Ladder apparatus adapted for a scaffold

Abstract

A ladder apparatus adapted for a scaffold is disclosed. The ladder apparatus includes a ladder, two top connection components disposed at a top of the ladder, two bottom connection components disposed at a bottom of the ladder, and two platform assemblies connecting the ladder. The ladder includes two lateral rails and a plurality of step shelves arranged between the rails. Each platform assembly has a platform, two fasteners connected respectively to opposite ends of an external side of the platform, two straddlers connected respectively to opposite ends of an internal side of the platform, and two retainers protruding respectively from two lateral sides of the platform. The ladder connects the internal sides of the two platform assemblies via the top and bottom connection components respectively. The platform assemblies stride over and are against two lateral stringers of the scaffold via the straddlers and join the scaffold via the fasteners. Hence, the top and bottom of the ladder apparatus are served as stages for operators standing on and doing construction jobs.

1 . A ladder apparatus adapted for a scaffold, comprising two platform assemblies and a ladder connecting with the platforms, wherein:
 the ladder includes two lateral rails being slant and paralleled to each other, a plurality of step shelves connecting the lateral rails and spaced at intervals between the rails, two bottom connection components disposed at a bottom of the ladder, and two top connection components disposed at a top of the ladder; and   each of the two platform assemblies has a platform, two fasteners connected respectively to opposite ends of an external side of the platform, two straddlers connected respectively to opposite ends of an internal side of the platform, and two retainers protruding respectively from two lateral sides of the platform;   each of the two retainers are arranged between the respective fastener and straddle; the ladder connects the internal sides of the two platform assemblies via the top and bottom connection components respectively; the two platform assemblies stride over and are against two lateral stringers of the scaffold via the straddlers and the retainers, and join the scaffold via the fasteners.   
     
     
         2 . The ladder apparatus according to  claim 1 , wherein the platform includes a platform, an external joist and an internal joist; the external and internal joists are arranged next to external and internal sides of the platform; the two fasteners are disposed at opposite ends of the external joist, and the two straddlers are disposed at opposite ends of the internal joist. 
     
     
         3 . The ladder apparatus according to  claim 1 , wherein the two retainers are arranged in a collinear manner. 
     
     
         4 . The ladder apparatus according to  claim 2 , wherein each straddler has an end folded downwardly. 
     
     
         5 . The ladder apparatus according to  claim 2 , wherein each bottom connection component is U-shaped and arranged at a bottom end of each rail to straddle over and grasp the internal joist of the relative platform assembly. 
     
     
         6 . The ladder apparatus according to  claim 1 , wherein each fastener includes a casing and an insertion member fitting in the casing; the casing has an opening recessed from a front, and two slits respectively formed at top and bottom portions of the casing; the two slits correspond to each other and communicate with the opening; the insertion member has a top end, which is wider than a bottom end thereof, the insertion member is capable of penetrating downwardly and passing the slits of the casing via the bottom end thereof. 
     
     
         7 . The ladder apparatus according to  claim 2 , wherein each fastener includes a casing and an insertion member fitting in the casing; the casing has an opening recessed from a front, and two slits respectively formed at top and bottom portions of the casing; the two slits correspond to each other and communicate with the opening; the insertion member has a top end, which is wider than a bottom end thereof, the insertion member is capable of penetrating downwardly and passing the slits of the casing via the bottom end thereof. 
     
     
         8 . The ladder apparatus according to  claim 1 , wherein each of the top connection components includes a hook connected to a top end of each rail, and a clip member pivoted to a lateral side of the hook and being swung next to the hook; the two top connection components clasp the internal joist of the relative platform assembly. 
     
     
         9 . The ladder apparatus according to  claim 8 , wherein the hook has a notch recessed from a top face thereof. 
     
     
         10 . The ladder apparatus according to  claim 9 , wherein the notch is formed with an included angle, which is appropriately 90 degree. 
     
     
         11 . The ladder apparatus according to  claim 2 , wherein each of the top connection components includes a hook connected to a top end of each rail, and a clip member pivoted to a lateral side of the hook and being swung next to the hook; the two connection components clasp the internal joist of the relative platform assembly. 
     
     
         12 . The ladder apparatus according to  claim 11 , wherein the hook has a notch recessed from a top face thereof. 
     
     
         13 . The ladder apparatus according to  claim 2 , wherein the platform includes at least one ledger transversely arranged at bottoms of the internal and external joists and a bottom of the step shelf for connecting these three all together. 
     
     
         14 . A ladder apparatus adapted for a scaffold, comprising two platform assemblies and a ladder connecting with the platforms, wherein:
 the ladder includes two lateral rails paralleled to each other, a plurality of step shelves connecting the lateral rails and spaced at intervals between the rails, two bottom connection components disposed at a bottom of the ladder, and two top connection components disposed at a top of the ladder; and   each of the two platform assemblies has a platform, two fasteners connected respectively to opposite ends of an external side of the platform, and two straddlers connected respectively to opposite ends of an internal side of the platform;   the ladder connects the internal sides of the two platform assemblies via the top and bottom connection components respectively; the two platform assemblies stride over and are against two lateral stringers of the scaffold via the straddlers, and join the scaffold via the fasteners.   
     
     
         15 . The ladder apparatus according to  claim 14 , wherein the platform includes a platform, an external joist and an internal joist; the external and internal joists are arranged next to external and internal sides of the platform; the two fasteners are disposed at opposite ends of the external joist, and the two straddlers are disposed at opposite ends of the internal joist. 
     
     
         16 . The ladder apparatus according to  claim 14 , wherein each of the top connection components includes a hook connected to a top end of a respective rail, and a clip member pivoted to a lateral side of the hook and being swung next to the hook; the hook has a notch recessed from a top face thereof, the two top connection components clasp the internal joist of the relative platform assembly. 
     
     
         17 . The ladder apparatus according to  claim 15 , wherein each of the top connection components includes a hook connected to a top end of a respective rail, and a clip member pivoted to a lateral side of the hook and being swung next to the hook; the hook has a notch recessed from a top face thereof, the two top connection components clasp the internal joist of the relative platform assembly.