| 摘要 |
PROBLEM TO BE SOLVED: To simultaneously realize the braking force characteristic and a braking force distribution ratio of a vehicle adaptable in loading a crane and the braking force characteristic and a braking force distribution ratio adaptable in traveling of only a truck. SOLUTION: This truck crane comprising a braking circuit for supplying the braking pressure corresponding to a depression angle of a brake pedal to a brake chamber of a wheel, further comprises valve means 15a-15d switchable between a state of decompressing the braking pressure to the brake chambers 5i-5q, and a state of not decompressing the pressure, a means (20a, 20b and 21 in Fig. 3) for detecting a state of the truck crane of only the truck or a state of loading the crane, and means 16a-16d and 17a-17d for switching the valve means corresponding to a detecting signal of the detecting means.
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