Anti-falling hanging point device for connecting safety belt, anti-falling ladder stand and meteorological wind tower

Abstract

The utility model discloses an anti-falling hanging point device for connecting a safety belt, an anti-falling crawling ladder and a meteorological wind tower. The technical problems that an existing anti-falling hanging point device for fixing a tower ladder is complex in structure, high in cost and poor in reliability are solved. The anti-falling hanging point device used for being connected with the safety belt comprises guide rails arranged in parallel along the crawling ladder, the guide rails are sleeved with anti-falling sleeves with safety belt hanging buckles, the anti-falling sleeves are hinged to a plurality of locking rods stretching into center holes of the anti-falling sleeves, the locking rods abut against the surfaces of the guide rails through torsional springs, and the outer ends of the locking rods incline downwards. The sum of the length of the lock rod extending into the center hole of the anti-falling sleeve and the diameter of the guide rail is larger than the diameter of the center hole of the anti-falling sleeve. According to the technical scheme, only one guide rail and one anti-falling sleeve are needed, the anti-falling device is simple in structure, easy to manufacture, low in cost and convenient and fast to use, more importantly, the anti-falling sleeve can be taken down from the guide rail in non-operation time, the influence of field environment corrosion is avoided, and overhauling and maintaining are convenient.

Description

Technical Field

[0001] This utility model relates to the field of safety protection technology for high-altitude operations, and in particular to a fall arrest device, a fall arrest ladder, and a weather tower for connecting safety belts. Background Technology

[0002] The selection and installation of safety belt attachment points are crucial for safety when working at heights. When choosing attachment points, ensure they are stable and reliable, capable of withstanding sufficient tension to prevent accidental detachment or breakage during work at heights. Common attachment point types include Type A attachment points with a fixed structure, Type B attachment points relying on a load-bearing structure, Type C attachment points using flexible guide rails, Type D attachment points using rigid guide rails, and Type E attachment points installed on a flat surface.

[0003] Among them, the Type A safety belt attachment device is a device that suspends the safety rope on a fixed structure. Its characteristic is that the attachment point does not move with the user's movement. This type of attachment device is usually used for high-altitude operations to ensure the safety of workers in a suspended state. The Type B safety belt attachment device refers to a device that relies on some load-bearing object as an attachment point, such as a tripod or steel structure beam used when entering a pool. The Type C safety belt attachment device is usually composed of a flexible guide rail, a safety rope, and an attachment point structure. The flexible guide rail can be made of materials such as steel wire rope that meet specific requirements. The safety rope is connected to the guide rail through the attachment point structure and can move with the user during use. The Type D safety belt attachment device is similar to the Type D attachment point of the flexible guide rail, but it uses a rigid guide rail instead of a flexible guide rail. The rigid guide rail is usually made of metal or other rigid materials, which can provide more stable support and protection. The Type E safety belt attachment device is placed on a flat surface and has a counterweight. It is usually used when there is no safety rope attachment point at the edge of a steel structure roof.

[0004] During the operation and maintenance of meteorological equipment, workers frequently need to climb up and down meteorological towers. To ensure their safety, not only are safety belts required, but hooks must also be used alternately during these ascents and descents. Specifically, the double hooks of the safety belt should be used alternately to ensure that at all times, one hook remains connected to the meteorological tower, preventing any unprotected situation. Therefore, the commonly used attachment points mentioned above cannot meet these requirements. Workers must rely on alternating connections between the double hooks of the safety belt and the structure of the meteorological tower or the ladder itself, resulting in low work efficiency. Therefore, a utility model patent with an authorization announcement date of October 12, 2021, and authorization announcement number CN 214384127 U, discloses a fixed tower ladder for meteorological towers, including a ladder body welded to the surface of the meteorological tower and an auxiliary frame. The auxiliary frame is installed on the side of the ladder body, parallel to the vertical ladder body. The auxiliary frame consists of vertical rods and horizontal plates, while the ladder body consists of treads and ladder bars. Safety collars are fitted onto the surface of the vertical rods of the auxiliary frame.

[0005] like Figure 1 As shown, the fixed tower ladder of the meteorological wind tower disclosed in the above-mentioned utility model patent is equipped with a torsion spring carrying a movable block 13 that rotates clockwise on a rotating seat 11. At the same time, the base plate 14 restricts the movable block 13 to rotate clockwise only around the pivot 12 to a horizontal state. During the worker's ascent, the safety ring 8 moves with the worker and does not require manual adjustment. By setting a movable sleeve 10 that can move upward along the ladder rod 7, during the worker's descent, pushing the movable sleeve 10 upward allows the safety ring 8 to enter the inner bend of the outer curved section 15 of the vertical rod 6. The movable block 13 moves upward to allow the safety ring 8 to move downward, and the movable sleeve 10 resets, without affecting the next use. However, the following problems exist: First, several adjustment mechanisms need to be installed sequentially on the ladder rod 7, which not only makes the structure complex and results in high manufacturing costs, but also makes it difficult to process and manufacture. Although the fixing ring 9 can be welded separately to the outer circumference of the ladder rod 7, there is a problem of how to install the return spring 17 and the movable sleeve 10 onto the ladder rod 7. Second, the movable sleeve 10 in the adjustment mechanism depends on the normal operation of the return spring 17, and the movable block 13 depends on the normal operation of the torsion spring. However, the meteorological tower is located in the field without any obstruction, making it difficult to ensure that the return spring and the torsion spring can work normally for a long time, which poses a significant safety hazard.

[0006] It should be noted that the above technical information is intended only to enhance the understanding of the overall background technology of this utility model, and should not be regarded as an admission or in any form implying that the above technical information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] To address the shortcomings in the aforementioned background technology, this utility model proposes a fall arrest point device for connecting safety belts, a fall arrest ladder, and a meteorological wind tower, which solves the technical problems of complex structure, high cost, and poor reliability of existing fixed tower ladder fall arrest point devices.

[0008] The technical solution of this application is as follows:

[0009] A fall arrestor device for connecting a safety belt includes a guide rail parallel to a ladder. A fall arrestor sleeve with a safety belt buckle is fitted over the guide rail. The fall arrestor sleeve is hinged with several locking rods extending into a central hole. Each locking rod is abutted against the surface of the guide rail via a torsion spring, with its outer end inclined downwards. The sum of the length of the locking rod extending into the central hole of the fall arrestor sleeve and the diameter of the guide rail is greater than the diameter of the central hole. This fall arrestor device for connecting a safety belt is a D-type device. The guide rail is a rigid guide rail parallel to the ladder. The fall arrestor sleeve slides along the guide rail and is connected to a buckle for securing the safety belt buckle. Therefore, as the worker wears the safety belt and climbs the ladder, the fall arrestor sleeve moves with the worker. During the worker's ascent, the locking rods on the fall arrestor sleeve engage with the outer surface of the guide rail under the action of torsion springs. Because the outer end of the locking rod is inclined downwards and avoids contact with the outer surface of the guide rail, the fall arrestor sleeve will neither slide down nor move up the guide rod when it is not being dragged by the safety belt. The fall arrestor sleeve will only move upwards with the drag of the safety belt. If the worker accidentally steps into a hole or has an accident, the fall arrestor sleeve will descend rapidly under the pull of the safety belt. At this time, the outer end of the locking rod will have an upward rotation tendency relative to the fall arrestor sleeve. The friction between the outer end of the locking rod and the guide rail will increase rapidly, thereby fixing the fall arrestor sleeve to the guide rail. The same working principle applies during the worker's descent.

[0010] Based on the above technical solutions, as a preferred technical solution for the fall arrestor device for connecting safety belts, each of the locking rods is arranged at equal intervals along the circumferential direction of the central hole of the fall arrestor sleeve.

[0011] Based on the above technical solutions, as a preferred technical solution for the fall arrestor device for connecting safety belts, the locking rods are arranged in at least two rows along the axial direction of the center hole of the fall arrestor sleeve.

[0012] Based on the above technical solutions, as a preferred technical solution for the fall arrestor device for connecting safety belts, the fall arrestor sleeve includes a detachably connected left structure and a right structure that are symmetrical about the guide rail. The locking rod is provided on both the left and right structures, and the left and right structures form the central hole of the fall arrestor sleeve.

[0013] Based on the above technical solution, as a preferred technical solution for the fall arrestor device for connecting safety belts, both the left and right structures have mounting grooves on the side facing the center hole of the fall arrestor sleeve, the inner end of the locking rod is set in the mounting groove through a rotating shaft, and the torsion spring is abutted between the rotating shaft and the mounting groove.

[0014] Based on the above technical solutions, as a preferred technical solution for the fall arrest point device for connecting safety belts, the outer surface of the guide rail is a rough surface, and the end of the locking rod that extends into the center hole of the fall arrest sleeve is connected to a traction rope, which is connected to the fall arrest sleeve through a lever mechanism.

[0015] Based on the above technical solutions, as a preferred technical solution for the fall arrestor device for connecting a safety belt, the lever mechanism includes a hinge seat connected to the bottom surface of the fall arrestor sleeve, the hinge seat is hinged to a lever, and one end of the lever is connected to the traction rope.

[0016] Based on the above technical solutions, as a preferred technical solution for the fall arrestor device for connecting safety belts, one end of the lever connected to the traction rope is an annular structure fitted with the guide rail, and each row of locking rods arranged along the axial direction of the center hole of the fall arrestor sleeve is connected to the annular structure through its respective traction rope.

[0017] A fall-prevention ladder includes a ladder and an arc-shaped protective cover covering the outside of the ladder, wherein the fall-prevention attachment device for connecting a safety belt as described in any of the above technical solutions is disposed between the ladder and the arc-shaped protective cover.

[0018] A weather tower includes a tower frame, the tower frame being connected to the fall-prevention ladder described in any of the above technical solutions.

[0019] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0020] This utility model provides a fall arrest point device for connecting safety belts, a fall arrest ladder, and a meteorological tower. The guide rail is a rigid guide rail parallel to the ladder. The fall arrest sleeve slides along the guide rail and is connected to a hook for securing the safety belt buckle. Therefore, as workers wear safety belts and climb up and down the ladder, the fall arrest sleeve moves with them. The technical solution provided by this utility model requires only one guide rail and one fall arrest sleeve that cooperates with the guide rail. It is not only simple in structure, easy to manufacture, and low in cost, but also requires no manual operation during normal climbing. More importantly, during non-working hours, the fall arrest sleeve can be removed from the guide rail, avoiding corrosion from the outdoor environment and facilitating inspection and maintenance. In the preferred technical solution, in order to further improve the fall protection effect and make the fall protection response time shorter, the elastic force of the torsion spring is set to be large enough, or the outer surface of the guide rail is made rough enough. When the fall protection sleeve gets stuck on the guide rail during the worker's descent, only the lever mechanism needs to be pressed, while no operation is required during the worker's ascent. Attached Figure Description

[0021] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 The fixed tower ladder of the existing meteorological wind tower;

[0023] Figure 2 Side view diagram of the anti-fall ladder structure;

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 This is an axial sectional view of the anti-fall sleeve and guide rail after assembly.

[0026] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0027] Figure 6 This is a top view of the anti-fall sleeve after it has been assembled with the guide rail.

[0028] Explanation of icon numbers:

[0029] Ladder 1, Arc-shaped protective cover 101;

[0030] Guide rail 2, upper crossbeam 201, lower crossbeam 202;

[0031] 3. Fall protection sleeve, 300 center hole of fall protection sleeve, 301 left structure, 302 right structure, 303 mounting groove, 304 hook, 305 bolt, 306 bolt hole;

[0032] Locking rod 4, torsion spring 401, pivot 402, traction rope 403;

[0033] Lever mechanism 5, hinge seat 501, lever 502, ring structure 503. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the core concept of the present utility model and the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0036] It should be noted that, in the description of this application, unless otherwise stated, "several" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "axial," "radial," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] Furthermore, the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0038] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" 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 can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0039] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0040] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0041] The anti-fall attachment point device for connecting safety belts provided by this utility model belongs to the D-type attachment point device, such as... Figure 2 and Figure 3 As shown, a fall arrestor device for connecting a safety belt includes a guide rail 2 parallel to a ladder 1, which serves as a rigid guide rail parallel to the ladder 1. A fall arrestor sleeve 3 with a safety belt buckle 304 is fitted over the guide rail 2, and the fall arrestor sleeve 3 slides along the guide rail 2. It should be noted that the fall arrestor sleeve 3 itself has no driving device; therefore, it will not displace relative to the guide rail 2 when not subjected to external force. Therefore, the fall arrestor sleeve 3 is connected to a buckle 304 for securing the safety belt buckle. The safety belt buckle is hooked onto the buckle 304, and the fall arrestor sleeve 3 moves accordingly as the worker, wearing the safety belt, climbs up and down the ladder 1.

[0042] like Figure 4 As shown, the fall arrestor sleeve 3 is hinged with several locking rods 4 that extend into the central hole 300 of the fall arrestor sleeve, such as... Figure 5 As shown, the locking rod 4 abuts against the surface of the guide rail 2 via a torsion spring 401. Therefore, when the fall arrestor sleeve 3 is not being pulled by the seatbelt, the torsion spring 401 can fix the fall arrestor sleeve 3 relative to the guide rail 2. Simultaneously, the outer end of the locking rod 4 is inclined downwards, and the sum of the length of the locking rod 4 extending into the central hole 300 of the fall arrestor sleeve and the diameter of the guide rail 2 is greater than the diameter of the central hole 300 of the fall arrestor sleeve.

[0043] During the worker's ascent, the locking rods 4 on the fall arrestor sleeve 3 are in frictional engagement with the outer surface of the guide rail 2 under the action of the torsion spring 401. Since the outer end of the locking rod 4 is inclined downwards and avoids contact with the outer surface of the guide rail 2, the fall arrestor sleeve 3 will neither slide down nor ascend along the guide rod 2 when not being pulled by the safety belt. The fall arrestor sleeve 3 will only move upwards with the pull of the safety belt. If the worker missteps or has an accident, the fall arrestor sleeve 4 will descend rapidly under the pull of the safety belt. The outer end of the locking rod 4 will then tend to rotate upwards relative to the fall arrestor sleeve 4, causing the friction between the outer end of the locking rod 4 and the guide rail 2 to increase rapidly, thus fixing the fall arrestor sleeve 4 to the guide rail 2. The same working principle applies during the worker's descent, and will not be elaborated further in this embodiment.

[0044] Based on the above embodiments, as a preferred embodiment of the fall arrestor device for connecting safety belts, each of the locking rods 4 is arranged at equal intervals along the circumferential direction of the center hole 300 of the fall arrestor sleeve. This embodiment provides a preferred relative relationship between the locking rods 4, the fall arrestor sleeve 3, and the guide rail 2, so that several locking rods 4 are arranged at intervals along the circumferential direction of the fall arrestor sleeve 3. The locking rods 4 can rub or lock at different positions on the outer periphery of the guide rail 2, which not only avoids the drawback that a single locking rod 4 cannot reliably prevent falls, but also forms a reliable redundant foolproof design. Whether a single locking rod 4 fails, a single torsion spring 401 fails, or the guide rail 2 is partially damaged, the fall arrest reliability of the entire device can be guaranteed.

[0045] Based on the above embodiments, in a preferred embodiment of the fall arrestor device for connecting safety belts, at least two rows of locking rods 4 are arranged along the axial direction of the center hole 300 of the fall arrestor sleeve. This embodiment provides a preferred relative relationship between the locking rods 4, the fall arrestor sleeve 3, and the guide rail 2, so that a plurality of locking rods 4 are arranged along the length direction of the fall arrestor sleeve 3, and at least two rows are arranged, further improving the redundancy and foolproof effect described in the above embodiments. Meanwhile, it is preferable that each row of locking rods 4 is equiangularly distributed around the axis of the fall arrestor sleeve 3. When two rows of locking rods 4 are provided, the two rows of locking rods 4 are symmetrical from left to right.

[0046] Based on the above embodiments, a preferred embodiment of the fall arrestor device for connecting a safety belt is as follows: Figure 3 and Figure 6As shown, the fall arrestor sleeve 3 includes a detachably connected left structure 301 and a right structure 302 that are symmetrical about the guide rail 2. Both the left and right structures 301 and 302 are equipped with the locking rod 4, and the left and right structures 301 and 302 together form the central hole 300 of the fall arrestor sleeve. This embodiment provides a preferred structural design for the fall arrestor sleeve 3, designing it as a detachable left structure 301 and right structure 302, which not only facilitates installation onto the guide rail 2 but also facilitates the installation, maintenance, and replacement of the locking rod 4 and the torsion spring 401.

[0047] Preferably, the left structure 301 and the right structure 302 are detachably connected by bolts 305. Specifically, in a direction perpendicular to the axial direction of the fall arrestor sleeve 3, the left structure 301 and the right structure 302 are provided with corresponding bolt holes 306, and the bolts 305 are threaded into the bolt holes 306. Preferably, at least four bolts 305 are provided, and they are symmetrically divided into two groups about the left and right sides of the center hole 300 of the fall arrestor sleeve. Each group includes two bolts 305, and the two bolts 305 in each group are spaced apart along the axial direction of the fall arrestor sleeve 3.

[0048] It should be noted that when the fall arrestor sleeve 3 is a one-piece structure, the guide rail 2 can be fixedly connected to the upper crossbeam 201 at its top, that is, connected to the top of the ladder 1 through the upper crossbeam 201. In this case, although the fall arrestor sleeve 3 is not detachable, it can be inserted into or removed from the guide rail 2 through the bottom end of the guide rail 2. Alternatively, the bottom end of the guide rail 2 can be connected to the ladder 1 through a detachable structure. When it is necessary to disassemble or assemble the fall arrestor sleeve 3, the structure connecting the bottom end of the guide rail 2 to the ladder 1 can be removed, and the fall arrestor sleeve 3 can then be inserted into the guide rail 2 through the bottom end of the guide rail 2. When the fall arrestor sleeve 3 is a split structure, the upper crossbeam 201 can be connected to the top of the guide rail 2, and the lower crossbeam 202 can be fixedly connected to the bottom end of the guide rail 2. The fall arrestor sleeve 3 can be inserted into the guide rail 2 from any position.

[0049] Based on the above embodiments, as a preferred embodiment of the fall arrestor device for connecting a safety belt, both the left structure 301 and the right structure 302 have mounting grooves 303 on the side facing the center hole 300 of the fall arrestor sleeve. The inner end of the locking rod 4 is set in the mounting groove 303 through a rotating shaft 402, and the torsion spring 401 is abutted between the rotating shaft 402 and the mounting groove 303.

[0050] Based on the above embodiments, in a preferred embodiment of the fall arrestor device for connecting a safety belt, the outer surface of the guide rail 2 is rough, and one end of the locking rod 4 that extends into the center hole 300 of the fall arrestor sleeve is connected to a traction rope 403. The traction rope 403 is connected to the fall arrestor sleeve 3 through a lever mechanism 5. This embodiment provides a preferred surface structure for the guide rail 2, making its outer surface sufficiently rough, further improving the fall arrest effect, shortening the fall arrest response time, and reducing the elasticity requirement of the torsion spring 401.

[0051] Correspondingly, the increased surface roughness of guide rail 2, while not affecting the upward sliding process of the fall arrestor sleeve 3, still has a negative impact. Specifically, during the worker's descent, the smoothness of the fall arrestor sleeve 3's downward movement along guide rail 2, pulled by the safety belt, is reduced. Therefore, a lever mechanism 5 and a traction rope 403 are installed between the fall arrestor sleeve 3 and the locking bar 4. If the fall arrestor sleeve 3 becomes stuck with guide rail 2 during its descent with the safety belt, simply pressing the lever mechanism 5 will unlock the fall arrestor sleeve 3 relative to guide rail 2. No further operation is required during the worker's upward movement.

[0052] Based on the above embodiments, as a preferred embodiment of the fall arrestor device for connecting a safety belt, the lever mechanism 5 includes a hinge seat 501 connected to the bottom surface of the fall arrestor sleeve 3. A lever 502 is hinged to the hinge seat 501, and one end of the lever 502 is connected to the traction rope 403. This embodiment provides a preferred arrangement of the lever mechanism 5, where the hinge seat 501 is fixed to the bottom surface of the fall arrestor sleeve 3, and the end of the lever 502 is connected to the outer end of the locking rod 4 via the traction rope 403. When the lever 502 pushes the fall arrestor sleeve 3 upward relative to the locking rod 4, the locking rod 4 is simultaneously pulled outward relative to the guide rail 2, thereby achieving unlocking.

[0053] It should be noted that the principle of the lever mechanism 5 assisting in unlocking the locking rod 4 from the guide rail 2 is very simple. Essentially, it causes a relative displacement between the locking rod 4 and the fall arrestor sleeve 3. Since the guide rail 2 is fixed, changing the locking state between the locking rod 4 and the guide rail 2 requires changing the state of the locking rod 4. However, the locking rod 4 is located within the center hole 300 of the fall arrestor sleeve 3 and cannot be directly operated. Therefore, the lever mechanism 5 and the traction rope 403 between the fall arrestor sleeve 3 and the locking rod 4 can change the state between the locking rod 4 and the fall arrestor sleeve 3.

[0054] Specifically, when jamming occurs, the outer end of the locking rod 4 stops on the outer surface of the guide rail 2, and the anti-fall sleeve 3 is also stationary relative to the guide rail 2 through the locking rod 4; then, the lever 502 is pulled upward away from the end of the traction rope 403, and the hinge seat 501 acts as the fulcrum, and the traction rope 403 transmits the force to the outer end of the locking rod 4, so the anti-fall sleeve 3 deflects and moves upward relative to the locking rod 4, and at the same time, the outer end of the locking rod 4 is pulled away from the guide rail 2 by the traction rope 403.

[0055] Based on the above embodiments, as a preferred embodiment of the fall arrestor device for connecting the safety belt, one end of the lever 502 connected to the traction rope 403 is an annular structure 503 sleeved on the guide rail 2, and each row of locking rods 4 arranged along the axial direction of the center hole 300 of the fall arrestor sleeve is connected to the annular structure 503 through their respective traction ropes 403.

[0056] A fall-prevention ladder includes a ladder 1 and an arc-shaped protective cover 101 covering the outside of the ladder 1. The fall-prevention attachment device for connecting a safety belt as described in any of the above embodiments is disposed between the ladder 1 and the arc-shaped protective cover 101.

[0057] A weather tower includes a tower frame, the tower frame being connected to the fall-prevention ladder described in the above embodiments.

[0058] The above content shows and describes the basic principles, main features, and beneficial effects of this utility model. The above description is merely a preferred embodiment of this utility model and is not intended to limit it. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fall arrest connection point for connecting a safety harness, characterised in that: The device comprises guide rails (2) arranged in parallel along the ladder (1), the guide rails (2) are provided with a safety belt hanging buckle (304) and a fall arrest sleeve (3), the fall arrest sleeve (3) is hinged with a plurality of lock rods (4) extending into the center hole (300) of the fall arrest sleeve, the lock rods (4) are in abutment with the surface of the guide rails (2) through torsional springs (401), and the outer end of the lock rod (4) is inclined downward, the length of the lock rod (4) extending into the center hole (300) of the fall arrest sleeve and the diameter of the guide rail (2) are greater than the diameter of the center hole (300) of the fall arrest sleeve. The fall arrest sleeve (3) comprises a left structure (301) and a right structure (302) which are detachably connected and symmetrical with respect to the guide rail (2), the left structure (301) and the right structure (302) are provided with the lock rods (4), and the left structure (301) and the right structure (302) form the center hole (300) of the fall arrest sleeve.

2. The fall arrest lanyard connection point of claim 1, wherein: Each of the lock rods (4) is arranged at equal intervals along the circumferential direction of the center hole (300) of the fall arrest sleeve.

3. The fall arrest lanyard connection point of claim 2, wherein: The lock rods (4) are arranged in at least two rows along the axial direction of the center hole (300) of the fall arrest sleeve.

4. A fall arrest connection point for connecting a safety harness according to any one of claims 1 to 3, wherein: The left structure (301) and the right structure (302) are provided with mounting grooves (303) on the side facing the center hole (300) of the fall arrest sleeve, the inner end of the lock rod (4) is arranged in the mounting groove (303) through a rotating shaft (402), and the torsional spring (401) is in abutment between the rotating shaft (402) and the mounting groove (303).

5. The fall arrest lanyard connection point of claim 4, wherein: The outer surface of the guide rail (2) is a rough surface, one end of the lock rod (4) extending into the center hole (300) of the fall arrest sleeve is connected with a traction rope (403), and the traction rope (403) is connected with the fall arrest sleeve (3) through a lever mechanism (5).

6. The fall arrest lanyard connection point of claim 5, wherein: The lever mechanism (5) comprises a hinged seat (501) connected to the bottom surface of the fall arrest sleeve (3), the hinged seat (501) is hinged with a lever (502), and one end of the lever (502) is connected with the traction rope (403).

7. The fall arrest lanyard connection point of claim 6, wherein: The end of the lever (502) connected with the traction rope (403) is an annular structure (503) sleeved on the guide rail (2), and each row of lock rods (4) arranged along the axial direction of the center hole (300) of the fall arrest sleeve is connected with the annular structure (503) through the respective traction rope (403).

8. A fall arrest ladder, comprising a ladder (1) and an arc-shaped protective cover (101) covering the outer side of the ladder (1), characterized in that: The fall arrest hanging point device for connecting the safety belt according to any one of claims 1-7 is arranged between the ladder (1) and the arc-shaped protective cover (101).

9. A meteorological wind tower comprising a tower, characterised in that: The tower is connected with the fall arrest ladder according to claim 8.

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