JPH0756332Y2 - Fish nest block - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention relates to a concrete block that can be used as a revetment for riverbanks in rivers and as a nesting or hiding place for river fish. More specifically, a fish that can effectively achieve both purposes. It relates to the structure of the nest block.

[0002]

2. Description of the Related Art Conventionally, as a means of solidifying a revetment in a river, gravel stones are laid on the bottom of the river along the revetment, concrete blocks such as Tetrapot (registered trademark) are laid, or concrete is solidified by concrete. It was done in such a way that it would end up. In the case of abandoned stones, there is no particular problem as a nesting or hiding place for river fish, but if the abandoned stones are small, they will be washed away at the time of flooding, and since a large amount of natural stones will be used, resource depletion and natural environment Destruction is becoming a social problem, and there is an urgent need in the industry for alternative alternatives. When using a concrete block such as Tetrapot (registered trademark), it is difficult and dangerous to walk on it, so in a relatively large river, children etc. can play in the river or fish in the river. It is used only in places where people don't do things and the aesthetics of the surroundings don't matter so much, and such a place limitation has been a major drawback. The method of consolidating the bottom of the river with concrete is considered to be one of the causes of destroying the natural environment because there are no nesting places or hiding places for river fish, and it is rarely practiced today.

[0003]

[Problems to be Solved by the Invention] This invention was made in order to solve the drawbacks and problems described in the prior art, and it is possible to provide a nesting place and a hiding place for river fish at the same time as hardening the revetment. Moreover, the purpose of the present invention is to provide a naturally-friendly fish nest block on which children and others can enjoy playing in water and fishing.

[0004]

[Means for Solving the Problems] The outer side of the four corners of a quadrangular prism having a cavity therein is cut out substantially vertically, and a taper portion inclined inward is provided at the upper part of the concrete block having a flat top. Inverted U-shaped notch and tape along the ridgeline on the wall
A through hole that is inclined inward is provided in the pad portion.

[0005]

[Function] A river fish can be used as a nesting place or hiding place because it can freely enter and exit from the U-shaped notch and the taper part along the ridgeline through the through hole inclined downward inward. it can. A plurality of fish nest blocks are spread on the bottom of the river for root consolidation, but since there is a taper at the top, the fluid resistance becomes small and the flow of water becomes smooth. Moreover, since the top is flat, it is easy to walk and is suitable as a place for children to play in the river or fishing. Also, because it is installed smoothly on the bottom of the river, it looks beautiful and fits well with the surrounding environment.

[0006] At the time of increasing water, the earth and sand entering the cavity through the inverted U-shaped notch is swept up by the Zet water flow that is vigorously ejected from the through hole inclined downward inward toward the cavity, and is pushed out of the cavity. Inward deposition is suppressed. Also, since the outsides of the four corners are cut out almost vertically, the fluid resistance becomes small, the flow becomes smooth, and
It gives a soft appearance, is in harmony with the natural environment, and gives peace of mind.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings showing an embodiment of the present invention, the outside of the four corners of a quadrangular prism having a cavity 1 formed therein is cut out substantially vertically, and a taper portion 2 inclined inward is formed at the upper portion. The inverted U-shaped notch 4 and the taper portion 5 along the ridge line are provided with through holes 6 which are inclined downward inward on the four wall surfaces of the concrete block having the flat top portion 3. In addition, the average weight of one root block used for river construction is about 2 tons. In order to facilitate walking on the fish nest block, it is preferable to make the top portion 3 rough so as not to slip. In addition, it is preferable to suspend palm leaves and the like in the cavity 1 as a place where river fish lay eggs.

In practice, as shown in FIG. 4, a plurality of fish nest blocks are installed at the river bottom along the seawall 7,
The individual fish nest blocks are connected to each other by hooking a shackle 9 or the like on a hook embedded at one end of the taper portion. In addition, it is free to draw a pattern or a color on the flat top in harmony with the surrounding environment.
The shape of the inverted U-shaped notch 4 is not particularly limited.
The inclination of the through-hole 6 has an effect of suppressing sedimentation of the sediment in the cavity, and therefore is necessary, but the inclination angle can be selected as an optimum angle depending on the flowing speed and direction of the installation place.

[0008]

[Effect] Since this device is constructed as described above,
It has the following effects.

Since the laying work is simpler and can be performed uniformly as compared with the conventional waste stones, concrete blocks, etc., even an amateur can lay a stable quality root, that is, a fish nest block. In addition, this can make up for the serious shortage of skilled workers at the construction site, and thus has a high social contribution.

[0010] Since it has the function of solidifying the revetment and as a nest of fish, and finishing it in a shape that suppresses the fluid resistance to a small extent, making the flow smooth and having a flat top, it is easy to walk and is suitable for children and the like. It is a perfect place to play in the river.

Since the cavity has a structure that is difficult to be buried in the earth and sand, it is an optimal nesting place for river fish and provides an environment in which river fish can easily breed. As a result, nature can be revived and you can expect a rich and rich life.

Since it has a soft shape with no corners,
It is in harmony with the natural environment and gives the residents of the area peace and peace. Further, it is more effective to draw a pattern or a color on the flat top so as to match the surrounding environment. The present application has various remarkable effects as described above, and its industrial utility value is high.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the invention.

FIG. 2 is a sectional view taken along line AA in FIG.

3 is a sectional view taken along line BB in FIG.

FIG. 4 is an explanatory diagram showing a usage example.

[Explanation of symbols]

 1 cavity 2 taper part 3 top part 4 inverted U-shaped notch 5 taper part along ridge line 6 through hole inclined inward and downward 7 revetment 8 shackle

Claims (1)

[Scope of utility model registration request] 1. A quadrangular prism having a cavity (1) inside is notched substantially vertically outside the four corners, and a taper portion (2) inclined inward is provided in the upper portion, and a top portion (3) is flat. Through-holes (6) inclined inward and downward in the taper part (5) along the inverted U-shaped notch (4) and the ridgeline on the four wall surfaces of the concrete block.
A fish nest block characterized by the provision of.