Patent ID: 7753436

Claim:
An operator cab for heavy equipment, comprising: an outer sidewall having a doorway formed thereon; upper and lower rails provided on upper and lower portions of the outer sidewall and engaged with upper and lower rollers, respectively; a sliding door being slid by upper and lower rollers that are engaged with the upper and lower rails, respectively, to open or close the doorway; an upper pad formed on an upper bracket which is fixed to an inner surface of the sliding door and on which the upper roller is rotatively mounted; a lower pad formed on a lower bracket which is fixed to the inner surface of the sliding door and on which the lower roller is rotatively mounted; an upper stopper, installed in the opened position of the outer sidewall in which the sliding door is fully opened, for being in surface contact with the upper pad when the sliding door is fully opened, and preventing the sliding door from rocking by pressure of a pad elastically supported to produce a displacement in an X-axis direction when the upper stopper becomes in surface contact with the upper pad; and a lower stopper, installed in the opened position of the outer sidewall in which the sliding door is fully opened, for being in surface contact with the lower pad when the sliding door is fully opened, and preventing the sliding door from rocking by pressure of a pad elastically supported to produce a displacement in the X-axis direction when the lower stopper becomes in surface contact with the lower pad, wherein at least one of the upper and lower stoppers comprises: a case mounted on the outer sidewall, a pad being movably engaged with a guide bar fixed to penetrate the case, and having an upper surface upwardly inclined in a direction in which the sliding door is opened, and elastic members installed on outer surfaces of the guide bar in forward and backward directions of the pad to fix the sliding door by pressing the pad being in surface contact with any one of the upper and lower pads by elastic restoring forces of the elastic members when the sliding door of the elastic member is fully opened, wherein the elastic members are respectively installed on the guide bar in the backward and forward directions of the pad, and wherein the X-axis direction is a forward-backward direction.