JP2003231193A - System for producing corrugated cardboard sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To satisfy prescribed quality for a prescribed product condition of a corrugated cardboard sheet independent of the experience and know-how of an operator in a system for producing the corrugated cardboard sheet. <P>SOLUTION: An optimum operation condition information storage means 5A and a quality information acquisition means 5B are provided. When the fact that a prescribed product condition of the corrugated cardboard sheet 25 meets prescribed quality is acquired by the acquisition means 5B, the storage means 5A stores information on specified control elements which can affect the prescribed quality as information on an optimum operation condition. When information corresponding to a present production condition exists in the information on the optimum operation condition stored in the storage means 5A, a control means controls the specified control elements preferentially into the optimum operation condition. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated board sheet manufacturing system for manufacturing corrugated board sheets.

[0002]

2. Description of the Related Art In a corrugated cardboard sheet, one liner (back liner) is laminated with glued cores to form a one-stage sheet, and the other side liner (front liner) is attached to the core side of the one-stage sheet. A corrugated cardboard sheet is manufactured by laminating the above, and the corrugated cardboard sheet is cut into an appropriate length. In this manufacturing process, each sheet (back liner, front liner, single-sided sheet, corrugated cardboard sheet) is heated by each preheater such as a back liner preheater, single-sided sheet preheater, front liner preheater, etc., and a single facer or glue. Gluing is performed by a machine. At that time, if the heating amount and the gluing amount are not appropriate values, the finished corrugated cardboard sheet has a vertical warp in the width direction (hereinafter, simply referred to as a warp in the width direction) and a bonding failure (hereinafter, Problems such as (bonding failure) occur.

As for the warp in the width direction, for example, if the back liner has an excessive water content, it will be convex along the front liner side during drying, and if the front liner has an excessive water content, When it dries, it goes along the convex on the back liner side. Therefore, in the conventional corrugated sheet production management system, based on the production condition information such as the base paper composition, the basis weight of the used base paper, the paper width, and the flute, each preheater winding amount, each gap amount of the single facer and the glue machine, and By automatically adjusting the control elements such as double facer pressure by matrix control, we are trying to improve the quality by suppressing the warpage and sticking failure of the corrugated board sheets. According to this system, even when a special base paper configuration or a special processed base paper is used, it is possible to deal with it by setting the matrix in advance.

However, in an exceptional production state in which the moisture content differs between the front and back liners even if they have the same base paper composition, or when the moisture content differs even for the same type of base paper, the above-mentioned system is used. Even if the control element is automatically adjusted, the sheet temperature does not reach a predetermined appropriate temperature, and as a result, the finished corrugated cardboard sheet may be warped or stuck poorly.

Conventionally, with respect to warpage and bonding failure that may occur due to such exceptional operation, the operator visually observes the warpage and bonding state of the corrugated board sheet each time, and based on the operator's own experience and know-how. This has been addressed by manually adjusting each of the above control elements individually.

[0006]

However, in the adjustment method that relies on experience and know-how as described above, there is a problem that the sheet quality varies depending on the skill level of the operator. Further, even the same operator may repeat the adjustment many times or may make an erroneous operation, so that it is difficult to obtain stable sheet quality. Furthermore, as described above, there are many control elements to be adjusted, and the adjustment amount must be determined after checking the current amounts of these control elements, which is a complicated operation and takes time to adjust. There was also.

The present invention was devised in view of the above problems, and made it possible to satisfy a given quality for a given product state of a corrugated board sheet without relying on the experience and know-how of the operator. , An object is to provide a corrugated board sheet manufacturing system.

[0008]

In order to achieve the above object, a corrugated board sheet manufacturing system of the present invention (hereinafter referred to as a system) includes an operating state information obtaining means, a production state information obtaining means, and a controlled variable. Comprising a calculation means, quality information acquisition means, optimum operating state information storage means, and control means,
It is characterized by suppressing the warp in the width direction of the corrugated board sheet manufactured by the corrugated board sheet manufacturing apparatus by using each of these components.

First, the operation status information acquisition means is means for acquiring information on the operation status of the corrugated board sheet manufacturing apparatus. The information about the operating state includes the operating speed, the amount of sheet wound around each preheater, the vapor pressure of each preheater, the gap amount of each gluing device, the pressurizing force and vapor pressure of the double facer, and the wetting amount if a wetting device is provided. It refers to various information such as information regarding.

The production status information acquisition means is means for acquiring information regarding the production status of the corrugated board sheet manufacturing apparatus. The information on the production state refers to various information such as the composition of the base paper, the basis weight of the base paper used, the paper width, and the flute. The quality information acquisition means is means for acquiring that the predetermined product state of the corrugated board sheet manufactured by the corrugated board sheet manufacturing apparatus satisfies the predetermined quality, and for example, the predetermined product state of the corrugated board sheet is predetermined. The quality information input means is configured such that the operator judges that the quality is satisfied and inputs the quality. The predetermined product state here is, for example, a warped state of the corrugated cardboard sheet, and in this case, satisfying the predetermined quality means that the corrugated cardboard sheet has no warp.

The control amount calculation means calculates the control amount of each control element of the corrugated board sheet manufacturing apparatus based on the operating state information acquired by the operating state information acquiring means and the production state information acquired by the production state information acquiring means. It is a means for calculating. The optimum operating state information storage means, when the quality information acquiring means acquires that the predetermined product state of the corrugated board sheet satisfies the above predetermined quality, the operating state acquired by the operating state information acquiring means. It is a means for storing, among the information, information on the specific control element that affects the above-mentioned predetermined quality as information on the optimum operating state in the production state when the input is made by the quality information obtaining means.

When the predetermined product state of the corrugated board sheet is, for example, the warped state of the corrugated board sheet, the specific control element is a control element that typically affects the moisture content of the back liner or the front liner. Specifically, the heating amount of the back liner in the back liner heating means, the amount of paste to the core in the single facer, the heating amount of the single-sided sheet in the single-sided sheet heating means, the heating of the front liner in the front liner heating means There are various control elements for controlling the amount, the amount of glue applied to the single-stage sheet in the glue machine, the heating amount of the corrugated board sheet in the double facer, and the like.

More specifically, regarding the control of the heating amount of each sheet (back liner, single-stage sheet, front liner) in each heating means (back liner heating means, single-stage sheet heating means, front liner heating means), It is the winding amount of each sheet around each heating roll by the winding amount adjusting means, and / or the vapor pressure supplied to each heating roll. Regarding the control of the amount of glue applied to the core in the single facer, in the process of supplying the glue to the core conveyed by the corrugated rolls, such as between the corrugating rolls and the gluing rolls or between the rolls forming the gluing device. It is a gap amount between at least one roll among a certain one or a plurality of rolls. Further, regarding the control of the amount of gluing to the single-stage sheet in the glue machine, it is the amount of the gap between the gluing rolls arranged along the traveling line of the single-stage sheet and the traveling line.
Also, regarding the control of the heating amount of the corrugated board sheet in the double facer, the pressure applied to press one side of the corrugated board sheet by the pressurizing device to the heating board arranged along the traveling line of the corrugated board sheet, the steam supplied to the heating board. The pressure is the traveling speed of the corrugated board sheet on the hot platen.

Further, the corrugated board sheet manufacturing apparatus is provided with a back liner wetting device for wetting the back liner before or after sticking the single-sided sheet and the front liner by the double facer, and a front liner wetting device for wetting the front liner. If so, the amount of back liner wetting by the back liner wetting device and / or the amount of front liner wetting by the front liner wetting device may also be included in the particular control element. As a wetting method, there are a method of spraying water on the sheet with a shower device, a method of watering the sheet with a watering roll, and the like.

If the optimum operating condition information stored in the optimum operating condition information storage means corresponds to the current production status, the control means gives priority to the optimum operating condition of the specific control element. It is a means for controlling the state. The control means may control at least one of the specific control elements. With such a configuration, when the current production state matches the previously performed production state, the specific control element is automatically controlled to the optimum operating state in the previously performed production state. Therefore, the quality of the corrugated board sheet can be secured without relying on the experience and know-how of the operator.

It is preferable that the system further includes a warp state information acquisition means and a control element selection means. The warp state information acquisition unit is a unit that acquires information about the warp state of the corrugated board sheet manufactured by the corrugated board sheet manufacturing apparatus. The warp state information acquisition unit includes, for example, a selection unit that allows the operator to select any one of a plurality of options indicating the warp state of the corrugated cardboard sheet, and the option selected by the selection unit relates to the warp state of the corrugated cardboard sheet. It is configured to be acquired as information.

Alternatively, the warp state information acquisition means is an image pickup means for picking up an image of the corrugated board sheet manufactured by the corrugated board sheet manufacturing apparatus, and a detection means for detecting the warp of the corrugated board sheet based on the image information obtained by the image pickup means. With and
The information detected by the detection means is configured to be acquired as information regarding the warp state of the corrugated board sheet. Alternatively, the warp state information acquisition means is a displacement amount measuring means for detecting a vertical displacement amount of the corrugated cardboard sheet manufactured by the corrugated cardboard sheet manufacturing apparatus, and a warp of the corrugated cardboard sheet based on the displacement amount information obtained by the displacement amount measuring means. And detecting means for detecting the information, and is configured to acquire the information detected by the detecting means as the information regarding the warped state of the corrugated board sheet.

Alternatively, the warp state information acquiring means includes a water content detecting means for detecting the water content of the back liner and the front liner, or a water content detecting means for detecting a parameter correlated with the water content, respectively.
And a detection unit that detects the warp of the corrugated board sheet based on the information obtained by the water content detection unit, and the information detected by the detection unit is acquired as information regarding the warped state of the corrugated board sheet. The water content detecting means is, for example, a temperature sensor or a water sensor.

Further, the control element selecting means selects, from among a plurality of specific control elements that influence the moisture content of the back liner or the front liner, among the control elements of the corrugated board sheet manufacturing apparatus, the warp state of the corrugated board sheet and each control. It is a means for selecting at least one of the elements depending on the influence of the element on the warp of the corrugated board. In this case, the control amount calculation means calculates the control amount of the selected specific control element based on the warp state information of the corrugated board sheet and the operating state information of the corrugated board sheet manufacturing apparatus. The control means uses the control amount calculated by the control amount calculation means when the optimum operation state stored in the optimum operation state information storage means does not correspond to the current production state. , Controlling the selected specific control element.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The corrugated cardboard sheet of the present invention is
Although it is possible to ensure a predetermined quality for a predetermined product state by automatic control, in each embodiment, an example will be described in which control is performed to suppress vertical warp of the corrugated board sheet in the width direction.

(A) First Embodiment FIG. 1 is a diagram showing an outline of a corrugated board sheet manufacturing system according to a first embodiment of the present invention. The corrugated board sheet manufacturing system according to this embodiment includes a corrugated board sheet manufacturing apparatus 1 and a production management apparatus 2 that controls the corrugated board sheet manufacturing apparatus 1.

The corrugated board sheet manufacturing apparatus 1 mainly comprises a back liner preheater 10 for heating the back liner 20, a core preheater 12 for heating the core 21, and a core 21 heated by the core preheater 12. Back liner 20 which is lined up and glued and heated by back liner preheater 10.
To the single facer 11 for bonding, the single-sided sheet preheater 13 for heating the single-sided sheet 22 formed by the single facer 11, the front-side liner preheater 14 for heating the front-side liner 23, and the single-sided sheet 22 heated by the single-sided sheet preheater 13 Glue machine 1
5, single-sided sheet 2 glued by glue machine 15
The front liner 2 heated by the front liner preheater 14 in FIG.
A double facer 16 for laminating 3 to form a corrugated board sheet 24, a slitter scorer 17 for scoring and grooving the corrugated board sheet 24 formed by the double facer 16, and a corrugated board sheet 24 scoring by the slitter scorer 17 for dividing plates. It is provided with a cut-off 18 for cutting a corrugated sheet into a corrugated sheet (plate corrugated sheet) 25 as a final product, and a stacker 19 for stacking the corrugated sheet 25 in the order of completion.

Of these constituent devices 10 to 19, a device that affects the water content of the back liner 20 and the front liner 2
The device that affects the water content of 3 is a device related to the warp of the corrugated board sheet 25 in the width direction.
Back liner preheater 10, single-stage seat preheater 13,
The front liner preheater 14, the single facer 11, the glue machine 15, and the double facer 16 correspond. Hereinafter, detailed configurations of these devices 10, 11, 13 to 16 will be described with reference to FIGS. 2 to 4. 2 is a schematic diagram showing the configuration of the back liner preheater 10, the single facer 11, and the center core preheater 12, and FIG. 3 shows a part of the single-stage seat preheater 13, the front liner preheater 14, the glue machine 15, and the double facer 16. FIG. 4 is a schematic diagram showing the configuration, and FIG. 4 is a schematic diagram showing the configuration of the double facer 16.

As shown in FIG. 2, the back liner preheater 1
0 is the back liner heating roll 101 vertically arranged in two stages
Equipped with A and 101B. Back liner heating roll 101
A and 101B are heated to a predetermined temperature by supplying steam to the inside. Back liner heating roll 101
Guide rolls 105, 104 are provided on the peripheral surfaces of A and 101B.
The back liner 20 which is guided in order by A, 106 and 104B is wound around the back liner heating rolls 101A and 1B.
It has been preheated by 01B.

Guide rolls 105, 104A, 106,
A guide roll 104A provided near one of the back liner heating rolls 101A out of 104B is supported by the tip of an arm 103A swingably attached to the shaft of the back liner heating roll 101A, and the other back liner heating roll 101A. Guide roll 104 provided close to the heating roll 101B
B is supported by the tip of an arm 103B that is swingably attached to the shaft of the back liner heating roll 101B.
Each arm 103A, 103B can be moved to an arbitrary position within an angle range shown by an arrow in the drawing by a motor (not shown). Here, the guide roll 10
4A, arm 103A and a motor (not shown), and
The guide roll 104B, the arm 103B, and the motor (not shown) are wound by the winding amount adjusting devices 102A and 10B, respectively.
It constitutes 2B.

With such a configuration, in the back liner preheater 10, the vapor pressure supplied to the back liner heating rolls 101A and 101B and the winding amount adjusting devices 102A and 10B.
Back liner heating roll 101 of back liner 20 by 2B
The amount of water contained in the back liner 20 can be adjusted by the amount of winding (wrapping angle) around A and 101B. Specifically, as the vapor pressure is larger and the winding amount is larger, the amount of heating given to the back liner 20 from the back liner heating rolls 101A and 101B is increased, and the back liner 20 is dried and the water content is increased. Will be reduced.

The single facer 11 is a belt roll 1
11 and a pressure belt 11 wound around a tension roll 112
3, an upper roll 114 having a corrugated surface and abutting against the pressure belt 113 in a pressed state, and a lower roll 1 having a corrugated surface and meshing with the upper roll 114.
It is equipped with 15. The back liner 20 heated by the back liner preheater 10 is wrapped around the liner preheating roll 117 to be preheated and then the belt roll 11
It is guided by 1 and is transferred together with the pressure belt 113 to the nip portion between the pressure belt 113 and the upper roll 114. On the other hand, the core 21 heated by the core preheater 12
Is preheated by being wound around the core preheating roll 118, and is run at the meshing portion of the upper roll 114 and the lower roll 115, and then guided by the upper roll 114 and the pressure belt 113 and the upper roll. It is transferred to the nip portion with the roll 114.

A gluing device 116 is arranged near the upper roll 114. The gluing device 116 is a gluing roll 116 for gluing the glue dam 116 a storing the glue 30 and the core 21 conveyed by the upper roll 114.
b, a meter roll 116c for adjusting the amount of the glue 30 attached to the peripheral surface of the gluing roll 116b, and a meter roll 11
It is composed of a glue scraping blade 116d for scraping glue from 6c. The core 21 rolled up at the meshing portion of the upper roll 114 and the lower roll 115 is glued to the tops of the stages by the glue roll 116b, and the pressure belt 1
It is bonded to the back liner 20 at the nip portion between the upper roller 13 and the upper roll 114. Thereby, the one-step sheet 22 is formed.

With such a configuration, in the single facer 11, the back liner 20 is adjusted depending on the amount of the gap between the sizing roll 116b and the upper roll 114 and the amount of the gap between the sizing roll 116b and the meter roll 116c.
The water content of can be adjusted. Specifically, the larger the gap amount, the larger the amount of glue on the bonding surface between the core 21 and the back liner 20, and the moisture content of the glue increases the amount of water contained in the back liner 20. The amount of each gap can be adjusted by moving the sizing roll 116b or the meter roll 116c.

The core preheater 12 has the same structure as the back liner preheater 11, and the core preheater 121 is heated to a predetermined temperature by supplying steam into the core preheater 121 and the core preheater 121. Winding amount adjusting device 12 for adjusting the winding amount (winding angle) of the inner core 21
2 and. The winding amount adjusting device 122 includes a guide roll 124 around which the core 21 is wound, an arm 123 swingably attached to the shaft of the core heating roll 121 to support the guide roll 124, and a rotating arm 123. Not composed of a motor.

The single-stage seat preheater 13 and the front liner preheater 14 are vertically arranged in two stages as shown in FIG. These preheaters 13 and 14 have the same structure as the back liner preheater 11 described above. The single-stage sheet preheater 13 includes a single-stage sheet heating roll 131 and a winding amount adjusting device 132. The single-stage sheet heating roll 131 is heated to a predetermined temperature by supplying steam inside. One-sided sheet heating roll 1
On the peripheral surface of 31, the back liner 20 side of the one-step sheet 22 guided in order by the guide rolls 135 and 134 is wound and preheated by the one-step sheet heating roll 131.

The winding amount adjusting device 132 includes one guide roll 134, an arm 133 swingably attached to the shaft of the single-stage sheet heating roll 131 to support the guide roll 134, and a motor (not shown) for rotating the arm 133. It consists of and. Then, by controlling the motor, the guide roll 134 is moved to an arbitrary position within the angle range shown by the arrow in the drawing, and the single-stage sheet heating roll 1 is moved.
The winding amount (wrapping angle) of the single-sided sheet 22 around 31 can be adjusted.

With such a configuration, in the single-stage sheet preheater 13, the vapor pressure supplied to the single-stage sheet heating roll 131 and the single-stage sheet heating roll 13 of the single-stage sheet 22.
Back liner 20 depending on the winding amount (wrapping angle) around 1
The water content of can be adjusted. Specifically, the larger the vapor pressure and the larger the winding amount,
The amount of heat given to the back liner 20 from the single-stage sheet heating roll 131 increases, the back liner 20 is dried, and the water content decreases.

The front liner preheater 14 includes a front liner heating roll 141 and a winding amount adjusting device 142. The front liner heating roll 141 is heated to a predetermined temperature by supplying steam to the inside. The guide rolls 145, 1 are provided on the peripheral surface of the front liner heating roll 141.
The front liner 23, which is sequentially guided by 44, is wound and preheated by the front liner heating roll 141.

The winding amount adjusting device 142 includes one guide roll 144, an arm 143 swingably attached to the shaft of the front liner heating roll 141 to support the guide roll 144, and a motor (not shown) for rotating the arm 143. It consists of and. Then, by controlling the motor, the guide roll 144 is moved to an arbitrary position within the angle range shown by the arrow in the figure, and the front liner heating roll 141 is moved.
The amount of wrapping (wrapping angle) of the front liner 23 around the front liner 23 can be adjusted.

With such a configuration, in the front liner preheater 14, depending on the vapor pressure supplied to the front liner heating roll 141 and the winding amount (wrapping angle) of the front liner 23 around the front liner heating roll 141, the front liner 23 can be wound. The water content can be adjusted. Specifically, as the vapor pressure is larger and the winding amount is larger, the heating amount given from the front liner heating roll 141 to the front liner 23 is increased, the drying of the front liner 23 progresses, and the water content decreases. Will be done.

The glue machine 15 comprises a gluing device 151 and a pressure bar device 152. The one-stage sheet 22 heated by the one-stage sheet pre-heater 13 is preheated by the one-stage preheating roll 155 on the way and then guided in the glue machine 15 in order by the guide rolls 153 and 154. The gluing device 151 is the guide roll 1
The pressure bar device 152 is disposed between 53 and 154 below the traveling line of the one-sided sheet 22 (on the side of the core 21).
Is arranged on the upper side of the traveling line (on the side of the back liner 20).

The gluing device 151 includes a gluing dam 151a in which the gluing 31 is stored, a gluing roll 151b arranged in the vicinity of the traveling line of the one-sided sheet 22, and a gluing roll 151.
It is composed of a gluing roll 151b in contact with b and a doctor roll 151c rotating in the opposite direction. On the other hand, the pressure bar device 152 is composed of a pressure bar 152a arranged so as to sandwich the one-step sheet 22 with the gluing roll 151b, and an actuator 152b for pressing the pressure bar 152a to the gluing roll 151b side. There is. The one-sided sheet 22 is applied to the gluing roll 151 by the pressure bar 152a.
The sizing roll 1 is pressed against the b side and passes through between the pressure bar 152a and the sizing roll 151b.
It is adapted to be glued to each top of the step of the core 21 by 51b. Single-sided sheet 2 glued to the core 21
2 is the front liner 23 by the double facer 16 in the next process.
Is pasted with.

With such a configuration, the glue machine 15
Then, the water content of the front liner 23 can be adjusted by the gap amount between the gluing roll 151b and the pressure bar 152a (that is, the gap amount of the gluing roll 151b with respect to the traveling line of the one-step sheet 22).
Specifically, the larger the gap amount, the larger the amount of glue on the bonding surface between the core 21 and the front liner 23, which increases the amount of water added to the front liner 23, thereby increasing the water content of the front liner 23. Will increase. The gap amount can be adjusted by adjusting the position of the pressure bar 152a with the actuator 152b.

The one-sided sheet 22 glued by the glue machine 15 is transferred to the double facer 16 in the next step. The front liner 23 heated by the front liner preheater 14 also passes through the inside of the glue machine 15 and the double facer 1.
Transferred to 6. At this time, the front liner 23 is preheated from the liner preheating roll 156 while being guided by the liner preheating roll 156 arranged in the glue machine 15.

At the entrance of the double facer 16, a first shower device (back liner wetting device) 161A is arranged on the back liner 20 side along the running line of the single-stage seat 22, and a second shower device (back liner wetting device) 161A is installed along the running line of the front liner 23. A shower device (front liner wetting device) 161B is arranged. These shower devices 161A and 161B are for adjusting the water content of the back liner 20 and the front liner 23, and from the shower device 161A to the back liner 20,
Water is sprayed from the shower device 161B toward the front liner 23. And the shower device 16
The water content of the back liner 20 increases according to the shower amount from 1A, and the water content of the front liner 23 increases according to the shower amount from the shower device 161B. The shower devices 161A and 161B are controlled independently of each other.

As shown in FIG. 4, the double facer 16 is divided into a heating section 16A on the upstream side and a cooling section 16B on the downstream side along the running line of the single-stage seat 22 and the front liner 23. Of these, a plurality of heating plates 162 are arranged in the heating section 16A, and the front liner 23 is arranged in the heating plate 1
It is designed to pass over 62. The heating plate 162 is heated to a predetermined temperature by supplying steam to the inside.

On the hot platen 162, a loop-shaped pressure belt 163 is running in synchronism with the one-step seat 22 and the front liner 23 across the above running line, and the pressure belt 1
A plurality of pressurizing units 164 are provided in the heating plate 1 in the loop 63.
It is arranged so as to face 62. Pressure unit 1
Reference numeral 64 denotes a pressure bar 1 that is in sliding contact with the back surface of the pressure belt 163.
64a and an actuator 164b for pressing the pressure bar 164a against the heating plate 162 side.

The one-sided sheet 22 glued by the glue machine 15 is carried in between the pressure belt 163 side and the heating plate 162 from the pressure belt 163 side. On the other hand, the front liner 23 heated by the front liner preheater 14 is preheated by the liner inlet preheating roll 165, and then the hot platen 16 is heated.
It is carried in between the pressure belt 163 and the heating plate 162 from the second side. Then, the one-sided sheet 22 and the front liner 23 are carried in between the pressure belt 163 and the heating plate 162, respectively, and then are transferred integrally to the cooling section 16B in a state of being vertically overlapped. . During this transfer, the single-sided sheet 22 and the front liner 23 are kept in contact with the pressure unit 1
By being heated from the side of the front liner 23 while being pressed by 64 via the pressing belt 163, the corrugated cardboard sheets 24 are bonded to each other. Cardboard sheet 2
The entire width or the end of No. 4 is cut by the rotary shear 166 provided at the outlet of the cooling section 16B, and is transferred to the slitter scorer 17 in the next step.

With such a configuration, the double facer 1
In No. 6, the amount of water contained in the front liner 23 can be adjusted by the vapor pressure supplied to the heating plate 162 and the pressure applied by the pressurizing unit 164. Specifically, as the vapor pressure is higher and the applied pressure is higher, the amount of heating given from the heating plate 162 to the front liner 23 is increased, and the front liner 23 is dried to lower the water content. become. Further, the water content of the front liner 23 can also be adjusted by the speed at which the single-sided sheet 22 and the front liner 23 pass through the double facer 16. In this case, the slower the passing speed, the longer the contact time of the front liner 23 with the heating plate 162, so that the drying of the front liner 23 progresses and the water content decreases.

The production control device 2 is provided with each of these devices 10, 1.
1, 13 to 16 are appropriately controlled. As shown in FIG. 1, the control amount calculation unit 4, the process controller 5, the optimum operation state storage unit 5A, and the warp state OK button (quality information acquisition unit, quality information input unit). ) 5B.

The control amount computing section 4 has a function as a production status information acquisition means of the present invention, and is adapted to acquire production status information from a higher-level production management system (not shown). Then, the control amount calculation unit 4 calculates each control amount according to the production state information and the machine state (operating state) of the corrugated board sheet manufacturing apparatus 1 acquired via the process controller 5, and controls the calculation result. It is designed to be output to the process controller 5 as a command. Further, the process controller 5 controls each control element based on a control command from the control amount calculation unit 4. In this way, the matrix control is performed by the control amount calculation unit 4 and the process controller 5 based on the production state information and the operation state information.

Further, the process controller 5 always grasps the machine state of the corrugated board sheet manufacturing apparatus 1,
The current machine state is output to the control amount calculation unit 4 periodically or in response to a request from the control amount calculation unit 4. That is, the process controller 5 functions as a control unit and an operation state information acquisition unit according to the present invention. In addition,
The machine state refers to the operating speed of the corrugated board sheet manufacturing apparatus 1 (sheet traveling speed), each heating roll 101A, 101.
B, 131, 141 winding amount of the sheet, vapor pressure of each heating roll 101A, 101B, 131, 141, gap amount between rolls 116b, 114 and rolls 116b, 116c in the single facer 11, glue machine 15, The gap amount between the gluing roll 151b and the pressure bar 152a, the pressure of the pressure unit 164 in the double facer 16 and the vapor pressure of the heating plate 162,
And the present values of the shower amounts of the shower devices 161A and 161B.

In the present corrugated board sheet manufacturing system, the fact that there is no warp in the corrugated board sheet can be input to the production management device 2 by pressing the warp state OK button 5B, and the operator can operate the stacker 19 on the stacker 19. Alternatively, the warp state of the corrugated board sheet being conveyed from the double facer 16 to the stacker 19 is visually confirmed, and if there is no warp, the warp state OK button 5B is pressed.

As a result, various production state information and various operating state information at the time when the warp state OK button 5B is pressed are output from the control amount computing section 4 to the optimal operating state storage section 5A, and the optimal operating state storage is performed. The unit 5A stores the production state information and the operation state information in association with each other as a data set.
That is, the operation state when the warp state OK button 5B is turned on is stored as the optimum operation state in the production state when the button is turned on.

In the optimum operation state storage section 5A, at least one production state information and at least one operation state information are selected from among those which affect the warp of the corrugated board sheet and are stored in association with each other. Here, the paper width, flute, base paper composition and base paper basis weight are stored as the production state information, and specific control that affects the water content of the back liner 20 and the front liner 23 and thus the warp of the corrugated cardboard sheet is stored as the operation state information. As elements, double facer speed (passing speed of the single-sided sheet 22 and the front liner 23 on the double-facer 16), a single-sided sheet preheater winding amount in the single-sided sheet preheater 13, a front liner preheater winding amount in the front liner preheater 14, and a back side in the back liner preheater 10. Liner preheater winding amount, shi Gurufesa glue gap amount (the gap amount between the glue roll 116b and the upper roll 114 (or glue roll 116b and the meter rolls 116c
Gap amount), glue machine glue gap amount (gap amount between gluing roll 151b and pressure bar 152a), and double facer pressure force (pressure force of pressure unit 164). .

Then, the process controller 5 is
As mentioned above, the production status information is always known. For example, when the order of corrugated cardboard sheets is switched and the production status is changed, the current production status and the production status match (here, paper width, flute). , The base paper composition and the base paper basis weight match (including not only complete match but also approximate match)] The optimum operating state storage unit 5A is searched for a data set.

When the desired data set is found, the process controller 5 reads the operating state information of this data set as the optimal operating state information and controls the corresponding control elements so as to be in this optimal operating state. It is like this. This can be seen when the optimum driving state information is taught from the optimum driving state storage unit 5A,
Hereinafter, this control is referred to as teaching control. On the other hand, if the optimum operation state information corresponding to the current production state is not found in the optimum operation state storage unit 5A, the process controller 5 performs normal matrix control.

As described above, according to the corrugated board sheet manufacturing system of this embodiment, the corrugated board sheet 25 manufactured by the operator by the corrugated board sheet manufacturing apparatus 1 is used.
The warp state is visually determined, and if there is no warp in the corrugated cardboard sheet 25, the warp state OK button 5B is pressed to store the operating state at this time as the optimum operating state corresponding to the current production state. When the operation is performed according to the production state, the teaching control is performed to control the double facer speed, the one-stage sheet preheater winding amount in the one-stage sheet preheater 13, the front liner preheater winding amount in the front liner preheater 14, and the back liner preheater winding amount in the back liner preheater 10. Since the single facer glue gap amount, the glue machine glue gap amount, and the double facer pressure force are automatically adjusted to the above-mentioned optimum operating conditions, the corrugated cardboard sheet 25 can be accurately and easily relied on without relying on the experience and know-how of the operator. Suppress warpage Kill.

In the feedback control for detecting the warp state actually occurring in the corrugated board sheet 25 and correcting the warp based on the detected warp state, in the case of a short order (when the order of the corrugated board sheet is switched in a short period of time), such feedback is performed. A device that allows the liners 20 and 23, which are placed in a short order rather than controlled, to correct warpage (in this case,
Single-stage seat preheater 13, front liner preheater 14,
There is a risk that the back liner preheater 10) may have passed and the warp may not be suppressed. However, according to the present system, even if the order is short, the order is switched and the production state of the corrugated board sheet manufacturing apparatus 1 is switched, and at the same time, the specific control element is controlled to the optimum operating state, so that the warpage is prevented. There is an advantage that it can be suppressed.

(B) Second Embodiment FIG. 5 shows the construction of a corrugated board sheet manufacturing system as a second embodiment of the present invention. As shown in FIG. 5, the corrugated board sheet manufacturing system is different from the corrugated board sheet manufacturing system of the first embodiment described above.
A warp prevention support system including the knowledge database 3 and the warp state input unit 6 is added. That is, the production management device 2 of the present embodiment includes the knowledge database 3, the control amount calculation unit 4, the process controller 5, the optimum operation state storage unit 5A, the warp state OK button 5B, and the warp state input unit 6.

Among the control elements for controlling the corrugated board sheet manufacturing apparatus 1, the knowledge database 3 sets the control amount (adjustment amount from the current value) of a specific control element that influences the warp of the corrugated cardboard sheet 25. A value or a setting formula for setting the control amount is determined and stored corresponding to each warp state (warp direction and warp size) of the corrugated board sheet 25.

For example, when the corrugated cardboard sheet 25 is warped (convex toward the front liner 23 side), the water content of the front liner 23 is increased or the water content of the back liner 20 is decreased. The set value or setting formula of the control amount of each control element is defined. On the contrary, when the corrugated cardboard sheet 25 is warped (convex toward the back liner 20 side), the back liner 2
The set value or setting formula of the control amount of each control element is set so as to increase the water content of 0 or decrease the water content of the front liner 23.

Further, the set value or setting formula of each control element is set in accordance with a predetermined priority order. The priority order here is a priority order on the output. For example, when the degree of warpage is small, only the control element with a high priority order is output, and as the degree of warpage increases, other priority levels are sequentially output. The control element is specified to be additionally output. The priority is set higher for a control element that has a greater influence on the warp, in other words, a control element that has a higher force for correcting the warp.

FIG. 6 shows the structure of the knowledge database 3 according to this embodiment. Here, the types of the warped state of the corrugated cardboard sheet 25 correspond to the types of push buttons to be described later, with large warpage, medium upward warpage, small upward warpage, large downward warpage,
Six types of warping and small warping are set, and the control element to be output is determined according to the priority order for each warping state. In this embodiment, the one-stage sheet preheater winding amount (the one-stage sheet 22 winding amount around the one-stage sheet heating roll 131), the front liner preheater winding amount (the front liner 23 winding amount around the front liner heating roll 141),
And the back liner preheater winding amount (the winding amount of the back liner 20 around the back liner heating roll 101) is set as a control element (specific control element), and the single-stage sheet preheater winding amount and the front liner preheater winding amount are both priority 1, The winding amount of the back liner preheater is set to be priority 3.

In FIG. 6, a circle (○) or a double circle (◎)
The control element marked with is the control element output in the warped state. Also, the circles and double circles indicate the magnitude of the control amount (adjustment amount from the current value), and when comparing with the same control element, the double circle indicates that the control amount is greater than the circle. It shows that it is big. Therefore, in the present embodiment, for example, when the warp state of the corrugated cardboard sheet 25 is a small amount of warp, only the one-stage sheet preheater winding amount and the front liner preheater winding amount are adjusted, and when the warp state is during warp, Similarly, only the one-stage sheet preheater winding amount and the front liner preheater winding amount are adjusted, but the adjustment amount is increased. Further, when the warp state is large warp, the back liner preheater winding amount is also adjusted. . The specific setting value or setting formula of each control element is determined by a test or a simulation.

In this embodiment, the warp state of the corrugated board 25 is manually input by the operator in the warp state input section (warp state information acquisition means) 6.
The warp state input unit 6 has six push buttons 61 (large warp), 62 (medium warp), 63 (small warp), 65 (large warp) according to each warp state classified in the knowledge database 3. ), 66 (during downward camber), 67 (small downward camber), and a reset button 64. When the operator selects and presses the corresponding button, the selection signal is input to the control amount calculation unit 4. It is like this. The corrugated cardboard sheet 25
As for the warped state, the operator visually judges the corrugated cardboard sheets 25 stacked on the stacker 19.

The control amount calculation unit 4 searches the knowledge database 3 based on the selection signal from the warp state input unit 6. Then, the set value or set expression of the control amount of each corresponding control element is read from the knowledge database 3, and each control amount according to the machine state (operating state) of the corrugated board sheet manufacturing apparatus 1 is calculated. In the present embodiment, the control amount calculation unit 4 and the knowledge database 3 have a configuration including a control element selection unit according to the present invention.

When the reset button 64 is selected in the warp state input unit 6, the control amount calculation unit 4 sets all control elements to original values (base paper configuration, basic paper weight, paper width, flute, etc.). A command is sent to the process controller 5 so as to return the value to the value determined by the matrix control based on the production state information.

The process controller 5 comprehensively controls the respective devices 10 to 19 which compose the corrugated board sheet manufacturing apparatus 1. When the optimum operating state storage unit 5A does not store the optimum operating state corresponding to the current production state, the process controller 5 normally controls the respective devices 10 to 19 by matrix control based on the production state information. However, the push buttons 61 to 63,
When 65 to 67 are pressed, the control element of the corresponding device (here, the one-stage sheet preheater winding amount in the one-stage sheet preheater 13, the front liner preheater winding amount in the front liner preheater 14, the back liner preheater in the back liner preheater 10) Any one of the winding amounts or a combination thereof is controlled by the control amount calculated by the control amount calculating unit 4. Also, the reset button 6
When 4 is pressed, each device 10, 13, 14 is controlled to return all control elements to their original values.

As described above, the system according to the present embodiment is provided with the optimum operation state storage section 5A and the warp state OK button 5B as in the first embodiment, so that the operator can operate on the downstream side of the double facer. When it is visually confirmed that the corrugated board sheet has no warp and the warp state OK button 5B is pressed, the operation state at this time is stored in the optimum operation state storage unit 5A as the optimum operation state in the current production state. Has become.

When the order change is performed, the process controller 5 searches the optimum operation state storage section 5A for the optimum operation state corresponding to the current production state, and when the optimum operation state is found. In accordance with the teaching control, predetermined specific control elements (here, in particular, the double facer speed, the single-stage sheet preheater winding amount in the single-stage sheet preheater 13, the front liner preheater winding amount in the front liner preheater 14, The back liner preheater winding amount, the single facer glue gap amount, the glue machine glue gap amount, and the double facer pressure force) in the liner preheater 10 are each preferentially adjusted to the optimum operating state.

The function of the production control device 2 described above is represented by a flow chart of a series of processes for correcting the warp of the corrugated cardboard sheet 25, which is shown in the flowchart of FIG. First,
The production management device 2 checks the machine state in step S10, and checks the production state in step S20. Next, in step S25, it is searched whether or not the optimum operating state corresponding to the current production state checked in step S20 is stored in the optimal operating state storage unit 5A. If there is a corresponding one, the process proceeds to step S27 and teaching control is performed. Done,
On the other hand, if there is no corresponding one, the process proceeds to step S30.

In step S30, it is determined whether or not the warp state can be input (the push buttons 61 to 67 can be pressed). This does not make sense to correct the warp in the situation where the adhesive force is too strong and the sheet speed does not increase, etc.Therefore, if there is any other trouble, correct the warp. This is a process to prevent it.
When the warp state can be input in step S30, it is determined in step S40 whether the warp state is actually input. If the warp state is input, in step S50, the control element to be controlled according to the priority order in accordance with the input warp state, that is, the selected push buttons 61 to 63, 65 to 67 (here, the control element). One-stage sheet preheater winding amount, front liner preheater winding amount, back liner preheater winding amount, or a combination thereof) is selected. On the other hand, as a result of the determination in step S40, if the warp state is not input, the process proceeds to step S45 and the matrix control is performed.

Subsequently, in step S60, the control amount corresponding to the machine state information acquired in step S10 is calculated with reference to the knowledge database 3 for the selected control element. At this time, the production state information acquired in step S20 may be used as reference data such as changing the winding amount depending on the difference in the base paper configuration (thick paper or thin paper). Then, in step S70, the calculated control amount is output to the corresponding device (here, any one of the one-stage sheet preheater 13, the front liner preheater 14, and the back liner preheater 10 or a combination thereof).

As described above, according to the corrugated board sheet manufacturing system of the present embodiment, even if the optimum operating state corresponding to the current production state is not stored in the optimum operating state storage section 5A, the operator does not have to do so. The warpage state of the corrugated board sheet 25 manufactured by the manufacturing apparatus 1 is visually determined, and the buttons 61 to 63, 65 corresponding to the warpage state are determined.
The production management device 2 automatically adjusts the single-stage sheet preheater winding amount, the front liner preheater winding amount, and the back liner preheater winding amount that affect the warpage of the corrugated cardboard sheet 25 by simply pressing 67. The warp of the corrugated board sheet 25 can be accurately and easily corrected without relying on know-how.

At this time, the production control device 2 sequentially selects additional control elements according to a predetermined priority in accordance with the amount of warp of the corrugated cardboard sheet 25, so that the correction is performed according to the amount of warp. The degree can be increased, and the warp of the corrugated board sheet 25 can be immediately corrected. In particular, by setting the priority to be higher for a control element having a greater influence on the warp of the corrugated board sheet 25 as in the present embodiment, the warp of the corrugated board sheet 25 can be corrected more quickly.

In this embodiment, the push buttons 61 to 67 are used.
When is pressed, the corrugated cardboard sheet 25 is controlled using the one-stage sheet preheater winding amount, the front liner preheater winding amount, and the back liner preheater winding amount as control elements.
Although the case of correcting the warp has been described, this is merely an example, and the types of control elements to be controlled may be increased. Specific examples of control elements that can be added include a single facer glue gap amount, a glue machine glue gap amount, a double facer pressure force, a double facer speed, a double facer vapor pressure, a back liner side shower amount, and a front liner shower amount.

(C) Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIGS. The present embodiment is characterized by means for acquiring information regarding the warped state of the corrugated board sheet 25, and other configurations are similar to those of the second embodiment.

As shown in FIG. 8, the production control apparatus 2 according to the present embodiment is different from the second embodiment in that a warp state determination section (detection section) 8 is used instead of the warp state input section (push button) 6. It is equipped with it. Further, a CCD camera (image pickup means) 7 is provided at the end of the corrugated board sheet manufacturing apparatus 1. The CCD camera 7 is arranged in the stack portion 192 of the stacker 19 as shown in FIG. The corrugated cardboard sheet 25 cut by the cutoff 18 is conveyed to the stack portion 192 by a plurality of conveyors 191.
They are loaded in order. The CCD camera 7 images the cardboard sheets 25 stacked on the stack portion 192 from the side surface in the width direction, and outputs the image information to the warp state determination portion 8.

The warp state determination unit 8 processes the image information from the CCD camera 7 to measure the heights of three predetermined points (both ends and the center) of the corrugated board sheet 25 in the width direction. Then, from the variation in the measured height, the corrugated cardboard sheet 25
The warp direction (upward or downward) in the width direction and the degree of height (large, medium, or small) are determined. The determination result is sent to the control amount calculation unit 4, and the control amount calculation unit 4 selects a control element based on this determination result, and refers to the knowledge database 3 to control the selected control element according to the machine state information. Calculate the quantity.

Here, the determination of the warp state by the warp state determination unit 8 will be specifically described with reference to FIGS. 10 (a) and 10 (b). As shown in FIG. 10A, the CCD camera 7 is adapted to photograph the side surface of the corrugated board sheet 25 in the width direction. Then, the warp state determination unit 8 performs image processing on the image information from the CCD camera 7 to perform the cardboard sheet 25.
Vertical displacement amounts a, b, and c with respect to the reference line L0 at predetermined three points in the width direction (the operating-side corner PA, the driving-side corner PC, and the sheet center PB) are calculated.

Then, the warp state determining portion 8 uses the vertical displacement amounts a, b and c to vertically flip up the corners PA and PB from the floor plane when the corrugated cardboard sheet 25 is placed on the floor plane. The amounts A and C are calculated as shown in the following equations (1) and (2), respectively, and the bounce amounts A and C are calculated.
The widthwise warp amount W defined by the following equation (3) using
It is designed to calculate F. Furthermore, this warp amount W
The direction of warpage is determined by whether F is positive or negative, and the height of warpage is determined by the magnitude of the absolute value of the amount of warpage WF. A = b−a (1) C = b−c (2)

[Equation 1] In the above formula (3), W is the width dimension of the corrugated board sheet 25, and E is a constant for making the warpage amount dimensionless.

Therefore, according to the corrugated board sheet manufacturing system of the present embodiment, the warp of the corrugated board sheet 25 is automatically corrected, so that the corrugated board sheet 25 can be corrected more accurately and easily without relying on the experience and know-how of the operator. The warp of the corrugated board sheet 25 can be corrected.
Further, here, the degree of warpage is judged in three stages of large, medium and small, but according to this system, the degree of warp can be judged more finely and the warp of the corrugated board sheet 25 can be more accurately determined. Can be corrected.

In this embodiment, the CCD camera 7
Although the warp state determination unit 8 detects the warp state of the corrugated cardboard sheet based on the image information obtained by, the CCD camera (imaging unit) 7 is replaced by the warp state determination unit 8 shown in FIGS.
As shown in FIG. 7, a displacement sensor (displacement amount measuring means) 7A may be used and the warp state determination unit 8 may detect the warp state of the corrugated board sheet based on the measurement information of the displacement sensor 7A.

More specifically, FIG. 11A,
In the example shown in (b), the displacement sensor 7A is
Mounted on the rail 71a extending horizontally along the width direction of the corrugated cardboard sheet 25, the displacement sensor mounting member 72 is mounted on the rail 71a.
It is slidably mounted via a. Further, the displacement sensor mounting member 72a is provided with a driving means (not shown), and the displacement sensor 7A is driven by this driving means, and the operation side corner PA of the corrugated cardboard sheet 25, the driving side corner PC and the sheet center PB. The position is controlled upward, and as shown in FIG. 11C, the vertical displacement amount a ′ from the displacement sensor lens surface to each point PA to PC,
b'and c'can be detected.

Then, in the warp state determination section 8, vertical jump amounts A and C from the floor plane of the corners PA and PB of the corrugated board sheet 25 are calculated as shown in the following equations (4) and (5), respectively. The warp amount WF in the width direction is calculated by the above equation (3). A = b'-a '(4) C = b'-c' (5) In the configuration shown in FIGS. 8 to 11, when the warp state determination unit 8 determines that there is no warp, May automatically store the operating state at this time as the optimum operating state of the current production state. In this case, the warp state OK button 5B is unnecessary, and the warp state determination unit 8 and the CCD camera (imaging unit) 7 [or the displacement sensor (displacement amount measuring unit) 7A] constitute the quality information acquisition unit of the present invention. Become.

(D) Fourth Embodiment Next, a fourth embodiment of the present invention will be described with reference to FIGS. 12 and 13.
Will be explained. The present embodiment is characterized by means for acquiring information about the warped state of the corrugated cardboard sheet 25 as compared with the third embodiment, and instead of the CCD camera (imaging means) 7 and displacement sensor (displacement amount measuring means) 7A. In addition, the content moisture detecting means of the liners 20 and 23 is used. The rest of the configuration is the same as in the third embodiment.

As shown in FIG. 12, the production control device 2 according to the present embodiment detects the temperature T1 of the back liner 20, which is a parameter correlating with the water content of the back liner 20, as the water content detection means. A temperature sensor 40a and a temperature sensor 40b that detects a temperature T2 of the front liner 23, which is a parameter that correlates with the water content of the front liner 23, are provided at the double facer inlets, respectively. Here, one temperature sensor 40a, 40b is arranged at the center of each of the liners 20, 23 in the width direction, and
The warp state determination unit 8 detects the temperatures T1 and T of the liners 20 and 23.
Based on 2, the warp state of the corrugated board sheet 25 in the width direction is determined.

The warp state determination method of the warp state determination unit 8 will be further described with reference to FIG.
First, the levels of the temperatures T1 and T2 of the liners 20 and 23 are respectively judged in three stages of high, normal and low. And
When the combination of the back liner temperature T1 and the front liner temperature T2 is (high, high), (normal, normal) or (low, low), the temperature difference between the back liner 20 and the front liner 23, and thus the inclusion. Since there is no difference in the amount of water, the corrugated cardboard sheet manufactured by laminating the liners 20 and 23 is predicted and determined not to warp (no warp).

The back liner temperature T1 and the front liner temperature T
When the combination with 2 is (low, low) or (high, high), matrix control is performed so that both the back liner temperature T1 and the front liner temperature T2 become normal. In addition, the back liner 20 above the front liner 23
When the temperature is high, that is, when the water content of the front liner 23 below the back liner 20 is high, it is predicted that the cardboard sheet will be warped (convex on the back liner 20 side).
It is designed to judge. And liners 20, 23
The degree of the warp is predicted / determined according to the absolute value of the temperature difference ΔT. That is, when the back liner temperature T1 is high and the front liner temperature T2 is normal,
When the back liner temperature T1 is high and the front liner temperature T2 is low, the temperature difference ΔT becomes relatively large, so that the degree of warpage is larger than that during the above warpage. When the back liner temperature T1 is normal and the front liner temperature T2 is low, the temperatures of the liners 20 and 23 are low, and therefore the warpage is smaller than that during the warpage and the warpage is small. Make a decision.

On the other hand, when the temperature of the lower front liner 23 is higher than that of the back liner 20, the warp state determination unit 8 predicts / determines that the cardboard sheet is warped (convex to the front liner 23 side). When the front liner temperature T2 is high and the back liner temperature T1 is normal, it is presumed that the warp is occurring, and when the front liner temperature T2 is high and the back liner temperature T1 is low, the temperature difference ΔT is Since the warp is large, it is judged that the warp is large and the front liner temperature T
When 2 is normal and the back liner temperature T1 is low, the temperatures of the liners 20 and 23 are low, so that it is determined that the warp is smaller than the warp during the warp. . The temperature sensors 40a and 40b may be installed at the double facer outlet instead of being installed at the double facer inlet.

Since the corrugated board sheet manufacturing system according to the fourth embodiment of the present invention is configured as described above, the liner 20 before being bonded is particularly provided when the temperature sensors 40a and 40b are installed at the double facer inlet. ，
The warp state of the corrugated cardboard sheet 25 is predicted / determined based on each temperature of 23, and the warp correction control is early performed based on this result. Therefore, the optimum operation state corresponding to the current production state is the optimum operation state storage unit. Even if it is not stored in 5A, there is an advantage that the warp can be suppressed for a short order.

As the moisture content detecting means, instead of the temperature sensors 40a and 40b, moisture sensors that directly detect the moisture content of the liners 20 and 23 are used, and the warped state is detected based on the detection results of these moisture sensors. The determination unit 8 may predict / determine the warp of the corrugated board sheet.

(I) Others The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention. You can For example, in the above-described embodiment, an example in which the present invention is applied to suppress the warp of the corrugated board sheet has been described.
The present invention can also be applied to the suppression of defective bonding of corrugated board sheets. For example, the operator may monitor the bonding state of the corrugated cardboard sheets, and if there is no problem in this bonding state, the operator may input this from the quality information input means (for example, push button). In this case, as the specific control element that affects the bonding state, at least one operating state of the control elements that control the amount of gluing to the core of the single facer and the amount of gluing to the single-stage sheet of the glue machine is the optimum operating state. Will be stored in the optimum operating state storage unit 5A.

[0091]

As described in detail above, according to the corrugated board sheet manufacturing system of the present invention, when the predetermined product state of the manufactured corrugated cardboard sheet satisfies the predetermined quality, the above product is produced each time. The operating state of the specific control element that affects the state is stored and accumulated in the optimal operating state storage means as the optimal operating state of the corresponding production state. If the optimum operation state corresponding to the current production state is stored in the optimum operation state storage means, the specific control element will be automatically controlled to this optimum operation state, so the experience and know-how of the operator There is an effect that it is possible to satisfy a predetermined quality for a predetermined product state of a corrugated board sheet without depending on the above.

[Brief description of drawings]

FIG. 1 is a diagram showing an outline of a corrugated board sheet manufacturing system according to a first embodiment of the present invention.

FIG. 2 is a schematic view showing a configuration of a back liner preheater, a single facer, and a core preheater of a corrugated board sheet manufacturing apparatus.

FIG. 3 is a schematic diagram showing a partial configuration of a single-stage sheet preheater, a front liner preheater, a glue machine, and a double facer of a corrugated board sheet manufacturing apparatus.

FIG. 4 is a schematic diagram showing a configuration of a double facer of the corrugated board sheet manufacturing apparatus.

FIG. 5 is a diagram showing an outline of a corrugated board sheet manufacturing system according to a second embodiment of the present invention.

FIG. 6 is a diagram showing a configuration of a knowledge database according to a second embodiment of the present invention.

FIG. 7 is a flowchart showing a flow of warp correction processing according to the second embodiment of the present invention.

FIG. 8 is a diagram showing an outline of a corrugated board sheet manufacturing system according to a third embodiment of the present invention.

FIG. 9 is a schematic diagram showing a configuration of a stacker of the corrugated board sheet manufacturing apparatus and a configuration of a warpage state information acquisition unit according to the third exemplary embodiment of the present invention.

FIG. 10 is a diagram showing a warpage state information acquisition unit according to a third exemplary embodiment of the present invention, FIG. 10A is a schematic perspective view showing an image of a cardboard sheet taken by a CCD camera (image pickup unit), and FIG. 6A is a schematic diagram for explaining a method of detecting a warped state.

11A and 11B are views showing a modified example of the warpage state information acquisition unit according to the third embodiment of the present invention, FIG. 11A is a schematic side view showing the configuration, and FIG. 11B is a view A2 in FIG. 11A. Part enlarged view, (c) is a schematic perspective view for explaining a method of detecting a warped state.

FIG. 12 is a diagram showing an outline of a corrugated board sheet manufacturing system according to a fourth embodiment of the present invention.

FIG. 13 is a diagram showing a configuration of a warpage state determination unit according to the fourth exemplary embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Corrugated board sheet manufacturing apparatus 2 Production management apparatus 3 Knowledge database 4 Control amount calculation unit 5 Process controller 5A Optimal operating state storage unit (optimal operating state storage means) 5B Warp state OK button (quality information acquisition means, quality information input means) 6 Warp state input unit 7 CCD cameras 7A, 7B to 7D Displacement sensor (displacement amount measuring means) 8 Warp state determination unit 10 Back liner preheater 11 Single facer 12 Middle core preheater 13 Single-stage sheet preheater 14 Front liner preheater 15 Glue machine 16 Double facer 17 Slitter Scorer 18 Cut-off 19 Stacker 20 Back Liner 21 Middle Core 22 Single-Side Sheet 23 Front Liner 24 Corrugated Cardboard Sheet 25 Corrugated Cardboard Sheet (Product) 40a, 40b Temperature Sensor (Moisture Content Detection Means) 41a, 41b Moisture Sensor (Content Moisture Content) Inspection Knowledge means) 61 to 67 Push button 71 Frame 71a Rail 72 CCD camera mounting members 72a and 72b Displacement sensor mounting members 101A and 101B Back liner heating rolls 102A and 102B Winding amount adjusting device 114 Upper roll 116 Gluing device 116b Gluing roll 116c Meter roll 131 Single-stage sheet heating roll 132 Winding amount adjusting device 141 Front liner heating roll 142 Winding amount adjusting device 151 Gluing device 151b Gluing roll 152 Pressure bar device 152a Pressure bar 161A, 161B Shower device 162 Hot plate 163 Pressure belt 164 Pressurizing unit 164a Pressurizing bar 191 Conveyor 192 Stack parts a, b, c, a ', b', c Vertical displacement amount A, C Vertical flip-up amount PA, PB from the floor plane Warpage measurement points WF width direction of the vertical displacement of the C cardboard sheet

Claims (4)

[Claims] 1. An operating state information acquiring unit for acquiring information on an operating state of a corrugated board sheet manufacturing apparatus, a production state information acquiring unit for acquiring information on a production state of the corrugated cardboard sheet manufacturing apparatus, and an operating state information acquiring unit. Control amount calculation means for calculating the control amount of each control element of the corrugated board sheet manufacturing apparatus based on the operating status information acquired by the production status information and the production status information acquired by the production status information acquisition means, Quality information acquisition means for acquiring that the prescribed product state of the corrugated board sheet manufactured by the device satisfies the prescribed quality, and that the prescribed product state of the corrugated cardboard sheet satisfies the prescribed quality. Is obtained by the quality information obtaining means, among the operating state information obtained by the operating state information obtaining means, Optimal operation state information storage means for storing information relating to a specific control element that affects the quality of the product as information relating to the optimal operation state in the production state when the quality information acquisition means performs the input; When the optimum operating state information stored in the state information storage means corresponds to the current production state, a control means for preferentially controlling the specific control element to the optimum operating state is provided. A manufacturing system for corrugated cardboard sheets, which is characterized by being equipped. 2. The quality information acquisition means is constituted by quality information input means for inputting when the operator judges that a predetermined product state of the corrugated cardboard sheet satisfies the predetermined quality. The corrugated board sheet manufacturing system according to claim 1, which is characterized in that: 3. A predetermined product state of the corrugated board sheet is a warped state of the corrugated board sheet, and when it is acquired that the corrugated board sheet is not warped as satisfying the predetermined quality described above, Of the operating state information acquired by the operating state information acquiring means, those relating to the specific control element that affects the warp state of the corrugated cardboard sheet are stored as the optimal operating state information by the optimal operating state information storage means. The corrugated board sheet manufacturing system according to claim 1 or 2, characterized in that: 4. A warp state information acquisition unit for acquiring information about a warp state of a corrugated board sheet manufactured by the corrugated board sheet manufacturing apparatus, and a water content of a back liner or a front liner of control elements of the corrugated board sheet manufacturing apparatus. Further comprising a control element selecting means for selecting at least one of the plurality of specific control elements that affect the warp according to the warp state of the corrugated board sheet and the influence of each control element on the warp of the corrugated board. The control amount calculation means, based on the cardboard sheet warp state information and the operating state information of the cardboard sheet manufacturing apparatus,
When the control amount of the selected specific control element is calculated, and the control means does not correspond to the current production state in the optimum operation state information stored in the optimum operation state information storage means. In the above, the specific control element selected by the control element selection means is controlled by the control amount calculated by the control amount calculation means.
Corrugated board sheet manufacturing system described.