| 摘要 |
PURPOSE:To avoid the danger of a machine body falling down sidelong to be caused with the one side effective phenomenon of a brake due to forgetting the mutual connection of brake pedals by making constitution in which right and left brake pedals are connected to each other in a normal state but a connecting lock device is released when steering at more than a predetermined angle is conducted. CONSTITUTION:A connection-engagement portion 50 having an oblong hole 48 is formed at the longitudinal middle portion of a rod 47, and a pin 54 provided at the middle portion of a pitman arm 52 is idly put into the oblong hole 48. When a machine body is made to advance straight, a sleeve is not moved, and when the machine body is being made to turn by rotating a steering wheel 12 large, the pin 54 is stoppingly engaged with the end portion of the oblong hole 48 and the rod 47 is moved longitudinally. As a result, the sleeve is turned and a connection rod is rotated to a release position, and the stepping-on operation of a brake pedal 9 on a turning direction side is made possible. Thus, right and left brake pedals 9 are, in a normal state, connected to each other, and only when turning is conducted by operating the steering wheel 12, the stepping-on operation of a one side brake pedal 9 is made possible. |
