| 摘要 |
PROBLEM TO BE SOLVED: To improve operation efficiency of mowing by solving troubles associated with attachment and detachment of cutting blades in a linking mechanism of a cutting blade stay of the cutting blades of a mower, as there have been problems disturbing mowing workability, e.g., conventionally, the cutting blade stay cannot be attached and detached without using specific tools because of special shapes of parts, the attachment of the parts is sometimes missed or forgotten, because there are a lot of and complicated parts, and so forth. SOLUTION: In linking the cutting blade stay with the cutting blade, the edges of a wrench are not affected even though the periphery of a junction unit is abraded by using a junction unit prepared by forming a screw or a screw hole on one side, forming an almost polygonal hole engaging with an almost polygonal rod shaped wrench, or an almost polygonal hole having grooves on a counter face on the axis of the screw or the screw hole. Therefore, the linking mechanism is brought to be simple and excellent in attachment and detachment workability by omitting nut covers that have been conventionally used. In addition, rotation resistance of the cutting blades is reduced by removing the nut covers and the efficiency of reaping operation is enhanced. COPYRIGHT: (C)2008,JPO&INPIT
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