A telescopic tube guide sleeve and a telescopic tube escalator

Abstract

The invention provides an extension tube guide sleeve and an extension tube ladder. The guide sleeve comprises a first stop baffle, a second stop baffle, a sealing ring, a guide sleeve body and an air hole. The first stop baffle and the second stop baffle are connected to the outer side of the guide sleeve body and form a groove. The sealing ring and the air hole are both arranged in the groove. The height of the sealing ring is smaller than the width of the groove. The principle of air compression supercharge is used. During drawing, an air valve is opened for air suction to reduce the pressure; and during contraction, the air valve is closed, and air is compressed to increase the pressure, so that it is ensured that the ladder slides downwards slowly during contraction, hands of a person can leave the ladder with enough time, and risks of hurt are avoided. In the working period, supporting parts are used for supporting, stability and convenience are achieved, and the extension function of the ladder can be played to the greatest extent through an extension tube. The height of the sealing ring is smaller than the width of the groove, and the safety air pressure is increased during downward sliding, so that safety is higher, and the abrasion-resistant sealing ring can purely slow the falling speed.

Description

technical field [0001] The invention belongs to the field of climbing tools, and in particular relates to a telescopic tube guide sleeve and a telescopic tube escalator. Background technique [0002] A common ladder is a single ladder frame structure, which includes two ladder bars arranged parallel to each other and a cross bar spanning between the two ladder bars, and the cross bar serves as a supporting step. When the ladder with this single ladder frame structure is in use, since it has no fixed structure, it needs to lean against the support to stand, which is easy to topple over and has low safety in use. In order to enhance the use safety of the ladder, a herringbone ladder has appeared. However, when the ladder is in use, the two ladder frames need to be opened and supported on the ground, which requires a large working space. In addition, the use heights of the above two kinds of ladders are fixed, so that their use occasions are greatly limited. When it is neces...

AI Technical Summary

Problems solved by technology

However, when the ladder is in use, the two ladder frames need to be opened and supported on the ground, which requires a large working space

In addition, the use heights of the above two kinds of ladders are fixed, so that their use occasions are greatly limited

When it is necessary to take and place high objects, a longer ladder needs to be used. Due to its large size and high center of gravity, the longer ladder is less safe to use, and it is inconvenient to carry, and it takes up more space during storage.

[0003] At present, there are many kinds of telescopic ladders in circulation in the market, but when they are retracted after being pulled out, there is a very big hidden danger in operation, that is, hands or fingers will be pressed when holding the ladder tube or pedals to shrink, if not Note that there is a risk of injury. The more common solution is to add rubber pads between the two pedals, but there is also the risk of being injured by the rubber pads, and it is not the most economical way

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