| 摘要 |
PROBLEM TO BE SOLVED: To provide a rail clamp device that can realize large holding force by converting force by running-away of a moving structure into force for pressure-contacting a rail.SOLUTION: A pair of swing arms 11 and 11 which open and close in forward and backward travelling directions are pivoted to a travelling truck 3 that travels on a rail R, the swing arms 11 and 11 are elastically energized in a closed direction with a coil spring 8, and a pair of left and right wedge-shaped brake shoes 7 and 7 which can be freely press-contacted with side faces Rb and Rb of a head part of the rail R are held in lower end parts 11b of the swing arms 11, so that the wedge-shaped brake shoes 7 and 7 are inserted in a space between the rail R and the travelling truck 3 by elastically energizing force of the coil spring 8 to be brought into a preparatory clamp state. Further when the travelling truck 3 starts to run away, the wedge-shaped brake shoes 7 and 7 at a front side in a direction of the running-away are inserted deeply into the space between the rail R and the travelling truck 3 to be switched into a full clamp state for preventing running-away, so that force by which the shoes are press-contacted with the side faces Rb and Rb of the head part of the rail R is increased.SELECTED DRAWING: Figure 5 |
