Packaging bag opening machine

Abstract

The utility model relates to negative pressure equipment, and particularly discloses a packaging bag opening machine which comprises a pair of oppositely arranged negative pressure mechanisms and a pair of driving mechanisms. One driving mechanism is connected with one negative pressure mechanism; the pair of driving mechanisms is used for driving the pair of negative pressure mechanisms to approach / leave; the negative pressure mechanism comprises a horizontally arranged negative pressure plate, a negative pressure cavity formed in the negative pressure plate, first negative pressure holes formed in the sides, close to each other, of the pair of negative pressure plates, a negative pressure pipe communicated with the negative pressure cavity, and a negative pressure machine connected with the negative pressure pipe; and the first negative pressure hole is communicated with the negative pressure cavity. According to the packaging bag opening machine, the packaging bag can be efficiently opened, and the packaging bag can be effectively protected.

Description

Technical Field

[0001] The utility model relates to the technical field of negative pressure equipment, in particular to a packaging bag opening machine. Background Art

[0002] Industries like healthcare, food, and chemicals often require the processing of large quantities of flexible packaging materials, such as infusion bags and food bags. Traditional manual bag opening is not only inefficient but also prone to contamination due to human error. While existing automated bag opening equipment can improve efficiency, it often comes with complex structures and high costs, making it unsuitable for small businesses or low-volume production scenarios.

[0003] Some low-cost small bag opening machines mainly use suction cups in conjunction with negative pressure tubes and negative pressure machines to achieve the adsorption effect on packaging bags. However, this type of equipment has certain damage to packaging bags, especially for some thin packaging bags, which are prone to stretching and deformation at the joints. Utility Model Content

[0004] The purpose of the utility model is to provide a packaging bag opening machine, which can efficiently open the packaging bag and effectively protect the packaging bag.

[0005] The present invention is realized through the following technical solutions: the packaging bag opening machine of the present invention comprises a pair of negative pressure mechanisms arranged opposite to each other, and a pair of driving mechanisms; one of the driving mechanisms is connected to one of the negative pressure mechanisms; the pair of driving mechanisms is used to drive the pair of negative pressure mechanisms to move closer / away; the negative pressure mechanism comprises a horizontally arranged negative pressure plate, a negative pressure cavity arranged inside the negative pressure plate, a first negative pressure hole opened on the side where the pair of negative pressure plates are close to each other, a negative pressure tube connected to the negative pressure cavity, and a negative pressure machine connected to the negative pressure tube; the first negative pressure hole is connected to the negative pressure cavity.

[0006] Furthermore, the negative pressure mechanism also includes a hollow expansion plate, a second negative pressure hole opened on the side wall of the expansion plate, and a connecting tube for connecting the negative pressure chamber and the expansion plate; the expansion plate and the end of the negative pressure plate are detachably connected.

[0007] Furthermore, a T-shaped slot is provided at the end of the negative pressure plate in the vertical direction, and a T-shaped clip is provided on the side of the expansion plate; the clip is clamped in the slot.

[0008] Furthermore, a fixed block is provided on the side of the negative pressure plate close to the driving mechanism, a support plate is connected to the upper side of the fixed block, the support plate is hinged with a connecting plate, and a horizontally arranged pressure plate is provided on the side of the connecting plate away from the support plate; the support plate and the connecting plate are hinged by a hinge shaft; the distance between the hinge shaft and the end face of the negative pressure plate having the first negative pressure hole is L1, and the distance between the hinge shaft and the end face of the pressure plate close to the negative pressure plate is L2, and L1=L2.

[0009] Furthermore, the driving mechanism includes a horizontally arranged telescopic cylinder, and a telescopic rod of the telescopic cylinder is fixedly connected to the fixed block.

[0010] Furthermore, the telescopic cylinder is one of an air cylinder, an electric push rod, and a hydraulic cylinder.

[0011] Furthermore, a horizontally arranged push plate is provided on the cylinder body of the telescopic cylinder, the push plate is arranged toward the connecting plate, and the height of the push plate is higher than the height of the hinge shaft.

[0012] Furthermore, a U-shaped spring piece is provided between the connecting plate and the fixing block.

[0013] The technical solution of the present invention has at least the following advantages and beneficial effects: when in use, the packaging bag opening machine of the present invention places the packaging bag to be filled with its opening facing upwards between a pair of negative pressure mechanisms, and then a pair of driving mechanisms drives a pair of negative pressure plates close to the sides of the packaging bag, and the air in the negative pressure tube and the negative pressure chamber is extracted by the negative pressure machine to generate negative pressure in the negative pressure chamber, and finally the packaging bag is sucked through the first negative pressure hole, and then the driving mechanism pulls the negative pressure plate to move, thereby opening the opening of the packaging bag, and then the filling or packaging operation can be carried out. By using a negative pressure plate and opening dense negative pressure holes on the negative pressure plate, the contact area between the packaging bag and the negative pressure plate can be significantly increased, and the force-bearing area of ​​the packaging bag can be increased. In this way, for some packaging bags with smaller thicknesses, the packaging bag can be better protected to avoid rupture or deformation caused by pulling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of a state of the packaging bag opening machine provided by an embodiment of the present utility model during operation;

[0015] Figure 2 A schematic structural diagram of a negative pressure mechanism provided by an embodiment of the present utility model from one perspective;

[0016] Figure 3 A schematic structural diagram of a negative pressure mechanism provided by an embodiment of the present utility model from two perspectives;

[0017] Figure 4A schematic structural diagram of the negative pressure plate portion provided in an embodiment of the present utility model;

[0018] Figure 5 A schematic structural diagram of the expansion board portion provided in an embodiment of the present utility model;

[0019] Figure 6 A schematic diagram of the structure of the packaging bag opening machine in two states during operation provided by an embodiment of the utility model;

[0020] Figure 7 This is a schematic structural diagram of the three states of the packaging bag opening machine during operation provided by an embodiment of the utility model.

[0021] Icons: 10-negative pressure mechanism, 11-negative pressure plate, 12-first negative pressure hole, 13-fixing block, 14-negative pressure tube, 15-support plate, 16-hinge shaft, 17-connecting plate, 18-pressure plate, 19-spring, 110-slot, 20-driving mechanism, 21-telescopic cylinder, 22-telescopic rod, 23-push plate, 31-expansion plate, 32-second negative pressure hole, 33-card strip, 34-connecting tube, 40-packaging bag. DETAILED DESCRIPTION

[0022] Example

[0023] The following is further described in conjunction with specific embodiments. Figure 1 -Attached Figure 7 As shown, the packaging bag opening machine of this embodiment includes a pair of oppositely arranged negative pressure mechanisms 10, and a pair of driving mechanisms 20; one driving mechanism 20 is connected to one negative pressure mechanism 10; the pair of driving mechanisms 20 is used to drive the pair of negative pressure mechanisms 10 to move closer / away; the negative pressure mechanism 10 includes a horizontally arranged negative pressure plate 11, a negative pressure cavity provided inside the negative pressure plate 11, a first negative pressure hole 12 opened on the side where the pair of negative pressure plates 11 are close to each other, a negative pressure tube 14 connected to the negative pressure cavity, and a negative pressure machine connected to the negative pressure tube 14; the first negative pressure hole 12 is connected to the negative pressure cavity. Specifically, during use, the packaging bag 40 to be filled is placed with its opening facing upward between a pair of negative pressure mechanisms 10. Then, a pair of driving mechanisms 20 drives a pair of negative pressure plates 11 close to the sides of the packaging bag 40. The negative pressure machine extracts air from the negative pressure tube 14 and the negative pressure chamber, thereby generating negative pressure in the negative pressure chamber. Finally, the packaging bag 40 is sucked in through the first negative pressure hole 12. Then, the driving mechanism 20 pulls the negative pressure plate 11 to move, thereby opening the opening of the packaging bag 40, and then the filling or packaging operation can be carried out. By using the negative pressure plate 11 and providing densely packed negative pressure holes on the negative pressure plate 11, the contact area between the packaging bag 40 and the negative pressure plate 11 can be significantly increased, and the force-bearing area of ​​the packaging bag 40 can be increased. In this way, for some packaging bags 40 with smaller thicknesses, the packaging bag 40 can be better protected to prevent the packaging bag 40 from rupturing or being deformed by pulling.

[0024] The negative pressure mechanism 10 in this embodiment also includes a hollow expansion plate 31, a second negative pressure hole 32 defined in the sidewall of the expansion plate 31, and a connecting tube 34 for connecting the negative pressure chamber to the expansion plate 31. The expansion plate 31 is detachably connected to the ends of the negative pressure plate 11. Specifically, for packaging bags 40 of varying widths, the expansion plate 31 can be connected at both ends of the negative pressure plate 11, and the negative pressure chamber and the expansion plate 31 are connected via a connecting plate 17. This allows the expansion plate 31 to retain the packaging bag 40 under negative pressure, ensuring stable suction and opening of even wide bags 40.

[0025] In this embodiment, a T-shaped slot 110 is vertically provided at the end of the negative pressure plate 11, and a T-shaped clip 33 is provided on the side of the expansion plate 31; the clip 33 is clipped into the slot 110. Specifically, by sliding the clip 33 downward and snapping it into the slot 110, the expansion plate 31 can be quickly installed on the negative pressure plate 11.

[0026] In this embodiment, the negative pressure plate 11 is provided with a fixed block 13 on the side near the drive mechanism 20. The upper side of the fixed block 13 is connected to a support plate 15, which is hinged to a connecting plate 17. A horizontally arranged pressure plate 18 is provided on the side of the connecting plate 17 away from the support plate 15. The support plate 15 and the connecting plate 17 are hingedly connected by a hinge shaft 16. The distance between the hinge shaft 16 and the end surface of the negative pressure plate 11 having the first negative pressure hole 12 is L1, and the distance between the hinge shaft 16 and the end surface of the pressure plate 18 on the side near the negative pressure plate 11 is L2, where L1 = L2. Specifically, after the negative pressure plate 11 is used to suck and pull the packaging bag 40 apart, the connecting plate 17 can be rotated so that the pressure plate 18 presses against the inner wall of the packaging bag 40, thereby temporarily clamping the packaging bag 40 through the negative pressure plate 11 and the pressure plate 18. For long-term and heavy filling of items, this can effectively prevent the packaging bag 40 from falling off during the filling process.

[0027] The driving mechanism in this embodiment includes a horizontally arranged telescopic cylinder 21, and a telescopic rod 22 of the telescopic cylinder 21 is fixedly connected to the fixed block 13. The telescopic cylinder 21 is one of a pneumatic cylinder, an electric push rod, and a hydraulic cylinder.

[0028] In this embodiment, a horizontal push plate 23 is provided on the cylinder body of the telescopic cylinder 21. The push plate 23 is arranged toward the connecting plate 17. The height of the push plate 23 is higher than the height of the hinge shaft 16. Specifically, after the negative pressure plate 11 sucks the packaging bag 40 and pulls the packaging bag 40 open, the connecting plate 17 moves to the push plate 23 under the pull of the telescopic cylinder 21 (as shown in the attached figure). Figure 6 As shown), the connecting plate 17 continues to move toward the push plate 23, and the push plate 23 pushes the connecting plate 17. Under the action of the connecting plate 17, the splint rests against the inner wall of the packaging bag 40 (as shown in the attached figure). Figure 7As shown), the packaging bag 40 can be automatically clamped without manual operation.

[0029] In this embodiment, a U-shaped spring piece 19 is provided between the connecting plate 17 and the fixing block 13. Specifically, when the connecting plate 17 moves away from the push plate 23 and loses the force of the push plate 23, the spring piece 19 can rebound the connecting plate 17 and the clamping plate to their previous positions. The spring piece 19 can also be replaced by a spring, a torsion spring, etc.

[0030] In summary, when the packaging bag opening machine of this embodiment is used, the packaging bag 40 to be filled is placed with the opening facing upward between a pair of negative pressure mechanisms 10. Then, a pair of driving mechanisms 20 drives a pair of negative pressure plates 11 close to the sides of the packaging bag 40. The negative pressure machine extracts air from the negative pressure tube 14 and the negative pressure chamber, thereby generating negative pressure in the negative pressure chamber. Finally, the packaging bag 40 is sucked through the first negative pressure hole 12. Then, the driving mechanism 20 pulls the negative pressure plate 11 to move, thereby opening the opening of the packaging bag 40, and then the filling or packaging operation can be carried out. By using the negative pressure plate 11 and opening dense negative pressure holes on the negative pressure plate 11, the contact area between the packaging bag 40 and the negative pressure plate 11 can be significantly increased, and the force-bearing area of ​​the packaging bag 40 can be increased. In this way, for some packaging bags 40 with smaller thicknesses, the packaging bag 40 can be better protected to prevent the packaging bag 40 from rupturing or being deformed by pulling.

[0031] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A packaging bag opening machine, characterized by: The invention comprises a pair of negative pressure mechanisms (10) arranged opposite to each other, and a pair of driving mechanisms (20); one of the driving mechanisms (20) is connected to one of the negative pressure mechanisms (10); the pair of driving mechanisms (20) is used to drive the pair of negative pressure mechanisms (10) to move closer to or farther away from each other; The negative pressure mechanism (10) includes a horizontally arranged negative pressure plate (11), a negative pressure cavity arranged inside the negative pressure plate (11), a first negative pressure hole (12) opened on one side of a pair of the negative pressure plates (11) close to each other, a negative pressure tube (14) connected to the negative pressure cavity, and a negative pressure machine connected to the negative pressure tube (14); the first negative pressure hole (12) is connected to the negative pressure cavity.

2. The packaging bag opening machine according to claim 1, characterized in that: The negative pressure mechanism (10) further includes a hollow expansion plate (31), a second negative pressure hole (32) provided on a side wall of the expansion plate (31), and a connecting pipe (34) for connecting the negative pressure chamber with the expansion plate (31); The expansion plate (31) is detachably connected to the end of the negative pressure plate (11).

3. The packaging bag opening machine according to claim 2, characterized in that: A T-shaped clamping groove (110) is provided at the end of the negative pressure plate (11) in the vertical direction, and a T-shaped clamping strip (33) is provided on the side of the expansion plate (31); the clamping strip (33) is clamped in the clamping groove (110).

4. The packaging bag opening machine according to claim 1, characterized in that: A fixing block (13) is provided on a side of the negative pressure plate (11) close to the driving mechanism (20); a support plate (15) is connected to the upper side of the fixing block (13); a connecting plate (17) is hingedly connected to the support plate (15); and a horizontally arranged pressing plate (18) is provided on a side of the connecting plate (17) away from the support plate (15); The support plate (15) and the connecting plate (17) are hinged via a hinge shaft (16); the distance between the hinge shaft (16) and the end face of the negative pressure plate (11) on which the first negative pressure hole (12) is provided is L1, and the distance between the hinge shaft (16) and the end face of the pressure plate (18) on the side close to the negative pressure plate (11) is L2, and L1=L2.

5. The packaging bag opening machine according to claim 4, characterized in that: The driving mechanism comprises a telescopic cylinder (21) arranged horizontally, and a telescopic rod (22) of the telescopic cylinder (21) is fixedly connected to the fixed block (13).

6. The packaging bag opening machine according to claim 5, characterized in that: The telescopic cylinder (21) is one of an air cylinder, an electric push rod and a hydraulic cylinder.

7. The packaging bag opening machine according to claim 5, characterized in that: A horizontally arranged push plate (23) is provided on the cylinder body of the telescopic cylinder (21). The push plate (23) is arranged toward the connecting plate (17). The height of the push plate (23) is higher than the height of the hinge shaft (16).

8. The packaging bag opening machine according to claim 7, characterized in that: A U-shaped spring piece (19) is provided between the connecting plate (17) and the fixing block (13).

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