JP2002326794A - Swing preventing structure of vehicle for high lift work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle for high lift work allowing a stable high lift work by reducing the lateral swing of a lifting device formed of at least one flat link mechanism vertically extending from the upper side of the deck along one plane. SOLUTION: In this swing preventing structure of the vehicle for high lift work, the lifting devices 130 and 140 are disposed on the deck 121 in x and y directions orthogonal to each other, and stop plates 210 and recessed rails 220 of a recessed rail type connection part 200 are fitted to each other through rails so as to connect a working bucket 150 to an elevator 160 in the vehicle for high lift work 100 in which the working bucket 150 and the elevator 160 are liftably supported on the lifting devices 130 and 140 formed by arranging two scissors link mechanisms parallel with each other on the deck 121.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-sway structure for an aerial work vehicle having a plurality of lifting / lowering devices including at least one flat link mechanism which expands and contracts in a plane from above a chassis.

[0002]

2. Description of the Related Art Generally, an aerial work vehicle is provided with a plurality of elevating devices including at least one planar link mechanism that expands and contracts in a plane from above a chassis, and each of these elevating devices transports an operator. It supports elevators used for aircraft, work platforms used for repair and inspection of aircraft, or transport containers (containers) for transporting food and luggage, for example, aircraft maintenance and loading food and luggage inside the aircraft Used to

On the other hand, as a planar link mechanism, for example,
A scissor-like link mechanism in which two link bars intersect and the intersection is rotatably connected, a so-called scissor link mechanism, is known. It expands and contracts in a plane (hereinafter referred to as a link surface).

[0004]

However, such a flat link mechanism has a mechanism that expands and contracts in a plane.
There is a disadvantage that the sway hardly occurs in a direction along the link surface (hereinafter, referred to as a horizontal direction), but a large sway occurs in a direction perpendicular to the link surface (hereinafter, referred to as a vertical direction) as compared with the horizontal direction. is there.

[0005] For this reason, there is a disadvantage that pitching occurs even with an elevating device employing a flat link mechanism, and when carrying out precise work such as maintenance of an aircraft on a raised workbench, or transporting a load that does not like shaking. In consideration of such factors, it is necessary to prevent the vertical link mechanism from pitching.

The present invention has been made in view of the above-mentioned facts, and reduces a vertical swing generated in an elevating device including at least one planar link mechanism that expands and contracts in a plane from above a chassis. An object of the present invention is to provide an aerial work vehicle that enables stable aerial work.

[0007]

According to a first aspect of the present invention, there is provided an anti-swing structure for an aerial work vehicle, comprising at least one planar link mechanism which expands and contracts in one plane from above a chassis. Comprising a plurality of lifting devices consisting of, in each of these lifting devices, an elevator, a workbench or a work platform supporting at least one of the transport container,
It is characterized in that adjacent lifting devices are arranged orthogonally on a chassis, and a connecting means for connecting an elevator, a work table or a transport container supported by these lifting devices is provided.

According to a second aspect of the present invention, in the above-mentioned first aspect, the connecting means is preferably a rail fitting along the height direction of the vehicle.

According to a third aspect of the present invention, the anti-swing structure for an aerial work vehicle according to the first or second aspect of the present invention detects that the elevator, the workbench or the transport container is at a height connectable thereto. It is preferable to provide a height detecting means for detecting the height.

According to a fourth aspect of the present invention, in the anti-swing structure for an aerial work vehicle, in the invention according to any one of the first to third aspects, the planar link mechanism is preferably a scissor-like link mechanism.

According to a fifth aspect of the present invention, there is provided an anti-swing structure for an aerial work vehicle according to any one of the first to fourth inventions, wherein the aerial work vehicle comprises: a lifting device for supporting an elevator; It is preferable that the vehicle is a tandem-type aerial work vehicle including a lifting device that supports the table.

[0012]

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a top view showing a first embodiment of an aerial work vehicle having a rocking structure according to the present invention from above, FIG. 2 is a side view showing FIG. ₁ from the direction D1, and FIG. rear view of the the D ₂ direction, FIG. 4,
Figure 1 is a front view showing the D ₃ direction.

The aerial work vehicle 100 is provided with two elevating devices 1 on a chassis 121 integrally extending from the rear of the driver's seat 110.
It is a tandem-type aerial work vehicle equipped with 30, 140.
The lifting devices 130 and 140 respectively support an aerial work platform 150 used for aircraft maintenance and an elevator 160 capable of carrying a worker and relatively small luggage with respect to the chassis 121 so as to be able to move up and down.

As shown in FIG. 3, the elevating device 130 has two flat link mechanisms 130a and 130b arranged side by side on a chassis 121.
2 is a scissors-like link mechanism in which two link bars cross each other as shown in FIG.

Referring to FIG. 2, scissor link mechanism 1
30a has four link bars 131a to 134a.
The two intersecting link bars 131a and 132
a, two intersecting link bars 133a and 134a
To each pin P₁, P_TwoRotatably connected by
Ends of the link bars 131a and 133a facing each other
Section, link bars 132a and 134 facing each other
a pin P _Three, P_FourRotatably connected
The link bars are pin P₁~ P_FourWeek
By rotating the plate in a plane parallel to the plane of FIG.
(Hereinafter referred to as the first link surface) extending in the vertical direction of the vehicle.
Shrink.

Similarly, the scissors link mechanism 130b has a 4
Of the two link bars 131b to 134b
The two link bars 131b and 132b and the two intersecting link bars 133b and 134b are
_1, P ₂ by rotatably connected to the ends of the link bars 131b and 133b face each other, which was rotatably connected by a link bar 132b and the end portion of each pin P ₃ of 134b, P ₄ face each other By rotating a plurality of link bars around the pins P _{1 to} P ₄ , the first link plane expands and contracts in the vertical direction of the vehicle.

For this reason, the scissors link mechanism 130a,
130b are interlocked by common pins P ₁ to P _4, the first
It is possible to expand and contract within the link plane in the vehicle height (vehicle height) direction h.

The scissor link mechanisms 130a, 130
b is the link bar 132a, and the hydraulic cylinder 170 is interposed between 132b, link bars 133a, link bar 134a is attached slidably with respect to chassis 121 by a pin P ₅ the lower end of the 133b, the pin P and the lower end of 134b ₆ while attached so as to be rotatable with respect to the chassis 121 by a link bar 131a, linked together by a pin P ₇ the upper end of 131b slidably attached to the bottom surface of the aerial platforms 150 bar 132a, 13
2b with the pin P ₈
To be rotatable.

As a result, the elevating device 130 is expanded and contracted by the hydraulic cylinder 170 attached between the scissor link mechanisms 130a and 130b, and the aerial work platform 150 is moved to the chassis 1
21 can be raised and lowered. The elevating device 130 may be a device that controls the scissor link mechanisms 130a and 130b synchronously by a computer or the like without using a common pin.

As shown in FIG. 2, the elevating device 140 also has two planar link mechanisms 140a and 140b arranged side by side on a chassis 121, and these planar link mechanisms 140a and 140b are arranged in parallel.
Reference numeral 0b denotes a scissors link mechanism in which two link bars cross each other as shown in FIG.

Referring to FIG. 4, the scissors link mechanism 1
Reference numeral 40a denotes two crossing link bars 141a and 142 among the six link bars 141a to 146a.
a, two intersecting link bars 143a and 144
a, two intersecting link bars 145a and 146a
Are rotatably connected by pins P ₉ , P ₁₀ , and P ₁₁ (see FIG. 2), and link bars 141 facing each other.
end of the a and 143a, the ends of the link bars 142a and 144a face each other, the link bars 144a and the end portion of the 145a, the link bars 143a and 146a end of each pin P ₁₂ of facing each other facing each other, P _13, P ₁₄ is obtained by rotatably connected by P _15, by rotating the six link bar about the pin P ₉ to P _15, Figure 4 of the paper parallel to a plane (hereinafter, referred to as a second link surface ) Expands and contracts in the vertical direction of the vehicle.

Similarly, the scissor link 140b includes two intersecting link bars 141b and 142b, two intersecting link bars 143b and 144b, and two intersecting link bars 145b and 146b among the four link bars 141b to 146b. Pins P ₉ , P
_10, P ₁₁ by rotatably connected to the ends of the link bars 141b and 143b face each other, the ends of the link bars 142b and 144b face each other, the ends of the link bars 144b and 145b face each other, facing each other link bar 143b And 146
b are rotatably connected by pins P ₁₂ , P ₁₃ , P ₁₄ , and P ₁₅ , respectively. By rotating the four link bars around the pins P _{9 to} P ₁₅ , the second link b is rotated. Extends in the link plane in the vertical direction of the vehicle.

For this reason, the scissor link mechanism 140a,
140b are interlocked by common pins P ₉ to P _15, it is possible to stretch the second link plane in the vehicle height direction h.

The scissor link mechanisms 140a, 140
b, a hydraulic cylinder 180 is interposed between the link bars 143a and 143b, the lower ends of the link bars 145a and 145b are slidably attached to the chassis 121, and the lower ends of the link bars 146a and 146b are rotated with respect to the chassis 121. Movably mounted while link bar 141
a, by a pin P ₁₆ of the upper end of the 141b elevator 16
0 of link bars 142a is attached slidably with respect to the bottom surface, attached pivotally by a pin P ₁₇ the upper end of the 142b with respect to the bottom surface of the elevator 160.

As a result, the elevating device 140 expands and contracts by the hydraulic cylinder 180 attached between the scissor link mechanisms 140a and 140b, and moves the elevator 160 to the chassis 1
21 can be raised and lowered. The elevating device 140 may also be a device in which the scissors link mechanisms 140a and 140b are synchronously controlled by a computer or the like without using a common pin.

In this embodiment, as shown in FIGS. 2 to 4, the adjacent lifting devices 130 and 140 are moved in the x and y directions as shown in FIG.
As shown in FIGS. 1 and 2, a concave rail type connecting portion 200, which is a first embodiment of a connecting means for connecting an aerial work platform 150 and an elevator 160, is provided orthogonally on a chassis 121.

FIGS. 5A and 5B are a perspective view showing a state in which the connection of the concave rail type connecting section 200 is completed and a perspective view showing a state in which the connection of the concave rail type connecting section 200 is released. , FIGS. 6A and 6B respectively show FIG.
It is a side view of (a), (b).

The concave rail-type connecting portion 200 is connected to the elevator 1
60 and a work platform 150
The recessed rail 220 provided on the side surface of the vehicle is disposed at a position facing the recess, and the work platform 150 and the elevator 160
, That is, the height h ₁ at which the floor surfaces of the aerial work platform 150 and the elevator 160 are flush with _{each other} (FIG. 2)
), The rails are fitted along the height direction h.

As shown in FIG. 5, the stop plate 210 has a plate body 211 and a guide shaft 212 connecting the plate body 211 and the elevator 160. The plate body 211 has tapered ends 211t at both ends to facilitate introduction into the concave rail 220. Further, the concave rail 220 has two ribs 221 integrally, and the plate main body 211 of the stopper plate 210 is fitted in the concave rail 220 by these ribs 221. A taper 221t is formed near both ends of the rib 221 to facilitate the introduction of the guide main shaft 212 of the stopper plate 210.

Here, the operation of the concave rail type connecting portion 200 will be described.

As shown in FIG. 2, the aerial work vehicle 100 according to the present embodiment is fixed to the ground by extending a hydraulic jack 122 provided on a chassis 121 and then extended to the aerial work platform 15.
1 is positioned at a high place by extension of the elevating device 130, as shown in FIG. 1, the slide floors 151a, 151b built in the high work table 150 are pulled out in the x direction toward the body or engine of the aircraft. Do the work.
For this reason, after the slide floors 151a and 151b are stored, the aerial work platform 150 is not lowered to get on the elevator 160 from the elevating stairs 161 so that the tools and parts do not have to be taken to the ground. To lift workers, tools, parts and other luggage
Transport to 50. In addition, moving or carrying in to the aerial platform 150 is performed by the aerial platform 150 and the elevator 160.
Through the opening / closing doors 152 and 162 provided in the above.

At this time, when the aerial work platform 150 and the elevator 160 reach the same height position h ₁ , the stop plate 210 provided on the elevator 160 is moved to the aerial work platform 150.
Is fitted along the height direction h to the concave rail 220 provided at the bottom.

For this reason, when swinging occurs in a direction (x direction) orthogonal to the first link surface of the lifting device 130, that is,
When the vertical movement of the lifting device 130 occurs, the rigidity of the lifting device 140 in the direction (x direction) along the second link surface, that is, the lateral rigidity of the lifting device 140 can be suppressed. In the case where the swing in the direction (y direction) orthogonal to the second link surface of the lift device 140 occurs, that is, in the case where the lift device 140 swings in the vertical direction, the lift device 13
The rigidity in the direction (y-direction) along the first link surface of 0, that is, the lateral rigidity of the lifting device 130 can be suppressed.

That is, in the present embodiment, the lifting device 1
30 and 140 are arranged orthogonally on the chassis 121 as shown in the x and y directions, and the aerial work platform 150 and the elevator 160 supported by these lifting and lowering devices 130 and 140 are connected by the concave rail type connecting portion 200. Lifting device 13
0, 140 in the vertical direction.
It can be suppressed by the lateral rigidity of 0,130. Therefore, according to the present embodiment, the vertical swing of the elevating devices 130 and 140 is reduced, and the work such as repair and inspection at a high place and the transport of the load can be performed in a stable state.

FIG. 7 shows a second embodiment of the connecting means for connecting the vertically-moving devices 130 and 140 at right angles to the platform 121 and connecting the aerial work platform 150 and the elevator 160 as shown in FIGS. It is a perspective view showing the state where connection of a certain convex rail type connection part 310 was released.

The convex rail type connecting portion 300 is connected to the elevator 1
60, a raised rail 310 provided on the side surface,
A concave plate 320 provided on the side of the 0 are those arranged at a position facing, as in the first embodiment, at the height h ₁ aerial platforms 150 and elevators 160 are equal to each other, the height direction h Along the rail.

The convex rail 310 has a cylindrical rail main body 311 and a guide shaft 312 connecting the rail main body 311 and the high work table 150. Rail body 31
1 is formed with a taper 311t at both ends to facilitate introduction into the concave plate 320. Recess 32
0 has two ribs 321 integrally, and these ribs 3
With 21, the rail main body 311 of the convex rail 310 is fitted in the recess 320. Note the clearance C between the rib 321 is wider than the width C ₁ of the guide main shaft 312 in order to facilitate introduction of the guide main shaft 312 of the convex rail 310.

Here, the operation of the convex rail type connecting portion 300 will be described.

As in the first embodiment, when the elevator 160 is raised and the aerial work platform 150 and the elevator 160 are at the same height position h ₁ as in the first embodiment, the convex rails provided on the elevator 160 The rail 310 is fitted in the recess 320 provided in the high work table 150 along the height direction h. For this reason, when the vertical movement (x direction) occurs in the elevating device 130, the rigidity in the horizontal direction (x direction) of the elevating device 140 can be suppressed. ),
The rigidity in the horizontal direction (y direction) of the lifting device 130 can be suppressed.

That is, in the present embodiment, the lifting device 1
30 and 140 are arranged orthogonally on the chassis 121 as shown in the x and y directions, and the aerial work platform 150 and the elevator 160 supported by the lifting and lowering devices 130 and 140 are connected by the convex rail type connecting portion 300. Lifting device 13
0, 140 in the vertical direction.
It can be suppressed by the lateral rigidity of 0,130. Therefore, according to the present embodiment, the vertical swing of the elevating devices 130 and 140 is reduced, and the work such as repair and inspection at a high place and the transportation of the load can be performed in a stable state.

Incidentally, according to the first and second embodiments, the concave rail type connecting portion 200 and the convex rail type connecting portion 3 are used.
00 are rail-fitted along the height direction h of the vehicle.
Can be easily connected even when is raised at different timings.

According to the first and second embodiments, the vertical link mechanism is employed in the lifting / lowering device constituted by the scissor link mechanism which is most likely to cause a large vertical swing, thereby reducing the vertical swing of the flat link mechanism. The effect when done is the greatest. Furthermore, according to the first and second embodiments, since the aerial work platform 150 and the elevator 160 are connected,
Since it is possible to take measures against the pitching of the elevating device where the person actually works, it is most effective from the viewpoint of safety.

Further, as a modification of the first and second embodiments, the adjacent work platform 150 and the elevator 16
Height detection means for detecting that became the height h ₁ connectable to 0 (for example, infrared sensors) may be provided to the aerial work platform 150 or the elevator 160. In this case, even when the adjacent work platform 150 and elevator 160 are raised at different timings, it is possible to realize connection at an accurate height position.

The flat link mechanism is not limited to the scissor link mechanism, but can be a high work platform by connecting a plurality of link bars rotatably along the link surface.
What is necessary is just to be able to ascend and descend while maintaining the parallel state of the elevator or the container.

FIGS. 8A and 8B are schematic views showing other embodiments of the planar link mechanism. FIG.
In FIG. 2, an actuator for expanding and contracting the planar link mechanism is omitted for simplicity.
4 to hydraulic cylinders 170 and 180 shown in FIG.

The planar link mechanism 400 shown in FIG.
One of the links is a crank-type linkage which is connected rotatably by a pin P ₂₀ the ends facing each other of the bars 410, 420. The crank type link mechanism 400 is configured such that the end of the link bar 410 is connected to the work table 150 or the elevator 1
60 or the container the end of the link bar 420 as well as rotatably connected by a pin P ₂₁ is rotatably connected by a pin P ₂₂ with respect to chassis 121 relative to the two link bars 41
By rotating a pin P ₂₀ to P ₂₂ around the 0,420, it is intended to expand and contract in the vehicle height direction h along the plane parallel to a plane of FIG. 8 (fourth link surface). It should be noted that the number of link bars of the crank type link mechanism 400 is not limited to two, and two or more link bars may be rotatably connected at ends facing each other.

The flat link mechanism 500 shown in FIG.
This is an antenna-type link mechanism including telescopic support members 510 and 520 having two link bars 511 and 512 (521 and 522) slidably. The antenna type link mechanism 500 connects the ends of the link bars 511 and 521 to the work table 150 or the elevator 160, respectively, and connects the ends of the link bars 512 and 522 to the chassis 12 respectively.
1 and the two telescopic support members 510 and 520 are expanded and contracted in synchronization with each other to expand and contract in the vehicle height direction h along one plane (fifth link surface) parallel to the plane of FIG. It is. The telescopic support members 510, 520
Are not limited to two, and two or more link bars may be slidably connected.

The foregoing merely illustrates preferred embodiments of the present invention, and those skilled in the art will be able to make various modifications within the scope of the appended claims. For example, one of the high work table 150 and the elevator 160 can be replaced with a transport container such as a container, and the platform 121 may be provided with three or more lifting devices.
Further, the elevating device is not limited to the one in which the two planar link mechanisms are arranged side by side as in the present embodiment, but may be one having one planar link mechanism or one having two or more planar link mechanisms. Good.

Further, the aerial work vehicle 100 is of a type having an elevating device on a chassis extending integrally from the front of the driver's seat, or a trailer arranged behind a tractor and having an elevating device on the chassis of the trailer. It may be a type.

[0050]

According to a first aspect of the present invention, there is provided an elevator in which adjacent elevating devices are orthogonally arranged on a chassis and supported by these elevating devices.
By connecting the workbench or the transport container, the vertical swing of one lifting device can be suppressed by the lateral rigidity of the other lifting device. Therefore, according to the first invention, the vertical swing of the lifting device is reduced, and the work such as repair and inspection at a high place and the transport of the load can be performed in a stable state.

According to a second aspect of the present invention, in the first aspect, the connecting means raises an adjacent elevator, workbench, or transport container at different timings from a rail fitting along the height direction of the vehicle. Even in the case of being connected, it can be easily connected.

According to the third invention, in the first invention or the second invention, a height detecting means for detecting that the height of the elevator, the workbench or the transport container can be connected is provided. Even when an adjacent elevator, workbench or transport container is raised at a different timing, connection at an accurate height position can be realized.

According to the fourth invention, the first to third inventions are described.
In any one of the inventions, a scissor-like link mechanism, which is most likely to cause a large pitching among the linking mechanisms, is employed, so that the effect of reducing the pitching of the linking mechanism can be maximized.

According to the fifth invention, the first to fourth inventions are described.
In any one of the inventions, since the aerial work vehicle is a tandem aerial work vehicle including an elevating device that supports an elevator and an elevating device that supports a work table, a part where a person actually works is used. This is the most effective from the viewpoint of safety because it is possible to take measures against pitching of the lifting device.

[Brief description of the drawings]

FIG. 1 is a top view of a first embodiment of an aerial work vehicle having a rocking structure according to the present invention, as viewed from above.

FIG. 2 is a side view showing FIG. ₁ from a direction D1.

The [3] Figure 1 is a rear view showing the D ₂ direction.

The [4] FIG. 1 is a front view showing the D ₃ direction.

FIGS. 5A and 5B are perspective views showing a state in which connection of a concave rail type connection portion as a first embodiment of a connection means for connecting an aerial work platform and an elevator has been completed, and connection thereof; It is a perspective view which shows the state which canceled.

FIGS. 6 (a) and (b) are FIGS. 5 (a) and 5 (b), respectively.
It is a side view of (b).

FIG. 7 is a perspective view showing a state in which a connection of a convex rail type connection portion which is a second embodiment of a connection means for connecting an aerial work platform and an elevator is released.

FIGS. 8A and 8B are schematic views showing another embodiment of the planar link mechanism.

[Explanation of symbols]

REFERENCE SIGNS LIST 100 work platform work 110 driver's seat 121 chassis 122 hydraulic jack 130 elevating device 130a scissor link (flat link) 131a-134a link bar 130b scissor link (flat link) 130b-134b link bar 140 elevating device 140a scissor link (flat link mechanism) ) 141a to 146a Link bar 140b Scissor link (flat link mechanism) 140b to 146b Link bar 150 Elevated work table 151a, 151b Slide floor 152 Opening door 160 Elevator 161 Elevating staircase 162 Opening door 200 Concave rail type connecting portion 210 Stop plate 211 Plate main body 211t Taper 212 Guide shaft 220 Concave rail 221 Rib 221t Taper 300 Convex rail type connecting part 310 Convex rail 311 Rail main body 31 t taper 312 guide shaft 320 concave plate 321 ribs 400 crank-type linkage 410, 420 link bar 500 antenna type link mechanism 510 telescoping support members 511, 512 link bar 520 telescoping support members 521 and 522 link bar P ₁ to P ₁₇ pin P ₂₀ ~P ₂₂ pin

Claims (5)

[Claims] 1. A vehicle comprising a plurality of elevating devices each comprising at least one planar link mechanism that expands and contracts in a plane from above a chassis, and each of these elevating devices includes an elevator,
An aerial work vehicle that supports at least one of a workbench and a transport container, wherein adjacent lifting devices are orthogonally arranged on the chassis, and a connecting means for connecting the elevator, the worktable or the transport container supported by the lift devices is provided. The anti-sway structure for aerial work vehicles. 2. The anti-swing structure for an aerial work vehicle according to claim 1, wherein the connecting means is a rail fitting along the height direction of the vehicle. 3. The anti-swing structure for an aerial work vehicle according to claim 1, further comprising height detecting means for detecting that the height has reached a level at which an adjacent elevator, work table or transport container can be connected. 4. The anti-swing structure for an aerial work vehicle according to claim 1, wherein the planar link mechanism is a scissor-like link mechanism. 5. The aerial work vehicle is a tandem aerial work vehicle including an elevating device that supports the elevator and an elevating device that supports the worktable. The anti-sway structure for aerial work vehicles as described in the item.