JPH0835307A - Concrete stair - Google Patents

Abstract

PURPOSE:To easily install handrails on a concrete stair by engaging projections provided on stair landings and side plates of step plates with cutout recessed grooves provided on inside lower parts of the precast concrete handrails. CONSTITUTION:Handrails 11 for stair landings on the side of a building are installed on both sides of the stair landings 3 to cover side surfaces of the stair landings 3, and projections 16 of the side surfaces of the stair landings 3 are engaged with cutout recessed grooves 15 on lower parts of the handrails 11. Additionally, handrails 12 for step plates 2 are installed along the whole length oh the step plates 2 and parts of upper and lower plates of the stair landings 3 to cover their side surfaces, and the projections 16 on the side surfaces of the step plates 2 are engaged with the cutout recessed grooves 15 on the lower part in the same way. Thereafter, handrails 13 for the stair landings 3 are installed on the stair landing on the upper part of the step plates 2 in such a way as to cover its side surface, and the projections 16 on the side surfaces of the stair landings 3 are engaged with the cutout recessed grooves 15 on the lower part. It is possible to easily construct a concrete stair furnished with concrete handrails by making the handrails as precast concrete handrails and installing the handrails by engaging the projections provided on the side surfaces of the stair landings and the step plates with the cutout recessed grooves provided on their inside lower end parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete stair such as an assembly stair or a cast-in-place concrete stair.

[0002]

2. Description of the Related Art Generally, when constructing an outdoor staircase made of concrete or the like, the handrail is constructed integrally with concrete or is made of metal. This metal handrail does not look good and cannot be used in high-grade condominiums, etc., and requires regular maintenance.
For this reason, concrete handrails are integrally formed on outdoor stairs of high-grade apartments and the like as described above.

[0003]

Since this concrete handrail is constructed in-situ and integrally, it requires a skilled technician and is extremely necessary for marking out and assembling and dismantling the formwork. It was a complicated and time-consuming task.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a concrete staircase having a concrete handrail which can be easily constructed.

[0005]

[Means for Solving the Problems] A concrete staircase for achieving the above-mentioned object is attached to a side surface of a landing and a step board so that a precast concrete handrail covers the side surface, and is attached to a lower part inside the precast concrete handrail. It is characterized in that the projection provided on the landing and the side surface of the step plate is engaged with the notched concave groove provided, and the precast concrete handrail is characterized in that the tile is pre-applied to the outer surface. The handrails are erected on the upper end surface of the precast concrete handrail at appropriate intervals, and the top bar is bridged over the upper ends of these handrails.

[0006]

As described above, the handrail is a precast concrete handrail, and the precast concrete handrail is attached by engaging the notches formed in the lower end portion of the inside of the precast concrete handrail with the projections provided on the landing and the side surface of the step board. This allows a concrete staircase with a concrete handrail to be easily constructed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of concrete stairs according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of the assembly stairs, FIG. 2 is a plan view of the same, and FIG. 3 is a sectional view of the same.

[0008] As shown in FIG.
It is composed of a wall pillar 1, a step board 2, a landing board 3 and a handrail 4,
These are all made of precast reinforced concrete.
By assembling these members on site, an outdoor staircase such as an apartment is constructed.

In this assembled stair A, step plates 2 are attached to both side surfaces of a wall pillar 1 in different directions, these step plates 2 are connected to upper and lower landing plates 3, and these landing plates 3 and step plates are connected. A handrail 4 is attached to the side surface of 2.

The wall column 1 is formed by joining a wall plate 1a up and down with a joint bolt 5. When the step board 2 is attached to the wall post 1, the side of the step board 2 is attached to the wall post 1.
The bolt 7 is inserted into the mounting groove 1b and the bolt 7 inserted into the step 6 is screwed into the fixing bracket 8 in the mounting groove 1b.

As shown in FIG. 5, the fixing member 8 is composed of a U-shaped fixing plate 8a and anchor bars 8b welded to both sides of the fixing plate 8a. The fixing bracket 8 is attached to the mounting groove 1b of the wall post 1 by the front plate 8
c is buried in a state where it is exposed from the wall surface, and a work space 9 for screwing the bolt 7 is formed in the rear wall column 1.

A landing plate 3 fitted to the wall column 1
And the landing plate 3 connected to the building side is a connecting plate 10
Are joined to the step plate 2 respectively.

The handrail 4 is a handrail 11 for the landing board on the building side.
And a handrail 12 for a step board and a handrail 13 for a landing board, which are divided into three parts and attached, and each outer surface is covered with a tile 14.

The building side landing plate handrails 11 are attached to both sides of the building side landing plate 3 so as to cover the side surfaces thereof. The projecting portion 16 on the side surface of the landing plate 3 is fitted into the cutout groove 15 in the lower portion of the landing plate handrail 11 on the side of the building, and the L-shaped attachments are attached along the cutout groove 15 at appropriate intervals. The connecting plate 17 is the protrusion 1
6 is welded to the plate 18 on the upper surface (see FIG. 8).
In addition, a joint between the landing plate handrail 11 and the landing plate 3 on the building side is sealed with a sealing material 19 and a caulking material 20.

The handrail 12 for the step board is attached to the entire length of the step board 2 and part of the landing plate 3 above and below the step board 2 so as to cover these side surfaces. Similarly to the above, the projection 16 on the side surface of the step board 2 is fitted into the lower notch groove 15, and the L-shaped connecting plate 17 attached to the upper groove 15 a of the notch groove 15 is attached to the step plate 2. (See FIG. 9). The mortar 21 is filled from the inside of the upper groove 15 a to the upper part of the step board 2, and a joint between the handrail 12 and the step board 2 is sealed with a seal material 19 and a caulking material 20.

The landing plate handrail 13 is attached to the landing plate 3 above the step board 2 so as to cover the side surfaces thereof. This landing plate handrail 13 is divided into two half handrails 1
3a is joined at the joining portion of the landing board 3 to form a semicircle.

This is also the same as the above, the lower notch groove 15
Then, the projections 16 on the side of the landing plate 3 are fitted together, and L-shaped connecting plates 17 attached at appropriate intervals along the cutout grooves 15 are welded to the plate 18 on the upper surface of the projections 16 ( See FIG. 8). The joint between the handrail 13 and the landing plate 3 is sealed with a sealing material 19 and a caulking material 20, respectively.

In the assembling method of the assembling stairs A, first, the wall column 1 joined with the wall plate 1a is self-supported by the support. Then, the step board 2 is lifted by a crane or the like and installed on one side of the wall post 1, and the bolt 7 inserted into the step 6 is screwed into a fixing bracket 8 of the wall post 1 to fix the step board 2. The step board 2 is fixed to the opposite surface of the column 1 in the same manner, but in a different direction. The bolts 7 are all screwed into the fixing fittings 8 on the side of the wall pillar 1.

The upper and lower portions of the step boards 2 are joined to the landing board 3 and the landing board 3 on the building side.
To the corridor floorboard 22 of the building. Next, handrails 4 are attached to the side surfaces of the step board 2 and the landing board 3 to construct a stair for one floor.

After constructing the stairs for one floor in this manner, another wall pillar 1 is spliced onto the wall pillar 1, and the stairs on the upper floor are assembled in the same manner as described above to obtain a predetermined height. Build an assembling staircase.

FIG. 10 shows another embodiment of the assembly stair A, in which handrails 23 are provided on the upper end surface of the handrail 4 at appropriate intervals, and a top bar (Kasaki) is provided on the upper end of these handrails 23. 24 is provided.

Further, the assembling stair A has been described in the present embodiment, but it is of course applicable to not only the assembling stair A but also the concrete stair constructed with cast-in-place concrete.

In this case, the landing and the step board are constructed integrally from cast-in-place concrete, and then the handrails are attached to the side surfaces of the landing and the step board by the same method as described above. Therefore, the landing and the projections on the side surfaces of the steps are to be integrally constructed in advance.

[0024]

EFFECTS OF THE INVENTION Precast concrete handrails are attached to the side surfaces of the landing and the step plates so as to cover the side surfaces, and projections provided on the side surfaces of the landing and the step plates are provided in the notch groove provided in the lower inside of the precast concrete handrail. By engaging the portions, the handrail on the concrete stairs can be easily attached.

By using precast concrete as the handrail in the concrete stairs, the work process and work efficiency can be improved.

Since the precast concrete handrail has tiles attached to the outer surface in advance, finishing work can be omitted, so that work efficiency can be improved.

Handrails are erected on the upper end surface of the precast concrete handrail at appropriate intervals, and a top bar (casing) is stretched over the upper ends of these handrails, so that handrails made of concrete and metal can be easily formed. Can be attached to

[Brief description of drawings]

FIG. 1 is a front view of an assembly staircase.

FIG. 2 is a plan view of an assembly staircase.

FIG. 3 is a sectional view of an assembly staircase.

FIG. 4 is a front view of a connection portion of the wall plate.

FIGS. 5A and 5B are cross-sectional views of a joint between a wall column and a step board.

FIG. 6 is a cross-sectional view of a joint portion between the upper part of the step plate and the landing plate.

FIG. 7 is a cross-sectional view of a joint between a lower part of a step board and a landing board.

FIGS. 8A and 8B are cross-sectional views of a joint between a handrail and a landing plate.

FIGS. 9A and 9B are cross-sectional views of a joint between a handrail and a step board.

FIG. 10 is a front view showing another assembly staircase.

[Explanation of symbols]

 A Assembly stairs 1 Wall post 2 Step board 3 Landing board 4 Handrail 5 Joint bolt 6 Step 7 Bolt 8 Fixing bracket 9 Work space 10, 17 Connecting plate 11 Handrail for landing board on building side 12 Handrail for step board 13 For landing board Handrail 14 Tile 15 Notch groove 16 Projection 18 Plate 19 Sealing material 20 Caulking material

Claims (3)

[Claims] 1. A precast concrete handrail is attached to a side surface of a landing and a step board so as to cover the side surface, and a projection provided on a side surface of the landing and step board is provided in a notch groove provided in an inner lower portion of the precast concrete handrail. Concrete stairs characterized in that the parts are engaged. 2. The concrete stairs according to claim 1, wherein the precast concrete handrail has tiles preliminarily attached to the outer surface thereof. 3. The concrete stairs according to claim 1, wherein handrails are erected on the upper end surface of the precast concrete handrail at appropriate intervals, and a top bar is bridged over the upper ends of these handrails. .