PURPOSE: To perform different operations of a work machine by using a single operating lever doing plural works and placing at normal position or backward a support base for the lever.
CONSTITUTION: A support base 4 for mounting a single lever of joystic type, 2, for operating both a blade and a ripper is mounted on a stand 7 on the right side of a driver's seat 1. The support base 4 is connected in its lower end rotatably to the stand 7 on the right side through a pin 10. When the support base 4 is at normal position, a change-over valve 16 is at a (B) position via a position detection device 14B, so that pressure oil flows into a blade cylinder 20 from a pump 15 through a controlvalve 17B operated by the single lever 2. When the support base 4 is at a backward, inclined position, the change- over valve 16 is at a (R) position via a position detection device 14R, so that pressure oil flows into a ripper cylinder 21 from the pump 15 through a control valve 14R operated by the single lever 2. Blade operating state or ripper operating state is displayed by a monitor 19.
YAMAMOTO SHIGERU
NISHIDA SATORU
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