JP6988027B2 - Fireworks, plate-shaped gunpowder and how to launch fireworks - Google Patents

Description

The present invention relates to fireworks. The present invention also relates to a method for launching fireworks.

The "fireworks" referred to in the present invention are fireworks that are launched in a state where the explosive that produces the effect is ignited. It is not a fireworks display developed in the sky.
Conventionally, the "fireworks" referred to in the present invention uses a cylindrical cylinder to launch a spherical, columnar, or disc-shaped explosive. For example, as spherical fireworks, those described in Patent Documents 1 and 2 are known.

Japanese Unexamined Patent Publication No. 2011-196668 Japanese Unexamined Patent Publication No. 2016-20753

The first issue is as follows. Fireworks that have been used in the past do not fly linearly because the explosive (cylindrical or disc-shaped) rotates and bends because it receives a large amount of air resistance after being launched from a cylindrical cylinder.

The second issue is as follows. The heights of fireworks that have been used conventionally are difficult to match when multiple explosives are launched from one cylinder.

As a result of diligent research to solve the above problems, the present inventors have found that instead of the fireworks that have been used conventionally, a tubular hole having a slit shape at the outlet portion and a plate-shaped explosive that matches the slit shape. It was discovered that the first problem can be solved by using fireworks equipped with.

A cylindrical hole whose outlet portion has a slit shape and a plate-shaped explosive that matches the slit shape and has a hole are arranged in the tubular hole. If the launch is performed with another explosive placed in the hole of the plate-shaped explosive, the launch height of the explosive placed in the hole of the plate-shaped explosive becomes less variable, and the second problem can be solved.

According to one embodiment of the present invention, after the explosive is launched, the trajectory of the explosive becomes linear without bending left or right.

According to one embodiment of the present invention, the height variation is reduced when a plurality of explosives are launched from one cylinder.

In the first embodiment of the present invention, it is a vertical sectional view showing the internal structure of fireworks before launch. In the first embodiment of the present invention, it is a cross-sectional view which shows the internal structure of the fireworks before launch. (Cross section taken along line AA of FIG. 1a) In the first embodiment of the present invention, it is a perspective view of the fireworks immediately after launch. In the second embodiment of the present invention, it is a vertical sectional view showing the internal structure of a firework provided with a plurality of explosives that produce an effect before launch. In the second embodiment of the present invention, there is a cross-sectional view showing the internal structure of a firework provided with a plurality of explosives having an effect before launch. (Cross-sectional view taken along line BB in FIG. 2a) In the second embodiment of the present invention, it is a perspective view of a firework provided with a plurality of explosives that produce an effect immediately after launch. It is a vertical sectional view showing the internal structure of the fireworks before the conventional launch. It is a perspective view of the fireworks immediately after the conventional launch. It is a vertical cross-sectional view which shows the internal structure of the fireworks equipped with a plurality of explosives which produce an effect before a conventional launch. It is a perspective view of a firework equipped with a plurality of explosives that produce an effect immediately after a conventional launch. It is a side view in Example 1 of this invention. It is a cross-sectional view in Example 1 of this invention. (C-C line sectional view of FIG. 5a) It is a side view in Example 2 of this invention. It is a cross-sectional view in Example 2 of this invention. (Cross section taken along line DD of FIG. 6a) FIG. 3 is a vertical cross-sectional view showing the internal structure of a firework provided with a plurality of explosives having an effect before launch in the third embodiment of the present invention. FIG. 3 is a cross-sectional view showing the internal structure of a firework provided with a plurality of explosives having an effect before launch in the third embodiment of the present invention. (Cross section taken along line EE in FIG. 7a) FIG. 3 is a perspective view of a firework provided with a plurality of explosives having an effect immediately after launch in the third embodiment of the present invention.

FIG. 1 is shown as a first embodiment. The electric ignition device (2) is fixed to the bottom of the cylinder (13) whose outlet portion has a slit shape. Place the launch explosive (1) around it. Place a plate-shaped explosive (3) that produces an effect on it. The plate-shaped explosive (3) that produces an effect has a plate-shaped shape that matches the slit. The plate-shaped explosive (3) that produces an effect includes a first main surface (4), a second main surface (5), and a side surface (6).
When the electric ignition device (2) is energized, the launching explosive (1) is ignited, and the plate-shaped explosive (3) that produces an effect is launched while burning.
As a result, the orbit of the plate-shaped explosive (3) that produces the effect becomes linear. In the case of a disk, the ratio of diameter to thickness is preferably about 2: 1 to 10: 1.

The pressure receiving surface is the side surface (6) of the plate-shaped explosive that produces the effect. In the conventional fireworks shown in FIG. 3, the side having a large area of the columnar explosive (12) is used as the pressure receiving surface, but in the present embodiment, the side surface is used as the pressure receiving surface receiving the pressure from the launching explosive. ..
By flying the side surface of the plate-shaped explosive that matches the slit shape as the pressure receiving surface (6), it is possible to fly without receiving a large air resistance, and more linear flight becomes possible. In the conventional fireworks shown in FIG. 3, the columnar explosive (12) has a large area and is susceptible to air resistance, so that it easily rotates and causes bending.

The plate-shaped explosive (3) that produces an effect can be implemented in a triangle, a quadrangle, a pentagon, or the like as long as it has a planar shape, and is not limited to a disk-shaped shape.

If the outlet portion of the launch tube (13) has a slit shape, the outer shape of the launch tube may be rectangular, elliptical, or the like.
However, the gap between the plate-shaped explosive (3) and the launcher (13), which produces the effect, is preferably about 1 mm to 5 mm on both the short side and the long side. More preferably, it is about 1 mm to 2 mm. In the case of a rectangular launcher as shown in FIG. 1, the aspect ratio of the tube is preferably about 2: 1 to 10: 1.
In order to further improve the straightness, the aspect ratio of the launcher is more preferably about 1: 5.

FIG. 2 is shown as a second embodiment. The electric ignition device (2) is fixed to the bottom of the cylinder (13) whose outlet portion has a slit shape. Place the launch explosive (1) around it. A cylindrical explosive (7) that produces an effect is placed on it. A granular explosive (11) that exerts an effect is placed in the hole portion of the cylindrical explosive (7) that exerts an effect. When the electric ignition device (2) is energized, the launching explosive (1) is ignited, and the cylindrical explosive (7) having an effect and the granular explosive (11) having an effect are launched while burning.
The effective cylindrical explosive (7) has a hole in a plate-like shape that matches the slit. The location of the hole is preferably the central part of the plate-shaped explosive (7).

The shape of the cylindrical explosive (7) that produces the effect needs to have a role of pushing up the granular explosive (11) that produces the effect.
As long as the granular explosive (11) that produces the effect can be put in the central portion of the cylindrical explosive (7) that produces the effect, the shape of the cylindrical explosive (7) that produces the effect does not matter, but a disk shape is preferable. The shape of the hole in the center can be any shape such as a triangle or a quadrangle, but a circular shape is preferable.
If the plate-shaped explosive that produces the effect is a cylindrical explosive (7) with a hole in the center, the flight becomes more linear and stable. This hole may be either a bottomed hole or a through hole. More preferably, it is a through hole.
The granular explosive (11) that produces the effect fits in the hole of the cylindrical explosive (7) that produces the effect, and the cylindrical explosive (7) that produces the effect and the granular explosive (11) that produces the effect are integrated. Since it is launched out of the cylinder, the initial velocity of the launch is uniform and the heights are the same.
In the conventional fireworks shown in FIG. 4, the granular explosive (11) is pushed up by the columnar explosive (12), but the launch height is uniform because the launch pressure is not uniformly applied to the individual granular explosives and the initial velocity varies. Hateful.

The outer shape of the launcher (13) does not have to be square. The shape of the outlet portion of the launch tube, the outer shape of the launch tube, the size of the gap between the plate-shaped explosive and the slit, and the aspect ratio of the tube are the same as those in the first embodiment.

Hereinafter, the present embodiment will be described in more detail by way of examples, but the present embodiment is not limited thereto.

The first embodiment is shown in detail in FIG. The inside size of the launch tube 13 having a slit shape at the outlet portion is 24 mm in length, 5 mm in width, and 90 mm in height, and the tube is made of cardboard of 1.4 mm. As the launch powder 1, 0.65 g of black powder was used. The size of the plate-shaped explosive 3 producing the effect was a disk shape with a diameter of 20 mm and a thickness of 3 mm, and the weight was 0.9 g. The angle of incidence was set to 22 degrees with respect to the horizontal, and it was launched diagonally upward. When the fireworks created in this way were energized with an electric ignition device and ignited the launching explosive, the plate-shaped explosive 3 producing the effect flew linearly by about 3.5 to 6 m. The maximum bending width at the drop point about 4 m ahead of the launch point was about 7 degrees on one side, assuming 0 degrees when flying straight from the launch point. The conventional product flew about 6 to 8 m in a straight line from the launch point, and the bending width at about 4 m from the launch point was about 9 degrees on one side. It can be said that the bending width at a point about 4 m from the launch point has improved by about 23%.

Example 2 is shown in detail in FIG. The explosive was launched under the same conditions as in Example 1 except that a through hole having a diameter of about 8 mm was formed in the center of the cylindrical powder 7 to produce an effect, and the launch explosive (1) was made of black powder 0.6 g. The flight distance was about 4 m to 6 m. The maximum bending width at the drop point about 4 m ahead of the launch point was about 3.5 degrees on one side, assuming 0 degrees when flying straight from the launch point.
Further, in Example 1, 14 out of 164 cases had a downward turning trajectory, but in Example 2, 0 out of 38 cases were taken, and the flight was further linear.
Compared with Example 1, Example 2 tended not to bend vertically and horizontally.

Example 3 is shown in detail in FIG. The launcher is made of paper with a height of 250 mm, a length of 50 mm, a width of 25 mm, and a thickness of 2 mm. The effective cylindrical explosive (7) has a disk shape with an outer diameter of 38 mm, a through hole with a diameter of 26 mm in the center, and a thickness of 20 mm. The granular explosive (11) to be put into the central hole of the cylindrical explosive (7) that produces the effect is to put eight cubic explosives with a side of 8 mm or 15 6 mm square explosives. In each case, the launch height of the granular explosive (11) producing the effect was constant as compared with the conventional case.

1 Launch explosive 2 Electric ignition device 3 Plate-shaped explosive that produces effect 4 First main surface of plate-shaped explosive that produces effect 5 Second main surface of plate-shaped explosive that produces effect 6 Side surface of plate-shaped explosive that produces effect 7 Effect 8 Cylindrical explosive that produces an effect 9 First main surface of a cylindrical explosive that produces an effect 9 Second main surface of a cylindrical explosive that produces an effect 10 Sides of a cylindrical explosive that produces an effect 11 Granular explosive that produces an effect 12 Columnar explosive that produces an effect 13 Launcher 14 Upper bottom of the launcher 15 Lower bottom of the launcher 16 First side of the launcher 17 Second side of the launcher

Claims (7)

A slit-shaped outlet and a bottomed tubular hole having an inner surface extending from the slit-shaped outlet toward the bottom,
The launching explosive placed in the cylindrical hole and
A plate-shaped explosive that is arranged on the outlet side of the tubular hole with respect to the launch explosive and has a slit-shaped projection shape corresponding to the outlet when observed from the outlet.
Fireworks with. The tubular hole has a slit-shaped outlet having a pair of parallel long sides and a pair of short sides connecting the pair of long sides, and a pair of extending from the pair of parallel long sides toward the bottom. With a parallel inner surface,
The plate-shaped explosive has a pair of parallel main surfaces and side surfaces connecting the pair of main surfaces, and the inside of the tubular hole so that the pair of main surfaces are along the pair of parallel inner surfaces. Located in,
The fireworks according to claim 1. The fireworks according to claim 1 or 2, wherein the plate-shaped explosive has a hole in the center. The fireworks according to claim 3, wherein the gunpowder is contained in the hole. The plate-shaped explosive has a rectangular contour in a plan view, and one short side of the rectangle is located on the bottom side of the tubular hole, and the other short side is the outlet of the tubular hole. The fireworks according to any one of claims 1 to 4, which are arranged in the tubular hole so as to be located on the side. The fireworks according to any one of claims 1 to 4, wherein the plate-shaped explosive has a circular contour in a plan view. The method for launching fireworks according to any one of claims 1 to 6, which comprises igniting a launching explosive.

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