JP6908839B2 - Bathtub drainage structure - Google Patents

Description

Aspects of the present invention generally relate to the structure of the drainage portion of the bathtub.

The bathtub has a drainage port on the bottom surface for discharging the bathtub water (hot water stored in the bathtub) to the outside. On the downstream side of the drainage port of the bathtub, a drainage port connection part connected to the drainage port of the bathtub from below and a drainage flow path part for draining the bathtub water flowing from the drainage port connection part are provided. Has been done.

In addition, drainage is for the purpose of passing an operation wire for opening and closing the drain plug installed at the drain port of the bathtub and for providing a drain port for discharging the water flowing from the bathtub pan where the bathtub is installed. An enlarged space portion having a flow path cross-sectional area larger than the flow path cross-sectional area of the port connection portion is provided between the drain port connection portion and the drain port flow path portion (see, for example, Patent Document 1). ).

In such a bathtub drainage structure, the sealed water is often shared with the drainage section on the floor side of the washing place. In this case, since the height of the sealed water is defined by the drainage portion on the floor side of the washing place, it is difficult to control the height of the sealed water on the drainage portion side of the bathtub. As a result, the height of the sealed water tends to be higher than the bottom surface of the enlarged space. If the height of the sealed water is higher than the bottom surface of the expanded space, the amount of sealed water in the expanded space increases, and it becomes difficult to replace the sealed water in the expanded space even when the bathtub water is discharged. It ends up. In addition, the sealing water is basically formed by sewage such as bathtub water and drainage from the floor side of the washing place. As described above, since it is difficult to replace the sealing water formed by the sewage in the expanded space portion, dirt and the like are likely to occur in the expanded space portion. Such stains may cause foul odors and the like.

Further, the drainage part on the bathtub side is more difficult for the user to clean than the drainage part on the floor side of the washing place, and it is very difficult to remove dirt generated in the enlarged space part. For this reason, in the bathtub drainage structure, even when an enlarged space is provided between the drain connection and the drain flow path, dirt and the like generated in the expanded space can be easily removed. Is desired.

Japanese Unexamined Patent Publication No. 2014-1296999

The present invention has been made based on the recognition of such a problem, and is a bathtub drainage part structure capable of easily removing dirt and the like generated in the enlarged space part between the drainage port connection part and the drainage port flow path part. The purpose is to provide.

The first invention is a tub drainage structure which is provided on the downstream side of the drainage port of the tub and discharges the tub water discharged from the tub to the drainage part on the floor side of the washing place. It has a drainage port connection portion connected from below, a bottom surface provided below the drainage port connection portion, an inner wall surface surrounding the outer periphery of the bottom surface, and a drainage hole provided on the bottom surface. An enlarged space portion having a flow path cross-sectional area larger than the flow path cross-sectional area of the drainage port connection portion is formed by the bottom surface and the inner wall surface, and the sealed water can be stored in the expanded space portion. The drainage channel portion is provided with a drainage flow path portion for flowing the bath water discharged from the drainage hole to the drainage portion on the floor side of the washing place, and the drainage port connection portion has a protruding portion protruding downward and the protruding portion. The lower end of the water is located below the highest position of the sealed water stored in the expanded space and above the bottom surface, and has a gap between the bottom surface and the expanded space portion. A semi-concealed space surrounded by the inner wall surface and the protruding portion is provided in the expanded space, and when the tub water is drained, a part of the tub water is introduced into the semi-concealed space through the gap. It is a tub drainage part structure characterized in that a vertical swirling flow is generated in the semi-concealed space by inflowing.

In this bathtub drainage structure, a semi-concealed space is provided in the expanded space, and when the bathtub water is discharged, one of the bathtub water is formed in the semi-concealed space through the gap between the bottom surface of the expanded space and the protruding portion. The part is flowing in. When the bathtub water flows into the semi-concealed space, since the space is semi-concealed, a strong vertical swirling flow is formed in the semi-concealed space due to the internal pressure of the flowing bathtub water. As a result, even when dirt or the like is generated in the expanded space portion, the dirt or the like generated in the expanded space portion can be washed away by this strong vertical swirling flow every time the bathtub water is discharged. Therefore, it is possible to easily remove the dirt and the like generated in the enlarged space without requiring the user or the like to take the trouble of removing the parts and cleaning the inside of the enlarged space.

The second invention is the bathtub drainage portion structure according to the first invention, wherein the drainage hole has an elongated hole shape extending in the drainage direction of the drainage flow path portion from the protruding portion.

According to this bathtub drainage section structure, by forming the drainage hole into an elongated hole shape, it is possible to facilitate the flow of the bathtub water into the drainage channel section when the bathtub water is discharged. Furthermore, the vertical swirling flow formed in the semi-concealed space is stripped off by the vertical swirling flow due to the pulling force of the bathtub water discharged from the drainage hole extending in the drainage direction of the drainage flow path from the protruding portion. It can be easily discharged to the drainage channel along with the dirt. Therefore, it is possible to prevent the dirt and the like that have been peeled off by the vertical swirling flow from remaining in the enlarged space portion, and it is possible to more reliably wash away the dirt and the like generated in the enlarged space portion.

A third invention is the tub drainage portion structure according to the second invention, wherein the vertical width of the drainage hole and the width in the direction orthogonal to the drainage direction become wider toward the drainage direction.

According to this tub drainage section structure, when the vertical swirl flow flows from the drain hole into the drainage channel section directly below the drainage hole and collides with the side wall surface of the drainage channel section, the energy of the vertical swirl rotation Can be used for energy in the drainage direction of the drainage channel. Therefore, the drainage speed in the drainage channel can be increased, and the vertical swirling flow can be more easily discharged to the drainage channel.

In the fourth aspect of the invention, in any one of the first to third aspects, the distance between the inner wall surface and the protruding portion in the direction orthogonal to the vertical direction is toward the drainage direction of the drainage flow path portion. It is a tub drainage part structure characterized in that it becomes longer according to.

According to this bathtub drainage structure, the difference in the distance between the inner wall surface and the protruding portion can cause a pressure difference that lowers the pressure in the semi-concealed space toward the drainage direction of the drainage flow path. can. Therefore, it is possible to facilitate the vertical swirling flow toward the drainage direction of the drainage flow path portion where the pressure becomes low. As a result, the vertical swirling flow can be more easily discharged to the drainage flow path portion.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the protruding portion has a tubular shape, and the drainage port connecting portion uses the bathtub water flowing from the drainage port to the protruding portion. It is a bathtub drainage part structure characterized by passing through the inside and flowing into the expanded space part.

According to this bathtub drainage structure, the bathtub water flowing from the bathtub drainage port is quickly flowed into the drainage hole, and a part of the bathtub water flowing from the bathtub drainage port is expanded. It can be quickly flowed into the semi-concealed space through the gap between the protrusions.

According to the aspect of the present invention, there is provided a bathtub drainage section structure capable of easily removing dirt and the like generated in the enlarged space section between the drainage port connection portion and the drainage port flow path portion.

It is a top view which shows typically the bathroom unit which concerns on embodiment. It is sectional drawing which shows a part of the bathroom unit which concerns on embodiment schematically. It is an exploded perspective view which shows a part of the bathroom unit which concerns on embodiment schematically. It is sectional drawing which shows typically the bathtub drainage part structure which concerns on embodiment. It is sectional drawing which shows typically the bathtub drainage part structure which concerns on embodiment. It is a perspective view which shows typically the connection pipe which concerns on embodiment.

Hereinafter, embodiments will be described with reference to the drawings. In each drawing, similar components are designated by the same reference numerals and detailed description thereof will be omitted as appropriate.
FIG. 1 is a plan view schematically showing the bathroom unit according to the embodiment.
As shown in FIG. 1, the bathroom unit 2 includes a bathtub 10 and a washing floor 20. The bathtub 10 is arranged side by side with the washing floor 20 in the horizontal direction orthogonal to the vertical direction. The bathroom unit 2 is, for example, a so-called unit bath or system bath in which a bathtub 10, a washing floor 20, a wall panel, a ceiling panel, and the like are unitized.

The bathtub 10 has, for example, a bathtub main body 11, a drain port 12, a drain plug 13, and an operation unit 14. The bathtub body 11 is concave and has a bottom surface 11a and an upper end surface (rim surface) 11b surrounding the bottom surface 11a.

The drain port 12 is provided on the bottom surface 11a of the bathtub body 11 so that the hot water (hereinafter referred to as bathtub water) stored in the bathtub body 11 can be discharged to the outside. The drain plug 13 is attached to the drain port 12 and opens and closes the drain port 12. The operation unit 14 is provided on the upper end surface 11b of the bathtub main body 11. The operation unit 14 is connected to the drain plug 13 via an operation wire 16 (see FIGS. 4 and 5) and transmits the operating force to the drain plug 13. As a result, the drain plug 13 is switched between a closed state in which the drain port 12 is closed and an open state in which the drain port 12 is opened, according to the operation of the operation unit 14. By closing the drain plug 13, the bathtub water can be stored in the bathtub body 11. Then, by opening the drain plug 13, the bathtub water stored in the bathtub main body 11 is discharged to the outside from the drain port 12.

The washing place floor 20 has a floor body 21 and a drainage port member 22. The drainage port member 22 has a drainage port 23, and discharges hot water flowing from the floor surface 21a of the floor body 21 to the outside from the drainage port 23. The drainage port member 22 is arranged near the boundary between the bathtub 10 and the washing place floor 20, for example. The drainage port 23 is arranged so as to be linearly aligned with the drainage port 12 of the bathtub 10 in the direction in which the bathtub 10 and the washing place floor 20 are lined up, for example. The drainage port member 22 is attached to the floor body 21 substantially integrally with the floor body 21, for example, by adhesion or the like.

FIG. 2 is a cross-sectional view schematically showing a part of the bathroom unit according to the embodiment.
FIG. 3 is an exploded perspective view schematically showing a part of the bathroom unit according to the embodiment.
FIG. 2 schematically shows the cross section of the A1-A2 line of FIG.
As shown in FIGS. 2 and 3, the bathroom unit 2 further includes a washing place floor drainage section structure 30 and a bathtub drainage section structure 40.

The washroom floor drainage structure 30 has, for example, a drainage trap 31 and a water bottle 32. The drain trap 31 is in the shape of a container capable of storing sealed water in the internal space. The drain trap 31 is attached below the drain port member 22 via, for example, a tightening flange 33 and a packing 34, and is connected to the drain port 23. The drain trap 31 has a drain port 31a. The discharge port 31a is connected to a pipe (not shown), and is connected to an external drain pipe or the like via this pipe. As a result, the drainage that has flowed into the drainage port 23 of the washing place floor 20 is discharged to an external drainage pipe or the like via the drainage trap 31 or the like.

The water bottle 32 is attached to the drain port 23 from above. The lower end of the water bottle 32 is positioned below the highest position MHP of the sealed water stored in the drain trap 31 in a state of being attached to the drain port 23. That is, the lower end of the water bottle 32 is immersed in the water seal. As a result, it is possible to prevent odors and pests flowing back through the discharge port 31a from invading the bathroom. The highest position MHP of the sealed water is defined by, for example, the weir portion 31b on the discharge port 31a side of the drain trap 31.

For example, a hair catcher 35 is attached to the water bottle 32. The hair catcher 35 is formed in a mesh shape and suppresses the invasion of hair, dust, etc. into the drain pipe. The hair catcher 35 is detachably attached to the water bottle 32 so that the captured hair, dust, and the like can be easily thrown away.

Further, as shown in FIG. 2, the washing place floor 20 further has a cover 24. The cover 24 fits into the opening of the drainage port member 22 and covers the upper part of the drainage port 23. The cover 24 forms a slight gap between the cover 24 and the opening of the drain port member 22, and is substantially flush with the floor surface 21a of the floor body 21 while allowing hot water to be drained from the gap to the drain port 23. As a result, the drainage port 23 can be covered to improve the aesthetic appearance of the bathroom, and it is possible to prevent the user or the like from getting caught in the recess of the drainage port member 22. Note that FIG. 1 shows a state in which the cover 24 is removed for convenience.

The bathtub drainage structure 40 has a waterproof pan 41, a connection pipe 42, and a connection plate 43. The waterproof pan 41 is provided below the bathtub body 11 (bathtub 10). In other words, the bathtub body 11 is provided on the waterproof pan 41. The waterproof pan 41 receives hot water and the like leaking from the bathtub main body 11 and suppresses the hot water and the like leaking from the bathtub main body 11 from flowing into the building frame. The waterproof pan 41 has a connection opening 41a for connecting the connection pipe 42 and the connection plate 43.

One end of the connection pipe 42 is connected to the drain trap 31. The other end of the connection pipe 42 is connected to the waterproof pan 41. The connection pipe 42 is connected from below to the connection opening 41a of the waterproof pan 41 via, for example, the tightening flange 44 and the packing 45.

The connection plate 43 is attached to the waterproof pan 41 by, for example, screwing. The connection plate 43 is attached to the waterproof pan 41 from above and closes the connection opening 41a from above.

The connection plate 43 has a bathtub connection portion 43a used for connecting the bathtub body 11 to the drain port 12. The bathtub connecting portion 43a has, for example, a tubular shape extending upward, and has a through hole for flowing the bathtub water discharged from the drain port 12 in a state of being connected to the drain port 12. The bathtub connecting portion 43a is connected to the drainage port 12 from below by, for example, co-tightening the periphery of the drainage port 12 of the bathtub main body 11 with the tightening flange 46.

The bathtub water stored in the bathtub 10 is discharged to the drain trap 31 via the drain port 12, the bathtub connection portion 43a, the connection opening 41a, and the connection pipe 42. As described above, the bathtub drainage part structure 40 is provided on the downstream side of the drainage port 12 of the bathtub 10, and the bathtub water discharged from the bathtub 10 is discharged to the washing place floor drainage part structure 30. The structure of the bathtub drainage part structure 40 is not limited to the above, and may be any structure capable of discharging the bathtub water to the washing place floor drainage part structure 30 side.

4 and 5 are cross-sectional views schematically showing the bathtub drainage structure according to the embodiment.
FIG. 4 schematically shows a cross section taken along line A1-A2 of FIG.
FIG. 5 schematically shows the cross section of the B1-B2 line of FIG.
As shown in FIGS. 4 and 5, the bathtub drainage section structure 40 has a drainage port connection section 50, an enlarged space section 60, and a drainage channel section 70.

The drainage port connection portion 50 is connected to the drainage port 12 of the bathtub 10 from below. In this example, the drainage port connecting portion 50 is composed of, for example, a connecting plate 43 and a tightening flange 46.

The enlarged space portion 60 is provided below the drain port connecting portion 50. The enlarged space portion 60 has a bottom surface 61, an inner wall surface 62 surrounding the outer periphery of the bottom surface 61, and a drain hole 63 provided on the bottom surface 61. The enlarged space portion 60 forms an enlarged space 64 having a flow path cross-sectional area S2 larger than the flow path cross-sectional area S1 of the drainage port connecting portion 50 by the bottom surface 61 and the inner wall surface 62. At least a part of the expanded space 64 is located below the highest position MHP of the sealing water defined by the washroom floor drainage structure 30. As a result, the expanded space portion 60 can store the sealed water in the expanded space 64.

In this example, the enlarged space portion 60 is composed of, for example, a connecting pipe 42, a connecting plate 43, a tightening flange 44, and the like. The flow path cross-sectional area S1 of the drainage port connecting portion 50 is, for example, the flow path cross-sectional area of the tightening flange 46. The flow path cross-sectional area S2 of the enlarged space portion 60 is, for example, the flow path cross-sectional area of the tightening flange 44.

The drainage flow path portion 70 flows the bathtub water discharged from the drainage hole 63 to the washing place floor drainage portion structure 30. In this example, the drainage flow path portion 70 is composed of, for example, a connecting pipe 42.

The drainage port connecting portion 50 has a protruding portion 52 protruding downward. The lower end 52b of the protrusion 52 is located below the highest position MHP of the sealing water stored in the expanded space 64 and above the bottom surface 61, and has a gap SP with the bottom surface 61.

The protruding portion 52 has, for example, a tubular shape. The drainage port connection portion 50 allows the bathtub water flowing from the drainage port 12 to pass through the inside of the protrusion 52 and flow into the enlarged space portion 60. In this example, the protrusion 52 is provided on the connection plate 43. The protruding portion 52 is provided continuously with, for example, the through hole of the bathtub connecting portion 43a. As a result, the bathtub water can be passed through the inside of the protrusion 52.

At least a part of the drain hole 63 is located directly below the protrusion 52. As a result, the bathtub water passing through the inside of the protruding portion 52 can be smoothly flowed to the drain hole 63 and the drainage flow path portion 70. For example, the drainage speed of the bathtub water stored in the bathtub 10 can be increased as compared with the case where the protrusion 52 is not provided.

The shape of the protruding portion 52 is not limited to the tubular shape, and may be any shape having a lower end 52b that protrudes downward and is located below the highest position MHP of the sealing water and above the bottom surface 61.

The expanded space portion 60 has a semi-concealed space 65 surrounded by a bottom surface 61, an inner wall surface 62, and a protruding portion 52 in the expanded space 64. When the bathtub water is discharged, the expanded space portion 60 causes a part of the bathtub water to flow into the semi-concealed space 65 from the gap SP, thereby generating a vertical swirling flow RF in the semi-concealed space 65.

More specifically, the vertical swirling flow RF flows into the semi-concealed space 65 from the gap SP, and then swivels up and down along the bottom surface 61, the inner wall surface 62, the ceiling surface of the enlarged space portion 60, and the protruding portion 52. The vertical swirl flow RF flows toward the drain hole 63 while repeating the above swirl, and is discharged from the drain hole 63 to the washing place floor drainage portion structure 30 side.

The vertical distance (distance of the gap SP) between the lower end 52b of the protrusion 52 and the drain hole 63 is, for example, 5 mm or more and 15 mm or less. As a result, the semi-concealed space 65 can be appropriately formed, and the vertical swirling flow RF can be appropriately generated. Further, the lower end 52b of the protruding portion 52 is brought close to the drain hole 63, and as described above, the bathtub water passing through the inside of the protruding portion 52 can be smoothly flowed to the drain hole 63 and the drainage flow path portion 70.

As shown in FIGS. 4 and 5, the bathtub 10 further includes, for example, an elevating mechanism 15 and an operating wire 16. The elevating mechanism 15 is attached in the vicinity of the drain port 12. In this example, the elevating mechanism 15 is attached to the connection plate 43 so as to have a predetermined height with respect to the drain port 12. More specifically, the elevating mechanism 15 is fitted and attached to the inside of the tubular protrusion 52. The elevating mechanism 15 is connected to the drain plug 13. The elevating mechanism 15 switches the drain plug 13 between an open state and a closed state by raising and lowering the drain plug 13.

One end of the operation wire 16 is connected to the operation unit 14. The other end of the operation wire 16 is connected to the elevating mechanism 15. As a result, the operating force of the operating unit 14 is transmitted to the elevating mechanism 15 via the operating wire 16, and the drain plug 13 moves up and down according to the operation of the operating unit 14.

The connection plate 43 has an insertion port 43b for inserting the operation wire 16. The operation wire 16 is inserted into the expansion space 64 of the expansion space portion 60 via the insertion port 43b, and is connected to the elevating mechanism 15 from below in the expansion space 64.

One end of the tube 17 is connected to the insertion port 43b. The other end of the tube 17 is connected to, for example, the operation unit 14. The tube 17 is flexible, for example, and can be bent in any direction together with the operating wire 16. By connecting the insertion port 43b and the operation unit 14 with the tube 17 in this way, it is possible to prevent the bathtub water or the like that has flowed into the enlarged space portion 60 from leaking to the outside from the insertion port 43b. be able to.

Further, the connection plate 43 is provided with a drain valve (not shown). The connection plate 43 allows hot water or the like leaking to the waterproof pan 41 to flow into the expanded space 60 through the drain valve. As a result, the hot water leaked to the waterproof pan 41 can be appropriately drained to the washing place floor drainage structure 30 side and the external drainage pipe.

In this way, the enlarged space portion 60 is used as a space for inserting the operation wire 16 and receiving the drainage from the waterproof pan 41. The expanded space portion 60 is required in, for example, the bathroom unit 2 provided with at least one of the elevating drain plug 13 and the waterproof pan 41.

FIG. 6 is a perspective view schematically showing the connection pipe according to the embodiment.
As shown in FIG. 6, the drainage hole 63 has an elongated hole shape extending in the drainage direction WDD of the drainage flow path portion 70 from the protrusion 52. The width BW in the vertical direction of the drainage hole 63 and in the direction orthogonal to the drainage direction WDD becomes wider toward the drainage direction WDD.

Further, as shown in FIGS. 4 and 6, the projecting portion 52 is arranged so as to be offset from the center of the enlarged space portion 60 in the direction opposite to the drainage direction WDD. Therefore, the distance between the inner wall surface 62 and the projecting portion 52 in the direction orthogonal to the vertical direction becomes longer toward the drainage direction WDD of the drainage flow path portion 70. For example, as shown in FIG. 6, the distance L1 on the drainage direction WDD side is longer than the distance L2 on the side opposite to the drainage direction WDD.

As described above, in the bathroom unit 2 and the bathtub drainage section structure 40 according to the present embodiment, the semi-concealed space 65 is provided in the expanded space section 60, and when the bathtub water is discharged, the expanded space section 60 is provided. A part of the bathtub water is allowed to flow into the semi-concealed space 65 from the gap SP between the bottom surface 61 and the protruding portion 52. When the bathtub water flows into the semi-concealed space 65, since the space is semi-concealed, the vertical swirling flow RF is formed in the semi-concealed space 65 due to the internal pressure of the flowing bathtub water. By providing the protruding portion 52 and providing a relatively narrow semi-concealed space 65 in the expanded space portion 60, a relatively strong vertical swirling flow RF can be formed.

As a result, even if dirt or the like is generated in the expanded space portion 60, the dirt or the like generated in the expanded space portion 60 can be washed away by this strong vertical swirling flow every time the bathtub water is discharged. .. For example, dirt generated in the expanded space 60 can be stripped off by a relatively strong vertical swirling flow RF. Here, "dirt generated in the expanded space 60" means, for example, bacteria propagated in the expanded space 60, a biofilm formed by the bacteria on the surface, molds propagated on the surface of the biofilm, and the like. be. Therefore, it is possible to easily remove the dirt and the like generated in the enlarged space 60 without requiring the user or the like to take the trouble of removing the parts and cleaning the inside of the enlarged space 60.

Further, by providing the protruding portion 52, the vertical distance between the lower end 52b of the protruding portion 52 and the drain hole 63 can be shortened. As a result, the bathtub water can be smoothly flowed to the drain hole 63 and the drainage channel 70. For example, the drainage speed of the bathtub water stored in the bathtub 10 can be increased as compared with the case where the protrusion 52 is not provided.

Further, in the bathroom unit 2 and the bathtub drainage section structure 40, by forming the drainage hole 63 into an elongated hole shape, it is possible to facilitate the flow of the bathtub water into the drainage channel section 70 when the bathtub water is discharged. Further, the vertical swirling flow RF formed in the semi-concealed space 65 is moved up and down by the drawing force of the bathtub water discharged from the drain hole 63 extending in the drainage direction WDD of the drainage channel 70 from the protrusion 52. The dirt peeled off by the swirling flow RF can be easily discharged to the drainage channel 70. Therefore, it is possible to prevent the dirt and the like that have been peeled off by the vertical swirling flow RF from remaining in the expanded space portion 60, and it is possible to more reliably wash away the dirt and the like generated in the expanded space portion 60.

Further, in the bathroom unit 2 and the bathtub drainage section structure 40, the horizontal width BW of the drainage hole 63 in the vertical direction and in the direction orthogonal to the drainage direction WDD becomes wider toward the drainage direction WDD. As a result, when the vertical swirling flow RF flows from the drainage hole 63 into the drainage flow path portion 70 directly below the drainage hole 63 and collides with the side wall surface 70s (see FIG. 6) of the drainage flow path portion 70, A part of the energy of the rotation of the vertical rotation can be used for the energy toward the drainage direction WDD of the drainage flow path portion 70 according to the inclination of the side wall surface 70s that widens toward the drainage direction WDD. Therefore, the drainage speed in the drainage channel 70 can be increased, and the vertical swirling flow RF can be more easily discharged to the drainage channel 70.

Further, in the bathroom unit 2 and the bathtub drainage portion structure 40, the distance between the inner wall surface 62 and the projecting portion 52 in the direction orthogonal to the vertical direction becomes longer toward the drainage direction WDD of the drainage flow path portion 70. Due to such a difference in the distance between the inner wall surface 62 and the protruding portion 52, a pressure difference that lowers the pressure in the semi-concealed space 65 can be generated toward the drainage direction of the drainage flow path portion 70.

For example, as shown in FIG. 6, in the semi-concealed space 65 (enlarged space portion 60), a region R1 having a relatively high pressure and regions R2 and R3 having a pressure lower than the region R1 can be provided. .. Therefore, it is possible to facilitate the vertical swirling flow RF toward the drainage direction WDD of the drainage flow path portion 70 where the pressure becomes low. For example, flows f1 and f2 from the region R1 to the regions R2 and R3 can be formed. As a result, the vertical swirling flow RF can be more easily discharged to the drainage flow path portion 70.

Further, in the bathroom unit 2 and the bathtub drainage portion structure 40, the protruding portion 52 has a tubular shape, and the drainage port connecting portion 50 allows the bathtub water flowing from the drainage port 12 to pass through the inside of the protruding portion 52 to expand the space. It is made to flow into the part 60. As a result, the bathtub water that has flowed in from the drainage port 12 of the bathtub 10 is promptly flowed into the drainage hole 63, and a part of the bathtub water that has flowed in from the drainage port 12 of the bathtub 10 is tubular with the bottom surface 61 of the enlarged space portion 60. It is possible to quickly flow into the semi-concealed space 65 from the gap SP between the protrusion 52 and the semi-concealed space 65.

The embodiments of the present invention have been described above. However, the present invention is not limited to these descriptions. With respect to the above-described embodiment, those skilled in the art with appropriate design changes are also included in the scope of the present invention as long as they have the features of the present invention. For example, the shape, dimensions, material, arrangement, and the like of each element included in the bathroom unit 2 and the bathtub drainage structure 40 are not limited to those illustrated and can be changed as appropriate.
In addition, the elements included in each of the above-described embodiments can be combined as much as technically possible, and the combination thereof is also included in the scope of the present invention as long as the features of the present invention are included.

2 Bathroom unit, 10 tub, 11 tub body, 12 drain, 13 drain plug, 14 operation unit, 15 lifting mechanism, 16 operation wire, 17 tube, 20 washroom floor, 21 floor body, 22 drain member, 23 drain , 24 Cover, 30 Washroom Floor Drainage Structure, 31 Drainage Trap, 32 Water Sealing Cylinder, 33 Tightening Flange, 34 Packing, 35 Hair Catcher, 40 Bath Drainage Structure, 41 Waterproof Pan, 42 Connection Piping, 43 Connection Plate, 44 Tightening flange, 45 packing, 46 Tightening flange, 50 Drainage port connection, 52 Protruding part, 60 Expanded space, 61 Bottom surface, 62 Inner wall surface, 63 Drain hole, 64 Expanded space, 65 Semi-concealed space, 70 Drainage flow Road

Claims (5)

It is a bathtub drainage structure that is provided on the downstream side of the drainage port of the bathtub and discharges the bathtub water discharged from the bathtub to the drainage section on the floor side of the washing place.
A drainage port connection portion connected to the drainage port of the bathtub from below,
It has a bottom surface, an inner wall surface surrounding the outer circumference of the bottom surface, and a drainage hole provided on the bottom surface, which is provided below the drainage port connection portion, and is larger than the flow path cross-sectional area of the drainage port connection portion. An expanded space portion having an enlarged space having a large flow path cross-sectional area formed by the bottom surface and the inner wall surface so that sealed water can be stored in the expanded space.
A drainage channel portion for flowing the bathtub water discharged from the drainage hole to the drainage portion on the floor side of the washing place, and a drainage flow path portion.
With
The drainage port connection portion has a protruding portion protruding downward, and has a protruding portion.
The lower end of the protruding portion is located below the highest position of the sealing water stored in the expanded space and above the bottom surface, and has a gap between the protruding portion and the bottom surface.
The expanded space portion has a semi-concealed space surrounded by the bottom surface, the inner wall surface, and the protruding portion in the expanded space, and when the bathtub water is discharged, the semi-concealed space is formed through the gap. A bathtub drainage structure, characterized in that a vertical swirling flow is generated in the semi-concealed space by allowing a part of the bathtub water to flow into the bathtub. The bathtub drainage portion structure according to claim 1, wherein the drainage hole has an elongated hole shape extending from the protruding portion in the drainage direction of the drainage flow path portion. The tub drainage section structure according to claim 2, wherein the vertical width of the drainage hole and the lateral width in the direction orthogonal to the drainage direction become wider toward the drainage direction. One of claims 1 to 3, wherein the distance between the inner wall surface and the protruding portion in a direction orthogonal to the vertical direction becomes longer toward the drainage direction of the drainage flow path portion. The described tub drainage structure. The protruding portion has a tubular shape and has a tubular shape.
The drainage port connecting portion according to any one of claims 1 to 4, wherein the bathtub water flowing from the drainage port passes through the inside of the protruding portion and flows into the expanded space portion. Bathtub drainage structure.

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