JP7377902B2 - Drain cover and tank system - Google Patents

Description

The present invention relates to a drain cover and a tank system suitable for use in washrooms and the like.

BACKGROUND ART Conventionally, washroom facilities in sanitary facilities have been put into practical use in various shapes and sizes to accommodate a variety of installation environments. In recent years, the designs and shapes of basins, also known as wash basins and hand wash basins, have diversified. The reason behind this is thought to be the realization of miniaturization, which can be considered as miniaturization of the size of the tank body, especially as the installation space becomes narrower. Regardless of the shape or size of the tank body of a washbasin, hand wash, etc., various techniques have been disclosed so far for promoting drainage through a drain port provided in the tank body. These techniques are applied to the drain plug itself or its vicinity, which is provided for the purpose of improving the appearance of the location where the drain is provided and/or temporarily plugging the drain (for example, Patent Document 1, see Patent Document 2). For example, Patent Document 1 discloses a technique for generating a desired water flow in order to smoothly promote the flow of waste water below a drain plug. Further, for example, Patent Document 2 discloses a technique for preventing air from interfering with the flow of drainage by letting the air present on the drainage pipe side during drainage escape to the outside below the drain plug.

International Publication No. 2018/135017 Japanese Patent Application Publication No. 2010-59701

However, the water flowing into the drain cover may be foamy water containing air. Such foamy water tends to cause air to become trapped, which may impede smooth drainage. In other words, the current situation is that drainage performance is hindered by air entrainment, resulting in a problem of rising water levels. Also, depending on the direction of the water flow, a vortex is generated in the tank body, and when it flows into the drain port, the vortex flows in together with the vortex, drawing in air. Furthermore, the situation in which water flows from opposite directions occur on the tank body, collides with each other, generates air, and entrains the air is also a factor that prevents smooth drainage. Conceivable.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an initial object of the present invention is to provide a drain outlet cover that can prevent air from stagnation and suppress water level rise during drainage, and a tank system having the drain outlet cover. It is about providing.

The drain cover according to the present invention includes a cover that can shield the drain in a plan view, and a cover that hangs down from a lower surface facing the drain when the cover covers the drain. The lower surface of the cover is inclined downwardly away from the upper surface of the cover as it goes from the outside toward the center.

The drain cover according to a second aspect of the present invention is characterized in that the lower surface of the cover has a tapered portion formed in an inverted conical shape.

The drain cover according to claim 3 of the present invention is characterized in that a boundary portion of the base portion connected to the lower surface of the cover body forms an arc-shaped or circular-arc-shaped rounded portion.

In the drain cover according to claim 4 of the present invention, the lower surface of the covering body has a tapered portion formed in an inverted conical shape, and the base portion has a tapered portion on the lower surface of the covering body. A boundary portion connected to the base portion forms an arc-shaped or circular-arc-shaped rounded portion, and the tapered portion of the cover body and the rounded portion of the base portion are formed continuously.

In the drain cover according to claim 5 of the present invention, the lower surface of the cover body is directed toward the center side of the cover body from the outer peripheral edge of the cover body, and toward the lower side that is the drain port side. It is characterized by having a smooth tapered surface that gradually slopes.

In the drain cover according to claim 6 of the present invention, the base is formed almost entirely in a columnar shape, and a boundary area near the lower surface of the cover body extends outward along the lower surface. It is characterized by being formed in an arc shape or a circular arc shape that expands in the direction of.

In the drain cover according to claim 7 of the present invention, the base extends in a region close to the lower surface or in a region away from the lower surface toward a peripheral edge of the cover and in a direction away from the cover. It is characterized by having a protruding guide wall.

The drain cover according to an eighth aspect of the present invention is characterized in that it further includes a foreign matter removal section provided below the lower surface of the cover.

A tank system according to claim 9 of the present invention is a tank body provided with a drain port, and a drain cover attached to the drain port, and the tank system according to any one of claims 1 to 8 of the present invention. It is characterized by having a drain port cover.

The tank system according to claim 10 of the present invention is characterized in that it further includes a non-siphon trap provided on the downstream side of the tank.

According to the present invention, a drain plug and a drain cover are provided that can prevent air from accumulating and suppress water level rise during draining even in narrow washbasins and tank bodies having various shapes and sizes. A tank system can be provided.

The above objects, other objects, features, and advantages of the present invention will become more apparent from the following description of the mode for carrying out the invention, which is given with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an illustrative perspective view of a sink/hand washing facility according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view illustration of the tank system which is one embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an illustrative front view, partially in cross section, of a tank system according to an embodiment of the present invention. FIG. 1 is an illustrative front view showing a part of a drain pipe unit according to an embodiment of the present invention in cross section. FIG. 1 is a perspective illustrative view of a drain cover according to an embodiment of the present invention. FIG. 1 is a perspective illustrative view of a drain cover according to an embodiment of the present invention. FIG. 1 is an illustrative view of a drain cover according to an embodiment of the present invention, in which (A) is a front view and (B) is a side view. FIG. 3 is an illustrative bottom view of the drain cover. It is a perspective view illustration of a drain outlet cover. It is an illustrative front view, partially in cross section, showing the flow of water in the sink/hand washing equipment. FIG. 5 is an illustrative cross-sectional view showing a state in which the drain port cover shown in FIG. 5 is attached to the drain port. FIG. 5 is an illustrative cross-sectional view showing a state in which the drain port cover shown in FIG. 5 is attached to the drain port. FIG. 6 is a perspective illustrative view showing a second embodiment of the drain port cover. FIG. 13 is an illustrative bottom view of the drain port cover shown in FIG. FIG. 3 is an illustrative bottom view of the drain cover showing the flow of water. FIG. 11 is an illustrative front view of the drain port cover shown in FIG. FIG. 11 is a front cross-sectional illustrative view of the drain port cover shown in FIG. FIG. 11 is a front cross-sectional illustrative view of the drain port cover shown in FIG. It is an illustrative front view, partially in cross section, showing a state in which the drain port cover is fitted into the drain port. It is an illustrative front view, partially in cross section, showing a state in which the drain port cover is fitted into the drain port. FIG. 13 is an illustrative cross-sectional view showing a state in which the drain port cover shown in FIG. 13 is attached to the drain port. FIG. 13 is an illustrative cross-sectional view showing a state in which the drain port cover shown in FIG. 13 is attached to the drain port. FIG. 6 is a perspective illustrative view showing a second embodiment of the drain port cover. FIG. 2 is an illustrative perspective view of the drain cover showing the flow of water. FIG. 2 is an illustrative perspective view of the drain cover showing the flow of water. FIG. 2 is an illustrative perspective view of the drain cover showing the flow of water. FIG. 13 is an illustrative cross-sectional view of a modification of the drain port cover shown in FIG. FIG. 13 is an illustrative cross-sectional view of a modification of the drain port cover shown in FIG. FIG. 7 is an illustrative perspective view of a drain cover according to a third embodiment. FIG. 29 is an illustrative view of the drain port cover shown in FIG. 29, in which (A) is a front view and (B) is a side view. FIG. 29 is an illustrative front view of the drain port cover shown in FIG. FIG. 29 is an illustrative bottom view of the drain port cover shown in FIG. It is an illustrative front view, partially in cross section, showing a state in which the drain port cover is fitted into the drain port. FIG. 19 is an illustrative bottom view of the drain port cover shown in FIG. It is a front view illustrative view which made a part of the tank body system of 3rd Embodiment into a cross section. FIG. 19 is an illustrative perspective view of a modification of the drain port cover shown in FIG. It is a perspective view illustrative view of the drain outlet cover of 4th Embodiment. FIG. 37 is an illustrative bottom view of the illustrated drain port cover. It is a front view illustration of the drain outlet cover of 4th Embodiment. Figure 37 is an illustrative view of the illustrated drain outlet cover, (A) is a bottom illustrative view, and (B) is a partially cross-sectional front illustrative view showing the state in which the drain outlet cover is attached to the drain outlet. be. FIG. 37 is a perspective illustrative view of a modified example of the illustrated drain port cover. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an illustrative front view, partially in cross section, of a tank system according to an embodiment of the present invention. FIG. 1 is an illustrative front view showing a part of a bottle trap of a tank system according to an embodiment of the present invention in cross section.

(definition)
In the description of the present invention, the directions in the description with reference to the drawings are defined as follows. That is, when the drain outlet cover described later is attached to the drain outlet described later, the cover side is referred to as the upper side, and the drain outlet side is referred to as the lower side. In addition, the top in the vertical direction is called the top or upper side, and the bottom is called the bottom or lower side.

When the drain cover is attached to the drain, the vertical line extending from the cover or the direction perpendicular to or intersecting the vertical direction is referred to as the outside, right or left side, or radial direction. Furthermore, when the drain cover is attached to the drain, the edge of the drain is referred to as the outside, the right or left side, and the radial direction.

The drain cover and tank system according to the present invention will be explained below with reference to FIGS. 1 to 4.

The drain cover and tank body system according to the present invention are suitably used, for example, in washrooms installed in homes and stores, and handwashing equipment, which is sanitary equipment for washing hands.

The sink/hand washing equipment 10 shown in FIG. 1 is an example of equipment that is particularly suitable for so-called space saving, which is installed in a limited and narrow space within a store.

A washbasin/hand washing facility 10 equipped with a tank system according to the present invention includes a tank 14 with a drain cover 12, a discharge device 18 for discharging clean water into the tank 14, and a drain port from the discharge device 18. It has a drainage device (drain pipe unit) 16 for discharging cold water and hot water discharged into the tank body 14 of the cover 12 from the tank body 14.

Further, the washbasin/hand washing equipment 10 further includes a water supply device (not shown) for supplying clean water to the discharge device 18.

In the sink/hand washing equipment 10, a drain cover 12 is disposed at a drain port 14c forming a drain opening formed below the tank body 14.

The drain cover 12 is configured to be detachable from or inserted into the drain port 14c. The drain port 14c is connected to a drain device (drain pipe unit) 16 for connecting to a sewer pipe.

The drain cover 12 constituting the drainage device (drain pipe unit) 16 according to the present invention constitutes a drain opening formed in the lower part of the vessel body 50 of the tank body 14 constituting a washbasin, hand washing basin, etc. It is attached directly or indirectly to the drain port 14c and the vessel drain port portion 52.

The drain cover 12 according to the present invention includes a cover 20 that constitutes the main body of the drain cover, and three or more guide walls that are formed radially outward from the center of the cover 20 and project downward from the cover 20. 22.

The drain cover 12 according to the present invention is configured to be directly supported by the guide wall 22 on the drain port 14c. A cover body 20 is disposed above the guide wall 22.

The cover body 20 of the drain outlet cover 12 includes a plate portion 20a which is circular in plan view and is also called a drain plug or a drain plate, and is also called a blind plate. It is configured to cover the drain port 14c and the inner surface 54 of the tank body 14 around the drain port 14c so that it cannot be seen visually, that is, from above.

In the cover body 20, the lower surface of the cover body 20, which is the surface on the side of the drain port 14c, extends from the outside/edge side of the drain port 14c toward the center, that is, the inside, toward the drain port 14c side, which is the lower side. It is inclined downward toward the drain port 14c in a direction away from the upper/top side.

The cover 20 includes a tapered portion 20c on the lower side of which is formed into an inverted conical shape to prevent air from remaining.

The lower surface of the cover 20 on the drain port 14c side is the lower side that is on the drain port 14c side toward the center axis of the cover 20 from the outer periphery of the cover 20, that is, the edge side periphery of the drain port 14c. It is formed into a planar shape that slopes toward the

The guide wall 22 includes a dispersion surface 24 that disperses the flow of water by colliding with water from outside the drain port 14c, and a dispersion surface 24 that disperses the flow of water by colliding with water from outside the drain port 14c, and a dispersion surface 24 that guides the water to the center of the cover body 20 so that water flowing from different directions collides with each other. It has a guide surface 26 that encourages water to fall downward.

The drain cover 12 according to the present invention includes a columnar base 28 that extends downward from the center of the cover 20 and a columnar base 28A that supports the drain cover 12 and the guide wall 22.

Note that the base 28 and the columnar base 28A are integrated, and the columnar base 28A can be considered as an upper structure of the base 28.

The base 28 is disposed at the center of the cover 20 , inside the guide wall 22 , that is, on the center side of the cover 20 , and is integrated with the guide wall 22 .

The column-shaped base 28A is also integrated with the guide wall 22 and constitutes a part of a guide member 34 configured as a separate member from the cover 20. The column-shaped base 28A is disposed inside the guide wall 22, that is, on the center side of the cover 20 when the guide member 34 is attached to the cover 20.

The integrated base 28 and columnar base 28A are connected to a shaft portion extending from the drain port 14c side of the cover body 20 toward the drain port 14c side and downward, and to a surface of the cover body 20 on the drain port 14c side. The boundary portion includes a rounded portion 28a formed in an arc shape or a circular arc shape that curves in the circumferential direction of the cover body 20.

The rounded portion 28a has a rounded surface below the cover 20 for guiding water that has flowed in along the lower surface of the tapered drain port main body of the cover 20 to the drain port 14c below.

The tapered portion 20c of the cover 20 and the rounded portion 28a of the columnar base 28A form a continuous rounded surface.

The base 28 may be integrated with the cover 20, or may be integrated with both the cover 20 and the guide wall 22.

A space 48 (first space 48a) connected to the inner surface 54 of the container body 50 is formed below the cover body 20 between the adjacent guide walls 22. Furthermore, a space 48 (second space 48b) connected to the drain port 14c is formed below the guide wall 22.

In the drainage device (drain pipe unit) 16 constituting the tank system, the configuration downstream from the drain port 14c is roughly as follows. The drain port 14c is formed as an opening at the upper end of a drain pipe main body 60 that is provided so as to close the vessel body drain port 52 of the tank body 14 and extend downward, excluding the tapered portion. .

A drain pipe main body 60 is provided directly below the tank body 14. The drain pipe main body 60 is fixed to the tank body 14 by tightening a lock nut 62 through a sliding gasket 64, a triangular gasket 66, and a sponge gasket 68 while maintaining waterproofness. A drain pipe 70 is provided downstream of the drain pipe main body 60. The drain pipe 70 is fixed to the drain pipe main body 60 by tightening a fixing nut 72 while maintaining waterproofness via a packing 74. Note that a male thread 60b is formed on the circumferential surface of the drain pipe main body 60, so that the lock nut 62 and the fixing nut 72 are screwed onto the drain pipe main body 60.

Furthermore, the drain device (drain pipe unit) 16 that constitutes the tank system has an S trap 78 provided downstream of the drain pipe 70. The S trap 78 is connected to the drain pipe 70 by fastening a fixing nut 76. The S trap 78 has a structure in which two pipes having a U-shaped outer shape are joined with a fixing nut 73 via a packing 75. The S trap 78 allows the waste water from the drain pipe 70 to stay as a seal in the downwardly curved part, thereby preventing odors and gases from the piping further downstream of the S trap 78 from rising up to the drain pipe 70. is prevented.

Note that the tank body 14 is provided with an overflow hole 58 for draining water at the upper side.

Each embodiment will be described in more detail below.

(First embodiment)
Next, a drain cover 12, which is a first embodiment of the present invention, will be described mainly based on FIGS. 3 to 10.

(Whole stopper)
The cover body 20 has a circular dish-like outer shape in plan view, which is also called a blind plate. The plate portion 20a is configured to cover the drain port 14c so that it cannot be seen from above the drain port 14c, and also to cover the inner surface 54 around the drain port 14c of the tank body 14, and is configured to cover the drain port 14c so that the drain port 14c is not visible from above. When attached to the port 14c, it is fixed in a state floating above the drain port 14c.

The cover body 20 has a surface on the side of the drain port 14c, that is, a lower surface of the main body as it goes from the outer edge of the drain port 14c toward the center, that is, inside. It is slanted away from the top, that is, the sky. That is, the lower surface of the cover 20 is formed with a tapered portion 20c having an inverted cone-shaped tapered surface that becomes thinner toward the bottom.

As shown in FIG. 10, the inclination angle (gradient) of the surface of the cover body 20 on the drain port 14c side, that is, the lower surface, is 1 degree with respect to the horizontal plane that is in contact with the lowest part of the lower surface. It is 5 degrees or less.

That is, the angle α between the horizontal line X on the horizontal plane serving as a reference and the straight line Y on the lower surface of the cover 20 is an acute angle, and is 1 degree or more and 5 degrees or less.

When the inclination angle is 1 degree or more and 5 degrees or less, the drainage capacity becomes optimal.

If the inclination angle is too large than 5 degrees, the opening area will decrease and the drainage capacity will decrease.

The relationship between the height h between the lower surface of the cover 20 and the drain port 14c of the tank body 14 and the radius r of the drain port 14c is as follows.
r/2≦h
It is preferable to satisfy the above conditions because the drainage capacity will be sufficient.

In the case of h<r/2, the space (A) between the lower surface of the cover 20 and the drain port of the tank body 14 is smaller than the opening area (B) of the drain port, and the drainage in the space (A) is is constricted, so the drainage capacity is not fully demonstrated.

As shown in FIG. 10, the height h between the lower surface of the cover body 20 and the drain port 14c of the tank body 14 is set to a height of 25% or more and 65% or less of the diameter D of the drain port 14c. The drainage capacity has been optimized.

If the height h is low, the drainage capacity will be reduced, and if it is high, the appearance will be poor.

In this embodiment, as shown in FIG. The radius of the arc-shaped rounded portion (R) 28a of the boundary portion where the two are connected is 10 mm or more and 15 mm or less, and is a relatively gentle circular arc surface. Within this range, drainage capacity becomes optimal. If this radius is too large, the opening area will be reduced and the drainage capacity will be reduced.

In the lower surface of the cover body 20 that is the surface on the drain port 14c side, the lower side that is the drain port 14c side extends from the drain port edge side peripheral edge that is the outer edge of the cover body 20 toward the central axis side of the cover body 20. The tapered portion 20c, which is inclined toward , is formed into an overall smooth surface shape.

The drain outlet cover 12 according to the first embodiment is attached to the drain outlet 14c in a floating state with a space between the cover body 20 and the mouth edge of the drain outlet 14c. It is fixed to the drain port 14c in a draining position in which water can be drained through the drain port 14c.

(base)
As particularly shown in FIG. 9, the drain cover 12 according to the first embodiment is configured such that the cover 20, the base 28, and the guide wall 22 are not integrated, but are attached to the cover 20. A column-shaped base 28A that constitutes the guide wall 22 and the base 28 is formed on the guide member 34.

In the guide member 34, a plurality of guide walls 22 are integrally formed with a column-shaped base 28A.

The upper end of the guide member 34 has a conical surface so as to be attached to the lower surface of the cover 20.

The column-like base 28A includes a fixing structure 44A for attaching the guide member 34 to the cover 20. An attachment hole 44b is provided inside the fixing structure 44A, into which a columnar member 44a for connecting the columnar base 28A to the cover 20 is attached and fixed.

The lower surface of the cover 20 is provided with a protrusion 20b serving as a fixing part for fixing the guide member 34 by fitting into a through hole constituting a mounting hole 44b provided in the columnar base 28A. ing.

The column-shaped base 28A is integrated with the guide wall 22 and constitutes a part of a guide member 34 that is configured as a separate member from the cover 20. The columnar base 28A constituting the base 28 is disposed at the center of the cover 20 when the guide member 34 is attached to the cover 20, and is disposed inside the guide wall 22, that is, on the center side of the cover 20. Ru.

The column-shaped base 28A extends toward the drain port 14c side, that is, in a downward direction, from the lower surface of the cover body 20, which is the surface of the cover body 20 on the drain port 14c side. The boundary portion connecting with the surface is formed in an arc shape or a circular arc shape. That is, the pillar-shaped base 28A has a rounded portion 28a, which is an arcuate surface that gradually expands outward, at the upper portion that contacts the cover 20.

As particularly shown in FIGS. 7 and 8, the pillar-shaped base 28A protruding from the lower surface of the cover body 20, which is the drain port 14c side, is formed almost entirely in a columnar shape, and extends from the drain port 14c of the cover body 20. The boundary area with the surface of the cover body 20 on the drain port 14c side in the vicinity of the lower side, which is the side, forms an arc-shaped or circular arc-shaped rounded surface that expands toward the outside of the lower surface of the cover body 20. It has a rounded portion 28a.

The pillar-shaped base 28A protruding toward the lower surface of the cover 20 on the drain port 14c side has a guide wall 22 that extends in the peripheral direction of the cover 20 and the cover 20 in a region close to the cover 20. It is provided in a protruding manner so as to extend in the direction further away.

The tapered surface of the tapered part 20c formed on the lower surface of the cover 20 and the rounded surface of the rounded part 28a of the boundary portion of the columnar base 28A attached to the cover 20 form a continuous surface. It is configured as follows.

(Guidance wall)
The column-shaped base 28A protruding downward from the surface of the cover 20 on the drain port 14c side, that is, the lower surface, is in contact with or from the vicinity of the lower surface of the cover 20 on the drain port 14c side. , a plurality of guide walls 22 are provided to protrude so as to extend toward the peripheral edge of the cover 20 and in a direction away from the cover 20.

In particular, as shown in FIG. 9, a space 48 (first space 48a) connected to the inner surface 54 of the vessel body 50 below the cover body 20 is formed between the adjacent guide walls 22, and a first space 48a is formed between the adjacent guide walls 22. A space 48 (second space 48b) connected to the drain port 14c is formed below the space 48a.

The guide wall 22 is a plate-shaped body that extends downward from the lower surface of the cover 20 and expands toward the circumference of the cover 20 and the lower side. Note that the plurality of guide walls 22 have substantially the same shape.

In this embodiment, the outline of the outer surface of the guide wall 22 formed on the outside opposite to the base 28 side is a first ridgeline region 40, a second ridgeline region 42, and a third ridgeline region 46, which will be described later. It is a plate-shaped body having a planar shape whose width decreases in stages.

The guide wall 22 includes an upper end portion that gradually rises outward from the columnar base 28A side along the tapered portion 20c of the cover body 20.

As particularly shown in FIG. 7, the guide wall 22 includes a first plane area 30 that allows water flowing from the tank body 14 to the drain port 14c to flow in a substantially horizontal direction, and a drain port cover 12 fixed to the tank body 14. A second flat area 32 is provided which is fitted into the drain port 14c in order to do so.

In plan view, the first plane region 30 has a constant width extending in the radial direction of the cover 20 from the side of a perpendicular passing through the center of the cover 20 toward the drain port 14c side, and a constant width extending in the vertical direction from the lower surface of the cover 20. It has an external shape that extends to a certain height. The second planar region 32 has an outer shape in which the width decreases obliquely from the lower surface of the covering body 20 toward the base 28 in a region near the lower end directly below the first planar region 30 in plan view.

In the guide wall 22, the outer surface, that is, the end surface, of the guide wall 22 formed on the outside opposite to the base 28 side of the guide wall 22 has a first ridgeline region 40, a second ridgeline region 42, and a third ridgeline region 46. It can be divided into

The first ridgeline region 40 is a region extending downward with a constant width from the cover 20, and is located inside the outer circumferential edge of the cover 20 that covers the drain port 14c and slightly outward from the outer circumferential edge of the drain port 14c. This is a protruding area. The second ridge line area 42 is an area where the width from the base 28 on the side of the perpendicular line passing through the center of the cover body 20 decreases on the side near the lower end of the guide wall 22, and is the area where the width decreases from the base 28 on the side of the perpendicular line passing through the center of the cover body 20, This is a region that fits into the tapered inner peripheral surface. The third ridgeline region 46 is a region extending downward with a constant width from the lower end of the second ridgeline region 42, and is a region that fits into the main body portion of the drain pipe outlet portion 60c having the same inner diameter.

As shown in particular in FIGS. 6 and 7, the guide wall 22 forms planar guide surfaces 26 on both sides. The guide surface 26 includes a first guide surface 26a that is one main surface that extends in a direction substantially parallel to and substantially perpendicular to a perpendicular line passing through the center of the cover 20, and a first guide surface 26a that is the other main surface that extends in a direction that is substantially perpendicular to a perpendicular line that passes through the center of the cover body 20. It has a second guide surface 26b corresponding to the back surface of the guide surface 26a, and is configured to expand in the circumferential direction of the cover 20 as it goes toward the base 28 side. The guide wall 22 has a rectangular cross section and is configured to guide water from the outside toward the inside along its surface to generate a swirling flow. Note that the cross-sectional shape of the guide wall 22 may be tapered.

The outer surface of the guide wall 22 corresponding to the first ridgeline region 40 and the second ridgeline region 42 described above includes the outer edge of the first guide surface 26a and the outer edge of the second guide surface 26b formed on the left and right surfaces thereof. A flat dispersion surface 24 is formed which connects the two.

The dispersion surface 24 is a flat surface extending downward from the cover body 20 side, and is configured so that water flowing from the inner surface 54 side of the tank body 14 toward the drain port 14c collides with the dispersion surface 24.

In this embodiment, the guide wall 22 is formed to extend outward from a column-shaped base 28A extending in a vertical direction parallel to a perpendicular line extending downward from the center of the cover 20. That is, the guide wall 22 extends outward from the center of the cover 20 and is integrated with the columnar base 28A.

The guide wall 22 disperses the water flowing in from the outside by the dispersion surface 24, and causes it to flow horizontally or slightly downward in the first space 48a along the guide surface 26. After the water that has flowed in collides with the base 28, it flows down along the surface of the base 28 from the second space 48b to the drain port 14c. That is, the drain cover 12 is configured to guide water through the guide wall 22 and the base 28.

In other words, the guide wall 22 and the base 28 guide water flowing from the outside into the first space 48a between the plurality of adjacent guide walls 22, and after the water collides with the base 28, the water flows into the base 28 and the guide. It is configured to flow down along the surface of the wall 22.

In this embodiment, the width of the guide wall 22, ie, the length from the base 28 in the radial direction of the cover 20, is set to 10% or more and 45% or less of the diameter of the cover 20.

Further, the height of the guide wall 22, that is, the length extending downward in the vertical direction from the lower part of the cover body 20 is set to 70% or more and 100% or less of the diameter of the cover body 20.

The guide wall 22 is configured to form a space between the cover 20 and a fixing region 44 (described later), into which water flows inward, and is configured such that the dispersion surface 24 faces outward in the space. ing.

That is, a space 48 (first space 48a) connected to the inner surface 54 of the vessel body 50 below the cover body 20 is formed between the adjacent guide walls 22, and water swirls in this space 48. It becomes a flow. Further, a space 48 (second space 48b) connected to the drain port 14c is formed below the first space 48a, and water flows down without staying there.

In this embodiment, the guide wall 22 has a second ridgeline region 42 and a third ridgeline region 46 that constitute a fixed region 44 that is formed to fit into the drain port 14c. The fixed region 44 is a region having an outer shape that fits into the drain pipe outlet portion 60c of the drain pipe main body 60, and specifically, the fixed region 44 corresponds to the second ridgeline region 42 and the third ridgeline region 46. When the part that fits into the drain outlet part 60c of the drain pipe body 60, the third ridge line area 46 fits into the main body part of the drain outlet part 60c, and the upper end of the second ridge line area 42 It is located at the upper end portion of the flange 60a. Furthermore, the upper end of the second ridgeline region 42 has an outer shape that does not lower toward the drain pipe 70 than its position.

The fixed areas 44 are arranged in a ring-like manner in correspondence with the arrangement of the plurality of guide walls 22 at appropriate intervals. In other words, the fixed regions 44 are provided at equal intervals on a circumference whose radius is the distance from the central axis of the cover 20 to the second ridgeline region 42.

Note that the space formed between the plurality of adjacent fixed regions 44 corresponds to the second space 48b that constitutes the opening that becomes the drainage opening communicating with the drainage port 14c.

The configuration of the drainage device (drain pipe unit) 16 including the tank system of the present invention will be described below.

The drainage device (drainage pipe unit) 16 includes a drainage pipe 70 that communicates with the sewer system, and a drainage pipe that is connected to the drainage pipe 70 at its base end and supported and fixed to the container body 50 of the tank body 14 at its distal end. It has a main body 60.

The drain pipe 70 has a shape capable of forming, for example, an S trap 78, and is connected to a floor surface or a wall surface to drain water outdoors. The drain pipe 70 is connected to the drain pipe main body 60 via a fixing nut 73 with a female threaded portion exposed on the inner surface and a ring-shaped packing 75 arranged at the female threaded portion, specifically at the lower end of the drain pipe main body 60. Connected to the proximal end.

The drain pipe main body 60 has an enlarged flange 60a formed on the upper end side, and a male thread 60b formed on the outer peripheral surface side extending below the flange 60a. A step for supporting the drain cover 12 is provided on the inner peripheral surface side of the flange 60a. A lock nut 62, a sliding packing 64, a triangular packing 66, and a sponge packing 68 engage with the surface of the drain pipe main body 60.

Specifically, as shown in FIGS. 3 and 4, the drain pipe main body 60 is fixed to the vessel drain port 52 of the vessel body 50 of the tank body 14 via the flange 60a at the upper end. The male screw 60b of the drain pipe main body 60 allows the sliding packing 64, the triangular packing 66, and the sponge packing 68 to be inserted from below, and the lock nut 62 is screwed into the male thread 60b.

On the other hand, the lower end of the drain pipe main body 60 is screwed into and fixed to a fixing nut 72. That is, the drain pipe main body 60 and the drain pipe 70 are connected by the fixing nut 72 via the packing 74 without water leakage.

On the other hand, when the lock nut 62 is screwed upward with the vessel drain port 52 (drain opening) of the vessel 50 located between the flange 60a of the drain pipe main body 60 and the sponge packing 68, the sliding packing 64, the triangular packing 66 and the sponge packing 68 move upward. As a result, the vessel drain port portion 52 (drain opening) of the vessel body 50 is strongly clamped and fixed. Note that, although the rotation of the lock nut 62 rotates the sliding packing 64, it is not transmitted to the triangular packing 66 and the sponge packing 68.

(About water flow)
In the drain cover 12 of the first embodiment having the above configuration, water flowing from the outside in the direction indicated by the arrow in FIG. It is dispersed and guided along the guide surface 26 and to the lower surface of the cover 20, and flows horizontally or slightly downward in the first space 48a.

After colliding with the base 28, the flowing water is rectified along the surface of the base 28 and by the guide wall 22, and further flows down to the drain port 14c via the second space 48b.

At this time, the water flowing from the inner surface 54 of the container body 50 into the space 48 (first space 48a) formed between the adjacent guide walls 22 below the cover 20 flows into the space 48 (first space 48a). In the space 48a), the flow becomes a swirling flow and flows down to the space 48 (second space 48b) formed below the base 28 and the guide wall 22 and connected to the drain 14c. As a result, the water that has flowed into the drain cover 12 is smoothly drained from the space 48 (second space 48b) to the drain port 14c with almost no air being involved.

(Modified example)
Next, the structure in which the drain cover 12 is attached to the drain device 16, which is a modification of the tank system having the drain cover 12 according to the first embodiment of the present invention, will be mainly described in FIG. This will be explained based on FIG.

As shown in FIG. 11, a modification of the tank system having the drain cover 12 according to the first embodiment of the present invention is such that the drain cover 12 shown in FIG. There is a space 48 between them, and the space 48 is fixed in a drainage position where water can be drained through the space 48, whereas the space 48 is fixed in a drainage position where water can be drained through the space 48 that forms a drainage opening and the space that forms the drainage opening. The difference is that it is configured to be movable between the plug position that prohibits water drainage through the portion 48, and that it is formed so that it can be inserted into and removed from the drain port 14c.

The cover body 20 of the drain cover 12 in the tank system of this modification is attached to a drive mechanism 80 that is disposed within the drain pipe outlet portion 60c and has a function of moving the drain cover 12 up and down. The drive mechanism 80 includes a cylindrical part 82 that is cylindrical and extends from the cover 20 side toward the drain pipe 70 and is integrated with the columnar member 44a, and a support part 84 that further extends from the cylindrical part 82 toward the drain pipe 70. A transmission member 88 is rotatably connected to one end surface of the support portion 84 and protrudes radially from the outer circumferential side of the support portion 84; The operating member 86 extends toward the user.

The transmission member 88 swings as the operating member 86 is vertically displaced as indicated by the white arrow in the figure.

The support portion 84 and the columnar portion 82 integrally move up and down in conjunction with the swinging of the transmission member 88 as the operating member 86 is displaced in the up and down direction.

The drain cover 12 is a unit for opening and closing the drain 14c by the drive mechanism 80, and can be installed in the drain pipe outlet 60c from above the drain outlet 60c. It is configured to be removable from the drain pipe outlet portion 60c.

In this embodiment, the drain cover 12 can be disposed at the drain outlet 60c by fitting the drain cover 12 from above the drain outlet 60c. Moreover, the drain cover 12 can be removed from the drain pipe main body 60 by pulling up the drain cover 12 toward the upper side of the drain pipe outlet portion 60c.

The drain cover 12 constituting the drain device (drain pipe unit) 16 includes the above-mentioned plate portion 20a constituting a disc-shaped blind plate made of metal or resin, and the cover body 20 constituting the drain cover 12. It is equipped with a packing (not shown) attached to the bottom of the.

The packing is formed in an annular shape from an elastically deformable material such as rubber or resin, and is attached to the outer circumferential side of the lower protrusion 20b of the cover 20.

As the operating member 86 is displaced downward, the transmission member 88 swings and the support section 84 moves upward, and the drain cover 12 also moves upward in conjunction with the support section 84, thereby removing the packing. It is separated from the drain pipe outlet part 60c. Thereby, the drain cover 12 is released from the drain pipe outlet portion 60c.

On the other hand, as the operating member 86 is displaced upward, the transmission member 88 swings and the support part 84 moves downward, and the drain cover 12 also moves downward in conjunction with the support part 84. The entire outer peripheral portion of the packing contacts the drain pipe outlet portion 60c. Thereby, the drain cover 12 closes the drain pipe outlet portion 60c.

Further, in the drain cover 12, which is a modified example of the drain cover in the first embodiment, the foreign matter removing section 200, which functions as a filter for removing foreign matter that is about to flow into the drain 14c, is a drainage device. It is provided around the axis of the support part 84 of the 16 drive mechanisms 80.

The foreign matter removal unit 200 has an open box shape that is approximately circular in plan view and has an opening facing upward, that is, toward the drain cover 12 so as to remove foreign matter flowing in from above.

The foreign matter removing section 200 in this first embodiment is particularly referred to as a hair catcher, as shown in FIG. A plurality of through holes 200b are formed in the removal section main body 200a.

The foreign matter removing section 200 allows the waste water flowing from the inner surface 54 of the container body 50 to pass through the through hole 200b, while collecting foreign matter such as hair mixed with the waste water in the removing section main body 200a. This prevents foreign matter from flowing further downward from the drain port 14c.

(Second embodiment)
Next, a drain cover 12 according to a second embodiment of the present invention will be described mainly based on FIGS. 13 to 20.

(cover body)
The cover body 20 is also called a blind plate, and has a circular dish-like outer shape when viewed from above. A plate portion 20a is provided. The cover body 20 is configured to cover the drain port 14c so as not to be visible from above the drain port 14c, and also to cover the inner surface 54 of the tank body 14 around the drain port 14c. The plate portion 20a is fixed in a state floating above the drain port 14c when the drain port cover 12 is attached to the drain port 14c.

The cover body 20 has a surface on the side of the drain port 14c, that is, a lower surface thereof. It is sloped away from the top of 20, that is, the top side. That is, the lower surface of the cover 20 on the drain port 14c side forms a tapered portion 20c having an inverted cone-shaped tapered surface that becomes narrower toward the bottom. The tapered portion 20c is inclined from the peripheral edge of the drain port side of the cover body 20 toward the center axis of the cover body 20 toward the drain port 14c side/downward, and is formed into an overall smooth surface shape. .

The angle of inclination of the lower surface of the cover 20 is 1 degree or more and 5 degrees or less with respect to the horizontal plane in contact with the lower surface.

The diameter of the cover 20 is larger than the diameter of the drain port 14c. Furthermore, since the cover body 20 is larger in diameter than the flange 60a, the flange 60a can also be made invisible, which is more preferable in terms of appearance.

(base)
The drain cover 12 in this embodiment includes a columnar base 28 extending downward from the center of the cover 20.
The drain cover 12 according to the second embodiment is attached to the drain 14c in a floating state with a space between the cover 20 and the edge of the drain 14c. It is fixed to the drain port 14c in a draining position in which water can be drained through the drain port 14c.

In the drain cover 12 according to the second embodiment, as shown in FIG. 17 in particular, the cover 20, the base 28, and the guide wall 22 are not integrated, but are attached to the cover 20 as separate members. A guide wall 22 and a base 28 are formed in the guide member 34 configured as above.

In the guide member 34, a plurality of guide walls 22 are integrally formed with the base 28.

The upper end of the guide member 34 has a flat surface so as to be attached to the lower surface of the cover 20.

The base 28 extends from the lower surface of the cover 20 on the drain port 14c side toward the drain port 14c side, that is, in the downward direction, and the boundary portion that connects with the surface of the cover body 20 on the drain port 14c side is It is formed in an arc shape or a circular arc shape. That is, the base 28 has a rounded portion 28a that forms an arcuate rounded surface that gradually expands outward at the upper portion that contacts the cover 20.

In the base portion 28, a region below the rounded portion 28a has a columnar shape with a circular cross section, and faces an inner surface 54, which is a curved surface of the vessel body 50.

The base portion 28 is provided vertically in the center of the drain port 14c. Thereby, water flowing from the inner surface 54 side of the container body 50 collides with the base 28 and is rectified. Therefore, interference with water flowing from the opposite direction of the inner surface 54 can be avoided, and drainage can be prevented from being hindered.

The base portion 28 has a rounded portion 28a, so that the area close to the cover body 20 is curved, and extends downward in the vertical direction while gradually becoming thinner, so that foreign matter such as hair is directed downward in the vicinity of the drain port 14c. It becomes slippery.

The base 28 is curved and extends upward from a position lower than the lower surface of the cover 20 by a length of 1.5 times or more and 3 times or less the diameter of the base 28 . The surface extending to the lower surface of the cover body 20 and in contact with the lower surface is bulged so as to be a smooth surface. That is, the base 28 has a truncated cone shape that is curved as it extends upward due to the rounded portion 28a, and the rising angle increases with the start of curving, and the angle between the base 28 and the cover 20 increases. It is maximum at the connection part.

(Guidance wall)
In the base 28 protruding downward from the drain port 14c side of the cover 20, a plurality of guide walls 22 are provided in a region downwardly away from the cover 20 in the direction of the circumferential edge of the cover 20 and in the direction of the cover 20. It is provided in a protruding manner so as to extend in a direction away from the body 20.

As shown in particular in FIGS. 13 and 14, the base 28 on which the plurality of guide walls 22 are provided includes a fixing structure 44A for attaching the guide member 34 to the cover 20. Particularly, as shown in FIG. 18, inside the fixing structure 44A, a columnar member 44a for connecting the base 28 to the cover 20 is attached, and an attachment hole 44b for fixing the base 28 is provided.

A protrusion 20b serving as a fixing part for fixing the guide member 34 by fitting into a mounting hole 44b provided in the base 28 is provided on the lower surface of the cover 20. A hole 44c for attaching and fixing the columnar member 44a is provided inside the protrusion 20b in communication with the attachment hole 44b.

The base 28 is disposed at the center of the cover 20 when the guide member 34 is attached to the cover 20, and is disposed inside the guide wall 22, that is, on the center side of the cover 20.

As shown in FIG. 13, a space 48 (first space 48a) connected to the inner surface 54 of the vessel body 50 below the cover body 20 is formed between the adjacent guide walls 22, and a first space 48a is formed between the adjacent guide walls 22. A space 48 (second space 48b) connected to the drain port 14c is formed below the portion 48a.

The guide wall 22 allows water to flow into the space 48 (first space 48a) partitioned by the guide wall 22 from the inner surface 54 of the container body 50, thereby allowing water to flow into the space 48 (first space 48a) separated by the guide wall 22, thereby allowing water to flow into the space 48 (first space 48a) separated by the guide wall 22. A place for air bubbles to escape can be created in another space 48 (first space 48a) partitioned by the wall 22.

The guide wall 22 is a plate-shaped body that extends downward from a position away from the lower surface of the cover 20 and expands in the circumferential direction of the cover 20 and toward the lower side. Note that the plurality of guide walls 22 have substantially the same shape.

In this embodiment, it is a substantially inverted L-shaped plate-like body when viewed from the front, and the outline of the lid side surface formed on the outside opposite to the base 28 side is a first ridgeline region 40 and a first ridgeline region 40, which will be described later. By being composed of the second ridgeline region 42 and the third ridgeline region 46, it has a planar shape in which the width decreases in stages.

The guide wall 22 includes a first plane area 30 that allows water flowing from the tank body 14 to the drain port 14c to flow in a substantially vertical direction, and a first plane area 30 that is fitted into the drain port 14c to attach the drain cover 12 to the tank body 14. A second planar area 32 is provided.

The first plane region 30 has a certain width extending in the radial direction of the covering body 20 from a perpendicular line passing through the center of the covering body 20 toward the drain port 14c side, and a certain height extending in the vertical direction from the lower surface of the covering body 20. It has the outer shape of a rod-like body with a rectangular cross section extending outward from the base 28. The second planar region 32 has the outer shape of a rod-shaped body with a rectangular cross section extending downward from the outer end of the first planar region 30 .

The guide wall 22 has a first ridgeline region 40 that extends downward so as to be gradually lower than the base 28, and a second ridgeline that decreases in width from the base 28 on the side of a perpendicular line passing through the center of the cover 20 in a region near the lower end. The third ridgeline region 46 extends downward with a constant width from the lower end of the second ridgeline region 42 .

The first ridgeline region 40 is an outer surface of the guide wall 22 formed on the outer side of the guide wall 22 opposite to the base 28 side, and the second ridgeline region 42 is formed on the outer edge of the first ridgeline region 40. This is the outer surface of the guide wall 22. The third ridgeline region 46 is the outer surface of the guide wall 22 formed directly below the second ridgeline region 42 .

The guide wall 22 is a plate-shaped body that extends downward from the cover body 20 side and gradually becomes lower toward one side in the circumferential direction of the cover body 20, and both surfaces thereof form a planar guide surface 26. are doing. The guide surface 26 includes a first guide surface 26a that is one main surface that extends in a direction substantially parallel to and substantially perpendicular to a perpendicular line passing through the center of the cover 20, and a first guide surface 26a that is the other main surface that extends in a direction that is substantially perpendicular to a perpendicular line that passes through the center of the cover body 20. It has a second guide surface 26b corresponding to the back surface of the guide surface 26a, and is configured to expand in the circumferential direction of the cover 20 as it goes toward the base 28 side.

The outer surface of the guide wall 22 forms a flat dispersion surface 24 that connects the outer edge of the first guide surface 26a and the outer edge of the second guide surface 26b formed on the left and right surfaces thereof. There is.

The dispersion surface 24 is a flat surface extending downward from the base 28 side, corresponding to the first ridgeline region 40, and the water flowing from the inner surface 54 side of the tank body 14 toward the drain port 14c collides with the water dispersion surface 24 so that the dispersion surface 24 is a flat surface extending downward from the base 28 side. It is structured so that it is dispersed and flows down.

As described above, in this embodiment, the guide wall 22 is formed to extend outward from the base 28 extending in the vertical direction parallel to the vertical line extending downward from the center of the cover 20. It is a plate-shaped body having a substantially inverted L-shape, extends outward from the center of the cover 20, and is integrated with the base 28. As a result, the dispersion surface 24 is separated from the tapered portion 20c of the cover 20, and a gap is formed between the cover 20 and the guide wall 22.

The guide wall 22 disperses the water flowing in from the outside by the dispersion surface 24, and causes it to flow horizontally or slightly downward in the first space 48a along the guide surface 26. After the water that has flowed in collides with the base 28, it flows down along the surface of the base 28 from the second space 48b to the drain port 14c. That is, the drain cover 12 is configured to guide water using the guide wall 22 and the base 28 to generate a swirling flow.

In other words, the guide wall 22 and the base 28 guide water flowing from the outside into the first space 48a between the plurality of adjacent guide walls 22, and after the water collides with the base 28, the water flows into the base 28 and the guide. It is configured to flow down along the surface of the wall 22.

In this embodiment, the width of the guide wall 22, that is, the length from the base 28 in the radial direction of the cover 20 is set to be 10% or more and 45% or less of the diameter of the cover 20.

Further, the height of the guide wall 22, that is, the length from the bottom of the cover 20 to the lower part in the vertical direction, is set to 25% or more and 60% or less of the diameter of the cover 20.

The guide wall 22 is configured to form a space between the cover body 20 and a fixed area 44 (described later), into which water flows inward, and is configured such that the dispersion surface 24 faces upward in the space portion. ing.

A space 48 (first space 48a) connected to the inner surface 54 of the vessel 50 is formed below the cover 20 between the cover 20 and the adjacent guide wall 22. The water becomes a swirling flow. Further, a space 48 (second space 48b) connected to the drain port 14c is formed below the first space 48a, and water flows down without staying there.

The first ridgeline region 40 of the guide wall 22 is configured to be inside the outer circumferential edge of the cover 20 covering the drain port 14c and to protrude slightly outward from the outer circumferential edge of the drain port 14c.

In this embodiment, the guide wall 22 has a second ridgeline region 42 and a third ridgeline region 46 that constitute a fixed region 44 that is formed to fit into the drain port 14c. The fixed region 44 is a region having an outer shape that fits into the drain pipe outlet portion 60c of the drain pipe main body 60, and specifically, the fixed region 44 corresponds to the second ridgeline region 42 and the third ridgeline region 46. When the part that fits into the drain outlet part 60c of the drain pipe body 60, the third ridge line area 46 fits into the main body part of the drain outlet part 60c, and the upper end of the second ridge line area 42 It is located at the upper end portion of the flange 60a. Furthermore, the upper end of the second ridgeline region 42 has an outer shape that does not lower toward the drain pipe 70 than its position. The fixed areas 44 are arranged in a ring-like manner in correspondence with the arrangement of the plurality of guide walls 22 at appropriate intervals. In other words, the fixed regions 44 are provided at equal intervals on a circumference whose radius is the distance from the central axis of the cover 20 to the second ridgeline region 42. Further, a second space 48b is formed between and below the plurality of guide walls 22, which constitutes an opening serving as a drainage opening communicating with the drainage port 14c.

(About drainage)
According to this second embodiment, as shown in FIGS. 15 and 24 to 26, the waste water flowing from the inner surface 54 of the vessel body 50 of the tank body 14 flows along the tapered portion 20c of the cover body 20. , flows into the first space 48a between the guide walls 22, a part of which collides with the base 28, and a part of which flows into the second space 48b between the plurality of guide walls 22.

The water that collided with the base 28 also flows down along the base 28 into the second space 48b.

According to this embodiment, the guide wall 22 obstructs the vortex flow entering the drain port 14c and prevents air from being entrained. The base 28 prevents water flowing in from opposite directions from colliding with each other, and prevents air from being entrained.

The compartment near the base 28 serves as an air outlet when wastewater flows in, and prevents air from stagnation.

(Modified example)
Next, the structure in which the drain cover 12 is attached to the drain device 16, which is a modification of the tank system having the drain cover 12 according to the first embodiment of the present invention, will be mainly explained in FIGS. 21 and 21. The explanation will be based on 22.

In a modification of the tank system having the drain cover 12 of the second embodiment, the drain cover 12 shown in FIGS. 13 to 20 has a space 48 between the cover body 20 and the drain port 14c. However, the water is fixed in a drainage position that allows water to drain through the space 48, while the water is fixed in a water drainage position that allows water to drain through the space 48 that constitutes a drainage opening, and that water is prohibited from flowing through the space 48 that forms a drainage opening. The difference is that it is configured to be movable between the plug position and the drain port 14c, and is formed so as to be freely inserted into and removed from the drain port 14c.

Unlike the second embodiment shown in FIGS. 13 to 20, the drain cover 12 constituting the drainage device (drain pipe unit) 16 of the modified example has a guide wall 22 with an outer shape as shown in FIGS. , the outer shape is slightly smaller than that of the second embodiment shown in FIGS. 13 to 20 so that it can be inserted into the drain port 14c. The base portion 28 is provided with a mounting hole 44b in order to attach the columnar member 44a to the fixed structure 44A.

The cover body 20 of the drain cover 12 is attached to a drive mechanism 80 that has the function of vertically moving the drain cover 12 disposed within the drain pipe outlet portion 60c. The drive mechanism 80 is provided with a cylindrical part 82 that is formed of a cylindrical columnar member 44a that extends from the cover 20 side toward the drain pipe 70, and protrudes from the outer circumferential side of one end surface of the cylindrical part 82. A support portion 84 is provided.

The transmission member 88 swings as the operating member 86 is vertically displaced as indicated by the white arrow in FIG.

The support portion 84 and the columnar portion 82 integrally move up and down in conjunction with the swinging of the transmission member 88 as the operating member 86 is displaced in the up and down direction.

The drain cover 12 is a unit for opening and closing the drain 14c, and can be installed in the drain pipe outlet 60c from above the drain pipe outlet 60c. It is configured to be removable from 60c.

In this embodiment, the drain cover 12 can be disposed at the drain outlet 60c by fitting the drain cover 12 from above the drain outlet 60c. Moreover, the drain cover 12 can be removed from the drain pipe main body 60 by pulling up the drain cover 12 toward the upper side of the drain pipe outlet portion 60c.

The drain cover 12 constituting the drain device (drain pipe unit) 16 includes the above-mentioned plate portion 20a constituting a disc-shaped blind plate made of metal or resin, and the cover body 20 constituting the drain cover 12. It is equipped with a packing (not shown) attached to the bottom of the.

The packing is formed in an annular shape from an elastically deformable material such as rubber or resin, and is attached to the outer circumferential side of the lower protrusion 20b of the cover 20.

As the operating member 86 is displaced downward, the transmission member 88 swings and the support section 84 moves upward, and the drain cover 12 also moves upward in conjunction with the support section 84, thereby removing the packing. It is separated from the drain pipe outlet part 60c. Thereby, the drain cover 12 is released from the drain pipe outlet portion 60c.

On the other hand, as the operating member 86 is displaced upward, the transmission member 88 swings and the support part 84 moves downward, and the drain cover 12 also moves downward in conjunction with the support part 84. The entire outer peripheral portion of the packing contacts the drain pipe outlet portion 60c. Thereby, the drain cover 12 closes the drain pipe outlet portion 60c.

Further, the drain cover 12 in this second embodiment is provided with a foreign matter removal section 200 that functions as a filter for removing foreign matter that is about to flow into the drain port 14c.

The foreign matter removing section 200 in this second embodiment is called a hair catcher, and as shown in FIGS. Multiple holes are drilled.

The removal section main body 200a is disposed between the plate section 20a of the cover 20 and the first ridgeline region 40, which is the upper end surface of the guide wall 22.

The foreign matter removing section 200 allows the waste water flowing from the inner surface 54 of the container body 50 to pass through the through hole 200b, while collecting foreign matter such as hair mixed with the waste water in the removing section main body 200a. This prevents foreign matter from flowing further downward from the drain port 14c.

(tank body)
The container body 50 constituting the tank body 14 is mortar-shaped and includes an inner surface 54 having an arcuate or elliptical cross section.

The inner surface 54 of the container body 50 has a curvature that decreases as it approaches the container drain port 52, and has a side bottom surface 56 that is substantially flat as a bottom surface.

The water discharged from the discharge port 92 of the discharge device 18 flows down in bundles and collides with the cover body 20 of the drain cover 12 and the side bottom surface 56 of the container body 50 that constitutes the tank body 14.

The drain port 14c is configured as an upper opening of the drain pipe main body 60 of the drain device (drain pipe unit) 16 fitted in the container body drain port portion 52 of the container body 50 of the tank body 14, and is a part beyond the tapered part. There is.

The drain port 14c is circular in plan view as shown in FIG. 2, and its diameter (diameter L1) is preferably 33 mm or more and 36 mm or less.

The area of the drain port 14c in plan view is preferably 10% or less in area ratio to the plan view shape of the container body 50 (in the case of plan view circular shape). The discharge device 18 is installed near the sink/hand washing equipment 10, as shown in FIG. In the figure, the discharge device 18 includes a discharge device body 90 that extends from the base end to the vicinity of the drain cover 12 and guides clean water, and a discharge port 92 provided at the tip of the discharge device body 90 to discharge clean water. and an operating section 94 for controlling the presence or absence and intensity of water supply from the discharge port 92.

In this embodiment, the ejection device 18 is illustrated as having a sensor (not shown) that detects the proximity of a user's finger or the like to the ejection device main body 90, for example. That is, an embodiment is illustrated in which clean water is discharged without the user touching the discharge device 18 by detection by the sensor.

(About drainage)
According to this second embodiment, the guide wall 22 obstructs the flow of the vortex entering the drain port 14c and prevents air from being entrained. Since the guide wall 22 and the base 28 exist, water entering the drain port 14c is prevented from colliding with water entering from the opposite direction, thereby preventing air from being entrained.

The first space 48a, which is a section between adjacent guide walls 22 in the vicinity of the base 28, serves as an air outlet when drainage water flows in, and prevents air from stagnation.

(Third embodiment)
Next, a drain cover 12 according to a third embodiment of the present invention will be described mainly based on FIGS. 29 to 35.

(Whole stopper)
The cover body 20 has a circular dish-like outer shape in plan view, which is also called a blind plate. The plate portion 20a is configured to cover the drain port 14c so that the drain port 14c cannot be seen from above, and also to cover the inner surface 54 of the tank body 14 around the drain port 14c, and is configured to cover the drain port cover 12 so that the drain port 14c is not visible from above. When attached to the port 14c, it is fixed in a state floating above the drain port 14c.

The cover body 20 has a surface on the side of the drain port 14c, that is, a lower surface of the main body as it goes from the outer edge of the drain port 14c toward the center, that is, inward, toward the bottom/drain port 14c side. It is slanted away from the top, that is, the sky. That is, the lower side surface of the cover 20 is formed with a tapered portion 20c having an inverted cone-shaped tapered surface that becomes thinner toward the bottom.

The angle of inclination of the lower surface of the cover 20 is 1 degree or more and 5 degrees or less with respect to the horizontal plane in contact with the lower surface.

The lower surface of the cover 20 on the drain port 14c side extends from the drain port edge side peripheral edge, which is the outer edge of the cover 20, toward the center axis side of the cover 20 toward the lower side on the drain port 14c side. The tapered portion 20c that is inclined towards the front is formed into a smooth surface shape as a whole.

The drain cover 12 according to the third embodiment is fixed to the drain port 14c in a drainage position in which the water in the tank body 14 can be drained through the drain cover 12, as particularly shown in FIG. .

(Guidance wall)
The drain cover 12 has a plurality of guide walls 22.

Each guide wall 22 is a plate-shaped body that extends downward from the lower surface of the covering body 20 and expands toward the circumference of the covering body 20 and toward the lower side. Note that the plurality of guide walls 22 have substantially the same shape.

In this embodiment, the guide wall 22 has a lid side surface formed on the outside opposite to the base 28 side. It has a planar shape in which the width gradually decreases.

The guide wall 22 includes an upper end portion that gradually rises outward from the base 28 side along the tapered portion 20c of the cover body 20.

The guide wall 22 includes a first plane area 30 that allows water flowing from the tank body 14 to the drain port 14c to flow in a substantially vertical direction, and a first plane area 30 that is fitted into the drain port 14c to attach the drain cover 12 to the tank body 14. A second planar area 32 is provided.

The first plane region 30 has a certain width extending in the radial direction of the covering body 20 from a perpendicular line passing through the center of the covering body 20 toward the drain port 14c side, and a certain height extending in the vertical direction from the lower surface of the covering body 20. It has the outer shape of a rod-like body with a rectangular cross section extending outward from the base 28. The second planar region 32 has the outer shape of a rod-shaped body with a rectangular cross section extending downward from the outer end of the first planar region 30 .

In particular, as shown in FIG. 30(B), in the guide wall 22, the outer surface, that is, the end surface, of the guide wall 22 formed on the outer side of the guide wall 22 opposite to the base 28 side has the first ridgeline region 40, It is divided into a second ridgeline region 42 and a third ridgeline region 46 .

The first ridgeline region 40 is a region extending downward with a constant width from the cover 20, and is located inside the outer circumferential edge of the cover 20 that covers the drain port 14c and slightly outward from the outer circumferential edge of the drain port 14c. This is a protruding area. The second ridge line area 42 is an area where the width from the base 28 on the side of the perpendicular line passing through the center of the cover body 20 decreases on the side near the lower end of the guide wall 22, and is the area where the width decreases from the base 28 on the side of the perpendicular line passing through the center of the cover body 20. This is a region that fits into the tapered inner peripheral surface. The third ridgeline region 46 is a region extending downward with a constant width from the lower end of the second ridgeline region 42, and is a region that fits into the main body portion of the drain pipe outlet portion 60c having the same inner diameter.

The first ridgeline region 40, the second ridgeline region 42, and the third ridgeline region 46 are outer surfaces, that is, end surfaces, of the guide wall 22 formed on the outside of the guide wall 22 on the side opposite to the base 28 side.

As particularly shown in FIGS. 29 and 30, the guide wall 22 has planar guide surfaces 26 on both sides thereof. The guide surfaces 26 include a first guide surface 26a, which is one main surface that extends in a direction parallel to a perpendicular line passing through the center of the cover 20, and a first guide surface 26a, which is the other main surface, and which extends in a direction perpendicular to the perpendicular line passing through the center of the cover 20. It has a second guide surface 26b corresponding to the back surface of the surface 26a, and is configured to expand in the circumferential direction of the cover 20 as it goes toward the base 28 side. The guide wall 22 has a rectangular cross section and is configured to guide water from the outside toward the inside along its surface to generate a swirling flow. Note that the cross-sectional shape of the guide wall 22 may be tapered.

A space 48 (first space 48a) connected to the inner surface 54 of the vessel body 50 is formed below the cover body 20 between the adjacent guide walls 22. Further, a space 48 (second space 48b) connected to the drain port 14c is formed below the first space 48a.

The outer surface of the first plane region 30 of the guide wall 22 forms a flat dispersion surface 24 that connects the first guide surface 26a and the second guide surface 26b formed on the left and right surfaces thereof. There is.

The dispersion surface 24 is a flat surface extending downward from the cover body 20 side corresponding to the first ridgeline region 40, and is configured so that water flowing from the inner surface 54 side of the tank body 14 toward the drain port 14c collides with the dispersion surface 24. has been done.

In this embodiment, the guide wall 22 extends outward from a base 28 formed along a perpendicular line extending downward from the center of the cover 20, and is integrated with the base 28. Further, in this embodiment, the guide wall 22 extends downward from the lower surface of the plate portion 20a of the cover 20 and is integrated with the cover 20.

In this embodiment, the guide wall 22 has a second ridgeline region 42 and a third ridgeline region 46 that constitute a fixed region 44 that is formed to fit into the drain port 14c. The fixed region 44 is a region having an outer shape that fits into the drain pipe outlet portion 60c of the drain pipe main body 60, and specifically, the fixed region 44 corresponds to the second ridgeline region 42 and the third ridgeline region 46. When the part that fits into the drain outlet part 60c of the drain pipe body 60, the third ridge line area 46 fits into the main body part of the drain outlet part 60c, and the upper end of the second ridge line area 42 It is located at the upper end portion of the flange 60a. Furthermore, the upper end of the second ridgeline region 42 has an outer shape that does not lower toward the drain pipe 70 than its position.

The fixed areas 44 are arranged in a ring-like manner in correspondence with the arrangement of the plurality of guide walls 22 at appropriate intervals. In other words, the fixed regions 44 are provided at equal intervals on a circumference whose radius is the distance from the central axis of the cover 20 to the second ridgeline region 42.

The guide wall 22 is configured to form a space between the covering body 20 and the fixed area 44, into which water flows inward, and is configured such that the dispersion surface 24 faces outward in the space portion. .

In particular, as shown in FIG. 29, a space 48 (first space 48a) that is connected to the inner surface 54 of the vessel body 50 below the cover body 20 is formed between the adjacent guide walls 22. Further, below the adjacent guide wall 22, a space 48 (second space 48b) is formed which serves as a drainage opening communicating with the drainage port 14c.

The first ridgeline region 40 of the guide wall 22 is configured to be inside the outer circumferential edge of the cover 20 covering the drain port 14c and to protrude slightly outward from the outer circumferential edge of the drain port 14c.

The drain cover 12 in this embodiment has a base 28 of a columnar body that extends from the lower surface, which is the center of the cover 20 and which is the surface on the drain port 14c side, toward the bottom, which is the drain port 14c side. It is provided with a pillar-like base 28A that constitutes. Note that the strut-like base 28A may extend in contact with the lower surface on the side of the drain port 14c, or may extend from near the lower surface.

The column-shaped base 28A is provided in a protruding manner in a region away from the cover 20 so that the guide wall 22 extends toward the peripheral edge of the cover 20 and in the direction away from the cover 20.

The base 28 is disposed inside the guide wall 22, that is, on the center side of the cover 20, and is integrated with the cover 20 and the guide wall 22.

A boundary portion of the column-shaped base 28A that connects to the surface of the cover 20 on the drain port 14c side is formed in an arc shape or a circular arc shape. That is, the pillar-shaped base 28A has a rounded portion 28a, which is an arc-shaped or circular-arc-shaped surface that gradually expands outward, at the upper portion that contacts the cover 20.

The tapered surface of the tapered part 20c formed on the lower surface of the covering body 20 and the rounded surface of the rounded part 28a of the boundary portion of the columnar base 28A attached to the covering body 20 are formed continuously. .

The guide wall 22 disperses the water flowing in from the outside by the dispersion surface 24, and causes it to flow horizontally or slightly downward in the first space 48a along the guide surface 26. After the water that has flowed in collides with the base 28, it flows down along the surface of the base 28 from the second space 48b to the drain port 14c. That is, the drain cover 12 is configured to guide water using the guide wall 22 and the base 28 to generate a swirling flow.

In other words, the guide wall 22 and the base 28 guide water flowing from the outside into the first space 48a between the plurality of adjacent guide walls 22, and after the water collides with the base 28, the water flows into the base 28 and the guide. It is configured to flow down along the surface of the wall 22.

In this embodiment, the width of the guide wall 22, that is, the length from the base 28 in the radial direction of the cover 20 is set to be 10% or more and 45% or less of the diameter of the cover 20.

Further, the height of the guide wall 22, that is, the length extending downward in the vertical direction from the lower part of the cover body 20 is set to 70% or more and 100% or less of the diameter of the cover body 20.

(About water flow)
In the drain cover 12 of the third embodiment, water flowing from around the drain cover 12 is dispersed by the dispersion surface 24 of the guide wall 22, as shown by the arrows in FIGS. 34 and 35. The water flows horizontally or slightly downwardly in the first space 48a along the guide surface 26 and guided to the lower surface of the cover 20.

After colliding with the base 28, the flowing water is rectified along the surface of the base 28 and by the guide wall 22, and further flows down to the drain port 14c via the second space 48b.

At this time, the water flowing from the inner surface 54 of the container body 50 into the space 48 (first space 48a) formed between the adjacent guide walls 22 below the cover 20 flows into the space 48 (first space 48a). In the space 48a), the flow becomes a swirling flow and flows down to the space 48 (second space 48b) formed below the base 28 and the guide wall 22 and connected to the drain 14c. As a result, the water that has flowed into the drain cover 12 is smoothly drained from the space 48 (second space 48b) to the drain port 14c with almost no air being involved.

(About drainage)
According to this third embodiment, the guide wall 22 obstructs the flow of the vortex entering the drain port 14c and prevents air from being entrained. The presence of the guide wall 22 and the base 28 prevents collision with water in the opposite direction and prevents air from being entrained.

The first space 48a, which is a section between adjacent guide walls 22 in the vicinity of the base 28, serves as an air outlet when drainage water flows in, and prevents air from stagnation.

In this embodiment, as shown in FIGS. 1 and 3, the drainage device (drain pipe unit) 16 is positioned below the discharge device 18, and at the lower end of the drain port 14c. unit) 16.

(Modified example)
Next, the structure in which the drain outlet cover 12 is attached to the drainage device 16, which is a modification of the tank system having the drain outlet cover 12 according to the third embodiment of the present invention, is mainly shown in FIG. I will explain based on this.

A modified example of the drain cover 12 according to the third embodiment of the present invention is attached to the drainage device 16 and has a drainage posture in which water can be drained through the space 48 that forms a drainage opening, and the space 48 that forms the drainage opening. The plug is configured to be operable between a stopper position and a stopper position that prohibits drainage through the stopper.

As shown in FIG. 36, a modification of the drain cover 12 according to the third embodiment is such that a hole 44c is formed in the base 28 and a support part 84 of the drive mechanism 80 is fixed to the hole 44c. It is composed of Note that the configuration of the drive mechanism 80 is similar to the first embodiment or the modification of the second embodiment.

(Fourth embodiment)
Next, a drain cover 12 according to a fourth embodiment of the present invention will be described mainly based on FIGS. 37 to 40.

(Whole stopper)
The cover body 20 has a circular dish-like outer shape in plan view, which is also called a blind plate. The plate portion 20a is configured to cover the drain port 14c so that it cannot be seen from above the drain port 14c, and also to cover the inner surface 54 around the drain port 14c of the tank body 14, so that the drain port cover 12 is not visible from above the drain port 14c. 14c, it is fixed in a state floating above the drain port 14c.

The cover body 20 has a surface on the side of the drain port 14c, that is, a lower surface of the main body as it goes from the outer edge of the drain port 14c toward the center, that is, inside. It is slanted away from the top, that is, the sky. That is, the lower surface of the cover 20 is formed with a tapered portion 20c having an inverted cone-shaped tapered surface that becomes thinner toward the bottom.

The inclination angle (gradient) of the lower surface of the cover 20 is 1 degree or more and 5 degrees or less with respect to the horizontal plane in contact with the lower surface, similar to the configuration shown in FIG. 10 of the first embodiment. .

The lower surface of the cover 20 on the drain port 14c side extends from the drain port edge side peripheral edge, which is the outer edge of the cover 20, toward the center axis side of the cover 20 toward the lower side on the drain port 14c side. The tapered portion 20c is formed into a smooth surface as a whole.

The drain cover 12 according to the fourth embodiment is fixed to the drain port 14c through the drain cover 12 in a position where water can be drained.

(Guidance wall)
The drain cover 12 has a plurality of guide walls 22.

Each guide wall 22 is a plate-shaped body that extends downward from the lower surface of the covering body 20 and expands toward the circumference of the covering body 20 and toward the lower side. Note that the plurality of guide walls 22 have substantially the same shape.

In this embodiment, the outline of the outer surface of the guide wall 22 formed on the outside opposite to the base 28 side is a first ridgeline region 40, a second ridgeline region 42, and a third ridgeline region 46, which will be described later. It is a plate-shaped body having a planar shape whose width is small except for a portion corresponding to the third ridgeline region 46.

The guide wall 22 includes an upper end portion that gradually rises outward from the base 28 side along the tapered portion 20c of the cover body 20.

In particular, as shown in FIG. 39, a space 48 (first space 48a) connected to the inner surface 54 of the vessel body 50 below the cover body 20 is formed between the adjacent guide walls 22, and a first space 48a is formed between the adjacent guide walls 22. A space 48 (second space 48b) connected to the drain port 14c is formed below the space 48a.

The guide wall 22 includes a first curved surface area 31 that allows water flowing from the tank body 14 to the drain port 14c to flow in a substantially vertical direction, and a first curved surface area 31 that is fitted into the drain port 14c in order to attach the drain cover 12 to the tank body 14. and a second curved surface area 33. The first curved surface area 31 has a width extending along the radial direction of the cover 20 and a lower surface of the cover 20 while curving from the perpendicular side passing through the center of the cover 20 toward the drain port 14c side in plan view. It has an outer shape with a height that extends more vertically. The second curved surface region 33 has an outer shape that is curved immediately below the first curved surface region 31 in a plan view, and whose width decreases obliquely from the lower surface of the cover body 20 toward the base 28 in a region near the lower end. .

In particular, as shown in FIG. 39, in the guide wall 22, the outer surface, that is, the end surface, of the guide wall 22 formed on the outer side opposite to the base 28 side is located at the first ridge line region 40, the second ridge line It is divided into a region 42 and a third ridgeline region 46.

The first ridgeline region 40 is a region extending downward while curving so that the width from the base 28 is smaller than that of the cover body 20, and is inside the outer peripheral edge of the cover body 20 that covers the drain port 14c, and is located inside the outer peripheral edge of the cover body 20 that covers the drain port 14c. This is an area that extends slightly outward from the outer periphery. The second ridgeline region 42 is a region extending downward while curving so that the width from the base 28 on the side of the perpendicular line passing through the center of the cover body 20 on the side near the lower end of the guide wall 22 is reduced more than the first ridgeline region 40. It is. The third ridgeline region 46 is a region extending downward with a constant width from the lower end of the second ridgeline region 42, and is a region located within the main body portion of the drain pipe outlet portion 60c having the same inner diameter.

The first ridgeline region 40, the second ridgeline region 42, and the third ridgeline region 46 are outer surfaces, that is, end surfaces, of the guide wall 22 formed on the outside of the guide wall 22 on the side opposite to the base 28 side.

The guide wall 22 is a plate-shaped body that extends downward from the cover body 20 side and is curved so that its position gradually shifts toward one side in the circumferential direction of the cover body 20 in plan view. , is provided with spherical or curved guide surfaces 26 on both sides thereof. Specifically, the guide surface 26 is a spherical surface, a spiral surface formed around the central axis of the base 28, or a curved surface similar to a spiral surface. The guide surface 26 is a first guide surface 26a, which is a surface that extends in a direction substantially parallel to a perpendicular line passing through the center of the cover 20, and a surface that extends in a direction substantially perpendicular to it, and the other main surface, and the first guide surface 26a It has a second guide surface 26b corresponding to the back surface of the cover body 20, and is configured to expand in the circumferential direction of the cover body 20 as it goes toward the base portion 28 side. The guide wall 22 has a cross section including a parallel plane, and is configured to guide water from the outside toward the inside along the surface to generate a swirling flow. Note that the cross-sectional shape of the guide wall 22 may be tapered.

The outer surface of the first ridgeline region 40 of the guide wall 22 is provided with a spherical or curved dispersion surface 24 that connects a first guide surface 26a and a second guide surface 26b formed on the left and right surfaces thereof. .

The dispersion surface 24 is a surface extending downward from the cover body 20 side corresponding to the first ridgeline region 40, and is configured so that water flowing from the inner surface 54 side of the tank body 14 toward the drain port 14c collides with the dispersion surface 24. ing.

In this embodiment, the guide wall 22 is a plate-shaped body formed to extend outward from a base 28 extending in a vertical direction parallel to a perpendicular line extending downward from the center of the cover 20. It extends outward from the center of the cover 20 and is integrated with the cover 20 and the base 28 .

The pillar-shaped base 28A that protrudes and extends from the surface of the cover 20 on the drain port 14c side, that is, the lower surface, toward the drain port 14c side, that is, in the downward direction, is almost entirely formed in a columnar shape. Further, the pillar-shaped base 28A has a boundary portion connected to the surface of the cover 20 on the drain port 14c side, which is formed in an arc shape or a circular arc shape that expands toward the outside of the lower surface. That is, the strut-like base 28A forms a rounded portion 28a, which is an arc-shaped or circular-arc-shaped surface that gradually expands outward, at the upper portion that contacts the cover 20.

The column-shaped base 28A is provided in a protruding manner in a region away from the cover 20 so that the guide wall 22 extends toward the peripheral edge of the cover 20 and in the direction away from the cover 20. In addition, the pillar-shaped base 28A is arranged so that the guide wall 22 is in contact with or near the lower surface of the cover 20 on the drain port 14c side in the direction of the circumferential edge of the cover 20 and in the direction away from the cover 20. It is installed protrudingly so that it extends towards.

The tapered surface of the tapered part 20c formed on the lower surface of the covering body 20 and the rounded surface of the rounded part 28a of the boundary portion of the columnar base 28A attached to the covering body 20 are formed continuously. .

The guide wall 22 disperses the water flowing in from the outside by the dispersion surface 24, and causes it to flow horizontally or slightly downward in the first space 48a along the guide surface 26. After the water that has flowed in collides with the base 28, it flows down along the surface of the base 28 from the second space 48b to the drain port 14c. That is, the drain cover 12 is configured to guide water using the guide wall 22 and the base 28 to generate a swirling flow.

In other words, the guide wall 22 and the base 28 guide water flowing from the outside into the first space 48a between the plurality of adjacent guide walls 22, and after the water collides with the base 28, the water flows into the base 28 and the guide. It is configured to flow down along the surface of the wall 22.

In this embodiment, the width of the guide wall 22, that is, the length from the base 28 in the radial direction of the cover 20 is set to be 10% or more and 45% or less of the diameter of the cover 20.

Further, the height of the guide wall 22, that is, the length extending downward in the vertical direction from the lower part of the cover body 20 is set to 70% or more and 100% or less of the diameter of the cover body 20.

In this embodiment, the guide wall 22 has a second ridgeline region 42 and a third ridgeline region 46 that constitute a fixed region 44 that is formed to fit into the drain port 14c. The fixed region 44 is a region having an outer shape that fits into the drain pipe outlet portion 60c of the drain pipe main body 60. Specifically, the fixed region 44 is a region where the second ridgeline region 42 is a drain pipe of the drain pipe main body 60. When fitted into the drain port portion 60c, the third ridgeline region 46 is located in a non-contact state with the inner peripheral surface of the main body portion of the drain pipe outlet portion 60c, and the intermediate portion of the first ridgeline region 40 forms a flange. It is located at the upper end portion of 60a. Furthermore, the second ridgeline region 42 has an outer shape that does not lower toward the drain pipe 70 than its position.

The fixed areas 44 are arranged in a ring-like manner in correspondence with the arrangement of the plurality of guide walls 22 at appropriate intervals. In other words, the fixed regions 44 are provided at equal intervals on a circumference whose radius is the distance from the central axis of the cover 20 to the boundary with the second ridgeline region 42.

The guide wall 22 is configured to form a space between the covering body 20 and the fixed area 44, into which water flows inward, and is configured such that the dispersion surface 24 faces outward in the space portion. .

In particular, as shown in FIG. 39, a space 48 (first space 48a) that is connected to the inner surface 54 of the vessel body 50 below the cover body 20 is formed between the adjacent guide walls 22. Furthermore, a space 48 (second space 48b) is formed below the adjacent guide wall 22 and serves as a drainage opening that communicates with the drainage port 14c, so that water flows down without staying there.

The first ridgeline region 40 of the guide wall 22 is configured to be inside the outer circumferential edge of the cover 20 covering the drain port 14c and to protrude slightly outward from the outer circumferential edge of the drain port 14c.

(About water flow)
In the drain cover 12 of the fourth embodiment, as shown by the arrow in FIG. Along the same line and guided by the lower surface of the cover 20, the liquid flows horizontally or slightly downward in the first space 48a.

After colliding with the base 28, the flowing water is rectified according to the spherical or curved shape of the guide surface 26 of the guide wall 22, becomes a swirling flow, and further flows down to the drain port 14c via the second space 48b. .

At this time, the water flowing from the inner surface 54 of the container body 50 into the space 48 (first space 48a) formed between the adjacent guide walls 22 below the cover 20 flows into the space 48 (first space 48a). In the space 48a), the flow becomes a swirling flow and flows down to the space 48 (second space 48b) formed below the base 28 and the guide wall 22 and connected to the drain 14c. As a result, the water that has flowed into the drain cover 12 is smoothly drained from the space 48 (second space 48b) to the drain port 14c with almost no air being involved.

(Modified example)
Next, as a modification of the drain cover 12 according to the fourth embodiment of the present invention, a structure in which the drain cover 12 is attached to the drainage device 16 will be described mainly based on FIG. 41.

The drain cover 12, which is a modification of the fourth embodiment of the present invention, is attached to the drainage device 16 and has a drainage posture in which water can be drained through a space 48 that forms a drainage opening, and a space that forms the drainage opening. It is configured to be operable between a plug position that prohibits drainage through portion 48.

As shown in FIG. 41, a modification of the drain cover 12 according to the fourth embodiment is such that a hole 44c is formed in the base 28, and the support part 84 of the drive mechanism 80 is inserted or screwed into the hole 44c. It is configured to be fixed together.

Note that the configuration of the drive mechanism 80 is similar to the first embodiment or the modification of the second embodiment.

(Fifth embodiment)
Next, a tank system according to a fifth embodiment of the present invention will be described mainly based on FIGS. 42 and 43. However, components that are the same as or correspond to those of the first embodiment are given the same reference numerals and detailed explanations will be omitted.

A tank system according to a fifth embodiment of the present invention includes a bottle trap 100 in place of the S trap 78 disposed downstream of the drain pipe 70 in the tank system of the first embodiment. .

The bottle trap 100 has an inner cylinder part 101 that communicates with the drain pipe 70 and is arranged coaxially with the inner cylinder part 101, has an inner diameter larger than each of the drain pipe 70 and the inner cylinder part 101, and has an outer circumference of the inner cylinder part 101. The outer cylinder part 103 covers the inner cylinder part 101 and is connected to the drain pipe 105 arranged along the radial direction of the inner cylinder part 101. The outer cylinder part 103 is connected to the drain pipe 70 on the upstream side and the inner cylinder part 101 and The main structure includes a coupling part 102 that couples and connects the outer cylinder part 103 in a coaxially arranged state.

The inner cylindrical portion 101 is a tubular member that extends further downward from the drain pipe 70 and has open ends at both ends. An opening 101a, which is an opening facing downward at one end of the inner cylinder part 101, is exposed in the internal space 103x of the outer cylinder part 103, facing the bottom surface of the outer cylinder part 103 and spaced apart therefrom. The opening 101b, which is the other end of the inner cylindrical portion 101, faces the drain pipe 70 and is connected to a coupling portion 102, which will be described later.

The outer cylinder part 103 is arranged coaxially with the inner cylinder part 101, and includes a first cylinder part 103a that accommodates the inner cylinder part 101 in the internal space 103x, and a first cylinder part 103a that extends in the radial direction from the circumferential surface of the first cylinder part 103a. It has a second cylindrical body part 103b that protrudes from the outside, and has a generally horizontal T-shaped appearance when viewed from the front.

The first cylindrical body portion 103a is a tubular portion with open ends at both ends, and the downward opening at one end is closed by the first closing member 104 and the second closing member 106, while the other end is closed by the first closing member 104 and the second closing member 106. The opening 103y is connected to the coupling portion 102 while facing the drain pipe 70 side. Note that the first closing member 104 is further screwed into a second closing member 106 screwed into the first cylindrical body part 103a, and closes the opening at the lower end of the first cylindrical body part 103a. There is. The first closing member 104 and the second closing member 106 constitute the bottom surface of the first cylindrical body portion 103a.

The second cylindrical body part 103b is a tubular part with open ends at both ends, and an opening 103z that is one end penetrates the circumferential surface of the first cylindrical body part 103a and connects the internal space 103x and the second cylinder. It communicates with the body portion 103b. The opening 103z is provided above the lowermost part of the opening 101a of the inner cylinder 101.

The opening at the other end of the second cylindrical body part 103b is connected to the second cylindrical body part 103b by inserting the opening 105a at one end of the drain pipe 105 inside and fastening it with the fixing bolt 79. It communicates with the pipe 105. Note that the opening 105b, which is the other end of the drain pipe 105, is connected to a further external pipe (not shown).

The coupling portion 102 is an annular member having both open ends, and as particularly shown in FIG. 43, the opening at the upper end is fastened with a fixing nut 76 via a packing 77. Further, the opening at the lower end of the coupling part 102 is coupled to the first cylindrical part 103a of the outer cylindrical part 103 via a flange 102a located on the outside of the coupling part 102, and the opening is connected to the first cylindrical part 103a of the outer cylindrical part 103 through a screw thread on the inner circumference of the coupling part 102. The inner cylinder portion 101 is coupled to the inner cylinder portion 102b by screwing the inner cylinder portion 101 thereto. That is, the connecting portion 102 connects the first cylindrical portion 103a of the outer cylindrical portion 103 and the inner cylindrical portion 101 from the outer periphery and the inner periphery, so that the opening 101a of the inner cylindrical portion 101 is It is exposed in the internal space 103x of the outer cylinder part 103 in a state where it faces the bottom surface of the cylinder part 103 and is spaced apart from it.

In the tank body system of this embodiment having the above configuration, when the waste water from the drain pipe 70 enters the bottle trap 100, it is discharged from the inner cylinder part 101, and is discharged from the first cylinder body of the outer cylinder part 103. It stays in the internal space 103x of the portion 103a. When the level of water accumulated in the internal space 103x reaches the opening 103z of the first cylindrical body portion 103a and overflows, the excess water is discharged to the outside from the drain pipe 105 via the opening 103z.

In the bottle trap 100, the opening 103z of the second cylindrical body 103b of the outer cylindrical part 103 is located above the lowermost part of the opening 101a of the inner cylindrical part 101. The drainage water from the inner cylinder part 101 is configured to stay in the inner space 103x of the first cylinder part 103a as a water seal until it reaches an overflow state reaching the opening part 103z. This prevents odor and gas from downstream of the drain pipe 105 from rising up to the inner cylinder portion 101.

Such a bottle trap 100 has the following advantages over the S trap 78 shown in FIG. In other words, in a siphon-type trap such as the S-trap 78, the drainage path and the space for accumulating sealed water are formed continuously in a pipe with the same inner diameter, so that the drainage speed of the downstream piping during drainage is reduced. There is a risk that negative pressure will occur upstream in the pipe due to excessive speed, etc., causing air to be drawn into the pipe and causing intermittent abnormal noises. Since such a phenomenon does not occur in principle since the volume difference between the space and the space where water is accumulated is large, the above-mentioned fear can be suppressed.

In particular, when installing the washbasin/hand washing equipment 10 of each embodiment of the present invention in a store, or in a limited narrow space such as an entrance or a bedroom, the outer diameter of the tank body 14 is relatively small and the inner surface is small. Since the angle is also steep, the flow velocity of the wastewater tends to increase, which causes the problem of the above-mentioned abnormal noise. Therefore, using the bottle trap 100 as a trap that can suppress the generation of abnormal noise is particularly suitable when installing the sink/hand washing equipment 10 in the above-mentioned narrow space.

In the above description, the bottle trap 100 differs in structure and operating principle from the non-siphon type trap of the present invention, that is, the siphon type trap such as the S trap and the P trap, and the bottle trap 100 is different from the non-siphon type trap of the present invention, that is, the siphon type trap such as the S trap and the P trap. This is a typical example of a trap in which water is retained as a seal in a large volume of space and the overflow water is drained from the space. However, the non-siphon type trap of the present invention can also be implemented as a drum trap, belt trap, etc. You may.

Further, in the above description, the bottle trap 100 is combined with the tank system of the first embodiment, but it may be combined with the tank system of other embodiments and modifications thereof.

As mentioned above, although the embodiments of the present invention are disclosed in the above description, the present invention is not limited thereto.

That is, various changes can be made to the embodiment described above in terms of mechanism, shape, material, quantity, position, arrangement, etc. without departing from the scope of the technical idea and purpose of the present invention. and are included in the present invention.

Further, the cover, the guide wall, and the guide member may be molded from plastic or metal.

INDUSTRIAL APPLICATION This invention can suitably utilize a drain cover and a tank body system for washrooms, hand washing, etc.

10 sink/hand washing equipment, 12 drain cover, 14 tank body, 14a upper end, 14b lower end, 14c drain outlet, 16 drainage device (drain pipe unit), 18 discharge device

20 cover body, 20a plate portion, 20b projection portion, 20c tapered portion, 22 guide wall, 24 dispersion surface, 26 guide surface, 26a first guide surface, 26b second guide surface, 28 base portion, 28a rounded portion, 28A strut shape base

30 first plane area, 31 first curved area, 32 second plane area, 33 second curved area, 34 guide member

40 first ridgeline region, 42 second ridgeline region, 46 third ridgeline region, 44 fixed region, 44A fixed structure, 44a columnar member, 44b attachment hole, 44c hole, 48 space, 48a first space, 48b second space section

50 vessel body, 52 vessel body drain port, 54 inner surface, 56 side bottom surface, 58 overflow hole

60 drain pipe body, 60a flange, 60b male thread, 60c drain pipe outlet, 62 lock nut, 64 sliding packing, 66 triangular packing, 68 sponge packing

70 Drain pipe, 72 73 76 Fixing nut, 74 75 77 Packing, 78 S trap, 80 Drive mechanism, 82 Cylindrical part, 84 Support part, 86 Operation member, 88 Transmission member, 90 Discharge device main body, 92 Discharge port, 94 Operation Department

DESCRIPTION OF SYMBOLS 100 Bottle trap, 101 Inner cylinder part, 101a 101b 103y 103z 105a 105b Opening part, 102 Joint part, 102a Flange, 102b Screw, 103 Outer cylinder part, 103a First cylinder part, 103b Second cylinder part, 103x Internal space, 104 first closing member, 106 second closing member

200 foreign matter removal section, 200a removal section main body, 200b through hole

Claims (9)

A cover body capable of shielding the drain port in a plan view;
a base that hangs down from a lower surface facing the drain port when the covering body shields the drain port,
The lower surface of the cover is inclined downwardly away from the upper surface of the cover as it goes from the outside toward the center;
The base has a guide wall protruding in a region close to or far from the lower surface so as to extend toward a peripheral edge of the cover and in a direction away from the cover;
The guide wall has a fixed area that fits into the drain port,
A space portion into which water flows is formed between the covering body and the drain port when the fixed area of the guide wall is fitted into the drain port,
Drain cover. The lower surface of the cover has a tapered part formed in an inverted conical shape,
The drain cover according to claim 1. The base portion is characterized in that a boundary portion connected to the lower surface of the covering body forms an arc-shaped or circular arc-shaped rounded portion.
The drain cover according to claim 1 or 2. The lower surface of the cover has a tapered part formed in an inverted conical shape,
A boundary portion of the base portion that connects to the lower surface of the covering body forms an arc-shaped or circular-arc-shaped rounded portion,
The tapered portion of the cover and the rounded portion of the base are formed continuously,
The drain cover according to claim 1. The lower surface of the covering body has a smooth tapered surface that gradually slopes from the outer peripheral edge of the covering body toward the center side of the covering body toward the lower side that is the drain port side. characterized by having,
The drain cover according to claim 1 or 2. The base portion is formed substantially entirely in a columnar shape, and a boundary region near the lower surface of the covering body is formed in an arc shape or a circular arc shape expanding outward along the lower surface. It is characterized by
The drain cover according to any one of claims 1 to 5. further comprising a foreign matter removal section provided below the lower surface of the cover ;
The drain cover according to any one of claims 1 to 6 . A tank body equipped with a drain port,
A drain cover attached to the drain outlet, the drain cover according to any one of claims 1 to 7;
characterized by having
Tank body system . Further comprising a non-siphon trap provided downstream of the tank body ,
The tank system according to claim 8 .

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