Cardboard conveying device and inkjet printer

Abstract

The present application discloses a cardboard conveying device and an inkjet printer. The cardboard conveying device is used to convey cardboard along a first direction, and includes: a first conveyor belt assembly, a second conveyor belt assembly and a positioning plate. The first conveyor belt assembly is arranged along the first direction; the second conveyor belt assembly is arranged along the second direction; the positioning plate is arranged on the side of the second conveyor belt assembly away from the first conveyor belt assembly, and the positioning plate is arranged along the first direction, wherein the second direction intersects with the first direction and is inclined toward the positioning plate. The second conveyor belt assembly provides a directional force toward the first direction to the cardboard, and provides a directional force toward the positioning plate, so that the second conveyor belt assembly can cooperate with the first conveyor belt assembly to convey toward the first direction, and can also make the cardboard move toward the positioning plate until the cardboard abuts against the positioning plate. The cardboard conveying device of the present application can adjust and regularize the position of the cardboard during the cardboard conveying process, so that the conveying of the cardboard is not affected by the positioning process.

Description

Technical Field

[0001] The present application relates to the field of cardboard production equipment, and in particular to a cardboard conveying device and an inkjet printer. Background Art

[0002] During the production process, the cardboard needs to be transported to one side of each processing equipment through a conveying device to process the cardboard. For example, the cardboard is transported to one side of a coding device, a gluing device or a nailing device to perform coding, gluing or nailing on the cardboard. During the process of the conveying device conveying the cardboard, the cardboard may be offset to a certain extent, resulting in inaccurate processing position of the processing equipment relative to the cardboard. In order to improve the processing accuracy, in the related art, the conveying line of the cardboard conveying device is provided with a positioning component at a position close to the processing equipment. The positioning component generally includes two positioning plates arranged on both sides of the conveying line, and the positioning plates are driven by a cylinder to approach or move away from the conveying line. When the cardboard is conveyed to one side of the positioning component, the cylinder drives the positioning plates to press against both sides of the cardboard, thereby regularizing the position of the cardboard. However, in the above positioning process, the cardboard needs to stop on one side of the positioning plate, and the positioning plate will then regularize the position of the cardboard, which will affect the conveying efficiency of the cardboard. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a cardboard conveying device, which can position the cardboard without stopping the cardboard.

[0004] The present application also proposes an inkjet printer having the above-mentioned cardboard conveying device.

[0005] According to the first aspect of the present application, a cardboard conveying device is used to convey cardboard along a first direction, and includes: a first conveyor belt assembly, a second conveyor belt assembly and a positioning plate.

[0006] The first conveyor belt assembly is arranged along a first direction;

[0007] The second conveyor belt assembly is arranged along the second direction;

[0008] The positioning plate is arranged on a side of the second conveyor belt assembly away from the first conveyor belt assembly, and the positioning plate is arranged along the first direction, wherein the second direction intersects with the first direction and is inclined toward the positioning plate.

[0009] The cardboard conveying device according to the first embodiment of the present application has at least the following beneficial effects: the second conveyor belt assembly provides a directional force toward the first direction and a directional force toward the positioning plate to the cardboard, so that the second conveyor belt assembly can cooperate with the first conveyor belt assembly to convey the cardboard toward the first direction, and can also make the cardboard move toward the positioning plate until the cardboard abuts against the positioning plate. The cardboard conveying device of the present application can adjust and regularize the position of the cardboard during the cardboard conveying process, so that the cardboard can be conveyed while positioning the cardboard, so that the conveying of the cardboard is not affected by the positioning process, thereby ensuring the position accuracy of the cardboard while ensuring the conveying efficiency of the cardboard conveying device of the present application.

[0010] According to some embodiments of the present application, the second conveyor belt assembly includes a motor, a belt, a driving roller and a driven roller, the motor drives the driving roller, and the belt is wound around the driving roller and the driven roller; wherein the axis line of the driving roller and the axis line of the driven roller are arranged along a third direction, and the third direction is perpendicular to the second direction.

[0011] According to some embodiments of the present application, the second conveyor belt assembly also includes a first mounting plate and two second mounting plates, the first mounting plate having a first mounting surface and a second mounting surface, the first mounting surface is parallel to the first direction, the second mounting surface is parallel to the second direction, the second mounting plate is arranged along the first direction and has a third mounting surface, the third mounting surface is parallel to the first direction; the active roller and the driven roller are both rotatably arranged on the first mounting plate; wherein the first mounting surface is connected to the third mounting surface, and the motor is installed on the second mounting surface.

[0012] According to some embodiments of the present application, the two ends of the driven roller can swing relative to the second mounting plate; the second conveyor belt assembly also includes two adjustment structures, at least one adjustment structure is provided on each second mounting plate, and corresponding to the two ends of the driven roller, the adjustment structure includes a fixed block and an adjusting member, the fixed block is fixed to the second mounting plate, one end of the adjusting member is connected to the fixed block, and the other end can move away from or approach the fixed block, and can be connected to one end of the driven roller.

[0013] According to some embodiments of the present application, one end of the adjusting member is threadedly connected to the fixing block, and the other end is abutted against one end of the driven roller.

[0014] According to some embodiments of the present application, a slide groove is provided on the first mounting plate, and the slide groove extends along the first direction. The belt is wound around one side of the driven roller to give the driven roller a force tending to a fourth direction. The adjusting member is connected to the other side of the driven roller to give the driven roller a force tending to a fifth direction, and the fourth direction and the fifth direction are opposite.

[0015] According to some embodiments of the present application, one end of the slide groove away from the fixing block passes through the second mounting plate.

[0016] According to some embodiments of the present application, it also includes a frame and a sliding rod, the sliding rod is fixedly connected to the frame along a sixth direction, the sixth direction is perpendicular to the first direction, and the first conveyor belt assembly and the second conveyor belt assembly are slidably arranged on the sliding rod along the sixth direction.

[0017] According to some embodiments of the present application, the width of the conveying surface of the second conveyor belt assembly is greater than the width of the conveying surface of the first conveyor belt assembly.

[0018] The inkjet printer according to the second embodiment of the present application includes the cardboard conveying device of the first embodiment.

[0019] The inkjet printer according to the second embodiment of the present application has at least the following beneficial effects: all the beneficial effects of the cardboard conveying device including the first embodiment are no longer repeated here.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 A three-dimensional diagram of a cardboard conveying device according to an embodiment of the present application;

[0023] Figure 2 for Figure 1 A top view of the middle paperboard conveying device;

[0024] Figure 3 for Figure 1 A schematic diagram of a portion of the structure of the paperboard conveying device;

[0025] Figure 4 for Figure 1 A schematic diagram of a portion of the structure of the paperboard conveying device;

[0026] Figure 5 for Figure 1 Schematic diagram of the partial structure of the cardboard conveying device.

[0027] Reference numerals:

[0028] A first conveyor belt assembly 100;

[0029] The second conveyor belt assembly 200, the motor 210, the belt 220, the active roller 230, the driven roller 240, the first mounting plate 250, the first mounting surface 251, the second mounting surface 252; the second mounting plate 260, the third mounting surface 261, the slide 262; the adjustment structure 270, the fixing block 271, the adjustment member 272;

[0030] Positioning plate 300;

[0031] Rack 400;

[0032] Slide bar 500. DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0034] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0037] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0038] Reference Figure 1 and Figure 2 According to the first aspect of the present application, the cardboard conveying device is used to convey cardboard along a first direction, including: a first conveyor belt assembly 100, a second conveyor belt assembly 200 and a positioning plate 300.

[0039] The first conveyor belt assembly 100 is disposed along a first direction, that is, the length direction of the first conveyor belt assembly 100 extends along the first direction, and the first conveyor belt assembly 100 is conveyed along the first direction.

[0040] The second conveyor belt assembly 200 is disposed along the second direction, that is, the length direction of the second conveyor belt assembly 200 extends along the second direction, and the second conveyor belt assembly 200 conveys along the second direction.

[0041] The positioning plate 300 is disposed on a side of the second conveyor belt assembly 200 away from the first conveyor belt assembly 100 , and the positioning plate 300 is disposed along a first direction, wherein the second direction intersects with the first direction and is inclined toward the positioning plate 300 .

[0042] It can be understood that the first conveyor belt assembly 100 is arranged along the first direction and conveys the cardboard along the first direction, and the second conveyor belt assembly 200 is arranged along the second direction and conveys the cardboard along the second direction. Since the first direction and the second direction intersect, and the positioning plate 300 is arranged on the side of the second conveyor belt assembly 200 away from the first conveyor belt assembly 100, the second conveyor belt assembly 200 provides a directional force toward the first direction to the cardboard, and provides a directional force toward the positioning plate 300, so that the second conveyor belt assembly 200 can cooperate with the first conveyor belt assembly 100 to convey toward the first direction, and can also make the cardboard move toward the positioning plate 300 until the cardboard abuts against the positioning plate 300. When the cardboard abuts against the positioning plate 300, the directional force of the second conveyor belt assembly 200 on the cardboard toward the positioning plate 300 will be offset by the reaction force of the positioning plate 300, so that the cardboard can continue to move toward the first direction along the extension direction of the positioning plate 300, so that the cardboard can be regularized and positioned based on the positioning plate 300. In summary, the cardboard conveying device of the present application can adjust and regularize the position of the cardboard during the cardboard conveying process, so that the cardboard can be conveyed while the cardboard is positioned, so that the conveying of the cardboard is not affected by the positioning process, thereby ensuring the position accuracy of the cardboard while ensuring the conveying efficiency of the cardboard conveying device of the present application.

[0043] Specifically, in this embodiment, the positioning plate 300 is fixedly disposed on the second conveyor belt assembly 200 to better position the cardboard. In other embodiments, the positioning plate 300 may also be spaced apart from the second conveyor belt assembly 200 .

[0044] Reference Figures 1 to 3 According to some embodiments of the present application, the second conveyor belt assembly 200 includes a motor 210, a belt 220, an active roller 230 and a driven roller 240, the motor 210 drives and connects the active roller 230, and the belt 220 is wound around the active roller 230 and the driven roller 240; wherein the axis line of the active roller 230 and the axis line of the driven roller 240 are arranged along a third direction, and the third direction is perpendicular to the second direction.

[0045] It is understandable that the motor 210 can drive the active roller 230 to rotate. Since the belt 220 is wound around the active roller 230 and the driven roller 240, the belt 220 can rotate around the active roller 230 and the driven roller 240 and drive the driven roller 240 to rotate. During the rotation of the belt 220, the cardboard on the belt 220 can be transported. Since the axis of the active roller 230 and the axis of the driven roller 240 are both arranged along the third direction, and the third direction is perpendicular to the second direction, the active roller 230 and the driven roller 240 can drive the belt 220 to rotate along the second direction, so that the belt 220 can transport the cardboard in the third direction.

[0046] It should be understood that, in this embodiment, the structure of the first conveyor belt assembly 100 may also be similar to that of the second conveyor belt assembly 200 , and is also a belt 220 conveyor belt assembly.

[0047] Reference Figure 1 and Figure 2 According to some embodiments of the present application, the second conveyor belt assembly 200 also includes a first mounting plate 250 and two second mounting plates 260, the first mounting plate 250 has a first mounting surface 251 and a second mounting surface 252, the first mounting surface 251 is parallel to the first direction, the second mounting surface 252 is parallel to the second direction, the second mounting plate 260 is arranged along the first direction and has a third mounting surface 261, and the third mounting surface 261 is parallel to the first direction; the active roller 230 and the driven roller 240 are both rotatably arranged on the first mounting plate 250; wherein the first mounting surface 251 is connected to the third mounting surface 261, and the motor 210 is installed on the second mounting surface 252.

[0048] It can be understood that the first mounting surface 251 of the first mounting plate 250 is connected to the third mounting surface 261 of the second mounting plate 260, and since the first mounting surface 251 and the third mounting surface 261 are both parallel to the first direction, the first mounting surface 251 overlaps with the third mounting surface 261. In addition, the motor 210 is mounted on the second mounting surface 252, and the second mounting surface 252 is parallel to the second direction, so that the motor 210 faces a direction perpendicular to the second direction, that is, the third direction, so that the axis of the motor 210 is parallel to the third direction and the axis of the active roller 230, so as to ensure the stability of the connection between the motor 210 and the active roller 230, so that the motor 210 can stably drive the active roller 230. For example, the driving end of the motor 210 is connected to the rotating shaft of the active roller 230 through a transmission belt. Since the axis line of the motor 210 (i.e., the axis line of the driving end of the motor 210) and the axis line of the active roller 230 (i.e., the axis line of the rotating shaft of the active roller 230) are parallel, the end of the transmission belt 220 connected to the motor 210 and the end connected to the active roller 230 will not be twisted, thereby ensuring the driving stability of the motor 210.

[0049] Specifically, the fixing plate is integrally formed with the second mounting plate 260 away from the first conveyor belt assembly 100, that is, the upper end of the second mounting plate 260 extends in the height direction to be higher than the conveying surface of the belt 220 and forms a fixing plate.

[0050] Reference Figure 4 and Figure 5According to some embodiments of the present application, both ends of the driven roller 240 can swing relative to the second mounting plate 260; the second conveyor belt assembly 200 also includes two adjustment structures 270, each second mounting plate 260 is provided with at least one adjustment structure 270, and corresponding to the two ends of the driven roller 240, the adjustment structure 270 includes a fixed block 271 and an adjustment member 272, the fixed block 271 is fixed to the second mounting plate 260, one end of the adjustment member 272 is connected to the fixed block 271, and the other end can be moved away from or close to the fixed block 271, and can be connected to one end of the driven roller 240.

[0051] It is understandable that at least one adjustment structure 270 is provided on each second mounting plate 260, and each end of the driven roller 240 corresponds to at least one adjustment structure 270, and thus, the two ends of the driven roller 240 are swung relative to the second mounting plate 260 through the adjustment structure 270, so that the driven roller 240 is tilted relative to the second mounting plate 260 and faces the third direction. Specifically, since the fixing block 271 is fixed on the second mounting plate 260, and one end of the adjustment member 272 is connected to the fixing block 271, the other end can move away from or approach the fixing block 271 and can be connected to one end of the driven roller 240, thus, when the other end of the adjustment member 272 moves closer to or away from the fixing block 271, the other end of the adjustment member 272 can drive the end of the driven roller 240 to swing relative to the second mounting plate 260, so that the driven roller 240 is tilted relative to the second mounting plate 260. It should be understood that the inclination angle of the driven roller 240 is adjusted by the fixing block 271 and the adjusting member 272 , and the adjustment method is simple.

[0052] Reference Figure 4 and Figure 5 According to some embodiments of the present application, one end of the adjusting member 272 is threadedly connected to the fixing block 271 , and the other end is abutted against one end of the driven roller 240 .

[0053] It can be understood that, in this embodiment, one end of the adjusting member 272 is connected to the fixing block 271 by threaded connection, and the other end is connected to the driven roller 240 by abutment. For example, when the adjusting member 272 is screwed relative to the fixing block 271, one end of the adjusting member 272 moves in the direction of disengaging from the threaded hole on the fixing block 271, and the other end of the adjusting member 272 pushes one end of the driven roller 240 to make the driven roller 240 swing relative to the second mounting plate 260; conversely, when the adjusting member 272 is screwed relative to the fixing block 271, the one end of the adjusting member 272 moves in the direction of disengaging from the threaded hole on the fixing block 271, and the other end of the adjusting member 272 pushes one end of the driven roller 240 to make the driven roller 240 swing relative to the second mounting plate 260. The fixing block 271 is screwed, and one end of the adjusting member 272 moves toward the direction of entering the threaded hole, and the other end of the adjusting member 272 reduces the supporting force on the driven roller 240. Then, the tensioning force of the belt 220 is used to pull the driven roller 240 and the other end of the adjusting member 272 to abut against each other. Alternatively, an elastic member is provided between the driven roller 240 and the second mounting plate 260. The elastic member has an elastic force that drives the driven roller 240 toward the adjusting member 272, and the driven roller 240 is pulled to abut against the adjusting member 272 through the elastic member.

[0054] Of course, in other embodiments, the adjusting member 272 is designed as a telescopic rod or a pneumatic spring, and both ends are fixedly connected to the fixing block 271 and the driven roller 240 respectively.

[0055] Reference Figure 4 and Figure 5 According to some embodiments of the present application, a slide groove 262 is provided on the second mounting plate 260, and the slide groove 262 extends along the first direction. The belt 220 is wound around one side of the driven roller 240 to give the driven roller 240 a force tending to the fourth direction. The adjusting member 272 is connected to the other side of the driven roller 240 to give the driven roller 240 a force tending to the fifth direction, and the fourth direction and the fifth direction are opposite.

[0056] It can be understood that in the present embodiment, two ends of the driven roller 240 are respectively penetrated by two slide grooves 262 on the second mounting plate 260. It should be understood that the length dimension of the slide groove 262 is greater than the diameter of the two ends of the driven roller 240, so that the driven roller 240 can slide in the slide groove 262. When the sliding distances of the two ends of the driven roller 240 relative to the corresponding slide grooves 262 are inconsistent, the driven roller 240 can be tilted relative to the second mounting plate 260 and tilted to face the third direction. Since the belt 220 is wound around one side of the driven roller 240, specifically, the belt 220 is wound around the side of the outer circumference of the driven roller 240 away from the active roller 230, the belt 220 has a tensioning force, which can give the driven roller 240 a force tending to the fourth direction, that is, drive the driven roller 240 toward the active roller 230; and the adjusting member 272 abuts against the other side of the driven roller 240, specifically, the adjusting member 272 abuts against the side of the rotating shaft of the driven roller 240 close to the active roller 230, so as to give the driven roller 240 a force tending to the fourth direction. The force in the fifth direction drives the driven roller 240 away from the active roller 230, and since the fourth direction and the fifth direction are relative to each other, the force on the driven roller 240 is kept balanced. Therefore, the driven roller 240 can be fixed relative to the second mounting plate 260 without using an additional fixing structure. The structure is simple, and when the inclination angle of the driven roller 240 relative to the second mounting plate 260 needs to be adjusted, it is only necessary to screw the adjusting piece 272, which can save the time of disassembling the fixing structure and facilitate adjustment.

[0057] In other embodiments, the driven roller 240 and the second mounting plate 260 may also be connected via a universal joint, so that the driven roller 240 swings relative to the second mounting plate 260 .

[0058] Reference Figure 5 According to some embodiments of the present application, one end of the slide groove 262 away from the fixing block 271 passes through the second mounting plate 260 .

[0059] It is understandable that by passing the end of the slide groove 262 away from the fixed block 271 through the second mounting plate 260, a gap is formed on the second mounting plate 260, and the rotating shaft of the driven roller 240 can enter and exit the slide groove 262 through the gap, so as to facilitate the disassembly and assembly of the driven roller 240.

[0060] Reference Figure 1 According to some embodiments of the present application, it also includes a frame 400 and a slide bar 500, the slide bar 500 is fixedly connected to the frame 400 along a sixth direction, the sixth direction is perpendicular to the first direction, and the first conveyor belt assembly 100 and the second conveyor belt assembly 200 can be slidably arranged on the slide bar 500 along the sixth direction.

[0061] It can be understood that the first conveyor belt assembly 100 and the second conveyor belt assembly 200 can be horizontally slid along the slide bar 500 to adjust the distance between the first conveyor belt assembly 100 and the second conveyor belt assembly 200 to adapt to different paperboard widths.

[0062] Specifically, the slide bar 500 passes through the second mounting plate 260 of the second conveyor belt assembly 200, and the second mounting plate 260 can slide on the slide bar 500 to drive the motor 210, belt 220, active roller 230 and driven roller 240 on the second mounting plate 260 to slide horizontally along the sixth direction.

[0063] Of course, in some other embodiments, in order to facilitate the installation of the first conveyor line and the second conveyor line, the conveying device of the present application also includes a first fixed seat and a second fixed seat, the first fixed seat and the second fixed seat are arranged along the first direction, the slide bar 500 passes through the first fixed seat and the second fixed seat, the first fixed seat and the second fixed seat are both slidably matched with the slide bar 500, so as to be able to slide along the sixth direction, the first conveyor belt assembly 100 is arranged on the first fixed seat, and the second conveyor belt assembly 200 is arranged on the second fixed seat. Among them, the first conveyor belt assembly 100 and the first fixed seat are detachably connected; the second conveyor belt assembly 200 and the first fixed seat are detachably connected. In this way, the disassembly and assembly of the first conveyor belt assembly 100 and the second conveyor belt assembly 200 can be facilitated.

[0064] Reference Figure 1 According to some embodiments of the present application, the width of the conveying surface of the second conveyor belt assembly 200 is greater than the width of the conveying surface of the first conveyor belt assembly 100 .

[0065] It can be understood that, since the second conveyor belt assembly 200 provides a portion of the cardboard with a directional force toward the first direction during the conveying process, the conveying surface of the second conveyor belt assembly 200 is made larger to ensure that the second conveyor belt assembly 200 can provide the cardboard with sufficient directional force toward the positioning plate 300, thereby ensuring that the cardboard can fit with the positioning plate 300 within a short distance to complete the positioning and regularization.

[0066] The inkjet printer according to the second embodiment of the present application includes the cardboard conveying device of the first embodiment.

[0067] The inkjet printer according to the second embodiment of the present application has at least the following beneficial effects: all the beneficial effects of the cardboard conveying device including the first embodiment are no longer repeated here.

[0068] Specifically, the inkjet printer also includes an inkjet device, which is located on one side of the cardboard conveying device along the first direction and can spray codes on the cardboard conveyed by the cardboard conveying device.

[0069] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A cardboard conveying device, used for conveying cardboard along a first direction, characterized in that: include: A first conveyor belt assembly is arranged along a first direction; A second conveyor belt assembly is arranged along a second direction; A positioning plate is arranged on a side of the second conveyor belt assembly away from the first conveyor belt assembly, and the positioning plate is arranged along the first direction, wherein the second direction intersects with the first direction and is inclined toward the positioning plate.

2. The cardboard conveying device according to claim 1, characterized in that: The second conveyor belt assembly includes a motor, a belt, a driving roller and a driven roller, the motor drives the driving roller, and the belt is wound around the driving roller and the driven roller; wherein the axis line of the driving roller and the axis line of the driven roller are arranged along a third direction, and the third direction is perpendicular to the second direction.

3. The cardboard conveying device according to claim 2, characterized in that: The second conveyor belt assembly also includes a first mounting plate and two second mounting plates, the first mounting plate having a first mounting surface and a second mounting surface, the first mounting surface is parallel to the first direction, the second mounting surface is parallel to the second direction, the second mounting plate is arranged along the first direction and has a third mounting surface, the third mounting surface is parallel to the first direction; the active roller and the driven roller are both rotatably arranged on the first mounting plate; wherein the first mounting surface is connected to the third mounting surface, and the motor is installed on the second mounting surface.

4. The cardboard conveying device according to claim 3, characterized in that: The two ends of the driven roller can swing relative to the second mounting plate; the second conveyor belt assembly also includes two adjustment structures, at least one of which is provided on each of the second mounting plates, and corresponds to the two ends of the driven roller, the adjustment structure includes a fixed block and an adjustment member, the fixed block is fixed to the second mounting plate, one end of the adjustment member is connected to the fixed block, and the other end can move away from or close to the fixed block, and can be connected to one end of the driven roller.

5. The cardboard conveying device according to claim 4, characterized in that: One end of the adjusting member is threadedly connected to the fixing block, and the other end is abutted against one end of the driven roller.

6. The cardboard conveying device according to claim 5, characterized in that: A slide groove is provided on the first mounting plate, and the slide groove extends along the first direction. The belt is wound around one side of the driven roller to give the driven roller a force tending to a fourth direction. The adjusting member is connected to the other side of the driven roller to give the driven roller a force tending to a fifth direction, and the fourth direction and the fifth direction are opposite to each other.

7. The cardboard conveying device according to claim 6, characterized in that: One end of the slide slot away from the fixing block passes through the second mounting plate.

8. The cardboard conveying device according to claim 1, characterized in that: It also includes a frame and a slide bar, wherein the slide bar is fixedly connected to the frame along a sixth direction, the sixth direction is perpendicular to the first direction, and the first conveyor belt assembly and the second conveyor belt assembly are slidably arranged on the slide bar along the sixth direction.

9. The cardboard conveying device according to claim 1, characterized in that: The width of the conveying surface of the second conveyor belt assembly is greater than the width of the conveying surface of the first conveyor belt assembly.

10. Inkjet printer, characterized in that, The invention comprises a cardboard conveying device as claimed in any one of claims 1 to 9.

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