JPH0448695Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a steel box frame for an artificial fish reef used in the aquaculture breeding business to propagate shellfish such as abalone and fish such as spiny lobster. .

(Prior art) Conventionally, as a steel box frame for this type of artificial reef, both ends of beams made of H-beams placed at the top, bottom, front, back, left, and right ridges were replaced by H-beams placed at the four corners. A cube-shaped frame is assembled by joining the sides of pillars made of
-36273) is known.

However, in the above-mentioned conventional steel box frame, the screen material on the bottom is only formed of angle members arranged parallel to each other in one direction, and a long and narrow gap remains between each angle member. Therefore, when long and narrow stones are packed, there is a risk that the stones may fall out of the gap, and sufficient attention must be paid to the directionality when packing the stones, resulting in poor workability. In particular, although the screen material on the bottom is subject to a large load due to the stones packed in it, conventionally the middle part of the angle material has not been reinforced, so it is weak in strength and is susceptible to the load of stones. The angle material was deformed in a direction in which it spread, and this deformation caused the gap to become larger and there was a risk that the stone would fall out.

(Purpose of the invention) The present invention was made in order to solve such problems, and in particular, it easily equalizes the gap at the bottom, eliminates the need to consider the direction when packing stones, and improves the packing. Improve work efficiency, and
The purpose of the present invention is to provide a steel box frame for an artificial fish reef that can increase the strength of the bottom, prevent the bottom from falling out and deformation of the gap, and prevent stones from falling off.

(Structure of the invention) The present invention consists of a rectangular upper frame formed by joining front and rear, left and right beams made of shaped steel, and a rectangular upper frame formed by joining front and rear, left and right beams made of shaped steel. A rectangular parallelepiped-shaped frame is formed by a shaped lower frame body and pillars that connect the upper frame body and the lower frame body, and a screen material is stretched on each surface of this frame except at least the top surface. In the box frame, the bottom screen material includes a plurality of strip-shaped main members arranged parallel to each other in an upright state with the width direction being the vertical direction, and a plurality of bar-shaped auxiliary members arranged parallel to each other. The bottom screen material made of grating is connected in a state where it is supported by a support flange formed on the inner periphery of the lower frame. It is characterized by:

In this way, the frame is constructed from shaped steel, and the bottom screen material, which is especially loaded, has a lattice-like grating structure, and its peripheral part is supported and connected to the supporting flange formed on the inner periphery of the lower frame. As a result, the overall strength can be greatly increased, and during assembly on land, shipping, and sinking from a ship to the seabed, etc.
Even if the interior is filled with heavy stones, there is no risk of the bottom falling out or deforming the lattice-like gaps, preventing the stones from falling off, and ensuring that the artificial reef functions effectively for a long time. It can be demonstrated.

(Example) In Figures 1 to 4, the upper front beam 1
a and the rear beam 1b, and the lower left beam 2c and right beam 2d have the same structure and are composed of H-shaped steel with a web 13 between the upper and lower flange parts 11 and 12, and both longitudinal ends thereof As shown in FIG. 2, the upper flange portion 11 and the upper half of the web 13 are cut out in an L shape to form a supporting notch 14, and the upper surface of the supporting notch 14 is formed at the end of the web 13. A continuous slit 16 is formed,
With the center of the inner end of the large flange part 15, which is formed wider than the width of the upper and lower flange parts 11 and 12, engaged with the slit 16, the large flange material 1 is
The lower surface of 5 is fixed to web 13 by welding. As a result, both sides of the large flange material 15 are formed to protrude from both sides of the upper and lower flange parts 11 and 12 in plan view, and the tip of the large flange material 15 is formed to protrude from the tip of the web 13. . 17 is a gusset plate for reinforcing the large flange material 15.

On the other hand, the lower front beam 2a and rear beam 2b and the upper left beam 2c and right beam 2d have the same structure, and have upper and lower flange portions 21, 22 in the same manner as the beams 1a to 1d. It is constructed of H-shaped steel with a web 23 in between. However, each beam material 2a to 2d
At both ends in the longitudinal direction, each of the beam members 1a-
1d, as shown in FIG. 2, the lower flange portion 22 and the lower half of the web 23 are cut out in an L shape to form a supported notch 24, and the end of the web 23 is provided with a supporting notch 24. A continuous slit 26 is formed on the upper surface of the notch 24, and the upper and lower flange parts 21,
The lower surface of the small flange material 25 is fixed to the web 23 by welding, with the center of the inner end of the small flange material 25 formed to have the same width as the width of the small flange material 22 engaged with the slit 26. As a result, both sides and the tip of the small flange material 25 are connected to both sides and the web 23 of the upper and lower flange parts 21 and 22 in plan view.
It is designed so that it does not protrude beyond the tip. 27 is a gusset plate for reinforcing the small flange material 25.

The intermediate beam material 3 is an H-beam steel having a web 33 between the upper and lower flange portions 31 and 32, and is
It is formed of H-beam steel larger (higher) than d and 2a to 2d, and the beam members 2a to 2d are attached at both ends.
A supported notch 34 and a flange material 35 similar to the above are provided. This intermediate beam member 3 may or may not be provided with a gusset plate.

Reference numeral 4 denotes a grating that serves as a screen material on the bottom surface, and includes a plurality of main members 41 made of steel plates or flat steel plates with an I-shaped cross section, and a plurality of auxiliary members 42 made of twisted rectangular steel bars or the like. A side frame 43 made of a flat steel plate, L-shaped steel, square pipe material, or the like is fixed to both ends of the grating in the width direction.

5 is the main pillar material placed at the four corners, 51 is the main pillar material 5
These pillar materials 5 and 51 are usually formed of square steel pipes, but they can also be made of frames such as round steel pipes, H-shaped steel, C-shaped steel, L-shaped steel, etc. It may be made of material. Reference numeral 6 denotes a screen material for the circumferential surface, and L-beam steel is usually used.

Each of the above-mentioned beam materials 1a to 1d and 2a to 2d, intermediate beam material 3, bottom screen material 4, each pillar material 5 and 5
1. The peripheral screen material 6 is each molded into a predetermined size and shape at a factory as described above, and these members are transported to the site by truck or the like and assembled at the site in the following manner.

First, in the lower part, between the tips and rear ends of the left and right beams 1c, 1d, the front and rear beams 2a, 2
Assemble the lower frame by joining both ends of b. That is, the small flange material 25 provided at the end of the other beam material 2a, 2b is placed on the large flange material 15 provided at the end of the other beam material 1c, 1d, and the side of this small flange material 25 is placed. The large flange member 16 is arranged so that its edge and tip edge are located inward from the tip edge and side edges of the large flange material 16. Then, on the upper surface of the large flange material 15 protruding from the small flange portion 25, the side edges and the tip edge of the small flange material 25 are welded to the upper surface of the large flange material 15, thereby creating a lower frame having a rectangular planar shape. Assemble.

Next, both ends of the intermediate beam 3 are hung between the front and rear beams 2a, 2b, and both ends are connected to the respective beams 2a, 2b.
It is joined to the upper surface of 2b by welding.

Here, during or after assembling the lower frame, a grating 4 as a bottom screen material is fitted into the grooves formed inside each of the beam members 1c, 1d, 2a, 2b, and 3, and the grating 4 is 4 around each lower flange part 1
2, 22, and 32, their peripheral parts are fixed by welding.

On the other hand, each of the upper beam members 1a, 1b and 2c, 2
d is turned upside down and welded the lower ends (original upper ends) of pillars 5 and 51 to its upper surface (original lower surface) to integrate them in advance, then turned upside down and returned to the original state. , Then, on the front and rear beams 2a, 2b of the lower frame body, the upper and rear beams 1a,
The lower ends of the joined pillars 5 and 51 are placed on the lower surface of 1b and joined by welding.

Next, the left and right beam members 1c and 1d of the lower frame body are
The lower ends of the pillars 5, 51 joined to the lower surfaces of the upper left and right beams 2c, 2d are placed on top, and the small flanges 25 provided at both ends of the left and right beams 2c, 2d are placed on top. It is placed on the large flange members 15 provided at both ends of the upper front and rear beam members 1a and 1b, and the lower ends of each pillar member 5 and 51 are connected to the left and right beam members 1 of the lower frame body.
c, joined to the upper surface of 1d by welding,
A cubic frame is assembled by joining the flange materials 25, 15 together by welding. Then, on the circumferential surface of this frame, a circumferential screen material 6 (the first
A predetermined steel box frame A for an artificial reef is assembled by joining angle members (not shown in the figure) by welding. In addition, if necessary, the sling locking tool 7 may be attached to the upper surface of the upper frame, for example, the upper surface of the beams 2c, 2d.
Set it up. Further, when assembling the steel box frame A, all or most of it is welded by horizontal fillet welding in a downward position.

Thereafter, as shown in Fig. 5, a large number of stones B are packed into a steel box frame A, and then sunk into the seabed by a crane ship or the like. In this case, since the screen material 4 on the bottom is composed of a grid-like grating,
Since the uniform mesh-like gaps are formed as shown in FIG. 3, there is no need to consider the directionality when packing the stones B, and the stones can be packed as desired. In addition, by using grating 4, the strength is significantly increased compared to the conventional angle materials arranged in parallel in only one direction, and even if a large load is applied by packed stones, the bottom will not fall out or there will be no gaps. There is no risk of deformation, and there is no risk of stones falling out of the gaps.

Other Embodiments The order of assembling the steel box frame A is not limited to the order of the above embodiments, but can be arbitrarily selected depending on the local situation, operator preference, etc.

The number of intermediate beam members 3 is not limited to one, but two or more may be provided, or may be omitted. The intermediate beam material 3 is placed between the beam materials 1a and 1b of the upper frame body or between the beam materials 2a and 2d.
It may be provided in between.

The means for joining the beams 1a to 1d and 2a to 2d and the means for joining each beam and the column are not limited to the above embodiments, and any known method may be used.

(Effects of the invention) As described above, the invention consists of a frame made of shaped steel,
The bottom screen material, which is especially loaded, is made of a lattice-like structure consisting of a plurality of strip-shaped main members arranged parallel to each other in an upright state with the width direction being the vertical direction, and a plurality of bar-shaped auxiliary members arranged parallel to each other. The grating structure is made by criss-crossing and pressure-welding, and the peripheral part is supported and connected to the support flange formed on the inner periphery of the lower frame. The overall strength is significantly increased compared to arranging angle pieces parallel to each other in only one direction, making it possible to avoid heavy stones inside when assembling on land, shipping, or sinking from a ship to the seabed. Even when filled, there is no risk of the bottom falling out or the grid-like gaps being deformed, and the stones can be prevented from falling off, allowing the artificial reef to function effectively for a long period of time. In addition, there is no need to consider direction when packing stones, making handling easier.
This can improve workability and safety.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is an exploded perspective view of the joint between the beams, Fig. 3 is a plan view, Fig. 4 is a sectional view taken along the line - - of Fig. 3, Fifth
The figure is a perspective view of the device in use. 1a to 1d, 2a, 2d...Beam material, 4...Bottom screen material (grating), 5...Column material, 4
1... Main member of the grating material, 42... The auxiliary member, 43... The same end member.

Claims (1)

[Scope of utility model registration request] A rectangular upper frame formed by joining the front and left beams made of shaped steel, and the front and rear made of shaped steel,
A rectangular parallelepiped-shaped frame is formed by a rectangular lower frame formed by joining the left and right beam members, and pillars connecting the upper frame and the lower frame, and at least the upper surface of this frame is excluded. It is a steel box frame with screen material stretched on each side, and the bottom screen material is
A plurality of strip-shaped main members arranged parallel to each other in an upright state with the width direction being the vertical direction, and a plurality of bar-shaped auxiliary members arranged parallel to each other are intersected in a lattice shape and are pressure-welded together. A steel box frame for an artificial fish reef, which is composed of grating and is characterized in that the grating bottom screen material is supported and connected to a support part formed on the inner periphery of a lower frame body.