JP2002326187A - Trim processing device and trim processing method for corrugated machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method processing a trim generated at trimming of a corrugated cardboard sheet, capable of certainly and efficiently processing a special trim that is hard to be sucked to a trim chuter, in a corrugated machine. SOLUTION: A slitter of a slitter scorer 2 cuts a corrugated cardboard web 1 supplied from a corrugating line in a travelling direction, and trims unnecessary parts of both side end parts in a width direction of the corrugated cardboard web 1. The special trim 6a that is generated by trimming of the corrugated cardboard web 1 and larger than specified width is led to the outside of the corrugating line by a guide means 20. The special trim 6a led by the guide means 20 is certainly subjected to cut processing in a chip processing device 61.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugating machine for manufacturing a corrugated cardboard sheet, and more particularly to a corrugating machine for trimming a corrugated cardboard sheet and treating a trim produced by the trimming.

[0002]

2. Description of the Related Art FIG. 5 is a side view showing the structure of a conventional corrugating machine after a slitter scorer, and FIGS.
FIG. 2 is a top view of a corrugated cardboard web processed by the slitter scorer. As shown in FIG. 5, the first unit 2a and the second unit 2 are provided as main components in the downstream part (after the slitter scorer) of the conventional corrugating machine.
b, a slitter scorer 2, each unit 2a, 2
b is provided with trim shooters 7a and 7b (indicated by reference numeral 7 if not individually distinguished), cut-offs 3, stackers 5 and the like provided at the downstream end of the corrugated cardboard web 1 formed at the upstream portion. 4 is processed.

A slitter scorer 2 includes a slitter device (or simply referred to as a slitter) for cutting the corrugated cardboard web 1 bonded in the preceding step at a required position along the web running direction as shown by SL in FIG. As shown by CL in FIG. 6, a scorer device (or simply referred to as a scorer) for scoring along the web running direction is provided. In particular, trimming of an unnecessary portion (trim) 6 at the left and right edges of the corrugated cardboard web 1 in the slitter is called trimming.

As shown in FIG. 5, the slitter scorer 2 is provided with two sets of a first unit 2a and a second unit 2b, so that when one unit is in operation, the other unit is operated. Since the next ruled line and the width (position) of the cutting are prepared for the next order, the order can be changed instantaneously and efficiently by switching the unit when changing the order of the product sheet.

[0005] The trim shooter 7 has a slitter scorer 2.
It moves to the position where the trim 6 generated by the slitter scorer 2 passes at both ends in the width direction of the corrugated cardboard web 1 at the downstream end, and is trimmed by a vacuum suction device (not shown).
, Only the trim 6 is vacuum-sucked and sent to a shredder as a waste disposal device (not shown).

The cut-off 3 is a device for cutting the corrugated paper web 1 into individual corrugated paper sheets 4 (cutting the corrugated paper web 1 over its entire width). Stacker 5
In FIG. 5, only a part of the corrugated cardboard sheet is cut off by the cutoff 3, and the corrugated cardboard sheets 4 are sequentially stacked and then discharged outside the machine.

[0007] The conventional corrugating machine trim processing apparatus is configured as described above.
After the slitter scorer 2 performs scoring and trimming at a predetermined position in accordance with the product order, the trim 6 generated by the trimming is vacuum suctioned from the trim shooter 7 and processed by a shredder. Further, the corrugated cardboard web 1 from which the trim 6 has been removed is conveyed to the cutoff 3 and cut into a length corresponding to the product order to become a corrugated cardboard sheet 4 as a product sheet. Thereafter, the sheets are transported to the stacker 5 and sequentially stacked, and then discharged outside the apparatus.

The details of the crease and cut processing on the corrugated cardboard web 1 performed in the slitter scorer 2 as described above will be described with reference to FIG. FIG. 6 shows an example of an order change of the corrugated cardboard web 1 in the slitter scorer 2, which is on the right side of the chain line (corrugated cardboard web 1).
The old order is on the downstream side in the running direction and the left side (corrugated web 1)
The upstream side in the traveling direction) indicates a new order. The old order is a corrugated cardboard web 1 that has been scored and cut by one unit of the slitter scorer 2, and the new order is a corrugated cardboard web 1 that has been scored and cut by the other unit. In FIG. 6, the solid line is the cutting line SL.
, And the broken line indicates the ruled line CL. Normally, the corrugated cardboard web 1 passes through the center of the slitter scorer 2 and is cut and scored symmetrically so that the trim width of the corrugated cardboard web 1 is also equal to the left and right.

Further, when the width of the required product sheet changes, the width of the roll base paper to be used is usually changed accordingly. In other words, when a narrow product sheet is required, a narrow roll paper is used, and when a wide product sheet is required, a wide roll paper is used. Does not occur.

[0010]

By the way, in the case of manufacturing a product sheet of a short order, if the roll base paper is changed each time, loss of the roll base paper or the like accompanying the order change may increase. In addition, if many types of roll base paper are possessed with a small width corresponding to the width of the product sheet, the number of types of stock base paper increases.

Therefore, in these cases, it may be more efficient to continuously produce product sheets of different dimensions using roll base paper having the same width as the old order. However, in this case, if the required width of the new order is smaller than that of the old order, as shown in FIG. 7, the trim width on the new order side becomes considerably large. 6 cannot be sucked.

Further, in the case of manufacturing a special cardboard sheet of a super-weight class, the trim 6 is difficult to be sucked by the trim shooter 7 even if the trim width is not excessively large due to its high rigidity, so that the trim 6 may not be processed. . In such a case,
In the conventional corrugating machine trim processing device, special trims such as wide trims and high-rigidity trims that are difficult to be sucked by the trim shooter 7 are conveyed to the trim shooter 7 as they are without suction processing, and cut at the cutoff 3. Then, after the sheet is conveyed to the stacker 5 together with the product sheet, a process such as manually discharging only the special trim outside the machine has been performed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and ensures a special trim such as a wide trim or a highly rigid trim which is difficult to be processed by a conventional trim processing device such as being hardly sucked by a trim shooter. It is an object of the present invention to provide a trim processing apparatus and a trim processing method for a corrugating machine, which can efficiently process.

[0014]

According to the first aspect of the present invention, there is provided a trim processing apparatus for a corrugating machine according to the present invention, which cuts a corrugated cardboard web supplied from a corrugator line in a running direction, and cuts the corrugated cardboard web in a width direction. A slitter capable of trimming unnecessary portions of both side end portions in the above, a guide means for guiding a special trim having a predetermined width or more generated by trimming with the slitter to the outside of the corrugator line, and a guide means guided by the guide means. And a waste disposal device for cutting the special trim.

According to a second aspect of the present invention, in addition to the above configuration, the trim processing apparatus for a corrugating machine according to the present invention is provided upstream of the waste processing apparatus and preliminarily controls the special trim sent to the waste processing apparatus. It is characterized in that a trim cutting device that cuts into a narrow width is provided. According to a third aspect of the present invention, in addition to the above configuration, the trim processing apparatus for a corrugating machine is characterized in that the special trim is generated in one direction in the corrugated cardboard web width direction.

According to a fourth aspect of the present invention, there is provided a trim processing apparatus for a corrugating machine according to the present invention, wherein the guide means is divided into at least two or more in the width direction of the special trim. Driving means for driving each of the slats. According to a fifth aspect of the present invention, in addition to the above configuration, the trim processing apparatus for a corrugating machine further includes auxiliary guide means for guiding the special trim to the waste processing apparatus in cooperation with the guide means. It is characterized by having.

According to a sixth aspect of the present invention, there is provided a method for trimming a corrugated board supplied from a corrugator line in a running direction.
In the trimming method for trimming unnecessary portions at both side ends in the width direction of the corrugated cardboard web and scraping the unnecessary portions, a special trim having a predetermined width or more is generated only on one side in the width direction of the corrugated cardboard web. The above-mentioned trimming is performed.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a trim processing apparatus and a trim processing method of a corrugating machine as one embodiment of the present invention. FIG. 1 is a side view of a downstream portion of the corrugating machine, and FIG. Top view, FIG. 3 is a sectional view of the trim cutting device, FIG.
1 is a top view of a corrugated cardboard web cut and scored by a slitter scorer. In FIGS. 1 to 4, the same parts as those of the above-described conventional trim processing apparatus of the corrugating machine are denoted by the same reference numerals.

The trim processing apparatus for a corrugating machine according to the present embodiment is provided downstream of the corrugating machine. Among these, the slitter scorer is for performing cutting and crease processing on a corrugated cardboard web conveyed on a processing line (corrugator line) of a corrugating machine. Further, the trim processing device is for processing trim generated by cutting the slitter scorer, and the present invention is to enable efficient and reliable trim processing of the corrugated cardboard web.

Therefore, in the corrugating machine according to the present embodiment, as shown in FIG. 1, each unit 2a, 2b of the slitter scorer 2 and the downstream of each slitter scorer unit 2a, 2b are the same as in the conventional example. Trim shooters 7a and 7b (indicated by reference numeral 7 when not individually distinguished), and cut-offs 3 provided downstream of these.
And a stacker 5 disposed further downstream. In addition to this, trimming by the slitter scorer 2 is performed immediately downstream of the trim shooter 7b provided downstream of the second unit 2b of the slitter scorer 2. Guide means 20 for guiding the special trim 6a having a predetermined width or more outside the corrugator line, a waste processing device (shredder) 61 for cutting and processing the special trim 6a guided by the guide means 20, and a waste processing device A trim trimming device 50 is provided upstream of the trimming device 61 for cutting the special trim 6a to be sent to the waste disposal device 61 into a slender shape in the width direction in advance.

As shown in FIGS. 1 and 2, the guide means 20 is disposed on one side in the width direction of the apparatus, and comprises a trim deflector 30 and a guide table 40. In the trim shooter 7, A special trim 6a such as a wide trim or a rigid trim that is difficult to be processed is provided outside the corrugator line for reliable processing.

The reason why the guide means 20 is disposed only on one side in the apparatus width direction of the corrugator line is that the special trim 6a is set to be generated only on this one side. Will be described later. As shown in FIG. 2, the trim deflector 30 is provided with frames 31, 31 installed at intervals in the apparatus width direction (the width direction of the corrugated cardboard web 1), and extends over the upstream side of the frames 31, 31. And a plurality of slats 33 having one end pivotally supported by the shaft 32 and arranged in the width direction of the apparatus. The other end of each slat 33 (the end on the downstream side in the traveling direction of the corrugated cardboard web 1) is swingable up and down, and each slat 33 is provided as a driving means (not shown) so as to be individually swingably driven. Connected to actuator. Thereby, as shown by a two-dot chain line in FIG. 1, an arbitrary set number of slats 33 can be swung upward as needed.

The guide table 40 comes in contact with the trim deflector 30 and is configured to convey the special trim 6 a sent from the trim deflector 30 to the trim cutting device 50. Here, since the trim cutting device 50 is disposed above the corrugator line of the corrugating machine, the guide table 40 guides the special trim 6a upward and transports the special trim 6a to the trim cutting device 50.

The trim cutting device 50 includes a guide table 4
The upper shaft 52 and the lower shaft 53 installed in the width direction on the frame 51 erected on the gantry 57 and installed on the downstream side of the
And As shown in FIG. 3, a knife head 5 is provided on each of the upper shaft 52 and the lower shaft 53 of the trim cutting device 50.
A plurality of blades 4 are arranged at appropriate intervals (for example, 50 mm), and a ring-shaped knife 55 is attached to each knife head 54, and is driven to rotate by a driving device (not shown).

Thus, when the special trim 6a sent to the trim cutting device 50 passes between the upper shaft 52 and the lower shaft 53, the special trim 6a is provided by the respective knives 55 provided on the upper shaft 52 and the lower shaft 53. The trim is cut along the traveling direction of the special trim 6a. The upper shaft 52 and the lower shaft 53 are connected to a driving device (not shown), and are driven to rotate so that the peripheral speed of the knife 54 of the upper shaft 52 and the lower shaft 53 is slightly faster than the traveling speed of the corrugated cardboard web 1. I have. The gantry 57 is provided so as to be appropriately supported on a floor surface, an apparatus, a building, or the like.

As shown in FIG. 1, the waste disposal device 61 is cut in the trim cutting device 50 in a narrow manner in a predetermined width along the traveling direction of the special trim 6 a, and is conveyed to the transfer table 60.
This is a device for further processing the special trim 6a sent through the. In addition, a guide roll 34 is provided in front of the slats 33 of the trim deflector 30 as auxiliary guide means that is extended in the width direction of the apparatus in the vicinity of the upper part of the travel path of the corrugated cardboard web 1. The guide roll 34 is separated from the special trim 6a by the trim deflector 30.
Is sent out of the corrugator line, the corrugated cardboard web 1 to be run on the corrugator line has a special trim 6a.
To prevent the corrugator line from leaving the corrugator line outside the corrugator line (in this case, to be lifted).
Cutting and crease processing can be performed stably.

In the slitter scorer 2 of the present trim processing apparatus, the corrugated cardboard web 1 is not processed symmetrically. The corrugated cardboard web 1 is set to be asymmetrically processed so as to generate only one side (here, the operation side of the corrugated machine) of the apparatus in the width direction of the apparatus in such a manner that a high-rigidity trim that is difficult to suction by the trim shooter 7 is generated only on one side in the apparatus width direction (here, the operation side of the corrugating machine). I have. Conversely, a trim that is narrow enough to be processed by the trim shooter 7 is generated on the other side in the apparatus width direction (here, the driving side of the corrugating machine).

For this reason, the guide means 20 provided on one side in the apparatus width direction processes the special trim 6a which cannot be processed by the trim shooter 7 provided on this one side. The special trim 6a is generated at a position corresponding to the width of the corrugated cardboard web 1. The trim trimming device 50 and the trim processing device 61 use the special trim 6a having the minimum width to the maximum width of the corrugated web 1 traveling on the corrugator line. (Usually about 1/2 of the maximum width) and special trim 6
a, the trim deflector 30 is used in FIG.
As shown in (1), it is provided with a predetermined width on one side in the device width direction.

The special trim 6a is provided with a sensor for detecting the running position and / or trim width of the special trim 6a.
It is preferable to provide a controller (control means) for controlling an actuator of the slat 33 so as to swing an appropriate number of slats 33 in accordance with the width of the special trim 6a when the slat 33 comes to the upstream portion of the special trim 6a. Alternatively, the operator may swing the appropriate number of slats 33 by a simple manual operation according to the width of the special trim 6a. It is also preferable to control the trim cutting device 50 and the waste processing device 61 so that the trim cutting device 50 and the waste processing device 61 operate in synchronization with the swing of the slat 33.

Since the trimming device of the corrugating machine according to one embodiment of the present invention is configured as described above, the trimming and scoring of the conventional corrugated cardboard web 1 as shown in FIG. When the corrugated cardboard sheet 4 is produced, that is, when the width of the trim 6 generated by the slitter scorer 2 is narrow, the slats 33 of the trim deflector 30 are set at the horizontal position indicated by the solid line, and as in the conventional case, the slitter scorer 2 The generated trim 6 is a trim shooter 7
And is processed by a shredder (dust treatment device) not shown.

As described above, when the trimming of the cardboard web 1 in the slitter scorer 2 results in a special trim 6a such as a wide trim or a highly rigid trim which is difficult to be processed by the trim shooter 7, the slitter scorer 2 is used. Is moved to one side (for example, the apparatus driving side) to reduce the trim width on one side (driving side) of the corrugated cardboard web 1 and widen the trim width on the other side (here, the operating side opposite to the driving side). Cut it. That is, the trim is cut asymmetrically with respect to the traveling direction when the cardboard web 1 is viewed from above.

Thereafter, the narrow trim 6 generated on the driving side in the slitter scorer 2 is sucked by the trim shooter 7 and then sent to a waste processing device (not shown) for processing, and the special trim generated on the operation side. 6a is conveyed out of the corrugator line by the trim deflector 30 of the guide means 20, and is separately cut. More specifically, in the trim deflector 30, an appropriate number of slats 33 are provided so as to correspond to the width of the special trim 6a.
Swings as shown by the two-dot chain line in FIG. 1, only the special trim 6a is guided out of the corrugator line, travels on the guide table 40 as shown by the one-dot chain line, and is fed into the trim cutting device 50. It is. Then, after being trimmed in the width direction by a predetermined width in advance along the traveling direction of the special trim 6a by the trim trimming device 50, the trimmed trimming device 50 is sent to the waste processing device 61 via the transport table 60, where it is further finely processed. .

Therefore, the trim generated by trimming the corrugated cardboard web 1 in the slitter scorer 2 of the corrugating machine is a special trim 6a such as a wide trim or a highly rigid trim which is difficult to be sucked or processed by the trim shooter 7. Even in this case, the processing can be surely performed. Further, the trim on the driving side of the corrugated cardboard web 1 in the slitter scorer 2 has a narrow width, and the trim on one operating side (opposite to the driving side) has a large width, so that the guide means 20 is provided only on the operating side. As a result, the special trim 6a can be surely processed while suppressing equipment costs.

Also, the required number of slats 33 corresponding to the width of the special trim 6a can be appropriately selected and tilted (oscillated), so that only the special trim 6a can be reliably transported out of the corrugator line and processed efficiently. can do.
Furthermore, even if the special trim 6a occurs, the trim cutting device 5
0 and the waste processing device 61, the stacker 5 can be automatically processed together with the product sheet.
It is not necessary to manually remove the special trim 6a transported to the special trim 6a, and the special trim 6a can be reliably processed by an unmanned person, so that labor saving and efficiency of work can be achieved.

When the special trim 6a is guided upward by the trim deflector 30, the guide roll 34 prevents the corrugated cardboard web 1 from floating together with the special trim 6a. Cutting and crease processing. Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and can be variously modified and implemented without departing from the spirit of the present invention.

For example, in this embodiment, the special trim 6a
Is generated on one side of the device, but the special trim 6
a may be generated on both sides of the apparatus, and the guide means 20 may be installed on both sides in accordance with that. In the present invention, the trim cutting device 50 is provided. However, the trim cutting device 50 may be omitted, and a waste processing device 61a having a performance of directly processing the special trim 6a may be directly provided via the transfer table 60a or the like. good.

Also, a chute 60b may be provided in contact with the trim cutting device 50 to change the discharge direction of the special trim 6a, and then the waste disposal device 61b may be disposed directly on the ground or under the ground (FIGS. 1, FIG. 2 is indicated by a two-dot chain line). Further, the special trim 6a may be conveyed to the stacker 5 together with the corrugated cardboard web 1 without the guide means 20, and may be manually removed therefrom. In this case, the special trim 6a is generated on one side of the apparatus. With this setting, the operator can process the special trim 6a only on one side of the apparatus, and can efficiently and reliably process the special trim 6a with a small number of hands.

In the present embodiment, the trim deflector 30 includes a plurality of slats 33, each of which is provided with an actuator. However, the plurality of slats 33 are formed into one slat, and the slat can be moved in the width direction of the apparatus. Provide an actuator to determine the position of the slat,
The position of the trim deflector 30 may be set according to the trim position.

[0039]

As described above in detail, according to the trimming apparatus for a corrugating machine according to the first aspect of the present invention, the corrugated web supplied from the corrugator line is cut in the running direction and the width of the corrugated web is reduced. A slitter capable of trimming unnecessary portions at both side ends in the direction, and a guide means for guiding a special trim having a predetermined width or more generated by trimming with the slitter to the outside of the corrugator line. Since the apparatus is provided so as to trim the special trim guided by the guide means, the special trim generated by the slitter can be guided to the outside of the corrugator line, and the special trim can be reliably processed.

According to the second aspect of the present invention, the trim cutting device is provided on the upstream side of the waste processing device, and the special trim sent to the waste processing device is elongated in the width direction in advance. Since it is provided so as to be cut, the processing load on the waste processing apparatus can be reduced, and the special trim can be reliably processed by the waste processing apparatus. According to the third aspect of the present invention, a special trim is generated in one side of the corrugated cardboard web in the width direction, so that devices such as a guide means and a waste disposal device may be installed on only one side. , Can contribute to cost reduction. Further, even when the special trim is conveyed to the stacker together with the corrugated cardboard sheet, the special trim can be removed on one side of the apparatus, so that the number of manpower can be reduced and the special trim can be efficiently processed.

According to the trim processing apparatus of the present invention, the guide means includes a slat divided into at least two or more in the width direction of the special trim;
Since the driving means for driving each slat is provided, the slat can be selectively driven according to the width of the special trim, and the special trim can be reliably guided out of the corrugator line.

According to the fifth aspect of the present invention, the auxiliary guide means prevents the corrugated cardboard web from rising and cooperates with the guide means to transfer the special trim to the waste processing apparatus. Since the guiding is performed, stable cutting and scoring of the corrugated cardboard web can be performed by the slitter scorer, and the corrugated cardboard web can be guided to a predetermined traveling route, and the special trim can be reliably guided outside the corrugator line.

According to the trimming method for a corrugating machine of the present invention, the corrugated fiberboard web supplied from the corrugator line is cut in the running direction.
In the trimming method of trimming unnecessary portions at both side edges in the width direction of the corrugated cardboard web and removing unnecessary portions, trimming is performed so that a special trim having a predetermined width or more is generated only on one side in the width direction of the corrugated cardboard web. Therefore, devices such as a guide unit and a waste disposal device need only be installed on one side, which can contribute to cost reduction. Further, even when the special trim is conveyed to the stacker together with the corrugated cardboard sheet, the special trim can be removed on one side of the apparatus, so that it is possible to reduce labor and efficiently process the special trim.

[Brief description of the drawings]

FIG. 1 is a side view showing a trim processing device of a corrugating machine as one embodiment of the present invention.

FIG. 2 is a top view showing a trim processing device of the corrugating machine as one embodiment of the present invention.

FIG. 3 is a cross-sectional view of a trim cutting device provided in the trim processing device of the corrugating machine as one embodiment of the present invention.

FIG. 4 is a top view showing cutting and crease processing in a slitter scorer of a corrugating machine as one embodiment of the present invention.

FIG. 5 is a side view showing a device configuration after a slitter scorer of a conventional corrugating machine.

FIG. 6 is a top view showing cutting and crease processing in a slitter scorer of a conventional corrugating machine.

FIG. 7 is a top view showing cutting and crease processing in a slitter scorer of a conventional corrugating machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Corrugated cardboard web 2 Slitter scorer 2a 1st unit 2b 2nd unit 3 Cutoff 4 Corrugated cardboard sheet 5 Stacker 6 Trim 6a Special trim 7,7a, 7b Trim shooter 20 Guide means 30 Trim deflector 31 Frame 32 Shaft 33 Slat 34 Auxiliary guide means (Guide Roll) 40 Guide Table 50 Trim Cutting Device 51 Frame 52 Upper Shaft 53 Lower Shaft 54 Knife Head 55 Knife 57 Mount 60, 60a Transfer Table 60b Chute 61, 61a, 61b Debris Handling Device (Shredder) SL Cutting Line CL Ruled Line

Claims (6)

[Claims] 1. A slitter capable of cutting a corrugated cardboard web supplied from a corrugator line in a running direction and trimming unnecessary portions at both side ends in a width direction of the corrugated cardboard web, and trimming with the slitter. A corrugating machine comprising: guide means for guiding a special trim having a predetermined width or more outside a corrugator line; and a waste disposal device for cutting and processing the special trim guided by the guide means. Trimming equipment. 2. A trim cutting device which is provided upstream of the waste processing apparatus and which cuts the special trim sent to the waste processing apparatus into a narrow width in advance in a width direction. 3. The trim processing device of the corrugated machine according to 1. 3. The corrugated cardboard web according to claim 1, wherein the special trim is generated in one direction in a width direction of the corrugated cardboard web.
A trim processing device for the corrugated machine according to the above. 4. The guide means comprises slats divided into at least two or more in the width direction of the special trim, and drive means for driving each of the slats. 4. The trim processing device for a corrugating machine according to any one of items 1 to 3, wherein 5. The apparatus according to claim 1, further comprising auxiliary guide means for guiding said special trim to said waste disposal device in cooperation with said guide means. Trim processing equipment for corrugated machines. 6. A trim processing method for cutting a corrugated cardboard web supplied from a corrugator line in a traveling direction, trimming unnecessary portions at both side ends in a width direction of the corrugated cardboard web, and scraping the unnecessary portions. A trimming method for a corrugating machine, wherein the trimming is performed so that a special trim having a predetermined width or more is generated only on one side in a width direction of the corrugated cardboard web.