JP2507519Y2 - River crossing bridge lifting and parapet notch opening and closing device - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] This invention is designed to simultaneously close a notch for a passage formed in a parapet when a bridge installed in this river is raised when the water flow increases in the river where the parapet is constructed. The present invention also relates to a parapet notch opening / closing device for lifting and lowering a river crossing bridge, wherein the notch can be opened when the bridge is lowered.

[0002]

2. Description of the Related Art Parapets (concrete retaining walls) having a height of about 1 m are constructed on both sides of a river in a river having a relatively shallow river bed in preparation for flooding. And when bridging to the river where the parapet is constructed in this way, it will be higher than the road surface due to the presence of the parapet,
It is practiced to form a notch in a part of the parapet at the position where the bridge is to be bridged and to build a bridge flush with the road here. In other words, the parapet was constructed excluding the part to be bridged.

In the very old days, the bridge was fixedly installed at the same height as the road surface. Therefore, if there is an increase in water due to a typhoon, etc., the bridge will be flooded or flooded from the cutout to the outside of the river such as the road surface, and the pressure of running water flowing through the river or various objects flowing such as driftwood will cause the bridge to overflow. There was some damage to the car, which was an undesirable result.

In order to partially solve these problems, the bridge is fixedly installed while a horizontal water stop plate for opening and closing the notch of the parapet is arranged parallel to the inside or outside of the parapet. It has been developed that the water cutout plate is used to open and close the notch so that the water does not overflow from this part to the outside of the river when the water level increases.

Further, the bridge is installed so that it can be moved up and down by any means, and the horizontal pull-out water stop plate is installed in parallel with the parapet to raise and lower the bridge, and the water stop plate is manually or It has been developed that the bridge is moved laterally by a means different from the lifting means so that the bridge can be retracted and the notch of the parapet can be closed when the water level increases.

[0006]

[Problems to be Solved by the Invention] However, in the former case, that is, when the bridge does not move up and down, although the notch of the parapet can be closed, since the bridge is fixedly installed, Since there are problems in the maintenance of the bridge, such as damage to the bridge during flooding,
There was no fundamental solution.

In order to solve this, the latter, that is, the one in which a bridge is installed so as to be able to move up and down has been developed. In this, the movement of a horizontal pull-out water stop plate for opening and closing the cutout is developed. It was difficult to synchronize the rise of the bridge with the rise of the bridge, and there was a tendency that either the rise of the bridge or the lateral movement of the water stop plate was delayed. Also, in this one, the one that used power for lateral movement of the water stop plate was different from the power used for lifting and lowering the bridge. In the end, three types of power were used because they were needed in the cutouts.

[0008]

Therefore, in order to solve the above-mentioned problems, the river crossing bridge lifting / parapet notch opening / closing device according to the present invention forms notches in a part of the parapets constructed on both sides of the river. A bridge that can be raised and lowered by a hydraulic jack or the like is installed across the river between the cutouts, and a water stop plate that can close the cutouts is arranged below the bridge.

[0009]

Operation: That is, as the bridge moves up and down, the water stop plate also moves up and down with the same power, and the notch can be opened and closed at the same time as the bridge is lifted.

[0010]

[Embodiment] Next, an embodiment of a device for lifting and lowering a river crossing bridge and a parapet notch opening / closing device according to the present invention will be described with reference to the drawings. 1 is a river, and 2 are parapets constructed on both sides of the river 1. is there. The parapet 2 is formed with a cutout 3 in a bridge portion, and the cutout 3 communicates with a road outside the parapet 2 of the river 1.

Reference numeral 4 denotes a bridge installed so as to cross the river 1 between the cutouts 3. The four fours of the bridge 4 are piston rods 6 of a hydraulic jack 5 arranged below them in a substantially vertical state. Connected to.

Reference numeral 7 denotes a water stop plate arranged so as to hang down from both ends of the bridge 4, and the water stop plate 7 is formed by arranging a watertight packing 8 and the like. The water plate 7 has an area larger than the frontage of the cutout portion 3 and is formed in a size capable of closing the cutout portion 3.

However, in normal times, that is, when the river is not filled with water, the hydraulic jack 5 is operated to lower the bridge 4 and keep it at the same height as the road. This allows the bridge 4 to function as a normal bridge.

On the other hand, when the river is filled with water, the hydraulic jack 5 is operated to raise the bridge 4 so as to lift it. When the bridge 4 rises in this manner, the water stop plates 7 arranged below both ends of the bridge 4 are also pulled up. Then, when the rise is stopped at the time of reaching the required height, the notch 3 formed in the parapet 2 is closed by the water stop plate 7 at that time. Therefore, the water flowing through the river will not overflow from the notch 3 to the outside, and the bridge 4 will not be flooded.

It should be noted that the increased water usually decreases in a few hours, but since the bridge 4 is at a high position during this time, it cannot pass through the bridge 4. This is the same as in the past, however, if it is necessary to pass by, if a simple ladder or a simple stair is detachably set on the water stop plate 7, the passage becomes possible.

[0016]

As described above, according to the river crossing bridge lifting / parapet notch opening / closing device of the present invention, notches are formed in a part of the parapets constructed on both sides of the river, and hydraulic pressure is provided between the notches. A bridge that can be moved up and down by a jack etc. is installed across the river, and a water stop plate that can close the notch is placed at the bottom of the bridge. The plate also moves up and down with the same power, and has the effect that the notch can be opened and closed at the same time as the bridge is raised and lowered.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a device for opening / closing a river crossing bridge and opening / closing a parapet notch according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged cross-sectional view of a main part of a parapet notch opening / closing device for lifting and lowering a river crossing bridge according to the present invention.

[Explanation of symbols]

 1 River 2 Parapet 3 Notch 4 Bridge 5 Hydraulic jack 6 Piston rod 7 Water stop plate 8 Watertight packing

Claims (1)

(57) [Scope of utility model registration request] 1. A notch is formed in a part of the parapets constructed on both sides of the river, and a bridge that can be raised and lowered by a hydraulic jack or the like is installed across the river between the notches,
A river crossing bridge lifting / parapet notch opening / closing device, characterized in that a water stop plate capable of closing the notch is disposed below the bridge.