JPH0423760Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a kick-up type step device installed in an aircraft, particularly a helicopter.

[Technical Background and Prior Art] In aircraft such as helicopters, the door device generally has a structure in which one side of the door is rotatably supported by a hinge.

However, when a helicopter equipped with a door device of this type is used for emergency purposes, the door becomes a hindrance to hoisting a rescued person from a stationary helicopter using a life rope and stowing the person inside the helicopter. Work isn't progressing as expected.

Conventionally, when going on a rescue mission, the door was removed from the helicopter in advance and the helicopter went to the scene.

However, if the door is removed, wind will enter from outside the aircraft during the flight, not only making it cold for the crew, but also risking further depletion of the physically weak rescuers. It is dangerous as there is a risk of falling.

In order to solve these problems, it may be possible to install a sliding door device, which is often used in automobiles.

On the other hand, important equipment such as the engine, transmission, and main rotor is mounted on the top of a helicopter, and requires routine inspection and maintenance.
For this reason, steps are attached to the side wall of the aircraft,
Allows workers to easily access the upper part of the machine.

Conventionally, this type of step was fixed to the aircraft body, so if the door was modified to be a sliding type, there was a problem that it would interfere with the step when the door was opened or closed.

[Purpose of the invention] Therefore, the purpose of the present invention is to propose a kick-up step device that avoids interference with a sliding door.

[Structure of the invention] The kick-up step device of the invention includes a board fixed to a side wall of an aircraft body adjacent to a sliding door, a pair of flanges erected on the board, and a slide of the sliding door. a step body whose base end is pivotally connected to the flange so as to be rotatable around an axis substantially parallel to the direction; a spring biasing the tip of the step body to rotate in a direction in which the tip approaches the base plate; a rotating arm whose intermediate portion is pivotally attached to the step body so as to be rotatable about an axis perpendicular to the rotational axis of the step body; a striker attached to the step body so as to be slidable in parallel and against which a sliding door of an aircraft can come into contact; a retaining pin attached to the other end of the rotating arm; and a flange formed on the rear side of the sliding door of the pair of flanges. and two positioning holes into which the stop pins are inserted to position the step main body in the storage state and the use state.

[Operation and effect of the invention] Since the invention is constructed as described above, when inspecting or servicing the upper part of the aircraft, the striker is pulled down and used, and after use, the striker is pushed in and the spring is activated. As a result, the step stands upright and there is no protrusion, so interference with the sliding door is avoided.

Even if you forget to store the steps and open the sliding door, the metal fittings attached to the door will come into contact with the striker and pull up the steps, preventing damage to the door and steps. .

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is a side view of a helicopter equipped with the kick-up step device of the present invention, in which a main rotor 3 is disposed at the top of a fuselage 1 of the helicopter, and a tail rotor 4 is located at the rear end of the fuselage. It's profitable.

A skid 6 for grounding is provided at the bottom of the fuselage 1, and in the front side view of the machine, a door 2 for boarding a cockpit 5 is attached so as to be openable and closable.

A door 7 for boarding the cabin is provided behind the door 2, but this door 7 is of a sliding type and is attached to an upper rail 8 attached to the upper part of the aircraft body 1.
It is supported by three hinges 10, 11, and 12 on a lower rail 9 attached to the lower part of the fuselage 1, and is configured to slide open and close in the longitudinal direction of the fuselage.

The upper part of the fuselage is equipped with important equipment such as the bearings of the main rotor 3, the engine 12, and transmissions, which require maintenance and inspection.

A step is attached to the side of the fuselage 1 for maintenance and inspection of the upper part of the fuselage. Since this step protrudes from the fuselage, there is a risk that it may interfere with the sliding door when opening it. Therefore,
In the present invention, the step 30 is made with a pull-up mechanism, and is raised to the side of the machine body only when in use, and is pulled up to the side of the machine body when not in use, eliminating the protruding part and preventing interference with the sliding door. .

Moreover, when you forget to pull up the kick-up step and try to open the sliding door, the metal fitting 20 attached to the sliding door 7 connects to the kick-up step, and is pressed by this metal fitting 20, forcing the kick-up step to open. It also has a mechanism that allows the door to collide with the steps by pulling up.

Figures 2 and 3 show the details of the metal fittings to be attached to the sliding door, and the whole body is designated by the reference numeral 20.
The metal fitting indicated by 2 has a base plate 21 in contact with the surface of the door 7, and this base plate 21 is fixed to the top plate of the door by rivets 23.

A bar 22 is attached to the substrate 21 with screws 24, and the attachment position is adjusted so that the protruding end of the bar 22 presses a striker of a kick-up step to be described later.

Next, a kick-up step is shown in FIGS. 4 and 5, and the step, generally designated by the numeral 30, has a base plate 31 which includes bolts 32.
It is attached to aircraft 1 by. This board 31
A pair of flanges 33 stand vertically in parallel on the top, and a step body 35 is rotatably attached by a shaft 34 that connects these flanges 33.

The step body 35 is made of a plate material formed into a box shape, and the inside thereof is hollow. The step main body 35 is always urged by a spring 36 attached to the shaft 34 so as to be raised to the raised position shown in FIGS. 4 and 5.

On the other hand, a shaft 37 is implanted inside the step body 35, and an arm 38 is attached to the tip of this shaft 37.
is rotatably supported. One end of the arm 38 engages with the tip of a striker 40 slidably inserted into the bearing 39, and a pin 41 is attached to the other end of the arm. The pin is configured to pass through the step body and selectively enter one of two holes 42, 43 formed in the flange 33.

A spring 44 is attached between the arm 38 and the step body 35, and the arm 3
8 is constantly biased in the direction of pushing out the striker 40.

The kick-up step of the present invention is constructed as described above, and its operation will be explained next.

The step body 35 is normally stored in the state shown in FIGS. 4 and 5, and the pin 41 projects into the hole 42 to prevent the step body from swinging. When the step body 35 is in this position, the sliding door 7 does not interfere with the step body.
Can be opened and closed freely. Maintenance of the upper part of the fuselage,
When inspection is necessary, move the step body to shaft 3.
The striker 4 is rotated approximately 90 degrees around the striker 4 and pulled down to the use position.
0, rotate the arm 38 against the spring 44, pull out the pin 41 from the hole 42,
In this state, pull the step body 35 toward you. As a result, the step body 35 is pulled down toward the front against the spring 36, the pin 41 engages with the hole 43, and the step body is held in the pulled down position.

In this position, the step body can be used as a foothold to freely perform inspections, maintenance, etc. on the upper part of the machine.

After inspection, maintenance, etc. are completed, when the striker 40 is pushed, the pin 41 is pulled out from the hole 43, and the step body is flipped up by the force of the spring 36 and returned to the stored position, and the pin 41 is engaged with the hole 42. to return to the initial state. Even when the slide door 7 is opened without this storage operation being forgotten, the tip of the bar 22 of the metal fitting 20 attached to the slide door 7 pushes the striker 40, and the step body is automatically flipped up to the storage position.

[Effects of the invention] As described above, the invention is effective for helicopter inspection,
The steps essential for maintenance are now kitk-up type,
Even if you forget to return the step to its storage position and open the sliding door, the door metal fittings will automatically flip the step up, preventing collisions between the sliding door and the step. This has the effect of completely preventing damage to both.

[Brief explanation of the drawing]

Fig. 1 is a side view of a helicopter implementing the present invention, Fig. 2 is a front view of a metal fitting according to an embodiment of the present invention, Fig. 3 is a side view, and Fig. 4 is a front view of a kick-up step. Figure 5 is a side view. 1... Airframe, 3... Main rotor, 4... Tail rotor, 5... Cockpit, 7... Sliding door,
8, 9... Rail, 10, 11, 12... Hinge, 20... Metal fitting, 21... Board, 22... Bar, 30... Kick-up step, 31... Board, 33... Flange, 34 ...Shaft, 35
...Step body, 38...Arm, 40...Striker.

Claims (1)

[Scope of utility model registration request] a board fixed adjacent to a sliding door on a side wall of an aircraft body, a pair of flanges erected on the board, and rotatable about an axis substantially parallel to the sliding direction of the sliding door. a step body whose base end is pivotally attached to the flange; a spring which biases the tip of the step body to rotate in a direction closer to the substrate; and a spring which rotates around an axis perpendicular to the rotation axis of the step body. a rotating arm having an intermediate portion pivotally attached to the step body; A striker that can be abutted by the door, a stop pin attached to the other end of the rotating arm, and a flange of the pair of flanges on the rear side from the sliding door are formed to position the step body in a stored state and a used state. An aircraft kick-up step device comprising two positioning holes into which the locking pins penetrate.