JPS6036655Y2 - hanging bolt - Google Patents

Description

[Detailed description of the invention] The present invention relates to a suspension bolt, particularly a suspension bolt used for suspending a ceiling base material from a roof girder material or an upper floor base girder material to a ceiling construction space in a lightweight steel ceiling base structure. It is something.

Figure 1 shows an example of a lightweight steel frame ceiling base structure, in which a plurality of equally spaced and parallel field edges B are arranged perpendicularly to the lower surface of a plurality of field edges A arranged at equal intervals and parallel to each other. Then, they are connected at the intersection using connecting fittings as appropriate, and the ceiling base material consisting of the roof edge support A and the roof edge B is connected to the ceiling structure by hanging bolts C suspended from the roof girder material or the upper floor base girder material. It is suspended in a space, and a ceiling board (not shown) is installed on the lower surface of the field edge B.

In addition, Fig. 2 shows another lightweight steel frame ceiling base structure, in which side plates are erected on both sides in the length direction of the elongated bottom plate a, and fittings facing the upper and lower ends of the side plates are installed. A ceiling base material X is used in which an insertion groove C is formed and a mounting piece d is horizontally protruded outward from the bottom of both side panels, and this ceiling base material X is moved in four directions using appropriate connecting fittings (not shown). Connect each base material
At the other end, connecting fittings are used to connect the base materials X in four directions, and by sequentially connecting the base materials X in this way, a large number of rectangular frames are formed.

Then, the ceiling base material X shaped into a rectangular frame is used as a roof girder material,
It is suspended in the ceiling construction space by hanging bolts e hung vertically from the upper floor base girder material, and the ceiling board is placed and supported on the placement piece d of the base material X in each rectangular frame body.

In the ceiling base structure shown on each side above, suspension bolts C and e for suspending the ceiling base material are metal round rods with screw grooves.

A large number of hanging bolts are used to suspend the base material, but since the hanging bolts are round rods, they themselves have considerable weight, and when the weight of the entire ceiling is added, the roof girder material and the upper floor Considerable weight is applied to the base girder material.

Furthermore, since the rod is a round rod, each hanging bolt is expensive.

The present invention was devised in view of the above-mentioned ceiling underlayment hanging bolt, and one embodiment of the present invention will be described in detail below with reference to the drawings.

Figures 3 and 4 show the hanging bolt according to the present invention.
Reinforcing grooves 2 are formed along the longitudinal direction of each plane of a metal cylindrical body 1 having a hexagonal cross section, and thread grooves 3 are formed on the surface of the cylindrical body 1.

When molding the cylindrical body 1, the cylindrical body is formed into a hexagonal shape, and the four threads 2 are provided to form the screw grooves 3, or the elongated plate is molded into a hexagonal shape by passing through a molding roller and the grooved threads 2 are formed. Various methods can be considered, such as recessing, welding the longitudinal joints, and then carving the threaded grooves 3.

The hanging bolt of the present invention has the above-mentioned structure, and by using the cylindrical body 1, the weight can be reduced, and since the cross section is hexagonal and each plane has reinforcing grooves 2, it has not only tensile strength but also bending strength. It is also strong enough, and the thickness is uniform throughout, making it sturdy.

Even if the thread grooves 3 are carved on the surface, the grooves are deep at each corner, so that they can withstand tightening of nuts sufficiently.

In addition, the cylindrical shape saves material and can be provided at a low price, making it ideal as a hanging bolt for ceiling foundations.

In the above embodiments, the case where the hanging bolt is a cylindrical body with a hexagonal cross section is explained, but it is also possible to make it pentagonal or hexagonal, and the bolt of the present invention can also be used for purposes other than simple hanging bolts. Of course it's a good thing.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of a conventional ceiling base structure;
The figure is a perspective view showing another example, FIG. 3 is a partial plan view showing one embodiment of the suspension bolt of the present invention, and FIG. 4 is a sectional view taken along the line I--I in FIG. 3. 1 is a cylinder, 2 is a groove, and 3 is a screw groove.

Claims (1)

[Scope of utility model registration request] Polygonal cylindrical body 1 with grooves 2 formed along the length direction of each plane
A hanging bolt characterized by having a thread groove 3 carved in the.