| 摘要 |
PURPOSE:To cope with the wide range of a pipe size and to improve running stability. CONSTITUTION:In a running truck 11 in a piping, upper and lower drive arms 15 and 16 are rotatably supported to a running truck body 12, having a drive motor, by means of drive shafts 13 and 14 and a pair of upper and lower drive wheels 19 and 22 are mounted on the one end thereof. Lower and upper driven wheels 29 and 32 are mounted on the other end, upper and lower driven arms 33 and 36 interlocking with the respective drive arms are rotatably supported to the running truck body 12 by means of a pin 35, and a pair of right and left driven wheels 41 are mounted on the one end thereof. Drive transmitting mechanism 23 which transmits the drive force of a drive motor to respective drive wheels is provided and removable drive cylinder 25 is arranged between upper and lower drive wheels. Further, an arcuate guide arm 71 is vertically and rockably arranged in front of the running truck body and a tool mounting part 73 is mounted on the arm movably in a longitudinal direction. |
