JP3968164B2 - Temporary scaffolding staircase - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a temporary staircase for temporary scaffolding used for ascending / descending a construction site, and more particularly to a temporary staircase for temporary scaffolding capable of adjusting the angle of a footboard.
[0002]
[Prior art]
The temporary staircase staircase is constructed by attaching a plurality of footboards to a pair of parallel diagonal members at a predetermined interval, and spanning the temporary scaffolds assembled around the building to form a hoistway. . And the slope of this temporary scaffolding staircase often changes variously depending on the situation of the temporary scaffolding. For this reason, as shown in Japanese Utility Model Publication No. 60-129455, an angle adjusting bracket is attached to the footboard to adjust the angle of the footboard. Some are changeable and adaptable to various gradients.
[0003]
[Problems to be solved by the invention]
However, in the temporary scaffold staircase disclosed in the above Japanese Utility Model Publication No. 60-129455, the angle of the tread plate can be changed by the angle adjusting bracket, but the angle adjusting bracket is attached to each tread plate, When changing the slope of the stairs, it is necessary to adjust all of the angle adjusting brackets attached to the respective treads to a desired angle, which involves laborious and inefficient work.
[0004]
This invention makes it a subject to provide the staircase for temporary scaffolds which enabled it to adjust the angle of a step board efficiently when changing the gradient of the staircases for temporary scaffolds in view of said point.
[0005]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention arranges a step plate between a pair of parallel diagonal members at a predetermined interval along the longitudinal direction of the diagonal member, and both sides of each step plate are connected to the diagonal member. At the same time, it is pivotally mounted, and at least one side of the tread plate is attached with an angle adjusting disk with protrusions standing at predetermined intervals along the circumference, and the cross section between the protrusions of the angle adjusting disk is substantially The bent edge of the letter-shaped fixing bracket is exposed and can be moved in and out, the fixing bracket can be fixed to the diagonal member side, and each of the treads is arranged almost parallel to the diagonal member It is characterized by being connected by a link material.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the temporary scaffolding staircase according to the present invention, when changing the slope of the temporary scaffolding staircase, fixing of the fixing bracket having a substantially U-shaped cross section fixed to the diagonal member side corresponding to a predetermined footboard is required. And release the fixing bracket from the angle adjusting disc attached to the tread plate, and remove the bent edge of the fixing bracket from between the protrusions of the angle adjusting disc. Release the restriction of rotation. When one of the treads is adjusted to a desired angle, the other treads connected by the link material are also rotated to the same angle. When the tread is at a desired angle, the bent edge of the fixing bracket is fitted again between the protrusions of the angle adjusting disc, and then the fixing bracket is fixed to the diagonal member side to restrict the rotation of the tread. In this way, the angle of the entire tread can be adjusted simply by operating the angle adjusting bracket and the tread.
[0007]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0008]
In the figure, reference numeral 1 denotes a temporary scaffold staircase according to the present invention, which is a square pipe having a substantially rectangular cross section, to which fixing metal fittings 2 for hooking the temporary scaffold staircase 1 to the building frame of the temporary scaffold are fixed at both ends. A pair of diagonal members 3 are arranged in parallel at a predetermined interval, and a tread plate 4 having a predetermined thickness is maintained between the pair of diagonal members 3 along the longitudinal direction of the diagonal member 3 at a predetermined interval. It is arranged. Shafts 5 are provided on both sides of these treads 4, and the shafts 5 are fitted into shaft holes formed in the side surfaces of the diagonal member 3 so that the treads 4 are rotated around the shafts 5. It is free to move.
[0009]
An angle adjusting bracket 6 that adjusts the angle is disposed on the tread plate 4 near both ends, and the angle adjusting bracket 6 includes an angle adjusting disc 7, a fixing bracket 8, and a nut 9. Further, as shown in FIG. 3, the angle adjusting disc 7 is fixed to the shaft body 5 of the tread plate 4 that protrudes to the outside of the diagonal member 3. Further, as shown in FIG. 4, the angle adjusting disc 7 is provided with a large number of projections 10 extending outward along the outer peripheral portion with a predetermined interval.
[0010]
The fixing bracket 8 has a substantially U-shaped cross section including a back portion 11 and a bent edge portion 12, and has a through hole 13 in the center portion of the back portion 11 and through holes 14 on both sides thereof. Then, the bent edge 12 of the fixing bracket 8 is made to face the angle adjusting disc 7, the shaft body 5 is fitted into the through hole 13 formed in the back portion 11 having a substantially U-shaped cross section, and the through hole 14. The guide pin 16, which is erected on the diagonal member 3 and is provided with a coil spring 15, is fitted into the fixing member 8 so that it can be moved 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 by tightening the nut 9 is formed in the gap between the protrusions 10 of the angle adjusting disc 7. In contrast, they are free to appear and disappear.
[0011]
Further, the corners of the respective treads 4 are connected to the link members 17 arranged substantially parallel to the diagonal members 3 via the connecting pieces 18 with a predetermined distance and connected with pins, and one of the treads 4 is rotated. By doing so, all the footboards 4 are rotated in conjunction with each other.
[0012]
Next, the procedure for changing the gradient of the staircase for temporary scaffolding according to the present invention will be described. The nut 9 of the angle adjustment fitting 6 disposed on the tread plate 4 located near both ends of the diagonal member 3 is loosened, and the coil spring 15 is The bent edge 12 of the fixture 8 is retracted by the restoring force until it is removed from the gap of the protrusion 10 of the angle adjusting disc 7.
[0013]
Then, the locking member 2 at the tip of the diagonal member 3 is hooked on the horizontal member of the building frame and the diagonal member 3 is installed at a predetermined angle. When any one of the footboards 4 is rotated so as to be substantially horizontal, all the footboards 4 are interlocked with each other by the link member 17 to have the same angle. Subsequently, the nut 9 is tightened to press the fixing metal 8 against the angle adjusting disk 7 against the restoring force of the coil spring 15, and the bent edge 12 of the fixing metal 8 is connected to the protrusion 10 of the angle adjusting disk 7. Then, the nut 9 is completely tightened.
[0014]
In this way, the angle formed between the diagonal member 3 and the footboard 4, that is, the gradient of the temporary staircase 1 can be easily adjusted by operating the angle adjusting bracket 6.
[0015]
【The invention's effect】
As described above, according to the staircase for temporary scaffolding according to the present invention, the footboard is disposed between the pair of parallel diagonal members with a predetermined interval along the longitudinal direction of the diagonal material, and both side portions of the respective footboards are arranged. An angle adjusting disk having projections standing at predetermined intervals along the circumference is attached to at least one side of the tread plate while being pivotally attached to the diagonal member, and between the protrusions of the angle adjusting disk. The bent metal edge of the fixing bracket with a substantially U-shaped cross section is faced and can be moved in and out, and the fixing bracket can be fixed to the diagonal member side. Since they are connected by link members arranged in parallel, the angle of all the treads can be changed just by rotating one of the treads, and the rotation of the treads is regulated by the operation of the angle adjustment bracket attached to the predetermined tread. Or restrict or release the rotation of all treads simply by releasing Can, it is possible to reduce the burden of efficiently work to be able to change people without the hassle the angle of the footboard if you want to change the slope of the stairs.
[Brief description of the drawings]
FIG. 1 is a front view of a staircase for a temporary scaffold 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 cross-sectional view taken along line AA in which a part of FIG. 2 is omitted.
FIG. 4 is an enlarged view of a main part of FIG. 1;
[Explanation of sign]
DESCRIPTION OF SYMBOLS 1 ... Temporary scaffolding stairs 2 ... Locking metal fitting 3 ... Diagonal material 4 ... Footboard 5 ... Shaft body 6 ... Angle adjustment metal fitting 7 ... Angle adjustment disk 8 ... Fixing metal fitting 9 ... Nut 10 ... Protrusion 12 ... Edge 15 ... Coil spring 16 ... guide pin 17 ... link material

Claims (1)

A tread plate is disposed between the pair of parallel diagonal members at a predetermined interval along the longitudinal direction of the diagonal member, and both side portions of each tread plate are pivotally attached to the diagonal member, Attach an angle adjustment disk with protrusions at predetermined intervals along the circumference of one side, and attach the bent edge of the fixing bracket with a substantially U-shaped cross section between the protrusions of the angle adjustment disk. A temporary installation characterized in that it can be exposed and retracted, and the fixing bracket is arranged to be fixed to the diagonal member side, and further, each of the stepping plates is connected by a link member arranged substantially parallel to the diagonal member. Scaffolding staircase.

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