| 摘要 |
PROBLEM TO BE SOLVED: To prevent danger, to eliminate dirt, and to improve ability, by providing a guard in the peripheral part of blades provided in a spindle of a rotary blade. SOLUTION: A guard 3 is provided in the peripheral part of blades 2 provided in a spindle 1 of a rotary blade. With this structure, the guard 3 can be applied for the conventional rotary blade. Stronger flow can be generated by tapering a tip of the cylindrical guard 3. In the case of using this guard 3 for a rotary blade (screw) of a vessel to be rotated at a high speed, generation of danger is eliminated. In the case of using this guard 3 for a ventilating fan or the like, adhesion of lamp black to the blades and making dirty a main body and surroundings due to the scattering of the adhered lamp black can be prevented, and the water and air taken from a front surface is blown without being disturbed, so that noise is little and ability is improved. |
