JP7773229B2 - Building demolition and curing equipment - Google Patents

Description

The present invention relates to a building demolition and curing device for curing the roof of a building when it is demolished.

One conventional method for demolishing buildings made of reinforced concrete or other materials involves lifting a demolition machine (backhoe) onto the roof with a crane, then demolishing each floor, starting from the upper floors (the floor-up demolition method). With this method, dust generated during the demolition work can fly from the top of the building into the surrounding area. Furthermore, with this method, there are rare cases where small pieces of concrete or rebar fragments fly from the top of the building into the surrounding area, causing accidents.

In typical demolition work, the building to be demolished is surrounded by temporary scaffolding, and soundproofing panels and sheets are attached to the scaffolding to reduce the noise impact and dust dispersion caused by the demolition work. In addition, when installing roof protection, a scatter prevention net (hereinafter referred to as protection net) is hung across the top of opposing temporary scaffolding to cover the entire upper part of the building.

However, particularly for large buildings, the longer the span length of the scatter prevention netting, the greater the sagging of the netting, making it impossible to ensure sufficient height from the roof to the netting in the center of the building. As a result, there is less space available for demolition machinery to work on the building, making it difficult to work.

In response to this, a construction method has been developed in which multiple horizontal truss members with a truss structure that has low deflection are installed between opposing scaffolding, and protective netting is placed on top of these horizontal truss members to cover the entire upper part of the building (see, for example, Patent Document 1).

Patent No. 6879613

However, with the construction method described in Patent Document 1, the horizontal truss members must be installed at a high altitude to ensure a working space above the building for demolition machinery to carry out demolition work. This requires temporary scaffolding to be installed at a height of five to six steps above the top of the building, which means that installing the horizontal truss members at a high altitude requires the work to be done using temporary scaffolding at a high altitude, which poses a significant challenge.

Normally, to stabilize temporary scaffolding against the wind loads it receives, the scaffolding is secured to the building by connecting it to the building with connecting members called wall ties. In this case, since the wall ties cannot be installed at the top of the temporary scaffolding, which is installed higher than the building, there is a problem that the top of the temporary scaffolding becomes very unstable in strong winds. In addition, because the vibrations caused by demolition machinery can cause the temporary scaffolding to shake significantly, work using the demolition machinery may have to be temporarily suspended to carry out the demolition work, resulting in reduced work efficiency.

Furthermore, as the demolition of a building progresses, the horizontal truss members must be lowered while maintaining their horizontal position. This requires one worker to be stationed at each of the four corners of the truss structure, including the horizontal truss members, and each worker must coordinate their time to lower the truss structure, significantly reducing workability.

The present invention was developed in consideration of the above problems, and aims to provide a building demolition and curing device that can easily attach and remove frame materials and curing nets, significantly improving the efficiency of demolition work.

To achieve this goal, the invention described in claim 1 comprises temporary scaffolding set up along the outer wall of a building to be demolished; multiple rod-shaped framework members stretched between opposing sets of temporary scaffolding, each divided lengthwise, with their base ends rotatably attached to the temporary scaffolding; and protective netting stretched across the framework members; and by rotating the framework members upward, a demolition work space is formed below the framework members over which the protective netting is stretched.

The invention described in claim 2 is characterized in that, in addition to the configuration described in claim 1, the multiple frame members are formed to curve upward.

Furthermore, the invention described in claim 3 is characterized in that, in addition to the configuration described in claim 1, the multiple frame members are each divided in the lengthwise direction and configured to be extendable and contractible.

The invention described in claim 4 is characterized in that, in addition to the configuration described in claim 3, the divided tip portions of the multiple frame members are connected by connecting members.

The invention described in claim 5 is characterized in that, in addition to the configuration described in claim 1, the multiple frame members are each made of flexible reinforced plastic.

Furthermore, the invention described in claim 6 is characterized in that, in addition to the configuration described in claim 1, the protective net is provided with multiple rings at predetermined intervals, and the protective net is tensioned by inserting the framework members through these rings.

Furthermore, the invention described in claim 7, in addition to the configuration described in claim 1, has the base ends of the multiple frame members rotatably attached via fastening fittings provided on the temporary scaffolding, and the temporary scaffolding is provided with an angle adjustment device that adjusts the rotation angle of the frame members.

According to the invention described in claim 1, multiple framework members are strung across temporary scaffolding, each formed into a rod-like shape and divided lengthwise, with the base end of each member rotatably attached to the temporary scaffolding, and protective netting is stretched across the multiple framework members. By rotating the multiple framework members upward, a demolition work space is formed below the multiple framework members over which the protective netting is stretched. This allows the framework members and protective netting to be easily attached and removed, significantly improving the efficiency of demolition work.

Furthermore, according to the invention described in claim 2, the multiple frame members are formed to curve upward, making it possible to secure more sufficient space for dismantling work.

Furthermore, according to the invention described in claim 3, the multiple frame members are each configured to be split lengthwise and extendable, so that by shortening the split frame members during transportation, handling is improved and the frame members can be easily attached to and removed from the temporary scaffolding.

Furthermore, according to the invention described in claim 4, the divided ends of the multiple frame members are connected by connecting members, making it easy to attach and remove the frame members and protective netting.

Furthermore, according to the invention described in claim 5, each of the multiple frame members is made of flexible reinforced plastic, which reduces the weight of the multiple frame members, improving handling during transportation, and allows the multiple frame members to be easily bent upward.

Furthermore, according to the invention described in claim 6, the protective net is provided with multiple rings at predetermined intervals, and the protective net is stretched by inserting the framework material through these rings, so the protective net can be easily attached to and removed from the framework material.

Furthermore, according to the invention described in claim 7, the base ends of the multiple frame members are rotatably attached via fastening fittings provided on the temporary scaffolding, and the temporary scaffolding is provided with an angle adjustment device that adjusts the rotation angle of the frame members. By adjusting the rotation angle of the frame members, it is possible to ensure sufficient dismantling work space below the multiple frame members.

1 is a schematic diagram showing a building demolition and curing device according to one embodiment of the present invention. FIG. FIG. 2 is a schematic plan view showing the building demolition and curing apparatus according to the embodiment. 3 is a schematic cross-sectional view taken along line AA in FIG. 2. FIG. 4 is an enlarged view of part B in FIG. 3 . 3 is an enlarged view showing a connecting member of the framework material provided in part C of FIG. 2. 3 is a side view showing a frame member angle adjustment device provided at part D in FIG. 2. FIG. 7 is a plan view showing the frame member angle adjustment device of FIG. 6. FIG. 2 is a schematic diagram showing a construction sequence 1 of the building demolition and curing device according to the embodiment. FIG. 10 is a schematic diagram showing a construction sequence 2 of the building demolition and curing device according to the embodiment. FIG. 10 is a schematic diagram showing a construction sequence 3 of the building demolition and curing device according to the embodiment. FIG. 10 is a schematic diagram showing a construction procedure 4 of the building demolition and curing device according to the embodiment.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[One embodiment]
Figures 1 to 11 show one embodiment of the present invention. Figure 1 is a schematic diagram showing the configuration of a building demolition and curing apparatus according to one embodiment of the present invention. Figure 2 is a schematic plan view showing the building demolition and curing apparatus according to the same embodiment. Figure 3 is a schematic cross-sectional view taken along line A-A in Figure 2. Figure 4 is an enlarged view of part B in Figure 3. Figure 5 is an enlarged view showing a connecting member for a frame material provided in part C in Figure 2. Figure 6 is a side view showing an angle adjustment device for a frame material provided in part D in Figure 2. Figure 7 is a plan view showing the angle adjustment device for a frame material in Figure 6.

The building demolition and curing equipment 1 of this embodiment is installed to prevent the scattering of dust generated during the demolition work of the building 2 to be demolished, as well as the scattering and falling of fragments of the building's components and waste. In this embodiment, the building 2 to be demolished has a vertical length of 10 to 30 m and a horizontal length of 36 to 54 m. Note that this embodiment can also be applied to buildings of other sizes when the building 2 to be demolished is used.

Furthermore, in the following embodiment of the building demolition and curing device 1, as shown in Figure 1, an example will be described in which the demolition equipment 3 is hoisted onto the roof of the building 2 by a crane (not shown), and the demolition equipment 3 is used to demolish floors one by one, starting from the upper floors. In this upstairs demolition method, a number of reinforcing supports 5 are erected at predetermined intervals between the upper and lower slabs 4 so that the demolition equipment 3 can be placed on the slabs 4 to perform demolition work.

Furthermore, as shown in Figures 1 and 2, the building demolition and curing device 1 is broadly composed of a temporary scaffolding 10, multiple framework members 20, and multiple divided curing nets 30.

A large number of temporary scaffolding 10 are continuously installed in the vertical and horizontal directions along the perimeter of the outer wall of the building 2 to be demolished, using connecting members 6 called wall ties. The temporary scaffolding 10 has soundproofing panels 11 constructed flush with the outer perimeter along the outer wall of the building 2, and is a work scaffolding used by workers during the demolition work of the building 2.

As shown in Figure 2, many frame members 20 are strung in pairs across opposing horizontal temporary scaffolding 10 on the rooftop at regular intervals. One frame member 20 is provided at each of the horizontal ends of the building 2. As shown in Figures 3 and 4, the frame members 20 in pairs are arranged with a distance D from the radial center of the adjacent frame members 20. This distance D is set to, for example, 140 mm.

Each frame member 20 is formed as a rod-shaped pipe and is split into two at approximately the center in the longitudinal direction. Incidentally, in this embodiment, when the vertical length of the building 2 to be demolished reaches 30 m, it becomes difficult to span a single frame member 20 by bending it into an arch shape with the center of the length convex upward. Therefore, by splitting the frame member 20 into two at approximately the center in the longitudinal direction, the weight is reduced and handling is improved.

The two divided frame members 20 are shown in Figure 5 as divided frame members 21 and 22, and the tip ends 21b and 22b of these divided frame members 21 and 22 are connected by a coupler 23 as a connecting member. In this embodiment, the tip ends 21b and 22b of the divided frame members 21 and 22 are connected by a coupler, but this connection method is not limited to this, and wire connection is also possible. In other words, any connection method that is secure and easily detachable will suffice.

The frame segments 21, 22 are normally straight, but must be arched so that the center of their length is convex upward during curing. Therefore, they require highly flexible materials that can flexibly adapt to the shape of the building 2. Furthermore, since the frame segments 21, 22 may bend significantly in strong winds during curing and come into contact with the demolition equipment 3, they require materials with high bending strength and rigidity after bending. Furthermore, since they are constantly used in a deformed state during curing, they require materials with high creep resistance. Furthermore, the frame segments 21, 22 must be tough enough to withstand a certain degree of impact, so that even if they come into contact with the attachment of the demolition equipment 3 during demolition work, they will not be damaged by the impact and the resulting recoil will not cause the temporary scaffolding 10 to collapse. The frame segments 21, 22 also require lightweight materials for easy transportation. To meet these conditions, the frame segments 21 and 22 in this embodiment are made of, for example, carbon fiber reinforced plastics.

In the following, the ends of the divided frame members 21, 22 that are attached to the temporary scaffolding 10 will be referred to as base ends 21a, 22a, and the ends that are connected by the coupler 23 will be referred to as tip ends 21b, 22b.

The divided frame members 21, 22 have a telescopic structure, similar to a fishing rod, that can extend and retract from the base end 21a, 22a to the tip end 21b, 22b. This telescopic structure is made up of multiple pipes that are gradually tapered in diameter from the base end 21a, 22a to the tip end 21b, 22b, and are assembled together to enable extension and contraction. The joints between these multiple assembled pipes form a step 25, as shown in Figure 8.

As shown in Figure 2, the protective net 30 is stretched to cover almost the entire frame material 20, to which the divided frame materials 21, 22 are connected, from the tip ends 21b, 22b to the base ends 21a, 22a. The protective net 30 is divided into multiple pieces (10 pieces in this embodiment) along the horizontal length of the building 2, and multiple metal or resin rings 31, as shown in Figures 3 and 4, are attached to both sides of the width of these 10 horizontally divided protective nets 30 at regular intervals along the length. The frame materials 20 (divided frame materials 21, 22) are inserted into these rings 31, and the protective net 30 is stretched by the divided frame materials 21, 22.

As a result, each of the ten divided protective nets 30 and the framework members 20 attached to both sides of each net constitute a single unit, allowing them to be attached and detached separately from the temporary scaffolding 10. This makes it possible to attach and detach multiple units or a single unit at a time as the demolition work progresses. The protective net 30 of this embodiment has a length of 36 to 54 m in the horizontal direction of the building 2, and since this length is divided into ten pieces, the width of each piece is 3.6 to 5.4 m. Here, the protective net 30 has a mesh size that is large enough to prevent debris and waste from the building 2's components that are generated during the demolition work of the building 2 from scattering or falling.

It is desirable that the attachment spacing of the multiple rings 31 to the protective net 30 corresponds to the spacing of the connecting parts of the telescopic structure of the divided frame members 21, 22. By arranging the multiple rings 31 in this manner, the multiple rings 31 are locked by the stepped parts 25 (shown in Figure 8) of the connecting parts of the telescopic structure, preventing the protective net 30 from shifting out of position.

As shown in Figures 6 and 7, the base ends of a pair of frame members 20 are rotatably attached to one building material 10a on the building 2 side at the top level of the temporary scaffolding 10 by means of universal clamps 12 that serve as fastening hardware. Above the building material 10a to which these universal clamps 12 are attached, two manual winches 40, 50 that serve as angle adjustment devices are installed at a distance in the vertical direction. These manual winches 40, 50 each include a rotating lever 41, 51 that can be manually rotated by a worker, and a rotating drum 42, 52 around which a towing rope 43, 53 is wound. The tip ends 43a, 53a of these towing ropes 43, 53 are fixed to locking portions 24, 24 that are positioned at a fixed position from the base ends of the pair of frame members 20.

As a result, when a worker rotates the rotating lever 41 of the manual winch 40 in one direction, the rotating drum 42 rotates and winds up the towing rope 43, causing the divided frame members 22 of the frame members 20 to rotate diagonally upward as shown by the two-dot chain line in Figure 6, bending them into an arch shape with the center portion in the longitudinal direction convex upward. The same occurs when the rotating lever 51 of the manual winch 50 is rotated in one direction. As a result, a demolition work space 60 is formed below the multiple frame members 20 on which the protective net 30 is stretched. In this case, as shown in Figure 1, the height H from the roof slab 4 to the highest protective net 30 is, for example, approximately 7 to 10 meters.

Next, we will explain the construction procedure for the building demolition and curing equipment related to this embodiment.

Figure 8 is a schematic diagram showing construction sequence 1 of the building demolition and curing device according to the embodiment. Figure 9 is a schematic diagram showing construction sequence 2 of the building demolition and curing device according to the embodiment. Figure 10 is a schematic diagram showing construction sequence 3 of the building demolition and curing device according to the embodiment. Figure 11 is a schematic diagram showing construction sequence 4 of the building demolition and curing device according to the embodiment.

First, temporary scaffolding 10 is placed around the four outer walls of the building 2 to be demolished using connecting members 6.

In this embodiment, since an upper-floor demolition method is applied, a large number of reinforcing supports 5 are installed in advance at predetermined intervals between the upper and lower slabs 4 of each floor except the roof so that demolition equipment 3 can be placed on the slabs 4 for work. The demolition equipment 3 is then lifted and installed on the slab 4 on the roof of the building 2 by a crane (not shown). The installation of the temporary scaffolding 10 and the installation of the reinforcing supports 5 may be performed in the opposite order, or simultaneously.

Next, at the top of the temporary scaffolding 10, flexible clamps 12 are attached to the opposing building materials 10a. The base ends 21a, 22a of the segmented frame members 21, 22 are fixed to these flexible clamps 12, respectively. At this time, the overall length of each of the segmented frame members 21, 22 is shortened. Then, as shown in Figure 8, the tips 43a, 53a of the towing ropes 43, 53 of two manual winches 40, 50 installed above the building materials 10a to which each flexible clamp 12 is attached are connected to the locking portions 24, 24 of the segmented frame members 21, 22. By hanging each of the segmented frame members 21, 22 from the towing ropes 43, 53 of the manual winches 40, 50, the overall length of each of the segmented frame members 21, 22 is then extended.

Furthermore, as shown in Figure 9, multiple rings 31 attached to the protective net 30 on adjacent divided frame members 21, 22 are inserted from the tip ends 21b, 22b of the divided frame members 21, 22 toward the base ends 21a, 22a, as shown by the arrows, thereby tensioning the protective net 30 between the divided frame members 21, 22.

Next, as shown by the arrows in Figure 10, the tip ends 21b, 22b of the divided frame members 21, 22, on which the protective net 30 has been stretched, are connected together using couplers 23. In this state, the frame member 20 is curved so that the center portion in the longitudinal direction is convex downward.

The worker then rotates the rotating lever 41 (or 51) of the manual winch 40 (or 50) to wind up the towing rope 43 (or 53), thereby rotating each frame member 20 diagonally upward as shown by the dashed arrows in Figure 11, and raising each frame member 20 so that the center of its length is curved upward and convex. As a result, a high demolition work space 60 is formed below the multiple frame members 20 on which the protective netting 30 has been stretched. In this state, demolition work is carried out using the demolition heavy equipment 3 shown in Figure 1.

Here, during demolition work using the demolition equipment 3, the demolition equipment 3 may raise the frame materials 20 high in the central area (center) of the building 2 in a plan view to perform tasks such as dividing, sorting, and dropping the demolished materials, which requires a large working space.

On the other hand, near the outer periphery (periphery) of the building 2 in plan view, the demolition machinery 3 mainly performs work to demolish the building frame, so there is no need to raise the frame materials 20 higher than the center, and there is no need to secure a working space higher than the center.

In this embodiment, even though the height of the temporary scaffolding 10 is lower than in conventional roof curing methods, the framework 20 for installing the curing net 30 is curved so that the central portion in the longitudinal direction is convex upward, raising the framework 20 higher than the vicinity of the periphery, thereby ensuring sufficient space for demolition work using demolition machinery 3 in the central portion of the building 2.

Next, as demolition work on the top floor progresses and the framework 20 is replaced with the temporary scaffolding 10 on the lower level, in this embodiment, the towing ropes 43, 53 of the manual winches 40, 50 are loosened to lower the tip ends 21b, 22b of the divided framework members 21, 22, and then the manual winches 40, 50 and the divided framework members 21, 22 are removed from the flexible clamps 12, 12 of the temporary scaffolding 10.

Then, the flexible clamps 12, manual winches 40, 50, and divided frame members 21, 22 are transported to the underlying temporary scaffolding 10, after which the flexible clamps 12 and manual winches 40, 50 are attached to the temporary scaffolding 10, and the base ends 21a, 22a of the divided frame members 21, 22 are attached to each flexible clamp 12, 12. After going through the same construction process as above, each frame member 20 is rotated diagonally upward, and the central portion of each frame member 20 is reconstructed so that it curves upward and is raised so that it is convex in the longitudinal direction.

According to this embodiment, multiple framework members 20 are strung across temporary scaffolding 10, each of which is formed in a rod-like shape and divided lengthwise, with the base end of each member rotatably attached to the temporary scaffolding 10. A protective net 30 is stretched across the multiple framework members 20, and by rotating the multiple framework members 20 upward, a demolition work space 60 is formed below the multiple framework members 20 to which the protective net 30 is stretched. This allows the framework members 20 and the protective net 30 to be easily attached and removed, significantly improving the efficiency of demolition work.

Furthermore, according to this embodiment, the multiple frame members 20 are formed so that they curve upward, making it possible to more fully secure the demolition work space 60. In addition, the multiple frame members 20 are normally straight, but when cured, they are curved in an arch shape so that the central portion in the longitudinal direction is convex upward. This makes them more rigid than when they are formed straight, and they do not bend significantly even in strong winds, making it possible to prevent the demolition heavy equipment 3 from coming into contact with the frame members 20.

In addition, according to this embodiment, the multiple frame members 20 are each configured to be split lengthwise and extendable, so that by shortening the frame members 20 during transportation, handling is improved and the frame members 20 can be easily attached to and removed from the temporary scaffolding 10. By shortening the split frame members 21, 22 that are split lengthwise during transportation, handling is improved and the split frame members 21, 22 can be easily attached to and removed from the temporary scaffolding 10.

In addition, according to this embodiment, the divided ends of the multiple frame members are connected by connecting members, making it easy to attach and remove the frame members and protective netting.

In addition, according to this embodiment, each of the multiple frame members 20 is made of flexible reinforced plastic, which reduces the weight of the multiple frame members 20, improving handling during transportation, and allows the multiple frame members 20 to be easily bent upward.

Furthermore, according to this embodiment, the protective net 30 is provided with multiple rings 31 at predetermined intervals, and the protective net 30 is stretched by inserting the framework material 20 through these rings 31, so the protective net 30 can be easily attached and detached from the framework material 20.

In addition, according to this embodiment, the base ends of the multiple frame members 20 are rotatably attached via universal clamps 12 provided on the temporary scaffolding 10, and the temporary scaffolding 10 is provided with a manual winch 40 that adjusts the rotation angle of the frame members 20. By adjusting the rotation angle of the frame members 20, it is possible to ensure sufficient demolition work space 60 below the multiple frame members 20.

[Another embodiment of the invention]
Although one embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. This embodiment can be embodied in various other forms, and various omissions, substitutions, modifications, and combinations can be made without departing from the spirit of the invention. This embodiment and its modifications are included within the scope and spirit of the invention, as well as the invention described in the claims and their equivalents.

In the above embodiment, when replacing the temporary scaffolding 10 on the floor below, the upwardly convex arch shape of the framework 20 is temporarily dismantled and then reconstructed. However, this is not a limitation. For example, rails could be installed along the vertical direction of the building material 10a of the temporary scaffolding 10, and the flexible clamps 12 and manual winch 40 could be movably installed along these rails. If the flexible clamps 12 and manual winch 40 were equipped with stopper functions that stop them at predetermined positions on the rails, the arch-shaped unit formed by the framework 20 and protective netting 30 could be moved to the floor below in its constructed arch shape without having to be temporarily dismantled. This configuration can further improve work efficiency.

In addition, in the above embodiment, an example was described in which a flexible clamp 12 was used as the fastening fixture, but this is not limited to this, and any component that can rotatably hold the base end of the framework material 20 may be used.

In addition, in the above embodiment, by installing a watering hose along the length of the frame material 20, dust generated during demolition work can be reduced by spraying water from this watering hose.

Furthermore, in the above embodiment, if the pipes used in the framework members 20 are provided with fine holes at regular intervals, the ends of the framework members 20 can be connected to a watering hose to spray water directly from the framework members 20, simplifying the structure and further reducing dust generated during demolition work.

In this case, the protective net 30 and the framework materials 20 attached to both sides of it are treated as one unit, and a dust sensor is installed in each unit. The dust sensor detects the amount of airborne dust generated by the demolition work and outputs the detection signal to a microcomputer acting as a control means. A threshold for the amount of airborne dust is pre-stored in the memory of this microcomputer, and if the microcomputer determines that the amount of airborne dust has exceeded this threshold, the microcomputer may output a control signal to, for example, a solenoid valve that supplies or stops water, thereby controlling the framework materials 20 of each unit to spray water. This configuration allows for concentrated spraying in areas where large amounts of airborne dust are generated.

In the above embodiment, if a camera is installed on the framework member 20 and a monitor that displays the image on the camera via a wired or wireless connection is installed in a different location, it is possible to broadcast images from above the demolition location. Furthermore, if the camera can be remotely moved along the framework member 20, more detailed images can be provided.

Furthermore, while the above embodiment describes an example in which the invention is applied to an upper-floor demolition method, it is not limited to this method and can also be applied to other demolition methods.

Furthermore, in the above embodiment, the framework members 20 were assembled so that the central portion in the longitudinal direction was curved convexly upward, allowing the framework members 20 to be raised high. However, this is not limited to this. As long as a demolition work space 60 can be formed below the framework members 20 on which the protective net 30 is stretched by rotating the framework members 20 upward, the framework members 20 may be assembled to have a horizontal portion, such as a trapezoid.

DESCRIPTION OF SYMBOLS 1 Building demolition and curing device 2 Building 3 Demolition heavy equipment 4 Slab 5 Reinforcement support 6 Connection member 10 Temporary scaffolding 11 Soundproof panel 12 Free clamp (fastening metal fitting)
20 Frame member 21 Divided frame member 21a Base end portion 21b Tip portion 22 Divided frame member 22a Base end portion 22b Tip portion 23 Coupler (connecting member)
24: Locking portion 25: Step portion 30: Protective net 31: Ring 40: Manual winch (angle adjustment device)
41 Rotating lever 42 Rotating drum 43 Towing rope 43a Tip 50 Manual winch (angle adjustment device)
51 Rotating lever 52 Rotating drum 53 Towing rope 53a Tip 60 Dismantling work space

Claims (7)

Temporary scaffolding set up along the outer wall of the building to be demolished;
A plurality of framework members are bridged between the opposing temporary scaffoldings, each formed in a rod shape and divided in the length direction, with each base end rotatably attached to the temporary scaffolding;
and a protective net stretched from the tip end to the base end of the plurality of framework members,
A building demolition and curing device characterized in that a demolition work space is formed below the plurality of frame members on which the curing net is stretched by rotating the plurality of frame members upward. The building demolition and curing device described in claim 1, characterized in that the multiple frame members are formed to curve upward. The building demolition and curing device described in claim 1, characterized in that the multiple frame members are each configured to be split lengthwise and extendable. The building demolition and curing device described in claim 3, characterized in that the divided ends of the multiple frame members are connected by connecting members. The building demolition and curing device described in claim 1, characterized in that each of the multiple frame members is made of flexible reinforced plastic. The building demolition and curing device described in claim 1, characterized in that the curing net has multiple rings at predetermined intervals, and the curing net is tensioned by inserting the frame members through these rings. The building demolition and curing device described in claim 1, characterized in that the base ends of each of the multiple frame members are rotatably attached via fastening fittings provided on the temporary scaffolding, and the temporary scaffolding is provided with an angle adjustment device for adjusting the rotation angle of the frame members.