JPH0622716Y2 - Leveling equipment for aerial work vehicles - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is mounted on, for example, a boom tip of an aerial work vehicle,
Relating to improvement of manipulator or workbench leveling device, in particular, performing predetermined operation of workbench etc. even if workbench etc. is not in equilibrium by rotating balance valve installed on workbench etc. to arbitrary angle The present invention relates to a leveling device for an aerial work vehicle capable of performing the above.

[Prior art]

In order to efficiently carry out various construction work, including overhead line work for power transmission lines and communication lines, currently, aerial work vehicles equipped with a workbench, manipulator, etc. at the boom tip extending to a considerably high level have been developed. At the construction site, its function is in full effect.

[Problems to be solved by the device]

By the way, the conventional aerial work vehicle 1 shown in FIGS. 2 (a) and 2 (b).
Workbench 12 mounted at the tip of boom 11 at zero
In view of the fact that a lot of work at high places is performed in a balanced state, the work table 12 is equipped with a balance valve 13 (gravity sensing type), and the balance valve 1
With the output of 3, the balance actuator 14 arranged between the boom 11 and the workbench 12 is operated to operate the workbench 1
2 is configured to always be in equilibrium. In the figure, P is a hydraulic pump.

However, in the work table 12 having the above-described configuration, when equilibrium is required as the work posture, the work table 12 is always held in equilibrium, and thus work at a high place can be performed very efficiently. However, the workbench 12 equipped with the above-described balancing valve 13 does not obstruct an obstacle near the work site, for example, a street light 15 or dodges the street light 15 as shown by a virtual line in the figure. When approaching the power transmission line 16 or the like, which is the target work object, if the workbench 12 can be tilted, the street light 15
Without touching the workbench 12 to the
Although it is possible to efficiently perform a predetermined work at a high altitude without being aware of the above, in the workbench 12 having the above configuration, the balancing valve 13 is always parallel to the workbench 12 (see FIG.
(See), the workbench 12 cannot be tilted.

Therefore, it was not possible to tilt the workbench 12 as needed to avoid obstacles or approach a predetermined work object. Therefore, under such a situation, there are various problems such as that the stop position of the aerial work vehicle 10 has to be moved, and the work efficiency is reduced accordingly.

(Means for Solving the Object and Problem of the Invention) The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a manipulator or a manipulator mounted on the tip of a boom of an aerial work vehicle. Regarding work table leveling device improvement, especially work in high places where work can be performed at a predetermined height even when the work table or the like is tilted by rotating the balancing valve equipped on the work table or the like to an arbitrary angle. The purpose is to provide a leveling device for vehicles, and for that purpose, equip a workbench equipped with a gravity-sensing balancing valve on the boom tip, and use the output of the balancing valve to balance between the boom tip and the workbench. In an aerial work vehicle configured to actuate an actuator to maintain balance of a workbench, the balance valve is configured to be swingably mounted on the workbench in a vertical plane. To do.

[Action]

Since the above configuration is adopted, at a work site at high places where normal balancing work is required, the equilibrium state is maintained as in the conventional workbench to efficiently perform a predetermined work at high places. Even if there is an obstacle near the work site, it is possible to cancel the balance of the work table and tilt the work table at a certain angle, so that the obstacle can be avoided. It is possible to approach the work purpose. Therefore, it is possible to efficiently perform work in high places that cannot be performed when the workbench is held in a balanced state.

〔Example〕

An embodiment of the leveling device for an aerial work vehicle according to the present invention will be described in detail below with reference to FIGS. 1 (a) and 1 (b).

In the figure, 1 is an aerial work vehicle equipped with the leveling device according to the present invention, 2 is a turntable, 3 is a boom, 4 is a hoisting cylinder, 5 is an outrigger, 6 is a workbench, and 7 is a tip of the boom 3. A balance actuator disposed between the work table 6 and the work table 6 is a gravity-sensing balance valve.

By the way, the leveling device composed of the balance actuator 7 and the gravity sensing type balance valve 8 is shown in FIG.
As shown in (b), the work table 6 is connected to a hydraulic pump P mounted on the aerial work vehicle 1 so as to maintain the equilibrium of the work table 6, and in the present invention, the gravity sensing type balance valve is used. Further, an actuator 9 (actuation of this actuator 9 is performed by an operator M or the like) is attached to the side of 8 to enable the gravity sensing type balance valve 8 to rotate a predetermined angle in a vertical plane. Is configured.

Hereinafter, the operation of the leveling device for an aerial work vehicle according to the present invention will be described based on the above configuration.

That is, in the leveling device for an aerial work vehicle according to the present invention, the actuator 9 is arranged on the side surface of the balancing valve 8 mounted on the workbench 6, and the actuator 9 can be rotated by a predetermined angle in a vertical plane. I configured it so that
As shown by the phantom line in the figure, when the workbench 6 is tilted to avoid an obstacle near the workbench 6, for example, the street light L, or the target work object to avoid the street light L. In the case of approaching the power transmission line W, etc., the balance actuator 7 can be operated in a normal state, that is, in the same manner as when the workbench 6 is held horizontally. Therefore, it is possible to efficiently perform a predetermined work at a high place without bringing the workbench 6 into contact with the street light L and without being aware of the street light L during the work. Therefore, there is no need to move the aerial work vehicle 1 even in such a situation, and work efficiency is significantly improved.

[Effect of device]

As described in detail above, the present invention is equipped with a workbench equipped with a gravity sensing type balance valve at the boom tip, and a balance actuator arranged between the boom tip and the workbench by the output of the balance valve. In an aerial work vehicle configured to operate to maintain the balance of the workbench, since the balance valve is configured to be swingably mounted in the vertical plane on the workbench, normal balance work is required. In a high-altitude work site, the equilibrium state can be maintained as in the case of a conventional work table to perform a predetermined high-altitude work efficiently, and there are obstacles near the work site. Even in this case, the balance of the workbench can be released and the workbench can be tilted at a certain angle. Therefore, it is possible to avoid the obstacle and approach the work purpose.
Therefore, it has various excellent effects such as efficiently performing work in high places that cannot be performed when the workbench is held in a balanced state.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (a) is a perspective view showing an embodiment of an aerial work vehicle equipped with the leveling device according to the present invention, and FIG. 1 (b) is a schematic explanatory view of the leveling device. 2 (a) is a perspective view showing an example of an aerial work vehicle employing a conventional leveling device, and FIG. 2 (b) is a schematic explanatory view of the conventional leveling device. 1 ... Aerial work vehicle, 2 ... Turntable, 3 ... Boom, 4
... undulation cylinder, 5 ... outrigger, 6 ... workbench, 7 ... balance actuator, 8 ... balancing valve, 9 ... actuator, P ... hydraulic pump, L ... street light, M ... operator.

Claims (1)

[Scope of utility model registration request] 1. A workbench equipped with a gravity-sensing balance valve at the tip of a boom is provided, and a balance actuator disposed between the boom tip and the workbench is operated by the output of the balance valve so as to operate the workbench. An aerial work vehicle configured to maintain equilibrium, wherein the balancing valve is attached to a work table so as to be swingable in a vertical plane.