JP3114041B2 - Stair construction method and unit stairs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a staircase for constructing a staircase and a staircase, and to a unit staircase used for implementing the method.

[0002]

2. Description of the Related Art Conventionally, when building a staircase and a staircase with a concrete structure (reinforced concrete, steel-framed reinforced concrete, etc.), a mold formed step by step according to the shape of a predetermined step and a mold inside and outside the staircase are used. They built a frame, poured concrete, and built a staircase with the staircase. In addition, at a factory or the like, a steel staircase with steps and necessary landings sandwiched by sasaras is constructed in advance, and this steel staircase is carried to the site and erected, and a staircase building is constructed around the erected steel staircase. The staircase has been constructed by constructing predetermined inner and outer molds and casting concrete.

[0003]

In the above conventional method,
Either method requires processing of the inner formwork when constructing the staircase and removal of the inner formwork after solidification of the concrete, resulting in a problem that the construction is complicated.

[0004]

According to the present invention, however, the above-mentioned problem has been solved because the stairs are constructed by using the unit stairs having the stair members fixed inside the wall of the staircase.

Namely this invention, a predetermined position of the floor of the existing floor, the unit stairs mounted fixed made by installing a stair member 1 Kaibun inside stairway inner wall Tsugikai over the unit staircase When the unit stairs are placed and
An outer formwork is provided outside the staircase interior wall with a predetermined gap.
Place the concrete between the staircase interior wall and the outer formwork
And a staircase wall is constructed, and unit stairs of the next floor are sequentially connected and fixed to construct a staircase and a staircase similarly.

Further, at a predetermined height, the side face of the staircase inside wall for Staircase construction which is open vertically, an opening for entrance provided on the inner surface of the stairwell inner wall, combining the steps and the required landing 1 Kaibun stair member comprising Te consecutively provided a connecting portion to the upper and lower end peripheral portion of the stepped chamber wall is fixed, the
In the through hole formed in the staircase interior wall, outside the staircase interior wall
Separator for mounting outer formwork for staircase wall
This is a unit staircase that is made possible. Furthermore, a support beam for supporting the stair member is erected in the interior wall of the staircase,
Anchors formed at both ends of the receiving beam are attached outside the staircase interior wall.
It is a unit staircase characterized by projecting to the side .

[0007] The above-mentioned stairs member usually has a structure in which one intermediate landing is provided at an intermediate portion of the step, but has a structure in which a plurality of intermediate landings are provided in the intermediate portion of the step, or comprises only the step without the intermediate landing. You can also.

[0008]

Since the connecting portions are provided at the upper and lower peripheral edges of the unit stairs, the unit stairs can be connected and fixed vertically.

The unit stairs having the stair members fixed in the walls of the staircase can be connected and fixed up and down, so that the stairs and the staircase can be constructed simultaneously. In a concrete structure, the wall of the staircase can be used as an inner frame. Further, since the connected unit stairs can be made independent, the stairs can be constructed prior to the construction of the frame.

[0010] If the cane is detachably attached, the opening can be reinforced and, for example, there is no problem in using the unit stairs having a large opening.

[0011]

An embodiment of the present invention will be described with reference to the drawings.

The wall frame plates 1, 2, and 3 are arranged in a plane U-shape along a wall for constructing a staircase of a predetermined height according to a construction place, and are connected to each other to form a wall frame (staircase wall) 5. Is configured. The wall frame 5 has openings 6 and 7 at the top and bottom, and an entrance (an opening for entrance) is provided on one side surface 4 (a surface on which the wall frame plate is not arranged).
8 is open.

Each of the above-mentioned wall frame plates 1, 2, 3 is formed by connecting a plurality of wall frame plate members 61, 61 having the same height and a narrow width as the wall frame plates. Here, the wall frame plate member 61 has a rib 62 for connection reinforcement at a peripheral portion thereof, and the rib is provided with a through hole 63 at a predetermined interval (for example, about 500 mm) in the length direction.
63 is drilled. When connecting the wall frame plate member 61,6 1, the adjacent wall frame plate members 61 and 61 the rib 6
2 and 62 are directed outward and opposed to each other to make the respective through-holes 63 and 63 of the adjacent wall frame plate member 61 communicate with each other. A bolt 64 is inserted through 63 and fastened with a nut (FIG. 9A)
(B)).

The upper edges of the wall frame 5 (wall frame plates 1, 2, 3) are bent outward in the horizontal direction to form connecting portions 9, 9, and the connecting portions 9, 9 have connecting holes 10 at predetermined intervals. And 10 are drilled respectively. Similarly, the lower edge of the wall frame 5 is also bent outward (or L-shaped steel is fixed) to the connecting portion 1 in the horizontal direction.
The connecting portions 11 and 11 are provided with connecting holes 12 and 12 at predetermined intervals, respectively. The connection hole 10
And the connection hole 12 are formed at the same position in the vertical direction. Also, the edges of the wall frame plates 1 and 3 on the side of the entrance 8 are bent vertically (or L-shaped steel is fixed) and the reinforcing edges 1 are formed.
3 and 13 are configured. Further, a reinforcing rod (L-shaped steel) 14 having a horizontal connecting portion 15 is fixed to the upper corners 1a, 3a of the wall frame plates 1, 3 on the entrance 8 side. A reinforcing rod (L-shaped steel) 16 having a horizontal connecting portion 17 at the lower corners 1b and 3b on the entrance 8 side is fixed. Connection holes 18, 18 are formed in the connection portions 15, 17 of the reinforcing rods 14, 16, similarly to the connection portion 11.

An intermediate landing 19 is fixed at a predetermined height on the inner surface of the wall frame plate 2 on the side surface facing the one side surface 4 of the wall frame 5.
In the intermediate landing 19, one edge 20 on the entrance 8 side is not fixed, and the other three edges are fixed to the inner surfaces of the wall frame plates 1, 2, and 3.

A lower step member 24 is formed by connecting and fixing a slab girder 23 to one side edge 22a, 22a of a step 22 formed by connecting predetermined step plates 21, 21 vertically in a stepwise manner. The lower step member 24 is vertically mounted and fixed between one side 20a of one edge 20 of the landing 19 and the reinforcing rod 16, and the other side edges 22b, 22b of the step 22 of the lower step member 24 are fixed to the wall frame. 5
To the inner surface of the wall frame plate 1.

Similarly, one side edge 26a, 26 of a step 26 formed by connecting predetermined step plates 25, 25 vertically in a stepwise manner.
The upper step member 28 is formed by connecting and fixing the sara spar 27 to a. The upper and lower stairs members 28 are vertically installed and fixed between the other side 20b of the one edge 20 of the landing 19 and the reinforcing rod 14,
The other side edge 26b of the step 26 of the upper stair member 28, 26b
Is fixed to the inner surface of the wall frame plate 3 of the wall frame 5.

Further, between the central portion of the reinforcing rod 14 and the wall frame plate 3 side of the reinforcing rod 16, a stick 29 is installed so as to be able to be removed obliquely, and the unit stairs 30 is constructed as described above. (FIG. 7A, FIGS. 2 to 5). In the above,
In the figure, reference numerals 31 and 32 denote handrails, respectively, and the lower end thereof is each
3, 27 fixed. Also, in the drawing, reference numeral 33 denotes a receiving beam for supporting the bottom surface of the intermediate landing 19 and the sasashira 23, 27,
Anchors 33a, 3a connected to both ends of the receiving beam 33, respectively.
3a penetrates the wall frames 1 and 3, respectively, and protrudes outward from the wall frames.

Next, the use of the unit staircase 30 of the present invention based on the above embodiment will be described.

At the position where the stairs are to be constructed on the floor 35 of the existing floor, 1
Unit staircase 3 for the first floor formed according to the floor height of the floor
0 is fixed to the floor 35 (FIG. 1A). On this occasion,
An anchor is driven into the floor 35 from the connection hole 12 of the connection portion 11 or an anchor embedded in the floor 35 in advance is connected to the connection hole 1.
2 and fixed (not shown).

Next, on the unit stairs 30, a unit stair 30a for the second floor, which is formed according to the height of the second floor, is placed. Here, the connecting portions 9, 9, of the unit stairs 30,
15 and the connecting portions 11, 11, 17 of the unit stairs 30a
Are in contact with each other, and the connection holes 10 and 1
2. The connection holes 18 communicate with each other. A bolt 36 is inserted into each of the communicating holes, and nuts 37 are screwed together and fastened and fixed to each other (FIG. 6).
30a are connected to each other (FIG. 1 (b)). In this state,
The unit stairs 30, 30a can be used as work stairs.

Next, an outer formwork 38 for building a staircase, a formwork 39 for building a floor, and other forms are constructed (FIG. 1).
(C)) Pour concrete into the formwork.

At this time, the wall frame 5 forms an inner frame for building a staircase. Also, through holes 63, 63 not used for the inner connection of the through holes of the ribs 62 of the wall frame plate member 61 on the outer surface of the wall frame 5.
The one end 65a of the separator 65 having one end bent.
And the outer mold frame 38 is attached and fixed to the other end 65b of the separator 65 as in the prior art (FIG. 9B).

At this time, the anchor 33a of the receiving beam 33
Is located between the wall frame and the outer formwork. Therefore, anchor 3
When the length 3a is long, the anchor 33a is bent at a predetermined position so as to be located between the wall frame and the outer frame 38 (not shown).

After the concrete is solidified, the outer formwork 38 for constructing the staircase, the formwork 39 for constructing the floor and the other formwork and the bracelets 29, 29 of the unit stairs 30, 30a are removed and the floor of the first floor is removed. Construction of 42, stairs 40, staircase room 41, and other skeletons is completed (FIG. 1 (d)). On this occasion,
The anchor 33a of the receiving beam 33 is embedded and fixed in the wall of the staircase 41. At this time, the wall frame 5 is not removed. In the figure, reference numeral 43 denotes an entrance of the staircase.

Hereinafter, on the unit stairs 30a, the stairs and the stair rooms on each floor are constructed together with the construction of the skeleton while further connecting other unit stairs.

In the above, the wall frame (staircase room wall) of each unit stair has the same planar shape, and the height is formed in accordance with the floor height of each floor. Therefore, if the floor height is different for each floor, the number of the treads 21 and 25 and the shape and size of the intermediate landing 19 are different.

In the above embodiment, the frame is constructed while connecting the unit stairs for two floors. However, three or more unit stairs may be connected at one time.

[0029] Also, in the above embodiment, the wall formwork 5 units stairs 30, sticking or the like finishing plate sheets to the inner surface, in a state which has been subjected to pre-finish painting of the inner surface is carried into a construction site You can also.

In the above embodiment, the brace 29 of the unit stairs 30 is provided to prevent the opening of the unit stairs 30 from being distorted during transportation or casting of concrete, but the wall frame has sufficient strength. If you have one, you can not use it.

In the above-described embodiment, the steps of the unit stairs 30 have the tread plates 25 connected up and down. However, the tread plates 25 are separated one by one without being connected.
27 (not shown).

In the above embodiment, the wall frame 5 is formed in a plane U shape from the wall frame plates 1, 2, and 3, but may be formed in other shapes. For example, as shown in FIG. 7 (b), an entrance 46 is provided on one side surface 45a of a rectangular cylindrical wall frame 45 which is opened vertically, and a floor landing 47 is provided on the lower edge of the wall frame 45 corresponding to the portion. Fix it. The intermediate landing 19, the lower staircase member 24, and the upper staircase member 28 are fixed to the floor landing 47 in the same manner as in the above-described embodiment to form a unit stair 48 (FIG. 7).
(B)).

In the above-described embodiment, the unit landing 30 has the intermediate landing 19 and the upper and lower stair members 24 and 28. However, a stair member not using the intermediate landing may be used. For example, a stair member 52 composed of a first-step step 51 formed by vertically connecting predetermined tread plates 50, 50 is installed and fixed between the parallel wall frame plates 49, 49. The side edges 51a, 51b of the steps are fixed to the inner surfaces of the wall frame plates 49, 49 to form a unit stair 54 having an entrance 53 (FIG. 8A).

Also, doors 5 are provided at both left and right ends of one side surface 55a of a rectangular rectangular wall frame 55 which is opened vertically.
6 and 57 are provided, and a lower floor landing 58 is fixed to a lower edge corresponding to the portion, and an upper floor landing 59 is fixed to an upper edge. The stair members 52 are erected and fixed to the floor landings 58, 59. Both side edges 51 of the step 51 of the stair member 52
A and 51b are fixed to the inner surface of the wall frame 55 to form a unit staircase 60 (FIG. 8B).

[0035]

According to the present invention, a unit stair having a first-floor stair member is placed and fixed inside the staircase wall, and a unit stair for the next floor is placed and fixed on the unit stair. Therefore, when constructing a concrete structure, the construction and removal of the inner formwork of the complicated staircase can be omitted,
There is an effect that the construction work of the stairs and the staircase can be simplified and the construction period can be shortened. Also, anchors at both ends of the beam
If you protrude outside the staircase interior wall,
Can be fixed by burying it in the wall of the staircase. Further, since the stairs can be constructed prior to the construction of the skeleton, the stairs can also be used as work stairs, and there is an effect that the work on site can be made more efficient overall.

[Brief description of the drawings]

FIGS. 1A to 1D are diagrams for explaining a method of constructing a staircase according to the present invention.

FIG. 2 is a longitudinal sectional view of the unit of the present invention.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view of the same.

FIG. 5 is a sectional view taken along line AA in FIG. 2;

FIG. 6 is an enlarged vertical sectional view of a connecting portion of the unit of the present invention.

FIGS. 7A and 7B are perspective views of a unit staircase of the present invention.

8 (a) and 8 (b) are perspective views of another unit staircase of the present invention.

9A is an enlarged vertical sectional view of a wall frame of a unit staircase of the present invention, and FIG. 9B is a sectional view taken along line BB of FIG. 9A.

[Explanation of symbols]

 5 Wall frame (staircase wall) 8 Entrance (opening for entrance) 9, 11 Connection 19 Intermediate landing 22, 26 Steps 23, 27 Sasara girder 24 Lower stairs member 28 Upper stairs member 29 Way stick 30, 30a Unit stairs 35 Floor of existing floor 40 Stairs 41 Staircase room 45, 46, 55 Wall frame (staircase wall) 47, 58, 59 Floor landing 48, 54, 60 Unit stairs 53, 56, 57 Entrance (opening for entrance)

Claims (3)

(57) [Claims] To 1. A predetermined position of the floor of the existing floor, the unit stairs mounted fixed made by installing a stair member 1 Kaibun to <br/> inner stairway inner wall, next to the top of the unit staircase The unit stairs for floors are placed and fixedly connected to each other , and
An outer formwork is arranged outside the wall with a predetermined gap, and the stairs
Casting concrete between the interior wall and the outer formwork and the staircase
A method for constructing a staircase , comprising constructing a wall, and sequentially connecting and fixing unit stairs on the next floor in order to construct a staircase and a staircase similarly. In wherein a predetermined height, the side face of the staircase inside wall for Staircase construction which is open vertically, an opening for entrance provided on the inner surface of the stairwell inner wall, combining the steps and the required landing A staircase member for the first floor, and connecting portions connected to upper and lower peripheral edges of the interior wall of the staircase.
A staircase is formed outside the staircase interior wall through a through hole formed in the inner wall.
It is possible to attach a separator to attach the outer formwork for the wall
Unit stairs characterized by doing. 3. A stair support member for supporting a stair member in an interior wall of a staircase.
Erection, and anchors formed at both ends of the receiving beam are connected to the staircase room.
3. The unit staircase according to claim 2, wherein the unit staircase protrudes outside the inner wall .