(57) A work adjustable positioning mechanism (18) is disposed between a loading stage
(15) arranged near the front end portion of the work feeder (3) and an entrance portion
of the transferring unit (10), which comprises a pair of bracket bearings (20, 20)
disposed at the opposite sides of the loading stage (15); a slide bar (21) supported
on each end by the respective bracket bearings whereby the slide bar extends lengthwise
perpendicular to the travel of the sheet material (2) loaded into the loading stage
(15) towards the transferring unit (10); and a pair of sliding contactors (26, 26)
supported on the slide bar (21), each of which is configured to be slidable in horizontal
directions and extends crossways perpendicular to the length of the slide bar, wherein
as a sheet material (2) from the work feeder (3) advanced into a space between the
sliding contactors rested apart on the slide bar (21) in a determined position, both
sliding contactors being slid inward simultaneously to approach to each other and
brought to bear on each lateral side of the loaded sheet material (2), at which position
those sliding contactors are stopped sliding at the same time, the position of the
loaded sheet material (2) relative to a determined loading section of the transferring
unit (10) is locked by releasing activation of those sliding contactors (26) so that
the located sheet material (2) is loaded into the transferring unit (10) as it is.
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