JP5845051B2 - Side watertight structure of floating flap gate - Google Patents

Description

  The present invention is, for example, a door body in a floating flap gate that is installed at an opening of a breakwater and floats up to block the opening so that the increased water does not flow into a living space or underground space when the water increases. And the watertight structure between the side doors.

  There is a floating flap gate that lifts the door using the buoyancy of the water to be introduced so that the increased water does not flow into the living space or underground space when the water increases, for example, to block the opening of the breakwater ( For example, Patent Document 1).

  In this floating flap gate, as a method of watertightness between the floated door and the side doors on both sides of the door, side watertight rubber is attached to the side surface of the door opposite to the side doors (for example, patents) Reference 2).

  However, as shown in FIGS. 1 and 2 of Patent Document 2, the side door contact of the conventional undulation gate is configured in the same plane, so the amount of pressure-bonding of the side watertight rubber to the side door contact Is always constant regardless of the standing angle of the door.

  At this time, the amount of crimping of the side watertight rubber to the side doors depends on the maximum design water depth, so if the door is standing at a shallow angle and the water depth is low, useless pressing force is generated. Will be.

  In particular, in the case of an undulating gate that stands up by buoyancy or water pressure without power, at the stage where water begins to flow in, the door body does not stand up immediately when water flows in due to the useless pressing force, and it stands up late. Therefore, water leakage is likely to occur.

  In addition, when an unexpected water pressure is applied when the door is standing, the side watertight rubber is pressed only against the surface of the side door so that the side watertight rubber is warped. Deformation, permanent set remains and lowers the subsequent watertight performance.

  Further, since the large pressing force acts on the side doors configured in the same plane even in the normal limit, the side watertight rubber remains permanently strained over time, and the watertight performance is deteriorated.

  Thus, in the case of an undulating gate that stands up by buoyancy or water pressure without power, how to reduce the resistance associated with the pressure bonding of the side watertight rubber to the side door contact becomes a problem.

JP 2001-214425 A Japanese Utility Model Publication No. 62-72333

  The problem to be solved by the present invention is that the side door contact of the conventional floating-type flap gate is configured in the same plane, so that the water-tight rubber on the side is always fixed regardless of the standing angle of the door body. It is that it becomes.

  In order to solve the above-mentioned problems, the present invention provides a side watertight structure of a floating flap gate that can solve the problems of a conventional watertight structure by setting the amount of crimping according to the standing state of the door body. It was made for the purpose.

The side watertight structure of the floating flap gate of the present invention is
Installed at the opening or entrance, when water flows in, the distal end rises with the base end as the center of rotation in a plane in the height direction in the direction of the inflowing water to block the opening or entrance. A watertight structure between the door and the side door of the floating flap gate having a swinging door,
The amount of pressure applied to the side door contact surface of the side watertight rubber attached to the side of the door body is gradually increased from the lying down state to the middle of standing up to the maximum design from the middle of standing up to the standing limit. the value as such so that in accordance with the water depth, and the most important feature that the distance between the side watertight rubber and side doorstop face made different for each area.

  In the above-mentioned present invention, the distance between the side watertight rubber attached to the door body and the surface of the side door is made different for each region so as to obtain a necessary crimping amount according to the standing state of the door body. Therefore, useless sliding resistance in the watertight structure portion is reduced, and the door body is easily raised.

  In the present invention, in the case where a convex step portion is further formed in the boundary portion on the standing direction side of the side watertight rubber attached to the side portion of the standing door body in the surface per side door. The watertight performance of the door body in the standing state is improved.

  Further, in the present invention described above, when the amount of crimping to the surface per side door of the side watertight rubber attached to the side surface portion of the door body in the limit of lodging is zero, the door body is The collapse allowance of the side watertight rubber when in a lying state can be minimized.

  In the present invention, since a necessary amount of crimping according to the standing state of the door body is obtained, useless sliding resistance in the watertight structure portion is reduced, and the door body is easily raised. Therefore, the floating operation of the door body at the beginning of inflow when water begins to flow in becomes faster, so that the inflow of water can be prevented and water leakage can be effectively prevented.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic explaining the side part watertight structure of the floating type flap gate of this invention, (a) is the figure seen from the side, (b)-(e) is crimping | bonding to the side door contact of side part watertight rubber | gum. (A) It is the elements on larger scale seen from arrow AA of a figure explaining a state, (b) is a figure of the 1st field where the door body is in a lying state, (c) is the tip side from the 1st field The figure of the 2nd area | region which rotates in the opposite direction to the water into which only the door body block flows in, (d) is the figure of the 3rd area | region where a door body stands from the boundary line of a 2nd area | region to a standing limit, e) is a view when the door body is in the standing limit. It is the schematic explaining the side part watertight structure of the floating type flap gate of this invention, and is the figure which looked at the side door stop and door body of one side from the plane side.

  The purpose of the present invention is to vary the distance between the side watertight rubber attached to the side surface portion of the door body and the surface per side door for each region for the purpose of adjusting the amount of crimping according to the standing state of the door body. Realized.

Hereinafter, the form for implementing this invention is demonstrated in detail using FIG.
FIG. 1 is a view for explaining a side watertight structure of a floating flap gate of the present invention.

  In FIG. 1, reference numeral 1 denotes a floating flap gate that is installed on the road surface of an opening of a breakwater, for example, and has a door 2 with a floating body inside.

  The floating flap gate 1 uses the water pressure of the flowing water as the center of rotation C as the rotation center C when water is about to flow into the living space or underground space from the ocean (or river). The opening is blocked in a watertight state by swinging the tip side upright.

  The floating flap gate 1 shown in FIG. 1 is obtained by dividing a door body 2 into two in the height direction of a base body side door body block 2a and a distal end side door body block 2b. And these both door body blocks 2a and 2b are connected with the direction of the water which flows in from the said opening part so that rotation is possible within the plane of a height direction, and only the door body block 2b of the front end side of a height direction flows in the said. It is configured to be rotatable by a predetermined angle in the direction opposite to water (see the imaginary line in FIG. 1A).

  There is one (single) door body 2 constituting this floating-type flap gate 1, and side watertight rubber is provided on both sides of the door body 2 opposite to the side door contact 3 provided in the opening of the breakwater. 4 is provided.

  In the present invention, the pressure bonding amount δ of the side watertight rubber 4 to the surface 3a of the side door contact 3 is made different for each region so that a necessary pressure bonding amount according to the standing state of the door body 2 can be obtained. This is the main feature.

  Specifically, when the door body 2 is in the lying state shown in FIG. 1 (a), the first area A1 of the side door contact 3 to which the side watertight rubber 4 is pressure-bonded is zero. Then, the position of the side watertight rubber 4 with respect to the surface 3a of the side door contact 3 is determined (see FIG. 1B).

  By doing in this way, the crush margin of the side part watertight rubber 4 can be minimized, and the permanent distortion added to the side part watertight rubber 4 can be reduced.

  Next, from the area A1 where the amount of crimp δ is zero, the area A2 in which only the door block 2b on the distal end side indicated by the imaginary line in FIG. 1A rotates, for example, by 15 ° in the direction opposite to the water flowing in from the opening. Is gradually increased linearly from zero (see FIG. 1C).

  By doing in this way, the floating operation | movement of the door body 2 in the inflow initial stage where water begins to flow in becomes quick, can prevent inflow of water, and can prevent water leakage effectively.

  Next, the crimping amount δ in the third area A3 where the door body 2 stands up from the boundary line of the area A2 where only the front end side door body block 2b rotates by 15 ° is the maximum design as in the prior art. The value is set according to the water depth (see FIG. 1 (d)).

  Thus, in the present invention in which the amount of pressure δ of the side watertight rubber 4 to the surface 3a of the side door 3 is varied depending on the region depending on the standing state of the door body 2, the wastefulness in the watertight structure portion is obtained. The sliding resistance is reduced, and the door body 2 is easily raised.

  In addition to the above configuration, a convex step portion 5 is further formed at the boundary portion A4 of the side watertight rubber 4 attached to the standing body 2 on the surface 3a of the side door contact 3 on the standing direction side. In this case, the side watertight rubber 4 is pressure-bonded not only to the surface 3a of the side door 3 but also to the stepped portion 5 (see FIG. 1 (e)).

  Accordingly, the pressure-bonding area of the side watertight rubber 4 is increased, and the watertight performance when the door body 2 is standing can be improved. Moreover, even when unexpected water pressure acts on the door body 2, it can prevent that a side part watertight structure part deform | transforms so that it may warp.

  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, although the above example has been described as applied to a floating body-connected flap gate in which a plurality of door blocks are connected, the door may be applied to a single flap gate that is not divided into a plurality of door blocks. Needless to say.

  In the above example, the second region A2 is linearly increased in the amount of crimping, but may be increased in a curve.

DESCRIPTION OF SYMBOLS 1 Floating-type flap gate 2 Door 2a Base end side door block 2b Tip end door block 3 Side door stop 3a Surface 4 Side watertight rubber 5 Step

Claims (3)

Installed at the opening or entrance, when water flows in, the distal end rises with the base end as the center of rotation in a plane in the height direction in the direction of the inflowing water to block the opening or entrance. A watertight structure between the door and the side door of the floating flap gate having a swinging door,
The amount of pressure applied to the side door contact surface of the side watertight rubber attached to the side of the door body is gradually increased from the lying down state to the middle of standing up to the maximum design from the middle of standing up to the standing limit. in so that such a value corresponding to the water depth, the side watertight rubber and side watertight structure of floating flap gate, characterized in that the distance between the side doorstop face made different for each area.   2. A convex step portion is further formed at a boundary portion of the side watertight rubber, which is attached to a side surface portion of the door body in the standing limit, on a side door side surface. The side watertight structure of the floating flap gate described in 1.   The floating body type according to claim 1 or 2, characterized in that the amount of press-fitting to the surface per side door of the side watertight rubber attached to the side surface portion of the door body at the lodging limit is zero. Flap gate side watertight structure.

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