CN215978372U - Chain type automatic falling protector attached to lifting scaffold - Google Patents

Abstract

A chain type automatic falling protector attached to a lifting scaffold is applied to the effect that the attached lifting scaffold plays a role in automatically preventing falling in the lifting operation. It is composed of fixed pulley, anti-drop chain and chain type automatic anti-drop device. The fixed pulley of the anti-falling device plays a role in bearing force and enabling the anti-falling chain to pass through smoothly, the anti-falling chain plays a role in lifting the frame body when the frame body falls, and the automatic anti-falling device plays a role in locking the anti-falling chain. The automatic falling protector is simple and convenient to operate, is not easy to break down, and has short braking distance which is 50-70% shorter than the braking distance of the automatic falling protector used in the market. Even if the fault occurs, the fault can be easily eliminated. The safety guarantee of the lifting operation of the attached lifting scaffold is greatly improved.

Description

Chain type automatic falling protector attached to lifting scaffold

The technical field is as follows:

the utility model relates to a chain type automatic falling protector of an attached lifting scaffold.

Background art:

at present, each elevator position of an attached lifting scaffold used in the building market is provided with an automatic falling protector. Most of the existing automatic falling protectors attached to lifting scaffolds are pendulum type automatic falling protectors or pull rod type automatic falling protectors. The automatic falling protector is easy to break down in the application process, the normal lifting operation of the frame body is influenced when the falling protector breaks down, and the falling protector is not easy to remove when the falling protector breaks down. Therefore, in order to ensure the normal lifting operation of the frame body, a worker controls the automatic falling protector to prevent the automatic falling protector from working or being detached. The automatic fall arrester does not work or is dismantled, and the safety risk is greatly increased. Most of the falling of the climbing frame is caused by that the automatic falling protector does not work or is dismantled without the automatic falling prevention function.

The utility model content is as follows:

most of the automatic falling protectors attached to lifting scaffolds used in the building market are pendulum type automatic falling protectors and pull rod type falling protectors. The pendulum automatic falling protector is arranged on each wall-attached support and realizes automatic falling prevention by the action between a ladder stop on a frame body guide rail and a pendulum pin of a pendulum; the pull rod type falling protector realizes automatic falling prevention by utilizing the functions of inclined plane locking and long pull rods fixed on a wall body. These automatic fall arrest devices all suffer from the following problems: the braking distance is generally about 100mm, the automatic falling protector easily breaks down in the lifting operation process of the frame body, the normal lifting operation of the frame body is influenced when the automatic falling protector breaks down, the fault is not easy to remove, so that an operator can control the automatic falling protector to prevent the automatic falling protector from working or removing the automatic falling protector, and the safety risk is increased when the automatic falling protector does not work or is removed. The falling of the climbing frame is usually caused by the fact that the automatic falling protector does not work or is detached. In order to solve the problems, the utility model discloses a chain type automatic falling protector.

The technical scheme adopted by the utility model is as follows:

the chain type automatic falling protector consists of a fixed pulley, a falling prevention chain and an automatic falling protector. The fixed pulley, the anti-falling chain and the automatic anti-falling device are mutually independent and separated. When the anti-falling chain is used, the anti-falling chain penetrates through the fixed pulley, one end of the anti-falling chain is fixed on a connecting lug plate of a rear baffle plate of the automatic anti-falling device through a bolt, and the other end of the anti-falling chain penetrates through a chain wheel in the automatic anti-falling device and then hangs down for 1.5 meters. Two ends of two chain wheels in the automatic falling protector are provided with shafts, one end is a short shaft, and the other end is a longer spline shaft. Short shafts of the two chain wheels respectively penetrate through two holes of a rear baffle of the automatic falling protector, and one end of a spline shaft of each chain wheel respectively penetrates through two holes of a front baffle of the automatic falling protector. The automatic falling protector comprises a front baffle plate, a gear clamp, a positioning bolt, a gear clamp and a connecting rod, wherein the gear clamp is arranged between the two spline gears, the gear clamp is used for controlling the spline gears to rotate, the gear clamp is provided with a strip-shaped hole in the center, and the positioning bolt is arranged in the strip-shaped hole. The upper end of the gear clamp is connected with the buffer spring, the upper end of the buffer spring is connected with the intersection of the pull rod and the support rod, and the pull rod is connected with the electric hoist hook of the lifting frame body. When the support body normally goes up and down, the gear clamp leaves the two spline gears under the action of the electric hoist, and the spline gears can normally rotate. A tension spring is hung to gear checkpost lower extreme, and when the support body goes up and down to move, the power chain of electric block splits in the twinkling of an eye, and the support body just freely falls, and at this moment gear checkpost upper end just loses control power, and gear checkpost lower extreme blocks spline gear in the twinkling of an eye under tension spring's effect. The spline gear is clamped and can not rotate, the chain wheel can not rotate, and the anti-falling chain is clamped, so that the automatic anti-falling function is realized.

The beneficial effects of the technology of the utility model are:

the chain type automatic falling protector has various automatic falling preventing effects of the existing attached lifting scaffold, and is much more sensitive than the existing automatic falling protector used in the market, and the braking distance is short by 50-70%. The operation is simple and convenient, the fault is not easy to occur, and the fault is easy to remove even if the fault occurs. Therefore, the safety guarantee of the lifting operation of the frame body is greatly improved.

Drawings

The technology of the present invention will be further explained with reference to the drawings and examples

FIG. 1 is a structural diagram of a stressed support, a fixed pulley and an anti-falling chain

In the figure, 1 is a stress support, 2 is a fixed pulley, and 3 is an anti-falling chain.

FIG. 2 is a structural diagram of an automatic falling protector

In the figure, 4 pull rods, 5 support rods, 6 buffer springs, 7 gear clamps, 8 limiting bolts, 9 automatic falling protector rear baffles, 10 chain wheels, 11 spline shafts on the chain wheels, 12 spline gears, 13 automatic falling protector front baffles, 14 tension springs, 15 fixed front baffle base lug plates and 16 base reinforcing plates.

FIG. 3 is a combined diagram of a fixed pulley, a fall-preventing chain and an automatic fall-preventing device in the implementation process

In the figure, 1 a stress support, 2 a fixed pulley, 3 an anti-falling chain, 17 an automatic anti-falling device and 18 an electric hoist

The specific implementation mode is as follows:

in the figure (1), a fixed pulley 2 is fixed on a stressed support 1, an anti-falling chain 3 passes through the fixed pulley 2,

in the figure (2), one end of the anti-falling chain 3 passes through the fixed pulley 2 and is fixed on a connecting lug plate of a rear baffle plate 9 of the automatic anti-falling device 17 by bolts. The other end of the anti-falling chain 3 passes through the two chain wheels 10 in the automatic anti-falling device 17 and then hangs down for 1.5 meters. Short shafts on two chain wheels 10 in the automatic falling protector 17 respectively penetrate through two holes of a rear baffle 9 of the automatic falling protector 17, and spline shafts 11 on the two chain wheels 10 respectively penetrate through two holes of a front baffle 13 of the automatic falling protector 17. Spline shafts 11 of outer baffles 13 of the automatic falling protector 17 are respectively provided with spline gears 12, the centers of the two spline gears 12 are provided with a gear clip 7, a limiting bolt 8 is arranged in a strip-shaped hole on the gear clip 7, and the gear clip 7 controls the spline gears to rotate. The upper end of the gear clip 7 is connected with the buffer spring 6, and the upper end of the buffer spring 6 is connected with the intersection of the pull rod 4 and the stay bar 5. The distance that the gear catch 7 moves is controlled by the limit bolt 8. The gear clip 7 moves upwards to leave the two spline gears 12, the two spline gears 12 can rotate freely, the spline gears 12 rotate freely, the chain wheel 10 can also rotate freely, and the anti-falling chain 3 can pass through the automatic anti-falling device 17 freely. A tension spring 14 is arranged at the lower end of the gear clip 7.

In the figure 3, when the power chain of the electric hoist attached to the lifting scaffold is broken, the attached lifting scaffold freely falls, at the moment, the pull rod 4 loses upward pulling force, the upper end of the gear clip 7 also loses pulling force, the lower end of the gear clip is under the action of the pulling force of the spring 14 to instantly clamp the spline gear 12, at the moment, the spline gear 12 cannot rotate, the chain wheel 10 cannot rotate, and the anti-falling chain 3 is clamped, so that the anti-falling effect is achieved.

Claims (1)

1. The utility model provides an automatic safety hook of chain formula of adhering to lifting scaffolding, it includes the fixed pulley, prevents weighing down chain, automatic safety hook, characterized by: the fixed pulley (2) is fixed on the stressed support (1), the automatic falling protector (17) is fixed at the bottom of the attached lifting scaffold, when in use, one end of the falling prevention chain (3) passes through the fixed pulley (2) and is fixed on a connecting lug plate of a rear baffle plate (9) of the automatic falling protector (17) through a bolt, the other end of the falling prevention chain (3) passes through a chain wheel (10) in the automatic falling protector (17) and then hangs down for 1.5 meters, short shafts on two chain wheels (10) in the automatic falling protector (17) respectively pass through two holes of the rear baffle plate (9) of the automatic falling protector (17), spline shafts (11) on the two chain wheels (10) respectively pass through two holes of a front baffle plate (13) of the automatic falling protector (17), spline gears (12) are respectively arranged on the two spline shafts (11) of the front baffle plate (13) of the automatic falling protector (17), a gear clip (7) is arranged between the two spline gears (12), gear checkpost (7) are control spline gear (12) pivoted, and gear checkpost (7) upper end is connected with buffer spring (6), and buffer spring (6) upper end is connected with the junction of pull rod (4) and vaulting pole (5), and the distance of moving on gear checkpost (7) is controlled by spacing bolt (8), and tension spring (14) are installed to gear checkpost (7) lower extreme.

Images