JPH0520794Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an aerial work vehicle having a bucket that is attached to the tip of a telescoping boom so as to be horizontally swingable.

(Prior Art) A conventional example of this type of aerial work vehicle will be explained based on FIGS. 4 to 6.

In Figures 4 and 5, aerial work vehicle A
The swivel base 2 is mounted on the vehicle 1 so as to be able to rotate freely.
The base end of the telescoping boom 3 is attached so that it can be driven up and down, and a posture maintaining member 4 is attached to the tip of the telescoping boom 3 to maintain a constant posture on the ground regardless of the ups and downs of the telescoping boom 3. 3
It is attached via a horizontal support shaft 5 that is perpendicular to the undulation trajectory plane. This posture maintaining member 4 includes:
The tip of a bracket 7 protruding outward on one side from a bucket 6 for boarding a worker is attached via a vertical shaft 8 so as to be horizontally pivotable. This vertical axis 8
is located directly above the horizontal support shaft 5. This type of aerial work vehicle is configured to travel by retracting the telescoping boom 3 and laying it down to the rear of the vehicle 1, and by rotating the bucket 6 to one side of the telescoping boom 3. Bucket 5 when moving
The telescopic boom 3 is rotated horizontally around the vertical axis 8.
By locating it on one side, the amount of protrusion of the bucket 6 toward the rear of the vehicle 1 during travel is reduced. In the case of the examples shown in FIGS. 4 and 5, the bracket 7 that protrudes outward from one side of the bucket bag 6 projects outward from approximately the center of the long side of the bucket bag 6, which is rectangular in plan view.

As shown in FIG. 6, a bracket 7 that protrudes outward from one side of the bucket bag 6 is provided at a position offset from the center on the long side of the bucket bag 6, which is rectangular in plan view. also exists as a conventional example.

(Problems with the Prior Art) However, in the conventional aerial work vehicle configured as described above, the vertical shaft 8 is located directly above the horizontal support shaft 5 provided at the tip of the telescopic boom 3. In the case shown in FIGS. 4 and 5, when the bucket tote 6 is horizontally rotated around the vertical axis 8 and positioned to one side of the telescopic boom 3, the bucket tote 6 is Approximately 1/2 of the long side
In an aerial work vehicle where the tip of the telescoping boom 3 protrudes to the rear of the vehicle by an amount of .

In addition, in the case of the structure shown in FIG. 6, when the bucket 6 is positioned on one side of the telescopic boom 3, the bucket 6 protrudes from the tip of the telescopic boom 3 toward the rear of the vehicle during traveling. Although the amount can be reduced, when the bucket cart 6 turns, the corners 6' and 6'' of the bucket cart 6 turn with different trajectories, so there is a risk of the corner 6'' colliding with a structure, etc. Therefore, there is a natural limit to reducing the amount of protrusion of the bucket 6 toward the rear of the vehicle from the tip of the telescopic boom 3 during travel by using only the means shown in FIG. 6.

The high-altitude working vehicle of the present invention is capable of rotating the bucket to one side of the telescopic boom 3 during traveling without increasing the difference in the turning locus of the two corners of the bucket 6 when the bucket tot 6 is turned. In other words, we would like to provide an aerial work vehicle that can reduce the amount of rearward protrusion of the vehicle, and that can be equipped with a longer telescopic boom than the aerial work vehicle whose overall length during travel is limited. That is.

(Means for solving the problem) The base end of the telescopic boom 3 is attached to the swivel base 2 mounted on the vehicle 1 so as to be movable up and down. A posture maintaining member 4 that always maintains a constant ground posture regardless of ups and downs is attached via a horizontal support shaft 5 perpendicular to the ups and downs trajectory plane of the telescopic boom 3,
The tip of a bracket 7 extending outward on one side of a bucket 6 for boarding a worker is connected to the posture maintaining member 4 via a vertical shaft 8, and the bucket 6 is connected to the vertical shaft 8.
An aerial work vehicle configured to be able to horizontally swing around a center, and in particular, in a running state, the telescopic boom is lowered to the rear of the vehicle and the bucket is rotated to one side of the telescopic boom to travel. In the above-mentioned aerial work vehicle, the vertical shaft is attached to the posture maintaining member eccentric toward the proximal end of the telescopic boom with respect to the horizontal support shaft, and the vertical shaft is located on the back surface of the telescopic boom in a traveling state. An aerial work vehicle characterized by being configured as follows.

(Function) By configuring as described above, the bucket 6 is mounted on the posture maintaining member 4 with an eccentric position closer to the base end of the telescopic boom than the horizontal support shaft 5 attached to the distal end of the telescopic boom 3, and the bucket 6 is mounted on the posture maintaining member 4 in a state where it is in a running state. Since it is designed to horizontally rotate around a vertical axis 8 configured to be located on the back of the telescopic boom,
When the bucket tote is turned to one side of the telescopic boom 3 in order to travel and move the aerial work vehicle, the amount of protrusion of the bucket tote 6 from the tip of the telescoping boom 3 can be reduced by an amount commensurate with the above-mentioned deviation amount, and as a result, The length of the telescopic boom 3 can be increased accordingly.

(Example) An example of the present invention will be described based on FIGS. 1 and 3. The present invention differs from the conventional aerial work vehicle shown in FIGS. 4 to 6 and described above in the arrangement position of the vertical shaft 8 on the posture maintenance member 4. The symbols used in the description of the technology and their explanations will be used as is in the following description.

In FIGS. 1 and 2, the vertical shaft 8 is mounted on the posture maintaining member 4 which is offset by l toward the base end of the telescopic boom 3 with respect to the horizontal support shaft 5,
The vertical shaft 8 is configured to be located on the back surface of the telescopic boom 3 in a running state. The amount of extension of the bracket 7 extending outward from one side of the bucket cart 6 is sufficient to allow the bucket cart 7 to horizontally swing via the front surface of the tip end of the telescopic boom 3.

Next, the action will be explained. Comparing the state shown in FIG. 1 in which the telescopic boom 3 is laid down and the bucket 6 is turned to one side of the telescopic boom 3 with the same state in the prior art shown in FIG.
It is easy to understand that the amount of protrusion in the distal direction is reduced by the offset amount l of the vertical shaft 8 with respect to the horizontal support shaft 5.

(Example of development of the present invention) Next, an example of development of the aerial work vehicle of the present invention will be described.

The present invention is similar to the conventional example shown in FIG. 6, that is, the bracket 7 is protruded outward from the long side of the bucket cart 6, which is rectangular in plan view, at a position offset from the center, and the bracket 7 is moved outwardly. Of course, it may also be used in conjunction with a technique for reducing the amount of protrusion of the bucket 6 from the tip of the telescopic boom 3 during movement. In this case, the amount of deviation of the bracket 7 from the center of the long side of the bucket 6 can be reduced by an amount corresponding to the amount of deviation of the vertical shaft 8 toward the base end of the telescopic boom 3 with respect to the horizontal support shaft 5. Therefore, the difference in the turning trajectories of the corner portions 6' and 6'' of the bucket cart 6 can be reduced.

In addition, the present invention has a vertical axis 8 as shown in FIG.
may be arranged on the posture maintaining member 4 at a position closer to the base end of the telescopic boom 3 and on the other side of the telescopic boom 3 with respect to the horizontal support shaft 5. In this case, by horizontally turning the bucket tote 6 to one side of the telescopic boom 3 during traveling, the bucket tote 6 can be stored close to one side of the telescopic boom.

(Effects) The aerial work vehicle of the present invention, configured and operated as described above, has an extremely simple configuration, but when traveling, the amount of protrusion of the bucket 6 toward the tip of the telescopic boom 3 can be reduced when the bucket 6 turns. This makes it possible to reduce the difference in the swing trajectories of the two corners 6' and 6'' of the bucket 6 without increasing it, so it is possible to equip a longer telescopic boom with an aerial work vehicle whose overall length during travel is limited. This has the effect that it is possible to

[Brief explanation of drawings]

Figure 1 is a side view of the aerial work vehicle according to the present invention, Figure 2 is a plan view of the bucket part in Figure 1, Figure 3 is a plan view of the bucket part in another embodiment of the present invention, and Figure 4 is a plan view of the bucket part in another embodiment of the present invention. Figures 6 to 6 are explanatory diagrams of conventional aerial work vehicles. Vehicle...1, Swivel platform...2, Telescopic boom...
3. Posture maintenance member...4, Horizontal support shaft...5, Bucket...6, Bracket...7, Vertical shaft...8.

Claims (1)

[Scope of Claim for Utility Model Registration] The base end of a telescoping boom is attached to a swivel base mounted on a vehicle so as to be movable up and down, and the tip end of the telescoping boom is attached to a swivel platform mounted on a vehicle so as to be movable up and down, regardless of the up and down movement of the telescoping boom. A posture maintaining member that always maintains a constant ground posture is attached via a horizontal support shaft perpendicular to the undulation trajectory plane of the telescopic boom, and the tip of the bracket that extends outward from one side of the bucket for the worker to board is attached. An aerial work vehicle, which is connected to the posture maintaining member via a vertical axis so that the bucket can be horizontally rotated about the vertical axis via the front end of the telescopic boom; In an aerial work vehicle configured to move by lowering the boom to the rear of the vehicle and rotating the bucket to one side of the telescoping boom, the vertical shaft is positioned closer to the proximal end of the telescoping boom than the horizontal support shaft. An aerial work vehicle, characterized in that the vehicle is mounted on the posture maintaining member eccentric in the direction, and is configured such that the vertical axis is positioned on the back surface of the telescopic boom in the traveling state.