JP2570540B2 - Monitoring equipment for double-sided printed matter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for monitoring the misregistration of a double-sided multi-color printing press in which printing positions of both sides are required to be coincident with each other in a printing process, such as a business form.

[0002]

2. Description of the Related Art A method of monitoring a printed state of a printed matter as a still image while running is a method of rotating a reflecting mirror in synchronization with a running speed of the printed matter, a method using a one-dimensional image sensor and an image memory, an instantaneous method, and the like. There is a method using a flash that emits light, a television camera, and an image memory.

[0003] Many printed materials are printed on the front and back sides, and are often printed simultaneously on the front and back sides. In this case, the front and back are simultaneously displayed on the monitoring screen for monitoring.

FIG. 1 shows an arrangement of a television camera for monitoring a printed material having a punched hole, and images of the front and back surfaces of the printed material captured by each television camera. When viewed from the front camera, the punch holes are located on the right side, but when viewed from the rear camera, the punch holes are on the left side. The directions of the gear side and the man side are opposite between the front and the back. Here, the man side is one side of the printing paper when the printing paper is set in the printing press, for example, the left side when viewed from the surface, and the gear side is the other side, that is, the right side when viewed from the surface.

[0005]

FIG. 2 shows an image obtained by synthesizing the images of the respective television cameras and displaying an image of the front surface at the top of the screen and an image of the back surface at the bottom. As can be seen from the fact that the directions of the punch holes do not match, the direction of the gear side and the man side do not match in this image, so it is difficult to intuitively grasp the state of misregistration, and it is corrected to the gear side I am confused as to whether to do it or to fix it to the manside.

On the other hand, in FIG. 3, only the back side is reversed left and right and the front and back sides are displayed on the same screen. In this image, since the direction of the gear side and the direction of the man side coincide with each other, it is possible to intuitively grasp the state of misregistration, such as the man side on the left, and quickly take appropriate measures.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. When simultaneously monitoring both sides of a printed material printed on both sides simultaneously, the gear side and the man side are displayed on the screen in a right and left reversed manner. Another object of the present invention is to provide a double-sided printed matter monitoring device that prevents an operator from being confused when dealing with troubles such as misregistration.

[0008]

An image detector is provided on each of the front side and the back side of a double-sided printed matter, and in a monitoring apparatus for double-sided printed matter which displays the outputs of the two image detectors on a monitoring screen, the image detection provided on the back side is provided. A reversing device for input or output of a container is provided so that the right side of the double-sided printed matter viewed from the front side and the left side of the double-sided printed matter viewed from the back side are displayed on the same side on the monitoring screen.

Further, a reflection mirror or a prism is provided in front of the image detector as an input inverting device of the image detector.

The output of the image detector is stored in a backside image memory as an output inversion device of the image detector.
At the time of reading, the horizontal address is read in reverse to the storage.

Further, as an output reversing device of the image detector, the left and right scanning directions on the image sensor of the image detector are reversed from the left and right scanning directions on the image sensor of the image detector provided on the surface. To do.

As an output inverting device of the image detector, the image detector is mounted upside down, and the output of the image detector is stored in the backside image memory. At the time of reading, the vertical address is inverted and read at the time of storage. To do.

As an output reversing device for the image detector, the image detector is mounted upside down, and the running direction of the image detector on the image pickup device is reversed upside down.

[0014]

According to the above arrangement, the input of the image detector provided on the rear surface is optically inverted left and right and input, or the input data of the image detector is converted into the electrically inverted right and left data and the data is input to the front surface. By combining the output with the output of the provided image detector, an image in which the directions of the gear side and the man side match on both sides as shown in FIG. 3 is obtained.

As a method of optically inverting the output of the image detector to the left or right, light from the object is input through a reflecting mirror or a prism while the input image is inverted left and right.

The output of the image detector is stored in the back side image memory, and the horizontal address is read from the side opposite to the horizontal address at the time of reading, so that an image which is inverted left and right can be obtained as an output image.

Further, when the scanning direction in the left and right direction on the imaging device of the back image detector is reversed from the left and right scanning direction on the imaging device of the image detector provided on the front surface, the left and right of the output image is Reverse.

Further, when the backside image detector is installed upside down, the output of this image detector is stored in the backside image memory, and when the vertical address is read out at the time of reading at the time of reading, the image which has been turned left and right is obtained. Is obtained.

When the backside image detector is installed upside down and the image sensor of this image detector is output with the upside-down scanning direction reversed, a left-right inverted image is obtained.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 4 is a perspective view for explaining the first embodiment of the present invention. The object 1 is a coffee cup having one handle for easy understanding. The image of the coffee cup 1 is input to the television camera 2 used as an image detector in a manner that the image of the coffee cup 1 is inverted left and right by the reflecting mirror 4, and is displayed on the monitoring screen 3.
That is, the handle of the coffee cup 1 appears on the left side when viewed from the position of the reflecting mirror 4, but the handle is displayed on the right side of the television monitor 3. The same effect can be obtained by using a prism instead of the reflecting mirror 4.

FIG. 5 is a block diagram showing the configuration of the second embodiment. The present embodiment is a continuous monitoring apparatus using two sets of flashes 6, a television camera 2, and image memories 21 and 22 for the front and back sides. The output pulse of the encoder 5 rotating in synchronization with the running of the printed matter 1 is counted and counted by the timing control unit 20.
By performing the calculation, an emission pulse is given to the flash 6 so that the flash is emitted at the moment when a predetermined portion on the printing surface is positioned in the field of view of the television camera 2.

The television camera 2 outputs the image signal obtained at that moment to the image memories 21 and 22. At the same time, the timing control unit 20 gives an image storage command to the image memories 21 and 22. Image memory 2 as a still image
It is formed into 1,22. The above operation is performed for each of the front and back surfaces. A normal address A is output from the address counter 23 to the front side image memory 21 and a normal still image C is output, and a left / right inverted address B is output to the back side image memory 22 and a left / right inverted still image D is output.
The two still images are combined by the image combining unit 24, and a display is provided so that the misregistration can be intuitively grasped.

FIG. 6 is a block diagram showing the configuration of the third embodiment. The present embodiment is a continuous monitoring apparatus using two sets of one-dimensional image sensors 2 for front and back and image memories 21 and 22 as image detectors. The output pulse of the encoder 5 rotating in synchronization with the running of the printed matter 1 is output to the timing control unit 20.
In step (1), a driving signal having a frequency at which a one-dimensional image signal capable of forming a two-dimensional image can be obtained while maintaining an appropriate aspect ratio is provided to the one-dimensional image sensor 2.

At the same time that the one-dimensional image sensor 2 outputs a one-dimensional image signal to the image memories 21 and 22, an image storage command is issued from the timing controller 20 so that an image at a predetermined position on the printing surface can be obtained. An image at a predetermined position is formed in the image memories 21 and 22 as a two-dimensional still image while maintaining an appropriate aspect ratio. The above operation is performed for each of the front and back surfaces. Address counter
23 outputs a normal address A to the front side image memory 21 to output a normal still image C, and outputs a left / right inverted address B to the back side image memory 22 to output a left / right inverted still image D.
Is output, and the two still images are combined by the image combining unit 24, and a display is provided so that the misregistration can be grasped intuitively.

FIGS. 7 and 8 are diagrams for explaining the operation of the image inverting unit 23 used in the second and third embodiments shown in FIGS. The address (address) of each pixel in the image memory when writing (storing) an image in the image memory usually coincides with the address of each pixel in the image memory when reading (outputting) from the image memory. Inverts an image by inverting either writing or reading.

FIG. 7 shows an example of addressing (addressing) an image of 2 ⁿ × 2 ^k pixels, in which horizontal addresses are addressed from left to right and vertical addresses are addressed from top to bottom. FIG. 8 is obtained by inverting only the horizontal addressing, and the image is horizontally inverted. By writing the image into the image memory at the address as shown in FIG. 7 and reading it out from the image memory at the address as shown in FIG. 8, the image can be inverted horizontally.

FIGS. 9 and 10 are perspective views for explaining the fourth embodiment. In this embodiment, the image is inverted by reversing the scanning direction on the image sensor 7 of the television camera as an image detector. FIG. 9 shows a normal imaging state without inversion. The handle of the target coffee cup 1 is on the left side when viewed from the television camera 2, and the pixels of the coffee cup 1 with the handle on the left side are displayed on the television monitor 3 as a matter of course. Since the image is formed on the image pickup surface of the image pickup device 7 of the television camera 2 by inverting the image vertically and horizontally by the lens, the image is scanned in the scanning direction as indicated by 8 on the image pickup side and in the scan direction as indicated by 9 on the display side.

FIG. 10 shows an imaging state in which the left and right are reversed. When viewed from the television camera 2, the handle of the coffee cup 1 as the opposite object is on the left side. Therefore, the image of the coffee cup 1 with the handle on the right side is displayed on the television monitor 3 with the left and right reversed. Image sensor 7 of TV camera 2
As shown in FIG. 10, the right and left scanning directions are set opposite to those in the case of 8. There is also a method of reversing the scanning direction on the display side.

Next, a fifth embodiment will be described. In this embodiment, the TV camera 2 for the back side is mounted upside down, and FIGS.
By reading the vertical address upside down in the backside image memory 22 shown in FIG.

FIG. 11 shows the state of the image stored in the back side image memory 22. Since the television camera 2 is turned upside down, upside down and left and right images are stored.

FIG. 12 is a diagram schematically showing a state in which the vertical address is read upside down from the back side image memory 22.
Since the vertical address is turned upside down, the image is turned upside down. However, since the left and right sides are the same, the handle remains at the right, and as a result, the left and right sides are reversed.

Next, a sixth embodiment will be described. In the present embodiment, the TV camera for the back side is mounted upside down, and the scanning direction on the image sensor 7 shown in FIG.

FIG. 13 is a diagram showing the scanning direction on the image pickup device and the scanning direction on the television monitor 3 when the back side television camera 2 is installed upside down. On the TV monitor 3, the coffee cup 1 is the image viewed from the TV camera 2 direction and up and down,
Left and right are reversed.

FIG. 14 shows the scanning direction 12 on the image sensor shown in FIG.
Indicates the same direction. By doing so, an image inverted only in the left-right direction is obtained on the television monitor 3.

[0035]

As is apparent from the above description, the present invention can facilitate the print monitoring operation by inverting the input or output of the rear side television camera and displaying it on the television monitor.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a state in which a double-sided printed matter is imaged by a television camera from both sides.

FIG. 2 is a diagram illustrating a case where an image captured by the device illustrated in FIG. 2 is displayed on the same television monitor.

FIG. 3 is a diagram in which the image of the television camera on the back surface is displayed on the same television monitor by inverting left and right.

FIG. 4 is a perspective view showing a first embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a second embodiment.

FIG. 6 is a block diagram showing a configuration of a third embodiment.

FIG. 7 is a diagram schematically illustrating a storage state in a back image memory in the second and third embodiments.

8 is a diagram schematically showing a case where the storage state shown in FIG. 7 is reversed left and right.

FIG. 9 is a diagram illustrating an image of a television camera on the back surface of the fourth embodiment.

FIG. 10 is a diagram illustrating a case where the image of the television camera on the back surface of the fourth embodiment is reversed left and right.

FIG. 11 is a diagram schematically illustrating a storage state in a back image memory according to a fifth embodiment.

12 is a diagram schematically showing a case where the storage state shown in FIG. 11 is inverted upside down.

FIG. 13 is a diagram illustrating an image of a television camera on the back surface of the sixth embodiment.

FIG. 14 is an explanatory diagram in which the vertical scanning direction on the image sensor is reversed in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Object, printed matter, coffee cup 2 Image detector, TV camera, 1-dimensional image sensor 3 TV monitor 4 Reflector 5 Encoder 6 Flash 7 Image sensor 20 Timing control unit 21 Front side image memory 22 Back side image memory 23 Image inverting unit 24 Image synthesis unit

Claims (6)

(57) [Claims] An image detector is provided on each of a front side and a back side of a double-sided printed matter, and an output of the two sided printed matter is displayed on a monitoring screen. A double-sided printed matter monitoring device, wherein an output reversing device is provided, and the right side of the double-sided printed matter as viewed from the front side and the left side of the double-sided printed matter as viewed from the back side are displayed on the same side on the monitoring screen. . 2. The double-sided printed matter monitoring device according to claim 1, wherein a reflection mirror or a prism is provided in front of the image detector as an input inverting device of the image detector. 3. An output reversing device of the image detector, wherein an output of the image detector is stored in a backside image memory, and a horizontal address is read out at the time of reading out by inverting the horizontal address at the time of storing. Item 2. The double-sided printed matter monitoring device according to Item 1. 4. An output reversing device for the image detector, wherein the left and right scanning directions on the image sensor of the image detector are reversed from the left and right scanning directions on the image sensor of the image detector provided on the surface. The apparatus for monitoring double-sided printed matter according to claim 1, wherein: 5. An image reversing device for the image detector, wherein the image detector is mounted upside down, the output of the image detector is stored in a backside image memory, and the vertical address is inverted at the time of reading when the image is stored. 2. The double-sided printed matter monitoring apparatus according to claim 1, wherein the apparatus is configured to read the data. 6. An image reversing device for the image detector, wherein the image detector is mounted upside down, and a running direction of the image detector on the image sensor is turned upside down. Monitoring equipment for double-sided prints.