JP3434702B2 - Concrete staircase construction method and staircase components - 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 of constructing a stairway which is a part of a reinforced concrete building and a stairway component used for the construction.

[0002]

2. Description of the Related Art Generally, the conventional construction method of stairs made of concrete is to raise a staircase wall form, to assemble a staircase slab formwork, stair bar reinforcement, formwork installation at each stage, concrete placement, formwork demolding, Stairs are printed out, stair nosing is set up, plastering under a plasterer, curing, mortar finishing, and curing are performed in this order. The construction period is about 7 to 10 days, although it depends on the scale of the structure.

[0003]

In the construction of a building, it is desirable that not only the entire construction period but also the construction period of each part is as short as possible. In particular, the stairway structure makes it impossible to pass through that part during construction, which hinders the progress of other construction. Therefore, it is strongly required to shorten the construction period on site as much as possible. In addition, since the removed formwork cannot be diverted and will be incinerated, if the formwork used for stair construction can be reduced even a little, part of the formwork removal work can be omitted and the construction period can be shortened. Not only can they contribute, but they can be useful for resource conservation.

Based on this point of view, the object of the present invention is to mass-produce the components for one step of stairs in advance in the factory, and to connect a large number of these components on site so that the main parts of the conventional formwork can be connected. It is to provide a concrete staircase construction method and a staircase construction element which are useful for shortening the construction period and protecting resources by forming them so as to fulfill their functions.

[0005]

In order to solve the above-mentioned problems, the concrete staircase construction method of the present invention is a stepping plate (11a, 11b, etc.) for one step and a riser plate (12a, 1a).
2b) are integrally formed with the stepping plate (11a,
11b) and a part of the stairs component (10a,
10b) is used to arrange the stair reinforcement (4) in the space between the left and right staircase wall formwork (1 etc.) and the staircase bottom formwork (2), and the stairway component (10a, 10b) A plurality of the above) are arranged on the reinforcing bar (4) to form the upper surface of the stair structure, and the concrete injection hole (15a,
15b) and the like, and concrete is poured into the stairs constituent elements (10a, 10b, etc.) and fixed.

In order to solve the above-mentioned problems, the concrete stairway constituent element of the present invention is a constituent element for one step of the concrete staircase, and notches (13a, 13b, etc.) for pouring concrete into a part of the staircase when the staircase is constructed. A horizontal step board (11a, 11b, etc.) and a substantially vertical riser (12a, 12b, etc.) following the step board (11a, 11b, etc.) are integrally formed, and the constituent elements (10a and 10a) (10b, etc.) and means (6, 16a, 16b, etc.) for restricting the relative position at the time of coupling.

More specifically, the step board (11a,
11b, etc.), a U-shaped notch (13a, 1a) for forming a hole (15a, 15b, etc.) into which concrete is poured at the time of stair construction at the center of the end on the side of the adjacent upper component.
3b), which is connected to the lower end of the riser (12a, 12b, etc.) adjacent to the lower stairs component and is parallel to the step board (11a, 11b, etc.).
a, 14b, etc.) are provided.

The material may include cement, glass wool, and silica sand, and may be formed of glass wool registration concrete in which the material and water are mixed and kneaded.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view (perspective view) showing a concrete staircase constituent element (hereinafter referred to as staircase constituent element) of the present invention, a connecting method thereof, and a fixing method to a staircase wall formwork. As shown in FIG. 1, the concrete stairway component 10a (or 10b) of the present invention includes a step plate 11a (or 11b) and a riser plate 12 for one step.
It is formed integrally with a (or 12b). The staircase components 10a, 10b, etc., in the present embodiment,
Generally, GRC (glass fiber reinf) is made by mixing cement, glass wool, silica sand and water and kneading them.
It is made of a material called "accorded concrete".

A horizontal step board 11a (or 11
A part of b) is provided with a U-shaped notch 13a (or 13b). Almost vertical riser 12a
At the lower end of (or 12b), the lower staircase constituent element (for example, the staircase constituent element 10b with respect to the staircase constituent element 10a)
A lower connecting portion 14a (or 14b) for connecting to the stepping plate 11b (or 11c (not shown)) is provided. Lower connection part 14a (or 14b)
Is parallel to the stepping plate 11a (or 11b).

When the staircase constituents are connected to each other, the lower connecting part of the upper staircase constituent and the stepping plate of the lower staircase constituent (for example, the lower connecting part 14 of the staircase constituent 10a).
a and the step board 11b) of the lower staircase component 10b are configured to be flush with each other. In addition, a notch is provided between the lower connecting portion of the upper staircase constituent element and the step board of the lower staircase constituent element (for example, between the lower step connecting portion 14a of the staircase constituent element 10a and the stepping board 11b of the lower staircase constituent element 10b). Holes are formed by 13a (or 13b) and the like, and the holes become holes (hereinafter referred to as injection holes) 15a, 15b for injecting concrete when constructing stairs.

The connecting fittings 6, 6 are composed of an upper staircase constituent element (for example, 10a) and a lower staircase constituent element (for example, 10a).
b) is to be connected at two places on the left and right, and when connecting these stairway constituent elements, the holes 6a and 6b provided in the connecting fitting 6 are connected to the lower connecting portion 14a of the upper staircase constituent element. The holes 16a provided and the holes 16b provided in the stepping plate 11b of the lower staircase component are engaged and fixed by bolts not shown. In addition, 18, 18, 18, 18 are lower connection parts 14a, 1
4b and the like, which are projections for overlapping with the lower stepping plate 11b and the like. Further, 19 and 19 are non-slip grooves on the stepping surface.

The left and right sides of each staircase component 10a, 10b are
Fixing bracket 7 for fixing to a staircase wall form not shown,
7, 7 and 7 are provided with holes 7a and 7b on the vertical surface and holes 7c on the horizontal surface, respectively. When fixing each staircase component to the staircase wall form, the holes 7a and 7b are used for the staircase wall form, and the hole 7c is used for the step board 11 of each staircase component.
The holes 17c provided in a, 11b, etc. are engaged and fixed by bolts (not shown).

The construction of the staircase using the staircase constituent elements of the embodiment shown in FIG. 1 is generally carried out after the staircase wall formwork, the staircase slab formwork assembly, and the stair bar reinforcement are finished by the conventional technique. Arrangement of the required number of steps of the staircase components of the embodiment example, return of staircase wall form, fixing of each staircase component by connecting metal fittings 6, 6 ... 6 and fixing metal fittings 7, 7 ... 7, staircase wall formwork Install in the order of tightening.

FIG. 2 is a perspective view showing the reinforcing bar arrangement of the staircase when the concrete staircase construction method of the present invention is used. In FIG. 2, 1 is a staircase wall formwork, 2 is a staircase lower surface formwork, 3 is a landing bottom surface formwork, 4 is a staircase reinforcing bar, and 5 is a landing bar reinforcing bar. FIG. 3 is an explanatory view (perspective view) showing a state in which a connecting body of the staircase constituent elements of the present invention is arranged on the staircase reinforcing bar of FIG. 2 to form the upper surface of the staircase formwork. However, of the staircase molds of FIGS. 2 and 3, the front mold is omitted.
Also, the stairway components of FIG. 3 show only the three steps that follow the landing above the stairs. In practice, it is only necessary to connect the required number of steps of the staircase components.

After the above-mentioned construction, the concrete is poured and poured from the pouring holes 15c, 15b, 15a, etc. of each stairway constituent element from the lowermost stage to the upper stage in order.
5a, 15b, 15c, etc. can be simply pushed up on the upper surface of the concrete at the same time, and following the concrete placing as in the conventional method, mold removal, stair marking, stair nosing, plastering, plastering, curing It does not require troublesome mold release work such as mortar finishing.

Therefore, the number of steps is small as compared with the conventional mounting and processing of the formwork, and the number of steps is small, so that the on-site processing time for one stair can be reduced by about 20 minutes. Conventionally, due to the construction of stairs, about 7 to 10 days have been impassable in the past, but according to the method for constructing concrete stairs of the present invention, it is possible to walk through on the day following the placing of concrete.

[0018]

As described above, according to the method of constructing a concrete staircase according to the present invention, a staircase plate and a riser plate for one step are integrally formed, and a part of the stepboard plate is cut out to form a concrete injection hole. By arranging the components for the required number of steps to form the upper surface of the staircase structure, and by pouring concrete poured into the pouring hole, the formwork attachment and detachment of the stair step-in surface and riser surface can be done as in the conventional method. There is an effect that the stairs are finished at the same time as the concrete is placed without requiring troublesome work.

Further, the concrete stairway constituent element according to the present invention integrally comprises a stepping plate for one step having a notch hole for pouring concrete at the time of staircase construction and a stepping plate for one step following the stepping plate. Since it is a staircase constituent element formed in the above, it is suitable for performing the above construction, and the staircase used in this embodiment has a feature that there is no risk of exfoliation of mortar or the like and that it is of high quality.

More specifically, the lower end of the riser is provided with a lower connecting portion which is connectable to the adjacent lower stairs constituent element and is parallel to the stepping plate, and is connected to the lower connecting portion of the adjacent upper staircase constituent element. By providing a U-shaped cutout hole at the center of the end of the power stepping plate for pouring concrete when constructing stairs, the connection between the upper and lower stair components can be made easy and reliable, and at the time of concrete placement. It has the effect of facilitating the injection of concrete.

Further, GRC (glass fiber reinfo) is used in which the material for the staircase component contains cement, glass wool and silica sand, and the material and water are mixed and kneaded.
It is possible to keep the strength of the staircase component sufficiently large and to cope with staircase configurations of many kinds of shapes and sizes by adopting the “rced concrete”.

[Brief description of drawings]

FIG. 1 is an explanatory view (perspective view) showing a stairway constituent element of the present invention and a fixing method thereof.

FIG. 2 is a perspective view showing a state of stair bar reinforcement during construction by the method of the present invention.

FIG. 3 is an explanatory view (perspective view) showing a state in which a part of a connecting body of stairway constituent elements is arranged on the staircase reinforcing bar of FIG. 2;

[Explanation of symbols]

1 staircase wall formwork 2 Stairs bottom formwork 3 landform bottom formwork 4 stairs reinforcement 5 Landing bar 6 connection fittings 7 Fixing bracket 10a, 10b, 10c staircase components 11a, 11b, 11c stepping plate 12a, 12b, 12c kick plate 13a, 13b, 13c Notches 14a, 14b, 14c Lower connection part 15a, 15b, 15c Concrete injection port

Claims (4)

(57) [Claims] 1. A step board, a nearly vertical rise plate following the step board, and a lower stair structure at the lower end of the rise plate.
The possible the depression lower connecting portion parallel to the plate connected to the stepping plate formed elements a concrete stairs construction method using the staircase component integrally molded concrete, depression corresponding to the lower connecting portions of the upper stairway components Board
Concrete injection with a cutout in the center of the side
Prepare a staircase component with holes, arrange stair bar reinforcement in the space between the left and right staircase wall formwork and the staircase bottom formwork, and connect the lower-stage connecting part of the stairway component and the lower-stage stairway component.
It is characterized in that the stepping plates are combined so as to be flush with each other and are arranged on the rebar to form the upper surface of the staircase structure, and concrete poured into from the concrete pouring hole is poured to fix the staircase constituent elements. How to construct concrete stairs. 2. A concrete stairway components used in the concrete stairs construction method according to claim 1, wherein the concrete injection hole of said depression plate, with cutouts shaped shaped arc provided along the upper edge A concrete staircase component. 3. The concrete stairway constituent element used in the concrete staircase construction method according to claim 1, wherein the lower stage connecting portion is further overlapped with a lower stepboard.
A concrete stair component with a pair of protrusions for 4. The material according to claim 2, wherein the material contains cement, glass wool, and silica sand, and is formed of glass wool registration concrete in which the material and water are mixed and kneaded. The listed concrete staircase components.