PROBLEM TO BE SOLVED: To provide a seedling transplanter where a planting driving shaft is easily drawn out and inserted even when the center of the shaft is in a state of core slippage from the sun gear by assembling the sun gear in a gear transmission mechanism so an not to fall away by a specific method. ;SOLUTION: The purpose is achieved as follows: (1) attaching a planter arm 16, which scrapes and plants seedlings to be transplanted, to the end of a rotary case 9 fixed on a planting driving shaft 10; (2) controlling the posture of the planter arm 16 through the medium of a gear transmission mechanism having a sun gear 11 placed within the rotary case 9, through which the shaft 10 mutually rotatably bores; (3) forming projecting bosses projecting in the direction of the axis of the shaft on both sides of the gear 11; (4) placing boss- supporting parts 15, 9d fixed on the rotary case 9 so as to surround the projecting bosses from their outskirts to prevent the sun gear 11 from falling away when the shaft 10 has been drawn out; (5) forming clearances S1 and S2 between each of the surfaces of external circumferences of the projecting bosses and each of the surfaces of internal circumferences of the boss-supporting parts 15, 9d so as to face each other.;COPYRIGHT: (C)2000,JPO
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