Cover material

Abstract

To provide a cover member, in a cover member to be attached to a drainage port that treats drainage water in a piece of drainage equipment, capable of being attached to the equal position in height with respect to an upper end of the drainage port in any drainage port.SOLUTION: A cover member 1 attachable to a drainage port 9a that treats drainage water includes: a covering part 2 that covers the drainage port 9a; a flange 3 disposed in an outer periphery of the covering part 2 and engaged with a periphery of the drainage port 9a; a positioning part that positions the covering part 2 with respect to the drainage port 9a; and a water passing part 5 disposed in the covering part 2 and passing drainage water into the drainage port 9a. The drainage port 9a is formed by a drainage port body 9 that forms the drainage port 9a inside the drainage port body, and the drainage port body 9 is configured by including a flange part 9b as a part of a periphery of the drainage port 9a. The flange 3 is configured to cover entirely the flange part 9b.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a cover member for covering a drain outlet of a drainage device. [Background technology]

[0002] 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.

[0003] 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 the trash basket is placed on top of the flange, providing a water passage (opening) to allow food waste to pass through, 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.

[0004] 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. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2006-188899 [Patent Document 2] JP 2003-261971 Summary of the Invention [Problem to be solved by the invention]

[0006] The cover member attached to the drain outlet of the drainage equipment is originally removable, so it can be purchased separately and replaced via mail order via the Internet, so-called e-commerce, or at a home improvement store. 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 dimensions of each other, so that the cover will fit the drain outlet. 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.

[0007] 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, when it comes to standard dimensions, a manufacturer may manufacture a tank body and a drainage system with a drain outlet. When connecting parts manufactured 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, intended use, and sales objectives, separate from industrial standards, or related companies may naturally establish shared dimensions as a result of adjusting 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.

[0008] 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, to prevent wastewater from passing through, 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.

[0009] 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 by matching it to the design based on the standard dimensions of the drain outlet's inner diameter, but 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 top. 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. [Means for solving the problem]

[0010] 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:

[0011] A second invention is the 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.

[0012] A third invention is the cover member according to the second invention, characterized in that the collar portion covers the entire flange portion.

[0013] 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.

[0014] A fifth invention is a cover member according to any one of the first to fourth inventions, characterized in that it further comprises a positioning portion that positions the cover portion relative to the drain outlet.

[0015] A sixth invention is the 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.

[0016] 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.

[0017] The eighth invention is a cover member according to the first to fourth inventions, or the seventh invention, characterized in that the water flow section is equipped with a collection section that collects dust in the drainage water. [Effects of the Invention]

[0018] 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 drain outlet has a flange around its periphery, the flange of the cover member can be engaged with 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. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a cross-sectional view showing a sink according to a first embodiment. [Figure 2] FIG. 3 is a cross-sectional view showing the vicinity of the drain outlet of the first embodiment. [Figure 3] FIG. 3 is a reference diagram showing the component configuration of FIG. 2. [Figure 4] 3A is a plan view, FIG. 3B is a cross-sectional view, and FIG. 3C is a bottom view of the cover member of the first embodiment. [Figure 5] FIG. 10 is a cross-sectional view showing the vicinity of a drain outlet provided with a conventional cover member. [Figure 6] FIG. 10 is a cross-sectional view of a conventional cover member. [Figure 7]FIG. 10 is a cross-sectional view showing the vicinity of a drain outlet of a second embodiment. [Figure 8] 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. [Figure 9] FIG. 10 is a cross-sectional view showing a bathroom according to a third embodiment. [Figure 10] FIG. 10 is a cross-sectional view showing the vicinity of a drain outlet of a third embodiment. [Figure 11] FIG. 11 is a cross-sectional view showing the member configuration of FIG. [Figure 12] 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; [Figure 13] FIG. 10 is a cross-sectional view showing the vicinity of a drain outlet provided with a conventional cover member. [Figure 14] FIG. 10 is a cross-sectional view of a conventional cover member. [Figure 15] FIG. 10 is a cross-sectional view showing the vicinity of a drain outlet of a fourth embodiment. [Figure 16] 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; [Figure 17] FIG. 10 is a cross-sectional view showing a fifth embodiment. [Figure 18] FIG. 10 is a cross-sectional view showing a sixth embodiment. [Figure 19] 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. [Figure 20] 13A is a cross-sectional view showing a state in which the cover member of the eighth 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. [Figure 21] 13A is a cross-sectional view showing a state in which a cover member of a ninth embodiment is attached to a 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. [Figure 22] FIG. 10 is a cross-sectional view showing the vicinity of a drain outlet according to another embodiment. [Figure 23] 23A and 23B are a plan view and a cross-sectional view, respectively, of the cover member of the embodiment of FIG. 22. [Figure 24] FIG. 10 is a cross-sectional view showing the vicinity of a drain outlet according to another embodiment. [Figure 25]25A and 25B are a plan view and a cross-sectional view, respectively, of the cover member of the embodiment of FIG. 24. DETAILED DESCRIPTION OF THE INVENTION

[0020] 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 example, 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 cover member 1 as an embodiment that satisfies the requirements of the invention. Hereinafter, in the description of this example, 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.

[0021] 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-shaped body with an open top, attached to the counter K. A mounting hole H is provided in the bottom surface of the sink S, to which the drain outlet main body 9 is attached. A recess is formed around the periphery of the mounting hole H, where a flange portion 9b of the drain outlet main body 9, which will be described later, is disposed, 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 and the like is installed inside the cabinet C. The drain outlet main 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 into which the wastewater 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 portion 9d or the second step portion 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. 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 parts, 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 the usage history, intended use and intended sales purpose, or 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 height direction width 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 screw portion 13 that screws into the male screw portion 9c. The trash basket 14 is a component that is detachably arranged inside the drain outlet main body 9, and is composed of a collection part 6 made of a metal punched material processed into a hemispherical shape, and a protruding edge part 14a that is placed on the upper surface of the second step part 9e provided at the upper end of the collection part 6. The outer and inner diameters of the second step portion 9e of the drain outlet 9a and the outer diameter of the protruding edge portion 14a of the waste basket 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 is used 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 pipe 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, preventing the intrusion of odorous air and pests into 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.

[0022] 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 in a removable manner, and is composed of a disk-shaped concealing portion F1, a water passage portion 5 which is an opening for allowing drainage water to pass through and is provided in the center of the concealing portion F1, and a leg portion F2 which is placed on a first step portion 9d provided around the concealing portion F1. Furthermore, this conventional cover member F is designed and manufactured as a set with the drain outlet main body 9, with reference to 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.

[0023] The drainage piping for sink N is installed as follows. The cabinet C and 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, by placing the protruding edge portion 14a of the trash basket 14 on the second step portion 9e of the drain outlet 9a and placing the leg portion F2 of the conventional cover member F on the first step portion 9d, the installation of the sink N using the conventional cover member F shown in Figure 5 is completed.

[0024] 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. Incidentally, 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. For this reason, 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 millimeters 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 millimeters from the underside of the flange 3 so as not to interfere with the first step 9d. Furthermore, "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. In contrast, 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 covering 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 is composed 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. In addition, between the ascending gradient portion 2b and the descending gradient portion 2c, there is provided a water passage portion 5 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 without causing any 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 upper 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.

[0025] The cover member 1 that satisfies 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.

[0026] 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 able to move horizontally and is positioned horizontally. Furthermore, as shown in FIG. 2, the collar portion 3 comes into contact with and locks onto the upper surface of the flange portion 9b, so that the cover member 1 is also positioned relative to the drain outlet 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 direction is positioned by engaging the flange 3 with the periphery of the drain outlet 9a. Therefore, even if the width from the upper end of the drain outlet 9a to the upper surface of the first step 9d varies, the cover member 1 can be attached at the same height relative to the upper end 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 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 main 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.

[0027] When drainage occurs in the sink S of the sink N, the drainage water in the sink S passes through the water passage part 5 of the cover member 1 and the trash basket 14, passes through the drain outlet 9a, into the drain outlet main body 9, the discharge outlet 10, the joint member 11, and the trap member 12, and is discharged into the sewer through the underfloor piping. In addition, as the drainage water passes through the trash basket 14, any debris mixed in the drainage water is captured in the collection part 6 of the trash basket 14 and does not flow downstream.

[0028] 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 configuration, installation method, and usage method of the drainage piping, including the drainage equipment and drainage device, are all the same as those of 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.

[0029] 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 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 may 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 shorter 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 covering 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 is composed 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. In addition, between the ascending gradient portion 2b and the descending gradient portion 2c, there is provided a water passage portion 5 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 part'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 dimensions of the 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 part 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 portion 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 portion 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 portion 3 is continuous with the upper surface of the ring portion 2a, and the boundary between the flange portion 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.

[0030] 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.

[0031] First, the conventional cover member F that was originally placed inside the drain outlet 9a is removed. Next, cover member 1 is attached to drain outlet 9a from above so that the tip of protrusion 4c of the positioning part of cover member 1 is inscribed on the inner surface of drain outlet 9a. With the tip of protrusion 4c of the positioning part inscribed on the inner surface of drain outlet 9a, cover member 1 will not move horizontally and will be positioned horizontally. Furthermore, as shown in FIG. 7, the collar portion 3 comes into contact with and locks onto the upper surface of the flange portion 9b, so that the cover member 1 is also positioned relative to the drain outlet 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 direction is positioned by engaging the flange 3 with the periphery of the drain outlet 9a. Therefore, even if the width from the upper end of the drain outlet 9a to the upper surface of the first step 9d varies, the cover member 1 can be attached at the same height relative to the upper end 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 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 its 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 main 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.

[0032] When drainage occurs in the sink S of the sink N, the drainage water in the sink S passes through the water passage part 5 of the cover member 1 and the trash basket 14, passes through the drain outlet, into the drain outlet main body 9, the discharge outlet 10, the joint 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 the drainage water is captured in the collection part 6 of the trash basket 14 and does not flow downstream.

[0033] 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 in the drainage water passing through a drain outlet 9a provided on the floor of a bathroom as a drainage device. Furthermore, in this example, 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 cover member 1 as an embodiment that satisfies the requirements of the invention. Hereinafter, in the description of this example, 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.

[0034] First, let me explain about the bathroom. The bathroom shown in Figure 9 consists of a bathtub B described below and a washing pan P located adjacent to the bathtub, and drainage piping is installed on the floor of the washing pan P using a drain outlet main body 9, a trap member 12, an odor-proof 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-shaped body with an opening at the top, and is configured to hold 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 to which the drain outlet main body 9 is attached. In addition, a recess is formed around the periphery of the mounting hole H, where the flange portion 9b of the drain outlet main body 9 described below is to be placed, to fit the flange portion 9b. The drain outlet main 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. The inside of the drain outlet 9a is provided with a protrusion 9f for attaching a conventional cover member F and odor prevention tube 12c, and an inner flange 9g that protrudes inward from the lower end of the drain outlet main 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 provided along the periphery of the outer periphery at the top end, and a male thread 9c provided 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 fitted into the protrusion 9f inside the drain outlet 9a, the expanded diameter portion abuts against the inner flange 9g, and the odor-proof tube 12c is watertightly connected to the inner flange 9g. 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-up portion, preventing the backflow of odor-laden air and pests from the sewer side to the indoor side.

[0035] 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 multiple 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.

[0036] The drainage piping for the bathroom washing pan P is installed as follows. It is assumed that the bathtub B and washing pan P are installed in the bathroom beforehand, and that an underfloor pipe connected to the sewer is placed below the washing pan P. The following explanation explains how to install the drainage piping for the washing pan P. First, below the washing pan P, connect the pipe from the bathtub B to the branch pipe portion 12b of the trap member 12, and the underfloor pipe 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 outlet 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, completing the construction of the bathroom using the conventional cover member F shown in Figure 13.

[0037] Next, a cover member 1 of 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 sink pan P, and is designed with reference to standard dimensions, but not with reference to the drain outlet 9a of the sink 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 sink pan P described in paragraph 0034. However, the design takes into account dimensions that would be 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 that it is concentric with the drain outlet 9a and the flange portion 9b when construction is complete. 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 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 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.

[0038] The cover member 1 that satisfies 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.

[0039] 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 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 cover member 1 is positioned vertically relative to the drain opening 9a by engaging the flange portion 3 with the outer edge of the upper surface of the flange portion 9b. 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 performed by engaging the collar portion 3 with the upper end of the flange portion 9b. Therefore, it can be attached at the same height position 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.

[0040] When wastewater is generated on the bathroom washing area pan P, the wastewater on the washing area pan P passes through the small holes 6a in the collection part 6 of the cover member 1, passes through the drain outlet 9a into the drain outlet main body 9, the odor prevention tube 12c, and the trap member 12, and is discharged from the discharge outlet 10 of the trap member 12 to the sewer side via the underfloor piping. In addition, as the wastewater passes through the collection part 6, hair and the like mixed in the wastewater are captured in the collection part 6 and do not flow downstream.

[0041] 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, installation method, and usage method of the drainage piping 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.

[0042] 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 may 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 practices. For example, the drain outlet 9a has a nearly vertical wall from its upper end to its protruding portion 9f, and the vertical width from its upper end to its protruding portion 9f is 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 expectation, the wall portion 4a (described below) is designed to be shorter than 5 millimeters in height so as not to interfere with the protruding 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 made up of a cover portion 2, a flange portion 3, and a wall portion 4a 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 is 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 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.

[0043] 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.

[0044] 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 FIG. 15, the flange 3 abuts against and engages with the upper surface of the periphery of the drain outlet 9a, including the flange 9b, so that the cover member 1 is positioned 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. In the cover member 1 of the present invention, the height positioning is performed by engaging the collar portion 3 with the upper end of the flange portion 9b. Therefore, it can be attached at the same height position 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.

[0045] When wastewater is generated on the bathroom washing area pan P, the wastewater on the washing area pan P passes through the small holes 6a in the collection part 6 of the cover member 1, passes through the drain outlet 9a into the drain outlet main body 9, the odor prevention tube 12c, and the trap member 12, and is discharged from the discharge outlet 10 of the trap member 12 to the sewer side via the underfloor piping. In addition, as the wastewater passes through the collection part 6, hair and the like mixed in the wastewater are captured in the collection part 6 and do not flow downstream.

[0046] 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 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.

[0047] In the fifth embodiment shown in Figure 17, a portion recessed below the bottom surface of the sink S is provided around 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 main 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 the top surface of the flange 3 and the bottom surface of the sink S, which is the water receiving portion, are substantially flush with each other when the cover member 1 is placed over the drain outlet 9a.

[0048] 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. With this configuration, unlike the sink using the cover member 1 of the first embodiment, it is possible to achieve a configuration in which no upward step is created on the bottom surface of the sink S around the drain outlet 9a.

[0049] In the fifth and sixth embodiments, the outer diameter of the flange 3 of the cover member 1 is set to the same diameter as the outer diameter of the flange 9b. In the first embodiment, the outer diameters of the flange 3 of the cover member 1 are almost the same, with the flange 3 of the cover member 1 being slightly larger, so that the flange 3 covers and hides 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 set to exactly the same diameter, so that the cover member 1 can be placed inside the recess R.

[0050] 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 each other 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.

[0051] Furthermore, 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 forms the periphery, but the present invention is not limited to the above configuration, and the cover member 1 of the present invention may also be used in a drainage device 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.

[0052] Furthermore, in the first to seventh embodiments, the drain outlet 9a is configured to have a flange portion 9b around its periphery, but it is also possible to configure the drain outlet 9a so that it 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.

[0053] 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 thread portion 9c is provided on the periphery of the drain outlet 9a, and a nut member D with a female thread portion 13 is used below this male thread portion 9c to fix the drain outlet main body 9 with an attachment portion 9h on its outer surface.

[0054] 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, and the downstream side of the coupling member 11 is connected to a trap member 12 (not shown).

[0055] 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. In addition, 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).

[0056] 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 in 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 in Figures 24 and 25.

[0057] In addition, 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.

[0058] Furthermore, the wall portion 4a does not necessarily have to have a cylindrical shape extending directly downward, but may have a truncated conical shape that widens in diameter downward, such as 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. [Explanation of symbols]

[0059] 1 Cover member 2 Covering portion 2a Ring section 2b Uphill section 2c Downward slope section 3 Flange section 4a Wall portion 4b Cylindrical portion 4c Projection 5 Water flow part 6 Collection part 6a Small hole 7 Disc part 8 Locking part 9 Drain port body 9a Drain port 9b Flange portion 9c Male thread portion 9d First step 9e Second step 9f Convex part 9g Inner flange 9h Mounting part 10 Discharge port 11 joint member 12 trap member 12a Sealing section 12b Branch pipe section 12c Odor prevention tube 13 Female thread 14 Garbage basket 14a Flange B Bathtub C Cabinet D Nut material F Conventional cover material F1 Blindfold F2 Leg F3 Groove H Mounting hole K Counter N Sink P Washing area pan R Recessed part S sink W worktop

Claims

1. 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.

2. 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. 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.

4. The cover member according to claim 3 , wherein the collar portion covers the entire flange portion.

5. 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.

6. The cover member according to claim 1, characterized in that the positioning portion is positioned by being inscribed on the inner surface of the drain outlet.

7. 3. The cover member according to claim 1, wherein the water passage portion includes a collection portion that collects dust in the drainage water.

Images