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Telescoping ladder

A technology of ladders and door-shaped ladders, applied in the direction of ladders, buildings, building structures, etc., to achieve the effect of efficient operation

Inactive Publication Date: 2012-05-23
ALINCO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Compared with the telescopic ladder widely used in the past, the telescopic ladder provided with the gap maintaining mechanism related to the proposal of the present applicant has significantly improved safety when the ladder is retracted, but the operability under actual use conditions is further detailed. After verification, it can be seen that there is room for further improvement

Method used

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Examples

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Embodiment Construction

[0060] One embodiment of the telescopic ladder of the present invention will be specifically described below with reference to the drawings. Such as figure 1 As shown, its basic structure of this telescopic ladder is the same as that of widely used ladders in the past. Between the upper ends of a pair of cylindrical pillars 1 and 1 on the left and right, a plurality of door-shaped ladder parts 10 with pedals 3 crossed by joint parts 2, The tubular pillars 1 are fitted in a sleeve-like manner to form a ladder with multiple steps up and down (12 steps in the figure). Moreover, in each door-shaped ladder member 10 except the uppermost stage, lock release members 53 in the locking device 5 described later are arranged on the left and right sides of the front surface 3a of the step 3 (refer to figure 2 (b), image 3 (b)) slide operation piece 53a. In addition, the door-shaped ladder member 10 at the lowest stage is also used as a reinforcement, and a step 4 is also placed hori...

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PUM

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Abstract

The invention provides a telescoping ladder which can reliably prevent finger pinching when contracting the ladder and has excellent ladder telescoping operation safety. A plurality of door-shaped ladder parts (10) of cylindrical pedals (3) are crossly arranged between upper end parts of a left cylindrical pillar (1) and a right cylindrical pillar (1) through joint parts (2) to make the cylindrical pillars (1) configure up-down multiple levels in a mutual sleeve-embedding mode, locking devices (5) which maintain the upper door-shaped ladder parts (10) be not elevated during stretching the ladder are arranged in each joint part (2), and sliding operation sheets (53a) of locking devices (5) expose to the outside of side faces of left sides and right sides of the cylindrical pedals (3); each joint part (2) is the integration of a ring part (21) fixed on one cylindrical pillar (1) in an onlay mode, an inlayed frame part (22) inlayed to one pedal (3), and an upper adapting part (23) upward protruding from the inlayed frame part (22) in the ring part (21); and the upper adapting part (23) is abutted to the lower surface of the joint part (2) in the upper door-shaped ladder part (10), so a gap (t1) is formed between the pedals (3) of each two adjacent door-shaped ladder parts (10), and a gap (t2) is formed between outer sides of the ladder in ring parts (21) of each two adjacent joint parts (2).

Description

technical field [0001] The present invention relates to an improvement of a telescopic ladder. The telescopic ladder is a telescopic ladder in which a plurality of door-shaped ladder parts with pedals crossed between the upper ends of a pair of left and right cylindrical pillars are sleeved together with the cylindrical pillars. . Background technique [0002] Generally, such as Figure 9 As shown, the structure of this telescopic ladder is as follows: between the upper ends of each left and right pair of cylindrical pillars 1 and 1, the pedal 3 is crossed by a joint part 2 and becomes a door shape, and the diameter of the upper cylindrical pillar 1 A plurality of smaller gate-shaped ladder members 10 constitute a ladder with multiple steps up and down (twelve steps in the figure) such that cylindrical pillars 1 are fitted in a sleeve-like manner. And, in such a telescopic ladder, by the locking device (not shown) built in the joint part 2 or the step 3 of each gate-shaped ...

Claims

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Application Information

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IPC IPC(8): E06C1/12E06C1/22E06C7/00E06C7/50E06C7/08E06C7/06E06C7/02
CPCE06C1/125E06C7/003
Inventor 松本一郎增野刚
Owner ALINCO