Imprinting mechanism capable of preventing imprinting rubber roll from automatically ascending for intaglio printing press

The utility model provides an imprinting mechanism capable of preventing an imprinting rubber roll from automatically ascending for an intaglio printing press. The imprinting mechanism comprises a rack, a control device, imprinting rubber rolls, a plate cylinder, two imprinting rubber roll shaft sleeves, two basic point bearings and two cylinders, and is characterized by further comprising two detection mechanisms and two standby cylinders, wherein piston shafts of the two standby cylinders are respectively connected with the upper sides of the front ends of the two basic point bearings; the two detection mechanisms are used for respectively detecting the positions of the two imprinting rubber rolls and sending detection signals; the control device is used for receiving the detection signals and respectively controlling the two standby cylinders to ascend and descend. Compared with the prior art, the imprinting mechanism has the beneficial effects that the detection mechanisms and the standby cylinders are additionally arranged, so that a new pressure can be automatically applied to the imprinting rubber rolls when the imprinting rubber rolls ascend, and thus the imprinting rubber rolls are prevented from automatically ascending; an alarm device is additionally arranged, so that when the imprinting rubber rolls ascend, the alarm device can automatically give out an alarm so as to remind machine operating personnel of maintenance.