Roller-side automatic paper delivery device

Abstract

The present invention discloses a roller-side automatic paper delivery device, which is used at the rear side of a paper transfer cylinder for paper rolling processing. The roller-side automatic paper delivery device includes a front gauge paper stopper mechanism which is arranged at the paper outlet to prevent the paper from sliding out and can be pushed away, a lower swing paper delivery mechanism which is arranged at the lower side of the front gauge paper stopper mechanism and can clamp and take out the paper at the paper outlet so as to swing forward and pull out the paper and deliver it to the paper transfer cylinder, a conjugate cam transmission mechanism which drives the lower swing paper delivery mechanism to swing back and forth, and an opening cam mechanism which is installed on the rotating shaft of the paper transfer cylinder and controls the opening and closing action of the paper delivery gripper on the lower swing paper delivery mechanism. The opening cam mechanism controls the opening and closing action of the paper delivery gripper, first opens the paper delivery gripper before gripping the paper at the upper limit position, then bites the paper, and pushes away the front gauge paper stopper mechanism; the conjugate cam transmission mechanism controls the lower swing paper delivery mechanism to swing back and forth, so that the paper is dragged to the handover position, and the paper delivery gripper releases the paper, so that the printing process can smoothly feed the paper and is efficient.

Description

Technical Field

[0001] The invention relates to UV roller printing equipment, in particular to a roller side automatic paper delivery device. Background Art

[0002] When feeding paper, the existing roller printing equipment directly places the paper to be printed on one side of the paper transfer roller. There is no paging process and corresponding device. When the paper enters the printing equipment, it is easy to stack and jam the machine, and it is also easy to miss the page due to duplicate pages. The current roller printing equipment bites a piece of paper when the roller rolls one circle. The traditional auxiliary mechanism delivers paper slowly, and a larger gripper needs to be designed. In order to match the speed of paper feeding and ensure that the paper is bitten, the roller speed of the roller printing can only be set at a relatively slow speed for rolling. As a result, the current roller printing speed is generally low, which limits the improvement of the equipment's working efficiency, and thus limits the market competitiveness of the roller printing equipment. Summary of the invention

[0003] In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a roller-side automatic paper delivery device that enables smooth and efficient paper delivery during the printing process.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a roller-side automatic paper feeding device, used on the rear side of the paper transfer cylinder for paper rolling processing, the roller-side automatic paper feeding device includes a front rule paper stop mechanism arranged at the paper outlet to prevent the paper from sliding out and can be pushed away, a lower swing paper feeding mechanism arranged on the lower side of the front rule paper stop mechanism and can clamp the paper at the paper outlet and swing forward to pull the paper out and pass it to the paper transfer cylinder, a conjugate cam transmission mechanism that drives the lower swing paper feeding mechanism to swing back and forth, and an opening cam mechanism installed on the rotating shaft of the paper transfer cylinder and controlling the opening and closing action of the paper feeding teeth on the lower swing paper feeding mechanism; the conjugate cam transmission mechanism, the opening cam mechanism and the paper transfer cylinder are installed on the same rotating shaft and are synchronously driven by the rotating shaft.

[0005] As an improvement on the technical solution of the roller-side automatic paper delivery device of the present invention, the conjugate cam transmission mechanism includes a conjugate forward cam and a conjugate return cam synchronously installed on the rotating shaft of the paper transfer roller, a forward swing arm hingedly installed on the frame and pushed by the conjugate forward cam to swing a certain angle, a return swing arm hingedly installed on the frame and pushed by the conjugate return cam to swing a certain angle, a swing connecting arm synchronously installed on the swing seat or swing shaft of the swing paper delivery mechanism and having a front arm and a rear arm, a forward push rod whose two ends are respectively hinged to the forward swing arm and the front arm to drive the swing paper delivery mechanism to swing forward, and a return push rod whose two ends are respectively connected to the return swing arm and the rear arm to drive the swing paper delivery mechanism to swing backward.

[0006] As an improvement on the technical solution of the roller-side automatic paper delivery device of the present invention, the conjugate forward cam maintains a certain angle in the minimum curvature radius section, and the conjugate return cam maintains a certain angle in the maximum curvature radius section, so that the limit angle of the downward swing of the paper delivery mechanism is that the paper delivery gripper swings up to the paper outlet and maintains it for a certain time.

[0007] As an improvement on the technical solution of the roller-side automatic paper delivery device of the present invention, the conjugate forward cam has a minimum curvature radius of 100 mm and maintains an angle greater than 22.5°, and the conjugate return cam has a maximum curvature radius of 215 mm and maintains an angle greater than 45°.

[0008] As an improvement of the technical solution of the roller-side automatic paper delivery device of the present invention, the upper end of the return push rod is hinged to the return swing arm, and the return push rod is elastically connected to the rear arm.

[0009] As an improvement of the technical solution of the roller-side automatic paper delivery device of the present invention, the return push rod sleeve is provided with a sliding sleeve hinged to the rear arm, and the return push rod sleeve is provided with a compression spring with one end pushing the sliding sleeve.

[0010] As an improvement on the technical solution of the roller-side automatic paper feeding device of the present invention, the tooth-opening cam mechanism includes a driving swing cam synchronously installed on the rotating shaft of the paper transfer roller, an opening tooth swing arm hinged to the frame and pushed by the driving swing cam to swing a certain angle, a lower swing opening cam hinged to the swing shaft of the lower swing paper feeding mechanism, an opening tooth push rod whose two ends are respectively hinged to the tooth-opening swing arm and the lower swing opening cam to drive the lower swing opening cam to swing, and a return spring whose one end pushes to drive the lower swing opening cam to swing in the opposite direction, the lower swing paper feeding mechanism is hingedly installed with a gripping support arm, the paper feeding gripper is installed on the gripping support arm, one end of the gripping support arm is pressed against the outer edge surface of the lower swing opening cam, and the lower swing paper feeding mechanism is provided with a return spring with one end pressing against the other end of the gripping support arm.

[0011] As an improvement on the technical solution of the roller-side automatic paper delivery device of the present invention, the lower swing opening cam is fan-shaped, the middle part of its outer edge surface radially sinks and the two ends are raised to form an opening boss; the maximum curvature radius of the driving swing cam starts after the paper delivery gripper reaches the paper outlet and ends after the paper delivery gripper pulls the paper to the paper transfer roller for delivery and releases it.

[0012] As an improvement on the technical solution of the roller-side automatic paper delivery device of the present invention, when the rear side of the lower swing opening cam retreats, it pushes the front gauge paper stop mechanism to make it swing to a certain angle to release the paper.

[0013] As an improvement on the technical solution of the roller-side automatic paper feeding device of the present invention, before the paper feeding gripper swings up into position, the opening boss on the upper part of the lower opening cam pushes the opening swing arm so that the paper feeding gripper is opened; the lower opening cam continues to swing upward and backward, releasing the opening swing arm so that the paper feeding gripper is closed to bite the paper; when the paper feeding gripper swings down to the junction position, the opening boss on the lower part of the lower opening cam pushes the opening swing arm so that the paper feeding gripper is opened to release the paper; the maximum curvature radius section of the swing driving cam is maintained at at least 135°.

[0014] The beneficial effects of the present invention are as follows: the opening cam mechanism of the roller-side automatic paper feeding device controls the opening and closing action of the paper feeding gripper, and the paper feeding gripper is first opened before gripping the paper at the upper limit position, and then the paper feeding gripper stops and the cam swings upward so that the gripper bites the paper, and the cam swings upward to push the front gauge paper blocking mechanism to release the blockage; the conjugate cam transmission mechanism controls the swing-down paper feeding mechanism to swing back and forth, so that the paper feeding gripper swings downward to pull the paper forward and drag it to the intersection position with the paper transfer roller, and the opening cam mechanism controls the paper feeding gripper to loosen and release the paper and be taken away by the paper transfer roller. The swing-down paper feeding mechanism can grip the paper in the forward direction and quickly pull and deliver it to the paper transfer roller, and can also maintain a high speed when cutting into the paper transfer roller, thereby improving the running speed of the roller printing and improving its printing efficiency, thereby making the printing process smooth and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the external side perspective structure of a roller printing device in which a roller-side automatic paper delivery device of the present invention is located and a partial enlarged diagram thereof, showing a conjugate cam transmission structure.

[0016] Figure 2 It is a schematic diagram of the internal side perspective structure of a roller printing device in which a roller-side automatic paper delivery device of the present invention is located and a partial enlarged diagram thereof, showing the tooth-opening cam transmission structure.

[0017] Figure 3 It is a schematic diagram of the forward partial cross-section structure of the roller-side automatic paper delivery device.

[0018] Figure 4 for Figure 3 The schematic diagram of the local structure in the middle A direction shows the opening cam transmission structure.

[0019] Figure 5 for Figure 3 The schematic diagram of the local structure in the middle B direction shows the conjugate cam transmission structure.

[0020] Figure 6 This is a schematic diagram of the outer contour of the conjugate forward cam.

[0021] Figure 7 It is a schematic diagram of the partial structure of the downward paper delivery mechanism.

[0022] Figure 8 for Figure 1 A partial first three-dimensional structural schematic diagram of the rolling printing device is shown.

[0023] Fig. 9 for Figure 8 A schematic diagram of the partial lateral structure of the roller printing equipment is shown.

[0024] Fig.10 for Figure 1 A partial second stereoscopic structural schematic diagram of the rolling printing device is shown.

[0025] Fig.11 for Fig.10 A schematic diagram of the partial lateral structure of the roller printing equipment is shown. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] like Figure 1 to Figure 6 , Figure 8 As shown, a roller-side automatic paper delivery device of the present invention is used on the rear side of a paper transfer cylinder 11 for paper rolling processing, the front side of the paper transfer cylinder 11 is cooperated with an impression cylinder 99, and the upper side of the impression cylinder 99 is cooperated with a printing plate cylinder 96, the roller-side automatic paper delivery device comprises a front gauge paper stopper mechanism 15 which is arranged at the paper outlet to prevent the paper from sliding out and can be pushed away, a lower swing paper delivery mechanism 16 which is arranged at the lower side of the front gauge paper stopper mechanism 15 and can clamp and take out the paper at the paper outlet so as to swing forward to pull out the paper and deliver it to the paper transfer cylinder 11, a conjugate cam transmission mechanism which drives the lower swing paper delivery mechanism 16 to swing back and forth, and an opening cam mechanism 18 which is installed on the rotating shaft of the paper transfer cylinder 11 and controls the opening and closing action of the paper delivery gripper 19 on the lower swing paper delivery mechanism 16. The opening cam mechanism 18 of the roller-side automatic paper delivery device controls the opening and closing action of the paper delivery gripper 19. Before gripping the paper at the upper limit position, the paper delivery gripper 19 is first opened, and then the paper delivery gripper 19 stops and the cam swings upward so that the gripper bites the paper. The cam swings upward and pushes the front gauge paper stop mechanism 15 to remove the blockage; the conjugate cam transmission mechanism controls the swing-down paper delivery mechanism 16 to swing back and forth, so that the paper delivery gripper 19 swings downward to pull the paper forward and drag it to the intersection with the paper transfer cylinder 11. The opening cam mechanism 18 controls the paper delivery gripper 19 to loosen and release the paper and the paper is taken away by the paper transfer cylinder 11. The swing-down paper delivery mechanism can grip the paper in the forward direction and quickly pull and deliver it to the paper transfer cylinder. It can also maintain a high speed when cutting into the paper transfer cylinder, thereby increasing the running speed of the roller printing and improving its printing efficiency, thereby making the printing process smooth and efficient. The conjugate cam transmission mechanism, the opening cam mechanism 18 and the paper transfer roller 11 are installed on the same rotating shaft and are synchronously driven by the rotating shaft, that is, these mechanisms are driven by the same power to ensure the synchronization of the operation of the three and the accuracy of the coordination between the three.

[0028] Among them, combined Figure 8 to Figure 11 As shown, the conjugate cam transmission mechanism includes a conjugate forward cam 21 and a conjugate return cam 31 synchronously installed on the rotating shaft of the paper transfer roller 11, a forward swing arm 22 hingedly installed on the frame 10 and pushed by the conjugate forward cam 21 to swing a certain angle, a return swing arm 32 hingedly installed on the frame and pushed by the conjugate return cam 31 to swing a certain angle, a swing connecting arm 66 synchronously installed on the swing seat 62 or the swing shaft 61 of the swing paper delivery mechanism 16 and having a front arm 26 and a rear arm 36, a forward push rod 23 whose two ends are respectively hinged to the forward swing arm 22 and the front arm 26 to drive the swing paper delivery mechanism to swing forward, and a return push rod 33 whose two ends are respectively connected to the return swing arm 32 and the rear arm 36 to drive the swing paper delivery mechanism to swing backward. During the operation of the paper transfer cylinder 11, the conjugate forward cam 21 and the conjugate return cam 31 rotate synchronously with the paper transfer cylinder 11, driven by the same power, and drive the front arm 26 and the rear arm 36 to swing synchronously back and forth along the common axis through the corresponding forward swing arm 22, the return swing arm 32 and the corresponding forward push rod 23, the return push rod 33, and control their swing angles, thereby driving the swing-down paper delivery mechanism 16 to swing within a certain angle range, and the paper delivery gripper 19 also swings synchronously back and forth to drag the paper forward and swing back to reset, realizing a cyclic reciprocating action. When the paper transfer cylinder 11 rotates one circle, the swing-down paper delivery mechanism 16 and the paper delivery gripper 19 swing back and forth once, so that the paper delivery gripper 19 is synchronized with the cycle of the paper transfer cylinder 11, so that the paper biting position of the paper delivery gripper 19 and the paper handover position are always kept at the same position. The forward swing arm 22 is hingedly provided with a roller to contact with the conjugate forward cam 21 to realize dynamic transmission; the return swing arm 32 is hingedly provided with a roller to contact with the conjugate return cam 31 to realize dynamic transmission.

[0029] Furthermore, the conjugate forward cam 21 maintains a certain angle in the minimum curvature radius section N, and the conjugate return cam 31 maintains a certain angle in the maximum curvature radius section M. The conjugate return cam 31 pushes up the swing paper delivery mechanism 16 so that the swing paper delivery mechanism 16 swings backward. The conjugate return cam 31 reaches the maximum curvature radius section so that the paper delivery gripper 19 swings up to the limit angle, that is, at the paper outlet. At this time, the conjugate forward cam 21 and the conjugate return cam 31 maintain the curvature radius unchanged so that the swing paper delivery mechanism 16 stays for a certain time. The maintenance time allows the paper delivery gripper 19 to have time to change its state from open to closed to clamp the paper, and the paper transfer cylinder 11 continues to operate without stopping.

[0030] Specifically, the conjugate forward cam 21 has a minimum curvature radius of 100 mm and maintains an angle greater than 22.5°, and the conjugate return cam 31 has a maximum curvature radius of 215 mm and maintains an angle greater than 45°, so that the paper delivery gripper 19 stays for a while at the paper-grabbing position. At this time, the opening cam mechanism 18 drives the paper delivery gripper 19 to close and bite the paper, thereby dragging the paper forward.

[0031] Furthermore, the upper end of the return push rod 33 is hinged with the return swing arm 32, and the return push rod 33 is elastically connected with the rear arm 36. The elastic connection drive can absorb the cam shape error of the conjugate cam transmission mechanism and the size error of the transmission structure, and can also buffer the thrust of the cam, so that the reverse impact force on the cam is reduced, avoiding the obstruction of the cam rotation, reducing the resistance fluctuation to the paper transfer roller 11, and making the synchronous rotation of the paper transfer roller 11 and the conjugate forward cam 21 and the conjugate return cam 31 smoother. During the return process, the opening and closing of the paper delivery gripper 19 does not affect the paper transfer, and the spring elastic mechanism is set in the return transmission assembly so as not to affect the paper transfer action.

[0032] More preferably, the return push rod 33 is provided with a sliding sleeve 38 hinged to the rear arm 36, and the return push rod 33 is provided with a compression spring 39 with one end pushing the sliding sleeve 38, thereby forming an elastic transmission structure with the return swing arm 32, so that the rotation of the conjugate return cam 31 can drive the rear arm 36 to swing.

[0033] Among them, combined Figure 7As shown, the tooth-opening cam mechanism 18 includes a driving swing cam 81 synchronously installed on the rotating shaft of the paper transfer roller 11, an opening tooth swing arm 82 hinged to the frame 10 and pushed by the driving swing cam 81 to swing a certain angle, a lower swing tooth-opening cam 86 hinged to the swing shaft 61 of the lower swing paper delivery mechanism 16, an opening tooth push rod 83 whose two ends are respectively hinged to the tooth-opening swing arm 82 and the lower swing tooth-opening cam 86 to drive the lower swing tooth-opening cam to swing, and a return spring 88 with one end pushing to drive the lower swing tooth-opening cam 86 to swing in the opposite direction. The lower swing paper delivery mechanism 16 is hingedly installed with a gripping support arm 69, and the paper delivery gripper 19 is installed on the gripping support arm 69, one end of the gripping support arm 69 is pressed against the outer edge surface of the lower swing tooth-opening cam 86, and the lower swing paper delivery mechanism 16 is provided with a return spring 68 with one end abutting against the other end of the gripping support arm 69. Among them, the middle part of the gripper arm 69 is hinged to the swing seat of the lower swing paper delivery mechanism 16, and the two ends of the gripper arm 69 are respectively a driven end and a reset end. The reset end is pushed by the return spring 68 so that the driven end is always close to the outer edge of the swingable lower swing opening cam 86, so that the gripper arm 69 is controlled by the lower swing opening cam 86 to rotate, and then the paper delivery gripper 19 installed on the gripper arm 69 produces an opening and closing action. In addition, the swing driving cam 81 and the paper transfer cylinder 11 are driven by the same power. The swing driving cam 81 drives the opening swing arm 82 to swing during the synchronous rotation of the paper transfer cylinder 11, and drives the lower swing opening cam 86 to swing to a certain amplitude through the opening push rod 83, so that the gripper arm 69 and the paper delivery gripper 19 can be controlled to change the pushing amplitude of the driven end when they stop at a certain position, and release the paper delivery gripper 19 to close it.

[0034] Furthermore, the lower swing-opening cam 86 is fan-shaped, with the middle part of its outer edge radially sunken and two ends raised to form an opening boss 89; the maximum curvature radius of the swing-driving cam 81 starts after the paper delivery gripper 19 reaches the paper outlet and ends after the paper delivery gripper 19 pulls the paper to the paper transfer roller 11 for delivery and release. The gripper arm 69 swings until the driven end moves to the opening boss 89 so that the driven end is supported and the paper delivering gripper 19 opens; the gripper arm 69 continues to swing so that the edge of the paper falls under the paper delivering gripper 19; at this time, the swing-drive cam 81 pushes the opening swing arm 82 so that it pulls up the lower swing opening cam 86 through the opening push rod 83 to swing it upward, so that the driven end of the gripper arm 69 falls into the middle sinking part of the lower swing opening cam 86, and then the paper delivering gripper 19 closes and bites the paper; then the driven end is maintained in the radial sinking section of the lower swing opening cam 86, and the driven end of the opening swing arm 82 also presses against the maximum curvature radius section of the swing-drive cam 81, so that the paper delivering gripper 19 always bites the paper. Until the paper delivery gripper 19 swings forward to the position of paper delivery, at this time, the driven end of the opening arm 82 swings to the lower opening boss 89 and is pushed to open the paper delivery gripper 19 to release the paper to complete the delivery, and then the paper delivery gripper 19 and the gripper support arm 69 continue to swing forward to leave the delivery position so as not to block the paper from continuing to move forward. Then the contraction part of the swing cam 81 releases the opening arm 82, and under the action of the reset spring 88, the lower opening cam 86 swings forward, so that the paper delivery gripper 19 returns to the paper outlet again, that is, before the highest position, to open, and the upper opening boss 89 pushes the driven end of the opening arm 82 to open the paper delivery gripper 19.

[0035] More preferably, when the rear side of the lower hem opening cam 86 retreats, that is, when the paper delivery gripper 19 closes and bites the paper, the lower hem opening cam 86 continues to swing until it pushes the front gauge paper stop mechanism 15 to swing to a certain angle to release the paper.

[0036] More preferably, before the paper delivering gripper 19 swings up to position, the opening boss 89 on the upper portion of the lower opening cam 86 pushes the gripper support arm 69 so that the paper delivering gripper 19 is opened; the lower opening cam 86 continues to swing upward and backward, releasing the gripper support arm 69 so that the paper delivering gripper 19 closes and bites the paper; when the paper delivering gripper 19 swings down to the connecting position, the opening boss 89 on the lower portion of the lower opening cam 86 pushes the gripper support arm 69 so that the paper delivering gripper 19 is opened and releases the paper; the maximum curvature radius section of the swing driving cam 81 is maintained at at least 135°. When the driving swing cam 81 is maintained in the maximum curvature radius section, the driven end of the opening swing arm 82 is in the sinking section between the opening bosses 89 (i.e., the occlusal diameter section of the opening cam 86), and when the driven end of the opening swing arm 82 climbs onto the opening boss 89, the driving swing cam 81 is still maintained in the maximum curvature radius section P, and can be maintained until the opening swing arm 82 swings down to the limit position and then returns to reset. Among them, the angular amplitude of the sinking section between the opening bosses 89 is greater than the swing angular amplitude of the paper delivery gripper 19 between the paper biting position and the paper handover position.

[0037] In summary, the paper transfer roller 11, the conjugate forward cam 21, the conjugate return cam 31, the swing drive cam 81, the lower swing opening cam 86, the gripping arm 69, the paper delivery gripping teeth 19, and the front gauge paper stop mechanism 15 are all driven by the same power and have the same action cycle. They cooperate with each other to increase the printing speed and improve the production efficiency of the printing equipment.

[0038] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A roller-side automatic paper delivery device, used on the rear side of a paper transfer cylinder in a paper rolling process, characterized in that: The invention comprises a front paper stopper mechanism which is arranged at the paper outlet to prevent the paper from sliding out and can be pushed away, a lower swing paper delivery mechanism which is arranged at the lower side of the front paper stopper mechanism and can clamp the paper at the paper outlet so as to swing forward to pull out the paper and deliver it to the paper transfer roller, a conjugate cam transmission mechanism which drives the lower swing paper delivery mechanism to swing back and forth, and an opening cam mechanism which is installed on the rotating shaft of the paper transfer roller and controls the opening and closing action of the paper delivery gripper on the lower swing paper delivery mechanism; the conjugate cam transmission mechanism, the opening cam mechanism and the paper transfer roller are installed on the same rotating shaft and are synchronously driven by the rotating shaft to operate; the opening cam mechanism comprises a rotating shaft which is synchronously installed on the paper transfer roller The driving cam of the axis, the tooth-opening swing arm hinged on the frame and pushed by the driving swing cam to swing a certain angle, the lower swing tooth-opening cam hinged to the swing axis of the lower swing paper feeding mechanism, the tooth-opening push rod whose two ends are respectively hinged to the tooth-opening swing arm and the lower swing tooth-opening cam to drive the lower swing tooth-opening cam to swing, and the return spring with one end pushing to drive the lower swing tooth-opening cam to swing in the opposite direction, the lower swing paper feeding mechanism is hingedly installed with a gripping support arm, the paper feeding gripper is installed on the gripping support arm, one end of the gripping support arm is pressed against the outer edge surface of the lower swing tooth-opening cam, and the lower swing paper feeding mechanism is provided with a return spring with one end abutting against the other end of the gripping support arm.

2. The roller-side automatic paper delivery device according to claim 1, characterized in that: The conjugate cam transmission mechanism includes a conjugate forward cam and a conjugate return cam synchronously installed on the rotating shaft of the paper transfer roller, a forward swing arm hingedly installed on the frame and pushed by the conjugate forward cam to swing a certain angle, a return swing arm hingedly installed on the frame and pushed by the conjugate return cam to swing a certain angle, a swing connecting arm synchronously installed on the swing seat or swing shaft of the swing paper delivery mechanism and having a front arm and a rear arm, a forward push rod whose two ends are respectively hinged to the forward swing arm and the front arm to drive the swing paper delivery mechanism to swing forward, and a return push rod whose two ends are respectively connected to the return swing arm and the rear arm to drive the swing paper delivery mechanism to swing backward.

3. The roller-side automatic paper delivery device according to claim 2, characterized in that: The conjugate forward cam maintains a certain angle in the minimum curvature radius section, and the conjugate return cam maintains a certain angle in the maximum curvature radius section, so that the limit angle of the downward swinging paper delivery mechanism is that the paper delivery gripper swings up to the paper outlet and maintains it for a certain time.

4. The roller-side automatic paper delivery device according to claim 3, characterized in that: The conjugate forward cam has a minimum curvature radius of 100 mm and maintains an angle greater than 22.5°, and the conjugate return cam has a maximum curvature radius of 215 mm and maintains an angle greater than 45°.

5. The roller-side automatic paper delivery device according to claim 2, characterized in that: The upper end of the return push rod is hinged with the return swing arm, and the return push rod is elastically pushed and connected with the rear arm.

6. The roller-side automatic paper delivery device according to claim 5, characterized in that: The return push rod sleeve is provided with a sliding sleeve hinged to the rear arm, and the return push rod sleeve is provided with a compression spring with one end pushing the sliding sleeve.

7. The roller-side automatic paper delivery device according to claim 1, characterized in that: The lower swing opening cam is fan-shaped, with the middle part of its outer edge radially sunken and two ends raised to form an opening boss; the maximum curvature radius of the swing driving cam starts after the paper delivery gripper reaches the paper outlet and ends after the paper delivery gripper pulls the paper to the paper transfer roller for delivery and release.

8. The roller-side automatic paper delivery device according to claim 7, characterized in that: When the rear side of the lower swing tooth opening cam retreats, it pushes the front gauge paper stop mechanism to make it swing to a certain angle to release the paper.

9. The roller-side automatic paper delivery device according to claim 7, characterized in that: Before the paper delivery gripper swings up into position, the opening boss on the upper part of the lower opening cam pushes the opening swing arm so that the paper delivery gripper is opened; the lower opening cam continues to swing upward and backward to release the opening swing arm so that the paper delivery gripper closes and bites the paper; when the paper delivery gripper swings down to the connecting position, the opening boss on the lower part of the lower opening cam pushes the opening swing arm so that the paper delivery gripper is opened and the paper is released; the maximum curvature radius section of the swing driving cam is maintained at at least 135°.

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