JP3789519B2 - Defect removal equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a technique for removing defective parts of a web in a web manufacturing and processing apparatus. In particular, a defect removal apparatus capable of accurately stopping a defective portion of a web at a predetermined position for removing a defect based on defect data obtained in a defect removal process or obtained in a preceding process. About.
[0002]
[Prior art]
In a manufacturing and processing apparatus such as an offset printing machine, a gravure printing machine, a coating apparatus, a laminating apparatus, and a sheet processing apparatus, a web winding body is obtained by printing or other processing on the web. This winding body is rewound in an apparatus called a “rewinding inspection machine”, and at that time, an operator performs a visual inspection, a check of a defective instruction portion (a portion to which an instruction tape is attached), and the like. Removal is performed manually.
After that, when the wound body is a wound body that is used in a narrow width like a packaging film, it is slit to a predetermined width by a slitter, and surface defects such as doctor streaks are further slit. After the post-winding, a process such as removal is performed manually while rewinding with a rewinding device.
A wide winding body is called a jumbo roll, and a narrow winding body after a slit is also called a pancake.
[0003]
[Problems to be solved by the invention]
In the rewind inspection machine, when a defect is detected, the web transfer is first stopped, and then the operator reverses the defective portion to a predetermined position to remove the defect, and rewinds the web that has gone too far. A defect detection device can be provided in the rewind inspection machine, but there is no defect removal device applicable to the rewind inspection machine, and failure removal cannot be automated.
Furthermore, in the case of a slitter machine, the web transfer direction cannot be reversed due to the quality, and the web that has gone too far cannot be rewound. That is, even if a defect is detected, it cannot be stopped at a predetermined position, and the defect cannot be removed.
[0004]
Accordingly, an object of the present invention is to provide a defect removing apparatus capable of stopping a defective portion at a predetermined position even when applied to an apparatus such as a slitter.
[0005]
[Means for Solving the Problems]
  The above object is achieved by the present invention described below. That is, the present invention is a defect data input means for inputting defect data of a web obtained in a previous step of defect removal, in which defect positions and defect contents are recorded over the entire length and width of the web of the winding body,Identify the defective position of the web without unwinding the web of the winding body, predict the defective position of the web,Based on the new defect position obtained by converting the defect position in the defect data,The non-defective part transports the web at high speed, and when the defective part approaches, it performs the web transport speed control that decelerates and transports the web,A defect having control means for stopping the web transfer by matching the defect removal position of the apparatus with the defect start position of the web to be transferred, and a defect removal means for separating and removing the defective part of the web from the non-defective part of the web It is a removal device. Therefore,According to the present invention, productivity and alignment accuracy can be improved.
[0006]
According to another aspect of the present invention, there is provided a defect removing apparatus comprising: an inspection unit provided in a web transfer path; and a position correction unit that corrects a defect position of the defect data by an output signal of the inspection unit. An error occurs between the defect position on the data based on the defect data in which the defect position and the defect content are recorded over the entire length of the web of the winding body and the actual defect position on the actual winding body of the web. Even in such a case, the error can be corrected by using the inspection means together.
[0007]
Further, the present invention is a defect removal apparatus having a web accumulation means upstream or downstream of the defect removal means. When the web accumulating unit is upstream of the defect removing unit, the stop control allowable time after the defect detection can be increased by the accumulated web transfer time. That is, since the raw material of the feeder part is quite heavy, a motor with a large capacity is required to accurately perform deceleration control in a short time. On the other hand, the web that is unwound while being slowed down is quite long. Therefore, by providing an appropriate web accumulating section, it is possible to accurately decelerate and stop in a short time with inexpensive equipment (a motor with a small capacity). Further, since the fine adjustment of the stop position of the web to the defect removal unit can be performed also on the movable roller of the accumulation unit, the control becomes simple.
When the web accumulating unit is downstream of the defect removing unit, it is possible to lengthen the allowable time for stopping and controlling the post-process apparatus after the defect detection. That is, sudden deceleration after the slitter is mitigated in order to prevent deterioration in winding quality due to sudden deceleration stop.
Moreover, this invention is a defect removal apparatus which has a slit means to slit a web in the conveyance direction after the said defect removal means. That is, slitting and defect removal can be performed in a series of movements on the same machine.
Moreover, this invention is a defect removal apparatus which has a slit means to slit a web in the conveyance direction before the said defect removal means. That is, the slit and the defect removal can be performed in a series of movements in the same machine, and the defect of the surface loss such as the doctor streak is removed after the slit to improve the product yield.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described. FIG. 1 is a view showing an embodiment of the defect removing apparatus of the present invention. In FIG. 1, 1 is a defect input means for inputting web defect data, and 2 is a LAN (such as an Ethernet) connected to the defect input means 1 for inputting web defect data or the like to the defect input means 1 via the network. (Local Area Network) 3 is a floppy disk for inputting web defect data or the like to the defect input means 1, a portable recording medium such as an MO (magneto-optical disk), 4 is an inspection means for detecting a web defect, Reference numeral 5 denotes position correction means for correcting an error between the defect position of the defect data obtained in the previous process and the defect position obtained by the actual web inspection means 4.
[0009]
Further, 6 is a control means for stopping the web transfer by matching the defect start position of the web to be transferred and the defect removal position of the defect removing device, and 7 is a defect for separating and removing the defective portion of the web from the non-defective portion of the web. The removal means 8 is a web storage means provided upstream of the defect removal means in order to lengthen the permissible time for stop control after the failure detection, and 9 is a longer permissible time for stop control of the device in the subsequent process after the failure detection. Therefore, the web accumulating means provided downstream of the defect removing means, 10 is a feeder, 11 is a slitter, 12 is an original fabric (jumbo roll), 13 is a web, 14a, 14b, and 15c are wound bodies (pans) after slitting. Cake), 15 is a defective winding body.
[0010]
Next, the operation of the above configuration will be described. The defect data input means 1 has a plurality of operation modes, and in the first operation mode, an operation based only on the defect data input from the inspection means 4 is performed. In the second operation mode, an operation based on only defective data input from the recording medium 3 or the LAN 2 is performed. In the third operation mode, an operation is performed based on both the defect data input from the recording medium 3 or the LAN 2 and the defect data input from the inspection unit 4.
[0011]
First, the case of the first operation mode will be described. The web 13 unwound from the web 12 of the wound body (jumbo roll) in the feeder 10 is inspected by the inspection means 4 for the presence or absence of a defective portion. When a defective portion is detected, the inspection unit 4 outputs defect data, and the defect data input unit 1 inputs the defect data.
The defect data input means 1 determines whether or not the defect data is to be removed by the defect removal means 7 from the defect data. Most of the defects should be removed by the defect removing means 7, but depending on the contents of the defect, it may be better to remove them by another process. For example, a web produced by a gravure printing machine or gravure coater has a defect called a doctor streak, but this defect runs in the direction of web transfer and occurs at a specific position in the direction perpendicular to the direction of transfer (width direction). Only occurs. Therefore, after the web 13 is sectioned in the width direction by the slitter 11, it is better to remove the wound body (pancake) 14 including defects from the product.
Even in the case of a defect that should be removed in another process, the defect data is registered in the inspection data file and used as quality control data when performing defect removal in a subsequent process.
[0012]
Of the defects, what should be removed by the defect removing means 7 and what should not be removed are preset in the defect data input means 1 as determination parameters. If the defect removal means 7 determines that the defect should be removed, the defect data input means 1 outputs a stop signal to the control means 6 so that the control means 6 starts a stop operation.
When the control means 6 receives the stop signal, the control signal for the stop operation is applied to all components related to the web transfer, such as the feeder 10, the web storage means 8, the defect removal means 7, the web storage means 9, the slitter 11 and the like. Is output.
The web accumulating means 8 can lengthen the permissible time for stop control after detecting the defect by the accumulated web transfer time. Further, the web accumulating means 9 can lengthen the time for stopping and controlling the slitter 11 in the post-process after the defect is detected by the accumulated web transfer time, thereby performing a smooth stopping operation.
[0013]
As a result, when the start position of the defective portion of the web 13 detected by the inspection means 4 or a position slightly before that reaches the defect removal position of the defect removal means 7, all the constituent portions perform the transfer operation of the web 13. Stop. The alignment of the defect start position and the defect removal position is performed by determining the distance of the web path between the position where the inspection unit 4 detects the defect and the defect removal position, and the web 13 after the defect is detected by the inspection unit 4. This is done by matching the distance traveled.
In a state where the defect start position of the web 13 reaches the defect removal position of the defect removal unit 7 and stops, the defect removal unit 7 starts an operation for removing the defect. The defect removing means 7 cuts the web 13 at the start position of the defective portion of the web 13 or slightly before it, and connects the upstream web 13 to the defective winding body 15 and winds it. The downstream web 13 is held by the non-defective product holding means in a stopped state.
[0014]
The inspection means 4 continues the inspection of the web 13 after detecting the defect, and detects the defect end position. The inspection end unit 4 also outputs the defect end position as defect data, and the defect data input unit 1 inputs it. The defective end position can also be determined as a position on the web 13 where the defective data repeatedly output is interrupted. When the defect data input means 1 inputs the data of the defect end position or determines the defect end position, the defect data input means 1 outputs a defect winding stop signal for stopping the winding of the web 13 to the defect winding body 15 to the control means 6. To do.
The control means 6 inputs the defective winding stop signal, and the operation of winding the web 13 carried out by the defective removing means 7 around the defective winding body 15 is carried out until the defective end position or slightly beyond the position. Stops when 13 is wound up. The stop at the defective end position of the winding operation of the web 13 is the distance of the web path between the position where the inspection means 4 detects the defect and the defect removal position, and after the defective end is detected by the detecting means 4. Alternatively, the detection is performed by matching the distance to which the web 13 is transferred after it is considered that the defective end has been detected by the detection means 4.
[0015]
The defect removing means stops the operation of winding the web 13 around the defective winding body 15, then cuts the web 13 and separates it from the defective winding body 15, and holds the upstream web 13 by the non-defective product holding means in the stopped state. Connected to the downstream web 13. The web on the defective winding body 15 side is held by the defective side holding means.
When the connection is completed, the control means 6 performs control to resume operation. The feeder 10, the web accumulating means 8, the defect removing means 7, the web accumulating means 9, and the slitter 11 are returned to the normal operation, and the raw fabric (jumbo roll) 12 is slit in the slitter 11, and the narrow winding after the slitting is performed. A body (pancake) 14 is obtained.
The description of the case of the first operation mode in which the operation based only on the defective data input from the inspection unit 4 is completed.
[0016]
Next, a second operation mode for performing an operation based only on defective data input from the recording medium 3 or the LAN 2 will be described. A description common to the first operation mode described above is omitted, and only the characteristic part of the second operation mode will be described.
In the second operation mode, a defect removal operation based only on the defect data of the original fabric (jumbo roll) 12 obtained in the previous process is performed. The defect data includes defect position data and defect content data, and the defect data input means 1 first associates the defect position data with the actual defect position of the original fabric (jumbo roll) 12. When the web is unwound from the winding body (front) and processed to obtain a processed winding body (rear), the top of the web of the winding body (front) is the winding body (rear) ) Is the tail of the web near the core. Therefore, the defect position data obtained in the previous process and the actual defect position of the original fabric (jumbo roll) 12 are interchanged, and the defect position data is interchanged.
Of course, the defect start position in the previous process is the defect end position, and the defect end position in the previous process is the defect start position.
[0017]
Further, since the end position data of the final defect in the previous process is the start position data of the first defect, the web is transferred after the end position data of the final defect in the previous process and wound on the winding body (rear). Data indicating the distance (length) or position (pitch, number of screens) is required. If the start position data of the first defect is obtained, the defect position can be calculated by simple calculation as a relative distance for the other defect positions.
Normally, since the entire length of the wound body is attached as attribute data to all the wound bodies, the start position data of the first defect is obtained by subtracting the end position of the final defect in the previous process from the total length. .
Although not described in detail, when the winding body is set in the web path of the defect removing apparatus, the web is pulled out from the winding body or used in addition to the previously processed web remaining in the web path. Such defect position data is corrected in accordance with the difference in the actual handling method.
[0018]
As described above, the defect removal is performed based on the defect position data newly obtained by converting the defect position data obtained in the previous process. From the measurement data of the transfer distance of the web 13 and the newly obtained defect position data, it is clear that data equivalent to the defect data output by the inspection means 4 described in the first operation mode is obtained. Since the detailed description of the defect removal operation is duplicated, it will be omitted.
In the second operation mode, it is difficult to make the defect position data coincide with the defect position as a substance depending on the method of handling the winding body, or the error becomes large. Therefore, the range to be removed as a defect is expanded more than the defect range indicated by the defect position data, or the defect start position and the defect end position are marked (paper tape inserted, ink-jet printing, etc.) The position is detected, and the defect as an entity is surely removed. On the other hand, as a feature point of the second operation mode, the defect position of the web can be identified without unwinding the web of the winding body, and the defect start position of the web becomes the defect removal apparatus of the defect removal apparatus. The time of arrival can be predicted well before. In other words, by controlling the web transfer speed, the non-defective part can transfer the web at high speed, and when the defective part approaches, the web can be decelerated and transferred to improve productivity and alignment accuracy. .
The description of the second operation mode in which the operation based only on the defective data input from the recording medium 3 or the LAN 2 is completed.
[0019]
Next, a description will be given of a third operation mode in which an operation based on both the defect data input from the recording medium 3 or the LAN 2 and the defect data input from the inspection unit 4 is performed. A description common to the first and second operation modes will be omitted, and the description will be limited to the features of the third operation mode.
As already apparent, in the third operation mode, the defect position data of the web in the first operation mode is accurately obtained, and the defect start position of the web in the second operation mode is the defect removal of the defect removal apparatus. And a feature capable of predicting the time point at which the apparatus arrives sufficiently long.
[0020]
New defect data is generated based on the defect data input from the recording medium 3 or the LAN 2 in the same manner as in the second operation mode, and the defect is removed based on the new defect data. At that time, as in the first operation mode, the defect data output from the inspection unit 4 is input to the defect data input unit 1. The defect data output from the inspection means 4 is compared with the new defect data described above. If they do not match, the defect position data in the new defect data is corrected by the defect data output from the inspection means 4. 5 is performed.
[0021]
The first defect start position data in the new defect data is compared with the first defect data output from the inspection means 4, or the starting position of the original fabric is marked with tape or ink-jet etc. The position correction means 5 compares all the defect position data in the new defect data by the distance of the difference between the positions of the defect data. to correct. When this correction is performed, there is almost no difference in the defect position data between the corrected new defect data and the defect data output from the inspection means 4.
However, since a new defect may occur during the transport of the jumbo roll, the operation for removing the defect is performed by the defect data output from the inspection unit 4 even after the position correction of all the defects. Like that. Depending on the web material, heat and tension are applied in the processing step to cause expansion and contraction of the web. The expansion and contraction is usually small, but it may be better to perform correction. Therefore, when the start position data of the first defect in the new defect data and the first defect data output from the inspection means 4 are compared and corrected, and the same correction is performed for the subsequent defect data, the web removal is performed. The range can be strictly limited, and the yield of good products can be improved.
The description of the third operation mode in which the operation based on the defect data of both the defect data input from the recording medium 3 or the LAN 2 and the defect data input from the inspection unit 4 is completed.
[0022]
[Example 1]
Next, it demonstrates concretely based on the Example of this invention. FIG. 2 is a diagram showing the configuration of a defect removal apparatus that performs defect removal based on defect data input from the inspection means.
In FIG. 2, 21 is a feeder section, 22 is an inspection section, 23 is an accumulating section that is a web storage means, 24 is a defect removing section, and 25 is a slitter. Reference numeral 12 denotes an original fabric (jumbo roll), 13 denotes a web unwound from the original fabric 12, 14a and 14b denote windings after panning (pancake), and 15 denotes a removed defective web wound body. In the accumulator 23, 28a, 28b, 28c, 28d are movable rollers, and 29a, 29b, 29c, 29d, 29e are fixed rollers.
The defective data input means and control means already described in FIG. 1 are omitted from the illustration and description in FIG. 2 (a specific configuration is shown in FIG. 4).
[0023]
As shown in FIG. 2, the web 12 (jumbo roll) is unwound in the feeder section 21, passed through the inspection section 22, and transferred to the accumulation section 23. The original fabric 12 (jumbo roll) is attached to the support shaft of the feeder unit 21, and the support shaft is connected to the rotation shaft of a motor that generates reverse rotation torque and applies back tension, or to the support shaft. A rotary braking mechanism such as a powder brake is connected, and tension is applied to the transferred web.
[0024]
The accumulator 23 as the web accumulating means is substantially perpendicular to the fixed roller group (29a, 29b, 29c, 29d, 29e), the web transfer direction (x axis), and the axial direction (z axis) of the fixed roller (y axis). ) And a movable roller group (28a, 28b, 28c, 28d) configured to be movable between the fixed rollers. When the web is first passed through the accumulator 23, the movable roller group is disposed at a position indicated by a solid line so that the web passes through the accumulator at a shortest distance so as to draw a straight line. When accumulating the web 13 in the accumulator 23, the movable roller group is arranged at the position indicated by the dotted line, the web meanders while changing the direction of the accumulator zigzag, and the web path in the accumulator 23 becomes long. The web path in the accumulator 23 is uniquely determined by the position of the movable roller group on the y-axis (see above) and can be changed continuously.
[0025]
That is, the distance M of the web path in the accumulating unit 23 is given by the following equation (1).
[Expression 1]
M = F (y)
However, F (y) is a function of y and is determined by actual measurement or by an approximate expression.
Therefore, accurate distance data of the web path can be obtained by detecting the position of the movable roller group. Although omitted in FIG. 1 described above, detection data of the position of the movable roller group is output from the web accumulating means 8 and 9 to the control means 6, and the control means 6 is input by inputting the detection data. The accurate distance data of the web path is obtained at.
The accumulator 23 performs the operation when controlling the transfer of the web 13 smoothly and reliably, and operates so as to prevent the defective portion from passing through the defect removing portion until the transfer of the web is stopped. Even during the period, accurate distance data of the web path can be obtained as described above.
[0026]
The web 13 that has passed through the accumulator part passes through the defect removing part 24, reaches the slitter part 25, and a wound wound body (pancake) is obtained. FIG. 3 is a diagram showing the configuration of the defect removal unit. In FIG. 3, 31 is a detection sensor, 32 is a web stop position, 33 is a cutting part, 34 is a tape bonding part, 35 is a web switching part, and 36 is a defective web winding part.
The detection sensor 31 is for detecting a specific position in the cycle when the web has a predetermined cycle due to printing or the like. When the web has a predetermined period, such as a printed web, when a good web is connected, it is cut at a predetermined cutting point so that it does not become a defective web even if there is a connection part. Connection is made so as not to disturb the period.
That is, when the specific position of the web 13 is detected by the detection sensor 31 immediately before the defective start portion of the web 13 is introduced into the defect removing unit 24, the web 13 is reached until the cut portion of the web 13 reaches the cutting unit 33. 13 is transferred and the web transfer is stopped.
[0027]
The web 13 is cut at the cutting portion 33, and the upstream end of the web 13 is held at the web stop position 32. The web stop position 32 has, for example, holding means for holding a web by vacuum suction having a plurality of suction holes. The downstream end of the web 13 is held by the same holding means in the non-defective product holding section of the web switching section 35. Thereafter, the web switching unit 35 moves the portion holding one end of the defective web winding body 15 toward the web stop position 32. In this state, the upstream end of the web 13 and one end of the defective web winding body 15 are tape-bonded by the tape bonding part 34.
A defective web winding body 15 is obtained by winding a defective portion of the web 13 in the defective web winding portion 36.
[0028]
When all the defective portions are wound up, the specific position of the web 13 is detected by the detection sensor 31, and the web 13 is transferred from there until the cut portion of the web 13 reaches the cutting portion 33, and the web transfer is stopped.
The web 13 is cut at the cutting portion 33, and the upstream end of the web 13 is held at the web stop position 32. The downstream end of the web 13 is held by the defect holding unit of the web switching unit 35. Thereafter, the web switching unit 35 moves the portion holding one end of the good web to the web stop position 32 side. In this state, the upstream end of the web 13 and one end of the non-defective web are tape-bonded by the tape bonding part 34.
The transfer of the web 13 is resumed, and the non-defective web is slit by the slitter unit 25 to obtain a narrow roll (pancake) 14 of the non-defective web.
[0029]
[Example 2]
Next, it demonstrates concretely based on another Example of this invention. FIG. 4 is a diagram showing a configuration of a defect removal apparatus that performs defect removal based on both defect data input from the recording medium 3 or the LAN 2 and defect data input from the inspection unit 4.
In FIG. 4, the same parts as those in FIG. The configuration having the feeder unit 21, the inspection unit 22, the defect removing unit 24, and the slitter unit 25 is the same as that of the first embodiment, but the accumulating unit 23 is not included in the configuration. The reason why the accumulator 23 is not included in the configuration is that, as already described in the explanation of the third operation mode of FIG. 1, the time when the defect start position of the web reaches the defect removal apparatus of the defect removal apparatus is sufficiently long. This is because control for aligning the defect position of the web 13 with the defect removal position of the defect removal device 24 can be performed without accumulating the web.
[0030]
Further, the parts not shown in FIG. 2 will be described. 37 is a pre-process inspection machine, 38 is a quality information input / output storage device which is a defective data input means implemented on a computer such as a personal computer or a workstation, Reference numeral 39 denotes a sequencer as control means.
Defective data is collected by the inspection machine 37 in the previous process, and the defective data is input to the quality information input / output storage device 38 via a recording medium or a communication line such as a LAN.
As already described in the description of the third operation mode in FIG. 1 described above, new defect data is generated from the defect data in the quality information input / output storage device 38, and the sequencer 39 based on the new defect data. The feeder unit 21, the defect removing unit 24, and the slitter unit 25 are controlled.
Further, the new defect data is corrected based on the defect data of the web 13 detected by the inspection unit 22.
[0031]
[Example 3]
Next, specific description will be given based on still another embodiment of the present invention. FIG. 5 is a diagram showing a configuration of a defect removing apparatus that performs defect removal from a narrow web after slitting.
In FIG. 5, the same reference numerals are given to the same portions as those in FIG. 2 of the first embodiment, FIG. 4 of the second embodiment, and the like. The point which has the feeder part 21 and the test | inspection part 22 is the structure similar to the above-mentioned Example 1, However, The accumulation part 23 is not included in a structure. The reason is as already described in the second embodiment.
The operations of the inspection machine 37, personal computer 38, control means 39, and inspection unit 22 in the previous process have already been described in FIG.
In FIG. 5, 24a is a first unit of the defect removal unit, 24b is a second unit of the defect removal unit, and 25 is a slitter unit 25 provided upstream of the defect removal unit.
Although not shown in FIG. 5, a web storage unit can be provided as necessary.
[0032]
The operation in the above configuration will be described. In the case of a two-row arrangement in which the wide web supplied from the jumbo roll 12 is divided into two in the slitter unit 22, it is assumed that a defect that occurs in only one row is removed. Here, it is assumed that a defect has occurred in the web on the first unit 24a side.
(1) The position of the defect data detected in the previous process is corrected to obtain defect data corresponding to the entity. In order to align the defect data (quality information) with the actual product, either mark the unwinding position of the jumbo roll 12 (original fabric) or the entire length of the original fabric. Etc. are printed, and the actual position and data are matched automatically or manually.
{Circle around (3)} Deceleration stop control of the web being transferred is started by the control means 39 before the web defect reaches the defect removal unit based on the defect data corresponding to the substance.
(3) When the leading end of the defective portion (removed portion) coincides with the defective removal position (defective cutting position) of the first unit 24a of the defective removing portion, the web transfer is stopped.
[0033]
{Circle around (4)} The leading end of the defective portion of the web on the first unit 24a side is cut at the cutting portion of the first unit 24a.
(5) The web switching portion of the first unit 24a is switched, and the web on the defective web take-up side of the first unit 24a and the tip of the web to be removed are butt-joined by tape bonding.
(6) Wind the defective portion (removed portion) of the web around the defective web. At this time, in synchronization with the defective web winding speed of the first unit 24a, the entire web is transferred while being slit, and the non-defective web on the second unit 24b side after the slit is wound.
(7) When the winding of the defective web is completed, the web transfer is stopped, the web is cut, the web switching unit is switched, and the good webs are joined together.
(8) The normal operation is resumed, and the web is transferred to the next defective portion and slitted.
The case of the two-row arrangement has been described above as an example. However, in the case of the multi-row arrangement, a unit corresponding to the number of columns is provided in the defect removal unit and the same operation is performed. Further, even when a plurality of occurrences occur at the same time or with a time difference, priority is given to stop and defect removal.
[0034]
【The invention's effect】
As described above, according to the present invention, there is provided a defect removing apparatus capable of stopping a defective portion at a predetermined position even when applied to an apparatus such as a slitter.
Further, according to the defect removing apparatus of the present invention, the defect data input means inputs the defect data of the web and identifies the defect position of the web. The web is stopped by the stop control means based on the defective data. In this state, the defective portion of the web is separated from the non-defective portion of the web and removed by the defective removing means.
Further, according to the defect removal apparatus of the present invention, the defect data is obtained in the previous process of defect removal, and is the defect data in which the defect position and the defect content are recorded over the entire web length of the winding body. Therefore, it is possible to identify the defective position of the web without unwinding the web of the winding body, and it is possible to predict the time when the defect start position of the web reaches the defect removing apparatus of the defect removing apparatus sufficiently before. . That is, by controlling the web transfer speed, the non-defective portion can transfer the web at high speed, and when the defective portion approaches, the web can be decelerated and transferred to improve productivity and alignment accuracy.
[0035]
According to the defect removal apparatus of the present invention, the defect removing apparatus includes an inspection unit provided in the web transfer path, and a position correction unit that corrects the defect position of the defect data using an output signal of the inspection unit. The defect position on the data by the defect data in which the defect position and the defect content are recorded over the entire length of the web of the winding body and the defect position on the actual web winding body have an error, The error can be corrected by using the inspection means together.
In addition, according to the defect removal apparatus of the present invention, the defect removal apparatus has inspection means provided in the web transfer path, and the defect data is defect data output by the inspection means. In this case, since a defective portion on the web entity is detected, there is no error in the defective position. On the other hand, the stop control time after detecting a defect is generally short.
[0036]
Further, according to the defect removing apparatus of the present invention, the web accumulating means is provided upstream or downstream of the defect removing means. When the web accumulating unit is upstream of the defect removing unit, the stop control allowable time after the defect detection can be increased by the accumulated web transfer time. That is, since the raw material of the feeder part is quite heavy, a motor with a large capacity is required to accurately perform deceleration control in a short time. On the other hand, the web that is unwound while being slowed down is quite long. Therefore, by providing an appropriate web accumulating section, it is possible to accurately decelerate and stop in a short time with inexpensive equipment (a motor with a small capacity). Further, since the fine adjustment of the stop position of the web to the defect removal unit can be performed also on the movable roller of the accumulation unit, the control becomes simple.
When the web accumulating unit is downstream of the defect removing unit, it is possible to lengthen the allowable time for stopping and controlling the post-process apparatus after the defect detection. That is, sudden deceleration after the slitter is mitigated in order to prevent deterioration in winding quality due to sudden deceleration stop.
Moreover, according to the defect removal apparatus of this invention, it has a slit means to slit a web in a conveyance direction after a defect removal means. That is, slitting and defect removal can be performed in a series of movements on the same machine.
Moreover, according to the defect removal apparatus of this invention, it has a slit means which slits a web in a conveyance direction before a defect removal means. That is, the slit and the defect removal can be performed in a series of movements in the same machine, and the defect of the surface loss such as the doctor streak is removed after the slit to improve the product yield.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a defect removal apparatus of the present invention.
FIG. 2 is a diagram showing a configuration of a removal apparatus that performs defect removal based on defect data input from an inspection unit.
FIG. 3 is a diagram illustrating a configuration of a defect removal unit.
FIG. 4 is a diagram showing a configuration of a removal device that performs defect removal based on both defect data input from a recording medium or a LAN and defect data input from an inspection unit.
FIG. 5 is a diagram illustrating a configuration of a defect removing apparatus that performs defect removal from a narrow web after slitting.
[Explanation of symbols]
1 Defect data input means
2 LAN
3 recording media
4 inspection means
5 Position correction means
6 Control means
7 Defect removal means
8,9 Web storage means
10 Feeder
11 Slitter
12 Original fabric (jumbo roll)
13 Web
14 Winding body (pancake)
15 Bad winding body
21 Feeder section
22 Inspection Department
23 accumulator
24 Defect removal section
24a 1st unit
24a Second unit
25 Slitter part
26 Winding after slitting
28a, 28b, 28c, 28d Movable roller
29a, 29b, 29c, 29d, 29e Fixed roller
31 Detection sensor
32 Web stop position
33 Cutting part
34 Tape bonding joint
35 Web switching part
36 Bad web take-up section
37 Pre-process inspection machine
38 Quality information input / output storage device
39 Sequencer

Claims (5)

A defect data input means for inputting defect data of a web obtained in a previous step of defect removal, in which a defect position and defect contents are recorded over the entire length and width of the web of the winding body;
Based on the new defect position obtained by identifying the defect position of the web without unwinding the web of the winding body, predicting the defect start position of the web, and converting the defect position in the defect data. The non-defective part moves the web at a high speed, and when the defective part approaches, the web speed is controlled by decelerating and transferring the web. Control means for stopping the transfer of
A defect removing means for separating and removing the defective portion of the web from the non-defective portion of the web;
A defect removing apparatus comprising: Inspection means provided in the web transfer path;
Position correcting means for correcting a defective position of the defective data by an output signal of the inspection means;
The defect removing apparatus according to claim 1, further comprising:   3. The defect removing apparatus according to claim 1, further comprising a web accumulating unit upstream or downstream of the defect removing unit.   The defect removing apparatus according to claim 1, further comprising a slit unit that slits the web in the transfer direction after the defect removing unit.   The defect removing apparatus according to any one of claims 1 to 4, further comprising slit means for slitting the web in the transport direction before the defect removing means.

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