Abstract: A liquid-pressure control device includes a switching valve, a manipulation valve, a first back pressure output mechanism, and a second shuttle valve. When a manipulation lever is manipulated, the manipulation valve outputs a first output pressure corresponding to a manipulation amount of the manipulation lever. When a predetermined operation state is satisfied, the first back pressure output mechanism outputs a first back pressure. The first output pressure is input as a first pilot pressure to the switching valve, and the first back pressure is input as a second pilot pressure to the switching valve. The switching valve supplies a liquid pressure to a boom cylinder at a flow rate corresponding to a differential pressure between the first and second pilot pressures.

Abstract: In order to obtain great damper effects with a comparatively simple structure and fully control a hunting phenomenon, a pilot valve comprises push rods attached to a valve body, spools attached to spools holes of the valve body, spring bearing members provided in spring chambers of the valve body, first spring members provided between the valve body and the spring bearing members, second spring members provided between the spring bearing members and the spools, and an operation level for pressing the push rods. A fluid chamber is provided on an outside of one of ends of each of the spool holes. The fluid chamber communicates with a drain passage through a throttle passage having a throttle portion.

Abstract: The invention provides a cheese transporting processing apparatus for classifying cheeses wound up by winders or the like for different types and packing and carrying out the thus classified cheeses. When a cheese is transported by an overhead conveyor with a type identifying unit, information of a type of the cheese is written into the type identifying unit. In accordance with such type information, cheeses are stocked for different types into a cheese stocker. In response to a demanding instruction from a packing line, cheeses of a specified type are discharged from the cheese stocker and boxed and packed. Such sequence of operations is performed automatically on the cheese transporting processing apparatus.