Patent ID: 8439409

Claim:
A door unit for a hydraulic excavator comprising: a door panel attached to a frame provided at a machine side of the hydraulic excavator to close towards and open away from the frame; a striker provided on the frame so as to protrude therefrom, the striker provided at such a location as to correspond to a distal end of the door panel; and a latching mechanism that is provided on the door panel and has a latch plate which removably engages the striker; wherein the striker comprises: a pair of vertically arranged mounting base portions fixed to the frame by a bolt respectively; a pair of vertically arranged slanted shimmy-stopping surface portions that are disposed on these mounting base portions towards the latching mechanism so as to form a V-shaped striker; a flat end portion that is provided between ends of the vertically arranged slanted shimmy-stopping surface portions; and a metal hooking portion which is attached to the flat end portion and is adapted to be inserted into the latching mechanism; and wherein the latching mechanism comprises: a mounting plate attached to a surface in the vertical direction of the door panel so as to face the striker; a pair of main body plates attached to the mounting plate so to form vertical panels and parallel to each other to rotatably support the latch plate; a latching groove portion having a U-shape, formed at the vertically arranged main body plates by cutting away so as to collectively form a V-shape from a side opposite the striker and adapted to engage the metal hooking portion of the striker; and a pair of vertically arranged shimmy-suppressing portions vertically arranged in a V-shape and formed by bending outward a part of each of the main body plates, provided at an open end of the latching groove portion, and fit the vertically arranged slanted shimmy-stopping surface portions of the striker; wherein a receiving groove disposed at the latch plate to receive the metal hooking portion of the striker rotates in accordance with an inserting movement of the metal hooking portion from an angle at which the receiving groove is released to the open end of the U-shaped latching groove portion, and the latching groove portion is disposed at a place where the receiving groove is closed.