JPH11241584A - Temporary scaffold stairs - Google Patents

Abstract

(57) [Summary] PROBLEM TO BE SOLVED: To efficiently adjust the angle of a tread plate when changing the gradient of a stair for a temporary scaffold. A tread plate (4) is rotatably disposed between a pair of diagonal members (3) facing each other by a shaft (5). Further, an angle adjusting disk 7 having projections 10 projecting from the outer peripheral portion at predetermined intervals is fixed to the shaft body 5 of the tread plate 4, and the angle adjusting disk 7 has a bent edge portion 12 having a cross section. The U-shaped fixing bracket 8 faces. Then, the guide pin 16 provided on the shaft 5 and the diagonal member 3 is fitted into the through hole of the fixing member 8, and the bent edge 12 of the fixing member 8 is inserted into the gap between the projections 10 of the angle adjusting disk 7. And the nut 9 is attached to the tip of the shaft 5.
To fix the fixing bracket 8. Further, each of the treads 4 is connected by a link member 17 disposed substantially parallel to the diagonal member 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a staircase for a temporary scaffold used for elevating a construction site, and more particularly to a staircase for a temporary scaffold capable of adjusting an angle of a tread plate.

[0002]

2. Description of the Related Art A stair for a temporary scaffold is formed by mounting a plurality of treads at a predetermined interval on a pair of parallel diagonal members, and extending the diagonal member between temporary scaffolds assembled around a building to form a hoistway. I am trying to do it. The slope of the temporary scaffold stairs often changes depending on the condition of the temporary scaffold. For this reason, as shown in Japanese Utility Model Laid-Open No. 60-129455, an angle adjusting bracket is attached to the tread to change the angle of the tread. Some are changeable and adapt to different gradients.

[0003]

However, in the above-mentioned stairs for temporary scaffolds disclosed in Japanese Utility Model Application Laid-Open No. Sho 60-129455, although the angle of the tread plate can be changed by an angle adjusting bracket, each of the angle adjusting brackets is changed. When changing the slope of the temporary scaffold stairs, it is necessary to adjust all of the angle adjustment brackets attached to each tread to the desired angle, which is a time-consuming and inefficient operation. Accompanied by

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a temporary scaffold stair that can efficiently adjust the angle of the tread when changing the gradient of the temporary scaffold stair.

[0005]

According to the present invention, in order to achieve the above object, a step plate is disposed between a pair of parallel diagonal members at a predetermined interval along a longitudinal direction of the diagonal members. While the both sides of the tread plate are rotatably mounted on the diagonal member, an angle adjustment disk having protrusions provided at predetermined intervals along the circumference is attached to at least one side of the tread plate for angle adjustment. With the bent edge of the fixture with a substantially U-shaped cross section facing between the projections of the disk and being able to come and go freely, the fixture is arranged so that it can be fixed to the diagonal material side. It is characterized by being connected by a link material arranged substantially parallel to the material.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION In a staircase for a temporary scaffold according to the present invention, when changing the gradient of the staircase for a temporary scaffold, a substantially U-shaped cross section fixed to a diagonal member corresponding to a predetermined tread plate. Release the fixation of the fixing bracket of the shape, retreat the fixing bracket from the angle adjusting disk attached to the tread plate, and pull out the bent edge of the fixing metal from between the protrusions of the angle adjusting disk. The restriction on the rotation of the angle adjusting disc is released. And when one of the treads is adjusted to the desired angle,
The other treads connected by the link member also rotate at the same angle in conjunction. When the tread plate has a desired angle, the bent edge of the fixing bracket is fitted again between the projections of the angle adjusting disc, and then the fixing bracket is fixed to the diagonal side to restrict the rotation of the tread plate. As described above, the angle of the entire tread can be adjusted only by operating the angle adjusting bracket and the tread.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral 1 in the figure denotes a temporary scaffold staircase according to the present invention, which has a substantially rectangular cross-section to which locking metal fittings 2 for securing the temporary scaffold staircase 1 to the frame of the temporary scaffold are fixed at both ends. A pair of diagonal members 3 composed of square pipes are arranged in parallel at a predetermined interval, and a tread plate 4 having a predetermined thickness is provided between the pair of diagonal members 3 at a predetermined interval along the longitudinal direction of the diagonal members 3. It is arranged keeping. Shafts 5 protrude from both sides of these treads 4, and the shafts 5 are fitted into shaft mounting holes formed in the side surfaces of the diagonal members 3, and the treads 4 are respectively turned around the shafts 5. It is free to move.

The stepping plate 4 near both ends is provided with an angle adjusting metal fitting 6 for adjusting the angle thereof. The angle adjusting metal fitting 6 includes an angle adjusting disk 7, a fixing metal fitting 8, a nut 9 and As shown in FIG. 3, the angle adjusting disk 7 is fixed to the shaft 5 of the tread plate 4 protruding outside the diagonal member 3. Further, as shown in FIG. 4, a large number of projections 10 are provided on the angle adjusting disk 7 along the outer peripheral portion so as to project outward at predetermined intervals.

The fixing bracket 8 has a back portion 11 and a bent edge portion 12.
The through hole 13 is formed in the center of the back portion 11 and the through holes 14 are formed on both sides thereof.
The bent edge 12 of the fixture 8 is made to face the angle adjusting disk 7, and the shaft 5 is inserted into the through hole 13 formed in the back 11 having a substantially U-shaped cross section. A guide pin 16 erected on the diagonal member 3 and having a coil spring 15 interposed therein is fitted therein, and the fixture 8 is movable back and forth against the coil spring 15. The nut 9 is screwed onto the engraved screw body, and the bent edge 12 of the fixing bracket 8 having a substantially U-shaped cross section is tightened by loosening the nut 9 so as to be in the gap between the projections 10 of the angle adjusting disk 7. On the other hand, they are able to come and go freely.

Also, the corners of each step board 4 are formed by diagonal members 3.
When the tread plate 4 is turned by rotating one of the tread plates 4, the tread plate 4 is turned in conjunction with the link member 17 disposed substantially parallel to the tread plate 4 via a connecting piece 18 while maintaining a predetermined interval. Like that.

Next, a procedure for changing the gradient of the temporary scaffold stairs according to the present invention will be described. Loosen the nut 9 of the angle adjusting bracket 6 disposed on the tread plate 4 located near both ends of the diagonal member 3. Due to the restoring force of the coil spring 15, the bent edge portion 12 of the fixing bracket 8 is retracted until it is pulled out of the gap between the projections 10 of the angle adjusting disk 7.

[0013] Then, the locking fitting 2 at the tip of the diagonal member 3 is hung on a horizontal member or the like of the building frame, and the diagonal member 3 is installed at a predetermined angle. When one of the treads 4 is rotated to be substantially horizontal, all the treads 4 are linked by the link member 17 to have the same angle. Subsequently, the nut 9 is tightened to press the fixing member 8 against the angle adjusting disk 7 against the restoring force of the coil spring 15, and the bent edge 12 of the fixing member 8 is bent.
Is fitted into the gap between the protrusions 10 of the angle adjusting disk 7 and the nut 9 is completely tightened.

In this manner, the angle between the diagonal member 3 and the tread plate 4, that is, the gradient of the temporary scaffold staircase 1, can be easily adjusted by operating the angle adjusting bracket 6.

[0015]

As described above, according to the stairs for temporary scaffolding according to the present invention, a tread is provided between a pair of parallel diagonal members at a predetermined interval along the longitudinal direction of the diagonal members. While the both sides of the tread plate are rotatably mounted on the diagonal member, an angle adjustment disk having protrusions provided at predetermined intervals along the circumference is attached to at least one side of the tread plate for angle adjustment. With the bent edge of the fixture with a substantially U-shaped cross section facing between the projections of the disk and being able to come and go freely, the fixture is arranged so that it can be fixed to the diagonal material side. Since it was connected by link material arranged almost parallel to the material, just turning one of the treads can change the angle of all treads,
In addition, the rotation of all the treads can be restricted or released only by controlling or releasing the rotation of the treads by operating the angle adjusting bracket attached to the predetermined tread, and when the gradient of the stairs is changed, the rotation of all the treads can be restricted or released. The angle can be changed efficiently without trouble, and the burden on the operator can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a temporary scaffold staircase according to the present invention.

FIG. 2 is a side view in which a part of FIG. 1 is cut away.

FIG. 3 is a sectional view taken along line AA of FIG. 2 with a part thereof omitted;

FIG. 4 is an enlarged view of a main part of FIG. 1;

[Description of sign]

DESCRIPTION OF SYMBOLS 1 ... Stairs for temporary scaffolding 2 ... Locking metal fitting 3 ... Diagonal material 4 ... Tread plate 5 ... Shaft body 6 ... Angle adjusting metal fitting 7 ... Angle adjusting disk 8 ... Fixing metal fitting 9 ... Nut 10 ... Protrusion 12 ... Edge 15 ... Coil spring 16… Guide pin 17… Link material

Claims (1)

[Claims] 1. A step plate is disposed between a pair of parallel diagonal members at a predetermined interval along a longitudinal direction of the diagonal member, and both side portions of each tread plate are rotatably mounted on the diagonal member. On the other hand, at least one side of the tread plate is attached with an angle-adjusting disk having projections erected at predetermined intervals along the circumference, and a bracket having a substantially U-shaped cross section is folded between the projections of the angle-adjusting disk. With the curved edge facing and free to come and go, the fixing bracket is arranged so that it can be fixed to the diagonal material side, and each of the treads is connected by a link material arranged almost parallel to the diagonal material A staircase for temporary scaffolding.