Auxiliary folding device for paper box

Abstract

The invention discloses an auxiliary folding device for a paper box. The auxiliary folding device comprises a carrying frame, a supporting arm, a bottom blocking piece, two front lug blocking pieces and two side blocking pieces. The supporting arm is arranged on the carrying frame and used for supporting a front side plate of a paperboard to be folded. The two front lug blocking pieces are arranged on the carrying frame in the left-right direction in a spaced mode and used for blocking and folding front folded lugs of a paperboard to be folded. The two side blocking pieces are located behind the front lug blocking piece and used for blocking and folding a left side plate and a right side plate on the to-be-folded paper board. The bottom blocking piece is used for blocking and folding the bottom plate. When the paperboard to be folded is placed on the carrying frame and pressed downwards, the front folding lug of the paperboard to be folded is folded inwards before the bottom plate. According to the carton folding device, auxiliary folding of a carton can be achieved, a user can complete sequential folding of firstly folding lugs and then folding bottoms only through one-time pressing action, folding interference is effectively avoided, the labor intensity of workers is remarkably reduced, and the packaging efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of packaging machinery and equipment technology, and in particular to a paper box auxiliary folding device. Background Technology

[0002] With the rapid development of the e-commerce logistics industry, paper packaging boxes (such as corrugated boxes, hinged boxes, etc.) are widely used in the packaging and transportation of various products. These boxes are usually made from a single die-cut corrugated cardboard sheet, which is folded and snapped together to form a three-dimensional structure.

[0003] Currently, in small- to medium-scale production or shipping scenarios, the forming of cardboard boxes mainly relies on manual folding. Manual folding is not only labor-intensive and inefficient, but also prone to worker fatigue due to prolonged repetitive work. Furthermore, for cardboard boxes with front flaps (or side wings), there are strict requirements for the folding sequence: typically, the front flaps on both sides must be folded inwards first, and only then can the bottom or side panels be folded to complete the locking mechanism. Completing this sequential folding process manually is prone to errors and inefficient. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the object of this invention is to provide a paper box folding auxiliary device.

[0005] To achieve the above objectives, a paper box auxiliary folding device according to an embodiment of the present invention includes: Carrier; Support arm, which is mounted on the carrier frame and is used to support the front side panel of the cardboard to be folded; Bottom stop; the bottom stop is provided on the carrier and is used to block the folding of the bottom plate of the cardboard to be folded; Two front ear stops are spaced apart on the carrier in the left-right direction, and are used to block the folding of the front ears of the left and right sides of the cardboard to be folded. Two side stops are spaced apart on the carrier in the left-right direction and located behind the two front ear stops, respectively used to block the folding of the left and right sides of the cardboard. When the cardboard to be folded is placed on the carrier and pressed, the front flaps of the left and right sides of the cardboard to be folded fold inward before the bottom plate of the cardboard to be folded.

[0006] According to the paper box folding device provided in the embodiments of the present invention, the user only needs to apply a downward pressing action to the paperboard to be folded once. The front ear stop will first contact and fold the front ear inward, and then the bottom stop will act on the bottom plate to fold. This purely mechanical automatic sequential control not only prevents interference between the front ear and the bottom plate or failure of the latch due to human operation error, ensuring the yield of paper box forming, but also simplifies the traditional cumbersome multi-step manual folding operation into a single pressing action. While significantly reducing the labor intensity and fatigue of workers, it improves the packaging efficiency in small and medium-sized production scenarios.

[0007] In addition, the paper box auxiliary folding device according to the above embodiments of the present invention may also have the following additional technical features: According to one embodiment of the present invention, the carrier includes: The base, the front ear block and the side block are disposed on the base; A stop, located behind the carrier, is used to position the lid of the cardboard box to be folded; The positioning height of the stop is lower than the blocking height of any one of the bottom stop, the front ear stop, and the side stop, so that when the cardboard to be folded is placed on the carrier, the cardboard to be folded tilts from top to bottom in the direction from front to back.

[0008] According to one embodiment of the present invention, the top surface of the carrier is at a height higher than the positioning height of the stop.

[0009] According to one embodiment of the present invention, the carrier includes a transverse guide rail and two bases, the transverse guide rail extends in a left-right direction, and the two bases are spaced apart on the transverse guide rail and are slidable in the left-right direction; the stop is slidable relative to the carrier in a front-back direction.

[0010] According to one embodiment of the present invention, the stop includes two longitudinal guide rails and a transverse stop bar; the two longitudinal guide rails correspond one-to-one with the two bases, and one end of each longitudinal guide rail is slidably connected to the corresponding base in the front-rear direction; The transverse baffle extends along the left-right direction and is used to position the box lid of the cardboard to be folded in the front-back direction. The other end of the longitudinal guide rail is slidably connected to the transverse baffle in the left-right direction.

[0011] According to one embodiment of the present invention, the stop includes two longitudinal guide rails, two stop blocks and a transverse stop bar; the two longitudinal guide rails correspond one-to-one with the two bases, and one end of each longitudinal guide rail is slidably connected to the corresponding base in the front-back direction; The two stops are respectively fixed to the other end of the corresponding longitudinal guide rails. Each stop can slide on the transverse stop bar in the left-right direction to position the box lid of the cardboard to be folded in the front-back direction.

[0012] According to one embodiment of the present invention, each end of the transverse baffle is provided with a sliding baffle, which is slidable along the length of the transverse baffle to position the box lid of the cardboard to be folded in the left-right direction.

[0013] According to one embodiment of the present invention, the upper end of the front ear stop has a blocking structure for blocking the folding of the front ear; The blocking structure includes at least a blocking surface. When the cardboard to be folded is placed on the carrier, the front folding ear is located above the blocking surface, and the blocking surface is inclined from top to bottom in the direction from front to back.

[0014] According to one embodiment of the present invention, the blocking structure further includes a first guide surface, which intersects with the blocking surface and is located behind the blocking surface. The first guide surface is inclined from top to bottom in a front-to-back direction, and the inclination angle of the first guide surface is greater than the inclination angle of the blocking surface.

[0015] According to one embodiment of the present invention, the two side stops are symmetrically arranged in the left-right direction, and each side stop is arranged adjacent to the corresponding front ear stop; the upper end of the side stop has a second guide surface, the second guide surface is inclined from top to bottom in the direction from the outside to the inside, and the inside is the side of the two side stops facing each other.

[0016] According to one embodiment of the present invention, the bottom stop includes a first guide wheel and a second guide wheel, the axes of the first guide wheel and the second guide wheel extend in the left-right direction, the first guide wheel is disposed on the inner side of one of the two front ear stops, and the wheel surface of the first guide wheel is lower than the blocking surface of the front ear stop where it is located. The second guide wheel is disposed on the inner side of the other of the two front ear stops, and the wheel surface of the second guide wheel is lower than the blocking surface of the front ear stop on which it is located.

[0017] According to one embodiment of the present invention, there are multiple first guide wheels and multiple second guide wheels, and the multiple first guide wheels and multiple second guide wheels are arranged sequentially along an inclined path, the inclined path being inclined downward from front to back.

[0018] According to one embodiment of the present invention, each of the side stops is further provided with a third guide wheel, the axis of the third guide wheel extending in the front-rear direction, and the third guide wheel being adjacent to the lower end of the second guide surface.

[0019] According to one embodiment of the present invention, the diameter of the third guide wheel gradually decreases in the direction from front to back.

[0020] According to one embodiment of the present invention, the support arm is connected to the upper end of the corresponding front ear stop and extends from bottom to top in a rear-to-front direction.

[0021] According to one embodiment of the present invention, the support arm is pivotally connected to the upper end of the front ear stop and is rotatable in the front-rear direction to an unfolded state or a folded state.

[0022] According to one embodiment of the present invention, it further includes an intermediate guide assembly disposed between the two front ear stops; The intermediate guide assembly includes a mounting base and a fourth guide wheel disposed on the mounting base. The mounting base is disposed on the carrier, and the axis of the fourth guide wheel extends in the left-right direction, which is used to provide auxiliary support and guidance for the middle area of ​​the bottom plate of the cardboard to be folded during the folding process.

[0023] According to one embodiment of the present invention, a lifting support is further included. The lifting support is disposed on the base or the transverse guide rail. The top surface of the lifting support is at the same height as the top surface of the base, and the height of the top surface of the base is higher than the positioning height of the stop.

[0024] According to one embodiment of the present invention, it further includes a lifting support member disposed on the intermediate guide assembly, wherein the top surface of the lifting support member is at the same height as the top surface of the base, and the height of the top surface of the base is higher than the positioning height of the stop.

[0025] According to one embodiment of the present invention, the intermediate guide assembly further includes a locking member, the mounting seat being slidable in a left-right direction on the carrier, and the locking member being configured to selectively lock the mounting seat to the carrier.

[0026] According to one embodiment of the present invention, the position of the front ear baffle is adjustable in the vertical direction, and the position of the side baffle is adjustable in the front-back direction.

[0027] According to one embodiment of the present invention, the blocking height of the front ear stop is higher than the blocking height of the bottom stop.

[0028] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 This is a diagram of the cardboard to be folded; Figure 2 This is a schematic diagram of one embodiment of the paper box auxiliary folding device of the present invention; Figure 3 This is a side view of the paper box auxiliary folding device of the present invention; Figure 4 This is a schematic diagram of another embodiment of the paper box auxiliary folding device of the present invention; Figure 5 This is a schematic diagram of the various degrees of freedom of motion of the paper box auxiliary folding device of the present invention; Figure 6 This is a schematic diagram of the structure of the paper box auxiliary folding device of the present invention in the state of the paperboard to be folded; Figure 7 This is a schematic diagram of another embodiment of the paper box auxiliary folding device of the present invention; Figure 8 This is a schematic diagram of another embodiment of the paper box auxiliary folding device of the present invention; Figure 9 This is a side view of the paper box auxiliary folding device of the present invention in the state of the paperboard to be folded; Figure 10 This is a schematic diagram of the structure of the paper box auxiliary folding device of the present invention during the folding process of the cardboard to be folded; Figure 11 This is a schematic diagram of the structure of the paper box auxiliary folding device of the present invention when the cardboard to be folded is partially folded; Figure 12 This is a schematic diagram of the structure of the paper box auxiliary folding device of the present invention, which is manually folded to complete the shape after the paperboard to be folded is partially folded.

[0031] Figure label: 100. Cardboard to be folded; 10. Base plate; 11. Left side plate; 12. Right side plate; 11a, 12a. Front folding lugs; 11b, 12b. Rear folding lugs; 13. Rear side plate; 14. Front side plate; 14a. Dustproof wing; 15. Lid; 151. Cover plate; 152. Front panel; 152a. Tongue; 20. Carrier frame; 201, Carrier; 2011, Transverse guide rail; 2012, Base; 202, Stop; 2021, Longitudinal guide rail; 2022, Transverse stop bar; 2023, Sliding stop; 2024, Stop block; H2024, Positioning groove; 30. Bottom stop; 301, First guide wheel; 302, Second guide wheel; 40. Front ear cover; S401, blocking surface; S402, first guiding surface; 50. Side guards; S50, second guide surface; 51. Third guide wheel; 60. Support arm; 70. Intermediate guide component; 701. Mounting base; 702. Fourth guide wheel; 703. Locking component; 80. Raise the support components.

[0032] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," and "radial," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The paper box auxiliary folding device of the present invention will now be described in detail with reference to the accompanying drawings.

[0039] Reference Figures 2 to 12 As shown, the cardboard box auxiliary folding device provided according to an embodiment of the present invention is mainly used in the semi-automatic folding and forming operation of packaging cardboard boxes such as airplane boxes. The cardboard box auxiliary folding device includes a carrier frame 20, a support arm 60, a bottom stop 30, two front ear stops 40, and two side stops 50.

[0040] Specifically, the carrier 20 is used to install the bottom stop 30, two front ear stops 40, and two side stops 50, and can also hold the cardboard 100 to be folded. The carrier 20 can be stably placed on a flat surface such as a desktop or workbench.

[0041] A support arm 60 is mounted on the carrier 20 to support the front panel 14 of the cardboard 100 to be folded. It is understood that the front panel 14 may include two dustproof wings 14a at its left and right ends. During use, the support arm 60 ensures that the front panel 14 is stably supported, rather than hanging freely, thus keeping the cardboard 100 stable and flat when placed. This stable and flat state allows the operator to quickly and smoothly complete the folding of the bottom panel 10, left side panel 11, and right side panel 12 after pressing down on the cardboard 100, improving the reliability of the folding operation, especially for cardboard boxes with a relatively long front panel 14.

[0042] A bottom stop 30 is provided on the carrier 20 to prevent the bottom plate 10 of the cardboard 100 from folding. For example, the bottom stop 30 is provided in the front area of ​​the carrier 20, corresponding to the position of the bottom plate 10 of the cardboard box. When the cardboard 100 is pressed down, the bottom stop 30 abuts against the bottom plate 10 of the cardboard 100, forcing the bottom plate 10 to fold upward along the crease.

[0043] Two front ear stops 40 are spaced apart on the carrier 20 in the left-right direction, respectively, to prevent the front folding ears 11a and 12a of the left side panel 11 and right side panel 12 on the cardboard 100 to be folded from folding. Exemplarily, the two front ear stops 40 are spaced apart in the front region of the carrier 20 in the left-right direction, corresponding to the positions of the front folding ears 11a and 12a extending from the front ends of the left side panel 11 and right side panel 12 on the cardboard 100 to be folded. During the downward pressing of the cardboard 100, the two front ear stops 40 abut against the front folding ears 11a and 12a of the left side panel 11 and right side panel 12 on the cardboard 100 to be folded, forcing the front folding ears 11a and 12a to fold upward along the crease.

[0044] Two side stops 50 are spaced apart on the carrier 20 in the left-right direction and located behind the two front ear stops 40, respectively, to prevent the left side panel 11 and right side panel 12 of the cardboard 100 from folding. The spacing between the two side stops 50 matches the width of the formed cardboard box. During the downward pressing of the cardboard 100, they contact the left side panel 11 and right side panel 12 of the cardboard 100, causing it to fold upward.

[0045] When the cardboard to be folded is placed on the carrier 20 and pressed, the front folding ears 11a and 12a of the left side plate 11 and right side plate 12 of the cardboard to be folded fold inward before the bottom plate 10 of the cardboard to be folded 100.

[0046] When using this cardboard box folding device, the operator first places the flat cardboard 100 to be folded on the carrier 20, aligning the creases of the cardboard roughly with the corresponding bottom stop 30, the two front ear stops 40, and the two side stops 50. Then, the operator presses down on the cardboard with one hand, causing the entire cardboard 100 to move downwards. During this process, the front folding ears 11a and 12a on the left and right sides of the cardboard 100 first contact the top of the front ear stops 40; as the cardboard continues to be pressed down, the front ear stops 40 force the front folding ears 11a and 12a to bend inwards first.

[0047] Next, as the cardboard is pressed further down, the bottom stop 30 and the side stop 50 begin to contact the corresponding parts of the cardboard. At this time, since the front folding ears 11a and 12a have already completed their pre-folded inward movement, when the bottom plate 10 folds upward under the action of the bottom stop 30, and the left side plate 11 and right side plate 12 fold inward under the action of the side stop 50, the already retracted front folding ears 11a and 12a can be accurately wrapped inside the angle formed by the left side plate 11, right side plate 12 and bottom plate 10, without interfering with or getting stuck outside the bottom plate 10. When the cardboard is pressed to the bottom limit position of the carrier 20, the front folding ears 11a and 12a, the left side plate 11, the right side plate 12 and the bottom plate 10 are all folded in place, and the remaining parts can be folded manually to form a cardboard box.

[0048] According to the paper box folding device provided in the embodiments of the present invention, the user only needs to apply a downward pressing action to the paperboard 100 to be folded once. The front ear stop 40 will first contact and fold the front folding ears 11a and 12a inward. Then the bottom stop 30 will act on the bottom plate 10 to fold. This purely mechanical automatic sequential control not only reduces interference or buckling failure between the front ear and the bottom plate 10 due to human error, ensuring the yield of paper box forming, but also simplifies the traditional cumbersome multi-step manual folding operation into a single pressing action. While significantly reducing the labor intensity and fatigue of workers, it improves the packaging efficiency in small and medium-sized production scenarios.

[0049] Preferably, the blocking height of the front ear stop 40 is higher than that of the bottom stop 30. The "blocking height" refers to the height of the contact surface between the front ear stop 40 or the bottom stop 30 and the cardboard. In use, the operator presses down on the cardboard with one hand, causing the cardboard 100 to move downwards as a whole. Due to the higher height of the front ear stop 40, the front folding ears 11a and 12a on the left and right sides of the cardboard 100 will first contact the top of the front ear stop 40; as the cardboard continues to be pressed down, the front ear stop 40 forces the front folding ears 11a and 12a to bend inwards first. As the cardboard 100 is further pressed down, the bottom stop 30 and the side stops 50 begin to contact the corresponding parts of the cardboard. Thus, by setting the height difference between the front ear stop 40 and the bottom stop 30, the folding sequence during the folding process is ensured, improving the reliability of repeated folding.

[0050] Reference Figures 2 to 7 As shown, in one embodiment of the present invention, the carrier 20 includes a carrier 201 and a stop 202, with a bottom stop 30, a front ear stop 40, and a side stop 50 disposed on the carrier 201. The stop 202 is located behind the carrier 201 and is used to position the lid 15 of the cardboard 100 to be folded. It is understood that the lid 15 may include a cover plate 151, a panel 152 connected to the rear side of the cover plate 151, and tongues 152a connected to both ends of the panel 152.

[0051] The positioning height of the stop 202 is lower than the blocking height of any one of the bottom stop 30, the front ear stop 40 and the side stop 50, so that when the cardboard to be folded 100 is placed on the carrier 20, the cardboard to be folded 100 is tilted from top to bottom in the direction from front to back.

[0052] The positioning height refers to the height at which the plane of the stop 202 contacts and supports the lid 15. Based on this height difference design, when the cardboard 100 to be folded is placed on the carrier 20, the rear portion of the lid 15 will sink onto the lower stop 202, while the front folding area (including the base plate 10, left side plate 11, right side plate 12, and front folding ears 11a, 12a) overlaps or is suspended on the higher stop areas of the carrier 201. This stepped distribution in height makes the cardboard 100 to be folded exhibit a tilted posture with a higher front and lower back when naturally placed, that is, tilted from top to bottom in the direction from front to back.

[0053] In this embodiment, the height difference design ensures that the cardboard 100 to be folded is tilted. Under this tilted posture, the cardboard naturally slides backward and rests against the positioning reference of the stop 202, utilizing the component of gravity. This achieves gravity-assisted automatic alignment of the cardboard, greatly reducing the time required for manual fine-tuning and ensuring alignment between the crease lines and the stops. Furthermore, the tilted posture more firmly limits the position of the cardboard lid 15, preventing it from shifting or moving forward or backward during the folding process, thus further improving the accuracy and stability of the folding process.

[0054] Reference Figure 2 , Figure 3 , Figure 6 , Figure 7 and Figure 11 As shown, in one embodiment of the present invention, the height of the top surface of the carrier 201 is higher than the positioning height of the stop 202.

[0055] After the cardboard 100 to be folded is pressed by the device, its main mechanical folding action is initially completed. At this time, the cardboard box presents a specific semi-formed posture. That is, the bottom plate 10 of the cardboard 100 to be folded has been folded into a vertical state, while the rear side plate 13 connecting the box cover 15 remains horizontal and is attached to the top surface of the higher carrier 201.

[0056] In this semi-formed state, because the top surface of the support 201 for the rear side panel 13 is higher in vertical height than the positioning surface of the stop 202 supporting the end of the lid 15, the lid 15 connected to the rear end of the rear side panel 13 cannot maintain a horizontal extension. Instead, based on the height difference, it exhibits a gradually downward tilting posture from front to back. At the same time, the left side panel 11 and the right side panel 12 have been erected under the action of the side stop 50, and the rear folding ears 11b and 12b extending from their rear ends are located on both sides of the lid 15. It is precisely because of the downward tilt angle of the lid 15 due to the aforementioned height difference that the two sides of the lid 15 sink relative to the horizontal state, thus naturally forming a reserved clearance gap between the rear folding ears 11b of the left side panel 11 and the rear folding ears 12b of the right side panel 12, which are not yet fully folded.

[0057] The formation of this clearance provides convenient operating conditions for the subsequent manual folding process. In the specific work process, after the mechanical pressing is completed, the operator usually needs to perform the subsequent manual folding, that is, first fold the front panel 14 and the dustproof wings 14a at both ends of the front panel 14 into place, and then fold the rear folding ears 11b and 12b of the left side panel 11 and the right side panel 12 inward to complete the locking. At this time, due to the existence of the clearance, the rear folding ears 11b and 12b of the left side panel 11 and the right side panel 12 can avoid the two side edges of the lid 15 part on the inward swinging trajectory, preventing the possibility of physical interference, friction or jamming between the two, so that the rear folding ears 11b and 12b can smoothly enter the predetermined position.

[0058] This embodiment utilizes the height difference design between the carrier 201 and the stop 202 to make the lid 15 tilt downwards in the middle of the folding state, thereby creating a clearance between the rear folding ears 11b and 12b of the left side plate 11 and the right side plate 12 and the edge of the lid 15. This allows the operator to quickly complete the action without having to carefully adjust the angle when performing manual folding later, which not only ensures the quality of the cardboard box forming but also further improves the overall packaging folding efficiency.

[0059] Reference Figure 2 , Figure 3 , Figure 6 , Figure 7 and Figure 9 As shown, in some embodiments of the present invention, the upper end of the front ear block 40 has a blocking structure for blocking the folding of the front ears 11a, 12a.

[0060] The blocking structure includes at least a blocking surface S401. When the cardboard 100 to be folded is placed on the carrier 20, the front folding ears 11a and 12a are located above the blocking surface S401. The blocking surface S401 is inclined from top to bottom in the direction from front to back. That is, the front end height of the blocking surface S401 is slightly higher than the rear end height, forming a slope structure with a guiding function.

[0061] In this embodiment, the blocking surface S401 is designed with a tilted shape that is higher in the front and lower in the back. When the user presses the cardboard, the higher front end of the blocking surface S401 can contact the front folding ears 11a and 12a first. Then, as the cardboard continues to be pressed down, the tilted blocking surface S401 guides the front folding ears 11a and 12a to slide and fold inward smoothly, ensuring the smoothness and accuracy of the folding action of the front folding ears 11a and 12a.

[0062] Reference Figure 2 , Figure 3 , Figure 6 , Figure 7 and Figure 9As shown, in one embodiment of the present invention, the blocking structure further includes a first guide surface S402, which intersects with the blocking surface S401 and is located behind the blocking surface S401. The first guide surface S402 is inclined from top to bottom in a front-to-back direction, and the inclination angle of the first guide surface S402 is greater than the inclination angle of the blocking surface S401.

[0063] In other words, the first guide surface S402 has a larger tilt angle. When the cardboard 100 to be folded moves downward under the pressing action, the front folding ears 11a and 12a first contact the relatively gentle blocking surface S401 and undergo initial bending. As the pressing action continues, the contact point of the front folding ears 11a and 12a smoothly transitions to the steeper first guide surface S402. At this time, the first guide surface S402 uses its larger slope to force the front folding ears 11a and 12a to accelerate inward convergence and slide downward, completing the deep folding action.

[0064] In this embodiment, by setting a blocking surface S401 with a smaller angle at the front and a larger angle at the back, and a first guiding surface S402, the relatively gentle blocking surface S401 can gently receive the front folding ears 11a and 12a and guide them to deform initially, preventing the cardboard edges from being crushed or curled due to excessive force caused by too steep a contact angle; while the relatively steep first guiding surface S402 can quickly guide the front folding ears 11a and 12a to fold inward and avoid each other after the front folding ears 11a and 12a have initially bent, ensuring that the front folding ears 11a and 12a can quickly complete the folding within a very short stroke, thereby improving the smoothness of folding and the forming quality.

[0065] Reference Figure 2 , Figure 6 , Figure 7 and Figure 10 As shown, in one embodiment of the present invention, the two side stops 50 are symmetrically arranged in the left-right direction, and each side stop 50 is arranged adjacent to the corresponding front ear stop 40; the upper end of the side stop 50 has a second guide surface S50, the second guide surface S50 is inclined from top to bottom in the direction from the outside to the inside, and the inside is the side of the two side stops 50 facing each other.

[0066] In practical use, when the cardboard 100 to be folded moves vertically downward under the pressure of the operator, the bottom surfaces of the left side panel 11 and right side panel 12 of the cardboard 100 will first contact the outer edge of the higher-positioned second guide surface S50. As the downward pressing action continues, the inclined second guide surface S50 forces the left side panel 11 and right side panel 12 to gradually fold upward and inward along the crease until the left side panel 11 and right side panel 12 are guided to slide into the space inside the two side stops 50, thereby completing the folding action of the left side panel 11 and right side panel 12.

[0067] In this embodiment, an inwardly inclined second guide surface S50 is provided on the upper end of the side baffle 50. The inclined guide surface enables the left side plate 11 and the right side plate 12 to be folded smoothly and precisely, preventing the cardboard from breaking or the crease from shifting due to sudden changes in force. At the same time, this structure with a higher outer surface and a lower inner surface can automatically correct the slight left and right deviations when the cardboard is placed. It also has an automatic inward centering function during the pressing process, ensuring that the left side plate 11 and the right side plate 12 can be folded precisely along the crease line, thereby improving the appearance flatness and structural consistency of the formed cardboard box.

[0068] Reference Figure 2 , Figure 6 , Figure 7 and Figure 10 As shown, in one embodiment of the present invention, the bottom stop 30 includes a first guide wheel 301 and a second guide wheel 302, the axes of the first guide wheel 301 and the second guide wheel 302 extending in the left-right direction, thereby ensuring that the rolling direction of the first guide wheel 301 is adapted to the relative motion trajectory of the cardboard during the folding process.

[0069] A first guide wheel 301 is disposed on the inner side of one of the two front ear stoppers 40, and the wheel surface of the first guide wheel 301 is lower than the blocking surface S401 of the front ear stopper 40 on which it is located. A second guide wheel 302 is disposed on the inner side of the other of the two front ear stoppers 40, and the wheel surface of the second guide wheel 302 is lower than the blocking surface S401 of the front ear stopper 40 on which it is located.

[0070] For example, the first guide wheel 301 is rotatably connected to the inner side of one of the front ear stops 40 (e.g., the left front ear stop 40) via a pin or bearing, while the second guide wheel 302 is rotatably connected to the inner side of the other front ear stop 40 (e.g., the right front ear stop 40) in the same manner. This arrangement positions the first guide wheel 301 and the second guide wheel 302 below the bottom plate 10 on both sides of the cardboard 100 to be folded.

[0071] When the cardboard 100 to be folded is placed on the carrier 20 and pressed down, the blocking surface S401 of the front ear stop 40 located at the higher position first contacts the front folding ears 11a and 12a and drives them to complete the inward fold. Subsequently, as the cardboard continues to descend, the bottom plate 10 portion of the cardboard 100 to be folded will contact the lower-positioned first guide wheel 301 and second guide wheel 302. At this time, the first guide wheel 301 and second guide wheel 302 act as fulcrums for folding the bottom plate 10, forcing the bottom plate 10 to fold upward relative to the top. At the same time, the first guide wheel 301 and second guide wheel 302 rotate with the downward pressing action of the cardboard, guiding the bottom plate 10 to fold.

[0072] In this embodiment, on the one hand, by utilizing the rolling characteristics of the first guide wheel 301 and the second guide wheel 302, the contact between the cardboard and the blocking member is changed from sliding friction to rolling friction, which greatly reduces the running resistance during the pressing process, making the feel smoother and preventing scratches or damage to the cardboard surface due to excessive friction. On the other hand, the first guide wheel 301 and the second guide wheel 302 are respectively installed on the inner side of the two front ear blocking members 40. The first guide wheel 301 and the second guide wheel 302, which are distributed on the left and right sides, provide stable double-point support for both sides of the base plate 10, ensuring that the folding force of the base plate 10 is uniform and preventing skewing or uneven creases, further improving the refinement and consistency of the cardboard box forming.

[0073] Preferably, there are multiple first guide rollers 301 and multiple second guide rollers 302. The multiple first guide rollers 301 and multiple second guide rollers 302 are sequentially arranged along an inclined path that slopes downwards from front to back. In this structure, the multiple first guide rollers 301 or multiple second guide rollers 302 together form a rolling support surface with a downward slope. This allows the bottom plate 10 of the cardboard 100 to contact and roll with the first guide rollers 301 or second rollers of different heights sequentially from front to back during the pressing process, thereby conforming to the downward pressing and rearward positioning trend of the cardboard.

[0074] By setting multiple first guide rollers 301 and multiple second guide rollers 302 along the downward inclined path, the single-point support is transformed into multi-point flexible rolling support, which effectively disperses the reaction force on the bottom plate 10 and prevents the cardboard from being indented due to excessive local pressure. At the same time, the rolling path with the front higher and the back lower matches the movement trajectory of the cardboard box when folding into place, reducing the frictional resistance in the downward stroke and making the folding feel smoother and more fluid.

[0075] Reference Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 10 and Figure 11 As shown, in one embodiment of the present invention, each of the side stops 50 is further provided with a third guide wheel 51. The axis of the third guide wheel 51 extends in the front-rear direction, and the third guide wheel 51 is adjacent to the lower end of the second guide surface S50. Exemplarily, the third guide wheel 51 is rotatably mounted by a bearing or pin structure, and its rotation axis extends in the front-rear direction, that is, parallel to the left side plate 11 / right side plate 12 after folding and standing upright.

[0076] When the cardboard 100 to be folded is pressed, the left side plate 11 / right side plate 12 first completes the initial folding by the inclined guide of the second guide surface S50. As the cardboard continues to move downward, the outer surfaces of the left side plate 11 / right side plate 12 smoothly transition and adhere to the wheel surface of the third guide wheel 51. At this time, the left side plate 11 and right side plate 12 move downward relative to the side stop 50 in a vertical state, driving the third guide wheel 51 to passively rotate around its axis.

[0077] In this embodiment, by adding a third guide wheel 51 to the end of the second guide surface S50 of the side baffle 50, the contact mode between the left side plate 11 and the right side plate 12 and the side baffle 50 during the folding and standing process is changed from sliding friction to rolling friction. This reduces the frictional resistance after the cardboard is pressed down, reduces the risk of jamming, and makes the pressing feel smoother. At the same time, the flexible rolling contact effectively protects the outer surface of the left side plate 11 and the right side plate 12, preventing scratches or damage to the surface of the cardboard box due to hard scratches, thereby ensuring the appearance quality of the finished cardboard box.

[0078] Preferably, the diameter of the third guide wheel 51 gradually decreases from front to back. This gradually decreasing diameter structure makes the rolling contact surface of the third guide wheel 51 form a conical surface, which is adapted to the tilted cardboard 100 to be folded, allowing it to better fit the outer wall of the tilted side panel of the cardboard box. This increases the effective contact area during the guiding process, ensuring that the left side panel 11 and right side panel 12 stand upright smoothly. It also prevents the edges of the third guide wheel 51 from causing indentations or damage to the cardboard surface, ensuring the appearance quality of the cardboard box after it is formed.

[0079] Reference Figures 2 to 9 As shown, in some embodiments of the invention, the support arm 60 is connected to the upper end of the corresponding front ear stop 40 and extends upward from bottom to top in a rear-to-front direction. More advantageously, there are two support arms 60, each corresponding to one of the two front ear stops 40, with each support arm 60 connected to the upper end of the corresponding front ear stop 40 and extending upward from bottom to top in a rear-to-front direction.

[0080] In this embodiment, to improve the stability of the cardboard 100 in its initial placement state, especially for cardboard boxes with a relatively long front side panel 14, the two support arms 60 and the two front ear stops 40 are configured in a one-to-one correspondence. In terms of spatial form, the support arms 60 extend from bottom to top in a backward-to-forward direction, thereby forming an open support structure at an upward angle at the front end of the device.

[0081] When the operator places the cardboard 100 to be folded on the carrier 20, the front side panel 14 (i.e., the panel connected to the front end of the base plate 10) of the cardboard 100 will naturally overlap and fit against the two support arms 60. The extension length and upward tilt angle of the support arms 60 are adapted to ensure that the front side panel 14 is stably supported, rather than hanging freely, thus keeping the cardboard 100 stable and flat when placed. This stable and flat state allows the operator to quickly complete the folding of the base plate 10, left side panel 11, and right side panel 12 after pressing down on the cardboard 100, improving the reliability of the pressing and folding.

[0082] Reference Figure 2 , Figure 6 and Figure 7 As shown, in one embodiment of the present invention, the support arm 60 is pivotally connected to the upper end of the front ear stop 40 and can rotate in the front-rear direction to an unfolded state or a folded state.

[0083] For example, the rear end of each support arm 60 is pivotally connected to the upper end of the corresponding front ear stop 40 via a pivot, pin, or damped hinge mechanism. Based on this pivot connection structure, the support arm 60 has the degree of freedom to rotate freely in the front-rear direction about a horizontal axis, thereby enabling flexible switching between the unfolded and folded states.

[0084] To ensure that the support arm 60 has sufficient load-bearing rigidity in the unfolded state, the upper end of the front ear stop 40 or the rotating root of the support arm 60 is provided with an angle limiting structure (such as a limiting step, a limiting block or a blocking pin). When the support arm 60 rotates forward to the preset unfolding angle, the limiting structure engages in a stop-fitting action, preventing the support arm 60 from continuing to rotate downward, thereby locking its position.

[0085] This embodiment improves the space utilization and portability of the device by designing the support arm 60 as a foldable structure that can be flipped back and forth. In the working state, the unfolded support arm 60 can provide necessary extension support for the front side panel 14 of the cardboard 100 to be folded, ensuring placement stability. When the device is idle, in storage stacking, or during logistics transportation, the support arm 60 can be folded into a non-use state, which can significantly reduce the overall outline volume of the device, effectively avoiding the risk of accidental collision, breakage, or bending deformation of the long support arm 60 due to protrusion beyond the main body, and also reducing packaging and transportation costs.

[0086] In reference Figure 4 and Figure 7 As shown, in some embodiments of the present invention, the cardboard box auxiliary folding device further includes an intermediate guide assembly 70, which is disposed between the two front ear stops 40.

[0087] The intermediate guide assembly 70 includes a mounting base 701 and a fourth guide wheel 702 disposed on the mounting base 701. The mounting base 701 is disposed on the carrier 20. The axis of the fourth guide wheel 702 extends in the left-right direction and is used to provide auxiliary support and guidance for the middle area of ​​the bottom plate 10 of the cardboard to be folded 100 during the folding process.

[0088] To ensure the flatness of the folded shape, the height plane of the top surface of the fourth guide wheel 702 is basically consistent with the support height of the first guide wheel 301 and the second guide wheel 302, thus jointly constructing a stable bottom support plane in space. When the large-sized cardboard 100 to be folded is placed on the carrier 20 and pressed down, the bottom plate 10 of the cardboard 100 is not only acted upon by the first guide wheel 301 and the second guide wheel 302 on the left and right sides, but its central area also contacts the fourth guide wheel 702. During the pressing process, the fourth guide wheel 702 applies an upward resisting force to the central area of ​​the bottom plate 10 of the cardboard 100 and rolls to guide it as the cardboard moves downward and backward.

[0089] This embodiment effectively solves the problem of large-size cardboard collapsing, warping, or deforming in the middle due to excessive span during folding by adding an intermediate guide component 70 containing a fourth guide wheel 702 between the two front ear stops 40. This ensures that the bottom plate 10 remains flat during folding and also guarantees the accuracy of folding the left side plate 11 and the right side plate 12. At the same time, the rolling contact method avoids the support components from scratching the cardboard surface, which improves the reliability of large-size cardboard box forming and also improves the appearance forming quality.

[0090] Reference Figure 4 and Figure 7 As shown, in one embodiment of the present invention, the intermediate guide assembly 70 further includes a locking member 703. The mounting base 701 is slidable in the left-right direction on the carrier 20, and the locking member 703 is configured to selectively lock the mounting base 701 to the carrier 20. The locking member 703 may be in the form of a hand-tightening screw, a cam locking handle, or a bolt pressure plate assembly, etc.

[0091] When the locking element 703 is in the loose state, the operator can manually push the mounting base 701 to move horizontally in the left and right directions according to the width of the cardboard 100 to be folded or the specific structural features of the base plate 10, and adjust the fourth guide wheel 702 to the optimal support position. After adjustment, tighten or fasten the locking element 703, and use friction or mechanical interlocking force to firmly lock the mounting base 701 onto the carrier 20, ensuring that the mounting base 701 does not shift during the folding operation.

[0092] This embodiment enhances the versatility and flexibility of the device through the left-right adjustment and locking function of the intermediate guide component 70. On the one hand, for narrower cardboard boxes, the intermediate component can be adjusted to the geometric center to achieve optimal balance; on the other hand, for complex cardboard with functional structures (such as holes) at the center of the base plate 10, the position of the fourth guide wheel 702 can be adjusted by left-right offset to effectively avoid the hole area and act on the solid part of the base plate 10, ensuring that the device can adapt to the stable folding requirements of diverse cardboard box products.

[0093] Reference Figures 2 to 7 As shown, in one embodiment of the present invention, the carrier 201 includes a transverse guide rail 2011 and two bases 2012. The transverse guide rail 2011 extends in a left-right direction, and the two bases 2012 are spaced apart on the transverse guide rail 2011 and are slidable in the left-right direction. The stop 202 is slidable relative to the carrier 201 in a front-back direction. Preferably, the base 2012 may be provided with locking devices such as knobs, eccentric handles, or fastening screws. The operator locks the base 2012 to the transverse guide rail 2011 and locks the stop 202 relative to the carrier 201 using the locking devices.

[0094] This embodiment achieves adjustable length and width dimensions by setting a horizontally slidable base 2012 and a vertically slidable stop 202 on the carrier 201. This allows the same device to flexibly adapt to the folding needs of various paper boxes with different length and width specifications. Users only need to adjust the left and right spacing of the base 2012 to adapt to the width of the paper box and adjust the front and back position of the stop 202 to adapt to the length of the paper box to quickly complete the adaptation adjustment, making it more flexible and convenient to use.

[0095] For example, the top surface of the base 2012 is at a height higher than the positioning height of the stop 202, thus forming the height difference between the carrier 201 and the stop 202 mentioned above. This height difference design between the carrier 201 and the stop 202 utilizes geometric positioning to cause the lid 15 to tilt downwards in the middle of the folding process, creating a clearance between the rear folding ears 11b and 12b of the left and right side panels 11 and the edge of the lid 15. This allows operators to quickly complete the folding process without carefully adjusting the angle during subsequent manual folding, ensuring the quality of the cardboard box while further improving the overall packaging folding efficiency.

[0096] Reference Figure 2 and Figure 5As shown, in one embodiment of the present invention, the stop 202 includes two longitudinal guide rails 2021 and a transverse stop bar 2022; the two longitudinal guide rails 2021 correspond one-to-one with the two bases 2012, and one end of each longitudinal guide rail 2021 is slidably connected to the corresponding base 2012 in the front-rear direction. The longitudinal guide rails 2021 can be extended and retracted relative to the bases 2012, thereby changing the longitudinal distance of the stop 202 as a whole relative to the carrier 201.

[0097] The transverse baffle 2022 extends along the left-right direction and is used to position the lid 15 of the cardboard 100 to be folded in the front-back direction. In practical use, the rear side of the lid 15 of the cardboard 100 to be folded can be held against the inner side of the transverse baffle 2022 to position the lid 15 of the cardboard 100 to be folded in the front-back direction. The other end of the longitudinal guide rail 2021 is slidably connected to the transverse baffle 2022 in the left-right direction. When the two bases 2012 adjust the distance in the left-right direction, the two longitudinal guide rails 2021 can move laterally synchronously and slide relative to each other on the transverse baffle 2022 without hindering the width adjustment of the bases 2012. To ensure stability after adjustment, each sliding connection is equipped with a locking knob or bolt assembly, which can be locked and fixed after the position is adjusted.

[0098] This embodiment employs a combination of longitudinal guide rail 2021 (extending and retracting) and transverse stop bar 2022 (sliding left and right), forming a linkage positioning frame with bidirectional adjustment capability. This structure solves the motion coupling problem between the adjustment of stop 202 and base 2012, allowing stop 202 to automatically adapt without interference when adjusting width, and to independently extend and retract when adjusting length. This highly flexible adjustment mechanism enables the same device to quickly and accurately adapt to various sizes of cardboard boxes with different length-to-width ratios, providing a stable positioning reference for the box cover 15 and improving the device's versatility and changeover efficiency.

[0099] Reference Figure 6 and Figure 7 As shown, in another embodiment of the present invention, the stop 202 includes two longitudinal guide rails 2021, two stop blocks 2024 and a transverse stop bar 2022; the two longitudinal guide rails 2021 correspond one-to-one with the two bases 2012, and one end of each longitudinal guide rail 2021 is slidably connected to the corresponding base 2012 in the front-back direction.

[0100] The two stops 2024 are respectively fixed to the other end of the corresponding longitudinal guide rail 2021. Each stop 2024 can slide on the transverse stop bar 2022 in the left and right direction, and is used to position the box cover 15 of the cardboard 100 to be folded in the front and back direction.

[0101] The difference between this embodiment and the previous embodiment is that the other end of the longitudinal guide rail 2021 is not directly slidably connected to the transverse stop bar 2022. Instead, in this embodiment, a stop block 2024 is fixedly installed at the other end of the longitudinal guide rail 2021, and the stop block 2024 is further slidably connected to the transverse stop bar 2022. When the distance between the two bases 2012 is adjusted in the left-right direction, the two longitudinal guide rails 2021 can move laterally synchronously. At this time, the stop block at the other end of the longitudinal guide rail 2021 slides relative to the transverse stop bar 2022, ensuring the free adjustment of the width between the two bases 2012. To ensure the stability after adjustment, each of the above sliding connections is equipped with a locking knob or bolt assembly, which can lock and fix each component after the position is adjusted.

[0102] Furthermore, it should be understood that in this embodiment, the stop 2024 is used for positioning the lid 15 in the front-back direction, and a positioning groove H2024 can be provided on the inner side of the stop 2024. In use, the rear side of the lid 15 of the cardboard 100 to be folded can be held against the positioning groove H2024 of the stop 2024, so that the lid 15 of the cardboard 100 to be folded can be positioned in the front-back direction by the stop 2024.

[0103] Reference Figures 2 to 7 As shown, in one embodiment of the present invention, sliding stops 2023 are provided at both ends of the transverse stop 2022. The sliding stops 2023 can slide along the length direction of the transverse stop 2022 to position the lid 15 of the cardboard 100 to be folded in the left-right direction.

[0104] In actual operation, the user pushes the two sliding stops 2023 inward until they are close to the side of the lid 15 according to the actual width of the cardboard 100 to be folded. Then, the user fixes the sliding stops 2023 in the current position by means of the matching locking knob, set screw or eccentric handle, thereby forming a width-adjustable limiting structure on the horizontal stop bar 2022.

[0105] In this embodiment, the sliding stop 2023 is used to constrain and position the lid 15 in the left and right directions, and at the same time, it can be adapted to paper boxes of different sizes.

[0106] Reference Figure 6As shown, in one embodiment of the present invention, a lifting support member 80 is further included. The lifting support member 80 is disposed on the base 2012 or the transverse guide rail 2011. The top surface of the lifting support member 80 is at the same height as the top surface of the base 2012, and the height of the top surface of the base 2012 is higher than the positioning height of the stop 202.

[0107] As mentioned above, the top surface of the base 2012 is at a height higher than the positioning height of the stop 202, creating a height difference between the carrier 201 and the stop 202. This height difference design between the carrier 201 and the stop 202 allows the lid 15 to tilt downwards in the middle of its folding state, thus facilitating the subsequent folding of the rear folding ears 11b and 12b of the left side panel 11 and the right side panel 12.

[0108] For larger cardboard boxes, the distance between the two bases 2012 is significant, leaving the middle portion of the rear panel 13 of the cardboard 100 unsupported. In this embodiment, a lifting support 80 is provided on the base 2012 or the transverse guide rail 2011. This lifting support 80 is located between the two bases 2012, and its top surface is at the same height as the top surface of the base 2012. Thus, after the press fold is completed, the lifting support 80 can be used to support the rear panel 13 of the cardboard 100, ensuring the flatness of the rear panel 13. Correspondingly, the box lid 15 remains tilted downwards to avoid the obstruction due to the lower height of the stop 202. This further improves the smoothness and reliability of the entire process from press folding to subsequent manual folding, increasing folding efficiency while also ensuring folding quality.

[0109] Reference Figure 7 As shown, in another embodiment of the present invention, a lifting support member 80 is also included. The lifting support member 80 is disposed on the intermediate guide assembly 70. The top surface of the lifting support member 80 is at the same height as the top surface of the base 2012. The height of the top surface of the base 2012 is higher than the positioning height of the stop 202.

[0110] The difference between this embodiment and the previous embodiment is that the lifting support 80 is not located on the transverse guide rail 2011 or the base 2012, but is located on the intermediate guide assembly 70. Since the intermediate guide assembly 70 is usually located in the middle of the transverse guide rail 2011, and the function of the lifting support 80 is to support the middle part of the rear side plate 13 of the cardboard 100 to be folded, placing the lifting support 80 on the intermediate guide assembly 70 can achieve a good supporting effect and also simplify the structure.

[0111] It is understood that the lifting support 80 in the above two embodiments can be a block structure with a certain height, as long as it has a relatively flat top surface. Furthermore, the lifting support 80 can be fixed to the transverse guide rail 2011, the base 2012, or the intermediate guide assembly 70, or it can be connected to the transverse guide rail 2011, the base 2012, or the intermediate guide assembly 70 in other movable connection methods, such as being connected to the transverse guide rail 2011, the base 2012, or the intermediate guide assembly 70 by horizontal rotation.

[0112] Reference Figure 5 As shown, in one embodiment of the present invention, the position of the front ear stop 40 is adjustable in the vertical direction, and the position of the side stop 50 is adjustable in the front-back direction. In specific applications, a locking knob or bolt assembly can be provided to lock and fix the front ear stop 40 and the side stop 50 after their positions are adjusted, ensuring reliability during use.

[0113] In actual packaging operations, the heights of different types of cardboard boxes vary, causing changes in the spatial positions of the left side panel 11, right side panel 12, and front flaps 11a and 12a relative to the plane of the base plate 10 in the cardboard box 100 to be folded. For cardboard boxes with larger height dimensions, the left side panel 11 and right side panel 12 are wider, and the front flaps 11a and 12a are higher relative to the plane of the carrier 20 in their initial, unclamped state. Therefore, the installation position of the front flap stop 40 needs to be adjusted upwards. At the same time, the side stop 50 needs to be finely adjusted in the front-back direction to ensure that it always acts on the optimal force point of the side panel and does not interfere with the movement trajectory of the front flaps 11a and 12a.

[0114] This embodiment improves the versatility and adaptability of the auxiliary folding device by allowing the front ear stop 40 to be adjusted vertically and the side stop 50 to be adjusted front-back, thus enabling the same device to adapt to the folding needs of various paper boxes of different heights, from flat to deep, through simple mechanical position adjustments.

[0115] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0116] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A cardboard box auxiliary folding device, characterized in that, include: Carrier; Support arm, which is mounted on the carrier frame and is used to support the front side panel of the cardboard to be folded; Bottom stop; The bottom stop is provided on the carrier frame and is used to block the bottom plate of the cardboard to be folded. Two front ear stops are spaced apart on the carrier in the left-right direction, and are used to block the folding of the front ears of the left and right sides of the cardboard to be folded. Two side stops are spaced apart on the carrier in the left-right direction and located behind the two front ear stops, respectively used to block the folding of the left and right sides of the cardboard. When the cardboard to be folded is placed on the carrier and pressed, the front flaps of the left and right sides of the cardboard to be folded fold inward before the bottom plate of the cardboard to be folded.

2. The cardboard box auxiliary folding device according to claim 1, characterized in that, The carrier includes: The base, the front ear block and the side block are disposed on the base; A stop, located behind the carrier, is used to position the lid of the cardboard box to be folded; The positioning height of the stop is lower than the blocking height of any one of the bottom stop, the front ear stop, and the side stop, so that when the cardboard to be folded is placed on the carrier, the cardboard to be folded tilts from top to bottom in the direction from front to back.

3. The cardboard box auxiliary folding device according to claim 2, characterized in that, The top surface of the carrier is at a height higher than the positioning height of the stop.

4. The cardboard box auxiliary folding device according to claim 2, characterized in that, The carrier includes a transverse guide rail and two bases. The transverse guide rail extends in the left-right direction, and the two bases are spaced apart on the transverse guide rail and are slidable in the left-right direction. The stop is slidable relative to the carrier in the front-back direction.

5. The cardboard box auxiliary folding device according to claim 4, characterized in that, The stop includes two longitudinal guide rails and a transverse stop bar; the two longitudinal guide rails correspond one-to-one with the two bases, and one end of each longitudinal guide rail is slidably connected to the corresponding base in the front-back direction. The transverse baffle extends along the left-right direction and is used to position the box lid of the cardboard to be folded in the front-back direction. The other end of the longitudinal guide rail is slidably connected to the transverse baffle in the left-right direction.

6. The cardboard box auxiliary folding device according to claim 4, characterized in that, The stop includes two longitudinal guide rails, two stop blocks, and a transverse stop bar; the two longitudinal guide rails correspond one-to-one with the two bases, and one end of each longitudinal guide rail is slidably connected to the corresponding base in the front-back direction. The two stops are respectively fixed to the other end of the corresponding longitudinal guide rails. Each stop can slide on the transverse stop bar in the left-right direction to position the box lid of the cardboard to be folded in the front-back direction.

7. The cardboard box auxiliary folding device according to claim 5 or 6, characterized in that, The transverse baffle is provided with sliding stops at both ends. The sliding stops can slide along the length of the transverse baffle to position the box lid of the cardboard to be folded in the left-right direction.

8. The paper box auxiliary folding device according to any one of claims 1 to 6, characterized in that, The upper end of the front ear stop has a blocking structure for blocking and folding the front folded ear; The blocking structure includes at least a blocking surface. When the cardboard to be folded is placed on the carrier, the front folding ear is located above the blocking surface, and the blocking surface is inclined from top to bottom in the direction from front to back.

9. The paper box auxiliary folding device according to claim 8, characterized in that, The blocking structure further includes a first guide surface, which intersects with the blocking surface and is located behind the blocking surface. The first guide surface is inclined from top to bottom in a front-to-back direction, and the inclination angle of the first guide surface is greater than the inclination angle of the blocking surface.

10. The paper box auxiliary folding device according to any one of claims 1 to 6, characterized in that, The two side guards are symmetrically arranged in the left-right direction, and each side guard is adjacent to the corresponding front ear guard; the upper end of the side guard has a second guide surface, which is inclined from top to bottom in the direction from the outside to the inside, and the inside is the side of the two side guards facing each other.

11. The paper box auxiliary folding device according to any one of claims 1 to 6, characterized in that, The bottom stop includes a first guide wheel and a second guide wheel. The axes of the first guide wheel and the second guide wheel extend in the left-right direction. The first guide wheel is disposed on the inner side of one of the two front ear stops, and the wheel surface of the first guide wheel is lower than the blocking surface of the front ear stop where it is located. The second guide wheel is disposed on the inner side of the other of the two front ear stops, and the wheel surface of the second guide wheel is lower than the blocking surface of the front ear stop on which it is located.

12. The paper box auxiliary folding device according to claim 11, characterized in that, There are multiple first guide wheels and multiple second guide wheels, and the multiple first guide wheels and multiple second guide wheels are arranged sequentially along an inclined path, which slopes downward from front to back.

13. The paper box auxiliary folding device according to any one of claims 1 to 6, characterized in that, Each of the side stops is also provided with a third guide wheel, the axis of which extends in the front-rear direction and is adjacent to the lower end of the second guide surface.

14. The paper box auxiliary folding device according to claim 13, characterized in that, The diameter of the third guide wheel gradually decreases from front to back.

15. The paper box auxiliary folding device according to any one of claims 1 to 6, characterized in that, The support arm is connected to the upper end of the corresponding front ear block and extends from bottom to top in a direction from back to front.

16. The cardboard box auxiliary folding device according to claim 15, characterized in that, The support arm is pivotally connected to the upper end of the front ear stop and can rotate in the front-back direction to an unfolded state or a folded state.

17. The cardboard box auxiliary folding device according to claim 4, characterized in that, It also includes an intermediate guide assembly disposed between the two front ear stops; The intermediate guide assembly includes a mounting base and a fourth guide wheel disposed on the mounting base. The mounting base is disposed on the carrier, and the axis of the fourth guide wheel extends in the left-right direction, which is used to assist in supporting and guiding the middle area of ​​the bottom plate of the cardboard to be folded during the folding process.

18. The cardboard box auxiliary folding device according to claim 4, characterized in that, It also includes a lifting support, which is mounted on the base or transverse guide rail. The top surface of the lifting support is at the same height as the top surface of the base, and the height of the top surface of the base is higher than the positioning height of the stop.

19. The paper box auxiliary folding device according to claim 17, characterized in that, It also includes a lifting support member, which is disposed on the intermediate guide assembly. The top surface of the lifting support member is at the same height as the top surface of the base, and the height of the top surface of the base is higher than the positioning height of the stop.

20. The paper box auxiliary folding device according to claim 17, characterized in that, The intermediate guide assembly also includes a locking element, the mounting base being slidable in the left-right direction on the carrier, and the locking element being configured to selectively lock the mounting base to the carrier.

21. The paper box auxiliary folding device according to any one of claims 1 to 6, characterized in that, The position of the front ear baffle is adjustable in the vertical direction, and the position of the side baffle is adjustable in the front-back direction.

22. The paper box auxiliary folding device according to any one of claims 1 to 6, characterized in that, The blocking height of the front ear stop is higher than that of the bottom stop.

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