JP7653318B2 - Drain trap - Google Patents

Description

This disclosure relates to a drain trap.

Conventionally, drain traps that are installed under the floor of a bathroom unit or the like are known. For example, the following Patent Document 1 describes a drain trap that has a water storage section and a water seal cylinder placed within the water storage section. The water seal of this drain trap is formed by the water storage section and the water seal cylinder. Bathtub wastewater drained from the bathtub and washing area wastewater drained from the washing area flow into the water storage section of the drain trap. The bathtub wastewater and washing area wastewater join together in the water storage section and are discharged into the drain pipe.

JP 2010-242462 A

Drain traps that form a water seal using a water storage section and a water seal tube tend to have a small water storage section volume. If the volume of the water storage section is small, bathtub drainage is likely to overflow from the water storage section.

This disclosure was completed based on the above circumstances, and aims to provide a drain trap that can prevent bathtub drainage from overflowing.

The drain trap of the present disclosure comprises a receiving section into which bathtub drainage and washing area drainage flow, and an outflow section provided in communication with the downstream side of the receiving section, the receiving section having a bathtub side inlet into which the bathtub drainage flows, a washing area side inlet into which the washing area drainage flows, and an outflow outlet through which the bathtub drainage and washing area drainage that have flowed in flow out to the outflow section side, the side wall of the receiving section has an extension section located outside the periphery of the washing area side inlet in a plan view, and the extension section and the periphery of the washing area side inlet are arranged at non-equidistant intervals in a plan view.

FIG. 1 is a side view showing the drain trap installed under the floor of a bathroom unit. Vertical section showing the drain trap Top view showing the drain trap FIG. 4 is a cross-sectional view showing the drain trap with the wall member removed, the cross-sectional view corresponding to the cross-section taken along the line A-A in FIG. FIG. 4 is a cross-sectional view showing the drain trap with the wall member attached, which corresponds to the cross-section taken along the line A-A in FIG. FIG. 4 is a cross-sectional view showing the drain trap with the wall member attached, which corresponds to the cross-section taken along the line B-B in FIG. FIG. 2 is a cross-sectional plan view showing the drain trap, which corresponds to the cross section taken along the line CC in FIG. 1; FIG. A partially enlarged plan view illustrating the positional relationship between the side wall of the receiving section and the periphery of the inlet of the washing area.

<Embodiment>
The drain trap 10 is installed under the floor of the bathroom unit 90 as shown in FIG. 1. The bathroom unit 90 includes a bathtub 91, a washing area 93, and a bathtub pan 95. The bathtub 91 has a bathtub drain 92 for draining water from the bathtub 91. The bathtub pan 95 is disposed under the bathtub 91. The bathtub pan 95 has a bathtub pan drain 96 below the drain of the bathtub 91. A bathtub drain pipe 97 is connected to the bathtub pan drain 96. The drain trap 10 is connected to the downstream end of the bathtub drain pipe 97. The washing area 93 constitutes the floor surface of the bathroom unit 90. The washing area 93 has a washing area drain 94 for draining water from the washing area 93. The drain trap 10 is connected to the underside of the washing area drain 94.

The bathroom unit 90 is installed on a floor structure 98 such as a slab. The drain trap 10 is installed between the washing area 93 and the floor structure 98. The space between the washing area 93 and the floor structure 98 is the installation space 99 for the drain trap 10. The height dimension H1 of the installation space 99 is determined by the water height UBFL of the washing area 93 of the bathroom unit 90 and the height position SL of the floor structure 98. The height dimension H2 of the drain trap 10 is made small so that it can be used when the height dimension H1 of the installation space 99 is small. The height dimension H2 of the drain trap 10 is the vertical dimension of the outer shape of the receiving part 13 described later, and is the dimension from the mounting surface to the bottom end of the receiving part 13. The height dimension H2 of the drain trap 10 is 130 mm or less.

As shown in FIG. 1, the drain trap 10 has a bathtub side connection part 11 that is connected to the downstream end of the bathtub drain pipe 97. Bathtub wastewater drained from the bathtub 91 flows into the drain trap 10 from the side. Washing area wastewater drained from the washing area 93 flows into the drain trap 10 from above. The drain trap 10 has an outlet side connection part 12 that is connected to the upstream end of the external outlet pipe 100. The drain trap 10 discharges bathtub wastewater and washing area wastewater into the external outlet pipe 100.

As shown in FIG. 2, the drain trap 10 has an inlet 15, a receiving section 13, and an outlet 14. The inlet 15 has a bathtub side connection section 11. Bathtub drainage and other drainage as necessary are introduced into the inlet 15. Bathtub drainage, washing area drainage, and other drainage flow into the receiving section 13 when they are introduced. The outlet 14 is provided in communication with the downstream side of the receiving section 13. The outlet 14 has a drainage outlet 16. When bathtub drainage, washing area drainage, and other drainage flow into the receiving section 13, the drainage outlet 16 discharges the other drainage. The drainage outlet 16 is an opening on the upstream side of the lead-out side connection section 12. The drainage outlet 16 is provided in the center of the left-right direction of the outlet 14 (see FIG. 7).

In the following, the upper side of each component when the drain trap 10 is installed under the bathroom unit 90 will be referred to as the upper side, the lower side as the lower side, the bathtub side inlet 17 side as the rear side, the drain outlet 16 side as the front side, and the right side from the bathtub side inlet 17 side to the drain outlet 16 side as the right side and the left side as the left side. In each figure, the positive side of the X axis is the front side, the negative side of the X axis is the rear side, the positive side of the Y axis is the upper side, the negative side of the Y axis is the lower side, the positive side of the Z axis is the right side, and the negative side of the Z axis is the left side.

As shown in FIG. 2, the receiving section 13 has a bathtub side inlet 17, a washing area side inlet 18, and an outlet 19. Bathtub wastewater flows into the receiving section 13 from the bathtub side inlet 17.

The bathtub side inlet 17 opens into the side wall 23 of the receiving section 13, and connects the introduction section 15 and the receiving section 13. As shown in FIG. 4, the bathtub side inlet 17 is rectangular and elongated in the left-right direction. The left-right dimension W1 of the bathtub side inlet 17 is equal to the diameter dimension of the opening at the downstream end of the bathtub side connection section 11. The height dimension H5 of the bathtub side inlet 17 is constant in the left-right direction. The upper end 17U of the bathtub side inlet 17 is located slightly below half the up-down dimension H2 of the outer shape of the receiving section 13.

The washing area side inlet 18 is circular (see FIG. 3). A hair catcher 21 is removably attached to the washing area side inlet 18. The hair catcher 21 catches foreign objects such as hair that flow from the washing area 93. The hair catcher 21 is positioned above the water sealing surface F. The water sealing surface F is the water surface that is formed in the receiving section 13 and the outflow section 14 when water is stored in the drain trap 10 (see FIG. 2).

As shown in FIG. 2, the outlet 19 is provided at the lower end of the partition wall 25 that separates the side wall 23 of the receiving section 13 from the outlet section 14. The height position of the upper end 19U of the outlet 19 is lower than the height position of the upper end 17U of the bathtub side inlet 17. This allows the height dimension H2 of the drain trap 10 to be reduced while ensuring the water sealing depth H3. The water sealing depth H3 is the height difference between the upper end 19U of the outlet 19 and the water sealing surface F.

As shown in FIG. 6, the outlet 19 has an elongated shape in the left-right direction. The outlet 19 is continuous from the left end to the right end of the receiving section 13. The left-right dimension W2 of the outlet 19 when viewed from the rear is greater than the left-right dimension W1 of the bathtub side inlet 17 when viewed from the front. The up-down dimension H6 of the outlet 19 is constant in the left-right direction of the outlet 19.

As shown in FIG. 7, the side wall 23 of the receiving section 13 includes a bathtub side portion 24, an outlet side portion 25, and left and right side portions 26. The outlet side portion 25 is a partition wall 25 that separates the receiving section 13 and the outlet portion 14. An inspection hatch 32 is formed in the outlet side portion 25 (see FIG. 6). The left and right side portions 26 extend in the front-rear direction and connect the left and right ends of the bathtub side portion 24 and the outlet side portion 25. The left and right ends of the outlet side portion 25, that is, the front ends of the left and right side portions 26, are connected to the side walls 27 of the outlet portion 14. The connecting portion between the side wall 23 of the receiving section 13 and the side wall 27 of the outlet portion 14 is called the connecting portion 28.

As shown in FIG. 7, the bathtub side portion 24 forms the bathtub side inlet 17. In FIG. 7, the area in which the bathtub side inlet 17 is formed is shaded. In a plan view, the bathtub side portion 24 is linear and extends in the left-right direction. An introduction portion 15 is provided on the outer surface of the bathtub side portion 24.

As shown in FIG. 7, the outlet side portion 25 forms the outflow port 19. In FIG. 7, the formation range of the outflow port 19 is shown by shading. The outlet side portion 25 protrudes forward from the connecting portion 28 with the side wall 27 of the outflow portion 14. In a plan view, the outlet side portion 25 is an arc shape with the left-right center portion located forward of both left-right ends. In a plan view, the left-right center portion of the outlet side portion 25 is a straight line portion 29 that is linear. The straight line portion 29 faces the bathtub side portion 24 in parallel. The inspection hatch 32 is formed in the straight line portion 29. In a plan view, both left-right ends of the outlet side portion 25 are curved curved portions 31. The curved portions 31 extend obliquely from the connecting portion 28 toward the straight line portion 29. The outflow port 19 is formed in the entire lower end portion of the outlet side portion 25. The outlet 19 is continuous from the left connecting portion 28 to the right connecting portion 28.

As shown in FIG. 2, the drain trap 10 has a wall member 40 that extends from the bathtub side inlet 17 toward the outlet 19. As shown in FIG. 8, the wall member 40 has an upper wall portion 41 and left and right side wall portions 42. The wall member 40 has an opening 43 on the downstream side that opens in the left and right directions. In FIG. 7, the formation range of the opening 43 is shown by shading. The wall member 40 is freely attachable to and detachable from the receiving portion 13.

As shown in FIG. 9, the side wall 23 of the receiving section 13 has an extension section 61 located outwardly at unequal intervals from the periphery of the washing place side inlet 18 in a plan view. In FIG. 9, an imaginary line 18L is shown in which the periphery of the washing place side inlet 18 is projected directly below to show the position and size of the periphery of the washing place side inlet 18. The extension section 61 is provided on the entire side wall 23 of the receiving section 13. The distance between the side wall 23 of the receiving section 13 and the periphery of the washing place side inlet 18 is the shortest distance from any point on the side wall 23 of the receiving section 13 to the periphery of the washing place side inlet 18 in a plan view.

The distance between the left and right curved portions 31 of the outlet side portion 25 and the periphery of the washing area side inlet 18 gradually increases from the front to the rear. The distance between the left and right side portions 26 of the receiving portion 13 and the periphery of the washing area side inlet 18 gradually increases from the front to the rear.

The left-right dimension W3 of the receiving section 13 gradually increases from the front end to the rear. The left-right dimension W3 of the receiving section 13 rearward of the first imaginary surface 60 is greater than the left-right dimension W3 of the receiving section 13 forward of the first imaginary surface 60. The volume of the receiving section 13 rearward of the first imaginary surface 60 is greater than the volume of the receiving section 13 forward of the first imaginary surface 60. The first imaginary surface 60 is a surface that passes through the central axis CL of the washing area side inlet 18 and divides the washing area side inlet 18 into two, front and rear.

The expansion section 61 has a maximum expansion section 63 that is farther from the periphery of the washing area side inlet 18 than other sections. The maximum expansion section 63 is provided on both the left and right sides of the rear end of the receiving section 13. The maximum expansion section 63 is formed at the boundary between the left and right ends of the bathtub side section 24 and the left and right side sections 26. The maximum expansion section 63 has a shape that is symmetrical with respect to the second imaginary plane 62. The second imaginary plane 62 includes the central axis CL of the washing area side inlet 18 and is a plane that divides the washing area side inlet 18 into two, left and right.

The drainage of the drain trap 10 when the wall member 40 is attached to the receiving section 13 will be explained. The washing area drainage flows into the receiving section 13 from the washing area side inlet 18 while passing through the hair catcher 21. The washing area drainage that hits the upper wall portion 41 of the wall member 40 is guided along the upper wall portion 41 to the outlet 19. The washing area drainage that does not hit the upper wall portion 41 is guided along the outer surface of the side wall portion 42 of the wall member 40 to the outlet 19. Therefore, it is possible to prevent the washing area drainage from flowing back into the bathtub side inlet 17.

Bathtub drainage flows into the inside of the wall member 40 from the bathtub side inlet 17 and is guided in a straight line to the outlet side facing part 51. At this time, the bathtub drainage that spreads to the right from the opening 43 on the downstream side of the wall member 40 flows into the outlet side facing part 51 and the right side of the outlet side facing part 51. The bathtub drainage that spreads to the left from the opening 43 flows into the outlet side facing part 51. Since the outlet 19 has sufficient width in the left-right direction, the bathtub drainage flows out without overflowing into the receiving part 13. When the outflow of washing area drainage and bathtub drainage stops, sealing water accumulates inside the receiving part 13 and the outflow part 14 up to the sealing water surface F. This prevents the backflow of odors from the external discharge pipe 100 and the intrusion of pests.

Even if the wall member 40 is not attached to the receiving section 13, the bathtub drainage flows in a straight line from the bathtub side inlet 17, spreads left and right, flows into the outlet 19, and flows into the outlet section 14. Because the outlet 19 has sufficient left and right expansion, the bathtub drainage flows out without overflowing from the receiving section 13.

The embodiment configured as above provides the following advantages:

The drain trap 10 has a receiving section 13 and an outflow section 14. Bathtub wastewater and washing area wastewater flow into the receiving section 13. The outflow section 14 is provided in communication with the downstream side of the receiving section 13. The receiving section 13 has a bathtub side inlet 17, a washing area side inlet 18, and an outflow section 19. Bathtub wastewater flows into the bathtub side inlet 17. Washing area wastewater flows into the washing area side inlet 18. The outflow section 19 discharges the bathtub wastewater and washing area wastewater that have flowed in to the outflow section 14 side. The side wall 23 of the receiving section 13 has an extension section 61 located outside the periphery of the washing area side inlet 18 in a plan view. The extension section 61 and the periphery of the washing area side inlet 18 are arranged at non-equidistant intervals in a plan view. With this configuration, the receiving portion 13 and the outflow portion 14 form a water seal, so it is easier to increase the volume of the drain trap 10 than if the water seal was formed by a water storage portion and a water seal tube. The receiving portion 13 has an expansion portion 61 that is positioned outwardly at non-equidistant intervals from the periphery of the washing place side inlet 18. Therefore, the volume of the receiving portion 13 can be increased regardless of the size of the washing place side inlet 18, making it less likely for the bathtub drainage to overflow.

Of the side walls 23 of the receiving section 13, the bathtub side portion 24 that forms the bathtub side inlet 17 extends linearly in a plan view. With this configuration, the washing area side inlet 18 can be positioned closer to the bathtub 91 than if the bathtub side portion 24 were curved in a plan view. Because the bathtub side portion 24 extends linearly, it is easier to connect components such as piping that are to be placed on the bathtub 91 side.

Of the side walls 23 of the receiving section 13, the outlet side portion 25 that forms the outflow port 19 is, in plan view, an arc-shaped portion that juts out toward the outflow section 14. With this configuration, the volume of the receiving section 13 can be increased while keeping the front-to-rear dimension of the drain trap 10 small, compared to when the outlet side portion 25 is linear.

The volume of the receiving section 13 on the rear side of the central axis CL of the washing area side inlet 18 is larger than the volume of the receiving section 13 on the front side of the central axis CL. With this configuration, the volume of the receiving section 13 on the bathtub 91 side can be increased.

The left-right dimension W3 of the receiving portion 13 behind the central axis CL of the washing area side inlet 18 is larger than the left-right dimension W3 of the receiving portion 13 in front of the central axis CL. With this configuration, the left-right dimension W3 of the receiving portion 13 on the bathtub 91 side can be made larger.

An inspection port 32 is formed in the outlet side portion 25, which forms the outlet port 19, of the side wall 23 of the receiving portion 13. With this configuration, if the drain trap 10 becomes clogged, the inside of the outlet portion 14 can be inspected.

The vertical dimension H2 of the outer shape of the receiving portion 13 is 130 mm or less. With this configuration, the drain trap 10 can be installed in an installation space 99 with strict height restrictions.

<Other embodiments>
The present disclosure is not limited to the embodiments described above and illustrated in the drawings, and for example, the following embodiments are also included within the technical scope of the present disclosure.
(1) In the above embodiment, the bathroom unit 90 includes a bathtub pan 95. However, this is not limited to this, and the drain trap 10 can also be applied to a bathroom unit that does not include a bathtub pan.
(2) In the above embodiment, the height dimension H2 of the drain trap 10 is 130 mm or less. However, the height dimension of the drain trap is not limited to this and may be 130 mm or more.
(3) In the above embodiment, the extension 61 is provided on the entire side wall 23 of the receiving portion 13. However, the present invention is not limited to this, and the extension may be provided on only a part of the side wall of the receiving portion.

CL...center axis of the inlet on the washing area side, H3...top-bottom dimension of the outer shape of the receiving part, W3...left-right dimension of the receiving part, 10...drain trap, 13...receiving part, 14...outlet, 17...bathtub side inlet, 18...washing area side inlet, 19...outlet, 23...side wall of receiving part, 24...bathtub side part, 25...outlet side part, 32...inspection hatch, 61...extension part

Claims (7)

The system includes a receiving section into which bathtub drainage and washing area drainage flow, and an outflow section provided downstream of the receiving section in communication with the bathtub drainage and washing area drainage.
The receiving section has a bathtub side inlet into which the bathtub drainage flows, a washing place side inlet into which the washing place drainage flows, and an outlet through which the bathtub drainage and the washing place drainage that have flowed in flow out to the outflow section side,
The side wall of the receiving portion has an extension portion located outside the periphery of the washing place side inlet in a plan view,
The washing place side inlet is circular, and the left-right dimension of the receiving portion is maximum on the bathtub side inlet side from the central axis of the washing place side inlet, and gradually becomes smaller toward the opposite side of the bathtub side inlet from the central axis,
A drain trap, wherein the expansion portion and the periphery of the washing area side inlet are arranged at non-equidistant intervals in a plan view. The drain trap according to claim 1, wherein the bathtub side portion of the side wall of the receiving portion that forms the bathtub side inlet extends linearly in a plan view. The washing place side inlet is circular,
A drain trap as described in any one of claims 1 to 2, wherein the volume of the receiving portion on the bathtub side inlet side of the central axis of the washing area side inlet is larger than the volume of the receiving portion on the opposite side of the bathtub side inlet from the central axis. The washing place side inlet is circular,
A drain trap described in any one of claims 1 to 3, wherein the left-right dimension of the receiving portion on the bathtub side inlet side relative to the central axis of the washing area side inlet is larger than the left-right dimension of the receiving portion on the opposite side of the bathtub side inlet relative to the central axis. The drain trap according to any one of claims 1 to 4, wherein the outlet side portion of the side wall of the receiving portion that forms the outlet is, in a plan view, arc-shaped and protruding toward the outflow portion. The drain trap according to any one of claims 1 to 5, wherein an inspection port is formed on the outlet side portion of the side wall of the receiving portion that forms the outflow port. The system includes a receiving section into which bathtub drainage and washing area drainage flow, and an outflow section provided downstream of the receiving section in communication with the bathtub drainage and washing area drainage.
The receiving section has a bathtub side inlet into which the bathtub drainage flows, a washing place side inlet into which the washing place drainage flows, and an outlet through which the bathtub drainage and the washing place drainage that have flowed in flow out to the outflow section side,
The side wall of the receiving portion has an extension portion located outside the periphery of the washing place side inlet in a plan view,
The expansion portion and the periphery of the washing place side inlet are arranged at unequal intervals in a plan view,
The drain trap according to claim 1 , wherein a vertical dimension of the outer shape of the receiving portion is 130 mm or less.

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