To provide a telescopic boom suppressed from becoming large and having grease appropriately supplied to a slide plate.SOLUTION: This telescopic boom comprises a plurality of boom cylinders, and a slide plate is installed between a first boom cylinder which is one of the boom cylinders of stages other than a first stage and a second boom cylinder which is adjacent to the outer peripheral side of the first boom cylinder. The slide plate moves along a longitudinal direction with the first boom cylinder. The second boom cylinder is adjacent from the inner peripheral side and a second laminate plate is adjacent from the outer peripheral side to a flow path formed in a first laminate plate. In a second laminate, a flow-in hole for opening the flow path toward the outer peripheral side is formed. In the second boom cylinder, a discharge hole for opening the flow path toward the inside of the second boom cylinder is formed. The discharge hole faces the moving locus of the slide plate from the outer peripheral side.SELECTED DRAWING: Figure 6

    【課題】大型化が抑制されるとともに、スライド板にグリースが適切に供給される伸縮ブームを提供すること。【解決手段】伸縮ブームは、複数のブーム筒を備え、初段以外のブーム筒の1つである第1のブーム筒と第1のブーム筒の外周側に隣接する第2のブーム筒との間に、スライド板が設置される。スライド板は、第1のブーム筒と一緒に長手方向に沿って移動する。第1の積層板に形成される流路には、第2のブーム筒が内周側から隣接し、第2の積層板が外周側から隣接する。第2の積層体には、流路を外周側へ向かって開口させる流入孔が形成される。第2のブーム筒には、流路を第2のブーム筒の内部に向かって開口させる吐出孔が形成され、吐出孔は、スライド板の移動軌跡に対して外周側から対向する。【選択図】図6


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    Title :

    CONSTRUCTION MACHINE TELESCOPIC BOOM AND CONSTRUCTION MACHINE


    Additional title:

    建設機械の伸縮ブーム及び建設機械


    Contributors:

    Publication date :

    2022-02-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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