Abstract: An apparatus main body 1 is provided with an air supply passage 19 for supplying compressed air for supporting a borne surface 42 in a shape of a projecting spherical surface of an aligning member 4 on a bearing surface 32 in a shape of a partial recessed spherical surface of an air bearing 3 such that the borne surface 42 can be aligned and for floating the aligning member 4 with respect to the air bearing 3. A lock mechanism for locking the aligning member 4 has contact faces 24 and 44 in contact with each other at a locking portion 25 at a tip end of a piston rod driven by a cylinder driving portion 2 and on a face of the aligning member 4 opposite to the borne surface 42 and the contact faces are formed into partial spherical surfaces concentric with the borne surface 42.

Abstract: In order to produce a cellulose ester film constructed of a front layer, an intermittent layer and a rear layer, a dope solution is doped on a supporter. In at least one of the front layer and the rear layer, a mass ratio of a cotton linter to a wood pulp (cotton linter/wood pulp) is between 5/95 and 0/100, and a solvent of the dope contains more than 15 wt. % alcohols and hydrocarbons whose carbon number each is 1-10. Further, a ratio of a solid content density of a solution for forming the front layer and the rear layer to a solid density of a solution for forming the intermittent layer is less than 0.9 wt. %, and a total thickness of the solutions for front and rear layers is more than 5% of the dope ribbon.

Abstract: In a cylinder having a piston 2 and a cylinder body 3 having a piston chamber 4 in which said piston 2 is slidably accommodated, a guide shaft 9 extending toward the piston chamber 4 is provided on a head-side end wall 8 of the cylinder body 3, and the piston 2 includes a guide hole 2c in which the guide shaft 9 is accommodated. A plurality of grooves 9a and 2d respectively extending in axial directions are provided between an outer peripheral surface of the guide shaft 9 and an inner peripheral surface of the guide hole 2c. A plurality of steel balls 13 are provided between the grooves 9a and 2d.

Abstract: A plurality of connecting members are provided to a tool adaptor to which a tool is mounted, a plurality of connecting jaw members having inclined faces which are engaged with and detached from the connecting members when the connecting jaw members are displaced in radial directions, a rod that expands and contracts due to operation of air pressure, and a cam-type converting mechanism for converting the expanding/contracting operation of the rod to operations of displacement of the jaw members are provided to a mounting unit mounted to a robot hand, and a stopper portion for preventing the connecting member from being detached and falling from the inclined face when the air pressure reduces is provided to each the jaw member.

Abstract: In an electric hand, a cam member 12 mounted to a drive shaft 3a of an electric motor 3 is provided with a pair of cam grooves 15 and 15, a pair of jaw members 2 and 2 for grasping a workpiece are provided with drive pins 13 fitted to the cam grooves 15 and 15, and a normal or reverse rotation motion of the drive shaft 3a is converted into an opening or closing motion of the jaw members 2 and 2 by the cam member 12 and the drive pins 13. A torque limiter 6 having a friction plate 19 for connecting by a frictional force the drive shaft 3a of the electric motor 3 and the cam member 12 is provided between the drive shaft 3a and the cam member 12, and a torque of the drive shaft 3a transmitted to the cam member 12 is limited by this torque limiter 6.

Abstract: A spring or springs are provided between driving-side members that operate together with an output shaft of a stepping motor, and driven-side members that operate together with a jaw member. Thereby, when the jaw members performs opening motion, the driving-side members and the driven-side member directly engage with each other, thereby allowing a driving force to be transmitted directly from the output shaft to the jaw members. When the jaw members performs workpiece-holding operation, the driving-side members and the driven-side member engage each other via the spring or springs, thereby allowing the driving force to be elastically transmitted from the output shaft to the jaw members via the spring or the springs. In this configuration, when the workpiece-holding operation is performed by the jaw members, the stepping motor is controlled so as to over-rotate in a buffered manner.

Abstract: An inertial force applied to a motor drive shaft when jaw members stop at opening and closing ends, grasping positions of a workpiece, and the like is absorbed and damage to motor parts such as gears due to impact is prevented.

Abstract: In a cylinder having a piston 2 and a cylinder body 3 having a piston chamber 4 in which said piston 2 is slidably accommodated, a guide shaft 9 extending toward the piston chamber 4 is provided on a head-side end wall 8 of the cylinder body 3, and the piston 2 includes a guide hole 2c in which the guide shaft 9 is accommodated. A plurality of grooves 9a and 2d respectively extending in axial directions are provided between an outer peripheral surface of the guide shaft 9 and an inner peripheral surface of the guide hole 2c. A plurality of steel balls 13 are provided between the grooves 9a and 2d.

Abstract: An apparatus main body 1 is provided with an air supply passage 19 for supplying compressed air for supporting a borne surface 42 in a shape of a projecting spherical surface of an aligning member 4 on a bearing surface 32 in a shape of a partial recessed spherical surface of an air bearing 3 such that the borne surface 42 can be aligned and for floating the aligning member 4 with respect to the air bearing 3. A lock mechanism for locking the aligning member 4 has contact faces 24 and 44 in contact with each other at a locking portion 25 at a tip end of a piston rod driven by a cylinder driving portion 2 and on a face of the aligning member 4 opposite to the borne surface 42 and the contact faces are formed into partial spherical surfaces concentric with the borne surface 42.

Abstract: In an electric hand, a cam member 12 mounted to a drive shaft 3a of an electric motor 3 is provided with a pair of cam grooves 15 and 15, a pair of jaw members 2 and 2 for grasping a workpiece are provided with drive pins 13 fitted to the cam grooves 15 and 15, and a normal or reverse rotation motion of the drive shaft 3a is converted into an opening or closing motion of the jaw members 2 and 2 by the cam member 12 and the drive pins 13. A torque limiter 6 having a friction plate 19 for connecting by a frictional force the drive shaft 3a of the electric motor 3 and the cam member 12 is provided between the drive shaft 3a and the cam member 12, and a torque of the drive shaft 3a transmitted to the cam member 12 is limited by this torque limiter 6.

Abstract: A two-drive-system fluid pressure chuck including two sets of jaw members capable of chucking a workpiece from two directions X and Y. The chuck includes two cylinder apparatuses, a first rod, a second rod, and a cam member. The first rod being slidably disposed within the inside of the second rod. The cam member is formed at the tip of each rod and is used to convert the reciprocal operation of each rod into the opening and closing operations of the jaw members. A notch is formed in the side of the second rod, and the cam member of the first rod protrudes out from the second rod through this notch to connect to the jaw member.

Abstract: A linear actuator comprising a guide section formed along a longitudinal direction to protrude on a bottom surface of a slide table, a pair of guide blocks formed mutually opposingly and seperated from each other by a predetermined spacing distance on an upper surface of the main cylinder body, attachment holes for attaching the main cylinder body to another member in any direction of attachment from a side of the slide table or from a side of the main cylinder body, and an adjuster bolt for adjusting an amount of displacement of the slide table.

Abstract: Piston rods are coupled to respective pistons movably disposed respective cylinder chambers defined in a cylinder body. The piston rods have distal ends connected to an end plate mounted on a slide table which is mounted for movement along a guide rail. When the piston rods are displaced by the pistons, the slide table is also displaced axially of the cylinder body. When the slide table is positioned at either end of its stroke, a load is applied by the weight of a workpiece supported on the slide table and the weight of the slide table itself to the cylinder body through the guide rail. The slide table is thus prevented from being unduly flexed under the load. The length of the slide table can be set to a desired length irrespective of an increase in the displacement of the slide table. Even if the displacement of the slide table is increased, the slide table is not flexed and hence remains highly rigid against flexure.

Abstract: An air cylinder has a cylinder body, a slide table movable along a guide rail on the cylinder body, a stopper block mounted on the cylinder body, a pair of adjustment bolts mounted on the slide table and spaced from each other with the stopper block interposed therebetween, and a cover disposed on and extending along a side edge of the slide table in covering relation to the stopper block and the adjustment bolts.

Abstract: A method for making a rubbery weatherstrip having a suede appearance and a suede feel includes a step for coextruding a welt portion of a weatherstrip and an outer rubber layer containing fibrillated fibers, namely bast fibrillated fibers, leaf fibrillated fibers and mixture thereof, or a welt portion of a weatherstrip, a sealing portion and an outer rubber layer containing fibrillated bast or leaf fibers to adhere these sheets, a step for vulcanizing the entire portions thereof, and a step for subjecting the outer rubber layer to buff processing.

Abstract: A tool fastening apparatus for industrial robots comprises a coupling unit attached to the arm of a robot and a coupling unit attached to a tool to be used with the robot. When the two coupling units are joined together, their relative position can be easily and accurately fixed by means of positioning couplings comprising ball rings carrying a set of annularly arranged balls slightly sticking out from the plane of contact between the two coupling units. Accurate positioning is achieved by bringing the balls on the two ball rings into engagement, which, in turn, is achieved by fitting each ball on one ball ring into between two adjoining balls on the other ball ring.

Abstract: A method for the preparation of a graft polymer membrane comprising an inactive polymer film having TFS as a graft chain. The inactive polymer film is irradiated with ionizing radiation, and the resulting irradiated film is graft-polymerized by contacting said film with TFS.This product may then be sulfonated to provide a cation exchange membrane; or the obtained graft polymer may be haloalkylated, and quarternary aminated to provide an anion exchange membrane; or the graft polymer membrane may be used to prepare a weakly acidic cation exchange membrane by substituting at least part of the benzene rings of the graft polymer by one of the groups among hydroxyl groups, carboxylic acid groups, phosphoric acid groups and phosphorous acid groups.The polymeric membrane products are also disclosed and claimed.