Corrugated paper pre-folding mechanism and automatic folding device

Abstract

The invention discloses a corrugated paper pre-folding mechanism and an automatic folding device. The corrugated paper pre-folding mechanism comprises a paperboard conveying mechanism and a synchronous overall bending mechanism. The synchronous integral bending mechanism comprises a bending chain, a synchronous conveying driving mechanism and an overturning driving mechanism; the bending chains comprise the upper bending chains and the lower bending chains, the two upper bending chains are arranged in the direction perpendicular to the corrugated paper conveying direction, the two lower bending chains are arranged in the direction perpendicular to the corrugated paper conveying direction, and in the vertical projection, the two upper bending chains are located between the two lower bending chains. The synchronous conveying driving mechanism is in power connection with the bending chain, and the speed of driving the bending chain to move by the synchronous conveying driving mechanism is equal to the speed of conveying corrugated paper by the paperboard conveying mechanism; and the turnover driving mechanism is in power connection with the lower bending chain. According to the corrugated paper pre-folding device, corrugated paper can be accurately pre-folded, specified folds are obtained, and a better folding effect can be obtained.

Description

Technical Field

[0001] The invention relates to a folding device, in particular to a corrugated paper pre-folding mechanism and an automatic folding device. Background Art

[0002] Corrugated cardboard is a multi-layer adhesive body, which consists of at least one layer of corrugated core paper and one layer of cardboard. It has high mechanical strength and can withstand collisions and falls during transportation. The actual performance of corrugated boxes depends on three factors: the characteristics of the core paper and cardboard and the structure of the box itself. With its superior performance and good processing performance, corrugated boxes have gradually replaced wooden boxes and other transport packaging containers and become the main force of transport packaging. In addition to protecting goods, facilitating warehousing and transportation, it also plays a role in beautifying and promoting goods.

[0003] In the existing corrugated paper processing process, the corrugated paperboard is sent out from the feeding mechanism, and is successively transported to the printing mechanism, the cutting mechanism, the folding mechanism and the bonding mechanism through the conveying mechanism for processing to form a carton in a folded state, and finally collected and packaged. Further, in the folding process, generally, a crease is first pressed on the corrugated board by a pressing wheel, and then the part to be folded is guided to be folded by a guide rod, such as a box-gluing and folding device for an ultra-large corrugated paper printing linkage line disclosed in the invention application with application publication number CN111605243A, or a crease is deepened or corrected during the flipping process, such as a corrugated paper automatic folding device and method disclosed in the invention application with application publication number CN118684059A.

[0004] The above folding device has the following disadvantages:

[0005] When forming or deepening creases on corrugated paper, it is pressed continuously from one end of the corrugated paper to the other end. Corrugated paper is an object with certain rigidity and flexibility. When the front of the corrugated paper is squeezed, it will cause uncontrollable pulling and deformation at the back of the corrugated paper, resulting in irregular deformation at the back of the corrugated paper, that is, the unpressed part will shift. Even if it is bent closely by the pressure wheel, it is difficult to obtain the ideal specified crease, and the folding effect needs to be improved. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned problems and provide a corrugated paper pre-folding mechanism, which can pre-fold corrugated paper more accurately to obtain specified creases, thereby facilitating better folding effects.

[0007] Another object of the present invention is to provide an automatic corrugated paper folding device.

[0008] The purpose of the present invention is achieved through the following technical solutions:

[0009] A corrugated paper pre-folding mechanism, comprising a paperboard conveying mechanism for conveying corrugated paper and a synchronous overall bending mechanism for overall bending the corrugated paper during the conveying process;

[0010] The synchronous integral bending mechanism comprises a bending chain, a synchronous conveying drive mechanism and a flipping drive mechanism;

[0011] The bending chain includes an upper bending chain and a lower bending chain, wherein two upper bending chains are provided and arranged along a direction perpendicular to the conveying direction of the corrugated paper, and two lower bending chains are provided and arranged along a direction perpendicular to the conveying direction of the corrugated paper, and in a vertical projection, the two upper bending chains are parallelly located between the two lower bending chains;

[0012] The synchronous conveying driving mechanism is dynamically connected to the bending chain, and the speed at which the synchronous conveying driving mechanism drives the bending chain to move is equal to the speed at which the paperboard conveying mechanism conveys the corrugated paper;

[0013] The flipping drive mechanism is dynamically connected to the lower bending chain; in the working state, the corrugated paper is located between the upper bending chain and the lower bending chain, and the flipping drive mechanism drives the lower bending chain to flip upward, and the lower bending chain pushes the folding part of the entire corrugated paper to bend upward around the boundary of the upper bending chain, forming a crease at a position of the corrugated paper corresponding to the boundary of the bending chain.

[0014] The working principle of the above-mentioned corrugated paper pre-folding mechanism is as follows:

[0015] During operation, the corrugated paper to be folded is conveyed by the cardboard conveying mechanism. When the corrugated paper to be folded is conveyed between the upper bending chain and the lower bending chain, the moving speed of the upper bending chain and the lower bending chain is equal to the moving speed of the corrugated paper, so that the upper bending chain, the lower bending chain and the corrugated paper are in a relatively static state. On the one hand, no pulling will be caused when the corrugated paper is bent subsequently, ensuring that the corrugated paper is pre-folded in a correct posture and that the creases meet the specified requirements; on the other hand, the bending work can be carried out during the conveying process without stopping, ensuring high work efficiency.

[0016] When the entire corrugated paper is completely conveyed between the upper bending chain and the lower bending chain, while maintaining synchronous movement, the lower bending chain is driven to flip upwards through the flip driving mechanism. Under the limit of the upper bending chain, the lower bending chain simultaneously pushes the folding part of the entire corrugated paper to bend upwards around the boundary of the upper bending chain. The force is balanced and uniform, avoiding unnecessary deformation and displacement of the corrugated paper, thereby forming a relatively precise crease on the corrugated paper at one time, which is conducive to obtaining a better folding effect.

[0017] In a preferred embodiment of the present invention, a plurality of bending extrusion sheets are provided on the upper bending chain and the lower bending chain, and the bending extrusion sheets are evenly arranged along the upper bending chain and the lower bending chain and respectively form a continuous cycle of extrusion sheet circles. With the above structure, when the plurality of bending extrusion sheets are arranged in a straight line, it is equivalent to a straight plate, thereby providing an action surface close to the whole, increasing the action area, and facilitating the smooth completion of the pre-bending work.

[0018] In a preferred embodiment of the present invention, a support plate is provided on the inner side of the extrusion sheet rings corresponding to the upper bending chain and the lower bending chain, and the support plate is located between the corresponding two sprocket wheels. In this way, a rigid support can be provided to the bending extrusion sheet during bending, so that the bending extrusion sheet can bend the corrugated paper smoothly and in place.

[0019] A preferred embodiment of the present invention, wherein the cardboard conveying mechanism includes a conveying wheel group, a conveying transmission assembly and a conveying drive motor, wherein the conveying wheel group is provided with multiple groups and each group includes conveying wheels arranged relatively up and down; the conveying transmission assembly includes a transmission shaft, a synchronous belt and a synchronous wheel, wherein the transmission shaft is provided with multiple groups and is respectively connected to different conveying wheels.

[0020] Furthermore, the synchronous conveying drive mechanism includes a synchronous drive motor and a synchronous transmission assembly, wherein the synchronous drive motor is composed of a conveying drive motor, and the synchronous transmission assembly is composed of a conveying transmission assembly, wherein the upper bending chain is connected to two transmission shafts located above the conveying transmission assembly through two sprockets; in vertical projection, the conveying wheel is located between the two upper bending chains; and the lower bending chain is connected to two transmission shafts located below the conveying transmission assembly through two sprockets. Through the above structure, the power of the cardboard conveying mechanism can be shared, which not only ensures the same speed, but also simplifies the structure and reduces the cost.

[0021] Furthermore, the sprocket of the lower bending chain is connected to the transmission shaft of the conveying transmission assembly through a universal coupling so that the lower bending chain can be flipped and moved.

[0022] Furthermore, the flip drive mechanism includes a flip mounting frame, a flip drive motor and a flip transmission assembly, wherein the flip mounting frame is fixedly connected to the half shaft of the sprocket of the universal coupling close to the lower bending chain; the flip transmission assembly includes a flip transmission gear and a flip transmission rack, wherein the flip transmission gear is arranged on the output shaft of the flip drive motor, and the flip transmission rack is an arc structure, wherein the flip transmission rack is fixedly connected to the flip mounting frame, and the flip transmission rack is arranged on the frame through an arc guide structure, and the center of the arc guide structure coincides with the rotation center of the corrugated paper bending. Through the above structure, under the drive of the flip drive motor, the flip transmission gear can drive the flip transmission rack to slide on the arc guide structure, and then drive the lower bending chain to flip upward around the center of the arc guide structure, so as to realize the pre-folding of the corrugated paper. Among them, since the center of the arc guide structure coincides with the rotation center of the corrugated paper bending, the lower bending chain will not move relatively during the flipping process, and the corrugated paper will be bent in a relatively static posture, avoiding unnecessary deformation and displacement of the corrugated paper, and further improving the quality of the crease.

[0023] A corrugated paper automatic folding device comprises the corrugated paper pre-folding mechanism.

[0024] A preferred solution of the present invention further comprises a final folding mechanism, which is arranged downstream of the corrugated paper pre-folding mechanism, and the final folding mechanism comprises two folding guide rods arranged opposite to each other.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The corrugated paper pre-folding mechanism of the present invention drives the lower bending chain to flip upward through the flip driving mechanism. Under the limit of the upper bending chain, the lower bending chain simultaneously pushes the folding part of the entire corrugated paper to bend upward around the boundary of the upper bending chain. The force is balanced and uniform, avoiding unnecessary deformation and displacement of the corrugated paper, thereby forming a relatively accurate crease on the corrugated paper at one time, which is conducive to obtaining a better folding effect.

[0027] 2. Since the moving speed of the upper bending chain and the lower bending chain is equal to the moving speed of the corrugated paper, the upper bending chain, the lower bending chain and the corrugated paper are in a relatively static state. On the one hand, no pulling will be caused when the corrugated paper is bent subsequently, ensuring that the corrugated paper is pre-folded in a correct posture and that the creases meet the specified requirements; on the other hand, the bending work can be carried out during the conveying process without stopping, ensuring high work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the automatic corrugated paper folding device of the present invention.

[0029] Figure 2 It is a front view of the corrugated paper pre-folding mechanism of the present invention.

[0030] Figure 3-Figure 4 It is a side view of the corrugated paper pre-folding mechanism of the present invention in two states.

[0031] Figure 5 for Figure 4 Magnified view of the X in .

[0032] Figure 6 It is a partial three-dimensional structural schematic diagram of the corrugated paper pre-folding mechanism of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0034] Combination Figure 1 The automatic folding device for corrugated paper of this embodiment includes a corrugated paper pre-folding mechanism and a formal folding mechanism. The formal folding mechanism is arranged downstream of the corrugated paper pre-folding mechanism. The formal folding mechanism includes two folding guide rods 1 arranged opposite to each other. The specific structure can refer to the prior art.

[0035] Combination Figure 1-Figure 6 The corrugated paper pre-folding mechanism includes a cardboard conveying mechanism for conveying corrugated paper and a synchronous overall bending mechanism for integrally bending the corrugated paper during conveying; the synchronous overall bending mechanism includes a bending chain, a synchronous conveying driving mechanism and a flipping driving mechanism; the bending chain includes an upper bending chain 2 and a lower bending chain 3, the upper bending chain 2 is provided with two and arranged along a direction perpendicular to the conveying direction of the corrugated paper, the lower bending chain 3 is provided with two and arranged along a direction perpendicular to the conveying direction of the corrugated paper, in vertical projection, the two upper bending chains 2 are parallel to the two lower bending chains Chain 3; the synchronous conveying drive mechanism is dynamically connected with the bending chain, and the speed at which the synchronous conveying drive mechanism drives the bending chain to move is equal to the speed at which the cardboard conveying mechanism conveys the corrugated paper; the flipping drive mechanism is dynamically connected with the lower bending chain 3; in the working state, the corrugated paper is located between the upper bending chain 2 and the lower bending chain 3, and the lower bending chain 3 is driven to flip upward by the flipping drive mechanism, and the lower bending chain 3 pushes the folding part of the entire corrugated paper to bend upward around the boundary of the upper bending chain 2, forming a crease at a position of the corrugated paper corresponding to the boundary of the bending chain.

[0036] Combination Figure 2-Figure 6, the upper bending chain 2 and the lower bending chain 3 are both provided with a plurality of bending extrusion sheets 4, and the bending extrusion sheets 4 are evenly arranged along the upper bending chain 2 and the lower bending chain 3 and respectively form a continuous cycle of extrusion sheet circles. Through the above structure, when the plurality of bending extrusion sheets 4 are arranged in a straight line, it is equivalent to a straight plate, so that a nearly overall action surface can be provided, the action area is increased, and it is conducive to the smooth completion of the pre-bending work.

[0037] Combination Figure 2 The inner sides of the extrusion sheet circles corresponding to the upper bending chain 2 and the lower bending chain 3 are both provided with support plates 5, and the support plates 5 are located between the corresponding two sprocket wheels. In this way, rigid support can be provided to the bending extrusion sheet 4 during bending, so that the bending extrusion sheet 4 can bend the corrugated paper smoothly and in place.

[0038] Combination Figure 1-Figure 6 The paperboard conveying mechanism includes a conveying wheel group, a conveying transmission assembly and a conveying drive motor. The conveying wheel group is provided with multiple groups and each group includes conveying wheels 7 arranged opposite to each other up and down; the conveying transmission assembly includes a transmission shaft 8, a synchronous belt and a synchronous wheel. The transmission shaft 8 is provided with multiple and is respectively connected to different conveying wheels 7. Specifically, the conveying wheel groups on the left and right sides along the direction of corrugated paper conveying use different driving mechanisms respectively, operate independently, and can also adjust the wheel spacing to adapt to corrugated paper of different sizes.

[0039] Furthermore, the synchronous conveying drive mechanism includes a synchronous drive motor and a synchronous transmission assembly, wherein the synchronous drive motor is composed of a conveying drive motor, and the synchronous transmission assembly is composed of a conveying transmission assembly, wherein the upper bending chain 2 is connected to two transmission shafts 8 located above the conveying transmission assembly through two sprockets; in vertical projection, the conveying wheel 7 is located between the two upper bending chains 2; and the lower bending chain 3 is connected to two transmission shafts 8 located below the conveying transmission assembly through two sprockets. Through the above structure, the power of the cardboard conveying mechanism can be shared, which not only ensures the same speed, but also simplifies the structure and reduces the cost.

[0040] Combination Figure 3-Figure 6 The sprocket of the lower bending chain 3 is connected to the transmission shaft 8 of the conveying transmission assembly through a universal coupling 9 so that the lower bending chain 3 can be flipped and moved.

[0041] Combination Figure 2-Figure 6The flipping drive mechanism includes a flipping mounting frame 10, a flipping drive motor 11 and a flipping transmission assembly. The flipping mounting frame 10 is fixedly connected to the half-axle of the sprocket of the universal coupling 9 close to the lower bending chain 3; the flipping transmission assembly includes a flipping transmission gear 12 and a flipping transmission rack 13. The flipping transmission gear 12 is arranged on the output shaft of the flipping drive motor 11. The flipping transmission rack 13 is an arc-shaped structure. The flipping transmission rack 13 is fixedly connected to the flipping mounting frame 10. The flipping transmission rack 13 is arranged on the frame through an arc-shaped guide structure. The center of the arc-shaped guide structure coincides with the rotation center of the corrugated paper bending. Through the above structure, under the drive of the flipping drive motor 11, the flipping transmission gear 12 can drive the flipping transmission rack 13 to slide on the arc-shaped guide structure, and then drive the lower bending chain 3 to flip upward around the center of the arc-shaped guide structure, so as to realize the pre-folding of the corrugated paper, such as Figure 4 Among them, since the center of the arc-shaped guide structure coincides with the rotation center of the corrugated paper bending, Figure 5 Therefore, during the flipping process, the lower bending chain 3 will not move relatively, and the corrugated paper will be bent in a relatively static posture, avoiding unnecessary deformation and displacement of the corrugated paper, and further improving the quality of the crease.

[0042] Combination Figure 1-Figure 6 The working principle of the corrugated paper pre-folding mechanism of this embodiment is as follows:

[0043] During operation, the corrugated paper to be folded is conveyed by the cardboard conveying mechanism. When the corrugated paper to be folded is conveyed between the upper bending chain 2 and the lower bending chain 3, the moving speed of the upper bending chain 2 and the lower bending chain 3 is equal to the moving speed of the corrugated paper, so that the upper bending chain 2, the lower bending chain 3 and the corrugated paper are in a relatively static state. On the one hand, no pulling will be caused when the corrugated paper is bent subsequently, so that the corrugated paper is pre-folded in a correct posture and the crease meets the specified requirements; on the other hand, the bending work can be carried out during the conveying process without stopping, so as to ensure high work efficiency.

[0044] When the entire corrugated paper is completely conveyed between the upper bending chain 2 and the lower bending chain 3, while maintaining synchronous movement, the lower bending chain 3 is driven to flip upwards by the flipping drive mechanism. Under the limit of the upper bending chain 2, the lower bending chain 3 simultaneously pushes the folding part of the entire corrugated paper to bend upwards around the boundary of the upper bending chain 2, with balanced and uniform force, avoiding unnecessary deformation and displacement of the corrugated paper, thereby forming a relatively precise crease on the corrugated paper at one time, which is conducive to obtaining a better folding effect.

[0045] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A corrugated paper pre-folding mechanism, characterized in that: It includes a paperboard conveying mechanism for conveying corrugated paper and a synchronous integral bending mechanism for integrally bending the corrugated paper during the conveying process; The synchronous integral bending mechanism comprises a bending chain, a synchronous conveying drive mechanism and a flipping drive mechanism; The bending chain includes an upper bending chain and a lower bending chain, wherein two upper bending chains are provided and arranged along a direction perpendicular to the conveying direction of the corrugated paper, and two lower bending chains are provided and arranged along a direction perpendicular to the conveying direction of the corrugated paper, and in a vertical projection, the two upper bending chains are parallelly located between the two lower bending chains; The synchronous conveying driving mechanism is dynamically connected to the bending chain, and the speed at which the synchronous conveying driving mechanism drives the bending chain to move is equal to the speed at which the paperboard conveying mechanism conveys the corrugated paper; The flipping drive mechanism is dynamically connected to the lower bending chain; in the working state, the corrugated paper is located between the upper bending chain and the lower bending chain, and the flipping drive mechanism drives the lower bending chain to flip upward, and the lower bending chain pushes the folding part of the entire corrugated paper to bend upward around the boundary of the upper bending chain, forming a crease at a position of the corrugated paper corresponding to the boundary of the bending chain.

2. The corrugated paper pre-folding mechanism according to claim 1, characterized in that: The upper bending chain and the lower bending chain are both provided with a plurality of bending extrusion sheets, and the bending extrusion sheets are evenly arranged along the upper bending chain and the lower bending chain and respectively form continuous circulating extrusion sheet circles.

3. The corrugated paper pre-folding mechanism according to claim 2, characterized in that: A support plate is provided on the inner side of the extrusion plate rings corresponding to the upper bending chain and the lower bending chain, and the support plate is located between the corresponding two sprocket wheels.

4. The corrugated paper pre-folding mechanism according to claim 1, characterized in that: The cardboard conveying mechanism includes a conveying wheel group, a conveying transmission assembly and a conveying drive motor. The conveying wheel group is provided with multiple groups and each group includes conveying wheels arranged opposite to each other up and down; the conveying transmission assembly includes a transmission shaft, a synchronous belt and a synchronous wheel. The transmission shaft is provided with multiple groups and is respectively connected to different conveying wheels.

5. The corrugated paper pre-folding mechanism according to claim 4, characterized in that: The synchronous conveying drive mechanism includes a synchronous drive motor and a synchronous transmission assembly. The synchronous drive motor is composed of a conveying drive motor, and the synchronous transmission assembly is composed of a conveying transmission assembly. The upper bending chain is connected to two transmission shafts located above the conveying transmission assembly through two sprockets.

6. The corrugated paper pre-folding mechanism according to claim 5, characterized in that: In vertical projection, the conveying wheel is located between the two upper bent chains; the lower bent chain is connected to two transmission shafts of the conveying transmission assembly located below through two sprockets.

7. The corrugated paper pre-folding mechanism according to claim 5, characterized in that: The sprocket of the lower bending chain is connected to the transmission shaft of the conveying transmission assembly through a universal coupling.

8. The corrugated paper pre-folding mechanism according to claim 7, characterized in that: The flip driving mechanism includes a flip mounting frame, a flip driving motor and a flip transmission assembly. The flip mounting frame is fixedly connected to the half-axle of the sprocket of the universal coupling close to the lower bending chain; the flip transmission assembly includes a flip transmission gear and a flip transmission rack. The flip transmission gear is arranged on the output shaft of the flip driving motor. The flip transmission rack is an arc structure. The flip transmission rack is fixedly connected to the flip mounting frame. The flip transmission rack is arranged on the frame through an arc guide structure. The center of the arc guide structure coincides with the rotation center of the corrugated paper bending.

9. An automatic corrugated paper folding device, characterized in that: It comprises the corrugated paper pre-folding mechanism as described in any one of claims 1-8.

10. The automatic corrugated paper folding device according to claim 9, characterized in that: The invention also comprises a final folding mechanism, which is arranged downstream of the corrugated paper pre-folding mechanism and comprises two folding guide rods arranged opposite to each other.

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