Suspended scaffold and method for installing the same

Abstract

To install a suspended scaffold in a short time even in a narrow ceiling opening.SOLUTION: A suspended scaffold is provided with a frame 110 above a hollow structure (20), a vertically arranged ladder type post 140 attached to the frame and insertable from a ceiling opening 21, a base unit 150 vertically movable along the post, a bracket 180 attached to the base unit in a folded state and expandable in the direction of a ladder side surface of the post, a front wall abutting unit 190 attached to the base unit and having a tip in contact with a front wall 20A, a floor support fitting 210 attached to the upper end of the bracket in the folded state, a floor panel 220 attached to the floor support fitting in a folded state, an end side wall abutting unit 240 attached to the end of the floor panel and abutted on a side wall 20B when the floor panel is deployed, and means (260) for deploying the bracket and the floor panel.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a suspension scaffold and a method for installing the same, and more particularly, to a suspension scaffold that is suitable for use in work inside a hollow structure such as a boiler or an incinerator, and can be installed extremely easily even in a narrow ceiling opening regardless of the installation position or location, and a method for installing the same.

Background Art

[0002] When performing work such as repair, inspection, cleaning, and maintenance inside various furnaces such as boilers, silos, coke ovens, and incinerators in thermal power plants, it is first necessary to install a scaffold for performing the work inside the furnace.

[0003] For example, Patent Document 1 discloses a technique related to an in-furnace scaffold that can be installed along an arbitrary inclination of an inclined pipe at the bottom of a boiler furnace.

[0004] In addition, Patent Document 2 discloses a technique related to a support structure for a scaffold that can be deployed inside and installed a suspension scaffold even in a hollow structure in which an opening is formed at a position away from the center of the ceiling portion.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, in the technology disclosed in Patent Document 1, since it can only be installed at an arbitrary inclination of the inclined pipe, there is a problem that the installation location is limited. Also, in the technology disclosed in Patent Document 2, it takes time to assemble the disassembled parts of the suspension scaffold inside the furnace, and not only can it not be easily installed, but there is also a problem that the scaffold cannot be expanded and contracted in response to changes in the cross-sectional shape in the height direction inside the hollow structure.

[0007] The present invention has been made in view of such problems, and an object thereof is to provide a stable suspension scaffold that can be installed extremely easily and in a short time regardless of the installation position and location, even in a narrow ceiling opening, and an installation method thereof.

Means for Solving the Problems

[0008] The present invention includes a gantry above the hollow structure, a two-column ladder-type post disposed vertically within the hollow structure that is attached to the gantry and can be inserted from the ceiling opening of the hollow structure, a base unit that can move up and down along the post, a bracket that is attached to the base unit in a folded state and can be deployed in the direction of the ladder side surface of the post, a front wall abutting unit that is attached to the base unit and has a tip abutted against the front wall in the front direction of the ladder of the hollow structure, a floor support fitting attached to the upper end of the bracket in a folded state, a floor panel attached to the floor support fitting in a folded state, an end side wall abutting unit attached to an end of the floor panel and abutted against the side wall in the side direction of the ladder of the hollow structure when the floor panel is deployed, and means for deploying the bracket and the floor panel within the hollow structure. The suspension scaffold is characterized by solving the above problems.

[0009] Here, an end front wall abutting unit that abuts against the front wall when deployed can be provided at an end of the floor panel.

[0010] Further, means for deploying the bracket and the floor panel can be a stopper pin inserted into the diagonal member portion of the bracket.

[0011] Further, the length of the horizontal portion of the front wall abutting unit can be made variable, and the distance to the front wall can be adjusted.

[0012] Further, a deck can be provided on the front wall abutting unit.

[0013] Further, the length of the horizontal portion of the bracket when deployed can be made variable, and the distance to the side wall can be adjusted.

[0014] The present invention also provides a method for installing the suspension scaffold in a hollow structure, comprising the steps of: carrying the post into the hollow structure from the ceiling opening of the hollow structure using a gantry above the hollow structure; installing a base unit on the post; attaching the folded bracket to the base unit; attaching the front wall abutting unit to the base unit and abutting its tip against the front wall of the hollow structure; attaching a floor support fitting to the upper end of the folded bracket; attaching the folded floor panel to the floor support fitting; attaching an end side wall abutting unit that abuts against the side wall of the hollow structure when the floor panel is deployed to the end of the floor panel; and pulling out a stopper pin attached to the bracket in the hollow structure to deploy the bracket and the floor panel and abut the end side wall abutting unit against the side wall.

Advantages of the Invention

[0015] According to the present invention, regardless of the installation position or location, even with a narrow ceiling opening, a stable suspension scaffold can be installed extremely easily and in a short time.

Brief Description of the Drawings

[0016]

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Figure 16

Best Mode for Carrying Out the Invention

[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited to the contents described in the following embodiments and examples. In addition, the constituent elements in the following embodiments and examples include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those within the so-called equivalent range. Furthermore, the constituent elements disclosed in the following embodiments and examples may be combined as appropriate or selected and used as appropriate.

[0018] An example of the overall configuration of a boiler 10 of a garbage incinerator to which a suspension scaffold 100 according to an embodiment of the present invention is attached is shown in FIG. 1.

[0019] Adjacent to an incinerator (not shown), the boiler 10 for recovering heat from exhaust gas is divided by two deflection portions 12 and 14 that bend the flow path of the exhaust gas, and includes a first radiation chamber 20, a second radiation chamber 22, and a convection heat transfer chamber 30 from the upstream side in the exhaust gas flow direction. The exhaust gas introduced from the incinerator flows upward from below the first radiation chamber 20, downward from above the second radiation chamber 22, and upward from below the convection heat transfer chamber 30.

[0020] The first radiation chamber 20 and the second radiation chamber 22 each include a radiation heat transfer surface that generates steam by receiving radiant heat from the exhaust gas.

[0021] The convection heat transfer chamber 30 includes, for example, a screen tube 32, a horizontal evaporation tube 34, a secondary superheater 36, a primary superheater 38, and an economizer 40 from the upstream side in the exhaust gas flow direction. The secondary superheater 36 and the primary superheater 38 each include a heat transfer tube group in which a plurality of heat transfer tubes arranged horizontally are provided in multiple stages in the height direction, and the heat transfer tube group constitutes a convection heat transfer surface, and steam is generated and further superheated by heat exchange with the exhaust gas. The screen tube 32 is provided with heat transfer tubes in a flag shape to cool the exhaust gas introduced into the convection heat transfer chamber 30. The horizontal evaporation tube 34 is a heat transfer tube that heats the water heated by the economizer 40 to generate steam.

[0022] As shown in FIG. 1, the pedestal 110 for installing the suspension scaffold 100 according to the present invention is installed above, for example, the oval ceiling opening 21 (see FIG. 11(A) to be described later) of the first radiation chamber 20.

[0023] As shown in FIGS. 2 to 4 and FIGS. 5(A) plan view, (B) front view, and (C) side view, the pedestal 110 according to an embodiment of the present invention includes, for example, two-column ladder-shaped posts 140 vertically arranged in the radiation chamber 20 that can be inserted from the ceiling opening 21 of the ceiling 20C of the first radiation chamber (hereinafter simply referred to as the radiation chamber) 20, a base unit 150 (see FIG. 6 to be described later) that can move up and down along the posts 140, four brackets 180 (see FIG. 7 to be described later) that are attached to the base unit 150 in a folded state and can be deployed in the direction of the ladder side surface of the posts 140 (the left-right direction in FIGS. 5(A) and (B)), a front wall abutting unit 190 (see FIGS. 8 and 12(B) to be described later) that is attached to the base unit 150 and has a tip roller 192 abutting against the front wall 20A in the front direction of the ladder, a floor support fitting 210 (see FIGS. 9 and 13(B) and (C) to be described later) that is attached to the upper end of the folded bracket 180, a pair of front and rear long-side floor panels (hereinafter simply referred to as floor panels) 220 (see FIG. 14 to be described later) whose lower end in the folded state is attached to the floor support fitting 210, an end side wall abutting unit 240 that is attached to both ends of the floor panel 220 and has a tip roller 242 abutting against the side wall 20B in the ladder side surface direction when the floor panel 220 is deployed, an end front wall abutting unit 250 that is also attached to both ends of the floor panel 220 and has a tip roller 252 abutting against the front wall 20A, and a stopper pin 260 (see FIGS. 7 and 16(C) to be described later) that is inserted into a diagonal member 184 portion of the bracket 180 for deploying the bracket 180 and the floor panel 220 in the radiation chamber 20.

[0024] The gantry 110 includes, for example, a beam member 112, a building frame 114, three upper and lower connecting members 116 connecting the building frame 114, a slide base frame 118 for making the building frame 114 movable in the left - right direction in FIG. 5(C), a base rail member 120 disposed on the ceiling 20C of the radiation chamber 20 for sliding the slide base frame 118, an auxiliary beam member 122 disposed above the beam member 112, a gantry bracket 124 disposed on the auxiliary beam member 122, a cord reel 126 disposed on the gantry bracket 124 to prevent the power cable from the control panel unit 166 of the base unit 150 from being wound into the ceiling 20C and to prevent the slack power cable from being wound around the drive shaft when the scaffold rises, a winch unit 128 for assembling the posts 140 disposed on the building frame 114, and a hanging jig 130 for hanging the posts 140.

[0025] The post 140 can be extended inward in the radiation chamber (downward in the figure) by a post connecting pin 142. A rack 144 meshing with the pinion gear 158 (see FIG. 6) of the base unit 150 is provided on the side surface of the post 140.

[0026] The base unit 150 includes a base 152, a motor base 154, a lifting motor 156, a pinion gear 158, rollers 160 rolling on the post 140, a bracket mounting fitting 162, and a limit switch 164 for stopping the lifting motor 156 when it is turned on and restricting the lower limit position of the base unit 150, as shown in detail in FIGS. 6(A) plan view, (B) front view, and (C) side view.

[0027] The bracket 180 includes a horizontal member 182 constituting a horizontal portion, which is a double - cylindrical sleeve and is adjustable in length, a diagonal member 184 constituting a diagonal member portion, which is also a double - cylindrical sleeve and is adjustable in length, and a stopper pin 260 inserted into the diagonal member 184, as shown in detail in FIG. 7.

[0028] The length of the horizontal member 182 of this bracket 180 is made variable using a double cylindrical sleeve, and the distance to the side wall 20B when deployed can be adjusted by B.

[0029] As shown in detail in the plan view of FIG. 8(A) and the front view of FIG. 8(B), the front wall abutting unit 190 includes a tip roller 192, a horizontal member 194 whose length can be adjusted using a double cylindrical sleeve, a long hole 194B formed in its inner cylinder 194A, a bolt 196 inserted into the outer cylinder 194C of the horizontal member 194, a hook 198 for hooking on the ladder of the post 140, and a deck 200 available for workers.

[0030] The length of the horizontal member 194 of this front wall abutting unit 190 is made variable using a double cylindrical sleeve, and the distance to the front wall 20A when deployed can be adjusted by A.

[0031] As shown in detail in the plan view of FIG. 9(A), the front view of FIG. 9(B), and the side view of FIG. 9(C), the floor support fitting 210 includes a substantially L-shaped main body 212, a receiving fitting 214, a floor panel fixing pin 216, and a stopper pin 218.

[0032] In FIG. 5, 166 is a control panel unit attached to the base unit 150, 300 is a sill, and 310 is a handrail.

[0033] Hereinafter, the installation procedure will be described with reference to FIGS. 12 to 16 according to the flowchart shown in FIG. 10. Note that in FIGS. 12 to 16, the front view of the ladder constituting the post 140 is the front view 5(B) of the previous figure, and the side view of the ladder is the front views 12(B) to 16(B). Note that the directions are different by 90°.

[0034] First, in step S1000, a gantry 110 is installed on the ceiling opening 21 of the radiation chamber 20. If the gantry 110 is permanently installed, step S1000 is unnecessary.

[0035] Next, in step S1010, for example, a two-pillar ladder-type post 140 with a unit length of about 1.5 meters is carried into the radiation chamber 20, which is a hollow structure, and assembled. Specifically, the post 140 is extended downward while repeatedly connecting with the post connection pin 142.

[0036] Next, proceed to step S1020, and install the base unit 150 on the post 140.

[0037] Next, proceed to step S1030. As shown in FIG. 11, attach the folded bracket 180 to the base unit 150.

[0038] Next, in step S1040, rotate the lifting motor 156 of the base unit 150 equipped with a pinion gear 158 (see FIG. 6) that meshes with the rack 144 formed on one side of the post 140, and lower the base unit 150 to a predetermined position within the radiation chamber 20.

[0039] Next, proceed to step S1050. As shown in FIG. 12, attach the front wall abutting unit 190 and bring its tip roller 192 into contact with the front wall 20A of the radiation chamber 20. At this time, the length of the horizontal member 194 of the front wall abutting unit 190 can be adjusted by a sleeve or the like according to the distance from the wall surface of the front wall 20A.

[0040] Next, proceed to step S1060. As shown in FIG. 13, attach the floor support fitting 210 shown in FIG. 9 to the upper end of the folded bracket 180.

[0041] Next, proceed to step S1070. As shown in FIG. 14, attach a pair of front and rear floor panels 220 in a folded state, suspended by a rope 222, to the floor support fitting 210.

[0042] Next, proceed to step S1080. As shown in FIG. 15, at both ends of the floor panel 220 during deployment (the lower ends in FIGS. 15(B) and 15(C)), an end side wall abutting unit 240 provided with a tip roller 242 that abuts against the side wall 20B and an end front wall abutting unit 250 provided with a tip roller 252 that abuts against the front wall 20A are attached. Since there is the front wall abutting unit 190, it is also possible to omit the end front wall abutting unit 250.

[0043] Next, proceed to step S1090. As shown in FIG. 16, by pulling out the stopper pin 260 disposed on the diagonal member 184 of the bracket 180 and gradually lowering the rope 222, the bracket 180 and the floor panel 220 are deployed. As shown in FIG. 16(C), the tip roller 242 of the end side wall abutting unit 240 is brought into contact with the side wall 20B. At this time, as shown in FIG. 16(B), the tip roller 252 of the end front wall abutting unit 250 is also brought into contact with the front wall 20A. After the deployment is completed, the stopper pin 260 is inserted again into the diagonal member 184 of the bracket 180 to fix the deployed state.

[0044] Here, since the horizontal member 182 of the bracket 180 is made telescopic using a sleeve or the like, the horizontal length of the bracket 180 can be adjusted according to the distance from the side wall 20B.

[0045] Next, proceed to step S1100 and attach the short-side floor panel 230.

[0046] Next, proceed to step S1110 and attach the handrail 310.

[0047] Next, proceed to step S1120, attach the skirting 300, and finish the installation work.

[0048] In this embodiment, since the end front wall abutting unit 250 is provided in addition to the end side wall abutting unit 240, the bracket 180 can be reliably supported.

[0049] Also, in the present embodiment, since the bracket 180 is attached to the base unit 150 on the post 140 above the radiation chamber 20 and then the base unit 150 is lowered into the radiation chamber 20, the work is easy. It is also possible to first lower only the base unit 150 and then attach the bracket 180 to the base unit 150 inside the radiation chamber 20.

[0050] In the above embodiment, the shape of the ceiling opening 21 was a long hole, but the shape of the ceiling opening 21 is not limited to this, and for example, it may be rectangular.

[0051] Also, the number of rollers of the tip rollers 192, 242, 252 of the wall contact units 190, 240, 250 is not limited to one of the tip rollers 192 or two of the tip rollers 242, 252.

[0052] In the above embodiment, the case where the present invention is applied to the radiation chamber of the boiler of the garbage incinerator has been described, but the application target of the present invention is not limited to this, and it can be applied to other hollow structures of the boiler, silos, coke ovens, and incinerators in general.

Explanation of Reference Numerals

[0053] 10…Boiler 20…Radiation chamber 20A…Front wall 20B…Side wall 20C…Ceiling 21…Ceiling opening 100…Suspension scaffold 110…Gantry 130…Suspension jig 140…Post 142…Post connection pin 144…Rack 150…Base unit 156…Lifting motor 158…Pinion gear 162…Bracket mounting fitting 180…Bracket 182…Horizontal member 190…Front wall contact unit 192…Tip roller 194…Horizontal member 200…Deck 204…Floor panel fixing pin 210…Floor support fitting 216…Floor panel fixing pin 220…(For long side) Floor panel 222…Rope 230…Floor panel for short side 240…End side wall contact unit 242…Tip roller 250…End front wall contact unit 252…Tip roller 260…Stopper pin 300…Sill 310…Handrail

Claims

1. A gantry above the hollow structure, Two-column ladder-type posts attached to the gantry and vertically arranged within the hollow structure, which can be inserted through the ceiling opening of the hollow structure, A base unit movable up and down along the posts, A bracket attached to the base unit in a folded state and deployable in the direction of the ladder side of the post, A front wall abutting unit attached to the base unit with its tip abutting against the front wall in the front direction of the ladder in the hollow structure, A floor support fitting attached to the upper end of the bracket in a folded state, A floor panel attached to the floor support fitting in a folded state, An end side wall abutting unit attached to the end of the floor panel and abutting against the side wall in the ladder side direction of the hollow structure when the floor panel is deployed, Means for deploying the bracket and the floor panel within the hollow structure, A suspended scaffold characterized by comprising the above.

2. The suspended scaffold according to claim 1, characterized in that an end front wall abutting unit that abuts against the front wall when deployed is provided at the end of the floor panel.

3. The suspended scaffold according to claim 1, characterized in that the means for deploying the bracket and the floor panel is a stopper pin inserted into the diagonal member of the bracket.

4. The suspended scaffold according to claim 1, characterized in that the length of the horizontal part of the front wall abutting unit is variable and the distance to the front wall is adjustable.

5. The suspended scaffold according to claim 1, characterized in that a deck is provided on the front wall abutting unit.

6. The suspended scaffold according to claim 1, characterized in that the length of the horizontal part of the bracket when deployed is variable and the distance to the side wall is adjustable.

7. A method of installing the suspended scaffold according to any one of claims 1 to 6 within a hollow structure, comprising: Carrying the post into the hollow structure through the ceiling opening of the hollow structure using the gantry above the hollow structure; Installing a base unit on the post; Attaching the bracket in a folded state to the base unit; Attaching the front wall abutting unit to the base unit and bringing its tip into contact with the front wall of the hollow structure. The step of attaching a floor support fitting to the upper end of the bracket in the folded state; The step of attaching the floor panel in the folded state to the floor support fitting; The step of attaching an end side wall abutting unit that abuts against the side wall of the hollow structure when the floor panel is deployed to the end of the floor panel; The step of pulling out a stopper pin attached to the bracket within the hollow structure, deploying the bracket and the floor panel, and bringing the end side wall abutting unit into contact with the side wall; A method for installing a suspended scaffold, characterized by comprising the above steps.

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