JPH09273899A - Lid for fireworks launching cylinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve easier preparations for launching and moreover, a prevention of the early induction in the shooting of smoke fire balls. SOLUTION: In a plate-shaped lid 22 to be inserted into an upper part of a launching cylinder, a cutting line 30 is provided in the center of a bottom part from one side of the side wall part 26 and the cutting line 30 is expanded to insert a time delayed fuse 12 to the center of the bottom part from the one side. The lid 22 thus obtained is inserted to be assembled into the upper part of the launching cylinder and then, the tip of the time delayed fuse 12 is pulled outside the launching cylinder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a launch tube for fireworks and the like, and more particularly to a lid thereof.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 4, when launching a smoke fireball 2 of a launch fireworks, a launching explosive 6 is packed in a bottom portion of a launching cylinder 4 having a bottom, and the explosive bag 8 The smoke fireball 2 placed on top is launched to a high altitude by the explosion pressure of the launch explosive 6.

The lower end portion of a long rapid squib 10 is inserted in the powder bag 8, and this rapid squib 10 has a smoke ball 2
Through the gap between the launch tube 4 and the launch tube 4, the extended squib 12 connected to the tip of the launch tube 4 penetrates the paper lid 14 provided to cover the upper end of the launch tube 4 and is guided to the outside. The explosive charge 6 is exploded by the ignition of the delay fuse 12. Here, procrastination fuse 1
2 is led out to the outside through an insertion hole 14a (see FIG. 7) formed in the center of the paper lid 14. In addition, the time from the ignition of the delay fuse 12 to the explosion of the launch explosive 6 is adjusted by the length of the delay fuse 12 (about 1 second at 1 cm), and the fast fuse 10 is launched almost instantly when ignited. The explosive 6 is ignited and exploded.

In the case of continuous launch, as shown in FIG. 5, the rapid ignition squib 18 for simultaneous ignition is routed so as to cross over the launch cylinders 4, 4, ... Each launch upper cylinder 4 on the rapid ignition squib 18 for ignition
The tip of the extended squib 12 led out from the central part of the paper lid 14 at the upper end is twisted and tied through the igniter 16 and the delayed squib 12 of each launch tube 4 is ignited at once by the rapid squib 18 and the extended squib The fireballs 2 are launched and fired in order from the shortest of 12.

[0005]

By the way, conventionally, as a stage for preparing to launch fireworks, conventionally, as shown in FIG. 6, an explosive bag 8, a rapid ignition squib 10, an extended detonation squib 12 and an ignition squib 1 are shown.
6 is sequentially connected, and a pre-assembly 20 in which a paper lid 14 is preliminarily attached to the extended detonator 12 is manufactured in advance in a factory, and a large number of the launch tubes 4, 4 are arranged side by side at the launch site. The preliminary assembly 20 and the fireball 2 were sequentially loaded and set in the state shown in FIG.

However, according to such a conventional setting method, when the preparatory assembly 20 is manufactured, when the delay fuse 12 is short, this delay fuse 12 is used.
When the paper is first inserted into the paper lid 14, the delay fuse 1
2 becomes difficult to connect to the rapid fire squib 10, while it becomes difficult to insert the delayed squib 12 into the paper lid 14 after the delayed squib 12 is inserted into the paper lid 14 in any case. There was a problem that it took.

In addition, the prepared pre-assembly 20 is transported to the launch site in a state in which a required number of them are bundled and packed in a box. However, the problem that the paper lid 14 is bulky and takes a large space, and this is bulky. As a result, there has been a problem that the paper lid 14 and the extended squib 12 are easily damaged during transportation.

Therefore, as a method of improving these problems, as shown in FIGS. 8 to 9, the paper lid 14 is not attached as the preassembly 20 ', and the paper lid 1 is not attached.
No. 4 has no insertion hole and is installed at the end at the site.
Although it is possible to lead it out to the outside from between 4 and 4, and to do so, it is difficult to avoid the formation of a gap s between the extended squib 12 as shown in FIG. And if there is such a gap s, the delayed fuse 1
The sparks of the rapid firing squib 18 for simultaneous ignition for igniting 2 and the sparks at the time of launch from the adjacent launch tube fly into the interior through the gap s, and the launch timing has not come yet. There is a risk that the fireball 2 will be launched and fired early from the cylinder.

The present invention has been made in view of the above circumstances, and an object thereof is to make a preparation for launching easily, and to prevent the early firing of a fireball as much as possible. Is to provide a lid.

[0010]

In order to achieve the above object, the invention according to claim 1 is a lid which is inserted into an upper portion of a launch cylinder, and has a bottom portion having a diameter slightly smaller than the inner diameter of the launch cylinder. And a side wall portion integrally erected from the outer peripheral edge of the bottom portion so as to be in sliding contact with the inner periphery of the launch cylinder,
It has a notch line provided from one side of the side wall portion to an intermediate portion of the bottom part, and an ignition wire for launching explosive can be inserted into the launch tube through the notch line.

The invention of claim 2 is the above-mentioned claim 1.
In the lid of the fireworks launching cylinder, the cut line is formed so as to widen in a wedge shape from the bottom side to the edge portion in the side wall portion.

According to the lid of the launch cylinder of the above-mentioned claim 1,
By expanding the part by twisting the left and right parts of the score line up and down, it is possible to easily insert the ignition wire from one side of the side wall part to the middle part of the bottom part and place it in the launch tube. Even after the launch explosive, the ignition wire that ignites this explosive, and the fireball have been loaded, the ignition wire can be easily inserted into the middle of the bottom of the lid and assembled to the upper part of the launch tube. The on-site setup can be performed as easily and quickly as possible, and the setup work can be simplified especially when a large number of fireballs are continuously launched.

Further, since the pre-assembled body, which is prepared by previously assembling the explosive bag for the explosive powder and the ignition wire, at the factory, does not need to include the lid, the pre-assembled body is not bulky, and thus the transportation is easy. In addition, it is possible to prevent the ignition wire and the like from being damaged due to the bulkiness of the lid, which has occurred conventionally.

Further, since the ignition wire is inserted through the middle part of the bottom of the lid, there is no gap between the lid and the launch tube, so that no sparks from the outside enter into the launch tube through the gap, and the launch tube is launched. It is possible to effectively prevent erroneous firing due to the induction of a fireball that does not arrive at the timing.

According to the lid of the launching cylinder of the second aspect, even if there is a slight difference in diameter between the inner diameter of the launching cylinder and the outer shape of the lid, the wedge-shaped cut line portion provided on the side wall portion. Since the difference is absorbed by the gap, the closeness between the two can be improved.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION A lid for a launching cylinder according to the present invention will be described below with reference to the illustrated embodiment.

1 to 3 show a lid of a launching cylinder according to the present invention, FIG. 1 is a perspective view thereof, and FIG. 2 is a diagram for explaining a state in which a delay squib as an ignition wire is attached to the lid,
FIG. 3 is a plan view showing a state after the extended squib is attached. The contents shown in FIGS. 4, 5, and 8 described in the above-mentioned conventional technique are common to the present embodiment in parts other than the lid. Therefore, in the following description, FIG.
The lid of this embodiment will be described in detail with reference to FIGS. 5 and 8.

As shown in FIG. 1, the lid 2 in the present embodiment.
Reference numeral 2 denotes a circular plate-shaped bottom portion 24 having a diameter slightly smaller than the inner diameter of the upper portion of the launch cylinder 4, and a side wall portion 26 that is integrally erected from the outer peripheral edge thereof and is raised so as to be in sliding contact with the inner circumference of the launch cylinder 4.
And has a dish-like shape as a whole, that is, the side wall portion 26 is formed in a slightly open shape. Further, the bottom portion 24 is provided with an insertion hole 28 for inserting and arranging the extended squib 12 which is an ignition wire, at an intermediate portion thereof, that is, substantially in the center of the bottom portion 24 here. The insertion hole 28 is formed by pushing from one side of the bottom portion 24 with a sharp tool such as a punch having a diameter corresponding to the extended squib 12.

The structure up to this point is the same as that of the conventional lid 14 shown in FIG. 7 and the like, and the lid 22 of this embodiment is also made of paper. Here, the lid 22 may be formed of a synthetic resin or the like, but in consideration of heat resistance at the time of launching, scattering to the surroundings, etc., it is desirable to use light weight paper that has instantaneous heat resistance and is particularly preferable. Considering the difficulty of recovery, which is not known where the particles will be scattered at the time of launch, it is best to use paper that has excellent natural degradability from the viewpoint of environmental pollution.

By the way, in the lid 22 of this embodiment,
A cut line 30 is provided from one side of the side wall portion 26 to the insertion hole 28 in the middle portion of the bottom portion 24.
This score line 30 is formed here with a cutter knife. In addition, the side wall portion 26 of the cut line 30.
The cut line portion 30a in the above is formed in a wedge shape with an upper opening toward the end edge side standing from the bottom portion 24 side, and when inserted into the launch tube 4, the cut line portion 3a is formed.
The left and right side wall portions are centered on the center 0a, and function as an adjusting portion that closely matches the inner diameter of the launching cylinder 4.

According to this lid 22, as shown in FIG.
The extended squib 12 is inserted from the cut line 30 and is moved along the cut line 30 to the insertion hole 28 part of the bottom portion 24 and the middle of the cut line 30 to move the insertion hole 28 of the lid 22.
It is inserted through the part. At this time, the lid 22 has a cut line 3
If the left and right of 0 are twisted up and down, the cut line 3
Since the zero portion easily expands, it can be easily and quickly inserted and attached without damaging the extended squib 12.

Therefore, even after the preassembly 20 'shown in FIG. 8 is loaded into the launch tube 4 together with the fireball 2, the delay fuse is assembled as the preassembly 20' very easily without any work. It can be attached to 12 parts, and after that, the setup of the individual launch cylinders can be completed by a simple operation of pushing the lid 22 into the upper part of the launch cylinder 4 and inserting it.

Since the bottom portion 24 of the lid 22 is slightly smaller than the inner diameter of the launching cylinder 4 and the side wall portion 26 is formed in the shape of a plate that opens upwardly, it is inserted into the upper portion of the launching cylinder 4 from above. It enters easily and its side wall portion 26 fits snugly against the inner surface of the launch tube 4. Even if there is a slight difference in diameter between the inner diameter of the launch tube 4 and the outer shape of the lid 22, the difference is absorbed by the wedge-shaped gap of the cut line portion 30a provided in the side wall portion 26, and the difference between the two is absorbed. Closeness is not hindered.

Further, since the insertion hole 28 is formed by pushing out from one side of the bottom portion 24 with a sharp tool such as a punch having a diameter corresponding to the delay fuse 12, the circumference of the delay fuse 12 is surrounded by the periphery of the insertion hole 28. The extended detonator 1 in this insertion hole 28 is surrounded by the remaining torn pieces of torn paper.
There is almost no gap around the circumference of 2.

In the case of continuous launch, as in the conventional case shown in FIG. 5, the rapid ignition squib 18 for simultaneous ignition, which is routed so as to traverse over the launch cylinders 4, 4, ... It suffices to twist and connect the ignition wire 16 at the tip of the extended squib 12 drawn out from the launch tube 4 to the outside.

That is, as the launch tube 4 is closed by the lid 22 as described above, the extended squib 12 is pulled out to the outside, so that the fireball 2 is launched from the launch tube 4 adjacent to the inside thereof. There is no intrusion of sparks or sparks from the rapid squib 18 for simultaneous ignition,
Therefore, it is possible to prevent a phenomenon in which the fireball 2 of the launch tube 4 which has not yet reached the launch timing is erroneously fired.

Further, since the lid 22 can be easily installed on site, it is not necessary to include the lid 22 in the pre-assembly 20 'which is preassembled in the factory.
Even when the ‘′ is transported to the site, the cover 22 does not occupy a bulky space, and further, the delay fuse 12 and the rapid fire squib 10 are not damaged due to the bulkiness.

As described above, the use of the lid 22 provided with the cut lines 30 as shown in FIGS. 1 to 3 described above can facilitate the mounting work, and therefore, particularly in the case of performing continuous launch, many It can be easily attached to the launch cylinders 4, 4 ... in a short time, which simplifies the launch preparation work on site as much as possible and is extremely useful as a means to completely prevent accidental firing due to induction. It is effective and can contribute to the improvement of safety.

The cut line 30 and the insertion hole 28 are preferably formed at the same time when the lid 10 is formed by a press molding machine. Further, as shown in FIG. 3, if the craft tape 32 or the like is attached to the cut line 30 after the lid 22 is assembled, it is possible to more reliably prevent the erroneous firing.

In the above-described embodiment, the case where the lid according to the present invention is used in the one using the explosive-type fast-fire squib 10 and the delay squib 12 as the ignition line of the launch fireworks is shown. The lid 22 according to can be applied to an electric ignition type using an electric wire as an ignition wire.

[0031]

In summary, according to the present invention, the following excellent effects can be obtained.

(1) According to the lid of the launching cylinder of claim 1, the ignition wire is expanded from one side of the side wall to the bottom middle by twisting the left and right parts of the score line up and down. Since it can be easily inserted and placed up to the part, even after loading the launch gunpowder, the ignition wire for igniting this explosive, and the fireball, the ignition wire can be easily attached to the bottom of the lid. Since it can be inserted in the middle of the box and assembled on the upper part of the launch tube, the setup at the launch site can be performed as easily and quickly as possible, especially for the case where a large number of fireballs are continuously launched. The work can be simplified.

Further, since the pre-assembly, which is produced by previously assembling the explosive bag for the explosive powder and the ignition wire, at the factory, does not need to include the lid, the pre-assembly is not bulky and is easy to carry. In addition, it is possible to prevent the ignition wire and the like from being damaged due to the bulkiness of the lid, which has occurred conventionally.

Further, since the ignition wire is inserted through the middle portion of the bottom of the lid, there is no gap between the lid and the launch tube, so that no sparks from the outside enter into the launch tube through the gap and the launch tube is launched. It is possible to effectively prevent erroneous firing due to the induction of a fireball that does not arrive at the timing.

(2) According to the lid of the launching cylinder of claim 2, even if there is a slight difference in diameter between the inner diameter of the launching cylinder and the outer diameter of the lid, the wedge of the cut line portion provided in the side wall portion. Since the difference is absorbed by the gaps, the closeness between the two can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a lid of a fireworks launching tube according to the present invention.

FIG. 2 is a view showing a manner in which an extended fuse is inserted and attached to the lid of FIG.

FIG. 3 is a plan view showing a state after attachment of a delayed fuse.

FIG. 4 is a cross-sectional view of a launching cylinder for explaining a completed state of launching preparation, and is a view common to the present invention and the related art.

FIG. 5 is a view showing a firework launching barrel during continuous launching, which is common to the present invention and the conventional art.

FIG. 6 is a diagram showing a conventional example of a pre-assembled body which is manufactured in advance in a factory.

FIG. 7 is a plan view showing a conventional lid.

FIG. 8 is a view showing another conventional example of the pre-assembly, which is also common to the embodiments of the present invention.

9 is a cross-sectional view of a launch tube showing another conventional example in which launch preparation is completed using the pre-assembly of FIG.

FIG. 10 is a plan view of FIG. 9;

[Explanation of symbols]

2 Smoke Fireball 4 Launch Tube 6 Explosive Explosive 8 Explosive Bag 10 High Speed Firing Line 12 Delayed Firing Line 16 Firing Line 18 Continuous Launching Fast Firing Line 20 'Pre-assembly 22 Lid 24 Bottom 26 Sidewall 28 Insertion Hole 30 Cut Line

Claims (2)

[Claims] 1. A lid to be inserted into an upper part of a launch cylinder, the bottom part having a diameter slightly smaller than the inner diameter of the launch cylinder, and an upright body integrally slidably contacting the outer periphery of the bottom part to the inner circumference of the launch cylinder. A side wall portion and a score line provided from one side of the side wall portion to an intermediate portion of the bottom portion,
A pyrotechnic launch tube lid characterized in that an ignition line to the launch powder can be inserted into the launch tube through the cut line. 2. The lid of the pyrotechnic launch tube according to claim 1, wherein the cut line is formed by expanding in a wedge shape from the bottom side toward the edge portion in the side wall portion.