Abstract: A magnetic chuck includes a cylinder tube including a workpiece attraction surface to which a workpiece is attracted, a piston assembly including a permanent magnet and being movable in an internal space of the cylinder tube, the piston assembly separating the internal space of the cylinder tube into a first pressure chamber and a second pressure chamber, a first supply/discharge port formed in the cylinder tube and communicating with the first pressure chamber, a second supply/discharge port formed in the cylinder tube and communicating with the second pressure chamber, and a communication passage configured to allow the first pressure chamber and the second pressure chamber to communicate with each other.

Abstract: A magnetic chuck includes a cylinder tube including a workpiece attraction surface to which a workpiece is attracted, a piston assembly including a permanent magnet and being movable in an internal space of the cylinder tube, the piston assembly separating the internal space of the cylinder tube into a first pressure chamber and a second pressure chamber, a first supply/discharge port formed in the cylinder tube and communicating with the first pressure chamber, a second supply/discharge port formed in the cylinder tube and communicating with the second pressure chamber, and a communication passage configured to allow the first pressure chamber and the second pressure chamber to communicate with each other.

Abstract: A pair of air cylinders that cause a valve plate to perform an opening/closing operation each include a head-side air cushion mechanism and a rod-side air cushion mechanism. Each head-side air cushion mechanism includes a head-side communication path and a head-side restricting flow path that connect a head-side pressure chamber and a head-side main flow path in parallel, and a blocking mechanism that blocks the head-side communication path when a piston approaches a retreat stroke end, and each rod-side air cushion mechanism includes a rod-side communication path and a rod-side restricting flow path that connect a rod-side pressure chamber and a rod-side main flow path in parallel, and a blocking mechanism that blocks the rod-side communication path when the piston approaches an advance stroke end.

Abstract: A pipe joint includes a joint body formed with a through hole therein along an axial direction, and having male threads and an extending shaft portion formed on one end side thereof; and a nut member formed with an insertion hole through which a tube member is inserted, and having female threads formed therein that screw-engage with the male threads. Annular projections are formed on an outer circumferential surface of the extending shaft portion, and the tube member, which is expanded in diameter, is gripped between the annular projections and an inner circumferential surface of the nut member.

Abstract: A two-way valve configured to switch between a communication state and a non-communication state of between a primary port and a secondary port includes a valve body having the primary port and the secondary port and containing a valve seat portion therein, a diaphragm valve supported inside the valve body so as to be brought into contact with and separated from the valve seat portion, and a drive mechanism configured to displace the diaphragm valve. The diaphragm valve includes an annular projection facing a flat seat surface of the valve seat portion and an elastic member attached at the back of the annular projection.

Abstract: A wireless communication system allows the movement of a carriage or an automated conveyance vehicle to which a plurality of slave wireless device and a plurality of appliances are provided. A master control unit of a master wireless device uses a master communication unit to transmit a cut-off request signal to a slave wireless device deviating from a communication-target region. If a slave communication unit receives the cut-off request signal, a slave control unit of the slave wireless device cuts off a wireless connection.

Abstract: In a fluid control valve, a cylinder chamber includes a first pilot chamber extending from a piston in one of sliding directions. An opening of a first pilot port allowing supply and discharge of fluid is formed in the inner wall of the first pilot chamber. The fluid is accommodated in the first pilot chamber when the piston is in a valve open position, and discharged via the opening when the piston is displaced toward a valve closed position. At least one of the piston and a valve body includes a throttle portion forming, between the piston and the valve body, a throttle path having a cross-sectional area smaller than the area of the opening, after the piston starts being displaced from the valve open position toward the valve closed position.

Abstract: A pair of air cylinders that cause a valve plate to perform an opening/closing operation each include a head-side air cushion mechanism and a rod-side air cushion mechanism. Each head-side air cushion mechanism includes a head-side communication path and a head-side restricting flow path that connect a head-side pressure chamber and a head-side main flow path in parallel, and a blocking mechanism that blocks the head-side communication path when a piston approaches a retreat stroke end, and each rod-side air cushion mechanism includes a rod-side communication path and a rod-side restricting flow path that connect a rod-side pressure chamber and a rod-side main flow path in parallel, and a blocking mechanism that blocks the rod-side communication path when the piston approaches an advance stroke end.

Abstract: A pipe joint includes a joint body formed with a through hole therein along an axial direction, and having male threads and an extending shaft portion formed on one end side thereof; and a nut member formed with an insertion hole through which a tube member is inserted, and having female threads formed therein that screw-engage with the male threads. Annular projections are formed on an outer circumferential surface of the extending shaft portion, and the tube member, which is expanded in diameter, is gripped between the annular projections and an inner circumferential surface of the nut member.

Abstract: A two-way valve configured to switch between a communication state and a non-communication state of between a primary port and a secondary port includes a valve body having the primary port and the secondary port and containing a valve seat portion therein, a diaphragm valve supported inside the valve body so as to be brought into contact with and separated from the valve seat portion, and a drive mechanism configured to displace the diaphragm valve. The diaphragm valve includes an annular projection facing a flat seat surface of the valve seat portion and an elastic member attached at the back of the annular projection.

Abstract: A monitoring device includes a first pressure sensor that detects a first pressure value of a pressurized fluid in a first pipe, a second pressure sensor that detects a second pressure value of a pressurized fluid in a second pipe, and a detector that determines, on the basis of the first pressure value and the second pressure value, whether or not a piston has reached one end or the other inside a cylinder body.

Abstract: On inner wall surfaces of a head cover and a rod cover of a fluid pressure cylinder, respective pluralities of first and second spigot pins are installed to project out from the inner wall surfaces. The first and second spigot pins are disposed on circumferences of a predetermined diameter that internally contact or inscribe the cylinder tube. Further, when the cylinder tube is assembled with respect to the head cover and the rod cover, by the flange members of the first and second spigot pins inscribing the inner circumferential surface thereof, the cylinder tube is positioned and assembled coaxially with respect to the centers of the head cover and the rod cover.

Abstract: In an interior of a cylinder tube of a fluid pressure cylinder, a piston unit is provided, which is displaced along an axial direction under the supply of a pressure fluid. The piston unit includes a disk shaped plate body, which is connected to one end of a piston rod, and a ring body connected to an outer edge portion of the plate body. The plate body is connected to the piston rod by plural second rivets, which are punched in an axial direction with respect to the piston rod.