JP5718792B2 - Floating flap gate - Google Patents

Description

  The present invention relates to a floating flap gate that is installed at, for example, an opening of a breakwater and raises a door to block the opening so that the increased water does not flow into a living space or underground space when the water increases. is there.

  In order to prevent the increased water from flowing into the living space and underground space at the time of water increase, a floating flap gate that floats the door using the buoyancy generated by the water that is about to flow in, for example, blocks the breakwater opening. There is (for example, Patent Document 1).

  However, the floating flap gate disclosed in Patent Document 1 has a problem that when the initial velocity of the inflow is high, the floating operation of the door body 1 is delayed and overflows into the living space or the underground space (FIG. 6 (a )reference).

  Further, when the water level is lowered, the door body 1 shows a dangerous behavior in which the door body 1 is maintained up to a water level that is about 1/3 of the door body 1 and then suddenly falls (FIG. 6). (See (b)).

  Among the above-mentioned problems, a floating flap gate has been proposed in which the other end of a rope having a counterweight attached to one end is connected to a door body via a pulley in order to prevent overflow in the initial stage of inflow (for example, Patent Documents). 2 of FIG. 6).

  The floating flap gate proposed in FIG. 6 of Patent Document 2 compensates for insufficient buoyancy of the floating flap gate with the weight of the counterweight, thereby solving the delay in the floating operation of the door body at the initial inflow. .

  However, as in the case of the floating flap gate proposed in FIG. 6 of Patent Document 2, when the weight of the counterweight is always applied in a direction that assists the floating operation of the door, it is difficult to fall down when the water level is lowered. Become.

JP 2001-214425 A JP 2003-253912 A

  The problem to be solved by the present invention is that the floating operation of the door body is always assisted in order to solve the problem of the floating flap gate that overflows into the living space and underground space due to the delay of the floating operation of the door body at the beginning of inflow. When a device is installed, it is difficult to fall down when the water level drops.

  The present invention does not delay the floating operation of the door body at the beginning of the inflow, overflows into the living space or underground space, does not become difficult to fall down even when the water level is low, and suddenly falls down It was made with the aim of avoiding any behavior.

  In addition, the second object of the present invention is to make it possible to easily stand up when it is desired to stand up at the time of inspection or when it is desired to stand up beforehand.

The floating flap gate of the present invention is
Installed at the opening or the entrance, when water flows in, the distal end side of the door body has a base end side as a fulcrum in a plane in the height direction in the direction of the flowing water to block the opening or the entrance. A floating flap gate configured to be able to stand and swing,
One end of the rope is attached to the front end of the door body, and the other end of the rope is attached to the drum via a fixed and moving combined pulley, a fixed pulley, and a suspension pulley of a counterweight, and the drum has a rotation mechanism. And only when the drum is rotated, the fixed and moving combined pulley can be moved closer to the fixed pulley along with the rotation of the drum.
When the drum is non-rotating at all times, the fixed and moved position is such that the counterweight is at the lowest point when the inclination angle of the door body with respect to the horizontal plane in the middle of standing or lying down is within a predetermined range. With the combined pulley positioned, the counterweight moves up and down with the inflow and outflow of water, so that the door body is erected, the shock is absorbed when the erection is completed, and the water level is tracked when lying down.
At the time of artificially raising and lowering the door body, the fixed and moving combined pulley is moved relative to the fixed pulley by rotating the drum forward and backward by a rotating mechanism while preventing the counterweight from being lowered by a stopper. The main feature is that the door body is moved up and down by moving it toward and away.

  In the present invention described above, the drum is normally non-rotating, and the angle of inclination of the door body with respect to the horizontal plane in the middle of standing or lying down is within a predetermined range, for example, the door body inclination angle at the time of completion of standing is 90 with respect to the horizontal. In the case of degrees, the fixed and moving combined pulley is located at the position where the counterweight becomes the lowest point when the angle is within 10 degrees to 80 degrees. Done.

  When the door body stands, the door body is pulled by the counterweight in the standing direction until the counterweight reaches the lowest point, and the standing is assisted. When the counter weight exceeds the lowest position, the counter weight acts as a resistance, and the rising speed of the door body is reduced.

  Further, when the door body is lying down, the door body is pulled by the counterweight in the lying down direction until the counterweight reaches the lowest point, thereby assisting in following the lowering of the water level. When the counterweight falls from a position where the lowest point is reached, the counterweight becomes a resistance and the falling speed of the door body is reduced.

On the other hand, at the time of artificially raising and lowering the door body, the door body is swung up and down as follows.
First, the counterweight is prevented from dropping by a stopper. When the door body stands, the drum is rotated by driving the rotation mechanism in a state in which the counterweight is prevented from being lowered. The rotation of the drum causes the fixed and moving combined pulley to move toward the fixed pulley while the rope is wound around the drum, and the fallen door body swings upright.

  In addition, when the door body is lying down, if the rotating mechanism is driven and the drum is reversed while preventing the counterweight from descending, the fixed and moving pulley is separated from the fixed pulley by the reversal of the drum. While moving, the rope is unwound from the drum, and the door body in the standing state is swaying and swinging.

  In the present invention, the set inclination angle with respect to the horizontal plane of the door body in the middle of standing up or lying down is used as a branch point to assist the standing up or lying down of the door body or resistance to standing up or lying down. In addition to preventing flow, sudden lodging can be prevented before lodging is completed. Moreover, the impact at the time of completion of standing up can be reduced, and the followability to the water level is improved in the initial stage of lodging.

  On the other hand, when artificially raising and lowering the door body, the door body can be raised and lowered simply by rotating the drum in the forward and reverse directions after preventing the counterweight from being lowered by the stopper.

It is a schematic block diagram of the floating-type flap gate of this invention. It is a figure explaining the mechanism which performs the raising / lowering operation | movement of the artificial door body of the floating type flap gate of this invention, (a) is the figure seen from the side surface direction, (b) is the figure seen from the plane direction. It is the figure which showed an example of the turning force of the door body standing direction by the inclination-angle of a door body and the counterweight in the floating-type flap gate of this invention. It is a figure explaining the principle of operation of the floating-type flap gate of the present invention at the normal time, (a) is the initial stage of inflow, (b) is the middle stage or standing, (c) is the late stage of standing, (d) is the early stage of lodging, ( e) is a diagram showing the late stage of lodging. It is a figure explaining the operation | movement principle at the time of the raising / lowering operation of the artificial door body of the floating type flap gate of this invention, (a) is before standing up, (b) is in the middle of standing up, (c) is in the standing up completion period, ( d) is a diagram showing the late stage of lodging. It is a figure explaining the problem of the conventional floating body type flap gate, (a) is an inflow initial stage, (b) is the figure which showed the time of the water level fall.

  The purpose of the present invention is not to overflow into the living space or underground space at the beginning of the inflow, and to prevent falling down even when the water level is low, and to prevent falling down suddenly. This was achieved by using the set inclination angle with respect to the horizontal plane as a branching point to assist the standing or falling of the door body or to resist standing or falling.

  In addition, if you want to stand up at the time of inspection or if you want to stand up in advance, the drum is rotated after the counterweight is prevented from being lowered by a stopper for the purpose of making it possible to stand up easily. Realized.

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 floating flap gate of the present invention.

  In FIG. 1, reference numeral 11 denotes a floating flap gate of the present invention installed on a road surface rs of an opening of a breakwater, for example. The floating flap gate 11 uses the buoyancy and water pressure generated by the flowing water w as a fulcrum when the water w tries to flow from the ocean (or river) into the living space or underground space. As described above, the front end side 12b of the door body 12 is swung upright to block the opening in a watertight state.

  The door body 12 constituting the floating flap gate 11 has a structure in which a plurality of door bodies 12 are connected in the width direction of the opening when the width of the opening to be blocked is wide. Connected by watertight rubber. Further, watertight rubber is provided on the side of the door body 12 on both sides opposite to the door stop provided at the opening of the breakwater.

  The floating flap gate 11 of the present invention shown in FIG. 1 has a function of attaching one end of a wire rope 14 and supporting a hydraulic load, for example, one rod 13 is attached to the entire width direction of the front end portion of the door body 12. doing.

  The other end of the wire rope 14 is attached to the drum 19 via a suspension pulley 18 with a fixed and moving pulley 15, a fixed pulley 16, and a counterweight 17 suspended thereon.

  Of these, the fixed / moving pulley 15 is attached so that the door 20 can move horizontally from the upper end of the door 12 toward the base end of the door 12 when lying down. The fixed pulley 16 is installed at the same height as the fixed and moving pulley 15 on the base end side of the door body 12.

  On the other hand, the drum 19 is installed on the opposite side of the fixed and moving pulley 15 with the fixed pulley 16 in between, and the suspension pulley 18 of the counterweight 17 is movable up and down between the drum 19 and the fixed pulley 16. It is suspended by a rope 14.

  Reference numeral 21 denotes a rotating mechanism of the drum 19, which is wound around a chain 21c between a sprocket 21a attached to the output shaft of the worm gear reducer and a sprocket 21b attached to the rotating shaft 19a of the drum 19 as shown in FIG. The drum 19 is rotated forward and reverse. Note that reference numeral 22 in FIG. 2 denotes a bearing that rotatably supports the drum 19.

  In the present invention, the fixed and movable pulley 15 can be moved toward and away from the fixed pulley 16 by the rotation of the drum 19.

  For example, in FIG. 2, a sprocket 22a is rotatably disposed on the anti-fixed pulley 16 side of the fixed / movable pulley 15, and is fixed to a chain 22c wound between the sprocket 22a and the sprocket 22b attached to the rotary shaft 19a. The thing which attached the rotating shaft 15a of the movable pulley 15 is shown. In such a configuration, the fixed / moving pulley 15 moves toward and away from the fixed pulley 16 in synchronization with the rotation of the drum 19.

  In FIG. 2, in order to smoothly move the fixed / moving pulley 15 to and from the fixed pulley 16, wheels 22d are attached to both ends of the rotating shaft 15a of the fixing / moving pulley 15, and the child wheels are attached. It shows what moves on the guide rail 22e laid between the fixed and moving combined pulley 15 and the fixed pulley 16. FIG.

  As in the example of the present invention, if the inclination angle θ of the door body 12 at the completion of standing is set to 90 degrees from the horizontal, for example, the fixed and moving combined pulley 15 at the time is When the inclination angle θ (see FIG. 3) with respect to the horizontal plane becomes 45 degrees, for example, the counterweight 17 is positioned at the lowest point.

  According to the results of investigations by the inventors, in the case of a flap gate with the door inclination angle at the completion of standing up being, for example, 90 degrees from the horizontal, the inclination angle θ at which the counterweight 17 is the lowest point is in the range of 10 degrees to 80 degrees. Then it is known that there is no problem. In the case of a flap gate with a tilt angle of the door body less than 90 degrees from the horizontal, for example 75 degrees, when the standing up is completed, the upper limit of the tilt angle θ at which the counterweight 17 is at the lowest point is a problem-free range. Needless to say, the door body inclination angle is smaller than 80 degrees when the door inclination angle is 90 degrees from the horizontal.

  In the floating flap gate 11 of the present invention having the above-described configuration, when the drum 19 is not rotating at all times, the rotating mechanism 21 is set to a position where the door body 12 lies down, and the drum 19 is rotated, fixed and moved. The pulley 15 is fixed by a self-lock mechanism of the worm gear reducer. And when the door body 12 stands up in such a state and the door body 12 falls, the following functions are exhibited.

(When the door 12 stands)
At the beginning of the inflow, the counterweight 17 is lowered, and the door body 12 is pulled in the standing direction to assist the standing (see FIG. 4A). When the inclination angle θ of the door body 12 with respect to the horizontal plane becomes 45 degrees, for example, the door body 12 and the wire rope 14 are aligned (see FIG. 4B), and the counterweight 17 is at the lowest end position. When the inclination angle θ of the door body 12 with respect to the horizontal plane exceeds 45 degrees, for example, the counterweight 17 rises due to the standing swing of the door body 12, so the counterweight 17 acts as a resistance to reduce the rising speed of the door body 12. Then, the impact force at the time of completion of standing is relieved (see FIG. 4C).

(When the standing door 12 is lying down)
In the initial stage of lodging, the counterweight 17 is lowered, and the door body 12 is pulled in the falling direction and follows the drop in the water level (see FIG. 4D). When the inclination angle θ of the door body 12 with respect to the horizontal plane becomes 45 degrees, for example, the door body 12 and the wire rope 14 are aligned (see FIG. 4B), and the counterweight 17 is at the lowest end position. When the inclination angle of the door body 12 with respect to the horizontal plane becomes smaller than 45 degrees, for example, the counterweight 17 rises due to the fall of the door body 12, so the counterweight 17 acts as a resistance to reduce the fall speed of the door body 12, and The impact force upon completion is reduced (see FIG. 4E).

  The relationship between the inclination angle θ of the door body 12 in the floating flap gate 11 of the present invention and the turning force in the door body standing direction by the counterweight 20 (for example, the flap gate having a door body inclination angle of 90 degrees from the horizontal when the standing up is completed) 3) is shown in FIG.

  As described above, in the floating flap gate 11 of the present invention, when the drum 19 is not rotating at all times, a plurality of functions are used by using a standing / falling mechanism having a counterweight 17 to assist the standing of the door 12. , Impact mitigation and water level tracking are possible.

  On the other hand, the floating flap gate 11 of the present invention having the above-described configuration will be described below when artificially raising and lowering the door body 12 such as when standing up at the time of inspection or when standing up in advance. Then, the door body 12 is raised and lowered.

  First, prior to the standing of the door body 12, the lower limit stopper 23a is set to prevent the counterweight 17 from descending. The upper limit stopper 23b is fixed at the upper limit position of the counterweight 17 in order to prevent the counterweight 17 from rising (see FIG. 5A).

(When the door 12 stands)
After setting the lower limit stopper 23a and preventing the counterweight 17 from moving up and down, the rotating mechanism 21 is driven to rotate the drum 19 in the forward direction. As the drum 19 rotates in the forward direction, the fixed / moving pulley 15 winds the wire rope 14 around the drum 19 while moving closer to the fixed pulley 16 as shown in FIG. As described above, the door body 12 in the lying state is swung upright.

(When the standing door 12 is lying down)
When the door body 12 is lying down, the drum 19 is reversed by driving the rotating mechanism 21 in a state where the counterweight 17 is prevented from moving up and down. As the drum 19 is reversed, the fixed and moving pulley 15 moves in a direction away from the fixed pulley 16 as shown in FIG. 5 (d) and rewinds the wire rope 14 from the drum, as shown in FIG. 5 (a). The door 12 in the standing state is laid down.

  The present invention is not limited to the above-described example, and it is needless to say that the embodiment may be appropriately changed within the scope of the technical idea described in the claims.

  For example, in the above-described embodiment, one rod 13 is attached to the entire width direction of the front end portion of the door body 12, but the rod 13 may be attached to both sides of the door body 12. Instead of the rod 13, a suspension piece may be attached to the tip of the door body 12 and one end of the wire rope 14 may be attached to the suspension piece.

  Moreover, in the said Example, although the wire rope 14 is used, you may use fiber ropes, such as a polyamide type, a polyester type, a polyethylene type, a polypropylene type, an aramid type, a polyarylate type, and an ultra high density polyethylene. .

  Moreover, although the floating body type flap gate in which the door body 12 is configured by a single floating body is shown in the above embodiment, the present invention may be applied to a floating body connection type flap gate in which a plurality of floating bodies are connected in the height direction.

  The forward / reverse rotation of the rotation mechanism 21 may be performed electrically or manually. Further, an engine or the like may be used.

  Further, the speed reducer preferably uses a worm gear having a self-locking mechanism as in the above-described embodiment, but if there is a function of locking the door body 12 other than during the raising / lowering operation, a gear having no self-locking mechanism is used. What used brakes etc. together may be used.

  The transmission of power from the rotating mechanism 21 to the drum 19 and transmission of power from the drum 19 to the fixed / moving pulley 15 are not limited to the chains 21c and 22c and the sprockets 21a, 21b, 22a and 22b, and are adjusted according to the hoisting. As long as the position can be defined, wire drive, feed screw drive, or the like may be used.

DESCRIPTION OF SYMBOLS 11 Floating type flap gate 12 Door body 12a Base end side 12b Tip side 13 Rod 14 Wire rope 15 Fixed and moving combined pulley 16 Fixed pulley 17 Counterweight 18 Counterweight hanging pulley 19 Drum 21 Rotating mechanism 23a Lower limit stopper 23b Upper limit stopper

Claims (1)

Installed at the opening or the entrance, when water flows in, the distal end side of the door body has a base end side as a fulcrum in a plane in the height direction in the direction of the flowing water to block the opening or the entrance. A floating flap gate configured to be able to stand and swing,
One end of the rope is attached to the front end of the door body, and the other end of the rope is attached to the drum via a fixed and moving combined pulley, a fixed pulley, and a suspension pulley of a counterweight, and the drum has a rotation mechanism. And only when the drum rotates, the fixed and moving combined pulley can be moved toward and away from the fixed pulley as the drum rotates.
When the drum is non-rotating at all times, the fixed and moved position is such that the counterweight is at the lowest point when the inclination angle of the door body with respect to the horizontal plane in the middle of standing or lying down is within a predetermined range. With the combined pulley positioned, the counterweight moves up and down with the inflow and outflow of water, so that the door body is erected, the shock is absorbed when the erection is completed, and the water level is tracked when lying down.
At the time of artificially raising and lowering the door body, the fixed and moving combined pulley is moved relative to the fixed pulley by rotating the drum forward and backward by a rotating mechanism while preventing the counterweight from being lowered by a stopper. A floating flap gate characterized in that the door body is moved up and down by moving toward and away from it.

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