JP2567983Y2 - Vertical lifting aerial work vehicle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical lifting type aerial work vehicle having a vertically movable work table on a vehicle body and a deck portion of the work table which is freely expandable in the lateral direction of the vehicle body. .

[0002]

2. Description of the Related Art A scissors-type or vertical post-type lifting device is mounted on a vehicle body that can travel with crawlers (crawler tracks), wheels, and the like on its left and right sides. BACKGROUND ART An aerial work vehicle in which a workbench on which an operator rides is vertically moved vertically has been known.
If such an aerial work vehicle is used, the worker who is on the work table can be moved to a predetermined height, so that the worker can easily work at a height. In such a conventional aerial work vehicle, the floor area of the workbench does not increase, and the vehicle body travels when performing work in a wider range.

However, the operation of moving the vehicle body with the work table raised and lowered is cumbersome, and the applicant has slid the sub-deck part left and right with respect to the main deck part (base part) of the work table. Then, the sub-deck was made to protrude from side to side to increase the floor area of the workbench.
With this configuration, the work range that can be performed without moving the vehicle body is expanded in the lateral direction, the frequency of the traveling movement of the vehicle body is reduced, and the work efficiency can be improved.

[0004]

However, if the deck of the worktable is slid left and right to protrude, the center of gravity of this portion moves to the side, and the stability of the vehicle body is reduced accordingly. Problems arise. In addition, such a vertical lifting type aerial work vehicle is generally used for indoor wiring work, interior work and the like, and is often a small vehicle, the support of the vehicle body is a traveling means of the vehicle left and right, That is, it is performed by the left and right crawlers or wheels.

The present invention has been made in view of such a problem.
It is an object of the present invention to provide a vertical ascending and descending aerial work vehicle configured to ensure sufficient vehicle stability even when the workbench deck is slid left and right.

[0006]

In order to achieve the above object, according to the present invention, a deck of a worktable mounted on a vehicle body so as to be able to move up and down is expandable to at least one of the right and left sides, and the traveling means for the left and right sides of the vehicle body is provided. The aerial work vehicle is configured so that at least the traveling means on the same side as the direction of extension of the deck portion can be extended in the same direction as the direction of extension of the deck portion, and the deck portion is extended by the deck extension actuator. The traveling means is extended by a traveling means extension actuator. The traveling means further includes a traveling means extension detector for detecting extension of the traveling means and an actuator operation control means for controlling the operation of the deck extension actuator based on the detection by the detector. Unless the expansion is detected, the actuator operation control means does not allow the deck expansion actuator to expand the deck portion.

[0007]

When the vertical lifting type aerial work vehicle having the above structure is used, the deck expansion actuator does not operate even if the deck of the workbench is expanded when the traveling means is not expanded, and the deck is expanded. I can't let it.
In other words, the deck cannot be expanded unless the traveling means is expanded, and the stability of the vehicle body is maintained.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a vertical lifting type aerial work vehicle 10 according to the present invention. Crawler-type traveling means 2, 3 are provided on the left and right sides of the body 11 of the aerial work vehicle 10, and the crawler-type traveling means 2, 3 are driven to drive the vehicle. The left and right crawler type traveling means 2 and 3 are respectively driven sprockets 2a and 3
a, idler wheels 2b, 3b and crawlers 2c, 3c wound around these, and drive sprockets 2a, 3a
Is driven by a built-in motor (not shown) to drive the crawler 2
c, 3c to drive the vehicle body 11 back and forth.

The right-hand crawler type traveling means 2 is shown in FIG.
As shown by the dashed line, the vehicle is configured to be able to protrude to the right, and a traveling device including a hydraulic cylinder that allows the right crawler-type traveling device 2 to be protruded or retracted to the right in the vehicle body 11. Extended actuator (not shown)
Is built-in. Therefore, the right crawler traveling unit 2 can be protruded to the right or retracted by the traveling unit extension actuator. Similarly, as shown in FIG. 2, the left crawler type traveling means 2 can protrude to the left, and can be protruded or retracted to the left by a traveling means expansion actuator (not shown) built in the vehicle body 11. You can do it.

On the other hand, a pair of scissor links (a right scissor link 12a and a left scissor link 12b) disposed parallel to each other are attached to the upper right and left sides of the vehicle body 11. The scissor links 12a and 12b are connected to each other, and constitute a scissors-type telescopic link device 12 that operates to expand and contract vertically. At the upper end of the scissors-type telescopic link device 12, a worktable 1
3 is attached. The work table 13 is for an operator to board and has handrails 13c and 13d for safety. On the front handrail 13d, an operation device 15 operated by an operator who is on the work table 13 is provided. For this reason, after the operator gets on the worktable 13,
The traveling control of the vehicle body 11 and the scissors-type telescopic link device 12
By performing the expansion / contraction control, the operator can be moved to an arbitrary high place.

In the aerial work vehicle 10, the work table 1
The third deck is composed of a main deck 13a attached to the tip of the scissors-type telescopic link device 12, and left and right sub-decks 13b built in the main deck 13a and capable of protruding sideways as shown by a two-dot chain line. I have. The extension and retraction of the sub-deck 13b is performed by a deck expansion actuator composed of a hydraulic cylinder built in the main deck 13a. Accordingly, if the sub-deck 13b is protruded to the side, the deck floor area of the work table 13 can be expanded to the side, and the work range of the worker who boarded the work table 13 can be expanded, and the work can be performed. It can be performed efficiently.

However, when the sub-deck 13b is protruded to the side as described above, a worker or the like is also located on the sub-deck 13b, so that the overturning moment acting on the vehicle body 11 is large. And the stability of the vehicle body 11 may be reduced. For this reason, in the aerial work vehicle 10, the expansion of the sub-deck 13b cannot be performed unless the right and left crawler type traveling means 2, 3 are expanded. Also, the stability of the vehicle body 11 is ensured.

FIG. 3 shows an operation control system of the vertical lifting type aerial work vehicle 10, and this operation will be described with reference to FIG. This operation control is performed by a worker who is on the work table 13 operating the operation device 15. Operation device 15
Is input to the controller 20, and based on the operation signal, the controller 20
Controls the driving of the crawlers 2c and 3c to control the running of the vehicle, controls the operation of the deck expansion actuator 21 to control the expansion of the sub-deck 13b, and controls the operation of the running means expansion actuator 22. For example, extended control of the traveling means 2 and 3 is performed.

For this reason, when the operation lever 15 is operated by the operation device 15, the operation of the traveling drive motor 25 is controlled based on the operation, and the traveling of the vehicle is controlled. On the other hand, when the operation of the traveling means extending actuator 22 is controlled by the operating device 15 to extend the right traveling means 2, for example, as shown in FIG.
The right side of the vehicle body is lifted by the right side lifting actuator 5 of the lifting actuators 5 and 6 composed of hydraulic cylinders disposed downward in the inside of the vehicle.
Then, the raised traveling means 2 on the right side is extended by the traveling means extending actuator 22. Thereby, the traveling means can be smoothly expanded without applying a thrust force to the crawler. As shown in FIG. 2, an extension detector 16 for detecting the extension of the left and right traveling means 2 and 3 is attached to the vehicle body 11, and when the traveling means 2 and 3 are extended in this way, the extension is extended. Detected by the detector 16 and the detection signal is transmitted to the controller 20.
Is output to

Next, a case will be described in which the operating device 15 is operated to cause the deck expansion actuator 21 to expand the sub-deck 13b. When the operating device 15 is operated so as to extend the sub-deck 13b, this operation signal is input to the controller 20.
Indicates whether the extension detector 16 has detected that the traveling means 2 and 3 have been extended in the same direction as the extension direction of the sub deck 13b (that is, whether or not this detection signal has been input). Is checked, and only when the traveling means 2 and 3 are extended, the deck extension actuator 21
Is operated to expand the sub deck 13b. Thus, the auxiliary deck 13b can be expanded only when the traveling means 2 and 3 are expanded and stability can be ensured.

In the above configuration, the auxiliary deck can be extended only to the side where the traveling means is extended (that is, only the right auxiliary deck can be extended when the right traveling means is extended). However, the sub-deck may not be extended unless the traveling means is extended to the left and right sides. Further, in the above-described example, the aerial work vehicle having crawler type traveling means provided on the left and right sides of the vehicle body has been described. Further, the example in which the scissors-type telescopic link is used as a device for raising and lowering the work table has been described, but a vertical post-type lifting device may be used instead.

[0017]

[Effects of the Invention] As described above, according to the present invention,
The deck portion of the worktable that is mounted on the vehicle so as to be able to move up and down is freely expandable to at least one of the left and right sides. The aerial work vehicle is configured to be freely expandable in the direction, and the actuator operation control means does not perform the expansion of the deck portion by the deck expansion actuator unless the expansion of the running means is detected by the expansion means of the running means. As a result, the deck cannot be expanded until the running means is expanded, and the stability of the vehicle body can always be ensured. For this reason, when the deck portion is expanded, the traveling means for supporting the worktable is also always expanded, and the vehicle body stability can be always maintained regardless of the expansion of the deck portion.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a vertical lifting type aerial work vehicle according to the present invention.

FIG. 2 is a front view of the vertical lifting aerial work vehicle.

FIG. 3 is a block diagram showing an operation control system of the vertical lifting aerial work vehicle.

FIG. 4 is a front view of the vertical lifting aerial work vehicle.

[Explanation of symbols]

 2,3 Crawler type traveling means 5,6 Lifting actuator 11 Body 12 Scissors type telescopic link device 13 Work table 13a Main deck 13b Secondary deck 15 Operating device 21 Deck extension actuator 22 Traveling means extension actuator

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B66F 11/04 B66F 11/04

Claims (1)

(57) [Scope of request for utility model registration] 1. A vehicle having running means on the left and right sides of a vehicle body and a worktable vertically movable up and down on the vehicle body, wherein a deck portion of the worktable is freely expandable to at least one of the left and right sides. A vertical ascent / descent type aerial work vehicle in which traveling means on the same side as the direction of extension of the deck portion is freely extendable in the same direction as the direction of extension of the deck portion; a deck extension actuator for extending the deck portion; A traveling means extension actuator for extending the means, a traveling means extension detector for detecting whether or not the traveling means is extended by the traveling means extension actuator, and the traveling means being extended by the traveling means extension detector. An actuator operation control that restricts the expansion operation of the deck unit by the deck expansion actuator unless a Vertical elevating aerial platforms, characterized in that it comprises a means.