POSITIONING MECHANISM OF LIQUID DROPLET EJECTION HEAD, LIQUID DROPLET EJECTION APPARATUS, IMAGE FORMING APPARATUS, AND METHOD FOR POSITIONING AND REPLACING LIQUID DROPLET EJECTION HEAD

摘要

PROBLEM TO BE SOLVED: To provide a positioning mechanism of a liquid droplet ejection head, which is capable of ensuring nozzle arrangement with high accuracy.SOLUTION: The positioning mechanism has: an ejection head 17 with a reference plane 19 arranged at an orthogonal side; a head mounting member 15 with an abutment part 25 of the reference plane 19; and a head pressing-sliding jig 21 for pressing the reference plane 19 to the abutment part side. The head pressing-sliding jig 21 has a conical part 26, and by screwing in the head pressing-sliding jig 21, the liquid droplet ejection head 17 is fixed to the head mounting member 15, while being sandwiched between the conical part 26 and the abutment part 25.