| 摘要 |
PURPOSE:To facilitate to keep the angle of a lateral vane by a method wherein a central bearing structure is combined with ratchet pawls in case the lateral vane is long in the lengthwise direction thereof and is to be divided at the center thereof. CONSTITUTION:Divided lateral vanes 3 are inserted into the lateral vane inserting section 16 of a connecting member 5 to integrate them. A holding member 6 is inserted into the gap 18 of the connecting member, an U-groove 9 is abutted against a shaft 15 and the holding member 6 is forced into the long hole notch 12 of a bearing member 11. The stopper 7 of the holding member 6 is fitted into a square hole 13 for the stopper. The U-groove 9 and the long notch 12 constitute a circular section after assembling and become the bearing section of the shaft 15. The ratchet pawls 8 of the holding member 6 and protected and recessed section 14, formed on the circumference of a semi-circular section 17 for the connecting member 5, are arranged concentrically with the bearing section while the tip ends of the ratchet pawls 8, provided with the property of a spring, are pinched slightly by the recesses of the protruded and recessed section 14. Accordingly, the integrated lateral vanes 3 may be held in any arbitrary angle within an angle alpha deg. in accordance with the number of pitches of the protruded and recessed section 14.
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