JP2533694Y2 - 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 waterway from the upstream to the downstream is provided by a concrete wall, bypassing the dam and weir, and a plurality of concrete or steel plate dams are gradually added to the waterway in a stepwise manner. There is an installed channel. The height of the weir provided on the upstream side or the downstream side of the stepped fishway is usually adjusted according to the fluctuation of the water level of the upstream side and the downstream side. In addition, the plurality of weirs are cut off at a part of the top of the weir to facilitate the backward movement of fish.

[0003]

[Problem to be Solved by the Invention] However, when constructing a weir, if the site around the weir is too narrow to have a fishway, it is necessary to change the planned site. Also, in the existing weir without a fishway, if the natural environment is prioritized, the repair work of the weir for providing the fishway is also restricted. In addition, the installation of fishways is difficult and costly in rugged areas. For this reason, there is a demand for a fishway device that can be easily installed without being affected by the location of the weir and without increasing the river width.

An object of the present invention is to provide a simple fishway device which can be easily installed without requiring a new installation space and therefore without widening a river.

[0005]

According to the present invention, as a means for solving the above-mentioned problem, in a river provided with a weir so as to traverse across the width between the banks, a part of the weir is provided. A gate is provided toward the downstream side, and one end of a fishway formed in a gutter shape is fixed to the tip of the gate by pulling a rubber cloth of a predetermined width with a rope, and the other end of the fishway is set up at the bottom of the river. It is characterized by being fixed to a supporting column.

As the gate, an undulating gate that undulates toward the downstream side of the river can be considered, but a fixed type that does not undulate may be used.

[0007]

With this configuration, the fish can pass through a fishway formed in a gutter-like shape by pulling a rubber cloth with a predetermined width fixed to the tip of the gate with a rope. If the gate is an up / down gate, the up / down gate can be changed to a free angle by operating the hydraulic cylinder mechanism, and the state can be maintained. Therefore, always respond to this even if the water level changes. Can be done. At the time of full fall, the height of the fishway can be set to a height below the riverbed upstream, so that the downflow section is not hindered.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention in which an undulating gate is used as a gate will be described below with reference to FIGS. Numeral 1 denotes a river in which water flows in the direction of the arrow in the figure, and the width indicated by 1a in FIG. 2 is the river width. River 1
Between the shore 2 (the lower shore is not shown in FIG. 2), a weir 3 is provided so as to cross the river 1 in the direction of the river width 1a, and a part of the weir 3 is located downstream. The base of the undulating gate 4 that rises and falls is mounted on a bearing metal fitting 5 provided on the weir 3 side by a shaft 6.

The tip of the rod portion 8 of the hydraulic cylinder mechanism 7 that raises and lowers the gate 4 faces the middle of the gate 4. The detailed structure of this part will be described later. The illustration of the hydraulic piping is omitted. A notch is provided at the upper part of the undulating gate 4 with the connecting plate 9 so that the fish can easily pass through.

At the tip of the undulating gate 4, two shafts 9 and 10 are provided at predetermined intervals so as to protrude on both sides. 11, 12
Is locked at one end. As shown in FIG. 3, the main ropes 11 and 12 each having two left and right sides are provided with a lateral auxiliary rope 13.
And a vertical auxiliary rope 14 is stretched, and a rubberized cloth 15 is stretched outside thereof. This forms a trough-shaped fishway 16 as a whole. One end of fishway 16 is left and right as above
Each of the main ropes 11 and 12 is locked to the shafts 9 and 10 by the main ropes 11 and 12, but the other end is fixed to the bottom of the river 1, that is, a column 18 standing on the river bottom 17.

FIG. 4 specifically shows the undulating mechanism of the undulating gate 4. As shown in FIG. In this embodiment, the hydraulic cylinder mechanism 7 is mounted so that the tip of the rod portion 8 faces the intermediate portion of the up / down gate 4 from the bottom of the river 1, that is, the downstream side of the up / down gate 4 of the river bottom 17. The tip of the rod portion 8 of the hydraulic cylinder mechanism 7 is connected to the hydraulic cylinder receiving member 20 provided on the back surface of the
(See FIG. 5).

As shown in FIG. 4, the undulating gate 4 has a skin plate 23 extending between the upper main girder 21 and the lower main girder 22 toward the upstream of the river. ) 24 are provided. The girder bar 24 supports the load applied to the skin plate 23. In FIG. 4, 25
Is a bottom door contact, 26 is a bottom watertight rubber, 27 is a lower bearing, 28 is a spoiler, 29 is a cradle of the up / down gate 4, and 30 is a side watertight rubber.

As shown in FIG. 5 in an enlarged manner, a curved surface 31 is formed on a part of the hydraulic cylinder receiving member 20, and a roller 19 fixed to the tip of the rod portion 8 of the hydraulic cylinder mechanism 7.
However, it rolls along this curved surface 31. As a result, when the hydraulic cylinder mechanism 7 operates and the rod portion 8 pushes the undulating gate 4 via the hydraulic cylinder receiver 20, the movement of the undulating gate 4 is made smooth, and the pressure of the water flow can be countered. Although only one hydraulic cylinder receiver 20 and one hydraulic cylinder mechanism 7 are provided in the drawing, a plurality of hydraulic cylinder receivers 20 may be provided at predetermined intervals.

FIG. 6 shows another structure of the portion shown in FIG. In this case, a roller is placed inside the undulating gate 4.
The end of the rod portion 8 of the hydraulic cylinder mechanism 7 contacts the roller 32. In this structure, substantially the same operation as that of FIG. 5 can be obtained.

FIG. 7 shows another structure of the connecting portion between the up / down gate 4 and the hydraulic cylinder mechanism 7. In this embodiment, the hydraulic cylinder mechanism 7 is housed in a box 33 provided on the shore, and the tip of the rod 8 of the hydraulic cylinder mechanism 7 is connected to the shaft 35 of the undulating gate 4 via the torque arm 34. Are combined. In this embodiment, unlike the one shown in FIG. 4 in which the hinge-shaped lower support 27 is used as the center of rotation, the up / down gate 4 rotates about this shaft 35 as the center of rotation. Those denoted by the same reference numerals as those in FIG. 4 are the same members.

In FIG. 7, the hydraulic cylinder mechanism 7
Is shown to be connected to only one side of the undulation gate 4, but this mechanism is preferably provided on the near side in the figure as well, and these may be linked to each other. By interlocking the hydraulic cylinder mechanisms 7 on both sides, the up / down gate 4 can be operated smoothly.

In the simple fishway device thus constructed, when the hydraulic cylinder mechanism 7 is operated to extend and retract the rod portion 8 to raise and lower the up / down gate 4, the main ropes 11 and 12 are connected to the up / down gate 4. Fishway 16 with one end locked
Are stretched as shown by a solid line in FIG. 1 or lowered as shown by a broken line. As a result, the state can be set according to the water level, so that the fish can freely move from left to right in the figure. In this case, a notch as shown in FIG.
If the 15a is provided alternately, the level of water accumulated in the fish passage 16 can be varied, so that fish can pass more easily.

In the embodiment described above, a gate which is undulating is used, but the present invention is not limited to this. A gate that does not undulate in a fixed state may be used.
Also in this case, the fish can pass through a fishway formed in a gutter-like shape by pulling a rubberized cloth having a predetermined width fixed to the tip of the gate with a rope.

[0019]

[Effects of the Invention] Since the present invention is a simple fishway device constructed as described above, the fish is formed into a gutter-like shape by pulling a rubber cloth with a predetermined width fixed to the tip of the gate with a rope. You can go through the fishway. If the gate is an up-and-down gate driven by a hydraulic cylinder mechanism, the fishway can be adjusted to a state corresponding to the water level only by operating the hydraulic cylinder mechanism. As a result, a path that is easy for fish to pass through can be obtained without increasing the width of the river unlike the conventional fish path. Therefore, it can be used for rivers with small river widths. Since the fishway is formed of a rope and a rubberized cloth, the fishway is more fish-friendly than a fishway made of other materials.

[Brief description of the drawings]

FIG. 1 is a side view showing a partial cross section of an embodiment of the present invention.

FIG. 2 is a plan view of that of FIG.

FIG. 3 is a perspective view showing a fishway in FIG. 1;

FIG. 4 is a view specifically showing an undulating mechanism of an undulating gate.

FIG. 5 is a cross-sectional view showing a contact portion between an undulating gate and a hydraulic cylinder mechanism in FIG. 3;

FIG. 6 is a cross-sectional view showing an example different from FIG.

FIG. 7 is a cross-sectional view showing another structure of a contact portion between the up / down gate and the hydraulic cylinder mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 River 2 shore 3 Weir 4 Undulating gate 5 Bearing bracket 6 Axis 7 Hydraulic cylinder mechanism 8 Rod part 9 Axis 10 Axis 11 Main rope 12 Main rope 13 Auxiliary rope 14 Auxiliary rope 15 Rubberized cloth 16 Fishway 17 Riverbed 18 Prop

Claims (1)

(57) [Scope of request for utility model registration] 1. In a river provided with a weir across both banks in the width direction, a gate is provided on a part of the weir toward the downstream side, and a rubber cloth of a predetermined width is provided at a tip of the gate. A simple fishway apparatus characterized in that one end of a fishway formed in a gutter shape is fixed by pulling the fishway with a rope, and the other end of the fishway is fixed to a support standing on the bottom of a river.