JP2012172423A - Floating body connection type flap gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent door body blocks on a front end side from floating due to minor flooding and eliminate hindrance to the passage of pedestrians and vehicles.SOLUTION: A floating body connection type flap gate 11 of a door body is constructed such that a plurality of door body blocks divided in the height direction are connected together to be rotatable in a height-direction plane toward a direction of flowing water, in order to block an opening or a gateway to which the water flows, and that only the door body blocks on a front side of the hight direction are rotatable by a predetermined angle also in a direction opposite to the inflow water direction. A front end floating body block 16 having a buoyancy adjustment function provided inside with a buoyancy chamber 16a and a water intake chamber 16b is installed in a range of the door body block 12a on the front side where pedestrians and vehicles can pass through. As to the water intake chamber 16b, a lid 16c with an opening formed for taking rain water or the inflow water is provided in a top face in the case of the front end floating body block 16 having a buoyancy adjustment function in a fallen state, and a drainage device 17 is provided in the front end part. Consequently, the passage of pedestrians and vehicles is not hindered in the case of minor flooding.

Description

  The present invention is installed at the opening of a seawall, the entrance of a building / underground space, etc., and when the water is increased, the door body is erected so that the increased water does not flow into the backland of the seawall, the building / underground space. The present invention relates to a floating body connected flap gate that blocks the opening and the entrance.

  Floating flap gates may be installed at the opening of the tide bank or at the entrance of the building / underground space so that the increased water does not flow into the backland of the tide bank or the building / underground space when the water increases ( For example, Patent Documents 1 and 2).

  This type of floating-type flap gate has a single large floating body in the door body, and uses the water pressure flowing from the opening and the entrance and the buoyancy of the door body itself to erect the door body, The doorway is watertight.

  However, in the conventional floating flap gate, the door body is integrally formed in the height direction, and the door body stands up at a stretch after the water level reaches a certain height. Met. On the contrary, at the time of lodging, even if the water level drops to the water level where the door body stood up, the door body does not start lodging, and after the water level drops more than that, the door body falls down at a stretch. And the storage part of the door body is easily damaged. In addition, it is dangerous if there are people around.

  Therefore, in order to solve the above-mentioned problem, the applicant divides the door body into, for example, two parts in the height direction, and connects the two divided door body blocks so as to be rotatable in the direction of the flowing water. A flap gate was proposed.

  In this floating body connection type flap gate, the door block divided into two in the height direction rises sequentially from the base end side in accordance with the water level flowing in from the opening or the entrance.

  In such a floating body connection type flap gate, when only the door block on the tip side in the height direction can be rotated by a predetermined angle in the direction opposite to the water flowing in from the opening or the entrance / exit, It will surface before the inflow.

  Therefore, the water flowing in from the opening or the entrance / exit can be effectively led to the lower side of the door block on the base end side in the lying state, and the floating of the door block at the initial inflow starts to flow in from the opening or the entrance / exit. The operation becomes faster, and the flow of water from the opening or the entrance / exit can be prevented.

  However, the opening and the entrance and the like where the floating flap gate is installed have a large amount of traffic for people and vehicles. When the floating-joint flap gate having the above-described configuration is installed in such a place, even if the element other than the tsunami, for example, a slight flood (about 20 cm or less) due to heavy rain or the like, as shown in FIG. The door block 1a rises. In this case, the door body block 1a at the tip that has surfaced hinders the passage of people and vehicles. FIG. 9A is a diagram showing a normal storage state, and 1b shows a door block on the base end side.

  In order to solve the above problems, if the weight of the door block at the tip is increased so that the door block at the tip does not rise due to slight water immersion, the initial standing motion of the door will be delayed, causing a tsunami or flood. Problems such as water stoppage performance in the early stage of heavy flooding.

JP 2001-214425 A JP 2003-253912 A

  The problem to be solved by the present invention is that when a floating body-connected flap gate is installed at the opening of a seawall or at the entrance / exit of a building / underground space, the door block on the front end side can be used even with light flooding of about 20 cm or less. Will rise and hinder the passage of people and vehicles.

  In the present invention, when a floating body-connected flap gate is installed at the opening of a seawall or at the entrance / exit of a building / underground space, the door block on the tip side does not float up in light flooding of about 20 cm or less. It was made for the purpose of preventing troubles in the passage of vehicles.

Floating body connected flap gate of the present invention,
A plurality of door blocks, which are installed at the opening or the entrance and are divided in the height direction so as to block the opening or the entrance through which the water flows, are arranged in a plane in the height direction in the direction of the flowing water. Floating body connected flap gates configured such that only the door block on the front end side in the height direction of the door body rotatably connected is rotatable by a predetermined angle in the direction opposite to the inflowing water,
In the range where the person and vehicle of the door block on the tip side can pass, a tip floating body block with a buoyancy adjustment function provided with a buoyancy chamber and a water intake tank inside is installed,
The water intake tank is provided with a lid formed with an opening for taking in rainwater or the inflowed water on the upper surface when the tip floating body block with a buoyancy adjustment function is in a lying state, and a drainage device is provided at the tip. The main feature is that

  In the present invention described above, since the tip floating body block with a buoyancy adjustment function in which a buoyancy chamber and a water intake tank are provided is installed in a range in which a person and a vehicle of the door block on the tip side can pass, an opening is provided for light flooding. The floating amount of the tip floating body block with a buoyancy adjustment function is reduced by being taken into the water intake tank from the formed lid.

  In the present invention, in the range where the front-end floating body block with a buoyancy adjustment function on the front-end side door block is installed, mild inundation such as heavy rain is taken into the intake tank and the floating amount is reduced, so that people and vehicles can pass There are no obstacles.

  On the other hand, in the event of a severe inundation such as a tsunami or flood, the water in the water intake tank is drained from the lid opening as the tip floating body block with buoyancy adjustment function rises. Operation delay can be prevented, and reliability as disaster prevention equipment can be secured.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the falling state of the floating body connection type flap gate of this invention, (a) is a top view, (b) is the figure seen from the AA direction of (a) figure. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram of a tip floating body block with a buoyancy adjustment function installed in a range in which a person and a vehicle of a tip side door body block can pass through a floating body-coupled flap gate of the present invention, and (a) is viewed from the upper surface in a lying state. (B) is an AA cross-sectional view of (a), (c) to (e) are BB cross-sectional views of (a), (c) a single hinge type, and (d) a check valve type. (E) is the figure which showed the single hinge type | mold with a torsion spring. (A) is an enlarged cross-sectional view of a single hinge type drainage device, (b) to (c) are diagrams showing an operation image, and (b) is a case where the external water surface is higher than the water surface in the water intake tank. ) Is a diagram when the water surface of the outside is lower than the water surface in the intake tank, and FIG. (A) is an enlarged cross-sectional view of a check valve type drainage device, (b) and (c) are diagrams showing an image of operation, (b) in case of lodging, (c) is operated by tsunami and flood It is a figure of time. (A) is an enlarged cross-sectional view of a single-hinged drainage device with a torsion spring, (b) and (c) are diagrams showing an operation image, (b) is when lying down, (c) is a tsunami or flood It is a figure at the time of the action | operation by. It is the figure which showed the state at the time of the fall of the floating body connection type | mold flap gate of this invention at the time of slight water immersion. (A)-(c) is the figure which showed the other example of arrangement | positioning of the buoyancy chamber of a tip floating body block with a buoyancy adjustment function, and a water intake tank. It is the figure which showed the other structural example of the front-end | tip floating body block with a buoyancy adjustment function, (a) is a figure at the time of lying down, (b) is a figure at the time of the action | operation by a tsunami or flood. It is the figure which showed the fall state of the conventional floating body connection type | mold flap gate, (a) is a normal time, (b) is a figure at the time of slight water immersion.

  The purpose of the present invention is to prevent the front door block from rising due to mild water so that it does not hinder the passage of people and vehicles. This is achieved by installing a floating body block with a buoyancy adjustment function.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIGS.
FIG. 1 is a diagram showing a schematic configuration of a lying state of a floating body connected flap gate of the present invention.

  In FIG. 1, reference numeral 11 denotes a floating body-connected flap gate of the present invention installed on a road surface rs of an opening o of a seawall cl constructed at a position lower than a road surface, for example. This floating body connection type flap gate 11 uses the water pressure of the inflowing water w and the buoyancy of the door body 12 when the water w tries to flow into the hinterland (or road surface) of the seawall cl from the ocean (or river). Then, the door body 12 is erected with the base end side as a fulcrum to block the opening o in a watertight state.

  The door body 12 constituting the floating body connection type flap gate 11 is divided into two door body blocks having a hollow structure made of steel, for example, in the height direction. Hereinafter, these two door body blocks are referred to as a front-end-side door body block 12a and a proximal-end-side door body block 12b from above in the standing state.

  And between these door block 12a and 12b and between the door block 12b on the base end side and the road surface rs, the water w to flow from the ocean (or river) in a plane in the height direction. For example, the rotating parts 13a and 13b that can rotate at a predetermined angle are connected in the direction.

  Further, in the present invention, only the front door block 12a is configured so as to be able to rotate by a predetermined angle in the direction opposite to the inflowing water w so as to float in advance when water flows in. .

  Between the door bodies 12 and between the door body block 12a on the front end side and the door body block 12b on the base end side constituting each door body 12 are connected by a watertight rubber 14 between doors. Further, a watertight rubber 15 is provided on the side of the door body 12 on both sides opposite to the door contact d provided in the opening o of the seawall cl.

  The floating body connection type flap gate 11 of the present invention shown in FIG. 1 has a tip floating body block 16 with a buoyancy adjustment function installed in a range through which a person and a vehicle of the door block 12a on the front end side can pass. This tip floating body block 16 with a buoyancy adjustment function, as shown in FIG. 2, has a structure in which a buoyancy chamber 16a and a water intake tank 16b are provided.

  The buoyancy chamber 16a is for ensuring the buoyancy of the tip floating body block 16 with a buoyancy adjustment function, and is provided on both sides. The inside of the buoyancy chamber 16a may be a cavity as shown in FIG. 2B, but may be filled with a foam material such as polyurethane foam, polystyrene foam, polyethylene foam, polypropylene foam or the like.

  On the other hand, the said water intake tank 16b is provided in the center part of the front-end | tip floating body block 16 with a buoyancy adjustment function. This water intake tank 16 is for taking in light inundation such as heavy rain and reducing the floating amount of the tip floating block 16 with buoyancy adjustment function, and the upper surface when the tip floating block 16 with buoyancy adjustment function is in a lying state. In addition, a lid 16c having an opening for taking in rainwater or the inflowing water is attached so as to be at the same height as the upper surface of the door body 12.

  As the lid 16c having the opening, any of grating, punching metal, or the like made of steel, cast iron, aluminum, stainless steel, or FRP (fiber reinforced plastic) is employed. Of these, the grating shape of the grating may be either square or rectangular. The hole shape of the punching metal may be any of a circle, a square, a rectangle, a triangle, a rhombus, a hexagon, an oval, a cross shape, and the like.

  The tip floating body block 16 with the buoyancy adjustment function having the above-described configuration collects rainwater due to rain from an opening provided in the lid 16c and collects it in the water intake tank 16b, thereby reducing the buoyancy and reducing the buoyancy adjustment function tip floating body block 16 with the buoyancy adjustment function. Suppresses ascent. If the lid 16c can be removed, the dust collected in the water intake tank 16b can be cleaned, and maintainability is ensured.

  In addition, a drainage device 17 is provided at the tip of the water intake tank 16b to prevent the rainwater remaining due to rainfall during the fall. The drainage device 17 may have any configuration as long as it exhibits the above-described action. For example, a single hinge type as shown in FIG. 2C, a check valve type as shown in FIG. The configuration of a single hinge type with a torsion spring as shown in FIG.

  Among these, as shown in FIG. 3 (a), the single hinge type drainage device 17 has an upper portion of the water stop plate 17a on the upper surface side of the drainage port 16bc provided in the tip wall surface 16ba of the water intake tank 16b. Is attached rotatably. And the lower surface side of this water stop plate 17a is made to contact | abut to the front-end | tip of lower wall surface 16bb of the said water intake tank 16b.

  When such a one-hinge type drainage device 17 is installed, as shown in FIG. 3B, when the water level of the water intake tank 16b is lower than the external water level, the water stop plate 17a is caused by the external water pressure. Is pressed against the tip of the lower wall surface 16bb of the water intake tank 16b to close the drain port 16bc and prevent the entry of water w from the outside.

  On the other hand, when water accumulates in the intake tank 16b due to rain and the water level of the intake tank 16b becomes higher than the external water level, the water stop plate 17a is pushed by the water pressure from the inside of the intake tank 16b as shown in FIG. Then, the water w is discharged to the outside from the drain port 16bc.

  In the state where water has accumulated in the intake tank 16b, when a flood or tsunami strikes during rainfall, the water stop plate 17a is pressed against the tip of the lower wall surface 16bb of the intake tank 16b due to the water flow or the above-described water level difference. Water does not enter the water intake tank 16b from 16bc (see FIG. 3B).

  Further, when the tip floating body block 16 with the buoyancy adjustment function rises due to the invasion of flood or tsunami, as shown in FIG. 3 (d), the water w is discharged from the opening of the lid 16c so that the water w enters. The increase in weight due to the movement is reduced, and the delay in standing motion is improved.

  Next, as shown in FIG. 4A, the check valve type drainage device 17 is a drainage provided on the tip side of the lower wall surface 16bb of the water intake tank 16b in the tip floating body block 16 with the buoyancy adjustment function in the lying state. A check valve 17b is attached to the inside of the intake tank 16b at the port 16bc. The check valve 17b includes a frustoconical valve body 17ba and a tension coil spring 17bb that presses the valve body 17ba against the drain port 16bc. The check valve 17b is configured to supply water w from the outside to the inside of the intake tank 16b. Only passage is allowed.

  On the other hand, the push member 17c is installed in the storage part r which stores the door body 12 at a position facing the check valve 17b when the tip floating body block 16 with a buoyancy adjustment function is in a lying state. And when the tip floating body block 16 with a buoyancy adjustment function is lying down, this pushing member 17c pushes the check valve 17b into the water tank 16b, as shown in FIG. The state where the drain port 16bc is opened is maintained.

  When such a check valve type drainage device 17 is installed, if there is a difference in water level between the inside and outside of the water intake tank 16b when lying down, the water w enters and exits through the drainage port 16bc, as shown in FIG. As described above, the buoyancy is reduced by operating so that the water levels inside and outside are equal.

  When a flood or tsunami strikes, the tip floating body block 16 with a buoyancy adjustment function rises, so that the push member 17c is separated from the valve body 17ba, and the valve body 17ba is pressed against the lower wall surface 16bb by the tension coil spring 17bb. Thus, the drain port 16bc is closed to prevent the water w from entering from the drain port 16bc.

  In addition, when water w is accumulated in the water intake tank 16b, as shown in FIG. 4C, the water w is discharged so as to spill out from the opening of the lid 16c as the tip floating body block 16 with buoyancy adjustment function rises. Therefore, the weight increase due to the penetration of the water w is reduced, and the delay in the standing operation is improved.

  Next, as shown in FIG. 5A, the single-hinge drainage device 17 with a torsion spring is provided on the distal end side of the lower wall surface 16bb of the intake tank 16b in the tip floating body block 16 with the buoyancy adjustment function in the lying state. A water stop plate 17d is attached to the inside of the water intake tank 16b at the drain port 16bc so as to freely rotate the front end side, thereby closing the drain port 16bc. The water stop plate 17d is always pressed against the lower wall surface 16bb of the water intake tank 16b by a torsion spring 17e.

  On the other hand, the push member 17c is installed in the storage part r which stores the door body 12 at a position facing the water stop plate 17d when the tip floating body block 16 with a buoyancy adjustment function is in a lying state. And when the tip floating body block 16 with a buoyancy adjustment function is lying down, this pushing member 17c pushes the water stop plate 17d into the water tank 16b, as shown in FIG. The state where the drain port 16bc is opened is maintained.

  When such a single-hinged drainage device 17 with a torsion spring is installed, if there is a water level difference between the inside and the outside of the water intake tank 16b when lying down, the drainage port is the same as in the case of the check valve type drainage device 17. The water w enters and exits through 16bc, and as shown in FIG. 5B, the buoyancy is reduced by operating so that the water levels inside and outside are equal.

  When a flood or tsunami strikes, the tip floating body block 16 with a buoyancy adjustment function rises, so that the push member 17c is separated from the water stop plate 17d, and the water stop plate 17d is pressed against the lower wall surface 16bb by the torsion spring 17e. As a result, the drain port 16bc is blocked, and the intrusion of the water w from the drain port 16bc is prevented.

  Further, when water is accumulated in the water intake tank 16b, as shown in FIG. 5 (c), water w is discharged from the opening of the lid 16c so as to spill with the standing operation of the tip floating body block 16 with buoyancy adjustment function. Therefore, the weight increase due to the penetration of the water w is reduced, and the delay in the standing operation is improved.

  In the floating-coupled flap gate 11 of the present invention configured as described above, light inundation such as heavy rain is taken into the intake tank 16b within the range where the front-end floating body block 16 with a buoyancy adjustment function of the front-end door block 12a is installed. The flying height is reduced. Therefore, as shown in FIG. 6, a person or a vehicle can pass through the range where the tip floating body block 16 with a buoyancy adjustment function is installed without hindrance.

  On the other hand, when a heavy flood such as a tsunami strikes or flood occurs, the water w accumulated in the water intake tank 16b is drained from the opening of the lid 1c by the standing floating body block 16 with buoyancy adjustment function, and the buoyancy is increased. Therefore, it is possible to prevent a delay in standing operation and to secure reliability as a disaster prevention facility.

  The present invention is not limited to the above examples, and it goes without saying that the embodiments may be changed as appropriate within the scope of the technical idea described in each claim.

  For example, in the example shown in FIG. 2A, the water intake tank 16b is formed from the front end side to the bottom side of the central portion, but as shown in FIG. 7A, the front end of the central portion is shown. You may form only in the side. Further, as shown in FIG. 7B, it may be formed over the entire width on the tip side. Moreover, as shown in FIG.7 (c), you may arrange | position the water intake tank 16b and the buoyancy chamber 16a alternately in the width direction.

  Further, in the example shown in FIG. 2A, the inside of the water intake tank 16b shows a hollow one, but as shown in FIG. An inclined portion 16bd may be provided. In this case, drainage from the opening of the lid 1c of the water w accumulated in the water intake tank 16b when the tip floating body block 16 with a buoyancy adjustment function is raised can be performed quickly. Further, sand mud does not accumulate on the opposite end side of the water intake tank 16b.

  Further, in the example shown in FIG. 1, the nine floating bodies 12 arranged in the width direction are provided with the front floating body block 16 with a buoyancy adjustment function installed in the three central door bodies 12. Or may be arranged on one side.

  Moreover, the door body 12 of the floating body connection type flap gate 11 to be applied is not limited to being divided into two parts, but may be divided into three parts, and the connection between the door bodies may be performed by a chain or a wire.

DESCRIPTION OF SYMBOLS 11 Floating body connection type flap gate 12 Door body 12a Front end side door body block 12b Base end side door body block 13a, 13b Rotating portion 16 Door block with buoyancy adjustment function 16a Buoyancy chamber 16b Water intake tank 16bc Drain port 16bd Inclined portion 16c Lid 17 Drainage device 17a, 17d Water stop plate 17b Check valve 17c Push member 17e Torsion spring

Claims (5)

A plurality of door blocks, which are installed at the opening or the entrance and are divided in the height direction so as to block the opening or the entrance through which the water flows, are arranged in a plane in the height direction in the direction of the flowing water. Floating body connected flap gates configured such that only the door block on the front end side in the height direction of the door body rotatably connected is rotatable by a predetermined angle in the direction opposite to the inflowing water,
In the range where the person and vehicle of the door block on the tip side can pass, a tip floating body block with a buoyancy adjustment function provided with a buoyancy chamber and a water intake tank inside is installed,
The water intake tank is provided with a lid formed with an opening for taking in rainwater or the inflowed water on the upper surface when the tip floating body block with a buoyancy adjustment function is in a lying state, and a drainage device is provided at the tip. Floating body connected flap gate characterized by being.   The floating body-connected flap gate according to claim 1, wherein an inclined portion having a downward slope from the upper surface in a lying state toward the tip is provided on the opposite end side of the water intake tank of the tip floating body block with buoyancy adjustment function. . The drainage device
The upper part of the water stop plate is rotatably attached to the upper surface of the drainage port provided on the front end wall surface of the water intake tank so that the lower surface side of the water stop plate contacts the front end of the lower wall surface of the water intake tank. The floating body-connected flap gate according to claim 1 or 2, wherein the floating gate is a floating gate. The drainage device
In order to allow only the passage of water from the outside to the inside of the water intake tank, the water intake tank in the drain outlet provided on the tip side of the lower wall surface of the water intake tank in the tip floating body block with the buoyancy adjustment function in the lying state A check valve mounted inside,
The storage unit for storing the door body is installed at a position facing the check valve when the tip floating body block with buoyancy adjustment function is in a lying state, and when the tip floating body block with buoyancy adjustment function falls, the reverse The floating body-connected flap gate according to claim 1 or 2, comprising a pushing member that pushes a stop valve into the water intake tank. The drainage device
In the suspended floating block with a buoyancy adjustment function in a lying state, a stop attached to the tip side of the water intake tank at the tip side of the lower wall surface of the water intake tank is rotatably attached to the inside of the water intake tank. A water plate,
A torsion spring that constantly presses the water stop plate against the lower wall surface of the water intake tank;
When the front floating block with a buoyancy adjustment function falls, the water blocking plate is installed at a position opposite to the water stop plate when the front floating block with a buoyancy adjustment function is in a lying state in the storage section for storing the door body. A floating member-connected flap gate according to claim 1 or 2, comprising a pushing member that pushes the water into the water intake tank.

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