JPH10311136A - Temporary stair and its assembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ease the slope gradient of a stair by forming with upper and lower stair landings having large depth and width arranged to open strings, and by restricting the interval between the stair landing board and tread board of each stair unit to smaller than the height of landing board below the stair unit. SOLUTION: A stair framing unit is built with erection frames 11, braces 13 and horizontal members 14, each being arranged as a member of a pair of components oppositely located; in an upper and lower floor frame unit, a joint fitting 16 is inserted to the upper end of a pole 15 of an erection frame 11 for a lower story in the upper and lower floor frame unit. Next, the lower end of the pole 15 of the upper floor erection frame 11 is inserted to the upper portion of the joint fitting 16 and the assembling is sequentially performed. In this case, for the erection frame 11, a beam member 12 is installed at an interval equal to one tread 2, and a latch fittings 5 at the tip of the upper landing board 4 of the stair unit is hooked to the beam member. On the other hand, a latch fittings 5 at the tip of the lower landing board 4 is hooked to a beam member 17 at the upper end of the erection frame 11 in the lower layer story. By doing this, the location of the upper landing board 4 of the unit is made lower than the landing board 4 of an upper unit by one tread board, which provides a gentler slope gradient and safe lifting and descending for the workers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary staircase installed on a construction site and a method for assembling the same.

[0002]

2. Description of the Related Art Each staircase unit of a temporary staircase installed on a construction site has a staircase composed of at least four pillar members erected at four corners of a square and a horizontal beam member connecting the pillar members. It is installed by bridging the beam members at different heights on the two opposing surfaces of the frame.

Conventionally, as such a staircase unit, there is a staircase unit in which a landing plate having a depth greater than a tread plate is provided at the upper and lower ends so as to project horizontally in opposite directions to each other (Japanese Utility Model Laid-Open No. 50558/1984). No., JP-A-8-199
796).

[0004] Such a staircase has an advantage in that the landing plate is integrally provided at the upper and lower ends, so that it is not necessary to separately pass a scaffold plate for the landing on the stair frame.

[0005]

However, in this type of staircase unit, there is no landing plate at the upper and lower ends, since a landing plate having a greater depth than the tread plate of each step horizontally projects in the opposite direction. There is a problem that the installation gradient becomes steeper by the horizontal overhang of the landing board than in the case of installing a general stair including only a tread.

[0006] Further, in order to reduce the installation gradient of the stair unit having the landing plate at the upper and lower ends, the distance between the front and rear of the stair frame must be increased by the increase in the width of the landing plate. The installation area must be large.

[0007] Therefore, the present invention is to make it possible to install a stair unit having a landing plate at the upper and lower ends at a gentler angle without widening the space before and after the stair frame.

[0008]

In order to solve the above-mentioned problems, the present invention comprises at least four pillar members erected at four corners of a square and a horizontal beam member connecting the pillar members. In a temporary staircase composed of a staircase frame and a plurality of staircase units that are wrapped in a folded state on beam members having different height positions of two opposite surfaces of the frame, the staircase unit is inclined by a pair of left and right sides. It is formed of a sasara girder, and a plurality of steps and upper and lower dance plates having a greater depth than the treads attached to the sasara girder. It was stipulated that the height of the landing plate below the stair unit to be installed would be lower by the height of one step of the tread.

As described above, if the position of the landing plate above each stair unit is made lower by one step than the landing plate below the stair unit one step above, the inclination of the stairs becomes less. Also, the transition to the next floor stairs is only one step, so there is no hindrance to going up and down.

[0010]

1 and 2 show a first embodiment of a staircase unit according to the present invention.

This staircase unit has a pair of left and right sloping girders 1, a plurality of steps 2, and a landing formed up and down with the width of the steps 2 above and below the plurality of steps 2. Plates 3 and 4 are attached. Further, the width of the stair unit is not more than half of the effective inner width of the stair frame.

The upper and lower ends of the slab 1 are horizontally bent in opposite directions to each other.
Is attached, and at its tip, a building frame 1 that constitutes a staircase frame
A hook 5 to be hooked to one horizontal beam member 12 is attached. The form of the latch 5 is not limited to the illustrated one, and may be a single tube coupler as long as it can be attached to the beam member 12.

Upper and lower landing boards 3, 4 and a plurality of steps 2
As shown in FIG. 2, when the stair unit is assembled, the landing plate 4 above the stair unit located in the lower layer is, as shown in FIG. It is specified to be low. That is, when installed on the stair frame, a step corresponding to one step of the tread plate 2 is formed between the landing plate 4 located above the lower stair unit and the landing plate 3 located below the upper stair unit. It is supposed to be.

In the staircase unit shown in FIG. 1, a latch 5 is provided at the same height as the upper and lower landing plates 3, 4.

The above-mentioned staircase frame is constituted by one frame unit for one floor.

The frame unit is formed by a pair of building frames 11 facing each other, braces 13 and horizontal members 14 connecting the pair of building frames 11, but the horizontal members 14 are not always necessary. Then, the frame units on the upper and lower floors insert the joint fitting 16 into the upper end of the support 15 of the lower frame 11 and insert the lower end of the support 15 of the upper frame 11 into the upper part of the joint 16. It is assembled in order by inserting.

The building frame 11 has a horizontal beam member 1 at the upper end.
Below the step 7, the horizontal beam member 12 is installed at an interval of one step of the tread plate 2, and the hook 5 at the tip of the landing plate 4 above the stair unit is hooked on the horizontal beam member 12. It has become. On the other hand, the hook 5 at the tip of the lower landing plate 4 is hooked on a horizontal beam member 17 at the upper end of the lower-floor building frame 11.

Next, FIGS. 3 and 4 show a second embodiment of the staircase unit according to the present invention.

Similarly to the staircase of the first embodiment, the staircase of the second embodiment also includes a pair of left and right slabs 1, a plurality of treadboards 2, and an up and down sandwich of the plurality of treadboards 2. ,
Landing boards 3 and 4 having a width about twice as large as the step board 2 are attached, and as shown in FIG. 4, the position of the landing board 4 above each stair unit is mounted in a stair frame. The landing plate 3 below the upper staircase unit is lowered by one step of the tread plate 2.

In the staircase of the second embodiment, the upper part of the girder 1 protrudes above the landing plate 4 and is bent horizontally at the upper end of the one-story staircase. Is provided so that the hook 5 is hooked on the beam 17 at the upper end of the building frame 11. Therefore, in the case of this second form of stairs, the beam member 1
7 as well as the stairs of the first embodiment, and further below the beam member 17 at the upper end of the building frame 11,
There is no need to separately provide a beam member 12 for hooking the.

Further, a reinforcing stay 6 is mounted between the upper end of the above-mentioned girder 1 and the landing plate 4.

Next, in the temporary staircase according to the present invention, as shown in FIG. 5, after assembling the lower frame unit, the scaffold plate A is attached to the beam member at the same height above the lower frame unit. On the scaffold A, the frame units of the next upper layer are assembled and added to each other, and sequentially assembled from the lower layer to the upper layer.

[0023]

As described above, in the temporary stairs according to the present invention, when each stair unit is installed in the stair frame, the position of the landing plate above each stair unit is raised by one step of the tread plate. Is lower than the landing board below the staircase unit, so that the slope is gentle and the worker can safely go up and down.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a staircase unit according to the present invention.

FIG. 2 is a perspective view showing a use state of FIG. 1;

FIG. 3 is a perspective view showing a second embodiment of the staircase unit according to the present invention.

FIG. 4 is a perspective view showing a use state of the stairs of FIG. 3;

FIG. 5 is a perspective view showing a state during assembly.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sasara girder 2 Stepping board 3 and 4 Landing board 5 Hanging fitting 11 Building frame 12 Beam member 13 Bracing 14 Horizontal member 15 Prop 16 Joint fitting 17 Beam member A Scaffolding board

Claims (5)

[Claims] 1. A staircase frame comprising at least four pillar members erected at four corners of a quadrilateral and a horizontal beam member connecting the pillar members, and height positions of two opposing faces of the frame. In a temporary staircase composed of a plurality of stair units that are folded over in a folded state, the stair unit is a pair of left and right slabs that are inclined, and a plurality of steps that are attached to the slabs, It is formed by upper and lower dance boards having a greater depth width than the step board, and the distance between the upper and lower landing boards and the step boards of each of the stair units is higher than the height of the lower landing board of the stair unit installed in the upper layer. A temporary staircase characterized in that the height of the stairs is reduced by one step. 2. A beam member for hanging a landing plate below each stair unit on two opposing surfaces of the stair frame, and a beam member provided at a position lower than the beam member by one step of a tread plate. The temporary staircase according to claim 1, further comprising a lower beam member for hanging a landing plate above the lower staircase unit. 3. The stairs girder of each stair unit is protruded from the upper landing plate by the height of one step of a tread plate, and a hook for hanging the beam member of the stair frame is provided at the tip thereof. The temporary staircase according to claim 1, 4. The temporary staircase according to claim 1, wherein the width of each of the staircase units is equal to or less than one half of the effective inner width of the staircase frame. 5. The stair frame is constituted by a plurality of frame units, and after assembling the lower frame unit, the beam unit having a different height position between two facing surfaces of the frame unit is provided. A temporary installation characterized by assembling the stair unit described in the above, as well as extending a scaffolding plate over two beam members opposite to each other at the same height position above, and sequentially assembling upper frame units on the scaffolding plate. How to assemble the stairs.