Fabricated anti-falling guardrail for discharging platform

Abstract

The utility model relates to an assembly type unloading platform anti-falling guardrail which is characterized in that four sleeves are respectively fixed at four corners of an unloading platform along the vertical direction, a movable column is inserted into each sleeve, and a plurality of protective railings are distributed on three sides of the four sides of the unloading platform from top to bottom. The two end parts of the plurality of protective barriers on each side are fixedly connected with the two movable columns or the two sleeves on the same side; a pawl is rotationally connected in an assembling cavity formed in the surface of the lower end, located in the sleeve, of the movable column through a rotating shaft, a first reset spring is arranged between the free end of the pawl and the cavity wall of the assembling cavity, and a plurality of tooth grooves are sequentially formed in the inner wall of the sleeve from top to bottom; the free end of the pawl is connected with a first pulling rope, and the first pulling rope enters an inner cavity of the movable column through a hole in the side wall of the movable column and extends out of an opening in the upper end of the movable column. The beneficial effect is that the height of the guardrail can be adjusted according to the height of goods so as to adapt to different working scenes.

Description

Technical Field

[0001] This utility model relates to the field of unloading platform technology, specifically to a prefabricated unloading platform anti-fall guardrail. Background Technology

[0002] Unloading platforms, typically located at the rear of trucks or vans, are crucial for businesses transporting goods. To ensure the safety of personnel and equipment, unloading platforms must be equipped with guardrails to prevent falls and ensure the safety and integrity of the equipment.

[0003] Defect: The unloading platform carries various building materials, which may result in objects falling from a height, posing a safety hazard.

[0004] To address the aforementioned shortcomings, existing technology (Chinese patent application number: 2021204423119, application date: 2021-03-01) discloses an unloading platform. This platform forms a working surface using a base and a bottom plate, and is surrounded by guardrails around the bottom plate and fall-prevention nets outside the guardrails. The guardrails prevent workers from falling, and the fall-prevention nets outside the guardrails further prevent materials from falling. This solves the safety hazard problem of potential falling objects from heights in existing technologies.

[0005] Existing technology can prevent objects from falling from heights by installing guardrails and fall protection nets on the unloading platform. However, the height of the guardrails is fixed, which means that if the height of the goods exceeds the height of the guardrails, it will not provide sufficient protection for the taller goods and they are prone to falling. At the same time, the height of the fall protection guardrails cannot be adjusted according to work requirements, making them unsuitable for different work scenarios. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a prefabricated unloading platform anti-fall guardrail, so as to solve the problem that the height of the existing guardrail is fixed, which makes it impossible to provide sufficient protection for taller goods if the height of the goods is higher than the height of the guardrail, making it easy for them to fall. At the same time, the height of the anti-fall guardrail cannot be adjusted according to the work requirements, making it unsuitable for different work scenarios.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A prefabricated unloading platform anti-fall guardrail includes: four sleeves, which are vertically fixed at the four corners of the unloading platform. Each sleeve has a movable column inserted into it on the same axis. Multiple guardrails are distributed from top to bottom on three of the four sides of the unloading platform. Two ends of some of the guardrails on each side of the unloading platform are fixedly connected to two movable columns on the same side, and two ends of the other guardrails are fixedly connected to two sleeves on the same side. Fixed connection; an assembly cavity is provided on the lower end surface of the movable column inside the sleeve. A pawl is rotatably connected to the assembly cavity via a rotating shaft. A first return spring is provided between the free end of the pawl and the cavity wall of the assembly cavity. Multiple toothed grooves are provided on the inner wall of the sleeve from top to bottom. Under the elastic force of the first return spring, the free end of the pawl engages with one of the toothed grooves on the inner wall of the sleeve to restrict the downward movement of the movable column relative to the sleeve. A first traction rope is connected to the free end of the pawl. The first traction rope enters the inner cavity of the movable column through a hole on the side wall of the movable column and extends out from the opening at the upper end of the movable column.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, a rotating rod coaxial with the movable column is rotatably installed inside the movable column. The upper end of the rotating rod is outside the upper end of the movable column. The end of the first traction rope away from the pawl is wrapped around the lower end of the rotating rod. A spiral spring or torsion spring is sleeved on the section of the rotating rod inside the movable column to reset the rotating rod. The two ends of the spiral spring or torsion spring are connected to the rotating rod and the movable column, respectively.

[0010] Furthermore, an installation hole is made at each of the four corners of the unloading platform, and the lower end of the sleeve is inserted into the installation hole at the corner of the unloading platform.

[0011] Furthermore, the lower end of the sleeve is snap-fitted into the mounting hole at the corner of the unloading platform.

[0012] Furthermore, a worm gear is rotatably installed in the mounting cavity inside the unloading platform. One end of the worm gear extends outward from the side of the unloading platform. Two drive gears are mounted on the worm gear at corresponding positions. Upper limit plates and lower limit plates are slidably installed above and below each drive gear in the mounting cavity inside the unloading platform. Tooth blocks distributed along the length direction on the lower surface of the upper limit plate mesh with the drive gear. Tooth blocks distributed along the length direction on the upper surface of the lower limit plate mesh with the drive gear. A limiting groove is opened on the side of the section of the sleeve that is inside the mounting hole. One end of each of the two upper limit plates and the two lower limit plates is inserted into the limiting grooves on the four sleeves respectively.

[0013] Furthermore, the lower limit plate is Z-shaped.

[0014] Furthermore, two limiting blocks are slidably provided in the mounting cavity inside the unloading platform. A second return spring is provided between the opposite ends of the two limiting blocks and the inner wall of the unloading platform. A worm wheel that meshes with the worm is rotatably provided in the mounting cavity inside the unloading platform. The two limiting blocks and the worm wheel are connected by a second traction rope.

[0015] Furthermore, the second traction rope is T-shaped, with one end of the second traction rope wrapped around the shaft end of the worm gear, and the other two ends of the second traction rope fixedly connected to the opposite ends of the two limiting blocks respectively.

[0016] The beneficial effects of this utility model are: the height of the fall arrestor can be adjusted according to work requirements to provide sufficient protection for goods of different heights and prevent them from falling, making it suitable for different work scenarios and also meeting the needs of workers of different heights. The specific matching structure between the sleeve and the unloading platform facilitates quick assembly of the fall arrestor, improves work efficiency, and ensures high safety. The fall arrestor is also easy to transport after being removed from the unloading platform. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the anti-fall guardrail of the prefabricated unloading platform in this utility model;

[0018] Figure 2 This is a side view of the anti-fall guardrail of the prefabricated unloading platform in this utility model;

[0019] Figure 3 This is a cross-sectional view of the anti-fall guardrail of the prefabricated unloading platform in this utility model;

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 for Figure 3 Partial structural diagram at point A;

[0022] Figure 6 for Figure 3 Enlarged view at point B in the middle;

[0023] Figure 7 for Figure 3 Partial structural diagram at point B in the middle.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Unloading platform; 2. Sleeve; 3. Movable column; 310. Assembly cavity; 4. Pawl; 5. First return spring; 6. Tooth groove; 7. Rotating rod; 8. First traction rope; 9. Spiral spring or torsion spring; 10. Worm gear; 11. Drive gear; 12. Upper limit plate; 13. Worm wheel; 14. Second return spring; 15. Second traction rope; 16. Limit block; 17. Guardrail; 18. Lower limit plate. Detailed Implementation

[0026] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0027] Example 1

[0028] like Figures 1-5 As shown, a prefabricated unloading platform anti-fall guardrail includes: four sleeves 2, which are distributed vertically and fixed at the four corners of the unloading platform 1, that is, the four sleeves 2 are parallel to each other.

[0029] Each sleeve 2 is fitted with a movable column 3 that is coaxial with it. The movable column 3 fitted into each sleeve 2 can move up and down inside it. Three of the four sides of the unloading platform 1 are distributed with multiple guardrails 17 from top to bottom. The side without guardrails 17 is subsequently used as the entrance and exit. Among the multiple guardrails 17 on each side of the unloading platform 1, the two ends of some guardrails 17 are fixedly connected to two movable columns 3 on the same side of them. The two ends of other guardrails 17 are fixedly connected to two sleeves 2 on the same side of them.

[0030] An assembly cavity 310 is provided on the lower end surface of the movable column 3 inside the sleeve 2. A pawl 4 is rotatably connected to the assembly cavity 310 via a rotating shaft. The rotation axis of the pawl 4 is perpendicular to the moving direction of the movable column 3. A first return spring 5 is provided between the free end of the pawl 4 and the cavity wall of the assembly cavity 310. Multiple toothed grooves 6 are provided on the inner wall of the sleeve 2 from top to bottom. Under the elastic force of the first return spring 5, the free end of the pawl 4 engages with one of the toothed grooves 6 on the inner wall of the sleeve 2 to restrict the downward movement of the movable column 3 relative to the sleeve 2. A first traction rope 8 is connected to the free end of the pawl 4. The first traction rope 8 enters the inner cavity of the movable column 3 through a hole on the side wall of the movable column 3 and extends out from the opening at the upper end of the movable column 3.

[0031] When the goods placed on the unloading platform 1 are too high, the worker pulls the guardrail 17, which is fixedly connected to the movable column 3, upwards. This causes the movable column 3 to move upwards within the sleeve 2, and the pawl 4 is squeezed and rotates (the first return spring 5 is in a compressed state), disengaging from the toothed groove 6 on the inner wall of the sleeve 2, thus releasing the restriction on the movable column 3. When the movable column 3 rises to the designated height with the guardrail 17, the worker releases the external force, causing the pawl 4 to return to its original position under the elastic force of the first return spring 5 and insert into the corresponding toothed groove 6 to fix the raised movable column 3. When it is necessary to lower the movable column 3 and the guardrail 17 fixedly connected to the movable column 3... At height 7, the worker uses the first traction rope 8 to pull the pawl 4 to rotate, so that it no longer engages with the tooth groove 6, releasing the limit on the movable column 3. At this time, the movable column 3 can be pressed down to lower the guardrail 17 fixedly connected to the movable column 3. When the guardrail 17 fixedly connected to the movable column 3 has fallen to the specified height, the external force applied to the first traction rope 8 is released. At this time, the pawl 4 is reset under the elastic force of the first return spring 5 and inserts into the corresponding tooth groove 6 to fix the lowered movable column 3. Thus, by adjusting the height of the guardrail, sufficient protection can be provided for taller goods to prevent them from falling, and it can be applied to different working scenarios.

[0032] Example 2

[0033] like Figure 1 , Figure 3 , Figure 4 , Figure 5 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:

[0034] A rotating rod 7, coaxial with the movable column 3, is rotatably mounted inside the cavity of the movable column 3. The upper end of the rotating rod 7 is outside the upper end of the movable column 3. The end of the first traction rope 8 away from the pawl 4 is wrapped around the lower end of the rotating rod 7. A spiral spring 9 is fitted on the section of the rotating rod 7 inside the cavity of the movable column 3 to reset the rotating rod 7. The two ends of the spiral spring 9 are connected to the rotating rod 7 and the movable column 3, respectively. Of course, a torsion spring can be used instead of a spiral spring 9; the subsequent function is the same, that is, to rotate the rotating rod 7 to reset it. When it is necessary to lower... When lowering the height of the movable column 3 and the guardrail 17 fixedly connected to the movable column 3, the worker rotates the rotating rod 7, causing the rotating rod 7 to wind up the first traction rope 8, thereby causing the first traction rope 8 to pull the pawl 4 to rotate, so that it no longer engages with the tooth groove 6, releasing the limit on the movable column 3; when the guardrail 17 fixedly connected to the movable column 3 is lowered to the specified height, the rotating rod 7 is released, causing the rotating rod 7 to rotate in the opposite direction under the stored force of the spiral spring 9. At this time, the pawl 4 is reset under the elastic force of the first return spring 5 and inserts into the corresponding tooth groove 6.

[0035] Example 3

[0036] like Figure 1 , Figure 2 , Figure 3 As shown, this embodiment is a further improvement on embodiment 1 or 2, as detailed below:

[0037] The unloading platform 1 has a mounting hole at each of its four corners. The lower end of the sleeve 2 is inserted into the mounting hole at the corner of the unloading platform 1. The sleeve 2 is fixed by the insertion fit. That is, it can be understood that the inner diameter of the mounting hole is the same as the outer diameter of the lower end of the sleeve 2. The lower end of the sleeve 2 is inserted into the mounting hole at the corner of the unloading platform 1 to achieve fixation.

[0038] Furthermore: The above-mentioned fixing method has poor stability and is prone to falling off. Therefore, the lower end of the sleeve 2 is connected to the mounting hole at the corner of the unloading platform 1 by a snap-fit. The snap-fit ​​can effectively prevent the two from falling off.

[0039] Example 4

[0040] like Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 As shown, this embodiment is a further improvement on embodiment 3, as detailed below:

[0041] A worm gear 10 is rotatably mounted in the mounting cavity inside the unloading platform 1. One end of the worm gear 10 extends outward from the side of the unloading platform 1. Two drive gears 11 are mounted on the worm gear 10 at corresponding positions. An upper limit plate 12 and a lower limit plate 18 are slidably mounted above and below each drive gear 11 in the mounting cavity inside the unloading platform 1. The upper limit plate 12 and the lower limit plate 18 can slide on the unloading platform 1 but do not detach from the unloading platform 1. The lower surface of the upper limit plate 12... The toothed blocks distributed along its length engage with the drive gear 11, and the toothed blocks distributed along its length on the upper surface of the lower limit plate 18 also engage with the drive gear 11. A limiting groove is opened on the side of the section of each sleeve 2 located in the mounting hole. One end of each of the two upper limit plates 12 and the two lower limit plates 18 is inserted into the limiting grooves on the four sleeves 2 respectively. When the two upper limit plates 12 and the two lower limit plates 18 are inserted into the limiting grooves on the four sleeves 2 respectively, a snap-fit ​​is achieved.

[0042] By rotating the worm gear 10, the worker causes the drive gear 11 to rotate, which in turn drives the upper and lower meshing upper limit plates 12 and lower limit plates 18 to move inward to disengage from the limiting groove on the sleeve 2, thereby releasing the limitation on the sleeve 2. This facilitates the removal of the fall arrestor guardrail from the unloading platform 1 for transportation. Conversely, by rotating the worm gear 10 in the opposite direction, the worker causes the drive gear 11 to rotate, which in turn drives the upper and lower meshing upper limit plates 12 and lower limit plates 18 to move outward to insert into the limiting groove on the sleeve 2, thereby locking and limiting the sleeve 2.

[0043] Furthermore, the lower limit plate 18 is Z-shaped, which allows the limiting grooves on all sleeves 2 to be at the same height, and the height difference is compensated by the specific structure of the lower limit plate 18.

[0044] Example 5

[0045] like Figure 7 As shown, this embodiment is a further improvement on embodiment 4, as detailed below:

[0046] Two limiting blocks 16 are slidably installed in the mounting cavity inside the unloading platform 1. A second return spring 14 is installed between the opposite ends of the two limiting blocks 16 and the inner wall of the unloading platform 1. A worm wheel 13, meshing with a worm 10, is rotatably installed in the mounting cavity inside the unloading platform 1. The two limiting blocks 16 and the worm wheel 13 are connected by a second traction rope 15. By rotating the worm 10, the operator causes the worm wheel 13 to rotate and winds up the second traction rope 15, pulling the two limiting blocks 16 to move relative to each other. The second return spring 14 is compressed. During this process, the drive gear 11 rotates and drives the upper and lower meshing upper limit plates. The upper and lower limit plates 12 and 18 move inward to disengage from the limiting groove on the sleeve 2, thereby releasing the limitation on the sleeve 2. When the worker releases the worm gear 10, the elastic force of the second return spring 14 causes the two limit blocks 16 to move in opposite directions. The two limit blocks 16 will drive the worm wheel 13 to rotate through the second traction rope 15. When the worm wheel 13 rotates, it will drive the worm gear 10 to rotate in the opposite direction, so that the drive gear 11 drives the upper and lower meshing upper limit plates 12 and lower limit plates 18 to move outward to insert into the limiting groove on the sleeve 2, thereby locking and limiting the sleeve 2, which facilitates the quick assembly of the fall arrest guardrail and improves work efficiency.

[0047] Furthermore: the second traction rope 15 is T-shaped, with one end of the second traction rope 15 wrapped around the shaft end of the worm gear 13, and the other two ends of the second traction rope 15 being fixedly connected to the opposite ends of the two limiting blocks 16 respectively.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A prefabricated unloading platform fall arrest guardrail, characterized in that, include: Four sleeves (2) are fixed vertically at the four corners of the unloading platform (1). Each sleeve (2) has a coaxial movable column (3) inserted into it. Three of the four sides of the unloading platform (1) have multiple guardrails (17) distributed from top to bottom. The two ends of some of the guardrails (17) on each side of the unloading platform (1) are fixedly connected to two movable columns (3) on the same side, and the two ends of the other guardrails (17) are fixedly connected to two sleeves (2) on the same side. The movable column (3) has an assembly cavity (310) on the lower surface of the sleeve (2). A pawl (4) is rotatably connected to the assembly cavity (310) via a rotating shaft. A first return spring (5) is provided between the free end of the pawl (4) and the cavity wall of the assembly cavity (310). Multiple toothed grooves (6) are provided on the inner wall of the sleeve (2) from top to bottom. Under the elastic force of the first return spring (5), the free end of the pawl (4) engages with one of the toothed grooves (6) on the inner wall of the sleeve (2) to restrict the downward movement of the movable column (3) relative to the sleeve (2). A first traction rope (8) is connected to the free end of the pawl (4). The first traction rope (8) enters the inner cavity of the movable column (3) through the hole on the side wall of the movable column (3) and extends out from the opening at the upper end of the movable column (3).

2. The prefabricated unloading platform fall arrestor according to claim 1, characterized in that, A rotating rod (7) is rotatably mounted in the inner cavity of the movable column (3) and is coaxial with it. The upper end of the rotating rod (7) is outside the upper end of the movable column (3). The end of the first traction rope (8) away from the pawl (4) is wrapped around the lower end of the rotating rod (7). A spiral spring or torsion spring (9) is sleeved on the section of the rotating rod (7) in the inner cavity of the movable column (3) to reset the rotating rod (7). The two ends of the spiral spring or torsion spring (9) are connected to the rotating rod (7) and the movable column (3) respectively.

3. A prefabricated unloading platform fall arrestor as described in claim 1 or 2, characterized in that, The unloading platform (1) has a mounting hole at each of its four corners, and the lower end of the sleeve (2) is inserted into the mounting hole at the corner of the unloading platform (1).

4. The prefabricated unloading platform fall arrestor according to claim 3, characterized in that, The lower end of the sleeve (2) is engaged with the mounting hole at the corner of the unloading platform (1).

5. The prefabricated unloading platform fall arrestor according to claim 4, characterized in that, A worm gear (10) is rotatably installed in the mounting cavity inside the unloading platform (1). One end of the worm gear (10) extends out of the unloading platform (1) via the side of the unloading platform (1). Two drive gears (11) are fitted on the worm gear (10) at corresponding positions. An upper limit plate (12) and a lower limit plate (18) are slidably provided above and below each drive gear (11) in the mounting cavity inside the unloading platform (1). The tooth blocks distributed along the length direction on the lower surface of the upper limit plate (12) mesh with the drive gear (11). The tooth blocks distributed along the length direction on the upper surface of the lower limit plate (18) mesh with the drive gear (11). A limiting groove is opened on the side of the section of the sleeve (2) located in the mounting hole at the lower end. One end of each of the two upper limit plates (12) and the two lower limit plates (18) is inserted into the limiting grooves on the four sleeves (2) respectively.

6. The prefabricated unloading platform fall arrestor according to claim 5, characterized in that, The lower limit plate (18) is Z-shaped.

7. The prefabricated unloading platform fall arrestor according to claim 5, characterized in that, Two limiting blocks (16) are slidably provided in the mounting cavity inside the unloading platform (1). A second return spring (14) is provided between the opposite ends of the two limiting blocks (16) and the inner wall of the unloading platform (1). A worm wheel (13) that meshes with the worm (10) is rotatably provided in the mounting cavity inside the unloading platform (1). The two limiting blocks (16) and the worm wheel (13) are connected by a second traction rope (15).

8. A prefabricated unloading platform fall arrestor according to claim 7, characterized in that, The second traction rope (15) is T-shaped. One end of the second traction rope (15) is wrapped around the shaft end of the worm gear (13), and the other two ends of the second traction rope (15) are fixedly connected to the opposite ends of the two limiting blocks (16).

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