Cutting and sealing device of tray preservative film packaging machine

Abstract

The invention relates to the technical field of packaging, in particular to a cutting and sealing device of a tray preservative film packaging machine. A mounting frame is arranged at the upper end of a packaging machine body, a pushing device is arranged in the mounting frame, a crossing beam is fixedly mounted at the top end of the mounting frame, and a lantern ring located above the pushing device is arranged on the crossing beam; an outer gear ring is arranged on the outer side face of the lower end of the lantern ring, an extension ring is fixedly installed at the top end of the lantern ring, an annular groove is formed in the top end of the extension ring, a cutting and sealing motor is installed at the bottom end of the extension ring, a clamping strip located in the annular groove is fixedly installed on the cutting and sealing motor, and a surrounding gear meshed with the outer gear ring is fixedly installed on a lower end shaft of the cutting and sealing motor. A rolling wheel and a cutting blade which are located below the surrounding gear are fixedly mounted on a lower end shaft of the cutting and sealing motor, a film covering mechanism located below the lantern ring is arranged on the mounting frame, and a tray box is arranged on the pushing device. According to the device, the situation that the bottom face of the tray box is uneven can be avoided, and the stability of the tray box is improved.

Description

Technical Field

[0001] The invention relates to the technical field of packaging, and in particular to a cutting and sealing device of a tray cling film packaging machine. Background Art

[0002] Fresh fruits, vegetables, fresh meat and other commodities need to be wrapped with plastic wrap when they are sold. Therefore, the tray plastic wrap packaging machine is widely used in fresh food packaging. It can automatically wrap the plastic wrap on the food to extend its shelf life and prevent contamination. The fully automatic plastic wrap packaging machine generally includes a film feeding mechanism, a longitudinal sealing mechanism, a cutting mechanism and a transverse sealing mechanism which are connected in sequence through a tray conveying mechanism. Its main working process is: the film feeding mechanism conveys the plastic wrap and covers it on the tray, the longitudinal sealing mechanism puts the plastic wrap reserved on the left and right sides of the tray close to the bottom of the tray to complete the longitudinal sealing, the tray after longitudinal sealing is conveyed to the cutting mechanism, the plastic wrap is cut and the front and rear lengths are reserved, and finally it is conveyed to the transverse sealing mechanism to put the front and rear reserved plastic wrap close to the bottom of the tray to complete the transverse sealing.

[0003] After the existing packaging machine presses the plastic wrap into the bottom of the tray from top to bottom to cover the film, the longitudinal sealing mechanism and the transverse sealing mechanism press the plastic wrap reserved at the bottom of the tray tightly against the bottom of the tray to complete the cutting and sealing. However, after cutting and sealing, the intersection of the plastic wrap at the bottom of the tray will form overlapping strips, making the middle of the bottom side of the tray high and the two sides low, resulting in an uneven situation. When the tray is placed on a display table or a table, it will tilt and even have the risk of sliding or tipping over, which also affects the appearance of the tray after packaging. After some packaging machines pack the tray, the tray needs to be manually taken out, which increases the operating risk of personnel.

[0004] Therefore, the present invention provides a cutting and sealing device for a tray cling film packaging machine to solve the above problems. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a cutting and sealing device for a tray cling film packaging machine, which effectively solves the problem that the existing packaging machine becomes uneven after cutting and sealing the cling film on the bottom of the tray, resulting in the risk of slipping or tipping over when the tray is placed on a display stand or a table.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A cutting and sealing device for a tray cling film packaging machine comprises a packaging body, a mounting frame is provided at the upper end of the packaging body, a pushing device is provided inside the mounting frame, a cross beam is fixedly installed on the top of the mounting frame, a sleeve located above the pushing device is provided on the cross beam, an outer gear ring is provided on the outer side surface of the lower end of the sleeve, an extension ring is fixedly installed on the top of the sleeve, an annular groove is provided on the top of the extension ring, a cutting and sealing motor is installed on the bottom end of the extension ring, a clamping strip located in the annular groove is fixedly installed on the cutting and sealing motor, an encircling gear meshing with the outer gear ring is fixedly installed on the lower end shaft of the cutting and sealing motor, a rolling wheel and a cutting blade located below the encircling gear are fixedly installed on the lower end shaft of the cutting and sealing motor, a laminating mechanism located below the sleeve ring is provided on the mounting frame, and a tray box is provided on the pushing device.

[0007] Preferably, the front and rear ends of the packaging body are respectively fixedly installed with clamps, the mounting frame is fixedly installed on the top of the two clamps, a conveyor belt wheel group located below the mounting frame is installed between the two clamps, and a first motor is installed on the rear side of the packaging body.

[0008] Preferably, the pushing device includes a placement box, a placement box is fixedly installed on the clamping plate located on the front side, a push plate is slidably installed inside the placement box, the tray box is arranged inside the placement box, a bending plate is fixedly installed at the front end of the placement box, a push tray telescopic rod is installed on the bending plate, and a control console is provided on one side of the placement box.

[0009] Preferably, two lifting plates are provided between the two clamping plates, sliding blocks are slidably installed on the front and rear ends of the two lifting plates, a lifting telescopic rod is fixedly installed on each sliding block, and separation plates are respectively installed on the two lifting plates, a square hole is opened in the middle of the mounting frame, and friction patterns are arranged on the top surface of each separation plate.

[0010] Preferably, the laminating mechanism comprises a cling film roller, a cling film roller is rotatably mounted on the rear end of the mounting frame, a winding roller is rotatably mounted on the front end of the mounting frame, and a sprocket group is connected between the cling film roller and the winding roller.

[0011] Preferably, a bottom block is fixedly installed on the right end of the cross beam, a driving sprocket engaged with the sprocket group is rotatably installed on the bottom block, a top block located above the bottom block is fixedly installed on the right end of the cross beam, a one-way component is provided on the right end of the top block, a lifting and telescopic rod is fixedly installed on the top of the cross beam, a lap plate is fixedly installed on the top of the lifting and telescopic rod, a lifting shaft is connected between the ring and the lap plate, a guide bar is fixedly installed on the lifting shaft, a linkage rack extending downward is fixedly installed on the guide bar, and a linkage gear engaged with the linkage rack is installed on the right end of the top block.

[0012] Preferably, pushing racks are slidably installed on the ends of the two lifting plates that are away from each other, and a reset spring is fixedly installed on the lower end of each pushing rack. A driving gear that meshes with the corresponding pushing rack is rotatably installed on the lower end of each lifting plate. Reset openings are respectively opened on the ends of the two lifting plates that are close to each other, and each separation plate is arranged in the corresponding reset opening, and a driven rack that meshes with the corresponding driving gear is fixedly installed on each separation plate.

[0013] Preferably; a stabilizing frame is fixedly installed on the clamping plate located on the rear side, an extension block is fixedly installed on the rear end of the mounting frame, a sliding rod that slides up and down is installed on the extension block, a first rack extending backward is fixedly installed on the lifting plate located on the left side, a second rack extending backward is fixedly installed on the lifting plate located on the right side, a self-rotating gear located between the first rack and the second rack is rotatably installed on the sliding rod, and a synchronous motor is fixedly installed on the sliding rod.

[0014] Preferably, the one-way component includes a one-way ring, a limiting block is fixedly installed on the right end of the cross beam, the one-way ring is rotatably installed on the limiting block, the outer side of the one-way ring is provided with external teeth, a synchronous gear meshing with the external teeth is coaxially fixedly installed on the driving sprocket, the inner side of the one-way ring is provided with internal teeth, a one-way disk is rotatably installed inside the one-way ring, a locking tooth is rotatably installed on the right end of the one-way disk, and a positioning shaft and a top pressure spring are provided at the right end of the one-way disk.

[0015] Preferably, each lifting plate is provided with a telescopic push rod, and protective plates are respectively provided on the left and right sides of the mounting frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The cling film can be cut by the coordinated use of the sleeve ring, cutting and sealing motor, roller wheel, surrounding gear and cutting blade. The cling film at the cut part will be attached to the outer surface of the upper half of the tray box, avoiding the unevenness of the bottom surface of the tray box, improving the stability of the tray box, effectively extending the shelf life of the food, maintaining the freshness and nutrition of the food, and improving the appearance of the packaged food.

[0017] 2. Through the coordinated use of the winding roller, sprocket set and cling film roller, the cling film can be automatically replaced, which improves the packaging efficiency, reduces labor costs and manual contact, reduces the risk of cross contamination, and ensures the hygiene and safety of food.

[0018] 3. Through the coordinated use of the telescopic rod, the lifting plate, the separation plate, the synchronous motor, the self-rotating gear, the first rack, and the second rack, the packaged pallet boxes can be automatically unloaded, which ensures the safety of personnel and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The three-dimensional state of the present invention is shown in FIG. Figure 1 ; Figure 2 The three-dimensional state of the present invention is shown in FIG. Figure 2 ; Figure 3 For the present invention Figure 1 Sectional three-dimensional Figure 1 ; Figure 4 For the present invention Figure 1 Sectional three-dimensional Figure 2 ; Figure 5 It is a schematic diagram of the structure of the mounting frame of the present invention; Figure 6 It is a schematic diagram of the installation position of the collar of the present invention; Figure 7 It is a schematic diagram of the lifting plate structure of the present invention; Figure 8 It is a schematic diagram of the installation position of the lifting telescopic rod of the present invention; Fig. 9 It is a schematic diagram of the one-way component structure of the present invention; Fig.10 It is a schematic diagram of the structure of the surrounding gear, roller wheel and cutting blade of the present invention; Fig.11 For the present invention Figure 3 A is an enlarged schematic diagram; Fig.12 For the present invention Figure 5 The enlarged schematic diagram of point B in FIG. Fig.13 For the present invention Figure 8 The enlarged schematic diagram of point C in FIG. Fig.14 It is a schematic diagram of the card strip structure of the present invention.

[0020] Markings in the figure: 1. packaging machine body; 2. mounting frame; 3. cross beam; 4. sleeve ring; 5. outer gear ring; 6. extension ring; 7. annular groove; 8. cutting and sealing motor; 9. clamping strip; 10. surrounding gear; 11. roller pressing wheel; 12. cutting blade; 13. tray box; 14. clamping plate; 15. conveyor belt wheel group; 16. first motor; 17. placement box; 18. push plate; 19. bending plate; 20. push plate telescopic rod; 21. control console; 22. lifting plate; 23. sliding block; 24. lifting telescopic rod; 25. separation plate; 26. square hole; 27. friction pattern; 28. cling film roller; 29. ​​winding roller; 30. sprocket group; 31. bottom block; 32. drive Sprocket; 33, top block; 34, lifting and telescopic rod; 35, lap plate; 36, lifting shaft; 37, guide bar; 38, linkage rack; 39, linkage gear; 40, pushing rack; 41, reset spring; 42, driving gear; 43, reset port; 44, driven rack; 45, stabilizing frame; 46, extension block; 47, sliding rod; 48, first rack; 49, second rack; 50, self-rotating gear; 51, synchronous motor; 52, one-way ring; 53, external teeth; 54, synchronous gear; 55, internal teeth; 57, one-way disk; 58, latching teeth; 59, positioning shaft; 60, top pressure spring; 61, pushing telescopic rod; 62, protective plate; 63, limiting block. DETAILED DESCRIPTION

[0021] Refer to the following Figures 1 to 14 The embodiments of the present invention are described in detail. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0022] A cutting and sealing device for a tray cling film packaging machine, such as Figure 1 , Figure 5 , Fig.10 , Fig.14As shown, it includes a packaging machine body 1, and a mounting frame 2 is provided at the upper end of the packaging machine body 1. The mounting frame 2 is a frame structure and is installed at the upper end of the packaging machine body 1. A pushing device is provided inside the mounting frame 2. A cross beam 3 is fixedly installed at the top of the mounting frame 2. The cross beam 3 is a "U"-shaped structure with an opening downward, and is fixedly installed on the left and right top ends of the mounting frame 2. A collar 4 located above the pushing device is provided on the cross beam 3. The collar 4 is arranged between the cross beam 3 and the pushing device. The inner surface of the collar 4 is a smooth surface, which will not form a situation of being tightly attached to the cling film, nor will it absorb the cling film. Fresh film, an outer gear ring 5 is coaxially fixed on the outer side surface of the lower end of the ring 4, an extension ring 6 extending outward is fixedly installed on the top of the ring 4, an annular groove 7 is provided on the top of the extension ring 6, a cutting and sealing motor 8 is slidably installed on the bottom surface of the extension ring 6, the cutting and sealing motor 8 is slidably connected to the outer side surface of the ring 4, a clamping strip 9 is fixedly installed on the cutting and sealing motor 8, the other end of the clamping strip 9 is slidably connected to the inside of the annular groove 7, and the bending surface of the clamping strip 9 is in sliding contact with the outer side surface of the extension ring 6, the setting of the clamping strip 9 can keep the cutting and sealing motor 8 motionless during the movement The sealing motor 8 has a coaxially fixed lower shaft with a surrounding gear 10 meshing with the outer gear ring 5, and a coaxially fixed lower shaft with a roller pressure wheel 11 located below the surrounding gear 10. The top surface of the roller pressure wheel 11 contacts the bottom surface of the sleeve ring 4, and the outer diameter of the roller pressure wheel 11 contacts the inner diameter of the sleeve ring 4 tangentially. The roller pressure wheel 11 is made of a suitable rubber material. The sealing motor 8 has a coaxially fixed lower shaft with a cutting wheel located below the roller pressure wheel 11. A cutting blade 12 is coaxially fixed on the outer side of the cutting wheel. The cutting blade 12 is an annular structure. The outer diameter of the blade 12 is the same as the outer diameter of the roller pressing wheel 11, and the cutting wheel is arranged away from the roller pressing wheel 11. When in use, the cutting blade 12 and the roller pressing wheel 11 of appropriate specifications are selected. The mounting frame 2 is provided with a laminating mechanism located below the collar 4. The pushing device is provided with a tray box 13. The tray box 13 selects an existing suitable round object. The inner diameter of the collar 4 is larger than the outer diameter of the tray box 13. A gear lever is fixedly arranged at the top of the collar 4. The cutting and sealing motor 8 is connected to the controller and the power supply through a wire. (It should be noted that the telescopic rod in the device selects an electric telescopic rod or a pneumatic telescopic rod); The personnel place the tray box 13 on the pushing device, which pushes the tray box 13 to the lower middle part of the mounting frame 2 and the ring 4, and then drives the tray box 13 to gradually rise and contact the plastic wrap film, and continues to drive the tray box 13 to rise. Since the plastic wrap film has the characteristics of stretching and extension, the plastic wrap film at this time will be tightly attached to the top surface of the tray box 13, and the plastic wrap films on the front and rear sides of the tray box 13 will be in an inclined state until the bottom surface of the tray box 13 is flush with the top surface of the mounting frame 2 and then stops rising; then the ring 4 is gradually lowered and sleeved on the plastic wrap film of the tray box 13, and the ring 4 is continued to be lowered. The bottom surface of the ring 4 pushes the plastic wrap film to descend, and the plastic wrap film will be squeezed between the tray box 13 and the ring 4, so as to be attached to the outer surface of the tray box 13, and the bottom surface of the lever stops moving after contacting the top surface of the tray box 13, and the bottom surface of the ring 4 will stay at the upper half of the tray box 13; Turn on the power, the controller starts the cutting and sealing motor 8 to rotate, the roller 11, the surrounding gear 10, and the cutting blade 12 rotate synchronously, the surrounding gear 10 meshes with the outer gear ring 5 for circular motion, the card strip 9 carries the cutting and sealing motor 8 and slides along the circumference of the annular groove 7, the roller 11 rolls the cling film to the outer side of the tray box 13, and the cutting blade 12 can cut the cling film while moving around the tray box 13 in a circle. The cling film at the cut position will be attached to the outer side of the upper half of the tray box 13. The cling film has a sticky property and will be firmly attached. The plastic wrap is firmly attached to the top and side surfaces of the tray box 13. Due to the rolling of the plastic wrap by the roller 11 and the squeezing of the plastic wrap by the inner surface of the sleeve 4, the plastic wrap is tightly attached to the outer wall of the tray box 13, thereby improving the sealing performance of the tray box 13. When the cutting blade 12 cuts the plastic wrap in a circular process, the cut of the plastic wrap will be attached to the side surface of the tray box 13, thereby avoiding the unevenness of the bottom surface of the tray box 13, improving the stability of the tray box 13, effectively extending the shelf life of the food, and maintaining the freshness and nutrition of the food. After the tray box 13 is cut and sealed, the ring 4 is driven to rise to a suitable height, a circular hole is formed on the cling film below, and the tray box 13 is located in the circular hole, so that the tray box 13 can be taken out; If a vent hole is provided at the bottom of the tray box 13, since the plastic wrap only covers the upper half of the tray box 13 and does not cover the bottom of the tray box 13, air flow inside the tray box 13 is facilitated to prevent damage to the food.

[0023] like Figure 1 , Figure 2As shown, clamping plates 14 are fixedly installed on the front and rear sides of the top of the packaging machine body 1, and the bottom end of the mounting frame 2 is fixedly installed on the top of the two clamping plates 14. A conveyor belt wheel group 15 located below the mounting frame 2 is installed between the two clamping plates 14. The conveyor belt wheel group 15 includes two conveyor rollers and a conveyor belt. Conveyor rollers are rotatably installed on the left and right ends of the two clamping plates 14, and a conveyor belt is installed between the two conveyor rollers. A first motor 16 is fixedly installed on the rear side of the packaging machine body 1. The rotating shaft of the first motor 16 is coaxially fixedly connected to one of the conveyor rollers, and the first motor 16 is connected to a controller and a power supply. After the tray box 13 is cut and sealed, the ring 4 is driven to rise to a suitable height, a circular hole is formed on the cling film below, and the tray box 13 is located in the circular hole, so that the tray box 13 falls on the conveyor belt, and the controller starts the first motor 16, and the two conveyor rollers rotate with the conveyor belt to convey the tray box 13 out. In this way, there is no need for personnel to manually take out the tray box 13, which improves safety and reduces the work intensity of personnel.

[0024] like Figure 3 , Fig.11 As shown, the pushing device includes a placement box 17, a placement box 17 is fixedly installed on the front end of the clamping plate 14 on the front side, a pushing plate 18 is slidably installed inside the placement box 17, an unused tray box 13 is placed inside the placement box 17, a bending plate 19 is fixedly installed on the front end of the placement box 17, a push plate telescopic rod 20 is fixedly installed on the bending plate 19, an insertion hole corresponding to the push plate telescopic rod 20 is opened at the front end of the placement box 17, the telescopic end of the push plate telescopic rod 20 passes through the insertion hole and is fixedly connected to the pushing plate 18, a control console 21 is provided on one side of the placement box 17, the push plate telescopic rod 20 is connected to the controller and the power supply, the control console 21 is connected to the controller, and personnel operate the controller through the control console 21; like Figure 5 , Figure 6 , Figure 7As shown, two lifting plates 22 are arranged between the two clamping plates 14, and the lifting plates 22 can move up and down freely. Built-in grooves are respectively provided on the front and rear ends of the two lifting plates 22, and sliding blocks 23 are installed inside the built-in grooves for sliding left and right. Two slider grooves are respectively provided at the upper ends of the two clamping plates 14. Under normal conditions, the sliding blocks 23 are installed in the slider grooves, and the telescopic ends of each lifting telescopic rod 24 are fixedly installed on the corresponding sliding blocks 23. The top ends of the four lifting telescopic rods 24 are respectively fixedly installed on the mounting frame 2, and separation plates 25 are respectively installed on the two lifting plates 22. The separation plates 25 can slide freely up and down, and a square hole 26 is provided in the middle part of the mounting frame 2. Friction lines 27 are provided on the top surface of each separation plate 25. Under normal conditions, the top surface of the separation plate 25 is flush with the top surface of the lifting plate 22, and the top surface of the lifting plate 22 is flush with the inner surface of the placement box 17. The lifting telescopic rod 24 is connected to the controller and the power supply. The personnel put the tray box 13 into the placing box 17, and the controller starts the tray pushing telescopic rod 20. The tray pushing telescopic rod 20 pushes the tray box 13 to the middle of the contact end of the two separation plates 25 through the pushing plate 18. The tray box 13 is located directly below the collar 4. Since the bottom of the tray box 13 is in contact with the friction pattern 27, the tray box 13 will not move around. The controller starts the four lifting telescopic rods 24. The four lifting telescopic rods 24 gradually rise with the two lifting plates 22 and the separation plate 25 until the tray box 13 is inserted into the square hole 26. Then, the ring 4 is gradually lowered to the cling film on the tray box 13. The bottom surface of the ring 4 pushes the cling film down. The cling film will be squeezed into between the tray box 13 and the ring 4 and attached to the outer surface of the tray box 13. The bottom surface of the lever contacts the top surface of the tray box 13 and then stops moving. The bottom surface of the ring 4 will stay in the upper half of the tray box 13. In this way, the tray box 13 can be automatically lifted and lowered, thereby completing the packaging of the tray box 13 and improving the packaging efficiency.

[0025] like Figure 5 , Figure 6 As shown, the laminating mechanism includes a cling film roller 28, and mounting holes are respectively opened on the front and rear sides of the square hole 26, and the mounting holes are arranged on the mounting frame 2. The cling film roller 28 is rotatably installed in the mounting hole on the rear side, and the cling film is arranged on the cling film roller 28. A winding roller 29 is rotatably installed in the mounting hole on the front side, and a sprocket group 30 is connected between the cling film roller 28 and the winding roller 29. The sprocket group 30 includes two sprockets and a chain. Long strip holes are respectively opened at the left and right ends of the mounting frame 2, and sprockets are coaxially fixedly installed at the left and right ends of the cling film roller 28 and the winding roller 29, respectively. The four sprockets are respectively arranged in the corresponding long strip holes, and chains are respectively connected between the two sprockets on the left and the two sprockets on the right. The personnel fix one end of the cling film on the winding roller 29 so that the cling film covers the upper end of the square hole 26, and then drive the tray box 13 to gradually rise and contact the cling film. The tray box 13 is continued to rise. Since the cling film has a stretching effect, the cling film at this time will be closely attached to the top surface of the tray box 13, and the cling films on the front and rear sides of the tray box 13 will be tilted until the bottom surface of the tray box 13 is flush with the top surface of the mounting frame 2 and then the rise is stopped. After the tray box 13 is cut and sealed, the ring 4 is driven to rise to a suitable height, a circular hole is formed on the cling film below, and the upper end of the tray box 13 is located in the circular hole, driving the tray box 13 to fall on the conveyor belt, and the controller starts the first motor 16. The two conveyor rollers rotate with the conveyor belt to transport the tray box 13 out, and then the sprocket group 30 rotates, and the used cling film is wound on the winding roller 29. At the same time, the cling film rotates with the cling film roller 28, and the unused cling film is covered on the upper end of the square hole 26 again, thereby completing the automatic replacement of the cling film, improving the packaging work efficiency, reducing labor costs, reducing manual contact, reducing the risk of cross contamination, and ensuring the hygiene and safety of food.

[0026] like Figure 5 , Figure 6 , Fig.12 As shown, a bottom block 31 is fixedly installed on the right end of the cross beam 3, and a driving sprocket 32 ​​meshing with the chain is rotatably installed on the bottom block 31, and the driving sprocket 32 ​​is always meshed with the chain. A top block 33 located above the bottom block 31 is fixedly installed on the right end of the cross beam 3, and a one-way component is provided on the right end of the top block 33. A lifting telescopic rod 34 is fixedly installed on the top of the cross beam 3, and the lifting telescopic rod 34 is connected to the controller and the power supply. A lap plate 35 is fixedly installed on the telescopic end of the lifting telescopic rod 34, and a lifting and lowering rod 34 is fixedly installed on the gear rod of the collar 4. Axle 36, the top of the lifting shaft 36 is fixedly installed on the lap plate 35, a guide hole is opened in the middle of the cross beam 3, and the lifting shaft 36 is slidably installed in the guide hole up and down, and a guide bar 37 located below the cross beam 3 is fixedly installed on the lifting shaft 36, and one end of the guide bar 37 is slidably installed on the right end of the cross beam 3 up and down, and a linkage rack 38 extending downward is fixedly installed on the guide bar 37, and the lower half of the linkage rack 38 is provided with teeth, and the upper half is smooth, and the right end of the top block 33 is rotatably installed with a linkage gear 39 meshing with the linkage rack 38; The controller starts the lifting and telescopic rod 34 to retract, and the lap plate 35 gradually moves downward with the lifting shaft 36 and the guide bar 37, and the linkage rack 38 meshes with the linkage gear 39 to rotate, and the one-way component remains stationary until the ring 4 is placed on the cling film of the tray box 13, and at the same time, the linkage gear 39 contacts the smooth surface of the linkage rack 38; When the packaging is completed, the controller starts the lifting and telescopic rod 34 to gradually extend upward, and the lap plate 35 gradually moves upward with the lifting shaft 36 and the guide bar 37, and the linkage gear 39 remains stationary. At the same time, the four lifting and telescopic rods 24 gradually descend with the two lifting plates 22, the separation plate 25, and the tray box 13. When the ring 4 is completely separated from the tray box 13, the linkage rack 38 engages with the linkage gear 39 to rotate in the opposite direction, and the one-way component rotates with the sprocket group 30. The used cling film is wound on the winding roller 29. At the same time, the cling film rotates with the cling film roller 28, and the unused cling film can be covered on the upper end of the square hole 26 again, thereby completing the automatic replacement of the cling film and improving work efficiency.

[0027] like Figure 7 , Figure 8 , Fig.13 As shown, a pushing rack 40 is respectively installed on the ends of the two lifting plates 22 that are away from each other and slide up and down, and a pushing rack 40 is respectively slidably connected on the outer end of each lifting plate 22, and a return spring 41 is fixedly installed on the bottom end of each pushing rack 40, and the top end of each return spring 41 is fixedly installed on the bottom end of each lifting plate 22, and two positioning blocks are fixedly installed on the bottom end of each lifting plate 22, and a driving gear 42 meshing with the pushing rack 40 is rotatably installed on each positioning block, and a reset opening 43 is respectively opened on the ends of the two lifting plates 22 that are close to each other, and two front and rear corresponding limiting holes are opened on the outer side of each reset opening 43, and each separation plate 25 is arranged in the corresponding reset opening 43, and a driven rack 44 extending downward is respectively fixedly installed on the front and rear ends of each separation plate 25, and each driven rack 44 is meshed and connected with the corresponding driving gear 42; The controller starts the four lifting telescopic rods 24, and the four lifting telescopic rods 24 gradually rise with the two lifting plates 22 and the separation plate 25, and the top ends of the four pushing racks 40 contact the bottom surface of the mounting frame 2. With the continuous rise of the lifting plate 22 and the blocking of the mounting frame 2, the four pushing racks 40 slide downward and mesh with the driving gear 42 to rotate, the return spring 41 is gradually stretched, the driving gear 42 meshes with the driven rack 44 to move upward, and the two separation plates 25 rise with the tray box 13 into the square hole 26, thereby completing the rise of the tray box 13; When the tray box 13 is packed, the controller starts the four telescopic lifting rods 24, and the four telescopic lifting rods 24 gradually descend with the two lifting plates 22 and the separation plate 25. Due to the reset force of the reset spring 41, the four push racks 40 engage the driving gear 42 to rotate in the opposite direction, and the driving gear 42 engages the driven rack 44 to move downward, so that the separation plate 25 descends with the tray box 13 to a suitable degree, and finally the tray box 13 is taken out.

[0028] like Figure 2 , Figure 5 , Figure 7 As shown, a stabilizing frame 45 is fixedly installed on the clamping plate 14 on the rear side, and the stabilizing frame 45 is fixedly connected to the cross beam 3, thereby improving the stability of the cross beam 3. An extension block 46 is fixedly installed on the rear end of the mounting frame 2, and a sliding rod 47 that slides up and down is installed on the extension block 46. The sliding rod 47 can only slide up and down along the extension block 46. A first rack 48 extending backward is fixedly installed on the rear end of the lifting plate 22 on the left side, and a second rack 49 extending backward is fixedly installed on the rear end of the lifting plate 22 on the right side. The tooth surfaces of the first rack 48 and the second rack 49 correspond to each other. A self-rotating gear 50 meshing with the first rack 48 and the second rack 49 is rotatably installed on the sliding rod 47. A synchronous motor 51 is fixedly installed on the sliding rod 47. The rotating shaft of the synchronous motor 51 is coaxially and fixedly connected with the self-rotating gear 50, and the synchronous motor 51 is connected to a controller and a power supply. When the four telescopic lifting rods 24 gradually descend to a suitable degree with the two lifting plates 22 and the separation plate 25 and then stop moving, the synchronous motor 51 is controlled to start rotating, and the self-rotating gear 50 engages with the first rack 48 and the second rack 49 to move away from each other, thereby driving the two lifting plates 22 away from each other, and the tray box 13 falls from between the two separation plates 25 to the conveyor belt, thereby realizing automatic unloading of the packaged tray boxes 13, ensuring the safety of personnel, and improving work efficiency.

[0029] like Figure 4 , Figure 5 , Fig. 9 , Fig.12 As shown, the one-way component includes a one-way ring 52, a limiting block 63 is fixedly installed on the right end of the cross beam 3, the one-way ring 52 is rotatably installed on the limiting block 63, a plurality of external teeth 53 are evenly arranged on the circumferential surface of the one-way ring 52, a synchronous gear 54 meshing with the external teeth 53 is coaxially fixedly installed on the drive sprocket 32, a rotation shaft is rotatably installed on the bottom block 31, the drive sprocket 32 ​​and the synchronous gear 54 are coaxially fixedly installed on the rotation shaft, and the synchronous gear 54 is arranged between the drive sprocket 32 ​​and the bottom block 31, and a plurality of internal teeth 55 are evenly fixedly arranged on the inner circumferential surface of the one-way ring 52 (the shape of the internal teeth 55, as shown in FIG. 1 ). Fig. 9 As shown in the figure, a self-rotating rod is rotatably mounted on the top block 33, a linkage gear 39 is coaxially fixedly mounted on the self-rotating rod, a one-way disc 57 is rotatably mounted inside the one-way ring 52, the one-way disc 57 is coaxially fixedly mounted on the self-rotating rod, a latching tooth 58 is rotatably mounted on the right end of the one-way disc 57, a positioning shaft 59 is fixedly mounted on the right end of the one-way disc 57, the positioning shaft 59 is arranged close to the edge of the one-way disc 57, a top pressure spring 60 is fixedly mounted on the positioning shaft 59, and the other end of the top pressure spring 60 is fixedly mounted on the latching tooth 58; The controller starts the lifting and telescopic rod 34 to retract, the lap plate 35 gradually moves downward with the lifting shaft 36 and the guide bar 37, the linkage rack 38 meshes with the linkage gear 39 to rotate, the one-way plate 57 with the latching teeth 58 constantly moves on each inner tooth 55, and the top pressure spring 60 is constantly compressed and reset, and the one-way ring 52 remains stationary until the ring 4 is set on the cling film of the tray box 13, and the linkage gear 39 contacts the smooth surface of the linkage rack 38; When the packaging is completed, the controller starts the lifting telescopic rod 34 to gradually extend upward, the lap plate 35 gradually moves upward with the lifting shaft 36 and the guide bar 37, the linkage gear 39 remains stationary, and at the same time, the four lifting telescopic rods 24 gradually descend with the two lifting plates 22, the separation plate 25, and the tray box 13. When the ring 4 is completely separated from the tray box 13, the linkage rack 38 engages with the linkage gear 39 to rotate in the opposite direction, the one-way disk 57 pushes the inner teeth 55 and the one-way ring 52 to rotate through the latch teeth 58, and the outer teeth 53 engage with the synchronous gear 54 to rotate, and the synchronous gear 54 drives the driving sprocket 32 ​​to rotate, and the driving sprocket 32 ​​engages with the sprocket group 30 to rotate. At this time, the used cling film is wound on the winding roller 29, and the unused cling film is covered on the upper end of the square hole 26 again, thereby completing the automatic replacement of the cling film without causing waste of the cling film.

[0030] like Figure 1 , Figure 7 As shown, the upper ends of the two lifting plates 22 that are away from each other are fixedly installed with protrusions, and the ends of the two protrusions that are close to each other are fixedly installed with pushing telescopic rods 61. The pushing telescopic rods 61 are connected to the controller and the power supply. When the separation plate 25 of the tray box 13 does not fall off, the controller starts the telescopic ends of the two pushing telescopic rods 61 to approach each other and extend, thereby pushing the tray box 13 to fall on the conveyor belt to prevent the tray box 13 from not falling automatically. Protective plates 62 are bolted to the left and right sides of the mounting frame 2, which improves the safety of the mounting frame 2.

[0031] Working principle of the present invention: The personnel put the tray box 13 into the placing box 17, and the controller starts the tray pushing telescopic rod 20, which pushes the tray box 13 to the middle of the contact end of the two separation plates 25 through the pushing plate 18. Then the controller starts the four lifting telescopic rods 24, and the four lifting telescopic rods 24 gradually rise with the two lifting plates 22 and the separation plate 25, and the sliding rod 47 slides upward on the extension block 46. At this time, the top of the four pushing racks 40 contacts the bottom surface of the mounting frame 2. With the continuous rise of the lifting plate 22 and the blocking of the pushing racks 40 by the mounting frame 2, the four pushing racks 40 slide downward and mesh with the driving gear 42 to rotate, the reset spring 41 is gradually stretched, and the driving gear 42 meshes with the driven rack 44 to move upward; Then, the two separation plates 25 drive the tray box 13 to gradually rise and contact the cling film. Since the cling film has the property of stretching and extending, the cling film will be closely attached to the top surface of the tray box 13, and the cling films on the front and rear sides of the tray box 13 will be tilted until the bottom surface of the tray box 13 is flush with the top surface of the mounting frame 2 and then the rise will stop. Then the controller starts the retraction of the lifting and telescopic rod 34, the lap plate 35 gradually moves downward with the lifting shaft 36 and the guide bar 37, the linkage rack 38 meshes with the linkage gear 39 to rotate, the one-way plate 57 and the latching tooth 58 keep moving on each inner tooth 55, and the top pressure spring 60 keeps compressing and resetting, and the one-way ring 52 remains stationary, then the collar 4 gradually descends and sleeves on the cling film of the tray box 13, at this time the linkage gear 39 and the linkage rack 38 are in smooth contact, and the collar 4 continues to descend, the bottom surface of the collar 4 pushes the cling film down, and the cling film will be squeezed between the tray box 13 and the collar 4, so as to be attached to the outer surface of the tray box 13, the bottom surface of the lever stops moving after contacting the top surface of the tray box 13, and the bottom surface of the collar 4 will stay at the upper half of the tray box 13; Turn on the power, the controller starts the cutting and sealing motor 8 to rotate, the roller 11, the surrounding gear 10, and the cutting blade 12 rotate synchronously, the surrounding gear 10 meshes with the outer gear ring 5 to move in a circle, the clamping strip 9 carries the cutting and sealing motor 8 and slides along the annular groove 7 in a circle, the roller 11 rolls the cling film to the outer side of the tray box 13, and the cutting blade 12 cuts the cling film during the circular movement around the tray box 13. Since the cling film has a sticky property, it will firmly adhere to the top and side surfaces of the tray box 13, avoiding the unevenness of the bottom surface of the tray box 13 and improving the stability of the tray box 13; When the packaging is completed, the controller starts the lifting telescopic rod 34 to gradually extend upward, the lap plate 35 gradually moves upward with the lifting shaft 36 and the guide bar 37, the linkage gear 39 remains stationary, and at the same time, the four lifting telescopic rods 24 gradually descend with the two lifting plates 22, the separation plate 25, and the tray box 13, and the sliding rod 47 slides downward on the extension block 46. When the ring 4 is completely separated from the tray box 13, the linkage rack 38 engages with the linkage gear 39 to rotate in the opposite direction, and the one-way component rotates with the sprocket group 30. The used cling film is wound on the winding roller 29, and at the same time, the cling film rotates with the cling film roller 28, and the unused cling film is covered on the upper end of the square hole 26 again, thereby completing the automatic replacement of the cling film and improving the work efficiency. At this time, the sliding block 23 is restored to the slider groove; Then, the synchronous motor 51 is controlled to start rotating, and the self-rotating gear 50 meshes with the first rack 48 and the second rack 49 to move away from each other, thereby driving the two lifting plates 22 to move away from each other, and the tray box 13 falls from the space between the two separation plates 25 to the conveyor belt and is transported to the outside. In this way, the packaged tray box 13 is automatically unloaded, which also ensures the safety of personnel and improves work efficiency.

[0032] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be fixed installation, detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A cutting and sealing device for a tray cling film packaging machine, comprising a packaging machine body (1), characterized in that: The packaging machine body (1) is provided with a mounting frame (2) at the upper end, a pushing device is provided inside the mounting frame (2), a cross beam (3) is fixedly installed at the top end of the mounting frame (2), a collar (4) located above the pushing device is provided on the cross beam (3), an outer toothed ring (5) is provided on the outer side surface of the lower end of the collar (4), an extension ring (6) is fixedly installed at the top end of the collar (4), an annular groove (7) is provided at the top end of the extension ring (6), and a toothed ring (5) is provided on the bottom end of the extension ring (6). A cutting and sealing motor (8) is provided, a clamping strip (9) located in an annular groove (7) is fixedly mounted on the cutting and sealing motor (8), a surrounding gear (10) meshing with an outer gear ring (5) is fixedly mounted on the lower end shaft of the cutting and sealing motor (8), a roller pressing wheel (11) and a cutting blade (12) located below the surrounding gear (10) are fixedly mounted on the lower end shaft of the cutting and sealing motor (8), a film laminating mechanism located below the sleeve ring (4) is provided on the mounting frame (2), and a tray box (13) is provided on the pushing device.

2. The cutting and sealing device of the tray cling film packaging machine according to claim 1, characterized in that: Clamps (14) are fixedly mounted on the front and rear ends of the packaging machine body (1), respectively; the mounting frame (2) is fixedly mounted on the top ends of the two clamps (14); a conveyor belt wheel group (15) located below the mounting frame (2) is mounted between the two clamps (14); and a first motor (16) is mounted on the rear side of the packaging machine body (1).

3. The cutting and sealing device of the tray cling film packaging machine according to claim 2, characterized in that: The pushing device comprises a placement box (17), the placement box (17) being fixedly mounted on the clamping plate (14) located at the front side, a pushing plate (18) being slidably mounted inside the placement box (17) forwards and backwards, the tray box (13) being arranged inside the placement box (17), a bending plate (19) being fixedly mounted at the front end of the placement box (17), a pushing tray telescopic rod (20) being mounted on the bending plate (19), and a control console (21) being arranged on one side of the placement box (17).

4. The cutting and sealing device of the tray cling film packaging machine according to claim 3, characterized in that: Two lifting plates (22) are provided between the two clamping plates (14), and sliding blocks (23) are slidably mounted on the front and rear ends of the two lifting plates (22), and a lifting telescopic rod (24) is fixedly mounted on each sliding block (23). Separation plates (25) are respectively mounted on the two lifting plates (22), and a square hole (26) is opened in the middle of the mounting frame (2), and a friction pattern (27) is arranged on the top surface of each separation plate (25).

5. The cutting and sealing device of a tray cling film packaging machine according to claim 1, characterized in that: The laminating mechanism comprises a cling film roller (28), the cling film roller (28) being rotatably mounted on the rear end of the mounting frame (2), a winding roller (29) being rotatably mounted on the front end of the mounting frame (2), and a sprocket group (30) being connected between the cling film roller (28) and the winding roller (29).

6. The cutting and sealing device of the tray cling film packaging machine according to claim 5, characterized in that: A bottom block (31) is fixedly mounted on the right end of the cross beam (3), a driving sprocket (32) meshing with the sprocket group (30) is rotatably mounted on the bottom block (31), a top block (33) located above the bottom block (31) is fixedly mounted on the right end of the cross beam (3), a one-way component is provided on the right end of the top block (33), a lifting telescopic rod (34) is fixedly mounted on the top end of the cross beam (3), a lap plate (35) is fixedly mounted on the top end of the lifting telescopic rod (34), a lifting shaft (36) is connected between the collar (4) and the lap plate (35), a guide bar (37) is fixedly mounted on the lifting shaft (36), a linkage rack (38) extending downward is fixedly mounted on the guide bar (37), and a linkage gear (39) meshing with the linkage rack (38) is mounted on the right end of the top block (33).

7. The cutting and sealing device of a tray cling film packaging machine according to claim 4, characterized in that: A push rack (40) is slidably mounted on the ends of the two lifting plates (22) that are away from each other, and a reset spring (41) is fixedly mounted on the lower end of each of the push racks (40). A driving gear (42) that meshes with the corresponding push rack (40) is rotatably mounted on the lower end of each of the lifting plates (22). Reset openings (43) are respectively provided on the ends of the two lifting plates (22) that are close to each other, and each of the separation plates (25) is arranged in the corresponding reset opening (43). A driven rack (44) that meshes with the corresponding driving gear (42) is fixedly mounted on each of the separation plates (25).

8. The cutting and sealing device of a tray cling film packaging machine according to claim 4, characterized in that: A stabilizing frame (45) is fixedly mounted on the clamping plate (14) located at the rear side, an extension block (46) is fixedly mounted on the rear end of the mounting frame (2), a sliding rod (47) that slides up and down is mounted on the extension block (46), a first rack (48) that extends backward is fixedly mounted on the lifting plate (22) located on the left side, a second rack (49) that extends backward is fixedly mounted on the lifting plate (22) located on the right side, a self-rotating gear (50) located between the first rack (48) and the second rack (49) is rotatably mounted on the sliding rod (47), and a synchronous motor (51) is fixedly mounted on the sliding rod (47).

9. The cutting and sealing device of a tray cling film packaging machine according to claim 6, characterized in that: The one-way assembly comprises a one-way ring (52), a limiting block (63) is fixedly mounted on the right end of the cross beam (3), the one-way ring (52) is rotatably mounted on the limiting block (63), an outer side of the one-way ring (52) is provided with an external tooth (53), a synchronous gear (54) meshing with the external tooth (53) is coaxially fixedly mounted on the drive sprocket (32), an inner side of the one-way ring (52) is provided with an internal tooth (55), a one-way disk (57) is rotatably mounted inside the one-way ring (52), a latching tooth (58) is rotatably mounted on the right end of the one-way disk (57), and a positioning shaft (59) and a pressure spring (60) are provided at the right end of the one-way disk (57).

10. The cutting and sealing device of a tray cling film packaging machine according to claim 4, characterized in that: Each lifting plate (22) is provided with a pushing telescopic rod (61), and left and right sides of the mounting frame (2) are respectively provided with protective plates (62).

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