| 摘要 |
PURPOSE:To provide an automatic device of high reliability regardless of the precision of the engineering works by causing the car to travel by supporting a part of the car on a movable support beam. CONSTITUTION:An electric drive car 7 is movably arranged at a side lower than a car travelling road 2, and a stay 8 is protruded from this car body 7. Wheel keep plates 26, 27, 28 and 29 are pivotally connected both sides at the upper end of the stay 8, whereby movable support beams 20 and 21 can be fitted rotatably in the direction attachable or detachable to or from the travelling road 2, and support wheels 22 and 23 are provided at one-ends of support wheels 22 and 23. A part of a vehicle such as a front wheel a of a car is supported on movable support means 20 and 21 constructed as described above, and the car travels in a tunnel. According to the above described construction it is possible to obtain such a traction device of high relianility that even when the manufacturing precision of the engineering works is relaxed, the device can withstand the use and also can continue to precisely pull the car. |
