Bending machine, in particular a press brake, with a safety system

A bending machine or a press brake, comprising:

• an upper beam and a lower beam, wherein the upper beam is movable in a working direction of the bending machine or the press brake relative to the lower beam, in order to form a workpiece configured to be inserted between the upper beam and the lower beam via a front side of the bending machine or the press brake, by bending along a bending line, which extends in a width direction of the bending machine or the press brake,
• a safety system comprising a first optical safety element and a further optical safety element configured to monitor a safety area between the first optical safety element and the further optical safety element and between the upper beam and the lower beam, and wherein the safety system is configured and arranged to follow the movement of the upper beam in the working direction,
• wherein the first optical safety element and the further optical safety element are arranged mechanically connected to one another via a flexible tractive force transmission means and an adjustment device configured to change the position of the functional elements,
• wherein the adjustment device further comprises a coupling section configured and arranged to be movably guided in the working direction, coupled to the flexible tractive force transmission means in order to convert a movement of the coupling section into a movement of the flexible tractive force transmission means, which causes a path identical change in position of the optical safety elements in the working direction relative to the upper beam,
• wherein the adjustment device is a manual adjustment device configured such that movement of the coupling section is effected via a mechanical application of force by an operator, where the adjustment device comprises a tension-proof adjusting element comprising a handle which is connected in the interior of the bending machine or the press brake to the coupling section located there, and
• wherein the tension-proof adjusting element is arranged to extend from the interior of the bonding machine through a body part of the bending machine to the exterior of the bonding machine connecting to the handle, the handle being accessible from the exterior of the bending machine or the press brake, and
• wherein the flexible tractive force transmission means is configured and arranged to be guided on the rear side of the upper beam facing away from the front side of the bending machine or the press brake.