Method for hoisting tripod by using hoisting belt

Abstract

The invention provides a method for hoisting a tripod by using a sling, the tripod comprises a front support rod and a rear pull rod, the tripod is arranged on a crane revolving platform, the tripod is hoisted by using a hoisting device, the hoisting device comprises a front lifting hook, a rear lifting hook and the sling, and the method comprises the following specific steps: connecting the front support rod with the rear pull rod; one end of the sling is connected with the sling connecting position of the front support rod, and the other end of the sling is connected with the sling connecting position of the rear pull rod; the rear lifting hook runs to pull up the front supporting rod to be close to one side of the lifting belt, so that the lifting belt is in a straightened state; the front lifting hook and the rear lifting hook cooperatively operate to pull the front supporting rod to be close to one side of the front lifting hook, so that the rear pull rod is in a vertical state; the front lifting hook and the rear lifting hook operate together, and the front supporting rod and the rear pulling rod are moved to the position above the rotary platform; the front supporting rod and the rear pulling rod are connected with the corresponding positions of the rotary platform, and operation is convenient, safe and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of crane tripod equipment, and in particular to a method for hoisting a tripod by using a sling. Background Art

[0002] The tripod is an auxiliary rope collecting and balancing force component on the crane, and plays a key role in the crane. The tripod generally needs to be installed on a revolving platform. The tripod includes a vertical rod and an inclined rod. For example, when installing a tripod on a ship crane, in order to avoid the tripod being offset from the installation position when hoisting the tripod to the installation position, resulting in the inability to install it, it is necessary to select a suitable lifting point and lifting method so that the position of the vertical rod or the inclined rod can be adjusted when hoisting the tripod to eliminate assembly errors, so that the tripod can be normally installed on the revolving platform.

[0003] For example, the patent application number is 201811120504.1, and the announcement date is 2021.05.04. The patent document discloses a method for assembling a crane tripod. First, the first door frame and the second door frame are assembled on the slewing platform; then the main cross bar is assembled between the first door frame and the second door frame; then the third cross tie rod is assembled between the first diagonal bar and the second diagonal bar; finally, more than two secondary cross bars are assembled between the first vertical bar and the second vertical bar, and the secondary vertical bar and the diagonal tie rod are assembled between the two adjacent secondary cross bars; the first cross tie rod which is segmented and connected by flanges is assembled between the first vertical bar and the first diagonal bar, and the main cross bar and the third cross tie rod are also assembled in segments by flange connection. This assembly method can prevent the first cross tie rod, the main cross bar and the third cross tie rod from being unable to be assembled normally due to production errors and assembly errors, and has good stability.

[0004] In the above literature, the tripod is pre-assembled on the rotary platform before leaving the factory. After assembly, marks are made on each component, and the bolts and nuts between the flanges are removed. After arriving at the installation site, the tripod can be assembled according to the marks. The use of this method to assemble the tripod avoids the error between the assembly position and the preset position after the tripod is hoisted to the rotary platform. However, it is necessary to pre-install the tripod on the rotary platform to determine the assembly position of the tripod, which increases the time for assembling the tripod. In addition, in order to ensure that the diagonal brace rod and the rear connecting rod are set at a certain angle in the existing tripod, it is necessary to fix the diagonal brace rod and the rear connecting rod at a certain angle. A connecting rod is set between the connecting rods to support the diagonal brace rod and the rear connecting rod. However, during the pre-installation process, the diagonal brace rod needs to be lifted by a lifting tool and then a connecting rod is set between the diagonal brace rod and the rear connecting rod. The connecting rod also needs to be lifted by a lifting tool and then connected by welding or the like, which makes the entire lifting process more complicated, and the cost of lifting and connecting rods is high. After the connecting rod is connected, if there is a small difference between the installation distance of the installation platform and the distance between the front strut and the rear pull rod, the connecting rod needs to be reinstalled, which makes the reliability of the entire installation poor. Summary of the invention

[0005] The invention provides a method for hoisting a tripod using a sling, which is convenient for installation, has low hoisting cost and high reliability.

[0006] To achieve the above object, the technical solution of the present invention is: a method for hoisting a tripod using a sling, wherein the tripod comprises a front support rod and a rear pull rod, the rear end of the front support rod and the rear end of the rear pull rod are connected by a flexible sling, and the tripod is hoisted onto a rotating platform using a lifting device, wherein the lifting device comprises a front hook, a rear hook and a sling, and the specific steps include: S1 presets the connection position of the front support rod and the rear tie rod, the corresponding lifting position of the front hook and the rear hook on the front support rod, the connection position of the front support rod and the rear tie rod sling and the length of the rear tie rod; the sling parameters are determined according to the distance between the installation position of the front support rod and the installation position of the rear tie rod on the slewing platform; S2 connects the front hook to the front hook position on the front support rod, and the rear hook to the rear hook position on the front support rod; S3 The front hook and the rear hook are operated so that the front end of the front support rod is close to the front end of the rear tie rod, and the front support rod and the rear tie rod are arranged obliquely so as to connect the front end of the front support rod with the front end of the rear tie rod; S4 determines the sling according to the sling parameters, and connects one end of the sling to the front support rod sling connection position, and the other end of the sling to the rear pull rod sling connection position; S5 rear hook operates, pull up the front support rod close to one side of the sling, so that the sling is in a straightened state; When the front hook of S6 is running, pull up the front support rod close to the side of the front hook, so that the rear tie rod is in a vertical state; the rear hook keeps the sling in a straight state; The S7 front and rear hooks operate together to move the front support rod and rear tie rod above the slewing platform; S8 connects the front support rod and the rear pull rod to the corresponding positions of the rotating platform.

[0007] In the above arrangement, the tripod is installed on the revolving platform of the marine crane, the rear pull rod is placed on the deck of the ship, the front hook and the rear hook are connected to the front support rod, the position of the front support rod can be moved and the inclination setting of the front support rod relative to the rear pull rod can be adjusted through the front hook and the rear hook, and then the front end of the front support rod and the rear pull rod are connected, and then the sling parameters are determined in advance according to the distance between the front support rod and the rear pull rod on the revolving platform, and then the rear ends of the front support rod and the rear pull rod are connected through the flexible sling with determined sling parameters, and then one side of the front support rod is pulled up through the front hook until the rear pull rod is in a vertical state relative to the deck, and the rear hook makes the sling in a straightened state, so that the flexible sling can play the role of the existing front support rod and the rear pull rod. The connecting rod acts to turn the tripod over, and then the turned-over tripod is moved above the crane's revolving platform, and then the front support rod and the rear pull rod are connected to the corresponding positions of the revolving platform to achieve the installation of the tripod. During the entire lifting process, there is no need to first lift and weld between the front support rod and the rear pull rod, which makes the installation process simple and reduces production costs. At the same time, during the lifting process by the front hook and the rear hook, the rear hook keeps the sling in a straightened state to ensure the role of the connecting rod between the front support rod and the rear pull rod, thereby ensuring the reliability of the tripod installation. When there is a small difference between the spacing between the installation platforms and the actual spacing between the tripods, the adjustment can be achieved by moving the front support rod and the rear pull rod, and the method is simple.

[0008] Furthermore, in step S3, when the front hook and the rear hook move the front support rod to above the rear pull rod, the front hook operates to tilt the front support rod close to the front hook, and the front end of the front support rod is hinged to the front end of the rear pull rod.

[0009] With the above arrangement, when the front hook and the rear hook move the front support rod to the top of the rear pull rod, the front hook continues to move downward, so that the front support rod uses the rear hook position as a fulcrum, and the front support rod is tilted downward near the front hook, so that the front support rod can be connected to the rear pull rod. Furthermore, in step S4, the relative distance between the front support rod sling connection position and the rear pull rod sling connection position is adjusted by operating the rear hook, so that the sling can be connected to the front support rod and the rear pull rod respectively.

[0010] In the above arrangement, since in step S3, one side of the front hook of the front strut is tilted downward, the front strut sling connection position is far away from the rear pull rod sling connection position, and then the sling is installed at the front strut sling connection position and the rear pull rod sling connection position to achieve the installation of the sling.

[0011] Furthermore, before step S6, step S60 is also included: the front hook and the rear hook operate together to lift the tripod to a preset distance, and the preset distance is not less than the length of the rear pull rod.

[0012] The above arrangement ensures that the tripod does not come into contact with the deck when adjusting its position and angle. The front hook and the rear hook lift the tripod a short distance at least equal to the length of the rear pull rod, so that in the subsequent step S6, the tripod does not come into contact with the deck during the process of adjusting its position, thereby protecting the overall structure of the tripod. Further, in step S6, the front hook is pulled upward, the rear hook remains stationary and the sling is in a straightened state, the rear pull rod is observed, the rear pull rod is in a vertical state, and the front hook stops rising.

[0013] With the above arrangement, the front hook is pulled upward and the rear hook remains stationary, so that the front support rod is in an inclined state. The rear pull rod is observed so that it remains vertical under the action of its own gravity. At this time, the sling is in a tensioned state, and the front hook stops rising, so that the rear pull rod is in a vertical state.

[0014] Furthermore, in step S7, when the front hook and the rear hook operate together to transport the tripod to the rotating platform, the rear pull rod remains in a vertical state and the sling is in a straight state.

[0015] With the above arrangement, during the process of transporting the tripod by the front hook and the rear hook, the rear pull rod remains in a vertical state, so that the rear pull rod remains vertical under the action of its own gravity and the sling remains in a taut state. During hoisting, the overall structure of the tripod is more solid, preventing the front support rod and the rear pull rod from colliding during the transport of the tripod.

[0016] Furthermore, in step S8, the rear pull rod is first connected to one side of the rotating platform, the rear hook is operated, the position of the front support rod is adjusted, and the front support rod is connected to the other side of the rotating platform.

[0017] With the above arrangement, when the tripod is moved to the corresponding position of the revolving platform, the rear pull rod can be connected to the revolving platform first. After the rear pull rod is connected to the revolving platform, the position of the front support rod can be adjusted through the rear hook without worrying about the overall balance of the tripod, so that the front support rod can be connected to the revolving platform. Furthermore, in step S1, the sling parameters include the length of the sling and the maximum preload force of the sling. The length of the sling is determined according to the distance between the installation position of the front strut and the installation position of the rear tie rod on the rotating platform, the distance between the sling installation position on the front strut and the installation hole on the front strut, and the angle between the sling and the straight line where the installation holes on the front strut and the installation holes on the rear tie rod are located. The maximum preload force of the sling is determined according to the gravity of the rear tie rod, as well as the length and center of gravity of the rear tie rod.

[0018] The above settings can determine the length and maximum preload of the sling according to the installation position of the front support rod and the rear pull rod on the slewing platform, which is convenient for subsequent control of the sling in a straightened state.

[0019] Furthermore, step S5 also includes: the rear hook operates so that the tension of the sling is not greater than the maximum pre-tightening force, so that the sling is in a straightened state.

[0020] The above settings facilitate the control of the sling to be in a straightened state. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is one of the overall structural schematic diagrams of the present invention.

[0022] Figure 2 This is the second schematic diagram of the overall structure of the present invention.

[0023] Figure 3 It is a schematic diagram of the overall structure of the present invention installed on a rotary platform.

[0024] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0025] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0026] Explanation of the accompanying figures: 1-lifting device; 11-front hook; 12-rear hook; 2-tripod; 21-front support rod; 22-rear pull rod; 3-sling; 4-deck; 5-rotating platform; upper front support rod installation position 61; rear pull rod installation position 62; rear pull rod center of gravity position 63; sling front support rod installation position 64. DETAILED DESCRIPTION

[0027] like Figure 1-5 As shown, a method for hoisting a tripod using a sling, the tripod 2 includes a front support rod 21 and a rear pull rod 22, and the tripod 2 is hoisted onto a rotating platform using a lifting device 1, the lifting device 1 includes a front hook 11, a rear hook 12 and a flexible sling 3, and the specific steps include: S1 presets the connection position of the front support rod 21 and the rear tie rod 22, the corresponding lifting position of the front hook 11 and the rear hook 12 on the front support rod 21, the connection position of the sling 3 between the front support rod 21 and the rear tie rod 22, and the length of the rear tie rod 22; determines the parameters of the sling 3 according to the distance between the installation position of the front support rod 21 and the installation position of the rear tie rod 22 on the rotating platform 5; In this embodiment, the sling parameters include the length of the sling 3 and the maximum preload force of the sling 3. The length of the sling 3 is determined according to the distance between the installation position of the front strut and the installation position of the rear tie rod on the rotating platform, the distance between the sling installation position on the front strut and the installation hole on the front strut, and the angle between the sling and the straight line where the installation holes on the front strut and the installation holes on the rear tie rod are located. The maximum preload force of the sling is determined according to the gravity of the rear tie rod, as well as the length and center of gravity of the rear tie rod.

[0028] like Figure 4and 5 As shown, the horizontal distance s3 and the vertical distance d1 from the center of the front strut installation position 64 of the sling to the center of the front strut installation position 61 on the rotating platform are measured, and the distance s2 between the front strut installation position and the rear pull rod installation position on the rotating platform is measured. The angle A between the sling and the vertical direction is determined by tanA=s3 / (s2-d1), and the sling length s4=s3 / sinA.

[0029] Confirm the center of gravity position 63 of the rear tie rod, the weight g1 of the rear tie rod 22, the length s5 of the rear tie rod 22, and the center of gravity position s6 to the center of the circle of the rear tie rod installation position 62, and calculate the gravity g2 from the center of gravity position 63 of the rear tie rod to the rear tie rod installation position 62, F1*s5=g2*(s5-s6), F1 is the tension of the sling on the rear tie rod in the vertical direction, and the carrying capacity of the sling F=F1*cosA.

[0030] In another embodiment, the parameters of the rotary platform may be preset to obtain empirical values ​​of the sling measured through multiple tests.

[0031] S2 connects the front hook 11 to the front hook 11 position on the front support rod 21, and connects the rear hook 12 to the rear hook 12 position on the front support rod 21; S3 The front hook 11 and the rear hook 12 are in operation, so that the front end of the front support rod 21 is close to the front end of the rear pull rod 22, and the front support rod and the rear pull rod are tilted to connect the front end of the front support rod 21 with the front end of the rear pull rod 22; in this embodiment, the front support rod 21 and the rear pull rod 22 are hinged by a pulley frame.

[0032] S4 determines the sling according to the sling parameters, and connects one end of the sling 3 to the sling 3 connection position of the front support rod 21, and the other end of the sling 3 to the sling 3 connection position of the rear pull rod 22; S5 The rear hook 12 operates, pulling up the front support rod 21 close to one side of the sling 3, so that the sling 3 is in a straightened state; S6 The front hook 11 and the rear hook 12 work together to pull up the front support rod 21 close to the side of the front hook 11, so that the rear pull rod 22 is in a vertical state; the rear hook keeps the sling in a straightened state; S7 The front hook 11 and the rear hook 12 operate together to move the front support rod 21 and the rear pull rod 22 to above the revolving platform 5; S8 connects the front strut 21 and the rear tie rod 22 to the corresponding positions of the revolving platform 5, the tripod 2 is installed on the revolving platform 5 of the ship crane, the rear tie rod 22 is placed on the deck 4 of the ship, the front hook 11 and the rear hook 12 are connected to the front strut 21, and the position of the front strut 21 can be moved and the inclination angle of the front strut 21 relative to the rear tie rod 22 can be adjusted through the front hook 11 and the rear hook 12, so that the front strut 21 and the rear tie rod 22 are connected together, and then one side of the front strut 21 is pulled up through the front hook 11, so that the rear tie rod 22 is in a vertical state relative to the deck 4, the tripod 2 is moved above the revolving platform 5 of the crane, and then the front strut 21 and the rear tie rod 22 are connected to the corresponding positions of the revolving platform 5.

[0033] In step S3, when the front hook 11 and the rear hook 12 move the front strut 21 to above the rear pull rod 22, the front hook 11 operates to tilt the front strut 21 close to the side of the front hook 11, and connect the front end of the front strut 21 with the front end of the rear pull rod 22. When the front hook 11 and the rear hook 12 move the front strut 21 to above the rear pull rod 22, the front hook 11 continues to move downward, so that the front strut 21 uses the position of the rear hook 12 as a fulcrum. Therefore, the front strut 21 tilts downward close to the side of the front hook 11, so that the front strut 21 can be connected to the rear pull rod 22.

[0034] In step S4, the relative distance between the connection position of the front strut 21 and the rear pull rod 22 with the sling 3 can be adjusted by operating the rear hook 12, so that the sling 3 can be connected to the front strut 21 and the rear pull rod 22 respectively. Since in step S3, one side of the front hook 11 of the front strut 21 tilts downward, the connection position of the sling 3 of the front strut 21 is far away from the connection position of the sling 3 of the rear pull rod 22, when the distance between the connection position of the sling 3 of the front strut 21 and the connection position of the sling 3 of the rear pull rod 22 is greater than the length of the sling 3, the rear hook 12 can be moved downward to move the connection position of the front strut 21 and the sling 3 close to the connection position of the rear pull rod 22 and the sling 3, so that one end of the sling 3 is connected to the connection position of the sling 3 on the front strut 21, and the other end of the sling 3 is connected to the connection position of the sling 3 on the rear pull rod 22.

[0035] Before step S6, step S60 is also included: the front hook 11 and the rear hook 12 operate together to lift the tripod 2 by a preset distance, and the preset distance is not less than the length of the rear rod 22. To ensure that the tripod 2 does not contact the deck 4 when adjusting the position and angle, the front hook 11 and the rear hook 12 lift the tripod 2 by a short distance of at least the length of the rear rod 22, so that in the subsequent step S6, the tripod 2 will not contact the deck 4 during the process of adjusting the position, thereby protecting the overall structure of the tripod 2. like Figure 2As shown, in step S6, the front hook 11 is pulled up, the rear hook 12 remains stationary, the rear pull rod 22 is observed, and the rear pull rod 22 is in a vertical state, the front hook 11 stops rising, the front hook 11 is pulled up, and the rear hook 12 remains stationary, so that the front support rod 21 and the rear pull rod 22 are in an inclined state, and the rear pull rod 22 is observed, so that the rear pull rod 22 remains in a vertical state under the action of its own gravity, and at this time, the sling 3 is in a taut state under the action of the rear hook 12, and the front hook 11 stops rising, so that the rear pull rod 22 is in a vertical state.

[0036] In step S7, the front hook 11 and the rear hook 12 work together to move the tripod 2 horizontally to the rotating platform 5, and the rear pull rod 22 remains in a vertical state. In the process of transporting the tripod 2 by the front hook 11 and the rear hook 12, the force of the front hook 11 is balanced with the entire gravity of the tripod, and the rear hook 12 makes the sling in a straightened state, so that the rear pull rod will not swing left and right, so that the rear pull rod 22 remains in a vertical state, so that the rear pull rod 22 remains vertical under the action of its own gravity and the sling 3 remains taut. During hoisting, the overall structure of the tripod 2 is more solid, preventing the front support rod 21 and the rear pull rod 22 from colliding during the transportation of the tripod 2.

[0037] like Figure 3 As shown, in step S8, the rear pull rod 22 is first connected to one side of the rotating platform 5, and the rear hook 12 is operated to adjust the position of the front support rod 21, and the front support rod 21 is connected to the other side of the rotating platform 5. When the tripod 2 moves to the corresponding position of the rotating platform 5, the rear pull rod 22 can be connected to the rotating platform 5 first. After the rear pull rod 22 is connected to the rotating platform 5, the position of the front support rod 21 can be adjusted by the rear hook 12. There is no need to worry about the overall balance of the tripod 2, so that the front support rod 21 can be connected to the rotating platform 5. The working principle of the present invention is as follows: the tripod 2 is installed on the rotating platform 5 of the marine crane, the rear tie rod 22 is placed on the deck 4 of the ship, the front hook 11 and the rear hook 12 are connected to the front support rod 21, the front hook 11 and the rear hook 12 are operated, the front support rod 21 is moved to the corresponding position of the rear tie rod 22, the front support rod 21 is connected to the rear tie rod 22, one end of the sling 3 is connected to the front support rod 21, and the other end of the sling 3 is connected to the rear tie rod 22, the rear hook 12 is operated, the front support rod 21 is pulled up close to the side of the sling 3, so that the sling 3 is in a straightened state, the front hook 11 and the rear hook 12 are operated together, the tripod 2 is lifted by a preset distance, and the preset distance is at least the length of the rear tie rod 22, so that the tripod 2 can adjust its position. During the process of transporting the tripod 2 to the rotating platform 5, the rear pull rod 22 remains in a vertical state and the sling 3 is in a tightened state. The front hook 11 stops rising, and the front hook 11 and the rear hook 12 work together. During the process of transporting the tripod 2 to the rotating platform 5, the rear pull rod 22 remains in a vertical state. The rear pull rod 22 is first connected to one side of the rotating platform 5, and the rear hook 12 runs to adjust the position of the front support rod 21 and connect the front support rod 21 to the other side of the rotating platform 5. The connection is achieved through a flexible sling, and there is no need for hoisting and welding to achieve the connection of the pull rod between the front support rod and the rear pull rod. The operation method is simple and low in cost.

Claims

1. A method for hoisting a tripod using a sling, the tripod comprising a front support rod and a rear pull rod, characterized in that: The rear end of the front support rod and the rear end of the rear pull rod are connected by a flexible sling, and the tripod is hoisted onto the slewing platform by a lifting device, wherein the lifting device includes a front hook, a rear hook and a sling. The specific steps include: S1 presets the connection position of the front support rod and the rear tie rod, the corresponding lifting position of the front hook and the rear hook on the front support rod, the connection position of the front support rod and the rear tie rod sling and the length of the rear tie rod; the sling parameters are determined according to the distance between the installation position of the front support rod and the installation position of the rear tie rod on the slewing platform; S2 connects the front hook to the front hook position on the front support rod, and the rear hook to the rear hook position on the front support rod; S3 The front hook and the rear hook are operated so that the front end of the front support rod is close to the front end of the rear tie rod, and the front support rod and the rear tie rod are arranged obliquely so as to connect the front end of the front support rod with the front end of the rear tie rod; S4 determines the sling according to the sling parameters, and connects one end of the sling to the front support rod sling connection position, and the other end of the sling to the rear pull rod sling connection position; S5 rear hook operates, pull up the front support rod close to one side of the sling, so that the sling is in a straightened state; When the front hook of S6 is running, pull up the front support rod close to the side of the front hook, so that the rear tie rod is in a vertical state; the rear hook keeps the sling in a straight state; The S7 front and rear hooks operate together to move the front support rod and rear tie rod above the slewing platform; S8 connects the front support rod and the rear pull rod to the corresponding positions of the rotating platform.

2. The method for suspending a tripod using a sling according to claim 1, characterized in that: In step S3, when the front hook and the rear hook move the front support rod to above the rear pull rod, the front hook operates to tilt the front support rod close to the front hook, and the front end of the front support rod is hinged to the front end of the rear pull rod.

3. The method for suspending a tripod using a sling according to claim 1, characterized in that: In step S4, the relative distance between the front support rod sling connection position and the rear pull rod sling connection position is adjusted by the operation of the rear hook, so that the sling can be connected to the front support rod and the rear pull rod respectively.

4. The method for suspending a tripod using a sling according to claim 1, characterized in that: Before step S6, the method further includes step S60: the front hook and the rear hook operate together to lift the tripod by a preset distance, and the preset distance is not less than the length of the rear pull rod.

5. The method for suspending a tripod using a sling according to claim 1, characterized in that: In step S6, the front hook is pulled upward, the rear hook remains stationary and the sling is in a straightened state, the rear pull rod is observed, the rear pull rod is in a vertical state, and the front hook stops rising.

6. The method for suspending a tripod using a sling according to claim 1, characterized in that: In step S7, when the front hook and the rear hook operate together to transport the tripod to the rotating platform, the rear pull rod remains in a vertical state and the sling is in a straight state.

7. The method for suspending a tripod using a sling according to claim 1, characterized in that: In step S8, the rear pull rod is first connected to one side of the rotary platform, the rear hook is operated, the position of the front support rod is adjusted, and the front support rod is connected to the other side of the rotary platform.

8. The method for suspending a tripod using a sling according to claim 1, characterized in that: In step S1, the sling parameters include the length of the sling and the maximum preload force of the sling. The length of the sling is determined according to the distance between the installation position of the front strut and the installation position of the rear tie rod on the slewing platform, the distance between the sling installation position on the front strut and the installation hole on the front strut, and the angle between the sling and the straight line where the installation holes on the front strut and the installation holes on the rear tie rod are located. The maximum preload force of the sling is determined according to the gravity of the rear tie rod, the length of the rear tie rod, and the center of gravity.

9. The method for suspending a tripod using a sling according to claim 8, characterized in that: Step S5 also includes: the rear hook operates so that the tension of the sling is not greater than the maximum pre-tightening force, so that the sling is in a straightened state.

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