Abstract: A slide guide apparatus of a press machine, which guides reciprocating motion of a slide of the press machine by a sliding surface provided between a guide member and the slide, wherein a slide member that is rotatable about a predetermined rotation center axis and a slide member holder that rotatably holds the slide member and is rotatable about a rotation center axis transverse to the predetermined rotation center axis are provided between the guide member and the slide, and a flat portion of the slide member is adapted to function as the sliding surface.

Abstract: A slide guide apparatus of a press machine, which guides reciprocating motion of a slide of the press machine by a sliding surface provided between a guide member and the slide, wherein a slide member that is rotatable about a predetermined rotation center axis and a slide member holder that rotatably holds the slide member and is rotatable about a rotation center axis transverse to the predetermined rotation center axis are provided between the guide member and the slide, and a flat portion of the slide member is adapted to function as the sliding surface.

Abstract: Guide posts that guide the elevating motion of a slide also serves as the guide means for the elevating motion of a bolster. A bolster elevation drive means consists of a hydraulic cylinder. The top of the hydraulic cylinder is connected to the bottom of the bolster. For maintenance and inspection of the dies, the bolster is lowered to open a space between the upper die and the lower die. During operation of the press, the bolster is supported by hydraulic pressure trapped in the hydraulic cylinder.

Abstract: A clutch-brake system in which at least one of clutch and brake devices has the following structure. A friction plate is mounted on a drive shaft to be synchronously rotatable on the drive shaft, but not to be movable in an axis direction of the drive shaft. First and second discs are provided on the opposite sides of the friction plate in the axis direction of the drive shaft, and movable in the axis direction. The first and second discs are synchronously moved in the opposite directions along the axis of the drive shaft, enabling to selectively switch between an operation state and a non-operation state.

Abstract: A suspension mechanism is formed as a liquid-tight structure by fitting the bottom end of a female screw member using a liquid-tight sealing member provided between a slider and a retainer and by covering the retainer with the liquid-tight sealing member. A highly-pressurized liquid is initially supplied to each clearance formed between any components such as liquid-tight sealing member, female screw member, male screw member and retainer through a liquid supply passage formed through the liquid-tight sealing member. The highly-pressurized liquid is supplied by an amount flows out through the screwing portions between the male and female screw members to maintain the pressure of liquid within the liquid-tight structure in a predetermined range.

Abstract: Guide posts that guide the elevating motion of a slide also serves as the guide means for the elevating motion of a bolster. A bolster elevation drive means consists of a hydraulic cylinder. The top of the hydraulic cylinder is connected to the bottom of the bolster. For maintenance and inspection of the dies, the bolster is lowered to open a space between the upper die and the lower die. During operation of the press, the bolster is supported by hydraulic pressure trapped in the hydraulic cylinder.

Abstract: A suspension mechanism is formed as a liquid-tight structure by fitting the bottom end of a female screw member using a liquid-tight sealing member provided between a slider and a retainer and by covering the retainer with the liquid-tight sealing member. A highly-pressurized liquid is initially supplied to each clearance formed between any components such as liquid-tight sealing member, female screw member, male screw member and retainer through a liquid supply passage formed through the liquid-tight sealing member. The highly-pressurized liquid is supplied by an amount flows out through the screwing portions between the male and female screw members to maintain the pressure of liquid within the liquid-tight structure in a predetermined range.

Abstract: A clutch-brake system in which at least one of clutch and brake devices has the following structure. A friction plate is mounted on a drive shaft to be synchronously rotatable on the drive shaft, but not to be movable in an axis direction of the drive shaft. First and second discs are provided on the opposite sides of the friction plate in the axis direction of the drive shaft, and movable in the axis direction. The first and second discs are synchronously moved in the opposite directions along the axis of the drive shaft, enabling to selectively switch between an operation state and a non-operation state.

Abstract: A device for adjusting eccentric value at an eccentric portion of crank shaft in press machine having: a main portion at the crank shaft rotatably supported by a frame; an eccentric portion having an axis eccentric from that of the main portion and adapted to be coupled into a connecting member of the press machine, the main portion and the eccentric portion being capable of leaving from each other along the axis of the crank shaft; connecting means provided at a connecting portion where the main portion and the eccentric portion contact with each other for connecting the main portion with the eccentric portion so that eccentric value of the eccentric portion from the main portion can be altered; and drive means for moving the connecting means.

Abstract: A press machine slide stroke adjusting apparatus comprises an eccentric sleeve connected to a slide and fitted over a circular eccentric portion of a crank shaft, first teeth provided on the eccentric sleeve and concentric to the circular eccentric portion, a main gear disposed on the crank shaft in coaxial relationship therewith, and second teeth meshing with the first teeth and provided on main gear coaxially with the crank shaft. The crank shaft is disconnected and connected from and to the main gear by coupling. A hydraulic actuator disengages the crank shaft from the main gear. The rotation of the crank shaft disconnected from the main gear is prevented by engagement of a pin and an engaging hole in an engaging block. Under such conditions, the eccentric sleeve is turned relative to the circular eccentric portion to adjust a vertical stroke of the slide.

Abstract: A three-dimensional feed device in a transfer press is disclosed having a pair of feed bars each respectively supported by a pair of feed bar guides having an integral guide plate provided with a through axial bore. Crank shafts each have an eccentric portion loosely extending through the axial bore. A drive shaft is connected to one of the shafts and slidably received in a slide block slidably provided in a stationary casing. A stationary internal sun gear is secured to the casing. A planetary gear meshes with the sun gear and is rotatably supported in a rotary support member coaxial with said sun gear. The planetary gear has an eccentric pin. A slidable rack is supported on the eccentric pin in the casing at right angles to the slidable movement direction of the slide block and a pinion is secured to said drive shaft and meshes with the slidable rack.