JPH0738209U - River crossing bridge lifting and parapet notch opening and closing device - Google Patents

Abstract

(57) [Summary] [Purpose] When the bridge installed in the river is raised during flooding, the notches for passages formed in the parapet are closed at the same time, and when the bridge is lowered. Allow the notch to be opened. [Structure] A notch 3 is formed in a part of the parapet 2 constructed on both sides of the river 1, and a bridge 4 which can be raised and lowered by a hydraulic jack 5 and the like is installed between the notches so that the bridge 4 crosses the river. A water blocking plate 7 capable of closing the cutout is disposed in the lower portion, and the water blocking plate is moved up and down by the same power as the bridge moves up and down, and the cutout is opened and closed at the same time as the bridge is moved up and down. be able to.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 When the bridge installed in this river is raised during flooding in the river where the parapet is constructed, the notch for the passage formed in the parapet is closed at the same time, and the bridge is lowered. The present invention relates to a parapet notch opening / closing device for lifting and lowering a river crossing bridge, which is capable of opening the notch when opened.

[0002]

[Prior art]

 For rivers with a relatively shallow riverbed, parapets (concrete retaining walls) with a height of approximately 1 m are constructed on both sides of the river in preparation for flooding. When bridges are constructed in this way, the presence of parapets raises the position higher than the road surface.Therefore, a notch is formed in a part of the parapet at the bridge position, where a bridge flush with the road surface is formed. It is being built. In other words, the parapet was constructed excluding the part that should be bridged.

And very old, 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 due to the pressure of running water flowing through the river or various objects flowing such as driftwood, The bridge was damaged, which was not desirable.

In order to partially solve these problems, the bridge is fixedly installed, and a horizontal water stop plate for opening and closing the cutout portion of the parapet is arranged parallel to the inside or outside of the parapet. It was developed in such a way that the cut-out plate was opened and closed by this water stop plate so that it would not overflow outside the river from this part when the water level increased.

Further, the bridge is installed so that it can be moved up and down by any means, and the horizontal water stop plate as described above is installed in parallel with the parapet to raise and lower the bridge and to manually operate the water stop plate. Alternatively, a method has been developed in which the bridge is laterally moved by a means different from the lifting means of the bridge 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 device]

 However, in the former case, that is, when the bridge does not move up and down, the notch of the parapet can be closed, but the bridge is fixedly installed, which may cause damage to the bridge during flooding. However, there was a problem in the maintenance of the bridge, so the fundamental solution was not reached.

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 part was developed. It was difficult to synchronize the ascent of the bridge and the ascent of the bridge, and either the ascent of the bridge or the lateral movement of the water stop plate tended to be delayed. Also, in this case, the one that used power for lateral movement of the water stop plate was different from the power used for raising and lowering the bridge, and whether the water stop plates face each other or not. In the end, three types of power were used because they were needed in the cutouts.

[0008]

[Means for Solving the Problems]

 Therefore, in order to solve the above-mentioned problem, the river crossing bridge lifting and parapet notch opening / closing device according to the present invention forms a notch in a part of the parapet constructed on both sides of the river, and a hydraulic jack is provided between the notches. A bridge that can be moved up and down by such means is installed across the river, and a water stop plate that can close the notch is placed below the bridge.

[0009]

[Action]

 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 moved up and down.

[0010]

【Example】

 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. A cutout 3 is formed in the bridge portion of the parapet 2, and the cutout 3 communicates with a road outside the parapet 2 of the river 1.

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

Reference numeral 7 denotes a water blocking plate arranged so as to hang down from both ends of the bridge 4, and the water blocking 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 flooded, the hydraulic jack 5 is operated to lower the bridge 4 and keep it at the same height as the road. This makes this bridge 4 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 way, the water stop plates 7 arranged below both ends of the bridge 4 are also pulled up. When the ascent 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 in 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]

[Effect of device]

 As described above, according to the river crossing bridge lifting / parapet notch opening / closing device according to the present invention, notches are formed in a part of the parapets constructed on both sides of the river, and a hydraulic jack or the like is used to raise or lower between the notches. A flexible bridge is installed across the river, and a water stop plate that can close the cutouts is placed at the bottom of the bridge. It has the effect that it can be moved up and down by the same power and 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 the 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)

[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.