JPH05254108A - Method for control of corrugated fiberboard sheet processor and its apparatus - Google Patents

Abstract

PURPOSE:To achieve excellent processing of a corrugated fiberboard sheet by a method wherein a new set correcting value is added to each unit differential operation positioning mechanism when detection of a sheet is completed for an initial printer unit and every time a distance between a unit on an upper stream side and a cylinder reaches a number of pulses for the unit thereafter. CONSTITUTION:A slide intervenes between surfaces of a sheet drawing out roll 24 and a sheet 10. Then, for a first printer unit 14, a sensor PHA obtains a first timing tB at a point of time T2 when the sheet 10 has finished to pass. Therefore, a new set correcting value RB' is added to a differential operation positioning mechanism DB of the unit 14 at the timing tB at the point of time when the sensor PHA has finished to detect the sheet. Then, for a second printer unit 16, a second timing tC is obtained at a point of time when the sheet 10 has advanced by a distance LC from a printing contact point of the unit 14. Therefore, if a new correcting value RC' is added to a mechanism DC of a unit 16 at the timing tC, a correction taking account of a shift XP has been imparted to a printing cylinder 26 at the timing tC.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding control method and apparatus for a corrugated board sheet processing apparatus, and more specifically, a plurality of units such as a printer slotter and a printer scorer are arranged in series in a complex manner. In the corrugated board sheet processing device, when the corrugated board sheet is fed from the sheet feeding device toward the printer unit, a slip or the like between the sheet and the sheet feeding roll causes a shift to a preset synchronous position such as printing or slotting. The present invention relates to a sheet supply control method and apparatus which realizes favorable processing of a corrugated cardboard sheet by sequentially correcting each corresponding unit by the amount of deviation when it occurs.

[0002]

2. Description of the Related Art A printer slotter (combined device of a multicolor rotary printing machine and a grooving machine) and a printer scorer (a multicolor rotary printing machine and a ruled line machine) arranged downstream of a corrugator line for continuously producing corrugated board sheets. In the corrugated cardboard sheet processing apparatus that includes a plurality of rotary cylinders of equal diameter in series, each rotary cylinder has its own mechanical reference point with respect to the machining contact point (bottom dead center or top dead center). have. And according to the progress of a series of machining processes over time,
Accurate synchronization of each reference point is ensured so that each reference point sequentially arrives at the corresponding machining contact point in time. However, each unit which is a constituent unit of the compound machine is configured to be separable from each other for work preparation and inspection, and each cylinder is independently rotated for mounting a printing plate or adjusting the position of a groove cutting blade. Be done. Therefore, when the above-mentioned setting work is completed and the respective units are rejoined, the relative positional relationship of the reference points of the respective cylinders is random. Therefore, the apparatus cannot be operated in this state, and it is necessary to tune the series of reference points prior to the operation.

First, this relationship will be described by exemplifying a printer slotter which is a typical corrugated board sheet processing apparatus shown in FIG. Corrugated board sheet processing equipment, corrugated board sheet 1
A sheet feeding device 12 for feeding and feeding 0 sheets one by one, and a first printer unit 1 for performing a first printing on the sheet 10.
4, the second printer unit 16 for performing the second printing on the sheet 10, and the sheet 10 on which the required multicolor printing is performed.
Creaser unit 1 to apply crease to the
8 and a slotter unit 20 for slotting the lined sheet 10 are arranged in series. That is, the sheet feeding device 12 stacks a large number of corrugated cardboard sheets 10 on the bed 22, and kicks the sheets 10 one by one toward the first printer unit 14 at a required timing by, for example, a kicker (not shown). It is like this. Cardboard sheet 1 kicked out
0 is the sheet feeding device 12 and the first printer unit 14
It is pinched by the sheet feeding rolls 24, 24 provided between and, and is horizontally supplied to the downstream side. The first printer unit 14 includes a printing cylinder 26 and a press cylinder 28 that are arranged in a vertical relationship, receives ink supply from an inking roll 29, and passes between the cylinders 26 and 28. The first printing is applied to. The second printer unit 16 also has the same structure,
Second printing is performed on the sheet 10 that has been first printed. This printer unit is sufficient for single-color printing, but in many cases two or more units are connected to enable multicolor printing.

Further, the creaser unit 18 is provided with ruled line heads 30, 30 in a vertical relationship to subject the printed corrugated cardboard sheet 10 to the required cleaving, and the slotter unit 20 in the next step is arranged in a vertical relationship. The slotting heads 32, 32 are adapted to perform required slotting on the sheet 10. The respective units are freely movable on a common rail 34 via wheels 36, whereby the units can be coupled / separated. The above-mentioned printing cylinder 26, press cylinder 28, ruled line head 3
The 0 and the grooving head 32 may not be strictly called cylinders, but may be referred to as “rotary cylinders” for convenience in this specification. Then, at the time when the setting work is completed and the units are rejoined as described above,
Since the relative positions of the reference points of these rotary cylinders are displaced, it is necessary to synchronize a series of reference points prior to operation.

For this synchronization (hereinafter referred to as "initial positioning"), motor driven differential positioning mechanisms DB, DC, D are attached to the rotary shafts of the rotary cylinders 26, 26, 30, 32, respectively.
D and DE are arranged correspondingly. As this differential positioning mechanism, for example, a wave generator mechanism manufactured by Harmonic Drive Co., Ltd. is preferably used. After the setting work is completed and the respective units are recombined, the motors of the corresponding mechanisms are driven to make a series of series. Initial positioning is performed with respect to the reference point of the rotating cylinder. That is,
A built-in motor (not shown) is driven to drive the differential positioning mechanism D.
B, DC, DD, DE are operated and the corresponding rotary cylinders 26, 26, 30, 32 are slightly rotated in the forward and reverse directions to perform initial positioning. Incidentally, the corresponding register values when the initial position is set by the respective differential positioning mechanisms DB, DC, DD, DE are RB, RC, R here for convenience.
These shall be referred to as D and RE.

[0006]

The cardboard sheet used in the sheet processing apparatus such as the printer slotter described above is
It is stipulated that the vertical and horizontal dimensions and the thickness have a fixed standard. However, due to various factors such as the material and warp of the corrugated board sheet, the distance between the sheet feeding rolls provided in the sheet feeding device, the sheet feeding speed and the amount of sheet stacking, the sheet slips (slips) with the feeding roll. Sometimes. When the corrugated cardboard sheet from the sheet feeding device slips in the course of feeding, the differential positioning mechanism causes an initial stage of printing, creasing, slotting, etc. in a series of printer units, creaser units, slotter units, etc. Even if the positioning is performed in advance, deviations inevitably occur in various types of machining by each rotating cylinder. For example, high accuracy can be obtained by processing a corrugated cardboard sheet at a low speed during a test run, but as the speed increases in practical operation, the print finish and cuts may shift, often affecting the product value. It can be seen.

As means for coping with the occurrence of such a deviation, for example, the deviation amount of the corrugated cardboard sheet kicked out from the sheet feeding device is electrically measured, and the interval between the sheet feeding rolls is changed by an amount corresponding to the deviation amount. Devices that automatically adjust have been proposed. However, with this device, it takes a considerable amount of time to automatically adjust the roll interval after the occurrence of misalignment is detected, and defective processing of corrugated board sheets continues until the misalignment is resolved. .. Further, if the interval between the sheet feeding rolls is adjusted to eliminate the deviation, the roll interval sometimes becomes too narrow, and the step portion of the corrugated cardboard sheet is crushed, and the strength of the processed sheet decreases. is there. If there is no such automatic roll gap adjusting device, the operator observes and measures the finished state of the corrugated cardboard sheet after a series of processing with the naked eye or a scale, and adjusts the sheet feeding roll gap based on experience. I am working on it. Even at this time, there is a drawback that many defectively processed corrugated cardboard sheets are produced before being reset to an appropriate interval. Also,
It is also practiced to visually check the amount of misalignment that has occurred on the corrugated cardboard sheet after processing, and to finely adjust the position of the rotary cylinder in the printer unit, slotter unit, etc. by the differential positioning mechanism. It is pointed out that a similar adjustment needs to be made correspondingly with respect to the unit, which requires a lot of time and complicated work.

[0008]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned drawbacks inherent in a corrugated board sheet processing apparatus, and it is a proposal to solve the above-mentioned drawbacks. In a corrugated board sheet processing device arranged in series with each other, when the corrugated board sheet is fed from the sheet feeding device to various rotary units, it is preset by factors such as slippage between the sheet and the sheet feeding roll. When misalignment occurs in the initial synchronization position such as printing or slotting, the sheet supply that can realize good processing of corrugated cardboard by sequentially correcting each unit corresponding to this misalignment amount. An object is to provide a control method and an apparatus thereof.

[0009]

[Means for Solving the Problems] Overcoming the above-mentioned problems,
In order to achieve the intended purpose, a method for controlling the supply of corrugated board sheets according to the present invention is a sheet in which a large number of corrugated board sheets are stacked, and the sheets fed one by one are sandwiched by sheet feeding rolls and fed to the downstream side. Supply device,
One or more printer units, which are arranged immediately downstream of the sheet supply device and print on the corrugated cardboard sheet by a printing cylinder and a press cylinder which are arranged in a vertical relationship, and immediately downstream of the printer unit. It is composed of a rotary unit that is arranged in a vertical relationship and performs various processes such as slotting on the printed corrugated cardboard sheet, and each cylinder is initially positioned by a corresponding differential positioning mechanism. In the corrugated cardboard sheet processing apparatus, the rotation detector connected to the sheet feeding roll only while the sheet detection sensor provided in the sheet supply path from the sheet supply device to the printer unit detects passage of the corrugated cardboard sheet. The rotation speed of the roll is detected by Direction is calculated, and the actual set length of the sheet is subtracted from the length in the sheet feeding direction to calculate the deviation amount for each supply in each corrugated board sheet, and the initial value in the differential positioning mechanism is calculated. A new set value as a correction target value is obtained by adding the shift amount to each of the register values after setting, and the sheet detection by the sheet detection sensor is completed in the differential positioning mechanism in the first printer unit. The newly set correction value is given at a timing, and with respect to the subsequent printer unit and rotation unit, the distance from the cylinder in the adjacent upstream unit has reached a value converted into the pulse number of the rotation detector. A newly set correction value was given to the differential positioning mechanism corresponding to each unit at each timing. And it features.

A sheet supply control device according to another invention of the present application is a sheet supply device in which a large number of corrugated cardboard sheets are stacked and fed one by one, and the sheets are clamped by a sheet feeding roll and supplied downstream. , One or more printer units which are arranged immediately downstream of the sheet feeding device and print on the corrugated cardboard sheet by a printing cylinder and a press cylinder which are arranged in an up-and-down relationship, and immediately downstream of the printer unit. And a rotating unit that performs various processes such as slotting on the printed corrugated cardboard sheet by rotating cylinders that are arranged in a vertical relationship, and each of the cylinders is initialized by a corresponding differential positioning mechanism. In a corrugated cardboard sheet processing device that is positioned, from the sheet supply device to the printer unit The rotation speed of the roll is detected by the rotation detector connected to the sheet feeding roll only while the sheet detection sensor provided in the sheet feeding path detects the passage of the corrugated board sheet, and the feeding direction in the sheet is detected. Means for calculating the length of the corrugated board sheet by subtracting the actual set length of the sheet from the length in the sheet feeding direction, and the differential positioning Means for obtaining a new set value as a correction target value by adding the deviation amount to the register value after the initial setting in the mechanism, and the differential positioning mechanism in the first printer unit includes the sheet detection The newly set correction value is given at the timing when the sheet detection by the sensor is completed, and the subsequent printer unit and Regarding the unit, a new setting is made for the differential positioning mechanism corresponding to each unit at each timing when the distance from the cylinder in the adjacent upstream unit reaches the value converted into the number of pulses of the rotation detector. It is characterized by giving the corrected value.

[0011]

Next, a sheet supply control method for a corrugated board sheet processing apparatus according to the present invention will be described with reference to an apparatus according to a preferred embodiment. Since the printer slotter described with reference to FIG. 4 is used as it is in the corrugated board sheet processing apparatus in which this method is implemented, the same members as already described are designated by the same reference numerals. Figure 1
Shows a printer slotter as a preferred embodiment, in which a photoelectric type sheet detection sensor PHA is arranged in the vicinity of a sheet supply path located between the sheet supply device 12 and the first printer unit 14, and its detection head To the passage path of the corrugated board sheet 10. A rotation detector PGA such as a pulse generator is connected to the rotating shaft of one of the sheet feeding rolls 24 to generate a pulse according to the rotation speed of the sheet feeding roll 24.

Therefore, the length dimension of the corrugated board sheet 10 delivered by the sheet delivery roll 24 is determined by the roll 2
It is easily calculated by the circumferential dimension of 4 and the number of pulses from the rotation detector PGA. For example, as shown in FIG. 2, rotation of the sheet feeding roll 24 (the roll is constantly rotating)
As a result, pulses are continuously generated from the rotation detector PGA at predetermined intervals. And the sheet detection sensor PH
Time point T ₁ when A detects the passage start of the cardboard sheet 10
Then, the signal from the rotation detector PGA is taken in, and the signal from the rotation detector PGA is stopped at time T ₂ when the sensor PHA detects the passage end of the sheet 10. The number of pulses obtained during the time from T ₁ to T ₂ and the circumferential dimension of the roll 24 are input to a calculation block (not shown) and calculated here, so that the length LP in the feeding direction of the corrugated paperboard sheet 10 is calculated. Is calculated. This length LP is an actual measured value, but as described above, a "slip" element is interposed between the sheet feeding roll 24 and the surface of the sheet 10. For this reason, the measured length LP does not always match the actual set length CP of the corrugated board sheet 10, and generally tends to be slightly longer than the actual length CP. Therefore, from the measured length LP of the corrugated board sheet 10 in the feeding direction, the actual set length C of the sheet 10 is calculated.
By subtracting P, the deviation amount XP for each supply of each sheet 10 is calculated. That is, LP (measurement length) -C
P (set length) = XP (shift amount), and this shift amount XP
Is a value detected each time the corrugated paperboard sheet 10 is fed from the sheet supply device 12 and supplied.

As described above, when the deviation amount XP of each sheet is detected on the exit side of the sheet feeding device 12, a new correction value (in consideration of this deviation amount) is added to the rotary cylinder in each rotary unit on the downstream side. It suffices to give the target value) and instantly rotate each rotary cylinder by an amount corresponding to the deviation.
The above-mentioned differential positioning mechanism DB, DC, DD, DE
Can respond in a very short time by giving a drive command to the built-in motor. That is, the differential positioning mechanism D
The register values RB, RC, RD, and RE described above are correspondingly set in B, DC, DD, and DE at the time of initial positioning. Therefore, this register value RB, RC, R
A new correction value R is obtained by adding the deviation amount XP to D and RE.
B ', RC', RD ', RE' will be created and given to each corresponding differential positioning mechanism DB, DC, DD, DE. RB + XP = RB 'RC + XP = RC' RD + XP = RD 'RE + XP = RE'

The problem here is how to apply the above-mentioned correction values RB ', RC', RD ', RE' to the corresponding differential positioning mechanism DB, DC, DD, DE. is there. The reason is that the corrugated cardboard sheet 10 kicked out from the sheet feeding device 12 is pinched by the sheet feeding rolls provided in each unit and moves horizontally,
This is because the correction in consideration of the amount of deviation of the rotary cylinder in each unit needs to be completed immediately before the sheet 10 arrives. With respect to this point, in the present embodiment, the timing for moving each rotating cylinder should be obtained immediately before the corrugated board sheet 10 displaced by XP is passed through the corresponding cylinder, and therefore t shown in FIG.
The rotary cylinder is corrected at the timings of B, tC, tD, and tE. That is, since the first printer unit 14 is located immediately downstream of the sheet feeding device 12, the first timing tB is obtained at the time T ₂ when the sheet detection sensor PHA detects the end of passing the sheet 10. Therefore, the differential positioning mechanism DB of the first printer unit 14
In addition, the newly set correction value RB 'is given at the timing tB when the sheet detection by the sheet detection sensor PHA is completed.

Next, regarding the second printer unit 16, as shown in FIG. 3, since the printing cylinder 26 is separated from the printing cylinder 26 of the first printer unit 14 by the distance LC, the corrugated cardboard sheet 10 is The second timing tC is determined at the time point when the print contact point of the first printer unit 14 advances the distance LC. That is, the distance LC between the print cylinder 26 of the adjacent first upstream printer unit 14 and the print cylinder 26 of the second printer unit 16 is determined by the rotation detector PGA.
The time point at which the value converted into the number of pulses is reached is the second timing tC. Therefore, at the timing tC, the second
By giving a new correction value RC ′ to the differential positioning mechanism DC of the printer unit 16, the cardboard sheet 1
When 0 arrives, the correction considering the deviation amount XP is applied to the print cylinder 26.

As for the creaser unit 18, as shown in FIG. 3, the ruled line head 30 is separated from the printing cylinder 26 of the second printer unit 16 by a distance LD. Therefore, the third timing tD is obtained when the corrugated board sheet 10 advances the distance LD from the printing contact in the second printer unit 16. That is, the time when the distance LD between the printing cylinder 26 of the adjacent second upstream printer unit 16 and the ruled line head 30 of the creaser unit 18 reaches a value converted into the pulse number of the rotation detector PGA is Timing t of 3
It becomes D. Therefore, at this timing tD, a new correction value RD ′ is given to the differential positioning mechanism DD in the creaser unit 18, so that when the corrugated cardboard sheet 10 arrives, the correction that allows for the deviation amount XP is corrected.
It is assigned to 0.

Similarly, as shown in FIG. 3, the groove cutting head 32 of the slotter unit 20 has a distance LE between the head 32 and the ruled line head 30 of the upstream creaser unit 18.
Only separated. Therefore, when the distance LE reaches a value converted into the number of pulses of the rotation detector PGA, it becomes the fourth timing tE, and at this timing tE, a new correction value RE is added to the differential positioning mechanism DE in the slotter unit 20. ´ will be given. As a result, when the corrugated board sheet 10 reaches the groove cutting head 32, the groove cutting head 32 is corrected in consideration of the deviation amount XP of the sheet 10.

[0018]

As described above, according to the sheet feeding control method and device for the printer slotter according to the embodiment, a so-called misalignment occurs due to slippage between the corrugated board sheet fed from the sheet feeding device and the sheet feeding roll. Also, the deviation amount is calculated and added to the register value of the differential positioning mechanism to obtain a new correction value, and immediately before the sheet reaches the machining contact of each rotary unit, the corresponding differential positioning mechanism. Is instantly corrected by this new correction value.

[0019]

As described above, according to the sheet feeding control method and apparatus according to the present invention, sheet feeding is performed in a corrugated cardboard sheet processing apparatus in which several units are arranged in series in a complex manner like a printer slotter. When feeding the corrugated board sheet from the device to various rotary units,
If slippage etc. occurs on the sheet and the synchronous position such as printing or slotting is misaligned, it is possible to successively correct each unit corresponding to this misalignment amount, so it is always processed in good condition. The corrugated cardboard sheet is manufactured. Immediately after detecting the deviation amount of the corrugated cardboard sheet, a correction command is given to the differential positioning mechanism in each corresponding rotary unit to instantly correct each rotary cylinder to a synchronized state. It is extremely economical because it does not cause waste. In addition, the fine adjustment of the interval in the sheet feeding roll is not required, and the produced corrugated cardboard sheet is not crushed.

[Brief description of drawings]

FIG. 1 is a schematic side view of a printer slotter in which a sheet supply control method according to the present invention is preferably implemented.

FIG. 2 is a graph showing a pulse signal from a rotation detector used in the printer slotter according to the embodiment and a sheet detection waveform by the sheet detection sensor.

FIG. 3 is an explanatory diagram for obtaining first to fourth timings shown in the embodiment.

FIG. 4 is a schematic side view showing a general printer slotter as an example of a corrugated board sheet processing apparatus.

[Explanation of symbols]

 10 Corrugated Cardboard Sheet 12 Sheet Feeding Device 14 First Printer Unit 16 Second Printer Unit 18 Cleazer Unit 20 Slotter Unit 24 Sheet Feed Roll 26 Printing Cylinder 28 Press Cylinder 30 Ruled Line Head 32 Grooving Head DB, DC, DD, DE Differential Positioning Mechanism PGA Rotation detector PHA Sheet detection sensor LP Sheet feeding direction length CP Sheet set length XP Deviation amount RB, RC, RD, RE Register value after initial setting RB ', RC', RD ', RE' New setting value

Claims (2)

[Claims] 1. A number of corrugated cardboard sheets (10) are stacked,
A sheet supply device (12) for pressing the sheets (10) delivered one by one by a sheet delivery roll (24, 24) and supplying the sheet to the downstream side, and arranged immediately downstream of the sheet supply device (12). , One or more printer units (1) for printing on the corrugated cardboard sheet (10) by the printing cylinders (26, 26) and the press cylinders (28, 28) arranged in a vertical relationship.
4,16) and the rotary cylinders (30,30,32,3) arranged immediately downstream of the printer unit (14,16) and arranged in a vertical relationship.
2) consists of a rotating unit (18, 20) that performs various processes such as slotting on the printed corrugated cardboard sheet (10), and each of the cylinders (26, 30, 32) has a corresponding differential positioning. In the corrugated cardboard sheet processing apparatus that is initially positioned by the mechanism (DB, DC, DD, DE), the sheet detection sensor (PHA) provided in the sheet supply path from the sheet supply device (12) to the printer unit (14) is Only while the passage of the corrugated cardboard sheet (10) is detected, the rotation number of the roll (24) is detected by the rotation detector (PGA) connected to the sheet feeding roll (24), and the sheet (1
By calculating the length (LP) in the feeding direction in (0) and subtracting the actual set length (CP) of the sheet (10) from the length (LP) in the sheet feeding direction, each corrugated cardboard sheet ( Calculate the deviation amount (XP) for each supply in 10), the deviation amount to the register value (RB, RC, RD, RE) after initial setting in the differential positioning mechanism (DB, DC, DD, DE) ( XP) is added respectively to obtain new set values (RB ', RC', RD ', RE') as correction target values, and the differential positioning mechanism in the first printer unit (14) is determined.
(DB) contains the newly set correction value at the timing when the sheet detection by the sheet detection sensor (PHA) is completed.
(RB '), and for subsequent printer units (16) and rotation units (18,20), the distance from the cylinder (26,30,32) in the adjacent upstream unit (16,18,20) The rotation detector (PG
A) Differential positioning mechanism (DC, DD, D) corresponding to each unit (16, 18, 20) at each timing when the value converted to the number of pulses in (A) is reached.
A sheet supply control method for a corrugated board sheet processing apparatus, characterized in that a newly set correction value (RC ', RD', RE ') is given to E). 2. A number of cardboard sheets (10) are stacked,
A sheet supply device (12) for pressing the sheets (10) delivered one by one by a sheet delivery roll (24, 24) and supplying the sheet to the downstream side, and arranged immediately downstream of the sheet supply device (12). , One or more printer units (1) for printing on the corrugated cardboard sheet (10) by the printing cylinders (26, 26) and the press cylinders (28, 28) arranged in a vertical relationship.
4,16) and the rotary cylinders (30,30,32,3) arranged immediately downstream of the printer unit (14,16) and arranged in a vertical relationship.
2) consists of a rotating unit (18, 20) that performs various processes such as slotting on the printed corrugated cardboard sheet (10), and each of the cylinders (26, 30, 32) has a corresponding differential positioning. In the corrugated cardboard sheet processing apparatus that is initially positioned by the mechanism (DB, DC, DD, DE), the sheet detection sensor (PHA) provided in the sheet supply path from the sheet supply device (12) to the printer unit (14) is Only while the passage of the corrugated cardboard sheet (10) is detected, the rotation number of the roll (24) is detected by the rotation detector (PGA) connected to the sheet feeding roll (24), and the sheet (1
A means for calculating the length (LP) in the feeding direction in (0), and subtracting the actual set length (CP) of the sheet (10) from the length (LP) in the sheet feeding direction, Means to calculate the deviation amount (XP) for each supply in the sheet (10), and register values (RB, RC, RD, RE) after initial setting in the differential positioning mechanism (DB, DC, DD, DE) By adding the deviation amount (XP), respectively, to obtain a new set value (RB ', RC', RD ', RE') as the correction target value, and in the first printer unit (14) Differential positioning mechanism
(DB) contains the newly set correction value at the timing when the sheet detection by the sheet detection sensor (PHA) is completed.
(RB ') is given, and for the printer unit (16) and the rotation unit (18, 20) thereafter, the adjacent upstream unit (1
Each unit (16,18,20) at each timing when the distance to the cylinder (26,30,32) in (6,18,20) reaches the value converted into the number of pulses of the rotation detector (PGA). For the differential positioning mechanism (DC, DD, DE) compatible with, the newly set correction value (R
A sheet feeding control device for a corrugated board sheet processing device, which is characterized by giving C ', RD', RE ').