JPS6015858Y2 - spiral staircase handrail - Google Patents

Description

[Detailed description of the invention] This invention relates to a handrail for a spiral staircase that is installed in communication with the passageway of the spiral staircase and maintains sufficient rigidity for the staircase, and in particular relates to the structure of the handrail material. It is.

FIG. 1 shows the elevation of a general outdoor spiral staircase using handrails according to the embodiments described later. A central column 3 is erected, a large number of stepped plates 4 are radially fixed at fixed arc intervals on the outer periphery of the central column 3 at a constant height pitch, and a plurality of stepped plates 4 are erected at the tip of each stepped plate 4. In addition to being formed by the stair lattice vertical bars 5 and handrails 6 mounted so as to connect the upper ends of each vertical bar 5, the middle pillars 3 are provided at a required height to form an entrance/exit passageway to the stairs. The base of the landing 7 is attached, and the distal end of the landing 7 is locked onto the landing foundation 8 of the building 1.

By the way, solid metal rods are often used as handrail materials for conventional staircases of this type, and these metal rods are bent into the required spiral shape at a factory.

However, the dimensional accuracy and assembly dimensional accuracy of each part of the staircase is considerably lower than that of general mechanical structures, so it is difficult to locate the handrails when screwing them to the vertical lattice bars during on-site construction. It is unavoidable that differences will occur, and for this reason, in the past, workers at the site used their experience and ingenuity to appropriately absorb differences, but this absorption method requires a lot of effort and effort. In the past, the drawback was that construction workability was extremely poor.

The present invention has been made in order to eliminate the above-mentioned drawbacks. Namely, the purpose of the present invention is to easily absorb the difference in the mating position during assembly, and to make it possible to improve the side structure of the stairs. To provide a handrail that can maintain sufficient rigidity.

Hereinafter, the present invention will be explained based on an illustrated embodiment.

The handrail of the embodiment has no particular restriction on the shape of the curved shape in the longitudinal direction; that is, like the handrail 6 described above, it can be freely formed according to the design dimensions of each spiral staircase.

As shown in FIGS. 2 and 3, the handrail material is formed using a steel flexible tube 9 as the core material.
A soft resin coating 10 is applied as a single piece by extrusion molding, and the tube 9 is a single tube with both longitudinal edges folded inwardly and outwardly into a U-shaped cross section. The long steel strip 11 has spiral turns lla, llb, llc.
. . . are formed into a spiral shape by interlocking the turn edges of the adjacent U-shaped cross sections, and the covering layer 10 is made of a resin material that is weather resistant and has a good feel. is used, and soft PVC is used in the illustration.

According to the handrail 6 of the embodiment configured in this way, due to the flexibility of the tube 9, the assembly can be carried out by pressing the handrail 6 and the lattice vertical bars 5 together at the site due to the misalignment of the positions at the time. It is possible to absorb it very easily, and if it is fixed with screws at the intervals of the lattice vertical bars 5 in a normal spiral staircase, the rigidity of the structure of the side of the staircase between the vertical bars and the adjacent vertical bars will be reduced at each turn. 11a, 11b,...
Due to the rigidity of the steel material, it is possible to maintain a robustness close to that of a rigid body, and as a result, there is no risk of the structure shaking or loosening.

Furthermore, the protective effect of the covering layer 10 prevents corrosion and deterioration caused by rainwater, etc., and the low heat conductivity and softness of the resin material prevents the user from feeling uncomfortable when touching the handrail.

As described above, according to the handrail for a spiral staircase according to the present invention, the core material is made of a steel flexible tube whose covering layer is formed of a soft resin layer, and a long copper strip is formed into a spiral shape. Since the adjacent edges of each turn of the steel strip are folded back to form a U-shaped cross section and are interlocked with each other, the handrail can be easily bent and expanded and contracted when assembling the handrail. Assembly facilitates on-site adjustment of irregularities between positions.

In particular, when adjusting the above-mentioned handrail by bending and expanding/contracting, the adjustment is made by the meshing of the U-shaped cross-sectional paths of the handrail core material moving inwardly or outwardly. Therefore, the adjustment work becomes easier, and there is no risk that the handrail will come up from the mounting area even if the rear set screw or the like becomes loose during adjustment and installation.

[Brief explanation of the drawing]

Fig. 1 is an elevational view of a handrail of a spiral staircase showing one embodiment of the present invention, Fig. 2 is a side view showing a section of a part of the handrail material of the handrail of Fig. 1, and Fig. 3 is a , is an enlarged view of part (2) in FIG. 6... Handrail, 9... Flexible tube, 10... Covering.

Claims (1)

[Scope of utility model registration request] In a handrail for a spiral staircase, the steel flexible tube is formed of a core material and a soft resin layer that covers the core material;
A long steel strip whose longitudinal edges are folded inwardly and outwardly into a substantially U-shaped cross section is formed into a spiral shape, and each turn of the spiral steel strip is folded into the substantially U-shaped cross section. A handrail for a spiral staircase characterized by a shape in which adjacent edges are interlocked with each other.