Bag opening mechanism of vacuum sealer

Abstract

The utility model relates to a vacuum sealer bag opening mechanism which comprises a bottom plate, a first mounting plate is fixedly arranged in the middle of the side wall of the bottom plate, a first mounting base is fixedly connected to the top of the first mounting plate, and a suction nozzle is fixedly connected to the side wall of the side, away from the bottom plate, of the first mounting base. A pair of second mounting plates are symmetrically arranged on the two sides of the top of the bottom plate, a fixing rod is fixedly connected between the opposite side walls of the second mounting plates, a pair of first sliding grooves are horizontally and symmetrically formed in the side walls of the fixing rod, and bag opening assemblies are slidably connected to the sides, facing the suction nozzles, of the first sliding grooves; an expanding mechanism is arranged on the other side of the first sliding groove, the bag opening assembly comprises a first sliding seat, and a second sliding groove is horizontally formed in the side wall of the side, facing the suction nozzle, of the first sliding seat. And through the arrangement of a baffle, a second sliding seat and a spring, the position of the supporting plate can be automatically adjusted when the opening amplitude of the supporting plate is too large, and the packaging bag opening is prevented from being expanded and broken when being opened.

Description

Technical Field

[0001] This utility model relates to the field of packaging equipment technology, specifically to a bag-supporting mechanism for a vacuum sealing machine. Background Technology

[0002] Vacuum sealing machines are commonly used packaging equipment, widely applied in both household and commercial settings. They are primarily used for vacuum packaging food, pharmaceuticals, and other items to extend their shelf life and maintain freshness. Vacuum sealing machines utilize a vacuum pump to remove air from the packaging bag, creating a negative pressure environment that effectively inhibits oxidation and microbial growth, thus extending food preservation time. Some models also support vacuum inflation, allowing the introduction of gases such as nitrogen and carbon dioxide for pressure resistance, gas barrier properties, and freshness preservation. This is particularly suitable for packaging fragile or easily clumped foods. The barrier environment created by vacuum packaging prevents food from becoming damp, absorbing odors, or spoiling, while also avoiding secondary contamination caused by the exchange of contents. It also plays a crucial role in moisture-proofing and oxidation-proofing in the pharmaceutical and electronic device industries.

[0003] Vacuum sealing machines require a bag-supporting mechanism to open the bag opening during sealing. Existing vacuum sealing machines' bag-supporting mechanisms can easily cause the bag opening to burst when the opening is too large, affecting the vacuum sealing effect. Furthermore, the opening is not easy to adjust for different sizes of packaging bags, resulting in poor applicability. Utility Model Content

[0004] The purpose of this invention is to address the problem that the existing vacuum sealing machine's bag-supporting mechanism easily causes the packaging bag opening to burst and makes it difficult to adjust the opening range.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A bag-supporting mechanism for a vacuum sealing machine includes a base plate. A first mounting plate is fixedly disposed in the middle of the side wall of the base plate. A first mounting seat is fixedly connected to the top of the first mounting plate. A suction nozzle is fixedly connected to the side wall of the first mounting seat away from the base plate. A pair of second mounting plates are symmetrically disposed on both sides of the top of the base plate. A fixing rod is fixedly connected between the opposing side walls of the second mounting plates. A pair of first sliding grooves are horizontally symmetrically formed on the side walls of the fixing rods. A bag-supporting assembly is slidably connected to the side of the first sliding groove facing the suction nozzle. An expansion mechanism is disposed on the other side of the first sliding groove. The bag-supporting assembly includes a first sliding seat. A second sliding groove is horizontally formed on the side wall of the first sliding seat facing the suction nozzle. A second sliding seat is slidably connected to the outer side of the second sliding groove. A support plate is disposed on the side of the second sliding seat facing the suction nozzle. A baffle is fixedly connected to the opposing side wall of the first sliding seat. A spring is horizontally connected between the baffle and the side wall of the second sliding seat.

[0007] Furthermore, the expansion mechanism includes a third mounting plate, which is fixedly connected to the top of the base plate. A motor is fixedly connected to the side wall of the third mounting plate facing the suction nozzle. A lead screw is fixedly connected to the shaft of the motor. The other end of the lead screw is rotatably connected to the side wall of the fixed rod. The lead screw is perpendicular to the fixed rod.

[0008] Furthermore, a movable block is threadedly connected to the lead screw, the movable block is slidably connected to the base plate, a slider is slidably connected to the side of the first slide groove away from the suction nozzle, the slider passes through the first slide groove and is fixedly connected to the adjacent first sliding seat, and a pair of connecting rods are symmetrically hinged between the movable block and the pair of sliders.

[0009] Furthermore, the second sliding seat has a horizontally opening mounting groove on the side wall facing the suction nozzle, and a guide rod is vertically arranged inside the mounting groove. The end of the support plate is slidably sleeved on the outside of the guide rod. An adjusting bolt is vertically rotatably connected to the top of the second sliding seat. The adjusting bolt passes through the support plate and is threadedly connected to it.

[0010] Furthermore, the support plate is arranged in a "Z" shape, and the bottom of the support plate is at the same height as the suction nozzle.

[0011] Furthermore, a pair of third sliding grooves are symmetrically provided on the bottom of the base plate. The third sliding grooves are arranged parallel to the suction nozzle. A push plate is fixedly connected to the middle of the side wall of the base plate away from the suction nozzle. The side wall of the push plate away from the suction nozzle is fixedly connected to the piston rod of the flat-push cylinder.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. The vacuum sealing machine bag-supporting mechanism of this utility model, by being equipped with a baffle, a second sliding seat and a spring, can automatically adjust the position of the support plate when the opening of the support plate is too large, so as to prevent the packaging bag opening from bursting when it is opened.

[0014] 2. The bag-supporting mechanism of the vacuum sealing machine of this utility model is equipped with a lead screw, a movable block, a connecting rod, and a slider. The position of the movable block can be adjusted by rotating the lead screw, and the distance between the sliders can be adjusted by the connecting rod, thereby quickly adjusting the opening range of the support plate. It is suitable for packaging bags of different sizes and improves the applicability of the bag-supporting mechanism. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the bag-supporting mechanism of a vacuum sealing machine according to the present invention;

[0016] Figure 2 This is a schematic diagram of the expansion mechanism of the bag-supporting mechanism of a vacuum sealing machine according to the present invention;

[0017] Figure 3 This is a schematic diagram of the bottom structure of the bag-supporting mechanism of a vacuum sealing machine according to the present invention;

[0018] Figure 4 This is a front view structural diagram of a bag-supporting mechanism for a vacuum sealing machine according to the present invention;

[0019] Figure 5 This is an enlarged schematic diagram of point A of the bag-supporting mechanism of a vacuum sealing machine according to this utility model;

[0020] Figure 6 This is a side view of the bag-supporting mechanism of a vacuum sealing machine according to the present invention.

[0021] Figure 7 This is an enlarged schematic diagram of section B of the bag-supporting mechanism of a vacuum sealing machine according to this utility model;

[0022] Reference numerals: 1. Base plate; 2. First mounting plate; 3. First mounting seat; 4. Suction nozzle; 5. Third mounting plate; 6. Motor; 7. Lead screw; 8. Second mounting plate; 9. Fixed rod; 10. Movable block; 11. First slide groove; 12. Slider; 13. Connecting rod; 14. Bag support assembly; 141. First sliding seat; 142. Second sliding seat; 143. Baffle; 144. Spring; 145. Second slide groove; 146. Support plate; 147. Mounting groove; 148. Guide rod; 149. Adjusting bolt; 15. Third slide groove; 16. Push plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0024] refer to Figure 1The vacuum sealing machine bag-supporting mechanism of this embodiment includes a base plate 1. A first mounting plate 2 is fixedly disposed in the middle of the side wall of the base plate 1. A first mounting seat 3 is fixedly connected to the top of the first mounting plate 2. A suction nozzle 4 is fixedly connected to the side wall of the first mounting seat 3 away from the base plate 1 for vacuuming the inside of the packaging bag. A pair of second mounting plates 8 are symmetrically disposed on both sides of the top of the base plate 1. A fixing rod 9 is fixedly connected between the opposing side walls of the second mounting plates 8. A pair of first sliding grooves 11 are horizontally symmetrically opened on the side wall of the fixing rod 9. A bag-supporting assembly 14 is slidably connected to the side of the first sliding groove 11 facing the suction nozzle 4. The first slide 11 is used to support the packaging bag. An expansion mechanism is provided on the other side of the first slide 11 to adjust the spacing between the bag supporting components 14. The bag supporting component 14 includes a first sliding seat 141. A second slide 145 is horizontally opened on the side wall of the first sliding seat 141 facing the suction nozzle 4. A second sliding seat 142 is slidably connected to the outside of the second slide 145. A support plate 146 is provided on the side of the second sliding seat 142 facing the suction nozzle 4. A baffle 143 is fixedly connected to the opposite side wall of the first sliding seat 141. A spring 144 is horizontally connected between the baffle 143 and the side wall of the second sliding seat 142. When the bag is opened, the initial position of the support plate 146 is close to the suction nozzle 4. The bag opening is fitted onto the pair of support plates 146 and the suction nozzle 4, so that the support plates 146 and the suction nozzle 4 are partially located inside the bag opening. Then, the bag opening assembly 14 is driven by the expansion mechanism to move along the first slide groove 11 to both sides of the suction nozzle 4, so that the support plate 146 opens the bag opening during the movement. When the opening of the support plate 146 is greater than the width of the bag opening, the edge of the bag exerts a thrust in the opposite direction on the support plate 146. At this time, the support plate 146 and the second sliding seat 142 stop moving, and the second sliding seat 142 slides relative to the first sliding seat 141, so that the spring 144 is compressed and exerts a thrust on the second sliding seat 142. Thus, the spring 144 elastically opens the support plate 146 and the bag, preventing the bag from bursting due to excessive opening of the support plate 146.

[0025] The expansion mechanism includes a third mounting plate 5, which is fixedly connected to the top of the base plate 1. A motor 6 is fixedly connected to the side wall of the third mounting plate 5 facing the nozzle 4. A lead screw 7 is fixedly connected to the shaft of the motor 6. The other end of the lead screw 7 is rotatably connected to the side wall of the fixed rod 9. The lead screw 7 is perpendicular to the fixed rod 9. A movable block 10 is threadedly connected to the lead screw 7. The movable block 10 is slidably connected to the base plate 1. A slider 12 is slidably connected to the side of the first slide groove 11 away from the nozzle 4. The slider 12 passes through the first slide groove 11 and is fixedly connected to the adjacent first sliding seat 141. A pair of connecting rods 13 are symmetrically hinged between the movable block 10 and the pair of sliders 12. When the support plate 146 opens, the motor 6 drives the lead screw 7 to rotate, causing the movable block 10 connected to the external thread of the lead screw 7 to move towards the fixed rod 9. When the movable block 10 moves, it drives the connecting rods 13 hinged on both sides to open synchronously, causing the slider 12 hinged at the other end of the connecting rod 13 to move away from the suction nozzle 4 along the first slide groove 11, thereby driving the bag support assembly 14 to start moving towards each other. By adjusting the number of rotations of the lead screw 7, the opening amplitude of the bag support assembly 14 can be easily adjusted, effectively improving the applicability of the bag support mechanism of the vacuum sealing machine.

[0026] The second sliding seat 142 has a horizontally opening mounting groove 147 on its side wall facing the suction nozzle 4. A guide rod 148 is vertically arranged inside the mounting groove 147. The end of the support plate 146 is slidably sleeved on the outside of the guide rod 148. An adjusting bolt 149 is vertically rotatably connected to the top of the second sliding seat 142. The adjusting bolt 149 passes through the support plate 146 and is threadedly connected to it. The support plate 146 is arranged in a "Z" shape, and the bottom of the support plate 146 is at the same height as the suction nozzle 4. To accommodate different overall thicknesses of the packaging bag after it is filled with material, rotating the adjusting bolt 149 can drive the threaded support plate 146 to move along the guide rod 148 inside the mounting groove 147, thereby adjusting the installation position of the support plate 146 so that the bottom of the support plate 146 is always in the middle of the bag opening, further improving the applicability of the bag supporting mechanism of the vacuum sealing machine.

[0027] A pair of third grooves 15 are symmetrically provided on the bottom of the base plate 1. The third grooves 15 are arranged parallel to the suction nozzle 4. A push plate 16 is fixedly connected to the middle of the side wall of the base plate 1 away from the suction nozzle 4. The side wall of the push plate 16 away from the suction nozzle 4 is fixedly connected to the piston rod of the horizontal push cylinder. After the bag is stretched, the inside of the packaging bag is vacuumed through the suction nozzle 4. Then, the horizontal push cylinder drives the push plate 16 and the base plate 1 to move away from the packaging bag, so that the suction nozzle 4 and the support plate 146 are pulled away from the packaging bag, and the packaging bag is sealed.

[0028] Working principle: When opening the bag, the initial position of the support plate 146 is close to the suction nozzle 4. The bag opening is fitted onto the pair of support plates 146 and the suction nozzle 4, so that the support plates 146 and the suction nozzle 4 are partially located inside the bag opening. Then, the motor 6 drives the lead screw 7 to rotate, causing the movable block 10 connected to the external thread of the lead screw 7 to move towards the fixed rod 9. When the movable block 10 moves, it drives the connecting rods 13 hinged on both sides to open synchronously, causing the slider 12 hinged at the other end of the connecting rod 13 to move away from the suction nozzle 4 along the first sliding groove 11, thereby causing the bag opening assembly 14 to start moving towards each other. By adjusting the number of rotations of the lead screw 7, the opening range of the bag opening assembly 14 can be easily adjusted. During the movement, the support plate 146 opens the bag opening. When the opening range of the support plate 146 is greater than the width of the bag opening, the edge of the bag generates a thrust in the opposite direction on the support plate 146. At this time, the support plate 146 and the second sliding seat 142 stop moving. The second sliding seat 142 slides relative to the first sliding seat 141, causing the spring 144 to compress and generate a thrust on the second sliding seat 142. This, in turn, elastically opens the support plate 146 and the packaging bag through the spring 144, preventing the packaging bag from bursting due to excessive opening of the support plate 146. To accommodate different overall thicknesses of the packaging bag after it has been filled with materials, rotating the adjusting bolt 149 causes the threaded support plate 146 to move along the guide rod 148 inside the mounting groove 147, thus adjusting the installation position of the support plate 146. This ensures that the bottom of the support plate 146 is always in the middle of the bag opening, preventing a mismatch between the height of the support plate 146 and the thickness of the packaging bag from affecting the sealing effect. After the bag is opened, the inside of the packaging bag is vacuumed using the suction nozzle 4. Then, the pusher cylinder drives the pusher plate 16 and the bottom plate 1 to move away from the packaging bag, causing the suction nozzle 4 and the support plate 146 to be pulled away from the packaging bag, thus sealing the bag.

[0029] The above embodiments are used to further illustrate the present invention, but do not limit the present invention to these specific embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be understood as being within the protection scope of the present invention.

Claims

1. A bag-supporting mechanism for a vacuum sealing machine, characterized in that: The device includes a base plate (1), a first mounting plate (2) fixedly disposed in the middle of the side wall of the base plate (1), a first mounting seat (3) fixedly connected to the top of the first mounting plate (2), a suction nozzle (4) fixedly connected to the side wall of the first mounting seat (3) away from the base plate (1), a pair of second mounting plates (8) symmetrically disposed on both sides of the top of the base plate (1), a fixing rod (9) fixedly connected between the opposing side walls of the second mounting plates (8), a pair of first sliding grooves (11) symmetrically opened horizontally on the side wall of the fixing rod (9), and a bag support assembly (14) slidably connected to the side of the first sliding groove (11) facing the suction nozzle (4). An expansion mechanism is provided on the other side of the first slide groove (11). The bag support assembly (14) includes a first sliding seat (141). A second slide groove (145) is horizontally opened on the side wall of the first sliding seat (141) facing the suction nozzle (4). A second sliding seat (142) is slidably connected to the outside of the second slide groove (145). A support plate (146) is provided on the side of the second sliding seat (142) facing the suction nozzle (4). A baffle (143) is fixedly connected to the opposite side wall of the first sliding seat (141). A spring (144) is horizontally connected between the baffle (143) and the side wall of the second sliding seat (142).

2. The bag-supporting mechanism of a vacuum sealing machine according to claim 1, characterized in that: The expansion mechanism includes a third mounting plate (5), which is fixedly connected to the top of the base plate (1). A motor (6) is fixedly connected to the side wall of the third mounting plate (5) facing the suction nozzle (4). A lead screw (7) is fixedly connected to the shaft of the motor (6). The other end of the lead screw (7) is rotatably connected to the side wall of the fixed rod (9). The lead screw (7) is perpendicular to the fixed rod (9).

3. The bag-supporting mechanism of a vacuum sealing machine according to claim 2, characterized in that: The lead screw (7) is threaded with a movable block (10), which is slidably connected to the base plate (1). A slider (12) is slidably connected to the side of the first slide groove (11) away from the suction nozzle (4). The slider (12) passes through the first slide groove (11) and is fixedly connected to the adjacent first sliding seat (141). A pair of connecting rods (13) are symmetrically hinged between the movable block (10) and the pair of sliders (12).

4. The bag-supporting mechanism of a vacuum sealing machine according to claim 1, characterized in that: The second sliding seat (142) has a horizontally opened mounting groove (147) on the side wall facing the suction nozzle (4). A guide rod (148) is vertically arranged on the inner side of the mounting groove (147). The end of the support plate (146) is slidably sleeved on the outside of the guide rod (148). An adjusting bolt (149) is vertically rotatably connected to the top of the second sliding seat (142). The adjusting bolt (149) passes through the support plate (146) and is threadedly connected to it.

5. The bag-supporting mechanism of a vacuum sealing machine according to claim 1, characterized in that: The support plate (146) is arranged in a "Z" shape, and the bottom of the support plate (146) is at the same height as the suction nozzle (4).

6. The bag-supporting mechanism of a vacuum sealing machine according to claim 1, characterized in that: A pair of third sliding grooves (15) are symmetrically provided at the bottom of the base plate (1). The third sliding grooves (15) are arranged parallel to the suction nozzle (4). A push plate (16) is fixedly connected to the middle of the side wall of the base plate (1) away from the suction nozzle (4). The side wall of the push plate (16) away from the suction nozzle (4) is fixedly connected to the piston rod of the flat push cylinder.

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