Abstract: A conveyor chain constructed so as to prevent a leakage of lubricant oil to the outside. The conveyor chain comprises a plurality of bearing elements operable to revolve in a raceway between an outer circumferential surface of a bush and an inner circumferential surface of a roller. A pair of right and left thrust bearing annular members are press-fitted onto the outer circumferential surface of the bush and are positioned between the inner side surface of an inner link plate and the outwardly-facing end surfaces of the bearing elements. Annular sealing members for sealing lubricant oil within bearing element raceway are disposed between the inner circumferential surface of the roller and an inner circumferential surface of the thrust bearing annular member. The sealing members slidably contact but are not deformed by the inner circumferential surface of the roller.

Abstract: The invention provides a chain transmission mechanism capable of alleviating impact and impact noise caused when a chain engages and contacts with a sprocket, of not increasing the impact and impact noise even if the chain transmission mechanism is driven in heavy load and in high speed, of reducing vibrations, breakage, wear and others of the chain and the sprocket and of improving its durability. Tooth bottoms of the sprocket are formed so as not contact any pin, bush or drive roller when the chain is wound around the sprocket as guide rollers rotatably supported coaxially with a pin of the chain rolls on a track along the guide rail provided on the side of teeth of the sprocket. The invention provides a guide rail around the sprocket to engage the chain and lighten its impact with the sprocket as the mechanism operates.

Abstract: There is provided a seal chain in which sealing performance of a seal mechanism is enhanced so as to be able to deal with a displacement radially of the connecting pins, and to be able to keep a sealing function for a long period of time even if highly fluid lubricant is used. Each seal mechanism comprises an inner circumferential ring fitted and fixed onto the end of the bush an annular seal receiving member disposed on the outer peripheral side of the inner circumferential ring so as to be movable in the radial direction and attached with an annular member enclosing a radial seal on the side of the outer link plate, a bellows seal extending between the inner circumferential ring and the annular seal receiving member and deformable in the radial direction and a seal ring provided on the side of the outer link plate facing to the inner link plate at the position corresponding to the annular radial sealing member concentrically with the pin to abut with the annular sealing member to seal the lubricant.

Abstract: A multifunctional conveyance type conveyor chain is disclosed in which ball units and conveyance auxiliary units can be separately and easily attached and detached to a chain link. A multifunctional conveyance type conveyor chain (100) includes a number of chain links (110) which are each integrally molded of an article loading portion (111) on which an article is loaded and a plurality of hinge portions (112). The chain links (110) are connected to each other in a longitudinal direction of the chain through hinge pins (120). A ball unit (130) holds a free ball (131) which rolls in an exposed manner on both a surface and a back surface of the chain link (110). Conveyance auxiliary units 140 mountable in place of ball units (130) are respectively selectively inserted and mounted between every hinge portions (112, 112).

Abstract: An improved cable or the like protection and guide device in which even if curling, strain and the like exist in a side plate after molding, static electricity can escape and the device can be produced at a reduced cost. In a cable or the like protection and guide device according to the present invention a plurality of link bodies (11) articulably connected to each other in the longitudinal direction in a state where a cable or the like (15) was inserted into the device, comprises a pair of side plates (21) disposed on both sides of the cable or the like and connecting rods (22, 23) respectively bridged on the bend or articulation outer peripheral side and on the bend or articulation inner peripheral side of the side plate. Each of the side plates slide-contacts a side plate of an adjacent link body. At least the side plate is made of a synthetic resin having conductivity and a conductive member (55) is provided in a slide contact portion between the side plates of the adjacent link bodies.

Abstract: A linear motor driven conveyor apparatus is disclosed for conveying trucks carrying articles to be processed through a paint booth or other treatment area having a dirt-laden atmosphere, and water supply means are provided to produce a continuously flowing film of water over the upper surfaces of the primary members of the linear motor to keep such surfaces free of contaminants.

Abstract: A method for manufacturing a resin impregnated cloth bearing surface wherein the resin impregnated cloth is deaerated to reduce air bubbles in the finished bearing.

Abstract: A linear motor driven conveyor which includes a carrier rail and primary members provided within a pit, main trolleys adapted to run along the carrier rail and connected with a carrying frame, and front and rear trolleys. The connecting members are pivotably connected vertically and horizontally with each trolley within the pit, the lower surfaces of the connecting members each having a reaction plate of a linear induction motor.

Abstract: A linear motor driven conveyor apparatus is disclosed for conveying trucks carrying articles to be processed through a paint booth or other treatment area having a dirt-laden atmosphere, and a water tank is provided in the treatment area in which the secondary member of the linear motor is immersed to keep its surfaces free of contaminants.

Abstract: A circuit for signaling an operator when a linear actuator, driven by a reversible direct current motor, has reached opposite end positions. Two normally closed series-connected switches which open at the respective positions and diodes, connected across each switch and to each other in opposition, stop the motor when the actuator reaches either position. A third switch and third diode cause a lamp to energize at one of the positions and remain energized until the actuator moves to the other position.

Abstract: A hydraulically actuated tensioner of a toothed belt. A piston slidable with clearance in a cylinder forms front and rear oil-filled chambers communicating through a passage in the piston with a check valve for restricting flow in one direction. A piston rod extending from one end of the piston is urged by a spring, through the front chamber, against a roller to impart tension on the belt. An oil reservoir communicating with the front chamber is enclosed by a spring-biased diaphragm for maintaining the oil pressure in the chambers above atmospheric pressure at all times.

Abstract: A hydraulic ball-type check valve tensioner includes a plunger internally provided with an oil chamber and slidably fitted in a housing in association with a spring biasing the plunger in a protruding direction, and a ball-type check valve between the housing and oil chamber to permit oil flows into the oil chamber while blocking oil flow in the reverse direction. A relief valve includes a sleeve slidably fitted in an auxiliary oil chamber in communication with the oil chamber, a spring biasing the sleeve into a depressed position, and a discharge port to be opened when the sleeve is slided against the biasing spring action. A no-return mechanism includes a rack formed on the outer surface of the plunger, and a ratchet rotatably supported in the housing in meshing engagement with the rack and biased by a spring in a direction opposite to the protruding direction.

Abstract: A gyratory device for mounting a parabolic antenna on a base or frame in which the gyratory part includes a tubular stationary part receiving a motor and drive connections within the tubular part, a sleeve surrounding the tubular part. Adjustable arms are provided to adjust the axis of the gyratory part relative to the rotary axis of the earth and to adjust the angle of the antenna on the sleeve.

Abstract: A conveyor device for conveying articles along a predetermined path of travel having a running rail on opposite sides of the path of travel. A bus bar is below said running rails. A self-propelled carrier has driving wheels to roll on the running rails. The wheels are rotated by a single electric motor which receives power from the bus bar. Cover members overhang the running rails and wheels during operation, and interlock with the rail support member so that the cover may be readily removed by disengaging the interlock.

Abstract: A surface hardened pin for a chain is made from a ferrous alloy containing manganese, silicon, chromium, molybdenum and about 0.1 to 0.4% carbon, with the balance essentially iron. The layer is formed of ferrous material containing chromium and 0.6 to 0.9% carbon and has a plurality of carbide particles dispersed therethrough. The hardened surface layer is formed by gas carburizing the pin.

Abstract: A link chain comprising a series of inner links, outer links and means connecting said inner and outer links for pivotal displacement about a series of transverse axes. The inner links are integral plastic structures of self-lubricating wear-resistant material, including a pair of side plates, a pair of bushing means extending between said plates and concentric with said transverse axes, and an outwardly projecting part at the side margin of each of the side plates extending along the central part of said side plates between the end edges of said adjacent outer links. The end edges of the metallic outer links and the projecting parts of the plastic structure are in the form of an arc of a circle concentric with the adjacent transverse axis. The thickness of the projecting part corresponds to the thickness of said outer links to form a substantially continuous sliding contact area along each side of the link chain.

Abstract: Load tester for electronic components which has a plurality of shelves mounted on shelf frames movable in a horizontal circulation in an endless array entirely housed in a high temperature compartment. The drive mechanism for circulation is positioned outside of the compartment. Current is fed from an AC feed rail to individual rectifiers for each frame mounted outside of the compartment by individual current-collection trolleys. The current is then fed into the compartment to contact elements on each shelf.

Abstract: A two-handed robot device in which a hand supporting frame, which is moved to a position to grasp or release a workpiece by indexed rotation of a wristlike member, is provided with a first hand fixed on one side of the supporting frame, a striker which moves back against a spring force when touching a workpiece to be grasped by the first hand, a first detector which is made to operate by the backward movement of the striker, a second hand having its base portion fitted pivotally on the other side of the supporting frame so that it can be tilted from an engagement position toward the supporting frame and which is actuated toward the engagement position by a spring, and a second detector which is made to operate by said tilting movement of the second hand, and in which the movement of the first hand when approaching a workpiece and the movement of the second hand when approaching a workpiece stand are stopped according to the detection signals of the first and second detectors respectively.

Abstract: A sheet metal pulley having a generally circular base with an upstanding circumferential flange. The flange is formed to provide teeth for engaging a toothed belt. The outer tooth sections are separated by tooth bottom sections and these sections are interconnected by intermediate walls. Reinforcing ribs extend circumferentially on the inside of the outer tooth sections between the intermediate walls on either side thereof. This patent also discloses a method for cold-forging this pulley from a sheet metal cup-like member.

Abstract: A pallet conveying system comprising pallet guide rails supported on a frame, a driving shaft extending along the guide rails, motors for driving the driving shaft, a turntable mechanism disposed at the end of the pallet guide rails and having changeover rails alignable with the guide rails and a changeover driving shaft connectable to the driving shaft, a driven roller pivotally attached to the underside of a pallet and pressed against the circumference of the driving shaft with the axis of rotation thereof inclined with respect to the axis of the driving shaft, levers projecting from the front and the rear ends, respectively, of the pallet for causing the axis of rotation of the driven roller to be moved parallel to the axis of the driving shaft when the levers are retracted, and pallet stopping and positioning mechanisms each disposed at a predetermined position on the guide rails and adapted to cause the axis of rotation of the driven roller to be approximately parallel to the axis of the driving shaft an