JPH0311501Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a hanging bolt fixture, especially a hanging bolt fixture used as a support for duct piping for ventilation air conditioning systems, etc., in places where special strength is required, such as in nuclear power plants. The suspension bolt mounting hardware and the embedded hardware are fixed by stud welding, reducing on-site work time and ensuring construction reliability.Also, the length of the suspension bolts can be easily adjusted, and many other improvements are possible. This provides an extremely practical hanging bolt fixture with advantages.

Fig. 3 is a side view showing an example of a conventional hanging bolt fixture, and Fig. 4 is a view showing Fig. 3 viewed from the R direction. , an embedded metal fitting 2 having legs 21 is embedded in the ceiling 1 during construction, and in the example shown in Fig. 3, an angle 3 is fixed to the embedded metal fitting 2 by arc welding, etc. A hanging bolt 4 is fixed by welding. FIG. 5 is a side view of another example of the conventional fixture, and FIG. 6 is a view of FIG. 5 viewed from the R direction. In this example, the channel material 5 is fixed to the embedded metal fitting 2 by welding or the like. A hanging bolt 4 is attached to it with a nut 6.

In these conventional fixtures, the embedded hardware 2
However, the angle or channel material must be welded in an upward position by arc welding, etc., and unless the welding is performed by a person with a reasonably high level of skill, the appearance will not pass the visual inspection, and the welding will fail. The strength of the welding bolt varies depending on the skill of the welder, and there are also drawbacks such as difficulty in adjusting the length of the hanging bolt.

This invention is an attempt to eliminate these drawbacks of the conventional one, and FIG. 1 shows a hanging bolt fixture 10 of this invention, in which an embedded metal fitting 2 having legs 21 is embedded in a ceiling 1, into which a hanging bolt is attached. Mounting hardware 31
are fixed by stud welding. Since it is stud welding, it can be welded in a short time of 1 to 2 seconds, and there is little difference in welding strength depending on the operator. 22 indicates a welded portion. The suspension bolt mounting hardware 31 has a configuration as shown in the side sectional view shown in FIG.
With the opening 3 facing down, the part 34 is welded to the embedded metal fitting 2, the tip of the hanging bolt 4 is screwed into the female thread 32, and fixed with a rotation locking nut 36.

Furthermore, in the hanging bolt mounting hardware of this invention, a peephole 35 is penetrated at a predetermined location in the hollow portion.
This is a hole drilled in a position where sufficient strength will be maintained if the hanging bolt is screwed in deeper than this hole, and this hole allows you to check whether the hanging bolt has been screwed in sufficiently deep, so that it can be used for subsequent hanging. The length of the hanging bolt can be easily adjusted by adjusting the screwing amount of the bolt.

The hanging bolt attachment device of this invention has such a structure, so (1) the welding time is short, 2 to 3 seconds because of stud welding, there is little variation in strength depending on the operator, and there is no need for spatter, which was previously necessary. There is no need for finishing such as slag removal, and on-site work can be done extremely easily, quickly, and reliably.
(2) If the welding conditions are met, the welded part has tensile and bending strength greater than that of the members. (3) It is easy to adjust the length of the hanging bolt. (4) Hanging bolts can be easily screwed in to a depth that exceeds the required strength. It has many advantages such as

[Brief explanation of the drawing]

Figure 1 is a side sectional view of the hanging bolt fixture of this invention, Figure 2 is a side sectional view of the mounting bracket, Figure 3 is a side view of the conventional fixture, and Figure 4 is Figure 3 taken from the R direction. 5 is a side view of another example of the conventional fixture, and FIG. 6 is a view of FIG. 5 viewed from the R direction. Explanation of symbols, 1...Ceiling, 2...Embedded metal fittings, 21...
Leg, 3... Angle, 4... Hanging bolt, 5... Channel material, 6... Nut, 10... Mounting tool of this invention,
31...Mounting hardware, 32...Female screw, 33...Hollow part,
34...Welding end, 35...Peephole, 36...Turn lock nut.

Claims (1)

[Scope of utility model registration request] For hanging bolt fittings in places where strength is particularly required, such as in nuclear power plants, welding of hanging bolt fittings with hollow parts with female threads cut on the inner periphery to embedded metal fittings such as iron plates embedded in the ceiling. 1. A hanging bolt fixture, which is fixed to the hanging bolt fixture, and wherein the hanging bolt fixture is provided with a peephole at a desired location to communicate between the outer periphery and the hollow portion.