Cover opening and closing device for bag-in-box

Abstract

The cover opening and closing device comprises a hollow shaft, a transmission shaft is concentrically installed in the hollow shaft, one end of the transmission shaft is connected with the output end of a grabbing air cylinder, meanwhile, the other end of the transmission shaft is connected with a clamping jaw mechanism, and the grabbing air cylinder drives the transmission shaft to do linear motion relative to the hollow shaft in the axial direction. Therefore, the clamping jaw mechanism clamps or loosens the box cover; a mounting plate is fixed to the outer circumferential face of the hollow shaft and drives the hollow shaft to do linear motion in the axial direction under the action of a linear driving module, so that the clamping jaw mechanism is driven to do linear motion in the axial direction, and then the cover is opened or closed through the clamping jaw mechanism. By arranging the linear driving module, the hollow shaft, the transmission shaft, the grabbing air cylinder and the clamping jaw mechanism, uncovering and covering operation can be automatically conducted on the bag-in-box, the working efficiency is effectively improved, materials in the bag-in-box can be effectively prevented from being polluted, and the product quality and safety are improved.

Description

Technical Field

[0001] This utility model relates to the field of food processing technology, and in particular to an opening and closing lid device for a bag-in-a-box. Background Technology

[0002] Bag-in-box packaging is used for packaging liquid materials such as fruit juice, wine, fruit juice beverages, mineral water, edible oil, food additives, industrial pharmaceuticals, medical reagents, liquid fertilizers, and pesticides. The bag-in-box structure consists of two parts: a lid and a bag body. The bag body cleverly utilizes a composite material of aluminized PET, LDPE, and nylon to enhance the packaging's barrier properties and durability, while the lid tightly seals the bag opening, ensuring the packaging's airtightness.

[0003] In existing technologies, when filling liquid materials into a bag-in-a-box, the lid needs to be manually removed from the bag before the bag is placed into a filling machine for filling. After filling, the lid is then manually reattached to the bag opening. This method is inefficient and consumes a lot of manpower and time. Furthermore, a sterile filling environment must be maintained during food filling. After filling, manually closing the bag at room temperature can easily lead to contamination of the material inside, making true aseptic sealing difficult and affecting product quality and safety. Utility Model Content

[0004] Therefore, it is necessary to provide a lid opening and closing device for a bag-in-a-box to address the problems of low work efficiency, high labor and time costs, and difficulty in guaranteeing product quality and safety caused by manual opening and closing of lids in the existing technology.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A box-in-bag opening and closing device includes a hollow shaft, inside which a drive shaft is concentrically mounted. One end of the drive shaft is connected to the output end of a gripping cylinder, and the other end of the drive shaft is connected to a gripper mechanism. The gripping cylinder drives the drive shaft to move linearly along the axial direction relative to the hollow shaft, thereby causing the gripper mechanism to clamp or release the box lid.

[0007] A mounting plate is fixed on the outer circumference of the hollow shaft. Under the action of the linear drive module, the mounting plate drives the hollow shaft to move linearly along the axial direction, thereby driving the gripper mechanism to move linearly along the axial direction, and then opening or closing the cover through the gripper mechanism.

[0008] As a further improvement to the above technical solution:

[0009] The gripper mechanism has the following structure: it includes several blades disposed on the outer circumferential surface of the transmission shaft, and a hook is hinged to each blade;

[0010] It also includes a mounting base fixed to one end of the hollow shaft, and a single hook is hinged to the mounting base;

[0011] When the drive shaft moves linearly along the axial direction relative to the hollow shaft, it drives the hook to rotate around the hinge point with the mounting base, thereby causing the gripper mechanism to clamp or release the box cover.

[0012] Each hook has a first hinge hole and a second hinge hole at its head end, and the tail end of each hook is bent and has an inwardly concave arc surface.

[0013] An oblong hole is provided on the end face of a single blade, and a first hinge shaft is installed in both the oblong hole and the corresponding first hinge hole, thereby realizing the hinge connection between the blade and the corresponding hook.

[0014] The side wall of the mounting base is provided with several U-shaped grooves evenly distributed along the circumference. Each U-shaped groove is provided with a corresponding hook claw, and a second hinge shaft is installed in each U-shaped groove.

[0015] A single hook is installed by engaging with a corresponding second hinge shaft through a second hinge hole, thereby achieving hinge connection between the hook and the mounting base.

[0016] A pressure block is fixed on the outer bottom wall of the mounting base. The pressure block is used to press the lid tightly into the bag opening when the lid is closed.

[0017] The linear drive module includes a first cylinder assembly fixed to a mounting plate and a second cylinder assembly connected to the output end of the first cylinder assembly.

[0018] The gripping cylinder is fixed to the top of the mounting plate.

[0019] A sleeve is fitted onto the outer circumference of the hollow shaft.

[0020] The other end of the hollow shaft is provided with a connecting flange, and the hollow shaft is installed by cooperating with the mounting plate through the connecting flange.

[0021] The beneficial effects of this utility model are as follows:

[0022] This utility model has a compact and reasonable structure and is easy to operate. By setting up a linear drive module, hollow shaft, transmission shaft, gripping cylinder and clamping mechanism, it can automatically open and close the lid of the bag in the box, effectively improving work efficiency and preventing the material inside the bag from being contaminated, thus improving product quality and safety.

[0023] This utility model also has the following advantages:

[0024] (1) By setting up a second cylinder assembly, the box cap is pressed into the corresponding bag opening after filling, thereby ensuring the sealing performance of the bag in the box.

[0025] (2) By setting an inwardly concave arc surface, it can fit against the cylindrical side wall of the bag opening, thereby improving the gripping stability of the gripper mechanism 8.

[0026] (3) By setting the oval hole, a small range of movement space can be provided for the corresponding first hinge shaft, thereby effectively avoiding the phenomenon of the hook getting stuck.

[0027] (4) By setting a pressure block, the lid can be pressed tightly inside the bag opening during the closing process. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] Figure 2 This is an exploded view of the present invention.

[0030] Figure 3 This is a full sectional view of the present invention.

[0031] Figure 4 This is a schematic diagram of the hook claw in this utility model.

[0032] Figure 5 This is a schematic diagram of the present invention in its working state.

[0033] The components include: 1. First cylinder assembly; 2. Second cylinder assembly; 3. Mounting plate; 4. Sleeve; 5. Hollow shaft; 6. Drive shaft; 7. Gripping cylinder; 8. Gripper mechanism; 9. Connecting flange; 10. Filling chamber; 11. Lateral movement cylinder; 12. Lateral movement seat; 13. Center hole; 14. Bag opening clamping mechanism; 15. Sensor assembly.

[0034] 801. Hook; 802. Mounting base; 803. First hinge shaft; 804. Second hinge shaft; 805. Blade; 806. U-shaped groove; 807. Oval hole; 808. Pressure block; 809. First hinge hole; 810. Second hinge hole; 811. Concave arc surface. Detailed Implementation

[0035] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0036] The structure and function of this utility model are as follows:

[0037] like Figures 1-5As shown, a box-in-bag opening and closing device includes a hollow shaft 5. A drive shaft 6 is concentrically mounted inside the hollow shaft 5. One end of the drive shaft 6 is connected to the output end of a gripping cylinder 7, while the other end is connected to a gripper mechanism 8. The gripping cylinder 7 drives the drive shaft 6 to move linearly along the axial direction relative to the hollow shaft 5, thereby causing the gripper mechanism 8 to clamp or release the box lid. A mounting plate 3 is fixedly mounted on the outer circumference of the hollow shaft 5. Under the action of a linear drive module, the mounting plate 3 drives the hollow shaft 5 to move linearly along the axial direction, thereby driving the gripper mechanism 8 to move linearly along the axial direction, and thus opening or closing the lid through the gripper mechanism 8. By setting up a linear drive module, hollow shaft 5, drive shaft 6, gripping cylinder 7, and gripper mechanism 8, the box-in-bag can be automatically opened and closed, effectively improving work efficiency and preventing contamination of the material inside the box-in-bag, thus improving product quality and safety.

[0038] The cap opening and closing device of this utility model is used on a filling machine, such as... Figure 5 As shown, the filling machine includes a filling chamber 10, which is hollow inside. A central hole 13 is opened on the bottom wall of the filling chamber 10. The central hole 13 is used for the bag opening (including the lid) of the bag-in-box to enter and exit the filling chamber 10. A transverse shift seat 12 is installed on the outer top wall of the filling chamber 10 through a guide rail assembly. The movement stability of the transverse shift seat 12 can be improved by setting the guide rail assembly. The opening and closing device of this utility model is installed on the transverse shift seat 12. The gripper mechanism 8, a portion of the hollow shaft 5, and the transmission shaft 6 extend into the filling chamber 1. The transverse shift seat 12 is connected to the output end of two symmetrically arranged transverse shift cylinders 11. The two transverse shift cylinders 11 are fixed to the top of the filling chamber 10. The transverse shift seat 12 moves linearly under the driving action of the two transverse shift cylinders 11, thereby driving the gripper mechanism 8 to move linearly in the horizontal direction, so that the gripper mechanism 8 can be aligned with the central hole 13. To ensure the smooth movement of the transverse sliding seat 12, a clearance hole is provided on the top plate end face of the filling chamber 10. The clearance hole is used to avoid the part of the opening and closing device located inside the cavity.

[0039] In addition, a filling mechanism is also installed on the transverse shift seat 12. The transverse shift seat 12 can drive the filling mechanism to move in a straight line in the horizontal direction, so that the working end of the filling mechanism can be aligned with the bag opening of the bag in the box, and then the bag in the box after the lid is opened can be filled.

[0040] Bag clamping mechanisms 14 are installed on opposite side walls of the filling chamber 10. The two bag clamping mechanisms 14 move in a straight line, either close to or far apart, to clamp or release the bag opening inside the filling chamber 10. By setting the bag clamping mechanism 14, the bag opening in the box can be clamped during opening, closing and filling, which effectively improves the stability of the equipment during operation.

[0041] A sensor assembly 15 is installed on the side wall of the filling chamber 10 to detect whether a lid is installed on the bag opening, thereby realizing automatic opening and closing of the lid.

[0042] An observation window is provided on the side wall of the filling chamber 10. A transparent baffle is installed inside the observation window. The transparent baffle is made of transparent plastic or transparent glass, so that the operator can easily observe the internal working conditions of the filling chamber 10.

[0043] In this invention, before filling a batch of materials, the filling chamber 10 is first sterilized. After sterilization and before filling, an appropriate amount of steam is introduced into the filling chamber 10 to maintain the temperature inside the chamber within a suitable range and maintain an appropriate positive pressure. At this time, the inside of the chamber is in a sterile state. Then, filling begins. During the filling process, steam is continuously introduced into the filling chamber 10 to maintain the sterile environment inside the filling chamber 10.

[0044] The gripper mechanism 8 has the following structure: it includes several blades 805 disposed on the outer circumferential surface of the drive shaft 6, with a hook 801 hinged to each blade 805; it also includes a mounting base 802 fixed to one end of the hollow shaft 5, with each hook 801 also hinged to the mounting base 802; when the drive shaft 6 moves linearly along the axial direction relative to the hollow shaft 5, it drives the hook 801 to rotate around the hinge point with the mounting base 802, thereby causing the gripper mechanism 8 to clamp or release the lid. By setting the gripper mechanism 8, the lid can be stably gripped, thus enabling automatic lid opening and closing.

[0045] Each individual claw 801 has a first hinge hole 809 and a second hinge hole 810 at its head end, and the tail end of each individual claw 801 is bent and has an inwardly concave arc surface 811. By providing the inwardly concave arc surface 811, it can fit against the cylindrical side wall of the bag opening, thereby improving the gripping stability of the claw mechanism 8.

[0046] An oblong hole 807 is provided on the end face of a single blade 805. A first hinge shaft 803 is installed in both the oblong hole 807 and the corresponding first hinge hole 809, thereby enabling the blade 805 to be hinged to the corresponding hook 801. By providing the oblong hole 807, a small range of movement space can be provided for the corresponding first hinge shaft 803, thereby effectively preventing the hook 801 from getting stuck.

[0047] Several U-shaped grooves 806 evenly distributed along the circumference are formed on the side wall of the mounting base 802. Each U-shaped groove 806 corresponds to a hook 801. A second hinge shaft 804 is fitted into each U-shaped groove 806. Each hook 801 is fitted into its corresponding second hinge shaft 804 through a second hinge hole 810, thus achieving hinge connection between the hook 801 and the mounting base 802. The U-shaped grooves 806 allow the hook 801 to extend.

[0048] A pressure block 808 is fixed on the outer bottom wall of the mounting base 802. The pressure block 808 is used to press the lid tightly into the bag opening when the lid is closed. The filling head device of this utility model is used to fill the bag-in-box. In the initial state, there is a gap of about 5mm between the lid and the bag opening, which facilitates the subsequent opening of the lid by the gripper mechanism 8. When closing the lid, it is necessary to eliminate the gap between the lid and the bag opening. The pressure block 808 is used to press the lid completely into the bag opening, thereby achieving a seal on the bag-in-box.

[0049] The linear drive module includes a first cylinder assembly 1 fixed on the mounting plate 3 and a second cylinder assembly 2 connected to the output end of the first cylinder assembly 1. The output end of the second cylinder assembly 2 is connected to the filling chamber 10, thereby driving the gripper mechanism 8 to move linearly in the vertical direction through the first cylinder assembly 1 and the second cylinder assembly 2, thereby moving closer to or away from the bag opening located in the central hole 13.

[0050] The first cylinder assembly 1 includes two first cylinders symmetrically arranged relative to the hollow shaft 5, and the second cylinder assembly 2 includes two second cylinders symmetrically arranged relative to the hollow shaft 5. The piston rod stroke of the second cylinder is greater than that of the first cylinder. The piston rod stroke of the first cylinder is about 5mm. Thus, during the closing process, the pressure block 808 is driven to press the lid down and press it tightly into the bag opening to ensure the sealing performance of the bag in the box.

[0051] The gripping cylinder 7 is fixed to the top of the mounting plate 3. The gripping cylinder 7 drives the transmission shaft 6 to make linear motion, thereby causing the hook 801 to rotate relative to the corresponding second hinge shaft 804, which in turn causes the gripper mechanism 8 to clamp or release the box cover.

[0052] A sleeve 4 is fitted onto the outer circumference of the hollow shaft 5. The sleeve 4 is fixed to the top of the filling chamber 10, and a sealing ring assembly is fitted between the inner wall of the sleeve 4 and the outer wall of the hollow shaft 5 to prevent external dust and foreign objects from entering the filling chamber 10, thereby maintaining a sterile environment inside the filling chamber 10.

[0053] The other end of the hollow shaft 5 is provided with a connecting flange 9, and the hollow shaft 5 is installed with the mounting plate 3 through the connecting flange 9. By providing the connecting flange 9, a stable connection between the hollow shaft 5 and the mounting plate 3 can be achieved.

[0054] The working process of this utility model is as follows:

[0055] When the bag-in-box needs to be opened, the horizontal moving base 12 is first driven by the horizontal moving cylinder 11 to move linearly in the horizontal direction, so that the gripper mechanism 8 is aligned with the bag opening (at this time, the bag opening is equipped with the bag lid). Then the second cylinder assembly 2 retracts, thereby driving the gripper mechanism 8 to move linearly downward in the vertical direction. After it has descended to the position, the gripping cylinder 7 retracts, thereby driving the hook 801 to rotate through the transmission shaft 6, so that the gripper mechanism 8 clamps the bag lid. Then the second cylinder assembly 2 extends, thereby pulling the bag lid out of the bag opening through the gripper mechanism 8. Subsequently, the bag-in-box is filled by the filling mechanism. Before filling, the horizontal moving base 12 needs to be driven by the horizontal moving cylinder 11 to move linearly in the horizontal direction, so that the opening and closing device moves away from directly above the central hole 13, so that the filling mechanism can move directly above the bag opening for filling operation.

[0056] After filling, the bag in the box is closed. First, the horizontal moving cylinder 11 drives the horizontal moving seat 12 to move linearly in the horizontal direction, which drives the opening and closing device back to the center hole 13. Then, the second cylinder assembly 2 retracts, thereby driving the gripper mechanism 8 to move linearly downward in the vertical direction, and then placing the box cover gripped by the gripper mechanism 8 into the bag opening. Next, the gripping cylinder 7 extends, thereby driving the hook 801 to rotate through the transmission shaft 6, which causes the gripper mechanism 8 to release the box cover. Then, the first cylinder assembly 1 extends, thereby driving the gripper mechanism 8 to move linearly downward in the vertical direction, and then pressing the box cover into the bag opening through the pressure block 808 to achieve the sealing of the packaging bag. Finally, the second cylinder assembly 2 extends, the opening and closing device resets, and the box cover is closed.

[0057] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A lid opening and closing device for a bag-in-a-box, characterized in that: Includes a hollow shaft (5), inside which a drive shaft (6) is concentrically mounted. One end of the drive shaft (6) is connected to the output end of a gripping cylinder (7), and the other end of the drive shaft (6) is connected to a gripper mechanism (8). The gripping cylinder (7) drives the drive shaft (6) to move linearly along the axial direction relative to the hollow shaft (5), thereby causing the gripper mechanism (8) to clamp or release the box cover. The mounting plate (3) is fixed on the outer circumference of the hollow shaft (5). Under the action of the linear drive module, the mounting plate (3) drives the hollow shaft (5) to move linearly along the axial direction, thereby driving the gripper mechanism (8) to move linearly along the axial direction, and then opening or closing the cover through the gripper mechanism (8).

2. The opening and closing lid device for a bag-in-a-box as described in claim 1, characterized in that: The structure of the gripper mechanism (8) is as follows: it includes several blades (805) disposed on the outer circumferential surface of the transmission shaft (6), and a hook (801) is hinged on a single blade (805); It also includes a mounting base (802) fixed to one end of the hollow shaft (5), and a single hook (801) is also hinged to the mounting base (802); When the drive shaft (6) moves linearly along the axial direction relative to the hollow shaft (5), it drives the hook (801) to rotate around the hinge point with the mounting base (802), thereby causing the gripper mechanism (8) to clamp or release the box cover.

3. The opening and closing lid device for a bag-in-a-box as described in claim 2, characterized in that: The head end of a single hook (801) is provided with a first hinge hole (809) and a second hinge hole (810), and the tail end of a single hook (801) is bent and provided with an inwardly concave arc surface (811).

4. The opening and closing lid device for a bag-in-a-box as described in claim 3, characterized in that: An oblong hole (807) is provided on the end face of a single blade (805). A first hinge shaft (803) is installed in both the oblong hole (807) and the corresponding first hinge hole (809), thereby realizing the hinge connection between the blade (805) and the corresponding hook (801).

5. The opening and closing lid device for a bag-in-a-box as described in claim 3, characterized in that: The mounting base (802) has several U-shaped grooves (806) evenly distributed along the circumference on its side wall surface. The U-shaped grooves (806) are arranged in a one-to-one correspondence with the hooks (801). A second hinge shaft (804) is installed in each U-shaped groove (806). A single hook (801) is installed by engaging with the corresponding second hinge shaft (804) through the second hinge hole (810), thereby achieving the hinge connection between the hook (801) and the mounting base (802).

6. The opening and closing lid device for a bag-in-a-box as described in claim 2, characterized in that: A pressure block (808) is fixed on the outer bottom wall of the mounting base (802). The pressure block (808) is used to press the lid tightly into the bag opening when the lid is closed.

7. The opening and closing lid device for a bag-in-a-box as described in claim 1, characterized in that: The linear drive module includes a first cylinder assembly (1) fixed on the mounting plate (3) and a second cylinder assembly (2) connected to the output end of the first cylinder assembly (1).

8. The opening and closing lid device for a bag-in-a-box as described in claim 1, characterized in that: The gripping cylinder (7) is fixed to the top of the mounting plate (3).

9. The opening and closing lid device for a bag-in-a-box as described in claim 1, characterized in that: A sleeve (4) is fitted onto the outer circumference of the hollow shaft (5).

10. The opening and closing lid device for a bag-in-a-box as described in claim 1, characterized in that: The other end of the hollow shaft (5) is provided with a connecting flange (9), and the hollow shaft (5) is installed with the mounting plate (3) through the connecting flange (9).

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