JPH08317744A - Apparatus for preventing fishes from straying - Google Patents

Abstract

PURPOSE: To prevent fishes from straying into a channel, etc., and move the fishes to a river, etc., by stretching a water-permeable curtain in the form of a shop curtain or a reed screen in a water area for straying the fishes thereinto. CONSTITUTION: This apparatus 7 for preventing fishes having a curtain 9 stretched on the downstream side of a bar screen 3 of an inlet channel 2 of a river 1 so as to cross the channel. The bottom of the curtain 9 constituted by installing many tapes made of a synthetic resin or natural cloths in the form of a shop curtain or a reed screen in many rows is fixed to the channel bottom 2B or a weight is attached thereto. Although the curtain shakes and keeps the fishes away therefrom in spite of its ability to pass water therethrough.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fish stray prevention device for preventing fish from flowing into a small river branched from a main river, an intake channel or the like.

[0002]

2. Description of the Related Art Generally, a dust screen is installed at the entrance of an intake channel that branches off from a mainstream river, and an intake gate is provided at the downstream side of the intake screen so that it can be opened and closed. It is supposed to open.

[0003]

By the way, the problem that fish entering the intake channel through the dust screen flows into the intake channel downstream when the intake gate is opened, and the fish does not run up or down the main stream river. There is.

The present invention has been made in view of the above situation, and an object thereof is to prevent fish from entering a waterway or the like and move the fish to a desired place such as a mainstream river. It is to provide a fish stray prevention device that is capable.

[0005]

In order to achieve the above object, the present invention takes the following technical means. That is, the present invention is characterized in that a curtain, such as a tape or the like, that allows water to pass through in the form of tape or the like is stretched in the stray water area of a fish such as a water channel. Further, the present invention is characterized in that the curtain is reciprocated in a direction orthogonal to the water flow.

Further, according to the present invention, the curtain has a curtain support, a carriage on which the curtain is reciprocally mounted, a curtain main body hung on the carriage, and a drive means for the carriage. It is characterized by consisting of and.

[0007]

According to the present invention, since the curtain-constituting member that hangs in the shape of a warm curtain or a curtain flutters with the flow of water, it stimulates the visual sense of the fish and prevents the fish from approaching the curtain and entering the waterway or the like. Can be prevented. further,
By actively moving the curtain, it effectively stimulates the sight of fish.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention (1)
Is a mainstream river, and (2) is an intake channel, and a bar screen (3) for dust removal is arranged at the entrance (2A) of the intake channel (2) so as to cross the channel. In the intake channel (2), a curtain (9) is installed on the downstream side of the bar screen (3), and an intake gate (4) is located on the downstream side of the bar screen (3) so that it can be moved up and down. It is adapted to be lifted and lowered by an opening / closing device (6) provided in the machine room (5).
The intake channel (2C) is a part of the intake channel (2) and is between the screen (3) and the curtain (9).

(7) is a fish stray prevention device, which comprises a curtain (9) stretched across the water channel between the water channel side walls (8) on the upstream side of the water intake gate (4). The curtain (9) constituting the device (7) is made of a large number of synthetic resin tapes (or natural cloths) arranged in a hanging shape at predetermined intervals between the water channel side walls (8), and allows water to pass through. It is like this. (10) is an intake weir.

The lower end of the curtain (9) is fixed to the road bottom (2B) or attached with a weight so that the curtain (9) does not float by the water flow. According to the above embodiment, the curtain (9) flutters with the water flow by raising the intake gate (4) and opening the water channel, and through the screen (3) the water intake channel (2C). The fish that enter the inside are not approached due to the stimulus of their visual sense, and they do not return to the main stream river (1) and enter the intake channel (2).

FIGS. 3 and 4 show a second embodiment of the present invention, in which a curtain (9) is a beam-shaped curtain support (11) provided between the water channel side walls (8) and (8) top ends. ), A carriage (12) mounted on the support (11) so as to reciprocate in the waterway width direction, a curtain body (13) suspended from the carriage (12), and a carriage driving means (14). Consists of
The curtain body (13) is adapted to reciprocate in a direction orthogonal to the water flow.

In the curtain body (13), a large number of synthetic resin tapes (13A) are suspended and fixed to the frame body (15) at the upper end at arbitrary intervals, and a bar-shaped weight is attached to the lower end of each tape (13A). A weight (16) is attached to each tape (1
3A) is configured so that the flowing water flows with almost no resistance.

The frame (15) is provided with a suspension rod (1
It is attached to the carriage (12) by 7). A groove (18) having a depth corresponding to the stroke of the truck (12) is provided on the side walls (8) of both channels, and the length of the curtain body (13) is equal to the stroke of the truck (12). The width of the curtain main body (13) is made longer than the width of the curtain main body (13) so that the curtain main body (13) can always cross the entire width of the intake channel (2). .

One end of the driving means (14) has a carriage (1
Crank rod (19) pin-connected to the end of 2)
And a disk-shaped crank (21) pivotally attached to the other end of the crank rod (19) and rotatably attached to a vertical shaft (20) erected on the water channel side wall (8), and the crank (21).
The drive pinion (24) meshes with a tooth portion (22) provided on the outer periphery of the drive shaft and is fixed to the output shaft (23A) of the speed reducer (23), and a drive motor (25).

According to the second embodiment, the drive motor (2
By the operation of 5), the carriage (12) reciprocates in a direction indicated by an arrow in the figure with a constant stroke, and the synergistic effect of this reciprocation and the water flow causes the tapes (13A) to flutter compulsively. Therefore, it is possible to effectively stimulate the visual sense of the fish and reliably prevent the fish from entering the intake channel (2).

The color of the tape constituting the curtain (9) is preferably white, but a color effective for stimulating the sight of fish can be selected and adopted, and the width of the tape, the number of tapes, etc. can be selected appropriately. Further, the curtains (9) can be arranged in a plurality of rows in the upstream and downstream directions.

The present invention is not limited to the above-mentioned embodiment. For example, the drive means (14) can adopt other reciprocating mechanism, and the drive motor can be a power source such as solar, wind power or commercial power source. Can be used, and the design can be changed as appropriate.

[0018]

As described above, the present invention is characterized in that a curtain, such as a tape or the like, which allows water to pass through in the form of tape or the like is stretched over the stray water area of a fish such as a waterway. , It is possible to reliably prevent fish from getting close to the curtain and getting into the waterway. Further, the present invention is characterized in that the curtain is reciprocated in a direction orthogonal to the water flow, so that the curtain is forcibly oscillated to effectively stimulate the visual sense of the fish and to ensure a stray. Can be prevented.

Further, according to the present invention, the curtain includes a curtain support, a carriage on which the curtain is reciprocally mounted, a curtain main body hung on the carriage, and driving means for the carriage. Therefore, the curtain can be swung smoothly and reliably.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional side view showing a first embodiment of the present invention.

FIG. 2 is a partially omitted plan view of FIG.

FIG. 3 is a front view showing a second embodiment of the present invention.

FIG. 4 is a plan view of FIG. 3;

[Explanation of symbols]

 2 Intake channel 7 Fish stray prevention device 9 Curtain 11 Curtain support 12 Bogie 13 Curtain body 14 Drive means

Claims (3)

[Claims] 1. A fish stray prevention device, characterized in that, in a stray fish entry area such as a waterway, a curtain made of tape or the like is stretched to allow the passage of hot water in the form of a curtain or a blind. 2. The fish stray prevention device according to claim 1, wherein the curtain is configured to reciprocate in a direction orthogonal to a water flow. 3. The curtain comprises a curtain support, a carriage mounted on the support so as to be capable of reciprocating movement, a curtain main body suspended from the carriage, and a drive means for the carriage. The fish stray prevention device according to claim 2, wherein