JPH0226800Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The present invention relates to a platform height adjustment device for a container loader, and is particularly used when loading cargo into or out of an aircraft. The present invention relates to a height adjustment device suitable for application to a container loader.

``Prior Art'' Generally, a container loader as shown in FIG. 5 is used for carrying cargo into and out of an aircraft.

This container loader 1 is provided with a platform 3 that is movable up and down on a traveling truck 2, and a scissor link 4 that connects the platform 3 and the traveling truck 2 in a relatively movable manner. A fluid pressure cylinder 5 is provided between the platform and the traveling carriage 2, and by driving the scissor link 4 by the fluid pressure cylinder 5, the platform 3 is moved as shown by the arrow in FIG. Cargo, etc. on the platform 3 can be taken in and out of the cargo hold of the aircraft A by raising and lowering the platform 3 so that its upper surface is approximately at the same height as the floor of the cargo hold of the aircraft A (not shown).

By the way, in carrying in and carrying out cargo, etc. using the container loader 1 described above, as the work progresses, for example, during the carrying out operation, the weight of the aircraft A becomes lighter and the aircraft A moves upward. A phenomenon occurs. If such a phenomenon occurs, a gap may be generated between the floor of the cargo hold and the top of the platform 3, which may impede the work of carrying out cargo, etc. Additionally, during the loading process, due to the increased weight of aircraft A, aircraft A moves downward and collides with or comes into pressure contact with platform 3, and the door of aircraft A that is in an open state and the platform 3 Because the gap with the container is narrow, there is a risk that the two will collide or come into contact, causing damage to both.

Therefore, conventionally, while the above-mentioned work is being performed, the operator constantly monitors the relative positional relationship between the aircraft A and the platform 3, and also drives the fluid pressure cylinder 5 to raise the height of the platform 3. By making adjustments, it is possible to prevent any deviation between the two.

"Problems to be Solved by the Invention" The present invention attempts to solve the following problems of the prior art described above.

That is, in the conventional technology, when loading and unloading cargo, etc., in addition to the personnel handling the cargo, it is necessary to have a full-time staff operating the platform 3, resulting in an increase in the number of workers. In addition, since the adjustment is done manually, the height is adjusted intermittently and the amount of adjustment becomes large.As a result, collisions between aircraft A and platform 3, or between an open door and a container, etc., are completely prevented. This is a problem in that it cannot be an effective means to avoid this.

"Means for Solving the Problems" The present invention aims to provide a platform height adjustment device for an aircraft container loader that can solve the above-mentioned conventional problems. and the platform.
A hydraulic cylinder for raising and lowering the platform is provided, and the platform includes a switching valve for switching the driving direction of the hydraulic cylinder, and the hydraulic cylinder is connected to the outer surface of the aircraft and is moved as the aircraft and the platform move relative to each other. a lifting rod, a vacuum suction pad having one end connected to the outer surface of the aircraft, and a suction device for creating a vacuum state inside the vacuum suction pad, and The present invention is characterized in that a control means is provided between the lifting rod and the switching valve for driving the switching valve in accordance with the moving direction of the lifting rod.

``Function'' The height adjustment device of the present invention converts the relative movement between the aircraft and the platform into the relative movement between the lifting rod and the platform, and also detects the relative movement between the lifting rod and the platform, and uses the detection results to The platform is raised and lowered by driving the switching valve for the fluid pressure cylinder based on the
This system automatically and continuously adjusts the relative positional relationship with the aircraft.

"Example" The following is an example of the present invention in Figures 1 to 3.
This will be explained based on the diagram. In addition, in the following explanation, the fifth
The same reference numerals are used for parts common to the figures to simplify the explanation.

Reference numeral 6 in FIG. 1 indicates a height adjusting device according to the present embodiment, which is a height adjusting device for the traveling bogie 2 of the container loader 1.
A hydraulic cylinder 5 for raising and lowering the platform 3 is provided between the platform 3 and the platform 3, and a switching valve 7 for switching the driving direction of the hydraulic cylinder 5 is connected to the platform 3 and connected to the outer surface of the aircraft A. A lifting rod 8 is provided which is moved relative to the platform 3 as the aircraft A and the platform 3 move relative to each other.
A vacuum suction pad 14 is provided, one end of which is connected to the outer surface of the aircraft, and the vacuum suction pad 14
A suction device 16 that creates a vacuum state inside the suction device is connected to the suction device 16, and a control device is provided between the lifting rod 8 and the switching valve 7 to drive the switching valve 7 in accordance with the moving direction of the lifting rod 8. It has a schematic configuration in which a means 9 is provided.

Next, to explain these details, as shown in FIG. 1, the switching valve 7 is attached to the lower surface of the tip part (right side in FIG. 1) of the platform 3, and as shown in FIG. , pressure oil generator 1
0 and the fluid pressure cylinder 5 are connected.

The elevating rod 8 includes a pair of rods 11 and 12 that are slidably fitted together, a bolt 13 that fixes both rods 11 and 12, and one end of one of the rods 11 and 12. It is composed of a swingable vacuum suction pad 14 and a spring-type shock absorber 15 provided in the middle of the rod 11. Further, a flexible hose 17 is connected to the vacuum suction pad 14 to connect the vacuum suction pad 14 to a suction device 16 provided on the traveling carriage 2.

The control means 9 includes a pair of rotation links 18 and 19 rotatably attached to the lower surface of the platform 3, and is provided between these links 18 and 19 and rotates both rotation links 18 and 19. A connecting link 20 that is movably connected and both rotating links 1
One rotary link 19 of 8, 19 is connected to the switching valve 7.
The connecting link 21 is rotatably connected to the operating lever 7a. And another rotation link 1 among the rotation links 18 and 19
8, the other end of the elevating rod 8, that is, the other end of another rod 12, is rotatably connected.

On the other hand, as shown in FIG. 2, the fluid pressure cylinder 5 in the Hori embodiment is connected with a manual switching valve 22, and a switching valve 7 of the height adjustment device 6 is connected thereto.
The fluid pressure cylinder 5 can be driven independently from the hydraulic cylinder 5. In addition, the flexible hose 1
An on-off valve 23 is provided in the middle of the on-off valve 2.
3 is a holder 24 fixed to the rod 11 and provided on the outer surface of the traveling carriage 2.
The lifting rod 8
is fixed to the traveling carriage 2.

Next, the operation of the height adjusting device 6 of this embodiment will be explained as follows.

First, after moving and stopping the container loader 1 to the lower part of the aircraft A, the manual switching valve 22 is operated to raise the platform 3 so that its upper surface is at the same level as the floor of the cargo hold of the aircraft A. let

From this point, as shown by the chain line in FIG.
By pressing it against the outer surface of the aircraft A and opening the on-off valve 23, the vacuum suction pad 14 is attracted to the outer surface of the aircraft A, and one end of the elevating rod 8 is fixed to the aircraft A, thereby setting it in an operable state. can. In this state, the switching valve 7 of the height adjusting device 6 is maintained in a neutral position, that is, in a state in which the supply of pressure oil to the hydraulic cylinder 5 is stopped.

When transporting cargo, etc., aircraft A
When the weight of the aircraft A becomes lighter and the aircraft A is raised relative to the platform 3, as the aircraft A rises, the elevator rod 8 is pulled upward, as shown by the chain line in FIG. Each rotation link 18, 19 of the control means 9 and the operation lever 7a of the switching valve 7 are rotated in the direction of the arrow in the figure, and the switching valve 7 is driven. As a result, pressure oil is supplied to the hydraulic cylinder 5, and the platform 3 is moved in the direction of movement of the aircraft A, that is, upward.

On the other hand, if such movement of the platform 3 continues, the distance between the aircraft A in the raised position and the platform 3 will be narrowed, and the lift rods 8, rotation links 18, 19, and operating lever 7a will be moved. It is moved or rotated relative to the platform 3 in a direction opposite to the above-mentioned direction. When the top surface of the platform 3 and the floor surface of the cargo hold are at the same level, the platform 3 is returned to its initial set state, the switching valve 7 is returned to the neutral position, and the platform 3 is returned to its initial setting state. 3 is stopped from rising.

In addition, when the aircraft A descends due to increased weight, such as when loading cargo, etc., the lifting rod 8, the control means 9, and the switching valve 7 are operated in the opposite direction to the above-mentioned direction. , descended aircraft A
Platform 3 is positioned in the cargo hold of

When the platform 3 is lifted and lowered, the lifting rod 8 engages the vacuum suction pad 14.
The operating lever 7 of the switching valve 7 is attached to the lifting rod 8.
a are integrally connected via the control means 9, the relative movement between the platform 3 and the aircraft A is immediately transmitted by the lifting rod 8 and the control means 9 to the operating lever 7a. Therefore,
The responsiveness of the switching valve 7 to the above-mentioned relative movement is high, and the distance between the aircraft A and the platform 3 is maintained at approximately the initially set distance. Further, since the lifting rod 8 is connected to the aircraft A by the vacuum suction pad 14, no special jig or device is required when setting it on the aircraft A, and it can be easily and easily attached to various aircraft A. , it can be attached and detached without causing damage to aircraft A. Furthermore, by means of a shock absorber 15 provided on the lifting rod 8, the aircraft A
This prevents damage to both by alleviating the impact force during rapid relative movement between the platform and platform 3.

In the above embodiment, the rotary links 18 and 19 and the connecting links 20 and 21 were shown as control means, but instead of this, for example, as shown in FIG. At the same time, a solenoid 26 that is operated by an electric signal output from the rotary encoder 25 and drives the switching valve 7 is connected to the switching valve 7. Therefore, the control means 27 is configured, and the aircraft A and the platform 3
Relative movement such as approach and departure from the aircraft is detected by the rotation direction of the rotary encoder 25, and the solenoid 26 is operated based on the detection result, thereby switching and driving the switching valve 7 to switch the platform 3 to the aircraft A. It may be made to follow the movement of.

With this configuration, the structure of the control means 27 is simplified, the space around the platform 3 is increased, and the number of protruding parts and movable parts that become obstacles during work is minimized. This can improve work safety.
Furthermore, since the relative movement between the aircraft A and the platform 3 can be extracted as an electrical signal, it is suitable for monitoring the operating state of the device.

"Effects of the Invention" As explained above, the platform height adjustment device for an aircraft container loader according to the present invention provides the following excellent effects.

Even if the aircraft moves up and down when loading or unloading cargo, etc. to the aircraft, the positional relationship between the aircraft and the platform can be maintained in the initial good condition, making loading and unloading operations easier. , it is possible to reliably prevent damage to aircraft or platforms.

By automatically following the vertical movement of the aircraft on the platform, it is possible to save labor in loading and unloading cargo, etc.

Since the device and the aircraft are connected using vacuum suction pads, the connection can be made reliably and firmly without causing damage to the aircraft, preventing the lifting rod from shifting its position, and making it easier to attach and detach it. to make it extremely simple.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, with Figure 1 being an enlarged side view of the main parts, Figure 2 being a schematic diagram of the hydraulic circuit for driving the platform, and Figure 3 being a schematic diagram of the hydraulic circuit for driving the platform. 4 is a diagram similar to FIG. 1 showing another embodiment of the present invention, and FIG.
The figure is a schematic side view showing an example of the structure of a container loader. 1...Container loader, 2...Traveling trolley, 3...
...Platform, 4... Scissor link, 5...
...Fluid pressure cylinder, 6...Height adjustment device, 7...
Switching valve, 8... Lifting rod, 9, 27... Control means, 14... Vacuum suction pad, 16... Suction device, 18, 19... Rotating link, 20, 21...
Connection link, 23...Opening/closing valve, 25...Rotary encoder, 26...Solenoid.

Claims (1)

[Scope of utility model registration request] A height adjustment device for directing a platform provided on an aircraft container loader so as to be freely raised and lowered to face a cargo hold of the aircraft, wherein a hydraulic cylinder is provided between the container loader and the platform to raise and lower the platform. the platform is provided with a switching valve for switching the driving direction of the fluid pressure cylinder, and a lifting rod connected to the outer surface of the aircraft and moved as the aircraft and the platform move relative to each other; is provided with a vacuum suction pad whose one end is connected to the outer surface of the aircraft, and the vacuum suction pad is provided with:
A suction device that creates a vacuum state inside the rod is provided, and a control means is provided between the lifting rod and the switching valve to drive the switching valve in accordance with the moving direction of the lifting rod. Features: Platform height adjustment device for aircraft container loaders.