JPH0427948Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a steel frame staircase in which the steps are prefabricated.

[Problem that the invention attempts to solve]

Steel-frame stairs with prefabricated treads are usually supported by the stringer at the tread part by welding both sides of the tread directly to the stringer, but in this structure, the rigidity in the longitudinal direction of the tread is Since this decreases, it is necessary to take measures to ensure rigidity, such as providing ribs that protrude in that direction.

This idea was created based on the actual situation of conventionally structured steel-frame stairs, and was designed to reduce the decrease in rigidity by supporting the stairs at the corners under the raised boards.

[Means for solving problems]

In this invention, the tread panel constituting one unit of the staircase is formed into a shape that integrates the tread and the lower tier board, and the lower tier panel is supported at the bottom of the tier board. By restraining the deformation of the stepped plates, rigidity in the longitudinal direction of the stepped plates is ensured, eliminating the need for special rigidity ensuring means.

There is a hook that hangs down from the tip of the tread in the direction of the tread.
On the other hand, each of the raised pieces bent into a U-shape is provided at the lower end of the raised board, so that the tiered board panel is formed into a √ (root) shape as a whole. A mounting piece having a shape that fits there is fixed in the triangular space between the rising piece and the recessed plate, and the hook of the tiered panel engages with the mounting piece of the upper tiered panel and is supported by this. Installed between the stringers, the staircase is constructed with mounting pieces bolted to the stringers.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment.

The steel-framed staircase A (hereinafter referred to as "stair A") of this invention is constructed by bolting a one-step tread panel 1 consisting of a tread 1a and a raised plate 1b to stringers 2, 2 below the raised plate 1b. It is something that

As shown in FIG. 1, the tier panel 1 consists of a tier 1a and a lower recessed plate 1b, and a hook 1c bent downward is provided at the tip of the tier 1a in the tread direction.
However, each of the raised pieces 1d bent into a U-shape is formed at the lower end of the recessed plate 1b, and the overall shape is √.

A mounting piece 3 having a shape that fits there is inserted into the triangular space sandwiched between the rising piece 1d and the recessed plate 1b of the tiered panel 1, and is welded and integrated into the tiered panel 1. There is. As shown in FIG. 2, a notch is provided on the side of the recessed plate 1b of the mounting piece 3, and the hook 1c of the lower step panel 1 engages with this notch.

The tiered panels 1 are installed sequentially from the upper tier side to the lower tier side while interlocking with each other, and the hook 1c of the lower tiered panel 1 is attached to the hook 1c of the upper tiered panel 1 as shown in FIGS. 1 and 2. At the same time as it engages with the notch of the mounting piece 3 while abutting against the pile plate 1b,
The stepped plate 1a is supported by the rising piece 1d that abuts against the bottom surface of the stepped plate 1a, and is installed between the side beams 2, 2.

After the tiered panel 1 is installed, the tiered panel 1 is supported by the stringer 2 by joining bolts 4 passing through the stringer 2 to the mounting pieces 3, as shown in FIG.

FIG. 3 shows a partial cross section of the tread 1a in the tread direction, and as shown here, the tread panel 1 is connected to the side girder 2 via the mounting piece 3 with bolts 4. . The nut 4' is fixed to the mounting piece 3 in advance by welding. is stringer 2
A groove is provided on the surface, and the outer surface is finished flush.

FIGS. 1 to 3 show an embodiment in which plastic tiles 5 are covered as a finishing material for a staircase A, and a non-slip 6 is attached to the nosing of the staircase.

A cover plate 7 may be attached to the rear side of the staircase A as shown by the chain line in FIG. 2 in order to improve its appearance. In this case, the cover plate 7 is supported by hook bolts 8 which are hooked onto the recess plate 1b.

In the embodiment shown in FIG. 4, mortar 9 is placed on the step board 1a as a finishing material for the stairs A.

In this embodiment, a lip 1e is provided at the nosing position of the stepped panel 1 to protrude upward by the thickness of the mortar 9.

As shown in the figure, the lip 1e is provided, for example, by intermittent welding an angled plate to the nosing.

The embodiment shown in FIG. 5 shows the installation state when the stepped panel 1 is hot-dip galvanized.

When hot-dip galvanizing is applied, generally no welding is performed when assembling the tiered panels 1, 1, so the tiered panels 1, 1 are attached to the mounting piece 3 below the recessed plate 1b as shown in . It is joined by a plurality of bolts 10 at the hook 1c position and the hook 1c position.

In this case, for convenience of bolt connection, the hook 1c is formed to be somewhat longer than in the case of weld connection.

In addition, when going up and down stairs A, as shown in
In order to avoid contact noise with the rising piece 1d due to the deflection of the stepped plate 1a, a slight distance is provided between the rising piece 1d and the lower surface of the stepped plate 1a.

Note that additional girders may be used for the side girders 2.

[Effect of idea]

This idea is as described above, and since the stairs are supported by the stringers at the lower position of the sill board, the rigidity of the stairs is ensured by the sill board and the rising piece, and a special means has been added for this purpose. There is no need to do this, and the structure can be simplified.

In addition, the tiered panel can be installed in a positioned state by simply engaging the upper tiered panel,
Assembling the stairs is completed by simply bolting the mounting pieces to the stringer, improving workability including installation workability, and at the same time, only two bolts are required for each step. The number of parts can be reduced.

Furthermore, in the embodiments shown in FIGS. 1 to 4, since the tier plate is supported by the rising piece that contacts the lower surface of the tier plate, the rigidity of the tier plate itself is increased, and the thickness of the plate plate can be reduced. Become.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional view showing an embodiment of the present invention, Figure 2 is a partially enlarged view, Figures 3- and 3 are partial sectional views in the tread direction, and Figure 4 is a mortar being poured 5th longitudinal sectional view showing an example when
Figure 1 is a longitudinal sectional view and a tread direction sectional view, respectively, showing an embodiment in which fitting is applied. A... Steel staircase, 1... Step panel, 1a...
...Step board, 1b...Kekomi board, 1c...Hook, 1
d...Rising piece, 1e...Rip, 2...Stringer,
3... Mounting piece, 4... Bolt, 4'... Nut, 5... Plastic tile, 6... Non-slip, 7... Cover plate, 8... Hook bolt, 9... Mortar, 10... Bolt.

Claims (1)

[Scope of utility model registration request] Consisting of a step board and a lower-side recess board, a hook hanging down from the tip of the step board in the direction of the tread surface is provided, and a rising piece bent in a U-shape is provided at the lower end of the recess board. In the triangular space formed in the shape of a letter and sandwiched between the rising piece and the recessed plate,
A tiered panel to which a mounting piece of a shape that fits is fixed is installed between the stringers by engaging the hook with the mounting piece of the upper tiered panel and supporting it, and then attaching the mounting piece to the side. A steel staircase constructed by bolting to girders.