JP2708251B2 - Stair railing structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a stair railing structure most suitable for a metal stair.

[Conventional technology]

When a handrail is provided on a staircase made of a steel frame, a structure in which the handrail is fixed to a sasara girder of the staircase by welding or screwing is common.

However, in consideration of a case where the steel staircase is mainly installed outdoors, a molten zinc plating is applied as a rust preventive treatment, so that when the welding is applied, the plating layer is peeled off. Also, when using a screw stop, if a screw hole is formed before mounting, the distance between the screw holes may deviate from the distance between the screw holes formed on the handrail. Means that the plating layer is peeled off.

[Problems to be solved by the invention]

The present invention has been made in view of the above-described circumstances, and has as its object to provide a staircase handrail structure that can easily and reliably attach a handrail without eliminating peeling of a plating layer due to welding heat or screw hole formation.

[Means for solving the problem]

The present invention provides a handrail main body, a mounting arm protruding downward from the handrail main body and disposed outside the Sasara beam, an upper support member protruding from a part of the mounting arm and disposed inside the upper part of the Sasara beam, A lower support member protruding from the other part of the mounting arm and arranged inside the lower part of the Sasara girder, and fastening means for clamping at least one of the upper support member and the lower support member and the mounting arm with the Sasara girder; It is characterized by having.

When mounting, place the mounting arm provided on the handrail body outside the Sasara girder, place the upper support member inside the upper part of the Sasara girder, and place the lower support member inside the lower inside of the Sasara girder and tighten it with tightening means As a result, the handrail body is fixed to the Sasara girder. Therefore, at least one of the upper support member and the lower support member sandwiches the upper and lower portions of the Sasara girder between the mounting arms, so that there is no peeling of the plating layer due to welding, screw hole formation, and the like. The handrail can be easily and reliably attached without having to bring in the equipment.

(Example of the invention)

FIG. 2 shows a step 12 to which the present invention is applied. In the stairs 12, a pair of Sasara beams 16 are fixed to both sides (ends in the direction perpendicular to the paper surface) of a step plate 14 which is arranged horizontally and parallel to each other. The stairs 12 are installed by fixing both ends in the longitudinal direction of the sasara girder 16 to the building. Note that the stairs 12 are manufactured in advance by welding at a factory or the like, and the surface is coated with molten zinc.

The handrail main body 22 has a shape in which a plurality of handrails 26 are erected from a kasagi 24 arranged in parallel with the sasara 16, and is made of a metal square pipe or the like. A plurality of mounting arms 28 are integrally hung from the handrail body 22.

As shown in FIG. 1, the mounting arm 28 is disposed outside the Sasara girder 16, that is, on the side opposite to the step board 14 of the Sasara girder 16.

A mounting plate 32 as an upper support member protrudes from a vertically intermediate portion of the mounting arm 28. The mounting plate 32 has a hook 34 having a tip bent downward, and is in contact with the inside of the Sasara beam 16.

At the lower end of the mounting arm 28, a mounting bolt as a fastening means is provided.
36 is penetrated with the axis being horizontal. This mounting bolt
36 is the inside of the handrail 26 (left side in FIG. 1) and the sleeve 38 and L
A nut 44 is screwed into the tip end of the plate 42.
By screwing the mounting bolt 36 and the nut 44, the L-shaped plate 42
The standing piece 42A is in contact with the inside of the lower part of the Sasara girder 16 so as to sandwich the lower end of the Sasara girder 16 with the mounting arm 28.

 Next, the mounting procedure of this embodiment will be described.

The stairs 12 and the handrail body 22 are manufactured separately. Ie stairs
In the step 12, the step plate 14 and the Sasara girder 16 are manufactured by welding, and the molten zinc plating is applied. On the other hand, the handrail body 22 is made of metal to which the mounting arm 28 is integrally fixed, and the mounting arm 28 is subjected to molten zinc plating in a state where the mounting plate 32 is welded.

After stairs 12 are fixed to the building, handrail body 22
Place outside 16 In this case, the mounting plate 28 is attached to the mounting arm 28.
The handrail main body 22 is mounted on the Sasara beam 16 using the hooks 34 of the mounting plate 32. Here, the sleeve 38 and the L-shaped plate 42 are fixed to the mounting arm 28 using the mounting bolt 36. As a result, the standing piece 42A sandwiches the Sasara girder 16 between itself and the mounting arm 28, so that the handrail main body 22 is fixedly installed on the Sasara girder 16 via the mounting arm 28.

In this fixed state, a contact portion from the mounting arm 28 or a part of the L-shaped plate 42 to the step board 14 may be formed in order to reliably fix the movement of the handrail body 22 in the direction along the sasaspar girder 16. .

As described above, in the present embodiment, the stairs 12 and the handrail main body 22 can be manufactured at different locations, so that the construction period can be shortened. Further, the mounting arm 28 and the mounting plate 32 are not limited to the above configuration, and various modifications are possible. As an example, the attachment plate 32 and the L-shaped plate 42 may be used upside down, or the hook 34 of the attachment plate 32 may be fastened to the attachment arm 28.

〔The invention's effect〕

Since the present invention is configured as described above, it has an excellent effect that welding and screw hole formation are unnecessary, and the handrail can be fixed to the stairs easily and securely.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along the line II of FIG. 2 showing a staircase handrail to which the present invention is applied, and FIG. 2 is a side view showing a staircase mounting state. 12 ... Stairs, 16 ... Sasara girder, 22 ... Handrail body, 28 ... Mounting arm, 32 ... Mounting plate, 34 ... Hook, 42 ... L-shaped plate.

Claims (1)

(57) [Claims] 1. A handrail main body, a mounting arm protruding downward from the handrail main body and disposed outside a Sasara beam, an upper support member protruding from a part of the mounting arm and disposed inside the upper portion of the Sasara beam. A lower support member protruding from the other part of the mounting arm and disposed inside the lower part of the sasaspar girder, a fastening means for clamping at least one of the upper support member and the lower support member and the mounting arm, A staircase handrail structure characterized by having: