Abstract: In a work pallet positioning and fixing device that positions a work pallet over a base member in the horizontal direction and in the vertical direction and fixes it thereto by pressing forces of clamp bolts, the base member is provided with first and second reference members for positioning, and a reference seating surface and, by making bolt head accommodation holes of bolt holes for four fitting bolts fitting flange portions of the reference members partially overlap with protruding engagement portions as seen in plan view, a plurality of tapered engagement surfaces on the external peripheries of the protruding engagement portions being segmented into four sections.

Abstract: An article positioning mechanism for positioning an article comprising a component or a tool with respect to a mounting portion of a movable member of a mechanical device and also restraining rotation thereof includes a holder member to which the article is fixed and a frame shaped member that is fixed to the mounting portion, the holder member including position regulation surfaces and a tapered male engagement portion that is formed as a regular polygon and also is sloped so as to approach its axis in the direction towards the mounting portion, the frame shaped member including a reference surface that receives the position regulation surfaces and positions them in the axial direction, and a tapered female engagement portion that is formed as a regular polygon and also is sloped in the same direction as the tapered male engagement portion.

Abstract: A positioning and fixing device positions a work pallet in the vertical and horizontal directions relative to a base member via a ring member, and also restricts its rotation around the vertical axis. The base member has Z reference surfaces that can stop a lower end reference surface of the ring member and position it in the vertical direction, and a tapered male engagement portion whose horizontal cross section is formed as a regular polygon having a plurality of outwardly convex circular arcuate vertex portions and a plurality of side portions, and that reduces in diameter upwards. The ring member has a tapered female engagement portion that can engage with the tapered male engagement portion so that its lower end reference surface is in contact against the Z reference surfaces.

Abstract: A tool unclamping device according to the present invention comprises a motor, a rotary shaft connected to the motor, a cam provided on the rotary shaft, a power transmission member, pressed by the cam to be axially movable, having a recess at the center in the radial direction thereof, a frame so provided as to enclose the power transmission mechanism, a support member inserted into the power transmission mechanism in the radial direction thereof and fixed to the frame, an elastic member set in the recess located between the power transmission member and the support member for urging the power transmission member toward the motor and an output shaft driven by power from the power transmission mechanism for unclamping a tool.

Abstract: An actuator includes a power source, a cam member driven by power from the power source, a following member moving in connection with a motion of the cam member, an accommodation chamber accommodating an actuating medium, and a punch cylinder outputting the power transmitted to the actuating medium by the following member.

Abstract: A fixing structure of a spindle balancer for a machine tool in which a spindle balancer can be attached easily to a machine tool at an appropriate position in an appropriate posture while being supported stably and surely by the machine tool, safety is enhanced when the spindle balancer is attached to the machine tool by lessening the attaching load, set-up including replenishment of the cylinder body with compression gas and regulation of gas pressure is facilitated, and the attachment time and set-up time of the spindle balancer can be shortened.

Abstract: A turntable includes a driving source, a workpiece holder holding a workpiece to be processed by a tool, a motive power transmission mechanism that can transmit the motive power from said driving source to said workpiece holder, and a load mechanism that can activate said motive power transmission mechanism under a load-applied state, and applying a predetermined load to said motive power transmission mechanism during processing of said workpiece.

Abstract: Provided is a machine tool spindle balancer that stably pulls and biases the spindle unit upward and thus reduces the load of the lift means for moving the spindle unit vertically, is easily applicable to existing machine tools, highly durable, downsizable, and has a simple structure advantageous in production cost. A spindle balancer 30 comprises a gas spring 31 having a cylinder body 32, a rod 33, and a compressed gas. The gas spring 31 is provided above the spindle unit 10. The bottom end of the rod 33 is coupled to the spindle unit 10 so that the spindle unit is pulled and biased upward by the biasing force of the gas spring 31 that is applied on the rod 33, whereby the biasing force of the gas spring 31 serves to reduce the load of the lift mechanism 20.

Abstract: A tool unclamping device according to the present invention comprises a motor, a rotary shaft connected to the motor, a cam provided on the rotary shaft, a power transmission member, pressed by the cam to be axially movable, having a recess at the center in the radial direction thereof, a frame so provided as to enclose the power transmission mechanism, a support member inserted into the power transmission mechanism in the radial direction thereof and fixed to the frame, an elastic member set in the recess located between the power transmission member and the support member for urging the power transmission member toward the motor and an output shaft driven by power from the power transmission mechanism for unclamping a tool.

Abstract: A tool unclamping device is a device capable of unclamping a tool clamped to a spindle of a machine tool, and comprises a casing, an output shaft set on this casing and capable of outputting power necessary for unclamping the tool, a motor serving as a power source capable of supplying power for driving the output shaft, a power transmission mechanism transmitting the power from the motor to the output shaft and a gas cylinder serving as an auxiliary power source capable of supplying auxiliary power to this power transmission mechanism.

Abstract: A workpiece support has a simplified structure and can operate with improved dependability and reliability. The workpiece support has a rod, a sleeve body externally fitted on the rod and elastically deformable so as to shrink in diameter, a case member supporting the sleeve body, and an external peripheral hydraulic chamber formed on the external periphery of the sleeve body. A hydraulic cylinder is provided for moving the rod in the axial direction and oil passage are provided for connecting the hydraulic operating chamber of the hydraulic cylinder with the external peripheral hydraulic chamber when the piston member of the hydraulic cylinder has moved up to or to the vicinity of the stroke end thereof.

Abstract: A balancer mechanism is provided that applies a balancing rotary moment to a rotary shaft that at least partly cancels rotary moment applied to the rotary shaft so as to reduce the rotary moment in a simple and reliable manner. A rotary shaft balancer mechanism (8) comprises a gas spring (20), a first coupler (40) that rotatably couples the bottom end of the gas spring (20) to a stationary member (10) on a shaft supporting member (5), and a second coupler (45) that rotatably couples the bottom end of the gas spring (20) to a rotary member (15) fixed to the left end of a rotary shaft (3) at a position offset to the axis (A) of the rotary shaft (3).

Abstract: The present invention presents a work pallet positioning and fixing device capable of positioning in both horizontal and vertical directions through elastic deformation of an annular engaging portion, wherein the engaging portion can elastically deform along the entire periphery and even locally in a circumferential direction thereof.

Abstract: A work pallet that is arranged to be simple in construction capable of machining five faces of a work by rotating it around the axis of rotation. A work pallet (4) comprises a base body (5) detachably fixed to the table (3) of a machine-tool (1), a pallet main body (6) fixed on the top face of this base body (5), and a work setting face forming body (7), provided on this pallet main body (6) in a way to turn around the rotational axis (20) and having a work setting face (21a) for fixing a work (2), and the pallet main body (6) is provided with a clamping mechanism (31) for releasably fixing the work setting face forming body (7), and a rotational driving mechanism (32) for rotationally driving the work setting face forming body (7) around the rotational axis (20).

Abstract: A vice is comprising a movable clamp member that can be positioned and fixed in a prescribed position corresponding to the size of a workpiece, before fixing the workpiece, wherein the mechanism for achieving this positioning and fixing operation can be simplified, and the stroke of a fluid pressure cylinder can be shortened.

Abstract: There is provided a A workpiece support that has a simplified structure and can operate with improved dependability and reliability. The workpiece support (1) has a rod (4), a sleeve body 10 that is externally fitted on the rod (4) and that is elastically deformable so as to shrink in diameter, a case member (3) for supporting the sleeve body (10), and an external peripheral hydraulic chamber (23) formed on the external periphery of the sleeve body (10). A hydraulic cylinder (5) is provided for moving the rod (4) in the axial direction, and oil passage (35, 35a, and 35b) are provided for connecting the hydraulic operating chamber (16) of the hydraulic cylinder (5) with the external peripheral hydraulic chamber (23) when the piston member (30) of the hydraulic cylinder (5) has moved up to or to the vicinity of the stroke end thereof.

Abstract: The object of the present invention is to provide a work pallet of simple structure constructed so as to be capable of machining five faces of a work by turning the work around a rotational axis.

Abstract: A clamp system includes a plurality of clamping devices arrayed along at least a first hydraulic supply loop and a plurality of support devices arrayed along at least a second hydraulic supply loop. The clamping devices may include vertical rotating clamping devices which rotate vertically to secure a workpiece to a base plate. The clamping devices may also include horizontally rotating clamping devices which rotate axially and extend vertically to clamp the workpiece. The support devices support and stabilize the workpiece during machining operations. The first and second hydraulic supply loops are interconnected and allow the clamping devices to clamp the workpiece before the support pieces support the workpiece. The second hydraulic supply loop boosts support to and locks the support devices for additional stability.

Abstract: The present invention presents a work pallet positioning and fixing device capable of positioning in both horizontal and vertical directions through elastic deformation of an annular engaging portion, wherein the engaging portion can elastically deform along the entire periphery and even locally in a circumferential direction thereof.

Abstract: A fluid pressure cylinder with pressure intensifying function, has an oil-filled hydraulic pressure cylinder which is filled with oil and tightly sealed. A gas-filled gas spring is charged with gas and tightly sealed. By means of gas spring, oil in oil chamber of hydraulic pressure cylinder is pressurized to a pressure level higher than the gas pressure in gas actuating chamber of gas spring. This results in a strong pushing force being generated via output piston of hydraulic pressure cylinder.