CN220317210U

CN220317210U - Tower crane sleeve frame anti-falling device

Info

Publication number: CN220317210U
Application number: CN202321826045.5U
Authority: CN
Inventors: 李楠楠; 周海涛; 孟庆琳
Original assignee: Dahan Technology Co ltd; Shandong Fuyou Technology Co ltd; Shandong Jianzhu University
Current assignee: Dahan Technology Co ltd; Shandong Fuyou Technology Co ltd; Shandong Jianzhu University
Priority date: 2023-07-12
Filing date: 2023-07-12
Publication date: 2024-01-09
Anticipated expiration: 2033-07-12

Abstract

A falling-preventing device for a tower crane sleeve frame relates to the technical field of tower cranes and is used for solving the problem that the sleeve frame is easy to fall when a tower crane is installed and detached. The anti-falling device comprises a sleeve frame connecting lug plate, a lower turntable connecting lug plate, an anti-falling pin and an anti-falling hook, wherein the sleeve frame connecting lug plate is fixed at the top of a tower crane sleeve frame, the anti-falling hook is hinged with the sleeve frame connecting lug plate, the anti-falling hook is provided with a balance structure, and the anti-falling hook is kept in a vertical state under the action of the balance structure; the upper part of the anti-falling hook is provided with a hook groove which is downwards arranged, the sleeve frame moves upwards to be close to the lower rotary table, the anti-falling hook is forced to rotate around the hinge point of the anti-falling hook after touching the anti-falling pin on the lower rotary table connecting lug plate, and the hook groove is hung on the anti-falling pin after the anti-falling hook is reset. When the sleeve frame is in installation, the falling-preventing hook hooks the falling-preventing pin when the sleeve frame falls due to the fact that the connecting main pin between the sleeve frame connecting lug plate and the lower rotary table connecting lug plate cannot penetrate, and further the sleeve frame is prevented from continuously falling, and safety accidents are avoided.

Description

Tower crane sleeve frame anti-falling device

Technical Field

The utility model relates to the technical field of tower cranes, in particular to a falling prevention device for a tower crane sleeve frame.

Background

The tower crane (tower crane for short) is applied to lifting and carrying materials in engineering construction, and once the tower crane has accidents, the tower crane not only can cause property loss, but also can cause threat to personal safety. In the accident of the tower crane, the accident caused by the installation and the disassembly of the tower crane is a large proportion. The connecting pin shafts of the turntable and the sleeve frame are not installed in the mounting and dismounting operation, so that the sleeve frame falls due to difficult alignment of the ear plates of the sleeve frame and the ear plates of the lower turntable, difficult penetration of the pin shafts and the like, and the main reasons of the mounting and dismounting accidents are caused.

Disclosure of Invention

The utility model aims to provide a falling-preventing device for a tower crane sleeve frame, which is used for solving the problem that the sleeve frame is easy to fall when the sleeve frame is installed and detached.

The technical scheme adopted for solving the technical problems is as follows: the falling prevention device for the tower crane sleeve frame comprises a sleeve frame connecting lug plate, a lower turntable connecting lug plate, a falling prevention pin and a falling prevention hook, wherein the sleeve frame connecting lug plate is fixed at the top of the tower crane sleeve frame, the falling prevention hook is hinged with the sleeve frame connecting lug plate, the falling prevention hook is provided with a balance structure, and the falling prevention hook is kept in a vertical state under the action of the balance structure; the upper portion of the anti-falling hook is provided with a hook groove which is arranged downwards, the sleeve frame moves upwards to be close to the lower turntable, the anti-falling hook is forced to rotate around a hinge point of the anti-falling hook after touching an anti-falling pin on a lower turntable connecting lug plate on the lower turntable, and the hook groove is hung on the anti-falling pin until the anti-falling hook is reset.

Further, the sleeve frame connecting lug plate is provided with two groups of first mounting holes, the anti-falling hook is provided with a group of second mounting holes, and a group of mounting pins penetrate through the first mounting holes and the second mounting holes to realize the hinge connection of the anti-falling hook and the sleeve frame connecting lug plate.

Further, the balance structure is a weight part arranged at the lower part of the anti-falling hook, the hook groove on the anti-falling hook and the weight part are arranged left and right relative to the second mounting hole, and the weight part is positioned at the lowest point in a natural state so that the anti-falling hook is in a vertical state.

Further, the upper part of the anti-falling hook is provided with a guide surface, and when the anti-falling hook moves upwards, the anti-falling pin is contacted with the guide surface to extrude and drive the anti-falling hook to rotate.

Further, the guide surface is an inclined surface or an arc surface.

Further, the lower turntable connecting lug plate is provided with two groups of anti-falling pin holes, and the anti-falling pins are arranged in one group of anti-falling pin holes.

Further, the balance structure is a pre-tightening piece, and the pre-tightening piece is arranged between the anti-falling hook and the sleeve frame connecting lug plate.

Further, the pretension piece is a torsion spring or a coil spring.

The beneficial effects of the utility model are as follows: when the sleeve frame falls due to the fact that the connecting main pin between the sleeve frame connecting lug plate and the lower turntable connecting lug plate does not penetrate, the falling prevention hook hooks the falling prevention pin, so that the sleeve frame is prevented from continuously falling, and safety accidents are avoided; the utility model has simple structure, convenient installation and disassembly and low cost.

Drawings

FIG. 1 is a three-dimensional view of a lower turret of a tower crane in the prior art;

FIG. 2 is a three-dimensional assembly view of the main leg of the brace and the brace attachment ear plate of the present utility model;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a three-dimensional view of the fall arrest hook of the present utility model;

FIG. 5 is an assembly view of the holster attachment lug and the fall arrest hook;

FIG. 6 is a schematic view of the fall arrest hook being hooked on the fall arrest pin as the holster is moved up;

FIG. 7 is a schematic view of an arc-shaped guide surface provided on the fall arrest hook;

FIG. 8 is a schematic illustration of the placement of a pretensioning member between a fall arrest hook and a holster attachment lug;

in the figure: the novel anti-falling device comprises a sleeve frame 1, an ear plate 11, a first mounting hole 2, an anti-falling hook 21, a counterweight part 22, a second mounting hole 23, a guide surface 24, a hook groove 3, an anti-falling pin hole 4, an anti-falling pin 5, a mounting pin 6, a sleeve frame 7, a lower turntable connecting ear plate 8, a lower turntable and a pre-tightening piece 9.

Detailed Description

As shown in fig. 1, in the structure of a lower turntable 8 of a tower crane in the prior art, four groups of lower turntable connecting lug plates 7 are uniformly distributed on the side wall of the lower end of the lower turntable 8, and unlike the prior art, two groups of anti-falling pin holes 3 are formed in the lower turntable connecting lug plates 7, the anti-falling pin holes 3 are round holes, and anti-falling pins 4 are arranged in one group of anti-falling pin holes 3.

As shown in fig. 2 to 6, the present utility model includes a hanger attachment lug plate 1, a lower turntable attachment lug plate 7, a fall preventing pin 4, and a fall preventing hook 2, and is described in detail with reference to the accompanying drawings.

As shown in fig. 2 to 6, a falling prevention device for a tower crane set frame comprises a set frame connecting lug plate 1 and a falling prevention hook 2, wherein the set frame connecting lug plate 1 is fixed at the top of a tower crane set frame 6, and the falling prevention hook 2 is hinged with the set frame connecting lug plate 1 through a mounting pin 5. The method comprises the following steps: the sleeve frame connecting lug plate 1 is provided with two groups of first mounting holes 11, as shown in fig. 4, the anti-falling hook 2 is provided with a group of second mounting holes 22, and the mounting pin 5 passes through one group of the first mounting holes 11 and the second mounting holes 22 to realize the hinge connection of the anti-falling hook 2 and the sleeve frame connecting lug plate 1.

As shown in fig. 4, the anti-falling hook 2 is provided with a balance structure, and the anti-falling hook 2 is kept in a vertical state under the action of the balance structure. As shown in fig. 4 and 5, the balance structure is a weight portion 21 provided at the lower portion of the fall preventing hook 2, the upper portion of the fall preventing hook 2 is disposed to the left with respect to the whole fall preventing hook 2, and the weight portion 21 is disposed to the right with respect to the whole fall preventing hook 2, that is, the upper portion of the fall preventing hook 2 (the portion provided with the hook groove 24) and the weight portion 21 are disposed to the left and right with respect to the mounting pin 5 (or the second mounting hole 22). Under the action of the weight 21, the entire falling hook 2 is kept in a vertical state.

As shown in fig. 8, the balancing structure may also be a pre-tightening member 9, and the pre-tightening member 9 is disposed between the fall protection hook 2 and the hanger attachment lug plate 1. The pretension piece 9 can be a torsion spring or a coil spring, when the pretension piece 9 is a torsion spring, one end of the pretension piece 9 is fixedly connected with the anti-falling hook 2, the other end of the pretension piece 9 is fixedly connected with the sleeve frame connecting lug plate 1, and the pretension piece 9 is sleeved on the mounting pin 5.

As shown in fig. 4, the upper portion of the anti-falling hook 2 is provided with a hook groove 24 which is arranged downwards, in the process that the sleeve frame 6 moves upwards to approach the lower rotary table 8, as shown in fig. 6, after the anti-falling hook 2 touches the anti-falling pin 4 on the lower rotary table connecting lug plate 7 of the lower rotary table 8, the anti-falling hook 2 is forced to rotate around the hinge point (the mounting pin 5) until the anti-falling pin 4 is separated from the anti-falling hook 2, the anti-falling hook 2 is reset, at the moment, the hook groove 24 is contacted with the anti-falling pin 4, the anti-falling hook 2 is hung on the anti-falling pin 4, and further the anti-falling effect is achieved, and further falling of the sleeve frame 6 is avoided.

In order to facilitate the rotation of the anti-falling hook 2 driven by the anti-falling pin 4, as shown in fig. 4, the upper part of the anti-falling hook 2 is provided with a guide surface 23, and when the anti-falling hook 2 moves upwards, the anti-falling pin 4 contacts with the guide surface 23 to squeeze and drive the anti-falling hook 2 to swing. As shown in fig. 4, the guide surface 23 is a slope. As shown in fig. 7, the guide surface 23 may be an arc surface.

When the sleeve frame falls due to the fact that the connecting main pin between the sleeve frame connecting lug plate and the lower turntable connecting lug plate does not penetrate, the falling prevention hook hooks the falling prevention pin, so that the sleeve frame is prevented from continuously falling, and safety accidents are avoided; the utility model has simple structure, convenient installation and disassembly and low cost.

Claims

1. The falling prevention device for the tower crane sleeve frame is characterized by comprising a sleeve frame connecting lug plate, a lower turntable connecting lug plate, a falling prevention pin and a falling prevention hook, wherein the sleeve frame connecting lug plate is fixed at the top of the tower crane sleeve frame, the falling prevention hook is hinged with the sleeve frame connecting lug plate, a balance structure is arranged on the falling prevention hook, and the falling prevention hook is kept in a vertical state under the action of the balance structure; the upper portion of the anti-falling hook is provided with a hook groove which is arranged downwards, the sleeve frame moves upwards to be close to the lower rotary table of the tower crane, the anti-falling hook is forced to rotate around the hinge point of the anti-falling hook after touching the anti-falling pin on the lower rotary table connecting lug plate on the lower rotary table, and the hook groove is hung on the anti-falling pin until the anti-falling hook is reset.

2. The tower crane set anti-falling device according to claim 1, wherein the set connecting lug plate is provided with two groups of first mounting holes, the anti-falling hook is provided with a group of second mounting holes, and a group of mounting pins penetrate between the first mounting holes and the second mounting holes to realize the hinged connection of the anti-falling hook and the set connecting lug plate.

3. The tower crane set anti-falling device according to claim 1, wherein the balance structure is a weight part arranged at the lower part of the anti-falling hook, the hook groove and the weight part on the anti-falling hook are arranged left and right relative to the second mounting hole, and the weight part is positioned at the lowest point in a natural state so that the anti-falling hook is in a vertical state.

4. The tower crane set anti-falling device according to claim 1, wherein the upper part of the anti-falling hook is provided with a guide surface, and the anti-falling pin is contacted and extruded with the guide surface to drive the anti-falling hook to rotate when the anti-falling hook moves upwards.

5. The tower crane housing fall protection device of claim 4, wherein the guide surface is an inclined surface or an arc surface.

6. The tower crane set fall protection device of claim 1, wherein the lower turntable connecting lug plate is provided with two sets of fall protection pin holes, and the fall protection pins are arranged in one set of fall protection pin holes.

7. The tower crane hanger fall protection device of claim 1, wherein the balance structure is a pretension member disposed between the fall protection hook and the hanger attachment tab.

8. The tower crane housing fall protection device of claim 7, wherein the pretensioning member is a torsion spring or a coil spring.