JPH0437152Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to an assembled staircase constructed by assembling members made of precast reinforced concrete.

<Prior Art and Problems> In buildings such as housing complexes and apartments, stairs attached to the outside of the building have generally been made of cast-in-place reinforced concrete. however,
Nowadays, as buildings themselves are increasingly constructed using precast reinforced concrete, and construction periods are being shortened, it is required that such stairs also be constructed of precast reinforced concrete. In order to make stairs into precast reinforced concrete, the steps must be divided into several parts, fabricated from precast reinforced concrete, and assembled together. ), there are problems in that more types of members are required, resulting in higher costs, and the number of joints between members increases, making assembly work more complicated.

The present invention has been made in view of the above-mentioned conventional circumstances, and it is an object of the present invention to provide an assembled staircase that can be assembled using fewer types of members and that realizes the use of precast reinforced concrete stairs.

<Means for solving the problems> The prefabricated staircase of the present invention includes a stair body in which a central pillar part, a step plate part, and a beam part protruding from the central pillar part are integrally molded with precast reinforced concrete; a landing board molded from precast reinforced concrete to be attached, and when the stair main bodies are stacked up with the positions of the step board parts staggered with respect to the middle pillar parts and the middle pillar parts are connected to each other, The present invention is characterized in that support parts that support the landing board together with the beam parts are provided at the upper edge of the step plate of the lower stair main body and at the lower edge of the step plate of the upper stair main body.

<Function> Stair bodies are stacked in multiple stages by alternating the positions of the tread parts with respect to the middle pillar part, and these middle pillar parts are connected to each other. The landing board is attached to the stair main body by being supported by the support part provided at the bottom of the stair case, and the support part and beam part provided at the lower edge of the step board part of the upper stair main body, and the stairs are assembled.

<Example> The assembly staircase of the present invention will be specifically explained based on an example.

FIG. 1 is a perspective view of an assembled staircase according to an embodiment of the present invention, FIG. 2 is a perspective view of the disassembled state, and FIGS. 3 a to 3 e are perspective views showing the assembly process. .

As shown in the figure, the assembled staircase is composed of a staircase main body 1 and a landing board 10, and the staircase main body 1 is constructed by integrally molding a middle pillar part 2, a step board part 3, and a beam part 4 with precast reinforced concrete. The landing board 10 is also formed from precast reinforced concrete.

At the lower end of the middle pillar part 2, as shown in FIG.
Sleeve splice joint 5 as connection means
is buried, the middle pillars 2 are stacked together, and the reinforcing bar 2a of the middle pillar 2 on the lower floor is inserted into the sleeve splice joint 5 of the middle pillar 2 on the upper floor.
By filling the sleeve splice joint 5 with mortar, the reinforcing bars 2 of the middle column part 2 on the upper floor side
b and the reinforcing bars 2a, it is possible to connect the middle pillar portions 2 on the upper floor side and the lower floor side.

The stepped plate part 3 is provided diagonally on one side of the middle pillar part 2 from the upper end to the lower end of the middle pillar part 2,
It consists of multiple steps. The upper edge 3a and the lower edge 3b of the stepped plate portion 3 serve as support portions that support the landing board 10 from below. These supporting parts are provided with connecting iron plates 6, as shown in FIG. 5, which takes the lower edge 3b as an example.
Pass the iron plate 8 between the connecting iron plate 7 and the iron plate 6 provided on the landing board 10, and connect these iron plates 6, 6 with bolts 9.
The support portion is connected to the landing board 10 by joining 7 and 8 and filling this joint with a sealing material 11 and mortar 12.

The beam portion 4 projects laterally from the upper end of the middle column portion 2, and supports the landing board 10 from below together with the support portions 3a and 3b of the step plate portion 3.
Note that this beam portion 4 is also connected to the landing board 10 by known means such as welding or bolt fastening.

Figure 3a shows the assembly procedure for the assembly stairs with the above configuration.
-e will be explained. First, the foundation and the lower part of the floor are made using cast concrete on site, and the main body of the staircase 1 is placed on top of this and connected (Fig. 3a). Then,
On this stair main body 1, a step plate part 3 is placed against the middle pillar part 2.
Stack other stair bodies 1 on top of each other by alternating them, and connect these middle pillar parts 2 to each other (FIG. 3b). Next, the landing board 10 is supported by the upper edge 3a of the step plate part 3 on the lower floor side, the beam part 4, and the lower edge part 3b of the step plate part 3 on the upper floor side, and the landing board 10 is attached to the main body of the staircase. 1 (Fig. 3c). Next, the staircase body 1
are further piled up and connected (Fig. 3 d), and the landing board 10 is attached (Fig. 3 e) to assemble the stairs for the desired number of floors.

The staircase assembled in this way has the staircase main body 1 as 2.
The height of two stacked is the height of one floor of a building.
Then, the stair main bodies 1 of the same shape are stacked up with the tread portions 3 in alternate positions, and the landing boards 1 of the same shape are stacked.
Since a staircase of any height can be assembled by attaching the stairs, the number of types of parts required is extremely small, and the assembly work is simple. In addition, Figures 1 and 2
As shown in the figure, in this embodiment, the uppermost center pillar part 2' and the landing board 10' are different in shape from the other middle pillar parts 2 and the landing board 10. It is also possible to make the landing board and landing board the same shape as the others.

The stairs assembled as described above are attached to the building 15 as shown in FIGS. 6 and 7, for example, depending on the installation conditions, and are used as external stairs. By attaching the stairs to the building 15 in this manner, the stairs are supported via the step board portion 3, the beam portion 4, the landing boards 10, 10', etc., and therefore have sufficient strength and rigidity against lateral loads.

In the above embodiment, the middle column part 2 is connected with the sleeve splice joint 5, and the support part 3 is connected with the sleeve splice joint 5.
A, 3b and the landing plate 10 are connected by bolts 9, but the present invention is not limited to these, and connection may be made by other known means such as welding.

<Effects of the invention> According to the prefabricated staircase of the invention, stairs of any number of floors can be easily obtained using an extremely small number of materials made of precast reinforced concrete, significantly shortening the construction period and significantly reducing costs. can be realized.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an assembled staircase according to an embodiment of the present invention, Fig. 2 is a perspective view of its disassembled state, and Figs. 3 a to e are perspective views showing the assembly steps of the assembly staircase, respectively. Figure 4 is a front view of the connecting part of the center pillar part, Figure 5 is a sectional view of the connecting part between the support part and the landing board, and Figures 6 and 7 are perspective views showing the usage of the assembled staircase. It is a diagram. In the drawings, 1 is the stair main body, 2 is the middle pillar part, 3 is the step plate part, 3a is the upper edge (support part), 3b is the lower edge (support part), 4 is the beam part, and 5 is the sleeve splice joint. 9 is the bolt, and 10 is the landing board.

Claims (1)

[Scope of utility model registration request] A stair main body in which a middle column part, a step board part, and a beam part protruding from the middle pillar part are integrally molded from precast reinforced concrete, and a landing board formed from precast reinforced concrete attached to the stair main body, and the step board When the stair main bodies are stacked and the middle pillars are connected to each other by alternating the positions of the stair pillars with respect to the middle pillars, the supporting parts that support the landing board together with the beam parts are connected to the lower floor stair main body. An assembled staircase characterized in that it is provided at the upper edge of the tread part of the upper staircase body and the lower edge of the tread part of the upper staircase main body.