SHEET CONVEYING DEVICE AND IMAGE FORMING SYSTEM

To prevent damage associated with a door closing operation even when a guide plate is at an open position.SOLUTION: An upstream-side closing unit 50 having an upstream-side holding release part 51 and an upstream-side guide part 52 is provided at a position on an inner surface of a front door 120 opposite to an upstream conveying unit 40. When the front door 120 is closed, the upstream-side holding release part 51 comes into contact with the tip of a jamming release lever 41, and thereby an upper guide part 40A is separated from a guide holding body 130. The upstream-side guide part 52 is provided with a retraction member 52a, and in association with closing of the front door 120, the tip of the jamming release lever 41 is brought into contact with the retraction member 52a. The retraction member 52a is pushed by the jamming release lever 41 and rotates toward the front door 120. In this way, the upstream-side closing unit 50 releases the holding of a second guide plate held by the guide holding body 130, and moves the second guide plate to a closed position while retracting so as to prevent the upper guide part 40A from being pushed by the front door 120 and damaged.SELECTED DRAWING: Figure 3 【課題】ガイド板が開位置にあっても、扉の閉動作に伴う破損を抑制する。【解決手段】前扉１２０の内面の上流搬送ユニット４０に対向する位置に、上流側保持解除部５１と上流側案内部５２とを有する上流側閉じユニット５０が設けられる。前扉１２０が閉められる際に、上流側保持解除部５１がジャム解除レバー４１の先端に突き当たることで、上ガイド部４０Ａがガイド保持体１３０から離れる。上流側案内部５２には退避部材５２ａが設けられ、前扉１２０が閉じられることに伴い、ジャム解除レバー４１の先端が退避部材５２ａに突き当てられる。退避部材５２ａはジャム解除レバー４１によって押され、前扉１２０側へ回動する。こうして、上流側閉じユニット５０は、ガイド保持体１３０による第二ガイド板の保持を解除し、上ガイド部４０Ａが前扉１２０に押されて破損しないように退避しながら、第二ガイド板を閉位置へ移動させる。【選択図】図３