JP2003201730A - Low tank structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low tank stabilizing the opening action of a drain valve in the low tank while following the actuation mechanism of the existing drain valve and making the parts common. <P>SOLUTION: The low tank 3 is installed at the rear part of a toilet seal 1 with a warm water washing device 2. A hollow 4 recessed toward the inside is formed at the lower side of the front face of the low tank 3. The warm water washing device 2 is made containable in the hollow 4. A baffle plate 9 horizontally partitioning the water passage between the delivery outlet 6 of the water supply part 5 arranged above the inside of the low tank 3 and a drain valve 8 for opening/closing the drain opening 7 of the bottom face in the low tank 3, is arranged. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a low tank, and more particularly to a low tank having a structure tightly connected to a toilet bowl with a hot water washing device.

[0002]

2. Description of the Related Art Conventionally, when a hot water washing device is attached to a toilet bowl, a hot water washing device has been attached to the front side of an existing row tank installed at the rear of the toilet bowl so as to be adjacent to the row tank. FIG. 13 shows a conventional general low tank 3
The internal structure of is shown. In the figure, 5a is a ball tap constituting the water supply unit 5, 6 is a discharge port, 7 is a drain port, 8 is a drain valve, 20 is a cleaning lever, and W is stored water.

However, if a space for installing the hot water washing device is provided in front of the low tank, the size of the toilet bowl in the front-rear direction becomes long, so that the toilet bowl can be installed at a location where the distance between the toilet bowl and the wall of the toilet room is short. Even if it disappears or can be installed, the distance between the toilet bowl and the wall will be narrowed, especially,
It becomes difficult for people with disabilities and the elderly to use.

[0004] In particular, it is often heard in the market in recent years that there is a demand for a care space in a toilet room, assuming that care is needed in the future, or because care is actually needed, In addition, the housing performance labeling system based on the Housing Quality Assurance Promotion Act also classifies the housing space according to the size of the assistance space. Therefore, each manufacturer is developing a product in which the size of the toilet bowl is reduced so that a larger assistance space can be provided in the limited toilet room space.

However, if the size of the toilet bowl is simply reduced, the size of the toilet seat may be reduced to make it uncomfortable to sit in, or the low tank may hit the back against the user's back, causing discomfort. Therefore, it is the current situation that the size of the low tank is thinned without changing the size of the toilet seat and the pitch between the low tank and the toilet seat.

However, for example, in a shower tray having a low tank, a hot water washing function, and a toilet bowl integrated type, most manufacturers use a double tank system in addition to making the low tank thin in order to achieve compactness.
Central functions such as storage function, drainage function, and hot water cleaning function are integrated inside the low tank housing. Therefore, it is necessary to devise a way to fit each component, but in most cases, the shape of the low tank is deformed and other components are arranged in the gap to increase the integration rate.

[0007]

Further, it is obvious that the deformation of the raw tank has a great influence on the drainage performance of the tank. Especially, if the shape of the tank around the drain valve is narrowed or the direction of opening the drain valve is close to the low tank wall, the drain valve may be prematurely tightened or unstable opening operation may be performed experimentally. Has also been confirmed. In other words, if the opening operation of the drain valve is hindered, the flow rate of drainage from the low tank to the inside of the toilet bowl becomes small, which causes a problem that the cleaning effect decreases.

In order to make the low tank compact, it is conceivable that the water supply portion (ball tap) to the low tank and the drain valve 8 are arranged on the same vertical line. An example thereof is shown in FIG. 14, the same parts as those in FIG. 13 are designated by the same reference numerals. Arrows a and i'in FIG.
Indicates the flow of water, and arrow B indicates the opening / closing direction of the drain valve 8. In this case, depending on the conditions, it has been confirmed that the drain valve 8 opened by the water supply pressure is forcibly closed.

In order to achieve further compactness,
It is essential to operate the drainage valve 8 of the low tank 3 stably. Some manufacturers have newly developed a special operating mechanism for the drain valve 8,
There is a problem in terms of cost.

The present invention was invented in view of the problems of the above-mentioned conventional example, and the object thereof is to follow the present operating mechanism of the drain valve as it is, in the present invention.
It is to provide a structure of a low tank that can stabilize the opening operation of the drain valve in the low tank while sharing the components, and yet another object is to provide:
An object of the present invention is to provide a structure of a low tank that can minimize water splash inside the low tank when a horizontal baffle is installed.

[0011]

In order to solve the above problems, according to the present invention, in the structure of a low tank installed in the rear part of the toilet 1 with the hot water cleaning device 2, the low tank 3
A recess 4 is formed in the lower part of the front surface of the front of the tank 4 so that the hot water cleaning device 2 can be housed in the recess 4 and the discharge of the water supply unit 5 arranged in the upper portion of the raw tank 3 is performed. It is characterized in that a baffle plate 9 for partitioning a water passage between the outlet 6 and a drain valve 8 for opening / closing a bottom drain port 7 in the raw tank 3 in a horizontal direction A is arranged. Thus, by storing the hot water washing device 2 in the recess 4 formed in the lower portion of the front surface of the low tank 3, the overall length of the toilet 1 with the hot water washing device 2 can be shortened. On the other hand, by partitioning the water channel between the discharge port 6 of the water supply part 5 and the drain valve 8 by the baffle plate 9 in the horizontal direction A, the drain valve at the lower part of the low tank 3 is made by the recess 4 provided at the lower front part of the low tank 3. It becomes possible to prevent the stable opening of the drainage valve 8 from being hindered by the water supply pressure from the water supply part 5 by the baffle plate 9 in the horizontal direction A, and the opening operation of the drainage valve 8 can be prevented. The stability of can be increased.

Further, it is preferable that a baffle plate 10 in the vertical direction B is provided below the baffle plate 9 in the horizontal direction A. In this case, the water flow whose direction is changed by the baffle plate 9 in the horizontal direction A is provided. It can be further prevented by the baffle plate 10 in the vertical direction B from hitting the rear surface 8a side of the drain valve 8.

A water passage gap 11 for sending water toward the open surface 8b of the drain valve 8 is provided between the baffle plate 9 in the horizontal direction A and the low tank wall 3a. Preferably, in this case, when the stored water W in the low tank 3 is drained, water is also jetted from the water passage gap 11 toward the drain port 7, whereby the valve open state is maintained during drainage. A force that assists in the direction of applying is applied to the drain valve 8.

Further, it is preferable that a guide water passage 12 for forcibly sending water toward the open surface 8b of the drain valve 8 is provided when the drain valve 8 is opened. In this case, the drain valve is provided. When the valve 8 is opened, the water that has passed through the guide channel 12 is jetted toward the open surface 8b of the drain valve 8, so that the open state can be maintained.

Further, it is preferable that the water supply contact portion 50 on which the water is supplied from the horizontal baffle plate 9 is formed in a substantially hemispherical shape which is convex upward.
In this case, the water supply contact portion 5 has a shape having no horizontal portion.
Since 0 has a hemispherical cross-sectional shape that is convex upward, water splashing does not easily occur upward.

Further, a cut groove 51 is provided around the water supply contact portion 50 on which the water supply of the horizontal baffle plate 9 hits, so that the water supply contact portion 50 can be elastically deformed downward. Preferably, in this case, since the water supply contact portion 50 of the baffle plate 9 is provided with the cut groove 51 so as to have the characteristic of the leaf spring, the leaf spring-like water supply contact portion 50 is elastically deformed downward by the impact of the water supply. As a result, the impact can be alleviated, and the downward deformation causes no horizontal plane, so that upward water splashing is less likely to occur.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the embodiments shown in the accompanying drawings.

As shown in FIG. 2, a warm water washing device 2 and a low tank 3 are mounted on the rear portion of the toilet bowl 1 of this embodiment. The warm water cleaning device 2 includes a water supply unit including a reserve tank and a pump, a warm water tank 13, and a cleaning nozzle 1.
5. Further, various parts (not shown) such as a deodorizing device, a drying device, a circuit board, etc. are stored and arranged, and the water supplied from the tap water or the like is warmed in the warm water tank 13, and the warm water is washed by the cleaning nozzle 15 It is more sprayed and washed.
The washing nozzle 15 is for washing the human buttocks with warm water or for bidet washing, and is arranged toward the inside of the toilet 1 at a position where it does not interfere with the opening and closing of the toilet lid.

The lower part of the front surface of the raw tank 3 is shown in FIGS.
As shown in FIG. 3, a recess 4 that is recessed toward the raw tank 3 is formed. The hot water washing device 2 is housed in the recess 4, and the hot water washing device 2 prevents the length of the toilet bowl 1 from increasing. The shape of the recess 4 is not limited to that shown in the figure, and various shapes may be used depending on the shape and size of the hot water cleaning device 2. A drain port 7 provided on the bottom of the low tank 3
The position of the drain valve 8 is the same as the conventional one.

As shown in FIG. 2, a ball tap 5a connected to the water supply pipe 16 is provided in the upper portion of the raw tank 3, and the discharge port 6 of the ball tap 5a is directed downward. A drainage port 7 shown in FIG. 1 is provided on the bottom surface of the raw tank 3 and can be opened and closed by a drainage valve 8. In this example, the discharge port 6 and the drainage valve 8 are arranged on a substantially vertical line, and the positions of the drainage valve 8 and the drainage port 7 are provided at the same positions as in the conventional case. In addition, 17 in FIG. 1 is an overflow pipe connected to the drainage port 7.

The shaft portion 8a of the drain valve 8 is pivotally attached to the drain port 7 side, the drain valve 8 is rotatable in the vertical direction, and the open surface 8b contacts the valve seat of the drain port 7 in the closed position. Drainage outlet 7
Is closed. In addition, by operating the cleaning lever 20 provided outside the raw tank 3, the drain valve 8 is connected through the chain 21.
When the is pulled up, the open surface 8b separates from the valve seat to open the drainage port 7, and the water stored in the raw tank 3 flows out from the drainage port 7 to the drainage channel (not shown) of the toilet bowl 1 and The inside of the toilet bowl is washed by spraying from a rim water passage (not shown) provided on the outer periphery of the upper part. At this time, the water level in the low tank 3 is lowered and the ball tap 5a
The float floats down and the built-in valve body is opened and closed, the water from the water supply pipe 16 is supplied from the discharge port 6 into the low tank 3, and the water supply is continued until the water level in the low tank 3 reaches a predetermined level. It has become so.

The warm water cleaning device 2 can be taken into the low tank 3 by installing the warm water cleaning device 2 in such a manner that the warm water cleaning device 2 is fitted in the recess 4 formed in the lower portion of the front surface of the low tank 3. It is possible to shorten the total length of the toilet 1 with the hot water cleaning device 2. Therefore, assuming a need for nursing care in the future, or because nursing care is actually needed, in order to secure an assistance space in the toilet room, a larger assistance space should be provided in the limited toilet room space. Can be provided. Moreover, the warm water cleaning device 2 can be arranged so as to have a sense of unity with the low tank 3, and the appearance can be made cohesive and neat.

By the way, the hot water cleaning device 2 is installed in the low tank 3.
When the recess 4 for accommodating the water is provided, the tank shape around the drain valve 8 in the lower part of the low tank 3 is narrowed, and therefore the drain valve 8 is arranged below the discharge port 6 of the ball tap 5a, There arises a problem that the drain valve 8 opened by the water supply pressure from the discharge port 6 is forcibly closed.
Therefore, in the present invention, as a measure for stably opening the drainage valve 8, (1) a factor that causes an unstable operation is removed, and (2) an assisting force is added to maintain the open state of the drainage valve 8. I am trying. An embodiment of the present invention based on this measure will be described below.

First, a method for eliminating the influence of water supply pressure, which is considered as a factor of unstable operation, will be presented. As shown in FIG. 1, a baffle plate 9 is provided in the horizontal direction A above the drain valve 8 to prevent the forced closing due to the water supply pressure so that the drain valve 8 is not directly supplied with water to the raw tank 3. The baffle plate 9 in the horizontal direction A is the discharge port 6 of the ball tap 5a.
It works to prevent the opening operation of the drainage valve 8 from being hindered by the water pressure from. That is, in addition to the structure in which the total length of the toilet 1 with the hot water washing device 2 is shortened by providing the recess 4 for housing the hot water washing device 2 in the low tank 3 as described above, the horizontal direction A inside the low tank 3 is Baffle 9
And the water passage between the discharge port 6 of the ball tap 5a and the drain valve 8 is partitioned, the flow of water becomes the flow of arrow C → D → E in FIG. 1, and the opening operation of the drain valve 8 is the water supply pressure. Even if the opening direction of the drainage valve 8 approaches the low tank wall 3a, the drainage valve 8 will not be prematurely tightened or will not perform an unstable opening operation. Therefore, the stability of the opening operation of the drainage valve 8 can be enhanced, and the toilet 1 can be commercialized for the purpose of downsizing, and the drainage valve 8 can be shared with the conventional one, so that the number of parts can be reduced. Centralization can be achieved. In other words, while following the current operating mechanism of the drainage valve 8 as it is and sharing the parts, the low tank 3
It is possible to stabilize the opening operation of the drain valve 8 inside.

By the way, by providing the baffle plate 9 in the horizontal direction A, the flow of water inside the tank when the drain valve 8 is opened is shown in FIG.
However, the flow of arrow D may hit the back surface 8a side of the drainage valve 8, and in this case, a force for closing the drainage valve 8 is eventually applied. In order to weaken the force, as shown in FIG. 4, it is preferable to install the baffle plate 10 from the tip of the baffle plate 9 in the horizontal direction A to the vertical direction B so that the flow of the water stream D is directed downward. In this case, in order to prevent the flow of the water flow 2 → e from being obstructed by the baffle plate 10 in the vertical direction B, a water passage gap (not shown) is provided on both left and right sides of the baffle plate 10 in the vertical direction B. It is desirable to provide a water passage gap 30 further below. This makes it possible to secure the drainage flow rate while preventing the water flow from hitting the back surface 8a side of the drainage valve 8 by the baffle plate 10 in the vertical direction B. However, by eliminating the obstacle that prevents the opening operation of the drain valve 8, water can flow out at a large flow rate, and the cleaning effect on the toilet bowl 1 can be further enhanced. It should be noted that it is desirable that there is no gap at the joint between the baffle plate 10 in the vertical direction B and the baffle plate 9 in the horizontal direction A in order to reduce the influence on the opening of the drain valve 8.

Next, as a measure for increasing the assisting force of the drain valve 8 to the open state, the embodiment shown in FIGS. 5 to 7 will be described.
FIG. 5 shows the low tank wall 3 on the baffle plate 9 in the horizontal direction A.
It shows a case where a water passage gap 11 for sending water toward the open surface of the drain valve is provided between a and the baffle plate 9. This water passage gap 11 is provided at a position closest to the open surface 8b of the drain valve 8, and when the stored water in the raw tank 3 is drained, the flow of water is as indicated by arrows c → d → e in FIG. In addition to this, a flow of arrow →→ is added, and water can be ejected from the water passage gap 11 toward the drainage port 7. As a result, a force that assists in the direction of maintaining the valve open state during drainage is applied to the drainage valve 8 and stable operation is performed.

Similarly, as a measure for increasing the assisting force to the valve open state, FIGS. 6 and 7 forcefully send water toward the open surface 8b of the drain valve 8 when the drain valve 8 is opened. It shows a case where a guide water channel 12 is provided. In the example of FIG. 6, the inlet of the guide water channel 12 is flush with the baffle plate 9 in the horizontal direction A, and the flow of water is not only the flow of arrow C->D-> E but also the flow of arrow-> D. In addition, in the example of FIG. 7, the inlet of the guide water channel 12 is configured to project above the baffle plate 9 in the horizontal direction A, and the flow of water is in addition to the flow of arrow c → d → e It becomes a flow. In any case, when the drain valve 8 is opened, the water that has passed through the guide channel 12 is jetted toward the open surface 8b of the drain valve 8 as shown by the arrow G, so that the open state can be maintained and the drainage can be maintained. The stable operation of the valve 8 can be achieved. In addition, as a method of injecting water from the guide water passage 12, (1) a method of using a water flow when the stored water is drained, (2) a method of using water supply from the ball tap 5a, (3) water supply by a pump or the like And the like.

By the way, when the baffle plate 9 is provided in the horizontal direction in order to cut the influence of the water supply impact on the drain valve operation, the water supply hits the baffle plate 9 because the impact of the water supply is large in a high water pressure area. The water splash at the time may be large. If water splashes occur inside the low tank 3, water droplets may adhere to the inside of the lid of the low tank 3, causing mold to occur or causing water dripping when the lid is removed.

As a measure to prevent water splashing on the baffle plate 9, (1) devise the cross-sectional shape of the baffle plate 9 so that the bounce does not go upward after the water supply hits the baffle plate 1.
(2) The baffle plate 9 is processed so that the impact when the water supply hits the baffle plate 9 is mitigated.
The water splash prevention structure will be described below.

First, as the first water splash prevention structure, the shape of the baffle plate 9 capable of minimizing the water splash inside the raw tank 3 is shown in FIGS. In FIG. 9, reference numeral 55 is a Douglas valve vertically provided so as to communicate with the overflow pipe, 60 is a packing, 61 is a lower case, and 62 is a tightening nut. Also, low tank 3
One end of the baffle plate 9 is screwed by using the stepped portion 3b generated inside the low tank 3 by the recess 4 of the low tank 3, and the screw 64 is inserted into the baffle plate 9 in the shape of a dharma hole.
3 is provided. Other configurations are the same as those of the embodiment of FIGS. 1 and 2, and corresponding parts are designated by the same reference numerals and detailed description thereof will be omitted. Further, the baffle plate 9 can prevent the stable opening of the drain valve 8 from being hindered by the water supply pressure from the water supply part 5, and the baffle plate 10 (FIG. 4) in the vertical direction, the guide water channel 12 (FIG. 7), etc. The points that may be provided are the same as in the above-described embodiment, and only different points will be described. In this example, since the water splashing direction (arrow B and arrow B directions in FIG. 10B) is controlled, a portion of the baffle plate 9 to which water is supplied (hereinafter,
It is called the water supply contact part 50. ) The top shape is not flat. By the way, it has been confirmed by experiments that, even if a microscopic uneven shape such as sandpaper is used, if it is horizontal when viewed macroscopically, it has a water splashing property equivalent to that of a horizontal plane. Therefore, in this example, as a method of not forming a horizontal portion, the water supply contact portion 50 is provided with a protrusion 50a having a hemispherical cross-sectional shape that is convex upward. In the case of such a hemispherical projection 50a, a slight horizontal plane is generated only at its apex, but most of the other parts are not horizontal, so that the flow of water is indicated by arrows in FIG. 10 (b). '
Direction, and water splash does not easily occur in the upward direction. Moreover, since the cross-sectional shape of the protrusion 50a may be formed in a hemispherical shape, the number of parts does not increase and
Water splash prevention effect can be obtained with a simple structure. The hemispherical projection 50a is not limited to being integrally formed with the horizontal baffle plate 9, and, for example, a hemispherical member (projection 50a) that is a separate component from the baffle plate 9 may be attached to the baffle plate 9. It may be attached to the upper surface of the flat water supply contact portion 50.

Next, as a second water splash prevention structure, an example in which a cut groove 51 is formed around the water supply contact portion 50 so that the water supply contact portion 50 made of a flat plate can be elastically deformed downward is shown in FIG. It is shown in a) and (b). FIG. 11A shows the baffle plate 9
Insert two parallel cut grooves 51 along both sides of the water supply contact portion 50 from the edge of the water supply contact portion 50 between the cut grooves 51.
Shows a case where a plate spring-like plate portion 50b is formed,
FIG. 11B shows a cut groove 51 on three sides around the water supply contact portion 50.
And the water supply contact part 50 is bent downward along the remaining side to form a plate spring-like plate part 50b. Then, since the water supply contact portion 50 of the baffle plate 9 is provided with the cut groove 51 to form the plate portion 50b having the characteristic of the leaf spring, the plate portion 50b is lowered by the impact of the water supply (see FIG. 11).
It is elastically deformed in the direction indicated by the arrow (c) (b) to reduce the impact. Further, the downward deformation prevents water splashing upward. Moreover, the kerf 5 is formed in a part of the baffle plate 9.
Since only 1 is required, the number of parts is not increased, and the water splash prevention effect can be obtained with a simple structure.

In FIG. 12, a hemispherical projection 50a which is convex upward is formed on the water supply contact portion 50 and the projection 5 is formed.
A case is shown in which a kerf 51 is provided around 0a so that the groove can be bent downward. Therefore, by using the hemispherical water splash prevention structure and the leaf spring-like water splash prevention structure together, a compact low tank 3 having a structure tightly coupled with a flush toilet and having a horizontal direction inside thereof. In the case where the baffle 9 is stored, water splash at the time of water supply can be effectively prevented, and in addition to the reduction of impact noise, water droplets adhere to the inside of the lid of the low tank 3 to cause generation of mold or the lid. At the same time, the problem of water dripping when removing is removed. Also, FIG. 10 and FIG.
(Or, by combining two types of water splash prevention structures of FIG. 10 and FIG. 11B), a further water splash prevention effect can be obtained.

[0033]

As described above, according to the first aspect of the present invention, in the structure of the low tank installed in the rear part of the toilet bowl with the hot water washing device, the concave portion that is recessed toward the inside is formed in the lower front portion of the raw tank. And a hot water cleaning device can be stored in this recess, and between the discharge port of the water supply section located in the upper part of the raw tank and the drain valve for opening and closing the drain port on the bottom of the raw tank. Since the baffle for horizontally partitioning the water channel is arranged, the total length of the toilet bowl with the hot water washing device can be shortened by housing the hot water washing device in the recessed portion formed in the lower front portion of the low tank. Therefore, the toilet bowl can be installed even in an installation place where the distance between the toilet bowl and the wall is short, and the hot water washing device can be arranged with a sense of unity with the low tank, and the appearance is improved. Also, if the shape of the tank around the drain valve is narrowed by the recess, the stable opening of the drain valve is hindered by the water supply pressure from the water supply part, but this can be prevented by the horizontal baffle plate. There is no obstacle to the opening operation of the drain valve, the stability of the opening operation of the drain valve for draining from the low tank can be improved, and it is possible to commercialize a flush toilet aiming at compactness, and also the drain valve. Since it can be shared with conventional ones, the number of parts can be integrated. In other words, it is possible to stabilize the opening operation of the drain valve in the raw tank while sharing the parts by using the existing operation mechanism of the drain valve as it is.

According to the invention of claim 2, in addition to the effect of claim 1, since a vertical baffle plate is provided below the horizontal baffle plate, the direction can be changed by the horizontal baffle plate. It is possible to prevent the water flow from hitting the back side of the drain valve by the vertical baffle plate, and it is possible to further eliminate the obstacle that hinders the opening operation of the drain valve.

In addition to the effect of claim 1, the invention of claim 3 is for water passage for sending water toward the open surface of the drain valve between the horizontal baffle and the low tank wall. Since a gap is provided, when the stored water in the low tank is drained, water will also be jetted from this water passage gap toward the drain port, which will maintain the valve open state during drainage. The assisting force is applied to the drain valve, and stable operation is performed.

In addition to the effect of claim 1, the invention according to claim 4 is provided with a guide water passage for forcibly sending water toward the open surface of the drain valve during the opening operation of the drain valve. Therefore, when the drain valve is opened, the water that has passed through the guide channel is sprayed toward the open surface of the drain valve, so that the open state can be maintained and the opening operation of the drain valve can be further stabilized. it can.

In addition to the effect of any one of claims 1 to 4, the invention according to claim 5 is such that the cross-sectional shape of the water supply contact portion on the horizontal baffle against which water is supplied is directed upward. Since it is formed in a substantially hemispherical shape that is convex, that is, as a shape that does not have a horizontal portion, the water supply contact portion has a hemispherical cross-sectional shape that is convex upwards,
Water splash will not easily occur in the upward direction. Moreover, since the cross-sectional shape of the water supply contact portion may be formed in a hemispherical shape, the water splash prevention effect can be obtained with a simple structure without increasing the number of parts. As a result, in a compact low tank having a structure tightly connected to a toilet bowl, in which a horizontal baffle is stored, it is possible to effectively prevent water splashing during water supply and reduce impact noise. At the same time, the problem that water drops adhere to the inside of the lid of the low tank to cause mold or dripping when the lid is removed can be solved.

In addition to the effect of any one of claims 1 to 4, the invention according to claim 6 provides a cut groove in the periphery of the water supply contact portion on the horizontal baffle against which the water is supplied. Since the water supply contact portion can be elastically deformed downward, that is, since the water supply contact portion of the baffle plate is provided with a groove so as to have the characteristics of the leaf spring, the impact of the water supply causes a leaf spring-like shape. The water supply contact part elastically deforms downward,
The impact can be mitigated, and the downward deformation causes no horizontal plane, so that upward water splashing hardly occurs. Moreover, since it is only necessary to form a cut groove in a part of the baffle plate, it is possible to obtain a water splash preventing effect with a simple structure without increasing the number of parts. As a result, in a compact low tank having a structure tightly connected to a toilet bowl, in which a horizontal baffle is stored, it is possible to effectively prevent water splashing during water supply and reduce impact noise. At the same time, the problem that water drops adhere to the inside of the lid of the low tank to cause mold or dripping when the lid is removed can be solved.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an example of an embodiment of the present invention.

FIG. 2 is a front cross-sectional view illustrating a state in which a hot water cleaning device is housed in a recess of the same raw tank.

3A is a perspective view of the same raw tank, FIG. 3B is a bottom view, FIG. 3C is a front view, and FIG. 3D is a side view.

FIG. 4 is a side sectional view of another embodiment of the present invention.

FIG. 5 is a side sectional view of still another embodiment of the present invention.

FIG. 6 is a side sectional view of still another embodiment of the present invention.

FIG. 7 is a side sectional view of still another embodiment of the present invention.

FIG. 8 is a plan sectional view of still another embodiment of the present invention.

FIG. 9 is a side sectional view of the above.

FIG. 10A is a plan view of the baffle plate, and FIG. 10B is a sectional view taken along line NN of FIG.

FIG. 11A is a plan view of another example of the baffle plate,
(B) is a perspective view of still another example.

FIG. 12 is a plan view of still another embodiment of the present invention.

FIG. 13 is an explanatory diagram of an internal structure of a conventional low tank.

FIG. 14 is a reference diagram illustrating a case where a water supply pressure is applied to a drain valve when a recess is provided in a low tank.

[Explanation of symbols]

1 toilet bowl 2 Hot water cleaning device 3 low tanks 3a Low tank wall 4 recess 5 water supply department 6 outlets 7 drain 8 drain valve 8a back 8b open surface 9 Horizontal baffle 10 Vertical baffle 11 Water gap 12 guide waterways 50 Water supply contact part 51 kerf A horizontal direction B vertical direction

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kenjiro Arashi             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company F-term (reference) 2D038 JB05 JF00                 2D039 AA02 AE04 BA01 DB00 DB05                       EA03

Claims (6)

[Claims] 1. A structure of a low tank installed at the rear of a toilet bowl with a hot water cleaning device, wherein a recessed part is formed in the lower part of the front surface of the low tank, and the hot water cleaning device can be stored in this recess. In addition, a baffle plate that horizontally divides the water channel between the discharge port of the water supply section located in the upper part of the raw tank and the drain valve for opening and closing the drain port of the bottom surface of the raw tank should be installed. The structure of the low tank characterized by. 2. The low tank structure according to claim 1, wherein a vertical baffle plate is provided below the horizontal baffle plate. 3. A low tank according to claim 1, wherein a water passage gap for sending water toward the open surface of the drain valve is provided between the horizontal baffle plate and the low tank wall. Construction. 4. The structure of a low tank according to claim 1, further comprising a guide water passage for forcibly feeding water toward the opening surface of the drain valve when the drain valve is opened. 5. A cross-sectional shape of a water supply contact portion of the horizontal baffle against which water is supplied is formed in a substantially hemispherical shape that is convex upward.
The structure of the low tank according to any one of 1. 6. The horizontal water baffle plate is provided with a kerf around the water supply contact portion against which the water supply hits, so that the water supply contact portion can be elastically deformed downward. The structure of the low tank according to any one of 4 above.