JP3774737B2 - Paper box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper box that forms a square space by folding a sheet of paper material.
[0002]
[Prior art]
The above paper boxes are used for mailing thick documents and books, mailing floppy disks and videotapes together with documents, etc., and for home delivery such as pizza pie. A sheet of paper material is cut in a complicated manner to form a fold line of mountain fold or valley fold, and this is skillfully folded to form a square space, and a piece of paper is inserted into a cut or cut In some cases, the folding lid plate is closed by a locking means for meshing each other.
[0003]
However, in a paper box with such a structure, the shape of the paper material and the folding line are complicated, and the paper material is devised and cut and troublesome locking is required. Despite the fact that the lid plates are closed together, there is anxiety that the lid plate will open with this alone, and since it can not withstand mailing, the folding lid plate is currently taped, and the paper material It is useless to take the trouble of complicated cutting and troublesome locking.
[0004]
The box side plate is strong even if it is single, so there is no problem, but the box lid plate and bottom plate that are easily bent by the pressing force are single, for example, floppy disk or video tape If the object to be stored is fragile, it is fatal. From this, the cover plate is made as double as possible by skillful cutting and folding of the paper material. Was about the cover plate, and I couldn't have hoped for a double bottom plate.
[0005]
And even with this lid plate, the entire surface cannot be made almost double, and forming a slit or a piece of paper to be inserted into the slit is accompanied by a decrease in the strength of the lid plate. Literally, it could not have a double structural strength.
[0006]
In the present invention, when the folding lid plate is provided with a lid closing function, it is finally necessary to tape the lid plate, and it means that the paper box has a lid closing function. It was made with the fact that there is no such thing, and even if it says almost the lid plate and the bottom plate by a simple technique that only forms a simple cut and fold line on a piece of paper material The purpose of this paper is to provide a paper box that has a double structure to the extent that it is not an exaggeration.
[0007]
[Means for Solving the Problems]
The technical means taken by the present invention in order to achieve the above object are as follows. That is,
[0008]
The paper box according to the first invention is formed by forming a paper surface portion for reinforcing the edge of the box bottom plate adjacent to the straight valley fold line on a sheet of paper material, and reinforced in a state of being connected to the valley fold line. Slits of approximately the same width as the paper surface are formed on both sides of the paper surface, and on the opposite side of the valley fold line across the reinforcing paper surface, from the back corner of one slit to the middle of the reinforcing paper surface. In addition, a cut line parallel to the valley fold line is formed, a second cut line is formed at an angle of 45 degrees from the end of the cut line, and a mountain fold line is formed at an angle of 45 degrees from the back corner of the other slit. , Formed so as to cross each other, folded the paper portions on both sides with the valley fold line between the valley fold line and the mountain fold line, and reversed the paper portions on both sides by 90 degrees to overlap each other, this overlapping square The paper surface of the box is the box bottom plate, and it is stretched around the box bottom plate. Was the paper section, so as to form a respectively join side plate folding cover plate, twice, and a valley fold is characterized in that to form a rectangular space.
[0009]
[0010]
The paper box according to the second aspect of the present invention is formed on a single sheet of paper material, a paper surface portion having a size that allows the upper and lower or left and right box side plates to refrain from the box edge, adjacent to the straight valley fold line, A slit having the same width as that of the recording paper surface portion is formed on both sides of the recording paper surface portion in a state of being connected to the valley folding line, and one side of the recording paper surface portion opposite to the valley folding line is sandwiched between the recording paper surface portion and one of the recording paper surface portions. A notch that is parallel to the valley fold line is formed from the rear corner of the slit to the middle of the reinforcing sheet surface, the second slit is formed at an angle of 45 degrees from the end of the notch, and the inner corner of the other slit. Are formed so that the mountain fold lines intersect each other at an angle of 45 degrees from each other, and the paper sections on both sides are folded between the valley fold lines and the mountain fold lines with the valley fold lines interposed therebetween. Invert and superimpose, and this overlapping square paper part is the bottom of the box A manner, the paper portion which projects from the periphery of the box bottom plate, so as to form a respectively join side plate folding cover plate, twice, and a valley fold it is characterized in that to form a rectangular space.
[0011]
In any of the above inventions, the paper portion at the top of the valley fold line is superimposed on the paper portion at the bottom of the valley fold line while being inverted by 90 degrees, thereby forming a single triangular portion by the valley fold line and the mountain fold line. However, a box bottom plate that is almost doubled on the entire surface is formed, and the paper surface portion that protrudes from the periphery of the box bottom plate is valley-folded twice so that the box side plate and the double folding lid plate Is formed.
[0012]
In the paper box according to the first invention, a reinforcing paper surface portion is formed on one side edge of the box bottom plate so that the strength of the box bottom plate is increased. Is formed in the middle of the reinforcing sheet surface portion, even if the box size is increased in the valley fold line direction, the single portion of the triangle of the box bottom plate can be reduced in area.
[0013]
On the other hand, in the paper box according to the second aspect of the invention, the upper and lower or left and right box side plates are formed to be less than the box edge so that the edges of the folding cover plate are fastened with staples. However, the stapling can be easily performed by inserting the staple into the recess, and the strength of the box bottom plate is increased by folding back the side of the box on one side edge of the box edge. Is done.
In particular, in the paper box according to the second invention, as in the first invention, even if the box size is increased in the valley fold line direction, the single portion of the triangle of the box bottom plate can be reduced in area.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figure 1 shows a box made of paper, boxes made of this paper, there shall by forming a rectangular space by folding a piece of paper material, in this embodiment, and the top and bottom of the box to the opposite The postal code entry field 2 is printed on the surface of the double box bottom plate 1 at the time, and as shown in FIG. 2, for example, the storage bag 4 of the floppy disk 3 is provided on the inner surface of the lid, and then the destination The floppy disk 3 can be mailed together with documents and the like.
[0015]
The paper box is manufactured as follows. That is, as shown in FIG. 3, three pieces of rectangular thick first box bottom plate 1 a are set on a thick paper material 5 cut out in a rectangular shape by the lower edge of the paper material 5. And the vertical width C of the paper surface portion 5a above the valley fold line a is substantially the same as the horizontal width D of the first box bottom plate 1a. Is set.
[0016]
The cut lines c and c are formed in a state of being linearly connected to both ends of the valley fold line a, while the paper surface portion 5a above the valley fold line has an angle of 45 degrees from the end of the valley fold line a. The left and right box side plates 6a, 6a are formed on the paper surface portion 5b below the valley fold line by two left and right valley fold lines b, b. Are formed, and the width dimension of the paper portion 5c on the left and right outer sides of the valley fold line f is more than half of the width dimension D on the left and right of the first box bottom plate 1a. Is set.
[0017]
Furthermore, a valley fold line h is formed on the paper surface portion 5a above the valley fold line in a state of being connected to the valley fold line b on the starting end side of the formation of the mountain fold line e, and the second box is formed by the valley fold line h. The valley fold line i for setting the bottom plate 1b is formed so that the dimension A between the lines h and i is substantially the same as the vertical dimension B of the first box bottom plate 1a, and these valley fold lines h, In order to set the upper and lower box side plates 6b, 6c by i, two valley fold lines j, j are formed outside the valley fold lines h, i.
[0018]
In this way, the cut c, d, the valley fold lines a, b, f, h, i, j, and the mountain fold line e are formed on a single sheet of paper 5 and, as shown in FIG. The paper portion 5a at the top of the fold line is folded at the valley fold line a and the mountain fold line e, and as shown in FIG.
The triangular paper surface portion 5d surrounded by the valley fold line a, the mountain fold line e, and the cut d and the second box bottom plate 1b are overlapped with the first box bottom plate 1a while being inverted.
[0019]
And the left and right paper surface portions 5c, 5c and the upper and lower paper surface portions 5e, 5f projecting from the periphery of the double box bottom plate (namely, the first and second box bottom plates 1a, 1b) 1 by this superposition, As shown in FIGS. 1, 2, and 6, the box side plates 6a to 6c and the paper surface portions 5c, 5e, and fold are folded twice based on the valley fold lines b, f, h, i, and j, respectively. A double folding cover plate 7 by 5f is formed, and thus a paper box in which a square space P is formed by folding a single paper material 5 is produced.
[0020]
In the above embodiment, in FIGS. 4 and 5, the paper surface portions 5 e and 5 f are illustrated as being mountain-folded along the line j, but the paper surface portions 5 e and 5 f are normally valley-folded along the line j and illustrated. In consideration of the fact that the drawing lines are complicated by the folding of the paper surface portions 5e and 5f, making it difficult to understand the production status of the paper box according to the present invention. It should be added that it is to be folded at the line j.
[0021]
According to the above configuration, by a very simple configuration that only forms the cut lines c, d, valley fold lines a, b, f, h, i, j, and mountain fold lines e on one sheet of paper material 5, A paper box having a structurally robust square space P in which a single bottom portion of a triangle is formed by a valley fold line a and a mountain fold line e, but the box bottom plate 1 and the folding lid plate 7 are doubled. Is produced.
[0022]
When the floppy disk 3 is mailed together with the documents, etc., the folding cover plate 7 is mutually attached as shown in FIG. 6 with the floppy disk 3 stored in the storage bag 4 and the documents stored in the rectangular space P. They are pasted together with an adhesive tape 8 or the like, and the postal code is written in the postal code entry field 2, and the destination is written or a name sticker is attached.
[0023]
The storage bag 4 of the floppy disk 3 is made of, for example, vinyl and includes a double-sided adhesive tape 4a with a release paper on the folding lid. In the embodiment, the inner side of the double folding lid plate 7 is formed. Although it is adhered to the inner surface of the paper surface portion 5e, it may be adhered to the inner surface of the box bottom plate 1.
[0024]
As shown in FIG. 7, a paper box according to the second invention similar to the paper box shown in FIG. 2 is formed if the following cuts, fold lines and slits are formed in the paper material 5. Can be produced by providing a reinforcing paper surface portion 5h at the upper edge of the first box bottom plate 1a.
[0025]
That is, three straight valley fold lines a and b for setting a rectangular first box bottom plate 1a with a lower edge of the paper material 5 on a thick paper material 5 cut into a rectangular shape. , B, and a paper surface portion for reinforcing the upper edge of the first box bottom plate 1a (shown by a stitch for clarity) 5h is formed above the valley fold line a. Also, the upper and lower width dimensions of the upper paper surface portion 5a are set to be substantially the same as the left and right width dimensions of the first box bottom plate 1a, and slits having approximately the same width as the paper surface portion 5h are formed on both sides of the paper surface portion 5h. 9 and 9 are formed.
[0026]
A notch m that is parallel to the valley fold line a is formed from the upper corner of one slit 9 to the middle of the reinforcing sheet surface portion 5h, and the second angle is formed at an angle of 45 degrees from the end of the notch m. A notch d and a mountain fold line e at an angle of 45 degrees from the upper upper corner of the other slit 9 are formed on the paper surface portion 5a at the upper part of the valley fold line so as to cross each other, and at the lower part of the valley fold line Two valley fold lines f, f for setting the left and right box side plates 6a, 6a are formed on the sheet surface portion 5b, and the width dimension of the sheet surface portion 5c on the outer left and right sides of the valley fold line f is set to the first dimension. Set to half or more of the left and right width dimensions of the box bottom plate 1a.
[0027]
In addition, the sheet fold line e is formed on the upper surface of the valley fold line 5a with a dimension that is parallel to the line n obtained by extending the valley fold line b on the starting end side of the mountain fold line e and is approximately the same width as the slit 9. The valley fold line h is formed, and the valley fold line i for setting the second box bottom plate 1b is defined by the valley fold line h. The dimension between the lines h and i is the vertical dimension of the first box bottom plate 1a. In order to set the upper and lower box side plates 6b and 6c by these valley fold lines h and i, two valley folds are formed outside the valley fold lines h and i. Lines j and j are formed.
[0028]
As shown in FIG. 8, the slit 9, the cuts m and d, the valley fold lines a, b, f, h, i, j, and the mountain fold line e are formed on one sheet of the paper material 5. In addition, the paper surface portion 5a at the upper part of the valley fold line is folded at the valley fold line a and the mountain fold line e, and the paper surface portion 5a for reinforcement is reversed by 90 degrees while reversing the paper surface portion 5a at the upper part of the valley fold line. The part 5d and the second box bottom plate 1b are overlapped with the first box bottom plate 1a.
[0029]
Then, the left and right paper surface portions 5c, 5c and the upper and lower paper surface portions 5e, 5f protruding from the periphery of the double box bottom plate 1 by the superposition are respectively based on valley fold lines b, f, h, i, j. Then, the sheet material 5 is folded by forming a valley fold twice to form the upper, lower, left, and right box side plates 6a to 6c and the double folding cover plate 7 by the paper surface portions 5c, 5e, and 5f. Thus, a paper box in which a square space P is formed can be produced.
[0030]
According to the paper box having the configuration according to the first invention, the reinforcing paper surface portion 5h is formed on the upper edge of the first box bottom plate 1a so that the strength of the box bottom plate 1 is increased. In addition to the fact that the cut m that is parallel to the valley fold line a is formed in the middle of the reinforcing sheet surface portion 5h, even if the box size is increased in the valley fold line direction, the single portion of the triangle of the box bottom plate 1 is the area. Can be made smaller.
[0031]
As shown in FIG. 9, when the following cuts, fold lines and slits are formed in the paper material 5, as shown in FIG. 11, the upper and lower box side plates 6b and 6c are made to refrain from the box edge r . Paper boxes can be made.
[0032]
That is, three straight valley fold lines a and b for setting a rectangular first box bottom plate 1a with a lower edge of the paper material 5 on a thick paper material 5 cut into a rectangular shape. , B are formed, and a paper surface portion (i.e., shown in a stitch for clarity) 5i is formed on the upper portion of the valley fold line a, and the upper paper surface. The upper and lower width dimensions of the portion 5a are set to be substantially the same as the left and right width dimensions of the first box bottom plate 1a, and on both sides of the paper surface portion 5i, the same width as the reserved dimension width of the box side plate 6b (that is, Slits 9 and 9 having the same width as the paper surface portion 5i are formed.
[0033]
Then, on the paper surface portion 5a at the upper part of the valley fold line, a cut line d and a mountain fold line e that intersect each other at an angle of 45 degrees from the upper upper corner of each slit 9, 9 are formed, and the paper surface portion at the lower part of the valley fold line 5b is formed with two valley fold lines f and f for setting the left and right box side plates 6a and 6a, and the width dimension of the paper surface portion 5c on the left and right outside of the valley fold line f is set to the first box. Set to half or more of the left and right width dimensions of the bottom plate 1a.
[0034]
Furthermore, a valley fold line h is formed on the paper surface portion 5a above the valley fold line in a state of being connected to the valley fold line b on the starting end side of the formation of the mountain fold line e, and the second box is formed by the valley fold line h. A valley fold line i for setting the bottom plate 1b is formed on the paper surface portion 5a, and the dimension between the lines h and i is a dimension obtained by subtracting the size of the box side plates 6b and 6c from the vertical dimension of the first box bottom plate 1a. And two valley fold lines j and j are formed outside the valley fold lines h and i in order to set the upper and lower box side plates 6b and 6c by these valley fold lines h and i. .
[0035]
Thus, the slit 9, the cut d and the valley fold lines a, b, f, h, i are formed on a single sheet of paper material 5.
, J and the mountain fold line e, and as shown in FIG. 10, the paper surface portion 5a at the top of the valley fold line is folded at the valley fold line a and the mountain fold line e, and the paper surface portion 5a is turned 90 degrees. While reversing, the paper portion 5i for recording, the triangular paper portion 5d, and the second box bottom plate 1b are overlapped with the first box bottom plate 1a.
[0036]
Then, the left and right paper surface portions 5c, 5c and the upper and lower paper surface portions 5e, 5f protruding from the periphery of the double box bottom plate 1 by the superposition are respectively based on valley fold lines b, f, h, i, j. Then, the valley folding is performed twice to form the upper, lower, left and right box side plates 6a to 6c and the double folding lid plate 7 by the paper surface portions 5c, 5e, and 5f, as shown in FIG. A paper box in which a square space P is formed by folding a sheet of paper material 5 can be produced.
[0037]
According to this box made of paper, the upper and lower box side plate 6b, 6c is that formed ahead than Hakotan'en r, of the folding lid plate 7, the paper portion 5c superimposed on the upper side, 5c The upper and lower end edges of the staples can be easily fixed by the staple 10 by inserting the staples into the recesses.
Moreover, the strength of the box bottom plate 1 can be increased by forming the holding paper surface portion 5i for holding the box side plates 6b, 6c back to one side edge of the box edge r.
[0038]
As shown in FIG. 12, a paper box according to the second invention similar to the paper box shown in FIG. 11 is formed if the following cuts, fold lines and slits are formed in the paper material 5. Can be produced.
[0039]
That is, three straight valley fold lines a and b for setting a rectangular first box bottom plate 1a with a lower edge of the paper material 5 on a thick paper material 5 cut into a rectangular shape. , B are formed, and a paper surface portion 5i corresponding to the storage size of the box side plate 6b is formed on the upper portion of the valley fold line a, and the upper and lower width dimensions of the paper surface portion 5a above this are set as the first box bottom plate. The slits 9 and 9 having the same width as the reserved dimension width of the paper surface portion 5i are formed on both sides of the paper surface portion 5i.
[0040]
A cut m parallel to the valley fold line a is formed from the upper corner of the slit 9 to the middle of the paper surface 5i, and the second cut is formed at an angle of 45 degrees from the end of the cut m. d and a fold line e with an angle of 45 degrees from the upper upper corner of the other slit 9 is formed on the paper surface portion 5a at the top of the valley fold line so as to cross each other, and the paper surface at the bottom of the valley fold line In the portion 5b, two valley fold lines f, f for setting the left and right box side plates 6a, 6a are formed, and the width dimension of the paper surface portion 5c on the left and right outside of the valley fold line f is set to the first box. Set to half or more of the left and right width dimensions of the bottom plate 1a.
[0041]
Furthermore, a valley fold line h is formed on the paper surface portion 5a above the valley fold line in a state of being connected to the valley fold line b on the starting end side of the formation of the mountain fold line e, and the second box is formed by the valley fold line h. A valley fold line i for setting the bottom plate 1b is formed on the paper surface portion 5a, and the dimension between the lines h and i is a dimension obtained by subtracting the size of the box side plates 6b and 6c from the vertical dimension of the first box bottom plate 1a. And two valley fold lines j and j are formed outside the valley fold lines h and i in order to set the upper and lower box side plates 6b and 6c by these valley fold lines h and i. .
[0042]
Thus, after forming the slit 9, the cut d, the valley fold line a, b, f, h, i, j and the mountain fold line e on one sheet of the paper material 5, as shown in FIG. The paper surface portion 5a at the top of the valley fold line is folded at the valley fold line a and the mountain fold line e, and the paper surface portion 5a, the triangular paper surface portion 5d and the second box are reversed while the paper surface portion 5a is inverted by 90 degrees. The bottom plate 1b is overlaid on the first box bottom plate 1a.
[0043]
Then, the left and right paper surface portions 5c, 5c and the upper and lower paper surface portions 5e, 5f protruding from the periphery of the double box bottom plate 1 by the superposition are respectively based on valley fold lines b, f, h, i, j. Then, the sheet material 5 is folded by forming a valley fold twice to form the upper, lower, left, and right box side plates 6a to 6c and the double folding cover plate 7 by the paper surface portions 5c, 5e, and 5f. Thus, a paper box in which a square space P is formed can be produced.
[0044]
According to a box made of paper of the second invention or Ru configuration, by the box side plate 6b of the top and bottom, 6c are formed ahead than Hakotan'en r, superimposed paper portion 5c, 5c of The end edges can be easily fastened together with staples, and the backing sheet surface portion 5i is formed on one side edge of the box end edge r, thereby increasing the strength of the box bottom plate 1. Similarly to the second invention, the cut m that is parallel to the valley fold line a is formed in the middle of the reinforcing sheet surface portion 5h, so that even if the box size is increased in the valley fold line direction, the single triangle of the box bottom plate 1 The portion can be reduced in area.
[0045]
In each of the above-described embodiments, the width dimension of the left and right outer paper surface portions 5c, 5c of the valley fold line f is set to be half or more of the left and right width dimensions of the first box bottom plate 1a, respectively. When the paper surface portions 5c and 5c are folded on the upper side of 5j, the free end sides of the paper surface portions 5c and 5c are overlapped with each other so as to constitute the double folding cover plate 7 described above. .
[0046]
However, by reducing only the width dimension of one paper surface portion 5c or by reducing both the width dimensions of both paper surface portions 5c and 5c, the total width dimension is almost equal to the left and right width dimensions of the first box bottom plate 1a. The end portions of the paper surface portions 5c and 5c may be abutted so as to be the same, or a slight gap may be formed between the end portions of the paper surface portions 5c and 5c.
[0047]
Further, the paper surface portions 5c and 5c are folded on the upper side of the paper surface portions 5e and 5j, but the paper surface portions 5c and 5c are folded first, and the paper surface portions 5e and 5j are folded on the upper side. Well, in this case, in the embodiment, the upper and lower width dimensions of the paper surface portions 5e and 5j are set smaller than the upper and lower width dimensions of the first box bottom plate 1a. However, by setting the sum of the upper and lower width dimensions of the paper surface portions 5e and 5j to be the same as or larger than the upper and lower width dimensions of the first box bottom plate 1a, the free end side of the paper surface portions 5e and 5j is set. They can be brought into contact with each other or overlapped with each other, so that the adhesive tape 8 can be attached by one.
However, depending on the setting of the left and right width dimensions of the paper surface portions 5c and 5c and the vertical width dimensions of the paper surface portions 5e and 5j, the shape of the paper material 5 may not be rectangular.
[0048]
In each of the above-described embodiments, a description will be given of a mode in which a trough fold line a in the left-right direction is formed in the upper and lower intermediate portions of the paper material 5, and a triangular paper surface portion 5d is formed on the upper side of the trough fold line a. However, it is convenient for the paper box A to have directionality as described above, and a triangular paper surface portion 5d is formed on the lower side of the valley fold line a, or the paper material 5 is in the middle of the left and right sides. A vertical fold line a is formed in the section, a triangular paper surface portion 5d is formed on either the left or right side of the valley fold line a, and slits 9 and cuts c, d, By forming m, valley fold lines a, b, f, h, i, j, and mountain fold lines e, paper boxes of various modes can be produced with predetermined orientation.
[0049]
【The invention's effect】
As described above, in both the first and second inventions, it is necessary to stop the folding lid plate with a tape or staples as in the conventional case, but it is easy to use a single sheet of paper. A simple paper that forms a simple cut and fold line and folds it to form a single triangular portion, but a sturdy paper with a double box bottom plate and folding lid plate A box made of steel can be provided at low cost.
[0050]
In particular, in the first invention, the strength of the box bottom plate can be increased, and the triangular portion of the box bottom plate can be reduced.
In the second aspect of the invention, the concavity is formed in one of the top, bottom, left and right of the box, so that the folding lid plate can be easily fixed by stapling, and the surface of the conserving paper contributes to increasing the strength of the box bottom plate. Further, in the second invention, the single portion of the triangle of the box bottom plate can be made small as in the first invention.
[Brief description of the drawings]
FIG. 1 is a perspective view of a paper box upside down.
FIG. 2 is a vertical side view of a paper box.
FIG. 3 is a perspective view of a paper material for making a paper box.
FIG. 4 is a perspective view showing a state in the middle of folding a paper material.
FIG. 5 is a perspective view showing a state in which the first and second box bottom plates are superposed.
FIG. 6 is a perspective view of a paper box finally taped with a folding lid.
7 is a perspective view of a paper material for producing a paper box according to the first invention. FIG.
FIG. 8 is a perspective view showing a state in which the first and second box bottom plates are superposed.
FIG. 9 is a perspective view of a paper material for the production box made of paper.
FIG. 10 is a perspective view showing a state in which the first and second box bottom plates are superposed.
FIG. 11 is a perspective view of a paper box in which a folding lid is fixed with staples.
FIG. 12 is a perspective view of a paper material for producing a paper box according to the second invention.
FIG. 13 is a perspective view showing a state in which the first and second box bottom plates are superposed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Box bottom board, 5 ... Paper material, 5a ... Paper surface part of upper part of valley fold line, 5b ... Paper surface part of lower part of valley fold line, 5h ... Paper surface part for reinforcement, 5i ... Reservation paper surface part, 6a-6b ... Box side board , 7 ... folding lid plate, 9 ... slit, a ... valley fold line, c, d, m ... cut, e ... mountain fold line, P ... square space.

Claims (2)

Form a paper surface portion for reinforcing the edge of the box bottom plate adjacent to the straight valley fold line on a sheet of paper material , and this paper surface portion on both sides of the reinforcing paper surface portion in a state of being connected to the valley fold line. A slit having approximately the same width is formed, and is parallel to the valley fold line from the back corner of one slit to the middle of the reinforcement sheet surface portion on the sheet surface portion opposite to the valley fold line across the reinforcement sheet surface portion. In addition to forming a cut, a second cut is formed at an angle of 45 degrees from the end of the cut, and a mountain fold line is formed at an angle of 45 degrees from the back corner of the other slit so as to cross each other. Fold both sides of the paper between the valley fold line and the mountain fold line, invert the paper portions on both sides by 90 degrees and overlap each other, and use this overlapping square paper portion as the box bottom plate. Each piece of paper that protrudes from the periphery of the box bottom plate So as to form a cover plate and folding plate, twice, valley fold to, boxes made of paper, characterized in that the formation of the rectangular space. Paper copy on a sheet of paper material, side by side on the straight valley fold line, at the top and bottom or left and right of the box side plates to form a paper portion of the dimension of which makes refrain than the box edge, Tsuraneru the valley fold line state on either side of the section to form a slit between Ho Isuzu same width the copy paper section, the paper surface portion opposite to the valley fold line across a copy sheet surface portion, the middle of the reinforcing sheet surface from the back corner of one of the slits In addition, a cut line parallel to the valley fold line is formed, a second cut line is formed at an angle of 45 degrees from the end of the cut line, and a mountain fold line is formed at an angle of 45 degrees from the back corner of the other slit. , Formed so as to cross each other, folded the paper portions on both sides with the valley fold line between the valley fold line and the mountain fold line, and reversed the paper portions on both sides by 90 degrees to overlap each other, this overlapping square The paper surface of the box is the bottom plate, and the area around this box bottom plate Et overhanging the paper section, so as to form a respectively join side plate folding cover plate, twice, valley fold to, boxes made of paper, characterized in that the formation of the rectangular space.

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