JPH0357549Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an aircraft container loader suitable for use in loading and unloading cargo, etc. to and from an aircraft.

"Prior Art" Generally, a container loader (cargo handling vehicle) is used to carry cargo into and out of an aircraft.

FIG. 2 is a side view showing the configuration of a conventional container loader 1. As shown in FIG. In this figure, reference numeral 2 denotes the body of the container loader 1, and 3 and 4 denote a front platform (bridge platform) and a rear platform (main platform) on which cargo is loaded, respectively. These platforms 3 and 4 are connected to the vehicle body 2 by link mechanisms 5 and 6, and are movable up and down in the direction of arrow Y by means of hydraulic cylinders and hydraulic cylinders 7 (not shown). Handrails 8, 10, 11, 12 and handrail pipes 9 are provided on both sides of the upper surfaces of the front platform 3 and rear platform 4, respectively. Furthermore, a first ladder 14 and a second ladder 15 are provided below the entrance 3a between the side surface of the vehicle body 2 and the handrail 10 of the front platform 3, and the first ladder 14 and the second ladder 15 are provided for lifting and lowering workers. A ladder 14 is fixedly attached to the vehicle body 2, and a second ladder 15 moves up and down together with the front platform 3. In this case, the second ladder 15 has the front platform 3 in its lowest position.
It is formed to a length that maintains a predetermined distance from the road surface 16 when stored in _P1 .

In such a configuration, during cargo handling work, the front platform 3 and rear platform 4 are raised to the same height as the bottom of the aircraft cargo hold by the hydraulic cylinders and link mechanisms 5, 6, and cargo is loaded/unloaded. I do.

"Problems to be Solved by the Invention" By the way, the conventional container loader 1 described above has the following problems. Depending on the ground clearance of the main deck of the aircraft cargo hold, the raised position _P2 of the front platform 3 needs to be raised correspondingly to the ground clearance. In this case, the first ladder 14
and the second ladder 15 are not connected, and the distance L between the ladders 14 and 15 becomes large. As a result, when the worker descends from the front platform 3 to the vehicle body 2, there is a risk of falling.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an aircraft container loader that can improve safety by preventing falling accidents.

``Means for Solving the Problems'' The present invention provides a platform that is movable up and down, provided between a first handrail portion and a second handrail portion, and the second handrail portion.
a door rotatably attached to a handrail, and locking means for locking the door and the first handrail when the platform rises above a certain height. It is.

``Operation'' According to the present invention, when the distance between the platform and the container loader exceeds a predetermined height, the door is locked, making it impossible to descend to the ground using a ladder.

"Embodiment" Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a side view showing the configuration of the front platform 3 side of the aircraft container loader 20 according to this embodiment. Components shown in this figure that are the same as those shown in FIG. 2 are given the same reference numerals, and their explanations will be omitted. The difference between what is shown in this figure and what is shown in FIG. 1 is that a door 21 is provided between the handrail pipe 9 and the handrail 10, and the door 21
A locking mechanism driven by, for example, an electromagnetic solenoid is provided between the door 21 and the handrail pipe 9 to lock the door 21 to the handrail pipe 9. 23 is provided. The lock mechanism 23 includes a substantially L-shaped lock plate 23a, a lock pin 23b provided in the handrail pipe 9, and an electromagnetic solenoid (not shown) that drives the lock pin 23b.
It is composed of. In this case, the lock plate 23
The end of a is attached and fixed to the door 21, and a hole is formed in the horizontal part at a position corresponding to the top of the handrail pipe 9. Further, the lock pin 23b is urged upward by a spring.

In this configuration, when the front platform 3 is below a predetermined height, the lock pin 23b is pulled into the handrail pipe 9 by the electromagnetic solenoid via the wire, and the lock is released. Next, when the front platform 3 reaches a predetermined height or more during cargo handling work, that is, when the angle between the link of the link mechanism 5 and the top surface 2a of the vehicle body 2 exceeds a predetermined angle, a limit switch provided on the vehicle body 2 side is activated. An actuator (not shown) is actuated by being struck by the link, and the electromagnetic solenoid is turned off based on the contact output of the switch. As a result, the lock pin 23b inside the handrail pipe 9 projects upward and is held in a position where the upper part of the pin 23b passes through the hole in the horizontal portion of the lock plate 23a. Thereby, the door 21 is locked to the handrail pipe 9.

According to the above configuration, when the front platform 3 reaches a predetermined height or higher, the door 21 is automatically locked, making it impossible to use the second ladder 15. As a result, the operator may accidentally It can prevent you from falling.

In the above embodiment, an electromagnetic solenoid is used as the driving means for the lock mechanism 23, but the invention is not limited to this, and a motor or the like may also be used. Alternatively, a hydraulic or pneumatic driving means may be used. Good too.

"Effects of the Invention" As explained above, according to the present invention, the platform is provided between the first handrail part and the second handrail part of the platform which can be raised and lowered, and the second handrail part is rotatable. The platform is configured to include a door attached to the platform, and locking means for locking the door and the first handrail when the platform rises above a certain height. When the height exceeds a certain level, the door is locked, thereby preventing falling accidents and improving safety.

[Brief explanation of the drawing]

FIG. 1 is a partial side view showing the structure of a container loader 20 according to an embodiment of the present invention, and FIG. 2 is a side view showing the structure of a conventional container loader 1. As shown in FIG. 2...Vehicle body, 3...Front platform, 5...Link mechanism, 9...Handrail pipe (first
handrail part), 10...handrail (second handrail part), 14
...First ladder, 15 ...Second ladder, 20
... Container loader, 21 ... Door, 22 ... Hinge mechanism, 23 ... Lock mechanism.

Claims (1)

[Scope of utility model registration request] a door provided between a first handrail portion and a second handrail portion of a platform that can be raised and lowered and rotatably attached to the second handrail portion; and a door that is rotatably attached to the second handrail portion; An aircraft container loader comprising: locking means for locking the door and the first handrail when the loader is raised to a higher level.