Automatic wet sanding apparatus

An automatic wet sanding apparatus that performs automatic wet sanding in which sandpaper is pressed against a painted surface of a painted object that has been painted and the sandpaper is moved with water flowing between the sandpaper and the painted surface to sand down the painted surface,

• the automatic wet sanding apparatus comprising an automatic wet sanding unit and a paper peeling unit, wherein:
• the automatic wet sanding unit includes a metal disc and a cushion pad which moves integrally with the disc and is made of a soft material and on which the sandpaper is detachably mounted;
• the paper peeling unit includes a clamping shaft and a clamping hook disposed close to an outer circumferential surface of the clamping shaft, and is configured such that the sandpaper is removed from the cushion pad as the automatic wet sanding unit is moved with the sandpaper caught between the clamping shaft and the clamping hook;
• an outer circumferential end of the disc is located on an outer circumferential side relative to a position of an outer circumferential end of a paper mounting surface of the cushion pad on which the sandpaper is mounted;
• and
• the clamping hook has a leading end surface that faces an outer circumferential surface of the cushion pad, and the leading end surface is shaped such that, in a paper peeling step by the paper peeling unit, the leading end surface comes into contact with the outer circumferential end of the disc before coming into contact with the outer circumferential surface of the cushion pad, or comes into contact with the outer circumferential end of the disc at the same time as coming into contact with the outer circumferential surface of the cushion pad.