JP2533691Y2 - Simple fishway equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple fishway device which can be easily installed on an existing weir without a fishway.

[0002]

2. Description of the Related Art Conventionally, dams and weirs provided in rivers are used for storing water, preventing flood damage, and the like. In recent years, some dams and weirs that have been designed and constructed have a fishway attached to maintain the ecosystem of fish. In the fishway, a long water channel from the upstream side to the downstream side made of concrete bypassing the dam and weir is provided, and a plurality of concrete or steel plate weirs are gradually added to the waterway in a stepwise manner. There is an installed channel. Usually, the height of the weir provided on the downstream side of the stepped fishway installed in this manner is adjusted according to the fluctuation of the water level on the upstream side. In addition, there is a fishway provided with a partition wall in which a part of the top of the weir is cut out to facilitate the backward movement of the fish.

[0003]

[Problem to be Solved by the Invention] However, when constructing a weir, if the site around the weir is too narrow to be able to add a fishway, the planned site may need to be changed. In addition, even when a fishway is attached to an existing weir without a fishway, if the natural environment is prioritized, installation space is also restricted in repair work on the weir for providing the fishway. In addition, in areas with rugged terrain, labor is required for material transportation and leveling work, and it is difficult to install fishways. For this reason, what can attach a fishway by simple work without being affected by the environment is desired.

[0004] It is an object of the present invention to provide a simple fishway device that is convenient for transportation and easy to assemble.

[0005]

In order to achieve the above object, the present invention provides a pair of pipes which are provided at the tip with hooks connected to the top of a weir and which are arranged in parallel at intervals. A cross pipe connected downwardly between the pipes at a plurality of intervals, a sheet covering the pair of pipes and the plurality of cross pipes to form a gutter, and And a partition plate provided with a plurality of intervals and having a notch at the top.

Further, a pair of pipes and a cross pipe may be made separable, and a sheet and a partition plate may be made separable. The sheet and the partition plate may be made of rubber or a flexible member instead. Is also good.

[0007]

Since the fishway device of the present invention is constructed as described above, when constructing a small-scale weir where it is difficult to attach a fishway, or in an existing weir, a pair of By hooking the hook of the pipe and setting the lower end of the fishway device downstream in the waterway, the overflow water from the weir is stored upstream of the partition plate in the gutter-shaped fishway device by the cross pipe. Then, a water channel is formed over the partition plate. In addition, since it has a simple structure using only pipes and sheets, it is easy to carry and assemble.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, at the place where the undulating weir 2 is provided across the water channel 1, the tip of the fishway device 3 is hooked 4 a of a pair of pipes 4, 4 arranged in parallel at intervals. The fishway device 3 is connected to the top of the weir by 4a, the downstream end of the fishway device 3 is in contact with a riverbed of a predetermined depth in the waterway, and the fishway device 3 is provided at an angle. The undulating weir 2 can be raised and lowered by a lower shaft 5. Therefore,
The lower ends of the pair of pipes 4 and 4 are made easy to slide, and are bent upward to reduce friction.

An arc-shaped cross pipe 6 is connected between the pair of pipes 4 and 4 at a plurality of intervals in a downwardly convex shape as shown in FIG. The cross pipe 6 is fitted to the small pipe 7 fixed at each of the positions 4. Further, the pair of pipes 4 and the plurality of cross pipes 6 are covered with a sheet 8 so as to form an entire gutter shape, and as shown in FIG. Can be fixed to the pipe 4. The sheet 8 is made of rubber or flexible plastic to form a smooth surface.

A plurality of partition plates 10 provided on the sheet at intervals are formed of rubber or flexible plastic,
As shown in FIG. 4, an overflow point 11 at the upper center is formed flat, and slopes 12 are formed on both sides. Also, the partition plate 10
Is formed in an arc shape, and an attachment plate 13 made of a similar material is welded to the lower end along the surface of the sheet 8. The sheet 8 and the partition plate 10 are assembled integrally by inserting bolts into the holes 14 of the mounting plate 13 and tightening.

As shown in FIG. 5, a hook 4a of the pair of pipes 4 is supported by a support shaft 2 via a bracket 15 on a dam top 2a.
The hook 16 may be scratched on the support shaft 16 by providing the support shaft 16. In addition, the pair of pipes 4 and the cross pipe 6, and the sheet 8 and the partition plate 10 are made separable, and are made of a lightweight material to facilitate transportation and assembly.

The fishway device 3 constructed as described above can be provided at a part of a weir in a waterway inclining downstream in a small-scale weir or an existing weir. Water is stored in each partition plate 10 of the device 3, and water flows from an overflow point 11 in the upper center, thereby forming a water channel to enable fish to go backward. In addition, since the weir apex 2a and the upstream end of the fishway device 3 are linked at the same height, it is possible to follow the fluctuation of the water level and to divert it to the fixed weir.

Further, since the fishway device 3 has a simple structure using only the pipes 4, 6 and the sheet 8, it is easy to carry and assemble. Therefore, even when the fishway device 3 is constructed in a steep terrain, it can be easily transported and assembled. In addition, when added to an existing weir, the load on the weir can be installed without deteriorating the function of the weir because the load on the weir is lightweight. The shape of the cross pipe 6 installed on the pair of pipes 4 and 4 may be V-shaped, and the pair of pipes 4 and 4 may be bent from a straight line into an arc.

[0014]

[Effects of the Invention] Since the present invention is constructed as described above, it can be prepared with lightweight members, can be easily carried and assembled, and can be installed anywhere. In addition, it can be mass-produced at low cost. In addition, it can be installed in waterways even on existing weirs without fishways,
The revetment can be left as it is.

[Brief description of the drawings]

FIG. 1 is a side view of a simplified fishway device according to an embodiment of the present invention.

FIG. 2 is a plan view of the simple fishway device shown in FIG.

FIG. 3 is a sectional view of the simple fishway device shown in FIG. 1;

FIG. 4 is a perspective view of a partition plate of the simple fishway device shown in FIG.

FIG. 5 is a side view of a main part of the simplified fishway device shown in FIG. 1;

[Explanation of symbols]

 2a Weir top 4 Pipe 4a Hook 6 Cross pipe 8 Sheet 10 Partition plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A pair of pipes which are provided at a tip thereof and which are connected to the top of a weir and which are arranged in parallel with a gap therebetween, and a plurality of gaps formed by projecting downward between the pair of pipes. A cross-pipe, a sheet covering the pair of pipes and the plurality of cross-pipes to form a gutter, and a plurality of partitions provided on the gutter-shaped sheet at intervals and having a notch at the top. A simple fishway device comprising: a plate.