WO2013019089A2

WO2013019089A2 - Prefabricated building

Info

Publication number: WO2013019089A2
Application number: PCT/KR2012/006205
Authority: WO
Inventors: 탁승호
Original assignee: Tak Seung-Ho
Priority date: 2011-08-04
Filing date: 2012-08-03
Publication date: 2013-02-07
Also published as: WO2013019089A3

Abstract

Disclosed is a prefabricated building. The prefabricated building according to the present invention is configured such that an end of an annular steel pipe is assembled to a nut portion of a bi-directional fastening bolt/nut, a bolt portion of the bi-directional fastening bolt/nut is assembled to a nut hole of a connector, and a plurality of annular steel pipes are assembled in the above-described manner and connected with each other so as to form a basic frame of the prefabricated building. The prefabricated building comprises an annular steel pipe structure in which rings are installed along the outer peripheries of the annular steel pipes at predetermined intervals such that square elements of the plurality of annular steel pipes are additionally installed at the outer peripheries of the annular steel pipes by means of the rings. According to the present invention, the prefabricated building can be easily assembled even by a nonspecialist without the use of special tools or instruments. Further, mass pre-production of standardized modules and parts is enabled to reduce primary costs and minimize manpower needed for assembly, time needed for assembly, and other costs.

Description

Prefab buildings

The present invention relates to a prefabricated building, and more particularly, to a prefabricated building that quickly assembles a building without using special equipment or tools in a building site using mass-produced modular unit parts.

In general, to build a building, it is necessary to construct the foundation according to the design drawings, reinforcement-based cement and sand gravel, etc. It takes a long time to build a building according to the process procedure, a lot of manpower and enormous costs are invested in each process, and labor costs are particularly high among the construction costs.

In addition, according to the process procedure, the construction materials are sequentially transported to the construction site, processed at the site, and skilled workers work according to the exterior and interior processes. do.

Therefore, in order to solve this problem, the PC method for assembling the material produced in the factory in the field is applied in various ways in various construction sites, but the PC method can also be performed only by process experts. Therefore, it was practically impossible for non-experts, ie, ordinary people, to build certain buildings.

Looking at the related art in detail, Korean Laid-Open Publication No. 2012-0040457 (Inventive name: prefabricated building construction device) is a prefabricated building construction device for elevating the pre-assembled roof structure from the floor when the prefabricated building construction Is disclosed. The structure of the prefabricated building construction device including upper and lower guide members and vertical guide bar is simple, so that the assembly work can be performed quickly and easily without being restricted by the construction location and work space. In addition to securing safety due to the lifting and lowering of the structure, additional processes such as finishing the cut roof for the installation of vertical guide bars after construction are excluded, improving workability and shortening the construction period.

In addition, Korean Laid-Open Patent Publication No. 2012-0011688 (name of the invention: prefabricated building) discloses a prefabricated building using a sandwich panel improved by applying a two-stage roof. The side wall can be easily assembled between the lower rail and the upper rail by sliding type, and the pillar members standing on the four sides hold the side wall, which is excellent in durability and can be used without damage even during natural disasters such as strong wind or typhoon. .

The technical problem to be achieved by the present invention is to solve the problems of the conventional prefabricated building, to provide a prefabricated building that can be easily assembled without a special tool or extension.

In the prefabricated building according to the present invention for achieving the above technical problem, the end of the circular steel pipe is assembled to the nut portion of the bidirectional binding bolt / nut and the bolt portion of the bidirectional binding bolt / nut is assembled to the nut hole of the connector, Assembling a plurality of circular steel pipes in the same way and connected to each other to form a basic frame of the prefabricated building, by installing a ring at a predetermined interval on the outer diameter of the circular steel pipe, a plurality of circular steel pipe square portion outside the circular steel pipe through the ring It further includes a circular steel pipe structure for installation.

Prefabricated building according to the present invention for achieving the above another technical problem, a plurality of circular steel pipe is connected to form a basic frame of the prefabricated building, a plurality of half pipe (half pipe) to the end of the circular steel pipe are mutually coupled It is surrounded by a ring fixing portion for fixing the half pipe at a predetermined position outside the plurality of half pipes, and by rotating the bolts connected to the plurality of half pipes to expand the inner tube binding portion located inside the half pipe to match the inner diameter of the circular steel pipe Characterized in that to bind the circular steel pipe.

Prefabricated building according to the present invention for achieving the above another technical problem, a plurality of circular steel pipe is connected to form a basic frame of the prefabricated building, the first tube is inserted into the circular steel pipe, the first tube One end of the inner inclination is formed so that the bolt can be passed through and fixed to the protrusion of the bolt protruding out of the one end of the first tube, the nut is fixed, one end of the first pipe formed with the inner inclination is A plurality of cut parts are formed in the first pipe direction, and when the nut is rotated toward the bolt, the cut parts expand and bind with the circular steel pipe.

According to the prefabricated building according to the present invention, even non-expert general people can easily assemble the prefabricated building without special tools or extensions. In addition, by mass production of standardized modules and components in advance, it is possible to reduce the primary cost and minimize the manpower and assembly time related costs.

1 is a view showing a small diameter round steel pipe, a bidirectional binding bolt / nut and a hexahedral connector according to the present invention,

2 is a view showing a small diameter round steel pipe, a bidirectional fastening bolt / nut and a spherical connector and a six-way connector according to the present invention;

3 is a view showing a large diameter round steel pipe, a bidirectional fastening bolt / nut and a hexahedral connector according to the present invention;

Figure 4 is a view showing a state in which the height adjustment pedestal disposed below the circular steel pipe structure according to the present invention,

5 is a view showing a rectangular steel pipe structure arranged to disperse the bending strength applied to the circular steel pipe structure according to the present invention;

6 is a view showing a special bolt for coupling a large diameter circular steel pipe and a square steel pipe according to the present invention,

7 is a cross-sectional view showing a state in which the small diameter / large diameter circular steel pipe according to the present invention is combined with a circular steel pipe square portion using a ring,

8 is a view showing six cases of assembling the circular steel pipe square and the wall according to the present invention,

9 is a view showing a right angle cross fastening portion intended to reinforce the binding of the vertical and horizontal intersecting portion of the circular steel pipe rectangular portion according to the present invention,

10 is a view showing a detailed structure of the wall according to the invention,

11 is a view showing a wall corner fixing portion according to the present invention,

12 is a view showing a coupling structure of a circular steel pipe square part and a ring according to the present invention;

13 is a view showing a color identification label and number system and a manual structure of each component of the present invention;

14 is a view showing a method for packaging and identifying each component of the present invention;

15 is a view illustrating a state in which a circular steel pipe is coupled using a half pipe according to another embodiment of the present invention;

16 is a view illustrating a state in which a circular steel pipe is coupled using a bolt according to another embodiment of the present invention; and

17 is a view illustrating a state in which a plurality of circular steel pipes are orthogonally assembled through a orthogonal connection portion of a circular steel pipe according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the prefabricated building according to the present invention.

1 shows a small diameter circular steel pipe 5, a bidirectional fastening bolt / nut 7 and a hexahedral connector 3A according to the present invention, and FIG. 2 shows a small diameter circular steel pipe 5, bidirectional according to the present invention. 3 shows a binding bolt / nut 7 and a spherical connector 3B / 6-way connector 3C, and FIG. 3 shows a large diameter round steel pipe 10, a bidirectional binding bolt / nut 7 and It is a figure which shows the hexahedral connector 3A.

1 to 3, in the prefabricated building according to the present invention, both ends of the

circular steel pipes

5 and 10 are assembled to the nut portions of the bidirectional binding bolts / nuts 7, respectively, and the bidirectional binding bolts / nuts 7 ) Bolts are assembled to the nut holes 4 of the

connectors

3A and 3B. In this way, the plurality of

circular steel pipes

5 and 10 are assembled through the

connectors

3A and 3B and connected to each other to form a basic frame of the prefabricated building. That is, the

round steel pipes

5 and 10 are bidirectional fastening bolts / nuts which can be assembled by rotating the

round steel pipes

5 and 10 and the

connectors

3A and 3B in opposite directions, respectively, for fast and robust assembly without welding each other. Assemble the connector coupling bolt (1) of (7) through the steel pipe coupling nut (2) into the nut hole (4A) of the hexahedral connector (3A) or assemble into the nut hole (4B) of the spherical connector (3B). do. By repeating the process of joining the

circular steel pipes

5 and 10 to the

connectors

3A and 3B without welding each other, a circular steel pipe structure composed of the

circular steel pipes

5 and 10 is produced. In addition, the circular steel pipe (5, 10) is coupled to the six-way connector (3C) may be coupled to a plurality of circular steel pipe (5, 10) in the x-axis, y-axis and z-axis direction.

At this time, the bidirectional binding bolt / nut (7) is composed of a connector coupling bolt (1) and a steel pipe coupling nut (2), before the connector of the circular coupling (5, 10), the connector coupling bolt (1) and the steel pipe coupling nut ( 2) must be assembled in advance. Small-area single-story buildings use short diameter small diameter round steel pipes 5, and large area buildings preferably use long diameter large diameter round steel pipes 10.

The coupling structure of the circular steel pipe according to another embodiment of the present invention is shown in Figures 15 to 16. Referring to Figure 15, the basic frame of the prefabricated structure according to the present invention is the same as described above using a circular steel pipe structure. However, as shown in FIG. 15, a plurality of

half pipes

11 and 12 are coupled to both ends of the circular steel pipe 5 to surround the ends of the circular steel pipe 5, and the plurality of half pipes ( Outside the 11, 12, the ring fixing portion 20 for fixing the combined half pipe (11, 12) is located, by rotating the bolt (8) connected to the plurality of half pipe (11, 12) half pipe (11, 12) 6) to bind the circular steel pipe (5) by expanding the internal binding portion (6) located in the inner half of the tube to fit the inner diameter of the circular steel pipe (5). At this time, a circular rail groove (not shown) may be generated at a portion to which the plurality of

half tubes

11 and 12 are joined to inject an elastic body into the circular rail groove, thereby further strengthening the binding of the circular steel pipe 5 described above.

Referring to FIG. 16, the first pipe 16 is inserted into the circular steel pipe 5, and one end of the first pipe 16 has an internal inclination formed therein so that the bolt may pass through and fixed to the protrusion of the bolt. A nut is fixed to one end of the first tube 16, and one end of the first tube 16 having an internal inclination forms a plurality of cut portions cut in the tube direction of the first tube 16. Therefore, when the nut is rotated toward the bolt, the above-described cutting part expands and binds to the circular steel pipe 5. At this time, the saw blade 22 is formed on the outer surface of the cut portion so that the saw blade 22 is embedded in the inner diameter side of the circular steel pipe 5 can further strengthen the binding of the circular steel pipe (5). In addition, referring to FIG. 17, the circular steel pipe 5 may be connected to each other in the x, y, and z axis directions by orthogonally assembling the plurality of circular steel pipes 5 through an orthogonal connection part 50.

4 is a view showing a state in which the height adjustment pedestal 66 is disposed below the circular steel pipe structure according to the present invention. Referring to FIG. 4, the height adjustment pedestal 66 may adjust the height of the prefabricated building by supporting the circular steel pipe structure constituting the pillar of the prefabricated building in the bottom of the circular steel pipe structure.

Further, in order to distribute the load of the prefabricated building, the wall load is distributed to the

circular steel pipes

5 and 10, and the floor load is assembled to be distributed to the square steel pipe 13. That is, referring to Figure 5, in order to distribute the bending strength of the circular steel pipe structure, the lower sub-connector 14 is connected to the end of the circular steel pipe structure and the square steel pipe 13 is installed inside the lower sub-connector 14 Create a steel pipe structure.

The

connectors

3A and 3B consist of a hexahedral connector 3A, a spherical connector 3B, a lower sub connector 14 and a flat sub connector 17. The hexahedron connector 3A and the spherical connector 3B may have a plurality of

nut holes

4A and 4B.

The hexahedron connector 3A is mainly used when assembled with the small-diameter circular steel pipe 5, and has a weaker property than the spherical connector 3B because the pitch number to which the bidirectional binding bolt / nut 7 is assembled is small due to the hexahedron structure. The spherical connector 3B is mainly used when assembled with the large-diameter circular steel pipe 10, and has a stronger pitch than the hexahedron connector 3A because the pitch number of the bidirectional binding bolts / nuts 7 is assembled because of the spherical structure. However, due to the nature of the spherical structure to process the nut around the hole (4B) flat so that the two-way binding bolt / nut (7) can be firmly assembled.

As the lower sub-connector 14 has a long diameter of the small diameter circular steel pipe 5 as shown in FIG. 5, the above-described bending strength problem occurs, so that the end of the small diameter circular steel pipe 5 is distributed to distribute the floor load. Install in the part. Also, as shown in FIG. 6, the balanced sub connector 17 is engaged with the square steel pipe binding bolt 18 of the square steel pipe 13 to distribute the floor load of the large-diameter circular steel pipe 10 so as to share the floor load. do.

High-rise buildings with three or more floors can be constructed by distributing the load in combination with

circular steel pipes

5 and 10 using H-beams (not shown). However, when using H-beams, the use of special equipment (eg cranes) is inevitable.

Figure 7 is a cross-sectional view showing a state in which the small diameter / large diameter circular steel pipe (5, 10) in accordance with the present invention combined with the circular steel pipe square portion 25 using the ring 27. Referring to FIG. 7, a plurality of circular steel pipe squares 25 are installed outside the

circular steel pipes

5 and 10 through the ring 27 by installing the ring 27 at regular intervals on the outer diameters of the

circular steel pipes

5 and 10. You can install additional Outside the ring 27 there is a plurality of inserts such that a plurality of circular steel pipe squares 25 can be additionally inserted. In addition, a plurality of

rail grooves

29, 30, 31, 32, and 33 are formed at one side of the circular steel pipe rectangular part 25, so that the binding position of the wall can be selected. That is, as shown in FIG. 8, a plurality of

rail grooves

29, 30, 31, 32, and 33 are selected from the plurality of

rail grooves

29, 30, 31, 32, and 33. By inserting walls into the rail grooves, you can arbitrarily select and assemble thin and thick walls. In addition, in addition to the

rail grooves

29, 30, 31, 32, and 33 described above, an additional first rail groove 23 may be disposed on a surface where the circular steel pipe squares 25 meet each other, and the first rail groove may be located. Insulation material can be inserted in (23).

Referring to FIG. 8, (a) is a view showing a thin wall (100 mm) applied to a tropical region, (b) is a medium wall (110 mm), and (c) is a thick wall of one region ( 120-130 mm), (d) an extreme area double insulated wall (180-200 mm), (e) an extreme area double insulated wall, and (f) an extreme area double insulated wall, The figure which shows is shown. That is, the wall binding part 39 is bound to the arbitrary rail groove 33 of the circular steel pipe square part 25, and an indoor wall can be comprised using the hanging of the indoor wall 38. As shown in FIG. In addition, by drilling a hole in the intermediate wall (36), the iron plate (41) on the back and through the bolt to assemble the wall binding portion (39) with a nut can form a more robust wall. At this time, between the indoor wall (38), the intermediate wall (36), the outdoor wall (34) by adding a heat insulating material and a sound absorbing material using a foam glass or polyurethane, etc. can be used according to the purpose and purpose of use. In addition, the outdoor wall 34 and the intermediate wall 36 may use a wall made of magnesia as a raw material or a wall made of a similar material. In extreme areas, double insulation structures can be used to double insulation or double noise shielding.

9 is a view showing a right angle cross fixing portion 52 to strengthen the binding of the portion of the cross section of the round steel pipe square 25 according to the present invention. Insert the right angle cross fastening portion 52 into the

corner rail grooves

29, 30, 31, 32, 33 of the round steel pipe square 25, and rotate the bolt 53 of the fixing body 54 by 90 degrees. The fixed body 54 is bound inside the rail groove of the steel pipe square portion 25 so that two circular steel pipe square portions 25 crossing in the vertical and horizontal direction may be strongly bound. The use of a right angle cross straightening portion 52 on the inner diagonal between the outdoor wall 34 and the interior wall 38 may also be useful for fixing the multilayer glass or tempered glass to the round steel square 25 in addition to the purpose of reinforcing the structure. Can be.

10 is a view showing the detailed structure of the wall according to the present invention. Referring to FIG. 10, a board obtained by synthesizing magnesia (magnesium oxide) and fiber is used as the interior wall 38, the intermediate wall 36, and the outdoor wall 34. The outdoor wall 34 and the intermediate wall 36 are formed in a box shape, and the inside thereof is filled with polyurethane or foam glass to form a wall according to the purpose of use of heat insulation and sound insulation. In addition, the bolts coupled to the iron plate penetrating the inside of the intermediate wall (36) by assembling the nut of the square steel pipe (45) to push and fix the wall binding portion 39, the five rails of the circular steel pipe square (25) The wall binding portion 39 is firmly coupled by rotating the wall binding portion 39, which has been inserted into one of the

grooves

29, 30, 31, 32, and 33 in the rail groove in a fixed direction, to bring both ends of the rail groove into close contact with each other. Can be.

11 is a view showing the wall corner fixing part 56 according to the present invention. Referring to (a) to (c), the wall edge fixing part 56 is configured to strongly bond the edges of the wall while holding the circular steel pipe squares 25 perpendicular to each other at right angles. The corner fixing part 56 has a structure in which the vertical lever 59 is pushed so as not to escape from the inside of the

rail grooves

29, 30, 31, 32, and 33 of the circular steel pipe square part 25. The corner fixing part 56 may fix the bolt 42 coupled to the rear iron plate 41 through the middle wall 36 and fix it to the wall edge through the hole of the corner fixing part 56. That is, by using the vertical lever 59 and the

rail grooves

29, 30, 31, 32, and 33, the edge fixing parts 56 at the edges of the walls are connected to each other to fix the two walls. In addition, as shown in (b), when the turnbuckle 77 is rotated by using the iron plate or the wire 75 in the hole 78 of the corner fixing part 56 in a diagonal direction, the corner fixing part 56 is formed. It is pulled tightly to each other, so that the structure of the quadrilateral wall can be strongly bound.

12 is a view showing a coupling structure of the circular steel pipe square 25 and the ring 27 according to the present invention. Referring to FIG. 12, the coupling insulation 100 may be inserted into the inner rail groove 101 due to a minute tolerance between the inner rail groove 101 of the circular steel pipe square 25 and the insertion part of the ring 27. have. Insert the ring 27 into the outer diameter of the

round steel pipes

5 and 10 by using the elasticity of the O-ring 103 or the one-rounded circular pipe 106 at a predetermined position of the

round steel pipes

5 and 10. In the state in which the circular steel pipe square portion 25 is brought into close contact with the ring 27, the coupling heat insulating body 100 can be pushed into the insertion portion of the ring 27 to be assembled.

FIG. 13 is a view showing a color identification label and a number system and a manual structure of each component of the present invention. Circular steel pipe (5, 10), square steel pipe (13), connector (3A, 3B), ring 27, circular steel pipe square portion 25, etc. according to the present invention is manufactured to a predetermined weight and size . That is, it is standardized in weight and size that two adult men can carry, and each part is labeled by color so that it can be assembled in order by manual. For example, the label of the height adjustment pedestal 66 may be designated as brown, and the label color of all parts related to the bottom may be designated as brown. In addition, each label is numbered so that they can be assembled in numerical order (see FIG. 14).

At this time, temporary work stairs can be created by using the last part used to facilitate the assembly work, which is to disassemble the scaffolding after the column and roof work is completed, and the quadrilateral for distributing the floor load, specifically the floor load. Can be used as a steel pipe.

In addition, to check the level of the building to assemble the circular steel pipe (5, 10), the circular steel pipe square portion 25 and the ring 27 on the two height adjustment pedestal 66 to stop the liquid mixed with ink in water You can check the degree of inclination by pouring the ink into the grooves to check the ink color density. At this time, if the level is not correct, the height of the height adjustment pedestal 66 can be adjusted to level the building. If the horizontal portion of the circular steel pipe structure constituting the basic frame of the prefabricated building is not horizontal, the vertical direction of the vertical portion of the circular steel pipe structure is also not correct, and assembly itself is impossible. Therefore, if the horizontal portion of the circular steel pipe structure does not match, it can be leveled according to the flatness and strength of the ground using a turnbuckle or the like.

Roofs in snowy areas can be constructed in such a way that the angle of inclination sharply distributes snow loads. The roof used in the prefabricated house according to the present invention may separately install snow detection sensors to distribute snow loads by flowing an electric current through a heating wire disposed under the roof to melt snow. Safety measures may be added to prevent overheating of the heating wire. Instead of a heating device, you can install a metal plate with good thermal conductivity and heat the heating device under the roof through a heat pipe to melt the snow. In addition, when constructing walls, pipes and wires for electrical wiring are provided inside the walls and special connectors are provided at the ends of the wires. Make it easy for anyone to assemble.

In the above description, terms such as 'first' and 'second' are used to describe various components, but each component should not be limited by these terms. That is, terms such as 'first' and 'second' are used for the purpose of distinguishing one component from another component. For example, a 'first component' may be referred to as a 'second component' without departing from the scope of the present invention, and similarly, a 'second component' may also be referred to as a 'first component'. Can be. In addition, the term 'and / or' is used to mean a combination of a plurality of related items or any item of a plurality of related items.

The invention can also be embodied as computer readable code on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and may also be implemented in the form of a carrier wave (transmission through the Internet). The computer-readable recording medium may also be distributed over computer systems connected through wired and wireless communication networks so that the computer-readable code may be stored and executed in a distributed manner.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific preferred embodiments described above, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and such changes are within the scope of the claims.

Claims

Assemble the end of the round steel pipe to the nut part of the bidirectional fastening bolt / nut, and the bolt part of the bidirectional fastening bolt / nut to the nut hole of the connector. A prefabricated building comprising a circular steel pipe structure constituting a basic frame of the circular steel pipe and installing a plurality of circular steel pipe squares outside the circular steel pipe through the ring by installing rings at regular intervals on the outer diameter of the circular steel pipe. .
The method of claim 1,

Prefabricated building further comprising a height adjustment pedestal to adjust the height of the prefabricated building by supporting the circular steel pipe structure constituting the pillar of the prefabricated building in the circular steel pipe structure.
The method of claim 2,

Prefabricated building further comprising a rectangular steel pipe structure for connecting the sub-connector to the end of the circular steel pipe structure and install the rectangular steel pipe inside the sub connector to distribute the bending strength of the circular steel pipe structure.
The method of claim 1,

And the bidirectional binding bolt / nut is assembled with the bolt part through the nut part before being assembled with the circular steel pipe.
The method of claim 1,

Prefabricated building, characterized in that the outside of the ring has a plurality of inserts to be inserted into the rectangular square of the steel pipe.
The method of claim 1,

Prefabricated building characterized in that the thickness of the wall can be selected by combining one or more insulating walls by selecting the binding position of the wall of the plurality of rail grooves formed on one side of the circular steel pipe square.
The method of claim 1,

The plurality of circular steel pipe is a prefabricated building, characterized in that connected in the x-axis, y-axis and z-axis direction using a six-way connector.
The method of claim 6,

Prefabricated building further comprising a wall binding portion provided with an iron plate inside the wall and penetrates the bolt through the iron plate to bind with a nut.
The method of claim 1,

Prefabricated building further comprises a right-angled cross-fixing part inserted into the rail groove of the circular steel pipe square portion to strengthen the binding of the portion where the two circular steel pipe square portions intersect.
The method of claim 6,

Located at four corners of the wall, prefabricated building characterized in that it further comprises a corner fixing portion for fixing the walls to each other by connecting a vertical lever into the rail groove of the circular steel pipe square.
The method of claim 1,

Located on the circular steel pipe structure, prefabricated building characterized in that it further comprises a roof configured to transfer heat through a predetermined heat source composed of a thin thermally conductive film.
The method of claim 1,

When the horizontal portion of the circular steel pipe structure constituting the basic frame of the prefabricated building is horizontal, the vertical direction of the vertical portion of the circular steel pipe structure is assembled, it is possible to assemble the building.
The method of claim 12,

When the horizontal portion of the circular steel pipe structure does not match the horizontal building, characterized in that the leveling according to the flatness and strength of the ground using a turnbuckle.
The method of claim 1,

The connector is any one of a cube, a cuboid or a spherical shape, and the connector includes a plurality of nut holes.
The method of claim 3,

Prefabricated building, characterized in that the circular steel pipe, square steel pipe, bidirectional binding bolt / nut, connector, ring, steel pipe square part is made in a predetermined weight and size.
The method of claim 3,

Prefabricated building, characterized in that the circular steel pipe, square steel pipe, bidirectional binding bolt / nut, connector, ring, steel pipe square parts are attached to the color-specific labels in order by manual.
A plurality of circular steel pipes are connected to form the basic frame of the prefabricated building,

A plurality of half pipes are joined to surround the ends of the circular steel pipes, and a ring fixing part is disposed to fix the half pipes to a predetermined position outside the plurality of half pipes, and the bolts connected to the plurality of half pipes are rotated. Prefabricated building characterized in that to bind the circular steel pipe by expanding the internal binding portion of the half pipe located inside the half pipe to match the inner diameter of the circular steel pipe.
The method of claim 17,

Prefabricated building, characterized in that the elastic rail is injected into the circular rail groove by creating a circular rail groove in the portion where the plurality of half pipes are joined.
A plurality of circular steel pipes are connected to form the basic frame of the prefabricated building,

The first pipe is inserted into the circular steel pipe, one end of the first pipe is formed with an internal inclination so that the bolt can be passed through and fixed, the protrusion of the bolt protruding out of the one end of the first pipe nut One end of the first pipe having the internal inclination formed therein is fixed, and a plurality of cutting parts are formed in the direction of the first pipe, and when the nut is rotated toward the bolt, the cutting parts expand and bind with the circular steel pipe. Prefabricated building characterized in that.
The method of claim 19,

Saw blades are formed on the outer surface of the cut portion, the saw blade is embedded in the inner diameter of the circular steel pipe.
The method of claim 19,

The circular steel pipe is a prefabricated building, characterized in that orthogonal assembly of a plurality of circular steel pipe through an orthogonal connection.