JPS6255125A - Starching siding adjusting method to web material in corrugator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention applies a glue cap to a glue roll when bonding two web materials (paper, corrugated sheets) to be bonded together in a glue tank. The present invention relates to a method for adjusting a glue adhering cap to a web material in a corrugator, which is adjusted by controlling the movement of a dam setting position.

[Conventional technology]

The method of automatically controlling the set position of a pair of dams installed in the glue tank of a corrugator by detecting the movement of the running web in the width direction, and thereby adjusting the size of the glue adhesion to the glue roll, has been proposed in practice. This is already known from Publication No. 59-9735.

In the method for adjusting the glued cap according to this publication, two parts to be joined are
One liner of the running web material to which the glue is applied (
Detectors are provided at predetermined positions immediately in front of the joining portion, corresponding to only the edges of the liner paper, respectively, and these detectors are movable in the width direction of the liner until they detect the corresponding edge of the paper. Then, based on the signal until the detector detects the paper edge, the corresponding dam in the glue tank is moved to follow the movement of the detector, and the paper edge position of the batting paper to which glue is applied is moved. At the same time, the width of the glued part was adjusted.

[Problem that the invention seeks to solve]

However, in the above adjustment method, the dam setting position in the glue tank is controlled by detecting the edge of only the batting paper, so when the width of the other web material is smaller than the width of the batting paper, or Even if the widths of the two webs are approximately equal, if their centers are shifted from each other, the web material will run with the glue applied to the liner paper by the glue roll not being covered by the other web material and sticking out. The glue may adhere to corrugated rolls, pressure rolls, etc. attached to the glued area, causing stains or forming glue balls.

Therefore, there is a problem in that the dirt and glue balls generated can result in defective corrugated board sheets due to dirt and poor corrugation of the batting paper, and cause machine troubles. Furthermore, there is a problem in that the amount of glue consumed is wasted due to the glue application to unnecessary parts of the liner paper.

[Means for Solving the Problems] As a means for solving the above-mentioned problems, the present invention uses a detector installed at an appropriate position immediately before the joint of two web materials to be joined in a corrugator to detect each of the above-mentioned problems. Each paper edge of the web material is detected, and the detection signal is converted into a paper edge position signal representing the position of each paper edge by a conversion circuit, and the corresponding one of the two web materials and one paper edge position signal and Compare the paper edge position signals of the other side and the other side, select and output the paper edge position signals corresponding to the inner paper edge position, and set the position of each corresponding dam to the inner paper edge position based on each output signal. We adopted an adjustment method that controls the movement so that they match the paper edge positions.

[Effect]

Two web materials to be joined in a corrugator are each fed to the single facer from two lines provided before and after the single facer, for example. 2 between single facer corrugated roll and king karol
The sheets of web material are joined, and the width of the glued part for joining is determined by the width of the glued part from the glued roll to the web material (batten paper) corrugated by the corrugated rolls. Therefore, the left and right paper edges of each web material are detected using a detector installed at an appropriate position just before the web material joint, such as the single facer, and this detection signal is converted into a paper edge position signal. hand,
The position of each dam is controlled to move to the paper edge position that is always inside of the left and right paper edge positions of the two web materials.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a diagram showing a state in which the method for adjusting the width of the glued portion of a web material is applied to a single facer in a corrugator.

The liner 3 fed through the break heater 1 in the figure is placed on a mill roll stand (
(not shown) and passes through the splicer to the breaker heater 1.
It is preheated at , and then laminated with the mating paper by the pressure roll 2 . On the other hand, the linen paper 6, which is similarly fed from another mill roll stand (not shown) provided above the right line in the figure, passes through the splicer and rolls 4.5.
is sent to the corrugating roll 7.8 via the corrugating roll 7.8.
After being corrugated by the glue roll 1o attached to the glue tank 9, the glue is applied to the corrugated top of the liner paper 6 while adjusting the amount of glue applied by the doctor roll 11, and then the liner paper 3 is pressed against the liner paper 3 by a pressure roll. 2 and corrugated roll 8.

A video length measuring device 21 is placed at two appropriate positions on the running path of each of the liner paper 3 and the insert paper 6 to be supplied to the single facer, and the video length measuring device and a light source 22 are provided, respectively. One pair of these measuring devices is provided at each end of the web material.

In order to adjust the width of the gluing part relative to the gluing roll 10, the second
As shown in the figure, a dam 12 is provided in the glue tank 9, and this dam 12 is fixed to a common base 14 of a motor 13. This common base 14 transmits the power of the motor 13 to a rotating sleeve 15 via a chain and a sprocket. The fixed screw shaft 16 of the sleeve is configured to be moved by opposing rotation, thereby moving the set position of the dam 12.

FIG. 3 shows a method for measuring the width direction positions of the liner paper 3 and the batting paper 6 at predetermined positions using the video length measuring device 21, and automatically moving the set position of the dam 12 according to these measurement words. This is a sequence diagram of a control circuit.

This control circuit includes video length measuring devices 21L and 21R that have light sources 22L and 22R provided on the liner paper side to detect the left and right paper widths of the liner paper, and a conversion device that converts the video signals detected by these length measuring devices into digital signals. 23, a coefficient multiplier 242b that multiplies the output signal by a certain factor to make it a signal corresponding to the actual length, and a coefficient multiplier 242b, which converts the input signal from the coefficient multiplier into a signal corresponding to the actual length of the paper from the reference center position between the left and right video length measuring devices. A liner paper edge detection circuit consisting of adders 25a and 25b that add a certain reference value to a nameplate input signal representing the edge position, and a liner paper edge detection circuit having exactly the same configuration as this detection circuit. and a comparator 26L1 that compares the left side paper edge signals from the lychee paper and insert paper edge detection circuits, as well as a comparator 26 that compares the right side paper edge signals.
Comparators 27L and 27R1 that compare the output signals of the left and right comparators 26L and 26R with the position signals of the left and right dams 12L and 12R in the glue tank, respectively, and pulse signals corresponding to the left and right dam positions. Pulse transmitters 29L and 29R that emit pulses, and glue tank dam position counters 28L and 28L that reversibly count their output signals as position signals, respectively.
28R.

Video length measurers 21L, 21R, 21L, 21 in the figure
R is fixed at an appropriate position on the fixed frame of the machine body. Although it is desirable to fix the length measuring devices so that the center position serving as a reference between the left and right length measuring devices coincides with the machine center, it does not necessarily have to coincide with the machine center. Outside the visual range of the video length measuring device 21L, 21R or 21L, 21R installed in this way, equal distance The adders 25a, 25b, 25c, and 25d are set in advance to add the signals having the values. Furthermore, the video length measuring devices 21L, 21R, 21L, and 21R are provided at positions such that the edge of the paper always passes within the visible range even if the width of the paper is the minimum or maximum width used in the full gater.

The operation of this embodiment configured as above will be explained below.

Changes in the paper edge position due to the video length measuring devices 21L and 21R are as follows:
It is measured as follows (video length measuring devices 21L, 21
The same applies to R).

The respective video signals measured by the video length measuring devices 21L and 21R are sent to the signal converter 23 as a signal representing the distance Y1 + "2 from the reference position X to the actual left and right paper edges within the viewing range. These video signals are converted into digital signals in the signal converter 23, and further converted into layer-by-layer signals corresponding to the actual lengths indicated by Yl and Y2 in the figure, by the coefficient multiplier 242.24b. , the reference position signal X is added to the output signal in adders 25a and 25b set to add a signal representing the reference position X. Therefore, the output signal is added to the output signal from the reference center position. The reference position signal X represents the actual left and right paper edge positions of the video length measuring device 21L,
Even if the mounting position of 21R is shifted to the left or right with respect to the reference center position and is not at an equal position, the values of the left and right reference position signals X are changed to the actual values X, , X2 corresponding to the deviation.
By doing so, the deviation from the reference center position can be easily adjusted.

The above-mentioned detection operation of liner paper side paper edge detection rotation is exactly the same for the liner paper paper edge detection circuit.

Next, as for the output signal from the detection circuit detected as described above, the comparator 26L converts the signals A and C of the left paper edge on the liner paper side and the centerboard lower side to the signal B of the right paper edge. , D are compared by the comparator 26R, and the signal with the smaller value is used as the output signal, and the comparator 26R outputs the smaller output i' word, such as B, and so on. That is, comparator 26L.

The output signal of 26R is a signal of the paper edge always located inside (on the reference center line side) among the paper edge positions of the liner paper and the insert paper. Further, in response to the output signals to the comparators 26L and 26, signals from the glue tank dam position counters 28L and 28R, which store the dam position of the glue tank, are sent to the comparators 26L and 26, respectively.
7L and 27R compare, that is, compare the selected paper edge position and the dam position, and when the dam position is inside the selected paper edge position, the difference signal is used to generate the open signal shown in the figure. and move the dam outward until the difference signal becomes zero. Conversely, when the dam position is outside the selected paper edge position, similarly give the closed symbol shown in the figure,
The dam position is controlled by driving the left and right drive motors 13L and 13R to move the dam inward until the difference signal becomes zero.

FIG. 4 is a diagram showing various overlapping states of paper edges when joining liner paper and batten paper.

In the figure (a), the width of the liner paper 3 is larger than the liner paper 6, and in the fb1 figure, the width of the liner paper 3 is smaller than the liner paper 6, and in the figure (C), the widths of the two are almost equal. , one of them is slightly larger, and as shown in the figure, for example, the left edge of the batten paper 6 is on the outside of that of the liner paper 3, and the right edge of the batten paper 6 is on the inside of that of the liner paper 3. It may happen.

In the case of the figure (a), when the left and right width direction setting positions of the dam are controlled to positions corresponding to the lines of both paper edges of the liner paper 3, the glue roll 10 has glue with a width larger than the width of the batting paper 6. , and this protruding glue transfers to the corrugating roll 8 and stains it, so to avoid this, the set position of the dam is controlled to correspond to the thickness of the corrugating paper 6.

In the case of (b1), the paper width of the batten paper 6 is larger than that of the liner paper 3, so the dam should be placed above both ends of the liner paper 3 to avoid contaminating the pressure roll 2, etc. Just control it.

Furthermore, in the case of figure (C), in order to avoid glue from adhering to the shaded area of the figure, the dam setting position corresponds to the paper edge of liner paper 3 on the left side and the paper edge of batting paper 6 on the right side. control to do so.

In this way, if the dam position is always controlled to the inner edge of the two sheets of paper in any overlapping state, it is possible to prevent excess glue from adhering. I see that it is possible. Incidentally, in actual control, the set position of the dam may be set slightly further inward than each inner paper edge position to prevent the occurrence of defective products due to adhesive extrusion.

In addition, in the method of detecting the paper edge position using the video length measuring device used in this embodiment described above, the video length measuring device body is fixed to a fixed frame of the machine body, and the paper edge position is detected by increasing or decreasing the received light signal from the light source. It can measure the movement of the position, and is fundamentally different from the conventional phototube detection method, which moves the phototube to follow the movement of the paper and detects the paper edge position from the distance of movement. Therefore, it will be understood that this method has extremely high compatibility as a position detection method.

〔effect〕

As detailed above, the dam's imprinting position is the inner side of the left and left paper edges and the right and right paper edges of the two web materials from the reference center position. Since the movement of the dam is controlled to match the position, it is possible to prevent the glue that is attached to the liner paper by the glue roll from spreading over an unnecessary area, thereby preventing wasteful consumption of glue. At the same time, it is possible to avoid stains and defective products due to adhesion of excess glue.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of an apparatus for carrying out the method for adjusting the width before gluing according to the present invention, and FIG. 2 is a diagram showing the line II-It in FIG. 1.
3 is a diagram showing the electric control circuit of the adjusting device of this embodiment including the arrangement of the video length measuring device, and FIG. 4 is a diagram showing the overlapping state of two web materials. It is a diagram. 3... liner paper, 6... medium paper, 7.8... corrugated roll, 9... glue tank, 10... glued roll, 12.
12L, 12R...Dam, 13L, 13R...
Motor, 21L, 21R, 21L, 21R...Video length measurer, 23.23...Signal converter, 26L, 26
R, 27L, 27R... Comparator.

Claims (1)

[Claims] (1) Each paper edge of each web material is detected by a detector installed at an appropriate position just before the joint of two web materials to be joined in a corrugator, and the detection signal is sent to a conversion circuit for each paper edge. A paper edge position signal representing the position is converted into a paper edge position signal representing the position, and the paper edge position signals of the corresponding one and one of the two web materials and the paper edge position signals of the other and the other are compared respectively to correspond to the inner paper edge position. A web material in a corrugator, characterized in that paper edge position signals are selected and outputted, and movement is controlled based on each output signal so that the position of each corresponding dam corresponds to the inner paper edge position. How to adjust the adhesive width.