JP2004299732A - Paper-made box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate assembly of a box by keeping a lid left opened. <P>SOLUTION: This paper-made box is composed of one blank. A front and rear side sheets 2 and 3 are continuously formed at the front and rear ends of a bottom sheet 1; a main lid sheet 4 or an auxiliary lid sheet 5 is continuously provided at the upper edges of both the side sheets 2 and 3; left and right side sheets 6 and 7 are continuously provided at both the side edges of the bottom sheet 1 and those of the lid sheet 4; and they are folded inward to constitute the box 10. A crease (r) along a whole lateral length is formed near the rear edge of the sheet 5, and the sheet 5 is stuck on an opening piece 8 surrounded by a perforation (a) and provided in the sheet 4. When the sheet 5 is raised via the crease (r), the opening piece 8 is cut from the sheet 4, so that the box can be opened. A part of the perforation (a) is formed along the same line as the crease (r) of the sheet 5; a fixing piece 11 is formed by using a cut line (b) ahead of the crease (r) of the sheet 5; a locking piece 12 extended backward is formed at the rear edge of the opening piece 8; and when the sheet 5 is raised, a leading edge of the fixing piece 11 abuts on a top surface of the locking piece 12 so as to keep the sheet 5 raised. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a paper box with a lid for storing confectionery and the like.
[0002]
[Prior art]
As a conventional paper box with a lid, for example, there is one described in Patent Document 1. As shown in FIG. 10, this paper box 20 has front and rear side plates 22, 23 and left and right side plates 26 'with respect to a bottom plate 21. , 27 ′ are raised, and the main lid plate 24 connected to the upper edge of the front side plate 22 is bent inward through the fold line r at the upper edge of the main lid plate 24. In addition, the sub lid plate 25 continuously provided on the upper edge of the rear side plate 23 is bent inward via the fold line r of the upper edge of the rear side plate 23, and further, the front lid at the front end of the sub lid plate 25. The wall 30 is bent downward through the fold line r, and the front wall 30 is overlapped with the front side plate 22. A tongue piece 29 is continuously provided on both side edges of the front and rear side plates 22 and 23, and the tongue piece 29 is bent inward through a fold line r, and in this state, the left and right side plates 26 'and 27'. Then, the left and right side plates 26 and 27 raised from the main lid plate 24 are overlapped, closed, and bonded to each other to form the box 20.
[0003]
From the main cover plate 24 to the front side plate 22, an open piece 28 is provided which is surrounded by three perforations aside from the rear, and the outer surface of the open piece 28 is attached to the inner surfaces of the sub cover plate 25 and the front wall 30. Are combined.
[0004]
The sub lid plate 25 is provided with a fold line r extending across the entire length in the lateral direction between the upper end edge of the rear side plate 23 near the rear end and the rear end edge of the open piece 28. In FIG. 25, a locking piece 32 projecting rearward from a fold line r over the entire length in the lateral direction is formed by a cut line e, and the locking piece 32 overlaps the upper surface of the main lid plate 24. Has become.
[0005]
As shown in FIG. 9, the sub-cover plate 25 and the opening piece 28 are erected from the main cover plate 24 through the horizontal fold line r, so that the opening piece 28 is mainly connected through the perforation a. The box body 20 is opened by being cut off from the cover plate 24 and the front wall 25. At this time, the front end of the locking piece 32 protruding backward pushes down the contacting portion while contacting the upper surface of the main lid plate 24, and moves forward from the rear of the box body to the open piece. When the opening degree of the main cover plate 24 exceeds 90 °, the locking piece 32 is pushed up by the restoring force of the main cover plate 24. By this pushing up, the opening piece 28 is urged to incline rearward, and the upright state of the sub lid plate 25 and the opening piece 28 is maintained.
[0006]
[Patent Document 1]
JP-A-11-321855
[Problems to be solved by the invention]
In this paper box, the locking piece 32 is provided on the sub lid plate 25, and the tip of the locking piece 32 abuts on the upper surface of the main lid plate 24, and the main lid plate 24 is moved by the arrow shown in FIG. Press down in the direction of. Therefore, when the opening and closing of the sub lid plate 25 is repeated, the contact portion of the main lid plate 24 by the locking piece 32 is distorted in a state of being lowered toward the bottom plate 21 as shown by a broken line f in the drawing. Sometimes.
[0008]
When the main lid plate 24 is distorted as described above, the main lid plate 24 has a weaker force to push up the locking piece 32, and thus the standing state of the sub lid plate 25 and the opening piece 28 is hardly maintained.
[0009]
Therefore, an object of the present invention is to prevent the function of maintaining the open state of the cover plate from being weakened when the cover plate is repeatedly opened and closed.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the paper box of the present invention is composed of one blank, and the front and rear side plates are connected to each other at the front and rear ends of the bottom plate via fold lines. A main lid plate or a sub lid plate is continuously provided through each fold line, and left and right side plates are continuously provided through both fold lines at both side edges of the bottom plate or both side edges of the main cover plate. The sub lid plate is formed with a fold line near the rear edge over the entire length in the lateral direction, and can be undulated through the fold line, and an open piece whose entire periphery is surrounded by perforations is formed on the main lid plate. Is done.
[0011]
With respect to the bottom plate, each side plate is raised through a fold line, and the main lid plate is bent inward through the fold line with respect to the front side plate, and the sub lid plate is inwardly bent through the fold line with respect to the rear side plate. And is stacked on the upper surface of the main lid plate and bonded to an open piece.
[0012]
Part of the perforation around the open piece is formed along the same line at the lateral fold line of the sub lid plate, and forward from the lateral fold line of the sub lid plate, A fixing piece is formed by the cut, and a locking piece extending rearward corresponding to the locking piece is formed on the rear edge of the open piece. For this reason, when the sub-cover plate is erected through a fold line extending over the entire length in the lateral direction, an open piece attached to the sub-cover plate is cut off from the main cover plate through a perforation, and the box is opened. At the same time, the leading edge of the fixing piece of the main lid plate abuts on the upper surface of the locking piece of the opening piece, and the sub lid plate is maintained in the upright state.
[0013]
The undulating locking piece is turned upside down, and the upper surface thereof comes into contact with the tip of the horizontal fixing piece to open the sub lid plate. Therefore, the locking piece is formed by the fixing piece and the main lid plate. Can be shifted to the open state without pressing down too much. For this reason, the opening and closing of the sub lid plate becomes lighter, and distortion of the main lid plate hardly occurs.
[0014]
In addition, since the blank forming the box is made of paper, the engagement between the locking piece and the fixing piece is made elastic, and the sub lid plate and the opening piece can be opened and closed lightly.
[0015]
Further, in the paper box having the above configuration, the locking piece is provided by a cut in the sub lid plate instead of the open piece, and is formed so as to extend rearward from the lateral fold line of the sub lid plate. The fixing piece is provided on the main lid plate by the perforation instead of the sub lid plate, and extends forward from the lateral fold line of the sub lid plate so as to correspond to the locking piece. The configuration formed in the above can also be adopted.
[0016]
By doing so, the locking piece provided on the sub lid plate is opened by pushing down the fixing piece provided on the main lid plate by the initial opening operation, but when the opened sub lid plate is rotated in the closing direction, The sub lid plate is closed with the locking piece inserted below the fixing piece. For this reason, in the opening operation of the sub lid plate after the second time, the fixing piece is not pushed down much.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 4 show one embodiment of a paper box according to the present invention. As shown in an exploded view of the blank in FIG. r, a main cover plate 4 or a sub cover plate 5 is connected to upper edges of both side plates 2 and 3 via fold lines r, respectively. Left and right side plates 6 ′ and 7 ′ are provided on both side edges via fold lines r, and left and right side plates 6 and 7 are provided on both side edges of the main cover plate 4 via fold lines r.
[0018]
The sub-cover plate 5 is formed with a fold line r over the entire length in the lateral direction near the rear edge thereof, and can be undulated through the fold line r. The entire periphery of the main cover plate 4 is surrounded by perforations a. An open piece 8 is formed. Further, tongue pieces 9 are respectively provided on both side edges of the front and rear side plates 2 and 3 via fold lines r.
[0019]
In order to assemble this blank into a box 10 as shown in FIG. 1, first, the tongue pieces 9 are bent inwardly through the fold lines r with respect to the front and rear side plates 2 and 3, respectively. The side plates 6 ′ and 7 ′ and the front and rear side plates 2 and 3 are respectively raised through the fold line r. Then, the main lid plate 4 is bent inward with respect to the front side plate 2 through the fold line r, and the sub lid plate 5 is bent with respect to the rear side plate 5 inward through the fold line r. Are superimposed on the bent upper surface of the main lid plate 4, and the lower surface of the sub lid plate 5 is bonded to the upper surface of the open piece 8 of the main lid plate 4. Also, the left and right side plates 6, 7 are bent inward with respect to the main lid plate 4 via the fold line r, respectively, and the side plates 6, 6 'and the side plates 7, 7' are placed in the box with the tongue pieces 9 respectively. A box 10 is obtained by stacking and attaching the pieces in the state where they are taken.
[0020]
When the box 10 is opened, as shown in FIG. 2, the sub-cover plate 5 is erected from the main cover plate 4 via a fold line r extending over the entire length in the lateral direction. At this time, the opening piece 8 bonded to the sub lid plate 5 is cut off from the main lid plate 4 through the perforation a and stands with the sub lid plate 5, so that the upper surface of the box 10 is opened.
[0021]
A portion of the perforation a around the opening piece 8 located on the rear side plate 5 side is formed along a horizontal fold line r for erecting the sub lid plate 5 along the same line. The perforation line a and the fold line r are not required to be completely on the same line, and may be slightly displaced back and forth.
[0022]
Further, a fixing piece 11 is formed forwardly from the fold line r by a cut b in the front of the lateral fold line r of the sub lid plate 5, and the fixing piece 11 is formed on a rear edge of the open piece 8. Is formed so as to protrude by a perforation a.
[0023]
As shown in FIG. 3, when the sub-cover plate 5 is erected in the direction of the arrow, the leading edge of the fixing piece 11 of the sub-cover plate 5 is brought into contact with the upper surface of the locking piece 12 of the opening piece 8 which is turned upside down. The sub lid 5 is kept in an upright state. With this configuration, the fixing piece 11 and the locking piece 12 come into contact with each other while being elastically and appropriately bent, so that the opening and closing of the sub lid plate 5 is smooth. Further, as shown in the figure, the leading edge of the fixing piece 11 abuts on the upper surface of the locking piece 12 in a substantially horizontal state to maintain the sub lid plate 5 in the open state, so that the fixing piece 11 is locked. The degree of bending depressed by the piece 12 is small.
[0024]
When closing the sub lid 5 of the box 10, the sub lid 5 in the upright state shown in FIG. 2 is laid down on the main lid 4 as shown in FIG. At this time, a cut line c is provided near the front edge of the opening piece 8 of the sub lid plate 5, and the insertion piece 13 is formed so as to protrude forward from the front edge of the opening piece 8 by the cut c. The sub lid 5 is locked to the main lid 4 by inserting the insertion piece 13 downward and forward of the main lid 4 from the perforation a at the front edge of the main lid 4. By doing so, the sub lid 5 once opened can be closed again and fixed in that state. When the function of the insertion piece 13 is not required, the insertion piece 13 and the score line c can be omitted.
[0025]
In this embodiment, the fixing piece 11 and the locking piece 12 are provided in the middle between the left and right side plates 6 and 7. However, the present invention is not limited to this embodiment, and as shown in FIGS. A configuration provided with a plurality may be employed. The installation position is not limited to the middle position in the left-right direction, and may be provided at both ends in the left-right direction close to the left and right plates 6 and 7.
[0026]
Further, the left and right side plates 6 ′ and 7 ′ are provided on both side edges of the bottom plate 1, and the left and right side plates 6 and 7 are provided on both end edges of the main cover plate 4, but the side plates are provided on either the bottom plate 1 or the main cover plate 4. It may be configured.
[0027]
As another embodiment, as shown in FIGS. 7 and 8, the fixing piece 11 is not provided on the sub cover plate 5 but on the main cover plate 4, and the locking piece 12 is provided not on the open piece 8 but on the sub cover plate 5. May be employed.
[0028]
As shown in FIG. 7, the locking piece 12 is provided on the sub-cover plate 5 by a cut line d, is formed so as to extend rearward from the lateral fold line r of the sub-cover plate 5, and is fixed. The piece 11 is provided on the main cover plate 4 by the perforation a, and when the opening piece 8 is cut off, the fixing piece 11 corresponds to the locking piece 12 in the lateral direction of the sub-cover plate 5. Is formed so as to extend forward than the fold line r of the.
[0029]
As shown in FIG. 8A, when the sub-cover plate 5 is rotated in the direction of the arrow, the sub-cover plate 5 stands while pressing down the fixing piece 11 of the main cover plate 4. As shown in FIG. 8 (b), when the sub lid 5 is completely opened, the fixing piece 11 returns to a horizontal state, and its leading edge contacts the upper surface of the locking piece 12 of the sub lid 5. , The standing state of the sub lid plate 5 is maintained. Next, when the sub lid plate 5 is closed, as shown in FIG. 8C, the sub lid plate 5 rotates in the direction of the arrow, and the locking piece 12 is inserted below the fixing piece 11. State. For this reason, the box 10 once opened and the unopened box 10 have a different vertical positional relationship between the fixing piece 11 and the locking piece 12, so that it is easy to distinguish at a glance whether or not the box 10 has been opened.
[0030]
Further, as shown in FIG. 8 (c), since the fixing piece 11 is pushed upward by the locking piece 12, distortion of the fixing piece 11 and the main lid plate 4 hardly occurs, and in the subsequent opening / closing operation again. As shown in FIG. 8A, the sub lid 5 can be opened lightly and smoothly without pushing down the fixing piece 11.
[0031]
【The invention's effect】
According to the present invention, as described above, the opening and closing of the cover plate becomes lighter, and the function of maintaining the cover plate in the open state even when the opening and closing operations are repeated is maintained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an assembled state of an embodiment; FIG. 2 is a perspective view showing an opened state of the embodiment; FIG. 3 is an enlarged sectional view of a main part of FIG. 2; FIG. 5 is a perspective view showing an opened state of another embodiment; FIG. 6 is a development view of FIG. 5; FIG. 7 is an enlarged view of a main part of another embodiment; FIG. 8 is an enlarged sectional view of a main part of FIG. FIG. 9 is a perspective view of a conventional example. FIG. 10 is a development view of FIG.
1, 21 bottom plate 2, 22 front side plate 3, 23 rear side plate 4, 24 main cover plate 5, 25 sub cover plate 6, 6 ', 26, 26' left plate 7, 7 ', 27, 27' right plate 8, 28 Opening piece 9, 29 Tongue piece 10, 20 Paper box 11 Fixing piece 12, 32 Locking piece 13, 33 Insertion piece 24 Cover plate 30 Front wall

Claims (2)

The front and rear side plates 2 and 3 are connected to each other by breaking the fold line r at the front and rear ends of the bottom plate 1, and the main lid plate 4 or the sub lid plate is connected to the upper edges of both side plates 2 and 3 via the fold line r The left and right side plates 6, 7, 6 ', 7' are continuously connected to both side edges of the bottom plate 1 or both side edges of the main cover plate 4 via a fold line r. A fold line r is formed over the entire length in the lateral direction near the rear edge of the main cover plate 4 so as to be able to undulate through the fold line r, and the main cover plate 4 is formed with an open piece 8 entirely surrounded by perforations a. Made of one blank,
With respect to the bottom plate 1, each side plate is raised through a fold line r, the main cover plate 4 is bent inward through the fold line r with respect to the front side plate 2, and the sub-cover plate with respect to the rear side plate 5. 5 is bent inward through a fold line r, is superimposed on the upper surface of the main cover plate 4 and is bonded to the open piece 8,
When the sub-cover plate 5 is erected through the fold line r extending over the entire length in the lateral direction, the opening piece 8 bonded to the sub-cover plate 5 is cut off from the main cover plate 4 through the perforation a to be opened. Paper box,
A part of the perforation a around the opening piece 8 is formed along the same line as the horizontal fold line r of the sub lid 5,
A fixing piece 11 is formed by a notch b in front of the lateral fold line r of the sub lid plate 5, and a locking piece 12 extending rearward corresponding to the fixing piece 11 is formed on a rear edge of the opening piece 8. Is formed,
When the sub-cover plate 5 is erected, the leading edge of the fixing piece 11 of the sub-cover plate 5 abuts on the upper surface of the locking piece 12 of the opening piece 8 to maintain the sub-cover plate 5 in the upright state. A paper box characterized by the following. 2. The paper box according to claim 1, wherein the locking piece 12 is provided by a cut d in the sub-cover plate 5 instead of the open piece 8, and the rear of the sub-cover plate 5 from the lateral fold line r. The fixing piece 11 is provided on the main cover plate 4 by the perforation a instead of the sub-cover plate 5, and the fixing piece 11 of the sub-cover plate 5 corresponds to the locking piece 12. A paper box formed so as to extend forward from the horizontal fold line r.

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