Paperboard line pressing device

Abstract

The paperboard line pressing device comprises an upper pressing assembly and a lower pressing assembly. The upper pressing assembly comprises rigid upper armor units and an upper base plate, the multiple upper armor units are connected end to end to form an upper armor layer capable of annularly rotating, and the upper armor layer comprises an upper chord section arranged in the moving direction of the paperboard; the rigid upper supporting plate is provided with an upper supporting face which faces downwards and is continuously arranged, the upper supporting face is arranged above the upper chord section and provides continuous support for at least two adjacent upper armor units in the upper chord section, and the upper base plates of the supported upper armor units are combined to form an upper channel wall; the lower pressing assembly comprises rigid lower armor units, each lower armor unit comprises a lower base plate, a plurality of lower armor units are connected end to end to form a lower armor layer capable of annularly rotating, and the lower armor layer comprises a lower chord section arranged in the moving direction of the paperboard; the upper supporting surface of the upper supporting plate and the lower supporting surface of the lower supporting plate are oppositely arranged up and down; unit convex ribs which protrude outwards and are arranged in the paperboard moving direction are arranged in the center area of an upper base plate of the upper armor unit or a lower base plate of the lower armor unit, the front-back adjacent unit convex ribs are connected in a front-back mode to form a convex rib set, the upper channel wall and the lower channel wall are oppositely arranged in the vertical direction, and a paper passing channel is formed between the upper channel wall and the lower channel wall. And the unit convex ribs are used for forming continuous bending marks on the paperboard when the paperboard passes through the paper passing channel.

Description

Technical Field

[0001] The invention relates to the technical field related to cardboard processing, and in particular to a cardboard pressing device. Background Art

[0002] Cartons are the most commonly used and indispensable packaging materials. Common cartons are usually made of corrugated cardboard. The general production process of cartons is as follows: 1. Cutting, pressing out the longitudinal folding lines while cutting the height of the cardboard; 2. Printing, using a printing machine to print patterns on the outer surface of the cardboard; 3. Pressing, using a press machine to press out transverse folding lines on the cardboard; 4. Slotting, using a slotting machine to open slots for the cover and bottom of the cardboard; 5. Joining, using a nailing machine or a gluing machine to join the carton and reshape it.

[0003] Among them, the quality of the crimping process affects the joint forming effect of the carton and the compressive strength of the carton. How to improve the quality of crimping is a common problem for every carton manufacturer. The most common crimping process currently uses a combination of an upper roller and a lower roller for rolling crimping. The upper roller and the lower roller are aligned up and down. A circle of ribs is set on the outer cylindrical surface of the upper roller. The outer cylindrical surface of the lower roller is a flat surface. When the cardboard passes through the gap between the upper roller and the lower roller, the ribs on the upper roller roll the cardboard to form a crimping line. This roller crimping process has the following disadvantages. Since the upper roller and the lower roller are both small-diameter circular rollers, the contact between the ribs, the lower roller and the cardboard is point contact, and the force-bearing area of ​​the cardboard is small. The cardboard is easily crushed by the ribs when it is pressed, which results in a low production yield of the carton and increased costs.

[0004] In order to solve the problems of the existing crimping process, people have improved the crimping equipment. For example, the Chinese invention patent with the publication number CN107097455A discloses a corrugated cardboard crimping structure, which includes a crimping belt above the longitudinal crimping line and a crimping belt below the longitudinal crimping line. The crimping belt below the longitudinal crimping line is provided with a protrusion A. The upper and lower crimping belt structures are adopted, and the crimping distance is extended. The force-bearing area of ​​the cardboard being processed is larger and it is not easy to be crushed. However, this crimping belt structure has another problem. The crimping belt needs to rotate. Not only is the main body of the belt relatively soft, but the protrusion A set on the lower crimping belt also needs to be made of soft material. Moreover, the long-distance crimping belt has no support. When the cardboard passes through, the protrusion A does not make enough indentation on the cardboard, resulting in unclear crimping. In the later joining process, the cardboard is difficult to fold and cannot be accurately formed, which affects the squareness and appearance of the carton. Summary of the invention

[0005] In order to overcome at least one of the above problems existing in the cardboard pressing line equipment in the prior art, the present invention provides a cardboard pressing line device, comprising an upper pressing component and a lower pressing component; The upper pressing assembly includes a plurality of rigid upper armor units arranged adjacent to each other in front and back, and the adjacent upper armor units rotate relative to each other, each of the upper armor units includes an upper base plate, and the plurality of upper base plates are connected end to end to form an upper armor layer that can rotate in a ring, and the upper armor layer includes an upper chord segment arranged along the moving direction of the paperboard; and also includes a rigid upper support plate, the upper support plate has an upper support surface facing downward, the upper support surface is arranged above the upper chord segment and provides continuous support for at least two adjacent upper armor units in the upper chord segment, and the upper base plates of the supported upper armor units are combined to form an upper channel wall; The lower pressing assembly includes a plurality of rigid lower armor units arranged adjacent to each other in front and back, the adjacent lower armor units rotate relative to each other, each lower armor unit includes a lower base plate, and the plurality of lower base plates are connected end to end to form a lower armor layer that can rotate in an annular manner, and the lower armor layer includes a lower chord segment arranged along the moving direction of the paperboard; and further includes a rigid lower support plate, the lower support plate having a lower support surface facing upward, the lower support surface is arranged below the lower chord segment and provides continuous support for at least two adjacent lower armor units in the lower chord segment, and the lower base plates of the supported plurality of lower armor units are combined to form a lower channel wall; The upper support surface of the upper support plate and the lower support surface of the lower support plate are arranged opposite to each other up and down; A unit convex rib protruding outward and arranged along the moving direction of the paperboard is provided in the central area of ​​the upper base plate of the upper armor unit or the lower base plate of the lower armor unit, and the front and rear adjacent unit convex ribs are connected front and back to form a convex rib group, the upper channel wall and the lower channel wall are arranged opposite to each other in the up and down direction and form a paper passing channel therebetween, and the unit convex rib is used to form a continuous indentation on the paperboard in the paper passing channel.

[0006] The upper pressing assembly and the lower pressing assembly are the main components for pressing the cardboard passing through, and are respectively installed on the upper support frame and the lower support frame arranged up and down; by adjusting the positions of the upper support frame and the lower support frame, the pressing position and the pressing depth can be adjusted to adapt to different production requirements. The upper pressing assembly includes a plurality of sections of the upper armor unit, and the lower pressing assembly includes a plurality of sections of the lower armor unit, and each section of the upper armor unit or the lower armor unit is an independent rigid component.

[0007] The upper armor unit or the lower armor unit is a rigid component that works in contact with the paperboard. In order to better extrude the indentation line on the paperboard, the upper armor unit is generally made of hard metal such as stainless steel, cast steel, or hard non-metallic materials such as hard plastics with high structural strength and strong anti-deformation ability. Similarly, the rigid upper support plate or the lower support plate is generally made of hard metal such as stainless steel, cast steel, or hard non-metallic materials such as hard plastics with high structural strength and strong anti-deformation ability.

[0008] In order to realize the relative rotation between the front and rear adjacent upper armor units, upper side plates can be respectively arranged on the left and right sides of the upper base plate, and the front and rear adjacent upper armor units can realize relative rotation connection by means of the hinge structure between the front and rear adjacent upper side plates. The front and rear adjacent upper armor units can also be realized by overlapping the front and rear adjacent upper side plates and hinged on a rotating shaft. The front and rear adjacent upper armor units can also be realized by hingedly connecting the front and rear upper side plates respectively through auxiliary connecting plates. The same structure is applicable to the relative rotation connection formed between the lower armor units.

[0009] In order to reduce the damage of the cardboard, the connection between the upper side plate and the upper base plate and the connection between the lower side plate and the lower base plate are generally provided with transition fillets. In order to allow the two adjacent upper base plates or the two adjacent lower base plates to be smoothly connected at the head and tail, the head and tail ends of the upper armor unit or the lower armor unit have at least the following two structures. The first structure is that both ends are vertical sections, so that the two armor units can be connected together through relative planes; the second structure is a head-to-tail overlap structure, one end of the upper base plate and the lower base plate is provided with an overlap edge protruding outward, and the other end is provided with an inward recessed step. When the two adjacent upper armor units or lower armor units are connected, the overlap edge can overlap the step of the adjacent upper armor unit or lower armor unit so that the two adjacent upper base plates or lower base plates are connected together, and the outer surfaces of the two adjacent upper base plates or lower base plates connected are flush.

[0010] Among them, the upper armor layer refers to an annular cover plate layer composed of multiple sections of the upper base plate connected end to end. Under the support of the upper support plate, the upper base plate with multiple sections connected end to end can form a stable upper channel wall structure on a certain line segment path. The lower armor layer refers to an annular cover plate layer composed of multiple sections of the lower base plate connected end to end. Under the support of the lower support plate, the lower base plate with multiple sections connected end to end can form a stable lower channel wall structure on a certain line segment path. The upper armor layer can rotate in a circle under the drive of the upper driving wheel. Similarly, the lower armor layer can also rotate in a circle, which can not only drive the cardboard to move forward, but also press out the indentation line while the cardboard moves.

[0011] The upper substrate and the lower substrate are plate-shaped basic components for bearing pressure. The width of the upper substrate or the lower substrate is greater than the width of the pressing line (the indentation set in the process), and the upper substrate or the lower substrate located on the paper feeding channel can be fully or partially pressed onto the paperboard in the indentation width direction. The larger pressing surface can improve the bonding transmission force. In addition, the outer surface shape of the upper substrate is relatively flexible, generally a plane or a curved surface with a larger diameter, and the surface is flat.

[0012] Among them, the upper support plate is a basic component with good rigidity fixed on the upper support frame. The upper support plate is provided with a continuous long strip plate-like structure for support. The surface of the plate-like structure facing downward is the upper support surface. In order to achieve a smooth support effect, the upper support surface is a continuous and smooth surface, and the surface has no protrusions or recessed structures that hinder the sliding of the upper armor unit. The upper support plate is a component that provides support for the upper armor unit. There are at least two types of connection relationships between the two. The first type is that the upper support plate directly supports the upper base plate of the upper armor unit, and the inner wall surface of the upper base plate of the upper armor unit can slide on the upper support surface; the second type is that the upper pressing assembly also includes an upper ring chain, and the upper ring chain includes a rotatable upper roller. The upper ring chain is arranged between the upper support plate and the upper armor layer, and the upper roller is connected to the upper support surface in a rolling manner, that is, when the upper ring chain rotates, the upper roller rolls on the upper support surface. The same is true for the lower support plate.

[0013] Among them, the upper supporting surface of the upper supporting plate and the lower supporting surface of the lower supporting plate are arranged relative to each other in the upper and lower directions, which means that the upper supporting surface and the lower supporting surface form a face-to-face positional relationship in the upper and lower directions. In order to form the paper feeding channel, the projections of the two supporting surfaces in the upper and lower directions are at least partially overlapped, and the two supporting surfaces are preferably basically centrally aligned in the upper and lower directions; this enables the upper armor layer and the lower armor layer supported by them to be arranged relative to each other when moving, thereby maximizing the paper feeding channel and maintaining a stable posture.

[0014] According to the above technical solution, compared with the prior art, the beneficial technical effects of the present invention are: First, an upper chord section of the upper armor layer forms a stable and rigid upper channel wall under the support of the upper support surface of the upper support plate, and a lower chord section of the lower armor layer forms a stable and rigid lower channel wall under the support of the lower support surface of the lower support plate. Combined with the unit convex ribs arranged on the upper armor unit or the lower armor unit, the paperboard can be pressed by the rigid upper laminate and the lower laminate when passing through the paper feeding channel, and a clear pressing line can be pressed by the convex rib group composed of a plurality of unit convex ribs. Since the surface area of ​​the upper channel wall and the lower channel wall pressed on the paperboard is larger than that of the roller in the prior art, the paperboard will not be broken due to excessive local pressure, thereby greatly improving the production yield and reducing the production cost; Second, the upper armor layer is composed of multiple rigid upper base plates connected end to end, and the lower armor layer is composed of multiple rigid lower base plates connected end to end. The upper armor layer and the lower armor layer formed by the combination are annular belt-shaped components. This structure can rotate back and forth under the drive of the driving wheel, which can adapt to the forward movement of the paperboard, but in the state where there is no limit in the upper and lower directions, the single-section armor unit will jump up and down; for this purpose, the upper support plate and the lower support plate are increased in rigidity, and the upper channel wall formed when the multiple sections of the upper armor units are supported by the upper support plate is also rigid. Similarly, the lower channel wall is also rigid. Through the combination of the rigid upper channel wall and the lower channel wall, a clear pressing line can be pressed on the paperboard. The present invention utilizes the flexibility of the upper armor layer and the lower armor layer to rotate in an annular manner, and cooperates with the rigid support and stable cooperation of the upper armor layer and the lower armor layer, the upper support plate and the lower support plate. The two can cooperate to rotate the paper and improve the pressing line quality.

[0015] A further solution may be that the upper pressing assembly also includes an upper ring chain composed of a plurality of upper chain links connected end to end, the upper chain link includes an upper roller and an upper roller installed on the upper roller and rotatable, the upper roller is a roller or a bearing, a section of the upper armor unit is connected to the upper ring chain by connecting two upper rollers arranged at intervals, the upper base plate of the upper armor unit is laid on the outer side of the upper roller and the upper roller, the upper roller can roll on the upper supporting surface of the upper support plate, the upper supporting surface of the upper support plate can support the upper rollers on at least three of the upper rollers in the upper ring chain, thereby stably supporting the two adjacent sections of the upper chain connected to the three upper rollers. The lower pressing assembly also includes a lower ring chain composed of a plurality of lower chain links connected end to end, the lower chain link includes a lower roller and a lower roller mounted on the lower roller and rotatable, the lower roller is a roller or a bearing, a section of the lower armor unit is connected to the lower ring chain by connecting two lower rollers arranged at intervals, the lower base plate of the lower armor unit is laid on the outer side of the lower roller and the lower roller, the lower roller can roll on the lower supporting surface of the lower support plate, the lower supporting surface of the lower support plate can support the lower rollers on at least three of the lower rollers in the lower ring chain, thereby stably supporting the two adjacent sections of the lower armor unit corresponding to the three lower rollers.

[0016] Among them, the upper chain link is a basic component of the upper ring chain, which includes at least one upper roller and an upper roller mounted on the upper roller and rotatable. In order to connect multiple sections of the upper chain to form a continuous chain, each section of the upper chain link also includes at least one pair of upper chain link plates, and the upper chain link plates of two adjacent sections of the upper chain link overlap each other and are connected together by a common upper roller. Taking the upper chain link plate as an example, there are at least three specific manifestations. The first is that the upper chain link plate is a plate-shaped component that is not subordinate to the upper armor unit, and the two upper chain link plates arranged at intervals on the left and right are a pair. A pair of upper chain link plates are connected to the adjacent two upper rollers by rotation, and multiple pairs of upper chain link plates are connected to form an annular belt structure similar to a bicycle chain belt. The second is that the upper armor unit also includes an upper base plate and an upper side plate connected to the left and right sides of the upper base plate. The upper side plate is directly connected to the adjacent two upper rollers as an upper chain link plate, and the upper side plate is overlapped and connected to form an annular belt structure. The third type is that the upper link plate is a combination of the above two types.

[0017] Among them, the upper supporting surface of the upper supporting plate supports the upper rollers on at least three of the upper rollers, so as to stably support the two adjacent upper armor units connected to the three upper rollers. Two simplest implementation modes are described here. In the first implementation mode, although one upper armor unit is connected to two spaced-apart upper rollers, two adjacent upper armor units may be connected together through a common upper roller, so that the upper rollers on the three upper rollers connected to the two upper armor units are supported to achieve stability; in the second implementation mode, two adjacent upper armor units are each connected to two upper rollers, and then connected together through a pair of upper chain link plates. At this time, the upper rollers on the four upper rollers connected to the two upper armor units are all supported to achieve stability.

[0018] The upper roller and the lower roller are rollers or bearings, and the two schemes can be selected according to different load conditions. Through the rollers or bearings, rolling transmission between the support surface of the support plate can be achieved.

[0019] The advantages of providing the upper ring chain and the lower ring chain are as follows: First, the upper annular chain is arranged between the upper armor layer and the upper support plate, and the upper roller on the upper annular chain can roll on the upper support surface of the upper support plate, that is, a rolling connection is added between the upper armor layer and the upper support plate, so that the upper armor layer can move back and forth more smoothly along the upper support plate, and similarly, the lower armor layer can also move back and forth smoothly along the lower support plate, which greatly improves the smoothness of the upper armor layer and the lower armor layer moving on the upper support plate and the lower support plate, and also greatly improves the service life of the equipment; Second, each of the upper armor units or lower armor units is connected to two of the upper rollers or lower rollers. When the upper support plate or the lower support plate supports the two upper rollers or the lower rollers, the upper armor unit or the lower armor unit can be stably supported in a plane and will not swing in the up and down directions. Such a structure is conducive to keeping the upper channel wall and the lower channel wall stable, so as to improve the quality of the wire pressing and ensure that the wire pressing is straight and the depth is uniform.

[0020] Since the present invention has the above characteristics and advantages, it can be applied to a cardboard pressing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the structure of the cardboard pressing device in a front view direction; Figure 2 is a schematic diagram of the exploded structure of the cardboard pressing device; Figure 3 is a schematic diagram of the structure of the upper pressing assembly in a front view; Figure 4 is a schematic diagram of the exploded structure of the upper pressing assembly; Figure 5 is a schematic structural diagram of the lower pressing assembly in a front view; Figure 6 is a schematic diagram of the exploded structure of the lower pressing assembly; Figure 7 is a schematic diagram of the axial structure of the upper armor unit and the upper support plate in a connected state, the first connection structure; Figure 8 is a schematic diagram of the cross-sectional structure of the upper armor unit and the upper support plate, a first connection structure; Fig. 9 is a schematic diagram of the axial structure of the lower armor unit applied to the first connection structure; Fig.10 is a schematic diagram of the axial structure of the upper armor unit and the upper chain link in a connection state, which is a second connection structure; Fig.11 is a schematic diagram of the cross-sectional structure of the upper armor unit and the upper chain link, a second connection structure; Fig.12 yes Fig.11 Schematic diagram of the cross-sectional structure in the AA direction; Fig.13 is a schematic diagram of the axial structure of the upper armor unit and the upper chain link in a connection state, which is a third connection structure; Fig.14 is a schematic diagram of the cross-sectional structure of the upper armor unit and the upper chain link, a third connection structure; Fig.15 is a schematic diagram of the axial direction structure of the upper armor unit used in the third connection structure; Fig.16 is a schematic diagram of the axial structure of the upper support plate applied to the third connection structure; Fig.17 is a schematic diagram of the axial structure of the upper driving wheel, the upper driven wheel and the upper support plate; Fig.18 is a schematic structural diagram of the upper driving wheel, the upper driven wheel and the upper supporting plate in a front view; Fig.19 yes Fig.18 Schematic diagram of the cross-section structure in the middle BB direction; Fig. 20 yes Fig.18 Schematic diagram of the cross-section structure in the CC direction; Fig.21 It is a schematic diagram of the axial structure of the lower driving wheel, the lower driven wheel and the lower supporting plate. DETAILED DESCRIPTION

[0022] The structure of the cardboard crimping device using the technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0023] Except for those explicitly stated to be equivalent or alternative implementation schemes, the various implementation details disclosed below can be selectively applied or combined in one embodiment even if they are not directly related or synergistic in terms of functions.

[0024] like Figure 1 to Figure 9 As shown, a cardboard pressing device comprises an upper pressing assembly and a lower pressing assembly which are arranged at intervals and used in combination, the upper pressing assembly comprises a plurality of rigid upper armor units 2 which are arranged front and back adjacently, the upper armor units 2 which are adjacent to each other rotate relative to each other, each of the upper armor units 2 comprises an upper base plate 21, and a plurality of upper base plates 21 are connected end to end to form an upper armor layer 20 which can rotate in an annular manner, the upper armor layer 20 comprises an upper chord segment 201 which is arranged along the moving direction of the cardboard; and further comprises a rigid upper support plate 3, the upper support plate 3 comprises an upper support surface 31 which faces downwards, the upper support surface 31 is arranged above the upper chord segment 201 and provides continuous support for at least two adjacent upper armor units 2 in the upper chord segment 201, and the upper base plates 21 of the supported plurality of upper armor units 2 are combined to form an upper channel wall 202; The lower pressing assembly includes a plurality of rigid lower armor units 5 arranged adjacent to each other in front and back, and the adjacent lower armor units 5 rotate relative to each other, each lower armor unit 5 includes a lower base plate 51, and the plurality of lower base plates 51 are connected end to end to form a lower armor layer 50 that can rotate in an annular manner, and the lower armor layer 50 includes a lower chord segment 501 arranged in the moving direction of the cardboard; and also includes a rigid lower support plate 6, and the lower support plate 6 has a lower support surface 61 facing upward, and the lower support surface 61 is arranged below the lower chord segment 501 and provides continuous support for at least two adjacent lower armor units 5 in the lower chord segment 501, and the supported plurality of The lower base plate 51 of the lower armor unit 5 is combined to form a lower channel wall 502; the upper support surface 31 of the upper support plate 3 and the lower support surface 61 of the lower support plate 6 are arranged opposite to each other up and down; a unit convex rib 7 protruding outward and arranged along the moving direction of the paperboard is provided in the central area of ​​the upper base plate 21 of the upper armor unit 2 or the lower base plate 51 of the lower armor unit 5, and the adjacent unit convex ribs 7 are connected front and back to form a convex rib group 70, the upper channel wall 202 and the lower channel wall 502 are aligned in the up and down direction and form a paper passing channel 100 therebetween, and the unit convex rib 7 is used to form a continuous indentation on the paperboard in the paper passing channel 100.

[0025] The upper pressing assembly and the lower pressing assembly are the main components used to press lines (indentations) on the passing cardboard, and are respectively installed on the upper support frame and the lower support frame arranged up and down. By adjusting the positions of the upper support frame and the lower support frame, the pressing line position and the pressing line depth can be adjusted to adapt to different production requirements. The upper pressing assembly and the lower pressing assembly are basically the same in structure except that the upper and lower positions and the arrangement positions of the unit convex ribs 7 are different. The following mainly takes the structure of the upper pressing assembly as an example for detailed description.

[0026] like Figure 1~Figure 4 As shown, the upper pressing assembly includes an upper driving wheel 81, an upper driven wheel 82 and an upper driving motor 83. The upper armor layer 20 is connected to the upper driving wheel 81 and the upper driven wheel 82 to form a runway-shaped ring. The upper driving motor 83 can drive the upper driving wheel 81 to rotate, thereby driving the upper armor layer 20 to rotate. Among them, the upper chord segment 201 refers to a physical length of the upper armor layer 20 in the shape of a ring, which is located at the lower part close to the side of the lower pressing assembly. The physical length of the upper chord segment 201 includes both the upper armor unit 2 and the upper chain link 1.

[0027] The upper armor unit 2 is a rigid unit component located at the outermost layer of the upper pressing assembly and is a component in contact with the paperboard. In order to better emboss the indentation on the paperboard, the upper armor unit 2 is generally made of hard metal (such as stainless steel, cast steel, aluminum alloy, copper alloy, etc.) or non-metallic hard plastic (such as POM, PBT, PA, etc.) with high structural strength and strong anti-deformation ability. Secondly, the lower armor unit 5 and the upper support plate 3 and the lower support plate 6 are also rigid parts, generally made of hard metal (such as stainless steel, cast steel, aluminum alloy, copper alloy, etc.) or non-metallic hard plastic (such as POM, PBT, PA, etc.) with high structural strength and strong anti-deformation ability.

[0028] The upper armor unit 2 includes an upper base plate 21 and upper side plates 22 connected to the left and right sides of the upper base plate 21. The connection between the upper side plates 22 and the upper base plate 21 is generally provided with a transition fillet. Similarly, the lower armor unit 5 includes a lower base plate 51 and lower side plates 52 connected to the left and right sides of the lower base plate 51.

[0029] The upper armor layer 20 is a cover layer composed of multiple sections of upper base plates 21 that are connected and connected end to end by rotating relative to each other. In order to allow the two adjacent armor units to be connected as close as possible, the upper base plates 21 have at least the following two structures at both ends. In the first structure, both ends of the upper armor unit 2 are vertical sections, so that the two adjacent upper armor units 2 can be connected together through relative planes; the second structure is a head-to-tail overlapping structure, one end of the upper base plate 21 is provided with an overlapping edge 23 protruding outward, and the other end is provided with an inwardly recessed step 24. When two adjacent upper armor units 2 are connected, the overlapping edge 23 can overlap the step 24 of the adjacent upper armor unit 2 so that the two adjacent upper base plates 21 are fitted and connected together, and the outer surfaces of the two adjacent upper base plates 21 connected are flush.

[0030] The upper support plate 3 is a rigid base component fixed on the upper support frame. A continuous long plate-shaped structure for support is provided on the upper support plate 3. The surface of the plate-shaped structure facing downward is the upper support surface 31. In order to achieve a smooth support effect, the upper support surface 31 is a continuous and smooth surface without any protrusions or recessed structures that hinder sliding.

[0031] The connection method between the upper armor unit 2 and the upper support plate 3 is described below with reference to several specific embodiments.

[0032] The first embodiment, as a most basic application implementation method, is as follows: Figure 7~Figure 9As shown, the upper support plate 3 is a component for supporting the upper armor unit 2, and the upper armor layer 20 and the upper support plate 3 are in a directly connected structural relationship, that is, the upper support surface 31 of the upper support plate 3 can be directly pressed on the inner side surface of the upper base plate 21 of the upper armor unit 2, and the two are slidably connected, and the upper support surface 31 can simultaneously support at least two sections of the upper armor unit 2, but according to needs, the upper support surface 31 can also simultaneously support, for example, 2 sections, 3 sections, 4 sections, 5 sections or more than ten sections of the upper armor unit 2, as long as the length of the upper support surface 31 and the length of the upper chord segment 201 are changed accordingly, so that a section of the upper chord segment 201 of the upper armor layer 20 is supported on the upper support surface 31 of the upper support plate 3. The upper channel wall 202 is supported to be stable and rigid; similarly, a lower chord section 501 of the lower armor layer 50 is supported by the lower support surface 61 of the lower support plate 6 to form the lower channel wall 502 which is stable and rigid. Combined with the unit convex ribs 7 arranged on the upper base plate 21 or the lower base plate 51, when the paperboard passes through the paper feeding channel 100, it can be clamped and pressed by the rigid upper channel wall 202 and the lower channel wall 502 from top to bottom and pressed with clear indentations by the convex rib group 70 composed of a plurality of unit convex ribs 7. Since the surface area of ​​the upper channel wall 202 and the lower channel wall 502 pressed on the paperboard is large, the paperboard will not be broken due to excessive local pressure, thereby greatly improving the production yield and reducing the production cost.

[0033] In this embodiment, the upper armor unit 2 also includes upper side plates 22 connected to the left and right sides of the upper base plate 21. The upper side plates 22 of two adjacent upper armor units 2 can be directly rotated and hinged together or connected together through an external connecting plate, and the upper base plate 21 and the upper side plates 22 on the left and right sides are combined to form a groove structure (i.e., defining the upper roller cavity mentioned below), so that the upper armor unit 2 can be sleeved on the upper support plate 3 through the groove structure to limit the movement (rocking) of the upper armor unit 2 in the left and right directions, which is beneficial to improve the stability of the upper channel wall 202 in the left and right directions. The upper armor layer 20 is composed of multiple sections of rigid upper base plates 21 of the upper armor unit 2 connected end to end, and the lower armor layer 50 is composed of multiple sections of rigid lower base plates 51 of the lower armor unit 5 connected end to end. The upper armor layer 20 and the lower armor layer 50 formed by the combination are annular belt-shaped components as a whole, similar to steel tracks. This structure can be bent and rotate back and forth under the drive of the driving wheel, and can well adapt to the forward movement of the paperboard; since the upper armor unit 2, the lower armor unit 5, the upper support plate 3 and the lower support plate 6 are all rigid components, the upper channel wall 202 and the lower channel wall 502 used for pressing the paperboard are also rigid. Through the two rigid upper channel walls 202 and the lower channel wall 502 combined with the rib group 70, a clear pressing line can be pressed on the paperboard. The present invention utilizes the flexibility of the upper armor layer 20 and the lower armor layer 50 that can rotate in an annular manner and cooperates with the rigidity of the upper support plate 3 and the lower support plate 6, so as to realize paper feeding and improve the pressing line quality.

[0034] The second embodiment, such as Figure 1 to Figure 6 as well as Figure 10~Figure 12As shown, as an improvement of the first basic embodiment, the upper pressing assembly also includes an upper ring chain 10 composed of multiple upper chain links 1 connected end to end, the upper chain link 1 includes an upper roller 11 and an upper roller 12 installed on the upper roller 11 and rotatable, wherein the upper roller 12 is a roller or a bearing, and a section of the upper armor unit 2 is connected to the upper ring chain 10 by connecting two upper rollers 11 arranged at intervals, and the upper base plate 21 of the upper armor unit 2 is laid on the outer side of the upper roller 11 and the upper roller 12, and the upper ring chain 10 is connected to the upper driving wheel 81 and the upper driven wheel 82, and when the upper driving wheel 81 rotates, it can drive the upper armor layer 20 to rotate. The upper roller 12 can roll on the upper support surface 31 of the upper support plate 3, and the upper support surface 31 of the upper support plate 3 can support the upper rollers 12 on at least three of the upper rollers 11 in the upper ring chain 10, thereby stably supporting the two adjacent sections of the upper armor units 2 corresponding to the three upper rollers 11. Similarly, the lower pressing assembly also includes a lower circular chain 40 composed of multiple lower chain links 4 connected end to end, the lower chain link 4 includes a lower roller 41 and a lower roller 42 installed on the lower roller 41 and can rotate, wherein the lower roller 42 is a roller or a bearing, and a section of the lower armor unit 5 is connected to the lower circular chain 40 by connecting two spaced lower rollers 41, and the lower base plate 51 of the lower armor unit 5 is laid on the outer side of the lower roller 41 and the lower roller 42, and the lower roller 42 can roll on the lower supporting surface 61 of the lower support plate 6, and the lower supporting surface 61 of the lower support plate 6 can support the lower rollers 42 on at least three of the lower rollers 41 in the lower circular chain 40, thereby stably supporting the two adjacent lower armor units 5 corresponding to the three lower rollers 41.

[0035] The upper chain link 1 is a basic component of the upper ring chain 10. Each of the upper chain links 1 includes at least one upper roller 11 and an upper roller 12 mounted on the upper roller 11 and rotatable. In order to connect multiple upper chain links 1 to form a continuous chain, each of the upper chain links 1 also includes at least one pair of upper chain link plates 13. The upper chain link plates 13 of two adjacent upper chain links 1 are overlapped end to end and are rotatably connected (hinged) together through a common upper roller 11. The specific manifestations of the upper chain link 1 include at least the following three forms. The first form is that the upper chain link plate 13 is a plate-shaped component that is not subordinate to the upper armor unit 2. The two upper chain link plates 13 arranged at intervals on the left and right are a pair. A pair of upper chain link plates 13 is rotatably connected to two adjacent upper rollers 11. Multiple pairs of upper chain link plates 13 are overlapped end to end to form an annular belt structure similar to a bicycle chain belt. The second type is that since the upper armor unit 2 includes an upper base plate 21 and upper side plates 22 connected to the left and right sides of the upper base plate 21, the upper side plates 22 directly serve as upper chain link plates 13 to connect two adjacent upper rollers 11, and the upper armor unit 2 is connected to the upper rollers 11 through the upper side plates 22, and then overlapped end to end to form an annular belt structure. The upper base plate 21 and the upper side plates 22 define an upper roller cavity 25, and at least part of the upper rollers 12 are arranged in the upper roller cavity 25. The third type is as follows Fig.10 As shown, it is a combination of the above two methods, the upper side plate 22 of the upper armor unit 2 is directly used as a connection to the upper link plate 13, and an auxiliary upper link plate 131 is also provided between the outer sides (or inner sides) of the front and rear upper side plates 22 for overlapping connection; at this time, an independent upper link plate 13 can also be provided on the outer side (or inner side) of the upper side plate 22 to reinforce the connection strength of the front and rear upper rollers 11 (the upper link plate 13 and the auxiliary upper link plate 131 here are only provided for the purpose of explanation without identification, and are actually the same component). The upper annular chain 10 is arranged between the upper armor layer 20 and the upper support plate 3, and the upper roller 12 on the upper annular chain 10 can roll on the upper support surface 31 of the upper support plate 3, that is, a rolling connection is formed between the upper armor layer 20 and the upper support plate 3, so that the upper armor layer 20 can move back and forth more smoothly along the upper support plate 3; similarly, the lower chain link 4 and the lower armor unit 5 also have a similar matching structure, and the lower armor layer 50 can move back and forth smoothly along the lower support plate 6. In this embodiment, the upper armor layer 20 is supported by an upper annular chain 10, and the lower armor layer 50 is supported by a lower annular chain 40, which greatly improves the smoothness of the upper armor layer 20 and the lower armor layer 50 moving on the upper support plate 3 and the lower support plate 6, and also greatly improves the service life of the equipment.

[0036] The upper support surface 31 of the upper support plate 3 supports the upper rollers 12 on at least three upper rollers 11, thereby stably supporting the two adjacent upper armor units 2 connected to the three upper rollers 11. Generally speaking, one upper armor unit 2 is connected to two upper rollers 11 arranged at intervals, and supporting two upper armor units 2 should support four upper rollers 11. As for the understanding of supporting only three upper rollers 11, the following two simplest implementations are described. The first implementation is as follows. Fig.14 As shown, two adjacent upper armor units 2 are overlapped and connected together by sharing one upper roller 11, so that the two upper armor units 2 are only connected to three upper rollers 11. At this time, only the upper rollers 12 on the three upper rollers 11 can be supported to stably support the two adjacent upper armor units 2 connected thereto; another embodiment, as Fig.11 As shown, two adjacent upper armor units 2 are connected to two upper rollers 11, and then connected together by a pair of auxiliary upper chain link plates 131. At this time, the upper rollers 12 on the four upper rollers 11 connected to the two upper armor units are supported to achieve stability. The upper armor unit 2 and the lower armor unit 5 can remain stable under the support of the upper support surface 31 and the lower support surface 61 without jumping in the up and down directions. Such a structure can keep the upper channel wall 202 and the lower channel wall 502 stable, which is conducive to improving the quality of the pressing line and making the pressing line straight and uniform in depth.

[0037] The third embodiment, such as Figure 13~Figure 16 As shown, the upper base plate 21 and the upper side plate 22 define an upper roller cavity 25, and the upper armor unit 2 also includes an upper partition plate 26, which is arranged between the two upper side plates 22 to separate the upper roller cavity 25 into two upper auxiliary roller cavities 251 arranged in parallel, and the upper rollers 12 are respectively arranged in the two upper auxiliary roller cavities 251, and two raised upper guide rails 31 are arranged on the lower end surface of the upper support plate 3, and the upper rollers 12 in the two upper auxiliary roller cavities 251 can move along one of the upper guide rails 31 respectively. In this embodiment, it is equivalent to supporting the upper armor layer 20 by setting two upper annular chains 10, and the double support structure can further improve the stability of the movement of the upper armor unit 2, which is conducive to improving the wire pressing effect. Of course, in actual applications, more upper annular chains 10 can be set for support according to width requirements, and are not limited to the quantity limit in this embodiment.

[0038] The upper armor unit 2 is connected to the upper ring chain 10 by connecting the two upper rollers 11 through the two upper side plates 22, but the upper support plate 3 with a double support structure is used in conjunction with the two upper ring chains 10. As an improvement, Fig.15 As shown, the upper armor unit 2 can be regarded as being composed of two small armor units connected to both sides of the upper partition 26, and the two small armor units are arranged in a staggered manner, and the length of each small armor unit is half of the overall length of the upper armor unit 2 in the first embodiment and the second embodiment, and each small armor unit is only connected to one upper roller 11, while the upper partition 26 is simultaneously connected to two upper rollers 11. This arrangement can shorten the length of a single small armor unit, thereby doubling the number of connections of the upper armor unit 2, allowing the upper armor layer 20 to form a more tightly connected structure, especially when the upper armor layer 20 moves around the upper driving wheel 81, the opening angle of the two adjacent upper armor layers 20 can be reduced by half, which is conducive to improving the flexibility of the rotation of the upper armor layer 20 and reducing damage to the cardboard.

[0039] A further technical solution may be that the unit convex rib 7 may be arranged on the upper armor unit 2 or the lower armor unit 5 according to production needs. In one embodiment, the side of the cardboard printed with a pattern is the face paper, and the other side is the back paper. The indentation is generally pressed on one side of the back paper. In order to reduce the friction between the face paper and the conveyor belt, the cardboard is generally conveyed with the face paper facing up and the back paper facing down. In this case, the unit convex rib 7 is arranged on the lower armor unit 5, and a plurality of lower base plates 51 of the lower armor unit 5 supported by the lower support surface 61 are combined to form a lower channel wall 502. At this time, the plurality of unit convex ribs 7 form a convex rib group 70 arranged in a straight line or with a certain arc along the lower support surface 61. The width and height of the unit convex rib 7 are adjusted and set according to actual production requirements.

[0040] A further technical solution may also be: Figure 1 , Figure 3 and Figure 5As shown, the gap between the upper support plate 3 and the lower support plate 6 gradually becomes smaller and trumpet-shaped in the advancing direction, so that the paper passage 100 formed between the upper channel wall 202 and the lower channel wall 502 is also trumpet-shaped. Further, the upper support surface 31 of the upper support plate 3 and / or the lower support surface 61 of the lower support plate 6 are in an arc-shaped transition, and the gap between the upper support plate 3 and the lower support plate 6 is divided into a front gap and a rear gap at the closest point, wherein the front gap gradually becomes smaller and trumpet-shaped in the advancing direction of the paperboard, and the rear gap gradually becomes larger and trumpet-shaped in the advancing direction of the paperboard. Further, in the advancing direction of the paperboard, the length of the front gap is greater than the length of the rear gap. The advantage of setting a trumpet shape in the forward direction is that it is conducive to the entry of the cardboard, and on the other hand, it allows the cardboard's pressing depth to change from shallow to deep, and the relatively long pressing path can further reduce the risk of the cardboard being crushed; in addition, the gap in the rear exit direction is also set to a trumpet shape, in order to reduce the gap caused by the swing of the upper armor unit 2 or the lower armor unit 5 when it is separated from the upper support plate 3 or the lower support plate 6, causing unnecessary damage to the cardboard, so as to improve the integrity of the cardboard surface. Of course, further, a straight section can be added to the middle section of the arc-shaped support surface of the upper support plate 3 or the lower support plate 6 to enhance the pressing effect.

[0041] The upper pressing assembly further includes an upper tensioning wheel (not shown in the figure), which is arranged between the upper driving wheel 81 and the upper driven wheel 82 and is pressed tightly against the upper ring chain 10 or the upper armor layer 20. Of course, there is another tensioning structure, in which a strip hole is provided on the upper support frame, and the driven wheel 82 is connected to the strip hole. By adjusting the position of the driven wheel 82 in the front-rear direction, the upper ring chain 10 or the upper armor layer 20 can be tensioned.

[0042] like Figures 17 to 21The figure shows an improved structure of the upper driving wheel 81, the upper driven wheel 82 and the upper support plate 3. The upper driving wheel 81 and the upper driven wheel 82 are gears. The upper driving wheel 81 is provided with a plurality of upper driving wheel teeth 811. The upper driving wheel 81 rotates with the upper roller 12 through the upper driving wheel teeth 811. The movement trajectory of the upper roller 12 toward the vertex on one side of the central axis of the upper driving wheel 81 forms the first minimum rotation trajectory circle K1 of the upper roller 12. The upper driven wheel 82 is provided with a plurality of upper driven wheel teeth 821. The upper driven wheel 82 rotates with the upper roller 12 through the upper driven wheel teeth 821. 2 rotates, the movement trajectory of the upper roller 12 toward the vertex on one side of the central axis of the upper driven wheel 82 forms the second minimum rotation trajectory circle K2 of the upper roller 12; the two end portions of the upper support plate 3 extend to the sides of the upper driving wheel teeth 811 and the upper driven wheel teeth 821 respectively, and along the axial direction of the upper driving wheel 81 and the upper driven wheel 82, the upper support surfaces 31 at the two end portions of the upper support plate 3 are arranged tangent to the first minimum rotation trajectory circle K1 and the second minimum rotation trajectory circle K2 of the upper roller 12 respectively; the lower driving wheel 81 and the upper driven wheel 82 are arranged tangent to each other. The wheel 84 and the lower driven wheel 85 are gears. The lower driving wheel 84 is provided with a plurality of lower driving wheel teeth 841. The lower driving wheel 84 rotates with the lower roller 42 through the lower driving wheel teeth 841. The movement trajectory of the lower roller 42 toward the vertex on one side of the central axis of the lower driving wheel 84 forms a third minimum rotation trajectory circle K3 (not shown in the figure) of the lower roller 42. The lower driven wheel 85 is provided with a plurality of lower driven wheel teeth 851. The lower driven wheel 85 rotates with the lower roller 42 through the lower driven wheel teeth 851. The movement trajectory of the lower roller 42 toward the vertex on one side of the central axis of the lower driven wheel 85 forms the fourth minimum rotation trajectory circle K4 (not shown in the figure) of the lower roller 42; the end portions of the lower support plate 6 extend to the sides of the lower driving wheel teeth 841 and the lower driven wheel teeth 851 respectively, and when viewed along the axial direction of the lower driving wheel 84 and the lower driven wheel 85, the lower support surfaces 61 at the end portions of the lower support plate 6 are respectively arranged tangent to the third minimum rotation trajectory circle K3 and the fourth minimum rotation trajectory circle K4 of the lower roller 42.

[0043] like Fig.18As shown, the upper support surface 31 of the upper support plate 3 is arranged tangent to the first minimum rotation track circle K1 and the second minimum rotation track circle K2 of the upper roller 12, so that the upper support surface 31 of the upper support plate 3 can stably support the movement of the upper roller 12 and allow the upper roller 12 to slide smoothly between the gear teeth of the upper driving wheel 81 or the upper driven wheel 82, and the entire movement track of the upper roller 12 is stably supported and smooth. The advantage of this is that the jumping of the upper roller 12 during the movement between the support plate and the gear is greatly reduced, thereby reducing the noise generated by the impact when the upper ring chain 10 rotates, and more importantly, this can improve the movement stability of the upper armor unit 2. Similarly, the lower roller 42 can also achieve smooth rolling, and the noise generated by the impact when the lower ring chain 40 rotates is effectively controlled, which improves the movement stability of the lower armor unit 5 and the unit convex rib 7, and better ensures that the cardboard forms a continuous and uniform indentation.

[0044] Furthermore, the first minimum rotation trajectory circle K1 is a concentric circle with the pitch circle K5 of the upper driving wheel 81, and the center line of the upper roller 12 rotated by the upper driving wheel teeth 811 falls on the pitch circle of the upper driving wheel 81; the second minimum rotation trajectory circle K2 is a concentric circle with the pitch circle K6 of the upper driven wheel 82, and the center line of the upper roller 12 rotated by the upper driven wheel teeth 821 falls on the pitch circle of the upper driven wheel 82; the third minimum rotation trajectory circle K3 is a concentric circle with the pitch circle of the lower driving wheel 84, and the center line of the lower roller 42 rotated by the lower driving wheel teeth 841 falls on the pitch circle of the lower driven wheel 85; the fourth minimum rotation trajectory circle K4 is a concentric circle with the pitch circle of the lower driven wheel 85, and the center line of the lower roller 42 rotated by the lower driven wheel teeth 851 falls on the pitch circle of the lower driven wheel 85.

[0045] Furthermore, the upper pressing assembly also includes an upper auxiliary support plate 3', the upper auxiliary support plate 3' is arranged above the upper support plate 3, and has an upper auxiliary support surface 31' facing upward, the upper auxiliary support surface 31' is used to provide support for the upper roller 12 of the upper ring chain 10, and the ends of the upper auxiliary support plate 3' extend to the sides of the upper driving gear teeth 811 and the upper driven gear teeth 821 respectively, and the upper auxiliary support surfaces 31' at the ends of the upper auxiliary support plate 3' are respectively aligned with the first minimum rotation trajectory circle K1 and the second minimum rotation trajectory circle K2 of the upper roller 12. The lower pressing assembly also includes a lower auxiliary support plate 6', which is arranged below the lower support plate 6 and has a lower auxiliary support surface 61' facing downward, and the lower auxiliary support surface 61' is used to provide support for the lower roller 42 of the lower ring chain. The ends of the lower auxiliary support plate 6' extend to the sides of the lower driving gear 841 and the lower driven gear 851 respectively, and the lower auxiliary support surfaces 61' at the ends of the lower auxiliary support plate 6' are arranged tangent to the third minimum rotation trajectory circle K3 and the fourth minimum rotation trajectory circle K4 of the lower roller 42. By providing upper and lower supports for the upper ring chain 10, the noise generated by the impact when the upper ring chain 10 rotates can be further reduced.

[0046] Furthermore, the upper auxiliary support plate 3' includes an upper fixed block 32', an upper movable block 33' and an upper elastic connecting member 34', the upper fixed block 32' is provided with an upper pit 35' on the upper side, the upper movable block 33' is movably arranged in the upper pit 35', the upper elastic connecting member 34' is arranged between the upper fixed block 32' and the upper movable block 33', the upper movable block 33' can move up and down under the action of the upper elastic connecting member 34', the upper surface of the upper movable block 33' protrudes higher than the upper surface of the upper fixed block 32' or smoothly transitions to the upper surface of the upper fixed block 32' to form the upper auxiliary support surface 31'. Similarly, the lower auxiliary support plate 6' includes a lower fixed block (not shown in the figure), a lower movable block (not shown in the figure) and a lower elastic connecting member (not shown in the figure), the lower fixed block is provided with a lower pit (not shown in the figure) on the downward side, the lower movable block is movably arranged in the lower pit, the lower elastic connecting member is arranged between the lower fixed block and the lower movable block, the lower movable block can move up and down under the action of the lower elastic connecting member, the lower surface of the lower movable block protrudes higher than the lower surface of the lower fixed block or smoothly transitions to the lower surface of the lower fixed block to form the lower supporting surface. Furthermore, the upper surface of the upper movable block 33' is set to be an arc with a high middle and low sides, so that when the upper ring chain 10 rotates, the upper roller 12 only contacts the upper surface of the middle protrusion of the upper movable block 33', and does not contact the connection between the two ends of the upper movable block 33'; similarly, the lower surface of the lower movable block is set to be an arc with a high middle and low sides, and the lower roller 42 on the lower ring chain 40 also only contacts the upper surface of the middle protrusion of the lower fixed block. By setting the upper movable block 33' and the lower movable block, the upper ring chain 10 and the lower ring chain 40 can be lifted up on the side where the line is not pressed, which plays the role of tensioning the chain, which is beneficial to improve the stability of the chain when rotating and reduce the jumping of the roller.

[0047] Furthermore, an upper left insertion portion 32 and an upper right insertion portion 33 are respectively provided at both end portions of the upper support plate 3, and the upper left insertion portion 32 is radially inserted into the side or middle groove of the upper driving gear tooth 811 to form a stacked arrangement, and the upper right insertion portion 33 is radially inserted into the side or middle groove of the upper driven gear tooth 821 to form a stacked arrangement, wherein the width of the upper left insertion portion 32 and the upper right insertion portion 33 is smaller than the width of the middle portion of the upper support plate 3, and the sum of the widths of the upper left insertion portion 32 and the upper driving gear tooth 811 or the sum of the widths of the upper right insertion portion 33 and the upper driven gear tooth 821 is smaller than the length of the upper roller 12. The lower left insertion part 62 and the lower right insertion part 63 are respectively provided at the two end portions of the lower support plate 6. The lower left insertion part 62 is inserted into the side or middle groove of the lower driving gear teeth 841 in the radial direction to form a stacked arrangement, and the lower right insertion part 63 is inserted into the side or middle groove of the lower driven gear teeth 851 in the radial direction to form a stacked arrangement, wherein the width of the lower left insertion part 62 and the lower right insertion part 63 is smaller than the width of the middle part of the lower support plate 6, and the sum of the width of the lower left insertion part 62 and the lower driving gear teeth 841 or the sum of the width of the lower right insertion part 63 and the lower driven gear teeth 851 is smaller than the length of the upper roller 42. In order to control the length of the upper roller 12 and the lower roller 42, the thickness of the upper driving gear teeth 811, the upper driven gear teeth 821, the lower driving gear teeth 841, and the lower driven gear teeth 851 can be changed, for example, by reducing part of the material on one side of the gear teeth, or reducing part of the material in the middle of the gear teeth to form a middle groove structure.

Claims

1. A cardboard pressing device, comprising an upper pressing component and a lower pressing component; characterized in that: The upper pressing assembly includes a plurality of rigid upper armor units arranged adjacent to each other in front and back, and the adjacent upper armor units rotate relative to each other, each of the upper armor units includes an upper base plate, and the plurality of upper base plates are connected end to end to form an upper armor layer that can rotate in a ring, and the upper armor layer includes an upper chord segment arranged along the moving direction of the paperboard; and also includes a rigid upper support plate, the upper support plate has an upper support surface facing downward, the upper support surface is arranged above the upper chord segment and provides continuous support for at least two adjacent upper armor units in the upper chord segment, and the upper base plates of the supported upper armor units are combined to form an upper channel wall; The lower pressing assembly includes a plurality of rigid lower armor units arranged adjacent to each other in front and back, the adjacent lower armor units rotate relative to each other, each lower armor unit includes a lower base plate, and the plurality of lower base plates are connected end to end to form a lower armor layer that can rotate in an annular manner, and the lower armor layer includes a lower chord segment arranged along the moving direction of the paperboard; and further includes a rigid lower support plate, the lower support plate having a lower support surface facing upward, the lower support surface is arranged below the lower chord segment and provides continuous support for at least two adjacent lower armor units in the lower chord segment, and the lower base plates of the supported plurality of lower armor units are combined to form a lower channel wall; The upper support surface of the upper support plate and the lower support surface of the lower support plate are arranged opposite to each other up and down; A unit convex rib is provided in the central area of ​​the upper base plate or the lower base plate, which is protruding outward and arranged along the moving direction of the paperboard. The front and rear adjacent unit convex ribs are connected front and back to form a convex rib group. The upper channel wall and the lower channel wall are arranged opposite to each other in the up and down direction and form a paper passing channel therebetween. The unit convex rib is used to form a continuous indentation on the paperboard in the paper passing channel.

2. The cardboard creasing device according to claim 1, characterized in that: The upper pressing assembly also includes an upper ring chain composed of multiple upper chain links connected end to end, the upper chain link includes an upper roller and an upper roller installed on the upper roller and rotatable, the upper roller is a roller or a bearing, one section of the upper armor unit is connected to the upper ring chain by connecting two upper rollers arranged at intervals, the upper base plate of the upper armor unit is laid on the outer side of the upper roller and the upper roller, the upper roller can roll on the upper support surface of the upper support plate, and the upper support surface of the upper support plate can support the upper rollers on at least three of the upper rollers in the upper ring chain, so as to stably support the two adjacent sections of the upper armor units connected to the three upper rollers; The lower pressing assembly also includes a lower ring chain composed of multiple lower chain links connected end to end, the lower chain link includes a lower roller and a lower roller installed on the lower roller and rotatable, the lower roller is a roller or a bearing, a section of the lower armor unit is connected to the lower ring chain by connecting two lower rollers arranged at intervals, the lower base plate of the lower armor unit is laid on the outer side of the lower roller and the lower roller, the lower roller can roll on the lower supporting surface of the lower support plate, the lower supporting surface of the lower support plate can support the lower rollers on at least three of the lower rollers in the lower ring chain, thereby stably supporting the two adjacent lower armor units corresponding to the three lower rollers.

3. The cardboard creasing device according to claim 1 or 2, characterized in that: The gap between the upper support plate and the lower support plate gradually becomes smaller in the advancing direction of the paperboard and becomes trumpet-shaped, so that the paper passing channel formed between the upper channel wall and the lower channel wall also becomes trumpet-shaped.

4. The cardboard creasing device according to claim 3, characterized in that: The upper supporting surface of the upper supporting plate and / or the lower supporting surface of the lower supporting plate are arc-shaped, and the gap between the upper supporting plate and the lower supporting plate is divided into a front gap and a rear gap at the closest point, wherein the front gap gradually becomes smaller and becomes a trumpet shape in the advancing direction of the cardboard, and the rear gap gradually becomes larger and becomes a trumpet shape in the advancing direction of the cardboard.

5. The cardboard creasing device according to claim 4, characterized in that: In the advancing direction of the paperboard, the length of the front gap is greater than the length of the rear gap.

6. The cardboard creasing device according to claim 1 or 2, characterized in that: One end of the upper base plate and the lower base plate is provided with an outwardly protruding overlapping edge, and the other end is provided with an inwardly recessed step. When two adjacent upper armor units or lower armor units are connected, the overlapping edge can overlap the steps of the adjacent upper armor units or lower armor units so that the two adjacent upper base plates or lower base plates are fitted and connected together, and the outer surfaces of the two adjacent upper base plates or lower base plates connected are flush.

7. The cardboard creasing device according to claim 2, characterized in that: The upper armor unit also includes upper side plates connected to the left and right sides of the upper base plate, the upper base plate and the upper side plates define an upper roller cavity, the upper armor unit is connected to the upper roller through the upper side plates, and at least part of the upper roller is arranged in the upper roller cavity; the lower armor unit also includes lower side plates connected to the left and right sides of the lower base plate, the lower base plate and the lower side plates define a lower roller cavity, the lower armor unit is connected to the lower roller through the lower side plates, and at least part of the lower roller is arranged in the lower roller cavity.

8. The cardboard creasing device according to claim 7, characterized in that: The upper armor unit also includes an upper partition, which is arranged between the two upper side plates to divide the upper roller cavity into two upper auxiliary roller cavities arranged in parallel, the upper rollers are respectively arranged in the two upper auxiliary roller cavities, and two upper guide rails protruding downward are arranged on the upper support plate, the lower surface of the upper guide rail is the upper support surface, and the upper rollers in the two upper auxiliary roller cavities can move along one of the upper guide rails respectively; the lower armor unit also includes a lower partition, which is arranged between the two lower side plates to divide the lower roller cavity into two lower auxiliary roller cavities arranged in parallel, the lower rollers are respectively arranged in the two lower auxiliary roller cavities, and two lower guide rails protruding upward are arranged on the lower support plate, the upper surface of the lower guide rail is the lower support surface, and the lower rollers in the two lower auxiliary roller cavities can move along one of the lower guide rails respectively.

9. The cardboard creasing device according to claim 2, characterized in that: The upper pressing assembly also includes an upper driving wheel, an upper driven wheel and an upper driving motor, the upper annular chain is connected to the upper driving wheel and the upper driven wheel, and the upper driving motor can drive the upper driving wheel to rotate, thereby rotating the upper annular chain and the upper armor layer; the lower pressing assembly also includes a lower driving wheel, a lower driven wheel and a lower driving motor, the lower annular chain is connected to the lower driving wheel and the lower driven wheel, and the lower driving motor can drive the lower driving wheel to rotate, thereby rotating the lower annular chain and the lower armor layer.

10. The cardboard creasing device according to claim 9, characterized in that: The upper pressing assembly also includes an upper tensioning wheel, which is arranged between the upper driving wheel and the upper driven wheel and is pressed tightly against the upper annular chain or the upper armor layer; the lower pressing assembly also includes a lower tensioning wheel, which is arranged between the lower driving wheel and the lower driven wheel and is pressed tightly against the lower annular chain or the lower armor layer.

11. The cardboard creasing device according to claim 9, characterized in that: The upper driving wheel and the upper driven wheel are gears, the upper driving wheel is provided with a plurality of upper driving wheel teeth, the upper driving wheel drives the upper roller to rotate through the upper driving wheel teeth, and the movement trajectory of the upper roller toward the vertex on one side of the central axis of the upper driving wheel forms a first minimum rotation trajectory circle of the upper roller; the upper driven wheel is provided with a plurality of upper driven wheel teeth, the upper driven wheel drives the upper roller to rotate through the upper driven wheel teeth, and the movement trajectory of the upper roller toward the vertex on one side of the central axis of the upper driven wheel forms a second minimum rotation trajectory circle of the upper roller; the two end portions of the upper support plate extend to the side edges of the upper driving wheel teeth and the upper driven wheel teeth respectively, and the upper support surfaces of the two end portions of the upper support plate are respectively arranged tangent to the first minimum rotation trajectory circle and the second minimum rotation trajectory circle of the upper roller; The lower driving wheel and the lower driven wheel are gears, and the lower driving wheel is provided with a plurality of lower driving wheel teeth, and the lower driving wheel drives the lower roller to rotate through the lower driving wheel teeth, and the movement trajectory of the lower roller toward the vertex on one side of the central axis of the lower driving wheel forms the third minimum rotation trajectory circle of the lower roller; the lower driven wheel is provided with a plurality of lower driven wheel teeth, and the lower driven wheel drives the lower roller to rotate through the lower driven wheel teeth, and the movement trajectory of the lower roller toward the vertex on one side of the central axis of the lower driven wheel forms the fourth minimum rotation trajectory circle of the lower roller; the two end portions of the lower support plate extend to the sides of the lower driving wheel teeth and the lower driven wheel teeth respectively, and the lower support surfaces at the two end portions of the lower support plate are arranged tangent to the third minimum rotation trajectory circle and the fourth minimum rotation trajectory circle of the lower roller respectively.

12. The cardboard creasing device according to claim 11, characterized in that: The first minimum rotation trajectory circle is concentric with the pitch circle of the upper driving wheel, and the center line of the upper roller rotated by the upper driving wheel teeth falls on the pitch circle of the upper driving wheel; the second minimum rotation trajectory circle is concentric with the pitch circle of the upper driven wheel, and the center line of the upper roller rotated by the upper driven wheel teeth falls on the pitch circle of the upper driven wheel; the third minimum rotation trajectory circle is concentric with the pitch circle of the lower driving wheel, and the center line of the lower roller rotated by the lower driving wheel teeth falls on the pitch circle of the lower driven wheel; the fourth minimum rotation trajectory circle is concentric with the pitch circle of the lower driven wheel, and the center line of the lower roller rotated by the lower driven wheel teeth falls on the pitch circle of the lower driven wheel.

13. The cardboard creasing device according to claim 11, characterized in that: The wheelbase is shortened and the strapping assembly is retracted to allow the rider to move forward along the length of the wheelbase, the rider being able to move forward along the wheelbase before the gear train is raised.

14. The cardboard creasing device according to claim 13, characterized in that: The upper auxiliary support plate includes an upper fixed block, an upper movable block and an upper elastic connecting piece, the upper fixed block is provided with an upper pit on the upper side, the upper movable block is movably provided in the upper pit, the upper elastic connecting piece is provided between the upper fixed block and the upper movable block, the upper movable block can move up and down under the action of the upper elastic connecting piece, the upper surface protrusion of the upper movable block is higher than the upper surface of the upper fixed block or smoothly transitions with the upper surface of the upper fixed block to form the upper auxiliary supporting surface.

15. The cardboard creasing device according to claim 13, characterized in that: The lower auxiliary support plate includes a lower fixed block, a lower movable block and a lower elastic connecting piece, the lower fixed block is provided with a lower pit on the downward side, the lower movable block is movably provided in the lower pit, the lower elastic connecting piece is provided between the lower fixed block and the lower movable block, and the lower movable block can move up and down under the action of the lower elastic connecting piece, so that the lower surface of the lower movable block protrudes higher than the lower surface of the lower fixed block or smoothly transitions with the lower surface of the lower fixed block to form the lower auxiliary supporting surface.

16. The cardboard creasing device according to any one of claims 11 to 15, characterized in that: The two end portions of the upper support plate are respectively provided with an upper left insertion portion and an upper right insertion portion, the upper left insertion portion radially extends into the side edge or middle groove of the upper driving gear teeth and forms a stacked arrangement, and the upper left insertion portion radially extends into the side edge or middle groove of the upper driven gear teeth and forms a stacked arrangement, wherein the width of the upper left insertion portion and the upper right insertion portion is smaller than the width of the middle portion of the upper support plate, and the sum of the width of the upper left insertion portion and the upper driving gear teeth or the sum of the width of the upper right insertion portion and the upper driven gear teeth is smaller than the length of the upper roller; The two end portions of the lower support plate are respectively provided with a lower left insertion portion and a lower right insertion portion, the lower left insertion portion radially extends into the side edge or the middle groove of the lower driving gear teeth and forms a stacked arrangement, the lower left insertion portion radially extends into the side edge or the middle groove of the lower driven gear teeth and forms a stacked arrangement, wherein the widths of the lower left insertion portion and the lower right insertion portion are smaller than the width of the middle portion of the lower support plate, and the sum of the widths of the lower left insertion portion and the lower driving gear teeth or the sum of the widths of the lower right insertion portion and the lower driven gear teeth is smaller than the length of the upper roller.

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