JPH06171599A - Dropping device - Google Patents

Abstract

PURPOSE:To sharply reduce the generation of an impact force during landing on the water and landing by reliably decelerating a lowering speed right before landing on the water and landing, in the airdrop of by utilizing a parachute. CONSTITUTION:A rocket 6 having a jet nozzle 6a through which a jet is made to below is attached under a parachute 1. By receiving a signal from an altitude sensor 8 to detect that the parachute 1 is dropped to a given height as seen from a drop point, a rocket ignition device 7 is operated. By making the rocket 6 jet at a height position right before landing, a drop speed can be decelerated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, for example, allows a victim on the sea to drop a lifesaving kit containing a lifebuoy, food, etc. from an aircraft, or drop various amounts of material to a predetermined location on land. More specifically, the present invention relates to a quantity dropping device for dropping a quantity from an aircraft to the sea or land by using a parachute.

[0002]

2. Description of the Related Art Conventionally, when dropping various quantities from an aircraft onto the sea or on land, a quantity dropping device using a parachute has been used in order to soften the impact of landing on the quantity of water and landing. Well known. Most of the conventionally known quantity dropping devices control the opening altitude of a parachute (see, for example, JP-A-62-200200 or JP-A-62-194997) or a parachute. One that shortens the time required to open an umbrella (for example, Japanese Patent Laid-Open No.
176298), and in any case, the descent speed of the physical quantity is determined by the descent speed of the parachute itself, and the descent speed cannot be further reduced.

[0003]

As described above, in the conventionally known mass dropping devices, since the descending speed of the mass is uniquely determined by the descending speed of the parachute itself, the airflow velocity and the atmospheric pressure are reduced. It is possible that the descent speed of the parachute itself may change due to such factors as the impact of landing and landing cannot be sufficiently mitigated. In particular, the descent speed of the parachute is generally set to a relatively high value within a range that does not adversely affect the amount of dropped objects, in order to minimize the deviation of the descent point due to the air flow or the like. Therefore, there is a problem that the impact at the time of landing and landing is large, and the amount of dropped objects is easily damaged or damaged.

The present invention has been made in view of the above circumstances, and exhibits an excellent cushioning effect by reliably reducing the descending speed of the physical quantity immediately before landing / landing regardless of the descending speed of the parachute itself. It is an object of the present invention to provide a material dropping device that can be used.

[0005]

In order to achieve the above object, a material dropping device according to the present invention comprises a parachute, and a falling material quantity holding mechanism which is attached to a lower portion of the paratrooper and holds a quantity of material in a detachable manner. Attached to the lower part of the parachute,
A rocket having an injection port for injecting downward, a rocket igniter, and detecting that the parachute has reached a predetermined height from the point of fall, operate the rocket igniter to inject the rocket. And an altitude sensor for controlling the altitude.

As the altitude sensor in the above-mentioned quantity dropping device, a two-core conducting wire which is electrically connected to the rocket igniter and hangs down to a position lower than the amount of fallen objects, and a weight which keeps this conducting wire in a hanging state at all times And an electrode switch attached to the lower end of the above-mentioned conducting wire to close the ignition circuit by contacting the surface of the drop point.

Further, it is preferable to use, as the quantity holding mechanism in the above-mentioned quantity dropping device, one which is constructed so as to separate the quantity from the parachute by a reaction force when the quantity falls.

[0008]

According to the present invention, when dropped from an aircraft,
At first, the parachute will fall at the set descent speed. Then, when the parachute descends to a predetermined height as seen from the drop point, the rocket ignition device is activated by the detection signal from the altitude sensor to ignite the rocket. This rocket jet reduces the descent speed while
It will land and the shock will be significantly reduced.

In particular, as an altitude sensor for detecting that the altitude has been reached to a predetermined altitude, an electrode switch is attached to the lower end of the two-conductor wire that is electrically connected to the rocket ignition device and hangs down to a position below the quantity. When the attached sensor is used, the structure is simple and inexpensive, and the rocket is ejected by surely detecting the predetermined height, so the impact mitigation function is highly reliable.

In addition, when the quantity holding mechanism configured to separate the quantity from the parachute by the reaction force when the quantity falls, since the entanglement between the parachute and the quantity disappears, the quantity after landing and landing is reduced. Easy to handle.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the entire dropping device of a rescue kit for marine victims, which is an example of the amount dropping device of the present invention. This rescue kit dropping device is roughly classified into a parachute 1, a dropping device main body 3 that is rotatably connected to a lower portion of the parachute 1 through a pin 2, and a dropping device main body 3 that is attached to the lower portion of the dropping device. Rescue kit holding mechanism 5 for detachably holding the rescue kit 4, which is the physical quantity, and the main body 3
A rocket 6 attached to the rocket 6, a rocket ignition device 7, and an altitude sensor 8 for detecting that the parachute 1 has reached a predetermined altitude and activating the rocket ignition device 7 for ignition. There is.

FIG. 2 is an enlarged view of the main part of FIG. 1, in which the upper end of the main body 3 is pinned to a metal fitting 9 to which the lower ends of a plurality of strings 1a of the parachute 1 are assembled and fixed. Are connected. A plurality of rockets 6 are attached to the intermediate portion of the main body 3 at equal intervals in the circumferential direction.
Is directed obliquely downward, and the ignition part 6b of the rocket 6 and the rocket ignition device 7 installed at the center of the intermediate portion of the main body 3 are electrically connected by the ignition wire 10.

The rescue kit holding mechanism 5 is constructed as follows. That is, downward protrusions 3a are formed on both sides of the outer peripheral portion of the main body 3, and bell crank type hooks 11 are supported on the protrusions 3a via pins 12 so as to be vertically swingable. Has been done. On the outer end of the bell crank type hook 11, there is formed a locking claw 11a which can be engaged with and disengaged from a flange-shaped projection 4a formed on the upper end of the rescue kit 4, and the hook is formed. One end of an expandable body 14 incorporating a compression spring 13 is connected to the inner end of 11 via a pin 15. The other end of the elastic body 14 is connected to the main body 3 via a pin 16.
Are linked to. Further, in a state in which the locking claw 11a is engaged with the flange-shaped projection 4a of the rescue kit 4 downward from between the outer end of the hook 11 and the support portion of the pin 12, The contact portion 11 which is located with a slight gap α between the upper surface of the flange-shaped protrusion 4a and
c is projected.

The rescue kit holding mechanism 5 composed of the above-mentioned components is constructed by the reaction force of the rescue kit 4 when the rescue kit 4 comes into contact with the water.
By the upward displacement force F acting on the bell crank type hook 11 is oscillated upward as shown by the phantom line in FIG. 2 against the urging force of the compression spring 13 via the contact portion 11c.
As a result, the locking claw 11a is disengaged from the flange-shaped protrusion 4a of the rescue kit 4, and the rescue kit 4 is automatically separated from the parachute 1 and the main body 3.

The altitude sensor 8 is constructed as follows. That is, the two-core conducting wire 17 electrically connected to the rocket ignition device 7 is the rescue kit 4
Is suspended to a position below the lower end of the. 2 above
A rod-shaped or plate-shaped electrode 18 is connected to the lower end portion of the lead wire 17 of the core, and by the pair of electrodes 18, 18,
The electrode switch 19 is formed. Further, the electrode 18
A weight 20 having an appropriate weight is attached to the upper part of the wire to keep the lead wire 17 in a suspended state.

When the electrode switch 19 comes into contact with the sea surface at the drop point, the electrodes 18, 18 are electrically connected to each other through sea water, and are formed by the two-conductor wire 17 and a circuit in the rocket igniter 7. The ignition circuit is closed and the rocket ignition device 7 is ignited. In the altitude sensor 8 having such a configuration, the hanging length of the lead wire 17 is
The height at which the rocket 6 is ignited, that is, the height viewed from the falling point is set, and is appropriately set according to the mass and content of the rescue kit 4, the descent speed of the parachute 1, and the like.

Although not shown in detail in the drawings, the rescue kit 4 stores the transport main body 4A that can be floated above the sea and the propulsion device, and the propulsion device storage section for remotely deploying the propulsion device. 4B and remote control,
It comprises a lifesaving boat storage section 4C adapted to expand the lifesaving boat 21 stored inside thereof to the outside and rapidly expand it. In addition, food and the like may be stored.

Next, the operation of the rescue kit dropping device having the above structure will be described. First, as shown in FIG. 3, the rescue kit 4 from the aircraft 30 on the windward side of the marine victim A.
When the entire apparatus holding the parachute is dropped, the rescue kit 4 is hung below the parachute 1 and gradually descends at the set speed of the parachute 1 itself. Then, when it descends to near the sea level and reaches a predetermined altitude, and the electrode switch 19 in the altitude sensor 8 contacts the sea level, the ignition circuit is closed and the rocket ignition device 7 is ignited, and the ignition signal is the ignition line. It is transmitted to the ignition part 6b of the rocket 6 through 10 and the rocket 6 is ignited. The jetting of the rocket 6 slows down the descent speed, so that the entire device lands on the sea surface at a low speed, and the impact acting on the rescue kit 4 is sufficiently reduced.

At the time of landing, a reaction force acts on the rescue kit 4 from the sea surface, and an upward displacement force F acting on the rescue kit 4 in FIG. 2 in response to this reaction force causes a bell crank through the contact portion 11c. The shaped hook 11 is swung upward against the biasing force of the compression spring 13, as shown by the phantom line in FIG. As a result, the locking claw 11a of the rescue kit holding mechanism 5 separates from the flange-shaped projection 4a of the rescue kit 4, and the rescue kit 4 is automatically separated from the parachute 1 and the main body 3. At this time, the expandable body 1 incorporating the compression spring 13
4 is displaced to the opposite side with respect to the straight line connecting the centers of the pins 15 and 16 (over center), and the hook 11 is fixed as it is in the posture shown by a virtual line.

When the rescue kit 4 is separated from the parachute 1 and the main body 3, the rocket 6 is still in the operating state. Therefore, the load of the rescue kit 4 is released and the parachute 1 and the main body 3 are lightened. The rocket 6 is driven upward by the propulsive force of the rocket 6 and is separated far away. In this way, since the parachute 1 and the main body 3 and the rescue kit 4 are automatically separated at the same time as landing, the entanglement between the parachute 1 and the rescue kit 4 is prevented.

On the other hand, the rescue kit 4 thus separated is levitated above the sea by the carrier body 4A, and is operated by the remote control from the aircraft 30 to the distressed person A by the propulsion force of the propulsion unit 40 which is deployed outside from the propulsion unit storage section 4B. On the sea surface towards. When reaching the vicinity of the victim A, the lifeboat storage part 4C is separated by remote control from the aircraft 20, and the lifeboat 21 stored therein is extended to the outside.
And it is expanded rapidly.

In the above embodiment, the quantity was dropped on the sea, but the present invention can also be applied to drop the quantity on land. In that case, for example, as shown in the second embodiment of FIG.
An electrode switch 19 is configured by providing a fixed electrode 19a and a movable electrode 19b held by a spring member 22 at the lower part of the electrode. When the dropping device dropped from the aircraft 30 of FIG. 3 reaches a predetermined height when viewed from the ground of the drop point, the electrode switch 19 of FIG.
b is pressed by the fixed electrode 19a, the two are electrically connected, and the rocket ignition device 7 is ignited.

By using the structure as shown in each of the above-mentioned embodiments as the altitude sensor 8, the altitude sensor 8 is inexpensive, and the deceleration operation of the descending speed is ensured from a predetermined altitude. Alternatively, an altitude sensor utilizing ultrasonic waves or radio waves may be used.

Further, as the rescue kit holding mechanism 5, in the above-mentioned embodiment, the parachute 1 and the main body 3 and the rescue kit 4 are automatically separated at the same time as landing, but unlike this, for example, remote operation from an aircraft is performed. Alternatively, the two may be separated.

[0025]

As described above, according to the first or second aspect of the invention, when a certain amount of altitude is dropped by the parachute, the rocket is ignited by the detection signal from the altitude sensor, The rocket jet can softly land and land while reliably reducing the descent speed regardless of external conditions such as air velocity and atmospheric pressure. Therefore, it is possible to remarkably reduce the impact on the amount of the dropped object, to realize a highly safe drop of the object without damage or damage, and thus to expand the type of the dropped object amount.

According to the second aspect of the invention, it is possible to obtain a highly reliable system which detects the predetermined height and reliably ejects the rocket with a simple and inexpensive configuration.

Further, according to the third aspect of the present invention, since the quantity of the article is separated from the parachute by the reaction force when the quantity of the article falls, the parachute and the quantity of the article are not entangled with each other, and the quantity of the article after landing / landing is easy to handle.

[Brief description of drawings]

FIG. 1 is a side view showing the whole of a rescue kit dropping device for marine casualties according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a schematic diagram illustrating an actual dropping action state.

FIG. 4 is a side view showing an electrode switch according to a second embodiment of the present invention.

[Explanation of symbols]

1 ... Parachute, 3 ... Device main body, 4 ... Rescue kit (falling object amount), 5 ... Rescue kit holding mechanism (falling object amount holding mechanism),
6 ... rocket, 6a ... injection port, 7 ... rocket igniter,
8 ... Altitude sensor, 17 ... 2-conductor wire, 19 ... Electrode switch, 20 ... Weight.

Claims (3)

[Claims] 1. A parachute, a quantity holding mechanism that is attached to a lower part of the parachute to hold a quantity of objects in a detachable manner, and a rocket that is attached to a lower portion of the parachute and has an injection port that ejects downward. A quantity dropping device comprising a rocket igniter and an altitude sensor for detecting that the parachute has reached a predetermined height as viewed from a dropping point and igniting the rocket igniter to eject a rocket. 2. The two-core conductor wire in which the altitude sensor is electrically connected to the rocket ignition device and hangs down to a position lower than the quantity of material, a weight for always keeping the conductor wire in a suspended state, and the lead wire. 2. The quantity dropping device according to claim 1, further comprising: an electrode switch attached to a lower end portion of the vehicle and actuating the rocket ignition device by contact with a dropping point. 3. The quantity dropping device according to claim 1, wherein the quantity holding mechanism is configured to separate the quantity from the parachute by a reaction force when the quantity is dropped.