| 摘要 |
PURPOSE:To secure engagement within a constant range throughout four seasons with temperature change when a container body and its fitting cap are of different materials having different coefficients of thermal expansion. CONSTITUTION:A container body 1 already having a sealing means and a fitting cap 4 having a side peripheral face 5 being a double cap are made of different materials having coefficients of thermal expansion different from each other, while a ring-like groove 3 is provided on an outer periphery of an upper part of the container. In the fitting cap 4 wherein an upper part of the ring-like groove 3 is the container upper end 2 and engaging claws 6 extending toward the center of the fitting cap 4 engaging with the ring-like groove 3 are intermittently provided on a lower part inside the side peripheral face 5 of the fitting cap 4, a plurality of ribs 7 extending toward the center are extended, with portions contacting the container upper end 2 left, at least around the upper part of the engaging claws 6 on an internal face of the side peripheral face 5 of the fitting cap 4, so that while a space where the container upper end 2 can easily be fitted into is left at the lower end of the ribs 7, a protrusion for assuring engagement is extended. |
