JPS5834632B2 - movable scaffolding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a movable scaffold used for painting, maintenance and inspection of power transmission line towers, etc.

In the past, scaffolding was not set up for painting, maintenance and inspection of power transmission line towers, and work was carried out on all four sides around the tower by tying lifelines to the tower members, which was dangerous and inefficient. It was bad.

Moreover, there are various types of scaffolding. However, there has been no existing scaffolding that can be used on steel towers, etc., where the work surface is sloped and the width narrows as it goes upwards, and there has been hope for a new method.

This invention was devised in view of the above-mentioned circumstances, and its purpose is to provide a simple scaffolding structure that can accommodate variations in the width of the work surface.

Hereinafter, the present invention will be described with reference to an illustrated embodiment. A frame 1 in the form of a rectangular ring is attached to a pair of left and right main columns A and B of a steel tower, for example, or a pair of main columns C and D located in front and rear positions thereof. Each is attached so that it can be raised and lowered freely, and inside the frame there is a rectangular ring-shaped scaffold pedestal 2 that is pivotally supported on the upper and lower horizontal members 1a.
is supported so as to be able to rotate by 90 degrees perpendicularly to the direction of elevation of the gantry, that is, horizontally, and furthermore, support rollers 3, 3/ are provided on the lower cross member 2a and left and right hard members 2b within the scaffold cradle.

A scaffold body 4 with a triangular cross section is inserted between the pair of left and right frames 1, and its end is inserted into the scaffold pedestal 2, and the scaffold body 4 is connected to both sides of the pedestal and the pedestal via support loaves 3t3' within the scaffold pedestal. It is supported from below and is horizontally movable across the pedestal 1.

Further, although not shown, an external stop is applied to the scaffold main body 4 so that it does not separate from the scaffold pedestal 2 during horizontal movement.

This scaffold main body 4 is made up of a plurality of unit scaffolds connected via inko joints, etc., and the length is made according to the maximum working surface between the main pillars A and B, depending on the number of connected scaffolds, and the front stepping side The handrail 5 is removably provided at the scaffolding body 4, and the worker
A safety bell attached to the waist that moves horizontally on the top 6
A fixing fitting 7 for fixing the handrail 5 to the handrail 5 is attached to the upper part of the handrail so as to be slidable in the longitudinal direction thereof.

Even if the width of the work surface changes depending on the lifting position, the scaffold body 4 between the pedestals 1 can be moved horizontally with respect to the scaffold pedestal 2, so the length of the scaffold body between the pedestals will be adjusted accordingly. Moreover, the length is automatically adjusted as the scaffold is raised and lowered.

Moreover, even if the pedestal 1 swings from side to side with respect to the main pillars A and B,
Since the scaffold body can rotate or move horizontally within the pedestal, the scaffold body can be supported movably without putting pressure on the pedestal 1, the scaffold body 4, etc. Adjustment of the length between the mounts of the main body is performed reliably.

The movable scaffold 8 is attached to a pedestal 1 which is attached to a working tube between main columns A and B and between C and D so that it can be raised and lowered to each main column for use when painting the power transmission line tower T. However, the frame 1 has hardwood 1b and hardwood 1b' on the diagonal line connecting the quadrilateral main pillars A and C or the main pillars B and C.
This allows it to be fixed to the main pillar using fixtures 9 such as releasable lamps provided above and below the hardwood 1b on the main pillar side.

In addition, for raising and lowering the scaffolding frame, brackets 10 are provided at the upper part, middle bending point, and lower part of the main column so as to protrude in the same direction as the frame 1 on the main column, and are releasable.
Sheaves 12 and 12' are rotatably attached to the tip and base ends of each bracket, respectively, and two winches 13 and 13 are installed on the ground for each main pillar.
' is installed, and the lifting wire 14 whose both ends are wound around both winches 13 and 13' is attached to the lower, middle, upper sheave 12,
The upper, middle, and lower sheaves 12' are stretched along the main pillars in this order, and the pedestal 1 has lifting wires 14 at each main pillar.
The central part of the upper and lower cross members 1a is locked and assembled into the upper and lower cross members 1a.

In addition, when using such a lifting device, release the fixture 9 to unfasten the frame 1 from the main column, and then attach the winch 1.
3.13' is activated to move the lifting wire 14 under tension and lift and lower the frame 1 of the main pillars A, B, C, and D.
At this time, each mount 1 is rotatable, and since the relative positional relationship around the main pillar cannot be maintained in some cases, it is necessary to prevent the mount from rotating.

For preventing rotation, the top, middle, and bottom brackets 10 are inserted through the tip of the bracket 10 and both sides of the sheave 12.
A pair of parallel guide wires 15 are stretched over the frame 1, and rollers 16 for holding both guide wires so as to receive the guide action are attached to the mounting arm protruding from the sides of the upper and lower cross members 1a. It is pivotally supported at the tip of 1γ.

Further, a set of rotary guide rollers 18 are provided on the upper and lower cross members 1a of the pedestal 1 so that the flange F of the main pillar does not obstruct the passage of the pedestal 1 when the scaffold is raised and lowered.

In addition, as will be described later, the scaffold main body 4 has an intermediate part,
Preferably, the scaffold can be divided into two parts 4a and 4b at a joint in the center.

When using the movable scaffold 8 for painting power transmission line towers T, etc., first move the movable scaffold 8 to the working tube between the main pillars (corner pillars) A and B, and between C10 by synchronously operating two winches 13゜13/. The robot is raised along the horizontal axis, fixed via the fixture 9 at each work position, the lifting wire 14 is loosened, and the worker is allowed to work.

When moving the movable scaffold 8 up and down, the pedestal 1 is attached to the intermediate bracket 1.
0, another intermediate bracket 10 (not shown) prepared in advance is installed near, above or below the intermediate bracket 100 that obstructs the passage of the frame 1, and the intermediate bracket 10 is removed by releasing the fixture 11. , passing through the frame 1.

The work surfaces between the main pillars B and C and between D and A are also worked in the same way, but the necessary scaffolding is set up as follows: 1.

That is, the scaffolding is moved from the position shown by the solid line in FIG. 2 to the position shown by the chain line.

First, fix the pedestal 1 to the main pillar and attach the scaffold main body 4 to the scaffold segment 4.
a and 4b, move each scaffold segment horizontally (in the direction of the arrow) within the scaffold pedestal 2 to the position shown by the chain line, and then move the scaffold pedestal 2 to the pivot support of the upper and lower cross members of the pedestal 1. 90
The scaffolding bodies 4a, 4b are rotated on a horizontal plane (in the direction of the arrow).
The ends of the scaffolds are connected and fixed so that their ends touch each other (positions shown by chain lines), and the scaffold is placed between the front and rear frames.

The guide wire 15 becomes an obstacle when moving the scaffold in this way, but in this case, the guide wire 15 loosens the tension device of the lower bracket so that the scaffold can be rotated from the side where it is located to the opposite side without hindrance. After moving to , you can relax again.

Since the present invention has the above configuration, it has the following effects.

(1) Since the scaffold body is movably supported and inserted into a pair of left and right frames that can be raised and lowered, the length of the scaffold body between the frames is variable, and the length of the scaffold body between the frames is variable. If it is located on the side of the work surface, it can be automatically adjusted according to the width of the work surface as the scaffold goes up and down.

(2) Since the scaffold main body is installed within the pedestal of the scaffold cradle so that it can be horizontally rotated, the scaffold can be moved up and down reliably without being affected by the left and right rocking of the pedestal. Since each scaffold segment is easily rotated into the frame, the scaffolding can be easily and quickly changed from between the front and rear main pillars to between the left and right main pillars, thereby improving work efficiency.

[Brief explanation of the drawing]

Figure 1 is a front view of the steel tower, Figure 2 is a plan view of the tower showing the situation of scaffolding movement, Figure 3 is an enlarged view of the main parts of Figure 2, and Figure 4 is the 3rd floor view of the scaffolding seen in the longitudinal direction. Fig. 5 is a schematic diagram showing the principle of the scaffold lifting device, Fig. 6 atb is a plan view and front view of the upper bracket, Fig. 7 is a plan view of the lower bracket, and Fig. 8 is a schematic diagram showing the principle of the scaffold lifting device. FIG. A, B, C, D... Main pillars. F...flange, L...lifting device, 1
... Frame, 1a... Horizontal member, 1b...
...Hardwood, 2...Scaffolding stand, 2a...
・Horizontal material, 2b...Hardwood, 3,3'...
Support roller, 4...Scaffolding body, 4at 4b.
...Scaffolding fragment, 5... Handrail, 6...
・・Safety belt, 7・・Fixing metal fittings, 8・・・・
...Movable scaffolding, 9...Mounting fixtures, 10...
・Bracket, 11...Mounting tool, 12, 12'
... Sheave, 13, 13 / ... Winch, 14 ... Lifting wire, 15 ... Guide wire, 16 ... Roller, 17・・・・・・
・Mounting arm, 18...Rotary set guide roller.

Claims (1)

[Claims] 1 Mounting platforms are attached to the front, rear, left and right main pillars of the power transmission line tower so that they can be raised and lowered, and the scaffolding bodies, which are formed by connecting the ends of the scaffolding sections, are inserted into the left and right paired mounts so as to be movable in the horizontal direction. The scaffold was intercepted by being placed between the frames, and each of the scaffold segments was supported within the frame so as to be able to rotate 90 degrees horizontally while being inserted into the frame, and the left and right scaffold segments were 90. A movable scaffolding characterized in that it is also possible to swivel the scaffolding and place the scaffolding between a pair of front and rear platforms.