JPS63235807A - Method for detecting feed quantity of web - Google Patents

Abstract

PURPOSE:To accurately detect the feed quantity of a web with high reliability, by measuring the feed length of the web and counting the feed frequency of the specific pattern of the web and comparing the feed length with the length of the web corresponding to the feed frequency. CONSTITUTION:The web 2 from the web raw roll 3 mounted on a web supply shaft 12 is supplied to a picture count apparatus 15 through edge and tension adjusting apparatuses 13, 14 and the feed frequency thereof is counted on the basis of the black boundary mark (specific pattern) of the web 2 in the feed direction thereof and, further, the number of the feed pictures of the web 2 with respect to a bobbin 1A are counted. Further, the feed length of the web 2 to the bobbin 1A is directly measured by a web length measuring apparatus 16. Then, the web length corresponding to the feed frequency of the specific pattern counted by a take-up controller 10A is compared with the length measuring result of the web 2 and, when the difference therebetween exceeds a tolerant value, it is judged that the detected feed quantity is not in a proper state and a web cutting/adhering apparatus 17 is operated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for detecting the feed rate of a web (flexible strip) made of synthetic resin, synthetic paper, metal, cloth, or the like.

[Prior art] Webs such as thermal paper for color printing are provided with screens of a certain length continuously in the longitudinal direction, and bar-shaped boundary marks (specific patterns) made of black or the like are provided between adjacent screens. ing.

When such a web is wound onto a winding bobbin, or when it is unwound from a winding bobbin and provided to a hardware device for web processing, the feed of the web is detected,
It is necessary to manage the amount of winding onto the winding bobbin and the amount of processing by hardware equipment.

Conventionally, the feed amount of the web has been measured by providing a length measuring roll that rotates in frictional contact with the web on the web pass line, and detecting the amount of rotation of this length measuring roll with a rotary encoder. .

[Problems to be Solved by the Invention] However, in the above-mentioned conventional feed amount detection method, the web and length measuring roll slide against each other due to the inertia of the sub-length roll, etc., and the actual web feed amount does not match the length measurement result. This may result in errors that are too long or too short. This impairs the accuracy of web winding, web processing, etc., and is not appropriate.

In addition, when detecting the feed rate of a web that has specific patterns such as boundary marks at regular intervals in the longitudinal direction of the web as described above, the number of feeds of the specific pattern of the web is counted, and the number of times the specific pattern that has been counted is calculated. It is also conceivable to detect the web length corresponding to the feed frequency as the feed amount.

However, in this case, due to the sensitivity of the counter that counts the specific pattern, when the color tone of the specific pattern is similar to the color tone of other parts of the web, a counting error occurs and the actual web There are difficulties in accurately detecting the feed rate with high reliability.

An object of the present invention is to accurately detect the feed amount of a web with high reliability in a web feed line in which specific patterns are provided at regular intervals in the longitudinal direction.

[Means for Solving the Problems] The present invention provides a web feed amount detection method in which specific patterns are provided at regular intervals in the longitudinal direction, in which the web feed length is measured and the web The feeding frequency of the above-mentioned specific pattern is counted, and the feeding length of the web subjected to AIl f+ is compared with the web length corresponding to the counted feeding frequency of the specific pattern, and the difference between the compared two lengths is calculated. Provided that it exceeds the predetermined tolerance range,
It is determined that the web feed (number X) is not in a proper state.

[Function] According to the present invention, if there is an error in the web length measurement result, there is a difference between the length measurement result and the web length corresponding to the counted number of feeds of the specific pattern, which exceeds the allowable value. If a difference occurs, it is determined that there is an abnormality in the detection state of the feed amount, and it is determined that the detected feed amount is not in an appropriate state.

In addition, if there is an error in the counting of a specific pattern, there will be a large difference exceeding the allowable value between the web length corresponding to the counted number of feeds of the specific pattern and the web length measurement result, and in this case, Also, it is determined that there is an abnormality in the detection state of the feed drop, and it is determined that the detected feed I-positive is not in a proper state.

Therefore, in a web feeding line in which specific patterns are provided at regular intervals in the longitudinal direction, the amount of feeding of the web can be detected accurately and with high reliability.

[Example] Fig. 1 is a front view schematically showing an example of a web winding device;
Figure 2 is a schematic diagram showing the bobbin loading/unloading section of the web winding device, Figure 3 is a schematic diagram showing the bobbin changing section of the web winding device, and Figure 4 is the winding section of the web winding device. A schematic diagram showing
FIG. 5 is a schematic diagram showing the winding work order of the web winding device;
FIG. 6 is a schematic diagram showing the web.

For example, as shown in FIG. 2(A), the web winding device 10 winds a certain amount of web 2 onto a primary winding bobbin IA from one end thereof, and transfers the web 2 to the primary winding bobbin IA. After winding is completed, a secondary winding bobbin IB is attached to the other free end. As shown in FIG. 6, the web 2 of this embodiment has □ cyan 2A and magenta 2A as color elements.
This thermal paper for color printing is provided with a color pattern in which B, yellow 2C and yellow 2C are arranged adjacently in the longitudinal direction to form one screen continuously in the longitudinal direction. Here, the web 2 is defined by black bar-shaped boundary marks (specific pattern) at constant intervals (standard length) between adjacent screens, thus in the longitudinal direction.
2D is provided.

The web winding section 2210 includes a winding controller 10A, a web supply motor 11, a web supply shaft 12, and an edge 7A straightening device 1.
3, a tension adjustment device 14, a screen counting device 15, a web length measuring device t16, a web cutting/bonding device 17, a web winding shaft 18, and a web winding motor 19.

The web winding device 10 also includes a bobbin charging/discharging device 21.
20, bobbin transfer device 21, bobbin exchange cradle 2
It has 2.

Hereinafter, a 1-cycle winding operation in which the web 2 is wound around the bobbin LA by the web winding device 10 and the bobbin IB is attached to the free end of the web 2 after winding will be described.

(2) A pallet 23 constituting the bobbin loading/unloading device 2o is conveyed from the loading stage 1 to the winding station with the bobbins 1A and IB held on loading pedestals 24A and 24B. The pobbin transfer device 21 includes pobbins IA and IB which have wound the web 2 onto chucks 25A and 25B.
is received from the web winding shaft 18 and the web cutting/bonding device 17 and conveyed (FIG. 2(A)).

Note that the bobbin transfer device 21 has a guide rod 2
6, a head 29 that moves up and down by a cylinder 28 supported by the saddle 27, four chucks 25A to 25D disposed on the head 29, and each chuck 25A supported by the head 29. It consists of four cylinders 30 that open and close 25D and a feed screw 32 that is rotated by a motor 31 to reciprocate the saddle 27.

■The bobbin transfer device i21 is the chuck 25A,
The above-mentioned pobbins IA and IB held in 25B after winding
are delivered to the ejection receivers 33A, 33B of the pallet 23, and at the same time, the pobbins IA, IB held on the loading receivers 24A, 24B of the pallet 23 are received by the chuck 25C125D (FIG. 2(B)).

After completing the operations in (1) and (2) above, the pallet 23 is transported from the winding station to the unloading station, and a new pallet 23 is carried into the winding station.

(3) Chuck 25D of bobbin transfer device 2221
Transfer the pobbin IB held in the bobbin transfer holder 22 to the pobbin exchange cradle 22 (Fig. 3(A)), and transfer this pobbin IB to the chuck 25B of the bobbin transfer device 21 (Fig. 3(A)).
B)).

(The small take-up controller 10A is activated when (a) a predetermined amount (constant number of surfaces N) of the web 2 is wound on the pobbin IA set on the web take-up shaft 18 in the previous cycle, or (b) When it is determined that the feed amount of the web 2 to the pobbin IA is not in an appropriate state, the web 9j cutting/bonding device 17 is activated.

That is, the web winding shaft 18 is driven and rotated by the web winding motor 19 while supporting the pobbin IA, and winds the web 2 under tension. At this time, the edge adjustment device 13 automatically adjusts so that the center portion of the web 2 is always conveyed in a state that coincides with the pass line center. The tension adjustment device 14 adjusts the tension acting on the web 2 by applying the gravity acting on the tension way 14A to the web 2 via the clutch 14B and the tension roll 14C as necessary.

The screen counting device 15 uses a sensor 15A made of a phototransistor to detect a change in color tone in the feeding direction of the web 2, that is, a black boundary mark? D is captured and its feeding frequency is counted, thereby counting the number of feeding screens of the web 2 with respect to the pobbin IA.

The web length measuring device 16 includes a length measuring roll L6A that rotates in frictional contact with the web 2, and a rotary encoder 16B that detects the amount of rotation of the length measuring roll 16A.
The feeding length of the web 2 relative to A is directly measured.

The winding controller 10A calculates a length corresponding to the feed length Lx of the web 2 measured by the web length measuring device 116 and the feed frequency n of the black boundary mark 2D counted by the screen counting device 15. Compare with Ly (=n*standing),
On the condition that the difference between the compared inner lengths Lx and Ly exceeds a predetermined tolerance value ΔL, it is determined that the feed amount of the web 2 is not in an appropriate state (abnormal).

The winding controller 10A makes a determination regarding the above-mentioned feed amount for each feed amount each time the screen counting device 15 counts a new l feed frequency (one screen), and also performs the determination regarding the feed amount for each feed amount each time the screen counting device 15 counts a new l feed frequency (one screen). After counting the frequency (N screen), perform the full feed rll, and
When it is determined that there is an abnormality in the feed +i) before the web 2 of a certain set amount (constant number of surfaces N) is wound up, the above-mentioned (b)
Operate the web cutting/vibration device as follows. Also,
The winding controller 10A also operates the web cutting/gluing device as described in (a) above even when a predetermined amount (-・regular number of surfaces N) of the web 2 is wound on the pobbin IA in an appropriate feeding state. Activate. Note that the web 2 whose winding is completed due to the operation of the web cutting/bonding device 17 due to abnormality determination of the feed amount is disposed of as a defective product.

The web cutting/bonding device 17 includes a cutting blade 34 that cuts the web 2 by moving transversely in the width direction of the web 2, and a cutting blade 34 that cuts the web 2 by cutting the web 2, and inserts new bobbins IA and IB on both sides of the cutting area of the web 2 when cutting/bonding the web 2. The left and right pressing holding parts 35 that press and hold the winding core IC and both ends of the cut web 2 are attached to the double-sided adhesive tape ID (see FIG. It consists of left and right adhesive holding parts 36 that are attached to The suppression holding section 35 includes a vacuum suction section 35A, and the adhesive holding section 36 includes a vacuum suction section 36A.
It is equipped with

That is, the web cutting/bonding 9W117 is first performed by the cylinder 37 using the suppressing holding portion 35. The entire adhesive holding section 36 is moved forward, and the pressing holding section 35 is set at the pass line of the web 2. At this time, the bobbin IB held by the chucks 25B and 25C of the bobbin transfer device W121,
Each winding core IC of the IA faces each pressing holding part 35 and pinches the N+1 screen part of the web 2 between each pressing holding part 35, and the chuck 25A of the pobbin transfer device 21 holds the web winding shaft. After winding is completed, the pobbin IA set at No. 18 is held (FIG. 4(A)).

Here, the N+1 screen part of the web 2 includes the vacuum suction part 35A of the suppression holding part 35 and the vacuum suction part 36A of the adhesive holding part 36.
continues to be adsorbed by

0) Next, the cutting blade 34 of the web cutting/bonding device 17 moves across the middle point of both pressing and holding parts 35 in the width direction of the web 2 by the operation of the cylinder 34A to cut the middle part of the N+1 screen part of the web 2. When cutting (FIG. 4(A)), both free ends of the web 2 to be cut and separated are held by suction by the vacuum suction section 36A of the adhesive holding section 36.

(6) Next, the left and right adhesive holding parts 36 of the web cutting/bonding device 17 are activated by the cylinder 38.
8 is released, the spring 39 moves forward by the elastic force of the spring 39, and both ends of the cut web 2, which has been attracted to the vacuum suction part 36A, are removed from the winding core 1c of the pobbins IA and IB.
Attach it to the double-sided adhesive tape ID provided on the
Figure (B)).

At this time, both free ends of the cut and separated web 2 are attracted to the vacuum suction part 38A of the adhesive strip holding part 36, and while maintaining the tension applied at the time of winding in step (2), the adhesive holding part 3
6, it gradually slides on the suction surface of the vacuum suction part 36A and reaches the adhesive curved part 36B with the same curvature as the double-sided adhesive tape ID provided on the winding core 1c of the corresponding bobbin LA, 1B. The tape is attached to the ID without wrinkles while being supported on the back. As a result, ■ one free end of the web 2 is attached as the winding end end for the secondary winding bobbin IB, and ■ the other free end of the web 2 is attached as the winding start end for the new primary winding bobbin IA. The first winding bobbin IA is then loaded in preparation for new winding onto the primary winding bobbin IA.

■The bobbin transfer device 21 chucks the bobbins IA and IB, which have become a pair after winding the web 2, to a chuck 25A.
, 25B, and the bobbin IA bonded with one end of the web 2 as the winding start end is held in the chuck 25C, and the bobbin IA held in this chuck 25C is set on the web winding shaft 18 (the fourth Figure (C)).

Note that the bobbin transfer device 121, which only holds the pobbins IA and IB after winding the web 2 on the chucks 25A and 25B, is the same as the pobbin loading/discharging device 21 in (2) above.
Return to 20.

(Ii) Pobin transfer! 1ta21 chuck 2
When the pobbin IA held by 5C is set on the web take-up shaft 18 as described above (FIG. 5(B)), it is attached to the web supply shaft 12 by the drive of the web supply motor 11. The web 2 is unwound from the web roll 3. The web 2 passes through the edge adjusting device 13, the tension adjusting device M14, the screen counting device 215, and the web length measuring device 16, and is wound onto the bobbin IA attached to the winding shaft 18 (FIG. 5(C), (D)).

As a result, when a predetermined amount of web 2 is wound onto the bobbin IA, one cycle of winding work is completed, and the web 2 is wound onto the bobbin IA.
The pobbin IA that has been wound up is subjected to the work (2) above in the next cycle.

Next, the operation of the above embodiment will be explained.

According to the above embodiment, when there is an error in the length measurement result of the web 2, the length measurement result Lx and the web length ty corresponding to the feeding frequency of the counted specific pattern (black boundary mark 2D) are calculated. A large difference exceeding the allowable value ΔL occurs between
It is determined that there is an abnormality in the detection state of the feed amount, and it is determined that the detected feed amount is not in an appropriate state.

In addition, if there is an error in counting the specific pattern (black boundary mark 2D), the web length L7 corresponding to the counted specific pattern feeding frequency and the length measurement result Lx of the web 2
In this case, it is determined that there is an abnormality in the detection state of the feed amount, and that the detected feed amount is not in an appropriate state.

Therefore, the amount of feed of the web 2 can be accurately detected with high reliability on the feed line of the web 2 in which the specific patterns (black boundary marks 2D) are provided at regular intervals in the longitudinal direction.

Note that the present invention is also applicable to detecting the feed amount of a web having a specific pattern other than a boundary mark.

[Effects of the Invention] As described below, according to the web feed amount detection method according to the present invention, in the web feed line in which specific patterns are provided at regular intervals in the longitudinal direction, the web It is possible to accurately detect the feed amount with high reliability.

[Brief explanation of the drawing]

FIG. 1 is a front view schematically showing an example of web winding device No.
Figure 2 is a schematic diagram showing the bobbin loading/unloading section of the web winding device, Figure 3 is a schematic diagram showing the bobbin changing section of the web winding device, and Figure 4 is the winding section of the web winding device. A schematic diagram showing
FIG. 5 is a schematic diagram showing the winding work order of the web winding device;
FIG. 6 is a schematic diagram showing the web. 2... Web, 2D... Boundary mark (specific pattern), 10... Web winding device, IOA... Winding controller, 15... Screen counting device, 16... Web length measurement Device. Agent Patent Attorney Osamu Shiokawa Figure 2 (A) (B) Figure 3 (A) (B) Figure 4 Figure 5 Circle Figure 6

Claims (1)

[Claims] (1) In a method for detecting the feed rate of a web in which specific patterns are provided at regular intervals in the longitudinal direction, the feed length of the web is measured, and the number of times the web is fed in the specific pattern is counted; The measured web feed length is compared with the web length corresponding to the counted specific pattern feed frequency, and the condition is that the difference between the two compared lengths exceeds a predetermined tolerance range. A method for detecting a web feed amount, characterized in that it is determined that the web feed amount is not in an appropriate state.