JP7642464B2 - 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, bathtub wastewater drained from the bathtub and washing area wastewater drained from the washing area flow into the water collection section of the drain trap described in Patent Document 1 below. The bathtub wastewater and washing area wastewater join together in the water collection section and flow out to the drain pipe. A valve member is attached to the inlet into which the bathtub wastewater flows. The valve member prevents the washing area wastewater from flowing back into the bathtub.

JP 2010-242462 A

The valve member of the drain trap described above may stop functioning due to the adhesion of dirt, etc. If the valve member stops functioning, there is a risk that the wash area drainage will backflow into the bathtub.

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

The drain trap of the present disclosure has a receiving section into which washing area drainage and bathtub drainage flow, and the receiving section has a washing area side inlet into which the washing area drainage flows, a bathtub side inlet into which the bathtub drainage flows, an outlet from which the washing area drainage and bathtub drainage flow out, and an upper wall section located above the bathtub side inlet within the receiving section.

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 cross-sectional view showing how the wall member is attached to and detached from the receiving portion. FIG. 11 is a partially enlarged cross-sectional view showing an opening of an upper wall portion of a drain trap according to another embodiment (1);

<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 opening 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 in which the left-right center portion is 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. An inspection opening 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.

The drain trap 10 is equipped with a wall member 40 that changes the flow direction of the washing area drainage water two or more times when assuming a flow path of the washing area drainage water from the washing area side inlet 18 toward the bathtub side inlet 17. As shown in FIG. 2, the wall member 40 extends from the bathtub side inlet 17 toward the outlet 19. The wall member 40 is detachable from the receiving portion 13.

As shown in FIG. 8, the wall member 40 has an upper wall portion 41 and left and right first and second side wall portions 42F and 42S. The first and second side wall portions 42F and 42S hang down from the upper wall portion 41.

As shown in FIG. 2, the upper wall portion 41 is located above the bathtub side inlet 17 within the receiving portion 13. The upper wall portion 41 extends downward from the bathtub side inlet 17 toward the outlet 19. On the inside of the wall member 40, the upper wall portion 41 and the left and right first and second side wall portions 42F and 42S form a flow path that flows linearly from the bathtub side inlet 17 toward the outlet 19.

As shown in Figures 7 and 8, the first side wall portion 42F and the second side wall portion 42S are provided from the rear end of the upper wall portion 41 to the middle position of the upper wall portion 41 in the front-rear direction. The first side wall portion 42F hangs down from the right edge 54 of the upper wall portion 41. The right edge 54 of the upper wall portion 41 extends in an oblique direction so as to reduce the left-right dimension of the upper wall portion 41. The first side wall portion 42F is linear in a plan view. The second side wall portion 42S hangs down from a position slightly to the right of the left edge 53 of the upper wall portion 41. The second side wall portion 42S is close to the side wall 23 of the receiving portion 13.

The wall member 40 has a first opening 43F and a second opening 43S that open in the left-right direction on the downstream side from the bathtub side inlet 17 toward the outlet 19. The first opening 43F is a portion forward of the front end of the first side wall portion 42F. In FIG. 7, the formation range of the first opening 43F and the second opening 43S is shown by shading. The second opening 43S is a portion forward of the front end of the second side wall portion 42S. The first opening 43F and the second opening 43S are connected in the left-right direction. The first opening 43F and the second opening 43S are continuous at the front end of the upper wall portion 41. The front end of the first opening 43F is close to the outlet 19. The rear end of the second opening 43S is located near the connecting portion. The second opening 43S is along the outlet 19 formed in the curved portion 31.

As shown in FIG. 8, the wall member 40 has a handle portion 52. The handle portion 52 protrudes upward from the upper wall portion 41. The handle portion 52 is provided in the center of the wall member 40 in the front-rear direction. A user can grasp the handle portion 52 to easily attach and detach the wall member 40 to and from the receiving portion 13.

As shown in FIG. 9, the left edge 53 of the upper wall portion 41 is curved along the side wall 23 of the receiving section 13. The right edge 54 of the upper wall portion 41 is linear in plan view. An arrow indicating the direction in which the wall member 40 is attached and detached is provided on the top surface of the upper wall portion 41. The wall member 40 is attached and detached by sliding in the left-right direction.

The wall member 40 has a first hook portion 55 and a second hook portion 56 that hook onto the side wall 23 of the receiving portion 13. The first hook portion 55 is provided at the upper corner of the upper wall portion 41. The first hook portion 55 is inserted into the bathtub side inlet 17 and hooks onto the side wall 23 of the receiving portion 13. The second hook portion 56 is provided at the front end of the upper wall portion 41. The second hook portion 56 is inserted into the outlet 19 and hooks onto the side wall 23 of the receiving portion 13. A positioning portion 57 is provided on the upper surface of the upper wall portion 41. The positioning portion 57 is wall-shaped and fits along the side wall 23 of the receiving portion 13.

The flow path formed inside the wall member 40 is linear. The water flowing inside the wall member 40 spreads out in the left-right direction on the downstream side. The water flowing inside the wall member 40 changes direction of flow diagonally to the right from the first opening 43F and flows into the outlet 19, or changes direction of flow diagonally to the left from the second opening 43S and flows into the outlet 19.

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. The washing area drainage that hits the upper wall portion 41 of the wall member 40 is guided to the outlet 19 along the upper surface of the upper wall portion 41. The washing area drainage that does not hit the upper wall portion 41 is guided to the outlet 19 along the outer surface of the first side wall portion 42F of the wall member 40. Therefore, the washing area drainage can be prevented from flowing back into the bathtub side inlet 17.

In order for the washing area wastewater to flow into the bathtub side inlet 17, it must first flow downward from the washing area side inlet 18 into the receiving section 13, then turn from the outer right side of the wall member 40 to the left side, flow into the inside of the wall member 40 through the first opening 43F, and then turn to the rear and flow into the bathtub side inlet 17. In other words, in order for the washing area wastewater to flow into the bathtub side inlet 17, the flow direction must be changed at least twice by the wall member 40. Therefore, backflow of the washing area wastewater is prevented.

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 19. At this time, the bathtub drainage spreads to the right from the first opening 43F on the downstream side of the wall member 40 and flows into the outlet 19, or spreads to the left from the second opening 43S and flows into the outlet 19. Because the outlet 19 has sufficient width in the left-right direction, the bathtub drainage flows out without overflowing into the receiving section 13. When the outflow of washing area drainage and bathtub drainage stops, sealing water accumulates inside the receiving section 13 and the outflow section 14 up to the sealing water surface F. This prevents the backflow of odors from the external outlet pipe and the intrusion of pests.

The embodiment configured as above provides the following advantages:

The drain trap 10 has a receiving section 13. Washing area wastewater and bathtub wastewater flow into the receiving section 13. The receiving section 13 has a washing area side inlet 18, a bathtub side inlet 17, an outlet 19, and an upper wall section 41. Washing area wastewater flows into the washing area side inlet 18. Bathtub wastewater flows into the bathtub side inlet 17. The washing area wastewater and bathtub wastewater that flow in flow out from the outlet 19. The upper wall section 41 is located above the bathtub side inlet 17 within the receiving section 13. With this configuration, the washing area wastewater that flows into the receiving section 13 does not flow directly into the bathtub side inlet 17 due to the upper wall section 41 located above the bathtub side inlet 17. Therefore, it is possible to prevent the washing area wastewater from flowing back to the bathtub side.

The upper wall portion 41 extends downward from the bathtub side inlet 17 toward the outlet 19. With this configuration, the washing area drainage is guided along the upper surface of the upper wall portion 41 toward the outlet 19. This makes it possible to more reliably prevent the washing area drainage from flowing back toward the bathtub.

The upper wall portion 41 constitutes the wall member 40. When assuming a flow path of washing area drainage from the washing area side inlet 18 toward the bathtub side inlet 17, the wall member 40 changes the flow direction of the washing area drainage flow path two or more times. With this configuration, the washing area drainage does not reach the bathtub side inlet 17 unless it changes its flow direction two or more times. Therefore, it is possible to prevent the washing area drainage from flowing back toward the bathtub.

<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 first opening 43F and the second opening 43S are provided in the first side wall portion 42F and the second side wall portion 42S of the wall member 40. Not limited to this, as shown in FIG. 10, an opening 58 that opens in the vertical direction may be provided in the upper wall portion 41 of the wall member 40. In this case, the opening 58 may be formed outside the region R in which the washing place side inlet 18 is projected directly below. According to this configuration, the washing place drainage flows downward from the washing place side inlet 18 into the region R of the receiving portion 13, then hits the upper surface of the upper wall portion 41, turns diagonally forward and downward, flows into the inside of the wall member 40 from the opening 58, and then turns rearward before flowing into the bathtub side inlet 17. In other words, the washing place drainage does not reach the bathtub side inlet 17 unless it changes its flow direction at least twice. Therefore, it is possible to prevent the washing place drainage from flowing back into the bathtub side inlet 17.
(2) In the above embodiment, the bathroom unit 90 includes a bathtub pan 95. However, the present invention 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.
(3) In the above embodiment, the wall member 40 includes the first side wall portion 42F and the second side wall portion 42S. However, the present invention is not limited to this, and the wall member does not need to include both or either one of the first side wall portion and the second side wall portion.
(4) In the above embodiment, the first opening 43F and the second opening 43S are formed in the first side wall portion 42F and the second side wall portion 42S, respectively. This is not limited thereto, and an opening does not have to be formed in both or either one of the first side wall portion and the second side wall portion.

10...Drain trap, 13...Receiving section, 17...Bathtub side inlet, 18...Washing area side inlet, 19...Outlet, 40...Wall member, 41...Upper wall, 42F...First side wall, 42S...Second side wall, 43F...First opening, 43S...Second opening, 58...Opening

Claims (5)

Equipped with a receiving section into which washing area wastewater and bathtub wastewater flow,
The receiving section includes a washing area side inlet into which the washing area drainage flows, a bathtub side inlet into which the bathtub drainage flows, an outlet through which the washing area drainage and the bathtub drainage flow out, and an upper wall portion located above the bathtub side inlet within the receiving section .
A drain trap , wherein the upper wall portion extends from above the bathtub side inlet toward above a portion of the outlet . The drain trap according to claim 1, wherein the upper wall portion extends downward from the bathtub side inlet toward the outlet. The drain trap according to claim 1 , further comprising a side wall portion that hangs down from the upper wall portion and extends from the bathtub side inlet toward the outlet . The drain trap according to claim 3 , wherein the side wall portion has an opening portion that opens in the left-right direction on the downstream side from the bathtub side inlet toward the outlet. The drain trap according to claim 3, wherein the upper wall portion has an opening that opens in the vertical direction downstream from the bathtub side inlet toward the outlet.

Images