JP6444725B2 - Suspension scaffold for falling object protection device and installation method of suspension scaffold on slope - Google Patents

Description

  The present invention relates to a construction technique of a fallen object protection device that protects falling rocks and avalanches from a slope, and particularly relates to a suspension scaffold used for the construction and a method of installing a suspension scaffold on a slope.

  As fallen object protection devices, for example, rockfall protection fences and pocket type rockfall protection nets that prevent roads running between mountains from falling rocks and avalanches are conventionally known.

FIG. 9 shows a rock fall protection fence 100 as an example of these fallen object protection devices.
A rock fall protection fence 100 in FIG. 9 includes a plurality of columns 101 that are erected at intervals in the slope width direction, and support ropes 103 that are stretched in the slope width direction via the upper or lower portion of each column 101. 104 and a protective net 105 that is developed and supported in the slope width direction by the support ropes 103 and 104 and the respective columns 101.
In FIG. 9, reference numerals 103a and 104a denote shock absorbing brake devices provided on the support ropes 103 and 104. The brake device extends the support ropes 103 and 104 while applying a constant braking force during the impact action, and applies an impact. relieve.

In addition, the following methods are known as a method for laying a protective net.
The first is a method applied to a pocket-type rockfall protection net.
The pocket-type rockfall protection net has a support column that projects to the front of the slope. Raise the guard from the bottom to the top and tie the protective net to the top horizontal rope.

The second method is a method applied to a rockfall guard fence having a right-angled sloped support.
Here, the right-angle sloped column is a column with a right angle between the ramp and the column with the column upright, and the upper part of the column is the hand of the operator like the pocket-type falling object protection net. It is supported at a high position that does not reach.
For this reason, in order to enable high-altitude work at the top of the column, the wire rope that serves as a scaffold is tightly stretched across the steps between the column and the column, and the operator passes along the wire rope that is stretched between the columns. Install a protective net while walking.

The third is a method applied on a relatively gentle slope.
In this example, a scaffold is constructed using temporary materials such as a single pipe and a scaffold plate on the sloped valley side of the support column, and the worker works on the scaffold. The scaffold will be dismantled and removed and removed after the work is completed.

JP 2009-024378 A

By the way, the above-mentioned method for laying a protective net has room for improvement in the following points.
In the first method, since the worker always hangs up and works, the burden on the body is heavy and the work efficiency is poor. In addition, the protective net laying work is usually done by two people, but due to safety rules, the worker's up and down work (the work of another worker working overhead) is prohibited. There are also limitations in terms of work.

  The second method uses a wire rope stretched between struts as a scaffold, but since the struts are tilted toward the slope valley side, the hand is farther to the slope valley side than the standing position. Therefore, the worker must work in an unreasonable posture so as to lean on the sloped valley side. In addition, although the wire rope is tightly tightened by a tightening device, the work is only performed on a flexible wire rope, which is unstable compared to a scaffold plate or the like.

  The third method uses a temporary material to assemble a stable scaffold on the slope, so workability is good. However, the temporary material can be carried in and assembled, and dismantled after the work is completed, removed and carried out. Incidental work accompanying the increase. In particular, when a protective net is installed over a wide area, many temporary materials are required, which is disadvantageous in terms of cost and shortening the construction period. Furthermore, it is necessary to consider the damage of the scaffolding against unexpected rockfalls and the recovery work after the disaster.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a suspended scaffold that can secure a scaffold with good workability on a slope with a simple structure. Moreover, the installation method is provided.

In order to solve the above technical problem, the present invention provides:
Falling objects having a plurality of support columns standing at intervals in the width direction of the slope and protecting the falling objects supported in the slope width direction by the plurality of support columns in order to protect falling objects from the slope surface A suspension scaffold for a protective device,
It has the scaffold support material suspended from the upper part of each said support | pillar, and the scaffold material supported by this scaffold support material and extended in the slope width direction.

According to the present invention, the scaffolding material is extended in the slope width direction, and the scaffolding material is suspended from the upper part of each column and supported in the air. Therefore, the worker can work on the scaffolding material supported by the plurality of columns. Here, the slope width direction is a direction that intersects the slope direction (mountain valley direction) of the slope.
The support column is provided so as to be inclined in the valley side direction, and the fallen object protection body can be supported on an upper portion of the support column.
In this way, the operator's hand is closer to the worker's standing position toward the upper part (high place) of the support column, so that the operator can perform work near the support column without taking an unreasonable posture. In particular, when constructing a fallen object protection apparatus having a column inclined forward of the slope, the work can always be directed to the slope mountain side, so that the work of lifting the protective body can be performed efficiently. In addition, the suspension scaffold of the present invention has few components and is advantageous in terms of maintenance and management such as installation, dismantling and restoration, and cost.

  In addition, the scaffold material is secured with rigidity capable of maintaining its initial shape before and after suspension.

  In this configuration, by ensuring the rigidity of the scaffold material, the lateral movement of the worker on the scaffold material is facilitated. In the above, “the initial shape can be maintained” means that it is sufficient that the scaffolding material retains the original shape before and after the suspension, a slight deformation caused by the deformation of the bending due to its own weight and the placement of the operator. Bending and twisting are excluded.

  Moreover, the said scaffold material and the said scaffold support material are comprised with the steel pipes, It is characterized by the above-mentioned.

  According to this structure, since steel pipe is used as a scaffolding material and a scaffolding support material, high yield strength and rigidity against bending and twisting can be obtained. In addition, since a general-purpose single pipe can be applied, the procurement cost of materials can be reduced at the time of introduction of a suspended scaffolding or at the time of unexpected damage. In addition, by using a general-purpose clamp for a single pipe, it is easy to assemble each part, and the time required for installing and dismantling the suspension scaffold can be shortened.

  Further, the scaffold support member may be detachably suspended from the support column.

  According to this configuration, the entire suspended scaffold can be easily installed and removed in a short time by attaching and detaching the scaffold support material when the suspended scaffold is installed and when the suspended scaffold is removed.

  Moreover, it has further an angle setting member for setting the angle which the said support | pillar and the said scaffold support material make to a desired angle.

  In these configurations, the angle between the support column and the scaffold support member, in other words, the interval between the support column and the scaffold member can be set and changed by the angle setting member. That is, since the worker's standing position and the distance between the hands can be set and changed to a desired position by the angle setting member, the work efficiency can be further improved.

  The angle setting member is supported by being interposed between the support column and the scaffold support material, and supports the scaffold support material with the support column as a fulcrum.

  In this configuration, since the scaffolding support member is supported at a desired angle with the support as a fulcrum, the angle of the scaffolding support member can be easily set without using an angle setting wire rope or the like on the slope or the like. That is, the operator's standing position can be set with the suspension scaffold alone.

  Moreover, the structure by which the said scaffold material is connected with the upper and lower multistage with respect to the said scaffold support material may be sufficient.

  In this configuration, since the scaffolding material is provided in a plurality of upper and lower stages, the workability in the height direction of the suspended scaffolding is improved, and the scaffolding can be secured independently, so that the worker can also work up and down. Moreover, the bending rigidity and torsional rigidity of the entire suspended scaffold can be increased.

The present invention is also a method for installing a suspended scaffold on a slope,
A plurality of struts are erected at intervals in the slope width direction, and a scaffold material is extended in the slope width direction to deploy a suspended scaffold on the slope, and the scaffold material is further extended from the top of the pillar. How to install a suspended scaffolding.

  According to this method, when the suspension scaffold is installed on the slope, the scaffold is secured by suspending the scaffold material from the columns provided at intervals in the slope width direction. Therefore, the worker can work on a scaffold supported in the air by a plurality of support columns. In addition, since the operator's hand is closer to the worker's standing position toward the upper part (high place) of the column, the worker can perform work near the column upper part without taking an unreasonable posture. In particular, when constructing a fallen object protection apparatus having a column inclined forward of the slope, the work can always be directed to the slope mountain side, so that the work of lifting the protective body can be performed efficiently. In addition, since it is only necessary to suspend the scaffolding material from the upper part of the support column, it is advantageous in terms of maintenance, such as installation, dismantling, and restoration, and cost.

In addition, the scaffold support material for connecting the scaffold material and the upper portion of the support column is connected to the upper portion of the support column before the support column is stood up,
Furthermore, the scaffold support material is suspended from the upper part of the support as the support is raised.

  In this method, the support is stood in a state in which a scaffold support member for connecting the support and the scaffold is assembled in advance on the upper part of the support. For this reason, since the scaffold support member is suspended from the upper part of the support column at the same time when the support column is stood up, the assembly work of the scaffold support material that should originally be performed on the support column can be completed on the ground.

  In addition, the scaffolding material is suspended when a falling object protection device is installed on the slope, which has a plurality of pillars spaced apart in the slope width direction, and deploys and supports the protection body of the fallen object in the slope width direction by the pillars. The falling object protective device support is used as a support for the falling object.

  In this method, when constructing the fallen object protection apparatus, the scaffolding material is suspended below the slope by using the column used for the fallen object protection apparatus. For this reason, it is possible to install a suspension scaffold without providing a separate support for the suspension scaffold.

  In addition, the position of the scaffold is set and changed using the support as a fulcrum.

  In this method, since the position of the scaffolding is changed using the support as a fulcrum, the position of the scaffolding can be easily changed without separately attaching an angle setting wire rope or the like to the slope or the like. That is, the operator's standing position can be set with the suspension scaffold alone.

  As described above, according to the present invention, a scaffold with good workability on a slope can be secured with a simple structure. Moreover, the installation method can be provided. In particular, if the present invention is applied to the construction of a fallen object protection device, it is possible to easily lay a protective net at the height of the column, and to shorten the work period and cost from the installation to the removal of the suspension scaffold. .

The schematic block diagram of the suspension scaffold shown to this Embodiment. The side view of the suspension scaffold which concerns on FIG. The principal part enlarged view which shows the connection state of a support | pillar and a scaffold support material. Enlarged view of the stopper to prevent dropout. The principal part enlarged view which shows the connection state of a scaffold support material and a scaffold material. The front view of the rock fall protection fence which concerns on this Embodiment. The top view of the rockfall protection fence which concerns on this Embodiment. The side view of the support | pillar applied to the rock fall protection fence of FIG. The perspective view which shows the conventional fallen object protection apparatus (fall rock protection fence).

Hereinafter, an embodiment in which the suspension scaffold according to the present invention is applied to construction of a rockfall protection fence will be described.
First, prior to the description of the suspension scaffold, a general structure of a rockfall protection fence and an example of its construction will be described.
As shown in FIGS. 6 to 8, the rock fall protection fence 50 has a plurality of columns 51, 51 erected at intervals in the slope width direction (left-right direction) and attracts each column 51, 51 to the slope mountain side. A supporting rope 58 (see FIG. 8) for fixing, a stay rope 59 (see FIG. 1) for attracting and fixing each supporting column 51, 51 to the sloped valley side, and a vertical direction with respect to the supporting column 51. The strut reinforcement rope 53 to be routed, the upper lateral rope 54 and the lower lateral rope 55 that are supported by the respective struts 51 and extend in the slope width direction, and the high tension protection provided between the upper lateral rope 54 and the lower lateral rope 55. And a net (hereinafter referred to as a protective net 56).

The support column 51 is made of a thick steel pipe, and a flange 57 (see FIG. 8) for connecting the support column to a concrete foundation (base plate) provided on an inclined surface is provided at the base portion.
In addition, brackets 52 and 52 for securing various ropes are provided at two positions above and below the column 51. Further, each bracket 52, 52 is welded to the column 51 so as to face the slope mountain side with the column 51 standing.
Further, as shown in FIG. 8, U-shaped bolts 53 c and 53 d for connecting the column reinforcing rope 53 are assembled to the mountain side tip portions of the brackets 52 and 52, and both the brackets 52 and 52 are mutually connected by the column reinforcing rope 53. It is connected to.

  Further, the upper lateral ropes 54 and the lower lateral ropes 55 are routed so as to pass the loops of the eye-processed portions (ring-shaped end portions 53a, 53b) of the column reinforcing ropes 53 assembled to the brackets 52, 52. That is, the upper horizontal rope 54 and the lower horizontal rope 55 are routed in the slope width direction on the mountain side of the support column 51 without being restrained by the brackets 52, 52.

  In addition, a U-shaped bolt 58a (see FIG. 8) for connecting a support strut rope is provided on the upper portion of the support 51. One end of the support strut rope 58 is connected to the U-bolt 58a, and the other end is connected to the slope mountain side. It is attached to. Further, an upper chord rope 60 (see FIG. 7) that connects the upper portions of the adjacent columns 51 and 51 is stretched between the upper brackets 52 a and 52 a of the columns 51.

  The protective net 56 is laid between the lower horizontal rope 55 and the upper horizontal rope 54 that are routed on the mountain side of the column 51. Specifically, the upper edge of the protective mesh 56 is raised from the lower part of the support and hooked on the upper horizontal rope 54, and the upper edge of the protective mesh 56 is folded back so as to embrace the upper horizontal rope 54 and fixed by the coupling coil 61. To do. Moreover, the same edge part process is performed also in the lower horizontal rope 55 side.

  In addition, the installation work of these protection net | networks 56 and a part of wiring work in the upper part of a support | pillar are performed using the suspension scaffold which concerns on this invention. Hereinafter, the structure and installation method of the suspension scaffold according to the present invention will be described.

  As shown in FIGS. 1 and 2, the suspension scaffold 1 includes a scaffold member 2 that extends in the slope width direction, a scaffold support member 3 that suspends the scaffold member 2 from an upper part of a support of the rockfall protection fence 50, and a scaffold support member. And an angle setting turnbuckle 4 for setting the angle 3.

  If it demonstrates from the scaffold support material 3, the scaffold support material 3 is a little longer than the support | pillar 51, and is manufactured by processing the general purpose single pipe of (phi) 48,6. Further, as shown in FIG. 3, a circular plate 3a is welded to the upper opening end in a state of standing with respect to the upper opening end. The plate 3a has a pin hole 3b for holding a hanging tool C such as a shackle or a hook.

  In addition, a round bar 5a is welded to an intermediate portion (see FIG. 5) in the longitudinal direction of the scaffold support member 3 in two upper and lower stages. This round bar 5a is used as a stopper 5 for preventing the scaffold 2 from falling off, and is provided so as to penetrate from the slope valley side to the slope mountain side in a state where the scaffold support material 3 is suspended from the upper part of the column as shown in FIG. Yes. Further, a turnbuckle stay 3 d for assembling the angle setting turnbuckle 4 is welded above the dropout prevention stopper 5.

  The scaffolding material 2 is composed of a general-purpose single pipe as with the scaffolding support material 3. Specifically, it consists of a single pipe of φ48, 6, and is fastened to the scaffold support 3 using an orthogonal clamp, a universal clamp or the like (hereinafter simply referred to as clamp 6). In addition, the length of the scaffold support material 3 is selected based on the standing span (distance between the columns) of the column 51.

  The angle setting turnbuckle 4 is a member that is interposed and supported between the support column 51 and the scaffold support member 3 in a state in which the scaffold support member 3 is suspended from the upper part of the support column. A general-purpose turnbuckle having clevis joints 4a and 4b is used. In addition, one end of the angle setting turnbuckle 4 configured in this way is connected to the turnbuckle stay 3d of the scaffold support member 3, and the other end is a column side welded in advance to an intermediate portion of the column 51. It is connected to a turnbuckle stay 51a (see FIG. 8).

Then, the installation method of the suspension scaffold 1 which has the said structure is demonstrated.
First, the outline of the installation work will be described. The installation work of the suspension scaffold 1 is performed together with the upright work of the support column 51. Specifically, after the scaffold support member 3 and the angle setting turnbuckle 4 are assembled to the support column 51, the scaffold support material 3 is suspended from the upper part of the support column 51 as the support column 51 is started up. After assembling the scaffolding material 2 to the suspended scaffolding support material 3, the angle setting turnbuckle 4 is tightened to adjust the position of the scaffolding material 2.

Hereinafter, each process will be described in detail.
The work of assembling the scaffold support material 3 to the support column 51 is performed before the support column 51 is started up as described above. Specifically, the upper end portion of the scaffold support member 3 is connected to the upper portion of the support column 51 by using a hanging tool C (shackle). In addition, the upper bracket 52a of the support column 51 is provided with a locking part 52d for the lifting tool so as to protrude from the sloped valley side so as to correspond to the lifting tool C. Note that. In FIG. 3, the semicircular ring-shaped member provided on the upper part of the support column becomes the locking part 52 d of the lifting tool.

  Subsequently, the angle setting turnbuckle 4 is assembled between the support column 51 and the scaffold support 3. In the present embodiment, as described above, the angle setting turnbuckle 4 is assembled between the turnbuckle stay 51a on the support column 51 side and the turnbuckle stay 3d on the scaffold support member 3 side. The angle setting turnbuckle 4 may be assembled in advance to either the scaffolding support member 3 or the column 51 prior to the suspension of the scaffolding support member 3. Further, the size of the turnbuckle used for the angle setting turnbuckle 4 is selected with a margin while taking into consideration the installation angle of the column 51 and the lengths of the column 51 and the scaffold support 3.

  And the support | pillar 51 is raised in the state which assembled | attached the scaffold support material 3 and the angle setting turnbuckle 4, and the support | pillar 51 is made to stand on a slope. Also, these operations are performed individually for each column 51.

  Subsequently, the upper chord rope 60 is routed so as to connect the upper portions of the respective columns 51, and a pulley is assembled to the upper chord rope 60. Further, the master rope is pulled down from the pulley, and the operator hangs up, and prepares for the subsequent assembly work of the scaffolding material 2 and the adjustment work of the angle setting turnbuckle 4.

  In addition, when the assembly work of the scaffold 2 and the adjustment work of the angle setting turnbuckle 4 can be performed on the ground side, they are performed on the ground side. In addition, when the hand cannot reach, the worker works in a suspended state as described above. Since the hanging work is performed on the axis of the scaffolding support member 3, the operator can work using the dropout prevention stopper 5 provided on the scaffolding support member 3 as a foothold. Will be used as a scaffold.

Subsequently, the assembly work of the scaffolding material 2 is performed.
In this embodiment, since a general-purpose single pipe is used as the scaffold member 2 and the scaffold support member 3, the clamp 6 for the single pipe is used for the connection between the scaffold member 2 and the scaffold support member 3 as described above. To do.

  Further, the assembly position of the scaffold member 2 is directly above the drop-off prevention stopper 5 provided at the center portion of the scaffold support member 3, and in this embodiment, directly above the drop-off prevention stoppers 5 provided at the two upper and lower positions. Assemble each scaffold material 2.

  Moreover, when connecting the scaffolding material 2 and the scaffolding support material 3, the clamp stop position is adjusted so that the scaffolding material 2 is as horizontal as possible. In addition, when the scaffold 2 is assembled, in the present embodiment, the upper scaffold 2 (2a) is extended to the left side with respect to the nearest scaffold support 3 (A in FIG. 1) as shown in FIG. The lower scaffolding material 2 (2b) extends to the right side with respect to the scaffolding support material 3. That is, the scaffold is unfolded by extending the scaffold 2 in the left and right directions with respect to the scaffold support 3 (A). These operations are performed on both of the adjacent scaffold supporting members 3, and after the fastening operation of each part is completed, a substantially horizontal scaffold over two upper and lower stages is secured as shown in FIG.

Subsequently, the angle setting turnbuckle 4 is adjusted so that the scaffold 2 and the operator's hand have an appropriate positional relationship. That is, the angle (see θ in FIG. 2) formed between the support column 51 and the scaffold support member 3 is set to a desired angle by tightening the angle setting turnbuckle 4, thereby changing the standing position of the operator.
The angle setting turnbuckle 4 functions as a reinforcing member for the suspension scaffold in addition to the adjustment of the standing position. That is, by connecting the support column 51 fixed to the slope and the scaffold support member 3 with the angle setting turnbuckle 4, the scaffold member 2 can be prevented from swinging back and forth and left and right, and a very stable scaffold can be obtained.
Then, the worker M gets on the suspension scaffold 1 installed in this way (see FIG. 1), and the protective net 56 is lifted from the lower part of the support column 51 and is tied to the uppermost horizontal rope 54 at the upper part of the support column. .
1 and 2, the various ropes connected to the column 51 are omitted from the imaginary lines or the illustration thereof for the convenience of illustration mainly of the suspension scaffold 1.

As described above, according to the present embodiment, since the work is performed while standing on the scaffolding material 2 suspended from the upper part of the support column, the right-angle inclined support column applied to the falling rock protection fence and the pocket type rock fall protection projecting forward of the slope A stable scaffold can be secured on the trough side of the strut of the net strut. In addition, since the operator's hand approaches the worker's standing position toward the upper part of the support column 51, workability is also good in this respect.
Moreover, since the scaffold 2 is simply suspended from the upper part of the column 51, installation, dismantling, and recovery from a disaster are easy. Furthermore, the construction period can be shortened and various costs can be reduced throughout the construction of the rockfall protection fence from the installation of the suspension scaffold 1 to the dismantling and removal.

The above-described embodiment is merely an example, and details thereof can be changed according to various specifications.
For example, in the present embodiment, the scaffolding material 2 and the scaffolding support material 3 are constituted by general-purpose single pipes of φ48, 6 from the viewpoint of cost and ease of handling, but even if a thicker pipe with higher strength is used. Good. Moreover, you may manufacture a suspension scaffold not only using a single pipe pipe but using another raw material and a structural material. That is, as a preferable form of the scaffolding material 2 and the scaffolding support material 3, it is sufficient if rigidity capable of maintaining the initial shape is ensured before and after the suspension.

  In the present embodiment, the angle setting turnbuckle 4 is assembled between the support column 51 and the scaffold support member 3 and the position of the scaffold support member 3 is adjusted with the support column 51 as a fulcrum. Instead of the turnbuckle 4, the column 51 and the scaffold support 3 may be connected using a single pipe and a universal clamp. In this case, it is preferable to weld the connection plate or the like accompanying the connection between the single pipe and the support on the support 51 side or the single pipe side.

  Moreover, in this Embodiment, although the round bar is welded as the drop-off prevention stopper 5, it may replace with a round bar and may weld a gusset plate. Moreover, the number of stages is not limited to the upper and lower stages, and the number of stages may be increased according to the number of workers.

  In the present embodiment, the angle of the scaffold support member 3 is set with the column 51 as a fulcrum. However, the scaffold support member 3 or the scaffold member 2 may be directly attached to the slope with a wire rope or the like. . Further, in this embodiment, the turnbuckle is used so that the length can be adjusted, but instead of the turnbuckle, a rod-like member having a different length may be replaced to adjust the standing position of the operator. Moreover, it can replace with a turnbuckle, and can also bring a scaffold support material to the support | pillar side with a clamp.

  Moreover, it may replace with the scaffolding material 2 which consists of a single pipe pipe, and may comprise a scaffolding material with a wire rope. In this case, since the wire rope bends, it is preferable to apply tension with a fastener or the like. In addition, the wire rope is flexible and unstable compared to a single pipe, but by hanging from the top of the column, the operator's standing position is always on the sloped valley side. Therefore, improvement in workability can be expected in this respect. Moreover, it can replace with the scaffold support material 3 and can use ropes, such as a wire rope and a chain.

DESCRIPTION OF SYMBOLS 1 Suspended scaffold 2 Scaffold material 3 Scaffold support material 3a Plate 3b Pin hole 3d Turn buckle stay 4 Angle setting turn buckle 4a Clevis joint 4b Clevis joint 5 Fall-off prevention stopper 5a Round bar 6 Clamp 50 Falling stone protection fence (falling object protection device )
51 Column 51a Column-side turnbuckle stay 52 Bracket 52d Locking portion 52a Upper bracket 53 Column reinforcement rope 53a Ring-shaped end 53b Ring-shaped end 53c U-shaped bolt 53d U-shaped bolt 54 Upper horizontal rope (top horizontal rope)
55 Lower horizontal rope 56 Protective net 57 Flange 58 Strut retainer rope 58a U-bolt 59 Stay rope 60 Upper string rope 61 Coupling coil

Claims (4)

A method for installing a suspension scaffold on a slope,
A plurality of struts are erected at intervals in the slope width direction, and a scaffold material is extended in the slope width direction to deploy a suspended scaffold on the slope, and the scaffold material is further extended from the top of the pillar. How to install a suspended scaffolding. Prior to the standing of the support pillar, the scaffold support material for connecting the scaffold material and the upper part of the support pillar is connected to the upper part of the support pillar,
The suspension scaffold installation method according to claim 1 , wherein the scaffold support member is suspended from an upper portion of the column as the column is stood up. In order to suspend the scaffolding material when installing a fall object protection device on a slope with a plurality of pillars spaced apart in the slope width direction and deploying and supporting a fall object protection body in the slope width direction by the pillars The suspension scaffold installation method according to claim 1 or 2 , wherein a support for the falling object protection device is used as the support. The method for installing a suspended scaffold according to any one of claims 1 to 3 , wherein the position of the scaffold is changed by setting the column as a fulcrum.

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