Mowing cutter unit for mower

A mowing cutter unit for a mower comprising a rotary cutter and a stationary cutter coaxially overlapped to each other, wherein said rotary cutter is formed with recessed cutting portions each being curved in an approximately doglegged shape toward a rotational direction, and said stationary cutter is formed with a plurality of projecting cutting portions each having an approximately angular shape to be slidably contacted with said recessed cutting portions of said rotary cutter respectively;

• wherein said rotary cutter is formed in a polygonal shape in plan view having rising-up portions formed around a whole peripheral edge, each of said recessed cutting portions is formed at each vortex portion at which said rising-up portions are crossed to each other;
• wherein each of said recessed cutting portions is formed to be curved in an approximately doglegged shape in such a manner that a grass taking-in portion extending from a central curved portion to a cutting leading edge is directed in the rotational direction of said rotary cutter and a grass pushing-out portion continuous from the central curved portion to the rising-up portion is directed to the outside;
• wherein said recessed cutting portion is formed such that it is positioned ahead of a radial line passing from the rotational center of said rotary cutter to the central curved portion in the rotational direction of said rotary cutter, wherein said grass pushing-out portion crosses the radial line at acute angles;
• wherein each of said projecting cutting portions is formed in such a manner that it is shaped in a loosely circular arc from a cutting base to a cutting leading edge, and a crossing angle at which said projecting cutting portion is rubbed with a grass pushing-out portion of said recessed portion formed on said rotary cutter is larger than a crossing angle at which it is rubbed with a grass taking-in portion of said recessed cutting portion.