Patent ID: 7575272

Claim:
A construction machine comprised of an automotive vehicular lower structure, and an upper revolving structure rotatably mounted on said vehicular lower structure and having a cab built on a frame and covering a lower side of said cab with a side cover; said cab being constituted by a hollow cab box having five vertically extending pillars including a left front pillar, a right front pillar, a left center pillar, a left rear pillar and a right rear pillar, and five side sections between said pillars including a front side section, a left front side section, a left rear side section, right side section and a rear side section, and a door openably or closeably fitted between said left front pillar and said left center pillar, characterized in that; said door is a folding type door comprised of a first door panel pivotally supported on said left center pillar of said cab box by use of door hinges and a second door panel foldably and freely connected to said first door panel by use of intermediary hinges whereby said first and second panels form a substantially continuous arc and are freely movable with respect to each other during folding movement; said folding type door being located substantially in the same vertical plane as said side cover; a first holder member is attached to said first door panel and a separate second holder member is attached to said second door panel retaining said folding type door in an open door position when said folding type door is opened; and said left rear side section of said cab box being provided with two catch members located in spaced fore and rear positions to be attachably or detachably engaged with said first and second holder members when said folding type door is in an open door position.