Feeding device for corrugated board processing

Abstract

The invention relates to the field of conveying facilities, in particular to a corrugated board processing feeding device which comprises a chain scraper conveyor, a plurality of fulcrum shaft frames are evenly distributed and fixedly installed on a chain plate of the chain scraper conveyor, threaded columns are rotatably installed at the ends of the fulcrum shaft frames in a penetrating mode, and box supporting pieces are installed at the rear ends of the threaded columns; a rotating gear is coaxially embedded in the front end of the threaded column, a pushing toothed plate is meshed with the side face of the rotating gear and elastically connected with the fulcrum shaft frame, a top seat is connected to the side face of the pushing toothed plate, a horizontal top frame is arranged at the front end of a rack of the chain scraper conveyor, and inclined guide frames extend from the two ends of the horizontal top frame correspondingly. And the horizontal top frame and the inclined guide frame correspond to the top seat. According to the corrugated board box loading device, the labor intensity of workers is reduced, the loading convenience degree is improved, overturning at different angles can be carried out, the corrugated board box loading device adapts to carrying of corrugated board boxes of different sizes, and the use requirements are effectively met.

Description

Technical Field

[0001] The invention relates to the field of conveying facilities, in particular to a feeding device for processing corrugated paperboard. Background Art

[0002] Corrugated cardboard is a board material consisting of a corrugated core layer and a covering layer formed between two or more layers of cardboard, commonly known as "corrugated sheets", "corrugated paper", "corrugated core paper", "corrugated paper core" and "corrugated base paper". The corrugated waves are like connected arched doors, arranged in a row and supporting each other to form a triangular structure. They have good mechanical strength, can withstand a certain amount of pressure from a plane, are elastic, and have a good buffering effect. Corrugated cardboard is often processed into a box shape, and some square and open-mouthed corrugated cardboard boxes often need to print some marking patterns on the surface of the box during processing. In this process, after one side of the corrugated cardboard box is printed, the worker needs to manually flip and adjust the corrugated cardboard box during transportation before printing on the other side of the corrugated cardboard box. This process greatly increases the labor intensity of the workers and affects the convenience of loading. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a feeding device for corrugated cardboard processing.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a feeding device for corrugated cardboard processing, including a chain conveyor, a plurality of support shaft frames are evenly distributed and fixedly installed on the chain plates of the chain conveyor, the ends of the plurality of support shaft frames are penetrated by threaded columns for rotation, the rear ends of the threaded columns are installed with box supporting parts, the front ends of the threaded columns are coaxially inlaid with rotating gears, the side surfaces of the rotating gears are meshed with pushing tooth plates, the pushing tooth plates are elastically connected to the support shaft frames, the side surfaces of the pushing tooth plates are connected with top seats, a horizontal top frame is arranged at the front end of the frame of the chain conveyor, inclined guide frames are extended at both ends of the horizontal top frame, and the horizontal top frame, the inclined guide frames and the top seats correspond to each other.

[0005] Preferably, the horizontal top frame and the inclined guide frame are integrally formed, and two frames are symmetrically fixedly installed on the lower end of the horizontal top frame. The ends of the frames are fixed to the frame of the chain conveyor, and connecting frames are extended from opposite sides of the two frames. The ends of the connecting frames are fixed to the inclined guide frame, and a support frame is fixedly installed at the rear end of the frame of the chain conveyor.

[0006] Preferably, an L-shaped frame is fixedly installed on the upper end of the support frame, and two guide sleeves are symmetrically fixedly installed on the side surfaces of the L-shaped frame, and guide rods are fitted inside the two guide sleeves, and the two ends of the guide rods respectively pass through the upper and lower ends of the guide sleeves, and the upper end of the guide rod is coaxially inlaid with a limiting ring, and the limiting ring is fitted to the upper end of the guide sleeve, the pushing tooth plate is located between the two guide rods, and the lower end of the guide rod is connected to the pushing tooth plate.

[0007] Preferably, connecting lugs are extended from the lower edges of the front and rear end faces of the pushing tooth plate, the lower end of the guide rod is fixed to the upper end of the connecting lug, a return spring is wound around the outer side of the guide rod, the upper end of the return spring is fixed to the lower end of the guide sleeve, the lower end of the return spring is fixed to the upper end of the connecting lug, a guide slider is connected to the side of the connecting lug, and the top seat is attached to one end of the guide slider.

[0008] Preferably, the front and rear end surfaces of the top seat are both provided with guide grooves, one end of the guide sliding block fits into the interior of the guide sliding groove, the other end of the guide sliding block is penetrated and inlaid with a connecting block, the end of the connecting block is fixed to the connecting lug, the upper end of the pushing tooth plate is connected with an adjusting threaded sleeve, an adjusting threaded rod is screwed inside the adjusting threaded sleeve, both ends of the adjusting threaded rod pass through the upper and lower ends of the adjusting threaded sleeve, and the lower end of the adjusting threaded rod is rotatably connected to the upper end of the top seat.

[0009] Preferably, a handwheel is coaxially fixedly mounted on the upper end of the adjusting threaded rod, an L-shaped ear extends from the outer surface of the adjusting threaded sleeve, the end of the L-shaped ear is fixed to the upper end of the pushing tooth plate, and a roller is mounted on the lower end of the top seat.

[0010] Preferably, the box supporting member includes four adjustment plate sleeves fixedly installed in a circular array on the rear end of the threaded column, and the interiors of the four adjustment plate sleeves are fitted with adjustment support plates, and the adjustment support plates extend through the ends of the adjustment plate sleeves, and box supporting plates are fixedly installed on the ends of the adjustment support plates, and support frames extend from both ends of the box supporting plates.

[0011] Preferably, reinforcement plates are obliquely extended on both sides of the adjustment support plate, ends of the reinforcement plates are fixed to the box support plate, a threaded ring is screwed on the outer surface of the threaded column, the threaded ring is located in front of the adjustment plate sleeve, a connecting ring is coaxially rotatably mounted on the outer surface of the threaded ring, four No. 1 protruding ears are extended in a circular array on the outer surface of the connecting ring, an adjusting top frame is rotatably mounted on the end of the No. 1 protruding ear, the adjusting top frame is obliquely arranged, a No. 2 protruding ear is rotatably mounted on the end of the adjusting top frame, the end of the No. 2 protruding ear is fixed to the front end of the adjustment support plate, and the plate support frame and the box support plate are integrally formed.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. When the chain conveyor drives the corrugated cardboard box to move to the horizontal top frame, the roller on the top seat will roll on the inclined guide frame, so as to use the inclined surface of the inclined guide frame to drive the top seat to move up, and then drive the push tooth plate to move up, so that the upward push tooth plate drives the rotating gear to rotate, and then drives the corrugated cardboard box supported on the threaded column to rotate, so as to change the printed surface of the corrugated cardboard box by itself. The process does not require manual adjustment by workers, thereby effectively reducing the labor intensity of workers and improving the convenience of loading.

[0013] 2. By rotating the adjusting threaded rod, the adjusting threaded rod can move up and down using the thread between the adjusting threaded sleeve, thereby driving the top seat to move up and down. At this time, the guide slider slides in the guide slot to guide the top seat, thereby changing the height of the top seat, and then changing the distance that the subsequent inclined guide frame drives the top seat to move up and drives the push tooth plate to move up, thereby changing the angle at which the push tooth plate drives the rotating gear to rotate, that is, changing the rotation angle of the corrugated cardboard box, so that the corrugated cardboard box can be flipped ninety degrees or one hundred and eighty degrees to meet the needs of use.

[0014] 3. By rotating the threaded ring, the threaded ring can move with the threaded column, thereby driving multiple adjustment top frames to move, so as to push multiple adjustment support plates at the same time, so that the adjustment support plates can slide out in the adjustment plate sleeve, so as to drive multiple box support plates to expand outward synchronously, so as to adapt to the loading of corrugated cardboard boxes of different sizes, so as to further meet the needs of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a feeding device for processing corrugated paperboard according to the present invention; Figure 2 It is a schematic diagram of a box support plate of a feeding device for processing corrugated paperboard according to the present invention; Figure 3 It is a schematic diagram of a threaded ring of a feeding device for processing corrugated paperboard according to the present invention; Figure 4 This is a schematic diagram of the top seat of a feeding device for processing corrugated paperboard according to the present invention; Figure 5 It is a schematic diagram of a horizontal top frame of a feeding device for processing corrugated paperboard according to the present invention; Figure 6 This is a usage view of a feeding device for corrugated cardboard processing according to the present invention.

[0016] In the figure: 1. chain conveyor; 2. support frame; 3. box support plate; 4. horizontal top frame; 5. frame seat; 6. L-shaped frame; 7. guide sleeve; 8. limit ring; 9. L-shaped ear; 10. adjustment thread sleeve; 11. adjustment thread rod; 12. return spring; 13. push tooth plate; 14. guide slider; 15. connecting lug; 16. guide rod; 17. guide slide; 18. roller; 19. top seat; 20. adjustment support plate; 21. adjustment plate sleeve; 22. reinforcement plate; 23. connecting ring; 24. threaded ring; 25. threaded column; 26. No. 1 extended ear; 27. adjustment top frame; 28. No. 2 extended ear; 29. ​​rotating gear; 30. connecting frame; 31. inclined guide frame; 32. connecting block; 33. hand wheel; 34. support frame; 35. plate support frame; 36. corrugated cardboard box. DETAILED DESCRIPTION

[0017] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0018] like Figure 1-Figure 6 The feeding device for corrugated cardboard processing shown in the figure comprises a chain conveyor 1, on the chain of the chain conveyor 1 there are a plurality of fulcrum frames 2 evenly distributed and fixedly installed, the fulcrum frames 2 play the role of bearing the threaded column 25, the ends of the plurality of fulcrum frames 2 are penetrated and rotatably installed with the threaded column 25, the rear end of the threaded column 25 is installed with a box support, the front end of the threaded column 25 is coaxially inlaid with a rotating gear 29, the side of the rotating gear 29 is meshed with a pushing tooth plate 13, the rotating gear 29 and the pushing tooth plate 13 cooperate to make the threaded column 25 rotate, the pushing tooth plate 13 is elastically connected to the fulcrum frames 2, the side of the pushing tooth plate 13 is connected with a top seat 19, the front end of the frame of the chain conveyor 1 is provided with a horizontal top frame 4, the horizontal top frame 4 The top seat 19 is kept at the same height after being moved up. Both ends of the horizontal top frame 4 are extended with inclined guide frames 31. The inclined guide frames 31 are used to move the top seat 19 up. The horizontal top frame 4 and the inclined guide frames 31 correspond to the top seat 19. The rollers 18 on the top seat 19 will roll on the inclined guide frames 31, so as to use the inclined surface of the inclined guide frames 31 to drive the top seat 19 to move up, thereby driving the push tooth plate 13 to move up, and the upward push tooth plate 13 drives the rotating gear 29 to rotate, thereby driving the corrugated cardboard box 36 supported on the threaded column 25 to rotate, so as to change the printed surface of the corrugated cardboard box 36 for printing. Because printing on the surface of an object is a prior art and has been widely used, it is not elaborated in detail here.

[0019] The horizontal top frame 4 and the inclined guide frame 31 are formed as one piece, and two frames 5 are symmetrically fixedly installed on the lower end of the horizontal top frame 4, and the frames 5 play the role of fixing the horizontal top frame 4. The ends of the frames 5 are fixed to the frame of the chain conveyor 1, and connecting frames 30 are extended on the opposite sides of the two frames 5. The connecting frames 30 play the role of fixing the inclined guide frame 31, and the ends of the connecting frames 30 are fixed to the inclined guide frame 31. A support frame 34 is fixedly installed at the rear end of the frame of the chain conveyor 1, and the support frame 34 plays the role of supporting the chain conveyor 1.

[0020] An L-shaped frame 6 is fixedly installed on the upper end of the support frame 2, and two guide sleeves 7 are symmetrically fixedly installed on the side of the L-shaped frame 6. The L-shaped frame 6 plays a role in bearing the guide sleeves 7. Guide rods 16 are fitted inside the two guide sleeves 7. Both ends of the guide rods 16 pass through the upper and lower ends of the guide sleeves 7 respectively. The guide sleeve 7 and the guide rod 16 play a role in vertically guiding the pushing tooth plate 13. The upper end of the guide rod 16 is coaxially inlaid with a limiting ring 8, which is fitted to the upper end of the guide sleeve 7. The limiting ring 8 plays a role in limiting the downward movement height of the pushing tooth plate 13. The pushing tooth plate 13 is located between the two guide rods 16, and the lower end of the guide rod 16 is connected to the pushing tooth plate 13.

[0021] Connecting lugs 15 are extended from the lower edges of the front and rear end surfaces of the pushing tooth plate 13, the lower end of the guide rod 16 is fixed to the upper end of the connecting lug 15, and the connecting lug 15 plays a connecting role. A return spring 12 is wound around the outer side of the guide rod 16, the upper end of the return spring 12 is fixed to the lower end of the guide sleeve 7, and the lower end of the return spring 12 is fixed to the upper end of the connecting lug 15. The return spring 12 plays a role in allowing the pushing tooth plate 13 to move downward and reset. A guide slider 14 is connected to the side of the connecting lug 15, and the guide slider 14 plays a role in guiding the top seat 19, and the top seat 19 is attached to one end of the guide slider 14.

[0022] The front and rear end surfaces of the top seat 19 are both provided with guide grooves 17, one end of the guide slider 14 is fitted into the inside of the guide groove 17, and the guide groove 17 plays a role of cooperating with the guide slider 14. The other end of the guide slider 14 is penetrated and inlaid with a connecting block 32, and the end of the connecting block 32 is fixed to the connecting lug 15, and the connecting block 32 plays a role of fixing the connecting lug 15. The upper end of the push-tooth plate 13 is connected with an adjusting threaded sleeve 10, and the inside of the adjusting threaded sleeve 10 is tightened with an adjusting threaded rod 11. The adjusting threaded sleeve 10 and the adjusting threaded rod 11 play a role of adjusting the height of the top seat 19, and the two ends of the adjusting threaded rod 11 pass through the upper and lower ends of the adjusting threaded sleeve 10, and the lower end of the adjusting threaded rod 11 is rotatably connected to the upper end of the top seat 19.

[0023] A handwheel 33 is coaxially fixedly installed on the upper end of the adjusting threaded rod 11, and the handwheel 33 serves to facilitate the rotation of the adjusting threaded rod 11. An L-shaped ear 9 is extended from the outer surface of the adjusting threaded sleeve 10, and the L-shaped ear 9 serves to fix the adjusting threaded sleeve 10. The end of the L-shaped ear 9 is fixed to the upper end of the pushing tooth plate 13. A roller 18 is installed on the lower end of the top seat 19, and the roller 18 serves to reduce wear.

[0024] The box supporting member includes four adjusting plate sleeves 21 fixedly installed in an annular array at the rear end of the threaded column 25, the adjusting plate sleeves 21 play a role in guiding the adjusting support plate 20, the insides of the four adjusting plate sleeves 21 are all fitted with adjusting support plates 20, the adjusting support plates 20 pass through the ends of the adjusting plate sleeves 21, and the adjusting support plates 20 play a role in adjusting the position of the box supporting plate 3, the ends of the adjusting support plates 20 are fixedly installed with the box supporting plate 3, and the two ends of the box supporting plate 3 are extended with support plate frames 35, the box supporting plate 3 is fitted to the inner wall of the corrugated cardboard box 36 to limit the surrounding positions of the corrugated cardboard box 36, and at the same time, the corrugated cardboard box 36 can be supported from the inside to facilitate printing, and the ends of the support plate frames 35 are against the inner bottom surface of the corrugated cardboard box 36 to limit the front and rear positions of the corrugated cardboard box 36.

[0025] Both sides of the adjustment support plate 20 are obliquely extended with reinforcement plates 22, the ends of the reinforcement plates 22 are fixed to the box support plate 3, and the reinforcement plates 22 play a role in strengthening the connection. The outer surface of the threaded column 25 is tightened with a threaded ring 24, and the threaded ring 24 is located in front of the adjustment plate sleeve 21. The threaded ring 24 plays a role in driving the adjustment top frame 27 to move. The outer surface of the threaded ring 24 is coaxially rotatably installed with a connecting ring 23. The connecting ring 23 plays a role in ensuring that the threaded ring 24 will not be obstructed when rotating. The outer surface of the connecting ring 23 is extended with a circular array There are four No. 1 protruding ears 26, and the end of the No. 1 protruding ear 26 is rotatably installed with an adjusting top frame 27, and the adjusting top frame 27 is set at an angle. The No. 1 protruding ear 26 plays a role of connecting the adjusting top frame 27, and the end of the adjusting top frame 27 is rotatably installed with a No. 2 protruding ear 28, and the end of the No. 2 protruding ear 28 is fixed to the front end of the adjusting support plate 20, the support plate frame 35 and the box support plate 3 are integrally formed, and the No. 2 protruding ear 28 plays a role of connecting the adjusting top frame 27, and the adjusting top frame 27 plays a role of adjusting the position of the adjusting support plate 20.

[0026] When conveying and loading, the threaded ring 24 can be rotated according to the size of the corrugated cardboard box 36, so that the threaded ring 24 can move with the threaded column 25, thereby driving the multiple adjustment top frames 27 to move, so as to push the multiple adjustment support plates 20 at the same time, so that the adjustment support plates 20 can slide out in the adjustment plate sleeve 21, so as to drive the multiple box support plates 3 to expand outward synchronously to adapt to the size of the corrugated cardboard box 36, and then the corrugated cardboard box 36 is sleeved outside the box support plate 3, and at this time the box support plate 3 is attached to the corrugated paper. The inner wall of the board box 36 is used to limit the surrounding position of the corrugated cardboard box 36. The end of the support frame 35 is pressed against the inner bottom surface of the corrugated cardboard box 36 to limit the front and rear positions of the corrugated cardboard box 36. Then the chain plate conveyor 1 works to drive the corrugated cardboard box 36 to the printing station to print the upper end of the corrugated cardboard box 36. After printing, the chain plate conveyor 1 continues to work to drive the corrugated cardboard box 36 to the printing station at the horizontal top frame 4. At this time, the roller 18 on the top seat 19 will fit the printing station. The inclined guide frame 31 rolls on the inclined surface of the inclined guide frame 31 to drive the top seat 19 to move up, thereby driving the push tooth plate 13 to move up, so that the push tooth plate 13 that moves up drives the rotating gear 29 to rotate, thereby driving the corrugated cardboard box 36 supported on the threaded column 25 to rotate, so as to change the printed surface of the corrugated cardboard box 36 for printing, and at the same time, the threaded rod 11 can be adjusted according to the required rotation, so that the adjusting threaded rod 11 can move up and down by using the thread between the adjusting threaded sleeve 10, thereby driving the top seat 19 to move up and down At this time, the guide slider 14 slides in the guide slot 17 to guide the top seat 19, thereby changing the height of the top seat 19, and then changing the distance that the subsequent inclined guide frame 31 drives the top seat 19 to move up and drives the push tooth plate 13 to move up, thereby changing the angle at which the push tooth plate 13 drives the rotating gear 29 to rotate, that is, changing the rotation angle of the corrugated cardboard box 36, so that the corrugated cardboard box 36 can be turned over by ninety degrees or one hundred and eighty degrees, so as to facilitate the printing operation on the side or lower end surface of the corrugated cardboard box 36.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A feeding device for processing corrugated paperboard, comprising a chain conveyor (1), characterized in that: A plurality of fulcrum frames (2) are evenly distributed and fixedly installed on the chain plates of the chain conveyor (1), and the ends of the plurality of fulcrum frames (2) are penetrated by threaded columns (25) for rotational installation, and the rear ends of the threaded columns (25) are installed with a box support member, and the front ends of the threaded columns (25) are coaxially inlaid with a rotating gear (29), and the side of the rotating gear (29) is meshed with a pushing tooth plate (13), and the pushing tooth plate (13) is elastically connected to the fulcrum frames (2), and the side of the pushing tooth plate (13) is connected to a top seat (19), and a horizontal top frame (4) is arranged at the front end of the frame of the chain conveyor (1), and oblique guide frames (31) are extended from both ends of the horizontal top frame (4), and the horizontal top frame (4) and the oblique guide frame (31) correspond to the top seat (19).

2. A feeding device for corrugated cardboard processing according to claim 1, characterized in that: The horizontal top frame (4) and the inclined guide frame (31) are integrally formed, and two frames (5) are symmetrically fixedly mounted on the lower end of the horizontal top frame (4), and the ends of the frames (5) are fixed to the frame of the chain conveyor (1). Connecting frames (30) extend from opposite sides of the two frames (5), and the ends of the connecting frames (30) are fixed to the inclined guide frame (31). A support frame (34) is fixedly mounted on the rear end of the frame of the chain conveyor (1).

3. A feeding device for corrugated cardboard processing according to claim 1, characterized in that: An L-shaped frame (6) is fixedly installed on the upper end of the support frame (2), and two guide sleeves (7) are symmetrically fixedly installed on the side of the L-shaped frame (6). Guide rods (16) are fitted inside the two guide sleeves (7), and the two ends of the guide rods (16) respectively penetrate the upper and lower ends of the guide sleeves (7). The upper end of the guide rod (16) is coaxially inlaid with a limit ring (8), and the limit ring (8) is fitted on the upper end of the guide sleeve (7). The pushing tooth plate (13) is located between the two guide rods (16), and the lower end of the guide rod (16) is connected to the pushing tooth plate (13).

4. A feeding device for corrugated cardboard processing according to claim 3, characterized in that: Connecting lugs (15) are extended from the lower edges of the front and rear end surfaces of the pushing tooth plate (13); the lower end of the guide rod (16) is fixed to the upper end of the connecting lug (15); a return spring (12) is wound around the outer side of the guide rod (16); the upper end of the return spring (12) is fixed to the lower end of the guide sleeve (7); the lower end of the return spring (12) is fixed to the upper end of the connecting lug (15); a guide slider (14) is connected to the side of the connecting lug (15); and the top seat (19) is attached to one end of the guide slider (14).

5. A feeding device for corrugated cardboard processing according to claim 4, characterized in that: The front and rear end surfaces of the top seat (19) are both provided with guide grooves (17); one end of the guide slider (14) is fitted into the inside of the guide groove (17); the other end of the guide slider (14) is penetrated and inlaid with a connecting block (32); the end of the connecting block (32) is fixed to the connecting lug (15); the upper end of the pushing tooth plate (13) is connected to an adjusting threaded sleeve (10); an adjusting threaded rod (11) is screwed into the inside of the adjusting threaded sleeve (10); the two ends of the adjusting threaded rod (11) pass through the upper and lower ends of the adjusting threaded sleeve (10); the lower end of the adjusting threaded rod (11) is rotatably connected to the upper end of the top seat (19).

6. A feeding device for corrugated board processing according to claim 5, characterized in that: A hand wheel (33) is coaxially fixedly mounted on the upper end of the adjusting threaded rod (11); an L-shaped ear (9) extends from the outer surface of the adjusting threaded sleeve (10); the end of the L-shaped ear (9) is fixed to the upper end of the pushing tooth plate (13); and a roller (18) is mounted on the lower end of the top seat (19).

7. A feeding device for corrugated board processing according to claim 6, characterized in that: The box-supporting member comprises four adjusting plate sleeves (21) fixedly mounted in an annular array at the rear end of the threaded column (25), the inside of each of the four adjusting plate sleeves (21) being fitted with an adjusting support plate (20), the adjusting support plate (20) extending through the end of the adjusting plate sleeve (21), a box-supporting plate (3) being fixedly mounted at the end of the adjusting support plate (20), and a support plate frame (35) extending from both ends of the box-supporting plate (3).

8. A feeding device for corrugated board processing according to claim 7, characterized in that: Reinforcement plates (22) are obliquely extended on both sides of the adjustment support plate (20), and the ends of the reinforcement plates (22) are fixed to the box support plate (3). A threaded ring (24) is screwed onto the outer surface of the threaded column (25), and the threaded ring (24) is located in front of the adjustment plate sleeve (21). A connecting ring (23) is coaxially rotatably mounted on the outer surface of the threaded ring (24). Four No. 1 protruding ears (26) are extended in an annular array on the outer surface of the connecting ring (23), and an adjustment top frame (27) is rotatably mounted on the end of the No. 1 protruding ear (26). The adjustment top frame (27) is obliquely arranged, and a No. 2 protruding ear (28) is rotatably mounted on the end of the adjustment top frame (27), and the end of the No. 2 protruding ear (28) is fixed to the front end of the adjustment support plate (20). The support plate frame (35) is integrally formed with the box support plate (3).

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