Foldable combination ladder

• Main Authors: WANG WEIGUO, ZHANG XUGUO, GENG FAWANG, CHEN ZHIGANG, YANG DONGXIANG
• Format: Patent
• Language: Chinese; English
• Published: 19.02.2014
• Subjects: DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; FIXED CONSTRUCTIONS; LADDERS

The invention discloses a foldable combination ladder. The combination ladder comprises a ladder frame body. The ladder frame body comprises ladder poles used for supporting, and horizontal treading bars disposed on the ladder poles. The ladder frame body is in a herringbone shape, or a linear shape, or an L shape, or an n shape, or a suspending shape like an inverted Chinese character 'yi'. The ladder frame body comprises a main ladder frame, an assistant ladder frame and a bearing plate. The bearing plate and the assistant ladder frame are respectively closed to or disposed at two ends of the ladder poles of the main ladder frame. The assistant ladder frame comprises a plurality of short ladder frames. The short ladder frames are connected through first connecting devices in a liner-shape connection or an angle-form connection. The assistant ladder frame and the main ladder frame are connected by a second connecting device or a third connecting device. The combination ladder has reasonable structure, carryi