JP2023007671A - drain trap - Google Patents

Abstract

To provide a drain trap capable of preventing washing place drainage from flowing back into a bathtub from a washing area.SOLUTION: The drain trap has a reception part 13 into which washing place drainage and bathtub drainage flows. The reception part 13 includes: a washing place side inlet 18 into which the washing place drainage flows; a bathtub side inlet 17 into which the bathtub drainage flows; an outlet 19 from which the flowing-in washing place drainage and bathtub drainage flow out; and an upper wall 41 positioned above the bathtub side inlet 17 within the reception part 13.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to drain traps.

2. Description of the Related Art Conventionally, a drain trap installed under the floor of a bathroom unit or the like is known. For example, bathtub drainage discharged from the bathtub and washing place drainage discharged from the washing place flow into the water storage portion of the drainage trap described in Patent Document 1 below. Bathtub drainage and washing place drainage join together in the reservoir and flow out to the drainage pipe side. A valve member is attached to the inlet into which bathtub drainage flows. The valve member prevents backflow of wastewater from the washing area to the bathtub side.

JP 2010-242462 A

In the drain trap described above, there is a possibility that the valve member may not function due to adhesion of dirt or the like. When the valve member stops functioning, there is a risk that the washing place drainage will flow back to the bathtub side.

The present disclosure has been completed based on the circumstances as described above, and an object of the present disclosure is to provide a drainage trap that can prevent backflow of wastewater from the washing area to the bathtub side.

The drainage trap of the present disclosure includes a receiving portion into which washing place wastewater and bathtub wastewater flow, and the receiving portion includes a washing place side inlet into which the washing place wastewater flows, a bathtub side inlet into which the bathtub wastewater flows, and an inflow. and an upper wall portion positioned above the bathtub-side inlet in the receiving portion.

A side view of the drain trap installed under the floor of the bathroom unit. Longitudinal cross section showing a drain trap Plan view showing drain trap FIG. 4 is a cross-sectional view showing the drain trap with the wall member removed, and is a cross-sectional view corresponding to the cross-section at the AA position in FIG. 3; FIG. 4 is a cross-sectional view showing the drain trap with the wall member attached, and is a cross-sectional view corresponding to the cross section taken along the line AA in FIG. 3; FIG. 4 is a cross-sectional view showing the drain trap with the wall member attached, the cross-sectional view corresponding to the cross-section taken along the line BB in FIG. 3; FIG. 2 is a plan cross-sectional view showing the drain trap, which is a cross-sectional view corresponding to the cross-section at the CC position in FIG. 1; Perspective view showing a wall member Partially enlarged plan cross-sectional view showing how the wall member is attached to and detached from the receiving part Partially enlarged cross-sectional plan view showing the opening of the upper wall of the 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. A bathroom unit 90 includes a bathtub 91, a washing area 93, and a bathtub pan 95. - 特許庁The bathtub 91 has a bathtub drain port 92 for draining the water in the bathtub 91 . A bathtub pan 95 is placed under the bathtub 91 . The bathtub pan 95 has a bathtub pan drain port 96 below the drain port of the bathtub 91 . A bathtub drain pipe 97 is connected to the bathtub pan drain port 96 . The drain trap 10 is connected to the downstream end of the bathtub drain pipe 97 . The wash area 93 constitutes the floor surface of the bathroom unit 90 . The washing place 93 has a washing place drain port 94 for draining the water of the washing place 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. A 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 height above water 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 as to correspond to the case where the installation space 99 has a small height dimension H1. The height dimension H2 of the drain trap 10 is the vertical dimension of the outer shape of the receiving portion 13, which will be described later, and is the dimension from the mounting surface to the lower end of the receiving portion 13. As shown in FIG. The height dimension H2 of the drain trap 10 is 130 mm or less.

The drain trap 10 has, as shown in FIG. Bathtub drainage drained from a bathtub 91 flows into the drainage trap 10 from the side. Washing place drainage discharged from the washing place 93 flows into the drain trap 10 from above. The drain trap 10 has an outlet-side connector 12 connected to the upstream end of the external lead-out pipe 100 . The drain trap 10 discharges the bathtub drain and the washing place drain to the external outlet pipe 100 .

The drain trap 10 includes an inlet portion 15, a receiving portion 13, and an outlet portion 14, as shown in FIG. The introduction part 15 has a bathtub-side connection part 11 . Bathtub drainage and, if necessary, other drainage are introduced into the introduction part 15 . Bathtub wastewater, washing area wastewater, and other wastewater, if introduced, flow into the receiving portion 13 . The outflow portion 14 is provided in communication with the downstream side of the receiving portion 13 . The outlet 14 has a waste water outlet 16 . The waste water outlet 16 allows the other waste water to flow out when the bathtub waste water, the washing area waste water, and other waste water flow into the receiving portion 13 . The drainage outlet 16 is an opening on the upstream side of the outlet-side connection portion 12 . The drainage outlet 16 is provided in the central portion in the left-right direction of the outflow portion 14 (see FIG. 7).

Hereinafter, in each component, the upper side in the state where the drain trap 10 is installed on the lower side of the bathroom unit 90 is the upper side, the lower side is the lower side, the bathtub side inlet 17 side is the rear side, and the drainage outlet 16 side is the front side. , from the bathtub side inlet 17 side to the drain outlet 16 side, the right side is the right side, and the left side is 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 top side, the negative side of the Y-axis is the bottom side, and the positive side of the Z-axis is the right side. , the negative side of the Z-axis indicates the left side.

The receiving part 13 has a bathtub side inlet 17 , a washing area side inlet 18 , and an outlet 19 , as shown in FIG. 2 . Bathtub drainage flows into the receiving portion 13 from the bathtub-side inlet 17 .

Bathtub-side inlet 17 opens in side wall 23 of receiving portion 13 and communicates introduction portion 15 and receiving portion 13 . As shown in FIG. 4, the bathtub side inlet 17 has a rectangular shape elongated in the left-right direction. The horizontal dimension W1 of the bathtub-side inlet 17 is equal to the diameter of the opening of the bathtub-side connecting portion 11 at the downstream end. The height dimension H5 of the bathtub side inlet 17 is constant in the horizontal direction. An upper end 17U of the bathtub-side inlet 17 is positioned slightly below half of the vertical dimension H2 of the outer shape of the receiving portion 13 .

The washing place side inlet 18 is circular (see FIG. 3). A hair catcher 21 is detachably attached to the washing place side inlet 18.例文帳に追加The hair catcher 21 catches foreign substances such as hair flowing from the washing place 93. - 特許庁The hair catcher 21 is arranged above the water sealing surface F. The water sealing surface F is a water surface formed in the receiving portion 13 and the outflow portion 14 when the drain trap 10 is filled with water (see FIG. 2).

The outflow port 19 is provided at the lower end of a partition wall 25 that separates the outflow portion 14 from the side wall 23 of the receiving portion 13, as shown in FIG. The height position of the upper end 19U of the outflow port 19 is lower than the height position of the upper end 17U of the bathtub side inflow port 17 . As a result, the height dimension H2 of the drain trap 10 can be reduced while the sealing water depth H3 can be ensured. The water sealing depth H3 is the height difference between the upper end 19U of the outflow port 19 and the water sealing surface F.

As shown in FIG. 6, the outflow port 19 is elongated in the left-right direction. The outflow port 19 continues from the left end to the right end of the receiving portion 13 . A lateral dimension W2 of the outflow port 19 when viewed from the rear side is larger than a lateral dimension W1 of the bathtub side inflow port 17 when viewed from the front side. The vertical dimension H6 of the outflow port 19 is constant in the lateral direction of the outflow port 19 .

The side wall 23 of the receiving portion 13 includes a bathtub side portion 24, an outlet side portion 25, and left and right side portions 26, as shown in FIG. The outlet side portion 25 is a partition wall 25 that separates the receiving portion 13 and the outflow 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 side walls 27 of the outflow portion 14 are connected to the left and right ends of the outlet side portion 25 and to the front ends of the left and right side portions 26 . A connecting portion between the side wall 23 of the receiving portion 13 and the side wall 27 of the outflow portion 14 is referred to as a connecting portion 28 .

The bathtub side part 24 forms the bathtub side inlet 17, as shown in FIG. In FIG. 7, the formation range of the bathtub-side inlet 17 is shaded. The bathtub side portion 24 has a linear shape extending in the left-right direction in a plan view. An introduction portion 15 is provided on the outer surface of the bathtub side portion 24 .

The outlet side portion 25 forms the outlet 19, as shown in FIG. In FIG. 7, the formation range of the outflow port 19 is indicated by shading. The outlet side portion 25 protrudes forward from a connection portion 28 with the side wall 27 of the outflow portion 14 . The exit side surface portion 25 has an arc shape in which the center portion in the left-right direction is located forward of both end portions in the left-right direction in a plan view. A central portion in the left-right direction of the outlet side portion 25 is a linear portion 29 that is linear in plan view. The straight portion 29 is parallel to and faces the bathtub side portion 24 . An inspection opening 32 is formed in the straight portion 29 . Both ends of the outlet side portion 25 in the left-right direction are curved portions 31 that are curved in a plan view. The curved portion 31 obliquely extends from the connecting portion 28 toward the straight portion 29 . The outflow port 19 is formed in the entire lower end portion of the outlet side portion 25 . The outflow port 19 continues from the left connecting portion 28 to the right connecting portion 28 .

The drain trap 10 has a wall member 40 that changes the flow direction of the washing place wastewater twice or more when assuming the channel of the washing place wastewater from the washing place side inlet 18 to the bathtub side inlet 17.例文帳に追加The wall member 40 extends from the bathtub-side inlet 17 toward the outlet 19, as shown in FIG. 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 side wall portions 42F and second side wall portions 42S. The first side wall portion 42</b>F and the second side wall portion 42</b>S hang down from the upper wall portion 41 .

The upper wall portion 41 is positioned above the bathtub-side inlet 17 in the receiving portion 13, as shown in FIG. The upper wall portion 41 extends downward from the bathtub-side inlet 17 toward the outlet 19 . Inside the wall member 40, the upper wall portion 41, and the left and right first side wall portions 42F and second side wall portions 42S form a flow path that flows straight from the bathtub side inlet 17 toward the outlet 19. be.

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 in the front-rear direction of the upper wall portion 41, as shown in FIGS. The first side wall portion 42</b>F hangs down from the right edge 54 of the upper wall portion 41 . A right edge 54 of the upper wall portion 41 extends obliquely so as to reduce the lateral dimension of the upper wall portion 41 . The first side wall portion 42F is linear in plan view. The second side wall portion 42</b>S 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 43</b>F and a second opening 43</b>S opening 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 on the front side of the front end of the first side wall portion 42F. In FIG. 7, the formation ranges of the first opening 43F and the second opening 43S are shaded. The second opening 43S is a portion on the front side of the front end of the second side wall portion 42S. The first opening 43F and the second opening 43S communicate in the left-right direction. The first opening 43</b>F and the second opening 43</b>S are continuous at the front end of the upper wall portion 41 . A front end of the first opening 43</b>F is close to the outflow port 19 . The rear end of the second opening 43S is positioned near the connecting portion. The second opening 43</b>S extends along the outflow port 19 formed in the curved portion 31 .

The wall member 40 has a hand portion 52 as shown in FIG. The handle portion 52 protrudes upward from the upper wall portion 41 . The handle portion 52 is provided in the center portion of the wall member 40 in the front-rear direction. The user can easily attach/detach the wall member 40 to/from the receiving portion 13 by gripping the handle portion 52 .

A left edge 53 of the upper wall portion 41 is curved along the side wall 23 of the receiving portion 13, as shown in FIG. A right edge 54 of the upper wall portion 41 is linear in a plan view. The top surface of the upper wall portion 41 is provided with an arrow indicating the mounting and demounting direction of the wall member 40 . The wall member 40 is attached and detached by sliding in the left-right direction.

The wall member 40 includes 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 a corner portion of the upper surface of the upper wall portion 41 . The first hooking portion 55 is inserted into the bathtub side inlet 17 and hooked on the side wall 23 of the receiving portion 13 . The second hook portion 56 is provided at the front end portion of the upper wall portion 41 . The second hooking portion 56 is inserted into the outflow port 19 and hooked on 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 along the side wall 23 of the receiving portion 13 .

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

Drainage of the drain trap 10 when the wall member 40 is attached to the receiving portion 13 will be described. Washing place drainage flows into the receiving part 13 from the washing place side inlet 18 while passing through the hair catcher. Drainage from the washing area that hits the upper wall portion 41 of the wall member 40 is guided to the outflow port 19 along the upper surface of the upper wall portion 41 . The wastewater from the washing area that has not hit the upper wall portion 41 is guided to the outflow port 19 along the outer surface of the first side wall portion 42F of the wall member 40 . Therefore, it is possible to prevent the washing place drainage from flowing back into the bathtub side inlet 17 .

In order for the washing area drainage to flow into the bathtub side inlet 17, it flows downward from the washing area side inlet 18 into the receiving part 13, then turns from the right outer side of the wall member 40 to the left side, and flows through the first opening 43F. It needs to flow inside the wall member 40 and then turn rearward to flow into the bathtub side inlet 17 . In other words, in order for the washing place drainage to flow into the bathtub-side inlet 17, the wall member 40 needs to change the flow path direction at least twice. Therefore, backflow of washing place waste water is prevented.

Bathtub drainage flows into the wall member 40 from the bathtub-side inlet 17 and is linearly guided to the outlet 19 . At this time, on the downstream side of the wall member 40, the bathtub drain spreads rightward from the first opening 43F and flows into the outlet 19, or spreads leftward from the second opening 43S and flows into the outlet 19. Since the outflow port 19 has a sufficient width in the left-right direction, the drainage from the bathtub flows out without overflowing in the receiving portion 13 . When the outflow of washing place drainage and bathtub drainage is stopped, sealed water accumulates up to the sealed water surface F inside the receiving part 13 and the outflow part 14 . This prevents the backflow of odor from the external lead-out pipe and the invasion of pests.

According to the embodiment configured as described above, the following effects are obtained.

The drain trap 10 has a receiving portion 13 . Washing place drainage and bathtub drainage flow into the receiving portion 13 . The receiving portion 13 includes a washing place side inlet 18 , a bathtub side inlet 17 , an outlet 19 and an upper wall portion 41 . Washing place drainage flows into the washing place side inflow port 18 . Bathtub drainage flows into the bathtub side inlet 17 . The washing place waste water and bathtub waste water that have flowed in flow out from the outflow port 19 . The upper wall portion 41 is positioned above the bathtub-side inlet 17 in the receiving portion 13 . According to this configuration, the washing area drainage that has flowed into the receiving portion 13 does not directly flow into the bathtub side inlet 17 due to the upper wall portion 41 positioned above the bathtub side inlet 17 . Therefore, it is possible to prevent backflow of washing place drainage to the bathtub side.

The upper wall portion 41 extends downward from the bathtub-side inlet 17 toward the outlet 19 . According to this configuration, washing place drainage is guided along the upper surface of the upper wall portion 41 toward the outflow port 19 side. Therefore, it is possible to more reliably prevent the washing place drainage from flowing back to the bathtub side.

The upper wall portion 41 constitutes the wall member 40 . The wall member 40 changes the direction of the flow path of the washing place waste water twice or more when assuming the flow path of the washing place waste water from the washing place side inlet 18 to the bathtub side inlet 17 . According to this configuration, the washing place drainage does not reach the bathtub side inlet 17 unless the flow direction is changed two or more times. Therefore, it is possible to prevent backflow of washing place drainage to the bathtub side.

<Other embodiments>
The present disclosure is not limited to the embodiments described by the above description and drawings, and the following embodiments are also included in the technical scope of the present disclosure.
(1) In the above embodiment, the first side wall portion 42F and the second side wall portion 42S of the wall member 40 are provided with the first opening portion 43F and the second opening portion 43S. Alternatively, as shown in FIG. 10 , an opening 58 that opens vertically 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 where 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, hits the upper surface of the upper wall portion 41, changes its direction obliquely forward and downward, and flows from the opening portion 58 into the wall. It flows into the inside of the member 40 and then does not flow into the bathtub side inlet 17 unless the direction is changed to the rear side. In other words, the washing place waste water does not reach the bathtub side inlet 17 unless the flow direction is changed 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 the bathtub pan 95 . Not limited to this, the drain trap 10 can also be applied to a bathroom unit that does not have a bathtub pan.
(3) In the above embodiment, the wall member 40 includes a first side wall portion 42F and a second side wall portion 42S. Not limited to this, the wall member may not 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 42F and the second side wall 42S, respectively. Alternatively, the opening may not be formed in both or either one of the first side wall and the second side wall.

DESCRIPTION OF SYMBOLS 10... Drain trap, 13... Receiving part, 17... Bathtub side inlet, 18... Washing place side inlet, 19... Outlet, 40... Wall member, 41... Upper wall part, 42F... First side wall part (side wall part) , 42S... second side wall (side wall), 43F... first opening (opening), 43S... second opening (opening), 58... opening

Claims (5)

Equipped with a receiving part into which washing place wastewater and bathtub wastewater flow,
The receiving portion includes a washing place side inlet into which the washing place wastewater flows, a bathtub side inlet into which the bathtub wastewater flows, an outflow port from which the washing place wastewater and the bathtub wastewater flow out, and a top wall positioned above the tub-side inlet. 2. The drain trap according to claim 1, wherein said upper wall extends downwardly from said bathtub-side inlet toward said outlet. The upper wall portion constitutes a wall member that changes the flow direction of the flow channel two or more times when assuming a flow channel for the washing space drainage from the washing space side inlet to the bathtub side inlet. A drain trap according to any one of claims 1-2. The wall member has a side wall portion hanging down from the upper wall portion,
4. The drain trap according to claim 3, wherein said side wall portion has an opening opening in the left-right direction on a downstream side from said bathtub-side inlet toward said outlet. 4. The drain trap according to claim 3, wherein said upper wall portion has an opening opening vertically on a downstream side from said bathtub side inlet toward said outlet.

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