To provide a film stretching structure facilitating installation work of a film member.
The film stretching structure 1 includes a first case 2 including a first tube part 20, a second case 3 including a second tube part 30, and a film member 4 installed at a part between the first tube part 20 and the second tube part 30. The film member 4 is attached between the first tube part 20 and the second tube part 30 with tension T applied thereon. After the attachment, the film member 4 includes a gripped part B gripped by a gripping part A demarcated between the first tube part 20 and the second tube part 30, a non-stretched part C disposed at an outside of the gripped part B, and a stretched part D disposed at an inside of the gripped part B and stretched in a surface direction to a natural state. The film member 4 is prevented from falling off from the part between the first tube part 20 and the second tube part 30 by making use of a fact that the non-stretched part C does not easily pass through the gripping part A from the outside to the inside.
COPYRIGHT: (C)2010,JPO&INPIT
ITO HIROAKI
KAKU SHIKETSU
FURUTA TAKUYA
Shindo Motoko