JP2002192636A - Method and apparatus for pasting for single-faced corrugated cardboard production apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize defective paste application generated by a pasting roll rebound phenomenon which is generated by the paper thickness of a paper joining part, when the paper joining part passes between the second stage roll of a single-faced corrugated cardboard production apparatus and the pasting roll. SOLUTION: In steady production by the single-faced corrugated cardboard production apparatus, the pasting roll is pressed toward the second stage roll by the first press force for applying an optimum amount of paste on a corrugating medium by the pasting roll. When the paper joining part passes, it is pressed by the second press force to minimize the pasting roll rebound phenomenon generated by the paper thickness of the paper joining part, while the quality deterioration and breakage or mechanical damage of the corrugating medium are prevented. After the passage of the paper joining part, control to change over to the first press force is done.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to laminating a liner to a stepped core paper which is passed between step portions of a first roll and a second roll having a step formed on an outer peripheral surface. In a single-sided corrugated cardboard manufacturing apparatus that manufactures a single-sided corrugated cardboard sheet, an appropriate amount of glue is applied to the top of the corrugated core paper that has been corrugated after passing through the paper thickness and the spliced portion and the spliced portion of the core paper, The present invention relates to a sizing method and an apparatus for preventing mechanical damage due to a change in paper thickness or passage of a paper splicing portion and deterioration in quality of a core paper.

[0002]

2. Description of the Related Art An apparatus for producing a single-sided corrugated cardboard sheet in which a liner is attached to a corrugated top of a corrugated medium paper has a first-stage roll and a second-stage roll provided with a corrugated step on an outer peripheral surface. For example, a press member such as a press roll is attached to the second-stage roll so that the core paper and the liner are bonded to each other so as to be rotatable while meshing with each other at the step portion. That is, the core paper is supplied between the first roll and the second roll, and a desired corrugated step (flute) is formed when passing between the two rolls. A starch-based paste is applied to the step top formed into a desired waveform by a sizing roll provided in a sizing apparatus. Further, a liner is supplied from the opposite side of the core paper via a preheater or the like, and a single-sided corrugated cardboard sheet is continuously formed by bonding the liner between the pressing member and the second-stage roll while pressing the liner against the step top of the core paper. Is manufactured.

[0003] The gluing apparatus includes a glue pan for storing glue, a glue roll immersed in the glue stored in the glue pan and rotatably disposed, and a periphery of the glue roll in contact with the glue roll. It is composed of a doctor roll and a doctor blade that stir the glue adhered to the surface. Then, the sizing roll is brought close to the second-stage roll and adjusted to a gap corresponding to the thickness of the core paper, and the sizing roll is pressed with a desired pressing force toward the second-stage roll. An appropriate amount of glue is uniformly applied by a gluing roll to the top of the stepped core paper that passes between the two rolls.

[0004]

In the single-sided corrugated cardboard manufacturing apparatus, the core paper having a different paper thickness is passed between the second roll and the glued roll in accordance with the order change. In the case of a thinner paper thickness, the glue is not applied to the step top of the core paper, which causes a defect that the core paper and the liner are not bonded. Further, when the paper thickness is larger than the gap, there is a problem that the core paper is damaged, the core paper is broken, and the like. Therefore, when the paper thickness of the core paper changes due to the order change, it is necessary to adjust the gap between the second-stage roll and the gluing roll according to the paper thickness.

[0005] To adjust the gap between the second-stage roll and the gluing roll, paper thickness data of the core paper is input to a control device connected to the gap adjusting device provided in the gluing device, and based on the data. This is performed by controlling the operation of the gap adjusting device and moving the glued roll close to and away from the second roll. That is, it is necessary for the operator to input data accompanying the order change in advance or to manually input and set the paper thickness data to the control device every time the order is changed, so that the adjustment work is complicated. In addition, when erroneous data is input due to an input error of paper thickness data or the like, as described above, the glue may not be applied to the top of the core paper, or the core paper may be damaged or the core paper may be broken. was there.

In addition, a paper thickness detecting means for detecting the paper thickness of the core paper supplied to the single-sided corrugated cardboard manufacturing apparatus is provided, and the gap adjusting device is operated and controlled by a detection signal from the paper thickness detecting means. The gap between the two-stage roll and the gluing roll is also adjusted, but such means increases the number of parts and is expensive because it instantaneously detects the thickness of the core paper passing at high speed. A detector is also required, and the control thereof is complicated, and there is a problem that the cost increases.

Furthermore, when splicing is performed by a splicer, the spliced portion physically has a thickness of two core papers, and therefore, the spliced portion corresponds to the paper thickness of the core paper being produced. When the spliced portion reaches the engaging portion between the second-stage roll and the sizing roll set at the optimum gap, the spliced portion forcibly passes between the gaps. Applying mechanical load may cause damage. Then, since the paper joining portion forcibly passes between the sizing roll and the second-stage roll, the sizing roll retreats from the second-stage roll. However, since the sizing roll is pressed against the second-stage roll with a desired pressing force, the pressing force causes a rebound phenomenon between the sizing roll and the second-stage roll. Due to this rebound phenomenon, the glued roll may or may not be in contact with the core paper traveling on the outer peripheral surface of the second roll, and the glue may not be applied to the top of the stepped core paper. A non-uniform state of the applied glue occurs. And, depending on the pressing force of the gluing roll, if the pressing force is weak, the rebound phenomenon continues for a long time, and the non-uniform state of the application of the glue becomes several meters.

SUMMARY OF THE INVENTION The present invention has been proposed in view of the problems inherent in the prior art described above, and has been proposed in order to suitably solve the problem. The present invention has an extremely simple structure and is always suitable for the top of the core paper. It is an object of the present invention to provide a method and an apparatus for gluing a single-faced cardboard manufacturing apparatus capable of applying the same glue.

[0009]

A first-stage roll having a corrugated step formed on the outer peripheral surface and a corrugated step meshing with the corrugated step are formed on the outer peripheral surface. A second-stage roll for performing required step-forming on the cored paper to be passed, and laminating the stepped-formed cored paper with a liner at the glued step top portion to form a single-sided cardboard. In the single-sided corrugated cardboard manufacturing apparatus to be manufactured, a sizing roll for applying a paste to the top of the core paper is moved closer to the second-stage roll, and the sizing roll damages the core paper. When the paper splicing section passes between the second-stage roll and the sizing roll during the production, the production is performed by urging with the first urging force for applying the optimal amount of the sizing material. It is higher than the first urging force and minimizes the rebound phenomenon of the sizing roll caused by the thickness of the spliced portion. After the paper splicing section has passed between the second-stage roll and the sizing roll, the sizing roll is urged by the first biasing force. This is a gluing method for a single-sided cardboard manufacturing apparatus.

[0010] A first-stage roll having a corrugated step formed on the outer peripheral surface thereof, and a corrugated step formed on the outer peripheral surface to be meshed with the corrugated step, and a center core passed between the first-stage roll. A single-sided corrugated cardboard manufacturing apparatus comprising a second-stage roll for performing required corrugated molding on paper, and laminating the corrugated core paper with a liner at a glued corrugated top portion to produce a single-sided corrugated cardboard. A biasing means for moving a sizing roll for applying a sizing material to the top of the core paper in proximity to the second-stage roll, and biasing the sizing roll toward the second-stage roll; The sizing roll is urged by a first urging force for applying an optimal amount of sizing material to such an extent that the core paper is not damaged, and during the production, the paper joining portion is When passing between the roll and the gluing roll, the first urging force is higher than the first urging force and depends on the paper thickness of the spliced portion. After the paper splicing section has passed between the second-stage roll and the sizing roll, the sizing roll is urged by a second urging force that minimizes the rebound phenomenon of the sizing roll. And a control means for controlling the urging means so as to be urged by the first urging force.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a gluing method and apparatus for a single-faced corrugated cardboard manufacturing apparatus according to the present invention will be described with reference to the accompanying drawings by way of preferred embodiments.

FIG. 1 is an embodiment schematically showing the configuration of a single-sided cardboard manufacturing apparatus 1 incorporating a gluing apparatus according to the present invention, and intersects the sheet feeding direction on a base 2 fixed to a floor FL. A first-stage roll 4 and a second-stage roll 5 having a desired corrugated step formed on the outer peripheral surface between a pair of main frames 3 erected at predetermined intervals in the width direction are rotatably supported. . There are various arrangements of the first-stage roll 4 and the second-stage roll 5 depending on the concept of the single-sided corrugated cardboard manufacturing apparatus. In the present embodiment, the first-stage roll 4 is located immediately below the rotation center of the second-stage roll 5. A vertically arranged single-sided corrugated cardboard manufacturing apparatus in which the center of rotation is disposed will be described. However, the sizing device of the present invention can be applied irrespective of the arrangement of the rolls.

The outer peripheral surface of the second roll 5 has a first
A laminating member 1 for laminating a core paper 21 and a liner 22 glued to a step top by a gluing device 13 described below, which is formed into a desired waveform by the step roll 4 and the second step roll 5.
9 and 20 are arranged so as to be able to approach and separate freely. The laminating members 19 and 20 are roll-shaped press rolls for pressing and bonding the core paper 21 and the liner 22, and are also formed by pressing along the outer peripheral surface of the second roll 5 and pressing the core paper 21 and the liner 22. There is a belt press device or the like that presses and bonds the core paper 21 and the liner 22 with a shoe member to be joined or a belt wound around a plurality of rotating rolls. In the present invention, at least two smooth rolls 19 and 20 are provided on the outer peripheral surface of the second roll 5 at a desired interval, and the core paper 21 and the liner 2 are arranged.
An example of a single-sided cardboard manufacturing apparatus for bonding members 19 and 20 for bonding 2 will be described. The two smooth rolls 19, 20
Are provided on the outer peripheral surface of the second roll 5 so as to be able to approach and separate from each other. Then, the two smooth rolls 19 and 20 are passed through a core paper 21 and a liner 22 wound around the outer peripheral surface of the second-stage roll 5 according to the paper quality, paper width and production speed of the single-sided corrugated cardboard sheet to be produced. The two flat rolls 19,
The core paper 21 and the liner 22 are brought into desired contact with the outer peripheral surface of the second stage roll 5 between the two smooth rolls 19 and 20 without bringing the outer peripheral surface of the second stage roll 5 into contact with the outer peripheral surface of the second stage roll 5 as much as possible. The core paper 21 and the liner 22 are wound so as to be tensioned and bonded by the action of the tension, or further, one of the smooth rolls is wound around the outer peripheral surface of the second roll 5. And press the other smooth roll to the second
The core paper 21 and the liner 22 are brought into close contact with the outer peripheral surface of the step roll 5 without making contact with the two smooth rolls 1.
This is a device for winding and bonding the outer peripheral surface of the second roll 5 between 9 and 20 so as to apply a desired tension. In this way, the core paper 21 and the liner 22 are stuck to produce a continuous single-sided corrugated cardboard sheet 23. The gluing device of the present invention can be applied regardless of the configuration of each bonding member.

On the upstream side of the meshing section between the first roll 4 and the second roll 5, a preheater 6 for heating the supplied core paper 21 and a preheater 6 for the core paper are provided.
Is provided with an idle roll 7 for winding the core paper 21. Then, the second-stage roll 5 and two smooth rolls 19,
20, a liner preheater 8 for heating the supplied liner 22 and a liner 2 are provided on the liner preheater 8 upstream of the engaging portion of the smoothing roll 19 disposed on the upstream side.
An idle roll 9 for winding the reel 2 is provided.

Next, the gluing device will be described. The gluing device 13 is located downstream of the meshing portion between the first roll 4 and the second roll 5 and upstream of the engaging portion between the second roll 5 and the smooth roll 19. The gluing device 13 includes a glue pan 12 for storing glue, a glue roll 10 dipped in the glue stored in the glue pan 12 and rotatably disposed, and a glue roll 1.
The doctor roll 11 is configured to scrape the glue that comes into contact with the peripheral surface of the sizing roll 10 in a circumferential direction. Rollers 14a and 14b provided at the lower part of the gluing device 13 are configured to slide on the base 2.
5, the gluing device 13 is moved toward and away from the second-stage roll 5. The moving device 15 includes the main frames 3 and 3
A hydraulic or pneumatic actuator, an electric motor, or the like is provided via a bracket 16 on auxiliary frames 17 and 17 fixedly mounted beside the. In this embodiment, a hydraulic or pneumatic actuator will be disclosed and described. And
A connector 18 is attached to the tip of the rod 15 a of the actuator 15.
The gluing device 13 is joined via the. The moving device 15 controls the pressing force of the sizing roll 10 against the second-stage roll by a driving source 25 such as a hydraulic pressure, a solenoid valve 26 for supplying a driving medium of the driving source 25 to the actuator 15, and a control device 24 described later. The sizing device driving unit Z includes a proportional control valve 27 and the like.

The moving device 15 includes the driving source 25
The sizing roll 10 of the sizing device 13 is brought close to the second-stage roll 5 while the drive medium is supplied from the apparatus, and the starch-based paste is properly applied to the top of the stepped core paper 21 by the sizing roll. The core sheet 21 comes into contact with the core paper 21 with a pressing force that is optimal for uniform application by the amount, and even when the paper splicing section Y passes between the second-stage roll 5 and the sizing roll 10, It is controlled by a control device 24 that performs switching control for passing the sheet joining portion Y with a pressing force that minimizes a rebound phenomenon of the gluing device due to a thickness change. Specifically, the control device 24 mainly presses the sizing roll 10 of the sizing device 13 toward the second-stage roll 5 with at least two pressing forces. The first pressing force is, when the single-sided corrugated cardboard manufacturing apparatus 1 is in operation, when the top of the second roll 5 comes into contact with the sizing roll 10 via the core paper 21 and the position of each top, and The position of the sizing roll 10 does not fluctuate due to the difference from the position between the tops (that is, the sizing device 13 does not cause a hunting phenomenon via the sizing roll 10), and the pressing force at that time is medium. The core paper 2 in which the sizing roll 10 is formed into a step with respect to the second step roll without deteriorating the quality of the core paper 21.
This is the minimum pressing force (hereinafter, referred to as the first pressing force) that can apply the paste to No. 1 and is mainly used during the general production operation. Another pressing force is that when the paper splicing portion passes through the engaging portion between the second-stage roll 5 and the sizing roll 10, the gluing device is temporarily retracted from the second-stage roll by the paper thickness of the paper splicing portion. It is a pressing force (hereinafter referred to as a second pressing force) that can be immediately returned to the original gap position. Specifically, the second pressing force is such that the paper splicing portion and the core paper 21 immediately thereafter are not crushed and deteriorated, or a trouble such as paper breakage does not occur. When the core paper 21 scrapes the glue from the outer peripheral surface of the glue roll 10, the core paper 21 The pressing force is such that it does not damage the mesh or the like processed on the outer peripheral surface of the roll 10, but the pressing force is such that the rebound phenomenon is minimized. The control device 24 issues a command to the proportional control valve 27 using the control method described below to control the two pressing forces, and operates the actuator 15 to direct the sizing roll 10 to the second-stage roll 5 via the sizing device 13. Press. That is, the sizing roll 10 is in contact with the core paper 21 in a state of being constantly pressed against the second-stage roll.

Next, switching control of the pressing force will be described. Mill roll stand 2 for supplying core paper 21 to single-sided cardboard manufacturing apparatus 1 for manufacturing single-sided cardboard sheet 23
8 and the core paper 2 supplied from the mill roll stand 28
As shown in FIG. 2, splicers 32 that splice the sheets 1 are arranged on the upstream side of the single-sided cardboard manufacturing apparatus 1. The machine stand 29 is fixed to the floor FL of the mill roll stand 28,
Two sets of chucking arms 30a and 30b are mounted on the machine base 29.
Are provided rotatably. The roll base paper 3 serving as the core paper 21 is provided on each of the chucking arms 30a and 30b.
1a and 31b are respectively loaded. The splicer 32 includes introduction rolls 34a and 34b, a splice head 33 including a paper splicing device (not shown), and guide rolls 35a and 35b.
35c and a storage section composed of dancer rolls 36a, 36b and 36c. A discharge roll 37 is provided at a discharge portion of the splicer 32. The discharge roll 37 is provided with a pulse generator or the like that measures the feeding amount of the core paper 21 fed from the splicer 32 toward the single-sided corrugated cardboard manufacturing apparatus 1. A measuring device 38 is provided. Splicer 32
The distance X between the paper splicing point and the engaging portion of the second-stage roll 5 and the sizing roll 10 of the single-sided cardboard manufacturing apparatus 1 is constant,
It is a dimension that can be grasped by design. And the splicer 32
The amount of the core paper 21 fed from the splicer 32 is measured by a measuring device 38 via a discharge roll 37 provided at the discharge part of the splicer 32. It is always known which part the part Y is currently passing or when it is passing between the second-stage roll 5 and the sizing roll 10. Therefore, the pressing force of the sizing roll 10 on the second-stage roll 5 may be switched when the paper joining portion Y reaches between the second-stage roll 5 and the sizing roll 10 of the single-sided corrugated cardboard manufacturing apparatus 1 or immediately before. . However, since the single-faced corrugated cardboard manufacturing apparatus 1 operates at a speed of 400 meters per minute at a high speed, the paper splicing section Y also advances by 6 meters per second.

Further, the second-stage roll 5
Sizing device 13 for pressing the sizing roll 10 with the optimal pressure
The control unit 24 and the actuator 15 controlled by the control unit also have a mechanical start-up time lag.
Since it is not enough to operate after the paper splicing section Y arrives during the period, the desired position P1 as shown in FIGS.
Roll 2 with respect to the second-stage roll 2 when passing
The controller 24 arbitrarily sets the position at which the actuator 15 is activated by transmitting the switching signal b to the proportional control valve 27 of the gluing device section moving part Z so as to switch the pressing force of 0. Further, immediately after the paper splicing portion Y has passed through the desired position P2 as shown in FIGS. 2 and 3 after passing between the second-stage roll 5 and the sizing roll 10, the pressing force is returned to the original pressing force. Arbitrarily set the position to switch to pressure. Thus, the switching position of the pressing force is set arbitrarily, and the spliced portion Y is
The control is such that the pressing force is switched when passing through the engagement portion of the glue roll 10 with the adhesive.

Next, the use according to the present invention will be described with reference to FIGS. 4 and 5 to 9. The core paper 21 fed from the mill roll stand 28 via the splicer 32
Between the first-stage roll 4 and the second-stage roll 5 and the second-stage roll 5 and the smoothing rolls 19 and 20 of the single-sided cardboard manufacturing apparatus 1.
After passing through the inside of the single-sided cardboard manufacturing apparatus 1 through
The single-sided corrugated cardboard manufacturing apparatus 1 is a main controller 50 of a corrugator.
When a start signal of the machine is received from the controller 15, the drive medium flows through the actuator 15 which moves the gluing device 13 forward and backward (approach and separation). A start signal a for operating the solenoid valve 26 is transmitted. At this time, the force for advancing the sizing device 13 toward the second-stage roll 5 is not particularly limited, and may be any force. 10
The first pressing force (F
1) may be used. Then, the sizing device 13 contacts the core paper 21 wound around the outer peripheral surface of the second-stage roll 5 while maintaining the pressing force (F1) advanced toward the second-stage roll 5, and Maintain state. Subsequently, when the single-faced corrugated cardboard manufacturing apparatus 1 enters a steady operation, the sizing roll 10 presses the second-stage roll 5 with the first pressing force (F1) while the first-stage roll 4 and the second-stage The step is formed into a corrugated shape by the roll 5, and paste is applied to the step top of the core paper 21 traveling on the outer peripheral surface of the second step roll 5.

Subsequently, when splicing of the core paper 21 is performed by the splicer 32, the main controller 50 of the corrugator controls the pulse generator 38 of the splicer 32 and the gluing device 13 of the single-sided corrugated cardboard manufacturing apparatus 1. A splice signal is transmitted to 24. When the pulse signal from the main control device 50 is received by the pulse generator 38 and the control device 24, the pulse generator 38 counts the feeding amount of the core paper 21 fed from the splicer 32 and measures the traveling position of the paper splicing section Y. At the same time, the measurement information is transmitted to the control device 24. Then, the running position of the spliced portion Y is continuously measured, and the spliced portion Y approaches the pressing force switching position P1 as shown in FIG. 5 and passes through the pressing force switching position P1 as shown in FIG. Then, the control device 24 issues a switching signal b to the proportional control valve 27 of the gluing device driving section Z. When the proportional control valve 27 receives the switching signal b, the actuator 15 presses the sizing device 13 toward the second-stage roll to apply the first pressing force (F1) pressing the sizing roll 10 to the paper. When the joining portion passes between the second-stage roll 5 and the sizing roll 10, the sizing device 13 sets the second-stage roll 5 based on the thickness of the sheet joining portion Y.
The second pressing force (F2) is changed to the second pressing force (F2) which can temporarily return to the original gap position, though it temporarily retreats from the first position.

Then, while the second pressing force (F2) is maintained, the sheet joining portion Y is connected to the first-stage roll 4 and the second-stage roll 5
And between the second-stage roll 5 and the sizing roll 10 as shown in FIG. The paper splicing section Y is the second roll 5
Immediately after passing between the sizing roll 10 and the sizing roll 10,
Is temporarily retracted by the sheet thickness of the sheet joining portion Y, but immediately returns to the original position. When the gluing roll 10 is retracted from the second roll 5, the glue is not applied to the top of the step-formed core paper traveling on the outer peripheral surface of the second roll 5 temporarily, or the amount of glue is not applied. Although a small area is generated, the retreat of the sizing roll 10 with respect to the second-stage roll 5 is temporary, and immediately returns to the original position. It falls within the range of the defective paper spliced portion cut and removed by a deflector (not shown) in the downstream process.

The pulse generator 38 continuously measures the feed amount of the base paper and transmits the measurement result to the control device 24 to track the position of the paper splicing section Y. Then, as shown in FIG. 8, the paper splicing portion Y runs on the outer peripheral surface of the second roll 5, passes through the first smooth roll 19 and the second smooth roll 20, and pushes the first pressing roll as shown in FIG. 9. Position P to return to pressure (F1)
After 2 passes, the control device 24 transmits a switching signal to the proportional control valve 27 of the glue device driving section Z, and the actuator 15
Roll 5 of the sizing roll 10 of the sizing device 13
Is switched to the first pressing force (F1).

As described above, the single-sided corrugated cardboard manufacturing apparatus 1
When the regular operation is performed, the sizing roll 10 is in the second position.
Pressing the step roll 5 with a minimum pressing force for applying glue to the step top of the step-formed core paper traveling on the outer peripheral surface of the second step roll 5, that is, a so-called first pressing force (F1). When the spliced portion Y spliced by the splicer 32 passes between the second roll 5 and the sizing roll 10 of the single-sided corrugated cardboard manufacturing apparatus 1, the second roll 5 depends on the thickness of the spliced portion Y. Is switched back so as to be pressed by a pressing force capable of immediately returning to the original gap position, that is, a so-called second pressing force. In this manner, during steady operation, sufficient glue is applied to the top of the step-formed core paper that travels on the outer peripheral surface of the second roll 5 and is damaged by the pressing force of the gluing roll 10. Nothing. When the spliced portion Y passes between the second roll 5 and the sizing roll 10, the top of the corrugated core paper is pressed to the extent that the quality of the product is not impaired. Although the sizing roll 10 temporarily retreats from the second-stage roll 5 due to the paper pressure of Y, the sizing is not applied to the top of the stepped core paper or the sizing is not sufficiently performed. In a state where the defective coating area is extremely small, the defective coating area falls within a range where the deflector (not shown) in the downstream process cuts and removes the defective paper splicing portion.

In this way, while the corrugator and the single-sided corrugated board manufacturing machine 1 are operating, the splicer 32 performs the splicing, and the paper splicing portion Y is connected to the second roll 5 of the single-sided corrugated board manufacturing apparatus 1 by the glue. When passing between the attaching rolls 10, the pressing force of the sizing roll 10 against the second-stage roll 5 is repeatedly controlled so as to be switched. Then, when the production in the corrugator is completed, the main controller 50 of the corrugator issues a machine stop signal to the controller 24, and the controller 24 contracts the cylinder rod 15a of the actuator 15 via the gluing device driving section Z, The sizing device 15 is retracted to separate the sizing roll 10 from the second-stage roll 5, and the machine stops.

The switching of the pressing force in the above-described embodiment is performed by changing the running position of the paper splicing section Y by measuring the feeding amount simultaneously with the splicing in the splicer 32 by the pulse generator 38 provided in the splicer 32. The running position of Y is tracked, and control is performed so that each pressing force is switched when reaching the pressing force switching positions P1 and P2. However, this pressing force switching control is not necessarily limited to this. The paper joint as shown in FIG. 10 may be detected by a sensor or the like to control the pressing force. More specifically, detectors 39 and 40 for detecting the spliced portion Y are provided at positions corresponding to the pressing force switching positions P1 and P2 in the above-described embodiment. The detectors 39 and 40 may be of any type as long as they can detect the paper splicing part Y. One example is that the paper splicing part is artificially or mechanically detected by the paper splicing part such as a black label or silver paper. A member is provided, a means and a detector for detecting the member to be detected, a means and a detector for detecting a seam of the paper splicing portion, or a roller running on the both sides of the running core paper, and a roller is provided on each side. Various detecting means such as a means for detecting a gap change or a pressure change of the rollers disposed on both sides of the core paper due to a change in paper thickness when the paper spliced portion passes between the rollers while being sandwiched by both rollers. And a detector, and any detection means and detector may be used.

When the spliced portion Y is detected by these detecting means and the detector, a detection signal is transmitted to the control device 24 and the gluing device for the second-stage roll 5 is controlled in the same manner as the control according to the above-described embodiment. The pressing force switching control of the thirteen gluing rolls 10 is performed. Switching control of the pressing force accompanying the passage of the paper joining portion Y at each of the pressing force switching positions P1 and P2, and the action of applying the glue to the step-formed core paper running on the outer peripheral surface of the second-stage roll by each pressing force. Since these are the same as those in the above-described embodiment, detailed description thereof will be omitted.

Since the pressing force and the pressing force switching control as described above are performed, the sizing roll 10 is always
Is in contact with the core paper while being pressed toward
When the gluing device temporarily retreats from the second roll due to the thickness of the paper splicing portion when passing through the engaging portion between the step roll 5 and the gluing roll 10, the pressing device can immediately return to the original gap position. The sizing roll 10 is pressed by the pressure (F2), and immediately thereafter, the sizing roll 10 returns to the optimum pressing force (F1) for applying the sizing to the core paper 21, and the sizing roll 10 comes into contact with the core paper 21. Even if the paper thickness changes, the core paper 21 is crushed and the quality is degraded,
Alternatively, a trouble such that the glue is not applied to the top of the core paper 21 does not occur.

The first pressing force F1, which is applied by the sizing roll 10 toward the second-stage roll 5 when applying glue to the top of the step of the core paper 21, is changed when the order is changed. The pressing force may change between the upstream side and the downstream side of the paper joining portion Y. That is, the paper quality, the paper width, the paper basis weight, the operation speed, and the like of the core paper 21 may change between the upstream side and the downstream side of the paper splicing section due to the order change. Therefore, the production conditions may be different before and after the order change with the sheet joining portion Y interposed therebetween. Along with this, the first pressing force F1 of the gluing roll 10 against the second-stage roll 5 also needs to be changed according to the production of the core paper 21 and the production conditions. The first pressing force F1 that the sizing roll 10 presses toward the second-stage roll 5 when applying the glue is different between the upstream side and the downstream side across the paper joining portion Y when the order is changed. Control is performed so that the pressing force changes. Therefore, the first pressing force F1 that the gluing roll 10 presses toward the second-stage roll 5 when applying glue to the top of the step of the core paper 21 depends on the paper quality, paper width, and paper basis of the core paper 21. They do not always match depending on the amount and the production conditions.

[0029]

FIG. 11 is a view showing another embodiment. In the above-described embodiment, the core paper 2
1 and the liner 22 are supplied and production starts,
The gluing device 13 advances toward the second roll 5 and stops at a position where the glue 13 is pressed against the second roll 5 with a pressing force (F1) for applying an optimal amount of glue to the top of the core paper 21, In the subsequent production, when the core paper 21 is spliced and the spliced portion Y reaches a predetermined position, the pressure is switched from the first pressing force (F1) to the second pressing force (F2). In the embodiment shown in FIG. 11, the core paper 21 and the liner 22 are supplied to the single-sided corrugated cardboard sheet manufacturing apparatus 1 for production, and the gluing apparatus 13 is
The paper advances toward the step roll 5 and the core paper 2
1 is positioned at a position equal to or slightly smaller than the thickness of the core paper 21 of the order to be produced, and the core paper 2 is positioned at that position.
1 is pressed against the second-stage roll 5 with a pressing force (F1) for applying an optimal amount of glue to the core paper 2 in the subsequent production.
1 is switched from the first pressing force (F1) to the second pressing force (F2) when the spliced portion Y reaches a predetermined position.

More specifically, in a region where the sizing device 13 of the single-sided corrugated cardboard manufacturing apparatus 1 advances and retreats toward the second-stage roll 5, the sizing roll 10 The pedestal 43 is fixed to the frames 2 and 2 of the single-sided corrugated cardboard manufacturing apparatus 1 at a position where the base 43 is in contact with the direction in which the gluing apparatus 13 advances toward the second-stage roll 5. The eccentric cam 42 is rotatably supported by the driving device 41 provided in the single-sided corrugated cardboard manufacturing apparatus 1 in a state of being in contact with the pedestal 43. The drive unit 41 obtains information from the main control unit 50 of the corrugator on various conditions such as, for example, the production speed of the single-sided cardboard manufacturing apparatus 1, the paper quality of the core, the paper width, and the paper thickness, which the single-sided cardboard manufacturing apparatus 1 produces. The sizing device 13 is driven by a command from the control device 24 of the sizing device 13, and the sizing device 13 is moved to the second tier so that the sizing roll 10 can apply the optimum glue to the second-stage roll 5 via the core paper 21. Roll 5
The sizing device 13 at that position.
And the eccentric cam 42 is rotated and positioned so that the eccentric cam 42 abuts and the gluing device 13 is positioned. Generally, the eccentric cam 42 is set so that the gap between the second-stage roll 5 and the gluing roll 10 is the same as or slightly smaller than the thickness of the core paper 21 of the order to be produced. I do. Although this gap is a gap value such that the core paper 21 is crushed by the gluing roll 10, the pressing force at this time is
The pressing force is such that the quality of the core paper 21 is not degraded. Therefore, the elastic force of the core paper 21 results in the same gap as the paper thickness of the core paper 21.

As described above, the positioning position of the gluing device 13 with respect to the second-stage roll 5 and the second-stage roll 5 via the core paper 21 are determined in advance according to various conditions under which the single-sided corrugated cardboard manufacturing device 1 performs production. The sizing device of the present invention can also be suitably implemented in a means for positioning the contact position of the sizing roll 10 in contact. That is, when the single-sided corrugated board manufacturing apparatus 1 starts production, the main control device 50 starts the production with the core paper 21 and the liner 22 supplied to the single-sided corrugated board manufacturing apparatus 1 and the operation preparation is completed. The control device 24 of the gluing device 13 obtains various information, and the drive device 41 is driven according to the production information, and the eccentric cam 42
Is rotated to position the sizing device 13, and the sizing roll 10 abuts on the second-stage roll 5 via the core paper 21. Then, the core paper 21 is placed on the second roll 5 at that position.
The production is started by pressing with a pressing force (F1) for applying the optimal amount of glue to the top of the step of the core paper 21 via the core paper 21. In the subsequent production, the core paper 21 is spliced, and When a predetermined position is reached, the pressure is switched from the first pressing force (F1) to the second pressing force (F2). The switching control and means of the pressing force, the switching position and the timing are the same as those in the above-described embodiment, and the detailed description here will be omitted.

In this alternative embodiment, when various conditions such as the production speed of the single-sided corrugated cardboard manufacturing apparatus 1, the paper quality of the core paper, the paper width, and the paper thickness are changed in accordance with the order change, the main controller of the corrugator is changed. 50 transmits the information to the control device 24 of the gluing device 13, and based on the information, the driving device 4
1 operates to rotate the eccentric cam 42 to move the sizing device 13 forward or backward with respect to the second-stage roll 5 so that the sizing roll 10 is optimally adjusted to the top of the stepped medium paper 21. Is positioned to apply the glue.

[0033]

As described above, according to the gluing apparatus of the single-sided corrugated cardboard manufacturing apparatus according to the present invention, even if the thickness of the core paper changes due to the order change, the glue is applied to the second roll. Since the roll is always pressed with the optimum pressing force and the glued roll is in contact with the core paper, even if the core paper thinner than the previously passed Since the advancing to the position corresponding to the thickness of the core paper, the paste is not applied to the step top portion, and the defect that the core paper and the liner are not bonded does not occur. Further, even if the core paper thicker than the core paper that has been passed through is passed, the glued roll always presses the second-stage roll with the optimum pressing force. Because it retreats to a position corresponding to the thickness of the core paper,
It does not cause damage to the core paper or breakage of the core paper.

Therefore, it is no longer necessary to adjust the gap between the second-stage roll and the gluing roll in accordance with the change in the thickness of the core paper, which has been conventionally performed in accordance with the order change. For this reason, the operation of adjusting the gap between the second-stage roll and the sizing roll by the operator is also eliminated, and the operator is released from troublesome gap adjustment and the burden is reduced. In addition, human error was eliminated by eliminating the operator's intervention.

Further, as described above, since the gap between the second-stage roll and the sizing roll is not adjusted, the paper-thickness detecting means and equipment for detecting the thickness of the core paper supplied to the single-sided corrugated cardboard manufacturing apparatus are required. There is no need to dispose them, and complicated control can be eliminated and costs can be reduced.

Further, since the spliced portion physically has a thickness of two core papers, the second-stage roll set at an optimum gap according to the paper thickness of the core paper being produced. When the spliced portion reaches the engaging portion of the sizing roll, the spliced portion forcibly passes through the gap, so that a mechanical load is applied to the gap adjusting device of the sizing device, which may cause damage. However, the pressing force is switched only when the paper splicing section passes, and after the paper splicing section passes, the optimal pressing force to apply the glue to the top of the cored paper where the sizing roll is stepped. In this way, it is possible to eliminate defects that occur when glue is not applied to the core paper, damage to the core paper due to excessive pressing force applied to the core paper, breakage of the core paper, etc. In addition, the mechanical damage caused by the mechanical load caused by the abrupt paper thickness change has been eliminated.

[Brief description of the drawings]

FIG. 1 is a sectional side view showing a preferred embodiment of a sizing apparatus in a single-sided cardboard manufacturing apparatus of the present invention.

FIG. 2 is an explanatory diagram showing tracking of a spliced portion until the spliced portion reaches a single-sided cardboard manufacturing apparatus after the spliced portion is spliced.

FIG. 3 is an explanatory diagram showing a position at which a pressing force is switched when a paper joining portion reaches a single-sided cardboard manufacturing apparatus.

FIG. 4 is a control diagram illustrating the pressing force switching control of the present invention.

FIG. 5 is an operation diagram immediately before the paper splicing section reaches an inlet-side pressing force switching position of the single-sided cardboard manufacturing apparatus.

FIG. 6 is an operation view illustrating a state in which the paper splicing portion has passed through an inlet-side pressing force switching position of the single-sided cardboard manufacturing apparatus.

FIG. 7 is an operation view showing a state where a paper splicing portion reaches between a second-stage roll and a sizing roll.

FIG. 8 is an operation diagram immediately before the paper splicing section reaches an outlet-side pressing force switching position of the single-sided cardboard manufacturing apparatus.

FIG. 9 is an operation view illustrating a state in which the paper splicing portion has passed through an outlet-side pressing force switching position of the single-sided cardboard manufacturing apparatus.

FIG. 10 is a diagram illustrating another unit of the paper splicing unit detecting unit at the pressing force switching position.

FIG. 11 is a side view showing an embodiment using a sizing device of the present invention by a positioning device according to another embodiment of a sizing device for a second roll.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Single facer 4 1st stage roll 5 2nd stage roll 10 Glue roll 11 Doctor roll 13 Glue device 15 Actuator 21 Core paper 22 Liner 23 One side corrugated cardboard sheet 24 Control device 25 Solenoid valve 26 Proportional control valve 27 Drive source 28 Mill roll stand 32 Splicer 38 Pulse generator 39 Inlet-side pressing force switching position 40 Outlet-side pressing force switching position 41 Drive unit 42 Eccentric cam 50 Main control unit Y Paper splicing unit Z Gluing device control unit

Claims (7)

[Claims] A first roll (4) having a corrugated step formed on the outer peripheral surface, and a corrugated step engaging with the corrugated step (5) are formed on the outer peripheral surface. ) And a second-stage roll (5) for performing the required step-forming on the core paper (21) passed between the core paper (21) and the step-formed core paper (21). In a single-sided corrugated cardboard manufacturing apparatus for manufacturing a single-sided corrugated cardboard by laminating a liner (22) at a portion of the corrugated top, a sizing roll (10) for applying a paste to the corrugated top of the core paper (21)
Is moved closer to the second-stage roll (5), and the sizing roll (10) is coated with an optimal amount of sizing material without damaging the core paper (21). The production is performed by energizing with the force (F1), and during the production, the paper splicing section (Y) is
The first urging force when passing between the
(F1), which is urged by a second urging force (F2) that minimizes the rebound phenomenon of the sizing roll (10) caused by the sheet thickness of the spliced portion (Y), Y) is the second stage roll (5)
And after passing between the sizing roll (10), the sizing roll (10)
Is urged by the first urging force (F1). 2. The first and second urging forces (F1, F2) of the sizing roll (10) with respect to the second-stage roll (5) are paper width, paper thickness,
2. The method for gluing single-faced corrugated cardboard according to claim 1, wherein the glue is varied depending on conditions such as paper basis weight, operating speed, humidity, and temperature. 3. A first-stage roll (4) having a corrugated step formed on the outer peripheral surface, and a corrugated step which meshes with the corrugated step (5) is formed on the outer peripheral surface. ) And a second-stage roll (5) for performing the required step-forming on the core paper (21) passed between the core paper (21) and the step-formed core paper (21). In a single-sided corrugated cardboard manufacturing apparatus for manufacturing a single-sided corrugated cardboard by laminating a liner (22) at a portion of the corrugated top, a sizing roll (10) for applying a paste to the corrugated top of the core paper (21)
Urging means (15) for moving the sizing roll (10) closer to the second-stage roll (5) and urging the sizing roll (10) toward the second-stage roll (5); ) Is urged by a first urging force (F1) for applying an optimal amount of glue to the extent that the core paper (21) is not damaged, and during the production, the paper splicing section (Y ) Is higher than the first urging force (F1) when passing between the second roll (5) and the gluing roll (10), The second roll (10) is urged with a second urging force (F2) for minimizing the rebound phenomenon of the nip roll (10).
After passing between the step roll (5) and the sizing roll (10), the urging means (15) is controlled so as to urge the sizing roll (10) with the first urging force (F1). A gluing device for a single-sided corrugated cardboard manufacturing apparatus, comprising: When splicing is performed by the splicer (32), the flow length measuring means (38) of the splicer (32) measures the amount of the core paper (21) fed from the splicer (32), The control means (15) for controlling the urging means (15) with the measurement result
According to the measurement result, the paper joining portion (Y) is located at a desired position (P1) on the upstream side of the engaging portion between the second-stage roll (5) and the gluing roll (10).
When the sizing roller (10) reaches the first urging force (F
1), and is urged by a second urging force (F2) that minimizes the rebound phenomenon of the sizing roll (10) caused by the paper thickness of the spliced portion (Y). ) Is the second-stage roll (5)
And a desired position (F) on the downstream side of the engagement portion of the sizing roll (10).
When the sizing roll (10) reaches the first urging force (F
Control means (1) for controlling the urging means (15) so as to urge in (1)
4. A gluing apparatus for a single-sided corrugated cardboard manufacturing apparatus according to claim 3, comprising: 5). 5. The second-stage roll (5) and the sizing roll
A first detecting means (39) for detecting the spliced portion (Y) spliced by the splicer (32) upstream of the engaging portion of (10); A second detecting means (40) for detecting the spliced portion (Y) spliced by the splicer (32) downstream of the engaging portion of the attaching roll (10); Is produced by applying a first urging force (F1) for applying an optimal amount of paste to the core paper (21) so as not to damage the core paper (21). (39)
Detects the paper joining portion (Y), the sizing roll (10) is higher than the first urging force (F1), and the sizing roll (10) generated by the paper thickness of the paper joining portion (Y). ) Is urged by a second urging force (F2) for minimizing the rebound phenomenon of the second detecting means (4).
Control means (15) for controlling the urging means (15) so as to urge the sizing roll (10) with the first urging force (F1) when the sheet joining portion (Y) is detected by the (0). 4. A gluing apparatus for a single-sided corrugated cardboard manufacturing apparatus according to claim 3, comprising: 6. The sizing roll (10) is replaced with a second-stage roll (5).
When moving to the position close to the glue roll (10) and the second roll
(5) a gap adjusting means (41, 42) for setting a desired gap according to conditions of conditions such as paper width, paper thickness, paper basis weight, operating speed, humidity, and temperature of the core paper (21) to be produced. A gluing apparatus for a single-sided corrugated cardboard manufacturing apparatus according to claim 3, wherein 43) is provided. 7. The first and second urging forces (F1, F2) of the sizing roll (10) with respect to the second-stage roll (5) are paper width, paper thickness,
7. A gluing apparatus for a single-sided corrugated cardboard manufacturing apparatus according to claim 3, wherein said apparatus is variable depending on conditions such as paper basis weight, operating speed, humidity, and temperature.