The invention discloses a semi-automatic bookblock
rounding machine which comprises a rack, a
rounding mechanism, a transferring track and a book output mechanism, wherein the transferring track, the
rounding mechanism and the book output mechanism circularly operate under the control of a sensor, a book is transferred by the transferring track to the rounding mechanism, a slide block device drives rounding rollers to clamp the book, a worm and gear structure drives the two rounding rollers to rotate oppositely to round the book, the book output mechanism clamps the rounded book through a pneumatic finger to the book
output device, and the operation is repeated. According to the roller type rounding principle, the advantages of
machine,
electricity and air are fully used, so that the complex working principle is achieved on the basis of simplifying the mechanical structure of the whole
machine, the machine can round 15 books at the most in one minute, an advanced PLC (Programmable
Logic Control) automatic program is adopted for control, the size of a rounding arc on a bookblock is digitally processed, so that an author can conveniently and intuitively regulate the rounding arc of the book, and the rounding requirements of the books with different thicknesses can be well met.