JPH03292290A - Belley landing safety device for aircraft - Google Patents

Abstract

PURPOSE:To safely land without the occurrence of firing due to the generation of heat by rotating a belly landing safety device around a hinge shaft through operation of a drive device when an aircraft effects belly landing due to the occurrence of an accident, and slipping on a runway in a state that a board having the low coefficient of friction is protruded to the outside. CONSTITUTION:When an aircraft 1 effects belly landing due to the occurrence of an accident, by operating an operation switch 15 by a pilot, a drive device 10 is actuated, and a belly landing safety device 6 is turned over around a hinge 18. In which case, the outer surface of a board 20 forms a lowermost surface, which is brought into contact with a runway. Since the board 20 is made of Teflon or an inflammable composite material having the low coefficient of friction, the generation of a friction heat is reduced, and landing is practicable without the occurring of firing. Provided firing occurs, by operating an operation switch 15, a motor 11 is run to actuate a valve opening device 9, the valve is opened to actuate an extinguisher 7, and the firing is extinguished. This constitution performs safe belly landing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an aircraft fuselage landing safety device applied to an aircraft.

[Prior Art] If an aircraft malfunctions and the legs do not come out, in the worst case scenario, the aircraft may have no choice but to land on its belly without the legs coming out.

As shown in FIGS. 9 and 10, when the aircraft 1 makes a belly landing, fire extinguishing agent a is sprayed from the fire truck 24 onto the runway 25, and the aircraft 1 is directed to land at the sprayed position.
is controlled by the pilot.

Also, at this time, a fire engine 24 is on standby beside the runway 25, and if a fire breaks out, it will immediately begin extinguishing operations.

[Problem to be solved by the invention]

As mentioned above, if an aircraft makes a belly landing due to an accident,
A huge amount of preparation was required, and many people were required to stand by and land the aircraft on its belly. Furthermore, even if this method is used, there is a risk of a fire occurring, so a safer method has been desired.

[Means for Solving the Problems] The present invention achieves #1 above. The following measures will be taken to solve the problem.

That is, as an aircraft fuselage landing safety device, there is a fuselage safety device that has plates with a low friction coefficient on the inner and outer surfaces and is hinged to the lower part of the fuselage of the aircraft, and the fuselage safety device is rotationally driven around the axis of the hinge. A driving device is provided.

[Operation] When the aircraft makes a belly landing due to an accident, the drive device is actuated by the above means, and the body safety device is rotated about the axis of the hinge, so that the plate with a low coefficient of friction comes out and points downward.

After that, when a belly landing is performed, the board slides on the runway. The board has a low coefficient of friction, so it can land safely without igniting due to heat generation.

This allows for a safe belly landing.

(Example) A first example of the present invention will be described with reference to FIGS. 1 to 5.

1 is a side view, FIG. 2 is a cross-sectional view, FIG. 3 is an explanatory view of the operation, FIG. 4 is a partial detailed view of the body safety device, and FIG. 5 is a block diagram.

In FIGS. 1 and 2, body safety devices 6 are provided on the left and right sides of the lower center of the fuselage 2 of the aircraft 1. The body safety device 6 has a substantially rectangular cutout along the axial direction of the body 2.
It is provided in the notch. As shown in FIG. 4, the outer plate 19 has the same shape as the body 2 before the cutout, and a plate 20 made of Teflon or a noncombustible composite material with a low coefficient of friction is attached to the inner surface of the outer plate 19. Further, the lower side of the body safety device 6 is connected to the body with a hinge 18, and is attached so that it can be rotated around the axis of the hinge 18 by a drive device 10. Furthermore, fire extinguishers 7 are arranged at predetermined intervals along the upper side of the cutout portion of the body 2. Further, the valve of each fire extinguisher 7 is connected to a valve opening device 9 having a motor 11. These motor 11 and drive device 10 are connected to an operation switch 15 in the cockpit, as shown in FIG.

In the above configuration, when the aircraft 1 makes a belly landing due to an accident, when the pilot operates the operation switch 15, the drive device 10 is actuated to move the body safety device 6 to the hinge 1.
8 axis (see Figure 3). Then board 20
The outer surface of the plane will be the lowest surface and will touch the runway. Since the plate 20 is made of Teflon or a non-combustible composite material with a low coefficient of friction, it generates little frictional heat and can land without igniting. In the event that a fire ignites, operating the operation switch 15 will turn the motor 11 and activate the valve opening device 9 to open the valve and activate the fire extinguisher 7 to extinguish the fire.

In this way, a safe belly landing can be performed.

A second embodiment of the invention is shown in FIG. In this example, body safety devices 6a, 6b, 6c, and 6d are placed on the left and right sides of the lower part of the body 2.
The body 2 is divided and arranged in the axial direction. The other configurations and operations are substantially the same as those of the above embodiment, so their explanation will be omitted.

Another example of the fire extinguisher 7 used in the first and second embodiments will be explained with reference to FIGS. 7 and 8.

A plug 21 is inserted into the outlet of the fire extinguisher 7a. The stopper 21 is held down by a shape-memory alloy holding plate 22, and the end of the holding plate 22 is bitten and fixed in the neck portion of the fire extinguisher 7a. At this time, a spring 26 is placed between the end face of the outlet portion and the presser plate 22, and is in a compressed state (FIG. 7).

In the above configuration, when the body safety device ignites and reaches a high temperature, the presser plate 22 is heated, and when the temperature reaches a predetermined temperature, the end portion of the presser plate 22 expands and comes off from the neck portion. Then, the plug 21 is released by the spring 26 (FIG. 8), and extinguishing agent is ejected to extinguish the fire.

In this way, when a fire is ignited, the fire extinguisher 7a automatically sprays out a fire extinguishing agent to extinguish the fire.

[Effect of the invention] As explained above, the present invention has the following effects.

(1) Belly landing of aircraft, which has been a problem in the past, can be performed more safely, contributing to the safe operation of aircraft.

(2) The time during which the airport is closed due to belly landing can be significantly reduced compared to the past, and the materials, personnel, etc. required for firefighting operations can also be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a side view of the first embodiment of the present invention, FIG. 2 is a cross-sectional view of the same embodiment, FIG. 3 is an explanatory diagram of the operation of the same embodiment, and FIG.
The figure is a partial detailed view of the Kiri-gi safety device section of the same embodiment, Figure 5 is a block diagram of the same embodiment, Figure 6 is a side view of the second embodiment of the present invention, and Figure 7 is the above implementation. FIG. 8 is a side view of another embodiment of the fire extinguisher, FIG. 8 is an explanatory diagram of the operation of the same embodiment, and FIGS. 9 and 10 are explanatory diagrams of the operation of the conventional example. 1... Aircraft, 2... Fuselage, 6.6a
, 6b, 6c, 6d - Body safety device, 7.7a... Fire extinguisher, 9... Fire extinguisher valve opening device, 10... Drive device, 11... Motor, 15... Operation switch, 18... Hinge, 19... Fuselage outer plate, 20... Teflon or non-combustible composite material (carbon/carbon), 21... Plug, 22... Shape memory alloy presser plate, 24... Fire engine, 25... runway,
26...Spring.

Claims (1)

[Claims] The aircraft is characterized by comprising: a body safety device having a plate with a low coefficient of friction on its inner surface and hinged to the lower fuselage of the aircraft; and a drive device driving the body safety device to rotate around the axis of the hinge. Aircraft fuselage landing safety device.