JPS627692Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a flexible membrane weir, commonly called a rubber weir, which is installed across rivers and the like for the purpose of intake of agricultural water.

Rubber weirs, which expand, rise, and contract when fluids such as air and water are introduced and discharged, are easy to construct and inexpensive, and are widely used for agricultural water intake.

However, when the rubber weir contracts and collapses, the boulders, etc. rolling on the river bed roll on the upper surface of the rubber weir that has contracted and collapsed, and the contracted and collapsed rubber weir is strongly attacked between it and the river bed concrete below the rubber weir. The rubber dam was damaged.

Also, even when the rubber weir expands and stands up, stones with relatively small specific gravity may cross over the rubber weir along with the overflowing water flow. The flowing water rolls upstream from the tip of the rubber weir a, and as shown in Fig. 2, when the rubber weir contracts and collapses, the boulders d are sandwiched between the riverbed concrete c and the outer surface of the downstream piece b of the rubber weir a. On rare occasions, the lower surface, which is the outer surface of the downstream piece b of the rubber weir a, was damaged by the pressure of water and rolling stones rolling on the upper surface of the rubber weir a.

In order to eliminate the above-mentioned drawbacks, as shown in FIG.
Some had a .

However, as shown in Figure 4, the sponge had the disadvantage that it was crushed by the water pressure during contraction and lodging, resulting in a loss of cushioning properties, and that its quality deteriorated and the cushioning properties were lost after long-term use. .

Furthermore, in the case where the flexible material e is provided on the outer surface, it immediately contains water, so the buffering properties differ between the areas that contain water and those that do not, and cannot be maintained uniformly. As the expansion and standing up and contraction and collapse were repeated, the moisture contained in the air was pseudo-contracted due to the temperature difference, and the buffering properties could not be maintained constant as described above due to the water content. Moreover, in the case where the inner surface is provided with the flexible material e, it is extremely difficult to remove the moisture.

The present invention relates to an improvement of a flexible membrane weir that eliminates such inconveniences, and is applicable to flexible membrane weirs that are laid across rivers, etc., and expand and rise when gas is filled in, and contract and collapse when discharged. The flexible membrane weir is characterized by having at least one bag containing a liquid at the bottom, and its purpose is to prevent damage even if it is installed in a place where there are many boulders.
The object of the present invention is to provide a flexible membrane weir which has a simple structure and has a constant cushioning performance over a long period of time.

As mentioned above, in the present invention, in a flexible membrane weir that is laid across a river, etc., expands and stands up when gas is filled in, and contracts and collapses when discharged, liquid is sealed at the bottom of the flexible membrane weir. Since the flexible membrane weir has at least one bag body, when the flexible membrane weir contracts and falls down, the boulders rolling on the river bed contract and fall over and roll on the upper surface of the stacked flexible membrane weirs, causing contact with the river bed concrete. Even if the flexible membrane weir is attacked between the two, the liquid-filled bag body absorbs the shock and can prevent damage to the outer surface of the upstream part of the flexible membrane weir.

Furthermore, even if foreign objects such as boulders are present between the riverbed, etc. and the outer surface of the downstream part of the flexible membrane weir when the flexible membrane weir contracts and collapses, the liquid-filled bag body Damage to the outer surface of the downstream piece of the flexible membrane weir can be prevented.

Furthermore, in the present invention, since a liquid such as water is filled in as a cushioning material, the cushioning material itself will not be crushed by water pressure, nor will it change in quality and lose its cushioning properties after long-term use.

Moreover, in this invention, the liquid is uniformly spread in the bag of the flexible membrane weir by its own fluidity and external pressure at the same time as the contraction and lodging. It can effectively absorb energy and prevent damage to the outer surface of the flexible membrane weir.

An embodiment of the present invention illustrated in FIGS. 5 to 7 will be described below.

In Fig. 5, reference numeral 1 denotes a rubber weir, which is a type of flexible membrane weir.The rubber weir 1 is made by impregnating raw rubber into a reinforcing layer made of a belt-like woven fabric or fiber cord made of cotton, synthetic fiber, etc. The main component is a vulcanized rubber band sheet.

The upstream piece 2, the downstream piece 3, and the intermediate piece 4 of the rubber dam 1 are integrally joined to each other via one side edge and formed into a protrusion 5, and the expansion of the rubber dam 1 The protrusions 5 have the function of separating the water flow that overflows the rubber weir 1 from the surface of the rubber weir 1 in an upwardly directed direction when the rubber weir 1 is erected.

With the overlapping side edges 6 of the rubber weir 1 located upstream and the protrusions 5 downstream, the riverbed concrete 7
The rubber weir 1 is stretched across the top surface 8 of the rubber weir 1 and the slope (not shown) adjacent to both banks of the river, and a presser foot 9 is applied over the entire length of the upper surface of the overlapped side edge 6 of the rubber weir 1, and the river bed is The rubber dam 1, the overlapping side edge 6, and the presser foot 9 are penetrated by the anchor bolt 10 planted in the concrete 7, and the nut 11 is screwed into the anchor bolt 10 and tightened. As shown in FIG. 6, air is sealed between the upstream section 2 and the intermediate section 4 when the device is inflated and raised, and is deflated and collapsed by being discharged. Further, an appropriate amount of water 12 is sealed between the intermediate piece 4 and the downstream piece 3.

Since the embodiment shown in FIGS. 5 and 6 is constructed as described above, when the rubber weir 1 expands and stands up, the stones 13 that flow down together with the water flow that overflowed the rubber weir 1 are the same. Due to the excessive flow of water, the water stagnates on the river bed concrete top surface 8 directly below the protrusion 5 of the expanding upright rubber weir 1, and as shown in FIG. Even if the downstream piece 3 is located, it is buffered by the water 12 sealed in the intermediate piece 4 and the downstream piece 3, so that damage to the outer surface of the downstream piece 3 of the rubber weir 1 is prevented. It can be prevented.

Furthermore, in this embodiment, even if a boulder rolling on the river bed rolls on the upper surface of the upstream section 2, it is protected by the buffering effect of the water 12 sealed between the downstream section 3 and the intermediate section 4. Damage to the outer surface of the upstream piece 2 can be prevented.

Furthermore, in this example, water 12 is used as a buffer material.
Because the cushioning material itself is encapsulated, it will not be crushed by water pressure, and will not change in quality and lose its cushioning properties after long-term use.Moreover, at the same time as it shrinks and collapses, the water 12 will absorb its own fluidity. Because it is uniformly diffused between the downstream part 3 and the intermediate part 4 due to external pressure,
It has a certain level of cushioning properties in all parts, and can effectively absorb the energy of rolling stones and prevent damage to the outer surface of the rubber dam.

Furthermore, the present invention does not require any special structure for providing a buffering effect, and the purpose can be achieved simply by interposing the intermediate piece 4, resulting in a very low cost.

Incidentally, if a candy-like semi-liquid is enclosed in place of the water 12, the same effect can be obtained with an even thinner layer.

In the embodiments shown in FIGS. 5 to 7, water 12 is sealed between the downstream piece 3 and the intermediate piece 4, but as shown in FIG. A tube 14 such as a hose whose inner surface is filled with water may be adhered in the longitudinal direction of the rubber weir 1.

In this embodiment as well, the same effects as in FIGS. 5 to 7 can be obtained.

Furthermore, as shown in FIG.
The same effects as those shown in FIGS. 8 through 8 can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional side view showing a conventional rubber weir in an expanded and upright state, Fig. 2 is a cross-sectional side view showing its collapsed and collapsed state, and Fig. 3 is a cross-sectional side view showing another conventional rubber weir in an inflated and upright state. FIG. 4 is a cross-sectional side view illustrating the contracted and collapsed state; FIG. 5 is a cross-sectional side view of the flexible membrane weir according to the present invention in a state where no water is injected into it; FIG. 6 is a cross-sectional side view illustrating the inflated upright state of the flexible membrane weir according to the present invention;
FIG. 7 is a cross-sectional side view illustrating the deflated and collapsed state, FIG. 8 is a cross-sectional side view illustrating the inflated and upright state of another embodiment, and FIG. 9 is an enlarged explanatory view of the main parts of another embodiment. be. 1...Rubber weir, 2...Upstream side piece, 3...Downstream side piece, 4...Intermediate piece, 5...Protrusion, 6...Overlap side edge, 7...River bed concrete, 8 ... Top surface, 9 ... Presser foot, 10 ... Anchor bolt, 1
1...Natsuto, 12...Water, 13...Stone, 14...
...Tube, 15...Rubber bulb.

Claims (1)

[Scope of utility model registration request] A flexible membrane weir that is laid across a river, etc., and expands and stands up when gas is filled in, and contracts and collapses when it is discharged, has at least one bag body filled with liquid at the bottom of the flexible membrane weir. A flexible membrane weir featuring: