JP5334874B2 - Fish reef block, manufacturing method thereof, and pyramid type fish reef - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and inexpensively produce a fish bank having a simple structure, facilitating the assembly, and providing excellent whirlpool effects and shadow effects by utilizing shells. <P>SOLUTION: The fish bank block 200 includes a concrete block body 1 which has a polygonal prism shape and a cavity 2 in the inside, and of which the periphery faces are opened 4 while leaving the ridge lines in columnar 3 shapes, and a water-permeable shell-holding case 6 inserted and fixed in the block body 1 while storing the shells in the interior. The shell-holding case 6 has a polygonal lower frame body 7 inserted into the block body 1 from the opening 4 and capable of being fixed to the block body 1, a water-permeable basket 9 fitted in the lower frame body 7 and allowing the shells to be packed from an upper opening 8, and a water-permeable lid 10 covering the upper opening 8 of the water-permeable basket 9. The lower frame body 7 has engaging members 12 protruded outward from outside corner parts, fitting in the side-part pillars 3a of the block body 1 to restrict the movement in the horizontal direction, and put on the bottom part pillars 3b of the block body 1 to restrict the downward movement. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a fish reef block, a manufacturing method thereof, and a pyramid type fish reef.

  The present applicant has conventionally provided a pyramid type fish reef 100 as shown in FIGS. This pyramid type fish reef 100 basically has a block main body 1 having a polygonal prism shape made of concrete and having an inside which is a cavity 2 and whose peripheral surface (six surfaces) leaves a ridgeline in the shape of a pillar 3 to form an opening 4. It is assembled as a configuration. The block main body 1 is shown as a regular tetrahedron that is one of polygonal prism shapes, and the block main body 1 having such a regular tetrahedron and a plurality of regular tetrahedrons in a straight line (illustrated example). And 4) connected long block main bodies 1L. Then, by combining the long block main body 1L, for example, a bottom structure having a plane rectangular (b-shaped) space a is formed, and the block body 1 of the regular tetrahedron is combined on the top of the bottom structure. By fixing, the pyramid type fish reef 100 in which a required space a is formed in the inside and the circumferential direction is assembled. The block main body 1 and the long block main body 1L constituting the pyramid fish reef 100 are assembled by lifting them with a crane or the like and fastening them with bolts.

  The block main body 1 and the long block main body 1L made of concrete are excellent in strength. Therefore, the large pyramid type reef 100 can be easily manufactured by combining the block main body 1 and the long block main body 1L on the ground. The manufactured pyramid type fish reef 100 is transported to a target sea area by a carrier or the like, suspended by a crane or the like, and installed on the seabed.

  In the pyramid type fish reef 100, the block main body 1 having a pillar structure and the long block main body 1L provide a complex space, and useful fish species such as rockfish, Isaki, Hiramasa and Japanese flounder are gathered by the shadow effect and the eddy current effect. In addition, larvae such as mosquitoes, shrimp, shrimps, crabs, and other larvae such as small crustaceans attach to the block surface, and micro-animals become inhabited, so that juvenile fish such as the above fish can be collected. Therefore, there is an advantage that an important function will be exhibited as a breeding ground for useful fish species such as fry. In addition, when shells are used for artificial reefs, the surface area and internal space are increased, and a more complex space can be provided, such as polychaetes such as sea bream, ami, shrimp, and crabs, and small crustaceans. There is an advantage that the attached animal becomes easy to live and the effect of the artificial reef is expressed early.

  On the other hand, in areas that produce shellfish such as scallops, oysters, oysters and shellfish, when these shellfish are processed, a large amount of shells are generated as waste, and these shells are simply piled up and processed. The current situation is struggling.

  Therefore, various proposals have been made for constructing artificial reefs using such shells. For example, a cylindrical water-permeable net or case is filled with shells, and many nets or cases filled with shells are accommodated in a structure such as steel (see Patent Documents 1 and 2, etc.), Alternatively, a rectangular water-permeable case filled with a shell is attached to a structure such as steel (see Patent Document 3).

JP 2002-233265 A Japanese Patent Laid-Open No. 09-163894 JP 2001-346476 A

  However, the conventional artificial reef using shells is a method in which a net or case containing a shell is housed in a steel structure or attached to a structure. It is necessary to make the capacity small enough for the operator to carry, and the work of filling the shells into such nets and cases must be done manually, and therefore the work of filling the shells into many nets and cases is very In addition, it is very difficult to store and attach a large number of shell containers filled with shells to a steel structure, which makes it difficult to manufacture artificial reefs using shells. It took time and had the problem that manufacturing cost increased.

  Moreover, when manufacturing a large artificial reef, it is necessary to prepare a huge number of nets and cases filled with shells, and the steel structure for supporting these nets and cases is a large machine. When the mechanical strength is required, and the eddy current effect and the shadow effect are considered, the shape structure of the steel structure becomes complicated and the mechanical strength needs to be further increased. It had the problem of increasing significantly.

  The present invention has been made in view of the above-mentioned conventional problems, and has a simple structure and is easy to assemble, and a fish reef block that can easily and inexpensively produce a fish reef having excellent eddy current effect and shadow effect using a shell. And a manufacturing method thereof and a pyramid type fish reef.

The invention according to claim 1 is a block main body having a polygonal prism shape made of concrete, the inside of which is hollow and the peripheral surface is left leaving a ridgeline in a columnar shape, and a shell is accommodated inside the block main body. A reef block consisting of a water-permeable shell holding case to be inserted and fixed,
The shell holding case is inserted into the block main body from the space and has a polygonal lower frame that can be fixed to the block main body, and is fitted to the lower frame to fill the shell from the upper opening. And a water passage lid that covers the upper opening of the water passage,
The lower frame protrudes outward from a polygonal outer corner, and engages with an inner corner of a side column of the block main body to restrain lateral movement of the lower frame and at the bottom of the block main body. It is a fish reef block characterized by having a locking member that is placed on a pillar and restrains the lower frame body from moving downward.

  The invention according to claim 2 is characterized in that the lower frame body has frame body locking means for contacting the block main body to prevent the lower frame body from being lifted up. It is.

  The invention according to claim 3 is a fish reef block according to claim 1, further comprising anchoring means for fixing the water tank to the lower frame to prevent the water tank from floating. is there.

  The invention according to claim 4 is a fish reef block according to claim 1, further comprising lid locking means for fixing the water flow lid to the water flow trough to prevent the water flow lid from lifting. is there.

  The invention according to claim 5 is characterized in that the lower frame body and the water basin, and the water basin and the water permeable lid are fixed by bolts, or fixed by lashing or welding by a lashing tool. The fish reef block according to Item 1.

  The invention according to claim 6 is the fish reef block according to any one of claims 1 to 5, characterized in that the water ridge is filled with stones instead of shells.

  The invention according to claim 7 is the method for manufacturing the fish reef block according to claim 1, wherein the step of inclining the polygonal lower frame and inserting the lower frame into the cavity of the block body from the opening, Return to the horizontal position and engage the locking member at the outer corner with the inner corner of the side column of the block body and place it on the bottom column of the block body to move the lower frame horizontally and downward The step of restraining the movement of the water, the step of inserting the water basin into the cavity from the opening of the block body and fitting and installing it in the lower frame, and the filling of the water basin with the shell from the upper opening It is a manufacturing method of the fish reef block characterized by including a step and the step which covers an upper open port with a water lid.

  The invention according to claim 8 is a pyramid type fish reef constituted by assembling a plurality of fish reef blocks according to claims 1 to 6.

  In the present invention, the polygonal lower frame is inclined and inserted into the cavity of the block body from the opening, and the lower frame is returned to the horizontal position and the corner locking member is fitted inside the side column of the block body. The bottom frame is placed on the bottom column of the block body to restrain the movement of the lower frame in the horizontal direction and the downward movement, and the water basin is inserted into the cavity from the opening of the block body to lower the frame. Since the shell is supplied and filled from the upper opening into the water tank, and the upper opening is covered with a water lid, the work of installing the shell holding case on the block body is installed. It becomes very easy, and it is possible to reliably restrain and support the movement of the shell holding case by using the column shape of the block body, and it is easy to supply and fill the shell into the water trough Therefore, the reef block is manufactured easily and inexpensively. It can, therefore an excellent effect utilization of fish reef blocks with shells is promoted.

  Furthermore, by assembling a plurality of the above-mentioned fish reef blocks, there is an effect that a large pyramid type fish reef having mechanical strength and having an eddy current effect and a shadow effect can be easily manufactured.

It is a front view which shows an example of the block main body which comprises the fish reef block of this invention. It is an II-II direction arrow line view of FIG. It is a front view which shows an example of the water-permeable shell holding case which inserts and installs in the block main body of FIG. 1, and comprises the fish reef block of this invention. It is the top view which looked at FIG. 3 from the IV-IV direction. It is a front view which shows an example of the lower frame which comprises a shell holding case. FIG. 6 is a plan view of FIG. 5. It is explanatory drawing which shows the other example of a frame latching means. It is a front view which shows an example of the water trough which comprises a shell holding case. It is a top view of FIG. It is a top view which shows an example of the water flow lid which comprises a shell holding case. It is explanatory drawing which shows an example of a cover body latching means. It is a front view which shows the state which inserts a lower frame in a block main body. It is a front view which shows the state which puts back the lower frame inserted in the block main body horizontally, and fits an L-shaped locking member to the side column of a block main body, and installs it. It is a front view which shows the state which inserts a water trough and installs on a lower frame. It is a front view which shows the state in which the water conduit was installed on the lower frame. It is a front view which shows the state which fills a shell with a water passage. It is a front view which shows the state which comprised the reef block by inserting a water flow lid and installing on a water flow trough. It is a front view which shows the other Example of the fish reef block of this invention. (A) is a perspective view of the net | network which shows the other structural example of a water basin, (b) is a front view which shows the state which inserted the net | network in the water basin. It is a perspective view which shows an example of the pyramid type fish reef which the present applicant has already provided. It is the arrow line view which looked at FIG. 20 from the XXI-XXI direction. It is the arrow line view which looked at FIG. 20 from the XXII-XXII direction.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view showing an example of a block main body constituting the fish reef block of the present invention, and FIG. 2 is a view taken in the direction of arrows II-II in FIG. A regular tetrahedron is formed, the inside is a cavity 2, and the peripheral surface (six surfaces) leaves an edge line in the shape of a pillar 3 to form an opening 4. The block body 1 in FIG. 1 has a length of 1.5 meters on one side, for example, and the upper and lower openings 4 have a quadrangle as shown in FIG. 2, and the four-round openings 4 have a shape as shown in FIG. Haunches 5 (inclined surfaces) are formed at the four corners to increase the strength by increasing the cross-sectional area of each pillar 3. In addition, as shown in FIG. 2, each column 3 of the block body 1 has a space 4 that extends outward in order to improve mold removal when the block body 1 is casted into concrete. The cross section of the column 3 has an acute angle at the inner corner. In addition, the cross section of the pillar 3 may be a rectangle (right angle).

  FIG. 3 is a front view showing an example of a water-permeable (water-permeable) shell holding case 6 constituting the fish reef block 200 of the present invention by being inserted into the block body 1 and FIG. It is the top view seen from -IV direction.

  The shell holding case 6 includes a rectangular lower frame 7 that can be inserted into the block body 1 from the space 4 and can be fixed to the block body 1, and a shell from the upper opening 8 that fits into the lower frame 7. The water tank 9 is filled with the water tank 9 and the water cover 10 is fixed so as to cover the upper opening 8 of the water tank 9.

  As shown in FIGS. 3, 4, 5, and 6, the lower frame body 7 is formed in a rectangular shape smaller than the space 4 by an L-shaped angle member having an outer rising portion 11a and an inner horizontal portion 11b. An angle frame 11 is provided, and the four outer corners of the angle frame 11 have a planar L-shape and project outward, and as shown in FIG. 4, the inner corners of the side column 3a of the block body 1 The locking member 12 is provided so as to be fitted to the. This locking member 12 is formed of an L-shaped angle material, and an L-shape formed on one side of the L-shaped angle material is fitted to the inner corner of the side column 3a as shown in FIG. The lower frame body 7 is constrained so as not to move laterally with respect to the block body 1, and the other side of the L-shaped angle member is formed between the side column 3a and the bottom column 3b as shown in FIG. The lower frame 7 is constrained so that it cannot move downward by abutting against the haunch 5 formed at the boundary.

  In addition, as shown in FIGS. 5 and 6, a reinforcing member 13 made of an L-shaped angle material projects in a cross shape and outside the angle frame 11 at the intermediate position before and after the angle frame 11 and the intermediate position on the left and right. Furthermore, a plurality of net support members 14 made of round bars or the like are fixed on the horizontal portion 11b of the angle frame 11 and the reinforcing member 13 so as to intersect with each other at a predetermined interval. A bottom net 15 made of a plastic net or a metal net is fixed on the support member 14. Furthermore, as shown in FIG. 2, a spacer 16 having a lower end in contact with the upper surface of the bottom column 3b is fixed to each end of the cross-shaped reinforcing member 13 so as to receive a load. The lower frame 7 can be assembled integrally by welding or the like.

  Further, on the upper surface of the L-shaped locking member 12, a plate 18 with an opening 17 projecting upward is fixed, and a bolt 19 (FIG. 4) to be screwed into the opening 17 is provided. A frame body locking means 20 for preventing the lower frame body 7 from being lifted is configured by bringing the tip of the bolt 19 into contact with the inner corner of the side column 3 a of the block body 1. The frame locking means 20 may have a configuration as shown in FIG. 7 showing another example. The frame body locking means 20 of FIG. 7 is provided with a spring plate 18a fixed on the upper surface of the locking member 12 so that the upper end protrudes toward the side column 3a as indicated by a broken line. In the frame locking means 20 of FIG. 7, when the lower frame 7 is installed in the block body 1, the spring plate 18a indicated by the broken line is pushed and bent toward the lower frame 7 as indicated by the solid line. When the lower frame body 7 tries to float upward, the tip of the spring plate 18a is pressed against the inner corner of the side column 3a by the spring force so as to exert the action of the stopper. It has become.

  FIG. 8 is a front view of the water basin 9 and FIG. 9 is a plan view of FIG. 8. The water basin 9 includes an upper angle frame 21 formed in a quadrangular shape by an L-shaped angle material, and the upper angle frame 21. A corner member 22 made of an L-shaped angle member fixed so as to extend downward from the corner portion of the corner at a required length, and a round bar or the like intersect the inner side of the upper angle frame 21 and the corner member 22 at a required interval. 5 and a side net 24 made of a plastic net or a metal net fixed on the four inner sides of the net support 23. The frame 7 has a size that fits just inside the rising portion 11 a of the angle frame 11. The water basin 9 can be assembled as a single piece with a securing member such as a metal fitting or a wire rod.

  In the above embodiment, the bottom frame 15 is provided on the lower frame 7 and the side network 24 is provided on the four circumferences of the water basin 9. However, the bottom network 15 is provided on the lower frame 7. You may make it provide the container-shaped net | network which the upper part became the open port 8 in the water basin 9 without providing.

  A bolt hole 25 is provided at a position corresponding to the lower end of the corner member 22 of the water flow trough 9 and the rising portion 11a of the lower frame body 7 in FIG. 5, and a bolt 26 (FIG. 4) is provided in the bolt hole 25. Fixing means 27 is provided to prevent the water tank 9 from being lifted.

  FIG. 10 is a plan view of a water flow lid 10 provided so as to cover the opening 8 at the top of the water flow trough 9. The water flow lid 10 is further formed into a round bar by a round bar or the like. A net support member 28 fixed so as to intersect at a predetermined interval is provided, and an upper net 29 made of a plastic net or a metal net is integrally fixed to the net support member 28. The water flow lid 10 can be integrally assembled by welding or the like.

  Further, as shown in FIG. 9, bolt holes 30 are provided at positions corresponding to the net support member 28 of the water flow lid 10 of FIG. 10 in the corner portion and the middle portion of the upper angle frame 21 of the water flow trough 9. As shown in FIG. 11, the opening (not shown) of the fixing tool 31 hung on the net support member 28 is aligned with the bolt hole 30 and fixed through the bolt 32 to prevent the water cover 10 from being lifted. A lid locking means 33 is provided. Further, in order to prevent the water-flowing lid 10 from being lifted, it may be secured using a lashing material such as a metal fitting or a wire, or fixed by welding.

  The operation of the above embodiment will be described below.

  12-17 show the steps of the method of manufacturing the fish reef block 200 of the present invention.

  FIG. 12 shows a state in which the lower frame body 7 is inserted into the block body 1. Since the lower frame body 7 is provided with a locking member 12 that locks in the block main body 1 to restrain movement, and protrudes from the outer corner, it is larger than the left and right and vertical intervals of the opening 4. . For this reason, the lower frame 7 can be inserted into the cavity 2 from the opening 4 by being inclined so as to face the diagonal position of the opening 4.

  Subsequently, as shown in FIG. 13, the lower frame body 7 inserted into the cavity 2 is returned horizontally, and the L-shaped locking member 12 provided at the outer corner portion is connected to the inner corner of the side column 3 a of the block body 1. And is placed on the haunch 5 and the bottom column 3b of the block body 1. Thereby, the lower frame 7 is restrained from moving in the horizontal direction and moving downward. At this time, as shown in FIG. 4, a bolt 19 is screwed into the opening 17 of the plate 18 constituting the frame body locking means 20, and the tip of the bolt 19 is connected to the inner corner of the side column 3 a of the block body 1. The lower frame 7 is prevented from being lifted up by being brought into contact with.

  Subsequently, as shown in FIG. 14, the water basin 9 is inserted into the cavity 2 of the block body 1 from the upper opening 4 or the four-direction opening 4, and as shown in FIG. It is fitted and installed inside the angle frame 11 of the body 7. At this time, a bolt 26 (FIG. 4) is passed through a bolt hole 25 provided at a position where the lower end of the corner member 22 of the water trough 9 constituting the anchor locking means 27 and the rising portion 11a of the lower frame body 7 coincide. By fixing, the water tank 9 is prevented from floating. Subsequently, as shown in FIG. 16, the shell B is supplied and filled into the water trough 9 from the upper opening 8 using a loading machine A such as a wheel loader or a shovel car.

  Subsequently, as shown in FIG. 17, the water-permeable lid 10 is inserted into the cavity 2 of the block main body 1 from the upper opening 4 or the four-circumferential direction opening 4, and the water-permeable lid 10 is inserted into the opening 8 Install to cover. At this time, the fixing tool 31 constituting the lid locking means 33 in FIG. 11 is hung on the net support member 28, and an opening (not shown) of the fixing tool 31 is passed through the upper angle frame 21 of the water trough 9. By fixing the bolts 32 through the bolts 32 so as to coincide with 30 (FIG. 9), the water passage lid 10 is prevented from rising. Thereby, the fish reef block 200 of this invention is comprised.

  In addition, without providing the above-described hook locking means 27 and lid locking means 33, the lower frame body 7 and the water passage 9 are integrally fixed by welding, and the water passage 9 and the water passage 10 are fixed. And may be fixed together by welding.

  FIG. 18 shows another embodiment of the present invention, and shows a case where two-stage shell holding cases 6 and 6 ′ are provided in the cavity 2 of the block body 1. When installing the two-stage shell holding cases 6 and 6 ′ in the block body 1 as shown in FIG. 18, first, the lower frame body 7 is inclined and inserted into the cavity 2 from the opening 4 as described above. Subsequently, the lower frame body 7 is returned to the horizontal position, and the L-shaped locking member 12 provided at the outer corner is fitted to the inner corner of the side column 3 a of the block body 1. Subsequently, the lower frame body 7 ′ is similarly inclined and inserted into the cavity 2 from the opening 4 and returned to the horizontal position, and then the lower frame body 7 ′ is lifted upward and temporarily fixed to the inner upper portion of the block body 1. Keep it. In this state, the water basin 9 is inserted into the block main body 1 and fitted into the lower frame 7 and fixed in the same manner as described above, and the inside of the water basin 9 using the loading machine A as shown in FIG. A shell holding case 6 is configured by supplying and filling the shell B and inserting the water-permeable lid 10 into the block main body 1 and placing and fixing it on the water-basin 9. Next, the temporarily fixed lower frame 7 'is hung down, and the lower frame 7' is placed on the shell holding case 6 via the spacer 16 ', and then a water passage 9' is inserted into the lower frame. As shown in FIG. 16, the shell B is supplied and filled into the water basin 9 ′ using the loading machine A as shown in FIG. 16, and the water basin 10 ′ is further inserted into the water basin 9 ′. A shell holding case 6 'is formed by fixing it on top. As a result, a fish reef block 200 including a plurality of shell holding cases 6 and 6 ′ in the cavity 2 of the block body 1 can be configured.

  FIGS. 19 (a) and 19 (b) show another example of the structure of the water basin 9. As shown in FIG. 15, the water basin 9 inserted into the cavity 2 of the block body 1 is used as the lower frame. In a state of being fitted and installed inside the angle frame 11 of 7, the plastic flexible net having substantially the same width as one side of the rectangular internal space of the water trough 9 is cut to a required length, One cut net 34a is bent into a U shape as shown in FIG. 19 (a) and inserted into the water trough 9 in FIG. 19 (b), and then the other net 34b is bent into a U shape. And inserted in a direction 90 ° different from the mesh 34a. As a result, the bottom surface and the four circumferential surfaces of the water trough 9 shown in FIG. 19B are covered with the nets 34a and 34b. At this time, both ends of the nets 34 a and 34 b inserted into the water basin 9 are cut in advance to a length that can cover the upper surface of the water basin 9 by bending.

  Accordingly, after filling the shells to the same height as the water trough 9 with the nets 34a and 34b inserted into the water trough 9 as shown in FIG. 19 (b), before and after the other net 34b. Bend both ends of the net on the top surface of the water tank 9 and then fold down the left and right ends of one net as shown by the two-dot chain line, and tie the ends together with metal fittings or wire. Secure with material 35. As a result, the shell is encased by the nets 34a and 34b, and is prevented from floating.

  In addition, although the case where the block main body 1 shown in each of the above embodiments has a quadrangular columnar structure is illustrated, it may have a columnar structure such as a triangular column or a hexagonal column. The shell holding cases 6 and 6 ′ are also triangular or hexagonal so as to correspond to the block body 1.

  The block body 1 described above can be mass-produced by placing concrete, and the lower frame bodies 7 and 7 'constituting the shell holding cases 6 and 6', the water passages 9 and 9 ', and the water passage The lids 10 and 10 'can be mass-produced with the same dimensions.

  In addition, a plurality of the above-described fish reef blocks 200 can be assembled to form a pyramid type fish reef 100 as shown in FIG. 19, whereby a pyramid type fish reef having shell holding cases 6 and 6 ′ filled with shells. 100 can be manufactured at a low cost, and the adhesion and growth of seaweeds by shells can be promoted, and a pyramid type fish reef 100 excellent in eddy current effect and shadow effect can be provided.

  The fish reef block, the manufacturing method thereof, and the pyramid type fish reef of the present invention are not limited to the above-described embodiments, and various changes can be made without departing from the scope of the present invention. .

DESCRIPTION OF SYMBOLS 1 Block main body 1L Long block main body 2 Cavity 3 Column 3a Side column 3b Bottom column 4 Opening 6 Shell holding case 6 'Shell holding case 7 Lower frame 7' Lower frame 8 Opening port 9 Water passage 9 'Water passage DESCRIPTION OF SYMBOLS 10 Water cover 10 'Water cover 12 Locking member 20 Frame locking means 27 Coral locking means 33 Cover locking means 100 Pyramid fish reef 200 Fish reef block B Shell

Claims (8)

A block main body having a polygonal prism shape made of concrete, the inside of which is hollow and whose peripheral surface is left open in the form of a pillar, and a water permeable water which is inserted and fixed in the block main body while containing a shell. A reef block consisting of a shell holding case,
The shell holding case is inserted into the block main body from the space and has a polygonal lower frame that can be fixed to the block main body, and is fitted to the lower frame to fill the shell from the upper opening. And a water passage lid that covers the upper opening of the water passage,
The lower frame protrudes outward from a polygonal outer corner, and engages with an inner corner of a side column of the block main body to restrain lateral movement of the lower frame and at the bottom of the block main body. A fish reef block having a locking member placed on a pillar and restraining the downward movement of the lower frame.   2. The fish reef block according to claim 1, wherein the lower frame has a frame locking means for preventing the lower frame from being lifted by contacting the block main body.   The fish reef block according to claim 1, further comprising a hook locking means for fixing the water tank to the lower frame to prevent the water tank from floating.   2. The fish reef block according to claim 1, further comprising lid locking means for fixing the water flow lid to the water flow trough to prevent the water flow lid from being lifted.   2. The fish reef block according to claim 1, wherein the lower frame body and the water trough, and the water trough and the water lid are fixed by bolts or fixed by lashing or welding.   The fish reef block according to claim 1, wherein the water ridge is filled with stones instead of shells.   The method of manufacturing a fish reef block according to claim 1, wherein the step of inclining the polygonal lower frame body and inserting it into the cavity of the block body from the opening, and returning the lower frame body horizontally to the outer corner portion Engaging the locking member with the inner corner of the side column of the block body and placing it on the bottom column of the block body to restrain the lateral movement and the downward movement of the lower frame, Inserting the water basin into the cavity from the opening of the block body and fitting and installing it in the lower frame, supplying and filling the shell from the upper opening into the water basin, and passing through the upper opening A method for producing a fish reef block, comprising a step of covering with a water lid.   A pyramid type fish reef comprising a plurality of the fish reef blocks according to claim 1.

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