A folding paper bag grabbing and auxiliary full opening bag mechanism

Abstract

The application relates to a folding paper bag grabbing and auxiliary full opening bag mechanism, and relates to the technical field of intelligent packaging. A linkage device drives a pressing rod to move upwards during the process that a longitudinal moving mechanism drives a paper bag sucking mechanism to move backwards, and then the longitudinal moving mechanism drives the paper bag sucking mechanism to move forwards. Since the rear end of the paper bag is adsorbed and fixed by the paper bag fixing sucking mechanism, the paper bag is gradually opened. While the paper bag sucking mechanism moves forwards, the linkage device drives the pressing rod to move downwards, so that the bottom surface of the paper bag in the curved and folded state is gradually pressed downwards by the downwardly moving pressing rod, and the paper bag is unfolded into a horizontal state until the paper bag is fully opened and the bottom of the paper bag is kept flat. The bag opening mechanism for the folding paper bag does not occupy the upper space of the paper bag, does not have a separate power unit, and can easily and completely open the paper bag by means of the forward and backward movement of the paper bag, and the suction force of the vacuum suction disc on the outer side is not affected.

Description

Technical Field

[0001] This invention relates to the field of intelligent packaging technology, specifically to a gripping and assisted full-opening mechanism for folded paper bags. Background Technology

[0002] Intelligent and self-service devices are increasingly integrated into our lives, such as self-service medicine dispensers and self-service snack vending machines. To protect customer privacy and accommodate multiple purchased items at once, these items often need to be packaged. Paper bags are not only environmentally friendly but also offer privacy due to their opaque nature. This has led to the development of self-service vending terminals that can automatically package items. The mechanism for opening paper bags typically uses vacuum suction cups to adhere to the outside of the folded paper bag and pull it upwards. However, because the bottom of the paper bag is folded, the top opens while the bottom remains folded, reducing the amount of items that can be placed inside and significantly impacting the bag's capacity.

[0003] Commercially available paper bags typically open by blowing compressed air pulses into the bag's interior. Alternatively, the interior of the bag can be inserted into a mechanical moving part to open it. However, this blowing force not only affects the suction cups on the outside of the bag, causing it to fall off, but it also occupies the upper space, severely hindering the placement of items on top of the bag. Summary of the Invention

[0004] In order to overcome the shortcomings of the above technologies, the present invention provides a gripping and auxiliary full-opening mechanism for folded paper bags that relies on the back-and-forth movement of the paper bag to easily and fully open the paper bag.

[0005] The technical solution adopted by this invention to overcome its technical problems is:

[0006] A gripping and assisted full-opening mechanism for foldable paper bags, comprising:

[0007] The base has a frame at its top, and a paper bag storage compartment is set in the frame. Several folded paper bags are stacked in the paper bag storage compartment. Each paper bag is arranged vertically with its opening facing upwards. The front end of the paper bag storage compartment is open.

[0008] The paper bag suction mechanism is mounted on the longitudinal movement mechanism. The longitudinal movement mechanism drives the paper bag suction mechanism to move in the front-back direction. When the paper bag suction mechanism moves to the innermost end, it sucks up the front end of the outermost paper bag.

[0009] The paper bag fixing and suction mechanism is installed on the frame and is located at the left or right end of the paper bag storage compartment;

[0010] The transverse mechanism, located on the base, is used to drive the longitudinal mechanism to move horizontally in the left and right directions. When the paper bag suction mechanism moves the paper bag it has sucked up to the paper bag fixing suction mechanism, the paper bag fixing suction mechanism sucks up the rear end face of the paper bag.

[0011] The pressure bar is horizontally set in the left-right direction and is installed on the frame through a linkage device. When the paper bag suction mechanism moves laterally to the paper bag fixed suction mechanism and moves backward, the paper bag suction mechanism drives the pressure bar to move upward through the linkage device. When the paper bag fixed suction mechanism picks up the rear end of the paper bag, and the paper bag suction mechanism moves forward, the paper bag suction mechanism drives the pressure bar to move downward through the linkage device to press down and flatten the bottom of the paper bag, which is folded at the rear end.

[0012] Furthermore, the aforementioned paper bag suction mechanism includes a vertical plate, and N vacuum suction cups I are installed on the inner end of the vertical plate.

[0013] Furthermore, the aforementioned transverse mechanism is a linear module I mounted on the base, with the axis of the linear module I horizontally positioned in the left-right direction, and the longitudinal mechanism mounted on the slider of the linear module I.

[0014] Furthermore, the aforementioned longitudinal movement mechanism is a linear module II, which is mounted on the slider of linear module I. The axis of linear module II is horizontally arranged along the front-to-back direction, and the paper bag suction mechanism is mounted on the slider of linear module II.

[0015] Preferably, N is 4, and four vacuum suction cups I are installed at the four corners of the upright plate, respectively for adsorbing the upper left, upper right, lower left and lower right corners of the front face of the paper bag.

[0016] Furthermore, the aforementioned paper bag fixing and suction mechanism consists of M vacuum suction cups II mounted on the frame.

[0017] Preferably, M is 2, and two vacuum suction cups II are used to adsorb the upper left and upper right corners of the rear end face of the paper bag, respectively.

[0018] Furthermore, the aforementioned linkage device includes two supports mounted on the frame, arranged in a front-to-back direction and parallel to each other. A swing arm I is rotatably mounted on the inner end of each support via a rotating shaft II. The left and right ends of the pressure rod are respectively connected to the rear end of the swing arm I on the same side. A rotating shaft I is rotatably mounted on one support, with its axis horizontally arranged in a left-to-right direction. A gear is coaxially mounted on the head end of the rotating shaft I. The middle part of the rotating shaft I is connected to the swing arm II. The lower end of the swing arm II is hinged to a connecting rod via a pin I. The lower end of the connecting rod is hinged to the front end of the swing arm I via a pin II. A rack is mounted on the side end of the upright plate, arranged horizontally in a front-to-back direction. When the paper bag suction mechanism moves backward relative to the paper bag fixing suction mechanism, the rack meshes with the gear, which rotates clockwise, driving the pressure rod upward with the swing arm I. When the paper bag suction mechanism moves forward relative to the paper bag fixing suction mechanism, the rack meshes with the gear, which rotates counterclockwise, driving the pressure rod downward with the swing arm I.

[0019] To facilitate reset, a tension spring is also included. The upper end of the tension spring is connected to the rotating shaft I, and its lower end is connected to the pin II. When the tension spring is in a free state, the pressure rod rotates downward to the bottom dead center position.

[0020] The beneficial effects of this invention are as follows: During the rearward movement of the paper bag suction mechanism driven by the longitudinal moving mechanism, the linkage device drives the pressure rod upward. Then, the longitudinal moving mechanism drives the paper bag suction mechanism forward. Since the rear end of the paper bag is attracted and fixed by the paper bag suction mechanism, the paper bag gradually opens. Simultaneously, as the paper bag suction mechanism moves forward, the linkage device drives the pressure rod downward. This causes the bottom surface of the folded paper bag to be gradually pressed downward by the downward-moving pressure rod, flattening it into a horizontal state until the paper bag is fully opened and the bottom remains flat. The opening mechanism using a folded paper bag does not occupy the upper space of the paper bag, requires no separate power unit, and can easily and completely open the paper bag by relying on its back-and-forth movement, without affecting the suction force of the outer vacuum suction cup. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the bag-removing state of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the present invention in the opened state;

[0023] Figure 3 This is a three-dimensional structural diagram of the bag bottom pressing mechanism of the present invention;

[0024] Figure 4 This is a three-dimensional structural diagram of the upright plate portion of the present invention;

[0025] Figure 5 This is a schematic diagram of the paper bag of the present invention in a semi-open state;

[0026] Figure 6 This is a schematic diagram of the paper bag of the present invention in its fully open state;

[0027] Figure 7 This is a three-dimensional structural diagram of the paper bag of the present invention in its fully opened state;

[0028] In the diagram: 1. Base; 2. Frame; 3. Paper bag storage compartment; 4. Paper bag; 5. Linear module I; 6. Linear module II; 7. Vertical plate; 8. Vacuum suction cup I; 9. Vacuum suction cup II; 10. Rotating shaft I; 11. Gear; 12. Bracket; 13. Swing rod I; 14. Rotating shaft II; 15. Pressure rod; 16. Swing rod II; 17. Connecting rod; 18. Pin I; 19. Tension spring; 20. Pin II; 21. Rack. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 To be continued Figure 7 The present invention will be further described below.

[0030] As attached Figure 1 and attached Figure 2 As shown, a folding paper bag gripping and assisted full-opening mechanism includes: a base 1 with a frame 2 on its upper end, a paper bag storage compartment 3 in the frame 2, and several folded paper bags 4 stacked in the paper bag storage compartment 3, each paper bag 4 arranged vertically with its opening facing upwards, and the front end of the paper bag storage compartment 3 open; a paper bag suction mechanism mounted on a longitudinal movement mechanism, the longitudinal movement mechanism driving the paper bag suction mechanism to move in the front-back direction, and when the paper bag suction mechanism moves to the innermost end, it sucks up the front end of the outermost paper bag 4; a paper bag fixing suction mechanism, mounted on the frame 2, and located at the left or right end of the paper bag storage compartment 3; and a transverse movement mechanism mounted on the base 1. Used to drive the longitudinal movement mechanism to move horizontally in the left and right direction. When the paper bag suction mechanism moves the paper bag 4 it has sucked up to the paper bag fixing suction mechanism, the paper bag fixing suction mechanism sucks up the rear end face of the paper bag 4. The pressure rod 15 is set horizontally in the left and right direction and is installed on the frame 2 through the linkage device. When the paper bag suction mechanism moves horizontally to the paper bag fixing suction mechanism and moves backward, the paper bag suction mechanism drives the pressure rod 15 to move upward through the linkage device. When the paper bag fixing suction mechanism sucks up the rear end face of the paper bag 4 and the paper bag suction mechanism moves forward, the paper bag suction mechanism drives the pressure rod 15 to move downward through the linkage device to press down and flatten the bottom of the paper bag 4, which is in a folded state.

[0031] During operation, the transverse mechanism drives the paper bag suction mechanism to move directly opposite the paper bag storage bin 3. The longitudinal mechanism drives the paper bag suction mechanism to move backward. After the paper bag suction mechanism picks up the foremost paper bag 4 in the paper bag storage bin 3, the longitudinal mechanism drives the paper bag suction mechanism to move forward, thereby removing the paper bag 4 from the paper bag storage bin 3. Then, the transverse mechanism drives the paper bag suction mechanism to move in all directions to directly opposite the paper bag fixing suction mechanism. The longitudinal mechanism drives the paper bag suction mechanism to move backward until the paper bag fixing suction mechanism picks up the rear end of the paper bag 4. During the backward movement of the paper bag suction mechanism, the linkage device drives the pressure rod 15 to move upward. Then, the longitudinal mechanism drives the paper bag suction mechanism to move forward. Since the rear end of the paper bag 3 is attracted and fixed by the paper bag fixing suction mechanism, as shown in the attached... Figure 4 As shown, the paper bag 4 gradually opens. Simultaneously, the paper bag suction mechanism moves forward, and the linkage device drives the pressure rod 15 downwards. This causes the bottom surface of the paper bag 4, which is in a bent and folded state, to be gradually pressed downwards by the downward-moving pressure rod 15, flattening it into a horizontal state until it reaches the desired position. Figure 6 and attached Figure 7 As shown, the paper bag 4 is fully open and the bottom of the paper bag 4 remains flat. The opening mechanism of the folding paper bag does not occupy the upper space of the paper bag 4, has no separate power unit, and can easily and fully open the paper bag 4 by relying on the back and forth movement of the paper bag 4, without affecting the suction force of the vacuum suction cup on the outside.

[0032] After the paper bag 4 is fully unfolded, the paper bag suction mechanism and the paper bag fixing suction mechanism release their suction on the paper bag 4, allowing the unfolded paper bag 4 to be removed from the mechanism. The longitudinal movement mechanism drives the paper bag suction mechanism to move outward, and then the transverse movement mechanism drives the paper bag suction mechanism to move in the left and right direction to the paper bag storage compartment 3, so that the next round of bag opening can begin.

[0033] As attached Figure 4 As shown, in one embodiment of the present invention, the paper bag suction mechanism includes a vertical plate 7, with N vacuum suction cups I8 installed on the inner end of the vertical plate 7. The vacuum suction cups I8 can adhere to the front end face of the paper bag 4, allowing the paper bag 4 to be removed from the paper bag storage compartment 3 or delivered to the paper bag fixing and suction mechanism. In this embodiment, preferably, N is 4, and four vacuum suction cups I8 are installed at the four corners of the vertical plate 7, respectively used to suction the upper left, upper right, lower left, and lower right corners of the front end face of the paper bag 4. By setting four vacuum suction cups I8 to suction the upper left, upper right, lower left, and lower right corners of the front end face of the paper bag 4, not only is the suction and fixation firm, but the middle area of ​​the paper bag 4 also lacks mechanical mechanisms, preventing motion interference.

[0034] In one embodiment of the present invention, the lateral movement mechanism is a linear module I5 mounted on the base 1. The axis of the linear module I5 is horizontally arranged in the left-right direction, and the longitudinal movement mechanism is mounted on the slider of the linear module I5. The linear module I5 can drive the slider to move horizontally in the left-right direction. The linear module I5 is driven by a servo motor, thus enabling precise positioning of the slider and precise positioning of the lateral movement of the paper bag suction mechanism.

[0035] In one embodiment of the present invention, the longitudinal movement mechanism is a linear module II6, which is mounted on the slider of linear module I5. The axis of linear module II6 is horizontally arranged along the front-to-back direction, and the paper bag suction mechanism is mounted on the slider of linear module II6. Linear module II6 can drive the slider to move horizontally in the front-to-back direction. Linear module II6 is driven by a servo motor, thus enabling precise positioning of the slider and precise positioning of the longitudinal movement of the paper bag suction mechanism.

[0036] In one embodiment of the present invention, the paper bag fixing and suction mechanism consists of M vacuum suction cups II 9 mounted on the frame 2. The vacuum suction cups II 9 can conveniently adhere and fix the rear end face of the paper bag 4. In this embodiment, preferably, M is 2, with two vacuum suction cups II 9 respectively used to adhere to the upper left and upper right corners of the rear end face of the paper bag 4. Since the rear end face of the paper bag 4 is only adhered to its upper left and upper right corners, it will not interfere with the movement of the pressure rod 15 below.

[0037] As attached Figure 3As shown, in one embodiment of the present invention, the linkage device includes two supports 12 mounted on the frame 2. The two supports 12 are arranged in the front-back direction and are parallel to each other. A rocker arm I 13 is rotatably mounted on the inner end of the support 12 via a rotating shaft II 14. The left and right ends of the pressure rod 15 are respectively connected to the rear end of the rocker arm I 13 on the same side. A rotating shaft I 10 is rotatably mounted on one support 12. The axis of the rotating shaft I 10 is horizontally arranged in the left-right direction. A gear 11 is coaxially mounted on the head end of the rotating shaft I 10. A rocker arm II 16 is connected to the middle part of the rotating shaft I 10. A connecting rod 17 is hinged to the lower end of the rocker arm II 16 via a pin I 18. The lower end of the connecting rod 17 is hinged to the front end of the rocker arm I 13 via a pin II 20. A rack 21 is mounted on the side end of the upright plate 7. The rack 21 is horizontally arranged in the front-back direction. When the longitudinal transfer mechanism drives the paper bag suction mechanism to move backward relative to the paper bag fixed suction mechanism, the rack 21 meshes with the gear 11, and the gear 11 rotates clockwise. The rotation of the gear 11 drives the swing rod II 16 to rotate clockwise through the rotating shaft I 10. The swing rod II 16 drives the swing rod I 13 to rotate clockwise around the rotating shaft II 14 through the connecting rod 17. The swing rod I 13 drives the pressure rod 15 to move upward. At this time, the pressure rod 15 moves to the upper end of the paper bag 4 and is in the ready-to-work state. When the paper bag suction mechanism moves forward relative to the paper bag fixed suction mechanism, the rack 21 meshes with the gear 11, and the gear 11 rotates counterclockwise. The rotation of the gear 11 drives the swing arm II 16 to rotate counterclockwise through the rotating shaft I 10. The swing arm II 16 drives the swing arm I 13 to rotate counterclockwise around the rotating shaft II 14 through the connecting rod 17. The swing arm I 13 drives the pressure rod 15 to move downward. When the pressure rod 15 moves downward, it presses down and flattens the bottom of the paper bag 4, which is in a folded state at the rear end.

[0038] In one embodiment of the present invention, a tension spring 19 is also included. The upper end of the tension spring 19 is connected to the rotating shaft I 10, and its lower end is connected to the pin II 20. When the tension spring 19 is in a free state, the pressure rod 15 rotates downward to the bottom dead center position. When the pressure rod 15 moves upward, the tension spring 19 stretches and stores energy. When the paper bag 4 is fully unfolded and enters the next process, the tension spring 19 pulls the swing rod I 13 to rotate counterclockwise, causing the pressure rod 15 to move down to the initial position to meet the needs of the next process.

[0039] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gripping and assisted full-opening mechanism for folding paper bags, characterized in that, include: The base (1) has a frame (2) on its upper end. A paper bag storage compartment (3) is provided in the frame (2). Several folded paper bags (4) are stacked in the paper bag storage compartment (3). Each paper bag (4) is arranged vertically with its opening facing upwards. The front end of the paper bag storage compartment (3) is open. The paper bag suction mechanism is mounted on the longitudinal movement mechanism. The longitudinal movement mechanism drives the paper bag suction mechanism to move in the front-back direction. When the paper bag suction mechanism moves to the innermost end, it will suck up the front end of the outermost paper bag (4). The paper bag fixing and suction mechanism is set on the frame (2) and is located at the left or right end of the paper bag storage compartment (3); The transverse mechanism is set on the base (1) and is used to drive the longitudinal mechanism to move horizontally in the left and right directions. When the paper bag suction mechanism moves the paper bag (4) it has sucked to the paper bag fixed suction mechanism, the paper bag fixed suction mechanism sucks up the rear end face of the paper bag (4). The pressure bar (15) is set horizontally in the left and right direction and is installed on the frame (2) through the linkage device. When the paper bag suction mechanism moves horizontally to the paper bag fixed suction mechanism and moves backward, the paper bag suction mechanism drives the pressure bar (15) to move upward through the linkage device. When the paper bag fixed suction mechanism sucks up the rear end face of the paper bag (4), the paper bag suction mechanism moves forward and drives the pressure bar (15) to move downward through the linkage device to press down and flatten the bottom of the paper bag (4) which is folded at the rear end.

2. The gripping and auxiliary full-opening mechanism for folded paper bags according to claim 1, characterized in that: The paper bag suction mechanism includes a vertical plate (7), and N vacuum suction cups I (8) are installed on the inner end of the vertical plate (7).

3. The gripping and auxiliary full-opening mechanism for folded paper bags according to claim 1, characterized in that: The transverse movement mechanism is a linear module I (5) mounted on the base (1). The axis of the linear module I (5) is set horizontally in the left-right direction, and the longitudinal movement mechanism is mounted on the slider of the linear module I (5).

4. The gripping and auxiliary full-opening mechanism for folded paper bags according to claim 3, characterized in that: The longitudinal movement mechanism is a linear module II (6), which is mounted on the slider of the linear module I (5). The axis of the linear module II (6) is set horizontally along the front-back direction. The paper bag suction mechanism is mounted on the slider of the linear module II (6).

5. The gripping and auxiliary full-opening mechanism for folded paper bags according to claim 2, characterized in that: N is 4. Four vacuum suction cups I (8) are installed at the four corners of the upright plate (7) to adsorb the upper left, upper right, lower left and lower right corners of the front end of the paper bag (4).

6. The gripping and auxiliary full-opening mechanism for folded paper bags according to claim 1, characterized in that: The paper bag fixing and suction mechanism consists of M vacuum suction cups II (9) mounted on the frame (2).

7. The gripping and auxiliary full-opening mechanism for folded paper bags according to claim 6, characterized in that: M is set to 2, and two vacuum suction cups II (9) are used to adsorb the upper left and upper right corners of the rear end face of the paper bag (4), respectively.

8. The gripping and auxiliary full-opening mechanism for folded paper bags according to claim 2, characterized in that: The linkage device includes two supports (12) mounted on the frame (2). The two supports (12) are arranged in the front-back direction and are parallel to each other. The inner end of the support (12) is rotatably mounted with a rocker arm I (13) via a rotating shaft II (14). The left and right ends of the pressure rod (15) are respectively connected to the rear end of the rocker arm I (13) on the same side. A rotating shaft I (10) is rotatably mounted on one of the supports (12). The axis of the rotating shaft I (10) is horizontally arranged in the left-right direction. A gear (11) is coaxially mounted on the head end of the rotating shaft I (10). The middle part of the rotating shaft I (10) is connected to a rocker arm II (16). The lower end of the rocker arm II (16) is hinged by a pin I (18). A connecting rod (17) is connected. The lower end of the connecting rod (17) is hinged to the front end of the swing rod I (13) through a pin II (20). A rack (21) is installed on the side end of the upright plate (7). The rack (21) is horizontally arranged in the front-back direction. When the paper bag suction mechanism moves backward relative to the paper bag fixed suction mechanism, the rack (21) meshes with the gear (11). The gear (11) rotates clockwise, and the swing rod I (13) drives the pressure rod (15) to move upward. When the paper bag suction mechanism moves forward relative to the paper bag fixed suction mechanism, the rack (21) meshes with the gear (11). The gear (11) rotates counterclockwise, and the swing rod I (13) drives the pressure rod (15) to move downward.

9. The gripping and auxiliary full-opening mechanism for folded paper bags according to claim 8, characterized in that: It also includes a tension spring (19), the upper end of which is connected to the rotating shaft I (10), and the lower end of which is connected to the pin II (20). When the tension spring (19) is in a free state, the pressure rod (15) rotates downward to the lower dead center position.

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