PROBLEM TO BE SOLVED: To provide a sub-boom device of a vehicle for high lift work that can ensure support strength of a sub-boom member with a simple structure.SOLUTION: In a sub-boom device 60, a sub-boom support member 80 comprises a first support member 81 provided swingably about a swinging shaft part 71 extending horizontally in a vertical surface with respect to a revolving member 70, and a second support member 86 provided relatively rotatably around a rotary shaft part 89 extending orthogonally to the swinging shaft part 71 between an operating rotational position and a stored rotational position with respect to the first support member 81. A state where a sub-boom member 90 can be supported by both the first support member 81 and the second support member 86 and a state where the sub-boom member 90 can be supported by only the second support member 86 can be selectively switched according to the relative rotational position of the second support member 86 with respect to the first support member 81.

    【課題】サブブーム部材の支持強度を簡単な構造で確保できる高所作業車のサブブーム装置を提供する。【解決手段】サブブーム装置60において、サブブーム支持部材80は、水平方向に延びる揺動軸部71を中心に旋回部材70に対して垂直面内で揺動可能に設けられた第1支持部材81と、揺動軸部71と直交する方向に延びる回転軸部89を中心に第1支持部材81に対して作業回転位置と格納回転位置との間で相対回転可能に設けられた第2支持部材86とを備え、第1支持部材81に対する第2支持部材86の相対回転位置に応じて、サブブーム部材90を第1支持部材81および第2支持部材86の両方で支持し得る状態と、サブブーム部材90を第2支持部材86のみで支持し得る状態とに選択的に切り替えが可能である。【選択図】図5


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    Title :

    SUB-BOOM DEVICE OF VEHICLE FOR HIGH LIFT WORK


    Additional title:

    高所作業車のサブブーム装置


    Contributors:

    Publication date :

    2015-12-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last



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