An extendable unloading platform

Abstract

This invention relates to a telescopic unloading platform. A dedicated power mechanism is installed on both sides of the fixed frame, which automatically drives the movable frame to extend and retract, replacing the traditional manual pushing and pulling method. This effectively reduces labor intensity, precisely controls the extension and retraction stroke, improves operational accuracy and construction efficiency, and meets standardized construction requirements. The equipment is equipped with a dedicated fall protection system consisting of a support frame, reel, fall protection traction rope, and support guide wheel. The traction rope is guided and connected to the front end of the movable frame, forming a continuous traction constraint. This equipment adopts a linkage structure, where the power mechanism synchronously drives the reel to rotate and the frame to extend and retract. The platform extends and retracts simultaneously, ensuring the traction rope always maintains an adaptive tension, preventing slackness and tangling, achieving dynamic real-time fall protection. This solves the shortcomings of traditional unloading platforms, such as lack of protection and poor stability, effectively eliminating the risk of falls and overturning from heights, and significantly improving equipment operational stability and construction safety.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a telescopic unloading platform. Background Technology

[0002] Unloading platforms are core temporary cantilever construction equipment used in the construction of high-rise building main structures, exterior wall decoration, and material handling operations. They are mainly used for material transportation between building floors and the removal of construction waste, and are an indispensable key facility for high-altitude construction. Currently, conventional telescopic unloading platforms on the market mainly consist of a fixed frame and a push-pull movable load-bearing frame. The extension and retraction of the platform are achieved by manual pushing and pulling or a simple external drive to meet the unloading construction needs of different cantilever distances. Compared with traditional fixed unloading platforms, they have a certain degree of flexibility and adaptability and are widely used in various construction sites.

[0003] However, the existing traditional telescopic unloading platform structure design has inherent flaws. The vast majority of equipment is not equipped with a dedicated integrated power telescopic mechanism, nor is it equipped with a dedicated fall protection mechanism, resulting in extremely low overall operational safety and automation. In actual construction, platform extension and retraction mostly rely on manual pushing and pulling operations, which is not only labor-intensive and has poor telescopic accuracy, but also prone to problems such as deviation, jamming, and shaking during the platform's extension and retraction, resulting in extremely poor operational stability and seriously affecting the construction efficiency of material loading and unloading.

[0004] More importantly, the existing unloading platform lacks a dedicated anti-fall structure. When the platform is carrying heavy materials, encounters vibrations from high-altitude construction, strong wind disturbances, or when the sliding connection structure is worn, loose, or malfunctions, the movable frame is very prone to major safety accidents such as tilting, slipping, and falling. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes an unloading platform that can realize automatic extension and retraction of the movable frame and has reliable anti-fall function.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A telescopic unloading platform includes a fixed frame, a column support assembly mounted on the fixed frame, and a movable frame that slides back and forth at the front end of the fixed frame. A loading platform is mounted on the movable frame. Support frames are mounted on both the left and right sides of the fixed frame. A reel is rotatably mounted on the support frames, and a fall arresting traction rope is wound around the reel. A support guide wheel is mounted on the column support assembly. One end of the fall arresting traction rope is fixedly connected to the reel, and the other end passes around the support guide wheel and is connected to the front end of the movable frame. A power mechanism is mounted on both the left and right sides of the fixed frame. The power mechanism is used to simultaneously drive the reel to rotate and drive the movable frame to slide. When the movable frame extends forward and slides, the reel releases the fall arresting traction rope, and when the movable frame retracts backward and slides, the reel winds the fall arresting traction rope.

[0008] In some embodiments, the power mechanism includes a drive motor mounted on the fixed frame, a worm gear mounted on the output shaft of the drive motor, a rotating shaft mounted on the support frame, a reel mounted on the rotating shaft, a worm wheel and a gear mounted on the rotating shaft, the worm wheel meshing with the worm gear, and a rack meshing with the gear mounted on the movable frame.

[0009] In some embodiments, the column support assembly is further provided with a tension adjustment mechanism for adjusting the tension of the fall arresting traction rope.

[0010] In some embodiments, the tension adjustment mechanism includes an upper adjustment seat and a lower adjustment seat spaced apart on the column support assembly. A telescopic seat is movably extended and retractable at the front end of the upper adjustment seat. An adjusting guide wheel is provided on the telescopic seat. A spring is connected between the upper adjustment seat and the telescopic seat. A fixed guide wheel is provided on the lower adjustment seat. The fall arresting traction rope is sequentially wound around the fixed guide wheel and the adjusting guide wheel.

[0011] In some embodiments, a first sliding groove is provided on both the left and right inner sides of the fixed frame, and a second sliding groove is provided on both the left and right outer sides of the movable frame. A first roller is provided at the rear end of both the left and right sides of the fixed frame, and a second roller is provided at the front end of both the left and right sides of the movable frame. The movable frame is slidably disposed between the two first sliding grooves, and the second roller is slidably disposed within the first sliding groove and the second roller is slidably disposed within the second sliding groove.

[0012] In some embodiments, the column support assembly includes four columns disposed on the fixed frame. The lower end of each column is fixedly connected to the fixed frame, and the upper end of each column is threadedly connected to an adjusting screw. The upper end of the adjusting screw is provided with a top support plate, and a reinforcing frame is connected to the upper end of the four columns.

[0013] In some embodiments, guardrails are provided on both the left and right sides of the movable frame. The lower end of the guardrail is hinged to the movable frame via a hinge. A limit frame is also provided on the movable frame. A support rod is detachably installed between the limit frame and the guardrail via screws. The limit frame is located on the front side of the movable frame and can abut against the fixed frame, thereby limiting the movable frame from sliding excessively inward. A protective door is hinged to the front side of both guardrails.

[0014] In some embodiments, connecting beams extending in the front-to-back direction are also provided on the column support assembly at left and right intervals, and guide members are provided on the connecting beams, with the upper end of the guardrail sliding on the guide members.

[0015] In some embodiments, locking pins are movably provided on both the left and right sides of the front end of the movable frame, and locking holes for inserting the locking pins are provided at intervals on both the left and right inner sidewalls of the fixed frame.

[0016] In some embodiments, a ramp is provided on the rear side of the loading platform.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This device is equipped with dedicated power mechanisms on both sides of the unloading platform, which can autonomously drive the movable frame to slide and extend back and forth, completely replacing the traditional manual pushing and pulling operation method; effectively reducing the labor intensity of construction personnel, avoiding operational risks such as pinching injury and high-altitude imbalance that are easy to occur during manual pushing and pulling, and precisely controlling the extension and retraction stroke of the platform to ensure that each extension and retraction action is smooth and regular, greatly improving the operation accuracy and construction efficiency of the unloading platform, and adapting to the needs of standardized and regulated construction.

[0019] 2. By setting up a dedicated fall protection system consisting of a support frame, reel, fall protection traction rope, and support guide wheel, the telescopic unloading platform is provided with all-round fall protection. Unlike the traditional unprotected bare structure, this device uses the fall protection traction rope to form a continuous traction constraint on the front end of the movable frame, which solves the safety problems of traditional platform sliding structure failure, heavy load imbalance, and falling, overturning, and tilting caused by external disturbances. It eliminates major safety accidents in high-altitude unloading operations from the structural level.

[0020] 3. This device uses a single power mechanism to synchronously drive the reel to rotate and the movable frame to slide, forming a linkage logic: when the platform extends, the reel simultaneously releases the rope; when the platform retracts, the reel simultaneously retracts the rope, ensuring that the fall arrest traction rope always maintains an adaptive tension. This avoids problems such as rope slack, accumulation, pulling, and tangling, allowing the fall arrest structure to adapt to the platform's extension and retraction conditions throughout the entire process, achieving dynamic and real-time protection. This solves the shortcomings of traditional equipment that lacks dynamic protection and whose protection is disconnected from the working conditions, significantly improving the equipment's operational stability and protection reliability. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the movable frame of the present invention when it is extended.

[0022] Figure 2 This is a side view of the movable frame of the present invention when it is extended.

[0023] Figure 3 This is a three-dimensional schematic diagram of the retractable frame of the present invention.

[0024] Figure 4 This is a side view of the active frame of the present invention when it retracts.

[0025] Figure 5 For the present invention Figure 4 Enlarged diagram of point A.

[0026] Figure 6 This is a schematic diagram of the fixed frame and the movable frame of the present invention when they are separated.

[0027] Figure 7 For the present invention Figure 6 Enlarged diagram of point B.

[0028] Figure 8 This is a schematic diagram of the protective door of the present invention when it is opened.

[0029] Figure 9 This is a schematic diagram of the protective door and guardrail of the present invention when they are stored together.

[0030] Figure 10 This is a schematic diagram of the electric control component and the fall arrestor component after disassembly. Detailed Implementation

[0031] The following detailed description provides various embodiments or examples for carrying out the present invention. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of the invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0032] like Figures 1-9The telescopic unloading platform shown includes a fixed frame 1, a column support assembly mounted on the fixed frame 1, and a movable frame 2 that slides back and forth at the front end of the fixed frame 1. A loading platform 3 is mounted on the movable frame 2. Support frames 7 are mounted on both the left and right sides of the fixed frame 1. A reel 4 is rotatably mounted on the support frame 7. A fall arresting traction rope 5 is wound around the reel 4. A support guide wheel 6 is mounted on the column support assembly. One end of the fall arresting traction rope 5 is fixedly connected to the reel 4, and the other end passes around the support guide wheel 6 and is connected to the front end of the movable frame 2. A power mechanism is mounted on both the left and right sides of the fixed frame 1. The power mechanism is used to simultaneously drive the reel 4 to rotate and drive the movable frame 2 to slide. When the movable frame 2 extends forward and slides, the reel 4 releases the fall arresting traction rope 5, and when the movable frame 2 retracts backward and slides, the reel 4 winds the fall arresting traction rope 5.

[0033] According to the above structure, during operation of this telescopic unloading platform, the fixed frame 1 is fixedly installed at the bottom of the floor, serving as the lower installation base for the equipment. The column support assembly is fixedly supported at the top of the floor, providing vertical support and positioning for the entire equipment, thus achieving stable installation of the equipment. The movable frame 2 can slide back and forth relative to the front end of the fixed frame 1, and the loading platform 3 mounted on the movable frame 2 completes the loading and unloading of construction materials.

[0034] Support frames 7 are mounted on both the left and right sides of the fixed frame 1. The reel 4 is rotatably mounted on the support frame 7, allowing the reel 4 to stably rotate and retract. The fall arresting traction rope 5 is wound around the reel 4. A support guide wheel 6 is mounted on the column support assembly. One end of the fall arresting traction rope 5 is fixedly connected to the reel 4, and the other end passes around the support guide wheel 6 and is fixedly connected to the front end of the movable frame 2. The support guide wheel 6 can guide, limit, and redirect the fall arresting traction rope 5, ensuring that the transmission trajectory of the fall arresting traction rope 5 is regular and the force is even, avoiding rope deviation and friction wear.

[0035] The power mechanisms located on the left and right sides of the fixed frame 1 are the core driving components of this equipment. They can output power synchronously to drive the reel 4 to rotate and the movable frame 2 to slide back and forth, achieving precise linkage between the equipment's extension and retraction and the anti-fall rope's release and retraction. The specific working process is as follows: When the equipment needs to extend outward for unloading operations, the power mechanism drives the movable frame 2 to extend forward and slide, simultaneously driving the reel 4 to rotate, so that the reel 4 smoothly releases the wound anti-fall traction rope 5. The anti-fall traction rope 5 extends synchronously with the extension stroke of the movable frame 2, always conforming to the equipment's operating conditions; when the unloading operation is completed and the equipment needs to be reset and stored, the power mechanism drives the movable frame 2 to retract backward and slide, simultaneously driving the reel 4 to rotate in the opposite direction, synchronously winding and rewinding the anti-fall traction rope 5.

[0036] The entire process is driven by the linkage of the power mechanism, so that the anti-fall traction rope 5 adapts to the extension and retraction of the movable frame 2 and always maintains tension. Without affecting the normal extension and retraction unloading operation of the platform, it continuously forms a traction constraint limit on the front end of the movable frame 2, effectively limiting the swaying, deviation and falling tendency of the movable frame 2, realizing dynamic anti-fall protection, and ensuring the stability and operational safety of the telescopic unloading platform throughout the entire operation.

[0037] In this invention, the drive motor 21 of the power mechanism is fixedly mounted on the fixed frame 1, serving as the sole power output source for the entire linkage structure. A worm gear 22 is mounted on the output shaft of the drive motor 21, and the worm gear 22 can rotate synchronously with the drive motor 21. A rotating shaft 23 is rotatably mounted on the support frame 7, and a reel 4 is fixedly mounted on the rotating shaft 23, rotating synchronously with the rotating shaft 23 to realize the winding and unwinding of the fall arrestor traction rope 5.

[0038] A worm gear 24 and a gear 25 are synchronously fixedly mounted on the rotating shaft 23. The worm gear 24 meshes with the worm 22 for transmission, and the worm gear structure has an inherent self-locking function, which can lock the transmission when the drive motor 21 stops working, effectively locking the rotational freedom of the rotating shaft 23 and preventing the platform from slipping on its own or the reel 4 from slackening due to external vibration or load. When the drive motor 21 is working, it drives the worm gear 24 to rotate through the worm 22, thereby driving the rotating shaft 23 to rotate as a whole, realizing the synchronous rotation of the reel 4. A rack 26 is fixedly installed on the movable frame 2, and the rack 26 meshes with the gear 25. When the rotating shaft 23 rotates, it drives the gear 25 to rotate synchronously. Through the meshing transmission of the gear 25 and the rack 26, the movable frame 2 is driven to slide back and forth relative to the fixed frame 1.

[0039] The entire transmission process achieves integrated linkage: when the drive motor 21 rotates forward and reverses, it can simultaneously complete the two actions of rotating the reel 4 and extending / retracting the movable frame 2. When the drive motor 21 rotates forward, it drives the rotating shaft 23 to rotate through the worm gear 22 and worm wheel 24. On the one hand, this causes the reel 4 to rotate to release or retract the fall arresting traction rope 5. On the other hand, through the meshing transmission of the gear 25 and rack 26, it drives the movable frame 2 to extend forward or retract backward, ensuring that the extension and retraction stroke of the movable frame 2 is perfectly matched with the extension and retraction length of the fall arresting traction rope 5. This achieves synchronous linkage between the extension and retraction action and the dynamic tension of the fall arresting rope, ensuring smooth operation of the platform and real-time effective fall protection.

[0040] The column support assembly of this telescopic unloading platform is equipped with a tension adjustment mechanism, which is mainly used to adaptively adjust the tension of the fall arresting traction rope 5. It can compensate for the slack of the fall arresting traction rope 5 in real time, ensuring that the fall arresting traction rope 5 remains taut throughout the process, avoiding fall arresting failure due to rope slack, wear, or tensile deformation, and ensuring the stability and reliability of the platform's fall arresting protection.

[0041] The tension adjustment mechanism mainly consists of an upper adjustment seat 41 and a lower adjustment seat 42, which are installed at intervals on the column support assembly, forming an integral mounting base to achieve fixed positioning of the overall structure. A telescopic seat 43 is movably and telescopically mounted at the front end of the upper adjustment seat 41. The telescopic seat 43 can extend and retract relative to the upper adjustment seat 41, and an adjustment guide wheel 44 is fixedly mounted on the telescopic seat 43. A spring connects the upper adjustment seat 41 and the telescopic seat 43, and the spring continuously applies an elastic pushing force to the telescopic seat 43, providing an elastic power source for adaptive tension adjustment.

[0042] A fixed guide wheel 46 is fixedly mounted on the lower adjusting seat 42. The fall arresting traction rope 5 is sequentially wound around the fixed guide wheel 46 and the adjusting guide wheel 44. The rope is guided, limited, and its tension is adjusted through the cooperation of the two sets of guide wheels. The fixed guide wheel 46 serves as a low-position fixed guide, limiting the trajectory of the fall arresting traction rope 5. The adjusting guide wheel 44 is position-adjustable by the telescopic displacement of the telescopic seat 43, thereby changing the tension of the fall arresting traction rope 5.

[0043] During normal operation of the equipment, when the fall arresting traction rope 5 experiences slight slack, tensile deformation, or a decrease in tension due to vibration, the spring between the upper adjusting seat 41 and the telescopic seat 43 continuously releases elastic thrust, pushing the telescopic seat 43 forward and causing the adjusting guide wheel 44 to move forward, thus stretching and tightening the slack fall arresting traction rope 5 and compensating for any slack in the rope in real time. When the fall arresting traction rope 5 retracts and becomes too taut, it can push the adjusting guide wheel 44 and the telescopic seat 43 in the opposite direction to compress the spring, achieving elastic buffering and avoidance.

[0044] This structure enables full-process adaptive dynamic tensioning and buffering adjustment of the fall arresting traction rope 5, ensuring that the fall arresting traction rope 5 is never slack, never piled up, and never shakes. It perfectly matches the rope's extension and retraction conditions during the platform's telescopic process, effectively solving the problems of slackness, cable deviation, and unstable tension in the fall arresting traction rope 5 after long-term use, and continuously ensuring the protective accuracy and operational safety of the fall arresting mechanism.

[0045] This telescopic unloading platform uses a sliding guide mechanism composed of multiple sets of sliding grooves and rollers to achieve smooth telescopic sliding of the movable frame 2 relative to the fixed frame 1, effectively reducing sliding friction resistance. At the same time, it limits the movable frame 2 in multiple directions to avoid deviation, jamming and shaking during telescopic operation, ensuring the smooth operation of the platform and the overall structural stability.

[0046] The fixed frame 1 has first sliding grooves 51 on both inner sides, serving as outer guide tracks for the telescopic sliding of the movable frame 2. The movable frame 2 has second sliding grooves 52 on both outer sides, forming a double-layer sliding limiting structure in conjunction with the first sliding grooves 51. The rear ends of the left and right sides of the fixed frame 1 are equipped with first rollers 53, and the front ends of the left and right sides of the movable frame 2 are equipped with second rollers 54. The multi-point rolling support and guiding cooperation are achieved through the staggered arrangement of the rollers in the front and rear and inward and outward.

[0047] The movable frame 2 is slidably assembled between the first slide grooves 51 on both sides of the fixed frame 1, achieving overall lateral limitation. The second roller 54 at the front end of the movable frame 2 is simultaneously rolled within both the first slide groove 51 and the second slide groove 52, forming a bidirectional rolling constraint.

[0048] During the forward and backward sliding of the movable frame 2 relative to the fixed frame 1, the first roller 53 and the second roller 54 respectively roll against the inner wall of the slide groove, converting traditional sliding friction into rolling friction. This significantly reduces the running resistance of the movable frame 2's extension and retraction, making the platform's extension and retraction movements smoother and easier. Simultaneously, the double-layer slide groove, combined with the limiting structure of the front and rear multi-point rollers, effectively restricts the lateral offset, vertical movement, and torsional sway of the movable frame 2, ensuring precise extension and retraction strokes and stable operation. This enhances the overall rigidity and stability of the loading platform 3 during operation, further matching the dynamic fall prevention requirements of the equipment.

[0049] This telescopic unloading platform achieves overall vertical support, height fine-tuning, and overall reinforcement of the equipment through column support components. Together with the fixed frame 1, it completes the fixed installation of the entire equipment on the upper and lower floors, effectively improving the overall load-bearing strength and installation fit of the equipment, and ensuring the overall stability and load-bearing safety of the unloading platform during operation.

[0050] The column support assembly consists of four columns 61, the lower ends of which are fixedly connected to the fixed frame 1, achieving a stable assembly between the column support assembly and the lower fixed frame 1 to form an integral support base. Each column 61 has an adjusting screw 62 threadedly connected to its upper end. This threaded connection allows for vertical extension and retraction adjustment of the adjusting screw 62, enabling adaptive fine-tuning of the overall support height based on floor spacing errors at the construction site.

[0051] A top support plate 63 is fixedly installed at the upper end of the adjusting screw 62. The top support plate 63 directly presses against the top of the floor, increasing the contact area to improve the stability and load-bearing capacity of the top support and avoid problems such as instability and structural deformation caused by local stress concentration. The upper ends of the four columns 61 are connected to a reinforcing frame 64. The reinforcing frame 64 forms an integral frame structure with the multiple columns 61, effectively restraining the offset, swaying and deformation of individual columns 61, and greatly improving the overall structural rigidity, torsional performance and overall load-bearing capacity of the column support assembly.

[0052] During equipment installation and use, the fixed frame 1 is securely connected to the floor via multiple long screws, ensuring a stable bottom lock. Simultaneously, the vertical height is finely adjusted by rotating the adjusting screw 62, ensuring the top support plate 63 is tightly pressed against the floor top. This, combined with the bottom fixation, completes the bidirectional clamping and fixing structure, achieving a stable installation of the unloading platform as a whole. Furthermore, the reinforced frame 64 ensures even stress distribution on the multiple columns 61, preventing single-column eccentric load failure and effectively improving the overall stability of the equipment during heavy-load operation and dynamic extension / retraction. This provides a reliable structural support foundation for the stable operation of the fall protection mechanism and the telescopic sliding mechanism.

[0053] See Figure 1 , Figure 3 , Figure 8 , Figure 9 As shown, guardrails 71 are provided on both the left and right sides of the movable frame 2. The lower ends of the guardrails 71 are hinged to the movable frame 2, giving the guardrails 71 the ability to be hinged and flipped for adjustment. A limiting frame 72 is fixedly provided on the movable frame 2. The limiting frame 72 is arranged on the front side of the movable frame 2. A support rod 73 is detachably installed between the limiting frame 72 and the guardrails 71 by screws. The support rod 73 provides stable oblique support for the guardrails 71, keeping the guardrails 71 in a vertical and fixed state, forming a reliable side protection structure. The guardrails 71 can be flipped and stored by removing the support rod 73, which is suitable for equipment transportation and storage conditions.

[0054] The limiting frame 72 can slide back and forth synchronously with the movable frame 2. When the movable frame 2 retracts to its limit position, the limiting frame 72 can abut against the fixed frame 1 and use mechanical hard limiting to prevent the movable frame 2 from continuing to slide inward. This effectively prevents the movable frame 2 from retracting excessively, avoids structural collision, squeezing deformation and overtravel failure, and ensures the standardization of the equipment's extension stroke and structural safety.

[0055] Both sides of the guardrails 71 are hinged to the front of protective doors 74. The protective doors 74 can be opened and closed freely. During normal operation, closing the protective doors 74 can seal the front opening of the loading platform 3, eliminating the risk of personnel and materials falling from height and ensuring operational safety. When transporting longer objects, the protective doors 74 can be opened to remove the obstruction of the front structure and meet the loading, unloading and transport needs of long materials. At the same time, the protective doors 74 and the guardrails 71 can be used together for overall storage. After removing the support rods 73, the guardrails 71 and the hinged protective doors 74 can be flipped and folded together, and stored on the movable frame 2, effectively reducing the overall space occupied by the equipment, facilitating the storage, transportation and handling of the equipment, and taking into account both operational adaptability and storage convenience.

[0056] The column support assembly has connecting beams 81 extending in the front-to-back direction at intervals on the left and right sides. Guide members 82 are fixedly installed on the connecting beams 81, and the upper end of the guardrail 71 slides into the guide member 82. During the forward and backward sliding of the movable frame 2, the guide member 82 provides forward and backward guidance and lateral limitation for the upper end of the guardrail 71. Together with the lower hinge structure, it forms a double limitation at the top and bottom, effectively suppressing the swaying, deviation, and swinging of the guardrail 71 during the extension and retraction process. This ensures that the guardrail 71 extends and retracts synchronously and smoothly with the movable frame 2, further improving the overall stability of the equipment operation and the safety protection effect for high-altitude operations.

[0057] Locking pins 91 are movably installed on both the left and right sides of the front end of the movable frame 2. Locking holes 92 are spaced apart on the left and right inner sidewalls of the fixed frame 1, allowing the locking pins 91 to be inserted and engaged. The spaced locking holes 92 correspond to different extension stroke positions of the movable frame 2, allowing the movable frame 2 to be adjusted to a suitable extension length according to the on-site unloading operation requirements. When the movable frame 2 slides to the designated working position, the locking pins 91 are inserted into the corresponding locking holes 92 to achieve mechanical locking and fixation between the movable frame 2 and the fixed frame 1, restricting the movable frame 2 from continuing to slide back and forth. This effectively prevents the platform from retracting or shifting and shaking under conditions of carrying materials or high-altitude vibration, ensuring the stability of the platform structure during operation and significantly improving the safety and reliability of heavy-duty unloading operations.

[0058] A ramp 93 is installed on the rear side of the loading platform 3, and the ramp 93 is arranged to fit against the rear of the loading platform 3. The ramp structure can form a smooth transition surface, which facilitates the smooth pushing and handling of materials, avoids material jamming and collision, effectively improves the smoothness of material transfer, and is suitable for loading, unloading and transfer of various construction materials.

[0059] Additionally, it should be noted that the electric control components of this unloading platform feature a detachable design, allowing the drive motor to be flexibly installed and removed depending on the actual usage scenario. During on-site operation, the drive motor can be installed according to the working conditions to achieve automated electric extension and retraction; alternatively, the drive motor can be removed, and the platform extension and retraction operations can be completed using other methods or manually. The equipment is flexible in its use and adaptable to different construction conditions; see [link / reference]. Figure 10 The diagram shown is a schematic of the electric control component and the fall protection component of the present invention after disassembly.

[0060] Based on the accompanying drawings and the foregoing illustrations and descriptions, the basic principles and main features of the present invention, as well as its advantages, those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A telescopic unloading platform, comprising a fixed frame (1), a column support assembly disposed on the fixed frame (1), and a movable frame (2) that slides back and forth at the front end of the fixed frame (1), wherein a loading platform (3) is disposed on the movable frame (2), characterized in that: Support frames (7) are provided on both the left and right sides of the fixed frame (1). A reel (4) is rotatably mounted on the support frame (7). A fall arresting traction rope (5) is wound on the reel (4). A support guide wheel (6) is provided on the column support assembly. One end of the fall arresting traction rope (5) is fixedly connected to the reel (4), and the other end passes around the support guide wheel (6) and is connected to the front end of the movable frame (2). A power mechanism is provided on both the left and right sides of the fixed frame (1). The power mechanism is used to simultaneously drive the reel (4) to rotate and drive the movable frame (2) to slide. When the movable frame (2) extends forward and slides, the reel (4) releases the fall arresting traction rope (5). When the movable frame (2) retracts backward and slides, the reel (4) winds the fall arresting traction rope (5).

2. The telescopic unloading platform according to claim 1, characterized in that: The power mechanism includes a drive motor (21) mounted on the fixed frame (1), a worm gear (22) mounted on the output shaft of the drive motor (21), a rotating shaft (23) mounted on the support frame (7), a reel (4) mounted on the rotating shaft (23), a worm wheel (24) and a gear (25) mounted on the rotating shaft (23), the worm wheel (24) meshing with the worm gear (22), and a rack (26) meshing with the gear (25) mounted on the movable frame (2).

3. The telescopic unloading platform according to claim 1, characterized in that: The column support assembly is also provided with a tension adjustment mechanism for adjusting the tension of the fall arresting traction rope (5).

4. A telescopic unloading platform according to claim 3, characterized in that: The tension adjustment mechanism includes an upper adjustment seat (41) and a lower adjustment seat (42) spaced apart on the column support assembly. A telescopic seat (43) is movably extended and retractable at the front end of the upper adjustment seat (41). An adjusting guide wheel (44) is provided on the telescopic seat (43). A spring is connected between the upper adjustment seat (41) and the telescopic seat (43). A fixed guide wheel (46) is provided on the lower adjustment seat (42). The anti-fall traction rope (5) is wound around the fixed guide wheel (46) and the adjusting guide wheel (44) in sequence.

5. A telescopic unloading platform according to claim 1, characterized in that: A first sliding groove (51) is provided on the left and right inner sides of the fixed frame (1), and a second sliding groove (52) is provided on the left and right outer sides of the movable frame (2). A first roller (53) is provided at the rear end of the left and right sides of the fixed frame (1), and a second roller (54) is provided at the front end of the left and right sides of the movable frame (2). The movable frame (2) is slidably disposed between the two first sliding grooves (51), and the second roller (54) is slidably disposed within the first sliding groove (51) and the second roller (54) is slidably disposed within the second sliding groove (52).

6. A telescopic unloading platform according to claim 1, characterized in that: The column support assembly includes four columns (61) mounted on the fixed frame (1). The lower end of each column (61) is fixedly connected to the fixed frame (1), and the upper end of each column (61) is threaded with an adjusting screw (62). The upper end of the adjusting screw (62) is provided with a top support plate (63), and a reinforcing frame (64) is connected to the upper end of the four columns (61).

7. A telescopic unloading platform according to claim 1, characterized in that: Guardrails (71) are provided on both the left and right sides of the movable frame (2). The lower end of the guardrail (71) is hinged to the movable frame (2) by a hinge. A limit frame (72) is also provided on the movable frame (2). A support rod (73) is detachably installed between the limit frame (72) and the guardrail (71) by screws. The limit frame (72) is located on the front side of the movable frame (2) and can abut against the fixed frame (1), thereby restricting the movable frame (2) from sliding too much inward. A protective door (74) is hinged to the front side of both guardrails (71).

8. A telescopic unloading platform according to claim 7, characterized in that: The column support assembly is also provided with connecting beams (81) extending in the front-back direction at intervals on the left and right, and guide members (82) are provided on the connecting beams (81). The upper end of the guardrail (71) slides on the guide members (82).

9. A telescopic unloading platform according to claim 1, characterized in that: Locking pins (91) are movably provided on both the left and right sides of the front end of the movable frame (2), and locking holes (92) for the locking pins (91) to be inserted are provided at intervals on both the left and right inner sidewalls of the fixed frame (1).

10. A telescopic unloading platform according to claim 1, characterized in that: An inclined plate flap (93) is provided on the rear side of the loading platform (3).

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