JP6710507B2 - Flush toilet - Google Patents

Description

The present invention relates to a flush toilet bowl, and more particularly, to a structure of an overflow path for discharging an excess cleaning medium.

In the flush toilet bowl, a cleaning method is known in which flush water is discharged from one or more water discharge pipes to push out dirt in the toilet bowl. Specifically, when the user gives an instruction for cleaning, the cleaning water in the tank is discharged from the water discharge pipe. After washing, new wash water is taken from the water supply and stored in the built-in tank.

Considering the possibility that washing water may overflow from the tank, a water pipe (water passage) called an overflow pipe (overflow passage) may be installed in the tank. When the amount of water stored in the tank becomes equal to or more than the threshold value, the excess cleaning water is discharged through the overflow pipe. The overflow pipe may be directly connected to a sewer pipe or the like, or may be connected to a water discharge pipe.

Since the overflow pipe is connected to the tank, if foreign matter enters from the overflow pipe, the foreign matter may enter the tank. In order to prevent this, in Patent Document 1, a mesh filter 59 is formed in the middle of the overflow drainage channel 40 (overflow pipe) (see paragraph [0038] of Patent Document 1, FIG. 6).

JP, 2014-114636, A

Although the filter can block foreign substances, it limits the amount of water passing through the overflow pipe. It is not preferable to limit the amount of water flowing through the overflow pipe, assuming that a large amount of overflow will occur when tap water is left undisturbed. If the filter is made coarser, the water flow can be made relatively large, but small foreign matter may pass through the filter. When a filter is provided, there is a trade-off between foreign matter prevention and water flow rate.

The present invention has been made based on the recognition of the above problems, and a main object thereof is to provide a technique for efficiently preventing foreign matter from entering an overflow pipe of a flush toilet bowl.

A flush toilet according to an aspect of the present invention is a flush toilet that includes a first tank for storing a first cleaning medium, a water discharge pipe for discharging the first cleaning medium, and a first tank for the first tank. An overflow path for discharging the excess amount of the first cleaning medium when the storage amount of the cleaning medium exceeds a threshold value.
The overflow path has a storage section that stores the first cleaning medium on the path.

According to the present invention, it becomes easy to efficiently prevent foreign matter from entering the overflow pipe of a flush toilet.

It is a front perspective view of a flush toilet bowl. FIG. 3 is an enlarged perspective view of the inside of the rear end of the flush toilet bowl. It is an expansion perspective view near the rear end surface of a flush toilet bowl. It is a rear perspective view of a flush toilet bowl. It is an external appearance perspective view of a water discharge pipe. It is a 1st schematic diagram for demonstrating the flow of wash water and detergent in a flush toilet bowl. It is a 2nd schematic diagram for demonstrating the flow of wash water and detergent in a flush toilet bowl. It is a sectional side view of the flush toilet in AA of FIG. It is a sectional side view of the flush toilet in BB of FIG. It is an enlarged view of the area|region R of FIG. It is a side view of the supply pipe in a modification.

FIG. 1 is a front perspective view of a flush toilet 100.
The flush toilet 100 has a tank (first tank) and a pump (described later in FIG. 2) built therein. The pump discharges the cleaning water (first cleaning medium) stored in the tank from the first spout 102 and the second spout 104 to the toilet bowl 106. The cleaning water discharged from the second water outlet 104 flows on the water guiding shelf 108 (rail) formed on the inner wall surface of the toilet bowl 106, and merges with the cleaning water discharged from the first water outlet 102. The inside of the toilet bowl 106 is swirled to drop water. As will be described later in detail, actually, bubbles that are a mixture of detergent (second cleaning medium), cleaning water and air are also discharged from the second water outlet 104. Hereinafter, a mixture of detergent, cleaning water, and air will be simply referred to as “foam”.
A functional part (not shown) that provides a local cleaning function, a warm air function, etc. may be mounted on the rear end of the flush toilet 100.

FIG. 2 is an enlarged perspective view of the inside of the rear end of the flush toilet 100. FIG. 3 is an enlarged perspective view of the vicinity of the rear end surface of the flush toilet 100. FIG. 4 is a rear perspective view of the flush toilet 100. FIG. 5 is an external perspective view of the water discharge pipe.
A water supply pipe (not shown) penetrates through the water intake 110 (see FIG. 3) on the rear surface of the flush toilet 100, and the water supply pipe is connected to the water supply. The wash water taken in enters the first tank 116 via the supply pipe 112 (see FIG. 2) (path C1 in FIG. 2). More specifically, in the first tank 116, it enters the water receiving portion 114 which is a portion formed on the upper portion of the first tank 116, and the wash water of the water receiving portion 114 is a lower tank 115 (which is a lower region of the first tank 116 2 (see FIG. 2) (path C2 in FIG. 2).

When the user operates a washing switch (not shown), a pump (not shown) at the bottom of the flush toilet 100 is activated, and the flush water in the lower tank 115 is spouted 118 (see FIGS. 2 and 5). (Route C3 in FIG. 2). The water discharge pipe 118 is a bifurcated pipe that branches from the main pipe 124 into two pipes, a first water discharge pipe 120 and a second water discharge pipe 122 (see FIG. 5 ). The cleaning water flowing into the first water discharge pipe 120 is discharged from the first water discharge outlet 102 as it is via the first water conduit 119 (path C3-1 in FIG. 2, water flow B in FIG. 3).

The second tank 126 stores the detergent (second cleaning medium). The detergent in the second tank 126 is mixed with bubble water (a mixture of air and water) generated by the ejector 128 to form bubbles, and enters the second water discharge pipe 122 from the discharge port 130 via the foam pipe 57 (FIG. 2). Route C4). The detergent in the second tank 126 is sent to the ejector 128 by the pump 54. Further, tap water is directly supplied to the ejector 128 via a water supply pipe and a bubble valve 117. The bubbles are discharged from the second water outlet 104 via the second water conduit 123 (path C3-2 in FIG. 2, water flow A in FIG. 3 ). The ejector 128 is an application of existing technology. Either the cleaning water or the foam is discharged from the second water discharge pipe 122.

Although details will be described later, the water receiving portion 114 communicates with not only the lower tank 115 but also the overflow pipe 132 (see FIG. 5). The washing water in the water receiving portion 114 is supplied to the lower tank 115, but if the amount of water stored in the lower tank 115 becomes too large, the washing water overflows from the water receiving portion 114. Therefore, the water receiving unit 114 prevents excess water from overflowing by flowing excess wash water into the overflow pipe 132. The overflow pipe 132 discharges excess water from the discharge port 134, but the discharge port 134 in the present embodiment is connected to the second water discharge pipe 122 (see FIG. 5). Therefore, excess water in the water receiving portion 114 is discharged into the toilet bowl portion 106 via the overflow pipe 132 and the second water discharge pipe 122.

FIG. 6 is an overall schematic diagram for explaining the flow of flush water and detergent in the flush toilet 100. FIG. 7 is a more detailed schematic diagram for explaining the flow of flush water and detergent in the flush toilet bowl 100.
The flush toilet 100 includes a valve unit 113. The valve unit 113 is connected to the water supply pipe 156 connected to the water supply. The water supply pipe 156 is a pipe for taking in the wash water penetrating the water intake 110 from the tap water. The valve unit 125 includes a cleaning valve 121 and a foam valve 117. The cleaning valve 121 and the foam valve 117 are never open at the same time. When the cleaning valve 121 is opened, the cleaning water enters the water receiving section 114 via the supply pipe 112 (path C1). The wash water in the water receiving portion 114 flows into the lower tank 115 located below as it is and is stored in the lower tank 115 (path C2).

When the user operates a washing switch (not shown), the washing water pump 156 (see FIG. 6) at the bottom of the flush toilet 100 is activated, and the washing water in the lower tank 115 is sent to the water discharge pipe 118 (route). C3). The water discharge pipe 118 branches from the main pipe 124 into two pipes, a first water discharge pipe 120 and a second water discharge pipe 122. The cleaning water flowing from the main pipe 124 to the first water discharge pipe 120 is discharged from the first water discharge outlet 102 via the first cleaning water conduit 105 (path C3-1). On the other hand, the wash water flowing from the main pipe 124 to the second water discharge pipe 122 is discharged from the second water discharge port 104 via the second wash water conduit 107 (path C3-2).

The water receiving part 114 communicates not only with the lower tank 115 but also with the overflow pipe 132 forming an overflow path through the partition wall 140 (see FIG. 7 ). The wash water in the water receiving section 114 is supplied to the lower tank 115, but if the amount of water stored in the lower tank 115 becomes too large due to a failure of the valve unit 125 or the like, the wash water will overflow from the water receiving section 114. Therefore, the water receiving unit 114 prevents excess water from overflowing by flowing excess wash water into the overflow pipe 132. The overflow pipe 132 discharges excess water from the discharge port 134, but the discharge port 134 in the present embodiment is connected to the second water discharge pipe 122 (see FIG. 5). Therefore, the surplus water in the water receiving portion 114 is discharged into the toilet bowl portion 106 via the second flush water conduit 107 and the second water outlet 104.

The routes C1, C2, C3, C3-1 and C3-2 described above constitute a wash water conduit for guiding wash water toward the toilet bowl 106. That is, the first water outlet 102 or the second water outlet 104 (up to the front of the toilet bowl 106) is the flush water conduit. The flush toilet 100 according to the present embodiment is provided with a bubble path (route C4) for guiding bubbles toward the toilet bowl 106, in addition to the flush water conduit.

The detergent in the second tank 126 is sent to the ejector 128 by the pump 54 to form bubbles, and enters the second water discharge pipe 122 from the bubble discharge port 130. Bubbles or cleaning water is discharged from the second water discharge pipe 122.

The pump 136 is driven for a certain period of time to discharge the wash water to the toilet bowl 106, and then new wash water is replenished to the lower tank 115 from the replenishment pipe 112. Although the cleaning water is supplied from the supply pipe 112 for a certain period of time, the supply amount thereof is controlled so as not to get over the partition wall 140. As described above, the water level of the wash water may get over the partition wall 140 of the water receiving unit 114 for some reason, such as an abnormality in the pump 136 or each water passage. In this case, the excess cleaning water flows into the overflow pipe 132. The wash water in the overflow pipe 132 is discharged (discarded) from the second water discharge pipe 122 as described above.

Since the overflow pipe 132 is opened to the outside through the second water discharge pipe 122, foreign matter may enter the overflow pipe 132 from the second water discharge port 104. The foreign matter may be dust or pebbles, or a creature such as a cockroach, a fly, or a mosquito. The foreign matter that has entered the overflow pipe 132 may further enter the lower tank 115 via the water receiving portion 114.
Further, in the present embodiment, bubbles are supplied to the second water discharge pipe 122. Therefore, it is possible that bubbles generated in the second water discharge pipe 122 may flow back into the overflow pipe 132 and enter the first tank 116. Detergent (foam) is also a foreign matter for the first tank 116.
Therefore, as a countermeasure against such foreign matter intrusion, in the present embodiment, the overflow pipe 132 forms a storage portion 138 (trap).

FIG. 8 is a side sectional view of the flush toilet 100 in AA of FIG. FIG. 9 is a side sectional view of the flush toilet bowl 100 taken along the line BB of FIG. FIG. 10 is an enlarged view of the region R of FIG.
The description will be centered on FIG. The overflow pipe 132 in the present embodiment has a horizontal portion 144 that extends in the horizontal direction and a vertical portion 146 that extends in the vertical direction, and the storage portion 138 is provided at the joint portion (bent portion) of the horizontal portion 144 and the vertical portion 146. It is formed. The storage part 138 has a bottom surface at a position lower than the bottom surface of the horizontal part 144, and may be a region (pocket) capable of storing a fixed amount of the stored water 142. When the storage portion 138 formed at the bent portion of the overflow path (overflow pipe 132) becomes full of water, the overflow path is blocked (sealed) by the wash water. A separation wall 148 is provided between the horizontal portion 144 and the vertical portion 146. It is desirable that the tip of the separation wall 148 extends to a position lower than the water level of the stored water 142 (when the water is full). In other words, if the overflow pipe 132 is formed such that the tip of the separation wall 148 of the vertical portion 146 is lower than the bottom surface of the horizontal portion 144, the horizontal portion 144 and the vertical portion 146 can be completely separated by the stored water 142.

The foreign matter that has entered the overflow pipe 132 (horizontal portion 144) from the second water outlet 104 drops into the stored water 142 of the storage portion 138, and therefore cannot climb the vertical portion 146 and enter the water receiving portion 114 or the first tank 116. .. In particular, when the stored water 142 is full, the horizontal portion 144 and the vertical portion 146 are blocked by the stored water 142. Therefore, even flying insects such as flies and mosquitoes do not pass through the stored water 142, and the vertical portion is prevented. It cannot reach 146. Even when the water is not full, at least the non-flying insects such as ants can be captured by the stored water 142.

Note that, in FIG. 10, the separation wall 148 is in contact with the water surface at a position where the water surface of the storage section 138 when the storage section 138 is full is roughly divided into two. More specifically, the area ratio of the opening A1 connecting the vertical portion 146 and the storage portion 138 and the opening A2 connecting the horizontal portion 144 and the storage portion 138 is preferably 1:1 and at least the area difference is within 10%. Thus, the separation wall 148 is slightly inclined rearward. This is because if one of the openings A1 and A2 is excessively wide and the other is excessively narrow, the water passage through the narrower opening is restricted. By making the areas of the openings A1 and A2 uniform, water can flow through the overflow pipe 132 smoothly.

Since bubbles are supplied to the second water discharge port 104 in the present embodiment, the horizontal portion 144 may be filled with bubbles. Also in this case, bubbles can be prevented from climbing the vertical portion 146 due to the defoaming effect of the stored water 142.

Moreover, in the present embodiment, it is not necessary to interpose a water flow restrictor such as a filter in the overflow pipe 132, so that even when a large amount of overflow water is generated, the excess water can be promptly discharged from the second spout 104. .. Construction is easy because no additional parts such as filters are required. Of course, the reservoir 138 and the filter may be used together.

FIG. 11 is a side view of the supply pipe 113 in the modified example.
Although the supply pipe 112 of the present embodiment supplies the cleaning water only to the water receiving portion 114, the supply pipe 113 shown as a modified example in FIG. 11 includes not only the main discharge port 152 but also the auxiliary discharge port 154. The cleaning water supplied from the water intake 110 enters the replenishment pipe 113 from the water supply port 150, and is simultaneously discharged from the main discharge port 152 and the sub discharge port 154. The main discharge port 152 discharges the wash water to the water receiving portion 114, and the sub discharge port 154 discharges the wash water directly to the overflow pipe 132. The cleaning water supplied to the overflow pipe 132 flows into the toilet bowl 106 through the second water outlet 104 as it is, and accumulates at the bottom of the toilet bowl 106 to become accumulated water.

The main discharge port 152 and the sub discharge port 154 have different inner diameters. The inner diameter ratio of each discharge port is adjusted so that less than 50%, preferably about 10 to 20% of the supply amount of cleaning water is discharged from the auxiliary discharge port 154.
Hereinafter, each of the case 1 without the auxiliary discharge port 154 and the case 2 including the auxiliary discharge port 154 will be described.

<Case 1: When only the main outlet 152 exists>
For convenience of explanation, the capacity of the first tank 116 (water receiving portion 114 and lower tank 115) is 100, and the amount of accumulated water in the toilet bowl portion 106 is 10. Further, it is assumed that all the wash water in the first tank 116 is discharged when the user gives a wash instruction.

When the user issues a cleaning instruction, the pump 136 discharges the cleaning water (total amount 100) of the first tank 116. Of the total wash water in the first tank 116 (amount 100), the amount 90 of wash water is discharged to the sewer together with the amount 10 of retained water, while the remaining amount 10 becomes new retained water. After the washing, new washing water is taken in through the water intake 110, and the empty first tank 116 is again filled with the washing water in an amount of 100.

<Case 2: When the sub outlet 154 exists in addition to the main outlet 152>
It is assumed that 90% of the cleaning water that has flowed in from the water supply port 150 is discharged from the main discharge port 152, and the remaining 10% is discharged from the sub discharge port 154. The capacity of the first tank 116 is 90 (rather than 100), and the amount of accumulated water in the toilet bowl 106 is 10. Further, it is assumed that all the wash water in the first tank 116 is discharged when the user gives a wash instruction.

When the user issues a cleaning instruction, the pump 136 discharges the cleaning water (total amount 90) of the first tank 116. The total washing water (quantity 90) in the first tank 116 is discharged to the sewer together with the quantity 10 of accumulated water. After cleaning, a quantity of cleaning water of 100 is taken from the water intake 110. 90% (amount 90) of wash water of the amount 100 is poured into the first tank 116, and 10% (amount 10) of wash water is supplied from the auxiliary discharge port 154 to the overflow pipe 132 and the second water outlet 104. It is poured directly into the toilet bowl 106 via the water and becomes accumulated water.

In case 1, of the 100 washing water in the first tank 116, 10 is the accumulated water. In case 2, all the washing water of the amount 90 in the first tank 116 is used for washing, and the accumulated water of the amount 10 is supplied from the overflow pipe 132 without passing through the first tank 116. Since the capacity of the first tank 116 in the case 2 can be made smaller, the flush toilet bowl 100 can be easily downsized.

Originally, the overflow pipe 132 is used only when an abnormal situation such as overflow occurs, so that the inside is easily soiled. According to the case 2, since the washing water is always flown through the overflow pipe 132 during washing, the overflow pipe 132 can be easily kept clean.

The present invention has been described above based on some embodiments. Those skilled in the art will understand that these embodiments are exemplifications, that various modifications and changes are possible within the scope of the claims of the present invention, and that such modifications and changes are also within the scope of the claims of the present invention. It is about to be done. Therefore, the description and drawings in this specification should be treated as illustrative rather than limiting.

Since the discharge port 134 of the overflow pipe 132 in the present embodiment is connected to the second water discharge pipe 122, surplus water is discharged via the second water discharge pipe 122. As a modified example, the excess water may be directly drained from the outlet 134 to the toilet bowl 106, the sewer pipe or the like without connecting the outlet 134 to the discharge pipe 118. As described above, although it is not always necessary to connect the overflow pipe 132 and the water discharge pipe 118, if the overflow pipe 132 and the water discharge pipe 118 are connected, it is easy to effectively use the space in the flush toilet bowl 100.

In the present embodiment, the first cleaning medium stored in the first tank 116 is “water (cleaning water)”, and the second cleaning medium stored in the second tank 126 is “detergent”. The first cleaning medium may be a detergent and the second cleaning medium may be water. Alternatively, both may be detergents or both may be water. Further, the first cleaning medium and the second cleaning medium may be different kinds of detergents having different air bubbles (easiness of foaming). The overflow pipe 132 may be formed as a straight pipe having no bent portion, for example, a straight pipe extending in the downward inclination direction. Also in this case, the storage portion 138 may be formed as a pocket for storing the cleaning water on the path. Even if the overflow pipe 132 cannot be blocked by the wash water in the storage section 138, it has the effect of eliminating non-flying insects such as ants.

From the above description, the following inventions are recognized.
The flush toilet includes a first tank that stores a first cleaning medium, a water discharge pipe that discharges the first cleaning medium, and a storage amount of the first cleaning medium in the first tank that exceeds a threshold value. And an overflow path for discharging an excess of the first cleaning medium.
The overflow path has a storage section that stores the first cleaning medium on the path.
By providing such a storage unit, it becomes easy to prevent foreign matter from entering the first outlet tank from the outlet of the overflow pipe.

The overflow path may have a bend. The storage part may be formed in a bent portion and may be formed so as to be capable of blocking the overflow path by storing the first cleaning medium by the first cleaning medium.

The overflow path may have a shape that bends from a vertical direction to a horizontal direction.

The overflow path may communicate with the water discharge pipe.

The flush toilet may further include a second tank that stores a second cleaning medium. In addition to the first cleaning medium, the water discharge pipe may be supplied with the second cleaning medium from the second tank. The second cleaning medium may be a medium having a bubble property.

The separation wall may be inserted into the storage unit from above, and the separation wall may be inserted at a position where the water surface when the first cleaning medium is stored in the storage unit to the maximum extent is roughly divided into two.

The flush toilet 100 may further include a supply pipe for supplying the first cleaning medium to the first tank. The supply pipe may supply a smaller amount of the first cleaning medium to the overflow path than the supply amount of the first cleaning medium to the first tank.

50 foam generator, 54 pump, 57 foam pipe, 100 flush toilet, 102 first spout, 104 second spout, 106 toilet bowl, 108 water transfer rack, 110 water intake, 112, 113 supply pipe, 114 receiving Water portion, 115 lower tank, 116 first tank, 117 foam valve, 118 water discharge pipe, 119 first water discharge path, 120 first water discharge pipe, 121 cleaning valve, 122 second water discharge pipe, 123 second water discharge path, 124 main pipe , 125 valve unit, 126 second tank, 128 ejector, 130 foam discharge port, 132 overflow pipe, 134 discharge port, 136 pump, 138 storage part, 140 partition wall, 142 stored water, 144 horizontal part, 146 vertical part, 148 separation Wall, 150 water inlet, 152 main outlet, 154 sub outlet, 156 water pipe.

Claims (7)

A first tank for storing a first cleaning medium;
A water discharge pipe for discharging the first cleaning medium;
An overflow path for discharging the excess amount of the first cleaning medium when the storage amount of the first cleaning medium in the first tank exceeds a threshold value,
The flush toilet according to claim 1 , wherein the overflow path has a storage section that stores the first cleaning medium that blocks the overflow path . A first tank for storing a first cleaning medium;
A water discharge pipe for discharging the first cleaning medium;
An overflow path for discharging the excess amount of the first cleaning medium when the storage amount of the first cleaning medium in the first tank exceeds a threshold value,
The overflow path, reservoir for storing the first cleaning medium on its path, have a,
Before SL overflow path has a bent portion,
The reservoir is formed in the bent portion, the first cleaning medium the overflow path of the first water wash toilet you characterized in that it is cut off can be formed by the cleaning medium by storing .. The flush toilet bowl according to claim 2, wherein the overflow path has a shape that bends from a vertical direction to a horizontal direction. The flush toilet bowl according to claim 1, wherein the overflow path communicates with the water discharge pipe. A second tank for storing a second cleaning medium,
The flush toilet bowl according to claim 3, wherein, in addition to the first cleaning medium, the second cleaning medium is also supplied from the second tank to the water discharge pipe. A first tank for storing a first cleaning medium;
A water discharge pipe for discharging the first cleaning medium;
An overflow path for discharging the excess amount of the first cleaning medium when the storage amount of the first cleaning medium in the first tank exceeds a threshold value,
The overflow path, reservoir for storing the first cleaning medium on its path, have a,
The front Symbol reservoir, upward from the separation wall is inserted, and wherein the separation wall is inserted into substantially bisected located the water surface when the first cleaning medium to the reservoir is retained in the maximum water washing toilet characterized the Rukoto. A first tank for storing a first cleaning medium;
A water discharge pipe for discharging the first cleaning medium;
An overflow path for discharging the excess amount of the first cleaning medium when the storage amount of the first cleaning medium in the first tank exceeds a threshold value,
The overflow path, reservoir for storing the first cleaning medium on its path, have a,
The prior Symbol in reservoir lowest position of the first cleaning medium, flushing toilet, characterized in that provided at a position lower than the opening of the water discharge pipe for discharging the first cleaning media.

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