JP2017223112A - Flap gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flap gate suitable even when installed in a long place of a span of an opening part such as a dam body top end surface of a tide embankment.SOLUTION: A land type flap gate 11 comprises a plurality of door bodies 13 for standing-rocking the tip to a fulcrum 13a, a counterweight 17 and a rope 14 for installing one end in a rear end part of the door bodies 13 and installing the other end on the counterweight 17. Standing blocks 16a and 16B are installed for guiding the rope 14 by the door bodies 13 so that the counterweight 17 is positioned in the lowest point in the middle of standing or in the middle of falling down.EFFECT: A mechanism for imparting auxiliary force to door body operation can be constructed regardless of long-short of a span by being provided under the rear end side of the respective door bodies. A suspension part 13b of a flotation confirmation inspection weight 24 is provided in a rear end part of the door bodies, so that a burden of maintenance is also reduced.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flap gate. More specifically, for example, the present invention relates to a land-type flap gate installed at a wide opening such as a levee body top end surface of a seawall as a countermeasure against storm surge and tsunami.

  For example, it is installed at the opening of a breakwater, and when the water is increased, the door is raised by using the buoyancy of the water to flow in so that the increased water does not flow into the living space or underground space, and the opening is blocked. There is a floating flap gate (for example, Patent Document 1).

  When such a floating-type flap gate is installed on the top of the tide wall, the height required only in an emergency can be obtained, and the height of the levee can be lowered except in an emergency. The side view is improved and the landscape is not obstructed.

  However, in the case of a floating flap gate laid on the top of the seawall, the length of the part that prevents the inflow of seawater is longer than the floating flap gate installed at the opening of the breakwater. The number of door bodies to be increased increases and the number of connecting portions between the door bodies increases. Furthermore, it is difficult to give an assisting force to the standing action or the lying action of the door only by the both sides of the floating flap gate.

  As shown in FIG. 8, the door bodies are connected to each other by welding the flanges 2 to the entire adjacent side surfaces of the door body 1, and superposing the watertight rubber 3 and the pressing plate 4 on the surfaces of the flanges 2. Between the watertight rubber 3 and the pressing plate 4 of both door bodies 1, a waterproof film 5 that connects both door bodies 1 in a watertight manner is interposed and tightened with bolts 6 and nuts 7 at predetermined intervals. .

  By the way, in addition to the visual inspection of the appearance, the floating flap gate needs to periodically perform a rising confirmation test at the start of standing, and an operation confirmation test from the standing state to the standing state and from the standing state to the lying state.

  When performing the rising confirmation test at the start of standing, and the operation checking test between the lying state and the standing state, in the case of a floating flap gate laid on the top of the levee body, the number of doors to be connected increases. Therefore, it becomes difficult to check all the doors at once.

  In particular, in the case of the rising confirmation inspection at the start of standing up, the connection between all the adjacent door bodies is released so as not to be affected by the adjacent door bodies. It takes a great deal of time to remove a large number of bolts and nuts that are attached with a water-tight film that is connected in a watertight manner.

JP 2012-241449 A

  The problem to be solved by the present invention is that when the floating flap gate is installed on the top end surface of the seawall of the tide embankment, when it is introduced as a countermeasure against inundation with a long span opening, both sides of the floating flap gate In order to give the auxiliary force to the operation of the door body only by the part, the installation width is structurally limited, and a great deal of labor is required for the rising confirmation inspection at the start of standing.

  In order to solve the above-mentioned problem, the present invention can be constructed regardless of the length of the span by providing a mechanism for giving an assisting force to the door body operation below the rear end side of each door body. The purpose is to reduce the burden of maintenance when performing a confirmation inspection and an operation confirmation inspection between the lying state and the standing state.

The present invention
A plurality of door bodies whose tips rise and swing with respect to the fulcrum;
Counterweight,
A rope having one end attached to the rear end of the door body and the other end attached to the counterweight;
The main feature is that it comprises a fixed pulley that guides the rope so that the counterweight is positioned at the lowest point while the door is standing or lying down.

  In the above-mentioned present invention, the counterweight assists the standing or lodging at the start of standing or lodging while the door body is standing or lying in the middle, while standing or lodging resistance is completed before the standing or lodging is completed. Acts as Accordingly, the followability to the water level is improved at the start of standing or lodging, while the impact of standing or lodging can be mitigated before completion of standing or lodging.

  For the above-mentioned present invention, when the water blocking film that seals between adjacent door bodies in a watertight manner is provided so as to have a trapezoidal shape in which the width gradually increases from the rear end side to the front end side, Independently of the door body, the tip end side of the door body is allowed to stand at a certain angle.

  Further, when a weight suspension for confirming the start of standing is provided at the rear end of the door body of the present invention, the lifting confirmation inspection weight is simply suspended from the suspension. It is possible to perform a check-up check at the start.

  In addition, the rear end of the door body of the present invention is provided with a hanging portion of a movable pulley for confirming the operation between the lying state and the standing state, and the door is disposed below the rear end side of the door body. If a fixed pulley for movement confirmation that guides the rope wound around the movable pulley suspended on the body and a winch for winding the rope are arranged, the winding between the lying state and the standing state can be achieved by winding with the winch. Can be confirmed.

  In the present invention, at the start of standing or lodging, the followability to the water level is improved, and before the completion of standing or lodging, the impact of standing or lodging can be mitigated, and in addition, confirmation of rising at the start of standing is desired. It is possible to confirm the rising at the start of standing by simply suspending the weight for checking the rising at the rear end of the door body.

  In addition, the operation check inspection between the lying state and the standing state is performed by suspending the operation check inspection moving pulley at the rear end portion of each door body in place of the ascent check inspection weight, and fixing the movable pulley and the movable check fixed By simply winding the rope wound around the pulley with a winch, it is possible to check the operation between the lying state and the standing state.

  Further, in the present invention, since the counterweight and the fixed pulley are installed below the rear end side of the door body, when the door body is in a lying state, there is no component of the flap gate above the door body, Does not obstruct the landscape.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the land type flap gate of this invention, (a) is the figure which looked at the fallen door body from the plane side, (b) is the figure seen from the side surface side of the fallen door body, (c) Is a view seen from the front end side of the lying door body, and (d) is a view seen from the rear end side of the lying door body. It is the figure which showed the watertight structure between the adjacent door bodies of the land type | mold flap gate of this invention, (a) is the figure seen from the side of the fallen door body, (b) is the fallen door body. The perspective view seen from the front end side, (c) is the figure which looked at the water stop film from the plane direction. In the land-type flap gate of the present invention, it is a perspective view seen from the rear end side of the door body showing a state in which the weight for checking for ascent at the start of rising is checked, (a) The figure shows the case where one lifting confirmation inspection weight is hung on one rear end of the door body, (b) shows one lifting confirmation inspection weight suspended on the rear end portion of the door body. (C) is a figure at the time of suspending two weights for ascending confirmation inspection at one place of the rear end portion of the door body. It is the figure which looked at the example of the watertight structure of the door body bottom part in the land type flap gate of this invention, and the fulcrum structure of a standing swing from the side surface side of the fallen door body. In the land-type flap gate of this invention, it is the figure which showed the state at the time of performing the operation check inspection between a lying state and a standing state, (a) is the figure seen from the side of the door body in a lying state, (b) These are the figures seen from the rear end side of the fallen door body. In the land-type flap gate of this invention, it is the figure which showed the other example of arrangement | positioning of the fixed pulley which guides the rope which attached the counterweight to the other end, (a) is the figure seen from the side surface side of the fallen door body (B) is the figure seen from the rear end side of the door body in the lying state. It is a figure similar to FIG. 6 at the time of using a drum instead of the fixed pulley of the Example shown in FIG. It is the figure which looked at the watertight structure between the door bodies which the conventional flap gate adjoins from the front end side of the door body.

  The present invention can be constructed regardless of the length of the span, and the purpose of reducing the maintenance burden when performing the rising confirmation test at the start of standing, and the operation checking test between the lying state and the standing state, This is realized by providing a mechanism for assisting the operation below the rear end side of each door body, or by providing a weight hanging portion for confirming the start of standing at the rear end portion of the door body.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIGS.
FIG. 1 is a schematic configuration diagram of a land-type flap gate according to an embodiment of the present invention.

  In FIG. 1, 11 is a land type flap gate of the present invention installed on, for example, the levee body top end surface 12a of the tide embankment 12, and is erected by seawater that has pushed over the tide embankment 12 when a storm surge or tsunami occurs Thus, seawater does not flow into the land side from the seawall 12. In FIGS. 1A and 1B, the left side of the drawing is the sea side, and the right side of the drawing is the land side.

  As shown in FIG. 1A, the land-type flap gate 11 is formed by connecting a plurality of door bodies 13 in a line, and as shown by an imaginary line in FIG. The tip side that is located on the sea side swings upright.

  Then, one end of the rope 14 is attached to, for example, two places on the rear end surface of each of the door bodies 13 and the other end of the rope 14 is installed on the land side of the rear end portion of the door body 13. It is attached to the counterweight 17 via, for example, two fixed pulleys 16a and 16b installed in the land-side internal space of the rear end portion of the column 15 that is substantially the same height as the surface of the door 13 in the state.

  At this time, in the fixed pulleys 16a and 16b, the counterweight 17 is at the lowest point while the door body 13 is standing or lying down, and at the start of standing or lodging, the standing pulley is assisted, and the standing is completed. Before it is installed, it will act as a resistance to standing or lodging.

  The land-type flap gate 11 of the present invention having such a configuration inhibits the landscape when the door body 13 is in a lying state, because no component of the land-type flap gate 11 exists above the door body 13. There is nothing.

  On the other hand, when the storm surge or tsunami occurs and the seawater that has rushed tries to flow over the seawall 12 to the land side, the buoyancy generated by the rushing seawater acting on the door body 13 causes the door body 13. Stands without power and without human intervention. At the start of the standing, the counterweight 17 is lowered to assist the standing of the door body 13.

  The door body 13 rises as the water level increases, but the counterweight 17 rises after the counterweight 17 reaches the lowest point while the door body 13 is standing up. Thus, the rising speed of the door body 13 is reduced, and the impact at the time of completion of the rising is mitigated.

  When the water level is lowered due to storm surge or tsunami, the counterweight 17 descends, and the door 13 is pulled down in the falling direction to follow the drop in the water level, but the counterweight 17 is at the lowest point. After reaching the position, the counterweight 17 rises to become resistance, decelerates the yield speed of the door body 13, and relieves the impact when the yield is completed.

  In the land-type flap gate 11 of the present invention in which a plurality of door bodies 13 are connected in a line, adjacent door bodies 13 are connected while maintaining a watertight state.

  As shown in FIGS. 2 (a) and 2 (b), this connection is performed at opposite positions on the top of the levee body top end surface 12a of the seawall 12 and the land-side slope 12b of the levee body. In the connecting structure, flanges 18 are welded and joined to adjacent side end surfaces and bottom surfaces of the door body 13, and a water blocking film 20 is disposed on the surfaces of these flanges 18 via a watertight rubber 19. The structure is pressed and tightened with bolts 22 and nuts 23. In this embodiment, the water blocking film 20 that seals between adjacent door bodies 13 in a watertight manner has a width from the rear end side to the front end side of the door body 13 as shown in FIG. A trapezoidal shape that gradually expands is adopted.

  The water blocking film 20 that seals the space between the adjacent door bodies 13 in a water-tight manner in this way is formed into a trapezoid whose width gradually increases from the rear end side to the front end side of the door body 13, thereby adjacent door bodies 13. Independently, the front end side of the door body 13 is allowed to stand at a certain angle, for example, 3 °.

  Therefore, when performing the rising confirmation test for rising start, as shown in FIG. 1 (d), the floating confirmation check is performed on the suspension part 13b provided at the rear end of the door body 13 where the rising confirmation for rising start is desired. It is possible to perform a rising confirmation test at the start of standing up by simply suspending the weights 24 without releasing the connection of the adjacent door bodies 13. It should be noted that the ascent and check weight 24 is about 10 to 20 kg that can be held by a human.

  If the front end side of the door body 13 can stand up, for example, by 3 ° during the rising confirmation inspection at the start of standing, one lifting confirmation inspection weight 24 is suspended at one position on the rear end portion of the door body 13. (FIG. 3A), two may be hung (FIG. 3C). Alternatively, one piece may be hung from each of the two rear end portions of the door body 13 (FIG. 3B).

  However, independently of the adjacent door body 13, the front end side of the adjacent door body 13 is disposed so that the front end side of the door body 13 stands, for example, exceeding 3 ° and no force acts on the water blocking film 20. As shown in FIG. 1C, it is desirable that the two are loosely connected using a chain 25, for example. The connecting means is not limited to the chain 25 as long as the same function and effect can be obtained.

  On the other hand, as shown in FIG. 4, the watertightness between the door body 13 and the land-side slope 12b is achieved by connecting the skin plate 13c of the door body 13 and the watertight hardware 13d on the housing side with a watertight rubber 26. Is secured.

  As shown in FIG. 4, for example, the plurality of doors 13 of the watertight structure connected in the structure have two pins 13e and 13f at different radial positions around the fulcrum 13a on both side surfaces of the door 13. Is provided. And the guide metal object 27 which formed two circular arc guide holes 27a, 27b having the same radius as these pins 13e, 13f is installed on the land side slope 12b of the seawall 12, and when the door body 13 falls down, The pins 13e and 13f are guided by arcuate guide holes 27a and 27b. In this case, the arc lengths of the guide holes 27 a and 27 b are determined according to the upright swing angle on the distal end side of the door body 13.

  If such a structure is adopted, since there is no rotating shaft at the fulcrum 13a of the swinging of the door body 13, the watertight line can be continued. Further, the hydraulic load acting on the door body 13 is supported at two points of the pins 13e and 13f and the end portion 13ga of the stringer 13g of the door body 13, and is transmitted to the housing.

  FIG. 5 shows a mechanism for performing an operation check inspection between the lying state and the standing state. This mechanism includes, for example, a movable check fixed pulley 30 that guides a rope 29 wound around an operation check inspection movable pulley 28 suspended from the suspension portion 13b installed on the rear end surface of the door body 13, and the rope 29. The winding winch 31 is disposed below the rear end side of the door body 13.

  In the case of such a configuration, as shown in FIG. 5 (b), instead of the weighting check inspection weight 24, the operation check inspection moving pulleys 28 are suspended from the rear end portions of the door bodies 13, respectively. By winding the rope 29 wound around the movable pulley 28 and the movable confirmation fixed pulley 30 with the winch 31, it is possible to check the operation between the lying state and the standing state.

  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 above embodiment, with the two fixed pulleys 16a and 16b, the counterweight 17 becomes the lowest point while the door body 13 is standing or falling, and assists the standing or falling at the start of standing or falling, It acts as a resistance to standing or lodging before completion of standing or lodging. However, if it is possible to achieve the same action, a single fixed pulley 16 may be used as shown in FIG. Further, as shown in FIG. 7, a drum 32 may be employed instead of the fixed pulley 16.

  In the above-described embodiment, the lifting confirmation inspection weight 24 and the operation confirmation inspection movable pulley 28 are suspended on the same suspension portion 13b. However, both the suspensions 24 and 28 may be suspended at different positions. .

  Further, the water blocking film 20 is not particularly limited with respect to other properties, such as the presence or absence of stretchability, as long as it can block between adjacent door bodies 13 in a watertight manner.

DESCRIPTION OF SYMBOLS 11 Land type flap gate 12 Seawall 13 Door body 13a Support point 13b Suspension part 14 Rope 16a, 16b Fixed pulley 17 Counterweight 20 Water stop film 24 Lifting check inspection weight 28 Operation check check pulley 29 Rope 30 Fixed pulley 31 winch

Claims (3)

A plurality of door bodies whose tips rise and swing with respect to the fulcrum;
Counterweight,
A rope having one end attached to the rear end of the door body and the other end attached to the counterweight;
A flap gate, comprising: a fixed pulley that guides the rope so that the counterweight is positioned at the lowest point while the door body is standing or lying down.   The flap gate according to claim 1, further comprising a weight hanging portion for confirming start of standing at a rear end portion of the door body.   The rear end portion of the door body is provided with a hanging portion of a movable pulley for confirming the operation between the lying state and the standing state, and is hung on the door body below the rear end side of the door body. The flap gate according to claim 1 or 2, further comprising a movable confirmation fixed pulley for guiding a rope wound around the movable pulley, and a winch for winding the rope.

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