JPH07329892A - Parachute - Google Patents

Abstract

PURPOSE:To certainly prevent unexpected damage to be done as a parachute is carried away by wind and a water current after it alights on the water by providing a cutting part made of a water soluble fiber on the side of a dropping article of a robecord to connect a main parachute and the dropping article. CONSTITUTION:Upper end parts of a plural number of robe-cords 19 are fastened on a marginal part of a main parachute 15 and a plural number of the robe-cords 19 are converged into two pieces of robe-cords 23 on the side of a flare main body 21 on a parachute 17. These robe-cords 23 are formed of nylon made belt ropes 25 as a whole, but cutting parts 27 made of a water soluble fiber are provided at proper positions on these robe-cords 23. Each of these cutting parts 27 is structured to connect the belt rope 25 with four pieces of water soluble tapes made of water soluble vinylon, for example, and four pieces of the water soluble tapes 29 are respectively inserted into four insertion holes 33 provided on plate spacers 31 to separate themselves so as not to connect themselves with each other at the time when they are swollen in the water. Consequently, it is possible to precisely release the main parachute 15 at the time of alighting on the sea, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved parachute for dropping a fallen object.

[0002]

2. Description of the Related Art Parachutes are widely used to drop fallen objects from aircraft, but after landing on oceans, lakes and rivers, the parachutes are reopened by the wind and water currents, and are caught in fishing nets and reefs. It may cause a disaster such as rolling or getting entangled in the screw of a ship. Therefore, it is desirable that the parachute does not reopen after completing its function as a parachute.

Therefore, conventionally, in some parachutes,
Mechanical that releases the swelling of the parachute at the same time as landing,
In the case of a pyrotechnic product such as a parachute flare equipped with an electrical disconnection mechanism, the parachute hanging string is cut with an explosive bolt in the air at the same time as the burning of the photochemicals as described below. The method of is adopted.

FIG. 10 shows the descent state of the parachute flare. When the parachute flare 1 is dropped from an aircraft in the search and rescue of a marine accident, the flare body 1a is slowly lowered by the parachute 3 and burned, At this time, as shown in FIG. 11, the photochemicals 5 in the flare body 1a are sequentially burned from below.

The flare body 1a has two explosive bolts 7 and 9 mounted on the upper portion thereof, to which a suspension cord 11 of a parachute 3 is connected, and one explosive bolt 7 is charged with explosive powder 13. Then, as shown in FIG. 12, when the burning surface of the photosensitizer 5 reaches the explosive bolt 7, the explosive bolt 13 is transmitted to the explosive bolt 7 and the explosive bolt 7 is destroyed. As shown in FIG. 13, the parachute 3 loses its support, the main umbrella 3a becomes a curled-up shape, and the parachute flare 1 is dropped.

[0006]

Thus, as a result of the suspension cord 11 on one side being cut in this manner, the parachute 3 will not be swept away by the wind or water flow after the parachute 3 has landed. Since the explosion bolt 7 operates in the air, if one of the hanging strings 11 is cut during the descent, the parachute 3 drops at a high speed together with the flare body 1a, which is very dangerous.

On the other hand, when a mechanical and electrical disconnection mechanism for releasing the expansion of the parachute is attached, it cannot be said that the parachute operates reliably after it is completely lowered. There is a problem in terms of reliability that the separation mechanism may operate due to a factor during the descent, and that the more complicated the structure of the separation mechanism, the lower the probability of normal operation.

The present invention has been devised in view of the above circumstances, and has a simple structure, which can surely prevent an unexpected accident from being caused by the wind or water flow after landing on water. It is an object of the present invention to provide a parachute in which there is no fear of a falling object falling at a high speed as when an explosive bolt is used.

[0009]

In order to achieve such an object, the parachute according to claim 1 is provided with a cut portion made of a water-soluble fiber on a falling object side of a hanging string that connects the main umbrella and the falling object. It is a thing.

The parachute according to claim 2 is
The cutting portion is composed of a plurality of water-soluble tapes, and the parachute according to claim 3 is characterized in that the water-soluble tape according to claim 2 is locally narrowed.

Further, in the parachute according to a fourth aspect, the cutting portion is composed of two plates connected to a hanging string and one water-soluble string alternately bridged between the plates. According to a fifth aspect of the present invention, the parachute has a cutting portion composed of two rings connected to a hanging string and a single water-soluble string bridged between the rings.

The parachute according to claim 6 is
The parachute according to claim 1 is characterized in that the cutting portion is composed of a net bag made of a water-soluble thread, and a spherical spacer is housed in the net bag.

[0013]

According to the first aspect of the present invention, when the parachute is landed on the ocean or lake together with the fallout, the water-soluble fibers forming the cutting portion are gradually dissolved, and the movement of the fallout due to the flow of water still occurs. Since the shearing force acts on the water-soluble fiber, the hanging string connecting the main umbrella and the fallen object is cut at the cutting portion.

Also, according to the inventions according to claims 1 and 2, when the parachute lands on the ocean, lakes and marshes, a plurality of water-soluble tapes constituting the cutting portion are dissolved, and the fallout due to the water flow is caused. The shearing force acts on the water-soluble tape by the movement of, so that the hanging string connecting the main umbrella and the fallen object is cut at the cutting portion.

Further, in the inventions according to claims 1 to 3, when the parachute lands on the ocean or lake, the water-soluble tape is different between the squeezed part and the other part. The water-soluble tape is cut at the boundary because it dissolves at a speed and the shearing force acts on the boundary at the movement of the fallout due to the water flow.

Similarly, in the inventions according to claims 1 and 4, the inventions according to claims 1 and 5, and also the inventions according to claims 1 and 6, the parachute descends. When the water and the marshes come into contact with the object, the water-soluble strings and net bags that make up the cutting part dissolve, and the movement of the fallout due to the water flow causes shearing forces to act on the strings and net bags. The hanging string that connects the umbrella and the fallen object will be cut at the cutting part.

[0017]

Embodiments of the present invention applied to a parachute flare will be described below in detail with reference to the drawings.

FIG. 1 is an overall perspective view of a parachute flare using a first embodiment of a parachute according to claims 1 to 3, wherein 15 is a main umbrella of a parachute 17 and 19 is a main umbrella. With a plurality of hanging strings connected to the umbrella 15,
The main umbrella 15 and the hanging string 19 are made of nylon.

As with the conventional parachute, a plurality of hanging strings 19 are provided on the flare body 21 side, and two hanging strings 23 are provided.
However, as shown in FIG. 2, one of the suspension cords 23 is formed of a nylon belt rope 25.
Then, a cut portion 27 made of a water-soluble fiber is formed on the belt rope 25.

The cutting portion 27 has a structure in which the belt rope 25 is connected by four water-soluble tapes 29 made of water-soluble vinylon. This water-soluble vinylon is made of polyvinyl alcohol as a raw material and usually polyvinyl alcohol fiber is used. By formalin treatment, insoluble and heat-resistant vinylon is formed. And as a water-soluble vinylon of this kind on the market, the product "Solvlon" of Katakura Industries Co., Ltd. is known.

This solvulon has the property of being dissolved and dispersed in water through the steps of swelling → shrinkage → dissolution → dispersion. The water-soluble tape 29 in the present embodiment opens the solvulon. It is formed by processing into four thin strip-shaped tapes with the strength to withstand the impact and load of an umbrella.

As shown in FIG. 2, the four water-soluble tapes 29 have four insertion holes 3 formed in the plate-shaped spacer 31 so as not to be bonded to each other when swollen in water.
3 has a structure in which each water-soluble tape 29 is separated from each other by inserting the water-soluble tape 29 into the insertion hole 33, and thus the insertion portion of each water-soluble tape 29 is locally narrowed. Has become. The plate-shaped spacer 31
The material may be plastic, paper, metal, or the like.

Since the parachute flare 34 using the parachute 17 according to the present embodiment is constructed in this manner, when the parachute flare 34 reaches the ocean, lakes, or rivers, the insertion hole 33 of the water-soluble tape 29 is used. The part narrowed down by inserting into it cannot be swollen even if it contains water, but the other parts are gradually swollen → contracted → dissolved → dispersed.

Each time the heavy flare body 21 moves by the water flow, the shearing force acts on the boundary between the swollen portion and the non-swelled portion of the water-soluble tape 29, so that the water-soluble tape 29 is dissolved and dispersed and cut. As a result, the belt rope 25 is cut at the cutting section 27.

Therefore, according to this embodiment, after landing, the main umbrella 15 of the parachute 17 is not opened and washed again even if it is affected by wind or water flow, so that the parachute 17 is entangled in the fishing net or the reef. The flare body 21 that has fallen together with the parachute 17 can be settled in a place not far from the original dropping place by partly disconnecting the hanging cord 23, so that quick recovery afterwards is possible. It is possible.

Of course, according to this embodiment, the parachute 1
After the flare body 21 is completely submerged together with 7, the one hanging string 23 (belt rope 25) is cut, so that the parachute 17 drops in the air at a high speed together with the flare body 21 as in the conventional example using an explosion bolt. There is no danger and the flare body 2 is not affected by external factors such as gusts and radio waves.
As long as 1 is submerged in water, the hanging string 23 is reliably cut, and
It has advantages such as a simpler structure than the conventional one.

FIG. 3 shows a second embodiment of the parachute according to the first to third embodiments. In the first embodiment, each water-soluble tape 29 constituting the cutting portion 27 is provided with a plate-like spacer 31. Each water-soluble tape 2 that is inserted into the insertion hole 33 of
9 has a structure in which they are separated from each other and these are locally narrowed down. However, in this embodiment, instead of the plate-like spacers 31, the substantially central portions of the water-soluble tapes 29 are respectively formed of plastic or metal and have a small diameter. The water-soluble tapes 29 are separated from each other by being inserted into the tube 35, and the cutting portions 37 are formed in the belt rope 25 by locally squeezing them.

Thus, also in this embodiment, when the parachute flare lands on the ocean or lake, the water-soluble tape 29
Except for the portion narrowed down by the tube 33, the swelling-contraction-dissolving-dissolving-dispersing process including water proceeds, and the shearing force is applied to the water-soluble tape 29 each time the heavy flare body moves by the water flow.
Since it acts on the boundary between the swollen portion and the non-swollen portion, the water-soluble tape 29 is gradually dissolved and dispersed and cut, and as a result, the belt rope 25 is cut at the cutting portion 37.

Therefore, according to the present embodiment, after landing, the parachute does not reopen and flow even if it is affected by wind or water flow. There is no risk of being entangled in the ship or entangled with the ship's screw.

Also, according to this embodiment, the parachute and the flare main body are completely submerged, and then one of the hanging straps 23 is used.
Since the (belt rope 25) is cut, there is no danger that the parachute will drop at high speed in the air with the flare body as in the conventional example using an explosion bolt, and the flare will not be affected by external factors such as gusts or radio waves. As long as the main body is submerged in water, the hanging string 23 is reliably cut, and the structure is simpler than in the past.

FIG. 4 shows an embodiment of the invention according to claim 1 and claim 2. Since the configuration excluding the invented portion is the same as that of the embodiment shown in FIG. 1, the same components are designated by the same reference numerals and their description is omitted.

In the figure, 39 is a rectangular block formed of metal or resin, and the block 39 has a soluble tape 29.
Four slits 41 having a width m slightly larger than that are formed in parallel. Then, in the present embodiment, the four water-soluble tapes 29 that connect the belt ropes 25 are inserted into the slits 41 and are separated from each other, so that the cutting portion 43 is provided in the middle of the belt ropes 25. Characterize.

Thus, also in this embodiment, when the parachute flare lands on the ocean, lakes, or rivers, the water-containing water-soluble tape 29 swells in many other parts as compared with the part inserted into the slit 41. Since the shearing force acts on the water-soluble tape 29 each time the heavy flare body moves in the water stream, the water-soluble tape 29 is gradually dissolved and dispersed and cut, and as a result, the belt rope 25 is cut at the cutting portion 43. Will be disconnected in.

Therefore, according to the present embodiment, the parachute does not reopen and flow even after being affected by wind or water flow after landing, so that the intended purpose can be achieved as in the above embodiments. In addition, there is no risk that the flare body will drop at high speed due to the cutting portion 43 being cut in the air.

FIG. 5 is an overall perspective view of a parachute flare using an embodiment of the parachute according to claims 1 and 4, and in FIG. 5, 45 is the main umbrella of the parachute 47 and 49 is the main umbrella. With a plurality of hanging cords connected to 45, similar to the above-mentioned main umbrella 15 and hanging string 19, these main umbrellas 45
The hanging string 49 is also made of nylon.

On the flare body 21 side, a plurality of hanging strings 49 are converged on two nylon hanging strings 51, and one hanging string 51 has a cutting portion 53 made of a water-soluble fiber.
Is provided.

FIG. 6 shows an enlarged view of the cutting section 53. In the figure,
55 and 57 are triangular metal plates that are connected to each other in the middle of the hanging string 51 with a certain space therebetween.
In the 57, a plurality of insertion holes 59 are formed in a row along the opposing sides 55a and 57a, respectively. Then, one water-soluble cord 61 made of sorbulon is alternately laid between the plates 55 and 57 through the respective insertion holes 59 at intervals such that they do not bond to each other at the time of swelling.
When part of the string 61 is dissolved and dispersed in water and cut, the string 6
1 is separated and both plates 55 and 57 are separated.

Since the parachute flare 62 using the parachute 47 according to the present embodiment is constructed in this way, when the parachute flare 62 lands on the ocean or lake, the water-soluble string 61 swells with water. → Shrink → Dissolve → Disperse.

Each time the heavy flare body 21 moves in the water stream, a shearing force acts on the string 61, so that the string 61 is gradually dissolved and dispersed, and as a result, one suspension string 51 is similarly cut. It will be cut at the portion 53.

Therefore, also according to this embodiment, since the main umbrella 45 of the parachute 47 is not opened and washed away by the influence of wind and water flow, the parachute 47 is entangled in fishing nets and reefs or screwed into a ship. Since the flare main body 21 that has fallen together with the parachute 47 does not get entangled and is settled to a place not far from the original dropping place by partially separating the hanging string 51, it is possible to promptly collect it.

Furthermore, according to this embodiment, since the flare main body 21 together with the parachute 47 is completely submerged in water, the one hanging string 51 is cut at the cutting portion 53, so that the parachute as in the conventional example using the explosion bolt. There is no risk that 47 together with the flare body 21 will drop in the air at high speed, and the flare body 21 will not be affected by external factors such as gusts or radio waves.
As long as it is submerged in water, the hanging string 51 is surely cut, and the structure is simpler than the conventional structure.

FIG. 7 shows an embodiment of the parachute according to claims 1 and 5, and this embodiment is the cutting portion 53 of FIG.
Instead of connecting the metal rings 63 and 65 in the middle of the hanging string 51, a string 67 made of one solvulon is annularly laid between the rings 63 and 65, and is attached on one hanging string 51. The cutting portion 69 is provided.

FIG. 8 shows an embodiment of the parachute according to claims 1 and 6, and in this embodiment, instead of the cutting portion 53 of FIG. 6, a thread made of sorblon in the middle of one hanging string 51. The net bag 71 knitted with 71a is attached, and the hollow spherical spacer 73 is housed in the net bag 71 to store the cutting portion 7
5, the spacer 73 has a function of preventing the yarns 71a from being joined to each other and increasing their dissolution and dispersion when the yarns 71a forming the net bag 71 swell with water.

Thus, also in these embodiments, the intended purpose can be achieved as in the above-mentioned embodiments. Further, for example, in the embodiment shown in FIG. 5, one of the two nylon hanging straps 51 on which a plurality of hanging straps 49 converge is provided with a cutting portion 53 made of a water-soluble fiber in the middle thereof. As shown in FIG. 9, one suspension string 51 ′ may be entirely formed of solvulon with a strength to withstand the impact and load when the umbrella is opened, and this may be used as the cutting portion 77. It is possible to obtain the same effect as each of the above-mentioned embodiments.

In each of the above examples, the present invention is applied to a parachute flare, but it goes without saying that the present invention is not limited to the parachute of the parachute flare, and the water-soluble fiber is also used. Is not limited to solvulon.

[0046]

As described above, according to the invention described in each claim, after landing, the parachute does not open and flow again even under the influence of wind or water flow. There is no risk of getting entangled in fishing boats or fishing reefs or entangled in the ship's screw, and the fallen object that falls with the parachute settles in a place not far from the original drop location due to the partial disconnection of the hanging straps. Is possible.

According to the present invention, however, the parachute is cut together with the flare body as in the conventional parachute flare using the explosive bolt because the hanging string is cut off after the fallout is completely submerged in the parachute. There is no danger of dropping in the air at high speed, and as long as the parachute is in contact with water without being affected by external factors such as gusts or radio waves, the suspension cord will be cut reliably, and the structure is simpler than before. And so on.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing a descent state of a parachute flare using a parachute according to a first embodiment of claims 1 to 3.

FIG. 2 is an enlarged perspective view of a cutting portion of the parachute shown in FIG.

FIG. 3 is an enlarged perspective view of a cutting portion in a second embodiment of the parachute according to claims 1 to 3.

FIG. 4 is an enlarged perspective view of a cutting portion in an embodiment of the parachute according to claims 1 and 2.

FIG. 5 is an overall perspective view showing a lowered state of a parachute flare using an embodiment of the parachute according to claim 1 and claim 4;

6 is an enlarged perspective view of a cutting portion of the parachute shown in FIG.

FIG. 7 is an enlarged perspective view of a cutting portion in an embodiment of the parachute according to claims 1 and 5.

FIG. 8 is an enlarged perspective view of a cutting part in an embodiment of the parachute according to claim 1 and claim 6;

FIG. 9 is an enlarged perspective view of an essential part of an embodiment of the parachute according to claim 1;

FIG. 10 is an overall perspective view showing a lowered state of a conventional parachute flare.

FIG. 11 is a cross-sectional view of a main part of the flare body showing a burning state of photochemicals.

FIG. 12 is a cross-sectional view of the flare body showing a state in which the hanging string is cut by the explosion bolt.

FIG. 13 is a perspective view showing a falling state of a parachute flare with one of the hanging cords cut.

[Explanation of symbols]

 15,45 Main umbrella 17,47 Parachute 19,23,49,51,51 'Hanging string 21 Flare body 25 Belt rope 27,37,43,53,69,75,77 Cutting part 29 Water-soluble tape 31 Plate spacer 33,59 Insertion hole 34,62 Parachute flare 35 Tube 39 Block 41 Slit 55,57 Plate 61,67 String 63,65 Ring 71 Net bag 73 Spacer

Claims (6)

[Claims] 1. A parachute characterized in that a cutting portion made of a water-soluble fiber is provided on the falling object side of a hanging string that connects the main umbrella and the falling object. 2. The parachute according to claim 1, wherein the cutting portion is composed of a plurality of water-soluble tapes. 3. The parachute according to claim 2, wherein the water-soluble tape is locally narrowed. 4. The cutting portion comprises two plates connected to a hanging string and one water-soluble string alternately bridged between the plates. parachute. 5. The parachute according to claim 1, wherein the cutting portion is composed of two rings connected to the hanging string and one water-soluble string bridged between the two rings. 6. The parachute according to claim 1, wherein the cutting portion is a net bag made of a water-soluble thread, and a spherical spacer is housed in the net bag.