JPS58189443A - Assembling of reinforcing steel wire - 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 The present invention relates to a method for assembling reinforcing bars in construction or civil engineering reinforcing work.

Reinforcing bars are the backbone of a reinforced concrete structure, and are required to be appropriately placed at predetermined locations.

The work of arranging and assembling such reinforcing bars was a tedious task of fixing individual reinforcing bars one by one with binding wires, which was extremely time-consuming and labor-intensive1. Gas pressure welding is usually used for this, but this requires the advanced skills of qualified personnel who have passed a skill test.

Furthermore, these assembling and press-welding operations often involve work at heights, and are extremely dangerous operations that are prone to falling accidents.

The purpose of the present invention is to fully consider the special circumstances of reinforcing steel assembly in construction work, and to firstly improve work safety;
The second objective is to provide a reinforcing bar assembly method that can significantly reduce costs, and third, is sufficiently reliable in terms of strength.

However, according to the present invention, the purpose of the lever is to assemble required parts of columns, beams, walls, and slabs in construction or civil engineering work on the ground by electric welding, and to lift each assembled member using clay. The mutual joining of each member is achieved by electrically welding the large diameter portions formed at the ends of the reinforcing bars.

Embodiments of the present invention will be described in detail below with reference to the drawings.

First, regarding the reinforcing bars used in the present invention, the diameter is 5.
For comparatively small-diameter reinforcing bars such as D10, 5D13, 5DI6, etc., a reinforcing bar 1 with large diameter portions 2 formed at appropriate locations is used as shown in FIG. This large diameter portion 2 preferably has a rectangular cross section.

The reinforcing bar 1 is manufactured by first extruding a square material with a rectangular cross section by passing it between fixed rotating rolls of a strip mill, and then extruding the square material by passing it between fixed rotating rolls of a strip mill. The material may be passed between two rotating rolls made of fixed rolls, and the portion that will become the large diameter portion 2 may be left and the remaining portions may be drawn to form a circular cross section. Note that the pitch of the large diameter portion 2 is preferably about 15001111.

Such small-diameter reinforcing bars 1 such as SDl 0 , SDl 3 , and SDl 6 are usually used as reinforcement for walls and slabs.

Fig. 2 is a perspective view showing the case where slab reinforcement is assembled into the ground using the above-mentioned reinforcing bars 1, and the reinforcing bars 1 assembled in a lattice shape have their intersections in contact with the large diameter portion 2 as shown in Fig. 6. This will often happen, so spot weld this part to fix it. FIG. 6 (α) shows that when the large diameter portions 2 are located at the intersection, (
b) is a case where the large diameter part 2 is on one side and the normal side of the reinforcing bar 1 is on the other, but in either case, the plane of the large diameter part 2 can sufficiently secure the spot welding part. .

Incidentally, there may be an intersection portion where there is no thick diameter 2 at all, but this portion may be fixed with a thick binding wire for civil engineering.

FIG. 4 is a perspective view of a wall reinforced metal framework. When a plurality of lattice bodies 3 each having reinforcing bars 1 are arranged in parallel in this way, each lattice body 3 is connected to an R-shaped connecting reinforcing bar 4. Link.

FIG. 5 is an enlarged view showing the details of the connecting part, and the end of the connecting reinforcing bar 4 is fixed to the side surface of the reinforcing bar 1 by electric welding.

In addition, when assembling a wall with metal frame in this way, it is sufficient to assemble the lattice body 3 horizontally and then vertically when lifting it, and high scaffolding is not required at all during the assembly work. In the reinforcement arrangement of a slab, when a plurality of lattice bodies 3 are lined up, they are similarly connected by reinforcing bars 4.

The slab reinforcements and wall reinforcements assembled in the above manner are welded at appropriate locations through the large diameter portions 2, and the lattice bodies 3 are welded and connected to each other by reinforcing bars 4, which serve as reinforcements, making them sturdy. Even if all other parts are fixed with binding wire or wire, it will be able to withstand the lifting load of a crane, etc.

Next, using the present invention, 5D25, Sn2[],
'SD, describes large diameter reinforcing bars of 55 or more.

As shown in FIG. 5, such large-diameter reinforcing bars 5 are formed with large-diameter portions 6 having tapered end surfaces 6α at their ends. This tapered end surface 6α is a large diameter portion 6 of the reinforcing bar 5.
The area north of 25 times the vertical cross-sectional area of other places rich JI
Formed to have strength that meets S standards. As for the manufacturing method of the reinforcing bar 5, same as the above-mentioned reinforcing bar 1,
First, a square material with a rectangular or semicircular cross section is manufactured by passing it between fixed rotating rolls of a lug mill, and then passing it between a vertically movable roll and a fixed roll, leaving a part that will become the large diameter part 6. Draw the rest to make a circular cross section.

Two reinforcing bars 5 can be obtained by cutting the large diameter portion 6 of the material thus obtained at an angle of about 45° or less using a cutting machine such as a shearer, as shown in FIG.

Note that if a V-cut groove 7 is provided along the cutting line when cutting, a cut portion 8 for welding can be simultaneously formed on the periphery of the tapered end surface 6α.

This large-diameter reinforcing bar 5 is used as the main bar for columns and beams.

To explain the case of assembling columns or beams using reinforcing bars 5, as shown in FIG. Further, as shown in FIG. 9, the four sides of the reinforcing bars 5 disposed at the four corners of the hoop reinforcing bars 10 are connected by F-shaped coupling reinforcing bars 11.

The reinforcing bars 11 are made to intersect at the center, and the ends α, l and the intersection are fixed by electric welding (spot welding). Further, the hoop reinforcement IO and the reinforcing bar 5 serving as the main reinforcement may be fixed with thick binding wire for civil engineering.

All pillars and beams are assembled using the method described above, especially in the case of pillars, which can be assembled horizontally on the ground and then turned vertically when hoisting them up, so there is no need for high scaffolding during assembly.

The reinforcing bars for walls, slabs, beams, etc. that have been assembled on the ground in this way are hoisted up by a crane and erected at a predetermined position at a high place, as shown in FIG. In Figure 10, (α) shows the state in which slab reinforcements and wall reinforcements are being lifted, and (b) shows the state in which column reinforcements and wall reinforcements are being lifted. Construction can be streamlined by building columns and beam reinforcements in a symmetrical manner.

When it is necessary to join constructed members such as columns and beams to each other, as shown in FIG.
It is sufficient to abut the end surfaces 6α of the teeth formed in the above and perform electric bath welding using the cut portion 8. This end face 6 (Z
Since the area is more than 2.5 times that of a normal cross section, a sufficiently strong joint can be obtained even if all the troublesome work such as pressure welding is performed.

As described above, the reinforcing bar assembly method of the present invention is applicable to columns.

Reinforcing steel members for beams, walls, and slabs are assembled on the ground by electrical welding at the required points, and each assembled member is lifted by a crane. Each member is joined to each other by connecting the large-diameter parts formed at the ends of the reinforcing bars. Since we decided to use electric welding, all of the parts could be assembled on the ground and made into grenops, then lifted up by a crane and erected, which would reduce the amount of work required at heights, making it easier to assemble reinforcing bars. This eliminates the need for expensive scaffolding, reduces manpower and work time, and significantly reduces costs.

In addition, the reduction in the amount of work required at heights in particular prevents accidents such as falls, thereby significantly increasing safety.

Furthermore, each of the assembled glenob members is solid and fixed by welding at all required locations, making it able to withstand shocks when lifted by a crane. .

Electric welding can also be used to join parts together at high places, and by performing all electric welding, it is possible to streamline construction by omitting all the pressure welding work that requires the advanced skills of qualified personnel. It is.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a small-diameter reinforcing bar used in the present invention, Fig. 2 is a perspective view of a slab bar, and Fig. 3 is a sectional view showing the same joint.
Fig. 4 is a perspective view of the wall reinforcement, Fig. 5 is a side view of the main part of Fig. 4, Fig. 6 is a partial perspective view of the large diameter reinforcing bar used in the present invention, and Fig. 7 is the reinforcing bar of Fig. 6. Fig. 8 is a perspective view showing the complete assembly of columns and beams in an embodiment of the present invention, Fig. 9 is a perspective view of assembled columns and beam reinforcements, and Fig. 10 is a perspective view of the assembled columns and beams. A perspective view showing the process, and FIG. 11 is a side view showing the next process. 1... Reinforcing bar 2... Large diameter part 3...
... Lattice body 4 ... Connecting reinforcing bars 5 ...
...Thick diameter reinforcing bar 6...Thick diameter reinforcing bar part 6α
...Tapered end surface 7 ... V-cut groove 8 ・, -cant part 9 ... Jig 1
1...Reinforcement bar for connection Applicant: Teru Kominato
Male figure 4 rod 50・1 figure 9

Claims (1)

[Claims] In construction or civil engineering work, all required parts of the reinforcing bars for columns, beams, walls, and slags are electrically welded and assembled on the ground, each assembled member is lifted by a crane, and each member is joined to each other at the ends of the reinforcing bars. A reinforcing bar assembly method characterized by fully electrically welding the formed large diameter parts to each other 1.