JPH0777400A - Toy sparkler - Google Patents

Abstract

PURPOSE:To simultaneously burn inner and outer gunpowder layers at different speeds by forming a flame retardant film on a surface of an outermost side gunpowder layer of an igniter in a toy sparkler in which an igniting temperature of the inner layer is set to higher temperature than that of the outer layer and lower burning speed than that of the outer layer. CONSTITUTION:A gunpowder part 20 is formed of two gunpowder layers 21, 22 and so prepared that an igniting temperature of the inner layer 21 is higher than that of the outer layer 22 and a burning speed of the inner layer 21 is lower than that of the outer layer. A flame retardant film 23 is formed on a surface of the igniter (an end of the part 20) of the part 20, i.e., on the surface of the layer 22. As the inner layer 21, iron powder agent made of barium sulfate and iron powder is, for example, used and as the layer 22, flame-coloring agent made of potassium perhydrochloride and copper oxide is, for example, used. As the film 23, mixture, etc., of filler of calcium carbonate and paste agent added with paint is, for example, used.

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 application has provided toy fireworks as shown in FIGS. 5 and 6 in Japanese Patent Application No. 2-221623.

The toy fireworks shown in FIG. 5 has an explosive portion 1 inside and outside 2
It is formed by two explosive layers 2 and 3, the inner explosive layer 2 has a higher ignition temperature and a lower burning rate than the outer explosive layer 3, and further the ignition powder 5 is fixed to one end of the explosive portion 1. It will be.

In the toy fireworks shown in FIG. 5, the ignition charge 5
When the fuel is ignited, the two explosive layers 2 and 3 inside and outside are ignited almost simultaneously due to the high heat generated by the igniting charge 5, but the explosive layer 3 outside is ignited.
Since the burning velocity is higher than that of the inner explosive layer 2, the outer explosive layer 3 is fired earlier, and the inner explosive layer 2 is fired later. Since the ignition temperature of the inner explosive layer 2 is higher than that of the outer explosive layer 3, the inner explosive layer 2 is not ignited by the preceding ignition of the outer explosive layer 3.

The toy fireworks shown in FIG. 6 has an explosive portion 6 inside and outside 3
Formed by two explosive layers 7, 8 and 9 so that the inner explosive layer has a higher ignition temperature and a lower burning rate than the outer explosive layer, and the explosive portion 10 has a portion of the explosive charge 10
It is made by fixing.

In the toy fireworks shown in FIG. 6, the ignition charge 1
When 0 is ignited, the high heat generated by the ignition charge 10 causes the inside and outside 3
The two explosive layers 7, 8 and 9 are ignited almost at the same time, but in order of increasing combustion speed, (1) the outer explosive layer 9, (2) the intermediate explosive layer 8, and (3) the inner explosive layer 7 in this order. Yes, the fires of these explosive layers 9, 8, 7 proceed in this order. Since the ignition temperature is higher in the middle explosive layer 8 than in the outer explosive layer 9 and higher in the inner explosive layer 7 than in the middle explosive layer 8, the ignition of the preceding outer explosive layer 9 causes The middle explosive layer 8 does not ignite, and the inner explosive layer 8 does not ignite due to the fire of the middle explosive layer 8.

[0007]

The above-mentioned conventional toy fireworks have an excellent effect that the inner and outer explosive layers burn at the same time and at different speeds, but it is still found to have the following problems. did. That is, in the above-mentioned conventional toy fireworks, an ignition charge for igniting the explosive part is adhered to a part or an end of the explosive part. Since the ignition powder burns immediately when the ignition powder is brought close to the ignition powder, even if the ignition powder on the outside has a low ignition temperature, the ignition powder on the outside often does not ignite. In other words, the user of the toy fireworks enjoys burning the toy fireworks by igniting the toy fireworks with a fire such as a candle and immediately separating the toy fireworks from the fire such as a candle when the ignition powder ignites. Therefore, even after the ignition charge is ignited, the explosive portion is not continuously heated by a fire such as a candle. That is, each explosive layer of the explosive portion is not heated and ignited by the heat of the fire of a candle or the like, but must be exclusively heated and ignited only by the heat of the ignition charge. However, even if the heat of the ignition powder alone ignites the outer explosive layer having a low ignition temperature, the inner explosive layer having a high ignition temperature may not ignite. If only the outer explosive layer is burned and the inner explosive layer is not burned, the above-mentioned conventional toy fireworks peculiar interest that the inner and outer explosive layers burn simultaneously and at different speeds is not exhibited. The present invention has been made in order to solve such a problem in the conventional toy fireworks.

[0008]

In order to solve the above-mentioned problems, the present invention has a flame-retardant coating formed on the surface of an ignition part in place of the ignition charge in the conventional toy fireworks.

That is, according to the present invention, in a toy firework in which the explosive portion is formed by a plurality of inner and outer explosive layers, and the inner explosive layer has a higher ignition temperature and a lower burning rate than the outer explosive layer, A toy fireworks characterized in that a flame-retardant coating is formed on the surface of the outermost explosive layer in the ignition part of the explosive part. (Claim 1)

Further, the present invention provides a toy fireworks in which the explosive portion is formed by two explosive layers inside and outside, and the inner explosive layer has a higher ignition temperature and a lower burning rate than the outer explosive layer. A toy fireworks characterized in that a flame-retardant coating is formed on the surface of an outer explosive layer in the ignition part of the explosive part. (Claim 2)

[0011]

In the toy fireworks according to the present invention, the explosive portion is formed by a plurality of inner and outer explosive layers, and the inner explosive layer has a higher ignition temperature and a lower burning rate than the outer explosive layer (claim) Item 1) or the explosive portion is formed by two inner and outer explosive layers, and the inner explosive layer has a higher ignition temperature and a lower burning velocity than the outer explosive layer (claim 2). Since it is the same as the conventional toy fireworks, the mode of combustion in which the inner and outer explosive layers burn at the same time and at different speeds is the same as the conventional toy fireworks.

In the toy fireworks according to the present invention, however, a flame-retardant coating is formed on the surface of the outer explosive layer in the ignition portion, instead of the ignition powder in the conventional toy fireworks.
Unlike the above-mentioned conventional toy fireworks, it works as follows. That is, the toy fireworks according to the present invention, like the above-mentioned conventional toy fireworks, has the user ignite the ignition part of the explosive part by a fire such as a candle, but the surface of the outer explosive layer in the ignition part is difficult. Since the flammable coating is formed, even the outer explosive layer having a low ignition temperature does not easily ignite. In other words, the flame-retardant coating is formed on the surface of the outer explosive layer in order to make it difficult for the outer explosive layer having a low ignition temperature to ignite. That is, the ignition powder in the conventional toy fireworks is fixed to the ignition part in order to facilitate ignition of the ignition part, whereas the flame-retardant coating in the toy fireworks of the present invention is applied to the outside of the low ignition temperature. It has the effect of delaying the ignition of the explosive layer, which is completely opposite to that of the ignition charge. Therefore, in order to ignite the ignition part of the explosive part, the user has to continue to apply a fire such as a candle to the ignition part for a relatively long time. Therefore, as a result of the ignition part being heated for a relatively long time by a fire such as a candle, if the ignition part is heated to such an extent that the outer explosive layer covered with the flame-retardant coating is ignited, the ignition temperature is high. The explosive layer will also ignite. In this way, the problem in the conventional toy fireworks that the inner explosive layer having a high ignition temperature is not ignited even when the outer explosive layer having a low ignition temperature is ignited at the time of ignition is solved.

[0013]

Embodiments of the present invention will now be described with reference to the accompanying drawings. In the embodiment shown in FIG. 1, the explosive portion 20 is formed by two inner and outer explosive layers 21, 22 so that the inner explosive layer 21 has a higher ignition temperature and a lower burning velocity than the outer explosive layer 22. None, and further, the surface of the ignition portion (the end portion of the explosive portion 20) of the explosive portion 20, that is, the outer explosive layer 2
A flame-retardant coating 23 is formed on the surface of 2. Inner explosive layer 2
For example, an iron powder agent composed of barium nitrate and iron powder is used as 1. As the outer explosive layer 22, for example, a flame colorant composed of potassium perchlorate and copper oxide is used. As the flame-retardant coating 23, for example, a mixture of a filler such as calcium carbonate and a sizing agent, or a coating obtained by adding an appropriate amount of an inorganic flame-retardant such as magnesium hydroxide to the coating to make it flame-retardant, is used. However, the flame-retardant coating 23 in the present invention may be any other flame-retardant coating. Reference numeral 25 is the axis of the explosive portion 20.

A combustion mode of the toy fireworks shown in FIG. 1 will be described with reference to FIG. If a flame such as a candle is continuously applied to the flame-retardant coating 23 on the surface of the ignition portion for a relatively long time, the two explosive layers 21 and 22 inside and outside are ignited almost simultaneously due to the heat of the fire such as a candle (FIG. 3 (1)). . Then, the outer explosive layer 22 has a higher burning rate than the inner explosive layer 21, so that the outer explosive layer 22 is fired earlier, and the inner explosive layer 21 is followed by the subsequent fire. (FIG. 3 (2)). First, the outer explosive layer 22 burns out, but at this time, the inner explosive layer 21
Is still burning (Fig. 3 (3)). Subsequently, the inner explosive layer 21 burns out (FIG. 3 (4)). Since the ignition temperature of the inner explosive layer 21 is higher than that of the outer explosive layer 22, the inner explosive layer 21 will not be ignited by the preceding fire of the outer explosive layer 22.

In the embodiment shown in FIG. 2, the explosive portion is formed by three inner and outer explosive layers 31, 32 and 33, and the inner explosive layer has a higher ignition temperature and a smaller burning speed than the outer explosive layer. I am trying to become. That is, the inner explosive layer 31 has a higher ignition temperature and a lower burning rate than the intermediate explosive layer 32, and the intermediate explosive layer 32 is the outer explosive layer 3
The ignition temperature is higher than 3 and the burning rate is lower. Further, a flame-retardant coating 34 is formed on the surface of the ignition portion (the end portion of the explosive portion 30) of the explosive portion 30, that is, the surface of the outermost explosive layer 33. The explosive layers 31, 32, 33 and the flame-retardant coating 34 may be the same as those in the above-mentioned embodiment, for example. Reference numeral 36 is an axis of the explosive portion 30.

A combustion mode of the toy fireworks shown in FIG. 2 will be described with reference to FIG. When a fire such as a candle is continuously applied to the flame-retardant coating 34 on the surface of the ignition portion for a relatively long time, the three explosive layers 31, 32 and 33 inside and outside are ignited substantially at the same time by the heat of the fire such as the candle (see FIG. )). Therefore, the combustion speed is in the order of (1) the outer explosive layer 33, (2) the intermediate explosive layer 32, and (3) the inner explosive layer 31, from the higher combustion rate, and the explosive layers 33, 32, 31 Proceed in this order (Fig. 4
(2)). First, the outer explosive layer 33 is burned out, but at this time, the intermediate explosive layer 32 and the inner explosive layer 31 are still burning (FIG. 4 (3)). Then, the intermediate explosive layer 3
2 burns out, but at this time, the inner explosive layer 31 is still burning (FIG. 4 (4)). Finally, the inner explosive layer 3
1 burns out (Fig. 4 (5)). Since the ignition temperature is higher in the middle explosive layer 32 than in the outer explosive layer 33 and higher in the inner explosive layer 31 than in the middle explosive layer 32,
The middle explosive layer 32 due to the fire of the preceding outer explosive layer 33
Does not ignite, and the inner explosive layer 31 does not ignite due to the fire of the intermediate explosive layer 32.

[0017]

As described above, according to the present invention,
Since a flame-retardant coating is formed on the surface of the outermost explosive layer in the ignition part instead of the ignition powder in the conventional toy fireworks, even if the outer explosive layer having a low ignition temperature during ignition is ignited, The problem with the above conventional toy fireworks that the tall inner explosive layer does not ignite is solved.

[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 a sectional view showing another example of the toy fireworks according to the present invention.

3 is an explanatory diagram showing a combustion mode of the toy fireworks shown in FIG. 1. FIG.

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

FIG. 5 is a cross-sectional view showing a conventional toy firework.

FIG. 6 is a cross-sectional view showing another conventional toy firework.

[Explanation of symbols]

 1 Explosive Part 2 Explosive Layer 3 Explosive Layer 5 Ignition Charge 6 Explosive Part 7 Explosive Layer 8 Explosive Layer 9 Explosive Layer 10 Ignition Charge 20 Explosive Part 21 Explosive Layer 22 Explosive Layer 23 Flame Retardant Coating 25 Axis 30 Explosive Part 31 Explosive Layer 32 Explosive layer 33 Explosive layer 34 Flame-retardant coating 36 Shaft

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[Procedure amendment]

[Submission date] April 15, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 5]

[Figure 4]

[Figure 6]

Claims (2)

[Claims] 1. A toy fireworks in which an explosive portion is formed of a plurality of inner and outer explosive layers, and an inner explosive layer has a higher ignition temperature and a lower burning rate than the outer explosive layer in order. A toy fireworks characterized in that a flame-retardant coating is formed on the surface of the outermost explosive layer in the ignition part. 2. A toy fireworks in which an explosive portion is formed by two inner and outer explosive layers, and an inner explosive layer has a higher ignition temperature and a lower burning rate than the outer explosive layer, and the explosive portion is ignited. Toy fireworks, characterized in that a flame-retardant coating is formed on the surface of the outer explosive layer in the part.