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US 6,390,888 B1Granted
Grinder pressing device
AssigneesNitta Corporation, Yasuhiro Hayakawa
InventorsYuji Amano, Yasuhiro Hayakawa
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AssigneesNitta Corporation, Yasuhiro Hayakawa
InventorsYuji Amano, Yasuhiro Hayakawa
Estimating the term…
A grinder pressing device, wherein either the bottom part of a cylinder main body (10) of an air cylinder (1) in a vertical posture or a piston rod (11) is fixed to a fixed plate (2) and the other one is fixed to a movable plate (3) disposed under the fixed plate (2), either a guide table (G2) or a guide (G1) is mounted on the movable table (3) and the other one is mounted on the outer peripheral surface of the cylinder main body (20) and the guide plate (G2) is guided on the guide (G1) in a vertical direction under the rolling frictional condition through balls and, in the air cylinder (1), a coefficient of friction between the outer peripheral walls of a piston (12) and the piston rod (11) and the structural wall of the cylinder main body (10) is set lower by a metal seal so as to support the piston rod (11) by a ball bush movably in forward and backward directions over an extensive distance, a grinder (G) being mounted on the movable plate (3) and air pressures in upper and lower cylinder chambers (13 and 14) divided by the piston (12) being controlled so as to adjust the pressing force of the grinder (G) to a work to be ground.
A grinder pressing device comprising an air cylinder (1) in a vertical posture, a guide table (G2) and a guide (G1), wherein one of a bottom portion of a cylinder main body (10) and a piston rod (11) of said air cylinder (1) is fixed to a fixed plate (2) and other is mounted to a movable plate (3) disposed below said fixed plate (2), one of said guide table (G2) and said guide (G1) is mounted to a movable plate (3) side and other is mounted on an outer peripheral face of said cylinder main body (10), said guide table (G2) is guided on said guide (G1) in a vertical direction under a rolling frictional condition through balls (B), said air cylinder (1) is formed in a manner that hermeticity is provided by metal seals (MS) between outer peripheral walls of a piston (12) and said piston rod (11) and a structural wall of said cylinder main body (10) side so as to set friction coefficients between said walls low and that said piston rod (11) is supported by a ball bushing (BS) in a large area to move forward and backward, said movable plate (3) is provided directly or through another member with a grinder (G), and pressing force applied to an object to be ground by said grinder (G) can be controlled by adjusting air pressure of upper and lower cylinder chambers (13, 14) separated by said piston (12).
A grinder pressing device comprising a hanging member (5) having a grinder mounting portion (50) and a partition plate (51), upper and lower bellows cylinders (6) (7) fixedly disposed on upper and lower faces of said partition plate (51), and a retaining member (8) for maintaining a constant distance between an upper face of said upper bellows cylinder (6) and a lower face of said lower bellows cylinder (7), wherein said retaining member (8) is mounted to one of a fixed portion (F) and a robot output portion, said grinder mounting portion (50) is provided with a grinder (G), and said upper and lower bellows cylinders (6)(7) are supplied with air of respectively predetermined pressures.
Dependencies are inferred from the claim text.