Drain socket and toilet system

Abstract

To provide a drain socket in which waste is efficiently drained, and a toilet system.SOLUTION: A drain socket is provided with a pipe line that connects a drainage port disposed in a toilet bowl and opening toward backward and a drainage pipe disposed on a floor. The pipe line includes: a first pipe line which is located on a downstream side of the drainage port and in which an axial direction thereof has at least a backward vector; a second pipe line which is located on a downstream side of the first pipe line and in which an axial direction has at least downward vector; a third pipe line which is located on a downstream side of the second pipe line and in which an axial direction has a lower diagonal and forward vector; and a fourth pipe line which is located on a downstream side of the third pipe line and in which an axial direction has at least downward vector.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] Aspects of the present invention relate generally to drain sockets and toilet systems. [Background technology]

[0002] Drain sockets that connect a toilet to a building's drain pipe are known, and they redirect flush water while flushing waste into the drain pipe (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-68534 Summary of the Invention [Problem to be solved by the invention]

[0004] The drain socket described in Patent Document 1 flows flush water horizontally from rear to front just before the drain pipe. In such a case, there is a risk that waste material may get caught in the drain socket.

[0005] The present invention has been made based on the recognition of such problems, and aims to provide a drain socket and a toilet system that allows waste to flow away efficiently. [Means for solving the problem]

[0006] The first invention is a drain socket having a pipeline connecting a drain outlet in a toilet bowl that opens toward the rear and a drain pipe installed in the floor, the pipeline comprising: a first pipeline located downstream of the drain outlet and having an axial direction that has at least a backward vector, a second pipeline located downstream of the first pipeline and having an axial direction that has at least a downward vector, a third pipeline located downstream of the second pipeline and having an axial direction that has a downward diagonal forward vector, and a fourth pipeline located downstream of the third pipeline and having an axial direction that has at least a downward vector.

[0007] This drain socket allows the waste to fall freely when it flows from the first pipe to the second pipe. When the waste then flows from the second pipe to the third pipe, it comes into contact with the third pipe. Since the axial direction of the third pipe is a downward diagonal forward vector, the waste can be prevented from getting caught and can be allowed to flow to the fourth pipe. Therefore, in the drain socket where the waste must be redirected from the rear to the front, clogging of the waste can be prevented.

[0008] A second invention is a drain socket according to the first invention, characterized in that the second pipeline has a curved surface at the rear that protrudes outward and has a forward vector in addition to the downward vector.

[0009] According to this drain socket, by curving the rear of the second pipe, it has a forward vector in addition to a downward vector, and the axial direction is a downward oblique forward vector. As a result, when the tip side of the waste comes into contact with the inner surface of the second pipe, it flows through the second pipe along the inner surface of the second pipe. The second pipe can change the moving direction of the waste from backward to forward. As a result, when the waste comes into contact with the third pipe, the moving direction of the waste is already forward, making it easier to flow the waste forward. Therefore, in a drain socket where the direction of the waste must be changed from backward to forward, it is possible to make it less likely for the waste to clog.

[0010] A third invention is a drain socket according to the first invention, characterized in that at least the second pipe of the first pipe and the second pipe has a soft portion that is softer than the third pipe.

[0011] According to this drain socket, the soft part can widen the flow path in the pipe. Therefore, a wide flow path for changing direction from rear to front can be secured, and it becomes easier to change the direction of waste from rear to front. Therefore, in the drain socket where the direction of waste must be changed from rear to front, it is possible to make it less likely for waste to clog. Furthermore, the soft part can absorb construction errors when connecting the toilet drain and the drain pipe with the drain socket.

[0012] A fourth invention is the drain socket according to the first invention, characterized in that the third pipe has a curved surface at the rear that protrudes outward.

[0013] With this drain socket, when the tip of the waste comes into contact with the inner surface of the second pipe, the waste flows along the inner surface of the second pipe and reaches the third pipe. By providing a curved surface in the third pipe, the direction of waste movement can be easily changed from rearward to forward. This allows the direction of waste movement to be smoothly changed from rearward to forward. Therefore, in a drain socket where the direction of waste must be changed from rearward to forward, clogging with waste can be prevented.

[0014] A fifth invention is the drain socket according to the first invention, characterized in that a front end of the fourth pipeline is located forward of the drain outlet.

[0015] When the front end of the fourth pipe is located further forward than the toilet drain, the pipe is longer than when it is not located further forward. With this drain socket, the longer pipe improves the water flow in the drain socket, making it easier to flush away waste.

[0016] A sixth invention is a toilet system comprising the toilet bowl and the drain socket according to any one of the first to fifth inventions.

[0017] This toilet system makes it possible to reduce the occurrence of clogging due to waste.

[0018] A seventh invention is a toilet system characterized in that, in the sixth invention, it further includes a cabinet located behind the toilet, the toilet is attached to the cabinet with a gap formed between it and the floor, and the drain socket has a first part stored inside the cabinet and a second part located in the gap outside the cabinet.

[0019] According to this toilet system, the depth dimension of the cabinet can be made as small as possible.

[0020] An eighth invention is a toilet system characterized in that, in the seventh invention, it further comprises a drain pipe arranged below the upper surface of the floor, and the drain socket is connected to the drain pipe.

[0021] According to this toilet system, a drain socket can be provided in the space below the toilet bowl without the toilet bowl colliding with the drain pipe. Effect of the Invention

[0022] According to aspects of the present invention, a drain socket and toilet system is provided that provides efficient waste flow. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is a side view showing a toilet system equipped with a drain socket according to a first embodiment of the present invention. [Diagram 2] 2 is a rear view of the cabinet, the toilet, and the drain socket as viewed from the direction of the arrow AA in FIG. 1. [Diagram 3]2 is a cross-sectional view of the cabinet and the drain socket as viewed from the direction of the arrow BB in FIG. 1. [Figure 4] A cross-sectional view of the toilet bowl and drain socket. [Diagram 5] FIG. 4 is a cross-sectional view showing the drain socket alone. [Figure 6] FIG. 11 is an explanatory diagram of the case where waste flows through a first pipe. [Figure 7] FIG. 11 is an explanatory diagram of the case where waste flows from a first pipeline to a second pipeline. [Figure 8] FIG. 11 is an explanatory diagram of the case where waste flows from the second pipeline to the third pipeline. [Figure 9] FIG. 11 is an explanatory diagram of the case where waste flows from the third pipe to the fourth pipe. [Figure 10] FIG. 6 is a cross-sectional view showing a drainage socket according to a second embodiment of the present invention. [Figure 11] FIG. 11 is a cross-sectional view showing a drainage socket according to a third embodiment of the present invention. [Figure 12] FIG. 10 is a cross-sectional view showing a drainage socket according to a fourth embodiment of the present invention. [Figure 13] FIG. 10 is a cross-sectional view showing a drainage socket according to a fifth embodiment of the present invention. [Figure 14] FIG. 11 is a cross-sectional view showing a drainage socket according to a sixth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, like components are designated by like reference numerals and detailed description thereof will be omitted as appropriate.

[0025] Fig. 1 is a side view showing a toilet system equipped with a drain socket according to a first embodiment of the present invention, in which the left side surface of the cabinet has been removed. FIG. 2 is a rear view of the cabinet, the toilet, and the drain socket as viewed from the direction of the arrow AA in FIG. FIG. 3 is a cross-sectional view of the cabinet and the drain socket as viewed from the direction of the arrow BB in FIG. FIG. 4 is a cross-sectional view of a toilet bowl and drain socket. FIG. 5 is a cross-sectional view showing the drain socket alone.

[0026] As shown in Figure 1, the toilet system 1 includes a cabinet 10, a toilet bowl 20, and a drain socket 30. In this specification, "upper," "lower," "front," "rear," "left," and "right" refer to directions seen from a user seated on the toilet bowl 20 with his or her back to the cabinet 10.

[0027] Cabinet 10 is disposed on a wall W or floor F of the toilet room. Cabinet 10 has a front surface 11 and left and right side surfaces 12. A supply pipe 15, a drain socket 30, a cable (not shown), and the like are disposed inside cabinet 10. Supply pipe 15 connects a water source (e.g., a water supply system) and toilet bowl 20. Flush water that is supplied to toilet bowl 20 flows through supply pipe 15.

[0028] As shown in Figures 2 and 3, an opening 11a is provided in the front surface 11 of the cabinet 10, penetrating in the front-rear direction. This opening 11a is provided to correspond to the toilet bowl 20 described below. The opening 11a has a first opening 11a1 located on the floor F side and a second opening 11a2 located above the first opening 11a1. The second opening 11a2 is formed to be larger than the first opening 11a1. The first opening 11a1 and the second opening 11a2 are connected in the up-down direction.

[0029] The downstream end of a drain socket 30 (described later) is inserted into the first opening 11a1. The upstream end of the drain socket 30 is inserted into the second opening 11a2, and the downstream end of the supply pipe 15 is inserted into the second opening 11a2.

[0030] The drain pipe 100 is located below the opening 11a and is provided on the floor F. The opening of the drain pipe 100 is located below the upper surface of the floor F. The drain pipe 100 is connected to a drain socket 30. Wastewater and waste after flushing the toilet flows from the drain pipe 100 through the drain socket 30 into the sewer system.

[0031] The toilet 20 is attached to the front surface 11 of the cabinet 10 at a position corresponding to the opening 11a. In other words, the cabinet 10 is located behind the toilet 20. The toilet 20 is attached to the cabinet 10 with a gap S formed between it and the floor F. The gap S is located in front of the first opening 11a1.

[0032] The toilet 20 is a so-called seated toilet, and has a concave bowl portion 21 that is recessed downward from the upper surface 20a. A toilet seat (not shown) on which a user sits is provided on the upper surface 20a of the toilet 20. The toilet 20 receives waste materials such as urine and feces from the user in the bowl portion 21. When the user performs a toilet flushing operation, flush water is supplied from the supply pipe 15 to discharge the waste materials in the bowl portion 21 and clean the bowl portion 21. After the toilet flushing is completed, flush water (sealing water) collects in the bottom portion 21a of the bowl portion 21.

[0033] The rear surface of the toilet 20 is provided with a supply port 23 to which the supply pipe 15 is connected, and a drain port 25 to which the drain socket 30 is connected. The supply port 23 is located on the top surface 20a side of the toilet 20. The drain port 25 is located below the supply port 23 and opens toward the rear. The drain port 25 communicates with the bottom 21a of the bowl portion 21. In this case, the drain port 25 is located above the bottom 21a. As a result, flush water (sealing water) collects in the bottom 21a of the bowl portion 21 after the toilet flush is completed.

[0034] The drain socket 30 has a conduit 31 that connects the drain outlet 25 and the drain pipe 100. The conduit 31 is cylindrical and made of, for example, polyvinyl chloride. As shown in Figures 1 and 2, the conduit 31 extends in the vertical direction between the drain outlet 25 and the drain pipe 100.

[0035] As shown in FIG. 5, the pipeline 31 has, from the upstream side to the downstream side, a first pipeline 31a, a second pipeline 31b, a third pipeline 31c, and a fourth pipeline 31d. The shapes of the first pipeline 31a to the fourth pipeline 31d will be described using the axial directions 32a to 32d. The axial directions 32a to 32d are the directional components of the washing water flowing in the center of each of the first pipeline 31a to the fourth pipeline 32d. In other words, the axial directions 32a to 32d are the main stream of the washing water flowing in the pipeline 31. The first to fourth pipelines 31a to 31d are divided according to the axial directions 32a to 32d (the direction of the flow of the washing water), and do not mean that the first to fourth pipelines 31a to 31d are formed of different members. The first to fourth pipelines 31a to 31d may be integrally formed of the same member, or may be formed of separate members. That is, the pipeline 31 may have pipelines connected to the first to fourth pipelines 31a to 31d.

[0036] The first pipe 31a is located downstream of the drain outlet 25, and the axial direction 32a has at least a backward vector. In this example, the first pipe 31a has an axial direction 32a of a downward oblique backward vector due to a backward vector and a downward vector. The first pipe 31a only needs to have an axial direction 32a having at least a backward vector. That is, the first pipe 31a may extend horizontally backward from the drain outlet 25. The first pipe 31a also has a curved surface 31a1 at the rear that protrudes outward. The curved surface 31a1 is curved in the up-down direction.

[0037] The second pipe 31b is located downstream of the first pipe 31a, and the axial direction 32b has at least a downward vector. In this example, the second pipe 31b has a curved surface 31b1 protruding outward at the rear. The curved surface 31b1 is curved in the up-down direction. As a result, the second pipe 31b has a forward vector in addition to a downward vector, and thus has an axial direction 32b of a downward oblique forward vector. The intersection X of the curved surface 31a1 of the first pipe 31a and the curved surface 31b1 of the second pipe 31b is a point where the vector direction is vertically downward. It is sufficient that the second pipe 31b has at least an axial direction 32b of a downward vector.

[0038] At least the second pipe 31b of the first pipe 31a and the second pipe 31b has a soft portion 33 that is softer than the third pipe 31c. That is, the second pipe 31b has a flexible pipe portion. For example, the curved surface 31b1 of the second pipe 31b is the soft portion 33. The soft portion 33 is provided, for example, above the halfway position in the vertical direction of the second pipe 31b (on the first pipe 31a side). In other words, the soft portion 33 is provided at a portion where the wash water flowing from the first pipe 31a collides with the second pipe 31b.

[0039] The soft part 33 is deformed outward by being pressed by the flushing water. This expands the inside of the second pipe 31b, so that waste can be efficiently flushed away. The soft part 33 can absorb the construction error when connecting the drain outlet 25 and the drain pipe 100 with the drain socket 30, and can connect the drain socket 30 to the drain outlet 25 and the drain pipe 100. The first pipe 31a and the second pipe 31b may both have soft parts. The first pipe 31a and the second pipe 31b may be entirely made of soft parts. The soft part 33 may be provided as necessary. That is, the pipe 31 does not need to have such flexibility that all of the first to fourth pipes 31a to 31d are deformed by being pressed by the flushing water.

[0040] The third pipe 31c is located downstream of the second pipe 31b, and has an axial direction 32c with a downward oblique forward vector. The pipe 31 is designed so that the flow of flush water is not restricted by making the axial direction 32c of the third pipe 31c downward oblique forward. Even if the flow rate of flush water weakens in the third pipe 31c, the waste flows toward the fourth pipe 31d due to its own weight. This allows the pipe 31 to efficiently drain flush water and waste from the third pipe 31c through the fourth pipe 31d to the drain pipe 100.

[0041] The fourth pipe 31d is located downstream of the third pipe 31c, and the axial direction 32d has at least a downward vector. The lower end side of the fourth pipe 31d is a portion connected to the drain pipe 100 extending in the vertical direction. The third pipe 31c and the fourth pipe 31d are harder than the second pipe 31b. That is, the third pipe 31c and the fourth pipe 31d do not have the flexibility to be deformed by being pressed by the flushing water. In particular, because the third pipe 31c is hard, the drain socket 30 can be prevented from being deformed even if it is subjected to the gravity of the waste 200 falling downward. This makes it possible to prevent the pipe 31 from being blocked, and ensure the flow of flushing water in the third pipe 31c.

[0042] As shown in FIG. 4, the front end 31d1 of the fourth pipe 31d is located forward of the drain outlet 25. The position indicated by the dotted line O1-O1 in FIG. 4 is the position of the front end 31d1 of the fourth pipe 31d. The position indicated by the dashed line O2-O2 in FIG. 4 is the position of the drain outlet 25. In other words, in the vertical direction, the drain outlet 25 is located inside the drain pipe 100. This makes the pipe 31 generally C-shaped, and the overall length can be made as long as possible. Therefore, the pipe 31 can straighten the flow of flush water and efficiently flush waste into the drain pipe 100.

[0043] A downstream front end 31c1 of the third pipe 31c and a front end 31d1 of the fourth pipe 31d are located forward of the front surface 11 of the cabinet 10. In this case, the front ends of the third pipe 31c and the fourth pipe 31d protrude from the first opening 11a1 of the front surface 11 toward the gap S. That is, the drain socket 30 has a first portion 30a that is stored inside the cabinet 10 and a second portion 30b that is located in the gap S outside the cabinet 10. This makes it possible to make the depth dimension D of the cabinet 10 as small as possible.

[0044] The second portion 30b is covered by a cover 110. The cover 110 is attached to the front surface portion 11 at a position corresponding to the first opening 11a1 of the cabinet 10. That is, the cover 110 is located within the gap S and covers the front of the first opening 11a1.

[0045] The drain socket 30 has a flange 34 that protrudes outward from the fourth pipe 31d. This flange 34 is the part that is screwed to the floor F. The drain socket 30 is screwed to the floor F with the fourth pipe 31d connected to the drain pipe 100. The toilet 20 is provided above the drain pipe 100. Here, for example, if the drain pipe 100 protrudes above the upper surface of the floor F, it must be designed so that the toilet 20 and the drain pipe 100 or the toilet 20 and the drain socket 30 do not collide. For example, in order to prevent the drain socket 30 and the toilet 20 from colliding, the height of the space S below the toilet 20 must be designed high. Therefore, by providing the drain pipe 100 below the upper surface of the floor F and connecting the drain pipe 100 provided below the upper surface of the floor F to the drain socket 30, the drain socket 30 can be provided in the space S below the toilet 20 without the toilet 20 and the drain pipe 100 colliding.

[0046] Next, the flow of waste 200 through the drain socket 30 will be described. FIG. 6 is an explanatory diagram of a case where waste flows through the first pipe. FIG. 7 is an explanatory diagram of a case where waste flows from the first pipe to the second pipe. FIG. 8 is an explanatory diagram of a case where waste flows from the second pipe to the third pipe. FIG. 9 is an explanatory diagram of a case where waste flows from the third pipe to the fourth pipe. 6 to 9, only the waste 200 is shown, and the wash water is omitted.

[0047] When the toilet flushing operation is performed, flush water is supplied from supply pipe 15 into bowl portion 21, and the flush water and waste 200 in bowl portion 21 flow toward drain outlet 25. Here, waste 200 is explained by taking as an example a long, solid object that is likely to clog the drain socket. As shown in Figure 6, waste 200 flows from drain outlet 25 to first pipe 31a.

[0048] As shown in Fig. 7, the waste 200 flows from the first pipe 31a toward the second pipe 31b. The rear of the first pipe 31a and the second pipe 31b have curved surfaces 31a1 and 31b1. This allows the waste 200 to flow smoothly from the curved surface 31a1 of the first pipe 31a along the curved surface 31b1 of the second pipe 31b.

[0049] In addition, the curved surface 31b1 of the second pipe 31b is a flexible soft portion 33. As a result, the second pipe 31b is pressed in the direction of the arrow in Fig. 7 by the wash water flowing inside, and the inner diameter becomes wider. Therefore, the waste 200 flowing from the first pipe 31a to the second pipe 31b is prevented from being caught.

[0050] The second pipe 31b has a forward vector in addition to a downward vector by curving the rear, and the axial direction 32b is a downward oblique forward vector. As a result, when the tip side of the waste 200 contacts the inner surface of the second pipe 31b, the waste 200 flows through the second pipe 31b along the inner surface of the second pipe 31b. The second pipe 31b can change the moving direction of the waste 200 from backward to forward. As a result, when the waste 200 contacts the third pipe 31c, the moving direction of the waste 200 is already forward, so that the waste 200 can be made to flow forward more easily. Therefore, the waste 200 is less likely to clog the drain socket 30, which must change the direction of the waste 200 from backward to forward.

[0051] As shown in Fig. 8, the waste 200 flows from the second pipe 31b toward the third pipe 31c. In this case, the axial direction 32c of the third pipe 31c has a vector that faces downward and forward. Because the axial direction 32c has a downward vector, the waste 200 flows smoothly from the second pipe 31b toward the third pipe 31c due to the flow rate of the flush water and its own weight.

[0052] As shown in Fig. 9, the waste 200 flows from the third pipe 31c to the fourth pipe 31d. As described above, the third pipe 31c has a downward vector. This allows the waste 200 to flow smoothly from the third pipe 31c to the fourth pipe 31d due to the flow rate of the flush water and its own weight.

[0053] In this way, the pipe 31 of the drain socket 30 has a downward vector in all of the axial directions 32a-32d of the first to fourth flow paths 31a-31d. This enables the pipe 31 to efficiently drain the waste 200 into the drain pipe 100 by the flow rate of the flush water and its own weight.

[0054] Here, for example, if the entire pipe 31 were made flexible, the degree of freedom of deformation of the pipe 31 would be large, and the pipe 31 would bend or twist due to the flow of flushing water, which could prevent the flushing water and waste from flowing smoothly. Therefore, of the first pipe 31a and the second pipe 31b of the pipe 31, at least the second pipe 31b is made softer than the third pipe 31c. This allows the inner diameter of the second pipe 31b to be widened by the flow of flushing water, allowing the flushing water and waste 200 to flow smoothly.

[0055] Furthermore, the front end 31d1 of the fourth pipe 31d is located forward of the drain outlet 25. That is, the drain pipe 100 is located below the drain outlet 25. This allows the overall length of the pipe 31 to be as long as possible. Therefore, the pipe 31 can straighten the flow of flush water, and can efficiently flush waste into the drain pipe 100.

[0056] Next, a drain socket 40 according to a second embodiment of the present invention will be described with reference to Fig. 10. In the second embodiment, the same components as those in the drain socket and toilet stem according to the first embodiment are given the same reference numerals, and their description will be omitted. FIG. 10 is a cross-sectional view showing a drainage socket according to a second embodiment of the present invention.

[0057] The drain socket 40 has the first to fourth pipelines 31a to 31d. In this case, the third pipeline 31c has a curved surface 42 protruding outward at the rear. Specifically, the rear surface of the third pipeline 31c has a first extending surface portion 41 extending from the second pipeline 31b, a curved surface 42 connected to the first extending surface portion 41, and a second extending surface portion 43 extending from the curved surface 42 toward the fourth pipeline 31d. The first extending surface portion 41 extends linearly from the rear surface of the second pipeline 31b. The curved surface 42 is curved in the up-down direction. The first extending surface portion 41 is formed shorter than the second extending surface portion 43. That is, the curved surface 42 is located closer to the second pipeline 31b. The curved surface 42 widens the inner diameter of the third pipeline 31c.

[0058] The drain socket 40 according to the second embodiment has the same action and effect as the drain socket 30 according to the first embodiment. The drain socket 40 allows waste to flow smoothly from the curved surface 31a1 of the first pipeline 31a along the curved surface 31b1 of the second pipeline 31b. Furthermore, the waste flows from the first extension surface portion 41 through the curved surface 42 along the second extension surface portion 43. In this case, the curved surface 42 makes it easier to change the direction of the waste flowing from the second pipeline 31b to the third pipeline 31c. Therefore, the waste can be efficiently flowed from the first pipeline 31a toward the fourth pipeline 31d.

[0059] Next, a drain socket 50 according to a third embodiment of the present invention will be described with reference to Fig. 11. In the third embodiment, the same components as those in the drain socket and toilet stem according to the first embodiment are given the same reference numerals, and their description will be omitted. FIG. 11 is a cross-sectional view showing a drainage socket according to a third embodiment of the present invention.

[0060] The drain socket 50 has a pipe 51 that connects the drain outlet 25 and the drain pipe 105. The pipe 51 is cylindrical and made of, for example, polyvinyl chloride. The pipe 51 extends in the vertical direction between the drain outlet 25 and the drain pipe 105. In the above-mentioned first embodiment, an example has been described in which the opening of the drain pipe 100 is below the upper surface of the floor F. On the other hand, the drain pipe 105 protrudes upward from the upper surface of the floor F. The drain socket 50 is configured to be attached to the drain pipe 105, for example.

[0061] The pipe 51 has, from the upstream side to the downstream side, a first pipe 51a, a second pipe 51b, a third pipe 51c, and a fourth pipe 51d. The shapes of the first pipe 51a to the fourth pipe 51d will be described using axial directions 52a to 52d. The axial directions 52a to 52d are directional components of the flow of the wash water at the center of each of the first pipe 51a to the fourth pipe 52d. In other words, the axial directions 52a to 52d are the main stream of the wash water flowing inside the pipe 51.

[0062] The first pipe 51a is located downstream of the drain outlet 25, and has at least a backward vector in its axial direction 52a. In this example, the first pipe 51a has a backward vector and a downward vector, resulting in an axial direction 52a of a downward oblique backward vector. The first pipe 51a only needs to have an axial direction 52a that has at least a backward vector. That is, the first pipe 51a may extend horizontally backward from the drain outlet 25. The first pipe 51a also has a curved surface 51a1 at the rear that protrudes outward. The curved surface 51a1 is curved in the up-down direction.

[0063] The second pipe 51b is located downstream of the first pipe 51a, and has an axial direction 52b with a downward vector. The intersection Y between the curved surface 51a1 of the first pipe 51a and the second pipe 51b is a point where the vector is oriented vertically downward.

[0064] At least the second pipe 51b of the first pipe 51a and the second pipe 51b has a soft portion 53 that is softer than the third pipe 51c. That is, the second pipe 51b has a flexible pipe portion. The soft portion 53 is provided, for example, on the upper (first pipe 51a) side of the vertical half position of the second pipe 51b. In other words, the soft portion 53 is provided at a portion where the wash water flowing from the first pipe 51a collides with the second pipe 51b.

[0065] The second pipe 51b is deformed outward by the soft portion 53 being pressed by the cleaning water. This expands the inside of the second pipe 51b, so that waste can be efficiently flushed away. The soft portion 53 can absorb the construction error when connecting the drain outlet 25 and the drain pipe 105 with the drain socket 50, and can connect the drain socket 50 to the drain outlet 25 and the drain pipe 105. The first pipe 51a and the second pipe 51b may both have a soft portion. The first pipe 51a and the second pipe 51b may be entirely made of a soft portion. The soft portion 53 may be provided as necessary. That is, the pipe 51 does not have to have such flexibility that all of the first to fourth pipes 51a to 51d are deformed by being pressed by the cleaning water.

[0066] The third pipe 51c is located downstream of the second pipe 51c, and has an axial direction 52c with a downward diagonal forward vector. The pipe 51 is designed so that the flow of the flush water is not restricted by making the axial direction 52c of the third pipe 51c downward diagonal forward. Even if the flow rate of the flush water weakens in the third pipe 51c, the waste flows toward the fourth pipe 51d due to its own weight. This allows the pipe 51 to efficiently drain the flush water and waste from the third pipe 51c through the fourth pipe 51d to the drain pipe 105.

[0067] The fourth pipe 51d is located downstream of the third pipe 51c, and the axial direction 52d has at least a downward vector. The lower end side of the fourth pipe 51d is connected to the drain pipe 105 extending in the vertical direction. The third pipe 51c and the fourth pipe 51d are harder than the second pipe 51b. That is, the third pipe 51c and the fourth pipe 51d do not have the flexibility to be deformed by being pressed by the wash water.

[0068] The drain socket 50 according to the third embodiment has the same action and effect as the drain socket 30 according to the first embodiment. In the drain socket 50, the third pipe 51c has a vector that faces diagonally downward. This allows the waste to flow smoothly from the third pipe 51c to the fourth pipe 51d due to the flow speed of the flush water and its own weight.

[0069] Furthermore, the pipe 51 of the drain socket 50 has a downward vector in all of the axial directions 52a-52d of the first to fourth flow paths 51a-51d, which enables the pipe 51 to efficiently drain the waste matter into the drain pipe 105 by the flow rate of the flush water and its own weight.

[0070] Next, a drain socket 60 according to a fourth embodiment of the present invention will be described with reference to Fig. 12. In the fourth embodiment, the same components as those in the drain socket and toilet stem according to the first and third embodiments are given the same reference numerals, and their description will be omitted. FIG. 12 is a cross-sectional view showing a drainage socket according to a fourth embodiment of the present invention.

[0071] The drain socket 60 has the first to fourth pipes 51a to 51d. In this case, the third pipe 51c has a curved surface 62 protruding outward at the rear. Specifically, the rear surface of the third pipe 51c has a first extending surface portion 61 extending from the second pipe 51b, a curved surface 62 connected to the first extending surface portion 61, and a second extending surface portion 63 extending from the curved surface 62 toward the fourth pipe 51d. The first extending surface portion 61 extends linearly from the rear surface of the second pipe 51b. The curved surface 62 is formed such that the first extending surface portion 61, which is curved in the up-down direction, is shorter than the second extending surface portion 63. That is, the curved surface 62 is located closer to the second pipe 51b. The curved surface 62 widens the inner diameter of the third pipe 51c.

[0072] The third pipe 51c has a curved surface 65 protruding outward in front. Specifically, the front surface of the third pipe 51c has a third extending surface portion 64 extending from the second pipe 51b, a curved surface 65 connected to the third extending surface portion 64, and a fourth extending surface portion 66 extending from the curved surface portion 65 toward the fourth pipe 51d. The third extending surface portion 64 extends parallel to the second extending surface portion 63. The fourth extending surface portion 66 extends parallel to the first extending surface portion 61. The curved surface 65 is curved in the up-down direction. The third pipe 51 has an inner diameter wider due to the curved surface 62 and the curved surface 65.

[0073] The drain socket 60 according to the fourth embodiment has the same action and effect as the drain socket 30 according to the first embodiment. In the drain socket 60, the third pipe 51c has a vector that faces diagonally downward. This allows the waste to flow smoothly from the third pipe 51c to the fourth pipe 51d due to the flow speed of the flush water and its own weight. In addition, the drain socket 60 allows the direction of the waste to easily change due to the curved surfaces 62, 65 of the third pipe 51c. Therefore, the drain socket 60 can efficiently flow the waste from the first pipe 51a to the fourth pipe 51d.

[0074] Next, a drain socket 70 according to a fifth embodiment of the present invention will be described with reference to Fig. 13. In the fifth embodiment, the same components as those in the drain socket and toilet stem according to the first and third embodiments are given the same reference numerals, and their description will be omitted. FIG. 13 is a cross-sectional view showing a drainage socket according to a fifth embodiment of the present invention.

[0075] The drain socket 70 has first to fourth pipelines 51a to 51d. In this case, the third pipeline 51c has a curved surface 71 whose entire front surface protrudes outward. The curved surface 71 is curved in the up-down direction. Even in this case, the inner diameter of the third pipeline 51c can be made large.

[0076] The drain socket 70 according to the fifth embodiment has the same action and effect as the drain socket 30 according to the first embodiment. In the drain socket 70, the third pipe 51c has a vector that faces diagonally downward. This allows the waste to flow smoothly from the third pipe 51c to the fourth pipe 51d due to the flow speed of the flush water and its own weight. In addition, the curved surface 71 of the third pipe 51c of the drain socket 70 makes it easier for the waste to change direction. Therefore, the drain socket 70 can efficiently flow the waste from the first pipe 51a to the fourth pipe 51d.

[0077] Next, a drain socket 80 according to a sixth embodiment of the present invention will be described with reference to Fig. 14. In the sixth embodiment, the same components as those in the drain socket and toilet stem according to the first embodiment are given the same reference numerals, and their description will be omitted. FIG. 14 is a cross-sectional view showing a drainage socket according to a sixth embodiment of the present invention.

[0078] The drain socket 80 has first to fourth pipelines 31a to 31d. In the drain socket 80, the inclination of the axial direction 32c of the third pipeline 31c is greater than the inclination of the axial direction 32c of the third pipeline 31c according to the first embodiment. That is, the axial direction 32c of the drain socket 80 has a larger downward vector than the axial direction 32c according to the first embodiment.

[0079] The drain socket 80 according to the sixth embodiment has the same action and effect as the drain socket 30 according to the first embodiment. The drain socket 80 makes the downward vector of the diagonally downward vector of the third pipe 31c as large as possible. This makes it easier to flow waste from the second pipe 32b to the third pipe 32c. Furthermore, the waste flows smoothly from the third pipe 31c to the fourth pipe 31d due to the flow rate of the flush water and its own weight. Therefore, the drain socket 80 can efficiently flow waste from the first pipe 31a to the fourth pipe 31d.

[0080] In the above-mentioned first and second embodiments, the drain sockets 30, 40 are fixed by screwing the flange 34 to the floor F. However, the present invention is not limited to this aspect, and for example, the drain sockets 30, 40 may be attached to the drain pipe 105, like the drain socket 50 according to the third embodiment. Furthermore, the drain sockets 50, 60, 70 according to the third to fifth embodiments may be attached to the floor F, like the drain socket 30 according to the first embodiment.

[0081] In the above-mentioned third embodiment, at least the second pipe 51b of the first pipe 51a and the second pipe 51b has a soft portion 53 softer than the third pipe 51c. However, the third pipe 51c and the fourth pipe 51d may be softer than the first pipe 51a and the second pipe 51b. By making the third pipe 51c and the fourth pipe 51d soft, it is possible to absorb construction errors when connecting the drain outlet 25 and the drain pipe 105 with the drain socket 50. This is the same for the fourth and fifth embodiments.

[0082] The embodiment may include the following features. (Configuration 1) A drain socket equipped with a pipe that connects a drain outlet provided in a toilet bowl and opening toward the rear and a drain pipe provided in a floor, The pipeline is A first pipe located downstream of the drain outlet and having an axial direction having at least a backward vector; a second conduit located downstream of the first conduit, the second conduit having an axial direction with at least a downward vector; a third pipe located downstream of the second pipe and having an axial direction with a downward oblique forward vector; a fourth pipe located downstream of the third pipe and having an axial direction with at least a downward vector; A drainage socket comprising: (Configuration 2) The drain socket of configuration 1, wherein the second conduit has a curved surface at the rear that protrudes outward and has a forward vector in addition to the downward vector. (Configuration 3) The drain socket according to configuration 1, wherein at least the second pipe of the first pipe and the second pipe has a soft portion that is softer than the third pipe. (Configuration 4) The drain socket according to configuration 1, wherein the third pipe has a curved surface protruding outward at the rear. (Configuration 5) 2. The drain socket according to claim 1, wherein a front end of the fourth pipeline is located forward of the drain outlet. (Configuration 6) The toilet bowl; The drain socket according to any one of configurations 1 to 5; A toilet system equipped with (Configuration 7) Further comprising a cabinet located behind the toilet bowl, The toilet is attached to the cabinet with a gap formed between the toilet and the floor, The drain socket is A first portion that is housed inside the cabinet; a second portion located outside the cabinet in the gap; 7. The toilet system according to claim 6, further comprising: (Configuration 8) Further comprising a drain pipe disposed below the upper surface of the floor; 8. The toilet system of claim 6 or 7, wherein the drain socket is connected to the drain pipe.

[0083] The above describes the embodiments of the present invention. However, the present invention is not limited to these descriptions. Regarding the above-mentioned embodiments, those in which a person skilled in the art makes appropriate design changes are also included in the scope of the present invention as long as they have the features of the present invention. For example, the shape, dimensions, material, arrangement, installation form, etc. of each element of the drain socket and toilet system are not limited to those exemplified and can be appropriately changed. In addition, each element of each of the above-mentioned embodiments can be combined to the extent technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention. [Explanation of symbols]

[0084] 1. Toilet System 10 Cabinet 11 Front part 11a opening 11a1 1st opening 11a2 2nd opening 12 Left and right side sections 15 Supply pipeline 20 Toilet bowl 20a top surface 21 Bowl section 21a bottom 23 Supply port 25 Drain 30 Drain Socket 30a Part 1 30b 2nd part 31 Pipeline 31a 1st pipeline 31a1 Curved surface 31b 2nd pipeline 31b1 Curved surface 31c 3rd pipeline 31c1 front end 31d 4th pipeline 31d1 front end 32a~32d Axial direction 33 Soft part 34 Flange 40 Drain Socket 41 1st extension surface section 42 Curved Surface 43 Second extension surface section 50 Drain Socket 51 Pipeline 51a 1st pipeline 51a1 Curved surface 51b 2nd pipeline 51c 3rd pipeline 51d 4th pipeline 52a~52d Axial direction 53 Soft part 60 Drain Socket 61 1st extension surface section 62 Curved Surface 63 Second extension surface section 64 Third extension surface section 65 Curved Surface 66 4th extension surface section 70 Drainage socket 71 Curved Surface 80 Drain Socket 100 Drain pipe 105 Drain pipe 110 Cover 200 Filth F floor S Gap W Wall

Claims

1. A drain socket equipped with a pipe that connects a drain outlet provided in a toilet bowl and opening toward the rear and a drain pipe provided in a floor, The pipeline is A first pipe located downstream of the drain outlet and having an axial direction having at least a backward vector; a second pipe located downstream of the first pipe and having an axial direction with at least a downward vector; a third pipe located downstream of the second pipe and having an axial direction with a downward oblique forward vector; a fourth pipe located downstream of the third pipe and having an axial direction with at least a downward vector; A drainage socket comprising:

2. 2. The drain socket of claim 1, wherein the second conduit has a curved surface at its rear that protrudes outward and has a forward vector in addition to the downward vector.

3. The drain socket according to claim 1 , wherein at least the second pipe of the first pipe and the second pipe has a soft portion that is softer than the third pipe.

4. 2. The drain socket according to claim 1, wherein the third pipe has a curved surface protruding outward at a rearward position.

5. 2. The drain socket according to claim 1, wherein a front end of the fourth pipe is located forward of the drain outlet.

6. The toilet bowl; The drain socket according to any one of claims 1 to 5; A toilet system equipped with

7. Further comprising a cabinet located behind the toilet bowl, The toilet is attached to the cabinet with a gap formed between the toilet and the floor, The drain socket is A first portion that is housed inside the cabinet; a second portion located outside the cabinet in the gap; 7. The toilet system according to claim 6, further comprising:

8. Further comprising a drain pipe disposed below the upper surface of the floor; 8. The toilet system according to claim 7, wherein the drain socket is connected to the drain pipe.

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