Falling preventing device of lifting type scaffold

Abstract

The invention relates to a falling preventing device of a lifting type scaffold, and belongs to the technical field of building construction. The falling preventing device of the lifting type scaffold comprises a support base with a vertical positioning side; the support base supports a horizontal fixed shaft of a loop spider gear; a key groove which runs through vertically is formed in the middle part of the fixed shaft; the key groove is provided with a locking key which forms a movable pair together with the key groove; the inner hole of the spider gear is provided with a spaced ratchet recess which is joined through an inner hole arc-shaped section; the ratchet recess is composed of a falling locking end and a curve transition section; a pawl head matching with the locking end of the ratchet recess is arranged on the upper end of the locking key, and a contact head is arranged on the lower end of the locking key; when the pawl head corresponds to the position of the locking end, the contact head corresponds to the position of the transition section; when either the pawl head or the contact head stretches out of the key groove, the other one is shrunk into the key groove. The falling preventing device of the lifting type scaffold plays a locking role by utilizing gravity and weightlessness conversion when the pawl falls rapidly. Therefore, the falling preventing performance can be always steady and reliable even the falling preventing device of the lifting type scaffold is used for a long time.

Description

technical field [0001] The invention relates to a safety device, in particular to a lifting type scaffolding anti-falling device, which belongs to the technical field of building construction. Background technique [0002] In order to ensure construction safety, anti-fall devices are generally used in building construction. For example, Chinese patents with application numbers 200980000197.6, 201210105256.X, and 201210267615.1 respectively disclose several anti-falling devices. However, these devices are not suitable for fall protection of elevating scaffolds. [0003] The search found that the Chinese patent application number 200810068257.5 discloses a fall prevention device. The device includes a guide seat connected to a slide sleeve of the guide rail. Interval cross bars are arranged on the guide rail. The anti-falling positioning wheel is provided with a clutch device between the wheel body of the anti-falling positioning wheel and the shaft seat of the anti-falling ...

AI Technical Summary

Problems solved by technology

Although this device is suitable for lifting scaffolding, its clutch device draws on the structure of overrunning clutch, and it usually needs to install elastic parts to ensure self-locking during impact movement. The wear of the friction surface of the lock makes it difficult to maintain the original anti-drop performance

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