A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
LEVER DEVICE AND WORKING MACHINE
A lever device (70) includes a movable bracket (72) and a lever (73) which are supported on a support shaft (77) provided on a base (71) such that the movable bracket (72) and the lever (73) are pivotable between a lowered position (P1) and a raised position (P2), at least one first engagement portion (86) provided on the movable bracket (72), at least one second engagement portion (88) provided on the lever (73), a cam member (81) attached to the support shaft (77) such that the cam member (81) is movable in a direction of an axis of the support shaft (77) but not rotatable about the support shaft (77), and a biasing member (92) to bias the cam member (81) in a direction that allows the cam member (81) to engage with the at least one first engagement portion (86) and the at least one second engagement portion (88), wherein the at least one first engagement portion (86) is configured to, when the movable bracket (72) and the lever (73) are in the lowered position (P1) and when the movable bracket (72) and the lever (73) are in the raised position (P2), engage with the cam member (81) to restrict the movable bracket (72) from pivoting, and the at least one second engagement portion (88) is configured such that, when the lever (73) is caused to pivot upward from the lowered position (P1) or pivot downward from the raised position (P2), the at least one second engagement portion (88) disengages the cam member (81) from the at least one first engagement portion (86).
LEVER DEVICE AND WORKING MACHINE
A lever device (70) includes a movable bracket (72) and a lever (73) which are supported on a support shaft (77) provided on a base (71) such that the movable bracket (72) and the lever (73) are pivotable between a lowered position (P1) and a raised position (P2), at least one first engagement portion (86) provided on the movable bracket (72), at least one second engagement portion (88) provided on the lever (73), a cam member (81) attached to the support shaft (77) such that the cam member (81) is movable in a direction of an axis of the support shaft (77) but not rotatable about the support shaft (77), and a biasing member (92) to bias the cam member (81) in a direction that allows the cam member (81) to engage with the at least one first engagement portion (86) and the at least one second engagement portion (88), wherein the at least one first engagement portion (86) is configured to, when the movable bracket (72) and the lever (73) are in the lowered position (P1) and when the movable bracket (72) and the lever (73) are in the raised position (P2), engage with the cam member (81) to restrict the movable bracket (72) from pivoting, and the at least one second engagement portion (88) is configured such that, when the lever (73) is caused to pivot upward from the lowered position (P1) or pivot downward from the raised position (P2), the at least one second engagement portion (88) disengages the cam member (81) from the at least one first engagement portion (86).
LEVER DEVICE AND WORKING MACHINE
HEBELVORRICHTUNG UND ARBEITSMASCHINE
DISPOSITIF DE LEVIER ET ENGIN DE CHANTIER
HATTA KAZUYUKI (author) / NISHIGORI YOICHI (author)
2024-05-01
Patent
Electronic Resource
English