JP2001001430A - Manufacture of corrugated fiberboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a high strength double-faced corrugated fiberboard under the state that the increase of its manufacturing cost is checked by a method wherein the easy addition of a process for pasting a third liner board to an existing device for manufacturing a double-faced corrugated fiberboard out of a first liner board and a second liner board is realized. SOLUTION: For this corrugated fiberboard, a single-faced corrugated fiberboard 14 is formed by pasting a corrugating medium 11 to one side of a first liner board 13 with a single-faced corrugated fiberboard forming device. A third liner board 31 is charged between the single-faced corrugated fiberboard 14 and a second liner board 27 from the upstream position of a double-faced corrugated fiberboard forming device 6 so as to paste the single-faced corrugated fiberboard 14 and the second liner board 27 through the third liner board 31 with the double-faced corrugated fiberboard forming device 6. The third liner board 31 is charged from the direction intersecting the paper feeding directions of the single-faced corrugated fiberboard 14 and of the second liner board 27 after being converted to the same paper feeding directions of the single-faced corrugated fiberboard 14 and of the second liner board 27 with a turning bar.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing corrugated cardboard, and more particularly, to a method for manufacturing corrugated cardboard in which one side of a double-faced cardboard is constituted by a pair of liners.

[0002]

2. Description of the Related Art In general, as shown in FIG. 6A, a corrugated cardboard in which a rectangular tubular body 50 is closed by lid flaps 51, 52, 53, 54 and bottom flaps 55, 56, 57, 58. Box A is known. This type of cardboard box A,
As shown in FIG. 6B, it is formed by assembling corrugated paperboard B punched into a rectangular shape.

The corrugated paperboard B is provided on side walls 59, 60, 61, 62, which are continuously provided via fold lines a, b, c, and upper and lower edges of the side walls 59, 60, 61, 62, respectively. Lid flaps 51, 52, which are connected via fold lines d and e,
53, 54 and bottom flaps 55, 56, 57, 58. When assembling the cardboard box A, each of the side walls 59, 60, 61, 6 of the cardboard paperboard B is used.
2 is folded through each of the fold lines a, b, c, and one side wall plate 5
An adhesive piece 63 connected to the side wall 9 is adhered to a side end of the other side wall plate 62 to form a square tubular body 50.

Further, in the corrugated paperboard B, in order to improve the strength of the body 50, the front liner 27 at the position to be the side wall plates 59, 60, 61, 62 constituting the body 50 is stepped. The reinforcing liner 31 is interposed between the core 11 and the core 11.

[0005] This type of corrugated paperboard B is manufactured by a so-called corrugating machine. The corrugating machine generally includes a first single-sided corrugated cardboard forming apparatus for forming an A-stage single-sided corrugated cardboard and a second single-sided cardboard for forming a B-stage single-sided corrugated cardboard.
Single-sided corrugated cardboard forming device and single-sided corrugated cardboard with front liner 2
A plurality of apparatuses, such as a double-sided corrugated cardboard forming apparatus that forms a double-sided corrugated cardboard by laminating 7, are arranged in a straight line along the paper feed direction of each liner. For this reason, it is known that this type of corrugating machine has an extremely long overall length and a large-scale configuration.

[0006] In order to form a corrugated paperboard B in which the front liner 27 and the stepped core 11 are bonded via the reinforcing liner 31 by such a corrugating machine, the reinforcing liner 31 is supplied to the corrugating machine. It is conceivable to add equipment.

However, when the reinforcing liner 31 is interposed between the front liner 27 and the stepped core 11, the front liner 2
7 and the reinforcing liner 3 in the same direction as the feeding direction of the stepped core 11.
1 has to be fed, and the total length of the corrugating machine is further increased. In addition, since a corrugating machine having a device for loading the reinforcing liner 31 has to be newly constructed, enormous costs are required and the manufacturing cost of the corrugated paperboard B is increased.

[0008]

SUMMARY OF THE INVENTION In order to solve such a disadvantage, the present invention simplifies the process of introducing a third liner into an existing apparatus for producing double-faced cardboard from a first liner and a second liner. It is an object of the present invention to provide a method of manufacturing a corrugated cardboard, which is capable of manufacturing a double-sided corrugated cardboard with high strength while suppressing an increase in manufacturing cost.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a strip-shaped single-sided cardboard formed by attaching a stepped core to one side of a first liner by a single-sided cardboard forming apparatus. Feeding in the longitudinal direction and feeding the double-sided cardboard forming apparatus, and feeding the second liner in the longitudinal direction and feeding the same into the double-sided cardboard forming apparatus. A method for producing a double-faced cardboard by adhering the second liner to a stepped core, wherein a predetermined position between the single-sided cardboard and the second liner is located upstream of the double-faced cardboard forming apparatus. And a step of attaching the single-sided cardboard and the second liner through the third liner by the double-sided cardboard forming apparatus,
In the charging step of the third liner, the third liner is provided at a position upstream of the double-sided corrugated cardboard forming apparatus from a direction intersecting the paper-supplying direction of the single-sided corrugated cardboard and the second liner. Feed paper toward the direction changing means,
The feeding direction changing means changes the feeding direction of the third liner to the same direction as the feeding direction of the single-sided cardboard and the second liner, and moves the third liner toward the double-faced cardboard forming apparatus. It is characterized by being supplied.

[0010] According to the present invention, first, a stepped core is adhered to one surface of the first liner by the single-sided cardboard forming apparatus to form a single-sided cardboard. Next, the single-sided cardboard is put into the double-sided cardboard forming apparatus, and the second liner is put into the double-sided cardboard forming apparatus. On the other hand, a third liner is fed into the double-faced corrugated cardboard forming apparatus via the paper feeding direction changing means provided at the upstream position. Thereafter, the single-faced cardboard put into the double-faced cardboard forming apparatus and the second liner are bonded via a third liner. In this way, by inserting the third liner together with the single-sided corrugated cardboard and the second liner from the upstream of the double-sided corrugated cardboard forming apparatus, it is not necessary to attach the third liner to the second liner in advance. The third liner can be securely interposed between the single-faced cardboard and the second liner for bonding.

In the third liner charging step, first, the third liner is fed from a direction intersecting the feeding direction of the single-faced cardboard and the second liner.
The third liner is converted by the sheet feeding direction changing means in the same direction as the sheet feeding direction of the single-sided cardboard and the second liner at an upstream position of the double-faced cardboard forming apparatus. Thus, for example, by simply providing the paper feeding direction changing means in an existing device such as a corrugating machine, the third liner is interposed from the side in the paper feeding direction of the single-sided cardboard or the second liner. Thus, the third liner charging step can be added very easily while preventing an increase in cost.

Further, in the present invention, the paper feeding direction changing means reverses the single lined cardboard and the third liner fed from a direction intersecting the paper feeding direction of the second liner, and And a guide roller that is inclined in a direction to guide the third liner thus formed in a direction in which the single-sided cardboard and the second liner are fed.

Since the sheet feeding direction changing means changes the sheet feeding direction of the third liner by the guide roller whose axis is inclined, the sheet feeding direction can be smoothly changed with an extremely simple configuration. . Further, since the guide roller changes the sheet feeding direction by reversing the third liner, the direction of the third liner can be changed in a relatively small space. When the roller is mounted, it can be easily mounted even if the mounting space is relatively small.

[0014]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing a schematic configuration of a corrugating machine including the apparatus of the present embodiment, FIG. 2 is an explanatory view schematically showing a configuration of a single-sided corrugated cardboard forming apparatus, and FIG. 3 is a schematic view of a configuration of a main part of the present embodiment. FIG. 4 is an explanatory view showing the sheet feeding direction changing means in plan view, FIG. 5 is an explanatory view showing a strip-shaped double-faced cardboard bonded and discharged by the double-faced cardboard forming apparatus, and FIG. a) is a perspective view of a cardboard box,
FIG. 6B is a development view of the cardboard box of FIG. 6A.

In the corrugating machine 1 shown in FIG. 1, a plurality of liners are bonded together to form a strip of corrugated cardboard, and then punched into a predetermined shape to form a corrugated cardboard box paperboard B shown in FIG. 6 (b).
Is formed.

In the corrugating machine 1 of FIG. 1, reference numeral 2 denotes a first single-sided corrugated cardboard forming apparatus (A-stage single facer);
3 is a second single-sided cardboard forming device (B-stage single facer), 4 is a preheating device (preheater), 5 is an adhesive coating device (glue machine), 6 is a double-sided cardboard forming device (double facer), and 7 is a slitter / scorer. , 8 are cutting devices.

The first single-sided corrugated cardboard forming apparatus 2 forms an A-stage (Japanese Industrial Standard 32-stage / 36-stage / 30 cm) on the core paper 10 supplied from the core roll stand 9, and is formed at this time. The stepped core 11 (see FIG. 2) is attached to the back liner 13 supplied from the back liner roll stand 12 to form an A-stage single-sided cardboard 14. That is, the first
As shown in FIG. 2, the single-sided corrugated cardboard forming apparatus 2 uses a pair of corrugated rollers 15 and 16 for forming the corrugated paper A to form the core paper 10.
Is formed on the back liner 13 by a press roller 18 after applying an adhesive through an adhesive applying roller 17. As shown in FIG. 1, the A-stage single-sided cardboard 14 formed by the first single-sided cardboard forming device 2 is fed downstream along a sheet feeding path 20 via a feeding device 19.

The second single-sided corrugated cardboard forming apparatus 3 applies the B core paper 22 supplied from the core roll stand 21 to B
Forming steps (Japanese Industrial Standards 48 steps-52 steps / 30 cm)
The stepped core formed at this time is adhered to the center liner 24 supplied from the center liner roll stand 23 to form a B-stage single-sided cardboard 25. The B-stage single-sided corrugated cardboard 25 is used when manufacturing a so-called double-sided corrugated cardboard, and is included in the general configuration of the corrugating machine 1. In the present embodiment, It is assumed that the second single-sided cardboard forming apparatus 3 is not operated.

The preheating device 4 includes an A-stage single-sided cardboard 14 formed by the first single-sided cardboard forming device 2.
And the front liner 27 supplied from the front liner roll stand 26 are heated and sent downstream. The preheating device 4
As shown in FIG. 3, the first heating roller 28 for heating the A-stage single-sided cardboard 14 and the B-stage single-sided cardboard 2
Second heating roller 29 for heating 5 (see FIG. 1 phantom line)
And a third heating roller 30 for heating the front liner 27. The A-stage single-faced corrugated cardboard 14 and the front liner 27 heated by the preheating device 4 are put into the adhesive coating device 5 provided on the downstream side thereof.

Here, as shown in FIGS. 1 and 3, a reinforcing liner 31 (3) is provided between the preheating device 4 and the adhesive coating device 5.
2) is input. The reinforcing liner 31 (32) is drawn out from the roll-shaped reinforcing liner rolls 34 and 35 supported by the reinforcing liner roll stand 33, and is orthogonal to the sheet feeding direction of the A-stage single-sided cardboard 14 and the front liner 27. Supplied from the direction. And, as shown in FIG.
The reinforcing liners 31 and 32 are fed by a sheet feeding direction changing unit 36 provided between the preheating device 4 and the adhesive application device 5.
From the direction perpendicular to the feeding direction of the A-stage single-sided cardboard 14 and the front liner 27, the A-stage single-sided cardboard 14 and the front liner 2
7 is converted into the same direction as the sheet feeding direction.

The paper feeding direction changing means 36 includes guide rollers 39 and 40 mounted on a frame 37 of the preheating device 4 via a support member 38. The guide roller 3
9, 40, the axis of the rotation axis is the reinforcing liner 31,
It is provided inclining corresponding to the 32 guiding directions. As a result, the reinforcing liners 31 and 32 are guided by the guide rollers 39 and 4.
The angle A (90 ° in the present embodiment) is inverted through 0, whereby the direction is changed to the sheet feeding direction of the A-stage single-sided cardboard 14 and the front liner 27. As described above, in the present embodiment, the feeding direction changing means 36 is connected to the preheating device 4.
The reinforcement liners 31 and 32 can be easily added and supplied simply by attaching between the adhesive and the adhesive application device 5. In particular, in a machine equipped with the second single-sided corrugated cardboard forming device 3 like the corrugating machine 1 of the present embodiment shown in FIG.
32 can be put into the adhesive application device 5,
It is possible to eliminate the need to change the entire configuration of the corrugating machine 1 only by adding the paper feeding direction changing means 36 partially.

In this manner, the reinforcing liners 31, 32 supplied between the A-stage single-faced cardboard 14 and the front liner 27
The single-sided corrugated cardboard 14 and the front liner 27 are put into the adhesive coating device 5. As shown in FIG. 3, the adhesive application device 5 includes a first application roller 41 that applies an adhesive to the stepped core 11 of the A-stage single-sided corrugated cardboard 14, a reinforcing liner 31,
A second application roller for applying an adhesive to the lower surface of the second application roller.

The A-side single-sided cardboard 14 to which the adhesive is applied by the adhesive applying device 5 and the reinforcing liner 3
1 and 32 are put into the double-faced corrugated cardboard forming apparatus 6 together with the front liner 27. In the double-faced corrugated cardboard forming apparatus 6, as shown in FIG.
After being guided along with the double-sided corrugated cardboard 44
Is formed. As shown in FIG. 5, the double-faced corrugated cardboard 44 formed in this way has a predetermined position, that is, as shown in FIG. The reinforcing liners 31, 32 can be accurately bonded to the position where the trunk 50 of the cardboard box A shown in FIG. 6A is formed. FIG.
In FIG. 6, a portion indicated by a virtual line indicates a portion where the corrugated paperboard B shown in FIG. 6B is formed. In the present embodiment, a pair of corrugated paperboard B in the width direction of the double-faced corrugated cardboard 44 is provided by the slitter / scorer 7.
Is formed by cutting.

Thereafter, as shown in FIG. 1, each corrugated paperboard B cut and formed by the slitter / scorer 7 is divided by the cutting device 8 provided downstream of the corrugated paperboard B. It is stored in a stacked state by the provided stacking storage section (auto stacker) 45.

As shown in FIG. 6 (b), the corrugated paperboard B formed as described above has side walls 59, 60, 6
A reinforcing liner 31 (32) is interposed between the front liner 27 and the stepped core 11 of the first and second cores 62, and as shown in FIG. 50
Can be formed.

In this embodiment, as shown in FIG. 4, in order to supply a pair of reinforcing liners 31, 32 in two rows, a sheet feeding direction changing means 36 having a pair of guide rollers 39, 40 is provided. Although shown, the present invention is not limited to this, and it goes without saying that, for example, the number of guide rollers can be increased or decreased according to the number of reinforcing liners.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a schematic configuration of a corrugating machine including an apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory view schematically showing the configuration of a single-sided cardboard forming apparatus.

FIG. 3 is an explanatory view schematically showing a configuration of a main part of the embodiment.

FIG. 4 is an explanatory view showing a sheet feeding direction changing unit in plan view.

FIG. 5 is an explanatory view showing a strip-shaped double-faced cardboard bonded and discharged by the double-faced cardboard forming apparatus.

6A is a perspective view of a cardboard box, and FIG. 6B is a view of FIG.
Exploded view of a cardboard box.

[Explanation of symbols]

2 1st single-sided corrugated board forming apparatus (single-sided corrugated board forming apparatus), 6 ... double-sided corrugated board forming apparatus, 11 ... core with step, 1
3 ... Back liner (first liner), 14 ... A single-sided cardboard (single-sided cardboard), 27 ... Front liner (second liner), 31, 32 ... Reinforced liner (third liner), 36
... sheet feeding direction changing means, 39, 40 ... guide rollers, 44 ...
Double-sided cardboard.

Claims (2)

[Claims] A single-faced corrugated cardboard formed by sticking a stepped core on one side of a first liner by a single-faced corrugated cardboard forming apparatus is fed in the longitudinal direction thereof and fed into a double-faced corrugated cardboard forming apparatus. And, the second liner is fed in the longitudinal direction thereof and put into the double-faced cardboard forming apparatus, and the double-sided cardboard forming apparatus sticks the second liner to the stepped core of the single-sided cardboard. A method of manufacturing a corrugated cardboard for forming a double-faced corrugated cardboard, comprising: a step of charging a third liner at a predetermined position between the single-sided corrugated cardboard and a second liner at an upstream position of the double-faced corrugated cardboard forming apparatus; Adhering the single-sided cardboard and the second liner via the third liner, wherein the third liner is inserted into the single-sided corrugated board in the third liner charging step. And the direction intersecting the sheet feeding direction of the second liner, and the paper feed towards the sheet feed direction changing means provided upstream position of the double-sided corrugated cardboard forming apparatus,
The feeding direction changing means changes the feeding direction of the third liner to the same direction as the feeding direction of the single-sided cardboard and the second liner, and moves the third liner toward the double-faced cardboard forming apparatus. A method for producing corrugated cardboard, characterized in that the corrugated cardboard is supplied. 2. The sheet feeding direction changing means inverts the single-faced cardboard and the third liner fed from a direction intersecting the sheet feeding direction of the second liner. 3 with the single-sided cardboard and the second liner.
2. The method for manufacturing corrugated cardboard according to claim 1, further comprising a guide roller that is inclined in a direction to guide the liner toward the sheet feeding direction.