| 摘要 |
PURPOSE:To simplify structure and reduce the dimension of the device by installing an engaging means which is engaged with a selecting means at a prescribed position to which the selecting means is transferred, for each shift fork, and permitting the selecting operation only by the transfer of the selecting means in a prescribed direction. CONSTITUTION:When an engaging shaft 15 is turned by the transfer of a driving member, and an engaging projection 14 and an engaging groove 19b are engaged, the 3rd-4th speed is selected, and when a selecting rod 11 is retreated by ltoward selection, and the projection 14 is turned counterclockwise by an angle theta, the projection 14 is engaged with an engaging groove 18b, and the shift operation to the 5th-6th speed is permitted by transferring a shift rod 9 in a prescribed direction. When the rod 11 is advanced by +l towards selection, and the projection 14 is turned clockwise by +theta, the projection 14 is engaged with an engaging groove 20b, and the shift operation of the 1st-2nd speed is permitted by transferring the rod 9 in the prescribed direction. Further, when the projection 14 is turned clockwise by +2theta by advancing the rod 11 by +2l, the projection 14 is engaged with a groove 22b, and the retreat shift is secured in the simple ways by the transfer of the rod 9.
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