JPH1162217A - Stairs for provisional scaffold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To regulate the angle of a footboard effectively when the gradient of stairs for a provisional scaffold is changed. SOLUTION: A pair of diagonals 2 are installed parallelly and opposingly, and footboards 3 are arranged at a certain spacing in the longitudinal direction. A shaft 4 installed protrusively at each side of the footboard 3 is borne by the diagonals 2 so that the footboard 3 is rotatable, and the angles of all footboards 3 are made adjustable at one time by coupling them 3 by a link 14 arranged approx. parallel with the diagonals 2. If the gradient of stairs is changed, all footboards 3 are rotated so as to interlock by the link 14 to make them horizontal, and a bolt 7 is inserted in a through hole 9 bored at the periphery of an angle adjusting disc 6 fastened to the shaft 4 of one footboard 3 and fastened to a nut fixed to the side with diagonal 2, and the footboard 3 is secured by fastening the disc 6 to the diagonal 2.

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]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, according to the present invention, a step plate is disposed between a pair of parallel diagonal members at a predetermined interval along a longitudinal direction of the diagonal member. Both side portions of each tread are pivotally mounted on the diagonal member. Then, an angle-adjusting disk having through holes formed at predetermined intervals along the circumference is attached to at least one side of the tread plate. Also,
An angle adjusting bracket is formed on the side of the diagonal member, by which a nut for screwing a fixing bolt inserted through the through hole is fixed, so that the angle of the tread plate can be appropriately adjusted. Further, the invention is characterized in that each of the tread plates is connected to a link member arranged in parallel with the diagonal member so that each tread plate has the same angle at the same time.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION In the staircase for a temporary scaffold according to the present invention, when changing the gradient of the staircase for a temporary scaffold, the staircase is inserted into a through hole of an angle adjusting disk attached to one of the tread plates. Loosen the fixing bolt screwed to the nut on the diagonal member side and release it, release the restriction on the rotation of the tread plate, and adjust one of the tread plates to a desired angle. Then, the other treads connected by the link member also rotate at the same angle in conjunction with each other. When the tread plate reaches a desired angle, it is again inserted into the through hole of the angle adjusting disc, screwed into the nut on the diagonal member side, and tightened to regulate the rotation of the tread plate. As described above, the angle of the entire tread plate can be adjusted only by operating one angle adjustment bracket and the tread plate.

[0007]

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

In the figure, reference numeral 1 denotes a staircase for a temporary scaffold according to the present invention. A pair of diagonal members 2 each having a rectangular pipe having a substantially rectangular cross section are arranged in parallel at a predetermined interval. A tread 3 having a predetermined thickness is provided between the diagonal members 2 at predetermined intervals along the longitudinal direction of the diagonal member 2. Shafts 4 protrude from both sides of these treads 3, and the shafts 4 are fitted into shaft mounting holes formed in the side surfaces of the diagonal members 2, and the treads 3 are respectively centered on the shafts 4. It is rotatable.

The stepping plate 3 positioned at the foremost end is provided with an angle adjusting bracket 5 for adjusting the angle of the stepping plate 3. The angle adjusting bracket 5 includes an angle adjusting disk 6 and a fixing bolt 7. And the nut 8, the angle adjusting disc 6
3 is fixed to a shaft 4 of a tread plate 3 protruding outside the diagonal member 2 as shown in FIG. Further, as shown in FIG. 4, the angle adjusting disk 6 is provided with a large number of through holes 9 along the outer peripheral portion, and the arrangement thereof is arranged concentrically in two rows. In the arrangement, the outer holes 9 and the inner holes 9 are slightly shifted in the circumferential direction from each other, so that the fixing position of the angle adjusting disk 6 can be changed little by little. The angle of the tread 3 can be changed finely.

The nut 8 faces the through hole 9 of the angle adjusting disk 6 and is appropriately fixed to the diagonal member 2. The fixing bolt 7 is passed through the through hole 9 of the angle adjusting disk 6. By screwing on the nut 8 fixed to the diagonal member 2 and tightening the fixing bolt 7, the rotation of the angle adjusting disc 6 is restricted,
The step plate 3 connected to the angle adjusting disk 6 is fixed.

At the tip of the diagonal 2, a lock 10 for securing the temporary scaffold stairs 1 to the frame of the temporary scaffold is fixed, and a base plate 11 is disposed at the end of the diagonal 2. ,
The end of the diagonal member 2 is rotatably mounted on a support member 12 erected on the base plate 11 via a shaft 13.

On the other hand, the corners of each step board 3 are
The link member 14 is disposed at a predetermined distance by a link member 14 disposed substantially in parallel with the link member 14, and the lower end of the link member 14 is connected to a link member receiving piece 15 erected on the base plate 11, thereby forming a diagonal member 2.
When pivoting around the support point of the support member 12 erected on the base plate 11, the link members 14 rotate the respective tread plates 3 at the same angle.

Next, a procedure for changing the gradient of the temporary scaffold stairs according to the present invention will be described. Loosen the fixing bolt 7 of the angle adjusting metal fitting 5 provided on the tread plate 3 located at the tip of the diagonal member 2. The angle adjustment disk 6 is freely rotated by being disengaged from the nut 8 on the diagonal member 2 side.

Then, with the base plate 11 of the diagonal member 2 facing downward, the latch 10 at the tip of the diagonal member 2 is hung on the horizontal member of the building frame. When the base plate 11 is rotated about the shaft attachment portion of the support member 12 at a position where the base plate 11 comes into contact with the ground or a scaffold below, the link member receiving piece 15 of the base plate 11 is rotated. The link member 14 connected to the swash plate 2 rotates the respective tread plates 3 to a substantially horizontal position, and accordingly, rotates the angle adjusting disk 6 disposed on the tread plate 3 at the tip of the diagonal member 2. Let it.

It is checked whether or not any of the through holes 9 of the rotated angle adjusting disk 6 and the nut 8 of the oblique member 2 match in the insertion shape. The diagonal member 2 is further slightly rotated back and forth so that the hole 9 and the nut 8 coincide with each other. When the through hole 9 and the nut 8 coincide with each other, the fixing bolt 7 is inserted into the through hole 9, screwed into the nut 8 fixed to the diagonal member 2, and tightened. The angle of the tread plate 3 is fixed by restricting the rotation of the angle adjusting disk 6.

When the angle between the diagonal member 2 and the base plate 11, that is, the gradient of the temporary scaffold stairs 1 is adjusted in this manner, the angles of all the tread plates 3 are automatically adjusted by the action of the link member 14. Can be. Further, since all the treads 3 are linked by the link member 14, all the treads 3 can be fixed and released only by fixing and releasing one part of the treads 3.

In this embodiment, an example is described in which the angle-adjusting brackets are arranged on the treads located at the tip of the diagonal member. However, since the treads are connected by link members, the angle-adjusting brackets are connected. The same operation and effect can be exhibited by arranging it on any of the tread plates, or by arranging it on the link member receiving piece 15 of the base plate which is the terminal connecting portion of the link member.

In this embodiment, the angle adjusting disk 6 of the angle adjusting bracket is set to be movable and the nut 8 is fixed. However, the opposite, that is, the nut 8 is set to be movable and the angle is adjusted. Since the same operation and effect can be obtained even when the disk 6 is fixed, it may be appropriately selected according to the place and method of use of the stairs.

[0019]

As described above, according to the temporary scaffold stairs according to the present invention, a pair of diagonal members are opposed in parallel, and tread plates are arranged at predetermined intervals along the longitudinal direction thereof. Both sides are rotatably mounted on the diagonal members. At least one of the tread plates is provided with an angle adjustment disk for regulating or canceling the rotation of the tread plate to adjust the angle, a fixing bolt and a nut, and further, each tread plate is provided with a diagonal member. Since the link is connected by a link material arranged almost in parallel with one another, the angle of all the treads can be changed by simply turning one of the treads, and the rotation of the tread is restricted or controlled by the angle adjustment bracket of one tread. The rotation of all the treads can be restricted or released just by releasing, and when changing the slope of the stairs, the angle of the treads can be changed efficiently without any trouble, and the burden on the operator is reduced. 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 an enlarged view of a main part of FIG. 1;

FIG. 4 is a side view of FIG. 3;

[Description of sign]

DESCRIPTION OF SYMBOLS 1 ... Stair for temporary scaffolding 2 ... Diagonal material 3 ... Tread plate 4 ... Shaft body 5 ... Angle adjustment metal fitting 6 ... Angle adjustment disk 7 ... Fixing bolt 8 ... Nut 9 ... Through hole 11 ... Base plate 12 ... Supporting material 14 … Link material 15… Link material receiving piece

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, an angle adjustment disk having perforated holes perforated at predetermined intervals along the circumference is attached to at least one side of the tread plate, and a fixing bolt inserted from the perforated hole on the diagonal member side is attached. An angle adjusting bracket for adjusting the angle of the tread plate by fixing a nut to be screwed is formed, and further, each of the tread plates is connected by a link member disposed substantially parallel to the diagonal member. Stairs for temporary scaffolding.