JPS597949Y2 - Scaffolding equipment for tower-like structures, etc. - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a scaffolding device used for installation work of tower-shaped trench structures such as the installation of high-voltage power transmission towers, and particularly relates to a scaffolding device that improves the horizontal maintenance of a movable work platform.

Generally, tower-like structures such as steel towers are installed by sequentially adding members of each structural block stage.
Scaffolding is required for the installation work.

For this reason, in the past, temporary scaffolding boards have been attached to each additional member, but the attachment work requires a lot of effort, is extremely troublesome, and is also accompanied by great danger.

Therefore, the present applicant has provided a scaffolding device for a tower-like structure or the like designed to solve the above-mentioned problems.

This scaffolding device has a structure in which a boom with an extendable structure is held on the tower via a climbing means so that it can be driven upward and downward, and a work platform attached to the tip of the boom is displaced in the vertical direction by the upward and downward movement of the boom. Because of this, it is necessary to maintain the work platform horizontally at all times, no matter what angle of elevation the boom is at or even during the elevation operation.

This idea was made based on this need, and the workbench attached to the tip of the extensible boom has a tower-like structure that is always held horizontally regardless of the boom's extension/contraction or elevation movement. The purpose is to provide scaffolding equipment for structures, etc., and thereby contribute to improving work safety.

Preferred embodiments of this invention will be described below with reference to the drawings.

In the scaffolding device shown in FIG. 1, the tower equipment 1, which is an example of a boom support, includes a tower 2 installed at a work site for installing a tower-like structure, a climbing beam 3 suspended from the tower, and a climbing beam 3 supported by the beam. The structure includes a pass frame 4 and a swing frame 5 attached to this frame.

In such tower equipment 1, the base end of a main boom 6 is pivotally attached to the lower wall of the swing frame 5 so as to be able to rise and fall freely, and the main boom 6 is connected to a cylinder 7 for elevation mounted between it and the swing frame 5. It is driven up and down by the telescoping action.

A telescoping boom 8 is attached to the main boom 6 to extend and retract along the extension direction of its distal end. This workbench 11 has a sheave 12 at its end.

On the tip side of the main boom 6, there is a lower terminal 1 for anchoring the rope.
3 is integrally protruded, and one end of a stabilizer rope 14 for maintaining the workbench 11 horizontally is fixedly connected to this terminal 13.

This stabilizer rope 14 is a telescopic boot.
from the proximal sheave 9 to the distal sheave 10 of the system 8 and the workbench 1
The other end is fixedly connected to an upper terminal 15 integral with the revolving frame 5 in a tensioned state in which the end sheave 12 of the first sheave is sequentially wrapped around the telescopic boom 8 and the main boom 6, respectively.

Such a structure for hanging the stabilizer rope 14, that is, making the stabilizer rope 14 parallel to each of the main boom 6 and the telescopic boom 8 between the tip sheave 12 and the upper terminal 15 of the work platform 11 is suitable for the work platform. This is the most important thing for maintaining the horizontal position of No. 11.

Therefore, the stabilizer rope 14 has a constant overall length,
Both sheaves 9 and 10 of the telescopic boom 8 and the length between the tip sheave 10 and the tip sheave 12 of the workbench 11 remain constant at all times, and the rope span l1 between the lower terminal 13 and the sheave 9 and the upper terminal 15 The rope span l2 between the sheave 12 and the sheave 12 changes due to the telescoping operation of the telescopic boom 8, but in this case, the respective span changes are inversely proportional to each other by the same amount.

Therefore, both booms 6, 8 and the work platform 11, as well as the stabilizer rope 14 between the sheave 12 and the upper terminal 15,
In addition, since the base end pivot point P of the main boom 6 and the upper terminal 15 are along parallelograms, the work platform 11 can be moved by the upward and downward movement of both booms 6 and 8 and the telescopic movement of the telescopic boom 8. It always maintains a horizontal position regardless of the

More specifically, when both the booms 6 and 8 at the solid line position in FIG. 2 are moved up and down in the direction of the chain line position in the figure with the base end pivot point P as the center, the upper terminal 15 and the sheave 12 will be connected to each other. The stabilizer rope 14 between the two booms 6 and 8 maintained the same length as the span L between the base end pivot point P and the tip sheave 10, and maintained a parallel state with both the booms 6 and 8. Both booms 6,
Move up and down with 8.

Therefore, the work platform 11 always maintains a horizontal posture at any position during the upward movement of both the booms 6 and 8, and this means that when both the booms 6 and 8 are downwardly moved, and when the upward and downward angle of elevation changes from 0θ to -θ direction. This is the same both during movement and when the telescopic boom 8 is telescopically operated.

Although the boom structure or two-stage extension of the above example is used,
The boom structure may be one that extends in three stages as shown in FIG.

In this case, the stabilizer rope 14 connected to the lower terminal 13 of the first stage main boom 6 is passed from the base end sheave 9a of the second stage telescopic boom 8a to the tip sheave 10a, and then From the proximal sheave 9b to the distal sheave 10b of the telescopic boom 8b and the distal sheave 12 of the workbench 11
The booms 6, 8a, and 8b may be connected to each other in parallel to the upper terminal 15, and the operation and effect in this case are the same as in the previous embodiment. is omitted.

In the embodiment described above, the telescopic booms 8 and 8a have a holding structure that allows them to slide freely relative to the main boom 6 via guide rollers, and by the same means, the second stage telescopic boom 8a is attached to the third stage telescopic boom 8a. It is held by the telescopic boom 8b,
Additionally, boom telescoping drive means are assembled between the main boom 6 and the telescoping booms 8 and 8a, and between the telescoping booms Ba and 8b.This boom telescoping drive means has various structures. Since this is not directly related to the gist of the invention, illustrations and explanations will be omitted.

In summary, in this invention, a stabilizer lobe, one end of which is connected to the distal end of the main boom that is to be moved up and down, is pivoted from the proximal sheave of at least one telescopic boom to the distal sheave and the most distal end of the telescopic boom, and is movable up and down. The sheaves were successively strung over the tip sheave of a working platform, and then tied to the boom support side in parallel with each boom, resulting in the following remarkable effects.

(1) The stabilizer rope is always parallel to each boom between the tip sheave of the work platform and the boom support side anchorage, and the rope is connected between the rope anchorage of the main boom and at least the proximal sheave of the telescopic boom. As mentioned above, the span and the rope span of the part parallel to each boom change in inverse proportion to the same length depending on the amount of operation when the telescopic boom is extended or contracted. Regardless of whether the boom is extending or retracting, or whether they are moving simultaneously, the workbench always maintains a horizontal position, regardless of these movements.

(2) By keeping the work platform in a horizontal position at all times, it greatly contributes to ensuring the safety of the workers on the platform, and the tower-like structure allows the boom to have a large range of vertical movement. Workability during installation of objects can be greatly improved.

(3) As mentioned above, the workbench is held horizontally using ropes, so the construction is simple.

[Brief Description of the Drawings] Fig. 1 is a side view of the entire scaffolding device showing a preferred embodiment of this invention, Fig. 2 is a schematic diagram illustrating the operation of the device, and Fig. 3 is a diagram illustrating a modified example. be. In the figure, 1 is the boom support, 6 is the main boom, 8, 8 a
, 8b is a telescopic boom, 9.9 a , 9 b , 10.
10 a , 10 b , 12 are sheaves, 11 is a workbench, and 14 is a stabilizer lobe.

Claims (1)

[Scope of utility model registration request] At least one telescopic boom that slides in its extension direction is attached to a main boom whose base end is pivoted to a boom support and is moved up and down, and a work platform is pivoted to the distal end side of the telescopic boom so as to be movable up and down, A stabilizer rope with one end tied to the tip side of the main boom is sequentially stretched from the base end sheave of the telescopic boom to the tip sheave and the tip sheave of the work platform, and then tensioned to the boom support side in parallel to each boom. Scaffolding equipment for tower-like structures, etc., characterized by: