(57) An apparatus for bending a metal sheet (1) comprises a frame (2), a stationary lower
beam (3) with a lower clamp (4), a movable upper beam (5) with an upper clamp (6),
said clamps each having a clamping face for clamping a metal sheet in a working position,
a lower bending beam (7) and an upper bending beam (8) for bending a clamped metal
sheet upwardly and downwardly, respectively, said bending beams each at both sides
being supported rotatably around a corresponding axis in a support plate (9), said
support plates being movably mounted in the frame in such a manner that the lower
or upper bending beam can be moved into a working position, in which its axis is substantially
in the plane of the clamping face of the lower or upper clamp, respectively. Further
a device (12) for holding the metal sheet is provided, said holding device being provided
with a mainly C-shaped frame (13) with a slide (14) movable backwards and forwards
between a front and a back position on a slide bed (15), the legs (17,18) of the C-shaped
frame carrying a lower and upper disc (19,20), respectively, adapted to engage a metal
sheet in a working position. In the front position of the slide the legs of the C-shaped
frame extend between the upper and lower beams and the lower and upper discs adjoin
the clamps.
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