Folding mechanism, packaging bag strapping device and packaging bag folding method

Abstract

The present invention provides a folding mechanism, a packaging bag strapping device, and a packaging bag folding method, relating to the technical field of packaging bag strapping. The folding mechanism provided by the present invention includes: a base, a stacking rack, a pressing member, and a stacking drive member; the pressing member is arranged opposite the base and is used to press and fix the packaging bag on the base; the stacking drive member is transmission-connected to the stacking rack; the stacking drive member is used to drive the stacking rack to move relative to the base to fold the packaging bag. The folding mechanism, packaging bag strapping device, and packaging bag folding method provided by the present invention use the stacking drive member to drive the stacking rack to move relative to the base, thereby folding the packaging bag. During the folding process, the pressing member can press and fix the packaging bag, thereby avoiding the technical problem of the packaging bag being misplaced and scattered.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging bag bundling, and in particular to a folding mechanism, a packaging bag bundling device and a packaging bag folding method. Background Art

[0002] After production, packaging bags such as courier bags, vest bags, and supermarket bags typically need to be folded or curled before being bundled. During the folding process, the bags can easily become misaligned, leading to disarray. Furthermore, rubber bands are often used to tie the bags together. These bands can age during storage, causing the bundled bags to fall apart. Aged rubber bands can also stick to the bags, causing problems for users. Summary of the Invention

[0003] The object of the present invention is to provide a folding mechanism, a packaging bag bundling device and a packaging bag folding method, which can realize the compression and folding of the packaging bag and alleviate the technical problems of dislocation and scattering of the packaging bag.

[0004] In a first aspect, the present invention provides a folding mechanism comprising: a base, a stacking frame, a pressing member, and a stacking drive member;

[0005] The pressing member is arranged opposite to the base, and is used to press and fix the packaging bag on the base;

[0006] The stacking drive device is in driving connection with the stacking frame;

[0007] The stacking drive device is used to drive the stacking frame to move relative to the base to fold the packaging bag.

[0008] In combination with the first aspect, the present invention provides a first possible implementation of the first aspect, wherein the stacking rack includes: a first plate, a material clamp, and a clamping drive member;

[0009] The stacking drive device is in driving connection with the first plate;

[0010] The material clamp is movably connected to the first plate, and the material clamp is transmission-connected to the clamping drive member.

[0011] In combination with the first possible implementation of the first aspect, the present invention provides a second possible implementation of the first aspect, wherein the first plate is provided with a first notch, and the first notch is arranged opposite to the pressing member.

[0012] In combination with the second possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein a second plate is mounted on the first plate, and a stacking opening is formed between the second plate and the first plate.

[0013] In combination with the third possible implementation of the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein a second notch opposite to the first notch is provided on the second plate.

[0014] In combination with the third possible implementation of the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein a first clearance groove is provided on the second plate, and the first clearance groove is used to make way for the material clamp.

[0015] In combination with the first possible implementation of the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein a second clearance groove is provided on the base, and the second clearance groove is used to make way for the material clamp.

[0016] In a second aspect, the packaging bag bundling device provided by the present invention comprises: a feeding mechanism, a bundling mechanism and the folding mechanism provided in the first aspect; the feeding mechanism is used to convey the packaging bag to the base; the bundling mechanism is installed below the folding mechanism.

[0017] In combination with the second aspect, the present invention provides a first possible implementation manner of the second aspect, wherein the loading mechanism includes: a material preparation carrier and a material clamping and conveying member, wherein the material clamping and conveying member is installed between the material preparation carrier and the base;

[0018] The material preparation carrier is used to store the packaging bags, and the material clamping and conveying member is used to convey the packaging bags from the material preparation carrier to the base.

[0019] In combination with the first possible implementation of the second aspect, the present invention provides a second possible implementation of the second aspect, wherein the material preparation carrier includes: a support plate, a material stopper, and a vibration generator;

[0020] The support plate has a material storage area for storing the packaging bags, the material blocking member is located between the material storage area and the material clamping and conveying member, and the material blocking member is connected to the vibration generator.

[0021] In combination with the second possible implementation of the second aspect, the present invention provides a third possible implementation of the second aspect, wherein the support plate is hingedly mounted on the support frame, and the support plate is transmission-connected to the deflection drive member;

[0022] The deflection driving member is used to drive the support plate to switch between an inclined state and a horizontal state;

[0023] In the tilted state, the support plate tilts downward from an end away from the material-gripping conveying member to an end close to the material-gripping conveying member;

[0024] In the flat state, the surface of the support plate is horizontal.

[0025] In combination with the third possible implementation manner of the second aspect, the present invention provides a fourth possible implementation manner of the second aspect, wherein a slot is provided on the support plate, and the slot is arranged opposite to the clamping claw of the material clamping and conveying member;

[0026] In the tilted state, the material blocking member passes through the slot from bottom to top;

[0027] In the flat state, the material blocking member is located below the supporting plate.

[0028] In combination with the second aspect, the present invention provides a fifth possible implementation of the second aspect, wherein the bundling mechanism includes: a bundling bracket, a bundling clamping member, and a tether member;

[0029] The strapping clamp is installed above the strapping bracket, and the strapping clamp is used to press the packaging bag onto the strapping bracket;

[0030] The tying rope member is installed on the strapping bracket, and the tying rope member is used to tie the rope member to the packaging bag.

[0031] In combination with the fifth possible implementation of the second aspect, the present invention provides a sixth possible implementation of the second aspect, wherein a material moving device is installed on the strapping bracket, and the material moving device is used to transfer the packaging bag from the strapping bracket to the unloading device.

[0032] In a third aspect, the packaging bag folding method provided by the present invention adopts the folding mechanism in the above embodiment and includes the following steps:

[0033] Placing the packaging bag on the base, and extending the first folded section of the packaging bag toward the stacking rack to beyond the bearing end surface of the base;

[0034] Pressing and fixing the packaging bag on the base by the pressing member;

[0035] The stacking frame is moved to the top of the first folding section by the stacking driving device, and then the stacking frame is pressed down by the first folding section, and then the stacking frame pushes the first folding section to bend to the bottom of the base;

[0036] Manipulating the pressing member to release the packaging bag;

[0037] The first folding segment and the second folding segment located above the first folding segment are clamped by the stacking frame;

[0038] The stacking frame is driven by the stacking driving device to move in a direction away from the base until the third folding section of the packaging bag is separated from the base, so that the third folding section is bent downward;

[0039] The stacking drive device is controlled to drive the stacking frame to rise and translate to above the base. During the process, the base pushes the third folding section to bend to below the first folding section.

[0040] In combination with the third aspect, the present invention provides a first possible implementation of the third aspect, wherein the packaging bag folding method further includes:

[0041] When the third folding segment is bent to the bottom of the first folding segment, the second folding segment, the first folding segment and the third folding segment are clamped between the pressing member and the base by the pressing member;

[0042] Controlling the stacking drive device to drive the stacking frame to move, and causing the stacking frame to bend the packaging bag extending beyond the bearing end surface of the base to below the base;

[0043] The pressing member is operated to release the packaging bag, and the packaging bag is clamped by the stacking rack to keep the packaging bag in a folded state.

[0044] The embodiments of the present invention bring the following beneficial effects: a pressing member is arranged relative to the base, and the packaging bag is pressed and fixed on the base by the pressing member; the stacking drive device is transmission-connected to the stacking rack, and the stacking rack is driven to move relative to the base by the stacking drive device, thereby folding the packaging bag; during the folding process, the pressing member can press and fix the packaging bag, thereby avoiding the technical problem of dislocation and scattering of the packaging bag.

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 Schematic diagram of the folding mechanism and packaging bag provided in an embodiment of the present invention when bending to form the first folding section Figure 1 ;

[0048] Figure 2Schematic diagram of the folding mechanism and packaging bag provided in an embodiment of the present invention when bending to form the first folding section Figure 2 ;

[0049] Figure 3 A schematic diagram of the folding mechanism and the packaging bag provided in an embodiment of the present invention when being bent to form a first folding section and a second folding section;

[0050] Figure 4 A schematic diagram of the folding mechanism and packaging bag provided in an embodiment of the present invention when being bent to form a first folding section, a second folding section, and a third folding section;

[0051] Figure 5 A schematic diagram of a folding mechanism provided by an embodiment of the present invention, in which a base and a pressing member jointly clamp a first folding segment, a second folding segment, and a third folding segment;

[0052] Figure 6 A schematic diagram of a folding mechanism and a folded packaging bag provided by an embodiment of the present invention;

[0053] Figure 7 A schematic diagram of a packaging bag strapping device provided in an embodiment of the present invention;

[0054] Figure 8 A schematic diagram of a packaging bag and a loading mechanism of a packaging bag bundling device provided in an embodiment of the present invention;

[0055] Figure 9 A schematic diagram of a stacking frame, a stacking drive device, and a strapping mechanism of a packaging bag strapping device provided in an embodiment of the present invention;

[0056] Figure 10 A schematic diagram of a bundling mechanism and packaging bags of a packaging bag bundling device provided in an embodiment of the present invention;

[0057] Figure 11 A schematic diagram of the bundling mechanism of the packaging bag bundling device provided in an embodiment of the present invention.

[0058] Icons: 001-base; 101-second clearance slot; 002-stack rack; 201-stack opening; 021-first plate; 211-first slot; 022-clip; 023-clamping drive; 024-second plate; 241-second slot; 242-first clearance slot; 003-pressing member; 004-stack drive; 401-translational drive; 402-lifting drive; 005-packaging bag; 501-first folding section; 502-second folding section; 503-third folding section; 006-upper Material mechanism; 061-material preparation carrier; 611-support plate; 612-material blocking member; 613-vibration generator; 614-support frame; 615-deflection drive member; 616-slot; 617-limiting member; 062-material clamping and conveying member; 007-bundling mechanism; 071-bundling bracket; 072-bundling clamping member; 073-tethering member; 731-rope winding arm; 732-rope winding column; 733-tethering hook; 074-material moving device; 741-material pushing baffle; 742-guide rail; 008-material unloading device; 801-material pushing member. DETAILED DESCRIPTION

[0059] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0060] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, unless separately marked, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0061] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0062] Example 1

[0063] like Figure 1 and Figure 2 As shown, the folding mechanism provided by the embodiment of the present invention includes: a base 001, a stacking rack 002, a pressing member 003 and a stacking drive device 004; the pressing member 003 is arranged opposite to the base 001, and the pressing member 003 is used to press and fix the packaging bag 005 on the base 001; the stacking drive device 004 is transmission-connected to the stacking rack 002; the stacking drive device 004 is used to drive the stacking rack 002 to move relative to the base 001 to fold the packaging bag 005.

[0064] Specifically, the pressing element 003 comprises a telescopic cylinder mounted on a frame and a pressure head mounted on the movable end of the telescopic cylinder. The telescopic cylinder drives the pressure head to move. When the pressure head approaches the base 001, the stacked bags 005 are compressed between the base 001 and the pressure head, thereby securing the bags 005 and preventing the bags from misaligning and becoming scattered during the folding process. Furthermore, the stacking drive element 004 drives the stacking rack 002 relative to the base 001, allowing the stacking rack 002 to push, clamp, and support the bags, thereby enabling the bags 005 to be folded.

[0065] It should be noted that the stacking drive 004 comprises a translation drive 401 and a lift drive 402. The translation drive 401 comprises a reduction motor and a transmission belt connected to the reduction motor. The transmission belt is connected to the stacking frame 002, thereby driving the stacking frame 002 to move back and forth horizontally. Furthermore, the frame is mounted with transverse slides, along which the transverse slides slide. The transverse slides are mounted with longitudinal slides, along which the stacking frame 002 is slidably connected. The lift drive 402 utilizes a screw drive to drive the stacking frame 002 up and down.

[0066] In an embodiment of the present invention, the stacking rack 002 includes: a first plate 021, a material clamp 022 and a clamping drive 023; the stacking drive 004 is transmission-connected to the first plate 021; the material clamp 022 is movably connected to the first plate 021, and the material clamp 022 is transmission-connected to the clamping drive 023.

[0067] Specifically, the material clamp 022 is hinged to the first plate 021, and the clamping drive 023 is a pneumatic or hydraulic cylinder, and the clamping drive 023 is in transmission connection with the material clamp 022. A clamping zone is formed between the material clamp 022 and the first plate 021, and the clamping drive 023 drives the material clamp 022, thereby realizing the opening and closing of the clamping zone.

[0068] like Figure 1 As shown, the first plate 021 is provided with a first notch 211, which is positioned opposite the pressing member 003. When the stacking rack 002 moves above the base 001, the packaging bag 005 is folded under the combined action of the stacking rack 002 and the base 001. The pressing member 003 passes through the first notch 211 and presses and secures the packaging bag 005 to the base 001. The stacking drive 004 then drives the stacking rack 002 to translate away from above the base 001.

[0069] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 and Figure 6 As shown, the second plate 024 is mounted on the first plate 021 , and a stacking opening 201 is formed between the second plate 024 and the first plate 021 .

[0070] Specifically, in the plumb direction, the second plate 024 is projected onto the first plate 021. In the initial state, the first plate 021 is located below the base 001, and the second plate 024 is flush with and connected to the base 001. The second plate 024 and the base 001 jointly support the packaging bag 005 to be folded. Figure 1 and Figure 2 When the translation driving device 401 drives the stacking rack 002 to move away from the base 001, the first folding section 501 extending outside the base 001 sags under the action of gravity.

[0071] like Figure 6 As shown, when the first plate 021 moves to the bottom of the base 001, the second plate 024 is located above the base 001. At this time, the base 001 will push against the packaging bag 005, causing the packaging bag 005 to have a crease along the edge of the base 001, and then folded in the stacking port 201.

[0072] like Figure 1 As shown, the second plate 024 is provided with a second notch 241 opposite to the first notch 211. When the first plate 021 is moved above the base 001 to fold the packaging bag 005, the pressing member 003 can pass through the second notch 241 and the first notch 211 and abut against the packaging bag 005, thereby pressing the folded packaging bag 005 between the base 001 and the pressing member 003.

[0073] In addition, the second plate 024 is provided with a first clearance groove 242 for making way for the material clamp 022. When the clamping driver 023 drives the material clamp 022 to switch to the open state, the material clamp 022 passes through the first clearance groove 242 and rises, so that the packaging bag 005 between the first plate 021 and the second plate 024 can enter the clamping area of ​​the material clamp 022. When the clamping driver 023 drives the material clamp 022 to switch to the closed state, the packaging bag 005 between the first plate 021 and the second plate 024 will be clamped between the first plate 021 and the material clamp 022.

[0074] like Figure 3 and Figure 6 As shown, a second paving groove 101 is provided on the base 001 , and the second paving groove 101 is used to paving the material clamp 022 .

[0075] When the stacking drive 004 drives the stacking frame 002 to translate until the base 001 is inserted into the stacking opening 201, the packaging bag 005 is creased along the edge of the base 001, thereby folding within the stacking opening 201. Subsequently, the clamping drive 023 drives the clamp 022 to switch to a closed state, thereby clamping the packaging bag 005. While the clamp 022 is clamping the packaging bag 005, the second clearance groove 101 clears the clamp 022, preventing the clamp 022 from applying its clamping force to the base 001. The stacking drive 004 then drives the stacking frame 002 and the folded packaging bag 005 to move synchronously.

[0076] Example 2

[0077] like Figure 1 and Figure 7 As shown, the packaging bag bundling device provided by the embodiment of the present invention includes: a feeding mechanism 006, a bundling mechanism 007 and the folding mechanism provided in the first embodiment; the feeding mechanism 006 is used to convey the packaging bag 005 to the base 001; the bundling mechanism 007 is installed below the folding mechanism.

[0078] Specifically, the feeding mechanism 006 uses a conveyor belt or a robot to transport the packaging bag 005 to the base 001, and the bundling mechanism 007 is used to wind the PE plastic rope around the folded packaging bag 005 and bundle the folded packaging bag 005 by tying knots.

[0079] In an embodiment of the present invention, the loading mechanism 006 includes: a material preparation carrier 061 and a material clamping and conveying member 062, and the material clamping and conveying member 062 is installed between the material preparation carrier 061 and the base 001; the material preparation carrier 061 is used to store the packaging bag 005, and the material clamping and conveying member 062 is used to convey the packaging bag 005 from the material preparation carrier 061 to the base 001.

[0080] Specifically, the material-gripping conveyor 062 comprises a clamping arm and a belt drive connected to the clamping arm. The belt drive utilizes a motor-driven synchronous belt to drive the clamping arm's translational movement along a slide rail. Once the clamping arm grasps the packaging bag 005, the belt drive drives the clamping arm and the packaging bag 005 to move synchronously, allowing the packaging bag 005 to be moved from the material carrier 061 to the base 001.

[0081] like Figure 8 As shown, the material preparation carrier 061 includes: a support plate 611, a material blocking member 612 and a vibration generator 613; the support plate 611 has a material storage area for storing packaging bags 005, the material blocking member 612 is located between the material storage area and the material clamping conveyor 062, and the material blocking member 612 is connected to the vibration generator 613.

[0082] Specifically, the vibration generator 613 generates vibration and transmits the vibration to the stopper 612 . When the stopper 612 vibrates, the stopper 612 contacts the side of the packaging bag 005 , thereby aligning the stacked packaging bags 005 along the stopper 612 .

[0083] Furthermore, the pallet 611 is hingedly mounted on the support frame 614, and the pallet 611 is transmission-connected to the deflection drive member 615; the deflection drive member 615 is used to drive the pallet 611 to switch between an inclined state and a horizontal state; in the inclined state, the pallet 611 tilts downward from the end away from the material clamping conveyor 062 to the end close to the material clamping conveyor 062; in the horizontal state, the surface of the pallet 611 is horizontal.

[0084] In one embodiment, the deflection driving member 615 is a servo, which is connected to the support plate 611 via the servo, thereby driving the support plate 611 to swing, so as to achieve reciprocating switching of the support plate 611 between the tilted state and the flat state.

[0085] In this embodiment, the deflection drive member 615 is a pneumatic cylinder, the movable end of which is hinged to the support plate 611. The cylinder's extension and retraction drive the support plate 611 to swing, thereby changing the tilt angle of the support plate 611. In the tilted state, the packaging bags 005 slide down under the action of gravity until they abut against the material stop 612, ensuring that the packaging bags 005 contact the material stop 612. The vibrating material stop 612 can align multiple packaging bags 005.

[0086] like Figure 7 and Figure 8 As shown, multiple packaging bags 005 are aligned along the material blocking member 612 in the direction close to the clamping conveyor 062, so that the clamping conveyor 062 can clamp the stacked multiple packaging bags 005 at the same time to avoid individual packaging bags 005 being missed during clamping.

[0087] In addition, two limiting members 617 are installed on the pallet 611, and the storage area is located between the two limiting members 617. The packaging bags 005 located in the storage area can slide between the two limiting members 617 toward the direction of the blocking member 612, thereby ensuring that the multiple packaging bags 005 stacked together form a neat stack.

[0088] Furthermore, the support plate 611 is provided with a slot 616, which is arranged opposite to the clamping claw of the material-gripping conveyor 062. In the tilted state, the material-blocking member 612 passes through the slot 616 from bottom to top. At this time, the packaging bags 005 slide downward to abut the material-blocking member 612, thereby aligning the multiple packaging bags 005 along the material-blocking member 612. In the flat state, the material-blocking member 612 is located below the support plate 611. At this time, the clamping claw of the clamping arm of the material-gripping conveyor 062 can be inserted into the slot 616 and enter under the packaging bag 005, so that the clamping arm can clamp the packaging bag 005 placed on the support plate 611.

[0089] like Figure 1 and Figure 7 As shown, after the packaging bag 005 is folded, the stacking drive device 004 can drive the stacking rack 002 to transfer the folded packaging bag 005 to the strapping mechanism 007.

[0090] In one embodiment, the bundling mechanism 007 is used to expand the rubber band and put the expanded rubber band on the packaging bag 005, so as to bundle the packaging bag 005 with the rubber band.

[0091] like Figure 1 、 Figure 7 、 Figure 9 、 Figure 10 and Figure 11 As shown, in this embodiment, the bundling mechanism 007 includes: a bundling bracket 071, a bundling clamping member 072 and a tying member 073; the bundling clamping member 072 is installed above the bundling bracket 071, and the packaging bag 005 is pressed against the bundling bracket 071 through the bundling clamping member 072; the tying member 073 is installed on the bundling bracket 071, and the rope member is tied to the packaging bag 005 through the tying member 073.

[0092] Specifically, the strapping clamp 072 includes a pressure rod and a lifting drive cylinder that drives the pressure rod. The tethering member 073 includes a rope winding arm 731, a rope winding post 732, and a rope hook 733. The rope winding arm 731 is driven by a lifting cylinder and a translation cylinder. In the initial state, the rope on the strapping mechanism 007 is tensioned between the rope winding arm 731 and the rope winding post 732, and the rope extends in the direction of the plumb bob. When the stacking drive 004 drives the stacking rack 002 to move and move the packaging bag 005 onto the strapping bracket 071, the packaging bag 005 pushes against the rope, causing the rope to partially wrap around the bag. Subsequently, the lifting drive cylinder drives the pressure rod downward, and the pressure rod passes through the second notch 241 and the first notch 211, pressing the packaging bag 005 between the pressure rod and the base 001. After the packaging bag 005 is clamped and secured by the strapping clamp 072, the stacking frame 002 releases the packaging bag 005, and the stacking drive 004 drives the stacking frame 002 to move and return to its initial position. The lifting cylinder and the translation cylinder respectively drive the rope winding arm 731 to move. The rope winding arm 731 winds one end of the rope around the rope winding post 732. The rope driving member drives the rope hook 733 to hook the rope and tie a knot. Simultaneously, the rope that has not yet been tied to the packaging bag 005 is pulled and tensioned between the rope winding arm 731 and the rope winding post 732, thereby returning the rope winding arm 731 and the rope winding post 732 to their initial position. The rope hook 733 hooks the rope and, by winding, clamping, and pulling one end of the rope, ties the rope into a slipknot. Various knotting methods and the movement of the rope hook 733 exist in the prior art and will not be detailed here.

[0093] Furthermore, bundled bags 005 can be transported to the unloading device 008 by the material transfer device 074. The material transfer device 074 includes a pusher plate 741 and a guide rail 742. The pusher plate 741 is mounted on a pusher slider, which is slidably connected to the guide rail 742. A pneumatic cylinder or an electric motor can be used to power the pusher slider along the guide rail 742. After the bags 005 are bundled, the pusher plate 741 is driven to slide along the guide rail 742, thereby pushing the bundled bags 005 to the unloading device 008. The pusher 801 includes a telescopic cylinder and a push plate connected to the movable end of the telescopic cylinder. The pusher 801 can drive the bags to translate along the supporting surface of the unloading device 008, thereby placing multiple bundles of bags 005 evenly on the unloading device 008.

[0094] Example 3

[0095] like Figure 1 and Figure 2As shown, the packaging bag folding method provided by an embodiment of the present invention adopts the folding mechanism provided by the above-mentioned embodiment, and includes the following steps: placing the packaging bag 005 on the base 001, and extending the first folding section 501 of the packaging bag 005 in the direction close to the stacking rack 002 to outside the load-bearing end surface of the base 001; and pressing and fixing the packaging bag 005 on the base 001 by the pressing member 003.

[0096] The stacking drive device 004 moves the stacking rack 002 to the top of the first folding section 501, and then the stacking rack 002 presses down the first folding section 501, and then the stacking rack 002 pushes the first folding section 501 to bend to the bottom of the base 001;

[0097] like Figure 3 As shown, the pressing member 003 is operated to release the packaging bag 005; the first folding segment 501 and the second folding segment 502 located above the first folding segment 501 are clamped by the stacking rack 002; the stacking driving device 004 drives the stacking rack 002 to move away from the base 001 until the third folding segment 503 of the packaging bag 005 is separated from the base 001, so that the third folding segment 503 is bent downward.

[0098] like Figure 4 As shown, the stacking drive device 004 is controlled to drive the stacking rack 002 to rise and translate to above the base 001 . During the process, the base 001 pushes the third folding segment 503 to bend to below the first folding segment 501 .

[0099] like Figure 3 and Figure 5 As shown, in this embodiment, the packaging bag folding method further includes:

[0100] When the third folding section 503 is bent to the bottom of the first folding section 501, the second folding section 502, the first folding section 501 and the third folding section 503 are clamped between the pressing member 003 and the base 001 by the pressing member 003; the stacking driving device 004 is controlled to drive the stacking rack 002 to move, and the stacking rack 002 bends the packaging bag 005 extending beyond the bearing end surface of the base 001 to the bottom of the base 001; when the stacking rack 002 releases the packaging bag 005, the packaging bag 005 extending beyond the bearing end surface of the base 001 is bent downward under the action of gravity to form Figure 5 Subsequently, the stacking drive device 004 drives the stacking rack 002 to push the downwardly bent portion of the packaging bag 005 to fold to the bottom of the base 001 to form a Figure 6 Shown in folded state.

[0101] Subsequently, the pressing member 003 is operated to release the packaging bag 005, and the packaging bag 005 is clamped by the stacking rack 002 to keep the packaging bag 005 in a folded state. Thereafter, the stacking rack 002 is driven to move by the stacking driving member 004, so that the folded packaging bag 005 can be transferred and transported.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A folding mechanism, characterized in that: include: A base (001), a stacking frame (002), a pressing member (003) and a stacking driving member (004); The pressing member (003) is arranged opposite to the base (001), and the pressing member (003) is used to press and fix the packaging bag (005) on the base (001); The stacking drive device (004) is in transmission connection with the stacking frame (002); The stacking drive device (004) is used to drive the stacking frame (002) to move relative to the base (001) to fold the packaging bag (005); The stacking frame (002) comprises: a first plate (021), a material clamp (022) and a clamping drive (023); the stacking drive (004) is in transmission connection with the first plate (021); the material clamp (022) is movably connected to the first plate (021), and the material clamp (022) is in transmission connection with the clamping drive (023); The first plate (021) is provided with a first notch (211), and the first notch (211) is arranged opposite to the pressing member (003); A second plate (024) is mounted on the first plate (021), and a stacking opening (201) is formed between the second plate (024) and the first plate (021); In the plumb direction, the second plate (024) is projected onto the first plate (021); in an initial state, the first plate (021) is located below the base (001); the second plate (024) is flush with and spliced ​​to the base (001); and the packaging bag (005) to be folded is supported by the second plate (024) and the base (001); When the stacking drive device (004) drives the stacking frame (002) to move in a direction away from the base (001), the first folding section (501) extending outside the base (001) sags under the action of gravity; When the first plate (021) moves to the bottom of the base (001), the second plate (024) is located above the base (001) and pushes against the packaging bag (005) through the base (001), so that the packaging bag (005) generates a crease along the edge of the base (001) and is folded in the stacking opening (201).

2. The folding mechanism according to claim 1, characterized in that: The second plate (024) is provided with a second notch (241) opposite to the first notch (211).

3. The folding mechanism according to claim 1, characterized in that: The second plate (024) is provided with a first paving groove (242), and the first paving groove (242) is used to paving the material clamp (022).

4. The folding mechanism according to claim 1, wherein: The base (001) is provided with a second paving groove (101), and the second paving groove (101) is used to paving the material clamp (022).

5. A packaging bag strapping device, characterized in that: include: A feeding mechanism (006), a strapping mechanism (007), and a folding mechanism according to any one of claims 1 to 4; The loading mechanism (006) is used to transport the packaging bag (005) onto the base (001); The bundling mechanism (007) is installed below the folding mechanism.

6. The packaging bag strapping device according to claim 5, characterized in that: The loading mechanism (006) comprises: a material preparation carrier (061) and a material clamping and conveying member (062), wherein the material clamping and conveying member (062) is installed between the material preparation carrier (061) and the base (001); The material preparation carrier (061) is used to store the packaging bag (005), and the material clamping conveying member (062) is used to convey the packaging bag (005) from the material preparation carrier (061) to the base (001).

7. The packaging bag strapping device according to claim 6, characterized in that: The material preparation carrier (061) comprises: a supporting plate (611), a material blocking member (612) and a vibration generator (613); The support plate (611) has a material storage area for storing the packaging bags (005), the material blocking member (612) is located between the material storage area and the material clamping and conveying member (062), and the material blocking member (612) is connected to the vibration generator (613).

8. The packaging bag strapping device according to claim 7, characterized in that: The support plate (611) is hingedly mounted on the support frame (614), and the support plate (611) is in transmission connection with the deflection driving member (615); The deflection driving member (615) is used to drive the support plate (611) to switch between an inclined state and a horizontal state; In the tilted state, the support plate (611) tilts downward from an end away from the material clamping and conveying member (062) to an end close to the material clamping and conveying member (062); In the flat state, the surface of the support plate (611) is horizontal.

9. The packaging bag strapping device according to claim 8, characterized in that: The support plate (611) is provided with a slot (616), and the slot (616) is arranged opposite to the clamping claw of the material clamping and conveying member (062); In the tilted state, the material blocking member (612) passes through the slot (616) from bottom to top; In the horizontal state, the material blocking member (612) is located below the supporting plate (611).

10. The packaging bag strapping device according to claim 5, characterized in that: The bundling mechanism (007) comprises: a bundling bracket (071), a bundling clamping member (072) and a tying member (073); The bundling clamp (072) is installed above the bundling bracket (071), and the bundling clamp (072) is used to press the packaging bag (005) onto the bundling bracket (071); The tying rope member (073) is installed on the bundling bracket (071), and the tying rope member (073) is used to tie the rope member to the packaging bag (005).

11. The packaging bag strapping device according to claim 10, characterized in that: A material transfer device (074) is installed on the bundling bracket (071), and the material transfer device (074) is used to transfer the packaging bag (005) from the bundling bracket (071) to the unloading device (008).

12. A packaging bag folding method, characterized in that: The packaging bag folding method adopts the folding mechanism according to any one of claims 1 to 4, and comprises the following steps: Placing the packaging bag (005) on the base (001), and extending the first folded section (501) of the packaging bag (005) toward the stacking rack (002) to outside the bearing end surface of the base (001); The packaging bag (005) is pressed and fixed on the base (001) by the pressing member (003); The stacking frame (002) is moved to the top of the first folding section (501) by the stacking drive device (004), and then the stacking frame (002) presses down the first folding section (501), and then the stacking frame (002) pushes the first folding section (501) to bend to the bottom of the base (001); Manipulating the pressing member (003) to release the packaging bag (005); The first folding section (501) and the second folding section (502) located above the first folding section (501) are clamped by the stacking rack (002); The stacking frame (002) is driven by the stacking drive device (004) to move in a direction away from the base (001) until the third folding section (503) of the packaging bag (005) is separated from the base (001), so that the third folding section (503) is bent downward; The stacking drive device (004) is controlled to drive the stacking frame (002) to rise and translate to above the base (001). During this process, the base (001) pushes the third folding section (503) to bend to below the first folding section (501).

13. The packaging bag folding method according to claim 12, characterized in that: The packaging bag folding method further comprises: When the third folding section (503) is bent to the bottom of the first folding section (501), the second folding section (502), the first folding section (501) and the third folding section (503) are clamped between the pressing member (003) and the base (001) by the pressing member (003); Controlling the stacking drive device (004) to drive the stacking rack (002) to move, and causing the stacking rack (002) to bend the packaging bag (005) extending beyond the bearing end surface of the base (001) to below the base (001); The pressing member (003) is manipulated to release the packaging bag (005), and the packaging bag (005) is clamped by the stacking rack (002) so as to keep the packaging bag (005) in a folded state.

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