JPH1171715A - Floating bridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the passage of ships through a floating bridge and to simply ensure operation of a ship. SOLUTION: A floating bridge is provided with floating bodies 10; cable bodies 12; elevation devices 14; and gangway footplates 30. The floating bodies 10 the peripheries of which are closed have a watertightness and are formed in a square hollow box-form state, and arranged across a water flow adjacently to each other between bulkheads 16. The elevating device 14 is provided with a controller 14c, a piping 14d, an electromagnetic on-off valve, a water injection pump 14f, and a vacuum pump 14g. When a ship is needed to sail, the cable body 12 is first unfastened. Secondly, the water injection pump 14f is driven, water is fed in each floating body 10 through a piping, the floating body 10 is sunk, and a ship is sailed thereabove. After the ship passes, water is discharged from each floating body 10, and the floating body 10 is floated. When the floating bodies 10 are completely floated on a water surface, the gangway foot plates fixed on the floating bodies 30 are linked together and men and vehicles are run thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating bridge, and more particularly, to a floating bridge having a lifting function.

[0002]

2. Description of the Related Art As one type of bridge structure which is not subject to laws and regulations such as the Road Traffic Act, there is a so-called floating bridge which is installed over a lake or a river at a tourist spot. This type of floating bridge is usually
A plurality of floating bodies floating above the water surface are installed adjacent to the seawall, and the floating body is a floating structure where multiple floating bodies are locked and connected with a cable such as a wire spanning between the seawalls. It is mounted to secure traffic for people and small vehicles.

However, the conventional floating bridge having such a structure has the following technical problems.

[0004]

That is, for example, in the case of an emergency accident in a facility or the need to transport goods for the maintenance of the facility, it is necessary to secure the operation of the ship across the floating bridge. There is.

[0005] However, in the conventional floating bridge, in order to ensure the operation of the ship, the work of removing the floating bridge and the work of re-installing the floating bridge are required, so that there is a problem that labor and time are required each time.

[0006] The present invention has been made in view of such problems, and an object of the present invention is to provide a floating bridge that can easily secure the operation of a ship.

[0007]

In order to achieve the above object, according to the present invention, a plurality of watertight floating bodies floating above the water surface are installed adjacent to a seawall, and the space between the floating bodies is installed between the seawalls. In a floating bridge, which is connected and locked by a cable body, and a floating plate is placed on the floating body, water is poured into the floating body, the floating body is sunk below the water surface, and water in the floating body is drained. An elevating device is provided to float the. According to the floating bridge configured in this way, when water is injected into the floating body by the elevating device and the floating body is submerged, the ship can be operated on the water surface on the upper side thereof. Then, when the operation of the vessel is completed, the water in the floating body is discharged by the elevating device, and when the water is lifted, the function as the floating bridge is restored. The lifting device includes a flexible pipe connected to each of the floating bodies, a water injection pump and a drainage vacuum pump connected to one end of the pipe via an on-off valve, the on-off valve, the water injection pump, and a drainage pump. And a controller for controlling the operation of the vacuum pump.
According to this configuration, the on-off valve of the controller and the water injection pump,
By controlling the operation of the vacuum pump for drainage, the floating body can be settled or floated. The controller controls the drive of a winding device that performs winding and rewinding of the cord-like body based on a detection signal of a tension sensor disposed on the cord-like body, and controls a tension of the cord-like body. Can be controlled to be constant in a steady state, and the cable can be controlled to be relaxed when the floating body is sunk, and to be pulled when the floating body floats. . According to this configuration, since the tension of the cable body that connects and locks the plurality of floating bodies is kept constant in the steady state, the shape of the floating bridge can be stabilized, and that state can be maintained.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 to 5 show an embodiment of a floating bridge according to the present invention. The floating bridge shown in FIG. 1 includes a plurality of floating bodies 10, two cable bodies 12, an elevating device 14, and a connecting plate 30 provided on the floating bodies 10.

The floating body 10 is of a water-tight type whose periphery is closed, is formed in a rectangular hollow box shape, and has a partition wall provided with a communication hole therein, and is provided with a water flow ( 1 (indicated by an arrow in FIG. 1), they are arranged in a line so that the side surfaces in the short direction are orthogonal to each other, and are installed adjacent to the seawall 16 so as to cross the water flow.

A fender 18 having a buffering function and abutting against the revetment 16 is provided on the longitudinal end surfaces of the pair of floating bodies 10 provided on the facing revetment 16 side. In addition, the floating bodies 10 arranged in the intermediate portion are connected via a fitting jig 20 so as to be swingably movable in a horizontal plane.

The details of the fitting jig 20 are shown in FIGS. The fitting jig 20 shown in FIG.
A male fitting 20a protruding from a longitudinal end face of the floating body 10, a female fitting fitting 20b protruding from a longitudinal end face of the other floating body 10 installed adjacent thereto, and a connecting rod 20c. ing.

The male fitting fitting 20a is composed of four fittings having the same structure, and two fittings are arranged on the same vertical axis at predetermined intervals in the vertical direction along the end surface of the floating body 10. The remaining two sheets are arranged at predetermined intervals in the horizontal direction from the two sheets.

The female fitting portion 20b is made up of eight metal fittings having the same structure, and a pair of four metal fittings arranged vertically adjacent to each other.
The male fittings 20a are provided between the pairs at positions where they can be fitted.

The male and female fitting jigs 20a and 20b have insertion holes 20d,
The through hole 20e is formed, the through hole 20d is formed in a circular shape, and the through hole 20e is formed in an oval shape.

By inserting the connecting rods 20c into the insertion holes 20d and 20e, the floating bodies 10 are connected to each other so as to swing freely in a horizontal plane.

On the other hand, as shown in FIG. 5, a plurality of cable support fittings 22 are fixedly provided on the upper side of the lateral surface of each floating body 10. A cable insertion hole 24 is formed through each cable support fitting 22.

The cable body 12 is made of a wire rope, a steel wire, or the like, and is inserted into the insertion hole 24 of the cable support fitting 22 to be positioned upstream and downstream with respect to the water flow.
Articles are used.

One end of each cable body 12 is connected to one revetment 16
At an appropriate position. The lifting device 14 includes a pair of tension sensors 14a, a pair of winders 14b, a controller 14c, a pipe 14d, an electromagnetic on-off valve 14e, a water injection pump 14f, and a vacuum pump 14g.

The tension sensor 14a is composed of, for example, a load cell, is attached to each of the cords 12, and detects the tension of the cord 12 from the amount of distortion. A pair of winders 14
b is the winding drum 140b and the winding drum 14
0b is provided with a winch provided with a motor 141b for rotating and driving the other seawall 16a.
It is wound on a winding drum 140b installed above.

The pipe 14d is formed of a flexible hose, extends along the longitudinal direction of the floating bodies 10 arranged in a row, and communicates with the inside of each floating body 10. The solenoid on-off valve 14e is arranged at an end of the pipe 14d.

The water injection pump 14f is connected to a pipe 14d via an electromagnetic on-off valve 14e, and injects water to each floating body 10 via the pipe 14d when the electromagnetic on-off valve 14e is open. The vacuum pump 14g is connected to the pipe 14d via an electromagnetic on-off valve 14e, and discharges water from each floating body 10 via the pipe 14d when the electromagnetic on-off valve 14e is open.

The controller 14c is composed of, for example, a personal computer having a memory for storing control procedures and the like. The controller 14c receives a detection signal from the tension sensor 14a, and receives a motor 141b of the winder 14b, an electromagnetic on-off valve 14e, Control signals are sent to the water injection pump 14f and the vacuum pump 14g.

In a steady state, the controller 14c controls the tension of each cord 12 based on a tension detection signal from the tension sensor 14 so that the tension of each cord 12 is always constant.
By rotating the motor 141b of the winder 14b forward and backward, winding or rewinding of the cable body 12 is performed.

In this case, the tension value is set by, for example, determining the plane shape of the floating bridge in consideration of the flow of water, the amount of water, the traffic volume, etc. when the floating bridge is erected, and the rope required to maintain this shape. The tension of the body 12 is simulated, the obtained tension value is stored in the controller 14c, and control is performed so that this tension value is always maintained.

When such control is performed, the tension of the rope 12 for connecting and locking the plurality of floating bodies 10 constituting the floating bridge is always kept constant, so that the shape of the floating bridge is stabilized, and the state of the floating bridge becomes stable. Can be maintained.

When it becomes necessary to sail the ship across the floating bridge, first, a control signal is sent from the controller 14c to the motor 141b of the winder 14b to loosen each cable body 12. .

Next, the electromagnetic opening / closing valve 14e is opened, and the water injection pump 14f is driven to feed water into each floating body 10 through the pipe. In this case, the water for water injection is collected from a stream or stored in a water storage tank in advance.

When water is injected into the floating bodies 10, each of the floating bodies 10 gradually sinks. When all the floating bodies 10 are sunk to a predetermined depth, the water injection pump 14f is stopped and the electromagnetic on-off valve 14e is turned off.
Is closed. In such a state, the ship can pass above the buried floating body 10.

After the ship has passed, the controller 14
A control signal is sent from the control valve c to open the electromagnetic on-off valve 14e, drive the vacuum pump 14g, and discharge water from each floating body 10.

When the water in the floating body 10 is discharged, each floating body 1
0 gradually rises. At this time, a drive signal is sent from the controller 14c to the motor 141b to wind up each of the cords 12, and the floating body 10 can be lifted by the cooperation of the winding force and the drainage.

The fitting jig 20 interposed between the floating bodies 10 in the process of sinking and floating the floating body 10 is provided to stably sink or float the floating body 10. It is also possible to cause the floating body 10 to sink and float without interposing the intermediary 20.

When the floating body 10 completely floats on the water surface and the tension of the cable body 12 is maintained at a predetermined value, the connecting plate 30 fixed on each floating body 10 is connected, so that the traveling of a person or a vehicle is prevented. It becomes possible, and thereafter, the steady control is continued.

A member indicated by reference numeral 30 in FIGS. 1, 2 and 5 is a crossing plate mounted on the floating body 10 and provided between the revetment 16. Floating body 1
Since the “0” sinks and floats, the transition plate 30 is divided into a plurality of transition plate pieces 30 a and fixed on each floating body 10. In the present embodiment, the connecting portion of each crossover plate piece 30a is provided with a step in which the sinking side is downward.

In the floating bridge constructed as described above, when the water is poured into the floating body 10 by the elevating device 14 and is submerged, the ship can be operated on the water surface on the upper side thereof.

When the operation of the ship is completed, the water in the floating body 10 is discharged by the elevating device 14, and when the water is lifted, the function as the floating bridge is restored.

In the case of this embodiment, the lifting device 14
Is a flexible pipe 14d connected to each floating body 10,
A water injection pump 14f and a drainage vacuum pump 14g connected to one end of the pipe 14d via an electromagnetic on-off valve 14e,
The controller 14c controls the operation of the electromagnetic on-off valve 14e, the water injection pump 14f, and the vacuum pump 14g. Therefore, the operation of the controller 14c allows the floating body 10 to sink or float.

In the above-described embodiment, the case where all of the floating bodies 10 arranged in a row are submerged or floated is exemplified. However, the embodiment of the present invention is not limited to this. Only 10 can be submerged and floated.

In this case, a floating body to be submerged and floated,
What is necessary is just to remove the fitting jig 20 between the floating body which does not sink and float. Further, in the above-described embodiment, the case where the controller 14c controls to keep the tension of the cord body 12 constant is exemplified. However, if the floating body 10 is only settled and floated in order to secure the operation of the ship, Such control is not always necessary.

Further, the drainage vacuum pump 14g of the elevating device 14 is not necessarily required, and the floating body 10 can be injected and drained by controlling the rotation direction of the injection pump 14f to be normal or reverse. Further, the pair of floating bodies 10 installed close to the revetment 16 may be fixed by an anchor or the like.

[0040]

As described above in detail in the embodiments,
ADVANTAGE OF THE INVENTION According to the floating bridge which concerns on this invention, since submersion and floating of a floating body can be performed by an elevating device as needed, operation of a ship can be ensured easily.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a floating bridge according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an explanatory side view of a connection state between floating bodies in FIG. 1;

FIG. 4 is an explanatory plan view showing a connection state between floating bodies in FIG. 1;

FIG. 5 is a sectional view of a main part of the floating body of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Floating body 12 Cord body 14 Elevating device 14a Tension sensor 14b Winder 14c Controller 14d Piping 14e Solenoid on-off valve 14f Water injection pump 14g Vacuum pump 16 Seawall

Claims (3)

[Claims] 1. A plurality of watertight floating bodies floating on the water surface are installed adjacent to each other between seawalls, and the floating bodies are connected and locked between the seawalls by a cord extending between the seawalls, and a crossover board is mounted on the floating body. A floating bridge, comprising: a floating bridge provided with an elevating device that injects water into the floating body, sinks the floating body below the surface of the water, drains water in the floating body, and floats the floating body. 2. The lifting device, comprising: a flexible pipe connected to each of the floating bodies; a water injection pump and a drainage vacuum pump connected to one end of the pipe via an on-off valve; A floating bridge comprising a water injection pump and a controller for controlling operation of a drainage vacuum pump. 3. The controller controls the driving of a winding device that winds and rewinds the cord-like body based on a detection signal of a tension sensor disposed on the cord body. Along with controlling the tension of the cable body to be constant in a steady state, the cable body is relaxed when the floating body is laid down, and the cable body is pulled when the floating body is raised. The floating bridge according to claim 2, wherein the floating bridge is controlled.