Cooked product vacuum freshness-locking packaging device and method

Abstract

The invention relates to the technical field of material packaging, in particular to a vacuum freshness-locking packaging device and method for cooked products. Comprising a conveying frame used for conveying packaging bags, a conveying belt is arranged on the conveying frame, and a containing mechanism and an adjusting mechanism are installed on the conveying frame. Unexpected adhesion, caused by the electrostatic adsorption effect, of the inner wall of the packaging bag body can be effectively broken through the separated movement; after the mature product filling procedure is completed, the limiting plate can limit the packaging bags to prevent the bottom accumulation phenomenon caused by instantaneous sedimentation of high-density mature products, and meanwhile the defect that the surfaces of packaging bag bodies are wrinkled due to uneven distribution of the mature products in the vacuum packaging stage is overcome.

Description

Technical Field

[0001] This application relates to the technical field of material packaging, and particularly to a vacuum fresh-keeping packaging device and method for cooked products. Background Art

[0002] Whether in a household or commercial environment, keeping food fresh is an important issue. Traditional methods such as refrigeration and freezing can delay food spoilage, but for some foods that need to be transported over long distances or high-end foods that are expected to be stored for a long time, these methods are not always sufficient. Especially for some cooked products that are relatively fragile or difficult to maintain quality for a long time.

[0003] The existing patent application with the publication number CN111907746B discloses an efficient double-bag horizontal vacuum packaging machine, which adopts a double-row matrix structure: two horizontally arranged vacuum sealing chambers each contain multiple longitudinal units, and through a three-stage transmission system of a longitudinal transition mechanism → a horizontal transfer mechanism → a longitudinal distribution mechanism, the interval distribution of packaging bags between the horizontal double rows and the sequential filling within the same longitudinal row are realized. This dual-channel alternating operation mode doubles the processing efficiency of the vacuum sealing process, and the supporting discharging and conveying mechanism completes automatic material collection, and the overall constitutes a continuous and efficient horizontal packaging production line.

[0004] Although the above existing vacuum packaging technology can double the vacuum sealing efficiency, there are still the following problems: The above patent application does not level the items to be packaged inside the packaging bag, resulting in non-uniform deformation of the contents under the air pressure extrusion when the packaging bag is evacuated. This deformation is transmitted to the surface of the packaging bag to form irregular wrinkles and concave-convex textures. On the one hand, it causes the geometric shape of the packaging bag to be unstable, forming a disordered stacking interface in a standardized warehousing scenario; on the other hand, the uneven surface of the item makes the item prone to friction during transportation, resulting in wear and even air leakage on the surface of the packaging bag, affecting the quality of the item.

[0005] Based on this, there is still room for improvement in the above existing vacuum packaging technology. Summary of the Invention

[0006] In order to solve the above technical problems, this application provides a vacuum fresh-keeping packaging device and method for cooked products, and adopts the following technical solutions: In a first aspect, a vacuum fresh-keeping packaging device for cooked products includes a conveying frame for conveying packaging bags, a conveyor belt is arranged on the conveying frame, and a placing mechanism and an adjusting mechanism are installed on the conveying frame.

[0007] The placing mechanism includes: Placing blocks, multiple of which are provided and evenly distributed along the length direction of the conveyor belt.

[0008] There are multiple groups of supporting rods corresponding to the placement blocks one by one. Each group of supporting rods is symmetrically installed on the placement blocks along the length direction of the conveyor belt and is synchronously opened and closed along the length direction of the conveyor belt.

[0009] The limiting plate is arranged at the bottom of the supporting rod and is used for limiting the position of the packaging bag.

[0010] The regulatory agencies include: The lifting frame is arranged above the conveyor belt and moves up and down along the height direction of the conveyor frame.

[0011] Two groups of toggle racks are symmetrically arranged along the width direction of the lifting frame, and each group of toggle racks is evenly arranged with multiple toggle racks along the length direction of the lifting frame, and move synchronously along the width direction of the lifting frame.

[0012] The toggle rod is arranged between the two groups of toggle frames and is provided in plurality along the length direction of the lifting frame, and reciprocates along the length direction of the lifting frame.

[0013] Preferably, the conveying frame includes two vertical frames, conveying rollers are installed on the two vertical frames through bearings, and the conveyor belt is installed between the two conveying rollers, a horizontal frame is installed between the two vertical frames, a vertical frame is installed on the horizontal frame, an electric slider is installed on the vertical frame, and the lifting frame is installed on the electric slider.

[0014] Preferably, a sliding plate corresponding to each set of toggle frames is provided at the bottom of the lifting frame, and the toggle frames are installed at the bottom of the corresponding sliding plates, a toggle protrusion is provided at the bottom of the toggle frames, connecting blocks are symmetrically installed on the supporting rod along its length direction, a snap-in groove is opened on the connecting block, and a telescopic connecting rod corresponding to the snap-in groove is installed on the sliding plate.

[0015] Preferably, the limit plate is slidably installed at the bottom of the supporting rod and automatically resets, a lifting frame is slidably installed on the vertical frame, a driving cylinder is installed on the lifting frame through a lifting cylinder, an adjusting frame is installed at the telescopic end of the driving cylinder, and an adjusting plate for adjusting the spacing between the limit plates is symmetrically installed on the side of the adjusting frame away from the driving cylinder along the width direction of the lifting frame.

[0016] Preferably, a bidirectional cylinder is installed on the adjustment frame through a cylinder seat, a clamp is installed at the telescopic end of the bidirectional cylinder, a rectangular groove is opened on the opposite surface of the clamp, and a rotating roller matching the limit plate is installed inside the rectangular groove through a bearing.

[0017] Preferably, a reciprocating rod is installed on the top of the toggle rod, an automatically reset linkage rod is slidably arranged on the vertical frame, and the linkage rod is connected to the reciprocating rod, a through groove is provided at one end of the linkage rod away from the reciprocating rod, a vertical connecting rod is installed on the lifting frame, and the vertical connecting rod passes through the through groove, and a plurality of adjustment protrusions are evenly arranged on the vertical connecting rod along its length direction.

[0018] Preferably, a stretching block corresponding to the supporting rod and automatically reset is slidably provided at one end of the placement block close to the limit plate, a rotating shaft is installed at one end of the supporting rod close to the corresponding stretching block, and the rotating shaft is installed on the corresponding stretching block through a bearing.

[0019] Preferably, a tensioning frame is slidably arranged inside the placement block along its height direction, and an automatically reset linkage cylinder is slidably arranged on the top of the placement block along its height direction. The linkage cylinder is connected to the corresponding tensioning frame, and a pressure rod matching the linkage cylinder is installed on the lifting frame.

[0020] Preferably, support frames are installed on both vertical frames, and a limiting rod for limiting the position of the supporting rod is installed between the two support frames.

[0021] In a second aspect, a vacuum fresh-keeping packaging method for cooked products is provided, and the use method thereof comprises the following steps: S1: Placement preparation: Place the packaging bag between the supporting rods corresponding to the placement block at the start of transportation, and make the bag mouth of the packaging bag clamped on the connecting block.

[0022] S2: Conveying and opening the bag, moving the placement block with the bag to the bottom of the lifting rack, and opening the bag by moving the rack.

[0023] S3: bagging, putting the cooked product to be packaged into the packaging bag through the bag opening, and homogenizing the cooked product inside the packaging bag.

[0024] S4: Vacuum treatment: vacuum the packaging bag containing the cooked product, and finally perform heat sealing.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the packaging bag processing process of the present invention, the supporting rod group drives the supporting rod through relative displacement movement to realize the precise opening of the packaging bag mouth. When the toggle frame performs radial expansion, its separate movement can effectively break the unexpected adhesion of the inner wall of the packaging bag body caused by the electrostatic adsorption effect; when the cooked product filling process is completed, the limiting plate can limit the packaging bag to prevent the bottom accumulation phenomenon caused by the instantaneous sedimentation of high-density cooked products, and at the same time avoid the wrinkle defects on the surface of the packaging bag caused by the uneven distribution of cooked products in the vacuum packaging stage.

[0026] 2. The splint of the present invention can oscillate back and forth to perform simple harmonic vibration on the limit plate when moving along the surface of the limit plate, and then the static friction structure between the particles of the cooked product can be destroyed during the vibration of the limit plate, so as to realize the three-dimensional spatial reorganization of the cooked product and eliminate local gaps at the same time, thereby avoiding the risk of bag deformation caused by uneven material distribution during vacuum packaging. After the cooked product is loaded, the splint can move along the limit plate and press the cooked product inside the packaging bag through the limit plate, dynamically eliminate discrete air cavities in the packaging bag, reduce the gaps between the cooked products inside the packaging bag and form a dense material layer, thereby ensuring the flatness of the surface of the packaging bag during subsequent vacuuming. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0028] Figure 2 It is a schematic diagram of the three-dimensional installation structure between the placement block, the supporting rod and the limiting plate of the present invention.

[0029] Figure 3 It is a schematic diagram of the three-dimensional installation structure between the lifting frame, the electric slider and the vertical frame of the present invention.

[0030] Figure 4 The present invention Figure 3 A partial enlarged view of point A in the middle.

[0031] Figure 5 The present invention Figure 3 A partial enlarged view of point B in the middle.

[0032] Figure 6 It is a schematic diagram of the three-dimensional installation structure between the placement block, the opening and closing block and the rotating shaft of the present invention.

[0033] Figure 7 It is a schematic diagram of the internal structure of the placement block of the present invention (viewed from the vertical frame toward the corresponding limit plate).

[0034] Figure 8 It is a schematic diagram of the three-dimensional installation structure between the vertical frame, the lifting frame and the driving cylinder of the present invention.

[0035] Figure 9 It is a schematic diagram of the three-dimensional installation structure between the toggle rod, the reciprocating rod and the linkage rod of the present invention.

[0036] Figure 10 The present invention Figure 9 A partial enlarged view of point C in the middle.

[0037] Figure 11 The present invention is a flow chart of the vacuum fresh-keeping packaging method for cooked products.

[0038] Description of reference numerals: 1. conveying frame; 11. vertical frame; 12. conveying roller; 13. horizontal frame; 14. vertical frame; 141. lifting frame; 142. driving cylinder; 143. adjusting frame; 144. adjusting plate; 145. two-way cylinder; 146. clamping plate; 147. rotating roller; 15. electric slider; 2. conveyor belt; 3. placing mechanism; 31. placing block; 311. opening and closing block; 312. rotating shaft ; 313, opening and closing frame; 314, linkage cylinder; 315, pressure rod; 32, supporting rod; 321, connecting block; 322, snap-in groove; 323, telescopic connecting rod; 33, limit plate; 4, adjustment mechanism; 41, lifting frame; 411, sliding plate; 42, toggle frame; 421, toggle protrusion; 43, toggle rod; 431, reciprocating rod; 432, linkage rod; 433, vertical connecting rod; 434, adjustment protrusion. DETAILED DESCRIPTION

[0039] The following is combined with Figures 1 to 11 This application is described in further detail.

[0040] The embodiments of the present application disclose a vacuum fresh-keeping packaging device and method for cooked products. The cooked products in the packaging bag are stirred and shaken in coordination so that the cooked products in the packaging bag are evenly and tightly distributed inside the packaging bag, thereby avoiding wrinkle defects on the surface of the packaging bag during subsequent vacuuming.

[0041] Embodiment 1: Reference Figure 1 A vacuum fresh-locking packaging device for cooked products comprises a conveying frame 1 for conveying packaging bags, a conveying belt 2 is arranged on the conveying frame 1, and a placing mechanism 3 and an adjusting mechanism 4 are installed on the conveying frame 1.

[0042] Reference Figure 2 , the placement mechanism 3 comprises: There are multiple placement blocks 31 , which are evenly distributed along the length direction of the conveyor belt 2 .

[0043] There are multiple groups of supporting rods 32 corresponding to the placement blocks 31 one by one. Each group of supporting rods 32 is symmetrically installed on the placement blocks 31 along the length direction of the conveyor belt 2 and is synchronously opened and closed along the length direction of the conveyor belt 2.

[0044] The limiting plate 33 is arranged at the bottom of the supporting rod 32 and is used to limit the packaging bag.

[0045] Reference Figure 3 , the regulating mechanism 4 comprises: The lifting frame 41 is arranged above the conveyor belt 2 and moves up and down along the height direction of the conveyor frame 1.

[0046] There are two sets of toggling frames 42 symmetrically arranged along the width direction of the lifting frame 41. Each set of toggling frames 42 is evenly arranged along the length direction of the lifting frame 41 and moves synchronously along the width direction of the lifting frame 41.

[0047] Toggling rods 43 are arranged between the two sets of toggling frames 42 and are arranged in multiple numbers along the length direction of the lifting frame 41 and reciprocate along the length direction of the lifting frame 41. The toggling rods 43 are of telescopic structure.

[0048] In the packaging bag processing process, the supporting rod 32 is driven by an opposite displacement movement to realize the precise unfolding of the packaging bag mouth. When the toggling frame 42 performs radial expansion, its separated movement can effectively break the unexpected adhesion generated on the inner wall of the packaging bag body due to the electrostatic adsorption effect; when the cooked product filling process is completed, the limiting plate 33 can limit the packaging bag to prevent the bottom accumulation phenomenon caused by the instantaneous settlement of the high-density cooked product, and at the same time avoid the surface wrinkle defect of the packaging bag body caused by uneven distribution of the cooked product during the vacuum packaging stage.

[0049] Refer to Figure 1 and Figure 3 , the conveying frame 1 includes two vertical frames 11. Conveying rollers 12 are installed on both of the two vertical frames 11 through bearings, and the conveyor belt 2 is installed between the two conveying rollers 12. A horizontal frame 13 is jointly installed between the two vertical frames 11. A vertical frame 14 is installed on the horizontal frame 13. An electric slider 15 is installed on the vertical frame 11, and the lifting frame 41 is installed on the electric slider 15.

[0050] Refer to Figures 3 to 5 , a sliding plate 411 corresponding to each set of toggling frames 42 is arranged at the bottom of the lifting frame 41, and the toggling frame 42 is installed at the bottom of the corresponding sliding plate 411. A toggling protrusion 421 is arranged at the bottom of the toggling frame 42. Connecting blocks 321 are symmetrically installed on the supporting rod 32 along its length direction. A clamping groove 322 is formed on the connecting block 321, and a telescopic connecting rod 323 corresponding to the clamping groove 322 is installed on the sliding plate 411.

[0051] Among them, such as Figure 1The direction of the arrow shown is the conveying direction of the conveyor belt 2. Specifically, during operation, before the conveyor belt 2 starts working, place the packaging bag between the supporting rods 32 corresponding to the placing block 31 at the starting position of the conveyor. Then, drive the conveying roller 12 to rotate through an existing drive motor (which is prior art and will not be elaborated or shown in the figure), and the conveying roller 12 drives the conveyor belt 2 to move during rotation. During the movement of the conveyor belt 2, the supporting rod 32 with the packaging bag is driven by the placing block 31 to move to the bottom of the lifting frame 41. At this time, start the electric slider 15 to drive the lifting frame 41 to move downward. During the downward movement of the lifting frame 41, the shifting frame 42 and the shifting protrusion 421 are driven by the sliding plate 411 to insert into the interior of the packaging bag. The shifting protrusion 421 can increase the contact area between the bottom of the shifting frame 42 and the packaging bag, making the opening of the packaging bag body more thorough and avoiding the possibility of scratching the packaging bag by the bottom of the shifting frame 42.

[0052] At this time, the shifting rod 43 synchronously enters the interior of the packaging bag, and during the downward movement of the lifting frame 41, the telescopic connecting rod 323 also engages into the engaging groove 322, and the telescopic connecting rod 323 and the engaging groove 322 cooperate with each other to clamp the opening of the packaging bag on the connecting block 321. The telescopic connecting rod 323 can be lengthened to avoid rigid collision with the supporting rod 32.

[0053] In addition, a supporting connecting plate for supporting the placing block 31 directly below the lifting frame 41 is also installed on the vertical frame 14 to prevent the supporting rod 32 from shaking during the loading of cooked products, which may cause the corresponding placing block 31 to shake on the conveyor belt 2.

[0054] Refer to Figure 6 and Figure 7 , a clamping block 311 corresponding to the supporting rod 32 and automatically resetting is slidably arranged at one end of the placing block 31 close to the limiting plate 33. A rotating shaft 312 is installed at one end of the supporting rod 32 close to the corresponding clamping block 311, and the rotating shaft 312 is installed on the corresponding clamping block 311 through a bearing.

[0055] The rotating shaft 312 enables the supporting rod 32 and the limiting plate 33 to rotate around the axis plane of the rotating shaft 312 through the rotating shaft 312 when entering the turning area of the conveyor belt 2 during the upper half-section conveying of the conveyor belt 2, rather than reversing synchronously with the reverse rotation movement of the lower half-section of the conveyor belt 2. Thus, it is avoided that the supporting rod 32 and the limiting rod 112 flip with the flipping of the placing block 31, resulting in a collision between the limiting plates 33 on the upper and lower halves of the conveyor belt 2, playing a role in making way for the limiting plate 33.

[0056] The support frame 111 and the limiting rod 112 cooperate with each other to limit the supporting rod 32, preventing the supporting rod 32 from rotating around the rotating shaft 312 during the loading of cooked products, which affects the stability of the placement of the packaging bag.

[0057] Refer toFigure 3 as well as Figure 7 A tensioning frame 313 is slidably arranged inside the placement block 31 along its height direction, and an automatically reset linkage cylinder 314 is slidably arranged on the top of the placement block 31 along its height direction. The linkage cylinder 314 is connected to the corresponding tensioning frame 313, and a pressure rod 315 matching the linkage cylinder 314 is installed on the lifting frame 41.

[0058] The linkage cylinder 314 is provided with a circular protrusion, and the linkage cylinder 314 is sleeved with a return spring, one end of the return spring is installed on the placement block 31, and the other end of the return spring is installed on the circular protrusion, and the bottom of the stretching and closing frame 313 is symmetrically provided with inclined surfaces along the width direction of the lifting frame 41, and the placement block 31 is provided with a telescopic spring for resetting the stretching and closing block 311. During specific operation, the lifting frame 41 is synchronously driven to move downward during the downward movement of the lifting frame 41. When the pressure rod 315 moves downward, it contacts the circular protrusion and drives the linkage cylinder 314 to move downward. During the downward movement of the linkage cylinder 314, the stretching and closing frame 313 is driven downward. During the downward movement of the stretching and closing frame 313, its inclined surface is in contact with the stretching and closing block 311 and drives the stretching and closing block 311 to move away. During the movement of the stretching and closing block 311, the supporting rod 32 is driven to open through the rotating shaft 312, thereby opening the packaging bag mouth.

[0059] The reset spring resets the linkage cylinder 314 when the pressure rod 315 is separated from the circular protrusion, and the telescopic spring rod can reset the opening and closing block 311 when the opening and closing frame 313 moves upward.

[0060] During the opening process of the supporting rod 32, the connecting block 321 and the telescopic connecting rod 323 cooperate with each other to drive the sliding plate 411 to move. During the movement of the sliding plate 411, the toggle frame 42 is simultaneously driven to move. During the movement of the toggle frame 42, the packaging bag body can be further opened to avoid the possibility that the part of the packaging bag located between adjacent toggle frames 42 is still sticky and not fully opened.

[0061] After the packaging bag is opened, the cooked product is poured from the bottom of the lifting frame 41 and between the two supporting rods 32 into the packaging bag.

[0062] Reference Figures 8 to 10 In order to ensure the uniformity and density of the cooked products in the packaging bag, the splint 146 provided by the present invention can compact the cooked products in the packaging bag through the limit plate 33. Specifically, the limit plate 33 is slidably installed at the bottom of the supporting rod 32 and automatically resets. A lifting frame 141 is slidably installed on the vertical frame 14. A driving cylinder 142 is installed on the lifting frame 141 through a lifting cylinder. An adjusting frame 143 is installed at the telescopic end of the driving cylinder 142. An adjusting plate 144 for adjusting the spacing between the limit plates 33 is symmetrically installed along the width direction of the lifting frame 141 on the side of the adjusting frame 143 away from the driving cylinder 142.

[0063] A bidirectional cylinder 145 is installed on the adjustment frame 143 through a cylinder seat, and a clamping plate 146 is installed at the telescopic end of the bidirectional cylinder 145. A rectangular groove is opened on the opposite surface of the clamping plate 146, and a rotating roller 147 that cooperates with the limit plate 33 is installed inside the rectangular groove through a bearing.

[0064] A reciprocating rod 431 is installed on the top of the toggle rod 43. An automatically reset linkage rod 432 is slidably arranged on the vertical frame 14, and the linkage rod 432 is connected to the reciprocating rod 431. A through groove is provided at one end of the linkage rod 432 away from the reciprocating rod 431. A vertical connecting rod 433 is installed on the lifting frame 141, and the vertical connecting rod 433 passes through the through groove. A plurality of adjustment protrusions 434 are evenly arranged on the vertical connecting rod 433 along its length direction.

[0065] The opposite surface of the adjustment plate 144 is provided with a guiding inclined surface, and the supporting rod 32 is provided with an elastic telescopic rod (not shown in the figure) for resetting the limit plate 33. The telescopic end of the toggle rod 43 is limitedly slidably arranged on the lifting frame 41, that is, the telescopic section of the toggle rod 43 can move up and down under the drive of the lifting frame 41, and the telescopic end of the toggle rod 43 can also slide back and forth along its length direction on the lifting frame 41. During specific operation, the driving cylinder 142 is started according to the thickness of the cooked product contained in the packaging bag. During the movement of the telescopic end of the driving cylinder 142, the adjusting plate 144 is driven to move through the adjusting frame 143. During the movement of the adjusting plate 144, its guiding inclined surface contacts the limit plate 33 and drives the limit plate 33 to move toward each other by a specified distance, so that the spacing between the limit plates 33 is the same as the thickness of the cooked product contained in the required packaging bag.

[0066] Furthermore, the two limiting plates 33 cooperate with each other to limit the packaging bag to prevent the bottom accumulation caused by the instantaneous settlement of high-density cooked products, thereby evenly distributing the cooked products.

[0067] When the guiding bevel on the adjusting plate 144 contacts the limiting plate 33, the clamping plate 146 moves synchronously to both sides of the limiting plate 33. It should be noted that the tangent of the rotating roller 147 close to the limiting plate 33 and the critical line of contact between the guiding bevel and the limiting plate 33 are located on the same vertical plane, thereby ensuring that the rotating roller 147 is synchronously attached to the limiting plate 33 when the adjusting plate 144 contacts the limiting plate 33.

[0068] When the adjustment plate 144 and the clamping plate 146 are adjusted, when the cooked product is poured into the packaging bag, the lifting frame 141 is driven by an external driving force to reciprocate along the length direction of the vertical frame 14, and the two-way cylinder 145 is started during the movement of the lifting frame 141. The telescopic end of the two-way cylinder 145 drives the clamping plate 146 to swing back and forth along its movement direction. During the reciprocating swing of the clamping plate 146, the rotating roller 147 is driven to knock the limit plate 33, and then the limit plate 33 resonates and drives the cooked product inside the packaging bag to vibrate synchronously. During the vibration of the limit plate 33, the static friction structure between the particles of the cooked product can be destroyed, so that the cooked product can be reorganized in three-dimensional space and the local gap can be eliminated at the same time, avoiding the risk of bag deformation caused by uneven material distribution during vacuum packaging.

[0069] It should be noted that when the lifting frame 41 drives the toggle frame 42 to move downward, it simultaneously drives the toggle rod 43 to move downward and enter the packaging bag, and the adjusting protrusion 434 is a continuous tooth structure. During the reciprocating movement of the lifting frame 141, it drives the vertical connecting rod 433 to move reciprocally up and down. A return spring rod for resetting the linkage rod 432 is installed on the vertical frame 14. During the reciprocating movement of the vertical connecting rod 433, the linkage rod 432 can be driven to move closer to the vertical connecting rod 433 by adjusting the inclined surface on the upper side of the protrusion 434. Whenever the linkage rod 432 passes through the inclined surface on the lower side of the adjusting protrusion 434, it is reset by the return spring rod to make the linkage rod 432 move away from the vertical connecting rod 433. Repeating the above actions and cooperating with the return spring rod can drive the linkage rod 432 to move reciprocally along its length direction.

[0070] During the reciprocating movement of the linkage rod 432, the reciprocating rod 431 synchronously drives the toggle rod 43 to reciprocate. During the reciprocating movement of the toggle rod 43, the cooked products inside the packaging bag can be stirred to make the cooked products closer together, avoiding wrinkles caused by the cooked products being too loose during vacuuming, thereby affecting the flatness of the surface of the cooked product packaging bag.

[0071] When the cooked product is filled, the toggle rod 43 and the toggle frame 42 are reset, and finally the opening of the packaging bag is heat-sealed to obtain the vacuum-packed cooked product.

[0072] Example 2: Reference Figure 8 On the basis of the first embodiment, when the cooked product inside the packaging bag is filled, the electric slider 15 cooperates with the lifting frame 41 to drive the toggle frame 42 and the toggle rod 43 to be removed from the packaging bag. At this time, due to the obstruction of the cooked product, the limit plate 33 will not move toward each other through the supporting rod 32. At this time, the lifting frame 141 moves to the bottom of the limit plate 33, and restarts the two-way cylinder 145 so that its telescopic end drives the rotating roller 147 to tightly rest on the limit plate 33 through the clamping plate 146, that is, at this time, the two-way cylinder 145 no longer drives the clamping plate 146 to reciprocate and knock the limit plate 33.

[0073] The lifting frame 141 is then driven upward by external force, and the lifting frame 141 drives the clamping plate 146 to move upward during the upward movement. Then, the clamping plate 146 can move along the limiting plate 33 and cooperate with the rotating roller 147 through the limiting plate 33 to press the cooked products inside the packaging bag, dynamically eliminate discrete air cavities in the packaging bag, reduce the gaps between the cooked products inside the packaging bag and form a dense material layer, thereby ensuring the flatness of the surface of the packaging bag during subsequent vacuuming.

[0074] Finally, refer to Figure 11 The present invention also provides a method for vacuum fresh-keeping packaging of cooked products, comprising the following steps: S1: preparation for placement, placing the packaging bag between the supporting rods 32 corresponding to the placement block 31 at the start of transportation, and making the opening of the packaging bag clamped on the connecting block 321.

[0075] S2: The bag is transported and opened, and the bag opening is then driven by the existing driving motor to rotate the conveying roller 12, which drives the conveying belt 2 to move during the rotation of the conveying roller 12, and the conveying belt 2 moves through the placement block 31 to drive the supporting rod 32 with the bag to move to the bottom of the lifting frame 41 during the movement.

[0076] S3: Bagging process. According to the thickness of the cooked product in the packaging bag, the driving cylinder 142 is started. During the movement of the telescopic end of the driving cylinder 142, the adjusting frame 143 is adjusted to drive the adjusting plate 144 to move. During the movement of the adjusting plate 144, its guiding inclined surface contacts the limit plate 33 and drives the limit plate 33 to move toward each other for a specified distance. After the adjustment of the adjusting plate 144 and the clamping plate 146 is completed.

[0077] When pouring the cooked product into the packaging bag, the lifting frame 141 is driven by an external driving force to reciprocate along the length direction of the vertical frame 14, and the two-way cylinder 145 is started during the movement of the lifting frame 141. The telescopic end of the two-way cylinder 145 drives the clamping plate 146 to swing back and forth along its movement direction. During the reciprocating swing of the clamping plate 146, the rotating roller 147 is driven to knock the limit plate 33, and then the limit plate 33 resonates to drive the cooked product inside the packaging bag to vibrate synchronously. During the reciprocating movement of the linkage rod 432, the toggle rod 43 is synchronously driven to reciprocate through the reciprocating rod 431, and the cooked product inside the packaging bag can be stirred during the reciprocating movement of the toggle rod 43.

[0078] S4: Vacuum treatment: vacuum the packaging bag containing the cooked product, and finally perform heat sealing.

[0079] It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics thereof. Therefore, in any respect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Accordingly, all changes that fall within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0080] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative manner of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in the various embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vacuum fresh-keeping packaging device for cooked products, comprising a conveying rack (1) for conveying packaging bags, and a conveyor belt (2) is arranged on the conveying rack (1), characterized in that: A placing mechanism (3) and an adjusting mechanism (4) are installed on the conveying rack (1). The placing mechanism (3) includes: Placing blocks (31), multiple of which are provided and evenly distributed along the length direction of the conveyor belt (2); Supporting rods (32), multiple groups of which are provided and correspond to the placing blocks (31) one by one. Each group of supporting rods (32) is symmetrically installed on the placing block (31) along the length direction of the conveyor belt (2) and expands and contracts synchronously along the length direction of the conveyor belt (2); Limit plates (33), which are arranged at the bottom of the supporting rods (32) and are used for limiting the packaging bags; The adjusting mechanism (4) includes: A lifting rack (41), which is arranged above the conveyor belt (2) and moves up and down along the height direction of the conveying rack (1); Poking racks (42), two groups of which are symmetrically arranged along the width direction of the lifting rack (41), and multiple of each group of poking racks (42) are evenly arranged along the length direction of the lifting rack (41) and move synchronously along the width direction of the lifting rack (41); Poking rods (43), which are arranged between the two groups of poking racks (42) and multiple of them are arranged along the length direction of the lifting rack (41) and reciprocate along the length direction of the lifting rack (41).

2. The vacuum fresh-keeping packaging device for cooked products according to claim 1, wherein: The conveying rack (1) includes two vertical racks (11). Conveyor rollers (12) are installed on both of the two vertical racks (11) through bearings, and the conveyor belt (2) is installed between the two conveyor rollers (12). A horizontal rack (13) is commonly installed between the two vertical racks (11). A vertical rack (14) is installed on the horizontal rack (13). An electric slider (15) is installed on the vertical rack (11), and the lifting rack (41) is installed on the electric slider (15).

3. A vacuum fresh-keeping packaging device for cooked products according to claim 1, characterized in that: A sliding plate (411) corresponding to each group of poking racks (42) is arranged at the bottom of the lifting rack (41), and the poking rack (42) is installed at the bottom of the corresponding sliding plate (411). A poking protrusion (421) is arranged at the bottom of the poking rack (42). Connecting blocks (321) are symmetrically installed on the supporting rod (32) along its length direction. A clamping groove (322) is formed on the connecting block (321). A telescopic connecting rod (323) corresponding to the clamping groove (322) is installed on the sliding plate (411).

4. A vacuum fresh-keeping packaging device for cooked products according to claim 2, characterized in that: The limit plate (33) is slidably installed at the bottom of the supporting rod (32) and automatically resets. A lifting rack (141) is slidably installed through the vertical rack (14). A driving cylinder (142) is installed on the lifting rack (141) through a lifting cylinder. An adjusting rack (143) is installed at the telescopic end of the driving cylinder (142). Adjusting plates (144) for adjusting the distance between the limit plates (33) are symmetrically installed on one side of the adjusting rack (143) away from the driving cylinder (142) along the width direction of the lifting rack (141).

5. The vacuum fresh-keeping packaging device for cooked products according to claim 4, characterized in that: A two-way cylinder (145) is installed on the adjusting rack (143) through a cylinder seat. A clamping plate (146) is installed at the telescopic end of the two-way cylinder (145). A rectangular groove is formed on the opposite surfaces of the clamping plate (146). A rotating roller (147) cooperating with the limit plate (33) is installed inside the rectangular groove through a bearing.

6. The vacuum fresh-keeping packaging device for cooked products according to claim 1, wherein: A reciprocating rod (431) is commonly installed at the top of the toggle rod (43). A linkage rod (432) with automatic reset is slidably arranged through the vertical frame (14). The linkage rod (432) is connected to the reciprocating rod (431). A through groove is formed at one end of the linkage rod (432) away from the reciprocating rod (431). A vertical connecting rod (433) is installed on the lifting frame (141), and the vertical connecting rod (433) passes through the through groove. A plurality of adjusting protrusions (434) are uniformly arranged along the length direction of the vertical connecting rod (433).

7. The vacuum fresh-keeping packaging device for cooked products according to claim 2, characterized in that: A clamping block (311) corresponding to the supporting rod (32) and with automatic reset is slidably arranged at one end of the placing block (31) close to the limiting plate (33). A rotating shaft (312) is installed at one end of the supporting rod (32) close to the corresponding clamping block (311), and the rotating shaft (312) is installed on the corresponding clamping block (311) through a bearing.

8. A vacuum fresh-keeping packaging device for cooked products according to claim 1, characterized in that: A clamping frame (313) is slidably arranged inside the placing block (31) along the height direction. A linkage cylinder (314) with automatic reset is slidably arranged at the top of the placing block (31) along the height direction. The linkage cylinder (314) is connected to the corresponding clamping frame (313). A pressing rod (315) matched with the linkage cylinder (314) is installed on the lifting frame (41).

9. The vacuum fresh-keeping packaging device for cooked products according to claim 7, wherein: Support frames (111) are installed on both of the two vertical frames (11). A limiting rod (112) for limiting the supporting rod (32) is commonly installed between the two support frames (111).

10. A method for vacuum fresh-keeping packaging of cooked products, including a vacuum fresh-keeping packaging device for cooked products as described in any one of claims 1-9, characterized in that, Its using method includes the following steps: S1: Placing preparation. Place the packaging bag between the corresponding supporting rods (32) of the placing block (31) at the start of conveying, and make the bag mouth of the packaging bag clamped on the connecting block (321). S2: Conveying and opening the bag. Move the placing block (31) with the packaging bag to the bottom of the lifting frame (41), and open the packaging bag through the toggle frame (42). S3: Bagging treatment. Put the cooked products to be packaged into the packaging bag through the bag mouth of the packaging bag, and homogenize the cooked products inside the packaging bag. S4: Vacuum pumping treatment. Perform vacuum pumping treatment on the packaging bag filled with cooked products, and finally perform heat sealing treatment.

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