Tower crane safety protection device

Abstract

The tower crane safety protection device comprises a fixed box, a top pulley is rotationally connected to the top of the inner side of the fixed box, a steering pulley is rotationally connected to the end, on the inner side of the fixed box, of the bottom end of the top pulley, and a bottom pulley is rotationally connected to the end, on the bottom of the inner side of the fixed box, of the bottom end of the steering pulley; a supporting plate is welded to the bottom end of the inner side of the fixing box, a clamping sliding groove is formed in one end of the supporting plate, and a clamping sliding block is embedded into the inner side of the clamping sliding groove in a sliding mode. The protection mechanism pushes the clamping sliding block after bearing large gravity, the steel wire rope is limited through the clamping sliding block and the driven clamping block, so that stopping of the protection mechanism is achieved, the protection mechanism can be triggered only when sudden gravity increase occurs, normal sliding cannot be affected, and compared with the prior art, the climbing device has the smoother and faster climbing speed.

Description

Technical Field

[0001] The present application relates to the technical field of building tower cranes, and in particular to a safety protection device for tower cranes. Background Art

[0002] Tower crane is the most commonly used lifting equipment on construction sites. It is also known as "tower crane". It is connected section by section and is used to lift raw materials for construction such as steel bars, wooden slats, concrete, steel pipes, etc. Tower crane is an indispensable equipment on construction sites.

[0003] Compared with the actual use process, the existing tower crane safety protection devices currently require the operator to alternately loosen and then buckle the safety buckle on the climbing mechanism of the tower crane during climbing to provide safety protection for the operator during the climbing process. This protection mechanism is very cumbersome, making the already cumbersome climbing process even more cumbersome, seriously consuming the operator's physical strength, and also reducing the overall operating efficiency.

[0004] Therefore, in order to solve the above problems, the present application provides a tower crane safety protection device.

[0005] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0006] In order to solve the problem that the climbing process is relatively complicated, the present application provides a tower crane safety protection device.

[0007] The present application provides a tower crane safety protection device, comprising a fixed box, wherein the top of the inner side of the fixed box is rotatably connected to a top pulley, the bottom end of the top pulley is rotatably connected to a steering pulley at one end of the inner side of the fixed box, and the bottom end of the steering pulley is rotatably connected to a bottom pulley at one end of the inner side of the fixed box;

[0008] A support plate is welded on the bottom inner end of the fixed box, and a clamping groove is opened at one end of the support plate, and a clamping slider is slidably embedded in the inner side of the clamping groove, and a docking plate is welded on one side of the top end of the support plate, and three return springs are connected to the outer surface of one end of the docking plate, and a push rod is rotatably connected to one side of the top end of the clamping slider. Two vertical slide rails are welded on both sides of the top end of the support plate, and slide rods are slidably embedded in the inner sides of the four vertical slide rails, and a connecting fixed frame is welded in the middle of several of the slide rods, and two downward pressure pulleys are rotatably connected in the middle of the connecting fixed frame, and a driven clamping block is welded on one end of the inner side of the fixed box.

[0009] Preferably, the top end of the clamping slot extends through and to the outside of the support plate, and the top end of the clamping slider extends to the outside of the clamping slot.

[0010] Preferably, one end of a plurality of the return springs is connected to the outer side of one end of the clamping slider, and one end of the clamping slider corresponds to the outer side of one end of the driven clamping block.

[0011] Preferably, the top end of the push rod is rotatably connected to the middle of the bottom end of the connecting and fixing frame.

[0012] Preferably, a steel wire rope is wound around the outside of the top pulley, the steering pulley, the bottom pulley and the two downward pressure pulleys, and the top and bottom ends of the steel wire rope extend through and extend to the outside of the fixing box.

[0013] Preferably, an assembly baffle is fixed to the outer side of one end of the fixing box by bolts, a hook frame is welded to the outer side of one end of the fixing box, and a closing plate is fixed to the top end of the hook frame by bolts.

[0014] Preferably, the elastic force of the plurality of return springs is greater than the gravity of the fixed box.

[0015] In summary, this application includes the following beneficial technical effects:

[0016] 1. By setting the snap-on hook as a standard weight limit protection mechanism and changing the direction of the wire rope through the pulley group, the protection mechanism pushes the clamping slider after being subjected to a large gravity, and limits the wire rope together with the driven clamping block, thereby stopping the protection mechanism. Since it can only be triggered when there is a sudden increase in gravity, it will not affect normal sliding. Compared with the existing technology, it has a smoother and faster climbing speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the installation structure of the fixing box in the first embodiment of the present application;

[0018] Figure 2 It is a schematic diagram of the top pulley installation structure in Example 1 of the present application;

[0019] Figure 3 It is a schematic diagram of the reset spring installation structure in Example 1 of the present application.

[0020] Explanation of the reference numerals in the accompanying drawings: 1. fixing box; 2. top pulley; 3. steering pulley; 4. bottom pulley; 5. support plate; 6. clamping slide groove; 7. clamping slider; 8. docking plate; 9. return spring; 10. push rod; 11. vertical slide rail; 12. slide rod; 13. connecting fixed frame; 14. pressing pulley; 15. driven clamping block; 16. wire rope; 17. assembly baffle; 18. hook frame; 19. closing plate. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-Figure 3 This application is described in further detail.

[0022] Embodiment 1

[0023] Reference Figure 1-Figure 3 The top of the clamping slide 6 extends through and extends to the outside of the support plate 5, and the top of the clamping slide 7 extends to the outside of the clamping slide 6. A docking plate 8 is welded on one side of the top of the support plate 5, and three return springs 9 are connected to the outer surface of one end of the docking plate 8. In order to enable the clamping and fixing mechanism to automatically reset after use, the elastic force of the return springs 9 is greater than the gravity of the fixed box 1. In order to prevent the operator from climbing down, the fixed box 1 triggers the clamping limit mechanism by its own weight, and the top side of the clamping slide 7 rotates A push rod 10 is connected, two vertical slide rails 11 are welded on both sides of the top of the support plate 5, and slide rods 12 are slidably embedded in the inner sides of the four vertical slide rails 11. A connecting and fixing frame 13 is welded in the middle of the slide rods 12. The top of the push rod 10 is rotatably connected to the middle of the bottom of the connecting and fixing frame 13. The connecting and fixing frame 13 is rotatably connected to two downward pressure pulleys 14. A driven clamping block 15 is welded at one end of the inner side of the fixed box 1. In order to realize the clamping and fixing function, one end of the plurality of return springs 9 is connected to the clamping slider 7. The outer sides of the ends are connected, one end of the clamping slider 7 corresponds to the outer side of one end of the driven clamping block 15, and a steel wire rope 16 is wound around the outer sides of the top pulley 2, the steering pulley 3, the bottom pulley 4 and the two downward pressure pulleys 14. The top and bottom ends of the steel wire rope 16 extend through the outside of the fixed box 1, and an assembly baffle 17 is fixed to the outer side of one end of the fixed box 1 by bolts. A hook frame 18 is welded to the outer side of one end of the fixed box 1, and a closing plate 19 is fixed to the top of the hook frame 18 by bolts, in order to achieve outward docking with the safety rope.

[0024] Working principle: First, the operator needs to fix the top of the wire rope 16 to the top of the tower crane, and fix the bottom of the wire rope 16 to the bottom of the tower crane, then unscrew the bolts on the top of the hook frame 18 used to fix the closing plate 19, and then hang the hook of the safety rope bound to the operator inside the hook frame 18, and then reset the closing plate 19 and tighten the bolts. Then the operator climbs up, during which the safety rope will pull the hook frame 18 to slide upward, and the hook frame 18 will drive the fixed box 1 welded thereto to slide upward, during which the fixed box 1 will slide upward along the wire rope 16 through the top pulley 2, the steering pulley 3, the bottom pulley 4 and the two downward pressure pulleys 14 connected to the internal rotation;

[0025] During the climbing process, if the operator loses his hands and falls, the safety rope will immediately change from pulling upward to pulling the hook frame 18 downward, and at the same time, the weight of the human body will be all added to the outside of the fixed box 1, pulling the fixed box 1 to slide downward. During this period, the steering pulley 3 will change the straight up and down state of the wire rope 16, so that the wire rope 16 wound around one end of the outer side of the steering pulley 3 presses the steering pulley 3 downward. At the same time, the bottom pulley 4 also changes the direction of the wire rope 16 so that the wire rope 16 presses the two pressing pulleys 14 downward during transmission. When the pressure received by the two pressing pulleys 14 is greater than the elastic force of the three return springs 9, the two pressing pulleys 14 will drive the connecting fixing frame 13 provided with a fixation to slide downward, and the connecting fixing frame 13 will slide downward under the guidance of the four vertical slide rails 11 through the four slide bars 12 welded at the two ends of the outer side, and at the same time press down the push rod 10 connected to the rotation at its bottom end;

[0026] After being under pressure, the push rod 10 will rotate the connected clamping slide block 7 by pressing its bottom end downward, thereby pushing the clamping slide block 7 to slide inside the clamping slide groove 6 opened in the support plate 5, until the clamping slide block 7 and the driven clamping block 15 clamp and fix the wire rope 16. At that time, the operator will also stop falling, and then the operator adjusts the position and grabs the climbing mechanism again to make its own weight leave the fixing box 1. At that time, since the elastic force of the three return springs 9 is greater than the overall weight of the fixing box 1 together with the internal structure thereof, the return spring 9 will push the clamping slide block 7 to reset. During this period, the clamping slide block 7 will push the push rod 10 to reset. At the same time, the push rod 10 will push the connecting fixing frame 13 to reset. The connecting fixing frame 13 will drive the two downward pressure pulleys 14 to reset, thereby realizing the reset of the entire safety protection mechanism. Such a design can make the protection device not affect the climbing process, can greatly save the operator's physical strength, and reduce the risk of falling.

[0027] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tower crane safety protection device, comprising a fixing box (1), characterized in that: The top of the inner side of the fixed box (1) is rotatably connected to a top pulley (2), the bottom end of the top pulley (2) is rotatably connected to a steering pulley (3) at one end of the inner side of the fixed box (1), and the bottom end of the steering pulley (3) is rotatably connected to a bottom pulley (4) at one end of the bottom of the inner side of the fixed box (1); A support plate (5) is welded to the bottom inner end of the fixed box (1), a clamping groove (6) is provided at one end of the support plate (5), a clamping slider (7) is slidably embedded in the inner side of the clamping groove (6), a docking plate (8) is welded to one side of the top end of the support plate (5), three return springs (9) are connected to the outer surface of one end of the docking plate (8), a push rod (10) is rotatably connected to one side of the top end of the clamping slider (7), two vertical slide rails (11) are welded to both sides of the top end of the support plate (5), a slide rod (12) is slidably embedded in the inner side of the four vertical slide rails (11), a connecting fixed frame (13) is welded in the middle of a plurality of the slide rods (12), two downward pressure pulleys (14) are rotatably connected in the middle of the connecting fixed frame (13), and a driven clamping block (15) is welded to one end of the inner side of the fixed box (1).

2. A tower crane safety protection device according to claim 1, characterized in that: The top end of the clamping slide groove (6) extends through and to the outside of the support plate (5), and the top end of the clamping slider (7) extends to the outside of the clamping slide groove (6).

3. A tower crane safety protection device according to claim 1, characterized in that: One end of the plurality of return springs (9) is connected to the outer side of one end of the clamping slider (7), and one end of the clamping slider (7) corresponds to the outer side of one end of the driven clamping block (15).

4. A tower crane safety protection device according to claim 1, characterized in that: The top end of the push rod (10) is rotatably connected to the middle of the bottom end of the connecting and fixing frame (13).

5. A tower crane safety protection device according to claim 1, characterized in that: A steel wire rope (16) is wound around the outside of the top pulley (2), the steering pulley (3), the bottom pulley (4) and the two downward pressure pulleys (14), and the top and bottom ends of the steel wire rope (16) extend through the outside of the fixed box (1).

6. A tower crane safety protection device according to claim 1, characterized in that: An assembly baffle (17) is fixed to the outside of one end of the fixing box (1) by means of bolts, a hook frame (18) is welded to the outside of one end of the fixing box (1), and a closing plate (19) is fixed to the top of the hook frame (18) by means of bolts.

7. A tower crane safety protection device according to claim 1, characterized in that: The elastic force of the plurality of return springs (9) is greater than the gravity of the fixed box (1).

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