JPH11172620A - Floating body bridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floating body bridge capable of holding a bridge in a fixed position irrespective of an up-and down motion on the surface of the water. SOLUTION: For the motion of the sea level 1 with rise and fall of the tide, when the sea level 1 rises by rise of the tide, a water supply pump 10 is driven to supply sea water inside a floating body 2 through a water supply pipe 7, and the floating body 2 is settled. When the sea level 1 falls by fall of the tide, a drain pump 12 is driven to discharge sea water 21 in the floating body 2 to the outside of the floating body 2 through a drainage pipe 8 to float the floating body 2, and a vertical distance of a bridge 4 to a quaywall 6 is maintained in constant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating bridge having an automatic water level adjusting function.

[0002]

2. Description of the Related Art Conventionally, a floating bridge in which a bridge girder is mounted on a pier standing on a so-called floating tank floating on the sea surface as a bridge over the sea or the like is known. FIG. 2 shows an example of such a floating bridge, in which piers 3 are respectively provided upright on a plurality of floating bodies 2 floating on the sea surface 1.
A bridge section 4 is installed on the top, and both ends of the bridge section 4 are connected to a quay 6 by a ramp way 5,
In response to the vertical movement of the sea surface 1 due to the ebb and flow of the tide, the entire floating bridge is moved up and down.

[0003]

However, according to the floating bridge constructed as described above, for example, the tide of the sea rises and falls, and the bridge 4
When the vertical movement of the bridge 4 becomes large, the slope of the ramp way 5 connecting both ends of the bridge 4 and the quay 6 becomes large, and there is a problem that traffic between the quay 6 and the bridge 4 becomes impossible. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a floating bridge that can maintain a bridge at a constant height even when the water surface moves up and down.

[0004]

According to the first aspect of the present invention,
A bridge is placed on a pier standing on a hollow floating body floating on the water surface, and liquid is supplied to and discharged from the floating body in a floating bridge in which the ends of the bridge are arranged at a predetermined distance from the quay wall. Supply / discharge means, distance measuring means for measuring the vertical distance of the bridge with respect to the quay, and vertical distance of the bridge with respect to the quay according to the measurement result of the distance measuring means. And control means for controlling the supply and discharge of the liquid into and from the floating body by the supply and discharge means.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a floating bridge to which an embodiment of the present invention is applied.
The same reference numerals are given to the same parts.

In this case, the floating body 2 floating on the sea surface 1 is formed of a hollow tank. And this floating body 2
A water supply pipe 7 and a drainage pipe 8 are provided. The water supply pipe 7 connects the inside of the floating body 2 and the sea under the sea surface 1, and is provided with a water supply electric valve 9 and a water supply pump 10 in the middle of the water supply pipe 7. By opening the electric valve 9 and driving the water supply pump 10, seawater is supplied into the floating body 2 via the water supply pipe 7, and the floating body 2 is settled.

[0007] The drainage pipe 8 connects the seawater 21 inside the floating body 2 and the surface of the sea 1, and a drainage electric valve 11 and a drainage pump 12 are arranged in the middle thereof.
By opening the electric drain valve 11 and driving the drain pump 12 in response to a drain command from the control device 15 described later, the seawater 21 inside the floating body 2 is discharged to the outside of the floating body 2 through the drain pipe 8 by the drain pipe 8. 2 is raised.

On the other hand, an ultrasonic sensor 13 is provided at one end of the bridge portion 4 as a distance measuring sensor, and a reflecting plate 14 is arranged on the quay 6 so as to face the ultrasonic sensor 13. The ultrasonic sensor 13 transmits an ultrasonic wave to the reflector 14 on the quay 6 side, receives an ultrasonic wave reflected from the reflector 14, and sets a distance between the ultrasonic sensor 13 and the reflector 14. That is, the vertical distance of the bridge 4 from the quay 6 is measured.

[0009] The length measurement result of the ultrasonic sensor 13 is input to the control device 15. The control device 15 is provided inside the pier 3 provided upright on the floating body 2 so that the vertical distance of the bridge 4 to the quay 6 becomes constant according to the length measurement result of the ultrasonic sensor 13. In other words, the water supply electric valve 9, the water supply pump 10, and the drainage electric valve 11
In addition, the operation of the drainage pump 12 is controlled.

In the drawings, reference numeral 16 denotes a hinge for rotatably instructing the rampway 5 to the end of the bridge portion 4, and 17 denotes a floating body 2.
This is an air vent to supply and exhaust air inside. next,
The operation of the embodiment configured as described above will be described.

In this case, the ultrasonic sensor 13 constantly measures the vertical distance of the bridge 4 from the quay 6. In this state, if the sea surface 1 is now rising due to the rising tide and the ultrasonic sensor 13 detects that the vertical distance of the bridge 4 with respect to the quay 6 has increased, a water supply command is issued from the control device 15. The water supply electric valve 9 is opened, the water supply pump 10 is driven, and seawater is supplied into the floating body 2 via the water supply pipe 7. As a result, the floating body 2 sinks as much as the sea level 1 rises due to the rising tide, and the vertical distance of the bridge 4 from the quay 6 is maintained constant.

[0012] In addition, when it is lowered by ebb,
When the ultrasonic sensor 13 detects that the vertical distance of the bridge 4 from the quay 6 is small, the control device 1
5, a water supply command is issued, the drainage electric valve 11 is opened, the drainage pump 12 is driven, and the seawater 21 inside the floating body 2 is discharged to the outside of the floating body 2 via the drainage pipe 8. As a result, the floating body 2 is placed on the sea surface 1 due to ebb tide.
Is lowered, and the vertical distance of the bridge 4 to the quay 6 is kept constant.

Accordingly, even if the tide rises and falls and the vertical movement of the bridge part 4 becomes large due to the movement of the sea surface 1 in this manner, the sea surface 1
Rises, the floating body 2 sinks, and the sea surface 1
Is lowered, the floating body 2 is raised, so that the vertical distance of the bridge 4 with respect to the quay 6 can be maintained constant, and the bridge 4 can be maintained at a constant height. 6 can be kept constant at all times, which allows the quay 6
Safe traffic can be ensured without hindering traffic between the vehicle and the bridge 4.

In the above embodiment, the bridge 4
The supply and discharge of seawater to the inside of the floating body 2 consisting of a hollow tank is controlled in accordance with the distance between the seawater and the quay 6. The supply and discharge of the liquid to and from the floating body 2 may be controlled according to the vertical movement. In this case, it goes without saying that equipment for supplying and discharging the liquid is required.

[0015]

As described above, according to the present invention, the vertical distance of the bridge from the quay can be kept constant even if the sea surface moves up and down in response to the tide. Safe traffic can be ensured without hindering traffic between the quay and the bridge.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing a schematic configuration of a conventional floating bridge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sea surface, 2 ... Floating body, 21 ... Seawater, 3 ... Bridge pier, 4 ... Bridge part, 5 ... Rampway, 6 ... Wharf, 7 ... Water supply pipe, 8 ... Drainage pipe, 9 ... Electric water supply valve, 10 ... water supply pump, 11 ... electric drainage valve, 12 ... drainage pump, 13 ... ultrasonic sensor, 14 ... reflector, 15 ... control device, 16 ... hinge, 17 ... air release.

Claims (1)

[Claims] 1. A floating bridge in which a bridge is mounted on a pier standing upright on a hollow floating body floating on the water surface and an end of the bridge is arranged at a predetermined distance from a quay, wherein a liquid flowing into the floating body is provided. Supply / discharge means for supplying / discharging air; distance measuring means for measuring a vertical distance of the bridge with respect to the quay; vertical distance of the bridge with respect to the quay according to the measurement result of the distance measuring means Control means for controlling the supply and discharge of the liquid into and from the floating body by the supply / discharge means so as to maintain a constant value.