Anti-falling device for construction hoist

Abstract

The utility model relates to the field of building construction technology discloses a kind of building construction hoist anti-falling devices, including mobile base, and the mobile base top is equipped with shear type lifting support, and the shear type lifting support top is equipped with lifting plate, and the shear type lifting support diagonal opposite corners are respectively equipped with protruding part one and protruding part two, and the shear type lifting support bottom and mobile base top are respectively equipped with a group of front-back symmetry guide rail, and protruding part one and protruding part two are respectively slidably connected with guide rail, and the other diagonal opposite corners of shear type lifting support are respectively hinged with mobile base and shear type lifting support, and the mobile base top is symmetrically equipped with the locking assembly connected with protruding part two, and the shear type lifting support top is equipped with horizontal moving platform, and the shear type lifting support outside is equipped with anti-falling mechanism;The utility model is through the double protection of rack gear engagement, bevel gear synchronous linkage and sensor trigger locking assembly, solves the transmission and anti-falling problem under the scene of heavy load and vibration, improves the reliability and security of protection.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a fall prevention device for a building construction hoist. Background Technology

[0002] Building materials need to be transported from low to high places using elevators. Existing scissor lifts use hydraulic cylinders to drive the scissor arms to extend and retract, which in turn raises and lowers the base plate to the target height for unloading.

[0003] Referring to the patent with publication number CN223033083U, the construction hoist anti-fall device disclosed therein achieves protection through anti-fall plates that are rotated around the base plate. Combined with a coiled spring mechanism and a stabilizing mechanism, the anti-fall plate's movement is guaranteed. The displacement transport seat plate facilitates material transfer and avoids construction workers from having to retrieve materials from heights.

[0004] However, the belt drive used in this device for the fall arrestor plate relies on friction. When transporting heavy materials or when the fall arrestor plate is thickened and reinforced, it is prone to slippage, jamming, and insufficient positioning accuracy. In addition, the belt drive torque is limited, making it difficult to quickly drive the heavy fall arrestor plate to lock or unfold. Vibration at the construction site can also easily cause the belt to loosen and skip teeth, affecting the reliability of protection and failing to meet the safety requirements of heavy-load scenarios. Utility Model Content

[0005] Given that the existing anti-fall devices for construction hoists rely on friction for belt drive, which suffers from problems such as slippage and jamming under heavy loads, insufficient positioning accuracy, limited torque making it difficult to quickly lock or deploy heavy anti-fall plates, and loosening and skipping teeth due to vibrations at the construction site, resulting in insufficient protection reliability, this utility model is proposed.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a fall prevention device for a construction hoist, comprising a movable base, a scissor lift bracket above the movable base, a lifting plate above the scissor lift bracket, a protrusion 1 and a protrusion 2 at diagonal angles of the scissor lift bracket, a set of symmetrical guide rails at the bottom of the scissor lift bracket and the top of the movable base, the protrusion 1 and the protrusion 2 being slidably connected to the guide rails, and the two ends of the scissor lift bracket at another diagonal angle being hinged to the movable base and the scissor lift bracket, a locking assembly symmetrically connected to the protrusion 2 being provided at the top of the movable base, a transverse moving platform being provided at the top of the scissor lift bracket, and a fall prevention mechanism being provided on the outside of the scissor lift bracket; The fall protection mechanism includes a fall protection plate one, which is symmetrically arranged on the outside of the scissor lift support. A fall protection plate two is symmetrically arranged on the outside of the scissor lift support between the fall protection plates one and the fall protection plate two. The fall protection plate one is hinged to the scissor lift support through a connecting block one, and the fall protection plate two is hinged to the scissor lift support through a connecting block two.

[0007] As a preferred embodiment, the fall protection mechanism further includes a rack, which is located on one side below the scissor lift support. The lower end of the fall protection plate one near the rack is provided with several teeth that mesh with the rack. A screw is rotatably mounted on one side of the bottom of the scissor lift support. A slider is threadedly connected to the outer wall of the screw, and the upper end of the slider is fixedly connected to the rack. The end of the screw away from the slider is connected to a motor through a transmission assembly. The motor is connected to the bottom of the lift plate through an adjustment assembly. The two ends of the fall protection plate one and the fall protection plate two are respectively provided with bevel gear one and bevel gear two, and adjacent bevel gear one and bevel gear two mesh with each other.

[0008] As a preferred embodiment, the transmission assembly includes a docking seat, which is fixedly connected to one end of the screw away from the slider. The slider has a docking groove on one side, and a docking block is provided in the docking groove. The docking block is fixedly connected to the output end of the motor, and the docking block is cross-shaped.

[0009] As a preferred embodiment, the adjustment assembly includes an adjustment frame, which is fixedly installed at the bottom of the lifting plate. A second screw is rotatably installed inside the adjustment frame, and a second slider is threadedly connected to the outer wall of the second screw. A fixed frame is connected to the lower end of the second slider outside the adjustment frame, and the fixed frame is fixedly sleeved on the outside of the motor. One end of the second screw extends outside the adjustment frame.

[0010] As a preferred embodiment, the bottom of the connecting block one and the connecting block two are respectively fixedly connected to the support plate, and the top surface of the support plate is tangent to the bottom surface of the fall arrestor plate one and the fall arrestor plate two. The lower ends of the fall arrestor plate one and the fall arrestor plate two are both semi-circular arc surfaces.

[0011] As a preferred embodiment, the locking assembly includes a mounting bracket, which is disposed on the outer side of the guide rail disposed on the top of the movable base, and the mounting bracket is fixedly connected to one end of the protrusion. The top of the mounting bracket is provided with a telescopic rod, and the telescopic end of the telescopic rod is connected to a meshing block on the inner side of the mounting bracket. The top of the movable base is provided with a rack that matches the meshing block, and a sensor is provided on one side of the top of the movable base.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model adopts a rack and pinion meshing transmission structure to replace the traditional belt pulley transmission, which significantly improves the transmission torque, strengthens the rigidity and eliminates the risk of slippage. It can stably drive the thickened fall arrestor plate one and fall arrestor plate two to quickly unfold, lock or reset, effectively solving the problems of fall arrestor plate drive jamming and insufficient positioning accuracy in heavy load scenarios, and is suitable for the safety protection needs of heavy material transportation.

[0013] 2. This utility model utilizes a drive mechanism consisting of a motor, a screw, and a slider, combined with the meshing transmission of bevel gears one and two to achieve synchronous linkage between the fall arrestor plate one and the fall arrestor plate two. The gear meshing structure has strong anti-vibration interference capability, avoiding the problems of loose transmission components and skipped teeth caused by vibrations at the construction site, and significantly improving the protective reliability of the fall arrestor mechanism.

[0014] 3. This utility model forms a double protection through a locking assembly consisting of a sensor, a telescopic rod, a meshing block, and a rack. The sensor can quickly detect the falling state of the lifting plate and trigger the locking. In conjunction with the gear and rack drive structure of the anti-fall mechanism, it not only solves the problem of insufficient reliability of traditional transmission protection, but also further improves the response time and safety of the device in preventing falls, and is fully adaptable to the complex working conditions of heavy load and vibration in building construction. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a bottom view of the lifting plate structure of this utility model; Figure 3 This is a schematic diagram of the structure between the screw and the motor of this utility model; Figure 4 This is a schematic diagram of the structure of the lateral moving platform of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Movable base; 2. Scissor-type lifting bracket; 3. Lifting plate; 4. Guide rail; 5. Protrusion 1; 6. Protrusion 2; 7. Fall protection plate 1; 8. Fall protection plate 2; 9. Connecting block 1; 10. Connecting block 2; 11. Support plate; 12. Gear; 13. Rack 1; 14. Bevel gear 1; 15. Bevel gear 2; 16. Screw 1; 17. Slider 1; 18. Connecting seat; 19. Motor 1; 20. Connecting block; 21. Adjusting frame; 22. Screw 2; 23. Slider 2; 24. Fixing frame; 25. Lateral moving platform; 26. Mounting bracket; 27. Telescopic rod; 28. Meshing block; 29. ​​Rack 2; 30. Sensor. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] Reference Figure 1 - Figure 4As shown, a fall protection device for a construction hoist is provided, including a movable base 1, a scissor lift bracket 2 above the movable base 1, and a lifting plate 3 above the scissor lift bracket 2. The scissor lift bracket 2 has a protrusion 5 and a protrusion 6 at opposite corners. In this example, the scissor lift bracket 2 is driven by a hydraulic cylinder, causing the scissor lift bracket 2 to move the lifting plate 3 up and down. This is prior art and therefore will not be described in detail. A set of symmetrical guide rails 4 are provided at the bottom of the scissor lift bracket 2 and the top of the movable base 1, respectively. The protrusions 5 and 6 are slidably connected to the guide rails 4, and the other protrusion of the scissor lift bracket 2... The two diagonally opposite ends are respectively hinged to the movable base 1 and the scissor lift bracket 2. The top of the movable base 1 is symmetrically provided with locking components connected to the second protrusion 6. The top of the scissor lift bracket 2 is provided with a horizontal moving platform 25. In this example, the horizontal moving platform 25 includes a moving platform, a motor, a threaded rod, a threaded sleeve, a moving wheel, a slide block and a slide rail, so that the moving platform can move horizontally. The outside of the scissor lift bracket 2 is provided with a fall protection mechanism. Through the sliding cooperation and hinge structure between the guide rail 4 and the first protrusion 5 and the second protrusion 6, the scissor lift bracket 2 is ensured to rise and fall smoothly. The locking components and the fall protection mechanism form multiple safety guarantees and improve the overall structural stability. The fall protection mechanism includes a fall protection plate 7, which is symmetrically arranged on the outside of the scissor lift bracket 2. A fall protection plate 8 is symmetrically arranged on the outside of the scissor lift bracket 2 between the fall protection plates 7 and the fall protection plate 1. The fall protection plate 7 is hinged to the scissor lift bracket 2 via a connecting block 19, and the fall protection plate 8 is hinged to the scissor lift bracket 2 via a connecting block 210. The fall protection plates 7 and 8 can rotate flexibly through the hinge structure, realizing the switching between the protective state and the storage state, taking into account both the protective effect and the ease of operation.

[0019] In this example, the fall protection mechanism also includes a rack 13, which is located on one side below the scissor lift bracket 2. The lower end of the fall protection plate 7, near the rack 13, has several teeth 12 that mesh with the rack 13. A screw 16 is rotatably mounted on one side of the bottom of the scissor lift bracket 2. A slider 17 is threaded onto the outer wall of the screw 16, and the upper end of the slider 17 is fixedly connected to the rack 13. The end of the screw 16 away from the slider 17 is connected to a motor 19 via a transmission assembly. The motor 19... The adjustment assembly is connected to the bottom of the lifting plate 3. The ends of the fall arrestor plate 1 7 and fall arrestor plate 2 8 are respectively equipped with bevel gear 14 and bevel gear 2 15, and adjacent bevel gear 14 and bevel gear 2 15 mesh with each other. The rack and pinion 13 and the tooth 12 mesh with each other to replace the traditional belt pulley transmission. With the linkage of motor 19, screw 16 and bevel gear 14 and bevel gear 2 15, the transmission torque is large and the rigidity is strong. It can stably drive the fall arrestor plate 1 7 and fall arrestor plate 2 8 to move synchronously, and solve the problem of drive jamming in heavy load scenarios.

[0020] In this example, the transmission assembly includes a docking seat 18, which is fixedly connected to the end of the screw 16 away from the slider 17. A docking groove is provided on one side of the slider 17, and a docking block 20 is provided in the docking groove. The docking block 20 is fixedly connected to the output end of the motor 19, and the docking block 20 is cross-shaped. The cooperation between the cross-shaped docking block 20 and the docking seat 18 ensures stable transmission, facilitates quick separation, reserves space for manual operation, and improves the adaptability of the mechanism.

[0021] In this example, the adjustment assembly includes an adjustment frame 21, which is fixedly installed at the bottom of the lifting plate 3. A screw 22 is rotatably installed inside the adjustment frame 21. A slider 23 is threadedly connected to the outer wall of the screw 22. A fixed frame 24 is connected to the lower end of the slider 23 outside the adjustment frame 21. The fixed frame 24 is fixedly sleeved on the outside of the motor 19. One end of the screw 22 extends outside the adjustment frame 21. Through the adjustment assembly composed of the screw 22 and the slider 23, the position of the motor 19 can be flexibly adjusted to achieve precise docking or separation of the docking block 20 and the docking seat 18, ensuring smooth switching between motor drive and manual operation.

[0022] In this example, support plates 11 are fixedly connected to the bottom of connecting block 9 and connecting block 10 respectively, and the top surface of support plate 11 is tangent to the bottom surface of fall arrestor 7 and fall arrestor 8. The lower ends of fall arrestor 7 and fall arrestor 8 are both semi-circular arc surfaces. Support plate 11 provides stable support for fall arrestor 7 and fall arrestor 8. With the semi-circular arc surface design, frictional resistance during rotation is reduced, and the smoothness of fall arrestor movement is improved.

[0023] In this example, the locking assembly includes a mounting bracket 26, which is located on the outer side of the guide rail 4 on the top of the movable base 1. The mounting bracket 26 is fixedly connected to one end of the protrusion 6. A telescopic rod 27 is provided on the top of the mounting bracket 26. The telescopic end of the telescopic rod 27 is connected to a meshing block 28 on the inner side of the mounting bracket 26. A rack 29 adapted to the meshing block 28 is provided on the top of the movable base 1. A sensor 30 is provided on one side of the top of the movable base 1. In this example, the sensor 30 can be a displacement sensor or a speed sensor. This example uses a displacement sensor to detect the displacement of the lifting plate 3. When it detects that the displacement exceeds the set value within a fixed time range, it will transmit a signal to trigger the mechanism, thereby determining that the lifting plate 3 is falling. The telescopic rod 27 can then be activated by the device controller. The sensor 30 can quickly detect the falling state. Together with the telescopic rod 27, the meshing block 28 and the rack 29, it forms an instant-response anti-fall protection, which, together with the anti-fall mechanism, improves the overall safety level.

[0024] During use, Lifting base operation: The movable base 1 provides support for the whole, and the scissor lifting bracket 2 slides along the guide rail 4 through the diagonally opposite protrusions 5 and 6, and cooperates with the other diagonally opposite hinge structure to realize the smooth lifting of the lifting plate 3. The horizontal moving platform 25 can assist in the transfer of materials.

[0025] Fall arrestor linkage control: Motor 19 drives screw 16 to rotate through the docking seat 18 of the transmission assembly and the cross-shaped docking block 20, causing slider 17 to drive rack 13 to translate. Rack 13 meshes with the teeth 12 of fall arrestor 7, causing fall arrestor 7 to rotate around connecting block 9. At the same time, bevel gears 14 at both ends of fall arrestor 7 mesh with bevel gears 15 of fall arrestor 8, driving fall arrestor 8 to rotate synchronously around connecting block 10, realizing the unfolding protection or folding storage of fall arrestor. Support plate 11 plays a supporting and guiding role for the rotating fall arrestor.

[0026] Emergency and Redundancy Protection: If motor 19 fails, the screw 22 of the adjusting component rotates to move the slider 23, causing the fixed frame 24 to move the motor 19 horizontally, separating the docking block 20 from the docking seat 18. The screw 16 can be manually rotated to operate the anti-fall plate. When the sensor 30 detects the falling of the lifting plate 3, the telescopic rod 27 of the locking component pushes the meshing block 28 to mesh with the rack 29, locking the protrusion 26 through the mounting bracket 26, preventing the scissor lifting bracket 2 from falling uncontrollably, forming a double anti-fall protection.

[0027] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fall protection device for a construction hoist, comprising a movable base (1), characterized in that: The mobile base (1) is provided with a scissor lift bracket (2) above it, and a lifting plate (3) is provided above the scissor lift bracket (2). The scissor lift bracket (2) is provided with a protrusion 1 (5) and a protrusion 2 (6) at diagonal angles. The bottom of the scissor lift bracket (2) and the top of the mobile base (1) are provided with a set of front and rear symmetrical guide rails (4). The protrusion 1 (5) and the protrusion 2 (6) are slidably connected to the guide rails (4). The two ends of the scissor lift bracket (2) at the other diagonal angle are hinged to the mobile base (1) and the scissor lift bracket (2) respectively. The top of the mobile base (1) is provided with a locking component connected to the protrusion 2 (6). The top of the scissor lift bracket (2) is provided with a horizontal moving platform (25). The outside of the scissor lift bracket (2) is provided with an anti-fall mechanism. The fall protection mechanism includes a fall protection plate one (7), and the fall protection plate one (7) is symmetrically arranged on the outside of the scissor lift bracket (2). The fall protection plate two (8) is symmetrically arranged on the outside of the scissor lift bracket (2) between the fall protection plate one (7). The fall protection plate one (7) is hinged to the scissor lift bracket (2) through a connecting block one (9), and the fall protection plate two (8) is hinged to the scissor lift bracket (2) through a connecting block two (10).

2. The anti-fall device for a construction hoist according to claim 1, characterized in that: The fall protection mechanism also includes a rack (13), which is located on one side below the scissor lift bracket (2). The lower end of the fall protection plate (7) near the rack (13) is provided with a number of teeth (12) that mesh with the rack (13). A screw (16) is rotatably installed on one side of the bottom of the scissor lift bracket (2). A slider (17) is threadedly connected to the outer wall of the screw (16), and the upper end of the slider (17) is fixedly connected to the rack (13). The end of the screw (16) away from the slider (17) is connected to a motor (19) through a transmission assembly. The motor (19) is connected to the bottom of the lift plate (3) through an adjustment assembly. The ends of the fall protection plate (7) and the fall protection plate (8) are respectively provided with bevel gear (14) and bevel gear (15), and adjacent bevel gears (14) and bevel gears (15) mesh with each other.

3. The anti-fall device for a construction hoist according to claim 2, characterized in that: The transmission assembly includes a docking seat (18), which is fixedly connected to the end of the screw (16) away from the slider (17). A docking groove is provided on one side of the slider (17), and a docking block (20) is provided in the docking groove. The docking block (20) is fixedly connected to the output end of the motor (19), and the docking block (20) is cross-shaped.

4. The anti-fall device for a construction hoist according to claim 2, characterized in that: The adjustment assembly includes an adjustment frame (21), which is fixedly installed at the bottom of the lifting plate (3). A screw (22) is rotatably installed inside the adjustment frame (21). A slider (23) is threadedly connected to the outer wall of the screw (22). A fixed frame (24) is connected to the lower end of the slider (23) outside the adjustment frame (21). The fixed frame (24) is fixedly sleeved on the outside of the motor (19). One end of the screw (22) extends to the outside of the adjustment frame (21).

5. A fall prevention device for a construction hoist according to claim 2, characterized in that: The bottom of the first connecting block (9) and the second connecting block (10) are respectively fixedly connected to the support plate (11), and the top surface of the support plate (11) is tangent to the bottom surface of the first falling plate (7) and the second falling plate (8). The lower ends of the first falling plate (7) and the second falling plate (8) are both semi-circular arc surfaces.

6. The anti-fall device for a construction hoist according to claim 2, characterized in that: The locking assembly includes a mounting bracket (26), which is located on the opposite side of the guide rail (4) on the top of the movable base (1), and the mounting bracket (26) is fixedly connected to one end of the protrusion (6). The top of the mounting bracket (26) is provided with a telescopic rod (27), and the telescopic end of the telescopic rod (27) is connected to a meshing block (28) on the inner side of the mounting bracket (26). The top of the movable base (1) is provided with a rack (29) that is adapted to the meshing block (28), and a sensor (30) is provided on one side of the top of the movable base (1).

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