JP3303078B2 - Assembling stairs and construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prefabricated staircase and a method of constructing the same.

[0002]

2. Description of the Related Art In a house or a building having two or more floors (hereinafter simply referred to as a building), stairs are provided for ascending and descending between an upper floor and a lower floor. For example, in the case of a steel staircase, the stairs are installed in a so-called prefabricated form in which a predetermined number of step boards and a burr board are attached to a pair of slabs arranged in parallel at predetermined intervals in a factory or the like. After being transported to the building site in the state of being completed, it is carried into the building and attached to a predetermined position. And, this installation requires that the weight of the prefabricated stairs be 50
Since it weighs about 0 kg, it is done using a crane or the like.

[0003] If the stairs are installed far from the place where the cranes and the like are installed, a large crane and the like are required only for the installation of the stairs, and the installation cost is relatively high. Further, since it is necessary to use a crane or the like, there is a restriction in the process that the stairs must be installed at the same time as the steel frame assembly.

[0004] Therefore, from the viewpoint of reducing the installation cost and increasing the degree of freedom of the installation process, there is a demand for a stair that can be installed without using a crane or the like.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a staircase which can be installed without using a crane or the like, and a method for constructing the staircase. .

[0006]

[0007]

[0008]

SUMMARY OF THE INVENTION The assembled staircase of the present invention comprises:
A receiving member having a predetermined number of receiving portions provided at predetermined intervals, and a predetermined number of serrated stair members attached to the receiving portion after the receiving member is attached to the building, An upper mounting portion is formed at the upper end of the serrated stair member so as to overlap with the receiving portion, and a lower mounting portion pressing the lower mounting portion is formed at the lower end member of the serrated stair member. And a clamping portion protruding beyond the receiving portion is formed in a part thereof, and at least one of the saw-tooth-shaped step members is fixed to the upper mounting portion together with the receiving portion at the lower side of the upper step. By being fixed to the receiving portion while being clamped by the mounting portion and the holding portion formed thereon, the lower mounting portion clamps the receiving portion and the upper mounting portion of the lower stage between the receiving portion and the upper mounting portion. Is the fact characterized.

[0009]

[0010]

[0011] In the method for constructing a prefabricated staircase according to the present invention, an upper mounting portion is formed at an upper end portion of the lower mounting portion, the upper mounting portion being overlapped with a receiving portion of the lower mounting portion. A method for constructing an assembling staircase using a saw-toothed staircase member having an upper mounting portion and a lower mounting portion, wherein a holding portion is formed and a holding portion protruding beyond the receiving portion is formed in a part thereof. And mounting a receiving member having a predetermined number of receiving portions provided at predetermined intervals at a predetermined position in the building, and mounting the lower mounting portion and the lower mounting portion to the holding portion. And a step of clamping the upper mounting portion together with the receiving portion to the lower mounting portion and the clamping portion of the upper mounting portion.

[0012]

The assembled staircase according to the present invention is constructed as described above, so that each member is light in weight and can be installed without using a crane or the like. Further, since installation can be performed without using a crane or the like, the installation time is not limited to the time of assembling the steel frame, and the degree of freedom in the installation process of the stairs is increased.

Further, in the method of constructing the assembling stairs of the present invention, the stairs are formed only by sequentially attaching the serrated stair members from below to the receiving portions of the receiving members.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1 FIG. 1 shows an assembled staircase according to Embodiment 1 of the present invention.
The assembling stair 1 includes a pair of receiving members (saraspars) 2, 2 provided in parallel at predetermined intervals, and a predetermined number of saw-tooth steps 3 fixed to the receiving members 2. Become a major component.

In the first embodiment, the receiving member 2 is, for example, a lightweight grooved steel having a blade 2a as an upper surface, and a seat plate 4 is mounted on the upper surface at a predetermined interval to form a receiving portion 21. I have. The sawtooth-shaped step member 3 is attached to the receiving portion 21. Specifically, this attachment is performed as follows. That is, a lower mounting portion 31 parallel to the receiving portion 21 is formed at the lower end portion of the serrated staircase member 3 in advance, and when the lower mounting portion 31 is mounted on the receiving portion 21 at the upper end portion, An upper mounting portion 32 parallel to the receiving portion 21 is formed, the position of which is adjusted so that the gap 5 in which the lower mounting portion 31 of the upper stage can be sandwiched is formed between the lower mounting portion 31 and the receiving portion 21. ). Then, the sawtooth-shaped step member 3 having such a configuration is adjusted by a predetermined number and is carried into the installation site. Thereafter, the saw-toothed step members 3 are attached to the receiving member 2 in order from below.

Thus, the lower mounting portion 31 and the upper mounting portion 32 as described above are formed in the sawtooth-shaped step member 3, and the upper mounting portion 32 is provided with a bolt hole.
A notch 31 as shown in FIG.
a, the mounting to the receiving member 2 is performed by using the mounting portions 31 and 32 and the bolt holes and the notches 31.
This is performed as follows using a and the like. First, the lower mounting portion 31 is sandwiched in the gap 5 between the lower upper mounting portion 32 and the receiving portion 21 and, together with the lower upper mounting portion 32, is fixed by a fixing member 6 such as a bolt and a nut. Temporarily fixed to the receiving portion 21. here,
As described above, since the notch 31a is provided in the lower mounting portion 31, even if the fixing member 6 such as a bolt and a nut is provided first, it can be sandwiched. The upper mounting portion 32 is provided with a gap 5 between the upper mounting portion 32 and the receiving portion 21 therefor.
In the state where the lower mounting portion 31 of the upper stage is sandwiched,
Similarly, it is temporarily fixed to the receiving portion 21 by the fixing member 6 such as a bolt and a nut. Thereafter, the bolts and the like are fully tightened, and the fixing operation is completed. In this way, the serrated step member 3 is attached to the receiving member 2.

Since the lower and upper stages do not have the lower or upper stage, the mounting is performed as follows. That is, the lower mounting portion 31 of the lowermost stage
Is directly fixed to the receiving portion 21 by the fixing member 6 such as a bolt and a nut since there is no lower upper mounting portion 32 sandwiching it. Also, the upper mounting portion 3 at the top
2 has no lower mounting portion 31 that is sandwiched between the upper mounting portion 31 and the lower mounting portion 31, so that a spacer (not shown) is inserted into the gap 5 between the lower mounting portion 31 and the receiving portion 21 and the receiving portion 21 is fixed by a fixing member 6 such as a bolt and a nut. It is fixed to the part 21.

In this embodiment, the receiving portion 21 is formed by providing the receiving member 2 with the seat plate 4. However, if the receiving member 2 has sufficient strength, the receiving portion 21 can be provided without providing the seat plate 4. 21 may be formed.

Embodiment 2 FIG. 4 shows a prefabricated staircase according to Embodiment 2 of the present invention.
As in the first embodiment, the assembled staircase 1 includes a pair of receiving members 2 and 2 provided in parallel at a predetermined interval,
A predetermined number of serrated stair members 3 fixed to the receiving member 2
Are the main components.

In the second embodiment, the receiving member 2 is, for example, a lip grooved steel having an opening 2b as an upper surface, and a seat plate 4 straddles the opening of the lip grooved steel at a predetermined interval on the upper surface. The receiving part 21 is formed by being attached. The sawtooth-shaped step member 3 is attached to the receiving portion 21. This attachment will be described with reference to FIGS. 4 and 5 as follows. At the upper end of the sawtooth-shaped step member 3, an upper mounting portion 32 parallel to the receiving portion 21 is formed.
In addition, when the upper mounting portion 32 is placed on the receiving portion 21 at the lower end, the position is adjusted so that a gap 5 is formed between the receiving portion 21 and the lower mounting portion 32 so that the lower mounting portion 32 can be sandwiched therebetween. Thus, a lower mounting portion 31 parallel to the receiving portion 21 is formed (see FIG. 5). Further, as shown in FIG. 5, a part of the lower attachment portion 31 is bent rearward to
3 are formed. The holding width w of the holding portion 33 is set to be large enough to hold the seat plate 4 and the lower upper mounting portion 32. Then, the sawtooth-shaped step member 3 having such a configuration is adjusted by a predetermined number and is carried into the installation site.
Thereafter, the saw-toothed step members 3 are attached to the receiving member 2 in order from below.

Here, since the upper attachment portion 32 and the lower attachment portion 31 are formed on the sawtooth-shaped step member 3 as described above, the attachment to the receiving member 2 is performed as follows. First, the lower upper mounting portion 32 and the receiving portion 21 therefor are sandwiched between the lower mounting portion 31 and the holding portion 33. Next, the upper mounting portion 32 is attached to the receiving portion 21.
Placed on In this state, the upper mounting portion 32 is sandwiched between the lower mounting portion 31 and the holding portion 33 of the upper stage together with the receiving portion 21. In this way, the serrated step member 3 is attached to the receiving member 2.

Since the lower and upper tiers do not have the lower tier or the upper tier, the mounting is performed as follows. That is, the lower mounting portion 31 of the lowermost stage
Since there is no upper mounting portion 32 at the lower stage to sandwich it, a spacer (not shown) is inserted between the lower mounting portion 31 and the receiving portion 21 to fix the lower end. Further, since the uppermost upper mounting portion 31 has no lower mounting portion 31 that sandwiches the upper mounting portion 31, the upper mounting portion 31 is directly fixed to the receiving portion 21 by the fixing member 6 such as a bolt and a nut.

As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to only the embodiments, and various modifications are possible. For example, as shown in FIG. 6, a decorative plate 7 may be arranged on the upper surface of the step board.
As shown in FIG. Further, as shown in FIG. 8, a sheet-shaped finishing member (a carpet, a long vinyl chloride sheet or the like) 9 may be directly attached.

In this embodiment, the number of teeth of the sawtooth-shaped step member is one, but the number of teeth may be two or more.

Furthermore, although the fixing members such as bolts and nuts are not used in the second embodiment, fixing members such as bolts and nuts may be used together.

[0027]

As described in detail above, according to the present invention,
Stairs can be installed in a building without using a crane or the like. Therefore, the installation cost of the building can be reduced. Further, since a crane or the like is not used, there is no need to match the installation time of the stairs with the installation time of the steel frame, and the installation time can be freely adjusted. for that reason,
It will be possible to install at the optimal time.

[Brief description of the drawings]

FIG. 1 is a main part structural diagram of Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view of a saw-toothed step member according to the first embodiment.

FIG. 3 is a diagram illustrating an example of a bolt insertion hole provided in a lower attachment portion.

FIG. 4 is a structural diagram of a main part of a second embodiment of the present invention.

FIG. 5 is an exploded perspective view of the main part with a partial cutaway.

FIG. 6 is a view showing an example of finishing the upper surface of the step board.

FIG. 7 is a view showing another example of finishing the upper surface of the step board.

FIG. 8 is a view showing still another example of finishing the upper surface of the step board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Assembling staircase 2 Receiving member (saraspar) 21 Receiving part 3 Serrated stair member 31 Lower mounting part 31a Notch 32 Upper mounting part 33 Clamping part 4 Seat plate 5 Gap 6 Fixing member (bolt / nut) 7 Decorative plate 8 Mortar finishing 9 Finishing member (carpet) w Nipping width

Claims (2)

(57) [Claims] 1. A receiving member having a predetermined number of receiving portions provided at a predetermined interval, and a predetermined number of sawtooth-shaped step members mounted on the receiving portion after the receiving member is mounted on a building. An upper mounting portion is formed at an upper end portion of the sawtooth-shaped step member, which is overlapped with a receiving portion thereof. At a lower end portion of the sawtooth-shaped step member, a lower upper mounting portion is pressed. A lower mounting portion is formed, and a clamping portion protruding beyond the receiving portion is formed in a part of the lower mounting portion. At least one sawtooth-shaped step member is fixed to the upper mounting portion by the upper mounting portion. The lower mounting portion is fixed to the receiving portion while being sandwiched by the lower mounting portion and the holding portion formed on the upper mounting portion together with the upper mounting portion, and the lower mounting portion connects the receiving portion and the upper mounting portion at the lower level to the receiving portion. Between the holding part A prefabricated staircase characterized by being carried. 2. An upper mounting portion is formed at an upper end portion of the upper mounting portion so as to be overlapped with the receiving portion, and a lower mounting portion pressing the lower upper mounting portion is formed at a lower end portion. A stair-shaped staircase member having an upper mounting portion and a lower mounting portion, wherein the holding portion is formed with a holding portion projecting beyond the receiving portion, the method comprising the steps of: Installing a receiving member having a predetermined number of receiving portions provided at a predetermined position in the building; inserting the lower mounting portion and the lower mounting portion together with the receiving portion into the lower mounting portion and the holding portion; And a step of sandwiching the same with the receiving portion in the lower mounting portion of the upper stage and the holding portion thereof.