Abstract: A scroll compressor includes an orbiting bedplate which has an oil passage through which oil flows outward in a radial direction of the orbiting bedplate, a lap-side oil supply hole that causes the oil passage to communicate with a lap-formation surface of the orbiting lap, and a thrust-surface-side oil supply hole that causes the oil passage to communicate with a thrust surface of the orbiting bedplate that is opposite to the lap-formation surface of the orbiting bedplate. An opening and closing mechanism provided in the oil passage closes the thrust-surface-side oil supply hole when the pressure of oil that is drawn from an oil sump by an oil pump and supplied into the oil passage is low, and opens the thrust-surface-side oil supply hole when the pressure of the oil is high.

Abstract: A scroll compressor includes: a shell; a compression mechanism unit accommodated in the shell and defining a compression chamber, the compression mechanism unit having a discharge port through which a discharge chamber and the compression chamber communicate with one another; a discharge valve mechanism that opens and closes the discharge port. The discharge valve mechanism includes a valve seat provided on an outlet portion of the discharge port and a valve and closes the valve seat when sitting on the valve seat. The valve seat includes an annular portion serving as an edge of an opening of the outlet portion and a valve supporting portion that is provided in a region surrounded by the inner circumference of the annular portion and divides the opening of the outlet portion into plural valve seat holes. The valve is in contact with at least a portion of the valve supporting portion and with the annular portion, when sitting on the valve seat.

Abstract: An orbital scroll wrap and a fixed scroll wrap of a scroll compressor include respective scroll start portions each having a bulbous shape defined by connecting an involute start point of an outer-surface involute curve and an involute start point of an inner-surface involute curve to each other with a plurality of arcs. At least one of the scroll start portions has a tiered shape wherein an n number (where n?2) of tiers each having the bulbous shape are stacked in an axial direction of a main shaft. Letting involute-start-point angles of the outer-surface involute curves in respective tiers of the scroll start portion having the tiered shape be ?os(1), ?os(2), ?os(3), . . . , and ?os(n) in order from tip to base of the scroll start portion, the following is satisfied: ?os(1)>?os(2)>?os(3)> . . . >?os(n); and 0.3?<?os(1)-?os(n)<0.7?.

Abstract: A staple removal device includes: a placement table on which a paper bundle is placed, the paper bundle being bound by a staple and including a first paper surface; a moving portion arranged at a position facing the first paper surface, the moving portion being movable in a direction along the first paper surface and including a wedge plate inclined in a wedge shape toward a tip end thereof; a driving portion configured to move the moving portion toward a crown portion and insert the wedge plate between the crown portion and the first paper surface; and an abutment portion arranged at a position facing the first paper surface, the abutment portion being abutted against the crown portion from a direction opposite to an insertion direction of the wedge plate after the wedge plate is inserted between the crown portion and the first paper surface.

Abstract: A scroll compressor includes a shell that is cylindrical, a fixed scroll fixed to an inner wall of the shell, an orbiting scroll that faces the fixed scroll, a frame fixed to the inner wall of the shell and that supports the orbiting scroll, and a heat source device provided on an outside of the shell and between the fixed scroll and the frame and configured to heat or cool the shell from the outside.

Abstract: A scroll compressor includes an orbiting bedplate. The orbiting bedplate has: an oil passage through which oil supplied from an oil supply passage flows outward in a radial direction of the orbiting bedplate; a lap-side oil supply hole that causes the oil passage to communicate with a lap-formation surface of the orbiting lap at which the orbiting lap is formed; and a thrust-surface-side oil supply hole that causes the oil passage to communicate with a thrust surface of the orbiting bedplate that is opposite to the lap-formation surface of the orbiting bedplate. In the oil passage, an opening and closing mechanism is provided. The opening and closing mechanism closes the thrust-surface-side oil supply hole when the pressure of oil that is drawn from an oil sump by an oil pump and supplied into the oil passage is low, and opens the thrust-surface-side oil supply hole when the pressure of the oil is high.

Abstract: A staple removing device configured to remove a staple of a paper bundle bound by the staple includes a loading portion on which the paper bundle is loaded and a pressing member (120A) configured to press the paper bundle to the loading portion. The pressing member (120A) includes a staple support portion (126) configured to position the staple at a removing position at which the staple abuts against the staple support portion (126).

Abstract: A compressor includes a compression mechanism that compresses refrigerant; a main shaft that transmits a rotational driving force to the compression mechanism; a balance weight provided below the compression mechanism and integrated with the main shaft, the balance weight having a cylindrical outer peripheral surface centered at the main shaft; and an oil sump portion provided below the balance weight and stores lubricating oil to be supplied to the compression mechanism. The balance weight has an annular oil-receiving recessed portion in an upper surface, the oil-receiving recessed portion being centered at the main shaft and integrated with the balance weight. The balance weight has a hollow portion in a lower surface, the hollow portion extending in part of the lower surface in a peripheral direction around the main shaft and being integrated with the balance weight. The oil-receiving recessed portion communicates with at least part of the hollow portion.

Abstract: A scroll compressor includes a shell that is cylindrical, a fixed scroll fixed to an inner wall of the shell, an orbiting scroll that faces the fixed scroll, a frame fixed to the inner wall of the shell and that supports the orbiting scroll, and a heat source device provided on an outside of the shell and between the fixed scroll and the frame and configured to heat or cool the shell from the outside.

Abstract: A staple removal device includes: a placement table on which a paper bundle is placed, the paper bundle being bound by a staple and including a first paper surface; a moving portion arranged at a position facing the first paper surface, the moving portion being movable in a direction along the first paper surface and including a wedge plate inclined in a wedge shape toward a tip end thereof; a driving portion configured to move the moving portion toward a crown portion and insert the wedge plate between the crown portion and the first paper surface; and an abutment portion arranged at a position facing the first paper surface, the abutment portion being abutted against the crown portion from a direction opposite to an insertion direction of the wedge plate after the wedge plate is inserted between the crown portion and the first paper surface.

Abstract: A scroll compressor includes a slider. The slider includes a cylindrical portion and a balance weight portion. The balance weight portion includes a counter weight part, a first main weight component, and a second main weight component. The counter weight part has a first outer circumferential surface that is a partial cylindrical surface about the axis of rotation of the slider. The first main weight component has a second outer circumferential surface that is a partial cylindrical surface about the axis of the cylindrical portion. The second main weight component has a third outer circumferential surface that is located radially outward of the second outer circumferential surface and that is a partial cylindrical surface about the axis of rotation of the slider and an inner circumferential surface that is a partial cylindrical surface about the axis of the cylindrical portion.

Abstract: A scroll compressor includes a frame holding an orbiting scroll configured to slide, a fixed scroll configured to form a compression chamber together with the orbiting scroll, and a shell accommodating the frame and the fixed scroll. The shell includes a first inner wall surface and a first protrusion protruding from the first inner wall surface to position the fixed scroll, and the fixed scroll is fixed to the first inner wall surface.

Abstract: A scroll compressor includes: a compression mechanism unit 3 that includes a fixed scroll 31 and an orbiting scroll 32; a crank shaft 6 that causes the orbiting scroll 32 to orbit about the fixed scroll 31; a slider 71 that is provided between the orbiting scroll 32 and the crank shaft 6 and that includes tubular portions 711 and 712 and a flange portion 713 projecting from the outer circumferential surface between one end and the other end of the tubular portions 711 and 712; and a balance weight 72 that is fitted to the slider 71 and that includes a ring-like portion 721 having a portion of the inner surface facing the flange portion 713, a weight portion 722 having an inner surface facing the tubular portion 711 or 712 closer to the one end side U than the flange portion 713, and a projection 723 projecting from the inner circumferential surface of the ring-like portion 721 and having an inner surface facing the tubular portion 711 or 712 closer to the other end side L than the flange portion 713.

Abstract: A scroll compressor including an orbiting scroll and a fixed scroll. A compression chamber is formed by combining a fixed-scroll volute of the fixed scroll and an orbiting-scroll volute of the orbiting scroll. Each of sub-discharge ports of the fixed scroll brings any one of a first compression chamber and a second compression chamber of a compression chamber, the first compression chamber being defined by an inward-facing surface of the fixed-scroll volute and an outward-facing surface of the orbiting-scroll volute, the second compression chamber being defined by an outwardfacing surface of the fixed-scroll volute and an inward-facing surface of the orbiting scroll volute, and a discharge side into communication with each other.

Abstract: A scroll compressor includes a bush having a shaft part and a balance weight part. The balance weight part is secured to an outer periphery of the shaft part by shrink-fitting. The shaft part includes: a cylindrical body part; and a cylindrical coupling part which extends outward from an axial end portion of the body part, and to which the balance weight part is joined. The bush satisfies the following requirements: 1.2?D2/D1?1.6; and??(a) 1.0?[(D2?D3)/(D4?D2)]×E1/E2?3.5,??(b) where D1 is the outer diameter of the body part, D2 is the outer diameter of the coupling part, D3 is the inner diameter of the body part, D4 is the outer diameter of the balance weight part, E1 is the Young's modulus of the shaft part, and E2 is the Young's modulus of the balance weight part.

Abstract: A scroll compressor includes a crank shaft, an orbiting scroll, and a frame. The crank shaft has a lubricant channel. The orbiting scroll has an inner channel and a lubricant channel groove. The inner channel allows the lubricant supplied through the crank shaft to flow outward. The lubricant channel groove has an annular shape and allows the lubricant supplied through the inner channel to be supplied to the thrust surface. The lubricant channel groove is formed such that the lubricant channel groove stays within a region of the thrust surface while the orbiting scroll is orbiting.

Abstract: A scroll compressor includes a crank shaft 6, an orbiting scroll 32, and a second plug part 329. The crank shaft 6 has a lubricant channel 63 which allows lubricant 9 to flow therethrough. The orbiting scroll 32 is attached to the crank shaft 6 and has a second inner channel 327 that allows the lubricant supplied thereto through the crank shaft 6 to outwardly flow therethrough. The second plug part 329 serving as an adjustment part is provided in the second inner channel 327 of the orbiting scroll 32 and adjusts a flow amount of the lubricant 9 flowing through the second inner channel 327.

Abstract: A scroll compressor includes a slider. The slider includes a cylindrical portion and a balance weight portion. The balance weight portion includes a counter weight part, a first main weight component, and a second main weight component. The counter weight part has a first outer circumferential surface that is a partial cylindrical surface about the axis of rotation of the slider. The first main weight component has a second outer circumferential surface that is a partial cylindrical surface about the axis of the cylindrical portion. The second main weight component has a third outer circumferential surface that is located radially outward of the second outer circumferential surface and that is a partial cylindrical surface about the axis of rotation of the slider and an inner circumferential surface that is a partial cylindrical surface about the axis of the cylindrical portion.

Abstract: A scroll compressor includes a slider including a cylindrical portion supported by a rocking bearing provided on an orbiting scroll so that it rotates freely, and a balance weight portion connected to the cylindrical portion. When a direction opposite to an eccentric direction of the orbiting scroll is a counter eccentric direction and a direction of a central axis of the rocking bearing is a Z-axis direction, the balance weight portion includes a main weight portion provided at a position distant from a center of rotation of the slider in the counter eccentric direction, and a counter-weight portion provided at a position spaced away from the orbiting scroll than a position of a center of the rocking bearing in the Z-axis direction and at a position distant from the center of rotation of the slider in the eccentric direction.

Abstract: A scroll compressor includes a frame holding an orbiting scroll configured to slide, a fixed scroll configured to form a compression chamber together with the orbiting scroll, and a shell accommodating the frame and the fixed scroll. The shell includes a first inner wall surface and a first protrusion protruding from the first inner wall surface to position the fixed scroll, and the fixed scroll is fixed to the first inner wall surface.