Apparatus for preventing damage of haarow

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PURPOSE : A safety system of a harrow for a tractor is provided to prevent a harrow from being damaged by naturally passing over stones or foreign materials. CONSTITUTION : A safety system of a harrow for a tractor comprises spacing units(400, 500) which are installed in the rear of a harrow board(300) and protrude more than the harrow. The spacing units are located in both sides or auxiliary wing parts(301, 302) of the harrow board or between the harrow boards. A penetrated hinge hole is formed in the bottom of a support bar. In the lower part of the support bar, a support unit is installed.