Smc Kabushiki Kaisha

Hideho Koyama

Michikazu Miyamoto

Junya Kaneko

Naoki Hoshi

A seal member includes a first seal portion inscribed on the outer circumferential surface of a small projection in an end cover, a second seal portion circumscribed around the inner surface of a cylinder tube, and a size expanded portion continuing from said second seal portion.

Seal structure for rodless cylinder

When a guide block is located on each of both ends of a guide rail rollers are situated at a position where they are supported by hard supporting members and of a rail member so that the guide block is positioned at a predetermined position precisely. On the other hand, when the guide block is located at a position in the vicinity of a center of the guide rail the rail member is slightly bent by elasticity of an elastic supporting member in spite of lowering of a position precision in the vicinity of the guide rail due to a warp, a distortion, a bend and the like. Thus, an overload applied to the foregoing rail member and the like is relieved.

Guide mechanism

A rodless cylinder for feeding a workpiece has a cylinder having a cylinder tube with a bore defined therein and a piston reciprocally movably disposed in the bore. The cylinder tube has a slit defined therein and extending longitudinally therealong, the slit communicating between the bore and an exterior space. The slit is closed by a first seal member engaging the piston and a second seal member engaging a slide table. The piston has a separator separating the first and second seal members from each other. The cylinder tube has a pair of slanted first surfaces positioned one on each side of the slit. A pair of slide members is disposed on the slide table and have respective second surfaces engaging the first surfaces, respectively, for guiding the slide table when the piston reciprocally moves in the bore and bearing a load applied to the slide table. The rodless cylinder may additionally have a floating mechanism mounted on the slide table for allowing displacements substantially perpendicular to the direction in which the slide table is movable along the cylinder tube.

Growing community of inventors

Ryugasaki, Japan

Hideho Koyama