JPS6227298A - Lifting type height service car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention provides a telescopic mast which is installed on a vehicle so as to be freely adjustable in terms of turning and raising and lowering, and a telescopic mast which is attached to the telescopic mast so that it can be raised and lowered along the telescopic mast. This invention relates to a lift-type aerial work vehicle that is equipped with a platform for a worker to board.

(Prior art) This type of lift-type aerial work vehicle can move the platform along the wall surface to be worked on by arranging the telescopic mast along the wall surface to be worked on and adjusting the platform up and down. It can be used very rationally for wall work on ship hulls or buildings.

By the way, as shown in FIG. 1, a conventional lift-type aerial work vehicle of this type includes a vehicle 1, a swivel platform 2 mounted on the vehicle 1 so as to be adjustable in rotation, and a swivel platform 2 that is erected upright on the swivel platform 2 in a manner that can freely adjust its elevation. It is composed of a telescoping mast 3 that is driven up and down by a hoisting drive device, and a platform 5 for boarding a worker that is attached to the telescoping mast 3 so as to be adjustable up and down along the telescoping mast 3 and driven up and down by an appropriate hoisting drive device. has been done. The hoisting drive device 4 includes a swivel base 2 and a telescopic mast 3.
It consists of a hydraulic cylinder installed between the appropriate locations. When working on a wall, the swivel table 2 is rotated to make the platform 5 face the work target wall B, and the telescopic mast 3 is adjusted in elevation to set it at an appropriate angle. By moving the vehicle 1, the relative distance between the platform 5 and the wall surface B to be worked on is adjusted to a distance that makes it easy for the worker on the platform 5 to work. The work is performed by extending and contracting the telescopic mast 3 and raising and lowering the platform 5.

(Problems to be Solved by the Present Invention) However, in the above-mentioned conventional lift-type aerial work vehicle, the relative distance between the platform 5 and the wall surface B to be worked on is adjusted to a distance that makes it easy for the worker on the platform 5 to work. Since the adjustment work is performed only by the traveling movement of the vehicle 1, shocks caused by irregularities in the road surface or when the elevating aerial work vehicle starts or stops traveling immediately cause the elevating aerial work vehicle to shake. As a result of being doubled at the tip of the telescopic mast 3, if the platform 5 is located near the tip of the telescopic mast 6, the platform 5 collides with the work target wall B or the platform 5 and the work target wall B
There is a danger that workers may have their hands or feet caught between them. For this reason, with conventional lift-type aerial work vehicles,
This method has a disadvantage in that it is difficult to bring the platform 5 close to the wall surface B to be worked on.

The present invention seeks to solve the above-mentioned drawbacks of the prior art.

(Means for Solving the Problems) The present invention solves the above-mentioned drawbacks of the prior art by moving the vehicle 1 to a vertical height even when the relative gap between the platform 5 and the work target wall B is slightly adjusted. Focusing on the fact that this is due to the fact that the entire working vehicle must be moved, it is possible to horizontally move the telescopic mast 3 within a certain range while maintaining its upright posture without moving the vehicle 1. The aim is to provide a lift-type aerial work vehicle. In other words, the lift-type aerial work vehicle of the present invention has a telescoping frame attached to a rotating base so as to be horizontally telescopic.A telescoping mast is attached to the tip of the telescoping frame so as to be movable up and down. The present invention is characterized in that a levying device is provided between the attached packet and a suitable position between the telescopic mast and the telescopic frame, and drives the telescopic mast to raise and lower.

(Function) The lift-type aerial work vehicle of the present invention configured as described above has the following features:
When the platform is brought close to the wall surface B to be worked on, it is done as follows.

↓ In other words, by rotating the swivel table so that the platform faces the work target wall B, even if the platform shakes due to irregularities in the road surface or shocks when the lift-type aerial work vehicle starts and stops running, the platform remains stable. The vehicle axis is moved to a distance where the platform does not come into contact with the work target wall B. After that, the telescopic frame is extended from the rotating base on the vehicle to bring the platform closer to the work target wall B, and the platform is moved by slight movement. can be easily brought close to the work target wall surface B1ζ.

Therefore, minute adjustments to the relative gap between the platform and the work target wall B can be made by extending the telescoping frame without moving the vehicle. After that, move the telescopic mast to the height of the work target position and platform 8.
Work is carried out by raising and lowering the

(Example) Based on FIG.
0 is omitted). Reference numeral 11 denotes a telescopic frame, which is made up of a pair of left and right outer boxes 12 horizontally attached to the rotating base 10 and a pair of left and right inner boxes 13 fitted into the outer boxes 12. The outer box 12 and the inner box 13 are connected by a hydraulic cylinder (not shown), and the left and right extendable frames 11 and ζ are arranged respectively, and the left and right hydraulic cylinders are driven in conjunction with each other.

Therefore, the inner box 13 can be telescopically moved within the outer box 12 by the telescopic drive of the hydraulic cylinder. Reference numeral 14 denotes a proximal support 15 whose base end is pivotally connected to the distal ends of the left and right inner boxes 13, and this proximal support 1.
5 and a distal end support 16 telescopically engaged with the
This is a telescopic mast that is driven to extend and contract by a telescopic device 17 (in this case, a hydraulic cylinder) disposed between a proximal support column 15 and a distal support column 16. Reference numeral 18 denotes a levitation device, which is composed of a bending support 19 and a levitation cylinder 20. The bending support 19 is pivotally connected between the tip of the proximal support 15 of the telescoping mast 14 and a proper position in the inner box 13, and the bending support 19 is bent between its distal and proximal sides. is pivotally connected at its proper location.

A pair of left and right lifting cylinders 20 are pivotally connected between the proximal end of the proximal support column 15 and the bending column 19 at appropriate positions, and are used to raise and lower the telescopic mast 14 by extending and contracting the cylinders. A bracket 21 is protruded from the upper part of the left and right outer boxes 14, and is fixed to the upper part of the left and right inner boxes 13 and pivotally connects one end of the bending support 19. When the inner box 13 expands and contracts, the bracket 21 also moves. The left and right outer boxes 12 are provided with an elongated upper part in the longitudinal direction so that they can be moved. 22 is
The first platform is guided by the distal support column 16 and is movable up and down between the distal end and the base end of the distal support column 16. Pulleys (or sprockets) 23 are pivotally mounted on the left and right sides of the tip of the tip side strut 16,
A wire rope (or chain) 24 is wound around the left and right pulleys (or sprockets) 23 in an inverted U shape, one end of which is fixed to the distal end of the proximal support column 15, and the other end is attached to the first platform. It is fixed to 22.

Therefore, the first platform 22 can be moved up and down between the distal end and the proximal end of the telescopic mast 14 by expanding and contracting the telescopic device 17. 25 is
The second platform is guided by the telescopic mast 14 and is movable up and down between the distal end and the proximal end of the telescopic mast 14, and is disposed below the first platform. Reference numeral 28 denotes a lifting pulley (or sprocket) which is movable up and down, and is guided by the distal end support 16 of the telescopic mast 14 and is movable up and down between the distal end and base end of the distal end support 16. A pair of pivots are connected at the left and right ends. Reference numeral 27 denotes a hydraulic cylinder, which is disposed between the guide 26 and the proximal support column 15, and is configured to move the lifting pulley (also 2? a sprocket) up and down by driving the hydraulic cylinder 27 to expand and contract. It has become. Reference numeral 29 denotes a 20th chain (or chain), which is hooked around the left and right lifting pulleys (or sprockets) 28 in an inverted U shape, with one end attached to the tip of the proximal column 15, and the other The ends are each fixed to the second platform 25. Therefore, the second platform 25 is guided by the telescopic mast 14 and moved up and down by driving the hydraulic cylinder 27 to extend and contract. Also, the first and second platforms 22.25 are horizontal control devices r!
1 (not shown), so that even if the telescopic mast 14 is tilted, it will always remain horizontal.

Next, the effect will be explained.

The first and second platforms 22, 25 are turned to face the work target wall B, and the telescopic mast 14 is moved to an appropriate angle by driving the undulation cylinder 20 to extend and retract the undulating mast 14 to adjust the undulation. Set to .

Then, the first and second platforms 22.25 will be at a distance where the first and second platforms 22.25 will not come into contact with the work target wall surface B even if the elevating type aerial work vehicle shakes due to unevenness of the road surface or shocks when the elevating type aerial work vehicle starts and stops running. The vehicle 9 is driven to bring the I and second platforms 22, 25 closer to the wall surface B to be worked on. Next, the inner box 13 of the telescopic frame 11 is extended from the outer box 12, and the first or second platform 22, 25 is brought close to the work target position. Thereafter, the first or second platform 22.25 on which the worker is riding is driven to extend or contract by the telescoping device 17 or the telescoping device 17 and the hydraulic cylinder 27 to move the first or second platform 22.25 up to the work target height of the work target wall surface B. The work is performed by positioning the forms 22 and 25. Since it is performed as described above, it is possible to make minute adjustments to the relative gap between the first and second platforms 22, 25 and the work target wall B by extending the telescoping frame 11 without moving the vehicle 9. It becomes.

As shown in FIG. 3, the lift-type aerial work vehicle described above can lower the telescoping mast 14 by folding the bending support 19 using the lifting cylinder 20.

In other words, when driving, the vehicle lowers its posture so that it can travel stably.

Further, in the above embodiment, the telescoping mast 14 is supported by the bending struts 19 so that a large force is not applied to the undulating cylinder when the telescoping mast 14 is erected in a substantially upright state. Instead of the bending struts 19, undulation cylinders may be directly arranged.

Further, although the above embodiment has a structure that uses two platforms, it is also possible to use a lift-type aerial work vehicle consisting of one platform.

(Effects of the Invention) Since the present invention is configured and operates as described above,
The platform can be easily brought very close to the wall B to be worked on, and the platform can be moved very close to the wall B to be worked on while the vehicle is running. The work can be carried out safely without the risk of the platform colliding with the work target wall B due to the shock shaking the lift-type aerial work vehicle, or of the worker getting his or her hands or feet caught between the platform and the work target wall B. The effect is great.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is an explanatory diagram of a conventional elevating type aerial work vehicle, and Figs. 2 and 3 are explanatory diagrams of an elevating type aerial working vehicle according to the present invention. 9; Vehicle, 10; Swivel base, 11; Telescoping frame, 14; Telescoping mast, 22. 25; Platform, 18; Lifting device

Claims (1)

[Scope of Claims] Vehicle: A rotating base mounted on the vehicle so as to be freely swingable. A telescoping frame mounted on the swinging base so as to be able to expand and contract in the horizontal direction. 1. A lift-type aerial work vehicle, comprising: a platform attached to the platform so that it can be raised and lowered; and a hoisting device that is provided between the telescopic mast and the telescopic frame and drives the telescopic mast to raise and lower.