A polishing device for container processing

Abstract

The present invention relates to the technical field of polishing equipment. The present invention discloses a polishing device for container processing, which includes a bracket, a polishing wheel and a container frame. The bracket is arranged on the outside of the container frame. A main electric cylinder is arranged at the center of the bracket. A mounting plate is fixedly connected to the free end of the main electric cylinder. A plurality of first linear modules are fixedly arranged on the mounting plate. The first linear modules are driven and connected to a polishing machine. The polishing machine is driven and connected to the polishing wheel. The container frame is fixed to a supporting plate. The supporting plate is slidably connected to the container linear module. Compared with the prior art, the present invention has the following advantages: multiple welding points of the container frame can be polished at the same time, and it has higher work efficiency. The polishing wheel can be folded at a certain angle and can be extended into the gap of the container frame. The present invention can automatically align with the frame of the container to be polished, and adjust the position of each polishing wheel according to the contour of the container frame to be polished to improve work efficiency and polishing quality.

Description

Technical Field

[0001] The invention relates to the technical field of polishing equipment, and in particular to a polishing device for container processing. Background Art

[0002] Current merchandise display containers usually use a frame structure formed by welding multiple square steels, and the surface of the frame structure is covered with decorative panels and pallets to form a container. In order to ensure that the paint surface at the welding points has good adhesion in the subsequent sandblasting and coloring process of the container production and processing, the welding points of the frame structure need to be ground and polished. In addition, during normal use of the finished container, the user's hands are prone to scratches and bumps against the welding points. Polishing and grinding the welding points can avoid injuries to the user.

[0003] Usually square steel connections are right-angled, and general containers have multi-layer structures, so there are many right-angle welding points and there is not enough working space around them. It is difficult for general equipment to handle them. If manual polishing is used, it is difficult to improve work efficiency due to the large number of welding points. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the container frame has many welding points and is difficult to be polished by automated equipment, and the manual polishing efficiency is low. A polishing device for container processing is provided.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: a polishing device for container processing, which includes a bracket, a polishing wheel and a container frame. The bracket is arranged on the outside of the container frame. A main electric cylinder is provided at the center of the bracket. The free end of the main electric cylinder is fixedly connected with a mounting plate. The mounting plate is fixed with a plurality of first linear modules. The first linear modules are driven and connected with a polishing machine. The polishing machine is driven and connected with the polishing wheel. The container frame is fixed to a supporting plate. The supporting plate is slidably connected to the container linear module.

[0006] The first linear module includes two groups, one set horizontally and the other set vertically, and the ends of the two groups are vertically fixedly connected to each other. The first linear module is driven by a passive guide rail, and a pair of passive guide rails that intersect vertically are slidably connected together and are provided with an orthogonal adjustment slider.

[0007] An extension rod is arranged at the center of the mounting plate, an eccentric electric cylinder is arranged on the top, a centering assembly is arranged at the end of the extension rod, a sliding sleeve is arranged on the extension rod sliding sleeve, the free end of the eccentric electric cylinder is connected with the sliding sleeve, a slip ring is arranged on the side of the sliding sleeve that is rotatably connected toward the end of the extension rod, a deflection motor is fixedly arranged at the end of the extension rod, an eccentric cam is arranged at the power end of the deflection motor, an eccentric rotating shaft is arranged on the outer side of the eccentric cam, the centering assembly is rotatably connected with the eccentric rotating shaft, an eccentric guide rod is arranged on the other side where the eccentric rotating shaft is connected to the centering assembly, and the eccentric distance connecting rod is hingedly connected on the outer side of the slip ring, and the end of the eccentric distance connecting rod is hingedly connected to the end of the eccentric guide rod.

[0008] Furthermore, two mutually perpendicular auxiliary slide blocks are fixedly connected to the bottom of the orthogonal adjustment slide block, and the auxiliary slide blocks are slidably connected to the passive guide rail.

[0009] Furthermore, the centering assembly includes a cross bracket and four spring pistons. The spring pistons are slidingly connected to the end of the cross bracket. The spring pistons are arranged in a cross shape. A counterweight is provided at the bottom of the cross bracket. An end plate is provided at the free end of the spring piston. Bevel pads are provided on both sides of the end plate. The end plate is provided with a magnetic scale extending toward the center of the cross bracket. A plurality of magnetic encoders cooperating with the magnetic scale are provided at the end of the cross bracket.

[0010] Furthermore, a first steering gear is provided at the outer center of the cross bracket, a second steering gear is provided on the outer fixed frame of the first steering gear, a first swing arm is connected to the output end of the first steering gear, both ends of the first swing arm are hingedly connected to a first push rod, a second steering gear output end is connected to the second swing arm, both ends of the second swing arm are hingedly connected to a second push rod, and the ends of the first push rod and the second push rod are respectively rotatably connected to the outer roots of a pair of coaxial spring pistons.

[0011] Furthermore, the orthogonal adjustment slider is connected with a docking bracket, the docking bracket is fixed with a polishing machine deflection bracket, the side of the polishing machine is provided with a connecting arm, the end of the connecting arm is hingedly connected to the polishing machine deflection bracket, one end of the polishing machine deflection bracket is provided with a second linear module, the second linear module drives a deflection slider, the deflection slider is hingedly connected with a pull rod, the end of the pull rod is hingedly connected with a bearing, and the polishing grinding wheel is rotatably connected to the bearing.

[0012] Furthermore, a polishing motor is fixedly connected to the side of the polishing machine, the output shaft of the polishing motor extends into the interior of the polishing machine and is connected to a first gear, the polishing wheel drive shaft extends into the interior of the polishing machine and is connected to a second gear, and the first gear is meshed with the second gear.

[0013] Furthermore, an auxiliary bracket is provided on the side of the first linear module, and a guide rod is connected to the auxiliary bracket. The outer periphery of the main electric cylinder is fixedly connected with a guide bracket, and the guide bracket is provided with a guide hole matching the guide rod, and the guide rod is slidably connected to the guide hole.

[0014] Furthermore, the container linear module drive is provided with a supporting slider, a supporting plate is fixedly arranged on the top of the supporting slider, first limit blocks are provided at both ends of the supporting plate to limit the end of the container frame, and second limit blocks are provided on both sides of the supporting plate to limit the side of the container frame.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] The structure of the present invention is adapted to the container frame and can grind multiple welding points of the container frame at the same time, thus having high working efficiency.

[0017] The polishing wheel of the invention can be folded at a certain angle and can be extended into the gap of the container frame to directly polish the right-angle welding points of the frame.

[0018] The polishing wheel of the present invention can be adjusted in position in the vertical and horizontal directions according to the spacing between container frames, and can be used to polish container frames with different layer heights and different widths.

[0019] The present invention can automatically align with the frame of the container to be polished, and sense the outline and position of the container frame. By cooperating with the structure for adjusting the position of the polishing grinding wheel, the working efficiency and the polishing quality can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a schematic diagram of the position of the master electric cylinder of the present invention.

[0022] Figure 3 It is a structural schematic diagram of the container frame of the present invention.

[0023] Figure 4 It is a schematic structural diagram of the support of the present invention.

[0024] Figure 5 It is a structural schematic diagram of the connection between the first linear module and the bracket of the present invention.

[0025] Figure 6 It is a structural schematic diagram of the first linear module of the present invention.

[0026] Figure 7 It is a schematic diagram of the orthogonal adjustment slider after movement of the present invention.

[0027] Figure 8 It is a structural schematic diagram of the orthogonal adjustment slider of the present invention.

[0028] Fig. 9 It is a structural schematic diagram of the polishing wheel after the position of the present invention is moved.

[0029] Fig.10It is a structural schematic diagram of the deflection bracket of the polishing machine of the present invention.

[0030] Fig.11 It is a schematic diagram of the structure inside the polishing machine of the present invention.

[0031] Fig.12 It is a schematic diagram of the structure of the polishing machine of the present invention after deflection and folding.

[0032] Fig.13 It is a structural schematic diagram of the centering component of the present invention.

[0033] Fig.14 It is a structural schematic diagram of the eccentric cam of the present invention.

[0034] Fig.15 It is a schematic structural diagram of the first swing arm and the second swing arm of the present invention.

[0035] Fig.16 It is a schematic diagram of the position of the magnetic encoder of the present invention.

[0036] As shown in the figure: 1. bracket, 2. main electric cylinder, 3. polishing machine, 4. polishing wheel, 5. container frame, 6. guide bracket, 7. guide hole, 8. mounting plate, 9. guide rod, 10. auxiliary bracket, 11. first linear module, 12. passive guide rail, 13. orthogonal adjustment slider, 14. docking bracket, 15. polishing machine deflection bracket, 16. second linear module, 17. deflection slider, 18. pull rod, 19. bearing, 20. polishing motor, 21. connecting arm, 22. first gear, 23. second gear, 24. auxiliary slider, 25. container linear module, 26. supporting slider, 27. Support plate, 28. First limit block, 29. Second limit block, 30. Centering assembly, 31. Extension rod, 32. Eccentric electric cylinder, 33. Sliding sleeve, 34. Slip ring, 35. Deflection motor, 36. Cross bracket, 37. Spring piston, 38. Counterweight, 39. End plate, 40. Inclined bushing, 41. Eccentric distance connecting rod, 42. Eccentric cam, 43. Eccentric guide rod, 44. Eccentric rotating shaft, 45. First servo, 46. Second servo, 47. First swing arm, 48. Second swing arm, 49. First push rod, 50. Second push rod, 51. Magnetic encoder, 52. Magnetic scale. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0038] Combined with Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 and attached Figure 5A polishing device for container processing, comprising a bracket 1, a polishing grinding wheel 4 and a container frame 5, the bracket 1 is arranged on the outside of the container frame 5, a main electric cylinder 2 is arranged in the center of the bracket 1, a mounting plate 8 is fixedly connected to the free end of the main electric cylinder 2, a plurality of first linear modules 11 are fixedly arranged on the mounting plate 8, the first linear module 11 is drivingly connected to a polishing machine 3, the polishing machine 3 is drivingly connected to the polishing grinding wheel 4, the container frame 5 is fixed to a supporting plate 27, the supporting plate 27 is slidably connected to the container linear module 25, an auxiliary bracket 10 is arranged on the side of the first linear module 11, the auxiliary bracket 10 is connected to a guide rod 9, the outer periphery of the main electric cylinder 2 is fixedly connected to a guide bracket 6, the guide bracket 6 is provided with a guide hole 7 matching the guide rod 9, and the guide rod 9 is slidably connected to the guide hole 7.

[0039] The present invention pushes the polishing wheel 4 into the gap of the container frame 5 through the main electric cylinder 2, and polishes the welding point through the polishing wheel 4. During this process, the main electric cylinder 2 performs a small reciprocating motion to assist the polishing wheel 4 in polishing. The present invention has multiple motors, electric cylinders and magnetic encoders. During specific implementation, a corresponding control computer should be equipped according to actual conditions.

[0040] Combined with Figure 5 , Attachment Figure 6 , Attachment Figure 7 , Attachment Figure 8 and attached Fig. 9 The first linear module 11 includes two groups arranged horizontally and vertically, and the ends of the two groups are fixedly connected vertically to each other. The first linear module 11 is driven by a passive guide rail 12. A pair of passive guide rails 12 that intersect each other vertically are slidably connected together with an orthogonal adjustment slider 13. The bottom of the orthogonal adjustment slider 13 is fixedly connected with two mutually perpendicular auxiliary sliders 24, and the auxiliary slider 24 is slidably connected to the passive guide rail 12.

[0041] Reference Fig. 9 The position of the orthogonal adjustment slider 13 is changed by driving the first linear module 11 to adjust the position of the passive guide rail 12. Since the two passive guide rails 12 connected to the orthogonal adjustment slider 13 are perpendicular to each other, the first linear module 11 connected to the passive guide rails 12 can be adjusted to change the position of the orthogonal adjustment slider 13 in two vertical directions respectively, thereby adjusting the distance between the polishing wheel 4 and the weld to be polished.

[0042] Combined with Fig.13 and attached Fig.14An extension rod 31 is arranged at the center of the mounting plate 8, an eccentric electric cylinder 32 is arranged on the top, a centering component 30 is arranged at the end of the extension rod 31, a sliding sleeve 33 is arranged on the sliding sleeve of the extension rod 31, the free end of the eccentric electric cylinder 32 is connected with the sliding sleeve 33, a slip ring 34 is arranged on the side of the sliding sleeve 33 that is rotatably connected toward the end of the extension rod 31, a deflection motor 35 is fixedly arranged at the end of the extension rod 31, an eccentric cam 42 is arranged at the power end of the deflection motor 35, an eccentric rotating shaft 44 is arranged on the outside of the eccentric cam 42, the centering component 30 is rotatably connected with the eccentric rotating shaft 44, an eccentric guide rod 43 is arranged on the other side where the eccentric rotating shaft 44 is connected to the centering component 30, and the eccentric cam 42 is slidably connected, an eccentric distance connecting rod 41 is hingedly connected on the outside of the slip ring 34, and the end of the eccentric distance connecting rod 41 is hingedly connected to the end of the eccentric guide rod 43.

[0043] In the above structure, the movement of the free end of the eccentric electric cylinder 32 can drive the sliding sleeve 33 to slide on the extension rod 31, thereby pulling the eccentric guide rod 43 through the eccentric distance connecting rod 41, so that the eccentric rotating shaft 44 is away from or close to the rotation axis of the eccentric cam 42. When the deflection motor 35 rotates, the eccentric cam 42 can be rotated. The above structure can realize the adjustment of the center point position of the centering component 30.

[0044] Combined with Fig.15 and attached Fig.16 The centering assembly 30 includes a cross bracket 36 and four spring pistons 37. The spring pistons 37 are slidably connected to the end of the cross bracket 36. The spring pistons 37 are arranged in a cross shape. A counterweight 38 is provided at the bottom of the cross bracket 36. An end plate 39 is provided at the free end of the spring piston 37. Inclined pads 40 are provided on both sides of the end plate 39. The end plate 39 is provided with a magnetic scale 52 extending to the center of the cross bracket 36. A plurality of magnetic encoders 51 matching the magnetic scale 52 are provided at the end of the cross bracket 36. A first steering gear 45 is provided at the center of the outer side of the cross bracket 36. A second steering gear 46 is fixedly mounted on the outer side of the first steering gear 45. A first swing arm 47 is connected to the output end of the first steering gear 45. Both ends of the first swing arm 47 are hingedly connected with a first push rod 49. The output end of the second steering gear 46 is connected with a second swing arm 48. Both ends of the second swing arm 48 are hingedly connected with a second push rod 50. The ends of the first push rod 49 and the second push rod 50 are respectively rotatably connected to the outer roots of a pair of coaxial spring pistons 37.

[0045] By controlling the main electric cylinder 2, the above structure is made to approach the side of the container frame 5, and by controlling the first servo 45 and the second servo 46 respectively, each end plate 39 can be extended, and finally the inclined pads 40 on both sides of the end plate 39 contact the edge of the container frame 5 and stop displacement, and the first servo 45 and the second servo 46 are stopped after the contact between the inclined pads 40 and the edge of the container frame 5 is detected by detecting the feedback data of the magnetic encoder 51. Since there is a certain delay between the feedback of the magnetic encoder 51 and the control of the first servo 45 and the second servo 46, the spring piston 37 can be compressed to a certain extent, allowing the first servo 45 and the second servo 46 to continue to rotate slightly before stopping, and at the same time, the elastic force of the spring piston 37 can also ensure that the inclined pads 40 are in full contact with the edge of the container frame 5.

[0046] When the first servo 45 and the second servo 46 stop, the readings of each magnetic encoder 51 are read by an external control computer. In the structure described above, the position of the center of the cross bracket 36 is adjusted by the eccentric electric cylinder 32 and the deflection motor 35 so that the readings of the magnetic encoders 51 in the same direction are equal. At this time, the width and height of the container frame 5 and the relative position to the device can be obtained through the data of the magnetic encoder 51.

[0047] Before grinding the container frame 5, it is necessary to align each polishing wheel 4 of the present invention with the welding points at the corners of the container frame 5. According to the previous description, the present invention can sense the width and height of the container frame 5 to be ground, and can judge the right-angle welding position of the container frame 5 based on these data, thereby changing the polishing wheel 4 for welding.

[0048] When the polishing wheel 4 is adjusted to a suitable position, the first servo 45 and the second servo 46 are controlled to retract the end plate 39. The dimensions of the components of the present invention are set so that the projected area of ​​the rectangular area formed by the retracted end plates 39 is smaller than the projected area of ​​the rectangle formed by the polishing wheels 4. At this time, the main electric cylinder 2 is extended to allow the polishing wheel 4 to contact the area to be polished for polishing.

[0049] Combined with Fig.10 , Attachment Fig.11 and attached Fig.12 The orthogonal adjustment slider 13 is connected with a polishing machine deflection bracket 15, and a connecting arm 21 is provided on the side of the polishing machine 3. The end of the connecting arm 21 is hingedly connected to the polishing machine deflection bracket 15. A second linear module 16 is provided at one end of the polishing machine deflection bracket 15. The second linear module 16 drives a deflection slider 17. The deflection slider 17 is hingedly connected with a pull rod 18, and the end of the pull rod 18 is hingedly connected with a bearing 19. The polishing grinding wheel 4 is rotatably connected with the bearing 19. The side of the polishing machine deflection bracket 15 is fixedly connected with a docking bracket 14, and the docking bracket 14 is fixedly connected to the orthogonal adjustment slider 13.

[0050] By controlling the second linear module 16 to change the deflection slider 17, the polishing machine 3 and the polishing wheel 4 can be rotated as a whole around the hinge of the connecting arm 21. The above structure realizes the overall flipping and storage of the polishing machine 3 and the polishing wheel 4, which can reduce their projection area on the side of the container frame 5 to a certain extent, avoiding collision when they extend into the gap of the container frame 5.

[0051] Combined with Fig.11 A polishing motor 20 is fixedly connected to the side of the polishing machine 3, and the output shaft of the polishing motor 20 extends into the interior of the polishing machine 3 and is connected to a first gear 22. The driving shaft of the polishing wheel 4 extends into the interior of the polishing machine 3 and is connected to a second gear 23. The first gear 22 is meshed with the second gear 23.

[0052] The present invention realizes electric driving of the polishing grinding wheel 4 through the above structure, and the structure can prevent the polishing motor 20 and the polishing machine 3 casing from colliding with the container frame 5.

[0053] Combined with Figure 3 The container linear module 25 is driven by a supporting slider 26, a supporting plate 27 is fixed on the top of the supporting slider 26, first limit blocks 28 are provided at both ends of the supporting plate 27 to limit the end of the container frame 5, and second limit blocks 29 are provided on both sides of the supporting plate 27 to limit the side of the container frame 5.

[0054] For a container frame 5 with a multi-layer structure, the above structure can be used to align frames of different layers with the polishing wheel 4 in sequence, and when the welding points of one layer are processed, the welding points of the next layer can be moved to the working position.

[0055] The present invention and its implementation methods are described above, and such description is not restrictive, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by it, and does not deviate from the purpose of the invention, and does not creatively design a structure and implementation method similar to the technical solution, they should all fall within the protection scope of the present invention.

Claims

1. A polishing device for container processing, comprising a bracket (1), a polishing wheel (4) and a container frame (5), wherein the bracket (1) is arranged outside the container frame (5), a main electric cylinder (2) is arranged at the center of the bracket (1), a mounting plate (8) is fixedly connected to the free end of the main electric cylinder (2), a plurality of first linear modules (11) are fixedly arranged on the mounting plate (8), the first linear modules (11) are drivingly connected to a polishing machine (3), the polishing machine (3) is drivingly connected to the polishing wheel (4), the container frame (5) is fixed to a supporting plate (27), the supporting plate (27) is slidably connected to the container linear module (25), and the characteristics are: The first linear module (11) comprises two groups, one arranged horizontally and the other arranged vertically, and the ends of the two groups are vertically fixedly connected to each other. The first linear module (11) is driven by a passive guide rail (12), and a pair of passive guide rails (12) vertically intersecting each other are slidably connected together and are provided with an orthogonal adjustment slider (13); An extension rod (31) is arranged at the center of the mounting plate (8), an eccentric electric cylinder (32) is arranged at the top, a centering assembly (30) is arranged at the end of the extension rod (31), a sliding sleeve (33) is arranged on the extension rod (31), a free end of the eccentric electric cylinder (32) is connected to the sliding sleeve (33), a slip ring (34) is arranged on the sliding sleeve (33) so as to be rotatably connected to one side of the end of the extension rod (31), a deflection motor (35) is arranged at the end of the extension rod (31), and the deflection motor (35) is fixedly connected to the end of the extension rod (31). ) An eccentric cam (42) is provided at the power end, an eccentric rotating shaft (44) is provided outside the eccentric cam (42), a centering assembly (30) is rotatably connected to the eccentric rotating shaft (44), an eccentric guide rod (43) is provided on the other side of the connection between the eccentric rotating shaft (44) and the centering assembly (30) and is slidably connected to the eccentric cam (42), an eccentric distance connecting rod (41) is hingedly connected to the outside of the slip ring (34), and the end of the eccentric distance connecting rod (41) is hingedly connected to the end of the eccentric guide rod (43).

2. The polishing device for container processing according to claim 1, characterized in that: The bottom of the orthogonal adjustment slider (13) is fixedly connected to two mutually perpendicular auxiliary sliders (24), and the auxiliary sliders (24) are slidably connected to the passive guide rail (12).

3. The polishing device for container processing according to claim 1, characterized in that: The centering assembly (30) comprises a cross bracket (36) and four spring pistons (37), wherein the spring pistons (37) are slidably connected to the ends of the cross bracket (36), the spring pistons (37) are arranged in a cross shape, a counterweight (38) is provided at the bottom of the cross bracket (36), an end plate (39) is provided at the free end of the spring piston (37), inclined lining blocks (40) are provided on both sides of the end plate (39), the end plate (39) is provided with a magnetic scale (52) extending toward the center of the cross bracket (36), and a plurality of magnetic encoders (51) matching the magnetic scale (52) are provided at the end of the cross bracket (36).

4. The polishing device for container processing according to claim 3 is characterized in that: A first steering gear (45) is provided at the center of the outer side of the cross bracket (36), a second steering gear (46) is provided at the outer fixed frame of the first steering gear (45), an output end of the first steering gear (45) is connected to a first swing arm (47), both ends of the first swing arm (47) are hingedly connected to a first push rod (49), an output end of the second steering gear (46) is connected to a second swing arm (48), both ends of the second swing arm (48) are hingedly connected to a second push rod (50), and the ends of the first push rod (49) and the second push rod (50) are respectively rotatably connected to the outer roots of a pair of coaxial spring pistons (37).

5. The polishing device for container processing according to claim 1, characterized in that: The orthogonal adjustment slider (13) is connected to a docking bracket (14), and the docking bracket (14) is fixedly provided with a polishing machine deflection bracket (15). A connecting arm (21) is provided on the side of the polishing machine (3), and the end of the connecting arm (21) is hingedly connected to the polishing machine deflection bracket (15). A second linear module (16) is provided at one end of the polishing machine deflection bracket (15). The second linear module (16) is driven by a deflection slider (17). The deflection slider (17) is hingedly connected to a pull rod (18), and the end of the pull rod (18) is hingedly connected to a bearing (19), and the polishing grinding wheel (4) is rotatably connected to the bearing (19).

6. The polishing device for container processing according to claim 1, characterized in that: A polishing motor (20) is fixedly connected to a side surface of the polishing machine (3); an output shaft of the polishing motor (20) extends into the interior of the polishing machine (3) and is connected to a first gear (22); a drive shaft of the polishing wheel (4) extends into the interior of the polishing machine (3) and is connected to a second gear (23); the first gear (22) is meshed with the second gear (23).

7. The polishing device for container processing according to claim 1, characterized in that: An auxiliary bracket (10) is provided on the side of the first linear module (11), and a guide rod (9) is connected to the auxiliary bracket (10). A guide bracket (6) is fixedly connected to the periphery of the main electric cylinder (2), and the guide bracket (6) is provided with a guide hole (7) that matches the guide rod (9), and the guide rod (9) is slidably connected to the guide hole (7).

8. The polishing device for container processing according to claim 1, characterized in that: The container linear module (25) is driven by a supporting slider (26), a supporting plate (27) is fixedly arranged on the top of the supporting slider (26), first limit blocks (28) are arranged at both ends of the supporting plate (27) to limit the end of the container frame (5), and second limit blocks (29) are arranged on both sides of the supporting plate (27) to limit the side of the container frame (5).

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