JPH0443547Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a stage for working on the outer periphery of a columnar structure that is moved up and down by a lifting means.

(Prior art) Conventionally, when carrying out various types of construction work on the outer periphery of a columnar structure that supports offshore work platforms, etc., scaffolding was installed at predetermined intervals around the outer periphery of the columnar structure, or self-propelled work was carried out. The work is carried out using a type of aerial work vehicle, or by hoisting it up using a separate crane on the work stage and working on each side of the columnar structure one by one.

(Problems that the invention aims to solve) The conventional method of erecting scaffolding takes a lot of time and money, and when using a self-propelled aerial work vehicle, the columnar structure is relatively short (20 m or less). It could only be used in certain cases.

In a conventional work stage that is lifted by a crane, the work stage is not restrained by a columnar structure, so wind or movement of the worker on the work stage causes the work stage to sway and change the distance between the work surface and the worker. This made the work difficult. In addition, the work stage and the columnar structure may come into violent contact, which is dangerous.

Furthermore, it was only possible to work on one side of the columnar structure at a time, and the crane had to be moved each time the work surface was changed.

(Means for Solving the Problem) The stage for working on the outer periphery of a columnar structure according to the present invention is moved up and down by a lifting means, and is used as a work floor when performing work on a columnar structure. The stage consists of a work stage main body and a removable split work stage.
A notch through which the columnar structure can be inserted is formed on one side of the work stage main body, and the work stage is guided vertically along the columnar structure on the inner peripheral side of the cutout. The removable split work stage is removably fixed to the work stage body at the outer end of the cutout with a columnar structure inserted through the cutout of the work stage body. It is something.

(Function) In the stage for working on the outer periphery of a columnar structure according to the present invention, the columnar structure is inserted into the notch formed on one side of the main body of the work stage, and the columnar structure is attached to and removed from the outer end of the notch. The expression division work stage is fixed.

Then, when the lifting means is driven, the work stage moves along the columnar structure while being guided in the vertical direction of the columnar structure by a guide roller provided on the inner peripheral side of the notch.

(Effect of the invention) According to the stage for working around the outer circumference of a columnar structure according to the present invention, as explained above, the columnar structure is inserted into the notch of the work stage, and the movement of the work stage is restrained via the guide roller. Therefore, it is possible to prevent the work stage from being shaken and the distance between the work surface and the worker to change due to wind or the movement of the worker on the work stage, thereby improving work efficiency.

Furthermore, since the work stage is arranged around the entire circumference of the columnar structure, it is possible to work on the entire circumference of the columnar structure at once, and the position of the work stage can be placed around the outer circumference of the columnar structure. There is no need to switch horizontally along the line.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

As shown in Fig. 1, the stage for working around the outer circumference of a columnar structure according to this embodiment is used when performing work such as painting on the outer circumferential surface of the legs of a self-rising offshore work platform (hereinafter referred to as a columnar structure). This work stage is suitable as a work floor.

As shown in FIGS. 1 and 2, a work stage 1 includes a work stage main body 2 that is lifted from above a columnar structure L by a separate crane and moved up and down along the columnar structure L, and a work stage main body 2. It is composed of a dividing work stage 3 which is detachably fixed to the main body 2.

The work stage main body 2 includes a substantially rectangular flat plate floor member 4 and a frame member 5 for reinforcing the floor member 4 on the lower surface of the floor member 4. A substantially rectangular notch 6 is formed up to about 1/3 of the front part of the floor member 4, and the columnar structure L is inserted into the notch 6. Further, a pair of left and right hanging pieces 7 are protruded near the rear end of the upper surface of the floor member 4 and at the approximate center in the longitudinal direction, and a wire 8 is tied to each hanging piece 7. They are bundled at a position above the work stage main body 3 and hung on the hook H of the crane. Furthermore, handrails 9 are provided on the work stage main body 2 over the rear edge and both left and right edges. A pair of guide rollers 10 are rotatably disposed on both left and right sides of the inner periphery of the notch 6, and a pair of guide rollers 10 is rotatably disposed on the rear side.
1 is arranged to guide the work stage 1 along the circumferential surface of the columnar structure L when the columnar structure L is inserted into the notch 6 and the work stage 1 is moved up and down.

The guide roller 10 is removable, and as shown in FIG.
A pair of guides 12 protrude inwardly from the notch 6 on both sides thereof, and a bottom plate is provided on the lower surface of each guide 12. A substrate 13 that slides up and down is provided between the pair of guides 12, a handle 14 is provided on the top surface of the substrate 13, and a pair of flanges are provided from approximately the center of the substrate 13 toward the inside of the notch 6. A roller 16 made of metal and provided with a rubber lining on the circumferential surface is rotatably supported on this flange 15 via a support shaft 16a. It is fixed to the work stage main body 2 by 17.

The dividing work stage 3 has a substantially rectangular flat plate,
Consisting of a reinforcing bone member and a handrail 9 erected upward from the front edge, it is removably fixed to the upper surface of the work stage 1 on the front end side of the notch 6, and is approximately 300 mm from the columnar structure L. They are placed in separate locations.

Next, the operation of the work stage 1 will be explained.

First, from the work stage main body 2 to the guide roller 1
0 and the divided work stage 3 are removed, the columnar structure L is inserted into the notch 6 formed in the front side of the work stage main body 2, and the guide roller 10 and the divided stage 3 are fixed to the work stage main body 2.

Then, when the crane suspending the work stage 1 from above the columnar structure L is driven, the work stage 1 is moved by the guide rollers 10 provided on both the left and right sides of the notch 6 and the guide rollers provided on the rear side. It is guided vertically by rollers 11 so as not to move horizontally along the columnar structure L.

As explained above, since the structure L is inserted with the guide roller 10 removed, the columnar structure L will not come into contact with the guide roller 10 and damage the guide roller 10.

Further, the work stage 1 includes each guide roller 10.
Since the movement is restrained by the guide rollers 11, the distance between the work surface and the worker can always be kept constant.

Furthermore, since the work stage 1 is arranged around the entire circumference of the columnar structure L, it is possible to perform work such as painting on the entire circumference of the columnar structure L at once.

It should be noted that the guide roller 10 described above may be different in distance from the inner periphery of the notch 6 to the roller 16.
By simply replacing , the work stage 1 of the present invention can be applied to columnar structures L of various sizes.

[Brief explanation of the drawing]

The drawings show this embodiment; FIG. 1 is a perspective view of a working stage, FIG. 2 is a plan view of the main part of the working stage, and FIG. 3 is a perspective view of a guide roller. L... Column structure, 1... Work stage, 2...
...Work stage main body, 3...Divided work stage,
6... Notch, 10... Guide roller, 11...
guide roller.

Claims (1)

[Scope of Claim for Utility Model Registration] A work stage that is moved up and down by lifting means and used as a work floor when working on a columnar structure, the work stage consisting of a work stage main body and a removable split work stage. A notch through which the columnar structure can be inserted is formed on one side of the work stage main body, and the work stage is guided in the vertical direction along the columnar structure on the inner peripheral side of the cutout. The removable split work stage is removably fixed to the work stage main body at the outer end side of the notch with the columnar structure inserted into the notch of the work stage main body. A stage for working on the outer periphery of a columnar structure.