JP2004155022A - Pasting device for single facer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately supply all of paste to a corrugating medium without wasting leaked paste in the pasting device for a single facer. <P>SOLUTION: The positions of paste dams 205 and 206 are detected by paste dam position detecting means 209 and 219, and the leak width of the paste leaked to the outside of paste dams 205 and 206 on a pasting roll 202 is detected by paste leak width detecting means 212 and 213. Then, the deviation between the actual paste exhaust position and the target paste exhaust position on the pasting roll 202 to be calculated from the positions of the paste dams and the paste leak width is operated, and moving means 208 and 218 for moving the paste dams 205 and 206 in the direction of machine width are controlled in the direction eliminating the deviation. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technology for gluing a single facer, and more particularly, to a technology for adjusting the position of a glue dam in consideration of glue leakage from the glue dam.
[0002]
[Prior art]
In the single facer, a single-stage corrugated cardboard (single-stage sheet) is produced by laminating a liner on a core that has been stepped by a pair of upper and lower step rolls. Glue is used for bonding the core and the liner, and the single facer is provided with a gluing device as a device for supplying this glue.
[0003]
The gluing device is usually a glue pool for storing glue, a gluing roll for gluing glue to the top of the core, a meter roll arranged in parallel with the gluing roll to adjust the amount of gluing to the gluing roll, and It has two glue dams. A part of the outer circumference of the glue roll is immersed in the glue inside the glue pool, and the glue dam regulates the width of glue to the glue roll by blocking the glue in the glue pool in the machine width direction. .
[0004]
The glue width of the glue roll is important for the quality control of the single-stage sheet to be produced.If the glue width is too large with respect to the width of the core, excess glue will adhere to the roll and become dirty. Or glue balls. Such dirt and glue balls cause a defect in the step formation of the core and a machine trouble. The glue dam is slidable in the machine width direction while being in contact with the glue roll and the meter roll. By changing the position of the glue dam, the adhesive width of the glue roll can be adjusted.
[0005]
However, in reality, the glue break position (boundary position of the glue adhesion area) on the glue roll does not coincide with the glue dam installation position, and the glue spreads outside the glue dam installation position and glue adheres. May be. This is because it is difficult to bring the glue dam and the glue roll or the glue dam and the meter roll into close contact with each other, and the glue leaks out from a slight gap. The surface of the gluing roll is carved with a mesh for improving the adhesion of the glue, and the gap formed by the mesh also causes the glue to leak from the glue dam. Also, the contact surface of the glue dam with the glue roll or meter roll gradually wears as it is used, and the adhesiveness decreases, so that the amount of glue leak increases with use.
[0006]
For this reason, in the conventional gluing device, even if the glue leaks from the glue dam, the glue leaking from the glue dam is suctioned and removed by a suction device so that an appropriate gluing width to the core can be obtained ( For example, Japanese Unexamined Patent Application Publication No. 2000-163873 and a device that removes glue leaking from a glue dam by washing with a water jetting device (for example, Japanese Unexamined Patent Application Publication No. 2005-163873) have been proposed.
[0007]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 10-29251 [Patent Document 2]
JP-A-10-156975
[Problems to be solved by the invention]
However, it is difficult to completely remove the glue leaking from the glue dam by suction or washing with water, and the removed glue becomes waste glue. That is, in the techniques described in Patent Literatures 1 and 2, there is a risk that glue that cannot be completely removed may adhere to the step roll, and the waste of glue consumption due to glue leakage has not been solved yet.
[0009]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a single-facer gluing device capable of accurately supplying all the glue to the core without wasting leaked glue. With the goal.
[0010]
[Means for Solving the Problems]
As a means for achieving the above object, the single-facer gluing apparatus of the present invention detects the position of the glue dam with the glue dam position detecting means, and the outside of the glue dam on the glue roll by the glue leak width detecting means. The glue leak position is detected by the glue break position calculating means, and the glue dam position and the glue leak width are used to calculate the glue break position on the gluing roll (the boundary position between the glue adhesion area and the non-adhesion area). I did it. Then, the control means for controlling the moving means for moving the glue dam in the machine width direction calculates the shift between the glue break position calculated by the glue break position calculating means and the target glue break position, and eliminates the shift. The moving means is controlled in the direction of movement.
[0011]
According to such a means, it is possible to always match the glue roll position on the gluing roll with a target glue break position, for example, the paper end position of the core, regardless of the degree of leakage of the glue from the glue dam. Yes, all glue is accurately supplied to the core without wasting leaked glue, suppressing the occurrence of dirt and defective products due to excess glue sticking out of the core, paper consumption and glue consumption Waste can be reduced.
[0012]
It is also preferable to perform feedforward control before the start of operation in addition to the above-described feedback control of the glue dam position after the start of the operation. First, the glue leak width on the glue roll is stored in advance in the glue leak width storage unit. Prior to the start of the operation, the initial position of the glue dam is set by the initial position setting means based on the target glue break position for the current job and the glue leak width stored in the glue leak width storage means, and is moved by the control means. By controlling the means, the position of the glue dam is preset at the initial position set by the initial position setting means. According to this, in the feedback control after the start of the operation, the position of the glue dam can be adjusted to an appropriate position at an early stage, and the waste of the paper consumption and the glue consumption can be further reduced.
[0013]
As the glue leak width detecting means, a gloss sensor for detecting the gloss of the glue leaking from the glue dam can be used. It is also preferable to use a camera (imaging device) such as a CCD camera as the glue leak width detecting means. The camera is arranged so as to face a contact portion between the glue dam and the glue roll and the meter roll, and a captured image of the camera is subjected to image processing by the image processing means to detect a leakage width of the glue on the glue roll or the meter roll. In the case of a camera having a wide viewing angle, the image at the end of the viewing field is distorted. Therefore, it is more preferable that the image processing means has a function of correcting the distortion of the image captured by the camera.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(A) First Embodiment FIG. 1 is a side view showing the entire configuration of a single facer provided with a gluing device according to a first embodiment of the present invention.
[0015]
As shown in FIG. 1, the single facer 11 abuts on a pressure belt 113 wound around a belt roll 111 and a tension roll 112 in a pressurized state with the pressure belt 113 having a wavy surface. And a lower roll 115 having a corrugated surface and meshing with the upper roll 114. The liner 20, which is one of the two web materials bonded by the single facer 11, is wound on the liner preheating roll 117 and preheated, and then guided by the belt roll 111 to be heated. It is transported together with the pressure belt 113 to the nip between the pressure belt 113 and the upper roll 114. On the other hand, the core 21, which is another web material, is wrapped around the core preheating roll 118, is given a preheat, and is stepped at a meshing portion between the upper roll 114 and the lower roll 115. It is guided by the roll 114 and transported to the nip between the pressure belt 113 and the upper roll 114.
[0016]
A gluing device main body 200 is arranged near the upper roll 114. Here, FIG. 2 is a side view showing the configuration of the gluing apparatus according to the present embodiment, and FIG. 3 is a plan view thereof. Hereinafter, the configuration of the gluing device according to the present embodiment will be described with reference to FIGS. 2 and 3.
The gluing apparatus main body 200 is provided with a glue reservoir 201 storing glue and a rotating glue roll 202. The outer peripheral surface of the gluing roll 202 comes into contact with the top of the step of the core 21 which is stepped and conveyed by the upper roller 114, and a part of the outer peripheral surface is immersed in the glue stored in the glue reservoir 201. I have. The glue inside the glue roll 201 is taken out of the glue roll 201 by the rotation of the glue roll 202, and the glue attached to the outer peripheral surface of the glue roll 202 is supplied to each top of the core 21. The amount of glue adhered to the outer peripheral surface of the glue roll 202 is adjusted by a meter roll (doctor roll) 203. The meter roll 203 is provided in parallel with the gluing roll 202 and rotates in the opposite direction to the glue roll 202. The glue transferred from the gluing roll 202 to the meter roll 203 is scraped off from the surface of the meter roll 203 by the scraper 204. The core 21 glued to the top of the step by the gluing roll 202 is then bonded to the liner 20 at the nip between the pressure belt 113 and the upper roll 114. Thereby, the one-stage sheet 22 is formed.
[0017]
The left and right side walls of the glue reservoir 201 are constituted by two glue dams 205 and 206. The glue dams 205 and 206 are in contact with the outer peripheral surface of the glue roll 202 and the outer peripheral surface of the meter roll 203. The left and right glue dams 205 and 206 are attached to screw shafts 207 and 217 provided in parallel with the gluing roll 202, respectively. Motors 208 and 218 are connected to ends of the screw shafts 207 and 217, respectively. The position in the machine width direction of each glue dam 205, 206 is determined by the number of rotations of the corresponding screw shaft 207, 217, that is, the number of rotations of the motors 208, 218. Encoders 209 and 219 are mounted respectively. The encoders 209 and 219 function as glue dam position detecting means for detecting the positions of the glue dams 205 and 206 in the machine width direction.
[0018]
Further, CCD cameras 212 and 213 are attached to the outer surfaces of the glue dams 205 and 206, respectively. Each of the CCD cameras 212 and 213 is attached to a contact portion (boundary portion) between the corresponding glue dam 205 or 206 and the glue roll 202 or meter roll 203.
Furthermore, the gluing device according to the present embodiment includes a controller 210 separately from the gluing device main body 200 described above. The signals of the encoders 209 and 219 and the captured images of the CCD cameras 212 and 213 are transmitted to the controller 210. The controller 210 has a function as a control unit that controls the rotation of each of the motors 208 and 218 based on the captured images of the CCD cameras 212 and 213 and the rotation speed signals from the encoders 209 and 219. FIG. 4 is a flowchart showing the function of the controller 210. Hereinafter, the position adjustment control of the glue dams 205 and 206 by the controller 210 will be described with reference to the explanatory diagram of FIG.
[0019]
First, the controller 210 fetches data relating to the position of the core 21 in the machine width direction from the production management device 2 (step A10), and calculates both paper end positions of the core 21 from the acquired data to obtain a target glue-off position. (Step A20). The data relating to the position in the machine width direction is, for example, the paper width of the core 21, the expansion and contraction rate for each paper type with respect to the moisture and the temperature, the moisture percentage and the temperature of the core 21 immediately before gluing.
[0020]
Next, the controller 210 reads out the adhesive leakage width measured in the previous job from the internal storage device (hard disk, RAM, etc.) (Step A30). The measurement of the glue leakage width will be described later. Then, the controller 210 rotates the motors 208 and 218 to move the glue dams 205 and 206 to a position shifted inward by the previous glue leak width from the target glue breaking position, and presets the glue dams as initial positions (step A40).
[0021]
In this way, by presetting the initial positions of the glue dams 205 and 206 before the operation starts, the position of the glue dams 205 and 206 is adjusted to an appropriate position early in the feedback control after the operation described below. It becomes possible to do. Further, even when there is not enough time to perform feedback control for the production of a short lot, it is possible to reduce waste of paper consumption and glue consumption.
[0022]
In the feedback control after the start of operation, the controller 210 captures captured images from the CCD cameras 212 and 213 and processes the captured images, thereby leaking from the glue dams 205 and 206 and causing the glue roll 202 to rotate. The glue adhering to the peripheral surface is detected (step A50). The glue can be detected by, for example, using a method of binarizing the captured image by focusing on the difference between the brightness of the peripheral surface of the gluing roll 202 and the brightness of the glue.
[0023]
Next, the controller 210, _W a [distance from the inside of the glue dam to glue out position (boundary position)] glue leakage width for Kakunori dam 205, 206 as shown in FIG. 5, calculates a _{W b} ( Step A60). In the present embodiment, the CCD cameras 212 and 213 and the controller 210 constitute a glue leak width detecting unit according to the present invention. Since the CCD cameras 212 and 213 have a wide viewing angle and a distortion occurs at the end of the viewing range, the distortion width of the image is corrected using a correction curve or a correction function, and then the leakage width of the glue is calculated.
[0024]
Further, the controller 210, the rotational speed of the motor 208 measured by the encoder 209 detects the current position (mechanical center of the reference position) _{L a} glue dam 205, the rotational speed of the motor 218 measured by the encoder 219 , it detects the current position _{L b} of the glue dam 206 (step A70). Then, the current position _L a, _{L b} and the leakage width _W a of the calculated glue in step A60, and a _{W b,} glue out positions of the right and left on the glue roll 202 of the glue dam 205 and 206 detected in step A70 ( (Actual paste positions) L1 _a and L1 _b are obtained (step A80).
[0025]
Then, the controller 210, the difference between the left target glue out position L0 _a and the actual glue out position _{L1 a (L0 a -L1 a)} , the right of the target glue out position L0 _b and the actual glue out position L1 _b seeking the difference _(L0 b -L1 _b), it determines whether their absolute value is the target value (the allowable range, of course may be zero) or within (step A90).
If the result of determination in step A90 is that the distance difference is within the target value, the process returns to step A50 again, and if the distance difference exceeds the target value, controller 210 calculates the amount of deviation of the distance difference from the target value (step A100). . Then, the controller 210 rotates each of the motors 208 and 218 in a direction to eliminate the calculated shift amount, and moves the glue dams 205 and 206 (Step A110).
[0026]
Such control, regardless of the degree of glue leaking from the glue dam 205 and 206, always glue out position on the glue roll 202 _L1 a, L1 _b target glue cutting position _L0 a, L0 _b, i.e. the central core 21 can be matched to both paper edge positions. Therefore, according to the gluing apparatus according to the present embodiment, all the glue can be accurately supplied to the core 21 without wasting the leaked glue, so that the glue that is excessive The occurrence of defective products can be suppressed, and waste of paper consumption and glue consumption can be reduced.
[0027]
(B) Others Although two embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and may be implemented with various modifications without departing from the spirit of the present invention. it can. For example, not only an imaging device such as a CCD camera but also a gloss sensor can be used as a detecting means for detecting the width of the glue leak. Since the glue is glossy, by detecting the gloss on the gluing roll and the meter roll by the gloss sensor, it is possible to detect the glue leaking from the glue dam onto the gluing roll or the meter roll.
[0028]
In the embodiment, the data on the position of the core in the machine width direction is obtained from the production management device to calculate the paper end position of the core. However, the CCD camera is placed on the center running line in the single facer. May be arranged to detect the center paper edge position from the captured image. In this case, preferably, the imaging device is disposed on a heating roll (in FIG. 1, the preheating roll 118 for the core) in the immediate vicinity of the gluing roll or on the downstream side of the heating roll. The paper width of the core shrinks due to the heating by the heating roll, and the position in the machine width direction changes before and after heating by the heating roll. By detecting the paper edge position, the paper edge position of the core at the time of gluing can be accurately detected.
[0029]
【The invention's effect】
As described in detail above, according to the single-facer gluing apparatus of the present invention, the glue roll position on the glue roll always coincides with the target glue break position regardless of the degree of glue leakage from the glue dam. It is possible to supply all the glue accurately to the core without wasting the leaked glue, suppress the generation of dirt and defective products due to excess glue sticking out of the core, and reduce paper consumption. And waste of glue consumption can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view showing a configuration of a single facer including a gluing device according to a first embodiment of the present invention.
FIG. 2 is a side view showing the configuration of the gluing device according to the first embodiment of the present invention.
FIG. 3 is a plan view showing a configuration of the gluing device according to the first embodiment of the present invention.
FIG. 4 is a flowchart illustrating a control method of position adjustment control of the glue dam according to the first embodiment of the present invention.
FIG. 5 is an explanatory diagram for explaining position adjustment control of the glue dam according to the first embodiment of the present invention.
[Explanation of symbols]
Reference Signs List 11 single facer 20 liner 21 core 22 single-stage sheet 113 pressure belt 114 upper roll 115 lower roll 200 gluing device main body 201 glue reservoir 202 gluing roll 203 meter roll 205, 206 glue dam 207, 217 screw shaft 208, 218 motor 209 , 219 Encoder 210 Controller 212, 213 CCD camera

Claims (4)

A gluing roll for attaching the glue in the glue tank to the core,
A glue dam that constitutes a side wall of the glue tank and controls a glue width of the glue to the glue roll by contacting the glue roll,
Glue dam position detecting means for detecting the position of the glue dam,
Moving means for moving the glue dam in the machine width direction;
Glue leak width detecting means for detecting a leak width of the glue leaking out of the glue dam on the glue roll,
A glue dam position detected by the glue dam position detecting means, and a glue break position calculating means for calculating a glue break position on the gluing roll from the glue leak width detected by the glue leak width detecting means;
Control means for controlling the moving means,
The control means is configured to calculate a shift between the glue breaking position calculated by the glue breaking position calculating means and a target glue breaking position, and control the moving means in a direction to eliminate the gap. A gluing device for a single facer, characterized in that: A glue leak width storing means for storing a glue leak width on the gluing roll,
Further provided is an initial position setting means for setting an initial position of the glue dam from the glue leak width stored in the glue leak width storage means and the target glue break position,
Prior to the start of operation, the control means is configured to control the moving means to preset the position of the glue dam to an initial position set by the initial position setting means. A gluing device for a single facer according to claim 1. 3. The gluing device for a single facer according to claim 1, further comprising a gloss sensor for detecting the gloss of the glue leaking from the glue dam, as the glue leak width detecting means. As the glue leak width detecting means, a camera arranged toward the contact portion, and an image processing means for performing image processing on a captured image of the camera and detecting glue leaking from the glue dam are provided. 3. The gluing device for a single facer according to claim 1, wherein

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