A printing paper conveying device

Abstract

The present invention discloses a printing paper conveying device, comprising: a bracket, comprising a first conveying plate and a second conveying plate spaced apart from each other, an inclined plate being provided at one end of the second conveying plate; a first driving rod for driving the movement of paper on the inclined plate and a second driving rod for driving the movement of paper on the second conveying plate being installed on the bracket, the second driving rod being connected to a driving mechanism for driving it to rotate around its own axis, the first driving rod and the second driving rod being connected in transmission; a flip plate, hinged with the inclined plate, for guiding the paper on the first conveying plate to the second conveying plate; a main rod, rotatably installed on the bracket around its own axis, the main rod being connected in transmission with the flip plate and connected with the second driving rod. A printing paper conveying device according to the present invention can realize orderly conveyance of paper, has an ingenious structure, can realize complex actions with only one driving device, and effectively reduces production costs.

Description

Technical Field

[0001] The invention relates to the technical field of paper production machinery and equipment, and in particular to a printing paper conveying device. Background Art

[0002] On the printing and binding line, after printing, the paper sheets enter the linkage line, and then need to be cut by slitting knives and vertical line knives according to the specifications, and then conveyed to the folding mechanism through the conveying device to complete the folding, so that the book looks neat and beautiful. Most of the current conveying mechanisms have the problems of simple structure and limited functions, and complex structure with too many driving devices and high failure rate. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a printing paper conveying device, which can realize orderly conveying of paper, has an ingenious structure, can realize complex actions with only one driving device, and effectively reduces production costs.

[0004] A printing paper conveying device according to an embodiment of the present invention comprises: a bracket, comprising a first conveying plate and a second conveying plate spaced apart in an upper and lower manner, an inclined plate being provided at one end of the second conveying plate; the bracket is provided with a first driving rod for driving the movement of paper on the inclined plate and a second driving rod for driving the movement of paper on the second conveying plate, the second driving rod is connected to a driving mechanism for driving it to rotate around its own axis, and the first driving rod and the second driving rod are connected in transmission; a flip plate is hinged to the inclined plate and is used to guide the paper on the first conveying plate to the second conveying plate; a main rod is rotatably mounted on the bracket around its own axis, the main rod is connected in transmission to the flip plate and is connected to the second driving rod; the rotation of the second driving rod can drive the first driving rod to rotate, and can drive the main rod to rotate reciprocatingly, and the rotation of the main rod can drive the flip plate to rotate around the hinge with the inclined plate.

[0005] A printing paper conveying device according to an embodiment of the present invention has at least the following technical effects: the structure is ingenious, and the first conveying plate and the second conveying plate are arranged on the bracket at intervals, so that the interval between the papers on the first conveying plate can be reduced by increasing the number of the second conveying plates, thereby increasing the conveying efficiency; the main rod, the flip plate and the first driving rod are all driven by the driving device, which realizes efficient operation while reducing energy consumption and reducing production costs.

[0006] According to some embodiments of the present invention, the flip plate is provided with a guide rod, which is rotatably installed on the bracket around its own axis, and the guide rod is transmission-connected to the main rod; the rotation of the main rod can drive the guide rod to rotate, and then drive the flip plate to rotate around the hinge with the inclined plate.

[0007] According to some embodiments of the present invention, a first runner cooperating with the first drive rod and a second runner cooperating with the second drive rod are mounted on the main rod. When the main rod rotates, it can drive the first runner to rotate around the main rod to contact or separate from the first drive rod, and drive the second runner to rotate around the main rod to contact or separate from the second drive rod simultaneously.

[0008] According to some embodiments of the present invention, the first drive rod is provided with a first convex ring protruding radially, the second drive rod is provided with a second convex ring protruding radially, the inclined plate is provided with a first mounting hole for the first convex ring to pass through, and the second transfer plate is provided with a second mounting hole for the second convex ring to pass through; the first runner can contact the first convex ring, and the second runner can contact the second convex ring.

[0009] According to some embodiments of the present invention, the main rod is connected to the second drive rod through an intermediate structure.

[0010] According to some embodiments of the present invention, the intermediate structure includes a top rod and a transmission member. The transmission member is movably mounted on the bracket and is in transmission connection with the second drive rod; one end of the top rod is hinged to the main rod, and the other end abuts against the transmission member.

[0011] According to some embodiments of the present invention, the transmission member includes a transmission gear and a cam arranged coaxially. The transmission gear is in transmission connection with the second drive rod, and the end of the top rod away from the main rod abuts against the outer peripheral wall of the cam.

[0012] According to some embodiments of the present invention, a roller is provided at the end of the top rod away from the main rod, and the roller abuts against the outer peripheral wall of the cam; a tensioning structure is provided between the roller and the cam for making the roller closely adhere to the cam.

[0013] According to some embodiments of the present invention, an eccentric pin shaft is eccentrically provided at one end of the main rod, a connecting rod is sleeved on the eccentric pin shaft, and two ends of the connecting rod are respectively hinged to the main rod and the end of the top rod away from the transmission member.

[0014] According to some embodiments of the present invention, the bracket is provided with a mounting seat, the mounting seat is provided with a sliding groove, and the top rod is slidably mounted in the sliding groove.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 It is a schematic diagram of the installation structure of an embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of the structural decomposition of an embodiment of the present invention;

[0019] Figure 3 It is a side view of an embodiment of the present invention;

[0020] Figure 4 is Figure 2 an enlarged view of part A in

[0021] Reference numerals:

[0022] Bracket 100, first transfer plate 110, strip hole 111, second transfer plate 120, second mounting hole 121, inclined plate 130, first mounting hole 131, first driving rod 140, first convex ring 141, second driving rod 150, second convex ring 151, side plate 160, motor 161, mounting seat 170, sliding groove 171;

[0023] Flip plate 200, guide rod 210, avoidance groove 220;

[0024] Main rod 300, first mounting plate 310, first runner 311, second mounting plate 320, second runner 321, eccentric pin shaft 330;

[0025] Intermediate structure 400, ejector rod 410, roller 411, transmission member 420, transmission gear 421, cam 422, connecting rod 430, tension spring 440;

[0026] Drive belt 500, positioning member 510. Detailed implementation manners

[0027] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0028] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Referring to Figures 1 to 4 , a printing paper conveying device according to an embodiment of the present invention includes: a bracket 100, which includes a first conveying plate 110 and a second conveying plate 120 arranged at intervals up and down, and an inclined plate 130 is provided at one end of the second conveying plate 120. As Figure 1 , Figure 2 shown, the bracket 100 further includes two side plates 160. The first conveying plate 110 and the second conveying plate 120 are arranged at intervals up and down between the two side plates 160. Both sides of the first conveying plate 110 are fixedly connected to the two side plates 160 respectively, and both sides of the second conveying plate 120 are also fixedly connected to the two side plates 160 in the same way.

[0031] A conveyor belt 500 is also installed on the bracket 100. The conveyor belt 500 is arranged below the first conveyor plate 110. Two strip-shaped holes 111 extending along the conveying direction of the conveyor belt 500 are arranged at intervals on the first conveyor plate 110. Positioning members 510 extending upward are provided on the surface of the conveyor belt 500. The positioning members 510 pass through the positioning holes and extend upward out of the surface of the first conveyor plate 110. Two columns of positioning members 510 are provided corresponding to the two strip-shaped holes 111. Each column of positioning members 510 includes a plurality of positioning members 510. The plurality of positioning members 510 in the same column are arranged at intervals along the conveying direction of the conveyor belt 500, and the interval between two adjacent positioning members 510 in the same column should be greater than the length of the paper in the conveying direction of the conveyor belt 500. When conveying the paper, the positioning members 510 will contact one end of the paper and drive the paper to move along the conveying direction of the conveyor belt 500.

[0032] It can be imagined that by arranging a plurality of second conveyor plates 120 at intervals in the conveying direction of the conveyor belt 500, and the plurality of second conveyor plates 120 are arranged at intervals, the density of the paper on the first conveyor plate 110 can be increased, and then the paper can be guided to different second conveyor plates 120 at intervals by the plurality of second conveyor plates 120, thereby improving the conveying efficiency.

[0033] In some specific embodiments of the present invention, the inclined plate 130 is hinged to one end of the second conveyor plate 120.

[0034] The bracket 100 is provided with a first driving rod 140 for driving the paper on the inclined plate 130 to move and a second driving rod 150 for driving the paper on the second conveyor plate 120 to move. The second driving rod 150 is connected with a driving mechanism for driving it to rotate around its own axis. The first driving rod 140 and the second driving rod 150 are in transmission connection. Specifically, as Figure 2 shown, both ends of the first driving rod 140 are rotatably installed on two side plates 160 around their own axes respectively. Both ends of the second driving rod 150 are also rotatably installed on two side plates 160 around their own axes respectively. And both the first driving rod 140 and the second driving rod 150 are arranged above the first conveyor plate 110. The first driving rod 140 is arranged below the inclined plate 130, and the second driving rod 150 is arranged below the second conveyor plate 120.

[0035] As Figure 2 shown, one end of the first driving rod 140 is in transmission connection with one end of the second driving rod 150 through a belt. The driving mechanism for driving the second driving rod 150 to rotate is a motor 161. The motor 161 is installed on the side plate 160 and is in transmission connection with one end of the second driving rod 150.

[0036] It should be noted that the rotation directions of the second drive rod 150 and the first drive rod 140 must be consistent, that is, if the second drive rod 150 rotates clockwise, the first drive rod 140 should also rotate clockwise, and the rotation direction of the second drive rod 150 should be consistent with the paper conveying direction.

[0037] It is conceivable that the connection method between the first drive rod 140 and the second drive rod 150 can be various, such as chain drive or belt drive, etc.; the connection method between the motor 161 and the second drive rod 150 can also be various, such as gear meshing or belt or chain drive, etc., and the gear meshing method is used in the accompanying drawings.

[0038] The flip plate 200 is hinged to the inclined plate 130 and is used to guide the paper on the first conveying plate 110 to the second conveying plate 120; the flip plate 200 is hinged to the end of the inclined plate 130 away from the second conveying plate 120, and the end of the flip plate 200 away from the inclined plate 130 can contact the surface of the first conveying plate 110 to guide the paper to slide obliquely upward along the flip plate 200 to the second conveying plate 120.

[0039] It can be imagined that when one end of the flip plate 200 contacts the upper surface of the first conveying plate 110, in order to avoid obstructing the movement of the positioning member 510, an avoidance groove 220 for the positioning member 510 to pass through is provided at the end of the flip plate 200 away from the inclined plate 130; two avoidance grooves 220 are provided corresponding to the two strip holes 111.

[0040] The main rod 300 is rotatably mounted on the bracket 100 around its own axis. The main rod 300 is connected to the flip plate 200 and is connected to the second drive rod 150. The rotation of the second drive rod 150 can drive the first drive rod 140 to rotate and can drive the main rod 300 to reciprocate. The rotation of the main rod 300 can drive the flip plate 200 to rotate around the hinge with the inclined plate 130. Figure 2 As shown, one end of the second driving rod 150 is connected to the first driving rod 140 and the motor 161 , and the other end is connected to the main rod 300 , and the main rod 300 is connected to the flip plate 200 , so that all structures are driven by the same motor 161 .

[0041] The conveying device according to the embodiment of the present invention has an ingenious structure. By arranging the first conveying plate 110 and the second conveying plate 120 at intervals on the bracket 100, the interval between the papers on the first conveying plate 110 can be reduced by increasing the number of the second conveying plates 120, thereby increasing the conveying efficiency. The main rod 300, the flip plate 200 and the first driving rod 140 are all driven by the driving device, thereby achieving efficient operation while reducing energy consumption and reducing production costs.

[0042] In some embodiments of the present invention, the flip plate 200 is provided with a guide rod 210. The guide rod 210 is rotatably mounted on the bracket 100 about its own axis, and the guide rod 210 is in transmission connection with the main rod 300. When the main rod 300 rotates, it can drive the guide rod 210 to rotate, and further drive the flip plate 200 to rotate around the hinge point with the inclined plate 130. Specifically, as Figure 1 , Figure 2 shown, the guide rod 210 is fixedly connected to the lower surface of the flip plate 200, and both ends of the guide rod 210 are rotatably mounted on two side plates 160 about their own axes. One end of the guide rod 210 is in transmission connection with the main rod 300, Figure 2 and in it is in transmission connection through a belt or a chain. Of course, it can also be in transmission connection by means of gear meshing.

[0043] It should be noted that the rotation direction of the guide rod 210 should be the same as that of the main rod 300, that is, when the main rod 300 rotates clockwise, the guide rod 210 should also rotate clockwise under the drive of the main rod 300.

[0044] In some embodiments of the present invention, the main rod 300 is provided with a first runner 311 that cooperates with the first drive rod 140 and a second runner 321 that cooperates with the second drive rod 150. When the main rod 300 rotates, it can drive the first runner 311 to rotate around the main rod 300 to contact or separate from the first drive rod 140, and drive the second runner 321 to rotate around the main rod 300 to contact or separate from the second drive rod 150 at the same time. Specifically, two first mounting plates 310 are spaced apart on the main rod 300. One end of the first mounting plate 310 is sleeved on the main rod 300 and is in transmission connection with the main rod 300, such as key connection; the first runner 311 is mounted at the end of the first mounting plate 310. Two second mounting plates 320 are spaced apart between the two first mounting plates 310. One end of the second mounting plate 320 is also sleeved on the main rod 300 and is in transmission connection with the main rod 300, such as key connection; the second runner 321 is mounted at the end of the second mounting plate 320.

[0045] It should be noted that the first mounting plate 310 and the second mounting plate 320 extend in opposite directions. When the main rod 300 rotates to make the first runner 311 contact the first drive rod 140, the second runner 321 is separated from the second drive rod 150, and vice versa.

[0046] Further, when the main rod 300 rotates to drive the guide rod 210 to rotate, and the end of the turning plate 200 away from the inclined plate 130 is placed on the first transfer plate 110, at this time, the rotation of the main rod 300 should drive the first runner 311 to contact the first driving rod 140 simultaneously. When the turning plate 200 completely guides a piece of paper to separate from the first transfer plate 110, the main rod 300 rotates to drive the guide rod 210 to rotate, so that the turning plate 200 separates from the contact with the first transfer plate 110, and at the same time drives the second roller 411 to contact the second driving rod 150.

[0047] In some embodiments of the present invention, the first driving rod 140 is provided with a radially protruding first convex ring 141, the second driving rod 150 is provided with a radially protruding second convex ring 151, the inclined plate 130 is provided with a first mounting hole 131 for the first convex ring 141 to pass through, and the second transfer plate 120 is provided with a second mounting hole 121 for the second convex ring 151 to pass through; the first runner 311 can contact the first convex ring 141, and the second runner 321 can contact the second convex ring 151. Specifically, as Figure 2 , Figure 4 shown, two first convex rings 141 are spaced apart corresponding to two first mounting holes 131, and two second convex rings 151 are spaced apart corresponding to two second mounting holes 121.

[0048] In some embodiments of the present invention, the main rod 300 is connected to the second driving rod 150 through an intermediate structure 400.

[0049] In some embodiments of the present invention, the intermediate structure 400 includes a top rod 410 and a transmission member 420. The transmission member 420 is movably installed on the bracket 100 and is in transmission connection with the second driving rod 150; one end of the top rod 410 is hinged to the main rod 300, and the other end abuts against the transmission member 420. Specifically, as Figures 1 to 3 shown, the transmission member 420 is rotatably installed on the side plate 160 around its own axis and is in transmission connection with the end of the second driving rod 150 away from the motor 161.

[0050] In some embodiments of the present invention, the transmission member 420 includes a transmission gear 421 and a cam 422 arranged coaxially. The transmission gear 421 is in transmission connection with the second driving rod 150, and the end of the top rod 410 away from the main rod 300 abuts against the outer peripheral wall of the cam 422. Specifically, there is a gap between the transmission gear 421 and the cam 422, but they are connected by the same central axis, so that the rotation speeds of the gear and the cam 422 are the same. A gear is sleeved on the end of the second driving rod 150 away from the motor 161 and meshes with the transmission gear 421.

[0051] It should be noted that since the rotational speed of the second driving rod 150 is relatively fast and the rotation interval of the main rod 300 is relatively small, the pitch circle diameter of the transmission gear 421 is larger than the pitch circle diameter of the gear sleeved on the second driving rod 150 at the end far from the motor 161, thereby achieving the deceleration of the rotation of the main rod 300.

[0052] In some embodiments of the present invention, a roller 411 is provided at one end of the ejector rod 410 far from the main rod 300, and the roller 411 abuts against the outer peripheral wall of the cam 422; a tensioning structure for making the roller 411 tightly attached to the cam 422 is provided between the roller 411 and the cam 422. Specifically, the outer peripheral wall of the roller 411 and the outer peripheral wall of the cam 422 should always be in contact. The tensioning structure is a tensioning spring 440. As Figure 3 shown, the two ends of the tensioning spring 440 are respectively connected to the central position of the roller 411 and the central position of the transmission member 420. The tensioning spring 440 is always in a stretched state, thereby realizing that the roller 411 is always tightly attached to the outer peripheral wall of the cam 422.

[0053] The ejector rod 410 is provided with a first pin shaft for one end of the tensioning spring 440 to be sleeved, and the first pin shaft is coaxially arranged with the roller 411; the central position of the transmission member 420 is provided with a second pin shaft for the tensioning spring 440 to be sleeved, and the second pin shaft is coaxially arranged with the transmission member 420.

[0054] In some embodiments of the present invention, an eccentric pin shaft 330 is eccentrically provided at one end of the main rod 300. The eccentric pin shaft 330 is sleeved with a connecting rod 430. The two ends of the connecting rod 430 are respectively hinged to the main rod 300 and the end of the ejector rod 410 far from the transmission member 420.

[0055] In some embodiments of the present invention, the bracket 100 is provided with a mounting seat 170. The mounting seat 170 is provided with a chute 171. The ejector rod 410 is slidably mounted in the chute 171. Specifically, as Figure 3 shown, only when the end of the connecting rod 430 far from the ejector rod 410 is eccentrically connected to the main rod 300 can the rotation of the main rod 300 be driven. The mounting seat 170 and the chute 171 are provided to limit the moving direction of the ejector rod 410, so as to ensure that the movement of the ejector rod 410 can drive the connecting rod 430 to act.

[0056] In some specific embodiments of the present invention, the cam 422 is an irregular circular block, which includes two oppositely arranged arc segments with different diameters and two transition segments. And since the ejector rod 410 is restricted within the chute 171, when the roller 411 of the ejector rod 410 rolls on the large-diameter arc segment of the cam 422, the end of the ejector rod 410 away from the roller 411 will approach the main rod 300; when the roller 411 of the ejector rod 410 rolls on the small-diameter arc segment of the cam 422, the end of the ejector rod 410 away from the roller 411 will move away from the main rod 300. When the end of the ejector rod 410 away from the roller 411 approaches the main rod 300, it will drive the connecting rod 430 to push the main rod 300 to rotate by a certain angle, and when the end of the ejector rod 410 away from the roller 411 moves away from the main rod 300, it will drive the connecting rod 430 to pull the main rod 300 to rotate back by the same angle, so as to realize the reciprocating rotation of the main rod 300, and at the same time drive the flipping plate 200 to act to be placed on or separated from the first transfer plate 110.

[0057] It can be imagined that the ejector rod 410 and the main rod 300 can also be connected in other ways. For example: the connecting rod 430 is not provided, and the eccentric pin shaft 330 is not provided at the end of the main rod 300. Instead, a small gear is provided at the central position of the end of the main rod 300, and the end of the ejector rod 410 away from the roller 411 is provided as a rack meshing with the small gear on the main rod 300. When the ejector rod 410 slides along the chute 171, it will drive the reciprocating rotation of the main rod 300 through the meshing transmission of the rack and the small gear, and the same technical effect can be achieved.

[0058] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0059] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A printing paper conveying device, characterized in that, Comprising: A bracket (100), including a first transfer plate (110) and a second transfer plate (120) arranged at an upper and lower interval, with an inclined plate (130) provided at one end of the second transfer plate (120); the bracket (100) is equipped with a first driving rod (140) for driving the movement of the paper on the inclined plate (130) and a second driving rod (150) for driving the movement of the paper on the second transfer plate (120), the second driving rod (150) is connected to a driving mechanism for driving it to rotate around its own axis, and the first driving rod (140) and the second driving rod (150) are in transmission connection; A turning plate (200), hinged to the inclined plate (130) and used to guide the paper on the first transfer plate (110) to the second transfer plate (120); the turning plate (200) is provided with a guide rod (210), and the guide rod (210) is rotatably installed on the bracket (100) around its own axis; A main rod (300), rotatably installed on the bracket (100) around its own axis, the main rod (300) is in transmission connection with the turning plate (200) and is connected to the second driving rod (150); the guide rod (210) is in transmission connection with the main rod (300), and the rotation of the main rod (300) can drive the rotation of the guide rod (210), thereby driving the turning plate (200) to rotate around the hinge point with the inclined plate (130); The rotation of the second driving rod (150) can drive the rotation of the first driving rod (140) and can drive the main rod (300) to reciprocate, and the rotation of the main rod (300) can drive the turning plate (200) to rotate around the hinge point with the inclined plate (130); the main rod (300) is installed with a first runner (311) cooperating with the first driving rod (140) and a second runner (321) cooperating with the second driving rod (150), and the rotation of the main rod (300) can simultaneously drive the first runner (311) to rotate around the main rod (300) to contact or separate from the first driving rod (140), and the second runner (321) to rotate around the main rod (300) to contact or separate from the second driving rod (150); Wherein, the main rod (300) is connected to the second driving rod (150) through an intermediate structure (400), the intermediate structure (400) includes a top rod (410) and a transmission member (420), the transmission member (420) is movably installed on the bracket (100) and is in transmission connection with the second driving rod (150); one end of the top rod (410) is hinged to the main rod (300), and the other end abuts against the transmission member (420); The transmission member (420) includes a transmission gear (421) and a cam (422) arranged coaxially. The transmission gear (421) is in transmission connection with the second driving rod (150). One end of the ejector rod (410) away from the main rod (300) abuts against the outer peripheral wall of the cam (422). A roller (411) is provided at one end of the ejector rod (410) away from the main rod (300), and the roller (411) abuts against the outer peripheral wall of the cam (422). A tensioning structure for making the roller (411) closely adhere to the cam (422) is provided between the roller (411) and the cam (422). An eccentric pin shaft (330) is eccentrically provided at one end of the main rod (300). A connecting rod (430) is sleeved on the eccentric pin shaft (330). Two ends of the connecting rod (430) are respectively hinged to the main rod (300) and one end of the ejector rod (410) away from the transmission member (420).

2. The printing paper conveying device according to claim 1, wherein: The first driving rod (140) is provided with a radially protruding first convex ring (141), the second driving rod (150) is provided with a radially protruding second convex ring (151), the inclined plate (130) is provided with a first mounting hole (131) for the first convex ring (141) to pass through, and the second transfer plate (120) is provided with a second mounting hole (121) for the second convex ring (151) to pass through. The first runner (311) can contact the first convex ring (141), and the second runner (321) can contact the second convex ring (151).

3. A printing paper conveying device according to claim 1, characterized in that: The bracket (100) is provided with a mounting seat (170), the mounting seat (170) is provided with a chute (171), and the ejector rod (410) is slidably mounted in the chute (171).

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