| 摘要 |
PROBLEM TO BE SOLVED: To provide a detachable-lid-type container realizing high sealing performance or the like together with reduction in weight and costs. SOLUTION: An oil filter 1 is constituted mainly of a casing 2, a set plate 3 for covering a lower end of the casing 2, and a lock ring 4 for fastening the set plate 3 to the casing 2. The set plate 3 is press-formed using a steel plate as a raw material. Between the set plate 3 and an inner circumferential surface of the casing 2, an O ring supporting wall 34 for supporting an O ring 11 is erected. The O ring supporting wall 34 is formed by folding back the raw material steel plate in an inverted-U shape repeatedly with the folded-back portions closely contacting with each other (with no gap). Further, a disengagement preventing outward protrusion 34a for preventing the O ring 11 from disengaging is formed at an upper extremity of the O ring supporting wall 34 in an expanding manner. Furthermore, in the set plate 3, an annular protrusion 36 in a metal touch with the seat S when mounting the oil filter 1 is formed by folding back the raw material steel plate in an inverted-U shape with the folded-back portions closely contacting with each other (with no gap). COPYRIGHT: (C)2007,JPO&INPIT
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