A fall prevention device for scaffolding

Abstract

This invention proposes a fall arrest device for scaffolding, comprising: a drive unit, a hinge rod, and two brake blocks. The two brake blocks are spaced apart along the extension direction of the guide rail and are rotatably connected to a wall mount. The rotation axes of the two brake blocks are perpendicular to the extension direction of the guide rail. The ends of the two brake blocks near the wall mount are hinged together by the hinge rod. The drive unit is mounted on the wall mount and is connected to the guide rail for transmission. The drive unit can selectively drive the hinge rod to reciprocate along the extension direction of the guide rail. When the guide rail moves rapidly relative to the wall mount, the drive unit can drive the hinge rod to move in the direction of the guide rail movement, thereby causing the brake block on the side closest to the guide rail movement direction to rotate and engage with the guide rail for braking. This invention has a reasonable structural design and can simultaneously achieve fall arrest and impact prevention, showing promising application prospects.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment for lifting scaffolds, and in particular to a fall protection device for scaffolds. Background Technology

[0002] The lifting scaffold is a high-efficiency scaffold derived from the suspended climbing scaffold. It consists of a horizontal truss and multiple layers of scaffolding set on the horizontal truss. The lifting scaffold can move up and down in conjunction with the brackets attached to the building wall.

[0003] The primary function of the hanging bracket is to provide a fulcrum for scaffolding ascent, while also ensuring the stability and safety of the scaffolding. Therefore, the hanging bracket itself also has a fall protection function. In existing technology, the fall protection device on the hanging bracket generally adopts a locking structure, which utilizes the inability of the locking block to rebound in time during rapid descent to achieve the locking function between the hanging bracket and the slide rail, thus preventing a fall. However, existing locking structures usually rely on excessive speed drive in one direction between the hanging bracket and the slide rail. That is, when the slide rail moves rapidly downward relative to the hanging bracket, it can trigger the fall protection, but when the slide rail moves rapidly upward relative to the hanging bracket, the corresponding locking function cannot be achieved. For some scaffoldings that use counterweights as auxiliary drives, if the drive end fails, the counterweight may cause the scaffolding to overshoot, causing danger.

[0004] Therefore, how to provide a fall arrest device for scaffolding that can prevent both falls and impacts has become one of the urgent technical problems to be solved. Summary of the Invention

[0005] In view of this, the present invention proposes a fall protection device for scaffolding, which aims to provide a more reasonable structural design that can simultaneously achieve the functions of fall protection and top-impact prevention.

[0006] The technical solution of this invention is implemented as follows: This invention provides a fall arrest device for scaffolding, comprising: a wall-mounted base, a top rod, and a guide device. One side of the wall-mounted base is fixed to the side of the building wall. A top rod is rotatably mounted on the upper end of the wall-mounted base. A guide device that cooperates with the guide rail of the scaffolding is provided on the side of the wall-mounted base away from the wall. The device also includes: a drive device, a hinge rod, and two brake blocks. The two brake blocks are spaced apart along the extension direction of the guide rail. Both brake blocks are rotatably connected to the wall-mounted base. The rotation axes of the two brake blocks are perpendicular to the extension direction of the guide rail. The ends of the two brake blocks near the wall-mounted base are hinged together by the hinge rod. The drive device is mounted on the wall-mounted base and is connected to the guide rail for transmission. The drive device can selectively drive the hinge rod to reciprocate along the extension direction of the guide rail. When the guide rail moves rapidly relative to the wall-mounted base, the drive device can drive the hinge rod to move in the direction of the guide rail movement and drive the brake block on the side near the direction of the guide rail movement to rotate to abut against the guide rail for braking.

[0007] In some embodiments, the drive device includes: a rotating shaft, a rotary damper, an elastic element, and a lever. The rotating shaft is rotatably mounted on the wall mount and is perpendicular to the extension direction of the guide rail. The rotating shaft is connected to the surface of the guide rail. Rotary dampers are coaxially mounted at both ends of the rotating shaft. The rotating shaft and the rotating part of the rotary damper are coaxially connected. The two ends of the lever are fixedly connected to the fixed parts of the two rotary dampers respectively. The lever is elastically connected to the wall mount through the elastic element. The lever is connected to the hinge rod. When the guide rail moves at normal speed, the displacement of the hinge rod is insufficient to drive the brake block to abut against the guide rail for braking.

[0008] In some embodiments, the drive wheel, driven wheel, and transmission belt are also included. The drive wheel is rotatably mounted on the wall mount, the driven wheel is coaxially keyed to the shaft, and the drive wheel and driven wheel are driven by the transmission belt. The drive wheel is in rolling contact with the guide rail surface.

[0009] In some embodiments, an adjustment block is also included, the drive wheel is rotatably mounted on the adjustment block, and the wall mount is provided with an adjustment groove in a direction perpendicular to the wall surface, and the adjustment block is adjustablely installed in the adjustment groove.

[0010] In some embodiments, the surface of the lever is provided with a slider, and the surface of the hinge rod is provided with a guide groove along the direction perpendicular to the length of the hinge rod, and the slider is slidably disposed in the guide groove.

[0011] In some embodiments, the elastic element includes two tension springs, which are elastically connected to the two sides of the lever block along the extension direction of the guide rail. The ends of the two tension springs away from the lever block are connected to the surface of the wall mount. The elastic extension direction of the two tension springs is parallel to the extension direction of the guide rail. When the lever block is not driven by the rotation damper and the two tension springs are in a state of force balance, neither of the two brake blocks will brake against the guide rail.

[0012] In some embodiments, a limiting groove is formed on the surface of the brake block near the guide rail end along the extension direction of the guide rail.

[0013] In some embodiments, the guiding device includes at least two sets of guide wheels, each set of guide wheels including two guide wheels respectively disposed on the two sides of the wall mount along the extension direction perpendicular to the guide rail, and multiple sets of guide wheels are spaced apart on the surface of the wall mount along the extension direction of the guide rail.

[0014] In some embodiments, the top rod includes a rotating rod and an extension rod. The end of the rotating rod near the wall mount is rotatably hinged to the wall mount, and the end of the rotating rod away from the wall mount is adjustablely connected to the extension rod. The extension rod can reciprocate relative to the rotating rod along its axial direction, and the end of the extension rod away from the rotating rod is provided with a locking groove.

[0015] In some implementations, the extension rod is threadedly connected to the rotating rod.

[0016] The scaffolding fall arrest device of the present invention has the following advantages over the prior art:

[0017] The scaffolding fall arrest device of the present invention uses two brake blocks for braking and is linked by a drive device and a hinge rod structure. It can prevent falls of lifting scaffolding and also prevent top impact, making it safer than conventional scaffolding fall arrest devices.

[0018] By using a rotary damper as the driving structure, and utilizing the damping effect and the relationship between rotational speed and torque, the brake block structure can be kept unbraked at the safe speed of the guide rail. However, when the speed of the guide rail is too fast, the lever can be driven to rotate and the brake block can be brought into the braking range to brake the guide rail. The structural design of this application is simple and reasonable and has good application prospects. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is an isometric view of the anti-fall device for scaffolding of the present invention;

[0021] Figure 2 for Figure 1 Exploded view;

[0022] Figure 3 This is a side sectional view of the anti-fall device for scaffolding of the present invention;

[0023] Figure 4 This is an exploded view of the connection structure between the lever and the rotating shaft in the scaffolding fall arrestor of the present invention;

[0024] Figure 5 This is an isometric view of the scaffolding anti-fall device of the present invention in one of the anti-fall braking states;

[0025] Figure 6 This is an isometric view of the scaffolding anti-fall device of the present invention in one of its anti-fall braking states.

[0026] In the diagram: 1-Wall mount, 2-Top rod, 3-Guide device, 4-Drive device, 5-Hinge rod, 6-Brake block, 7-Adjusting block, 11-Adjusting groove, 21-Rotating rod, 22-Extension rod, 31-Guide wheel, 41-Rotating shaft, 42-Rotation damper, 43-Elastic element, 44-Toggle block, 45-Driving wheel, 46-Driven wheel, 47-Transmission belt, 431-Tension spring, 441-Slider, 51-Guide groove, 61-Limiting groove. Detailed Implementation

[0027] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0029] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments of this invention pertain. If any definition stated in this section is contrary to or otherwise inconsistent with a definition stated in a patent, patent application, published patent application, or other publication incorporated herein by reference, the definitions listed here shall prevail over those incorporated herein by reference.

[0032] like Figure 1 As shown, combined Figure 2-6 The scaffolding fall arrestor of the present invention includes: a wall mount 1, a top rod 2, and a guide device 3. The wall mount 1 includes a vertically arranged fixing plate, clamping plates arranged parallel to each other at opposite ends of the fixing plate in the horizontal direction, and a support plate arranged horizontally on the side of the fixing plate away from the wall. The surface of the fixing plate is provided with through grooves and / or through holes, which can fix the fixing plate to the vertical wall surface. The top rod 2 is rotatably mounted on the upper surface of the support plate. A guide device 3 is provided on the opposite side of the clamping plates on both sides. The guide device 3 is used to slide with the lifting guide rail on the scaffolding. A driving device 4, a hinge rod 5, and two brakes are also provided between the two clamping plates. The moving block 6 and two brake blocks 6 are arranged vertically at intervals. The two brake blocks 6 rotate around a fixed axis. The fixed axis is horizontally connected between the two clamping plates and is parallel to the fixed plate. The ends of the two brake blocks 6 near the fixed plate are hinged together by a hinge rod 5. The driving device 4 is arranged between the two clamping plates and is connected to the guide rail for transmission. When the guide rail slides relative to the wall mount 1 beyond the safe speed, the driving device 4 can selectively drive the hinge rod 5 to reciprocate in the vertical direction under the driving action of the guide rail. Specifically, the driving device 4 can drive the hinge rod 5 to move in the direction of the guide rail and drive the brake block 6 on the side near the direction of the guide rail to rotate until it abuts against the guide rail for braking.

[0033] In the above embodiments, two brake blocks 6 are provided and connected by a hinge rod 5 to form a linkage structure. When the hinge rod 5 moves upward, the upper brake block 6 rotates and the end of the upper brake block 6 away from the fixed plate enters the braking zone of the guide rail. At the same time, the lower brake block 6 rotates and moves away from the guide rail. When the hinge rod 5 moves downward, the lower brake block 6 rotates and the end of the lower brake block 6 away from the fixed plate enters the braking zone of the guide rail. At the same time, the upper brake block 6 rotates and moves away from the guide rail. When the hinge rod 5 is in the middle position, neither the upper nor lower brake block 6 can brake. In the above embodiments, the side of the guide rail near the wall mount 1 is provided with parallel and spaced horizontal bars in the vertical direction. The horizontal bars are used to cooperate with the top rod 2 and the brake blocks 6 to support and brake the lifting scaffold. When braking, the brake blocks 6 abut against the surface of the horizontal bars.

[0034] In some embodiments, the drive device 4 includes a rotating shaft 41, a rotary damper 42, an elastic element 43, and a lever 44. The rotating shaft 41 is horizontally rotatably disposed between two clamping plates, and the axis of the rotating shaft 41 is parallel to the fixed plate. Both ends of the rotating shaft 41 are coaxially provided with rotary dampers 42, which are infinite angle type rotary dampers 42. The rotating shaft 41 and the rotating part of the rotary damper 42 are coaxially keyed together. The lever 44 is fixedly connected to the fixed parts of the two rotary dampers 42. At the same time, the lever 44 is elastically connected to the support plate through the elastic element 43. The rotating shaft 41 is drivenly connected to the guide rail surface, and the lever 44 is drivenly connected to the hinge rod 5. When the guide rail is displaced relative to the wall mount 1 at its normal speed, the rotation speed of the shaft 41 is low, and the fixed end of the rotary damper 42 is insufficient to generate enough torque to drive the lever 44 to deform the elastic element 43. At this time, the lever 44 remains stable, and the two brake blocks 6 cannot rotate to achieve the braking purpose. When the guide rail slides beyond the normal speed, the rotation speed of the shaft 41 is high, and the fixed end of the rotary damper 42 generates a greater torque. At this time, the lever 44 overcomes the elastic force of the elastic element 43 and deforms under the drive of the torque of the damper 42. At this time, the lever 44 rotates and drives the hinge rod 5 to move. The two brake blocks 6 rotate with the movement of the hinge rod 5 and achieve the corresponding braking purpose.

[0035] Unlike conventional fall protection devices, the above-mentioned fall protection structure uses two braking blocks 6, which can selectively resist and block in different directions according to the rapid sliding of the guide rail in different directions, so as to achieve both fall protection and anti-collision.

[0036] In some embodiments, the system further includes a drive wheel 45, a driven wheel 46, and a transmission belt 47. The drive wheel 45 is rotatably mounted on the wall mount 1, and the driven wheel 46 is coaxially keyed to the rotating shaft 41. The drive wheel 45 and the driven wheel 46 are driven by the transmission belt 47, and the drive wheel 45 is in rolling connection with the guide rail surface.

[0037] In the above embodiment, as an example of a feasible transmission connection between the guide rail and the rotating shaft 41, a driving wheel 45 and a driven wheel 46 are used for transmission. Specifically, the rotation axis of the driving wheel 45 is parallel to the rotating shaft 41. The driving wheel 45 is rolled on the surface of the guide rail. During the rolling process of the driving wheel 45, the driven wheel 46 is driven to rotate through the transmission belt 47. The rotation of the driven wheel 46 drives the rotating shaft 41 to rotate. In the above example, the rotation direction of the driving wheel 45 is the same as the rotation direction of the driven wheel 46. Therefore, when the guide rail falls rapidly downwards, after being driven by the driving wheel 45, the transmission belt 47, and the driven wheel 46, as... Figure 6 As shown, the lower brake block 6 extends and brakes the guide rail, while the upper brake block extends and brakes the guide rail.

[0038] In some embodiments, the transmission belt 47 may be a chain structure, and the corresponding drive pulley 45 and driven pulley 46 may be gears.

[0039] In some embodiments, gears can also be used as a transmission structure to transmit power between the guide rail and the rotating shaft 41. Depending on the transmission system, the rotation direction of the corresponding paddle 44 may be opposite to that of the drive wheel.

[0040] In some embodiments, an adjustment block 7 is also included. The drive wheel 45 is rotatably mounted on the adjustment block 7. The surface of the clamping plate on the wall mount 1 is provided with an adjustment groove 11 in a direction perpendicular to the plane where the fixed plate is located. The adjustment block 7 is adjustablely installed in the adjustment groove 11.

[0041] In the above embodiments, an adjusting block 7 is provided to adjust the rolling contact between the drive wheel 45 and the guide rail, so as to maintain a tight contact between the drive wheel 45 and the guide rail. Specifically, the adjusting groove 11 is used to limit and guide the adjusting block 7, and the adjusting block 7 can be finally fastened to the wall mount 1 with bolts.

[0042] In some embodiments, the surface of the lever 44 is provided with a slider 441 protruding outwards, and the surface of the hinge rod 5 is provided with a guide groove 51 along the direction perpendicular to the length of the hinge rod 5, and the slider 441 is slidably disposed in the guide groove 51.

[0043] The specific working structure of the above embodiments can be found by referring to Figure 3 and Figure 5 , Figure 6 In the above embodiments, the length direction of the guide groove 51 is approximately perpendicular to the length direction of the hinge rod 5. To prevent the slider 441 from receiving the direction perpendicular to the inner wall of the guide groove 51 under the action of the rotational torque of the lever 44, the guide groove 41 can be set to not be perpendicular to the rotational arm direction of the slider 441.

[0044] In some embodiments, the elastic element 43 includes two tension springs 431, which are elastically connected to the two sides of the lever block 44 along the vertical direction of the guide rail. The ends of the two tension springs 431 away from the lever block 44 are connected to the surface of the wall mount 1. The elastic extension direction of the two tension springs 431 is parallel to the extension direction of the guide rail. When the lever block 44 is not driven by the rotation damper 42 and the two tension springs 431 are in a state of force balance, neither of the two brake blocks 6 will brake against the guide rail.

[0045] In the above embodiments, the lever 44 includes a rotating part and a lever arm protruding from the rotating part. The rotating part is coaxially arranged with the rotating shaft 41, and the lever arm is used for transmission with the hinge rod 5. To prevent the lever arm from swinging down under its own weight, two tension springs 431 are provided to keep the lever arm horizontal or nearly horizontal in a stable state. At this time, the lever arm and the hinge rod 5 are in a linked state, such as Figure 3 As shown, this will prevent both brake blocks 6 from making contact with the guide rail. To provide a connection point for the lower tension spring 431, a second support plate is provided below the lower brake block 6. The second support plate is used to connect the lower tension spring 431.

[0046] It should be understood that the two tension springs 431 are deformed under the rotation of the lever block 44, and the torque required for the deformation is provided by the rotary damper 42. Therefore, the selection of the rotary damper 42 should be based on the following: when the corresponding brake block 6 can reach the braking position, the resultant force of the torque of the two tension springs 431 and the self-weight of the lever arm is the same as the torque of the fixed end of the rotary damper 42 at the safe speed limit.

[0047] In some embodiments, a limiting groove 61 is formed on the surface of the brake block 6 near one end of the guide rail along the extension direction of the guide rail.

[0048] In the above embodiments, when the brake block 6 is driven to abut against the guide rail and brake, if the brake block 6 and the guide rail cannot be locked, the lever 44 may continue to return to the equilibrium state under the drive of the elastic member 43. At this time, the brake block 6 disengages from the guide rail, and the guide rail may overspeed again. Therefore, a through groove 61 is provided to cooperate with the crossbar on the guide rail to achieve the locking purpose and prevent the brake block 6 from resetting.

[0049] In some embodiments, the guide device 3 includes at least two sets of guide wheels 31, each set of guide wheels 31 including two guide wheels 31 respectively disposed on the two sides of the wall mount 1 along the direction perpendicular to the extension of the guide rail, and multiple sets of guide wheels 31 are spaced apart on the surface of the wall mount 1 along the direction of extension of the guide rail.

[0050] In the above embodiments, at least two guide wheels 31 are arranged in a vertical array on the opposite side of the two clamping plates and at the end near the fixed plate. The guide wheels 31 are used to limit the guide rail and allow the guide rail to slide relative to the wall mount 1.

[0051] In some embodiments, the top rod 2 includes a rotating rod 21 and an extension rod 22. The end of the rotating rod 21 near the wall mount 1 is rotatably hinged to the wall mount 1, and the end of the rotating rod 21 away from the wall mount 1 is adjustablely connected to the extension rod 22. The extension rod 22 can reciprocate relative to the rotating rod 21 along its axial direction, and the end of the extension rod 22 away from the rotating rod 21 is provided with a locking groove.

[0052] In the above embodiments, the top rod 2 is used to support the lifting scaffold. The rotating rod 21 can make the top rod 2 swing as a whole, thereby selecting to support the scaffold or allowing the scaffold to move up and down. The extension rod 22 can make the overall length of the top rod 2 adjustable. Different lengths of top rod 2 can be selected according to different support scenarios. The snap-fit ​​slot structure is usually matched with the support and positioning structure of the lifting scaffold.

[0053] In some embodiments, the extension rod 22 is threadedly connected to the rotating rod 21.

[0054] In the above embodiments, by rotating the extension rod 22, the extension length of the extension rod 22 can be changed, thereby changing the overall length of the top rod 2.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fall arrestor for scaffolding, comprising: The scaffold includes a wall mount, a top rod, and a guide device. One side of the wall mount is fixed to the side of the building wall. A top rod is rotatably mounted on the upper end of the wall mount. A guide device that cooperates with the guide rail of the scaffold is mounted on the side of the wall mount away from the wall. The scaffold further includes a drive device, a hinge rod, and two brake blocks. The two brake blocks are spaced apart along the extension direction of the guide rail. Both brake blocks are rotatably connected to the wall mount, and their rotation axes are perpendicular to the extension direction of the guide rail. The ends of the two brake blocks near the wall mount are hinged together by the hinge rod. The drive device is mounted on the wall mount and is connected to the guide rail. The drive device can selectively drive the hinge rod to reciprocate along the extension direction of the guide rail. When the guide rail moves rapidly relative to the wall mount, the drive device can drive the hinge rod to move in the direction of the guide rail movement, and drive the brake block near the direction of the guide rail movement to rotate until it abuts against the guide rail for braking. The drive device includes a rotating shaft, a rotation damper, an elastic element, and a lever. The rotating shaft is rotatably mounted on the wall mount and is perpendicular to the extension direction of the guide rail. The device is connected to the guide rail surface via a drive mechanism. Both ends of the rotating shaft are coaxially equipped with rotary dampers. The rotating shaft and the rotating part of the rotary damper are coaxially connected. The two ends of the lever are fixedly connected to the fixed parts of the two rotary dampers. The lever is elastically connected to the wall mount via an elastic element. The lever is also connected to the hinge rod via a drive mechanism. When the guide rail moves at normal speed, the displacement of the hinge rod is insufficient to drive the brake block to abut against the guide rail. The device also includes a drive wheel, a driven wheel, and a drive belt. The drive wheel is rotatably mounted on the wall mount, and the driven wheel is coaxially keyed to the rotating shaft. The drive wheel and driven wheel are driven by a drive belt. The drive wheel is rollingly connected to the guide rail surface. The elastic element includes two tension springs, which are elastically connected to the two sides of the lever along the guide rail extension direction. The ends of the two tension springs away from the lever are connected to the wall mount surface. The elastic extension direction of the two tension springs is parallel to the guide rail extension direction. When the lever is not driven by the rotary damper and the two tension springs are in a state of force equilibrium, neither brake block abuts against the guide rail.

2. The scaffolding fall arrestor as described in claim 1, characterized in that, It also includes an adjustment block, the drive wheel is rotatably mounted on the adjustment block, and the wall mount is provided with an adjustment groove in a direction perpendicular to the wall surface, and the adjustment block is adjustablely installed in the adjustment groove.

3. The scaffolding fall arrestor as described in claim 1, characterized in that, The surface of the lever is provided with a slider, and the surface of the hinge rod is provided with a guide groove along the direction perpendicular to the length of the hinge rod. The slider is slidably disposed in the guide groove.

4. The scaffolding fall arrestor as described in claim 1, characterized in that, A limiting groove is formed on the surface of the brake block near the end of the guide rail along the extension direction of the guide rail.

5. The scaffolding fall arrestor as described in claim 1, characterized in that, The guiding device includes at least two sets of guide wheels. Each set of guide wheels includes two guide wheels respectively disposed on the two sides of the wall mount along the direction perpendicular to the extension of the guide rail. Multiple sets of guide wheels are spaced apart on the surface of the wall mount along the direction of the extension of the guide rail.

6. The scaffolding fall arrestor as described in claim 1, characterized in that, The top rod includes a rotating rod and an extension rod. The end of the rotating rod near the wall mount is rotatably connected to the wall mount, and the end of the rotating rod away from the wall mount is adjustablely connected to the extension rod. The extension rod can reciprocate relative to the rotating rod along its axial direction, and the end of the extension rod away from the rotating rod is provided with a locking groove.

7. The scaffolding fall arrestor as described in claim 6, characterized in that, The extension rod is threadedly connected to the rotating rod.

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