Bathroom drain trap

Abstract

To provide a bathroom drain trap that can be miniaturized while sufficiently suppressing the accumulation of dirt.SOLUTION: A bathroom drain trap (1) comprises: a bathtub water receiving section (6); a washing area water receiving section (10); a drain pipe connection section (8) to which a drain pipe is connected; a bathtub water passage (22) connecting the bathtub water receiving section and the drain pipe connection section; a bathtub water storage chamber (26); and a dip section (28a) defining the minimum water level allowing sealing in the bathtub water storage chamber. The bathtub water receiving section, washing area water receiving section, and drain pipe connection section are arranged in a straight line in this order. The dip section is formed as the upper edge of the dip passage cross-section (28) located between the bathtub water receiving section and the washing area water receiving section in the bathtub water passage. A portion (p2) of a projection line projecting this dip passage cross-section toward the drain pipe connection section extends, in plan view, beyond the center (C) of the washing area water receiving section to the side of the drain pipe connection section without being blocked by the inner wall of the bathtub water passage.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a bathroom drain trap, and more particularly to a bathroom drain trap that receives drainage water from a bathtub and a washing area and directs it into a drain pipe. [Background technology]

[0002] Japanese Patent Publication No. 6060327 (Patent Document 1) describes a drain trap. This drain trap is configured so that wastewater from the bathtub and the bathroom's washing area each flow into a main body, where they merge and are discharged into a sewer pipe through a single outlet. The drain trap described in Patent Document 1 also has a drain outlet into which wastewater from the bathtub flows, a drain outlet into which wastewater from the washing area flows, and an outlet to which a drain pipe is connected, all arranged in that order in a row. Therefore, wastewater from the bathtub passes through the section containing the drain outlet into which wastewater from the washing area flows before reaching the outlet. Furthermore, a backflow prevention wall is provided within the main body of the drain trap between the bathtub drain outlet and the washing area drain outlet, preventing wastewater from the bathtub from backflowing into the washing area drain outlet and vice versa. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6060327 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the drain trap described in Patent Document 1, the wastewater from the bathtub flows around the backflow prevention wall and the bowl section that surrounds the drain outlet for the washing area before reaching the outlet. That is, the wastewater from the bathtub hits the outer surface of the bowl section and the backflow prevention wall, flows around them, passes the drain outlet for the washing area, and is discharged from the outlet. This causes problems, such as the flow rate of the wastewater from the bathtub decreasing when it hits the bowl section or the like, or stagnation occurs, making it easy for dirt to accumulate in those areas.

[0005] Furthermore, if the drain trap is configured so that the water from the bathtub reaches the outlet without bypassing the wash area drain, the drain trap will have to be large. Because various pipes run under the floor of the bathroom where the drain trap is to be installed, if the drain trap is too large, it may interfere with the pipes under the floor, making it impossible to install the drain trap. In particular, when installing a drain trap during bathroom renovations, a large drain trap may make it difficult to replace the existing drain trap.

[0006] Therefore, an object of the present invention is to provide a bathroom drain trap that can be made compact while sufficiently suppressing the accumulation of dirt. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the present invention provides a bathroom drain trap that receives drainage water from a bathtub and a washing area and discharges it into a drain pipe, and includes a bathtub water receiving section into which drainage water from the bathtub flows, a washing area water receiving section into which drainage water from the washing area flows, a drain pipe connection section to which drain pipes for discharging the drainage water from the bathtub and the washing area are connected, a bathtub water flow path that connects the bathtub water receiving section and the drain pipe connection section, a bathtub water chamber that collects the drainage water that flows in from the bathtub water receiving section, and a bathtub water chamber that can be water-sealed by this bathtub water chamber. The bathtub water receiving section, the washing area water receiving section, and the drain pipe connection section are arranged in a row in this order, and the dip section is configured as the upper edge of the dip flow path cross section located between the bathtub water receiving section and the washing area water receiving section of the bathtub water flow path, and a portion of the projection line of this dip flow path cross section projected toward the drain pipe connection section is not obstructed by the inner wall surface of the bathtub water flow path when viewed from above, and extends beyond the center of the washing area water receiving section to the side of the drain pipe connection section.

[0008] According to the present invention, the bathtub water receiving section, washing area water receiving section, and drain pipe connection section are arranged in a line, allowing for a more compact bathroom drain trap. Furthermore, according to the present invention, a portion of the projection line of the dip flow path cross section toward the drain pipe connection section is not obstructed by the inner wall surface of the bathtub water flow path in a top view, and extends beyond the center of the washing area water receiving section to the drain pipe connection section. Therefore, a portion of the wastewater that passes through the dip flow path cross section can flow beyond the washing area water receiving section to the drain pipe connection section without colliding with the inner wall surface of the bathtub water flow path, maintaining a sufficiently high flow rate of the wastewater and preventing dirt from adhering.

[0009] In the present invention, the bathtub water flow path extending from the dip portion to the drain pipe connection portion preferably passes through one side of the washing area water receiving portion when viewed from above and is connected to the drain pipe connection portion.

[0010] According to the present invention configured in this manner, the bathtub water flow path, when viewed from above, passes through one side of the washing area water receiving section and is connected to the drain pipe connection section, so that a larger flow path cross-sectional area of ​​the bathtub water flow path can be ensured compared to when it passes through both sides of the washing area water receiving section, the flow rate of the drainage water flowing through the bathtub water flow path can be maintained high, and the adhesion of dirt can be suppressed.

[0011] In the present invention, the bathtub water flow path is preferably formed so that the dip flow path cross section is horizontally elongated, while the side flow path cross section on the side of the washing area water receiving section is vertically elongated.

[0012] According to the present invention, the bathtub water flow path has a horizontally elongated cross section at the dip flow path cross section, which allows the dip section to be located at a low position while ensuring a sufficient dip flow path cross section, thereby ensuring a sufficient water seal depth. Also, the bathtub water flow path has a vertically elongated cross section at the side flow path cross section on the side of the washing area water receiving section, which allows the width of the bathtub water flow path to be narrowed while ensuring a large side flow path cross section, and the width of the bathroom drain trap can be made small.

[0013] In the present invention, the bathtub water flow path is preferably configured such that the flow path width gradually decreases while the flow path height gradually increases from the dip flow path cross section toward the side flow path cross section.

[0014] According to the present invention, the bathwater flow path is designed so that the width gradually decreases while the height gradually increases from the dip flow path cross section to the side flow path cross section, allowing the wastewater that passes through the dip flow path cross section to be smoothly guided and reach the side flow path cross section without a significant decrease in flow rate. This allows the flow rate of the wastewater flowing through the bathwater flow path to be maintained high and prevents dirt from adhering.

[0015] In the present invention, the bathtub water flow path is preferably configured so that the flow path height gradually decreases from the bathtub water receiving portion toward the dip flow path cross section.

[0016] According to the present invention, the bathtub water flow path is configured so that its height gradually decreases from the bathtub water receiving section toward the dip flow path cross section, allowing for a smaller bathroom drain trap height while suppressing a decrease in the flow rate of the wastewater. Furthermore, by increasing the flow rate of the wastewater passing through the dip flow path cross section, the flow rate of the wastewater toward the drain pipe connection section without being obstructed by the inner wall of the bathtub water flow path increases. As a result, the wastewater near the inner wall of the bathtub water flow path can be entrained in the high-speed flow of wastewater, thereby speeding up the overall flow within the bathtub water flow path. This prevents dirt from adhering to the bathtub water flow path. [Effects of the Invention]

[0017] The bathroom drain trap of the present invention can be made compact while adequately suppressing the accumulation of dirt. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view showing a bathroom drain trap according to an embodiment of the present invention installed in a bathroom. FIG. [Figure 2] 1 is a perspective view showing the entire bathroom drain trap according to an embodiment of the present invention. FIG. [Figure 3] FIG. 1 is a side cross-sectional view of an entire bathroom drain trap according to an embodiment of the present invention. [Figure 4] FIG. 1 is a plan cross-sectional view of a bathroom drain trap according to an embodiment of the present invention. [Figure 5] This is a front cross-sectional view showing the structure of the bathtub water receiving portion of a bathroom drain trap according to an embodiment of the present invention. [Figure 6] 1 is a perspective cross-sectional view showing the structure of a drain pipe connection portion of a bathroom drain trap according to an embodiment of the present invention. [Figure 7] This is a side cross-sectional view showing an enlarged view of the dip flow path cross section and its vicinity in a bathroom drain trap according to an embodiment of the present invention. [Figure 8]This is a plan cross-sectional view showing an enlarged view of the downstream side of the dip flow path cross section in a bathroom drain trap according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] Next, a bathroom drain trap according to an embodiment of the present invention will be described with reference to the accompanying drawings. Fig. 1 is a perspective view showing a bathroom drain trap according to an embodiment of the present invention installed in a bathroom. Fig. 2 is a perspective view showing the entire bathroom drain trap according to an embodiment of the present invention. Fig. 3 is a side cross-sectional view of the entire bathroom drain trap according to an embodiment of the present invention. Fig. 4 is a plan cross-sectional view of a bathroom drain trap according to an embodiment of the present invention. Fig. 5 is a front cross-sectional view showing the structure of a bathtub water receiving section of a bathroom drain trap according to an embodiment of the present invention. Fig. 6 is a perspective cross-sectional view showing the structure of a drain pipe connection section of a bathroom drain trap according to an embodiment of the present invention. Figs. 7 and 8 are plan cross-sectional views showing an enlarged view of the downstream side of the dip flow path cross-section in a bathroom drain trap according to an embodiment of the present invention.

[0020] As shown in Figure 1, bathroom drain trap 1 according to an embodiment of the present invention is installed under the floor of bathroom R, spanning bathtub 2 and washing area 4. One end of bathroom drain trap 1 is provided with bathtub water receiving section 6 that opens upward on the bottom surface 2a of bathtub 2, and the other end is provided with drain pipe connection section 8 to which drain pipe D provided in bathroom R is connected. Furthermore, between bathtub water receiving section 6 of bathroom drain trap 1 and drain pipe connection section 8, washing area water receiving section 10 that opens upward on the floor surface 4a of washing area 4 is provided.

[0021] Therefore, the bathtub water receiving section 6, the washing area water receiving section 10, and the drain pipe connection section 8 are arranged in a row in this order when viewed from above. With this configuration, wastewater from the bathtub 2 flows into the bathtub water receiving section 6, and wastewater from the washing area 4 flows into the washing area water receiving section 10, and these wastewaters are discharged into the drain pipe D connected to the drain pipe connection section 8. In this embodiment, the centers of the bathtub water receiving section 6 and the washing area water receiving section 10 are located on the central axis A (Figure 4) of the drain pipe connection section 8 when viewed from above.

[0022] As shown in Figures 2 and 3, the bathroom drain trap 1 has a main body 12 formed in an overall rectangular parallelepiped shape, with a washing area water receiving section 10 provided above the main body 12. Therefore, wastewater flowing in from the washing area water receiving section 10 flows into the main body 12 from above. An L-shaped pipe 14, bent into an L-shape, is connected to one end of the main body 12, and the bathtub water receiving section 6 is formed at the upper end of the vertical section 14a of the L-shaped pipe 14. Meanwhile, the tip of the horizontal section 14b of the L-shaped pipe 14 is connected to the lower end of one end of the main body 12. Furthermore, an inclined section 12a is provided at the other end of the main body 12, and the bottom surface of this inclined section 12a is inclined so that it rises toward the drain pipe connection section 8.

[0023] In this embodiment, the main body 12 and the drain pipe connection part 8 are composed of a lower member that forms the bottom surface side of the main body 12 and an upper member that forms the ceiling surface side, as shown in Figure 2, and these members are joined together to form an integrated unit. The drain pipe connection part 8 is configured as part of the upper member. However, the main body 12 and the drain pipe connection part 8 can also be configured as an integrated member, or can be configured as separate members different from those described above.

[0024] Bathtub water receiving section 6 is a circular opening that opens upward, and is designed to allow drainage water to flow in from a drain hole provided in the bottom surface 2a of bathtub 2. Bathtub water receiving section 6 also communicates with the flow path inside L-shaped pipe 14. L-shaped pipe 14 has a circular cross section at the upper end of vertical section 14a connected to bathtub water receiving section 6, while horizontal section 14b has a flattened oval cross section.

[0025] The washing area water receiving section 10 is a circular opening that opens upward, allowing wastewater that has flowed onto the floor surface 4a of the washing area 4 to flow in. As shown in Figures 3 and 5, a water storage tank 16 is disposed in the washing area water receiving section 10. The water storage tank 16 is composed of a cylindrical lower section 16a and an inverted cone-shaped upper section 16b that expands upward from the upper end of the lower section 16a. The lower section 16a penetrates the ceiling surface of the main body 12 and communicates with the space inside the main body 12. The upper section 16b is fitted into the floor surface 4a of the washing area 4 and is configured to allow wastewater that has flowed onto the floor surface 4a to flow inward. Therefore, all wastewater received by the washing area water receiving section 10 flows into the water storage tank 16.

[0026] 5, a basket-shaped hair catcher 18 is disposed in the upper portion 16b of the water storage bottle 16 to prevent foreign matter such as hair that has washed onto the floor surface 4a of the washing area 4 from flowing into the bathroom drain trap 1. In this embodiment, the space inside the water storage bottle 16 forms a washing area water storage chamber 20 that stores the washing area water that has flowed in from the washing area water receiving portion 10. In this embodiment, the water storage bottle 16 is configured to be detachable and can be pulled upward from the main body portion 12.

[0027] Next, the structure of the flow path provided inside the bathroom drain trap 1 of this embodiment will be described with reference to FIGS. As shown in Figure 4, the main body 12 of the bathroom drain trap 1 has a bathtub water flow path 22 that guides wastewater flowing in from the bathtub water receiving section 6 to the drain pipe connection section 8, and a washing area water flow path 24 that guides wastewater flowing in from the washing area water receiving section 10 to the drain pipe connection section 8.

[0028] The bathtub water flow path 22 is configured to connect the bathtub water receiving section 6 and the drain pipe connection section 8, and is composed of a flow path inside the L-shaped pipe 14 and a flow path extending longitudinally through the main body 12. The portion of the bathtub water flow path 22 inside the main body 12 functions as a bathtub water chamber 26 that seals the space between the bathtub water receiving section 6 and the drain pipe D. As shown in Figure 7, the tip of the horizontal section 14b of the L-shaped pipe 14 is connected to the upstream end of the main body 12, and the flow path inside the L-shaped pipe 14 is connected to the internal space of the main body 12.

[0029] That is, the flow path in the horizontal portion 14b of the L-shaped pipe 14 is connected to the bathtub water flow path 22 in the main body 12 via the dip flow path cross section 28. In this embodiment, the horizontal portion 14b of the L-shaped pipe 14 has a flattened oval cross section, while the dip flow path cross section 28 is configured as a horizontally elongated rectangle with rounded corners. The upper edge of this dip flow path cross section 28 forms a dip portion 28a, which determines the minimum water level in the bathtub water chamber 26 at which the bathtub water chamber 26 can achieve a water seal. That is, when the water level in the bathtub water chamber 26, located inside the main body 12, is higher than the upper edge of the dip flow path cross section 28, a water seal is formed between the bathtub water receiving portion 6 and the drain pipe D.

[0030] 7, the horizontal portion 14b of the L-shaped pipe 14 is configured so that its downstream end gradually decreases in height toward the dip flow cross section 28. That is, the lower surface of the horizontal portion 14b of the L-shaped pipe 14 is oriented horizontally so as to be continuous with the bottom surface of the main body 12, while the upper surface of the horizontal portion 14b is an inclined surface whose height gradually decreases toward the dip flow cross section 28. Thus, inside the L-shaped pipe 14, the bathwater flow path 22 is configured so that its flow path height gradually decreases from the bathwater receiving portion 6 toward the dip flow cross section 28. This allows the bathwater drain trap 1 to be connected to the low-height dip flow cross section 28 while keeping the height of the bathroom drain trap 1 low, and prevents stagnation and a decrease in flow velocity within the L-shaped pipe 14.

[0031] Furthermore, the main body 12 is provided with an inclined section 12a between the washing area water receiving section 10 and the drain pipe connection section 8, which causes the bathtub water flow path 22 in the main body 12 to be a flow path that rises obliquely downstream toward the drain pipe connection section 8. As shown in Figure 6, the diagonally rising flow path of the bathtub water flow path 22 is highest at the bathtub side overflow section 22a, and downstream of the bathtub side overflow section 22a, the bathtub water flow path 22 descends toward the drain pipe connection section 8.

[0032] In this way, bathtub-side overflow section 22a is located in the bathtub water flow path 22 upstream of drain pipe connection section 8, and is configured to determine the height of the sealed water in bathtub water chamber 26. That is, during normal use of bathroom drain trap 1, wastewater is stored in bathtub water chamber 26 roughly up to the height of bathtub-side overflow section 22a. Even if the water level in bathtub water chamber 26 drops for some reason, if the water level in bathtub water chamber 26 is higher than dip section 28a, the water stored in bathtub water chamber 26 can seal the space between bathtub water receiving section 6 and drain pipe connection section 8. Therefore, the sealed water depth of bathtub water chamber 26 is determined by the difference in elevation between dip section 28a and bathtub-side overflow section 22a.

[0033] As shown in Figure 4, the washing area water flow path 24 is a flow path that connects the washing area water storage chamber 20 and the drain pipe connection part 8. That is, the wastewater that flows into the washing area water receiving part 10 flows into the washing area water storage chamber 20 formed by the water storage bottle 16, and is discharged through the washing area water flow path 24 to the drain pipe connection part 8. Also, as shown in Figure 6, the downstream side of the washing area water flow path 24 is also a flow path that rises obliquely toward the drain pipe connection part 8 due to the inclined part 12a provided in the main body part 12. The obliquely rising flow path of the washing area water flow path 24 is highest at the washing area side overflow part 24a, and downstream of the washing area side overflow part 24a, the washing area water flow path 24 descends toward the drain pipe connection part 8.

[0034] Additionally, bathtub water flow path 22 and washing-area water flow path 24, which are provided on inclined portion 12a inside main body 12, are separated by partition wall 12b provided inside main body 12. That is, bathtub water flow path 22 and washing-area water flow path 24 are formed by providing partition wall 12b inside the chamber of main body 12 into which drainage water from the washing area and the bathtub flows. Bathtub water flow path 22 and washing-area water flow path 24 extend roughly parallel to each other inside main body 12. In this embodiment, bathtub-side overflow section 22a provided in bathtub water flow path 22 and washing-area-side overflow section 24a provided in washing-area water flow path 24 are configured at the same height and are aligned in a straight line when viewed from above.

[0035] 5, the water reservoir 16 is a cylindrical member that extends from near the floor 4a of the washing area 4 to the bottom surface of the main body 12 and forms the washing area water reservoir chamber 20 inside. A notch 16c is provided at the bottom end of the water reservoir 16, and the washing area water reservoir chamber 20 inside the water reservoir 16 is connected to the washing area water flow path 24 via this notch 16c.

[0036] As described above, the washing area-side overflow section 24a is provided in the washing area water flow path 24 upstream of the drain pipe connection section 8, and is configured to determine the height of the sealed water in the washing area water chamber 20. That is, during normal use of the bathroom drain trap 1, wastewater is stored in the washing area water chamber 20 up to approximately the height of the washing area-side overflow section 24a. Even if the water level in the washing area water chamber 20 drops for some reason, the space between the washing area water receiving section 10 and the drain pipe connection section 8 can be sealed by the stored water in the washing area water chamber 20 as long as the water level is higher than the height of the notch 16c (Figure 5) of the water reservoir 16.

[0037] 4, the water reservoir 16 forms part of the wall separating the washing area water reservoir chamber 20 and the bathtub water flow path 22. Furthermore, the upstream end of the partition wall 12b, which is provided between the bathtub water flow path 22 and the washing area water flow path 24, extends to a position where it abuts against the outer circumferential surface of the water reservoir 16. In this way, the water reservoir 16 and the partition wall 12b separate the interior of the main body 12 into a section where the wastewater flowing in from the bathtub water receiver 6 flows and a section where the wastewater flowing in from the washing area water receiver 10 flows.

[0038] Next, as shown in Figure 4, the drain pipe connection 8 is located downstream of the bathtub-side overflow section 22a of the bathtub water flow path 22 and the washing-place-side overflow section 24a of the washing-place water flow path 24. Furthermore, the bathtub water flow path 22 and the washing-place water flow path 24 are configured so that the cross-sectional area of ​​the flow path decreases downstream on the downstream side of each overflow section, and each has a constant cross-sectional area within the drain pipe connection 8. Furthermore, as shown in Figure 6, the flow path from the bathtub-side overflow section 22a to the drain pipe connection 8 and the flow path from the washing-place-side overflow section 24a to the drain pipe connection 8 are both downward-sloping flow paths that slope downward toward the downstream side.

[0039] The drain pipe connection portion 8 has a large diameter portion 8a and a small diameter portion 8b, and is configured to connect a drain pipe D. The large diameter portion 8a is a cylindrical inner wall with a constant cross-sectional area oriented horizontally, and the upstream end of the drain pipe D can be received therein to connect the drain pipe D. The small diameter portion 8b is located upstream of the large diameter portion 8a, and is a cylindrical inner wall with a constant cross-sectional area oriented horizontally, concentric with the large diameter portion 8a. The diameter of the small diameter portion 8b is configured to be approximately the same as the inner diameter of the drain pipe D received in the large diameter portion 8a, allowing a smooth connection between the flow path inside the small diameter portion 8b and the flow path inside the drain pipe D.

[0040] Furthermore, a vertically extending partition wall 8c (Fig. 6) is provided within small diameter portion 8b, dividing the flow path inside drain pipe connection portion 8 into two. That is, the flow path inside drain pipe connection portion 8 is divided by partition wall 8c into bathtub water flow path 22 and washing area water flow path 24. This partition wall 8c is oriented in the flow path inside drain pipe connection portion 8 parallel to the central axis A of drain pipe D connected to drain pipe connection portion 8 (Fig. 4).

[0041] Additionally, partition wall 8c extends upstream toward main body 12 and is connected to partition wall 12b provided within main body 12. That is, as shown in Figure 6, partition wall 8c of drain pipe connection part 8 and partition wall 12b of main body 12 are arranged so that their wall surfaces abut against each other, and the two function as an integrated partition wall.

[0042] Next, the configuration of the bathtub water flow path 22 will be described in detail with reference to FIGS. Wastewater flowing in from the bathtub water receiving section 6 flows into the main body 12 through the wide dip flow path cross section 28. As shown in FIG. 8, the dip flow path cross section 28 is open across almost the entire width of the main body 12. This allows the dip section 28a (FIG. 7) to be located at a low position while still ensuring a large cross-sectional area for the dip flow path cross section 28. Furthermore, in top view, the bathtub water flow path 22 passes through one side of the washing area water receiving section 10 and extends to the drain pipe connection section 8. This allows the bathtub water flow path 22 to have a large cross-sectional area while reducing the overall width of the bathroom drain trap 1 compared to when the bathtub water flow path 22 passes through both sides of the washing area water receiving section 10.

[0043] Furthermore, the bathtub water flow path 22 is configured so that its width gradually decreases downstream of the dip flow path cross section 28, reaching its narrowest position to the side of the center C of the washing basin water receiving section 10. That is, the bathtub water flow path 22 is configured so that its width is narrowest at the side flow path cross section 22b located to the side of the center C of the washing basin water receiving section 10. Meanwhile, as shown in FIG. 7, the bathtub water flow path 22 is configured so that its height gradually increases from the dip flow path cross section 28 to the side flow path cross section 22b. Thus, the bathtub water flow path 22 has a horizontally elongated cross section at the dip flow path cross section 28, while the side flow path cross section 22b to the side of the washing basin water receiving section 10 has a vertically elongated cross section. This allows the bathtub water flow path 22 to have a sufficient cross-sectional area while being configured so that its width is narrow at the position where the wastewater passes along the side of the washing basin water receiving section 10 toward the drain pipe connection section 8.

[0044] Furthermore, dip flow path cross section 28 is open across almost the entire width of main body 12. Therefore, in a top view, some of the projection lines of dip flow path cross section 28 projected toward drain pipe connector 8 are not obstructed by the inner wall surface of bathtub water flow path 22, and extend beyond center C of washing basin water receiver 10 to the side of drain pipe connector 8. That is, in Figure 8, of the projection lines of dip flow path cross section 28 projected toward drain pipe connector 8, projection line group p1 is obstructed by the inner wall surface of bathtub water flow path 22, but projection line group p2 is not obstructed by the inner wall surface of bathtub water flow path 22, passes through side flow path cross section 22b, and extends beyond center C of washing basin water receiver 10 to the side of drain pipe connector 8 (the right side in Figure 8).

[0045] Thus, in the bathroom drain trap 1 of this embodiment, a portion of the projection line of the dip flow path cross section 28 is not obstructed by the inner wall surface of the bathtub water flow path 22 in a top view, and extends beyond the center C of the washing area water receiving section 10 to the side of the drain pipe connection 8. As a result, some of the wastewater flowing into the main body 12 from the dip flow path cross section 28 can flow past the center C of the washing area water receiving section 10 toward the side of the drain pipe connection 8 while maintaining a high flow rate. Meanwhile, although some of the wastewater flowing in from the dip flow path cross section 28 collides with the inner wall surface of the bathtub water flow path 22, because there are fast-flowing sections within the bathtub water flow path 22, the wastewater that collides with the inner wall surface is drawn into the fast-flowing wastewater and flows smoothly through the side flow path cross section 22b toward the drain pipe connection 8. As a result, the flow in the bathtub water flow path 22 is less likely to stagnate, and adhesion of dirt to the inner wall surface is suppressed.

[0046] Next, the operation of the bathroom drain trap 1 according to the embodiment of the present invention will be described. First, as shown in Figure 3, when the bathroom drain trap 1 is in a standby state (when no wastewater is flowing into either the bathtub water receiving section 6 or the washing area water receiving section 10), accumulated water W is stored inside the washing area water chamber 20 and the washing area water flow path 24 up to approximately the height of the washing area-side overflow section 24a. Also, in the standby state, accumulated water W is stored inside the bathtub water chamber 26 and the bathtub water flow path 22 up to approximately the height of the bathtub-side overflow section 22a.

[0047] In this state, when water is flowed onto the floor surface 4a of the washing area 4 and wastewater flows into the washing area water receiving section 10, the wastewater flows into the washing area water storage chamber 20 in the water storage barrel 16. When wastewater flows into the washing area water storage chamber 20, the accumulated water in the washing area water storage chamber 20 flows into the washing area water flow path 24 through the gap (Figure 5) between the notch 16c provided at the bottom end of the water storage barrel 16 and the bottom surface of the main body 12. This causes the water level in the washing area water flow path 24 to rise, and the wastewater flows over the washing area side overflow section 24a and into the flow path in the drain pipe connection section 8. The wastewater that flows into the flow path in the drain pipe connection section 8 is discharged into the sewer through the drain pipe D connected to the drain pipe connection section 8.

[0048] Meanwhile, in the standby state, when the drain plug (not shown) of the bathtub 2 is opened and wastewater flows into the bathtub water receiving section 6, the wastewater flows into the L-shaped pipe 14. The wastewater that flows into the L-shaped pipe 14 flows into the bathtub water flow path 22 inside the main body 12 through the dip flow path cross section 28 (Figure 3) provided at the upstream end of the main body 12. This causes the water level in the bathtub water flow path 22 (bathtub water chamber 26) to rise, and the wastewater flows over the bathtub side overflow section 22a and into the flow path inside the drain pipe connection section 8. The wastewater that flows into the flow path inside the drain pipe connection section 8 is discharged into the sewer through the drain pipe D connected to the drain pipe connection section 8.

[0049] At this time, some of the wastewater that flows into the main body 12 through the dip flow path cross section 28 is not blocked by the inner wall surface of the bathtub water flow path 22, and can flow in a straight line through the side flow path cross section 22b toward the drain pipe connection part 8 while maintaining its flow velocity. Also, some of the wastewater that flows in from the dip flow path cross section 28 collides with the inner wall surface of the bathtub water flow path 22, but is caught up in the faster-flowing wastewater and can pass through the side flow path cross section 22b at a relatively high flow velocity. In this way, the wastewater that flows in from the bathtub water receiving part 6 flows through the main body 12 while maintaining a relatively high flow velocity, thereby suppressing the adhesion of dirt to the inner wall surface of the bathtub water flow path 22.

[0050] According to the bathroom drain trap 1 of the embodiment of the present invention, the bathtub water receiving section 6, the washing area water receiving section 10, and the drain pipe connection section 8 are arranged in a line, allowing the bathroom drain trap 1 to be made smaller. Furthermore, with the bathroom drain trap 1 of this embodiment, some of the projection lines (projection line group p2 in FIG. 8 ) of the dip flow path cross section 28 projected toward the drain pipe connection section 8 are not obstructed by the inner wall surface of the bathtub water flow path 22 in a top view, and extend beyond the center C of the washing area water receiving section 10 to the side of the drain pipe connection section 8. As a result, some of the wastewater that passes through the dip flow path cross section 28 can flow beyond the washing area water receiving section 10 to the side of the drain pipe connection section 8 without colliding with the inner wall surface of the bathtub water flow path 22, allowing the flow velocity of the wastewater to be maintained sufficiently high and preventing dirt from adhering.

[0051] In addition, according to the bathroom drain trap 1 of this embodiment, the bathtub water flow path 22, when viewed from above, passes through one side of the washing area water receiving section 10 (Figure 4) and is connected to the drain pipe connection section 8, so that the flow path cross-sectional area of ​​the bathtub water flow path 22 can be secured to be larger than when it passes through both sides of the washing area water receiving section 10, and the flow rate of the drainage water flowing through the bathtub water flow path 22 can be maintained high, thereby suppressing the adhesion of dirt.

[0052] Furthermore, according to the bathroom drain trap 1 of this embodiment, bathtub water flow path 22 has a horizontally elongated cross-section at dip flow path cross-section 28, which allows dip portion 28a (FIG. 7) to be located at a low position while ensuring a sufficient dip flow path cross-sectional area, ensuring a sufficient water seal depth. Also, bathtub water flow path 22 has a vertically elongated cross-section at side flow path cross-section 22b on the side of washing area water receiving portion 10, which allows the width of bathtub water flow path 22 to be narrowed while ensuring a large side flow path cross-sectional area, allowing the bathroom drain trap 1 to be configured with a small width.

[0053] Furthermore, in the bathroom drain trap 1 of this embodiment, the bathtub water flow path 22 is configured so that the width gradually decreases while the height gradually increases from the dip flow path cross section 28 to the side flow path cross section 22b, allowing the wastewater that passes through the dip flow path cross section 28 to be smoothly guided and reach the side flow path cross section 22b without a significant decrease in flow velocity. This allows the flow velocity of the wastewater flowing through the bathtub water flow path 22 to be maintained high, preventing the buildup of dirt.

[0054] Furthermore, according to the bathroom drain trap 1 of this embodiment, the bathtub water flow path 22 is configured so that its height gradually decreases from the bathtub water receiving portion 6 toward the dip flow path cross section 28 (FIG. 7). This allows the height dimension of the bathroom drain trap 1 to be reduced while suppressing a decrease in the flow rate of the wastewater. Furthermore, by increasing the flow rate of the wastewater passing through the dip flow path cross section 28, the flow rate of the wastewater flowing toward the drain pipe connection portion 8 without being obstructed by the inner wall surface of the bathtub water flow path 22 increases. As a result, the wastewater near the inner wall surface of the bathtub water flow path 22 can be caught up in the high-speed flow of wastewater, thereby speeding up the overall flow within the bathtub water flow path 22. This prevents dirt from adhering to the bathtub water flow path 22.

[0055] The bathroom drain trap 1 according to the embodiment of the present invention has been described above, but various modifications can be made to the above-described embodiment. [Explanation of symbols]

[0056] 1. Bathroom drain trap 2 bathtubs 2a Bottom 4 Washing area 4a Floor surface 6 Bathtub water receiving section 8 Drain pipe connection 8a Large diameter part 8b Small diameter section 8c Compartment wall 10 Washing area water receiving section 12 Main body 12a Slope 12b Partition wall 14 L-shaped tube 14a Vertical section 14b Horizontal part 16 Water Bottle 16a lower part 16b Upper part 16c Notch 18 Hair Catcher 20 Washing area water storage room 22 Bathtub water flow path 22a Bathtub side overflow section 22b Side channel cross section 24 Washing area water flow path 24a Washing area side overflow section 26 Bathtub water chamber 28 Dip flow path cross section 28a Dip section

Claims

1. A bathroom drain trap that receives drainage from the bathtub and the wash area and discharges it into the drain pipe. a bathtub water receiving section into which drainage water from the bathtub flows; a washing area water receiving section into which wastewater from the washing area flows; A drain pipe connection portion to which drain pipes for discharging drainage from the bathtub and the washing area are connected; a bathtub water flow path that connects the bathtub water receiving portion and the drain pipe connecting portion; a bathtub water chamber that stores the drainage water flowing in from the bathtub water receiving section; A dip section that determines the minimum water level in the bathtub water chamber that can be sealed by the bathtub water chamber; and The bathtub water receiving section, the washing area water receiving section, and the drain pipe connecting section are arranged in a line in this order, The dip portion is configured as the upper edge of the dip flow path cross section located between the bathtub water receiving portion and the washing area water receiving portion of the bathtub water flow path, A bathroom drain trap characterized in that, when viewed from above, a portion of the projection line of the dip flow path cross section projected toward the drain pipe connection portion is not obstructed by the inner wall surface of the bathtub water flow path, and extends beyond the center of the washing area water receiving portion to the side of the drain pipe connection portion.

2. A bathroom drain trap as described in claim 1, wherein the bathtub water flow path extending from the dip portion to the drain pipe connection portion passes through one side of the washing area water receiving portion when viewed from above and is connected to the drain pipe connection portion.

3. A bathroom drain trap as described in claim 1, wherein the bathtub water flow path has a horizontally elongated cross section at the dip flow path cross section, while the side flow path cross section on the side of the washing area water receiving section has a vertically elongated cross section.

4. 4. The bathroom drain trap according to claim 3, wherein the bathtub water flow path is configured so that the flow path width gradually decreases while the flow path height gradually increases from the dip flow path cross section to the side flow path cross section.

5. 2. The bathroom drain trap according to claim 1, wherein the bathtub water flow path is configured so that the flow path height gradually decreases from the bathtub water receiving portion toward the dip flow path cross section.

Images