JPH0353240B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to aircraft cargo handling vehicles such as container loaders and pallet loaders used for carrying cargo into and out of aircraft.

"Prior Art" In general, cargo handling vehicles such as container loaders or pallet loaders are used in cargo handling operations such as loading cargo onto an aircraft and removing cargo from an aircraft.

FIG. 4 is a side view showing an example of this type of container loader, in which reference numerals 1, 2 and 3 indicate a running truck, 2 and 3.
are a main platform and a bridge platform provided on the truck 1.

These main platform 2 and bridge platform 3 are attached to the traveling bogie 1 via scissor links 6 and 7 which are operated by hydraulic cylinders 4 and 5 to bend and extend, respectively. As shown by the chain lines, each can be raised and lowered independently. In addition, each platform 2 and 3
As shown in FIG. 5, a belt conveyor 8 and guide rails 9 for sequentially transporting containers are arranged on the upper surface of the container.

At approximately the center of the front end (right end in the figure) of the bridge platform 3, a transport tire device 10 for transporting cargo is provided. This transfer tire device 10
As shown in FIGS. 5 and 6, the hydraulic cylinder 11 is attached to the lower surface of the platform 3 facing forward, one end is connected to the rod tip of this hydraulic cylinder 11, and the center part is a pivot support. It consists of an L-shaped arm 12, which has a cylindrical shape, and two transport tires 13, 13, which are pivotally supported on both sides of the other end of the arm 12 and arranged at the front end of the platform 3. And the transfer tires 13, 13
are simultaneously moved up and down by hydraulic cylinders 11 and rotated by a drive mechanism (not shown) to sequentially transport the containers.

In order to carry containers into and out of an aircraft using such a container loader, as shown in FIGS. 4 and 7, the container loader is first attached to the aircraft P, and the bridge platform 3 Raise it and match the height of its upper surface with the cargo conveyance road surface F inside the aircraft P. Next, after raising the main platform 2 to the same height as the bridge platform 3, the hydraulic cylinder 11 of the transfer tire device 10 is activated to raise the transfer tires 13, 13 so that their upper ends are on the platform 3. Adjust so that it slightly protrudes from the center. Next, the belt conveyor 8 and transfer tires 13, 13 on the upper surfaces of the platforms 2, 3 are rotated to transfer containers between the main platform 2 and the cargo hold of the aircraft P.

At this time, as the weight of the aircraft P changes as the containers are carried in and out, the main body of the aircraft P moves up and down slightly, creating a level difference between the cargo conveyance road surface F and the top surface of the platform 3. In such a case, the hydraulic cylinder 11 of the transfer tire device 10 is operated again to move the transfer tires 13, 13 up and down, so that the transfer tires 13, 13 to approximately the same height as the upper end of container C.
This prevents people from getting stuck on the stepped part.

``Problems to be solved by the invention'' By the way, the cargo hold of aircraft P is long in the longitudinal direction of the aircraft, so it is difficult to carry containers in and out.
Due to the unloading process, an imbalance in weight occurs between the front and rear portions of the aircraft P. Therefore, the aircraft P does not move up and down in a horizontal state, but moves up and down while tilting either forward or backward, as shown by the two-dot chain line in FIG. Therefore, the cargo transport surface F in the aircraft P is inclined in the width direction of the platform 3, and the level difference between the transport surface F and the platform 3 is slightly different on the left and right sides.

However, in the conventional container loader transfer tire device 10, the two transfer tires 13, 13 are pivotally supported by the same arm 12, and each tire 1
The heights of the upper ends of 3 and 13 are always equal.
For this reason, when one tire 13 is adjusted to an appropriate height, the height of the other tire 13 must be inappropriate, and therefore, if the inclination of such aircraft P becomes particularly large, However, there were drawbacks such as the container getting stuck on either the left or right side of the step, making it impossible to transfer, and the container tending to sway from side to side and become unstable when passing through the step.

``Means for Solving the Problems'' The cargo handling vehicle of the present invention is characterized in that a plurality of transfer tires arranged at the front end of the platform are individually movable up and down.

"Function" In the present invention, when an inclined level difference occurs between the aircraft cargo transport path and the platform, each transport tire is moved up and down separately to bring the upper end of each transport tire to the aircraft transport road surface. By aligning it with whichever is higher on the top of the platform, it prevents cargo passing through this step from being caught or swaying from side to side.

"Embodiment" Hereinafter, an embodiment of the present invention will be described in detail using the drawings.

1 to 3 show the main parts of a container loader (aircraft cargo handling vehicle) according to an embodiment of the present invention, in which FIG. 1 is a plan view, FIG. 2 is a side sectional view, and FIG.
The figure is a front view.

In the figure, reference numeral 14 is a bridge platform, and on this bridge platform 14,
Transfer rollers 15 and guide rails 16 are arranged in the front and rear direction, and these constitute a container transfer path.

Approximately at the center of the front end of the platform 14 is a rectangular notch, into which a shaft 18 extends horizontally in the width direction of the platform. This shaft 18 has three L-shaped arms 19, 19, 1
9 are rotatably supported through the center at regular intervals, and are arranged with one end facing forward and the other end facing downward. Transfer tires 20, 20, 20 are pivotally supported at the front ends of these arms 19, 19, 19, respectively, and are rotated by a drive mechanism (not shown). In addition, each arm 19,
Rods of hydraulic cylinders 21, 21, 21 are rotatably connected to the lower ends of the cylinders 19, 19, respectively. And these hydraulic cylinders 2
1, 21, 21 are arranged facing forward on the lower surface of the platform 14, and their ends are connected to brackets 22, 2 fixed to the lower surface of the platform 14.
2 and 22, respectively. As a result, when the hydraulic cylinder 21 is actuated and the rod moves back and forth, the arm 19 is rotated and the transfer tire 20 is rotated.
is designed to move up and down.

According to a container loader with such a configuration, 3
The two transfer tires 20, 20, 20 can be moved up and down separately and placed at different heights, so that when the bridge platform 14 faces the cargo path of the aircraft, the aircraft If the aircraft is tilted forward or backward, the hydraulic cylinders 21, 21, 21 are operated in sequence as shown in FIG. It can be roughly adjusted to the higher one. Therefore, it is possible to prevent the container being transferred between the platform 14 and the aircraft from getting stuck on these steps or becoming unstable due to wobbling, which is difficult to deal with with conventional container loaders. Even if the aircraft has a large inclination in the longitudinal direction, containers can be transferred smoothly.

In the above embodiment, all three transfer tires are vertically movable, but only the center transfer tire among the three may be fixed. Further, in the above embodiment, there are three transfer tires, but the present invention is not limited to this, and a configuration in which two or four or more transfer tires are provided can also be implemented.

Furthermore, the mechanism that moves the transport tires up and down,
The moving mechanism is not limited to a hydraulic cylinder, but may also be a manual movement mechanism, a motor movement mechanism, or the like.

``Effects of the Invention'' In the aircraft cargo handling vehicle of the present invention, a plurality of transfer tires arranged at the front end of the platform are each movable up and down separately, so that the aircraft tilts forward and backward, causing the platform and the aircraft to collide. Even if there is a sloped step between the conveyor paths,
By making the height of the upper end of each transfer tire substantially match the higher side of either the platform or the conveyance road surface, it is possible to prevent the cargo from getting stuck or wobbling on the stepped portion, and smooth cargo transfer is possible.

[Brief explanation of drawings]

1 to 3 show a container loader (aircraft cargo handling vehicle) according to an embodiment of the present invention, in which FIG. 1 is a plan view of the main part, FIG. Figure 3 is a front view of the main parts. 4 to 7 show a conventional container loader, where FIG. 4 is an overall side view, FIG. 5 is a plan view of the main parts, FIG. 6 is a side sectional view of the main parts, and The figure is a schematic diagram showing how the container loader is used. 14... Bridge Platform, 18...
Shaft, 19... L-shaped arm, 20... Transfer tire, 21... Hydraulic cylinder, F... Aircraft transfer road surface.

Claims (1)

[Scope of Claims] 1. A platform is provided on a traveling truck, a transport tire for transporting cargo is provided at the front end of the platform, and the transport tire is arranged to face the cargo transport path of an aircraft. An aircraft cargo handling vehicle that transfers cargo between a platform and a cargo hold of an aircraft, characterized in that a plurality of the transfer tires are arranged side by side in the width direction of the platform, and each of these transfer tires can be moved up and down independently. An aircraft cargo handling vehicle.