JPS5933733B2 - rubber dam - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rubber weir installed across a river or the like that rises and falls in response to the supply and discharge of fluids such as air and water.

BACKGROUND ART Conventionally, rubber dams have been known, which are made by making a rubber bag airtight and are used as dams to take in agricultural water, sea walls at high tides, seawater dams at river mouths, and the like.

Such rubber weirs have many practical advantages such as ease of installation and maintenance, and have become particularly widely used in recent years in place of iron automatic overturning weirs.

Such a rubber weir is usually formed by forming a rubber sheet into a bag-like body, and its specific gravity is about 1.2 to 1.3.

However, when a rubber weir that has been erected by filling with fluid is toppled, the pulp is released into the atmosphere or forced out using a vacuum, but as a result, the sheet of the rubber weir has no effect on lightning conduction to promote the lodging. Instead, they simply wait for the rubber dam to be crushed by water pressure, which has the disadvantage that it takes a long time to complete the process.

The present invention aims to eliminate the above-mentioned drawbacks and provide a new rubber weir which can be expected to have a short lodging time and complete lodging. A rubber weir consisting of a mounting part fixed to a riverbed and both riverbank slopes so as to cross a river, etc., on the side opposite to the enclosed fluid outlet mounting position communicating with the bulging part on one of the riverbank slopes. The rubber weir is characterized in that a weight is provided on the outer surface of the rubber weir swelling part.

The invention will now be explained with reference to the drawings.

In FIG. 1, 1' indicates the rubber weir body reinforced with canvas 2 or the like.

The rubber weir body 1' consists of a swollen part 1a' which becomes tubular by filling a fluid such as air or water, and a plate-like part 1b' integrally provided along the longitudinal direction on one side of the swollen part 1a'.

In order to form the rubber weir body 1' shown in FIG. 1, for example, two sheets of raw raw rubber are placed one on top of the other on a hot surface plate of a molding plate, and the intermediate region between the raw raw rubber sheets is placed along the longitudinal direction. A release material is interposed in the area defining the bulge,
It may be integrally press-molded at the vulcanization temperature of the raw rubber sheet.

At this time, a desired reinforcing layer can be obtained by appropriately embedding the rubberized canvas 2 or the like between the raw rubber sheets.

Note that the rubber weir shown in FIG. 1 is a preferred example of the present invention, and the present invention is not limited thereto.

For example, it may be formed into a bag shape from a conventionally widely used sheet-like body.

The present invention will be described below with respect to a rubber weir shown in FIG.

First, in order to fix the illustrated rubber weir body 1' to the river bed 3, anchor bolts 4 are buried in the river bed 3Vc in advance as shown in FIG.
is positioned on the upstream side, and an anchor bolt 4 is inserted into a through hole (not shown) provided in the plate-like portion 1b', and the abutment plate 5 is fixed with a butt nut 6.

Also, it is fixed to both river bank slopes in the same manner as above.

According to the present invention, as shown in FIG. 3, the rubber is fixed to the riverbed 3 only on the side opposite to the mounting position of the enclosed fluid outlet communicating with the bulging part 1a' of the rubber weir 1 on one riverbank slope. A weight 7 is attached to the outer surface of the expanded portion 1a' of the weir 1.

The weight 7 may be mounted at any position on the outer surface of the bulge away from the riverbed when the rubber dam is erected, and the weight 7 may be any metal piece such as lead with a specific gravity greater than 1.

In the illustrated example, several weights T are attached to the tongue portion 8 of the distended portion 1a' at the most downstream end in the collapsed state only on the side facing the outlet mounting position (not shown). They are fixed with bolts and nuts at appropriate intervals in the direction.

FIG. 3 shows a state in which air or a fluid such as water is sealed in the expanded portion 1a' of the weighted rubber weir 1 having the above-described structure to form a weir.

As shown in the illustrated example, the rubber dam 1 is configured to be in a normal upright state for sealing fluid.

Next, a case will be described in which the rubber weir 1 that has been erected as shown in FIG. 3 is brought down.

The valve b of the discharge conduit 9 leading to the swollen portion 1a' of the rubber dam 1 shown in FIG. 4 is opened to begin discharging the sealed fluid.

As a result, the Shigomu weir 1 is opened due to the influence of water pressure, but only on the side facing the outlet installation position of the discharge conduit 9 is the swollen part 1a', that is, in FIG. A to show
Due to the influence of the weight 7 attached only to a part of the tongue piece 8 of the section, the rubber weir 1 is quickly and forcibly lowered from the area where the weight is attached than in the conventional type, until it is completely collapsed. The time required for this is significantly reduced.

FIGS. 5 and 6 show the state in which the rubber weir 1, which has been erected due to fluid sealing as shown in FIG. 4, lies down when the fluid is discharged.

Select by opening valve b provided in the discharge conduit 9.
The rubber weir 1 starts to fall down, and in this case, as shown in FIG. 5, the rubber weir starts to fall down from the part A where the weight 7 is present.

The rubber weir 1, which has begun to collapse from the A section, gradually collapses toward the discharge conduit 9 as shown in FIG.

In the illustrated example, the sealed fluid is pushed out sequentially toward the blade side, so if the discharge conduit is placed on the side opposite to part A, the discharge port will not be blocked due to the collapse of the rubber dam, and the rubber This method has the advantage that the weir can be completely collapsed without abnormally collapsing, eliminating the need for river bed piping equipment, and making construction easier.

7 and 8 show an example in which a chain 10 is used as a weight, and the chain 10 is placed on the bulge on the opposite side of the riverbed 3.

9 and 10 show an example in which a plate-like body 11 having high rigidity and high specific gravity, such as an iron plate or hard rubber, is attached as a weight to the tongue portion 8 using bolts and nuts so as to project therefrom.

In this case, the plate-like bodies 11 are attached to the lower side of the tongue part 8 at appropriate intervals in the longitudinal direction, and the end part attached to the tongue part is L-shaped so that the plate-like body 11 does not face downward when the rubber dam is erected. bend.

It is sufficient that this bent portion does not protrude from the river bed when the rubber weir is collapsed, as shown in FIG.

Since the L-shaped plate-like body 11 also functions as a drain for the water stopped at the dam when the rubber dam is erected, it eliminates the influence of vibration caused by the water flow when the dam is formed, prevents cracks caused by rubber fatigue, and improves the structure of the rubber dam. Durability can be further improved.

FIG. 11 shows an example in which a semi-flexible band 12 of high specific gravity, such as an iron plate or hard rubber, is used as a weight and is placed on the bulging part of a rubber weir and fixed to the attachment part of the riverbed. .

When the rubber weir is erected and inflated, in order to improve the bending performance of the strip 12, it is desirable to make the thickness of the portion A of the strip 12 thinner than the thickness of the mouth portion.

In addition to fixing the weight to the rubber weir body later with bolts, etc. as in the above embodiment, the weight can be attached by integrally molding a metal plate or powdered hull into the rubber in advance at a certain position. It is also possible to do so.

According to the rubber weir of the present invention as described above, by providing a weight on the outer surface of the bulging part of the rubber weir only on the side opposite to the mounting position of the discharge port of the sealed fluid, the time required for lodging the rubber weir can be reduced. It has outstanding advantages such as being able to shorten the length significantly and quickly responding to sudden increases in water on the upstream side.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of the rubber weir body of the present invention, and FIG.
The figure is a sectional view showing the state in which the rubber weir main body shown in Fig. 1 is attached to the river bed, Fig. 3 is a perspective view showing the state in which the rubber weir of the present invention is inflated, and Figs. FIGS. 7 to 11 are explanatory diagrams showing the state of collapse of the rubber dam of the invention over time, and FIGS. 7 to 11 are explanatory diagrams showing other embodiments of the rubber dam of the invention. 1...Rubber weir, 1'...Rubber weir body,
2...Canvas, 3...Riverbed, 4...
...Anchor bolt, 5...Abutment plate, 6...
... Nut, 7 ... Weight, 8 ... Tongue piece, 9 ... Discharge conduit.

Claims (1)

[Claims] 1. In a rubber weir consisting of a swollen part that becomes multi-tubular by sealing fluid, and a mounting part that fixes the swollen part to the riverbed and both riverbank slopes so as to cross the river, etc., one of the riverbank slopes A rubber weir, characterized in that a weight is provided on the outer surface of the rubber weir swollen part only on the side facing the mounting position of the discharge port for the sealed fluid communicating with the swollen part.