JPH1061169A - Moving scaffold device for high lift work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scaffold which can be easily arranged at a job site of a small space without requiring to secure a flat space to arrange the scaffold by arranging the scaffold on the tips of vertically freely movable parallel links joined to a pair of left and right columns by pins. SOLUTION: Parallel links 2 are joined to a pair of left and right columns 1 and 1 through pins 3 so as to be vertically freely movable, and a wire 6 wound round a winch 5 rotated by an electric motor 4 is hookingly installed on the tips of the parallel links 2. The parallel links 2 vertically move by towing the wire 6, and a scaffold 8 is arranged between the parallel links 2 and 2 so as to be longitudinally freely movable through a longitudinally sliding device 7. Stairs 9 are arranged between the scaffold 8 and pin 3 joining, and the rear ends of the parallel links 2 and the columns 1 are connected to each other through a hydraulic cylinder 10. The parallel links 2 vertically move the scaffold 8 on its upper tips according to a diameter of a steel pipe by towing the wire 6, and the scaffold 8 also longitudinally moves by the longitudinally sliding device 7, and work just above the steel pipe is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile scaffold for working at heights such as pipe seam welding.

[0002]

2. Description of the Related Art Conventionally, as a scaffold used for pipe seam welding work, there has been a link-type vertically movable scaffold which is commercially available on a bogie.

[0003]

In a conventional mobile scaffold, which is commercially available, the entire apparatus is mounted on a cart by moving only in the vertical direction, so that the floor at the place of use is a flat space where the cart can enter. Had to secure. And it is difficult to work on the upper half of the pipe when welding pipes due to its structure.Moreover, the whole equipment is quite large and requires space from the floor to the position of the work scaffold. In some cases, it cannot be used.

The present invention has been developed to address such a problem, and can be used even in a small space or even if the floor is not flat, and the work of the upper half of the welded pipe is easy. The aim is to get a mobile scaffold.

[0005]

In order to achieve the above-mentioned object, according to the present invention, a parallel link is vertically connected to a pair of left and right pillars via pins so that the parallel link is vertically movable. A scaffold is movably installed, a stair is provided between the scaffold and the pin connection, and a rear end of the parallel link and the pillar are connected via a hydraulic cylinder.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Reference numeral 1 denotes a pair of right and left columns. A wire 6 wound around a winch 5 rotated by an electric motor 4 is mounted on the tip of the parallel link 2 so that the parallel link 2 moves up and down due to the suspension of the wire 6. And the forward and backward moving slide device 7 between the parallel links 2 and 2
A step 9 is provided between the joint of the scaffold 8 and the pin 3, and a rear end of the parallel link 2 is connected to the column 1 via a hydraulic cylinder 10. In the figure, reference numeral 11 denotes large and small steel pipes.

Thus, the parallel link 2 is suspended by the wire 6 so that the scaffold 8 at the upper end thereof is connected to the steel pipe 1 as shown by the dotted line in FIG.
The scaffold 8 is moved up and down by the forward / backward slide device 7 so that the work directly above the steel pipe 11 is also facilitated.

[0008]

As described above, according to the present invention, since the scaffold is installed at the tip of a vertically movable parallel link that is pin-connected to a pair of right and left columns, it is necessary to secure a flat space for installing the scaffold. Since the rear end of the parallel link is connected to the pillar via a hydraulic cylinder, it is possible to prevent the scaffold from dropping and to secure the work safety.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a side view of FIG.

[Explanation of symbols]

 1 pillar 2 parallel link 3 pin 8 scaffold 9 stairs 10 hydraulic cylinder

Claims (1)

[Claims] 1. A pair of left and right pillars is connected to a pair of parallel links via pins so as to be vertically movable, and a scaffold is installed at the tip of the parallel link so as to be able to move back and forth, and a stair is provided between the scaffold and the pin connection. And a rear end of the parallel link and the column are connected to each other via a hydraulic cylinder.