| 摘要 |
A traveling device traveling along an elongated tube or member has an elastic contractable body expanding in radial directions to cause a contractive force in axial directions when supplied with pressurized fluid into the body. Mounting members are connected to respective ends of the elastic contractable body, and elastic member are arranged between the mounting members causing force resisting to the contractive force of the elastic contractable body. An anchoring structure is fixed to the mounting members and expands when supplied with pressurized fluid into the anchoring members. In case of a large diameter column or tube, the traveling device comprises a plurality of elastic contractable bodies and a pair of frames having a shape and a size encircling the column or enclosed in the tube other than the components above described. With this arrangement, the traveling device is caused to travel along the elongated member or in the tube by supplying the pressurized fluid into and exhausting from the elastic contractable body in connection with alternate supplying the pressurized fluid into and exhausting from the anchoring member.
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