JP3514543B2 - Toy fireworks - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to toy fireworks such as sparklers.

[0002]

2. Description of the Related Art The applicant of the present invention filed Japanese Patent Application No. 2-221623.
In (Japanese Patent Publication No. 6-80397), the toy fireworks shown in FIGS. 13 to 14 and 16 to 17 are provided.

The toy fireworks shown in FIGS.
Is formed by two inner and outer explosive layers 3, 5 so that the inner explosive layer 3 has a higher ignition temperature and a lower burning rate than the outer explosive layer 5, and further, an explosive charge 7 is provided at one end of the explosive portion 1. It is made by fixing. Note that the reference numeral 2 is an axis.

The toy fireworks shown in FIGS. 13-14 burn as shown in FIG. That is, (1) When the ignition charge 7 is ignited, the two explosive layers 3 and 5 inside and outside are ignited almost simultaneously due to the high heat generated by the ignition charge 7. (2) Since the outer explosive layer 5 has a higher burning rate than the inner explosive layer 3, the outer explosive layer 5 is fired first, and the inner explosive layer 3 is subsequently followed. Become. (3) First, the outer explosive layer 5 burns to the end. At this time, the inner explosive layer 3 is still burning. (4) Subsequently, the inner explosive layer 3 burns out.

The toy fireworks shown in FIGS. 16 to 17 are shown in FIGS.
In the toy fireworks shown in FIG. 14, the ignition powder is fixed to the other end of the explosive portion 1, in other words, the ignition powder is fixed to both ends of the explosive portion 1. That is, in the toy fireworks shown in FIGS. 16 to 17, the explosive portion 1 is formed by two explosive layers 3 and 5 inside and outside, and the inner explosive layer 3 has a higher ignition temperature and a lower burning rate than the outer explosive layer 5. In addition, ignition charges 7 and 9 are fixed to both ends of the explosive portion 1. Note that the reference numeral 2 is an axis.

The toy fireworks shown in FIGS. 16-17 burn as shown in FIG. That is, (1) The same as the toy fireworks shown in FIGS. (2) Same as the toy fireworks shown in FIGS. (3) When the outer explosive layer 5 burns to the other end, the ignition charge 9 at the other end is ignited. The other end of the inner explosive layer 3 is ignited by the high heat generated by the ignition charge 9. That is, the inner explosive layer 3 burns in the direction from one end to the other end, and simultaneously in the direction from the other end to the one end. (4) The inner explosive layer 3 burns from both directions and eventually burns out.

[0007]

The above-mentioned conventional toy fireworks show an interesting combustion mode as described above, but in the above-mentioned conventional toy fireworks, the inner and outer explosive layers 3, 5 always start burning at the same time, It burns at the same time. In other words, in the conventional toy fireworks, two flames are present at the same time. Thus, the present invention, only the outer explosive layer is ignited during ignition, first only the outer explosive layer burns from one end to the other end, when the outer explosive layer burns out at the other end, the outer explosive layer Of the new toy fireworks (in other words, one flame from one end of the explosive part to the other) It moves to one end and the other end is so-called U
Toy fireworks that turned to return to the end), and
When ignited, only the outer explosive layer ignites, first only the outer explosive layer burns independently from one end to a desired midpoint, and then at the midpoint, the outer explosive layer fires to the inner explosive layer as well. After that, a new toy firework in which the outer explosive layer burns at a high burning rate to the other end of the explosive part, while the inner explosive layer burns in both directions from the midpoint at a low burning rate It was made in an attempt to provide.

[0008]

Means for Solving the Problems As a result of intensive research to develop such a novel toy fireworks, the present inventor has found the following facts. That is, when the burning rate of the outer explosive layer is high, even if the outer explosive layer burns, the heat accumulation effect sufficient to ignite the inner explosive layer is not performed, so the inner explosive layer does not ignite. However, at the ignition end of the explosive portion, the ignition powder that gives a large amount of heat enough to ignite the inner explosive layer must not adhere to the outer explosive layer. On the other hand, in order to ignite the inner explosive layer by the heat of combustion of the outer explosive layer, it is necessary to perform a heat storage action sufficient to ignite the inner explosive layer by lowering the burning speed of the outer explosive layer. Is. The above also applies when the ignition temperature of the inner explosive layer is lower than the ignition temperature of the outer explosive layer. What is important in the present invention is not the ignition temperature of the inner and outer explosive layers, but the burning velocity of the outer explosive layers.

On the basis of the above facts, the present invention relates to a toy fireworks in which the explosive portion is formed by two explosive layers inside and outside,
The outer explosive layer has a high burning rate, and one end of the explosive part is set as an ignition end having no ignition charge, and the burning rate of the outer explosive layer is reduced on the surface of the outer explosive layer at the other end of the explosive part. A toy fireworks (claim 1) provided with a burning rate lowering means.

Further, according to the present invention, in a toy firework in which an explosive portion is formed by two inner and outer explosive layers, the outer explosive layer has a high burning speed, and one end of the explosive portion is an ignition end having no ignition powder, Toy fireworks characterized in that a burning rate reducing means for reducing the burning rate of the outer explosive layer is provided on the surface of the outer explosive layer at a desired position between the one end and the other end of the section ( Claim 2) is also provided.

The explosive portion may be branched into a plurality of pieces between the one end and the other end (claim 3).

A flame-retardant coating may be formed on the surface of the outer explosive layer at the other end of the explosive portion as the burning rate reducing means (claim 4).

An adhesive tape may be attached to the surface of the outer explosive layer at the other end of the explosive portion as the burning rate reducing means (claim 5).

A cap may be attached to the surface of the outer explosive layer at the other end of the explosive portion as the burning rate reducing means (claim 6).

[0015]

[Action]

[Toy fireworks according to claim 1] In the toy fireworks according to claim 1, one end of the explosive portion having no ignition charge is ignited.
When this happens, the toy fireworks burn as follows (see Figure 2). (1) Only the outer explosive layer starts burning, and the inner explosive layer does not start burning. When one end of the explosive part that does not have an igniting charge is ignited, the outer explosive layer ignites and starts burning, but since the outer explosive layer has a high burning speed, even if the outer explosive layer burns, There is not enough heat storage to ignite the explosive layer. In other words, since the propagation speed of the combustion reaction is high in the outer explosive layer, the temperature of each part in the inner explosive layer cannot be raised to the ignition point even if the outer explosive layer burns. (2) Thus, only the outer explosive layer continues to burn, and the fire approaches the other end of the explosive portion. (3) When the fire of the outer explosive layer reaches the burning velocity lowering means provided at the other end of the explosive portion, the burning velocity of the outer explosive layer is significantly reduced. Therefore, by burning the outer explosive layer,
The heat storage effect is sufficient to ignite the inner explosive layer. In other words, the outer explosive layer, at the other end of the explosive part, has a lower propagation velocity of the combustion reaction due to the combustion velocity lowering means, so that the other end of the inner explosive layer due to the combustion of the outer explosive layer The temperature can be raised to the ignition point. Therefore, the fire of the outer explosive layer moves to the inner explosive layer at the other end of the explosive portion, and the inner explosive layer starts to burn, but the outer explosive layer burns out at the other end of the explosive portion. (4) In this way, only the inner explosive layer burns from the other end of the explosive portion toward the one end. In summary, in the toy fireworks according to claim 1, when one end of the explosive part is ignited, first, only the outer explosive layer burns to the other end of the explosive part, and subsequently the fire moves to the inner explosive layer and "U". "Turn" and return to the one end of the explosive section.
In other words, in the toy fireworks of claim 1, the number of flames is always only one.

[Toy fireworks according to claim 2] In the toy fireworks according to claim 2, one end of the explosive portion having no ignition charge is ignited. When this happens, the toy fireworks burn as follows (see Figure 4). (1) For the same reason as above, only the outer explosive layer starts to burn and the inner explosive layer does not start to burn. At this point, the number of flames is one. (2) When the fire of the outer explosive layer reaches the burning speed reducing means provided on the surface of the outer explosive layer at a desired position between the one end and the other end of the explosive portion, the outer explosive layer is burnt for The fire of the explosive layer also transfers to the inner explosive layer at the midpoint, and thereafter the inner explosive layer and the outer explosive layer also burn. The inner explosive layer burns in both directions. At this point, the number of flames is three. (3) The outer explosive layer still burns toward the other end of the explosive portion, but since the outer explosive layer has a high burning speed, the outer explosive layer advances ahead of the inward explosive layer in the same direction. in the meantime,
The fire of the inner explosive layer also advances toward the one end of the explosive portion. During this time, the number of flames is three. (4) First, the fire of the outer explosive layer reaches the other end of the explosive part,
The outer gunpowder department burns out. Then, the fire of the inner explosive layer reaches both ends of the explosive portion, and the inner explosive portion is also burned out.

[Toy fireworks according to claim 3] In the toy fireworks according to claim 3, the explosive portion is branched into a plurality of pieces between the one end and the other end. First, the case where the burning speed reducing means is provided at the other end of the explosive portion will be described. When one end of the explosive portion that does not have an ignition charge is ignited, the toy fireworks burn as follows (see FIGS. 6 to 8). (1) For the same reason as above, only the outer explosive layer starts to burn and the inner explosive layer does not start to burn. (2) Only the outer explosive layer continues to burn, and the fire once branches into multiple pieces, merges again near the other end of the explosive portion, and approaches the other end (see FIG. 6). (3) For the same reason as described above, the fire of the outer explosive layer moves to the inner explosive layer at the other end of the explosive portion, and the inner explosive layer starts to burn, but the outer explosive layer of the explosive portion is Burns out at the other end (see Figure 7). (4) Only the inner explosive layer burns from the other end of the explosive portion toward the one end, and the fire once branches into a plurality of pieces, merges again near the explosive portion once, and burns to the one end ( (See FIG. 8).

On the other hand, the case where the burning speed reducing means is provided at a desired position between the one end and the other end of the explosive portion will be described. (1) For the same reason as above, only the outer explosive layer starts to burn and the inner explosive layer does not start to burn. At this point, the number of flames is one. (2) Only the outer explosive layer continues to burn, and the fire branches into a plurality (n). At this point, the number of flames becomes n. (3) When the fire of the outer explosive layer reaches the burning velocity lowering means, the fire of the outer explosive layer also moves to the inner explosive layer. After that, the inner explosive layer also burns together with the outer explosive layer. The inner explosive layer burns in both directions. At this point the number of flames is n +
2n = 3n (see FIG. 10). (4) The outer explosive layer still burns toward the other end of the explosive portion, but since the outer explosive layer has a high burning velocity, the outer explosive layer advances ahead of the inward explosive layer in the same direction. in the meantime,
The fire of the inner explosive layer also advances toward the one end of the explosive portion. The number of flames at this point is also 3n (see FIG. 11). (5) First, the fires of the outer explosive layer merge, reach the other end of the explosive portion, and the outer explosive portion burns out. Then, the fires of the inner explosive layers facing in both directions merge, reach both ends of the explosive portion, and the inner explosive portion is also burned out.

[Toy fireworks according to claim 4] The toy fireworks according to claim 4 is characterized in that a flame-retardant coating is formed on the surface of the outer explosive layer at the other end of the explosive portion as the burning velocity lowering means. The same effect as that of the toy fireworks according to claims 1 to 3 is achieved.

[Toy fireworks according to claim 5] The toy fireworks according to claim 5 is characterized in that an adhesive tape is attached to the surface of the outer explosive layer at the other end of the explosive portion as the burning speed lowering means. It has the same effect as the toy fireworks of Items 1-3.

[Toy fireworks according to claim 6] The toy fireworks according to claim 6 is characterized in that a cap is attached to the surface of the outer explosive layer at the other end of the explosive portion as the burning velocity lowering means. It has the same effect as the toy fireworks 1-3.

[0022]

Embodiments of the present invention will now be described with reference to the accompanying drawings (FIGS. 1 to 1).
It will be explained according to 2). First, the case shown in FIG. 1 will be described. Reference numeral 11 is an explosive portion, and reference numeral 13 is a shaft. The explosive portion 11 is formed by an inner explosive layer 15 and an outer explosive layer 17. It is assumed that the outer explosive layer 17 uses explosive having a high burning rate. As the inner explosive layer 15 and the outer explosive layer 17, for example, those having the following compositions are used. In the experiment conducted by the inventor, the burning rate of the outer explosive layer 17 having the above composition was about 7.7 mm / sec. Incidentally, the inner explosive layer 15 having the above composition
Burning rate was about 2.7 mm / sec.

Further, one end of the explosive portion 11 is used as an ignition end 19 having no igniting charge, and the other end of the explosive portion 11 is provided on the surface of the outer explosive layer 17 for reducing the burning speed of the outer explosive layer 17. Combustion speed reduction means 21 is provided (see FIG. 1).

Combustion velocity reducing means 21 for reducing the combustion velocity of the outer explosive layer 17 is provided on the surface of the outer explosive layer 17 at a desired position between the one end and the other end of the explosive portion 11. (See FIG. 3).

In the case shown in FIG. 5, the explosive portion 11 '.
Is branched into two between the one end and the other end.
In other respects, the case shown in FIG. 5 is similar to the case shown in FIG. Needless to say, the explosive portion 11 'does not necessarily have to be branched into two and may be branched into three or four or more.

In the case shown in FIG. 9, the explosive portion 11 '.
Is provided between the one end and the other end, and a combustion speed reducing means 21 for reducing the combustion speed of the outer explosive layer 17 is provided between the one end and the other end of the explosive portion 11. It is provided on the surface of the outer explosive layer 17 at the position.

A flame-retardant coating may be formed on the surface of the outer explosive layer 17 at the other end of the explosive portion 11 (11 ') as the burning speed reducing means 21. As the flame-retardant coating, for example, a mixture of a filler such as calcium carbonate and a sizing agent or a coating formed by adding an appropriate amount of an inorganic flame-retardant such as magnesium hydroxide to the coating to make it flame-retardant is used.

Further, an adhesive tape may be attached to the outer surface of the explosive layer 17 at the other end of the explosive portion 11 (11 ') as the burning speed reducing means 21.

Further, a cap made of synthetic resin or paper may be attached to the surface of the outer explosive layer 17 at the other end of the explosive portion 11 (11 ') as the burning speed reducing means 21.

[0030]

【The invention's effect】

[Toy fireworks according to claim 1] In the toy fireworks according to claim 1, when one end of the explosive part is ignited, first, only the outer explosive layer burns to the other end of the explosive part (while the inner explosive layer does not burn). ), Then the fire moves to the inner explosive layer and “U
A "turn" is returned to the one end of the explosive section, resulting in a combustion not found in conventional toy fireworks. Therefore, the fun of using the toy fireworks is remarkably improved.

[Toy fireworks according to claim 2] In the toy fireworks according to claim 2, only the outer explosive layer is ignited at the time of ignition, and first, only the outer explosive layer is independently burned from one end to a desired intermediate point. Subsequently, at the midpoint, the fire of the outer explosive layer moves to the inner explosive layer, and thereafter, the outer explosive layer burns to the other end of the explosive portion at a high burning rate, while the inner explosive layer is low. It burns in both directions from the midpoint at the burning velocity. Thus, even with the toy fireworks of claim 2, combustion that is not found in conventional toy fireworks can be obtained. Therefore, the fun of using the toy fireworks is remarkably improved.

[Toy Fireworks of Claim 3] In the toy fireworks of Claim 3, the explosive portion of the toy fireworks of Claim 1 or 2 is branched into a plurality, and as described above, the conventional toy fireworks. You get a burning that is not found in fireworks. Therefore, the fun of using the toy fireworks is remarkably improved.

[Toy fireworks according to claim 4] The toy fireworks according to claim 4 is characterized in that a flame-retardant coating is formed on the surface of the outer explosive layer at the other end of the explosive portion as the burning velocity lowering means. The same effects as those of the toy fireworks according to claims 1 to 3 are exhibited.

[Toy fireworks according to claim 5] The toy fireworks according to claim 5 is characterized in that an adhesive tape is attached to the surface of the outer explosive layer at the other end of the explosive portion as the burning velocity lowering means. It exhibits the same effect as the toy fireworks of Items 1-3.

[Toy fireworks according to claim 6] The toy fireworks according to claim 6 is characterized in that a cap is attached to the surface of the outer explosive layer at the other end of the explosive portion as the burning velocity lowering means. It has the same effect as the toy fireworks 1-3.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a toy firework according to the present invention.

FIG. 2 is an explanatory diagram showing a combustion mode of the toy fireworks.

FIG. 3 is a sectional view showing another example of the toy fireworks according to the present invention.

FIG. 4 is an explanatory diagram showing a combustion mode of the toy fireworks.

FIG. 5 is a sectional view showing still another example of the toy fireworks according to the present invention.

FIG. 6 is an explanatory diagram showing a combustion mode of the toy fireworks.

FIG. 7 is another explanatory diagram showing a combustion mode of the toy fireworks.

[Fig. 8] Fig. 8 is still another explanatory diagram showing a combustion mode of the toy fireworks.

FIG. 9 is a sectional view showing still another example of a toy firework according to the present invention.

FIG. 10 is an explanatory diagram showing a combustion mode of the toy fireworks.

FIG. 11 is another explanatory diagram showing a combustion mode of the toy fireworks.

FIG. 12 is still another explanatory diagram showing the combustion mode of the toy fireworks.

FIG. 13 is a side view showing an example of a conventional toy firework.

FIG. 14 is a cross-sectional view of the same toy fireworks.

FIG. 15 is an explanatory diagram showing a combustion mode of the toy fireworks.

FIG. 16 is a side view showing another example of the conventional toy fireworks.

FIG. 17 is a cross-sectional view of the same toy fireworks.

FIG. 18 is an explanatory diagram showing a combustion mode of the toy fireworks.

[Explanation of symbols]

1 Gunpowder department 2 axes 3 Inner explosive layer 5 Outer explosive layer 7 Ignition 9 ignition powder 11 Gunpowder department 11 'gunpowder department 13 axes 15 Inner explosive layer 17 Outer explosive layer 19 ignition end 21 Burning speed reduction means

Claims (6)

(57) [Claims] 1. In a toy fireworks having an explosive part formed of two inner and outer explosive layers, the outer explosive layer has a high burning velocity, one end of the explosive part is an ignition end having no ignition charge, and the other end of the explosive part is Toy fireworks, characterized in that a burning rate reducing means for reducing the burning rate of the outer explosive layer is provided on the surface of the outer explosive layer. 2. In a toy firework in which an explosive portion is formed of two inner and outer explosive layers, the outer explosive layer has a high burning speed, and one end of the explosive portion is an ignition end having no ignition charge, and the one end of the explosive portion is concerned. Toy fireworks, characterized in that the outer surface of the outer explosive layer at a desired position between the other end and the other end is provided with a burning rate reducing means for reducing the burning rate of the outer explosive layer. 3. The explosive portion is branched into a plurality of pieces between the one end and the other end.
Toy fireworks. 4. The toy fireworks according to claim 1, wherein a flame-retardant coating is formed on the surface of the outer explosive layer at the other end of the explosive portion as the burning speed reducing means. 5. The toy fireworks according to claim 1, wherein an adhesive tape is attached to the surface of the outer explosive layer at the other end of the explosive portion as the burning rate reducing means. 6. The toy fireworks according to claim 1, wherein a cap is attached to the surface of the outer explosive layer at the other end of the explosive portion as the burning velocity lowering means.