JP2579398Y2 - 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 an aerial work vehicle having a boom having a work table at a tip thereof, which is freely rotatable, undulated, etc., on a self-propelled body.

[0002]

2. Description of the Related Art Such an aerial work vehicle is disclosed, for example, in Japanese Utility Model Laid-Open No. 3-62098, and has been widely used. This aerial work vehicle is configured such that a boom is mounted on a swivel provided on the vehicle body so that the boom can be raised and contracted, and a work platform on which a worker rides is mounted at the end of the boom. It is folded down at a position extending forward of the vehicle body, and the boom tip and the work table are stored and held so as to be positioned above the driving cabin. It should be noted that, in a state where the vehicle is stored in this manner, an operator gets on the driving cabin and runs the vehicle.

[0003] Conventional aerial work vehicles are often manufactured using the body of a truck, and a driving cabin is provided at the front of the body, and a swivel is provided on a frame at the rear of the body. . For this reason, in the state where the boom and the workbench are stored as described above, the tip of the boom and the workbench attached thereto are located above the driving cabin, and the height of the aerial work vehicle is increased, In some cases, the height limitation during traveling movement becomes a problem, and the traveling stability becomes a problem. From such a fact, the applicant has arranged the cabin for the driving vehicle close to the left or right side of the vehicle body,
We have devised an aerial work vehicle having a configuration in which the boom and the work table can be placed sideways of the cabin and stored in an upright position.

[0004]

In the conventional aerial work vehicle, the engine is disposed below and behind the driving cabin at the front of the vehicle body. However, in the case of such an aerial work vehicle, since the driving cabin is biased to the left or right, it is difficult to dispose the engine below the driving cabin, and the disposition position of the engine tends to be a problem. . In particular, it is necessary to support the engine with a supporting structure having a structure capable of supporting the weight of the engine and suppressing vibration and noise, and the boom and the workbench when the engine is in a retracted state. It is necessary to dispose them so as not to interfere with each other, and the support structure of the engine and its disposition position tend to be a serious problem.

The present invention has been made in view of such a problem.
In an aerial work vehicle having a configuration in which the boom and the worktable can be stored sideways on the side of this cabin as described above, the engine can be supported firmly while suppressing vibration and noise, and can be stored in the stored state. It is an object of the present invention to provide an aerial work vehicle having a configuration that does not cause interference between the boom and the workbench and the engine.

[0006]

In order to achieve the above object, the aerial work vehicle according to the present invention is provided on a self-propelled vehicle body.
Arrange the engine, the cabin for the driver, and the swivel,
A work table is pivotally mounted on the end of a boom pivotally supported on the swivel base so that the work table can be swiveled in a horizontal plane. Thus, the boom is configured to be stored on the vehicle body. The frame that constitutes the vehicle body covers the upper part of the engine, and the swivel is mounted on a portion of the frame that covers the upper part of the engine.

[0007]

In the case of the aerial work vehicle having the above construction, the workbench and the boom can be located beside the cabin and can be stored therein, so that the overall height of the aerial work vehicle in the stored state can be reduced. be able to. Further, the boom can be extended and stored in the front and rear of the vehicle body so that the full length of the vehicle body can be stored and used, so that the boom length can be increased. In addition, the engine can be supported by the frame while being covered by the frame,
The engine can be firmly supported while preventing noise from being transmitted to the outside. In addition, since the swivel is mounted on the frame above the engine, a storage space for the boom and the swivel can be secured without being disturbed by the engine.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. First, FIGS. 1 to 4 show an aerial work vehicle according to an embodiment of the present invention. In these figures, an arrow F indicates the front of the vehicle body, and an arrow R indicates the rear of the vehicle body. The aerial work vehicle includes a vehicle body 1 having a pair of left and right front wheels 2 and a rear wheel 3 and capable of traveling. A driving cabin 5 is disposed on the right side of the front part (arrow F side) of the vehicle body 1,
A tool box 6a is provided at the rear side of the operation cabin 5 so as to extend forward and backward. A tool box 6b is also provided on the left rear side of the vehicle body 1 so as to extend back and forth. An engine (power unit) 4 serving as a power supply source is disposed at the rear center of the vehicle body 1. Outriggers 7 are provided at four front, rear, left and right sides of the vehicle body 1 so as to be deployable to the left and right, and project downward to support the vehicle body 1 during work.

On the other hand, the engine 4
The swivel 11 is attached to the upper side of the table.
The swivel base 11 can be swiveled by a built-in swivel motor (not shown), and a boom 12 is pivotally supported by the swivel base 11 by a pin 11a and can be raised and lowered. The boom 12 is telescopically combined with a plurality of boom members so as to be extendable and contractible, and is operated by a built-in telescopic cylinder (not shown). Further, an up-and-down cylinder 13 is provided between the swivel base 11 and the boom 12, and the boom 12 is moved up and down by the expansion and contraction of the up-and-down cylinder 13.

A vertical post 14 is pivotally supported on the tip 12a of the boom 12. The vertical post 14 is always held vertically by a leveling mechanism (not shown) regardless of the up-and-down movement of the boom 12. An arm 15 is attached to the vertical post 14 so as to be able to pivot horizontally, and a worktable 16 is attached to the tip of the arm 15 so as to be pivotable horizontally. A winch mechanism 17 is attached to the upper end of the vertical post 14. The workbench is provided with an upper operation device 18 for performing operation control of the boom 12, turning control of the arm 15, turning control of the worktable 16, and the like at the time of working at a high place. A device 19 is provided on the swivel base 11.

FIG. 5 shows the structure of a frame assembly 30 constituting the vehicle body 1 of such an aerial work vehicle. The frame assembly 30 includes a frame body 31 extending in the front-rear direction of the vehicle body, outrigger beams 32 and 33 attached to four front, rear, right and left portions of the frame body 31, and a support frame 35 formed at the rear of the frame body 31. Is done. Outrigger cylinders 7a are attached to the ends of the outrigger beams 32 and 33 so as to extend vertically.
Further, the support frame 35 has a box-shaped engine holding space 38 having an open rear end surface.
1 is formed with a mounting opening 36.

The engine holding space 38 of the support frame 35
Inside, the engine 4 is mounted as shown in FIG. For this reason, the engine 4 is directly supported by the support frame 35, and is firmly supported by the support frame 35 to suppress vibration. Further, since the engine holding space 38 is box-shaped and is surrounded by the surroundings, the sound from the engine 4 inserted in the space 38 is cut off by the support frame 35, and external noise is suppressed.

The swivel 11 is mounted on the support frame 35. Here, a swivel joint 1 for connecting a hydraulic oil passage between the vehicle body side and the boom side is provided on a lower surface of the swivel base 11.
As shown in FIG. 6, the swivel joint 11a is attached to the mounting opening 36a.
And into the engine holding space 38 so that the turntable 1
1 is mounted on the support frame 35. As described above, the engine 4 and the swivel base 11 are attached to the frame assembly 30 to assemble the aerial work vehicle.

FIG. 1 to FIG. 4 show a state in which the boom 12 and the work table 16 are stored in the storage positions in the aerial work vehicle having such a configuration. As can be seen from the drawing, in the retracted state, the boom 12 is laid down on the vehicle body 1 while extending forward in the center of the vehicle body 1, and its tip is located close to the left side of the driving cabin 5. . The work table 16
The arm 15 and the worktable 16 are pivoted to be positioned along the left side surface of the boom 12, and are placed on the left side of the vehicle body 1 in this state. At this time, since the engine 4 is disposed below the swivel base 11, the engine 4
However, it does not hinder the storage of the boom 15 and the worktable 16.

When stored in this manner, the workbench 16 is not positioned above the driving cabin 5 as in the related art, so that the overall height of the aerial work vehicle can be reduced. Thereby, the problem of running height limitation during running is less likely to occur, and running stability is improved. Also, boom 1
2 extends from the rear part of the vehicle body 1 to the front end and is stored,
The full length of the front and back of the vehicle body 1 can be stored,
The length of the boom 12 can be increased.

In this state, the wheels 2 and 3 are driven by the engine 4 and the aerial work vehicle travels. At this time, a worker (driver) gets into the driving cabin 5 and drives the vehicle. In this case, the aerial work vehicle may be configured so that the engine 4 drives one of the front wheels 2 and the rear wheels 3 to travel, but both the front wheels 2 and the rear wheels 3 are driven (four wheels). Driving), the traveling performance is improved. Further, the front wheels 2 are generally steered, but in order to improve the mobility at the work site, the rear wheels 3 can be steered (four-wheel steering configuration) as necessary. Is preferred.

When the vehicle arrives at the work site, the outrigger 7 is first extended to support the vehicle body 1. Next, the operator gets on the work table 16 and operates the upper operation device 18 to perform the turning operation of the turning table 11, the raising and lowering and extending and retracting operation of the boom 12, the turning operation of the arm 15, the turning operation of the work table 16, and the like. The work is controlled and the worker is moved to a predetermined height together with the work table 16 to perform work at a high place.

[0018]

[Effects of the Invention] As described above, according to the present invention,
The boom is configured to be stored on the vehicle body so that the boom is folded down on the vehicle body and the boom and the work table do not overlap with the cabin in plan view. The height of the aerial work vehicle in the retracted state can be lowered, and the boom can be extended and retracted to the front and rear of the vehicle body to store the vehicle fully utilizing the front and rear length of the vehicle. , The boom length can be lengthened.

Further, in the aerial work vehicle of the present invention, since the swivel is mounted on a portion of the frame constituting the vehicle body that covers the upper part of the engine, the engine is supported by the frame while being covered by the frame. It is possible,
The frame can firmly support the engine while preventing vibration and noise from being transmitted to the outside. In addition, since the swivel base is mounted on the frame above the engine, a storage space for the boom and the swivel base can be secured without being disturbed by the engine.

[Brief description of the drawings]

FIG. 1 is a perspective view of an aerial work vehicle according to the present invention as viewed obliquely from the front.

FIG. 2 is a perspective view of the aerial work vehicle as viewed obliquely from behind.

FIG. 3 is a plan view of the aerial work vehicle.

FIG. 4 is a side view of the aerial work vehicle.

FIG. 5 is a perspective view showing a frame assembly constituting a vehicle body of the aerial work vehicle.

FIG. 6 is a partial sectional perspective view showing a state where an engine is attached to the frame assembly.

[Description of Signs] 1 Body 2, 3 Wheels 4 Engine 5 Operating Cabin 7 Outrigger 11 Swivel Table 12 Boom 15 Arm 16 Work Table 30 Frame Assembly 31 Frame Body 35 Support Frame

Claims (1)

(57) [Scope of request for utility model registration] 1. A self-propelled vehicle body having driving wheels, an engine disposed on the vehicle body, a cabin for a driver disposed on the vehicle body, and a turn disposed on the vehicle body A table, a boom pivotally supported on the swivel base so as to be able to move up and down, and a work table which is pivotally mounted on a tip of the boom in a horizontal plane, and the boom is laid down on the vehicle body,
And an aerial work vehicle configured such that the boom and the working table do not overlap with the cabin in a plan view, and the boom is stored on the vehicle body, wherein the frame of the vehicle body is located above the engine. Wherein the swivel is mounted on a portion of the frame that covers an upper portion of the engine.