JPH01244072A - Form timber mounting method in double-u beam - Google Patents

Abstract

PURPOSE:To save time and to improve working efficiency by loading a U hanging metal fittings on a double-U beam, inserting and holding longer bolts into bolt holes on projections of both ends thereof by first nuts, inserting the longer bolts into plates of one end of form timbers and clamping them. CONSTITUTION:A hanging metal fittings 4 longer than the top width of a beam 1 and having several pairs of bolt holes 3 close to the ends thereof is loaded on the upper flange 2 of the double-U beam 1, and longer bolts 6 are inserted into belt holes 3 of the hanging metal fittings 4 vertically from the top. Vinyl hoses 7 and inverted U washer 8 are inserted into the longer bolts 6 from the lower ends, and the washers 8 are fastened to the lower surface of the upper flange 2 with first nuts 9a. The longer bolts 6 are inserted into bolt hoes of plates or one end of form timbers 10 provided to both sides of the double-U beam 1 from the lower ends, and are fastened to the lower surface of the washers 8 with second nuts 9b. According to the constitution, a time to weld the hanging metal fittings 4 with the beam 1 is saved, and the security in a time of working can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to a method for attaching formwork supports to H-beams.

Conventional technology Conventionally, when constructing a concrete slab on the top surface of an H-shaped beam, U-shaped metal fittings were welded protrudingly on both sides of the top surface of the H-shaped beam, or hanging bolts were welded to the U-shaped metal fittings. Insert the bolt hole of the end plate of the formwork support material into the hanging bolt that is fixed to the suspension bolt or welded suspension bolt, and while securing it with a nut, place a gap of about 1, 2 to 3 meters between the opposing H-shaped beams. In this method, formwork supporting materials are erected, concrete panels are placed on top of each of the formwork supporting materials, and concrete is poured.

Problems to be Solved by the Invention Therefore, it is necessary to weld a large number of U-shaped metal fittings for attaching the formwork support to the top surface of the H-shaped beam, which requires a lot of time and effort, and it is difficult to use a welding machine in high-rise buildings. When the cord was extended, it interfered with the work and was dangerous.

In order to solve these problems, the present invention provides a U-shaped tapping tool that is longer than the upper surface of the H-shaped beam and is mounted on the H-shaped beam.
The upper flange of the H-shaped beam is clamped with a washer and a nut to the hanging bolt inserted into the bolt holes of the protruding parts at both ends of the molding metal fitting, and the U-shaped metal fitting is secured. This is a formwork support installation method in which the formwork support is suspended from bolts, which saves the effort of welding U-shaped fittings to H-shaped beams and improves safety during work. It is characterized by this.

Means to solve problems Hereinafter, the configuration of the present invention will be explained with reference to the drawings.

Attach the upper flange 2 to the upper 7 flange 2 of the assembled H-shaped beam 1.
The upper flange 20 is fitted with a U-shaped hanging fixture 4 which is longer than the width of the flange and has several sets of bolt holes 3 drilled near both ends.
Cap nuts 5 are screwed onto the upper ends of both outer sides, and long bolts 6 are inserted into the bolt holes 3 from above, and a vinyl hose 7 of the same length as the wall thickness of the upper flange 2 is attached to the long bolts 6 on both sides.
6 from the lower end, and insert the inverted U-shaped washer 8.
The washer 8 joined to the bottom surface of the upper part 7 flange 2 is connected to the long bolt 6
The U-shaped extraction fitting 4 is secured to the upper surface of the H-shaped beam 1 by tightening with the first nut 9a screwed to the plate at one end of the formwork support 10 that is connected to both sides of the H-shaped beam 1. After the bolt hole 11 is fitted into the lower end of the long bolt 6, the second nut 9b is screwed onto the long bolt 6 to connect the form support 10 to the H-shaped beam. Note that 12 in the figure indicates a concrete panel.

Effects In the formwork support installation method of the present invention, the U-shaped projecting fitting 4 is attached to the upper part 7 flange 2 of the H-shaped beam 1 with the long bolt 6 and the inverted U
Since the first nut 9a is tightened and locked through the washer 8 of the mold, there is no need to weld the U-shaped metal extraction tool 4, which saves time and effort. Then, move the U-shaped metal extraction tool 4 to the front and back by 1.2 mm.
The plate 11 at one end of the formwork support 10 is passed through the long bolt 6 and tightened with the second nut 9b after being attached to the upper surface of the upper part 7 flange 2 at an interval of about 3 m to 3 m. After the formwork supporting material 10 is supported by the long bolts 6 of the U-shaped metal fittings 4 of the opposing H-shaped beams 1, a concrete panel 12 is placed on the upper surface, and concrete is poured.

After the concrete has solidified, loosen the second bolt 9b of the long bolt 6, remove the formwork support lO downward, and remove the concrete panel 12, second bolt 9b, and inverted U-shaped washer 8. Since the cap nut 5 is attached to the upper end of the long bolt 6, it can be removed if necessary by rotating in the opposite direction.

As described above, the present invention is designed to attach the long bolt 6, the inverted U-shaped washer 8, and the first nut without welding the U-shaped fitting 4 for attaching the formwork support 10 to the upper flange 2 of the H-shaped beam 1. )9a
These are combined to lock in a pinched manner to improve workability, and provide the remarkable effects described above.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment in which an H-shaped beam and formwork support are installed in series using the method of the present invention, Fig. 2 is a plan view thereof, and Fig. 3 is a U-shaped beam.
The front view of the molding tool, Figure 4 is its top view, and Figure 5 is the 4th figure.
Figure 6 is a front view of the inverted U-shaped washer, Figure 7 is a sectional view taken along the line A-A.
The figure is a plan view, Figure 8 is a sectional view taken along the line B-B in Figure 7, and Figure 9
The figure is an exploded front view of the cap nut, long bolt, and nut.

Claims (1)

[Claims] 1 Mount a hanging fixture on the upper flange of the H-shaped beam that is longer than the width of the upper flange and has several sets of bolt holes drilled near both ends, and insert long bolt holes into the bolt holes of the hanging fixture on both outsides of the upper flange. Insert a bolt from above and let it hang down, insert a vinyl hose and an inverted U-shaped washer into the long bolt from the lower end, tighten the washer to the bottom of the upper flange with the first nut, and connect it to both sides of the H-shaped beam. A method for attaching a formwork support to an H-shaped beam, the method comprising inserting a long bolt into the bolt hole of a plate at one end of the formwork support from the lower end and tightening it to the lower surface of the washer with a second nut.