JPH0646033U - Simple fishway device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a simple fishway device that can be easily installed in an existing weir without a fishway, especially in a river with a small river width. [Structure] In a river 1 in which a weir 3 is provided across both banks 2 and 2 in a direction of a width 1a, a base of an undulating gate 4 that undulates toward a downstream side is pivotally attached to a part of the weir 3. At one end of the undulating gate 4, one end of a fishway 10 having a predetermined width was pivotally attached, and at the other end of the fishway 10, a roller 15 rotating in contact with the river bottom 14 of the river 1 was pivoted. Since the posture of the fishway 10 changes when the undulating gate 4 is undulated by the hydraulic cylinder mechanism 7 or the like,
It can make it easier for fish to pass depending on the water level.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a simple fishway device that can be easily installed in an existing weir without a fishway.

[0002]

[Prior art]

 Conventionally, dams and weirs installed in rivers have been used for water storage, water damage prevention, etc. In recent years, some dams and weirs that have been designed and constructed have a fishway installed to maintain the fish ecosystem. In the fishway, a long waterway from the upstream side to the downstream side, bypassing the dam and the weir, is provided by a concrete wall, and a plurality of weir bodies made of concrete or steel plates are gradually added to the waterway in a stepwise manner. There is a flow path installed. The staircase-shaped fishway installed in this way normally adjusts the height of the weir installed on the upstream or downstream side according to the fluctuation of the water level upstream and downstream. In addition, several weirs cut out a part of the top of the weir to facilitate the retrograde movement of fish.

[0003]

[Problems to be solved by the device]

 However, when constructing a weir, if the site around the weir is small and it is not possible to add a fishway, the planned site will have to be changed. In addition, even for existing weirs that do not have fishways, if the natural environment is prioritized, the construction work of dams to establish fishways will also be restricted. In addition, it is difficult and costly to install fishways in areas with rugged terrain. For this reason, it is desired to have 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 that does not require a new installation space and can therefore be easily installed without expanding the river width.

[0005]

[Means for Solving the Problems] As a means for solving the above problems, the present invention provides a part of the weir on a downstream side in a river where a weir is provided so as to cross in the width direction between both banks. The base of the undulating gate that undulates toward and away from the shaft is pivotally attached to the tip of the undulating gate at one end of a fishway of a specified width, and at the other end of the fishway there is a roller that rotates in contact with the bottom of the river. It is characterized by being pivoted.

In addition, in a river in which a weir is provided across both banks in the width direction, a base of an undulating gate that undulates toward the downstream side is pivotally attached to a part of the weir, and The hydraulic cylinder mechanism is attached so that the tip of the hydraulic cylinder mechanism is located downstream of the undulation gate and faces the intermediate portion of the undulation gate, and the tip of the rod portion of the hydraulic cylinder mechanism is brought into contact with the undulation gate via a roller. One end of a fishway having a predetermined width is attached to the tip of the undulating gate, and a roller that rotates in contact with the bottom of the river is attached to the other end of the fishway.

In addition, in a river having a weir provided so as to cross in the width direction between both banks, a base of an undulating gate that undulates toward the downstream side is pivotally attached to a part of the weir, and the weir is provided on the shore of the river. Is equipped with a hydraulic cylinder mechanism that undulates the undulating gate, connects the tip end of the rod portion of the hydraulic cylinder mechanism to the shaft of the undulating gate through a torque arm, and connects the tip of the undulating gate to a fishway of a certain width. One end is pivotally attached, and the other end of the fishway is pivotally attached to a roller that rotates in contact with the bottom of the river.

In addition, in a river where a weir is provided so as to cross in the width direction between both banks, a base of an undulating gate that undulates toward the downstream side is pivotally attached to a part of the weir, and a portion of the river bank is formed. Is equipped with a hydraulic cylinder mechanism that undulates the undulating gate, and one end of a fishway of a specified width is pivotally attached to the tip of the undulating gate, and the river bottom facing downstream from the weir is made a flat surface of a specified length. A roller that is formed and rotates in contact with the flat surface is attached to the other end of the fishway.

[0009]

[Advantage] With such a configuration, the undulating gate can be changed to a free angle and held in that state by operating the hydraulic cylinder mechanism, so that even if the water level changes, this can always be accommodated. You will be able to do it. At the time of full lodging, the height of the fishway can be set to a height below the river bed at the upstream, so that the downflow section will not be obstructed.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 is a river in which water flows in the direction of the arrow in the figure, and 1a in FIG. 2 is the river width. A weir 3 is provided between the banks 2 of the river 1 (the lower bank in FIG. 2 is not shown) so as to cross the river 1 in the direction of the river width 1a. The base portion of the undulating gate 4 that undulates toward the downstream side is pivotally attached to a bearing fitting 5 provided on the weir 3 side by a shaft 6.

An end of a rod portion 8 of a hydraulic cylinder mechanism 7 that undulates the undulating gate 4 faces an intermediate portion of the undulating gate 4. The detailed structure of this portion will be described later. The hydraulic piping is not shown. A notch is provided in the upper portion of the undulating gate 4 at the joint with the connecting plate 9 to facilitate passage of fish. At one end of the undulating gate 4, a fishway 10 having a predetermined width is attached by a shaft 11 via a connecting plate 9. As shown in FIG. 2, the fishway 10 has a structure in which a plurality of partition walls 13 are attached at predetermined intervals between two parallel side walls 12.

From the place where the weir 3 of the river 1 is provided, a river bottom 14 having a predetermined length is formed on a flat surface, and the other end of the fishway 10 located at the upper part of that portion is in contact with this flat surface. A rotating roller 15 is mounted on the shaft. A rail-shaped roller guide 16 is laid at a portion where the roller 15 always contacts. 17 is a fishway pedestal.

FIG. 3 specifically shows the undulation mechanism of the undulation gate 4. In this embodiment, since the hydraulic cylinder mechanism 7 is located at the bottom of the river 1, that is, on the downstream side of the undulating gate 4 on the river bottom 14, the hydraulic cylinder mechanism 7 is arranged so that the tip of the rod portion 8 faces the intermediate portion of the undulating gate 4. The rod 8 of the hydraulic cylinder mechanism 7 is attached to the end of the hydraulic cylinder mechanism 7 through a roller 18 and abutted against a hydraulic cylinder receiving member 19 provided on the back surface of the undulating gate 4 (see FIG. 4).

As shown in FIG. 3, the undulating gate 4 has a skin plate 22 extending between the upper main girder 20 and the lower main girder 21 toward the upstream of the river. The skeleton) 23 is provided. The girder 23 supports the load applied to the skin plate 22. In FIG. 3, 24 is a bottom door, 25 is a bottom watertight rubber, 26 is a lower bearing, 27 is a spoiler, 28 is a pedestal for the undulating gate 4, and 29 is a side watertight rubber.

As shown in an enlarged view in FIG. 4, a curved surface 30 is formed on a part of the hydraulic cylinder receiving member 19, and the roller 18 axially attached to the tip of the rod portion 8 of the hydraulic cylinder mechanism 7 is provided. , Is adapted to roll along the curved surface 30. As a result, when the hydraulic cylinder mechanism 7 is activated and the rod portion 8 pushes the undulating gate 4 via the hydraulic cylinder receiving member 19, the undulating gate 4 can move smoothly and can oppose the water flow pressure. Although only one hydraulic cylinder receiving member 19 and hydraulic cylinder mechanism 7 are provided in the figure, a plurality of hydraulic cylinder receiving members 19 and hydraulic cylinder mechanisms 7 may be provided separated by a predetermined distance.

FIG. 5 shows another structure of the portion shown in FIG. In this case, the roller 31 is mounted on the inside of the undulating gate 4 so that the tip of the rod portion 8 of the hydraulic cylinder mechanism 7 abuts on the roller 31. With this structure, an operation similar to that of FIG. 4 can be obtained.

FIG. 6 shows another structure of the connecting portion between the undulating gate 4 and the hydraulic cylinder mechanism 7. In this embodiment, the hydraulic cylinder mechanism 7 is housed inside a box 32 provided on the shore, and the tip of the rod portion 8 of the hydraulic cylinder mechanism 7 is connected via a torque arm 33 to the shaft 34 of the undulating gate 4. Is connected to. In this embodiment, unlike the one shown in FIG. 3 in which the hinge-like lower support 26 is used as the center of rotation, the undulating gate 4 is rotated about this shaft 34 as the center of rotation. Those denoted by the same reference numerals as in FIG. 3 are the same members.

In FIG. 6 described above, the hydraulic cylinder mechanism 7 is shown as being connected to only one side of the undulating gate 4, but this mechanism is also provided on the front side in the figure so that these can be interlocked. Good to do. By interlocking the hydraulic cylinder mechanisms 7 on both sides, the undulating gate 4 can be operated smoothly.

FIG. 7 and FIG. 8 are enlarged views of the joint between the undulating gate 4 and the fishway 10. As shown in these figures, the upper portion of the undulating gate 4 is pivotally attached by a shaft 11 to a connecting plate 9 connected to the upper end of the fishway 10 by a bolt 35. Providing the connecting plate 9 facilitates production and on-site assembly.

In this simple fishway device configured as described above, when the undulating gate 4 is undulated by operating the hydraulic cylinder mechanism 7 to make the rod portion 8 project and retract, the undulating gate 4 is pivotally attached to the undulating gate 4. Since one end (upper end) of the fish path 10 is pulled or pushed, the roller 15 attached to the other end (lower end) is rotated on the roller guide 16 so that the solid line or the broken line in FIG. The attitude (angle) will be changed. As a result, the angle can be adjusted according to the water level, and the fish can move freely from left to right in the figure. In this case, if the notches 13a shown in FIG. 2 are alternately provided on the partition wall 13 of the fishway 10, the water level accumulated in the fishway 10 can be changed, so that the fish can be more easily fished. You will be able to pass.

[0021]

[Effect of device]

 Since the present invention is the simple fishway device configured as described above, the fishway can be adjusted to an angle according to the water level simply by operating the hydraulic cylinder mechanism. As a result, it is possible to obtain a road that is easy for fish to pass through without expanding the width of the river as in conventional fishways. Therefore, it can be applied to rivers with a small river width.

[Brief description of drawings]

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

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

FIG. 3 is a diagram specifically showing an undulating mechanism of an undulating gate.

FIG. 4 is a cross-sectional view showing a contact portion between the undulating gate and the hydraulic cylinder mechanism in FIG.

FIG. 5 is a cross-sectional view showing an example different from FIG.

FIG. 6 is a cross-sectional view showing another structure of the contact portion between the undulating gate and the hydraulic cylinder mechanism.

FIG. 7 is an enlarged side view of the joint between the undulating gate and the fishway.

8 is a plan view of that of FIG. 7. FIG.

[Explanation of symbols]

 1 river 2 bank 3 weir 4 undulating gate 5 bearing metal fitting 6 axis 7 hydraulic cylinder mechanism 8 rod part 9 connecting plate 10 fishway 11 axis 12 side wall 13 bulkhead 14 river bottom 15 roller 16 roller guide 17 fishway cradle 18 roller 31 roller 33 torque arm 34 axes

Claims (4)

[Scope of utility model registration request] 1. In a river in which a weir is provided across both banks in the width direction, the base of an undulating gate that undulates toward the downstream side is axially attached to a part of the weir, and the tip of the undulating gate. A simple fishway device, wherein one end of a fishway having a predetermined width is pivotally attached to the portion, and a roller that rotates in contact with the bottom of the river is attached to the other end of the fishway. 2. In a river in which a weir is provided across both banks in the width direction, the base of an undulating gate that undulates toward the downstream side is pivotally attached to a part of the weir, and The hydraulic cylinder mechanism is attached so that the tip of the hydraulic cylinder mechanism is located downstream of the undulation gate and faces the intermediate portion of the undulation gate, and the tip of the rod portion of the hydraulic cylinder mechanism is brought into contact with the undulation gate via a roller. A simple fishway device, wherein one end of a fishway having a predetermined width is pivotally attached to the tip end of the undulating gate, and a roller which rotates in contact with the bottom of the river is attached to the other end of the fishway. 3. In a river provided with a weir so as to cross in the width direction between both banks, a base of an undulating gate that undulates toward the downstream side is pivotally attached to a part of the weir, and the weir is provided on the shore of the river. Is provided with a hydraulic cylinder mechanism that undulates the undulating gate, connects the tip of the rod portion of the hydraulic cylinder mechanism to the shaft of the undulating gate via a torque arm, and attach one end of the fishway of a predetermined width to the tip of the undulating gate. A simple fishway device, which is pivotally mounted, and at the other end of the fishway is a roller that rotates in contact with the bottom of a river. 4. In a river provided with a weir so as to cross in the width direction between both banks, a base of an undulating gate that undulates toward the downstream side is pivotally attached to a part of the weir, and a portion of the river bank Is equipped with a hydraulic cylinder mechanism that undulates the undulating gate, and one end of a fishway of a predetermined width is pivotally attached to the tip of the undulating gate, and a riverbed facing downstream from the weir is formed on a flat surface of a predetermined length. A simple fishway device, characterized in that a roller that rotates in contact with the flat surface is attached to the other end of the fishway.