JP3162943U - Scaffolding stairs - Google Patents

Abstract

Provided is a staircase for a scaffold that secures a wide stepping area, suppresses an increase in weight, and reduces a boarding area for forming a stepping board material and a reinforcing board material. A square pipe 14a having a pair of engaging portions that can be locked to a horizontal member and arranged in parallel as a pair, and a plurality of tread members 15 whose left and right ends are welded to the square pipe 14a are provided. The footboard material 15 is a staircase for scaffolding that includes a projecting plate portion 19 having a lateral width narrower than the interval between the square pipes 14a and protruding from the side of the square pipe 14a. Folded portions 21 and 22 are formed by bending the material 15, and the lower portions are welded to the left and right sides of the front bent portion 21 at the inner side of the square pipe 14 a with a distance from the welded portion of the tread plate material 15. The upper portions of the left and right reinforcing plate members 24 are welded, and a portion of the reinforcing plate member 24 that protrudes from the square pipe 14a when viewed from the side is accommodated in the projecting plate portion 19 when viewed in plan. [Selection] Figure 3

Description

The present invention relates to a staircase for a scaffold used in a construction site or the like.

In construction sites, etc., temporary scaffolding is provided around the building in the middle of construction to secure the worker's work floor, etc. The temporary scaffolding is attached with stairs for scaffolding used by the workers to go up and down It is done. Some of the staircases for scaffolding have a wide stepping area so that an operator can safely go up and down, and specific examples thereof are described in Patent Documents 1 and 2.
In both of the staircases for scaffolding of Patent Documents 1 and 2, a tread plate material (step plate) projects from a pair of left and right pipe materials (support materials) in a side view, and a wide stepping area is secured. In addition, when the staircase for the scaffolding was piled up, the protruding part of the stepping board material was prevented to prevent the protruding part of the stepping board material of one scaffolding staircase from being sandwiched inside the pipe material of the other scaffolding staircase. The left and right widths of the part are formed narrower than the distance between the pair of pipe members.

Japanese Patent No. 4177827 JP 2009-30343 A

However, in the staircase for scaffolding of Patent Document 1, the reinforcing plate material (reinforcing plate) that supports the tread plate material is formed in a rectangular shape that is substantially the same width as the interval between the pair of left and right pipe members, so that the reinforcing plate material itself has a certain amount. There is a weight, and by providing a plurality of reinforcing plate members, the staircase for scaffolding becomes heavy. And since the tread board material and the reinforcing board material are formed by bending a single metal plate body, there is a problem that the area of the plate cutting is large.
Further, in the staircase for scaffolding of Patent Document 2, the place where the bracket that supports the tread material is welded to the pipe material is close to the welded place of the tread material to the pipe material, so the load generated on the bracket is large. In order to ensure the strength, it is necessary to increase the thickness of the bracket, and as in Patent Document 1, there is a problem that the staircase for scaffolding becomes heavy.
The present invention has been made in view of such circumstances, and a scaffold that secures a wide stepping area, suppresses an increase in the weight of the entire staircase for a scaffold, and further reduces a planing area for forming a stepping board material and a reinforcing board material. The purpose is to provide a staircase.

The staircase for scaffolding according to the present invention that meets the above-mentioned purpose is provided with a metal square pipe arranged in parallel with a pair of engaging portions that can be locked to a horizontal member at both ends, and the pair of square pipes. A plurality of metal tread members that are arranged on the inner side at predetermined intervals and whose left and right ends are welded to the pair of square pipes, and the tread plates are viewed from the side of the pair of square pipes A scaffolding staircase having a projecting plate portion protruding outward, wherein the lateral width of the projecting plate portion is narrower than the interval between the pair of square pipes, and the tread plate material is folded before and after each tread plate material A bent portion formed on the left and right sides of the bent portion on the front side that is bent in a range of 110 to 130 degrees, and a lower portion is welded to the tread plate material on the inside of the paired square pipe. Are welded to the upper portions of the left and right reinforcing plate members, which are welded at a distance, And a side view with a strong plate material projects from square pipe forming the pair portion is fit into the Zhang Deban portion in plan view.

In the staircase for scaffolding according to the present invention, it is preferable that the tread material is formed with a plurality of anti-slip holes subjected to burring.

In the staircase for scaffolding according to the present invention, the reinforcing plate is preferably an L-shaped flat plate.

The staircase for scaffolding according to any one of claims 1 to 3, comprising a projecting plate portion that projects outward from a side view of a square pipe with which a treadboard material is paired, so that a wide stepping area can be provided to an operator who goes up and down the staircase for scaffolding. Can be secured.
In addition, on the left and right sides of the bent part on the front side of the tread material, the upper part of the left and right reinforcement plates welded to the inside of the square pipe with which the lower part is paired is welded with a distance from the welded part of the tread material. 1) The tread material is supported without using the same width as the tread material, and 2) The welded part of the reinforcing plate (lower part) and the square pipe are close to the welded part of the tread material and the square pipe. Compared to the case where the load is generated, the load generated on the reinforcing plate material that supports the tread material is small, the thickness of the tread material can be reduced, and the weight of the staircase for the scaffold can be reduced.

The reinforcing plate material is a plate material different from the tread material, and the width of the upper portion of the reinforcing plate material welded to the left and right sides of the bent portion of the tread material is narrower than the width of the tread material. Compared to the one formed by bending a single plate material, the plate area for forming the reinforcing plate material and the tread plate material can be reduced.
Furthermore, the overhanging plate portion is narrower than the interval between the paired square pipes, and the portion protruding from the square pipe when viewed from the side with the left and right reinforcing plate materials is in the overhanging plate portion of the tread plate material in plan view. Because it fits, the staircase for the scaffold can be overlapped without touching the corner pipe of the other staircase staircase, as seen from the side of the one staircase staircase. The stairs can be easily separated without generating frictional forces.

In particular, the scaffold staircase according to claim 2 is provided with a plurality of anti-slip holes formed in the tread plate material so as to be able to ascend and descend the scaffold staircase without sliding the foot. An environment can be provided.

In the staircase for scaffolding according to claim 3, since the reinforcing plate is an L-shaped flat plate, the reinforcing plate does not require bending in the manufacturing process, and the manufacturing cost can be reduced.

(A) and (B) are respectively a partial plan view and a partial front view of a staircase for scaffolding according to an embodiment of the present invention. It is a side view of the staircase for scaffolding. It is a partial side view of the staircase for the scaffolding.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIG. 1 to FIG. 3, a staircase 10 for a scaffold according to an embodiment of the present invention is provided with engaging portions 12 and 13 that can be locked to horizontal members 11 and 11 a at both ends. A plurality of metal square pipes 14, 14 a arranged in parallel and a plurality of square pipes 14, 14 a that are arranged inside the pair of square pipes 14, 14 a at a predetermined interval and are welded to the pair of square pipes 14, 14 a. And a metal tread material 15.
The horizontal members 11 and 11a are horizontally arranged round pipes that form handrails or the like in the temporary scaffolding, and the horizontal member 11 is provided at a position higher than the horizontal member 11a.

As shown in FIGS. 1A, 1B, and 2, the square pipes 14 and 14a have a length of 2 to 3 m, a thickness of 1.5 to 1.8 mm, and a cross section of a long side. Is a rectangle with a short side of 15 to 30 mm. The square pipes 14 and 14a are plated on the surfaces to prevent rust.
The engaging portions 12 and 13 are provided at one end and the other end of the square pipe 14 (the same applies to the square pipe 14a). The staircase 10 for scaffolding is fixed to the horizontal members 11 and 11a in a state where the square pipes 14 and 14a are inclined by locking the engaging portions 12 and 13 to the horizontal members 11 and 11a, respectively.

The engaging portion 12 includes a C-shaped flat plate member 16 fixed to the square pipe 14 by a known screw member, and the flat plate member 16 includes a substantially 3/4 region including the upper half of the outer periphery of the horizontal member 11. Is secured to the horizontal member 11. In addition, the engagement angle of the engaging portion 12 with respect to the square pipe 14 can be changed, and the orientation of the flat plate member 16 is adjusted according to the positional relationship of the horizontal member that locks the engaging portions 12 and 13.
The engaging portion 13 includes a U-shaped flat plate member 17, and an inner peripheral region of the U-shaped flat plate member 17 is brought into contact with the horizontal member 11 a obliquely from the upper side and is locked to the horizontal member 11 a.
Hereinafter, the posture of the staircase 10 for scaffolding when the engaging portions 12 and 13 are respectively hooked on the horizontal members 11 and 11a (the state where the square pipes 14 and 14a are inclined as shown in FIG. 2). The position of each member etc. which comprises the staircase 10 for scaffolds on the basis of is described.

Inside the pair of square pipes 14 and 14a, a plurality of (seven in this embodiment) tread members 15 are arranged at equal intervals.
As shown in FIGS. 1 (A), 1 (B), and 3, the tread material 15 is welded to the square pipes 14, 14 a on the base side, and the square pipe 14, as viewed from the side, in front of the welded portion. The projecting plate portion 19 protrudes outward from 14a, and the projecting plate portion 19 allows the worker to go up and down the scaffolding stairs 10 to have a certain area (for example, the width of the tread plate material 15). Is 300 to 400 mm, the depth is 170 to 200 mm, and the area is 51000 to 80000 mm ² ).
The overhanging plate portion 19 is rectangular, and is formed such that the left and right width is narrower than the interval between the square pipes 14 and 14a, and between the overhanging plate portion 19 and the square pipe 14 in plan view, and the overhanging plate portion 19. A gap of 8 to 15 mm is provided between the square pipe 14a and the square pipe 14a.

A plurality of anti-slip holes 20 whose peripheral edges protrude to the surface side (upward) of the tread board material 15 by burring are formed on the entire tread board material 15 including the overhanging plate portion 19.
Bending portions 21 and 22 formed by bending the tread plate material 15 are provided before and after the tread plate material 15, respectively, and the strength of the tread plate material 15 is maintained by the bent portions 21 and 22.
The front bent portion 21 is formed by bending the tread material 18 by θ1 (110 ° ≦ θ1 ≦ 130 °), and the rear bent portion 22 is formed by θ2 (80 ° ≦ θ2 ≦ 100 °) of the tread material 18. It is formed by bending.
In the tread plate material 15, the left end and the right end of the portion (including the rear bent portion 22) on the base side from the overhang plate portion 19 are welded to the square pipes 14 and 14 a, respectively.

The front bent portion 21 has a rectangular plate shape, and reinforcing plate members 23 and 24 that support the tread plate material 15 from below are fixed to the left and right sides (both sides) of the bent portion 21, respectively.
The reinforcing plate members 23 and 24 are L-shaped flat plate materials each having a thickness of 2.5 to 3.5 mm. The reinforcing plate members 23 and 24 are welded to the left and right sides of the bent portion 21 at the upper part and to the inner side face of the square pipe 14 and the inner side face of the square pipe 14a, respectively.
The upper part of the reinforcing plate member 23 (the same applies to the reinforcing plate member 24) is superposed on the bent portion 21. Further, the lower part of the reinforcing plate member 23 is welded to the square pipe 14 at a distance of, for example, 130 to 170 mm from a portion where the step plate member 15 is welded to the square pipe 14 (that is, the base side of the step plate member 15). When supporting the tread plate material 15, the load generated in the upper and lower welded portions of the reinforcing plate material 23 and the reinforcing plate material 23 are suppressed.

The reinforcing plate member 23 is formed continuously from a rectangular long side portion 25 that protrudes from the square pipes 14 and 14 a in a side view and is welded to the bent portion 21 on the upper side, and a lower end of the long side portion 25. It is comprised by the short side part 26 protruded in the left-right direction welded to the pipes 14 and 14a.
The long side portion 25 is disposed at a position where the long side portion 25 is accommodated in the overhang plate portion 19 in a plan view, and a portion protruding from the square pipes 14 and 14a in a side view of the scaffolding staircase 10 (that is, the overhang plate portion 19). And the long side part 25) is arrange | positioned inside the square pipes 14 and 14a by planar view.
Therefore, as shown in FIG. 3, when a plurality of scaffolding stairs 10 are overlapped, the scaffolding stairs 10 is placed between the other square pipes 14 and 14a of one scaffolding stairs 10 (shown in phantom lines). The overhanging plate part 19 and the long side part 25 (that is, the part protruding from the square pipes 14 and 14a in a side view) of the scaffolding staircase 10 (shown by a solid line) are fitted, and the corners of the upper and lower scaffolding staircases 10 are inserted. The pipes 14 and 14a overlap. As a result, the square pipes 14 and 14a of one scaffolding staircase 10 do not sandwich the overhanging plate part 19 or the long side part 25 of the other scaffolding staircase 10, and the scaffolding staircases 10 are overlapped. It can be avoided that it becomes difficult to separate the two.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described form, and all changes in conditions and the like that do not depart from the gist are within the scope of application of the present invention.
For example, the members and parts constituting the staircase for scaffolding such as a square pipe are not limited to the above-described size, and can be appropriately sized according to the temporary scaffold using the staircase for scaffolding.

10: Staircase for scaffolding 11, 11a: Horizontal member, 12, 13: Engagement part, 14, 14a: Square pipe, 15: Tread plate member, 16, 17: Planar plate member, 19: Overhang plate member, 20: Anti-slip holes, 21 and 22: bent portion, 23 and 24: reinforcing plate material, 25: long side portion, 26: short side portion

Claims (3)

Metal square pipes arranged in parallel with a pair of engaging portions that can be locked to a horizontal member at both ends, and arranged at predetermined intervals inside the pair of square pipes, A plurality of metal tread plates that are welded to the pair of square pipes, and the tread plate material includes a projecting plate portion that protrudes outward in a side view from the pair of square pipes. A staircase for scaffolding in which the left and right width of the exit plate part is narrower than the interval between the pair of square pipes,
Before and after each tread material, there is a bent portion formed by bending the tread material, and the lower part is paired with the pair on the left and right sides of the front bent portion bent in the range of 110 to 130 degrees. The upper portions of the left and right reinforcing plate members that are welded at a distance from the welded portion of the tread plate material are welded to the inner side of the square pipe, and the paired corners are seen in side view with the left and right reinforcing plate members. The staircase for scaffolding, wherein a portion protruding from the pipe is accommodated in the projecting plate portion in plan view. The staircase for scaffolding according to claim 1, wherein the tread material is formed with a plurality of anti-slip holes that are subjected to burring. The staircase for scaffolding according to claim 1 or 2, wherein the reinforcing plate member is an L-shaped flat plate member.

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