The metal make ladder combined use trestle which expands the heaven field area and decreases the enclosing space

摘要

(57) Abstract Objective Heaven field 25 aspects of metal make ladder combined use trestleIt expands the product and job and direction conversion of the worker on the heaven field is possibleSecurity is raised due to especially, and the heaven field area 25 is expandedDegradation of the enclosing efficiency which it occurs with is solved. Constitution Join axis 24 as a center the frameThe step 15 which is installed in heaven field 25 of 1, 2 and 3 and 4It is between, L die metallic parts installation inside 7, 8 and 9 and 10And others the re it is bracket on 18, 19 and 20 and 21 the pedalTo install 16 and 17 and to expand the area of heaven field 25, the frameFixed metallic parts 11, 12 and step 5 and 6 shift on top of 3 and 4Fixed it does, as for fixed metallic parts 11, 12 and L die metallic parts 7 and 8 revolving fulcrum 1To be supported by 3, 14 and stop metallic parts 22, thisSo it is possible to make the ladder and the trestle. Opening you stop metallic parts 2Frame 3 of 3 and 4 sides stop metallic parts 22 are removed, the frameWhen 3 and 4 is pulled to lower direction, it becomes a state where you can enclose.