JPH08198002A - High lift work device - Google Patents

Abstract

PURPOSE: To provide a high lift work device equipped with various auxiliary devices so as to facilitate maintenance work of the device having a complicated shape in a high lift position. CONSTITUTION: This device is provided with an elevating floor 3 elevated by a scissorlike link, a first extending floor 8 housed in the rear of the elevating floor 3 and retractable fore and aft, a first floor extending means 9 for extending and retracting the first extending floor 8, and an angle changing means 10 for changing the angle of the first extending floor 8 fore and aft center shaft X of the elevating floor 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work device at high places, and more particularly to a work device at high places used for engine maintenance and inspection of aircraft.

[0002]

2. Description of the Related Art A conventional aerial workbench is provided with a pair of left and right horizontal floors 51 extending by hydraulic pressure on the left and right sides of the rear portion of the workbench 50, as shown in FIG. The floor is provided with a vertical floor 52 that is cut diagonally according to the shape of the engine 59.
Further had an auxiliary step 53 that expands and contracts in the left-right direction inside. This aerial work platform approaches and stops immediately behind the engine from the rear, then raises the work platform 50 to the required height, then extends the horizontal floor 51 laterally, and then the vertical floor 52 of the engine. It was extended so as to sandwich the pylon 54, and auxiliary floors were used to create working floors on both sides of the pylon without any gaps (Jpn. 4-167).
No. 55).

[0003]

The conventional work platform for high places (shown in FIG. 5) can be installed at a high place according to the complicated shape of the work piece. However, it is difficult to drive this aerial work platform backwards, bring it close to the immediate rear of the aircraft engine, and place the vertical floor close to each other so as to sandwich the pylon of the engine. Further, since the angle of the vertical floor is fixed, there is a possibility that the outer wall of the engine may be damaged when extending between the engines of the aircraft. In addition, manually extending the auxiliary steps on both sides of the pylon without any gap is a work at a high place, which causes a great load. In view of the problems of the prior art, it is a technical object of the present invention to provide a working device that can easily perform maintenance work of a device having a complicated shape at a high place. Further, another object of the present invention is to provide an aerial work apparatus provided with various auxiliary devices so that work can be easily performed at a high place.

[0004]

SUMMARY OF THE INVENTION An aerial work apparatus of the present invention comprises a lift floor that moves up and down, a first extension floor that is housed in the rear portion of the lift floor and extends and retracts back and forth, and the first extension. First floor extending means for expanding and contracting the floor,
Angle changing means for changing the angle of the first extension floor with respect to the front-rear center axis of the elevating floor. The angle changing means of this aerial work apparatus has one end pivotally attached to the lower portion of the elevating floor and the other end having the first portion.
It is preferably a hydraulic cylinder pivotally attached to the floor extension means. Further, it is preferable that the first extension floor is rotatable around a rotation axis provided perpendicularly to the first floor extension means, and the first extension floor is provided on both sides of the elevating floor. Two units are preferably provided. Further, it is desirable that the aerial work apparatus be provided with a second extension floor that is housed in the side portion of the lifting floor and expands and contracts to the side. The lifting floor is provided on the self-propelled carriage. Is desirable. It is also desirable that a lifter is provided at the front part of the lifting floor and that a crane device is provided at the top of the lifting floor.

[0005]

When the aerial work apparatus of the present invention is used for maintenance work of an engine of an aircraft, approach and stop immediately behind the aircraft engine from the rear, then raise the lifting floor to the required height, and then The first extension floor, which is set at a certain angle with respect to the center axis of the lifting floor of the aerial work equipment, is extended behind the aerial work equipment so as to sandwich the pylon of the aircraft engine. In this case, by setting the angle of the first extension floor in advance according to the width of the engine of the aircraft, the work of extending the work device rearward becomes easy. Alternatively, set a large angle in advance,
If the angle is narrowed after sandwiching the engine pylon, the outer wall of the engine will not be damaged. Then, if necessary, the second extension floor is extended. Further, since the working apparatus for high places of the present invention is provided with the lifter, when working on the ascending / descending floor at a high place, the lifter is used to carry tools and parts on the ground. further,
Since the aerial work apparatus of the present invention is equipped with a crane apparatus, it is used for removing or attaching a propeller or the like to reduce the work. At the end of the work, the first and second extension floors are stored under the lifting floor.

[0006]

【Example】

(Embodiment 1) Next, an embodiment of an aerial work apparatus of the present invention will be described with reference to FIGS. FIG. 1 is a plan view showing the whole aerial work apparatus of the present invention, and FIG. 2 is a side view thereof.
FIG. 3 is a rear view thereof, and FIG. 4 is a plan view and a front view showing a state of rotation of the second extension floor. 1 to 4, A is a work implement for high places, 1 is a self-propelled carriage, and 2 is a first frame, which is provided on the self-propelled carriage 1. Reference numeral 3 denotes an elevating floor, which is moved up and down by a known scissor-shaped link 4. Reference numerals 5 and 6 are an inside link and an outside link, respectively, which constitute the scissors-shaped link 4, and the rear ends thereof are
Each of the first frame 2 and the lifting floor 3 is rotatably and pivotally attached to the rear portion by a pin, and its front end portion is
It slides in the 1st frame 2 and the rail provided in the lower part of the raising / lowering floor 3, respectively. The inside link 5 and the outside link 6 are rotatably pivotally attached by a pin at the central portion. The hydraulic cylinder (not shown)
One end is the inside link 5 and the other end is the first frame 2
And is capable of moving up and down while maintaining the elevating floor 3 in parallel with the self-propelled carriage 1. The lifting mechanism for the lifting floor has been described by taking the scissor-shaped link mechanism as an example.
Alternatively, hydraulic cylinders may be provided at the four corners of the lifting floor to raise and lower.

First elongate floors 8 and 8 are provided on the lower left and right of the rear part of the elevating floor 3, and first floor elongating means 9 and
9 independently extends backward by an arbitrary length. As the extending means, a known means such as a hydraulic cylinder, a screw mechanism, a rail and a wheel, a rack and a pinion can be used. In the case of a hydraulic cylinder, one end is pivotally attached to a specific portion of the lower portion of the lifting floor 3 and the other end is pivotally attached to a specific portion (for example, a central portion) of the lower portion of the first extension floor 8. In the case of the screw mechanism, a long screw shaft is pivotally attached to the lower part of the elevating floor 3, a female screw part is provided on the lower part of the first extension floor 8, and the female screw part is screwed onto the screw shaft. Then, the first extension floor 8 is expanded and contracted by the rotation of the screw shaft.

Also, each first extension floor 8, 8
Has angle changing means 10 and 10 for changing the horizontal angle of the first extension floor, and the angle changing means 10 and 10 are independent of each other.
It is possible to change the opening / closing angle of the extension floors 8, 8. That is, the angle θ is changed with respect to the front-rear center axis X of the lifting floor in FIG. Known means such as a hydraulic cylinder and a screw mechanism can be used as the angle changing means.
In the case of a hydraulic cylinder, one end is pivotally attached to a specific portion of the lower portion of the lifting floor 3, and the other end is pivotally attached to a specific portion (for example, a central portion) of a base cylinder (a cylinder that does not expand and contract) of the first floor extending means 9. To wear. That is, this hydraulic cylinder expands and contracts in a direction substantially perpendicular to the first floor extending means 9. In the case of a screw mechanism, a screw shaft (one of which is provided at a right angle to the base cylinder) whose one end is pivotally attached to a specific portion of the lower part of the lifting floor 3
A female screw portion that is screwed onto the screw shaft may be provided on the base cylinder of the first floor extending means 9. In the above description, two first extension floors are installed, but they may be installed on only one side. Further, by arranging an appropriate number of collision prevention sensors around the first extension floor 8, it is possible to prevent a collision when the first extension floor 8 is extended. A magnetic proximity switch, a photoelectric tube or the like is used for this sensor.

Further, the first extension floor 8 is centered on a rotary shaft 11 provided perpendicularly to the first floor extension means 9,
It can be rotated in the direction of arrow S in the horizontal plane. That is, the first extension floor 8 can be rotated by manual operation, but can also be rotated by remote operation. In this case, for example, an arcuate rack 41 is provided below the first extension floor 8, a pinion 42 is provided on the first floor extension means 9 so as to mesh with the rack 41, and the pinion 42 is rotated forward and backward. By doing so, the first extension floor 8
Can be rotated in the direction of arrow S. A drive source such as a hydraulic cylinder, a hydraulic motor, or an electric motor is used to rotate the pinion 42. Besides, instead of using the pinion, the hydraulic cylinder is used to move the first extension floor to the arrow S.
Can be rotated in any direction.

Further, at the lower part of the side portion of the lifting floor 3, a second
The extension floor 21 is provided, and the second floor extension means 22 for extending the second extension floor 21 allows the extension floor 21 to be extended to the side of the elevating floor 3 by an arbitrary length. As the extending means, a known means such as a hydraulic cylinder or a screw mechanism can be used. In the case of a hydraulic cylinder, one end is pivotally attached to a specific place under the lifting floor 3,
The other end is pivotally attached to a specific portion under the second extension floor 21 (for example, on both sides in the longitudinal width direction). In the case of the screw mechanism, a long screw shaft is pivotally attached to the lower portion of the elevating floor 3 (for example, on both sides in the longitudinal width direction), a female screw portion is provided on the lower portion of the second extension floor 21, and a female screw portion is provided on the screw shaft. Screw it in. Then, by rotating the screw shaft, the second extension floor 21 can be expanded and contracted at an arbitrary length. Further, by arranging an appropriate number of collision prevention sensors around the second extension floor 21, it is possible to prevent a collision during extension. A magnetic proximity switch, a photoelectric tube or the like is used for this sensor.

A lifter 13 is provided at the front part of the lift floor 3, and a lift base 14 is provided at an upper position when the lift floor 3 is lifted by a lifter hydraulic cylinder 15 provided at a lower portion of the lifter 13. , Elevates to and from the floor position of the self-propelled carriage 1. Instead of the lifter hydraulic cylinder 15, a known mechanism such as a screw mechanism or a wire rope type elevator device can be used. This lifter 1
By using 3, the burden on the operator for carrying maintenance tools, parts, etc. is reduced. In addition, when the operator moves back and forth between the lift floor 3 already in the raised position and the ground, he / she can ride on the lift base 14 of the lifter 13 to move up and down.

A base 31 of a crane device 30 having a telescopic cylinder 32 is provided above the lifting floor 3, and the tip end of the crane device 30 can be rotated 360 degrees about the base 31 as a central axis. Is possible. Telescopic tube 3
A hook 33 that is raised and lowered by winding up and down the wire rope is provided at the tip of the wire 2. Further, the base 31 is provided with a hydraulic cylinder for changing the elevation angle of the crane device 30, and the vertical angle of the crane device 30 can also be changed. By using this crane device 30, removal of helicopter propellers,
Installation work becomes easy. It can also be used for maintenance work such as replacement of other engine parts.

[0013]

Since the aerial work apparatus of the present invention is provided with an elevating floor which can be raised and lowered to an arbitrary height, the work floor can be raised to a desired height for work. Further, since the work floor which can be expanded and contracted backward and sideways is provided as an auxiliary, there is no danger that an operator leans out and works. Further, since this telescopic work floor has the collision prevention sensor, it does not damage the object. Further, since the working device for high places of the present invention is provided with the lifter, when working on the ascending / descending floor at high places, the lifter can be used to carry tools, parts and the like on the ground. Further, the aerial work apparatus of the present invention is provided with a crane device, and therefore can be used for removing and attaching a propeller or the like to reduce the work.

[Brief description of drawings]

FIG. 1 is a plan view showing an entire aerial work apparatus of the present invention.

FIG. 2 is a side view showing the whole aerial work apparatus of the present invention.

FIG. 3 is a rear view showing the whole aerial work apparatus of the present invention.

FIG. 4 is a plan view and a front view showing a state of rotation of a second extension floor.

FIG. 5 is a plan view of a conventional work platform for high places.

[Explanation of symbols]

 A: High-altitude work device 1 ... Self-propelled trolley 3 ... Lifting floor 8 ... First extension floor 9 ... First floor extension means 10 ... Angle changing means 11 ...・ Rotating shaft 13 ・ ・ ・ Lifter 21 ・ ・ ・ Second extension floor 22 ・ ・ ・ Second floor extension means 30 ・ ・ ・ Crane device

Claims (8)

[Claims] 1. An up-and-down floor which moves up and down, a first extension floor which is housed in a rear portion of the up-and-down floor and extends and retracts forward and backward, a first floor extension means for extending and retracting the first extension floor, and the first extension floor. An aerial work apparatus provided with angle changing means for changing the angle of the extension floor 1 with respect to the front-rear center axis of the lifting floor. 2. The angle changing means is a hydraulic cylinder having one end pivotally attached to a lower portion of the lifting floor and the other end pivotally attached to the first floor extension means. The aerial work apparatus according to claim 1. 3. The first extension floor is rotatable about a rotation axis provided perpendicularly to the first floor extension means, according to claim 1 or 2. Aerial work equipment. 4. The aerial work apparatus according to claim 1, wherein two first extension floors are provided on both sides of the elevating floor. 5. The aerial work apparatus according to claim 1, further comprising a second extension floor which is housed in a side portion of the elevating floor and is capable of expanding and contracting laterally. 6. The aerial work apparatus according to claim 1, wherein the elevating floor is provided on a self-propelled carriage. 7. The aerial work apparatus according to claim 1, wherein a lifter is provided at a front portion of the lifting floor. 8. The aerial work apparatus according to claim 1, wherein a crane device is provided above the lifting floor.