Self-propelled working machine

A self-propelled working machine (1) comprising:

• moving means (2) which allows movement of the machine on a bearing plane (3),
• propulsion means (4) operatively connected to the moving means and effective to cause and maintain the movement of the working machine on the bearing plane,
• a frame (5) supporting the moving means and the propulsion means,
• at least one operating member (6) and actuating means connected thereto, said operating member and said actuating means being supported by the frame (5),
• a maneuver cab (7) supported by the frame (5) and comprising at least an access door (8), and
• wherein said maneuver cab (7) and said frame (5) define an encumbering volume of the machine,
• wherein the machine (1) comprises a step board (11) arranged at the access door (8) of the maneuver cab (7) and coupling means (13, 17) operatively connected to the maneuver cab (7) or to the frame (5) of the working machine for supporting said step board (11), said coupling means allowing an actuation movement of said step board (11) between a retracted position in which said step board (11) remains substantially inside said encumbering volume, and an extracted position in which it protrudes, thereby defining a supporting surface, walkable by the operator, able to facilitate entering the cab (7);
• wherein the machine (1) comprises actuation means (17) operatively connected to said step board (11) and suitable for imposing said actuation movement to the step board (11) via which said step board is brought from the retracted position to the extracted position thereof in conjunction with the opening of the maneuver cab's access door and from the extracted position to the retracted position thereof in conjunction with the closing of the maneuver cab's access door (8);
• wherein the actuation means comprises at least one connection element operatively interposed between said step board (11) and said access door (8) so that the step board (11) is solidly constrained with the access door (8), in such a way that the opening/closing of the access door (8) generates the actuation movement of the step board (11);
• wherein said connection element comprises an arm (17) having a first portion (17a) secured to the access door (8) or provided in a single piece with the access door (8) and a second portion (17b) secured to the step board (11) or provided in a single piece with the step board (11);
• and
• wherein said access door (8) is hinged to a structure of the maneuver cab by means of at least one hinge (9) and wherein said first portion (17a) of the arm (17) is fixed to a rotational portion (9a) of said at least one hinge arranged at the access door (8).