Drain plug

Abstract

To provide a drain plug with improved workability in maintenance work.SOLUTION: A drain plug disposed in a drain part provided at a bottom of a washbowl comprises a drain pipe and a drain catch basin to be attached to the drain part. The drain pipe includes a cylinder part inserted into the drain part, and a flange part positioned inside the drain part when the cylinder part is inserted into the drain part, the flange part protruding outward from the cylinder part. The flange part is provided below the drain catch basin.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE Aspects of the present invention generally relate to drain plugs. [Background technology]

[0002] 2. Description of the Related Art There is known a drain plug (drain socket) that is connected to a drain provided at the bottom of a wash basin. Such a drain plug may be attached below the wash basin. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-053672 A Summary of the Invention [Problem to be solved by the invention]

[0004] When a drain plug is attached to the underside of a washbasin, the installer must bend over to attach and remove the drain plug during maintenance, etc. For example, when attaching the drain plug from the underside of the washbasin, it may be difficult to position the drain of the washbasin and the drain plug.

[0005] The aspects of the present invention have been made based on the recognition of such problems, and an object of the present invention is to provide a drain plug that improves the ease of maintenance work. [Means for solving the problem]

[0006] The first invention is a drain plug that is placed in a drain section provided at the bottom of a washbasin, and comprises a drain pipe attached to the drain section, and a drain strainer, the drain pipe having a tubular portion that is inserted into the inside of the drain section, and a flange portion that is located inside the drain section when the tubular portion is inserted into the inside of the drain section and protrudes outward from the tubular portion, and the flange portion is provided below the drain strainer.

[0007] This drain plug allows the drain pipe to be attached to the washbasin from above. In addition, in a washbasin with a drain pipe attached in this way, the flange is located below the drain strainer, making it difficult for users to see the flange. This improves the design of the drain plug, and eliminates the need to position the drain pipe from below when attaching it to the washbasin. Furthermore, this drain plug is easy to maintain, improving the workability of maintenance work.

[0008] A second invention is a drain plug according to the first invention, characterized in that the flange portion is supported by a step portion provided on the drain portion.

[0009] With this drain plug, the flange is supported (hooked) on the step, and the drain pipe is attached (positioned) to the drain. This allows the worker to attach the drain pipe to the washbasin more easily and stably, and also makes it easier to position the drain pipe. Furthermore, the drain plug can be easily attached and detached when performing maintenance work.

[0010] A third invention is a drain plug characterized in that, in the first invention, the tubular portion has an attachment portion for attaching the drain strainer, and the drain strainer is pressed into the attachment portion.

[0011] According to this drain plug, the drain strainer is pressed into the attachment portion of the drain pipe, so that the drain strainer can be easily attached and detached to the drain pipe. The worker can remove only the drain strainer to perform maintenance. This can be used in either case, whether it is desired to remove the drain strainer and the drain pipe itself for maintenance, or to remove only the drain strainer for maintenance, and the worker can select the maintenance method during cleaning, making maintenance easier. In addition, since the drain strainer is pressed into the attachment portion, the drain strainer cannot be easily removed from the drain pipe by hand, which has the effect of preventing theft. In addition, the worker performing maintenance can easily remove the drain strainer from the drain pipe by using ordinary tools such as needle-nose pliers without using special tools.

[0012] A fourth invention is a drain plug characterized in that, in the first invention, the outer peripheral surface of the drain strainer contacts the inner peripheral surface of the drain section when the drain pipe is attached to the drain section, and the drain strainer has a drain hole.

[0013] If there is a gap between the drain strainer and the drainage section, for example, a thin metal fitting may be inserted into the gap and the drain strainer may be removed from the drainage section using the principle of leverage, resulting in the theft of the drain strainer. Also, if there is a gap between the drain strainer and the drainage section, the drain strainer may become loose due to the flow of water. With this drain plug, the outer peripheral surface of the drain strainer is in contact with the inner peripheral surface of the drainage section, which prevents the drain strainer from being stolen and also prevents the drain strainer from becoming loose. Also, the drain plug can ensure drainage performance by using a drain hole.

[0014] A fifth invention is a drain plug according to the second invention, further comprising a fixing device for fixing the drain pipe to the washbasin, the fixing device being inserted into the tubular portion protruding from below the drain section.

[0015] With this drain plug, the drain pipe can be fixed to the washbasin from below using a fixing device. In this case, the drain pipe is supported (positioned) at the step. Therefore, the only work the worker needs to do from below the washbasin is to attach the fixing device to the cylindrical portion. In other words, the positioning of the drain pipe, which requires the worker's effort, is done by supporting the flange portion on the step from above the washbasin. With the drain pipe positioned, the worker only needs to fix the drain pipe from below the washbasin using the fixing device. This makes it easier for the worker to fix the drain pipe.

[0016] A sixth invention is the drain plug of the second invention, characterized in that a sealant is provided between the flange portion and the step portion.

[0017] This drain plug can prevent water from leaking from the drain of the wash basin. Effect of the Invention

[0018] According to an aspect of the present invention, a drain plug is provided that improves the ease of maintenance work. [Brief description of the drawings]

[0019] [Figure 1] 1 is a perspective view of a washbasin unit equipped with a drain plug according to an embodiment, viewed from above. [Diagram 2] A plan view showing the drainage portion of a washbasin equipped with a drain plug according to an embodiment. [Diagram 3] 3 is a cross-sectional view of the washbasin and drain plug in FIG. 2 as viewed from the direction of arrow AA. [Figure 4] An exploded view showing the drain strainer removed from the drain pipe. [Diagram 5] FIG. [Figure 6] Side view of the drain plug. [Figure 7] FIG. [Figure 8]8 is a cross-sectional view of the drain plug in FIG. 7 as viewed from the direction of arrow BB. [Figure 9] FIG. 4 is a perspective view showing a state in which a drain plug is attached to the drain portion. [Figure 10] FIG. 2 is an exploded perspective view showing the washbasin with the drain plug removed. [Figure 11] An explanatory diagram illustrating the installation process for attaching the drain plug to the washbasin. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the size ratio between parts, etc. are not necessarily the same as those in reality. Even when the same part is shown, the dimensions and ratios of each part may be different depending on the drawing. In this specification and each drawing, elements similar to those described above with reference to the previous drawings are given the same reference numerals and detailed descriptions thereof will be omitted as appropriate.

[0021] FIG. 1 is a perspective view of a washbasin unit 10 equipped with a drain plug according to an embodiment of the present invention, viewed from above. As shown in Fig. 1, the washbasin unit 10 has a washbasin 21, a water spout 30, and a counter 40. The counter 40 has a counter surface 40a. The counter surface 40a is flat, and the washbasin 21, which is curved downward, is integrally formed on the counter surface 40a. The counter surface 40a is also provided with a water spout 30.

[0022] In this specification, the front side from the perspective of a user facing the washbasin 21 will be referred to as the "front," the back side will be referred to as the "rear," the upper side will be referred to as the "upper," the lower side will be referred to as the "lower," the right side will be referred to as the "right side," and the left side will be referred to as the "left side."

[0023] In washbasin 21, bottom 213 is formed at the tip portion of the downwardly curved shape. Bottom 213 is provided with drainage section 214. Drainage section 214 has a through hole that passes through bottom 213 in the up-down direction. Drainage section 214 is formed, for example, in a cylindrical shape. The upper end of drainage section 214 serves as a drain port for draining water from within washbasin 21. Drainage section 214 is provided with drain plug 100, which will be described later.

[0024] The washbasin 21 has a step portion 214b, which will be described later. More specifically, the step portion 214b is formed in the drain portion 214 of the washbasin 21.

[0025] The water spout 30 is provided in the vicinity of the washbasin 21 in the washbasin unit 10. In this embodiment, the water spout 30 in the washbasin unit 10 is provided to the right of the washbasin 21 and behind it.

[0026] The water spout 30 has a water discharge shaft 31, a water discharge section 32, and a water volume adjustment section 33. The water discharge shaft 31 is cylindrical and stands on the counter surface 40a. The water discharge section 32 is rod-shaped and protrudes from the circumferential surface of the water discharge shaft 31 to the upper side of the washbasin 21. A water discharge surface 32a is provided at the tip of the water discharge section 32. A water volume adjustment section 33 is provided on the water discharge shaft 31. The water volume adjustment section 33 has a rod-shaped protrusion 33a that protrudes outward. In this embodiment, by rotating the protrusion 33a, water flows inside the water discharge shaft 31 and the water discharge section 32, and is discharged from the water discharge surface 32a into the washbasin 21.

[0027] The water discharged from the water spout 30 is drained through a drain plug 100 provided in the drain section 214 of the bottom 213. In this example, the user can wash their hands, etc., by using the water discharged from the water spout 30. The soap and water used to wash the hands, etc. are drained from the drain plug 100. Note that in this specification, the term "water" includes not only cold water but also heated hot water.

[0028] FIG. 2 is a plan view showing the drain portion 214 of a washbasin 21 equipped with a drain plug 100. FIG. 3 is a cross-sectional view of the washbasin 21 and the drain plug 100 in FIG. 2 as viewed from the direction of the arrow AA. FIG. 4 is an exploded view showing the drainage pipe 110 with the drainage screen 120 removed.

[0029] 2 and 3, the drain plug 100 includes a drain pipe 110, a drain screen 120, and a U-packing (sealing material) 130. The drain plug 100 may also include a nut (fixing device) 140, a triangular packing 150, and a connecting member 160. The drain plug 100 may further include an O-ring 170, which will be described later.

[0030] The drain pipe 110 has a tubular portion 111 and a flange portion 112. When the tubular portion 111 is inserted into the drainage portion 214, the flange portion 112 is located inside the drainage portion 214 and protrudes outward from the tubular portion 111. The flange portion 112 has a donut shape when viewed from above. The flange portion 112 is located, for example, on the upper end side of the tubular portion 111 and protrudes outward from the tubular portion 111. The flange portion 112 is provided below the drainage strainer 120.

[0031] Drainage portion 214 has a step portion 214b. Step portion 214b is provided continuously in the circumferential direction on the inner peripheral surface of drainage portion 214. As shown in FIG. 3, drainage portion 214 has an inner diameter that differs between upper and lower positions due to step portion 214b. The inner diameter of drainage portion 214 is smaller below step portion 214b than above step portion 214b. A flange portion 112 of drain plug 100 described later abuts against this step portion 214b.

[0032] The flange portion 112 is supported by a step portion 214b provided in the drainage portion 214. More specifically, the flange portion 112 is supported by the step portion 214b via the U-packing 130. The step portion 214b is a design surface, and this design surface contacts the U-packing 130. Therefore, the step portion 214b, which is processed as a design surface, can be effectively used to support the flange portion 112. As a comparative example, when considering a case where the flange portion is attached from below the washbasin via a packing, the design surface of the washbasin cannot be used, so additional processing is required to attach the flange portion. In this embodiment, such additional processing can be eliminated.

[0033] The tubular portion 111 is inserted into the inside of the washbasin 21, in other words, into the drainage portion 214. As shown in FIG. 3, the lower end side of the tubular portion 111 protrudes from the drainage portion 214 with the flange portion 112 supported by the step portion 214b of the drainage portion 214. The tubular portion 111 has an attachment portion 113 for attaching the drainage strainer 120. Details of the attachment portion 113 will be described later. The drainage strainer 120 is attached to the attachment portion 113 of the drain pipe 110. The outer peripheral surface 120a of the drainage strainer 120 contacts the inner peripheral surface 214a of the drainage portion 214. Specifically, the drainage strainer 120 contacts the inner peripheral surface above the step portion 214b. As a result, the drainage strainer 120 is located inside the drainage portion 214 when attached to the attachment portion 113.

[0034] As shown in FIG. 3, the drain strainer 120 has a disk-shaped portion 121 and a shaft portion 122 extending downward from the disk-shaped portion 121. The shaft portion 122 is attached to an attachment portion 113 of the tubular portion 111. Details of the shaft portion 122 will be described later. The disk-shaped portion 121 of the drain strainer 120 has a plurality of drain holes 121a. In this example, the plurality of drain holes 121a are circular in top view. The plurality of drain holes 121a are provided in an annular shape and in a double layer, penetrating the drain strainer 120 in the thickness direction.

[0035] The U-packing 130 is provided between the flange portion 112 and the step portion 214b. The U-packing 130 is disposed along the circumferential surface of the cylindrical portion 111 so as to open radially outward.

[0036] Triangular packing 150 is disposed so as to follow the periphery of tube portion 111 and so as to have inclined surface 150a facing upward. In triangular packing 150, inclined surface 150a is in contact with the lower surface of washbasin 21.

[0037] The nut 140 is provided on the lower side of the triangular packing 150. The nut 140 fixes the tubular portion 111 to the washbasin 21. A male thread (not shown) is provided on the outer peripheral surface of the tubular portion 111. By tightening the nut 140, the triangular packing 150 is sandwiched between the lower surface of the washbasin 21 and the nut 140, and the drain plug 100 is fixed to the washbasin 21. In addition, by tightening the nut 140, the flange portion 112 is lowered, and the U-packing 130 can be elastically deformed between the flange portion 112 and the step portion 214b of the drain portion 214. As a result, the drain pipe 110 is fixed to the washbasin 21. The drain pipe 110 may be fixed not by using the nut 140, but by using, for example, a tailpiece.

[0038] Connection member 160 is provided on the underside of tube portion 111 so as to follow the circumferential surface of tube portion 111. Connection member 160 connects a pipe (drain trap) (not shown) to drain pipe 110. Water discharged into washbasin 21 is drained from drain plug 100 through the pipe to the sewer system.

[0039] As shown in Fig. 4, the drain strainer 120 is detachable from the drain pipe 110. More specifically, as shown by arrow A1, the shaft portion 122 of the drain strainer 120 can be attached from above to an attachment portion 113 provided on the tubular portion 111 of the drain pipe 110. The drain strainer 120 attached in this manner can be removed upward from the drain pipe 110. Details of the detachable configuration will be described later.

[0040] FIG. 5 is a perspective view showing the drain plug 100. FIG. 6 is a side view of the drain plug 100. FIG. 7 is a plan view of the drain plug 100 seen from above. FIG. 8 is a cross-sectional view of the drain plug 100 in FIG. 7 as viewed from the direction of arrow BB.

[0041] As shown in FIGS. 5 to 7, a drain strainer 120 is disposed above the flange portion 112 of the drain plug 100.

[0042] As shown in FIG. 8, the mounting portion 113 is provided on the upper surface of the tubular portion 111, in other words, on the drain strainer 120 side. The mounting portion 113 is, for example, integrally molded with the tubular portion 111. The mounting portion 113 has a cylindrical central portion 113a extending in the vertical direction, and four extension portions 113b each extending in a cross direction outward from the central portion 113a in a top view. In this example, the central portion 113a is cylindrical and has a hole portion 113c. The central portion 113a is provided on the central axis C1 of the tubular portion 111.

[0043] 8, the drainage strainer 120 has a disk-shaped portion 121 and a shaft portion 122. The above-mentioned multiple drainage holes 121a are provided in the disk-shaped portion 121. The shaft portion 122 has a connection portion 122a and a convex portion 122b.

[0044] The connection portion 122a connects the disk-shaped portion 121 and the convex portion 122b. When the drainage strainer 120 is attached to the mounting portion 113, the connection portion 122a and the convex portion 122b are located on the central axis C1. The convex portion 122b is provided at the tip of the connection portion 122a. The convex portion 122b has a shape corresponding to the hole portion 113c of the mounting portion 113. In this example, the convex portion 122b is cylindrical. The diameter of the convex portion 122b is smaller than the inner diameter of the hole portion 113c. In other words, the convex portion 122b can be inserted into the hole portion 113c of the mounting portion 113.

[0045] An elastic O-ring 170 is attached to the convex portion 122b. The O-ring 170 is attached to the outer peripheral surface of the convex portion 122b. The width of the O-ring 170 is slightly larger than the gap between the convex portion 122b and the hole 113c of the mounting portion 113. As a result, when the convex portion 122b is inserted into the hole 113c, the O-ring 170 fills the gap while elastically deforming. In other words, the drain strainer 120 is attached to the drain pipe 110 by pressing the convex portion 122b into the mounting portion 113. For this reason, the drain strainer 120 cannot be easily removed from the drain pipe 110.

[0046] In this embodiment, the convex portion 122b of the drain strainer 120 is press-fitted into the hole 113c of the drain pipe 110, but this is not limited to the above. For example, the convex portion 122b may be inserted into the hole 113c of the mounting portion 113 without attaching the O-ring 170 to the convex portion 122b. Also, the drain strainer 120 may not be provided with an axis portion 122, but may be placed along the peripheral surface of the drain portion 214. This can improve the ease of attachment and detachment of the drain strainer 120.

[0047] Next, the installation of the drain plug 100 to the drain portion 214 of the washbasin 21 will be described.

[0048] FIG. 9 is a perspective view showing the drain plug 100 attached to the drain portion 214. As shown in FIG. FIG. 10 is an exploded perspective view showing the washbasin 21 with the drain plug 100 removed. FIG. 11 is an explanatory diagram illustrating the installation process for installing the drain plug 100 to the washbasin 21.

[0049] First, O-ring 170 is attached to convex portion 122b of drain strainer 120, and then drain strainer 120 is press-fitted into hole 113c of mounting portion 113 of drain pipe 110. Next, U-packing 130 is inserted from below drain pipe 110 to the underside of flange portion 112. This completes the drain plug 100 shown in Figures 5 to 8.

[0050] In this state, the drain plug 100 is inserted from above into the drain portion 214 of the washbasin 21. Note that the drain strainer 120 may be press-fitted into the drain pipe 110 after the drain pipe 110 is inserted into the washbasin 21.

[0051] After inserting drain plug 100 from above into drain portion 214 in this manner, as shown in Fig. 11, triangular gasket 150 is inserted from below tubular portion 111 of drain pipe 110 until inclined surface 150a comes into contact with the lower portion of washbasin 21. Next, nut 140 is inserted from below triangular gasket 150 and screwed into the male thread of tubular portion 111, thereby tightening triangular gasket 150. Thus, drain plug 100 is fixed to washbasin 21.

[0052] Next, the connecting member 160 is inserted into the cylindrical portion 111, and the drain pipe 110 is connected to a pipe (a drain trap) (not shown) by the connecting member 160. In this way, the drain plug 100 is installed in the washbasin 21.

[0053] It is better if the washbasin 21 is made of resin. If the washbasin 21 is made of ceramic, there is a possibility that there will be variation in the dimensional error of the step portion 214b. For this reason, when the flange portion 112 of the drain pipe 110 is supported by the step portion 214b, there is a possibility that the drain plug 100 will become loose. On the other hand, by making the washbasin 21 from resin, it is possible to reduce the variation in the dimensional error of the step portion 214b. Therefore, it is possible to more stably attach the drain pipe 110 to the washbasin 21, and the workability of the installation work can be improved.

[0054] As described above, the drain plug 100 includes the drain pipe 110 attached to the drain section 214, and the drain strainer 120. The drain pipe 110 has a tubular portion 111 inserted into the inside of the drain section 214, and a flange portion 112 that is located inside the drain section 214 when the tubular portion 111 is inserted into the inside of the drain section 214 and protrudes outward from the tubular portion 111. The flange portion 112 is provided below the drain strainer 120.

[0055] With this drain plug 100, the drain pipe 110 can be attached to the washbasin 21 from above the washbasin 21. Furthermore, in the washbasin 21 to which the drain pipe 110 is attached in this manner, the flange portion 112 is located downstream of the drain strainer 120, so that, for example, as shown in FIG. 1, the flange portion 112 is difficult for the user to see. This improves the design of the drain plug 100, and eliminates the need to position the drain pipe 110 from below when attaching it to the washbasin 21. Furthermore, this drain plug 100 is easy to maintain, and can improve the workability of maintenance work.

[0056] Furthermore, the flange portion 112 is supported by a step portion 214 b provided in the drainage portion 214 .

[0057] According to this drain plug 100, the flange portion 112 is supported (hooked) on the step portion 214b, and thus the drain pipe 110 is attached (positioned) to the drain portion 214. This allows the worker to more easily and stably attach the drain pipe 110 to the washbasin 21, and also makes it easier to position the drain pipe 110. Furthermore, the drain plug 100 can be easily attached and detached when performing maintenance work.

[0058] Furthermore, in the drain plug 100, the tubular portion 111 has an attachment portion 113 for attaching the drain strainer 120, and the drain strainer 120 is press-fitted into the attachment portion 113.

[0059] According to this drain plug 100, the drain strainer 120 can be easily attached and detached to the drain pipe 110 by being pressed into the mounting portion 113 of the drain pipe 110. The worker can remove only the drain strainer 120 to perform maintenance. It is possible to handle both cases, whether it is desired to remove the drain strainer 120 and the drain pipe 110 themselves to perform maintenance, or to remove only the drain strainer 120 to perform maintenance, and the worker can select the maintenance method during cleaning, making maintenance easier. In addition, since the drain strainer 120 is pressed into the hole portion 113c provided in the mounting portion 113, the drain strainer 120 cannot be easily removed from the drain pipe 110 by hand, which has the effect of preventing theft. In addition, the worker performing maintenance can remove the drain strainer 120 from the drain pipe 110 by using a general tool such as radio pliers without using special tools.

[0060] Furthermore, in the drain plug 100, the outer peripheral surface 120a of the drain strainer 120 contacts the inner peripheral surface 214a of the drain portion 214 when the drain pipe 110 is attached to the drain portion 214, and the drain strainer 120 has a plurality of drain holes 121a.

[0061] If there is a gap between the drain strainer 120 and the drainage section 214, for example, a thin metal fitting may be inserted into the gap and the drain strainer 120 may be removed from the drainage section 214 using the principle of leverage, resulting in the theft of the drain strainer 120. Also, if there is a gap between the drain strainer 120 and the drainage section 214, the drain strainer 120 may become loose due to the flow of water. According to this drain plug 100, the outer peripheral surface of the drain strainer 120 is in contact with the inner peripheral surface of the drainage section 214, so that the drain strainer 120 can be prevented from being stolen and the drain strainer 120 can also be prevented from becoming loose. Also, the drain plug 100 can ensure drainage performance by the drain hole 121a.

[0062] Furthermore, the drain plug 100 further includes a nut 140 for fixing the drain pipe 110 to the washbasin 21, and the nut 140 is inserted into a tube portion 111 protruding from below the drain portion 214.

[0063] According to this drain plug 100, the drain pipe 110 can be fixed to the washbasin 21 from below the washbasin 21 with the nut 140. In this case, the drain pipe 110 is supported (positioned) at the step portion 214b. Therefore, the only work that the worker needs to do from below the washbasin 21 is to attach the nut 140 to the tube portion 111. In other words, the positioning of the drain pipe 110, which requires the worker's effort, is performed by supporting the flange portion 112 on the step portion 214b from above the washbasin 21. With the drain pipe 110 positioned, the worker only needs to fix the drain pipe 110 from below the washbasin 21 with the nut 140. This makes it easier for the worker to fix the drain pipe 110.

[0064] Furthermore, in drain plug 100, U-packing 130 is provided between flange portion 112 and step portion 214b.

[0065] This drain plug 100 can prevent water from leaking from the drain portion 214 of the washbasin 21. The drain plug 100 is further provided with a triangular gasket 150 so as to contact the underside of the washbasin 21. The triangular gasket 150 allows the drain plug 100 to further prevent water from leaking from the drain portion 214.

[0066] The embodiments include the following aspects.

[0067] (Appendix 1) A drain plug disposed in a drain provided at the bottom of a wash basin, A drain pipe attached to the drain section, and Equipped with a drainage screen, The drain pipe is A tube portion that is inserted into the drainage portion; a flange portion that is located inside the drainage portion when the tubular portion is inserted into the drainage portion and that protrudes outward from the tubular portion, A drain plug characterized in that the flange portion is located below the drain strainer.

[0068] (Appendix 2) The drain plug described in Appendix 1, characterized in that the flange portion is supported by a step portion provided in the drain portion.

[0069] (Appendix 3) The cylindrical portion has an attachment portion for attaching the drainage screen, The drain plug described in Appendix 1 or 2, characterized in that the drain strainer is pressed into the mounting portion.

[0070] (Appendix 4) The outer peripheral surface of the drainage screen is in contact with the inner peripheral surface of the drainage section when the drain pipe is attached to the drainage section, 4. The drain plug according to claim 1, wherein the drain plate has a drain hole.

[0071] (Appendix 5) A fixture for fixing the drain pipe to the wash basin is further provided, 5. The drain plug according to any one of claims 2 to 4, wherein the fixing device is inserted into the tubular portion protruding from below the drain portion.

[0072] (Appendix 6) 6. The drain plug according to any one of claims 2 to 5, wherein a sealant is provided between the flange portion and the step portion. [Explanation of symbols]

[0073] 10...Washbasin unit, 21...Washbasin bowl, 30...Water spout, 31...Water spout shaft, 32...Water spout part, 32a...Water spout surface, 33...Water volume adjustment part, 33a...Convex part, 40...Counter, 40a...Counter surface, 100...Drain plug, 110...Drain pipe, 111...Cylinder part, 112...Flange part, 113...Mounting part, 113a...Center part, 113b...Extension part, 113c...Hole part, 120...Drain strainer, 120a...Outer surface, 121...Disc-shaped part, 1 21a...drainage hole, 122...shaft portion, 122a...connection portion, 122b...convex portion, 130...U-packing, 140...nut, 150...triangular packing, 150a...inclined surface, 160...connection member, 170...O-ring, 211...wall portion, 211a...wall surface, 212...bowl portion, 212b...bowl surface, 212c...bowl surface, 212d...bowl surface, 213...bottom, 214...drainage portion, 214a...inner peripheral surface, 214b...step portion, C1...central axis

Claims

1. A drain plug disposed in a drain provided at the bottom of a wash basin, A drain pipe attached to the drain section, and Equipped with a drainage screen, The drain pipe is A tube portion that is inserted into the drainage portion; a flange portion that is located inside the drainage portion when the tubular portion is inserted into the drainage portion and that protrudes outward from the tubular portion, A drain plug characterized in that the flange portion is located below the drain strainer.

2. The drain plug according to claim 1 , wherein the flange portion is supported by a step portion provided in the drain portion.

3. The cylindrical portion has an attachment portion for attaching the drainage screen, The drain plug according to claim 1, wherein the drain strainer is press-fitted into the mounting portion.

4. The outer peripheral surface of the drainage screen is in contact with the inner peripheral surface of the drainage section when the drain pipe is attached to the drainage section, The drain plug according to claim 1, wherein the drain plate has a drain hole.

5. A fixture for fixing the drain pipe to the wash basin is further provided, The drain plug according to claim 2 , wherein the fastener is inserted into the tubular portion protruding from below the drain portion.

6. 3. The drain plug according to claim 2, wherein a sealant is provided between the flange portion and the step portion.

Images