JPH0626544Y2 - Plumbing equipment for aerial work vehicles - Google Patents

Description

[Detailed Description of the Invention] (1) Field of Industrial Application The present invention relates to an aerial work vehicle in which a workbench is swingably attached to the tip of a boom to keep the workbench in balance. The present invention relates to a piping system for a work vehicle.

(2) Conventional Technology An aerial work vehicle, in which a workbench is equilibrated at the tip of the boom and piping for sending fluid such as water or air from the base end of the boom to the workbench is provided along the boom, is, for example, Jpn. It is conventionally known as described in JP-A-7919.

(3) Problems to be Solved by the Invention However, in the conventional piping device for an aerial work vehicle, the pipe mounted along the boom and the pipe mounted on the workbench are connected via a flexible hose. Therefore, depending on the hoisting angle of the boom, there is a problem that the hose projects outward or the bending radius of the hose becomes small, and the hose is damaged, and if the workbench can be swung freely,
There was a problem that the hose was twisted when the work table was swung.

(4) Means for Solving the Problems In order to solve the above problems, the present invention equilibrates the worktable to the tip of the boom so that the worktable can be freely swung, and water or air is transferred from the base end of the boom to the worktable. In an aerial work vehicle in which piping for sending fluid such as is installed along the boom, the fourth work located at the base end of the boom
The base end of the pipe is connected to the pipe attached to the discharger that discharges the fluid provided on the vehicle body, etc., via a fourth swivel joint located on the pivot axis of the boom so that it can swing in a vertical plane. Then, the base end of the third pipe located on the side of the boom is swingably connected to the tip end of the fourth pipe in a vertical plane through a third swivel joint, and the base end of the second pipe located at the tip of the boom. Is swingably connected to the tip of the third pipe through a second swivel joint in a vertical plane, and the base end of the first pipe attached to the workbench is attached to the tip of the second pipe and the swing center of the workbench is attached. It is swingably connected in a horizontal plane via a first swivel joint located on the axis.

(5) Operation With the above configuration, when the workbench swings due to the hoisting motion of the boom, the first pipe and the second pipe swing the third pipe around the third swivel joint, and the fourth pipe moves to the fourth pipe. 4 Swivels around the swivel joint, and the movement of the first and second pipes due to the swinging of the workbench accompanying the ups and downs of the boom is absorbed by the swinging of the third and fourth pipes to swing the workbench. At times, the first pipe swings around the first swivel joint to follow the swing of the workbench.

(6) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 shows an aerial work vehicle having a bending type boom, and a turntable (3) is rotatably mounted on a vehicle body (1) supported by four outriggers (2), and the turntable (3 ), The base end of the lower boom (4) is pivotally supported, and the lower boom (4) is undulated by the extension and contraction of the turntable (3) and the undulating cylinder (5) whose both ends are pivotally supported by the lower boom (4). ), The base end of the upper boom (6) is pivotally supported by a shaft (24), and the upper boom (6) is extended and contracted by a bending and stretching cylinder (7) whose both ends are pivotally supported by the lower boom (4) and the upper boom (6). The upper and lower booms (6) are bent and extended, and a bracket (8) is pivotally supported on the tip of the upper boom (6) so as to be swingable in a vertical plane, and the bracket (8) is lifted and lowered by a balance holding device (not shown). Flexing the upper boom Regardless always held horizontally, workbench by a shaft (23) (9) is mounted for swinging the bracket (8).

1 and 2 show a piping device for sending a fluid to a workbench (9), and a sixth pipe (21) having a base end attached to a discharger (not shown) for discharging the fluid has a turntable (3). ), The proximal end of the fifth pipe (19) is swingably connected to the tip of the sixth pipe (21) through a fifth swivel joint (20) in a vertical plane, and the fifth pipe (19) 19) is attached to the side surface of the lower boom (4), and the base end of the fourth pipe (17) located at the base end of the upper boom (6) is connected to the fifth pipe (2).
1) The upper boom (6) side is swingably connected to the tip end of (1) through a fourth swivel joint (18) located on the axis of the pivot shaft (24) of the upper boom (6) so as to swing freely in the vertical plane. The proximal end of the third pipe (15) located on one side is connected to the fourth pipe (1
The tip end of 7) is swingably connected to a vertical plane through a third swivel joint (16), and the base end of the second pipe (13) located at the tip of the upper boom (6) is connected to the third pipe (15).
The tip end of the second pipe (1) is swingably connected to a vertical plane through a second swivel joint (14).
3) is attached to the bracket (8), the base end of the first pipe (11) attached to the workbench (9) is attached to the tip of the second pipe (15), and the swing center shaft (23) of the workbench (9) is attached. ), Which is swingably connected to a horizontal plane via a first swivel joint (12) located on the axis center of the nozzle (10) provided on the workbench (9) at the tip of the first pipe (11). Connect to.

With the above configuration, when discharging a fluid using an aerial work vehicle, the lower boom (4) is undulated or the upper boom (6) is bent and extended in order to move the workbench (9) to an arbitrary position. And the bracket (8) swings in a vertical plane as the lower boom (4) rises and falls and the upper boom (6) flexes and extends to keep the workbench (9) horizontal.
With the swing of the workbench (9), the first pipe (11) and the second pipe (13) move with respect to the upper boom (6), and the third pipe (15) is connected to the third swivel joint (1).
6) as the center, and the fourth pipe (17) as the fourth swivel joint (18) as the center, the first pipe (11) and the second pipe accompanying the swing of the work table (9). The movement of the pipe (13) is changed to the third pipe (15) and the fourth pipe (1).
Absorb by swinging 7). When the workbench (9) is swung with respect to the bracket (8), the first pipe (11) attached to the workbench (9) sways in the horizontal plane around the first swivel joint (12). The first pipe (11) follows the movement of the work table (9) due to the swinging work of the work table (9).

Although the aerial work vehicle having the bending type boom has been described in the above embodiment, as shown in FIG. 4, the aerial work vehicle having the direct extending type boom also has the third pipe (1).
The present invention can be implemented by replacing 5) with a pipe that expands and contracts in conjunction with expansion and contraction of the boom.

(7) Effects of the Invention As described above, according to the present invention, since the pipes are swingably connected through the swivel joint, the movement of the pipes attached to the workbench due to the swinging of the workbench accompanying the boom hoisting motion Is provided by the swinging of the pipe, and the swinging motion of the workbench can be followed by the swinging of the pipe, thereby providing a piping device for an aerial work vehicle capable of preventing damage to the pipe or the like. .

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a side view of a piping device, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is a side view of an aerial work vehicle having a bending boom. The figure is a side view of an aerial work vehicle having a direct extension boom. 4 ... lower boom, 6 ... upper boom, 9 ... worktable, 11 ... first piping, 12 ... first swivel joint, 13 ... second piping, 14 ... second swivel joint, 15 ... second 3 pipes, 16 ... 3rd swivel joint, 17 ... 4th pipe, 18 ... 4th swivel joint.

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A boom for an aerial work vehicle, comprising: The base end of the fourth pipe located at the base end is attached to the pipe attached to the discharger for discharging the fluid provided on the vehicle body or the like, and the vertical surface is formed through the fourth swivel joint located on the pivot axis of the boom. It is swingably connected to the inside of the boom, and the base end of the third pipe located on the side of the boom is swingably connected to the tip of the fourth pipe in the vertical plane through the third swivel joint and is positioned at the boom tip. The proximal end of the second pipe is connected to the distal end of the third pipe via a second swivel joint so as to be swingable in a vertical plane,
It is characterized in that the base end of the first pipe attached to the workbench is swingably connected to the tip of the second pipe through a first swivel joint located on the swing center axis of the workbench in the horizontal plane. Plumbing equipment for aerial work vehicles.