JPS5834916Y2 - handrail fence post - Google Patents

Description

[Detailed description of the invention] The purpose of this invention is to reinforce handrail fence posts made of non-corrosive metal such as aluminum alloy with steel without changing the appearance or without fear of electrolytic corrosion. .

The outline of this idea is to house a reinforcing steel column inside a hollow handrail fence post, fix the spacing piece in two places with scissors, fix the upper end of the hollow column only to the cap, and expose the lower end of the reinforcing column. is the same as before, but is sufficiently reinforced without the risk of electrolytic corrosion.

The exposed lower ends of the reinforcement columns can be welded to the anchor plates and reinforcing bars buried in the building frame, simplifying on-site work.

The configuration of this invention will be explained below with reference to the illustrated embodiments.

In the figure, 1 is an aluminum alloy exterior hollow column, 2 is a steel internal reinforcement column, which has an insulating gap 3 between it and the inner circumference of the hollow column 1, and the part 2a exposed from the lower end of the hollow column 1 is fixed with floor concrete. be done.

In this case, the hollow column 1 has a screw fitting groove 4 formed during extrusion molding passed through the inner surface thereof.

Since the gap 3 in this embodiment is sufficiently wide, both edges of the fitting groove 4 protruding from the inner surface of the hollow column 1 do not touch the reinforcing column 2 as shown in FIG. 2, completely eliminating the risk of electrolytic corrosion. It is being prevented.

However, even if the gap 3 is not so wide or wide, there is no actual harm even if the upper edge of the fitting groove 4 comes into line contact with the surface of the reinforcing column 2 due to movement during use.

Electrolytic corrosion occurs when dissimilar metals come into surface contact and moisture remains in the gap, whereas in line contact, the moisture flows down and evaporates, leaving no moisture necessary for electrolytic corrosion.

It will be even safer if the wire contact surface is treated with anti-corrosion treatment, painting, etc.

FIG. 3 shows how the parts shown in FIG. 1 are assembled.

In this case, the hollow column 1 is fixed to a Kasagi (upper Azusa) 5 via a Kasagi mounting bracket 6 fixed to the upper end.

The mounting bracket 6 has a protrusion 7 on its lower surface that enters the upper end of the reinforcing column 2 without surface contact.

However, if the mounting bracket 6 is made of stainless steel and the hollow column 1 is made of aluminum alloy, there is no harm in surface contact.

In addition, the hollow pillar 1 has an insulating gap 3 at the height of the handrail lower frame 8.
Tightening bolts and nuts 11 are provided to penetrate and support the insulating spacing piece 9 interposed in the hollow column 1 together with the T-frame holder 10 on both sides of the hollow column 1, and the reinforcing column 2 also penetrates near the lower end of the hollow column 1 to form an insulating gap. 3 are provided with bolts and nuts 12 for fixing the insulating spacing piece 9 interposed therebetween.

Since the cap 5 of the embodiment shown in FIGS. 1 and 3 has a back plate and a belly plate integrated, it is placed on the mounting bracket 6 and set screws 13 are inserted from below.
This is the same as before.

Before that, the mounting bracket 6 is fixed to the offshore column 1 by screwing the push screw 14 into the fitting groove 4 of the column 1.

The tightening and fixing part between the exterior hollow column 1 and the reinforcement column 2 is provided concentrically with holes into which the spacing pieces 9 enter on both sides of the exterior hollow column 1 and holes through which bolts can pass through without touching on both sides of the reinforcement column 2. A spacing piece 9 with a bolt hole coaxial with each of the holes inserted into the holes on both sides of the exterior hollow column 1, washers 15 on both sides that hold the spacing piece 9 and the edge of the exterior hollow column hole together, and each of the holes, Consists of bolts and nuts that pass through the washer and are tightened and fixed.

In this way, the hollow column 1 and the reinforcing column 2 are assembled in the correct relative positions, erected on the required floor surface, the exposed end of the reinforcing column 2 is welded to an anchor plate, reinforcing steel, etc., and floor concrete F is poured and fixed.

Figure '3 shows an example in which both the reinforced column exposed part 2a and the hollow column 1 are strongly fixed with concrete.
As with the conventional structure without the reinforcing column 2, the hollow column 1 is cantilever-supported by itself with a strength corresponding to the bending strength of the hollow column 1.

However, most of the horizontal load bearing capacity as a support column is
For example, the hollow column 1 may have a thin wall and its lower end may be lightly buried in surface F (concrete).

If the inner surface of the hollow column 1 comes into surface contact with the reinforcing column 2 due to the icy coal load, electrolytic corrosion will occur, so an insulating material may be placed in advance in the insulation gap 3 by gluing or other method at a position where contact is likely to occur.

However, in this embodiment, due to the presence of the screw fitting groove 4, even if they make contact, it is a line contact, so this is not necessary.

In the above embodiment, various possible accessories are attached, but the mounting bracket protrusion 7 may be omitted and the horizontal load on the cap 5 is applied to the reinforcing column 2 via the upper part of the hollow column 1. .

The screw fitting groove 4 on the inner surface of the hollow column 1 or the protrusion provided therefor comes into line contact with the surface of the reinforcing column 5 to transmit the load.

Even if it is used as it is, there is no risk of electrolytic corrosion for the reasons mentioned above.

FIG. 4 shows a case where the Kasagi 5 is separated into a back plate and a belly plate.

Only the belly plate 5a is placed on top of the Kasagi mounting bracket 6 attached to the hollow column 1, and after screwing, the back plate 5 is fitted.

Figures 5 and 6 show a case where the cap is separated into a back plate 5 and a belly plate 5a, but the mounting bracket 6 is of a wedge type.

A pair of well-known sections 5a, 5a are fixed to the upper end of the hollow column 1 by a wedge 6b, as shown in FIG.

The lower part of the wedge 6b becomes a protrusion 7 and enters the upper end of the reinforcing column 2.

In this case, there is an advantage that the insulation gap 3 can be made smaller even though there is no screw fitting groove 4 as in the case of FIGS. 1 and 3.

Although the above has been explained using a small number of examples, this invention can be varied in various ways depending on the design conditions and the well-known techniques of the designer. It can be selected as appropriate from the shape, U-shaped steel, etc.

The use of the insulating spacer, the tightening bolts, the positions of the two fixing points, etc. are left to the well-known skill of the designer.

This idea involves inserting steel columns into the posts of a handrail fence made of rust-free metal such as aluminum alloy so that they do not come into contact with the inner surface, and fixing them at two points via insulating spacing pieces. The lower end can be welded and fixed to an anchor plate, reinforcing steel, etc. and concrete can be poured.

This is a convenience that could not have been considered with conventional aluminum alloy columns.

The upper and lower tightening bolts that separate the inner and outer columns at two locations are also provided at the location where they are buried in the concrete I and at the location where the lower frame 8 is attached, as in the above embodiment, so that they do not come out to the outside at all.

You can also choose a position where there is no problem even if the bolt head or nut is exposed to the outside.

The economic advantage of this idea is that the insulation between the inner and outer columns to prevent electrolytic corrosion is the least expensive air layer, the reinforcing columns do not require special anti-rust treatment, and the hollow columns are thin.

However, the most important effect is that aluminum alloy handrail fences, which are considered to be inferior to steel ones in terms of strength, can be sufficiently strengthened with this invention without compromising their beautiful appearance, making them particularly useful as handrail fences for high-rise buildings. This is a revolutionary improvement in safety.

[Brief explanation of drawings]

Fig. 1 is an exploded explanatory view of one embodiment of this invention, Fig. 2 is a top view of its support, and Fig. 3 is an assembled sectional view of the embodiment of Fig. 1.
Figures 4 and 5 are exploded explanatory views of the other two embodiments, and Figure 6 is the fifth embodiment.
This is an assembled sectional view of the embodiment shown in the figure. In the figure, 1 is an exterior hollow column, 2
indicates the internal reinforcement column, 3 indicates the insulation gap, and F indicates the floor.

Claims (1)

[Claim for Utility Model Registration] Includes an exterior hollow column and an internal reinforcing column inserted into the exterior hollow column. The above-mentioned tightening and fixing parts are attached to both sides of the exterior hollow column. Holes into which the spacing pieces enter, and holes that allow bolts to pass through without touching are provided on both sides of the reinforcing column. A support for a handrail fence comprising washers on both sides that hold down both the spacer piece and the edge of the exterior hollow post hole, and bolts and nuts that pass through the holes and washers and are tightened and fixed.