Emergency egress system for a construction machine

摘要

An emergency egress system with an access panel assembly, a latch assembly, a handle assembly, a fixed ladder portion, and a slidable ladder portion, is disclosed. The access panel assembly includes a door panel. The latch assembly and the handle assembly are attached to the door panel. The handle assembly has a holding portion that works in conjunction with the latch assembly that has a wing portion. The holding portion is manipulable to rotate the latch assembly in the locked position to hold the fixed ladder portion and the slidable ladder portion together via the wing portion, which is to maintain the door panel in the closed position. The holding portion is manipulable to rotate the latch assembly to the unlocked position to allow the wing portion to rotate and release the slidable ladder portion for exit.

主权项

1. An emergency egress system for a construction machine including a walkway platform and a cab, the walkway platform is in proximity of the cab, the walkway platform includes a first side attached to the construction machine and a second side opposed to the first side and distant from the cab, the emergency egress system comprising:
an access panel assembly coupled to the walkway platform, the access panel assembly having a frame member and a door panel, the frame member attached to the second side of the walkway platform, the door panel having a first end and a second end, the first end being hinged to the frame member to allow movement of the door panel between an open position and a closed position relative to the walkway platform, the second end being opposed to the first end and structured to define a recess portion between the first side of the walkway platform and the door panel, the second end of the door panel being supported by the walkway platform, wherein the door panel includes a first surface directed towards an exit direction and a second surface proximal to the cab; a latch assembly coupled to the second end of the door panel and to the first surface of the door panel, the latch assembly including a first base member and at least one wing portion, the first base member secured to the first surface of the door panel, the at least one wing portion attached to the first base member and extending therefrom; a handle assembly coupled to the second end of the door panel and the second surface of the door panel, the handle assembly including a second base member and a holding portion, the second base member secured to the second surface of the door panel such that the handle assembly works in conjunction with the latch assembly, the holding portion attached to the first base member and extending therefrom, wherein the holding portion is manipulable to rotate the latch assembly between a locked position and an unlocked position; a fixed ladder portion with a first end accommodated in the recess portion and attached to the first side of the walkway platform in proximity to the cab; and a slidable ladder portion with a first end accommodated in the recess portion and secured to the access panel assembly via the at least one wing portion of the latch assembly, in the locked position, wherein the holding portion is manipulable to rotate the latch assembly in the locked position for holding together the fixed ladder portion and the slidable ladder portion via the at least one wing portion, to facilitate locking the slidable ladder portion in the recess portion and maintaining the door panel in the closed position, wherein the holding portion is manipulable to rotate the latch assembly in the unlocked position to allow the at least one wing portion to rotate to facilitate unlocking of the slidable ladder portion for exit from the machine and facilitating the door panel in the open position.