| 主权项 |
1. A scaffold comprising:
a first end frame assembly having a first vertical rail with holes and a first caster assembly, a second vertical rail with holes and a second caster assembly, and a horizontal rung that is attached between the first and second vertical rails; a second and frame assembly having third and fourth vertical rails with holes and a horizontal rung attached therebetween; a first horizontal side brace assembly having a first vertical channel with holes, a second vertical channel with holes, a first horizontal beam connecting said vertical channels, a guard rod extending downwardly from the first beam and directly connected between the first beam and the first vertical channel, an L-shaped locking pin formed by a first portion having a major length extending substantially orthogonally to a major length of a second portion of the locking pin, wherein the first side brace assembly is supported by the first and third vertical rails of the first and second end frame assemblies, and the first portion of the locking pin is configured to removably pass through holes of the first vertical rail and the first vertical channel to adjustably lock the first side brace assembly at different heights along the first end frame assembly; a second side brace assembly supported by and extending between the second and fourth vertical rails of the first and second end frame assemblies; all elements of the guard rod, the first portion of the locking pin, the vertical channels, the first vertical rail, the third vertical rail and the first beam lie within and define a first vertical plane; all elements of the second vertical rail, the fourth vertical rail and the second side brace assembly lie within and define a second vertical plane that is substantially parallel to the first vertical plane; and the major length of the first portion of the locking pin is configured to pivot about a horizontal axis which only extends within the first vertical plane so that the second portion of the locking pin moves towards the second vertical plane to be positioned into a space located between said vertical planes, wherein the guard rod is positioned below the first portion of the locking pin a distance less than the major length of the second portion of the locking pin and the first beam is positioned above the first portion of the locking pin a distance less than the major length of the second portion of the locking pin so that the locking pin is directly blocked by one of said first horizontal beam and said guard rod when the second portion of the locking pin is moved in a direction away from said second vertical plane, and wherein the locking pin is incapable of moving beyond an opposite side of said first vertical plane with respect to said second vertical plane. |
