A covered vehicle used for material storage yards at port terminals
By designing a tarpaulin truck for the material yard of the port terminal, and using an automated rotating roller and support rod structure, the problems of inconvenience and easy damage on the material stack are solved, and the automatic expansion and coverage of the tarpaulin is realized, which improves the convenience and safety of operation.
Patent Information
- Application Number
- CN202310029290.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-01-09
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2043-01-09
AI Technical Summary
When covering the tarpaulin, the operator needs to manually climb the material pile and drag the tarpaulin, which makes the tarpaulin easily scratched by the material, making it inconvenient and laborious.
A tarpaulin truck for the port terminal material yard is designed, adopting two vehicle bodies and a support rod structure, and the rotating roller is driven by the driving member to automatically unroll the tarpaulin and the capping net to achieve automatic coverage and reduce the relative movement of the tarpaulin and material.
The automatic unfolding and covering of tarpaulin is realized, which reduces the risk of tarpaulin being cut, improves the convenience and safety of operation, and adapts to material piles of different heights.
Smart Images

Figure CN116177271B_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of tarpaulin unfolding devices, and in particular to a tarpaulin truck used for material storage yards at port terminals. Background Art
[0002] When materials such as coal ash, sand, and straw are piled at port terminals, it is generally necessary to cover the material piles with tarpaulins to reduce the possibility of dust and other emissions, thereby protecting the air environment of the port terminals.
[0003] When covering a material pile with a sheet, the operator needs to hold a corner of the sheet and then climb to the top of the material pile to drag the sheet onto the material pile, so that the sheet is unfolded and covers the material.
[0004] When the operator drags the tarpaulin, the tarpaulin comes into contact with the material and moves relative to it, which may cause the tarpaulin to be scratched by the material, so this needs to be improved. Summary of the Invention
[0005] The purpose of the present application is to provide a tarpaulin covering vehicle for use in a port terminal material yard, so as to reduce the possibility of the tarpaulin being scratched by the material during the covering process.
[0006] The application provides a tarpaulin truck for use in port terminal material yards that adopts the following technical solutions:
[0007] A tarpaulin truck for use in material yards at port terminals comprises two truck bodies, one of which is used to travel on one side of a material pile, and the other is used to travel on the other side of the material pile; each truck body is provided with an upwardly extending support rod, the upper ends of the two support rods are commonly connected to a mounting frame, and the mounting frame is located above the material pile; the mounting frame is rotatably provided with a rotating roller, and a tarpaulin is wound around the peripheral wall of the rotating roller; the mounting frame is provided with a driving member for driving the rotating roller to rotate.
[0008] By adopting the above technical solution, when it is necessary to cover a pile of materials with a tarpaulin, the vehicle body is manipulated to move from one end of the pile of materials toward the other end; at the same time, the driving member drives the rotating roller to rotate to unwind the tarpaulin, which is then automatically unfolded and placed over the pile of materials, making operation convenient and labor-saving. During the movement of the vehicle body, the driving member can drive the rotating roller to rotate to automatically unwind the tarpaulin, causing it to automatically fall onto the pile of materials, thereby reducing the possibility of the tarpaulin being dragged, thereby reducing the possibility of relative movement between the tarpaulin and the materials, and thus reducing the risk of the tarpaulin being scratched by the materials.
[0009] Optionally, the mounting frame is rotatably provided with a mounting roller, and a peripheral wall of the mounting roller is rolled up with a pressure covering net for covering the upper surface of the tarpaulin; the mounting roller is located above the rotating roller.
[0010] By adopting the above technical solution, when covering the tarpaulin, one end of the covering net can be pulled out and pressed tightly; when the vehicle body moves to cover the tarpaulin, the installation roller automatically rotates and unwinds the covering net, so that the covering net automatically covers the upper surface of the tarpaulin to press the tarpaulin and reduce the risk of the tarpaulin being blown off by the wind.
[0011] Optionally, sliding seats are provided between both ends of the mounting roller and the mounting frame, and each end of the mounting roller is connected to the mounting frame through the sliding seat; the sliding seat is slidingly connected to the mounting frame along the up and down directions; each end of the mounting roller is rotatably connected to the corresponding sliding seat around its own axis; the pressure covering net on the peripheral wall of the mounting roller abuts against the tarpaulin on the peripheral wall of the rotating roller.
[0012] By adopting the above technical solution, when the driving member drives the rotating roller to rotate to roll up the tarpaulin, the mounting roller can rotate synchronously to automatically roll up the covering net. Similarly, when the rotating roller rotates to unwind the tarpaulin, the mounting roller rotates synchronously to unwind the covering net, which helps to reduce the operation of pressing one end of the covering net, thereby facilitating and improving the convenience of covering the covering net. The covering net on the peripheral wall of the mounting roller and the tarpaulin on the peripheral wall of the rotating roller are always in contact, which helps to improve the consistency of the unrolled length of the covering net and the tarpaulin, thereby helping to reduce the possibility of the covering net and the tarpaulin being relatively moved due to the unrolled length of the covering net being less than the unrolled length of the tarpaulin, thereby reducing the possibility of the covering net being gathered due to the unrolled length of the covering net being greater than the unrolled length of the tarpaulin.
[0013] Optionally, the sliding seat is provided with an elastic member for driving it to move downward, and one end of the elastic member away from the sliding seat is connected to the mounting bracket.
[0014] By adopting the above technical solution, the elastic member exerts a downward force on the sliding seat, which is conducive to keeping the pressure cover net on the peripheral wall of the installation roller and the tarpaulin on the peripheral wall of the rotating roller in contact at all times, thereby reducing the possibility of the sliding seat getting stuck.
[0015] Optionally, the support rod includes a support cylinder connected to the vehicle body, a sliding rod slidably connected to the inner side wall of the support cylinder along the up and down directions, and an adjustment component for driving the sliding rod to move up and down; the mounting frame is connected to the sliding rod.
[0016] By adopting the above technical solution, the adjustment component can drive the sliding rod to move upward or downward to adjust the height of the mounting frame, thereby facilitating improvement of the applicability to material piles of different heights.
[0017] Optionally, the adjustment assembly includes an active roller rotatably connected to the support cylinder, a traction rope wound on the peripheral wall of the active roller, a fixed seat connected to the sliding rod body, and a rotating member for driving the active roller to rotate, and the outer peripheral wall of the support cylinder is penetrated by a clearance groove for the sliding of the fixed seat; the end of the traction rope away from the active roller is connected to the fixed seat; and the rotating member is connected to the support cylinder.
[0018] By adopting the above technical solution, the rotating member drives the active roller to rotate, and the active roller reels the traction rope, so that the fixed seat can move upward, thereby driving the sliding rod body to automatically move upward; when the rotating member drives the active roller to rotate in the opposite direction to unwind the traction rope, the sliding rod body automatically moves downward under the action of gravity.
[0019] Optionally, the adjustment assembly further includes a traction wheel rotatably connected to the fixed seat and a mounting seat connected to the upper end of the support cylinder; the end of the traction rope away from the active roller passes around the traction wheel and is connected to the mounting seat.
[0020] By adopting the above technical solution, when the active roller reels the traction rope, the traction wheel can drive the fixed seat and the sliding rod to move upward automatically. At the same time, the mounting seat can share part of the force, thereby reducing the force on the active roller and facilitating the rotation of the active roller.
[0021] Optionally, the active roller is coaxially connected to a connecting turbine, and the supporting cylinder is rotatably provided with a connecting worm that meshes with the connecting turbine; the output shaft of the rotating member is connected to the connecting worm.
[0022] By adopting the above technical solution, the rotating member drives the connecting worm to rotate, which in turn drives the connecting turbine to rotate, thereby driving the active roller to rotate. When the output shaft of the rotating member stops rotating, the connecting worm cooperates with the connecting worm to achieve self-locking of the active roller, thereby improving the stability of the sliding rod body's fixed position.
[0023] Optionally, the lower end of the support rod is rotatably connected to the vehicle body, and the axial direction of the rotating shaft of the support rod is arranged along the length direction of the mounting frame; the vehicle body is provided with a support assembly for driving the support rod to rotate.
[0024] By adopting the above technical solution, when the tarpaulin needs to cover the end of the material pile, the support assembly drives the support rod to rotate downward at the starting position, so that the mounting frame approaches the ground. Then, the support assembly drives the support rod to rotate upward, while the rotating roller unwinds the tarpaulin, so that the tarpaulin automatically covers the starting end of the material pile from bottom to top. When the vehicle body moves to the end of the material pile, the support assembly drives the support rod to rotate downward in the opposite direction, so that the mounting frame moves toward the ground, automatically covering the tarpaulin at the end of the material pile. The support rod is rotatably connected to the vehicle body, and the support assembly drives the support rod to rotate, facilitating the tarpaulin covering both ends of the material pile, thereby reducing the need to drag the tarpaulin and the possibility of the tarpaulin being scratched. Furthermore, after the tarpaulin is covering the material pile, the support assembly drives the support rod to rotate, moving the mounting rod toward the ground, allowing the mounting rod to press against the corresponding end of the tarpaulin, thereby reducing the risk of the tarpaulin being blown away by the wind.
[0025] Optionally, the support assembly includes a rotating rod rotatably connected to the vehicle body, a telescopic connecting member rotatably connected to the rotating rod, and a telescopic support member rotatably connected to the vehicle body, and the rotating axis of the rotating rod is coaxial with the rotating axis of the support rod; the end of the telescopic support member away from the vehicle body is rotatably connected to the rotating rod, and the end of the telescopic connecting member away from the rotating rod is rotatably connected to the support rod.
[0026] By adopting the above technical solution, the telescopic connecting member, the telescopic support member, and the rotating rod cooperate with each other, which is conducive to increasing the rotation range of the support rod, thereby facilitating the rotation of the support rod from the ground position on one side of the material pile to the ground position on the other side of the material pile, so as to cover the positions at both ends of the material pile with tarpaulin.
[0027] In summary, this application includes at least one of the following beneficial technical effects:
[0028] 1. During the movement of the vehicle, the driving member can drive the rotating roller to rotate, so that the sheet is automatically unwound and falls automatically onto the material pile, which helps to reduce the possibility of the sheet being dragged, thereby reducing the possibility of relative movement between the sheet and the material, and thus reducing the risk of the sheet being scratched by the material;
[0029] 2. When the vehicle body moves to cover the sheet, the mounting roller automatically rotates and unwinds the covering net, so that the covering net automatically covers the upper surface of the sheet to press the sheet tightly and reduce the risk of the sheet being blown off by the wind;
[0030] 3. The supporting cylinder, sliding rod and adjustment assembly cooperate with each other to facilitate the adjustment of the height of the mounting frame, thereby improving the applicability to material piles of different heights;
[0031] 4. The telescopic connector, the telescopic support and the rotating rod cooperate with each other, which is conducive to increasing the rotation range of the support rod, so as to cover the two ends of the material pile with tarpaulin. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 It is a schematic diagram of the overall structure of a tarpaulin truck used for material storage yards at port terminals according to an embodiment of the present application.
[0033] Figure 2 yes Figure 1 Enlarged view of part A in .
[0034] Figure 3 It is a schematic diagram used to show the structure of the regulating component.
[0035] Figure 4 yes Figure 3 Enlarged view of part B in .
[0036] In the figure, 1. vehicle body; 11. support assembly; 111. rotating rod; 112. telescopic connecting member; 113. telescopic supporting member; 2. support rod; 21. supporting cylinder; 211. yield groove; 22. sliding rod body; 23. adjustment assembly; 231. active roller; 232. traction rope; 233. fixed seat; 234. rotating member; 235. traction wheel; 236. mounting seat; 237. guide wheel; 3. mounting frame; 31. rotating roller; 311. tarpaulin; 32. mounting roller; 321. covering net; 33. sliding groove; 331. sliding seat; 3311. elastic member; 34. driving member; 4. connecting assembly; 41. connecting turbine; 42. connecting worm. DETAILED DESCRIPTION
[0037] The following is combined with Figure 1 -Attached Figure 4 , further details of this application are given.
[0038] A covered vehicle used in material storage yards at ports and terminals, Figure 1, including two car bodies 1, one of which is used to be placed on one side of the material pile, and the other car body 1 is used to be placed on the other side of the material pile. Both car bodies 1 are provided with a power system for the car bodies 1 to move on the ground. Each car body 1 is provided with a support rod 2, and the support rod 2 includes a support cylinder 21, a sliding rod 22 and an adjustment assembly 23. One end of the support cylinder 21 is rotatably connected to the upper surface of the car body 1 through a rotating shaft; the car body 1 is provided with a support assembly 11 for supporting the support cylinder 21; the support cylinder 21 is extended on one end away from the car body 1. One end of the sliding rod 22 is inserted into the support cylinder 21 and is slidably connected to the inner side wall of the support cylinder 21 in the up and down directions; the adjustment assembly 23 is used to drive the sliding rod 22 to move upward or downward to adjust the height of the upper end of the sliding rod 22. The upper ends of the two sliding rods 22 are welded and fixed with a mounting frame 3.
[0039] Reference Figure 1 and Figure 2 The mounting frame 3 is equipped with a rotating roller 31 and a mounting roller 32. The lengths of the rotating roller 31 and the mounting roller 32 are arranged along the length of the mounting frame 3. The mounting roller 32 is located above the rotating roller 31. Both ends of the rotating roller 31 are rotatably connected to the mounting frame 3 via bearings. A tarpaulin 311 is wound around the circumference of the rotating roller 31. A sliding groove 33 is formed at each end of the mounting roller 32 on the mounting frame 3. The sliding groove 33 extends in the vertical direction. A sliding seat 331 is slidably connected to the inner side wall of the sliding groove 33. Each end of the mounting roller 32 is rotatably connected to the corresponding sliding seat 331 via a bearing. A capping net 321 (the mesh is not shown in the figure) is wound around the circumference of the mounting roller 32. The capping net 321 on the circumference of the mounting roller 32 abuts against the upper portion of the circumference of the rotating roller 31. The capping net 321 includes a net rope.
[0040] Reference Figure 2 The mounting frame 3 is provided with a driving member 34 at one end of the rotating roller 31, and the driving member 34 includes a motor; the driving member 34 is fixed to the mounting frame 3 by screws, and the output shaft of the driving member 34 is connected to the rotating roller 31 to drive the rotating roller 31 to rotate, so that the rotating roller 31 can unwind the tarpaulin 311 so that the tarpaulin 311 can automatically cover the material pile; at the same time, the mounting roller 32 automatically rotates synchronously so that the mounting roller 32 can automatically unwind the covering net 321, so that the covering net 321 can automatically cover the upper surface of the tarpaulin 311 to press the tarpaulin 311.
[0041] Reference Figure 2The sliding seat 331 is provided with an elastic member 3311, which comprises a spring. One end of the elastic clip abuts the upper surface of the sliding seat 331, while the other end extends upward and abuts the mounting bracket 3. The elastic member 3311 is in a compressed state, exerting a downward force on the sliding seat 331, thereby maintaining contact between the covering mesh 321 on the peripheral wall of the mounting roller 32 and the sheeting 311 on the peripheral wall of the rotating roller 31.
[0042] Reference Figure 1 and Figure 3 The axial direction of the rotating shaft of the support cylinder 21 is arranged along the length direction of the mounting frame 3. The support assembly 11 includes a rotating rod 111, a telescopic connection member 112, and a telescopic support member 113. The rotating rod 111 is located between the support cylinder 21 and the vehicle body 1. One end of the rotating rod 111 is rotatably connected to the vehicle body 1, and the rotating shaft of the rotating rod 111 is coaxially arranged with the rotating shaft of the support cylinder 21. The telescopic connection member 112 is located between the rotating rod 111 and the support cylinder 21, and the telescopic support member 113 is located between the rotating rod 111 and the vehicle body 1; the telescopic connection member 112 and the telescopic support member 113 both include hydraulic cylinders.
[0043] Reference Figure 3 The cylinder of the telescopic support member 113 is hinged to the upper surface of the vehicle body 1, and the piston rod of the telescopic support member 113 is hinged to the rotating rod 111. The cylinder of the telescopic connector 112 is hinged to the rotating rod 111, and the piston rod of the telescopic connector 112 is hinged to the support cylinder 21. When the piston rod of the telescopic connector 112 is extended, it can drive the support cylinder 21 to rotate away from the rotating rod 111. When the piston rod of the telescopic support member 113 is extended, the rotating rod 111 rotates away from the vehicle body 1, driving the support cylinder 21 to rotate further, thereby facilitating the expansion of the rotation range of the support cylinder 21.
[0044] Reference Figure 3 The adjustment assembly 23 includes a driving roller 231, a traction rope 232, a fixed seat 233, a rotating member 234, a traction wheel 235, a mounting seat 236 and a guide wheel 237. The guide wheel 237 is rotatably connected to the outer side wall of the upper end of the support cylinder 21 through a bearing. The driving roller 231 is rotatably connected to the lower end of the support cylinder 21 through a bearing; the mounting seat 236 is welded and fixed to the outer side wall of the upper end of the support cylinder 21. The outer side wall of the support cylinder 21 is provided with a clearance groove 211 along the upper and lower sides, and the clearance groove 211 is connected to the interior of the support cylinder 21. The fixed seat 233 is located in the clearance groove 211, and the fixed seat 233 is welded and fixed to the side wall of the lower end of the sliding rod body 22; the traction wheel 235 is rotatably connected to the fixed seat 233 through a bearing.
[0045] Reference Figure 3The traction rope 232 comprises a steel wire rope; one end of the traction rope 232 is spirally wound around the peripheral wall of the driving roller 231, and the other end is sequentially passed around the guide pulley 237 and the traction pulley 235 before being fixedly connected to the mounting base 236 via a steel wire rope clip. The rotating member 234 comprises a motor and is connected to the support cylinder 21 via bolts. A connecting assembly 4 is connected between the rotating member 234 and the driving roller 231, allowing the rotating member 234 to drive the driving roller 231 to rotate, thereby allowing the driving roller 231 to reel in the traction rope 232, thereby causing the fixed base 233 and the sliding rod 22 to move upward.
[0046] Reference Figure 4 The connecting assembly 4 includes a connecting worm gear 41 and a connecting worm gear 42. The connecting worm gear 41 is coaxially keyed to the active roller 231; the connecting worm gear 42 meshes with the connecting worm gear 41, and both ends of the connecting worm gear 42 are rotationally connected to the support cylinder 21. The output shaft of the rotating member 234 is connected to the connecting worm gear 42 to drive the connecting worm gear 42 to rotate, thereby driving the connecting worm gear 42 and the active roller 231 to rotate. When the connecting worm gear 42 stops rotating, the active roller 231 automatically remains in a stopped state due to the self-locking effect of the connecting worm gear 41 and the connecting worm gear 42.
[0047] The implementation principle of the embodiment of this application is:
[0048] When it is necessary to cover the material pile with tarpaulin 311, the operator controls the vehicle body 1 to move the vehicle body 1 to the position of one end of the material pile; then, the telescopic connecting member 112 drives the supporting cylinder 21 to rotate, so that the mounting frame 3 moves upward from the position close to the ground; at the same time, the driving member 34 drives the rotating roller 31 to rotate to unroll the tarpaulin 311, so that the tarpaulin 311 can be automatically placed on the material pile; when the mounting frame 3 moves to the position above the material pile, the vehicle body 1 moves toward the other end of the material pile to continue to cover the tarpaulin 311 on the top of the material; when the vehicle body 1 moves to the end position of the other end of the material pile, the vehicle body 1 stops moving, and the telescopic support member 113 drives the rotating rod 111 to rotate away from the vehicle body 1, so that the supporting cylinder 21 further rotates, thereby causing the mounting frame 3 to move toward the ground, so that the tarpaulin 311 continues to cover the position of the corresponding end of the material pile, thereby completing the covering operation of the tarpaulin 311.
[0049] During the process of covering the tarpaulin 311 , the driving member 34 drives the rotating roller 31 to rotate to automatically unwind the tarpaulin 311 , which helps to reduce the possibility of the tarpaulin 311 being dragged, thereby helping to reduce the possibility of the tarpaulin 311 being scratched by the material.
[0050] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.
Claims
1. A covered vehicle for use in a port terminal material yard, characterized by: The invention comprises two vehicle bodies (1), wherein one of the vehicle bodies (1) is used for traveling on one side of a material pile, and the other vehicle body (1) is used for traveling on the other side of the material pile; each vehicle body (1) is provided with a support rod (2) extending upward, and the upper ends of the two support rods (2) are commonly connected to a mounting frame (3), and the mounting frame (3) is located above the material pile; the mounting frame (3) is rotatably provided with a rotating roller (31), and a tarpaulin (311) is wound around the peripheral wall of the rotating roller (31); the mounting frame (3) is provided with a driving member (34) for driving the rotating roller (31) to rotate; The mounting frame (3) is rotatably provided with a mounting roller (32), and a covering net (321) for covering the upper surface of the tarpaulin (311) is rolled up on the peripheral wall of the mounting roller (32); the mounting roller (32) is located above the rotating roller (31); A sliding seat (331) is provided between both ends of the mounting roller (32) and the mounting frame (3); each end of the mounting roller (32) is connected to the mounting frame (3) via the sliding seat (331); the sliding seat (331) is slidingly connected to the mounting frame (3) in the up-down direction; each end of the mounting roller (32) is rotationally connected to the corresponding sliding seat (331) around its own axis; the pressure cover net (321) on the peripheral wall of the mounting roller (32) abuts against the tarpaulin (311) on the peripheral wall of the rotating roller (31); The sliding seat (331) is provided with an elastic member (3311) for driving it to move downward, and one end of the elastic member (3311) away from the sliding seat (331) is connected to the mounting frame (3).
2. The tarpaulin covered vehicle for use in port and terminal material storage yards according to claim 1, characterized in that: The support rod (2) comprises a support cylinder (21) connected to the vehicle body (1), a sliding rod (22) slidably connected to the inner side wall of the support cylinder (21) in the up-down direction, and an adjustment component (23) for driving the sliding rod (22) to move up and down; the mounting frame (3) is connected to the sliding rod (22).
3. The tarpaulin covered vehicle for use in port and terminal material storage yards according to claim 2, characterized in that: The adjustment assembly (23) includes an active roller (231) rotatably connected to the support cylinder (21), a traction rope (232) wound on the peripheral wall of the active roller (231), a fixed seat (233) connected to the sliding rod (22), and a rotating member (234) for driving the active roller (231) to rotate. The outer peripheral wall of the support cylinder (21) is provided with a clearance groove (211) for the fixed seat (233) to slide. The end of the traction rope (232) away from the active roller (231) is connected to the fixed seat (233); and the rotating member (234) is connected to the support cylinder (21).
4. The tarpaulin vehicle for use in port and terminal material storage yards according to claim 3, characterized in that: The adjustment assembly (23) further comprises a traction wheel (235) rotatably connected to the fixed seat (233) and a mounting seat (236) connected to the upper end of the support cylinder (21); an end of the traction rope (232) away from the active roller (231) passes around the traction wheel (235) and is connected to the mounting seat (236).
5. The tarpaulin covered vehicle for use in port and terminal material storage yards according to claim 3, characterized in that: The active roller (231) is coaxially connected to a connecting turbine (41), and the supporting cylinder (21) is rotatably provided with a connecting worm (42) meshing with the connecting turbine (41); the output shaft of the rotating member (234) is connected to the connecting worm (42).
6. The tarpaulin covered vehicle for use in port and terminal material storage yards according to claim 1, characterized in that: The lower end of the support rod (2) is rotatably connected to the vehicle body (1), and the axial direction of the rotating shaft of the support rod (2) is arranged along the length direction of the mounting frame (3); the vehicle body (1) is provided with a support assembly (11) for driving the support rod (2) to rotate.
7. The tarpaulin vehicle for use in port and terminal material storage yards according to claim 6, characterized in that: The support assembly (11) comprises a rotating rod (111) rotatably connected to the vehicle body (1), a telescopic connecting member (112) rotatably connected to the rotating rod (111), and a telescopic supporting member (113) rotatably connected to the vehicle body (1), wherein the rotating axis of the rotating rod (111) is coaxial with the rotating axis of the supporting member (2); an end of the telescopic supporting member (113) away from the vehicle body (1) is rotatably connected to the rotating rod (111), and an end of the telescopic connecting member (112) away from the rotating rod (111) is rotatably connected to the supporting member (2).
Citation Information
Patent Citations
Automatic tarpaulin covering device
CN114030922A
Rain -proof screen panel of column goods
CN207141863U