JPH0330489B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a method for gluing a single-sided corrugated sheet, and more specifically, a method for gluing a single-sided corrugated sheet and a liner manufactured by a single facer to a double facer (double-sided machine). In a corrugator line that manufactures double-sided corrugated sheets by gluing and adhering liners to the corrugated tops of single-sided corrugated sheets, the type of corrugation of the single-sided corrugated sheets supplied to the double facer is changed to produce double-sided corrugated sheets of different standards ( The present invention relates to a method for reliably applying glue to the corrugated top of a single-sided corrugated sheet whose corrugation type has been changed, without stopping the operation of the corrugator line, when manufacturing a corrugated corrugated sheet (or double-sided corrugated sheet).

Prior Art A series of corrugator lines installed in a corrugated sheet manufacturing factory consist of a single facer that produces single-sided corrugated sheets, a liner attached to the single-sided corrugated sheets obtained here, and a double-sided corrugated sheet (as required). It is equipped with a double facer to produce double-sided corrugated sheets (also double-sided corrugated sheets).
That is, in the case of a single facer, the core paper supplied thereto is pressed between a pair of corrugated rolls to give a desired corrugation, and a liner is bonded to the core paper to produce a single-sided corrugated board sheet. The types of flutes in corrugated paperboard sheets are A flute and B flute, depending on the number of flutes per unit length.
There are tiers, C tiers, E tiers, etc. Therefore, the type of double-sided corrugated cardboard sheet depends on which corrugation type the single-sided corrugated cardboard sheet is used as the base material. Note that the step heights (flute heights) are also different for each of the above-mentioned step types.

In addition, with double facer, a double-sided corrugated sheet is manufactured by laminating the supplied single-sided corrugated sheet and liner together.
By supplying two single-sided corrugated sheets and one liner, a double-sided corrugated sheet is produced.

As mentioned above, double facers produce double-sided corrugated cardboard sheets (or double-sided corrugated cardboard sheets), and there are various types of sheets depending on the corrugation type of the single-sided corrugated cardboard sheet that serves as the base material. Therefore, in corrugated board manufacturing factories, it is routinely necessary to change the type of double-sided corrugated sheet (double-sided corrugated sheet) manufactured by the double facer to another type according to unique production plans or requests from users. It is occurring in

In order to change the type of double-sided corrugated paperboard sheet (double-sided corrugated paperboard sheet) in this way, it is necessary to change the single-sided corrugated paperboard sheet of tier A, which is currently being supplied to the double facer, to a single-sided corrugated cardboard sheet of a different corrugation type (for example, tier B). It is necessary to change the switching.
In this case, it is necessary to connect the leading end of the B-corrugated single-sided corrugated cardboard sheet to the cut rear end of the A-corrugated single-sided corrugated cardboard sheet that is being supplied to the double facer.

However, conventionally, this sheet connection work (so-called sheet splicing) has relied entirely on manual labor as described below. In other words, conventionally, when changing a single-sided corrugated sheet being supplied to a double facer to a single-sided corrugated sheet of a different corrugation type due to a change in specifications, the entire operation of the corrugator line was temporarily stopped.
Immediately upstream of the double facer, an operator manually cuts the single-sided corrugated cardboard sheet (for example, A tier) that has been supplied so far with a cutter. Next, select a different row type (for example, B
After the leading end of the single-sided corrugated cardboard sheet of the corrugated sheet was connected to the rear end of the previously cut single-sided corrugated cardboard sheet via double-sided adhesive tape, running supply to the double facer was started. Note that some users cut the single-sided corrugated sheet that was being supplied, consume the sheet as it is in the double facer, and then manually insert a new single-sided corrugated sheet of a different corrugation type into the inlet of the double facer. In some cases, the liner is inserted, starts running, and then is bonded to a waiting liner.

However, in either case, complicated manual work by workers is required, which is extremely dangerous, and the operation of the entire corrugator line must be stopped each time this work is performed, which significantly reduces the production efficiency of corrugated sheets. There were flaws. In addition, such stage changes due to specification changes are frequently made during the operating hours of the day, and in this case, the adverse effects on the safety of the work and the operating efficiency of the corrugator line are doubled.

Therefore, one proposal to deal with this problem has been filed by the applicant of the present invention as an invention related to Japanese Patent Application No. 57-4335 titled "Method and Apparatus for Changing Corrugated Cardboard Sheets." In this method, a double-sided adhesive tape is attached to the rear end of the single-sided corrugated cardboard sheet that is being fed while running to the double facer, or to the tip of the single-sided corrugated cardboard sheet of a different corrugation type that is scheduled to be supplied next time. to synchronize with the speed,
The single-sided corrugated cardboard sheet related to the next supply schedule is run. Then, at the timing when the rear end of the single-sided corrugated cardboard sheet related to the running supply and the leading edge of the single-sided corrugated cardboard sheet related to the next scheduled supply come close to each other, both sheets are bonded together with the double-sided adhesive tape while in the running state. ing. That is, when the corrugation type of a single-sided corrugated cardboard sheet is changed by a corrugation type change command, different single-sided corrugated cardboard sheets can be connected without stopping the corrugator line, so that sheet production efficiency can be significantly improved. Furthermore, since the sheet connection work can be performed automatically, there is an advantage that the operator can be relieved from the dangerous connection work.

Problems to be Solved by the Invention Here, the corrugator line is indispensable with a gluing device that applies a gluing material to the corrugated top portion of the single-sided corrugated paperboard sheet that is supplied to the double facer. This gluing device includes a gluing pan in which a predetermined amount of gluing material is stored, and a gluing device whose lower part is immersed in the gluing material stored in the gluing pan, as disclosed in JP-A-53-137797, for example. It is equipped with a roll and a doctor roll that is in circumferential contact with the sizing roll and scrapes off the sizing material adhering to the circumferential surface of the sizing roll. In addition, a rider roll is arranged to maintain a required gap from the glue roll,
The structure is such that glue is applied to the top of the corrugation of the single-sided corrugated cardboard sheet that is passed between both rolls.

The rider roll functions to press the corrugated top part of the single-sided corrugated paperboard sheet passed between the roll and the gluing roll against the gluing roll, and to evenly apply the size material to the corrugated top part. For this reason, the gap defined between the two rolls is dimensioned to correspond to the corrugation height of the single-sided corrugated cardboard sheet that is passed between the two rolls.

However, when a single-sided corrugated cardboard sheet whose corrugation type is different from the single-sided corrugated sheet that is being fed while traveling due to a corrugation type change command is passed between the rider roll and the gluing roll, the corrugation height is higher than the gap between both rolls. If the height of the step is too small, the paste will not be applied to the top of the step of the sheet, and if the step height is greater than the gap, the step will collapse. Therefore, when the stage type is changed, it is necessary to adjust the gap between the rider roll and the gluing roll in the gluing device. Conventionally, this gap adjustment work was performed by temporarily stopping the corrugator line.

That is, according to the method related to the earlier application mentioned above, when a corrugation type change command is issued, the work of connecting single-sided corrugated sheets of different corrugation types can be performed continuously without stopping the corrugator line. Gap adjustment work in the gluing device still required the corrugator line to be stopped. Therefore, a new problem to be solved was how to adjust the gap in the gluing device without stopping the corrugator line.

Purpose of the Invention The present invention has been proposed in order to suitably solve the above-mentioned drawbacks inherent in gluing a single-sided corrugated sheet of which the type of corrugation has been changed. To provide a method for reliably gluing the corrugated top part of a single-sided corrugated board sheet without stopping the operation of the corrugated board.

Means for Solving the Problems In order to overcome the above-mentioned problems and achieve the intended purpose, the method for gluing a single-sided corrugated sheet according to the present invention includes a glue pan for storing glue, and a glue pan for storing glue. A gluing means includes a gluing roll whose lower part is immersed in a glue material and is rotatably arranged, and a rider roll which is movable close to and away from the gluing roll with a single-sided corrugated sheet sandwiched therebetween. , two sets of single-sided corrugated cardboard sheets are arranged in series in the running direction, and when the rider roll is brought close to the gluing roll, the gap formed between both rolls is replaced by setting the dimension to correspond to the corrugation height of the corrugated sheet, and setting the dimension in the other gluing means to correspond to the corrugation height of a single-sided corrugated sheet of a corrugation type different from the specific corrugation type; When gluing a single-sided corrugated sheet of corrugated type, the rider roll of one gluing means is brought close to the gluing roll, and the rider roll of the other gluing means is spaced apart from the gluing roll. By passing a corrugated cardboard sheet between both rolls, a glue is applied to the corrugated top part of the sheet through one of the gluing means, and by changing the corrugation type, a different corrugation type is applied to the rear end of the running single-sided corrugated sheet. When the two single-sided corrugated sheets are connected and run continuously, the rider roll of the one-sided gluing means is activated at the timing when the connecting portion of both single-sided corrugated sheets reaches the installation position of one of the gluing means. is separated from the gluing roll, and the rider roll of the gluing means is brought close to the gluing roll at the timing when the connecting portion of the double-sided single-sided corrugated sheet reaches the installation position of the other gluing means. By switching to the above, the sizing agent is applied to the corrugated top portions of single-sided corrugated cardboard sheets of different corrugation types via the other gluing means.

Embodiments Next, the method for gluing a single-sided corrugated cardboard sheet according to the present invention will be described below with reference to preferred embodiments and the accompanying drawings.

FIG. 1 is a schematic configuration diagram of a gluing device for single-sided corrugated paperboard sheets in which the method according to the present invention is suitably carried out, and the gluing device 50 includes a single facer located upstream of a corrugator line. , and a double facer (none of which is shown) located on the downstream side. Further, preheaters 55 and 57 (described later) are arranged immediately upstream of the gluing device 50.
The single-sided corrugated cardboard sheet 51 supplied from the single facer is preheated by preheaters 55 and 57, and then supplied to the gluing device 50.

(Regarding Gluing Apparatus) As shown in FIG. 1, the gluing apparatus 50 has a first gluing means 1 and a second gluing means 2 disposed in a vertical relationship on a device frame 52, and a gluing means 1 and a second gluing means 2 arranged in a lower stage. A third gluing means 3 is located downstream of the second gluing means 2.
are arranged in series. Since these three gluing means 1, 2, and 3 have the same structure, only the first gluing means 1 will be explained. Note that the numbers indicating the same constituent members in each of the gluing means 1, 2, and 3 are indicated by the same numeral at the end, and in the tens place, the first gluing means 1 is 1, the second gluing means 2 is shall be distinguished by 2 and 3 for the third gluing means 3.

The first gluing means 1 includes a gluing roll 17, a gluing roll 18, a gluing pan 19, and a rider roll 14.
It basically consists of. That is, the device frame 52 is provided with a single-sided corrugated cardboard sheet 51.
A glue pan 19 is disposed below the traveling path of the machine, and a predetermined amount of glue is stored in the glue pan 19. Inside the glue pan 19, a glue roll 17 whose lower part is dipped in glue is rotatably disposed, and the roll 1
The adhesive can be attached to the surface of 7. Further, a glue cutting roll 18 is rotatably disposed so as to be able to circumferentially contact the glueing roll 17, and the glue cutting roll 18
functions to scrape off excess glue adhering to the surface of the glue roll 17 to form a uniform glue film, and to transfer an appropriate amount of glue to the corrugated top portion of the single-sided corrugated sheet 51.

A frame 15 extending in the feeding direction of the single-sided corrugated paperboard sheet 51 is rotatably supported on the device frame 52 located above the glue pan 19 via a pin 12 at one longitudinal end thereof.
In this frame 15, a rider roll 14 that functions to sandwich a one-sided corrugated sheet 51 between itself and the glue roll 17 and apply glue to the corrugated top portion of the sheet 51 is installed in parallel with the glue roll 17. It is arranged so that it can rotate freely. Further, a piston rod 16a of a piston cylinder 16 disposed on the device frame 52 is connected to the other end of the frame 15. Therefore, by biasing the piston cylinder 16 in the forward and reverse directions, the frame 15
2 as a fulcrum and rotates within a required angle range, the rider roll 14 is moved toward and away from the pasting roll 17.

The frame 15 has a stopper (not shown).
is arranged, and the piston cylinder 16 is connected to the rod 16
When a is biased in the direction of pulling it into the cylinder,
The stopper is set to come into contact with a fixed portion (not shown) to form a required gap between the pasting roll 17 and the rider roll 14. In this state, by passing the single-sided corrugated sheet 51 through the gap between the rolls 14 and 17, the sheet 5
Glue is applied to the top of step 1. Note that by biasing the piston cylinder 16 in the direction in which the rod 16a extends and separating the rider roll 14 from the gluing roll 17, the single-sided corrugated sheet 51
can be passed between the rolls 14 and 17 without applying glue to the top of the step.

The stopper is configured to be adjustable in position, and the size of the gap can be varied by adjusting the stopper. Note that the code 13,2
3 indicates a guide roll that guides the single-sided corrugated paperboard sheet 51 supplied from the single facer to the first gluing means 1 or the second gluing means 2.

As shown in FIG. 1, a preheater 55 for preheating the single-sided corrugated paperboard sheet 51 guided by the guide roll 54 is provided on the upper part of the device frame 52, and the single-sided corrugated paperboard sheet 51 that has passed through the preheater 55 is It is configured to be supplied to the gluing means 1. Further, a guide roll 56 and a preheater 57 are provided on the upstream side of the second gluing means 2, and the single-sided corrugated sheet 51 that has passed through the preheater 57 is transferred to the second gluing means 2 or the third gluing means 3.
It is now being supplied to

In addition, when manufacturing a double-sided corrugated paperboard sheet using the double facer, the single-faced corrugated paperboard sheet 51 supplied from the single facer is supplied to the double facer via the second gluing means 2 or the third gluing means 3. The first gluing means 1 is used when producing a double-sided corrugated cardboard sheet using a double facer.

A pair of guide rolls 41 and 43 are arranged below the second gluing means 2 with a predetermined distance between them,
A liner preheater 40 is disposed between both guide rolls 41 and 43. In other words, the liner L is fed out from a mill roll stand (not shown).
is wound around a preheater 40 and subjected to preheating and humidity control, and is then supplied to the double phaser.

(Regarding means for detecting connection portions of single-sided corrugated paperboard sheets) As shown in FIG.
functions to detect a detection point P (see FIG. 3) attached to the connecting portion of two types of single-sided corrugated cardboard sheets 51A and 51B that are connected by changing the type of corrugation as described later. As this detection point P, aluminum foil or the like is suitably used, for example, and the detection point P is attached at the same time when the single-sided corrugated sheets 51A and 51B are connected. Further, a sensor 6 is disposed close to the disposed position of the guide roll 56, and this sensor 6 is connected to a detection point 56 disposed on the guide roll 56.
It functions to detect the rotation speed of the roll 56 and measure the rotation speed of the roll 56. Then, the amount of movement of the single-sided corrugated cardboard sheet 51 is detected from the rotation speed of the guide roll 56, and as will be described later, the detection point P attached to the connection part of the sheet 51 is detected by the second gluing means 2 or the third gluing device. It is arranged to bias the corresponding piston cylinder 26, 36 when the means 3 is located at its location.

Note that sensors are disposed close to the second gluing means 2 and the third gluing means 3, respectively, and the detection points P of the single-sided corrugated sheet 51 are detected by the sensors, and the corresponding piston cylinders 26 and 36 are activated. It may also be controlled.

Effects of the Embodiment Next, the method for gluing single-sided corrugated cardboard sheets shown in FIGS. 2a to 2d will be described below in relation to the operation of the apparatus for suitably carrying out the method. For convenience of explanation, the single-sided corrugated cardboard sheet in the A tier is designated by the reference numeral "51A", and the single-sided corrugated cardboard sheet in the B tier is designated by the numeral "51B".

Prior to the operation of the corrugator line, the size of the gap between the rider roll 24 and the gluing roll 27 in the second gluing means 2 is set to correspond to, for example, the height of the single-sided corrugated cardboard sheets 51B of the B tier.
Moreover, the rider roll 34 in the third gluing means 3
The gap between the sheet and the adhesive roll 37 is set to a size corresponding to the height of the one-sided corrugated cardboard sheet 51A of the A-tier, for example. Note that the gap between the rider roll 14 and the gluing roll 17 in the first gluing means 1 is as follows:
For example, the dimensions are set to correspond to the height of the single-sided corrugated cardboard sheet 51A of the A stage.

In the corrugator line, as shown in FIG. 2a, the single-sided corrugated cardboard sheets 51B in the B tier are supplied to the double facer via the preheater 57 and the second gluing means 2, and the double-sided corrugated cardboard sheets in the B tier (not shown) are supplied to the double facer. is manufactured. In other words, at this time, the rider roll 24 of the second gluing means 2 is close to the gluing roll 27, and the single-sided corrugated sheet 51B passes through the preset gap, and evenly coats the corrugated top part of the sheet 51B. A glue is applied to the surface. Moreover, in the third gluing means 3,
The piston cylinder 36 is biased in the direction in which its piston rod 36a extends, thereby separating the rider roll 34 from the pasting roll 37 and allowing it to pass through the single-sided corrugated sheet 51B without applying pasting material. ing.

In this state, when a command to change the type of single-sided corrugated cardboard sheet 51 is issued, the single-sided corrugated cardboard sheet 51A of the A stage is connected to the rear end of the single-sided corrugated cardboard sheet 51B of the B stage currently being supplied. At this time, a third
As shown in the figure, an aluminum foil that functions as a detection point P is pasted. As the single-sided corrugated sheet 51B advances, as shown in FIG.
The sensor 6 that detects a starts measuring the number of rotations of the roll 56.

As the single-sided corrugated sheet 51B advances, the sensor 6 that detects the number of rotations of the guide roll 56 detects that the detection point P is located between the rider roll 24 of the second gluing means 2 and the gluing roll 27 from the position where the sensor 5 is disposed. When the rotational speed corresponding to the distance reached between the two is measured (see FIG. 2c), the piston cylinder 26 of the second gluing means 2 is urged in the direction in which the piston rod 26a thereof extends. As a result, as shown in FIG. 2d, the frame 25 rotates about the pin 22 and moves from the glue roll 27 to the rider roll 2.
4 are separated.

Further, the single-sided corrugated sheet 51B advances, and the sensor 6 detects the rider roll 34 of the third gluing means 3.
When it is detected that the detection point P has arrived between the gluing roll 37 and the gluing roll 37, the piston cylinder 36 of the third gluing means 3 is urged in a direction to draw the piston rod 36a into the cylinder. This results in
As shown in FIG. 2d, the rider roll 34 is close to the gluing roll 37, and a gap corresponding to the height of the single-sided corrugated cardboard sheet 51A of the A stage is formed between the rolls 37 and 34. Therefore, both rolls 37,
A sizing agent is evenly applied to the corrugated top portion of the single-sided corrugated cardboard sheet 51A passing between the sizing rollers 34 via the sizing roll 37.

At this time, the single-sided corrugated cardboard sheet 51A passing between the rider roll 24 and the gluing roll 27 of the second gluing means 2 is not pasted by the gluing roll 27. Then, the single-sided corrugated cardboard sheet 51A of the A tier, whose top part is coated with glue by the third gluing means 3, is supplied to the double facer and adhered to the liner L, thereby producing the double-sided corrugated cardboard sheet of the A tier.

In addition, from the single-sided corrugated cardboard sheet 51A of A tier to B
Even when the type of corrugation is changed to single-sided corrugated sheet 51B, the piston cylinder 26 of the second gluing means 2 and the piston cylinder of the third gluing means 3 are changed based on the measurement signal of the sensor 6, as described above. 36 is urged in a predetermined direction, and the second gluing means 2 applies glue to the top of the corrugated board of the single-sided corrugated paperboard sheet 51B of the B tier.

Effects of the Invention As described above, according to the method for gluing a single-sided corrugated cardboard sheet according to the present invention, by changing the corrugation type of the double-sided corrugated cardboard sheet (or double-sided corrugated cardboard sheet) manufactured by the double facer, the double-sided corrugated sheet is supplied to the double facer. When the front ends of different single-sided corrugated cardboard sheets are pasted to the rear ends of the single-sided corrugated cardboard sheets inside and are continuously supplied, different corrugation types can be applied by selectively switching and using the gluing means arranged in series. The paste can be reliably applied to the corrugated top portion of a single-sided corrugated cardboard sheet. Therefore, it is possible to change the type of tray without stopping the corrugator line and adjusting the gap between the gluing roll and the rider roll, so that sheet production efficiency can be greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a gluing device that can suitably carry out the method for gluing single-sided corrugated cardboard sheets according to the present invention, and FIGS. 2 a to 2 d show states in which the gluing device applies gluing to single-sided corrugated cardboard sheets. FIG. 3 is an explanatory diagram showing the connecting portion between the single-sided corrugated cardboard sheet in the B tier and the single-sided corrugated cardboard sheet in the A tier. 2... second gluing means, 3... third gluing means, 24,
34... Rider roll, 27, 37... Gluing roll,
29, 39...Glue bread, 51A...One-sided corrugated cardboard sheet in A tier, 51B...One-sided corrugated cardboard sheet in B tier.

Claims (1)

[Scope of Claims] 1. Glue pans 29, 39 for storing glue, and gluing rolls 27, 37 rotatably arranged with their lower parts immersed in the glue stored in the glue pans 29, 39; Gluing means 2 and 3 are comprised of rider rolls 24 and 34 which are movably disposed near and away from the gluing rolls 27 and 37 with a single-sided corrugated sheet 51 in between.
are arranged in series in the running direction of the single-sided corrugated sheet 51, and the rider roll 2 is attached to the glued rolls 27, 37.
The gap formed between the two rolls when the rolls 4 and 34 are brought close to each other is set to a size corresponding to the corrugation height of the single-sided corrugated cardboard sheet 51B or 51A of a specific corrugation type in one gluing means 2, and In the gluing means 3, the dimensions are set to correspond to the corrugation height of the single-sided corrugated cardboard sheet 51A or 51B of a corrugation type different from the specific corrugation type, and the gluing is applied to the single-sided corrugated cardboard sheet 51B or 51A of the specific corrugation type. When performing this, the rider roll 24 in one of the gluing means 2 is replaced with the gluing roll 2.
7, and with the rider roll 34 of the other gluing means 3 spaced apart from the gluing roll 37, the one-sided corrugated sheet 51B or 51
By passing the sheet A between both rolls 24, 27 and 34, 37, the sheet 51B or 51
Glue is applied to the top of the corrugation A via one of the gluing means 2, and by changing the corrugation type, the single-sided corrugated cardboard sheet 51A or 51B of a different corrugation type is connected to the rear end of the traveling single-sided corrugated cardboard sheet 51B or 51A. When the two single-sided corrugated sheets 51B, 51A or 51A, 51B are connected to each other at the position where one of the gluing means 2 is disposed, the gluing means 2 is moved. The rider roll 24 is separated from the glue roll 27, and the double-sided corrugated cardboard sheets 51B, 51
At the timing when the connecting part of A or 51A, 51B reaches the position where the other gluing means 3 is installed,
By switching the rider roll 34 in the gluing means 3 to be close to the gluing roll 37,
Single-sided corrugated cardboard sheet 51A or 5 of different corrugation types
A method for gluing a single-sided corrugated cardboard sheet, characterized in that a gluing agent is applied to the corrugated top portion of the corrugated sheet 1B via the other gluing means 3.