JPH10305948A - Paper splicing control method and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper splicing control method and its device, capable of taking a span of timing lying between a cutter and a folder surely by measuring any operational delay in a paper splicer actually, and comparing the measured value and the reference value. SOLUTION: In this paper splicing control method, a roll 4 in one side is accelerated in advance by a predriver as delivering a web from a roll 3 on the other, while a binder 10 stuck to a web tip of the roll 4 is forcibly pressed to the web to be delivered from the roll 3 for adhesiveness, and subsequently, a cutter 9 is forcibly pressed to the web at the more rear side than a bonding part to be delivered from the roll 3, cutting this web. In this case, an operational delay (t) or time ranging from an operating command to operate the cutter 9 to that operation of the cutter 9 is actually completed is measured, while a preset reference value T is compared with the actually measured operational delay (t).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a splicing control method and a splicing control method used in a flying type automatic splicing apparatus for performing splicing operations between a plurality of rolls at high speed.

[0002]

2. Description of the Related Art For example, in a machine such as a rotary printing press that uses a web wound out of a roll, the automatic web splicing device can be used to stop the current winding without stopping the operation of the machine. When the unloading roll (hereinafter referred to as the old roll) approaches the end, the paper is automatically spliced to the next new roll (hereinafter referred to as the new roll) and the operation is continued.

In a flying-type automatic splicing apparatus, two or three rolls are provided on a turret arm so as to be freely rotatable in order to supply a web to a rotary printing press or the like, and an old roll at an unwinding position is unwound. When the end is near the end, the turret arm is rotated to move the new roll to the paper splicing position, and then the pre-drive device rotates the new roll in advance, and the surface speed is adjusted to the running speed of the web being unwound (line Speed), and then press the adhesive of the old roll against the adhesive material attached to the leading end of the web of the new roll, for example, the double-sided tape with the adhesive roll, and apply the adhesive behind the adhesive. This is to cut the web that is unwound from the old roll on the side by a cutter.

Incidentally, the position of the double-sided tape at the leading end of the web of the new roll is detected by a tape position sensor. After the position of the double-sided tape is detected by the tape position sensor, when the new roll rotates by a set angle. , The adhesive roll is configured to operate.

[0005] The web spliced by the above-mentioned automatic splicing device of the flying type is then printed by a rotary printing machine or the like, cut at regular intervals by a trimming device, and further cut by a folding machine. It is generally folded. The conventional automatic splicing device is controlled independently of the cutting device, and the automatic splicing device and the cutting device are not timed. For this reason, there was a possibility that the web was cut at the connection portion.

However, since the connecting portion of the web is connected by a double-sided tape, it is thicker than other portions,
For this reason, the cutting device has poor crispness and causes a paper jam. Thus, conventionally, such inconvenience has been dealt with by making the double-sided tape thinner. However, as the running speed of the web becomes higher, such a method is no longer sufficient.

[0007] The web cut at regular intervals is folded into two by a folding machine, but when the connecting portion of the web is folded, the portion becomes thick due to the double-sided tape, which causes a paper jam. Had become. Furthermore, since the web is doubly overlapped at the till end left behind by the cutter from the connection portion of the web, when the portion is cut, the till end behind the cut position is cut off, Paper jams were sometimes caused by being bitten by a cutting device or other machine.

[0008] Further, in some paper splicing apparatuses, there is a type in which the til length is controlled in synchronization with a folding machine.
When the speed changes, the timing shifts, the tilled end becomes longer, and the printing unit may be adversely affected by paper jam or the like (Japanese Patent Laid-Open No. 2-48359).

In view of the above, we have proposed a splicing control device that can control the splicing device in accordance with the timing of cutting, thereby avoiding the cutting of the web connection portion and the end of the til, and preventing the occurrence of a paper jam. (JP-A-6-14466)
No. 2) has already been developed, and furthermore, by controlling according to the timing of the folding machine, the separated till end can be folded to prevent the occurrence of a paper jam (Japanese Unexamined Patent Publication No. No. 81811) has already been developed.

[0010]

As described above, the splicing control device developed by the present inventors (Japanese Patent Laid-Open No. Hei 6-144662).
No.), according to the timing of cutting in the cutting device,
Because the splicing of the web is performed, the connected portion of the web is not cut or folded, so that the occurrence of a paper jam is prevented and the printing speed is improved. Can be.

Further, a splicing control device for cutting a web according to the timing of a folding machine (Japanese Patent Laid-Open No. 7-81811).
According to this, even in the case of high-speed operation, since the till end is folded by the folding machine, there is an advantage that there is no possibility that the till end will fall off during the subsequent transportation. However, in an actual paper splicing apparatus, the time from the operation command to the actual completion of the operation, that is, an operation delay is involved. Therefore, the operation delay is predicted (or estimated) in advance, and the operation delay is expected. At present, the timing with the cutting device and folding machine is taken.

[0012] However, the cause of the operation delay is unknown, but it may occasionally deviate significantly from the expected value. For example, if the operation delay of the adhesive roll or cutter deviates significantly from expected, the timing of splicing or cutting the web will deviate, and, very rarely, the tilled end of the web will not be folded by the folding machine and In some cases, causing paper jams.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and measures an operation delay in a paper splicing apparatus and compares the measured value with a reference value. It is an object of the present invention to provide a splicing control method and apparatus that can take timing with a folding machine.

[0014]

A web splicing control method according to the present invention for achieving the above object is to advance a web from one roll while accelerating the other roll in advance by a pre-drive device, and A flying-type paper splicing device in which an adhesive attached to the web tip of the other roll is pressed against and bonded to the fed web, and then a cutter is pressed against the web behind the bonded portion fed from the one roll to cut the web. In the control method, while measuring an operation delay which is a time from an operation command for operating the cutter to an actual completion of the operation of the cutter, a preset reference value and an actually measured operation delay are determined. It is characterized by comparing.

A web splicing control device according to the present invention, which achieves the above object, preliminarily accelerates the other roll by a pre-drive device while feeding out the web from one roll, and applies the other web to the web fed from the one roll. Press the adhesive attached to the end of the web of the roll and glue it,
Then, in a flying type paper splicing control device that cuts by pressing the cutter against the web behind the adhesive portion fed from the one roll, the operation of the cutter is actually completed from an operation command for operating the cutter. Means for measuring the operation delay, which is the time until
It is characterized in that it has means for setting a reference value in advance, and means for comparing the measured operation delay with a preset reference value.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. 1 to 3 show one embodiment of the present invention. The embodiment shown in the figure is an embodiment applied to a flying type automatic splicing apparatus. FIG.
As shown in FIG. 1, the center of a turret arm 2 is attached to the main body 1 so as to be freely rotatable, and rolls 3 and 4 around which webs are respectively wound are attached to both ends of the turret arm 2.

In the state shown in FIG. 1, the roll (old roll) 3 that is currently unwinding approaches the end, the turret arm 2 is turned, and the next new roll (new roll) 4 is moved to the paper splicing position. It is in a state where it is. The remaining paper amount of the old roll 3 is monitored by the remaining paper total 5, and if the paper is continuously fed at the current web running speed, it is calculated how many minutes will be required for the remaining paper, and the remaining time is set to a certain level. When the time comes, the turret arm 2 turns and the new roll 4 moves to the paper splicing position.

The remaining paper amount of the old roll 3 measured by the remaining paper total 5 is output to the sequencer 22. In the turret arm 2, a pre-drive device for rotating the rolls 3 and 4 is incorporated. By this pre-drive device, the surface speed of the new roll 4 moved to the paper splicing position is equal to the running speed of the web. Until it has been accelerated in advance. In the main body 1 of the present embodiment, a paper splicing device 6 is provided movably in an oblique direction in the drawing so as to be able to approach and separate from the new roll 4 moved to the paper splicing position.

The paper splicing device 6 is provided with a fixing roll 7 and an adhesive roll 8 which can be protruded by an air cylinder 16, and a cutter 9 which can be protruded by an air cylinder (not shown). . Also,
In the vicinity of the bonding roll 8, a tape position sensor 11 for detecting the double-sided tape 10 at the leading end of the web of the new roll is provided. Each time the tape position sensor 11 detects the double-sided tape 10, it outputs a tape position signal to the auto paster controller 19 at regular intervals as shown in FIG.

On the other hand, the web fed from the old web 3 passes through a gap between the new roll 4 and the splicing device 6 and passes through a plurality of rolls 12, 13, 14, 15 and a major roll 17, and then, a rotary printing press (not shown). , And then cut at regular intervals by a cutting device 18, and the cut web is folded by a folder (not shown). The major roll 17 is provided with a major roll encoder 21.
A pulse corresponding to the running speed of the web is output to the auto paster controller 19.

The cutting device 18 includes a cutting signal sensor 20.
The sensor 20 outputs a cutting signal to the auto paster controller 19 at regular intervals for cutting the web, as shown in FIG. 2 (c). In addition, the cutting signal sensor 20 is configured such that the web portion at the position of the tape position sensor 11 of the paper splicing device 6 at the time of the generation of the signal is the cutting device 1.
As described above, the cutting signal sensor 20 is mechanically moved or the number of pulses of the major roll encoder 21 is adjusted to adjust the cutting signal generation phase with respect to the rotation reference of the entire apparatus.

In the splicing control device of this embodiment, the adhesive roll 8 and the cutter 9 are controlled based on a tape position signal from the tape position sensor 11, a cutting signal from the cutting device 18, a splicing signal from the sequencer 22, and the like. An auto paster controller 19 for controlling the operation is provided. That is, the auto paster controller 19 includes a CPU 19a, an adhesive roll counter 19b, and a cutter counter 19c, and operates as follows.

FIG. 2 shows the temporal relationship of each signal during driving by the length of the running web, and the following description will be made based on the relationship. When the amount of remaining paper of the old roll 3 detected by the remaining paper total 5 becomes equal to or less than a predetermined value, the
The paper splicing signal shown in FIG.

Therefore, first, after the paper splicing signal is input,
The distance A between the first tape position signal and the cutting signal (0) immediately before the tape position signal is obtained, and the distance B between the cutting signal (1) immediately after that is calculated from the interval between the cutting signals. The interval between the cutting signals (0) and (1) is a constant interval at which the web is cut by the cutting device 18 and is given in advance.

Next, the position of the tape position signal next to the tape position signal is obtained. The interval between the tape position signals is given in advance as the diameter of the new roll 4 × π (pi). The diameter of the new roll 4 can be given by a measuring device separately on-line or by inputting a value previously measured by a person. Subsequently, a distance C between the tape position signal and the cutting signal (4) immediately thereafter is obtained. In the example shown in FIG. 2, there are three cutting signals between the tape position signal and the cutting signal (4). The position of the cutting signal (4) is calculated as the cutting signal interval × 3 + the distance B.

Then, it is determined whether or not the distance C is not less than 300 mm and not more than 500 mm. 300 mm <C <500 mm (1) However, the condition (1) is a case where the interval between the cutting signals (= the length at which the web is cut at a constant interval) is 546 mm, and the width of the double-sided tape is about 20 mm. That is, when the above condition (1) is satisfied, the tape position signal does not overlap with the cutting signal (3), and the tape position signal is located in the first half of the center between the cutting signal (3) and the cutting signal (4). Will be located. It is 300> 546/2 and 50
This is because 0> 546 (= cutting length).

Therefore, if the web is spliced at the timing when such a condition (1) is satisfied, the connected portion of the web is not cut, and the connected portion of the web is connected to the first half of the cut web. Will be located. Therefore,
FIG. 2D shows the timing when such a condition is satisfied.
As shown in FIG. 2, an adhesive roll signal for extruding the adhesive roll 8 is output to the air cylinder 16 and FIG.
As shown in (e), a cutter signal for pushing the cutter 9 is output to the air cylinder.

Therefore, when the adhesive roll signal is output,
By the extension of the air cylinder 16, the adhesive roll 8 is extruded and the two webs are sandwiched between the new roll 4 and the webs are bonded by the double-sided tape. When the cutter signal is output, the cutter 9 is pushed out by the extension of the air cylinder (not shown), and the web fed from the old roll 3 behind the bonded portion of the web is cut. . However, the adhesive roll signal is output at a timing that allows for an operation delay D and an additional amount E with respect to the tape position signal, and the cutter signal is an operation delay F and an additional amount G with respect to the cutting signal (4).
It is output early at the expected timing.

Here, the operation delays D and F are the time from when the respective signals are output from the auto paster controller 19 to when the bonding roll 8 and the cutter 9 actually come into contact with the web. Here, this is a unique value, and here, the running speed of the web being unwound from the old roll 3 obtained from the output of the major roll encoder 21 is multiplied by the time to convert it into the travel distance of the web. On the other hand, the additional amount E is a continuation distance of pressing the adhesive roll 8, and the additional amount G is an amount that can be set artificially to adjust the til length.

For example, if the additional amount E is set to a value equal to or greater than 0, the adhesive roll 8 is pressed against the web slightly earlier with respect to the tape position signal. After being sandwiched between the double-sided tapes, the double-sided tape passes between them, and the paper splicing is ensured.
If the additional amount G is not less than 0 and not more than half of the cutting length, the cutter 9 can be pressed against the web slightly earlier than the cutting signal (4). The remaining till end is always before the cut position, and the till end is not cut. However, as the additional amount E increases, the operation timing of the cutter 9 becomes earlier. Therefore, it is necessary to set the additional amount E so as not to precede the operation timing of the bonding roll 8.

If the above condition (1) is not satisfied, the distance C is similarly obtained for the subsequent tape position signals, and the determination is repeated until the distance C satisfies the above condition. As described above, the operation delays D and F are values peculiar to the cylinder, but are not always constant and have sporadic fluctuations, and the cause thereof is not particularly clear.
It is considered that the aging is due to the influence of abrasion, deterioration, or the like, or the individual variation of the individual.

If such a fluctuation of the operation delay greatly deviates from the set operation delays D and F, the timing of splicing of the web by the adhesive roll 8 deviates, and further, the cutter 9
The timing of cutting the web by
The condition (1) is not substantially satisfied, and there is a possibility that separation of the till end or the like may cause a paper jam or the like. Therefore,
In the present embodiment, a cutter speed measuring circuit 30 is provided for measuring an operation delay, which is a time from an operation command for operating the cutter 9 to an actual completion of the operation of the cutter 9.

That is, the cutter speed measuring circuit 30 has the configuration shown in FIG.
A cutter operation command signal shown in (e) is input from the auto paster controller 19, and a cutter operation end signal END is input from a sensor (not shown) for detecting the operation end of the cutter 9. As a sensor for detecting the end of the operation of the cutter 9, a touch sensor for detecting that a piston in an air cylinder for operating the cutter 9 has moved to one end of the cylinder is used.
An optical sensor or the like for optically recognizing the above operation is used.

As shown in FIG. 3, the cutter speed measuring circuit 30 detects the edges of the two input signals to determine the rise and fall of the two signals, and determines the number of clocks (10 kHz) between them. Is counted, and the time data of the cutter operation, that is, the actually measured value of the operation delay of the cutter 9 is measured, and this is output to the sequencer 22. The sequencer 22 compares the time difference between the two signals input from the cutter speed measurement circuit 30 with a preset reference value, determines whether the difference falls within an allowable value, and sets the difference so as to exceed the reference value. If so, a warning is displayed on the display 40.

FIG. 4 shows a sheet splicing control method according to the first embodiment of the present invention. In this embodiment, the sequencer 22
First, an operation delay is measured a plurality of times to obtain an average value, and this is used as a reference value. First, immediately after outputting the cutter operation command, measurement by the counter is started (steps S1 and S2), and immediately after outputting the cutter operation end signal END, measurement by the counter is stopped (steps S3 and S2).
4) Further, the operation of storing the count value T (i) of the counter (step S5) is repeated a plurality of times (here, n
Repeat)

Next, an average value T is calculated by averaging a plurality of count values T (i) obtained by the above process (step S).
6) The obtained average value T is stored as a reference value (step S7). Subsequently, the paper splicing (paste) operation is actually started (step S8), and the measurement by the counter is started immediately after outputting the cutter operation command (step S8).
9, S10), immediately after the cutter operation end signal END is output, the measurement by the counter is stopped (step S11, S11).
S12) Further, the count value t of the counter is stored (step S13).

Then, the previously determined reference value T, allowable value A, and count value t are read from the memory (step S14), and the absolute value of the difference between the reference value and the count value is set to the allowable value A as shown in the following equation. (Step S)
15). The allowable value A is separately determined in advance. | T−t | <A

If the above inequality expression is satisfied, the reference value T and the count value t are not so different, that is, it can be determined that the fluctuation of the operation delay is small, so that the paper splicing operation is continuously executed. However, if the above inequality is not satisfied,
Since the reference value T is greatly different from the count value t, and it can be determined that the fluctuation of the operation delay is large, an alarm is output to the display 40 (step S15).

FIG. 5 shows a sheet splicing control method according to the second embodiment of the present invention. The present embodiment is a method of calculating an average value (hereinafter, referred to as a moving average value) in which the operation delay obtained later is sequentially added to the average value of the operation delay obtained first. That is, after executing steps S1 to S16,
When the above inequality is satisfied, the count value T (0) is set to 0.
(Step T1), T (1) → T (0), T (2) → T (1) ...
T (i) → T (i−1),... T (n) → T (n−1) and count down the order of the count values and store them (steps T2, T3, T4, T4).
T5) Further, T (n) is read out (step T7) and replaced with the count value t in the actual splicing operation (step T8), and a moving average of these count values T (0) to T (n) is obtained. A value T is obtained (step S6).

Thereafter, steps S7 to S15 are sequentially repeated. If the operation delay in the splicing control does not satisfy the above inequality, an alarm is output (step S16), and if the above inequality is satisfied,
Further, steps T1 to T8 are repeated any number of times, and the moving average value T is further corrected and obtained. The moving average value T obtained in this manner is more flexible than the case where a uniform average value is used, because the operation delay obtained later is sequentially added to the average value obtained first. There is an advantage that can be performed, for example, when the operation delay is being fixed to a certain tendency.

In the example shown in FIG. 5, if the moving average T fluctuates beyond a certain range, no alarm may be issued even if the operation delay t falls outside the certain range. .
Therefore, in the third embodiment of the present invention shown in FIG. 6, when the operation delay is extremely large or small, an alarm is generated without comparing with the moving average value T.

That is, after executing the above steps S1 to S13, the upper limit value _Tmax and the count value t are read out (step S14, step U1), and the upper limit value _Tmax and the count value t are compared (step U2). When the count value t exceeds the upper limit value _Tmax , an alarm is generated. On the other hand, when the count value t does not exceed the upper limit value _Tmax , the lower limit value T is set.
It reads _min (step U3), compared with the lower limit value T _min and the count value t (step U4), when the count value t is smaller than the lower limit T _min generates an alarm.

When the count value t is not larger than the upper limit value _Tmax and not smaller than the lower limit value _Tmin , the reference value T,
The allowable value A is read (step S14), and it is determined whether or not the absolute value of the difference between the reference value T and the count value t is smaller than the allowable value A (step S15). If the absolute value of the difference between the reference value T and the count value t is equal to or less than the allowable value, as shown in FIG.
According to steps T1 to T8, a moving average value T is obtained.

In the splicing control device according to the present embodiment described above, the operation delay of the cutter 9 is actually measured by the cutter speed measuring device 30, and the sequencer 22 detects the operation delay t and the reference value T.
And if the absolute value of the difference exceeds the allowable value A, it is possible to output an alarm that a paper jam or the like will occur. Therefore, by correcting the operation delay D in response to the alarm, it is possible to reliably ensure the timing with the cutting device and the folding machine. Further, the operation delay t
It is preferable to automatically correct the operation delay D according to the following.

In the above-described paper splicing control method according to the present embodiment, since the average value of several operation delays measured first is used as the reference value, it is not necessary to predict (estimate) the operation delay in advance. Further, by using the moving average value, which takes into account the operation delay obtained afterward with respect to the average value obtained first, as a reference value, flexible control according to the fluctuation of the operation delay becomes possible. Further, even when the moving average value moves beyond a certain range, an undesired result can be prevented by setting an upper limit value and a lower limit value for the operation delay.

In the above-described embodiment, the operation delay of the cutter 9 in the splicing apparatus was actually measured. However, the operation delay is not limited to this. The operation delay may be measured and compared with a reference value.

[0047]

As described above in detail with reference to the embodiments, the present invention measures the operation delay in the splicing apparatus and compares the measured operation delay with a reference value to thereby determine the operation delay. Can be alerted if the value fluctuates beyond a certain range. For this reason, it is possible to carry out the paper splicing operation while avoiding a paper jam or the like by reliably setting a timing with the cutting machine or the folding machine.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a paper splicing control device according to an embodiment of the present invention.

FIG. 2A shows a paper splicing signal, FIG. 2B shows a tape position signal, FIG. 2C shows a cutting signal, FIG. 2D shows an adhesive roll output, and FIG. e) is a time chart showing the cutter output.

FIG. 3 is a block diagram of a cutter speed measurement circuit.

FIG. 4 is a flowchart illustrating a first embodiment of a paper splicing control method according to the present invention.

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

FIG. 6 is a flowchart showing a third embodiment of the paper splicing control method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Turret arm 3 Old roll 4 New roll 5 Remaining paper total 6 Paper splicer 7 Fixed roll 8 Adhesive roll 9 Cutter 10 Double-sided tape 11 Tape position sensor 12, 13, 14, 15 Roll 16 Air cylinder 17 Measure roll 18 Cutting Apparatus 19 Auto paster controller 19a CPU 19b Adhesive roll counter 19c Cutter counter 20 Cutting signal sensor 21 Measure roll encoder 22 Sequencer 30 Cutter speed measurement circuit 40 Display

Claims (2)

[Claims] 1. While feeding a web from one roll, the other roll is accelerated in advance by a pre-drive device, and an adhesive attached to a web tip of the other roll is pressed against the web fed from the one roll. In a flying-type paper splicing control method in which a cutter is pressed against a web behind an adhesive portion to be unwound from the one roll and then cut, the cutter is actually attached to the cutter from an operation command for operating the cutter. A sheet splicing control method comprising measuring an operation delay, which is a time until the operation is completed, and comparing a preset reference value with an actually measured operation delay. 2. While feeding the web from one roll, the other roll is accelerated in advance by a pre-drive device, and the adhesive material attached to the web tip of the other roll is pressed against the web fed from the one roll. In a flying-type paper splicing control device in which the cutter is pressed against the web behind the bonded portion fed out from the one roll and then cut by bonding, the actual operation of the cutter is performed based on an operation command for operating the cutter. A means for measuring an operation delay that is a time until the operation is completed; a means for setting a reference value in advance; and a means for comparing the measured operation delay with a preset reference value. Splice control device.