摘要 |
PURPOSE:To facilitate change of the installed position of a sail etc. without causing damage thereto by fitting a spring in a groove formed at the outside surface of the lower part of the mast, installing a ring provided with a groove to accommodate a mast detainer pin, and by detaining it on a mast base through said ring without being exposed. CONSTITUTION:A ring 22 to be fitted on a mast base 12 is provided with a No.1 groove 28 stretching in the circumferential direction on the periphery of the ring 22 and No.2, 3 grooves 30, 32 in that position of ring bore as facing in the diametric direction in parallel up and down. The ring 22 is fitted at the bottom of the mast 18 and fitted from above the mast base 12 against the action of a spring 26 so as to accommodate a mast detainer pin 24 in said No.2, 3 grooves 30, 32 at the bore. According to this construction, wherein the pin 24 is not exposed from the ring 22, the sail is free of risk to be damaged, associate with such a merit that mounting and demounting on/from the mast base is attainable simply through a single action.
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