Socket pipe and drain socket

Abstract

To provide a technique that can prevent a positional deviation of a socket tube with respect to another socket tube.SOLUTION: The socket pipe used for a drain socket connecting a drain pipe 10 with floor drain specifications and a toilet bowl 16 comprises a main body tube 40 having a toilet bowl connection part 52 connected to the toilet bowl 16 and a vertical pipe part 48 extending in a vertical direction, wherein the vertical pipe part 48 comprises an irregular shape cross-sectional part 78 provided in at least a part of a range extending in a direction of a pipe axis, and a cut end part 92 provided in the irregular shape cross-sectional part 78 constitutes a pipe connecting part 56 that can be fitted to another socket pipe constituting the drain socket when the irregular shape cross-sectional part 78 is cut.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a drainage socket. [Background technology]

[0002] A toilet room is fitted with a drain pipe to discharge waste into the sewer system. This drain pipe is usually connected to the toilet bowl by a drain socket.

[0003] Patent Document 1 discloses an example of a drain socket. This drain socket comprises a socket pipe connected to a toilet bowl, and another socket pipe connected to a drain pipe. The socket pipe comprises a toilet bowl connection part connected to the toilet bowl, and a vertical pipe part extending in the vertical direction. The other socket pipe comprises a drain pipe connection part connected to the drain pipe, and a pipe receiving part into which the downstream end part of the vertical pipe part is fitted. The vertical pipe part of the socket pipe and the pipe receiving part of the other socket pipe are usually fixed by adhesive or the like. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-37789 A Summary of the Invention [Problem to be solved by the invention]

[0005] As a result of examining the technology disclosed in Patent Document 1, the inventor of the present application came to the following new realization. The vertical pipe portion of the socket pipe and the pipe receiving portion of the other socket pipe usually have a circular cross section. Therefore, when the socket pipe rotates around the central axis of the vertical pipe portion, the socket pipe may become misaligned with respect to the other socket pipe. If the socket pipe and the other socket pipe are fixed with this misalignment occurring, the drain socket may not be able to connect the toilet bowl and the drain pipe. The drain socket in Patent Document 1 was not devised from this perspective, and there was room for improvement.

[0006] One of the objects of the present disclosure is to provide a technique capable of preventing misalignment of a socket tube relative to other socket tubes. [Means for solving the problem]

[0007] The socket pipe of the present disclosure is a socket pipe used in a drain socket that connects a floor-drainage drain pipe to a toilet, and comprises a main pipe having a toilet connection portion connected to the toilet and a vertical pipe portion extending in the vertical direction, the vertical pipe portion having an irregular cross-sectional portion provided in at least a portion of the range extending in the pipe axial direction, and when the irregular cross-sectional portion is cut, the cut end portion provided on the irregular cross-sectional portion forms a pipe connection portion that can be fitted into another socket pipe that constitutes the drain socket.

[0008] Another socket pipe of the present disclosure is a socket pipe used in a drain socket that connects a floor-drainage drain pipe to a toilet, and comprises a main pipe having a toilet connection portion connected to the toilet and a vertical pipe portion extending in the vertical direction, the vertical pipe portion having an irregular cross-sectional portion provided in at least a portion of the range extending in the pipe axial direction, and the downstream end of the irregular cross-sectional portion forms a pipe connection portion that can be fitted into another socket pipe that constitutes the drain socket. [Brief description of the drawings]

[0009] [Figure 1] 1 is a side cross-sectional view of a toilet apparatus according to a first embodiment. [Diagram 2] This is a side cross-sectional view showing a double-pipe drain socket together with its surrounding structure. [Diagram 3] FIG. 4 is a side cross-sectional view of a first socket pipe of the first embodiment. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. [Diagram 5] FIG. 3 is a cross-sectional view of FIG. 2 . [Figure 6] 1A and 1B are explanatory diagrams of a dimensionally isotropic structure and a dimensionally anisotropic structure. [Figure 7] This is a side cross-sectional view showing a single-pipe drain socket together with its surrounding structure. [Figure 8]1 is an explanatory diagram of a first socket pipe of a first corresponding form and a first socket pipe of a second corresponding form. FIG. [Figure 9] FIG. 2 is an explanatory diagram relating to an orthogonal coordinate system. [Figure 10] FIG. 11 is a side cross-sectional view showing a part of a toilet apparatus according to a second embodiment. [Figure 11] FIG. 11 is a side view of a first socket tube of the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment will be described. The same components are given the same reference numerals, and duplicated explanations will be omitted. In each drawing, for the sake of convenience, components are omitted, enlarged, or reduced as appropriate. The drawings should be viewed according to the orientation of the reference numerals.

[0011] (First embodiment) See Fig. 1. Below, the positional relationship of each component will be described using three mutually perpendicular directions. These directions are the front-rear direction A, the left-right direction B, and the up-down direction C. When the toilet is installed in a toilet room, ideally, the front-rear direction A and the left-right direction are horizontal, and the up-down direction C is vertical. The front-rear direction A and the left-right direction B correspond to the front-rear direction, front-rear direction, and left-right direction of a user sitting in a normal position on a toilet seat (not shown) mounted on the toilet.

[0012] A drain pipe 10 is installed in a building. The drain pipe 10 of this embodiment is a floor drain specification installed on the floor F of a toilet room. The drain center La of the drain pipe 10 varies depending on the site. The drain center La refers to the distance in the front-to-rear direction A from the wall W of the toilet room to the opening center of the upstream end opening 10a of the drain pipe 10.

[0013] The toilet device 14 in which the drain socket 12 is used comprises a toilet 16 in addition to the drain socket 12 .

[0014] The toilet bowl 16 of this embodiment is made of ceramic. There are no particular limitations on the material of the toilet bowl 16, and it may be made of, for example, resin, metal, etc. The toilet bowl 16 includes a toilet bowl 18 for receiving waste, and a toilet drainage channel 20 connected to the bottom of the toilet bowl 18.

[0015] The toilet drainage channel 20 serves as a passageway for waste discharged from the toilet bowl 18. The toilet drainage channel 20 includes a cylindrical connected part 22 provided at the downstream end of the toilet drainage channel 20, and a water seal reservoir 24 capable of storing water seal W. The connected part 22 in this embodiment extends linearly rearward as it approaches the downstream side. The water seal W blocks the flow of gas in the flow direction within the toilet drainage channel 20.

[0016] The toilet device 14 of this embodiment includes an outer peripheral wall 26 provided on the outer peripheral side of the toilet bowl 18, and a cavity 28 formed inside the outer peripheral wall 26. The outer peripheral wall 26 of this embodiment is provided on the toilet 16 as a part of the toilet 16. The cavity 28 includes a rear opening 28a that opens the cavity 28 rearward, and a lower opening 28b that opens the cavity 28 downward. The rear opening 28a and the lower opening 28b open on the outer peripheral wall 26. The rear opening 28a is continuous with the lower opening 28b so as to open downward. The drain socket 12 of this embodiment is disposed within the cavity 28 of the toilet device 14. The drain socket 12 can be inserted and removed from the cavity 28 through the openings 28a and 28b when the toilet 16 is moved.

[0017] Please refer to Fig. 2. The drain socket 12 can connect the floor drainage drain pipe 10 to the toilet drainage channel 20 of the toilet 16. The drain socket 12 includes a first socket pipe 30 connected to the toilet drainage channel 20 and a second socket pipe 32 connected to the drain pipe 10.

[0018] The drain socket 12 has a cylindrical drain pipe connection part 34 that is connected to the drain pipe 10. The drain pipe connection part 34 is configured by the downstream end part of the drain socket 12, and has a cylindrical shape that opens downward. The drain pipe connection part 34 is connected to the drain pipe 10 using any one of a plurality of predetermined connection methods. The connection method actually used is selected, for example, depending on the country in which the toilet 16 is installed. The plurality of connection methods include, for example, a flange method, a slip-in method (described later), etc.

[0019] In the flange method, the drain socket 12 is connected to the drain pipe 10 using a floor flange 36. In this embodiment, this flange method is described. The floor flange 36 is disposed on the floor F at the periphery of the upstream end opening 10a of the drain pipe 10. The floor flange 36 is fixed to the floor F using bolts or the like.

[0020] The flange-type drain pipe connection part 34 includes a socket side flange part 34a protruding from its outer circumferential surface. The socket side flange part 34a is provided so as to cover the peripheral part of the drain pipe 10 from above. The flange-type drain pipe connection part 34 is connected to the drain pipe 10 by fixing the socket side flange part 34a to the floor flange 36 via bolts (not shown).

[0021] The drain pipe connection portion 34 corresponding to the flange type is watertightly connected to the drain pipe 10 via a first seal member 38. The first seal member 38 is disposed between the socket side flange portion 34a and the floor flange 36, and provides a seal between them. The first seal member 38 corresponding to the flange type is an elastic member such as a gasket.

[0022] 2 to 4, the first socket pipe 30 includes a main pipe 40, a second seal member 42 attached to the main pipe 40, and a pressing member 44 that fixes the second seal member 42 to the main pipe 40. The second seal member 42 is an elastic member such as a rubber packing.

[0023] In this embodiment, the main tube 40 is made of a hard material. This hard material is, for example, a non-rubber resin, a metal, etc. Here, the non-rubber resin is, for example, polyvinyl chloride, ABS resin, polypropylene, etc.

[0024] A first internal water passage 45 is formed inside the main pipe 40, which serves as a passageway for waste discharged from the toilet bowl 16. Hereinafter, when describing the components of the first socket pipe 30, the upstream side and downstream side in the flow direction of the first internal water passage 45 will be used for description. The main pipe 40 comprises a front pipe section 46 provided on the upstream side of the main pipe 40, and a vertical pipe section 48 provided downstream of the front pipe section 46. The main pipe 40 of this embodiment also comprises a bolt fixing section 50 that is fixed to the wall section W of the toilet room by a bolt (not shown).

[0025] The main body pipe 40 has a cylindrical toilet connection part 52 that is connected to the connected part 22 of the toilet drainage channel 20. The toilet connection part 52 is formed by the upstream end of the front pipe part 46, i.e., the upstream end of the main body pipe 40. A part of the first internal water channel 45 is formed inside the toilet connection part 52. The toilet connection part 52 is watertightly connected to the toilet drainage channel 20 via the second seal member 42, with the connected part 22 of the toilet drainage channel 20 inserted inside it.

[0026] The front pipe portion 46 constitutes a first adjuster pipe portion 54 extending in the front-rear direction A. The first adjuster pipe portion 54 is generally linear. In this embodiment, the first adjuster pipe portion 54 extends forward from the upstream end portion of the vertical pipe portion 48. The length of the first adjuster pipe portion 54 in the pipe axis direction can be adjusted by cutting it. A plurality of protrusions 54a for hooking the second seal member 42 is formed on the outer circumferential surface of the first adjuster pipe portion 54. The plurality of protrusions 54a are formed at intervals in the pipe axis direction of the first adjuster pipe portion 54.

[0027] The vertical pipe section 48 extends in the up-down direction C and is generally linear. In this embodiment, the vertical pipe section 48 extends vertically downward toward the downstream side. The vertical pipe section 48 includes a pipe connection section 56 that is configured by the downstream end of the vertical pipe section 48 and is connected to the second socket pipe 32. The vertical pipe section 48 will be described in detail later.

[0028] The first socket pipe 30 has a first step portion 58 extending radially inward from each of the upper portion and the lateral portion at the downstream end of the front pipe portion 46. The vertical pipe portion 48 is continuous with the front pipe portion 46 via the first step portion 58.

[0029] A second internal water passage 60 is formed inside the second socket pipe 32, which serves as a passage for waste discharged from the toilet bowl 16. In the following, when describing the components of the second socket pipe 32, the upstream side and downstream side in the flow direction of the second internal water passage 60 will be used for description.

[0030] The second socket pipe 32 is provided as another socket pipe constituting the drain socket 12. In addition to the drain pipe connecting portion 34 described above, the second socket pipe 32 has a cylindrical pipe receiving portion 62 into which the pipe connecting portion 56 of the first socket pipe 30 is fitted.

[0031] The pipe receiving portion 62 is provided at the upstream end of the second socket pipe 32. A part of the second internal water passage 60 is formed inside the pipe receiving portion 62. The pipe connection portion 56 of the vertical pipe portion 48 is inserted into the pipe receiving portion 62 of this embodiment. The pipe receiving portion 62 includes a cylindrical peripheral wall portion 62a disposed on the outer periphery side of the vertical pipe portion 48, and a second step portion 62b against which the vertical pipe portion 48 abuts. The vertical pipe portion 48 and the pipe receiving portion 62 are fixed using an adhesive, a concave-convex fit, or the like. In this embodiment, an adhesive is used to bond the inner peripheral surface of the pipe receiving portion 62 and the outer peripheral surface of the vertical pipe portion 48. The second step portion 62b extends from the downstream end of the peripheral wall portion 62a toward the radial inside of the vertical pipe portion 48.

[0032] The second socket pipe 32 of this embodiment includes a plurality of pipe members 64, 66 that form the second internal water passage 60. The plurality of pipe members 64, 66 include a first pipe member 64 provided on the upstream side of the second socket pipe 32, and a second pipe member 66 in the second socket pipe 32. The plurality of pipe members 64, 66 are made of a hard material. The second socket pipe 32 is supported by a floor F by placing a leg portion 68 provided on the first pipe member 64 and a socket side flange portion 34a provided on the second pipe member 66 on the floor F.

[0033] In addition to the above-mentioned pipe receiving portion 62, the first pipe member 64 includes a first bent pipe section 70 provided downstream of the pipe receiving portion 62. The first bent pipe section 70 bends from downward to forward toward the downstream side.

[0034] The first pipe member 64 includes a second adjuster pipe section 72 provided downstream of the first bent pipe section 70. The second adjuster pipe section 72 extends in the front-rear direction A and is generally linear. The length of the second adjuster pipe section 72 in the pipe axis direction can be adjusted by cutting it. The second socket pipe 32 can adjust the drainage core La that it can accommodate by adjusting the length of the second adjuster pipe section 72.

[0035] The second pipe member 66 includes, in addition to the aforementioned drain pipe connection portion 34, a cylindrical pipe insertion portion 74 into which the downstream end portion of the second adjuster pipe portion 72 is inserted. The first pipe member 64 is fixed to the second pipe member 66 using an adhesive or the like in a state in which the second adjuster pipe portion 72 of the first pipe member 64 is inserted into the pipe insertion portion 74 of the second pipe member 66.

[0036] The second pipe member 66 includes a second bent pipe section 76 that is provided downstream of the pipe insertion section 74. The second bent pipe section 76 bends from forward to downward toward the downstream side.

[0037] Please refer to Figures 2, 3, and 5. The vertical pipe section 48 of the above-mentioned first socket pipe 30 has a non-circular cross-sectional section 78 provided in at least a part of the range extending in the pipe axis direction Da. The non-circular cross-sectional section 78 of this embodiment is provided so as to continue downstream from an inner corner portion 80a of a bending point 80 formed by the vertical pipe section 48 and the front pipe section 46 (see Figure 3). The pipe connection section 56 of the first socket pipe 30 is formed by the non-circular cross-sectional section 78 of the vertical pipe section 48.

[0038] The irregular cross-sectional portion 78 has a hollow irregular cross-sectional shape, and forms a part of the first internal water channel 45 therein. The "cross-sectional shape" here refers to a cross section perpendicular to the pipe axis direction Da of the vertical pipe portion 48. The "irregular cross-sectional shape" here means a cross-sectional shape other than a circle. The irregular cross-sectional shape can also be considered as a cross-sectional shape in which the distance distribution in the circumferential direction from the central axis CL1 of the vertical pipe portion 48 to the outer circumferential surface varies, that is, a cross-sectional shape in which the distance distribution is non-uniform.

[0039] The irregular cross-sectional portion 78 of this embodiment has a flat cross-sectional shape. In this specification, "flat" refers to a shape having an aspect ratio, which is the ratio of the major axis Lc2 to the minor axis Lc1, exceeding 1.0. Here, the "minor axis Lc1" refers to the dimension in the minor axis direction P, and the "major axis Lc2" refers to the dimension in the major axis direction Q. The "major axis direction Q" refers to the direction having the maximum dimension in a cross section perpendicular to the central axis CL1 of the vertical tube portion 48, and the "minor axis direction P" refers to the direction perpendicular to the major axis direction Q in that cross section. In this embodiment, the flat cross-sectional shape has an aspect ratio of 1.1 or more. The upper limit of this aspect ratio is a size that can be obtained practically in manufacturing, for example, 10.0.

[0040] The irregular cross-sectional portion 78 of this embodiment has a cross-sectional shape that does not have rotational symmetry. The cross-sectional shape of the irregular cross-sectional portion 78 is a shape that does not overlap with the original figure when rotated around the central axis CL1 by a rotation angle of less than 360°. Consider a case where a pipe connection portion 56 (described later) formed by the irregular cross-sectional portion 78 is connected to the second socket pipe 32. In this case, by making the irregular cross-sectional portion 78 have a cross-sectional shape that does not have rotational symmetry, it is possible to prevent erroneous assembly in which the second socket pipe 32 is assembled in the wrong direction relative to the pipe connection portion 56.

[0041] The irregular cross-sectional portion 78 of this embodiment is arranged so that the short axis direction P that defines the flattened cross-sectional shape is aligned with the front-rear direction A. The irregular cross-sectional portion 78 arranged in this manner has a cross-sectional shape in which the front-rear dimension Lb1 is smaller than the left-right dimension Lb2. Here, the "front-rear dimension" refers to the dimension in the front-rear direction A in a cross section of the irregular cross-sectional portion 78 perpendicular to the tube axis direction Da, and the "left-right dimension" refers to the dimension in the left-right direction B.

[0042] The cross-sectional shape of the irregular cross-sectional portion 78 in this embodiment includes a crushed portion 82 in which a part of the circular cross-sectional shape is crushed radially inward, and an arc portion 84 of a constant curvature provided on the opposite side of the central axis CL1 to the crushed portion 82. The irregular cross-sectional portion 78 is flatter than the circular cross-sectional shape at the crushed portion 82. In this embodiment, the crushed portion 82 is provided in a front portion of the irregular cross-sectional portion 78, and the arc portion 84 is provided in a rear portion of the irregular cross-sectional portion 78. The crushed portion 82 in this embodiment is provided with a flat portion 86.

[0043] The pipe receiving portion 62 of the second socket pipe 32 is capable of receiving the pipe connecting portion 56 formed by the irregular cross-sectional portion 78 of the first socket pipe 30. It can also be said that the pipe receiving portion 62 has a cross-sectional shape capable of receiving the irregular cross-sectional portion 78. This makes it possible to determine the relative position of the first socket pipe 30 with respect to the second socket pipe 32 around the central axis CL1 of the vertical pipe portion 48. The pipe connecting portion 56 formed by the irregular cross-sectional portion 78 is non-rotatably received in the pipe receiving portion 62.

[0044] The effects of the drain socket 12 described above will now be described.

[0045] (A) A portion of the irregular cross-sectional portion 78 of the first socket pipe 30 constitutes a pipe connection portion 56 that can be fitted into the second socket pipe 32. This fitting restricts the rotation of the first socket pipe around the central axis CL1 of the vertical pipe portion 48, and prevents the first socket pipe 30 from shifting in position relative to the second socket pipe 32. This in turn prevents a situation in which the drain socket 12 is unable to connect the toilet 16 and the drain pipe 10 due to such misalignment.

[0046] (B) In addition, by using the second socket pipe 32 corresponding to the connection method of the drain pipe 10, it is possible to provide flexibility in the connection method that can be supported. For example, if the connection method of the drain pipe 10 is a flange method, this can be realized by using the corresponding second socket pipe 32. In addition, if the connection method of the drain pipe 10 is a slip-in method, this can be realized by using the corresponding second socket pipe 32.

[0047] (C) The irregular cross-sectional portion 78 has a cross-sectional shape in which the front-to-back dimension Lb1 is smaller than the left-to-right dimension Lb2. The advantages of this will be explained with reference to FIG. 6. A cross-sectional shape in which the left-to-right dimension Lb2 and the front-to-back dimension Lb1 are the same is called a dimensionally isotropic structure 88. A cross-sectional shape in which the front-to-back dimension Lb1 is smaller than the left-to-right dimension Lb2 is called a dimensionally anisotropic structure 90. In FIG. 6, the front-to-back dimension Lb1 of the dimensionally anisotropic structure 90 is smaller than the front-to-back dimension Lb1 of the dimensionally isotropic structure 88 by the distance G.

[0048] Consider the case where the first socket pipe 30 is placed at a location with the same front-to-rear dimension L1 from the wall part W of the toilet room for each of the dimensionally isotropic structure 88 and the dimensionally anisotropic structure 90. In this case, according to the dimensionally anisotropic structure 90, the front end position 62c of the pipe receiving part 62 of the first pipe member 64 can be shifted rearward by the distance G compared to the dimensionally isotropic structure 88. Accordingly, the pipe insertion part 74 of the second pipe member 66 can be moved rearward. Furthermore, according to the dimensionally anisotropic structure 90, the lower limit of the range of the drainage core La that can be accommodated can be made wider by the distance G compared to the dimensionally isotropic structure 88. This means that the adjustment range in the front-to-rear direction A of the drainage core range that can be accommodated by the drain socket 12 can be made wider.

[0049] The pipe receiving portion 62 of the second socket pipe 32 and the pipe connecting portion 56 of the first socket pipe 30 are connected using adhesive. Therefore, compared to the case where a gasket is used for connection, the influence of the deterioration of the watertightness due to aging can be eliminated. In addition, the reliability of the watertightness can be improved.

[0050] The above-mentioned ingenuity of the drain socket 12 will be described. Please refer to Figs. 2, 7, and 8. Fig. 8 is also a side view of the first socket pipe 30 described next. The first socket pipe 30 can be used for both the drain socket 12 of the first specification Sa (hereinafter also referred to as the double-pipe specification Sa) and the drain socket 12 of the second specification Sb (hereinafter also referred to as the single-pipe specification Sb). The drain socket 12 of the double-pipe specification Sa is configured using both the first socket pipe 30 and the second socket pipe 32. The drain socket 12 of the single-pipe specification Sb is configured using only the first socket pipe 30 of the first socket pipe 30 and the second socket pipe 32.

[0051] The first socket pipe 30 can be used in either a first corresponding form Fa corresponding to the double pipe specification Sa or a second corresponding form Fb corresponding to the single pipe specification Sb. When in the first corresponding form Fa, the length of the vertical pipe portion 48 is shorter than when in the second corresponding form Fb. In Figs. 2 to 6, the drain socket 12 of the double pipe specification Fa and the first socket pipe 30 of the first corresponding form Fa have been described.

[0052] When in the second corresponding form Fb, the drain pipe connection portion 34 is formed by the downstream end of the vertical pipe portion 48. The irregular cross-section portion 78 of this embodiment is provided upstream of the drain pipe connection portion 34 in the vertical pipe portion 48 in the second corresponding form Fb. When in the second corresponding form Fb, the vertical pipe portion 48 of this embodiment has a circular cross-section portion 94 of a circular shape provided downstream of the irregular cross-section portion 78. The circular cross-section portion 94 of this embodiment is provided in the vertical pipe portion 48 in the range extending in the pipe axial direction from the drain pipe connection portion 34 to the irregular cross-section portion 78.

[0053] When in the second corresponding form Fb, the second corresponding form Fb can be switched to the first corresponding form Fa by cutting the irregular cross-sectional portion 78 of the vertical pipe portion 48. This cutting position Pa is shown in FIG. 8. At this time, by cutting the irregular cross-sectional portion 78, a part of the vertical pipe portion 48 from the drain pipe connection portion 34 to the upstream side is removed. When the irregular cross-sectional portion 78 is cut, that is, when in the first corresponding form Fa, a cut end portion 92 is provided on the cut surface side of the irregular cross-sectional portion 78. The cut end portion 92 constitutes the pipe connection portion 56 that can be fitted into the second socket pipe 32. When in the first corresponding form Fa, the irregular cross-sectional portion 78 of the vertical pipe portion 48 constitutes the pipe connection portion 56.

[0054] Please refer to FIG. 2. When used with the drain socket 12 of the double pipe specification Sa, the first socket pipe 30 in the first corresponding form Fa can be connected to the drain pipe 10 having the first drain core La1 via the second socket pipe 32. At this time, the drain pipe connection part 34 of the drain socket 12 is formed by the downstream end part of the second socket pipe 32. A part of the second internal water channel 60 is formed inside this drain pipe connection part 34. When used with the double pipe specification Sa, the drain pipe connection part 34 of this embodiment is connected to the drain pipe 10 by the flange method as described above.

[0055] Please refer to Figure 7. When used with a drain socket 12 of single pipe specification Sb, the drain pipe connection part 34 of the drain socket 12 is formed by the downstream end part of the first socket pipe 30 in the second corresponding form Fb. A part of the first internal water channel 45 is formed inside this drain pipe connection part 34. At this time, the first socket pipe 30 becomes capable of connecting the drain pipe connection part 34 to a drain pipe 10 having a second drain core La2 different from the first drain core La1.

[0056] When used for the single-pipe specification Sb, the drain pipe connection part 34 of this embodiment is connected to the drain pipe 10 by a slip-in method. The slip-in method is a method in which the drain pipe connection part 34 is inserted into the drain pipe 10 and then watertightly connected to the drain pipe 10 via a first seal member 38. The first seal member 38 used in the slip-in method is an elastic member such as a gasket.

[0057] In this way, when the first socket pipe 30 is used in a drain socket 12 of double pipe specification Sa, it can be connected to the drain pipe 10 of the first drain core La1 via the second socket pipe 32. In addition, when the first socket pipe 30 is used in a drain socket 12 of single pipe specification Sb, it can be connected to the drain pipe 10 of the second drain core La2. Therefore, by using the single pipe specification Sb and the double pipe specification Sa depending on the drain core La at the site, it is possible to have flexibility in the drain core La that can be used.

[0058] In addition, the first socket pipe 30 can be shared by both the double pipe specification Sa and the single pipe specification Sb drain sockets 12. Therefore, the number of parts can be reduced compared to when the drain sockets 12 of both specifications are configured only with dedicated parts. In addition, it is possible to reduce product costs by using the drain sockets 12 of both specifications.

[0059] The first socket pipe 30 is equipped with a first adjuster pipe portion 54. Therefore, when used in either the double pipe specification Sa or the single pipe specification Sb, the range of the applicable drainage core La can be expanded by adjusting the length of the first adjuster pipe portion 54.

[0060] When in the second corresponding form Fb, the vertical pipe portion 48 has a circular cross-sectional portion 94, and the circular cross-sectional portion 94 can form the drain pipe connection portion 34 in the single pipe specification Sb. Therefore, when connecting the circular drain pipe 10 and the drain pipe connection portion 34 by the slip-in method or the like, it becomes easier to uniformly deform the first seal member 38 placed between them over the entire circumference. Furthermore, compared to the case where the drain pipe connection portion 34 is formed by the irregular cross-sectional portion 78, it becomes easier to obtain stable sealing performance by the first seal member 38 without using an adapter.

[0061] Another feature of the drain socket 12 will now be described with reference to Fig. 9. Fig. 9 is also a side cross-sectional view of a portion of the first socket pipe 30 seen from the same perspective as Fig. 2. The main body pipe 40 has a bent water passage 96 provided inside the bent portion 80 formed by the front pipe portion 46 and the vertical pipe portion 48. The bent water passage 96 is provided as part of the first internal water passage 45, and bends from rearward to downward toward the downstream side.

[0062] A Cartesian coordinate system is assumed with the origin O being a predetermined position at the corner 96a on the inside of the bend of the curved waterway 96. This Cartesian coordinate system has an X-axis with the forward direction being positive and a Y-axis with the upward direction being positive. The X-axis is parallel to the front-back axis, and the Y-axis is parallel to the up-down axis.

[0063] The corner 96a in this embodiment is curved on an XY plane (hereinafter, referred to as a reference plane) passing through the central axis CL1 of the vertical pipe 48. FIG. 9 is also a diagram showing this reference plane. The central axis CL2 of the front pipe 46 is ideally provided on the reference plane. In this case, the "predetermined position" that defines the origin O is the midpoint position M0 of the line formed by the corner 96a on the reference plane. This midpoint position M0 refers to a position that is equidistant on the line formed by the corner 96a from the boundary position M1 between the corner 96a and the front pipe 46 and the boundary position M2 between the corner 96a and the vertical pipe 48. These boundary positions M1 and M2 are, for example, the inflection points formed by the pipes 46, 48 and the corner 96a. In addition, when the corner 96a is sharp, the "predetermined position" refers to the tip of the sharp corner 96a.

[0064] In this Cartesian coordinate system, it is assumed that the cutting plane is rotated around the origin O in an angle range Rθ of 120° to 150° with respect to the X-axis. The angle here refers to the angle that the cutting plane makes with the X-axis, starting from the positive part of the X-axis. This cutting plane refers to a plane that is perpendicular to the XY plane and passes through the origin O. The cutting plane that passes through this angle range Rθ passes through the bent water channel 96 and serves as an index showing the cross-sectional area of ​​the water channel.

[0065] In this case, the cross-sectional area of ​​the water channel that is the smallest within the angle range Rθ at the cutting surface is S0 [mm 2The "channel cross-sectional area" here refers to the cross-sectional area of ​​the first internal channel 45 on a cut surface. The channel cross-sectional area S0 is, for example, the channel cross-sectional area of ​​a cut surface passing through a position that forms an angle of 150° with respect to the X-axis. In this case, the channel cross-sectional area S1 [mm 2 ] is smaller than the water channel cross-sectional area S0. When this condition is satisfied, the lower limit of the water channel cross-sectional area S1 is, for example, the water channel cross-sectional area at the point where the water channel cross-sectional area is smallest in the toilet drainage channel 20. In addition, the water channel cross-sectional area S2 of the circular cross-sectional portion 94 may be larger than the water channel cross-sectional area S1 of the irregular cross-sectional portion 78. The water channel cross-sectional area S1. S2 here refers to the area of ​​the first internal water channel 45 in a cross section perpendicular to the pipe axis direction Da of the vertical pipe portion 48.

[0066] This makes it possible to increase the range of the water flow in the irregular cross-sectional portion 78 compared to when the water channel cross-sectional area S1 of the irregular cross-sectional portion 78 is the same as the water channel cross-sectional area S0. As a result, the siphon effect can be promoted inside the irregular cross-sectional portion 78.

[0067] In addition, the channel cross-sectional area S1 of the irregular cross-sectional portion 78 may be larger than the channel cross-sectional area S0. When this condition is satisfied, the upper limit of the channel cross-sectional area S1 is, for example, the channel cross-sectional area at the point where the channel cross-sectional area is maximum in the front pipe portion 46. When this condition is satisfied, the channel cross-sectional area S2 of the circular cross-sectional portion 94 may be smaller than the channel cross-sectional area S1 of the irregular cross-sectional portion 78.

[0068] This makes it possible to reduce the area occupied by the water flow in the irregular cross-sectional portion 78, compared to when the water channel cross-sectional area S1 of the irregular cross-sectional portion 78 is the same as the water channel cross-sectional area S0. As a result, it is possible to suppress the siphon phenomenon inside the irregular cross-sectional portion 78. In addition, it is possible to suppress clogging of the inside of the irregular cross-sectional portion 78 with foreign matter.

[0069] (Second embodiment) See Fig. 10. The second socket pipe 32 of this embodiment has a single pipe member 98 that constitutes the second internal water channel 60. In detail, the pipe member 98 has, in addition to the pipe receiving portion 62 and the drain pipe connecting portion 34, an eccentric pipe portion 100 that is eccentric with respect to the central axis of the pipe receiving portion 62. The eccentric pipe portion 100 extends in the vertical direction C and is linear as a whole. The drain pipe connecting portion 34 is formed by the downstream end portion of the eccentric pipe portion 100.

[0070] In this way, the second internal water passage 60 of the second socket pipe 32 may be formed by a plurality of pipe members 98, or may be formed by a single pipe member 98. When formed by a plurality of pipe members 98, any of the pipe members 98 may not be provided with the adjuster pipe portion 72.

[0071] (Third embodiment) Please refer to Fig. 11. Fig. 11 shows the first socket pipe 30 of the second corresponding form Fb. The first socket pipe 30 in the second corresponding form Fb does not have a circular cross-sectional portion 94, unlike the first embodiment. Instead, the drain pipe connection portion 34 of the first socket pipe 30 in the second corresponding form Fb is configured by a non-circular cross-sectional portion 78.

[0072] Thus, in the second corresponding form Fb, the circular cross-sectional portion 94 of the first socket pipe 30 is not essential. In this case, the drain pipe connection portion 34 of the first socket pipe 30 may be connected to the drain pipe 10 via an adapter.

[0073] Other variations of each component are described.

[0074] The orientation of the upstream end opening 10a of the drain pipe 10 is not particularly limited. In the wall embodiment, an example in which the central axis CL1 of the drain pipe 10 is vertically provided has been described. In addition, the central axis CL1 of the drain pipe 10 may be slightly inclined with respect to the vertical line.

[0075] In the embodiment, the toilet 16 is described as being of a floor-standing type. Alternatively, the toilet 16 may be of a wall-hanging type.

[0076] The connected portion 20a of the toilet 16 may extend linearly downward toward the downstream side. In this case, the toilet connection portion 52 of the drain socket 12 is provided, for example, at the upstream end of the vertical pipe portion 48.

[0077] The bolt fixing portion 50 of the first socket pipe 30 may be fixed to the toilet bowl 16 instead of to the wall W of the toilet room.

[0078] To obtain the effects described in (A) and (B), it is not necessary to cut the irregular cross-sectional portion 78 of the first socket pipe 30. In other words, unlike the embodiment, the first socket pipe 30 may not be used for the single-pipe specification Sb, but may be used exclusively for the drain socket 12 of the double-pipe specification Sa. In this case, the first socket pipe 30 only needs to be usable in the first corresponding form Fa, and does not need to be usable in the second corresponding form Fb.

[0079] In the drain socket 12 of the single pipe specification Sb, there is no particular limitation on the connection method of the drain pipe connection portion 34 of the first socket pipe 30. For example, the flange method or the like may be used in the case of the single pipe specification Sb as well.

[0080] In the drain socket 12 of the double-pipe specification Sa, the connection method of the drain pipe connection part 34 of the second socket pipe 32 is not particularly limited. For example, the slip-in method or the like may be used in the case of the double-pipe specification Sa. In addition, the DFC (Direct Floor Connection) method may be used in the drain socket 12 of the double-pipe specification Sa. In the DFC method, the second socket pipe 32 used in the flange method is fixed directly to the floor F without using a floor flange 36, thereby connecting the drain socket 12 to the drain pipe 10. The second socket pipe 32 is fixed to the floor F using an adhesive placed between the socket side flange part 34a and the floor F.

[0081] The irregular cross-sectional portion 78 may have a cross-sectional shape in which the left-right dimension Lb2 is smaller than the front-rear dimension Lb1. In order to obtain the effect described in (C), the irregular cross-sectional portion 78 does not have to be arranged so that the minor axis direction P is aligned with the front-rear direction A.

[0082] The first socket pipe 30 does not have to be provided with the first adjuster pipe portion 54. This assumes, for example, a case in which the toilet connection portion 52 is provided at the upstream end of the vertical pipe portion 48.

[0083] In the above embodiment, the pipe receiving portion 62 and the first bent pipe portion 70 of the second socket pipe 32 are provided in the first pipe member 64 having the second adjuster pipe portion 72. Alternatively, these may be provided in a pipe member separate from the first pipe member 64.

[0084] The water channel cross-sectional area S1 of the irregular cross-sectional portion 78 may be the same as the water channel cross-sectional area S0, unlike the embodiment.

[0085] The above-mentioned embodiments and modified forms are merely examples. The technical ideas abstracted from these should not be interpreted as being limited to the contents of the embodiments and modified forms. The contents of the embodiments and modified forms are subject to many design changes, such as changes, additions, and deletions of components. In the above-mentioned embodiments, the contents subject to such design changes are emphasized by adding the notation "embodiment". However, design changes are also permitted even in contents without such notation. The hatching on the cross section of the drawings does not limit the material of the hatched object. The structures referred to in the embodiments and modified forms naturally include structures that are shifted by an error amount that can be considered to be the same when considering manufacturing errors, etc.

[0086] Any combination of the above components is also effective. For example, any description of another embodiment may be combined with the embodiment, or any description of an embodiment and another variation may be combined with the variation. [Explanation of symbols]

[0087] 10...drain pipe, 12...drain socket, 16...toilet, 30...first socket pipe, 32...second socket pipe, 40...main pipe, 46...front pipe section, 48...vertical pipe section, 52...toilet connection section, 54...first adjuster pipe section, 56...pipe connection section, 62...pipe receiving section, 64...first pipe member, 66...second pipe member, 72...second adjuster pipe section, 74...pipe insertion section, 78...irregular cross-sectional section, 80...bent section, 92...cut end, 94...circular cross-sectional section, 96...bent water channel, 96a...corner section.

Claims

1. A socket pipe used in a drain socket that connects a floor drainage type drain pipe to a toilet bowl, A main body pipe having a toilet connection part to be connected to the connected part of the toilet and a vertical pipe part extending linearly in the vertical direction, The connected portion extends linearly along a horizontal direction, The vertical pipe portion has a non-circular cross-sectional portion provided in at least a part of the range in the pipe axis direction, When the irregular cross-section portion is cut, the cut end portion provided on the irregular cross-section portion forms a socket pipe that constitutes a pipe connection portion that can be fitted into another socket pipe that constitutes the drain socket.

2. This socket tube is When used with the drain socket of the first specification, it can be connected to the drain pipe having a first drain core via the other socket pipe, A socket pipe as described in claim 1, wherein when used in the drain socket of the second specification, the downstream end of the vertical pipe portion can be connected to the drain pipe having a second drain core different from the first drain core.

3. The main body pipe has an adjuster pipe portion extending in a front-rear direction, 3. The socket pipe according to claim 2, wherein the toilet connection portion is provided at an upstream end of the adjuster pipe portion.

4. A socket pipe used in a drain socket that connects a floor drainage type drain pipe to a toilet bowl, A main body pipe having a toilet connection portion connected to the toilet and a vertical pipe portion extending in a vertical direction, The vertical pipe portion has a non-circular cross-sectional portion provided in at least a part of the range in the pipe axis direction, When the irregular cross-section portion is cut, the cut end portion provided on the irregular cross-section portion constitutes a pipe connection portion that can be fitted into another socket pipe that constitutes the drain socket, The vertical pipe portion is a socket pipe having a circular cross-sectional portion provided downstream of the irregular cross-sectional portion.

5. The main body tube is a front pipe portion extending forward from an upstream end portion of the vertical pipe portion; A bent water channel is provided inside a bent portion formed by the front pipe portion and the vertical pipe portion, Assuming an orthogonal coordinate system consisting of an X-axis with a positive forward direction and a Y-axis with a positive upward direction, with a predetermined position at the corner on the inside of the bend of the bent waterway as the origin, and rotating the cut surface around the origin within an angle range of 120° to 150° with respect to the X-axis, the smallest waterway cross-sectional area on the cut surface is called S0, 5. The socket pipe according to claim 1, wherein a water passage cross-sectional area S1 of the irregular cross-sectional portion is smaller than the water passage cross-sectional area S0.

6. The main body tube is a front pipe portion extending forward from an upstream end portion of the vertical pipe portion; A bent water channel is provided inside a bent portion formed by the front pipe portion and the vertical pipe portion, Assuming an orthogonal coordinate system consisting of an X-axis with a positive forward direction and a Y-axis with a positive upward direction, with a predetermined position at the corner on the inside of the bend of the bent waterway as the origin, and rotating the cut surface around the origin within an angle range of 120° to 150° with respect to the X-axis, the smallest waterway cross-sectional area on the cut surface is called S0, 5. The socket pipe according to claim 1, wherein a water channel cross-sectional area S1 of the irregular cross-sectional portion is larger than the water channel cross-sectional area S0.

7. 7. The socket pipe according to claim 1, wherein the irregular cross-sectional portion has a cross-sectional shape in which the front-to-rear dimension is smaller than the left-to-right dimension.

8. A first socket tube which is the socket tube according to any one of claims 1 to 7; A drainage socket comprising: another socket pipe according to any one of claims 1 to 7; and a second socket pipe connected to the pipe connection portion of the first socket pipe.

9. The first socket tube is the socket tube according to claim 7, The second socket tube is a first pipe member having a pipe receiving portion into which the pipe connecting portion of the first socket pipe is fitted and an adjuster pipe portion extending in a front-rear direction; The drain socket according to claim 8 , further comprising: a second pipe member having a pipe insertion portion into which the adjuster pipe portion of the first pipe member is inserted.

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