Abstract: A robot arm with high productivity capable of preventing a decelerator from being damaged is provided. A robot arm according to an embodiment of the present disclosure is a robot arm in which a second member is rotationally coupled to a first member via a decelerator that accommodates lubricant therein, the robot arm including: a circulation path in which the lubricant is circulated via the decelerator; a storage part that is arranged in the circulation path and stores the lubricant; and an actuator configured to circulate the lubricant, in which the storage part is provided with a filter for capturing impurities in the lubricant in such a way that the filter covers an outlet of the lubricant in the storage part.

Abstract: A robot arm with high productivity capable of preventing a decelerator from being damaged is provided. A robot arm according to an embodiment of the present disclosure is a robot arm in which a second member is rotationally coupled to a first member via a decelerator that accommodates lubricant therein, the robot arm including: a circulation path in which the lubricant is circulated via the decelerator; a storage part that is arranged in the circulation path and stores the lubricant; and an actuator configured to circulate the lubricant, in which the storage part is provided with a filter for capturing impurities in the lubricant in such a way that the filter covers an outlet of the lubricant in the storage part.

Abstract: A method is for molding a gas hydrate pellet for improving convenience of handling of a natural gas hydrate during transportation and storage, and thereby improving the practical use of the natural gas hydrate. Gas hydrate slurry is fed in a compression chamber, and pressure and compression are applied to the gas hydrate slurry by advancing a compression plunger. At that time, a stroking speed of the compression plunger is set minimum, preferably less than a value expressed by a stroke length of the compression plunger at compression×10?2 (m/min. By advancing the compression plunger at low speed, binding between particles of the gas hydrate is tightened, thereby the gas hydrate pellet with increased shearing strength can be molded.

Abstract: A method is for molding a gas hydrate pellet for improving convenience of handling of a natural gas hydrate during transportation and storage, and thereby improving the practical use of the natural gas hydrate. Gas hydrate slurry is fed in a compression chamber, and pressure and compression are applied to the gas hydrate slurry by advancing a compression plunger. At that time, a stroking speed of the compression plunger is set minimum, preferably less than a value expressed by a stroke length of the compression plunger at compression×10?2 (m/min). By advancing the compression plunger at low speed, binding between particles of the gas hydrate is tightened, thereby the gas hydrate pellet with increased shearing strength can be molded.

Abstract: An articulated robot capable of reducing dead space while maintaining a wide operating area and simplifying a power transmission system necessary for moving each joint. A plurality of joint arms A1 to A7 are connected via first rotating shafts 15, 15A, and 15B as horizontal rotating shafts and via second rotating shafts 32, 32A, and 32B as inclined rotating shafts alternately. A motor M for driving the rotating shaft and a speed-reducing mechanism are provided for each rotating shaft.

Abstract: An articulated robot capable of reducing dead space while maintaining a wide operating area and simplifying a power transmission system necessary for moving each joint. A plurality of joint arms A1 to A7 are connected via first rotating shafts 15, 15A, and 15B as horizontal rotating shafts and via second rotating shafts 32, 32A, and 32B as inclined rotating shafts alternately. A motor M for driving the rotating shaft and a speed-reducing mechanism are provided for each rotating shaft.

Abstract: When a welding tip is moved from one welding point to a successive welding point, a robot and a welding gun are operated simultaneously with each other during a first time period between an issue of a pressurizing start signal and finish of the pressurizing, and again during a second time period between an issue of a depressurization signal and finish of the depressurization so that a pressurization time period t.sub.1 and a depressurization time period t.sub.2 are eliminated from a welding cycle time and the welding cycle time is shortened. A welding gun which includes a servo motor and a ball screw for converting a rotation of the servo motor to a stroke of the welding tip is used, and the stroke of the welding tip is counted as one axis of the robot, and the welding tip motion is controlled by a robot controller.