PRINTING DEVICE OF INSIDE OF PIPE

摘要

PURPOSE:To enable to print automatically letters and marks on the insides of various kinds of pipes, by providing a pipe end detecting sensor and collision preventive sensor on a part of a printing machine body. CONSTITUTION:A printing head PH and pipe end detecting sensor ES are fitted to a printing machine body PS to be fitted to the tip of a multi-joint arm A and a collision preventive CS is fitted further to the tip of them. The above pipe end detecting sensor ES is a device having a function detecting an end part of a pipe P and generating a signal for suspending insertion action by detecting the end of the pipe on the basis of the pipe end. In addition to the above, the collision preventive sensor CS is a device preventing the printing machine body from colliding against the other body as well as the pipe P. As control is performed by receiving information such as the outer diameter and a thickness of the pipe through equipments as above, printing of necessary letters and marks can be performed extremely efficiently and automatically at a predetermined position of the inside of the pipe.