JP4180213B2 - Driftwood stopper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention can effectively catch driftwood, especially driftwood during floods, and can minimize adverse effects on natural destruction and landscapes. It provides a driftwood stopper that can be easily maintained.
[0002]
[Prior art]
Driftwood flowing from the upstream during floods will cause significant damage downstream. Therefore, for example, in the non-permeable steel frame as shown in FIG. 6, a secondary dam (not shown) is provided on the downstream side of the steel frame and flows from the water passage portion 3 of the steel frame. Driftwood was captured by a secondary dam. In addition, a steel frame is comprised from what connected the steel frame 1 filled with filling materials 2, such as a cobblestone and crushed stone, vertically and horizontally.
[0003]
[Problems to be solved by the invention]
However, the secondary dam needs to be constructed separately from the steel framework, so it requires not only a large amount of money and construction site, but the construction of the dam may cause natural destruction by cutting trees or cutting mountains. Or, there was a risk of damaging the landscape. There are many places in the country where damage to driftwood is expected during floods, and it is almost impossible to build dams at all these places.
[0004]
Therefore, conventionally, it is possible to effectively capture driftwood during floods, and to minimize the adverse effects on natural destruction and landscapes. Furthermore, it is easy to construct and requires minimal maintenance. The development of driftwood stops was strongly desired.
[0005]
However, the current situation is that such a driftwood stopper has not yet been developed.
[0006]
Accordingly, the object of the present invention is to effectively capture driftwood during a flood, and to minimize the adverse effects on natural destruction and landscapes. Further, the construction cost is easy and light. The purpose is to provide driftwood stoppers that can be maintained.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 is a driftwood stopper for catching driftwood flowing from upstream of a valley at the time of flooding. A base fixed to the bottom of the valley and catching stretched between both sides of the valley. A floating body fixed to the capturing body, and at all times, the floating body is accommodated in the base in a state where the floating body is attached to the capturing body. The buoyant force leaves the base and floats on the flowing water together with the catcher, and thus the catcher is stretched between both sides of the valley, so that a driftwood stopper is naturally installed in the valley during a flood. It has the characteristics in that.
[0008]
According to a second aspect of the present invention, the floating body is formed in a hollow cylindrical shape with a bottom, and a semicircular recess for accommodating the cylindrical floating body is formed on the upper surface of the base. It has the characteristics.
[0009]
According to a third aspect of the present invention, the capturing body is formed in a net shape, the floating body is attached to the uppermost part of the capturing body, and the capturing body has a length that sags downstream of running water during a flood. It is characterized by having.
[0010]
The invention according to claim 4 is characterized in that the capturing body is made of a wire or a chain.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, one embodiment of the driftwood stopper of the present invention will be described with reference to the drawings.
[0012]
FIG. 1 is a schematic plan view showing a driftwood stopper of the present invention constructed in a valley at any time, FIG. 2 is a schematic front view showing a driftwood stopper of the present invention constructed in a valley at any time, and FIG. FIG. 4 is a schematic front view showing the driftwood stopper of the present invention constructed in the valley during flooding, and FIG. 5 is housed on the base. It is a schematic perspective view which shows a floating body.
[0013]
1 to 5, reference numeral 4 denotes a concrete base fixed to the bottom 6 of the valley 5 where a driftwood is expected to occur during a flood. On the upper surface of the base 4, a semicircular recess 4 </ b> A for accommodating a floating body described later is formed. In this example, two each of the base 4 and the floating body are provided, but may be one or two or more according to the width of the valley 5.
[0014]
Reference numeral 7 denotes a capturing body stretched between both side portions of the valley 5. Both ends of the capturing body 7 are fixed to anchors 8 constructed in the valley 5. The capturing body 7 is made of a wire or chain assembled in a net shape. The catcher 7 has a length that sag on the downstream side of the running water during a flood, and the lower part of the catcher 7 is submerged below the running water surface so that the driftwood can be easily caught.
[0015]
9 is a steel floating body fixed to the upper part of the capturing body. The floating body 9 is formed in a bottomed hollow cylindrical shape. The shape of the floating body 9 is not limited to a cylindrical shape, but a cylindrical shape is preferable in order to minimize damage due to collision of driftwood. An insertion hole 9A of the capturing body 7 is formed in the central axis portion of the floating body 9, and the floating body 9 is attached to the capturing body 7 by inserting the upper portion of the capturing body 7 into the insertion hole 9A. The floating body 9 is accommodated in the recessed portion 4A of the base 4 via the capturing body 7 at all times, that is, when the amount of flowing water flowing through the valley 5 is small. On the other hand, during a flood, the floating body 9 separates from the base 4 due to its buoyancy and floats on the running water together with the capturing body 7.
[0016]
The driftwood stopper of the present invention configured as described above is naturally installed in a valley during a flood as follows.
[0017]
Normally, as shown in FIGS. 1, 2, and 5, the floating body 9 is accommodated in the recessed portion 4 </ b> A of the base 4 by its own weight. On the other hand, when the amount of flowing water increases during a flood, the floating body 9 separates from the base 4 due to its buoyancy and floats on the flowing water together with the capturing body 7 as shown in FIGS. Thus, the capturing body 7 is stretched between both sides of the valley 5, so that a driftwood stopper is naturally installed in the valley 5 during a flood. The driftwood is captured by the mesh capturing body 7 and does not flow downstream.
[0018]
If the driftwood is removed from the capturing body 7 after the flooding and the floating body 9 is artificially accommodated in the recessed portion 4A of the base 4 again, the driftwood stopper can be used repeatedly.
[0019]
When constructing a driftwood stop, there is almost no need to cut down trees or cut down mountains, and after construction of the driftwood stop, only the catcher 7 and the floating body 9 on the base 4 will appear. There is very little fear of damage. Furthermore, the construction cost is much lower than when constructing a secondary dam.
[0020]
【The invention's effect】
As described above, according to the present invention, by including the base fixed to the bottom of the valley , the net-like capturing body stretched between both sides of the valley , and the floating body fixed to the capturing body, At all times, the floating body is accommodated in the base in a state attached to the capturing body. On the other hand, during a flood, the floating body separates from the base due to its buoyancy and floats on the flowing water together with the capturing body. Thus, the capturing body is stretched between both sides of the valley, and thus a driftwood stopper is naturally installed in the valley during a flood. Therefore, when constructing driftwood stops, there is almost no need to cut trees or cut mountains, and after constructing driftwood stops, only the traps and floating bodies on the base will appear. There is very little risk of damage, and further, there is a useful effect such that the construction cost is much lower than when constructing a sub dam for the purpose of stopping driftwood.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing a driftwood stopper of the present invention constructed in a valley at all times.
FIG. 2 is a schematic front view showing a driftwood stopper of the present invention constructed in a valley at all times.
FIG. 3 is a schematic plan view showing a driftwood stopper of the present invention constructed in a valley during a flood.
FIG. 4 is a schematic front view showing a driftwood stopper of the present invention constructed in a valley during a flood.
FIG. 5 is a schematic perspective view showing a floating body housed on a base.
FIG. 6 is a schematic perspective view showing an impervious steel sabo dam.
[Explanation of symbols]
1: Steel frame 2: Filling material 3: Water passage part 4: Base 4A: Recessed part 5: Valley 6: Bottom part 7: Capturing body 8: Anchor 9: Floating body 9A: Insertion hole

Claims (4)

In driftwood stop to catch driftwood flowing from the upstream of the valley during floods,
A base that is fixed to the bottom of the valley, a capturing body that is stretched between both sides of the valley , and a floating body that is fixed to the capturing body, and the floating body is always captured by the floating body. housed in the base in a state attached to the body, whereas, at the time of flooding, the floating body is floated on water flow together with the catching member away from said base by its buoyancy, thus, the capturing member is the valley A driftwood stopper, which is stretched between both side portions of the roof, and is naturally installed in the valley during a flood.   The said floating body is formed in the bottomed hollow cylindrical shape, The semicircle-shaped recessed part for accommodating the said cylindrical floating body is formed in the upper surface of the said base, It is characterized by the above-mentioned. Driftwood stopper described.   The trapping body is formed in a net shape, the floating body is attached to the uppermost part of the trapping body, and the trapping body has a length that sags on the downstream side of running water during a flood. The driftwood stopper according to claim 1 or 2.   The driftwood stopper according to any one of claims 1 to 3, wherein the capturing body is made of a wire or a chain.

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