Drain trap

Abstract

To provide a drain trap capable of effectively preventing backflow into a bathtub drainage inflow port provided at a lower part of a storage space.SOLUTION: The drain trap of the present invention, which includes a storage space into which wash place drainage and bathtub drainage flow, comprises: a wash place drainage inflow port provided at an upper part of the storage space, into which the wash place drainage flows; a bathtub drainage inflow port provided at a lower part of the storage space, into which the bathtub drainage flows; and a drain pipe communicating with the storage space and draining the wash place drainage and the bathtub drainage that have flowed into the storage space. The bathtub drainage inflow port is provided at a position lower than the intermediate position in the height direction of the storage space, and the inner bottom surface of the bathtub drainage inflow port is inclined diagonally downward toward the interior of the storage space.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a drain trap installed in a bathroom or the like. [Background technology]

[0002] 2. Description of the Related Art Drain traps having a storage space into which washing area wastewater and bathtub wastewater flow have conventionally been widely used in bathrooms and the like.

[0003] Generally, a washing area drainage inlet into which washing area drainage flows is provided at the top of the storage space, and a bathtub drainage inlet into which bathtub drainage flows from the bottom of the bathtub via a bathtub drain pipe is provided at the bottom of the storage space. A drain pipe that joins the washing area drainage and the bathtub drainage that flow into the storage space and drains them is connected to the storage space.

[0004] Related patent documents include, for example, Patent Document 1 (JP 2019-94673 A). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2019-94673 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in a conventional drain trap (such as the type described in Patent Document 1), when dirt accumulates in the storage space and washing area wastewater flows in from above, the dirt may flow back into the bathtub wastewater inlet located at the bottom of the storage space (see FIG. 3(b) below). This may cause further problems, such as the dirt itself flowing back into the bathtub through the bathtub drain pipe.

[0007] The present invention has been invented to solve such problems. The purpose of the present invention is to provide a drain trap that can effectively prevent backflow into the bathtub drain inlet located at the bottom of the storage space. [Means for solving the problem]

[0008] The present invention is a drain trap having a storage space into which washing area wastewater and bathtub wastewater flow, comprising a washing area wastewater inlet provided at the top of the storage space and into which the washing area wastewater flows, a bathtub wastewater inlet provided at the bottom of the storage space and into which the bathtub wastewater flows, and a drain pipe connected to the storage space and for draining the washing area wastewater and the bathtub wastewater that have flowed into the storage space, wherein the bathtub wastewater inlet is provided at a position lower than the middle position in the height direction of the storage space, and the inner bottom surface of the bathtub wastewater inlet is inclined diagonally downward toward the inside of the storage space.

[0009] According to the present invention, since the inner bottom surface of the bathtub drain inlet is inclined diagonally downward toward the inside of the storage space, even if dirt flows back into the bathtub drain inlet, the dirt is encouraged to be discharged again toward the storage space. This can eliminate or reduce the problem of the dirt itself flowing back into the bathtub.

[0010] Preferably, the bathtub drain inlet is formed by a tip of a bathtub drain inlet pipe that protrudes further inward from the side wall that defines the storage space.

[0011] When such an embodiment is adopted, washing area wastewater flowing into the storage space from above can also be directed as desired (e.g., the direction of drainage can be guided) by the bathtub wastewater inlet pipe protruding into the storage space.

[0012] In this case, it is further preferable that the bathtub drain inlet pipe is provided at a predetermined distance from the bottom surface of the storage space.

[0013] When such an embodiment is adopted, for example, when draining the washing area, dirt that has settled on the bottom of the storage space can be effectively prevented from flowing back into the bathtub drain inlet.

[0014] It is also preferable that the outer bottom surface of the bathtub drain inlet pipe is inclined diagonally downward toward the inside of the storage space.

[0015] Even when such an embodiment is adopted, the space between the outer bottom surface near the bathtub drain inlet on the downstream side of the bathtub drain inlet pipe and the bottom surface of the storage space can be made a narrow space in order to maintain the discharge performance (e.g., flow rate) for dirt that has settled on the bottom surface of the storage space, while space can be secured between the outer bottom surface on the upstream side of the bathtub drain inlet pipe and the bottom surface of the storage space, thereby effectively preventing dirt from accumulating in the vicinity of the bathtub drain inlet pipe.

[0016] It is also preferable that the outer upper surface of the bathtub drain inlet pipe is inclined diagonally downward toward the inside of the storage space.

[0017] When this type of configuration is adopted, it is possible to more effectively promote the drainage of washing area drainage that flows into the storage space from above. Therefore, by guiding the water toward the outlet when draining the washing area, it is possible to suppress the generation of turbulence in the storage space, and it is possible to further suppress the backflow of dirt that has settled in the storage space when draining the washing area to the bathtub drain inlet.

[0018] It is also preferable that the inner bottom surface of the bathtub drain inlet pipe near the tip has a gradually increasing downward slope toward the tip.

[0019] When this type of configuration is adopted, even if dirt flows back into the bathtub drain inlet, the dirt is more effectively urged to be discharged back toward the storage space. Also, while maintaining the momentum of the bathtub drain toward the outlet when draining the bathtub, dirt that has settled in the storage space over a wide area can be discharged to the outlet. Effect of the Invention

[0020] According to the present invention, since the inner bottom surface of the bathtub drain inlet is inclined diagonally downward toward the storage space, even if dirt flows back into the bathtub drain inlet, the dirt is encouraged to be discharged again toward the storage space. This can eliminate or reduce the problem of dirt itself flowing back into the bathtub. [Brief description of the drawings]

[0021] [Figure 1] 1 is a schematic cross-sectional view showing a drain trap according to one embodiment of the present invention. [Diagram 2] 1 is a schematic cross-sectional view showing the tip of a bathtub drain inlet pipe of a drain trap of this embodiment. FIG. [Diagram 3] 3A and 3B are schematic diagrams illustrating the action of preventing backflow of dirt in the drain trap of the present embodiment, where Fig. 3(a) is a schematic diagram of the present embodiment and Fig. 3(b) is a schematic diagram of a comparative example. [Figure 4] 4A and 4B are schematic diagrams illustrating the action of preventing accumulation of dirt in the storage space in the drain trap of the present embodiment, where Fig. 4(a) is a schematic diagram of the present embodiment and Fig. 4(b) is a schematic diagram of a comparative example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Fig. 1 is a schematic cross-sectional view showing a drain trap 1 according to an embodiment of the present invention, and Fig. 2 is a schematic cross-sectional view showing a tip of a bathtub drain inlet pipe 25 of the drain trap 1 of this embodiment. Fig. 3 is a schematic diagram explaining the action of preventing backflow of dirt in the drain trap 1 of this embodiment, Fig. 3(a) is a schematic diagram of this embodiment, Fig. 3(b) is a schematic diagram of a comparative example, and Fig. 4 is a schematic diagram explaining the action of preventing accumulation of dirt in the storage space in the drain trap 1 of this embodiment, Fig. 4(a) is a schematic diagram of this embodiment, and Fig. 4(b) is a schematic diagram of the comparative example.

[0023] (Basic configuration) As shown in Figure 1, the drain trap 1 of this embodiment is a drain trap installed on the floor surface F of the washing area of ​​a bathroom, and is configured to discharge the washing area wastewater flowing onto the floor surface F and the bathtub wastewater from the bottom of the bathtub (not shown) into the drain pipe 30, while also sealing the drain pipe 30.

[0024] The drain trap 1 comprises a seal water storage member 2 and a cylindrical member 4 detachably fixed to the inside of the seal water storage member 2. The cylindrical member 4 defines a storage space 4a, into which the washing area wastewater and the bathtub wastewater flow. That is, in the present invention, the cylindrical member 4 functions as the storage space 4a.

[0025] The storage space 4a only needs to have a configuration that allows the washing area wastewater and the bathtub wastewater to flow into the storage space 4a, and may be, for example, a storage section that is made up of a bottom wall surface and a peripheral wall surface.

[0026] The cylindrical member 4 is installed at a washing area drain opening provided on the floor surface F of the bathroom washing area, and the washing area drainage flows into the storage space 4a from above the cylindrical member 4. In other words, the washing area drainage inlet is provided at a position higher than the middle position of the storage space in the height (up-down) direction.

[0027] In addition, the cylindrical member 4 has a bathtub drain inlet at a position lower than the upper end of the bathtub drain pipe 20, and the bathtub drain flows into the storage space 4a from below the cylindrical member 4. In other words, the bathtub drain inlet is provided at a position lower than the middle position of the storage space in the height (up-down) direction.

[0028] More specifically, the washing area drainage flows in through a washing area drainage inlet provided at the top of the storage space 4a (specifically, at a height exceeding 1 / 2 the height of the storage space 4a), while the bathtub drainage flows from the bottom of the bathroom, via the bathtub drain pipe 20, into a bathtub drainage inlet (the tip of the bathtub drainage inlet pipe 25 described later) provided at the bottom of the storage space 4a (specifically, at a height less than 1 / 2 the height of the storage space 4a).

[0029] Furthermore, the seal water storage member 2 has a lower body member 6, an upper body member 8 attached to the upper side of the lower body member 6, and an opening member 10 attached to a floor surface F and connecting the floor surface F and the upper body member 8. Furthermore, the opening member 10 is fixed to the upper body member 8 by an annular fastening flange member 12.

[0030] The lower main body member 6 is a member that constitutes the lower part of the seal water storage member 2, and is provided with a seal water recess 6a in which seal water accumulates, and a trap portion 6b for determining the water level of the seal water accumulated in the seal water storage member 2. The seal water recess 6a is a recess configured to accumulate wastewater that has flowed into the drain trap 1, and its bottom surface is linearly inclined so as to become higher toward the trap portion 6b. Therefore, when the water level in the seal water recess 6a exceeds the height of the trap portion 6b, the wastewater in the seal water recess 6a flows out into the drain pipe 30. Therefore, the water level of the seal water in the seal water storage member 2 is determined to a predetermined water level WL by the height of the trap portion 6b.

[0031] The upper body member 8 is a member that is attached to the upper side of the lower body member 6 and is integrated with it, and is disposed so as to cover the upper side of the water-sealing recess 6a. One end of the upper body member 8 is formed with a receiving tubular portion 8a configured to receive the lower portion of the tubular member 4, and the other end is provided with a drain pipe connection portion 8b for connecting the drain pipe 30.

[0032] The receiving tube portion 8a is a cylindrical portion with a circular cross section that opens upward and is formed to receive the cylindrical member 4 inside. The receiving tube portion 8a is configured as a stepped tube with a small inner diameter at the bottom and a large inner diameter at the top, and is configured so that the lower part of the cylindrical member 4 is fitted into the lower part. The drain pipe connection portion 8b is a cylindrical portion provided on the downstream side of the trap portion 6b, and is configured to receive and connect the drain pipe 30 oriented horizontally. The lower end of the drain pipe connection portion 8b is formed at a position lower than the trap portion 6b, and is configured so that when the water level in the seal water storage member 2 exceeds the height of the trap portion 6b, wastewater flows into the drain pipe connection portion 8b.

[0033] The opening member 10 is a shallow cup-shaped member arranged to smoothly connect the floor surface F of the washing area and the receiving tubular portion 8a of the upper main body member 8. A circular opening 10a for receiving the tubular member 4 is provided approximately in the center of the opening member 10. The opening member 10 is fixed to the upper main body member 8 by a fastening flange member 12.

[0034] The tubular member 4 is a tubular member that is detachably fixed to the inside of the seal water storage member 2 so that the lower end is submerged in the seal water stored in the seal water storage member 2. The tubular member 4 has a cylindrical portion and a flange portion that is formed to smoothly connect to the upper end of the cylindrical portion and that spreads upward in a cone shape. Furthermore, as shown in Fig. 1, a basket-shaped hair catcher 14 is disposed inside the flange portion 4b and is configured to capture hair and the like that flows into the drain trap 1 together with the drainage water.

[0035] In addition, the tubular member 4 is inserted into the receiving tubular portion 8a of the seal water storage member 2 so that the lower part of the cylindrical portion is submerged in the seal water stored in the seal water storage member 2, and the lower end of the cylindrical portion extends to the bottom surface of the seal water recess 6a of the lower main body member 6.

[0036] As shown in Fig. 1, a notch 4c is formed at the lower end of the cylindrical portion of the tubular member 4. This notch 4c forms a gap between the lower end of the cylindrical portion and the bottom surface of the water-sealing recess 6a into which a finger can be inserted. The notch 4c at the lower end of the cylindrical portion also determines the minimum level of the sealing water depth in the seal water storage member 2 at which the drain trap 1 can be water-sealed. That is, when the depth of the sealing water stored in the seal water storage member 2 is equal to or greater than the upper end of the notch 4c, the drain trap 1 is sealed. Therefore, the upper end of the notch 4c also functions as a dip that determines the sealing water depth of the drain trap 1.

[0037] (Characteristic composition) In this embodiment, the bathtub drain inlet is formed by the tip of the bathtub drain inlet pipe 25 that protrudes further inward from the side wall that defines the storage space 4a.

[0038] Specifically, bathtub drain inlet pipe 25 protrudes in a triangular shape in a planar view, and referring to FIG. 4(a), for example, length l1 = 20 to 60 mm, length l2 = 10 to 50 mm, angle θ1 (protruding direction angle with respect to the tangent to the cylindrical side wall of storage space 4a) = 45 to 105°, angle θ2 (protruding direction angle with respect to the tangent to the cylindrical side wall of storage space 4a) = 60 to 120°, and angle θ3 = 40 to 100°.

[0039] The bathtub drain inlet (the opening of the bathtub drain inlet pipe 25) is provided on the end face on the side of length l1 in plan view. In this embodiment, the end face is inclined at 1 to 30 degrees with respect to the vertical plane, as shown in Figures 1, 2, and 3(a). The height of the end face measured along the end face is 5 to 30 mm (the height of the end face measured along the vertical plane is 4 to 30 mm). The bathtub drain inlet (the opening of the bathtub drain inlet pipe 25) is formed as a substantially rectangular opening of 5 to 30 mm x 19 to 59 mm within the end face (the thickness of the bathtub drain inlet pipe 25 is approximately 1 to 3 mm).

[0040] The shape of the opening may be such that, for example, the upper and lower corners on the inside (the side of angle θ3 in FIG. 4(a)) are rounded, or the upper and lower rounded corners may be connected to form a single semicircle.

[0041] Specifically, as shown in FIG. 2, inner bottom surface 25i of bathtub drain inlet pipe 25 (i.e., the inner bottom surface of the bathtub drain inlet) is inclined diagonally downward from the bathtub drain pipe 20 side toward the inside of storage space 4a, outer bottom surface 25b of bathtub drain inlet pipe 25 is also inclined diagonally downward at a similar angle from the bathtub drain pipe 20 side toward the inside of storage space 4a, and outer upper surface 25t of bathtub drain inlet pipe 25 is also inclined diagonally downward at a similar angle from the bathtub drain pipe 20 side toward the inside of storage space 4a.

[0042] Furthermore, as shown in FIG. 2, the inner bottom surface 25i near the tip of the bathtub drain inlet pipe 25 of this embodiment is rounded (for example, R=0.5 to 5.0), and the degree of downward inclination gradually increases toward the tip.

[0043] In the present invention, the degree of inclination refers to a configuration in which, when comparing the degree of inclination formed by the upstream tangent and the horizontal plane at any one point upstream of the bathtub drain inlet pipe 25 with the degree of inclination formed by the downstream tangent and the horizontal plane at any one point downstream of the bathtub drain inlet pipe 25, the degree of inclination formed by the downstream tangent and the horizontal plane is greater.

[0044] In this embodiment, the shape of the inner bottom surface 25i near the tip of the bathtub drain inlet pipe 25 is curved, but if it is a combination of two or more straight lines, the inclination of any two points may be compared. In other words, the shape of the inner bottom surface 25i near the tip of the bathtub drain inlet pipe 25 may be curved or may be composed of two or more straight lines.

[0045] As shown in Figs. 1 and 3(a), the bathtub drain inlet pipe 25 of this embodiment is provided with a predetermined gap (for example, about 0.5 mm to 5 mm) from the bottom surface of the storage space 4a.

[0046] (Action and effect) According to the drain trap 1 of this embodiment, the inner bottom surface of the bathtub drain inlet (the inner bottom surface 25i of the bathtub drain inlet pipe 25) is inclined diagonally downward toward the inside of the storage space 4a, so even if dirt flows back into the bathtub drain inlet, the dirt is encouraged to be discharged again toward the storage space 4a (see FIG. 3). This can eliminate or reduce problems such as the dirt itself flowing back into the bathtub.

[0047] In addition, according to the drain trap 1 of this embodiment, the bathtub drain inlet is formed by the tip of the bathtub drain inlet pipe 25 that protrudes further inward from the side wall that defines the storage space 4a, so that washing area drainage flowing into the storage space 4a from above can also be directed as desired (for example, the drainage direction can be guided) by the bathtub drain inlet pipe 25 that protrudes into the storage space 4a.

[0048] In addition, according to the drain trap 1 of this embodiment, the bathtub drain inlet pipe 25 is arranged at a predetermined distance from the bottom surface of the storage space 4a, so that dirt that has settled near the bathtub drain inlet pipe 25 can be effectively prevented from flowing back into the bathtub drain inlet.

[0049] In addition, according to the drain trap 1 of this embodiment, the outer bottom surface 25b of the bathtub drain inlet pipe 25 is inclined diagonally downward toward the inside of the storage space 4a, so that the space between the outer bottom surface near the bathtub drain inlet on the downstream side of the bathtub drain inlet pipe 25 and the bottom surface of the storage space 4a can be made a narrow space in order to maintain the discharge performance (e.g., flow rate) for dirt that has settled on the bottom surface of the storage space 4a, while space can be secured between the outer bottom surface on the upstream side of the bathtub drain inlet pipe 25 and the bottom surface of the storage space 4a, thereby effectively preventing dirt from accumulating in the vicinity of the bathtub drain inlet pipe 25.

[0050] In addition, according to the drain trap 1 of this embodiment, the outer upper surface 25t of the bathtub drain inlet pipe 25 is inclined obliquely downward toward the storage space 4a, so that the washing area drainage flowing into the storage space 4a from above can be more effectively drained. Therefore, by guiding the water toward the outlet when draining the washing area, it is possible to suppress the generation of turbulence in the storage space 4a, and it is possible to further suppress the backflow of dirt that has settled in the storage space 4a to the bathtub drainage inlet when draining the washing area.

[0051] In addition, according to the drain trap 1 of this embodiment, the inner bottom surface 25i near the tip of the bathtub drain inlet pipe 25 gradually increases in the downward inclination toward the tip, so that even if dirt flows back into the bathtub drain inlet pipe 25, the dirt is more effectively encouraged to be discharged again toward the storage space 4a. In addition, while maintaining the momentum of the bathtub drain toward the outlet when draining the bathtub, dirt that has settled in the storage space 4a over a wide area can be discharged to the outlet.

[0052] In addition, according to the drain trap 1 of this embodiment, as shown in Fig. 4, the bathtub drain flowing into the storage space 4a from the bathtub drain inlet pipe 25 can spread more effectively by hitting the bottom surface of the storage space 4a. This makes it possible to effectively prevent the accumulation of dirt on the bottom surface of the storage space 4a, compared to a conventional type of bathtub drain inlet pipe (nozzle) that does not have an incline.

[0053] In addition, when injection molding is used to form the bathtub drain inlet pipe 25 in an inclined state, it is somewhat difficult to manufacture a mold. However, the inventors of the present invention are convinced that the effects and advantages obtained by the present invention outweigh the difficulties, and therefore the present invention is disclosed as a patent application.

[0054] (Modification) The features of the present invention are not limited to drain traps based on the basic configuration described above, but can be applied to drain traps based on various basic configurations.

[0055] For example, the present invention can also be applied to a basic configuration in which bathtub wastewater is divided into two wastewater streams by a diversion section, only one of which is allowed to flow into the storage space 4a, and the other is allowed to merge with the drain pipe 30 without passing through the storage space 4a.

[0056] The present invention includes the following features (inventions). [Feature 1] A drain trap having a storage space into which washing area drainage and bathtub drainage flow, A washing area drainage inlet provided at an upper portion of the storage space, into which the washing area drainage flows; A bathtub drainage inlet provided at a lower portion of the storage space, into which the bathtub drainage flows; A drain pipe connected to the storage space for draining the washing area drainage and the bathtub drainage that flow into the storage space; Equipped with The bathtub drain inlet is provided at a position lower than the middle position in the height direction of the storage space, The inner bottom surface of the bathtub drain inlet is inclined obliquely downward toward the inside of the storage space. A drain trap characterized by: [Feature 2] The bathtub drain inlet is formed by a tip of a bathtub drain inlet pipe that protrudes further inward from a side wall that defines the storage space. 2. The drain trap according to feature 1. [Feature 3] The bathtub drain inlet pipe is provided at a predetermined distance from the bottom surface of the storage space. 3. The drain trap according to feature 2. [Feature 4] The outer bottom surface of the bathtub drain inlet pipe is inclined obliquely downward toward the inside of the storage space. 4. The drain trap according to claim 2 or 3. [Feature 5] The outer upper surface of the bathtub drain inlet pipe is inclined obliquely downward toward the inside of the storage space. 5. A drain trap according to claim 2, wherein the drain trap is a water trap. [Feature 6] The inner bottom surface of the bathtub drain inlet pipe near the tip has a gradually increasing downward inclination toward the tip. 6. A drain trap according to any one of claims 2 to 5. [Explanation of symbols]

[0057] 1 Drain Trap 2. Sealing water storage material 4 Cylindrical member 4a Storage space 4c Notch 6 Lower body member 6a Water sealing recess 6b Trap section 8 Upper Body Member 8a Receiving tube part 8b Drain pipe connection 10 Opening material 10a opening 12 Fastening flange member 14 Hair Catcher 20 Bathtub drain pipe 25 Bathtub drain inlet pipe 25b Outer bottom surface 25i inner bottom 25t outer top surface 30 Drain pipe

Claims

1. A drain trap having a storage space into which washing area drainage and bathtub drainage flow, A washing area drainage inlet provided at an upper portion of the storage space, into which the washing area drainage flows; A bathtub drainage inlet provided at a lower portion of the storage space, into which the bathtub drainage flows; A drain pipe connected to the storage space for draining the washing area drainage and the bathtub drainage that flow into the storage space; Equipped with The bathtub drain inlet is provided at a position lower than the middle position in the height direction of the storage space, The inner bottom surface of the bathtub drain inlet is inclined obliquely downward toward the inside of the storage space. A drain trap characterized by:

2. The bathtub drain inlet is formed by a tip of a bathtub drain inlet pipe that protrudes further inward from a side wall that defines the storage space.

2. The drain trap according to claim 1.

3. The bathtub drain inlet pipe is provided at a predetermined distance from the bottom surface of the storage space.

3. The drain trap according to claim 2.

4. The outer bottom surface of the bathtub drain inlet pipe is inclined obliquely downward toward the inside of the storage space.

4. The drain trap according to claim 2 or 3.

5. The outer upper surface of the bathtub drain inlet pipe is inclined obliquely downward toward the inside of the storage space.

4. The drain trap according to claim 2 or 3.

6. The inner bottom surface of the bathtub drain inlet pipe near the tip has a gradually increasing downward inclination toward the tip.

4. The drain trap according to claim 2 or 3.

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