for the mowing machine equipped with a safety plate to protect the cutter is provided at the bottom of the cutter safety plate In the impact absorbing device, and the upper part of the safety plate support member for the formed on the top of the safety plate for supporting the cutter, the bottom for supporting the safety plate is coupled to the safety plate support member of the upper Safety a plate support member, in is configured, the inner periphery of the safety plate through hole, the rotation of the safety plate is formed on the outer periphery of the upper part of the safety plate support member or bottom of the safety plate supporting member so as to correspond to each other providing a suppressing means, the rotation prevention plate for fixing the handle to prevent rotation of the safety plate support member of the lower, in the impact absorbing device for a mower safety plate, characterized in that it is constructed shock be those, which according to the invention, a safety plate rotation suppressing means is formed of a safety plate, the upper part of the safety plate support member or bottom of the safety plate support member, the cutter is produced by striking a foreign object for When is transmitted to the safety board, as well as over the elastic projections momentarily groove of the rotation suppressing means to correspond to each other, safety plate is made to rotate in the direction in which the shock is applied, thereby absorbing the shock, foreign matters become popping, it is very useful to be able to prevent the cutter or the safety plate is damaged.BACKGROUND 2カッターの下部に設けられてカッターを保護するための安全板を備える草刈機用安全板の衝撃吸収装置において、前記安全板の上部に形成されてカッターを支持するための上部の安全板支持具と、前記上部の安全板支持具に結合されて安全板を支持するための下部の安全板支持具と、で構成され、前記の安全板の通孔の内周と、上部の安全板支持具または下部の安全板支持具の外周に形成されて互いに対応するようにする安全板の回転抑制手段と、前記下部の安全板支持具の回転を防止するためにハンドルに固定するための回転防止台と、で構成されたことを特徴とする草刈機用安全板の衝撃吸収装置を提供するためのものであって、本発明は、安全板の回転抑制手段が形成された安全板と、上部の安全板支持具または下部の安全板支持具により、カッターが異物とぶつかることによって発生する衝撃が安全板に伝えられると、瞬間的に回転抑制手段の凹溝が互いに
