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Liftable V-ladder

A technology of lifts and herringbone ladders, which is applied in the direction of ladders, buildings, building structures, etc., can solve the problems of small lifting height, small height adjustment range of ladders or ladders, and height restrictions of ladder application places, etc., to achieve Convenient transportation and storage, small space occupation and convenient adjustment

Active Publication Date: 2010-05-12
冷鹭浩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The herringbone ladder is widely used as an independent ladder, but because the two fixed ladders can not be adjusted in the length direction, the herringbone ladder has the following disadvantages: it can only be used in places where the ground is level, and it can only be used in places where the ground is level, and it can only be used on steps or uneven places. The use of this ladder is greatly restricted
Although these several solutions all solve the shortcoming that the place of use is restricted by the ground, the height of the ladder or the ladder can be adjusted in a small range, but because the heightening ladders of these solutions can only be lifted downwards to be applied to the ladder. Or the ground is uneven, but it cannot be lifted upwards and protruded from the top of the fixed ladder, which makes the lifting height small, the height adjustment range of the whole ladder or the ladder is small, and the application place of the ladder is limited in height

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A liftable ladder, such as figure 1 , 2 , 3, 4, 5, 6, and 7, including fixed ladder 1, transitional ladder 2 and lift 3, forming a rotatable connection between the upper end of fixed ladder 1 and the upper end of transitional ladder 2, between the lift 3 and transitional ladder 2 The length of the transitional ladder 2 is about 1 / 3 of the length of the fixed ladder 1, and the length of the elevator 3 is about equal to the length of the fixed ladder 1.

[0048] like figure 1 , 8 As shown, the fixed ladder 1 includes two parallel fixed leg pipes 11 and several pedals 12 fixed between the two fixed leg pipes 11, and these several pedals 12 are horizontally arranged; as Figure 11 As shown, the horizontal cross-section of the fixed leg pipe 11 is R-shaped. The fixed ladder 1 is provided with a plurality of second fixing holes 13, the second fixing holes 13 are evenly spaced up and down and the axes are in a horizontal line, wherein each second fixing hole 13 runs throug...

Embodiment 2

[0061] The difference between this embodiment and Embodiment 1 is that: Figure 20 As shown, the horizontal cross-section of the fixed leg tube 11 is R-shaped; the structure of the transition leg tube 21 is the same as that of the fixed leg tube 11, and the horizontal cross-section is also R-shaped, and the R-shaped transition leg tube 21 The open end of the opening is a chute 23; the lifting leg pipe 31 is shaped like a mouth, and the lifting leg pipe 31 is a slide rail. The lifting leg pipe 31 is slidably connected in the slide groove 23 .

Embodiment 3

[0063] The difference between this embodiment and Embodiment 1 is that: Figure 21 As shown, the horizontal cross-section of the fixed leg tube 11 is in the shape of a mouth; the horizontal cross-section of the transition leg tube 21 includes a mouth part and a U-shaped part, wherein the sides of the mouth part and the sides of the U-shaped part coincide The opening of the U-shaped part shrinks inward, so that the inside of the U-shaped part forms a chute 23; the lifting leg tube 31 is shaped like a mouth, and the lifting leg tube 31 forms a slide rail. The lifting leg pipe 31 is slidably connected in the slide groove 23 .

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Abstract

The invention discloses a rise and fall herringbone step ladder, comprising a fixed ladder, a transition ladder and an escalator; wherein, the upper end of the fixed ladder is rotatablely connected with the upper end of the transition ladder; the escalator is vertically and rotatablely connected with the transition ladder. The fixed ladder and the transition ladder can separate and be positioned to form a step ladder, or fold and be positioned to form a normal ladder. The escalator can slide relatively to the transition ladder, so that the top end can extend out of the top end of the transition ladder or / and the lower end can extend out of the lower end of the transition ladder. The invention adopts the technical proposal that: the escalator can slide relatively to the transition ladder tomake the upper end extend out of the upper end of the transition ladder or make the lower end extend out of the lower end of the transition ladder, thus the height of the step ladder or the normal ladder is increased and the step ladder is suitable for various places no matter the places are not flat or stepped. The invention has the advantages of diversified adjustment functions and large heightadjustment range.

Description

technical field [0001] The invention relates to an independent ladder, in particular to a liftable ladder. Background technique [0002] Early herringbone ladders consisted of two fixed ladders and a positioning device between the two fixed ladders. The tops of the two fixed ladders formed a rotatable connection, and the two fixed ladders could be opened and positioned to form a herringbone ladder or folded Position to form a ladder. The herringbone ladder is widely used as an independent ladder, but because the two fixed ladders can not be adjusted in the length direction, the herringbone ladder has the following disadvantages: it can only be used in places where the ground is level, and it can only be used in places where the ground is level, and it can only be used on steps or uneven places. The use of this herringbone ladder is just restricted greatly. [0003] Someone has proposed a solution for the above-mentioned shortcomings: the herringbone ladder includes two fix...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E06C1/30E06C7/02
CPCE06C1/12E06C1/18E06C7/06E06C1/22
Inventor 冷鹭浩
Owner 冷鹭浩
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