| 摘要 |
PURPOSE:To simply reinforce a case at a low cost without making it large-sized by filling a reinforcing material in a gap between an insertion hole and a fixing tool in the case constituted of a cover and a body fixed together by the fixing tool inserted into the insertion hole. CONSTITUTION:A case is formed with a body 1 and a cover 2, both of them are connected and fixed by a fixing tool 3. The fixing tool 3 is inserted into a fixing tool insertion hole 4 for use. The strong pressure of the are gas generated by the action of a circuit breaker is applied to the case, if there is a gap 6 between the insertion hole 4 and the fixing tool 3, the body 1 is broken at the portion of the gap 6, and the case is broken. The gap 6 is generated by the draft or the like of a mold when the body is molded. Epoxy resin 7 or the like, for example, with sufficient hardness at the ordinary temperature is injected into the insertion hole 4 and fixed, thereby the gap 6 is filled and reinforced. |
