Automatic section thickness detection device of high-speed roller collating machine

The invention discloses an automatic section thickness detection device of a high-speed roller collating machine. The automatic section thickness detection device comprises a belt pulley. The automatic section thickness detection device is characterized in that a shaft is mounted on the belt pulley; an upper mouth piece and a nylon bracket are mounted on the shaft; a nylon block is mounted on the upper mouth piece; a magnetic rod is mounted on the nylon block; a lower mouth piece is mounted on the nylon bracket; a small hole is formed in the nylon bracket; a sensing copper coil is mounted inside the small hole; an eccentric bolt, a baffle block and a compression spring are further arranged on the belt pulley respectively; the eccentric bolt is positioned on the lower side of the nylon bracket; the baffle block is connected with the nylon bracket through the compression spring. The situations of multi-page, page omission, multi-section and no section can be all precisely detected, unqualified books caused by the above situations can be successfully detected, and the automatic section thickness detection device is simple, rapid and convenient and high in economic benefit.