JPS6348765Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a work platform used when assembling the roof of a cylindrical tank.

Generally, when assembling the roof of a cylindrical tank, roof supports are provided such as end supports on the inside of the tank side panels, a center support in the middle, and especially for large tanks, intermediate supports. This is done while supporting the roof. As an example of scaffolding for workers during such tank roof assembly work, a roof work frame as shown in FIG. 1 of the accompanying drawings has conventionally been constructed. As shown in the figure, this mount 10 for a large tank has outer and inner periphery traveling mounts 11 that are rotatable concentrically about the center of the tank 1.
It is comprised of a steel truss 12 that is installed on this traveling frame 11 and assembled to a required height, and a scaffold 13 such as a metal plate fixed to the top of the truss 12. However, such a mount 10
In order to obtain the necessary height according to the height of the roof supports 2 such as end, intermediate and center supports, the curvature of the tank roof 3, etc., a considerable number of trusses 12 are used.
As a result, assembling and dismantling the frame 10 takes a lot of effort, which increases the number of man-hours and necessary expenses when assembling the tank.

Therefore, the purpose of this invention is to eliminate such drawbacks of the conventional method by installing a plurality of extendable lifters on a traveling platform, attaching a scaffolding table to the top of the lifter, and further connecting it to the adjacent scaffolding table. By providing connecting scaffolding,
To provide a frame for roof work of a cylindrical tank which can significantly simplify the complicated work involved in assembling and disassembling the frame for roof work.

According to this invention, the frame for working on the roof of a cylindrical tank consists of a traveling frame that rotates around the center of the cylindrical tank as an axis of rotation, a plurality of lifters installed in a line on the traveling frame, and a plurality of lifters installed in a row on the traveling frame. It consists of a scaffolding table attached to the top of the lifter and a passing scaffolding that connects adjacent scaffolding tables.

In addition, this crossing scaffold is composed of a parallel movement link mechanism so that it becomes a step-like scaffold when there is a difference in level between adjacent scaffolding tables, and furthermore, one end of the crossing scaffold can be moved between adjacent scaffolding tables as the lifter expands and contracts. It is connected to a corresponding scaffolding table so that the distance can be adjusted to allow for changes in the distance between the scaffolding tables.

Other objects, features and advantages of the invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

2 to 6 of the drawings show an embodiment of a frame for working on the roof of a large cylindrical tank according to this invention. As shown in the figure, the frame 20 of this invention used in the work of assembling the roof of a cylindrical tank 1 has wheels 21 for rotating around the center of the tank 1.
A plurality of lifters 2 are mounted on a traveling frame 22 having a
3 are installed in a line in the tank radial direction. This lifter 23, as clearly shown in FIGS. 3 and 4,
It is composed of a hydraulic machine 25 and a so-called lage tong mechanism, which is made by alternately combining links 24 made of steel or the like having sufficient strength and connecting the intersecting parts with pins, and a hydraulic machine 25. The lifter 23 is The scaffolding table 26, which is made of a metal plate or the like attached to the upper part of the lifter 23, expands and contracts so that the required height can be quickly obtained. Scaffold table 26 and adjacent scaffold table 2
A crossing scaffolding 27 as shown in FIGS. 5 and 6 is installed between the sections 6 and 6. The crossing scaffolding 27 has a pair of long links 28 and a pair of short links 29 formed into a parallelogram by pin connection, and a plurality of intermediate links 30 connected to the long links 3 in parallel with the short links 29.
It is constructed by using two sets of scaffolding members 31 which are pin-coupled with 0 and are arranged in parallel, and a footboard 32 such as a metal plate is fixed to the upper end of each opposing intermediate link 30. Such a crossing scaffolding 27 and scaffolding table 26
Since the distance between the scaffold tables 26 of adjacent lifters 23 changes according to the difference in height of each lifter 23, the connection between the lifters 23 and Board material 33
A distance adjusting section is provided in which a plate material 35 fixed to the short link 29 of the scaffold 27 is connected with a screw 36 across the groove 34 of the scaffold 27, and the screw 36 can slide within the groove 34. After determining the distance, the distance adjusting section is fixed by further tightening the screw 36 or the like. Also, since this passing scaffold 27 has a parallel movement mechanism, if there is no step between the scaffolding tables 27 and 27 as shown in FIG.
2 are lined up in a row to form a flat plate, and when a step occurs as shown in FIG. 6, the footboards 32 form a stepped footing.

In this way, according to this invention, when assembling the roof of a circular tank, the roof work platform uses lifters that can be expanded and contracted in the vertical direction instead of the conventional trusses, making it easy to adjust the height required for the scaffolding. In addition, the scaffolding that connects the scaffolding tables on each lifter forms a step-like scaffolding according to the level difference of the scaffolding table, so the curvature of the tank roof or the installation location of the mount can be adjusted in conjunction with the elasticity of the lifter. In addition to making it possible to quickly respond to changes, etc., it also becomes extremely easy to move back and forth between scaffolding tables, significantly improving work efficiency and safety. In addition, equipment such as lifters and crossing scaffolding can be used for other tanks, so equipment can be standardized.
Further, since the assembly and disassembly of the frame is very easy, there are advantages such as reduction in man-hours and costs during tank assembly.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of a conventional roof mount when assembling the roof of a cylindrical tank, and Fig. 2 is a schematic explanatory diagram of the roof mount according to this invention when assembling the roof of a cylindrical tank. , Fig. 3 is a plan view of the lifter of the roof work frame according to this invention, Fig. 4 is a side view of the lifter of Fig. 3, and Figures 5 and 6 are cross-sectional views of the roof work frame according to this invention. FIG. 7 is an enlarged partial view of the connecting portion of the scaffolding and the scaffolding table. In the figure, 1: cylindrical tank, 2: roof support,
3: Tank roof, 10, 20: Frame, 11, 2
2: Traveling frame, 12: Truss, 13: Scaffolding, 2
1: Wheel, 23: Lifter, 24: Link, 2
5: Hydraulic machine, 26: Scaffolding table, 27: Ferrying scaffold, 28: Long link, 29: Short link, 30: Intermediate link, 31: Scaffolding member, 32: Step board, 3
3, 35: plate material, 34: groove, 36: screw.

Claims (1)

[Claims for Utility Model Registration] A traveling platform that rotates around the center of a cylindrical tank as an axis of rotation, a plurality of vertically extendable lifters installed on the traveling platform, and an upper part of each of the lifters. a scaffolding table attached to the scaffolding table; and a crossing scaffolding that connects the adjacent scaffolding tables, and the crossing scaffolding moves in parallel so as to form a stepped scaffold when a step occurs between the adjacent scaffolding tables. It is comprised of a link mechanism, and one end of the passing scaffold is connected to the corresponding scaffold table so that the distance can be adjusted to allow for a change in the distance between the adjacent scaffold tables as the lifter expands and contracts. A stand for working on the roof of a cylindrical tank.