A document transmission apparatus reduces troublesome labor of an operator when transmitting document data, inputted from a scanner or the like, by various transmission methods such as electronic mail, facsimile, remote printing and file transfer. The first transceiver device transmits a visible light signal from an optical transmitter into the proximal end for the fiber optic component to conduct to the distal end. The lever is also joined to the second connector segment body by a fulcrum wall positioned intermediate the ends of the lever, an outwardly facing cam surface is provided on the lever between the fulcrum wall and the base end. The dollies may be employed in a plurality around the shelf and engaged with connector bars between them for a unified movement of the dollies elevating the shelf.