end) of the second water guide section 32 is connected to the second drain section 22 of the bathtub 20. The lower end (downstream end) of the first water guide section 31 and the lower end (downstream end) of the second water guide section 32 are connected to the third water guide section 33. In this example, the position where the first water guide section 31 is connected to the third water guide section 33 is located downstream of the position where the second water guide section 32 is connected. The end of the third water guide section 33 opposite to the second water guide section 32 (downstream end) is connected to the upstream end of the fourth water guide section 34. The third water guide section 33 is the region from the position where it overlaps with the second water guide section 32 in a top view to the position where it overlaps with the first water guide section 31 in a top view. In other words, the upstream end of the third water conduit 33 is the connection point with the second water conduit 32. Also, the downstream end of the third water conduit 33 is the connection point with the first water conduit 31. The downstream end of the fourth water conduit 34 is connected to the connecting pipe 40.

[0037] The first water guide section 31, the second water guide section 32, the third water guide section 33, and the fourth water guide section 34 may be an integrated unit or separate units. Furthermore, the first water guide section 31, the second water guide section 32, the third water guide section 33, and the fourth water guide section 34 may each consist of one component or multiple components.

[0038] In this example, the fourth water conduit 34 is an eccentric pipe. That is, the central axis of the upstream end of the fourth water conduit 34 does not coincide with the central axis of the downstream end of the fourth water conduit 34. The fourth water conduit 34 does not have to be an eccentric pipe.

[0039] If the fourth water guide section 34 is provided perpendicular to the third water guide section 33 and a drain pipe is connected to the fourth water guide section, a sufficient drainage speed may not be obtained. In contrast, by providing the fourth water guide section 34 downstream of the third water guide section 33 and extending in the same first direction D1 as the third water guide section 33 (i.e., downstream on a straight line with the third water guide section 33), the drainage speed can be increased compared to the case where the fourth water guide section 34 is provided perpendicular to the third water guide section 33. As a result, a sufficient drainage speed can be obtained, and even if the bathtub has high drainage capacity, for example, it can maintain high drainage capacity without causing drainage problems such as water overflowing from the floor.

[0040] The connecting pipe 40 connects the drain trap 30 to a drain pipe (not shown). In other words, the connecting pipe 40 is located downstream of the drain trap 30 and upstream of the drain pipe. The connecting pipe 40 is bent. The structure of the connecting pipe 40 will be described later.

[0041] Water on the bathroom floor 11 flows from the first drain section 12 of the floor pan 10 through the first water guide section 31 of the drain trap 30 to the third water guide section 33 and the fourth water guide section 34, and is discharged to the outside of the bathroom unit 100 through the drain pipe via the connecting pipe 40. Water inside the bathtub body 21 flows from the second drain section 22 of the bathtub 20 through the second water guide section 32 of the drain trap 30 to the third water guide section 33 and the fourth water guide section 34, and is discharged to the outside of the bathroom unit 100 through the drain pipe via the connecting pipe 40.

[0042] The bath apron 25 is provided in the vertical direction between the floor pan 10 and the bathtub 20. More specifically, the bath apron 25 is provided in the vertical direction between the edge 11b of the bathroom floor 11 and the rim 21c of the bathtub body 21. The bath apron 25 covers at least a portion of the side of the bathtub body 21. More specifically, the bath apron 25 covers at least a portion of the side portion 21b of the bathtub body 21. In this example, the bath apron 25 covers at least a portion of the longitudinal side portion 21b1 of the bathtub body 21. Note that Figure 2 shows the bath apron 25 removed. The bath apron 25 is fixed, for example, to the bathtub body 21 and the connector 50.

[0043] The connector 50 is provided in the vertical direction between the floor pan 10 and the bathtub 20. More specifically, the connector 50 is provided in the vertical direction between the edge 11b of the bathroom floor 11 and the rim 21c of the bathtub body 21. The connector 50 connects the floor pan 10 and the bathtub 20. The connector 50 prevents the bathtub 20 from tilting toward the floor pan 10. The connector 50 is fixed to the floor pan 10 and the bathtub 20 by screws or the like.

[0044] In this example, two connectors 50 (a first connector 51 and a second connector 52) are provided. The first connector 51 is provided at one end of the bathtub 20 in the longitudinal direction. The second connector 52 is provided at the other end of the bathtub 20 in the longitudinal direction. Note that the number of connectors 50 is not limited to two; there may be one or three or more. For example, if there is only one, it may be provided in the shape of a plate extending in the longitudinal direction of the bathtub 20.

[0045] The connection between the drain trap 30 and the connecting pipe 40 according to this embodiment will be described below. Figure 5 is an exploded perspective view of the fourth water intake section and connecting pipe of the drain trap according to this embodiment. Figures 6(a) and 6(b) are top and bottom views, respectively, of the fourth water guide section and connecting pipe of the drain trap according to the embodiment, in a state where rotation is restricted by the first restricting section. Figures 7(a) and 7(b) are top and bottom views, respectively, of the fourth water guide section and connecting pipe of the drain trap according to the embodiment, in a state where rotation is restricted by the second restricting section.

[0046] As shown in Figure 5, the connecting pipe 40 has a first section 41, a second section 42, and a bent section 43. The first section 41 is connected to the fourth water intake section 34 of the drain trap 30. The first section 41 extends in a first direction D1. The second section 42 is located downstream of the first section 41. The second section 42 extends in a direction intersecting the first direction D1. The second section 42 extends in a direction different from the first direction D1. The bent section 43 bends between the first section 41 and the second section 42. The bent section 43 bends, for example, at a 90-degree angle.

[0047] In this way, by connecting the bent connecting pipe 40 downstream of the fourth water guide section 34 of the drain trap 30, the position of the connection can be easily recognized even when connecting the drain trap 30 and the connecting pipe 40 while looking into the space below the floor pan 10 from the side (towards where the bathtub 20 is located) along the first direction D1. This makes it possible to easily connect the drain trap 30 and the connecting pipe 40 without having to install a support frame below the floor pan 10.

[0048] The first section 41 and the fourth water conduit 34 are connected, for example, such that the central axis of the first section 41 coincides with the central axis of the downstream end of the fourth water conduit 34. In this example, the first section 41 and the fourth water conduit 34 are connected by the upstream end of the first section 41 being inserted into the downstream end of the fourth water conduit 34. Alternatively, the first section 41 and the fourth water conduit 34 may be connected by the downstream end of the fourth water conduit 34 being inserted into the upstream end of the first section 41. The first section 41 and the fourth water conduit 34 are fixed together, for example, with an adhesive.

[0049] When the first part 41 and the fourth water guide section 34 are not fixed, the first part 41 is rotatable about the first direction D1 as an axis relative to the fourth water guide section 34. When connecting the first part 41 and the fourth water guide section 34, it is necessary to provide an appropriate drainage slope to the second part 42 in order to allow drainage to flow at an appropriate speed. The slope of the second part 42 is determined by the rotational position of the first part 41 relative to the fourth water guide section 34. In other words, the first part 41 is required to be fixed relative to the fourth water guide section 34 at a rotational position that allows for an appropriate drainage slope to be provided to the second part 42.

[0050] Therefore, in this embodiment, the drain trap 30 and the connecting pipe 40 are provided with a first restricting section 61. The first restricting section 61 restricts the rotation of the first section 41 with respect to the fourth water guide section 34, with respect to the first direction D1 as the axis.

[0051] As shown in Figures 6(a) and 6(b), in this example, a first upstream projection 71a is provided on the outer surface 34s of the fourth water conduit 34. The first upstream projection 71a protrudes outward from the outer surface 34s of the fourth water conduit 34. In addition, in this example, a first downstream projection 71b is provided on the outer surface 41s of the first portion 41 of the connecting pipe 40. The first downstream projection 71b protrudes outward from the outer surface 41s of the first portion 41. Furthermore, the first downstream projection 71b protrudes toward the fourth water conduit 34 toward the outer surface 41s of the first portion 41.

[0052] In this example, the first restricting portion 61 has a first upstream projection 71a and a first downstream projection 71b. The first restricting portion 61 restricts the rotation of the first portion 41 by bringing the first upstream projection 71a and the first downstream projection 71b into contact with each other. In other words, the first upstream projection 71a and the first downstream projection 71b function as the first restricting portion 61 that restricts the rotation of the first portion 41 by coming into contact with each other.

[0053] The second portion 42 extends in a second direction D2 while the rotation of the first portion 41 is restricted by the first restricting portion 61. The second direction D2 intersects the first direction D1. The angle between the first direction D1 and the second direction D2 is, for example, 90 degrees. The second portion 42 slopes downward as it moves away from the bent portion 43 while the rotation of the first portion 41 is restricted by the first restricting portion 61. The slope of the second portion 42 while the rotation of the first portion 41 is restricted by the first restricting portion 61 is, for example, 1 / 50.

[0054] In this way, with the rotation of the first part 41 restricted by the first restricting part 61, the second part 42 extends D2 in the second direction and tilts downward as it moves away from the bent part 43, thereby allowing the second part 42 to be fixed in a downward tilted state when extended in the second direction D2. As a result, when the second part 42 is extended in the second direction D2, an appropriate drainage slope can be easily obtained for the connecting pipe 40 (second part 42) without the need for a spirit level or the like.

[0055] Furthermore, by providing a first restricting portion 61 that restricts the rotation of the first portion 41 by bringing together a first upstream projection 71a provided on the outer surface 34s of the fourth water guide portion 34 and a first downstream projection 71b provided on the outer surface 41s of the first portion 41, the rotation of the first portion 41 can be restricted more reliably by the first restricting portion 61. As a result, it is possible to more easily obtain an appropriate drainage slope for the connecting pipe 40 (second portion 42) without using a spirit level or the like.

[0056] Furthermore, if the structure restricts rotation by bringing the two protrusions into contact, the first part 41 can be rotated relative to the fourth water guiding part 34 until rotation is restricted. This allows the first part 41 and the fourth water guiding part 34 to be fixed together with adhesive, enabling the adhesive to be applied to a wider area of ​​the bonding surface by rotating the first part 41 relative to the fourth water guiding part 34.

[0057] Furthermore, as shown in Figures 5, 6(a), 6(b), 7(a), and 7(b), in this example, a second restricting section 62 is provided on the drain trap 30 and the connecting pipe 40. The second restricting section 62 restricts the rotation of the first section 41 with respect to the fourth water guide section 34, with respect to the first direction D1 as the axis.

[0058] The second restricting unit 62 restricts rotation in the opposite direction to that of the first restricting unit 61. In other words, if the first restricting unit 61 restricts clockwise rotation, the second restricting unit 62 restricts counterclockwise rotation. If the first restricting unit 61 restricts counterclockwise rotation, the second restricting unit 62 restricts clockwise rotation. The second restricting unit 62 can be provided as needed and is optional.

[0059] As shown in Figures 7(a) and 7(b), in this example, in addition to the first upstream projection 71a and the first downstream projection 71b described above, a second downstream projection 72b is provided on the outer surface 41s of the first portion 41 of the connecting pipe 40. The second downstream projection 72b protrudes outward from the outer surface 41s of the first portion 41. Furthermore, the second downstream projection 72b protrudes toward the fourth water intake section 34 from the outer surface 41s of the first portion 41.

[0060] In this example, the second restricting portion 62 has a first upstream protrusion 71a and a second downstream protrusion 72b. The second restricting portion 62 restricts the rotation of the first portion 41 by bringing the first upstream protrusion 71a and the second downstream protrusion 72b into contact with each other. In other words, the first upstream protrusion 71a and the second downstream protrusion 72b function as the second restricting portion 62 that restricts the rotation of the first portion 41 by coming into contact with each other.

[0061] The second portion 42 extends in a third direction D3 while the rotation of the first portion 41 is restricted by the second restricting portion 62. The third direction D3 is a direction that intersects with the first direction D1. The third direction D3 is a different direction from the second direction D2. The angle between the first direction D1 and the third direction D3 is, for example, 90 degrees. The angle between the second direction D2 and the third direction D3 is, for example, 180 degrees. The second portion 42 slopes downward as it moves away from the bent portion 43 while the rotation of the first portion 41 is restricted by the second restricting portion 62. The slope of the second portion 42 while the rotation of the first portion 41 is restricted by the second restricting portion 62 is, for example, 1 / 50.

[0062] In this way, with the rotation of the first portion 41 restricted by the second restricting portion 62, the second portion 42 extends in the third direction D3 and tilts downward as it moves away from the bent portion 43, thereby fixing the second portion 42 in a downward tilted state when extended in the third direction D3. As a result, an appropriate drainage slope can be easily obtained for the connecting pipe 40 (second portion 42) not only when the second portion 42 is extended in the second direction D2, but also when the second portion 42 is extended in the third direction D3, without the need for a spirit level or the like. Therefore, even if the positional relationship between the drain trap 30 and the drain pipe differs from one construction site to another, the same connecting pipe 40 can be used by switching the direction of the bend of the connecting pipe 40.

[0063] Furthermore, by providing a first restricting section 61 that restricts the rotation of the first section 41 by bringing into contact a first upstream projection 71a provided on the outer surface 34s of the fourth water guide section 34 and a first downstream projection 71b provided on the outer surface 41s of the first section 41, and by providing a second restricting section 62 that restricts the rotation of the first section 41 by bringing into contact a first upstream projection 71a and a second downstream projection 72b provided on the outer surface 41s of the first section 41, the rotation of the first section 41 can be restricted more reliably by the first restricting section 61 and the second restricting section 62. As a result, an appropriate drainage slope can be easily obtained for the connecting pipe 40 (second section 42) without using a spirit level or the like, not only when the second section 42 is extended in the second direction D2, but also when the second section 42 is extended in the third direction D3. Therefore, even if the positional relationship between the drain trap 30 and the drain pipe differs at each construction site, the same connecting pipe 40 can be used by switching the direction of the bend in the connecting pipe 40.

[0064] The first regulating section 61 and the second regulating section 62 may have two upstream protrusions provided on the fourth water guide section 34 and one downstream protrusion provided on the first section 41, as described above; or they may have one upstream protrusion provided on the fourth water guide section 34 and two downstream protrusions provided on the first section 41, as described later; or they may have two upstream protrusions provided on the fourth water guide section 34 and two downstream protrusions provided on the first section 41, as described later.

[0065] Figures 8(a) and 8(b) are schematic diagrams showing another example of the fourth water intake section and connecting pipe of the drain trap according to the embodiment, in which rotation is restricted by the first restricting section or the second restricting section. As shown in Figures 8(a) and 8(b), in this example, the first regulating section 61 and the second regulating section 62 have one upstream projection provided on the fourth water intake section 34 and two downstream projections provided on the first section 41. Otherwise, they are substantially the same as the drain trap 30 and connecting pipe 40 shown in Figures 5, 6(a), 6(b), 7(a), and 7(b).

[0066] In this example, a first upstream projection 71a and a second upstream projection 72a are provided on the outer surface 34s of the fourth water conduit 34. The first upstream projection 71a and the second upstream projection 72a protrude outward from the outer surface 34s of the fourth water conduit 34. In this example, a first downstream projection 71b is provided on the outer surface 41s of the first portion 41 of the connecting pipe 40. The first downstream projection 71b protrudes outward from the outer surface 41s of the first portion 41. The first downstream projection 71b also protrudes toward the fourth water conduit 34 toward the first portion 41.

[0067] In this example as well, the first restricting portion 61 has a first upstream projection 71a and a first downstream projection 71b. The first restricting portion 61 restricts the rotation of the first portion 41 by bringing the first upstream projection 71a and the first downstream projection 71b into contact with each other. In other words, the first upstream projection 71a and the first downstream projection 71b function as the first restricting portion 61 that restricts the rotation of the first portion 41 by coming into contact with each other.

[0068] In this example, the second restricting portion 62 has a second upstream projection 72a and a first downstream projection 71b. The second restricting portion 62 restricts the rotation of the first portion 41 by bringing the second upstream projection 72a and the first downstream projection 71b into contact with each other. In other words, the second upstream projection 72a and the first downstream projection 71b function as the second restricting portion 62 that restricts the rotation of the first portion 41 by coming into contact with each other.

[0069] The second part 42 extends in the second direction D2 while the rotation of the first part 41 is restricted by the first restricting part 61. The second part 42 inclins downward as it moves away from the bent part 43 while the rotation of the first part 41 is restricted by the first restricting part 61. The second part 42 extends in the third direction D3 while the rotation of the first part 41 is restricted by the second restricting part 62. The second part 42 inclins downward as it moves away from the bent part 43 while the rotation of the first part 41 is restricted by the second restricting part 62.

[0070] In this way, a first restricting section 61 is provided that restricts the rotation of the first section 41 by bringing into contact a first upstream projection 71a provided on the outer surface 34s of the fourth water guide section 34 and a first downstream projection 71b provided on the outer surface 41s of the first section 41, and a second restricting section 62 is provided that restricts the rotation of the first section 41 by bringing into contact a second upstream projection 72a provided on the outer surface 34s of the fourth water guide section 34 and a first downstream projection 71b, respectively, thereby more reliably restricting the rotation of the first section 41 by the first restricting section 61 and the second restricting section 62. As a result, an appropriate drainage slope can be easily obtained for the connecting pipe 40 (second section 42) without using a spirit level or the like, not only when the second section 42 is extended in the second direction D2, but also when the second section 42 is extended in the third direction D3. Therefore, even if the positional relationship between the drain trap 39 and the drain pipe differs at each construction site, the same connecting pipe 40 can be used by switching the direction of the bend in the connecting pipe 40.

[0071] Figures 9(a) and 9(b) are schematic diagrams showing another example of the fourth water intake section and connecting pipe of the drain trap according to the embodiment, in a state where rotation is restricted by the first restricting section or the second restricting section. As shown in Figures 9(a) and 9(b), in this example, the first regulating section 61 and the second regulating section 62 have two upstream protrusions provided on the fourth water intake section 34 and two downstream protrusions provided on the first section 41. Otherwise, they are substantially the same as the drain trap 30 and connecting pipe 40 shown in Figures 5, 6(a), 6(b), 7(a), and 7(b).

[0072] In this example, a first upstream projection 71a and a second upstream projection 72a are provided on the outer surface 34s of the fourth water conduit 34. The first upstream projection 71a and the second upstream projection 72a protrude outward from the outer surface 34s of the fourth water conduit 34. In this example, a first downstream projection 71b and a second downstream projection 72b are provided on the outer surface 41s of the first portion 41 of the connecting pipe 40. The first downstream projection 71b and the second downstream projection 72b protrude outward from the outer surface 41s of the first portion 41. Furthermore, the first downstream projection 71b and the second downstream projection 72b protrude toward the fourth water conduit 34 toward the first portion 41.

[0073] In this example as well, the first restricting portion 61 has a first upstream projection 71a and a first downstream projection 71b. The first restricting portion 61 restricts the rotation of the first portion 41 by bringing the first upstream projection 71a and the first downstream projection 71b into contact with each other. In other words, the first upstream projection 71a and the first downstream projection 71b function as the first restricting portion 61 that restricts the rotation of the first portion 41 by coming into contact with each other.

[0074] In this example, the second restricting portion 62 has a second upstream projection 72a and a second downstream projection 72b. The second restricting portion 62 restricts the rotation of the first portion 41 by bringing the second upstream projection 72a and the second downstream projection 72b into contact with each other. In other words, the second upstream projection 72a and the second downstream projection 72b function as the second restricting portion 62 that restricts the rotation of the first portion 41 by coming into contact with each other.

[0075] The second part 42 extends in the second direction D2 while the rotation of the first part 41 is restricted by the first restricting part 61. The second part 42 inclins downward as it moves away from the bent part 43 while the rotation of the first part 41 is restricted by the first restricting part 61. The second part 42 extends in the third direction D3 while the rotation of the first part 41 is restricted by the second restricting part 62. The second part 42 inclins downward as it moves away from the bent part 43 while the rotation of the first part 41 is restricted by the second restricting part 62.

[0076] In this way, a first restricting section 61 is provided that restricts the rotation of the first section 41 by bringing into contact a first upstream protrusion 71a provided on the outer surface 34s of the fourth water guide section 34 and a first downstream protrusion 71b provided on the outer surface 41s of the first section 41, and a second restricting section 62 is provided that restricts the rotation of the first section 41 by bringing into contact a second upstream protrusion 72a provided on the outer surface 34s of the fourth water guide section 34 and a second downstream protrusion 72b provided on the outer surface 41s of the first section 41, thereby more reliably restricting the rotation of the first section 41 by the first restricting section 61 and the second restricting section 62. As a result, an appropriate drainage slope can be easily obtained for the connecting pipe 40 (second section 42) without using a spirit level or the like, not only when the second section 42 is extended in the second direction D2, but also when the second section 42 is extended in the third direction D3. Therefore, even if the positional relationship between the drain trap 30 and the drain pipe differs at each construction site, the same connecting pipe 40 can be used by switching the direction of the bend in the connecting pipe 40.

[0077] Furthermore, the first regulating section 61 and the second regulating section 62 may have an upstream projection provided on the fourth water guide section 34 and a downstream projection provided on the first section 41, as described above, or they may have a recess provided on one of the fourth water guide section 34 and the first section 41 and a projection provided on the other of the fourth water guide section 34 and the first section 41, as described later.

[0078] The following describes the connection between the fourth water intake section 34 of the drain trap 30A and the connecting pipe 40A according to a modified embodiment. Figure 10 is an exploded perspective view of the fourth water intake section and connecting pipe of a drain trap according to a modified embodiment. Figures 11(a) and 11(b) are top and bottom views, respectively, of the fourth water guide section and connecting pipe of a modified embodiment of a drain trap, in a state where rotation is restricted by the first restricting section. Figures 12(a) and 12(b) are top and bottom views, respectively, of the fourth water guide section and connecting pipe of a modified embodiment of a drain trap, in a state where rotation is restricted by the second restricting section.

[0079] As shown in Figures 10, 11(a), 11(b), 12(a), and 12(b), in this example, the first regulating section 61A and the second regulating section 62A have two recesses provided in the fourth water supply section 34 and two protrusions provided in the first section 41. Otherwise, they are substantially the same as the drain trap 30 and connecting pipe 40 shown in Figures 5, 6(a), 6(b), 7(a), and 7(b).

[0080] In this example, a first recess 81a and a second recess 82a are provided on the outer surface 34s of the fourth water guiding section 34. The first recess 81a and the second recess 82a are recessed from the first section 41 toward the fourth water guiding section 34. In this example, a first protrusion 81b and a second protrusion 82b are provided on the outer surface 41s of the first section 41 of the connecting pipe 40. The first protrusion 81b and the second protrusion 82b project toward the fourth water guiding section 34 from the first section 41.

[0081] In this example, the first restricting portion 61A includes a first recess 81a, a second recess 82a, a first protrusion 81b, and a second protrusion 82b. As shown in Figures 11(a) and 11(b), when the first protrusion 81b is fitted into the first recess 81a and the second protrusion 82b is fitted into the second recess 82a, the rotation of the first portion 41 is restricted. In other words, the combination of the first recess 81a and the first protrusion 81b, and the combination of the second recess 82a and the second protrusion 82b, function as the first restricting portion 61A that restricts the rotation of the first portion 41.

[0082] The second portion 42 extends in the second direction D2 while the rotation of the first portion 41 is restricted by the first restricting portion 61A. The second portion 42 inclines downward as it moves away from the bent portion 43 while the rotation of the first portion 41 is restricted by the first restricting portion 61A.

[0083] In this example, the second restricting portion 62A includes a first recess 81a, a second recess 82a, a first protrusion 81b, and a second protrusion 82b. As shown in Figures 12(a) and 12(b), when the second protrusion 82b is fitted into the first recess 81a and the first protrusion 81b is fitted into the second recess 82a, the rotation of the first portion 41 is restricted. In other words, the combination of the first recess 81a and the second protrusion 82b, and the combination of the second recess 82a and the first protrusion 81b, function as the second restricting portion 62A that restricts the rotation of the first portion 41.

[0084] The second portion 42 extends in the third direction D3 while the rotation of the first portion 41 is restricted by the second restricting portion 62A. The second portion 42 inclins downward as it moves away from the bent portion 43 while the rotation of the first portion 41 is restricted by the second restricting portion 62A.

[0085] In this example as well, with the rotation of the first part 41 restricted by the first restricting part 61A, the second part 42 extends D2 in the second direction and tilts downward as it moves away from the bent part 43, thereby allowing the second part 42 to be fixed in a downward tilted state when extended in the second direction D2. As a result, when the second part 42 is extended in the second direction D2, an appropriate drainage slope can be easily obtained for the connecting pipe 40 (second part 42) without the need for a spirit level or the like.

[0086] Furthermore, in this example as well, with the rotation of the first part 41 restricted by the second restricting part 62A, the second part 42 extends in the third direction D3 and tilts downward as it moves away from the bent part 43, thereby allowing the second part 42 to be fixed in a downward tilted state when extended in the third direction D3. As a result, an appropriate drainage slope can be easily obtained for the connecting pipe 40 (second part 42) not only when the second part 42 is extended in the second direction D2, but also when the second part 42 is extended in the third direction D3, without the need for a spirit level or the like. Therefore, even if the positional relationship between the drain trap 30 and the drain pipe differs from one construction site to another, the same connecting pipe 40 can be used by switching the direction of the bend of the connecting pipe 40.

[0087] The embodiment may include the following configurations.

[0088] (Composition 1) A floor pan having a bathroom floor and a first drainage section provided in the bathroom floor, A bathtub having a bathtub body and a second drainage section provided in the bathtub body, A drain trap comprising: a first water guide section connected to the first drain section; a second water guide section connected to the second drain section; a third water guide section connected to the first and second water guide sections and extending in a first direction; and a fourth water guide section connected downstream of the third water guide section and extending in a first direction; A bent connecting pipe that connects the drain trap and the drain pipe, Equipped with, The connecting pipe has a first portion connected to the fourth water intake section and extending in the first direction, a second portion located downstream of the first portion, and a bent portion that bends between the first portion and the second portion. The drain trap and the connecting pipe have a first restricting portion that restricts the rotation of the first portion about the first direction relative to the fourth water supply portion, A bathroom unit in which the second portion extends in a second direction intersecting the first direction, with the rotation of the first portion restricted by the first restricting portion, and inclined downward as it moves away from the bent portion.

[0089] (Configuration 2) The bathroom unit according to configuration 1, wherein the first restricting portion has a first upstream projection provided on the outer surface of the fourth water guide portion and a first downstream projection provided on the outer surface of the first portion, and the rotation of the first portion is restricted by bringing the first upstream projection and the first downstream projection into contact.

[0090] (Composition 3) The drain trap and the connecting pipe have a second restricting portion that restricts the rotation of the first portion of the first portion with respect to the fourth water supply portion as an axis in the first direction, The bathroom unit according to configuration 1 or 2, wherein the second portion extends in a third direction that intersects the first direction and is different from the second direction, with the rotation of the first portion restricted by the second restricting portion, and inclined downward as it moves away from the bent portion.

[0091] (Composition 4) The first restricting portion has a first upstream projection provided on the outer surface of the fourth water guide portion and a first downstream projection provided on the outer surface of the first portion, and restricts the rotation of the first portion by bringing the first upstream projection and the first downstream projection into contact. The bathroom unit according to configuration 3, wherein the second restricting portion has the first upstream protrusion and the second downstream protrusion provided on the outer surface of the first portion, and restricts the rotation of the first portion by bringing the first upstream protrusion and the second downstream protrusion into contact.

[0092] (Composition 5) The first restricting portion has a first upstream projection provided on the outer surface of the fourth water guide portion and a first downstream projection provided on the outer surface of the first portion, and restricts the rotation of the first portion by bringing the first upstream projection and the first downstream projection into contact. The bathroom unit according to configuration 3, wherein the second restricting portion has a second upstream projection and a first downstream projection provided on the outer surface of the fourth water intake portion, and restricts the rotation of the first portion by bringing the second upstream projection and the first downstream projection into contact.

[0093] (Composition 6) The first restricting portion has a first upstream projection provided on the outer surface of the fourth water guide portion and a first downstream projection provided on the outer surface of the first portion, and restricts the rotation of the first portion by bringing the first upstream projection and the first downstream projection into contact. The bathroom unit according to configuration 3, wherein the second restricting portion has a second upstream projection provided on the outer surface of the fourth water guide portion and a second downstream projection provided on the outer surface of the first portion, and the rotation of the first portion is restricted by bringing the second upstream projection and the second downstream projection into contact.

[0094] As described above, according to the embodiment, a bathroom unit is provided in which the drain trap and the connecting pipe can be easily connected without providing a support frame under the floor pan, and an appropriate drainage slope can be easily created in the connecting pipe without using a spirit level or the like.

[0095] Embodiments of the present invention have been described above. However, the present invention is not limited to these descriptions. Modifications made by those skilled in the art to the above-described embodiments are also included within the scope of the present invention, as long as they retain the features of the present invention. For example, the shape, dimensions, materials, and arrangement of each element of the bathroom unit are not limited to those exemplified and can be modified as appropriate. Furthermore, the elements of each of the embodiments described above can be combined to the extent technically possible, and these combinations are also included within the scope of the present invention insofar as they include the features of the present invention. [Explanation of symbols]

[0096] 10: Floor Bread 11: Bathroom floor 11a: Floor part 11b:Edge 12: 1st drainage section 13:Support leg 14: Drain cover 20: Bathtub 21: Bathtub body 21a: Bottom part 21b: Side part 21b1: Long side section 21b2:Short side part 21c: Rim section 22:Second drainage section 23:Support leg 25: Bath apron 30, 30A: Drain trap 31: First Water Intake Section 32: Second Water Intake Section 33: Third Water Intake Section 34: Fourth Water Intake Section 34s: External surface 40, 40A: Connecting pipe 41: Part 1 41s: External surface 42:Second part 43: Bent part 50: Connector 51: 1st connector 52:Second connector 61, 61A: First Regulatory Section 62, 62A: Second regulatory section 71a: First upstream convex part 71b: First downstream convex section 72a: Second upstream convex section 72b: Second downstream convex section 81a: First recess 81b: First protrusion 82a: Second recess 82b: Second protrusion 100: Bathroom Unit S: Installation surface S1: 1st installation surface S2: 2nd installation surface

Claims

1. A floor pan having a bathroom floor and a first drainage section provided in the bathroom floor, A bathtub having a bathtub body and a second drainage section provided in the bathtub body, A drain trap comprising: a first water guide section connected to the first drain section; a second water guide section connected to the second drain section; a third water guide section connected to the first and second water guide sections and extending in a first direction; and a fourth water guide section connected downstream of the third water guide section and extending in the first direction. A bent connecting pipe that connects the drain trap and the drain pipe, Equipped with, The connecting pipe has a first portion connected to the fourth water supply section and extending in the first direction, a second portion located downstream of the first portion, and a bent portion that bends between the first portion and the second portion. The drain trap and the connecting pipe have a first restricting portion that restricts the rotation of the first portion about the first direction relative to the fourth water supply portion, A bathroom unit in which the second portion extends in a second direction intersecting the first direction, with the rotation of the first portion restricted by the first restricting portion, and inclined downward as it moves away from the bent portion.

2. The bathroom unit according to claim 1, wherein the first restricting portion has a first upstream projection provided on the outer surface of the fourth water guide portion and a first downstream projection provided on the outer surface of the first portion, and the rotation of the first portion is restricted by bringing the first upstream projection and the first downstream projection into contact.

3. The drain trap and the connecting pipe have a second restricting portion that restricts the rotation of the first portion of the first portion with respect to the fourth water supply portion as an axis in the first direction, The bathroom unit according to claim 1 or 2, wherein the second portion extends in a third direction that intersects the first direction and is different from the second direction, with the rotation of the first portion restricted by the second restricting portion, and inclined downward as it moves away from the bent portion.

4. The first regulating portion has a first upstream projection provided on the outer surface of the fourth water guide portion and a first downstream projection provided on the outer surface of the first portion, and by bringing the first upstream projection and the first downstream projection into contact, the rotation of the first portion is restricted. The bathroom unit according to claim 3, wherein the second restricting portion has the first upstream protrusion and the second downstream protrusion provided on the outer surface of the first portion, and restricts the rotation of the first portion by bringing the first upstream protrusion and the second downstream protrusion into contact.

5. The first regulating portion has a first upstream projection provided on the outer surface of the fourth water guide portion and a first downstream projection provided on the outer surface of the first portion, and by bringing the first upstream projection and the first downstream projection into contact, the rotation of the first portion is restricted. The bathroom unit according to claim 3, wherein the second restricting portion has a second upstream projection and a first downstream projection provided on the outer surface of the fourth water guide portion, and restricts the rotation of the first portion by bringing the second upstream projection and the first downstream projection into contact.

6. The first regulating portion has a first upstream projection provided on the outer surface of the fourth water guide portion and a first downstream projection provided on the outer surface of the first portion, and by bringing the first upstream projection and the first downstream projection into contact, the rotation of the first portion is restricted. The bathroom unit according to claim 3, wherein the second restricting portion has a second upstream projection provided on the outer surface of the fourth water guide portion and a second downstream projection provided on the outer surface of the first portion, and the rotation of the first portion is restricted by bringing the second upstream projection and the second downstream projection into contact.

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