| 摘要 |
PURPOSE:To decrease an upward protrusive amount of a jack cylinder, by swingably mounting the jack cylinder of an outrigger device to the point end of an overhung beam, internally moving and storing said cylinder in the overhung beam. CONSTITUTION:A jack cylinder 5 is pivotally mounted in a laterally swingable state by a swinging cylinder 7 to the point end part of an overhung beam 3 slidably fitted to a fixed box 2. While blocks 31, 32 are secured to the point end part of the beam 3, and a high located part 55a of a protruded part 55, protrusively provided in the jack cylinder 5, is engaged to an engaged hollow part 33, formed between the blocks 31, 32, when the cylinder is extended in a vertical attitude. Further a lock pin 8 is provided in the point ene of the beam through a spring 81. The pin 8 is protruded internally of the beam 3 and adapted to a low located part of the protruded part 55 at a vertically contracted attitude of the jack 5 when a top part 82 of the pin is slided on a cam surface 91 of a cam 9. |
