JPH01146033A - Method of joining construction member as closed type section - Google Patents

Abstract

PURPOSE: To device easy joining work by mounting a backing metal for welding work to be used in the abutment of the joint ends of both construction members, on one of joint end of the construction member in such manner that it can be come in and out from one of joint ends by the operation from the outside of the closed section. CONSTITUTION: First of all, one of construction members 1 is built in the other construction member 1 mounted on a pole 7 from the laterial direction in a state that a backing metal 2 is buried from a joint end. Then the premounted joint pieces 5, 6 for building-in and the connection plates 8, 8 are fastened by bolts, simultaneously the upper surfaces 1a, 1a of both the construction members 1, 1 and both connection plates 8, 8 are fastened by bolts. Then the backing metal 2 is moved by the operation of a nut 4 to be projected from the joint end, whereby the joint ends of the side surfaces 1c, 1d of both the construction members 1, 1 are closed, and 1c and 1d are welded to one another. Thus the construction members can be easily and surely joined by the field work.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for joining construction members in which two construction members formed in a closed cross section to be connected are joined on-site.

[Prior art and problems to be solved by the present invention] Conventionally, when a construction member such as a beam has a closed cross section, the entire cross section of the member can be used against compression, and it is also advantageous against lateral buckling and torsion. It is known to be effective.

If an attempt is made to join the closed cross-section and the L7 construction members, conventional joining work would be difficult on-site.

That is, when joining by welding, a backing metal for welding cannot be attached to the joining end in advance because the closed cross section will get in the way when the joining ends of both construction members are brought into contact.

Therefore, it is necessary to enter the closed-section construction member and attach the metal with the backing, and a working hole is required for a worker to enter inside the construction member.

As described above, in the past, there has been no established method for easily and reliably joining construction members with closed cross sections on-site because welding work is difficult.

For this reason, in the past, construction members such as beams with closed cross sections have not been used very often because they cannot be joined on-site and are expensive, despite having the above-mentioned effective effects.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to provide a method for joining construction members that can easily and reliably join construction members having closed cross sections.

[Means for solving problems]

According to the present invention, a backing for welding work between the constituent surfaces of the two construction members, which is used when the joint ends of the two construction members are brought into contact, is provided on the two construction members to be joined, each having a closed cross section, at the joint end of the construction member surfaces. A deposit is set.

Then, the backing metal is provided so that it can be freely retracted from one joint end of the construction member by operating from outside the closed cross section, and after the joint ends of both construction members are brought into contact with the backing metal recessed, it is closed. The two construction members are joined by protruding a backing metal from outside the cross section, closing the joint ends of each constituent surface, and welding.

〔Example〕

The construction member 1 used in performing the joining method of the present invention has upper and lower surfaces 1a as shown in FIG.

1b and both side surfaces 1c and ld are formed into a rectangular closed cross section, and at one joint end of the constructional surfaces, there is a backing for welding the constructional surfaces together, which is used when the joining ends of both construction members are brought into contact. A bet 2 is provided.

The backing metal 2 is provided so that it can be freely moved in and out of the joint end by operating from outside the closed section.

In this embodiment, backing metals 2 are provided on both side surfaces 1c and ld constituting the construction member 1, and both construction members 1.
By welding both sides 1c and ld of 1, the upper and lower surfaces 1a and l
b are connected to each other by bolt connection.

Further, the backing metal 2 in this embodiment is provided in a closed cross section, and bolts 3 are provided at the upper and lower portions of both side surfaces 1c and ld to pass through elongated holes 1e extending in the elongated direction. , is fixed to both side surfaces 1c and ld by tightening this bolt 3 with a nut 4 from outside the closed section.

By loosening the nut 4, the bolt 3 can be moved along the elongated hole 1e, that is, the backing metal 2 can be moved.

Furthermore, the construction member l in this embodiment has upper and lower surfaces la and lb.
protrude outside the closed cross section from both side surfaces 1c, ld, the upper and lower surfaces 1a, lb are formed like flanges, and the both side surfaces 1c, ld are formed like webs.

Next, to explain the joining method of the present invention using this construction member 1, first, a joint piece 5 for erection is provided in advance at the joining end of the upper surface 1a of one construction member 1, and the other construction member 1 is A joint piece 6 is provided at the joint end of the upper surface 1a. (See FIG. 2) Here, the structure member 1 is used as the beam A, and the connection of this beam A will be described.

Next, one construction member 1 is laterally erected onto the other construction member 1 attached to the pillar 7.

At this time, the backing metal 2 is in a recessed state from the joint end, and the erection work of the construction member 1 can be easily performed.

Then, the joint pieces 5 and 6 are held between the connecting plates 8 and 8, and the joint pieces 5 and 6 and the connecting plates 8 and 8 are tightened with bolts (not shown). (See FIG. 3) At this time, the upper surfaces 1a of both construction members 1.1 are outside the closed section by the reconnection plate 8.8.

1a are held between each other, and the rain upper surface 1a, la and the reconnection plate 8,
8 and tighten the bolts.

In addition, the lower surfaces 1b, 1b of both construction members 1, 1, which are outside the closed cross section, are sandwiched between the reconnection plates 8, 8, and the rain lower surface 1b is
, lb and the reconnection plate 8.8.

Next, by operating the nut 4, the backing metal 2 is moved to protrude from the joint end, and this backing metal 2 is used to tighten both construction members 1.
．． The joint ends of the sides 1c and ld of 1 are closed. (See FIGS. 1 and 4 to 7) Then, the sides 1c and 1a of both construction members 1.1, which are closed by the backing metal 2, are welded.

This completes the joining operation of the two construction parts 1.1 to be connected. (See FIG. 1) As described above, according to the method of the present invention, even if construction members such as beams and places have closed cross sections, they can be easily and reliably joined and connected on site.

In the above-mentioned embodiment, the connection of the beam A was described, but the method of the present invention can also be used for the connection of the place 9 and the column 7 as shown in FIG.

Furthermore, the joint piece 5.6 shown in this embodiment can be used as a shear connector for a concrete floor 10 as shown in FIGS. 8 and 9.

〔Effect of the invention〕

A backing metal for welding the component surfaces, which is used when the joint ends of both construction members are brought into contact, is attached to one joint end of the construction member component surface, which is a closed cross section, and is attached to one joint end by operating from outside the closed cross section. Since it is provided so that it can freely protrude and retract from the joint end, it is possible to easily perform the work of joining the construction members together.

That is, when the constituent surfaces of both construction members are brought into contact with each other, this can be done with the backing metal recessed from the joining end. Therefore, the work of abutting the constituent surfaces of both construction members to be connected can be easily carried out without being interfered with by the backing metal even if the cross sections are closed.

In addition, a backing metal can be set between the constituent surfaces of both construction members by causing it to protrude from the joint end of the constituent surfaces by operating from outside the closed cross section. Therefore, there is no need to set the backing metal from inside the closed cross section when welding the constituent surfaces.

This eliminates the need for a worker to work from within the closed section, and also eliminates the need for a working hole for the worker to enter the closed section.

As described above, according to the method of the present invention, closed cross sections that are advantageous against compression, buckling, lateral buckling, and torsion can be easily joined on-site. Therefore, this closed cross section can be used not only for columns but also for construction members such as beams and places, and strong buildings can be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 is an enlarged perspective view of section B in FIG. 10, and FIG. FIG. 3 is a joining process diagram of the method of this invention, and FIG. 4 is a diagram. Fig. 5 is an enlarged view of section C in Fig. 1 showing the moving state of the backing metal, Figs. 6 and 7 are sectional views taken along line D in Fig. 4 and E-E in Fig. Figure 8 is an enlarged view of section F in Figure 1 showing the concrete floor installed, and Figure 9 is the section G-G in Figure 8.
The line sectional view and FIG. 10 are front views showing each construction member assembled by the method of this invention. A...Beam, 1...Construction member, la...Top surface, lb
...bottom surface, lc, ld...side surface, 1e...long hole,
2...Backing money, 3...Bolt, 4...Natsu,
5.6...Joint piece, 7...Column, 8...
- Connecting plate, 9... Place, 10... Concrete floor. Figure 1 Figure 2 - Figure 3 Figure 4 Figure 5

Claims (1)

[Scope of Claims] A method for joining two construction members formed in a closed cross section to be connected, wherein the construction members have one joining end of their constituent surfaces when the joining ends of the construction members are in contact with each other. A backing metal used for welding the constituent surfaces together is provided so that it can be freely extended and retracted from the one joint end by operating from outside the closed cross section, and when the backing metal is recessed, both A structure having a closed cross section characterized in that after the joint ends of the construction members are brought into contact, the backing metal is protruded to close the joint ends of both component surfaces, and then the joint ends are welded. How to join parts.