JP6235403B2 - Floating flap gate - Google Patents

Description

  The present invention relates to a floating flap gate that is installed, for example, as a part of a tide embankment or at an opening of a tide embankment, and floats a door body so that seawater does not flow into the land during a tsunami or storm surge. It is suitable when the installation space is wide.

  There is a floating flap gate that does not flow into the land side during tsunamis and storm surges, and does not have a dangerous behavior of easily falling down and suddenly falling down when the water level drops (for example, Patent Document 1) .

  When such a floating-type flap gate is installed in a wide space, the door body is forcibly raised in the absence of water at the time of checking the operation, so that the deflection of the door body due to its own weight increases. When the deflection of the door body increases, the contact amount between the side watertight rubber and the side door (the amount of collapse of the side watertight rubber) changes before and after the door body rises, making it impossible to check for proper operation confirmation.

  A general tide door needs to be suppressed to a deflection of at least 1/600 or less when water pressure is applied, and it is necessary to reproduce the state when checking the operation.

  However, when the floating flap gate is installed in a wide space, it is necessary to increase the thickness of the door in order to keep the amount of deflection below the allowable value, and the weight of the door increases. An increase in the weight of the door body leads to an increase in the weight of the entire equipment, which increases costs.

JP 2013-245473 A

  The problem to be solved by the present invention is that when the floating flap gate is installed in a wide space, it is necessary to prevent the door body from being excessively bent during operation check. This increases the weight and increases the weight of the entire equipment.

  Even when the floating flap gate is installed in a wide area between the spans, the present invention does not increase the thickness of the door so that the deflection of the door during the operation check is not excessive. It was made for the purpose of restraining.

The present invention
A floating flap gate constructed so that the distal end side of the door body can rotate and float with the base end side as a fulcrum in a plane in the height direction in the direction of seawater flowing in when water increases due to tsunami, storm surge,
In the initial state, the suspension beam provided with an arch-shaped camber that has a maximum warping amount in the center in the longitudinal direction in the initial state, the camber is the door when the door body in the fall state is viewed from the front end side. Place it so that it is located above the body's levitation direction,
When the other end of the first rope having one end attached to the front end side of the door body or the suspension beam is attached to the counterweight via the first fixed pulley, the surrendering due to the inflow of seawater or the fall of the water level While arranging the first fixed pulley so that the counterweight becomes the lowest point in the middle,
When checking the operation, the other end of the second rope that attaches one end to the suspension beam is brought into contact with the side door via the second fixed pulley and the movable pulley that can move away from the second fixed pulley. It has the most main feature of installing on.

  In the above-mentioned present invention, when the suspended beam body is viewed from the distal end side, the suspended beam provided with the arch-shaped camber having the maximum amount of warpage in the longitudinal center portion in the initial state at the distal end portion of the door body The camber is positioned so as to be positioned above the floating direction of the door body.

  When checking the operation, the suspension beam bears the weight acting at the time of standing by attaching the one end of the second rope to the suspension beam and pulling it up separately from the floating due to the inflow of seawater. As a result, the door body will not be excessively bent.

  In the present invention, the suspension beam does not necessarily have to be configured integrally with the door body. When not configured integrally with the door body, the weight of the counterweight can be reduced if the suspension beam is separated from the door body and only the door body floats when seawater flows in.

  In the present invention, when checking the operation, the door body is raised by pulling the second rope attached to the suspension beam with a camber arranged at the tip of the door body separately from the standing time due to the inflow of seawater. The door body will not be excessively bent.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the floating type flap gate of this invention, (a) is sectional drawing which looked at the floating mechanism by inflow of water from the side surface, (b) is sectional drawing which looked at the standing mechanism at the time of operation | movement inspection from the side surface, c) It is sectional drawing in the AA position of the figure (a) seen from the front side. FIG. 5 is a view of the suspended beam as viewed from the front side of the door body in a lying state, in which (a) shows the initial shape, (b) shows the shape when checking the operation, and (c) shows the shape when the door body is lying down. It is. It is a figure explaining the installation state per floor slab and side part door in the floating type flap gate of this invention, (a) is sectional drawing seen from the front side, (b) is sectional drawing seen from the side surface side. It is a figure explaining the installation state of the suspension beam in the floating type flap gate of this invention, (a) is sectional drawing seen from the front side, (b) is sectional drawing seen from the side surface side. It is a figure explaining the installation state of the door in the floating-type flap gate of this invention, (a) is sectional drawing seen from the front side, (b) is sectional drawing seen from the side surface side. It is a figure explaining the fastening state of the suspension beam and door body in the floating type flap gate of this invention, (a) is sectional drawing seen from the front side, (b) is sectional drawing seen from the side surface side. It is a figure explaining the attachment state of the counterweight in the floating-type flap gate of this invention, (a) is sectional drawing seen from the front side, (b) is sectional drawing seen from the side surface side. It is a figure explaining the 2nd wire, the 2nd fixed pulley, a moving pulley, and a lever block (trademark) installed at the time of the check of operation check of the floating type flap gate of the present invention, and (a) was seen from the front side. Sectional drawing and (b) are sectional drawings seen from the side. It is the whole floating-type flap gate outline figure of the 2nd present invention, (a) is a figure seen from the plane side, and (b) is a sectional view seen from the side. It is a figure similar to FIG. 1 of the floating-type flap gate of 3rd this invention. It is a figure similar to FIG. 1 of the floating-type flap gate of 4th this invention.

  Even when the floating-type flap gate is installed in a wide space, the deflection of the door body at the time of checking the operation is not affected by the hydraulic action without increasing the thickness of the door body. The purpose is to keep it at a minimum.

  And the purpose is that when the hanging door body is viewed from the front end side, the hanging beam is provided with an arched camber with the maximum amount of warpage in the center in the longitudinal direction in the initial state of the door body. The camber is positioned so that it is located above the floating direction of the door, and when checking the operation, the door is raised by pulling the second rope attached to the suspension beam separately from the floating due to the inflow of seawater. It was realized by letting.

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

  In FIG. 1, reference numeral 1 denotes a floating flap gate of the present invention installed on the top end face of a tide embankment as a part of a tide embankment, for example. This floating-type flap gate 1 uses the water pressure of seawater that is approaching when a tsunami or storm surge occurs to float and swing the distal end side 2b of the door body 2 with the rotation center 2a on the proximal end side as a fulcrum. Is to prevent inflow to the land side.

  In the example shown in FIGS. 1 and 3 to 11, the door body 2 constituting the floating flap gate 1 is integrally formed in the width direction. Side watertight rubbers g (see FIG. 9) are provided on both sides of the door body 2. However, a plurality of door bodies 2 may be connected in the width direction, and the door bodies 2 may be connected by an inter-door watertight rubber. In this case, side watertight rubber is provided on the side of the door body 2 on both sides opposite to the side door contact 3 provided on the outside.

  The floating flap gate 1 of the present invention shown in FIG. 1 has a suspension beam 4 attached to the entire region in the width direction of the lower horizontal portion of the upper horizontal girder 2c from which the tip of the door body 2 protrudes, for example. ing. When checking the operation, the door 2 is held up by the suspension beam 4 and raised separately from the rising due to the inflow of seawater. That is, in the present invention, the weight that acts at the time of standing at the time of checking the operation confirmation is borne by the suspension beam 4.

  As shown in FIG. 2 (a), the suspension beam 4 is used with an arch-shaped camber with a central portion in the longitudinal direction having a maximum warpage amount, for example, δ, as shown in FIG. By doing so, it is possible to allow a load to be applied from the initial state of FIG. 2 (a) until it is deflected by δ (2δ in total) on the opposite side to the initial state as shown in FIG. 2 (b). become able to. When the door body 2 is in a lying state, the suspension beam 4 is landed on the entire lower surface of the suspension beam 4 as shown in FIG. 2C due to the weight of the door body 2 and the weight of the suspension beam 4. The amount of warpage is determined so as to be in a horizontal state.

  In the embodiment shown in FIG. 1, the shaft portions 4a on both ends of the suspension beam 4 penetrate the guide grooves 3a provided on the side doors 3 on both sides and protrude into the storage portion. One end of the first wire rope 5 is attached to the side shaft portion 4a. The other end of the first wire rope 5 is installed in the storage portion of each side door door 3, for example, at the same height position above the distal end and the proximal end side of the door body 2 when lying down. It is attached to the counterweight 7 via the fixed pulleys 6a and 6b.

  The first fixed pulley 6a installed above the front end of the door body 2 at the time of lying down has the counterweight 7 at the lowest point during the ascent of the door body 2 due to the inflow of seawater or the way down when the water level is lowered. Install in such a position.

  In addition, one end of the second wire rope 8 is attached to the outside of the shaft portion 4 a of the suspension beam 4 where one end of the first wire rope 5 is attached. The other end of the second wire rope 8 is interposed through a second constant pulley 9 and a moving pulley 10 installed above the base end side of the door body 2 in the storage portion of each side door door 3. It is fixed to the ceiling in the storage part of 3 per side door.

  Reference numeral 11 denotes a lever block (registered trademark) 11 that is attached to the movable pulley 10 at the time of checking the operation. The lever block (registered trademark) 11 is used to separate the movable pulley 10 from the second fixed pulley 9. Move to the direction of the floor, for example, 3 floors per side door.

  Next, the assembly procedure of the floating flap gate 1 according to the present invention will be described with reference to FIGS.

  A floor slab 22 is installed on a frame 21 on which the floating flap gate 1 of the present invention is installed, and side door stops 3 are installed on both sides of the floor slab 22 (see FIG. 3). At this time, it installs so that the guide groove 3a of the side doors 3 of both sides may oppose.

  Next, the suspension beam 4 is installed by penetrating the shaft 4a on both ends into the guide groove 3a of the side door contact 3. When the suspended beam 4 is installed, the arched camber is positioned on the upper side of the door body when the lying door body 2 is viewed from the distal end side. In this state, a gap d is formed between the suspension beam 4 and the floor slab 22 in the center in the longitudinal direction (see an enlarged portion of FIG. 4A).

  After the suspension beam 4 is installed, the door body 2 is installed so that the suspension beam 4 is positioned below the tip of the door body 2. In the state in which the door body 2 is installed, the gap between the longitudinal center of the suspension beam 4 and the floor slab 22 is eliminated by the weight of the door body 2 and the weight of the suspension beam 4 (enlargement of FIG. 5A). Part reference).

  After the installation of the door body 2 is completed, the door body 2 and the suspension beam 4 are fastened and integrated with a bolt 23 (see FIG. 6).

  After the door body 2 and the suspension beam 4 are integrated, the first fixed pulley 6a, at the same height position on the upper end and the base end side of the door body 2 in the fallen state of the storage part 3 per side door. 6b is installed. Thereafter, the other end of the first wire rope 5 having one end attached to the shaft portion 4a on both ends of the suspension beam 4 is attached to the counterweight 7 via the first constant pulleys 6a and 6b (see FIG. 7). .

  In the floating flap gate 1 of the present invention described above, when the seawater that has rushed flows into the land side beyond the floating flap gate 1 when a storm surge or tsunami occurs, the rushed seawater enters the door 2. Due to the buoyancy generated by the action, the door body 2 floats without power and without human operation. At the start of the ascent, the counterweight 7 is lowered to assist the ascent of the door body 2.

  As the water level increases, the door 2 rises, but the counterweight 7 rises after the counterweight 7 reaches the lowest point during the rise of the door 2. As a result, the ascent speed of the door body 2 is reduced, and the impact when the ascent is completed is reduced.

  When the water level is lowered due to storm surge or tsunami, the counterweight 7 is lowered, and the door 2 is pulled down in the falling direction to follow the falling water level, but the counterweight 7 is at the lowest point. After reaching the position, the counterweight 7 rises to become resistance, decelerates the yielding speed of the door body 2, and alleviates the impact when the yielding is completed.

  On the other hand, when the door body 2 is erected at the time of checking the operation, a lever block (registered trademark) 11 is attached to the movable pulley 10 and the movable pulley 10 is moved toward the floor 3 per side door. Force body 2 to stand up. Since the weight acting at the time of standing is borne by the suspension beam 4, the door body 2 is not excessively bent. After completion of the operation check, the lever block (registered trademark) 11 is removed.

  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, the installation mode of the first constant pulleys 6a and 6b and the installation mode of the lever block (registered trademark) 11 in the storage unit of 3 per side door are not limited to the embodiment shown in FIG.

  For example, as shown in FIG. 9, the first fixed pulley 6a may be arranged only above the front end of the door body 2 when lying down. The third fixed pulley 12 is installed on the floor slab 22, and the other wire rope 13 having one end attached to the movable pulley 10 is attached to the ceiling via the third constant pulley 12. What attached to the block (trademark) 11 may be used.

  In the embodiments shown in FIGS. 1 and 9, the suspension beam 4 is configured integrally with the door body 2. However, in the case where the suspension beam 4 is floated by the inflow of seawater as in the embodiments shown in FIGS. The suspension beam 4 may be separated from the door body 2 and only the door body 2 may float.

  When the suspension beam 4 is not configured integrally with the door body 2 in this way, the suspension beam 4 does not float with the door body 2 when ascending due to the inflow of seawater, so the weight of the counterweight 7 is reduced. be able to.

  In FIG. 10, the shaft portion 2 d is protruded on both sides of the front end side of the door body 2, one end of the first wire rope 5 is attached to the shaft portion 2 d of the door body 2, and the shaft portion 4 a of the hanging beam 4 is attached to the second portion. Only one end of the wire rope 8 is attached.

  In the embodiment of FIG. 10, the shaft portion 2 d of the door body 2 to which one end of the first wire rope 5 is attached is closer to the door body 2 than the shaft portion 4 a of the suspension beam 4 to which one end of the second wire rope 8 is attached. It becomes the base end side, and the width of the guide groove 3a provided in the side door contact 3 is increased. Further, since the attachment position of one end of the first wire rope 5 is closer to the rotation center 2a side of the door body 2, the counterweight 7 needs to be slightly heavy.

  On the other hand, in the embodiment of FIG. 11, as in FIG. 10, one end of the first wire rope 5 is attached to the shaft portion 2 d of the door body 2, and one end of the second wire rope 8 is attached to the shaft portion 4 a of the hanging beam 4. However, the shaft portion 4 a of the suspension beam 4 is disposed vertically below the shaft portion 2 d of the door body 2.

  In the example shown in FIG. 11, it is not necessary to increase the weight of the counterweight 7 compared to FIG. 10, but it is necessary to increase the digging depth of the storage portion of the door body 2.

  In the embodiment shown in FIG. 9, the tension rod 24 that defines the floating upper limit position of the door body 2 is installed, but the tension rod 24 is not necessarily an essential member.

  In the above example, the door body 2 is erected using the lever block (registered trademark) 11 at the time of checking the operation check, but a chain block, a hydraulic cylinder, and a winch may be used.

  Further, the hanging position of the hanging beam 4 may not be at both ends of the door body 2 as in the above embodiment.

  In the above embodiment, wire ropes are used for the first and second ropes 5 and 8, but polyamide, polyester, polyethylene, polypropylene, aramid, polyarylate, ultrahigh density polyethylene. A fiber rope such as may be used.

DESCRIPTION OF SYMBOLS 1 Floating type flap gate 2 Door body 2a Center of rotation 2b Front end side 2c Upper horizontal girder 2d Door body shaft part 3 Side door contact 3a Guide groove 4 Hanging beam 4a Hanging beam shaft part 5 1st wire rope 6a, 6b 1st 7 Counterweight 8 Second wire rope 9 Second constant pulley 10 Moving pulley 11 Lever block (registered trademark)
12 Third fixed pulley 13 Third wire rope 21 Housing 22 Floor slab 23 Bolt 24 Tension rod g Side watertight rubber δ Warp amount

Claims (4)

A floating flap gate constructed so that the distal end side of the door body can rotate and float with the base end side as a fulcrum in a plane in the height direction in the direction of seawater flowing in when water increases due to tsunami, storm surge,
In the initial state, the suspension beam provided with an arch-shaped camber that has a maximum warping amount in the center in the longitudinal direction in the initial state, the camber is the door when the door body in the fall state is viewed from the front end side. Place it so that it is located above the body's levitation direction,
When the other end of the first rope having one end attached to the front end side of the door body or the suspension beam is attached to the counterweight via the first fixed pulley, the surrendering due to the inflow of seawater or the fall of the water level While arranging the first fixed pulley so that the counterweight becomes the lowest point in the middle,
When checking the operation, the other end of the second rope that attaches one end to the suspension beam is brought into contact with the side door via the second fixed pulley and the movable pulley that can move away from the second fixed pulley. Floating flap gate, characterized in that it is mounted on.   The said suspension beam is not comprised integrally with the said door body, and when it floats by the inflow of seawater, the suspension beam is separated from the door body and only the door body floats. Floating flap gate.   One end of the first rope is attached to the distal end side of the door body, and the attachment position of the one end of the first rope is provided closer to the proximal end side of the door body than the attachment position of the one end of the second rope. The floating flap gate according to claim 1 or 2, wherein   The one end of the first rope is attached to the front end side of the door body, and the one end of the second rope is attached vertically below the attachment position of the one end of the first rope. 2. A floating flap gate according to 2.

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