JPH04316664A - Device for monitoring bad finishing phenomenon of web - Google Patents

Abstract

PURPOSE:To readily and safely monitor and check phenomenon of bad finish such as slippage of traveling web pattern even not by a skilled worker. CONSTITUTION:In monitoring phenomenon of bad finish such as slippage of pattern of traveling web 1, a device for monitoring bad monitoring phenomenon of web is equipped with a CCD camera 5 which is arranged opposingly to the web 1, supported on a carriage 7 and photographs the surface of the web 1, a traverse device 6 of reciprocating the carriage 7 in the width direction of the web 1, a TV monitor 14, an image pick-up memory taking out device 13 which is connected to the CCD camera 5 and the TV monitor 14, memorizes the image pick-up of the CCD camera 5, takes out the image pick-up at an arbitrary timing as a still picture and reproduces the image pick-up in the TV monitor 14, a light source 20 such as a halogen lamp and an irradiating head 18 which is supported on the carriate 7, connected through an optical fiber 19 to the light source and irradiates a photographed position of the web 1 in spot.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] This invention is applicable to a roller printing machine that prints designs on a web made of cloth, for example. This invention relates to a web failure phenomenon monitoring device for monitoring and checking phenomena.

0002

[Prior art and its problems] In a roller printing machine, a web made of cloth is continuously fed and run, and various designs are printed continuously, but in the case of designs in multiple colors, it is difficult to print accurately. There is no guarantee that the pattern will match. Therefore, when a pattern is being printed on the web, the moving web is constantly monitored for deviations in the pattern, and checks are made to see if the patterns are aligned accurately. It is necessary to correct it by alignment equipment. However, in the past, there were problems associated with the difficulty. Until now, workers had to climb up onto the roller printing machine and visually monitor and check for misalignment of designs on the web, but the running speed of the web was quite high. Normally, 50-70m/
The web is fed and runs at a speed of min. Its running speed can reach 230 m/min. Also,
Various dyes and pigments are used as printing paste for designs, and 10
Designs may also be printed using colored dyes or pigments. For this reason, it was not easy to check whether the patterns were matched accurately and to correct any misalignment of the patterns using a pattern matching device, and only an experienced person could do this. . Particularly, when discharging webs with dark background colors such as black, dark blue, and navy blue, the printed dye does not stand out clearly and it is extremely difficult to discern misalignment of designs. For this reason, I have to run up to the top of the roller printing machine many times, check the pattern deviation on the web from a close distance of 15 cm to 20 cm, and operate the pattern matching device many times. The work of running up to the top of the aircraft was extremely dangerous.

[0003] In addition, the web printed by the roller printing machine is constantly monitored not only for pattern deviations but also for non-printing phenomena such as color stains, doctor scratches, uneven printing, and non-adhesion of the web. Need to check. The same applies to webs printed by other types of printing machines. Furthermore, even in printing machines that print designs on webs made of paper, plastic films, or thin metal plates, when designs are printed on the web, it is necessary to constantly monitor and check for non-printing phenomena such as misalignment of the designs.

0004

[Object of the Invention] Therefore, the present invention solves the above-mentioned conventional problems, and enables even non-experts to easily and safely monitor and check for unraised phenomena such as misalignment of patterns on a running web. This was done to make it possible.

[0005]

According to the present invention, a CCD camera is disposed to face a web, supported by a carriage,
The surface of the web is photographed by the D camera. moreover,
The carriage is operated by a traverse device, and the carriage reciprocates in the width direction of the web. Therefore, C.C.D.
The camera moves back and forth integrally with the carriage, and the surface of the web is scanned by the CCD camera. Furthermore, an image capture memory retrieval device is connected to the CCD camera and the TV monitor, and the image captured by the CCD camera is stored by the image capture memory retrieval device, which is retrieved as a still image at an arbitrary timing and reproduced on the TV monitor. In addition, a light source such as a halogen lamp is used to spot-irradiate the photographed part of the web, and the irradiation head is supported by a carriage, and the light source and the irradiation head are connected by an optical fiber, and the irradiation head illuminates the photographed part of the web. Spot irradiated.

[0006] When the web is cloth and a design is printed by a roller printing machine, it is also possible to monitor and check for non-printing phenomena such as misalignment of the design using the apparatus according to the present invention.

[0007]

[Description of Embodiments] Embodiments of the present invention will be described below.

[0008] In FIG. 1, this device is a non-printing phenomenon monitoring device for a roller textile printing machine, and is used to monitor deviations in patterns on a running web 1. As is well known, in a roller printing machine, a web 1 made of cloth is sent between a pressure ball 2 and an engraving roller 3, runs, and a pattern is printed by the pressure ball 2 and the engraving roller 3. Thereafter, the web 1 with the pattern printed thereon passes through a guide roller 4 and is sent to a position for the next process.

As shown in FIG. 2, this device has a CCD camera 5 and a traverse device 6. The CCD camera 5 is for photographing the surface of the web 1, and is installed near the guide roller 4. is placed to face the
It is supported by a carriage 7. The carriage 7 is engaged with and slidably guided by a guide rail 8, which is arranged parallel to the web 1 and extends in its width direction. The traverse device 6 is for reciprocating the carriage 7, and is composed of a feed screw 9. The feed screw 9 is arranged parallel to the guide rail 8, supported by a frame 10, and rotatably guided. are screwed together. Further, a motor 11 and a belt 12 are connected to the feed screw 9. Therefore, the feed screw 9 can be rotated by the motor 11 and the belt 12, and the carriage 7 can be fed by the feed screw 9.
can be moved back and forth in the width direction of the web 1.

Furthermore, this device has an image capture memory retrieval device 13 and a TV monitor 14. The image capture memory retrieval device 13 is for storing and retrieving images captured by the CCD camera 5. It is connected. The CCD camera 5 and the image storage retrieval device 13 are well known per se, and the image storage retrieval device 13 can also provide an ultra-high speed electronic shutter function of up to 1/500,000 seconds. Further, a high-resolution digital frame memory corresponding to the number of CCD solid-state image sensors of the CCD camera 5 is built into the image capture memory retrieval device 13, and the image captured by the CCD camera 5 is stored and stored by the image capture memory retrieval device 13. It can be taken out as a still image at any timing and reproduced on the TV monitor 14. The image storage retrieval device 13 is commonly called an image freezer.

In addition, the zoom lens control device 15
It is connected to the D camera 5, and the C
By controlling the zoom lens of the CD camera 5, it is possible to reduce and enlarge the photographed portion of the web 1. A traverse control panel 16 is connected to the motor 11, and the speed and distance of movement of the carriage 7 and CCD camera 5 can also be controlled by the control panel 16.

[0012] CCD camera 5, image capture memory retrieval device 1
3 and the zoom lens control device 15 are connected by a cable 17.

Furthermore, this device includes a pair of irradiation heads 18.
has. The irradiation head 18 is for spot irradiating a photographed part of the web 1, and is disposed on both sides of the CCD camera 5, supported by a carriage 7, and connected to a light source 20 via an optical fiber 19. The light source 20 consists of a halogen lamp. Therefore, the light from the light source 20 is transmitted to the optical fiber 1.
9 and is guided to the irradiation head 18, where the photographed location of the web 1 is spot irradiated from both sides of the CCD camera 5. Therefore, no shadow is formed on the irradiated area of the web 1, and the area can be photographed clearly.

Furthermore, the cable 17 of the CCD camera 5 and the optical fiber 19 of the irradiation head 18 are inserted and housed in a flexible metal sleeve 21, which extends in the width direction of the web 1 and extends in the vertical direction. One end is attached to the carriage 7 and the other end is attached to the frame 10. The metal sleeve 21 is made up of a number of metal rings connected together, is well known in itself, and can be bent freely in one direction. Therefore, when the carriage 7 reciprocates in the width direction of the web 1, the metal sleeve 21 follows and bends in one direction, thereby allowing the carriage 7 to reciprocate. Note that the metal sleeve 21 does not bend in the opposite direction. Therefore, at the attachment position to the frame 10,
The metal sleeve 21 remains horizontal and does not sag downward. The metal sleeve 21 is commonly called a cable carrier.

Furthermore, an encoder 22 is attached to the guide roller 4.
is provided. The encoder 22 is for detecting the amount of feed of the web 1 in the longitudinal direction.

Therefore, in this apparatus, the web 1
When a pattern is being printed on the traverse device 6, when the carriage 7 is sent by the feed screw 9 of the traverse device 6 and reciprocated in the width direction of the web 1, the CCD camera 5 and the irradiation head 18 are integrated with the carriage 7. Move back and forth. Therefore, the surface of the web 1 is photographed and scanned by the CCD camera 5. Furthermore, the image captured by the CCD camera 5 is taken out as a still image at an arbitrary timing, and
It is reproduced on the monitor 14. In this embodiment, the lengthwise feed amount of the web 1 is detected by the encoder 22, and each time the web 1 is fed by the unit length of the pattern, the imaging storage retrieving device 13
The stored image is retrieved and reproduced on the TV monitor 14. Therefore, it is possible to monitor and check the deviation of the patterns on the web 1 using the TV monitor 14. Even if the web 1 itself is traveling at a fairly high speed, what is reproduced on the TV monitor 14 is a still image, and even non-experts can easily monitor and check for deviations in the patterns on the web 1. It is. It is safe and there is no need to run up to the top of the printing machine, unlike in the past.

Furthermore, it is the light source 20 such as a halogen lamp that illuminates the photographed portion of the web 1 with a spot instead of a strobe, so that the photographed portion of the web 1 can be spot-irradiated continuously. Therefore, unlike a strobe that repeatedly emits instantaneous light without any interruption, it does not tire the eyes of the worker and does not reduce their attentiveness.

Furthermore, in addition to checking for misalignment of the patterns on the web 1, this device can also check for non-printing phenomena such as color stains, doctor scratches, uneven printing, and non-adherence on the web 1, thereby increasing the yield. Furthermore, the TV monitor 14 is equipped with a cross cursor generator function, and the surface of the web 1 is photographed by the CCD camera 5 before or after the design is printed, and vertical and horizontal electronic lines are displayed on the monitor screen. However, the curved texture of the web 1 can be monitored and checked using the horizontal electronic line as a reference line, and the curved texture can also be corrected using a texture straightening machine.

[0019] Not only in textile printing machines but also in printing machines that print designs on webs made of paper or plastic films, when designs are printed on the web, this device monitors for non-printing phenomena such as misalignment of the designs. , you can also check.

[0020]

As described above, according to the present invention, it is possible to monitor and check the phenomenon of non-uplift such as deviation of the pattern on the web 1 using the TV monitor 14. Even if the web 1 itself is running at a fairly high speed, what is reproduced on the TV monitor 14 is a still image, and even non-experts can monitor the web 1 for non-upsetting phenomena such as misalignment of the design. It's easy to check. It is safe and there is no need to run up to the top of the roller printing machine as in the past. Furthermore, it is not a strobe that illuminates the photographed area of the web 1 as a spot, but a light source 20 such as a halogen lamp.
It is possible to continuously spot irradiate the photographed portion of the web 1. Therefore, unlike a strobe that repeatedly emits instantaneous light without any interruption, the intended purpose can be achieved without tiring the eyes or reducing the worker's attentiveness.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the invention.

FIG. 2 is a front view of the non-rising phenomenon monitoring device shown in FIG. 1;

[Explanation of symbols]

1. Web 5 CCD camera 6 Traverse device 7 Carriage 13 Imaging memory retrieval device 14 TV monitor 18 Irradiation head 19 Optical fiber 20 Light source

Claims (2)

[Claims] 1. A device for monitoring non-uplifting phenomena such as misalignment of patterns on a running web, the device comprising: a CCD camera disposed to face the web, supported by a carriage, and photographing the surface of the web; , a traverse device that reciprocates the carriage in the width direction of the web, a TV monitor, a traverse device connected to the CCD camera and the TV monitor, which stores the image taken by the CCD camera and converts it into a still image at an arbitrary timing. Take it out as
an image capture and storage retrieval device that reproduces images on the TV monitor; a light source such as a halogen lamp; and a device supported by the carriage;
A web undulation phenomenon monitoring device comprising an irradiation head connected to the light source via an optical fiber and irradiating a spot on the photographed portion of the web. 2. The apparatus according to claim 1, wherein the web is cloth, and the design is printed by a roller printing machine.