Paper turnover device and working method thereof

Abstract

The invention relates to a paper turnover device and a working method thereof. The paper turnover device comprises an inner-layer guide plate and an outer-layer guide plate, a belt supporting roller row is arranged on the edge of the inner-layer guide plate; the belt supporting roller row corresponds to the outer-layer guide plate in position, and a gap is reserved between the outer arc surface of the belt supporting roller row and the outer-layer guide plate; an inner-layer driving wheel and an inner-layer tensioning wheel are arranged on the inner-layer guide plate, and the inner-layer conveying belt is wound on the inner-layer driving wheel through a belt supporting roller row and the inner-layer tensioning wheel; an outer-layer wheel set and an outer-layer driving wheel are arranged on the outer-layer guide plate; and the outer-layer conveying belt is wound on the outer-layer driving wheel through the outer-layer wheel group. Compared with the prior art, in the paper turnover device, the outer-layer conveying belt can be naturally attached to the arc-section belt face of the inner-layer conveying belt, the inner-layer conveying belt and the outer-layer conveying belt can clamp paper to rotate by 180 degrees along the arc-section belt face under the driving of the driving wheels of the inner-layer conveying belt and the outer-layer conveying belt, and therefore paper boards can be turned over, the paper boards cannot move in the turnover process, and the turnover efficiency of the paper boards is improved. The turnover speed is high, and the paper is accurately positioned after being turned over.

Description

Technical Field

[0001] The invention relates to the technical field of packaging machinery, and in particular to a paper turning device and a working method thereof. Background Art

[0002] In the box and carton gluing equipment, the blank cardboards stacked on the paper feed belt are pulled out one by one by the paper feed belt from the gap formed between the paper feed knife and the paper feed belt. In order to avoid scratches on the printed surface of the blank cardboard by the paper feed knife, the blank cardboards need to be stacked with their printed surface facing down toward the surface of the paper feed belt. In this case, when information such as product production time is to be sprayed on the printed surface of the blank cardboard, the spray terminal can only be placed on its back to spray ink upward. Under the action of gravity, a certain amount of ink will fall back to the spray terminal. As the amount of ink falling back accumulates and increases, uneven ink marks or direct ink spots will appear on the paper, resulting in waste and defective products. In addition, when the amount of ink falling back reaches a certain level, it will also cause the holes of the spray terminal to be blocked, which will bring the trouble of stopping the machine for cleaning.

[0003] In order to solve the problem of the inkjet printer working in an upside-down position, a good idea is to turn the blank cardboard over during transportation, that is, to change the printing surface of the blank cardboard from the original downward position to the upward position, so that the inkjet printer can be set to spray downward, and there will be no accumulation of ink on the inkjet printer and blockage of the inkjet printer holes. In order to enable the blank cardboard to be turned over during transportation, equipment manufacturers in the industry have also adopted some methods, such as a double-sided printing machine with a turning device disclosed in CN211280212U, a cardboard printing turning device disclosed in CN219258985U, etc., but these methods generally have defects such as slow turning speed and inaccurate positioning of paper after turning over due to structural and other reasons.

[0004] Therefore, there is an urgent need for a paper turning device to increase the turning speed and accurately position the turned paper. Summary of the invention

[0005] The purpose of the present invention is to provide a paper turning device and a working method thereof in order to overcome the defects of the above-mentioned prior art. Through the structural setting, the outer conveyor belt can naturally cling to the arc segment belt surface of the inner conveyor belt, and the inner and outer conveyor belts can hold the paper and rotate 180 degrees along the arc surface under the drive of their respective driving wheels, thereby realizing the turning of the paperboard, and the paperboard will not move during the turning process. It has the advantages of fast turning speed and accurate positioning of the paper after turning.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The first object of the present invention is to provide a paper turning device, which comprises an inner guide plate and an outer guide plate; a belt support roller row is arranged on the edge of the inner guide plate, and the belt support roller row is in an arc shape; the belt support roller row corresponds to the position of the outer guide plate, and a gap is left between the outer arc surface of the belt support roller row and the outer guide plate; an inner driving wheel is rotatably arranged on the inner guide plate, an inner tensioning wheel is arranged on the inner guide plate, and the inner conveyor belt is wrapped around the inner driving wheel through the belt support roller row and the inner tensioning wheel; an outer wheel group and an outer driving wheel are arranged on the outer guide plate; the outer driving wheel is rotatably connected to the outer guide plate; the outer conveyor belt is wrapped around the outer driving wheel through the outer wheel group.

[0008] Furthermore, the outer wheel group includes an outer end wheel, an outer tail wheel, an outer tension wheel and an outer transition wheel; one edge of the outer conveyor belt passes through the gap between the outer arc surface of the belt support roller row and the outer guide plate, and is wrapped around the outer drive wheel through the outer end wheel, the outer tail wheel, the outer tension wheel and the outer transition wheel.

[0009] Furthermore, a support arm is hinged on the outer guide plate; and the outer tail wheel is fixed on the support arm.

[0010] Furthermore, a compression spring is installed on the support arm near the outer tail wheel from the hinge point, and the support arm abuts against the adjustment screw at the other end of the hinge point. That is, the outer tail wheel is fixed on the support arm, the support arm is hinged on the outer guide plate, a compression spring is installed on the support arm near the outer tail wheel from the hinge point, and the support arm abuts against the adjustment screw at the other end of the hinge point, so that the height position of the outer tail wheel can be adjusted by adjusting the support arm, ensuring that papers of different thicknesses can be smoothly output.

[0011] Furthermore, the edge of the inner guide plate is arranged in a convex arc shape.

[0012] Furthermore, the belt support roller row includes an inner plate, an outer plate, and belt support rollers; the belt support rollers are installed between the inner plate and the outer plate.

[0013] Furthermore, the belt support rollers are separate rollers, and the belt support rollers are assembled one by one along the convex arc-shaped edges.

[0014] Furthermore, the inner layer guide plate is also provided with an inner layer end wheel, an inner layer tail wheel, a guide wheel and an inner layer transition roller; the inner layer conveyor belt is wrapped around the inner layer drive wheel through the inner layer end wheel, the inner layer tail wheel, the guide wheel and the inner layer transition roller, the belt support roller row and the inner layer tensioning wheel.

[0015] Furthermore, the wheel surfaces of the guide pulley and the inner tail wheel are higher than the belt support roller surface or tangent to the belt support roller surface. The belt support roller surface is an circumscribed arc surface formed by the belt support rollers at the two ends and the middle of the belt support roller row. In this way, the tensile pressure exerted by the inner conveyor belt on the belt support rollers at both ends of the belt support roller row is borne by the guide pulley and the inner tail wheel, thereby enhancing the reliability of the belt support roller row.

[0016] Furthermore, the inner layer end wheel is arranged at the arc center of the belt roller row relative to the guide wheel. By arranging the inner layer end wheel relative to the guide wheel at the arc center, the inner layer conveyor belt naturally forms an upward inclined surface at the two wheels, and the inclined surface and the outer layer conveyor belt form a paper feeding angle a with an open mouth. The inner layer transition roller guides the inner layer conveyor belt to avoid physical interference with other parts.

[0017] A second object of the present invention is to provide a working method of a paper turning device, comprising the following steps:

[0018] The inner driving wheel and the outer driving wheel respectively drive the inner conveyor belt and the outer conveyor belt to operate synchronously at the same speed. The cardboard fed from the paper inlet is transported 180 degrees along the belt roller row under the clamping action of the inner conveyor belt and the outer conveyor belt. The cardboard is naturally turned over automatically, which means that the paper can be fed with the printing surface b facing down. The printing surface b is turned upside down for coding, which has the conditions for high-speed coding. In the whole turning process, the cardboard is clamped by the belt all the time, and there will be no position shifting. At the same time, the cardboard can achieve a very high turning speed by following the movement of the belt.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) The technical solution provides a paper turning device and a working method thereof. Through the structural setting, the outer conveyor belt can naturally cling to the arc segment belt surface of the inner conveyor belt. The inner and outer conveyor belts can hold the paper and rotate 180 degrees along the arc surface under the drive of their respective driving wheels, thereby realizing the turning of the paperboard, and the paperboard will not move during the turning process. It has the advantages of fast turning speed and accurate positioning of the paper after turning. The method for realizing paper turning is simple and fast.

[0021] 2) The technical solution provides a paper turning device, in which the wheel surfaces of the guide wheel and the inner tail wheel are higher than the belt support roller surface or tangent to the belt support roller surface. The belt support roller surface is an circumscribed arc surface formed by the belt support rollers at both ends and in the middle of the belt support roller row. The pulling pressure applied by the inner conveyor belt on the belt support rollers at both ends of the belt support roller row is borne by the guide wheel and the inner tail wheel, thereby enhancing the reliability of the belt support roller row.

[0022] 3) The technical solution provides a paper turning device, which sets the inner end wheel guide wheel offset from the arc center of the belt roller row. The inner conveyor belt naturally forms an upward inclined surface at the two wheels, and the inclined surface and the outer conveyor belt form an open-mouth paper feeding angle a. The inner transition roller guides the inner conveyor belt to avoid physical interference with other parts.

[0023] 4) The paper turning device provided by the technical solution can adjust the height position of the outer tail wheel by adjusting the support arm, thereby ensuring that papers of different thicknesses can be smoothly output. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the paper turning device in Example 1 of the present technical solution.

[0025] Figure 2 This is a schematic structural diagram of the belt support roller row of the paper turning device in Example 1 of the present technical solution.

[0026] Figure 3 This is a schematic diagram of the structure of the paper turning device in Example 2 of the present technical solution.

[0027] The numbers in the figure show:

[0028] 1. Inner end wheel, 2. Inner guide plate, 3. Inner tensioning wheel, 4. Inner driving wheel, 5. Inner transition roller, 6. Inner conveyor belt, 7. Outer tail wheel, 8. Support arm, 9. Inner tail wheel, 10. Outer conveyor belt, 11. Outer transition belt, 12. Outer driving wheel, 13. Outer tensioning wheel, 14. Outer end wheel, 15. Guide wheel, 16. Belt support roller row, 161. Inner side plate, 162. Outer side plate, 163. Belt support roller, 17. Outer guide plate, 18. Cardboard. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The features such as component models, material names, connection structures, control methods, etc. that are not clearly described in this technical solution are all regarded as common technical features disclosed in the prior art.

[0030] The technical solution provides a paper turning device including an inner guide plate 2 and an outer guide plate 17. A belt-supporting roller row 16 is arranged on the edge of the inner guide plate 2. The belt-supporting roller row 16 is in an arc shape. The belt-supporting roller row 16 corresponds to the outer guide plate 17 in position. A gap is left between the outer arc surface of the belt-supporting roller row 16 and the outer guide plate 17. An inner driving wheel 4 is rotatably arranged on the inner guide plate 2. An inner tensioning wheel 3 is arranged on the inner guide plate 2. The conveyor belt 6 is wrapped around the inner driving wheel 4 through the belt support roller row 16 and the inner tensioning wheel 3. The outer driving wheel 12, the outer end wheel 14, the outer tail wheel 7, the outer tensioning wheel 13 and the outer transition wheel 11 are arranged on the outer guide plate 17. The outer driving wheel 12 is rotatably connected to the outer guide plate 17. The outer conveyor belt 10 is wrapped around the outer driving wheel 12 through the outer end wheel 14, the outer tail wheel 7, the outer tensioning wheel 13 and the outer transition wheel 11.

[0031] The belt support roller row 16 is a combination, which includes an inner plate 161 , an outer plate 162 , and a plurality of belt support rollers 163 installed between the inner plate 161 and the outer plate 162 .

[0032] The edge of the inner guide plate 2 is arranged in a convex arc shape, and the belt-supporting roller row 16 is a separate roller, which is assembled one by one along the convex arc edge.

[0033] The inner layer guide plate 2 is also provided with an inner layer end wheel 1, an inner layer tail wheel 9, a guide pulley 15 and an inner layer transition roller 5. The inner layer end wheel 1 is arranged at an arc center relative to the guide pulley 15.

[0034] The wheel surfaces of the guide pulley 15 and the inner tail pulley 9 are slightly higher than or aligned with the belt support roller surfaces in the belt support roller row 16, so that the pulling pressure applied by the inner conveyor belt 6 to the belt support rollers 163 at both ends of the belt support roller row 16 is borne by the guide pulley 15 and the inner tail pulley 9, thereby enhancing the reliability of the belt support roller row 16. In addition, by arranging the inner end wheel 1 at an arc center offset relative to the guide pulley 15, the inner conveyor belt 6 naturally forms an upward inclined surface at the two wheels, and the inclined surface and the outer conveyor belt 10 form an open-mouth paper feeding angle a, and the inner transition roller 5 guides the inner conveyor belt 6 to avoid physical interference with other parts.

[0035] The outer tail wheel 7 is fixed on the support arm 8, and the support arm 8 is hinged on the outer guide plate 17. A compression spring is installed on the support arm 8 near the outer tail wheel 7 near the hinge point. The support arm 8 is against the adjusting screw at the other end of the hinge point. In this way, the height position of the outer tail wheel 7 can be adjusted by adjusting the support arm 8, ensuring that papers of different thicknesses can be smoothly output.

[0036] Example 1

[0037] This embodiment provides a paper turning device, such as Figures 1-2As shown, the paper turning device is used to turn over the paperboard 18, and the paper turning device includes an inner guide plate 2 and an outer guide plate 17, the inner guide plate 2 and the outer guide plate 17 are arranged correspondingly, and a belt support roller row 16 ( Figure 2As shown), the belt support roller row 16 is a combination, which includes an inner plate 161, an outer plate 162 and a plurality of belt support rollers 163 installed between the inner plate 161 and the outer plate 162. The belt support roller row 16 is in an arc shape, and the position of the belt support roller row 16 corresponds to the outer guide plate 17. A gap is left between the outer arc surface of the belt support roller row 16 and the outer guide plate 17. The inner driving wheel 4 is rotatably arranged on the inner guide plate 2. The inner tensioning wheel 3, the inner end wheel 1, the inner tail wheel 9, the guide pulley 15 and the inner transition roller 5 are arranged on the inner guide plate 2. The layer end wheel 1 is arranged relative to the guide wheel 15 at the arc center of the supporting belt roller row 16. The wheel surface of the guide wheel 15 and the inner tail wheel 9 is higher than the supporting belt roller surface or tangent to the supporting belt roller surface. The supporting belt roller surface is the circumscribed arc surface formed by the supporting belt rollers 163 at the two ends and the middle of the supporting belt roller row 16. The inner conveyor belt 6 is wrapped around the inner driving wheel 4 through the supporting belt roller row 16, the inner tensioning wheel 3, the inner end wheel 1, the inner tail wheel 9, the guide wheel 15 and the inner transition roller 5. In this way, the inner conveyor belt 6 is applied to the supporting belt rollers 163 at the two ends of the supporting belt roller row 16. The pulling pressure is borne by the guide pulley 15 and the inner tail wheel 9, which enhances the reliability of the belt roller row 16, and the inner transition roller 5 guides the inner conveyor belt 6 to avoid physical interference with other parts, and the inner tensioning wheel 3 tensions the inner conveyor belt 6; the outer guide plate 17 is provided with an outer driving wheel 12, an outer end wheel 14, an outer tail wheel 7, an outer tensioning wheel 13 and an outer transition wheel 11, the outer driving wheel 12 is rotatably connected to the outer guide plate 17, the outer guide plate 17 is hinged with a support arm 8, and the outer The tail wheel 7 is fixed on the support arm 8, and a compression spring is installed on the support arm 8 near the outer tail wheel 7 near the hinge point. The support arm 8 is against the adjusting screw at the other end of the hinge point, and the adjusting screw is threadedly connected to the outer guide plate 17, so that one edge of the outer conveyor belt 10 passes through the gap between the outer arc surface of the belt support roller row 16 and the outer guide plate 17, and is wrapped around the outer driving wheel 12 through the outer end wheel 14, the outer tail wheel 7, the outer tensioning wheel 13 and the outer transition wheel 11, so that the surface of the outer conveyor belt 10 can be close to the surface of the inner conveyor belt 6 under the action of the outer tensioning wheel 13.By making the wheel surfaces of the guide pulley 15 and the inner tail pulley 9 higher than the belt support roller surface or tangent to the belt support roller surface, the belt support roller surface is an circumscribed arc surface formed by the belt support rollers 163 at the two ends and the middle of the belt support roller row 16. In this way, the pulling pressure applied by the inner conveyor belt 6 to the belt support rollers 163 at the two ends of the belt support roller row 16 is borne by the guide pulley 15 and the inner tail pulley 9, thereby enhancing the reliability of the belt support roller row 16. In addition, by setting the inner end wheel 1 offset from the center of the arc relative to the guide pulley 15, the inner conveyor belt 6 naturally forms an upward inclined surface at the two wheels, and the inclined surface and the outer conveyor belt 10 form a paper feeding angle a with an open mouth, which ensures that the cardboard can smoothly enter the clamping and turning area formed by the inner and outer belts. The height position of the outer tail wheel 7 can be adjusted by adjusting the support arm 8, thereby ensuring that papers of different thicknesses can be smoothly output. The edge of the inner layer guide plate 2 is arranged in a convex arc shape, and the belt support rollers 163 of the belt support roller row 16 are separate rollers, which are assembled one by one along the convex arc edge. For narrow width paper, this structure has the advantage of saving space.

[0038] The belt support roller surface is an circumscribed arc surface formed by the belt support rollers 163 at the two ends and in the middle of the belt support roller row 16 .

[0039] The arc segment belt surface refers to the outer side surface of the arc segment of the inner conveyor belt 6.

[0040] The inner conveyor belt 6 and the outer conveyor belt 10 are both belts.

[0041] During operation, the inner driving wheel 4 and the outer driving wheel 12 respectively drive the inner conveyor belt 6 and the outer conveyor belt 10 to operate synchronously at the same speed, so that the cardboard 18 fed from the paper inlet is transported 180 degrees along the belt support roller row 16 under the clamping action of the inner and outer belts (the inner conveyor belt 6 and the outer conveyor belt 10). The cardboard 18 is naturally turned over automatically, which means that the paper can be fed with the printing surface b facing down, and the coding is sprayed when the printing surface b is turned up, which has the conditions for high-speed coding. In addition, the cardboard 18 is clamped by the belt throughout the turning process, and there will be no position movement. At the same time, the cardboard 18 can achieve a very high turning speed by following the movement of the belt.

[0042] Example 2

[0043] like Figure 3 As shown, Figure 3 In this embodiment, Figure 1 A structural schematic diagram of a paper turning device for combined application of a paper turning device.

[0044] For paper width, you can Figure 1 The disclosed structures can be combined in parallel in several ways, and the practical application is not limited to Figure 3The four groups shown in the figure (four groups of paper turning devices in embodiment 1 are arranged in parallel) may be less than or more than four groups. (The feeding direction is shown in the figure)

[0045] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A paper turning device, characterized in that: The paper turning device comprises an inner guide plate (2) and an outer guide plate (17); A belt-supporting roller row (16) is arranged on the edge of the inner guide plate (2), and the belt-supporting roller row (16) is in an arc shape; The belt-supporting roller row (16) corresponds to the outer guide plate (17) in position, and a gap is left between the outer arc surface of the belt-supporting roller row (16) and the outer guide plate (17); An inner driving wheel (4) is rotatably provided on the inner guide plate (2), an inner tensioning wheel (3) is provided on the inner guide plate (2), and the inner conveyor belt (6) is wrapped around the inner driving wheel (4) via a belt supporting roller row (16) and the inner tensioning wheel (3); The outer guide plate (17) is provided with an outer wheel set and an outer driving wheel (12); The outer driving wheel (12) is rotatably connected to the outer guide plate (17); The outer conveyor belt (10) is wrapped around the outer driving wheel (12) via an outer wheel set.

2. A paper turning device according to claim 1, characterized in that: The outer wheel assembly comprises an outer end wheel (14), an outer tail wheel (7), an outer tension wheel (13) and an outer transition wheel (11); One edge of the outer conveyor belt (10) passes through the gap between the outer arc surface of the belt support roller row (16) and the outer guide plate (17), and is wrapped around the outer drive wheel (12) through the outer end wheel (14), the outer tail wheel (7), the outer tension wheel (13) and the outer transition wheel (11).

3. A paper turning device according to claim 2, characterized in that: A support arm (8) is hingedly supported on the outer guide plate (17); The outer tail wheel (7) is fixed on the support arm (8).

4. A paper turning device according to claim 3, characterized in that: A compression spring is installed on the support arm (8), and an adjusting screw rod is pressed against the support arm (8).

5. A paper turning device according to claim 1, characterized in that: The edge of the inner layer guide plate (2) is arranged in a convex arc shape.

6. A paper turning device according to claim 5, characterized in that: The belt support roller row (16) comprises an inner plate (161), an outer plate (162), and belt support rollers (163); The belt supporting roller (163) is installed between the inner plate (161) and the outer plate (162).

7. A paper turning device according to claim 6, characterized in that: The belt-supporting rollers (163) are separate rollers, and the belt-supporting rollers (163) are assembled one by one along the convex arc-shaped edges.

8. A paper turning device according to claim 7, characterized in that: The inner layer guide plate (2) is also provided with an inner layer end wheel (1), an inner layer tail wheel (9), a guide wheel (15) and an inner layer transition roller (5); The inner conveyor belt (6) is wrapped around the inner driving wheel (4) via an inner end wheel (1), an inner tail wheel (9), a guide wheel (15), an inner transition roller (5), a belt support roller row (16) and an inner tensioning wheel (3).

9. A paper turning device according to claim 8, characterized in that: The wheel surfaces of the guide wheel (15) and the inner tail wheel (9) are higher than the belt support roller surface or are tangent to the belt support roller surface, and the belt support roller surface is an circumscribed arc surface formed by the belt support rollers (163) at both ends and in the middle of the belt support roller row (16); The inner layer end wheel (1) is arranged at the arc center of the biasing belt roller row (16) relative to the guide belt wheel (15).

10. A method for operating the paper turning device according to any one of claims 1 to 9, characterized in that: The steps include: The inner layer driving wheel (4) and the outer layer driving wheel (12) respectively drive the inner layer conveyor belt (6) and the outer layer conveyor belt (10) to operate synchronously at the same speed. The paperboard (18) fed from the paper inlet is transported 180 degrees along the belt support roller row (16) under the clamping action of the inner layer conveyor belt (6) and the outer layer conveyor belt (10), and the paperboard (18) is automatically turned over.

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