GROOVE PROCESSING APPARATUS

Disclosed herein is a groove processing apparatus of processing a groove having a triangular cross section in a side of a plate material， the groove processing apparatus including: a cutting member cutting the side of the plate material; a first driving part moving the cutting member to first and second positions; and a second driving part moving the cutting member in groove processing directions of the plate material， wherein the first position corresponds to any one of the two sides of the triangular shape having the same vertex and the second position corresponds to the other thereof， the vertex being positioned inside the plate material. A groove processing apparatus which processes a groove having a triangle shaped cross section on a side surface of a plate comprises: a cutting member which cuts a side surface of a plate; a first driving unit which moves the cutting member to a first position or a second position; and a second driving unit which moves the cutting member in a groove cutting direction. Here， the first position corresponds to any one of two sides having the same vertex in the triangle shape， the second position corresponds to the other one of said two sides， and the vertex is located within the plate.