JPH07119519B2 - Scaffolding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is configured by using a portal frame in which a pedestal is configured to be capable of being bent in the center, and is used, for example, in a high pressure steam generating boiler of a thermal power plant. The present invention relates to a scaffolding device that can be constructed even under a special condition in which a wire for hoisting or hanging is hung through a narrow hanging space.

[Conventional technology]

For example, in a high-pressure steam generation boiler of a thermal power plant, slag generated by combustion of fuel adheres to the inner wall surface during operation.
Work to remove the slag is performed regularly.

In order to carry out such boiler scraping work, it is an essential requirement to construct a considerably large-scale scaffolding device in which scaffolding plates are provided in layers along the inner wall surface of the boiler. There is a well-known scaffolding that is traditionally constructed by combining it vertically and horizontally and connecting and fixing it with wire, or a well-known scaffolding device for construction that is constructed by vertically and horizontally connecting and connecting gate frames made of metal pipes. Had been used.

[Problems to be Solved by the Invention]

However, in the case of such a conventional scaffolding device, there is a problem that a large amount of money and a construction period are required for the scaffolding assembling and dismounting work, and a satisfactory response is required for this kind of work which needs to be performed in a limited period. The reality is that nothing can be done.

By the way, in the Japanese Patent Application No. 62-308322, the inventor of the present invention connects two parallel columns at a required interval with a support rod for locking the end of the scaffolding plate, and the upper and lower sides of each column are connected. A joint pin is projectingly provided at one of the ends, an engaging hole into which the joint pin can be inserted and fitted is formed at the other end, and connecting brackets are fixed to the upper and lower ends of the pedestal, respectively. Proposal of pedestal unit for building scaffolding equipment.

In this pedestal unit of the prior art, a plurality of units can be vertically and foldably connected by connecting the connecting brackets at the upper and lower ends of the pedestal of adjacent units in the vertical direction. It is possible to assemble a scaffolding device in which scaffolding boards are arranged in a layered manner by arranging the unit groups connected in parallel with each other in the left-right direction at regular intervals and installing scaffolding boards between the supporting rods of the adjacent units facing each other. It is possible, from the folded state at the work site,
It is possible to construct a three-dimensional scaffolding device at once by simply lifting it with a winch, etc., and when removing it, it has an excellent function that it can be easily disassembled by returning it to its original folded state.

However, in the case of a scaffolding device using the above pedestal unit, a wire for hoisting or hanging swings in the lateral direction (horizontal direction) when hoisting or folding, and particularly for hoisting / hanging. The hanging space of the wire is 5
There is a drawback that it becomes impossible when using a small space of about 10 cm or when hoisting and hanging in a relatively small installation space.

Therefore, the present invention has been made to solve such a problem, and a stanchion can be vertically extended or folded by hoisting / hanging with a winch or the like, and a wire for hoisting or hanging can be moved laterally. It can be lifted vertically without any need, and can be lifted and hung even in a small space.

[Means for Solving the Problems]

In order to achieve the above object, the scaffolding device of the present invention is capable of fitting a joint pin (6b) protruding upward at the upper and lower ends and the joint pin (6b), as shown in the drawings of the embodiment. Pillar (1) with pin fitting holes (6a)
Is divided into two in the length direction, and a joint pin (6b) and a pin fitting hole (6a) which can be fitted to each other are respectively provided at opposite ends of the divided portion, and one side is provided at the opposite end. Secure the joint brackets (7a) and (7b) toward
The tip ends of these joint brackets (7a) (7b) are pivotally attached to each other by a pivot shaft (8), and the joint brackets (7) and (7b) are connected so as to be bendable about the pivot shaft (8). )
And the upper and lower ends thereof are integrally connected to each other by a horizontal support rod (4) for scaffolding plate to form a gate frame (A), and the gate frame ( A) a large number of frames,
In the gate-shaped frames (A) and (A) that are vertically and horizontally adjacent to each other, the scaffolding plate (B) is installed between the horizontal support rods (4) and (4) to connect the two vertically adjacent gates. Form (A)
In (A), the joint brackets (7a) and (7b) are directed toward the opposite side of the joint brackets (7a) and (7b) fixed to the divided parts at the upper and lower ends of the vertically-opposed pedestals (1) and (1). ) Is projected, and the tip portions of these joint brackets (7a) and (7b) are pivotally attached to each other by a pivot shaft (8) so that the upper and lower parts are centered on the pivot shaft (8) in the opposite direction to the upper and lower split portions. Further, the split parts of the pillars (1) of the gate frames (A) and (A), which are connected to each other so as to be bendable and further arranged at the left and right ends of the gate frames (A) and (A) arranged in the left-right direction. Are refracted in mutually opposite directions toward the lower surface side of the scaffolding frame.

Further, in the portal frame having the above-described structure, the horizontal support rod (4) is vertically arranged at least as long as the horizontal distance (x) between the axial center of the horizontal support rod (4) and the bending pivot fulcrum (8) of the pedestal connection joint (5). It is desirable to dispose them at a distance (y) above the bending pivot point (8) of the pedestal connection joint (5).

Further, in the scaffolding device of the present invention configured by using the portal frame having the above-described configuration, the plurality of portal frames (A) ... Are connected to the pedestal through the pedestal connection joints (5). A zigzag-foldable joint is formed at a bending pivot fulcrum (8) between the joint (5) and the intermediate joint (2) of the pedestal (1) to form a ladder-shaped frame body (16), The ladder-shaped frame bodies (16) are made to be bendable in a direction in which the pillars (1) (1) of the portal frame (A) arranged at least on the outermost side are close to each other and paired at regular intervals. The scaffolding plate (B) is installed between the horizontal supporting rods (4) and (4) of the adjacent gate frames (A) and (A).

[Action]

In the portal frame (A) having the above-described structure, both the pillars (1) and (1) are horizontally supported around the pivot of the intermediate joint (2).
It can be folded only in the same direction around the axis of.

Therefore, in a scaffolding device in which a plurality of the gate frames (A) are vertically and horizontally assembled, the pedestal connection joints (5) are sequentially connected and the horizontal support rods () of the gate frames (A). 4) A scaffolding board (B) can be mounted between them, and then can be three-dimensionally constructed simply by lifting with a wire.
At the time of this hoisting, in the gate frames (A) and (A) arranged in the left and right direction, the divided parts of the pillars (1) of the gate frames (A) and (A) arranged at the most both ends are separated. Since they are configured to be bent in mutually opposite directions toward the lower surface side of the scaffolding frame, the pillars (1) of these portal frames (A) and (A) do not project outwardly and can be folded inside. Extends from the inward folded state to the standing state, and when folding for removal, it is folded inward from the upright state,
In either case, the scaffolding device is generally hoisted or hung vertically. Therefore, the scaffolding device has very little horizontal swing, and can stably perform lifting and folding operations using the wire.

Although the pedestal unit of the present invention differs depending on the installation location, it is normally constructed by forming a set of 3 to 5 legs in the lateral direction and 3 to 10 steps in the upper direction and connecting them vertically and horizontally as appropriate. Is convenient for transportation and handling.

Further, the bending and stretching motions of the outermost end pedestals (1) do not exceed the installation bottom width of the scaffolding device, so that there is no hindrance to the construction and removal work in the limited space.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The size of the portal frame (A) for assembled scaffolding according to the present embodiment shown in FIGS. 1 and 2 has the same height and width as conventionally known, and the upper and lower sides are formed to have substantially the same length. Intermediate joint (2) between a pair of metal pipe pedestal members (1a) (1b)
A pair of pedestals (1) and (1) connected via
As shown in the figure, the scaffolding plate (B) is installed at a constant interval wider than the front and rear width, and these front and rear pedestals (1) (1)
A scaffolding plate made of metal pipe that can be divided between the upper pedestal members (1a) (1a) through the fold-shaped stays (3) (3) at approximately equal halves in the longitudinal direction. A support rod (4) is integrally connected to form a gate shape, and further, a pedestal connection joint (5) is provided at the upper and lower ends of both pedestals (1) and (1).
The upper and lower joint parts (5a) and (5b) are integrally attached in a separated state.

FIG. 3 shows a stanchion joint (5). The pedestal connection joint (5) is configured to be bendable only in the same direction around the axis of the horizontal support rod (4).

That is, this pedestal connection joint (5) is connected to the pedestal (1).
At the upper end of the upper pedestal member (1a) of
b), and upper joint parts (5a) are attached to the lower ends of the lower pedestal members (1b), respectively. The lower joint part (5b) is fixed to the upper end of the upper pedestal member (1a) by fitting the joint pin (6b) into the upper part of the upper pedestal member (1a) with the pin head projecting by a predetermined length, and has a U-shaped upper joint bracket. (7
b) is integrally fitted and fixed to the outer periphery of the upper end of the upper pedestal member (1a), and the upper joint part (5a) is formed by opening the lower end of the lower pedestal member (1b). Pin fitting hole (6
The lower joint bracket (7a) having a) and formed symmetrically with the bracket (7b) is fitted and fixed to the outer periphery of the lower end of the lower pedestal member (1b). Both brackets (7a) and (7b) of 5a) and (5b) extend diagonally to each other on one side of the pedestal (1) on the left and right sides, and at the same time, the extending portions are overlapped to form a pivot shaft ( 8) is rotatably and displaceably connected to each other to form a pedestal connection joint (5).

The pedestal connection joint (5) having such a configuration is
As shown by the solid line diagram in the figure, in a state where the upper and lower pedestals (1) (1) connected via the joint (5) are linearly extended, the pin fitting of the upper pedestal (1) is performed. Insert the joint pin (6b) of the lower pedestal (1) into the dowel hole (6a),
The upper and lower end surfaces of both pedestals (1) and (1) are joined. Further, in the state where the both ends of the pedestal (1) (1) are joined, it is impossible to rotate the pivot shaft (8) to the opposite side, so that the joint (5) is indicated by the one-dot chain line in FIG. As shown in the figure, the pedestal (1) (1) can be bent only toward the pivot shaft (8) side.

FIG. 4 shows the intermediate joint (2). The intermediate joint (2) is configured to be bendable around the axis of the horizontal support rod (4) only in the direction opposite to the direction for connecting the pedestal (5), but in the present embodiment, the pedestal connection is made. The same structure as that of the joint (5) is attached in the right and left opposite directions. In the figure, (2a) is the upper joint part attached to the lower end of the upper pedestal member (1a), (2b)
Is a lower joint part attached to the upper end of the lower pillar member (1b). The other components common to the pedestal connection joint (5) are designated by the same reference numerals, and the description thereof will be omitted to avoid duplication.

Denoted at (9) are locking pins for locking the ends of the braces (C), and are provided so as to project inside the upper parts of the upper and lower pedestal members (1a) (1b), respectively.

FIG. 5 shows the rod members (4a) (4b) in front of and behind the horizontal support rod (4).
The connection structure of is shown. One of the rod members (4a) is provided with a pair of shaft portion insertion holes (10a) (10a) and a protrusion insertion hole (10b) which are opposed to each other in the radial direction of the rod member (4a). ,
While allowing the shaft portion (11a) of the connecting pin member (11) formed in a substantially J shape to pass through the shaft portion insertion holes (10a) (10a),
Between the outer surface of the rod member (4a) and the base end of the shaft portion (11a) protruding therefrom, the tip fitting projection (11b) of the connecting pin member (11).
A compression coil spring (12) is attached to urge the projection insertion hole (10b) in the direction of insertion. Further, the other rod member (4b) is welded with a tubular shaft (13) fitted into the one rod member (4a) in a state of protruding from the tip portion, and the connecting pin member is attached to the tip portion of the tubular shaft (13). Notch grooves (14a) (14a) to be engaged with the shaft portion (11a) of (11) and a fitting hole (14b) into which the fitting projection (11b) is projected are provided respectively.

When assembling the portal frame (A), the fitting hole (14) of the connecting pin member (11) mounted on the rod member (4a) on one side is fitted.
b) is substantially withdrawn from the projection insertion hole (10b) against the biasing force of the compression coil spring (12), the other rod member (4
After fitting the cylindrical shaft (13) of (b) into one of the rod members (4a) and engaging the notch grooves (14a) (14a) with the connecting pin member (11 shaft part (11a), Part (11b) is compressed coil spring (1
Projection insertion hole (10b) and fitting hole (14b) due to the urging force of 2)
By inserting the rods, the rod members (4a) (4a
b) can be fixed and connected to each other in a state in which their withdrawal and rotation are restricted, and both rod members (4a) can be operated in the reverse operation.
(4b) can be separated. Therefore, by separating the front and rear rod members (4a) and (4b) in this way, the gate frame (A) can be divided into an inverted L-shape that is easy to handle without being bulky during transportation.

In FIGS. 1 and 2, (15) and (15) are scaffolding plate disengagement plates fixed to the upper surfaces of both end faces of the horizontal support rod (4).

6 and 7 show a scaffolding device in which the portal frame (A) having the above-mentioned structure is assembled. In this scaffolding device, a required number of portal frames (A) ... Are vertically connected via pedestal connection joints (5) ..., and a scaffolding plate (B) is horizontally provided.
A suitable number of scaffolding devices can be easily constructed by connecting them up and down, left and right (longitudinal and lateral) at the installation site, and assembling them by assembling a suitable number of them through the above.

In this case, when the ladder-shaped frame bodies (16) are arranged in parallel, at least the ladder-shaped frame bodies (16) arranged on the outermost side.
The pillars (1) and (1) of the respective gate frames (A) of (16) can be bent in a direction in which they approach each other, that is, an intermediate joint (2) of both pillars (1) and (1). The pedestal (1) so that the (2) bends toward each other.
Set the orientation of (1).

If necessary, the lower spacing regulating horizontal frame (17b) or the horizontal frame (17b) may be omitted, and a plurality of jack devices (not shown) having a well-known structure may be directly attached to the lower end of the pedestal to scaffold the scaffolding. In the field where the device is used, the horizontal posture can be maintained, and when the device is used in the boiler, it can be used in a suspended state.

From this assembled state, for example, in the high-pressure steam generation boiler (D) of a thermal power plant, the winding device (E) (schematic diagram) wire (F) arranged on the ceiling side of the boiler chamber.
For example, by connecting and suspending a horizontal frame (17a) for controlling the upper space, the three-dimensional construction is made by the gate frame (A) and the scaffold plate (B) as shown in the solid line diagram of FIG. After that, the braces (C) and (C) are spread over the vicinity of the joints (2) and (5) of the gate frames (A) and (A) that sequentially form the ladder frame body (16). It is advisable to extend the X-shape. When folding, the braces (C) are removed, and then the hoisting device lowers the entire suspension scaffolding device.

At the time of lifting, as shown by the two-dot chain line in FIG. 6, the scaffolding device extends from the folded state to a standing state in a stable posture in the vertical direction as a whole, and at the time of folding, Similarly, it is folded vertically from an upright position. Therefore, in either case, the scaffolding device does not swing in the horizontal direction and the wire does not swing, so that the wire strongly slides around the narrow wire hanging space provided on the ceiling. Good lifting without causing
The suspension operation can be performed. Moreover, the bending movement of the outermost pedestal (1) does not exceed the installation bottom width of the scaffolding device.

The scaffolding plate (B) used in the scaffolding device having the above-described structure has a hook metal fitting (18) at both ends as shown in FIG.
... is installed. These hook metal fittings (18) are horizontal on the horizontal support rod (4) so as to keep the horizontal parallel posture and follow the bending and extending movements of the gate frame (A) when the scaffolding device is extended and folded. It is engaged so as to be rotatable in the direction. Further, as shown in FIG. 7, the hook metal fittings (18) of the scaffold plates (B) (B) on both sides of the horizontal support rod (4) are engaged with each other, so that both scaffold plates ( B) To prevent the hook metal fittings (18) of (B) ... from interfering with each other on the horizontal support rod (4), the hook metal fittings (18) at both ends in the longitudinal direction of the scaffold plate (B) should be moved back and forth. It is arranged.

In the embodiment of the present invention, as shown in FIG. 3, the horizontal support rod (4) of the portal frame (A) is pivotally supported by its axis and the bending joint of the pedestal joint (5). It is arranged above the pivot shaft (8) of the pedestal connection joint (5) with a vertical distance (y) at least equal to or greater than the horizontal distance (x) between the shafts (8), By doing so, it is possible to fold the scaffolding plates (B) in a smooth and stable state at the time of lifting and folding.

That is, when the ladder-shaped frame bodies (16) are arranged side by side, the pedestal connection joint in each gate frame (A) of the ladder-shaped frame bodies (16) (16) arranged at an intermediate position. (5) Each gate-shaped frame (A) of the ladder-shaped frame body (16) at one end in the bending direction of ...
, Which are arranged in the same direction as the bending direction of the pedestal connection joints (5) ..., and the hooks arranged at both ends in the longitudinal direction of the scaffold plate (B) in the upright state of the suspension scaffolding device. Side ends of the metal fittings (17) (17) have horizontal support rods (4)
If the arrangement interval in the left-right direction of the gate frames (A) is set so as to be installed so as to be substantially in contact with the outer end surface of (4), the ladder-shaped frame body of the other side end portion at the time of lifting or folding. (16)
In all the remaining ladder-shaped frame bodies (16) except for, the pillars (1) of the gate frame (A) ... are opposed to each other, and the pillar connection joint (5) ... and the intermediate joint (2) ... Since they perform parallel link motions in the same direction, the scaffolding plates (B) ... erected on the horizontal support rods (4) of these gate frames (A) ... With respect to the horizontal support rods (4). Does not move horizontally.

Further, the ladder frame (16) at the other end and the horizontal support rods (4) of the gate frames (A) of the ladder frame (16) adjacent to and facing the ladder frame (16) are laid between the scaffold plates. (B) ... As shown by the chain line in FIG. 3, when the pedestal connection joint (5) bends, the horizontal support rod (4) pivots inward,
The horizontal support rods (4) (4) facing each other move in a direction in which they approach each other. Therefore, since the scaffolding plate (B) erected between both the horizontal support rods (4) and (4) is in an upright state and abuts and supports the horizontal support rods (4) and (4), whichever horizontal support rod (4) (4) is supported. The scaffolding plate (B) erected on the rod (4) is also lifted in a stable state with little swing,
Or it is folded.

In the gate frame (A), as shown in FIG. 9, for example, the horizontal support rod (4) is mounted at a position slightly lower than the pivot shaft (8) of the pedestal connection joint (5). A configuration can also be used. However, in this case, when the normal scaffolding plate (B) is used, some rocking due to interference between the ends of the scaffolding plate (B) at the time of lifting and folding the hanging scaffolding device cannot be avoided.

〔The invention's effect〕

As described above, according to the scaffolding device of the present invention, the joint pin (6b) protruding upward and the pin fitting hole (6a) into which the joint pin (6b) can be fitted are respectively provided at the upper and lower ends. The pedestal (1) provided is divided into two in the lengthwise direction, and joint pins (6b) and pin fitting holes (6a) that can be fitted to each other are provided at the opposite ends of the divided parts in the same manner as above. Joint brackets (7a) (7b) are fixed to the opposite ends toward one side, respectively, and the tips of these joint brackets (7a) (7b) are pivotally attached by a pivot shaft (8). The pivot support shaft (8) is connected so as to be bendable, and the pedestals (1) and (1) are installed in front and back at regular intervals, and the upper end portions thereof are horizontally supported for mounting scaffolding plates. (4) is integrally connected to form the portal frame (A). In addition to being able to fold compactly in a folded state, the pivot shaft (8) is provided at the tip of the joint brackets (7a) (7b) projecting to one side in the division of the pedestal (1). Therefore, the folding direction can be set only to the one side direction, and when it is erected, the joint pin (6b) fits into the pin fitting hole (6a) and the pedestal (1) is surely erected. It can be held in a state and firmly support the load applied in the vertical direction.

Further, in the gate frames (A) and (A) that are adjacent to each other in the left and right directions by arranging a large number of the gate frames (A), the scaffold plate (B) is provided between the horizontal support rods (4) and (4). In the vertically adjacent gate-shaped frames (A) and (A), the joint brackets (a) and (a) that are vertically opposed to each other are fixed to the upper and lower ends of the pillars (1) and (1) that are fixed to the above-mentioned divided parts ( The joint brackets (7a) and (7b) are projected toward the opposite side of 7a) and (7b), and the tips of these joint brackets (7a) and (7b) are pivotally attached by the pivot shaft (8). Since the pivot shaft (8) is connected so as to be bendable in the opposite direction to the upper and lower split parts, the scaffolding device as a whole extends vertically to a standing position in a stable posture during lifting, When folded, it is also folded vertically from the upright state. Therefore, in both cases, the scaffolding device does not swing in a horizontal direction and the wire does not swing, so that the space for wire hanging, such as that provided on the ceiling, is used for hoisting and hoisting. Even in the case of lowering, it is possible to perform a good hoisting / hanging operation without inconvenience such as strong sliding contact of the wire around the space. In addition, the divided portions of the pedestal (1) of the gate frames (A) and (A) arranged at the most both ends of the gate frames (A) and (A) arranged in the left-right direction are formed on the lower surface side of the scaffold frame. Since they are configured to refract in opposite directions toward each other, the pedestals (1) of these gate frames (A) and (A) do not project outward in the folded state,
Therefore, the entire scaffolding device does not exceed its installation bottom width, so construction in a limited space can be performed smoothly and reliably, and removal work can be performed easily without any hindrance. is there.

Thus, according to the scaffolding device of the present invention, it is possible to easily assemble in a limited space such as the boiler chamber, and further, after assembly, a hoisting device or the like installed on the ceiling side of the boiler chamber. By using, it is possible to construct a three-dimensional structure extremely easily and quickly, and it is possible to easily fold and disassemble in the opposite way, and it has an unprecedented excellent effect. .

[Brief description of drawings]

1 to 5 show a gate frame according to the present invention. FIG. 1 is a side view, FIG. 2 is a front view, and FIG. 3 is a part showing a connection state of a pedestal joint. Notched enlarged front view, FIG. 4 is an enlarged front view of the intermediate joint, FIG. 5 is a perspective view of essential parts showing the horizontal support rod in an exploded manner, and FIG. 6 is a front view schematically showing a suspension scaffolding device according to the present invention. Figures and 7 are enlarged perspective views of essential parts,
FIG. 8 is an enlarged plan view showing an example of the scaffold plate, and FIG. 9 is a side view showing a modified example of the portal frame. (1) …… Pedicle, (1a) …… Upper pedestal member, (1b) ……
Lower pedestal member, (2) …… Intermediate joint, (4) ……
Horizontal support rods for erection of scaffolding plates, (5) …… Joints for connecting pillars, (8) …… Bending pivot fulcrums, (16) …… Ladder frame,
(A) ... Gate frame, (B) ... scaffolding board, (x) ... horizontal distance, (y) ... vertical distance.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Hajime Hajime, 4-4-11 Nakatsu, Kita-ku, Osaka City, Osaka Prefecture Meiko Kogyo Kogyo Co., Ltd. (56) References: Japanese Patent Application No. 62-59769 Specification attached to the application of Sho 63-167542) and the description attached to the application of microfilm (JP, U) Jpn. Application No. 59-65945 (Jun. Sho 60-177248), in which the contents of the drawings are photographed. A micro film (JP, U) of the contents of the calligraphy and drawings

Claims (2)

[Claims] 1. A pedestal (1) having joint pins (6b) projecting upward at upper and lower ends and pin fitting holes (6a) into which the joint pins (6b) can be fitted, respectively. A joint pin (6b) and a pin fitting hole (6a) that are divided into two parts in the length direction and can be fitted to each other at opposite ends of the divided part in the same manner as above.
And the joint brackets (7a) and (7b) are fixed to the opposite ends toward one side, respectively, and the tips of these joint brackets (7a) and (7b) are connected to each other by a pivot shaft (8). Pivotally connected to each other so as to be bendable around the pivot shaft (8), the pedestals (1) and (1) are installed to face each other at regular intervals in the front and back, and a scaffold plate is installed between upper ends of the stanchions (1) and (1). The horizontal support rods (4) are integrally connected to form a portal frame (A), and a large number of the portal frames (A) are arranged vertically and horizontally, and the portal frames (A) that are adjacent to each other on the left and right sides. ) (A), the scaffold plate (B) is connected between the horizontal support rods (4) and (4) so that the scaffold plates (B) are vertically connected to each other in the vertically adjacent gate frames (A) and (A). Joint brackets (7a) fixed to the above divided parts at the upper and lower ends of the pedestal (1) (1)
Joint bracket (7a) facing away from (7b)
(7b) protruding, these johnt brackets (7a)
The tips of (7b) are pivotally attached to each other by a pivot shaft (8), and are bendably connected to each other about the pivot shaft (8) in the direction opposite to the upper and lower split parts, and further arranged in the left-right direction. The divided sections of the pedestal (1) of the gate frames (A) and (A) arranged at the outermost ends of the gate frames (A) and (A) are arranged in opposite directions toward the lower surface side of the scaffold frame. A scaffolding device characterized by being configured to be refracted. 2. The horizontal support tube (4) has a vertical distance (x) which is at least equal to or more than the horizontal distance (x) between the pivots (8) connecting the axis of the horizontal support tube (4) with the upper and lower pedestals (1) (1). Assembly scaffolding according to claim 1, wherein the scaffolding is arranged above the pivot shaft (8) at a distance y).