JPS6198811A - Sub-gate - Google Patents

Abstract

PURPOSE:To raise a main gate and to enable to perform its maintenance, by a method wherein eye plates at both ends of a flexible net are respectively hooked with anchors at piers, and a gate body made of rubber in the flexible net is filled with water to close a channel. CONSTITUTION:A sub-gate comprises a flexible net 6, and a gate body 11 made of rubber. The flexible net 6 comprises a pair of upper and lower wire rope 7, a number of cloth bands 8 secured to the wire ropes 7, and eyeplates 9 secured to the ends of the wire rope 7. The gate body 11 made of rubber is supported to cloth bands 8 of the net 6, and both ends 11A are brought into contact with the upper stream sides of piers 2. The eye plates 9 are hooked with their respective anchor rods 10 at piers 2, and a channel between the piers 2 is closed by filling the interior of the gate body 11 made of rubber with water. Further, a gate 1 is raised to perform maintenance.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a preliminary gate provided at an estuary weir or the like.

2. Description of the Related Art Conventionally, when performing maintenance on the main gate (1) of an estuary weir as shown in Figs. 7 and 8, a plurality of intermediate gates (2) are used between the piers (2).
3) are erected at appropriate intervals, and then the intermediate doorstops (3) are erected at appropriate intervals.
) and between the intermediate door stop (3) at both ends and the pier (2), a preliminary gate panel (4) is provided to close the waterway between the piers (2).

Problems to be Solved by the Invention According to the above conventional configuration, a large number of steel springs /l/ (4)
sb, which is expensive and requires relatively large reserve gate storage facilities. Additionally, installing a spare gate requires heavy machinery, which is laborious and time-consuming. Furthermore, it is difficult to convert it to other estuary weirs.

Therefore, the present invention provides a spare gate that solves these problems.

Means for Solving the Problem In order to solve the above problem, the preliminary gate of the present invention has a flexible net that spans between both piers such as an estuary weir, and a flexible net that is supported by the net and that allows water to flow inside. It consists of a rubber gate body that closes the waterway between both piers when filled and inflated.

Function In the above structure, first, the gate body and the net, which are folded and stored, are stretched out and passed between the piers, and both ends of the nets 7) are fixed to the piers.

Next, water is injected into the gate body to inflate the gate body. Then, the gate body comes into close contact with the bottom surface of the channel between the vias due to its own weight, and both ends of the gate body are brought into close contact with the piers due to the water pressure, thereby closing the channel between the piers.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 5. (6) is a flexible cable 7), which includes a pair of upper and lower wire ropes (7), which are arranged at appropriate intervals along the wire ropes (7), and whose ends are attached to both wire ropes (7). a number of cloth bands (8) fixed to the wire ropes (8) and eye plates (9
), and the length of each cloth band (8) is longer as it is closer to the center. αQ is an anchor rod installed on the side surface of the pier (2), and is engaged with the hole in the eye plate (9). Ql) is supported by the cloth band (8) of the net (6) and both ends (1
1A) is a rubber gate body that is brought into contact with the upstream end of the pier (2), and has a water supply port @ with an on-off valve and a drain port αJ with an on-off valve. When the gate main body Qυ is filled with water and expanded, the cross section of the central part becomes the second
As shown in the figure, it is formed into a perfect circle, and the width of the cross section decreases as it approaches both ends from the center, forming an oval shape (see Figure 3). However, the height of the gate body αη is constant. In addition, in order to maintain the maximum strength of the wire rope (7) and the gate body (11), their deflection (hl) should be set to 1/8 to 1/8 of the distance (f) between the piers (2).
It is set to 12.

Hereinafter, the effects of the above configuration will be explained.

First, the gate body (6) 2 and the net (6), which are folded and stored, are pulled out, stretched out in a straight line, and passed between the piers (2) as shown by the imaginary lines in FIG. Next, the gate body αη and the net (6) are submerged in water to the upstream side of the pier (2), and the hole of the eye plate (9) is engaged with the anchor rod αQ. Next, the water supply pump fills water into the gate body αυ from the water supply port @, and expands the gate body αυ (using the water pressure of river water, the gate body α
η may be expanded). Then, the gate base Ql) comes into close contact with the bottom of the waterway between the pier (2) due to its own weight, and its both ends (11A) are brought into close contact with the upstream end of the pier (2) by the water pressure of the river water, and the pier (2) The waterway between them is blocked. Raise the main gate (1) to the ash, and this main gate (1
) should be maintained.

Next, when storing the spare gate, lower the main gate (1) to block the waterway, then drain the water inside the gate body QlJ from the drain port a4, and attach the eye plate (9) to the anchor rod αO. from the gate body αυ and the net (
6) should be raised.

When the distance between the upstream end of the pier (2) and the main gate (1) is narrow and the wire rope (7) cannot be bent sufficiently, the upstream end of the pier (2) is All you need to do is to protrude the cap α4 made of aluminum or concrete and pass the wire rope (7) between the characters 199 (
Other Examples).

Effects of the Invention As described above, the present invention consists of a flexible net and a rubber gate body. It is cheaper than the spare gate made by No. 4, and since it can be folded and stored, a small storage facility is required. Furthermore, since it is relatively light and heavy, installation does not require heavy machinery and is time-consuming and labor-intensive. Furthermore, it can also be used for other estuary weirs with similar via spacing.

[Brief explanation of the drawing]

1 to 5 show one embodiment of the present invention, FIG. 1 is a plan view, FIG. 2 is a view taken along the arrow 1-1 in FIG. 1, and FIG. 3 is taken as seen from the Ll arrow in FIG. FIG. 4 is a view taken along the line ■--■ in FIG. 1, and FIG. 5 is a view taken along the line v--■ in FIG. 4. FIG. 6 shows a plane [Tf'] of the main part showing another embodiment of the present invention.
Illustrated. FIG. 7 is a front view showing a conventional example, and FIG. 8 is a cross-sectional view of the same.

Claims (1)

[Claims] 1. A flexible net that is stretched between two piers such as an estuary weir, and a rubber gate body that is supported by the net and blocks the waterway between the two piers when the inside is filled with water and expanded. A spare gate characterized by comprising: