JPS6364719B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nozzle closure for a rocket, and more particularly to a nozzle closure for a rocket.

Hereinafter, taking a projectile rocket as an example, the structure around the nozzle closure attachment part will be explained based on the drawings. FIG. 1 mainly shows the rear part of a bullet assembly 1 in the rocket, and this bullet assembly 1 has a rocket motor 2, and a cartridge 3 at the rear end of the rocket motor 2. The medicine cartridge 3 has an outer cylinder part 4 and an inner cylinder part 5 coaxial with the outer cylinder part 4.
and a gap 6 formed between the outer cylinder part 4 and the inner cylinder part 5, and a front chamber 8 is formed inside the inner cylinder part 5 by a partition wall 7.
It is divided into a rear chamber 9 and a rear chamber 9. A percussion cap 10 and a propellant 11 are pressurized into the rear end of the cartridge 3. Reference numerals 12 and 13 indicate through holes formed in the inner cylindrical portion 5. The through hole 12 communicates between the front chamber 8 and the cavity 6, and the through hole 13 communicates between the rear chamber 9 and the cavity 6.
An annular notch 14 is formed on the outer periphery of the front end of the inner cylindrical portion 5. The rocket motor 2 has a case 15 in which an internal and external combustion type propellant 16 is loaded. The front end of the inner cylindrical portion 5 is screwed onto the outer periphery of the rear end of the case 15 . Reference numeral 17 denotes a cylindrical guide surrounding the rear end of the case 15. This guide 17 and the case 15 are connected by a flare 18, and the guide 1
The rear end of 7 is fitted into the front end of the outer cylinder part 4. 1
Reference numeral 5a denotes a nozzle holder that forms the rear end wall of the case 15, and this nozzle holder 15a is provided with an igniter 21 with a time extension tube and three nozzles 19. Note that the nozzles are evenly spaced at 120° intervals, but are shown as cross sections in the figure.

Nozzle closures 20 as shown in FIG. 1 are attached to the nozzle 19, and these nozzle closures 20 close the nozzle 19. Such a bullet assembly 1 is used as described below. That is, first, after inserting such a bullet assembly 1 into a gun (not shown), when the shooter fires the percussion cap 10 to ignite the propellant 11, the combustion gas flows into the rear chamber 9, through hole 13, It fills the front chamber 8 through the gap 6 and the through hole 12, presses the rocket motor 2 forward, and ignites the time delay charge 21a inside the time delay tube igniter 21. At the same time, the inner cylindrical portion 5 opens the notch 14 due to the above-mentioned pressing force.
The rocket is fired from the gun.
On the other hand, the time delay medicine 21a, the output medicine 21b, and the auxiliary medicine 21
c, the main charge 21d, and when the extended time has elapsed and the rocket has left the gun a little,
The propellant 16 is the main charge 21d of the igniter with extension tube 21
The bullet is ignited, and the bullet jets out the combustion gas of the propellant 16 from the nozzle 19 and flies. The nozzle closure 20 is blown backward by the pressure of this combustion gas. Therefore, measures must be taken to prevent the nozzle closure 20 from hitting personnel near the gun.

This invention was made by paying attention to the above-mentioned situation, and was developed to improve the nozzle closure of a rocket.
The apparatus includes a lid that closes the nozzle opening, a mounting part for attaching to the rocket motor, and a connecting part that connects the lid and the mounting part, and the lid separated from the nozzle opening remains on the rocket motor. The aim is to solve this problem in this way.

The present invention will be explained below based on the drawings.

Figures 2, 3 and 4 are views showing the nozzle closure of the rocket of the present invention. Since this nozzle closure is provided in the above-described projectile type rocket, the same components of the rocket will be designated by the same reference numerals, and a full view of the rear part of the rocket and its explanation will be omitted. The nozzle closure 25 has a lid part 26, an aluminum piece 26a embedded in the lid part, a mounting part 27, and a connecting part 28 that connects these parts. In FIG. 2, the lid part 2
6 is fitted into the end of the opening 19a of the nozzle 19, and the nozzle 19 is closed by the lid 26. The attachment part 27 is made in an annular shape and is fixed to the outer periphery of the nozzle 19, and the attachment part 27 and the lid part 2
6 is connected by a connecting portion 28. The nozzle closure in this example is made of elastic resin or the like as a whole in the shape shown in FIG. It is energizing.

Next, the action will be explained.

As described above, the bullet is fired and propellant 1
6 is ignited, the pressure of the combustion gas blows off the lid 26 and the combustion gas is ejected from the nozzle 19. At this time, the lid part 26 remains connected to the nozzle 19 by the connecting part 28 and is not blown away backward. Further, due to the elasticity of the connecting portion 28, the connecting portion 28 is instantly located at the side portion of the nozzle 19 as shown in FIG. 3, and is held in that state without receiving any airflow due to the action of the guide 17 and the like. Therefore, the lid portion 26 is located at a position where it does not interfere with the combustion gas ejected from the nozzle 19, that is, at a position outside the ejection area of the combustion gas. As a result, the bullet flies in a predetermined direction, and the nozzle closure 25 does not pose any danger to personnel near the gun. Note that the nozzle closure 25 may be attached to the nozzle holder 5a.

As explained above, since the lid of the nozzle closure separated from the nozzle remains connected to the rocket motor, a complete firing operation can be performed without forcing personnel near the gun to take precautionary measures. be able to.

[Brief explanation of drawings]

FIG. 1 is a schematic longitudinal sectional view of a bullet assembly equipped with a conventional rocket nozzle closure. Second,
3 is a diagram showing an embodiment of the nozzle closure of a rocket according to the present invention, FIG. 2 is a longitudinal sectional view in the nozzle closed state, FIG. 3 is a longitudinal sectional view in the nozzle open state, and FIG. 4 is a longitudinal sectional view in the nozzle open state. FIG. 3 is a view of the nozzle opening state as seen from the rear of the bullet. 2...Rocket motor, 19...Nozzle, 26
...Lid part, 28...Connection part, 15...Motor case.

Claims (1)

[Claims] 1. A nozzle closure for a rocket, comprising: a lid for closing a nozzle opening; a mounting part for mounting on a rocket motor; and a connecting part for connecting the lid and the mounting part.