Falling protector applied to vertical ladder type tower crane

Abstract

The utility model provides a falling protector applied to a vertical ladder type tower crane, which comprises a shell (1) fixedly mounted on a vertical ladder of the tower crane, the shell (1) is a hollow box body with an upper opening and a lower opening, a bottom shell (2) is mounted at the lower opening, and a wire hole (4) is formed in the bottom shell (2); a supporting shaft (5) is arranged on the side wall in the shell (1) in the vertical direction in a sliding mode, the supporting shaft (5) penetrates through an anti-falling device (6), and the bottom of the anti-falling device (6) is elastically connected with the bottom shell (2). The anti-falling device (6) is fixedly connected with one end of a safety rope (17), and the other end of the safety rope (17) penetrates out of the shell (1) through the line hole (4) and is connected with an anti-falling person. The tower crane vertical ladder is exquisite in design and stable in connection, the structural characteristics of the tower crane vertical ladder are fully considered, the structure is compact and efficient, and the casualty risk in high-altitude operation is remarkably reduced.

Description

Technical Field

[0001] The utility model relates to a falling arrester for a crane, in particular to a falling arrester applied to a straight-ladder tower crane. Background Art

[0002] The information provided in this part is only background information related to the present disclosure, and it is not necessarily prior art.

[0003] With the rapid development of the modern construction industry, tower cranes (referred to as tower machines for short) are important equipment indispensable in high-rise building construction, and their safety and stability have attracted more and more attention in the industry. As a common type of tower crane, the straight-ladder tower crane plays a key role in lifting materials, equipment, etc. However, during the actual operation process, due to the tall tower height and complex and changeable working environment, the safety of operators faces many challenges, especially the risk of falling from a height is particularly prominent.

[0004] Existing tower crane safety protection devices, such as load moment limiters, moment limiters, amplitude and height limiters, etc., although they can improve the operation safety of tower cranes to a certain extent, there are still certain limitations for the fall protection of straight-ladder tower crane operators during the climbing process.

[0005] It should be noted that the information disclosed in the above background art section is only used to strengthen the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0006] Object of the Invention: The technical problem to be solved by the utility model is to provide a falling arrester applied to a straight-ladder tower crane in view of the deficiencies of the prior art.

[0007] To solve the above technical problem, the utility model discloses a falling arrester applied to a straight-ladder tower crane, including:

[0008] A housing fixedly installed on the straight ladder of the tower crane, the housing is a hollow box body with openings at both the upper and lower ends, a bottom shell is installed at the lower opening, and a wire hole is provided on the bottom shell;

[0009] A support shaft is slidably arranged vertically on the inner side wall of the housing, the support shaft passes through the falling arrester device, and the bottom of the falling arrester device is elastically connected to the bottom shell;

[0010] One end of the safety rope is fixedly connected to the falling arrester device, and the other end of the safety rope passes through the wire hole out of the housing and is connected to the person to be protected from falling.

[0011] Further, the falling arrester device includes:

[0012] A support block elastically connected to the bottom shell, with both sides of the lower part of the support block movably connected to the bottoms of two driven blocks respectively;

[0013] The tops of the two driven blocks are elastically connected, and the middle part is a concave semi-circular structure;

[0014] A ratchet is provided in the two concave semi-circular structures, and the ratchet is sleeved on the support shaft;

[0015] A reel is also sleeved on the support shaft outside the ratchet, and one end of the safety rope is fixedly sleeved on the reel.

[0016] Further, ratchet teeth are provided on the surfaces of both the ratchet and the concave semi-circular structure.

[0017] Further, two pin shaft holes are provided on both sides of the lower part of the support block, and the driven block is rotationally connected to the support block through a pin shaft.

[0018] Further, the tops of the two driven blocks are respectively fixedly connected to both ends of the spring through screws.

[0019] Further, the spring is a compression spring.

[0020] Further, a spring cushion block is provided between the bottom of the anti-falling device and the bottom shell.

[0021] Further, guide rail grooves are provided on the inner side wall of the housing in the vertical direction, and both ends of the support shaft are installed in the guide rail grooves to slide up and down.

[0022] Further, a cover plate is installed at the upper opening of the housing.

[0023] Further, the position of the wire hole is opened directly below the safety rope when it hangs naturally on the reel.

[0024] Beneficial effects:

[0025] The anti-falling device of the present utility model can effectively prevent the operator from falling and bumping during the high-altitude climbing process through rapid braking, and significantly improve the operation safety.

[0026] The anti-falling device of the present utility model has a compact structure and is convenient to install, and can be widely applied to various models of straight-ladder tower cranes and other scenarios requiring high-altitude climbing operations.

[0027] The present utility model provides an anti-falling device applied to a straight-ladder tower crane. Through innovative technical solutions and design concepts, it effectively solves the safety problems in high-altitude climbing operations and provides a safer and more reliable operation environment for the operators of straight-ladder tower cranes. Description of the drawings

[0028] The following further specific description of the present utility model will be made in conjunction with the accompanying drawings and specific embodiments, and the above and / or other advantages of the present utility model will become clearer.

[0029] Figure 1 It is the front view of the partial schematic diagram of the anti-falling device in an embodiment.

[0030] Figure 2 It is the top view of the partial schematic diagram of the anti-falling device in an embodiment.

[0031] Figure 3 It is the front view of the overall structure of the anti-falling device in an embodiment.

[0032] Figure 4 It is the A-A cross-sectional view of the overall structure of the anti-falling device in an embodiment.

[0033] Figure 5 It is the isometric view of the schematic diagram of the anti-falling device in an embodiment.

[0034] Figure 6 It is the exploded view in an embodiment.

[0035] In the figure: 1 is the housing; 2 is the bottom shell; 3 is the cover plate; 4 is the wire hole; 5 is the support shaft; 6 is the anti-falling device; 7 is the drum; 8 is the ratchet; 9 is the ratchet tooth; 10 is the support block; 11 is the pin hole; 12 is the driven block; 13 is the pin; 14 is the screw; 15 is the spring; 16 is the spring pad; 17 is the safety rope; 18 is the guide rail groove. Specific Embodiments

[0036] The present utility model provides an anti-falling device applied to a straight-ladder tower crane. This anti-falling device adopts a unique design principle and structure, and can quickly activate the braking system and lock the falling trajectory once an accidental fall occurs during the operation of an operator climbing the straight ladder, effectively protecting the life safety of the operator.

[0037] The present utility model effectively solves the risks of falling and bumping that the operators of straight-ladder tower cranes may face during the process of climbing up and down the tower, and significantly improves the operation safety. The specific technical solution is as follows: An anti-falling device applied to a straight-ladder tower crane, as Figure 3 shown, includes:

[0038] The housing 1, which is a hollow box body with openings at the bottom and top, is detachably connected to the bottom shell 2 and the cover plate 3 respectively, and a round hole 4 is opened on the bottom shell 2;

[0039] As Figure 6 shown, a guide rail groove 18 is provided on the inner side wall of the housing 1 in the vertical direction, and both ends of the support shaft 5 slide inside the guide rail groove 18, and the guide rail groove 18 is used to limit the sliding direction of the support shaft 5;

[0040] An anti-falling device 6 is provided on the support shaft 5;

[0041] The anti-falling device 6 includes: a driven block 12, a ratchet wheel 8, ratchet teeth 9, a support block 10, a pin shaft 13, a spring 15, a screw 14, and a winding drum 7;

[0042] As Figure 4 shown, the winding drum 7 is rotatably sleeved on the support shaft 5.

[0043] As Figure 5 shown, a safety rope 17 is fixedly sleeved on the winding drum 7. When the winding drum 7 rotates forward, the safety rope 17 is retracted. When it rotates backward, the safety rope 17 is released;

[0044] As Figure 1 shown, the upper part of the support block 10 is an inwardly concave semi-circular structure, which forms a fit with the ratchet wheel 8 to provide stable support for the ratchet wheel 8. Two pin holes 11 are opened at the lower end of the support block 10;

[0045] There are two driven blocks 12, which are respectively installed in the pin holes 11 through the pin shafts 13 and can rotate around the pin shafts. An arc-shaped groove is provided on the side of the driven block 12 close to the ratchet wheel 8, and ratchet teeth 9 are provided on the inner side of the groove;

[0046] Ratchet teeth 9 are also provided on the circumference of the ratchet wheel 8. When the left and right driven blocks 12 are held tightly, the ratchet teeth 9 are engaged and locked to brake the ratchet wheel 8;

[0047] When the winding drum 7 is subjected to a downward pulling force, the winding drum 7 together with the ratchet wheel 8 and the support block 10 are pressed downward, and the pin shaft 13 is pressed downward, thereby driving the two driven blocks 12 to hold tightly;

[0048] As Figure 2 shown, screws 14 are respectively provided at the tops of the two driven blocks 12, and the two ends of the spring 15 are fixed by the screws 14. The spring 15 is a compression spring. In the normal state, the two driven blocks 12 are kept at a certain angle, which does not affect the normal rotation of the ratchet wheel 8 and the winding drum 7.

[0049] As Figure 6 shown, the lower part of the anti-falling device 6 is elastically connected to the bottom case 2 through a spring pad 16.

[0050] Embodiment:

[0051] I. Structural composition

[0052] A specific anti-falling device in this embodiment, as Figure 6 shown, mainly consists of the following parts:

[0053] Housing 1: Made of high-strength material, such as Figure 3As shown, it is a hollow box body with openings at both the top and bottom. The top and bottom surfaces of the housing 1 are respectively connected to the bottom shell 2 and the cover plate 3 by bolts or other fastening methods, facilitating the installation and maintenance of internal components.

[0054] The bottom shell 2 is provided with a circular wire hole 4 for passing the safety rope through.

[0055] Support shaft 5: As Figure 4 shown, it is installed on the inner side wall of the housing 1 and is used to support and fix the main components of the anti-falling device 6.

[0056] Anti-falling device 6, as Figure 5 shown, includes the following components:

[0057] Drum 7: It is installed on the end face of the ratchet 8 and is connected to the safety rope. The drum can rotate around the support shaft 5 to realize the retraction and extension of the safety rope 17.

[0058] Ratchet 8: It is fixedly connected to the drum 7, and ratchet teeth 9 are provided at both ends of the circumference, and no ratchet teeth are provided in the middle of the circumference to reduce the frictional resistance.

[0059] Ratchet teeth 9: They are respectively provided at both ends of the circumference of the ratchet 8 and inside the arc-shaped groove of the driven block 12 and are used to engage and lock during braking.

[0060] Support block 10: The upper part is an inwardly concave semi-circular structure, which forms a fit with the ratchet 8 to provide stable support for the ratchet. Two pin holes 11 are opened at the lower end of the support block.

[0061] Driven block 12: As Figure 1 shown, two symmetrical driven blocks are installed in the pin holes 11 through pins 13 and can rotate around the pins. An arc-shaped groove is provided on one side of the driven block, and ratchet teeth are provided inside the groove, corresponding to the ratchet teeth of the ratchet 8.

[0062] Pin 13: Connects the driven block 12 and the support block 10, enabling the driven block to rotate around the pin.

[0063] Screw 14: It is installed at the upper end of the driven block and is used to fix the spring 15 and adjust the compression force of the spring.

[0064] Spring 15: It is a compression spring, as Figure 2 shown, it is installed at the upper end of the driven block and is fixed by the screw 14. The function of the spring is to keep the driven block at a certain angle when there is no external force, without affecting the normal rotation of the ratchet and the drum.

[0065] II. Installation method

[0066] Install the housing 1 at an appropriate position on the tower crane straight ladder to ensure that the housing 1 is stable and does not shake.

[0067] Install the support shaft 5 on the inner side wall of the housing 1 and adjust it to the appropriate position.

[0068] Install the reel 7 on the end face of the ratchet 8 and connect the safety rope properly.

[0069] Install the ratchet 8 on the support block 10.

[0070] Install the two driven blocks 12 in the pin holes 11 of the support block 10 through the pins 13 to ensure that the driven blocks can rotate freely.

[0071] Install the spring 15 and the screw 14, and adjust the compression force of the spring so that the driven blocks maintain a certain angle when not subject to external forces.

[0072] III. Working Principle

[0073] When the operator climbs the straight ladder normally, the reel 7 rotates with the retraction and release of the safety rope, and the ratchet 8 and the driven blocks 12 remain relatively stationary, without affecting the normal activities of the operator.

[0074] Once an accidental fall occurs, the safety rope is subjected to a downward pulling force, driving the reel 7 and the ratchet 8 to quickly press down. At this time, the pin 13 is subjected to a downward pressure, pushing the driven block 12 to rotate around the pin, so that the ratchet teeth on the inner side of the arc grooves of the two driven blocks are engaged with the ratchet teeth of the ratchet 8, thereby locking the ratchet and the reel and preventing the safety rope from continuing to be released, achieving the purpose of fall prevention.

[0075] Since the fall arrester in this embodiment adopts a multi-ratchet design, the braking is rapid and reliable, which can effectively avoid the risk of bumping during the fall of personnel and ensure the life safety of the operator. At the same time, the fall arrester has a compact structure and is convenient to install, and is applicable to various models of straight-ladder tower cranes.

[0076] The present utility model provides an idea and method for a fall arrester applied to a straight-ladder tower crane. There are many methods and ways to specifically implement this technical solution. The above description is only the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model. Each component not clearly defined in this embodiment can be implemented by using the existing technology.

Claims

1. A fall arrester applied to a straight ladder type tower crane, characterized in that, Comprising: A housing (1) fixedly installed on the straight ladder of the tower crane. The housing (1) is a hollow box body with openings at both the upper and lower ends. A bottom shell (2) is installed at the lower opening, and a wire hole (4) is provided on the bottom shell (2); A support shaft (5) is slidably arranged in the vertical direction on the inner side wall of the housing (1). The support shaft (5) passes through the anti-falling device (6), and the bottom of the anti-falling device (6) is elastically connected to the bottom shell (2); One end of the anti-falling device (6) is fixedly connected to one end of a safety rope (17). The other end of the safety rope (17) passes through the wire hole (4) and exits the housing (1) to be connected to the person to be protected from falling.

2. The anti-falling device applied to the straight-ladder type tower crane according to claim 1, characterized in that, The anti-falling device (6) includes: A support block (10) elastically connected to the bottom shell (2). The lower two sides of the support block (10) are respectively movably connected to the bottoms of two driven blocks (12); The tops of the two driven blocks (12) are elastically connected, and the middle part is a concave semi-circular structure; A ratchet wheel (8) is arranged in the two concave semi-circular structures. The ratchet wheel (8) is sleeved on the support shaft (5); A reel (7) is also sleeved on the support shaft (5) outside the ratchet wheel (8). One end of the safety rope (17) is fixedly sleeved on the reel (7).

3. The anti-falling device for a straight-ladder type tower crane according to claim 2, wherein, Ratchet teeth (9) are provided on the surfaces of the ratchet wheel (8) and the concave semi-circular structure.

4. The anti-falling device for a straight-ladder type tower crane according to claim 2, characterized in that, The lower two sides of the support block (10) are provided with two pin shaft holes (11). The driven block (12) is rotatably connected to the support block (10) through a pin shaft (13).

5. The anti-falling device for a straight-ladder type tower crane according to claim 2, wherein, The tops of the two driven blocks (12) are respectively fixedly connected to both ends of a spring (15) through screws (14).

6. The anti-falling device for a straight-ladder type tower crane according to claim 5, characterized in that, The spring (15) is a compression spring.

7. The anti-falling device applied to the straight-ladder type tower crane according to claim 1, characterized in that, A spring cushion block (16) is provided between the bottom of the anti-falling device (6) and the bottom shell (2).

8. The anti-falling device for a straight-ladder type tower crane according to claim 1, characterized in that, Guide rail grooves (18) are provided on the inner side wall of the housing (1) in the vertical direction. Both ends of the support shaft (5) are installed in the guide rail grooves (18) and slide up and down.

9. The anti-falling device for a straight-ladder type tower crane according to claim 1, characterized in that, A cover plate (3) is installed at the upper opening of the housing (1).

10. The anti-falling device applied to the straight-ladder type tower crane according to claim 1, characterized in that, The position of the wire hole (4) is arranged directly below the natural vertical drop of the safety rope (17) on the reel (7).

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