JP2607384B2 - Scaffold assembly and disassembly methods - Google Patents

Description

The present invention relates to an improvement in a method of assembling and disassembling a framed scaffold used for high-altitude work associated with construction and repair of buildings and other structures, and relates to a method for improving safety. It is intended to improve workability and workability.

[Related Art] In structures such as buildings, ships, power plants, tanks, chimneys, and bridges, it is often necessary to construct a working scaffold along an outer wall or the like for construction or supplementary training. .

Conventionally, such a scaffold was constructed by erection of a gate-shaped scaffold frame (building) on the ground, reinforcing these with diagonal materials (crossing braces), and mounting an upper plate (cloth) on the upper part. The loading is repeated in the horizontal and upward directions to build up to a predetermined height. At the time of assembling, the working position gradually increases, while at the time of disassembly, the work must be sequentially dismantled from the top, There is a danger of working at heights such as unloading, and there is a high possibility that a crash will occur.

Therefore, a construction method has been proposed in which these scaffold frames can be assembled and dismantled on the ground, and they are considered to be connected to the lower side while being lifted using a crane or the like, or to be dismantled from the lower side.

[Problems to be Solved by the Invention] However, when assembling or disassembling while lifting, each scaffold frame must be vertically connected or disconnected in a swinging state, and in particular, a plurality of scaffolds are required. When trying to improve the efficiency of assembling and dismantling by arranging the frames in the horizontal direction, many connecting parts must be connected at once, and there is a problem that it becomes more difficult work in a shaking state .

Also, if many connecting parts are to be connected at once, the lifting operation for positioning with a crane or the like becomes very complicated and takes time, and in actual work,
There is a problem that work efficiency of assembling and disassembling the scaffold frame has not been improved.

Furthermore, when a crane is used, there is a problem that a crane installation space and an operation space are required in addition to the scaffold installation space.

The present invention has been made in view of the problems of the related art, and it is possible to easily assemble or disassemble safely and in a short time while preventing shaking, and to provide a scaffold that does not require a crane installation space or the like. It is intended to provide an assembling method and a disassembling method.

[Means for Solving the Problems] In order to solve the above problems, the scaffold assembling method according to the present invention includes a scaffold frame that is framed from the top of a structure on which the scaffold is installed, in accordance with the planar shape of the scaffold frame to be assembled. While suspending a frame provided with a plurality of hoisting devices for lifting and provided with a telescopic connecting member capable of vertically connecting a scaffold frame to a lower surface, a scaffold of each step is provided between above the structure and the ground. After stretching the guide wire for preventing the frame from overturning, assemble the scaffold frame of the previous stage on the ground and slidably connect it to the guide wire, via the hoisting device mounted on the frame with the scaffold frame of the preceding stage. And lift it above the height of the first scaffold frame, then assemble the next scaffold frame on the ground and slidably connect it to the guide wire, lower the previous scaffold frame along the guide wire, Step feet After fitting and telescopically connecting the telescopic connecting members of the connecting portion of the field frame, repeating the step of lowering the scaffold frame at the preceding stage and making the final connection is repeated.

Further, the scaffold disassembly method of the present invention includes a plurality of windings for lifting a scaffold frame that is framed in accordance with the planar shape of the scaffold frame to be dismantled from a structure above the scaffold to which the plurality of scaffold frames are connected. While suspending the frame provided with the upper device and provided with a telescopic connecting member capable of vertically connecting the scaffold frame to the lower surface, the guide wire for preventing the overturn of the scaffold frame of each step is slidable. After being stretched between the structure and the ground, the connection between the lower scaffold frame and the upper scaffold frame is released, and then the entire scaffold above the disconnected portion is mounted on the frame. The apparatus is characterized in that the lower scaffold frame and the guide wire are disconnected from each other by being lifted via the device, and the lower scaffold frame is repeatedly dismantled.

[Operation] According to such a method of assembling a scaffold, scaffold frames of respective steps are assembled on the ground, and are hoisted by a hoisting device via a frame suspended from the top of the structure.
Each stage scaffold frame is slidably connected to a guide wire stretched in advance between the top of the scaffold and the ground, so that work can be performed only in the installation space of the scaffold while preventing shaking with the guide wire. I can do it.

When connecting the scaffolding frame of the next stage, a telescopic connection member is used, and by temporarily expanding and contracting this portion, temporary connection can be easily performed even if there is an error in the vertical or horizontal alignment. In addition, after the temporary connection, the actual connection is performed to simplify the lifting operation, thereby improving the efficiency of the assembling work.

Further, according to this scaffold disassembly method, the scaffold frames of each step are slidably connected to a guide wire stretched between the uppermost portion of the scaffold and the ground so that the structure is prevented from shaking. It is designed to be dismantled on the ground while being lifted through a frame suspended from above, so that it can be safely and efficiently dismantled using only the installation space for the scaffold.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 to FIG. 3 are explanatory views of each step according to an embodiment of the method of assembling and disassembling the scaffold according to the present invention. FIG. 1 to FIG. 1 to FIG. 1 show the disassembly process.

(A) First, a method of assembling a scaffold will be described in a case where the scaffold is constructed outside an existing building.

(1) As preparation before the assembly work, as shown in FIG.
A sheave support member 3,3 having a sheave 3a at a tip and a wire support member 5,5 for a guide wire 4 are attached to a parapet 2 portion of the building 1, and a scaffold for assembling the sheave support member 3,3 in the width direction is attached. Placed in the middle, the wire support member 5,
5 is arranged so as to be located slightly outside in the width direction of the scaffold to be assembled, and the front ends of the support members 3 and 5 project out of the parapet 2 of the building 1.

On the other hand, a lifting frame 6 framed in accordance with the planar shape of the scaffold to be assembled is prepared.

The frame 6 is provided with the same telescopic connecting member 8 as the connecting portion 7a of the scaffolding frames 7 in accordance with the arrangement of the scaffolding frames 7. As shown in FIG. 4, the structure of the telescopic connecting member 8 is such that linear upper and lower grooves 8a are formed in the axial direction of the connecting member 8, and circular fixing grooves are formed at both ends thereof so as to protrude in the circumferential direction. A connecting cylinder having the same configuration as the outer cylinder of the connecting portion 7a of the scaffolding frame 7 in which the upper and lower grooves 8a and the fixing pins 8c movable in the fixing grooves 8b protrude from the frame 6 are formed.
It is fixed through 6a.

Therefore, as shown in FIG. 5, by rotating the connecting member 8 in the connecting cylinder 6a of the frame 6, the upper and lower grooves 8a and the fixing grooves 8a are fixed.
8b, and can also be moved up and down in the vertical groove 8a so that the expansion and contraction of the connecting member 8 and the adjustment of the amount of protrusion by the two fixing grooves 8b can be performed. Has become.

And such a frame 6 is provided with a sheave support member 3,
3 is suspended via a suspending wire 9 wound around the sheave 3a. One end of the suspending wire 9 is passed through a winder 10 as a hoisting device mounted on a frame 6 for lifting a scaffold. Connected to the wire take-up reel 11,
The other end is fixed to the frame 6, and the hanging wire 9 is wound up or rewound by the winder 10.
The frame 6 can be moved up and down.

Further, the upper end of the guide wire 4 whose lower end is fixed to the jack plate 12 on the ground via the wire supporting members 5, 5 is fixed to the roof of the building 1, and is stretched by applying a certain amount of tension. In addition to the state, the frame 6 is slidable with the frame 6 to prevent the frame 6 from swinging.

(2) After the preparation is completed, as shown in FIG. 1, the scaffold frame 7 is erected on the jack plate 12 installed on the ground, reinforced with the diagonal members 13, and the upper plate 14 is placed thereon. The first-stage scaffold frame 7 is constructed.

In the upper part of the scaffold frame 7, a through hole 7c for a connecting pin 8d is formed in a part of an outer cylinder 7b constituting a connecting part 7a for connecting with the telescopic connecting member 8, and in the lower part, a telescopic type is provided. A connecting member 8 is provided.

Then, wire guides 15 are provided on both sides of the first-stage scaffold frame 7.
Is attached so that the scaffold frame 7 can slide along the guide wire 4 to prevent swinging during lifting.

(3) Thereafter, the frame 6 is lowered by operating the winder 10, and is connected to the first-stage scaffold frame 7 by the telescopic connecting member 8.

As shown in FIG. 5, the connecting operation is performed by first connecting the extendable connecting member 8 of the frame 6 with the fixing pin 8c to the lower fixing groove 8b.
To a state in which a slight gap (a gap smaller than the expansion allowance (length of the upper and lower grooves 8a) of the extendable connecting member 8) from the ground scaffolding frame 7 is opened. Descend.

In this state, the telescopic connecting member 8 is rotated, and the fixing pin 8c is inserted into the upper fixing groove 8b from the lower fixing groove 8b via the upper and lower grooves 8a.
And insert it into the outer cylinder 7b of the scaffolding frame 7,
A temporary connection state is set.

After all the connecting portions 6a, 7a are in the temporarily connected state, the frame 6 is further lowered to completely insert the telescopic connecting member 8 into the outer cylinder 7b of the scaffolding frame 7, and the connection pin 8d is inserted into the through hole 7c.
And fix it completely.

By separately connecting such a temporary connection and a permanent connection, the connection portion 6 can be formed only by lowering the frame 6 by the winder 10.
There is no need to precisely adjust the position so that the insertion of the a and 7a can be performed, and only the upper and lower positions need to be adjusted within the range of the expansion and contraction allowance of the telescopic connecting member 8, and the left and right sway is prevented by the guide wire 4. Therefore, many connecting portions 7a can be easily connected.

(4) Next, as shown in FIG. 2, the scaffolding frame 7 permanently connected to the frame 6 is held in a state of being lifted to a position higher than the one-stage scaffolding frame 7, and is again held on the jack plate 12 on the ground. The next stage (second stage) of the scaffolding frame 7 is assembled.

After the assembly is completed, the wire guide 15 is attached so that the scaffolding frame 7 can be moved up and down along the guide wire 4, and the scaffolding frame 7 suspended on the frame 6 is lowered.
Connect 7 In this case, as in the case of the connection between the frame 6 and the scaffolding frame 7, the temporary connection and the permanent connection are performed separately to facilitate the alignment.

(5) Thus, as shown in FIG. 3, after assembling the third-stage scaffold frame 7 on the ground and assembling and lifting, the required number of steps of the scaffold frame 7 are connected to the lower side of the frame 6, and
Place on jack plate 12.

Then, a wall tether is provided at a necessary place and connected to the building 1 to complete the construction of the scaffold.

Further, the lifting wire 9 or the guide wire 4 may be removed as necessary, but may be left as it is for prevention of overturning and dismantling work.

Further, when it is necessary to provide an entrance to the building 1, for example, a part of the scaffolding frame 7 may be formed in a suspended state or after being completely lowered and then removed, or the entire scaffold may be in a suspended state. If you leave it installed,
It is formed so as to be fixed to the building 1 or the like without providing the lowermost scaffold frame.

(B) The method of dismantling the scaffold is performed according to the steps reverse to those in the case of assembling, and therefore detailed description is omitted.

Also in this disassembly, the frame 6 is installed and the guide wire 4 and the wire guide 15 are used to prevent shaking.

Moreover, since the telescopic connecting members 8 are used for the connecting portions 7a of the scaffold frames 7 and 7 and the connecting portions 6a and 7a of the scaffold frame 7 and the frame 6, disassembly can be easily performed.

According to the method of assembling and disassembling the scaffold, most of the work can be performed on the ground, and dangerous work at a high place is eliminated, and the safety of the work is improved.

In addition, since the work is performed on the ground, work efficiency is improved.

Furthermore, the conventional scaffold frame can be easily used simply by attaching the telescopic connecting member, and the change can be suppressed as much as possible. In addition, since the frame on which the hoisting device is mounted is suspended from the top of the structure and placed above where the scaffold should be installed, the scaffold can be easily assembled or disassembled if there is space for installing the scaffold. .

The extendable connecting member for connection is not limited to the one shown in the figure, but may be any structure as long as it can expand and contract and can be fixed.

Furthermore, the number of guide wires is not limited to two, and may be appropriately selected depending on the construction height of the scaffold, weather conditions, and the like.

Similarly, the number of hoisting devices to be installed may be appropriately selected according to the lifting load and the like.

Further, the assembling and disassembly may not be performed one by one, but may be performed in a plurality of stages.

[Effects of the Invention] As described above in detail with one embodiment, according to the method of assembling a scaffold of the present invention, scaffold frames of each step are assembled on the ground and suspended from the top of the structure. The hoist was lifted by a hoisting device via a frame, and the scaffold frames of each stage were slidably connected to a guide wire stretched in advance between the top of the scaffold and the ground. Work can be done only in the installation space of the scaffold while preventing shaking, and all work can be performed on the ground, which is safe.

When connecting the scaffolding frame of the next stage, a telescopic connection member is used, and by temporarily expanding and contracting this portion, temporary connection can be easily performed even if there is an error in the vertical or horizontal alignment. In addition, the main connection is performed after the temporary connection, so that the lifting operation can be simplified, and the efficiency of the assembling operation can be improved.

Further, according to the scaffold disassembly method of the present invention, the scaffold frames of each step are slidably connected to the guide wire extending between the uppermost portion of the scaffold and the ground, thereby preventing shaking. In this state, the dismantling work can be performed on the ground while being lifted through the frame suspended from above the structure, and the dismantling can be performed safely and efficiently with only the installation space of the scaffold.

[Brief description of the drawings]

FIG. 1 to FIG. 3 are explanatory views of each step according to an embodiment of the method of assembling and disassembling the scaffold according to the present invention. FIG. 1 to FIG. 1 to FIG. 1 show the disassembly process. FIG. 4 is a cross-sectional view in which a connecting portion is extracted, and FIG. 5 is an explanatory diagram of a connecting method. 1: Building, 2: Parapet, 3: Sheave support member, 4: Guide wire, 5: Wire support member, 6: Frame, 7: Scaffolding frame (built), 8: Telescopic connecting member, Hanging wire, 10 : Winder (winding device), 11: winding reel, 12: jack plate,
13: Diagonal material (crossed braid), 14: Upper plate (cloth), 15: Wire guide.

Claims (2)

(57) [Claims] 1. A plurality of hoisting devices which are framed from the top of a structure on which a scaffold is to be installed and which lift the scaffold frame and which are framed in accordance with the planar shape of the scaffold frame to be assembled, are mounted on the lower surface of the scaffold frame. While suspending a frame provided with an extendable connecting member that can be connected, a guide wire for preventing a fall of a scaffold frame of each stage is stretched between above the structure and the ground, and then, a scaffold of a front stage on the ground is provided. Assemble the frame and slidably connect it to the guide wire, lift the previous scaffold frame above the height of the first scaffold frame via the hoisting device mounted on the frame, and then move the next scaffold frame Assembled on the ground, slidably connected to a guide wire, lowered the previous scaffold frame along the guide wire, and fitted the telescopic connection member of the connection portion of the previous or next scaffold frame to temporarily After connecting, Method of assembling a scaffold, characterized in that to repeat that this connection by lowering the scaffolding frame. 2. A plurality of hoisting devices, which are framed in accordance with the planar shape of the scaffold frame to be dismantled from the structure above the scaffold to which a plurality of stages of scaffold frames are connected, and lift the scaffold frame, While suspending a frame provided with a telescopic connecting member capable of vertically connecting a scaffold frame to a lower surface, a guide wire for preventing a fall in which each stage scaffold frame is slidable is provided between the structure above the scaffold and the ground. After being stretched in between, the connection between the lower scaffolding frame and the upper scaffolding frame is released, and then the entire scaffold above the part where the connection is released is lifted through a hoisting device mounted on the frame, and the lower scaffolding frame is lifted. Disconnecting the connection between the scaffold frame and the guide wire and disassembling the lower scaffold frame.