Drainage device

Abstract

To provide a drainage device that can improve cut-off performance between a piping body and a connection member.SOLUTION: A drainage device 2 comprises: a tubular piping body 16 that has a flat surface 36 formed on a part of an outer peripheral surface thereof and a through hole 38 in the flat surface 36; a tubular connection member 20 that is detachably connected to the flat surface 36 of the piping body 16 so that an interior of the connection member communicates with an interior of the piping body 16 through the through hole 38; and a sealing member 22 that seals between the connection member 20 and the flat surface 36 of the piping body 16.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a drainage device for draining water from a tank such as a sink in a kitchen or a washbowl.

Background Art

[0002] For example, a drainage device for draining water from a tank such as a sink in a kitchen or a washbowl is known. As one such drainage device, Patent Document 1 discloses a drainage device including a cylindrical pipe body and an annular nut member. An annular flange portion protruding radially outward of the pipe body is formed at the peripheral edge of the upper opening of the pipe body. A male screw portion is formed on the outer peripheral surface at the upper end portion of the pipe body. Further, a female screw portion is formed on the inner peripheral surface of the nut member.

[0003] When installing the drainage device disclosed in Patent Document 1 in a tank, first, the pipe body is inserted upward through a drainage port formed at the bottom of the tank, and the flange portion of the pipe body is brought into contact with the peripheral edge of the drainage port from above. Next, the nut member is passed through from below outside the pipe body, and the nut member is rotated in a predetermined direction with respect to the pipe body to fasten the female screw portion of the nut member and the male screw portion of the pipe body. Thereby, the nut member comes into contact with the peripheral edge of the drainage port from below, and the peripheral edge of the drainage port is sandwiched between the flange portion of the pipe body and the nut member.

[0004] Further, among the above-described drainage devices, there is a type in which a branch pipe protruding radially outward of the pipe body is formed on the outer peripheral surface of the pipe body. When installing such a type of drainage device in a tank, when the nut member is passed through from below outside the pipe body, the nut member and the branch pipe may interfere with each other, and there is a possibility that the female screw portion of the nut member and the male screw portion of the pipe body cannot be fastened.

[0005] To avoid interference between such nut members and branch pipes, Patent Document 2 discloses a drainage device in which the main pipe and branch pipe are configured as separate components. In the drainage device disclosed in Patent Document 2, the branch pipe is detachably connected to the outer surface of the main pipe, and an annular sealing member is interposed between the branch pipe and the outer surface of the main pipe. When installing the drainage device in a tank, with the branch pipe detached from the outer surface of the main pipe, the nut member is passed from below on the outside of the main pipe, and the female threaded portion of the nut member is fastened to the male threaded portion of the main pipe. After that, the branch pipe is connected to the outer surface of the main pipe. This avoids interference between the nut member and the branch pipe. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Publication No. 6-9094 [Patent Document 2] Japanese Patent Publication No. 2020-41574 [Overview of the project] [Problems that the invention aims to solve]

[0007] However, in the drainage device disclosed in Patent Document 2, since the pipe body is formed in a cylindrical shape, it is difficult to reliably press the sealing member against the curved outer surface of the pipe body over its entire circumference. As a result, there is a problem that the watertightness between the branch pipe and the outer surface of the pipe body may decrease.

[0008] The present invention aims to solve the above-mentioned problems, and its objective is to provide a drainage device that can improve watertightness between the pipe body and the connecting member. [Means for solving the problem]

[0009] A drainage device according to one aspect of the present invention comprises a cylindrical pipe body having a flat surface formed on a part of its outer surface and a through hole in the flat surface; a cylindrical connecting member detachably connected to the flat surface of the pipe body such that its interior communicates with the interior of the pipe body through the through hole; and a sealing member that seals the space between the connecting member and the flat surface of the pipe body. [Effects of the Invention]

[0010] According to one aspect of the present invention, a drainage device can improve watertightness between the pipe body and the connecting member. [Brief explanation of the drawing]

[0011] [Figure 1] This figure shows an example of the application of the drainage device according to Embodiment 1. [Figure 2] This is a perspective view showing a drainage device according to Embodiment 1. [Figure 3] This is a side view showing a drainage device according to Embodiment 1. [Figure 4A] Figure 3 is a cross-sectional view of the drainage device according to Embodiment 1, along the IVA-IVA line. [Figure 4B] Figure 4A is a cross-sectional view of the drainage device according to Embodiment 1, along the line IVB-IVB. [Figure 5] This is an exploded perspective view showing a drainage device according to Embodiment 1. [Figure 6] This is a perspective view showing the connecting member and sealing member of the drainage device according to Embodiment 1. [Figure 7] This is a perspective view showing the connecting member and sealing member of the drainage device according to Embodiment 1, viewed from a different angle than Figure 6. [Figure 8] This is a diagram illustrating the installation procedure for the drainage device according to Embodiment 1. [Figure 9] This is a diagram illustrating the installation procedure for the drainage device according to Embodiment 1. [Figure 10] This is a diagram illustrating the installation procedure for the drainage device according to Embodiment 1. [Figure 11]It is a diagram showing an application example of the drainage device according to Embodiment 2. [Figure 12] It is a perspective view showing the drainage device according to Embodiment 2. [Figure 13] It is a diagram showing an application example of the drainage device according to Embodiment 3.

Mode for Carrying Out the Invention

[0012] The drainage device according to the first aspect of the present invention includes a cylindrical pipe body having a flat surface formed on a part of its outer peripheral surface and having a through hole in the flat surface, and a cylindrical connecting member detachably connected to the flat surface of the pipe body so that its interior communicates with the interior of the pipe body through the through hole, and a sealing member for sealing between the connecting member and the flat surface of the pipe body.

[0013] According to this aspect, a flat surface is formed on a part of the outer peripheral surface of the pipe body, and the sealing member seals between the connecting member and the flat surface of the pipe body. Thereby, the sealing member can be surely pressed against the flat surface of the pipe body over its entire circumference, and the water stoppage between the connecting member and the flat surface of the pipe body can be improved.

[0014] Further, in the drainage device according to the second aspect of the present invention, in the first aspect, an annular flange portion protruding radially outward of the connecting member is formed on the outer peripheral surface of the connecting member, and the sealing member may be formed in an annular shape and configured to seal between the flange portion and the flat surface of the pipe body.

[0015] According to this aspect, the flange portion of the connecting member can surely and easily press the sealing member against the flat surface of the pipe body over its entire circumference. <00​​Furthermore, in a drainage device according to a third aspect of the present invention, in the first or second aspect, a notch is formed on the periphery of the through hole of the pipe body, and a projection is formed on one end of the connecting member that protrudes radially outward from the connecting member, and the projecting projection is inserted into the inside of the pipe body through the notch, and the connecting member is rotated in a first direction relative to the pipe body so that the projection engages with the inner circumferential surface of the pipe body.

[0017] According to this embodiment, by rotating the connecting member in a first direction relative to the pipe body, the projection engages with the inner circumferential surface of the pipe body, so that the connecting member can be easily connected to the flat surface of the pipe body.

[0018] Furthermore, in the drainage device according to the fourth aspect of the present invention, in the third aspect, an inclined surface is formed on the inner circumferential surface of the pipe body, and when the connecting member is rotated in the first direction relative to the pipe body with respect to the pipe body while the projection is inserted into the interior of the pipe body through the notch, the projection rides up onto the inclined surface, thereby engaging with the inclined surface.

[0019] According to this embodiment, when the protrusion rides up onto the inclined surface, the connecting member is retracted into the interior of the pipe body by a predetermined distance through the through hole. Consequently, the sealing member can be compressed between the flange portion of the connecting member and the flat surface of the pipe body, allowing the sealing member to be reliably and easily pressed against the flat surface of the pipe body around its entire circumference.

[0020] Furthermore, in a drainage device according to a fifth aspect of the present invention, in the third or fourth aspect, an engaging portion is formed on the flat surface of the pipe body, projecting radially outward from the pipe body, and an engaged portion is formed on the outer circumference of the flange portion of the connecting member, projecting radially outward from the connecting member. When the connecting member is rotated in the first direction relative to the pipe body with respect to the pipe body while the projection is inserted through the notch into the interior of the pipe body, the engaged portion overcomes the engaging portion, thereby restricting rotation of the connecting member in a second direction opposite to the first direction relative to the pipe body.

[0021] According to this embodiment, the rotation of the connecting member in the second direction relative to the pipe body is restricted by the engaged portion overcoming the engaging portion, so that the state in which the projection is engaged with the inner circumferential surface (including the inclined surface) of the pipe body can be maintained.

[0022] The embodiments will be described in detail below with reference to the drawings.

[0023] The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, arrangement and connection configurations of components, steps, and the order of steps shown in the following embodiments are examples only and are not intended to limit the present invention. Furthermore, among the components in the following embodiments, those not described in the independent claim representing the highest-level concept will be described as optional components.

[0024] (Embodiment 1) [1. Examples of Drainage System Applications] First, an example of the application of the drainage device 2 according to Embodiment 1 will be described with reference to Figure 1. Figure 1 is a diagram showing an example of the application of the drainage device 2 according to Embodiment 1.

[0025] As shown in Figure 1, in this embodiment, the drainage device 2 is used as a drain trap for draining wastewater from a multi-compartment sink 4 installed, for example, in a kitchen. The multi-compartment sink 4 comprises a first compartment 6 and a second compartment 8 adjacent to each other.

[0026] A circular first drain outlet 10 is formed at the bottom of the first tank body 6. A drainage device 2 is installed in this first drain outlet 10. Drainage from the first tank body 6 flows through the first drain outlet 10 and down into the drainage device 2.

[0027] Furthermore, a circular second drain outlet 12 is formed at the bottom of the second tank body 8. A branch pipe 14 extending in a roughly L-shape is installed at this second drain outlet 12. One end of the branch pipe 14 is connected to the second drain outlet 12, and the other end of the branch pipe 14 is connected to the side of the drainage device 2. The drainage from the second tank body 8 flows laterally through the branch pipe 14 via the second drain outlet 12, then flows into the drainage device 2 and flows down inside the drainage device 2.

[0028] [2. Configuration of the drainage system] Next, the configuration of the drainage device 2 according to Embodiment 1 will be described with reference to Figures 2 to 7. Figure 2 is a perspective view showing the drainage device 2 according to Embodiment 1. Figure 3 is a side view showing the drainage device 2 according to Embodiment 1. Figure 4A is a cross-sectional view of the drainage device 2 according to Embodiment 1, taken along the line IVA-IVA in Figure 3. Figure 4B is a cross-sectional view of the drainage device 2 according to Embodiment 1, taken along the line IVB-IVB in Figure 4A. Figure 5 is an exploded perspective view showing the drainage device 2 according to Embodiment 1. Figure 6 is a perspective view showing the connecting member 20 and sealing member 22 of the drainage device 2 according to Embodiment 1. Figure 7 is a perspective view showing the connecting member 20 and sealing member 22 of the drainage device 2 according to Embodiment 1, viewed from a different angle than in Figure 6.

[0029] In Figures 2 to 5, the axial direction of the connecting member 20 is defined as the X-axis direction, the axial direction of the pipe body 16 is defined as the Z-axis direction, and the direction perpendicular to the axial directions of the connecting member 20 and the pipe body 16 is defined as the Y-axis direction. Furthermore, the positive side of the Z-axis direction is expressed as "up," "upper side," and "upward," etc., and the negative side of the Z-axis direction is expressed as "down," "downward side," and "downward," etc.

[0030] As shown in Figures 2 to 5, the drainage device 2 comprises a pipe body 16, a nut member 18, a connecting member 20, and a sealing member 22.

[0031] The piping body 16 has a first main body portion 24, a flange portion 26, a second main body portion 28, and a water seal forming portion 30.

[0032] The first main body portion 24 is formed in a cylindrical shape. A male threaded portion 32 is formed on the outer circumferential surface at the upper end of the first main body portion 24. The male threaded portion 32 is formed around the entire circumference of the first main body portion 24. Furthermore, as shown in Figures 2 and 4A, the outer circumferential surface of the first main body portion 24 has a cylindrically curved surface 34 and a flat surface 36. That is, the flat surface 36 is formed on a part of the outer circumferential surface of the first main body portion 24. The flat surface 36 is a plane perpendicular to the connection direction (X-axis direction) of the connecting member 20 and extends along the axial direction (Z-axis direction) of the first main body portion 24.

[0033] As shown in Figure 5, a substantially circular through-hole 38 is formed in the flat surface 36. A pair of notches 40 and 42 are formed on the periphery of the through-hole 38. The pair of notches 40 and 42 are positioned on opposite sides of the diameter center of the through-hole 38.

[0034] Furthermore, as shown in Figure 5, an engaging portion 44 is formed on the flat surface 36, protruding radially outward from the first main body portion 24. The engaging portion 44 is formed, for example, in a triangular cross-section and is located near the through hole 38.

[0035] As shown in Figures 9(a) and 9(b) described later, an inclined surface 46 is formed on the inner circumferential surface of the first main body portion 24. The inclined surface 46 is located near the through hole 38 and is formed to slope upward from the inner circumferential surface of the first main body portion 24 as it moves away from the through hole 38.

[0036] The flange portion 26 protrudes in an annular shape radially outward from the peripheral edge of the upper opening of the first main body portion 24. The male screw portion 32 described above is formed on the outer circumferential surface of the first main body portion 24 below the flange portion 26.

[0037] The second main body portion 28 is formed in a cylindrical shape and extends downward from the lower end of the first main body portion 24. The outer diameter of the second main body portion 28 is smaller than the outer diameter of the first main body portion 24. A drain pipe (not shown) is detachably connected to the second main body portion 28.

[0038] As shown in Figure 4B, the water seal forming section 30 includes a water seal cylinder 48 and a bowl 50. The water seal cylinder 48 is formed in a cylindrical shape and is located inside the first main body 24. The water seal cylinder 48 extends upward from the lower end of the first main body 24, and the inside of the water seal cylinder 48 is in communication with the insides of the first main body 24 and the second main body 28. The bowl 50 is positioned so as to cover the water seal cylinder 48 from above. Due to these water seal cylinders 48 and bowl 50, water seal 52 accumulates inside the first main body 24. This water seal 52 suppresses the backflow of odors and the intrusion of insects from the drain pipe connected to the second main body 28 to the first drain outlet 10 (see Figure 1).

[0039] As shown in Figure 2, the nut member 18 has a nut body portion 54, a flange portion 56, and a plurality of rib pieces 58. The nut body portion 54 is formed in an annular shape, and a female thread portion 60 is formed on the inner circumferential surface of the nut body portion 54. The female thread portion 60 is formed around the entire circumference of the nut body portion 54 in the circumferential direction. The flange portion 56 protrudes annularly from the peripheral edge of the upper opening of the nut body portion 54 radially outward. The plurality of rib pieces 58 are formed on the outer circumferential surface of the nut body portion 54 and are arranged at equal intervals along the circumferential direction of the nut body portion 54.

[0040] As shown in Figures 2 to 5, the connecting member 20 is detachably connected to the flat surface 36 of the pipe body 16 such that its interior (hollow) communicates with the interior (hollow) of the pipe body 16 through a through hole 38. A branch pipe 14 (see Figure 1) is detachably connected to the connecting member 20. In other words, in this embodiment, the connecting member 20 is used as a branch pipe to combine the drainage from the branch pipe 14 with the drainage flowing through the pipe body 16. As shown in Figures 6 and 7, the connecting member 20 has a connecting body portion 62, a pair of protrusions 64 and 66, a flange portion 68, and an engaging portion 70.

[0041] The connecting body portion 62 is formed in a cylindrical shape, and the inside of the connecting body portion 62 communicates with the inside of the pipe body 16 through a through hole 38. The outer diameter of the connecting body portion 62 is, for example, about 1 mm smaller than the outer diameter of the through hole 38 of the pipe body 16. Each of the pair of protrusions 64 and 66 projects radially outward from the outer circumferential surface of the connecting body portion 62 at one end (the end closer to the pipe body 16). The pair of protrusions 64 and 66 are positioned on opposite sides of the diameter center of the connecting body portion 62. The flange portion 68 projects annularly outward from the outer circumferential surface near one end of the connecting body portion 62. The flange portion 68 is positioned on the other end of the connecting body portion 62 (the end further from the pipe body 16) in the axial direction of the connecting body portion 62 than the pair of protrusions 64 and 66. The engaged portion 70 protrudes in a substantially L-shape radially outward from the outer circumference of the flange portion 68 towards the connecting body portion 62.

[0042] The sealing member 22 is an annularly shaped sealing member and is made of a material with elastic restorative force, such as rubber. Specifically, the sealing member 22 is made of a packing such as an O-ring. As shown in Figures 5 to 7, the sealing member 22 is arranged along the circumferential direction of the side surface of the flange portion 68 of the connecting member 20 (the side surface closer to the pair of protrusions 64 and 66). As shown in Figures 4A and 4B, when the connecting member 20 is connected to the flat surface 36 of the pipe body 16, the sealing member 22 is compressed between the flange portion 68 of the connecting member 20 and the flat surface 36 of the pipe body 16, thereby sealing (stopping water) the space between the flange portion 68 of the connecting member 20 and the flat surface 36 of the pipe body 16.

[0043] [3. Installation Procedure for Drainage System] Next, the installation procedure for the drainage device 2 according to Embodiment 1 will be described with reference to Figures 8 to 10. Figures 8 to 10 are diagrams illustrating the installation procedure for the drainage device 2 according to Embodiment 1.

[0044] First, as shown in Figure 8(a), with the connecting member 20 removed from the flat surface 36 of the pipe body 16, the first main body portion 24 of the pipe body 16 is inserted from above into the first drain port 10 of the first tank body 6, and the flange portion 26 of the pipe body 16 is brought into contact with the periphery of the first drain port 10 from above. At this time, the orientation of the flat surface 36 of the pipe body 16 is adjusted so that the flat surface 36 of the pipe body 16 faces the installation direction of the branch pipe 14 (see Figure 1).

[0045] Next, as shown in Figures 8(a) and 8(b), the nut member 18 is passed from the lower end of the second main body 28 to the outside of the first main body 24, bringing the nut member 18 closer to the upper end of the first main body 24. At this time, since the connecting member 20 is removed from the flat surface 36 of the pipe body 16, interference between the nut member 18 and the connecting member 20 can be avoided. Next, the nut member 18 is rotated in a predetermined direction relative to the first main body 24 to fasten the female threaded portion 60 of the nut member 18 (see Figure 2) to the male threaded portion 32 of the first main body 24. Note that the nut member 18 can be easily rotated relative to the first main body 24 by hooking your fingers onto the rib piece 58 of the nut member 18.

[0046] By fastening the female threaded portion 60 of the nut member 18 to the male threaded portion 32 of the first main body portion 24 in this manner, the flange portion 56 of the nut member 18 comes into contact with the periphery of the first drain port 10 from below. As a result, as shown in Figure 8(b), the periphery of the first drain port 10 is sandwiched from above and below between the flange portion 26 of the pipe body 16 and the flange portion 56 of the nut member 18, and the pipe body 16 is fixed to the first drain port 10. For the sake of explanation, the nut member 18 is not shown in Figures 9 and 10.

[0047] Next, as shown in Figures 9(a) and 10(a), the pair of protrusions 64 and 66 of the connecting member 20 are inserted into the interior of the first main body 24 of the pipe body 16 through the pair of notches 40 and 42 of the first main body 24. As a result, one end of the connecting main body 62 of the connecting member 20 is inserted into the interior of the first main body 24 through the through hole 38. At this time, the sealing member 22 positioned on the flange portion 68 of the connecting member 20 comes into contact with the peripheral edge of the through hole 38 on the flat surface 36 of the first main body 24.

[0048] In this state, as shown in Figure 9(b), the connecting body portion 62 of the connecting member 20 is rotated in a first direction (the direction indicated by arrow P in Figure 9(b)) relative to the first body portion 24 of the pipe body 16. As a result, each of the pair of protrusions 64 and 66 engages with the peripheral edge of the through hole 38 on the inner circumferential surface of the first body portion 24. At this time, the protrusion 66 rides up onto the inclined surface 46 formed on the inner circumferential surface of the first body portion 24, thereby engaging with the inclined surface 46. Consequently, the connecting body portion 62 of the connecting member 20 is pulled in into the first body portion 24 by a predetermined distance (for example, about 1 to 2 mm) through the through hole 38. As a result, the sealing member 22 is compressed and sandwiched between the flange portion 68 of the connecting member 20 and the flat surface 36 of the pipe body 16, thereby sealing the space between the flange portion 68 of the connecting member 20 and the flat surface 36 of the pipe body 16.

[0049] Furthermore, when the connecting body portion 62 of the connecting member 20 is rotated in the first direction (the direction indicated by arrow P in Figure 10(b)) relative to the first body portion 24 of the pipe body 16, as shown in Figure 10(b), the engaged portion 70 will move over the engaging portion 44. As a result, rotation of the connecting member 20 in the second direction (the direction indicated by arrow Q in Figure 10(b)), which is the opposite direction to the first direction relative to the pipe body 16, is restricted, and the protrusion 66 of the connecting member 20 can be maintained engaged with the inclined surface 46 of the pipe body 16.

[0050] In this manner, the connecting member 20 is connected to the flat surface 36 of the pipe body 16, and the installation of the drainage device 2 on the first tank body 6 is completed.

[0051] [4. Effects] As described above, in this embodiment, the sealing member 22 seals the space between the flange portion 68 of the connecting member 20 and the flat surface 36 of the pipe body 16. This ensures that the sealing member 22 is pressed firmly against the flat surface 36 of the pipe body 16 around its entire circumference, thereby improving the watertightness between the flange portion 68 of the connecting member 20 and the flat surface 36 of the pipe body 16.

[0052] In this embodiment, the drainage device 2 is used as a drain trap for draining wastewater from a multi-basin sink 4, but it is not limited to this. For example, it may also be used as a drain trap for draining wastewater from a washbasin (basin) installed in a bathroom. In this case, the connecting member 20 is used as a branch pipe to combine the wastewater from the overflow pipe connected to the overflow opening of the washbasin with the wastewater flowing through the main pipe 16.

[0053] (Embodiment 2) An example of the application of the drainage device 2A according to Embodiment 2 will be described with reference to Figure 11. Figure 11 is a diagram showing an example of the application of the drainage device 2A according to Embodiment 2. In each of the embodiments described below, the same reference numerals are used for components that are the same as those in Embodiment 1, and their descriptions are omitted.

[0054] As shown in Figure 11, in this embodiment, the drainage device 2A is used as a drainer for draining wastewater from a basin 72, which is a sink installed in a kitchen, for example. A circular drain opening 73 is formed at the bottom of the basin 72. The drainage device 2A is installed in this drain opening 73.

[0055] A straight drain pipe 78 is connected to the connecting member 20 of the drainage device 2A via a roughly L-shaped drain pipe 74 and a roughly S-shaped trap pipe 76. In other words, in this embodiment, the connecting member 20 is used as a branch pipe to direct the drainage from the main piping body 16A laterally toward the drain pipe 74.

[0056] The wastewater from the tank 72 flows into the drainage device 2A through the drain outlet 73, and then flows laterally through the drain pipe 74. The wastewater that has flowed through the drain pipe 74 flows into the drain pipe 78 via the trap pipe 76. By connecting the drain pipe 74 to the side of the drainage device 2A in this way, storage space for a kitchen or other area can be secured below the tank 72.

[0057] The configuration of the drainage device 2A according to Embodiment 2 will be described with reference to Figure 12. Figure 12 is a perspective view showing the drainage device 2A according to Embodiment 2.

[0058] As shown in Figure 12, in this embodiment, the configuration of the piping body 16A of the drainage device 2A differs from that of Embodiment 1. Specifically, the piping body 16A has only a first body portion 24A and a flange portion 26, and does not have the second body portion 28 and water seal forming portion 30 described in Embodiment 1. The first body portion 24A is formed in a bottomed cylindrical shape with an open upper end and a closed lower end.

[0059] Therefore, the same effects as in Embodiment 1 can be obtained in this embodiment as well.

[0060] (Embodiment 3) An example of the application of the drainage device 2B according to Embodiment 3 will be described with reference to Figure 13. Figure 13 is a diagram showing an example of the application of the drainage device 2B according to Embodiment 3.

[0061] As shown in Figure 13, in this embodiment, the drainage device 2B is used as a drainer for draining water from a basin 80, which is a washbasin installed in a bathroom, for example. A circular drain opening 82 is formed at the bottom of the basin 80. The drainage device 2B is installed in this drain opening 82. A drain plug 84 is also provided at the drain opening 82 so as to be openable and closable. The drain plug 84 is connected to an operating unit 86 located at the upper end of the basin 80 via an interlocking mechanism 88.

[0062] The interlocking mechanism 88 links the raising and lowering movement of the operating unit 86 with the opening and closing movement of the drain plug 84. Specifically, when the user pulls the operating unit 86 upward relative to the tank body 80, the interlocking mechanism 88 opens the drain plug 84 in conjunction with the upward movement of the operating unit 86. This opens the drain port 82 through the drain plug 84. Conversely, when the user pushes the operating unit 86 downward relative to the tank body 80, the interlocking mechanism 88 closes the drain plug 84 in conjunction with the downward movement of the operating unit 86. This closes the drain port 82 through the drain plug 84.

[0063] A portion of the interlocking mechanism 88 is located inside both the piping body 16B and the connecting member 20B of the drainage device 2B. In other words, in this embodiment, the connecting member 20B is used as a mounting structure for connecting the piping body 16B and the operating unit 86 via the interlocking mechanism 88.

[0064] Although detailed illustrations are omitted, the piping body 16B has the same configuration as the piping body 16 described in Embodiment 1 above. Therefore, the same effects as in Embodiment 1 can be obtained in this embodiment as well. Although not shown in the illustrations, the drainage device 2B can be used not only as the drainer described above, but also, for example, as a drain trap for draining wastewater from the tank body 80.

[0065] (Variations, etc.) Although drainage devices according to one or more embodiments have been described above based on the above embodiments, the present invention is not limited to the above embodiments. Without departing from the spirit of the present invention, various modifications that a person skilled in the art can conceive of may be applied to the above embodiments, or forms constructed by combining components from different embodiments may also be included within the scope of one or more embodiments. [Industrial applicability]

[0066] The drainage device according to the present invention can be applied, for example, to a drain trap for draining wastewater from a multi-compartment sink installed in a kitchen or the like. [Explanation of symbols]

[0067] 2,2A,2B Drainage device 4. Multi-compartment sink 6. First tank 8. Second tank 10. First drain 12. Second drain 14 Branch piping 16, 16A, 16B Piping Body 18 Nut component 20,20B Connecting Member 22 sealing member 24,24A First main body 26, 56, 68 Flange section 28 Second main body 30 Water seal formation part 32 Male threaded section 34 Curved surface 36 Flat surface 38 Through holes 40, 42 Notches 44 Engagement part 46 Slope 48 Water seal cylinder 50 bowls 52 Sealing 54 Nut body 58 Rib pieces 60 Female thread section 62 Connection main unit 64, 66 Protrusions 70 Engaged portion 72,80 Tank body 73,82 Drain port 74,78 Drain pipe 76 Trap pipe 84 Drain plug 86 Control section 88 Interlocking mechanism

Claims

1. A cylindrical pipe body having a flat surface formed on a part of its outer surface and a through hole in the flat surface, A cylindrical connecting member is detachably connected to the flat surface of the pipe body such that its interior communicates with the interior of the pipe body through the through hole, The system includes a sealing member that seals the space between the connecting member and the flat surface of the piping body, An annular flange portion is formed on the outer circumferential surface of the connecting member, projecting radially outward from the connecting member. The sealing member is formed in an annular shape and seals the space between the flange portion and the flat surface of the pipe body. A notch is formed at the periphery of the through hole in the pipe body. One end of the connecting member has a projection that protrudes radially outward from the connecting member. With the projection inserted through the notch into the interior of the pipe body, the connecting member is rotated in a first direction relative to the pipe body, thereby engaging the projection with the inner circumferential surface of the pipe body. Drainage equipment.

2. The inner circumferential surface of the pipe body is formed with an inclined surface. When the connecting member is rotated in the first direction relative to the pipe body with respect to the pipe body while the projection is inserted through the notch into the interior of the pipe body, the projection rides up onto the inclined surface, thereby engaging with the inclined surface. The drainage device according to claim 1.

3. An engaging portion is formed on the flat surface of the pipe body, which protrudes radially outward from the pipe body. The outer circumference of the flange portion of the connecting member has an engaging portion that protrudes radially outward from the connecting member. When the connecting member is rotated in the first direction relative to the pipe body with the projection inserted through the notch, the engaged portion overcomes the engaging portion, thereby restricting the rotation of the connecting member in the second direction, which is opposite to the first direction relative to the pipe body. The drainage device according to claim 1 or 2.

Images