| 摘要 |
PROBLEM TO BE SOLVED: To provide a flight rubber balloon in which no mouth hole member is detached when a strong force is imparted thereto.SOLUTION: A flight rubber balloon includes: a rubber balloon body 2; an upper body 20 which has an opening provided in both upper and lower sides, which has a first engaging salient 24 projectingly provided outward on a peripheral side wall, and which has a fall-off prevention projection 23 projectingly provided outward on the upper side from the first engaging salient on the peripheral side wall; and a bottom body 30 which has an opening provided in both upper and lower sides, and which has a second engaging salient 34 projectingly provided inward on the peripheral side wall. The peripheral side wall 35 of the bottom body is externally fitted to the peripheral side wall 25 of the upper body. By engagement of the first engaging salient 24 with the second engaging salient 34, the upper body and the bottom body are integrally fitted to each other. The mouth part 2a of the rubber balloon body is housed inside an acceptance space 26 below the fall-off prevention projection between the peripheral side wall of the upper body and that of the bottom body. As a gap between the fall-off prevention projection 23 and the peripheral side wall 35 of the bottom body is smaller than the outer diameter of the mouth part 2a, it prevents the mouth part 2a from falling off. |
