Title:
FIRECRACKER
Document Type and Number:
WIPO Patent Application WO/2017/090188
Kind Code:
A1
Abstract:
[Problem] To more spectacularly present a stage with a small amount of explosive by launching to-be-emitted objects faraway at a wide angle so as to be dispersed in flight. [Solution] This firecracker is constructed by housing, in a cylindrical body having a launch port at the front end, an explosive that explodes through a pulling operation performed on a pulling cord, and to-be-emitted objects arranged between the explosive and the launch port, wherein the launch port of the cylindrical body is covered with a lid member that is to be pushed open by the to-be-emitted objects emitted toward the launch port by receiving an air blast generated during explosion of the explosive. The firecracker is provided with a front-open to-be-emitted object housing bag to be filled with the to-be-emitted objects. The to-be-emitted object housing bag is housed and arranged in front of the explosive inside the cylindrical body, and is installed by integrally binding the forward-located bag opening edge to the launch port edge of the cylindrical body such that the launch port is sealed. The firecracker is provided with a movable pressure receiving body movable in the axial direction of the cylindrical body between the to-be-emitted object housing bag and the explosive. The movable pressure receiving body is provided with: a pressure receiving part formed on the to-be-emitted object housing bag side in the axial direction; and a peripheral wall that stands from the pressure receiving part toward the explosive side and that has a cross-sectional shape matching the inner peripheral shape of the cylindrical body, and is not connected to any member constituting the firecracker. The movable pressure receiving body moves toward the launch port inside the cylindrical body by receiving air pressure from the air blast. When pressure is applied to a bottom part of the to-be-emitted object housing bag through the pressure receiving part, the to-be-emitted object housing bag expands while turning inside out. Then, the movable pressure receiving body and the to-be-emitted objects are pushed out of the cylindrical body. The movable receiving body pushed out of the cylindrical body is then housed in the to-be-emitted object housing bag which has been turned inside out.
Inventors:
OKAMURA SHINYA (JP)
Application Number:
PCT/JP2015/083411
Publication Date:
June 01, 2017
Filing Date:
November 27, 2015
Export Citation:
Assignee:
KANEKO CO LTD (JP)
International Classes:
F42B4/04; F42B4/22
Foreign References:
| JP2007298187A | 2007-11-15 | |||
| JPH08219694A | 1996-08-30 | |||
| JP2005069589A | 2005-03-17 | |||
| JP2004233049A | 2004-08-19 | |||
| JP2003177000A | 2003-06-27 |
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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