JPH07269054A - Staircase around pca treadboard and construction method therefor - Google Patents

Abstract

PURPOSE:To make it possible to set PCa treadboards to a core post accurately, and what is more, promptly. CONSTITUTION:A PCa treadboard comprises a treadboard part 2a and a ring- shaped base part 2b. A non-slip 2c is mounted to one side of the treadboard 2a while a fixing insert 2d is buried on the tip face where the fixing insert is designed to fix the lower end of a hand rail part 3a of a hand rail 3. The ring-shaped base part 2b is outwardly inserted into a core post which is vertically and fixedly installed at the location of a staircase of a building where positioning inserts 2e and 2f are buried in the top and the bottom respectively so that they may be laid out in such a state deviated from each other at an angle, say, 15 deg. respectively. The core post is vertically installed and fixed on a floor located at the position of the staircase of the building.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PCa (precast concrete) board staircase and its construction method.

[0002]

2. Description of the Related Art A conventional PCa board staircase is shown in FIG.
As shown in FIG. 1, a core pillar 10 standing on the floor surface at the stairs of the building, and a plurality of PCa treads 20 installed so that an annular base is fitted to the core pillar 10 and shifted from each other by a predetermined angle. When,
Some consisted of

However, in the above-mentioned conventional PCa board staircase, the PCa tread board 20 is attached at different angles for each step, so that the positioning work is troublesome and it is difficult to add the core post 10. However, there was a problem that it was not suitable for buildings with floors.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art. The object of the present invention is to set a PCa tread plate on a core column accurately and quickly. Providing stairs around the PCa board.

[0005]

The PCa board staircase of the present invention comprises a core pillar standing on the floor surface of a staircase of a building, and an annular base portion fitted to the core pillar, thereby forming a predetermined angle with each other. In a PCa board staircase consisting of a plurality of PCa treads that are installed staggered by one, positioning inserts are provided on the upper surface and the lower surface of the annular base of the PCa treads, respectively, and these positioning inserts are mutually It is characterized in that it is offset by a predetermined angle.

Further, according to the construction method of the PCa board stairs of the present invention, the core pillars standing on the floor surface at the stairs of the building and the annular bases fitted to the core pillars are mutually separated by a predetermined angle. In a construction method of a PCa board staircase consisting of a plurality of PCa treads installed in a staggered manner, the annular base of the PCa tread is sequentially dropped from the upper end of a core column standing on the floor surface, On the positioning pin attached to the positioning insert installed on the upper surface of the annular base of the PCa tread, the upper PC
It is characterized in that the alignment inserts installed on the lower surface of the annular base of the a-step plate are aligned and fitted, and these PCa-step plates are set at a predetermined angle offset from each other.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a core column,
As shown in FIG. 2, it is composed of a cylindrical steel frame (for example, a general structural steel pipe). The core column 1 is erected and fixed on the floor F at the stairs of the building. A lifting member 1a is attached to the top of the core column 1.

Reference numeral 2 is a PCa tread integrally molded of concrete, and as shown in FIG. 3, mainly comprises a tread 2a and an annular base 2b. A non-slip 2c is attached to one side edge of the tread portion 2a, and a fixing insert 2d is embedded in the tip end surface. As shown in FIG. 1, the lower end of the handrail 3a of the handrail 3 is fastened and fixed to the fixing insert 2d by a bolt (not shown).

Positioning inserts 2e and 2f are embedded in the upper surface and the lower surface of the annular base 2b, respectively. In this embodiment, a positioning (not shown) is detachably attached to the positioning insert 2e embedded in the upper surface of the annular base 2b, and the positioning embedded in the lower surface of the upper PCa tread 2 is adjusted. Although it is adapted to be inserted into the insert 2f, it may be reversed. The positioning inserts 2e and 2f are arranged so as to be offset from each other by a predetermined angle (for example, 15 °).

Next, the construction method of the stairs around the PCa plate will be described mainly with reference to FIG. First,
As shown in FIG. 4 (A), the base portion of the core column 1 is fixed to the anchor bolt B provided at the stairs position of the floor F of the building, and is fixed by the root wrapping concrete C.

Then, as shown in FIG. 5, the PCa tread 2 is lifted up, and the annular base portion 2b thereof is externally inserted from the upper end portion of the core column 1 so that the PCa on the lower side which has already been set.
Drop it on the tread 2 '.

As shown in FIG. 6, a positioning pin 2e 'is provided on the positioning insert 2e of the lower PCa tread 2'.
Is attached, the positioning pin 2e 'and the insert 2f for aligning the depressed PCa tread 2
When the positions are matched and fitted, the PCa tread 2 is set at a predetermined deviation angle (15 ° in this embodiment) with respect to the lower PCa tread 2 '.

The above work is repeated to assemble the PCa tread 2 as shown in FIG. 4 (B). When the assembling of the PCa tread 2 is completed, as shown in FIG. 4 (C), the upper end portion of the core column 1 and the building are connected and fixed by the steel frame 4, and the landing E is formed as shown in FIG. 4 (D). To construct. On the top of the core column 1, a core column 1'of a higher floor is built and the above work is repeated.

[0014]

EFFECTS OF THE INVENTION Positioning inserts for the PCa treads can be easily performed by providing positioning inserts on the upper and lower surfaces of the annular base of the PCa treads and shifting the positions of these inserts by a predetermined angle.

[Brief description of drawings]

FIG. 1 is a diagram showing a construction example of a stair around PCa of the present invention.

FIG. 2 is a standing view of a core column made of a cylindrical steel frame.

FIG. 3 is a plan view (A), a partially cutaway side view (B), an end view (C), and a sectional view (D) of a positioning insert portion of a PCa tread plate.

FIG. 4 is a construction diagram for sequentially explaining the construction of stairs around PCa.

FIG. 5 is an explanatory view of a work of mounting a PCa tread plate.

FIG. 6 is an explanatory view of assembling a PCa tread plate.

FIG. 7 is a perspective view of a conventional PCa staircase.

[Explanation of symbols]

 1 core pillar 1'core pillar 1a hanging member 2 PCa tread plate 2'PCa tread plate 2a tread plate part 2b annular base 2c non-slip 2d fixing insert 2e positioning insert 2e 'positioning pin 2f positioning insert 3 handrail 3a handrail 4 Steel frame B Anchor bolt C Nemaki concrete F Floor E Landing

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Tadakazu Ito 339 Washizawa-machi, Hamamatsu City, Shizuoka Prefecture (72) Inventor Naoyuki Nishimura 3244 Kawajiri, Shiroyama-cho, Tsukui-gun, Kanagawa Prefecture

Claims (2)

[Claims] 1. A core pillar, which is erected on a floor surface of a staircase position of a building, and a plurality of PCa treads which are fitted to the core pillar and are displaced from each other by a predetermined angle. Become a PC
In the stairs around the a plate, positioning inserts are provided on the upper surface and the lower surface of the annular base of the PCa tread, respectively.
A PCa board staircase characterized in that these positioning inserts are offset from each other by a predetermined angle. 2. A core pillar that is erected on a floor surface of a staircase of a building, and a plurality of PCa treads that are installed so that an annular base portion is fitted to the core pillar and shifted from each other by a predetermined angle. Become a PC
In the construction method of a stairs around a board, the annular base portion of the PCa tread plate is sequentially dropped from the upper end portion of the core column erected on the floor surface and installed on the upper surface portion of the annular base portion of the lower PCa tread plate. Positioning inserts installed on the lower surface of the annular base of the upper PCa tread are aligned and fitted to the positioning pins attached to the positioning inserts.
A construction method for a PCa board staircase, characterized in that the Ca footboards are set at mutually offset angles.