Lifting platform edge guardrail

Abstract

The utility model discloses an edge guardrail of a lifting platform, relates to the related field of guardrails, and aims to solve the problems that in the prior art, no locking and fixing structure exists, the buckle connection mode is invalid when the guardrail moves in the buckle direction, the connectivity of adjacent guardrails is reduced if the guardrail is mounted on the lifting platform and deforms, and the protection effect is influenced. Side rectangular open grooves are formed in the upper end and the lower end of the outer side face of the fixed vertical rod, and inner oval open grooves are formed in the fixed vertical rod along the inner sides of the side rectangular open grooves. The fixing assembly comprises a rotating shaft, the rotating shaft penetrates through the fixing vertical plate to extend outwards and is fixedly provided with a fixing vertical shaft, the upper end and the lower end of the interior of the fixing vertical shaft are slidably connected with an inner limiting disc, an outer telescopic rod is fixed to the middle of the outer end of the inner limiting disc, and the outer telescopic rod extends outwards and is fixedly provided with an anti-skid head. A pressure spring is arranged between the inner end face of the fixed vertical shaft and the inner limiting disc along the outer portion of the outer telescopic rod.

Description

Technical Field

[0001] This utility model relates to the field of guardrails, specifically to an edge guardrail for a lifting platform. Background Technology

[0002] Lifting platforms, as indispensable vertical transportation equipment in modern construction sites and industrial production, are widely used in worker operations, material handling, and high-altitude work. Their basic structure typically includes a body, lifting device, traveling mechanism, and work platform. During use, materials or workers are placed on the work platform and lifted to the required height by the lifting device to perform various work activities. However, as the height of lifting platforms increases, the safety protection of the work platform edges becomes increasingly important. To ensure the safety of workers during operations and prevent injuries from accidental falls or collisions, safety railings are usually installed around the work platform.

[0003] For example, the Chinese authorized patent with publication number CN 217201913 U (A Guardrail for a Lifting Platform) includes a base, a guardrail, and a buckle. The base is connected to the lifting platform, and the guardrail is located above the base and movably connected to it. Multiple guardrails are provided. The buckle is located above the guardrail and is used to connect and fix adjacent guardrails. In this utility model, the guardrail can be in an open or closed state relative to the base. When the guardrail is in the open state, the overall height is reduced, making it easier to pass through height-restricted spaces. When the guardrail is in the closed state, adjacent guardrails are connected and fixed by the buckle, allowing the performance of work tasks. At the same time, the guardrail does not need to be disassembled during transportation and use, saving time and effort and eliminating the safety hazards associated with disassembling the guardrail.

[0004] Although the aforementioned existing technology has the function of connecting adjacent guardrails, it lacks a locking and fixing structure. When an impact force from the inside out is applied to a guardrail, the guardrail deforms, causing the snap-fit ​​connection to fail. This affects the snap-fit ​​connection, resulting in adjacent guardrails not exerting any pulling force on the guardrail. The overall impact resistance is weak, affecting the protective effect. Utility Model Content

[0005] The purpose of this utility model is to provide an edge guardrail for a lifting platform to solve the problems mentioned in the background art, such as the lack of a locking and fixing structure, the failure of the buckle connection when the guardrail moves along the buckle direction, and the reduced connectivity of adjacent guardrails due to deformation when installed on the lifting platform, thus affecting the protective effect.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lifting platform edge guardrail, including an outer guardrail frame, a fixed upright plate welded and fixed on one side of the outer guardrail frame, and a fixed upright post on the other side of the outer guardrail frame. The upper and lower ends of the outer side of the fixed upright post are provided with side rectangular slots, and the interior of the fixed upright post is provided with an inner elliptical slot along the inner side of the side rectangular slot. The upper and lower ends and front and rear ends of the inner elliptical slot are set as planar surfaces. A fixing component is provided on the upper and lower ends of the outer guardrail frame near the fixed upright plate. The fixing component includes a rotating shaft, which is rotatably connected to both the outer guardrail frame and the fixed upright plate. The rotating shaft extends outward through the fixed upright plate and is fixed to a fixed vertical shaft. An inner limiting plate is slidably connected to the upper and lower ends of the fixed vertical shaft. An outer telescopic rod is fixed in the center of the outer end of the inner limiting plate. The outer telescopic rod extends outward and is fixed with an anti-slip head. A pressure spring is provided between the inner end face of the fixed vertical shaft and the inner limiting plate along the outer side of the outer telescopic rod.

[0007] Preferably, in the retracted state of the fixing component, the sum of the lengths of the fixed vertical shaft and the two anti-slip heads is equal to the width of the inner elliptical slot; in the normal state of the fixing component, the sum of the lengths of the fixed vertical shaft, the two outer telescopic rods, and the two anti-slip heads is less than the height of the inner elliptical slot; and in the normal state of the fixing component, the sum of the lengths of the fixed vertical shaft, the two outer telescopic rods, and the two anti-slip heads is equal to the height of the side rectangular slot.

[0008] Preferably, a lower support rod is welded and fixed to the lower end of the outer frame of the guardrail, and guardrail bars are fixed in an array between the lower support rod and the crossbar of the outer frame of the guardrail. Multiple embedded fixing rods are fixed to the lower end of the lower support rod, and a rectangular limiting groove is opened through the outer frame of the guardrail and the guardrail bars from top to bottom.

[0009] Preferably, the edge guardrail of the lifting platform further includes a height adjustment component, which consists of an upper fixing strip and a lower plate. The upper fixing strip is attached to the upper end face of the crossbar of the outer frame of the guardrail, and the lower plate is located in the rectangular limiting groove and slides along the rectangular limiting groove. Multiple through holes are opened on the middle guardrail, and a slot is opened at the position of the bottommost through hole on the upper edge of the lower plate. The middle guardrail and the lower plate are fixed by bolts.

[0010] Preferably, the fixed vertical shaft is configured with an inner sliding cavity, the inner limiting plate slides along the inner sliding cavity, and the upper and lower end faces of the fixed vertical shaft are configured with outer sliding grooves, and the outer telescopic rod slides along the outer sliding grooves.

[0011] Preferably, a side limiting plate is fixed on the side of the fixed vertical shaft away from the fixed vertical shaft, the side limiting plate is attached to the inner surface of the outer frame of the guardrail, and a fixing ear is fixed on the other side of the side limiting plate.

[0012] Preferably, the outer side of the fixed upright is provided as an arc-shaped contact surface, and the diameter of the arc-shaped contact surface is the same as that of the fixed upright; a fixing block is welded and fixed to one side of the outer frame of the guardrail along the upper and lower ends of the fixed upright, and the fixing block is welded and fixed to the fixed upright.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, the design of the fixing components makes the connection between guardrails more stable. By rotating the fixing ears, the rotating shaft, the fixed vertical shaft, the outer telescopic rod and the anti-slip head are driven to work together. Utilizing the shape characteristics of the inner elliptical groove, the anti-slip head generates gradually increasing pressure on the fixed vertical rod until the maximum locking point is reached. This mechanism is not only easy to install, but also greatly enhances the connection stability between guardrails, effectively preventing loosening under long-term use or external impact. It solves the problem that without a locking and fixing structure, the guardrail moving along the buckle direction will cause the buckle connection to fail, and if the guardrail is deformed when installed on a lifting platform, the connection between adjacent guardrails will be reduced, affecting the protective effect.

[0015] (2) In this utility model, the height adjustment component is designed so that the height of the guardrail can be flexibly adjusted according to actual needs. The upper fixing strip is attached to the upper end face of the crossbar of the outer frame of the guardrail, and the lower plate slides in the rectangular limiting groove and is fixed to the middle guardrail bar by bolts. This design not only simplifies the height adjustment process, but also ensures the stability after the height adjustment.

[0016] (3) In this utility model, the fixed vertical shaft is provided with an inner sliding cavity, and the inner limiting plate slides along the inner sliding cavity. At the same time, the upper and lower end faces of the fixed vertical shaft are provided with outer sliding grooves, and the outer telescopic rod slides along the outer sliding grooves. This ensures the smooth operation of the fixing component in both the contracted and normal states, while also enhancing the stability and durability of the structure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the edge guardrail of a lifting platform from the main view of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of the edge guardrail of a lifting platform from a lower view according to the present invention;

[0019] Figure 3 This is a partial sectional view of the fixing upright of the edge guardrail of a lifting platform according to the present invention;

[0020] Figure 4 This is a structural schematic diagram of a fixing component for the edge guardrail of a lifting platform according to the present invention;

[0021] Figure 5This is a cross-sectional view of a fixing component for the edge guardrail of a lifting platform according to the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of a height adjustment component for the edge guardrail of a lifting platform according to the present invention;

[0023] Figure 7 This is a schematic diagram of the structure of the edge guardrail of the lifting platform of this utility model after the height adjustment component has been removed.

[0024] In the diagram: 1. Lower support rod; 2. Embedded fixing rod; 3. Guardrail outer frame; 4. Guardrail post; 5. Fixing block; 6. Fixing upright; 7. Side rectangular slot; 8. Inner elliptical slot; 9. Fixing plate; 10. Arc-shaped fitting surface; 11. Fixing component; 12. Fixing ear; 13. Side limiting plate; 14. Rotating shaft; 15. Fixing upright; 16. Inner sliding cavity; 17. Outer sliding groove; 18. Inner limiting plate; 19. Outer telescopic rod; 20. Anti-slip head; 21. Pressure spring; 22. Height adjustment component; 23. Upper fixing strip; 24. Lower plate; 25. Rectangular limiting groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Please see Figures 1-7 One embodiment provided by this utility model:

[0027] like Figures 1-5As shown, the guardrail outer frame and fixing components are as follows: A fixing plate 9 is welded and fixed to one side of the guardrail outer frame 3. The outer surface of the fixing plate 9 is set as an arc-shaped fitting surface 10. A fixing post 6 is set on the other side of the guardrail outer frame 3. The arc-shaped fitting surface 10 has the same diameter as the fixing post 6. Fixing blocks 5 are welded and fixed to the upper and lower ends of the fixing post 6 on one side of the guardrail outer frame 3. The fixing blocks 5 are welded and fixed to the fixing post 6. The upper and lower ends of the outer surface of the fixing post 6 are provided with side rectangular slots 7. An inner elliptical slot 8 is provided inside the side rectangular slots 7. The upper and lower ends and the front and rear ends of the inner elliptical slot 8 are set as flat surfaces to avoid the end face arc causing poor fitting of the mating structure and thus instability. Fixing components 11 are set on the upper and lower ends of the guardrail outer frame 3 near the fixing plate 9, including a rotating shaft 14. The rotating shaft 14 is rotatably connected to both the guardrail outer frame 3 and the fixing plate 9. A rotating shaft 14 extends outward through a fixed upright plate 9 and is fixed to a fixed upright shaft 15. The fixed upright shaft 15 has an inner sliding cavity 16 inside and outer sliding grooves 17 on its upper and lower end faces. An inner limiting plate 18 is slidably connected to the upper and lower ends inside the inner sliding cavity 16. An outer telescopic rod 19 is fixed in the center of the outer end of the inner limiting plate 18. The outer telescopic rod 19 slides along the outer sliding groove 17 and extends outward, and is fixed with an anti-slip head 20. A pressure spring 21 is provided between the inner end face of the fixed upright shaft 15 and the inner limiting plate 18 along the outer side of the outer telescopic rod 19. A side limiting plate 13 is fixed on the side of the fixed upright shaft 15 away from the fixed upright shaft 15. The side limiting plate 13 fits against the inner surface of the outer frame 3 of the guardrail, and a fixing ear 12 is fixed on the other side.

[0028] When installing adjacent guardrails, the arc-shaped mating surface 10 of the fixed upright plate 9 is mated with the fixed upright 6. The fixed shaft 15, the outer telescopic rod 19, and the anti-slip head 20 will enter the inner elliptical groove 8 of the fixed upright 6 along the rectangular groove 7 on the upper side of the fixed upright 6. After all the guardrails are installed, rotating the fixed ear 12 will drive the rotating shaft 14, the fixed shaft 15, the outer telescopic rod 19, and the anti-slip head 20 to rotate. Since the fixed shaft 15, the outer telescopic rod 19, and the anti-slip head 20 are located in the inner elliptical groove 8, the shape of the inner elliptical groove 8 causes the outer telescopic rod 19 to gradually press into the fixed shaft 15, and the pressure spring 21 is pulled and extended. As the reaction force of the pressure spring 21 continues to move outward, the pressure of the anti-slip head 20 on the fixed upright 6 gradually increases. When the fixed assembly 11 rotates so that the fixed shaft 15 is perpendicular to the direction of the side rectangular groove 7, the pressure of the anti-slip head 20 on the fixed upright 6 reaches its maximum point, playing a connecting and locking role.

[0029] like Figures 1-4As shown, the dimensions and operation of the fixing component are as follows: In the retracted state of the fixing component 11, the sum of the lengths of the fixed vertical shaft 15 and the two anti-slip heads 20 is equal to the width of the inner elliptical slot 8. In the normal state of the fixing component 11, the sum of the lengths of the fixed vertical shaft 15, the two outer telescopic rods 19, and the two anti-slip heads 20 is less than the height of the inner elliptical slot 8, and equal to the height of the side rectangular slot 7. This design ensures that the fixing component 11 can pass normally through the side rectangular slot 7 and smoothly enter and lock into the inner elliptical slot 8 during rotation.

[0030] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the basic structure and height adjustment components are as follows: A lower support rod 1 is welded and fixed to the lower end of the outer frame 3 of the guardrail. Guardrail bars 4 are fixed in an array between the lower support rod 1 and the crossbar of the outer frame 3. Multiple embedded fixing rods 2 are fixed to the lower end of the lower support rod 1 for fixing to the lifting platform. During installation, the lower support rod 1 is aligned with the lifting platform, the embedded fixing rods 2 are inserted into the reserved holes, and then welded and fixed.

[0031] A rectangular limiting groove 25 is provided running from top to bottom on both the outer frame 3 and the guardrail 4.

[0032] The lifting platform edge guardrail also includes a height adjustment component 22, consisting of an upper fixing strip 23 and a lower plate 24. The upper fixing strip 23 is attached to the upper end face of the crossbar of the outer frame 3 of the guardrail, and the lower plate 24 is located in the rectangular limiting groove 25 and slides along the rectangular limiting groove 25. The middle guardrail 4 has multiple through holes, and the lower plate 24 has a slot at the position of the lowest through hole. The middle guardrail 4 and the lower plate 24 are fixed with bolts to achieve flexible height adjustment to meet the needs of different scenarios.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A lift platform edge guard rail comprising a guard rail outer frame (3), characterized in that: The outer frame (3) of the guardrail is welded with a fixed vertical plate (9) on one side, and is provided with a fixed vertical rod (6) on the other side, the upper and lower ends of the outer side of the fixed vertical rod (6) are provided with a side rectangular slot (7), and the inside of the fixed vertical rod (6) is provided with an inner elliptical slot (8) along the inside of the side rectangular slot (7), and the upper and lower ends and the front and rear ends of the inner elliptical slot (8) are provided with a flat surface; the upper and lower ends of the outer frame (3) of the guardrail close to the fixed vertical plate (9) on one side are provided with a fixed component (11), the fixed component (11) comprises a rotating shaft (14), the rotating shaft (14) is rotatably connected with the outer frame (3) of the guardrail and the fixed vertical plate (9), the rotating shaft (14) extends outwardly through the fixed vertical plate (9) and is fixed with a fixed vertical shaft (15), the upper and lower ends of the inside of the fixed vertical shaft (15) are slidably connected with an inner limiting disc (18), the outer end of the inner limiting disc (18) is fixed with an outer telescopic rod (19), the outer telescopic rod (19) extends outwardly and is fixed with an anti-skid head (20), and a compression spring (21) is arranged between the inner end surface of the fixed vertical shaft (15) and the inner limiting disc (18) along the outside of the outer telescopic rod (19).

2. A lift platform edge guardrail according to claim 1, characterized in that: The length of the fixed vertical shaft (15) and the two anti-skid heads (20) in the contracted state of the fixed component (11) is equal to the width of the inner elliptical slot (8), the length of the fixed vertical shaft (15), the two outer telescopic rods (19) and the two anti-skid heads (20) in the normal state of the fixed component (11) is less than the height of the inner elliptical slot (8), and the length of the fixed vertical shaft (15), the two outer telescopic rods (19) and the two anti-skid heads (20) in the normal state of the fixed component (11) is equal to the height of the side rectangular slot (7).

3. The elevated platform edge guard of claim 1, wherein: The lower end of the outer frame (3) of the guardrail is welded with a lower supporting rod (1), a guardrail rod (4) is fixed between the horizontal rod of the outer frame (3) of the guardrail and the lower supporting rod (1), a plurality of embedded fixed rods (2) are fixed at the lower end of the lower supporting rod (1), and a rectangular limiting groove (25) is formed in the outer frame (3) of the guardrail and the guardrail rod (4) from top to bottom.

4. A lift platform edge guardrail according to claim 3, wherein: The edge guardrail of the lifting platform further comprises a height adjusting assembly (22), which is composed of an upper fixed strip (23) and a lower plate body (24), the upper fixed strip (23) is attached to the upper end surface of the horizontal rod of the outer frame (3) of the guardrail, the lower plate body (24) is located in the rectangular limiting groove (25) and slides along the rectangular limiting groove (25), a plurality of through holes are formed in the guardrail rod (4) in the middle, a hole groove is formed in the lower plate body (24) along the position of the lowermost through hole, and the guardrail rod (4) in the middle is fixed with the lower plate body (24) by bolts.

5. The elevated platform edge guard of claim 1, wherein: The inside of the fixed vertical shaft (15) is provided with an inner sliding cavity (16), the inner limiting disc (18) slides along the inner sliding cavity (16), the upper and lower end surfaces of the fixed vertical shaft (15) are provided with an outer sliding groove (17), and the outer telescopic rod (19) slides along the outer sliding groove (17).

6. The elevated platform edge guard of claim 1, wherein: The fixed vertical shaft (15) is externally fixed with a side limiting disc (13) away from the fixed vertical shaft (15), the side limiting disc (13) is attached to the inner surface of the guardrail outer frame (3), and the other side of the side limiting disc (13) is fixed with a fixed lug (12).

7. The elevated platform edge guard of claim 1, wherein: The outer side of the fixed vertical plate (9) is provided with an arc-shaped fitting surface (10) which is the same in diameter as the fixed vertical rod (6); and the guardrail outer frame (3) is welded with a fixed block (5) at one side along the upper and lower ends of the fixed vertical rod (6), and the fixed block (5) is welded with the fixed vertical rod (6).

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