JP6409353B2 - Suspended scaffold and installation method using the same - Google Patents

Description

  The present invention relates to a suspended scaffolding that serves as a scaffold for installing equipment in a small room surrounded by concrete, and an installation method using the same.

In buildings such as nuclear power plants, equipment, piping, ducts, and cable trays are installed in small rooms surrounded by concrete walls.
Conventionally, there is a post-installation method as a construction method for such a building. In this method, a floor and a wall are first formed, and then a scaffold for ceiling construction is installed. After the ceiling is constructed using the ceiling construction scaffolding, installation work such as hoists installed on the ceiling, and wall finishing work are performed. Next, the ceiling construction scaffold is removed and floor coating is performed. And equipment equipment, piping, a support member, etc. installed in a small room are carried in from the passage opening of a wall. In addition, installation equipment scaffolds are installed and equipment, piping, ducts, etc. are installed while repeating removal several times.

In such a post-installation method, the work period is prolonged due to the reassembly of the scaffold for installation work, and work at high places frequently occurs. For this reason, a first-in method using a module structure in which a part of equipment is temporarily assembled is applied.
The module structure disclosed in Patent Literature 1 is capable of suspending equipment parts arranged in a small room, and includes a suspension unit whose length is adjusted in accordance with the design arrangement position in the small room. Thus, the floor surface of the small room can be lifted, and the floor surface can be easily painted.

JP 2012-207430 A

  However, according to the module structure as disclosed in Patent Document 1, since the construction equipment parts are raised from the floor surface, the floor surface can be painted. However, a suspension means is used on the module structure in advance. As a result, the work of temporarily assembling the equipment as designed was complicated. In addition, the module structure in which a plurality of facility devices are temporarily assembled has increased in weight and is difficult to handle because a large crane is required.

When performing installation work in such a building, a suspension scaffold is placed on the entire surface of the room, and it is applied as a scaffold for installation while ensuring the passage of the floor so that equipment can be carried into the room. It is desirable to be able to do it.
However, in overseas construction sites, it is mainstream to use a main scaffold that is constructed of a frame and a floorboard from the floor surface, and the number of highly skilled workers who assemble a suspended scaffold over a room in a high place is limited. ing. For this reason, in the overseas construction work, this assembly scaffold was assembled excessively, and the passage of the floor surface could not be secured, and there was a possibility that cases that would hinder the carrying-in work occurred frequently.

  In view of the above-described problems of the prior art, the present invention provides a suspension scaffold that facilitates the carrying-in work of equipment into a small room and does not require repeated removal and installation of a mounting scaffold, and an installation method using the suspension scaffold. The purpose is to do.

In the present invention, as a first means for solving the above-described problem, a column disposed in a position substantially overlapping the ceiling beam in a plan view of the small room and a support disposed so as to straddle the plurality of columns are temporarily assembled. Construction of a frame, a scaffold for installation work that can be installed on the frame at a height position where equipment equipment can be carried in on the floor side of the small room, and for installation work of the equipment equipment, and a ceiling of the small room The ceiling construction scaffolding and the wall finishing scaffold for performing the finishing work on the wall surface of the small room are carried into the small room on which the floor surface and the wall surface are formed and the ceiling is constructed. A grip portion for gripping the flange of the ceiling beam of the ceiling, a flange portion of the first cylinder that can be connected to the flange of the column at the other end, and an axial center of the first cylinder that is rotatable about the axis Scaffolding support having a second cylinder threadably engaged with the shaft Connect over bets a pillar of the frame, the ceiling beams and the grip, the ceiling beams of the frame by connecting the flange of said post is moved up and down the second cylindrical body at the flange portion by the grasping portion A suspension scaffold formed by removing a part of the frame, the ceiling construction scaffold, the wall finishing scaffold ,
The suspension scaffold is to provide a suspension scaffold including the frame, the scaffold support, and the installation work scaffold .

  According to the present invention, as a second means for solving the above-described problem, in the first means, the scaffold support is disposed on an axis of the first cylinder and the axis of the first cylinder and around the axis. It is another object of the present invention to provide a suspended scaffold comprising a second cylinder threadably engaged with a rotatable shaft, wherein the second cylinder body is extendable and contractible in the axial direction from the first cylinder body.

  In order to solve the above-mentioned problems, the present invention provides a ceiling construction in which the first means and the second means are attached to the frame, are carried together with the frame from the ceiling side, and are removed after the ceiling construction. An object of the present invention is to provide a suspended scaffold comprising: a scaffold, and a wall finishing scaffold that is attached to the frame, is carried together with the frame from the ceiling side, and is removed after wall finishing of the small room.

As a fourth means for solving the above problems, the present invention provides a floor surface and a wall surface of a structure in which a ceiling construction scaffold, a wall finishing scaffold, and a scaffold for installation work are detachably assembled to a frame. A step of carrying into the small room formed with, a step of constructing the ceiling of the small room with the ceiling construction scaffold, and a horizontal or vertical direction with respect to the ceiling beam attached to the ceiling beam after the ceiling construction A step of connecting a scaffolding support capable of adjusting the mounting position to the pillar of the frame and finishing the wall with the wall finishing scaffold, the ceiling construction scaffold, the wall finishing scaffold, and disassembling a part of the frame And forming a suspension scaffold in which the installation work scaffold is suspended from the ceiling beam, and carrying a facility device into the small room and installing it from the installation work scaffold. Using a hanging scaffold To provide a mounting method.

  According to the configuration as described above, the suspension scaffold is installed at the height position of the frame where the equipment can be carried in, so that the passage on the floor surface side can be secured and the equipment is installed in the small room. Equipment can be carried in easily. In addition, the facility equipment can be temporarily placed or installed using the suspended scaffold as the main scaffold, and there is no need to repeat the removal and installation of the scaffold as in the prior art. In addition, it is possible to attach a suspension scaffold by easily suspending a pillar of a frame that is arranged in advance so as to overlap with the ceiling beam in plan view of the small room from a ceiling beam using a scaffolding support that can be adjusted in the horizontal direction. .

  According to the above configuration, it is possible to easily align the scaffold support and the frame in the vertical direction (eliminate the vertical gap).

  According to the above configuration, since the scaffolding for ceiling construction and wall finishing is installed in the frame in advance when the suspended scaffolding is carried into the small room, it is necessary to install the scaffolding during ceiling construction and wall finishing. The work process can be shortened.

  According to the above configuration, since the passage on the floor surface side can be ensured, and the passage property cannot be ensured as in the conventional module structure, the equipment parts are suspended in advance such as wire suspension before carrying in. There is no need for troublesome work that must be temporarily assembled using the, and the carry-in work and the scaffold removal work can be easily performed.

It is a perspective view which shows the outline of the suspension scaffold of this invention. It is a top view of the suspension scaffold of this invention. It is a front view of a scaffolding support. It is a side view of scaffold support. It is a partial cross section figure of the front of the scaffold support except a connection means. It is explanatory drawing of the installation method using the suspension scaffold of this invention.

  Embodiments of a suspended scaffold and an installation method using the same according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing an outline of a suspended scaffold according to the present invention. FIG. 2 is a plan view of the suspension scaffold of the present invention. FIG. 3 is a front view of the scaffold support. FIG. 4 is a side view of the scaffold support. FIG. 5 is a partial cross-sectional view of the front of the scaffolding support excluding the connecting means. FIG. 6 is an explanatory view of an installation method using the suspension scaffold of the present invention.

[Suspended scaffold 10]
The suspended scaffold 10 of the present invention is incorporated in a structure applicable to a so-called first-in method among construction methods. Moreover, the application object of the suspension scaffold 10 of the present invention is a building that is surrounded by a concrete wall and has a small room in which equipment, piping, ducts, and cable trays are installed, and a space-saving internal space. The structure 11 is a substantially rectangular parallelepiped that can be carried from a ceiling side by a crane or the like into a small room in which a concrete floor surface 12 and a wall surface 14 are formed and a ceiling is not formed by temporarily assembling a plurality of frames and scaffolds. The form is adopted. In the structure 11 that has been carried in, the leg portions of the columns constituting the frame are arranged on the floor surface 12, and a gap of a predetermined interval is provided between the wall surface 14 and the frame. Such a structure 11 can carry out operations such as ceiling construction and wall finishing using a pre-assembled scaffold without temporarily assembling the scaffold after being brought into the small room.

  The suspended scaffold 10 of the present invention has a frame 20, a scaffold 30 for installation work, a scaffold support 40, a ceiling construction scaffold 60, a wall finishing scaffold 70, a ladder 80, and a handrail 82 as main components. .

[Frame 20]
The frame 20 corresponds to the skeleton part of the structure 11 or the suspended scaffold 10. The frame 20 includes a pillar 22 and a support 24, and is assembled using a connecting fitting (not shown) that can be easily attached and detached. The support 24 is attached in the horizontal direction so as to straddle the plurality of pillars 22, and the mechanical strength of the frame 20 can be increased. As shown in FIG. 2, a plurality of ceiling beams 18 are formed in parallel at predetermined intervals on the ceiling 16 of the small room. The pillar 22 of the present invention is disposed at a position that substantially overlaps the ceiling beam 18 of the ceiling 16 in plan view of the small room. Further, a flange 23 (see FIGS. 3 to 4) that can be connected to a flange portion 55 of a scaffolding support 40 described later is formed at the upper end of the column 22.

[Scaffolding 30 for installation work]
The installation work scaffold 30 is a scaffold for performing installation work of equipment. A part of the equipment such as the piping 90 is temporarily placed in the installation work scaffold 30 in advance. The installation work scaffold 30 according to the present invention is attached to a pillar 22 at a height position capable of carrying in from the passage opening 13 of the floor 12. As shown in FIG. 2, the installation work scaffold 30 has divided scaffold plates arranged over the entire plane except for the installation openings 30 a, the ladder openings 30 b, and the pillars 22 in the plan view of the small room. Is formed. A part of the equipment, that is, the pipe 90 in this embodiment is temporarily placed on the installation work scaffold 30. Such an installation work scaffold 30 is not removed when the ceiling installation scaffold 60 and the wall finishing scaffold 70 described later are removed, and can be used for the subsequent installation work of equipment. Further, a new installation work scaffold can be temporarily assembled using the installation work scaffold 30 by the work process.

[Scaffold support 40]
As shown in FIGS. 3 to 5, the scaffold support 40 has a connecting unit 42, a first cylinder 45, and a second cylinder 53 as main basic configurations.

  The connecting means 42 is a pair of connecting metal fittings in which a grip part 43 that grips both ends of the flange 19 (floor surface side) of the ceiling beam 18 (H-shaped steel) is formed on the upper part and a clamp 44 that grips the pipe 41 is formed on the lower part. is there. In addition, the pipe 41 is arranged in a direction orthogonal to the longitudinal direction of the ceiling beam 18 and is set slightly longer than the length of the flange 19. As an example, the gripping portion 43 of the present embodiment uses a C-type clamp that can grip the end of the flange 19. Such a gripping portion 43 can be fixed by tightening a fastening bolt 431 in the thickness direction of the flange 19 from the ceiling side after inserting the end portion of the flange 19 into the recess. In addition, as an example, the clamp 44 of the present embodiment uses a pipe clamp having an inner diameter substantially the same as the diameter of the pipe 41. In such a clamp 44, a pair of semicircular members, one end of which is rotatably coupled in a hinge shape, are attached along the radial direction of the pipe 41, and then the other ends are tightened with a fastening bolt 441. 41 can be fixed. In the connection means 42 having such a configuration, a pipe 41 having a predetermined length is communicated with each clamp 44 of a pair of connection fittings. Then, the flange 19 of the ceiling beam 18 is gripped by each gripping portion 43.

  A flange 46 is formed at one end (upper end) of the first cylinder 45, and a clamp portion 47 is formed at the flange 46. The clamp portion 47 is a pipe clamp that holds the pipe 41. Such a clamp portion 47 is formed by attaching a pair of semicircular members, one end of which is rotatably coupled in a hinge shape, along the radial direction of the pipe 41, and then fastening the other ends with a fastening bolt 471. It can be fixed to the pipe 41. A first shaft 48 is attached inside the first cylinder 45 (see FIG. 5). The axis of the first shaft 48 is arranged at the same center as the axis of the first cylinder 45. The head 49 of the first shaft 48 is rotatably supported by a thrust bearing including a ball bearing 451 and a bearing receiver 452 inside the first cylinder 45. A bevel gear is formed on the outer periphery of the head 49. An end of the first shaft 48 opposite to the head 49 protrudes from the other end (lower end) of the first shaft 48, and a male screw 50 is formed on the surface of the shaft body. The second shaft 51 is attached so that the axis extends from the opening 45 a formed in the peripheral surface of the first cylinder 45 in a direction orthogonal to the axis of the first shaft 48. A bevel gear is formed on the outer periphery of the head 52 of the second shaft 51 in the same manner as the head 49 of the first shaft 48, and can rotate while meshing with each other. The shaft body of the second shaft 51 is formed in a hexagonal shape in cross-sectional view. The second shaft 51 having such a configuration can be easily rotated forward and backward using a tool such as an impact wrench.

  The second cylinder 53 is smaller in diameter than the first cylinder 45 and can be inserted into the first cylinder 45, and an internal thread portion 54 that is screwed into the external thread 50 is formed inside one end (upper end). Has been. At the other end of the second cylinder 53, a ball bearing including a ball bearing 531 and a bearing receiver 532 is formed in an annular shape on the inner wall. The flange portion 55 is provided with a flange inner tube 56 that can be inserted into the second tube body 53. The flange inner cylinder is provided with a flange at the tip, and is supported by a ball bearing so as to be rotatable about its axis. The flange portion 55 is formed in the same shape as the flange 23 formed at the upper end of the column 22, and can be connected using a fastening bolt 551.

  In the scaffold support 40 having such a configuration, the clamp 44 of the connecting means 42 and the clamp portion 47 of the first cylinder 45 are temporarily fixed to the pipe 41 in advance. Then, the grip portions 43 of the pair of connecting means 42 are temporarily fixed to both ends of the flange 19. Next, the flange portion 55 of the second cylindrical body 53 is connected to the flange 23 of the column 22 using a fastening bolt 551. The frame 20 can be connected and fixed to the ceiling beam 18 by rotating the second shaft 51 using a tool such as an impact wrench to move the second cylinder 53 upward or downward.

[Casting scaffold 60]
The ceiling construction scaffold 60 is a scaffold used when constructing the ceiling 16, and is a scaffold formed on the uppermost stage of the structure 11. The ceiling construction scaffold 60 is formed by arranging divided scaffold plates over the entire surface of the frame 20 in a plan view of a small room.

[Wall finishing scaffolding 70]
The wall finishing scaffold 70 is a scaffold used when finishing the wall surface 14, and is a scaffold formed on the floor structure 11 lower than the ceiling construction scaffold 60. The wall finishing scaffold 70 need only be formed on the four wall surfaces 14 in plan view of the small room, and no scaffolding plate is attached to the center side.

  As an example, when the ceiling 16 is 7 to 8 m from the floor 12, the wall finishing scaffold 70 of this embodiment is attached in two steps to the height of 2 m and 4 m from the floor 12. It is also possible to form three or more levels according to the labor rules according to the height of the ceiling 16 of the small room.

[Ladder 80]
The ladder 80 is formed from the floor surface 12 of the small room to the scaffolding of each floor.

[Handrail 82]
The handrail 82 is formed around the opening of the wall finishing scaffold 70 or around the opening for installation of the equipment formed on the installation work scaffold 30.
Such a suspended scaffold 10 is temporarily assembled using a detachable connecting means, and is removed after the installation work of the equipment is completed.

[Installation method using hanging scaffold]
A method for installing the equipment using the suspension scaffold of the present invention having the above-described configuration will be described below.

  The structure 11 is carried into a small room in which the concrete floor 12 and wall 14 are formed and the ceiling 16 is not formed (A). The structure 11 includes a frame 20, a ceiling construction scaffold 60, a wall finishing scaffold 70, an installation work scaffold 30, a ladder 80, and a handrail 82. Before the structure 11 is carried into the small room, a ceiling construction scaffold 60, a wall finishing scaffold 70, and an installation work scaffold 30 are temporarily assembled in the frame 20, and a pipe 90 is attached to the installation work scaffold 30. Temporary storage equipment such as. Further, a passage port 13 for carrying in equipment is formed on the floor 12 side of the small room. In the structure 11 carried into the small room, the legs of the pillars 22 are installed on the floor 12, and a ladder 80 is attached from the floor 12 toward the ceiling 16. The ceiling construction scaffold 60 is attached over the entire surface in a plan view of the small room. The wall finishing scaffold 70 is formed in an annular shape along the wall surface 14 in plan view of the small room. A handrail 82 is attached to the center side of the wall finishing scaffold 70.

  The ceiling 16 is constructed from the ceiling construction scaffold 60 of the structure 11 (B). For example, when the ceiling 16 is 7 to 8 m from the floor 12, the ceiling construction scaffold 60 is attached to a height of 5 to 6 m from the floor 12. In addition, after the ceiling 16 is formed, finishing work such as painting of the ceiling 16 from the ceiling construction scaffold 60 is performed. Furthermore, installation work, such as a hoist attached to the ceiling 16, is performed. Thus, since the ceiling construction scaffold 60 is temporarily assembled in the structure 11, the ceiling construction work can be performed promptly after being carried in.

  Next, the scaffold support 40 is attached using the ceiling construction scaffold 60, and the finishing work of the wall surface 14 is performed using the wall finishing scaffold 70 (C). The scaffold support 40 is attached from the ceiling construction scaffold 60. The scaffold support 40 temporarily secures the clamp 44 of the connecting means 42 and the clamp portion 47 of the first cylinder 45 to the pipe 41 in advance.

  First, the grip 43 of the connecting means 42 is attached to the ceiling beam 18 of the ceiling 16. After the end of the flange 19 is inserted into the concave portion of the grip portion 43, the tightening bolt 431 is tightened in the thickness direction of the flange 19 from the ceiling side to temporarily fix the grip portion 43 to the flange 19. Next, the flange portion 55 of the second cylindrical body 53 is connected to the flange 23 of the column 22 using a fastening bolt 551. At this time, the gripping position of the flange 19 by the gripping portion 43 of the connecting means 42 and the gripping position of the clamp portion 47 that grips the pipe 41 are adjusted according to the column 22. After such horizontal position adjustment is completed, the second shaft 51 is rotated using a tool such as an impact wrench to move the second cylindrical body 53 upward or downward to adjust the vertical position. Thereby, the frame 20 can be connected and fixed to the ceiling beam 18.

For wall finishing, the wall 14 is painted using the wall finishing scaffold 70. As an example, when the ceiling 16 is 7 to 8 m from the floor 12, the wall finishing scaffold 70 is attached at a height of 2 m and 4 m from the floor 12.
After the wall finishing work is completed, the ceiling construction scaffold 60, the wall finishing scaffold 70, and a part of the frame 20 are removed to form the suspended scaffold 10 (D). The suspended scaffolding 10 is a height at which the equipment on the floor 12 side can be carried in. For example, when the ceiling 16 of the small room is 7 to 8 m from the floor 12, the frame at a height of 3 to 3 m from the floor 12 is used. An installation work scaffold 30 is attached to 20.

The equipment 92 is carried into the small room from the passage opening 13 on the floor 12 side (E). On the floor 12 side, the frame 20 of the structure 11 is removed, and the installation work scaffold 30 of the suspension scaffold 10 is also installed at a height that allows the carry-in work, so that the equipment 92 can be easily placed in the small room. Can be brought in.
The installation work of the equipment 92 is performed using the installation work scaffold 30 (F). After the installation work is completed, the suspension scaffold 10 is removed.

  According to the suspension scaffold of the present invention and the installation method using the same, since the suspension scaffold is installed at the height position of the frame where the equipment can be carried in, the passage on the floor surface side is ensured. The equipment can be easily carried into the small room. In addition, temporary installation or installation work of equipment can be performed using the suspension scaffold as the main scaffold, and it is not necessary to repeat the removal and installation work of the scaffold according to the construction work of the building as in the past. In addition, the pillar of the frame provided in the vicinity of the ceiling beam in plan view in advance can be easily suspended from the ceiling beam by a scaffolding support whose position can be adjusted in the horizontal direction and the vertical direction.

  The suspension scaffold and the installation method using the same according to the present invention are particularly useful for a first-in method of a building in which a concrete wall is formed.

10 ......... Suspended scaffolding, 11 ......... Structure, 12 ......... Floor surface, 13 ......... Aisle port, 14 ......... Wall surface, 16 ......... Ceiling, 18 ......... Ceiling beam, 19 ... ... Flange, 20 ......... Frame, 22 ......... Pillar, 23 ......... Flange, 24 ......... Support, 30 ......... Installation scaffolding, 40 ......... Scaffold support, 41 ......... Pipe, 42 ..... Connecting means, 43 ..... Holding part, 44 ..... Clamp, 45 .... 1st cylinder, 46 .... Flange, 47 ....... Clamping part, 48 ........ 1st shaft, 49 ......... Head, 50 ...... Male thread, 51 ......... Second shaft, 52 ......... Head, 53 ......... Second cylinder, 54 ......... Female thread, 55 ......... Flange, 56 ... …… Flange inner cylinder, 60 ………… Casting scaffolding, 70 ……… Wall finishing scaffolding, 80 ……… Ladder, 82 …… Handrail, 90 ......... piping, 92 ......... equipment.

Claims (2)

A work frame can be carried in on the floor side of the small room, with a frame that is temporarily assembled with a pillar that is placed almost overlapping the ceiling beam in plan view of the small room, and a support that is placed across the multiple pillars. An installation work scaffold that can be attached to the frame at a certain height to perform installation work of the equipment, a ceiling construction scaffold that constructs the ceiling of the small room, and a wall that performs finishing work on the wall surface of the small room A structure having a finishing scaffold is carried into the small room formed with a floor and a wall surface, a ceiling is constructed, a gripping part for gripping a flange of the ceiling beam of the ceiling at one end, and the pillar at the other end flange and the flange portion of the first tubular member connectable for, the pillars of said frame scaffold support having a second cylindrical body screwed a rotatable shaft about an axis disposed in the axial center of the first cylindrical body connected to the ceiling by the gripper And connecting the flange of the pillar at the flange portion to move the second cylinder up and down to connect the frame to the ceiling beam, the ceiling construction scaffold, and the wall finishing scaffold, A suspension scaffold formed by removing a part of the frame ,
The suspended scaffold includes the frame, the scaffold support, and the installation work scaffold. A step of carrying a structure in which a scaffold for ceiling construction, a scaffold for wall finishing, and a scaffold for installation work are detachably assembled to a frame into a small room formed with a floor and a wall;
A step of constructing the ceiling of the small room with the ceiling construction scaffold;
Connecting a scaffolding support attached to the ceiling beam after the ceiling construction and adjusting the horizontal or vertical mounting position with respect to the ceiling beam to the pillar of the frame, and finishing the wall with the wall finishing scaffold;
A step of disassembling a part of the frame to form a suspended scaffold in which the installation work scaffold is suspended from the ceiling beam, the ceiling construction scaffold, the wall finishing scaffold,
A step of bringing equipment into the small room and installing it from the scaffold for installation work;
The installation method using the suspension scaffold characterized by having.

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