JP2006044142A - Method for manufacturing multi-layer corrugated board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new method which makes a multi-layer corrugated board of not less than four layers available at a low cost. <P>SOLUTION: In this method, a two-layer corrugated board blank 10 is formed which can be assembled into a box main body 10' having four pieces of side walls 11a to 11d continuously formed through longitudinal ruled lines 12a to 12c and at least, bottom walls 16a to 16d. In addition, a three-layer corrugated board blank 20 is formed which can be laminated on the four pieces of the continuously formed side walls 11a to 11d of the two-layer corrugated board and has a ruled line formed at spots corresponding to each ruled line 12a to 12c at the four pieces of the side walls 11a to 11d. Further, the three-layer corrugated board blank 20 is laminated on the four pieces of the continuously formed side walls 11a to 11d of the two-layer corrugated board blank 10 and the blank 30, for a packaging box of a multi-layer corrugated board, consisting of a five-layered barrel part, is obtained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a multilayer corrugated cardboard that can be suitably used for storage, transportation, etc. of heavy objects, for example, and specifically relates to a blank, a sleeve, a packaging box made of the multilayer corrugated cardboard and methods for producing them.

  2. Description of the Related Art Conventionally, packaging boxes made of multilayer cardboard such as two-layer cardboard and three-layer cardboard are known. A known apparatus for producing a double-layer cardboard (see, for example, Patent Document 1) will be described with reference to FIG.

  This apparatus includes a single-sided corrugated cardboard sheet 1 manufactured by attaching a liner and a corrugated core in a front sheet manufacturing unit a, a single-sided cardboard sheet 2 manufactured in the same way in a subsequent sheet manufacturing unit a, and an underliner. 3 are pasted and integrated with each other through a preheater b and a glue machine c, and the bonded sheet (double-layer corrugated cardboard sheet) 100 is dried by a heating machine d and cooled and tempered by a cooling machine e. After that, the slitter scorer f cuts to a predetermined width, puts vertical ruled lines and horizontal ruled lines at predetermined positions, and further cuts to a predetermined length with a cutter g to obtain a two-layer cardboard 101. The entire process is completed by stacking with the stacker h.

  When manufacturing three-layer corrugated cardboard, although not shown in the drawings, each sheet manufacturing unit uses an apparatus having an intermediate sheet manufacturing unit a between the preceding sheet manufacturing unit a and the subsequent sheet manufacturing unit a. Three single-sided corrugated cardboard sheets manufactured by adhering a liner and corrugated core, and an underliner are adhered to each other to obtain an integrated three-layer corrugated sheet. Next, drying, cooling refining, width direction cutting, ruled line insertion, and length direction cutting are sequentially performed to obtain a three-layer cardboard.

  The two-layer corrugated cardboard and the three-layer corrugated cardboard obtained in this way are formed by bending vertical and horizontal ruled lines (folded lines) formed at predetermined locations and attaching the required locations, for example, four side walls and a bottom portion. It is provided as a base material that can be assembled in a box shape with a lid.

JP 2003-181957 A

  By the way, in recent years, as a packaging box made of corrugated cardboard that can withstand heavy goods and electric appliances that incorporate electronic devices, and can be transported, it has better strength and durability than conventional two-layer corrugated cardboard and three-layer corrugated cardboard. There is a demand for provision of sleeves and packaging boxes made of four or more layers of corrugated cardboard.

  In the apparatus described above, it is theoretically possible to form a multi-layer corrugated sheet having four or more layers by adding the sheet manufacturing section a. In that case, four or more sheet manufacturing sections a are required, A slitter scorer or cutter capable of cutting a sheet having a considerable thickness obtained by laminating one or more single-sided corrugated cardboard sheets into a predetermined shape or inserting vertical and horizontal ruled lines is required. Therefore, not only the apparatus becomes large, but also a slitter scorer and a cutter that can cut four or more layers of corrugated cardboard sheets and can be creased must be newly installed. As a result, the corrugated board manufacturing cost increases, which is not practical. .

  The present invention has been made in view of such conventional circumstances, and the object of the present invention is to provide a novel method that can provide blanks, sleeves, packing boxes, etc. composed of four or more layers of corrugated cardboard at a low cost. It is to provide.

In order to achieve the above object, a method for producing a multilayer cardboard blank according to the present invention includes a step of cutting a two-layer corrugated cardboard sheet into a required shape and forming a two-layer corrugated cardboard blank with a ruled line at a predetermined position thereof,
The three-layer corrugated cardboard sheet is cut into a shape that can be bonded to the required portion of the two-layer corrugated cardboard blank, and the three-layer corrugated cardboard is provided with a ruled line corresponding to each ruled line at the bonding position of the two-layer corrugated cardboard blank. Forming a blank;
A step of bonding the three-layer cardboard blank to a required portion of the two-layer cardboard blank.

  According to such a method, in contrast to a two-layer cardboard blank that has been cut into a required shape and previously ruled at a predetermined location, a three-layer cardboard that has been cut into a required shape and previously marked at a predetermined location. Since blanks can be attached, the required parts can be assembled into the required shape with five layers of corrugated cardboard without the need for new equipment and equipment, as in the case of corrugated sheets stacked in five layers and then creased. Multi-layer cardboard can be provided at low cost.

  The multilayer corrugated cardboard according to the present invention is cut into a required shape and cut into a two-layer cardboard blank having a ruled line at a predetermined position thereof and a shape that can be bonded to the required position of the two-layer cardboard blank. The three-layer cardboard blank is formed by bonding a ruled line at a position corresponding to each ruled line at the bonding position of the two-layer cardboard blank.

  According to such a configuration, a three-layer corrugated cardboard that has been cut into a required shape and previously scribed with a ruled line in contrast to a two-layer cardboard blank that has been cut into a required shape and previously scribed with a ruled line. Since it is made of multilayer cardboard with a blank attached, it can be manufactured at low cost, and the required location is made of five-layer corrugated cardboard, so it can withstand packing and transportation of home appliances incorporating heavy items and electronic devices. -It can be provided as a new multilayer cardboard excellent in durability and the like.

When the multi-layer cardboard is a blank for a sleeve, the double-layer cardboard sheet is cut into a rectangular shape, and a vertical ruled line is put at a predetermined position, and a sleeve consisting of four continuous side walls can be assembled through the vertical ruled line. Forming a double-layer cardboard blank,
Using a three-layer corrugated sheet, forming a three-layer corrugated cardboard blank that can be bonded to the two-layer corrugated cardboard blank and having vertical ruled lines at locations corresponding to the respective vertical ruled lines in the two-layer corrugated cardboard blank;
Preferably, the manufacturing method includes a step of bonding the two-layer cardboard blank and the three-layer cardboard blank.

Further, when the multilayer cardboard is a sleeve blank, a sleeve body assembled by folding and sticking the main points of the two-layer cardboard blank provided with four side walls respectively connected through vertical ruled lines;
Can be bonded to the two-layer cardboard blank and assembled into a rectangular tube by folding and sticking the key points of the three-layer cardboard blank with vertical ruled lines at the locations corresponding to the vertical ruled lines in the two-layer cardboard blank Equipped with an interior case
It is preferable that the interior case is attached to the inside of the sleeve body.

When the multi-layer cardboard is a packaging box blank, the double-layer corrugated cardboard sheet is cut into a required shape, and vertical and horizontal ruled lines are put at predetermined positions thereof, and the four side walls are continuous through the ruled lines and at least the bottom wall is provided. Forming a double-layer corrugated cardboard blank that can be assembled into a box-like shape,
Three-layer corrugated cardboard sheet, three layers that can be bonded to four consecutive side wall portions in the two-layer corrugated cardboard blank and have vertical ruled lines at locations corresponding to the respective vertical ruled lines on the four sidewalls Forming a cardboard blank;
Preferably, the manufacturing method includes a step of bonding the three-layer cardboard blank to four consecutive side wall portions in the two-layer cardboard blank.

When the multilayer cardboard is a packaging box blank, at least four side walls adjacent to each other via vertical ruled lines, and a lower edge of a predetermined side wall are provided via horizontal ruled lines. A box body assembled by folding and sticking the key points of a double-layer corrugated cardboard blank provided with a bottom wall;
Folding of the main part of the three-layer cardboard blank, which can be bonded to four consecutive side wall portions in the two-layer cardboard blank, and has horizontal ruled lines in the portions corresponding to the respective vertical ruled lines on the four side walls; It is equipped with an interior case that can be assembled into a square tube by sticking,
It is preferable that the interior case is attached to the inside of the four side wall portions of the box body so that the body portion is made of five-layer cardboard.

  As described above, the present invention attaches a three-layer cardboard blank formed by cutting and ruling a three-layer cardboard sheet to a two-layer cardboard blank formed by cutting and ruled a two-layer cardboard sheet. Because it is a method to be worn, it is possible to effectively utilize existing equipment without adding or installing new equipment or equipment for manufacturing five-layer corrugated cardboard. It is possible to provide new multilayer cardboard blanks, sleeves, and packaging boxes that can withstand the packaging and transportation of household electrical appliances incorporating the above, and that are excellent in strength and durability, etc. at low cost.

  In addition, the multilayer corrugated cardboard according to the present invention is a three-layer corrugated cardboard blank formed by cutting and ruling a three-layer corrugated cardboard sheet against a two-layer corrugated cardboard blank formed by cutting and ruling a two-layer corrugated cardboard sheet. Since it is affixed, it can be manufactured at low cost by effectively using existing equipment without adding or installing new equipment or equipment for producing five-layer cardboard. Also, because it consists of five-layer corrugated cardboard, it is provided as a new multilayer corrugated cardboard blank, sleeve, and packaging box with excellent strength and durability that can withstand packaging and transportation of household appliances incorporating heavy objects and electronic devices. We were able to.

Hereinafter, as an example of an embodiment of the present invention, a case where a multilayer cardboard is a packaging box blank will be described with reference to the drawings.
FIG. 1 shows a two-layer cardboard blank 10 for forming a box body of a multilayer cardboard packaging box according to the present invention, and FIG. 2 shows a three-layer cardboard for forming an interior case of the multilayer cardboard packaging box. A blank 20 is shown.

The double-layer cardboard blank 10 has four side walls 11a to 11d in which adjacent side walls are connected to each other via vertical ruled lines 12a to 12c, and horizontal ruled lines 13a to 13d on the upper edges of the respective side walls 11a to 11d. Of the upper edge portions 14a to 14d provided continuously through the bottom walls, the bottom walls 16a to 16d provided continuously to the lower edges of the respective side walls 11a to 11d via the horizontal ruled lines 15a to 15d, and the side wall 11d on one end side. It has a sticking surface 17 connected to the outer edge via a vertical ruled line 12d. The ruled lines 12a to 12d, 13a to 13d, and 15a to 15d are bent, and the sticking surface 17 is connected to the side wall 11a on the other end side. As a result, the box body 10 ′ is assembled so that the top surface is opened and the bottom surface is closed by the bottom walls 16a to 16d.
In addition, if each said upper edge surface 14a-14d is made into the cover part of the magnitude | size comparable as bottom wall 16a-16d, the box main body which block | closes a lower surface with each cover part can be comprised.

  The double-layer cardboard blank 10 can be manufactured through the above-described process using a known apparatus as shown in FIG.

  The three-layer cardboard blank 20 corresponds to each of the vertical ruled lines 12a to 12d on the four side walls 11a to 11d so that the three-layer cardboard blank 20 can be bonded to the continuous four side walls 11a to 11d of the two-layer cardboard blank 10. The four side walls 21a to 21d, which are made of rectangular three-layer corrugated cardboard with vertical ruled lines at the locations to be attached, can be respectively attached to the four side walls 11a to 11d via the vertical ruled lines 22a to 22c. And is provided with a sticking surface 23 continuously provided on the outer edge of the side wall 21d on one end side via a vertical ruled line 22d. The ruled lines 22a to 22d are bent and the sticking surface 23 is connected to the other end side. By sticking to the side wall 21a, a rectangular tube-shaped (sleeve-shaped) interior case 20 'is assembled.

  This three-layer corrugated cardboard blank 10 is a known apparatus as shown in FIG. 6 by a dedicated apparatus in which an intermediate sheet manufacturing section a is added between the preceding sheet manufacturing section a and the subsequent sheet manufacturing section a. It can be manufactured through the aforementioned process.

  Then, the three-layer cardboard blank 20 is made to correspond to the side walls 11a to 11d and 21a to 21d to the inner surface portions of the side walls 11a to 11d in the two-layer cardboard blank 10, and the vertical ruled lines 12a. By sticking 12d and 22a-22d in correspondence with each other, a multi-layer corrugated cardboard packaging box blank 30 having a trunk portion of a five-layer corrugated cardboard is formed (see FIG. 3).

  Since this blank 30 is formed by laminating the two-layer cardboard blank 10 and the three-layer cardboard blank 20 on which the vertical ruled lines 12a to 12d and 22a to 22d are formed in advance, a portion that becomes a five-layer cardboard (portion that becomes a trunk) The vertical ruled lines 12a to 12d and 22a to 22d can be easily bent to assemble a multi-layer corrugated cardboard packaging box 30 '(see FIG. 4 and FIG. 5) that has a five-layer corrugated board easily and at low cost. it can.

  When the multilayer cardboard is a sleeve blank, the two-layer cardboard blank 10 does not include the upper edge portions 14a to 14d and the horizontal ruled lines 13a to 13d, and the bottom walls 16a to 16d and the horizontal ruled lines 15a to 15d. The sleeve body is constituted by the layered cardboard blank. Moreover, an interior case can be comprised using the three-layer cardboard blank 20 mentioned above as it is. Other than that, the method and configuration are the same as those described above, and therefore, redundant description and illustration are omitted.

  As described above, an example of the embodiment of the present invention has been described with reference to the drawings. However, the multilayer cardboard is not limited to the above-described packaging box or sleeve. That is, two-layer corrugated cardboard blank, three-layer corrugated cardboard blank, multilayer corrugated cardboard packaging box blank, box body, interior case, multilayer corrugated cardboard packaging box, equipment for cardboard manufacturing, etc. are limited to the illustrated examples However, it goes without saying that various modifications are possible within the scope of the technical idea described in the claims.

(A): Plan view showing an example of a two-layer cardboard blank according to the present invention, (B): Plan view showing an example of a three-layer cardboard blank according to the present invention. (A): An enlarged cross-sectional view taken along line (X)-(X) in FIG. 1 (A), (B): An enlarged cross-sectional view taken along line (Y)-(Y) in FIG. The perspective view which shows an example of the blank for multilayer cardboard packaging boxes which concerns on this invention. The perspective view which shows an example of the multilayer corrugated cardboard packaging box which concerns on this invention. The principal part enlarged plan view of FIG. (A): Schematic diagram showing an example of a two-layer cardboard manufacturing apparatus, (B): Schematic diagram showing a sectional structure of a single-sided cardboard, and (C): Schematic diagram showing a sectional structure of a two-layer cardboard.

Explanation of symbols

10: Double-layer cardboard blank 11a-11d: Side wall 12a-12d: Vertical ruled line 13a-13d, 15a-15d: Horizontal ruled line 16a-16d: Bottom wall 10 ': Box body 20: Three-layer cardboard blank 21a-21d: Side wall 22a -22d: Vertical ruled line 20 ': Interior case 30: Blank for multilayer cardboard packaging box 30': Multilayer cardboard packaging box

Claims (6)

Cutting the two-layer cardboard sheet into a required shape and forming a two-layer cardboard blank by putting a ruled line at a predetermined position thereof;
The three-layer corrugated cardboard sheet is cut into a shape that can be bonded to the required portion of the two-layer corrugated cardboard blank, and the three-layer corrugated cardboard is provided with a ruled line corresponding to each ruled line at the bonding position of the two-layer corrugated cardboard blank. Forming a blank;
And a step of bonding the three-layer cardboard blank to a required portion of the two-layer cardboard blank. A two-layer corrugated cardboard blank that is cut into the required shape and has a ruled line at the predetermined location;
A three-layer cardboard blank that is cut into a shape that can be bonded to a required portion of the two-layer cardboard blank and that has a ruled line at a position corresponding to each ruled line in the bonding position of the two-layer cardboard blank Multi-layer corrugated cardboard. Cutting the double-layer corrugated cardboard into a rectangular shape, forming vertical ruled lines at predetermined locations, and forming a double-layer corrugated cardboard blank that can be assembled into a sleeve composed of four continuous side walls through the vertical ruled lines; ,
Using a three-layer corrugated sheet, forming a three-layer corrugated cardboard blank that can be bonded to the two-layer corrugated cardboard blank and having vertical ruled lines at locations corresponding to the respective vertical ruled lines in the two-layer corrugated cardboard blank;
And a step of bonding the two-layer cardboard blank and the three-layer cardboard blank. A sleeve body assembled by folding and sticking the key points of a double-layer corrugated cardboard blank having four side walls arranged continuously through vertical ruled lines;
Can be bonded to the two-layer cardboard blank and assembled into a rectangular tube by folding and sticking the key points of the three-layer cardboard blank with vertical ruled lines at the locations corresponding to the vertical ruled lines in the two-layer cardboard blank Equipped with an interior case
A multilayer corrugated cardboard, wherein the interior case is attached to the inside of the sleeve body. A two-layer corrugated cardboard sheet, which is cut into a required shape and has vertical and horizontal ruled lines at predetermined locations, and the four side walls are continuous through the ruled lines and can be assembled in a box shape having at least a bottom wall. Forming a blank;
Three-layer corrugated cardboard sheet, three layers that can be bonded to four consecutive side wall portions in the two-layer corrugated cardboard blank and have vertical ruled lines at locations corresponding to the respective vertical ruled lines on the four sidewalls Forming a cardboard blank;
And a step of bonding the three-layer cardboard blank to four consecutive side wall portions of the two-layer cardboard blank. The essential of a two-layer corrugated cardboard blank comprising at least four side walls in which adjacent side walls are connected via vertical ruled lines, and a bottom wall connected to the lower edge of a predetermined side wall via horizontal ruled lines. A box body assembled by folding and sticking the place,
Folding of the main part of the three-layer cardboard blank, which can be bonded to four consecutive side wall portions in the two-layer cardboard blank, and has vertical ruled lines at positions corresponding to the respective vertical ruled lines in the four side walls; It is equipped with an interior case that can be assembled into a square tube by sticking,
A multilayer corrugated cardboard having a trunk portion of five-layer corrugated cardboard, wherein the interior case is adhered to the inside of four side wall portions of the box body.

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