JPH047945B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a launcher, and particularly to an aircraft fuselage,
Alternatively, the present invention relates to a launcher used in an impact test in which a projectile object such as a steel ball collides with a windshield.

[Prior Art and its Problems] Various objects such as birds, hailstones, and stones collide with the fuselage or windshield of an aircraft during flight. Therefore, when designing an aircraft body, it is required that these objects have sufficient strength to withstand collisions with the aircraft. For this reason, a shock resistance test is performed in which a projectile object, such as a chicken or a steel ball, is launched from a launcher at a predetermined speed using the pressure of a pressurized gas such as air, and collides with the fuselage of an aircraft.

A conventional launcher of this type will be explained with reference to FIGS. 7 and 8. In FIG. 7, reference numeral 51 indicates an air storage tank. Pressurized gas, such as air, is supplied to this air storage tank 51 through a valve 52, and the gas pressure in the air storage tank 51 is maintained at a predetermined value. ing. A gun barrel 53 extends from one side wall of the air storage tank 51, and a straight barrel inner hole 54 is provided in the gun barrel 53.
A barrel inner hole 5 is bored at the base of the barrel 53.
A rotary valve 55 that can close 4 is attached. This rotary valve 55 has a communication passage 56
By rotating the valve body 90 degrees from the illustrated position, the air storage tank 51 and the barrel inner hole 54 can be communicated with each other. However, the projectile object 57
is the barrel inner hole 54 in front of the rotary valve 55
The rotary valve 55 is rotated 90 degrees to accelerate the gun inside the barrel bore 54 using the gas pressure in the air storage tank 51, and the gun is fired from the muzzle. However, in the rotary valve 55 used in the above-mentioned device, the gas in the air storage tank 51 begins to leak through the communication passage 56 at the initial stage of switching from the fully closed position to the fully open position. The body 57 is a rotary valve 55
Before the gun reaches the fully open position and is subjected to sufficient pressure, the inside of the barrel inner hole 54 runs toward the muzzle. As a result, in order to give the projectile 57 the desired final velocity, either the barrel 53 must be lengthened to provide a greater run-up distance, or the pressure within the reservoir 51 must be increased. However, when using the former method, the barrel inner hole 54 becomes long, making processing difficult and increasing the size of the device, while when using the latter method, it must be designed to withstand the high pressure inside the air storage tank 51. This also poses a safety problem. Furthermore, the final velocity of the projectile 57 when it leaves the muzzle varies depending on the amount of gas leaking through the communication passage 56, resulting in the problem that accurate impact tests cannot be performed. Therefore, in order to prevent the projectile object 57 from moving before a sufficient pressure is established when the rotary valve 55 is switched in the opening direction, the projectile object 57 is conventionally moved to a certain level within the barrel bore 54. A device (not shown) is provided to hold it in position. In this device, a shear pin is installed just in front of the projectile object 57, and when the pressure of the gas leaking through the communication path 56 reaches a predetermined value, the shear pin is sheared and holds the projectile object 57. It works to release. However, in reality, the pressure for shearing the shear pin must be set slightly lower than the pressure in the air storage tank 51, so the projectile 57 may move slightly due to the low pressure after shearing the shear pin. As a result, the firing speed still fluctuates, and the shear pin must be replaced every time it is fired, which requires extra work.

In place of the shear pin, there is also one that applies a moderate amount of frictional resistance when the projectile object 57 is loaded. However, in this example, the gas pressure that overcomes this frictional force must also be set lower than the pressure in the air storage tank 51, and at this low pressure the projectile 57 moves within the barrel inner hole 54 toward the muzzle. I will do it. In addition, as another holding device, when the rotary valve 55 is fully opened, the projectile object 57
A device has been proposed that allows the holding device to be released. However, such devices are complicated and have problems in terms of economy and reliability.

On the other hand, as shown in FIG. 8, there is also a firing device that uses a diaphragm 58 instead of the rotary valve 55. In this device, a projectile object 57 is loaded into the barrel inner hole 54 from the muzzle side, and an impact is applied to the diaphragm 58 from the outside to break it.
It is designed to fire using the gas pressure inside. In this type of device, compared to the device using the rotary valve 55, the maximum pressure in the air storage tank 51 can be instantaneously applied to the projectile object 57, and the problem is that the projectile object 57 moves. will not occur. However, the diaphragm 58 has to be replaced every time it is fired, which requires extra effort and is not economical. Further, the diaphragm 58 is normally connected to the air storage tank 51.
In addition to being able to withstand internal pressure, it must also be able to rupture instantaneously and over the entire surface when an external impact is applied, which creates difficulties in selecting film thickness, material, and how to inflict initial damage. Become.

In addition, the rupture state of the diaphragm 58 is not always constant, and this variation affects the speed of impact on the projectile 57, making it impossible to perform an accurate impact test. To change the speed, the air storage tank 51
This can be done by changing the pressure inside. However, in the device using the diaphragm 58, the film thickness changes every time the pressure is changed.
It is necessary to change the material, etc., and this work is difficult.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems of the conventional launcher, to prevent the gas in the pressure tank from leaking until the projectile is about to be launched, and to provide an instantaneous system for preventing the gas from leaking out until the target is about to be launched. It is an object of the present invention to provide a firing device having a simple mechanism that can utilize the highest pressure in a pressure tank.

[Summary of the invention]

In order to achieve the above object, the present invention connects a gun barrel with a straight barrel inner hole to one side wall of an air storage tank in which high-pressure gas is stored, and forms a magazine section in this joint. In this firing device incorporating a valve body that selectively communicates between the air storage chamber and the barrel inner hole; It is characterized by incorporating a valve body whose passage can be selectively aligned with the inner bore of the gun barrel, and further providing a loading port in the communication passage of the valve body in the magazine section, through which a projectile can be loaded from the outside. The projectile loaded into the communication passage provided in the valve body will not be fired until the axes of the inner hole of the gun barrel and the communication passage coincide, and only when they coincide will be restrained. It will be melted and fired.

[Embodiments of the invention]

An embodiment of the launcher according to the present invention will be described below with reference to FIGS. 1 to 6.

In FIG. 1, reference numeral 1 indicates an air storage tank, and pressurized gas such as compressed air is supplied to this air storage tank 1 through a valve 2, and the inside of the air storage tank 1 is maintained at a predetermined pressure. It's becoming like that. A gun barrel 4 is connected to a part of the air storage tank 1, and a magazine section 3 is provided at the base of the gun barrel 4. A straight barrel inner hole 5 is bored in the gun barrel 4, and this barrel inner hole 5 passes through the interior of the magazine section 3 and opens into the air storage tank 1. A rotary cylinder 6 that can rotate clockwise or counterclockwise is installed in the magazine section 3, and this rotary cylinder 6
has a communication passage 7 having the same diameter as the inner diameter of the barrel inner hole 5, and is mounted so that the barrel inner holes 5, 5 can be closed. Thus, by rotating the rotating cylinder 6, the barrel inner hole 5 and the communication path 7 are connected.
These are aligned and communicated. Further, a loading port 8 having the same diameter as the inner diameter of the communication passage 7 is bored in the upper part of the magazine section 3,
As shown in FIG. 2, when loading the projectile 9, the rotary cylinder 6 is rotated to align the communication path 7 and the loading port 8, and the projectile 9 is pushed into the communication path 7. be able to. To fire the projectile 9, the rotary cylinder 6 is rotated 90 degrees from the state shown in FIG. The gas pressure in the gas tank 1 is instantaneously applied to the projectile object 9.

In the launcher shown in this embodiment, the third
As shown in the figure, until the barrel inner hole 5 and the communication passage 7 are completely communicated with each other due to the rotation of the rotating cylinder 6, the projectile 9 is not subjected to the pressure in the air storage tank 1. is also held in the communication path 7 without being ejected. Therefore, the projectile 9 does not run up inside the barrel inner hole 5 due to leakage of gas in the air storage tank 1, and the center line between the barrel inner hole 5 and the communicating path 7 is in a straight line. At this time, the pressure within the air storage tank 1 acts instantaneously, giving the projectile 9 a stable velocity.

The shape of the projectile object 9 is not only spherical as shown in FIGS. 1 to 3, but also as shown in FIG.
A cylindrical shape as shown in FIG. 5 can also be used, and in either case, the outer diameter is slightly smaller than the inner diameter of the barrel inner hole 5. The projectile object 9 shown in FIG. 5 is generally called a sabot, and there is a recess 10 inside the sabot.
A chicken or other bird can be put into this recess 10, loaded into the communication passage 7, and fired.
The sabot may be shaped like a metal tea caddy or made of styrofoam.

Next, another embodiment of the launching device according to the present invention will be described in the sixth embodiment.
This will be explained with reference to the figures. Reference numeral 11 in Fig. 6
indicates an air storage tank. A gun barrel 12 extends from the air storage tank 11, and a barrel inner hole 13 is bored inside the gun barrel 12. One end of this barrel inner hole 13 is placed outside and the other end is placed inside the pressure tank 11. It's open.
In this embodiment, the valve body is configured as a plunger 14, which is mounted so as to be able to slide vertically and to freely close the bore 13 of the gun barrel. A communication passage 15 that can be aligned with the hole 13 is bored. The inner diameter of this communication passage 15 is the same as that of the barrel inner hole 13.
The diameter is set to be the same as the inner diameter of the At the position where the plunger 14 is mounted, the gun barrel 12
A magazine section 16 is bored in the lower side, and a receiving hole 17 for accommodating the plunger 14 is provided in the magazine section 16.
is drilled. Further, in the position where the plunger 14 is completely installed in the receiving hole 17, this magazine section 16 has a loading port which is aligned with the communication path 15 and communicates with the outside, and is opened for loading the projectile 18. 19 are drilled. In order to load the projectile 18, the plunger 14 is pushed down to the lower position and pushed into the communication passage 15 through the loading port 19. During firing, the plunger 14
When the barrel inner holes 13, 13 and the communicating passage 15 are brought into alignment with each other, the projectile 18 is instantaneously subjected to the pressure within the air storage tank 11 and is fired toward the muzzle. Before the barrel inner hole 13 and the communication path 15 are aligned, the projectile object 18 is held by the upper end of the inner wall of the receiving hole 17 and cannot be fired, as shown in FIG. Retained.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the projectile is held in the communicating hole formed in the valve body which is attached to the barrel inner hole so that it can be freely closed until the time of firing. There is no longer a distance for the projectile to run up through the hole, and the maximum pressure in the air reservoir acts on the projectile momentarily during firing, so even if the run-up distance is short, the firing speed remains stable. The barrel length can be shortened. Further, since the valve body itself incorporated in the magazine section serves as a holding device for the projectile, an extra holding device is not required, and the structure is simple and highly reliable. Furthermore, in the impact test, even if the velocity applied to the projectile is varied, this can be easily done by varying the pressure in the pressure tank.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the firing device according to the present invention, FIG. 2 is a sectional view showing the rotational position of the rotating cylinder when loading a projectile, and FIG. 4 is a side view showing the shape of the projectile object, FIG. 5 is a vertical sectional view showing another example of the projectile object, and FIG. 6 is a launcher according to the present invention. FIG. 7 is a cross-sectional view showing an example of a conventional firing device, and FIG. 8 is a cross-sectional view showing another example of a conventional firing device. 1... Air storage tank, 3... Magazine section, 4... Gun barrel, 5... Gun barrel inner hole, 6... Rotating cylinder (valve body), 7... Communication path,
8... Loading port, 9... Projectile object, 14... Plunger (valve body), 55... Rotary valve, 58... Diaphragm.

Claims (1)

[Claims] 1. A gun barrel having a straight barrel inner hole is connected to one side wall of an air storage tank in which high-pressure gas is stored, a magazine is formed at this joint, and the magazine is stored in the magazine. In a firing device incorporating a valve body that selectively communicates between the air chamber and the barrel inner hole; the magazine section is provided with a communicating passage having the same diameter as the barrel inner bore, and the communicating passage is connected to the gun barrel inner hole. What is claimed is: 1. A firing device comprising: a valve body that can be selectively aligned with the valve body; and a loading port in a communication path of the valve body in which a projectile can be loaded from the outside. 2. The valve body is configured as a rotating cylinder rotatably incorporated in the magazine, and the rotating cylinder is configured to be able to rotate around an axis perpendicular to the bore axis of the barrel inner hole. A firing device according to claim 1. 3. The firing device according to claim 1, wherein the valve body is configured as a plunger movable in a direction perpendicular to the bore axis of the barrel inner hole.