Adjusting pedal type working ladder

Abstract

The invention discloses an adjusting pedal working ladder which comprises an outer frame, an inner frame, pedals and supporting wheels. The outer frame and the inner frame are each composed of two side plates, and the pedals are vertically connected with the outer frame and the inner frame; the front ends of the two sides of the pedals are movably connected with the two side plates of the outer frame through connecting pieces, the rear ends of the two sides of the pedals are movably connected with the two side plates of the inner frame through connecting pieces, and the supporting wheels are installed at the bottom of the pedal at the lowest end. Automatic adjustment of the pedals is realized by utilizing the parallelogram side-to-side parallel principle, so that the pedals are automatically kept horizontal and adaptive to height change, potential safety hazards caused by personnel passing in a lifting platform are effectively solved, the structure is novel, connection is simple, use is convenient, and the working efficiency is effectively improved.

Description

technical field [0001] The invention relates to a working ladder, in particular to an adjustable pedal type working ladder. Background technique [0002] In order to facilitate the smooth up and down passage of personnel in the lifting platform, it is necessary to set up a dedicated up and down channel, which is called a working ladder. Since the height of the lifting platform needs to be adjusted within a certain range, the height of the working ladder should also change accordingly. The working ladder is generally composed of a frame, pedals and handrails. The setting of the width of the pedals, the height between the pedals and the height of the handrails should be able to meet the safe and smooth passage of the climbers. [0003] There are generally three types of working ladders set on the lifting platform, which are fixed, floating and self-adjusting pedal working ladders. [0004] Such as figure 1 , 2 As shown, the fixed working ladder combines the frame, pedals a...

AI Technical Summary

Problems solved by technology

The lifting platform is at the lowest height, and the lower end of the bottom pedal is closer to the ground, which is more convenient for people to climb the ladder; when the lifting platform rises to a certain height range, the bottom pedal of the working ladder is far away from the ground, and it is extremely inconvenient for people to go up and down

[0005] The floating working ladder is also composed of pedals, frame and handrails. The upper end of the frame is hinged to the lifting platform, and the lower end is supported by universal wheels on the ground. With the change of the height of the lifting platform, the tilt angle of the floating working ladder changes constantly. All the pedals If there is a tilt, the tread surface of the pedal cannot be kept in a horizontal state, and there is a potential safety hazard of unstable pedaling

Although the pedal can be replaced by a round tube to eliminate the tilting phenomenon, but at the same time there will be safety hazards due to the reduced contact surface of the pedal and easy slipping, which cannot meet the purpose of safe passage

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