JPH08140521A - Artificial fish gathering bank - Google Patents

Abstract

PURPOSE: To provide an artificial fish gathering bank, comprising a specific constitution for admitting many housings made of steel into a frame, having a high strength, hardly being damaged even when struck against a rock, etc., in the sea bottom, good in rooting of seaweeds due to its neutrality and suitable for especially egg laying by an octopus. CONSTITUTION: This artificial fish gathering bank is obtained by initially forming a cylindrical main body 1 having both opened ends and an inlet 3 of a trapezoidal cross section formed at one end 2 and fixing parts 5 arranged for a frame 4 of cast iron by casting, further integrally forming an end plate 7 having a short cylindrical part 6, plural through-holes 9 and a lid fixing part 10 of cast iron by casting, providing a lid unit 8, then fitting the lid unit 8 into the other end of the cylindrical main body 1 so as to enable the free installation and removal, forming housings 11, admitting the plural housings into a frame, fixing the housings with the fixing parts 5 and lid fixing parts 10 and then hanging the frame containing the housings 11 therein with hangers installed in four corners of the frame and settling the frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial fish reef that is used by sinking to the seabed. More specifically, it mainly relates to an artificial fish reef used for spawning octopus.

[0002]

2. Description of the Related Art Conventionally, artificial fish reefs mainly used for spawning octopus as described above are publicly known, and although not shown, they are generally formed of the following materials. 1. Ceramic artificial fish reef 2. Concrete artificial fish reef 3. Steel pipe artificial fish reef

[0003]

However, the various artificial fish reefs described above each have the following drawbacks. (1) Ceramic artificial fish reefs have low strength and are easily damaged by rocks on the sea floor. (2) The artificial artificial reef made of concrete is alkaline and has a strong alkaline component, so that rooting of seaweed such as kelp and seaweed is poor. Since octopus generally lays eggs in the dents of rocky reefs, crevices, or in jars that have been placed on the seabed, the artificial octopus is used to create an environment in which nearby abalone, sea urchins, and shrimp, which are favorite octopus, live. The quality of rooting of seaweeds on fish reefs is an important issue, and in this respect, the concrete artificial fish reefs with poor rooting have a drawback. (3) The artificial reef made of steel pipe has good rooting of seaweeds such as kelp and seaweed on its oxidized and corroded surface, but since the steel pipe is manufactured as a drawn steel pipe, the metal structure is layered. When the pipe body is oxidized and corroded, the seaweed root movement is caused by the wave of the rooted seaweed and the force of the wave itself causes the oxidized and corroded surface of the steel pipe to be easily separated into layers and flakes. Therefore, it has a drawback that it is easily separated from the tubular body. This is because when the steel pipe is manufactured, it is manufactured as a drawn steel pipe or as an electric resistance welded steel pipe from a steel plate as described above, and therefore, a metal structure is formed in layers during the manufacturing. Due to this layered state, the oxidized and corroded surface is likely to be peeled off in a layered and flaky form. In general, artificial fish reefs for spawning octopuses are formed by welding a number of housings to a frame, but in that case, the steel pipe housings, frames, etc. are likely to cause dimensional imbalance due to distortion, Is difficult and the assembly is troublesome. Further, since it is formed from a steel pipe, the degree of freedom of the shape is extremely small, and it is difficult to form an optimum structure for the octopus to protect itself from external enemies.
The present invention has been made to solve the above problems, and an object thereof is to provide an artificial fish reef mainly used for spawning octopus, which has high strength and is not easily damaged even when hitting rocks on the seabed. It is to be.

Another purpose is to lay eggs mainly of octopuses, which are not alkaline like concrete fish reefs, are neutral, and therefore have good rooting of seaweeds such as kelp and seaweed on their oxidized and corroded ones. The purpose is to provide artificial reefs for fishing.

Still another object is that seaweed rooted on an oxidized or corroded surface such as a steel pipe is peeled off together with the seaweed in a layered and flake form due to the movement of the wave and the force of the wave itself. It is an object of the present invention to provide an artificial fish reef, which is used mainly for spawning octopus and is capable of being strongly attached to seaweed without being destroyed. Another purpose is that the housing for housing the octopus does not require complicated adjustments to the frame because the housing has distortion as in the case of a conventional steel pipe during manufacturing, and the assembly to the frame requires adjustment. It is an object to provide an artificial fish reef mainly used for spawning octopus, which can be easily carried out without any need. Another object of the present invention is to provide an artificial fish reef mainly used for spawning octopus, which can be mass-produced extremely easily and can be manufactured at low cost, although it has a structure capable of resisting foreign enemies. Another object is to provide an artificial fish reef housing in which the octopus is inhabited, mainly for octopus spawning, in which the octopus can easily protect itself when an external enemy larger than the octopus is listening.

[0006]

The present invention which achieves the above object will be described. It is formed by casting on one end 2 of a tubular main body 1 which is made of cast iron and has open ends. An inlet 3 having a substantially trapezoidal cross section; a fixing part 5 provided on the main body 1 for the frame 4; fitted to the other side of the main body 1 so as to be attachable and detachable; Further, a lid body 8 integrally formed with a short cylinder portion 6 and an end plate 7 having a diameter larger than that of the short cylinder portion 6; a plurality of through holes 9 formed in the end plate 7; A housing 11 including a lid fixing portion 10 for the frame 4; a hanger 12 having a plurality of housings 11 fixed to the fixing portion 5 of the main body 1 and the lid fixing portion 10 of the lid body 8, respectively. Characterized by comprising a frame 4; That is an artificial reef.

The lid 8 is the artificial fish reef that is slidably fitted to the main body 1. The lid 8 is the artificial fish reef fitted into the main body 1 by screwing. Further, the entrance 3 is the artificial fish reef having a convex portion on the inner side and having an inclined portion 13 having an arc-shaped cross section. Further, the main body 1 is formed in a cylindrical shape, the entrance 3 is formed in a substantially truncated cone shape in cross section, and the short tubular portion 6 of the lid body 8 is the artificial fish reef formed in a cylindrical shape.

[0008]

Since the artificial fish reef of the present invention is constructed as described above, the artificial reef provided by sinking it into the seabed has a high strength and is less likely to be damaged by rocks on the seabed, and its oxidation and corrosion can be prevented. The product thus obtained is neutral rather than alkaline as seen in the conventional artificial fish reef made of concrete. Therefore, the rooting of seaweeds such as kelp and seaweed can be improved.

Next, since the artificial fish reef is made of cast iron by casting, its metallographic structure is uniform throughout, and it occurs when the drawn steel pipe is manufactured like the steel pipe artificial fish reef, or when the steel plate is electrically charged. Since the metal structure is not formed in layers, such as when sewing, the surface of seaweed roots such as kelp and wakame is layered and flaked due to the movement of waves such as kelp and wakame or the force of the waves themselves. It is possible to prevent the seaweeds from being removed by the above and dropping off together with them. Further, since the housing 11 has a frustoconical cross section at its entrance and is smaller than the main body 1, the octopus can protect itself from a large external enemy.

Further, since it is made of cast iron by casting, the fixing portion 5, the lid fixing portion 10 and the like can be integrally formed, and since welding is not required at the time of fish reef production, the housing is distorted due to welding such as a steel pipe. There is practically no imbalance in the dimensions of the housing, frame, etc. Therefore, no adjustment is required, and the frame can be mounted very easily. The one formed by a drawn steel pipe or the like has a large distortion because it is accompanied by welding when forming a fish reef, and thus has a large dimensional imbalance and requires a troublesome adjustment when a number of housings are attached to one frame.

The lid 8 that is slidably fitted to the main body 1 is a simple fitting type and can be manufactured very easily. Moreover, since the main body 1 and the lid body 8 are fitted and fixed to the frame 4, respectively, a solid structure can be obtained. Further, in the case where the lid body 8 is screwed to the main body 1, even if the frame 4 is damaged and is separated from the frame 4, it can independently perform the function of the housing. In addition, when the entrance 3 is formed so that the inside is convex and has the inclined portion 13 having an arcuate cross section, when a large external enemy checks the entrance of this housing, the internal octopus has the above convex shape. You can move the body backward by pushing the convex part, and because the convex part pushed by the octopus is at a distance from the entrance, external enemies can not do damage to the pushing part as described above. . Moreover, such a structure can be formed extremely easily because it is made by casting instead of forming the steel pipe and the like by a complicated process, and can be easily mass-produced. Also, the main body 1 is formed in a cylindrical shape,
Since the entrance 3 is formed in a substantially truncated cone shape in cross section and the short tubular portion 6 of the lid 8 is formed in a cylindrical shape, the strength in the diametrical direction can be maximized.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 11 in FIG. 1 is a housing of an artificial fish reef, which is formed mainly for laying octopus eggs, and is a main body 1 formed by casting using cast iron.
And a lid 8 which is also formed by casting using cast iron. The main body 1 is formed in a cylindrical shape or a rectangular tube shape (not shown) with both ends open, and an inlet 3 having a substantially frustoconical cross section is formed at one end 2 thereof. The entrance 3 is formed to have a size capable of containing an octopus. Reference numeral 5 denotes a fixing portion for mounting a large number of housings 11 on the frame 4 as shown in FIGS. 4 to 6, which is composed of bolt holes 16 formed in the supporting member 15 as an example.

Next, 8 is the lid as described above, and is composed of the short tubular portion 6 and the brim-shaped end plate 7 made of cast iron which is integrally cast. Since the short tubular portion 6 is fitted into the opening 17 of the main body 1, the short tubular portion 6 is formed in a cylindrical shape when the main body 1 is a cylinder and in a square tubular shape when the main body 1 is a square tube. The short tubular portion 6 is formed to have a smaller diameter than the main body 1, but the short tubular portion 6 is formed to have a larger diameter than the main body 1,
It may be fitted by sliding. 1 and 2, the lid 8 is slidably fitted. Reference numeral 9 denotes a through hole formed in the end plate 7 of the lid body 8 through which seawater passes. A plurality of holes 9 are formed along the outer circumference of the end plate 7, and one hole is also formed in the central portion. This allows seawater to circulate in the housing 11 and enhance the occupancy of the octopus.

Next, in FIGS. 4 to 6, the frame 4 is formed in the shape of a truncated cone, and a large number of the housings 11 are accommodated and fixed in upper and lower two stages. This fixing is fixed to the holding portion 19 of the frame 4 by the bolt nuts 18 for both the main body 1 and the lid 8 for the sake of easy understanding in FIG. 6, and therefore the short tubular portion 6 is simply slid to fit. Despite this, both 1 and 8 can be firmly fixed. The housing 11 is provided more in the lower stage than in the upper stage with respect to the frame 4, and is formed in a substantially trapezoidal shape, and the hanger 12 is provided at each of the four corners at the upper end to ensure stability, and the housing 11 is suspended in a substantially horizontal state in the sea. ,
It can be allowed to settle. Further, as shown in FIG. 5, the housing 11 is formed to be heavier on the rear side with respect to the frame 4 by the lid 8, but the front and rear can be balanced by providing the entrance 3 outside the frame 4. It is like this.

This artificial fish reef constructed as described above is lowered to the seabed by means of four hangers 12 by means of wires or the like (not shown) and is fixed by weights or fixing chains, wires or the like provided on the seabed, mainly octopus. Be used for spawning. The octopus is generally cave-in, so that it enters the housing 11 through the entrance 3 and lives there. Spawning is performed on this artificial fish reef as described above, and when seaweed or the like grows on this artificial fish reef, it can be expected that octopus favorite abalone, sea urchin and shrimp will settle there.

[0016]

The artificial fish reef of the present invention, which is constructed as described above, has a large strength and is less likely to be damaged by rocks on the seabed, and is oxidized. The corroded material is neutral rather than alkaline as seen in the conventional artificial fish reef made of concrete. Therefore, the rooting of seaweeds such as kelp and seaweed can be improved. Next, since the artificial fish reef is manufactured by cast iron by casting, its metal structure is uniform throughout, and it occurs at the time of drawing steel pipe production like the steel pipe artificial fish reef, or by electric resistance welding of steel plates. , Because the metal structure is not formed in layers,
Seaweed roots such as kelp and seaweed are layered by the movement of the seaweed or the power of the wave itself, such as kelp and seaweed.
It is possible to prevent the seaweeds from being removed in the form of flakes and dropping off with them. Further, the housing 11 has its entrance formed in a truncated cone shape,
By making it smaller, the octopus can protect itself from large external enemies. Further, since it is made of cast iron by casting, the fixing portion 5 for fixing to the frame, the lid fixing portion 10 and the like are integrally formed by casting. Therefore, when it is attached to the frame 4, it is made of steel pipe. Since there is no need for welding, there is no imbalance in the dimensions of each part due to the distortion that occurs during welding, and therefore the frame can be mounted extremely easily without adjustment.
The one formed by the drawn steel pipe or the like is attached to the frame by welding because it does not have the fixing portion 5, the lid fixing portion 10 and the like unlike the one according to the present invention, but due to the distortion generated at that time, the imbalance of the dimensions is large and many Troublesome adjustment is required when mounting the housing of the to one frame. In addition, the lid 8 that is slidably fitted to the main body 1 is a simple fitting type and can be manufactured very easily. Moreover, since the main body 1 and the lid body 8 are fitted and fixed to the frame 4, respectively, a solid structure can be obtained. Further, in the case where the lid body 8 is screwed to the main body 1, even if the frame 4 is damaged and is separated from the frame 4, it can independently perform the function of the housing. In addition, when the entrance 3 is formed so that the inside is convex and has the inclined portion 13 having an arcuate cross section, when a large external enemy checks the entrance of this housing, the internal octopus has the above convex shape. You can move the body backward by pushing the convex part, and because the convex part pushed by the octopus is at a distance from the entrance, external enemies can not do damage to the pushing part as described above. . Moreover, such a structure can be formed extremely easily because it is made by casting instead of forming the steel pipe and the like by a complicated process, and can be easily mass-produced. Further, the main body 1 is formed in a cylindrical shape, the inlet 3 is formed in a substantially truncated cone shape in cross section, and the short tubular portion 6 of the lid 8 is formed in a cylindrical shape, so that the strength in the diameter direction is maximized. it can.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a portion of an artificial fish reef showing an embodiment of the present invention.

FIG. 2 is likewise an exploded perspective view of a portion of an artificial fish reef.

FIG. 3 is a front view of a portion of the device shown in FIG.

FIG. 4 is a front view of an artificial fish reef showing an embodiment of the present invention.

FIG. 5 is likewise a plan view of an artificial fish reef.

6 is a cross-sectional view taken along the line AA in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 End part 3 Entrance 4 Frame 5 Fixing part 6 Short tube part 7 End plate 8 Lid body 9 Through hole 10 Lid fixing part 11 Housing 12 Hanger 13 Inclined part

Claims (5)

[Claims] 1. Formed by cast iron by casting,
An inlet 3 having a substantially trapezoidal cross section formed at one end 2 of a tubular main body 1 having both ends open; a fixing portion 5 provided on the main body 1 for a frame 4; and fitted on the other side of the main body 1. Lid body 8 integrally formed by casting and formed of cast iron so as to be attachable / detachable and integrally formed with an end plate 7 having a diameter larger than that of the short tube portion 6; A plurality of through holes 9 formed in the plate 7; a housing 11 formed in the end plate 7 and including a lid fixing portion 10 for the frame 4; and a hanger 12 that accommodates and fixes a plurality of the housings 11 An artificial fish reef characterized by comprising a frame 4; 2. The artificial fish reef according to claim 1, wherein the lid 8 is slidably fitted to the main body 1. 3. The artificial fish reef according to claim 1, wherein the lid 8 is fitted to the main body 1 by screwing. 4. The artificial fish reef according to claim 1, 2 or 3, wherein the inlet 3 is formed to have an inwardly convex inclined portion 13 having an arcuate cross section. 5. The main body 1 is formed in a cylindrical shape, the entrance 3 is formed in a substantially truncated cone shape in cross section, and the short tubular portion 6 of the lid 8 is formed in a cylindrical shape. Or the artificial reef according to 4.