JPH0510108Y2 - - Google Patents

Description

[Detailed explanation of the invention] Industrial application field This invention, for example, has a roof surface of a building that has a special curved shape, and the tip of the eaves (the tip of the nose bridge) also has a three-dimensional curve. Related to a jig for adjusting the position of the tip of a beam in steel beams used for positioning and adjusting the tip of the tip of a beam in steel beam beam erection work where the positioning of the tip of the beam is an important design point. It is something.

BACKGROUND TECHNOLOGY Conventionally, the above-mentioned positioning adjustment of the tip of a steel jump beam has been carried out by accurately machining bolt holes in the joint so that the positioning of the tip of the jump beam can be adjusted accurately as the bolts are tightened. is being carried out.

Alternatively, the positioning of the tip of the jump beam can be adjusted by assembling a work scaffold and carrying out a survey while lifting it with a jack installed on the work scaffold.

Problems to be solved by the present invention The method of accurately machining bolt holes described above has a limit in improving the accuracy of bolt hole machining, and although machining takes a lot of effort, it is difficult to position the tip of the jump beam. There was a problem in that it was difficult to ensure accurate adjustment.

Furthermore, the method of assembling the work scaffold described above has the problem of being uneconomical as it requires much time and effort to assemble the scaffold.

Means for Solving the Problems As a means for solving the problems of the above-mentioned prior art, the jig for adjusting steel jump beams according to this invention is implemented as shown in FIGS. 1 and 2 of the drawings. As shown in the example, the steel frame 1 having a predetermined height is the main body, and the self-supporting fixing part 2 that holds the flange part 5a of the girder 5 in its mouth is provided at the lower end of the steel frame 1, and the upper end A strip 3b such as a chain is attached to the tension adjuster 3, and a supporting portion 3c of a steel beam 6 is provided at the tip of the strip 3b.

Operation When the free-standing fixture 2 grips the flange portion 5a of the girder 5, this adjustment jig will fix the girder 5.
It can be made to stand on its own on top of the jumper beam, and a reaction force sufficient to withstand the load required for adjusting the position of the tip of the jumper beam is ensured. The projecting beam 6 to be adjusted is initially installed so that the bolt 8 of the joint 7 is slightly loose, and a strip (chain 3) operated by the tension adjuster 3 is placed as close to the tip of the beam 6 as possible.
b) Attach the support part 3c provided at the tip of the jump beam 6, and adjust the positioning of the tip of the jump beam 6 by operating the tension adjuster 3 based on the measured value obtained by collimating the survey point 9 of the jump beam 6. can be done.

After completing the adjustment, attach the self-supporting fixing part 2 to the flange part 5.
It can be easily removed by removing it from a, and can be used for adjusting the position of the next jump beam.

Embodiment Next, the embodiment shown in FIGS. 1 and 2 will be described.

This adjustment jig is mainly composed of an H-shaped steel 1 of approximately 100 x 100 x 800 mm, and the lower end of the H-beam 1 has a self-supporting fixing part made of a steel plate processed into a substantially horseshoe shape so as to hold the flange 5a of the girder 5 in its mouth. 2 is set. In particular, this self-supporting fixing part 2 is designed so that the H-shaped steel 1 can be made to stand on its own by simply holding the flange part 5a in its grip as shown in FIG. The width of the groove 2a is approximately the same as the thickness of the flange portion 5a. Moreover, the lower part 2b of the horseshoe shape is formed a little shorter, so that the H-shaped steel 1 can be made by placing the self-supporting fixing part 2 on the flange part 5a and sliding it so that the free-standing fixing part 2 grips the flange part 5a. It is structured so that it can be used. The lower part 2b of the horseshoe-shaped self-supporting fixing part 2 is wrapped with gummed tape 10 to prevent it from slipping. In addition, a piece of cloth is placed over the flange portion 5b of the girder 5 at the position where the self-supporting fixing portion 2 is held for damage prevention purposes.

Attachment hole 4 of approximately φ40 in the upper end web part of H-beam 1
A mounting ring 3a of a tension adjuster 3, which is commonly referred to as a hitpara, is connected thereto. An annular cloth band 3c is attached to the tip of the hoisting chain 3b on the output side of the tension adjuster 3 as a support for the steel projecting beam, and the band 3c is hooked to the tip of the projecting beam 6 as far as possible. It is designed to support the

The example shown is a steel beam (nose bridge) 6
This shows the steel frame construction work for constructing the roof eaves. Initially, the bolts 8 at the joint 7 between the small nose beam 6 and the main beam 5 were tightened slightly, and the bolt holes were adjusted using the clearance of the bolt holes. It will be made possible to pay for it. Then, use a surveying instrument to sight the survey point 9 at the tip of the beam, perform a three-dimensional survey (X, Y, Z coordinates), and operate the tension adjuster 3 based on the survey results.
Adjust the position of the beam tip according to the design using methods such as leveling. After that, the bolt 8 is fully tightened to determine the adjusted position.

When the positioning adjustment is completed, it can be easily removed by removing the band 3c from the nose bridge 6 and detaching the self-supporting fixing part 2 from the flange part 5a, and then moving it to the next adjustment position. It can be used as such.

Effects of the present invention As described above in detail in conjunction with the embodiments, the steel jump beam adjustment jig according to this invention has its self-supporting fixing portion 2 connected to the flange portion 5a of the girder 5.
It can be used easily by simply attaching and detaching it, and the workability is very good.

Furthermore, since the projecting beam 6 is directly supported and its positioning adjustment is performed, the adjustment accuracy can be extremely high.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the main parts of the steel jump beam adjustment jig according to this invention, and FIG. 2 is an elevational view showing the adjustment jig in use.

Claims (1)

[Scope of utility model registration request] The main body is a steel frame 1 having a predetermined height, and a self-supporting fixing part 2 is provided at the lower end of the steel frame 1 to hold the flange 5a of the girder 5 in its mouth, and a tension adjuster is installed at the upper end. A strip such as a chain is attached thereto, and a supporting portion for a steel beam can be provided at the tip of the strip.
Jig for adjusting steel beams.