JP2009125998A - Corrugated board, method and apparatus for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the strength by making the tube longitudinal direction of stripe shaped tubular hollow part formed by a liner sheet of a corrugated board and a center core (corrugated sheet) be orthogonally cross, and improve the strength of the corrugated board by overlapping a plurality sheets of one surface corrugated board or both surfaces corrugated board and making the tube longitudinal direction of the tubular hollow part be orthogonally cross. <P>SOLUTION: The tabular surface liner sheet 1 composing the outermost surface, a back surface liner sheet 2, and two corrugated plate-like corrugated sheets 3, 4 where the wave advancing direction composing the center core sandwiched between the front and back surface liner sheets 1, 2 are orthogonal with each other are laminated. A liner sheet 5 is laminated between the two corrugated plate-like corrugated sheets 3, 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a box used for transporting and storing various articles, a cardboard made of paper used for a partition used in the box, or other structures, and a manufacturing method and apparatus thereof. .

  In general, a corrugated cardboard is a flat plate facing each other so that the core is sandwiched between one core (corrugated sheet) made of a material mainly made of corrugated paper having a wave traveling direction in a certain direction. The two liner sheets are stacked and bonded together.

  The corrugated cardboard having such a structure is formed by a plurality of cylinders formed between two liner sheets facing each other, with a liner sheet and a core bent in a wave shape (crest and trough) having a wave traveling direction in a certain direction. The corrugated board and the cylindrical space (cylindrical hollow part) are formed in stripes in parallel lines, and the corrugated cardboard having such a configuration is frequently used to protect articles such as a transport box from an impact. Moreover, it is used also for the partition which prescribes | regulates arrangement | positioning of articles | goods in a box.

  Such a corrugated cardboard is bent in a direction parallel to the length direction of the cylindrical portion, although its bending strength is strong with a direction perpendicular to the length direction of the cylindrical portion formed by the liner sheet and the core as a bending line. The bending strength of the line tends to be relatively weak.

  Therefore, the liner sheet and the core (corrugated sheet) constituting the corrugated cardboard are alternately overlapped, and the core is disposed so that the stripe direction (cylinder length direction) of the cylindrical portion is perpendicular to each other. Patent Document 1 proposes a corrugated cardboard material whose bending strength is enhanced by the above. This corrugated cardboard material is composed of a plurality of cardboards (single-sided corrugated cardboard) in which a liner sheet is arranged only on one side of the core, and the liner sheet and the core are alternately stacked, and the strip direction of the cylindrical part of the core Are attached to each other at right angles.

  In addition, a plurality of cardboards (double-sided cardboard) in which liner sheets are arranged on both sides of the core are arranged so that the liner sheets overlap each other and the stripe directions of the cylindrical portions of the core are alternately orthogonal to each other. Corrugated cardboard formed by bonding has also been proposed.

  However, in the corrugated cardboard formed by stacking a plurality of single-sided cardboards so that the liner sheet and the core are in contact with each other so that the length direction of the cylindrical portion of the core is orthogonal, one outermost surface (main surface) is Even if the liner sheet is not arranged, the liner sheet is not bonded, and the longitudinal direction of the cylindrical part of the core is formed orthogonally, the peak (or valley) of the core The bending strength of the corrugated cardboard whose bending line is in the direction parallel to the length direction of the cylindrical portion is weak, and sufficient strength cannot be given to the box formed using the corrugated cardboard.

  Also, in the case of corrugated cardboard in which a plurality of double-sided corrugated cardboards are overlapped with the length of the cylindrical portion of the core perpendicular to each other, the liner sheets at the bonded portions overlap each other. Tend to increase.

The prior art documents related to the present invention are described below.
JP 2000-334865 A

  The present invention improves strength by orthogonalizing the tube length direction of a striped cylindrical hollow portion formed by a liner sheet and a core (corrugated sheet) constituting a corrugated cardboard, and a plurality of single-sided cardboards. Alternatively, the above-described problems of the conventional cardboard in which the strength of the cardboard is improved by superimposing double-sided cardboards to make the cylinder length direction of the cylindrical hollow portion orthogonal.

  The invention according to claim 1 of the present invention is a sheet-like surface liner sheet and a back liner sheet constituting the outermost surface, and two corrugated sheets constituting an inner core sandwiched between the front and back liner sheets. The corrugated sheets are laminated, and the wave traveling directions of the two corrugated sheet corrugated sheets are orthogonal to each other.

  The invention according to claim 2 of the present invention is the corrugated cardboard according to claim 1, wherein a liner sheet is laminated between the two corrugated sheet corrugated sheets.

The invention according to claim 3 of the present invention is
a) first and second liner sheet supply steps of supplying a flat plate-like first liner sheet and a second liner sheet in the same direction so that their sheet surfaces face each other;
b) A corrugated first corrugated sheet whose wave traveling direction is orthogonal to the sheet supply direction of the first and second liner sheets, and a corrugated second corrugated sheet whose wave traveling direction is parallel. First and second corrugated sheet molding steps to be molded;
c) After the first and second corrugated sheet forming steps, the first and second corrugated sheets whose wave traveling directions are orthogonal are supplied between the first and second liner sheets, and the first liner A laminate production step of producing a laminate comprising a sheet, a first corrugated sheet, a second corrugated sheet, and a second liner sheet;
d) a laminating step of bonding the produced laminate through an adhesive;
Is a corrugated board manufacturing method.

  The invention according to claim 4 of the present invention is the corrugated board manufacturing method according to claim 3, wherein the liner sheet supply step is between the first and second corrugated sheets supplied by the corrugated sheet supply step. A corrugated board manufacturing method comprising an intermediate liner sheet supplying step for supplying a flat liner sheet.

  According to a fifth aspect of the present invention, there is provided a liner sheet supply means for supplying a flat plate-like first liner sheet and a second liner sheet in the same direction so that their sheet surfaces face each other; The corrugated sheet supplying means supplies the corrugated first corrugated sheet and the second corrugated sheet with their wave traveling directions orthogonal to each other between the opposing two liner sheets. The first corrugated sheet forming portion for forming a corrugated first corrugated sheet whose wave traveling direction is orthogonal to the sheet supply direction of the first and second liner sheets, and a corrugated sheet whose wave traveling direction is parallel. A second corrugated sheet forming portion for forming a second corrugated sheet having a shape, and the first and second liner sheets are provided at the subsequent stage of the first and second corrugated sheet forming portions. The first the supplied wave traveling direction are orthogonal between a facer, characterized in that it comprises a laminate means for bonding the second corrugated sheet.

The invention according to claim 6 of the present invention is the corrugated board manufacturing apparatus according to claim 5, wherein each of the first and second corrugated sheet forming portions of the corrugated sheet supply means includes a plurality of corrugators along the corrugated sheet supply direction. Is a corrugated board manufacturing apparatus.

  The invention according to claim 7 of the present invention is the corrugated board manufacturing apparatus according to claim 6, wherein the corrugator sequentially waves the supplied corrugated sheet from the sheet width center portion toward both outer sides in the width direction. It is the corrugated board manufacturing apparatus arranged so that it may shape | mold in plate shape.

  The invention according to claim 8 of the present invention is the corrugated board manufacturing apparatus according to any one of claims 5 to 7, wherein the liner sheet supply means is two corrugated sheets supplied by the corrugated sheet supply means. A corrugated board manufacturing apparatus comprising an intermediate liner sheet supply means for supplying a single liner sheet between the two.

  According to the corrugated cardboard of the present invention, one corrugated cardboard is constituted by two flat sheet liner sheets and two corrugated sheet cores (corrugated sheets), and the two liners The two cores sandwiched (adhered) to the sheet are perpendicular to each other in the length direction of the cylindrical hollow portion on the front and back sides of the corrugated cardboard, are thin, have high bending strength, and It has a cardboard structure that is lightened.

  According to the corrugated board manufacturing method of the present invention, one flat corrugated board is constituted by two flat liner sheets and two corrugated cores (corrugated sheets). It is possible to efficiently produce corrugated cardboard having a structure in which the core lengths of the cylindrical hollow portions are orthogonal to each other on the front and back sides of the corrugated cardboard between the two cores sandwiched (attached). Yes, it is possible to efficiently manufacture a corrugated cardboard having a high bending strength in-line.

  According to the corrugated board manufacturing apparatus of the present invention, a single corrugated board is constituted by two flat sheet liner sheets and two corrugated cores (corrugated sheets). It is possible to efficiently produce corrugated cardboard having a structure in which the core lengths of the cylindrical hollow portions are orthogonal to each other on the front and back sides of the corrugated cardboard between the two cores sandwiched (attached). Yes, all in-line and corrugated cardboard with high bending strength can be efficiently manufactured.

  Thus, according to the present invention, two corrugated sheet cores are sandwiched and overlapped with two flat sheet liner sheets constituting a single cardboard. The cylindrical hollow portions on the front and back sides of the corrugated cardboard are orthogonal to each other, and the same bending strength can be achieved in the two orthogonal cylinder length directions. In addition, the corrugated board of the present invention has the same bending strength in two orthogonal cylinder length directions, and can be thinner and lighter than the conventional one.

  An embodiment of the corrugated board of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an external perspective view of the corrugated board of the present invention, and a flat surface liner sheet 1 constituting the outermost surface of the corrugated cardboard. A corrugated sheet 3, 4 having a back liner sheet 2 and having two crests and troughs bent in a corrugated shape is sandwiched between the front and back liner sheets 1, 2. And the surface liner sheet 1, the corrugated sheet 3, the corrugated sheet 4, and the back surface liner sheet 2 are laminated | stacked in this order, and are affixed with the adhesive agent.

Between the flat surface liner sheet 1 and the corrugated sheet corrugated sheet 3 overlapped, a striped cylindrical hollow in a direction perpendicular to the wave traveling direction of the corrugated sheet 3 Part 3a is formed. In addition, between the flat plate-like back liner sheet 2 and the corrugated sheet corrugated sheet 4 superimposed, a striped tube is formed in a direction orthogonal to the wave traveling direction of the corrugated sheet corrugated sheet 4. A hollow portion 4a is formed.

  Each of the corrugated sheets 3 and 4 having a corrugated sheet sandwiched between two liner sheets 1 and 2 is formed by crossing the cylinder length directions of the respective cylindrical hollow portions 3a and 4a. It is sandwiched between 1 and 2. The crossing angle is preferably crossed within a range of 45 ° to 90 °.

  The corrugated sheets 3 and 4 preferably have the same or similar corrugated wavelength and amplitude, but are not particularly limited in the present invention. The sheet material of the liner sheets 1 and 2 and the corrugated sheets 3 and 4 may be paper or a composite sheet with a resin film (or resin coating film) mainly composed of paper. Further, the sheet thickness and stiffness (stretch strength) of the liner sheets 1 and 2 and the corrugated sheets 3 and 4 are not particularly limited.

  The corrugated cardboard of the present invention is further provided between the two corrugated sheets 3 and 4 sandwiched between the two liner sheets 1 and 2 shown in FIG. A liner sheet 5 having a thinner or appropriate thickness may be laminated.

  FIG. 2 is a perspective view illustrating the corrugated board manufacturing method and apparatus thereof according to the present invention. The corrugated board manufacturing method and apparatus according to the present invention will be described. First, in the liner sheet supplying step, the liner sheet supplying means 11 The long (web-shaped) flat liner sheet 1 (front liner sheet) and the liner sheet 2 (back liner sheet) are supplied in the same direction so that their sheet surfaces face each other.

  Then, in the corrugated sheet supplying step, the corrugated sheet supplying means 21 causes the corrugated sheet supplying means 21 to place the corrugated sheet-like two corrugated sheets 3 and 4 between the two liner sheets 1 and 2 facing each other. Supply at right angles.

  Thereby, between the flat surface liner sheet 1 and the back surface liner sheet 2 constituting the outermost surface of the corrugated cardboard, the corrugated sheets 3, 4 having two crests and troughs bent in a corrugated shape, The wave traveling directions are held perpendicular to each other, and the front liner sheet 1, the corrugated sheet 3, the corrugated sheet 4, and the back liner sheet 2 are laminated in this order to obtain a laminated body.

  And the obtained laminated body is stuck by an adhesive agent etc. in a lamination process after that, and the cardboard of this invention is manufactured.

  A corrugated board manufacturing method and a manufacturing apparatus for manufacturing the corrugated board of the present invention will be described below in detail according to an embodiment with reference to FIG.

  First, in the first and second liner sheet supply steps, the first liner sheet supply means 11 and the second liner sheet supply means 11 cause the flat plate-like first liner sheet 1 and second liner sheet 2 to pass through each other. The sheets are fed in the same direction so that the sheet surfaces face each other.

Subsequently, in the first and second corrugated sheet forming steps, the corrugated sheet having a wave traveling direction orthogonal to the sheet supply direction of the first and second liner sheets 1 and 2 by the first corrugated sheet forming means 25. The second corrugated sheet corrugated sheet 2 is formed by the second corrugated sheet forming means 27 and the wave traveling direction is parallel to the sheet feeding direction of the first and second liner sheets 1 and 2. Each sheet 4 is molded.

  Subsequently, after the first and second corrugated sheet forming steps, in the laminate manufacturing step, the first and second wave traveling directions are orthogonal between the first and second liner sheets 1 and 2. The corrugated sheets 3 and 4 are supplied, and a laminate including the first liner sheet 1, the first corrugated sheet 3, the second corrugated sheet 4, and the second liner sheet 2 is produced.

  Subsequently, in the laminating process, the laminated body produced in the laminated body producing process is bonded through an adhesive.

  An embodiment of the corrugated board manufacturing apparatus according to the present invention will be described with reference to the schematic side view shown in FIG. 3. The first liner sheet 1 and the second liner sheet that are long (web-shaped) and have a flat plate shape. 2, a pair of upper and lower liner sheet supply means 11 and 11 (unwinding part) for supplying and unwinding in the same direction so that their sheet surfaces face each other, and the first and second liner sheets 1 and 2, A pair of upper and lower corrugated sheets that are long (web-shaped) and corrugated plate-like first corrugated sheet 3 and second corrugated sheet 4 are unwound and fed out with their wave traveling directions orthogonal to each other. Supply means 21 (unwinding part) is provided.

  In the unwinding and feeding direction of the first liner sheet 1 and the second liner sheet 2 by the pair of upper and lower liner sheet supply means 11, 11, a pair of upper and lower direction guide rolls 31 and 31, respectively, And a laminating roll 33 (laminating roll).

  Adhesive layers (for example, a heat-sensitive adhesive layer) are provided in advance on the mutually facing inner surfaces of the first liner sheet 1 and the second liner sheet 2 to be fed out. In the case where the adhesive layer is not provided in advance, an adhesive application unit 35 is provided between the liner sheet supply unit 11 and the laminating roll 33 and the first liner sheet 1 and the second liner sheet 2 are provided. Adhesive is applied to the inner surfaces facing each other.

  Further, in the unwinding and feeding direction of the first corrugated sheet 3 and the second corrugated sheet 4 by the pair of upper and lower corrugated sheet feeding means 21 (21, a pair of overlapping layers facing each other at a slight distance provided as necessary) The laminating roll 33 (laminated roll) is provided. In addition, an adhesive application unit 35 is provided between the corrugated sheet supply unit 21 and the laminating roll 33 so that the adhesive is applied to the inner surfaces of the first corrugate sheet 3 and the second corrugate 4 facing each other. To.

  Thereby, the first corrugated sheet 3 and the second corrugated sheet 4 are introduced between the first liner sheet 1 and the second liner sheet 2 while being introduced into the laminating roll 33, As shown in FIGS. 1 and 4A, the first liner sheet 1 and the wave traveling directions intersect with each other (for example, perpendicular to each other). The corrugated cardboard of the present invention comprising the 1 corrugated sheet 3, the second corrugated sheet 4, and the second liner sheet 2 is manufactured.

  A corrugated sheet having a wave traveling direction orthogonal to the sheet supply direction is provided at the subsequent stage of the sheet supply direction of the first and second liner sheets 1 and 2 unwound by the pair of corrugated sheet supply units 21 and 21. A pair of opposing first corrugated sheet forming portions 25, 25 for forming the first corrugated sheet 3, and a pair of opposing second corrugated sheets for forming the corrugated second corrugated sheet 4 having parallel wave traveling directions The molding parts 27 and 27 are provided.

And the first and second corrugated sheet 3, the wave traveling directions supplied between the first and second liner sheets 1 and 2 are orthogonal to the subsequent stage of the first and second corrugated sheet forming sections 25 and 27, 4 is provided with a laminating roll 33 (laminating means) for laminating 4.

  In the apparatus of the present invention, the first and second corrugated sheet forming sections 25 and 27 (corrugator and corrugated sheet forming roll) of the pair of corrugated sheet supply means 21 and 21 respectively extend along the supply direction of the corrugated sheets 3 and 4. One or more groups are arranged.

  Further, the corrugators 25 and 27 are arranged so that the corrugated sheets 3 and 4 supplied in a flat plate shape are sequentially formed into corrugated plates from the sheet width central portion toward both outer sides in the width direction. Yes.

  Further, in the apparatus of the present invention, in FIG. 3, a single intermediate liner sheet supply means 15 is provided between the pair of upper and lower corrugated sheet supply means 21, 21, thereby supplying the corrugated sheet supply means 21, 21. The intermediate liner sheet 5 is sandwiched between the first liner sheet 1 and the second liner sheet 2 by supplying one flat intermediate liner sheet 5 between the two corrugated sheets 3, 4. As shown in FIG. 4 (b), the first liner sheet 1, the first corrugated sheet 3 and the second corrugated sheet 4 whose wave traveling directions intersect (for example, orthogonal to each other), and the first A corrugated board of the present invention comprising the intermediate liner sheet 5 sandwiched between the second corrugated sheets 3 and 4 and the second liner sheet 2 is manufactured.

The external appearance perspective view of the cardboard of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS The outline perspective view explaining the corrugated board manufacturing method and manufacturing apparatus of this invention. BRIEF DESCRIPTION OF THE DRAWINGS The outline | summary whole side view explaining the cardboard manufacturing method and manufacturing apparatus of this invention. The side view of the cardboard of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... 1st liner sheet 2 ... 2nd liner sheet 3 ... 3rd corrugated sheet 4 ... 4th corrugated sheet 5 ... Intermediate liner sheet 11 ... 1st, 2nd liner sheet supply means 21 ... 1st, 2nd liner sheet supply Means 25 ... Corrugator 27 ... Corrugator 33 ... Pasting means

Claims (8)

  A flat surface liner sheet and a back liner sheet constituting the outermost surface, and two corrugated sheet corrugated sheets constituting a core sandwiched between the front and back liner sheets are laminated. A corrugated cardboard, wherein the corrugated sheets of corrugated sheet are perpendicular to each other.   The cardboard according to claim 1, wherein a liner sheet is laminated between the two corrugated sheet corrugated sheets. a) first and second liner sheet supply steps of supplying a flat plate-like first liner sheet and a second liner sheet in the same direction so that their sheet surfaces face each other;
b) A corrugated first corrugated sheet whose wave traveling direction is orthogonal to the sheet supply direction of the first and second liner sheets, and a corrugated second corrugated sheet whose wave traveling direction is parallel. First and second corrugated sheet molding steps to be molded;
c) After the first and second corrugated sheet forming steps, the first and second corrugated sheets whose wave traveling directions are orthogonal are supplied between the first and second liner sheets, and the first liner A laminate production step of producing a laminate comprising a sheet, a first corrugated sheet, a second corrugated sheet, and a second liner sheet;
d) a laminating step of bonding the produced laminate through an adhesive;
A method for producing corrugated cardboard, comprising:   The liner sheet supplying step includes an intermediate liner sheet supplying step of supplying a single flat liner sheet between the first and second corrugated sheets supplied in the corrugated sheet supplying step. The corrugated board manufacturing method according to claim 3.   Between the liner sheet supply means for supplying the flat first liner sheet and the second liner sheet in the same direction so that their sheet surfaces face each other, and between the first and second liner sheets facing each other, The corrugated sheet supplying means supplies the plate-like first corrugated sheet and the second corrugated sheet with their wave traveling directions orthogonal to each other, and the corrugated sheet supplying means is a sheet of the first and second liner sheets. A first corrugated sheet forming portion that forms a corrugated first corrugated sheet whose wave traveling direction is orthogonal to the supply direction, and a second corrugated sheet-like second corrugated sheet whose wave traveling direction is parallel. A corrugated sheet forming section is provided, and the wave traveling direction supplied between the first and second liner sheets is directly connected to the subsequent stage of the first and second corrugated sheet forming sections. The first of, facer, characterized in that it comprises a laminate means for bonding the second corrugated sheet.   6. The corrugated board manufacturing apparatus according to claim 5, wherein each of the first and second corrugated sheet forming portions of the corrugated sheet supply means has a plurality of corrugators arranged along the corrugated sheet supply direction.   7. The corrugated cardboard according to claim 6, wherein the corrugator is disposed so as to form the corrugated sheet to be supplied into a corrugated sheet in order from the sheet width central portion toward both outer sides in the width direction. Manufacturing equipment.   The said liner sheet supply means is provided with the intermediate liner sheet supply means which supplies one flat liner sheet between the two corrugated sheets supplied by the said corrugated sheet supply means. The corrugated board manufacturing apparatus according to any one of 5 to 7.

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