JP7720575B2 - Cover material - Google Patents

Description

The present invention relates to a cover member that covers the drain outlet of a drainage device.

Drainage equipment that generates wastewater during use is equipped with a drainage pipe with a drain outlet to treat the generated wastewater.
Among the components of the drainage piping, the component of the drainage piping for forming a drain outlet on the drainage equipment is particularly called a drainage device.
For drainage appliances that generate wastewater inside the tub during use, such as washbasins, sinks, and bathtubs, a drain outlet can be provided in the tub by attaching a drain device to the bottom of the tub. Also, for drainage appliances that generate wastewater on the water receiving pan during use, such as bathrooms and washing machine pans, a drain outlet can be provided in the water receiving pan by attaching a drain device to the water receiving pan.

Furthermore, a cover member for covering the drain outlet of the drainage device is arranged on the drain outlet depending on the purpose.
For example, in the drain of a sink where large pieces of kitchen waste or large amounts of kitchen waste get mixed in the drain, a garbage basket is placed to collect the kitchen waste so that it does not flow downstream. However, if left as is, the collected kitchen waste is exposed from the drain, which can be unpleasant for people who see it.
To avoid this, as in the invention described in Patent Document 1, a step is provided on the inner surface of the drain outlet, the flange of the trash basket is engaged with this step, and a water passage (opening) is provided to allow food waste to pass through so that the trash basket is placed on top of the flange, and a cover member is arranged to cover the inside of the drain outlet.
The cover member is arranged to cover the trash basket in the drain outlet, thereby concealing the trash basket in the drain outlet and the garbage in the trash basket, and preventing the collected garbage from being exposed from the drain outlet, thereby preventing the user of the sink from feeling uncomfortable.

In addition, wastewater produced in bathrooms may contain hair and other debris, and if these flow out of the bathroom sink drain into the downstream drainage pipe, they may become tangled inside the pipe and clog it.
Therefore, in the cover member described in Patent Document 2, in order to capture hair and other particles in the drainage, multiple small holes are provided in the water-passing section to allow the drainage to pass through, and the cover member is equipped with a collection section that captures hair and other particles mixed in the drainage, and is placed on the drain outlet.
By placing the cover member over the drain outlet, hair and other particles that get mixed into the drainage can be collected, preventing clogging of the drainage pipe.

JP 2006-188899 A JP 2003-261971 A

The cover member attached to the drain outlet of the drainage equipment is originally removable, so it can be purchased separately via mail order via the Internet, so-called e-commerce, or at a home improvement store, etc., and replaced.
This may occur when the original cover member is damaged, or when a customer is looking for a product with a better design or ease of use, and may purchase a new product to replace the original cover member even if it is still usable.
When replacing such a cover, there is a risk that the dimensions of the new cover will not match the drain outlet of the drainage device. The drain outlet of the drainage device and the original cover are designed and manufactured as a set, and the drain outlet and cover are configured to match the shape of the cover to the drain outlet, referencing the dimensions of each other.
On the other hand, it is impossible to design a new replacement cover member with reference to the dimensions of the drain outlet to which it is to be attached.

However, by referring to the "standard dimensions" described below, it is possible to manufacture a cover member with dimensions that fit the drain outlet to some extent.
For example, a manufacturer of tanks and a manufacturer of drainage systems with drain outlets may be separate. When connecting parts made by these different manufacturers, if each manufacturer uses different dimensions, problems may arise due to mismatched connection points. Furthermore, it may be necessary to manufacture multiple products with the same configuration and function but different connection dimensions. To avoid this, related manufacturers and distributors may voluntarily establish shared dimensions based on usage history, intended use, and intended sales, separate from industrial standards, or shared dimensions may be established spontaneously as related companies adjust their specifications to the dimensions of the company that originally manufactured the product. These dimensions are called standard dimensions.
Many drainage devices use this "standard dimension" for the inner diameter of the drain outlet, and therefore, even if the cover member is made by a manufacturer other than the manufacturer that produced the drainage device with the drain outlet, it is possible to position the cover member so that it matches the drain outlet in a plan view, as long as it is designed with reference to the standard dimension of the inner diameter of the drain outlet.

However, the shape and dimensions of drain outlets in the height direction differ not only between different manufacturers but also between products from the same manufacturer, and there are no dimensions that can be considered standard.
This is because, for example, in the case of a sink drain, the layout of components inside the drain may differ, such as when a step of a given diameter is provided inside the drain, and the flange of a trash basket is placed on this step, as in the invention of Patent Document 1, and a cover member is then placed on top of it, or when a double step is provided inside the drain, with a first step and a second step from top to bottom, and the cover member is placed on the first step and the flange of the trash basket on the second step, as shown in Figure 5. Also, sinks may store water, and in this case, the layout of components inside the drain may differ, such as when a plug cap is attached to the water-passing portion of a cover member to hide the water, or when the cover member is removed and a plug cap is attached to cover the entire drain.
As such, the types, shapes, configurations, and layouts of the components attached to drain outlets vary widely, making it impossible to set standard dimensions for the shape and dimensions of drain outlets in the vertical direction.

For this reason, when trying to place a cover member purchased separately from a home improvement store, e-commerce site, etc., inside a drain other than one designed as a set with a drainage device equipped with a drain outlet, the cover member can be placed inside the drain outlet by matching it to the design based on the standard dimensions of the drain outlet's inner diameter.However, the positional relationship between the top end of the drain outlet and the top end of the cover member varies for each cover member and drain outlet, and there have been cases where the top surface of the cover member protrudes too far from the drain outlet, making it difficult to use, or conversely, the top surface of the cover member sinks too far inside the drain outlet, causing dust to accumulate on the top surface.
The present invention was invented in consideration of the above problems, and provides a cover member that can be attached to any drain outlet at the same height relative to the upper end of the drain outlet.

A first invention is a cover member that can be attached to a drain outlet that treats wastewater,
A cover portion that covers the drain outlet;
a flange provided on the outer periphery of the cover portion and engaging with the periphery of the drain outlet;
A water passage portion provided in the cover portion for passing drainage into the drain outlet;
The cover member is characterized by being composed of:

The second invention is a cover member according to the first invention, characterized in that the cover member is attached to the drain outlet having a flange portion on its periphery.

A third invention is a cover member according to the second invention, characterized in that the collar portion covers the entire flange portion.

A fourth invention is the cover member according to the third invention, characterized in that the outer diameter of the collar portion is substantially the same as the outer diameter of the flange portion.
In addition, "the outer diameter of the flange portion and the outer diameter of the flange portion are almost the same" includes not only the case where the outer diameter of the flange portion is exactly the same as the outer diameter of the flange portion, but also the case where the outer diameter of the flange portion is slightly larger or smaller than the outer diameter of the flange portion.

The fifth invention is a cover member according to any one of the first to fourth inventions, characterized in that it includes a positioning portion that positions the cover portion relative to the drain outlet.

The sixth invention is a cover member according to the fifth invention, characterized in that the positioning portion is a wall portion that contacts the inner surface of the drain outlet.

A seventh invention is the second invention, wherein the cover member includes a positioning portion that positions the cover portion with respect to the drain outlet,
The cover member is characterized in that the positioning portion is a locking portion that locks onto the outer edge of the flange portion.

The eighth invention is a cover member according to the first to fourth inventions or the seventh invention, characterized in that the water passage section is equipped with a collection section that collects dust in the drainage water.

According to the present invention, because the flange of the cover member engages with the periphery of the drain outlet, the cover member can be attached to any drain outlet at the same height, regardless of the shape or dimensions of the inside or below the drain outlet, and there is no case where the top surface of the cover member protrudes excessively from the drain outlet to the extent that it interferes with use, or conversely, the top surface of the cover member is significantly recessed into the drain outlet. In addition, the positioning portion can also determine the position of the cover member in a plan view relative to the drain outlet, i.e., its horizontal position, so that the cover member will not come off the drain outlet and prevent proper use.
Furthermore, if the periphery of the drain outlet is provided with a flange, it is also possible to lock the flange of the cover member onto this flange.
In addition, in the case of a drain outlet that has a flange portion as part of its periphery, the flange portion of the cover member can be made the same diameter as or larger than the diameter of the flange portion, so that the flange covers and hides the joint between the tank body or floor and the flange portion, thereby improving the design and preventing dust from accumulating in the joint.

FIG. 1 is a cross-sectional view showing a sink according to a first embodiment. FIG. 3 is a cross-sectional view showing the vicinity of the drain outlet of the first embodiment. FIG. 3 is a reference diagram showing the component configuration of FIG. 2. 1A is a plan view, FIG. 1B is a cross-sectional view, and FIG. 1C is a bottom view of a cover member according to a first embodiment. FIG. 10 is a cross-sectional view showing the vicinity of a drain outlet provided with a conventional cover member. FIG. 10 is a cross-sectional view of a conventional cover member. FIG. 10 is a cross-sectional view showing the vicinity of a drain outlet of a second embodiment. 10A is a plan view, FIG. 10B is a cross-sectional view, and FIG. 10C is a bottom view of a cover member according to a second embodiment. FIG. 10 is a cross-sectional view showing a bathroom according to a third embodiment. FIG. 10 is a cross-sectional view showing the vicinity of a drain outlet of a third embodiment. FIG. 11 is a cross-sectional view showing the member configuration of FIG. 10 . 10A and 10B are a plan view and a cross-sectional view, respectively, of a cover member according to a third embodiment of the present invention; FIG. 10 is a cross-sectional view showing the vicinity of a drain outlet provided with a conventional cover member. FIG. 10 is a cross-sectional view of a conventional cover member. FIG. 10 is a cross-sectional view showing the vicinity of a drain outlet of a fourth embodiment. 10A and 10B are a plan view and a cross-sectional view, respectively, of a cover member according to a fourth embodiment of the present invention; FIG. 10 is a cross-sectional view showing a fifth embodiment. FIG. 10 is a cross-sectional view showing a sixth embodiment. 19(a) is a cross-sectional view showing a state in which the sink is in use, and FIG. 19(b) is an enlarged view of part A in FIG. 19(a) of the seventh embodiment. 13A is a cross-sectional view showing the cover member of the eighth embodiment attached to the drain outlet, and FIG. 13B is a cross-sectional view showing the cover member removed from the drain outlet. 13A is a cross-sectional view showing a state in which the cover member of the ninth embodiment is attached to the drain outlet, and FIG. 13B is a cross-sectional view showing a state in which the cover member has been removed from the drain outlet. FIG. 10 is a cross-sectional view showing the vicinity of a drain outlet according to another embodiment. 23A and 23B are a plan view and a cross-sectional view, respectively, of the cover member of the embodiment of FIG. 22. FIG. 10 is a cross-sectional view showing the vicinity of a drain outlet according to another embodiment. 25A and 25B are a plan view and a cross-sectional view, respectively, of the cover member of the embodiment of FIG. 24.

A first embodiment of the present invention will be described below with reference to the drawings.
The cover member 1 of the first embodiment of the present invention shown in Figures 1 to 6 is a cover member 1 used for a sink N as a drainage device and its tank body, the sink S, and is intended to conceal the inside of the drain outlet 9a.
Furthermore, in this embodiment, for the sake of convenience, two cover members will be described as cover member 1: a conventional cover member F that does not satisfy the requirements of the invention, and a cover member 1 as an embodiment that satisfies the requirements of the invention. Hereinafter, in the description of this embodiment, cover member 1 as an embodiment that satisfies the requirements of the invention will be simply referred to as "cover member 1," and conventional cover member F that does not satisfy the requirements of the invention will be referred to as "conventional cover member F," and the two will be distinguished from each other.

First, the sink N will be described.
The sink N shown in Figure 1 is composed of a worktop W and a cabinet C described below, and drainage piping is installed using a drain outlet main body 9, a coupling member 11, a trap member 12, etc. described below, and a wastebasket 14, a cover member 1, and a conventional cover member F described below are placed at the drain outlet 9a.
The worktop W comprises a counter K made of a metal plate and a sink S, which is a box-like structure with an open top, attached to the counter K. A mounting hole H for mounting the drain outlet body 9 is provided in the bottom surface of the sink S. A recess is formed around the periphery of the mounting hole H, where a flange portion 9b of the drain outlet body 9 (described later) is to be placed, to fit the flange portion 9b.
The cabinet C is a box body that is open at the top and has a door on the front, and a drainage pipe including a drain outlet body 9 is installed inside the cabinet C.
The drain outlet body 9, which serves as a drainage device, is a cylindrical member with a bottom and an opening at the top, and inside it is formed a drain outlet 9a through which drainage water from the sink S flows. The inside of the drain outlet 9a is provided with a first step 9d, which is a step that protrudes inward at a position approximately 20 mm below the top end of the drain outlet 9a, and a second step 9e, which is a step that protrudes further inward below that. The wall surface from the top end of the drain outlet 9a to the first step 9d is provided along the vertical direction. Therefore, the diameter from the top end of the drain outlet 9a to the first step 9d is the same as the "inner diameter of the drain outlet 9a."
In the following description, the "inner diameter of the drain outlet 9a" refers to the "inner diameter of the upper end of the drain outlet 9a," and the diameter of the portion narrowed by the first step 9d or the second step 9e is not described as the "inner diameter of the drain outlet 9a."
The drain outlet body 9 has a flange 9b along the periphery of the upper end. A male thread 9c is provided on the outer surface directly below the flange 9b, and an outlet 10 is provided on the side surface near the bottom of the drain outlet body 9, which allows wastewater from the drain outlet 9a to flow out in the lateral direction.
In addition, the inner diameter of the drain outlet 9a of the drain outlet main body 9 and the outer diameter of the flange portion 9b are designed to "standard dimensions."
Regarding standard dimensions, for example, the manufacturer of the tank body and the manufacturer of the drainage device equipped with the drain outlet 9a (the drain outlet body 9 in this embodiment) are different. When connecting parts made by these different manufacturers, if each manufacturer uses different dimensions, problems may occur where the dimensions of the connection points do not match. Furthermore, it becomes necessary to manufacture multiple types of products with the same configuration and function but different dimensions of the connection points, which is inconvenient in terms of parts management and costs.
To avoid this, apart from industrial standards, there are cases where multiple related manufacturers and sales companies voluntarily set common dimensions based on usage history, intended use, and intended sales, or where common dimensions are naturally set as a result of related companies adjusting the specifications to the dimensions of the company that originally manufactured the product. These dimensions established in this way are called standard dimensions.
In the drain outlet body 9 of this embodiment, the inner diameter of the drain outlet 9a, the outer diameter of the flange portion 9b, the male thread portion 9c, the outer diameter of the position corresponding to the mounting hole H of the drain outlet body 9, etc. are standard dimensions. In addition, the inner diameter of the mounting hole H of the sink S, etc. are designed to match the standard dimensions of the drain outlet body 9. On the other hand, the width in the height direction from the upper end of the drain outlet 9a to the first step portion 9d is not a standard dimension.
The drain port body 9 also includes a nut member D having a female thread portion 13 that screws into the male thread portion 9c.
The trash basket 14 is a component that can be detachably placed inside the drain outlet main body 9, and is composed of a collection section 6 made of punched metal material processed into a hemispherical shape, and a protruding edge section 14a that is placed on the upper surface of the second step section 9e provided at the upper end of the collection section 6.
The outer and inner diameters of the second step 9e of the drain outlet 9a and the outer diameter of the protruding edge 14a of the wastebasket 14 are not standard dimensions.
The joint member 11 is a pipe for connecting components, and in this embodiment, a joint member 11 is used which is a pipe bent into an approximately L-shape that connects the discharge outlet 10 of the drain outlet main body 9 and the trap member 12, and a straight-shaped joint member 11 which connects the trap member 12 and the underfloor piping (not shown).
The trap member 12 is a piping member configured to form a water-sealed section 12a inside by bending the tubular body into an S-shape. The water-sealed section 12a is a section filled with water that is formed by the wastewater stored in the drainage flow path, and odorous air and pests from the sewer side cannot pass through this water-sealed section 12a, thereby preventing odorous air and pests from entering the indoor side.
The downstream side of the trap member 12 is connected to an underfloor pipe provided under the floor, and the underfloor pipe is connected to a sewer pipe.

The conventional cover member F shown in Figures 5 and 6 is a member that is initially placed inside the drain outlet main body 9 and can be attached and detached freely, and is composed of a disk-shaped concealing portion F1, a water passage portion 5 which is an opening for passing drainage water and is provided in the center of the concealing portion F1, and legs F2 which are placed on a first step portion 9d provided around the concealing portion F1.
In addition, this conventional cover member F is designed and manufactured as a set with the drain outlet main body 9, taking into consideration each other's dimensions, and the outer diameter of the concealing portion F1 is designed to match the inner diameter of the drain outlet 9a, and the height of the leg portion F2 is designed so that when the leg portion F2 is placed on the first step portion 9d, the outer edge of the concealing portion F1 is at the same height as the upper end of the drain outlet 9a.

The drainage piping for the sink N is installed as follows: The cabinet C and the worktop W are delivered to the building when the building is constructed with the worktop W attached to the cabinet C, and are fixed to the floor of the building when the drainage piping is installed.
The drain outlet body 9 is inserted from above into the mounting hole H of the sink S of the worktop W, and the underside of the flange portion 9b of the drain outlet body 9 is brought into contact with the upper peripheral surface of the mounting hole H. Next, the female thread portion 13 of the nut member D is screwed onto the male thread portion 9c of the drain outlet body 9 from below the sink S, and the flange portion 9b and the nut member D clamp the peripheral edge of the mounting hole H, thereby fixing the drain outlet body 9 to the sink S. The flange portion 9b is a necessary component for attaching the drain outlet body 9 to the mounting hole H of the sink S.
Next, the outlet 10 of the outlet body 9 is connected to the upper end of the joint member 11 .
Next, the lower end of the joint member 11 is connected to the upper end of the trap member 12, and then the lower end of the trap member 12 is connected to the underfloor piping.
Furthermore, the protruding edge 14a of the trash basket 14 is placed on the second step 9e of the drain outlet 9a, and the leg F2 of the conventional cover member F is placed on the first step 9d, thereby completing the installation of the sink N using the conventional cover member F shown in Figure 5.

Next, the cover member 1 of this embodiment, which satisfies the requirements of the present invention, will be described with reference to Figure 4 etc. The dotted circle in Figures 4(a) and 4(c) indicates the size and position of the drain outlet 9a when the cover member 1 is attached to the drain outlet 9a.
The cover member 1 of this embodiment described below is prepared by the user separately from the sink N at a home improvement store, e-commerce site, etc., and is designed with reference to the standard dimensions, but is not designed with reference to the drain outlet 9a of the sink N described in paragraph 0021. Therefore, parts other than those with reference to the standard dimensions do not necessarily match the drain outlet 9a of the sink N described in paragraph 0021.
However, the design takes into consideration dimensions that can be predicted from common design practice. For example, the drain outlet 9a has a nearly vertical wall surface from the top end to the first step 9d, and the vertical width from the top end of the drain outlet 9a to the first step 9d is set to 15 mm or more in order to accommodate the leg F2 of the conventional cover member F. Based on this prediction, the wall 4a, which will be described later, is designed to be shorter than 15 mm from the underside of the flange 3 so as not to interfere with the first step 9d.
Note that "standard dimensions" are predetermined dimensions, while "dimensions expected from common sense" are dimensions within a certain range, and the two are clearly different. For example, the standard dimension of the inner diameter of the drain outlet 9a of the sink S of the sink N is 145 millimeters, and it is neither larger nor smaller than this dimension. On the other hand, the vertical width from the top end of the drain outlet 9a to the first step 9d, which is "dimensions expected from common sense," is 15 millimeters or more, and various dimensions are possible as long as they are 15 millimeters or more, such as 18 millimeters or 20 millimeters.
The cover member 1 shown in FIG. 4 is composed of a cover portion 2, a flange portion 3, and a wall portion 4a serving as a positioning portion, which will be described below.
The cover portion 2 is arranged inside the drain outlet 9a in a plan view, and is a wall surface that covers the inside of the drain outlet 9a, and consists of a ring portion 2a, an ascending slope portion 2b provided inside the ring portion 2a that forms a gentle ascending slope toward the center, and a descending slope portion 2c that forms a descending slope toward the center.
Between the ascending gradient portion 2b and the descending gradient portion 2c, a water passage portion 5 is provided, which is an opening that allows drainage water to pass from inside the sink S into the drain outlet 9a during use.
Also, a cylindrical wall portion 4a is provided below the ring portion 2a.
The outer diameter of the wall portion 4a is designed with reference to the standard dimensions of the inner diameter of the drain outlet 9a shown by the dotted line in Figure 4 (c) so that the outer surface of the wall portion 4a abuts against the inner surface of the drain outlet 9a and does not cause misalignment.
In addition, the vertical width of the wall portion 4a is designed to be 10 mm, which is sufficiently shorter than the expected minimum width of 15 mm from the top end of the drain outlet 9a to the first step portion 9d, so as not to interfere with the first step portion 9d.
The flange 3 is an annular portion extending radially outward from the ring portion 2a of the cover portion 2, and is provided so as to cover the entire flange portion 9b from above. The outer diameter of the flange 3 is configured to be slightly larger than the outer diameter of the flange portion 9b, based on the standard dimensions of the flange portion 9b. The upper surface of the flange 3 is continuous with the upper surface of the ring portion 2a, and the boundary between the flange 3 and the cover portion 2 cannot be discerned in a plan view. When the cover member 1 is attached to the drain outlet 9a, the portion that covers the drain outlet 9a is the cover portion 2, and the portion that is located outside the drain outlet 9a and on the periphery of the drain outlet 9a is the flange portion 3.

The cover member 1 that meets the requirements of the present invention as described above is used by replacing the conventional cover member F and attaching it to the drain outlet 9a as follows.

First, the conventional cover member F that was originally placed inside the drain outlet 9a is removed.
Next, the cover member 1 is attached to the drain outlet 9a from above so that the outer surface of the wall portion 4a of the cover member 1 is inscribed on the inner surface of the drain outlet 9a. With the outer surface of the wall portion 4a inscribed on the inner surface of the drain outlet 9a, the cover member 1 is no longer moved horizontally and is positioned horizontally.
As shown in FIG. 2, the collar portion 3 abuts against and engages with the upper surface of the flange portion 9b, so that the cover member 1 is also positioned relative to the drain port 9a in the vertical direction.
In this manner, the cover member 1 can be attached to the drain outlet 9a.
In the cover member 1 of the present invention, the height positioning is achieved by engaging the flange 3 with the periphery of the drain outlet 9 a. Therefore, even if the width from the upper end of the drain outlet 9 a to the upper surface of the first step 9 d varies, the cover member 1 can be attached at the same height relative to the upper end of the drain outlet 9 a.
Furthermore, the only parts of the cover member 1 in this embodiment that come into contact with the drain outlet body 9 are parts related to standard dimensions, such as the inner diameter of the drain outlet 9a and the flange portion 9b, or parts whose dimensions can be predicted from common design knowledge, so it can be attached without any problems to the drain outlets 9a of most sinks N.
For example, the outer diameter of the flange portion 3 is designed based on standard dimensions and is slightly larger than the outer diameter of the flange portion 9b of the drain outlet body 9, which is part of the periphery of the drain outlet 9a.Therefore, when installation is complete, as shown in Figure 2, the flange portion 3 covers the entire flange portion 9b, hiding the joint between the flange portion 9b and the sink S.

When drainage occurs in the sink S of the sink N, the drainage water passes through the water passage 5 of the cover member 1 and the trash basket 14, passes through the drain outlet 9a, the inside of the drain outlet body 9, the discharge outlet 10, the coupling member 11, and the trap member 12, and is discharged into the sewer through the underfloor piping. Furthermore, as the drainage water passes through the trash basket 14, any debris mixed in with the drainage water is captured in the collection section 6 of the trash basket 14 and does not flow downstream.

Next, a second embodiment of the present invention will be described with reference to the drawings.
In the second embodiment of the present invention, the piping components including the drainage equipment and drainage device, the configuration and installation method of the drainage piping, and the method of use are all the same as those in the first embodiment except for the cover member 1, so they will be omitted and only the configuration of the cover member 1 of the second embodiment and the installation method to the drain outlet 9a will be explained.

The cover member 1 of this embodiment will be described below with reference to Figure 8 etc. The dotted circle in Figures 8(a) and 8(c) indicates the size and position of the drain outlet 9a when the cover member 1 is attached to the drain outlet 9a.
The cover member 1 of the second embodiment of the present invention is purchased by a user separately from the sink N at a home improvement store, e-commerce site, or other similar retailer. It was designed with reference to standard dimensions, but not with reference to the drain outlet 9a of the sink N described in paragraph 0021. Therefore, parts other than those based on the standard dimensions do not necessarily match the drain outlet 9a of the sink N described in paragraph 0021. However, the design took into account dimensions expected from common design practice. For example, the drain outlet 9a has a nearly vertical wall from its upper end to the first step 9d, and the vertical width from its upper end to the first step 9d is 15 millimeters or more to accommodate the leg F2 of the conventional cover member F. These are predictable aspects of the typical drain outlet body 9. Based on these predictions, the wall portion 4a (described below) is designed to be less than 15 millimeters from the underside of the flange 3 so as not to interfere with the first step 9d.
The cover member 1 shown in FIG. 8 is composed of a cover portion 2, a flange portion 3, a cylindrical portion 4b serving as a positioning portion, and a protrusion portion 4c, which will be described below.
The cover portion 2 is arranged inside the drain outlet 9a in a plan view, and is a wall surface that covers the inside of the drain outlet 9a, and consists of a ring portion 2a, an ascending slope portion 2b provided inside the ring portion 2a that forms a gentle ascending slope toward the center, and a descending slope portion 2c that forms a descending slope toward the center.
Between the ascending gradient portion 2b and the descending gradient portion 2c, a water passage portion 5 is provided, which is an opening that allows drainage water to pass from inside the sink S into the drain outlet 9a during use.
In addition, below the ring portion 2a, there is provided a cylindrical portion 4b having an outer surface with a diameter smaller than the inner diameter of the drain outlet 9a, and a positioning portion consisting of a plurality of protrusions 4c protruding from the lower end of the cylindrical portion 4b toward the outer surface.
The circumscribing circle circumscribing the tip of the positioning portion's protrusion 4c, shown by the dotted line in Figure 8(c), is designed to be approximately equal to the inner diameter of the drain outlet 9a, based on the standard inner diameter of the drain outlet 9a. Therefore, when the cover member 1 is attached to the drain outlet 9a, the tip of the protrusion 4c is inside the drain outlet body 9 and abuts against the inner surface between the top end of the drain outlet 9a and the first step 9d, preventing misalignment. In addition, the vertical width of the cylindrical portion 4b is designed to be 10 mm, which is shorter than the expected minimum width of 15 mm from the top end of the drain outlet 9a to the first step 9d, so as not to interfere with the first step 9d.
The flange 3 is a ring-shaped portion extending radially outward from the ring portion 2a of the cover portion 2, and is provided so as to cover the entire flange portion 9b from above. The outer diameter of the flange 3 is configured to be slightly larger than the outer diameter of the flange portion 9b, based on the standard dimensions of the flange portion 9b. The upper surface of the flange 3 is continuous with the upper surface of the ring portion 2a, and the boundary between the flange 3 and the cover portion 2 cannot be discerned in a plan view. When the cover member 1 is attached to the drain outlet 9a, the portion that covers the drain outlet 9a is the cover portion 2, and the portion that is located outside the drain outlet 9a and on the periphery of the drain outlet 9a is the flange portion 3.

The cover member 1 of the second embodiment of the present invention, as described above, is used by replacing the conventional cover member F and attaching it to the drain outlet 9a as follows.

First, the conventional cover member F that was originally placed inside the drain outlet 9a is removed.
Next, the cover member 1 is attached to the drain outlet 9a from above so that the tip of the protrusion 4c of the positioning part of the cover member 1 is inscribed on the inner surface of the drain outlet 9a. With the tip of the protrusion 4c of the positioning part inscribed on the inner surface of the drain outlet 9a, the cover member 1 is no longer able to move horizontally and is positioned horizontally.
As shown in FIG. 7, the collar portion 3 abuts against and engages with the upper surface of the flange portion 9b, so that the cover member 1 is also positioned relative to the drain port 9a in the vertical direction.
In this manner, the cover member 1 can be attached to the drain outlet 9a.
In the cover member 1 of the present invention, the height positioning is achieved by engaging the flange 3 with the periphery of the drain outlet 9 a. Therefore, even if the width from the upper end of the drain outlet 9 a to the upper surface of the first step 9 d varies, the cover member 1 can be attached at the same height relative to the upper end of the drain outlet 9 a.
Furthermore, the only parts of the cover member 1 in this embodiment that come into contact with the drain outlet body 9 are parts related to standard dimensions, such as the inner diameter of the drain outlet 9a and the flange portion 9b, or parts whose dimensions can be predicted from common design knowledge, so it can be attached without any problems to the drain outlets 9a of most sinks N and can perform the intended function.
For example, the outer diameter of the flange portion 3 is designed based on standard dimensions and is slightly larger than the outer diameter of the flange portion 9b of the drain outlet body 9, which is part of the periphery of the drain outlet 9a.Therefore, when installation is complete, as shown in Figure 7, the flange portion 3 covers the entire flange portion 9b, hiding the joint between the flange portion 9b and the sink S.

When drainage occurs in the sink S of the sink N, the drainage water passes through the water passage 5 of the cover member 1 and the trash basket 14, then passes through the drain outlet, the inside of the drain outlet body 9, the discharge outlet 10, the coupling member 11, and the trap member 12, before being discharged into the sewer through the underfloor piping. Furthermore, as the drainage water passes through the trash basket 14, any debris mixed in with the drainage water is captured in the collection section 6 of the trash basket 14 and does not flow downstream.

Next, a third embodiment of the present invention will be described with reference to the drawings.
The cover member 1 of the third embodiment of the present invention shown in Figures 9 to 14 is a cover member 1 intended to collect hair and other debris as water passes through a drain outlet 9a provided on the floor of a bathroom as a drainage device.
Furthermore, in this embodiment, for the sake of convenience, two cover members will be described as cover member 1: a conventional cover member F that does not satisfy the requirements of the invention, and a cover member 1 as an embodiment that satisfies the requirements of the invention. Hereinafter, in the description of this embodiment, cover member 1 as an embodiment that satisfies the requirements of the invention will be simply referred to as "cover member 1," and conventional cover member F that does not satisfy the requirements of the invention will be referred to as "conventional cover member F," and the two will be distinguished from each other.

First, let me explain about the bathroom.
The bathroom shown in Figure 9 is composed of a bathtub B described below and a washing area pan P located adjacent to the bathtub, and a drainage pipe is installed on the floor of the washing area pan P using a drain outlet main body 9, a trap member 12, an odor prevention tube 12c, etc. described below, and a cover member 1 and a conventional cover member F are placed on the drain outlet 9a.
The bathtub B is a box-like body with an open top, and is configured to store bathwater inside when in use.
The washing area pan P is a waterproof pan provided adjacent to the bathtub B, and is provided with a mounting hole H for mounting the drain outlet body 9. In addition, a recess is formed around the periphery of the mounting hole H, where the flange portion 9b of the drain outlet body 9 (described later) is to be positioned, to fit the flange portion 9b.
The drain outlet body 9 is a cylindrical member, and inside it is formed a drain outlet 9a into which drainage water from the washing area pan P flows in. The inside of the drain outlet 9a is provided with a protrusion 9f for attaching a conventional cover member F and an odor prevention tube 12c, and an inner flange 9g that protrudes inward from the lower end of the drain outlet body 9 and for attaching the odor prevention tube 12c in a watertight manner.
In the following description, the "inner diameter of the drain outlet 9a" refers to the "inner diameter of the upper end of the drain outlet 9a", and the inner diameter of the inner flange portion 9g is not described as the "inner diameter of the drain outlet 9a".
The drain port body 9 has a flange 9b formed along the periphery of the outer periphery at the top end, and a male thread 9c formed on the outer surface directly below the flange 9b.
In the drain outlet body 9 of this embodiment, the inner diameter of the drain outlet 9a, the outer diameter of the flange portion 9b, the male thread portion 9c, the outer diameter of the position corresponding to the mounting hole H of the drain outlet body 9, etc. are standard dimensions. In addition, the inner diameter of the mounting hole H of the sink S, etc. are designed to match the standard dimensions of the drain outlet body 9. On the other hand, the position and shape of the protrusion 9f provided in the drain outlet 9a are not standard dimensions.
The explanation of the standard dimensions has already been given in the first embodiment, so it will be omitted here.
The trap member 12 is a box-shaped member having a female threaded portion 13 at the top that screws into the male threaded portion 9c of the drain outlet main body 9, and has a bowl-shaped water sealing portion 12a inside, as well as a branch pipe portion 12b on the side that connects the piping from the bathtub B to the water sealing portion 12a, and an outlet 10 that discharges the wastewater from the trap member 12.
The odor-proof tube 12c is a generally cylindrical member whose upper portion expands in diameter outward. When the expanded portion fits into the protrusion 9f inside the drain outlet 9a, it abuts against the inner flange 9g, connecting the odor-proof tube 12c to the inner flange 9g in a watertight manner. When the upper end of the odor-proof tube 12c is attached to the drain outlet 9a, the lower end of the odor-proof tube 12c is positioned within the water seal portion 12a. When wastewater (sealed water) accumulates in the water seal portion 12a, a portion of the drainage flow path from the drain outlet 9a to the discharge outlet 10 becomes filled with water. Odor-laden air and pests on the sewer side cannot pass through this filled portion, preventing the backflow of odor-laden air and pests from the sewer side to the indoor side.

The conventional cover member F shown in Figures 13 and 14 is a member that is initially placed inside the drain outlet 9a, and is composed of a disk-shaped cover portion 2 that allows drainage water to pass through, a water-passing portion 5 that has a plurality of small holes 6a in the cover portion 2, a cylindrical leg portion F2 that is provided around the water-passing portion 5 and abuts against the inner surface of the drain outlet 9a, and a groove portion F3 that is provided on the outer surface of the leg portion F2 and fits into the protrusion 9f of the drain outlet 9a.
The water passage portion 5 of this conventional cover member F is a collection portion 6 that is configured from a plurality of small holes 6a for water passage and has the function of collecting hair and the like in drainage water.
In addition, this conventional cover member F is designed and manufactured as a set of members together with the drain outlet main body 9, trap member 12, etc., by referring to each other's dimensions, and the outer diameter of the leg portion F2 is designed to match the inner diameter of the drain outlet 9a, and the groove portion F3 is designed to engage with the convex portion 9f using a rotation lock method, so that when the engagement is complete, the upper end of the drain outlet 9a and the upper surface of the cover member 1 are at the same height.

The drainage piping for the bathroom washbasin pan P is installed as follows. It is assumed that the bathtub B and washbasin pan P are installed in the bathroom in advance, and that an underfloor pipe connected to the sewer is placed below the washbasin pan P. The following explanation will explain how to install the drainage piping to the washbasin pan P. First, below the washbasin pan P, the pipe from the bathtub B is connected to the branch pipe portion 12b of the trap member 12, and the underfloor pipe is connected to the discharge port 10.
Next, the drain outlet body 9 is inserted from above the mounting hole H of the washing area pan P, and the male thread portion 9c of the drain outlet body 9 is screwed into the female thread portion of the trap member 12. As a result, the flange portion 9b of the drain outlet body 9 and the upper surface of the trap member 12 clamp the periphery of the mounting hole H, and the trap member 12 and the drain outlet body 9 are attached and fixed to the mounting hole H of the washing area pan P.
Next, the periphery of the upper end of the odor prevention tube 12c is watertightly connected to the inner flange 9g by utilizing the convex portion 9f inside the drain port 9a.
Furthermore, the convex portion 9f inside the drain outlet 9a is fitted into the groove portion F3 of the conventional cover member F using a rotation lock, thereby completing the construction of the bathroom using the conventional cover member F shown in Figure 13.

Next, a cover member 1 according to this embodiment that satisfies the requirements of the present invention will be described.
The cover member 1 of this embodiment described below is prepared by the user at a hardware store, e-commerce site, or other similar outlet, separately from the drain outlet 9a of the bathroom washbasin pan P, and is designed with reference to standard dimensions, but not with reference to the drain outlet 9a of the washbasin pan P described in paragraph 0034. Therefore, parts other than those that refer to the standard dimensions do not necessarily match the drain outlet 9a of the washbasin pan P described in paragraph 0034. However, the design takes into account dimensions expected from common design practice.
The cover member 1 shown in FIG. 12 is made of a thin metal plate such as stainless steel or copper, and is composed of a disk portion 7 that forms the cover portion 2 and the flange portion 3, and a locking portion 8 that serves as a positioning portion, as described below.
The disk portion 7 is a circular flat plate with a diameter slightly larger than the outer diameter of the flange portion 9b, and is arranged so as to be concentric with the drain outlet 9a and the flange portion 9b when construction is completed. When arranged, the portion located above the drain outlet 9a and covering the drain outlet 9a in plan view is the cover portion 2, and the portion covering the flange portion 9b in plan view is the collar portion 3.
Specifically, the inside of the circle indicating the drain outlet 9a shown by the dotted line in Figure 12(a) is the cover portion 2, and the outside is the flange portion 3. The cover portion 2 is provided with a water passage portion 5 having a plurality of small holes 6a that allow the drainage water to pass through. The water passage portion 5 of the cover member 1 of this embodiment is composed of a plurality of small holes 6a for water passage, and serves as a collection portion 6 having the function of collecting hair and the like in the drainage water; the drainage water passes through these small holes 6a, but dust such as hair contained in the drainage water cannot pass through these small holes 6a and is instead collected.
The locking portion 8 is a protrusion extending downward from the outer edge of the disk portion 7 along the entire circumference, and is locked to the outer surface of the flange portion 9b as shown in FIG.

The cover member 1 that meets the requirements of the present invention as described above is used by replacing the conventional cover member F and attaching it to the drain outlet 9a as follows.

First, the conventional cover member F initially placed inside the drain outlet 9a is released from its engagement and removed from the drain outlet 9a.
Next, the cover member 1 is placed in a position where the disk portion 7 is concentric with the drain outlet 9a and the flange portion 9b in a plan view, and the disk portion 7 is placed over the drain outlet main body 9.
Furthermore, the cover member 1 is positioned horizontally by engaging the inner surface of the engaging portion 8 of the cover member 1 so that it abuts against the outer surface of the flange portion 9b. Also, as shown in Figure 10, the flange portion 3 abuts against the outer edge of the upper surface of the flange portion 9b so that the cover member 1 is positioned vertically relative to the drain outlet 9a.
In this manner, the cover member 1 can be attached to the drain outlet 9a.
The height positioning of the cover member 1 of the present invention is achieved by engaging the collar portion 3 with the upper end of the flange portion 9b. Therefore, the cover member 1 can be attached at the same height relative to the drain outlet body 9 regardless of the internal shape of the drain outlet 9a.
Furthermore, the only parts of the cover member 1 in this embodiment that come into contact with the drain outlet body 9 are parts such as the flange portion 9b that are related to standard dimensions or parts whose dimensions can be predicted from common design knowledge, so it can be attached without any problems to the drain outlets 9a of most washing area pans P and can perform the intended function.

When wastewater is generated on the bathroom washbasin pan P, it passes through the small holes 6a in the collection section 6 of the cover member 1, passes through the drain outlet 9a, into the drain outlet main body 9, the odor control tube 12c, and into the trap member 12, and is discharged into the sewer through the discharge outlet 10 of the trap member 12 and the underfloor piping. Furthermore, as the wastewater passes through the collection section 6, hair and other contaminants mixed in with the wastewater are captured in the collection section 6 and do not flow downstream.

Next, a fourth embodiment of the present invention will be described with reference to the drawings.
In the fourth embodiment of the present invention, the piping components including the drainage equipment and drainage device, the configuration and installation method of the drainage piping, and the method of use are all the same as those of the third embodiment except for the cover member 1, so they will be omitted and only the configuration of the cover member 1 of the third embodiment and the installation method to the drain outlet 9a will be explained.

The cover member 1 of the fourth embodiment of the present invention described below is purchased by a user separately from the sink N at a home improvement store, e-commerce site, or other similar retailer. It was designed with reference to standard dimensions, but not with reference to the drain outlet 9a of the washing pan P described in paragraph 0034. Therefore, parts other than those based on standard dimensions do not necessarily match the drain outlet 9a of the washing pan P described in paragraph 0034. However, the design took into account dimensions expected from common design practice. For example, the drain outlet 9a has a nearly vertical wall surface from the top end to the convex portion 9f, and the vertical width from the top end of the drain outlet 9a to the convex portion 9f is set to 5 millimeters or more, taking into account the thickness of the conventional cover member F. These are predictable configurations of a typical drain outlet body 9. Based on this prediction, the wall portion 4a described below is designed to be shorter than 5 millimeters in height so as not to interfere with the convex portion 9f.
The cover member 1 shown in FIGS. 15 and 16 is made of a thin metal plate such as stainless steel or copper, and is composed of a cover portion 2, a flange portion 3, and a wall portion 4a serving as a positioning portion, which will be described below.
The cover part 2 is a disc-shaped part that is placed inside the drain outlet 9a, and is provided inside with a water passage part 5 that has a plurality of small holes 6a that allow the drainage water to pass through. The water passage part 5 of the cover member 1 of this embodiment is composed of a plurality of small holes 6a for water passage, and serves as a collection part 6 that has the function of collecting hair and the like in the drainage water; the drainage water passes through these small holes 6a, but dust such as hair contained in the drainage water cannot pass through these small holes 6a and is instead collected.
The wall portion 4a is a cylindrical portion extending upward from the periphery of the cover portion 2 to a length of approximately 3 millimeters, and is configured so that the outer surface of the wall portion 4a abuts the inner surface of the drain outlet 9a, based on the standard dimensions of the inner diameter of the drain outlet 9a.
The flange portion 3 is a ring-shaped portion extending outward from the upper end of the wall portion 4a, and is configured to have a diameter slightly larger than the outer diameter of the flange portion 9b, based on the standard dimensions of the outer diameter of the flange portion.

The cover member 1 of the fourth embodiment of the present invention is used by replacing the conventional cover member F and attaching it to the drain outlet 9a as follows.

First, the conventional cover member F initially placed inside the drain outlet 9a is released from its engagement and removed from the drain outlet 9a.
Next, the cover member 1 is attached to the drain outlet 9a from above so that the outer surface of the wall portion 4a of the cover member 1 abuts against the inner surface of the drain outlet 9a. With the wall portion 4a abutting against the inner surface of the drain outlet 9a, the cover member 1 does not move horizontally and is positioned horizontally.
As shown in Figure 15, the flange portion 3 abuts against and engages with the upper surface of the periphery of the drain outlet 9a, including the flange portion 9b, thereby positioning the cover member 1 relative to the drain outlet 9a in the vertical direction as well.
In this manner, the cover member 1 can be attached to the drain outlet 9a.
The height positioning of the cover member 1 of the present invention is achieved by engaging the collar portion 3 with the upper end of the flange portion 9b. Therefore, the cover member 1 can be attached at the same height relative to the drain outlet body 9 regardless of the internal shape of the drain outlet 9a.
Furthermore, the only parts of the cover member 1 in this embodiment that come into contact with the drain outlet body 9 are parts such as the flange portion 9b that are related to standard dimensions or parts whose dimensions can be predicted from common design knowledge, so it can be attached without any problems to the drain outlets 9a of most washing area pans P and can perform the intended function.

When wastewater is generated on the bathroom washbasin pan P, it passes through the small holes 6a in the collection section 6 of the cover member 1, passes through the drain outlet 9a, into the drain outlet main body 9, the odor control tube 12c, and into the trap member 12, and is discharged into the sewer through the discharge outlet 10 of the trap member 12 and the underfloor piping. Furthermore, as the wastewater passes through the collection section 6, hair and other contaminants mixed in with the wastewater are captured in the collection section 6 and do not flow downstream.

Furthermore, in the first embodiment described above, the bottom surface of the sink S and the outer edge of the flange portion 9b are at approximately the same height, so an upward step is created on the bottom surface of the sink S and around the drain outlet 9a, due to the thickness of the flange portion 3.
In contrast to this, as in the fifth embodiment shown in Figure 17 or the sixth embodiment shown in Figure 18, the drain outlet 9a and flange portion 9b of the sink S, which is the water receiving portion of the sink, may be configured to be lower than the bottom surface of the sink S.

In the fifth embodiment shown in Figure 17, a portion that is recessed below the bottom surface of the sink S is provided around the edge of the mounting hole H provided on the bottom surface of the sink S, which serves as the water receiving portion.This forms a recess R on the bottom surface of the sink S when the drain outlet body 9 is attached to the sink S, and the drain outlet 9a and the upper surface of the flange portion 9b are located at the lower end of this recess R.
In the fifth embodiment, the depth of the recess R is adjusted so that when the cover member 1 is placed on the drain outlet 9a, the upper surface of the flange portion 3 and the bottom surface of the sink S, which serves as the water receiving portion, are approximately flush with each other.

In contrast to this, in the sixth embodiment shown in Figure 18, the recessed portion is made deeper than in the fifth embodiment, thereby making the recessed portion R deeper, and the depth of the recessed portion R is adjusted so that when the cover member 1 is placed at the drain outlet 9a, the upper surface of the flange portion 3 is positioned sufficiently lower than the bottom surface of the sink S, which is the water receiving portion.
By configuring it in this way, unlike the sink using the cover member 1 of the first embodiment, it is possible to create a configuration in which there is no upward step on the bottom surface of the sink S around the drain outlet 9a.

In the fifth and sixth embodiments, the outer diameter of the flange 3 of the cover member 1 is configured to be the same as the outer diameter of the flange 9b. In the first embodiment, the outer diameters of the flange 3 of the cover member 1 were almost the same, with the flange 3 of the cover member 1 being slightly larger, so that the flange 3 covered and concealed the joint between the flange 9b and the bottom surface of the sink S. However, in the fifth and sixth embodiments, the outer diameters of the flange 3 and the flange 9b are configured to be exactly the same, allowing the cover member 1 to be placed within the recess R.

The cover member 1, in which the outer diameter of the collar portion 3 and the outer diameter of the flange portion 9b are configured to be exactly the same as described above, may be used not only for the drain outlet 9a of a tank body having a recessed portion R, but also for the drain outlet 9a of a tank body that does not have a recessed portion R, as in the seventh embodiment shown in Figure 19.

In addition, in the first to seventh embodiments described above, a flange portion 9b is provided around the periphery of the drain outlet 9a, and its upper surface constitutes the periphery, but the present invention is not limited to this configuration, and the cover member 1 of the present invention may also be used in drainage equipment in which an opening without a flange portion 9b is provided on the bottom surface of the water receiving portion to form the drain outlet 9a.

In addition, in the first to seventh embodiments, the drain outlet 9a is configured to have a flange portion 9b around its periphery, but it may also be configured such that the drain outlet 9a does not have a flange portion 9b around its periphery, as in the eighth embodiment shown in Figure 20 and the ninth embodiment shown in Figure 21.

In the eighth embodiment shown in Figure 20, an opening with an inner diameter based on standard dimensions is provided on the bottom surface of the sink S, which is the tank body, to form a drain outlet 9a that does not have a flange portion 9b on the periphery.
In this eighth embodiment, a male threaded portion 9c is provided on the periphery of the drain outlet 9a, and a nut member D with a female threaded portion 13 is used below this male threaded portion 9c to fix the drain outlet main body 9 with an attachment portion 9h on its outer surface.

In the ninth embodiment shown in Figure 21, a recessed portion with an inner diameter based on standard dimensions is provided on the bottom surface of the sink S, which is the tank body, to form a drain outlet 9a that does not have a flange portion 9b on the periphery.
In this ninth embodiment, an opening is provided in the bottom surface of the recessed portion, and a coupling member 11 equipped with a screw or the like is connected to the opening, and the downstream side of the coupling member 11 is connected to a trap member 12 (not shown).

The cover member 1 of the eighth embodiment shown in Figure 20 has the same configuration as the cover member 1 of the first embodiment, which has a wall portion 4a as a positioning portion, and the cover member 1 of the ninth embodiment shown in Figure 21 has the same configuration as the cover member 1 of the second embodiment, which has a cylindrical portion 4b and a protrusion portion 4c as positioning portions. Furthermore, the dimensions of each portion, such as the flange portion 3, of the cover member 1 of the eighth embodiment and the cover member 1 of the ninth embodiment are designed with reference to the standard dimensions of the drain opening 9a and flange portion 9b (although the drain opening 9a to be installed does not have a flange portion 9b, the dimensions themselves are designed with reference to the standard dimensions of the flange portion 9b).

The embodiment of the present invention has been described above, but various design changes may be made to the cover member 1 of the present invention without departing from the gist of the invention.
For example, the cover member 1 may be one in which the outer edge of the flange portion 3 is positioned up to the middle of the flange portion 9b, as in the cover member of Figures 22 and 23, or one in which the outer edge of the flange portion 3 is positioned so that it is minimally placed on the flange portion 9b, as in the cover member of Figures 24 and 25.

Furthermore, in each of the above embodiments, the drainage device equipped with the drain outlet 9a is a sink N or a bathroom, but the present invention is not limited to the above embodiments, and the drainage device may also be a washbasin or a bathtub.

Furthermore, the wall portion 4a does not necessarily have to have a cylindrical shape extending directly downward. For example, it may have a truncated cone shape that widens downward, like the wall portion 4a of the cover member shown in Figures 24 and 25, with the lower end of the cone abutting the inside of the drain outlet 9a.

REFERENCE SIGNS LIST 1 Cover member 2 Covering portion 2a Ring portion 2b Upward gradient portion 2c Downward gradient portion 3 Flange portion 4a Wall portion 4b Cylindrical portion 4c Projection portion 5 Water passage portion 6 Collection portion 6a Small hole 7 Disk portion 8 Locking portion 9 Drain outlet main body 9a Drain outlet 9b Flange portion 9c Male thread portion 9d First step portion 9e Second step portion 9f Convex portion 9g Inner flange portion 9h Mounting portion 10 Discharge outlet 11 Joint member 12 Trap member 12a Water sealing portion 12b Branch pipe portion 12c Odor prevention tube 13 Female thread portion 14 Trash basket 14a Flange portion B Bathtub C Cabinet D Nut member F Conventional cover member F1 Blinding portion F2 Leg portion F3 Groove portion H Mounting hole K Counter N Sink P Washing area pan R Recess S Sink W Worktop

Claims (7)

A cover member that can be attached to a drain outlet for treating wastewater,
A cover portion that covers the drain outlet;
a flange provided on the outer periphery of the cover portion and engaging with the periphery of the drain outlet;
A water passage portion provided in the cover portion for passing drainage into the drain outlet;
A positioning part is provided below the cover part, which is movable in the vertical direction relative to the drain outlet and positions it in the horizontal direction,
A cover member characterized in that an upper surface of the flange portion is continuous with an upper surface of the cover portion without any step . A cover member that can be attached to a drain outlet for treating wastewater,
A cover portion that covers the drain outlet;
a flange provided on the outer periphery of the cover portion and engaging with the periphery of the drain outlet;
A water passage portion provided in the cover portion for passing drainage into the drain outlet;
A positioning portion is provided below the cover portion to position the cover portion relative to the drain outlet,
The cover member is characterized in that the positioning portion has a protrusion that protrudes toward and abuts against the inner surface of the drain outlet . 3. The cover member according to claim 1 , wherein the cover member is attached to the drain outlet having a flange portion on its periphery. The cover member according to claim 3 , wherein the collar portion covers the entire flange portion. 5. The cover member according to claim 4 , wherein the outer diameter of the collar portion is substantially the same as the outer diameter of the flange portion. 2. The cover member according to claim 1, wherein the positioning portion positions the drain outlet by being inscribed on an inner surface of the drain outlet. 3. The cover member according to claim 1 , wherein the water passage portion includes a collecting portion that collects dust in the drainage water.