JPH0715691U - Aerial work vehicle - Google Patents

Abstract

(57) [Summary] [Purpose] The telescopic support mechanism of the work table has both boom type and lift type functions so that it can be used in both wide and narrow work sites. [Structure] A pedestal 2 that can be turned is provided on a traveling carriage 1.
In an aerial work vehicle in which the telescopic boom 4 is pivotally attached to the base 2 and the workbench 6 is attached to the tip of the telescopic boom 4, the base end of the telescopic boom 4 is attached to the base 2 at a point P deviated from the axis. A hoisting cylinder 7 is provided between the base 2 and the telescopic boom 4 by pivoting. In a wide field, the telescopic boom 4 is expanded and contracted and raised and lowered like a boom-type aerial work vehicle, and in a narrow field, the hoisting cylinder 7 is extended to vertically erect the telescopic boom 4 to expand and contract. The work table 6 is moved up and down to perform the work.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an aerial work vehicle that is used indoors or outdoors in construction such as telephone lines, road lighting, traffic lights, and construction.

[0002]

[Prior art]

 Generally, an aerial work vehicle used for telephone line construction or construction work is composed of a work table, a telescopic support mechanism for moving the work table up and down, and a traveling carriage. The aerial work vehicle is of a lift type having a scissors 20 shown in FIG. 2 and a post 21 shown in FIG. 3 as a telescopic support mechanism of a work platform, and a boom type having a telescopic boom 4 shown in FIG. It is roughly divided into two types, and the type is selected and used according to the construction content, work site situation, work position, etc.

[0003]

[Problems to be solved by the device]

 A work platform with a boom-type telescopic support mechanism has a wide working range, but the length of the telescopic boom for a given work height is large, and the stability of the machine is poor, and the loading capacity is too large to remove. However, since the entire length of the vehicle body in the running posture becomes large, it is not suitable for use in a narrow place even if it can be used in a large work site such as outdoor construction.

On the other hand, when the workbench support mechanism is of the lift type, the workbench can be vertically moved up and down, so that the stability of the machine is good, the loading capacity is large, and the running performance is high. Although the total length of the body in the posture is short, the work range is narrow and it is used only for work in limited areas such as indoor construction. Therefore, it is necessary to prepare both types of aerial work vehicles in order to handle various types of work.

The present invention solves such a problem in an aerial work vehicle, in which the telescopic support mechanism of the work table can be used as a boom-type aerial work vehicle in a wide work site, and The objective is to provide an aerial work vehicle that can raise and lower the workbench vertically, improve the stability of the machine body, increase the loading capacity, and can be used for narrow indoor construction.

[0006]

[Means for Solving the Problems]

 According to the present invention, in the aerial work vehicle in which a movable platform is provided on the traveling carriage, the telescopic boom is pivotally mounted on the platform, and the work platform is attached to the distal end of the telescopic boom, the base end of the telescopic boom is attached to the axis. The above-mentioned problem is solved by pivotally attaching to the mount at a pivot point deviated from the position and providing a hoisting cylinder between the mount and the telescopic boom.

[0007]

[Action]

 When used in a large work site, the extension boom is extended and retracted and raised and lowered like a normal boom-type aerial work vehicle. When used on a narrow work site, first retract the telescopic boom and extend the undulating cylinder to the specified length. The telescopic boom then stands upright because the base end is pivotally attached to the pedestal at a point that is offset from the axis. In this state, the telescopic boom is extended and the workbench is set to a predetermined height for work. Since the workbench moves up and down vertically, the stability of the machine is good and the loading capacity is also large.

[0008]

【Example】

 FIG. 1 is a side view showing the configuration of an aerial work vehicle that is an embodiment of the present invention. In this embodiment, the work vehicle for aerial work is provided with a pedestal 2 provided with a swing ring 3 on a traveling trolley 1, and a base end boom 5 of a telescopic boom 4 is pivotally attached to a pedestal 9 erected on the pedestal 2. A workbench 6 is attached to the tip boom 8 of the telescopic boom 4. A mounting bracket 13 is provided on the lower end of the base boom 5 so as to project laterally, and is pivoted to the support base 9 at a pivot point P that is displaced from the axis line 10 of the telescopic boom 4 by a predetermined distance Lo. It is worn. A hoisting cylinder 7 is provided between the gantry 2 and the retractable boom 4.

Further, a leveling cylinder 11 is mounted between the base end boom 5 and the support base 9, and a leveling cylinder 12 is mounted between the tip end boom 8 and the workbench 6, and the leveling cylinder 11 and the leveling cylinder 12 are hydraulically connected to each other. It is connected by a circuit (not shown) and constitutes a known leveling device. When the telescopic boom 4 is hoisted due to the extension and contraction of the hoisting cylinder 7, the workbench 6 is automatically kept horizontal. .

When this aerial work vehicle is used in a wide work site, the traveling carriage is caused to travel and stopped at a predetermined position, and the hoisting cylinder 7 is expanded and contracted similarly to a normal boom type aerial work vehicle. Then, the telescopic boom 4 is lifted up and down, the telescopic boom 4 is telescopically moved, and the workbench 6 is moved to the work place to perform work. When used on a narrow work site, the telescopic boom 4 is first contracted and the undulating cylinder 7 is extended for a predetermined length. Then, the telescopic boom 4 is vertically erected because the base boom 5 is pivotally attached to the support base 9 of the mount 2 at a pivot point P deviated from the axis 10. In this state, the telescopic boom 4 is extended and the workbench 6 is set to a predetermined height for work. Since the workbench 6 moves up and down vertically, the stability of the machine is good and continuous work can be performed at a slow speed, and the loading capacity is increased.

[0011]

[Effect of device]

 As described above, according to the present invention, it is possible to perform both conventional work of boom type and work of lift type on one aerial work vehicle. It is economical because there is no need to prepare an aerial work vehicle.

[Brief description of drawings]

FIG. 1 is a side view showing the configuration of an aerial work vehicle that is an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a conventional aerial work vehicle.

FIG. 3 is an explanatory diagram of a conventional aerial work vehicle.

FIG. 4 is an explanatory diagram of a conventional aerial work vehicle.

[Explanation of symbols]

 1 Traveling vehicle 2 Stand 3 Swivel ring 4 Telescopic boom 5 Base boom 6 Work platform 7 Lifting cylinder 8 Tip boom 9 Support platform 10 Axis

Claims (1)

[Scope of utility model registration request] 1. A base work of a telescopic boom in an aerial work vehicle in which a pedestal capable of turning is provided on a traveling trolley, a telescopic boom is pivotally attached to the gantry, and a work platform is attached to a tip end of the telescopic boom. Is pivotally attached to the mount at a pivot point deviated from the axis by a predetermined distance,
An aerial work vehicle characterized by having a hoisting cylinder provided between the gantry and the telescopic boom.