| 摘要 |
PURPOSE:To prevent a container from falling suddenly during rising by providing a control valve to be switched over in relation to the inclining operation of a dump frame on the way of a pipe connecting between the top chamber and the switch valve of an oil cylinder. CONSTITUTION:In a truck to load and unload a container 7, an oil cylinder 8 provided between a loading and unloading arm 5 and a subframe 2 can be operated to load or unload the container 7 respectively from on a chassis frame 1 onto the ground or from on the ground up to the frame 1. Meanwhile, when the container 7 is fast fastened on the dump frame 3, the container 7 is moved backward by the operation of the cylinder 8. Then, a control valve to be switched over in relation to the inclining operation of the frame 3 is provided on the way of a pipe connecting between the top chamber and the switch valve of the oil cylinder for preventing the container 7 from escaping from the catch of a catching arm 11 and falling suddenly during the dumping of the container 7. |
