JPS6072730A - Inspecting method and device of printed matter - Google Patents

Abstract

PURPOSE:To reliably inspect the zigzag feeding of a sheet, or the elongation or compression of the sheet by detecting the displaced amount removed from a limiting frame when part of a code to be inspected is removed from the frame provided in a photographing range, and moving inspecting means in response to the displaced amount. CONSTITUTION:Optical detecting means 42 is suspended through an X-table 35 and a Y-table 36, and moves in a plane parallel to the surface of a rolled sheet 1. A photographing range 37 is relatively fixed to the means 42 for the means 42, a code 38 such as number fed into the range 37 is optically detected, compared with a reference printing code to judge whether the printing of the code is proper or not. A limiting frame 39 is determined in the range 37, and when part of the code 38 is displaced due to zigzag feeding of the sheet 1 or, the elongation or compression of the sheet to remove out of the frame 39, the displaced amount is detected, the tables 35, 36 are operated by motors 40, 41 and screwing mechanism in response to the displaced amount to move the means 42, the code 38 is again collected in the fram 39 to inspect it.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for inspecting printed matter such as treasure troves, securities, etc., in which codes such as numbers are printed on each of a large number of small sections distributed in the longitudinal direction on a roll of paper. It is.

When printing this type of printed matter, if there is a malfunction or improper adjustment of the printing device, defects such as incorrect numbering or half-turning of numbers may occur in the printed matter, so a print inspection after printing is essential.

Conventionally, these printed materials have been visually inspected manually, but this kind of visual inspection not only results in omissions, but also is extremely inefficient. . In order to eliminate such drawbacks, the code printed on the printed material is read by a charging conversion means using a camera, and the corresponding electrical signal is compared with the electrical signal of the standard printed code. Automatic inspection methods have been proposed that determine whether or not there are defects such as defects, and display or print the results on a display, printer, alarm, etc.

However, during inspection, the paper meandered in the horizontal direction,
If the paper expands or contracts in the direction of travel, part of the code to be inspected will be out of the camera's field of view (imaging range), and even good print may be incorrectly judged as defective, or it may be completely out of the field of view and inspected. There was a drawback that accidents could occur that could result in disability.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and apparatus for inspecting printed matter, which eliminates the above-mentioned drawbacks of the conventional method and allows reliable inspection even when the paper meanders or expands/contracts.

The present invention provides a printed matter inspection method for inspecting the quality of codes printed in a large number of small sections that are repeatedly distributed with the same pitch distribution for each sheet of a certain sheet length in the operator's direction of the web. The inspection is carried out based on a signal obtained by optically detecting the code, the optical detection is carried out within an imaging range that is fixed relative to the detection means, and a part of the code to be inspected is detected. Detecting the amount of deviation outside the limit frame set within the imaging range 1, the detecting means is moved in accordance with the amount of deviation, and the detection means is moved within the limit frame. A method and apparatus for inspecting a printed matter, characterized in that the code to be inspected is captured again and the code is inspected.

The present invention will be explained using examples and drawings.

In FIG. 1(a), 1 is a web of paper, which moves in the direction of arrow 2. This paper roll 1 has a constant sheet length. ) A large number of small sections 4A, 5A, 6 that are repeatedly distributed with the same pitch distribution in the direction of the technique for each of 3A, 3B, and 3C.
A, 4B, 5B, 6B, 4C.

5C, [liC, etc., and each of the small sections 4A, etc. has symbols 4C' and 5C' such as symbols and numbers.

6C' etc. are printed. For each sheet, determine whether the pitch distribution of each subdivision within the sheet is the same.Subdivisions located in similar positions on each sheet have respective sheet lengths. arranged at a pitch of For example, 4A, 4B.

The distance between each of 4C and the distance between each of 5A, 5B, and 5C is the sheet length. be equivalent to.

? A, 8A, 9A, 7B, 8B, 9B, 7C, 8C.

9C, etc. are reading markers 7- indicating the position of each small section. The reading marks provided on each sheet are distributed with the same pitch distribution. Moreover, this first small section is the first small section to be printed among the small sections on each sheet.

+ OA, IOB, IDC, etc. are starting marks provided on each sheet (I), and are located at fixed positions in each sea F', so the distance between them is the sheet length.

is equal to

The process of printing and inspecting such a web 1 will be explained with reference to FIG.

11 is a feeder that unwinds the web 1 from the roll 12 and supplies it to each of the following processes; 13.14 is a pattern printing unit that prints patterns, starting marks, reading marks, etc.;
15 is a code printing unit that prints codes such as numbers;
The first, second, and crown sections of each sheet (for example, 4 A, 5
A, 6 A) is printed on the first printing cylinder 1B, and the fourth, fifth,
It has a second printing cylinder 17 for printing large and small sections. 1st is the impression cylinder, and the sheet length Lo1. is the circumference of the second printing cylinder 16 or 17. Reference numeral 19 denotes a code inspection means having a detection means 42 such as a television camera as an optical detection means which is linked to a strobe device, 20 a starting mark sensor as a starting mark detection means for sensing a starting mark, and 21 a reading mark. A read mark sensor is a read mark detection means that senses a read mark and emits a read mark pulse every time a mark is read. 22 is an inspection unit;
23 is a sensor (for example, an eccentric cam operation sensor) that issues a signal to start printing, 24 is a cutter unit, and 25 is a stacker.

Details of the code checking means 19 are shown in FIGS. 5 and 6. In the code inspection means 19, optical detection means 42 such as three television cameras are suspended from a frame 34 via an It is possible to move. For the detection means 42, an imaging range 37 is fixed relative to the detection means 42 as shown in FIG. − It is designed to judge whether the printing of the code is good or bad by comparing it with the standard printed code using turn recognition means or the like.

A limit frame 39 is defined within this imaging range 37, and when the web 1 meanders, expands and contracts, and a part of the reference numeral 38 shifts and the limit frame 39 protrudes as shown in FIG. 8, the amount of shift occurs. is detected, and according to the amount of deviation, the X table 35 and Y table 36 are operated by motors 40, 41 such as a pulse motor or servo motor, and a screw mechanism to move the detection means 42, and the code 3 is set as the limit frame. It is designed to be captured again in 39 and inspected.

In this case, even if the reference numeral 38 protrudes from the limit frame 39, it is still within the imaging range 37 when the amount of deviation is detected, so that normal inspection can be continued.

If the relative positions of these code inspection means, mark sensors, etc. are explained with reference to FIG. Code checking means 19 (three in this figure) are disposed at , and a reading mark sensor 21 is provided at a distance L from the code checking means 1910- to a starting mark sensor 20 at a distance L2 downstream from the code checking means 1910-. l
, the distance with the rudder, is L, = kL. (However, k is an integer including 0). In the example shown in this figure, =1.

Further, k may be a negative integer (the reading mark sensor 21 is located upstream from the inspection means 19).

Here, it is assumed that sheets 3A and 3B are trial printing, and actual printing starts from sheet 3C. And Figure 1 (a
) is printed by the first printing cylinder 16 as a printing means.
The state at the moment when the first actual printing was made in the column of the first small section 4C is shown.

, ::f7) Toki, the starting mark on the upstream side closest to the starting mark sensor as a starting mark detection means is the IO
A, and the small section 4C located at the position of this and the first printing cylinder 16
The distance between the reading mark 9A and the reading mark 9A is Ll.

When printing is started, a signal is emitted by the eccentric cam motion sensor or other means to emit a read mark pulse each time a read mark passes 11- under the read mark sensor 21. As the roll 1 progresses, the starting mark IO is reached as shown in Figure 1 (1)).
When A reaches the position of the starting mark sensor 20 and is sensed, counting of read mark pulses is started. In this case, the first small section 4C, where the actual printing was first performed, has not yet reached the code checking means 19 and is located a distance Lx in front. As is clear from the figure, this Lx is L = L, -L2 (1).

Therefore, the code checking means 1 and the reading mark sensor 21
The distance between you and me. Therefore, the distance L5 from the reading mark sensor 21 to the reading mark 8A is L5=LX, and the positional relationship between the subdivision, the reading mark, and the starting mark within the range of L5 is determined by the code checking means 19. Small plot 9
The state is exactly the same as in the range of LX between A and A. Therefore, the read mark 8A is detected by the read mark sensor 21.
At the same time, the small section 4C, on which the initial printing of 12- has been made, reaches immediately below the code checking means 19. Therefore, after the starting mark sensor 20 senses the starting mark, the reading mark sensor detects the number of reading marks included in the range L5, that is, the number of reading marks included in the range Lx (=L, -L2) downstream from the reading mark 9A. If the code inspection means 19 is activated to start the code inspection when the number of reading marks NX (six in this figure) is counted, the inspection will surely start from the printed surface that was first printed by the actual printing. It goes wrong.

The starting mark sensor 20 may be located upstream of the code checking means 19. In that case, the distance L2 will be a negative value.

That is, in this case, LX=Ll +lL21 (2), and the number of reading marks included in the range of LX downstream from the reading mark 9A is NX.

In addition, the number of reading marks included between the above Lx
Nx may be determined by counting the number of reading marks that fall within the range of LX in the 13- state shown in FIG. 1(b) on the actual item.

An example of an electric circuit that performs the above operation is shown in FIG. 3, and its output state is shown in FIG. 4.

The electric signal a obtained from the sensor 23 that detects the operation of the eccentric cam for advancing the type wheel of the first printing cylinder 16 is combined with the electric signal a from the starting mark sensor 20 that detects the starting mark and the AND gate 26. The output signal is input to the 7-lip, 70-tub circuit 27.

The output signal d is input to the AND date 28 together with the electric signal C from the reading mark sensor 21, the output signal e is input to the counter 29, the output signal is input to the 7-lip 70-tub circuit 30, and the output signal f is input to the AND gate 31 together with the signal C from the reading mark sensor 21, and its output signal g is supplied to a strobe device to cause it to emit light and illuminate the printed surface of the web 1 for inspection. 33 is a controller.

At the start of actual printing, the signal a from the sensor 23 is activated by the cam movement on the first printing cylinder 16.
The signal rises to the H level at time t1), and the starting mark sensor 20 further generates a pulse signal at time L2. That is, at time t2, the output signal d of the flip-flop circuit 27
rises to H level.

Thereafter, the output pulse C from the reading mark sensor 21 is supplied via the AND date 28 as a pulse e to a counter 29, where it is counted. When the pulses are counted by a predetermined number N, the counter 29 generates an output signal and supplies it to the flip-flop circuit 30. The output signal f of the flip-flop circuit 30 is at this point
It rises to H level at t3 (1), and the output pulse C of the reading mark sensor 21 is supplied to the strobe device 32 via the AND gate 31 as an output signal g.
(Therefore, the strobe device emits light in synchronization with pulse C).

A code inspection means 19 reads the code on the printed surface in synchronization with the light emission of the strobe device. The video signal of the code is sent to a testing unit 22, such as a computer, and compared with the electrical signal of the corresponding standard code, and the test results are displayed or printed on a display, printer, alarm, or the like. When the test is completed, the flip-flop circuits 27 and 30 and the counter 29 are reset by control signals from the controller 33, respectively.

When the code is inspected in this way, if the web 1 meanders in the lateral direction or the web 1 itself expands or contracts in the transport direction, and the code 38 deviates from the limit frame 39, the amount of deviation is detected. , the X table 35, the Y table 36, or both are operated according to the amount of deviation, and the code 38 is captured again within the limit frame 39, ensuring reliable inspection and preventing erroneous judgments and missing measurements. .

Since the imaging range 37 is wider than the limit frame 39, even if the code 38 protrudes from the limit frame 39, the inspection will be performed normally, and the limit frame 39 will immediately follow the code 38 due to the deviation signal. Therefore, normal tests can always be performed.

In the above embodiment, only the detection means 16-42 of the code inspection means 19 is in the X direction (the direction in which the web is transported) and in the Y direction (the
In this example, the detection means 4 moves in the direction perpendicular to the
2 and the reading mark sensor 21 may be moved.

For example, the detection means 42 may be moved in the Y direction, and the reading mark sensor 21 may be moved in the X direction using a motor such as a pulse motor and a mechanism such as a screw mechanism to perform relative movement.

FIG. 9 shows another embodiment, in which reading marks and starting marks are not printed on the web 1, but corresponding reading marks 43, 44, 45.4 G are printed.

47, 48 and a starting mark 49 are provided to rotate in synchronization with the printing cylinder 50.

When reading marks or starting marks are printed directly on the roll 1 as in the above-described embodiment, the number of pulses may be counted incorrectly if the roll 1 is missing paper or the marks are poorly printed. Therefore, in order to prevent this, a starting mark and a reading mark are provided to synchronize with the printing cylinder 50.

17- The starting mark, reading mark, starting mark detection means, and reading mark detection means will be explained.

In FIGS. 10 and 11, 50 is a printing cylinder, which is rotated by a rotating shaft 51 and prints a code on the web 1 between it and the printing cylinder 18. In FIGS.

Reference numerals 52 and 53 denote a first rotary plate and a second rotary plate that are fixed to the rotary shaft 51 and rotate in synchronization with the printing cylinder 50, and the first rotary plate 52 has a reading 1) mark (see Fig. 12). ), but a starting mark (see FIG. 12) is attached to the second rotary plate 53.

FIG. 12 shows a printing cylinder 50, a first rotating plate 52, and a second rotating plate 53.
This is a developed view of the sheet viewed from the inside, and is developed to the left from the point in contact with the web 1 in FIG. 11, where the -circumference is equal to the sheet length.

4 C, 5C, 6C... indicate small sections of printing, 54
', 55', 56', 57', 5B', 59
' is a developed image (this is called a virtual code printing plate) of code printing plates 54.5 B, 57, 58.59 (Fig. 13) for printing codes for each small section, and this 18
- a first rotary plate 52'' in a position synchronized with the code stamp plate;
As shown in FIG. 13, reading marks 43, 44°, 45.
4G, 47.48 are provided. 43'.

44', 45', 4B', 47', and 48' are developed images of these reading marks, which are called virtual reading marks.

Furthermore, there is a starting mark 4 at the position on the second rotary plate 53.
9 is attached. 49' is its expanded image, which is called a virtual starting mark.

Reading marks 43, 44... The starting mark 49 is a mark that utilizes different reflectance, such as a black and white mark, or a mark that utilizes transmitted light, such as a slit, and uses an optical sensor such as a photocell as a sensor. ,
Alternatively, a mark using unevenness or a mark using a magnetic material, and a mark using an electric or electromagnetic sensor as a sensor, etc. are applied.

eo and e+ are referred to as reference lines.

The developed pattern shown by the solid line in FIG.
As 0 rotates counterclockwise, it gradually moves 19- to the right. And when I turned exactly once, the seat length was visible outside. 5 D shifted to the right and indicated by a two-dot chain line
In other words, the pattern 50'' is the current position of the pattern before rotation of the current pattern 50'. When considering the current virtual development pattern (for example, the virtual printing cylinder 50', the virtual first rotating plate 52', and the virtual second rotating plate 53'),
- The current state of the pattern before rotation is represented by the virtual printing drum 50'',
They will be referred to as a virtual first rotating plate 52'' and a virtual second rotating plate 53''.

The ones before two rotations will be written as 50'', 52'', 53'', etc.

However, 43', 43'', 44', 44'', 45'
.

45'', 4G', 46'', 47', 47'', 4B'
.

48'' is called a virtual reading mark, and 49' and 49'' are called virtual starting marks.

These virtual marks are virtual read j) marks 43'
, 44', 43'', 44''... appear to be marks virtually printed on the web 1 in synchronization with the reading marks 43, 44..., and the virtual 20-starting marks 49', 49 ” is a mark virtually printed on the web 1 in synchronization with the starting mark 49.

FIG. 13 schematically shows the relationship among the printing cylinder 50, code printing plates 54, 55,..., reading marks 43, 44,..., starting mark 49, reading mark sensor 21, and starting mark sensor 20. . In this case, it is assumed that the printing cylinder 50 prints all codes in -.

20 is a virtual starting mark sensor, 21' is a virtual reading mark sensor, and the starting mark sensor 20 and the reading mark sensor 21 are assumed to be in the expanded position in the transport direction of the web 1.

If the radius of the printing cylinder 50 and the first and second rotary plates 52.53 is R, then L, 2 R・θ2 Lo=R・θ.

It becomes I-o-2πR. LR, Lo. Smaller dimensions are preferred.

21- The distance between the printing cylinder 50 and the code checking means 19 is assumed to be L3.

By setting Lo<I-o, the virtual starting mark sensor 20' is placed on the "normally 2nd part" side of the code checking means 19. Therefore, unlike the case of the above equation (1), the virtual starting mark If the sensor 20' is in the second position than the code checking means 19, sL is set to be >0.

Here, ■-2=1-,, -1-.

L-=Ls I-R becomes.

L is preferably an integral multiple of the sheet length L.

Returning to FIG. 9 again, the operation will be explained.

Here, C) 3A and 3B are trial prints, and C)
It is assumed that the actual printing starts from 3C. And Figure 9 (a
) shows the state at the moment when the first actual printing is performed on the row of the first small section 4C of sheet) 3C by the printing cylinder 50 as a printing means.

22-For convenience of explanation below, the relationship between the virtual sensor and the virtual mark will be explained. In reality, detection is performed between the corresponding sensor and the mark, and a signal is emitted.

The virtual starting mark on the first stream side is 49', which is closest to the virtual starting mark sensor 20' as the virtual starting mark detection means, outside of the moment 1, and is the closest to the virtual starting mark sensor 20' as the virtual starting mark detection means. The distance between the reading marker 243 is Ll
It is.

When the actual printing is started, a signal is emitted by the eccentric cam movement sensor or other means to move the virtual read marks 48'', 43' below the virtual read mark sensor 21'.
, 44', . . . emits a read mark pulse every time it passes. As the roll 1 progresses, as shown in Fig. 9 (1).
) When the virtual starting mark 49'' reaches the position of the virtual starting mark sensor 20' and is sensed, reading 1) starts counting mark pulses. The subdivision 4C has not yet reached the code checking means 19 and is a distance Lx in front of it.As is clear from the figure, this LX is 23-LX2L, +1-2 (3).

Since the distance between the code inspection means 19 and the virtual reading mark sensor 21' is set equal to 1 ml-s, the virtual reading 1) mark (1) in the previous pattern from the mark sensor 21' 43) Distance to 1. is L5=1-.

Therefore, the positional relationship among the subdivisions, virtual reading marks, and virtual starting marks in the range 1-9 is exactly the same as in the range 14 between the code checking means 19 and the subdivision 4C. Therefore, at the same time that the virtual read mark (43) reaches the virtual read mark sensor 21', the small section 4C on which the first actual printing has been performed reaches directly below the code checking means 19. Therefore, after the virtual starting mark is sensed by the virtual starting mark sensor 20', the virtual reading mark sensor 21' detects the number of reading marks included in the range L5, that is, from the virtual reading mark 43' downstream to Lx (''
Virtual reading marks 24-1) Number of marks 44'' to 48'' Nx (six in this figure) included in the range of virtual reading marks 44' to (43)
By activating the code inspection means 19 and starting the code inspection when the count has been made by the six items listed above, it is possible to reliably start the inspection from the first printing surface printed in the actual printing.

In addition, the number of reading marks included between the above Lx
NX is LX in the state shown in Figure 9 (1) in the actual product.
You can also count the number of reading marks that fall within the range.

In this embodiment as well, the code checking means 19 is constructed and operates as shown in FIGS. The code does not deviate from the imaging range 37, and reliable inspection can be performed at all times.

Further, as in the above example, the detection means 42 of the code inspection means 19 moves only in the Y direction, and moves the virtual reading mark sensor 21' in the - It may be moved in the circumferential direction or tangential direction by a combination of a pulse motor and a screw mechanism.

In the above embodiment, the code checking means 19 and the reading mark sensor 21 or the virtual reading mark sensor 21'
The distance L4 from the first rotary plate 52 is not necessarily limited to the read mark force tl-8 or if the circumference of the first rotary plate 52 is equally divided (for example, divided into n equal parts). It does not have to be equal to L, = m/n Lo (m is an integer). However, it is desirable that m>n.

According to the present invention, it is possible to provide a highly reliable method and device for inspecting printed matter by always reliably capturing the code within the imaging range and performing reliable inspection even if the paper roll expands, contracts, or meanders. However, it has an extremely large practical effect.

26-

[Brief explanation of drawings]

The drawings relate to embodiments of the present invention, and FIGS. 1(a) and (1)) show the printing means, code checking means, starting mark sensor, reading mark sensor, printing surface of the web, starting mark, and reading mark. An explanatory diagram showing relative positions, FIG. 2 is a 70-diagram of the entire device, FIG. 3 is an electric circuit diagram, FIG. 4 is a diagram showing the output state, and FIG. 5 is a front view of the code inspection means. FIG. 6 is a side view thereof, FIGS. 7 and 8 are explanatory diagrams of the imaging range, and FIGS. 9 (a) and (1)) show another embodiment of printing means, code inspection means, starting mark sensor, An explanatory diagram showing the relative positions of the reading mark sensor, the printing surface of the web, the starting mark, and the reading mark. Fig. 10 is a plan view of the printing cylinder, Fig. 11 is its front view, and Fig. 12 is the printing cylinder, the first and second FIG. 13, which is a developed view of the second rotary plate seen from the inside, is an explanatory diagram schematically showing the relative relationships among the sensor, mark, printing plate, virtual sensor, and code inspection means. 1... Roll paper, 2... Arrow, 3A, 3B, 3C... Sheet, 4A, 4B, 4C... Small section, 4C' 27- - Code, 5 A, 5 B, 5 C... Small section, 5C
'...Sign, EiA, EiB, 6C...Subdivision, ec
'...Sign, 7A, 7B, 7C, 8A, 8B, 8C,
9A, 9B. 9C...reading mark, I OA, I OB, ID
C...Starting mark, 11 feeder, 12...Roll, 1
3.14... Design printing unit, 15... Number printing unit, 16... First printing cylinder, 17... Second printing cylinder, 18...
Impression cylinder, 19... Code inspection means, 2°... Starting mark sensor, 20'... Virtual starting mark sensor, 21... Reading mark sensor, 21'... Virtual reading mark sensor, 22... Inspection unit, 23 ...Sensor, 24...
Cutter unit, 25: Stacker, 26: AND gate, 27: Flip-flop circuit, 28: AND date, 29: Counter, 30: Flip-flop circuit, 31: AND date, 32: Strobe device , 33...controller, 34...frame, 35
...X table, 36...Y table, 37...imaging range, 38...code, 39...limit frame, 40.41...motor, 42...detection means, 43, 44, 45, 46, 47. 48・Reading mark, (43), 43', 43", 43". 44', 44'', 45', 45'', 46', 46
". 47', 47", 48', 4 B"...virtual reading mark, 49...starting mark, 49', 49". 49''...virtual starting mark, 50...print cylinder, 5o'. 50''...virtual print cylinder, 51...rotation axis, 52...first rotating plate, 52', 52"...virtual first rotation Board, 53...
Second rotating plate, 53', 53''...virtual second rotating plate, 54
,55.5 G,57,58.59...sign plate, 54
', 55', 5B', 57', 5B'. 59'...Virtual code stamp plate, 60.61...Reference line. Patent Applicant Kyodo Printing Co., Ltd. Representative Patent Attorney Tadashi Takagi 1) Minoru Takao Maruyama 29- Figure 6 J5 = 39 38 'l' / Figure 93

Claims (1)

[Claims] 1. A printed matter inspection method for inspecting the quality of codes printed in a large number of small sections that are repeatedly distributed with the same pitch distribution for each sheet of a certain sheet length in the operator's direction of the paper roll. The code is inspected based on a signal obtained by optically detecting the code, the optical detection is carried out within an imaging range that is fixed relative to the detection means, and the code to be inspected is inspected. detecting the amount of deviation from the limit frame when a part of the image sensor deviates from the limit frame provided within the imaging range;
A method for inspecting printed matter, characterized in that the detecting means is moved in accordance with the amount of deviation, and the code to be inspected is captured again within the limit frame to inspect the code. 2. A constant sheet length in the direction of the winding paper. In the printed matter inspection method for inspecting the quality of codes printed in each of a large number of small sections that are repeatedly distributed with the same pitch distribution for each sheet of paper,
A reading mark indicating the position of the small section is attached to each of the sheets so as to correspond to the code printed on the small section and has the same pitch distribution once, and one pulse is applied to each of the sheets. Place the starting mark for counting on the sheet length. The reading marks are placed at a pitch equal to the length of the sheet from the code inspection means. A reading mark pulse is emitted each time the reading mark detection means located at a position an integral multiple of the distance is detected, and when the printing means starts printing the code, the starting mark is detected after the actual printing process has started. The means detects and starts counting the reading mark pulses, and when a predetermined number N of pulses is reached, the code inspection means starts the code inspection, and starts the code inspection from the code printed by the actual printing. 2- In a printed matter inspection method for inspecting the quality of codes printed in a large number of small sections that are repeatedly distributed with the same pitch distribution for each sheet of a certain sheet length in the operator direction of the web, The inspection is carried out based on a signal obtained by optically detecting the code, the optical detection is carried out within an imaging range fixed relative to the detection means, and the part of the code to be inspected is When the mark does not deviate from the eye field frame provided within the imaging range, the amount of deviation from the eye field frame is detected, and the detection means and the reading mark detection means are relative to each other in accordance with the amount of deviation. 1. A method for inspecting a printed matter, characterized in that the code is inspected by performing a relative movement to move the position of the code, and capturing the code to be inspected again within the limit frame. 3. The relative movement is performed by movement of the reading mark detection means along the X direction, which is the transport direction of the web, and movement of the detection means along the Y direction perpendicular to the X direction. = The method according to claim 2. 4. In a printed matter inspection device that inspects the quality of codes printed in a large number of small sections that are repeatedly distributed with the same pitch distribution for each sheet of a certain sheet length in the longitudinal direction of the web, the web is transported. The apparatus comprises a transport means, a printing means for printing a code on each of the small sections, and a code inspection means for inspecting the quality of the printed code, and the code inspection means includes an inspection camera and the inspection camera 1). A determining means for determining the quality of the obtained code image by pattern recognition, a moving means for moving the inspection camera in a plane parallel to the printing surface, and a limit frame provided within the imaging range of the inspection camera. and a deviation amount detection means for detecting the amount of deviation of the code to be inspected, and the inspection camera is moved by the moving means in response to a signal of the deviation amount from the deviation amount detection means, and the inspection camera is moved by the moving means, A printed matter inspection apparatus characterized in that a code is placed within the limit frame of the inspection camera. =4-