JP6029210B2 - Bath tub drain trap and bathroom unit using the tub pan drain trap - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a bathtub pan drain trap attached to a bathtub pan that receives a bathtub and a bathroom unit using the bathtub pan drain trap.

  In the bathroom unit, the bathtub is installed so that it is received by the bathtub pan, and even if the bathtub itself is cracked or the drainage pipe connecting the drain outlet and the drain trap is incomplete, there is a leak. By draining hot water or water leaking from the bathtub pan from the bathtub pan drainage outlet provided at the bottom of the bathtub pan to the drainage path leading to the sewage through the bathtub pan drain trap, it is possible to prevent leakage under the floor of the building. I have to.

  The above-mentioned bathtub pan drainage trap generally has a trap body having a sealed water storage part, and a drainage cylinder part of drainage overflowed from the sealed water storage part of the trap body, and the sealed water storage part has an overflow port. A water storage trough, a bathtub drain hole to which a downstream end of a bathtub drain pipe connected to a drain outlet of the bathtub is connected, and a gutter lid having a bathtub pan drain hole.

  Then, as a drain pan trap for bathtub pan as described above, the rise of the drain water level in the sealed water reservoir due to the inflow of the bath drainage, the bath pan drain hole is closed, and the drainage from the bathtub passes through the bathtub pan drain hole. A float valve that prevents the water from flowing into the bathtub pan prevents the backflow of drainage to the bathtub pan side, so that no hot water or water leaks directly from the bathtub into the bathtub pan. There is one that prevents hot water and water from entering the bathtub (Patent Documents 1 and 2). Some have a check valve instead of the float valve.

JP 2001-182118 A JP 2005-9133

However, if the product is used for a long period of time, dirt may adhere to the float valve, check valve, and around the bathtub pan drainage hole, and the float valve and check valve may adhere to the water stop surface on the bottom surface of the eye plate. There is a possibility that hair contained in the drainage may adhere to the water stop surface of the float valve or the check valve and the float valve cannot sufficiently close the bathtub pan drain hole.
Therefore, it is sometimes necessary to clean the area around the float pan or check valve and the tub pan drainage hole in the lid, but when cleaning, it is necessary to remove the apron etc. that separates the tub side from the washing area side. It is very inconvenient and troublesome for users. Therefore, there is a tendency to leave the bathtub pan in a dirty state.

On the other hand, there are some things that facilitate maintenance without a valve, such as closing the bathtub pan drain hole in the lid, but if the conventional float valve is not used, a large amount of drainage from the bathtub is sealed. Even if a large amount of drainage from the bathtub flows into the water reservoir and into the sealed water reservoir, drainage from the bathtub may flow back into the bathtub pan from the bathtub pan drain hole in the eye plate. Sufficient depth of the sealed water storage part of the trap must be taken, and the height dimension of the drain pan trap for bathtub pan becomes high.
Therefore, the gap between the bathtub pan and the building floor where the bathtub pan is to be installed must be increased. As a result, if the floor surface height on the washing pan side is not increased, the bathtub installed on the bathtub pan must be installed. The straddle height becomes high.
However, raising the floor height on the side of the wash basin lowers the ceiling height of the wash basin and creates a level difference between the bathroom floor and the floor FL of the adjacent room such as the dressing room and wash room. There is a problem that it cannot be barrier-free.

In general, the drainage path from the tub pan drainage trap and the drainage path from the wash basin are joined together and flow into the sewage path. If it flows into the junction with the side drainage channel and the inside of the drainage channel becomes negative pressure, there is a high possibility that the sealing water on the side of the washing basin is broken and a “gobogobo” sound is generated.
Therefore, in a housing complex such as a mid-to-high-rise housing, this broken sound may affect the downstairs and adjacent rooms, resulting in noise problems.

  In view of the above circumstances, the present invention makes it easy to maintain and maintain the drainage of the bathtub without flowing back to the bathtub pan side without providing a float valve for closing the drainage hole for the bathtub pan, and reducing the thickness. The bathtub floor drain trap and the bathtub pan drain trap, which can reduce the floor of the washing area even when the height of the bathtub straddling is lowered, can prevent the generation of a break-off sound when the bathtub is drained. The purpose is to provide a used bathroom unit.

  In order to achieve the above object, a drain pan trap for bathtub pan according to the present invention comprises a trap body having a sealed water storage section, and a drain cylinder portion of drainage overflowed from the sealed water storage section of the trap body, The water reservoir includes a water reservoir having an overflow port, a bathtub drain hole to which a downstream end of a bathtub drain pipe connected to the drain port of the bathtub is connected, and a lid part having a bathtub pan drain hole A drain trap for bathtub pan, wherein the sealed water reservoir has a first overflow opening that faces the bathtub drain hole from below through a partition wall and has a first overflow port connected to the drain cylinder, and The second overflow is separated from the second overflow water storage portion having a second overflow port that faces the bathtub pan drainage hole from below and is connected to the drain tube portion downstream from the first overflow port. Is the drainage from the bathtub overflowed from the first overflow port, and the sealed water stored in the second sealed water storage unit due to the downstream side of the second overflow port of the drainage cylinder part becoming a negative pressure from the atmospheric pressure. A portion of the waste water that has overflowed from the first overflow port when it is sucked and drained from the second overflow port into the drain tube until it becomes a sealed state, and the overflow amount from the first overflow port is equal to or less than the drainage amount that becomes the negative pressure. Is formed in a structure that flows from the second overflow port into the second sealed water reservoir as sealed water.

  Moreover, the drain pan trap for bathtub pan according to the present invention has a trap body having a sealed water storage section, and a drainage cylinder portion of drainage overflowed from the sealed water storage section of the trap body, and the sealed water storage section overflows A drain pan trap for a tub pan provided with a storage trough having a mouth, a tub drain hole to which a downstream end portion of a tub drain pipe connected to the drain port of the bathtub is connected, and a lid portion having a tub pan drain hole And the sealed water storage section faces the bathtub drainage hole from below through a partition wall, and has a first sealed water storage section having a first overflow port connected to the drainage cylinder section, and the bathtub pan drainage hole downward. And is divided into a second sealed water storage part having a second overflow port connected to the drain cylinder part downstream from the first overflow port, and the drain cylinder part is closed on one side in the cylinder longitudinal direction. Is The end of the closed side has a first water passage part where the first overflow port opens on the side wall surface of the trap body above the bottom surface, and the bottom surface is the trap body on the downstream side of the first water passage part. A second water passage portion having an inner cross-sectional area larger than that of the first water passage portion is formed so as to widen to the side, provided on the downstream side of the second water passage portion, and the bottom is the bottom surface of the second water passage portion. A third water passage portion having a lower inner cross-sectional area is formed, and the second overflow port is wider than the first water passage portion on the bottom surface of the second water passage portion. It is characterized in that it is formed so as to communicate with the second sealed water reservoir by cutting out the first water passage side end.

  In the bathtub pan drainage trap of the present invention, it is preferable that the lid portion is provided with a sealed cylinder communicating with the bathtub pan drainage hole on the lower surface side thereof. Moreover, you may make it provide a sealing cylinder so that it may face a bathtub drain hole.

In the bathroom unit according to the present invention, the drain pan trap for the bathtub pan of the present invention is attached to the bathtub pan, and the drain tube portion of the drain trap for the toilet pan attached to the wash pan provided continuously to the bathtub pan is provided. It is characterized in that it is connected and connected so as to join the drain pipe.
Further, in the bathroom unit of the present invention, the height of the lower end of the second overflow port is substantially the same as the maximum sealed water position of the sealing trap for the washing place bread so that the floor can be lowered most. preferable.

The drain pan trap for bathtub pan according to the present invention has a trap body having a sealed water reservoir and a drainage cylinder portion of drainage overflowed from the sealed water reservoir of the trap body, and the sealed water reservoir has an overflow port. A drain pan trap for a bathtub pan comprising a storage trough portion, a bathtub drain hole to which a downstream end portion of a bathtub drain pipe connected to a drain outlet of the bathtub is connected, and a lid portion having a bathtub pan drain hole. The sealed water storage section faces the bathtub drain hole from below through a partition wall, and the first sealed water storage section having a first overflow port connected to the drain cylinder section and the bathtub pan drain hole faces from below. And a second sealed water storage part having a second overflow port connected to the drain tube part downstream from the first overflow port, wherein the second overflow port is connected to the first overflow port. The drainage from the bathtub overflowed from the mouth until the sealed water stored in the second sealed water reservoir becomes broken by the downstream side of the second overflow port of the drainage cylinder part becoming a negative pressure from the atmospheric pressure. When the drainage is sucked and drained from the second overflow port into the drain cylinder and the overflow amount from the first overflow port is equal to or less than the drainage amount at which the negative pressure is reached, a part of the drainage overflowing from the first overflow port is discharged from the second overflow port. It is formed in a structure that flows into the second sealed water reservoir as sealed water.
Moreover, the drain pan trap for bathtub pan according to the present invention has a trap body having a sealed water storage section, and a drainage cylinder portion of drainage overflowed from the sealed water storage section of the trap body, and the sealed water storage section overflows A drain pan trap for a tub pan provided with a storage trough having a mouth, a tub drain hole to which a downstream end portion of a tub drain pipe connected to the drain port of the bathtub is connected, and a lid portion having a tub pan drain hole And the sealed water storage section faces the bathtub drainage hole from below through a partition wall, and has a first sealed water storage section having a first overflow port connected to the drainage cylinder section, and the bathtub pan drainage hole downward. And is divided into a second sealed water storage part having a second overflow port connected to the drain cylinder part downstream from the first overflow port, and the drain cylinder part is closed on one side in the cylinder longitudinal direction. Is The end of the closed side has a first water passage part where the first overflow port opens on the side wall surface of the trap body above the bottom surface, and the bottom surface is the trap body on the downstream side of the first water passage part. A second water passage portion having an inner cross-sectional area larger than that of the first water passage portion is formed so as to widen to the side, provided on the downstream side of the second water passage portion, and the bottom is the bottom surface of the second water passage portion. A third water passage portion having a lower inner cross-sectional area is formed, and the second overflow port is wider than the first water passage portion on the bottom surface of the second water passage portion. It is formed so as to communicate with the second sealed water reservoir by cutting out the first water passage side end.

Therefore, when draining hot water or water in the bathtub, hot water or water flows into the first sealed water reservoir, flows into the drain cylinder from the first overflow port, and the drain tube fills up with the second overflow port. When the downstream side is in a negative pressure state, the sealed water stored in the second sealed water reservoir from the second overflow port is sucked into the drain tube section, and the sealed water in the second sealed water reservoir is broken. .
That is, the air in the bathtub pan enters into the drainage flowing through the drainage cylinder, and the drainage becomes negative pressure at the junction of the drainage pipe of the drainage trap for the washing place pan, and the sealed water of the drainage trap for the washing place pan is sucked There is no such thing as a broken sound in the bathroom.
In addition, since the second sealed water reservoir is kept in a broken state while the amount of water discharged from the bathtub is large, the water discharged from the bathtub does not enter the bathtub pan drain hole even if a valve is not provided in the bathtub pan drain hole portion. It does not flow back to the bathtub pan side.

Then, when the amount of drainage decreases and becomes equal to or less than the amount of drainage where the downstream side from the second overflow port becomes negative pressure, a part of the drainage flowing through the drainage cylinder part flows into the second sealed water storage part from the second overflow port, and again 2 The sealed water reservoir is filled with sealed water.
Therefore, it is possible to reliably prevent the foul odor from the sewer channel side from entering the bathtub pan side.

In the bathroom unit of the present invention, the bathtub pan drain trap of the present invention is attached to the bathtub pan, and the drain pipe of the bathtub pan drain trap is attached to the washing pan connected to the bathtub pan. Since it joins the drainage pipe of the drain trap for bread, the height of the tub straddling can be lowered, and the washing floor can be lowered.
Moreover, even if a large amount of hot water or water is drained from the bathtub, the sealing water in the drain trap for the washing place pan is not broken. Therefore, it is possible to prevent the occurrence of a breaking sound called “gobogobo” when draining hot water or water in the bathtub.

It is a top view showing one embodiment of a drain pan trap for bathtub pan concerning the present invention. It is a front view of the drain pan trap for bathtub pans of FIG. It is a partially cutaway perspective view of the bathtub pan drain trap of FIG. It is XX sectional drawing of FIG. It is YY sectional drawing of FIG. It is a figure which compares and demonstrates the inner cross-sectional area of a 1st water flow part and a 3rd water flow part. It is a figure which compares and demonstrates the inner cross-sectional area of a 1st water flow part and a 2nd overflow port. It is principal part sectional drawing of the bathroom unit using the drain pan trap for bathtub pans of FIG. It is a perspective view explaining the connection state of the drain pan trap for bathtubs of the bathroom unit of FIG. It is the schematic explaining the flow of the waste_water | drain when the waste_water | drain from the bathtub of the drain trap for bathtub pans of FIG. It is the schematic explaining the flow of the waste_water | drain when the waste_water | drain from the bathtub of the drain pan trap for bathtubs of FIG. 1 has decreased.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
1 to 5 show one embodiment of a drain pan trap for bathtub pan according to the present invention.

As shown in FIGS. 1 to 5, the bathtub pan drain trap A includes a trap body 1 and a drain cylinder 2.
The trap body 1 includes a water reservoir 3 and a water lid 4 that covers the upper portion of the water reservoir 3.

As shown in FIG. 5, the water reservoir 3 is partitioned by a partition wall 31 into a first sealed water reservoir 32 and a second sealed water reservoir 33.
The first sealed water reservoir 32 is provided with an overflow port 32a in the shape of a rectangular hole that is long in the horizontal direction on the partition wall 21a provided in the first water passage 21 of the drain cylinder 2 described later. The lower end edge of the hole is at a position higher than the bottom surface (hereinafter referred to as “first bottom surface”) 21 b of the first water flow portion 21 described later.

  The upper limit of the height from the first bottom surface 21b to the first overflow line is not particularly limited as long as there is a small step between the first bottom surface 21b and the first hover flow line, but the height is too high. Then, in order to ensure that the opening area of the first overflow port is sufficiently large so that the drainage speed of the bathtub drainage does not slow down, the length of the entire drainage cylinder part is increased or the ceiling height of the drainage cylinder part is increased. It must be made high, and the entire trap cannot be made compact.

The second sealed water storage part 33 is provided in a U-shape in a plan view so as to surround the first sealed water storage part 32 from the periphery except the drain tube part 2 side, and a second water passage part 22 described later is provided. A second overflow port 33a is provided at the facing position.
The overflow line of the second overflow port 33a has the same height as the bottom surface (hereinafter, referred to as “second bottom surface”) 22a of the second water passage 22.

The lid part 4 includes a female screw cylinder part 40 having a bottom plate part 41 on the bottom surface.
The first lid 42 and the second sealed cylinder 43 are extended from the lower surface of the bottom plate 41 in the lid cover 4.

The first sealed water cylinder 42 is provided at a position facing the first sealed water reservoir 32, and the downstream end of the bathtub drain pipe P6 whose upper end is connected to a drain port (not shown) of a bathtub 8b described later. It also serves as a bathtub drainage hole.
A gap is provided between the lower end of the first sealed water cylinder 42 and the bottom of the first sealed water reservoir 32.
The gap is not particularly limited as long as the sealing height (height from the lower end of the first sealing cylinder 42 to the first overflow line) is 51 cm or more, but if the gap is too narrow, drainage from the bathtub flows into the gap. Since resistance becomes large and drainage speed | rate becomes slow, 10 cm or more is preferable.

The second sealed water cylinder 43 is provided at a position facing the second sealed water reservoir 33, and has three bathtub pan drain holes 41a drilled in the bottom plate 41 at the upper end. That is, the second sealing cylinder 43 is in communication with the upper side of the bottom plate portion 41 via the bathtub pan drain hole 41a.
In addition, a gap is provided between the lower end of the second sealed water tube 43 and the bottom of the second sealed water storage unit 33.
This gap is not particularly limited as long as the sealing height (height from the lower end of the first sealing cylinder 42 to the first overflow line) is 51 cm or more, but it is the maximum that can pass through the bathtub pan drain hole 41a of the bottom plate portion 41. What is necessary is just to be more than the length of one side of a cube (in this embodiment, the length of one side is a cube which has the dimension of the short direction of bathtub pan drainage hole 41a).

The drain cylinder portion 2 includes a first water passage portion 21, a second water passage portion 22, and a third water passage portion 23.
As described above, in the first water flow portion 21, the portion other than the first overflow port 32a is partitioned from the trap body 1 by the partition wall 21a, and the first bottom surface 21b is parallel to the overflow line of the first overflow port 32a. It has a flat surface.

The second water passage portion 22 is provided so that the second bottom surface 22a is provided continuously to the first bottom surface 21b and is widened horizontally on the trap body 1 side.
The second bottom surface 22a is a second overflow port 33a with a part of the partition wall 21a cut away. That is, the second bottom surface 22a is an overflow line of the second overflow port 33a.

The third water passage portion 23 is cylindrical, and the second bottom surface 22a portion of the second water passage portion 22 is provided so as to project in a bowl shape in the cylinder. There is a difference in level.
In this embodiment, a recess 24 is formed below the second bottom surface 22a so as to open on the third water passage 23 side. This recess 24 is provided on the structure of the molding die. If the step is formed, it may not be necessary.

In addition, the drainage cylinder part 2 is an inner cross-sectional area of the first water passage part 21 shown in FIGS. 6 and 7 (hereinafter referred to as “first water passage area”) as seen in a cross section perpendicular to the cylinder longitudinal direction. A), an inner cross-sectional area of the third water passage portion 23 shown in FIG. 6 (hereinafter referred to as “third water passage area”) b, and an inner cross-sectional area of the second overflow port 33a shown in FIG. The inner cross-sectional area of the portion excluding the first water-passing area a and the cross-sectional area of the partition wall 21a from the inner cross-sectional area of the second water-passing portion 22, hereinafter referred to as “third water-passing area”) c)
It is sufficient if b>a> c and b> a + c are satisfied.

However, when the expression P ₁ −P ₂ = ρV ₂ / (V ₂ −V ₁ ) derived from Bernoulli's theorem is used, the partition wall 21a is seen in FIGS. 6 and 7 within the range satisfying the above condition. As the first drainage area a is reduced by moving the first drainage area to the left side, the negative pressure generated when the bathtub drainage flows into the third flushing portion 23 is considered to increase. As the water area a becomes smaller, the third water passage c becomes larger, so the force for pulling the sealed water in the second sealed water reservoir 33 does not necessarily increase. And since the drainage time of bathtub drainage will become long when the 1st water flow area a becomes small, it is practically 6 minutes 30 minutes from the state in which water was stretched to the height of 80% at the time of the bathtub fullness to completion of drainage. It is preferable to set the 1st water flow area a, the 3rd water flow area b, and the 2nd water flow area c so that it may become less than second.
On the other hand, when the partition wall 21a is moved to the right side in FIG. 6 and FIG. 7 to increase the first water passage area a, the negative pressure generated when the bathtub drainage flows into the third water passage portion 23. However, as the first water passage area a becomes larger, the third water passage c becomes smaller, so that the force for pulling off the sealed water in the second water-sealing reservoir 33 is not so great. No problem. However, if the third water passage c is made too small, the water level may not return to the original sealed water level when drainage is completed.

Next, FIG. 8 shows an example of a bathroom unit of the present invention using this bathtub pan drain trap A.
That is, in this bathroom unit, as shown in FIG. 8 , the bathtub pan drain trap A faces the drain port 80 of the bathtub pan 8a above the bottom plate portion 41, and the male thread cylinder portion 82b of the bathtub pan fixing member 82 is provided. It is attached to the bathtub pan 8a by screwing it into the female screw cylinder 40 and sandwiching the periphery of the drainage port 80 between the periphery of the trap body 1 of the drain pan trap A for the bathtub pan and the flange portion 82a through the sealing material 81. It has been.

Moreover, as shown in FIG. 9, the one end part of the flexible pipe P1 is externally connected to the 3rd water flow part 23. As shown in FIG.
The plexible pipe P1 is connected to the Y-type pipe joint P2.

Although not shown, the Y-type pipe joint P2 is attached so that the side (the arrow side in FIG. 9) connected to the drainage path is slightly lowered.
In the Y-type pipe joint P2, the first short pipe P3 is connected to the washing pan pan drainage trap 7 through the 45 ° elbow P4 and the second short pipe P5.
The washing area pan drain trap 7 is attached to the washing area pan 9 as shown in FIG.
In FIGS. 8 and 9, reference numeral 71 denotes a sealed water bottle that is detachable from the drain outlet of the washing area pan 9 of the washing area pan drain trap 7.

This bathroom unit is as described above, and when the hot water or water in the bathtub 8b is drained through the bathtub drain pipe P6, the hot water or water is the bathtub drain hole of the bathtub pan drain trap A. It flows into the first sealed water reservoir 32 through the first sealed water cylinder 42.
The wastewater that has entered the first sealed water storage portion 32 normally enters the first water passage portion 21 of the drain tube portion 2 from the first overflow port 32 a and passes through the second water passage portion 22 and the third water passage portion 23. Drained into the drainage channel.

And as shown in FIG. 10, the bathtub 8b is filled with hot water or water, the amount of drainage from the bathtub 8b is large, and the negative pressure is downstream (the third water passage 23 side) from the second overflow port 33a. When it occurs, the sealed water accumulated in the second sealed water storage part 33 is sucked and drained to the third water passing part 23 side through the second overflow port 33a, and the second sealed water storage part 33 is in a sealed state. Become.
When the second sealed water storage section 33 is in a broken state, the air in the bathtub pan 8a is passed through the bathtub pan drain hole 41a, the second sealed water cylinder 43, and the second sealed water storage section 33 from the second overflow port 33a. Air is mixed into the drainage from the bathtub 8b which is sucked and flows in the drain pipe section 2.

Therefore, in the state where the drainage from the bathtub 8b continues, the air in the bathtub pan 8a is always sucked into the drainage, and the drainage from the bathtub 8b is stored in the second sealed water storage water without providing a float valve. It does not flow backward to the part 33 side and flows into the bathtub pan 8a.
And since the float valve and the check valve are not provided, dirt adheres to the periphery of the bathtub pan drainage hole, etc., and the float valve and the check valve are adsorbed on the lower surface of the lid 4 or included in the drainage. There is no problem that the hair to be attached to the water stop surface of the float valve or the check valve.

In addition, the inflow of air into the waste water prevents the negative pressure at the junction of the waste water from the waste water pan drain trap 7. Therefore, even if the amount of drainage from the bathtub 8b is large, the sealing water of the washing place drainage trap 7 is sucked and broken, and the occurrence of the breaking sound “gobogobo” in the washing place drainage trap 7 due to this breaking. Can be prevented.
In other words, when used in a mid-to-high-rise house, it is possible to solve the noise problem such as the above-mentioned gurgling sound and the sound of breaking the door ringing in the adjacent room.

On the other hand, as shown by thin arrows in FIG. 11, the amount of drainage from the bathtub 8b is reduced, and the amount of drainage overflowing from the first overflow port 32a is not negative in the first water passage 21 and in the third water passage 23. When the first water flow portion 21 becomes less than the amount of drainage that does not become full, a part of the waste water that flows from the first water flow portion 21 to the third water flow portion 23 is the second overflow port 33a and the second bottom surface. Since a part of 22a is cut away, a part of the drainage that flows through the first water passing part 21 and flows into the second water passing part 22 is second sealed water from the second overflow port 33a. It flows into the water storage part 33 so as to be sealed.
Therefore, unless the bathtub is used for a long period of time and the sealed water does not evaporate, sewage or other odor does not flow into the bathroom through the bathtub pan drain hole 41a.

Moreover, since the drainage cylinder part 2 has a level | step difference provided between the 2nd bottom face 22a and the bottom of the 3rd water flow part 23, it prevents that a waste_water | drain flows backward from the 3rd water flow part 23 by this level | step difference. it can. That is, the backflow to the second sealed water reservoir 33 is prevented.
Therefore, even if a float valve is not provided, the waste water from the washing pan side does not flow backward and does not enter the bathtub pan 8a side.

The present invention is not limited to the above embodiment.
For example, in the above-described embodiment, the first sealing cylinder is provided, but only the bathtub drain hole is provided in the lid cover part, and the lower end of the bathtub drain pipe fitted to the bathtub drain hole also serves as the sealing cylinder. Such a structure may be used.
Moreover, in said embodiment, although the bathtub drainage pipe was connected with the trap by making the lower end part fit into a 1st watertight cylinder via a bathtub drainage hole, the lower end of a bathtub drainage pipe, for example You may make it connect by fixing a part to the surface of a lid part by adhesion | attachment etc.

Hereinafter, specific examples of the present invention will be described.
Example 1
A bath pan drain trap A having the same configuration as the bath pan drain trap A shown in FIGS.

[Drain trap A for bathtub pan]
A gap between the first sealed water cylinder 42 and the bottom surface of the first sealed water reservoir 32: 11 mm
A gap between the second sealed water cylinder 43 and the bottom surface of the first sealed water storage part 32: 5 mm
Opening area of the first overflow port 32a: 20.7 cm ²
Height difference between the overflow line of the first hover flow port 32a and the first bottom surface 21b: 5 mm
1st water flow area of the 1st water flow part 21: 316mm < ² >
3rd water flow area b of the 3rd water flow part 23: 855mm < ² >.
Second water flow area c of the second overflow port 33a: 103 mm ²
Maximum height difference between the second bottom surface 22 and the third bottom surface 23: 8.5 mm
Dimensions in the short direction of the bathtub pan drain hole 41a: 4.8 mm

In the drain pan trap A for bathtub pan and the drain pan trap 7 for washing place having the above-described configuration, the first bottom surface 21b of the drain tube portion 2 is a horizontal plane, and H1 and H2 shown in FIG. 7 are H1 = 185 mm and H2 = 51 mm. The following tests were conducted.
Moreover, the straddle height of the bathtub 8b was 450 mm.

(Test 1)
The drainage water flows from the bathtub drain pipe P6 to the first sealed water reservoir 32 at a drainage amount when the bathtub is 80% full, and the drainage is allowed to flow at a rate of 20 L / min. A test was conducted to determine whether or not a breakage occurred, and whether or not there was a backflow to the bathtub pan drain trap side. There was no backflow.

(Test 2)
With the water filled up to 80% of the full amount of water in the bathtub 8b, the drain plug of the bathtub 8b is opened, and the drainage is allowed to flow from the bathtub drain pipe P6 into the first sealed water reservoir 32 to the bathtub pan 8a side. When the presence or absence of backflow was examined, no backflow was observed. The time until drainage was completed was 6 minutes 2 to 4 seconds. Then, once the second sealed water reservoir 33 was broken, drainage flowed back from the second overflow port 33a 30 seconds before drainage completion, and the water level returned to the original sealed water level when drainage was completed.

(Test 3)
Vaseline is deposited to a thickness of 3 mm on the bottom plate portion 41 so as to close the bathtub han drain hole 41a from above, and the drain plug of the bathtub 8b is opened while the bathtub 8b is fully filled with water. When drainage flowed from the bathtub drainage pipe P6 to the first sealed water storage part 32 according to the amount of drainage, it was found that the drainage opened a hole in the petrolatum, and the inside of the second sealed water storage part 33 was broken by the drainage. It was confirmed that it would be in a state.

From the test results of Example 1 above, if the drain pan trap A for the bathtub pan of the present invention is used, there is no backflow water for drainage on the bathtub pan 8b side when draining from the bathtub 88bb without using a float valve or a check valve. It can be clearly seen that a low floor height of H1 = 185 mm from the building floor to the building floor surface FL can be achieved.
In addition, when the drainage is completed, the inside of the second sealed water reservoir 33 is returned to the state filled with the sealed water, so that the state where the sewage and other odors do not flow into the bathtub pan side is always maintained unless the sealed water disappears due to evaporation. It can be seen that it can be secured.

(Example 2)
[Drain trap B for bathtub pan]
The partition wall 21a is moved 4 mm to the left when viewed in FIGS. 6 and 7 so that the first water passage area a becomes smaller, the first water passage area a is 267 mm ² , and the second water passage area c is 170 mm ² . A bathtub pan drain trap B was produced under the same conditions as the above bathtub pan drain trap A except that the above was performed.

In the drain pan trap B for the tub pan and the basin pan drain trap 7 having the above-described configuration, the first bottom surface 21b of the drain cylinder 2 is a horizontal plane, and H1 and H2 shown in FIG. 7 are H1 = 185 mm and H2 = 51 mm. The following tests were conducted.
Moreover, the straddle height of the bathtub 8b was 450 mm.

(Test 1)
The drainage water flows from the bathtub drain pipe P6 to the first sealed water reservoir 32 at a drainage amount when the bathtub is 80% full, and the drainage is allowed to flow at a rate of 20 L / min. A test was conducted to determine whether or not a breakage occurred, and whether or not there was a backflow to the bathtub pan drain trap side. There was no backflow.

(Test 2)
With the water filled up to 80% of the full amount of water in the bathtub 8b, the drain plug of the bathtub 8b is opened, and the drainage is allowed to flow from the bathtub drain pipe P6 into the first sealed water reservoir 32 to the bathtub pan 8a side. When the presence or absence of backflow was examined, no backflow was observed. The time until drainage was completed was 6 minutes 30 seconds. Then, once the second sealed water reservoir 33 was broken, drainage flowed back from the second overflow port 33a 30 seconds before drainage completion, and the water level returned to the original sealed water level when drainage was completed.

Example 3
[Drain trap C for bathtub pan]
The partition wall 21a is moved 4.5 mm to the right as viewed in FIGS. 6 and 7 so that the first water passage area a is increased, and the length of the bottom of the second water passage area c is 5 mm. A bathtub pan drain trap C was prepared under the same conditions as the above-described bathtub pan drain trap A except that the water area a was 385 mm ² and the second water passage area c was 40 mm ² .
In the drain pan trap C for the tub pan and the basin pan drain trap 7 having the above-described configuration, the first bottom surface 21b of the drain tube portion 2 is a horizontal plane, and H1 and H2 shown in FIG. 7 are H1 = 185 mm and H2 = 51 mm. The following tests were conducted.
Moreover, the straddle height of the bathtub 8b was 450 mm.

(Test 1)
The drainage water flows from the bathtub drain pipe P6 to the first sealed water reservoir 32 at a drainage amount when the bathtub is 80% full, and the drainage is allowed to flow at a rate of 20 L / min. A test was conducted to determine whether or not a breakage occurred, and whether or not there was a backflow to the bathtub pan drain trap side. There was no backflow.

(Test 2)
With the water filled up to 80% of the full amount of water in the bathtub 8b, the drain plug of the bathtub 8b is opened, and the drainage is allowed to flow from the bathtub drain pipe P6 into the first sealed water reservoir 32 to the bathtub pan 8a side. When the presence or absence of backflow was examined, no backflow was observed. The time until drainage was completed was 5 minutes 23 to 25 seconds. Then, once the second sealed water reservoir 33 was broken, drainage flowed back from the second overflow port 33a 30 seconds before drainage completion, and the water level returned to the original sealed water level when drainage was completed.

(Reference example)
A bathtub pan drain trap D was prepared by moving the partition wall 21b further to the right by 0.5 mm from the bathtub pan drain trap C. In the case of the bathtub pan drain trap D, the second sealed water reservoir 33 was broken. However, the water level did not return to the original sealed water level when drainage was completed.

A Bath pan drain trap 1 Trap body 2 Drain cylinder portion 21 First water passage portion 21a Partition wall 21b First bottom surface 22 Second water passage portion 22a Second bottom surface 23 Third water passage portion 24 Recessed portion 3 Water storage portion 31 Partition 32 1st seal water storage part 32a 1st overflow port 33 2nd seal water storage part 33a 2nd overflow port 4 Cover part 40 Female thread cylinder part 41 Bottom plate part 41a Bath pan drain hole 42 1st seal cylinder (tub drain hole)
43 2nd water seal tube 7 Drain trap for wash basin 71 Seal water tube 8b Bath tub 8a Bath tub 80 Drain port 81 Sealing material 82 Bath tub fixing member 82a Flange portion 82b Male thread tube portion 9 Wash basin pan P1 Flexible pipe P2 Y-type pipe joint P3 No. 1 Short pipe P4 45 ° elbow P5 2nd short pipe P6 Bathtub drain pipe a 1st water flow area b 3rd water flow area c 2nd water flow area

Claims (6)

A trap body having a sealed water storage part, and a drainage cylinder part of drainage overflowed from the sealed water storage part of the trap body,
The sealed water reservoir, a water reservoir having an overflow port, and
A drain pan trap for a bathtub pan comprising a bathtub drain hole to which a downstream end of a bathtub drain pipe connected to a drain outlet of the bathtub is connected, and a lid portion having a bathtub pan drain hole,
A first sealed water storage section having a first overflow port connected to the drain tube section, the sealed water storage section facing the bathtub drain hole from below via a partition;
The bathtub pan drainage hole is viewed from below, and is partitioned into a second sealed water storage part having a second overflow port connected to the drainage cylinder part downstream from the first overflow port,
The second overflow port is drainage from the bathtub that has overflowed from the first overflow port, and the downstream side of the second overflow port of the drain tube portion becomes negative pressure from the atmospheric pressure, thereby entering the second sealed water reservoir. The accumulated water is sucked and drained from the second overflow port into the drain tube until the sealed state is in a broken state, and when the overflow amount from the first overflow port becomes equal to or less than the drainage amount that becomes the negative pressure, the overflow from the first overflow port A drain trap for bathtub pan, wherein a part of the drained water is formed in a structure in which a part of the drained water flows into the second sealed water reservoir from the second overflow port as sealed water. A trap body having a sealed water storage part, and a drainage cylinder part of drainage overflowed from the sealed water storage part of the trap body,
The sealed water reservoir, a water reservoir having an overflow port, and
A drain pan trap for a bathtub pan comprising a bathtub drain hole to which a downstream end of a bathtub drain pipe connected to a drain outlet of the bathtub is connected, and a lid portion having a bathtub pan drain hole,
A first sealed water storage section having a first overflow port connected to the drain tube section, the sealed water storage section facing the bathtub drain hole from below via a partition;
The bathtub pan drainage hole is viewed from below, and is partitioned into a second sealed water storage part having a second overflow port connected to the drainage cylinder part downstream from the first overflow port,
The drain cylinder part is closed on one side in the longitudinal direction of the cylinder, and has a first water flow part in which the first overflow port opens on the side wall of the trap body above the bottom surface at an end part on the closed side,
On the downstream side of the first water flow portion, a second water flow portion having an inner cross-sectional area larger than that of the first water flow portion is formed so that the bottom surface widens toward the trap body side,
A third water flow portion is provided on the downstream side of the second water flow portion, the bottom is lower than the bottom surface of the second water flow portion, and the inner cross-sectional area is increased.
The second overflow port is formed so as to communicate with the second sealed water reservoir by cutting out a first water passage side end of a portion wider than the first water flow portion on the bottom surface of the second water passage. A drainage trap for bathtub pans characterized by being made.   The drainage cylinder section is cut by a plane orthogonal to the longitudinal direction of the cylinder, the inner cross-sectional area of the first water flow section is a, the inner cross-sectional area of the third water flow section is b, and the inner cross-sectional area of the second overflow port is The bathtub water drain trap according to claim 2, wherein b> a> c and b> a + c are satisfied when c is set to c.   The drain pan trap for bathtub pans according to any one of claims 1 to 3, wherein the lid portion is provided with a sealed water tube communicating with the bath pan drain hole on the lower surface side thereof.   The drain pan trap for a bathtub according to any one of claims 1 to 4, wherein the drain trap for the bathtub pan is attached to the bathtub pan, and the drain cylinder is attached to the washing pan connected to the bathtub pan. A bathroom unit characterized in that it is connected and connected so as to join the drainage pipe.   The bathroom unit according to claim 5, wherein the height of the overflow line of the second overflow port is substantially the same as the overflow line of the sealing water of the sealing trap for the washing place pan.

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