PURPOSE: To prevent trouble of endless turning belt driving system such as a motor by turning an endless turning belt in reverse direction when movement of endless turning belt to opposite outside direction by holding the rush seedlings therebetween is larger than definite value. ;CONSTITUTION: When mother stock of rush seedling G is held between endless turning belts 5a and 5b, these endless turning belts are moved to opposite outside direction. When the movement is not less than a definite value sensors S1 and S2 are turned on and a motor M driving the endless turning belt is reversely rotated to return the mother stock of the rush seedling to the end side for starting the conveying.;COPYRIGHT: (C)1994,JPO&Japio
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