JPH10307111A - Device for detecting flaw of wind-up paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect the cut of a web side edge part as a flaw and to prevent an erroneous operation due to, for example, the meandering of a web and the contamination of a light source by enlarging a small flaw at the web side edge part by a flaw-enlarging device and detecting the enlarged flaw by a sensor for detecting flaw. SOLUTION: A flaw-detecting device has a flaw-enlarging device 11 for enlarging the flaw of, for example, a cut that is located at the both side edges of a web 1a that is delivered from a wind-up paper 1 and a sensor 12 for detecting a flaw. When a wind-up paper automatic cutting device starts to be operated, the web 1a that is delivered from the wind-up paper 1 being mounted to an arm 2 passes between the blades of a surface-side and reverse- side enlarging device being located on the both side surfaces of its flat part. When the side end face of the web 1a has a small flaw, the flaw is opened and is erected when it passes through the blade tip and the erected part is bent and the flaw is enlarged. When the flaw passes through the sensor 12, the quantity of light of a light receiver 18 increases, thus easily detecting the flaw of the side edge part of the web 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wound paper wound detecting device applied to an automatic wound paper tailoring device and the like.

[0002]

2. Description of the Related Art Paper breakage during operation is the most problematic and important in the operation of a rotary press. If the paper breaks during printing, not only the number of waste sheets increases, but also labor and time are wasted, and the printing time is delayed. This piece of paper is
Often caused by scratches on the skin layer of the web.
The scratches occur during transport of the wrapping paper or at the time of unpacking the wrapping paper, but a particular problem is a small scratch called an edge cut on an ear (side end) of the wrapping paper. Therefore, it is necessary to prevent a paper break during printing by, for example, finding a scratch on the roll paper before supplying the roll paper to the rotary press, and cutting the cut portion.

[0003] For this reason, a wound paper detecting apparatus has been conventionally attached to an automatic wound paper tailoring apparatus (hereinafter abbreviated as SPR) to automatically detect a wound on the wound paper skin layer, and particularly harmful. Automatic tailoring is performed with the ears and other scratches removed.

FIGS. 11 and 12 show a conventional wound paper flaw detection device 40 attached to an SPR and its arrangement. The flaw detection device 40 uses a skin (hereinafter, referred to as a web) 1a which is fed out onto the table 5 from the paper roll 1 suspended on the arm 2 of the SPR by a fluorescent light disposed on the back side of the table 5. The light passes through the lamp light source 47 and two cameras that are arranged side by side on the opposite side and that cover the entire width of the paper.

If the web 1a fed from the web 1 has a flaw, the total amount of light received by the two cameras 48 changes. However, since the conventional flaw detection device 40 is a method of detecting by a change in the amount of light entering the camera 48, the following problems are inherent.

(A) Irrespective of the state of the skin, a change in the amount of light incident on one of the cameras 48 is judged to be "scratched", so that the amount of light incident changes due to the meandering of the web 1a fed out. Even if it did, it was judged that there was "scratch". (B) If there is a cut in the ear, such as a cut made by a cutter, even if the cut portion passes over the light source 47, the amount of light incident on the camera 48 does not change.
(C) Even if the amount of light incident on the camera 48 changes due to contamination of the light source 47 or the like, a malfunction such as detection as a flaw may occur.

[0007]

DISCLOSURE OF THE INVENTION The present invention is directed to a rolled paper in which a cut at the end of the web side is detected as a flaw and a malfunction does not occur due to the meandering of the web or contamination of the light source. An object of the present invention is to provide a flaw detection device.

[0008]

According to the present invention, there is provided a wound paper wound detecting apparatus according to the present invention, comprising: a wound enlarging apparatus for enlarging a flaw at a side end of a web; and a flaw detecting sensor for detecting these flaws. The wound enlargement device is provided at a flat portion side end of a web fed from a roll of paper, and has a web pressing means for pressing a side end portion of the web to enlarge a wound of the portion. Features.

When the flaw detection sensor is composed of a light emitter for projecting light toward the end on the web side and a light receiver for detecting the amount of light transmitted through the web, the light receiver includes the light receiver. It is preferable that a controller for calculating the amount of light transmitted through the web received by the container be connected. The flaw detection device and the flaw detection sensor are usually provided at both ends of the web. Further, the light projector is preferably a semiconductor laser oscillator.

[0010]

According to the present invention, both end portions of the web are pressed by the pressing means provided in the flaw enlarging device disposed at the side end portion of the web, and fine scratches on the web side end portion are enlarged.
Each of the enlarged scratches is detected by a scratch detection sensor. The flaw detection sensor is composed of a light emitter that emits light toward the end on the web side and a light receiver that detects the amount of light transmitted through the web. A controller is connected to this light receiver to calculate the amount of light transmitted through the web. If processing is performed, even if the amount of light received by one of the light receivers increases due to the meandering of the web, the amount of light received by the other light receiver will decrease. It is possible to prevent malfunction of the flaw detection device. In addition, since the semiconductor laser light has a high transmission power, if a semiconductor laser oscillator is used as the light projector, even when the light projector, that is, the light source becomes dirty, malfunction of the scratch detection device due to the soiling of the light source can be reduced.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a wound paper detecting apparatus according to the present invention.

1 to 5 and FIG. 10 show a first embodiment of a wound paper scratch detecting device according to the present invention attached to an SPR. In the figure, 1 is a roll paper, 2 is an arm of the SPR for suspending the roll paper 1, 1a is a web fed from the roll paper 1, 3a and 3b are placed on the surface of the fed web 1a, And a pair of left and right movable tables in a tape application device that applies an adhesive tape while moving in parallel from the outside toward the axis. The flaw detection device of this embodiment includes a flaw enlarging device 11 for enlarging flaws such as cut ears at both ends of a web 1a fed from a roll of paper, a flaw detection sensor 12 for detecting the flaw, A controller 13 for calculating data detected by the sensor 12;

When the SPR is, for example, for newspaper wrapping paper, the wound enlarging device 11 is configured as shown in FIGS.
A back-side flaw enlarging device 11b, which is disposed at a position corresponding to each of the paper widths W ₁ , W ₂ , and W ₃ of A, B, and C windings, and is provided at the entrance of the table 5 of the SPR three by right and left, A surface flaw enlarging device 11a is provided for each set of moving units 3a and 3b of the tape affixing device which moves to a position facing the back side flaw enlarging device 11b according to the paper width. As shown in FIGS. 3 and 4, the center of each of the wound width enlarging devices 11a and 11b coincides with both ends of the web 1a according to the paper width, is separated along the traveling direction of the web 1a, and sandwiches the web 1a. It is arranged on the front side and the back side of the web 1a, and the moving tables 3a, 3b are respectively provided via brackets 15a, 15b.
b and an air cylinder 16 suspended from the table 5;
Blades 14a and 14b fixed to the tip of a rod 19 of these air cylinders.
The a and b can be freely advanced and retracted by the air cylinder 16.

The flaw detection sensor 12 is shown in FIGS.
As shown at 0, the light receiving device 18 includes a light receiving device 18 supported by the back surface of the table 5 and a light emitting device 17 mounted on the support 4 of the SPR. Note that a semiconductor laser oscillator is preferably used as the light projector 17 because the semiconductor laser light has a high transmission power and can reduce the malfunction of the scratch detection device due to contamination of the light source. Other light sources may be used as long as light can be emitted so that the amount of transmitted light can be distinguished between a case where the side end has a flaw and a case where there is no flaw.

As the blade 14, for example, FIG.
As shown in (1), the tip may be angled so that the side end of the web 1a can be pressed deeply.
In addition, the inclination of the blade 14 is appropriately set to X,
It can be adjusted in the three axial directions of Y and Z.

When the operation of the SPR is started, the web 1a fed from the web 1 mounted on the arm 2 of the SPR is located at both ends of the flat portion of the web 1a as shown in FIG. Front and back side magnifying devices 11a, 1
1b passes between the blades 14a and 14b. At this time,
Each of the blades 14a and 14b of the front and back side wound enlarging devices are
Since the web 1a is operated as a web pressing means in a direction of pressing the web 1a from the front surface and the back surface thereof by the air cylinder 16, both end portions of the web 1a become Z-shaped as shown in FIG. 4 and extend between the blades 14a and 14b. pass. Therefore, as shown in FIG.
a, there is a minute flaw W at the side end of the blade 1
When the blade 4a passes through the cutting edge of the blade 14b, it rises open, and when it passes through the blade of the blade 14a, the rising portion is bent. As a result, as shown in FIG.

Next, as shown in FIG. 10, the web 1a enters between the light emitter 17 and the light receiver 18 of the flaw detection sensor, and when the enlarged flaw passes through the sensor 12, the light receiver 18 Therefore, the flaw detection device 10 can easily detect the flaw at the end of the web 1a side.

Further, the paper roll 1 attached to the arm 2
When the web 1a drawn out of the sensor passes between the light emitter 17 and the light receiver 18 of the flaw detection sensor while meandering, the light reception amount L1 of _one light receiver increases, while the light reception amount of the other light receiver increases. since L ₂ is decreased, the controller 13
If the result of calculating the amount of light received from both light receivers is invariable, that is, if L ₁ + L ₂ = constant, it is determined to be meandering and “scratched”
Can be prevented from being transmitted.

As described above, the flaw detection device 10 of the first embodiment calculates a flaw enlarging device 11, a flaw detection sensor 12 for detecting this flaw, and data detected by the flaw detection sensor 12. The following effects can be obtained since the controller 13 is used. (A) Even if the flaw on the side end of the web 1a is cut by a cutter, the flaw is enlarged by the flaw enlarging device 11, so that when the flaw passes through the flaw detection sensor 12, Since the amount of light received by the light receiving device 18 is greatly increased, it is possible to ensure that even small scratches such as cut ears are not overlooked.
(B) Even if the light receiving amount of the light receiving amount 18 changes due to the meandering of the web 1a unwound from the web 1, the controller 13 calculates the light receiving amount of the light receivers 18 on both sides. If the sum is constant, it is determined that the light amount has changed due to meandering.
Erroneous detection due to meandering a can be eliminated, and the reliability of flaw detection can be improved. (D) An angle is applied to the tip of the blade of the flaw enlarging device so that both ends of the web are pressed, the blade edge of the blade is brought into contact with the web in a direction opposite to the traveling direction of the web, or the web is viewed in a plan view. A pair of blades are arranged so that the blades installed on both sides of the web are inverted C-shaped, and the both sides of the web first hit the blades. Can be folded securely.

The flaw detection device 20 of the second embodiment is the same as the flaw detection device of the first embodiment except that a back side magnifying device 22 shown in FIG. 6 is used instead of the back side magnifying device 11b. . This back side flaw enlarging device 22 is configured by disposing three sets of left and right brushes at the entrance of the table 5 of the SPR at the positions corresponding to the paper width described in the first embodiment.
As shown in FIGS. 6 and 7, the center of the back side wound enlarging device 22 coincides with both side edges of the web 1a,
a, the blade 14a of the front side flaw enlarging device 11a and the brush 23 of the back side flaw enlarging device 22 face each other,
The brush 23 is arranged so as to be close to the back surface of the table a, and the brush 23 is attached to the table 5 by the bracket 24. The brush may be a circular brush that rotates when it contacts the moving web 1a.

When the operation of the SPR is started, the web 1a unwound without being bent from the web 1 mounted on the arm 2 of the SPR has front side flaws located at both ends of the web 1a as shown in FIG. Blade 14 of magnifying device 11a
a and the brush 23 of the back side wound enlargement device 22. At this time, since the blade 14a of the front side flaw enlarging device 11a pushes the web 1a from the front side into the brush 23 on the back side by the air cylinder 16, both side ends of the web 1a are V-shaped as shown in FIG. And passes between the blade 14a and the brush 23. Therefore, if there is a minute flaw at the side end of the web 1a, the flaw opens and rises when passing through the tip of the flocked portion of the brush 23, and the rising portion is bent when passing through the cutting edge of the blade 14, so that As in the case of the first embodiment, the flaw is greatly opened and enlarged.

Therefore, in addition to obtaining the same effects as in the first embodiment, since the flaws on the web side end from the back surface are enlarged by the brush 23, compared with the flaw detection device of the first embodiment. Processing and assembly can be facilitated by reducing the number of parts.

The flaw detection device 30 of the third embodiment is the same as the flaw detection device of the first embodiment, except that a back side magnifying device 32 shown in FIG. 8 is used instead of the back side magnifying device 11b. . The back side flaw enlarging device 32 includes three sets of left and right air nozzles 33 at the positions corresponding to the paper widths described in the first embodiment.
It is arranged at the entrance of the R table 5. As shown in FIGS. 8 and 9, the center of the back side flaw enlarging device 32 coincides with both side edges of the web 1a corresponding to the end of the paper width, and the back side flaw enlarging device 32 is connected via the web 1a.
The air nozzle 33 of the back side flaw enlarging device 32 faces the blade 14a, and the air nozzle 33 is arranged so as to be close to the back surface of the web 1a, attached to the back surface of the table 5, and connected to the air source.

When the operation of the SPR is started, the web 1a unwound from the web 1 mounted on the arm 2 of the SPR without bending is damaged as shown in FIG. Blade 14 of magnifying device 11a
a and between the air nozzle 33 of the back side flaw enlarging device 32. At this time, the blade 14a of the front side flaw enlarging device 11a is moved by the air cylinder 16 to the web 1a floating by the air pressure injected from the air nozzle 33.
9 is operated so as to push against the air pressure from the front side to the back side from the front side.
As shown in the figure, the sheet is deformed into a V shape and passes through the blade 14a. Therefore, if there is a minute flaw at the side end of the web 1a, the flaw opens and rises by air pressure when passing over the air nozzle 33, and is bent when the rising part passes through the cutting edge of the blade 14, so that the first
As in the case of the embodiment, the flaw is greatly opened and enlarged.

Therefore, in addition to obtaining the same effect as in the first embodiment, the enlargement of the scratch on the web side end from the back surface is performed by the air pressure jetted from the air nozzle 33. Compared with the flaw detection device of the above, the structure is simple, the number of parts is small, and processing and assembly can be easily performed.

As shown in FIG. 13, the flaw detection device of the fourth embodiment differs from the flaw detection devices of the first to third embodiments in that the flaw is enlarged at a web portion where the flaw is detected by the flaw detection sensor. Thus, a flaw enlarging device provided with an air nozzle 33 is provided. That is, in this flaw detection device, the air nozzle 33 is disposed so that air is blown to the side end portion of the web 1a where flaws are detected by the flaw detection sensors (the light projector 17 and the light receiver 18). Air is blown to the detected part, and the wound expands at this part. Since the flaw is enlarged at the part to be detected in this manner, detection failure caused by the enlarged flaw returning to the original position is prevented.

In the flaw detection device of the above embodiment, a flaw detection sensor comprising a light emitter and a light receiver is used, but not only a transmission type but also a reflection type or a laser focus type can be used. A contact type, an ultrasonic type and the like can also be used as a flaw detection sensor.

[0028]

As described above in detail, according to the wound paper scratch detecting apparatus according to the present invention, a fine flaw on the web side end is enlarged by the flaw enlarging apparatus, and the enlarged flaw is removed. Since each is detected by the flaw detection sensor, minute flaws at the end on the web side, such as ear breaks, can be detected without fail. In addition, light is emitted from the light emitter toward the end of the web side, the amount of light transmitted through the web is detected by a light receiver, and the obtained transmitted light amount of the web is processed by a controller, thereby detecting flaws due to meandering of the web. Malfunction of the device can be prevented. Furthermore, if a semiconductor laser oscillator is used as the light projector, even if the light projector is slightly contaminated, a scratch on the end on the web side can be detected with little effect.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing an automatic paper roll tailoring apparatus;

FIG. 2 is a front view showing an arrangement of the flaw detection device in FIG. 1;

FIGS. 3A and 3B are plan views showing an example of a wound enlargement device according to the present invention;

FIG. 4 is a side view showing a state of the apparatus shown in FIG. 3 during operation;

5 (A) and 5 (B) are drawings schematically showing the effect of the device of FIG. 3,

FIG. 6 is a plan view showing another example of the wound enlargement device according to the present invention,

FIG. 7 is a side view showing a state when the apparatus of FIG. 6 is operated;

FIG. 8 is a plan view showing still another example of the wound enlargement device according to the present invention,

FIG. 9 is a side view showing the state of the apparatus shown in FIG. 8 in operation;

FIG. 10 is a drawing schematically showing an example of a flaw detection sensor according to the present invention;

FIG. 11 is a perspective view showing the principle of a conventional wound paper scratch detection device,

FIG. 12 is a side view showing an automatic winding paper tailoring apparatus provided with the apparatus of FIG. 11,

FIG. 13 is a drawing schematically showing a flaw detection device according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 roll paper 1a web 10, 20, 30, 40 roll paper detection device 11 flaw enlargement device 12 flaw detection sensor 13 controller 14 blade 23 brush 33 air nozzle 17 light emitter 18 light receiver

Claims (7)

[Claims] 1. A wound paper flaw detection device comprising: flaw enlarging means for enlarging flaws at both end portions of a web; and a flaw detection sensor for detecting these flaws. 2. The flaw detecting sensor according to claim 1, wherein the flaw detecting sensor includes a light emitter for projecting light toward the web side end and a light receiving device for detecting the amount of transmitted light transmitted through the web, and the light receiving device performs the processing of calculating the amount of transmitted light. The flaw detection device according to claim 1, wherein a controller is connected. 3. The flaw enlarging means comprises a pair of blades capable of pressing the side ends of the web from the front side and the back side in opposite directions, and these blades are spaced apart along the direction of travel of the web. The flaw detection device according to claim 1 or 2, wherein 4. A blade capable of advancing and retreating in a direction in which the flaw enlarging means abuts a side end of the web from one side of the web and presses the side end against the web, and a position facing the blade. The flocked portion comprises a brush disposed in close proximity to the other surface of the web, and the flaw enlarging means and the flaw detection sensor are disposed separately in the traveling direction of the web. 3. The method according to claim 1, wherein
Flaw detection device 5. A blade which is capable of advancing and retracting in a direction in which the flaw enlarging means abuts a side end of the web from one side of the web to press the side end of the web, and a blade facing the blade. An air nozzle disposed in close proximity to the other surface of the web, wherein the flaw enlarging means and the flaw detection sensor are sequentially separated along the traveling direction of the web. The flaw detection device according to claim 1 or 2, wherein 6. The flaw enlarging means comprises an air nozzle.
The flaw detection device according to claim 1, wherein the air nozzle is arranged so that air injected from the air nozzle is blown to a flaw detection site of the web. 7. The flaw detection device according to claim 2, wherein the light emitter of the flaw detection sensor is a semiconductor laser oscillator.