CN109201517B - Printing quality detection device - Google Patents
Printing quality detection device Download PDFInfo
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- CN109201517B CN109201517B CN201811226683.7A CN201811226683A CN109201517B CN 109201517 B CN109201517 B CN 109201517B CN 201811226683 A CN201811226683 A CN 201811226683A CN 109201517 B CN109201517 B CN 109201517B
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- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 238000012937 correction Methods 0.000 claims abstract description 23
- 239000000123 paper Substances 0.000 claims description 292
- 239000002699 waste material Substances 0.000 claims description 23
- 230000003749 cleanliness Effects 0.000 claims description 19
- 230000005484 gravity Effects 0.000 claims description 19
- 238000007689 inspection Methods 0.000 claims description 11
- 239000011111 cardboard Substances 0.000 claims description 2
- 238000007373 indentation Methods 0.000 abstract description 5
- 239000000047 product Substances 0.000 description 6
- 210000001503 joint Anatomy 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 241000255925 Diptera Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/02—Measures preceding sorting, e.g. arranging articles in a stream orientating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/361—Processing or control devices therefor, e.g. escort memory
- B07C5/362—Separating or distributor mechanisms
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
- G01N2021/8917—Paper, also ondulated
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Controlling Sheets Or Webs (AREA)
Abstract
The invention relates to the technical field of equipment for detecting paper, in particular to printing quality detection equipment. In the printing quality detection equipment, the paper feeding unit comprises a lifting platform and a flying head positioned above the lifting platform, the lifting platform is used for placing paper to be detected and driving the paper to be detected to ascend, the flying head is used for adsorbing the paper to be detected on the lifting platform and conveying the paper to be detected to the correction unit, the correction unit is used for correcting the direction of the paper to be detected and conveying the paper to be detected to the image acquisition unit, and the image acquisition unit is used for acquiring images of the printing surface of the paper to be detected; the control system is respectively and electrically connected with the flying head, the lifting platform and the image acquisition unit. The printing quality detection equipment provided by the invention has no requirement on the shape of paper, can be suitable for the paper with lighter quality, can not generate the condition of single double-sheet emission, basically can not scratch the paper, can not leave an indentation on the paper, and ensures the quality of the paper to be detected and the integrity of a printing surface.
Description
Technical Field
The invention relates to the technical field of equipment for detecting paper, in particular to printing quality detection equipment.
Background
When printing on paper, the printing quality is inevitably unacceptable, and in order to remove the paper with unacceptable printing quality, the printing quality of the paper is generally detected.
At present, a quality inspection machine for inspecting printed paper generally clamps the paper by using belts attached to each other and uses friction force of the belts to the paper to realize paper dispensing, and the paper feeding mode is difficult to adapt to paper with special shape, is easy to produce double sheets for light paper at a time, and is easy to scratch the paper or leave marks on the paper when the paper which is easy to wear is conveyed.
In summary, how to overcome the above-mentioned drawbacks of the existing inspection machine is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide printing quality detection equipment so as to solve the technical problems that paper with special shape is difficult to adapt to in a quality inspection machine in the prior art, single-time double-sheet sending is easy to occur for light paper, and paper is easy to scratch or mark is left on paper when the paper which is easy to wear is conveyed.
The invention provides printing quality detection equipment which comprises a paper feeding unit, a correction unit, an image acquisition unit and a control system.
The paper feeding unit comprises a flying head and a lifting platform, the flying head is located above the lifting platform, the lifting platform is used for placing paper to be tested and driving the paper to be tested to ascend, the flying head is used for adsorbing the paper to be tested on the lifting platform and conveying the paper to be tested to the correction unit, the correction unit is used for correcting the direction of the paper to be tested conveyed by the flying head and conveying the paper to be tested to the image acquisition unit, and the image acquisition unit is used for acquiring images of printing surfaces of the paper to be tested.
The control system is respectively and electrically connected with the flying head, the lifting platform and the image acquisition unit, and is used for controlling the operation of the flying head and the lifting of the lifting platform, and the control system is also used for receiving the image acquired by the image acquisition unit and analyzing whether the quality of the printing surface of the current paper to be detected is qualified or not.
Preferably, as an implementation manner, the image acquisition unit includes a first paper suction conveying belt and a first image acquisition device, where the first paper suction conveying belt is used to adsorb the paper to be measured conveyed by the correction unit and convey the paper to be measured; the first image acquisition device is electrically connected with the control system and is used for acquiring images of the printing surface of the paper to be detected on the first paper suction conveying belt and sending the acquired images to the control system.
Preferably, as an implementation manner, the image acquisition unit includes a second paper suction conveying belt and a second image acquisition device, the second paper suction conveying belt is used for adsorbing the paper to be detected conveyed by the first paper suction conveying belt and conveying the paper to be detected, and the second image acquisition device is used for acquiring an image of the back surface of the printing surface of the paper to be detected on the second paper suction conveying belt; the second image acquisition device is electrically connected with the control system, and the control system is used for receiving the image acquired by the second image acquisition device and analyzing whether the cleanliness of the back surface of the printing surface of the current paper to be tested is qualified or not.
Preferably, as an implementation manner, the printing quality detection device further comprises a third paper sucking conveying belt, a fourth paper sucking conveying belt and a waste rejection unit, wherein the third paper sucking conveying belt is used for sucking and conveying the paper conveyed by the second paper sucking conveying belt, and the top surface of the third paper sucking conveying belt is attached to the back surface of the printing surface of the paper; the top surface of the third paper sucking and conveying belt is coplanar with the top surface of the fourth paper sucking and conveying belt, and the fourth paper sucking and conveying belt is used for receiving and adsorbing the paper which is qualified in printing and qualified in cleanliness and conveyed by the third paper sucking and conveying belt.
The waste removing unit is located between the third paper sucking conveying belt and the fourth paper sucking conveying belt, the waste removing unit is electrically connected with the control system, the control system detects that qualified paper enters the fourth paper sucking conveying belt from the third paper sucking conveying belt, and the control system detects that unqualified paper is removed by the waste removing unit.
Preferably, as an implementation manner, the reject removing unit includes a flap and a flap driving member, a surface of the flap is coplanar with a top surface of the third paper suction conveying belt, the flap can rotate around a side edge close to the fourth paper suction conveying belt, the other side edge of the flap is in butt joint with an output end of the third paper suction conveying belt, the flap driving member is electrically connected with the control system, and the flap driving member is used for driving the flap to rotate.
When the paper which is detected as unqualified in printing and/or unqualified in cleanliness reaches the tail end of the third paper sucking conveying belt, the control system controls the flap driving piece to drive the flap to turn upwards, and after the current paper passes through, the control system controls the flap driving piece to drive the flap to turn downwards and reset.
Preferably, as an implementation manner, a guide plate and a collecting box are arranged below the turning plate, the top end of the guide plate is in butt joint with the output end of the third paper absorbing and conveying belt, the bottom end of the guide plate is in butt joint with the inlet of the collecting box, and the guide plate is used for guiding paper unqualified in printing and/or unqualified in cleanliness into the collecting box.
Preferably, as an implementation manner, the waste product removing unit further comprises an alarm and an infrared sensor, the infrared sensor is opposite to the inside of the collecting box, the infrared sensor is used for sensing the height of paper in the collecting box, and the infrared sensor and the alarm are electrically connected with the control system.
Preferably, as an implementation manner, the printing quality detection device further comprises a fixedly arranged guide rail, wherein the guide rail extends along a direction perpendicular to the conveying direction of the paper, and the guide rail is in sliding fit with the collecting box.
Preferably, as an implementation manner, the correction unit comprises a breadth adjusting mechanism, two conveying belts, a plurality of gravity balls and two side gauges, wherein the conveying belts are in one-to-one correspondence with the side gauges.
The breadth adjusting mechanism is used for adjusting the distance between the two side gauges; the side gauge comprises side plates and a top plate, the two side plates of the side gauge are respectively used for being abutted to two side edges of paper to be measured, the two conveying belts are respectively located right below the corresponding top plate, the top plate is provided with mounting holes corresponding to the gravity balls one by one, the gravity balls are mounted in the corresponding mounting holes, the bottoms of the gravity balls are respectively abutted to the corresponding conveying belts and can roll on the conveying belts, and the paper to be measured passes through the space between the conveying belts and the gravity balls.
Preferably, as an implementation manner, the paper feeding unit further comprises a bracket and an auxiliary paper carrying assembly, wherein the auxiliary paper carrying assembly comprises at least two carrying rods; the upper surface of lift platform is provided with two at least and cardboard's direction of delivery vertically recess, the carrier bar with the recess cooperation, just the carrier bar with the support can dismantle the connection.
Compared with the prior art, the invention has the advantages that:
the printing quality detection equipment provided by the invention mainly comprises a paper feeding unit, a correction unit, an image acquisition unit and a control system, wherein a flying head and a lifting platform are arranged in the paper feeding unit, a pile of paper to be detected can be placed on the lifting platform, the flying head above the lifting platform can adsorb the paper to be detected at the topmost part on the lifting platform and can only adsorb a single paper, the control system can control the lifting platform to ascend, so that the distance between the paper to be detected at the topmost part and the flying head is maintained in an adsorbable range, the control system can control the lifting platform to descend when the lifting platform needs to supplement the paper to be detected, so that the paper to be detected can be placed on the lifting platform, and after the paper to be detected is adsorbed on the flying head, the control system can control the flying head to drive the paper to be detected to move so as to convey the paper to be detected to the correction unit; the correcting unit can correct the azimuth of the paper to be detected conveyed by the feeder head, and can convey the paper to be detected to the image collecting unit, the skew degree of the paper to be detected corrected by the correcting unit can be limited in a detection range, so that the image of the printing surface of the paper to be detected, which is collected by the image collecting unit, can be effectively compared with the image of a qualified product in the control system, and the detection precision of judging whether the printing quality of the printing surface of the current paper to be detected is qualified or not by the control system is improved.
Obviously, the printing quality detection equipment provided by the invention adopts a paper-sending form of vacuum paper suction, has no requirement on the shape of paper, can adapt to the light paper, and can not generate the condition of single-time double-paper sending.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic perspective view of a print quality detecting apparatus according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of a paper feeding unit according to an embodiment of the present invention;
fig. 3 is a schematic perspective view of a correction unit according to an embodiment of the present invention;
fig. 4 is a schematic structural position diagram of a first paper suction conveying belt, a first image collecting device, a second paper suction conveying belt and a second image collecting device in an image collecting unit provided by the embodiment of the invention, and an arrow indicates a conveying direction of paper;
fig. 5 is a schematic diagram of an assembly structure of a third paper suction conveying belt, a fourth paper suction conveying belt and a reject unit according to an embodiment of the present invention, and an arrow indicates a conveying direction of paper;
fig. 6 is a schematic perspective view of a reject unit according to an embodiment of the present invention, with arrows indicating the conveying direction of the paper;
fig. 7 is a schematic diagram of a print quality detecting apparatus according to an embodiment of the present invention.
Icon: 1-a paper feeding unit; a 2-correction unit; 3-an image acquisition unit; 4-a third paper sucking and conveying belt; 5-a fourth paper sucking and conveying belt; 6-a waste rejection unit; 7-a control system; 8-an alarm; 9-a stacking unit;
11-flying to the head; 12-lifting platform; 13-a bracket;
21-a conveyor belt; 22-a housing box; 23-side gauge; 24-a breadth adjusting mechanism;
31-a first paper suction conveyor belt; 32-a first image acquisition device; 33-a second paper suction conveyor belt; 34-a second image acquisition device;
61-turning plate; 62-flap drive; 63-a guide plate; 64-collecting box; 65-an infrared sensor; 66-guide rail.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention will now be described in further detail by way of specific examples of embodiments in connection with the accompanying drawings.
Referring to fig. 1, 2 and 7, the present embodiment provides a print quality detecting apparatus including a paper feeding unit 1, a correction unit 2, an image capturing unit 3 and a control system 7;
the paper feeding unit 1 comprises a flying head 11 and a lifting platform 12, wherein the flying head 11 is positioned above the lifting platform 12, the lifting platform 12 is used for placing paper to be tested and driving the paper to be tested to ascend, the flying head 11 is used for adsorbing the paper to be tested on the lifting platform 12 and conveying the paper to be tested to the correcting unit 2, the correcting unit 2 is used for correcting the direction of the paper to be tested conveyed by the flying head 11 and conveying the paper to be tested to the image acquisition unit 3, and the image acquisition unit 3 is used for acquiring an image of a printing surface of the paper to be tested;
the control system 7 is respectively and electrically connected with the flying head 11, the lifting platform 12 and the image acquisition unit 3, the control system 7 is used for controlling the operation of the flying head 11 and the lifting of the lifting platform 12, and the control system 7 is also used for receiving the image acquired by the image acquisition unit 3 and analyzing whether the quality of the printing surface of the current paper to be detected is qualified.
According to the printing quality detection equipment provided by the embodiment, stacked paper to be detected can be placed on the lifting platform 12, the flying head 11 above the lifting platform 12 can adsorb the paper to be detected at the topmost part on the lifting platform 12 and can only adsorb a single paper, the control system 7 can control the lifting platform 12 to ascend, so that the distance between the paper to be detected at the topmost part and the flying head 11 is maintained in an adsorbable range, the control system 7 can control the lifting platform 12 to descend when the lifting platform 12 needs to supplement the paper to be detected, so that the paper to be detected can be placed on the lifting platform 12, and after the paper to be detected is adsorbed on the flying head 11, the control system 7 can control the flying head 11 to drive the paper to be detected to move so as to convey the paper to be detected to the correction unit 2; the correction unit 2 can correct the azimuth of the paper to be measured conveyed by the feeder head 11, and the correction unit 2 can also convey the paper to be measured to the image acquisition unit 3, the skew degree of the paper to be measured corrected by the correction unit 2 can be limited within the detection range, so that the image of the printing surface of the paper to be measured acquired by the image acquisition unit 3 can be effectively compared with the image of the qualified product in the control system 7, and the detection precision of judging whether the printing quality of the printing surface of the current paper to be measured is qualified by the control system 7 is improved.
Obviously, the printing quality detection equipment provided by the embodiment adopts the paper-sending form of vacuum paper suction, has no requirement on the shape of paper, can adapt to the light paper, and can not generate the condition of single sending of double sheets.
The specific structure and technical effects related to the technical scheme of the second embodiment are as follows:
referring to fig. 4, a first paper sucking and conveying belt 31 and a first image collecting device 32 may be disposed in the specific structure of the image collecting unit 3, where the first paper sucking and conveying belt 31 can adsorb the paper to be measured conveyed by the correction unit 2 and convey the paper to be measured, that is, the first paper sucking and conveying belt 31 drives the paper to be measured to move by the adsorption force to the paper to be measured, so that the first paper sucking and conveying belt 31 can adapt to the paper with lighter mass and the paper with different shapes well, and the paper is not scratched, no indentation is left on the paper, and the quality of the paper to be measured and the integrity of the printing surface are further ensured; the first image acquisition device 32 can acquire an image of the printing surface of the paper to be tested on the first paper suction conveying belt 31, and the first image acquisition device 32 is electrically connected with the control system 7, so that the image acquired by the first image acquisition device 32 can be sent to the control system 7, and the control system 7 analyzes and judges whether the printing quality of the printing surface of the current paper to be tested is qualified (including the gloss oil and the concave-convex condition of the printing surface, whether dirty points exist and whether the gold stamping running problem exists or not).
In the specific structure of the image acquisition unit 3, a second paper suction conveying belt 33 and a second image acquisition device 34 can be further arranged, the second paper suction conveying belt 33 can absorb the paper to be detected conveyed by the first paper suction conveying belt 31 and convey the paper to be detected, that is, the second paper suction conveying belt 33 drives the paper to be detected to move through the absorption force of the paper to be detected, so that the second paper suction conveying belt 33 can well adapt to the paper with lighter mass and the paper with different shapes, the paper cannot be scratched, no indentation is left on the paper, and the quality of the paper to be detected and the integrity of a printing surface are further ensured; the second image acquisition device 34 can acquire an image of the back surface of the printing surface of the paper to be tested on the second paper suction conveying belt 33, and the first image acquisition device 32 is electrically connected with the control system 7, so that the image acquired by the first image acquisition device 32 can be sent to the control system 7, and the control system 7 analyzes and judges whether the cleanliness of the back surface of the printing surface of the current paper to be tested is qualified (including whether the printing surface of the current paper to be tested has mosquito, ink spots and other stains).
Specifically, referring to fig. 1 and 5, a third paper suction conveying belt 4 and a fourth paper suction conveying belt 5 may be further disposed after the second paper suction conveying belt 33, the top surface of the third paper suction conveying belt 4 is coplanar with the top surface of the fourth paper suction conveying belt 5, and the third paper suction conveying belt 4 is capable of adsorbing the paper to be tested conveyed by the second paper suction conveying belt 33 and conveying the paper; a waste removing unit 6 is arranged between the third paper sucking conveying belt 4 and the fourth paper sucking conveying belt 5, the waste removing unit 6 is electrically connected with the control system 7, and under the normal transportation condition, namely under the condition that the control system 7 does not detect paper with unqualified printing and/or unqualified cleanliness, the waste removing unit 6 does not act, and the fourth paper sucking conveying belt 5 can receive and adsorb the paper with qualified printing and qualified cleanliness conveyed by the third paper sucking conveying belt 4; when the control system 7 detects that the paper with unqualified printing and/or unqualified cleanliness is about to reach the position where the reject removing unit 6 is located, the control system 7 controls the reject removing unit 6 to act so as to remove the paper with unqualified printing and/or unqualified cleanliness, namely, the paper with unqualified printing quality and/or unqualified cleanliness is not allowed to be transmitted to the fourth paper sucking and conveying belt 5, so that the paper with unqualified printing and/or unqualified cleanliness can be separated from the paper with qualified printing and qualified cleanliness, an automatic reject-kicking function is realized, and the degree of automation is high.
It should be noted that, the third paper sucking conveying belt 4 and the fourth paper sucking conveying belt 5 drive the paper to move through the adsorption force to the paper to be detected, so that the third paper sucking conveying belt 4 and the fourth paper sucking conveying belt 5 can adapt to the light paper and the paper with different shapes well, the paper cannot be scratched, the indentation cannot be left on the paper, and the quality of the paper and the integrity of the printing surface are further ensured.
Specifically, the first paper suction conveyor belt 31, the second paper suction conveyor belt 33, the third paper suction conveyor belt 4 and the fourth paper suction conveyor belt 5 are provided with a plurality of air suction holes, and the air suction holes are communicated with the air suction openings of the vacuum pump, so that the vacuum pump is utilized to suck the air suction holes on the first paper suction conveyor belt 31, the second paper suction conveyor belt 33, the third paper suction conveyor belt 4 and the fourth paper suction conveyor belt 5, and a negative pressure environment is formed at the air suction holes, so that the adsorption of paper is realized.
Referring to fig. 6, a flap 61 and a flap driving member 62 are provided in the specific structure of the reject unit 6, the flap 61 is provided to be rotatable around a side close to the fourth paper suction conveying belt 5, the other side of the flap 61 is abutted with the output end of the third paper suction conveying belt 4, and the top surface of the flap 61 is provided to be coplanar with the top surface of the third paper suction conveying belt 4, so that the paper on the third paper suction conveying belt 4 can be smoothly conveyed onto the fourth paper suction conveying belt 5 across the flap 61; the flap driving piece 62 is electrically connected with the control system 7, when the control system 7 detects that the paper with unqualified printing and/or unqualified cleanliness reaches the tail end of the third paper sucking and conveying belt 4, the control system 7 controls the flap driving piece 62 to drive the flap 61 to turn upwards, an opening can be formed in the original position of the flap 61, the flap 61 can block the paper with unqualified printing at present, the blocked paper can fall from the opening, and reject is realized; when the waste falls completely, the control system 7 controls the flap driving member 62 to drive the flap 61 to turn down and reset, so that the next paper with qualified printing and qualified cleanliness can pass over the flap 61 smoothly.
It should be noted that, compared with the existing method of removing waste products by using skirting, the method of removing waste products by using the baffle plate adopted in the embodiment can alleviate the problem that paper is easy to scratch, so as to provide convenience for waste product utilization in the future.
In particular, the flap driving member 62 can be set as an air cylinder, one end of the air cylinder is fixedly set, the other end of the air cylinder is connected with the flap 61, the air cylinder stretches out and draws back to drive the flap 61 to rotate around the side edge close to the fourth paper sucking conveying belt 5, and the upward turning or downward turning is realized, and the structure is simple and practical.
Preferably, a guide plate 63 and a collecting box 64 can be arranged below the turning plate 61, the top end of the guide plate 63 is in butt joint with the output end of the third paper sucking and conveying belt 4, the bottom end of the guide plate is in butt joint with the inlet of the collecting box 64, and when unqualified printed paper falls down from an opening in the position of the turning plate 61, the guide plate 63 can guide unqualified printed and/or unqualified clean paper into the collecting box 64, and the collecting box 64 is used for collecting waste so as to carry out centralized treatment on the waste.
Further, the alarm 8 and the infrared sensor 65 can be arranged in the waste rejecting unit 6, the infrared sensor 65 is just opposite to the inside of the collecting box 64, so that the infrared sensor 65 is used for sensing the height of paper in the collecting box 64, when the height of the paper is higher than a preset value, the infrared sensor 65 is triggered, the infrared sensor 65 and the alarm 8 are electrically connected with the control system 7, the infrared sensor 65 can send a trigger signal to the control system 7 after being triggered, the control system 7 can send an alarm instruction to the alarm 8 after receiving the trigger signal, the alarm 8 can alarm after receiving the alarm instruction, so that workers can be reminded of processing waste in the collecting box 64, the workers do not need to check the height condition of the paper, and the waste rejecting device is quite intelligent.
Preferably, in the print quality detecting apparatus provided in this embodiment, the guide rail 66 extending in the direction perpendicular to the conveying direction of the paper is fixedly provided, and the guide rail 66 is slidably matched with the collecting box, so that the collecting box is pulled out along the guide rail 66 by a worker, and the collecting box is pushed in along the guide rail 66 after the waste is taken out to continuously receive the waste.
Referring to fig. 3, two conveyor belts 21, a plurality of gravity balls and two side gauges 23 are arranged in the specific structure of the correction unit 2, and the conveyor belts 21 and the side gauges 23 are arranged in one-to-one correspondence; the side gauge 23 comprises side plates and a top plate, and the side plates of the two side gauges 23 are respectively abutted against the two side edges of the paper to be measured so as to correct the orientation of the paper by utilizing the side plates of the side gauge 23; the two conveying belts 21 are respectively arranged right below the corresponding top plates, mounting holes corresponding to the gravity balls one by one are formed in the top plates, the gravity balls are mounted in the corresponding mounting holes, the bottoms of the gravity balls can fall on the corresponding conveying belts 21 to be abutted against the conveying belts 21, the paper to be tested passes through between the conveying belts 21 and the gravity balls, the gravity balls can press the paper to be tested, friction force between the paper to be tested and the conveying belts 21 is increased, the paper to be tested with lighter mass can smoothly move along with the conveying belts 21, meanwhile, the gravity balls can roll on the paper to be tested, the paper to be tested cannot be scratched, and no indentation is left on the paper to be tested.
The correction unit 2 uses a gravity ball to increase friction with respect to vacuum paper suction, so that the correction of skew degree of paper is facilitated.
Preferably, the position that can offer the mounting hole on the roof sets up and holds box 22 to make gravity ball can hold in holding box 22, place to hold the ball and run out, the security is higher.
Preferably, the width adjusting mechanism 24 can be arranged in the specific structure of the correcting unit 2, and the distance between the two side gauges 23 is adjusted by using the width adjusting mechanism 24, so that the correcting unit 2 can correct paper sheets with different widths, and the adaptability is higher.
Referring to fig. 2, a bracket 13 and an auxiliary paper carrying assembly can be further arranged in the specific structure of the paper feeding unit 1, and the auxiliary paper carrying assembly comprises at least two carrying bars; at least two grooves perpendicular to the conveying direction of the paper board are formed in the upper surface of the lifting platform 12, so that the bearing rod can be inserted into the grooves to be matched with the grooves, and the bearing rod is connected with the support 13 in a detachable connection mode.
When the lifting platform 12 is lifted to a certain height, that is, when less paper remains on the lifting platform 12, the bearing rod can be inserted into the groove of the lifting platform 12 and mounted on the bracket 13; then, the control system 7 is used for controlling the lifting platform 12 to descend, and the bearing rod is used for bearing the paper to be tested originally positioned on the lifting platform 12; at this time, the paper to be detected can be supplemented to the lifting platform 12, after the paper on the bearing rod is adsorbed, the bearing rod is detached from the bracket 13, and the lifting platform 12 is controlled to ascend or does not need to ascend by utilizing the control system 7, so that the flying head 11 can adsorb the paper on the lifting platform 12, the normal paper suction of the flying head 11 cannot be influenced in the whole paper supplementing process, uninterrupted detection is realized, and the detection efficiency is improved.
Specifically, a stacking unit 9 is arranged at the tail end of the fourth paper sucking and conveying belt 5, so that the paper which is qualified in printing and qualified in cleanliness on the fourth paper sucking and conveying belt 5 can enter the stacking unit 9, and the stacking unit 9 is used for stacking the paper, so that the paper can be taken and packed later conveniently.
In summary, the invention discloses a printing quality detection device, which overcomes a plurality of technical defects of a traditional inspection machine. The printing quality detection equipment provided by the embodiment adopts the paper-sending form of the vacuum paper-sucking, has no requirement on the shape of paper, can adapt to the paper with lighter quality, and can not generate the condition of single-time double-paper sending.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. The printing quality detection device is characterized by comprising a paper feeding unit, a correction unit, an image acquisition unit and a control system;
the paper feeding unit comprises a flying head and a lifting platform, the flying head is positioned above the lifting platform, the lifting platform is used for placing paper to be tested and driving the paper to be tested to ascend, the flying head is used for adsorbing the paper to be tested on the lifting platform and conveying the paper to be tested to the correcting unit, the correcting unit is used for correcting the direction of the paper to be tested conveyed by the flying head and conveying the paper to be tested to the image collecting unit, and the image collecting unit is used for collecting images of the printing surface of the paper to be tested;
the control system is respectively and electrically connected with the flying head, the lifting platform and the image acquisition unit, and is used for controlling the operation of the flying head and the lifting of the lifting platform, and the control system is also used for receiving the image acquired by the image acquisition unit and analyzing whether the quality of the printing surface of the current paper to be detected is qualified or not;
the paper feeding unit further comprises a bracket and an auxiliary paper carrying assembly, wherein the auxiliary paper carrying assembly comprises at least two bearing rods; the upper surface of lift platform is provided with two at least and cardboard's direction of delivery vertically recess, the carrier bar with the recess cooperation, just the carrier bar with the support can dismantle the connection.
2. The print quality inspection apparatus according to claim 1, wherein the image collection unit includes a first paper suction conveyor belt for sucking the paper to be inspected conveyed by the correction unit and conveying the paper to be inspected, and a first image collection device; the first image acquisition device is electrically connected with the control system and is used for acquiring images of the printing surface of the paper to be detected on the first paper suction conveying belt and sending the acquired images to the control system.
3. The print quality inspection apparatus according to claim 2, wherein the image collection unit includes a second paper suction conveying belt for sucking the sheet to be inspected conveyed by the first paper suction conveying belt and conveying the sheet to be inspected, and a second image collection device for collecting an image of a back surface of the print surface of the sheet to be inspected on the second paper suction conveying belt; the second image acquisition device is electrically connected with the control system, and the control system is used for receiving the image acquired by the second image acquisition device and analyzing whether the cleanliness of the back surface of the printing surface of the current paper to be tested is qualified or not.
4. The print quality inspection apparatus according to claim 3, further comprising a third paper suction conveying belt for sucking and conveying the paper conveyed by the second paper suction conveying belt, a fourth paper suction conveying belt, and a reject removing unit, a top surface of the third paper suction conveying belt being attached to a back surface of a printing surface of the paper; the top surface of the third paper sucking and conveying belt is coplanar with the top surface of the fourth paper sucking and conveying belt, and the fourth paper sucking and conveying belt is used for receiving and adsorbing the paper which is qualified in printing and qualified in cleanliness and conveyed by the third paper sucking and conveying belt;
the waste removing unit is located between the third paper sucking conveying belt and the fourth paper sucking conveying belt, the waste removing unit is electrically connected with the control system, the control system detects that qualified paper enters the fourth paper sucking conveying belt from the third paper sucking conveying belt, and the control system detects that unqualified paper is removed by the waste removing unit.
5. The print quality inspection apparatus of claim 4, wherein the reject unit includes a flap having a plate surface coplanar with a top surface of the third paper suction conveyor belt, the flap being rotatable about a side edge adjacent to the fourth paper suction conveyor belt, and another side edge of the flap being in abutment with an output end of the third paper suction conveyor belt, and a flap drive electrically connected to the control system for driving the flap to rotate;
when the paper which is detected as unqualified in printing and/or unqualified in cleanliness reaches the tail end of the third paper sucking conveying belt, the control system controls the flap driving piece to drive the flap to turn upwards, and after the current paper passes through, the control system controls the flap driving piece to drive the flap to turn downwards and reset.
6. The printing quality detection apparatus according to claim 5, wherein a guide plate and a collecting box are provided below the flap, a top end of the guide plate is abutted with an output end of the third paper suction conveyor belt, a bottom end of the guide plate is abutted with an inlet of the collecting box, and the guide plate is used for guiding paper which is unqualified in printing and/or unqualified in cleanliness into the collecting box.
7. The print quality inspection apparatus according to claim 6, wherein the reject unit further comprises an alarm and an infrared sensor, the infrared sensor is facing the inside of the collection box, the infrared sensor is for sensing the height of the paper in the collection box, and the infrared sensor and the alarm are electrically connected to the control system.
8. The print quality inspection apparatus of claim 7, further comprising a fixedly disposed guide rail extending in a direction perpendicular to the transport direction of the sheet, the guide rail being in sliding engagement with the collection bin.
9. The print quality inspection apparatus according to any one of claims 1 to 8, wherein the correction unit includes a web adjustment mechanism, two conveyor belts, a plurality of gravity balls, and two side gauges, the conveyor belts being in one-to-one correspondence with the side gauges;
the breadth adjusting mechanism is used for adjusting the distance between the two side gauges; the side gauge comprises side plates and a top plate, the two side plates of the side gauge are respectively used for being abutted to two side edges of paper to be measured, the two conveying belts are respectively located right below the corresponding top plate, the top plate is provided with mounting holes corresponding to the gravity balls one by one, the gravity balls are mounted in the corresponding mounting holes, the bottoms of the gravity balls are respectively abutted to the corresponding conveying belts and can roll on the conveying belts, and the paper to be measured passes through the space between the conveying belts and the gravity balls.
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| CN201811226683.7A CN109201517B (en) | 2018-10-19 | 2018-10-19 | Printing quality detection device |
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| CN201811226683.7A CN109201517B (en) | 2018-10-19 | 2018-10-19 | Printing quality detection device |
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