Tool for cutting joint of masonry wall

A tool for cutting joints of a masonry wall which is connected to an electric motor to cut joints in a masonry wall by a predetermined depth, the tool comprising:

• a cutter shank connected to an output end of the electric motor to receive vibration;
• a joint cutter separably coupled at a rear end thereof to the cutter shank, having a cross-section, which has a cutter thickness that is the same as or smaller than a thickness of the joints and a height that is several times larger than the cutter thickness, and having cutter grooves longitudinally formed on both sides in the direction of the cutter thickness to perform cutting and discharge chips of cut joints, thereby showing a cutting ability;
• a connection socket passed over the joint cutter to be positioned at a coupling portion between the cutter shank and the joint cutter;
• and
• a coupling pin inserted in the connection socket and keeping the cutter shank and the joint cutter coupled to each other.