To provide a sealant injection device which certainly seals a gap between a cylinder member and a plunger member by a simple constitution.
A seal ring 50 is formed into an almost U-shape in its cross-sectional shape and fitted in a fitting insertion groove 48A so that the side (upper side) opened into the U-shape thereof is turned for the outside of the slide direction (H-direction) of the plunger member 48. The outer peripheral part of the seal ring 50 is brought into contact with the inner peripheral surface of a cylinder container 42 under pressure to seal the gap of the outer peripheral surface of the plunger member 48 and the inner peripheral surface of the cylinder container 42. At this time, since the outer peripheral part of the seal ring 50 is brought into contact with the inner peripheral surface of the cylinder container 42 under pressure, and the inner peripheral part thereof is brought into contact with the fitting insertion groove 48A of the plunger member 48, the U-shaped open part is bent and deformed so as to become narrow.
IWASAKI SHINICHI
IZUMIMOTO TAKAHARU
SUGIO DAISUKE
YOSHIDA MAKI
YAMAGUCHI ICHIRO
Kato Kazunori
Katsuichi Nishimoto
Hiroshi Fukuda
Next Patent: SEALANT INJECTION DEVICE