JPS63251027A - Steel box frame for artificial fish bank - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a steel essence for artificial reefs 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, and left and right ridges are connected to H-shapes placed at the four corners. A cube-shaped frame is assembled by connecting the sides of steel columns with connecting fittings and multiple bolts and nuts (for example,
271N Publication), and in the same way as above, both ends of a beam made of H-shaped steel are butted against the sides of a rod made of H-shaped steel, and the butted parts are welded to assemble a cubic framework. (For example, Japanese Utility Model Publication No. 58-53977) is known.

However, in the former method of connection using bolts, the threaded part of the bolt itself is susceptible to corrosion, and the bolt insertion holes provided in the base material such as beams and columns are also prone to corrosion, and this corrosion causes the base material and bolts to be easily corroded. They become thin or thin, have poor durability, become rattled when used for long periods of time, and are at risk of disintegrating due to tidal currents.

In addition, in the latter case, in the conventional welding method, H-beam steels are simply welded by butting each other at their end faces and sides, so the welding line follows the shape of the end face of the H-beam steel, which is extremely complicated. At the same time, beveling of the end face is required for butt welding, and when welding, welding must be performed not only downward horizontally, but also vertically horizontally from the outside and inside of the frame, and horizontally upward from the bottom. Welding must be performed from a variety of angles such as directions, resulting in very poor work efficiency. For this reason, if welding and assembly is relied on on-site, it takes a lot of time and welding tends to be sloppy, resulting in a lack of welding reliability.

The conventional method for this purpose is to weld and assemble steel box frames at an assembly factory, then transport them by truck to the site, where they are filled with stones and then submerged using a crane ship. . However, when transporting a 14-piece box frame pre-assembled at a factory in this way, the size of each reef is limited due to the loading capacity, and the ribs that require a large reef are divided into smaller pieces and made into multiple pieces. It is necessary to manufacture the parts individually, which results in an increase in the number of parts, an increase in the total mfM, an increase in the amount of welding, etc., resulting in a problem of increased costs.

(Purpose of the Invention) The present invention has been made to solve these problems, and it reduces corrosion and improves durability unlike the bolted connection structure, and also uses a welding method.
The workability of welding has been improved, welding can be performed easily and efficiently on site, the work time can be significantly shortened, and even large fish reefs can be transported without bulk in the unassembled state, and can be assembled on site. The object of the present invention is to provide a wAtJ box frame for an artificial fish reef, which can reduce the number of parts, reduce the total weight, and reduce the amount of welding, thereby significantly reducing costs.

(Structure of the Invention) The present invention includes an upper frame body and a lower frame body formed into a planar polygonal shape by a plurality of steel cable members, and a plurality of steel column members arranged between upper and lower beam members. A steel box frame in which a polyhedral frame is constructed, and a screen material is stretched on each surface of the frame except for the top surface, and at the joints of each beam material of the upper frame body and the lower frame body. A supporting notch is formed on the upper surface of the end of one beam, and a large flange for joining is provided on the upper surface of the notch, and a supported notch is formed on the lower surface of the end of the other beam. A small flange for joining is provided on the lower surface of the notch, and with the small flange placed on the large flange, the edge of the small flange is welded to the upper surface of the large flange. This is characterized by the fact that both beam members are joined together.

With this configuration, most of the welding between each beam material and the welding between each beam material and column material can be easily performed as fillet welding in the horizontal direction in a downward position, improving workability during welding and allowing operators to In addition to reducing fatigue to zero, it is possible to improve the efficiency and shorten the time of on-site welding work, and even large artificial fish reefs can be transported in an unassembled state and easily welded and assembled on-site, reducing the number of parts. etc., it is possible to reduce costs.

(Example) In FIGS. 1 to 4, the upper front beam 1a and rear beam 1b and the lower left beam 2C and right beam 2d have the same structure, and the upper and lower flange portions 11. It is constructed of an H-shaped steel with an I-beam 13 between 12 and 12, and is supported by having the upper flange portion 11 and the upper half of the web 13 cut out in an L-shape at both ends in the longitudinal direction, as shown in FIG. Notch 14
are formed, and a large flange member 15 is fixed to the upper surface of each support notch 14.

A slit 16 that is continuous with the upper surface of the support notch 14 is formed at the end of the web 13, and when the center of the inner end of the large flange material 15 is engaged with the slit 16, the lower surface of the large flange material 15 is is fixed to the web 13 by welding. Further, the width W1 of the large flange material 15 is larger than the width W1 of the upper and lower flange parts 11°12, and the length Ll is larger than the sum of the length Qn of the slit 16 and the length Q12 of the notch 14. The mounting is done so that both sides of the large flange material 15 protrude from both sides of the upper and lower seven flange parts 11 and 12 when viewed from above, and the tip of the large flange material 15 protrudes from the tip of the web 13. has been done. 1
7 is a set plate for reinforcing the large flange material 15, and corresponds to the web 23 of the beam material, which will be described later, to be joined on the large flange material 15 between the large flange material 15 and the lower 7 flange portion 12. It is placed in the location where it is attached and fixed by welding.

On the other hand, the lower ship part beam 2a and the rear beam 2b and the upper left side beam 2C and right side beam 2d have the same structure, and have seven upper and lower flange portions 21. G) It is constructed of a section steel with a web 23 between the sections 22. However, each of the beams 2a to 2d has an L-shaped notch at both ends in the longitudinal direction, as shown in FIG. 2, contrary to the beams 1a to 1d. A supported notch 24 is formed, and a small flange member 25 is fixed to the lower surface of each supported notch 24.

Further, a slit 26 that is continuous with the lower surface of the notch 24 is formed at the end of the web 23, and when the center of the inner end of the small flange material 25 is engaged with the slit 26, the upper part of the small flange material 25 is Two sides are fixed to the web 23 by welding. The width W2 of the small flange material 25 is the same as the width W2 of the upper and lower flange parts 21°22, and
The length L2 is the same as the sum of the length Ω21 of the slit 26 and the length Ω22 of the notch 24. Therefore, in the plan view of the mounting state, both sides of the small flange material 25 and the top and bottom sides of the 7 flange parts 21 and 22 and the web 2
It is designed so that it does not protrude beyond the tip of 3. Reference numeral 27 denotes a gusset plate for reinforcing the small flange material 26, which is placed between the small flange material 25 and the lower flange portion 12 at a location corresponding to the web 13 of the beam materials 1a to 1d described above, and is fixed by welding. has been done.

The intermediate beam material 3 has a web 3 between the upper and lower 7 langes 31 and 32.
3, the above-mentioned beam materials 1a to 1d and 2a to
It is formed of an H-shaped steel larger (higher) than 2d, and a support notch 34 and a seven-lunge member 35 similar to the beam members 2a to 2d described above are provided at both ends thereof. This intermediate beam member 3 may or may not be provided with a gusset plate.

4 is the grating that becomes the screen material on the bottom, and the cross section! A plurality of single members 4 made of shaped steel plates or flat steel plates, etc.
1 and a plurality of auxiliary members 42 formed by twisting square steel bars or the like are joined in a grid pattern, and side frames 43 made of flat steel plates, L-beams, square pipes, etc. are fixed to both ends of the grating in the width direction. and configured.

Reference numerals 5 and 51 indicate main pillars arranged at the four corners, and intermediate pillars 51 are arranged between the main pillars 5.These pillars 5゜51 are usually formed of square steel pipes, but round It may be formed from a frame material such as a shaped steel pipe, H-shaped steel, Q-shaped steel, or L-shaped steel. 6
is the screen material for the circumferential surface, and is usually made of shaped steel.

Each of the beams 1a to 1d and 2a to 2d, the intermediate beam 3,
The bottom screen material 4, each of the pillar materials 5 and 51, and the peripheral screen material 6 are each molded into the predetermined dimensions and shapes at the factory as described above, and these members are transported to the site by truck, etc., and then It can be assembled as follows.

First, in the lower part, the lower frame is assembled by joining both ends of the front beam members 2a and 2b between the front end portions and rear end portions of the left and right beam members 1c and 1d, respectively.

That is, the small flange material 25 provided at the end of the other beam 2a, 2b is placed on the large flange material 15 provided at the end of one of the beams 1c, 1d, and the small flange material 25 is The large flange material 16 is arranged so that its side edges and tip edges are located inward from the tip edge and side edges of the large flange material 16. At this time, the gusset plates 17 and 2o of one beam
The positioning can be easily performed by adjusting the webs 23 and 13 of the other beam member so that they are aligned in the vertical direction. Next, on the upper surface of the large flange material 15 protruding from the small flange portion 25, the small flange material 2
The side edges and tip edges of 5 are welded to the upper surface of the large flange material 15. This allows fillet welding to be performed in a horizontal direction in a downward position, reducing operator fatigue, facilitating welding, and improving work efficiency.

In this way, the lower left and right beams 1c, 1d and the front and rear beams 2'
The ends of the beams 2a and 2b are joined by welding to assemble a rectangular planar lower frame, and then both ends of the intermediate beam 3 are hung between the front and rear beams 2a and 2b, and both ends are connected to each other. A predetermined lower frame body is assembled by joining the upper surfaces of the beam members 2a and 2b by welding. In this case as well, fillet welding is performed in a horizontal direction in a downward position, which reduces worker fatigue, facilitates welding, and improves work efficiency.

During or after assembling the lower frame, a grating 4 as a bottom screen material is fitted between the intermediate beam 3 and the left and right beams 1C and Id, and the surrounding area is connected to each beam IC.
, 1d, 2a, 2b, 34: Fixed by welding.

On the other hand, the upper ends of the pillar materials 5 and 51 are welded in advance to the lower surfaces of the upper beam materials 1a, ib and 2C12d.

At this time, with the beams ia, 1b, 2c, and 2d upside down, the pillars 5 and 5 are placed on their upper surfaces (original lower surfaces).
After welding the lower ends of 1 (original upper ends) to integrate them, turn them upside down and return to the original state. In this way, fillet welding in the horizontal direction can be performed in a downward position during welding, and work efficiency can be improved.

After that, on the beams 2a and 2b on the front and rear of the lower frame,
Each column member 5 joined to the lower surface of the upper front and rear beam members 1a, 1b
and 51 are placed and joined by welding. In this case as well, it can be easily joined by horizontal fillet welding in a downward position.

Next, on the left and right beam members 1c and 1d of the lower frame,
Each column material 5 joined to the lower surface of the upper left and right beam members 2c and 2d
and 51, and the small flanges 25 provided at both ends of the left and right beams 2c, 2d are placed on the large flanges 1 provided at both ends of the upper front and rear beams 1a, lb.
5, and the lower ends of each column material 5.51 are joined by welding to the upper surfaces of the left and right beam materials 1C91d of the lower frame body, and each flange material 25.15 is joined by welding. Assemble the cube-shaped framework. In this case as well, it can be easily joined by fillet welding in the horizontal direction in the downward position in the same manner as above.

Thereafter, on the circumferential surface, an angle material as a circumferential screen material 6 (omitted in Fig. 1) is joined by welding so as to span between each pillar material 5.51, thereby forming a prescribed steel box frame for an artificial fish reef. After assembling A and packing a large number of stones B into this steel box frame A, it is sunk into the seabed using a crane ship or the like. In this case, if necessary, the upper surface of the upper frame, for example, the beam members 2c, 2
A locking tool 7 for a sling is provided protruding from the upper surface of d.

Other examples above! The order of assembling the Ill box frame A is not limited to the order of the above-mentioned embodiments, but can be arbitrarily selected depending on the local situation, operator's 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 3 may be provided between the beams 1a and 1b or between the beams 2a and 2d of the upper frame.

The screen material 4 on the bottom surface is not limited to grating, but may be made of a frame material such as a steel section, C section steel, or T1 section steel, or a steel pipe.

Each of the beams 1a to ld and 2a to 2d is divided into a plurality of pieces in the longitudinal direction, and these beams are connected to a large flange material and a small flange material in the same way as the joining method for a part of the corner shown in the above embodiments. They may also be joined in the longitudinal direction using.

In the above embodiment, the frame is cubic, but it may be formed into a polyhedral shape such as a triangular prism, a polygonal prism having a pentagonal shape or more.

(Effects of the Invention) As described above, the present invention can increase the joint area by welding each beam material together via the large flange material and the small flange material, and is less susceptible to corrosion than conventional connection means using bolts or the like. In addition to reducing the amount of welding, it also increases welding strength and greatly improves durability compared to conventional welding methods. Moreover, most of the welding of each beam material and the welding of each beam material and column material can be easily performed by horizontal fillet welding in a downward position.
Workability during welding can be greatly improved. Therefore, it is possible to improve the efficiency and shorten the time of welding work on site, and even large items can be easily transported and assembled on site without being bulky in the unassembled state. This makes it possible to reduce costs.

[Brief explanation of drawings]

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 longitudinal sectional view, and Fig. 4 is a perspective view showing an embodiment of the present invention.
The figure is a perspective view of the device in use. 1a to ld, 2a, 2d... Beam material, 4... Bottom screen material, 5... Pillar material, 14... Support notch, 15
... Large flange material, 24 ... Supported notch, 25.
...Small flange material.

Claims (1)

[Claims] 1. A polyhedral frame is composed of an upper frame and a lower frame formed in a planar polygonal shape by multiple steel beams, and multiple steel columns placed between the upper and lower beams. is,
A steel box frame in which screen material is stretched on each surface except the top surface of the frame, and at the joint of each beam material of the upper frame body and the lower frame body, the upper surface of the end of one beam material A supporting notch is formed on the upper surface of the notch, and a large joining flange is provided on the upper surface of the notch, and a supported notch is formed on the lower surface of the end of the other beam, and a small joining flange is provided on the lower surface of the notch. A small flange is placed on the large flange, and the edge of the small flange is welded to the upper surface of the large flange to join both beam members. Steel box frame for artificial reefs.