JP6480221B2 - Side watertight structure of floating flap gate - Google Patents

Description

  The present invention is installed at, for example, an opening of a seawall, and a side portion of a floating flap gate which raises a door body and closes the opening in order to prevent the entry of a tsunami or high tide when a tsunami occurs or when high tide occurs. It relates to the watertight structure.

  When a tsunami occurs or when a storm surge occurs, a floating flap gate that closes the opening may be installed at the opening of the tide embankment in order to prevent the intrusion of the tsunami or the storm surge.

  The floating flap gate of this type is provided with a buoyancy forming portion in the door body, and the tip end side of the door body with the base end side as a fulcrum, utilizing the water pressure flowing in from the opening of the seawall and the buoyancy of the door body itself. Stand up and close the opening.

  As shown in FIG. 3, the floating flap gate 1 has both ends 3 a of the watertight rubber 3 with a U-shaped cross section attached to both sides of the door 2, and the central curved portion 3 b protrudes from both sides of the door 2. Watertightness of the side portion is maintained by causing the side walls 4 arranged on both sides of the door 2 to abut (for example, Patent Document 1).

  In FIG. 3, 2 a indicates the base end side of the door 2, and 2 b indicates the tip side of the door 2. Further, reference numeral 5 denotes a pressing plate for pressing both ends 3a of the watertight rubber 3 when the watertight rubber 3 is attached to the door 2, 6 denotes a mounting bolt of the watertight rubber 3, and 7 denotes watertight rubber at the bottom.

  In the side watertight structure described above, since the central curved portion 3b of the U-shaped watertight rubber 3 is easily deformed, the door 2 is in the standing operation (see FIG. 4A) and in the falling operation (FIG. 4 (b) The sliding resistance of both) decreases. Further, for example, when the door 2 reverses from the standing operation to the lying operation, the central curved portion 3b is deformed to maximize the sliding resistance, but the maximum sliding resistance value is reduced.

  In the case of the side watertight structure described above, when the door 1 is erected, the water pressure (indicated by the arrow) presses the central curved portion 3b of the watertight rubber 3 against the side wall 4 as shown in FIG. By acting to change the shape of the central curved portion 3b, it is possible to withstand high water pressure and maintain a watertight state.

  However, when the water level falls and the door falls, as shown in FIG. 4 (b), the water pressure (indicated by the arrow) acts to pull the central curved portion 3 b of the watertight rubber 3 away from the side wall 4. Water pressure resistance decreases, which becomes a problem when dealing with high water depth.

  That is, the water pressure acting on the door 2 is different in the height direction of the door 2, and since the water pressure increases at the base end side 2a of the door 2 because the water depth is deeper, the watertight rubber 3 It becomes easy to fall down.

Japanese Utility Model Publication No. 62-72333

  The problem to be solved by the present invention is that, in the case of the side watertight structure of the conventional floating flap gate, when the water level drops and the door body falls, the water pressure resistance is lowered and the water depth is coped with. It is a point that becomes a problem.

  The present invention has been made to improve the water pressure resistance of the side watertight structure when the door is laid down so that the floating flap gate can cope with high water depth.

The present invention
In the plane of the height direction with respect to the direction of the inflowing water at the time of water increase, the door body of the floating type flap gate in which the front end side of the door body is pivotable up and down with the base end side as a fulcrum Watertight structure between side walls provided on both sides of the body,
Water-tight rubber having a U-shaped cross section attached to both sides of the door so that a central curved portion protrudes and abuts on the side wall;
When attaching the watertight rubber to both sides of the door, it has a pressing plate for pressing the watertight rubber against the door;
The main feature of the present invention is that a watertight rubber fall prevention member that protrudes to the side wall side beyond the pressing plate is attached to the non-watertight rubber side of the pressing plate.

  According to the present invention, since the watertight rubber anti-falling member protruding to the side wall side from the pressing plate is attached to the non-watertight rubber side of the pressing plate pressing the watertight rubber against the door, the water pressure acting at the time of the folding operation of the door As a result, the central curved portion of the watertight rubber is not deformed and collapsed more than necessary.

  In the present invention, the water pressure resistance can be adjusted by adjusting the amount of protrusion of the water-tight rubber against the side wall.

  Further, in the present invention, when the watertight rubber fall prevention member is divided in the height direction of the door, it is possible to obtain optimum water pressure resistance in the height direction of the door.

  In the present invention, since the central curved portion of the watertight rubber is not deformed and collapsed more than necessary by the water pressure acting during the falling movement of the door, the pressing force on the side wall of the central curved portion can be secured, and the water pressure resistance is improved. can do.

It is a figure explaining the side watertight structure of the floating type flap gate of this invention, (a) is the figure which showed the state which attached the watertight rubber to the side part of the door, (b) is the time of the fall operation of a door. The figure which showed the state, (c) is a figure which showed the state after completing inversion, after inversion at the time of standing-up operation of a door body to fall operation. The figure which showed the door and side wall part in the fall state of the floating type flap gate provided with the side watertight structure of this invention, (a) is a top view before attaching the fall prevention member of watertight rubber, (b) is (A) Arrow view AA of a figure, (c) is a top view after attaching the fall prevention member of watertight rubber, (d) is arrow AA view of (c) figure. It is a figure explaining the side watertight structure of the conventional floating type flap gate, (a) is a top view of a floating type flap gate, (b) is a side view similarly, (c) is a side watertight rubber from the cross section direction. The figure which looked at, (d) is an arrow AA figure of the (a) figure. (A) is explanatory drawing of the side watertight part at the time of standing-up operation of a door, (b) is explanatory drawing of the side watertight part at the time of lying operation of a door.

  The present invention has the object of improving the water pressure resistance of the side watertight structure when the door falls down, on the side opposite to the watertight rubber of the pressing plate pressing the watertight rubber against the door and on the side wall side of the pressing plate. It realized by attaching the fall prevention member of the watertight rubber which protrudes.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2.
1 and 2 are diagrams for explaining the side watertight structure of the floating flap gate of the present invention.

  In FIG. 1 and FIG. 2, when attaching the watertight rubber 3 having a U-shaped cross section on both sides of the door 2 of the floating flap gate 1 when the door 2 is in the upright state, It is a member for preventing the watertight rubber from falling and is attached to the side of the watertight rubber (the downstream side) of the pressing plate 5 pressing the both end portions 3a of the rubber 3 against the door 2 (the downstream side).

  When the watertight rubber 3 is attached to the door 2, the watertight rubber 3, the pressing plate 5, and the fall prevention member 11 are disposed in this order from the upstream side to the downstream side when the door 2 is in the upright state. The bolt 6 is penetrated in order from the prevention member 11 side to the pressing plate 5 and the both end portions 3 a of the watertight rubber 3, and the door 2 2 is tightened and fixed.

  For example, the distance C between the door 2 and the side wall 4 is 15 mm for small and medium-sized applications with a height of less than 2.5 m for the door 2 and large-sized applications with a height of 2.5 m or more for the door 2 It is 30 mm. The watertight rubber 3 to be used has a Shore hardness of 40 to 60, a thickness of 3 mm, and a U-shaped inner surface spacing of 6 mm for the small to medium size door 2 from the door 3 to the side wall 4 side. Attach 20 mm to project. Further, in the door 2 for large size, one having a Shore hardness of 40 to 60, a thickness of 6 mm, and a U-shaped inner surface distance of 12 mm is attached so as to protrude 40 mm from the door 3 to the side wall 4 side.

  As shown in FIG. 2A, the pressing plate 5 is attached at a position apart from the end in the width direction of the door 2 by a fixed distance from the end except the base end side 2a of the door 2. However, the base end side 2a of the door 2 is shaped so as to reach the end in the width direction of the door 2, and the watertight rubbers 3 and 7 of the side and the bottom are overlapped and sandwiched. Further, a portion for pressing the base end side 2a of the door 2 of the pressing plate 5 protrudes on the side wall 4 side to prevent the watertight rubber 3 from escaping (see FIG. 3A).

  In the present invention, as shown in FIG. 2 (b), the fall prevention member 11 is not attached to the front end side 2b of the door 2, and the fall prevention member 11 is attached only to the portion excluding the front end 2b of the door 2. . The water pressure acting on the door 2 is different in the height direction of the door 2, and the base end side 2a of the door 2 has a large water pressure because the water depth is deep, and the base of the door 2 during the falling operation of the door 2. Since the watertight rubber 3 on the end side 2a tends to fall down, the fall prevention member 11 is attached to the base end side 2a of the door 2. On the other hand, since the tip side 2b of the door 2 has a small water pressure at a shallow depth, the escape of the watertight rubber 3 acting at the time of the falling movement of the door 2 is small, and the watertight rubber 3 is not pulled away from the side wall 4, It is not necessary to attach the fall prevention member 11 to the front end side 2b of the door 2.

  By mounting the anti-falling member 11 apart from the watertight rubber 3 by a predetermined distance A (the thickness of the pressing plate 5), a space in which the watertight rubber 3 can be reversed can be secured to alleviate the increase in sliding resistance. . The distance A is 4 to 10 mm in the case of the door 2 for medium and small size, and 9 to 20 mm in the case of the door 2 for large size.

  In addition, since the central curved portion 3b of the watertight rubber 3 can be prevented from being deformed more than necessary by the water pressure acting (indicated by the arrow) as shown in FIG. The pressing force of the watertight rubber 3 on the side wall 4 can be secured, and the water pressure resistance is improved.

  It goes without saying that the water pressure resistance and the sliding resistance at the time of the standing operation of the door 2 are not affected even if the fall prevention member 11 of the watertight rubber 3 is attached.

  At this time, for example, as shown in FIG. 2A, the through hole 11a of the mounting bolt 6 opened in the anti-falling member 11 is a long hole toward the side wall 4, and the distance B between the anti-falling member 11 and the side wall 4 is If it can be changed, it is possible to adjust the water pressure resistance at the time of the falling movement of the door 2.

  That is, in order to improve the water pressure resistance, the distance B between the fall prevention member 11 and the side wall 4 is adjusted to be narrow to reduce the escape of the watertight rubber 3, while to reduce the sliding resistance, the distance B is adjusted widely. Thus, the pressing force of the watertight rubber 3 against the side wall 4 is relieved.

  When the distance B between the anti-falling member 11 and the side wall 4 is changed, the increase of the water pressure resistance and the sliding resistance is almost proportional to the increase of the sliding resistance within a range where the required water pressure can be secured. It is important to set not to pass.

  The distance B between the fall prevention member 11 and the side wall 4 is adjusted in the range of 6 to 12 mm in the case of the door 2 for medium or small size, and in the range of 12 to 24 mm in the case of the door 2 for large size.

  Since the water pressure acting on the door is different in the height direction of the door 2, the fall preventing member 11 is divided in the height direction of the door 2 as shown in FIG. By adjusting the distance B for each preventing member 11, it is possible to obtain optimum water pressure resistance in the height direction of the door 2.

  The present invention is not limited to the above-described example, and it goes without saying that the embodiment may be appropriately modified within the scope of the technical idea described in each claim.

  For example, in the embodiment shown in FIG. 2, the fall prevention member 11 is divided in the height direction of the door 2, but it may not be divided in the height direction of the door 2.

  Although the embodiment shown in FIGS. 1 and 2 shows the plate-like fall prevention member 11, it may not be plate-like as long as the amount of fall of the watertight rubber 3 can be adjusted.

  Further, in the embodiment shown in FIGS. 1 and 2, the anti-falling member 11 is attached to the non-watertight rubber side of the pressing plate 5 by the mounting bolt 6 so as to be in contact with the pressing plate 5. However, if it is possible to arrange the watertight rubber 3 without disturbing the inversion, the mounting bolt 6 may not be used to be in contact with the pressing plate 5.

  Moreover, although the case where the side watertight structure of the present invention is applied to a floating flap gate installed at an opening of a seawall is described in the specification, a floating body installed at an opening of a levee such as a river embankment It may be applied to a flap gate.

Reference Signs List 1 floating type flap gate 2 door 2a base end side 2b front end side 3 watertight rubber 3a both ends 3b central curved portion 4 side wall 5 pressure plate 6 mounting bolt 11 fall prevention member 11a through hole

Claims (3)

In the plane of the height direction with respect to the direction of the inflowing water at the time of water increase, the door body of the floating type flap gate in which the front end side of the door body is pivotable up and down with the base end side as a fulcrum Watertight structure between side walls provided on both sides of the body,
Water-tight rubber having a U-shaped cross section attached to both sides of the door so that a central curved portion protrudes and abuts on the side wall;
When attaching the watertight rubber to both sides of the door, it has a pressing plate for pressing the watertight rubber against the door;
A floating body characterized in that a watertight rubber anti-falling member is provided on the side opposite to the watertight rubber of the pressing plate so as to protrude further to the side wall than the pressing plate and capable of adjusting the amount of protrusion to the side wall. Watertight structure on the side of the flap gate. In the plane of the height direction with respect to the direction of the inflowing water at the time of water increase, the door body of the floating type flap gate in which the front end side of the door body is pivotable up and down with the base end side as a fulcrum Watertight structure between side walls provided on both sides of the body,
Water-tight rubber having a U-shaped cross section attached to both sides of the door so that a central curved portion protrudes and abuts on the side wall;
When attaching the watertight rubber to both sides of the door, it has a pressing plate for pressing the watertight rubber against the door;
A watertight rubber anti-falling member is attached to the side opposite to the watertight rubber of the pressing plate, which protrudes to the side wall side beyond the pressing plate and is divided in the height direction of the door. Side watertight structure of the flap gate. The side watertight structure of the floating type flap gate according to claim 1 or 2, characterized in that the watertight rubber fall prevention member is attached only to a portion other than the front end side of the door.

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