JPH09318300A - Cylinder for shooting firework - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light weight rigid cylinder for shooting fireworks and having the cylindrical part opaque or transparent, and further enable launching chemicals to be checked for its charged state from outside the cylinder. SOLUTION: A firework cylinder 10 is constructed to have a cylindrical section 12 having an inner layer cylinder 12a formed to have 3 to 15 times of prepreg filled with thermosetting resin on a sheet made of net-knitted reinforced fiber and an outer layer cylinder 12b of 2 to 5 times winding of continuous reinforced fibrous threads or reinforced fibrous belts impregnated with thermosetting resin on an outer circumferential surface of the inner layer cylinder 12a, and a bottom section 14 fixed to close the bottom surface of the cylindrical section 12. Engagement between the cylindrical section and the bottom section are reinforced by screws and by filling adhesive, wherein the reinforcing fiber and the thermosetting resin are made of opaque or transparent raw material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a smoke and fire launcher used for launching fireworks balls, and more particularly to a lightweight and durable smoke and fire launcher.

[0002]

2. Description of the Related Art In a fireworks ball, a split medicine made by mixing black powder and cotton seeds is placed in the center of a paper jade, and a color powder or smoke additive is placed in the space between the split medicine and the jade. It is packed with compacted, small spherical stars, and is further arranged so that a squib can be inserted from the outside of the bead into the split medicine as a spark. On the other hand, the smoke fire launcher
It is composed of a cylindrical tubular portion and a bottom portion fixed so as to close the bottom surface of the tubular portion. In order to launch a fireworks ball using such a fireworks launching cylinder, first, black powder is filled as a propellant at the bottom, and the fireworks ball is placed on it. Then, a pilot fire is thrown into the smoke launching tube to ignite the propellant, and thereby the squib of the fireworks ball is lit. Due to the explosion of the propellant, the fireworks ball is launched high in the air and explodes when the fire of the fuse reaches the split charge.

Usually, the inside of the smoke launcher is instantaneously heated to about 800 to 900 ° C. due to the explosion of the propellant and the pressure due to the explosion increases, so that the SPHC (hot Rolled steel plate) and SUS304, 316
The metal plate material was used in a cylindrical shape. Since a small firework ball requires a small explosion for launching, a smoke-fired launching cylinder for such a small firework ball is also a cylindrical one made by rolling thick paper.

[0004]

As described above, there are conventionally two types of smoke and fire launchers, one made of metal and the other made of paper. Paper-made ones were light but weak in strength and could not be used to launch large fireworks. On the other hand, those made of metal have the drawback of being heavy in weight, instead of being able to be made of high strength.

Generally, the launch site for fireworks has a poor foothold,
In many cases, the tracks cannot be directly attached horizontally. Therefore, in the case of launching a large number of fireworks, there is a drawback in that heavy smoke-fire launchers have to be carried over a long distance.

Further, a fireworks ball may explode in the smoke launching cylinder due to forgetting to put in the propellant, and the repeated explosions may damage the smoke launching cylinder and injure the operator. This is if the smoke fire launcher can be seen through,
It is obvious whether or not there is propellant.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks of the prior art and to provide a light and durable smoke-fire launcher.

Another object of the present invention is to provide a smoke launching cylinder whose translucent or transparent tubular portion allows the propellant to be seen from the outside to be seen through.

[0009]

The invention according to claim 1 is an inner layer formed by stacking a prepreg made by filling a thermosetting resin in a sheet made of net-woven reinforcing fibers 3 to 15 times. The cylinder and the reinforcing fiber thread or the reinforcing fiber band impregnated with the thermosetting resin on the outer peripheral surface of the inner cylinder are continuous in the circumferential direction.
Provided is a smoke-fire launching tube including a tubular portion having an outer layer tubular body formed by wrapping five times and a bottom portion fixed so as to close the bottom surface of the tubular portion.

According to a second aspect of the present invention, in the smoke fire launching cylinder of the first aspect, the bottom portion is a lid-shaped bottom portion that fits on the outer peripheral surface of the lower portion of the tubular portion, and the lid-shaped bottom portion is formed by a screw. The cylinder is engaged with the screw so that the screw protrudes to the inner surface of the cylinder, and a fiber reinforced plastic is added to cover the protrusion of the screw.
The bottom portion and the tubular portion are engaged with each other by filling with an adhesive containing 0% or more.

The invention according to claim 3 is the smoke-fired launching cylinder according to claim 1 or 2, characterized in that the reinforcing fiber and the thermosetting resin are made of a semitransparent or transparent material.

According to a fourth aspect of the present invention, in the smoke fire launching cylinder according to the third aspect, the reinforcing fiber is a glass fiber and the thermosetting resin is an epoxy resin.

The invention described in claim 5 is the invention as claimed in claims 1 to 3.
In the smoke-fired launching cylinder described in (1), the axial seams of the sheets forming the inner layer cylinder are displaced from each other in the circumferential direction.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The smoke fire launcher according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an exploded perspective view of an embodiment of a smoke and fire launching tube according to the present invention, in which a part of the outer layer tube is cut away. 2 (a) and 2 (b) are a front view and a plan view of the inner layer cylinder of the smoke-fire launching cylinder of FIG. 1, respectively. FIG.
(A) And (b) is a front view of a different Example of the outer layer cylinder of the smoke launching cylinder of Drawing 1, respectively. FIG. 4 is a vertical cross-sectional view showing the engagement state between the cylindrical portion and the bottom portion of this embodiment.

The smoke-fired launching cylinder 10 according to the present invention is generally a cylindrical tubular portion 12 made of fiber reinforced plastic, and a bottom portion 14 made of fiber reinforced plastic fixed so as to close the bottom surface of the tubular portion 12. It consists of and.

The tubular portion 12 is made of a prepreg made by filling a sheet made of net-woven reinforcing fibers with a thermosetting resin.
Inner layer cylinder 12a formed by stacking up to 15 times and inner layer cylinder 1
On the outer peripheral surface of 2a, there is provided an outer layer cylinder 12b which is formed by winding reinforcing fiber threads or reinforcing fibers impregnated with a thermosetting resin and continuous in the circumferential direction 2 to 5 times.

As shown in FIG. 4, the bottom portion 14 is a lid-shaped bottom portion that fits on the outer peripheral surface of the lower portion of the tubular portion 12, and the lid-shaped bottom portion and the tubular portion are connected by a screw to the inner surface of the tubular portion 12. The bottom portion 14 and the cylindrical portion 12 are filled with an adhesive containing 50% or more of fiber reinforced plastic (hereinafter referred to as FRP) so as to cover the protruding portion of the screw. Engages and reinforces.

As the reinforcing fiber, polyamide fiber, polyester fiber, Kevlar aramid fiber, carbon fiber, glass fiber (E glass), or aluminum oxide fiber, magnesium oxide, boron nitride fiber, silicone carbide which has been recently researched and developed. Various organic and inorganic fibers such as fibers of inorganic base materials such as fibers can be used. Compared with organic fiber, carbon fiber, glass fiber (E glass),
Alternatively, the inorganic base fiber is resistant to heat and has a tensile strength of several times to a dozen times, so that it is a preferable material excluding the cost.

As the thermosetting resin, various plastic materials can be used. For example, a B-stage thermosetting resin such as an epoxy resin, an unsaturated polyester resin, a phenol resin or a polyimide resin can be used. it can. Such thermosetting resins can be used by reinforcing fibers of the same type or different types stacked regularly or irregularly.

If both the reinforcing fiber and the thermosetting resin are made of a semitransparent or transparent material, for example, the reinforcing fiber is made of glass fiber and the thermosetting resin is made of epoxy resin, the tubular portion 1
2 can be seen through, and the presence or absence of propellant can be visually confirmed from the outside. Therefore, it is possible to prevent the fireworks balls from exploding inside the fireworks launching cylinder due to forgetting to put in the propellant, etc. It has the advantage that it can.

The inner layer cylinder 12a is composed of prepregs piled up 3 to 15 times, but as shown in FIG. 2 (b), the seams of the sheets, which are the base materials of the prepregs, are arranged in the circumferential direction. It is preferable that they are offset. By doing so, the strength of the tubular portion 12 against internal explosion can be improved, and even if the inner layer tubular 12a is destroyed, the prepreg of each layer will move in the opposite direction in the circumferential direction, so that it will not scatter into pieces. Can be prevented. This makes it possible to dramatically improve safety.

Further, the outer layer cylinder 12b is to further reinforce the inner layer cylinder 12a with a member continuous in the circumferential direction.
As shown in (a) and (b), 2 to 5 reinforcing fiber threads or reinforcing fiber bands impregnated with a thermosetting resin and continuous in the circumferential direction are provided.
It is manufactured by winding it in multiple layers. Since the outer layer cylinder 12b is not directly affected by heat, it is possible to use an organic reinforcing fiber that can be obtained at low cost. The smaller the angle of the reinforcing fiber yarn or the reinforcing fiber band with respect to the axial direction, the greater the number of turns, so the strength increases.

Since the smoke-fired launching cylinder 10 of the present invention is basically manufactured by using only a lightweight material, the weight as a whole is significantly larger than that of the conventional metal smoke-fired launching cylinder. Get smaller. Therefore, it can be easily carried even in places with poor scaffolding such as fireworks launching place, and it can be carried even if a plurality of smoke fire launchers with different diameters are put inside, so it is possible to carry it between the truck and launching place. The number of round trips can be reduced.

Further, the strength of the smoke fire launching cylinder 10 is as follows.
It can be easily changed depending on the number of laminated prepregs constituting the 2a and the number of rounds of the outer layer tube 12b, and the optimum strength can be easily obtained according to the diameter of the fireworks ball to be launched.

[0026]

EFFECTS OF THE INVENTION The smoke-fired launching cylinder of the present invention comprises an inner cylinder formed by stacking a prepreg made by filling a thermosetting resin on a sheet made of net-woven reinforcing fibers 3 to 15 times, and an inner layer. A cylindrical portion having an outer layer cylinder formed by wrapping a circumferentially continuous reinforcing fiber yarn or reinforcing fiber band impregnated with a thermosetting resin on the outer peripheral surface of the cylinder for 2 to 5 times and closing the bottom surface of the cylindrical portion. Since it is configured to have a fixed bottom portion as described above, it has an advantage of being lightweight and durable.

The bottom portion is a lid-shaped bottom portion that fits on the outer peripheral surface of the lower portion of the tubular portion, and the lid-shaped bottom portion and the tubular portion are engaged with each other so that the screw projects toward the inner surface of the tubular portion. F. so as to cover the protruding portion of the screw. R. Since the adhesive containing 50% or more of P is filled and reinforced, the explosive force is not received only by the screw part, but the tubular part and the bottom part can be received in an integrated state. It can be prevented.

If the reinforcing fiber and the thermosetting resin are made of a semi-transparent or transparent material, the cylindrical portion can be seen through, so that it is possible to visually confirm whether or not the propellant is contained from the outside. It is possible to prevent the smoke fire launcher from exploding due to forgetting to put it in.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of a smoke and fire launcher according to the present invention.

2A and 2B are respectively a front view and a plan view of an inner layer cylinder of the smoke-fire launching cylinder of FIG.

3 (a) and 3 (b) are front views of different embodiments of the outer layer cylinder of the smoke-fire launching cylinder of FIG. 1, respectively.

FIG. 4 is a vertical cross-sectional view showing an engagement state between a cylindrical portion and a bottom portion of the present embodiment.

[Explanation of symbols]

 10 Fire Fire Discharge Tube 12 Tube Part 12a Inner Layer Tube 12b Outer Layer Tube 13 Seam 14 Bottom 15 Screw 16 Filling Adhesive

Claims (5)

[Claims] 1. An inner layer cylinder formed by stacking a prepreg formed by filling a thermosetting resin in a sheet made of a net-woven reinforcing fiber 3 to 15 times, and a thermosetting material on the outer peripheral surface of the inner layer cylinder. A cylindrical part having an outer layer cylinder formed by wrapping a resin-impregnated continuous reinforcing fiber thread or reinforcing fiber band 2 to 5 times, and a bottom part fixed so as to close the bottom surface of the cylindrical part. A fire-fire launcher composed of 2. The bottom portion is a lid-shaped bottom portion that fits on the outer peripheral surface of the lower portion of the tubular portion, and the lid-shaped bottom portion and the tubular portion are engaged by a screw so that the screw projects toward the inner surface of the tubular portion. The fiber reinforced plastic to cover the protruding part of the screw.
The fireworks launching cylinder according to claim 1, wherein the bottom portion and the tubular portion are engaged with each other by filling with an adhesive containing at least%. 3. The reinforcing fiber and the thermosetting resin are made of a semitransparent or transparent material.
The smoke fire launcher described in. 4. The reinforcing fiber is glass fiber,
The smoke-fire launcher according to claim 3, wherein the thermosetting resin is an epoxy resin. 5. The smoke fire launcher according to claim 1, wherein axial seams of the respective sheets forming the inner layer cylinder are displaced from each other in the circumferential direction.