JPH0743098A - Tubular fireworks for toy - Google Patents

Abstract

PURPOSE:To improve the safety of a toy skyrocket and the like and permit the reduction of the weight and the cost of the fireworks by a method wherein the cylindrical paper tube of the tubular toy fireworks is provided with a strong bottom retainer simply. CONSTITUTION:Adhesive agent is applied on the outer periphery of a molded plug 1 made of plastics, which is constituted of a circular plate unit 1a and a skirt section, formed integrally with the outer peripheral rim of the plate unit 1a, then, the molded plug 1 is inserted into a paper tube 2 from the lower end thereof so that the circulat plate unit 1a becomes upper side while charge 3 and a lead wire 4 are arranged on the circular plate unit 1a of the molded plug 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical firework for a toy in which a cylindrical paper tube is filled with powder.

[0002]

2. Description of the Related Art As is well known, a cylindrical fireworks for a toy that emits sparks and sparks from a cylindrical body set on the ground, or a cylindrical fireworks for a toy such as a launch firework is a cylindrical paper tube having a diameter of several centimeters. A bottom stopper (plug) is formed near the bottom end of the bottom with cement, soil or other irregular refractory material, and the bottom stopper is filled with explosives such as launch balls and propellant, and a squib penetrates the side of the paper tube. When the explosive is ignited by the squib, the powder or the like is blown out or a launch ball is fired. When the gunpowder is ignited in this way, a large load is applied to the bottom stopper as a reaction force of its ejection force. For this reason, it has been necessary to fill the soil or cement with a considerable thickness so that the bottom stopper can have the strength not to be destroyed even under such a load.

[0003]

However, as described above, the manufacturing process of forming the bottom stopper in the paper tube is troublesome, and it takes time such as drying at least one day and night. Since the product becomes heavy, it is not easy to handle and transport, and when vibration is applied, the soil etc. may break apart and come out, so it seems that the explosive powder spilled out. There was also a problem that it could be mistaken for.

[0004]

The tubular fireworks for a toy according to the present invention is intended to solve the above-mentioned problems. A plastic molded plug having a skirt portion integrally formed on the outer peripheral edge of a circular plate portion. An adhesive is applied to the outer periphery, the molding plug is inserted into the paper tube from its lower end so that the circular plate part faces upward, and the explosive and the squib are arranged on the circular plate part of the molding plug. It is characterized by

[0005]

A plastic molded plug replacing the bottom stopper made of the irregular refractory can be easily fixed in the paper tube in a short time. Further, the molded plug has a circular plate portion as described above. It is composed of a skirt portion and is inserted into the paper tube so that the circular plate portion faces upward. Therefore, when a large downward pressure is applied to the circular plate portion due to the explosion of explosive, the circular plate portion The skirt is deformed so as to be expanded further outward, and the adhesion with the inner surface of the paper tube is enhanced. For this reason, it functions as a very strong bottom stop, and there is no risk of falling off, improving safety. In addition, since it is formed of plastic in a hollow shape, it is lightweight and strong against vibration.

[0006]

An embodiment of the present invention will be described with reference to the drawings.
In the figure, 1 is a molded plug made of plastic, and the molded plug 1 has a cap-like shape in which a skirt portion 1b is integrally formed on the outer peripheral edge of a circular plate portion 1a so as to hang down. The upper half of the skirt portion 1b has a loose taper shape and a plurality of vertical grooves 1c are formed on the outer periphery thereof.

When inserting the molding plug 1 into the paper tube 2, an adhesive is applied to the outer periphery of the molding plug 1 so that the circular plate portion 1a of the molding plug 1 faces upward. Insert this from the bottom edge. Then, the explosive 3 and the squib 4 are arranged on the molding plug 1, and the tip of the squib 4 is projected from the side surface of the paper tube 2 to the outside.

An adhesive agent is held between the outer peripheral surface of the tapered skirt portion 1b and the inner surface of the paper tube 2 to maintain the adhesiveness with the inner surface of the paper tube 2 when the molding plug 1 is inserted. Further, since the vertical groove 1c is formed, the adhesive is retained also in the vertical groove 1c so that the adhesive property is further improved.

In the tubular fireworks for a toy configured as described above,
The bottom stopper can be simply and quickly set by inserting the molding plug 1 into the paper tube 2 and drying the adhesive, and the skirt portion of the outer peripheral edge of the circular plate portion 1a is positioned so that the circular plate portion 1a is located above. 1
Since b is adhered to the inner surface of the paper tube 2, the skirt portion 1b is expanded and strongly pressed against the inner surface of the paper tube 2 even if a strong pressure is applied to the circular plate portion 1a due to the explosive charge. Since the state of being firmly fixed inside 2 is maintained, there is no fear that the molding plug 1 will come out of the lower end of the paper tube 2 even if a large load is applied, and the safety of the toy fireworks is improved.

[0010]

As described above, according to the present invention, since a strong bottom stopper can be easily manufactured, it is possible to manufacture a safe, lightweight and easy-to-handle tubular fireworks for a toy at low cost. There is a beneficial effect to

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a tubular fireworks for a toy according to the present invention.

FIG. 2 is a perspective view of a molding plug.

FIG. 3 is an external perspective view of a tubular fireworks for a toy.

[Explanation of symbols]

 1 Molding Plug 1a Circular Plate 1b Skirt 1c Vertical Groove 2 Paper Tube 3 Explosive 4 Fuse

Claims (1)

[Claims] 1. An adhesive agent is applied to the outer periphery of a plastic molding plug having a skirt portion integrally formed on the outer peripheral edge of the circular plate portion, and the molding plug is made of paper so that the circular plate portion faces upward. A tubular fireworks for a toy, characterized in that it is inserted into a pipe from its lower end, and an explosive powder and a squib are arranged on a circular plate portion of the molding stopper.