| 摘要 |
PURPOSE: A scissor type lift is provided to stably lift heavy objects and to lower the lift at most by overlapping shafts. CONSTITUTION: A scissor type lift comprises a primary shaft(10), a secondary shaft(20), a third shaft(30), a secondary shaft sleeve(23), and a third shaft sleeve(33). The secondary shaft sleeve and the third shaft sleeve connect the bottom outer face of the secondary shaft and the top inner face of the primary shaft and the bottom outer face of the third shaft and the top inner face of the secondary shaft to prevent bending deflection when the secondary shaft and the third shaft are protruded to the hilt. An inward protrusion(26) is formed on the top inner face of the secondary sleeve so that the secondary shaft sleeve can support the secondary shaft inside the primary shaft in a state where the inward protrusion is hung on an outward protrusion(25) formed on the bottom outer face of the secondary shaft. An inward protrusion(36) is formed on the top inner face of the third shaft sleeve so that the third shaft sleeve can support the third shaft inside the secondary shaft in a state where the inward protrusion is hung on an outward protrusion(35) formed on the bottom outer face of the third shaft.
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