JPH08246662A - Unit scaffold - Google Patents

Abstract

PURPOSE: To improve efficiency in transportation and fabrication of a unit scaffold as well as for installation of connecting members and handrails to the unit scaffold by a method wherein an upper frame and a lower frame of the unit scaffold are connected with levers that are capable of rising and falling, and the frames are folded on occasion of transportation while being unfolded with the levers raised on occasion of fabrication. CONSTITUTION: On occasion of transportation, levers 7 and 11 are made to fall and folded with horizontal pins 8 and 12 moved in guide grooves 9 and 13 toward the side B on one end in the circumferential direction D of a tank, and connecting members 15 and handrails 20 are removed. On occasion of installation, an upper frame 1 is hoisted with a crane 22 and the levers 7 and 11 are raised with the horizontal pins 8 and 12 moved toward the side A. When the upper frame 1 comes to an upper limit, separating from a lower frame 4, connecting members 15 are fixed to sides 1b of the upper frame 1 with horizontal pins 16, and the connecting members are raised to the positions on the upper limit. After that, the connecting members 15 and 17 are connected with turnbuckles 31 and handrails 20 are installed on the frames.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable unit scaffold.

[0002]

2. Description of the Related Art When constructing a cylindrical tank or the like, a work scaffold is required to perform work such as welding. Therefore, conventionally, a unit scaffold a as shown in FIG. 10 has been used.

In FIG. 10, b and c are vertical members, d is an upper scaffolding floor attached to the upper ends of the vertical members b and c, and e is a lower end of the vertical members b and an intermediate position in the height direction of the vertical members c. The middle scaffolding floor, f is the lower scaffolding floor attached to the lower end of the vertical member c,
g, h, and i are upper, middle, and lower handrails, and k is a crane used when setting the unit scaffold a on the tank side plate j or removing it from the tank side plate j.

[0004]

In the unit scaffold a shown in FIG. 10, generally, each member is transported to the site by a truck or the like in a separated state, and each member is assembled on site to assemble the unit scaffold a. Alternatively, at the factory, the unit scaffold a assembled and integrated as shown in FIG. 10 is transported to the site.

However, when each member is transported to the site in a disassembled state, it is difficult to transport the parts because the parts have to be packed and it is necessary to assemble the components on site, so it takes time to prepare. In addition, a place for placing members and a place for assembling are necessary, which is wasteful.

Further, when the assembled and integrated unit scaffold a is transported to the site, the assembled unit scaffold a has a large volume, so that the number of unit scaffolds a that can be mounted on one truck is limited. A large number of trucks are needed and wasteful.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a unit scaffold capable of efficiently carrying and assembling and assembling it.

[0008]

According to the present invention, there is provided an upper frame having a scaffolding floor, a lower frame having a scaffolding floor and disposed below the upper frame, and an upper end of the upper frame on the side opposite to the tank side plate. A tiltable lever which is connected to one end side of the side via a horizontal pin and whose lower end is connected to the other end side of the side of the lower frame opposite to the tank side plate via a horizontal pin;
An inclination in which the lower end is connected to one end side of the side opposite to the tank side plate of the lower frame via a horizontal pin and the upper end is connected to the other end of the side opposite to the tank side plate of the upper frame via a horizontal pin. And a horizontal pin on the other end side of each lever is slidably fitted in a guide groove horizontally provided on the side of the upper and lower frames. .

Further, according to the present invention, the upper frame and the lower frame can be connected by a connecting member that can be pulled by a turnbuckle. Further, according to the present invention, a handrail is provided on the side of the scaffolding floor opposite the tank side plate. It can be detachably provided.

[0010]

[Function] Since the lever can be raised and lowered, the unit scaffold can be folded and transported at the time of transportation, and at the time of assembly, the lever can be raised to open the upper and lower frames, and the unit scaffold can be mounted by simply attaching the connecting member and the handrail. Can be assembled. Therefore, it is possible to efficiently and efficiently transport and assemble the unit scaffold.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 6 show an embodiment of the present invention.

In the figure, reference numeral 1 denotes an upper frame having a scaffolding floor 2 provided on an upper surface thereof, and below the upper frame 1, a lower frame 4 having a scaffolding floor 3 provided on an upper surface thereof is arranged. Thus, in the upper frame 1 and the lower frame 4, the sides 1a and 4a extending in the tank circumferential direction D1 are long and the sides 1b and 4b extending in the direction D2 orthogonal to the tank side plate 5 are formed in a short rectangular shape. Has been done.

Side 1 of the upper frame 1 on the side opposite to the tank side plate 5
On the one side A of the tank circumferential direction D1 of a, the upper end is a horizontal pin 6
A lever 7 that is pivotally attached to the side 1a through and extends obliquely downward toward the other end side B of the side 4a in the tank circumferential direction D1 is attached, and the horizontal pin 8 attached to the lower end of the lever 7 is
It is slidably fitted in a guide groove 9 that extends horizontally from the other end side B of the side 4a toward one end side A to a midway part of the side 4a.

Side 4 of lower frame 4 on the side opposite to tank side plate 5
On the one side A of the tank circumferential direction D1 of a, the lower end is the horizontal pin 1
A lever 1 pivotally attached to the side 4a through 0 and extending obliquely upward toward the other end side B of the side 1a in the tank circumferential direction D1.
The horizontal pin 12 to which 1 is attached and which is attached to the upper end of the lever 11 is slidably fitted in a guide groove 13 that horizontally extends from the other end side B of the side 1a toward one end side A to a midway portion of the side 1a. I am fit.

The crossing points of the levers 7 and 11 are connected by a horizontal pin 14 having a head, as shown in detail in FIG. The horizontal pin 14 has the lever 7,
A nut 38 fixed by a split pin 37 can be screwed on so as not to fall off from 11.

The horizontal pins 6, 8, 10, 12, 14
Are all parallel and are in the tank circumferential direction D1 with respect to the tank side plate 5.
The levers 7 and 11 have almost the same length,
The guide grooves 9 and 12 have substantially the same length.

On the sides 1b on both sides of the upper frame 1 in the tank circumferential direction D1, there are bar-shaped connecting members 15 located at both ends in the longitudinal direction (direction D2 orthogonal to the tank side plate 5) and extending downward. The long hole 15a is provided at the upper end of the connecting member 15 in the longitudinal direction thereof.
The horizontal pins 16 attached to both ends of the side 1b in the longitudinal direction are inserted therethrough, so that the connecting member 15 can be rotatably connected to both ends of the side 1b in the longitudinal direction via the horizontal pins 16. ing.

On the sides 4b on both sides of the lower frame 4 in the tank circumferential direction D1, there are bar-shaped connecting members 17 located at both ends in the longitudinal direction (direction D2 orthogonal to the tank side plate 5) and extending upward. The connecting member 17 can be arranged so that the connecting member 17 can be rotatably connected to both ends of the side 4b in the longitudinal direction via the horizontal pin 18.

Male screws are screwed on the lower end of the connecting member 15 and the upper end of the connecting member 17, and the turnbuckles 31 are screwed on the both screwed portions so that the connecting members 15 and 17 can be connected. Has become.

On the anti-tank side plate 5 side on the scaffold floors 2 and 3,
A plurality of relatively short guide cylinders 19 are provided upright in the longitudinal direction of the sides 1a, 4a, and the lower ends of the vertical members 20a of the handrails 20 are fitted in the holes 19a (see FIG. 4) of the guide cylinders 19. Thus, the handrail 20 can be installed on the scaffold floors 2 and 3.

Brackets 21 are provided at four corners on the scaffolding floor 2 of the upper frame 1, and the brackets 21 have holes 21a.
The wire rope 24 suspended from the hook 23 of the crane 22 can be secured via the.

On both sides of the side 1a of the upper frame 1 facing the tank side plate 5 on both sides in the tank circumferential direction D1, brackets 25 provided with vertically extending elongated holes 25a are provided so as to project toward the tank side plate 5. The unit scaffold can be installed at a predetermined position of the tank side plate 5 by passing the shackle 26 through the long hole 25a of the above and connecting the upper end of the shackle 26 to the bracket 27 protruding from the tank side plate 5 through the horizontal pin 28. It is like this.

Side 4a of the lower frame 4 facing the tank side plate 5
On both sides of the tank circumferential direction D1 of the tank, bolt-shaped stoppers 29 horizontally projecting toward the tank side plate 5 are attached through the nuts 30 welded to the side 1a so that their positions can be adjusted. By abutting the side plate 5, the unit scaffold can be held in a horizontal state.

The horizontal pins 16, 18 and 28 are parallel to each other, but they are offset by 90 degrees from the horizontal pins 6 and the like in plan view. Further, in the figure, 32 is a window provided by cutting out a part of a portion of the scaffold floors 2 and 3 facing the tank side plate 5, 33
Is a lid that can be rotated up and down via a hinge 34 to open and close the window 32, and 35 is the tank circumferential direction D of the upper and lower frames 1 and 4.
It is a projecting floor that is attached to one end so as to be able to rotate up and down via a hinge 36 and is supported on the upper and lower scaffold floors 2 and 3 of the upper and lower scaffolds 1 and 4 of the adjacent unit scaffolds during work. .

When the unit scaffold of this embodiment is manufactured in a factory and transported to the site, for example, as shown in FIGS. 7 and 8, the levers 7 and 11 are most tilted and the unit scaffold is in a folded state. The horizontal pins 8 and 12 are located at the other end side B end of the guide grooves 9 and 13 in the tank circumferential direction D1 and the connecting member 15 and the handrail 20 are removed.

In the case of the present embodiment, the connecting member 17 is shown attached to the lower frame 4 even when the unit scaffold is folded. However, due to the length, the folding of the unit scaffold may be hindered. In this case, the connecting member 17 is also removed.

When the unit scaffold is mounted on a truck or the like, since the unit scaffold is folded, a larger number of unit scaffolds can be stacked as compared with the case where the unit scaffold is not folded, and therefore efficient transportation can be performed.

When the unit scaffold is to be installed at a predetermined position on the tank side plate 5 in the field, the wire rope 24 is connected to the hole 21a of the bracket 21 with the unit scaffold placed on the ground, and the wire rope 24 is connected to the crane 22. Hook 2
Hang it on 3 and wind up the hook 23. Then, the upper frame 1 is lifted, the horizontal pins 12, 8 are guided by the guide grooves 13,
Since 9 slides toward the one end side A of the sides 1a and 4a, the levers 11 and 7 stand up from the tilted state, the distance between the upper frame 1 and the lower frame 4 gradually increases, and the horizontal pins 12 and 8 As shown in FIG. 1, when the one end side A end located in the middle of the sides 1a, 4a of the guide grooves 13, 9 is reached, the upper stage frame 1 reaches the upper limit position with respect to the lower stage frame 4, and further rises. do not do.

When the upper frame 1 reaches the upper limit position with respect to the lower frame 4, the connecting member 15 is attached to the side 1b of the upper frame 1 by the horizontal pin 16 and the connecting member 15 is provided through the elongated hole 15a.
Is raised to the upper limit position, and in this state, the turnbuckle 31 is screwed onto the lower end of the connecting member 15 and the upper end of the connecting member 17, and the turnbuckle 31 is rotated to apply tension to the connecting members 15 and 17. Put in a state. At this time, the connecting member 15 descends, and the upper end of the elongated hole 15a contacts the upper end of the horizontal pin 16.

The handrail 20 is also attached to a desired position on the scaffolding floors 2 and 3 by fitting the lower end of the vertical member 20a into the hole 19a of the guide cylinder 19.

Turnbuckle 31 of connecting members 15 and 17
When the connection by hand and the attachment of the handrail 20 are completed, the crane 22 is operated to wind up the hook 23 to lift the unit scaffold, convey it to a predetermined position on the tank side plate 5, and insert it into the long hole 25a of the bracket 25 in advance. The shackle 26 is attached to the bracket 27 projecting from the tank side plate 5 by the horizontal pin 28, and the position-adjusted tip of the stopper 29 is brought into contact with the tank side plate 5, and the wire rope 24 is removed from the bracket 21. Remove. with this,
Since the installation of one unit scaffolding is completed, another unit scaffolding is installed next to the already installed unit scaffolding and the overhanging floor 35 is supported by the scaffolding floors 2, 3 of the adjacent unit scaffolding in the same manner. In addition, the unit scaffold is installed so that the window 32 is located in front of the vertically-oriented welding groove.

After the unit scaffold is installed on the tank side plate 5, the worker rides on the scaffold floors 2 and 3 to perform work such as welding. If the welding direction is vertical, open the lid 33 and open the window 3
Open 2 for welding.

Since the unit scaffold of this embodiment is folded by tilting the levers 7 and 11 when carrying it to the site, assembly at the site can be performed easily and quickly, and the work is less wasteful. .

A handrail 20 is provided on the unit scaffold, and the overhanging floor 3 is provided between adjacent unit scaffolds.
Since 5 is provided, work at height can be performed easily, quickly and safely.

Since the procedure for removing the unit scaffold from the tank side plate 5 is only the reverse of the procedure for installation, the description thereof will be omitted.

FIG. 9 is the other side of the handrail 20 used for the unit scaffold of this embodiment, and in this embodiment, the scaffolding floor 2 or 3 is used.
The protrusion 39 is provided on the upper side, the vertical member 20a of the handrail 20 is formed by a pipe, and the lower end of the vertical member 20a is fitted onto the protrusion 39.

Even with such a configuration, the protrusion 39 of the handrail 20
It can be easily and quickly attached to and detached from.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0040]

EFFECTS OF THE INVENTION According to the unit scaffolding of the present invention, in any of claims 1, 2 and 3, there is no waste of transportation and assembly,
It is possible to achieve various excellent effects such that the work can be performed efficiently and the work can be performed easily and quickly.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a unit scaffold of an embodiment of the present invention is installed on a tank side plate.

FIG. 2 is a side view showing a state in which the unit scaffold of the present invention is installed on a tank side plate.

3 is a III-III direction arrow view of FIG. 1. FIG.

4 is a partially cutaway enlarged front view showing a lower end of a handrail used for the unit scaffolding in FIG. 1 and a guide tube installed on a scaffolding floor.

5 is a perspective view showing a state of a bracket and a shackle for installing the unit scaffold of FIG. 1 on a tank side plate.

6 is a plan view showing a scaffolding floor and an overhanging floor of the unit scaffolding of FIG. 1. FIG.

FIG. 7 is a front view showing a state in which the unit scaffold of FIG. 1 is folded.

8 is a VIII-VIII direction arrow view of FIG. 7. FIG.

FIG. 9 is a front view of another example of a handrail used for the unit scaffolding of the present invention.

FIG. 10 is a perspective view showing a state in which a conventional unit scaffold is attached to a tank side plate.

[Explanation of symbols]

 1 Upper frame 1a, 4a sides 2,3 Scaffolding floor 4 Lower frame 5 Tank side plates 6,8,10,12 Horizontal pins 9,13 Guide groove 15,17 Connecting member 20 Handrail 31 Turnbuckle A One end side B The other end side

Claims (3)

[Claims] 1. An upper frame having a scaffolding floor, a lower frame having a scaffolding floor and arranged below the upper frame, and an upper end having a horizontal pin on one end side of the side of the upper frame opposite to the tank side plate. And a lower end connected to the other end of the side of the lower frame opposite to the tank side plate of the lower frame via a horizontal pin in a tilted state, and a lower end of the lower frame opposite the tank side plate side. And a tiltable lever which is connected to one end side of the side of the side through a horizontal pin and whose upper end is connected to the other end side of the side of the upper frame opposite to the tank side plate side via a horizontal pin. A unit scaffold characterized in that a horizontal pin on the other end side of each lever is slidably fitted in a guide groove horizontally provided on the side of the upper and lower frames. 2. The unit scaffold according to claim 1, wherein the upper frame and the lower frame are connected by a connecting member that can be pulled by a turnbuckle. 3. The unit scaffold according to claim 1, wherein a handrail is removably provided on the side of the scaffold floor opposite to the tank side plate.