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    • 2. 发明授权
    • Joint for foldable aluminum ladders
    • 可折叠铝梯的接头
    • US4666327A
    • 1987-05-19
    • US909595
    • 1986-09-22
    • George Su
    • George Su
    • E06C1/32F16D1/00
    • E06C1/32Y10T16/54024Y10T16/540254Y10T16/540256Y10T403/18Y10T403/32361
    • A joint for foldable aluminum ladders comprising a first base, a second base, a control plate and a selecting means. The second base has a middle plate inserted between two parallel plates which are connected at the end of the first base. The control plate is inserted between one of the parallel plates and the middle plate. The parallel plates, middle plate and control plate each have a central hole to allow a sleeve to be inserted therethrough. The parallel plates, middle plate and control plate also have apertures which lay some distance along the edges. The selecting means has a fixing link inserted through the sleeve and an inserting link which is shorter than the fixing link. A compressible spring is disposed around the lower end of the fixing link and a nut is secured at the threaded portion of the fixing link. When the selecting means is pulled outwardly, the legs of the ladder can be freely rotated to adjust the angle of the ladder, then the angle of the ladder is fixed with the inserting link being inserted through the most appropriate apertures of the first base, second base and control plate.
    • 用于可折叠铝梯的接头,包括第一基座,第二基座,控制板和选择装置。 第二基座具有插入在两个平行板之间的中间板,它们连接在第一基座的端部。 控制板插入在平行板和中间板之间。 平行板,中间板和控制板各自具有中心孔以允许套筒插入其中。 平行板,中间板和控制板也具有沿着边缘放置一定距离的孔。 选择装置具有通过套筒插入的固定连杆和比固定连杆短的插入连杆。 可固定弹簧设置在固定连杆的下端周围,螺母固定在固定连杆的螺纹部分。 当选择装置被向外拉时,梯子的腿可以自由旋转以调节梯子的角度,然后梯子的角度被固定,插入连杆插入通过第一底座的最适当的孔,第二 基板和控制板。