Loading and unloading safety protection device

Abstract

The utility model relates to the technical field of loading and unloading protection, and discloses a loading and unloading safety protection device which comprises a lifting platform, the two sides of the top end of the lifting platform are respectively and movably connected with a set of protection frames, the lower end of the lifting platform is provided with a bottom cover, and the top end of the bottom cover is fixedly connected with a fixing frame. A lifting mechanism used for adjusting the height is arranged at the bottom end of the lifting table. According to the loading and unloading safety protection device, the lifting frame is arranged, during unloading, goods are firstly conveyed to the top end of the lifting table, then the hydraulic rod is started to drive the lifting table to ascend and descend, the lifting table is lifted to the position with the same height as the unloading platform, and therefore the goods are conveniently conveyed to the unloading platform; goods are conveyed to the top end of the lifting table, then the lifting table is adjusted to the position as high as a boxcar so as to facilitate feeding, the lifting table drives the lifting frame to be attached to the outer portion of the fixing frame during lifting so that the lifting table can be limited, it is guaranteed that the lifting table is stable enough during lifting, and the problem that height difference is prone to occurring during loading and unloading is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of loading and unloading protection, and particularly relates to a loading and unloading safety protection device. Background Art

[0002] In some construction sites and factories, a large number of goods enter and exit every day, and vehicles keep coming and going to deliver the goods in and out. In order to facilitate the loading and unloading of goods, loading and unloading platforms are generally built at the entrances of large factories, which are specifically used for unloading goods from trucks or loading goods into trucks. Since the loading and unloading platforms are built in advance, their structures and heights are fixed, and they cannot fully match trucks of different specifications, which will affect the loading and unloading process due to problems such as height and width, and pose potential safety hazards. Therefore, special protection devices are needed to protect the goods and workers during the loading and unloading process.

[0003] However, there are still some defects in the current safety protection devices for loading and unloading goods. When loading and unloading goods, the lifting platform of the safety protection device is raised to the same height as the truck carriage. During the lifting process, the lifting platform is lifted by power, and there are potential safety hazards due to the lack of effective limit guidance. Moreover, in this case, manual handling and cart transportation will be affected, thus affecting the loading and unloading efficiency.

[0004] Now a new type of loading and unloading safety protection device is proposed to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a loading and unloading safety protection device.

[0006] To achieve the above purpose, the technical solution of the utility model is: a loading and unloading safety protection device, including a lifting platform, a group of protective frames are respectively movably connected to both sides of the top of the lifting platform, a bottom cover is arranged at the lower end of the lifting platform, a fixed frame is fixedly connected to the top of the bottom cover, and a lifting mechanism for adjusting the height is arranged at the bottom end of the lifting platform;

[0007] The lifting mechanism includes a lifting frame and a hydraulic rod. The bottom end of the lifting platform is fixedly connected to the lifting frame, and hydraulic rods are fixedly connected to both sides of the top of the bottom cover. The output end of the hydraulic rod is fixedly connected to the lifting platform.

[0008] Furthermore, a reinforcement plate is arranged at the connection between the fixed frame and the bottom cover.

[0009] Furthermore, the fixed frame is movably connected to the lifting frame, and the center line of the lifting frame and the center line of the lifting platform are on the same vertical plane.

[0010] Furthermore, a closed bin is fixedly connected inside the lifting platform. Activity slots are arranged on both sides inside the lifting platform. A connecting plate is movably connected inside the activity slots. The connecting plate is fixedly connected to the protective frame. A metal mesh is fixedly connected inside the protective frame. A threaded sleeve is fixedly connected to one side of the connecting plate. A bidirectional lead screw is movably connected inside the activity slots. The bidirectional lead screw passes through the inside of the closed bin. A driven sprocket is arranged inside the closed bin. The driven sprocket is fixedly sleeved on the bidirectional lead screw. An installation slot is fixedly connected to the bottom end of the lifting platform. A driving motor is fixedly connected inside the installation slot. The output end of the driving motor is fixedly connected to a driving sprocket. A transmission chain is movably connected to the outside of the driving sprocket. A support frame is fixedly connected to the bottom end of one side of the protective frame.

[0011] Furthermore, the transmission chain extends into the closed bin and is movably connected to the driven sprocket. The bidirectional lead screw is in threaded connection with the threaded sleeve.

[0012] Furthermore, the support frame is slidably connected to the lifting platform.

[0013] Furthermore, a hydraulic cylinder is fixedly connected to the top end of the bottom cover. The output end of the hydraulic cylinder extends into the bottom cover and is fixedly connected to a lifting plate. A cross plate is fixedly connected to the bottom end inside the bottom cover. A limiting post is fixedly connected to the top end of the cross plate. Through holes are formed on both sides of the lifting plate. Movable wheels are fixedly connected to both sides of the two ends at the bottom of the lifting plate.

[0014] Furthermore, the limiting post is slidably connected to the through hole. The movable wheels at the bottom end of the lifting plate are arranged symmetrically.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: This loading and unloading safety protection device not only realizes automatic lifting for convenient loading and unloading, realizes the adjustment of the width of the protection structure according to the width of the platform, but also realizes convenient movement.

[0016] (1) By providing a lifting frame, a fixed frame, a reinforcing plate and a hydraulic rod, during unloading, the goods are first transported to the top end of the lifting platform, and then the hydraulic rod is started to drive the lifting platform to lift, and the lifting platform is lifted to a position equal to the height of the unloading platform, so as to facilitate the delivery of the goods to the unloading platform. Similarly, during loading, after the goods are transported to the top end of the lifting platform, the lifting platform is adjusted to a position equal to the height of the truck carriage for convenient loading. When the lifting platform lifts, the lifting frame is driven to fit on the outside of the fixed frame to limit the lifting platform, ensuring that the lifting platform is stable enough when rising, and realizing the adjustment of height for convenient loading and unloading of goods.

[0017] (2) By providing a protective frame, movable slots, a closed bin, a bidirectional wire shaft, threaded sleeves, support frames, connecting plates, drive motors, mounting slots, metal meshes, drive chains, drive sprockets and driven sprockets, before loading and unloading, the drive motor can be started to drive the drive sprocket to rotate. The drive sprocket drives the driven sprocket to rotate through the drive chain, and the driven sprocket then drives the bidirectional wire shaft to rotate. The bidirectional wire shaft drives the connecting plate and the protective frame to move through the threaded sleeves, and the protective frame can be adjusted to a suitable position according to the width of the loading and unloading platform. The protective frame and the internal metal mesh can effectively prevent the phenomenon of goods falling due to the dumping of goods during the loading and unloading process, so as to improve the safety of the loading and unloading work, and realize that the width of the protective structure can be adjusted according to the width of the loading and unloading platform.

[0018] (3) By providing a bottom cover, a horizontal plate, a lifting plate, a hydraulic cylinder, moving wheels, limit posts and through holes, when it is necessary to move the device, the hydraulic cylinder is started to drive the lifting plate to descend. The lifting plate then drives the moving wheels to descend and reversely jacks up the top structure. After that, the device can be conveniently pushed to move. The limit posts inside the bottom cover can limit the lifting plate through the through holes, improve the stability of the lifting plate and the moving wheels during the moving process, prevent the device from shaking. After moving to the designated loading and unloading platform, the hydraulic cylinder is started to drive the lifting plate to rise, thereby lowering the whole device, so that the bottom cover fits the ground to support the device, and realizes convenient movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a front sectional structure schematic diagram of the present utility model;

[0020] Figure 2 is a side sectional structure schematic diagram of the movable slot of the present utility model;

[0021] Figure 3 is a top sectional structure schematic diagram of the lifting plate of the present utility model;

[0022] Figure 4 is of the present utility model Figure 1 is an enlarged structure schematic diagram at A in

[0023] In the figure: 1, lifting platform; 2, protective frame; 3, movable slot; 4, closed bin; 5, bidirectional wire shaft; 6, threaded sleeve; 7, support frame; 8, connecting plate; 9, lifting frame; 10, fixed frame; 11, bottom cover; 12, horizontal plate; 13, lifting plate; 14, hydraulic cylinder; 15, moving wheel; 16, limit post; 17, reinforcement plate; 18, hydraulic rod; 19, drive motor; 20, mounting slot; 21, metal mesh; 22, through hole; 23, drive chain; 24, drive sprocket; 25, driven sprocket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Embodiment:

[0025] Please refer to Figures 1-4 , a loading and unloading safety protection device, including a lifting platform 1. On both sides of the top of the lifting platform 1, a group of protective frames 2 are movably connected respectively. At the lower end of the lifting platform 1, a bottom cover 11 is provided. At the top of the bottom cover 11, a fixed frame 10 is fixedly connected. At the bottom end of the lifting platform 1, a lifting mechanism for adjusting the height is provided;

[0026] The lifting mechanism includes a lifting frame 9 and a hydraulic rod 18. At the bottom end of the lifting platform 1, a lifting frame 9 is fixedly connected. On both sides of the top of the bottom cover 11, hydraulic rods 18 are fixedly connected. The output end of the hydraulic rod 18 is fixedly connected to the lifting platform 1;

[0027] At the connection between the fixed frame 10 and the bottom cover 11, a reinforcement plate 17 is provided;

[0028] The fixed frame 10 is movably connected to the lifting frame 9. The center line of the lifting frame 9 and the center line of the lifting platform 1 are on the same vertical plane;

[0029] When unloading, the goods are first transported to the top of the lifting platform 1, and then the hydraulic rod 18 is started to drive the lifting platform 1 to lift, and the lifting platform 1 is lifted to a position equal to the height of the unloading platform, so as to facilitate the delivery of the goods to the unloading platform. Similarly, when loading, after the goods are transported to the top of the lifting platform 1, the lifting platform 1 is adjusted to a position equal to the height of the freight car compartment to facilitate loading. When the lifting platform 1 lifts, the lifting frame 9 is driven to fit outside the fixed frame 10, which can limit the position of the lifting platform 1 and ensure that the lifting platform 1 is stable enough when rising, realizing the function of adjusting the height to facilitate the loading and unloading of goods.

[0030] Preferably in this embodiment, a closed bin 4 is fixedly connected inside the lifting platform 1. On both sides inside the lifting platform 1, movable grooves 3 are provided. Inside the movable grooves 3, connecting plates 8 are movably connected. The connecting plates 8 are fixedly connected to the protective frames 2. Inside the protective frames 2, metal meshes 21 are fixedly connected. On one side of the connecting plates 8, threaded sleeves 6 are fixedly connected. Inside the movable grooves 3, bidirectional lead screws 5 are movably connected. The bidirectional lead screws 5 pass through the inside of the closed bin 4. Inside the closed bin 4, driven sprockets 25 are provided. The driven sprockets 25 are fixedly sleeved on the bidirectional lead screws 5. At the bottom end of the lifting platform 1, an installation groove 20 is fixedly connected. Inside the installation groove 20, a driving motor 19 is fixedly connected. The output end of the driving motor 19 is fixedly connected to a driving sprocket 24. Outside the driving sprocket 24, a transmission chain 23 is movably connected. At the bottom end of one side of the protective frame 2, a support frame 7 is fixedly connected;

[0031] The transmission chain 23 extends into the inside of the closed bin 4 and is movably connected to the driven sprocket 25. The bidirectional lead screw 5 is threadedly connected to the threaded sleeve 6;

[0032] The support frame 7 is slidably connected to the lifting platform 1;

[0033] Before loading and unloading, the driving motor 19 can be started to drive the driving sprocket 24 to rotate. The driving sprocket 24 drives the driven sprocket 25 to rotate through the transmission chain 23. The driven sprocket 25 then drives the bidirectional lead screw 5 to rotate. The bidirectional lead screw 5 drives the connecting plate 8 and the protective frame 2 to move through the threaded sleeve 6, and the protective frame 2 is adjusted to a suitable position according to the width of the loading and unloading platform. The protective frame 2 and the internal metal mesh 21 can effectively prevent the phenomenon of goods falling due to the dumping of goods during loading and unloading, so as to improve the safety of loading and unloading work, and realize that the width of the protective structure can be adjusted according to the width of the loading and unloading platform.

[0034] Preferably in this embodiment, a hydraulic cylinder 14 is fixedly connected to the top end of the bottom cover 11. The output end of the hydraulic cylinder 14 extends into the bottom cover 11 and is fixedly connected to a lifting plate 13. A cross plate 12 is fixedly connected to the bottom end inside the bottom cover 11. A limiting column 16 is fixedly connected to the top end of the cross plate 12. Through holes 22 are formed on both sides of the lifting plate 13. Movable wheels 15 are fixedly connected to both sides of both ends of the bottom of the lifting plate 13;

[0035] The limiting column 16 is slidably connected to the through hole 22, and the movable wheels 15 at the bottom end of the lifting plate 13 are arranged symmetrically;

[0036] When the device needs to be moved, the hydraulic cylinder 14 is started to drive the lifting plate 13 to descend. The lifting plate 13 then drives the movable wheels 15 to descend and reversely jack up the top structure. After that, the device can be conveniently pushed to move. The limiting column 16 inside the bottom cover 11 can limit the lifting plate 13 through the through hole 22, improve the stability of the lifting plate 13 and the movable wheels 15 during the moving process, and prevent the device from shaking. After moving to the loading and unloading platform at the designated position, the hydraulic cylinder 14 is started to drive the lifting plate 13 to rise, so as to lower the whole device, and the bottom cover 11 is attached to the ground to support the device, realizing convenient movement.

[0037] Working principle: When the utility model is in use, before loading and unloading, the driving motor 19 can be started to drive the driving sprocket 24 to rotate. The driving sprocket 24 drives the driven sprocket 25 to rotate through the transmission chain 23. The driven sprocket 25 then drives the bidirectional lead screw 5 to rotate. The bidirectional lead screw 5 drives the connecting plate 8 and the protective frame 2 to move through the threaded sleeve 6, and the protective frame 2 is adjusted to a suitable position according to the width of the loading and unloading platform. The protective frame 2 and the internal metal mesh 21 can effectively prevent the phenomenon of goods falling due to the dumping of goods during the loading and unloading process, so as to improve the safety of the loading and unloading work. When unloading, the goods are first transported to the top of the lifting platform 1, and then the hydraulic rod 18 is started to drive the lifting platform 1 to lift and lower the lifting platform 1 to a position equal to the height of the unloading platform, so as to facilitate the delivery of the goods to the unloading platform. Similarly, when loading, after the goods are transported to the top of the lifting platform 1, the lifting platform 1 is adjusted to a position equal to the height of the freight car compartment to facilitate loading. When the lifting platform 1 rises and falls, the lifting frame 9 is driven to fit on the outside of the fixed frame 10 to limit the lifting platform 1 and ensure that the lifting platform 1 rises smoothly enough. When the device needs to be moved, the hydraulic cylinder 14 is started to drive the lifting plate 13 to descend. The lifting plate 13 then drives the moving wheels 15 to descend and reversely jack up the top structure. After that, the device can be conveniently pushed to move. The limiting column 16 inside the bottom cover 11 can limit the lifting plate 13 through the through hole 22 to improve the stability of the lifting plate 13 and the moving wheels 15 during the moving process and prevent the device from shaking. After moving to the designated loading and unloading platform, the hydraulic cylinder 14 is started to drive the lifting plate 13 to rise, thereby lowering the whole device and making the bottom cover 11 fit on the ground to support the device.

[0038] The above-described embodiments are only the preferred solutions of the utility model, and do not impose any form of limitation on the utility model. There are other variants and modifications without exceeding the technical solutions recorded in the claims.

[0039] In the description of the present utility model, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

Claims

1. A loading and unloading safety protection device, comprising a lifting platform (1), characterized in that: A group of protective frames (2) are movably connected to both sides of the top of the lifting platform (1), a bottom cover (11) is provided at the lower end of the lifting platform (1), a fixed frame (10) is fixedly connected to the top of the bottom cover (11), and a lifting mechanism for adjusting the height is provided at the bottom end of the lifting platform (1); The lifting mechanism comprises a lifting frame (9) and a hydraulic rod (18); the bottom end of the lifting platform (1) is fixedly connected to the lifting frame (9); both sides of the top end of the bottom cover (11) are fixedly connected to the hydraulic rod (18); and the output end of the hydraulic rod (18) is fixedly connected to the lifting platform (1).

2. A loading and unloading safety protection device according to claim 1, characterized in that: A reinforcing plate (17) is provided at the connection between the fixing frame (10) and the bottom cover (11).

3. A loading and unloading safety protection device according to claim 1, characterized in that: The fixed frame (10) is movably connected to the lifting frame (9), and the center line of the lifting frame (9) and the center line of the lifting platform (1) are on the same vertical plane.

4. A loading and unloading safety protection device according to claim 1, characterized in that: The lifting platform (1) is fixedly connected to a closed bin (4) inside, movable grooves (3) are arranged on both sides inside the lifting platform (1), a connecting plate (8) is movably connected inside the movable groove (3), the connecting plate (8) is fixedly connected to the protection frame (2), a metal mesh (21) is fixedly connected inside the protection frame (2), a threaded sleeve (6) is fixedly connected to one side of the connecting plate (8), a bidirectional thread shaft (5) is movably connected inside the movable groove (3), and the bidirectional thread shaft (5) passes through the closed bin (4) The interior of the closed warehouse (4) is provided with a driven sprocket (25), the driven sprocket (25) is fixedly sleeved on the bidirectional wire shaft (5), the bottom end of the lifting platform (1) is fixedly connected with a mounting groove (20), the inside of the mounting groove (20) is fixedly connected with a driving motor (19), the output end of the driving motor (19) is fixedly connected with a driving sprocket (24), the outside of the driving sprocket (24) is movably connected with a transmission chain (23), and the bottom end of one side of the protective frame (2) is fixedly connected with a supporting frame (7).

5. A loading and unloading safety protection device according to claim 4, characterized in that: The transmission chain (23) extends to the interior of the closed bin (4) and is movably connected to the driven sprocket (25), and the bidirectional thread shaft (5) is threadedly connected to the threaded sleeve (6).

6. A loading and unloading safety protection device according to claim 4, characterized in that: The support frame (7) is slidably connected to the lifting platform (1).

7. The loading and unloading safety protection device according to claim 1, characterized in that: The top of the bottom cover (11) is fixedly connected to a hydraulic cylinder (14); the output end of the hydraulic cylinder (14) extends to the inside of the bottom cover (11) and is fixedly connected to a lifting plate (13); the bottom of the bottom cover (11) is fixedly connected to a transverse plate (12); the top of the transverse plate (12) is fixedly connected to a limiting column (16); through holes (22) are provided on both sides of the lifting plate (13); and moving wheels (15) are fixedly connected to both sides of the bottom ends of the lifting plate (13).

8. A loading and unloading safety protection device according to claim 7, characterized in that: The limiting column (16) is slidably connected to the through hole (22), and the action wheels (15) at the bottom end of the lifting plate (13) are symmetrically arranged.

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