| 摘要 |
Opening/closing mechanisms for an image formation apparatus is provided to facilitate operations for exchange of, e.g., a fixing unit and paper jam. To exchange the fixing unit, a releasing lever 99a allows a pressing strip 55 to pivot a contact maker 67 of the first opening/closing mechanism X1 and pivot a pivoting member 65. Thus, a contact pad 71 can release an upper coupling strip 61 from a pin 62 of an intermediate frame 23, and an upper frame 24 can be independently opened. To remove a jammed paper, a switch lever 103b allows the pressing strip 55 to move horizontally. Thereafter, the pressing strip 55 is contacted with a lower releasing strip 54 of the second opening/closing mechanism X2 in response to operation of the releasing lever 99a. Thus, an engaging member 83 is released from a pin 81 of a lower frame 21 so that the upper frame 24 is released from the intermediate frame 23. Further, the contact maker 67 of the first opening/closing mechanism X1 is lowered by a spring 74, and transferred below a movement locus of the pressing strip 55. Therefore, the intermediate frame 23 never drops even if the releasing lever 99a is operated.
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