JPH0773895B2 - How to manage stock change for corrugator machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to an improvement of a paper stock change management method in a corrugated board manufacturing apparatus using a corrugator machine.

<Prior Art> An outline of a corrugated board manufacturing apparatus will be described with reference to FIG.

1A is a mill roll stand for the A-flute core, 2A is a mill roll stand for the A-flute back liner, 3A is a heater that raises the paper temperature, and 4A is a corrugated core stock from 1A A single flute for producing A flute single-sided corrugated board 5A by adhering glue to the top of this step and adhering back liner stock from the mill roll stand for back liner 2A, 6A is an A flute from this single facer 4A It is a conveyor that transfers the single-sided corrugated board 5A to the pooling mechanism 7A.

1B to 7B are B flute manufacturing lines corresponding to the elements 1A to 7A.

A flute single-sided corrugated board 5A and B that passed through the reservoir mechanism
The flute single-sided corrugated board 5B is heated by the triple heater 9 via the bridge roll 8.

Reference numeral 10 is a mill roll stand for the front liner, which is guided to the triple heater 9 similarly to the A, B flute single-sided corrugated board.

The A, B flute single-sided corrugated board and the front liner that have passed through the triple heater are guided to the gluing machine 12 and the adhesive is applied to the top of the A, B flute single-sided corrugated board and the double facer is applied.
It is guided to 13 and laminated in a sandwich shape to be pressed and heated to form a double-sided corrugated board 14.

The double-sided corrugated board 14 that has passed through the double facer 13 is cut in the width direction by the rotary shear 15 and further slitter 16
Is cut in the same direction as the flow direction according to the picking and trimming of both ends, and the scorer 17 makes a crease in the flow direction.

Even in the case of the double-sided corrugated board 14 made of the same material, the cutting position of the slitter 16 or the fold position of the scorer 17 may be changed midway, and the boundary portion is cut by the rotary shear 15.

The unit between the cuts of the rotary stocker 15 having the same stock and the same cutting position and fold position will be referred to as a suriscolot, and the unit of continuous same stock will be referred to as a simple lot.

In this way, two types of corrugated board having different take-off widths and fold positions can be manufactured at the same time.

The two types of corrugated cardboard that come from the scorer
In order to enable management of product lengths of various types, the product lengths (cutting lengths) d are separated by guide means 18 into upper and lower tiers and guided to a cut-off mechanism 19 by a rotary cutter. It is cut into units and each is delivered
20, Lower delivery 21 is stocked and shipped.

Reference numeral 22 denotes a cutoff sensor, which sends a cutoff pulse e _p to the controller 23 for each cutoff in product length units.

Each of the mill roll stands 1A, 2A, 1B, 2B, 10 described above supports a pair of stock rolls, and the controller 23
If the more of the stock change command e _c type of stock is changed, changes the stock connected before waiting at the end of the stock lot, the leading end of the different roll stock By doing so, it is managed so that the breakage of the paper material does not occur, and
Lot break signals e _1a , e _1b , e _2b , e ₁₀ from each of the mill roll stands 1A, 2A, 1B, 2B, 10 are transmitted to the controller 23 for stock change management.

These signals are collectively indicated as e _l . Controller 23
Manages the timing of changing the paper material by the cut signal e _l , the cutoff pulse e _p, and the cut length d.

Next, the lot mode will be described with reference to FIG. Attention is paid to the _nth lot L _n of corrugated board flowing in the direction of arrow A. L _n-1 is a front lot with a different stock, and L _{n + 1} is a rear lot with a different stock.

In lot L _n , SL ₁ , SL ₂ and SL ₃ are squirco lots, and the number of divisions when dividing into a plurality of lines in the flow direction is different, SL ₁ is 4 pieces, SL ₂ is 3 pieces, and SL is 3 pieces. ₃ is 2 picks.

Furthermore, pay attention to Sriscolot SL ₂ . Two types of length cutting intervals in the direction orthogonal to the flow can be selected.
The directions are divided by 18, for example, both side parts of the three-piece cutting are guided by the upper rotary cutter of the cut-off mechanism 19 and cut by the same cutting length d, and the central part is guided by the lower rotary cutter. Cut with different cutting lengths. And
For example, a cut-off pulse e _p is emitted for each cut with the cut length d.

In addition, the total length of each line divided into three lines in the flow direction in Sliscolot SL ₂ is planned in advance to be substantially the same.

<Problems to be Solved by the Invention> In such a configuration, the production length (the number of produced sheets) with the same stock is managed by a method of counting the number of products, that is, the number of cutoff pulses e _p .

The equipment length from the cut-off mechanism 19 to the mill roll stand and the stock length from the cut-off mechanism to the mill roll stand (hereinafter referred to as the set stock length), which is obtained by adding the amount to the accumulation mechanism, are constantly measured. Controller 23, the stock change command e _c is issued when the sum of the production length based on the cutoff pulse e _p and the cutting length d and the set stock length reaches the lot length to be controlled. The stock change at the mill roll stand is executed.

However, this kind of stock charge change management is not problematic when the lot to be managed is longer than the set stock price length, but the stock price change management cannot be performed when the lot to be managed is shorter than the set stock price length. There is a point.

The present invention maintains excellent production control by measuring the production length with high measurement accuracy when the lot length is longer than the set stock length, and even when the lot length is shorter than the set stock length. An object of the present invention is to provide a management method capable of accurately generating a change signal.

<Means for Solving Problems> When the length of a lot of corrugated board to be produced is shorter than the set stock length from the mill roll stand for feeding the stock to the cut-off mechanism for cutting the corrugated board into product lengths, Based on the traveling amount detection signal from the traveling amount detector attached to the mill roll stand side, when the set stock length is the same or longer, the cutoff signal from the cutoff sensor attached to the cutoff mechanism side The stock change management method of the corrugator machine is adopted in which the stock change change is controlled by the mill roll stand according to the stock change command signal generated based on the above.

<Operation> According to the present invention, during the period when the lot break is between the stock material supply side and the cut-off mechanism, the travel quantity detection signal of the travel quantity detector (measuring roll) for measuring the stock quantity is used. The stock change management is executed, and after the lot break passes through the cutoff mechanism, the stock change management is switched to the cutoff pulse.

<Example> An example of the present invention will be described with reference to FIG. Description of the same elements as those described in the related art will be omitted, and description of the features of the present invention will be added.

24 is a measuring roll provided in the middle of the conveyor 6A of the A-flute single-faced corrugated board 5A for detecting the running amount of the stock, which rotates in proportion to the traveling speed of the A-flute single-faced cardboard 5A and is proportional to the speed. transmitting a pulse signal e _m which is the controller 23.

The paper charge change management of the controller 23 is executed by the following procedure.

(1) First, a paper charge change order e _c due to the end of the previous lot
Due to the lot break signal e _l from each mill roll stand
To start the stock change management by the pulse signal e _m of from the measuring roll 24 from the time but that has entered the new lot is generated.

(2) For short lot before needs to be changed to the next stock the integrated value of the pulse signal e _m reaches the set stock length, that is, when the lot change is performed at a cut-off mechanism, the cutoff mechanism Side compares the new lot to be produced on the side with the lot currently produced on the mill roll stand side, and if they are not the same, one or more lots are inserted between the cutoff mechanism 19 and the mill roll stand. It was judged that the lot of the mill roll stand did not reach the cutoff mechanism, and the pulse signal from the measuring roll 24
to proceed with the stock change management by e _m.

Therefore, the cut-off pulse e _p
Cut off the lot without using the cut-off mechanism 19
A controller 23 sends a stock change command e _c while the equipment is within the equipment length up to the mill roll stand.

(3) Next, when a lot change is executed by the cut-off mechanism, a new lot to be produced on the cut-off mechanism side is compared with a lot currently produced on the mill roll stand side. the, it is determined that the lot length is longer than the set stock length, when the break of lots is reached to the cut-off mechanism 19, i.e., the time after the integrated value of the pulse signal e _m has reached the set stock length cutoff to migrate to the stock change management by the pulse e _p.

The reason for the shift is that the measurement accuracy of the production length measurement by the cutoff pulse is higher than the measurement accuracy of the pulse signal by the travel amount detector.

That is, the measuring roll may slip with the paper stock or change its diameter due to abrasion of the roll, so that the accurate running amount of the paper stock may not be obtained.

FIG. 3 is a functional block diagram of the controller 23. The amount calculating means for calculating the reservoir volume l _S in mechanism reservoir by a pulse signal e _m from the measuring roller 24 26, 27
Is a set stock length calculation means that obtains the set stock length l _p by adding the accumulated amount to the equipment length from the mill roll stand to the cut-off mechanism and outputs the signal.

28 is a lot-remaining calculation means, which sets a lot-remaining length M of a new lot preset by the paper-stock change signal e _c , and when the lot is shorter than the set paper-stock length l _{p, the} selection command signal S
The pulse signal em of the measuring roll from the pulse selector means 29, which is output based on the _above, is input and subtracted from the lot setting value to calculate the lot length M.

Further, when the newly set lot length M is longer than the set stock length l _p , the pulse selector 29 outputs the cutoff pulse based on the selection command signal S after the new lot has passed through the cutoff mechanism. The e _p is output to the lot remaining calculation means 28 and the same operation is executed.

Reference numeral 30 is a comparing means, which monitors the lot length M and sends a comparison output signal C to the stock change signal generating means 31 when the lot length M becomes zero.

Based on the input of the signal C, the paper charge change signal generating means 31 outputs the paper charge change command signal e _c to the lot leaving calculation means 28 and the outside.

FIG. 4 is a flowchart showing the signal processing procedure described above when the lot length is longer than the set stock length.

<Effects of the Invention> As described above, according to the present invention, when the length of the corrugated board lot is shorter than the set stock length from the mill roll stand to the cut-off mechanism, based on the running charge detector,
When the stock length is equal to or longer than the set stock length, the stock change command on the mill roll stand controls the stock change based on the cut-off signal. Even if it is a lot, it is possible to manage the stock change, and it is possible to improve the productivity of corrugated board production by the corrugator machine, which tends to produce various kinds in small quantities. When the length is the same or longer, the production length can be measured by the cutoff signal with higher measurement accuracy.
Better production control can be implemented.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of a lot length mode, FIG. 3 is a functional explanatory diagram of lot management,
FIG. 4 is a flowchart showing the signal processing procedure. 1A, 1B …… Mill roll stand for core, 2A, 2B …… Mill roll stand for liner, 3A, 3B …… Heater, 4A, 4B ……
Single facer, 5A, 5B …… Single-sided cardboard, 6A, 6B ……
Conveyor, 7A, 7B ... Reservoir mechanism, 8 ... Bridge roll, 9 ... Triple heater, 10 ... Mill roll stand for front liner, 12 ... Glue machine, 13 ... Table facer, 14 ... Double-sided corrugated board , 15 ...... Rotary shear, 16 ...... Slitting machine, 17 ...... Scorerer, 18 ...... Guide means, 19 ...... Cut-off mechanism, 20 ...... Upper stage delivery, 21
…… Lower delivery, 22 …… Cutoff sensor, 23 ……
Controller, 24 ... Measuring roll, 26 ... Reservoir amount calculation means, 27 ... Set stock length calculation means, 28 ... Lot calculation means, 29 ... Pulse selector means, 30 ... Comparison means, 31 ... ... Price change signal generation means

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Hidetoshi Hoshiyama 4-1-1186 Daikai, Fukushima-ku, Osaka City, Osaka Prefecture Rengo Co., Ltd. (72) Ikuo Yoshimoto 4-1-1186, Daikai, Fukushima-ku, Osaka-shi, Osaka No. Rengo Co., Ltd. (72) Inventor Yosaku Suwabe 4-1-1, Okai, Fukushima-ku, Osaka-shi, Osaka Rengo Co., Ltd. (72) Inventor Katsumi Sasaki 2-9-32, Nakamachi, Musashino City, Tokyo Yokogawa Electric Machinery Co., Ltd. (72) Inventor Toshiyuki Shimomura 2-932 Nakamachi, Musashino City, Tokyo Yokogawa Electric Co., Ltd. (72) Osamu Yamashita 2-39 Nakamachi, Musashino City, Tokyo Yokogawa Electric Co., Ltd. In-house (56) References JP-A-54-150297 (JP, A)

Claims (1)

[Claims] 1. In a corrugated board manufacturing apparatus, when the length of a lot of corrugated board to be produced is shorter than a set stock length from a mill roll stand for feeding the stock to a cut-off mechanism for cutting the corrugated board into product lengths, the mill is used. Based on the travel amount detection signal from the travel amount detector attached to the roll stand side, based on the cutoff signal from the cutoff sensor attached to the cutoff mechanism side when the set stock length is the same or longer. A stock change management method for a corrugator machine, characterized in that the stock change change management signal is generated by a mill roll stand.