Abstract: To provide an engine unit support structure with excellent vibration damping performance and durability, the engine unit support structure (1) is provided with an engine unit (2) having an engine (22), a mounting base (3) for mounting the engine unit (2) thereon, and a plurality of elastic support bodies coupled to the engine unit (2) and the mounting base (3) to thereby support the engine unit (2), in which the plurality of elastic support bodies include a first elastic support body (4A) disposed under the lower surface (20) of the engine unit (2) in a position closest, than any other of the plurality of the elastic support bodies, to the rotation center of the output shaft of the engine (22) and three or more of second elastic support bodies (4B, 4B, . . . ), and the first elastic support body (4A) is disposed within a closed space X in plan view formed by interconnecting the centers of the neighboring second elastic support bodies (4B, 4B, . . . ).

Abstract: To provide an engine unit support structure with excellent vibration damping performance and durability, the engine unit support structure (1) is provided with an engine unit (2) having an engine (22), a mounting base (3) for mounting the engine unit (2) thereon, and a plurality of elastic support bodies coupled to the engine unit (2) and the mounting base (3) to thereby support the engine unit (2), in which the plurality of elastic support bodies include a first elastic support body (4A) disposed under the lower surface (20) of the engine unit (2) in a position closest, than any other of the plurality of the elastic support bodies, to the rotation center of the output shaft of the engine (22) and three or more of second elastic support bodies (4B, 4B, . . . ), and the first elastic support body (4A) is disposed within a closed space X in plan view formed by interconnecting the centers of the neighboring second elastic support bodies (4B, 4B, . . . ).

Abstract: A seal device is constituted of a plurality of seal tubes. After a connected-tube body having base members disposed at a fore end and a rear end is inserted into a fluid passage such as a tubular member, the seal tubes are expanded by injecting gaseous nitrogen into each of the seal tubes. The intermediate portions of the seal tubes along a longitudinal direction are press-fitted to the inner surface of the fluid passage over the entire circumference thereof, whereby the fluid passage is sealed. Since the connected-tube body is easily bent in the vicinity of a connecting base member between the tubes, the connected-tube body can be easily curved along the fluid passage, thus facilitating an operation for inserting the connected-tube body into the fluid passage and also enhancing a sealing property with respect to the fluid passage.

Abstract: A seal device is constituted of a plurality of seal tubes. After a connected-tube body having base members disposed at a fore end and a rear end is inserted into a fluid passage such as a tubular member, the seal tubes are expanded by injecting gaseous nitrogen into each of the seal tubes. The intermediate portions of the seal tubes along a longitudinal direction are press-fitted to the inner surface of the fluid passage over the entire circumference thereof, whereby the fluid passage is sealed. Since the connected-tube body is easily bent in the vicinity of a connecting base member between the tubes, the connected-tube body can be easily curved along the fluid passage, thus facilitating an operation for inserting the connected-tube body into the fluid passage and also enhancing a sealing property with respect to the fluid passage.