JP4662440B2 - Front opened paper box - Google Patents

Description

  The present invention performs an opening to form an opening not only on the top plate of the paper box but also on the front plate by an operation of pulling up the cover plate bonded to the opening piece defined by the cutting line of the front plate of the paper box. The present invention relates to a front opened paper box that facilitates taking out stored confectionery, food, and the like.

Conventionally, of the peripheral wall standing from the rectangular bottom plate, the top plate and the cover plate are extended from the back plate, and the cover plate is attached to the opening piece portion where a cut line is formed in the upper end portion of the front plate and the section is formed. The paper box formed by wearing is widely used as a carton for confectionery, food, especially chocolate confectionery, and the opening piece at the upper end of the front plate is simultaneously separated by the opening operation by pulling up the cover plate, the upper end of the front plate Since the opening is formed in the part, the stored contents can be easily taken out. The opening piece is perforated by a planned cutting line, that is, a cut line partially provided with a connecting portion. When the strength of the connecting portion is strong or the adhesion of the adhesive portion of the cover plate is weak, the opening piece Is not separated, i.e., the paper part of the cover plate or opening piece is delaminated, or the adhesive part of the cover plate is peeled off, and the opening is not formed on the front plate. In order to solve this problem, the knob is extended to the cover plate (front cover), and the fold line at the base of the knob is positioned between the lowermost end of the adhesive part and the joint below the cut line. In contrast, there has been proposed a structure in which a lot of pulling force in the vertical direction works, and the cut line can be reliably cut off to form an opening (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 9-48427

  However, the above-mentioned structure requires a grip piece on the extension of the cover plate, and it is necessary to increase the material to be used even though it is a part. If the opening operation is performed using the lower part of either side of the cover without opening, the distance from the starting part of the opening operation to the adhesive part is far, so the cut line that forms the opening piece More effective opening and opening due to the action of peeling the adhesive part between the cover plate and the opening piece than the action of separating the connecting part, or the delamination action of the paper at the adhesive part. There was a drawback that it could not be formed.

  Accordingly, an object of the present invention is to solve the above-described problem, and does not require an additional structure, and the cutting line connecting portion can be connected even when the cover plate is opened from an arbitrary cue position. An object of the present invention is to provide a front opening paper box capable of forming an opening of a front plate by separation.

  In order to solve the above-mentioned problems, the invention of claim 1 is characterized in that a front plate, both side plates, and a back plate that are erected from a rectangular bottom plate each constitute a peripheral wall, and a fold line is interposed on an upper extension of the back plate. A top plate and a cover plate are arranged in order, and an opening piece that is partitioned by a substantially U-shaped or laterally substantially U-shaped cutting line that is closed at the bottom and opened at the top is arranged near the upper end of the front plate. And has a seam at both ends of the lower side of the cutting line of at least the substantially U-shape or the laterally substantially U-shape, and the cover plate is bonded to the opening piece. In a paper box in which an opening piece is cut off from the front plate and an opening is formed at an upper end portion of the front plate, a substantially L-shaped cut is formed with bent portions facing downward on both sides of the lower end of the bonding portion in the opening piece. It is a front opening paper box characterized by having perforated eyes.

  The front unsealed paper box of the present invention has a substantially L-shaped cut line with a bent portion facing downward at both lower ends of the lower part of the opening to be bonded in the opening piece. Also by the opening operation using the lower part, the substantially L-shaped cut line part is pulled up at the same time, and along with this, one side end part of the opened piece is pulled up, and the opening by cutting the joint of the planned cutting line Part formation is possible, and the state where the adhesive part between the cover plate and the opening piece is peeled off as seen in the prior art occurs, and further, delamination of the paper at the adhesive part occurs, There is an effect that the phenomenon that the effective opening and the opening cannot be formed does not occur, and the opening operation from an arbitrary clue position of the cover plate can be performed. In addition, since the cover plate does not require an additional structure such as a picking piece to be used as a clue for opening, it does not increase the cost due to an increase in the area of the paper to be used, and a paper box excellent in economic efficiency is supplied. There is an effect that can be.

  The present invention will be described in detail below with reference to the drawings. FIG. 1 is a developed plan view showing a blank state of an embodiment of a front opening paper box according to the present invention. Fig.2 (a) is a perspective view for description which shows the assembly completion state of an Example similarly. FIG.2 (b) is a perspective view for description which shows the opening completion state of an Example similarly. FIG. 3A is an explanatory partial schematic view showing the upper half of the paper box before opening. FIG. 3B is a schematic cross-sectional view taken along the line XX for explanation showing the state at the time of opening. FIG. 4 is a developed plan view showing a blank state of another embodiment according to the present invention.

  FIG. 1 is a developed plan view showing a blank state of an embodiment of a front-opening paper box according to the present invention. A blank 20 formed by punching a sheet material such as paperboard is folded via a folding line. The laminating plate 11, the back plate 5, the side plate 4, the front plate 3, and the side plate 2 are arranged in order, and the upper and lower ends of the side plates 2 and 4 are respectively provided with ear pieces 13, 13 ', 9, 9 via folding lines. 'Is continuously provided, and the top plate 12 and the bottom plate 1 are connected to the upper and lower ends of the front plate 3 via fold lines, respectively, and the bottom surface plate 10 is connected to the lower end of the back plate 5 via the fold lines. Similarly, a top plate 6 and a cover plate 7 are connected to the upper end of the back plate 5 via a fold line. An opening piece 8 defined by a broad, substantially U-shaped cutting planned line 14 drilled above the center of the front plate 3 is disposed, and side joints are formed on the left and right sides of the cutting planned line 14. 16, 16 ′, and similarly, lower side joints 15 and 15 ′ are provided on the lower side. In the substantially central part of the opening piece 8, a horizontally long strip-like adhesion point 17 is shown, and on both sides of the lower end of the adhesion point 17, a substantially L-shaped cut line A, A with bent portions facing downwards, respectively. 'Is drilled.

FIG. 2A is a perspective view for explaining the assembly completion state of the embodiment. When the blank 20 is assembled and molded, a part of the blank 20 is not shown in the figure, but from each side of the rectangular bottom plate 1. A front plate 3, side plates 2, 4, and a back plate 5 are erected to form a peripheral wall, and a top plate 6 extending from the back plate 5 is overlapped with the front plate 3. The top plate 6 is closed by superposition and the cover plate 7 further extended from the top plate 6 is superposed and bonded to the opening piece 8 disposed at the upper part of the front plate 3 to complete the assembly. It is what it shows.
FIG. 2B is an explanatory perspective view showing the opened state of the embodiment. FIG. 2B shows the opening piece 8 by separating the planned cutting line 14 by pulling up the cover plate 6 from an arbitrary clue position from the assembled state. The superposed top plate 12 is separated from the back surface of the cover plate 7 and the top plate 6 in an adhesive state to form an opening on the top surface of the paper box and the upper front portion. By opening the top surface and the front upper part of the paper box, the stored contents can be easily taken out as compared with a paper box in which only the top surface that is generally used is open.

FIG. 3A is an explanatory partial schematic view showing the upper half of the paper box before opening, and is a perspective view showing a state in which the cover plate 7 is bonded to the upper half of the front plate 3. The cut line 14, the cut lines A and A ′, and the bonding point 17 to be seen through are indicated by dotted lines. Further, the XX line passes from the left end of the paper box through the lower left corner of the cover plate 7 to the intersection T with the lower left corner of the planned cutting line 14, the intersection S with the bent portion of the left cut line A ', A line extending from the left end of the planned bonding point 17 to the approximate center of the upper end of the paper box, showing the pulling operation direction for opening with the left lower end corner of the cover plate 7 as a clue position. The point U is the right end point of the cut line A ′, and the point V is also the upper end point.
That is, FIG. 3B is a schematic cross-sectional view taken along the line X-X for explanation showing the state at the time of unsealing. The cut line A ′ bent portion bonded at the point is also raised and the intersection S portion is raised, and the right end point U of the cut line A ′ is also raised accordingly, and the force is transmitted by moving the opening piece 8, and the joint 15 and 16 are cut off, and the intersection point T of the planned cutting line 14 is cut off. In the case where the cut line A ′ is not provided as in the prior art, the position of the planned bonding point 17 from the position of the crossing point T. However, in the present invention, the pulling force does not appear in the right end point U of the cut line A ′ and the upper end point V that does not appear in the sectional view. By acting on the upward movement, the seam 5 and 16 disconnect the one in which it is possible.
Although the opening operation from the lower left end portion of the cover plate 7 has been described, the same is true from the lower right end portion, and the description thereof will be omitted. In addition, the opening from the lower center portion acts on the connecting portions 15, 15 ′ on both sides directly from the central portion of the planned cutting line 14 as in the prior art, so that there is an obstacle to the opening formation by separating the opening pieces. There is no.

  FIG. 4 is a developed plan view showing a blank state of another embodiment according to the present invention, which is configured by removing the superposed top plate 12 extending from the above-described embodiment to the upper end of the front plate 3, The structure of the top surface portion is only the top surface plate 6 and the strength surface is relatively lowered. However, in the assembling process of the paper box, the adhesion of the top surface portion can be omitted, and the labor can be saved and the cost can be reduced by reducing the paper used. It has an economic effect.

The expansion | deployment top view which shows the blank state of the Example of the front opening paper box based on this invention. (A) The explanatory perspective view which similarly shows the assembly completion state of an Example. (B) The explanatory perspective view which similarly shows the opening completion state of an Example. (A) Explanatory partial schematic diagram showing upper half of paper box before opening (b) Explanatory XX cross-sectional schematic diagram showing the state at the time of opening. The expansion | deployment top view which shows the blank state of the other Example which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bottom plate 2, 4 Side plate 3 Front plate 5 Back plate 6 Top plate 7 Cover plate 8 Opening piece 9, 9 'Ear piece 10 Superposition bottom plate 11 Bonding plate 12 Polymerization top plate 13, 13' Ear piece 14 Scheduled cutting line 15, 15 'Lower side seam 16, 16' Side side seam 17 Adhesive 20 Blank A, A 'Cut line

Claims (1)

The front plate, both side plates, and the back plate that are erected from the rectangular bottom plate each constitute a peripheral wall, and the top plate and the cover plate are arranged in order on the upper extension of the back plate via a fold line, respectively. In the vicinity of the upper end of the face plate, an opening piece defined by a substantially U-shaped or laterally substantially U-shaped cutting line that is closed at the bottom and opened at the top is disposed, and at least the substantially U-shaped or laterally approximately U-shaped. Having a seam at both ends of the lower side of the cutting line of the shape, the cover plate is bonded to the opening piece, the opening piece is separated from the front plate by a lifting operation of the cover plate, A paper box for forming an opening at an upper end portion, wherein a front-opening paper box having substantially L-shaped cut lines each having a bent portion facing downward at each of the lower ends of the bonding portion in the opening piece. .

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