A high altitude fall prevention device

Abstract

The present invention relates to a high-altitude anti-fall device. It includes a pivotally connected mounting plate and a pressure block, with a rope-pressing screw installed at the lower part of the mounting plate; a hook hanging hole and an arc-shaped guide groove are provided on the mounting plate; a grab hook assembly is also provided; a linkage limit pin and a trigger assembly connected thereto are also provided, wherein the linkage limit pin can be slidably inserted into the arc-shaped guide groove and connected to the grab hook assembly; the trigger assembly includes a locking mechanism and a torsion spring assembly; the locking mechanism includes a ratchet, which can rotate under the drive of a safety rope, and also includes a braking unit; wherein, when the ratchet rotates at an angular velocity less than a threshold value, the mounting plate and the pressure block are in a locked connection state; when the ratchet rotates at an angular velocity greater than a threshold value, the rope-pressing screw and the pressure block cooperate to press the safety rope. The present invention can automatically move up and down following the movement of the staff without manual control, and can also limit the maximum speed of the staff's descent, thereby ensuring the safety of the staff and convenient operation.

Description

Technical Field

[0001] The invention belongs to the technical field of safety protection, and in particular relates to a high-altitude anti-falling device. Background Art

[0002] Working at heights is a common practice in various production activities, particularly during the installation and routine maintenance of wind turbines. Working at heights refers to work performed at heights exceeding two meters. Safety is of paramount concern during such work, primarily preventing falls.

[0003] When workers are working at height, they must wear safety protection devices to ensure their safety and prevent injuries and falls during the climbing process. These devices include a harness strapped to the wearer's body, a safety belt attached to the wearer's back, and a safety hook at the end of the harness away from the harness. During the climbing process, workers are protected by a safety belt, a fall prevention device, and a safety rope. The upper end of the safety rope is attached to the main structure of the aerial work, while the lower end passes through the fall prevention device and extends to the ground. When workers are working at height, the safety hook of the safety belt is attached to the fall prevention device. If a worker falls, the fall prevention device automatically locks the safety rope, preventing the worker from falling further, ensuring their safety. At the same time, the worker can move freely within a certain vertical range, improving the convenience of construction.

[0004] Reference Figure 12A conventional fall arrest device includes a housing 14 with a slot for threading a safety rope 13. A lever structure is mounted on the housing 14 for locking and releasing the safety rope 13. The lever structure includes two locking arms 15 hinged to the housing 14, and a hinged link 16 hinged to the outer ends of the two locking arms 15. The hinged link 16 includes a hook hole 17 for threading a safety belt. The outer ends of the locking arms 15 are hinged ends 18, and the inner ends are locking ends 19. The operating principle is as follows: during ascent, the hinged ends 18 of the locking arms 15 are pulled upward by the lever, causing the locking ends 19 to rotate away from the safety rope 13, allowing the fall arrest device to slide smoothly upward. During descent, the hinged ends 18 move downward, causing the locking ends 19 to rotate toward the safety rope 13, thereby working together with the housing 14 to compress the safety rope 13 and stop the fall arrest device. During use, it was found that the above-mentioned anti-fall device has certain shortcomings: when the staff moves downward, thereby driving the anti-fall device to move downward, the locking swing arm 15 often presses the safety rope 13, so the staff needs to manually pull the hinged connecting rod to release the compression lock of the locking swing arm 15 on the safety rope 13, which is inconvenient to operate and has poor safety. Summary of the Invention

[0005] The present invention aims to solve the technical problems existing in the known technology and provides a high-altitude fall prevention device with reasonable structural design, convenient operation and strong safety.

[0006] The present invention adopts a technical solution to solve the technical problems existing in the known technology: a high-altitude fall prevention device includes a pivotally connected mounting plate and a pressure block, a rope pressure screw is installed at the lower part of the mounting plate, and the rope pressure screw and the pressure block cooperate to press the safety rope; a hook hanging hole and an arc-shaped guide groove are opened on the mounting plate; the device also includes a grab hook assembly, which can lock and release the mounting plate and the pressure block; the device also includes a linkage limit pin and a trigger assembly connected thereto, the linkage limit pin can be slidably inserted into the arc-shaped guide groove and connected to the grab hook assembly; the trigger assembly includes a locking mechanism connected to the linkage limit pin and a torsion spring assembly connected to the mounting plate; the locking mechanism includes a ratchet that can rotate under the drive of the safety rope, and also includes a brake unit that can brake the rotation of the ratchet; wherein, when the ratchet rotates at an angular velocity less than a threshold, the mounting plate and the pressure block are in a locked connection state; when the ratchet rotates at an angular velocity greater than the threshold, the brake unit brakes the ratchet, the mounting plate and the pressure block are in a rotatable state, and the rope pressure screw and the pressure block cooperate to press the safety rope.

[0007] The advantages and positive effects of the present invention are as follows: the present invention provides a high-altitude fall prevention device, which can lock and grip a safety rope by providing a rope-pressing screw, a mounting plate, and a pressure block; the mounting plate and the pressure block can be locked and released by providing a hook assembly; the trigger assembly including a ratchet and a brake unit, and a linkage limit pin can be provided, so that when a worker falls, the angular velocity of the ratchet reaches a threshold value, thereby activating the brake unit to brake, causing the mounting plate and the pressure block to rotate relative to each other and press the safety rope; wherein, when the worker moves up or down, the safety rope can drive the ratchet at an angular velocity less than the threshold value, and the mounting plate and the pressure block are in a locked connection state, so that the fall prevention device can move smoothly along the safety rope, avoiding the situation where the fall prevention device presses and locks the safety rope when the worker moves down, without the need for manual control by the worker. The present invention can automatically follow the movement of the worker and perform normal up and down movement, without the need for manual control by the worker, and can also limit the maximum speed of the worker's descent. When the worker falls, the fall prevention device can press the safety rope, ensuring the safety of the worker, and is convenient and flexible to operate.

[0008] Preferably: the locking mechanism also includes a shell structure connected to the linkage limiting pin, a ratchet limiting hole is opened on the shell structure, a ratchet guide pin is slidably inserted into the ratchet limiting hole, and the ratchet is inserted into the ratchet guide pin and is rotatably connected thereto.

[0009] Preferably: the braking unit includes a limit mounting pin installed on the shell structure, a limiter is rotatably connected to the limit mounting pin, and a reverse stop angle, an overspeed stop angle, a stop angle and a pulling swing arm are arranged on the outer peripheral wall of the limiter in a circumferential direction, and also includes a locking tension spring installed between the pulling swing arm and the shell structure.

[0010] Preferably: the shell structure includes two groups of locking mounting shells arranged opposite to each other, and the linkage limit pins are passed through the mounting through holes opened on each locking mounting shell; a shell mounting screw and a second limit pin are provided between the two groups of locking mounting shells to connect the two into one, and the second limit pin is low-connected to the torsion spring assembly; one end of the locking tension spring is sleeved on the shell mounting screw, and the other end is passed through the through hole opened on the pulling swing arm.

[0011] Preferably: the grab hook assembly includes an L-shaped grab hook body, a through hole is opened in the bending part of the grab hook body, and a grab hook hinge nail that rotates with it is passed through the through hole, and the grab hook hinge nail is connected to the mounting plate; one end of the grab hook body is connected to the linkage limit nail, and also includes a clamping screw installed on the pressure block that can be clamped with the open groove opened at the other end of the grab hook body.

[0012] Preferably: the torsion spring assembly includes a torsion spring mounting screw installed on the mounting plate, and a first torsion spring is sleeved on the torsion spring mounting screw; it also includes a first mounting top block screwed on the grab hook hinge nail, and a second torsion spring is sleeved on the first mounting top block; it also includes a first limiting nail installed on the mounting plate, and a second mounting top block is screwed on the first limiting nail; the two ends of the first torsion spring are respectively low-connected with the first mounting top block and the locking mechanism, and the two ends of the second torsion spring are respectively low-connected with the second mounting top block and the linkage limiting nail.

[0013] Preferably, a rope groove for the safety rope to pass through is provided on the upper portion of the pressing block, and an arc-shaped tightening convex surface is provided on the lower portion; the rope pressing screw can cooperate with the tightening convex surface to press the safety rope.

[0014] Preferably: it also includes a mounting shaft for pivotally connecting the mounting plate and the pressure block, a cover plate is rotatably connected to the mounting shaft, a hook hanging hole is provided on the cover plate, and a clamping groove is provided on the cover plate that can be clamped with the pressure rope screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention, from a front perspective;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention, from a rear perspective;

[0017] Figure 3 It is a three-dimensional schematic diagram of a partial structure of the present invention;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the locking mechanism in the present invention;

[0019] Figure 5 It is a schematic diagram of the internal structure of the locking mechanism of the present invention;

[0020] Figure 6 This is a front view of the internal structure of the locking mechanism of the present invention

[0021] Figure 7 Schematic diagram of the three-dimensional structure of the briquette in the present invention;

[0022] Figure 8 It is a schematic diagram of the operation of the locking mechanism when the operator moves upward;

[0023] Figure 9 It is a schematic diagram of the operation of the locking mechanism when the operator moves downward at a speed less than the falling speed;

[0024] Figure 10 It is a schematic diagram of the operation of the locking mechanism when the operator falls downward;

[0025] Figure 11It is a schematic diagram of the operation of the present invention when an operator falls downward;

[0026] Figure 12 It is a structural diagram of a fall prevention device in the prior art.

[0027] In the figure: 1. Mounting plate; 2. Hook hanging hole; 3. Torsion spring assembly; 3-1. First torsion spring; 3-2. Torsion spring mounting screw; 3-3. First mounting top block; 3-4. Second torsion spring; 3-5. First limiting pin; 3-6. Second mounting top block; 4. Arc guide groove; 5. Linkage limiting pin; 6. Locking mechanism; 6-1. Ratchet; 6-1-1. Ratchet angle; 6-2. Ratchet limiting hole; 6-3. Housing mounting screw; 6-4. Ratchet guide pin; 6-5. Locking tension spring; 6-6. Limit mounting pin; 6-7. Stopper; 6-7-1. Reverse stop angle; 6-7-2, overspeed stop angle; 6-7-3, stop angle; 6-7-4, pulling swing arm; 6-8, locking mounting shell; 6-9, second limit pin; 7, rope pressing screw; 8, cover plate; 9, mounting shaft; 10, snap-fit ​​groove; 11, grab hook assembly; 11-1, grab hook body; 11-2, grab hook hinge pin; 11-3, snap-fit ​​screw; 12, pressure block; 12-1, tightening convex surface; 12-2, rope groove; 13, safety rope; 14, shell; 15, locking swing arm; 16, hinged connecting rod; 17, hook through hole; 18, hinged end; 19, locking end. Implementation Method

[0028] In order to further understand the content, features and effects of the present invention, the following examples are given to explain in detail:

[0029] See Figure 1 The high-altitude fall prevention device of the present invention includes a mounting plate 1 and a pressure block 12 that are movably connected through a mounting shaft 9 and can rotate relative to each other. It also includes a cover plate 8 rotatably connected on the mounting shaft 9, and the shape of the cover plate 8 is adapted to the shape of the mounting plate 1, wherein the pressure block 12 is located between the mounting plate 1 and the cover plate 8.

[0030] A hook hole 2 is provided on the upper right part of the mounting plate 1 and the cover plate 8. During actual work, the safety hook installed at the end of the safety belt can be hooked into the hook hole 2, thereby connecting the anti-fall device to the safety harness worn by the worker. Figure 7 In this embodiment, a rope groove 12-2 is provided on the upper portion of the pressing block 12 for the safety rope 13 to pass through. In actual operation, the safety rope 13 is passed through the rope groove 12-2. In addition, an arc-shaped tightening convex surface 12-1 is provided on the lower portion of the pressing block 12. Figure 1A rope-pressing screw 7 is installed at the lower part of the mounting plate 1, which can cooperate with the tightening convex surface 12-1 to press the safety rope 13. During the actual working process, when the mounting plate 1 is rotated to the preset position, the rope-pressing screw 7 thereon will work together with the tightening convex surface 12-1 of the pressure block 12 to tighten the safety rope 13.

[0031] See further Figure 1 A snap-in groove 10 is provided on the cover plate 8 and can be snap-fitted with the rope-pressing screw 7. The snap-in groove 10 and the rope-pressing screw 7 can prevent the safety rope 13 from slipping out of the rope groove 12-2, thereby improving the safety of the anti-fall device.

[0032] like Figure 1 As shown, an arcuate guide groove 4 is formed on the mounting plate 1. A hook assembly 11 is installed between the mounting plate 1 and the pressure block 12 to lock and release the two. The hook assembly 11 also includes a linkage limit pin 5 that can be slidably inserted into the arcuate guide groove 4 and connected to the hook assembly 11. The arcuate guide groove 4 and the linkage limit pin 5 work together to limit the travel of the hook assembly 11.

[0033] See further Figure 2 In this embodiment, the hook assembly 11 includes an L-shaped hook body 11-1. A through-hole is defined at the bend of the hook body 11-1. A hook hinge pin 11-2 is inserted through the through-hole and rotatably engages with the hook. The hook hinge pin 11-2 extends through the mounting plate 1 and is connected thereto. The short arm of the hook body 11-1 is connected to the linkage limit pin 5. The hook assembly 11 also includes a clamping screw 11-3 mounted on the pressure block 12. An open slot is defined at the long arm of the hook body 11-1, which engages with the clamping screw 11-3.

[0034] In the actual working process, when the linkage limit pin 5 is located at the lower end of the arc-shaped guide groove 4, the end open slot hook of the grab hook body 11-1 is set on the clamping screw 11-3, realizing the clamping cooperation between the grab hook body 11-1 and the clamping screw 11-3, and then locking the mounting plate 1 and the pressure block 12 to prevent the two from rotating relative to each other; when the linkage limit pin 5 is toward the upper end of the arc-shaped guide groove 4, the grab hook body 11-1 rotates around the grab hook hinge pin 11-2, thereby causing the end open slot of the grab hook body 11-1 to disengage from the clamping screw 11-3, thereby releasing the locking connection between the mounting plate 1 and the pressure block 12, so that the mounting plate 1 and the pressure block 12 can rotate relative to each other under the action of external force, and then the mounting plate 1 can be rotated to the preset locking position, so that the rope pressing screw 7 thereon and the tightening convex surface 12-1 of the pressure block 12 work together to clamp the safety rope 13.

[0035] like Figure 1As shown, in order to realize that when the anti-fall device falls rapidly relative to the safety rope 13, the hook assembly 11 can release the locking connection between the mounting plate 1 and the pressure block 12, thereby allowing the mounting plate 1 to rotate to a preset locking position, this embodiment also includes a trigger assembly connected to the hook assembly 11 through a linkage limit pin 5. The trigger assembly can drive the hook assembly 11 to start, thereby releasing the locking connection between the mounting plate 1 and the pressure block 12, and driving the mounting plate 1 to rotate relative to the pressure block 12 to press the safety rope 13, so that the rope pressing screw 7 and the tightening convex surface 12-1 of the pressure block 12 work together to hold the safety rope 13 tightly.

[0036] In this embodiment, the trigger assembly includes a locking mechanism 6 connected to the linkage limit pin 5 and a torsion spring assembly 3 connected to the mounting plate 1, wherein the torsion spring assembly 3 applies pressure toward the safety rope 13 on the locking mechanism 6, so that the locking mechanism 6 contacts the safety rope 13.

[0037] like Figure 1 and Figure 4 As shown, in this embodiment, the locking mechanism 6 includes a ratchet 6-1 that is in embedded contact with the safety rope 13 and a braking unit that can brake the rotation of the ratchet 6-1; when the person moves upward, the safety rope slides downward relative to the anti-fall device, the rope hooks the ratchet 6-1, and the ratchet 6-1 rotates counterclockwise under the drive of the safety rope 13. At this time, the braking unit cannot stop the rotation of the ratchet 6-1; when the person's downward movement is slower than the falling speed, the safety rope slides upward relative to the anti-fall device, the rope hooks the ratchet 6-1, and the ratchet 6-1 rotates clockwise under the drive of the safety rope 13. Similarly, at this time, the braking unit cannot stop the rotation of the ratchet 6-1. When the rotational angular velocity of the ratchet 6-1 reaches a threshold and a person falls, the braking unit brakes the rotation of the ratchet 6-1, thereby starting the trigger assembly, so that the open groove at the end of the hook body 11-1 is disengaged from the clamping screw 11-3, thereby releasing the locking connection between the mounting plate 1 and the pressure block 12, so that the mounting plate 1 and the pressure block 12 can rotate relative to each other under the action of the safety rope 13, and the rope pressing screw 7 and the tightening convex surface 12-1 of the pressure block 12 work together to clamp the safety rope 13.

[0038] See further Figure 4 and Figure 5 The locking mechanism 6 also includes a housing structure connected to the linkage limit pin 5. In this embodiment, the housing structure includes two sets of locking mounting shells 6-8 arranged opposite each other. Each locking mounting shell 6-8 is provided with a ratchet limit hole 6-2. The ratchet limit hole 6-2 is a strip-shaped hole structure and extends toward the upper right end of the locking mounting shell 6-8. A ratchet guide pin 6-4 is slidably inserted into the ratchet limit hole 6-2. The ratchet 6-1 is inserted into the ratchet guide pin 6-4 and is rotatably connected thereto.

[0039] like Figure 1and Figure 4 As shown, a housing mounting screw 6-3 and a second stopper pin 6-9 are provided between the two sets of locking mounting housings 6-8 to connect them together. The second stopper pin 6-9 is in contact with the torsion spring assembly 3. In addition, a linkage stopper pin 5 is inserted into a mounting hole provided in each locking mounting housing 6-8, thereby connecting the hook assembly 11 and the locking mechanism 6 together.

[0040] like Figure 5 As shown, the brake unit includes a limit mounting pin 6-6 mounted on the housing structure, a limiter 6-7 is rotatably connected to the limit mounting pin 6-6, and the limiter 6-7 is located between the two sets of locking mounting shells 6-8 and can rotate around the limit mounting pin 6-6. Figure 6 The ratchet 6-1 in this embodiment has six ratchet angles 6-1-1 distributed at equal angles along the circumference. Furthermore, the outer circumferential wall of the limiter 6-7 is provided with a reverse stop angle 6-7-1, an overspeed stop angle 6-7-2, a stop angle 6-7-3, and a pull swing arm 6-7-4, all distributed along the circumference. A locking tension spring 6-5 is also installed between the pull swing arm 6-7-4 and the housing structure. One end of the locking tension spring 6-5 is sleeved over the housing mounting screw 6-3, and the other end is inserted into a through hole defined in the pull swing arm 6-7-4. For easier observation, windows corresponding to the locking tension springs 6-5 are provided in each locking mounting housing 6-8.

[0041] See further Figure 3 In this embodiment, the torsion spring assembly 3 includes a torsion spring mounting screw 3-2 mounted on the mounting plate 1, and a first torsion spring 3-1 is sleeved on the torsion spring mounting screw 3-2. The torsion spring assembly 3 also includes a first mounting top block 3-3 screwed onto the hook hinge pin 11-2, and a second torsion spring 3-4 is sleeved on the first mounting top block 3-3. The torsion spring assembly 3 also includes a first limiting pin 3-5 mounted on the mounting plate 1, and a second mounting top block 3-6 is screwed onto the first limiting pin 3-5. The two ends of the first torsion spring 3-1 are respectively in low contact with the first mounting top block 3-3 and the second limiting pin 6-9 in the locking mechanism 6, and the two ends of the second torsion spring 3-4 are respectively in low contact with the second mounting top block 3-6 and the linkage limiting pin 5.

[0042] Working principle: In actual use, when the anti-fall device needs to be installed on the safety rope 13, it is first necessary to rotate the cover plate 8 counterclockwise so that the engaging groove 10 on the cover plate 8 is disengaged from the rope pressing screw 7, and then the safety rope 13 is conveniently placed between the pressure block 12 and the locking mechanism 6, so that the safety rope 13 can slide in the rope groove 12-2; then rotate the cover plate 8 clockwise so that the engaging groove 10 is engaged with the rope pressing screw 7 again, and the staff inserts the anti-fall hook into the hook hanging hole 2, and the anti-fall device is worn. When the safety rope 13 is installed, the locking mechanism 6 presses the safety rope 13, the second limit pin 6-9 of the locking mechanism 6 is subjected to the pressure of the first torsion spring 3-1, and the linkage limit pin 5 is subjected to the pressure of the second torsion spring 3-4, thereby causing the locking mechanism 6 to be stressed, so that the entire locking mechanism 6 exerts force on the safety rope. At the same time, the ratchet 6-1 is subjected to the reaction force of the safety rope 13, forcing the ratchet guide pin 6-4 on which the ratchet 6-1 is installed to be on the upper right side of the ratchet limit hole 6-2 of the locking mounting shell 6-8, as shown in FIG. Figure 1 shown.

[0043] When the worker moves upward, the safety rope 13 slides downward relative to the anti-fall device, and the ratchet 6-1 in the locking mechanism 6 rotates on the safety rope. The running track is as follows: Figure 8 As shown, as the ratchet 6-1 rotates (as Figure 8 As shown in a), when the ratchet angle 6-1-1 of the ratchet 6-1 is turned to the reverse stop angle 6-7-1 of the limiter 6-7 (as shown in Figure 8 b), the ratchet 6-1 will be unable to rotate, and the safety rope 13 pointing downward will pull the embedded ratchet 6-1 down, and the ratchet 6-1 will pass the reverse stop angle 6-7-1 of the limiter 6-7 after being pulled down (as shown in FIG. Figure 8 c), and then, under the elastic force of the torsion spring assembly 3, the ratchet 6-1 in the locking mechanism 6 returns to its initial state (as shown in FIG. Figure 8 d), continue the next cycle (as shown in Figure 8 e).

[0044] like Figure 9 As shown, when the worker moves downward at a speed lower than the falling speed, the safety rope 13 slides upward relative to the anti-fall device, and the safety rope 13 hooks the ratchet 6-1, causing the ratchet 6-1 to rotate clockwise (as shown in FIG. Figure 9 When the ratchet angle 6-1-1 of the ratchet 6-1 is pressed clockwise to the reverse stop angle 6-7-1 of the stopper 6-7, the stopper 6-7 rotates counterclockwise (as shown in FIG. Figure 9 b); as shown in Figure 9As shown in Figure c, when the ratchet 6-1 rotates to the contact point between its ratchet angle 6-1-1 and the reverse stop angle 6-7-1 (this point is defined as the distance α), the ratchet 6-1 rotates again, and the tangential force of the reverse stop angle 6-7-1 of the limiter 6-7 disappears. Under the action of the locking tension spring 6-5, the limiter 6-7 rebounds, and the ratchet 6-1 continues to rotate and enters the next cycle (as shown in Figure 4). Figure 9 d).

[0045] like Figure 10 As shown, when a worker falls, the safety rope 13 slides upward relative to the anti-fall device, and the safety rope 13 hooks the ratchet 6-1, causing the ratchet 6-1 to rotate clockwise (as shown in FIG. Figure 10 When the ratchet angle 6-1-1 of the ratchet 6-1 is pressed clockwise to the reverse stop angle 6-7-1 of the stopper 6-7, the stopper 6-7 rotates counterclockwise (as shown in FIG. Figure 10 b); as shown in Figure 10 As shown in c, when the ratchet 6-1 rotates to the contact point α between the ratchet angle 6-1-1 and the reverse stop angle 6-7-1, the stopper 6-7 rebounds after passing the α point; when the stopper 6-7 has not rebounded to Figure 10 At the locking point shown in d (this point is defined as the locking point β), since the rotation speed of the ratchet 6-1 reaches the trigger speed at this time, the ratchet angle 6-1-1 will not rebound to the limiter 6-7. Figure 10 When the locking point β shown in d is pressed, the overspeed stop angle 6-7-2 is pressed, so that the ratchet 6-1 cannot rotate (as shown in Figure 10 e).

[0046] See further Figure 11 The action of the safety rope 13 on the ratchet 6-1 is transformed into the action on the locking mechanism 6, and the locking mechanism 6 moves to the upper right side (such as Figure 11 a and Figure 11 b), and at the same time drives the hook body 11-1 to rotate, and the hook body 11-1 releases the pressure block 12 (as shown in FIG. Figure 11 c), the mounting plate 1 in the anti-fall device rotates as a whole, the rope pressing screw 7 and the pressing block 12 press the safety rope 13, and the anti-fall device starts (as shown in FIG. Figure 11 d and Figure 11 e). When the worker is in a safe position, he or she manually holds the mounting plate 1 and the pressing block 12, pulls the safety rope 13 downward, and locks the hook body 11-1. The anti-fall device can continue to be used.

Claims

1. A high altitude fall prevention device, characterized by: The utility model comprises a mounting plate (1) and a pressing block (12) connected in a pivotal manner, wherein a rope pressing screw (7) is installed at the lower part of the mounting plate (1), and the rope pressing screw (7) and the pressing block (12) cooperate to press the safety rope (13); a hook hanging hole (2) and an arc-shaped guide groove (4) are provided on the mounting plate (1); It also includes a grab hook assembly (11) that can lock and connect / release the mounting plate (1) and the pressing block (12); It also includes a linkage limit pin (5) and a trigger assembly connected thereto, wherein the linkage limit pin (5) is slidably arranged in the arc-shaped guide groove (4) and is connected to the grab hook assembly (11); The trigger assembly includes a locking mechanism (6) connected to the linkage limit pin (5) and a torsion spring assembly (3) connected to the mounting plate (1); The locking mechanism (6) includes a ratchet (6-1) which can rotate under the drive of the safety rope (13), and also includes a brake unit which can brake the rotation of the ratchet (6-1); When the ratchet (6-1) rotates at an angular velocity less than a threshold value, the mounting plate (1) and the pressing block (12) are in a locked connection state; when the ratchet (6-1) rotates at an angular velocity greater than the threshold value, the braking unit brakes the ratchet (6-1), the mounting plate (1) and the pressing block (12) are in a state where they can rotate, and the rope pressing screw (7) and the pressing block (12) cooperate to press the safety rope (13); The locking mechanism (6) further comprises a housing structure connected to the linkage limiting pin (5), a ratchet limiting hole (6-2) being provided on the housing structure, a ratchet guide pin (6-4) being slidably inserted into the ratchet limiting hole (6-2), and a ratchet (6-1) being inserted into the ratchet guide pin (6-4) and being rotatably connected thereto; The brake unit includes a limit mounting pin (6-6) mounted on the housing structure, a limiter (6-7) rotatably connected to the limit mounting pin (6-6), a reverse stop angle (6-7-1), an overspeed stop angle (6-7-2), a stop angle (6-7-3) and a pulling swing arm (6-7-4) arranged on the outer peripheral wall of the limiter (6-7), and further includes a locking tension spring (6-5) mounted between the pulling swing arm (6-7-4) and the housing structure; The shell structure comprises two sets of locking mounting shells (6-8) arranged opposite to each other, wherein a linkage limiting pin (5) is passed through a mounting through hole provided on each locking mounting shell (6-8); a shell mounting screw (6-3) and a second limiting pin (6-9) are provided between the two sets of locking mounting shells (6-8) to connect the two sets of locking mounting shells into one body, and the second limiting pin (6-9) is low-connected to the torsion spring assembly (3); one end of the locking tension spring (6-5) is sleeved on the shell mounting screw (6-3), and the other end is passed through a through hole provided on the pulling swing arm (6-7-4).

2. The high altitude fall prevention device according to claim 1, characterized in that: The grab hook assembly (11) comprises an L-shaped grab hook body (11-1), a through hole is provided at a bent portion of the grab hook body (11-1), a grab hook hinge pin (11-2) rotatably engaged with the grab hook body (11-2) is passed through the through hole, and the grab hook hinge pin (11-2) is connected to the mounting plate (1); one end of the grab hook body (11-1) is connected to the linkage limit pin (5), and the grab hook assembly (11) further comprises a clamping screw (11-3) mounted on a pressure block (12) and capable of being clamped and engaged with an open groove provided at the other end of the grab hook body (11-1).

3. The high altitude fall prevention device according to claim 2, characterized in that: The torsion spring assembly (3) comprises a torsion spring mounting screw (3-2) mounted on the mounting plate (1), a first torsion spring (3-1) being sleeved on the torsion spring mounting screw (3-2); a first mounting top block (3-3) being screwed on the hook hinge pin (11-2), a second torsion spring (3-4) being sleeved on the first mounting top block (3-3); a first limiting pin (3-5) being mounted on the mounting plate (1), a second mounting top block (3-6) being screwed on the first limiting pin (3-5); two ends of the first torsion spring (3-1) being respectively in low contact with the first mounting top block (3-3) and the locking mechanism (6), and two ends of the second torsion spring (3-4) being respectively in low contact with the second mounting top block (3-6) and the linkage limiting pin (5).

4. The high altitude fall prevention device according to claim 3, characterized in that: A rope groove (12-2) for the safety rope (13) to pass through is provided on the upper portion of the pressing block (12), and an arc-shaped tightening convex surface (12-1) is provided on the lower portion; a rope pressing screw (7) can cooperate with the tightening convex surface (12-1) to press the safety rope (13).

5. The high altitude fall prevention device according to any one of claims 1 to 4, characterized in that: It also includes a mounting shaft (9) for pivotally connecting the mounting plate (1) and the pressure block (12), a cover plate (8) rotatably connected to the mounting shaft (9), a hook hanging hole (2) provided on the cover plate (8), and a clamping groove (10) provided on the cover plate (8) for clamping with the pressure rope screw (7).

Images