JPH10196160A - Chimney construction work method and protective device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect the inside of a chimney cylinder, and to conduct chimney construction works by installing a balloon into the chimney cylinder, expanding the balloon by air supply and fast sticking the balloon into the chimney cylinder. SOLUTION: Balloon bodies 11 for top-section openings are mounted to a top section from the upper section of a platform 62 as the top-section openings of chimney cylinders 61. The insides of the balloon bodies 11 are supplied with air by an air supply blower, and the balloon bodies 11 are expanded, and fast stuck onto the whole internal surface of the top section. Retaining rings for hold-down ropes are set up for preventing dispersion by the strong air of the balloon bodies 11 at that time, and the hold-down ropes are passed through the retaining rings and fixed onto the platform 62 of the chimney top section on both sides of the ropes. Raindrop-shaped curtains are fitted on the whole circumferences of the top faces of the balloon bodies 11 and hung down to the outside, and the penetration of rain is prevented. Bushings are installed to the raindrop-shaped curtains, fixing ropes are mounted to the bushings and fixed onto handrails 63, and the balloon bodies 11 are fastened. Accordingly, the protective facility is set up easily and safely, and mandays can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a new construction of a chimney,
Alternatively, the present invention relates to a chimney construction method applied to repair work and the like and a protective device therefor.

[0002]

2. Description of the Related Art FIG. 10 is an explanatory view of a conventional top awning used for a new construction or repair work of a chimney. In the figure, when repair work or the like inside the chimney cylinder 61 is performed, a scaffold pipe 53 is used to form a skeleton having a water gradient with a scaffold pipe 53 on the chimney cylinder 61 as a protective cover for rain protection or the like at the top of the chimney cylinder 61. A scaffold plate 54 is laid thereon, and a flameproof sheet 55 is laid on the scaffold plate 54 so as to prevent rainwater or the like from entering the entire upper surface, and the flameproof sheet 55 is spread over the flameproof sheet 55 so as not to be scattered.
5 is put on a safety net 56, and the whole surface is a scaffold pipe 53.
Cremona rope 5
7 tied and fixed. Since the repair work is a very dangerous work because there is no scaffolding inside the chimney body 61, it is necessary to extend a safety rope 52 for performing the work safely before the work.

FIG. 11 is an explanatory view of a conventional fall protection facility for above-ground structures used for new construction or repair work of a chimney. In the figure, when repair work etc. of the chimney cylinder body 61 is performed, during work at a high place, as a facility for protecting falling objects from the adjacent structures such as the fuel tank, a walkway around the upper surface of the fuel tank 75 on the fuel tank 75. A stanchion is set up by the scaffolding pipe 53 using the handrail of the above, and a plane framing by the scaffolding pipe 53 is assembled using the clamp 51 for the scaffolding pipe 53 1-2 m above the upper surface of the tank. A scaffold plate 54 is spread over the entire surface, and secured to a scaffold pipe 53 with a track line and fixed. The frame of the scaffold pipe 53 is reinforced by providing a bracing or the like by the scaffold pipe 53 as necessary.

FIG. 12 is an explanatory view of a conventional overhead fall protection facility inside a chimney cylinder used for new construction or repair work of a chimney. In the figure, when repair work or the like inside the chimney cylinder 61 is performed, a work place on the bottom hopper inside the chimney cylinder body as protection equipment against falling objects from above the chimney cylinder body 61 during work on the bottom inside the chimney cylinder body. A protective block material, which is framed by a scaffold pipe 53 and has a scaffold plate 54 and a concrete formwork plywood 58 spread on the upper surface thereof, is assembled in a flue 67. Then, the protective block material is lifted from the manhole 69 above the chimney cylinder body by a lifting rope 59 above the head inside the chimney cylinder body and fixed horizontally.

FIG. 13 is an explanatory view of a protection wall at a flue exit in a conventional chimney used for new construction or repair work of a chimney. In the figure, when repairing the lining inside the chimney body 61, etc., swarf from the lining and drainage of cutting water by a water jet, or rebound material when spraying the lining, etc., are discharged from the stack outlet in the chimney to the flue side. In order to prevent the water from entering and falling into the airway, a scaffold pipe 53 is used to form a framework at the exit of the smoke path, and a scaffold plate 54 is attached to the entire surface of the chimney cylinder body 61 side of the framework, and a flameproofing for waterproofing is placed thereon. Partition walls are provided by laying sheets, etc., and used as protective walls.

[0006]

In the above-mentioned conventional chimney construction protection equipment, the conventional top awning is a chimney cylinder body 6 for new chimney construction or repair work.
Although it is indispensable to prevent interruption of work due to rainfall during the construction in 1, the conventional top awning uses a scaffold pipe 53, a clamp 51 for the scaffold pipe 53, a scaffold plate 54, a flameproof sheet 55, There are many types such as the safety net 56 and the cremona rope 57, and the number is very large. Therefore, there is a high risk of falling when transporting or mounting to a high place. The construction is also a scaffold assembling work at an ultra-high place, and there is no work floor inside the top of the chimney body 61, and the work is extremely dangerous. In addition, the awning sheet stretched over the top of the chimney cylinder body 61 is provided with a water gradient to allow rainwater to flow to the outside of the chimney cylinder body 61 so that one side is higher than the top of the chimney cylinder body 61, so there are many gaps and poor airtightness. . There is a danger that exhaust gas will enter due to downwash from another chimney cylinder body 61 adjacent to this gap, and it is desired to improve the airtightness of the awning at the top of the chimney cylinder body 61. In addition, in the case of a chimney of an outer cylinder type, the diameter of the outer cylinder is large, so that it is extremely difficult and expensive to provide a roof for rain protection.

[0007] In addition, the conventional fall protection equipment for above-ground structures also uses a scaffold pipe 53 on the upper surface of the fuel tank 75 or the like, and then spreads a scaffold plate 54 over the entire surface. The installation cost also increases. In addition, the conventional overhead fall protection equipment inside the chimney cylinder body also uses a protection block material assembled with the scaffold pipe 53 and the scaffold plate 54 in the flue 67 because of the danger of falling objects from the upper part inside the chimney cylinder body 61. Since it is pulled out into the chimney cylinder body 61 and suspended above the head, it can be assembled and mounted only with a protective material smaller than the inner diameter of the chimney cylinder body 61. It takes time. In addition, the protective wall of the stack outlet in the conventional chimney is provided with a frame with a scaffold pipe 53 on the entire surface of the stack outlet, a scaffold plate 54 is attached on the entire stack side of the chimney cylinder 61 side, and a flameproof sheet is stretched. Although it is waterproof and cured, it is inferior in airtightness and is dangerous work.

[0008]

SUMMARY OF THE INVENTION The chimney construction method according to the present invention aims at solving the above-mentioned problems. A balloon is provided inside a chimney cylinder body, inflated by air supply, and brought into close contact with the chimney cylinder body. Protect the inside of the chimney cylinder and perform chimney construction.

Further, the protection device for chimney construction according to the present invention is arranged such that a balloon is installed inside the top of the chimney tube body, inflated by air supply, closely adheres to the inside of the top portion, and protects the inside of the chimney tube body from rainfall. Has become.

[0010] Further, the protection device for chimney construction according to the present invention is arranged such that a balloon is installed on the above-ground structure around the chimney and is inflated by air supply to protect the above-mentioned above-ground structure from falling objects from the above-mentioned chimney. Has become.

Further, in the protection apparatus for chimney construction according to the present invention, a balloon is provided inside the chimney cylinder body, and is inflated by air supply to closely adhere to the inside of the chimney cylinder body, and the chimney is provided below the inside of the chimney cylinder body. It is designed to protect from falling objects inside.

Further, in the protective device for chimney construction according to the present invention, a balloon is provided inside the chimney of the chimney cylinder body, and is inflated by air supply to closely adhere to the inside of the chimney, so that the inside of the chimney of the chimney is the chimney. It is designed to be shielded from the cylinder.

As described above, when a chimney is constructed, a balloon is provided as a protective device in the chimney of the chimney to be constructed and inflated, so that the balloon adheres to the entire inner periphery, and the inside of the cylinder is shut off by the balloon. Protected. In addition, by installing a balloon inside the top of the chimney barrel for inflation of the top of the chimney barrel and inflating it, it prevents rainfall and harmful gas from entering the inside of the chimney barrel, and releases dust and other substances from inside. Can be prevented. In addition, when performing chimney construction, by placing a balloon on the ground structure as a protective facility for the ground structure and inflating it, the internal air pressure acts as a cushion against falling objects and absorbs shock, Protect ground structures from falling objects from the chimney. In addition, a balloon is installed in the chimney as a protection facility for the inside of the chimney cylinder and the stack, and the balloon is inflated to protect the inside of the chimney cylinder and the stack from falling objects in the chimney. By using the balloon as a protection device for chimney construction in this way, the protection performance of the protection equipment is improved. Also, the number of members of the protective equipment is reduced, and the weight is also reduced. In addition, when constructing the protective equipment, there is no framework work for scaffolding materials at an ultra-high place, so that the protective equipment can be easily and safely installed, and the number of steps can be reduced. In addition, the protective equipment is lightweight and has a simple structure, so it is easy to install and dismantle,
Installation and dismantling of protective equipment can be performed easily in a short time.

[0014]

1 to 3 are explanatory views of a chimney construction protection system according to a first embodiment of the present invention, and FIGS. 4 to 6 are diagrams illustrating a second embodiment of the present invention. FIG. 7 is an explanatory view of a chimney construction protection facility, FIG. 7 is an illustration of a chimney construction protection facility according to a third embodiment of the present invention, and FIG. 8 is a chimney construction protection of a fourth embodiment of the present invention. FIG. 9 is an explanatory view of a facility, and FIG. 9 is an explanatory view of a protection facility for chimney work according to a fifth embodiment of the present invention. In the figure, the protective equipment for chimney construction according to these embodiments is used for new construction or repair work of a chimney, reference numeral 11 in the figure is a balloon body for top awning, 12 is a rain curtain, 13 is Sheet for internal reinforcement, 14 is an air supply duct, 15 is a snap, 16
Is a holding ring for a holding rope, 17 is a holding rope, 18 is a securing rope, 19 is a core rope of a rain hanging curtain, 20 is an air supply blower, 31 is a balloon body for rain prevention, 32 is a sheet for internal reinforcement, 33 Is a drain pump, 34 is a fastener for connecting the balloon body, 35 is a rain-proof hanging curtain, 41 is a balloon body for fall protection, 42 is a reinforcing sheet, 43 is a balloon body for a protection wall, 56 is a safety net, and 61 is a safety net. Chimney barrel, 6
2 is a walkway, 63 is a walkway handrail, 64 is a walkway bracket, 65 is a handrail stanchion, 66 is a ladder with a back basket, 67 is a flue, 68 is a flueway, 69 is a manhole, 7
1 is an outer cylinder of a chimney, 72 is an inner cylinder, 73 is a horizontal support beam, 74
Is a haunch, and 75 is a fuel tank.

In FIGS. 1 to 3, the protective equipment for chimney construction according to the first embodiment, as shown in FIG. 1, has a top awning on the top of the chimney barrel 61 as a top awning. The balloon main body 11 is mounted from above the top corridor 62, and is supplied to the inside of the balloon main body 11 by the air supply blower 20 to be inflated, so that the inner surface of the top of the chimney cylinder body 61 is fully adhered. As shown in FIG. 2, the balloon body 11 of the top awning has a structure adapted to the shape of the top of the chimney barrel 61, and improves the adhesion to the inner surface of the chimney barrel 61. Top awning balloon body 1
1 is provided with a holding ring 16 for the holding rope 17 so that the holding rope 17 can be attached in order to prevent scattering by strong wind. The holding ring 16 passes through the holding rope 17 to the side corridor 62 at the top of the chimney on both sides of the holding rope 17. Secured and secured. A rain hanging curtain 12 is provided on the entire upper surface of the balloon body 11 of the top awning and hangs outside the top of the cylindrical body to prevent rain from entering the inside of the cylindrical body. Rain curtain 12
Is provided with a diaper 15 as shown in FIG.
A securing rope 18 is attached to the eyelet 15 and secured to the handrail 63 of the walkway 62, and the balloon body 11 of the top awning is attached.
Is fixed.

[0016] Thus, the inside and outside of the cylinder at the top of the cylinder are completely shut off to prevent the intrusion of rainwater and the intrusion of exhaust gas from the adjacent cylinder, and to prevent dust from flowing from inside the cylinder to outside the cylinder. Leakage is prevented.

4 to 6, the chimney construction protection equipment according to the second embodiment is installed at the top of a cylindrical chimney as a rain-proof balloon device as shown in FIG. The balloon body 31 for rain protection is placed on the haunch 74 and the horizontal beam 73 at the top of the outer cylinder type chimney, and air is blown into the balloon body 31 by the air supply blower 20 through the air supply duct 14 to expand the balloon body 31. However, as shown in FIG. 5, it is used as a temporary rainproof roof. The rainwater that has fallen on the roof is collected in the haunch 74 and is discharged to the outside of the outer cylinder by the drain pump 33, so that work can be performed inside.
This rain-prevention balloon main body 31 has a large outside diameter as well as the inside diameter of the chimney, and is inconvenient to handle. Therefore, as shown in FIG. Fasteners 34 for connecting the respective balloon bodies 31 are mounted on the upper and lower sides, and these fasteners 34 connect the respective parts A to D integrally. As shown in FIG. 4B, a rain-proof hanging 35 is hung over the fastener 34 at the connection portion of the rain-proof balloon to prevent rainwater from entering. In addition, the divided balloon body 3 for rain protection
Each of 1A to 1D is provided with an air supply duct 14, which is connected to an air supply blower 20 by a hose and supplied as a single balloon. This rain-proof balloon device is easy to handle and can be installed safely and quickly in case of rainfall, and can be safely and quickly removed.

In FIG. 7, as shown in the figure, the protection equipment for chimney construction according to the third embodiment is provided on a top surface of a circular fuel tank 75 or the like, for example, as a balloon device for fall protection of an outer cylinder above-ground structure. The balloon main body 41 for drop protection having a diameter larger than that of the fuel tank 75 is placed on the balloon main body 4.
1, a reinforcing sheet 42 on the upper surface and a safety net 56 thereon.
The safety net 56 is inflated by supplying air through the air supply duct 14 through the air supply duct 14, and the securing rope 17 is hung on a part and the entirety of the safety net 56. Secured to prevent scattering.

Since the fall protection balloon is lightweight,
Easy to install and dismantle, safe and quick construction. In addition, since the internal pressure of the balloon body 41 for fall protection plays a role of an air cushion for falling objects, the protection effect is improved.

In FIG. 8, the protection equipment for chimney construction according to the fourth embodiment is, as shown in FIG. The protection balloon main body 41 is carried to the vicinity of the smoke channel, and the air supply duct 14 and the fallen object protection balloon main body 41 are connected to each other. The end of the air supply duct 14 is connected to the air supply blower 20 installed near the smoke passage 68, and the air supply blower 20 is operated to supply air into the balloon main body 41. Balloon body 4 for protecting falling objects
1 is inflated by this air supply, closely adheres to the inner surface of the cylinder body, and is fixed by contact resistance with the inner surface of the cylinder body. A reinforcing sheet 42 is provided on the upper surface of the balloon body 41 for fall protection.

Since the internal pressure of the fall protection balloon 41 acts as a cushion and absorbs the impact safely, the protection effect is improved because it withstands the impact of the falling object. Further, the installation and disassembly are easy, so that the construction period is shortened.

In FIG. 9, the protection equipment for the chimney construction according to the fifth embodiment is shown in the figure. It is installed at the flue 68 to prevent it from entering. The balloon body 43 for the protective wall is carried in from the flue 67 and carried to the flue 68.
The air supply duct 14 and the air supply blower 20 are attached to the balloon body 43.
Are connected to each other and placed at the bottom of the smoke channel opening 68, and the air supply blower 20 is operated to inflate the balloon body 43 for the protective wall. The balloon body 43 is inflated while intervening along the boundary between the chimney opening 68 and the chimney cylinder body 61 so that the balloon main body 43 is in close contact with the inner surface of the chimney opening 68. A reinforced sheet 42 is attached to the surface of the protective wall balloon 43 on the cylinder body side.

The present protective equipment prevents damage caused by falling objects as protective equipment in chimney repair work. Further, with respect to the drainage, the protection wall balloon 43 is always supplied with air by the air supply blower 20 and is brought into close contact with the entire periphery of the smoke channel opening 68, so that the inflow of water into the flue 67 can be prevented.

In conventional protection equipment for chimney work, the conventional top awning is indispensable to prevent interruption of work due to rainfall during construction work inside the chimney tube during new construction or repair work of the chimney. The top awning is used for scaffolding pipes, clamps for scaffolding pipes,
There are many types such as scaffolds, flameproof sheets, safety nets, cremona ropes, and the number is very large. Therefore, there is a high risk of falling when transporting or mounting to a high place. The construction is also an assembling work at an ultra-high altitude, and there is no work floor inside the chimney cylinder top, making the operation extremely dangerous. Also, the awning sheet stretched over the top of the chimney cylinder has a water gradient to allow rainwater to flow to the outside of the chimney cylinder, so that one side is higher than the top of the chimney cylinder. There is a risk that exhaust gas will enter due to downwash from another chimney cylinder body adjacent to this gap, and it is desired to improve the airtightness of the awning at the top of the chimney cylinder body. In addition, in the case of a chimney of an outer cylinder type, the diameter of the outer cylinder is large, so that it is extremely difficult and expensive to provide a roof for rain protection. In addition, conventional fall protection equipment for above-ground structures also uses scaffolding pipes on the top surface of fuel tanks, etc., and then spreads scaffolding boards over the entire surface, but this is dangerous work and installation costs are high. . In addition, conventional overhead fall protection equipment inside the chimney cylinder also draws out the protective block material assembled with scaffolding pipes and scaffold plates in the chimney because there is a risk of falling objects from the upper part of the chimney cylinder, Since it is installed suspended above the head, only a protective material smaller than the inner diameter of the chimney cylinder can be assembled and mounted, and there is a gap around it, which is not safe, and it takes time to install and disassemble. In addition, the protective wall at the stack outlet in the conventional chimney is provided with a framework with scaffolding pipes on the entire surface of the stack outlet, and a scaffold plate is attached on the entire chimney cylinder body side of this framework, and a flameproof sheet is stretched and waterproofed. And curing,
This is a dangerous work with poor airtightness. In order to solve these problems, the chimney protection equipment according to each of the above-described embodiments is provided with a balloon body 11 for top awning inside the top of the chimney cylinder body 61 to prevent intrusion of rain and harmful gas. And the emission of dust from inside can be prevented. Alternatively, since the members are lightweight and have a simple structure, they can be easily installed and disassembled. Alternatively, installation and disassembly can be easily performed in a short time by using such a balloon main body 31 as an openable / closable tower-top roof at the time of constructing an outer cylinder type chimney. In addition, the fall protection of the overhead structure such as the fuel tank 75 and the chimney cylinder 6
It is also possible to use the upper surface of the balloon main body 41 and the side surface of the balloon main body 43 with a reinforced sheet 42 to reinforce the upper wall of the balloon main body 41 and the side wall of the balloon main body 43 as a protective wall for the overhead protection at the time of operation in the inside 1 and the smoke channel 68. The balloon body 11 for top awning is carried to the top of the chimney body 61 to be worked and inflated in the top cylinder, so that the balloon body 11 comes into close contact with the entire inner surface of the top of the chimney body. The inside and outside of the cylinder are shut off by the balloon body 11. By constantly supplying air into the balloon body 11 with an electric air supply blower 20,
At 0 Hz, an internal pressure of 190 kg / m ² is generated and the chimney cylinder 6
(1) Adhesion to the inner surface becomes possible. Also, the inflow of rainwater is prevented by the internal pressure on the upper surface. Further, against strong wind, scattering is prevented by tying the whole with the holding rope 17 and the surrounding tying rope 18. In addition, in the case of the outer cylinder type chimney, the outer cylinder 71
The integrated balloon main body 31 or the divided balloon main body 31 is connected by a fastener 34 in accordance with the inner diameter of the above, and is hung on a haunch 74 on the top and inflated by an air supply blower 20 to form a temporary roof. By discharging the rainwater falling from the temporary roof to the outside of the outer cylinder 71 by the drain pump 33 provided on the haunch 74, the inside of the outer cylinder 71 can be kept in a dry state, and can be used as a rainproof roof in rainy weather. It becomes possible. In addition, by placing the balloon body 41 on the upper part of a structure such as the fuel tank 75, the internal air pressure and the upper reinforcing cloth serve as a cushion against falling objects, and absorb impact to protect the ground. Function becomes possible. Similarly, the balloon body 41 and the smoke outlet 6 for drop protection provided above the inside of the chimney canister 61 also serve as overhead protection for work inside the chimney canister 61 and as a protective wall for the smoke outlet 68.
The reinforced sheet 42 of the balloon body 43 for the fall protection wall 8 and the air pressure inside serve as a cushion against falling objects, and function as protection equipment by absorbing shock. As a result, the use of the balloon-type top awning as an awning at an extremely high place is reduced by 70% and the weight is reduced by 90%. In addition, since there is no scaffolding framework work at an ultra-high place, the construction is safe and the number of steps is reduced, and the function as an awning is improved. Also,
The balloon main body 31 as a temporary roof of the outer cylinder 71 can be easily installed and disassembled in a short time, so that the operation inside the chimney cylinder body 61 during rainy weather becomes possible. Further, the balloon main body 41 as fall protection for the above-ground structure is easily installed and disassembled, and the construction period can be shortened safely. In addition, balloon main bodies 41 and 4 used as overhead fall protection in the chimney body 61 and as a protective wall of the chimney 67.
3 is easy to install and dismantle, can be safely installed, can shorten the process, and improves the protection performance.

[0025]

The chimney construction and its protection device according to the present invention are constructed as described above. By using a balloon as a protection device for chimney construction, the protection performance of the protection equipment is improved and the protection equipment is improved. The number of components decreases, the weight also decreases, and there is no scaffolding work at ultra-high altitudes when constructing protective equipment.This makes it possible to easily and safely install protective equipment and reduce man-hours. Installation and dismantling is easy because the protection equipment has a lightweight and simple structure, and the installation and dismantling of the protection equipment can be performed easily in a short time. The performance is improved.

[Brief description of the drawings]

FIG. 1 (a) is a front view of a chimney construction protection facility according to a first embodiment of the present invention, and FIG. 1 (b) is a plan view.

FIG. 2A is a plan view of the balloon main body, and FIG. 2B is a cross-sectional view taken along the line BB in FIG. 2A.

FIG. 3 is a detailed view of a main part thereof.

FIG. 4 (a) is a sectional view of a chimney construction protection facility according to a second embodiment of the present invention, and FIG.
, And FIG. 3C is a view taken along the line CC in FIG.

FIG. 5 (a) is a front view of the balloon main body, and FIG. 5 (b) is a plan view.

FIG. 6 is a detailed view of a main part thereof.

FIG. 7 (a) is a front view of a chimney construction protective equipment according to a third embodiment of the present invention, FIG. 7 (b) is a plan view of the balloon body, and FIG. FIG.

8 (a) is a sectional view of a chimney construction protection facility according to a fourth embodiment of the present invention, FIG. 8 (b) is a perspective view of the balloon body, and FIG. 8 (c) is a plan view FIG. 3D is a front view.

9 (a) is a cross-sectional view of a chimney protection device according to a fifth embodiment of the present invention, FIG. 9 (b) is a perspective view of the balloon body, and FIG. 9 (c) is a plan view. FIG. 1D is a front view, and FIG. 1E is a side view.

FIG. 10 is a perspective view of a conventional protection facility for chimney construction.

FIG. 11 (a) is a front view of a conventional protection facility for chimney work, and FIG. 11 (b) is a plan view.

FIG. 12 (a) is a front view of a conventional protection facility for chimney work, and FIG. 12 (b) is a plan view.

FIG. 13 (a) is a front view of a conventional protection facility for chimney work, and FIG. 13 (b) is a perspective view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Balloon body for top awning 12 Rain hanging curtain 13 Sheet for internal reinforcement 14 Air supply duct 15 Stopper 16 Holding ring of holding rope 17 Holding rope 18 Fixing rope 19 Core rope of rain hanging curtain 20 Supply air blower 31 Balloon body 32 internal reinforcement sheet 33 drainage pump 34 balloon body connection fastener 35 rainproof hanging curtain 41 fall protection balloon body 42 reinforcing sheet 43 protection wall balloon body 56 safety net 61 chimney cylinder body 62 walkway 63 handrail of side corridor 64 bracket of side corridor 65 stanchion of handrail 66 ladder with back basket 67 chimney 68 chimney opening 69 manhole 71 chimney outer cylinder 72 inner cylinder 73 horizontal support beam 74 haunch 75 fuel tank

Continued on the front page (72) Inventor Takaaki Maruta 5-1 Enamiokicho, Naka-ku, Hiroshima City Mitsubishi Heavy Industries, Ltd. Hiroshima Branch Office (72) Inventor Katsuji Arita 5-1 Enamiokicho, Naka-ku, Hiroshima City Mitsubishi Heavy Industries Hiroshima Branch Office

Claims (5)

[Claims] 1. A chimney construction method comprising: installing a balloon in a chimney cylinder body; inflating the chimney cylinder body by air supply; and closely adhering to the chimney cylinder body to protect the chimney cylinder body and perform chimney construction. 2. A protection device for a chimney construction, comprising a balloon installed inside the top of the chimney cylinder body and inflated by air supply to closely adhere to the inside of the top part and protect the inside of the chimney cylinder body from rainfall. 3. A protection device for chimney construction, comprising a balloon installed on a ground structure around the chimney and expanding by air supply to protect the ground structure from falling objects from the chimney. 4. A balloon which is provided inside the chimney cylinder body, is inflated by air supply, is in close contact with the inside of the chimney cylinder body, and protects the lower inside of the chimney cylinder body from falling objects in the chimney. Characteristic chimney construction protection device. 5. A balloon which is provided inside a chimney of a chimney cylinder body, is inflated by air supply, closely adheres to the inside of the chimney port, and shields and protects the inside of the chimney of the chimney cylinder from the chimney cylinder body. A protection device for chimney construction.