JP7378008B2 - Drain cover and tank system - Google Patents

Description

TECHNICAL FIELD This 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 Publication Japanese Patent Application Publication No. 2010-59701

However, the flow of water flowing into the drain cover is adjusted to reduce splashing, or the amount of water is discharged from the drain pipe to save water, so air is removed. In some cases, the water may be vomiting foamy water. Such foamy water tends to cause air to become trapped, which may impede smooth drainage. That is, the current situation is that air entrainment impedes the drainage performance of the tank body, causing a problem of rising water level. Further, depending on the direction of the water flow, a vortex may be generated on the tank body, and the water flow may flow into the drain port together with the vortex, thereby causing a situation in which air is also drawn in. Furthermore, water flows from opposite directions occur on the tank body, and when these water flows collide with each other, the air generated is caught in the water flow, and these situations also prevent smooth drainage. This is thought to be a hindering factor.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an initial object of the present invention is to provide a drain cover that can reduce air entrainment and suppress water level rise during drainage, and a tank body having the drain cover. The goal is to provide a system.

The drain cover according to claim 1 of the present invention includes a cover that can shield a drain in a plan view, and three or more covers that are formed radially from the center of the cover in a plan view, and A dispersion surface that protrudes downward from the drain port, and a dispersion surface that disperses water flow by colliding with water from outside the drain port, and a dispersion surface that disperses water flow from different directions by guiding water to the center of the cover body. a guide wall having a guide surface that causes flows to collide with each other to encourage water to fall downward; the cover and the guide wall are not integrated.

The drain cover according to claim 2 of the present invention includes a cover that can shield the drain in a plan view, and three or more covers that are formed radially from a perpendicular line passing through the center of the cover in a plan view. , a dispersion surface that protrudes downward from the cover body and into the interior of the drain port, faces along the outer edge of the drain port, and disperses water flow by colliding with water from the outside; and a generally wall-shaped guide wall having a guide surface that extends from the dispersion surface toward a perpendicular line passing through the center of the covering body and guides water toward the perpendicular line passing through the center of the covering body. However, the cover and the guide wall are not integrated.

The drain cover according to claim 3 of the present invention further includes a base that hangs down from the center of the cover, the cover and the base are not integrated, and the guide wall is connected to the base. are doing.

In the drain cover according to claim 4 of the present invention, the guide wall is configured such that a first space is formed between adjacent guide walls, and the base portion is connected to the first space from the inner surface of the vessel body. The water flowing into the space collides with the space and flows to the drain port below.

In the drain cover according to claim 5 of the present invention, the guide wall has a first plane area located closer to the cover body and a second plane area located closer to the drain outlet side, and the guide wall has a second plane area located closer to the drain outlet side. The flat area is fixed to the drain port, and is configured to form a drain opening between the cover body and the drain port, and take a draining position that promotes drainage.

In the drain cover according to claim 6 of the present invention, the base moves up and down when pressed from the drain port side, thereby forming a drain opening between the cover body and the drain port. and a stopper position that brings the covering body and the drain port into close contact with each other to stop the downward movement of waste water and allow water to be stored in a tank body provided with the drain port. Configured for operation.

In the drain cover according to claim 7 of the present invention, the cover body has a substantially perfect circular shape in plan view, and the guide wall has a diameter of 10% or more and 45% or less of the diameter of the cover body. It has a guide surface with set dimensions.

A tank system according to claim 8 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 7 of the present invention is provided. Equipped with a drain cover.

The tank system according to claim 9 of the present invention further includes a non-siphon trap provided downstream of the tank.

According to the present invention, it is possible to provide a drain plug and a tank body with a drain plug that can suppress a rise in water level during draining even in a narrow washbasin or a tank body having various shapes and sizes. .

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 FIG. 1 is an illustrative perspective view of a tank body with a drain plug, which is an embodiment of the present invention. FIG. 1 is a partially sectional front view of a tank body with a drain port cover according to an embodiment of the present invention. FIG. 1 is an illustrative front view, partially in cross section, of a drain pipe unit 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 plan view of the drain cover. FIG. 3 is an illustrative bottom view of the drain cover. FIG. 3 is an illustrative bottom view of the drain cover showing the flow of water. It is an illustrative front view, partially in cross section, showing the flow of water in the sink/hand washing equipment. FIG. 6 is a perspective illustrative view showing a second embodiment of the drain port cover. FIG. 11 is an illustrative bottom view of the drain port cover shown in FIG. FIG. 11 is an illustrative front view of the drain port cover shown in FIG. FIG. 11 is an illustrative plan view of the illustrated drain port cover. FIG. 3 is an illustrative bottom view of the drain cover showing the flow of water. 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. 7 is an illustrative perspective view of a drain cover according to a third embodiment. FIG. 17 is an illustrative bottom view of the drain port cover shown in FIG. FIG. 17 is an illustrative front view of the drain port cover shown in FIG. FIG. 19 is an illustrative bottom view of the drain port cover shown in FIG. It is an illustrative front view showing a part of a tank body with a drain port cover in a cross section according to a third embodiment. It is a perspective view illustrative view of the drain outlet cover of 4th Embodiment. It is a perspective view illustrative view of the drain outlet cover of 4th Embodiment. FIG. 22 is an illustrative view of the drain outlet cover, in which (A) is a front view and (B) is a side view. FIG. 22 is an illustrative bottom view of the drain port cover shown in FIG. FIG. 22 is an illustrative perspective view showing how to attach the illustrated cover and the guide member. FIG. 22 is a cross-sectional illustrative view showing a state in which the drain port cover shown in FIG. 22 is attached to the drain port. FIG. 22 is an illustrative bottom view of the drain port cover shown in FIG. FIG. 22 is an illustrative front view, partially in cross section, showing a state in which the illustrated drain port cover is attached to the drain port. FIGS. 3 to 8 are illustrative views of modified examples of the embodiment shown in FIGS. 3 to 8, in which (A) is a perspective view, and (B) is a partially sectional front view. FIGS. 17 to 19 are illustrative views of modified examples of the illustrated embodiment, in which (A) is a perspective view and (B) is a partially sectional front view. It is an illustrative front view with a part of the tank body system which is the 5th embodiment of the present invention in cross section. 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 called 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 has a cover 20 constituting the main body of the drain cover, and three or more elements extending radially outward from the center of the cover 20 in plan view. A guide wall 22 is formed and projects downward from the cover body 20.

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.

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 extending downward from the center of the cover 20 and/or a columnar base 28A that supports the drain cover 12 and the guide wall 22. However, FIG. 4 shows a configuration including only 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 cover 20 and the guide wall 22 .

A column-shaped base 28A, which is not shown in FIG. 4 and will be explained in the embodiment described later, is also integrated with the guide wall 22 and forms part of a guide member 34 that is configured as a separate member from the cover 20. are doing. 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.

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

In the drainage device (drain pipe unit) 16 constituting the tank system, the configuration downstream from the drain port 14c is 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, the drain cover 12 according to the first embodiment of the present invention will be described mainly based on FIGS. 3 to 10.

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.

In a plan view, four guide walls 22 are arranged at the same intervals and extend radially outward from the center of the cover 20. The central angle formed by adjacent guide walls 22 is 45°.

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.

As particularly shown in FIG. 6, 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 outer 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 particular, as shown in FIG. 6, 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 a first ridgeline region 40, a second ridgeline region It is divided into a 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.

As shown in particular in FIGS. 5 and 6, 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, that is, the end surface, of the guide wall 22 has 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. is forming.

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 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. 4, a space 48 (first space 48a) is formed between adjacent guide walls 22, which is connected to the inner surface 54 of the container body 50 below the cover body 20. Further, below the first space 48a, a space 48 (second space 48b) is formed which serves as a drainage opening communicating with the drain port 14c.

A portion of the guide wall 22 corresponding to the second ridgeline region 42 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. Equipped with

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.

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 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 following.

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 angle of the flow bundle with respect to the vertical is 10° or more and 13° or less.

The drain port 14c is formed as a portion beyond the tapered portion of the upper opening of the drain pipe main body 60 of the drainage device (drain pipe unit) 16 fitted in the container body drain port portion 52 of the container body 50 of the tank body 14. ing.

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 by rotation or vertical movement.

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.

According to this first 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.

Note that the aspect of the discharge device 18 is not limited to the illustrated aspect, and in addition to the operation part 94, the user can mix warmed water and unheated water in the tap water in a desired ratio, An embodiment may be provided in which a lever that can be operated to discharge clean water at a desired temperature is provided. In such a case, it goes without saying that the above-mentioned discharge device 18 is provided with a special device capable of heating and mixing the tap water.

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. )16.

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 body 50 positioned 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, as shown by the arrows in FIGS. 9 and 10, water flowing in from the outside is dispersed by the dispersion surface 24 of the guide wall 22, and 26 and guided to the lower surface of the covering body 20, it 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 according to the surface shape, 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 vessel 50 connected to 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.

(Second embodiment)
Next, a drain cover 12 according to a second embodiment of the present invention will be described mainly based on FIGS. 11 to 16.

The drain cover 12 of the second embodiment does not have a base 28 and includes a cover body 20 and a guide wall 22 extending downward from a plate portion 20a of the cover body 20.

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 guide wall 22 is a plate-shaped body that extends downward from the lower surface of the cover 20 and extends along the circumference and lower side of the cover 20. 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 is a plate-shaped body having a planar shape whose width decreases in stages.

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 outer 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 particular, as shown in FIG. 13, 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 a first ridgeline area, a second ridgeline area. 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 ridgeline region 42 is a region where the width from the base 28 on the perpendicular side passing through the center of the cover 20 decreases on the side near the lower end of the guide wall 22, and is a region where the width decreases from the base 28 on the side of the perpendicular line passing through the center of the cover 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 particularly shown in FIG. 12, the guide wall 22 has planar guide surfaces 26 formed on both sides thereof. 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 the 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. Note that the cross-sectional shape of the guide wall 22 may be tapered.

The outer surface of the guide wall 22 forms a planar 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.

The dispersion surface 24 is a plane 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.

The guide wall 22 has a substantially planar inner surface on the side of a perpendicular line passing through the center of the cover 20, and a space 48 (third space 48c) between the inner surfaces of the guide walls 22 at opposing positions. ) is formed.

That is, in this embodiment, the guide wall 22 is a plate-shaped body formed independently at a certain distance from a perpendicular line extending downward from the center of the cover body 20. As described above, the guide wall 22 extends downward from the center side of the cover body 20, expands outward from the center side, and is integrated with 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, 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. .

A portion of the guide wall 22 corresponding to the second ridgeline region 42 is configured to be inside the outer circumferential edge of the cover 20 covering the drain port 14c and to slightly protrude outward from the outer circumferential edge of the drain port 14c.

In this second embodiment, there is no base 28 in the first embodiment, there is no guide wall 22 on the perpendicular side passing through the center of the cover 20, and there is no space between the inner surfaces of each guide wall 22. A space 48 (third space 48c) is formed. As shown in FIGS. 15 and 16, the water that collided with the dispersion surface 24 and then flowed into the center side along the guide surface 26 of the guide wall 22 and the water that flowed into the adjacent guide wall 22 are transferred to the space 48 of the guide wall 22. They collide with each other in the third space 48c and flow down into the drain port 14c below.

In this second embodiment, the number of guide walls 22 is greater than the number of guide walls 22 in the first embodiment. That is, eight guide walls 22 are arranged at the same intervals and extend radially outward from the center of the cover 20. The central angle formed by adjacent guide walls 22 is 22.5°.

(Third embodiment)
Next, a drain cover 12 according to a third embodiment of the present invention will be described mainly based on FIGS. 17 to 21.

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 guide wall 22 is a plate-shaped body that extends downward from the lower surface of the cover 20 and extends along the circumference and lower side of the cover 20. 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.

As particularly shown in FIG. 13, 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 horizontal direction, and a drain port cover 12 fixed to the tank body 14. The second curved surface area 33 is fitted into the drain port 14c in order to do this.

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. 19, 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 a first ridgeline region 40, a second ridgeline region 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 of the drain pipe outlet portion 60c having the same inner diameter.

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 surface, and is configured to guide water from the outside toward the inside along the surface. Note that the cross-sectional shape of the guide wall 22 may be tapered.

The first ridgeline region 40 of the guide wall 22 constitutes 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, 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 particular, as shown in FIG. 19, 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 first space 48a and serves as a drainage opening communicating with the drain port 14c, so that water flows down without being retained.

In this embodiment, the guide wall 22 is a plate-shaped body 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, It extends outward from the center of the cover 20 and is integrated with the cover 20 and the column-shaped 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 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, 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.

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. .

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 third embodiment having the above-described configuration, water flowing from the outside in the direction indicated by the arrow in FIGS. 24, and is 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.

(Fourth embodiment)
Next, a drain cover 12 according to a fourth embodiment of the present invention will be described mainly based on FIGS. 22 to 28.

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.

In the drain cover 12 of this fourth embodiment, as particularly shown in FIG. 26, the cover 20, the base 28, and the guide wall 22 are not integrated, but are configured to be attached to the cover 20. A pillar-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 flat surface so as to be attached to the lower surface of the cover 20.

A protrusion 20b serving as a fixing portion for fixing the guide member 34 by fitting into a mounting hole 44b provided in the columnar base 28A is provided on the lower surface of the cover 20.

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.

In particular, as shown in FIG. 23, 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 extends along the circumference and lower side of the cover 20. 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.

As particularly shown in FIG. 24, 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 outer 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 particular, as shown in FIG. 24, 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 and a second ridgeline region 40. It is divided into a 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.

As shown in particular in FIGS. 23 and 24, the guide wall 22 has 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. Note that the cross-sectional shape of the guide wall 22 may be tapered.

The outer surface of the guide wall 22, that is, the first ridgeline region 40 is a planar dispersion surface 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. 24 is formed.

The dispersion surface 24 is a plane 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 a plate-shaped body 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, It extends outward from the center of the cover 20 and is integrated with the column-shaped 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, 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, 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. .

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

(About water flow)
In the drain cover 12 of the fourth embodiment, as shown by the arrows in FIGS. 27 and 28, water flowing in from the outside is dispersed by the dispersion surface 24 of the guide wall 22 and guided. It flows along the surface 26 and toward the lower surface of the cover 20 in the horizontal direction or slightly downward in the first space 48a. After colliding with the base 28, the flowing water is rectified along the guide surface 26 of the guide wall 22 and according to the surface shape of the guide surface 26, and further passes through the second space 48b to the drain port 14c. flowing down.

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 fourth embodiment of the present invention, a structure in which the drain cover 12 is attached, as a drain cover 12 and a tank system equipped with the drain cover 12, will be mainly explained based on FIG. explain.

In the fourth embodiment, the drain cover 12 and the tank body system including the drain cover 12 are modified examples of the fourth embodiment. Although it is fixed in the drainage position, it is configured to be movable between a drainage position in which water can be drained through the space 48 constituting the drainage opening and a stopper position in which drainage is prohibited through the drainage opening; The difference is that the drain port 14c is formed in a manner that it can be inserted into and removed from the drain port 14c.

As shown in FIG. 30, the drain cover 12 constituting the drainage device (drain pipe unit) 16 of the modified example of this embodiment has a base 28 with a mounting hole for attaching the columnar member 44a to the fixed structure 44A. 44b is bored.

(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 angle of the flow bundle with respect to the vertical is 10° or more and 13° or less.

The drain port 14c is configured as a portion of the upper opening of the drain pipe main body 60 of the drainage device (drain pipe unit) 16 fitted in the container body drain port portion 52 of the container body 50 of the tank body 14, which is located behind the tapered portion. ing.

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 by rotation or vertical movement.

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.

Unlike the fourth embodiment shown in FIGS. 22 to 27, the drain cover 12 constituting the drainage device (drain pipe unit) 16 of the modified example of this embodiment has a guide wall as shown in FIG. The outer shape of the guide wall 22 is formed to be slightly smaller than the outer shape of the guide wall 22 shown in FIGS. 22 to 27 so that the guide wall 22 can be fitted 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 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 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 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.

(About water flow)
In the drain cover 12 of the fourth embodiment having the above-described 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 drainage device 16, which is a modification of the tank system having the drain cover 12 according to the fourth embodiment of the present invention, will be explained mainly based on FIG. I will explain.

The drain cover 12, which is a modification of the fourth embodiment, has the following features: whereas the drain cover 12 of the third embodiment is fixed in a drainage posture through which water can be drained through the drain cover 12, It is configured to be movable between a drainage position that allows drainage through the space 48 constituting the drainage opening and a plug position that prohibits drainage through the drainage opening, and is formed to be freely insertable and removable in the drainage opening 14c. There is a difference that there is.

The drain cover 12 constituting the drainage device (drain pipe unit) 16 of the modified example is different from the third embodiment shown in FIGS. 17 to 21, and as shown in FIG. 31, the outer shape of the guide wall 22 is The guide wall 22 is formed to have a slightly smaller outer shape than the guide wall 22 of the third embodiment so that it can be fitted 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 tank system having the drain cover 12 of this modification includes a drive mechanism 80 below the columnar member 44a similar to the tank system shown in FIG. 29, which is a modification of the fourth embodiment. Therefore, the configuration and operation of the drive mechanism 80 are similar to the tank system shown in FIG. 29, and the description of the tank system will be used as an explanation, and detailed explanation thereof will be omitted.

(Fifth embodiment)
Next, a tank system according to a fifth embodiment of the present invention will be described mainly based on FIGS. 32 and 33. 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.

The tank system according to the 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. 33, 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 opened to the outside. 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. 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, but the non-siphon 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.

For example, in other embodiments of the above-described modification, the drain cover may be fixed directly to the drain or to a drive member provided on the drain pipe body of the drainage device. can.

Further, the cover, the guide wall, and the guide member may be formed of 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, 22 guide wall, 24 dispersion surface, 26 guide surface, 26a first guide surface, 26b second guide surface, 28 base, 28A pillar-shaped base, 30 first plane area, 31 first curved area, 32 second flat area, 33 second curved area, 34 guide member, 40 first ridgeline area, 42 second ridgeline area, 44 fixing area, 44A fixing structure, 44a columnar member, 44b mounting hole, 46 third ridgeline region, 48 space, 48a first space, 48b second space, 48c third space

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, 105 drain pipe, 72, 73, 76 fixing nut, 74, 75, 77 packing, 78 S trap

80 drive mechanism, 82 columnar part, 84 support part, 86 operation member, 88 transmission member, 90 discharge device main body, 92 discharge port, 94 operation part

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 Cylindrical body part, 103x Internal space, 104a First closing member, 104b Second closing member

Claims (7)

A cover body capable of shielding the drain port in a plan view;
Three or more drain holes are formed radially from the center of the covering body in a plan view, and protrude downward from the covering body, and disperse water flow by colliding with water from outside the drain port. a guide wall having a dispersion surface and a guide surface that guides the water to the center of the covering body to cause water flows from different directions to collide with each other and encourage the water to fall downward;
a base that hangs down from the center of the covering;
Equipped with
The guide wall is
It is connected to the base and has a first plane area located closer to the cover body and a second plane area located closer to the drain port,
The second planar area is fixed to the drain port, and is configured to form a drain opening between the cover and the drain port to take a drainage posture that promotes drainage;
the cover and the base are not integrated;
Drain cover. A cover body capable of shielding the drain port in a plan view;
Three or more are formed radially from the side of a perpendicular line passing through the center of the covering body in a plan view, and protrude downward from the covering body to the inside of the drain port, and are oriented along the outer edge of the drain port. a dispersion surface that faces the water from the outside and disperses the flow of water by colliding with the water from the outside; a generally wall-shaped guide wall having a guide surface for guiding toward the perpendicular side;
a base that hangs down from the center of the covering;
Equipped with
The guide wall is
It is connected to the base and has a first plane area located closer to the cover body and a second plane area located closer to the drain port,
The second planar area is fixed to the drain port, and is configured to form a drain opening between the cover and the drain port to take a drainage posture that promotes drainage;
the cover and the base are not integrated;
Drain cover. The guide wall is configured such that a first space is formed between adjacent guide walls,
The base is configured such that water flowing into the first space from the inner surface of the vessel collides with the base and flows to the drain port below.
The drain cover according to claim 1 or 2 . The base moves up and down when pressed from the drain port side, thereby forming a drainage opening between the cover body and the drain port to promote drainage, and a drain posture between the cover body and the drain port. and a stopper position in which the drain port is brought into close contact with the drain port to stop the downward movement of the waste water and to allow water to be stored in the tank body provided with the drain port.
The drain cover according to claim 1 or 2 . The cover has an approximately perfect circular shape in plan view,
The guide wall has a guide surface with a size set to 10% or more and 45% or less of the diameter of the covering body.
The drain cover according to any one of claims 1 to 4 . A tank body equipped with a drain port,
A drain cover attached to the drain outlet, comprising the drain cover according to any one of claims 1 to 5.
Tank body system . further comprising a non-siphon trap provided downstream of the tank body;
The tank system according to claim 6 .

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