JPS5851104B2 - Stair construction method and support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of constructing a staircase and a support device for installing a ready-made staircase into a concrete building.

Conventionally, most of the stairs in concrete buildings are constructed using concrete cast on site, so constructing the formwork for the treads not only requires special techniques, but also requires highly accurate construction by skilled engineers. It was difficult to obtain the finished product, and once the concrete had hardened, it could not be used as a passageway, creating a bottleneck in shortening the construction period.

However, according to this invention, ready-made stairs can be temporarily installed between the floor and the landing, and between the landing and the floor, and can be constructed sequentially to the upper floors after the floors, etc. are constructed. First, it is possible to start using it in a short period of time after construction, and the stairs themselves can be manufactured in factories with high precision and mass production, and temporary construction can be performed on site without relying on special engineers, all of the problems of the conventional method have been improved. That's what I did.

That is, to explain this invention with reference to an embodiment, two pillars 2 and 3 are vertically installed on the first floor 1 at a predetermined interval,
A bracket 5 is fitted and fixed to the column 2 at the same height as the landing 4, and a bracket 7 is fitted and fixed to the column 3 at the same height as the second floor 6.

Since the brackets 5 and 7 have the same structure, the bracket 5 will be explained below. The bracket 5 consists of a tightening bolt 8, a member 9 for fitting onto the support, and a cover member 10 for contacting the support. Horizontal collar 1 installed at the lower end of
1, and the adjusting bolt 12 is screwed onto the support column 2.
The height can be finely adjusted by coming into contact with a support plate 13 fixed to the top.

The support plate 13 has a support plate 14 at the upper part of one side, and a locking rod 15 is passed through the side plate 16 and the locking hole 17 of the support column 2 on the other side and fixed thereto.

Support rods 18 and 19 are horizontally fixed to the upper portions of the brackets 5 and 7 with bolts 26.

Therefore, ready-made stairs 20, 21 are attached to the support rods 18, 19.
The upper end of the staircase 20 is suspended, the lower end of the staircase 20 is fixed on the floor 1, and the lower end of the staircase 21 is supported and fixed on the support rod 18.

In addition, anchor reinforcing bars 22 and 23 are provided at the upper end of the staircase 20 and the upper and lower ends of the staircase 21 to protrude horizontally toward the landing 4 or the second floor 6. ) in concrete 24.25.

Conch like this! J-) When 24.25 has hardened to a certain degree, the construction of the stairs to the second floor will be completed, and each floor and staircase will be constructed at the same time, and the next step will be to move to the upper floors, but before the floor formwork is removed. Since it is possible to use already constructed stairs, it is extremely convenient for construction work, and the construction period can also be shortened.

In addition, since a lifting amount fine adjustment device is attached to the bracket attached to the column of the present invention, the accuracy when constructing the stairs can be further improved.

Various structures are possible for fixing the support rods 18 and 19 to the brackets 5 and 7, but in this embodiment, an L-shaped step 27 is provided at the top of the lid member 10 of the bracket, and the support rods 18 and 19 are provided on this step 27. The rods 18 and 19 are placed and fixed with bolts 26.

Since the pillars 2 and 3 can be removed after the staircase is constructed,
Of course, it can be reused as construction equipment, and when it is removed, it can be efficiently disassembled into a small volume because each part is assembled and fixed with bolts.

Next, to adjust the support height of the upper end of the stairs, fit the support plate 13 at a predetermined height on the column, and connect the side plate 16 and the latching hole 17.
The support plate 13 is fixed by passing through the hooking rod 15.

Next, after loosening the tightening bolts 8 of the brackets 5 and 7,
Rotate the adjustment bolt 12 so that its lower end touches the support plate 14 of the support plate 13, and while checking the height of the support rods 18 and 19 supported by the brackets 5 and 7, tighten the adjustment bolt 12. When rotated, the bracket moves up and down relative to the upper surface of the support plate 14 as shown by arrow 28 in FIG. 4, depending on the direction and amount of rotation of the adjustment bolt 120.

Once the upper end of the staircase has been correctly supported at the design height in this manner, the tightening bolt 8 is tightened to fix the bracket to the support column.

In other words, the approximate height of the brackets 5 and 70 is the support plate 1.
Since the height is determined by the height of step 3 and the minute height that falls within the interval between the locking holes is adjusted using the adjustment bolt, it is possible to construct the stairs with extremely high precision.

The stairs 20 and 21 in the construction example have a spiral girder 29,
Although treads 31 and 32 are fixed in sequence to 30, and treads made of high-strength concrete are used, there are no problems with the material and shape of the girders and treads, or the shape and structure of the staircase itself.
, it goes without saying that the method of this invention can be implemented.

Further, the support columns are not limited to the material structure shown in the construction example, but any material that can be firmly and reliably supported during the temporary erection of the stairs and can be assembled and dismantled can be used in the same manner.

Next, the pillars 2 and 3 are made of standard materials having a predetermined length, and are connected to each other as necessary. An example of this will be explained with reference to FIG. 7.

That is, at the upper end of the lower support 2, there is a U-shaped joint 33.
At the same time as fitting the lower halves of a to face each other,
Insert the lower end of a, pass through the bolts 34 and 34a, and tighten and secure.

In this case, the joints 33, 34a are inserted into the locking holes 17°17a of the columns 2, 2a, respectively.
Bolt holes 35, 35a are drilled in 3a, and a stopper 36.36 is provided at the center inside the joint 33.33a.
A is installed horizontally.

Therefore, the respective ends of the upper and lower supports are opposed to each other with the stopper in between.

Next, FIGS. 9 and 10 show other mounting structures for the cross beam 37 and the footboard 38.

That is, a one-shaped bracket 39.39a was tightened and fixed to the inner lower part of the spiral girder 37.37a using stud bolts 40, 40a, and a nut 41 embedded in the lower surface of the footboard 38 was passed through the bracket 39.39a. A mounting bolt 42 is screwed together.

With this structure, the treads can be removed one by one by unscrewing the mounting bolts 42, and it is also possible to work on the outside of the stringer or to put your hand between the stringer and the wall. Since there is no need to insert the tread, it is easy to install the tread even in extremely narrow spaces, and
It is also possible to replace any tread.

In the above embodiment, a case was explained in which stairs were constructed between the lower floor and the landing, and between the landing and the upper floor. Similar construction methods can also be used in cases where

That is, according to the present invention, supports are planted at predetermined intervals at a staircase construction site, existing stairs are temporarily constructed on these supports, and the stairs and the floor or landing are integrally constructed and completed. High-precision stairs can be efficiently constructed by ordinary workers without the need for advanced technology for formwork installation and concrete pouring associated with on-site construction. Since stairs can be used as needed, the construction period can be significantly shortened.

In addition, because stairs can be mass-produced in factories, they have the advantage of being able to easily supply the desired dimensions, precision, and structure at a relatively low cost. It also has the effect of significantly easing restrictions on schedules.

Furthermore, the support device is easy to disassemble and reassemble, and the support height can be finely adjusted, making it easier to improve work efficiency and construction accuracy, and by removing it after construction, it can be used any number of times.

[Brief explanation of the drawing]

Fig. 1 is a partial front view of a staircase constructed according to the present invention at an intermediate stage, Fig. 2 is a partial side view, Fig. 3 is a partial plan view, and Fig. 4 is a partial front view of the staircase constructed according to the present invention. FIG. 5 is a front view, FIG. 6 is a partially cutaway plan view, FIG. 7 is an enlarged partial cross-sectional view of the strut connection, and FIG. 8 is a partially enlarged front view of the joint. FIG. 9 is an enlarged partially sectional front view showing the fixed state of the treadle and the step board, and FIG. 10 is an enlarged partially sectional side view. 1... Floor, 2, 3... Support, 4... Landing, 5
, 7...Bracket, 8...Tightening bolt, 9...
Fitting member, 10... Lid member, 11... Horizontal collar, 12
... Adjustment bolt, 13... Support plate, 14... Support plate, 15... Latching rod, 16... Side plate, 17... Latching hole, 18.19... Support rod , 20.21... Stairs, 22.23... Eicher reinforcing bars, 24.25... Concrete, 27... Steps, 26... Bolts, 28
...Arrow, 29, 30...Saa-ra digit, 31, 32
...Treadboard, 33.33a...Joint, 34°34a.
...Bolt, 35.35a...Bolt hole, 36°36
a...Stopper, 37.37a...S stringer, 3
8...Treadboard, 39.39a...1-shaped bracket, 4
0.40a...Built bolt, 41...Nut, 42
···Mounting bolts.

Claims (1)

[Scope of Claims] 1. Two pillars are vertically installed at a predetermined interval on the first floor where the stairs are to be installed, and the stairs are temporarily installed on the pillars at a landing position between the first floor and the second floor. At the same time, a support rod for temporary stairs is provided at almost the same height as the second floor, and a support rod for the temporary stairway is provided at almost the same height as the second floor, and between the support rod at the landing position and the support rod at the landing position, After temporarily constructing prefabricated stairs at an angle between the stairs, concrete is poured on the landing and the second floor to integrally connect the stairs, the landing and the second floor, and the above operation is repeated until the required floor is reached. A method of constructing a staircase, which comprises constructing a staircase, and then removing a support post or other staircase support. 2. The method of constructing a staircase according to claim 1, wherein the ready-made staircase is constructed by assembling the coroner girder and the tread. 3. The method for constructing stairs according to claim 1, characterized in that the anchor reinforcing bars fixed to the ends of the stairs are buried in concrete of a landing or floor, and the concrete is hardened. 4. A support plate fixed to the pillars by drilling a large number of hanging holes vertically in parallel on two pillars each having a fixing part to the floor at the lower end, and attaching a bracket to the pillars so as to be adjustable up and down; 1. A support device for constructing stairs, characterized in that an adjusting bolt screwed into the bracket constitutes a device for finely adjusting the amount of elevation of the bracket, and a support rod for temporary staircase construction is horizontally fixed to the bracket.