| 摘要 |
To solve the problem of direction change or of safety when there is an excessive load in subsidiaries(16), the equipment is so constituted that the power feeding gear part(56) is fed with the power from the power axis(50), the 4 drive part(50) possesses oil embedded, and the frame part(59) and the hydraulic pressure adjustment stand(81) apply lifting and tilting to the front face subsidiaries(74) which are made to be removed. And further the frame part(59) of which joint part(61) is fastened to the backup stand(54) and to the head(53) to be assembled, having the breadth length stand(62) welded over the joint part(61) so the horizontal backup stand(63) and the hinge point backup stand(64) as to be integrally combined.
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