An electric ascending and contracting ladder

Abstract

The invention provides an electric pull-up extending section ladder, belongs to the field of ladders and solves the problem that an existing bamboo section ladder becomes thin section by section whenbeing unfolded. The electric pull-up extending section ladder is characterized in that the two sides of a bottom support are correspondingly provided with left ladder tubes and right ladder tubes; each ladder tube is formed by combining circular tubes which are nested in sequence from big to small; the top parts above all associated ladder tubes are correspondingly provided with tube jacking buckles and jacking lock pits, while a lead screw is vertically erected in the center of the right ladder tube at the innermost side; through an intermediate gear, a gear at the lower end of the lead screwis engaged with a gear on a motor shaft for driving the lead screw to rotate; the lower part of the lead screw is sleeved with nuts on all the right ladder tubes; section sleeves are correspondinglybuckled to the upper parts of all the left and right ladder tubes, while a section sleeve of carrying out one section for multiple steps can also be arranged below the section sleeves of all the ladder tubes in a sleeved manner; all the section sleeves can be connected by corresponding transversal pedals; lock pin shafts are correspondingly arranged in the associated transversal pedals; and when ajacking force under each of unlocking handle is gone, the corresponding lock pin shaft can be pressed into a lock pin hole by a spring to realize buckling of the transversal pedals and ladder tubes.The electric pull-up extending section ladder provided by the invention has the advantage of being convenient to carry.

Description

technical field [0001] The invention belongs to the field of ladders, and in particular relates to an electric ascending and contracting ladder. Background technique [0002] In daily life and building construction, ladders are often used, and bamboo ladders and rope-ladders are all classified as ladders. [0003] But existing bamboo ladder and rope pull multi-section ladder all have following weak point: [0004] 1. Due to the shortcomings of the step-by-step bamboo ladder, the total strength of the ladder and the total height of the lift are limited due to its shortcoming of becoming thinner step by step; [0005] 2. Bamboo ladders are raised and contracted manually, so there must be a large gap between the outer diameter of each ladder tube and the joint sleeve, which will cause a large bend after the ladder is lifted and lowered; at the same time, manual lifting is in the process of operation. It is also easy to cause mistakes, which will lead to adverse consequences o...

AI Technical Summary

Problems solved by technology

[0004] 1. Due to the shortcomings of the step-by-step bamboo ladder, the total strength of the ladder and the total height of the lift are limited due to its shortcoming of becoming thinner step by step;

[0005] 2. Bamboo ladders are raised and contracted manually, so there must be a large gap between the outer diameter of each ladder tube and the joint sleeve, which will cause a large bend after the ladder is lifted and lowered; at the same time, manual lifting is in the process of operation. It is also easy to cause mistakes, which will lead to adverse consequences of damaging the ladder;

[0006] 3. The speed of the bamboo ladder is fast during the descent process, which is easy to cause accidents such as pinching hands;

[0007] 4. The closed height of the multi-section ladder pulled up by the rope is too long, which is not conducive to carrying; while the operation process of the rope-lifted ladder is complicated, and it is easy to cause the rope to slip or get stuck

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