| 摘要 |
A sheet feed tray has a bottom plate on which a sheet is to be placed; two side fences for positioning opposite widthwise sides of a sheet placed on the bottom plate; and an interlocking mechanism for interlocking movements of the side fences toward and away from each other. The interlocking mechanism includes two racks integrally attached to the respective side fences with toothed surfaces thereof opposed to each other and movable along the bottom plate, and a pinion provided on the bottom plate. The pinion is rotatable about its central axis and is engageable with the pair of racks. Locking projections are disposed at the respective rack sides and project toward the bottom plate side. Contact portions are disposed at the bottom plate side and engage the locking projections with the pair of side fences maximally or minimally spaced apart from each other.
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