A fall arrestor structure and method

Abstract

The present application relates to the field of flexible fall arresters, in particular to a fall arrester structure and a fall arresting method, comprising a housing mechanism for cooperating with and limiting a steel wire rope, an insurance mechanism for multiple locking when falling occurs, and a mounting mechanism for triggering the locking mechanism to work, the mounting mechanism is installed at the rear end of the housing mechanism through a pin shaft, the steel wire rope is connected to the housing mechanism in an up-down manner, the locking mechanism is installed inside the housing mechanism, the insurance mechanisms are symmetrically distributed on the locking mechanism, and the upper and lower ends of the housing mechanism are provided with clamping mechanisms at the positions matched with the steel wire rope. By setting multiple locking mechanisms, the problem of disconnection due to the use of a single ratchet locking in the prior art is solved, and the locking effect is improved by using extrusion locking and misalignment locking, thereby improving safety, and the clamping wheel is in a rolling state during use, reducing friction and improving practicality.

Description

Technical Field

[0001] This invention relates to the field of flexible fall arresters, and in particular to a fall arrester structure and a fall arrest method. Background Technology

[0002] The core principle of a flexible fall arrestor (also known as a speed-difference fall arrestor) is to utilize the speed difference generated when an object falls to trigger a self-locking mechanism, rapidly braking within a limited distance to prevent further fall. Its applications include: High-altitude equipment maintenance: such as the maintenance of storage tanks and pipelines in metallurgical plants and petrochemical plants, where workers need to wear it when working at heights. Lifting of valuables: In production workshops, the fall arrestor can be attached to the hoisted item to prevent accidental falls that could cause economic losses or personal injury. Multi-industry coverage: Suitable for fields requiring high-altitude or high-risk operations, such as power, bridge, and shipbuilding.

[0003] In the prior art, compared with the Chinese invention disclosed in publication number CN118698060A, a flexible fall arrestor connector is provided to lock and protect against falls by increasing the friction between the pulley and the guide rope through the rotation of the pulley. However, in actual use, it has been found that although such a structure can clamp the rope to a certain extent through the friction of the wheel, the tension during the fall is several times the weight of the human body. If there is also a load on the body, the structure that restricts the pulley from locking is very easy to break, which poses a safety hazard. Summary of the Invention

[0004] The purpose of this invention is to provide a fall arrestor structure in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] A fall arrestor structure includes a housing mechanism for engaging and limiting a steel wire rope, a safety mechanism for multiple locking in the event of a fall, and a mounting mechanism for triggering the locking mechanism. The mounting mechanism is mounted on the rear end of the housing mechanism via a pin. The steel wire rope passes through the housing mechanism vertically. The locking mechanism is installed inside the housing mechanism. The safety mechanism is symmetrically distributed on the locking mechanism. The upper and lower ends of the housing mechanism are provided with locking mechanisms at the positions where they engage with the steel wire rope.

[0007] The housing mechanism includes an outer shell, the outer shell having a through groove formed at the position of the eccentric rotating block of the mounting mechanism, and the sliding plate of the locking mechanism being provided inside the outer shell at the position of the eccentric rotating block. The sliding plate is axially slidably connected to the outer shell, and two sets of the safety mechanism are symmetrically arranged, with the safety mechanism installed on the end face of the sliding plate away from the eccentric rotating block.

[0008] The safety mechanism includes two clamping wheels, which are rotatably connected to an eccentric wheel via a ratchet assembly. The eccentric wheel is connected to the slide plate via an eccentric shaft, which passes through the slide plate and engages with a locking assembly at the rear end of the slide plate.

[0009] Preferably, a sealing plate is installed at the front end of the outer shell, and the rear end of the outer shell is connected to the eccentric rotating block via a pin. A pull rod is welded to the rear end of the eccentric rotating block. The pull rod is normally horizontal. When a fall occurs, an external rope pulls the pull rod to a downward state. When the pull rod is downward, it drives the eccentric rotating block to rotate, and the eccentric rotation of the eccentric rotating block compresses the slide plate to slide.

[0010] Preferably, the ratchet assembly between the clamping wheel and the eccentric wheel includes an inner locking block and a locking block spring. The inner locking block is connected to the clamping wheel via a pin. The inner locking block has a centrifugal rotating end and a locking end with the pin as the dividing line. The centrifugal rotating end cooperates with the clamping wheel through the locking block spring. The outer circular end face of the eccentric wheel has a toothed groove formed at the position where it cooperates with the inner locking block.

[0011] Preferably, the locking assembly at the front and rear ends of the eccentric shaft includes a mating block, a top ring, and a locking block. The eccentric shaft and the mating block are integrally formed. The locking block is fixedly connected to the outer shell and is located on the side corresponding to the mating block. The locking block is a square groove block that restricts the rotation of the mating block and the eccentric shaft. The mating block has a rounded corner on the end face corresponding to the locking block, and the rounded corner size is smaller than the groove depth of the locking block. The top ring is located on the front end face of the clamping wheel and is used to squeeze the slide plate forward when the eccentric rotating block flips down. When the eccentric wheel is squeezed forward by the slide plate, the top ring limits the clamping wheel, thereby causing misalignment between the clamping wheel and the eccentric wheel. A tension spring is provided on the end face of the slide plate away from the clamping wheel.

[0012] Preferably, the clamping wheel has two working states under the constraint of the top ring and the slide plate: a normal state and a misaligned state. The inner side of the clamping wheel has a toothed groove formed on the outer circular surface of the eccentric wheel. When the clamping wheel is in the misaligned state, a toothed groove is also provided on the outer circular surface of the corresponding eccentric shaft. When the clamping wheel is in the normal state, the toothed groove of the clamping wheel is divided into a smooth surface on the outer circular surface of the eccentric shaft.

[0013] Preferably, the locking mechanism includes a locking plate, and the steel wire rope passes through and connects to the locking plate. A locking groove is formed on the locking plate at the position through which the steel wire rope passes. The locking groove is divided into a passage area and a locking area. Under normal conditions, the steel wire rope slides through the passage area of ​​the locking groove. When the sliding plate is subjected to extrusion force and moves forward, the locking area of ​​the locking groove will lock the steel wire rope.

[0014] Preferably, the end face of the positioning plate is supported by a spring and engages with the sealing plate.

[0015] Preferably, there are two inner locking blocks, and the two inner locking blocks are symmetrically distributed about the axial direction of the clamping wheel.

[0016] Preferably, the end of the pull rod away from the eccentric rotating block has a hole for fixing an external rope, and the pull rod is positioned slightly above the circular shape of the eccentric rotating block.

[0017] A fall arrestor structure and a fall arrestor method: a) Pass a steel wire rope through the hole on the outer shell and between the two clamping wheels, and extend it out from the hole at the bottom of the outer shell. The worker connects the rope to the hole on the pull rod. At this time, the slide is in the normal state. The elastic force of the support spring and the tension spring supports the slide to the rear side located inside the outer shell.

[0018] b. When personnel are climbing, the rope will be pulled to move slowly upward with the personnel. The internal locking block inside the clamping wheel is subjected to less centrifugal force and will not get stuck. At this time, due to the friction between the wire rope and the outer shell and the locking groove, when the device is slowly pulled up, it will stop at the corresponding position through friction.

[0019] c. In the event of a fall, because the wire rope and the clamping wheel are connected by friction, and when the wire rope moves at high speed, the friction of the wire rope causes the clamping wheel to rotate at an instantaneous speed. After the clamping wheel rotates rapidly under force, the inner locking block is affected by centrifugal force. The heavier side, i.e. the centrifugal rotating end, is thrown outward by centrifugal force. At this time, because the rear part of the eccentric shaft is locked by the locking block, and the eccentric shaft and the eccentric wheel are fixedly connected and will not move, the tooth groove on one side of the locking section will cooperate with the tooth groove on the end face of the eccentric wheel to lock. Thus, the clamping wheel provides initial locking for the wire rope.

[0020] d. Because the downward force will pull the lever, causing the lever to flip downward, the lever will drive the eccentric rotating block to flip downward. Since the eccentric rotating block is eccentrically installed, when the eccentric rotating block flips, it will squeeze the internal sliding plate. After being squeezed, the sliding plate moves forward. The top ring corresponding to the front side of the clamping wheel will restrict the sliding of the clamping wheel, while the eccentric shaft and eccentric wheel continue to slide. The clamping wheel and eccentric wheel will be misaligned. At this time, the mating block at the rear of the eccentric shaft will disengage from the locking block, and the eccentric shaft and eccentric wheel can rotate. The clamping wheel does not rotate relative to the eccentric wheel. The friction between the clamping wheel and the wire rope will drive the eccentric wheel to rotate eccentrically around the eccentric shaft. Then the two clamping wheels and the eccentric shaft will move closer to each other, further locking the wire rope.

[0021] e. At the same time, as the locking plate moves forward due to the sliding plate, the steel wire rope corresponding to the locking groove switches from the passage area to the locking area, further locking the steel wire rope, thereby ensuring the locking effect between the device and the steel wire rope.

[0022] Compared with existing technologies, the beneficial effects are as follows:

[0023] By establishing multiple locking mechanisms, the problem of disengagement due to the use of a single ratchet locking mechanism in existing technologies is solved. Furthermore, by utilizing compression locking and misalignment locking methods, the locking effect is improved, thereby enhancing safety. In addition, the clamping wheel is in a rolling state during use, reducing friction and thus improving practicality. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a fall arrestor according to the present invention;

[0026] Figure 2 This is a schematic diagram of the internal first-view structure of a fall arrestor structure according to the present invention;

[0027] Figure 3 This is a schematic diagram of the internal second-view structure of a fall arrestor structure according to the present invention;

[0028] Figure 4 This is a schematic diagram of the safety mechanism structure of a fall arrestor structure according to the present invention;

[0029] Figure 5 This is an exploded structural diagram of a fall arrestor structure according to the present invention;

[0030] Figure 6 This is a first-view structural diagram of the clamping wheel of a fall arrestor structure according to the present invention;

[0031] Figure 7 This is a schematic diagram of the internal structure of the clamping wheel of the fall arrestor structure described in this invention from a second perspective.

[0032] Figure 8 This is a front sectional view of the clamping wheel of a fall arrestor structure according to the present invention;

[0033] Figure 9 This is a top view of the locking mechanism of a fall arrestor structure according to the present invention;

[0034] Figure 10 This is a diagram showing the position of the slide plate and clamping wheel in the state where the pull rod of the fall arrestor structure described in this invention is not pulled down;

[0035] Figure 11 This is a diagram showing the position of the slide plate and clamping wheel when the pull rod of the fall arrestor structure described in this invention is pulled down;

[0036] Figure 12 This is a diagram showing the position of the eccentric shaft and clamping wheel in the state where the pull rod of the fall arrestor structure described in this invention is not pulled down;

[0037] Figure 13 This is a diagram showing the position of the eccentric shaft and clamping wheel in the state where the pull rod of the fall arrestor structure described in this invention is pulled down.

[0038] The annotations in the attached figures are explained as follows:

[0039] 1. Shell mechanism; 2. Mounting mechanism; 3. Wire rope; 4. Locking mechanism; 5. Positioning mechanism; 6. Safety mechanism; 11. Outer shell; 12. Sealing plate; 21. Pull rod; 22. Eccentric rotating block; 41. Slide plate; 42. Top ring; 43. Tensioning spring; 44. Locking block; 45. Mating block; 51. Positioning plate; 52. Support spring; 53. Positioning groove; 61. Clamping wheel; 62. Eccentric shaft; 63. Eccentric wheel; 64. Inner locking block; 65. Locking block spring. Detailed Implementation

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] The present invention will be further described below with reference to the accompanying drawings:

[0042] like Figures 1-13 As shown, a fall arrestor structure includes a housing mechanism 1 for cooperating and limiting the steel wire rope 3, a safety mechanism 6 for multiple locking in the event of a fall, and a mounting mechanism 2 for triggering the locking mechanism 4. The mounting mechanism 2 is installed at the rear end of the housing mechanism 1 via a pin. The steel wire rope 3 passes through the housing mechanism 1 vertically. The locking mechanism 4 is installed inside the housing mechanism 1. The safety mechanism 6 is symmetrically distributed on the locking mechanism 4. The upper and lower ends of the housing mechanism 1 are provided with locking mechanisms 5 at the positions where they cooperate with the steel wire rope 3.

[0043] The housing mechanism 1 includes an outer shell 11. The outer shell 11 has a through groove formed at the position of the eccentric rotating block 22 of the mounting mechanism 2. The outer shell 11 has a sliding plate 41 with a locking mechanism 4 at the position of the eccentric rotating block 22. The sliding plate 41 is axially slidably connected to the outer shell 11. Two sets of safety mechanisms 6 are symmetrically arranged. The safety mechanisms 6 are installed on the end face of the sliding plate 41 and away from the end of the eccentric rotating block 22.

[0044] The safety mechanism 6 includes two clamping wheels 61, which are rotatably connected to an eccentric wheel 63 via a ratchet assembly. The eccentric wheel 63 is connected to the slide plate 41 via an eccentric shaft 62, which passes through the slide plate 41 and engages with a locking assembly at the rear end of the slide plate 41.

[0045] In this embodiment, a sealing plate 12 is installed at the front end of the outer shell 11, and an eccentric rotating block 22 is connected to the rear end of the outer shell 11 via a pin. A pull rod 21 is welded to the rear end of the eccentric rotating block 22. The pull rod 21 is horizontal in normal state. When a fall occurs, the external rope pulls the pull rod 21 to a downward state. When the pull rod 21 is downward, it drives the eccentric rotating block 22 to rotate, and the eccentric rotation of the eccentric rotating block 22 squeezes the sliding plate 41 to slide.

[0046] In this embodiment, the ratchet assembly between the clamping wheel 61 and the eccentric wheel 63 includes an inner locking block 64 and a locking block spring 65. The inner locking block 64 is connected to the clamping wheel 61 through a pin. The inner locking block 64 has a centrifugal rotating end and a locking end with the pin as the dividing line. The centrifugal rotating end cooperates with the clamping wheel 61 through the locking block spring 65. The outer circular end face of the eccentric wheel 63 has a toothed groove formed at the position where it cooperates with the inner locking block 64.

[0047] In this embodiment, the locking assembly at the front and rear ends of the eccentric shaft 62 includes a mating block 45, a top ring 42, and a locking block 44. The eccentric shaft 62 and the mating block 45 are integrally formed. The locking block 44 is fixedly connected to the outer shell 11 and is located on the side of the mating block 45. The locking block 44 is a square groove block that restricts the rotation of the mating block 45 and the eccentric shaft 62. The mating block 45 has a rounded corner on the end face of the locking block 44, and the rounded corner size is smaller than the groove depth of the locking block 44. The top ring 42 is located on the front end face of the clamping wheel 61. When the eccentric rotating block 22 flips down and squeezes the slide plate 41 forward, and the eccentric wheel 63 is squeezed forward by the slide plate 41, the top ring 42 limits the clamping wheel 61, thereby causing misalignment between the clamping wheel 61 and the eccentric wheel 63. A tension spring 43 is provided on the end face of the slide plate 41 away from the clamping wheel 61.

[0048] In this embodiment, the clamping wheel 61 has two working states under the constraint of the top ring 42 and the sliding plate 41: a normal state and a misaligned state. The inner side of the clamping wheel 61 has a toothed groove formed on the outer circular surface of the eccentric wheel 63. When the clamping wheel 61 is in the misaligned state, the corresponding outer circular surface of the eccentric shaft 62 is also provided with a toothed groove. When the clamping wheel 61 is in the normal state, the toothed groove of the clamping wheel 61 is divided into a smooth surface on the outer circular surface of the eccentric shaft 62.

[0049] In this embodiment, the locking mechanism 5 includes a locking plate 51, through which a steel wire rope 3 passes. A locking groove 53 is formed on the locking plate 51 at the position through which the steel wire rope 3 passes. The locking groove 53 is divided into a passage area and a locking area (in this embodiment, the locking groove 53 is teardrop-shaped, so the wider side is the passage area and the narrower side is the locking area). When the steel wire rope 3 slides through the passage area of ​​the locking groove 53 under normal conditions, when the slide plate 41 is subjected to extrusion force and moves forward, the locking area of ​​the locking groove 53 will lock the steel wire rope 3.

[0050] In this embodiment, the end face of the positioning plate 51 is supported by a support spring 52 in conjunction with the sealing plate 12.

[0051] In this embodiment, two inner locking blocks 64 are provided, and the two inner locking blocks 64 are symmetrically distributed along the axial direction of the clamping wheel 61.

[0052] In this embodiment, the end of the pull rod 21 away from the eccentric rotating block 22 is formed with a hole for fixing an external rope, and the pull rod 21 is located at a position slightly above the circle of the eccentric rotating block 22.

[0053] A fall arrestor structure and a fall arrestor method: a) Pass the steel wire rope 3 through the hole on the outer shell 11 and between the two clamping wheels 61, and extend it out from the hole at the bottom of the outer shell 11. The worker connects the rope to the hole on the pull rod 21. At this time, the slide plate 41 is in the normal state. The elastic force of the support spring 52 and the tension spring 43 supports the slide plate 41 to the rear side inside the outer shell 11.

[0054] b. When personnel are climbing, the rope will be pulled to move slowly upward with the personnel. The internal locking block 64 inside the clamping wheel 61 is subjected to less centrifugal force and will not get stuck. At this time, due to the friction between the wire rope 3 and the outer shell 11 and the locking groove 53, when the device is slowly pulled up, it will stop at the corresponding position through friction.

[0055] c. In the event of a fall, because the wire rope 3 and the clamping wheel 61 are connected by friction, and when the wire rope 3 moves at high speed, the wire rope 3 drives the clamping wheel 61 to rotate at an instantaneous speed through friction. After the clamping wheel 61 rotates rapidly under force, the inner locking block 64 is affected by centrifugal force. The heavier side, i.e. the centrifugal rotating end, is thrown outward by centrifugal force. At this time, because the rear part of the eccentric shaft 62 is locked by the locking block 44, and the eccentric shaft 62 and the eccentric wheel 63 are fixedly connected and will not move, the tooth groove on one side of the locking section will cooperate with the tooth groove on the end face of the eccentric wheel 63 to lock. Thus, the clamping wheel 61 provides initial locking for the wire rope 3.

[0056] d. Because the downward force will pull the lever 21, causing the lever 21 to flip downward, the lever 21 will drive the eccentric rotating block 22 to flip downward. Since the eccentric rotating block 22 is eccentrically installed, when the eccentric rotating block 22 flips, it will squeeze the internal slide plate 41. After being squeezed, the slide plate 41 moves forward. The top ring 42 corresponding to the front side of the clamping wheel 61 will restrict the sliding of the clamping wheel 61, while the eccentric shaft 62 and the eccentric wheel 63 continue to slide. The clamping wheel 61 and the eccentric wheel 63 are misaligned. At this time, the mating block 45 at the rear of the eccentric shaft 62 disengages from the locking block 44, and the eccentric shaft 62 and the eccentric wheel 63 can rotate. The clamping wheel 61 does not rotate relative to the eccentric wheel 63. The friction between the clamping wheel 61 and the wire rope 3 will drive the eccentric wheel 63 to rotate eccentrically around the eccentric shaft 62. Then the two clamping wheels 61 and the eccentric shaft 62 move closer to each other, further locking the wire rope 3.

[0057] e. At the same time, as the locking plate 51 is driven forward by the sliding plate 41, the locking groove 53 corresponding to the wire rope 3 switches from the passage area to the locking area, further locking the wire rope 3, thereby ensuring the locking effect between the device and the wire rope 3.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A fall arrestor structure, characterized in that: The device includes a housing mechanism (1) for engaging and limiting the steel wire rope (3), a safety mechanism (6) for multiple locking in the event of a fall, and a mounting mechanism (2) for triggering the locking mechanism (4). The mounting mechanism (2) is mounted on the rear end of the housing mechanism (1) via a pin. The steel wire rope (3) passes through the housing mechanism (1) vertically. The locking mechanism (4) is installed inside the housing mechanism (1). The safety mechanism (6) is symmetrically distributed on the locking mechanism (4). The upper and lower ends of the housing mechanism (1) are provided with locking mechanisms (5) at the positions where they engage with the steel wire rope (3). The housing mechanism (1) includes an outer shell (11), the outer shell (11) has a through groove formed at the position of the eccentric rotating block (22) of the mounting mechanism (2), and the sliding plate (41) of the locking mechanism (4) is provided inside the outer shell (11) at the position of the eccentric rotating block (22). The sliding plate (41) is axially slidably connected to the outer shell (11). Two sets of the safety mechanism (6) are symmetrically arranged, and the safety mechanism (6) is installed on the end face of the sliding plate (41) and away from the end of the eccentric rotating block (22). The safety mechanism (6) includes two clamping wheels (61), which are rotatably connected to an eccentric wheel (63) via a ratchet assembly. The eccentric wheel (63) is connected to the slide plate (41) via an eccentric shaft (62), which passes through the slide plate (41) and engages with a locking assembly at the rear end of the slide plate (41). Frictional connection between the wire rope (3) and the clamping wheel; The locking assembly at the front and rear ends of the eccentric shaft (62) includes a mating block (45), a top ring (42), and a locking block (44). The eccentric shaft (62) and the mating block (45) are integrally formed. The locking block (44) is fixedly connected to the outer shell (11) and is located on the side corresponding to the mating block (45). The locking block (44) is a square groove block that restricts the rotation of the mating block (45) and the eccentric shaft (62). The mating block (45) has rounded corners on the end face corresponding to the locking block (44). The rounded corner size is smaller than the groove depth of the locking block (44). The top ring (42) is set on the front end face of the clamping wheel (61) and is used to squeeze the slide plate (41) forward when the eccentric rotating block (22) flips down. When the eccentric wheel (63) is squeezed forward by the slide plate (41), the top ring (42) limits the clamping wheel (61) so that the clamping wheel (61) and the eccentric wheel (63) are misaligned. A tension spring (43) is provided on the end face of the slide plate (41) away from the clamping wheel (61). The clamping wheel (61) has two working states under the restriction of the top ring (42) and the sliding plate (41): a normal state and a misaligned state. The inner side of the clamping wheel (61) is formed with a tooth groove corresponding to the outer circle surface of the eccentric wheel (63). When the clamping wheel (61) is in the misaligned state, the corresponding outer circle surface of the eccentric wheel (63) is also provided with a tooth groove. When the clamping wheel (61) is in the normal state, the tooth groove of the clamping wheel (61) is divided into a smooth surface corresponding to the outer circle surface of the eccentric wheel (63).

2. The fall arrestor structure according to claim 1, characterized in that: A sealing plate (12) is installed at the front end of the outer shell (11). The rear end of the outer shell (11) is connected to the eccentric rotating block (22) by a pin. A pull rod (21) is welded to the rear end of the eccentric rotating block (22). The pull rod (21) is horizontal in normal state. When a fall occurs, the external rope pulls the pull rod (21) to a downward state. When the pull rod (21) is downward, it drives the eccentric rotating block (22) to rotate. The eccentric rotation of the eccentric rotating block (22) then squeezes the slide plate (41) to slide.

3. The fall arrestor structure according to claim 2, characterized in that: The ratchet assembly between the clamping wheel (61) and the eccentric wheel (63) includes an inner locking block (64) and a locking block spring (65). The inner locking block (64) is connected to the clamping wheel (61) by a pin. The inner locking block (64) has a centrifugal rotating end and a locking end with the pin as the dividing line. The centrifugal rotating end cooperates with the clamping wheel (61) through the locking block spring (65). The outer circle end face of the eccentric wheel (63) has a toothed groove formed at the position where it cooperates with the inner locking block (64).

4. The fall arrestor structure according to claim 2, characterized in that: The locking mechanism (5) includes a locking plate (51), through which the wire rope (3) passes. A locking groove (53) is formed on the locking plate (51) at the position through which the wire rope (3) passes. The locking groove (53) is divided into a passage area and a locking area. When the wire rope (3) slides through the passage area of ​​the locking groove (53) under normal conditions, the locking area of ​​the locking groove (53) will lock the wire rope (3) when the sliding plate (41) is subjected to extrusion force and moves forward.

5. The fall arrestor structure according to claim 4, characterized in that: The end face of the positioning plate (51) is engaged with the sealing plate (12) by a support spring (52).

6. The fall arrestor structure according to claim 3, characterized in that: There are two inner locking blocks (64), and the two inner locking blocks (64) are symmetrically distributed about the axial direction of the clamping wheel (61).

7. The fall arrestor structure according to claim 2, characterized in that: The end of the pull rod (21) away from the eccentric rotating block (22) has a hole for fixing an external rope, and the pull rod (21) is located at a position slightly above the circle of the eccentric rotating block (22).

8. A fall arrest method for a fall arrester structure according to any one of claims 1-7, characterized in that: a. Pass the wire rope (3) through the hole on the outer shell (11) and between the two clamping wheels (61), and extend it out from the hole at the bottom of the outer shell (11). The worker connects the rope to the hole on the pull rod (21). At this time, the slide plate (41) is in the normal state. The elastic force of the support spring (52) and the tension spring (43) supports the slide plate (41) to the rear side inside the outer shell (11). b. When personnel are climbing, the rope will be pulled to move slowly upwards with the personnel. The internal locking block (64) inside the clamping wheel (61) is subjected to less centrifugal force and will not get stuck. At this time, due to the friction between the wire rope (3) and the outer shell (11) and the locking groove (53), when the device is slowly pulled up, it will stay at the corresponding position through friction. c. If a fall occurs, because the wire rope (3) and the clamping wheel (61) are connected by friction, and when the wire rope (3) moves at high speed, the wire rope (3) drives the clamping wheel (61) to rotate at an instantaneous speed through friction. After the clamping wheel (61) rotates rapidly under force, the inner locking block (64) is affected by centrifugal force. The heavier side, i.e. the centrifugal rotating end, is thrown outward by centrifugal force. At this time, because the rear part of the eccentric shaft (62) is locked by the locking block (44), and the eccentric shaft (62) and the eccentric wheel (63) are fixedly connected and will not move, the tooth groove on one side of the locking section will cooperate with the tooth groove on the end face of the eccentric wheel (63) to lock. Then the clamping wheel (61) provides initial locking for the wire rope (3). d. Because the downward force will pull the lever (21), causing the lever (21) to flip downward, the lever (21) will drive the eccentric rotating block (22) to flip downward. Since the eccentric rotating block (22) is eccentrically installed, when the eccentric rotating block (22) flips, it will squeeze the internal slide plate (41). After being squeezed, the slide plate (41) moves forward. The top ring (42) corresponding to the front side of the clamping wheel (61) will restrict the sliding of the clamping wheel (61), while the eccentric shaft (62) and the eccentric wheel (63) continue to slide. The clamping wheel (61) When the eccentric shaft (62) and the eccentric wheel (63) are misaligned, the mating block (45) at the rear of the eccentric shaft (62) disengages from the locking block (44), and the eccentric shaft (62) and the eccentric wheel (63) can rotate. The clamping wheel (61) does not rotate relative to the eccentric wheel (63). The friction between the clamping wheel (61) and the wire rope (3) will cause the eccentric wheel (63) to rotate eccentrically around the eccentric shaft (62). Then the two clamping wheels (61) and the eccentric shaft (62) will move closer to each other and further lock the wire rope (3). e. At the same time, as the positioning plate (51) is driven forward by the sliding plate (41), the positioning groove (53) corresponding to the wire rope (3) switches from the passage area to the locking area, further locking the wire rope (3), thereby ensuring the locking effect between the device and the wire rope (3).

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