JP2005320065A - Laminated panel blank and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated panel blank and its manufacturing method, which allows the blank to be folded or bent at will. <P>SOLUTION: The laminated panel blank is obtained by integrally bonding composite sheets which have their contours, creases, etc., provided in common identical disposition, shape and dimensions, etc, and its manufacturing method are provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a laminated panel / blank to be obtained by bending a container for carrying various articles, an interior / exterior panel for construction, a temporary frame panel, a furniture fixture, and the like, and a manufacturing method thereof.
[Background Technology]

As a conventional technique, a double leaf of a unidirectional corrugated corrugated body double-sided composite sheet (hereinafter referred to as “double-sided corrugated sheet”) or a unidirectional corrugated corrugated body single-sided composite sheet (hereinafter referred to as “single-sided corrugated sheet”) is integrated with each other. There is a conventional laminated panel obtained by pasting, and the blank obtained by forming the appropriate contour part, notched part, cutout part, ruled line part, etc. by punching the panel before or after pasting There is. A double-sided sheet is a sheet in which each liner is integrated on both sides of a corrugated body that is an orthogonal plane, and a single-sided sheet is a sheet in which a liner is integrated on one side of the corrugated body.

In the conventional laminated panel blank formed as described above, there are many problems in providing a specific ruled line portion that enables a bending angle close to 180 °.
In order to obtain a thick conventional laminated panel blank that can be bent deeply by 180 ° in the ruled line provided first, the maximum width of the ruled line and the ruled line in a double-sided or single-sided sheet in advance. It was indispensable to carry out punching in order to sequentially change the sheet extension in the direction perpendicular to the central axis. As a result, high-speed automation of the punching process using several types of punching dies is hindered, leading to a disadvantage that the productivity is lowered and the die is enlarged. In addition, since the punched double-sided or single-sided corrugated sheet is provided with various specification conditions such as shape dimensions for each sheet, it is difficult to automate their integral bonding, and laminating is extremely productive. It was forced to decline. Furthermore, it is indispensable that the conventional laminated panel blank that has been integrally bonded must be subjected to a predetermined bending process before the adhesive is fixed. Since it is impossible to re-deploy a laminated panel / blank that has been bent and solidified once, this conventional laminated panel / blank is not suitable as a common punch that requires repeated folding and unfolding. It was.

[Problems to be solved by the invention]

In order to solve the above problems, by reviewing the various specification conditions in the contour part, the cut part, the cut part, and the ruled line part provided on the double-sided or single-sided sheet used as the material for the laminated panel / blank, The issue is to produce a new laminated panel blank that enables deep bending and mass-produces it under a highly productive punching and laminating method.
[Means for solving the problems]

In order to solve the above-mentioned problems, a double-sided or single-sided sheet or a composite sheet (hereinafter referred to as “material sheet”) is adopted as a material for the laminated panel / blank of the present invention. By the punching process, the various specification conditions for the contour portion, the cut portion, the cut portion, and the ruled line portion are provided in advance as substantially the same in the multi-leaf material sheet. In the process of stacking a multi-leaf material sheet provided with a specific ruled line portion having a maximum width W ₁ exceeding the laminated panel thickness W ₂ × 2 × 3/4, the portion within the maximum width W ₁ of the specific ruled line portion is substantially Except that the multi-leaf material is integrally bonded to obtain the laminated panel blank of the present invention.
〔The invention's effect〕

According to the present invention, the contour portion, the cut portion, the cut portion, and the ruled line portion of the multi-leaf material sheet are provided with substantially the same specification conditions, so that the material sheet is punched at a high speed by the same punching die. Along with processing, the bonding process enabled high-speed pretreatment with continuous rolls and the same crimping process, and a laminated panel blank with excellent productivity was obtained at low cost. Further, the punched bileaf material sheet is provided with a specific ruled line portion having a maximum width W ₁ ≧ panel thickness W ₂ × 2 × 3/4, and a portion within the maximum width W ₁ is substantially excluded and integrated with each other. The laminated panel blank of the present invention obtained by pasting is easy to repeat folding and unfolding close to 180 ° in the specific ruled line part, so that it can be expected for a conventional laminated panel blank. It can be used in various packaging cases such as returnable containers.
[Best Mode for Carrying Out the Invention]

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows two types of material sheets that are the main materials of the laminated panel blank (B) of the present invention, and 1-1 is a perspective view in which a double-sided sheet (a) is partially broken, and its reduction 3 FIG. 1-3 is a perspective view in which the composite sheet (b) is partially broken, and 1-4 is a reduced three-side view thereof.
FIG. 2 shows (A) and a ruled line portion of a conventional laminated panel blank, 2-1 is a sectional view of the blank, 2-2 is a folded body (A ′) that has been bent 180 °. FIG. The upper and lower liners 1 of each of the double-sided sheet (a) of 2-1 are shown by two solid lines, and the core 2 is shown as a thin solid line by only the uppermost double-sided sheet, and is omitted in other sheets. The dotted lines are the envelopes at the top and bottom of the core 2. In 2-2, the upper and lower liners 1 of the double-sided sheet (a ′) are indicated by thin solid lines, and all the cores 2 to be provided between them are omitted.

FIG. 3 shows the laminated panel blank (B) of the present invention and its ruled line part, and 3-1 shows the present composite sheet (b) provided with one ruled line part from both sides of the front and back. FIG. 3-2 is a cross-sectional view of the scale ½ of the 180 ° bent body (B ′). 3-3 is a cross-sectional view of the laminated panel blank (B) in which the present composite sheet (b) provided with two ruled lines from the surface and a back or wide one ruled line in the middle is integrally bonded; 3-4 is a scale 1/2 sectional view of the 180 ° bent body (B ′), and 3-5 is a laminate in which the composite sheet (b) provided with two ruled lines from the surface is integrally bonded. It is sectional drawing of a panel blank (B), 3-6 is the bending body (B ') scale 1/2 sectional view of the approximately 70 degrees. 3-7 is a cross-sectional view of the composite sheet (b) provided with one ruled line from both the front and back surfaces, and 3-8 is a scale 1/2 of the approximately 90 ° folded body (B ′). It is sectional drawing.

In FIG 3 3-1,3-3,3-5 is provided and its borders maximum width _{W 1} panel thickness _{W 2} × ₂ × 3/4 or more, the panel thickness the maximum width _{W 1} is 3-6 W ₂ × ₂ × 3/4 below together provided as 3-1,3-3,3-6 without some or all of the ruled line maximum width _{W 1} inside position is integrally pasted, 3-5 Is characterized in that all of the above parts are integrally bonded.
In addition, in 3-1, 3-3, 3-5 and 3-7, the core 2 'is omitted except for the uppermost sheet (b), and each dotted line 2' is an envelope of the top of the core 2 '. Is shown as In 3-2, 3-4, 3-6, and 3-8, each liner is a thin dotted line, and the envelope of the core 2 'is partially displayed. Further, in 3-1, 3-7, the finishing liner 1 'is provided on the maximum sheet (b), and in 3-2, 3-5, it is not provided.

FIG. 4 shows various methods for covering the end portion of the contour portion of the laminated panel blank (B) of the present invention. 4-1, 4-3, 4-5, 4-7, 4 -9, 4-11, and 4-13 are partial sectional views that have been processed, and 4-2, 4-4, 4-6, 4-8, 4-10, 4-12, and 4-14 are the above It is a fragmentary sectional view before a process start.

FIG. 5 shows a preferred embodiment in which the laminated panel blank (B) of the present invention is applied to a returnable container (C) that can be assembled and deployed. Reference numeral 5-1 denotes a laminated panel blank (B). 5-2 is a perspective view of a returnable container obtained by bending the blank (B). In addition, the thick solid line of 5-1 is an outline part and a notch | incision part, the short cycle dotted line and the thin solid line are the ruled lines for bending of about 90 degrees, and the long cycle dotted line is a specific ruled line for bending of about 180 degrees is there. The thin solid line is broken in the mountain, and the long and short cycle dotted lines are the valley broken ruled line.

In FIG. 1, as shown in 1-1 double-sided sheet (a) and 1-2 composite sheet (b), the former is a first-order cylindrical corrugated body 2 and upper and lower two-leaf liners 1. Is the one in which the serpentine corrugated body 2 ′ having a quadric surface and the one-leaf liner 1 are integrally bonded.
In FIG. 2A, each sheet extension is previously set to L ₀ <L ₀ ′ <L ₀ ″ and the maximum width of the ruled line portion is set to W ₀ <W ₀ ′ <W ₀ ″. A conventional laminated panel blank (A) in which each of the three-leaf double-sided sheet (a) provided is integrally bonded while being integrally bonded is shown. After the blank (A) is formed in 180 deep folds, the folded body (A ′) is obtained after being solidified by integral bonding.
As described above, when the double-sided sheet (a) is punched, the productivity decreases due to various punching dies and replacement thereof, and the leading edge is lowered due to the positioning or bending just before solidification during the lamination process. The conventional laminated panel blank (A) thus obtained is inevitably increased in cost, and cannot be folded or unfolded, so that it is not suitable for a wide range of applications such as returnable containers.

In order to solve this problem, when a material sheet such as a double-sided sheet (a) or a single-sided sheet (a) or the present composite sheet (b) is used as a material for the laminated panel blank (B) of the present invention. Although the composite sheet (b) is taken as a preferred embodiment, its details will be described with reference to FIG.
Each of the three leaves of the composite sheet (b) is provided with the same specifications for various shapes and dimensions to be selected for the sheet outline and ruled line as shown in each embodiment of FIG. As a result, a deep-folded or shallow-folded laminated panel blank (B) was obtained.

Arranging the various conditions to be selected, there are three major shape principles. As the first shape principle, the multi-leaf composite sheet (b) constituting the laminated panel blank (B) is arranged, shaped and dimensioned. Contours, cuts, and cutouts were formed with various specifications and conditions substantially the same, and specifications, such as placement, number of units, plane / cross-sectional shape, and dimensions were made substantially the same. A ruled line portion may be formed and provided. As the second shape principle, only when the bi-leaf composite sheet (b) constituting the laminated panel blank (B) is integrally bonded to each other, only at a specific ruled line portion capable of deep folding close to 180 ° The ruled line maximum width W ₁ is preferably formed so as to be larger than the thickness W ₂ × 2 × 3/4 of the laminated panel (B). As the third shape principle, in the specific ruled line portion that enables deep folding close to 180 ° when the multi-leaf composite sheet (b) constituting the laminated panel blank (B) is bonded and integrated with each other its borders maximum width W ₁ inside position of some or all may be provided so as not lamination integrated.

Furthermore, the following four implementation shape rules are calculated | required in the laminated panel blank (B) of an implementation stage. In other words, the composite sheet (b) of double leaf is provided based on the first shape principle, or the composite sheet (b) of double leaf is provided based on the first and second shape principles. The double-leaf composite sheet (b) is provided based on the second and third shape principles, or the double-leaf composite sheet (b) is provided based on the first and third shape principles.
It is indispensable that at least one of the above four practical shape rules is satisfied in the composite sheet (b) of the biplane, and all the laminated panel blanks formed so as to satisfy them are the laminated panels of the present invention. Needless to say, it is effective as a blank (B).

Specific examples of the laminated panel blank (B) of the present invention implemented based on the four practical shape rules obtained from the combination of the above three shape principles will be described.
In FIG. 3, various laminated panel blanks (B) preferable for the present invention and a simple bent body (B ′) show the minimum ruled line portion and its periphery for explaining the above four practical shape rules. It is shown as a local cross-sectional view, and all the laminated panels and blanks (B) are integrally bonded as a main material with the three-leaf composite sheet (b) provided under the same various specifications. It is characterized by being obtained.
In 3-1, the seat extension L _1, 2 present ruled portion thereof flat with the respective one of front and back both sides, integral present composite sheet biplane provided a cross-sectional shape as the same common (b) is a cross The laminated panel blank (B) formed by bonding has a maximum ruled line width W _{1 of} at least the blank thickness W ₂ × 2 × 3/4 and substantially integrates all the parts in the maximum ruled line width W _1. It is not pasted. In 3-2, a folded body (B ′) that can be bent nearly 180 ° by satisfying the above-mentioned various specification conditions was obtained.

The seat extension L ₁ as shown in 3-3, the two narrow from the surface, three border portion thereof flat that each one spread from the back, biplane provided a cross-sectional shape as the same common In the laminated panel blank (B) formed by integrally bonding the composite sheet (b) to each other, the ruled line maximum width W _{1 is set} to the blank thickness W ₂ × 2 × 3/4 or more and the ruled line maximum width W _{It is that} the whole ₁ site | part is not integrally bonded substantially. In 3-4, by satisfying the above various specification conditions, a folded body (B ′) that can be bent nearly 180 ° was obtained.

As shown in 3-5, together with the sheet extension L ₁ , the double-leaf composite sheet (b) in which two narrow ruled line portions are provided on the surface with the same plane and the same cross-sectional shape are integrally bonded to each other. The laminated panel blank (B) thus formed has a maximum ruled line width W _{1 of} at least the blank thickness W ₂ × 2 × 3/4 and the both sides of the ruled line maximum width W ₁ are not integrally bonded. It is. In 3-6, by satisfying the above-mentioned various specification conditions, a folded body (B ′) having a limit of about 70 ° was obtained.

The seat extension L ₁ as shown in 3-7, Table, two ruled line portions from back both sides and each one has its flat, Bi of the composite sheet provided with cross-sectional shape as the same common (b) The laminated panel blank (B) formed by integrally bonding with each other has a maximum ruled line width W ₁ of the blank thickness W ₂ × 2 × 3/4 or less and substantially all of the sites in the maximum ruled line width W ₁ Is not integrally bonded. In 3-8, by satisfying the above various specification conditions, a folded body (B ′) in which bending of about 90 ° was the limit was obtained.

Although not shown in the drawings, there are many other preferred embodiments of the present invention, and as long as the four practical shape rules related to the above three shape principles are satisfied individually or in appropriate combination, the composite leaf to be integrally bonded as the main material The number of leaves of the present composite sheet (b), the number of units of ruled line portions to be provided on the sheet b, flatness, cross-sectional shape and dimensions, arrangement on the front or back, and methods for changing various ruled line specifications on the same ruled line extension Can be freely selected, and both are effective in the present invention.
As shown in FIG. 3, the laminated panel blank (B) of the present invention has a three-leaf composite sheet (b) and a three-leaf composite sheet (b) + single-leaf liner sheet (1). ′) Or two-leaf book composite sheet (b) + single-leaf double-sided book composite sheet (b ″), etc. The present composite sheet (b) that constitutes the core may be adopted, and the liner 1 of the uppermost composite sheet (b) is of a different specification from that of the other present composite sheet (b), for example, film coated. It may be replaced with a water-resistant type liner paper, the original liner may be replaced and a water-resistant type liner paper may be layered thereon, and the core 2 'of the lowermost composite sheet (b) is water-resistant type. You can replace it with something else. In addition to this, the double-leaf composite sheet (b) may be used as a main material and inserted into the middle portion thereof, and may be integrally bonded by a suitable combination with the double-sided sheet (a) and the single-sided sheet (a) Also, there are solid thick paper, wood plywood, thin metal, plastic plates, etc., which are integrally bonded as a surface finish sheet, and all liners and cores are water-resistant paper. It is effective for the present invention.

In addition, although this composite sheet (b) is shown by FIG. 3 as a main material of the preferable laminated panel blank (B) of this invention, the double-sided sheet (a) of FIG. 1-1, the single-sided sheet not shown in figure Three characteristics which come from the physical property of this composite sheet (b) are demonstrated through comparison with (a). First, sufficient bending rigidity in both the x and y directions out of the plane can be obtained with an equivalent base paper gauge. Second, it has excellent out-of-plane compression rigidity. Thirdly, this composite sheet (b), in which the ruled line portions provided in both the x and y directions cross the corrugated body with high out-of-plane compression rigidity, is the laminated panel blank (B). It was adopted as the main material.
When the composite sheet (b) is double-laminated and integrally bonded to each other, the first feature is that there is no difficulty in laminating the composite sheet (b) of a single-sided liner instead of double-sided. In the ruled line portion provided at a predetermined position according to the second and third characteristics when the composite sheet (b) is punched and processed, it is possible to perform bonding without crossing the plane waveform axis direction of the body alternately. Deep fold formation was performed accurately because it was stably maintained without any misalignment. And the laminated panel blank (B) obtained by integrally bonding was obtained as what was excellent in out-of-plane rigidity by the 1st, 2nd characteristic.

Although not shown, when the double-leaf double-sided sheet (a) is integrally laminated with the single-sided sheet (a) as the main material and alternately or parallelly intersecting the corrugated shaft directions, the above four practical shape rules are used. The sheet (a) is provided according to the first shape principle, or is provided according to the first and second shape principles, or is provided according to the first, second and third shape principles. Needless to say, the laminated panel blank finally provided according to the first and third shape principles is included in the present invention as an application embodiment of the laminated panel blank (B).

In FIG. 3, when the double-leaf composite sheet (b) is integrally bonded, the corrugated top of the corrugated body 2 'and the liner 1 adjacent to the corrugated body are adhered in a meandering line, or in addition to this However, the other cores may be adjacent to the core 2 ', and the sheets (b) may be reversed and bonded together so that the corrugated axes intersect or the liner 1 is adjacent.

Although there are various bonding methods in each of the bonding steps, as a typical example, a heat-softening coating agent that is preliminarily laminated or coated such as an adhesive that can be quickly solidified immediately before bonding. After the pre-bonding treatment is performed by means of the hot air temperature raising, the bileaflet composite sheet (b) adjacent to each other is preferably pressure-bonded and solidified and fixed.

The ruled line part includes a ruled line part provided on the composite sheet (b) relating to the laminated panel blank (B) of the present invention or a double-sided, single-sided sheet (a) and a conventional laminated panel blank (A). There are ruled line portions provided on the double-sided and single-sided and double-sided sheets (a) related to the above, but the previous specific ruled line portion is a part of what is included in the ruled line portion, and each of the first, second and third shape principles In addition, it is provided to enable the formation of a deep fold close to 180 °.
Then the distance between the front ruled line maximum width W ₁ and the most distant liner 1 or the inner core 2, 2 'on the compression deformation starting point from the central axis of the entire border formed by punching processing.
The panel thickness W ₂ and biplane of the composite sheet (b), a cross-sectional dimension of a double-sided or single-faced corrugated sheet (a), such as is integrally pasted the laminated panel blanks as the primary material (B), the main material When finishing materials such as liners are additionally attached to the above, the total cross-sectional dimensions are as follows.
In addition, in the first formation principle of the laminated panel blank (B) of the present invention, it is said that the notched portion and the cutout portion having the same common specifications are provided in the composite sheet of the double leaf, but this is not an essential condition and is a blank ( Depending on the application of B), there are those that do not require such cuts and cutouts, and it is needless to say that this is effective for the present invention.

定されたものである。４−１３は、４−１４の通り熱収縮性の袋状フイルムが加熱によりパウチされたものである。図示されないが、様々な端末処理方法が上記の他に数多くあり、いずれも本発明に関り有効である。FIG. 4 shows various terminal processing methods for the laminated panel (B) or blank (B) of the present invention, with the core 2 'and part of the liner 1 being omitted in the composite sheet (b) of the double leaf. Yes. 4-1, as shown in 4-2, after the panel thickness has been halved in advance, a 180 ° bend is formed at a specific ruled line portion provided in the middle of one's span, and is fixed by an adhesive or the like. It was obtained. In 4-3, after a slightly longer finishing sheet is bonded as shown in 4-4, the surplus portion is folded back and fixed. In 4-5, as shown in 4-6, the surplus portions of the upper and lower two finished sheets are folded and overlapped and fixed. In 4-7, the tape pillow finish sheet is folded into a U shape and fixed as shown in 4-8. 4-9, as shown in 4-10, with a U-shaped frame material fitted and fixed

It is determined. 4-13 is a pouch formed by heating a heat-shrinkable bag-like film as shown in 4-14. Although not shown, there are many other terminal processing methods other than those described above, all of which are effective in connection with the present invention.

FIG. 5 shows that the laminated panel blank (B) of the present invention is easy to repeat assembly and deployment, and is suitable for use in a returnable container (C) in which watertightness is ensured in the container body. A preferred embodiment obtained by design is shown. That is, in the blank (B) of 5-1, two kinds of side wall portions 5 and g are provided adjacent to the rectangular bottom surface portion e, and a lid portion i is provided adjacent to the outer edge of the side wall portion f. A lid flap portion j is provided on the outer edge of the lid portion i, a belt k that can be fastened and released and a grommet 1 are provided in the center of the outer edge of the other side wall portion g, and the side wall portions f and g are further connected to each other. The side wall flap part h is provided in the position where it connects.
In addition, in order to partition the above-mentioned respective portions of the blank (B), the short cycle dotted line 5 and the thin solid line 4 are provided as shallowly folded ruled line portions of about 90 °, and the long cycle dotted line 6 is provided as a specific ruled line portion of 180 ° deep bent. The first feature is that it is provided, and the second feature is in the circled portion 7 at the four corners of the bottom surface. In this type of normal blank, five ruled lines are concentrated at the four corners. Occasionally, deep crease lines in two directions are necessitated, so that a remarkable stretching strain and breakage of the panel material have been forced to occur at the mark portion 7. In order to solve this problem, the number of ruled lines concentrated on the circle marked part 7 is reduced from 5 to 4, that is, limited to one-way deep folded ruled lines, so that assembly and deployment can be repeated as returnable containers. Even so, there was an effect that no damage occurred in the local portion 7 marked with a circle. More specifically, a thin solid line 4 and a long cycle dotted line 6 are provided from the intersection 7 at the side wall flap portion h, and a thin solid line 4 and a short cycle dotted line 4 are provided by branching from one point on the long cycle dotted line. . Although not shown, there are other versatile and variously shaped packaging containers provided to satisfy any of the above four practical shape rules, all of which are effective in the present invention.

Next, the laminated panel blank (B) which is a specific embodiment shown in FIG. 5A and local cross-sectional views corresponding to the ruled line portions 4, 5, 6 provided in the blank (B) 3-1 to 3- 7 and FIG. 1-2 of this composite sheet (b) constituting the same, a method for producing the laminated panel blank (B) of the present invention will be described. First, each composite sheet (b) of bi-leaf formed in advance is formed so that various specification conditions for the arrangement, shape, and dimensions of the contour portion and the cut portion are the same in the punching process using a bobst, a rotary cutter, or the like. and their arrangement a border portion 4, 5, 6 units number, flat-sectional shape, various specifications condition dimensions are formed as the same common, and also the thickness of the particular border portion 6 is the maximum width W ₁ panel W ₂ It is formed from both sides of the sheet (b) as shown in FIG. 3-1 or 3-2 while being formed to be larger than × 2 × 3/4. Next, the double-leaf composite sheet (b) punched out as the same specification is subjected to a pre-treatment step by a hot air heater and an adhesive applicator in the laminating process stage, and then by a rotary laminating machine or a sheet-fed interleaf machine. The laminated panel blank (B) may be finally manufactured by pressure bonding.

Further, if necessary, a finishing sheet is pasted on the uppermost surface or the lowermost surface by a slip-sheet machine or the like in the finishing processing stage, and in some cases, as shown in FIGS. Terminal processing may be performed by a machine or the like.
In addition to the manufacturing method described above, the composite sheet (b) of bi-leaf that has been cut without being subjected to a predetermined punching process in advance is used, and after pre-processing, it is pressure-bonded by a rotary paper machine or a sheet paper machine. Then, the laminated panel blank (B) of the present invention may be manufactured by performing folding processing based on the above four practical shape rules with a bobst, a rotary cutter, etc., which is the laminated panel blank of the present invention. It is effective as one of the optimum manufacturing methods of (B), and this method may be adopted particularly in the case of a small number of leaves with 2-4 composite sheets (b) to be laminated. However, a variety of laminated panels and blanks (B) that have been modified appropriately are easily conceived under various specification conditions that satisfy any of the four practical shape rules related to the above three shape principles. This compound sheet of biplane (b) Method for manufacturing a laminated pasted are in laminated panel blanks obtained (B) is goes without saying that all included in the present invention is effective.
[Industrial applicability]

The laminated panel blank (B) of the present invention is not only used as an industrial application for the returnable container, etc. and other various packaging containers, but also by the new shape design of the blank, it can be bent freely while being excellent in light weight and rigidity. It will be used for civilian applications such as building construction materials, building materials, main bodies, or chair / table furniture that can be assembled and disassembled like origami paper, storage furniture, and furniture. Furthermore, it is expected to be widely used as materials, parts, and final products in various other fields because of its ease of assembly and deployment and low cost as well as easy disposal and recycling as an environmentally friendly material.

(1-1) A partially broken perspective view of a double-sided sheet (a) according to the present invention. (1-2) Three views of the sheet. (1-3) The perspective view of this composite sheet (b) in connection with this invention. (1-4) Three views of the sheet. (FIG. 2-1) Sectional drawing of a conventional laminated panel blank (A). (2-2) Sectional view of scale 1/2 and folded body (A ′) of the blank (A). (FIG. 3-1) Sectional drawing of the laminated panel blank (B) of this invention. (3-2) Sectional view of scale 1/2 and bent body (B ') of the blank (B). (3-3) Sectional view of the laminated panel blank (B) of the present invention. (3-4) Sectional view of the scale 1/2 and the folded body (B ′) of the blank (B). (3-5) Sectional view of the laminated panel blank (B) of the present invention. (3-6) Sectional view of the scale 1/2 and the folded body (B ′) of the blank (B). (3-7) Sectional view of the laminated panel blank (B) of the present invention. (3-8) Sectional view of the scale 1/2 and the folded body (B ′) of the blank (B). (4-1) A cross-sectional view of the laminated panel blank (B) of the present invention that has undergone terminal processing. (4-2) Cross-sectional view of the blank (B) before processing. (4-3) End-processed cross-sectional view of the laminated panel blank (B) of the present invention. (4-4) Cross-sectional view of the blank (B) before processing. (4-5) End-processed cross-sectional view of the laminated panel blank (B) of the present invention. (4-6) A cross-sectional view of the blank (B) before processing. (4-7) End-processed cross-sectional view of the laminated panel blank (B) of the present invention. (4-8) Cross-sectional view of the blank (B) before processing. (4-9) End-processed cross-sectional view of the laminated panel blank (B) of the present invention. (4-10) A cross-sectional view of the blank (B) before processing. (4-11) End-processed cross-sectional view of the laminated panel blank (B) of the present invention. (4-12) A cross-sectional view of the blank (B) before processing. (4-13) End-processed cross-sectional view of the laminated panel blank (B) of the present invention. (4-14) Cross-sectional view of the blank (B) before processing. (5-1) A preferred embodiment of the laminated panel blank (B) of the present invention. (5-2) A perspective view of a returnable container obtained by bending the blank (B).

Explanation of symbols

(A) --- Conventional laminated panel blank.
(A ') --- Blank folded body.
(B) --- The laminated panel blank of the present invention.
(B ') --- Blank folded body.
(C) --- Returnable container of the present invention.
W ₀ , W ₀ ′, W ₀ ″ —Maximum width of each ruled line of the conventional laminated panel blank.
W ₁ ――――― Maximum width of each ruled line of the laminated panel blank of the present invention.
W ₂ ――――― Thickness of laminated panel blank.
L ₀ , L ₀ ′, L ₀ ″ —Each sheet extension of conventional laminated panel blanks.
L ₁ ――――― Each sheet extension of the laminated panel blank of the present invention.
(A) ―――― Double-sided, single-sided sheet.
(A ')-The above-mentioned folded sheet.
(B) --- This composite sheet.
(B ')-The above folded sheet.
e ―――――― Bottom part.
f ―――――― Side wall.
g ―――――― The side wall.
h ―――――― Side wall flap.
i ―――――― The lid.
j ―――――― The lid flap part.
k ―――――― Tightening belt.
l ―――――― Eyelet.
1 ―――――― Liner.
1 '---- finish liner.
2 ―――――― The core of a straight corrugated body.
2 ′ ——— Meandering corrugated core 3 ——— Outline.
4 ―――――― Thin solid line.
5 ―――――― Short cycle dotted line.
6 ―――――― Long cycle dotted line.
7 ―――――― ○ mark

Claims (4)

Compound leaf provided with substantially the same and common specifications related to the shape of the contour, dimensions and cuts, cutouts, shapes, dimensions and ruled lines, unit price, flat / cross-sectional shape, and dimensions A laminated panel blank obtained by integrally bonding material sheets as a main material. _2. The ruled line portion according to claim 1, wherein the ruled line portion is provided as the maximum ruled line width W ₁ larger than the laminated panel blank thickness W ₂ × 2 × 3/4. 該罫line of claim 1 or 2 wherein the wherein the provided so as not integrally pasted to each other at some or all of the material sheet該罫line maximum width W ₁ site biplane. The outline, the notch, and the cutout are formed with the same specifications for layout, shape, and dimensions by punching, and various specifications for layout, unit price, flat / cross-sectional shape, and dimensions. The laminated panel is characterized in that it is obtained by processing the pre-bonding treatment with the double-leaf material sheet provided with the ruled line portion formed in the same common, and then bonding them together by crimping. Blank manufacturing method.

Images