Scaffold falling protector

Abstract

A scaffold falling protector comprises a star wheel, and the star wheel is fixed on a scaffold wall-attached support through a plurality of falling-preventing fixing shafts. Limiting teeth are arranged on the periphery of the star wheel, and an anti-falling mechanism is arranged in the star wheel. The anti-falling block in the star wheel can quickly respond, and the star wheel is quickly locked by the spring when accidental falling occurs, so that self-locking is completed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of building construction, especially relate to building attached type scaffold. BACKGROUND

[0002] The attached type scaffold is also called climbing frame, and can be divided into steel pipe climbing frame, full steel climbing frame and steel-aluminum combined climbing frame according to assembly materials. The attached type scaffold is a new type of scaffold system developed in recent years and is mainly applied to high-rise buildings. The attached type scaffold can climb up or down along the building, so that the scaffold technology is completely changed, on the one hand, the disassembly process of the scaffold is avoided, and on the other hand, the climbing frame is not limited by the height of the building, so that the manpower and materials are greatly saved. In addition, the climbing frame has great improvement in safety compared with the traditional scaffold.

[0003] The scaffold anti-falling device is an important part of the climbing frame, which connects the frame body and the building structure, bears the load of the frame body, and transmits the load to the building structure, so as to support the functions of anti-inclination, anti-falling, unloading and supporting structure.

[0004] The Chinese patent document CN215803100U discloses a new climbing frame anti-falling device and climbing frame, which discloses a top rod, a driving wheel and other structures in the device. However, the reliability of the mechanism is not high in actual use, and is greatly affected by assembly and vibration. Moreover, the structure needs to be welded, and has the problems of low assembly precision, large overall weight and laborious installation of workers. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a scaffold anti-falling device to prevent the climbing frame from falling accidentally, and to solve the technical problems of face welding, low installation precision and large self-weight.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the utility model is as follows:

[0007] A scaffold anti-falling device, characterized in that it comprises a star wheel, the star wheel is fixed on a scaffold wall-attached support through a plurality of anti-falling fixing shafts.

[0008] Further, the star wheel is provided with limiting teeth around and an anti-falling mechanism inside.

[0009] Further, the star wheel is provided with a first fixing disc and a second fixing disc on both sides, the star wheel rotates around the first fixing disc and the second fixing disc, and the anti-falling fixing shafts pass through the first fixing disc and the second fixing disc.

[0010] Further, the anti-falling mechanism comprises star wheel internal teeth arranged on the star wheel and an anti-falling block movably arranged in the star wheel, the star wheel internal teeth are structures with gradually changing height extending out of the surface of the star wheel, and the anti-falling block cooperates with the star wheel internal teeth.

[0011] Further, the star wheel is provided with a first trigger block in the star wheel through a torsion spring, one end of the first trigger block is connected with the anti-falling block, and the tail of the torsion spring is movably connected with the star wheel inner tooth.

[0012] Further, the first trigger block and the torsion spring are movably connected through a torsion spring pin, a second trigger block is further connected on the torsion spring pin, and the second trigger block is connected with the torsion spring.

[0013] Further, the first trigger block is two blocks arranged on the two sides of the second trigger block, and the end of the first trigger block is connected through a connecting pin, and one end of the second trigger block is movably connected on the connecting pin.

[0014] Further, the anti-falling fixing shafts are distributed on the two sides of the anti-falling block, and the anti-falling block is connected with the first fixing disc or the second fixing disc through a tension spring.

[0015] Further, the first fixing disc and the second fixing disc are provided with guide grooves, the anti-falling block is movably arranged in the guide grooves, a tension spring positioning rod is arranged between the first fixing disc and the second fixing disc, one end of the tension spring is connected on the tension spring positioning rod, and the other end is connected with the anti-falling block, and the tension spring positioning rod is located at the end of the guide groove.

[0016] Further, the anti-falling block is provided with a slot, and the tension spring is connected with an anti-falling block tension spring pin arranged in the slot.

[0017] The technical scheme of the utility model has the following advantages:

[0018] The anti-falling block in the star wheel can quickly respond, and the spring is used for quickly locking the star wheel when the accidental falling occurs, and the self-locking is completed. The limiting teeth on the star wheel can be toothed and the climbing frame is avoided from falling. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the anti-falling device of the utility model;

[0020] Figure 2 It is a structural schematic view of the star wheel of the utility model;

[0021] Figure 3 It is a structural schematic view of the anti-falling block of the utility model;

[0022] Figure 4 It is a structural schematic view of the fixing disc of the utility model;

[0023] Figure 5 It is an explosion view of the star wheel of the utility model;

[0024] Figure 6 It is a schematic view of the star wheel inner tooth of embodiment 2. DETAILED DESCRIPTION

[0025] In order to better understand the purpose, structure and function of the utility model, the utility model of a scaffold anti-falling device is further described in detail below in combination with the drawings.

[0026] Embodiment 1

[0027] As Figures 1-5 shown, the utility model of a scaffold anti-falling device comprises a star wheel 51, the star wheel 51 is fixed on the wall support of the scaffold through three anti-falling fixing shafts 52, the anti-falling device is a braking device when the frame body accidentally falls during lifting and use, and plays an important role in the safety of the scaffold.

[0028] Specifically, the star wheel 51 is provided with a limiting tooth 511 around, and an anti-falling mechanism is arranged inside, the limiting tooth 511 is connected with the guide rail on the scaffold in cooperation (the guide rail has a hole which cooperates with the limiting tooth 511) during work. When sudden falling occurs, the anti-falling mechanism locks the star wheel 51 to prevent it from rotating, thereby avoiding the falling of the scaffold.

[0029] Specifically, the star wheel 51 is a hollow ring, and the two sides are provided with a first fixing disc 54 and a second fixing disc 55, the anti-falling fixing shaft 52 passes through the first fixing disc 54 and the second fixing disc 55, the first fixing disc 54, the star wheel 51 and the second fixing disc 55 are fixed on the wall support of the scaffold, and it is ensured that the star wheel 51 can rotate on the first fixing disc 54 and the second fixing disc 55.

[0030] Specifically, in the technical scheme of the application, the anti-falling mechanism comprises a star wheel inner tooth 53 arranged on the star wheel 51, and an anti-falling block 57 movably arranged in the star wheel 51. The star wheel inner tooth 53 is a structure with gradually changing height extending out of the surface of the star wheel 51, and the anti-falling block 57 cooperates with the star wheel inner tooth 53.

[0031] Specifically, as Figure 2 shown, the shape of the star wheel inner tooth 53 is wedge-shaped. A first trigger block 58 is movably arranged in the star wheel 51 through a torsion spring 581, the tail of the torsion spring 581 is movably connected with the star wheel inner tooth 53, and one end of the first trigger block 58 is connected with the anti-falling block 57. When the star wheel inner tooth 53 rotates, the tail of the torsion spring 581 is pressed, the first trigger block 58 is driven to rotate and separated from the anti-falling block 57 in normal transmission, and the anti-falling block 57 is pushed to move and contact with the nearest star wheel inner tooth 53 in rapid reverse rotation, thereby preventing reverse rotation, achieving the purpose of braking and anti-falling when the external scaffold of the building accidentally falls.

[0032] The anti-falling fixing shaft 52 passes through the first fixing disc 54 and the second fixing disc 55, is distributed on both sides of the anti-falling block 57, and limits swing of the anti-falling block 57 while fixing the device. The anti-falling block 57 is connected with the first fixing disc 54 or the second fixing disc 55 through the tension spring 571, so that the anti-falling block 57 can rebound up and down, the anti-falling block 57 is pulled back to the position in the middle of the star wheel 51, and normal rotation of the star wheel 51 is ensured.

[0033] In the actual application process of the present application, in order to ensure stable operation of the device, the first trigger block 58 and the torsion spring 581 are movably connected through the torsion spring pin 582, the second trigger block 59 is further connected to the torsion spring pin 582, and the second trigger block 59 is connected with the torsion spring 581. The first trigger block 58 is provided with a connecting pin 583, one end of the second trigger block 59 is pressed on the connecting pin 583, when the star wheel internal tooth 53 reversely pushes, the second trigger block 59 can transmit force to the first trigger block 58 through the connecting pin 583, further press down the anti-falling block 57, and push the anti-falling block 57 to move. When the star wheel internal tooth 53 normally rotates and pushes the second trigger block 59, the second trigger block 59 is separated from the connecting pin 583, and the star wheel internal tooth 53 normally rotates.

[0034] In the actual application process of the present application, the first fixing disc 54 and the second fixing disc 55 are provided with guide grooves 56, the anti-falling block 57 is movably arranged in the guide grooves 56, the guide grooves 56 limit the movement direction of the anti-falling block 57, and can provide stronger lateral support for the anti-falling block 57 when falling, so that the mechanism is prevented from failing.

[0035] The first fixing disc 54 and the second fixing disc 55 are provided with a tension spring positioning rod 572, the middle part of the tension spring positioning rod 572 is provided with an annular groove, one end of the tension spring 571 is connected in the annular groove of the tension spring positioning rod 572, and the other end is connected with the middle part of the anti-falling block 57, so that the position of the tension spring 571 is in the middle position of the anti-falling block 57, the lateral moment is reduced, and the flexibility of the mechanism is ensured. The tension spring positioning rod 572 is located at the end of the guide groove 56.

[0036] Specifically, in the use process, the motion state of the scaffold is lifting, descending and sudden falling, and the running state of the anti-falling device is explained.

[0037] When the scaffold frame is lifted, the guide rail contacts the limiting teeth 511 on the fall arrestor, driving the star wheel 51 to rotate slowly. During the rotation, the inner teeth 53 of the star wheel contact the second trigger block 59. When the second trigger block 59 is forced to rotate around the torsion spring pin 582, the fall arrest block 57 retracts under the action of the tension spring 571, and the end of the fall arrest block 57 is separated from the inner teeth 53 of the star wheel, so that the star wheel 51 can rotate freely. When the star wheel 51 continues to rotate, the inner teeth 53 of the star wheel are separated from the second trigger block 59, and the second trigger block 59 returns to the original position under the action of the torsion spring 581 in the opposite direction. The first trigger block 58 is in a static state, and the star wheel 51 is in an unlocked state during this period, and the frame is normally lifted.

[0038] When the frame is lowered for operation, the fall arrest baffle of the guide rail drives the star wheel 51 to rotate in the opposite direction (counterclockwise) with the guide rail on the scaffold frame. Figure 3 The second trigger block 59 is forced to rotate around the torsion spring pin 582 by the extrusion of the star wheel fall arrest tooth 53, the second trigger block 59 pushes the connecting pin 583, and then the first trigger block 58 pushes the fall arrest block 57. The fall arrest block 57 slides forward in the guide groove 56 in the fixed disc 54 after being forced, and the fall arrest block 57 simultaneously stretches the tension spring 571, so that the end of the fall arrest block 57 slowly enters the area of the adjacent fall arrest tooth 53. The upper surface of the end of the fall arrest block 57 maintains a small gap with the fall arrest tooth 53, and when it continues to pass slowly, the second trigger block 59 is not in contact with the fall arrest tooth 53. The fall arrest block 57 is automatically pulled back to the original position by the tension spring 571. The fall arrest block 57 drives the fall arrest block 57 and the first trigger block 58 to return to the original position around the torsion spring pin 582 during the return of the fall arrest block 57.

[0039] When the frame suddenly falls during lifting, the fall arrest baffle on the guide rail drives the star wheel 51 to rotate rapidly in the opposite direction. The fall arrest tooth 53 drives the second trigger block 59 to rotate around the torsion spring pin 582, and the first trigger block 58 pushes the fall arrest block 57 to slide forward in the guide groove 56 in the fixed disc. The spring 571 is stretched. When the star wheel rotates rapidly, the inner teeth 53 of the star wheel quickly contact the end of the fall arrest block 57 before the rear spring 571 pulls the fall arrest block 57 due to inertia. The fall arrest block 57 is forced on the fixed disc, the star wheel 51 is in a locked state and stops rotating, and the frame stops falling, thereby preventing the frame from falling.

[0040] Embodiment 2

[0041] As shown in Figure 6 In this embodiment, the inner teeth 53 of the star wheel are arc-shaped inclined platforms.

[0042] Specifically, in the implementation process of the technical scheme of the present application, the inner teeth 53 of the star wheel can also be designed as a structure with a gradually increasing height from one side to the other side, and the highest part is a cross section that does not slide relative to the side surface of the fall arrest block 57 after contact.

[0043] Embodiment 3

[0044] As shown in Figure 4 and Figure 5 In this embodiment, the first trigger block 58 is two blocks arranged on both sides of the second trigger block 59, the ends of the first trigger block 58 are connected by a connecting pin 583, and one end of the second trigger block 59 is movably arranged above the connecting pin 583. The structure of the two second trigger blocks 59, the torsion spring 581 adopts several character structures, one end of the torsion spring 581 is buckled below the second trigger block 59, and the other end is arranged on the annular groove on both sides of the connecting pin 583, so that the connection of the torsion spring 581 is more stable.

[0045] Embodiment 4

[0046] As shown in Figure 4 In this embodiment, the anti-falling block 57 is provided with a slotted groove 575, and the slotted groove 575 is provided with an anti-falling block positioning pin 574, and such a structure can ensure good contact between the first trigger block 58 and the anti-falling block 57. The tension spring 571 is connected with the anti-falling block tension spring pin 573 arranged in the slotted groove 575.

[0047] It can be understood that the utility model is described through some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.

Claims

1. A fall arrestor for a scaffold, characterised in that, It comprises a star wheel (51) fixed on the scaffold wall support through several anti-falling fixing shafts (52); The star wheel (51) is provided with limiting teeth (511) around and an anti-falling mechanism inside; The fixing disc (55) rotates, and the anti-falling fixing shaft (52) passes through the first fixing disc (54) and the second fixing disc (55); The anti-falling mechanism comprises star wheel inner teeth (53) arranged on the star wheel (51) and an anti-falling block (57) movably arranged in the star wheel (51); the star wheel inner teeth (53) are of a structure with gradually changed height extending out of the surface of the star wheel (51), and the anti-falling block (57) cooperates with the star wheel inner teeth (53). The star wheel (51) is movably provided with a first trigger block (58) through a torsion spring (581), one end of the first trigger block (58) is connected with the anti-falling block (57), and the tail of the torsion spring (581) is movably connected with the star wheel inner teeth (53).

2. The fall arrestor of claim 1, wherein, The first trigger block (58) and the torsion spring (581) are movably connected through a torsion spring pin (582), and a second trigger block (59) is further connected on the torsion spring pin (582), and the second trigger block (59) is connected with the torsion spring (581).

3. The fall arrestor of claim 2, wherein, The first trigger block (58) is two blocks arranged on both sides of the second trigger block (59), and the end of the first trigger block (58) is connected through a connecting pin (583), and one end of the second trigger block (59) is movably connected on the connecting pin (583).

4. The fall arrestor of claim 3, wherein, The anti-falling fixing shaft (52) is distributed on both sides of the anti-falling block (57), and the anti-falling block (57) is connected with the first fixing disc (54) or the second fixing disc (55) through a tension spring (571).

5. The fall arrestor of claim 4, wherein, The first fixing disc (54) and the second fixing disc (55) are provided with a guide groove (56), the anti-falling block (57) is movably arranged in the guide groove (56), a tension spring positioning rod (572) is arranged between the first fixing disc (54) and the second fixing disc (55), one end of the tension spring (571) is connected on the tension spring positioning rod (572), and the other end is connected with the anti-falling block (57), and the tension spring positioning rod (572) is located at the end of the guide groove (56).

6. The fall arrestor of claim 5, wherein, The anti-falling block (57) is provided with a slot (575), and the tension spring (571) is connected with an anti-falling block tension spring pin (573) arranged in the slot (575).

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