Prefabricated vegetable production line and film tensioning device thereof

Abstract

The film tensioning device comprises a first conveying mechanism, a first roller and a plurality of tensioning mechanisms, the first conveying mechanism comprises two conveyor belts which are closed end to end, the two conveyor belts are symmetrically arranged in a left-right spaced mode, the first roller is arranged between the two conveyor belts, and the tensioning mechanisms are arranged on the first roller. The axial direction of the first roller extends in the left-right direction, a plurality of tensioning mechanisms are sequentially arranged in the length direction of each conveying belt, each tensioning mechanism comprises a first frame, a second frame and an elastic piece, the first frames and the second frames can be connected in an up-down sliding and sleeving mode, and the first frames are provided with first connecting plates and third connecting plates. The tensioning mechanism is arranged on the inner side of the conveying belt through a second frame, the second frame is provided with a second connecting plate located between the first connecting plate and the third connecting plate, and elastic pieces are arranged on the first connecting plate and the second connecting plate. According to the device, through an automatic tensioning mechanism, continuous and efficient tensioning in the thin film conveying process is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pre-prepared food production equipment, in particular to a pre-prepared food production line and a film tensioning device thereof. Background Art

[0002] Pre-prepared meals are convenient dishes that are made using modern standardized assembly line operations. The raw materials are processed hygienically and scientifically and then packaged. When they are needed, they can be eaten directly after a simple heating step.

[0003] The existing process of preparing pre-prepared dishes is:

[0004] Food preparation: Follow the normal pre-prepared meal production process to complete the selection, processing, cooking and seasoning of ingredients to produce fully cooked or partially cooked pre-prepared dishes that only need to be simply reheated before consumption.

[0005] Loading into the receiving groove: The prepared pre-prepared dishes are placed in the receiving groove of the specially designed container plate. The container plate may be made of disposable plastic, aluminum foil or other food-grade materials, and the container plate includes a plurality of receiving grooves protruding downward and a connecting portion connecting the plurality of receiving grooves together.

[0006] Coating: The entire container filled with pre-prepared dishes is coated, that is, the film is tightly attached to the opening of the container through heating and pressure to form a sealing layer to ensure that the dishes are isolated from the external environment and prevent contamination and moisture evaporation.

[0007] Cutting container plates: Make precise cuts on the laminated container plates, using a cutting blade from top to bottom to divide the entire trough into individual pre-prepared meal units.

[0008] Labeling and packaging: Each individual cut pre-prepared dish may also need to be labeled with necessary information such as product name, ingredient list, nutritional content, production date, shelf life, heating guidelines, etc.

[0009] In the current pre-prepared food production process, the film laying process still relies on manual operation, which is not only labor-intensive and inefficient, but also leads to increased production costs. This series of actions is time-consuming and labor-intensive, easily causing human fatigue, and is also inefficient compared to automated equipment. Utility Model Content

[0010] To this end, it is necessary to provide a pre-prepared food production line and a film tensioning device thereof to solve the problem that in the current pre-prepared food production process, the film laying process still relies on manual operation.

[0011] To achieve the above-mentioned purpose, the present embodiment provides a film tensioning device, including a first conveying mechanism, a first roller and a plurality of tensioning mechanisms, wherein the first conveying mechanism includes two conveyor belts closed end to end, the two conveyor belts are spaced apart and symmetrically arranged left and right, the first roller is arranged between the two conveyor belts, the axial direction of the first roller extends in the left and right direction, and a plurality of tensioning mechanisms are sequentially arranged in the length direction of each conveyor belt, the tensioning mechanism includes a first frame, a second frame and an elastic member, the first frame and the second frame can be slidably sleeved up and down, the first frame is provided with a first connecting plate and a third connecting plate, the tensioning mechanism is arranged on the inner side of the conveyor belt through the second frame, the second frame is provided with a second connecting plate located between the first connecting plate and the third connecting plate, one end of the elastic member is arranged on the first connecting plate, the other end of the elastic member is arranged on the second connecting plate, the tensioning mechanism moves following the movement of the conveyor belt, and the first roller is located on the travel path of the first connecting plate;

[0012] When the first connecting plate contacts the first roller, the first frame and the second frame move away from each other, the second connecting plate and the third connecting plate are separated to form an opening for clamping the film, and the elastic member is compressed. When the first connecting plate is separated from the first roller, the elastic force of the elastic member resets the second connecting plate to press the third connecting plate.

[0013] Furthermore, it also includes a vertical pole, one end of which is arranged on the side of the second connecting plate facing the first connecting plate, the first connecting plate is provided with a through hole for the vertical pole to extend out, and the vertical pole is covered with the elastic member, which is a spring.

[0014] Furthermore, a protrusion is provided on a side of the first connecting plate facing the first roller, and the protrusion is used to contact the first roller.

[0015] Furthermore, the second frame includes a back plate and left and right side plates arranged on the inner side of the back plate, a sliding groove for the first frame to slide is formed between the left and right side plates, and the second connecting plate is provided on the back plate, and the second connecting plate extends into the first frame.

[0016] Furthermore, the first frame is a rectangular frame, and the left and right outer walls of the first frame are slidably connected to the slide groove. The first frame and the second frame are also provided with a limiting structure for preventing the first frame from escaping from the slide groove, and the first connecting plate, the second connecting plate, and the third connecting plate are parallel to each other.

[0017] Furthermore, the conveyor belt is a chain.

[0018] Furthermore, the first conveying mechanism also includes a plurality of sprockets, which are respectively engaged with the chains, and one of the sprockets is coaxially arranged with the first roller.

[0019] Furthermore, it also includes a second conveying mechanism, which includes a second roller, a film is disposed on the outer cover of the second roller, and the second roller is located on one side of the first roller.

[0020] To achieve the above purpose, the present embodiment further provides a pre-prepared food production line, comprising:

[0021] A film tensioning device, wherein the film tensioning device is the film tensioning device described in any one of the above embodiments; and

[0022] A cutting device is arranged between the two conveyor belts in the film tensioning device, and is used for cutting the film clamped by the second connecting plate and the third connecting plate in the film tensioning device and the container plate heat-sealed with the film.

[0023] Furthermore, the cutting device includes a first frame, a first cutting blade, a linear motion mechanism, a second frame, a second cutting blade and a second motor. The linear motion mechanism is arranged on the first frame, and the linear motion mechanism is connected to the first cutting blade, and is used to drive the first cutting blade to rise and fall. The direction of the first cutting blade is along the width direction of the first conveying mechanism. The first cutting blade and the second cutting blade are arranged in sequence along the conveying direction of the first conveying mechanism. The second cutting blade is arranged on the second frame through a rotating shaft. The second cutting blade rotates following the rotation of the rotating shaft. The axial direction of the second cutting blade is along the width direction of the conveying mechanism. The rotating shaft is connected to the second motor.

[0024] Different from the prior art, the above technical solution has the following beneficial effects:

[0025] Through the automated and precise film tensioning mechanism, the device can automatically and continuously tension and accurately transport the film to the preset position, significantly reducing or even eliminating the need for manual intervention. This automated process not only greatly improves production efficiency and reduces labor costs, but also ensures uniform film coverage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the film tensioning device clamping the film in this embodiment;

[0027] Figure 2 is a schematic diagram of the first conveying mechanism and the tensioning device in this embodiment;

[0028] Figure 3It is a schematic diagram of the opening formed by the second connecting plate and the third connecting plate in the tensioning device in this embodiment;

[0029] Figure 4 Schematic diagram of the second connecting plate and the third connecting plate clamping the film in the tensioning device of this embodiment;

[0030] Figure 5 is one of the schematic diagrams of the tensioning mechanism and the first roller in the tensioning device in this embodiment;

[0031] Figure 6 The second schematic diagram of the tensioning mechanism and the first roller in the tensioning device in this embodiment;

[0032] Figure 7 The third schematic diagram of the tensioning mechanism and the first roller in the tensioning device in this embodiment;

[0033] Figure 8 This is one of the schematic diagrams of the pre-prepared food production line in this embodiment;

[0034] Fig. 9 This is the second schematic diagram of the pre-prepared food production line in this embodiment;

[0035] Fig.10 is a schematic diagram of the second cutting blade, the second motor and the rotating shaft in this embodiment;

[0036] Fig.11 Schematic diagram of the first cut and the second cut in this embodiment.

[0037] Description of reference numerals:

[0038] 1. The first conveying mechanism;

[0039] 11. conveyor belt; 111. chain; 12. sprocket; 13. housing;

[0040] 2. The first roller;

[0041] 3. Film;

[0042] 4. Tensioning mechanism;

[0043] 41. First frame;

[0044] 411, first connecting plate; 4111, bump; 412, third connecting plate;

[0045] 42. Second frame;

[0046] 421, second connecting plate; 422, back plate; 423, side plate;

[0047] 43. Elastic parts;

[0048] 44. Pole;

[0049] 5. Cutting device;

[0050] 51. first frame; 52. first cutting blade; 53. linear motion mechanism;

[0051] 54. second frame; 55. second cutting blade; 56. second motor; 57. rotating shaft;

[0052] 58, first incision; 59, second incision;

[0053] 6. Container plate. DETAILED DESCRIPTION

[0054] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0055] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0056] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0057] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0058] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0059] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0060] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0061] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0062] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0063] See also Figures 1 to 7The present embodiment provides a film tensioning device, including a first conveying mechanism 1, a first roller 2 and a plurality of tensioning mechanisms 4. The first conveying mechanism 1 includes two conveyor belts 11 that are closed end to end. The two conveyor belts 11 are spaced apart and symmetrically arranged. A first roller 2 shaft is arranged between the two conveyor belts 11. The axial direction of the first roller 2 extends in the left-right direction. A plurality of tensioning mechanisms 4 are sequentially arranged in the length direction of each conveyor belt 11. The tensioning mechanism 4 includes a first frame 41, a second frame 42 and an elastic member 43. The first frame 41 and the second frame 42 can be The first frame 41 is slidably connected up and down, and is provided with a first connecting plate 411 and a third connecting plate 412. The tensioning mechanism 4 is provided on the inner side of the conveyor belt 11 through the second frame 42. The second frame 42 is provided with a second connecting plate 421 located between the first connecting plate 411 and the third connecting plate 412. One end of the elastic member 43 is provided on the first connecting plate 411, and the other end of the elastic member 43 is provided on the second connecting plate 421. The tensioning mechanism 4 moves with the movement of the conveyor belt 11, and the first roller 2 is located on the travel path of the first connecting plate 411;

[0064] See also Figure 3 , Figure 5 , Figure 6 and Figure 7 When the first connecting plate 411 contacts the first roller 2, the first frame 41 and the second frame 42 move away from each other, the second connecting plate 421 and the third connecting plate 412 separate to form an opening for clamping the film 3, and the elastic member 43 is compressed. Figure 4 , Figure 5 , Figure 6 and Figure 7 When the first connecting plate 411 is separated from the first roller 2 , the elastic force of the elastic member 43 causes the second connecting plate 421 to return to its original position to press the third connecting plate 412 .

[0065] Since the conveyor belt 11 is closed, the tensioning mechanism 4 on the upper part of the conveyor belt 11 is opposite to the tensioning mechanism 4 on the lower part. The first connecting plate 411 of the tensioning mechanism 4 on the upper part of the conveyor belt 11 is located at the bottom, and the third connecting plate 412 is located at the top. Figure 3 and Figure 4 As shown, the first connecting plate 411 of the tensioning mechanism 4 on the lower part of the conveyor belt 11 is located at the top, and the third connecting plate 412 is located at the bottom. Figure 2 Similarly, the tensioning mechanism 4 on the left portion of the conveyor belt 11 is opposite to the tensioning mechanism 4 on the right portion. Figure 5 , Figure 6 , Figure 7 The tensioning mechanism 4 on the right side is located on the right part of the conveyor belt 11. Figure 5 , Figure 6 , Figure 7The tensioning mechanism 4 on the lower side is located on the lower part of the conveyor belt 11. Figure 5 , Figure 6 , Figure 7 The upper tensioning mechanism 4 is located on the upper part of the conveyor belt 11.

[0066] The first roller 2 is located at the end of the conveyor belt 11. Near the position of the first roller 2, the conveyor belt 11 undergoes a process from bottom to top. For example, Figure 5 , Figure 6 , Figure 7 It is shown that the first roller 2 is located at the right end of the conveyor belt. Taking the tensioning mechanism 4 located on the lower part of the conveyor belt 11 as an example, the first connecting plate 411 of the tensioning mechanism 4 located on the lower part of the conveyor belt 11 is located at the top, and the third connecting plate 412 is located at the bottom. When the first connecting plate 411 of the tensioning mechanism 4 contacts the first roller 2, the first frame 41 is subjected to force and moves relative to the second frame 42, that is, the first connecting plate 411 and the third connecting plate 412 move downward synchronously, squeezing the elastic member 43 between the first connecting plate 411 and the second connecting plate 421, and the second connecting plate 421 is separated from the third connecting plate 412 to form an opening for clamping the film 3. In the process of the tensioning mechanism 4 gradually moving from the lowest position to the highest position around the first roller 2, the first connecting plate 411 of the tensioning mechanism 4 turns to the left, and the third connecting plate 412 turns to the right. When the tensioning mechanism 4 moves to the highest position, its position changes to the upper part of the conveyor belt 11, the first connecting plate 411 is located at the bottom, and the third connecting plate 412 is located at the top. The film 3 can be filled in the appropriate position of the opening for clamping, so that after the left and right tensioning mechanisms 4 are at the upper part of the conveyor belt 11 and leave the first roller 2, since the first connecting plate 411 is not subjected to force, the elastic force of the elastic member 43 causes the spring to stretch, and the first frame 41 and the second frame 42 move relative to each other, that is, the first connecting plate 411 and the third connecting plate 412 move downward synchronously, and the third connecting plate 412 moves toward the second connecting plate 421 until it is pressed against the second connecting plate 421, so that the film 3 can be clamped. Then the film 3 is transported forward following the left and right tensioning mechanisms 4.

[0067] Through the automated and precise film tensioning mechanism, the device can automatically and continuously tension and accurately transport the film to the preset position, significantly reducing or even eliminating the need for manual intervention. This automated process not only greatly improves production efficiency and reduces labor costs, but also ensures uniform film coverage.

[0068] See also Figure 2 , Figure 3 and Figure 4In this embodiment, the film tensioning device also includes a vertical rod 44, one end of which is arranged on the side of the second connecting plate 421 facing the first connecting plate 411, and the first connecting plate 411 is provided with a through hole for the vertical rod 44 to extend out, and the vertical rod 44 is covered with an elastic member 43, which is a spring.

[0069] One end of the vertical rod 44 is fixed on the second connecting plate 421, and the other end passes through the through hole on the first connecting plate 411. The position where the vertical rod 44 protrudes out of the through hole is also provided with an anti-dropping block, and the diameter of the anti-dropping block is larger than the diameter of the through hole. The vertical rod 44 not only limits the range of motion of the spring, but also guides the first frame 41 to move up and down relative to the second frame 42.

[0070] In some embodiments, the elastic member 43 may be an elastic strip of rubber.

[0071] See also Figure 3 In this embodiment, a protrusion 4111 is extended from the first connecting plate 411 on one side facing the first roller 2 , and the protrusion 4111 is used to contact the first roller 2 .

[0072] Different from the common bottom contact design, the protrusion 4111 here is cleverly set on the side of the first connecting plate 411, rather than the bottom. This unique layout enables it to contact the first roller 2 from the side when it contacts the first roller 2. When the protrusion 4111 contacts the surface of the first roller 2, it can push the first connecting plate 411 and trigger the action of the tensioning mechanism. After the contact occurs, the first frame 41 begins to move up along the vertical rod 44 or other guide structure, triggering a series of actions such as the subsequent opening of the tensioning mechanism 4, the passage of the film 3, and then resetting. The whole process is efficient and precisely controlled.

[0073] In this embodiment, the third connecting plate 412 is provided with a pressing block extending toward the second connecting plate 421, and the third connecting plate 412 presses the film 3 onto the plate-shaped second connecting plate 421 through the pressing block. Preferably, the end of the pressing block facing the second connecting plate 421 is a rounded triangle, which can better clamp the film 3.

[0074] See also Figure 3 In this embodiment, the second frame 42 includes a back plate 422 and two left and right side plates 423 arranged inside the back plate 422. A slide groove for the first frame 41 to slide is formed between the left and right side plates 423. The back plate 422 is provided with a second connecting plate 421, which extends into the first frame 41. The first connecting plate 411, the second connecting plate 421, and the third connecting plate 412 can be parallel to each other. The left and right side walls of the first frame 41 match the slide groove inside the second frame 42, and can slide up and down smoothly in the slide groove. This movement is driven by the force of the elastic member 43 (such as a spring) during the tensioning process of the film 3.

[0075] See also Figure 1 In this embodiment, the first frame 41 is a rectangular frame, and the left and right outer walls of the first frame 41 are slidably connected to the slide groove. The first frame 41 and the second frame 42 are also provided with a limiting structure for preventing the first frame 41 from escaping from the slide groove. The first connecting plate 411, the second connecting plate 421, and the third connecting plate 412 are parallel to each other.

[0076] The first frame 41 is designed to be a rectangular frame, and its left and right outer walls form a sliding fit with the slide groove inside the second frame 42, ensuring the stable sliding of the first frame 41. In order to enhance safety, a limiting structure is also provided between the first frame 41 and the second frame 42, effectively preventing the first frame 41 from accidentally escaping from the slide groove during tensioning or resetting. Optionally, the limiting structure includes limiting grooves provided on the left and right outer walls of the first frame 41, and limiting blocks extending into the limiting grooves are provided on the left and right inner walls of the second frame 42, and the limiting blocks are blocked by the ends of the limiting grooves to play a limiting role.

[0077] See also Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8 In this embodiment, the conveyor belt 11 is a chain 111.

[0078] The chain 111 is made of high-strength metal or engineering plastic, has higher load bearing capacity and durability, and is suitable for heavy loads or film 3 processing scenarios requiring high stability. The closed chain 111 cyclically moves along a predetermined path, driving the tensioning mechanism 4 to cyclically move.

[0079] In this embodiment, the first conveying mechanism 1 further includes a plurality of sprocket wheels 12, which are respectively engaged with the chain 111, wherein one of the sprocket wheels 12 is coaxially arranged with the first roller 2, and the structure is as follows: Figures 5 to 7 The coaxial design of the sprocket 12 and the first roller 2 can optimize the power transmission path and reduce energy loss.

[0080] A plurality of sprockets 12 define the movement trajectory of the chain 111, and the chain 111 circulates stably along a predetermined path. At the same time, the tensioning mechanism 4 on the chain 111 moves to the position of the first roller 2, and its first connecting plate 411 contacts the first roller 2 to achieve the subsequent clamping action. It should be noted that the height of the first connecting plate 411 of the tensioning mechanism 4 located at the lower part of the chain 111 is slightly higher than the lowest position of the first roller 2, so that when the first connecting plate 411 contacts the first roller 2, the first connecting plate 411 can be gradually pushed down by the first roller 2. Similarly, the height of the first connecting plate 411 of the tensioning mechanism 4 located at the upper part of the chain 111 is slightly lower than the highest position of the first roller 2, so that when the first connecting plate 411 contacts the first roller 2, the first connecting plate 411 can be gradually pushed up by the first roller 2.

[0081] In this embodiment, the first conveying mechanism 1 also includes a first motor, which is connected to at least one sprocket 12. Its main function is to provide power for the entire device. By driving the continuous rotation of the sprocket 12, it ensures that the chain 111 can circulate along a predetermined path. The chain 111 also interacts with the tensioning mechanism 4 to achieve precise tensioning control of the film 3.

[0082] In some embodiments, the conveyor belt 11 is a belt or a chain.

[0083] See also Figure 8 and Fig. 9 In the present embodiment, the first conveying mechanism 1 further comprises two housings 13 , the sprocket 12 can be hidden and disposed in the housings 13 to avoid being exposed to the outside, and the first motor can also be disposed in the housings 13 .

[0084] In this embodiment, the film tensioning device further includes a second conveying mechanism, which includes a second roller, on which a film 3 is disposed, and the second roller is located at one side of the first roller 2 .

[0085] The film 3 is firstly rolled onto the second roller of the second conveying mechanism. When the device is started, the film 3 is pulled forward by the tensioning mechanism 4, and the second roller rotates accordingly, so that the film 3 is spread out. It should be mentioned that before the film tensioning device is started, the film 3 needs to be manually clamped by the left and right tensioning mechanisms 4, and then the device can be used normally.

[0086] See also Figures 1 to 10 This embodiment also provides a pre-prepared food production line, including:

[0087] The film tensioning device is a film tensioning device as described in any one of the above embodiments, and has a structure as follows: Figures 1 to 9 as shown; and

[0088] The cutting device 5 is arranged between the two conveyor belts 11 in the film tensioning device, and is used to cut the film clamped by the second connecting plate 421 and the third connecting plate 412 in the film tensioning device and the container plate 6 heat-sealed with the film. Figures 8 to 10 shown.

[0089] The container plate 6 includes a plurality of accommodating grooves protruding downward and a connecting portion connecting the plurality of accommodating grooves together. Each accommodating groove contains a portion of pre-prepared dishes. After the pre-prepared dishes are loaded, a coating step is performed on the upper surface of the container plate 6, that is, the film is tightly attached to the opening of the accommodating groove by heating and pressure to form a sealing layer to ensure that the dishes are isolated from the external environment and prevent contamination and water evaporation. The cutting device 5 arranged between the two conveyor belts 11 is started to accurately cut the heat-sealed film and the container plate 6 according to the pre-set size and position, and divide them into individual pre-prepared dishes.

[0090] See also Figure 8 , Fig. 9 and Fig.10 In this embodiment, the cutting device 5 includes a first frame 51, a first cutting blade 52, a linear motion mechanism 53, a second frame 54, a second cutting blade 55, and a second motor 56. The linear motion mechanism 53 is arranged on the first frame 51, and the linear motion mechanism 53 is connected to the first cutting blade 52, and is used to drive the first cutting blade 52 to rise and fall. The direction of the first cutting blade 52 is along the width direction of the first conveying mechanism 1. The first cutting blade 52 and the second cutting blade 55 are arranged in sequence along the conveying direction of the first conveying mechanism 1. The second cutting blade 55 is arranged on the second frame 54 through a rotating shaft 57. The second cutting blade 55 rotates with the rotation of the rotating shaft 57, and the second motor 56 is connected to the rotating shaft 57 to drive the rotating shaft 57 and the second cutting blade 55 to rotate. The axial direction of the second cutting blade 55 is along the width direction of the conveying mechanism.

[0091] The first frame 51 has sufficient rigidity and stability to support and guide the movement of the first cutting blade 52. The first frame 51 can be across the top of the conveying mechanism. The linear motion mechanism 53 is responsible for providing and controlling the linear reciprocating motion of the cutting blade along the vertical direction (i.e., the cutting direction). The linear motion mechanism 53 can be a cylinder, a hydraulic cylinder, an electric cylinder, etc. In some embodiments, a mechanical arm can be used to replace the linear motion mechanism 53 to drive the first cutting knife.

[0092] The second frame 54 has sufficient rigidity and stability to support and guide the movement of the second cutting blade 55. The second frame 54 can span above the first conveying mechanism 1. The second motor 56, as a power source, can be connected to the rotating shaft 57 through a transmission mechanism (such as a belt, gear, chain 111, etc.) to drive the rotating shaft 57 to rotate, or the second motor 56 is directly connected to the rotating shaft 57 through a coupling, and the rotation of the rotating shaft 57 drives the second cutting blade 55 to rotate, forming a continuous cutting action. When the container plate 6 and the film pass through the rotating blade, the blade cuts with its sharp edge.

[0093] See also Fig.10 The first cutting blade 52 cuts along the width direction of the film, i.e., cross cutting. The second cutting blade 55 is located in front of the first cutting blade 52 along the conveying direction of the first conveying mechanism 1, and cuts along the width direction of the film, i.e., longitudinal cutting. Since the tensioning mechanism 4 clamps the film from both sides of the film, the cross cutting is performed first and then the longitudinal cutting is performed to avoid interference with the first conveying mechanism 1.

[0094] See also Fig.11 In this embodiment, the second cutting blade 55 is located at the first cutting blade 52 along the conveying direction of the first conveying mechanism 1 ( Fig.11 In front of the container plate 6 (as shown by the arrow), the first cutting blade 52 first cuts the container plate 6 horizontally to form a first cut mark 58, and the second cutting blade 55 then cuts the container plate 6 longitudinally to form a second cut mark 59. After the four side connecting parts of a single accommodating groove are cut, a prefabricated dish is formed. Fig.11 The container plate 6 is shown to be provided with six rows and three columns of receiving grooves, and correspondingly, two first cutting blades 52 and five second cutting blades 55 may be provided. Fig.11 shown.

[0095] In this embodiment, a base for supporting the container plate 6 is provided between the two conveyor belts. When the first conveying mechanism 1 clamps the film 3, the heat sealing machine can heat seal the film 3 and the container plate 6, and the base supports the container plate 6 during the heat sealing process.

[0096] It should be noted that although the above embodiments have been described in this article, this does not limit the scope of patent protection of the utility model. Therefore, based on the innovative concept of the utility model, changes and modifications to the embodiments described in this article, or equivalent structural or equivalent process changes made using the contents of the utility model specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields are all included in the scope of protection of the utility model patent.

Claims

1. A film tensioning device, characterized in that: The invention comprises a first conveying mechanism, a first roller and a plurality of tensioning mechanisms, wherein the first conveying mechanism comprises two conveyor belts closed end to end, the two conveyor belts are spaced apart and symmetrically arranged left and right, the first roller is arranged between the two conveyor belts, the axial direction of the first roller extends in the left and right direction, and a plurality of tensioning mechanisms are sequentially arranged in the length direction of each conveyor belt, the tensioning mechanism comprises a first frame, a second frame and an elastic member, the first frame and the second frame can be slidably sleeved up and down, the first frame is provided with a first connecting plate and a third connecting plate, the tensioning mechanism is arranged on the inner side of the conveyor belt through the second frame, the second frame is provided with a second connecting plate located between the first connecting plate and the third connecting plate, one end of the elastic member is arranged on the first connecting plate, the other end of the elastic member is arranged on the second connecting plate, the tensioning mechanism moves following the movement of the conveyor belt, and the first roller is located on the travel path of the first connecting plate; When the first connecting plate contacts the first roller, the first frame and the second frame move away from each other, the second connecting plate and the third connecting plate are separated to form an opening for clamping the film, and the elastic member is compressed. When the first connecting plate is separated from the first roller, the elastic force of the elastic member resets the second connecting plate to press the third connecting plate.

2. The film tensioning device according to claim 1, characterized in that: It also includes a vertical rod, one end of which is arranged on the side of the second connecting plate facing the first connecting plate, the first connecting plate is provided with a through hole for the vertical rod to extend out, and the vertical rod is covered with the elastic member, which is a spring.

3. The film tensioning device according to claim 1, characterized in that: A protrusion is extended from the first connecting plate on one side facing the first roller, and the protrusion is used to contact the first roller.

4. The film tensioning device according to claim 1, characterized in that: The second frame includes a back plate and two left and right side plates arranged on the inner side of the back plate, a sliding groove for the first frame to slide is formed between the left and right side plates, and the back plate is provided with the second connecting plate, and the second connecting plate extends into the first frame.

5. The film tensioning device according to claim 4, characterized in that: The first frame is a rectangular frame, and the left and right outer walls of the first frame are slidably connected to the slide groove. The first frame and the second frame are also provided with a limiting structure for preventing the first frame from escaping from the slide groove. The first connecting plate, the second connecting plate, and the third connecting plate are parallel to each other.

6. The film tensioning device according to claim 1, characterized in that: The conveyor belt is a chain.

7. The film tensioning device according to claim 6, characterized in that: The first conveying mechanism further comprises a plurality of sprockets, which are respectively engaged with the chains, and one of the sprockets is coaxially arranged with the first roller.

8. The film tensioning device according to claim 1, characterized in that: It also includes a second conveying mechanism, which includes a second roller, a film is disposed on the outer cover of the second roller, and the second roller is located on one side of the first roller.

9. A pre-prepared food production line, characterized in that: include: A film tensioning device, wherein the film tensioning device is the film tensioning device according to any one of claims 1 to 8; as well as A cutting device is arranged between the two conveyor belts in the film tensioning device, and is used for cutting the film clamped by the second connecting plate and the third connecting plate in the film tensioning device and the container plate heat-sealed with the film.

10. The pre-prepared food production line according to claim 9, characterized in that: The cutting device includes a first frame, a first cutting blade, a linear motion mechanism, a second frame, a second cutting blade and a second motor. The linear motion mechanism is arranged on the first frame, and the linear motion mechanism is connected to the first cutting blade and is used to drive the first cutting blade to rise and fall. The direction of the first cutting blade is along the width direction of the first conveying mechanism. The first cutting blade and the second cutting blade are arranged in sequence along the conveying direction of the first conveying mechanism. The second cutting blade is arranged on the second frame through a rotating shaft. The second cutting blade rotates following the rotation of the rotating shaft. The axial direction of the second cutting blade is along the width direction of the conveying mechanism. The rotating shaft is connected to the second motor.

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