Patent Number: 
Section: claims

1. A working apparatus for performing works on a structure, the apparatus comprising:a working equipment to be placed relative to the structure to perform a work;an operation mechanism adapted to actively move the working equipment relative to the structure; andan adhering/traveling module coupled to the operation mechanism and adapted to adhere to the structure so as to have a weight of the working apparatus borne by the structure and travel/move on the structure for positioning,wherein a part comprising a target of the work of the structure extends along a substantially horizontal line, andwherein the operation mechanism comprises:a rotary mechanism supporting the working equipment and adapted to rotate the working equipment around a horizontal axis running in parallel with the horizontal line;a rocking mechanism supporting the rotary mechanism and adapted to swing the rotary mechanism around the horizontal axis running in parallel with the horizontal line; anda vertical movement mechanism supporting the rocking mechanism and adapted to move the rocking mechanism up and down. 2. The working apparatus according to claim 1, wherein the structure is a structure located in a nuclear reactor pressure vessel and the working apparatus is adapted to operate in water with which the nuclear reactor pressure vessel is filled. 3. The working apparatus according to claim 1, wherein the operation mechanism is a single operation mechanism and the adhering/traveling module comprises two adhering/traveling modules coupled to opposite of sides the operation mechanism. 4. The working apparatus according to claim 1, wherein the working equipment comprises at least one selected from a group consisting of a visual inspection camera, a volume inspection ultrasonic sensor, an eddy current flaw detecting sensor, washing water discharging nozzle, a polishing brush, a grinding jig and a laser peening head. 5. The working apparatus according to claim 1, wherein the rotary mechanism comprises a rotary motor, a timing belt and a pulley. 6. The working apparatus according to claim 1, wherein the rotary mechanism comprises a rotary motor and a translation mechanism and the translation mechanism and the link comprises a slider crank mechanism. 7. The working apparatus according to claim 1, wherein the adhering/traveling module comprises:a thruster for causing the adhering/traveling module to adhere to a wall surface of the structure in water;a running wheel for causing the adhering/traveling module to travel a horizontal distance;a gauging mechanism for gauging the traveled horizontal distance;a ball caster fitted to a bottom surface of the adhering/traveling module, wherein the working apparatus has its weight borne by the ball caster;wherein the working apparatus is adapted to move horizontally along the wall surface. 8. The working apparatus according to claim 1, wherein mechanism constituting members and strength holding members are formed using a polymeric resin material. 9. A working method for performing works on a structure, the method comprising:bringing in a working apparatus having an operation mechanism, a working equipment, and an adhering/traveling module;having the working apparatus adhere to a wall surface of the structure and a weight of the working apparatus is borne by the structure;having the working apparatus travel and move a distance along the wall surface;having the adhering/traveling module gauge the traveled distance relative to the wall surface; andhaving the working apparatus perform a scanning operation on the structure,wherein a part comprising a target of the work of the structure extends along a substantially horizontal line, andwherein the operation mechanism comprises:a rotary mechanism supporting the working equipment and adapted to rotate the working equipment around a horizontal axis running in parallel with the horizontal line;a rocking mechanism supporting the rotary mechanism and adapted to swing the rotary mechanism around the horizontal axis running in parallel with the horizontal line; anda vertical movement mechanism supporting the rocking mechanism and adapted to move the rocking mechanism up and down. 10. The working method according to claim 9, wherein the structure is located in a nuclear reactor pressure vessel and the working apparatus is adapted to operate in water with which the nuclear reactor pressure vessel is filled.