CN213767839U

CN213767839U - Unqualified product marking device of printing assembly line

Info

Publication number: CN213767839U
Application number: CN202022277759.8U
Authority: CN
Inventors: 陈�全
Original assignee: Shanghai Furubayashi International Printing & Packaging Co ltd
Current assignee: Shanghai Furubayashi International Printing & Packaging Co ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2021-07-23
Anticipated expiration: 2030-10-13

Abstract

The application discloses a unqualified product marking device of a printing production line, which relates to the technical field of printing product inspection equipment and comprises a paper tape wheel mechanism and a conveying and cutting mechanism, wherein the paper tape wheel mechanism and the conveying and cutting mechanism are arranged on the printing production line, a marking paper tape is wound on the paper tape wheel mechanism, the conveying and cutting mechanism comprises a cutter assembly used for cutting off the marking paper tape, and a feeding assembly used for drawing out the marking paper tape from a paper tape wheel and conveying the marking paper tape to the cutter assembly; the cutter assembly comprises a cutter and a driving piece for driving the cutter to move, the position of the paper tape cut by the cutter is located above the paper stack, and the position of the paper tape cut by the cutter exceeds the stacking plane range of the paper stack. The purpose of observing and finding unqualified products is realized by clamping the marking paper tape on the unqualified paper tape; the product inspection operator can quickly find out and complete the rejection operation of unqualified products by observing the position of the marking paper tape on the paper stack externally, and then the purpose of improving the convenience and accuracy of the product inspection operation is achieved.

Description

Unqualified product marking device of printing assembly line

Technical Field

The application relates to the technical field of printing product inspection equipment, in particular to a defective product marking device of a printing production line.

Background

Printing (Printing) is a technique of transferring ink to the surface of a material such as paper, textile, or PVC by performing processes such as plate making, inking, and pressing on an original such as characters, pictures, photographs, and forgery prevention, and copying the content of the original in bulk.

The prior Chinese patent with the publication number of CN206264563U discloses a full-automatic screen printing production line, which comprises a frame, wherein a feeding pre-positioning video alignment station, a plug hole printing station, a first turning plate video alignment station, a second turning plate video alignment station, an A-surface printing station, a B-surface printing station, a discharging station and a transmission mechanism are sequentially arranged on the frame. The printing paper is firstly subjected to vision correction through a plurality of stations, and then is conveyed to a printing station through a transmission mechanism to be printed on the surface A and the surface B.

According to the related technology, in the actual printing process, the printed matter needs to be subjected to spot inspection, and when unqualified printed matter is detected, the unqualified printed matter needs to be marked so as to remove the unqualified printed matter in the later period. Generally, the marks are directly sprayed on the surface of the printed matter through a code spraying device, but the sprayed marks are small and fuzzy and are not easy to identify, so that the convenience and the accuracy of subsequent product inspection and rejection operations are influenced.

SUMMERY OF THE UTILITY MODEL

In order to reach the purpose that improves quality control operation convenience and accuracy, this application provides a defective products marking device of printing assembly line.

The application provides a defective product marking device of printing assembly line adopts following technical scheme:

a unqualified product marking device of a printing production line comprises a paper tape wheel mechanism and a conveying and cutting mechanism, wherein the paper tape wheel mechanism and the conveying and cutting mechanism are mounted on the printing production line and used in a matched mode, a marking paper tape is wound on the paper tape wheel mechanism, the conveying and cutting mechanism comprises a cutter assembly used for cutting off the marking paper tape, and a feeding assembly used for drawing out the marking paper tape from a paper tape wheel and conveying the marking paper tape to the cutter assembly; the cutter subassembly is including the cutter of the direction of delivery cutting mark paper tape of perpendicular to mark paper tape to and be used for driving the driving piece of cutter motion, just the position that the cutter cut the paper tape is located the top of paper buttress, the position that the cutter cut the paper tape surpasss the stack plane scope of paper buttress.

Through adopting above-mentioned technical scheme, when the assembly line detected unqualified printed matter, carry cutting mechanism's pay-off subassembly to take out the mark paper tape on the paper tape wheel mechanism and carry to cutter unit spare department, cutter unit spare's driving piece drive cutter motion cuts off the mark paper tape, then the mark paper tape that is cut off drops on the paper buttress of stack under self action of gravity to in-process carried the stack at the paper is pressed from both sides and is located the paper buttress, and the mark paper tape has the part to surpass the paper buttress and exposes outside, the person of being convenient for to inspect observes the position of looking for the mark paper tape. The purpose of observing and finding unqualified products is realized by clamping the marking paper tape on the unqualified paper tape; the product inspection operator can quickly find out and complete the rejection operation of unqualified products by observing the position of the marking paper tape on the paper stack externally, and then the purpose of improving the convenience and accuracy of the product inspection operation is achieved.

Preferably, the conveying and cutting mechanism further comprises a shell, a feeding hole and a discharging hole for the marking paper tape to pass through are formed in the front end and the rear end of the shell respectively, and the cutter assembly and the feeding assembly are arranged in the shell at positions close to the discharging hole and the feeding hole respectively; the feeding assembly comprises rollers which are arranged in pairs, the rollers are connected with power parts which drive the rollers to rotate, and the marking paper tape penetrates through the middle positions of the two rollers and is extruded, folded and conveyed by the two rollers.

Through adopting above-mentioned technical scheme, power spare drive gyro wheel rotates, and gyro wheel pivoted in-process drives the mark paper tape and carries to cutter unit spare department, and cutter unit spare cutting mark paper tape accomplishes the transport cutter action of mark paper tape. In the process of conveying the marking paper tape, the roller extrudes the marking paper tape and enables the marking paper tape to be folded, and the folding conveying mode is convenient for quickly conveying the marking paper tape and is also convenient for the cutter assembly to smoothly complete the cutting action.

Preferably, the cutting knife is in a door-shaped structure, and the cutting knife has two cutting edges which are arranged obliquely relative to each other and intersect to form a linear intersection line.

By adopting the technical scheme, the cutter is arranged to be of a door-shaped structure so as to be matched with the folded marking paper tape; the cutting edge with the straight line intersection line is adopted to cut the marking paper tape, so that the smoothness of cutting the marking paper tape is improved, and meanwhile, the rapid cutting action is realized.

Preferably, a protective cover is arranged outside the cutter, and the protective cover is of a door-shaped structure.

Through adopting above-mentioned technical scheme, the safety cover both played the effect of protection cutter and personnel's safety, played the effect of the mark paper tape state that the restriction is cut off to a certain extent again.

Preferably, the feeding port is provided with a guide rail for guiding the marking paper tape to enter the middle of the two rollers, and the guide rail is provided with a tightening structure from outside to inside.

Through adopting above-mentioned technical scheme, adopt the guide rail who sets up to tightening structure to accomplish the transport guide action of mark paper tape to accomplish the pre-gathering of mark paper tape before the folding transport mark paper tape of gyro wheel, so that the gyro wheel is smooth and easy and accomplish folding transport action fast, is favorable to mark paper tape to accurately and smoothly pass through the feed inlet simultaneously.

Preferably, the roller is sleeved with a rubber sleeve.

Through adopting above-mentioned technical scheme, the rubber sleeve plays the effect of protection gyro wheel and mark paper tape, plays the effect that increases mark paper tape transport friction simultaneously to reduce the possibility that the mark paper tape takes place the phenomenon of skidding.

Preferably, the shell is provided with a feeding purging mechanism for purging the feeding hole.

Through adopting above-mentioned technical scheme, set up the feeding at feed inlet department and sweep the mechanism, the volume that can effectively reduce the wastepaper granule that produces in the printing assembly line and get into the casing from the feed inlet, and then reach and reduce casing internal part and take place to damage the risk, reduce the feed inlet and block up the risk and improve the purpose that the folding transport of mark paper tape is smooth and easy nature because of the wastepaper granule is too much.

Preferably, the shell is provided with a discharging purging mechanism for purging the discharging port.

Through adopting above-mentioned technical scheme, set up the ejection of compact at discharge gate department and sweep the mechanism, the cooperation feeding sweeps the mechanism and further reduces the volume that the wastepaper granule that produces in the printing assembly line got into the casing from the discharge gate.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by means of the mode that the marking paper tape is clamped on the unqualified paper tape, a product inspection operator can observe the position of the marking paper tape on the paper stack externally, and can quickly find out and complete the rejection operation of the unqualified product, so that the purposes of improving the convenience and accuracy of the product inspection operation are achieved.

2. The marking paper tape is cut off quickly and smoothly by adopting a mode of completing the cutting action by matching folding conveying with a special cutter.

3. The feeding purging mechanism is matched with the discharging purging mechanism, so that the quantity of paper scrap particles generated in the production line entering the marking device is limited, and the purposes of improving the conveying smoothness and stability of the marking paper tape are achieved.

Drawings

FIG. 1 is a schematic view of an embodiment of a reject marking apparatus of the present application installed in a printing line;

FIG. 2 is a schematic view of the paper pulley mechanism and the conveying cutter mechanism;

FIG. 3 is a schematic view mainly used for showing the front structure of the paper pulley mechanism;

FIG. 4 is a schematic view of the back side of the paper wheel mechanism

FIG. 5 is a schematic diagram primarily showing the feed purge mechanism, the discharge purge mechanism, and the protective cover;

FIG. 6 is a schematic structural view of a feed assembly;

fig. 7 is a schematic view of the structure of the guide rail;

FIG. 8 is a schematic view of the cutter assembly;

fig. 9 is a schematic view of a control system of a defective product marking apparatus according to an embodiment of the present application.

Reference numerals: 1. a printing assembly line; 11. a frame; 12. a detector; 2. a paper tape wheel mechanism; 21. a mounting frame; 211. a first support plate; 212. a second support plate; 213. mounting a rod; 214. mounting blocks; 215. mounting holes; 22. a rotating frame; 221. mounting a disc; 222. a connecting frame; 222-A, bent end; 222-B, a non-bent end; 23. a first regulating groove; 24. a first locking member; 25. a second regulating groove; 26. a second locking member; 27. a third locking member; 28. a fourth locking member; 3. a conveying and cutting mechanism; 31. a cutter assembly; 32. a feeding assembly; 33. a fixed mount; 331. a fixing plate; 332. a housing; 332-A, a feed inlet; 332-B and a discharge hole; 34. a protective cover; 35. perforating holes; 4. marking a paper tape; 5. a tray body; 51. accommodating grooves; 52. installing a shaft; 53. installing a sleeve; 54. an opening; 55. mounting grooves; 56. opening the gap; 61. a roller; 611. a rubber sleeve; 62. a power member; 63. a guide rail; 71. a cutter; 711. cutting edges; 72. a drive member; 73. a transfer block; 81. a feed purge mechanism; 82. a discharging purging mechanism; 9. a control module; 91. and a controller.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses defective product marking device of printing assembly line.

Referring to fig. 1 and 2, the defective product marking device of the printing line comprises a paper belt wheel mechanism 2 and a conveying and cutting mechanism 3 which are installed on the printing line 1, a marking paper belt 4 is wound on a paper belt wheel mechanism 2, the conveying and cutting mechanism 3 comprises a cutter assembly 31 and a feeding assembly 32, the cutter assembly 31 is used for cutting off the marking paper belt 4, and the feeding assembly 32 is used for drawing out the marking paper belt 4 on the paper belt wheel mechanism 2 and feeding the marking paper belt to the cutter assembly 31. When unqualified printed products are detected, the feeding assembly 32 is provided with the marking paper tape 4 drawn out of the paper tape wheel mechanism 2 and conveyed to the cutter assembly 31, the cutter assembly 31 finishes cutting action, so that the cut marking paper tape 4 falls onto the unqualified printed products and is clamped by the overlapped printed products, and one end of the cut and clamped marking paper tape 4 extends out of a printed product stack, so that a product inspector can find and identify the positions of the unqualified printed products.

Referring to fig. 1 and 2, the paper tape wheel mechanism 2 and the conveying and cutting mechanism 3 are both disposed at a blanking position of the printing line 1, the paper tape wheel mechanism 2 is located at an edge position of the frame 11 of the printing line 1, and the conveying and cutting mechanism 3 is located inside the frame 11 of the printing line 1 and close to a printed matter, that is, the mounting positions of the paper tape wheel mechanism 2 and the conveying and cutting mechanism 3 need to be correspondingly set, and the marking paper tape 4 drawn out by the feeding assembly 32 on the paper tape wheel mechanism 2 needs to penetrate through the frame 11 of the printing line 1.

It should be noted that, in the following description, the printing line 1 and its frame 11 can be seen from fig. 1, and will not be further described.

Referring to fig. 3 and 4, the tape wheel mechanism 2 includes a mounting frame 21 connected to the frame 11 of the printing line 1, a rotating frame 22 detachably connected to the mounting frame 21, the rotating frame 22 including a mounting plate 221 for winding the marking tape 4, and a connecting frame 222 connecting the mounting plate 221 and the mounting frame 21; the marking paper tape 4 wound in the mounting plate 221 is drawn out by the feeding assembly 32 and fed to the cutter assembly 31 to complete the cutting operation. The mounting disc 221 includes a disc body 5, the disc body 5 is a disc-shaped structure, and a holding groove 51 for holding the marking paper tape 4 is formed in the disc body 5. The disc body 5 is vertically arranged, a mounting shaft 52 penetrates through the center of the disc body and is in threaded locking connection, a mounting sleeve 53 is coaxially sleeved on the mounting shaft 52, and the mounting sleeve 53 is in rotating fit with the mounting shaft 52; the marking paper tape 4 is wound on the mounting sleeve 53 and is integrally embedded in the accommodating groove 51, and two side edges of the integral structure are abutted against two side walls of the accommodating groove 51, so that the scattering of the marking paper tape 4 is limited, and the normal extraction of the marking paper tape 4 is not influenced.

Referring to fig. 3 and 4, an opening 54 for placing the marking paper tape 4 is formed in the vertically upward arc side of the tray body 5, a mounting groove 55 is formed in the vertically upward direction on the end surface of one side of the tray body 5, one end of the mounting shaft 52 is clamped outside the bottom of the mounting groove 55, the other end of the mounting shaft 52 extends into the tray body 5 and is in threaded connection with the end surface of the other side of the tray body 5, and the mounting shaft 52 is in sliding fit with the mounting groove 55, so that a user can complete the replacement of the mounting shaft 52, the mounting sleeve 53 and the marking paper tape 4 through the mounting groove 55 and the opening 54.

Referring to fig. 3 and 4, in order to facilitate the user to replace the mounting shaft 52, the mounting sleeve 53 and the marking paper tape 4, notches 56 are formed on both side end surfaces of the tray body 5, so that the user can hold the marking paper tape 4 wound on the mounting shaft 52.

Referring to fig. 3 and 4, the mounting frame 21 includes a first support plate 211, a second support plate 212 and a mounting rod 213 which are in locking connection with the printing line 1, the first support plate 211 is provided with an L-shaped plate structure, the horizontal part of the first support plate 211 is in locking connection with the printing line 1, and the vertical part of the first support plate 211 is in locking connection with the second support plate 212; the lower end of the second support plate 212 is integrally formed with a mounting block 214, and a mounting hole 215 is horizontally formed in the mounting block 214 in a penetrating manner; the mounting rod 213 is inserted into and locked to the mounting hole 215, and the adapter bracket is locked to the mounting rod 213. The horizontal portion of the first supporting plate 211 extends along the conveying direction of printed matters, a first adjusting groove 23 is formed in the first supporting plate 211 along the length direction of the first supporting plate, a first locking piece 24 is in threaded connection with the printing production line 1 through the first adjusting groove 23, and screws can be used as the first locking piece 24 to achieve the purpose of adjusting the horizontal erection position of the marking paper tape 4. The second support plate 212 is connected with the vertical part of the first support plate 211 in a locking mode, the vertical part of the first support plate 211 and the second support plate 212 extend along the height direction of the vertical part to form a second adjusting groove 25, the second adjusting grooves 25 of the first support plate 211 and the second support plate 212 are provided with a second locking piece 26 in a penetrating and locking mode, the second locking piece 26 can be formed by matching of screws and bolts, and the purpose of adjusting the vertical erection position of the marking paper tape 4 is achieved. The mounting block 214 is in threaded connection with a third locking piece 27, a stud with a handle can be used as the third locking piece 27, and the stud vertically penetrates through the mounting block 214 and abuts against and locks the mounting rod 213; the mounting rod 213, which is inserted through the mounting block 214, is horizontally moved closer to or farther from the printing line 1 and then locked, so as to adjust the length of the drawn marking tape 4.

Referring to fig. 3 and 4, in order to further facilitate the user to replace the mounting shaft 52, the mounting sleeve 53 and the marking paper tape 4, the connecting frame 222 is configured to be a substantially J-shaped plate structure, and the non-bending end 222-B of the connecting frame 222 and the disc body 5 are connected with a screw in a penetrating manner and are matched with a nut to complete locking, while the bending end 222-a of the connecting frame 222 and the mounting rod 213 are matched in a plugging manner, that is, the mounting rod 213 is embedded in the bending end 222-a of the connecting frame 222 and is connected with the fourth locking member 28 in a locking manner, a screw can be used as the fourth locking member 28, and a screw is inserted through the bending end 222-a of the locking connecting frame 222 and the mounting rod 213 to realize a detachable mounting structure. Because the mounting frame 21 is mounted close to the top of the frame 11 of the printing line 1, it is less spaced from the top of the frame 11 of the printing line 1; when the connecting frame 222 and the mounting rod 213 are mounted, the bending end 222-a of the connecting frame 222 needs to complete the insertion and matching action with the mounting rod 213 from bottom to top, and a combination manner from bottom to top is adopted, that is, the connecting frame is inserted and matched with the mounting frame 21 from a direction away from the top of the printing production line 1 to a direction close to the top of the printing production line 1, so that the structure of the rack 11 of the printing production line 1 can be effectively avoided, and the operable space is larger.

Referring to fig. 2 and 5, the feeding and cutting mechanism 3 includes a fixing frame 33 locked in the printing line 1, the fixing frame 33 includes a fixing plate 331 locked to an original structure inside the printing line 1, and a housing 332 locked to the fixing plate 331, and the feeding unit 32 and the cutter unit 31 are installed in the housing 332. The fixing plate 331 has an L-shaped plate structure, a vertical portion of the fixing plate 331 is lockingly coupled to an original structure of the printing line 1, and the housing 332 is lockingly mounted on a horizontal portion of the fixing plate 331. A feed port 332-A and a discharge port 332-B are respectively formed at the front end and the rear end of the shell 332, and the feeding component 32 and the cutter component 31 are respectively arranged at the positions close to the feed port 332-A and the discharge port 332-B in the shell 332; the feeding component 32 extracts the marking paper tape 4 and conveys the marking paper tape 4 to the cutter component 31, and then the cutter component 31 finishes the cutting action. It should be noted that the locking position of the fixing frame 33 should be close to the material taking opening at the blanking position of the printing production line 1, and the material taking opening is the operation position for manually finishing the blanking of the printed matter, so as to facilitate the maintenance and the overhaul of a user.

Referring to fig. 5 and 6, the feeding assembly 32 includes a pair of rollers 61 installed in the housing 332, and a rubber sleeve 611 is sleeved around the rollers 61; the rollers 61 are horizontally and rotatably mounted in the housing 332, the rollers 61 are respectively connected with a power part 62 for driving the rollers 61 to rotate, the rollers 61 can be directly driven to rotate by a motor, and the purpose of driving the rollers 61 to rotate can be realized by matching the motor with transmission structures such as gear engagement, worm and gear engagement and the like. Referring to fig. 7, a guide rail 63 is installed at the feed opening 332-a of the housing 332, and the guide rail 63 is configured to extend from the feed opening 332-a to the inside of the housing 332, and the width of the rail opening 54 is gradually narrowed, so that the marking paper tape 4 extracted by the two rollers 61 is firstly primarily bent by the guide rail 63, and then is inserted into the middle position of the two rollers 61, and the final extrusion folding conveying is completed, that is, the marking paper tape 4 is relatively folded and conveyed.

Referring to fig. 5 and 8, the cutter assembly 31 includes a cutter 71 vertically disposed outside the discharge port 332-B of the housing 332, and a driving member 72 located inside the housing 332 and driving the cutter 71 to vertically move, an air cylinder may be used as the driving member 72, and a piston rod of the air cylinder is connected to the cutter 71 to connect a switching block 73, so as to achieve the purpose of driving the cutter 71 to move, and in the process of driving the cutter 71 to move, the switching block 73 may vertically press the bent marking paper tape 4, so as to balance the bending degree and the flattening degree of the marking paper tape 4, thereby achieving the purpose of improving the cutting smoothness of the cutter 71.

Referring to fig. 5 and 8, the cutting operation is completed by using the cutting knife 71 with a door-shaped structure, that is, the cutting knife 71 has two cutting edges 711 which are relatively inclined, and the two cutting edges 711 are joined to form a linear intersection line; the shape of the cutter 71 corresponds to the structure of the extruded and folded marking paper tape 4, and the two side edges of the marking paper tape 4 are cut first, and then the middle position of the marking paper tape 4 is cut, so that the aims of further improving the smoothness of the cutting operation and the trimming regularity of the cut opening are fulfilled. In order to protect the cutter 71, a protective cover 34 is mounted on the outer side of the cutter 71 on the shell 332 in a locking manner, through holes 35 are formed in the protective cover 34 and an original mechanism used for locking the fixing frame 33 on the printing production line 1, and the through holes 35 in the protective cover 34 are of a door-shaped structure matched with the shape of the cutter 71, so that the purpose that the mark paper tape 4 conveyed and cut passes through and drops on a printed matter stack is achieved.

Referring to fig. 5, since a large amount of paper dust particles are generated during a printing operation, particularly during a printing operation of a printed matter of paper, and the paper dust particles are accumulated at the inlet 332-a and the outlet 332-B of the housing 332 to affect a normal feeding and cutting operation of the label paper tape 4, it is necessary to install the feeding purge mechanism 81 and the discharging purge mechanism 82 at positions of the inlet 332-a and the outlet 332-B on the housing 332 for the purpose of purging adsorbed paper dust particles, and a serpentine connected to a gas source may be used as the feeding purge mechanism 81 and the discharging purge mechanism 82, and a user only needs to adjust the serpentine to be periodically opened and to blow air toward the inlet 332-a and the outlet 332-B of the housing 332 to complete the purging operation.

Referring to fig. 9, the conveying and cutting mechanism 3 is further connected to a control module 9, the control module 9 includes a controller 91 located in the housing 332, the controller 91 may be formed by a power supply, a PLC control circuit, and the like, the PLC control circuit in the controller 91 is in signal connection with the detector 12, the power member 62 of the feeding assembly 32, and the driving member 72 of the cutter assembly 31, which are provided on the printing line 1, and the detector 12 may be a graphic sensor for detecting a surface pattern of a printed matter, a color sensor for detecting a surface color of the printed matter, or a linear sensor for detecting whether the printed matter is conveyed in place. When the detector 12 sends a signal to the controller 91, the controller 91 sends a signal to control the power member 62 and the driving member 72 to operate so as to feed the marking tape 4 and cut the marking tape 4, and to cause the cut marking tape 4 to drop onto the defective printed matter.

The implementation principle of the embodiment of the application is as follows:

the user needs to adjust the mounting position of the conveying and cutting mechanism 3 and the paper pulley mechanism 2 on the printing production line 1 in advance, then the starting end of the marking paper tape 4 on the paper pulley mechanism 2 is drawn out and fed into the shell 332 under the conveying coordination of the feeding assembly 32, and a small section of the marking paper tape 4 needs to be drawn out from the discharge port 332-B of the shell 332, so that the pre-mounting operation is completed. When the detector 12 on the printing production line 1 detects a defective product signal, the controller 91 receives the signal and controls the power member 62 of the feeding assembly 32 and the driving member 72 of the cutter assembly 31, the two power members 62 respectively drive the respective rollers 61 to rotate so as to achieve the purpose of extruding, folding and conveying the marking paper tape 4, that is, in the process of continuously extruding, folding and conveying the marking paper tape 4, the marking paper tape 4 wound in the tray body 5 is continuously extracted, the marking paper tape 4 conveyed to the cutter assembly 31 is cut by the driving member 72 driving the cutter 71, and the cut marking paper tape 4 falls onto a defective product under the combined action of conveying inertia and gravity, so that the purpose of marking a defective product is achieved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a defective product marking device of printing assembly line which characterized in that: the automatic paper tape cutting machine comprises a paper tape wheel mechanism (2) and a conveying and cutting mechanism (3), wherein the paper tape wheel mechanism (2) and the conveying and cutting mechanism (3) are installed on a printing production line (1) and used in a matched mode, a marking paper tape (4) is wound on the paper tape wheel mechanism (2), the conveying and cutting mechanism (3) comprises a cutter assembly (31) used for cutting off the marking paper tape (4), and a feeding assembly (32) used for drawing out the marking paper tape (4) from a paper tape wheel and conveying the marking paper tape to the cutter assembly (31); cutter subassembly (31) are including cutter (71) of the direction of delivery cutting mark paper tape (4) of perpendicular to mark paper tape (4) to and be used for driving piece (72) of cutter (71) motion, just the position that cutter (71) cut the paper tape is located the top of paper buttress, the position that cutter (71) cut the paper tape surpasss the stack plane scope of paper buttress.

2. A reject marking apparatus for a printing line according to claim 1, wherein: the conveying and cutting mechanism (3) further comprises a shell (332), a feeding hole (332-A) and a discharging hole (332-B) through which the marking paper tape (4) passes are formed in the front end and the rear end of the shell (332), and the cutter assembly (31) and the feeding assembly (32) are arranged in the shell (332) at positions close to the discharging hole (332-B) and the feeding hole (332-A) respectively; the feeding assembly (32) comprises rollers (61) which are arranged in pairs, the rollers (61) are connected with power parts (62) which drive the rollers to rotate, and the marking paper tape (4) penetrates through the middle positions of the two rollers (61) and is extruded, folded and conveyed by the two rollers (61).

3. A reject marking apparatus of a printing line according to claim 1 or 2, wherein: the cutting knife (71) is of a door-shaped structure, and the cutting knife (71) is provided with two cutting edges (711) which are oppositely arranged in an inclined mode and are intersected to form a linear intersection line.

4. A reject marking apparatus for a printing line according to claim 3, wherein: a protective cover (34) is arranged outside the cutter (71), and the protective cover (34) is of a door-shaped structure.

5. A reject marking apparatus for a printing line according to claim 2, wherein: the feeding hole (332-A) is provided with a guide rail (63) used for guiding the marking paper tape (4) to enter the middle of the two rollers (61), and the guide rail (63) is of a tightening structure from outside to inside.

6. A reject marking apparatus for a printing line according to claim 2, wherein: and a rubber sleeve (611) is sleeved outside the roller (61).

7. A reject marking apparatus for a printing line according to claim 2, wherein: and a feeding purging mechanism (81) for purging the feeding hole (332-A) is arranged on the shell (332).

8. A reject marking apparatus of a printing line according to claim 2 or 7, wherein: and a discharging purging mechanism (82) used for purging the discharging port (332-B) is arranged on the shell (332).