Membrane sealing mechanism for meal box cover

Abstract

The utility model relates to the technical field of lunch box cover packaging, in particular to a lunch box cover film sealing mechanism which comprises a machine frame. The rack is provided with a feeding conveying belt and a discharging conveying belt. A gap is formed between the feeding conveying belt and the discharging conveying belt; the rack is provided with a top heat sealing assembly. A side heat sealing assembly is arranged at the gap of the rack; the top heat-sealing assembly comprises a heat-sealing supporting shaft, a top heat-sealing base, a first heat-sealing wheel and a second heat-sealing wheel, wherein the first heat-sealing wheel and the second heat-sealing wheel are rotationally arranged on the top heat-sealing base. A top heat sealing linkage assembly is arranged between the first heat sealing wheel and the second heat sealing wheel. By arranging the abutting spring, a packaging film on the top of a meal box cover can abut against the position between the first heat sealing wheel and the second heat sealing wheel, and therefore the sealing effect of the top of the packaging film is guaranteed; and in addition, the side heat sealing assembly is arranged in the gap, the side heat sealing assembly can be prevented from making contact with the feeding conveying belt, and therefore the sealing effect of the side of the packaging film can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of lunch box and meal cover packaging, in particular to a film sealing mechanism for a lunch box and meal cover. Background Art

[0002] Disposable lunch boxes and lids are widely used in the food service industry due to their convenience. To improve production efficiency and reduce costs, manufacturers often use automated production lines for large-scale production. On these lines, the boxes and lids are sealed with packaging film after injection molding.

[0003] During the packaging process, in order to ensure the sealing of the packaging film, the top, front and back of the packaging film need to be heat-sealed. The currently commonly used heat-sealing method has the following problems:

[0004] First, when heat-sealing the top of the packaging film, it is usually passed between two heat-sealing wheels. However, since the position of the two heat-sealing wheels cannot be adjusted, it is difficult to ensure a good sealing effect for packaging films of different thicknesses.

[0005] Second, when sealing the front and back ends of the packaging film, two heat-sealing plates are usually used to move back and forth linearly. However, since the two heat-sealing plates heat-seal the products directly on the conveyor belt, interference occurs between the heat-sealing plates and the conveyor belt, thus affecting the sealing effect. Utility Model Content

[0006] The purpose of the utility model is to provide a film sealing mechanism for a lunch box and a lid in view of the above-mentioned deficiencies in the prior art.

[0007] The purpose of the utility model is achieved through the following technical solutions: a lunch box lid sealing mechanism, comprising a frame; the frame is provided with a feed conveyor belt and a discharge conveyor belt; a gap is provided between the feed conveyor belt and the discharge conveyor belt; the frame is provided with a top heat sealing assembly on the top of the feed conveyor belt; the frame is provided with a side heat sealing assembly at the gap;

[0008] The top heat sealing assembly includes a heat sealing support shaft, a top heat sealing seat provided on the heat sealing support shaft, and a first heat sealing wheel and a second heat sealing wheel both rotatably provided on the top heat sealing seat; a top heat sealing linkage assembly is provided between the first heat sealing wheel and the second heat sealing wheel;

[0009] A resistance slider is provided in the top heat sealing seat for sliding movement; the second heat sealing wheel is provided on the resistance slider; a resistance spring is provided between the end of the top heat sealing seat away from the first heat sealing wheel and the resistance slider; the resistance spring is used to push the resistance slider so that the first heat sealing wheel and the second heat sealing wheel abut against each other.

[0010] The utility model is further configured such that the top heat sealing seat is provided with a first heat sealing connecting shaft and a second heat sealing connecting shaft which are rotatable along the height direction; the first heat sealing connecting shaft and the second heat sealing connecting shaft are respectively connected to the first heat sealing wheel and the second heat sealing wheel; the first heat sealing connecting shaft is rotatably provided against the slider.

[0011] The utility model is further configured such that the top heat sealing linkage assembly includes a heat sealing drive shaft rotatably arranged in the heat sealing support shaft, a first steering gear arranged on the heat sealing drive shaft, a second steering gear sleeved on the first heat sealing connecting shaft, a first linkage gear sleeved on the first heat sealing connecting shaft, and a second linkage gear sleeved on the second heat sealing connecting shaft;

[0012] The first linkage gear is meshed with the second linkage gear; the first steering gear is meshed with the second steering gear.

[0013] The utility model is further configured such that a baffle is provided between the first heat sealing connecting shaft and the second heat sealing connecting shaft; the top heat sealing seat is provided with a rest slide rail; the rest slider is slidably arranged on the rest slide rail; and the rest spring is arranged between the end of the top heat sealing seat away from the baffle and the rest slider.

[0014] The utility model is further configured such that the top heat sealing assembly also includes a connecting seat, a guide support shaft arranged on the connecting seat, a guide seat arranged on the guide support shaft, and a first guide wheel and a second guide wheel both rotatably arranged on the guide seat; the heat sealing support shaft is arranged on the connecting seat.

[0015] The present invention is further configured such that a guide drive shaft is provided for rotation in the guide support shaft; the guide drive shaft is provided with a third steering gear; the first guide wheel is coaxially driven with a fourth steering gear meshing with the third steering gear.

[0016] The utility model is further configured as follows: the frame is provided with a lifting slide rail along the height direction; the connecting seat is slidably arranged on the lifting slide rail; the frame is provided with an adjustment seat; the adjustment seat is threadedly connected to an adjustment screw arranged along the height direction; the adjustment screw is connected to the connecting seat; the adjustment screw is provided with a fifth steering gear; the fifth steering gear is engaged with a sixth steering gear; and the sixth steering gear is connected to an adjustment rotating rod.

[0017] The utility model is further configured as follows: the side heat sealing assembly includes a first side heat sealing seat and a second side heat sealing seat arranged opposite to each other in a gap; the frame is provided with a heat sealing slide rail along the longitudinal direction; the first side heat sealing seat and the second side heat sealing seat are respectively slidably arranged on the heat sealing slide rail; the first side heat sealing seat is provided with a first heat sealing plate; the second side heat sealing seat is provided with a second heat sealing plate.

[0018] The utility model is further configured as follows: the frame is provided with a heat sealing motor; a crank-connecting rod assembly is provided between the heat sealing motor and the first side heat sealing seat; the heat sealing motor drives the first side heat sealing seat to move back and forth in a straight line along the heat sealing slide rail through the crank-connecting rod assembly; a synchronous reverse linkage assembly is provided between the first side heat sealing seat and the second side heat sealing seat.

[0019] The utility model is further configured such that the feed conveyor belt and the discharge conveyor belt are both arranged in the transverse direction; the frame is provided with a fixed plate; the fixed plate is provided with a sliding plate that slides in the transverse direction; the discharge conveyor belt is provided on the sliding plate; the fixed plate is provided with a cylinder; and the output end of the cylinder is connected to the sliding plate.

[0020] The beneficial effects of the present invention are as follows: the present invention arranges a supporting spring so that the packaging film on the top of the lunch box lid can be pressed tightly between the first heat-sealing wheel and the second heat-sealing wheel, thereby ensuring the sealing effect of the top of the packaging film; in addition, the side heat-sealing component is arranged in the gap, which can prevent the side heat-sealing component from contacting the feed conveyor belt, thereby ensuring the sealing effect of the side of the packaging film. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the utility model. A person skilled in the art can obtain other drawings based on the following drawings without making any creative effort.

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 It is a structural schematic diagram of the utility model from another perspective;

[0024] Figure 3 This is the internal structure diagram of the heat sealing support shaft and the top heat sealing seat of the utility model;

[0025] Figure 4 This is the internal structure diagram of the guide support shaft and the guide heat sealing seat of the utility model;

[0026] Figure 5 It is a structural schematic diagram of the side heat sealing assembly of the utility model;

[0027] Among them: 1. Frame; 11. Feed conveyor; 12. Gap; 2. Fixed plate; 21. Sliding plate; 22. Cylinder; 23. Discharge conveyor; 3. Heat sealing support shaft; 31. Heat sealing drive shaft; 32. First steering gear; 33. Second steering gear; 34. First linkage gear; 35. Second linkage gear; 4. Top heat sealing seat; 41. First heat sealing wheel; 42. Second heat sealing wheel; 43. Abutting slider; 44. Abutting spring; 45. First heat sealing connecting shaft; 46. Second heat sealing connecting shaft; 47. Baffle; 48. Abutting slide rail; 5. Guide support Support shaft; 51. Guide drive shaft; 52. Third steering gear; 6. Guide seat; 61. First guide wheel; 62. Second guide wheel; 63. Fourth steering gear; 7. Connecting seat; 71. Lifting slide rail; 72. Adjusting seat; 73. Adjusting screw; 74. Fifth steering gear; 75. Sixth steering gear; 76. Adjusting rotating rod; 81. First side heat sealing seat; 82. Second side heat sealing seat; 83. Heat sealing slide rail; 84. First heat sealing plate; 85. Second heat sealing plate; 91. Heat sealing motor; 92. Crank connecting rod assembly; 93. Synchronous reverse linkage assembly. DETAILED DESCRIPTION

[0028] The present invention will be further described with reference to the following embodiments.

[0029] Depend on Figures 1 to 5 It can be seen that the lunch box and lid sealing mechanism described in this embodiment includes a frame 1; the frame 1 is provided with a feed conveyor belt 11 and a discharge conveyor belt 23; a gap 12 is provided between the feed conveyor belt 11 and the discharge conveyor belt 23; the frame 1 is provided with a top heat sealing component on the top of the feed conveyor belt 11; the frame 1 is provided with a side heat sealing component at the gap 12;

[0030] The top heat sealing assembly includes a heat sealing support shaft 3, a top heat sealing seat 4 provided on the heat sealing support shaft 3, and a first heat sealing wheel 41 and a second heat sealing wheel 42 both rotatably provided on the top heat sealing seat 4; a top heat sealing linkage assembly is provided between the first heat sealing wheel 41 and the second heat sealing wheel 42; wherein the first heat sealing wheel 41 and the second heat sealing wheel 42 are both provided with heating elements, which can quickly heat the packaging film;

[0031] A rest slider 43 is provided for sliding inside the top heat sealing seat 4; the second heat sealing wheel 42 is provided on the rest slider 43; a rest spring 44 is provided between the end of the top heat sealing seat 4 away from the first heat sealing wheel 41 and the rest slider 43; the rest spring 44 is used to push the rest slider 43 so that the first heat sealing wheel 41 and the second heat sealing wheel 42 are in abutment with each other.

[0032] Specifically, in the lunch box and lid sealing mechanism described in this embodiment, when the lunch box or the lunch lid moves to the top heat sealing assembly via the feed conveyor 11, the packaging film on the top of the lunch box or the lunch lid moves between the first heat sealing wheel 41 and the second heat sealing wheel 42. Due to the action of the abutting spring 44, the packaging film on the top of the lunch box or the lunch lid can be pressed tightly between the first heat sealing wheel 41 and the second heat sealing wheel 42, thereby ensuring the sealing effect of the top of the packaging film. In addition, since the first heat sealing wheel 41 and the second heat sealing wheel 42 can move relative to each other, the top heat sealing assembly can adapt to lunch boxes or lunch lids of different sizes.

[0033] When the front end or rear end of the lunch box or lunch cover moves to the gap 12, the side heat sealing component heat seals the packaging film at the front end of the lunch box or lunch cover and the packaging film at the rear end of the lunch box or lunch cover; since the side heat sealing component is arranged at the gap 12 between the feed conveyor belt 11 and the discharge conveyor belt 23, it can prevent the side heat sealing component from contacting the feed conveyor belt 11, thereby ensuring the sealing effect.

[0034] In the lunch box and lid sealing mechanism described in this embodiment, the top heat sealing seat 4 is provided with a first heat sealing connecting shaft 45 and a second heat sealing connecting shaft 46 that rotate along the height direction; the first heat sealing connecting shaft 45 and the second heat sealing connecting shaft 46 are respectively connected to the first heat sealing wheel 41 and the second heat sealing wheel 42; the first heat sealing connecting shaft 45 is rotatably arranged to abut against the slider 43.

[0035] Specifically, the film sealing mechanism for the lunch box and the lunch cover of this embodiment provides a first heat-sealing connecting shaft 45 and a second heat-sealing connecting shaft 46 , making the overall structure more stable and reliable.

[0036] The lunch box and lid sealing mechanism described in this embodiment comprises a top heat sealing linkage assembly including a heat sealing drive shaft 31 rotatably arranged in the heat sealing support shaft 3, a first steering gear 32 arranged on the heat sealing drive shaft 31, a second steering gear 33 sleeved on the first heat sealing connecting shaft 45, a first linkage gear 34 sleeved on the first heat sealing connecting shaft 45, and a second linkage gear 35 sleeved on the second heat sealing connecting shaft 46; the first linkage gear 34 is engaged with the second linkage gear 35; the first steering gear 32 is engaged with the second steering gear 33.

[0037] Specifically, the heat sealing drive shaft 31 is driven to rotate by an external driving member, thereby causing the first steering gear 32 to drive the second steering gear 33 to rotate, causing the first heat sealing connecting shaft 45 to rotate. The first heat sealing connecting shaft 45 drives the second heat sealing connecting shaft 46 to rotate synchronously through the first linkage gear 34 and the second linkage gear 35, thereby causing the first heat sealing wheel 41 and the second heat sealing wheel 42 to rotate synchronously, thereby heat-sealing the top of the packaging film;

[0038] Among them, since the teeth of the first linkage gear 34 and the second linkage gear 35 are longer and the thickness of the packaging film is smaller, the displacement of the slider 43 is smaller, and the first linkage gear 34 and the second linkage gear 35 are always kept in meshing state.

[0039] In the film sealing mechanism for a lunch box and lid described in this embodiment, a baffle 47 is provided between the first heat-sealing connecting shaft 45 and the second heat-sealing connecting shaft 46; the top heat-sealing seat 4 is provided with a support rail 48; the support slider 43 slides on the support rail 48; and the support spring 44 is provided between the end of the top heat-sealing seat 4 away from the baffle 47 and the support slider 43. These arrangements make the overall structure more stable and reliable.

[0040] In the film-sealing mechanism for a lunch box and lid described in this embodiment, the top heat-sealing assembly further includes a connecting seat 7, a guide support shaft 5 disposed on the connecting seat 7, a guide seat 6 disposed on the guide support shaft 5, and a first guide wheel 61 and a second guide wheel 62, both rotatably disposed on the guide seat 6; the heat-sealing support shaft 3 is disposed on the connecting seat 7. In the film-sealing mechanism for a lunch box and lid described in this embodiment, a guide drive shaft 51 is rotatably disposed within the guide support shaft 5; the guide drive shaft 51 is provided with a third steering gear 52; and the first guide wheel 61 is coaxially provided with a fourth steering gear 63 that meshes with the third steering gear 52.

[0041] Specifically, the external motor drives the guide drive shaft 51 to rotate, so that the third steering gear 52 drives the fourth steering gear 63 to rotate, so that the first guide wheel 61 rotates; through the cooperation of the first guide wheel 61 and the second guide wheel 62, the movement of the packaging film can be guided.

[0042] The lunch box and meal lid sealing mechanism described in this embodiment has a frame 1 provided with a lifting slide rail 71 along the height direction; the connecting seat 7 is slidably arranged on the lifting slide rail 71; the frame 1 is provided with an adjustment seat 72; the adjustment seat 72 is threadedly connected to an adjustment screw 73 arranged along the height direction; the adjustment screw 73 is connected to the connecting seat 7; the adjustment screw 73 is provided with a fifth steering gear 74; the fifth steering gear 74 is engaged with a sixth steering gear 75; the sixth steering gear 75 is connected to an adjustment rotating rod 76.

[0043] Specifically, through the above arrangement, this embodiment can adjust the rotating rod 76 by rotating so that the connecting seat 7 can be raised or lowered, thereby matching lunch boxes and lunch covers stacked at different heights.

[0044] The lunch box and lid sealing mechanism described in this embodiment comprises a side heat sealing assembly comprising a first side heat sealing seat 81 and a second side heat sealing seat 82 which are arranged opposite to each other in a gap 12; the frame 1 is provided with a heat sealing slide rail 83 along the longitudinal direction; the first side heat sealing seat 81 and the second side heat sealing seat 82 are respectively slidably arranged on the heat sealing slide rail 83; the first side heat sealing seat 81 is provided with a first heat sealing plate 84; the second side heat sealing seat 82 is provided with a second heat sealing plate 85; wherein the first heat sealing plate 84 and the second heat sealing plate 85 are both provided with heating elements, which can quickly heat the packaging film. The lunch box and lid sealing mechanism described in this embodiment comprises a frame 1 provided with a heat sealing motor 91; a crank-connecting rod assembly 92 is provided between the heat sealing motor 91 and the first side heat sealing seat 81; the heat sealing motor 91 drives the first side heat sealing seat 81 to move back and forth in a straight line along the heat sealing slide rail 83 through the crank-connecting rod assembly 92; a synchronous reverse linkage assembly 93 is provided between the first side heat sealing seat 81 and the second side heat sealing seat 82.

[0045] Specifically, when the front end or the rear end of the lunch box or the lunch cover moves to the gap 12, the heat sealing motor 91 drives the first side heat sealing seat 81 to move along the heat sealing slide rail 83 through the crank-connecting rod assembly 92, and the first side heat sealing seat 81 drives the second side heat sealing seat 82 to move in the opposite direction under the action of the synchronous reverse linkage assembly 93, so that the first heat sealing plate 84 and the second heat sealing plate 85 are close to each other, and the packaging film at the front end of the lunch box or the lunch cover and the packaging film at the rear end of the lunch box or the lunch cover are heat-sealed; since the first heat sealing plate 84 and the second heat sealing plate 85 are both arranged at the gap 12 between the feed conveyor belt 11 and the discharge conveyor belt 23, the first heat sealing plate 84 and the second heat sealing plate 85 can respectively contact the feed conveyor belt 11, thereby ensuring the sealing effect.

[0046] The lunch box and lid sealing mechanism described in this embodiment has the feed conveyor belt 11 and the discharge conveyor belt 23 both arranged in the transverse direction; the frame 1 is provided with a fixed plate 2; the fixed plate 2 is provided with a sliding plate 21 that slides in the transverse direction; the discharge conveyor belt 23 is provided on the sliding plate 21; the fixed plate 2 is provided with a cylinder 22; the output end of the cylinder 22 is connected to the sliding plate 21.

[0047] Specifically, through the above arrangement, the distance between the feed conveyor belt 11 and the discharge conveyor belt 23 can be adjusted, thereby adjusting the width of the gap 12 to accommodate lunch boxes or lunch lids of different sizes.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A film sealing mechanism for a lunch box lid, characterized by: The machine comprises a frame; the frame is provided with a feed conveyor belt and a discharge conveyor belt; a gap is provided between the feed conveyor belt and the discharge conveyor belt; the frame is provided with a top heat sealing assembly on the top of the feed conveyor belt; the frame is provided with a side heat sealing assembly at the gap; The top heat sealing assembly includes a heat sealing support shaft, a top heat sealing seat provided on the heat sealing support shaft, and a first heat sealing wheel and a second heat sealing wheel both rotatably provided on the top heat sealing seat; a top heat sealing linkage assembly is provided between the first heat sealing wheel and the second heat sealing wheel; A resistance slider is provided in the top heat sealing seat for sliding movement; the second heat sealing wheel is provided on the resistance slider; a resistance spring is provided between the end of the top heat sealing seat away from the first heat sealing wheel and the resistance slider; the resistance spring is used to push the resistance slider so that the first heat sealing wheel and the second heat sealing wheel abut against each other.

2. The film sealing mechanism for a lunch box lid according to claim 1, characterized in that: The top heat sealing seat is rotatable along the height direction and is provided with a first heat sealing connecting shaft and a second heat sealing connecting shaft; the first heat sealing connecting shaft and the second heat sealing connecting shaft are respectively connected to the first heat sealing wheel and the second heat sealing wheel; the first heat sealing connecting shaft is rotatably arranged to abut against the slider.

3. The film sealing mechanism for a lunch box lid according to claim 2, characterized in that: The top heat sealing linkage assembly includes a heat sealing drive shaft rotatably arranged in the heat sealing support shaft, a first steering gear arranged on the heat sealing drive shaft, a second steering gear sleeved on the first heat sealing connecting shaft, a first linkage gear sleeved on the first heat sealing connecting shaft, and a second linkage gear sleeved on the second heat sealing connecting shaft; The first linkage gear is meshed with the second linkage gear; the first steering gear is meshed with the second steering gear.

4. The film sealing mechanism for a lunch box lid according to claim 2, characterized in that: A baffle is provided between the first heat sealing connecting shaft and the second heat sealing connecting shaft; the top heat sealing seat is provided with a rest slide rail; the rest slide block is slidably arranged on the rest slide rail; the rest spring is arranged between the end of the top heat sealing seat away from the baffle and the rest slide block.

5. The film sealing mechanism for a lunch box lid according to claim 1, characterized in that: The top heat sealing assembly also includes a connecting seat, a guide support shaft arranged on the connecting seat, a guide seat arranged on the guide support shaft, and a first guide wheel and a second guide wheel both rotatably arranged on the guide seat; the heat sealing support shaft is arranged on the connecting seat.

6. The film sealing mechanism for a lunch box lid according to claim 5, characterized in that: A guide drive shaft is provided for rotation in the guide support shaft; a third steering gear is provided on the guide drive shaft; and a fourth steering gear meshing with the third steering gear is provided on the first guide wheel for coaxial transmission.

7. The film sealing mechanism for a lunch box lid according to claim 5, characterized in that: The frame is provided with a lifting slide rail along the height direction; the connecting seat is slidably provided on the lifting slide rail; the frame is provided with an adjustment seat; the adjustment seat is threadedly connected to an adjustment screw provided along the height direction; the adjustment screw is connected to the connecting seat; the adjustment screw is provided with a fifth steering gear; the fifth steering gear is engaged with a sixth steering gear; the sixth steering gear is connected to an adjustment rotating rod.

8. The film sealing mechanism for a lunch box lid according to claim 1, characterized in that: The side heat sealing assembly includes a first side heat sealing seat and a second side heat sealing seat arranged opposite to each other in a gap; the frame is provided with a heat sealing slide rail along the longitudinal direction; the first side heat sealing seat and the second side heat sealing seat are respectively slidably arranged on the heat sealing slide rail; the first side heat sealing seat is provided with a first heat sealing plate; the second side heat sealing seat is provided with a second heat sealing plate.

9. The film sealing mechanism for a lunch box lid according to claim 8, characterized in that: The frame is provided with a heat sealing motor; a crank-connecting rod assembly is provided between the heat sealing motor and the first side heat sealing seat; the heat sealing motor drives the first side heat sealing seat to move back and forth in a straight line along the heat sealing slide rail through the crank-connecting rod assembly; a synchronous reverse linkage assembly is provided between the first side heat sealing seat and the second side heat sealing seat.

10. The film sealing mechanism for a lunch box lid according to claim 1, characterized in that: The feed conveyor belt and the discharge conveyor belt are both arranged in the transverse direction; the frame is provided with a fixed plate; the fixed plate is provided with a sliding plate that slides in the transverse direction; the discharge conveyor belt is arranged on the sliding plate; the fixed plate is provided with a cylinder; the output end of the cylinder is connected to the sliding plate.

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