Green printing system and green printing method based on dual induction

Abstract

The invention relates to the technical field of printing, in particular to a green printing system and method based on dual induction, and the system comprises a bearing block, a paper inlet, a driving wheel, a detection device and a screening device; the following problems in the printing process in the prior art can be solved: corresponding detection cannot be performed on paper, so that the paper with folds is directly conveyed into a printing machine for printing, and uneven paper cannot be removed, so that printed patterns or characters are damaged, and the printing effect is influenced; induction type detection can be carried out on the flatness of paper fed into the printing machine in advance, wrinkled paper is removed, and the phenomenon that the wrinkled paper influences the printing effect is avoided; the paper can be discharged and recycled or conveyed into the printing machine for printing according to the induction detection result of the paper, so that flatness detection and substandard paper screening can be performed on the paper in a dual-induction manner, and the printing effect is ensured.

Description

Technical Field

[0001] The invention relates to the field of printing technology, and in particular to a green printing system and a green printing method based on dual induction. Background Art

[0002] Printing is the process of printing ink onto the surface of paper, fabric, leather and other supporting materials through processes such as plate making, inking and pressurizing. A printing press is usually composed of mechanisms such as plate loading, inking, embossing and paper feeding. However, when putting paper into the printing press, it is necessary to ensure that the paper remains flat to improve the printing effect. Green printing refers to the use of environmentally friendly materials and processes, which produces less pollution and saves resources and energy during the printing process. Printed products are easy to recycle and reuse after disposal, are naturally degradable, and have little impact on the ecological environment.

[0003] In the prior art, green printing and corresponding technologies are also disclosed. For example, Chinese patent publication number CN111376584A discloses a green printing system and a green printing method based on dual induction. The disclosed green printing system includes a paper cutter, a printing machine and a dryer. When the prior art is used, the paper is cut by the paper cutter, and then the printing machine prints ink, and then the operator sends the paper to the dryer for drying.

[0004] However, there are still the following disadvantages in the printing process using the above-mentioned prior art:

[0005] 1. If the paper is wrinkled, bent or other uneven, it is easy to cause defects such as missing printed patterns. However, the above-mentioned prior art is unable to perform corresponding detection on the paper during the printing process, so that the wrinkled paper is directly transported to the printing machine for printing. The wrinkled paper is uneven and has raised and sunken parts, which causes missing printed patterns or texts, thereby affecting the printing effect.

[0006] 2. In addition, the above-mentioned prior art is not only unable to detect paper, but also unable to remove uneven paper, so that uneven paper is mixed with flat paper for printing, which further affects the printing effect, and paper with printing defects cannot be used, and then needs to be reprinted, which wastes resources and affects printing efficiency.

[0007] Therefore, based on the above-stated viewpoints, there is still room for improvement in the green printing methods of the prior art. Summary of the invention

[0008] In order to solve the above problems, the present invention provides a green printing system based on dual sensing, including a supporting block connected to a paper feeding mechanism, a paper feed port for inserting paper into the paper feeding mechanism is opened on the supporting block, two driving wheels are installed inside the supporting block for symmetrical rotation along the paper feed port, a detection device for detecting the flatness of paper is arranged on the side of the driving wheel close to the paper feeding mechanism inside the supporting block, the detection device includes contact wheels abutting against the upper and lower sides of the paper, a screening device for screening out uneven paper is installed on the side of the detection device close to the paper feeding mechanism inside the supporting block, and the screening device includes a guide cylinder connected to the paper feed port.

[0009] As a preferred technical solution of the present invention, two rotating grooves for accommodating driving wheels are symmetrically opened up and down along the paper feed port inside the supporting block, and the ends of the two driving wheels are both provided with mutually meshing gears. A control motor connected to any one of the driving wheels is installed on the side wall of the supporting block through a motor seat.

[0010] As a preferred technical solution of the present invention, the detection device also includes two receiving grooves symmetrically opened in the upper and lower directions along the paper inlet inside the bearing block, a plurality of displacement blocks equidistantly distributed along the length direction are slidably arranged inside the receiving groove, and contact wheels are rotatably installed on opposite sides of the upper and lower groups of displacement blocks;

[0011] Both side walls of the accommodating groove in the width direction are provided with limited sliding grooves, and the side walls of the displacement block are equipped with two supporting ears that are slidably docked in the limited sliding grooves, and a supporting spring rod is installed between the supporting ears and the inner wall of the limited sliding groove.

[0012] As a preferred technical solution of the present invention, a horizontal plate is installed inside each of the accommodating grooves on the side of the displacement block away from the contact wheel, and a plurality of connecting rods corresponding to the positions of the displacement blocks are rotatably installed on the horizontal plate, an electrode sheet is installed on the end of the connecting rod close to the displacement block, a contact pad is provided on the side of the displacement block close to the connecting rod, an adjustment unit is installed between the connecting rod and the supporting block, a controller is provided inside the supporting block, and the controller is electrically connected to the plurality of contact pads.

[0013] As a preferred technical solution of the present invention, the adjusting unit includes a pulley, and a plurality of pulleys sleeved on the outside of a connecting rod are rotatably installed on one side of the horizontal plate away from the displacement block. A transmission thread is provided on the outer wall of the connecting rod, and the connecting rod cooperates with the inner wall of the pulley through the transmission thread. A double-headed motor is installed inside the bearing block, and the double-headed motor is electrically connected to the controller. Transmission wheels are sleeved on the outer walls of the output shafts on the upper and lower sides of the double-headed motor, and belts are sleeved between the upper and lower transmission wheels and the multiple pulleys on the upper and lower sides respectively.

[0014] As a preferred technical solution of the present invention, the outer wall of the connecting rod is evenly provided with a plurality of annularly distributed longitudinal grooves, the horizontal plate is provided with a plurality of through holes for the connecting rod to movably pass through, and the inner wall of the through hole is installed with a plurality of fixed teeth that are slidably docked in the longitudinal grooves.

[0015] As a preferred technical solution of the present invention, two transmission groups symmetrically distributed along the width direction of the accommodating groove are installed inside the supporting block, each transmission group includes two supports respectively installed on the upper and lower side walls of the paper feed port, and two linkage shafts are installed on the opposite sides of the two supports of each transmission group for symmetrical rotation along their width direction, and the linkage shafts on the two supports on the side away from the paper feeding mechanism are respectively connected to the two driving wheels through belt transmission.

[0016] As a preferred technical solution of the present invention, the screening device also includes a paper outlet opened inside the bearing block, the paper outlet is located on a side close to the paper feeding mechanism, the upper and lower side walls in the middle of the paper outlet are rotatably mounted with shafts, a guide cylinder is rotatably connected between the two shafts, a paper feeding port and a paper discharge port connected to the paper outlet are respectively opened on the upper and lower sides of the side close to the paper feeding mechanism inside the bearing block, and a control unit is installed between the guide cylinder and the bearing block;

[0017] The guide cylinder is an elastic telescopic structure, and two rotating columns are installed on the side of the guide cylinder away from the rotating shaft for vertical symmetrical rotation, and the two rotating columns are rotatably abutted against the inner wall of the paper outlet.

[0018] As a preferred technical solution of the present invention, the control unit includes a linkage rod, and the linkage rods are installed on both side walls of the guide cylinder in the length direction, a reciprocating slide groove is provided inside the bearing block, an auxiliary block is slidably provided inside the reciprocating slide groove, a connecting hole for the linkage rod to slide through is provided on the auxiliary block, and a vertical hole for the linkage rod to slide through is provided between the paper outlet and the reciprocating slide groove;

[0019] Two adjusting screws are symmetrically rotated along the length direction on the auxiliary block, and multiple adjusting screws are connected by belt transmission. A positioning motor connected to any adjusting screw is installed inside the bearing block, and the positioning motor and the controller are electrically connected.

[0020] In addition, the present invention also provides a green printing method based on dual induction, comprising the following steps:

[0021] S1: Paper placement: First, insert the paper required for printing into the paper inlet;

[0022] S2: Paper transport: by controlling the two driving wheels to rotate in opposite directions and transporting the paper to the side close to the paper transport mechanism;

[0023] S3: Paper detection: The flatness of the paper is detected by the detection device to ensure that the flatness of the paper meets the printing standards;

[0024] S4: Paper screening: The uneven paper is sent out from the carrier block through the screening device and recycled.

[0025] In summary, this application includes the following beneficial technical effects:

[0026] 1. The present invention can detect the flatness of paper through the upper and lower groups of contact wheels. Paper with wrinkles will support the contact wheels and drive the displacement block to retract into the accommodating groove. The displacement block drives the contact pad to contact the electrode sheet and transmits a signal to the controller. The controller cooperates with the screening device to send the wrinkled paper out of the supporting block and will not send it into the printing machine, so as to avoid the wrinkled paper affecting the printing effect. In this way, the flatness of the paper sent to the printing machine can be inductively detected in advance to ensure that the printed pattern will not be defective due to the wrinkles of the paper.

[0027] 2. The present invention drives the transmission wheel to rotate through a double-headed motor, the transmission wheel drives the pulley to rotate and the connecting rod moves up or down, the connecting rod drives the electrode sheet to move synchronously and the distance between the electrode sheet and the contact pad gradually increases or decreases, thereby reducing or increasing the sensitivity of contact between the electrode sheet and the contact pad. It is used for inductive detection of the flatness of paper with different printing requirements, and can be adaptively adjusted according to printing requirements. It can not only improve the detection accuracy, but also is easy to operate and adapt to a variety of different printing requirements.

[0028] 3. The present invention can transport paper through multiple linkage shafts on both sides of the detection device, so that the paper can pass through the contact wheel smoothly, thereby ensuring that the paper has sufficient driving force during the detection process to prevent jamming and affecting the paper feeding and printing efficiency; in addition, the linkage shaft can squeeze and flatten the wrinkled part during the paper transportation process, and can flatten wrinkles with smaller amplitudes, and the flattened paper can be used for printing. By flattening the paper, the paper can be fully utilized, further saving resources.

[0029] Fourth, the present invention drives the adjusting screw to rotate forward or reversely through the positioning motor, and the adjusting screw drives the auxiliary block and the linkage rod to move downward or upward as a whole, and drives the guide cylinder to rotate downward to connect with the paper discharge port or rotate upward to connect with the paper feed port, so that the paper can be discharged for recycling or transported to the printing press for printing according to the sensing detection result of the paper. In this way, the flatness of the paper transported to the printing press can be detected and the substandard paper can be screened out by double sensing, thereby ensuring the printing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0031] Figure 1 It is a structural schematic diagram of the present invention.

[0032] Figure 2 It is a schematic diagram of the internal structure of the bearing block of the present invention.

[0033] Figure 3 It is a schematic diagram of the structure between the bearing block, the driving wheel and the screening device of the present invention.

[0034] Figure 4 It is a schematic diagram of the structure between the bearing block and the detection device of the present invention.

[0035] Figure 5 The present invention Figure 4 A partial enlarged view of point A.

[0036] Figure 6 The present invention Figure 4 A partial enlarged view of point B.

[0037] Figure 7 It is a schematic diagram of the structure between the bearing block and the screening device of the present invention.

[0038] Figure 8 The present invention Figure 7 A partial enlarged view of point C.

[0039] Fig. 9 It is a first structural schematic diagram of the screening device of the present invention.

[0040] Fig.10 The present invention Fig. 9 A partial enlarged view of point D.

[0041] Fig.11 It is a second structural schematic diagram of the screening device of the present invention.

[0042] Fig.12 The present invention Fig.11 A partial enlarged view of point E.

[0043] In the figure, 1, paper feeding mechanism; 2, bearing block; 21, paper inlet; 22, support; 23, linkage shaft; 3, driving wheel; 31, gear; 32, control motor; 4, detection device; 41, contact wheel; 42, receiving groove; 43, displacement block; 44, support ear; 45, top support spring rod; 46, horizontal plate; 47, connecting rod; 48, electrode sheet; 49, contact pad; 50, adjustment unit; 501, pulley; 502, double head Motor; 503, transmission wheel; 504, belt; 505, longitudinal slide; 506, fixed tooth; 51, controller; 6, screening device; 61, guide cylinder; 62, paper outlet; 63, rotating shaft; 64, paper feed outlet; 65, paper discharge outlet; 66, control unit; 67, rotating column; 661, linkage rod; 662, reciprocating slide; 663, auxiliary block; 664, vertical hole; 665, adjusting screw; 666, positioning motor. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1-Figure 12 Embodiments of the present invention are described in detail.

[0045] The embodiment of the present application discloses a green printing system based on dual sensing. It should be noted that the present application is mainly used in the process of flatness detection of paper required for printing. In terms of technical effect, the flatness of paper fed into the printing press can be detected by inductive detection in advance to ensure that the printed pattern will not be damaged due to the wrinkles of the paper. In particular, during the detection process, the detection sensitivity can be adaptively adjusted according to the printing requirements, which not only improves the detection accuracy, but also facilitates the operation and is adaptable to a variety of different printing requirements. Furthermore, the present application can also discharge the paper for recycling or transport the paper to the printing press for printing according to the inductive detection results of the paper, so that the paper transported to the printing press can be detected for flatness and substandard paper can be screened out by dual sensing.

[0046] Example:

[0047] Reference Figure 1 , Figure 2 and Figure 3 As shown, a green printing system based on dual sensing includes a supporting block 2 connected to a paper feeding mechanism 1 on an existing printing press, a paper feed port 21 for inserting paper into the paper feeding mechanism 1 is provided on the supporting block 2, the paper feed port 21 is communicated with an opening inside the paper feeding mechanism 1, two driving wheels 3 are installed inside the supporting block 2 for symmetrical rotation along the paper feed port 21, a detection device 4 for detecting the flatness of paper is provided inside the supporting block 2 on a side of the driving wheel 3 close to the paper feeding mechanism 1, the detection device 4 includes contact wheels 41 abutting against the upper and lower sides of the paper, and a screening device 6 for screening out uneven paper is installed inside the supporting block 2 on a side of the detection device 4 close to the paper feeding mechanism 1.

[0048] Furthermore, in the present embodiment, two rotating grooves for accommodating the driving wheels 3 are symmetrically opened up and down along the paper feed port 21 inside the supporting block 2, and the ends of the two driving wheels 3 are sleeved with mutually meshing gears 31, and a control motor 32 connected to any one of the driving wheels 3 is installed on the side wall of the supporting block 2 through a motor seat.

[0049] During the specific implementation process, the paper required for printing is inserted into the paper inlet 21, and then the control motor 32 is started. The control motor 32 drives the driving wheel 3 connected to its output shaft to rotate, and the driving wheel 3 drives the other driving wheel 3 to rotate in the opposite direction through the gear 31, so that the two driving wheels 3 rotate in opposite directions and transport the paper to the side close to the paper feeding mechanism 1; during this period, the flatness of the paper can be detected by the detection device 4 to ensure that the flatness of the paper meets the printing standard, thereby avoiding defects, paper jams and other undesirable phenomena when the printing machine prints on paper with wrinkles, bends and other uneven phenomena, and the uneven paper can be sent out from the supporting block 2 through the screening device 6 to facilitate its recycling and save resources.

[0050] Reference Figure 4 , Figure 5 and Figure 6 As shown, in order to improve the printing effect, it is necessary to ensure that the paper fed into the printing press has a flatness that meets the standards. Based on this, a detection device 4 is provided in this embodiment. Specifically, the detection device 4 also includes two receiving grooves 42 symmetrically opened up and down along the paper inlet 21 inside the carrier block 2, the receiving groove 42 is connected to the paper inlet 21, and the receiving groove 42 is located on the side of the driving wheel 3 close to the paper feeding mechanism 1, and a plurality of displacement blocks 43 equidistantly distributed along the length direction are slidably arranged inside the receiving groove 42, and contact wheels 41 are rotatably installed on the opposite sides of the upper and lower groups of displacement blocks 43.

[0051] Furthermore, in the present embodiment, both side walls in the width direction of the accommodating groove 42 are provided with limiting slide grooves, and the side walls of the displacement block 43 are provided with two supporting ears 44 which are slidably docked in the limiting slide grooves, and a supporting spring rod 45 is installed between the supporting ears 44 and the inner wall of the limiting slide groove. The supporting spring rod 45 always applies an elastic force to the displacement block 43 through the supporting ears 44, so that the displacement block 43 has a tendency to move toward the side close to the paper feed port 21 under the action of the elastic force, and then the upper and lower sets of contact wheels 41 abut against each other in the initial state.

[0052] Furthermore, in the present embodiment, a horizontal plate 46 is installed inside each accommodating groove 42 on the side of the displacement block 43 away from the contact wheel 41, and a plurality of connecting rods 47 corresponding to the position of the displacement block 43 are rotatably installed on the horizontal plate 46, and an electrode sheet 48 is installed on the end of the connecting rod 47 close to the displacement block 43, and a contact pad 49 matching the electrode sheet 48 is provided on the side of the displacement block 43 close to the connecting rod 47. An adjustment unit 50 is installed between the connecting rod 47 and the supporting block 2, and an installation groove is opened inside the supporting block 2, and a controller 51 is provided in the installation groove. The controller 51 is electrically connected to the plurality of contact pads 49. The controller 51 used in the present embodiment is a prior art, which is mainly used to receive signals emitted when the electrode sheet 48 and the contact pad 49 are in contact, and to cooperate with the screening device 6 to send out paper that does not meet the detection standards. The working principle of the controller 51 will not be repeated here.

[0053] In the specific implementation process, when the paper is conveyed between the upper and lower groups of contact wheels 41, multiple contact wheels 41 are pressed against the upper and lower side walls of the paper, and the flatness of the paper can be detected through the contact wheels 41; if the paper is wrinkled, the wrinkled part of the paper is likely to form a bulge or depression, and when it passes through the upper and lower groups of contact wheels 41, the wrinkled part of the paper will support the contact wheel 41 and drive the displacement block 43 to retract into the accommodating groove 42. At this time, the displacement block 43 drives the contact pad 49 to contact the electrode sheet 48, and the contact between the electrode sheet 48 and the contact pad 49 can be A signal is transmitted to the controller 51, and the controller 51 cooperates with the screening device 6 to send the wrinkled paper out of the supporting block 2 and will not send it into the printing press, so as to prevent the wrinkled paper from affecting the printing effect; thereby, the flatness of the paper sent into the printing press can be inductively detected in advance through the cooperation between the contact wheel 41, the displacement block 43, the electrode sheet 48 and the contact pad 49, to ensure that the printed pattern will not be defective due to the wrinkles of the paper; if the paper meets the flatness standard, the paper will not push out the contact wheel 41, and the paper can be sent into the printing press through the driving wheel 3.

[0054] It should be noted that the elastic force applied by the supporting spring rod 45 to the displacement block 43 is only used for resetting the displacement block 43. Therefore, the elastic force is smaller than the reverse pushing force applied by the wrinkled paper to the displacement block 43 through the contact wheel 41, and thus will not affect the wrinkled paper pushing out the displacement block 43 and the normal cooperation between the electrode sheet 48 and the contact pad 49, thereby ensuring the sensing accuracy.

[0055] Reference Figure 4 and Figure 6As shown, in order to make the paper fed into the printing machine meet different flatness standards according to the printing requirements, the flatness detection requirements of the paper can also be adjusted in this embodiment. Based on this, in this embodiment, the adjustment unit 50 includes a pulley 501, and a plurality of pulleys 501 sleeved on the outside of the connecting rod 47 are rotatably installed on the side of the horizontal plate 46 away from the displacement block 43. The outer wall of the connecting rod 47 is provided with a transmission thread, and the connecting rod 47 cooperates with the inner wall of the pulley 501 through the transmission thread. A double-headed motor 502 is installed inside the support block 2, and the double-headed motor 502 is electrically connected to the controller 51. The outer walls of the output shafts on the upper and lower sides of the double-headed motor 502 are sleeved with transmission wheels 503, and belts 504 are sleeved between the upper and lower transmission wheels 503 and the multiple pulleys 501 on the upper and lower sides respectively.

[0056] Furthermore, in the present embodiment, a plurality of annularly distributed longitudinal grooves 505 are evenly formed on the outer wall of the connecting rod 47, a plurality of through holes for movably passing the connecting rod 47 are formed on the horizontal plate 46, and a plurality of fixed teeth 506 slidably docked in the longitudinal grooves 505 are installed on the inner wall of the through hole. The fixed teeth 506 can limit the rotation direction of the connecting rod 47 so that the connecting rod 47 cannot rotate, but the connecting rod 47 can move up and down, so when the pulley 501 rotates, it can drive the connecting rod 47 to move back and forth up and down.

[0057] During the specific implementation process, when it is necessary to adjust the flatness detection standard of the paper according to the printing requirements, the controller 51 is used to connect the double-headed motor 502 to the power supply and start it, and the double-headed motor 502 drives the transmission wheel 503 to rotate, and the transmission wheel 503 drives the multiple pulleys 501 linked with it to rotate synchronously through the belt 504. During the rotation of the pulley 501, the connecting rod 47 is driven to move up or down through the transmission thread, and the upper and lower connecting rods 47 move synchronously relative to each other or move synchronously opposite to each other, and the connecting rod 47 drives the electrode sheet 48 to move synchronously and the distance between the electrode sheet 48 and the contact pad 49 gradually increases or decreases; when the distance between the electrode sheet 48 and the contact pad 49 decreases, the sensitivity of the contact between the electrode sheet 48 and the contact pad 49 increases relatively, even if the bulge or depression generated by the wrinkled part of the paper is small, and the distance that the wrinkled part of the paper pushes the displacement block 43 out is relatively small, the electrode sheet 48 and the contact pad 49 will come into contact, and at this time it is used for inductive detection of the flatness of paper with higher printing requirements.

[0058] On the contrary, when the distance between the electrode sheet 48 and the contact pad 49 is increased, the wrinkled part of the paper needs to push the displacement block 43 out to a certain distance before the electrode sheet 48 and the contact pad 49 can come into contact. At this time, it is used to perform inductive detection of the flatness of paper with relatively low printing requirements; thus, it can be adaptively adjusted according to the printing requirements, which not only improves the detection accuracy, but also facilitates the operation and is suitable for a variety of different printing requirements.

[0059] It should be noted that the threaded combination between the connecting rod 47 and the pulley 501 provided in the present embodiment is a self-locking thread, that is, after the transmission wheel 503 drives the pulley 501 to rotate through the belt 504, the pulley 501 cannot rotate arbitrarily under the action of other external forces, and thus the distance and sensitivity between the electrode sheet 48 and the contact pad 49 will not change, thereby avoiding the distance between the electrode sheet 48 and the contact pad 49 from changing arbitrarily after adjustment and affecting the detection accuracy of the paper.

[0060] Reference Figure 2 and Figure 3 As shown, since friction occurs when the contact wheel 41 contacts the paper, resistance is formed on the transportation of the paper, so it is easy for the paper to be difficult to quickly feed into the printing machine. In order to avoid this problem, in the present embodiment, two transmission groups symmetrically distributed along the width direction of the accommodating groove 42 are installed inside the carrier block 2, each transmission group includes two supports 22 respectively installed on the upper and lower side walls of the paper inlet 21, and two linkage shafts 23 are symmetrically rotated along the width direction of the two supports 22 of each transmission group. The opposite sides are installed with two linkage shafts 23 symmetrically along the width direction, and the linkage shafts 23 on the two supports 22 away from the side of the paper feeding mechanism 1 are respectively connected to the two driving wheels 3 through belt transmission, and the two linkage shafts 23 on the same support 22 are connected through belt transmission, and the two linkage shafts 23 located on both sides of the accommodating groove 42 and close to each other are connected through belt transmission. The belt transmission connection can make multiple linkage shafts 23 rotate synchronously, and the upper driving wheel 3 drives the multiple linkage shafts 23 on the upper side to rotate synchronously, and the lower driving wheel 3 drives the multiple linkage shafts 23 on the lower side to rotate synchronously.

[0061] In the specific implementation process, when the driving wheel 3 conveys the paper, the driving wheel 3 drives the linkage shaft 23 to rotate, and the upper and lower groups of linkage shafts 23 can convey the paper to the side close to the paper feeding mechanism 1, and the multiple linkage shafts 23 on the side of the accommodating groove 42 away from the paper feeding mechanism 1 can apply a driving force to the paper, so that the paper passes between the upper and lower groups of contact wheels 41, so that the contact wheel 41 can detect the flatness of the paper; after the paper detection is completed, the linkage shaft 23 continues to convey the paper, so that the paper passes through the multiple contact wheels 41 and moves to the multiple linkage shafts 23 on the side of the accommodating groove 42 close to the paper feeding mechanism 1, and then the multiple linkage shafts 23 are used to extract the paper from between the multiple contact wheels 41 and continue to convey the paper, thereby ensuring that the paper has sufficient driving force during the detection process to prevent jamming and affect the paper feeding and printing efficiency; the two side walls in the length direction of the support 22 are provided with inclined surfaces, so that when the driving wheel 3 conveys the paper between the multiple linkage shafts 23, the inclined surface of the support 22 can guide the paper, so that the paper can move smoothly between the upper and lower groups of linkage shafts 23.

[0062] It should be noted that in order to facilitate the linkage shaft 23 to apply sufficient driving force to the paper, the upper and lower linkage shafts 23 of the same transmission group are abutted against each other, that is, when the paper passes through multiple linkage shafts 23, the linkage shaft 23 can be in close contact with the paper to increase the friction and driving force between the linkage shaft 23 and the paper; if there are wrinkles on the paper, the linkage shaft 23 can squeeze and smooth the wrinkled part during the paper conveying process, and can smooth wrinkles with smaller amplitudes, and use the smoothed paper for printing. By smoothing the paper, the paper can be fully utilized and resources can be further saved; if the wrinkles on the paper are large and the linkage shaft 23 cannot restore it to flatness, the paper can be detected and then sent out of the supporting block 2 in cooperation with the screening device 6.

[0063] Reference Figure 7 , Figure 8 and Fig. 9 As shown, in order to facilitate the screening of the paper whose flatness does not meet the printing standard, a corresponding screening device 6 is also provided in this embodiment. Specifically, the screening device 6 includes a guide tube 61 connected to the paper inlet 21, and a paper outlet 62 is provided inside the bearing block 2. The paper outlet 62 is located on the side close to the paper feeding mechanism 1, and the distance between the upper and lower side walls of the paper outlet 62 gradually decreases from the sides to the middle. Therefore, the side of the paper outlet 62 close to the receiving groove 42 gradually expands, and the linkage shaft 23 transports the detected paper to the side of the paper feeding mechanism 1 When the paper is guided and received through the paper outlet 62, a rotating shaft 63 is rotatably installed on the upper and lower side walls of the middle part of the paper outlet 62, and a guide cylinder 61 is rotatably connected between the two rotating shafts 63. A paper feeding port 64 and a paper discharge port 65 connected to the paper outlet 62 are respectively provided on the upper and lower sides of the inner side of the supporting block 2 close to the paper feeding mechanism 1. The paper feeding port 64 is connected to the paper feeding mechanism 1, and the side of the paper discharge port 65 away from the paper outlet 62 passes through the supporting block 2 and is connected to the outside. A control unit 66 is installed between the guide cylinder 61 and the supporting block 2.

[0064] It should be noted that in order to facilitate the guide cylinder 61 to convey qualified paper to the paper feeding port 64 and convey wrinkled paper to the paper discharge port 65, in this embodiment, the guide cylinder 61 is an elastic telescopic structure composed of multiple telescopic cylinders, and two rotating columns 67 are installed on the side of the guide cylinder 61 away from the rotating shaft 63 so as to rotate symmetrically up and down, and the two rotating columns 67 rotate to abut against the inner wall of the paper discharge port 62.

[0065] In actual use, the guide tube 61 itself has an elastic force that can extend it, so that the guide tube 61 drives the rotating column 67 to press against the inner wall of the paper outlet 62 in the initial state, and by controlling the guide tube 61 to rotate up and down, it can be connected with the paper feed port 64 or the paper discharge port 65, so as to facilitate the delivery of paper that meets the printing requirements through the paper feed port 64 to the paper feeding mechanism 1, or to discharge paper that does not meet the requirements through the paper discharge port 65 to the outside of the supporting block 2.

[0066] Reference Fig.10 , Fig.11 and Fig.12 As shown, in order to facilitate the cooperation with the contact wheel 41 to convey the paper that meets the printing requirements to the paper feeding mechanism 1, or to discharge the paper that does not meet the requirements, in this embodiment, the control unit 66 includes a linkage rod 661, and the linkage rods 661 are installed on the two side walls in the length direction of the guide cylinder 61. The linkage rod 661 is connected to one of the telescopic cylinders of the guide cylinder 61. A reciprocating slide groove 662 is provided inside the bearing block 2, and an auxiliary block 663 is slidably arranged inside the reciprocating slide groove 662. The auxiliary block 663 is provided with a connecting hole for the linkage rod 661 to slide through, and a vertical hole 664 for the linkage rod 661 to slide through is provided between the paper outlet 62 and the reciprocating slide groove 662. The vertical hole 664 facilitates the auxiliary block 663 to drive the linkage rod 661 to move up and down to avoid interference.

[0067] Furthermore, in this embodiment, two adjusting screws 665 are symmetrically rotated along the length direction on the auxiliary block 663, and the multiple adjusting screws 665 are connected by belt transmission to facilitate the synchronous rotation of the multiple adjusting screws 665. A positioning motor 666 connected to any one of the adjusting screws 665 is installed inside the supporting block 2, and the positioning motor 666 and the controller 51 are electrically connected.

[0068] In the specific implementation process, when the contact wheel 41 detects that the flatness of the paper does not meet the printing standard, the controller 51 receives the corresponding signal and controls the positioning motor 666 to start, the positioning motor 666 drives the adjusting screw 665 to rotate forward, the adjusting screw 665 drives the auxiliary block 663 to move downward, and the two auxiliary blocks 663 both drive the linkage rod 661 to move synchronously, so that the linkage rod 661 drives the guide tube 61 to rotate downward and communicate with the paper discharge port 65 (at Fig.10 As shown in the figure), the wrinkled paper passes through the guide tube 61 and the paper discharge port 65 in sequence and is discharged to the outside of the carrier block 2, so that the discharged paper can be collected and recycled.

[0069] If the contact wheel 41 detects that the flatness of the paper meets the printing standard, the controller 51 controls the positioning motor 666 to drive the adjusting screw 665 to reverse, and the adjusting screw 665 drives the auxiliary block 663 to move upward and controls the guide cylinder 61 to rotate upward, so that the guide cylinder 61 is connected with the paper feed port 64, so that the paper that meets the standard can be transported to the inside of the printing press through the paper feeding mechanism 1 for printing; thereby, the connection mode between the paper outlet 62 and the paper feed port 64 or the paper discharge port 65 can be adjusted according to the sensing detection result of the paper, and then the paper can be transported to the printing press for printing or discharged for recycling, so that the flatness of the paper transported to the printing press can be detected and the substandard paper can be screened out through the dual sensing method, thereby ensuring the printing effect.

[0070] In addition, the present invention also provides a green printing method based on dual induction, comprising the following steps:

[0071] S1: Paper placement: First, insert the paper required for printing into the paper inlet 21.

[0072] S2: Paper transport: Next, the control motor 32 is started, and the control motor 32 drives the driving wheel 3 connected to its output shaft to rotate, and the driving wheel 3 drives another driving wheel 3 to rotate in the opposite direction through the gear 31, so that the two driving wheels 3 rotate in opposite directions and transport the paper to the side close to the paper feeding mechanism 1.

[0073] S3: Paper detection: When the paper is conveyed between the upper and lower groups of contact wheels 41, multiple contact wheels 41 are pressed against the upper and lower side walls of the paper, and the flatness of the paper can be detected through the contact wheels 41; if the paper is wrinkled, the wrinkled part of the paper will support the contact wheel 41 and drive the displacement block 43 to retract into the accommodating groove 42, and the displacement block 43 drives the contact pad 49 to contact the electrode sheet 48, and the contact between the electrode sheet 48 and the contact pad 49 can transmit a signal to the controller 51, and the controller 51 cooperates with the screening device 6 to send the wrinkled paper out of the supporting block 2 and will not send it into the printing press, so as to avoid the wrinkled paper affecting the printing effect; if the paper meets the flatness standard, the paper will not push out the contact wheel 41, and the paper can be sent into the printing press through the driving wheel 3.

[0074] When it is necessary to adjust the flatness detection standard of the paper according to the printing requirements, the double-headed motor 502 is powered on and started through the controller 51, and the double-headed motor 502 drives the transmission wheel 503 to rotate, and the transmission wheel 503 drives multiple pulleys 501 linked with it to rotate synchronously through the belt 504, and the pulley 501 drives the connecting rod 47 to move up or down through the transmission thread, and the connecting rod 47 drives the electrode sheet 48 to move synchronously and gradually increase or decrease the distance between the electrode sheet 48 and the contact pad 49, thereby reducing or increasing the sensitivity of contact between the electrode sheet 48 and the contact pad 49, so that it can be adaptively adjusted according to the printing requirements, which can not only improve the detection accuracy, but also facilitate the operation and adapt to a variety of different printing requirements.

[0075] In addition, when the driving wheel 3 transports the paper, the driving wheel 3 drives the linkage shaft 23 to rotate, and the upper and lower sets of linkage shafts 23 can transport the paper to the side close to the paper feeding mechanism 1, so that the paper passes between the upper and lower sets of contact wheels 41, so that the contact wheels 41 can detect the flatness of the paper; after the paper detection is completed, the linkage shaft 23 continues to transport the paper, thereby ensuring that the paper has sufficient driving force during the detection process to prevent jamming and affect the paper feeding and printing efficiency.

[0076] S4: Paper screening: When the contact wheel 41 detects that the flatness of the paper does not meet the printing standard, the controller 51 receives the corresponding signal and controls the positioning motor 666 to start, the positioning motor 666 drives the adjusting screw 665 to rotate forward, the adjusting screw 665 drives the auxiliary block 663 to move downward, and the two auxiliary blocks 663 both drive the linkage rod 661 to move synchronously, so that the linkage rod 661 drives the guide tube 61 to rotate downward and connect with the paper discharge port 65, so that the wrinkled paper passes through the guide tube 61 and the paper discharge port 65 in turn and is discharged to the outside of the supporting block 2, so that the discharged paper can be collected and recycled.

[0077] If the contact wheel 41 detects that the flatness of the paper meets the printing standard, the controller 51 controls the positioning motor 666 to drive the adjusting screw 665 to reverse, and the adjusting screw 665 drives the auxiliary block 663 to move upward and controls the guide cylinder 61 to rotate upward, so that the guide cylinder 61 is connected to the paper feeding port 64, so that the paper that meets the standard can be transported to the inside of the printing press through the paper feeding mechanism 1 for printing processing; thus, the paper transported to the printing press can be tested for flatness and substandard paper can be screened out through dual sensing, thereby ensuring the printing effect.

[0078] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0079] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A green printing system based on dual induction, comprising a carrier block (2) connected to a paper feeding mechanism (1), the carrier block (2) being provided with a paper inlet (21) for inserting paper into the paper feeding mechanism (1), characterized in that: Two driving wheels (3) are installed inside the carrier block (2) so as to rotate symmetrically up and down along the paper feed port (21); a detection device (4) for detecting the flatness of paper is arranged inside the carrier block (2) at a side of the driving wheels (3) close to the paper feeding mechanism (1); the detection device (4) comprises contact wheels (41) abutting against the upper and lower sides of the paper; a screening device (6) for screening out uneven paper is installed inside the carrier block (2) at a side of the detection device (4) close to the paper feeding mechanism (1); the screening device (6) comprises a guide cylinder (61) connected to the paper feed port (21).

2. A green printing system based on dual induction according to claim 1, characterized in that: Two rotation grooves for accommodating driving wheels (3) are symmetrically formed inside the bearing block (2) along the paper inlet (21) in the upper and lower directions. The ends of the two driving wheels (3) are sleeved with mutually meshing gears (31). A control motor (32) connected to any one of the driving wheels (3) is installed on the side wall of the bearing block (2) through a motor seat.

3. The green printing system based on dual induction according to claim 1, characterized in that: The detection device (4) further comprises two receiving grooves (42) symmetrically arranged in the upper and lower parts of the paper inlet (21) and inside the carrier block (2); a plurality of displacement blocks (43) equidistantly distributed along the length direction are slidably arranged inside the receiving grooves (42); contact wheels (41) are rotatably mounted on opposite sides of the upper and lower groups of displacement blocks (43); Both side walls of the accommodating groove (42) in the width direction are provided with limit sliding grooves, and the side walls of the displacement block (43) are provided with two supporting ears (44) slidably docked in the limit sliding grooves, and a supporting spring rod (45) is installed between the supporting ears (44) and the inner wall of the limit sliding groove.

4. The green printing system based on dual induction according to claim 3 is characterized in that: A horizontal plate (46) is installed inside each of the accommodating grooves (42) on a side of the displacement block (43) away from the contact wheel (41); a plurality of connecting rods (47) corresponding to the positions of the displacement blocks (43) are rotatably installed on the horizontal plate (46); an electrode sheet (48) is installed on one end of the connecting rod (47) close to the displacement block (43); a contact pad (49) is provided on one side of the displacement block (43) close to the connecting rod (47); an adjustment unit (50) is installed between the connecting rod (47) and the bearing block (2); a controller (51) is provided inside the bearing block (2); and the controller (51) is electrically connected to the plurality of contact pads (49).

5. The green printing system based on dual induction according to claim 4 is characterized in that: The adjustment unit (50) comprises a pulley (501), and a plurality of pulleys (501) sleeved on the outside of a connecting rod (47) are rotatably installed on a side of the horizontal plate (46) away from the displacement block (43). The outer wall of the connecting rod (47) is provided with a transmission thread, and the connecting rod (47) cooperates with the inner wall of the pulley (501) through the transmission thread. A double-headed motor (502) is installed inside the bearing block (2), and the double-headed motor (502) is electrically connected to the controller (51). The outer walls of the output shafts on the upper and lower sides of the double-headed motor (502) are sleeved with transmission wheels (503), and belts (504) are sleeved between the upper and lower transmission wheels (503) and the plurality of pulleys (501) on the upper and lower sides, respectively.

6. The green printing system based on dual induction according to claim 4, characterized in that: The outer wall of the connecting rod (47) is evenly provided with a plurality of annularly distributed longitudinal grooves (505), the horizontal plate (46) is provided with a plurality of through holes for movably passing the connecting rod (47), and the inner wall of the through hole is provided with a plurality of fixed teeth (506) slidably docked in the longitudinal grooves (505).

7. The green printing system based on dual induction according to claim 3 is characterized in that: Two transmission groups are installed inside the bearing block (2) and are symmetrically distributed along the width direction of the containing groove (42). Each transmission group includes two supports (22) respectively installed on the upper and lower side walls of the paper feed port (21). Two linkage shafts (23) are installed on opposite sides of the two supports (22) of each transmission group so as to rotate symmetrically along the width direction. The linkage shafts (23) on the two supports (22) on the side away from the paper feeding mechanism (1) are respectively connected to the two driving wheels (3) through belt transmission.

8. The green printing system based on dual induction according to claim 1, characterized in that: The screening device (6) further comprises a paper outlet (62) provided inside the carrier block (2), the paper outlet (62) being located on a side close to the paper feeding mechanism (1), a rotating shaft (63) being rotatably mounted on both upper and lower side walls of the middle portion of the paper outlet (62), a guide cylinder (61) being rotatably connected between the two rotating shafts (63), a paper feeding port (64) and a paper discharge port (65) being respectively provided on upper and lower sides of a side close to the paper feeding mechanism (1) inside the carrier block (2), and a control unit (66) being installed between the guide cylinder (61) and the carrier block (2); The guide tube (61) is an elastic telescopic structure, and two rotating columns (67) are symmetrically mounted on the side of the guide tube (61) away from the rotating shaft (63) so as to rotate up and down, and the two rotating columns (67) are rotatably abutted against the inner wall of the paper outlet (62).

9. The green printing system based on dual induction according to claim 8, characterized in that: The control unit (66) comprises a linkage rod (661), and the linkage rods (661) are installed on both side walls in the length direction of the guide tube (61); a reciprocating slide groove (662) is provided inside the bearing block (2); an auxiliary block (663) is slidably provided inside the reciprocating slide groove (662); a connecting hole for the linkage rod (661) to slide through is provided on the auxiliary block (663); and a vertical hole (664) for the linkage rod (661) to slide through is provided between the paper outlet (62) and the reciprocating slide groove (662); Two adjusting screws (665) are symmetrically rotated along the length direction on the auxiliary block (663), and the multiple adjusting screws (665) are connected to each other through a belt drive. A positioning motor (666) connected to any one of the adjusting screws (665) is installed inside the bearing block (2), and the positioning motor (666) is electrically connected to the controller (51).

10. A green printing method based on dual induction, using a green printing system based on dual induction as claimed in any one of claims 1 to 9, characterized in that: The printing method comprises the following steps: S1: Paper placement: First, insert the paper required for printing into the paper inlet (21); S2: paper conveying: by controlling the two driving wheels (3) to rotate in opposite directions and conveying the paper to the side close to the paper conveying mechanism (1); S3: Paper detection: Detect the flatness of the paper through the detection device (4) to ensure that the flatness of the paper meets the printing standard; S4: Paper screening: The uneven paper is sent out from the carrier block (2) through the screening device (6) and recycled.

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