Can shell turnover mechanism and turnover device

Abstract

The invention discloses a can shell overturning mechanism and an overturning device, and belongs to the technical field of conveying devices for overturning or overturning objects. The turnover mechanism comprises a turnover frame and a guide strip; the overturning frame is provided with a rotating shaft, a plurality of cantilevers are arranged on the periphery of the outer side of the rotating shaft at intervals, and fixing plates are arranged at the tail ends of the cantilevers; a telescopic rod penetrates through the cantilever, a movable plate is arranged at the tail end, the telescopic rod is provided with a shifting rod, and the cantilever is provided with an elastic piece. The guide strip comprises an arc section and a first straight section arranged at one end of the arc section, the first straight section obliquely faces the upper portion of the outer side of the arc section, the guide strip is arranged on the side face of the overturning frame, and the arc section and the rotating shaft are coaxially arranged and located below the rotating shaft; the shifting rod is matched with the guide strip to drive the telescopic rod to move towards the middle of the overturning frame. The can shell turnover device comprises a discharging track and the can shell turnover mechanism, and the discharging track is located at the end, provided with the first straight section, of the turnover frame. According to the scheme, can shells can be continuously overturned, and higher overturning and conveying efficiency is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of conveying devices for overturning or flipping objects, and in particular relates to a can shell flipping mechanism and a flipping device. Background Art

[0002] Before canning food, the can shells need to be cleaned and sterilized. During cleaning and sterilization, the can shells are usually inverted to facilitate quick drainage. In order to ensure the hygiene of canned food, the can shells are immediately used for filling after cleaning. When canning food, the can shells need to be turned over with the opening facing up. Most cleaning equipment uses a conveyor belt to transport the can shells, and completes the cleaning and sterilization process during the transportation process. In order to ensure continuous production and improve filling efficiency, most filling equipment also uses a conveyor belt to transport the cans.

[0003] The patent application with application number 201711352150.9 discloses a can body flipping device, which is provided with a conveyor belt for conveying the box body, and a first disc and a second disc coaxially connected are provided on the front and rear sides of the conveyor belt, a cylinder is provided at an eccentric position inside the first disc, and a push rod of the cylinder is provided with a movable clamping block, and a fixed clamping block is provided on the inner side of the second disc at a position corresponding to the movable clamping block. The movable clamping block and the fixed clamping block are used to clamp the can, and the purpose of flipping the can is achieved by reciprocating the first disc and the second disc.

[0004] The patent application with application number 202121052774.0 discloses a box flipping mechanism for a coconut can production line, which uses a reciprocating flipping plate to flip the cans on the first conveyor belt to the second conveyor belt.

[0005] Although the above-mentioned prior arts can flip the can shells, only one can shell can be flipped at a time, and the next can shell can only be flipped after the flipping mechanism is reset. The interval time is slightly long, which affects the continuity and speed of can conveying. Summary of the invention

[0006] In order to solve the deficiencies of the prior art, the present invention provides a can shell turning mechanism and a turning device, which can continuously turn over the can shells and have higher turning and conveying efficiency.

[0007] In order to achieve the purpose of the present invention, the following scheme is proposed: A can shell turning mechanism, comprising a turning frame and a guide strip; The turning frame has a horizontally arranged rotation axis, and the turning frame is rotatably arranged around the rotation axis; A plurality of cantilevers are arranged at intervals on the outer circumference of the rotating shaft, and a fixing plate is provided on the side of the end of the cantilever facing the rotating direction of the turning frame; The cantilever is provided with a telescopic rod along the length direction, and a movable plate is provided at the end of the telescopic rod. The movable plate is located outside the fixed plate, facing the same direction as the corresponding fixed plate and parallel to the fixed plate. The telescopic rod is provided with a lever, and a strip hole for passing the lever is opened along the length direction of the side wall of the cantilever. The cantilever is provided with an elastic member for generating an elastic supporting force toward the end of the cantilever for the telescopic rod; The guide bar includes an arc segment and a first straight segment arranged at one end of the arc segment, the first straight segment is inclined upward toward the outer side of the arc segment, the guide bar is arranged on the side of the turning frame, the arc segment is coaxially arranged with the rotating shaft, and is located below the rotating shaft; The lever cooperates with the guide strip to drive the telescopic rod to move toward the middle of the flip frame. When the lever contacts the top surface of the first straight section, the fixed plate faces downward; when the lever contacts the top surface of the arc section, the movable plate and the fixed plate are at a minimum distance; when the lever moves out from the other end of the arc section, the fixed plate faces upward; when the lever moves out from the other end of the arc section, the movable plate and the fixed plate are at a maximum distance.

[0008] A can shell turning device comprises a discharge track and the above-mentioned can shell turning mechanism, wherein the discharge track is located at one end of a first straight section of a turning frame, when a lever contacts the first straight section, the top end of a corresponding fixed plate is located above the discharge track, and the distance between the top end of the fixed plate and the top surface of the discharge track is greater than the height of the can shell, and when the lever enters the arc section, the top ends of the movable plate and the fixed plate are both at a predetermined distance from the discharge track.

[0009] The beneficial effects of the present invention are as follows: the present invention utilizes a turning frame to drive a plurality of cantilevers arranged along a circumference to continuously rotate, and automatically hangs an inverted can shell through a fixed plate and a movable plate, and during the turning process, the fixed plate and the movable plate are used to hold the can shell tightly, and then the can shell is turned over, and the can shell is automatically released after turning over. The scheme can turn over the can shell continuously with a shorter interval time, and the turning efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.

[0011] Figure 1 A schematic diagram showing a preferred structure for flipping the can shell of the present application is shown.

[0012] Figure 2 A side view of a preferred structure of the flipping device of the present application is shown.

[0013] Figure 3 Another side view of the preferred structure of the flipping device of the present application is shown.

[0014] Figure 4A cross-sectional view is shown of the turning device of the present application when the fixing plate is used to hang the can shell.

[0015] Figure 5 The schematic diagram shows the state of the flipping device of the present application when releasing the can shell.

[0016] Figure 6 Shows Figure 5 A partial enlarged view of point A in the middle.

[0017] Figure 7 The overall structural diagram of the preferred embodiment of the flipping device of the present application is shown.

[0018] Markings in the figure: feed track -1, side plate -11, support bar -12, baffle bar -13, discharging track -2, turning frame -3, rotating shaft -31, cantilever -32, bar hole -321, fixed plate -33, accommodating groove -331, elastic member -34, limit plate -35, telescopic rod -4, movable plate -41, lever -42, guide bar -5, arc segment -51, first straight segment -52, second straight segment -53, frame -6, driving motor -61. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the implementation modes of the present invention are described in detail below with reference to the accompanying drawings. However, the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Embodiment 1, as Figure 1 , Figure 2 As shown, a can shell turning mechanism includes a turning frame 3 and a guide strip 5.

[0021] Specifically, Figure 1 As shown, the turning frame 3 has a horizontally arranged rotating shaft 31. The turning frame 3 is rotatably arranged around the rotating shaft 31, and the rotating shaft 31 is driven by a motor.

[0022] Specifically, Figure 1 As shown, a plurality of cantilevers 32 are arranged at intervals on the outer circumference of the rotating shaft 31, and a fixing plate 33 is arranged at the end of the cantilever 32 facing the rotating direction of the turning frame 3. Specifically, the angle between the fixing plate 33 and the cantilever 32 can be an acute angle, a right angle or an obtuse angle. In order to make the fixing plate 33 hang the can shell more stably and prevent the can shell from falling after being hung by the fixing plate 33, in a specific embodiment, the angle between the fixing plate 33 and the cantilever 32 can be set to 70 degrees to 110 degrees.

[0023] Specifically, Figure 1As shown, the cantilevers 32 are all provided with telescopic rods 4 along the length direction, and a movable plate 41 is provided at the end of the telescopic rod 4. The movable plate 41 is located on the outside of the fixed plate 33, and is in the same direction as the corresponding fixed plate 33 and is parallel to the fixed plate 33. A lever 42 is provided on the side of the telescopic rod 4 facing the side of the flip frame 3. A strip hole 321 for passing the lever 42 is opened along the length direction of the side wall of the cantilever 32. The cantilever 32 is provided with an elastic member 34 for generating an elastic supporting force for the telescopic rod 4 toward the end of the cantilever 32.

[0024] Specific, combined Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the guide bar 5 includes an arc segment 51 and a first straight segment 52 arranged at one end of the arc segment 51, the first straight segment 52 is inclined toward the upper side of the outer side of the arc segment 51, the guide bar 5 is arranged on the side of the flip frame 3, the arc segment 51 is coaxially arranged with the rotating shaft 31, and is located below the rotating shaft 31.

[0025] Specifically, the lever 42 cooperates with the guide bar 5 to drive the telescopic rod 4 to move toward the middle of the flip frame 3. Figure 5 As shown, when the lever 42 contacts the top surface of the first straight section 52, the fixing plate 33 faces downward, either vertically downward or tilted downward; Figure 2 As shown, when the lever 42 contacts the top surface of the arc segment 51, the movable plate 41 and the fixed plate 33 are at a minimum distance. Figure 2 , Figure 4 As shown, when the lever 42 moves out from the other end of the arc segment 51, the fixed plate 33 faces upward, either vertically upward or tilted; when the lever 42 moves out from the other end of the arc segment 51, the movable plate 41 moves away from the fixed plate 33 under the elastic force of the elastic member 34, so that the movable plate 41 is at a maximum distance from the fixed plate 33.

[0026] As a preferred solution, the cantilevers 32 are arranged in a circular array along the rotation axis 31 so that the time interval between each flipping is equal and the flipping frequency is consistent.

[0027] The principle of turning over the can shell using the above scheme is as follows: When working, the motor drives the rotating shaft 31 to make the flip frame 3 rotate continuously around the rotating shaft 31, thereby driving the lever 42 to cooperate with or separate from the guide bar 5; the cooperation mainly includes two stages: The first stage, such as Figure 5As shown, initially, the lever 42 contacts the top surface of the first straight section 52. At this time, the distance between the lever 42 and the rotating shaft 31 is the largest, which is the result of the elastic force generated by the elastic member 34 on the telescopic rod 4. Then, the flip frame 3 continues to rotate, driving the lever 42 to continue to rotate downward. In this embodiment, because the first straight section 52 is arranged on the left side of the arc section 51, the flip frame 3 will drive the lever 42 to continue to rotate downward and to the right. If the first straight section 52 is arranged on the right side of the arc section 51, then the flip frame 3 will drive the lever 42 to rotate downward and to the left. Because the first straight section 52 is arranged on the right side of the arc section 51, the flip frame 3 will drive the lever 42 to rotate downward and to the left. The straight section 52 is arranged obliquely toward the upper side of the outer side of the arc section 51, so when the flip frame 3 drives the lever 42 to rotate downward, the lever 42 is guided by the first straight section 52 to move toward the center of the flip frame 3, gradually reducing the distance between the lever 42 and the rotating shaft 31, thereby driving the telescopic rod 4 to move toward the center of the flip frame 3 to reduce the distance between the movable plate 41 and the fixed plate 33. It can be seen that the purpose of setting the first straight section 52 is to guide the telescopic rod 4 to retract toward the inside of the flip frame 3 so that the movable plate 41 can be smoothly retracted toward the fixed plate 33.

[0028] The second stage, such as Figure 2 As shown, the lever 42 enters the arc segment 51 from the first straight segment 52. At this time, the distance between the lever 42 and the center of the turning frame 3 is the smallest, and the distance between the movable plate 41 and the fixed plate 33 is also at a minimum. The turning frame 3 continues to rotate, driving the lever 42 to rotate toward the other end of the arc segment 51. The above two stages are the two states displayed when the lever 42 cooperates with the guide strip 5, and the first stage will also play a key role in the subsequent release of the can shell.

[0029] Combination Figure 2 , Figure 4 As shown, after the above two cooperation stages, the turning frame 3 continues to rotate, and the lever 42 will move out from the other end of the arc segment 51, so that the lever 42 is separated from the guide strip 5. When the lever 42 moves out from the arc segment 51, the fixed plate 33 is set upward, and the distance between the movable plate 41 and the fixed plate 33 is the smallest. At this time, the inverted can shell can be hung on the fixed plate 33 and the movable plate 41. In specific implementation, when the turning frame 3 rotates, the fixed plate 33 and the movable plate 41 can be used to penetrate the can shell from the bottom of the inverted can shell, and drive the can shell to rotate upward together.

[0030] Combination Figures 2 to 5 and Figure 7As shown, after the can shell is hung, the flip frame 3 continues to rotate to separate the lever 42 from the guide strip 5. After the separation, since the lever 42 is no longer restricted by the guide strip 5, the telescopic rod 4 will quickly pop outward under the elastic force of the elastic member 34, so that the movable plate 41 moves in the direction away from the fixed plate 33 until the movable plate 41 and the fixed plate 33 are respectively pressed against the inner walls of the can shell on both sides opposite to each other. In this way, the movable plate 41 and the fixed plate 33 can be used to clamp the can shell to prevent it from falling during the flipping process, and the moving stroke of the movable plate 41 is only limited by the inner diameter, inner wall length or inner wall width of the can shell at this time, so the movable plate 41 and the fixed plate 33 of this structural design can hold can shells of different sizes tightly.

[0031] like Figure 5 As shown, when the turning frame 3 drives the inverted can shell to rotate to the end corresponding to the first straight section 52, the opening of the can shell will be in an upward state, and the turning frame 3 is continuously rotated to make the lever 42 cooperate with the first straight section 52 again in the first stage. During the first stage of cooperation, the telescopic rod 4 will drive the movable plate 41 to move toward the fixed plate 33, thereby loosening the pressing force on the can shell. After the can shell loses the pressing force between the movable plate 41 and the fixed plate 33, it will automatically fall under the action of gravity; the above is the whole process of turning the can shell using this solution; because the cantilever 32 and the telescopic rod 4 are provided with multiple positions along the circumference of the rotating shaft 31, the can shell can be continuously turned over by continuously rotating the turning frame 3 to ensure the continuity of turning and conveying the can shell and improve the turning and conveying efficiency.

[0032] Preferably, Figure 4 As shown, the elastic member 34 is a cylindrical spring, which is arranged inside the hole structure of the cantilever 32 for passing the telescopic rod 4, and is located between the end of the telescopic rod 4 and the root of the cantilever 32. This structural design can prevent the elastic member 34 from falling, and does not occupy the external space of the flip frame 3. The installation structure is more stable and reliable, and the hole structure of the telescopic rod 4 in the cantilever 32 can be used to guide the cylindrical spring to prevent the cylindrical spring from twisting.

[0033] Preferably, Figure 1 , Figure 2 As shown, rollers are provided at the outer ends of the levers 42, and the levers 42 are rollingly matched with the guide strips 5 through the rollers to reduce friction and wear, and prevent the smoothness of the turning frame 3 from being affected when rotating.

[0034] Preferably, Figure 1 , Figure 2As shown, a receiving groove 331 is provided on one side of the fixed plate 33 facing the movable plate 41. When the lever 42 cooperates with the arc segment 51, the movable plate 41 is embedded in the receiving groove 331, so as to reduce the thickness of the minimum distance between the movable plate 41 and the fixed plate 33, thereby adapting to can shells with smaller sizes; and can reduce the minimum distance between the movable plate 41 and the center of the turning frame 3. After the can shell is released, the distance between the movable plate 41 and the center of the turning frame 3 is reduced, so that the carrier that receives the can shell, such as a platform or a conveyor belt, can be closer to the turning frame 3, so that the can shell can fall on the carrier more safely, thereby preventing the can shell from falling from the gap between the carrier and the turning frame 3.

[0035] Preferably, combined Figure 1 , Figure 2 , Figure 5 and Figure 7 As shown, the other end of the arc segment 51 is provided with a second straight segment 53, which is inclined toward the upper side of the outer side of the arc segment 51. By utilizing the inclined structure of the second straight segment 53, when the flip frame 3 rotates, the lever 42 moves smoothly from the junction of the arc segment 51 and the second straight segment 53 to the outer end of the second straight segment 53, so as to avoid that after the lever 42 is separated from the arc segment 51, the telescopic rod 4 is quickly ejected under the action of the elastic member 34, so that the movable plate 41 can stably support the inner wall of the can shell, prevent the movable plate 41 from impacting the can shell, and finally avoid the deformation and falling off of the can shell; preferably, the first straight segment 52, the arc segment 51 and the second straight segment 53 are an integrally formed structure.

[0036] Further preferably, Figure 1 As shown, a limiting plate 35 is provided on the cantilever 32 in the same direction as the fixing plate 33. The distance between the limiting plate 35 and the fixing plate 33 is 2 to 5 times the thickness of the can shell wall to facilitate the insertion of the side wall of the can shell between the limiting plate 35 and the fixing plate 33. The length of the limiting plate 35 is less than half of the length of the fixing plate 33 to avoid blocking the can shell from being inserted between the limiting plate 35 and the fixing plate 33. If the length of the limiting plate 35 is too long, then in the process of driving the fixing plate 33 to insert into the can shell by rotating the flip frame 3, the limiting plate 35 may be inserted into the can shell. Because after the second straight section 53 is provided, the telescopic rod 4 will extend outward smoothly and cannot pop out immediately after the lever 42 is separated from the arc section 51. Therefore, the limiting plate 35 can be provided so that in the early stage when the fixed plate 33 hangs the can shell, when the movable plate 41 has not yet pressed against the can shell, the limiting plate 35 can be used to abut the outer edge of the contact end of the can shell and the fixed plate 33, and the top edge of the fixed plate 33 can abut against the inner wall of the can shell, so as to prevent the other end of the can shell from rotating downward and causing the can shell to fall.

[0037] Preferably, Figure 2 , Figure 3As shown, the flip frame 3 is rotatably arranged on a frame 6 via a rotating shaft 31. The frame 6 is provided with a driving motor 61 for driving the rotating shaft 31 to rotate. Specifically, the driving motor 61 is directly connected to the rotating shaft 31 or is connected via a worm gear transmission structure. The use of a worm gear transmission can effectively prevent the flip frame 3 from rotating at will, and make the flip frame 3 rotate more smoothly.

[0038] Embodiment 2, as Figure 2 , Figure 3 and Figure 5 , Figure 7 As shown, a can shell turning device comprises a discharge track 2 and a can shell turning mechanism described in Example 1, wherein the discharge track 2 is located at one end of the turning frame 3 where a first straight section 52 is provided, and when the lever 42 contacts the first straight section 52, the top end of the corresponding fixed plate 33 is located above the discharge track 2, and the distance between the top end of the fixed plate 33 and the top surface of the discharge track 2 is greater than the height of the can shell, so that after the can shell is released, the can shell automatically falls on the discharge track 2, and there is a sufficient height difference to separate the can shell from the fixed plate 33, and when the lever 42 enters the arc section 51, the top ends of the movable plate 41 and the fixed plate 33 are both at a predetermined distance from the discharge track 2 to prevent accidents of parts collision; because the first straight section 52 is provided The first straight section 52 is provided on the movable plate 41, so when the lever 42 just contacts the first straight section 52 and continues to rotate with the turning frame 3, the tightening force of the movable plate 41 on the can shell will disappear, and the can shell will automatically fall down. In the process of the turning frame 3 continuing to rotate, the first straight section 52 will be used to quickly bring the movable plate 41 toward the center of the turning frame 3 to avoid collision with the discharge track 2. In a specific embodiment, the end of the discharge track 2 away from the turning frame 3 is designed to be inclined downward, so that the can shell can automatically slide away after falling, so as to avoid the movable plate 41 or the fixed plate 33 from touching the can shell again. Alternatively, the discharge track 2 is set as a conveyor belt structure, and the can shells falling on it are transferred and output in real time by using a continuously running transmission belt, and the output direction is as follows: Figure 2 , Figure 3 and Figure 5 Indicated by the arrow.

[0039] Further preferably, Figures 2 to 7 As shown, the turning device also includes a feeding track 1, which is arranged at the other end of the turning frame 3 relative to the discharging track 2, and is used to convey the inverted can shells to the turning frame 3. The conveying direction is as shown in FIG. Figures 2 to 5As shown in the direction of the middle arrow, the end of the feed track 1 facing the turning frame 3 has two vertical and spaced side plates 11, and the spacing distance between the side plates 11 is greater than the outer contour size of the can shell. For example, when the can shell is a cylinder, the distance between the side plates 11 is greater than the outer diameter of the can shell. When the can shell is a rectangular parallelepiped, the distance between the side plates 11 is greater than the width or length of the can shell. The two side plates 11 are provided with horizontal support bars 12 on the opposite sides to support the lower edge of the side wall of the can shell. When the turning frame 3 rotates, the fixed plate The fixed plate 33 and the movable plate 41 pass through the two horizontal support bars 12 from bottom to top, and the fixed plate 33 and the movable plate 41 passing through the horizontal support bars 12 are just below the first can shell at the end of the feeding track 1. The ends of the horizontal support bars 12 are provided with blocking bars 13 for blocking the can shells to prevent the can shells continuously fed by the feeding track 1 from falling. By adopting the above structural design, the feeding track 1 can be used to automatically send the can shells to the turning mechanism, and the turning frame 3 can be used to drive the fixed plate 33 to realize automatic material removal.

[0040] The above description is only a preferred embodiment of the present invention, and is not intended to be the only one or to limit the present invention. Those skilled in the art should understand that various changes or equivalent substitutions made to the present invention without departing from the scope of the present invention are within the scope of protection of the present invention.

Claims

1. A can shell turning mechanism, characterized in that: It comprises a turning frame (3) and a guide strip (5); The turning frame (3) has a horizontally arranged rotation axis (31), and the turning frame (3) is rotatably arranged around the rotation axis (31); A plurality of cantilevers (32) are arranged at intervals on the outer circumference of the rotating shaft (31), and a fixing plate (33) is provided at the end of the cantilever (32) facing the side of the rotating direction of the turning frame (3); The cantilever (32) is provided with a telescopic rod (4) along the length direction, a movable plate (41) is provided at the end of the telescopic rod (4), the movable plate (41) is located outside the fixed plate (33), faces the same direction as the corresponding fixed plate (33), and is parallel to the fixed plate (33), the telescopic rod (4) is provided with a lever (42), a strip hole (321) for passing the lever (42) is opened along the length direction of the side wall of the cantilever (32), and the cantilever (32) is provided with an elastic member (34) for generating an elastic support force for the telescopic rod (4) toward the end of the cantilever (32); The guide bar (5) comprises an arc segment (51) and a first straight segment (52) arranged at one end of the arc segment (51), the first straight segment (52) being inclined upward toward the outer side of the arc segment (51), the guide bar (5) being arranged on a side of the turning frame (3), the arc segment (51) being coaxially arranged with the rotating shaft (31) and being located below the rotating shaft (31); The lever (42) cooperates with the guide bar (5) to drive the telescopic rod (4) to move toward the middle of the flip frame (3). When the lever (42) contacts the top surface of the first straight section (52), the fixed plate (33) faces downward; when the lever (42) contacts the top surface of the arc section (51), the movable plate (41) and the fixed plate (33) are in a state of minimum distance; when the lever (42) moves out from the other end of the arc section (51), the fixed plate (33) faces upward; and after the lever (42) moves out from the other end of the arc section (51), the movable plate (41) and the fixed plate (33) are in a state of maximum distance.

2. A can shell turning mechanism according to claim 1, characterized in that: The elastic member (34) is a cylindrical spring, which is arranged inside a hole structure of the cantilever (32) for penetrating the telescopic rod (4), and is located between the end of the telescopic rod (4) and the root of the cantilever (32).

3. A can shell turning mechanism according to claim 1, characterized in that: The outer ends of the shifting rods (42) are provided with rollers, and the shifting rods (42) are rollingly matched with the guide strips (5) via the rollers.

4. A can shell turning mechanism according to claim 1, characterized in that: A receiving groove (331) is provided on one side of the fixed plate (33) facing the movable plate (41); when the lever (42) cooperates with the arc segment (51), the movable plate (41) is embedded in the receiving groove (331).

5. A can shell turning mechanism according to claim 1, characterized in that: The other end of the circular arc segment (51) is provided with a second straight segment (53), which is inclined upward toward the outer side of the circular arc segment (51).

6. A can shell turning mechanism according to claim 5, characterized in that: A limiting plate (35) is provided on the cantilever (32) and is oriented in the same direction as the fixing plate (33). The distance between the limiting plate (35) and the fixing plate (33) is 2 to 5 times the thickness of the can shell wall. The length of the limiting plate (35) is less than half the length of the fixing plate (33).

7. A can shell turning mechanism according to claim 1, characterized in that: The turning frame (3) is rotatably mounted on a frame (6) via a rotating shaft (31); the frame (6) is provided with a driving motor (61) for driving the rotating shaft (31) to rotate.

8. A can shell turning device, characterized in that: The invention comprises a discharge track (2) and a can shell turning mechanism according to any one of claims 1 to 7, wherein the discharge track (2) is located at one end of a turning frame (3) provided with a first straight section (52), when the lever (42) contacts the first straight section (52), the top end of the corresponding fixed plate (33) is located above the discharge track (2), and the distance between the top end of the fixed plate (33) and the top surface of the discharge track (2) is greater than the height of the can shell, and when the lever (42) enters the arc section (51), the top ends of the movable plate (41) and the fixed plate (33) are both at a predetermined distance from the discharge track (2).

9. A can shell turning device according to claim 8, characterized in that: It also includes a feed track (1) which is arranged at the other end of the turning frame (3) relative to the discharge track (2). The feed track (1) has two vertical side plates (11) arranged at intervals at one end facing the turning frame (3). The interval between the side plates (11) is greater than the outer contour size of the can shell. The two side plates (11) are each provided with a horizontal support bar (12) on the opposite side thereof, for supporting the lower edge of the side wall of the can shell. When the turning frame (3) rotates, the fixed plate (33) and the movable plate (41) pass between the two horizontal support bars (12) from bottom to top, and the fixed plate (33) and the movable plate (41) passing between the horizontal support bars (12) are just below the first can shell at the end of the feed track (1). The ends of the horizontal support bars (12) are each provided with a stop bar (13) for blocking the can shell.

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