A convenient fresh meat cold chain vacuum packaging device and method

Abstract

The present invention relates to the field of vacuum packaging technology, and discloses an easy-to-use fresh meat cold chain vacuum packaging device and method. The easy-to-use fresh meat cold chain vacuum packaging device comprises: a support platform as a basic support structure; a product placement cavity, which is arranged on the top of the support platform and is used to place fresh meat products. The heat shrink film driving device equipped with the present invention can not only achieve the automatic switching effect of the heat shrink film, but also successfully realize the automatic tightening and transfer operation of the last section of the heat shrink film with the help of a carefully designed end film pulling mechanism. Its operating process is to perform a series of precise actions such as clamping, cutting, and rotation transfer on the last section of the heat shrink film in sequence. Regardless of whether the last section of the heat shrink film is tightly and firmly connected to the winding drum, or in a relatively loose connection state, the task of transferring the last section of the heat shrink film can be successfully completed.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum packaging, and more particularly to an easy-to-use fresh meat cold chain vacuum packaging device and method. Background Art

[0002] As a modern food packaging technology, vacuum packaging mainly uses a special vacuum packaging machine to extract the air in the packaging bag, thereby creating a vacuum state, and ultimately achieving the purpose of extending the shelf life of food and maintaining the freshness of food. In practical applications, there are various packaging forms to choose from, such as common vacuum packaging in plastic bags, aluminum foil packaging, glassware packaging, and plastic. People choose appropriate packaging materials according to different types of items.

[0003] However, in the cold chain transportation process of fresh meat, the processed fresh meat must first be vacuum-packed by a vacuum packaging device before entering the cold chain transportation link. In the prior art, such as the cold fresh meat body-fitting vacuum packaging machine disclosed in the announcement number CN216235091U, although the problem of manually pulling the heat shrink film has been solved, there are still several defects. Specifically, when the heat shrink film roll is about to run out and only the last section is left, according to the heat shrink film pulling mechanism of the above-mentioned vacuum packaging machine, two situations will occur: first, if the connection between the last section of the heat shrink film and the reel is relatively tight and firm, then the film pulling mechanism will not be able to continue to pull the heat shrink film; second, if the connection between the last section of the heat shrink film and the reel is relatively loose, the film pulling mechanism will directly cause the last section of the heat shrink film to separate from the reel. For the first case, the conventional solution is for the staff to manually cut off the end of the last section, and then manually tighten the heat shrink film so that it can be used again; for the second case, manual assistance is also required to pull the last section of the heat shrink film so that it can be kept in a tensioned state for reuse. Obviously, both cases cannot be separated from manual assistance, which undoubtedly increases the workload of the staff. Therefore, it is urgent to provide a vacuum packaging device that can automatically tighten the heat shrink film before the heat shrink film is completely used up, and is also easy for manual operation and use. Summary of the invention

[0004] The purpose of the present invention is to provide an easy-to-use fresh meat cold chain vacuum packaging device and method to solve the above-mentioned technical problems.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0006] The present invention provides a fresh meat cold chain vacuum packaging device that is easy to use, comprising:

[0007] Support platform, serving as the basic support structure;

[0008] A product placement cavity, disposed on the top of the support platform, for placing fresh meat products;

[0009] A heat shrink treatment device, which is used to cover the heat shrink film on the surface of the meat product and perform heat shrink treatment on the covered heat shrink film;

[0010] A heat shrink film driving device, which is used to drive the heat shrink film linearly, and the heat shrink film driving device includes a winding mechanism, a driving mechanism and an end film pulling mechanism, and the winding mechanism is used to evenly spread the heat shrink film to ensure that a specific local position of the heat shrink film can be parallel to and directly above the product placement cavity;

[0011] Wherein, the winding mechanism includes a heat shrink film unwinding part and a heat shrink film winding part, and the driving end of the driving mechanism is respectively connected to the heat shrink film unwinding part and the heat shrink film winding part for transmission, and is used to provide power support for the operation of the winding mechanism; the terminal film pulling mechanism includes a clamping part and a rotating part, and the clamping part stretches the heat shrink film by contacting with one side of the heat shrink film, so that the heat shrink film remains in a tensioned state, and the rotating part is used to drive the clamping part to move toward one side of the product placement cavity, and the clamping part includes a movable swing arm, a first clamping plate, a second clamping plate, a support spring and a cutting knife, and the movable swing arm is rotatably sleeved on the outer side of the rotating end of the first transmission roller, one end of the first clamping plate is fixed to one side of the movable swing arm, and the top of the first clamping plate is in contact with the lower surface of the heat shrink film, and the second clamping plate is arranged parallel to the top of the first clamping plate, and one end of the second clamping plate is slidably connected to one side of the movable swing arm, and the support spring is fixedly installed between the first clamping plate and the second clamping plate, and the cutting knife is fixedly installed at the bottom of the second clamping plate.

[0012] Furthermore, the heat shrinkable film unwinding section and the heat shrinkable film winding section both include a fixed plate, a winding roller, a first transmission roller and a second transmission roller. The fixed plate is connected to the support platform through a movable support member, one end of the winding roller is connected to the driving mechanism, the first transmission roller and the second transmission roller are both rotatably installed on one side of the fixed plate, and the height of the first transmission roller is higher than the height of the winding roller, and the height of the second transmission roller is located between the first transmission roller and the winding roller, and the heat shrinkable film roll is installed on the outside of the winding roller, and the outside of the heat shrinkable film is in contact with the outside of the first transmission roller and the outside of the second transmission roller respectively.

[0013] Furthermore, the rotating part includes a limiting groove, a first gear, a second gear, a third gear, a rack, a telescopic driving member and a matching sliding shaft, one end of the matching sliding shaft is fixed to the sliding end of the second clamping plate, the limiting groove is arranged on a side of the fixed plate close to the clamping part, the limiting groove includes an extrusion section and an arc section, one end of the matching sliding shaft slides in cooperation with the extrusion section, the first gear is fixedly sleeved on the outside of the rotating section of the first transmission roller, and one side of the first gear is fixed to one side of the movable swing arm, the second gear is rotatably connected to one side of the fixed plate, and the second gear is meshed with the first gear, the third gear is located on the side of the fixed plate away from the second gear, the third gear is fixed to one side of the second gear, the rack is slidably installed on one side of the fixed plate, and one side of the rack is meshed with one side of the third gear, the bottom end of the rack is connected to the telescopic driving member, and the telescopic driving member is used to drive the rack to move up and down.

[0014] Furthermore, the driving mechanism includes a fixed frame, a driving motor, a driving pulley and two driven pulleys, the fixed frame is fixed to one side of the support platform, the driving motor is fixedly mounted on one side of the fixed frame, the driving pulley is fixedly mounted on the rotating end of the driving motor, the two driven pulleys are respectively fixedly mounted on the outside of the rotating ends of the two winding rollers, and the two driven pulleys are connected to the driving pulley through a transmission belt.

[0015] Furthermore, the heat shrink processing device includes a heat shrink hood and a telescopic component, the heat shrink hood is arranged directly above the product placement cavity, the telescopic component includes a telescopic driving source and a movable connecting piece, the fixed end of the telescopic driving source is fixed to one side of the main frame, the telescopic end of the telescopic driving source is fixed to the movable connecting piece, and the movable connecting piece is connected to the heat shrink hood. When the meat product is vacuum packed, the telescopic driving source contracts, so that the movable connecting piece can drive the heat shrink hood to move down and close the product placement cavity.

[0016] Furthermore, the movable connecting part includes a driving body and a fixed seat, the bottom of the driving body is fixedly connected to the telescopic end of the telescopic driving source, one end of the fixed seat is fixed to one side of the supporting platform, one side of the driving body is provided with a limiting slide groove, one side of the fixed seat slides in cooperation with the limiting slide groove through a limiting shaft, a connecting body is slidably installed on the inner side of the fixed seat, the top of the connecting body is fixedly connected to one side of the heat shrink cover, and a reset spring is fixedly installed between the bottom of the connecting body and the fixed seat.

[0017] Furthermore, the movable connecting member also includes a movable plate and a positioning frame body, the middle part of the movable plate is fixedly connected to one side of the driving body, and both ends of the movable plate are fixedly installed with a stabilizing rod, the top end of the stabilizing rod slides upward and passes through the top of the fixed plate, and the upper and lower ends of the outer side of the stabilizing rod are sleeved with connecting springs, and the two connecting springs are respectively fixed to the upper end surface and the lower end surface of the bottom of the fixed plate, the positioning frame body is fixedly connected to one side of the supporting platform, and both ends of the positioning frame body are slidably installed with a moving rod, the top end of the moving rod slides upward and passes through the top of the movable plate and is fixedly connected to the bottom of the fixed plate, and the lower end of the moving rod is sleeved with a compression spring, and the top end of the compression spring is fixed to the bottom of the positioning frame body.

[0018] Furthermore, the telescopic driving source is a hydraulic cylinder, and the lower end of the hydraulic cylinder is fixed to the lower end of the supporting platform through a mounting seat.

[0019] Furthermore, the telescopic driving member is a movable connecting member, the bottom of the rack is fixedly connected to the top of the movable plate, and the movable connecting member also includes two blocking plates, which are fixedly installed on the top of the fixed frame, and the two blocking plates are arranged in a one-to-one correspondence with the two fixed plates, and the bottoms of the two blocking plates are respectively fitted with the bottoms of the two fixed plates.

[0020] Another aspect of the present invention discloses a method for vacuum packaging of fresh meat, comprising the following steps:

[0021] S1. Place the packaging bottom plate in the product placement cavity, and then place the fresh meat product to be packaged on the top surface of the packaging bottom plate;

[0022] S2. The heat shrink film is driven to move to the top of the product placement cavity by the heat shrink film driving device, and the heat shrink processing device is used to press downward from the top of the heat shrink film so that the heat shrink film covers the outside of the fresh meat product, and the heat shrink film is subjected to heat pressing, vacuuming and cutting treatment in sequence so that the heat shrink film finally tightly covers the outside of the fresh meat product;

[0023] S3. After completing one vacuum packaging, the heat shrink film is driven by the heat shrink film driving device to move the new heat shrink film to the top of the product placement cavity, and the S1-S2 operations are repeated;

[0024] S4. When the last section of the heat shrink film is used, the end of the heat shrink film is first clamped by the end film pulling mechanism, and then the end of the heat shrink film connected to the roll core is cut off, and the heat shrink film is driven to move toward the side of the product placement cavity, and finally the last section of the heat shrink film is arranged in parallel above the product placement cavity in a tensioned state, and the S1-S2 operations are repeated, so that the last section of the heat shrink film covers the outside of the fresh meat product;

[0025] S5. After using the last section of the heat shrink film, the end film pulling mechanism is reset by movement, and a new heat shrink film roll is installed on the heat shrink film extension part to continue vacuum packaging.

[0026] The beneficial effects of the present invention are:

[0027] The heat shrink film driving device equipped in the present invention can not only achieve the automatic switching effect of the heat shrink film, but also successfully realize the automatic tightening and transfer operation of the last section of the heat shrink film with the help of the carefully designed end film pulling mechanism. Its operation process is to perform a series of precise actions such as clamping, cutting and rotation transfer on the last section of the heat shrink film in sequence. In this way, no matter whether the last section of the heat shrink film is tightly and firmly connected to the winding drum or in a relatively loose connection state, the task of transferring the last section of the heat shrink film can be successfully completed. When working in coordination with the heat shrink film winding part, the last section of the heat shrink film can be effectively pulled to a pre-set use position so that it can be put into use again. This innovative design completely replaces the existing manual auxiliary operation mode, greatly reduces the labor intensity of the staff, makes the entire vacuum packaging operation process more convenient and efficient, provides a more advantageous solution for industrial production, and strongly promotes the development and progress of vacuum packaging technology in practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a first embodiment of a fresh meat cold chain vacuum packaging device that is easy to use provided by the present invention;

[0029] Figure 2 It is a schematic diagram of the external structure of a fresh meat cold chain vacuum packaging device that is easy to use provided by the present invention;

[0030] Figure 3 It is a structural schematic diagram of a heat shrink film driving device in a fresh meat cold chain vacuum packaging device that is easy to use provided by the present invention;

[0031] Figure 4 It is a structural schematic diagram of the first perspective between the end film pulling mechanism and the heat shrink film lengthening component in a fresh meat cold chain vacuum packaging device that is easy to use provided by the present invention;

[0032] Figure 5 It is a structural schematic diagram of a second viewing angle between a terminal film pulling mechanism and a heat shrink film lengthening component in a fresh meat cold chain vacuum packaging device that is easy to use provided by the present invention;

[0033] Figure 6 It is a structural schematic diagram of a terminal film-drawing mechanism in a fresh meat cold chain vacuum packaging device that is easy to use provided by the present invention;

[0034] Figure 7It is a structural schematic diagram of a local position of a clamping part in a fresh meat cold chain vacuum packaging device that is easy to use provided by the present invention;

[0035] Figure 8 It is a structural schematic diagram of a driving mechanism in a fresh meat cold chain vacuum packaging device that is easy to use provided by the present invention;

[0036] Fig. 9 It is a structural schematic diagram of a heat shrinkage processing device in a fresh meat cold chain vacuum packaging device that is easy to use provided by the present invention;

[0037] Fig.10 It is a structural schematic diagram of a telescopic component in a fresh meat cold chain vacuum packaging device that is easy to use provided by the present invention;

[0038] Fig.11 It is a structural schematic diagram between a fixing seat and a driving body in a fresh meat cold chain vacuum packaging device that is easy to use provided by the present invention;

[0039] Fig.12 It is a structural schematic diagram of a second embodiment of a fresh meat cold chain vacuum packaging device that is easy to use provided by the present invention.

[0040] In the figure:

[0041] 1. Support platform;

[0042] 2. Heat shrinkage treatment device; 21. Heat shrinkage cover; 22. Telescopic assembly; 221. Telescopic driving source; 222. Driving body; 223. Fixed seat; 224. Limiting slide groove; 225. Limiting shaft; 226. Connecting body; 227. Return spring; 228. Movable plate; 229. Positioning frame; 2210. Stabilizing rod; 2211. Connecting spring; 2212. Moving rod; 2213. Compression spring; 2214. Blocking plate;

[0043] 3. Heat shrink film driving device;

[0044] 31. Winding mechanism; 311. Fixed plate; 312. Winding roller; 313. First transmission roller; 314. Second transmission roller;

[0045] 32. driving mechanism; 321. fixing frame; 322. driving motor; 323. driving pulley; 324. driven pulley; 325. transmission belt;

[0046] 33, end film pulling mechanism; 331, movable swing arm; 332, first clamping plate; 333, second clamping plate; 334, support spring; 335, cutting knife; 336, limit groove; 337, first gear; 338, second gear; 339, third gear; 3310, rack; 3311, telescopic driving member; 3312, matching sliding shaft;

[0047] 4. Product placement cavity; 5. Heat shrink film. DETAILED DESCRIPTION

[0048] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0049] Please refer to Figure 1 A fresh meat cold chain vacuum packaging device that is easy to use includes: a supporting platform 1, a heat shrinking processing device 2 and a heat shrinking film driving device 3. The top of the supporting platform 1 is provided with a product placement cavity 4 for fresh meat. The heat shrinking processing device 2 is used to cover the surface of the fresh meat with a heat shrinking film 5 and perform heat shrinking treatment on the covered heat shrinking film 5 to achieve the vacuum packaging function of the fresh meat.

[0050] Please refer to Figure 2 In order to realize the tensioning function of the last section of the heat shrinkable film 5, the present invention is provided with a heat shrinkable film driving device 3, and the specific scheme is as follows: the heat shrinkable film driving device 3 includes a winding mechanism 31, a driving mechanism 32 and an end film pulling mechanism 33, the winding mechanism 31 is used to spread the heat shrinkable film 5 so that the local position of the heat shrinkable film 5 is arranged in parallel directly above the product placement cavity 4, the winding mechanism 31 includes a heat shrinkable film unwinding part and a heat shrinkable film winding part, and the driving end of the driving mechanism 32 is respectively connected to the heat shrinkable film unwinding part and the heat shrinkable film winding part; the end film pulling mechanism 33 is connected to the heat shrinkable film unwinding part, and the end film pulling mechanism 33 includes a clamping part and a rotating part, the clamping part stretches one side of the heat shrinkable film 5 by contacting it, so that the heat shrinkable film 5 remains in a tensioned state, and the rotating part is connected to the clamping part.

[0051] For details, please refer to Figure 3The heat shrink film unwinding part and the heat shrink film winding part are symmetrically distributed on the left and right sides of the support platform 1. The heat shrink film unwinding part and the heat shrink film winding part both include a fixed plate 311, a winding roller 312, a first transmission roller 313 and a second transmission roller 314. The fixed plate 311 is connected to the support platform 1 through a movable support member. One end of the winding roller 312 is connected to the driving mechanism 32. The first transmission roller 313 and the second transmission roller 314 are both rotatably mounted on one side of the fixed plate 311. The height of the first transmission roller 313 is higher than the height of the winding roller 312. The height of the second transmission roller 314 is located at the first transmission roller 313. Between the winding roller 312, the heat shrink film 5 roll is installed on the outside of the winding roller 312, and the outside of the heat shrink film 5 is in contact with the outside of the first transmission roller 313 and the second transmission roller 314 respectively. The heat shrink film 5 starts from the winding roller 312 on the side of the heat shrink film unwinding part, first passes through the end film pulling mechanism 33 on the side of the heat shrink film unwinding part, and then is lifted and tightened by the first transmission roller 313, and then passes through the second transmission roller 314 to lower the height, and then passes through the second transmission roller 314 on the side of the heat shrink film winding part. Under the tensioning and squeezing action of the two second transmission rollers 314, the heat shrink film 5 can remain parallel to the product placement cavity 4.

[0052] Please refer to Figures 4 to 7The clamping part includes a movable swing arm 331, a first clamping plate 332, a second clamping plate 333, a support spring 334 and a cutting knife 335. The movable swing arm 331 is rotatably mounted on the outer side of the rotating end of the first transmission roller 313. One end of the first clamping plate 332 is fixed to one side of the movable swing arm 331. The top of the first clamping plate 332 is in contact with the lower surface of the heat shrink film 5. The second clamping plate 333 is arranged above the first clamping plate 332 in parallel. One end of the second clamping plate 333 is slidably connected to one side of the movable swing arm 331. The support spring 334 is fixedly mounted on the first clamping plate 3 32 and the second clamping plate 333, the cutting knife 335 is fixedly installed at the bottom of the second clamping plate 333, and an elastic pad is provided at the bottom of the second clamping plate 333. The elastic pad can be made of rubber material. On the one hand, it can increase the friction between the second clamping plate 333 and the heat shrinkable film 5, and on the other hand, it can make the bottom of the second clamping plate 333 contact with the upper surface of the heat shrinkable film 5 first, and then clamp it. When the cutting knife 335 continues to move down to cut off the heat shrinkable film 5, the elasticity of the elastic pad can be used to make the second clamping plate 333 have a certain displacement, thereby ensuring that the cutting knife 335 cuts off the heat shrinkable film 5. The rotating part includes a matching sliding shaft 3312, a limiting groove 336, a first gear 337, a second gear 338, a third gear 339, a rack 3310 and a telescopic driving member 3311. One end of the matching sliding shaft 3312 is fixed to the sliding end of the second clamping plate 333. The limiting groove 336 is arranged on the side of the fixed plate 311 close to the clamping part. The limiting groove 336 includes an extrusion section and an arc section. One end of the matching sliding shaft 3312 slides in cooperation with the extrusion section. The first gear 337 is fixedly sleeved on the outer side of the rotating section of the first transmission roller 313, and one side of the first gear 337 is fixed to one side of the movable swing arm 331. The second gear 338 is rotationally connected to one side of the fixed plate 311, and the second gear 338 is meshed with the first gear 337. The third gear 339 is located on the side of the fixed plate 311 away from the second gear 338. The third gear 339 is fixed to one side of the second gear 338. The rack 3310 is slidably installed on one side of the fixed plate 311, and one side of the rack 3310 is meshed with one side of the third gear 339. The bottom end of the rack 3310 is connected to the telescopic driving member 3311. The telescopic driving member 3311 is used to drive the rack 3310 to move up and down. The telescopic driving member 3311 can be a cylinder. The driving mechanism 32 includes a fixed frame 321, a driving motor 322, a driving pulley 323 and two driven pulleys 324. The fixed frame 321 is fixed to one side of the support platform 1, the driving motor 322 is fixedly installed on one side of the fixed frame 321, the driving pulley 323 is fixedly installed on the rotating end of the driving motor 322, and the two driven pulleys 324 are respectively fixedly installed on the outer sides of the rotating ends of the two winding rollers 312, and the two driven pulleys 324 are connected to the driving pulley 323 through a transmission belt 325.

[0053] It should be noted that the use process of the heat shrink film driving device 3 is as follows:

[0054] After the fresh meat is vacuum packed, the heat shrink film 5 located above the product placement chamber 4 has been used and needs to be replaced with a new heat shrink film 5. By driving the motor 322 to rotate, the active pulley 323 can drive the two driven pulleys 324 to rotate synchronously. At this time, the winding roller 312 on the heat shrink film unwinding part rotates along with the driven pulley 324 connected thereto, so that the heat shrink film 5 on it gradually unwinds the heat shrink film 5, and the winding roller 312 on the heat shrink film winding part also rotates along with the driven pulley 324 connected thereto, so that the used heat shrink film 5 is wound up, and the two Under the synchronous rotation of the winding roller 312, the heat shrink film 5 is always in a tensioned state, and the unused heat shrink film 5 is driven to the top of the product placement cavity 4; then, the fresh meat is placed in the product placement cavity 4, and the heat shrink treatment device 2 is moved to first press the horizontal heat shrink film 5 directly below it to the top of the product placement cavity 4 to fit, and then the heat shrink film 5 can cover the surface of the fresh meat, and the heat shrink treatment device 2 further heat shrinks the heat shrink film 5 so that the heat shrink film 5 can fit tightly to the surface of the fresh meat, completing a vacuum packaging operation, and repeating the operation;

[0055] When only the last section of the heat shrink film 5 is left, the telescopic driving member 3311 is extended to drive the rack 3310 to move upward, and the upward movement of the rack 3310 can drive the third gear 339 to rotate, and then the second gear 338 drives the first gear 337 to rotate together, and the movable swing arm 331 swings upward with the first gear 337. At this time, the matching slide shaft 3312 starts to slide in the extrusion section of the limiting groove 336, and the extrusion section generates an extrusion force on the matching slide shaft 3312, so that the matching slide shaft 3312 is moved in the movable swing arm 331. The second clamping plate 333 and the cutting knife 335 move downward together with the matching sliding shaft 3312, and gradually approach the first clamping plate 332. When the matching sliding shaft 3312 slides from the extrusion section to the arc section, the bottom of the second clamping plate 333 moves downward to fit the upper surface of the heat shrinkable film 5, so that the heat shrinkable film 5 is clamped between the second clamping plate 333 and the first clamping plate 332. The cutting knife 335 cuts off the end of the heat shrinkable film 5 after the heat shrinkable film 5 is clamped, so that the end connected to the winding roller 312 is separated.

[0056] Then, the telescopic driving member 3311 continues to extend, which can drive the movable swing arm 331 to continue to flip upward. At this time, the matching sliding shaft 3312 slides to the arc section of the limiting groove 336. Under the limiting effect of the arc section, the matching sliding shaft 3312 is still in a squeezed state, and the second clamping plate 333 still clamps the heat shrinkable film 5. During the flipping of the movable swing arm 331, the heat shrinkable film 5 moves with the clamping part, so that its end gradually moves closer to the second transmission roller 314. At the same time, the winding roller 312 on one side of the heat shrinkable film winding part is driven to rotate by the driving motor 322. The heat shrink film 5 can be pulled to one side to adapt to the flipping action of the movable swing arm 331, so that the heat shrink film 5 is always in a tensioned state. When the clamping part moves close to the position of the second transmission roller 314, the telescopic driving member 3311 stops extending, and the driving motor 322 also stops rotating. At this time, the last section of the heat shrink film 5 is in a tensioned state and is just above the product placement cavity 4. After using the last section of the heat shrink film 5, the telescopic driving member 3311 contracts to drive the clamping part to move and reset, and then a new roll of heat shrink film 5 is installed on the heat shrink film unwinding part, and vacuum packaging can continue.

[0057] Therefore, it can be known that the heat shrink film driving device 3 provided in the present invention, in addition to being able to realize the automatic switching function of the heat shrink film 5, realizes the automatic tensioning and transfer function of the last section of the heat shrink film 5 by providing an end film pulling mechanism 33. The last section of the heat shrink film 5 is clamped, cut and rotated and transferred in sequence. Regardless of whether the last section of the heat shrink film 5 is firmly or loosely connected to the winding drum, the transfer of the last section of the heat shrink film 5 can be easily achieved. When used in conjunction with the heat shrink film winding portion, the last section of the heat shrink film 5 is driven to a preset use position and continued to be used once, replacing the existing manual auxiliary operation, reducing the workload of the staff, and making the vacuum packaging operation more convenient. In addition, the end film pulling mechanism 33, in a normal state, provides support for the heat shrink film 5 by contacting the lower surface of the heat shrink film 5, so that the heat shrink film 5 remains in a tensioned state. Therefore, the end film pulling mechanism 33 provided in the present invention has two use states. In the first state, the heat shrink film 5 can be kept tensioned, and when switched to the second state, it is used to transfer the last section of the heat shrink film 5.

[0058] Please refer to Figures 9 to 11In order to realize the automatic vacuum packaging operation of fresh meat, the present invention designs a heat shrink processing device 2, and the specific scheme is as follows: the heat shrink processing device 2 includes a heat shrink cover 21 and a telescopic assembly 22, the heat shrink cover 21 is arranged just above the product placement cavity 4, a cutting knife is fixedly installed at the bottom of the heat shrink cover 21, and the telescopic assembly 22 includes a telescopic driving source 221 and a movable connecting piece, the fixed end of the telescopic driving source 221 is fixed to one side of the main frame, and the telescopic end of the telescopic driving source 221 is fixed to the movable connecting piece, and the telescopic driving source 221 can be a hydraulic cylinder, and the lower end of the hydraulic cylinder is fixed to the lower end of the support platform 1 through a mounting seat. The movable connecting piece is connected to the heat shrink cover 21, and when the fresh meat is vacuum packaged, the telescopic driving source 221 is contracted, so that the movable connecting piece can drive the heat shrink cover 21 to move down and close with the product placement cavity 4. The movable connecting part includes a driving body 222, a fixed seat 223, a movable plate 228 and a positioning frame 229. The bottom of the driving body 222 is fixedly connected to the telescopic end of the telescopic driving source 221, one end of the fixed seat 223 is fixed to one side of the supporting platform 1, one side of the driving body 222 is provided with two symmetrically distributed limiting grooves 224, one side of the fixed seat 223 slides with the two limiting grooves 224 through two limiting shafts 225 respectively, a connecting body 226 is slidably installed on the inner side of the fixed seat 223, the top of the connecting body 226 is fixedly connected to one side of the heat shrink cover 21, and a reset spring 227 is fixedly installed between the bottom of the connecting body 226 and the fixed seat 223. The middle part of the movable plate 228 is fixedly connected to one side of the driving body 222, and two stabilizing rods 2210 are fixedly installed at both ends of the movable plate 228. The top ends of the two stabilizing rods 2210 slide upward and pass through the top of the fixed plate 311. The upper and lower ends of the outer sides of the two stabilizing rods 2210 are sleeved with connecting springs 2211, and the ends of the two connecting springs 2211 are respectively fixed to the upper end surface and the lower end surface of the bottom of the fixed plate 311. The positioning frame 229 is fixedly connected to one side of the supporting platform 1, and the two ends of the positioning frame 229 are slidably installed with moving rods 2212. After the top end of the moving rod 2212 slides upward and passes through the top of the movable plate 228, it is fixedly connected to the bottom of the fixed plate 311. The lower end of the moving rod 2212 is sleeved with a compression spring 2213. The top end of the compression spring 2213 is fixed to the bottom of the positioning frame 229, and the elastic coefficient of the compression spring 2213 is less than the elastic coefficient of the connecting spring 2211.

[0059] It should be noted that the use process of the above-mentioned heat shrinkage treatment device 2 is as follows:

[0060] First, the fresh meat to be packaged is placed in the product placement cavity 4. Then, the heat shrink film driving device 3 starts to operate, and its function is to convey the unused heat shrink film 5 to the position just above the product placement cavity 4 to prepare for the subsequent packaging operation. Then, the telescopic driving source 221 starts the contraction process. During this process, the driving body 222 will move downward with the contraction of the telescopic driving source 221, and the movable plate 228 connected thereto will also synchronously follow the driving body 222 to produce a downward displacement. Since the movable plate 228 and the two fixed plates 311 are connected to each other through the stabilizing rod 2210, when the movable plate 228 moves downward, the two fixed plates 311 also begin to move downward with the driving body 222 under the pull of the stabilizing rod 2210. At the same time, the moving rod 2212 slides downward on the positioning frame 229, which causes the compression spring 2213 to be stretched and lengthened. When the lower surface of the heat shrink film 5 drops to contact the top of the product placement chamber 4, the bottoms of the two second transmission rollers 314 just fit the top of the support platform 1, and the top of the driving body 222 just drops to the position of contacting the top of the connecting body 226. As the telescopic driving source 221 continues to shrink, the heat shrink film extension part and the heat shrink film winding part cannot continue to move downward because the second transmission roller 314 is blocked by the top of the support platform 1, and the driving body 222 will exert downward pressure on the connecting body 226, causing the connecting body 226 to slide downward on the fixing seat 223. During this process, the reset spring 227 will be squeezed and shrunk. At the same time, the heat shrink cover 21 will move downward synchronously with the downward movement of the connecting body 226. In this process, the movable plate 228 continues to move downward with the driving body 222, and the stabilizing rod 2210 will also move downward, thereby squeezing the connecting spring 2211 at the upper end of the stabilizing rod 2210. This design enables the movable plate 228 to avoid the obstruction of the fixed plate 311 and smoothly follow the driving body 222 to complete the downward movement, while the heat shrink film extension part and the heat shrink film winding part remain stationary. When the bottom of the heat shrink film 5 drops to completely close with the top opening of the product placement chamber 4, the telescopic driving source 221 stops the contraction action. At this time, the cutting knife just cuts off the heat shrink film 5 below, so that the heat shrink film 5 forms a shape that matches the product placement chamber 4. Then, the heat shrink cover 21 turns on the heating function. Under the heating effect of the heat shrink cover 21, the cut heat shrink film 5 can tightly cover the surface of the fresh meat, thus completing the heat shrinking link in the packaging process. When the packaging operation is completed, the telescopic driving source 221 begins to extend. Initially, under the elastic force of the return spring 227, the heat shrink cover 21 will first move upward to return to its original position.After the heat shrink cover 21 is reset, as the telescopic driving source 221 continues to extend, it can drive the heat shrink film unwinding part and the heat shrink film winding part to move upward and reset together, thus completing a complete packaging operation cycle.

[0061] In summary, the heat shrink processing device 2 equipped in the present invention not only has the ability to automatically vacuum-pack fresh meat, but also its uniquely designed telescopic component 22 can drive the heat shrink film extension part and the heat shrink film winding part and the heat shrink cover 21 to move downward in stages. This design enables the heat shrink processing device 2 to automatically realize the covering process of the heat shrink film 5 and the heat shrinking process of the heat shrink film 5, and these two processes can be carried out automatically and orderly without setting up multiple independent driving sources to drive them separately, and without complex control programs to control each link separately, which effectively reduces the use cost and operation complexity of the vacuum packaging device and improves the practicality and economy of the equipment.

[0062] Embodiment 2

[0063] Please refer to Fig.12 The present invention also provides another embodiment of a fresh meat cold chain vacuum packaging device and method that is easy to use. The difference between the second embodiment and the first embodiment is that the rotating part includes a matching sliding shaft 3312, a limiting groove 336, a first gear 337, a second gear 338, a third gear 339 and a rack 3310. One end of the matching sliding shaft 3312 is fixed to the sliding end of the second clamping plate 333. The limiting groove 336 is arranged on a side of the fixed plate 311 close to the clamping part. The limiting groove 336 includes an extrusion section and an arc section. One end of the matching sliding shaft 3312 slides in cooperation with the extrusion section. The first gear 337 is fixedly sleeved on the outer side of the rotating section of the first transmission roller 313, and the third gear 339 is fixedly sleeved on the outer side of the rotating section of the first transmission roller 313. One side of a gear 337 is fixed to one side of the movable swing arm 331, the second gear 338 is rotatably connected to one side of the fixed plate 311, and the second gear 338 is meshed with the first gear 337, the third gear 339 is located on the side of the fixed plate 311 away from the second gear 338, the third gear 339 is fixed to one side of the second gear 338, the rack 3310 is slidably mounted on one side of the fixed plate 311, and one side of the rack 3310 is meshed with one side of the third gear 339, the bottom end of the rack 3310 is connected to a telescopic driving member 3311, the telescopic driving member 3311 is a movable connecting member, and the bottom of the rack 3310 is fixedly connected to the top of the movable plate 228. The movable connecting member also includes two blocking plates 2214, the two blocking plates 2214 are arranged one-to-one with the two fixed plates 311, and the bottoms of the two blocking plates 2214 are respectively fitted with the bottoms of the two fixed plates 311.

[0064] It should be clear that when the last section of the heat shrink film 5 is about to be used, the telescopic drive source 221 performs an upward extension action. In this process, since the bottoms of the two fixed plates 311 are each blocked by the two blocking plates 2214, the fixed plates 311 cannot move upward together with the telescopic drive source 221. At the same time, the movable plate 228 will drive the stabilizing bar 2210 to move upward together, which will cause the connecting spring 2211 at the lower end of the stabilizing bar 2210 to be compressed, while the spring at the upper end of the stabilizing bar 2210 will be stretched. In this case, the rack 3310 will move upward synchronously with the upward movement of the movable plate 228, and the upward movement of the rack 3310 will drive the third gear 339 meshing therewith to rotate, and through a series of transmission structures, the clamping portion will eventually successfully complete the cutting and transfer actions of the heat shrink film 5.

[0065] In the design of this embodiment, an active connector is innovatively used to replace the cylinder used in the first embodiment. Through this substitution method, the efficient coordinated transmission between the telescopic component 22 and the terminal film-pulling mechanism 33 is successfully achieved. This improvement measure not only eliminates the use of the cylinder, thereby effectively reducing the use cost of the vacuum packaging device, but also further expands the function of the telescopic component 22. It is no longer limited to driving the heat shrink film driving device 3 and the heat shrink cover 21 to move, but can also be used to drive the terminal film-pulling mechanism 33 to move. More importantly, this design method no longer needs to specially set up a complex control program to automatically control the action of the terminal film-pulling mechanism 33, which greatly simplifies the control system of the equipment, improves the stability and reliability of the equipment, and also reduces the operation difficulty and maintenance cost of the equipment, bringing many conveniences to actual production and use.

[0066] Embodiment 3

[0067] On the other hand, the present invention also provides a method for vacuum packaging of fresh meat, which is applicable to the above-mentioned convenient-to-use cold chain vacuum packaging equipment for fresh meat, and comprises the following operating steps:

[0068] S1. Place the packaging bottom plate in the product placement cavity 4, and then place the fresh meat product to be packaged on the top surface of the packaging bottom plate;

[0069] S2, the heat shrink film 5 is driven to move to the top of the product placement cavity 4 by the heat shrink film driving device 3, and the heat shrink processing device 2 is used to press downward from the top of the heat shrink film 5 so that the heat shrink film 5 covers the outside of the fresh meat product, and the heat shrink film 5 is subjected to heat pressing, vacuuming and cutting treatment in sequence, so that the heat shrink film 5 finally tightly covers the outside of the fresh meat product;

[0070] S3, after completing one vacuum packaging, the heat shrink film 5 is driven to move by the heat shrink film driving device 3, so that the new heat shrink film 5 moves to the top of the product placement cavity 4, and the S1-S2 operations are repeated;

[0071] S4, when the last section of the heat shrink film 5 is used, the end of the heat shrink film 5 is first clamped by the end film pulling mechanism 33, and then the end of the heat shrink film 5 connected to the winding core is cut off, and the heat shrink film 5 is driven to move closer to the product placement cavity 4, and finally the last section of the heat shrink film 5 is arranged in parallel above the product placement cavity 4 in a tensioned state, and the S1-S2 operations are repeated, so that the last section of the heat shrink film 5 covers the outside of the fresh meat product;

[0072] S5, after the last section of the heat shrink film 5 is used, the end film pulling mechanism 33 is moved back to its original position, a new heat shrink film 5 is rolled and installed on the heat shrink film unwinding portion, and vacuum packaging is continued.

[0073] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. A fresh meat cold chain vacuum packaging device that is easy to use, characterized in that: include: A support platform (1) serving as a basic support structure; A product placement cavity (4), arranged on the top of the support platform (1), and used for placing fresh meat products; A heat shrink treatment device (2) is used to cover the heat shrink film (5) on the surface of the meat product and perform heat shrink treatment on the covered heat shrink film (5); A heat shrink film driving device (3) for driving the heat shrink film to drive linearly, the heat shrink film driving device (3) comprising a winding mechanism (31), a driving mechanism (32) and an end film pulling mechanism (33), the winding mechanism (31) being used to evenly spread the heat shrink film (5) to ensure that a specific local position of the heat shrink film (5) can be parallel and directly above the product placement cavity (4); The winding mechanism (31) comprises a heat shrink film unwinding portion and a heat shrink film winding portion, and the driving end of the driving mechanism (32) is respectively connected to the heat shrink film unwinding portion and the heat shrink film winding portion in a transmission manner, and is used to provide power support for the operation of the winding mechanism (31); the terminal film pulling mechanism (33) comprises a clamping portion and a rotating portion, and the clamping portion stretches the heat shrink film (5) by contacting with one side of the heat shrink film (5) so that the heat shrink film (5) is kept in a tensioned state, and the rotating portion is used to drive the clamping portion to move closer to one side of the product placement cavity (4), and the clamping portion comprises a movable swing arm (331), a first clamping plate (332), and a second clamping plate (333). 3), a support spring (334) and a cutting knife (335), one end of the first clamping plate (332) is fixed to one side of the movable swing arm (331), the top of the first clamping plate (332) is in contact with the lower surface of the heat shrink film (5), the second clamping plate (333) is arranged parallel to the top of the first clamping plate (332), and one end of the second clamping plate (333) is slidably connected to one side of the movable swing arm (331), the support spring (334) is fixedly installed between the first clamping plate (332) and the second clamping plate (333), and the cutting knife (335) is fixedly installed at the bottom of the second clamping plate (333); The heat shrink film unwinding section and the heat shrink film winding section both comprise a fixed plate (311), a winding roller (312), a first transmission roller (313) and a second transmission roller (314); the fixed plate (311) is connected to the support platform (1) via a movable support member; one end of the winding roller (312) is connected to the driving mechanism (32); the first transmission roller (313) and the second transmission roller (314) are both rotatably mounted on one side of the fixed plate (311); the height of the first transmission roller (313) is higher than the height of the winding roller (312); the height of the second transmission roller (314) is located between the first transmission roller (313) and the winding roller (312); the heat shrink film reel is mounted on the outside of the winding roller (312); and the outside of the heat shrink film (5) is in contact with the outside of the first transmission roller (313) and the outside of the second transmission roller (314); The rotating part comprises a limiting groove (336), a first gear (337), a second gear (338), a third gear (339), a rack (3310), a telescopic driving member (3311) and a matching sliding shaft (3312); one end of the matching sliding shaft (3312) is fixed to the sliding end of the second clamping plate (333); the limiting groove (336) is arranged on a side of the fixed plate (311) close to the clamping part; the limiting groove (336) comprises an extrusion section and an arc section; one end of the matching sliding shaft (3312) slides in cooperation with the extrusion section; the first gear (337) is fixedly sleeved on the outer side of the rotating section of the first transmission roller (313); and one side of the first gear (337) is in contact with the movable swing arm (33 1), the second gear (338) is rotatably connected to one side of the fixing plate (311), and the second gear (338) is meshed with the first gear (337), the third gear (339) is located on a side of the fixing plate (311) away from the second gear (338), the third gear (339) is fixed to one side of the second gear (338), the rack (3310) is slidably mounted on one side of the fixing plate (311), and one side of the rack (3310) is meshed with one side of the third gear (339), the bottom end of the rack (3310) is connected to a telescopic driving member (3311), and the telescopic driving member (3311) is used to drive the rack (3310) to move up and down.

2. The easy-to-use fresh meat cold chain vacuum packaging equipment according to claim 1 is characterized in that: The driving mechanism (32) comprises a fixed frame (321), a driving motor (322), a driving pulley (323) and two driven pulleys (324); the fixed frame (321) is fixed to one side of the support platform (1); the driving motor (322) is fixedly mounted on one side of the fixed frame (321); the driving pulley (323) is fixedly mounted on the rotating end of the driving motor (322); the two driven pulleys (324) are respectively fixedly mounted on the outside of the rotating ends of the two winding rollers (312); and the two driven pulleys (324) are connected to the driving pulley (323) via a transmission belt (325).

3. The easy-to-use fresh meat cold chain vacuum packaging equipment according to claim 2 is characterized in that: The heat shrink processing device (2) comprises a heat shrink hood (21) and a telescopic assembly (22); the heat shrink hood (21) is arranged directly above the product placement cavity (4); the telescopic assembly (22) comprises a telescopic drive source (221) and a movable connecting piece; the fixed end of the telescopic drive source (221) is fixed to one side of the main frame; the telescopic end of the telescopic drive source (221) is fixed to the movable connecting piece; the movable connecting piece is connected to the heat shrink hood (21); when the meat product is vacuum packaged, the telescopic drive source (221) contracts, so that the movable connecting piece can drive the heat shrink hood (21) to move downward and close with the product placement cavity (4).

4. The easy-to-use fresh meat cold chain vacuum packaging equipment according to claim 3 is characterized in that: The movable connecting member comprises a driving body (222) and a fixing seat (223); the bottom of the driving body (222) is fixedly connected to the telescopic end of the telescopic driving source (221); one end of the fixing seat (223) is fixed to one side of the supporting platform (1); one side of the driving body (222) is provided with a limiting slide groove (224); one side of the fixing seat (223) slides in cooperation with the limiting slide groove (224) via a limiting shaft (225); a connecting body (226) is slidably mounted on the inner side of the fixing seat (223); the top of the connecting body (226) is fixedly connected to one side of the heat shrink cover (21); and a return spring (227) is fixedly mounted between the bottom of the connecting body (226) and the fixing seat (223).

5. The easy-to-use fresh meat cold chain vacuum packaging equipment according to claim 4 is characterized in that: The movable connecting member further comprises a movable plate (228) and a positioning frame (229); the middle portion of the movable plate (228) is fixedly connected to one side of the driving body (222); both ends of the movable plate (228) are fixedly mounted with stabilizing rods (2210); the top end of the stabilizing rod (2210) slides upward and passes through the top of the fixed plate (311); the upper and lower ends of the outer side of the stabilizing rod (2210) are sleeved with connecting springs (2211); the two connecting springs (2211) are respectively connected to the bottom of the fixed plate (311) and the bottom of the fixed plate (311). The upper end surface and the lower end surface of the part are fixed, the positioning frame (229) is fixedly connected to one side of the support platform (1), and moving rods (2212) are slidably installed at both ends of the positioning frame (229). The top end of the moving rod (2212) slides upward and passes through the top of the movable plate (228) and is fixedly connected to the bottom of the fixed plate (311). The lower end of the moving rod (2212) is sleeved with a compression spring (2213), and the top end of the compression spring (2213) is fixed to the bottom of the positioning frame (229).

6. The easy-to-use fresh meat cold chain vacuum packaging equipment according to claim 5 is characterized in that: The telescopic driving source (221) is a hydraulic cylinder, and the lower end of the hydraulic cylinder is fixed to the lower end of the supporting platform (1) via a mounting seat.

7. The easy-to-use fresh meat cold chain vacuum packaging equipment according to claim 6 is characterized in that: The telescopic driving member (3311) is a movable connecting member, the bottom of the rack (3310) is fixedly connected to the top of the movable plate (228), and the movable connecting member also includes two blocking plates (2214). The two blocking plates (2214) are fixedly installed on the top of the fixed frame (321), and the two blocking plates (2214) are arranged in a one-to-one correspondence with the two fixed plates (311), and the bottoms of the two blocking plates (2214) are respectively in contact with the bottoms of the two fixed plates (311).

8. A method for vacuum packaging of fresh meat, applicable to the easy-to-use cold chain vacuum packaging equipment for fresh meat as described in any one of claims 1 to 7, characterized in that: The steps include: S1. placing a packaging bottom plate in the product placement cavity (4), and then placing the fresh meat product to be packaged on the top surface of the packaging bottom plate; S2, using the heat shrink film driving device (3) to move the heat shrink film (5) to the top of the product placement cavity (4), using the heat shrink processing device (2) to press downward from the top of the heat shrink film (5) so that the heat shrink film (5) covers the outside of the fresh meat product, and sequentially performing heat pressing, vacuuming and cutting processes on the heat shrink film (5) so that the heat shrink film (5) finally tightly covers the outside of the fresh meat product; S3, after completing one vacuum packaging, the heat shrink film (5) is driven to move by the heat shrink film driving device (3), so that the new heat shrink film (5) moves to the top of the product placement cavity (4), and the S1-S2 operations are repeated; S4, when the last section of the heat shrink film (5) is used, the end of the heat shrink film (5) is first clamped by the end film pulling mechanism (33), and then the end of the heat shrink film (5) connected to the winding core is cut off, and the heat shrink film (5) is driven to move toward the side of the product placement cavity (4), and finally the last section of the heat shrink film (5) is arranged in parallel in a tensioned state just above the product placement cavity (4), and the S1-S2 operations are repeated, so that the last section of the heat shrink film (5) covers the outside of the fresh meat product; S5. After the last section of the heat shrink film (5) is used, the end film pulling mechanism (33) is relocated and a new heat shrink film (5) roll is installed on the heat shrink film extension part to continue vacuum packaging.

Images