JP3133037B1 - Automatic splicing control method - Google Patents

Abstract

The present invention relates to an automatic paper splicing control method, in which the length of a saw blade can be extended by shortening a tail length to reduce waste paper and preventing an overlap between a gluing position and a cutting position. SOLUTION: When the diameter of a web roll 20 being fed becomes smaller than a predetermined value, a glue is prepared at a start end and a web 21 is pressed by a pressing means 2 toward a start end of a new web roll 22 rotating at a predetermined speed. When the web is automatically spliced from the web roll 20 being fed to a new web roll 22 by cutting the upstream side of the pasting position of the web 21 by the cutting means 3 while pressing the
Before the pressing means 2 is operated, a deviation amount between the gluing position by the pressing means 2 on the web 21 and the cutting position by the cutting device 9 provided on the downstream side is predicted, and the predicted gluing position, cutting position and If the deviation amount is smaller than the predetermined value, the operation of the pressing means 2 is prohibited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an automatic splicing control method for a rotary printing press, and more particularly to an automatic splicing control method in which a gluing timing is associated with a cutting timing of a cutting device.

[0002]

2. Description of the Related Art A rotary printing press is provided with a supply device for supplying a web to a printing unit at the uppermost stream of a printing line. The supply device is equipped with a web roll on which the web is wound, and the web is continuously fed from the web roll. Since the web wound on the web roll is finite, it is lost during continuous feeding.However, the feeding device performs web splicing from the web roll being fed to a new web roll. Exchanges for a new web roll without stopping.
An automatic splicing apparatus is an apparatus for automatically splicing a web roll being fed out to a new web roll.

FIG. 6 is a diagram showing a hardware-related arrangement and a control system of a conventional automatic paper splicing apparatus. As shown in FIG. 6, the automatic splicing device 1 includes a brush 2 and a cutter 3 and is provided on a running line of a web 21 fed from a web roll 20. On the opposite side of the running line of the web 21, a new web roll indicated by reference numeral 22 is provided. The web roll 22 is the web (new web) 23
Glue is prepared at the beginning of the (ie, glue is attached)
The automatic web splicing apparatus 1 is configured to splice the new web 23 to the old web 21 by pressing the running web (old web) 21 against the start end of the new web 23 with the brush 2. After the splicing, the old web 21 is cut by the cutter 3 to change the web feeding source from the old web roll 20 to the new web roll 22.

[0004] The web 21 (23) supplied from the web roll 20 (22) is printed in a printing unit and then sent to the folder 5. In the folding machine 5, after the web 21 (23) is folded into two by the triangular plate 6, perforations are made at equal intervals in the width direction by a perforation device (not shown) as shown in FIG. Then, the web 21 (23) cut between the saw cylinder 9 and the folding cylinder 7 in the width direction by a saw blade (not shown) provided on the saw cylinder 9 and the cut web 21 (23) is further cut. A folding blade (not shown) provided on the folding drum 5 folds the sheet in accordance with the perforation and discharges the signature to the sheet discharge conveyor 11 as a signature.

When the new web 23 is spliced to the old web 21, the old web 21 is cut by the cutter 3. At this time, the portion where the new web 23 is spliced is cut by the cutter 3. A tail is formed until. This tail also travels on the line together with the web 21 (23) and is sent to the folding machine 5. At this time, as shown in FIG. 7, when the tail is cut at a position in the first half of the folding position across the trimming position, a trouble such as a paper jam occurs when the tail is cut by the saw cylinder 9. There is a fear.

Therefore, the control device 12 for controlling the automatic splicing device 1 accurately controls the timing of cutting the old web 21 by the cutter 3 without being affected by the fluctuation of the machine speed, thereby preventing an error in the cutting position. The optimum gluing timing is calculated based on the pulse signal 13a from the glue position sensor 13 indicating the glue position of the new web roll 22, and based on the pulse signal 10a from the saw blade position sensor 10 indicating the position of the saw blade in the saw cylinder 9. The optimum cutter timing is calculated, and a gluing command signal 12a for operating the brush 2 and the cutter 3 is output to the automatic paper splicer 1. Hereinafter, an automatic splicing control method in the conventional automatic splicing apparatus 1 will be described in detail.

First, in the control device 12, the glue position sensor 1
New web roll 22 based on pulse signal 13a from
The rotation cycle (time) of is measured. And the pulse signal 1
The optimum brush time for pressing the brush 2 from the edge of 3a is calculated, and the pulse signal 10a from the saw blade position sensor 10 is calculated.
The cutter optimum time for operating the cutter 3 from the edge of is calculated. At this time, the old web 21
The correction time from the edge of the pulse signal 10a is added so that the tail formed when is cut behind the folding position.

The old web roll 20 being fed out
When the final diameter signal indicating that the diameter of the brush 2 has reached the final diameter is input and the brush 2 and the cutter 3 can be activated, the above-mentioned brush optimum time and cutter optimum time are set in a timer. After the timer is set, the counting of the brush timer is started at the edge of the pulse signal 13a, and the counting of the cutter timer is started at the edge of the pulse signal 10a.
Then, after each count is completed, the glue command signal 12a is output to the automatic paper splicer 1 to operate the brush 2 and the cutter 3, respectively.

[0009]

As described above, in the conventional automatic paper splicing control method, the optimum cutter timing is calculated based on the pulse signal 10a from the saw blade position sensor 10 to operate the cutter 3, whereby the machine is operated. The tail is cut at an accurate cutting position without being affected by fluctuations in speed, thereby preventing a paper jam in the saw cylinder 9. However, in the above-described conventional automatic paper splicing control method, although the cutter timing and the saw blade timing are linked, the gluing timing and the saw blade timing are not linked, and therefore, as described below. There were challenges.

First, the tail length at the time of setting the optimum cutter time needs to have a margin of at most one round with the diameter of the saw cylinder 9, but the gluing timing and the saw blade timing are not linked. As a result, the start of the brush timer for operating the brush 2 and the start of the cutter timer for operating the cutter 3 are deviated, and factors such as a variation in the path length of the web are added. As a result, the tail length is 2 to 5 sheets. There was a problem that it would be long. In addition, since the gluing timing and the saw blade timing are not linked, the saw blade position and the perforation position overlap with the gluing position, shortening the life of the saw blade, or causing a paper jam due to the web being caught by the sewing machine. There was also a problem that it was easy to occur.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and reduces the length of the tail by shortening the tail length, and also prevents the overlap between the gluing position and the cutting position to extend the life of the saw blade. It is an object of the present invention to provide an automatic splicing control method which enables the above.

[0012]

According to a first aspect of the present invention, there is provided an automatic paper splicing control method according to the present invention, wherein a diameter of a web roll during feeding of a web toward a downstream printing unit is predetermined. When the value becomes equal to or less than the value, a paste is prepared at the starting end of the new web roll, and the web is pressed and glued by pressing means toward the starting end of the new web roll rotating at a predetermined speed. In an automatic splicing control method for automatically splicing a web roll during feeding from the web roll being fed to the new web roll by cutting the upstream side of the gluing position by cutting means, the actuation of the pressing means is performed before the pressing means is operated. A shift amount on the web between a gluing position and a cutting position provided by a cutting device provided at a further downstream side of the printing unit and operating at a predetermined cycle ;
Sewing machine that operates in synchronization with the gluing position and the cutting device
Of the perforation position on the web, and the predicted deviation amount between the gluing position and the cutting position or
When the amount of deviation between the position and the perforation position with該糊is less than each predetermined value, when prohibiting the operation of pressing with means Tomo
When operating the pressing means, the cutting means is
The cutting position when operated simultaneously with the gluing means is the gluing position.
Predict whether they are located within the same trimming length and the cutting position is
If it is predicted not to be within the same trimming length as the attached position
Indicates that the cutting position sandwiches the perforation position within the next trimming length.
Operating the cutting means so that it is located in the rear half
It is characterized by correcting the bug .

According to a second aspect of the present invention, there is provided an automatic sheet splicing control method according to the first aspect.
The running length of the web from the pressing means to the cutting device is calculated, the running speed of the web is detected, and the running length, the running speed, the rotation cycle of the new web roll, and the operation of the cutting device are calculated. The amount of deviation between the sizing position and the cutting position on the web based on the cycle , the sizing position and the
It is characterized by estimating the amount of deviation from the corner position .

[0014]

According to a third aspect of the present invention, there is provided the automatic splicing control method according to the first or second aspect, wherein the diameter of the web roll during the feeding becomes smaller than a predetermined value. The present invention is characterized in that the number of arrivals of the gluing timing is counted, and when the number of arrivals of the gluing timing exceeds a predetermined limit number, the inhibition of the operation of the pressing means is released.

[0016]

[0017]

Embodiments of the present invention will be described below with reference to the drawings. First, an automatic sheet splicing control method according to a first embodiment of the present invention will be described with reference to FIGS. It is to be noted that the same parts as those of the above-described conventional one are denoted by the same reference numerals in the drawings.

FIG. 1 is a diagram showing a hardware-related arrangement and a control system of an automatic splicing apparatus to which the present automatic splicing control method is applied. As shown in FIG. 1, an automatic splicing device 25 to which the present automatic splicing control method is applied includes a brush (pressing means) 2, a cutter (cutting means) 3, a control device 26 for controlling these, and various sensors. It is composed of This automatic paper splicing control method controls the tail length by accurately associating the gluing timing by the brush 2 and the cutting timing with the saw cylinder 9 which have not been related to each other, thereby controlling the tail length and setting the gluing position to the saw blade position. (Trimming position). Therefore, as the sensors, a pulse signal 1 indicating the gluing position of the new web roll 22 is used.
A glue position sensor 13 that outputs 3a, a saw blade position sensor 10 that outputs a pulse signal 10a indicating the position of the saw blade in the saw cylinder 9, and a position sensor 17 that outputs a signal 17a that indicates the position of the floating roller 16. , Web 21 (2
3) a mechanical speed sensor 15 that outputs a signal 15a indicating the traveling speed (mechanical speed), a position sensor 14 that outputs a signal 14a indicating the position of the compensator roller 18, and the like. By appropriately processing the signals in the control device 26, the optimum gluing timing and the optimal cutter timing are calculated, and a gluing command signal 26a is output to the brush 2 and the cutter 3.

Hereinafter, the automatic sheet splicing control method will be described with reference to FIGS. FIG. 2 is a flowchart showing the flow of this control, and FIG. 3 is a pulse signal 13a indicating the gluing position, a pulse signal 10a indicating the saw blade position, and FIG.
It is a timing chart (horizontal direction is time) which also shows the time change of the signal 15a which shows a machine speed. FIG.
FIGS. 4A and 4C are plan views showing the relationship between the gluing position and the tail length on the web 21 (23) when cut by the saw cylinder 9, and FIGS. 4B and 4D. ) Respectively show in FIG.
FIG. 4C is a side view corresponding to FIG. 4C, and FIG. 4E is a diagram illustrating the pulse signal 10a indicating the saw blade position, and the horizontal axes thereof coincide with each other.

First, the control device 26 detects the diameter of the web roll 20 during web feeding and determines whether or not the diameter has decreased to a predetermined value (step A100). A glue mode signal (paper splicing start signal) for starting the paper splicing to a new web roll 22 for preparing the glue is transmitted (step A11).
0).

When the gluing mode signal is transmitted, the running web length from the brush 2 to the saw cylinder 9 is calculated. This length is basically determined by the travel paper pass line. For example, the length is determined by the web root I or II shown in FIG. This length also varies depending on the position of the compensator roller 18. Furthermore, there is a dynamic fluctuation due to the fluctuation of the floor roller 16 and the correction movement of the compensator roller 18. Therefore, the control device 26 calculates the running web length at the time of paper splicing based on the setting of the web route and the signal 17a from the position sensor 17 and the signal 14a from the position sensor 14. When the web route is fixed by a machine, the signal 17a from the position sensor 17 is used.
May be used to correct only the dynamic fluctuation of the floating roller 16 (step A120).

After the running web length is calculated, the positional relationship (shift amount) between the gluing position and the saw blade position on the web 21 (23) is predicted. In order to make this prediction, it is necessary to find the timing relationship between the pulse signal 13a indicating the gluing timing and the pulse signal 10a indicating the saw blade timing (cutting timing).
The phases of a and 10a are not the same, and the phases shift with the rotation of the machine as shown in FIG. This phase shift is due to the relationship between the diameter of the web roll 22 and the diameter of the saw cylinder 9, and changes with the rotation of the machine unless the diameter of the web roll 22 is an integral multiple of the diameter of the saw cylinder 9.

Therefore, in order to grasp this phase shift, the control unit 26 calculates the difference between the previously measured phase difference and the currently measured phase difference every time the pulse signal 13a from the glue position sensor 13 is input. The phase change rate is obtained, and the amount of phase shift after that is predicted and calculated. And the control device 26
The operation time from when the glue command signal 26a is output to the brush 2 to the actual pressing of the web 21 and the delay time until the glue position reaches the saw cylinder 9 are converted into a phase difference, and the phase difference is calculated. Is added to the deviation amount, and the deviation amount on the web 21 (23) between the gluing position and the saw blade position is predicted. Note that the delay time is calculated based on the traveling web length and the machine speed calculated in step A120 (hereinafter, step A120).
130).

When the amount of deviation between the gluing position and the saw blade position is predicted, next, as shown in FIG. The prohibited area M is set (Step A140), and it is determined whether or not the predicted gluing position 41 is within the gluing prohibited area M (that is, whether or not the predicted shift amount is within a predetermined value) (Step A150). If the gluing position 41 deviates from the gluing prohibited area M, step A
Proceeding to 190, the optimum brush time for pressing the brush 2 from the edge of the pulse signal 13a indicating the gluing position is calculated.

On the other hand, if the gluing position 41 is within the gluing prohibited area M, the operation of the brush 2 is prohibited by the interlock control, and the automatic paper splicing is suspended (step A16).
0). While the interlock is being performed, the number of times that the glue timing has arrived since the glue mode signal was output is counted (step A170). And
It is determined whether or not the count number has reached a predetermined limit number (for example, two times) (step A180). When the count value reaches the predetermined value, there is a possibility that there is no remaining paper on the web roll 20 being fed. Even if the predicted gluing position 41 is within the glue position prohibition area M, the interlock by the prohibiting unit 35 is released, and the process proceeds to step A190, where the operation control unit 32 presses the brush 2 from the edge of the pulse signal 13a. Is calculated. Note that the limit number can be set arbitrarily.

After calculating the optimum brush time in step A190, the cutting position (cutting position) of the web 21 by the cutter 3 when the cutter 3 is operated simultaneously with the brush 2 is predicted. Then, the predicted cut position 42
Is the same cutting length L as the gluing position 41 as shown in FIG.
It is determined whether it is within (Step A200). If the predicted cut position 42 is within the same cutting length L, step A22
The process proceeds to 0, and the cutter optimum time for operating the cutter 3 is set in accordance with the brush optimum time.

On the other hand, as shown in FIG. 4C, when the predicted cut position 42 extends over two or more cut lengths L, L (not within the same cut length L), the process proceeds to step A210 and the brush When the cutter 3 is operated at the same time as Step 2, it is determined whether or not the cutting position 42 is located outside the cutter impossible region between the saw blade position 40 and the folding position 43. If the cutting position 42 is located outside the cutter impossible area, the process proceeds to step A220, and the cutter optimum time for operating the cutter 3 is set in accordance with the brush optimum time.

If the cut position 42 is located within the cutter impossible area, the process proceeds to step A230, where the cut position 42 is set.
Is corrected to the cutter optimum time set in accordance with the brush optimum time so that is located behind the folding position 43. At this time, it is preferable that the cutting position 42 is substantially at the center of the latter half area of the cutting length L (for example, the tip side saw blade position 4 of the cutting length L).
(Within a range of 0% to 75% ± 15%) so as not to cover the non-cuttable area 25.

When the optimum cutter time is set in step A220 or A230, the timer is set together with the optimum brush time calculated in step 190. After the timer is set, each timer starts counting at the edge of the pulse signal 13a. Then, after each count is completed, the glue command signal 26a is output to operate the brush 2 and the cutter 3 respectively (step A240).

As described above, according to the automatic splicing control method,
Since the gluing timing by the brush 2 and the cutting timing by the saw cylinder 9 which have not been related to each other are accurately related, the gluing positions 41, 41 on the web 21 (23) are set.
The position control of the cutting position 42 and the saw blade position 40 can be performed with high accuracy, and there is an advantage that the tail length can be suppressed to within two sheets of the cutting length L and the waste paper can be reduced.

Further, since the gluing position 41 can be reliably removed from the saw blade position 40, there is an advantage that the life of the saw blade of the saw cylinder 9 can be extended. Further, when the number of times of the sizing timing after the sizing mode signal is output reaches a predetermined value, the interlock is released even when the predicted sizing position 41 is within the sizing prohibited area M. Since the automatic paper splicing is started in this manner, there is also an advantage that the remaining paper of the web roll 20 being fed can be prevented from being exhausted.

Next, an automatic sheet splicing control method according to a second embodiment of the present invention will be described. The hardware-related arrangement and control system of the automatic splicing apparatus to which the present automatic splicing control method is applied are the same as those in the first embodiment, and are shown in FIG. This automatic paper splicing control method is different from the automatic paper splicing control method of the first embodiment in that, in addition to the gluing timing by the brush 2 and the cutting timing by the saw cylinder 9, the sewing machine timing by a sewing machine (not shown) is also accurate. It is different in that it is related to

The sewing machine is a device for making a perforation in the width direction in accordance with the position where the fold is made by the folding cylinder 7, and is provided between the triangular plate 6 and the saw cylinder 9 on the web running line. In conjunction with the saw cylinder 9, perforations are formed at regular intervals with respect to the saw blade position. Therefore, the sewing machine timing is calculated based on the pulse signal 10a output from the saw blade position sensor 10.

The automatic sheet splicing control method will be described below with reference to the flowchart shown in FIG. 5 and FIG. 4 used in the description of the first embodiment. In FIG. 5, each step is numbered B, and the step of each number performs the same process as the corresponding numbered step in FIG. First, the control device 26 detects the diameter of the web roll 20 during web feeding and determines whether or not this diameter has decreased to a predetermined value (step B100). When the diameter has decreased to the predetermined value, glue is prepared at the start end. New web roll 2
Then, a gluing mode signal (paper splicing start signal) for starting the paper splicing to No. 2 is transmitted (step B110).

Next, web route setting and position sensor 1
7a and the signal 14a from the position sensor 14
Then, the running web length from the gluing position to the saw blade position at the time of paper splicing is calculated (step B120). When the running web length is calculated, the web 21 (2) between the gluing position and the saw blade position is calculated.
3) Predict the positional relationship (displacement) on the web and the positional relationship (displacement) on the web 21 (23) between the gluing position and the perforation position. That is, each time the pulse signal 13a from the glue position sensor 13 is input, the previously measured pulse signal 1a
A phase change rate between the phase difference between the pulse signal 3a and the pulse signal 10a and the phase difference measured this time is obtained, and the subsequent phase shift amount between the two is predicted and calculated.

The operation time from when the gluing command signal 26a is output from the control device 26 to the brush 2 until the web 21 is actually pressed and the delay time until the gluing position reaches the saw cylinder 9 are determined. The web 21 (2) between the gluing position and the saw blade position is converted into a phase difference and added to the above-described phase shift amount.
3) Predict the above shift amount. Web 21 (2
3) Since the positional relationship between the saw blade position and the perforation position is set to be constant, the perforation position is calculated from the predicted saw blade position, and the web 21 between the gluing position and the perforation position is calculated.
(23) Predict the deviation amount (above, step B1
30).

When the shift amount between the gluing position and the saw blade position and the shift amount between the glue position and the perforation position are predicted, next, as shown in FIG. , A glue-forbidden area M, which is a phase area where gluing is to be avoided, is set, and a perforation position (corresponding to the folding position 43) 44 is set.
Is set also around the area (step B1).
40). Then, first, it is determined whether or not the predicted gluing position 41 is within the gluing prohibition region M (that is, whether or not the shift amount of the gluing position with respect to the predicted saw blade position is within a predetermined value) (step B150). .

If the gluing position 41 deviates from the gluing prohibited area M, the process proceeds to step B155, and further, whether the predicted gluing position 41 is within the gluing prohibited area N with respect to the perforation position (ie, the predicted sewing machine). It is determined whether or not the shift amount of the gluing position with respect to the eye position is within a predetermined value (step B15).
5). Here, when the gluing position 41 is out of the gluing prohibited area N, the process proceeds to step B190.

On the other hand, when the gluing position 41 is within the gluing prohibited area M or the gluing prohibited area N, the operation of the brush 2 by the operation control means 32 is prohibited by the interlock control, and the automatic paper splicing is started. Postponing (step B160).
While this interlock is being performed, the number of times that the glue timing has arrived since the glue mode signal was output is counted (step B170). Then, it is determined whether or not the count number has reached a predetermined limit number (for example, two times) (step B180). When the count value reaches the predetermined value, there is a possibility that the remaining paper of the web roll 20 being fed out may be exhausted. Even if the predicted gluing position 41 is within the glue position prohibition area M or the glue position prohibition area N, the interlock is released and the process proceeds to step B190. Step B19
The processing contents after 0 are the same as the processing contents after step A190 shown in FIG. 2 of the first embodiment.

As described above, according to the automatic paper splicing control method of this embodiment, the same effects as those of the first embodiment can be obtained, and in addition to the gluing timing by the brush 2 and the cutting timing by the saw cylinder 9, Since the sewing machine timing is accurately associated with the sewing machine, the position control of the gluing position 41, the cutting position 42, the saw blade position 40, and the perforation position 44 on the web 21 (23) is performed with high accuracy. Accordingly, there is an advantage that the tail length can be suppressed to two or less of the trimming length L and the waste paper can be reduced.

Also, since the gluing position 41 can be reliably removed from the saw blade position 40, the life of the saw blade of the saw cylinder 9 can be extended, and the gluing position 41 can be reliably formed from the perforation position 44. Therefore, there is also an advantage that paper jam at the time of perforation processing can be reduced. As described above, the two embodiments of the automatic paper splicing control method of the present invention have been described. However, the present invention is not limited to each of the above-described embodiments, and may be variously modified without departing from the spirit of the present invention. can do. For example, in each of the above-described embodiments, the running length of the web from the brush 2 to the saw cylinder 9 is calculated, the running speed of the web is detected, and the running length of the web, the running speed, and the gluing of the new web roll 22 are performed. Pulse signal 13a indicating the position, pulse signal 10 indicating the saw blade position
a, the amount of deviation between the gluing position and the cutting position on the web is accurately predicted, but the method of predicting the amount of deviation between the gluing position and the cutting position is not limited to this. Instead, it is also possible to make the prediction based on only the pulse signal 13a and the pulse signal 10a, assuming that the running length and the running speed of the web are constant.

[0042]

As described above in detail, according to the automatic web splicing control method of the present invention (claim 1), cutting timing and cutting at the timing the cutting device sizing according pressing means it was not associated with conventional Sewing machine that operates in synchronization with the machine
It is possible to associate the sewing timing of the apparatus accurately sizing position on the web, the cutting position, it is possible to control the position of the cutting position and perforation position with high accuracy, thereby the tail with cutting device Paper when section is cut
Clogging can be prevented and tail length is trimmed.
Within the cutting position, the glue position can be reliably removed from the trimming position to extend the life of the saw blade of the cutting device, and the glue position can be reliably determined even from the perforation position.
Can be removed to reduce paper jams during perforation
There is an advantage of that.

In particular, the running length of the web from the pressing means to the cutting device is calculated, the running speed of the web is detected, and the running length, the running speed, the rotation cycle of the new web roll, and the operating cycle of the cutting device are calculated. The amount of deviation between the gluing position and the cutting position on the web, the gluing position and the perforation position
In the case of estimating the amount of misalignment , the gluing timing, the cutting timing, and the perforation timing can be more accurately associated, and the position control of the gluing position, the cutting position, and the cutting position on the web is further improved. There is an advantage that it can be performed with high accuracy (claim 2).

[0044] is et al., When the diameter of the web roll in the unwinding releases the prohibition of the operation of the pressing means when the arrival times of the glue application timing from becoming below a predetermined value exceeds a predetermined limit number Has an advantage that the remaining paper of the web roll during feeding can be prevented from disappearing (claim 3 ).

[0045]

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a hardware-related arrangement and a control system of an automatic splicing apparatus to which an automatic splicing control method according to a first embodiment of the present invention is applied.

FIG. 2 is a flowchart illustrating an automatic splicing control method according to the first embodiment of the present invention.

FIG. 3 is a timing chart of input signals according to the automatic paper splicing control method according to the first embodiment of the present invention.

FIGS. 4A and 4B are explanatory diagrams for explaining an automatic paper splicing control method as a first embodiment of the present invention, wherein FIGS. 4A and 4C are sizing on a web when cut by a saw cylinder; FIGS. FIG. 4 is a plan view showing the relationship between the position and the tail length, (b) and (d) are side views respectively corresponding to (a) and (c), and (e) is a diagram showing a pulse signal indicating a saw blade position.

FIG. 5 is a flowchart illustrating an automatic sheet splicing control method according to a second embodiment of the present invention.

FIG. 6 is a diagram illustrating a hardware-related arrangement and a control system of an automatic splicing apparatus to which a conventional automatic splicing control method is applied.

FIG. 7 is an explanatory diagram for explaining a conventional automatic paper splicing control method.

[Explanation of symbols]

 Reference Signs List 2 brush (pressing means) 3 cutter (cutting means) 5 folder 9 saw cylinder (cutting device) 10 saw blade position sensor 10a pulse signal 13 gluing position sensor 13a pulse signal 15 machine speed sensor 15a signal 20 web roll (during feeding) 21 and 23 web 22 web roll (new web roll) 24 tail 26 control device 26a gluing command signal 25 automatic paper splicing device 40 saw blade position (cutting position) 41 gluing position 42 cutting position (cutting position) ) 43 Folding position 44 Perforation position M Glue prohibited area N Glue prohibited area L Trim length I, II Webroot

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65H 19/18 B65H 19/20

Claims (3)

(57) [Claims] When the diameter of a web roll during feeding of a web toward a downstream printing unit becomes smaller than a predetermined value,
A glue is prepared at the starting end of the new web roll, and the web is pressed and glued by pressing means toward the starting end of the new web roll rotating at a predetermined speed.
In the automatic splicing control method for automatically splicing a web roll during feeding from the web roll being fed to the new web roll by cutting the upstream side of the gluing position of the web by cutting means, the pressing means is operated. The amount of deviation on the web between the pasting position and the cutting position provided by the cutting device provided at a further downstream side of the printing unit and operating at a predetermined cycle.
And a sewing machine that operates in synchronization with the gluing position and the cutting device.
The shift amount on the web from the perforation position by the device is predicted, and the shift amount between the predicted gluing position and the cut position or the glue is estimated.
When the amount of deviation between the attachment position and the perforation position is equal to or less than a predetermined value, the operation of the pressing means is prohibited , and when the pressing means is operated, the cutting means is pressed by the pressing hand.
The cutting position when operating simultaneously with the step is the same as the gluing position
The cutting position is predicted to be within the cutting length, and the cutting position must be within the same cutting length as the gluing position.
If measured, the cutting position is
The cutting means so as to be located in the rear half of the joint position.
Automatic splicing control method, wherein the operation timing of the sheet is corrected . 2. The travel length of the web from the pressing means to the cutting device is calculated, the travel speed of the web is detected, and the travel length, the travel speed, and the rotation cycle of the new web roll are calculated. Based on an operation cycle of the cutting device, a shift amount between the gluing position and the cutting position on the web ,
2. The automatic paper splicing control method according to claim 1, wherein a shift amount between the gluing position and the perforation position is predicted. 3. Counting the number of times the sizing timing has arrived since the diameter of the web roll being fed out has become equal to or less than a predetermined value, and if the number of sizing times has exceeded a predetermined limit number. 3. The automatic sheet splicing control method according to claim 1, wherein the prohibition of the operation of the pressing means is released.