CN113175204A

CN113175204A - Method for automatically preventing attached lifting scaffold from falling

Info

Publication number: CN113175204A
Application number: CN202110551922.1A
Authority: CN
Inventors: 朱若愚
Original assignee: Kunming Xizhao Technology Co ltd
Current assignee: Kunming Xizhao Technology Co ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2021-07-27
Anticipated expiration: 2041-05-20
Also published as: CN113175204B

Abstract

A method for automatically preventing an attached lifting scaffold from falling comprises the steps that anti-falling devices are arranged between a building wall (9) and an attached lifting scaffold frame body (10) every other floor height, and at least 3 anti-falling devices are arranged in the whole building; the anti-falling device comprises a horizontal central shaft (4), two ratchets (2) which are fixedly sleeved on the central shaft and have the same diameter and are provided with staggered ratchets, two rotating wheels (1) which are symmetrically and fixedly arranged on the outer sides of the ratchets and have the diameter larger than that of the ratchets, two anti-falling blocks (3) correspondingly arranged below the ratchets and two mounting seats (5) symmetrically arranged on the outer sides of the rotating wheels; the both ends of center pin are installed on the mount pad, the runner includes rim plate (1a) and equipartition in pinion rack (1b) of rim plate outer fringe, prevent weighing down the piece and be the asymmetric integral steel sheet of going up the hook in both sides. The invention can quickly prevent the attached lifting scaffold from accidentally falling in the lifting process, controls the falling distance of the scaffold body, and has simple and convenient operation, safety and reliability.

Description

Method for automatically preventing attached lifting scaffold from falling

Technical Field

The invention relates to the technical field of methods for preventing an attached lifting scaffold from accidentally falling in building construction.

Background

The attached lifting scaffold is a novel external scaffold which is developed at the beginning of the 20 th century, has a certain height, is attached to an engineering structure, depends on lifting equipment and a device of the attached lifting scaffold, climbs or descends along with the engineering structure layer by layer, is provided with an anti-overturning and anti-falling device, can change high-altitude operation into low-position operation, changes suspended operation into support body internal operation, has the obvious advantages of safety, convenience and the like, and is widely adopted in high-rise building construction.

The attached lifting scaffold mainly comprises an attached lifting scaffold body provided with a climbing frame guide rail, an attached support, an anti-overturning device, an anti-falling device, a lifting mechanism, a control device and the like. The anti-falling device of the attached lifting scaffold in the prior art can well play a role in preventing falling in the normal lifting process, but the anti-falling is difficult to realize in real time in the falling process. In the prior art, most of falling-preventing devices of the frame body are detached during the falling of the frame body in the engineering, and other auxiliary measures are adopted to ensure the safety of the falling process of the frame body, and the measures are often complicated, time and labor are wasted during operation, the cost for falling and falling prevention is high, and a high safety risk exists.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a method for automatically preventing an attached lifting scaffold from falling off in an accidental falling process, controlling the falling distance of a scaffold body, and being simple, convenient, safe and reliable in operation.

The purpose of the invention is realized by the following technical scheme:

a method for automatically preventing an attached lifting scaffold from falling comprises the steps that anti-falling devices are arranged between a building wall (9) and an attached lifting scaffold frame body (10) every other floor height, and at least 3 anti-falling devices are arranged in the whole building;

the anti-falling device comprises a horizontal central shaft (4), two ratchets (2) which are fixedly sleeved on the central shaft and have the same diameter and are provided with staggered ratchets, two rotating wheels (1) which are symmetrically and fixedly arranged on the outer sides of the ratchets and have the diameter larger than that of the ratchets, two anti-falling blocks (3) correspondingly arranged below the ratchets and two mounting seats (5) symmetrically arranged on the outer sides of the rotating wheels;

the both ends of center pin (4) are installed on mount pad (5), runner (1) include rim plate (1a) and equipartition in pinion rack (1b) of rim plate outer fringe, and pinion rack (1b) is along rim plate outer fringe to one side slope, and the incline direction of pinion rack is opposite with the ratchet incline direction of ratchet, and the external diameter of ratchet is the same with rim plate (1a) diameter of runner.

The anti-falling block (3) is an integral upper hook-shaped steel plate with two asymmetric sides, a mounting hole (3a) is formed in the middle of the steel plate main body, one side of the steel plate main body is provided with hook teeth (3b) which extend upwards and are folded inwards and can be contacted with ratchets of a ratchet wheel, the other side of the steel plate main body is provided with sharp teeth (3c) which can be inserted into tooth grooves among the ratchets, the area of the sharp teeth is larger than that of the hook teeth, the gravity center of the anti-falling block deviates to one side of the sharp teeth, the anti-falling block is mounted on a horizontal anti-falling shaft (6) through the;

the mounting seat (5) is a shell welded by steel plates, the lower part of the inner side of the mounting seat is provided with a circular arc-shaped groove (5a), and a pair of rollers (5b) with arc-shaped roller surfaces are symmetrically mounted on two sides of the upper and lower grooves in the mounting seat respectively;

attaching installation seats (5) of the anti-falling devices to a building wall through wall-penetrating screws (8), arranging the installation seats of the anti-falling devices at positions to be installed from top to bottom along vertical rods of a climbing frame guide rail (7), and inserting toothed plates (1b) of rotating wheels between crosspieces (7a) of the climbing frame guide rail; the grooves (5a) on the two sides of the mounting seat are respectively sleeved into the two vertical upright rods of the climbing frame guide rail from the two sides, and the arc-shaped roller surface of the roller (5b) is contacted with the vertical upright rods of the climbing frame guide rail to fix the vertical upright rods;

when the attached lifting scaffold frame body falls down due to sudden failure in the ascending or descending process, the climbing frame guide rail (7) falls down along with the frame body, the crosspiece (7a) of the climbing frame guide rail drives the rotating wheel to rotate in the falling process, the ratchet wheel is triggered to rotate simultaneously, the tooth tips of the falling prevention blocks are inserted into the tooth grooves of the ratchet wheel to be meshed with the ratchet wheel, the ratchet wheel is braked, the rotating wheel is braked simultaneously, the crosspiece of the climbing frame guide rail is prevented from continuously falling, and then the whole attached lifting scaffold frame body is prevented from falling.

The anti-falling device is skillfully arranged between a building wall and an attached lifting scaffold body by adopting an innovative design, an installation seat is attached to the building wall through a wall-penetrating screw rod, a toothed plate of a rotating wheel is inserted between crosspieces of a climbing frame guide rail of the scaffold body, the rotating wheel and a ratchet wheel of the anti-falling device are arranged on the same central shaft, and an anti-falling block is arranged below the ratchet wheel and can freely rotate along an anti-falling shaft. When the scaffold frame body accident falls, the tooth point of the falling prevention block is timely inserted into the tooth groove of the ratchet wheel to play a braking role, meanwhile, the toothed plate of the rotating wheel also blocks the crosspiece of the climbing frame guide rail, the combined action prevents the frame body from further falling, and construction safety is guaranteed.

The anti-falling device of the invention completely adopts mechanical braking, can play the role of automatic anti-falling in the ascending and descending processes of the scaffold body, and has good anti-falling effect. The anti-falling device is simple and reliable in structure, convenient to install and detach and high in universality, meets the requirements of relevant building construction specifications, effectively solves the anti-falling problem in the lifting process of the attached lifting scaffold body, and greatly improves the safety of building construction.

Drawings

FIG. 1 is a schematic view of the configuration of a fall arrest device used in the method of the present invention;

FIG. 2 is a partial cross-sectional top view of the fall arrest device taken along a central axis;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

FIG. 4 is a fall arrest schematic of the method of the present invention for installing the fall arrest device.

Detailed Description

The invention is further explained by the accompanying drawings.

A method for automatically preventing an attached lifting scaffold from falling is characterized in that anti-falling devices are arranged between a building wall (9) and an attached lifting scaffold frame body (10) at intervals of floor height, and at least 3 anti-falling devices are arranged in the whole building, as shown in figure 4.

The anti-falling device is shown in the figures 1, 2 and 3 and comprises a horizontal central shaft 4, two ratchets 2 which are fixedly sleeved on the central shaft and have the same diameter and are arranged in a staggered mode, two rotating wheels 1 which are symmetrically and fixedly arranged on the outer sides of the ratchets and have the diameter larger than that of the ratchets, two anti-falling blocks 3 correspondingly arranged below the ratchets and two mounting seats 5 symmetrically arranged on the outer sides of the rotating wheels.

The both ends of center pin 4 are installed on mount pad 5, runner 1 includes rim plate 1a and equipartition in the pinion rack 1b of rim plate outer fringe, and pinion rack 1b inclines to one side along the rim plate outer fringe, and the incline direction of pinion rack is opposite with the ratchet incline direction of ratchet, and the external diameter of ratchet is the same with the rim plate 1a diameter of runner.

The anti-falling block 3 is an integral upper hook-shaped steel plate with two asymmetric sides, a mounting hole 3a is formed in the middle of a steel plate main body, one side of the steel plate main body is provided with hook teeth 3b which extend backwards and are folded inwards and can be contacted with ratchets of a ratchet wheel, the other side of the steel plate main body is provided with sharp teeth 3c which can be inserted into tooth grooves between the ratchets, the area of the sharp teeth is larger than that of the hook teeth, the anti-falling block is an eccentric block with the gravity center deviated to one side of the sharp teeth, the tooth tops of the hook teeth 3b can be guaranteed to be collided with the ratchet wheel under the action of self weight to prevent swinging, and the tooth tips of the anti-falling block can be inserted into the ratchet wheel to be meshed with the ratchet wheel when the scaffold frame body stalls and falls down, so that the braking effect is achieved.

The anti-falling block 3 is arranged on a horizontal anti-falling shaft 6 through a mounting hole, and two ends of the anti-falling shaft are arranged at the lower part of the mounting seat 5. The mounting seat 5 is a shell formed by welding steel plates, the lower part of the inner side of the mounting seat is provided with a circular arc-shaped groove 5a for respectively sleeving two vertical rods of the climbing frame guide rail from two sides, two sides of the upper groove and the lower groove in the mounting seat are respectively and symmetrically provided with a pair of rollers 5b with arc-shaped roller surfaces, the arc-shaped roller surfaces of the rollers are in contact with the vertical rods of the climbing frame guide rail, the vertical rods are fixed, and friction when the climbing frame guide rail goes up and down is reduced.

As shown in fig. 3 and 4, the invention is installed between a building wall 9 and an attached lifting scaffold frame body 10, an installation base 5 of the invention is attached to the building wall through a wall-through screw 8, the installation base is arranged at a position to be installed from top to bottom along a vertical upright post 7 of a climbing frame guide rail, and a toothed plate 1b of a rotating wheel is inserted between crosspieces 7a of the climbing frame guide rail. In order to more clearly express the mounting structure and position of the rotating wheel 1, the ratchet wheel 2 and the anti-falling block 3, a crosspiece 7a of the climbing frame guide rail is schematically drawn in fig. 3. The anti-falling devices are arranged at intervals of the height of a floor, and at least 3 anti-falling devices are arranged.

In the work progress, when the inserted lift scaffold support body is ascending or descending in-process proruption trouble and is weighed down, the frame rail 7 that climbs of inserted lift scaffold support body is weighed down simultaneously along with the support body, climbs the crosspiece 7a of frame rail and drives the runner rotation promptly, triggers ratchet simultaneously and rotates. The falling speed is far higher than the rotating speed of the rotating wheel driven during normal lifting, so that the rotating speed of the ratchet wheel is higher, the tooth tips of the falling prevention blocks are inserted into tooth grooves of the ratchet wheel to be meshed with the ratchet wheel, the ratchet wheel is braked, the rotating wheel is also braked simultaneously, and the rail crosspiece of the climbing frame guide rail is prevented from continuously falling, so that the timely braking of the whole attached lifting scaffold body is realized.

The anti-falling device used in the method is provided with the ratchet wheels with the two staggered ratchets and the two anti-falling blocks, so that larger impact force generated when the scaffold falls can be buffered, double safety of ratchet wheel braking is realized, and the two runner toothed plates block the crosspiece of the climbing frame guide rail, so that the timeliness and reliability of preventing the scaffold from falling are further improved, and the construction safety is ensured. The pinion rack of runner is along rim plate outer fringe to a lopsidedness, during the installation, as shown in fig. 3, inserts the pinion rack of climbing between the frame guide rail crosspiece and is the skew state that makes progress, and when inserted lift scaffold support body and the frame guide rail that climbs lift, the crosspiece of climbing the frame guide rail upwards promotes the pinion rack, and the pinion rack can be in the same place to rotate, can not form to climbing the frame guide rail crosspiece and block. When the attached lifting scaffold frame body and the climbing frame guide rail accidentally fall down, the upwards inclined toothed plate blocks the crosspiece of the climbing frame guide rail to support the crosspiece, the inclination direction of the ratchet wheel is opposite to the inclination direction of the toothed plate, the tooth tip of the falling prevention block is inserted into the tooth groove of the ratchet wheel to upwards prop the ratchet wheel, and braking is achieved. The outer diameter of the ratchet wheel is generally not larger than the diameter of the wheel disc of the rotating wheel, so that the toothed plate of the rotating wheel is ensured to have enough length to be inserted between the crosspieces of the climbing frame guide rail, and the interference of the ratchet wheel to the movement of the climbing frame guide rail is avoided.

Claims

1. A method for automatically preventing an attached lifting scaffold from falling is characterized in that anti-falling devices are installed between a building wall (9) and an attached lifting scaffold frame body (10) at intervals of floor height, and at least 3 anti-falling devices are installed in the whole building;