Automatic distance separation waste removing and conveying device for printed paper

Abstract

The utility model belongs to the field of printing equipment, and particularly relates to an automatic distance separation waste removing and conveying device for printed paper. Comprising a support, a conveying mechanism, a paper pressing mechanism and a waste removing mechanism. The conveying mechanism comprises a front conveying belt and a rear conveying belt which are arranged in the same direction and installed on a support in a spaced mode. The paper pressing mechanism comprises a plurality of strip-shaped bases arranged side by side and a plurality of paper pressing wheels rotationally installed on the strip-shaped bases, the paper pressing wheels are arranged at intervals in the extending direction of the strip-shaped bases and used for abutting against the feeding surface of the front conveying belt or the rear conveying belt, the strip-shaped bases are divided into two sets from the middle, and the paper pressing wheels on the strip-shaped bases in the same set rotate in the same direction. The paper pressing wheels on different groups of strip-shaped seats rotate towards different directions; the waste removing mechanism is arranged between the front conveying belt and the rear conveying belt and used for enabling the starting end of the rear conveying belt to be connected to the tail end of the front conveying belt through the waste removing mechanism or enabling the front conveying belt and the rear conveying belt to be spaced.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of printing equipment, and particularly relates to an automatic post-printing paper spacing, rejecting and conveying device. BACKGROUND

[0002] In the production process of printed matter, due to uneven ink distribution, paper damage, printing misplacement or color deviation, a certain number of unqualified products will be produced after the paper goes through a series of processes such as printing and drying. If these unqualified products are mixed into the finished products, the quality of the printed matter and the satisfaction of the customers will be seriously affected. Therefore, in the post-printing processing stage, these unqualified products need to be rejected. The traditional rejection method mainly relies on manual inspection, which is not only low in efficiency, but also prone to missed or mistaken inspection, increasing the labor cost and quality risk. With the development of automation technology, various automatic rejection devices appear on the market, but most of the devices still have deficiencies in the continuous conveying, spacing and rejecting of the paper. For example, the paper is prone to overlap or misplacement during the conveying process, resulting in inaccurate rejection; at the same time, frequent shutdown is required during the rejection process, affecting the production efficiency. Therefore, it is necessary to solve the above technical problems. SUMMARY

[0003] The purpose of the embodiment of the application is to provide an automatic post-printing paper spacing, rejecting and conveying device to solve the technical problem of low rejection efficiency in the prior art.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the application is to provide an automatic post-printing paper spacing, rejecting and conveying device, comprising:

[0005] a support;

[0006] a conveying mechanism comprising a front conveying belt and a rear conveying belt which are arranged in the same direction and are installed on the support in an interval;

[0007] a paper pressing mechanism comprising a plurality of strip-shaped seats arranged side by side and a plurality of paper pressing wheels rotatably installed on the strip-shaped seats, the strip-shaped seats extending along the feeding direction of the conveying mechanism from the starting end of the front conveying belt to the end of the rear conveying belt, a plurality of the paper pressing wheels being arranged in an interval along the extension direction of the strip-shaped seats and being used for abutting against the feeding surface of the front conveying belt or the rear conveying belt, a plurality of the strip-shaped seats being divided into two groups from the longitudinal middle of the support, and the paper pressing wheels on each group of the strip-shaped seats being rotated from the longitudinal middle of the support to the outside direction relative to the feeding direction;

[0008] a rejection mechanism arranged between the front conveying belt and the rear conveying belt and used for connecting the starting end of the rear conveying belt to the end of the front conveying belt through the rejection mechanism or keeping the front conveying belt and the rear conveying belt in an interval.

[0009] Optionally, the paper pressing mechanism further comprises a support and a turnover frame hingedly connected to the support at one end;

[0010] The rotation center axis of the turnover frame relative to the support is parallel to the extending direction of the strip-shaped seats, and all the strip-shaped seats are connected to and can be driven to turn over by the turnover frame.

[0011] Optionally, a through slot for accommodating the paper pressing wheel is arranged on the strip-shaped seat;

[0012] The paper pressing mechanism further comprises a stop rod connected to the strip-shaped seat, and the paper pressing wheel is located below the stop rod and is limited by the stop rod to be kept in the through slot.

[0013] Optionally, all the strip-shaped seats are arranged between the support and the bracket;

[0014] The end of the turnover frame away from the support is detachably connected to the bracket.

[0015] Optionally, the paper pressing mechanism further comprises a clamping seat connected to the bracket;

[0016] The end of the turnover frame away from the support is clamped to the clamping seat.

[0017] Optionally, the paper pressing mechanism further comprises a handle connected to the turnover frame.

[0018] Optionally, the paper pressing mechanism further comprises a rotating shaft rotatably installed on the bracket and a paper stop plate connected to the rotating shaft, a swing arm connected to the rotating shaft, and a cylinder connected to the end of the swing arm away from the rotating shaft.

[0019] The rotating shaft is drivingly connected to the cylinder through the swing arm and can be driven by the cylinder to drive the paper stop plate to rotate, and the paper stop plate is arranged between the front conveying belt and the rear conveying belt and can engage the front conveying belt and the rear conveying belt or block the target printed matter from being transferred from the front conveying belt to the rear conveying belt during the rotation following the rotating shaft.

[0020] Optionally, the front conveying belt and the rear conveying belt are respectively provided with a plurality of groups corresponding to the strip-shaped seats and are respectively opposite to the front surfaces of the strip-shaped seats.

[0021] Optionally, the post-printing paper automatic spacing and rejecting conveying device further comprises a tensioning mechanism.

[0022] The tensioning mechanism comprises support shafts and cross arms arranged in parallel and at intervals, a plurality of adjusting arms connected to the support shafts at intervals along the axial direction of the support shafts and capable of rotating around the support shafts, tensioning wheels rotatably connected to the adjusting arms, and a plurality of adjusting bolts threadedly connected to the cross arms;

[0023] The central shafts of the tensioning wheels are parallel to the support shafts, the ends of the adjusting bolts abut against the adjusting arms and are capable of driving the adjusting arms to rotate relative to the support shafts during the screwing relative to the cross arms, and the front conveying belt and the rear conveying belt abut against different tensioning wheels respectively.

[0024] Optionally, the front conveying belt abuts against the tensioning wheels through the outer surface, and the rear conveying belt abuts against the tensioning wheels through the inner surface.

[0025] The tensioning mechanism further comprises an auxiliary wheel rotatably mounted on the support frame, the central shaft of the auxiliary wheel is parallel to the tensioning wheels and abuts against the outer surface of the rear conveying belt.

[0026] The automatic post-printing paper spacing and waste removing conveying device provided in the application has the following beneficial effects: compared with the prior art, the automatic post-printing paper spacing and waste removing conveying device provided in the application is provided with a paper pressing mechanism and a waste removing mechanism. The strip-shaped seats arranged side by side in the paper pressing mechanism and the paper pressing wheels rotatably mounted on the strip-shaped seats can cooperate with the front conveying belt and the rear conveying belt to convey the target printed matter. Since the plurality of strip-shaped seats are divided into two groups from the middle, and the paper pressing wheels on each group of strip-shaped seats are rotated outward from the longitudinal middle of the support frame relative to the feeding direction, i.e., the paper pressing wheels on the same group of strip-shaped seats are rotated in the same direction, and the paper pressing wheels on different groups of strip-shaped seats are rotated in the outward direction of the support frame, the target printed matter conveyed side by side and continuously on the front conveying belt and the rear conveying belt can be gradually separated and reach the predetermined spacing distance under the action of the two groups of paper pressing wheels during the forward conveying, so that the two target printed matters still closely arranged after being cut in the previous process can be automatically separated during the conveying, which is convenient for the receiving and processing of the subsequent process. Moreover, since the front conveying belt and the rear conveying belt are provided with an interval, the waste removing mechanism arranged between the two can accurately remove the waste by connecting the front conveying belt and the rear conveying belt or keeping the interval between the front conveying belt and the rear conveying belt, so that the automatic post-printing paper spacing and waste removing conveying device provided in the application can efficiently remove the waste, which is much better than the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0028] Figure 1 The overall structure of the automatic distance separating and waste removing conveying device for post-printing paper in the embodiment of the present application Figure 1 ;

[0029] Figure 2 The overall structure of the automatic distance separating and waste removing conveying device for post-printing paper in the embodiment of the present application Figure 2 ;

[0030] Figure 3 The overall structure of the automatic distance separating and waste removing conveying device for post-printing paper in the embodiment of the present application

[0031] Figure 4 The structure of A in the embodiment of the present application Figure 3

[0032] Figure 5 The overall structure of the automatic distance separating and waste removing conveying device for post-printing paper in the embodiment of the present application

[0033] Figure 6 The partial structure of the automatic distance separating and waste removing conveying device for post-printing paper in the embodiment of the present application

[0034] Figure 7 The structure of B-B in the embodiment of the present application Figure 6

[0035] In the drawings, the reference signs are as follows: 100, support; 201, front conveying belt; 202, rear conveying belt; 301, strip-shaped seat; 302, paper pressing wheel; 303, support; 304, turnover frame; 305, through groove; 306, blocking rod; 307, clamping seat; 308, handle; 309, sink groove; 401, rotating shaft; 402, paper blocking plate; 403, swing arm; 404, air cylinder; 501, supporting shaft; 502, cross arm; 503, adjusting arm; 504, tensioning wheel; 505, adjusting bolt; 506, auxiliary wheel. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0037] ​​It should be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0038] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0040] Please refer to Figures 1 to 7 , now a kind of automatic post-printed paper spacing and waste conveying device provided by the embodiment of the application will be described. The automatic post-printed paper spacing and waste conveying device includes a bracket 100, a conveying mechanism, a paper pressing mechanism and a waste removing mechanism. Wherein:

[0041] The conveying mechanism includes a front conveying belt 201 and a rear conveying belt 202 arranged in the same direction and installed at intervals on the bracket 100; the paper pressing mechanism includes a plurality of strip-shaped seats 301 arranged side by side and a plurality of paper pressing wheels 302 rotatably installed on the strip-shaped seats 301, the strip-shaped seats 301 extend from the starting end of the front conveying belt 201 to the end of the rear conveying belt 202 along the feeding direction of the conveying mechanism, the plurality of paper pressing wheels 302 are arranged at intervals along the extension direction of the strip-shaped seats 301 and used to abut against the feeding surface of the front conveying belt 201 or the rear conveying belt 202, the plurality of strip-shaped seats 301 are divided into two groups from the longitudinal middle of the bracket 100, and the paper pressing wheels 302 on each group of strip-shaped seats 301 are rotated from the longitudinal middle of the bracket 100 to the outside direction relative to the feeding direction; the waste removing mechanism is arranged between the front conveying belt 201 and the rear conveying belt 202 and used to connect the starting end of the rear conveying belt 202 to the end of the front conveying belt 201 through the waste removing mechanism or keep the front conveying belt 201 and the rear conveying belt 202 at intervals. Generally speaking, the rotation directions of the paper pressing wheels 302 on different groups of strip-shaped seats 301 can form an included angle C of 1°-3°, and in order to facilitate the description, the included angle C between the two groups of paper pressing wheels 302 in the embodiment is taken as 2° for example.

[0042] According to the above structure provided in the embodiment, the automatic post-printed paper separating and waste conveying device provided in the embodiment is provided with a paper pressing mechanism and a waste removing mechanism. The strip-shaped seats 301 arranged side by side in the paper pressing mechanism and the paper pressing wheels 302 rotatably installed on the strip-shaped seats 301 can cooperate with the front conveying belt 201 and the rear conveying belt 202 to convey the target printed matter. Since the strip-shaped seats 301 are divided into two groups from the middle and the paper pressing wheels 302 on each group of strip-shaped seats 301 are rotated by the support 100 from the middle of the longitudinal direction to the outside direction, that is, the paper pressing wheels 302 on the same group of strip-shaped seats 301 are rotated in the same direction, and the paper pressing wheels 302 on different groups of strip-shaped seats 301 are respectively rotated to the outside direction of the support 100, the target printed matter conveyed side by side and continuously on the front conveying belt 201 and the rear conveying belt 202 can be gradually separated and reach the predetermined interval distance in the process of being conveyed forward under the action of the two groups of paper pressing wheels 302, so that the two target printed matters still closely arranged after being cut in the previous process can be automatically separated in the conveying process, which facilitates the receiving and processing of the subsequent process, and can significantly avoid the problem of overlapping and mispositioning of the paper in the conveying process. Moreover, since the interval is provided between the front conveying belt 201 and the rear conveying belt 202, the waste removing mechanism provided between the two can accurately remove the waste by connecting or keeping the interval of the front conveying belt 201 and the rear conveying belt 202, so that the automatic post-printed paper separating and waste conveying device provided in the embodiment can efficiently remove the waste, which is much better than the prior art.

[0043] In another embodiment of the present application, please refer to Figures 1 to 7 , the paper pressing mechanism further comprises a support 303 and a turnover frame 304 hingedly connected to one end of the support 303; the rotation center axis of the turnover frame 304 relative to the support 303 is parallel to the extension direction of the strip-shaped seats 301, and all the strip-shaped seats 301 are connected to the turnover frame 304 and can be turned over by the turnover frame 304. According to the above structure provided in the embodiment, the turnover frame 304 rotatable relative to the support 303 can drive the strip-shaped seats 301 away from the front conveying belt 201 and the rear conveying belt 202, that is, the turnover frame 304 can be used to conveniently turn over all the strip-shaped seats 301 upward when there is a paper jam or cleaning and maintenance, so that the front conveying belt 201 and the rear conveying belt 202 are completely exposed, which is beneficial to make the cleaning and maintenance work of the automatic post-printed paper separating and waste conveying device provided in the embodiment simple and convenient, and improves the maintainability of the device.

[0044] In another embodiment of the present application, please refer to Figures 1 to 7The through slot 305 is arranged on the strip-shaped seat 301 for accommodating the paper pressing wheel 302; the paper pressing mechanism further comprises a blocking rod 306 connected to the strip-shaped seat 301, and the paper pressing wheel 302 is located below the blocking rod 306 and is limited by the blocking rod 306 to be kept in the through slot 305, for details, see Figure 4 The sink groove 309 is arranged on the strip-shaped seat 301 at both sides of the through slot 305, and the rotating shaft of the paper pressing wheel 302 is supported by the sink groove 309. According to the above structure provided in the embodiment, the paper pressing wheel 302 is arranged in the through slot 305, which can reduce the weight of the strip-shaped seat 301 and facilitate operation on one hand, and on the other hand, it can facilitate the operator to observe the rotation of the paper pressing wheel 302 during operation. In addition, the blocking rod 306 connected to the strip-shaped seat 301 in the embodiment can stably keep the paper pressing wheel 302 in the through slot 305, which is conducive to keeping the structure of the paper pressing wheel 302 stable during the process of following the turnover frame 304 to turn and is conducive to the long-term stable operation of the post-printing paper automatic spacing and waste removal conveying device in the embodiment.

[0045] In another embodiment of the present application, please refer to Figures 1 to 7 All strip-shaped seats 301 are arranged between the support 303 and the support 100; the end of the turnover frame 304 away from the support 303 is detachably connected to the support 100. According to the above structure provided in the embodiment, the turnover frame 304 detachably connected to the support 100 can be supported by the support 100 and the support 303 together and significantly improve the structural stability of the paper pressing wheel 302 during the process of cooperating with the conveying target printed matter, at the same time, it is convenient to turn up the turnover frame 304 during cleaning and maintenance, which is conducive to further improving the waste removal efficiency of the post-printing paper automatic spacing and waste removal conveying device in the embodiment.

[0046] In another embodiment of the present application, please refer to Figures 1 to 7 The paper pressing mechanism further comprises a clamping seat 307 connected to the support 100; the end of the turnover frame 304 away from the support 303 is clamped to the clamping seat 307. According to the above structure provided in the embodiment, the end of the turnover frame 304 away from the support 303 in the form of clamping to the clamping seat 307 can improve the connection and disassembly efficiency of the turnover frame 304 and the support 100, which is conducive to further improving the waste removal efficiency of the post-printing paper automatic spacing and waste removal conveying device in the embodiment.

[0047] In another embodiment of the present application, please refer to Figures 1 to 7 The paper pressing mechanism further comprises a handle 308 connected to the turnover frame 304. According to the above structure provided in the embodiment, the handle 308 connected to the turnover frame 304 can facilitate the operator to turn over the turnover frame 304, which is conducive to further improving the waste removal efficiency of the post-printing paper automatic spacing and waste removal conveying device in the embodiment.

[0048] In another embodiment of the present application, referring to Figures 1 to 7 , the rejecting mechanism comprises a rotating shaft 401 rotatably installed on the bracket 100 and a paper blocking plate 402 connected to the rotating shaft 401, further comprises a swing arm 403 connected to the rotating shaft 401, a cylinder 404 connected to the end of the swing arm 403 away from the rotating shaft 401; the rotating shaft 401 is drivingly connected to the cylinder 404 through the swing arm 403 and can be driven by the cylinder 404 to rotate the paper blocking plate 402, the paper blocking plate 402 is arranged between the front conveying belt 201 and the rear conveying belt 202 and can link or block the target printed matter from being transferred from the front conveying belt 201 to the rear conveying belt 202 in the process of following the rotating shaft 401 to rotate. According to the above structure provided in the embodiment, the cylinder 404 can drive the rotating shaft 401 to rotate by driving the swing arm 403, so that the paper blocking plate 402 connected to the rotating shaft 401 can switch to different postures, thereby making the front conveying belt 201 and the rear conveying belt 202 link with each other or keeping a distance between them, referring to Figure 7 When the paper blocking plate 402 is in a horizontal state driven by the rotating shaft 401, the target printed matter conveyed by the front conveying belt 201 can continue to advance on the upper surface of the paper blocking plate 402 and reach the rear conveying belt 202 to continue to be conveyed backward, when the front end of the paper blocking plate 402 is lifted up higher than the front conveying belt 201 driven by the rotating shaft 401, the target printed matter will be guided to fall from below by the lower end surface of the paper blocking plate 402 to realize rejection, which is beneficial to the defective printed matter to more accurately separate from the conveying path between the front conveying belt 201 and the rear conveying belt 202, and is beneficial to further improve the rejection efficiency of the automatic distance separating and rejecting conveying device for printed paper after printing in the embodiment.

[0049] In another embodiment of the present application, referring to Figures 1 to 7 , the front conveying belt 201 and the rear conveying belt 202 are respectively provided with a plurality of groups corresponding to the strip-shaped seat 301 and are respectively opposite to the front surface of the strip-shaped seat 301. According to the above structure provided in the embodiment, the front conveying belt 201 and the rear conveying belt 202 are respectively provided with a plurality of groups corresponding to the strip-shaped seat 301, which can make the paper pressing wheel 302 installed on the strip-shaped seat 301 better cooperate with the front conveying belt 201 or the rear conveying belt 202, which is beneficial to further improve the rejection efficiency of the automatic distance separating and rejecting conveying device for printed paper after printing in the embodiment.

[0050] In another embodiment of the present application, referring to Figures 1 to 7, the automatic spacing and waste conveying device further comprises a tensioning mechanism; the tensioning mechanism comprises support shafts 501 and cross arms 502 which are parallel to each other and arranged at intervals, further comprises a plurality of adjusting arms 503 which are connected to the support shafts 501 along the axial direction of the support shafts 501 and can rotate around the support shafts 501, tensioning wheels 504 which are rotatably connected to the adjusting arms 503, and a plurality of adjusting bolts 505 which are screw-connected to the cross arms 502; the central shafts of the tensioning wheels 504 are parallel to the support shafts 501, the ends of the adjusting bolts 505 abut against the adjusting arms 503 and can drive the adjusting arms 503 to rotate relative to the support shafts 501 in the process of being screwed relative to the cross arms 502, and the front conveying belt 201 and the rear conveying belt 202 abut against different tensioning wheels 504 respectively.

[0051] According to the above structure provided in the embodiment, when the adjusting bolts 505 are screwed relative to the cross arms 502, the adjusting arms 503 abutting against the adjusting bolts 505 can be driven to rotate relative to the support shafts 501, so that the tensioning wheels 504 connected to the adjusting arms 503 can make the front conveying belt 201 or the rear conveying belt 202 reach a predetermined tensioning degree by following the movement of the adjusting arms 503. In addition, since the adjusting arms 503 and the adjusting bolts 505 are arranged in correspondence with the number of the front conveying belt 201 and the rear conveying belt 202, the tensioning degree of each of the front conveying belt 201 and the rear conveying belt 202 can be adjusted individually, which is conducive to further improving the waste removal efficiency of the automatic spacing and waste conveying device for post-printed paper sheets in the embodiment.

[0052] In another embodiment of the present application, please refer to Figures 1 to 7 , the front conveying belt 201 abuts against the tensioning wheels 504 through the outer side surface, and the rear conveying belt 202 abuts against the tensioning wheels 504 through the inner side surface; the tensioning mechanism further comprises an auxiliary wheel 506 which is rotatably installed on the support frame 100, and the central shaft of the auxiliary wheel 506 is parallel to the tensioning wheels 504 and abuts against the outer side surface of the rear conveying belt 202. According to the above structure provided in the embodiment, the rear conveying belt 202 and the front conveying belt 201 abut against the tensioning wheels 504 through the inner and outer side surfaces respectively, which can significantly optimize the overall structural design of the automatic spacing and waste conveying device for post-printed paper sheets in the embodiment. In addition, the auxiliary wheel 506 abutting against the outer side surface of the rear conveying belt 202 can also make the rear conveying belt 202 maintain a stable envelope angle in the tensioning process, which is conducive to further improving the waste removal efficiency of the automatic spacing and waste conveying device for post-printed paper sheets in the embodiment.

[0053] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic off-line and waste conveying device for post-printed paper, characterized in that, It comprises: a support (100); a conveying mechanism comprising a front conveying belt (201) and a rear conveying belt (202) arranged in the same direction and installed on the support (100) at intervals; a paper pressing mechanism comprising a plurality of strip-shaped seats (301) arranged side by side and a plurality of paper pressing wheels (302) rotatably installed on the strip-shaped seats (301), the strip-shaped seats (301) extending from the starting end of the front conveying belt (201) to the end of the rear conveying belt (202) along the feeding direction of the conveying mechanism, the plurality of paper pressing wheels (302) being arranged at intervals along the extension direction of the strip-shaped seats (301) and used for abutting against the feeding surface of the front conveying belt (201) or the rear conveying belt (202), the strip-shaped seats (301) being divided into two groups from the longitudinal middle of the support (100), the paper pressing wheels (302) on each group of strip-shaped seats (301) being rotated from the longitudinal middle of the support (100) to the outside direction relative to the feeding direction; a rejection mechanism arranged between the front conveying belt (201) and the rear conveying belt (202) and used for connecting the starting end of the rear conveying belt (202) to the end of the front conveying belt (201) through the rejection mechanism or keeping the front conveying belt (201) and the rear conveying belt (202) at intervals.

2. The automatic paper conveying and rejecting device according to claim 1, characterized in that: the paper pressing mechanism further comprises a support base (303) and a turnover frame (304) hingedly connected to the support base (303); the rotation center axis of the turnover frame (304) relative to the support base (303) is parallel to the extension direction of the strip-shaped seats (301), and all the strip-shaped seats (301) are connected to the turnover frame (304) and can be turned over by the turnover frame (304).

3. The automatic paper conveying and rejecting device according to claim 2, characterized in that: the strip-shaped seats (301) are provided with through grooves (305) for accommodating the paper pressing wheels (302); the paper pressing mechanism further comprises a blocking rod (306) connected to the strip-shaped seats (301), and the paper pressing wheels (302) are located below the blocking rod (306) and are limited by the blocking rod (306) to be kept in the through grooves (305).

4. The automatic paper conveying and rejecting device according to claim 2, characterized in that: all the strip-shaped seats (301) are arranged between the support base (303) and the support (100); the end of the turnover frame (304) away from the support base (303) is detachably connected to the support (100).

5. The automatic paper conveying and rejecting device according to claim 4, characterized in that: the paper pressing mechanism further comprises a clamping seat (307) connected to the support (100); the end of the turnover frame (304) away from the support base (303) is clamped to the clamping seat (307).

6. The automatic paper conveying and rejecting device according to claim 5, characterized in that: The paper pressing mechanism further comprises a handle (308) connected to the turnover frame (304).

7. The post-print paper automatic distance separating and rejecting conveying device according to claim 1, characterized in that: The rejecting mechanism comprises a rotating shaft (401) rotatably installed on the support frame (100) and a paper blocking plate (402) connected to the rotating shaft (401), further comprises a swing arm (403) connected to the rotating shaft (401), a pneumatic cylinder (404) connected to the swing arm (403) away from the rotating shaft (401); The rotating shaft (401) is drivingly connected to the pneumatic cylinder (404) through the swing arm (403) and can be driven by the pneumatic cylinder (404) to drive the paper blocking plate (402) to rotate, the paper blocking plate (402) is arranged between the front conveying belt (201) and the rear conveying belt (202) and can link the front conveying belt (201) and the rear conveying belt (202) or block the target printed matter from being transferred from the front conveying belt (201) to the rear conveying belt (202) during the rotation of the rotating shaft (401).

8. The post-print paper automatic distance separating and rejecting conveying device according to claim 1, characterized in that: The front conveying belt (201) and the rear conveying belt (202) are respectively provided with a plurality of groups corresponding to the strip-shaped seat (301) and are respectively opposite to the strip-shaped seat (301) in the front.

9. The post-print paper automatic distance separating and rejecting conveying device according to claim 8, characterized in that: The post-print paper automatic distance separating and rejecting conveying device further comprises a tensioning mechanism; The tensioning mechanism comprises support shafts (501) and cross arms (502) arranged in parallel and spaced apart, further comprises a plurality of adjusting arms (503) connected to the support shafts (501) along the axial direction of the support shafts (501) and capable of rotating around the support shafts (501), tensioning wheels (504) rotatably connected to the adjusting arms (503), and a plurality of adjusting bolts (505) threadedly connected to the cross arms (502); The central shafts of the tensioning wheels (504) are parallel to the support shafts (501), the ends of the adjusting bolts (505) abut against the adjusting arms (503) and can drive the adjusting arms (503) to rotate relative to the support shafts (501) during the screwing relative to the cross arms (502), and the front conveying belt (201) and the rear conveying belt (202) abut against different tensioning wheels (504) respectively.

10. The post-print paper automatic distance separating and rejecting conveying device according to claim 9, characterized in that: The front conveying belt (201) abuts against the tensioning wheels (504) through the outer side surface, and the rear conveying belt (202) abuts against the tensioning wheels (504) through the inner side surface; The tensioning mechanism further comprises an auxiliary wheel (506) rotatably installed on the support frame (100), the central shaft of the auxiliary wheel (506) is parallel to the tensioning wheels (504) and abuts against the outer side surface of the rear conveying belt (202).

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