Abstract: A plurality of vacuum suction cylinders are connected to each other by using tie rods inserted into insertion holes penetrating side walls of a cylinder tube of each vacuum suction cylinder, insertion holes provided in a first flow path block, and insertion holes provided in a second flow path block, and sandwiching between the first flow path block and the second flow path block.

Abstract: Latch protrusions of an upper surface wall are latched into latch recesses of a first front-surface half wall and an upper end portion of a second front-surface half wall of a magnetic cover, and latch protrusions of the upper surface wall are latched into latch recesses of a first rear-surface half wall and an upper end portion of a second rear-surface half wall of the magnetic cover. Hook portions of the first front-surface half wall and a lower end portion of the second front-surface half wall are folded into a coupling groove of the valve body, and hook portions of the first rear-surface half wall and a lower end portion of the second rear-surface half wall are folded into a coupling groove of the valve body.

Abstract: An electromagnetic operation part of an electromagnetic valve includes a bobbin, a fixed iron core, a movable iron core, a return spring, a magnetic cover, and a magnetic plate. A coil is would around the bobbin. The fixed iron core and the movable iron core are housed in a bobbin hole extending through the bobbin. The return spring places the movable iron core back into an initial position. The magnetic cover covers the electromagnetic operation part. The magnetic plate provides magnetic coupling between the magnetic cover and the movable iron core. The fixed iron core has a spring housing hole extending within and through the fixed iron core. The return spring is housed in the spring housing hole. A proximal end of the return spring is in contact with the magnetic cover, and a distal end of the return spring is in contact with the movable iron core.

Abstract: Latch protrusions of an upper surface wall are latched into latch recesses of a first front-surface half wall and an upper end portion of a second front-surface half wall of a magnetic cover, and latch protrusions of the upper surface wall are latched into latch recesses of a first rear-surface half wall and an upper end portion of a second rear-surface half wall of the magnetic cover. Hook portions of the first front-surface half wall and a lower end portion of the second front-surface half wall are folded into a coupling groove of the valve body, and hook portions of the first rear-surface half wall and a lower end portion of the second rear-surface half wall are folded into a coupling groove of the valve body.

Abstract: A solenoid for an electromagnetic valve, which reduces a magnetic resistance resulting from a space between a movable iron core and a magnetic plate. A magnetic plate provided around a movable iron core forming a magnetic path between a magnetic frame and the movable iron core includes an extending portion extending toward a stationary iron core along a surface of the movable iron core. An area Sa of an opposing portion of an outer periphery of the movable iron core opposing an inner peripheral surface of the magnetic plate and a sectional area Sb of the movable iron core satisfy K=Sa/Sb, K>1. An axial length h of the inner peripheral surface of the magnetic plate and a length L from an attracting-force acting surface of the movable iron core located at a position separate from the stationary iron core to a front end portion of the magnetic plate satisfy 2?K?[value of K when h=L].

Abstract: A solenoid for an electromagnetic valve, which reduces a magnetic resistance resulting from a space between a movable iron core and a magnetic plate. A magnetic plate provided around a movable iron core forming a magnetic path between a magnetic frame and the movable iron core includes an extending portion extending toward a stationary iron core along a surface of the movable iron core. An area Sa of an opposing portion of an outer periphery of the movable iron core opposing an inner peripheral surface of the magnetic plate and a sectional area Sb of the movable iron core satisfy K=Sa/Sb, K>1. An axial length h of the inner peripheral surface of the magnetic plate and a length L from an attracting-force acting surface of the movable iron core located at a position separate from the stationary iron core to a front end portion of the magnetic plate satisfy 2?K?[value of K when h=L].