JPH0743120Y2 - Aerial work vehicle - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to an aerial work vehicle in which a telescopic boom is laid up and down immediately behind the driver's seat of a vehicle and a bucket is placed at the tip of the telescopic boom. Is.

(Prior Art) As shown in FIG. 7, this type of conventional work vehicle for aerial work has a swivel base 3 disposed immediately behind the driver's seat 2 of the vehicle 1 so that the swivel base 3 can swivel, and the swivel base 3 can expand and contract. Pivot the base end of the boom 4,
A hoisting cylinder 5 is arranged between the telescopic boom 4 and the swivel base 3 in an appropriate position so that the telescopic boom 4 can be hoisted. Swivel 4
An appropriate turning drive means is arranged between the vehicle 1 and the turntable 4, and the turning means can be turned by this driving means. In addition, the telescopic boom 4 includes the base boom 6 and the intermediate boom 7.
The front boom 8 is sequentially fitted into the intermediate boom 7, and an appropriate expansion / contraction drive means such as a hydraulic cylinder is arranged between the booms. At the tip of the telescopic boom 4 (the tip of the tip boom 8), a worker boarding bucket 9 is horizontally swingably attached to a vertical shaft 10 that always maintains a vertical posture regardless of the ups and downs of the telescopic boom 4. Further, between the bucket 9 and the vertical shaft 10, an appropriate horizontal turning drive means composed of a hydraulic motor, a speed reducer or the like is arranged so that the bucket 9 can be horizontally turned. An operation box 11 is arranged on the bucket 9, and this operation box 11 has a plurality of operation levers, and each operation lever is arranged corresponding to the drive means so that each drive means can be drive-controlled. . So bucket 9
An operator who boarded the vehicle operates the operation lever to appropriately perform the swinging motion of the swivel base 3, the ups and downs of the telescopic boom 4, and the horizontal swiveling motion of the bucket 9 to move the bucket 9 to a desired high position. It is located so that you can work in high places. In addition, in such an aerial work vehicle, as shown in FIG. 8, the bucket 9 is slanted rearward in a side view by contracting and retracting the telescopic boom 4. Is stored in the rear end portion of the vehicle 1 so as to be in a traveling state. Further, in such an aerial work vehicle, in order to stabilize the vehicle 1 when the bucket 9 is positioned at a high place, the outriggers 12 that extend laterally from the vehicle 1 and contact the ground are provided to the front, rear, left and right, respectively. It is arranged. Furthermore, on both sides of the vehicle 1 of such an aerial work vehicle, a tool box 13 for storing tools used during aerial work is arranged.

(Problems to be solved by the invention) However, such an aerial work vehicle has the following problems. That is, when the worker gets on and off the bucket 9 of the aerial work vehicle in a traveling state, since the bucket 9 is located at a high position, the worker once goes up and down on the vehicle 1 and gets on and off the bucket 9. This has been troublesome for the operator. In particular, when getting in and out of the bucket 9, the vehicle 1 has already been positioned by the outrigger 12 at a higher position than when traveling, and it has been troublesome to go up and down on the vehicle 1. Further, since the worker once moves up and down on the vehicle 1, it is necessary to secure a space on the vehicle 1 for the worker to move up and down.
It was designed to reduce the space for placing the tool box 13 placed above.

An object of the present invention is to provide an aerial work vehicle capable of directly getting on and off the bucket 9 from the ground when an operator gets on and off the bucket 9 without going up and down on the vehicle 1 in order to solve the above problems. To do.

(Means for Solving the Problem) An aerial work vehicle according to the present invention is an aerial work vehicle in which a telescopic boom is laid up and down immediately behind the driver's seat of the vehicle, and a bucket is placed at the tip of the telescopic boom. And the aerial boom is retracted and laid down to tilt the telescopic boom rearward in a side view, and the bucket is stored in the rear end of the vehicle to be in a traveling state. It is characterized in that it is provided with an operation section which is arranged at an appropriate place of the bucket or a vehicle in the vicinity of the bucket so as to be operable from the ground and which can control at least extension / contraction drive of the extension / contraction boom.

(Operation) In the aerial work vehicle of the present invention configured as described above, since the telescopic boom can be extended and driven by operating the operation portion from the ground, the bucket in the traveling state can be moved to near the ground, and Can be boarded directly from the ground. On the contrary, if the bucket is moved close to the ground and the operator descends to the ground, the bucket can be put into a traveling state by operating the operation section from the ground to drive the telescopic boom to contract. Therefore, when the worker gets on and off the bucket, he / she can get on / off the bucket directly from the ground.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. It should be noted that reference numerals 1 to 12 used in the following description are the same as those shown and described in the drawings in the related art, and therefore the same reference numerals are used and description thereof is omitted. 1 and 2 are explanatory views of an aerial work vehicle according to the present invention. FIG. 1 is a side view of the aerial work vehicle according to the present invention, and FIG. 2 is a side view of the aerial work vehicle according to the present invention. It is a top view of an aerial work vehicle. In FIGS. 1 and 2,
Reference numeral 14 denotes a control unit, which is arranged at the rear end of the vehicle 1 on the side opposite to the bucket 9 in the storage traveling state. The control unit 14 includes a switching valve (not shown) for hydraulically controlling various driving means arranged in an aerial work vehicle, and a control for controlling the switching valve based on signals from the operation box 11 and an operation section 15 described later. A part (not shown) and a safety device (not shown) for disabling operation to the dangerous side in a dangerous state are arranged. 15
Is an operation unit provided in the control unit 14, and is an operation lever for performing the above-mentioned overhanging grounding and retracting operation of the outrigger 12.
16 and 16 ..., and an operation lever for extending and retracting the telescopic boom 4.
17 and an operation amount detector 1 that is arranged corresponding to each operation lever and detects the operation amount of each operation lever and transmits it to the control unit.
It consists of 8, 18 ... The operating portion 15 is attached to the rear portion of the vehicle 1 so as to be operable from the rear portion of the vehicle 1, and is attached to a height position where it is operable from the ground. Reference numerals 16 and 17 denote tool boxes arranged on both sides of the vehicle 1, respectively, and the tool box 16 is arranged so that its entire length is longer than that of the tool box described in the related art.

The aerial work vehicle of the present invention thus constructed operates as follows. First, the case where an operator rides on the bucket 9 of an aerial work vehicle in a traveling state to perform aerial work will be described above. The operator operates the operation levers 16, 16 ... Of the operation unit 15 from the rear ground of the vehicle 1 to extend the outrigger 12 to the ground. After that, the operation lever 17 of the operation unit 15 is operated to extend the telescopic boom 4 and move the bucket 9 near the ground. (Indicated by the one-dot chain line in FIG. 1) Then, the operator directly enters the bucket 9 from the ground and operates the operation box.
By appropriately operating the operation lever 11 to move the bucket 9 to a desired work position at high altitude, work at high altitude is performed. On the contrary, when the bucket 9 is moved and stored from the work position at a high place to the storage traveling state, the reverse operation described above may be performed.
In this way, the worker can get on and off the bucket directly from the ground when getting on and off the bucket 9, and does not need to go up and down on the vehicle 1.

In the above embodiment, the operating portion 15 is replaced by the operating levers 16, 16
, 17 and manipulated variable detectors 18, 18 ..., However, the switching valve may be directly operated by each operating lever.

Further, in the operation portion 15 of the above-described embodiment, only the operation lever 17 for controlling the extension / contraction drive of the telescopic boom 4 when moving the bucket 9 is arranged. This is because the bucket 9 is positioned relatively upward when the bucket 9 is in the storage traveling state as shown in FIG. This is because it does not come into contact with the rear end portion of the vehicle 1, so that it is possible to move the bucket 9 near the ground by controlling the telescopic boom 4 to extend and retract. However, as shown in FIG. 3, when the bucket 9 is placed in the retracted traveling state and the bucket 9 is positioned relatively downward, the bottom surface of the bucket 9 and the vehicle 1 can be controlled only by controlling the telescopic boom 4 to extend and retract. The rear end of the rear end touches. Therefore, in this case, the telescopic boom 4 is attached to the operation unit 15.
In addition to the operation lever 17 that controls the telescopic drive, the telescopic boom 4
It is sufficient to dispose an operation lever for controlling the undulation drive or an operation lever for horizontally rotating the bucket 9. That is, in the former case, as shown in FIG. 4, the telescopic boom 4 is first raised (illustrated by a solid line in FIG. 4) and then the telescopic boom 4 is extended (illustrated by a dashed line in FIG. 4). ). Then, the telescopic boom 4 is laid down to move the bucket 9 near the ground (shown in FIG. 5). In this case, the bucket 9 can be moved closer to the ground by reducing the amount of protrusion of the bucket 9 behind the vehicle 1 as compared with the above embodiment. Next, in the latter case, as shown in FIG.
After turning the bucket horizontally and projecting the bucket 9 to the rear of the vehicle 1 (shown by a chain line in FIG. 2), the telescopic boom 4 is extended to move the bucket 9 near the ground (shown in FIG. 6). . In this case, when a part of the bottom surface of the bucket 9 comes into contact with the rear end portion of the vehicle 1 when the telescopic boom 4 is extended after the bucket 9 is horizontally turned, as shown in FIG. Cut off a part of the edge.

Further, although a manual operation lever is arranged in the operation unit 15 of the above-mentioned embodiment and the bucket 9 is moved to near the ground by a manual operation by the operator, the operation unit 15 can be automatically operated. You may arrange the switch to do. That is, the control order of each drive means for bringing the bucket 9 close to the ground or for putting it in the storage traveling state is stored in advance, and when the switch is operated, each drive means is driven based on the stored control order. It should be controlled. In this case, as compared with the case where the bucket 9 is moved to near the ground by operating a plurality of operation levers, the operator does not have to worry about the operation and erroneous operation can be prevented.

Further, instead of arranging the lowest operation lever necessary for moving the bucket 9 near the ground on the operation lever, the operation lever of each drive means is provided, and the bucket 9 is used by using an appropriate drive means according to the operator's judgment. Of course, it may be brought close to the ground.

Therefore, when the worker gets on and off the bucket 9 as in the case of the conventional technique, it is not necessary to once go up and down on the vehicle 1, and the worker can get on and off the bucket 9 directly from the ground. Therefore, when getting on and off the bucket 9, it is not necessary for the worker to once go up and down on the vehicle 1. That is, the operator can eliminate the space on the vehicle 1 in which he / she once moves up and down, and the entire length of the tool box 16 can be arranged long. Further, since the telescopic boom 4 is extended to the rear of the vehicle 1 without being driven to rotate, and the bucket 9 is moved to the vicinity of the ground behind the vehicle 1, the bucket 9 near the ground on the side of the vehicle 1 is provided. Compared with the one that moves, it has the following features. When installing the vehicle 1 on the work site, the rear of the vehicle 1 is the approach path of the vehicle 1 and there are relatively no obstacles on the work site. Even if the tool boxes 16 and 17 arranged on the left and right of the vehicle 1 are raised, the telescopic boom 4 does not fall down in this direction, which is an advantage that it does not become an obstacle.

Further, in the above-mentioned embodiment, the operation section 15 is arranged in the control unit 14, but it may be arranged in an appropriate place of the vehicle 1 or the bucket so as to be operable from the ground. Further, as a development example, a wireless or wired remote control device may be used.

(Effect of the Invention) Since the present invention is configured and operates as described above,
The operator operates the ground to move the bucket in the retracted running state to the vicinity of the ground so that he / she can get on and off the bucket directly from the ground, and does not have to go up and down once to the vehicle to get on and off the bucket.

[Brief description of drawings]

1 and 2 are explanatory views of an aerial work vehicle according to the present invention. FIG. 1 is a side view thereof, FIG. 2 is a plan view thereof, and FIGS. 7 and 8 are explanatory views of a conventional aerial work vehicle. 1: Vehicle, 2: Driver's seat, 4: Telescopic boom, 9: Bucket, 15: Control part

Claims (1)

[Scope of utility model registration request] 1. An aerial work vehicle in which a telescopic boom is laid up and down immediately behind a driver's seat of a vehicle, and a bucket is placed at the tip of the telescopic boom. In an aerial work vehicle in which the bucket is stored in the rear end portion of the vehicle in a traveling state in a state where the telescopic boom is laid down obliquely rearward, the bucket in the traveling state or a vehicle in the vicinity of the bucket is placed at an appropriate position from the ground. An aerial work vehicle, which is operably arranged and has at least an operation unit capable of controlling extension / contraction drive of the extension / contraction boom.