RULER FOR SUPERVISION INCLUDING CUTTING MAT FORMED BY COATING REINFORCING GLASS OR ZIRCONIUM PLATE IN PLASTIC PLATE AND CONNECTING KNIFE IN RULER WITH CONNECTION HOOK

摘要

PURPOSE: A ruler for supervision is provided to conveniently carry and use a knife by forming a harder plate than a plastic and including the knife in the ruler. CONSTITUTION: A coating layer is formed in the pate of a rear ruler(7) without carving a scale by a reinforcing glass or a zirconium plate. A knife(2) for cutting paper is connected with the ruler with a connection hook(3). The one end and the lower part of the ruler are opened. The front surface of the ruler carving the scale has an opened small recessed groove(6). An auxiliary ruler(4) partially overlapped with the opened one end is embedded in the recessed groove. A combining device is formed to relatively fix and combine the overlapped portions of two rulers. The combining device comprises a combining hole and a fixing piece(5). The combining hole is formed in the auxiliary ruler. A combining protrusion to be inserted in the combining hole is formed in the lower part of the combining hole. The upper part of the fixing piece is installed in the upper part of the ruler. The combining device is formed to easily combine and release. In completely unfolding the auxiliary ruler by rotating centering the combining device, two rulers forms a perpendicular. Thereby, the convenience and the efficiency of supervision are offered.