Vertical bare packaging machine

Abstract

The utility model discloses a vertical type bare packaging machine, which belongs to the technical field of packaging and is characterized in that the vertical type bare packaging machine comprises a machine frame, and the machine frame is provided with a weighing mechanism, a material moving mechanism, a film releasing roller, a longitudinal film pulling mechanism, a film cutting mechanism, a transverse film pulling mechanism and a coating mechanism. The left and right coating plates move oppositely to coat the left and right sides of the preservative film at the bottom of the material, and the front and rear coating plates move oppositely to coat the front and rear sides of the preservative film at the bottom of the material; the full-automatic preservative film wrapping machine has the advantages that the full-automatic operation of preservative film wrapping is achieved through movement cooperation of all the mechanisms, the packaging efficiency is improved, and the stability of the packaging quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, and more specifically to a vertical naked packaging machine. Background Art

[0002] With the rapid development of modern industrial production, material packaging technology has been widely used and continuously improved. Among them, plastic wrapping, as an important packaging method, is widely used in the packaging of fruits, vegetables and meat.

[0003] However, the traditional material wrapping operation has problems such as cumbersome operation and unstable wrapping effect. In actual operation, after placing the fruits and vegetables on the packaging tray, the workers need to weigh them first, then manually stretch and tighten the plastic wrap, wrap the entire packaging tray with plastic wrap, and then cut off the plastic wrap. These steps are not only complicated to operate, but also inefficient. In addition, due to errors and uncontrollable factors in the operation process, such as uneven film stretching and inaccurate wrapping position, the wrapping effect is often unsatisfactory, affecting the storage and transportation of materials. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the present utility model is to provide a vertical naked packaging machine, which has the advantage of realizing the full automation of the plastic wrap packaging by setting the motion coordination of various mechanisms, which not only improves the packaging efficiency but also ensures the stability of the packaging quality.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A vertical naked bagging machine comprises a frame, on which are arranged: a weighing mechanism, comprising a loading platform for placing materials, a weighing sensor being arranged below the loading platform; a material moving mechanism, comprising a receiving platform for driving the movement of materials, a longitudinal moving component for driving the receiving platform to move longitudinally, and a vertical moving component for driving the receiving platform to move vertically; a film placing component, comprising two film placing rollers parallel to each other, between which the cling film is placed, and two side stop rollers arranged along the length direction of the film placing rollers, wherein the side stop rollers are respectively fitted with two ends of the cling film; a longitudinal film pulling mechanism, comprising a first film pulling component and a second film pulling component which are slidably arranged, wherein the first film pulling component clamps the cling film; The rear end of the plastic wrap film moves longitudinally to cover the top of the material receiving platform with the plastic wrap film, and the second film-pulling assembly is used to clamp the plastic wrap film on the other side of the material receiving platform; a film cutting mechanism, when the second film-pulling assembly clamps the plastic wrap film, the film cutting mechanism cuts the plastic wrap film; a transverse film-pulling mechanism, used to clamp the transverse ends of the plastic wrap film, including side film-pulling assemblies respectively arranged on the left and right sides of the frame; a covering mechanism, including two left and right covering plates moving transversely, and two front and rear covering plates moving longitudinally, when the material receiving platform drives the material to move above the covering mechanism, the two left and right covering plates move toward each other to cover the left and right sides of the plastic wrap film on the bottom of the material, and the two front and rear covering plates move toward each other to cover the front and rear sides of the plastic wrap film on the bottom of the material.

[0007] The utility model is further configured as follows: a plurality of bearing rods are arranged at intervals on the loading platform, materials are placed on the bearing rods, a plurality of bearing blocks are arranged at intervals on the receiving platform, the bearing blocks and the bearing rods are arranged alternately, the bearing blocks are rotatably connected to the loading platform, the rotating shaft of the bearing blocks is arranged longitudinally, and when the two left and right covering plates move toward each other, the bearing blocks rotate to give way.

[0008] The utility model is further configured as follows: a limit block is movably arranged on the material receiving platform, the limit block protrudes above the bearing block to prevent materials from sliding, and when the material receiving platform moves upward, the limit block will be pressed downward, and a connecting rod assembly for driving the limit block to move is arranged on the material receiving platform.

[0009] The utility model is further configured as follows: the connecting rod assembly includes an upper rod and a lower rod rotatably connected to the material receiving platform, the other ends of the upper rod and the lower rod are rotatably connected to the limit block, the material receiving platform is located below the lower rod and is rotatably connected to a driving rod, a connecting rod is connected between the driving rod and the lower rod, a connecting rod protrusion is provided on the frame, when the material receiving platform moves upward, the driving rod abuts against the connecting rod protrusion and is pressed downward, and the connecting rod drives the lower rod to rotate downward, thereby driving the limit block to move downward; a reset tension spring is connected between the upper rod and the lower rod, and when the reset tension spring is in an initial state, the limit block protrudes above the bearing block.

[0010] The utility model is further configured as follows: the longitudinal moving component includes a longitudinal sliding rod and a longitudinal driving motor, the longitudinal sliding rod is slidably connected with a longitudinal connecting piece, the longitudinal connecting piece is provided with a cam groove, the material receiving platform has a cam protruding toward the cam groove, the longitudinal driving motor drives the longitudinal connecting piece to slide on the longitudinal sliding rod, and through the cam groove and the cam cooperation, the material receiving platform is driven to move longitudinally.

[0011] The utility model is further configured as follows: the vertical moving component includes a vertical sliding rod and a vertical driving motor, the vertical sliding rod is slidably connected to a lifting platform, the lifting platform is provided with a longitudinal guide rod, the material receiving platform is slidably connected to the longitudinal guide rod and thus connected to the lifting platform, the vertical driving motor drives the lifting platform to slide on the vertical sliding rod, thereby driving the material receiving platform to move in the vertical direction.

[0012] The utility model is further configured as follows: the film cutting mechanism comprises a film cutting support plate, a film cutting knife is movably arranged on the film cutting support plate, the film cutting knife is arranged to extend in a transverse direction, the film cutting knife moves in a vertical direction to cut the cling film, and a film cutting cylinder for driving the film cutting knife to move is arranged on the film cutting support plate.

[0013] The utility model is further configured as follows: a fixed film plate is arranged below the film cutting support plate, a movable film plate is movably arranged on the frame, the front ends of the fixed film plate and the movable film plate are in the shape of a rack, a film feeding roller is rotatably connected to the film cutting support plate, the cling film is attached to the bottom of the fixed film plate after passing through the film feeding roller, and the movable film plate moves forward to clamp and position the cling film with the fixed film plate.

[0014] The utility model is further configured as follows: the first film-pulling assembly includes a film-pulling plate extending in a transverse direction, a middle clamp is provided in the middle of the film-pulling plate, left and right clamps are provided on both sides of the middle clamp, the middle clamp and the left and right clamps are composed of a plurality of clamps, the clamps extend into the rack interval of the fixed film plate to clamp the cling film, the film-pulling plate is provided with a first cylinder for driving the middle clamp and a second cylinder for driving the left and right clamps, the frame is provided with a film-pulling drive motor for driving the first film-pulling assembly to move in the longitudinal direction, a synchronous belt is connected to the film-pulling drive motor, one side of the first film-pulling assembly is fixed on the synchronous belt, and the film-pulling drive motor drives the first film-pulling assembly to move via the synchronous belt.

[0015] The utility model is further configured as follows: the side-pull film assembly includes a side-pull support plate fixed on the frame, a side-pull connecting plate movably arranged on the side-pull support plate, a rotating block is connected between the upper and lower ends of the side-pull connecting plate and the side-pull support plate, both ends of the rotating block are rotatably connected, and also includes a side-pull cylinder, the piston rod of the side-pull cylinder is connected to the upper rotating block, and a side-pull clamping plate is also connected to the side-pull connecting plate, when the side-pull cylinder drives the side-pull connecting plate to move upward, the side-pull clamping plate abuts and cooperates with the left and right covering plates, thereby clamping the lateral ends of the cling film.

[0016] The utility model is further configured as follows: the covering mechanism includes a panel, and the panel is respectively provided with a first covering motor and a second covering motor for driving left and right covering plates and front and rear covering plates, and the front and rear covering plates have a heat sealing function.

[0017] Compared with the prior art, the utility model has at least the following advantages:

[0018] 1. After the weighing mechanism completes material weighing, the material transfer mechanism moves the material from the weighing mechanism to the bottom of the wrapping mechanism through the longitudinal and vertical moving components. The longitudinal film pulling mechanism covers the material with plastic wrap. When the material transfer mechanism moves upward, it lifts the plastic wrap to the top of the wrapping mechanism. The wrapping mechanism wraps the plastic wrap on the material through the left and right wrapping plates and the front and rear wrapping plates. By setting the movement coordination of each mechanism, the whole process of material weighing, material transfer, and plastic wrap wrapping is realized. It not only improves the packaging efficiency, but also ensures the stability of packaging quality.

[0019] 2. By setting a limit block on the loading platform, the material on the load-bearing block is limited to prevent the material from rolling off the loading platform when the loading platform moves, thereby improving the stability of the material. When the coating mechanism is coating, the limit block can also be driven down by the connecting rod assembly to avoid interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of this embodiment;

[0021] Figure 2 is a side view of this embodiment;

[0022] Figure 3 is a front view of the present embodiment;

[0023] Figure 4 It is a structural diagram of the weighing mechanism;

[0024] Figure 5 It is the front view of the weighing mechanism;

[0025] Figure 6 It is a schematic diagram of the material transfer mechanism and the longitudinal film pulling mechanism;

[0026] Figure 7 It is a schematic diagram of the material transfer mechanism;

[0027] Figure 8 is a schematic diagram of the longitudinally movable assembly;

[0028] Fig. 9 is a schematic diagram of a vertically movable assembly;

[0029] Fig.10 It is a schematic diagram of the material receiving platform;

[0030] Fig.11 It is a cross-sectional view of the material receiving platform;

[0031] Fig.12 It is a schematic diagram when the limit block is pressed down;

[0032] Fig.13 is a schematic diagram of the film cutting mechanism;

[0033] Fig.14 It is the rear view of the film cutting mechanism;

[0034] Fig.15 is a schematic diagram of the first film drawing assembly;

[0035] Fig.16 is a front view of the first film drawing assembly;

[0036] Fig.17 is a schematic diagram of the covering mechanism;

[0037] Fig.18 It is a schematic diagram of the buffer structure at the synchronous wheel in the covering mechanism;

[0038] Fig.19 is a schematic diagram of the guide structure in the covering mechanism;

[0039] Fig. 20 It is a front view of the side-pull membrane assembly;

[0040] Fig.21 It is a schematic diagram of the side-pull membrane assembly.

[0041] Description of reference numerals:

[0042] 1. Film placing assembly; 101. Film placing roller; 102. Side blocking roller;

[0043] 2. Weighing mechanism; 201. Loading platform; 202. Loading rod; 203. Transfer plate; 204. Elastic element; 205. Heightening block;

[0044] 3. Material bearing platform; 301. Bearing block; 302. Limiting block; 303. Upper rod; 304. Lower rod; 305. Driving rod; 306. Connecting rod; 307. Reset spring; 308. Cam follower;

[0045] 4. Longitudinal moving assembly; 401. Longitudinal sliding rod; 402. Longitudinal driving motor; 403. Longitudinal connecting piece; 404. Cam groove;

[0046] 5. Vertical moving assembly; 501. Vertical sliding rod; 502. Vertical driving motor; 503. Lifting platform; 504. Longitudinal guide rod; 505. Vertical tension spring;

[0047] 6. Film cutting mechanism; 601. Film cutting support plate; 602. Film cutting knife; 603. Film cutting cylinder; 604. Transition plate; 605. Right angle block; 606. Film fixing plate; 607. Film feeding roller;

[0048] 7. First film-drawing assembly; 701. Film-drawing plate; 702. Film-drawing guide rod; 703. Film-drawing driving motor; 704. Middle clamp; 705. Left and right clamps; 706. First cylinder; 707. Second cylinder; 708. First rotating shaft; 709. Second rotating shaft;

[0049] 8. Enveloping mechanism; 801. Left and right enveloping plates; 802. Front and rear enveloping plates; 803. Panel; 804. First enveloping motor; 805. Second enveloping motor; 806. Left and right enveloping guide rods; 807. Left and right enveloping guide plates; 808. Guide wheels; 809. Front and rear enveloping guide grooves; 810. Buffer plate; 811. Buffer tension spring; 812. Buffer groove;

[0050] 9. Side-pull membrane assembly; 901. Side-pull support plate; 902. Side-pull connecting plate; 903. Rotating block; 904. Side-pull cylinder; 905. Side-pull movable plate; 906. Side-pull clamping plate; 907. Top block;

[0051] 10. Second film-pulling assembly; 11. Guide groove; 12. Connecting rod protrusion; 13. Heating plate; 14. Printer; 15. Cling film; 16. Frame; 17. Moving film plate. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0053] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] A vertical naked packaging machine, such as Figures 1 to 3 As shown, it includes a frame, on which are arranged: a weighing mechanism 2, a material moving mechanism, a film placing assembly 1, a longitudinal film pulling mechanism, a film cutting mechanism 6, a coating mechanism 8 and a heating assembly.

[0055] like Figure 4 and Figure 5 As shown, the weighing mechanism 2 is arranged at the front end of the frame 16, including a loading platform 201 for placing materials. The materials are generally products such as fruits and vegetables that directly need to be covered with plastic wrap on their surfaces. A weighing sensor is arranged under the loading platform 201. When the material is placed on the loading platform 201, it can be weighed and the weight information is sent to the controller in the device. The controller controls the printer 14 on the frame 16 to print out labels, thereby reducing manual operations and errors and providing a more accurate and standardized packaging process.

[0056] A number of load-bearing rods 202 are arranged at intervals on the loading platform 201, and the materials are placed on the load-bearing rods 202. A transfer plate 203 is connected to the bottom of the loading platform 201. The weighing sensor includes an elastic element 204 arranged at the bottom of the transfer plate 203. A raising block 205 is arranged between the top of the left end of the elastic element 204 and the transfer plate 203. A raising block 205 is also arranged at the bottom of the right end of the elastic element 204, so that the left end of the elastic element 204 is suspended in the air. When the material is placed on the loading platform 201, the left end of the elastic element 204 will be pressed down to measure the weight information of the material.

[0057] like Figure 6 As shown, the material moving mechanism includes a material receiving platform 3 for driving the movement of materials, a longitudinal moving component 4 for driving the material receiving platform 3 to move in the longitudinal direction, i.e., the front-to-back direction, and a vertical moving component 5 for driving the material receiving platform 3 to move in the vertical direction. A plurality of supporting blocks 301 are arranged at intervals on the material receiving platform 3, and the supporting blocks 301 and the supporting rods 202 are staggered. When the material receiving platform 3 moves the materials, it first moves to the bottom of the loading platform 201, and then moves upward to allow the supporting blocks 301 to pass through the supporting rods 202 to lift the materials.

[0058] like Figure 7 and Figure 8As shown, the longitudinal moving component 4 includes a longitudinal sliding rod 401 and a longitudinal driving motor 402. The longitudinal sliding rod 401 is slidably connected with a longitudinal connecting piece 403. The longitudinal connecting piece 403 is provided with a cam groove 404. The cam groove 404 extends in the vertical direction. The material receiving platform 3 has a cam follower 308 protruding toward the cam groove 404. The peripheral side wall of the cam follower 308 is in contact with the inner wall of the cam groove 404. The longitudinal driving motor 402 drives the longitudinal connecting piece 403 to slide on the longitudinal sliding rod 401 through a synchronous wheel and a synchronous belt, and drives the cam follower 308 to move longitudinally through the cam groove 404, thereby driving the material receiving platform 3 to move longitudinally.

[0059] A guide groove 11 is fixed on the frame 16 , and the guide groove 11 is extended in the longitudinal direction. The top of the longitudinal connecting member 403 is slidably connected to the guide groove 11 , thereby playing a guiding role and limiting the moving track of the longitudinal connecting member 403 .

[0060] like Fig. 9 As shown, the vertical moving component 5 includes a vertical sliding rod 501 and a vertical driving motor 502. The vertical sliding rod 501 is slidably connected with a lifting platform 503. A longitudinal guide rod 504 is arranged on the lifting platform 503. A longitudinal bearing is arranged at the bottom of the material receiving platform 3. The longitudinal bearing is sleeved on the longitudinal guide rod 504. When the longitudinal moving component 4 drives the material receiving platform 3 to move longitudinally, the material receiving platform 3 slides on the longitudinal guide rod 504. Therefore, the material receiving platform 3 is slidably connected to the longitudinal guide rod 504 and thus connected to the lifting platform 503. The vertical driving motor 502 drives the lifting platform 503 to slide on the vertical sliding rod 501 through the synchronous wheel and the synchronous belt, thereby driving the material receiving platform 3 to move in the vertical direction. When the material receiving platform 3 moves in the vertical direction, the cam follower 308 will also move up and down in the cam groove 404 of the longitudinal connecting member 403.

[0061] A vertical tension spring 505 is arranged in the vertical moving component 5, and the bottom of the vertical tension spring 505 is connected to the lifting platform 503. When the lifting platform 503 rises, it needs to overcome gravity. When the lifting platform 503 descends, the vertical tension spring 505 will pull up and store force, so that the lifting platform 503 rises faster.

[0062] like Figures 10 to 12 As shown, the supporting block 301 is rotatably connected to the material receiving platform 3, and the rotation axis of the supporting block 301 is arranged along the longitudinal direction, so that the supporting block 301 can rotate in the transverse direction. When the two left and right covering plates 801 move toward each other, the supporting block 301 will be pressed down and rotated to make way. A torsion spring is arranged at the rotation axis of the supporting block 301 to realize the reset of the supporting block 301. The left and right covering plates 801 are located above the front and rear covering plates 802, and the left and right covering plates 801 are covered first. When the left and right covering plates 801 complete the covering, the material will be transferred from the material receiving platform 3 to the left and right covering plates 801, and the front and rear covering plates 802 will be covered again.

[0063] A limit block 302 is movably arranged on the material receiving platform 3. The limit block 302 protrudes above the supporting block 301 to prevent the material from slipping. The limit block 302 protrudes upward from both longitudinal ends of the supporting block 301, so that the material receiving platform 3 is not easy to slip when moving, especially when loading cylindrical materials. When the material receiving platform 3 moves upward, the limit block 302 will be pressed down to prevent the limit block 302 from interfering with the left and right covering plates 801. A connecting rod assembly for driving the limit block 302 to move is arranged on the material receiving platform 3.

[0064] The connecting rod assembly includes an upper rod 303 and a lower rod 304 rotatably connected to the material receiving platform 3, the other ends of the upper rod 303 and the lower rod 304 are rotatably connected to the limit block 302, the loading platform 201 is located below the lower rod 304 and is rotatably connected to the driving rod 305, a connecting rod 306 is connected between the driving rod 305 and the lower rod 304, and a connecting rod protrusion 12 is arranged on the machine platform. When the material receiving platform 3 moves upward, the driving rod 305 abuts against the connecting rod protrusion 12 and is pressed downward, and the connecting rod 306 fixed on the driving rod 305 moves downward to drive the lower rod 304 to rotate downward, thereby The movable limit block 302 moves downward; a reset spring 307 is connected between the upper rod 303 and the lower rod 304. When the reset spring 307 is in the initial state, the limit block 302 protrudes above the supporting block 301. As the lower rod 304 and the upper rod 303 rotate downward, the distance between the connection between the lower rod 304 and the upper rod 303 reset spring 307 will become farther. Therefore, when there is no external force pressing the driving rod 305 downward, the reset spring 307 will be in the initial state, and the reset spring 307 itself has a supporting force, and the limit block 302 will always remain in the position protruding from the supporting block 301.

[0065] like Figure 1 and Figure 2 As shown, the film placing assembly 1 is arranged above the frame 16, and includes two film placing rollers 101 which are parallel to each other and spaced apart along the longitudinal direction. The cling film is placed between the two film placing rollers 101. The film placing roller 101 is rotatably connected to the frame 16, and a damper is provided at the end of the film placing roller 101, so that the cling film has a certain damping effect when the film placing rotates. The film placing rollers 101 also include two side stop rollers 102 arranged along the length direction of the film placing roller. The side stop rollers 102 are respectively fitted with two ends of the cling film for positioning the cling film. The side stop rollers 102 are locked in the long slot holes with screws. The screws can be loosened to adjust the position along the length direction of the film placing roller 101 to accommodate cling films of different lengths.

[0066] like Fig.13 and Fig.14As shown, the film cutting mechanism 6 is arranged below the film placing roller 101, and the film cutting mechanism 6 includes a film cutting support plate 601 fixed on the frame 16, and a film cutting knife 602 is movably arranged on the film cutting support plate 601, and the film cutting knife 602 is arranged to extend in the horizontal direction, and the film cutting knife 602 can move in the vertical direction to cut the cling film 15, and a film cutting cylinder 603 for driving the film cutting knife 602 to move is arranged on the film cutting support plate 601, and the piston rod of the film cutting cylinder 603 is extended and retracted in the horizontal direction, and the piston rod of the film cutting cylinder 603 is connected with a transition plate 604, and the film cutting support plate 601 is rotatably connected with a straight Corner block 605, the rotating shaft of the right-angle block 605 is located at its corner, the short side of the right-angle block 605 is rotatably connected to the transition plate 604, and the long side is rotatably connected to the film cutting knife 602. When the film cutting cylinder 603 is extended or retracted, the transition plate 604 moves laterally, driving the short side of the right-angle block 605 to move, thereby driving the film cutting knife 602 to move up and down through the long side. The film cutting knife 602 always remains in a horizontal state when moving, and compared with the vertically arranged cylinder drive, the film cutting knife 602 is driven by the right-angle block 605 to make an arc motion, with a lateral displacement, and has a cross-cutting effect, making it easier to cut the plastic wrap 15.

[0067] A fixed film plate 606 is arranged below the film cutting support plate 601, and a movable film plate 17 is movably arranged on the frame 16. The front ends of the fixed film plate 606 and the movable film plate 17 are in the shape of a rack. A sliding hole is opened longitudinally on the movable film plate 17, and bolts pass through the sliding hole to be threadedly connected to the frame 16. After loosening the bolts, the movable film plate 17 can be pulled longitudinally. A film feeding roller 607 is rotatably connected to the film cutting support plate 601. When fixing the cling film 15, the movable template is pulled out first, and the cling film 15 is attached to the bottom of the fixed film plate 606 after passing through the film feeding roller 607, and then the movable film plate 17 is pushed forward to clamp the cling film 15 in place together with the fixed film plate 606.

[0068] The film feeding roller 607 plays a role in positioning and guiding the cling film 15 during use. There is tape on the surface of the film feeding roller 607, which makes the cling film 15 sticky when passing through the film feeding roller 607, and can stick to the cling film 15 to prevent it from falling down. The connection between the two ends of the film feeding roller 607 is also provided with a friction sleeve, which is used to increase the friction force at both ends of the film feeding roller 607. When the cling film 15 passes through the film feeding roller 607, the film feeding roller 607 will not rotate for a long time.

[0069] like Fig.15 and Fig.16 As shown, the longitudinal film-pulling mechanism is arranged below the film-releasing roller 101, and includes a first film-pulling assembly 7 and a second film-pulling assembly 10 which are arranged to slide along the longitudinal direction. The first film-pulling assembly 7 clamps the end of the cling film 15 and moves longitudinally to cover the top of the material receiving table 3 with the cling film 15. The second film-pulling assembly 10 is used to clamp the cling film 15 on the other side of the material receiving table 3 to tighten the cling film 15.

[0070] The first film-stretching assembly 7 includes a film-stretching plate 701 extending in the transverse direction, and film-stretching guide rods 702 are arranged in the longitudinal direction at both ends of the left and right sides of the frame 16. Both ends of the film-stretching plate 701 are slidably connected to the film-stretching guide rods 702 through bearings. A film-stretching driving motor 703 for driving the first film-stretching assembly 7 to move in the longitudinal direction is arranged on the frame 16. A synchronous wheel and a synchronous belt are connected to the film-stretching driving motor 703. One side of the first film-stretching assembly 7 is fixed on the synchronous belt. The film-stretching driving motor 703 drives the first film-stretching assembly 7 to move along the film-stretching guide rod through the synchronous wheel and the synchronous belt.

[0071] The film clamping plate 701 is provided with a middle clamping piece 704 in the middle, and the film clamping plate 701 is provided with left and right clamping pieces 705 on both sides of the middle clamping piece 704. The middle clamping piece 704 and the left and right clamping pieces 705 are provided with a plurality of clamping plates, and the clamping plates are spaced apart from the racks of the fixed film plate 606 so that the clamping plates can extend into the rack interval of the fixed film plate 606 to clamp the cling film 15. The film clamping plate 701 is provided with a first cylinder 706 for driving the middle clamping piece 704 and a first cylinder 706 for driving the left and right clamping pieces 705. The second cylinder 707 of the component 705, the first rotating shaft 708 and the second rotating shaft 709 are rotatably set at the bottom of the clamping plate 701, the clamping plate of the middle clamping component 704 is connected to the first rotating shaft 708, and the clamping plates of the left and right clamping components 705 are connected to the second rotating shaft 709. The first cylinder 706 and the second cylinder 707 respectively drive the first rotating shaft 708 and the second rotating shaft 709 to rotate through the connecting rod, so that the clamping plate rotates upward to cooperate with the upper clamping plate 701 to clamp the cling film 15.

[0072] The second film-stretching component 10 is also slidably connected to the film-clamping guide rod. Film-stretching driving motors 703 are arranged on the left and right sides of the frame 16, one is used to drive the first film-stretching component 7, and the other is used to drive the second film-stretching component 10. The difference between the second film-stretching component 10 and the first film-stretching component 7 is that the clamping plate of the second film-stretching component 10 is arranged opposite to the first film-stretching component 7, the first film-stretching component 7 clamps the cling film 15 over the top of the material receiving table 3, and the second film-stretching component 10 clamps the cling film 15 on the other side of the material receiving table 3. At this time, the first film-stretching component 7 and the second film-stretching component 10 are respectively located on both sides of the material receiving table 3 to achieve clamping of the longitudinal ends of the cling film 15. The film cutting mechanism 6 is located behind the second film-stretching component 10, and the film cutting knife 602 cuts and separates the cling film 15 from the whole.

[0073] like Fig.17As shown, the wrapping mechanism is arranged above the film pulling assembly, including a panel 803, on which are arranged two left and right wrapping plates 801 that move horizontally, and two front and rear wrapping plates 802 that move longitudinally. When the material receiving platform 3 drives the material to move above the wrapping mechanism 8, the cling film will be lifted up and stretched upward together, and the two left and right wrapping plates 801 move toward each other to wrap the left and right sides of the cling film around the bottom of the material, and the two front and rear wrapping plates 802 move toward each other to wrap the front and rear sides of the cling film around the bottom of the material. The panel 803 is respectively provided with a first wrapping motor 804 and a second wrapping motor 805 for driving the left and right wrapping plates 801 and the front and rear wrapping plates 802, both of which are driven by synchronous wheels and synchronous belts. The front and rear wrapping plates 802 have a heat sealing function, and the front and rear wrapping plates 802 will be heated while wrapping for preliminary heat sealing to prevent the cling film from loosening and leaking.

[0074] When the left and right covering plates 801 are covering the cling film 15, the left and right clamps 705 below the clamping plate 701 first loosen the cling film 15 so that the cling film 15 can be wrapped in the middle. When the front and rear covering plates 802 are covering the cling film 15, the middle clamp below the clamping plate 701 loosens the cling film 15 again.

[0075] like Fig.18 As shown, a buffer structure is arranged between the synchronous wheel and the driven wheel, and the buffer structure includes a buffer plate 810 coaxially arranged on the side wall of the synchronous wheel. The buffer plate 810 is connected to the rotating shaft of the driven wheel through a key groove, so that the driven wheel and the buffer plate rotate synchronously. The synchronous wheel and the buffer plate 810 are connected by a buffer tension spring 811. When the covering motor drives the synchronous wheel to rotate through the synchronous belt, the synchronous wheel drives the buffer plate 810 to rotate through the buffer tension spring 811. The buffer plate 810 is provided with a buffer groove 812 for the movement of the protrusion connected to the buffer tension spring 811 on the synchronous wheel. By setting the buffer structure, the synchronous wheel can still rotate to a certain angle when the covering plate is clamped, so as to avoid being clamped and causing damage to the motor.

[0076] like Fig.19 As shown, a structure for guiding the left and right covering plates 801 and the front and rear covering plates 802 is provided on the panel 803. Left and right covering guide rods and left and right covering guide plates are provided on both sides of the left and right covering plates 801, respectively. One side of the two left and right covering plates 801 is slidably connected to the left and right covering guide rods through linear bearings, and the other side is provided with guide wheels, which slide on the side walls of the left and right covering guide plates. Plates are provided on the upper and lower sides of the guide wheels to clamp the left and right covering guide plates so that the left and right covering plates slide on the left and right covering guide plates; front and rear covering guide grooves are provided on both sides of the front and rear covering plates 802, respectively, and nylon plates inserted into the front and rear covering guide grooves are provided on both sides of the front and rear covering plates, so that they slide in the front and rear covering guide grooves.

[0077] like Figure 3 , Fig. 20 , Fig.21 As shown, the transverse film-pulling mechanism is used to clamp the transverse ends of the cling film 15, and the transverse film-pulling mechanism includes a side-pulling film assembly 9 respectively arranged on the left and right sides of the frame 16, and the side-pulling film assembly 9 includes a side-pulling support plate 901 fixed on the frame 16, and a side-pulling connecting plate 902 is movably arranged on the side-pulling support plate 901. A rotating block 903 is connected between the upper and lower ends of the side-pulling connecting plate 902 and the side-pulling support plate 901, and the two ends of the rotating block 903 are respectively rotatably connected to the side-pulling support plate 901 and the side-pulling connecting plate 902, and also includes a side-pulling cylinder 904, and the piston rod of the side-pulling cylinder 904 is connected to the upper rotating block 903. When the side-pulling cylinder 90 When the side pull connecting plate 902 is extended upward, the rotating block 903 rotates upward, thereby lifting the side pull connecting plate 902 upward. The side pull connecting plate 902 is rotatably connected with a side pull movable plate 905. A side pull clamping plate 906 is also arranged on the top of the side pull movable plate 905. When the side pull cylinder 904 drives the side pull connecting plate 902 to move upward, the side pull clamping plate 906 moves upward to abut against the left and right covering plates 801, thereby clamping the lateral ends of the cling film 15 to improve the stability of the cling film 15. When the material receiving platform 3 moves upward, the left and right covering plates 801 will move outward first to tighten the cling film 15, and then cover it when the material receiving platform 3 moves to the highest point.

[0078] A top block 907 is raised at one end of the side-pull clamping plate 906. When the side-pull clamping plate 906 abuts against the left and right covering plates 801, the top block 907 abuts against the edges of the left and right covering plates 801. When the left and right covering plates 801 move to both sides, the side-pull connecting plate 902 and the side-pull movable plate 905 will rotate accordingly (because the side-pull movable plate 905 is in contact with the film-coated plate). The rotation of the side-pull connecting plate 902 is because it needs to follow the lateral movement of the film-coated plate, and the rotation of the side-pull movable plate 905 is to always keep the contact surface flush with the covering plate.

[0079] like Figure 1 As shown, a heating component is arranged on the frame 16, and the heating component includes a heating sheet arranged on the top of the frame 16, and also includes a heating plate 13 covering the heating sheet. The heating plate 13 plays a heat-conducting role. When the material is coated, the material is placed on the heating plate 13 so that the cling film 15 at the bottom of the material is heat-sealed again, and the surface of the heating plate 13 is treated with anti-adhesive to prevent the cling film 15 from sticking to the heating plate 13.

[0080] The working process of the utility model is as follows:

[0081] (1) The staff places the packaging tray loaded with fruits, vegetables or meat on the loading platform 201, and the weighing sensor measures the weight and the printer 14 prints the label.

[0082] (2) After the first film-pulling assembly 7 moves to the rack of the fixed film plate 606 to clamp the cling film 15, the cling film 15 is pulled out to cover the top of the material receiving table 3. The second film-pulling assembly 10 clamps the other end of the cling film 15 to clamp the two longitudinal ends of the cling film 15. The transverse film-pulling mechanism cooperates with the left and right covering plates 801 to clamp the two transverse ends of the cling film 15. The film cutting mechanism 6 cuts and separates this section of cling film 15 from the whole.

[0083] (3) The longitudinal moving component 4 and the vertical moving component 5 drive the material receiving platform 3 to move. The material receiving platform 3 first moves to the bottom of the loading platform 201, moves upward to transfer the packaging tray at the loading platform 201 to the material receiving platform 3, and then moves inward back to its original position, and then moves upward to make the packaging tray protrude above the covering mechanism 8. At this time, the plastic wrap 15 covers the top of the packaging tray.

[0084] (5) The two left and right covering plates 801 move toward each other to cover the left and right sides of the plastic wrap 15 on the bottom of the material, and the two front and rear covering plates 802 move toward each other to cover the front and rear sides of the plastic wrap 15 on the bottom of the material to complete the covering work. Finally, the staff places the packaging tray on the heating plate 13 and heat-seals the plastic wrap 15 on the bottom of the packaging tray.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. A vertical naked bagging machine, characterized in that: The invention comprises a frame, on which are arranged: The weighing mechanism comprises a loading platform for placing materials, and a weighing sensor is arranged under the loading platform; The material moving mechanism comprises a material receiving platform for driving the material to move, a longitudinal moving assembly for driving the material receiving platform to move in the longitudinal direction, and a vertical moving assembly for driving the material receiving platform to move in the vertical direction; The film placing assembly comprises two film placing rollers parallel to each other, the cling film is placed between the two film placing rollers, and also comprises two side stop rollers arranged along the length direction of the film placing rollers, the side stop rollers are respectively attached to the two ends of the cling film; The longitudinal film-pulling mechanism comprises a first film-pulling assembly and a second film-pulling assembly which are slidably arranged, wherein the first film-pulling assembly clamps the end of the cling film and moves longitudinally to cover the top of the material receiving platform with the cling film, and the second film-pulling assembly is used to clamp the cling film on the other side of the material receiving platform; A film cutting mechanism, which cuts the cling film when the second film pulling assembly clamps the cling film; The transverse film-pulling mechanism is used to clamp the transverse ends of the cling film, and includes side film-pulling components respectively arranged on the left and right sides of the frame; The covering mechanism includes two left and right covering plates that move horizontally, and two front and rear covering plates that move longitudinally. When the material supporting platform drives the material to move above the covering mechanism, the two left and right covering plates move toward each other to cover the left and right sides of the cling film on the bottom of the material, and the two front and rear covering plates move toward each other to cover the front and rear sides of the cling film on the bottom of the material.

2. A vertical naked packaging machine according to claim 1, characterized in that: A plurality of bearing rods are arranged at intervals on the loading platform, and materials are placed on the bearing rods. A plurality of bearing blocks are arranged at intervals on the loading platform, and the bearing blocks are staggered with the bearing rods. The bearing blocks are rotatably connected to the loading platform, and the rotating axes of the bearing blocks are arranged longitudinally. When the two left and right covering plates move toward each other, the bearing blocks rotate to give way.

3. A vertical naked packaging machine according to claim 2, characterized in that: A limit block is movably arranged on the loading platform, and the limit block protrudes above the bearing block to prevent the material from sliding down. When the bearing platform moves upward, the limit block will be pressed down, and a connecting rod assembly for driving the limit block to move is arranged on the bearing platform.

4. A vertical naked packaging machine according to claim 3, characterized in that: The connecting rod assembly includes an upper rod and a lower rod rotatably connected to the material bearing platform, the other ends of the upper rod and the lower rod are rotatably connected to the limit block, the material bearing platform is located below the lower rod and is rotatably connected to a driving rod, a connecting rod is connected between the driving rod and the lower rod, a connecting rod protrusion is provided on the frame, when the material bearing platform moves upward, the driving rod abuts against the connecting rod protrusion and is pressed downward, the connecting rod drives the lower rod to rotate downward, thereby driving the limit block to move downward; a reset tension spring is connected between the upper rod and the lower rod, and when the reset tension spring is in an initial state, the limit block protrudes above the bearing block.

5. A vertical naked packaging machine according to claim 2, characterized in that: The longitudinal moving component includes a longitudinal sliding rod and a longitudinal driving motor. The longitudinal sliding rod is slidably connected with a longitudinal connecting piece, and a cam groove is provided on the longitudinal connecting piece. The material receiving platform has a cam follower protruding toward the cam groove. The longitudinal driving motor drives the longitudinal connecting piece to slide on the longitudinal sliding rod, and cooperates with the cam groove and the cam follower to drive the material receiving platform to move longitudinally.

6. A vertical naked packaging machine according to claim 3, characterized in that: The vertical moving assembly includes a vertical sliding rod and a vertical driving motor. The vertical sliding rod is slidably connected to a lifting platform, and a longitudinal guide rod is provided on the lifting platform. The material receiving platform is slidably connected to the longitudinal guide rod and thus connected to the lifting platform. The vertical driving motor drives the lifting platform to slide on the vertical sliding rod, thereby driving the material receiving platform to move in the vertical direction.

7. A vertical naked packaging machine according to claim 1, characterized in that: The film cutting mechanism comprises a film cutting support plate, on which a film cutting knife is movably arranged, the film cutting knife is arranged to extend in a transverse direction, the film cutting knife moves in a vertical direction to cut the cling film, and a film cutting cylinder for driving the film cutting knife to move is arranged on the film cutting support plate.

8. A vertical naked packaging machine according to claim 7, characterized in that: A fixed film plate is arranged below the film cutting support plate, and a movable film plate is movably arranged on the frame. The front ends of the fixed film plate and the movable film plate are in the shape of a rack. A film feeding roller is rotatably connected to the film cutting support plate. After the cling film passes through the film feeding roller, it is attached to the bottom of the fixed film plate. The movable film plate moves forward and clamps the cling film in place with the fixed film plate.

9. A vertical naked packaging machine according to claim 8, characterized in that: The first film-pulling assembly includes a film-pulling plate extending in a transverse direction, a middle clamp is provided in the middle of the film-pulling plate, left and right clamps are provided on both sides of the middle clamp, the middle clamp and the left and right clamps are composed of a plurality of clamps, the clamps extend into the rack interval of the fixed film plate to clamp the cling film, the film-pulling plate is provided with a first cylinder for driving the middle clamp and a second cylinder for driving the left and right clamps, the frame is provided with a film-pulling drive motor for driving the first film-pulling assembly to move longitudinally, a synchronous belt is connected to the film-pulling drive motor, one side of the first film-pulling assembly is fixed on the synchronous belt, and the film-pulling drive motor drives the first film-pulling assembly to move via the synchronous belt.

10. The vertical naked packaging machine according to claim 1, characterized in that: The side-pull film assembly includes a side-pull support plate fixed on the frame, a side-pull connecting plate movably arranged on the side-pull support plate, a rotating block is connected between the upper and lower ends of the side-pull connecting plate and the side-pull support plate, both ends of the rotating block are rotatably connected, and also includes a side-pull cylinder, the piston rod of the side-pull cylinder is connected to the upper rotating block, and a side-pull clamping plate is also connected to the side-pull connecting plate. When the side-pull cylinder drives the side-pull connecting plate to move upward, the side-pull clamping plate abuts and cooperates with the left and right covering plates, thereby clamping the lateral ends of the cling film.

11. A vertical naked packaging machine according to claim 1, characterized in that: The covering mechanism comprises a panel, on which a first covering motor and a second covering motor for driving left and right covering plates and front and rear covering plates are respectively arranged, and the front and rear covering plates have a heat sealing function.

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