Three-linkage lifting ladder
A technology of elevators and ladders, applied in the field of ladders, can solve the problems of ladders not engaging with each other on the slideway, using too many materials for the outer ladders, wasting materials, etc.
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[0025] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.
[0026] see figure 1 The present invention includes upper ladder, middle ladder, lower ladder, slide block, lifting pulley device and reversing tooth device, and also includes hook 9 installed on the top and bottom angle 10 at the bottom. The middle ladder is composed of two middle ladder sides 2 and several ladder shelves 4, the lower ladder is composed of two lower ladder sides 3 and several ladder shelves 4, and the ladder shelves 4 penetrate into the ladder sides at equal intervals Riveted with the ladder side, each floor has a single ladder.
[0027] see image 3 , Figure 4 , the upper ladder is behind the middle ladder, the middle ladder is after the lower ladder, the width of the lower ladder is the same as that of the upper ladder, and ...
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