JP2000345777A - Drainage structure for bathroom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage structure for a bathroom, which can prevent a large volume of primary cut-off drainage or reversely flowing drainage from a drainage pipe from flowing via a drain gutter on a dressing room side and from leaking on the dressing room side, to a minimum. SOLUTION: There is provided a drainage structure for a bathroom, which conjoins between primary cut-off drainage which has been cut off by a first sealing member 53 to flow downward from a primary drainage opening 51 of a lower frame 12, and secondary cut-off drainage which has been cut off by a second sealing member 47 to flow downward from a secondary drainage opening 50 of the lower frame 12, to thereby lead the conjoined drainage into a drain gutter 7. In the drainage structure, a check valve 49 is interposed in a secondary drainage channel 56 on an upstream side of a confluent portion, for blocking inflow of the primary cut-off drainage on the side of the secondary drainage opening 50 and allowing inflow of the secondary cut-off drainage on the side of the drain gutter 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage structure for a bathroom in which a drainage groove for receiving floor drainage of the bathroom is provided around a fitting constituting an entrance of the bathroom.

[0002]

2. Description of the Related Art Conventionally, as a drainage structure for a bathroom of this kind,
For example, the one described in JP-A-9-303059 is known. In this drainage structure, the first seal member is provided between the bathroom side of the fitting body and the lower frame, and the second seal member is provided between the undressing room side of the fitting body and the lower frame. The primary water stoppage drain of the bathroom floor stopped by the first seal member is guided from the first drainage opening of the lower frame to the drainage groove, and the secondary water stoppage drainage leaks from the first seal member and is stopped by the second seal member. From the second drain opening of the lower frame to the drain.

[0003]

In such a conventional bathroom drainage structure, the primary water stoppage drainage and the secondary water stoppage drainage merge when passing through the first drainage opening and the second drainage opening, respectively. Flows into drains. That is, the drain route of the primary still drainage and the drain route of the secondary still drainage communicate with each other on the inflow side of the drain. For this reason, a large amount of primary water stoppage drainage is generated due to overflow of hot water in the bathtub, and when this flows into the drainage system in a concentrated manner, this drainage flows backward from the secondary water stoppage drainage channel to the second seal member side. However, water may leak from the second seal member. Similarly, when the drainage flows backward from the drainage pipe connected to the drainage system (connected to the main drainage pipe in the bathroom), the drained water flows back not only in the primary drainage drainage channel but also in the secondary stoppage. The water may also enter the drainage path of the water drainage, and this drainage may leak from the second seal member.

The present invention is directed to a bathroom drainage structure capable of preventing a large amount of primary still water and backflow drainage from a drain pipe from flowing to a dressing room side through a drain groove and leaking to the dressing room side as much as possible. Its purpose is to provide.

[0005]

According to the present invention, there is provided a drainage structure for a bathroom, comprising: a first sealing member interposed between a bathroom side of a fitting body and a lower frame of a frame; A second seal member interposed between the lower frame, a drain groove provided on the bathroom side of the lower frame to receive drainage of the bathroom floor, and a primary of the bathroom floor formed in the lower frame and stopped by the first seal member. A primary drainage opening for allowing the still water to flow down to the drainage ditch, and a secondary drainage opening formed in the lower frame and for allowing the secondary water stoppage of the bathroom floor stopped by the second seal member to flow down to the drainage ditch. In the drainage structure of the bathroom where the primary still water drained from the drain opening and the secondary still water drained from the secondary drain opening are merged and guided to the drain, the secondary drainage upstream of the junction In the flow channel, prevent the primary water stoppage drainage from flowing into the secondary drainage opening side, and to the secondary waterstop drainage side. Characterized in that a check valve that allows the flow is interposed.

[0006] According to this configuration, the primary water stoppage drainage stopped by the first seal member flows into the drain groove via the primary drainage opening of the lower frame, passes through the first seal member (leaks). Second
The secondary water drainage stopped by the seal member flows into the drainage ditch via the secondary drainage opening of the lower frame and the check valve. At this time, the secondary static drainage merges with the primary static drainage after passing through the check valve, and then flows into the drain. When a large amount of floor drainage occurs in the bathroom, a large amount of primary water stoppage drains down through the primary drainage opening, but the primary water stoppage drainage is prevented by the check valve and does not flow into the secondary drainage opening side . On the other hand, even when the drainage flows backward from the drainage pipe through the drainage groove, the backflow drainage is prevented by the check valve and does not flow into the secondary drainage opening side. Therefore, it is possible to effectively prevent the backflow drainage from reaching the second seal member via the secondary drainage channel.

[0007] In this case, the check valve has a valve element vertically swingably provided with the upper end portion as a fulcrum, and a valve seat to which the valve element is in close contact. Preferably, it is slightly inclined downstream with a gap therebetween.

According to this configuration, even when the amount of the secondary stoppage water is small, the drainage flows from the gap between the valve body and the valve seat to the drainage ditch, so that the secondary water stoppage drainage is caused by the weight of the valve body. Can be blocked and accumulated in the secondary drain passage can be prevented.

Further, the check valve may include a case provided with a valve seat and removably mounted in the secondary drain passage, and a valve body vertically swingably mounted on the case. ,preferable.

According to this configuration, the check valve can be easily assembled to the secondary drain passage. When the check valve fails, it can be easily replaced.

In these cases, it is preferable that the check valve and the primary drain opening are arranged so as to be displaced from each other in the finding direction.

According to this structure, when the amount of the primary stoppage water flowing down from the primary drainage opening is small, the check valve is hardly closed by the primary stoppage water, and the secondary stoppage water is passed through the check valve. The drainage can smoothly flow down the drain.

[0013] Another drainage structure for a bathroom according to the present invention comprises a first sealing member interposed between the bathroom side of the fitting body and the lower frame of the frame, and a first seal member interposed between the undressing room side of the fitting body and the lower frame. , A drain groove disposed on the bathroom side of the lower frame to receive drainage of the bathroom floor, and a primary water stop drainage formed on the lower frame and stopped by the first seal member. A primary drainage opening for flowing down to the drainage ditch, and a secondary drainage opening for allowing secondary water stoppage drainage of the bathroom floor formed in the lower frame and stopped by the second seal member to flow down to the drainage ditch, and flow down from the primary drainage opening. In the bathroom drainage structure where the primary water stoppage drainage and the secondary water stoppage drainage flowing down from the secondary drainage opening are merged and led to the drainage ditch, the primary stoppage flowing down from the primary drainage opening is provided at the junction. A guide member for guiding water drainage to the drainage groove side is provided.

According to this configuration, the primary water stoppage drainage stopped by the first seal member flows into the drainage groove via the primary drainage opening of the lower frame and the guide member, and passes through the first seal member ( The leaked secondary water drainage stopped by the second seal member flows into the drainage ditch via the secondary drainage opening of the lower frame. At this time, the secondary still water and the primary still water merge at the downstream side and then flow into the drain. However, since the primary still water smoothly flows into the drain by the guide member, The still water drainage is also drawn by the flow of the primary still water and smoothly flows into the drain. That is, the guide member regulates the flow direction of the primary static drainage from the primary drainage opening to the drainage ditch,
By making the primary water stoppage drainage flow smoothly, the secondary water stoppage drainage can also flow smoothly along with the flow of the primary water stoppage drainage. For this reason, it is possible to suppress the primary water stoppage from flowing into the secondary drainage opening side against the secondary water stoppage.

[0015] In this case, it is preferable that the guide member and the secondary drainage flow path on the upstream side of the junction are displaced from each other in the finding direction.

According to this configuration, the guide member does not obstruct the flow of the secondary water stoppage, the secondary water stoppage can flow more smoothly, and the primary water stoppage drainage can be carried out. Flowing into the secondary drain opening side via the drain passage can be suppressed as much as possible.

In these cases, the primary drainage opening has an upper drainage opening and a lower drainage opening arranged vertically, and the upper drainage opening and the lower drainage opening are arranged so as to be displaced from each other in the finding direction. Is preferred.

According to this configuration, even if a large amount of the primary static drainage flows into the primary drainage opening, the flow of the primary static drainage is controlled by the upper drainage opening and the lower drainage opening, and the flow of the primary static drainage is controlled. The direction can be regulated to go downward. For this reason, it is possible to suppress the flow direction of the primary still water drainage passing through the primary drainage opening toward the secondary drainage flow channel side. Further, drainage time can be increased by causing the primary still water drainage having a relatively large flow rate to flow down through the two drainage openings. For this reason, a large amount of drainage does not instantaneously flow into the drainage ditch, and the drainage ditch can be prevented from being full.

In these cases, it is preferable that a fin piece for controlling drainage of the bathroom floor is vertically provided on the fitting body located on the bathroom side of the first seal member.

According to this configuration, the drainage that overflows the bathtub and flows as running water reaches the first seal member after being controlled by the fin pieces. For this reason, it is possible to prevent the running water from vigorously hitting the first seal member, and to restrict the flow direction of the primary water stoppage drainage flowing into the primary drainage opening toward the bathroom.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A drainage structure for a bathroom according to an embodiment of the present invention will be described below with reference to the accompanying drawings. This bathroom is composed of a unit bath with a barrier-free design in which there is no step between the bathroom and the dressing room. FIG. 1 is a view of a folding door constituting a doorway of a bathroom. As shown in FIG. 1, a folding door 1 as a fitting is configured by incorporating a left and right door bodies 3 and 3 as a fitting body into a frame 2. ing. In this case, the floor 4 of the bathroom A, the lower frame 12 of the frame 2 described below,
It is arranged substantially flush with the floor surface 5 of the dressing room B, that is, so as not to have a step (see FIG. 2).

The frame 2 is constituted by an upper frame 11, a lower frame 12, and both vertical frames 13, 13. Each door 3
The upper frame 15, the lower frame 16, and both the vertical frames 17, 7 are framed, and the horizontal rail 18 is incorporated in the middle part of the upper and lower parts, and the resin panel bodies 19, 19 are fitted into the upper and lower parts vertically. ing. A dressing room B is located between the upper and lower positions of the right door 3.
A handle portion 21 is formed on the side, and a towel rail (not shown) also serving as a handle is attached to the bathroom A side. In addition, the lower frame 16 of each door body 3 has a ventilation gallery 2 that communicates indoors and outdoors.
2 are formed.

Next, referring to FIG. 2, the lower frame 12 of the frame 2 will be described.
The surrounding structure will be described. At the end of the waterproof pan 6 constituting the floor of the bathroom A, a pan groove 6a is formed so as to cover the lower frame 12 from below, and the pan groove 6a is provided with the bathroom A
A drain groove 7 is located on the side, and a lower frame seat 8 is located on the undressing room B side. Lower frame seat 8
Is formed shallower than the drain groove 7, and its end is raised. The lower frame 12 is seated on the lower frame seating portion 8, and although not particularly shown, the space between the lower frame seating portion 8 and the lower frame 12 is appropriately sealed. A lid 9 is provided at an upper open portion of the drain groove 7, and the upper surface of the lid 9 is disposed flush with the floor surface 4 of the waterproof pan 6.

The lid 9 is formed in an inverted U-shaped cross section by an upper plate piece 31 and a pair of hanging pieces 32, 32 hanging from the end of the upper plate piece 31 in the expected direction. It has almost the same length as the frame 12. Waterproof fins 33 are fixed to both sides of the upper end of the lid 9 in the expected direction. The waterproof fins 33 on the bathroom A side are in close contact with the waterproof pan 6 and the waterproof fins on the undressing room B side. Reference numeral 33 is in close contact with the lower frame 12. Floor drainage flowing through the waterproof pan 6 to the folding door 1 side is covered by a lid 9.
To the lower frame 12. Further, a drain pipe 36 is connected to the drain groove 7 via a filter 35. Although not shown, the drain pipe 36 is connected to a main drain pipe (a drain trap) of the bathroom A.

The lower frame 12 has a hollow lower frame main body 41 seated on the lower frame seating portion 8, a seal mounting piece 42 extending from the lower frame main body 41 to the undressing room side, and an upper end of the seal mounting piece 42. Dressing room partition 43 extending horizontally from
And a rail piece 44 erected in the upper middle part of the lower frame body 41
And a horizontal piece 45 extending from the upper and lower middle positions of the rail pieces 44 to the bathroom A side, and are integrally formed. An upward seal piece (second seal member) 47 extending upward is attached to the seal mounting piece 42, and the tip of the upward seal piece 47 is bifurcated, and the door body (lower frame 16) 3 is formed. It is in close contact with the lower end of the undressing room B side.

A plurality of mounting openings 48 are formed in the base of the rail piece 44 in the direction of finding, and a check valve 49 is detachably mounted in each mounting opening 48 (details will be described later). The floor drain water stopped by the upward seal piece 47 passes through a drain opening (secondary drain opening) 50 formed between the rail piece 44 and the upward seal piece 47, passes through a check valve 49, and enters the drain groove 7. Inflow. Similarly, a plurality of drain holes (primary drain openings) 51 are formed in the horizontal piece 45 in the finding direction, and each drain hole 51 is disposed so as to be displaced in the finding direction with respect to each check valve 49. ing. Further, a plurality of notches 32 are formed in the hanging piece 32 of the lid 9 so as to correspond to each drain hole 51.
a is formed, and the flow of the floor drainage that has passed through the drainage hole 51 smoothly flows into the drainage groove 7 through the notch 32a.

On the other hand, on the lower frame 16 of the door body 3, a downward seal piece (first seal member) 53 is attached to the inner surface on the bathroom A side, and the tip of the downward seal piece 53 is a rail piece 44.
From the bathroom A side. At the lower end of the lower frame 16 which is located on the bathroom A side of the downwardly facing seal piece 53, a water control fin piece 54 is vertically suspended in an inclined state. The floor drainage that has flowed into the lower frame 12 over the lid 9 is
At 4, the flow is controlled and the water is stopped by the downward seal pieces 53, and flows down from the drain hole 51 to the drain groove 7. Also,
The floor drainage leaked from the downward seal piece 53 is stopped by the upward seal piece 47 and flows down to the drain groove 7 through the drain opening 50 and the check valve 49.

That is, the primary stationary drainage water stopped by the downward seal pieces 53 flows into the drain groove 7 through the primary drain passage 55 extending from the drain hole 51 to the drain groove 7. The secondary drainage of floor drainage that leaks from the downward seal piece 53 and is stopped by the upward seal piece 47 passes through the secondary drain passage 56 extending from the drain opening 50 through the check valve 47 to the drain groove 7. Flows into the drain ditch 7. And the secondary drainage channel 56
The downstream part after the check valve 49 is also used as the primary drainage flow path 55, and the secondary drainage merges with the primary drainage and then flows into the drainage groove 7. The floor drainage flowing into the drainage groove 7 passes through the filter 35 and flows into the drainage pipe 36.

Here, an example of the check valve 49 mounted on the mounting opening 48 will be described with reference to FIG.
The check valve 49 includes a case 61 having a valve seat 62 formed therein,
The valve body 63 is in close contact with the valve seat 62. The valve body 63 is pivotally supported on the case 61 by left and right shaft portions 64, 64 so as to be swingable. On both outer sides of the case 61, wedge-shaped retaining protrusions 65 are formed, and the check valve 49 is mounted in the mounting opening 48 in a snap-in manner. In this check valve 49, a valve seat 62 is formed to be obliquely inclined, and a valve body 63 is attached to the valve seat 62 obliquely.

When the flow of the primary water stoppage is stronger than that of the secondary water stoppage, the valve body 63 is moved to the valve seat 6 by the primary water stoppage.
2 to prevent the primary still water from flowing into the drain opening 50 side. Conversely, when the flow of the secondary water stoppage is stronger than that of the primary water stoppage, the valve body 63 is lifted by the secondary water stoppage and the secondary water stoppage is allowed to pass. Note that the valve body 63 may be vertically suspended as shown in FIG. In addition, the valve body 63 does not necessarily have to completely stop the primary water stoppage.

As described above, the secondary drainage channel 5 is located on the upstream side of the portion where the primary drainage and secondary drainage merge.
Since the check valve 49 is interposed in 6, even if a large amount of floor drainage occurs, the primary water stoppage does not flow into the drainage opening 50 side (backflow). Similarly, even when the drain groove 7 becomes full due to the primary water stoppage, or when the drainage on the drain pipe 36 flows backward, the backflow drainage is prevented by the check valve 49 and the drainage opening 50 side No inflow (backflow) to
That is, the primary static drainage water and the backflow drainage flow into the secondary drainage flow path 56.
, Overflowing from the secondary drain passage 56, over the upward seal piece 47, and leaking to the undressing room B side can be reliably prevented.

In the first place, the floor drain reaching the lower frame 12 beyond the lid 9 hits the water-supplying fin piece 54 in the inclined posture, and its flow direction is directed to the drain groove 7 side. For this reason, the primary water stoppage drainage smoothly passes through the drainage hole 51 and flows into the drainage groove 7, so that the flow of floor drainage is less likely to flow toward the downward seal piece 53 and the check valve 49. Therefore, the amount of secondary water stoppage draining from the downward seal piece 53 can also be reduced. Further, since the drain hole 51 and the check valve 49 are provided so as to be displaced from each other in the finding direction, it is possible to reduce the amount of the primary stoppage drainage reaching the check valve 49.

Next, a modification of the check valve 49 will be described with reference to FIG. In the check valve 49 of this modification, a valve seat 71 is formed by the edge of the mounting opening 48 and the upper surface of the lower frame main body 41, and the valve body 72 swings into a screw hole 73 formed at an intermediate position of the rail piece 44. It is freely installed. The valve body 72 is bent in an inverted “C” shape toward the bathroom A side, and hangs in a free state with a slight gap between the valve body 72 and the upper surface of the lower frame main body 41. In this configuration, a small amount of secondary water stoppage drainage flows from the gap between the valve body 72 and the upper surface of the lower frame main body 41 to the drainage groove 7 side, so that the resistance of the valve body 72 when passing through the check valve 49 is reduced. I will not receive it. Therefore, the secondary drainage channel 56 does not accumulate in the secondary drainage channel 56, and it is possible to prevent the secondary drainage channel 56 from becoming dirty or accumulating dust thereon.

Next, a second embodiment will be described with reference to FIG. This embodiment shows a case where a bathroom door 81 is provided at the entrance of the bathroom A. The bathroom door 81
The lower frame 84 is composed of a door body 82 and a door frame 83, and the lower frame 84 of the door frame 83 is seated on the lower frame seating portion 8 of the pan groove 6a as in the above embodiment. In this case, a lower frame attachment 86 is provided instead of the rail piece 44 of the lower frame 84, and the lower frame attachment 86 is detachably attached to the horizontal piece 45. Further, instead of the seal attachment piece 42, a seal contact piece 87 extending to the opposite side to the undressing room parting piece 43 is formed, and a drainage opening 88 is formed between the seal contact piece 87 and the lower frame attachment 86. I have.

The lower frame attachment 86 is formed with a plurality of attachment drain holes (upper drain openings) 89 connected to the plurality of drain holes (lower drain openings) 51. The plurality of attachment drain holes 89 are arranged in the finding direction, and each attachment drain hole 89 is arranged so as to be displaced in the finding direction with respect to each drain hole 51.

On the other hand, a lower frame attachment 92 is attached to the lower end of the lower frame 91 of the door body 82. At the lower end of the lower frame attachment 92, a first downward seal piece 93 is attached to the bathroom A side, and a second downward seal piece 94 is attached to the undressing room B side. The distal end of the first downward seal piece 93 is in close contact with the upper surface of the lower frame attachment 86, and the distal end of the second downward seal piece 94 is in close contact with the upper surface of the seal contact piece 87. Further, on the bathroom A side of the first downward seal piece 93, a water control fin piece 95 is integrally formed.

The primary drainage of floor drainage, which is controlled by the water-suppressing fin pieces 95 and stopped by the first downward seal pieces 93, passes through the attachment drainage holes 89 and the drainage holes 51.
The water flows into the drain groove 7 through the primary drain passage 55. on the other hand,
Leakage from first downward seal piece 93 Second downward seal piece 9
The secondary drainage of the floor drainage stopped in step 4 is a drainage opening 88
Flows through the secondary drain passage 56, passes through the check valve 49, and flows into the drain groove 7.

In this embodiment, the floor drain that has flowed vigorously to the lower frame side is not only controlled by the water control fin pieces 95 but also sufficiently controlled while passing through the attachment drain holes 89 and the drain holes 51. The water is drained to reach the drain 7. In addition, since it takes time to reach the drainage groove 7, it is possible to prevent the drainage groove 7 from being filled with a sudden inflow of the primary still water. That is, it is possible to cause the primary water stoppage drainage to flow down to the drainage groove 7 over time, and it is possible to avoid an instantaneous full state of the drainage groove 7. Therefore, it is possible to reliably prevent the primary still water from flowing backward and reaching the position of the second downward seal piece 94.

Next, a third embodiment will be described with reference to FIG. This embodiment has the same basic form as the first embodiment, and a plurality of guide members 67 are attached to the primary drain passage 55 instead of the check valve 49. Each guide member 67 is made of resin or the like and is a piece.
It is formed in a box shape in which the upper wall and the side wall on the bathroom A side are omitted. Two guide members 67 in the embodiment are provided in the finding direction, and a plurality of drain holes 51 formed in the horizontal piece 45 corresponding to each guide member 67 are also formed in two places. That is, the primary still water drained through the drain hole 51 is guided by the guide member 67 and guided to the drain groove 7.

A plurality of drainage holes 68 are formed at the base of the rail piece 44 in place of the mounting opening 48 of the first embodiment.
It is arranged to be displaced in the finding direction. In such a configuration, the primary water stoppage drainage that has passed through the drainage hole 51 is guided by the guide member 67 and directly guided to the drainage groove 7. For this reason, it is difficult for the primary water stoppage drainage to flow into the drainage opening 88 side through the drainage hole 68, and the upward sealing piece 47
And leakage to the undressing room B side beyond the above can be prevented as much as possible.

It should be noted that the bathroom drainage structure of the present invention can be applied to various types of sliding doors in addition to the above-mentioned folding doors and bathroom doors.
Needless to say. Further, the check valve may have a valve body made of a thin resin film or the like.

[0042]

As described above, according to the bathroom drainage structure of the present invention, even if a large amount of the primary stoppage water flows down through the primary drainage opening, the primary stoppage water is blocked by the check valve. Does not flow into the secondary drain opening side. Also, when the drainage flows backward from the drainage pipe side via the drainage groove, the backflow drainage is prevented by the check valve and does not flow into the secondary drainage opening side. Therefore, it is possible to effectively prevent the backflow drainage from reaching the second seal member via the secondary drainage channel, and to prevent the drainage from leaking to the undressing room side as much as possible.

Further, according to another bathroom drainage structure of the present invention, the guide member regulates the flow direction of the primary static drainage from the primary drainage opening to the drainage ditch, and smoothly flows the primary static drainage. This allows the secondary water stoppage to flow smoothly along with the flow of the primary waterstop. For this reason, it is possible to prevent the primary water stoppage from flowing into the secondary drainage opening side against the secondary water stoppage, and to prevent the water leakage to the dressing room side as much as possible. .

[Brief description of the drawings]

FIG. 1 is a view showing a folding door to which a bathroom drainage structure according to a first embodiment of the present invention is applied.

FIG. 2 is a longitudinal sectional view around a lower frame to which a bathroom drainage structure according to the first embodiment is applied.

FIG. 3 is a structural diagram showing an example of a check valve mounted on a lower frame of the first embodiment.

FIG. 4 is a longitudinal sectional view around a lower frame to which a check valve according to a modification of the first embodiment is applied.

FIG. 5 is a longitudinal sectional view around a lower frame to which a bathroom drainage structure according to a second embodiment is applied.

FIG. 6 is a longitudinal sectional view around a lower frame to which a bathroom drainage structure according to a third embodiment is applied.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1 folding door, 2 frame body, 3 door body, 6 waterproof pan, 7 drainage groove, 12 lower frame, 16 lower frame, 36 drainage pipe, 47 upward seal piece, 49 check valve, 50 drainage opening, 51
Drainage hole, 53 Downward seal piece, 54 Water control fin piece, 56
Secondary drainage channel, 62 valve seat, 63 valve body, 67 guide member, 68 drainage hole, 71 valve seat, 72 valve body, 8
8 drainage opening, 89 attachment drainage hole, 93 first downward seal piece, 94 second downward seal piece, 95
Water fins, A bathroom, B dressing room

Claims (8)

[Claims] 1. A first seal member interposed between a bathroom side of a fitting body and a lower frame of a frame, and a second seal interposed between a undressing room side of the fitting body and the lower frame. A member, a drainage groove disposed on the bathroom side of the lower frame to receive drainage of the bathroom floor, and a primary water stoppage drainage of the bathroom floor formed in the lower frame and stopped by the first seal member to the drainage groove. A primary drainage opening to flow down, a secondary drainage opening formed in the lower frame to stop secondary water drainage of the bathroom floor stopped by the second seal member into the drainage ditch, and from the primary drainage opening. In the drainage structure of the bathroom in which the primary still water drained down and the secondary water drainage flowing down from the secondary drain opening are merged and led to the drainage ditch, the secondary drainage upstream of the junction is provided. In the flow path, while preventing the primary still water from flowing into the secondary drain opening side, Drainage structure of the bathroom, characterized in that the check valve is interposed to allow inflow to the drainage groove side Tsugitome water drainage. 2. The check valve according to claim 1, wherein the check valve has a valve body vertically swingably provided with an upper end portion as a fulcrum, and a valve seat to which the valve body is in close contact. 2. The device according to claim 1, wherein a gap is present between the valve and the valve seat, and the valve is slightly inclined downstream.
The drainage structure of the bathroom according to the above. 3. The non-return valve includes a case provided with a valve seat and removably attached to the secondary drain passage, and a valve element vertically swingably mounted on the case. The drainage structure for a bathroom according to claim 1, wherein: 4. The drainage structure for a bathroom according to claim 1, wherein the check valve and the primary drainage opening are displaced from each other in a finding direction. . 5. A first seal member provided between the bathroom side of the fitting body and the lower frame of the frame, and a second seal provided between the undressing room side of the fitting body and the lower frame. A member, a drainage groove disposed on the bathroom side of the lower frame to receive drainage of the bathroom floor, and a primary water stoppage drainage of the bathroom floor formed in the lower frame and stopped by the first seal member to the drainage groove. A primary drainage opening to flow down, a secondary drainage opening formed in the lower frame to stop secondary water drainage of the bathroom floor stopped by the second seal member into the drainage ditch, and from the primary drainage opening. In the drainage structure of a bathroom in which the primary drainage drained down and the secondary drainage drained down from the secondary drainage opening are merged and guided to the drainage ditch, the primary drainage opening is provided at the junction. A guide member for guiding the primary still water drained from the drain to the drain groove side is provided. Drainage structure of the bathroom and said Rukoto. 6. The bathroom according to claim 5, wherein the guide member and the secondary drainage flow path on the upstream side of the junction are displaced from each other in the finding direction. Drainage structure. 7. The primary drainage opening has an upper drainage opening and a lower drainage opening arranged vertically, and the upper drainage opening and the lower drainage opening are displaced from each other in a finding direction. The drainage structure for a bathroom according to any one of claims 1 to 6, wherein the bathroom is drained. 8. The fin piece for controlling drainage of the bathroom floor is provided vertically on the fitting body located on the bathroom side of the first seal member. A drainage structure for a bathroom according to any one of the above.