Flexible packaging bag opening device

Abstract

The invention discloses a flexible packaging bag opening device. The flexible packaging bag opening device comprises a base, a bag grabbing assembly, an up-down driver, a bag grabbing driver and an opening guide mechanism. The bag grabbing assembly comprises a front suction cup assembly, a rear suction cup assembly and a synchronous linkage mechanism, the front suction cup assembly and the rear suction cup assembly are in linkage through the synchronous linkage mechanism, the bag grabbing assembly is arranged on the base in an up-and-down moving mode and is provided with a bag inlet position and an opening position from top to bottom, and the up-and-down driver is configured to drive the bag grabbing assembly to move up and down. The bag grabbing driver is configured to drive the front suction cup assembly and the rear suction cup assembly to get close to each other and get away from each other, the opening guide mechanism is arranged on the base and provided with a guide part, and the front suction cup assembly is matched with the guide part. The guiding part guides the front suction cup assembly to gradually deviate forwards relative to the base. According to the opening device for the flexible packaging bag, the bag opening action is gentle, and the success rate and quality of opening the bag opening of the flexible packaging bag can be improved.

Description

Technical Field

[0001] This invention relates to packaging production equipment, and more particularly to an opening device for flexible packaging bags. Background Technology

[0002] In existing spout pouch production lines, the operation of opening the flexible packaging bag opening is mainly achieved through a flexible packaging bag opening device. In existing technology, the flexible packaging bag opening device uses two suction cup components to respectively suction the front and rear sides of the bag opening. A cylinder directly moves the two suction cup components away from each other, thereby opening the bag opening. However, the direct and rapid cylinder drive of the aforementioned opening device can easily lead to the packaging bag falling off, or abnormal opening, or the bag opening failing to open. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a flexible packaging bag opening device with a smooth opening action, which can improve the success rate and quality of opening the flexible packaging bag.

[0004] According to an embodiment of the present invention, a flexible packaging bag opening device includes: a base; a bag gripping assembly including a front suction cup assembly, a rear suction cup assembly, and a synchronous linkage mechanism. The front suction cup assembly is provided with a rearward-facing front suction cup, and the rear suction cup assembly is provided with a forward-facing rear suction cup. The front suction cup and the rear suction cup are opposite each other and form a bag opening gripping position between them. The front suction cup assembly and the rear suction cup assembly are linked together by the synchronous linkage mechanism, which is used to make the front suction cup assembly and the rear suction cup assembly move closer to each other and move further apart synchronously. The bag gripping assembly is movably mounted on the base and has a bag inlet position and an opening position from top to bottom; a vertical drive is configured to drive the bag gripping assembly to move up and down; a bag gripping drive is configured to drive the front suction cup assembly and the rear suction cup assembly to move closer and further apart; an opening guide mechanism is mounted on the base and has a guide part. The front suction cup assembly cooperates with the guide part. When the bag gripping assembly moves down from the bag inlet position to the opening position, the guide part guides the front suction cup assembly to gradually deviate forward relative to the base.

[0005] According to an embodiment of the present invention, a flexible packaging bag opening device has at least the following beneficial effects: the opening device, by setting an opening guide mechanism, enables the front suction cup assembly and the rear suction cup assembly to gradually move away from each other to open the bag opening. Since the bag opening is driven to open by gradual displacement, the opening action is smooth, resulting in good opening quality.

[0006] According to some embodiments of the present invention, a suction nozzle inlet is provided directly below the bag gripping assembly. When the bag gripping assembly moves downward from the bag inlet to the opening position, the bag opening end gripping position of the bag gripping assembly moves to the suction nozzle inlet position.

[0007] According to some embodiments of the present invention, the opening guide mechanism includes a guide rod, the lower end of which is hinged to the base, and the guide portion is a guide rail arranged along the length direction of the guide rod. The front suction cup assembly is slidably connected to the guide portion. The bag gripping driver is connected to the upper end of the guide rod and is used to drive the upper end of the guide rod to swing back and forth relative to the base. When the upper end of the guide rod swings back and forth, it can drive the front suction cup assembly to move closer to and away from the rear suction cup assembly. When the bag gripping assembly is in the bag inlet position: the front suction cup assembly is arranged corresponding to the upper end of the guide rod. After the bag gripping driver drives the upper end of the guide rod to swing and drives the front suction cup assembly to move closer to the rear suction cup assembly, the guide portion of the guide rod is inclined relative to the direction of movement of the bag gripping assembly, and along the lower direction, the guide portion has a tendency to gradually deviate forward relative to the base.

[0008] According to some embodiments of the present invention, the bag gripping driver is a telescopic driver, the bag gripping driver is hinged to the base, and the bag gripping driver is provided with a telescopic end capable of telescopic movement, the telescopic end being hinged to the upper end of the guide rod.

[0009] According to some embodiments of the present invention, the guide rod and the bag gripper are provided in two sets and are respectively disposed on the left and right sides of the front suction cup assembly.

[0010] According to some embodiments of the present invention, the bag-gripping assembly includes a connecting seat, which is movably connected to the base in a vertical direction. The synchronous linkage mechanism includes a front swing rod, a rear swing rod, and a linkage rod. The front suction cup assembly is fixed to the lower end of the front swing rod, and the front swing rod is hinged to the connecting seat so that the front suction cup assembly can swing back and forth relative to the connecting seat. The rear suction cup assembly is fixed to the lower end of the rear swing rod, and the rear swing rod is hinged to the connecting seat so that the rear suction cup assembly can swing back and forth relative to the connecting seat. The two ends of the linkage rod are respectively hinged to the front swing rod and the rear swing rod. The pendulum arm is defined as follows: the hinge axis between the front pendulum arm and the connecting seat is defined as the front pendulum axis; the hinge axis between the rear pendulum arm and the connecting seat is defined as the rear pendulum axis; the hinge axis between the linkage rod and the front pendulum arm is defined as the front hinge axis; and the hinge axis between the linkage rod and the rear pendulum arm is defined as the rear hinge axis. The position of the front hinge axis is lower than the front pendulum axis and the position of the rear hinge axis is higher than the rear pendulum axis, or the position of the front hinge axis is higher than the front pendulum axis and the position of the rear hinge axis is lower than the rear pendulum axis.

[0011] According to some embodiments of the present invention, the synchronous linkage mechanism is provided in two sets and is respectively located at the left and right ends of the front suction cup assembly and the rear suction cup assembly.

[0012] According to some embodiments of the present invention, a bag guiding mechanism is further included, which is fixed to the base and is used to guide and position the packaging bag.

[0013] According to some embodiments of the present invention, a limiting and positioning mechanism is further included, which is disposed on the base and used to position the upper and lower limit positions of the bag gripping assembly to form the bag inlet position and the opening position, respectively.

[0014] According to some embodiments of the present invention, at least two bag opening gripping positions are formed between the front suction cup assembly and the rear suction cup assembly, and the bag opening gripping positions are arranged side by side in the left-right direction.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention; Figure 2 This is an exploded view diagram of an embodiment of the present invention; Figure 3 This is a three-dimensional schematic diagram of the bag-grabbing component of an embodiment of the present invention after it is in the bag-feeding position and has grasped the packaging bag by the front suction cup component and the rear suction cup component. Figure 4 for Figure 3 Enlarged view of point A; Figure 5 This is a perspective view of the bag gripping assembly in the open position and moved to the position of attaching the suction nozzle according to an embodiment of the present invention; Figure 6 for Figure 5 Enlarged view of point B; Figure 7 This is one of the perspective schematic diagrams of the bag guiding mechanism according to an embodiment of the present invention; Figure 8 This is a second perspective view of the bag guiding mechanism according to an embodiment of the present invention.

[0017] Figure label: Packaging bag 1, nozzle 2; Base 100, crossbar 110; Bag gripping assembly 200, front suction cup assembly 210, rear suction cup assembly 220, synchronous linkage mechanism 230, connecting seat 240, front suction cup 211, rear suction cup 221, front swing arm 231, rear swing arm 232, linkage rod 233, upper limit screw 234, lower limit screw 235. Upper and lower drivers 300; Bag grabber driver 400; Opening guide mechanism 500, guide part 510, guide rod 520; Hinged base 600; Bag guiding mechanism 700, left guide shell 710, right guide shell 720, left guide channel 711, left conical section 712, left straight section 713, left entry opening 714, left exit opening 715, right guide channel 721, right conical section 722, right straight section 723, right entry opening 724, right exit opening 725; Limiting and positioning mechanism 800, upper abutment block 810, lower abutment block 820. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0020] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 8 A flexible packaging bag opening device includes: a base 100, a bag gripping assembly 200, an upper and lower driver 300, a bag gripping driver 400, and an opening guide mechanism 500. The bag gripping assembly 200 includes a front suction cup assembly 210, a rear suction cup assembly 220, and a synchronous linkage mechanism 230. The front suction cup assembly 210 has a rearward-facing front suction cup 211, and the rear suction cup assembly 220 has a forward-facing rear suction cup 221. The front suction cups 211 and 221 are opposite each other and form a bag opening gripping position between them. The front suction cup assembly 210 and 220 are linked together by the synchronous linkage mechanism 230, which is used to synchronously bring the front suction cup assembly 210 and 220 closer together and synchronously move away from each other. The bag gripping assembly 200 is vertically movably mounted on the base 100 and has a bag entry position and an opening position from top to bottom. The up-down driver 300 is configured to drive the bag gripping assembly 200 to move up and down, and the bag gripping driver 400 is configured to drive the front suction cup assembly 210 and the rear suction cup assembly 220 to move closer and further apart. The opening guide mechanism 500 is disposed on the base 100 and is provided with a guide part 510. The front suction cup assembly 210 cooperates with the guide part 510. When the bag gripping assembly 200 moves down from the bag inlet position to the opening position, the guide part 510 guides the front suction cup assembly 210 to gradually deviate forward relative to the base 100.

[0023] When the above-mentioned device is working, the bag gripping assembly 200 is initially in the bag infeed position. Before the packaging bag 1 is fed in, the bag gripping driver 400 moves the front suction cup assembly 210 and the rear suction cup assembly 220 away from each other, so that the outer packaging bag 1 is fed into the bag gripping assembly 200 vertically with the bag opening facing down, and the bag opening of the packaging bag 1 is positioned at the bag opening gripping position. At this time, the bag gripping driver 400 drives the front suction cup assembly 210 and the rear suction cup assembly 220 to move closer to each other, so that the front suction cup 211 and the rear suction cup 221 can grip the bag. The bag opening of packaging bag 1 is positioned on the front and back sides. The upper and lower actuators 300 move the bag gripping assembly 200 downwards to the opening position. During this movement, the guide part 510 of the opening guide mechanism 500 guides the front suction cup assembly 210 to gradually deviate forward. The front suction cup assembly 210, in turn, is linked to the rear suction cup assembly 220 via the synchronous linkage mechanism 230, causing the rear suction cup assembly 220 to gradually deviate backwards. Thus, the front suction cup 211 and rear suction cup 221 can gradually open the bag opening of packaging bag 1. This opening device, by setting the opening guide mechanism 500, allows the front suction cup assembly 210 and rear suction cup assembly 220 to gradually move away from each other, thereby opening the bag opening. Because the bag opening is driven by gradual displacement, the opening action is smooth, resulting in good opening quality.

[0024] In this embodiment, a suction nozzle inlet is located directly below the bag gripping assembly 200. When the bag gripping assembly 200 moves downward from the inlet to the opening position, the bag opening gripping position of the bag gripping assembly 200 moves to the suction nozzle inlet position. With this structure, when the bag gripping assembly 200 moves to the opening position, it can directly engage the suction nozzle 2, thus completing the bag-fitting action of the suction nozzle 2 simultaneously with the opening process, resulting in high production efficiency. After bagging is completed, the packaging bag 1 can be released by breaking the vacuum through the front suction cup 211 and the rear suction cup 221.

[0025] In this embodiment, the suction nozzle 2 can be transported from the outside to the suction nozzle entry position by some conveying mechanism. To clearly illustrate the structure of this opening device, the conveying mechanism of the suction nozzle 2 is hidden in the attached figure.

[0026] In this embodiment, the opening guide mechanism 500 includes a guide rod 520, the lower end of which is hinged to the base 100. The guide part 510 is a guide rail arranged along the length direction of the guide rod 520. The front suction cup assembly 210 is slidably connected to the guide part 510. The bag gripping driver 400 is connected to the upper end of the guide rod 520 and is used to drive the upper end of the guide rod 520 to swing back and forth relative to the base 100. When the upper end of the guide rod 520 swings back and forth, it can drive the front suction cup assembly 210. When the bag gripping assembly 200 is in the bag-feeding position, the front suction cup assembly 210 is positioned at the upper end of the guide rod 520. After the bag gripping driver 400 drives the upper end of the guide rod 520 to swing and move the front suction cup assembly 210 closer to the rear suction cup assembly 220, the guide part 510 of the guide rod 520 is inclined relative to the direction of movement of the bag gripping assembly 200, and along the downward direction, the guide part 510 has a tendency to gradually deviate forward relative to the base 100.

[0027] The opening guide mechanism 500 uses a guide rod 520, which slides through the guide part 510 and the front suction cup assembly 210 to form a linkage slider structure. The bag gripping driver 400 can drive the upper end of the guide rod 520 to swing, so that the front suction cup assembly 210 can move closer to and further away from the rear suction cup assembly 220 to realize the function of gripping and releasing the packaging bag. In addition, when the bag gripping driver 400 drives the upper end of the guide rod 520 to swing and move the front suction cup assembly 210 closer to the rear suction cup assembly 220, it can grasp the bag opening position. At the same time, the guide part 510 of the guide rod 520 forms a structure that is inclined relative to the direction of movement of the bag gripping assembly 200. When the upper and lower drivers 300 drive the bag gripping assembly 200 to move downward, the inclined guide part 510 can realize the action of the front suction cup assembly 210 gradually moving forward away from the rear suction cup assembly 220, thereby opening the bag opening. The above-described structure links the bag gripper 400 and the opening guide mechanism 500 together. It is ingeniously designed, compact, and reliable in operation. The bag gripper 400 grasps the bag opening position through the guide rod 520. After the bag opening position is grasped, when the bag gripper assembly 200 is further driven to move downward along the guide rod 520, the front suction cup assembly 210 and the rear suction cup assembly 220 can be separated without the bag gripper 400 being activated. This does not increase the complexity of control and the mechanism operates smoothly.

[0028] In this embodiment, the guide portion 510 is a groove formed in the guide rod 520, and the front suction cup assembly 210 can be fitted with a suitable slider. Of course, it is conceivable that the guide portion 510 can also be a slide rail, and the front suction cup assembly 210 can be fitted with a corresponding structure to fit the slide rail.

[0029] In this embodiment, the bag-gripping actuator 400 is a telescopic actuator, hinged to the base 100. The bag-gripping actuator 400 has a telescopic end capable of retracting, which is hinged to the upper end of the guide rod 520. In this embodiment, one end of the bag-gripping actuator 400 is connected to a hinge seat 600, which is pivotally connected to the base 100, thereby achieving a hinged connection between the bag-gripping actuator 400 and the base 100. When the telescopic end of the bag-gripping actuator 400 extends, it can push the guide rod 520 away from the base 100; conversely, when the telescopic end of the bag-gripping actuator 400 retracts, it can retract the guide rod 520 relative to the base 100, thereby achieving a swing drive for the guide rod 520. The aforementioned bag-gripping actuator 400 has a simple structure and smooth operation.

[0030] In this embodiment, the bag-gripping driver 400 can be a cylinder, with the cylinder body and the end of the piston rod hinged to the hinge seat 600 and the base 100, respectively. Of course, it is conceivable that the bag-gripping driver 400 can also be other structures, such as an electric push rod or an electromagnet, etc., and the specific configuration can be made according to the actual situation.

[0031] In this embodiment, two sets of guide rods 520 and bag gripper drivers 400 are provided and respectively located on the left and right sides of the front suction cup assembly 210, thereby forming drive and guidance at both ends, resulting in smoother operation.

[0032] In this embodiment, the bag-gripping assembly 200 includes a connecting seat 240, which is movably connected to the base 100 in the vertical direction. The synchronous linkage mechanism 230 includes a front swing rod 231, a rear swing rod 232, and a linkage rod 233. The front suction cup assembly 210 is fixed to the lower end of the front swing rod 231, and the front swing rod 231 is hinged to the connecting seat 240 so that the front suction cup assembly 210 can swing back and forth relative to the connecting seat 240. The rear suction cup assembly 220 is fixed to the lower end of the rear swing rod 232, and the rear swing rod 232 is hinged to the connecting seat 240 so that the rear suction cup assembly 220 can swing back and forth relative to the connecting seat 240. The connecting seat 240 swings back and forth. The two ends of the linkage rod 233 are respectively hinged to the front swing rod 231 and the rear swing rod 232. The hinge axis between the front swing rod 231 and the connecting seat 240 is defined as the front swing axis, the hinge axis between the rear swing rod 232 and the connecting seat 240 is defined as the rear swing axis, the hinge axis between the linkage rod 233 and the front swing rod 231 is defined as the front hinge axis, and the hinge axis between the linkage rod 233 and the rear swing rod 232 is defined as the rear hinge axis. The position of the front hinge axis is lower than the front swing axis and the position of the rear hinge axis is higher than the rear swing axis. When the front suction cup assembly 210 swings forward, the linkage rod 233 pulls the rear swing rod 232 above its hinge axis, causing the rear swing rod 232 and the rear suction cup assembly 220 to swing backward, thus moving the front suction cup assembly 210 and the rear suction cup assembly 220 away from each other. Similarly, when the rear suction cup assembly 220 swings backward, it also drives the front suction cup assembly 210 to swing forward. When the front suction cup assembly 210 swings backward, the linkage rod 233 pushes the rear swing rod 232 backward above its hinge axis, causing the rear swing rod 232 and the rear suction cup assembly 220 to swing forward, thus moving the front suction cup assembly 210 and the rear suction cup assembly 220 closer to each other. Similarly, when the rear suction cup assembly 220 swings forward, it also drives the front suction cup assembly 210 to swing backward. In other embodiments, the position of the front hinge axis can be set higher than the front swing axis and the position of the rear hinge axis can be set lower than the rear swing axis, achieving the same function. The aforementioned synchronous linkage mechanism 230 uses a multi-link structure to achieve synchronous linkage. Compared with the existing technology that uses gears to achieve synchronization, it has no meshing friction, resulting in less wear, better durability, smoother linkage operation, and no meshing gap.

[0033] In this embodiment, the front swing arm 231 is threadedly connected to an upper limit screw 234 and a lower limit screw 235. The upper limit screw 234 and the lower limit screw 235 are located on the upper and lower sides of the hinge axis between the front swing arm 231 and the connecting seat 240, and are respectively facing the rear swing arm 232 on the upper and lower sides of its hinge axis. This can limit the swing angle range of the front swing arm 231 relative to the rear swing arm 232. Furthermore, the upper limit screw 234 and the lower limit screw 235 can be threadedly adjusted to adjust the position of the limit.

[0034] In this embodiment, the synchronous linkage mechanism 230 is provided in two sets and is respectively located at the left and right ends of the front suction cup assembly 210 and the rear suction cup assembly 220, thereby forming a linkage between the two ends and making the operation more stable.

[0035] In this embodiment, the up-and-down actuator 300 is a cylinder, with the cylinder body fixed to the base 100 and the piston rod and connecting seat 240 fixed. In some embodiments, the cylinder body can also be fixed to the connecting seat 240, while the piston rod is connected to the base 100, which can also drive the bag-grabbing assembly 200 to move up and down. It is conceivable that the up-and-down actuator 300 is not limited to a cylinder; for example, it can also be an electric push rod, an electromagnet, etc., and the specific configuration can be made according to the actual situation.

[0036] In this embodiment, the left and right ends of the connecting seat 240 are slidably mounted on the base 100 via linear guide rails, which are vertically positioned to allow the bag-gripping assembly 200 to move up and down. It is conceivable that in other embodiments, the bag-gripping assembly 200 can also move up and down via guide rods, depending on the specific configuration required.

[0037] In this embodiment, a bag guiding mechanism 700 is also included. The bag guiding mechanism 700 is fixed to the base 100 and is used to guide and position the packaging bag. By providing the bag guiding mechanism 700, the packaging bag can be easily guided and positioned, ensuring that the operation can proceed smoothly.

[0038] In an embodiment, the bag guiding mechanism 700 includes a left guide shell 710 and a right guide shell 720, which are spaced apart from each other. The left guide shell 710 is provided with a left guide channel 711, which includes a left conical section 712 and a left straight section 713. The larger end of the left conical section 712 is located on the upper side and has an upward-facing left entry opening 714. The left straight section 713 extends vertically and its upper end is connected to the smaller end of the left conical section 712. The lower end of the left straight section 713 has a left exit opening 715. The right guide housing 720 is provided with a right guide channel 721, which includes a right conical section 722 and a right straight section 723. The larger end of the right conical section 722 is located on the upper side and has an upward-facing right entry opening 724. The right straight section 723 extends vertically and its upper end connects with the smaller end of the right conical section 722. The lower end of the right straight section 723 has a right exit opening 725. The left guide channel 711 and the right guide channel 721 are arranged opposite each other and each has an opening on the side closest to it. A front suction cup 211 and a rear suction cup 221 are respectively provided on the front and rear sides between the left straight section 713 and the right straight section 723. When the bag is inserted, the left and right sides of the packaging bag 1 can be aligned with the left entry opening 714 and the right entry opening 724, respectively. Guided by the left conical section 712 and the right conical section 722, the opening of the packaging bag 1 enters the left straight section 713 and the right straight section 723 and is grasped by the front suction cup 211 and the rear suction cup 221. As the bag gripping assembly 200 moves the packaging bag 1 downwards, the left straight section 713 and the right straight section 723 can position and guide the left and right sides of the packaging bag 1, thereby ensuring accurate positioning. The bag guiding mechanism 700 described above has a simple structure, is easy to implement, and provides stable and accurate guidance. It is conceivable that in other embodiments, the bag guiding mechanism 700 can also have other structures, such as guide rollers, etc., which can be set according to the actual situation.

[0039] In this embodiment, the base 100 is provided with a crossbar 110, which extends left and right. The upper ends of the left guide shell 710 and the right guide shell 720 are connected to the crossbar 110 and can be adjusted left and right along the crossbar 110, thereby facilitating the adaptation to packaging bags 1 of different sizes, as well as adjusting the spacing and guiding position. In this embodiment, the crossbar 110 has multiple mounting holes along its length. The upper ends of the left guide shell 710 and the right guide shell 720 are provided with left and right extending slots. Screws pass through these slots and are suitable for fixing to mounting holes at any position, thereby realizing adjustment in the left and right directions.

[0040] In this embodiment, a limiting and positioning mechanism 800 is also included. The limiting and positioning mechanism 800 is disposed on the base 100 and used to position the upper and lower limit positions of the bag-gripping assembly 200 to respectively form the bag-entry position and the opening position. Using the above structure, the upper and lower positions of the bag-gripping assembly 200 can be limited and positioned, facilitating accurate positioning. Of course, in some embodiments, when using vertical actuators 300 capable of positioning actions, such as linear motors, lead screw platforms, etc., the limiting and positioning mechanism 800 may not be necessary.

[0041] In this embodiment, the limiting and positioning mechanism 800 includes an upper abutment block 810 and a lower abutment block 820, which are respectively disposed on the upper and lower sides of the connecting seat 240 of the bag gripping assembly 200. In this embodiment, some buffers can be provided to buffer the upper and lower positions of the bag gripping assembly 200.

[0042] In this embodiment, at least two bag opening gripping positions are formed between the front suction cup assembly 210 and the rear suction cup assembly 220, and the bag opening gripping positions are arranged side by side in the left-right direction. Using the above structure, multi-station opening operations can be achieved, resulting in high production efficiency.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A soft pack bag opening device characterized by comprising: Comprise: a base (100); a bag grabbing assembly (200) comprising a front sucker assembly (210), a rear sucker assembly (220) and a synchronous linkage mechanism (230), the front sucker assembly (210) is provided with a front sucker (211) facing backward, the rear sucker assembly (220) is provided with a rear sucker (221) facing forward, the front sucker (211) and the rear sucker (221) are opposite to each other and form a bag opening end grabbing position between them, the front sucker assembly (210) and the rear sucker assembly (220) are linked to each other through the synchronous linkage mechanism (230), the synchronous linkage mechanism (230) is used for synchronously moving the front sucker assembly (210) and the rear sucker assembly (220) close to each other and away from each other; the bag grabbing assembly (200) is movably arranged on the base (100) from top to bottom and has a bag entering position and an opening position from top to bottom; an up-down driver (300) configured to drive the bag grabbing assembly (200) to move up and down; a bag grabbing driver (400) configured to drive the front sucker assembly (210) and the rear sucker assembly (220) to move close to and away from each other; an opening guide mechanism (500) arranged on the base (100), the opening guide mechanism (500) is provided with a guide part (510), the front sucker assembly (210) cooperates with the guide part (510), when the bag grabbing assembly (200) moves from the bag entering position to the opening position, the guide part (510) guides the front sucker assembly (210) to gradually deviate forward relative to the base (100).

2. The soft-pack bag opening device of claim 1, wherein: A suction nozzle entering position is arranged directly below the bag grabbing assembly (200), when the bag grabbing assembly (200) moves from the bag entering position to the opening position, the bag opening end grabbing position of the bag grabbing assembly (200) moves to the suction nozzle entering position.

3. The soft pouch opening device of claim 1, wherein: The opening guide mechanism (500) comprises a guide rod (520), the lower end of the guide rod (520) is hinged to the base (100), the guide part (510) is a guide track arranged along the length direction of the guide rod (520), and the front sucker assembly (210) is slidingly connected with the guide part (510); the bag grabbing driver (400) is connected with the upper end of the guide rod (520) and is used for driving the upper end of the guide rod (520) to swing forward and backward relative to the base (100), when the upper end of the guide rod (520) swings forward and backward, the front sucker assembly (210) can be driven to move close to and away from the rear sucker assembly (220); when the bag grabbing assembly (200) is in the bag entering position, the front sucker assembly (210) is arranged corresponding to the upper end of the guide rod (520), after the bag grabbing driver (400) drives the upper end of the guide rod (520) to swing and drives the front sucker assembly (210) to move close to the rear sucker assembly (220), the guide part (510) of the guide rod (520) is arranged inclined relative to the moving direction of the bag grabbing assembly (200) and in a downward direction, and the guide part (510) has a gradually deviating forward trend relative to the base (100).

4. The soft-pack bag opening device of claim 3, wherein: The bag grabbing driver (400) is a telescopic driver, the bag grabbing driver (400) is hinged to the base (100), the bag grabbing driver (400) is provided with a telescopic end capable of telescopic action, and the telescopic end is hinged to the upper end of the guide rod (520).

5. A soft pack opening device according to claim 3 or 4, characterised in that: The guide rod (520) and the bag grabbing driver (400) are arranged in two groups and are arranged on the left and right sides of the front sucker assembly (210) respectively.

6. The soft pouch opening device of claim 1 or 3, wherein: The bag grabbing assembly (200) comprises a connecting seat (240) movably connected to the base (100) in the up-down direction, the synchronous linkage mechanism (230) comprises a front swing rod (231), a rear swing rod (232) and a linkage rod (233), the front suction disc assembly (210) is fixed to the lower end of the front swing rod (231), the front swing rod (231) is hinged to the connecting seat (240) so that the front suction disc assembly (210) can swing forward and backward relative to the connecting seat (240), the rear suction disc assembly (220) is fixed to the lower end of the rear swing rod (232), the rear swing rod (232) is hinged to the connecting seat (240) so that the rear suction disc assembly (220) can swing forward and backward relative to the connecting seat (240), the two ends of the linkage rod (233) are respectively hinged to the front swing rod (231) and the rear swing rod (232), the hinged axis between the front swing rod (231) and the connecting seat (240) is defined as a front swing axis, the hinged axis between the rear swing rod (232) and the connecting seat (240) is defined as a rear swing axis, the hinged axis between the linkage rod (233) and the front swing rod (231) is defined as a front hinge axis, and the hinged axis between the linkage rod (233) and the rear swing rod (232) is defined as a rear hinge axis; wherein the position of the front hinge axis is lower than that of the front swing axis and the position of the rear hinge axis is higher than that of the rear swing axis, or the position of the front hinge axis is higher than that of the front swing axis and the position of the rear hinge axis is lower than that of the rear swing axis.

7. The soft pouch opening device of claim 6, wherein: The synchronous linkage mechanism (230) is provided with two groups and is arranged at the left and right ends of the front suction disc assembly (210) and the rear suction disc assembly (220) respectively.

8. The soft pouch opening device of claim 1, wherein: The bag guiding mechanism (700) is fixed to the base (100) and is used for guiding and positioning a packaging bag.

9. The soft pouch opening device of claim 1, wherein: The limiting positioning mechanism (800) is arranged on the base (100) and is used for positioning the upper and lower limit positions of the bag grabbing assembly (200) to form the bag feeding position and the opening position respectively.

10. The soft pouch opening device of claim 1, wherein: At least two bag opening end grabbing positions are formed between the front suction disc assembly (210) and the rear suction disc assembly (220) and are arranged side by side in the left-right direction.

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