JP2012001949A - Tank for storing rainwater and restraining outflow - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tank for storing rainwater and restraining outflow capable of maximally utilizing an installation space for storing rainwater and restraining outflow.SOLUTION: A tank T for storing rainwater and restraining outflow comprises: a reservoir tank 1 to store rainwater; an inflow section 2 to introduce the rainwater into the storage tank 1; and a temporary reservoir tank 3 to temporarily store the rainwater. The reservoir tank 1 is positioned above the temporary reservoir tank 3. Overflow sections 1b and 3b are provided with the reservoir tank 1 and the temporary reservoir tank 3 respectively. The overflow section 1b provided with the reservoir tank 1 is connected to the temporary reservoir tank 3. The temporary reservoir tank 3 has a discharge means 3c to gradually discharge the rainwater overflowing from the reservoir tank 1. The quantity of the rainwater discharged through the discharge means 3c is configured to be less than the quantity of the rainwater overflowing from the reservoir tank 1 into the temporary reservoir tank 3.

Description

  The present invention is mainly installed in residential land to store and effectively use rainwater from the fence of a house, and for rainwater storage and runoff control that can reduce the load on sewerage facilities and rivers. It is about the tank.

  In recent years, due to climate change due to global warming, Japan's climate is also approaching the subtropical region. Along with that, there is almost no rain during the dry season, and the water level of dams and lakes falls and water shortages occur, so water supply restrictions are implemented in various places, and it is difficult to provide sufficient amount of water for garden plants It has become. On the other hand, local heavy rains, in which extremely heavy rain falls in a short time, are also increasing, and if a large amount of rain falls at a time like this, in urbanized areas where there are few unpaved roads and vacant land Rainwater that falls on houses, parking lots, roads, etc. flows into rivers through the side ditches of roads without penetrating into the ground, causing so-called urban flooding beyond the capacity of rainwater drainage facilities and treatment plants There is a fear.

  Under such circumstances, rainwater that has fallen on the roof of a house is stored in a rainwater tank, and the stored rainwater is effectively used for car washing and watering plants.

  As such a device, for example, there has been proposed a rainwater storage device comprising a water storage tank provided with a spear connection portion for connecting a spear to the top surface, and a water receiving container detachably attached to the water storage tank ( Patent Document 1).

  However, since the rainwater storage device as in Patent Document 1 requires a space for inserting a water receiving container or the like below the faucet, the faucet cannot be provided at the lower portion of the water tank. If the faucet cannot be provided in the lower part of the water tank in this way, the rainwater stored below the faucet cannot be used. There is a problem that the water quality deteriorates at an early stage unless it is cleaned.

  In order to eliminate such a dead space, a rain water storage device in which a water storage tank is supported on a gantry has also been proposed (Patent Document 2). When the water storage tank is supported on the gantry in this way, even if the faucet is provided at the lower part of the water storage tank, a space for inserting a water receiving container or the like is created below the faucet, and the dead space of the water storage tank can be reduced.

  However, in the rainwater storage apparatus as described in Patent Document 2, the gantry simply supports the water tank, and it is difficult to say that the limited installation space is effectively utilized.

  As described above, rainwater storage devices such as Patent Document 1 and Patent Document 2 that effectively store rainwater in a water storage tank, when the water storage tank is full, drain the rainwater flowing into the water storage tank from the overflow pipe. Therefore, when the water tank is full, the rainwater that falls on the roof of the house is not stored in the rainwater storage device, but flows into the river through the side ditches of the road, which may cause urban flooding. Such a problem can be solved by always keeping the water tank in the state of empty water, but if it does so, it will be troubled at the time of watering a plant or washing a car, and so on.

  Under these circumstances, as an attempt to make effective use of rainwater and reduce urban flood damage as much as possible, rainwater that has fallen on the roof of a house is temporarily stored, and the stored rainwater is gradually discharged to the outside. Such devices have also been proposed. One of these is a residential rainwater storage and drainage control device that consists of a water storage tank that stores rainwater that has fallen on the roof of the house, and an outflow control tank that has an orifice to reduce the load on sewerage facilities and rivers. (Patent Document 3).

  In the residential rainwater storage and outflow suppression device of Patent Document 3, rainwater that overflows from the storage tank flows into the outflow suppression tank even when the storage tank becomes full. The rainwater that has flowed into the outflow suppression tank is not discharged at once by the small-diameter orifice provided in the outflow suppression tank, but is gradually discharged, so that the outflow of rainwater is suppressed and the next rainfall Occasionally, the outflow control tank is in an air-water state, and can be used again as a space for temporarily storing rainwater.

JP 2008-196285 A JP 2007-205006 A JP 2000-073417 A

  However, since the housing rainwater storage and outflow suppression device of Patent Document 3 must have a water storage tank and an outflow suppression tank on its structure, the device becomes large and a certain amount of installation space is required. In addition, there was a problem that the volume of the water storage tank could not be increased for a large apparatus. In addition, in order to eliminate the dead space below the faucet, when the faucet is provided in the lower part of the water storage tank, the height is adjusted separately by a stand or the like, and a space for inserting a water receiving container etc. is secured below the faucet. There was a need, and if this was the case, an extra installation space (height direction) was required, which could damage the aesthetics of the house. In addition, the apparatus of Patent Document 3 has a problem that when the water storage tank is full and the outflow suppression tank is in an empty state, the right and left weight balance is poor, and the outflow suppression tank side may be lifted.

  The present invention has been made in view of the above-mentioned problems, and the problem to be solved is to prevent rainwater storage and outflow suppression, which can make the most effective use of the installation space for rainwater storage and outflow suppression. To provide a tank.

  In order to achieve the above object, a tank for rainwater storage and outflow suppression according to the present invention includes a storage tank for storing rainwater, an inflow part for introducing rainwater into the storage tank, and a temporary storage for temporarily storing rainwater. A tank for rainwater storage and outflow suppression, comprising a storage section, wherein the storage tank is provided above the temporary storage section, and an overflow section is provided in each of the storage tank and the temporary storage section, The overflow portion provided in the storage tank communicates with the temporary storage portion, and the temporary storage portion is provided with a discharging means for gradually discharging the rainwater that has overflowed from the storage tank and flowed into the outside. The discharge amount of rainwater discharged by the discharge means is smaller than the inflow amount of rainwater that overflows from the storage tank and flows in.

  In the rainwater storage and outflow suppression tank of the present invention, it is preferable that one end of the inflow portion extends to the lower portion of the storage tank. In addition, the discharge means provided in the temporary storage section may be a rainwater storage tank that is an orifice provided in the lower portion of the temporary storage section, or a tank for suppressing outflow, or the discharge means provided in the temporary storage section may be a capillary phenomenon. A tank for rainwater storage and outflow suppression in which the drainage of rainwater discharged using the capillary phenomenon is located above the temporary storage part is preferable.

  The tank for rainwater storage and runoff control according to the present invention has a temporary storage part for temporarily storing rainwater separately from the storage tank for storing rainwater. Damage can be reduced as much as possible. In other words, even if the storage tank is full and rainwater overflows, the overflowed rainwater flows into the temporary storage section that is communicated by the overflow section, so even if the storage tank becomes full, it overflows from the storage tank. Rainwater will not be discharged to the outside at once, but will be gradually discharged to the outside by the discharging means provided in the temporary storage part, which has a smaller amount of discharge to the outside than the inflow amount of rainwater. Only the volume of the reservoir can surely contribute to the reduction of urban flood damage. Since the rainwater that has flowed into the temporary reservoir as described above is gradually discharged to the outside by the discharge means, the temporary reservoir is in an empty state until the next rain, and the reservoir is full. Even so, the outflow of rainwater can be suppressed again. As described above, the tank for rainwater storage and runoff control according to the present invention can effectively use rainwater and reduce the damage caused by urban flooding. Moreover, the storage tank is provided above the temporary storage section. Therefore, even when the storage tank is full and the temporary storage section is empty, there is no concern that only one side will be lifted unlike the conventional apparatus. In addition, since the temporary storage part also serves as a pedestal, even if a faucet is formed at the bottom of the storage tank, a space for inserting a water receiving container or the like is secured, and dead space generated below the faucet can be almost eliminated. The storage tank having the maximum capacity can be secured in the limited installation space, and the water quality does not deteriorate at an early stage without frequently cleaning the inside of the storage tank.

  Moreover, when one end of the inflow part is extended to the lower part of the storage tank, as in the case of a rainwater storage tank where one end of the inflow part extends to the lower part of the storage tank and the outflow suppression tank, sand mixed in the rainwater, etc. Since foreign matter flows into the storage tank from the bottom of the storage tank together with rainwater and settles as it is at the bottom of the storage tank, it is difficult for foreign objects to enter the rainwater that overflows from the top of the storage tank, and maintenance of the means for discharging the temporary storage section is facilitated. Almost unnecessary.

  The drainage means provided in the temporary storage section is an orifice provided in the lower part of the temporary storage section, and the rainwater storage tank and the tank for controlling the outflow prevent outflow of rainwater flowing into the temporary storage section from the storage tank. While sufficiently restrained, rainwater temporarily stored in the temporary storage section can be surely discharged to the outside.

  In addition, the discharge means provided in the temporary storage section uses capillary action, and the drainage of rainwater discharged using the capillary phenomenon is used to prevent rainwater storage and outflow control at the upper part of the temporary storage section. In the same manner as described above, the tank for this purpose can sufficiently suppress the outflow of rainwater flowing in from the storage tank, and it is possible to provide a rainwater discharge port at the upper part of the temporary storage section by utilizing capillary action. Even if foreign matter is mixed in the rainwater overflowing from the storage tank, there is no concern about clogging or the like, and it can be reliably discharged to the outside.

It is a disassembled perspective view of the tank for rainwater storage and outflow suppression which concerns on one Embodiment of this invention. It is sectional drawing of the tank. It is a schematic front view which shows the installation state of the tank. It is explanatory drawing which compares the tank and the apparatus which provided the outflow suppression tank side by side. It is sectional drawing of the tank for rainwater storage and outflow suppression which concerns on other embodiment of this invention. It is sectional drawing of the tank for rainwater storage and outflow suppression which concerns on other embodiment of this invention. It is a schematic front view which shows the installation state of the tank for rainwater storage and outflow suppression which concerns on other embodiment of this invention.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1 and FIG. 3, a tank T (hereinafter simply referred to as “tank T”) for storing and draining rainwater according to the present invention has a storage tank 1 for storing rainwater and rainwater in the storage tank 1. An inflow section 2 to be introduced and a temporary storage section 3 for temporarily storing rainwater, and the rainwater falling on the roof (not shown) of the house is effectively used for watering plants, washing cars, etc. It is installed in order to suppress the drainage to the rainwater drain pipe 10 at a stretch and reduce the load on sewerage facilities and rivers.

The storage tank 1 constituting the tank T is a casing having a capacity of 50 to 400 liters for storing rainwater. As shown in FIG. 1, the outer surface is decorated in a brick-like manner so as to match the exterior of the house. Is formed. As shown in FIG. 2, an inlet 1 a that connects an inflow portion 2 for introducing rainwater into the storage tank 1 is formed at the upper part of one side surface of the storage tank 1. In the upper part of the side surface, an overflow portion 1b is formed that serves as a discharge port when the storage tank 1 is full. The diameter of the overflow portion 1b is the same as or larger than the inflow port 1a, and the diameter is about 10 to 60 mm and the opening area is about 0.7 to 30 cm ² . The inflow port 1a has a cylindrical body protruding from the outside of the storage tank 1 and a cylindrical body protruding from the inner side in order to connect the inflow portion 2 to the inside.

  Further, as shown in FIGS. 1 and 3, a faucet 1 c for taking in rainwater stored inside the storage tank 1 is formed at the lower front portion of the storage tank 1. The tank T according to the present invention secures an insertion space for a water receiving container or the like even when the faucet 1c is provided at the lower front of the storage tank 1 by placing the storage tank 1 on a temporary storage section 3 to be described later. Thus, the dead space of the storage tank 1 can be reduced as much as possible. When the faucet 1c is twisted, rainwater is discharged. By connecting a hose to the faucet 1c, the rainwater stored in the storage tank 1 can be used for various purposes such as watering plants and washing cars. It can be effectively used for the purpose and can save water charges and sewerage charges.

  Furthermore, as shown in FIGS. 1 and 2, an opening 1d used for cleaning and maintenance is formed on the top surface of the storage tank 1. Since the opening 1d is formed for use during cleaning or maintenance, it is necessary to form at least a size that allows a hand to be inserted into the storage tank 1, and two hands should be formed. Two openings 1d are formed instead of one so that they can be used.

And the top | upper surface of the said storage tank 1 is covered with the cover body 7, as shown in FIG. 1, FIG. If the lid 7 covers the top surface of the storage tank 1 in which the opening 1d is formed, the inside of the storage tank 1 can be cleaned and inspected simply by removing the cover 7, so that maintainability is improved. .
A hinge may be provided so as to straddle the rear side of the top surface of the storage tank 1 and the rear side of the lid body 7 so that the lid body 7 can be tilted up and down.

  Next, as shown in FIG. 3, the inflow part 2 for introducing rainwater into the storage tank 1 collects rainwater flowing down the eaves 8 by a water collecting joint 9, and the collected rainwater is stored in the storage tank. As shown in FIG. 2, the drain pipe for introduction into 1 is divided into two at the inlet 1 a of the storage tank 1. Of the inflow portion 2 divided into two, one end of the inflow portion 2 disposed outside the storage tank 1 is connected to the inlet 1a of the storage tank 1, and the other end of It is connected to a water collecting joint 9 installed in the middle of the route. One end of the inflow portion 2 disposed inside the storage tank 1 is connected to the inflow port 1 a inside the storage tank 1, and the other end extends to the lower part of the storage tank 1. As described above, when one end of the inflow portion 2 is extended to the lower part of the storage tank 1, foreign matters such as sand mixed in the rainwater flow into the storage tank from the lower part of the storage tank together with the rainwater, and settle on the bottom surface of the storage tank 1 as it is. Therefore, it becomes difficult for foreign matter to be mixed into the rainwater overflowing from the upper part of the storage tank 1.

As shown in FIGS. 2 and 3, the storage tank 1 having the above configuration is placed on the temporary storage unit 3. The temporary storage unit 3 serves as a frame for the storage tank 1 and is a space for temporarily storing rainwater overflowed from the storage tank 1 in the interior thereof, thereby preventing outflow of rainwater and preventing urban flooding. This is to reduce the damage as much as possible. An inflow port 3a is formed at the upper side of the side surface of the temporary storage unit 3, and the overflow port 1a overflows from the storage tank 1 by connecting the inflow port 3a and the overflow part 1b of the storage tank 1 through a substantially U-shaped communication pipe 4. The rainwater that has been discharged flows into the temporary storage part 3. In addition, an overflow portion 3b having the same diameter as the inflow port 3a or larger than the inflow port 3a is formed at the upper part of the other side surface of the temporary storage portion 3, and when the temporary storage portion 3 is full of water, Rainwater can be discharged to the outside. A drainage hose 5 is connected to the overflow portion 3b, and rainwater overflowed from the temporary storage portion 3 flows from the drainage hose 5 to the drainage basin 12. Since the tank T of the present invention is usually installed outdoors, there is no problem even if rainwater is directly discharged from the overflow portion 3b. However, the overflow portion 3b is drained by the drainage hose 5 as in this embodiment. By connecting with the drainage basin 12, the overflowed rainwater does not wet the ground.
In addition, you may form the overflow part 3b larger than the inflow port 3a. Moreover, you may connect the end of the drainage hose 5 connected to the overflow part 3b to the gutter 8 again.

  Further, as shown in FIGS. 1 and 2, the temporary storage unit 3 is provided with a discharge means 3 c for gradually discharging rainwater that has overflowed from the storage tank 1 and flowed into the outside. Specifically, the discharge means 3c is a small-diameter orifice 3c having a diameter of about 1 to 20 mm provided at the lower side of the side surface of the temporary reservoir 3, and a drain pipe 6 is connected to the orifice 3c. Similarly to the overflow part 3b, the drained rainwater flows into the drainage basin 12. By providing the orifice 3c in the temporary reservoir 3, the outflow of rainwater is suppressed. In other words, the amount of rainwater discharged from the orifice 3c to the outside is very small due to its diameter, and the amount of rainwater flowing from the overflow portion 1b of the storage tank 1 through the communication pipe 4 into the temporary storage portion 3 is smaller than that. Therefore, the rainwater overflowing from the storage tank 1 is temporarily stored in the temporary storage unit 3. Thereby, even if the storage tank 1 becomes full, the rainwater overflowing from the storage tank 1 is not discharged to the outside at once, and the outflow of rainwater is suppressed. When the rain becomes weaker or the rain stops, the rainwater temporarily stored in the temporary storage unit 3 is gradually discharged to the outside from the orifice 3c, and the water level of the temporary storage unit 3 begins to drop. All of the rainwater stored in the storage part 3 is discharged to be in the state of empty water. Therefore, a space for temporarily storing rainwater again in the temporary storage unit 3 is created by the next rain, and the volume of the temporary storage unit 3 can surely contribute to the reduction of urban flood damage. it can.

  In addition, the temporary storage unit 3 also serves as a frame for the storage tank 1. By placing the storage tank 1 on the temporary storage unit 3, the storage tank 1 is full and the temporary storage unit 3. Even when the water is empty, there is no need to worry about only one side floating, and even if the faucet 1c is formed in the lower part of the storage tank 1, a space for inserting a water receiving container is secured and the faucet 1c is located below the faucet 1c. Since the generated dead space can be almost eliminated, the capacity of rainwater that can be effectively used in the storage tank 1 can be increased if the installation space is the same. In order to verify this, measurements as shown in FIG. 4 were performed. This measurement is performed when the storage tank 1 is placed on the temporary storage section 3 as in the tank T of the present invention (a), and the outflow suppression tank 102 is placed beside the water storage tank 101 as in the conventional apparatus 100. In the case of (b), the storage tank 1 and the storage tank 101 are compared in the capacity of rainwater that can be effectively used. The area and height of the bottom of the tank T and the conventional apparatus 100 are the same (the installation space is the same). The same), and the volume of the temporary reservoir 3 and the outflow suppression tank 102 and the mounting height position of the faucet 1c are measured under the same conditions. At this time, the faucet 1c needs to be installed at a height at which the water receiving container can be inserted from the ground in order to secure an insertion space for the water receiving container or the like below the faucet 1c. The dead space D is born below and rainwater stored in that part cannot be effectively used. This is the same because the volume of the water storage tank 101 is reduced by the amount of the frame even if the dead space D is replaced with the frame. As a result of measurement under such conditions, if the installation space is the same, the capacity of rainwater that can be effectively utilized is the tank of the present invention in which the storage tank 1 is placed on the temporary storage section 3 rather than the conventional apparatus 100. It was found that T was about 35% larger. Thus, the tank T of the present invention can secure the maximum capacity of the storage tank 1 in the limited installation space by placing the storage tank 1 on the temporary storage section 3, and dead space. Since D hardly occurs, the water quality does not deteriorate at an early stage without frequently cleaning the inside of the storage tank 1.

As shown in FIG. 3, the tank T configured as described above is installed in the vicinity of the basket 8 disposed in a house (not shown). A water collecting joint 9 is installed in the middle of the path of the rod 8, and rainwater collected by the water collecting joint 9 flows into the inflow portion 2 and is introduced into the storage tank 1. ing. The water collecting joint 9 installed in the middle of the path of the eaves 8 may be any type of joint as long as it can collect rainwater flowing down the eaves 8 efficiently. The water collecting joint 9 of the embodiment uses an annular groove portion formed on its inner peripheral surface for collecting rainwater that has flowed down.
The rainwater that has not been collected by the water collecting joint 9 flows into the rainwater drain pipe 10 via the cheese joint 11 connected to the lower end of the gutter 8.

In the residential land where the tank T as described above is installed, rainwater that falls on the roof (not shown) of the house flows down the fence 8 and is collected by the water collecting joint 9 installed in the middle of the route. Then, it is introduced from the inflow part 2 into the storage tank 1. In this way, the storage tank 1 is filled with water, and the rainwater overflowed from the overflow part 1b flows into the temporary storage part 3 through the communication pipe 4 and is temporarily stored. When the rain becomes weak or the rain stops and the rainwater overflowing from the storage tank 1 does not flow into the temporary storage section 3, the rainwater stored in the temporary storage section 3 is provided at the lower side of the side surface. It is gradually discharged from the orifice 3c to the outside, and eventually all the rainwater stored in the temporary storage section 3 is discharged to become an empty water state. The rainwater is again returned to the temporary storage section 3 until the next rainfall. A space to temporarily store is born. Thus, the tank T of the present invention can contribute to the reduction of urban flood damage with certainty by the volume of the temporary reservoir 3.
Note that the amount of rainwater overflowing from the storage tank 1 is much larger than the discharge amount gradually discharged from the orifice 3c, so that there may be no storage space in the temporary storage unit 3, but in that case Since rainwater is discharged to the outside from the overflow part 3b of the temporary storage part 3, no problem occurs.
Further, in the residential land where the tank T as described above is installed, the drainage to which the drainage hose 5 and drainage pipe 6 are connected in order to further increase the rainwater outflow suppression effect and reduce the damage of urban floods. It is also preferable that the ridge 12 is a rainwater infiltration basin having holes drilled in the side surface and the bottom surface. Furthermore, if the rainwater drainage pipe 10 is also a perforated permeation pipe having a perforated hole on the peripheral surface, it is possible to reduce the damage of urban flooding in the entire residential land including the tank T.

  FIG. 5 is a cross-sectional view of a tank for rainwater storage and runoff control according to another embodiment of the present invention.

The tank T1 (hereinafter simply referred to as the tank T1) for rainwater storage and outflow suppression according to the embodiment shown in FIG. 5 is the storage tank with the overflow portion 1b of the tank T according to the embodiment shown in FIGS. In contrast to the discharge port provided in the upper portion of the side surface of 1, an overflow portion 10 b is provided in the communication pipe 40 itself for communicating the storage tank 1 and the temporary storage portion 3. This communication pipe 40 is a pipe made of vinyl chloride resin, and an overflow part 10b which is a circular opening is provided at the upper part of the peripheral surface. In order to arrange the communication pipe 40 inside the storage tank 1, insertion holes 1 e and 1 f are formed in the top and bottom surfaces of the storage tank 1, respectively, and also inserted into the upper surface of the temporary storage unit 3. A hole 3d is formed, and the communication pipe 40 is disposed so as to rise upward from the insertion holes 1f and 3d, and is held in the insertion hole 1e on the top surface.
Other configurations of the tank T1 for rainwater storage and outflow suppression shown in FIG. 5 are the same as the tank T for rainwater storage and outflow suppression of the embodiment shown in FIGS. The same reference numerals are given to the members, and the description is omitted.

  In the tank T1 having the above-described configuration, rainwater introduced into the storage tank 1 from the inflow portion 2 is stored in the same manner as the tank T of the embodiment shown in FIGS. And when the water level of the storage tank 1 reaches the overflow part 10b, rainwater flows into the communication pipe 40 from the overflow part 10b and flows down to the temporary storage part 3. In such a tank T1, since the communication pipe 40 is not exposed, the appearance of the tank T1 is clean. Moreover, since the upper end surface of the communication pipe 40 is opened, the maintenance of the communication pipe 40 and the overflow part 10b is possible from the upper part.

  FIG. 6 is a cross-sectional view of a tank for rainwater storage and runoff suppression according to still another embodiment of the present invention.

The rainwater storage and outflow suppression tank T2 (hereinafter simply referred to as the tank T2) according to the embodiment shown in FIG. 6 uses rainwater temporarily stored in the temporary storage section 3 as a temporary storage section 3 using a capillary phenomenon. It is made to discharge | emit gradually outside from the discharge port 30b provided in the side part upper part. In order to utilize this capillary phenomenon, in this embodiment, a fiber bundle 30c such as a woven fabric is used. The fiber bundle 30c is arranged so that one end thereof is positioned in the vicinity of the bottom surface of the temporary storage section 3, and is bent 180 ° with the discharge port 30b as a boundary, and the other end is positioned in the vicinity of the ground. Yes. When the tank T2 using the capillary phenomenon is installed in the residential land, the rainwater that overflows from the storage tank 1 and is temporarily stored in the temporary storage unit 3 gradually rises up the fiber bundle 30c, and temporarily It is discharged to the outside through a discharge port 30b formed at the upper side of the side surface of the reservoir 3. Moreover, in this embodiment, the rainwater discharge port 30b discharged using the capillary phenomenon also serves as the overflow portion 30b. Therefore, when rainwater further flows into the temporary storage unit 3 in a state where the temporary storage unit 3 is full, it is discharged from the discharge port 30b to the outside. And in order to conceal that the fiber bundle 30c is exposed to the outside, the discharge port 30b extends to the ground.
In addition to the above-described fiber bundle 30c such as a woven fabric, rainwater temporarily stored in the temporary storage unit 3 may be discharged to the outside using a bundle of thin tubes.
The other configuration of the tank T2 for rainwater storage and outflow suppression shown in FIG. 6 is the same as that of the tank T for rainwater storage and outflow suppression of the embodiment shown in FIGS. The same reference numerals are given to the members, and the description is omitted.

  Similarly to the tanks T and T1 of the embodiment shown in FIGS. 1 to 5 described above, the tank T2 of this embodiment can sufficiently suppress the outflow of rainwater flowing in from the storage tank 1 and also uses capillary action. This makes it possible to provide the rainwater discharge port 30b at the upper part of the side surface of the temporary storage unit 3, and even if foreign matter is mixed in the rainwater overflowing from the storage tank 1, there is no need to worry about clogging. It is possible to discharge to the outside of the temporary storage unit 3.

  FIG. 7 is a schematic front view showing an installed state of a tank for storing rainwater and suppressing outflow according to still another embodiment of the present invention.

  The tank T3 (hereinafter simply referred to as the tank T3) for rainwater storage and outflow control of the embodiment shown in FIG. 7 has an inflow portion 20 for introducing rainwater into the storage tank 1, and the storage tank 1 is full. It also plays a role as an overflow part at the time. That is, as shown by an arrow in FIG. 7, rainwater flowing down the eaves 8 is collected by the water collecting joint 9 and introduced into the storage tank 1 from the inflow portion 20. When the storage tank 1 becomes full, the rainwater that has become full overflows from the storage tank 1 and flows again into the trough 8 from the inflow portion 20. Accordingly, the inflow part 2 of the tanks T to T2 of the embodiment shown in FIGS. 1 to 6 described above is divided into two with the inlet 1a of the storage tank 1 as a boundary, and is disposed inside the storage tank 1. One end of the inflow part 2 extends to the lower part of the storage tank 1, but if it extends to the lower part of the storage tank 1, it will not overflow, so the inflow part 20 of this embodiment is only on the outside of the storage tank 1. One end of the storage tank 1 is connected to the inlet 1 a of the storage tank 1, and the other end is connected to the water collecting joint 9 installed in the middle of the path of the basket 8.

Moreover, the overflow part 3b provided in the temporary storage part 3 of this tank T3 is connected with the water collection joint 9 by the drainage hose 5, as shown in FIG. The rainwater that has flowed down is collected by the water collecting joint 9 and flows into the temporary reservoir 3. As described above, the tank T3 of the present embodiment has the ridge 8 disposed between the water collecting joint 9 installed on the upper side and the water collecting joint 9 installed on the lower side, as shown in FIGS. 4 serves as the communication pipe 4 of the tank T of the embodiment shown in FIG. On the other hand, the temporary storage part 3 is filled with water, and the rainwater overflowing from the overflow part 3 b of the temporary storage part 3 flows again into the trough 8 through the drainage hose 5. Thus, in the tank T3 of the present embodiment, the overflow portion 3b provided in the temporary storage portion 3 serves as both a rainwater discharge port when the water is full and a rainwater inflow port from the storage tank 1. It is a thing.
The other configuration of the tank T3 for rainwater storage and outflow suppression shown in FIG. 7 is the same as the tank T for rainwater storage and outflow suppression of the embodiment shown in FIGS. The same reference numerals are given to the members, and the description is omitted.

  The tank T3 configured as described above is particularly preferably used when the tank T3 can be installed in the immediate vicinity of the dredger 8, and members such as the communication pipe 4 and the drainage dredger 12 are not necessary, which can greatly reduce the cost. it can.

T, T1, T2, T3 Tank for rainwater storage and outflow suppression 1 Storage tank 1a Inflow port 1b Overflow portion 1c Faucet 1d Opening portion 1e Insertion hole 1f Insertion hole 2 Inflow portion 20 Inflow portion (overflow portion)
3 Temporary storage part 3a Inlet 3b Overflow part 30b Outlet (overflow part)
3c Orifice 30c Fiber bundle 3d Insertion hole 4, 40 Communication pipe 5 Drain hose 6 Drain pipe 7 Lid body 8 ９ 9 Water collecting joint 10 Rainwater drain pipe 11 Cheese joint 12 Drainage trough 100 Conventional apparatus 101 Water storage tank 102 Outflow control tank D dead space

Claims (4)

A tank for rainwater storage and outflow suppression, comprising a storage tank for storing rainwater, an inflow part for introducing rainwater into the storage tank, and a temporary storage part for temporarily storing rainwater,
The storage tank is located above the temporary storage section,
An overflow part is provided in each of the storage tank and the temporary storage part, and an overflow part provided in the storage tank communicates with the temporary storage part,
The temporary storage section is provided with a discharge means for gradually discharging rainwater that has overflowed from the storage tank to the outside, and the amount of rainwater discharged by the discharge means overflows from the storage tank. A tank for rainwater storage and runoff control, characterized in that it is less than the inflow of rainwater.   The tank for rainwater storage and outflow suppression according to claim 1, wherein one end of the inflow portion extends to a lower portion of the storage tank.   The tank for rainwater storage and outflow suppression according to claim 1 or 2, wherein the discharging means provided in the temporary storage section is an orifice provided at a lower portion of the temporary storage section.   2. The discharge means provided in the temporary storage section utilizes a capillary phenomenon, and a rainwater discharge port discharged using the capillary phenomenon is located above the temporary storage section. Or the tank for rainwater storage and runoff control of Claim 2.

Images