JPH11256811A - Installation method of chain suspended staircase and staircase scaffold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an installation method of a chain suspended staircase with high safety as well as high work efficiency and the construction of staircase scaffold suitable for the method. SOLUTION: Instead of an installation method of a conventional chain suspended staircase, the chain suspended stair case 1 is prepared, the chain suspended staircase is connected to the lower part of a suspended framing 2 having a pace on the upper surface thereof, the suspended framing 2 is mounted on the upper surface of a framing 30, and then, the suspended framing is connected to the framing. Instead of the construction of a conventional staircase scaffold, a staircase scaffold is equipped with the chain suspended staircase 1, the suspended framing 2 having the pace on the upper surface thereof and connecting the chain suspended staircase to the lower surface thereof and the framing 30 connecting the suspended framing to the upper surface of the framing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for installing a chain-type hanging staircase and a stair scaffold using the chain-type hanging staircase, and more particularly to a method for installing a chain-type hanging staircase which can be safely and easily performed, and to the method The present invention relates to a stair scaffold using a suitable chain-type hanging stair.

[0002]

2. Description of the Related Art In a plant construction site, a large tank construction site, and the like, it is often necessary for workers to move to high places and low places. In such cases, a temporary stair scaffold is used. As one of the stair scaffolds, one utilizing a chain-type hanging staircase is used. The chain-type hanging staircase includes a chain, a landing, and a staircase, and the chain is suspended so as to connect a plurality of landings in a vertical direction, and the staircase is suspended between the landings.

[0003] An example of a chain-type hanging staircase will be described with reference to the drawings. FIG. 4 shows a chain-type hanging staircase 1 according to the conventional method.
It is a perspective view of the stair scaffold in which was installed. In the figure, a chain-type hanging staircase 1 is suspended below a frame 30 made of H steel material. The chain-type hanging staircase 1 includes a plurality of landings 10 (hereinafter, referred to as a stage 10), a staircase 11 (hereinafter, referred to as a ladder 11) that is obliquely bridged between upper and lower stages, a chain 12 that connects the stage 10 at regular intervals, And a handrail 13. Stage 1
Numeral 0 has a substantially rectangular horizontal plate shape, and is made of a frame made of square pipes and a floor plate stretched over the frame.
The floor plate of the stage is provided with a rectangular notch in substantially half of the floor plate. Eye plates 14 are provided above and below the four corners of the stage 10. The ladder 11 is made up of two side plates 15 and a plurality of tread plates 16. A plurality of treads 16 are arranged at equal intervals between the side plates 15. Ladder 11
Is rotatably attached to one side of the notch of the stage 10, and the other end is mounted on the upper surface of the lower stage 10. The chain 12 connects the upper and lower stages 10. Both ends of the chain 12 are shackled to eye plates 14 at four corners of the stage 10, respectively. The handrail 13 is stretched around the stage 10, and its four corners are locked to the chain 12. When the chain 12 of the chain-type hanging staircase 1 is loosened, the ladder 11 fits into the notch of the stage 10 and the stages 10 are directly stacked. In this way, the hanging staircase 1 with a chain becomes compact and can be easily transported.

Next, an example of the structure of a conventional stair scaffold made using the chain-type hanging stairs 1 will be described. FIG. 5 is a side view of an example of a conventional stair scaffold. In the figure, a part of the central part of the chain-type hanging staircase 1 is omitted. The stair scaffold is composed of a chain-type hanging stair 1 and a gantry 3 for hanging it. The gantry 3 is composed of a frame 30 made of a shape steel and a column 31 for supporting the frame. A connecting portion for connecting the chain-type hanging staircase 1 is provided below the overhang of the frame 30. The joint is provided with four eye plates 14 facing downward. Chain-type hanging stairs 1
Is connected to the eye plate 14 with a shackle.

Next, a conventional installation method of the chain-type hanging staircase 1 for forming a stair scaffold having this structure will be described. First, the gantry 3 is installed. The gantry 3 includes a frame 30 for hanging the chain-type hanging stairs 1 and columns 31 for supporting the frame. An eye plate 14 is installed at a joint of the frame 30 that joins the chain-type hanging stairs 1.
The gantry 3 is installed so that the joint is located above the place where the stair scaffold is to be installed. Next, the chain-type hanging stairs 1 that are stacked and integrated are transported by a crane under the installation place of the stair scaffold. The stage on the top floor of the chain-type hanging staircase 1 is lifted by a crane. At this time, the chain-type hanging stairs 1 are gradually developed while being lifted. The stage 10 on the top floor of the chain-type hanging staircase 1 is
With a crane so that it is directly under the joint. Next, the uppermost chain 12 of the chain-type hanging staircase 1 is connected to the eye plate 14 of the frame 30. Thereafter, a floor plate 60 and a handrail 61 are provided on the frame.

An operation for connecting the chain 12 to the eye plate 14 will be described below. A worker works on the stage 10 on the top floor of the chain-type hanging staircase 1 suspended by a crane. This is a very unstable job, so be careful with a lifeline and safety. Therefore, much time is required to connect the chain 12 to the connection portion of the frame 30. In this work, the worker stands on an unstable scaffold and works while being restrained by a lifeline, resulting in poor workability. for that reason,
Further work is required. On the other hand, a temporary scaffold may be installed around the joint of the frame 30 for the operation of joining the chain 12 to the eye plate 14. According to this method, work safety and workability can be reliably ensured. However, installing and dismantling temporary scaffolding requires a great deal of time, which has a major impact on the overall construction schedule.

[0007]

As described above, the conventional method of installing the chain-type hanging staircase 1 and the structure of the staircase scaffolding work when the chain 12 is connected to the connecting portion of the frame 30 while standing on an unstable scaffold. The workability was poor, and it had to be done with great care and safety. Therefore, a lot of time was required for the work. With the method of constructing a temporary scaffold, much more time was required for the work.

The present invention has been devised in view of the above-mentioned problems, and provides a method of installing a chain-type hanging staircase which can easily ensure safety and is excellent in workability, and a stair scaffold suitable for the work. Things. Furthermore, the present invention provides a method of installing a chain-type hanging staircase and a staircase scaffold which can be performed in a minimum appropriate working time.

[0009]

In order to achieve the above object, a method of installing a chain-type hanging staircase according to the present invention is a method of installing a chain-type hanging staircase for installing a chain-type hanging staircase on a frame. A suspension staircase is prepared, a chain suspension staircase is connected to a lower part of a suspension frame having a landing on an upper surface, and the suspension frame is placed on an upper portion of the frame, and then the suspension frame and the frame are joined.

According to the configuration of the present invention, a chain-type hanging stair is prepared to prepare for the next operation. A chain-type hanging stair is connected to a lower part of a hanging frame having a landing on an upper surface, and the chain-type hanging stair is hung below the hanging frame. The suspension frame is placed on the upper part of the frame, and the suspension frame is supported from below by the frame. Therefore, even if the suspension frame is not fixed to the frame, the chain-type suspension stairs and the suspension frame are integrally supported by the frame. Thereafter, the suspended frame is joined to the frame so that the suspended frame does not come off the frame.

Further, in order to achieve the above object, a stair scaffold according to the present invention is a stair scaffold, comprising: a chain-type hanging stair; a hanging frame having a landing at an upper portion and connecting the chain-type hanging stair at a lower portion; The suspension frame is connected to the frame, and the suspension frame and the chain-type suspension stairs can be integrally removed from the frame.

According to the structure of the present invention, a suspension frame having a landing at the top and a chain-type suspension at the bottom can be used as a landing for stairs, and a chain-type suspension at the bottom can be suspended. it can. Further, the frame can stably support the integrated hanging frame and the chain-type hanging stairs. Thereafter, the frame having the suspended frame joined to the upper surface can stably support the suspended frame. With this structure, the above installation method can be adopted.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In each of the drawings, common portions are denoted by the same reference numerals, and redundant description will be omitted.

FIG. 1 is a perspective view showing an embodiment of a stair scaffold according to the present invention. A case where a stair scaffold is installed on a large steep concrete wall 4 will be described as an example. A frame 30 is installed above the concrete wall 4. In this embodiment, the frame 30 has a cantilever structure of two H-section steels. The frame 30 is supported by columns (not shown). The suspension frame 2 is mounted on the upper portion of the frame 30.
The suspension frame 2 includes a frame 22, a floor plate 20, and a handrail 21. The lower surface of the frame 22 of the suspension frame 2 is the frame 30
And the frame 30 and the suspension frame 2 are joined by bolts. The upper surface of the floor plate 20 of the suspension frame 2 is a landing, and a handrail 21 is stretched around the landing. A part of the landing is cut into a substantially rectangular shape, and a ladder 11 for descending downward is rotatably attached to one of the pieces. An eye plate 14 is attached to a lower portion of the suspension frame 2, and the eye plate 14 is connected to a chain 12 on the top floor of the chain type suspension staircase 1 via a shackle. Below the chain 12, a chain-type hanging staircase 1 is suspended. The chain-type hanging staircase 1 has the same structure as that of the related art. By employing this structure, a chain-type hanging staircase 1 described below can be used to make a staircase scaffold.
Can be adopted.

Next, an embodiment of a method of installing a chain-type hanging staircase of the present invention will be described. FIG. 2 shows an embodiment in which a stair scaffold having the above structure is installed by the installation method of the present invention. In the figure, arrows indicate the order of each operation. (A)
First, a support 31 (not shown) is fixed to a foundation, and a frame 3 is fixed.
0 is placed on its support 31 (not shown). Lower the folded chain-type hanging staircase 1 below the installation location. (B)
Next, the suspension frame 2 is lowered above the chain suspension stairs 1 by the crane 5. Eye plates 1 at the four corners under the suspension frame 2
4 is connected to one end of a chain 12 on the top floor of the chain-type hanging staircase 1. The other end of the chain 12 on the top floor is connected to eye plates 14 at four corners on the upper surface of the stage 10 on the top floor of the chain-type hanging stairs 1 in advance.
(C) Hanging frame 2 and chain-type hanging stairs 1 with crane 5
Lift as one. As the suspension frame 2 is lifted, the chain-type suspension frame 1 is deployed from the folded state. The suspension frame 2 is placed on the upper portion of the frame 30. (D) The worker gets on the landing of the hanging staircase 2 and connects the frame 30 and the frame 22 of the hanging frame 2 with bolts.

According to the present embodiment, the suspension frame 2 also serving as a landing and the chain-type suspension staircase 1 can be installed integrally, and a handrail 21 can be provided in advance on the suspension frame 2. The worker can join the frame 30 and the suspension frame 2 in a state where the safety is sufficiently secured on the suspension frame. Therefore, the work of installing the chain-type hanging stairs 1 becomes easy, and the work can be performed in a short time. Furthermore, the stair scaffold can be used immediately after the chain-type hanging stairs 1 are installed, and the schedule of the entire construction can be shortened. In addition, since the suspension frame 2 is bolted to the frame 30, the suspension frame 2 and the frame 30 have a strong integrated structure.

Next, an example in which the stair scaffold of the present invention is applied to a pre-tank construction site will be described with reference to the drawings. FIG. 3 is a side view of the present embodiment. In this figure, the middle part of the chain suspension staircase is omitted. This stair scaffold is installed to descend from the shoulder of the tank to the tank bottom after the concrete side wall 4 of the underground tank is completed. A knuckle plate 50 is provided on the shoulder of the tank. The gantry 3 is installed on the shoulder of the tank. The gantry 3 includes a column 31 and a frame 30. The column 31 is installed on the upper surface of the tank shoulder, and supports the frame 30. The suspended frame 2
It is connected to the upper part of the frame 30 by bolts. A chain of the tune type suspension staircase 1 is connected to a lower portion of the suspension frame 2. The upper surface of the suspension frame 2 is a landing. A round corridor 51 is provided around the knuckle plate 50. A landing 52 is provided above the knuckle plate 50 and is connected to the surrounding corridor 51 by stairs.
A stair is provided to descend from the landing 52 on the knuckle plate 50 to the landing of the suspension frame 2.

The present invention is not limited to the embodiments described above, and various changes can be made without departing from the gist of the invention. For example, the method of connecting the frame 30 and the suspension frame 2 is not limited to bolt connection, but may be, for example, welding connection. In the description, a temporary stair scaffold has been described, but the present invention can also be applied to a permanent stair scaffold.

[0019]

As described above, the installation method of the chain-type hanging staircase and the staircase scaffolding of the present invention enable the suspension frame also serving as a landing and the chain-type hanging staircase to be installed integrally. The worker can join the frame and the suspension frame safely on the landing on the safe suspension frame. Therefore, the installation work of the chain-type hanging stairs becomes easy, and the work can be performed in a short time. Furthermore, the stair scaffold can be used immediately after the installation of the chain-type hanging stairs, and the schedule of the entire construction can be shortened.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of a chain-type hanging staircase of the present invention.

FIG. 2 is a conceptual diagram showing how to install a chain-type hanging staircase of the present invention.

FIG. 3 is a side view of an embodiment of the stair scaffold of the present invention.

FIG. 4 is a perspective view of a conventional chain-type hanging staircase.

FIG. 5 is a side view of a conventional stair scaffold.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chain-type hanging staircase 2 Suspended frame 3 Gantry 4 Concrete wall 5 Crane 10 Stage 11 Ladder 12 Chain 13 Handrail 14 Eye plate 15 Side plate 16 Tread plate 20 Floor plate 21 Handrail 22 Frame 30 Frame 31 Post 50 Knuckle plate 51 Hallway 52 60 floorboard 61 handrail

Claims (2)

[Claims] 1. A method of installing a chain-type hanging staircase for installing a chain-type hanging staircase on a frame, comprising a chain-type hanging staircase (1) and a lower portion of a hanging frame (2) having a landing on an upper surface. A method of installing a chain-type hanging staircase, comprising: combining a chain-type hanging staircase with the frame, mounting the hanging frame on an upper portion of the frame (30), and then joining the hanging frame and the frame. 2. A stair scaffold comprising: a chain-type hanging stair (1); a hanging frame (2) having a landing on an upper surface and connecting the chain-type hanging stair at a lower portion; and the hanging frame is joined to an upper surface. A stair scaffold comprising a frame (30), from which a hanging frame and a chain-type hanging stair are integrally removable.