JPS6338218Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the disclosure of an extremely novel and effective clamp used for horizontally lifting steel beams in construction.

One of the main purposes of the present invention is to provide stability in the horizontal position when lifting steel beams, and to effectively avoid the danger of the insertion wire coming off. It was written.

Next, one of the other main purposes of the present invention is to simplify the clamp structure for lifting such heavy objects as much as possible, thereby making it easy to handle and reducing manufacturing costs. It is something that

Furthermore, one of the other main objectives of the present invention is to simplify the structure and to significantly improve the load bearing capacity of the clamp itself by inserting and welding the assembled parts. It is something.

Next, one of the other main objects of the present invention is to use the bolt holes in the steel beams for mounting the clamp, which makes it easy to ensure accurate mounting, and also prevents the clamp from rotating loosely during use. This is done so that twisting of the wire can be effectively avoided.

Furthermore, one of the other main objects of the present invention is to enable clamp mounting regardless of the spacing between the bolt holes in the steel beam.

Furthermore, the various other objectives of the present invention will be made clear in the following explanations, and the present invention has been designed to achieve the appropriate effects of these characteristics. From the upper surface of the metal plate 1 where the holes 1a and 1a are formed, the rod end of the metal rod 2 forming the inverted U-shape is inserted into the hole 1 of the metal plate 1.
The metal rods 2 are welded and fixed on the upper and lower surfaces of the metal plate 1 by fitting the metal rods 2 so as not to protrude from the lower surface of the metal plate 1 than the metal rods 1a and 1a, and the metal rods 2 are provided between the mounting holes 1a and 1a. A pair of holes 1b and 1c
are the fixing hole for the bolt 3 and the slide hole for the bolt 3', and the bolt 3 is inserted into the fixing hole 1b for the bolt.
The bolt head 3a is welded to the upper surface of the metal plate 1, and the bolt 3' is loosely fitted into the slide hole 1c of the bolt 3' so as to be slidable and detachable. Nuts 5 and 5' were screwed onto the free ends of both bolts 3 and 3' through washers 4 and 4', and considerable design changes were planned accordingly. It is something.

The details of the present invention will be described below with reference to a typical embodiment shown in the drawings. Holes 1a to 1a and 1b and 1c are formed in a metal plate 1, typically an iron plate having a rectangular or other arbitrary shape. 1a-1
A metal rod 2 having an inverted U-shape and a bolt 3, which are separately prepared, are fitted into and fixed to the holes a and 1b.

Therefore, when installing the metal rod 2, holes 1a to 1
First, welding is performed on the circumferential surface of the metal rod 2 at the proximal position of insertion, and then welding is performed from the direction of the insertion end surface, and this welded end surface is polished to a smooth surface. It is something. Next, the bolt 3 is inserted into the hole 1b so that its head 3a abuts the upper surface of the metal plate 1 in the hole 1b, and is welded at this abutting position.

Further, the hole 1c is a slide hole so that the bolt 3' can be loosely inserted into the hole 1c.

Note that 4 represents a washer and 5 represents a nut. A clamp having such a configuration is inserted into the hole 1b relative to the bolt hole 6a of the beam steel material 6 that is scheduled to be lifted.
The bolts are inserted and welded into the bolts, and the bolts are inserted and welded into the bolts, and the nuts 5 are held to tighten the bolts, and the wires 7 are inserted therethrough for use.

The present invention has a characteristic configuration as described above, in particular, makes effective use of the bolt holes 6a that are generally provided in the steel material 6 for the middle beam, and provides slide holes corresponding to the intervals between the bolt holes 6a to 6a. Bolt 3' in 1c
By determining the insertion and insertion position of the clamp, the clamp can be inserted and fixed, and by simplifying the configuration of the clamp and improving the load capacity, we have overcome the defects of this type of lifting clamp in the past. This is so that it can be effectively corrected.

That is, in the conventional case, the clamping structure was lifted so that the edge of the steel material was inserted, and the construction of the clamping structure was complicated, which caused problems in terms of handling and cost, as well as other problems. When the object collides with an object, it often causes an accident in which the object is separated from the object.

The present invention effectively rectifies the deficiencies of the prior art and simplifies the configuration as much as possible, while at the same time fixing the rod 2 on the upper and lower surfaces of the metal plate 1 by welding.
This not only ensures good handling and low cost, but also avoids the risk of the rod 2 falling off due to tension during use, ensures sufficient robustness, and also allows the installation method to be screwed using a bolt rod. By adopting this structure, it was possible to completely avoid the fear of secession as in the previous precedent. Further, by opening such slide holes 1c, it is possible to determine the bolt positions based on the intervals between the bolt holes 6a to 6a, and by making it possible to tighten the clamp to the beam steel material with two bolts, This is designed to further promote load-bearing properties.

As mentioned above, the present invention provides a clamp that is easy to handle and effectively guarantees stable lifting, thereby preventing accidents during construction.
In particular, it is designed to prevent accidents such as falling beams, and to significantly improve work efficiency.

[Brief explanation of the drawing]

1 and 2 are perspective views showing a typical embodiment of the present invention, FIG. 3 is a sectional view of FIG. 1, and FIG. 4 is a perspective view showing a state of use. In the figure, 1...metal plate, 2...metal rod, 3...
Bolts, 4...washers, 5...nuts, 6...steel materials, 7...wires are shown.

Claims (1)

[Scope of utility model registration request] The rod end of the inverted U-shaped metal rod 2 is inserted from the upper surface of the metal plate 1 in which the holes 1a, 1a are formed, and the rod end is connected to the lower surface of the metal plate 1 through the holes 1a, 1a of this metal plate 1. The metal rod 2 is welded and fixed on the upper and lower surfaces of the metal plate 1 by fitting the metal rod 2 into the metal rod 2 so as not to protrude therefrom, and a pair of holes 1b and 1c opened between the mounting holes 1a and 1a of the metal rod 2 are inserted. , a fixing hole for the bolt 3,
This is the slide hole for the bolt 3', and the bolt 3 is inserted into the fixing hole 1b of this bolt, and the bolt head 3 is inserted.
a is welded to the upper surface of the metal plate 1, and a bolt 3' is loosely fitted into the slide hole 1c of the bolt 3' in a slidable and removable manner, and both bolts 3, 3' A clamp for lifting a beam, characterized in that nuts 5, 5' are screwed onto the free ends of the clamp through washers 4, 4'.