Drainage material

Abstract

To provide a drainage member attached to a tank body, that eliminates a step that occurs between a flange part of a drain plug and a recess part of the tank body, and can prevent a positional deviation of an annular packing used for construction.SOLUTION: In a drainage member formed of: a tank body having a mounting hole; a drain plug having a flange part protruding toward the outside of a peripheral edge, and attached to the mounting hole by locking the flange part to a peripheral edge of the mounting hole; and an annular packing arranged between the peripheral edge of the mounting hole of the tank body and the flange part of the drain plug to form a watertight state, a shape of the annular packing is such that a convex part is provided on upper and lower surfaces of the annular packing in a direction of a central axis in the cross-sectional view, and a thin part having a thinned thickness of an outer edge of the annular packing is formed.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a drain member for attaching a drain plug of a tank body to the tank body in a watertight manner.

[0002] In order to treat wastewater generated during use in a tank body such as a washbasin, the tank body is piped using drainage members such as pipes, and the wastewater generated within the tank body is discharged into the sewer. Here, a member called a drain plug is known as a piping member that is directly attached to the tank body. The drain plug has a generally cylindrical tubular body with a flange extending outward from the upper end thereof, and a male thread provided on the lower outer surface of the flange. The tank body to which the drain plug is attached is a box body with an open top, and has an attachment hole for attaching the drain plug on its bottom surface, and a recessed portion for placing the flange portion around the attachment hole. The drain plug also includes a plate nut member with a female thread that screws onto the male thread of the drain plug, and an annular packing for providing a watertight connection between the recessed portion and the flange upon completion of installation. When attaching a drain plug to a mounting hole in a tank body, a ring-shaped gasket made of an elastic material such as rubber and having a rectangular cross section is placed in a recess around the mounting hole, and the underside of the drain plug's flange abuts against the upper surface of the recess via the ring-shaped gasket. That is, the ring-shaped gasket is placed between the recess and the flange. In this state, the female threads of the plate nut member are threaded onto the male threads of the drain plug, so that the flange and the plate nut member clamp the periphery of the mounting hole, allowing the drain plug to be attached to the mounting hole in the tank body. Furthermore, by placing and abutting the ring-shaped gasket between the underside of the flange and the upper surface of the mounting hole, the tank body and the drain plug are connected watertight, preventing water leakage. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-168973 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, in order to ensure aesthetic appeal, proposals have been made to reduce the thickness of the flange, particularly the thickness of the outer diameter portion, of the drain plugs mentioned above. However, with the conventional annular packings with rectangular cross sections shown in Figures 11 and 12, when the annular packing is placed in the flange of the thinned drain plug and the recessed portion of the tank body, the thickness of the annular packing causes a step to form between the flange and the periphery of the mounting hole in the tank body, as shown in Figure 11.

[0005] SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a drain member that eliminates the step between the flange of the drain plug and the recess of the tank body and prevents the annular packing from shifting out of position. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention as set forth in claim 1 comprises a tank body having a mounting hole; It has a flange that protrudes outward from the periphery, The aforementioned a drain plug that is attached to the mounting hole by having a flange portion engaged with a periphery of the mounting hole; The tank body The aforementioned The periphery of the mounting hole and the drain plug The aforementioned Tsubabe no Ma only A drainage member consisting of an annular packing arranged on the drainage member and forming a watertight state, The annular packing, in cross-sectional view, The aforementioned Convex portions are provided on the upper and lower surfaces of the annular packing in the central axis direction, a recessed portion for accommodating the flange portion is provided on the periphery of the mounting hole; The outer edge of the annular packing is made thinner to form a thin-walled portion. , the outer diameter is approximately the same as the inner diameter of the recessed portion and the inner diameter is approximately the same as the outer diameter of the drain plug, The flange portion is thinner toward the outer edge, and the annular packing is configured such that the lower surface of the flange portion of the drain plug abuts against the upper surface of the annular packing, and the upper surface of the mounting hole periphery abuts against the lower surface of the annular packing. The drainage member is characterized by the above.

[0007] The present invention as set forth in claim 2 is 2. The drainage member according to claim 1, wherein the annular packing has a diamond-shaped cross section. is.

[0008] The present invention as set forth in claim 3 is a tank body having mounting holes; a drain plug including a flange portion that protrudes outward from a periphery thereof, the flange portion being engaged with the periphery of the mounting hole, thereby being attached to the mounting hole; A drain member comprising an annular packing disposed between the periphery of the mounting hole of the tank body and the flange of the drain plug to form a watertight state, a recessed portion for accommodating the flange portion is provided on the periphery of the mounting hole; In a cross-sectional view of the annular packing, convex portions are provided on upper and lower surfaces of the annular packing in the central axis direction, The thickness of the outer edge of the annular packing is reduced, The cross section has a cross-shaped configuration with a thin-walled portion whose outer diameter is approximately the same as the inner diameter of the recessed portion and whose inner diameter is approximately the same as the outer diameter of the drain plug, The drain member is characterized in that the lower surface of the flange of the drain plug abuts against the upper surface of the annular packing, and the upper surface of the mounting hole periphery abuts against the lower surface of the annular packing. is.

[0009] The present invention as set forth in claim 4 is In the drainage member, 4. The drainage member according to claim 1, wherein the annular packing has a plane-symmetrical shape with respect to a plane perpendicular to a central axis when no stress is applied to the annular packing. is. [Effects of the Invention]

[0012] According to the above-mentioned drain member, when the flange of the drain plug is made thin, the annular gasket does not shift out of position when attached to the tank body, and a step does not form between the flange of the drain plug and the annular gasket. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 2 is a cross-sectional view showing the construction of the drainage member of the first embodiment. [Figure 2] FIG. 2 is an enlarged view of part A in FIG. [Figure 3] FIG. 3 is a reference diagram showing the component configuration of the drainage member of the first embodiment. [Figure 4] FIG. 10 is a reference diagram showing the state of the drainage member of the first embodiment during construction. [Figure 5] 10 is a cross-sectional view showing the installation state of a drainage member using an annular packing having a cross-shaped cross section. FIG. [Figure 6] FIG. 6 is an enlarged view of part B in FIG. 5. [Figure 7] FIG. 6 is a reference diagram showing the component configuration of the drainage member of FIG. 5. [Figure 8] 10 is a cross-sectional view showing the installation state of a drainage member using an annular packing with a triangular cross section. FIG. [Figure 9] 9 is a reference diagram showing the component configuration of the drainage member of the embodiment of FIG. 8. [Figure 10] This is a reference diagram showing the use of the annular gasket of the present invention as a drainage member for an overflow drain outlet. [Figure 11] FIG. 10 is a cross-sectional view showing the installation state of a conventional drainage member. [Figure 12] FIG. 12 is a reference diagram showing the component configuration of the drainage member of the conventional example in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] A drainage member according to a first embodiment of the present invention will be described below with reference to the drawings. Note that the following description is provided to facilitate understanding of the embodiment, and is not intended to limit the scope of the present invention.

[0015] As shown in FIGS. 1 to 4, the drainage member of the present invention comprises a tank body 1, a drain plug 2, an annular packing 3, a plate nut member 4, and a piping pipe (not shown).

[0016] The tank body 1 is a tank body 1 such as a bathtub placed in a bathroom or a washbowl placed in a washroom, and has a box shape with an open top, and a mounting hole 1a on the bottom, which is an opening portion to which a drain plug 2 is attached, The mounting hole 1a has a recess 1b around its periphery for receiving the flange 2a of the drain plug 2, which will be described later. The recess 1b is a recessed portion that protrudes downward from the bottom surface of the tank body with a mortar-like shape and sloped sides, and a locking portion 1c is provided in the inner diameter direction from the lower end of the protruding portion, with the mounting hole 1a formed in the center of the locking portion 1c.

[0017] As shown in Figures 1 to 4, the drain plug 2 is a cylindrical tube having a flange 2a that protrudes outward from the upper end of the tube along the periphery. The tank also has a drainage section 2b therein through which the wastewater flowing in from the tank body 1 is discharged. Further, a male screw 2c is provided on the outer surface of the cylindrical portion, that is, on the outer surface below the flange portion 2a. In this embodiment, in order to improve the design, the flange portion 2a is configured so that its thickness decreases toward the outer edge. The drain plug 2 is attached to the tank body 1 with the flange portion 2a housed in the recess portion 1b of the tank body 1 when installation is completed.

[0018] The annular packing 3 is an elastic member made of rubber or the like in a circular ring shape, and has a generally diamond-shaped cross section as shown in FIGS. The diamond-shaped cross section has convex portions 3a above and below the central axis, and thin-walled portions 3d at the outer edge 3b and inner edge 3c where the thickness of the annular packing 3 is reduced. When no stress is applied to the annular packing 3, as shown in Figure 3, the convex portions 3a of the annular packing 3 are formed in a plane-symmetrical shape with respect to a plane perpendicular to the central axis as the center. The central axis of the annular packing 3 is defined as the vertical axis when the annular packing 3 is placed on the bottom surface, and the horizontal axis when the annular packing 3 is placed on the side surface. In addition, the outer diameter of the annular gasket 3 is slightly smaller than the inner diameter of the recessed portion 1b but is almost the same as the inner diameter of the recessed portion 1b, and the inner diameter of the annular gasket 3 is slightly larger than the outer diameter of the drain plug 2 but is almost the same as the outer diameter of the drain plug 2. When installation is complete, the annular packing 3 is placed between the upper peripheral surface of the mounting hole 1a of the tank body 1 and the lower surface of the flange portion 2a of the drain plug 2, creating a watertight condition.

[0019] The plate nut member 4 is a nut member having an internal female thread 4a that screws onto the male thread 2c of the drain plug 2. When installation is complete, the plate nut member 4 screws onto the male thread 2c of the drain plug 2, and the underside of the flange and the upper surface of the nut member clamp the periphery of the mounting hole 1a, thereby attaching the drain plug 2 to the mounting hole 1a.

[0020] The method for installing the drainage member will be described below. First, the annular packing 3 is placed around the cylindrical portion of the drain plug 2 and below the flange portion 2a. Next, the cylindrical portion of drain plug 2 is inserted into mounting hole 1a from above. As mentioned above, the outer diameter of annular gasket 3 is slightly smaller than the inner diameter of recessed portion 1b but is almost the same, and the inner diameter of annular gasket 3 is slightly larger than the outer diameter of drain plug 2 but is almost the same. For this reason, as shown in Figure 4, the outer surface of the annular gasket contacts the inner surface of recessed portion 1b, and the inner surface of the annular gasket 3 contacts the outer surface of drain plug 2, preventing the annular gasket 3 from moving. Therefore, the annular gasket 3 will not shift position during installation, and the mounting hole 1a, annular gasket 3, and flange portion 2a of drain plug 2 will maintain a concentric state, which is a proper installation state when viewed from above. Further, the drain plug 2 is inserted downward so that the underside of the flange of the drain plug 2 abuts against the upper surface of the annular gasket 3 and the upper surface of the locking portion 1c around the mounting hole 1a abuts against the lower surface of the annular gasket 3. Even in this state, no positional deviation occurs, and therefore the mounting hole 1a, the annular packing 3, and the flange portion 2a of the drain plug 2 maintain a concentric state in plan view. Furthermore, the plate nut member 4 is inserted into the drain plug 2 from below the tank body 1, and the female threads 4a of the plate nut member 4 are screwed onto the male threads 2c of the drain plug 2. As the screwing progresses, the upper surface of the plate nut member 4 abuts against the lower periphery of the mounting hole 1a, and by further tightening, the flange 2a of the drain plug 2 and the plate nut member 4 clamp the periphery of the mounting hole 1a, as shown in Figure 1, completing the attachment of the drain plug 2 to the tank body 1. At this time, as described above, the annular packing 3 is configured so as not to shift position, and therefore the mounting hole 1a, the annular packing 3, and the flange 2a of the drain plug 2 remain concentric in plan view. If the annular gasket 3 is installed in a position that is different from the appropriate position during installation, the watertight contact between the drain plug 2 and the tank body 1 will be incomplete, which may result in water leakage.However, in the present invention, the mounting hole 1a, the annular gasket 3, and the flange 2a of the drain plug 2 are installed in a concentric state when viewed from above, which is the appropriate installation state, so no water leakage will occur. Furthermore, in this proper installed state, the upper convex portion 3a of the annular packing 3 abuts against the underside of the flange portion 2a over its entire circumference, and the lower convex portion 3a abuts against the upper surface of the locking portion 1c around the mounting hole 1a over its entire circumference, and the upper and lower convex portions 3a are firmly abutted together by screwing in the plate nut member 4, thereby achieving a watertight connection and preventing water leakage. In particular, in the present invention, the abutting portion is a convex portion 3a in cross section and is linear in plan view, so that abutment occurs along a line rather than a surface, and the abutment stress is concentrated on this linear portion, ensuring reliable watertightness. In this embodiment, the outer edge 3b of the annular packing 3 is thinned to a thin portion 3d. For design purposes, the present invention thins the outer edge of the flange 2a so that it nearly contacts the inner surface of the recess 1b of the tank body, as shown in Figures 1 and 2. This narrows the gap at the intersection of the flange 2a and the recess 1b. While a conventional annular packing 3 with a rectangular cross section would result in a step, as shown in Figures 11 and 12, the annular packing 3 of this embodiment has a thinned outer edge 3d at the outer edge 3b. Therefore, the outer edge does not interfere with the flange 2a or the recess 1b, eliminating the step and allowing for aesthetically pleasing installation. Furthermore, by connecting the drain plug 2 to a pipe or other piping below the drain plug 2 (not shown) to a sewer pipe, the installation of the drain plug 2 to the tank body 1 is completed.

[0021] Next, the flow of wastewater when the tank body is used will be described. When the tank body 1 is in use and wastewater is generated inside the tank body 1, the wastewater passes through the drain plug 2 from the drain part 2b on the bottom of the tank body 1, passes through the inside of the drain plug 2, and is discharged to the sewer side. At this time, as described above, the upper convex part 3a of the annular packing 3 and the underside of the flange part 2a, and the lower convex part 3a and the upper surface of the recessed part 1b are abutting in a manner that concentrates strong stress on the linear parts, so that no water leakage or other watertight failure occurs between the drain plug 2 and the tank body 1.

[0022] In the above embodiment, when no stress is applied to the annular packing 3, the annular packing 3 is configured to have a plane-symmetrical shape centered on a plane perpendicular to the central axis, as shown in Fig. 3. Therefore, when installing, there is no risk of inserting the annular packing 3 in the wrong direction, i.e., making a mistake in insertion. Note that the diamond-shaped annular packing 3 shown in Figs. 1 and 2 is not plane-symmetrical about a plane perpendicular to the central axis, but this is the result of elastic deformation of the plane-symmetrical shape caused by the application of stress during installation.

[0023] Although the embodiments of the present invention have been described above, the present invention is not limited to the shapes of the above-described embodiments, and various design modifications may be made without departing from the spirit of the invention. For example, the shape of the annular packing 3 may be a cross-shaped cross section, as shown in Figures 5 to 7, as long as it has convex portions 3a on the upper and lower surfaces in cross section and the outer diameter end (outer edge 3b) is thin-walled. Even with this cross-shaped configuration, the upper and lower surfaces of the annular packing 3 each have a convex portion 3a in cross section, so the upper convex portion 3a linearly abuts against the underside of the flange 2a of the drain plug 2, and the lower convex portion 3a linearly abuts against the recess 1b and the locking portion 1c around the mounting hole 1a of the tank body 1, thereby providing high watertightness. Furthermore, by configuring the inner diameter side to be approximately the same diameter as the outer diameter of the cylindrical portion of drain plug 2 and the outer diameter side to be approximately the same diameter as the inner surface of recessed portion 1b, it can be positioned to be concentric with drain plug 2 and mounting hole 1a, eliminating the problem of annular gasket 3 becoming misaligned and causing water leakage. Also, the inner diameter end (inner edge 3c) and outer diameter end (outer edge 3b) of annular gasket 3 are thin-walled, and the outer diameter end (outer edge 3b) does not interfere with flange portion 2a or recessed portion 1b when installation is complete, so installation can be carried out with good design without creating steps as in conventional examples. 8 and 9, the shape of the annular packing 3 may be a generally triangular shape in cross section with convex portions 3a on the upper and lower surfaces, with these convex portions 3a at the outer diameter side end. Even with this generally triangular shape, the upper and lower surfaces of the annular packing 3 each have a convex portion 3a in cross section, so the upper convex portion 3a comes into linear contact with the underside of the flange 2a of the drain plug 2, and the lower convex portion 3a comes into linear contact with the recess 1b and other locking portions 1c around the mounting hole 1a of the tank body 1, resulting in high watertightness. Furthermore, since there is no annular gasket 3 on the outer edge of the flange 2a where the flange 2a and the recess 1b intersect, no steps are created as in the conventional example, and construction can be carried out with good design. Furthermore, by configuring the inner diameter side to be approximately the same diameter as the outer diameter of the cylindrical portion of the drain plug 2, it can be positioned concentrically with the drain plug 2, and as long as the drain plug 2 and the mounting hole 1a are connected concentrically, there will be no problem with the annular gasket 3 becoming misaligned and causing water leakage. However, since the annular gasket 3 having a triangular cross section does not have the effect of positioning relative to the tank body 1, the annular gasket 3 having a diamond cross section as shown in Figures 1 to 4 and the annular gasket 3 having a cross section as shown in Figures 5 to 7 can be positioned more reliably. The annular packing 3 may be used not only on the bottom surface of the tank body 1 but also on a drain port on the side surface such as an overflow port 1d provided on the side surface of the tank body 1 near the upper edge, as shown in FIG. [Explanation of symbols]

[0024] 1 tank body 1a Mounting hole 1b Recessed part 1c Locking part 1d Overflow port 2 drain plugs 2a Tsuba 2b Drainage section 2c male thread 3 Annular packing 3a Convex part 3b outer edge 3c Inner edge 3d thin section 4 Plate nut member 4a female thread

Claims

1. a tank body having mounting holes; a drain plug including a flange portion that protrudes outward from a periphery thereof, the flange portion being engaged with the periphery of the mounting hole, thereby being attached to the mounting hole; A drain member consisting of an annular packing disposed only between the periphery of the mounting hole of the tank body and the flange of the drain plug to form a watertight state, The annular packing has convex portions on upper and lower surfaces of the annular packing in a central axis direction in a cross-sectional view, a recessed portion for accommodating the flange portion is provided on the periphery of the mounting hole; The thickness of the outer edge of the annular packing is reduced to form a thin-walled portion, and the outer diameter is approximately the same as the inner diameter of the recessed portion and the inner diameter is approximately the same as the outer diameter of the drain plug, A drainage member characterized in that the flange portion becomes thinner as it approaches the outer edge, and the annular gasket is characterized in that the lower surface of the flange portion of the drain plug abuts against the upper surface of the annular gasket, and the upper surface of the mounting hole periphery abuts against the lower surface of the annular gasket.

2. 2. The drainage member according to claim 1, wherein the annular packing has a diamond-shaped cross section.

3. A tank body having mounting holes; a drain plug including a flange portion that protrudes outward from a periphery thereof, the flange portion being engaged with the periphery of the mounting hole, thereby being attached to the mounting hole; A drain member comprising an annular packing disposed between the periphery of the mounting hole of the tank body and the flange of the drain plug to form a watertight state, a recessed portion for accommodating the flange portion is provided on the periphery of the mounting hole; In a cross-sectional view of the annular packing, convex portions are provided on upper and lower surfaces of the annular packing in the central axis direction, The thickness of the outer edge of the annular packing is reduced, The cross section has a cross-shaped configuration with a thin-walled portion whose outer diameter is approximately the same as the inner diameter of the recessed portion and whose inner diameter is approximately the same as the outer diameter of the drain plug, The drainage member is characterized in that the lower surface of the flange portion of the drain plug abuts against the upper surface of the annular gasket, and the upper surface of the mounting hole periphery abuts against the lower surface of the annular gasket.

4. In the drainage member, A drainage member as described in any one of claims 1 to 3, characterized in that when no stress is applied to the annular gasket, the annular gasket has a plane-symmetrical shape centered on a plane perpendicular to the central axis.

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