A fluid control valve for use in a system for inflating an anti-G garment. The valve includes an elongate chamber in which a valve member is moveable. The chamber has first and second axial ends. An inlet opening in a chamber wall provides for the flow of fluid into the chamber. A valve edge is provided at the second end of the chamber to form an outlet. The valve member has a first portion which closes the first chamber end and is moveable in the chamber between the inlet opening and the first chamber end, an intermediate portion which has a cross sectional area less than that of the chamber wall to permit the inflow of fluid to the chamber, and a second portion including a flow control device which co-operates with the valve edge to control fluid flow from the valve.

Fluid control valve

A welding jig (1) comprises a main chassis (10). A jig member (20) for locating and clamping components (2) of a work piece (3) to be welded is rotably mounted in the main chassis (10) into plurality of different orientations to facilitate accessing joints (7) to be welded. A shaft (34) extending through the jig member (20) is rotatable in bearings (35) mounted on the main chassis (10) for accommodating rotation of the jig member (20). An engagement pin (55) slidable in a housing (56) is mounted on a braking disc (46) fast on one of the shaft (34) is selectively engagable with eight engagement openings (58) in a fixed disc (45) mounted on the main chassis (10) for selectively securing the jig member (20) in eight respective desired orientations.

A welding jig

To prevent a ball-threaded shaft from slipping out of a linear actuator, a linear actuator 10 has an output shaft 18 threaded in a nut 16 for moving forward and backward linearly with respect to an outer tube 22 secured to a housing 20. Linear reciprocating movement of the nut 16 is effected by a ball-threaded shaft 14 rotated normally and reversely by a driving motor 12. The shaft is held against axial displacement by a bearing assembly 8 having an axial disk 32 secured to a proximal end 24 of the ball-threaded shaft 14. On the nut side of the disk within the assembly are disposed a first tension receiving rotational body 36, a thrust bearing 45 and a second tension receiving rotational body 58. The assembly 8 is retained by a tension stopper 62 spread and inserted into an annular central groove 60 in the tube 22. The second tension receiving rotational body 58 is formed with a reduced diameter preventing circumferential surface 66 corresponding to an inner peripheral circumferential surface of the C-shaped tension stopper 62. Even if tension and a rotating force are exerted on the tension stopper 62, causing it to be reduced in diameter, the inner peripheral surface thereof comes into contact with the reduced diameter preventing surface 66.

Ball-threaded shaft anti-slipout type linear actuator

PURPOSE:To provide a diemilling electric discharge machine which is constituted to reduce the occurrence of the machining error of a work owing to the fluctua tion in temperature of machining liquid. CONSTITUTION:When machining is started at a step 101, the temperature of machining liquid is detected by a thermocouple temperature detector to read a detecting result in an NC device at a step 102. A displacement amount H of each axis taking temperature into consideration is calculated at a step 103 by a CPU according to a calculating formula stored at an RAM. The reference point of each axis is corrected at a step 104 according to the displacement amount H and machining of a work is continued at a stop 105. Every time a given time lapses, the steps 102-105 are executed again to correct the reference point of each axis. This constitution and method improve machining precision of a work.

Temperature compensating device and method for diemilling electric discharge machine

An apparatus for finding a machine tool origin includes a base and a sensor positioned on a first side of the base. The sensor includes probe engagement components and electronic circuitry. The probe engagement components are configured for movable engagement with a probe of the machine tool to produce electronic signals processed by the electronic circuitry to provide a signal indicative of the machine tool origin. Mechanical positioning components are positioned on a second side of the base. The mechanical positioning components include a pedestal with a first tab and a second tab aligned to be operable as a mechanical stop with the second tab corresponding to the position of a right-hand origin for the machine tool and the second tab and a third tab aligned to be operable as a mechanical stop with the second tab corresponding to the position of a left-hand origin for the machine tool.

Apparatus for finding a machine tool origin

A work rotating device for a laser beam machine utilizes a work-supporting bed rotatable by a speed reducer mounted on a frame adapted to rest on a table of the laser beam machine. In a first embodiment, the speed reducer is fixed to the frame, and the frame has two orthogonal surfaces alternatively engageable with the table so that the axis of rotation of the work can be either vertical or horizontal. In a second embodiment, the speed reducer is manually tiltable in the frame by direct manual rotation of a shaft on which the speed reducer is mounted. In a third embodiment, the speed reducer through which the work is rotated is mounted on a shaft which is connected to a handwheel through another speed reducer. In a fourth embodiment, the speed reducer through which the work is rotated is tilted by a servo motor operating through a speed reducer.

Work rotating device for laser beam machine tool

A vibration pollination device which simplifies the work for artificial pollination to allow the work to be performed with increased efficiency without damaging the plant. A vibration pollination device (100) has a drive means (120) for driving a vibration excitation means (110) for applying vibration to a plant. The vibration excitation means (110) is provided with a vibration plate (111) which generates air vibration without making direct contact with the plant, and also with an electromagnetic actuator (112) which applies vibration to the vibration plate (111). The drive means (120) is provided with a drive signal generation means (121) which drives the electromagnetic actuator (112) by an electric signal.

Vibration pollination device

PURPOSE:To block rotation of a press force or a telsile force receiving rotary body through friction of a coil spring by a method wherein when an external force applied axially of an output shaft is exerted on a ball screw shaft and a forward reverse rotation force is generated, one of press force and tensile force receiving rotary bodies is rotated and the coil spring is fastened CONSTITUTION:When a force in the direction of an arrow mark E is exerted on an output shaft, a fore in the same direction is exerted on a ball screw shaft 32, and a rotation force is generated in the direction of an arrow mark F A shaft upward press stepped part 44 is about to rotate a pressure force receiving rotary body 42 Thereby, a rotation force in the same direction is exerted on the right end part of a coil spring 50 and a rotation force in a fastening direction, in which a bore is decreased, is exerted thereon Rotation of the press force receiving rotary body 42 is blocked by the coil spring 50 through friction As a result, rotation of the ball screw shaft 32 is prevented Further, when a force in a reverse direction to the direction of the arrow mark E is exerted on the output shaft, rotation of a tensile force receiving rotary body 43 is blocked through friction of the coil spring 50

Ball screw shaft rotation preventing device for linear working machine

PURPOSE:To move a table correctly into a desired position being hardly influ enced by the machining accuracy of a screw shaft and temperature change by correcting the pitch error part of the screw shaft taking real-time account of the expansion length part of the screw shaft caused by temperature change. CONSTITUTION:The pitch error of the screw shaft 28 of a ball screw for moving a table 11 is previously stored into an NC device. The temperature of this screw shaft 28 is measured by a temperature measuring means 23, and the expansion length of the screw shaft 28 is computed from the measured temperature and the linear expansion coefficient of the screw shaft 28. The expansion length part of the screw shaft 28 is added to the stored pitch error for correction to perform the rotatory control of the screw shaft 28. The table 11 can thereby be moved correctly into a desired position.

Table position correcting method with temperature change taken into account

PURPOSE:To easily change the direction of a work installation base by having a reduction gear which has an input shaft and output shaft provided in a frame having two installation surfaces intersecting perpendicularly with the table of a laser beam machine, and the work installation base which is rotated by a motor for revolving the input shaft and the output shaft. CONSTITUTION:The work installation base 24 is rotated by a motor 23 via the reduction gear 22. The work installation base 24 can be changed 90 deg. in direction by replacing the installation surface for the table of the laser beam machine. The work installation base is easily changed in direction by 90 deg. and is installed to the table of the laser beam machine by installing the table of the laser beam machine after selecting either of the two intersecting installation surfaces of the frame 21 according to this constitution. Further, the work installation base can be inclined respectively by changing the construction and manually rotating manual shafts or driving servo motors. The work is subjected to necessary movements by variously changing the directions of the axis of rotation of the work in this way.

Sakura Shunji

Papers

Work rotating device for laser beam machine tool

Vibration pollination device

Ball screw shaft rotation preventing device for linear working machine

Table position correcting method with temperature change taken into account

Work rotating device for laser beam machine