JP4155498B2 - Packaging case - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging case formed from a plastic sheet, and more particularly to a structure for preventing opening of a packaging case.
[0002]
[Prior art]
Conventionally, as this type of packaging case, a case that is formed by bending a plastic sheet into a box shape and includes a cylindrical side wall portion and a cover plate for closing the opening thereof is known.
And in this packaging case, an article to be packaged is accommodated from the opening, and the opening is closed by the cover plate. In general, the cover is prevented from being opened by adhering the cover plate to the side wall portion. It was.
[0003]
[Problems to be solved by the invention]
However, from the viewpoint of facilitating the manufacturing process and the like, it is desired to prevent the lid plate from being opened only by assembling without using an adhesive. On the other hand, although the structure which prevents opening of a cover plate by inserting the insertion piece projected upwards from the edge of the side wall part in the notch | locking notch for a cover plate is also considered, in this case, an insertion piece Is simply inserted into the notch, it is possible to easily remove the insertion piece from the notch and open the cover plate.
[0004]
Then, this invention is made | formed in view of the said conventional problem, and makes it a subject to provide the packaging case which can prevent the opening of a cover board reliably, without using an adhesive agent.
[0005]
[Means for Solving the Problems]
The present invention has been made to solve the above problems, and a packaging case according to the present invention is formed by bending a plastic sheet into a box shape, and an insertion piece protruding from a side wall portion is used for locking a lid plate. A packaging case configured to prevent opening of a cover plate by being inserted into a notch, comprising a locking means for locking the insertion piece so as to maintain the insertion state of the insertion piece, and the insertion piece An opening cutting line is formed on the cover plate starting from the lock notch so that the entire exposed opening can be formed on the cover plate. When opening, the insertion piece is pulled upward from the opening. The locking means is configured to be released from the locked state .
[0006]
In this configuration, when the insertion piece is inserted into the locking notch, the locking means locks the insertion piece, so that the insertion state of the insertion piece is maintained.
[0008]
In addition, an opening cutting line starting from the locking notch is formed on the cover plate so that the opening that exposes the entire insert piece can be formed on the cover plate. Since the locking state of the locking means is released by pulling it out, the locking state is released by pulling the insertion piece upward from the opening, so the lid plate can be opened easily. can do.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the packaging case of the present invention will be described with reference to FIGS. 1 to 8.
The packaging case shown in FIG. 1 is assembled into a vertically long box shape by bending a single unfolded plastic sheet as shown in FIG. It is formed. Note that a predetermined folding ruled line is engraved on all the folding lines 1, 2, and 3. In FIG. 3, folding lines 1, 2, and 3 are indicated by broken lines.
[0010]
Here, the plastic sheet is formed from a synthetic resin such as polyester such as polyethylene terephthalate, polyvinyl chloride, polypropylene, and polystyrene, and is preferably hard or semi-rigid. Polypropylene is particularly preferable, and a transparent or translucent one is used. Is done. Further, a thickness of 0.1 mm to 0.8 mm can be adopted, and a thickness of 0.2 mm to 0.5 mm is particularly preferable from the viewpoints of manufacturing, cost, required strength of the case, and the like.
[0011]
Returning to FIG. 1, the packaging case includes a rectangular cylindrical side wall portion 9 including a front wall 5, a back wall 6, and left and right side walls 7, 8, and a total of four bottom flaps 10, so as to close the lower opening of the case. The bottom part 14 comprised from 11, 12, and 13 and the cover plate 15 for obstruct | occluding the upper opening of a case are provided. In addition, side flaps 17 and 16 are extended through folding lines 3 at the upper edge portions of the left and right side walls 7 and 8, respectively. Further, the cover plate 15 is extended to the upper edge portion of the back wall 6 via a folding line 3, and a lid flap 18 is extended to the front end of the lid plate 15 via the folding line 2, as shown in FIG. In addition, the lid flap 18 is folded inside the front wall 5 in a state where the lid plate 15 is closed.
[0012]
Further, an insertion piece 19 having a predetermined width projects upward from the approximate center of the upper edge 5 a of the front wall 5, and a locking cut 20 is formed on the folding line 2 of the lid flap 18. In the state where the upper opening is closed by the cover plate 15 as shown in FIG. 2, in order to maintain the closed state of the cover plate 15, the insertion piece 19 is inserted into the locking notch 20. Hereinafter, an opening prevention structure for preventing the opening of the lid plate 15 will be described.
[0013]
As shown in FIG. 4, the insertion piece 19 protrudes upward from the upper edge portion 5 a of the front wall 5 with a predetermined width L <b> 1. It is configured to be inserted into the locking notch 20 while being bent approximately 90 degrees inward. Therefore, the folding line 1 for bending the insertion piece 19 is formed. The folding line 1 is formed at a position lower than the upper edge portion 5a of the front wall 5 as shown in FIG. 4 to 6, 9, and 10, the folding lines 1 and 2 are indicated by two-dot chain lines.
[0014]
Further, the folding line 1 of the insertion piece 19 is not formed over the entire width so as to cross the insertion piece 19, but has a predetermined length (L 2) substantially at the center in the width direction of the insertion piece 19. Only formed. The upper edge 5a of the front wall 5 and each end of the folding line 1 are cut and separated, and therefore the insertion piece 19 is connected to the front wall 5 only by the folding line 1. As described above, the folding line 1 is formed at a position that is one step lower than the upper edge portion 5a of the front wall 5. Therefore, the insertion piece 19 is connected to the upper edge portion 5a of the front wall 5 from each end portion of the folding line 1. And cut and separated from the front wall 5 so as to bite into the distal end side of the insertion piece 19. Therefore, the insertion piece 19 is inserted into the both sides of the folding line 1 with an inclined edge 19a inclined from the end of the folding line 1 toward the distal end side of the insertion piece 19, and the inclined edge 19a. It has the locked edge part 19c substantially parallel to the folding line 1 so that the side edge part 19b of the piece 19 may be connected (refer FIG. 5 (B)).
[0015]
Since the insertion piece 19 is configured as described above, in a state where the insertion piece 19 is bent approximately 90 degrees inward with respect to the front wall 5, the insertion piece 19 is front wall as shown in FIG. 5 is located one step lower than the upper edge 5a. At the same time, a predetermined gap G is formed between the locked edge 19c and the front wall 5 on both sides of the folding line 1 as seen in FIG. The gap G may be at least as thick as the plastic sheet constituting the packaging case.
[0016]
Furthermore, a substantially U-shaped cutting line 21 (opening means) is engraved on the upper portion of the front wall 5 at a position below the insertion piece 19. In the front wall 5, a separation region 22 that is separated from other regions by a substantially U-shaped cutting line 21 is connected to the insertion piece 19 via the folding line 1. The separation region 22 has substantially the same width as the insertion piece 19. That is. The cutting line 21 connects the vertical line portion 21a continuously formed in the vertical direction to the predetermined height from both side edge portions 19b of the insertion piece 19 and the end portions of the vertical line portions 21a. The horizontal line portion 21b is formed substantially horizontally in the horizontal direction. Specifically, most of each vertical line portion 21a is in a cut state, and an uncut portion 21c is provided only at one position on the lower side. The horizontal line portion 21b is substantially the same, and is in a cut state except that the uncut portions 21c are provided only in two places. Therefore, in this embodiment, the separation area 22 is separated from other areas by cutting a total of four uncut parts 21c. Further, since the vertical line portion 21a is in a state in which a predetermined part on the upper side is cut, when the insertion piece 19 is inserted into the locking cut 20, the uncut portion 21c of the vertical line portion 21a is used as a fulcrum. 22 can be bent forward, and therefore the insertion piece 19 can be easily inserted into the notch 20. However, the cutting line 21 can use various cutting lines such as a perforation in which cut portions and uncut portions are alternately formed, or a so-called half-cut perforation.
[0017]
Next, the locking notch 20 into which the insertion piece 19 is inserted will be described.
As shown in FIG. 6A, the cut 20 is formed on the folding line 2 of the lid flap 18 over a length L3. The length L3 of the cut 20 is set to be approximately equal to the width L1 of the insertion piece 19 or slightly longer (for example, about 1 mm). Further, a biting portion 20 a that bites into the front end side of the lid flap 18 through a step is formed at a position corresponding to the folding line 1 of the insertion piece 19 at a substantially center of the notch 20. Accordingly, as shown in FIG. 6B, when the lid flap 18 is bent approximately 90 degrees downward with respect to the lid plate 15, the size corresponding to the biting amount of the biting portion 20a is formed on the lid flap 18 side of the cut 20. The notch opening 23 is formed. The length L4 of the biting portion 20a is set to be approximately equal to or slightly longer (for example, about 1 to 2 mm) than the length L2 of the folding line 1 of the insertion piece 19. Further, the amount of biting of the biting part 20a, that is, the step D2 between the folding line 2 of the lid flap 18 and the biting part 20a is between the folding line 1 of the insertion piece 19 and the upper edge part 5a of the front wall 5. Is set to be substantially equal to or larger than the step D1.
[0018]
The packaging case configured as described above is assembled in a box shape as shown in FIG. 1, and after various objects to be packaged are stored, the upper opening is closed by the cover plate 15. There are various types of items to be packaged. Among them, foods, pharmaceuticals, cosmetics and the like particularly require unopenability, that is, the so-called tamper function of the cover plate 15. In the present embodiment, when the lid flap 18 is folded inside the side wall portion 9 and the insertion piece 19 in the bent state is inserted into the locking notch 20, the folding curve 1 of the insertion piece 19 becomes the upper edge of the front wall 5. Since a predetermined gap G is formed between the locked edge 19c of the insertion piece 19 and the front wall 5 at a position lower than the portion 5a, the insertion piece as shown in FIG. The base end 19d of 19 automatically fits into the notch opening 23 of the locking notch 20, and a lid flap is provided in the gap G on both sides of the base end 19d of the insertion piece 19 as shown in FIG. Both side portions 18a of the notch opening 23 in 18 enter. Accordingly, when the insertion piece 19 is pulled out of the notch 20 and the cover plate 15 is to be opened, both the locked edges 19c (locked portions) of the insertion piece 19 are on both sides of the notch opening 23 in the lid flap 18. Since it is locked to the portion 18a (locking portion), the insertion piece 19 cannot be easily extracted from the cut 20. That is, even if the lid flap 18 is not bonded to the front wall 5, the lid plate 15 is reliably prevented from being opened. Thus, in this embodiment, the latch which latches the insertion piece 19 in order to maintain the insertion state of the insertion piece 19 from the to-be-latched edge part 19c and the lid | cover flap 18 of the insertion piece 19. Means are configured.
[0019]
And when opening a packaging case, the separation area | region 22 of the front wall 5 is isolate | separated from another area | region by the cutting line 21, and the cover plate 15 is opened upwards like FIG. At the time of opening, the locking state of the insertion piece 19 remains maintained, and therefore the insertion piece 19 and the separation region 22 move upward together with the cover plate 15.
[0020]
As described above, in the packaging case according to the present embodiment, by providing the locking means, it is possible to reliably prevent the lid plate 15 from being opened only by assembling without using an adhesive. The cutting line 21 that can be easily cut is cut when trying to do so, and it can be determined that it has been opened by mischief or the like (tamper-evidence), so it is particularly effective when packaging foods, pharmaceuticals, and cosmetics as packages. Is big. Moreover, as the opening means, a cutting line 21 for separating the insertion piece 19 from the front wall 5 by separating the separation region 22 of the front wall 5 from other regions is provided. It can be opened easily only by the work of separating the cutting line 21. Further, since the insertion piece 19 is formed on the side wall portion 9 and the locking cut 20 is formed on the folding line 2 of the lid flap 18, the lid flap 18 folded inside the side wall portion 9 is inserted into the insertion piece 19. In addition, the cover plate 15 is double-fixed so that the insertion piece 19 is locked by the locking means to maintain the insertion state. 15 can be more reliably prevented from opening compared to the configuration provided in 15, and the peripheral edge of the cover plate 15 can also be prevented from warping upward.
[0021]
In order to more easily separate the separation region 22 of the front wall 5, for example, a substantially semicircular notch 24 may be adjacent to the lower side of the separation region 22 as shown in FIG. . In FIG. 9, a portion that is cross-hatched is a notch 24, and the separation region 22 can be easily separated by inserting a finger into the notch 24. Further, instead of the notch 24, a folding line 25 is formed at a predetermined distance from the horizontal line part 21b downward as shown in FIG. 10, and both vertical line parts 21a are extended to the folding line 25, thereby folding the curve line. It is good also as a structure which bends the area | region 26 between 25 and the horizontal line part 21b back and forth by using the folding line 25 as a fulcrum. In such a configuration in which the notch 24 is not used, it is not necessary to process the sheet residue generated when the notch 24 is formed, and it is possible to prevent dust and the like from entering the packaging case through the notch 24. preferable.
[0022]
In the above embodiment, the case where the cutting line 21 for separating the insertion piece 19 from the front wall 5 is formed on the front wall 5 as the opening means has been described. By forming this cutting line, the locking state of the locking means can be released at the time of opening.
[0023]
For example, the packaging case shown in FIG. 11 is formed by bending the unfolded plastic sheet shown in FIG. 13 into a box shape, and the structure of the locking means is the same as described above, but the opening means is different. Yes. In FIG. 13, folding lines 1, 2, and 3 are indicated by broken lines.
In the packaging case, the cutting wall 21 as described above is not formed on the front wall 5. Instead, slits 31 having a predetermined length are formed on the left and right sides of the insertion piece 19 from the upper edge portion 5a of the front wall 5 downward, so that the insertion piece 19 is easily bent forward. is doing. The folding line 1 etc. of the insertion piece 19 are the same.
[0024]
Then, as shown in FIG. 14, when the lid plate 15 is closed, the insertion piece 19 is locked by the locking means as in the above embodiment, but the cutting line 30 for opening the lid plate 15. Is formed as an opening means. As shown in FIG. 14 (a), the cutting line 30 includes a vertical line portion 30a extending from the both ends of the locking cut 20 to the base end side of the cover plate 15, and terminal portions of both vertical line portions 30a. The horizontal line portion 30b extending in the horizontal direction so as to connect each other is formed in a substantially U-shape as a whole. Each vertical line portion 30a and horizontal line portion 30b have two uncut portions 30c, and the other portions are cut. Then, at the time of opening, by forming a biting portion 20a in the locking notch 20, the region 32 protruding forward in the folded state of the lid flap 18 is manually picked as a knob and pulled upward, thereby locking the notch 20 The cutting line 30 is cut from the starting point, and an area 33 defined by the locking notch 20 and the substantially U-shaped cutting line 30 is separated from the other areas of the cover plate 15. An opening 34 is formed at an upper position of the insertion piece 19 so that the entire insertion piece 19 is exposed (see FIG. 14B). By pulling the insertion piece 19 in a bent state from this state upward from the opening 34 and returning it to a substantially upright state, the locked state between the lid flap 18 and the insertion piece 19 is released, and thus the lid plate 15 is removed. It can be opened upward and opened.
[0025]
It should be noted that the opening 33 is formed so that, for example, only the vertical line portions 30a are cut and the horizontal line portions 30b are left without being cut, instead of separating the area 33 from other areas at the time of opening. May be. Therefore, the cutting line 30 itself may be only both vertical line portions 30a. In any case, the cutting line 30 may be formed starting from the locking cut 20 so that the opening 34 can be formed in the cover plate 15 so that the insertion piece 19 can be taken out of the cover plate 15.
[0026]
In this way, the opening means can operate in various configurations, and any configuration may be used as long as the lid plate 15 is opened by partially cutting the sheet.
The design of the locking means can be changed as appropriate, and in any case, any configuration may be used as long as the insertion state of the insertion piece 19 is maintained by locking the insertion piece 19.
[0027]
【The invention's effect】
As described above, since the locking means for locking the insertion piece to maintain the insertion state of the insertion piece is provided, the lid plate can be reliably prevented from opening without using an adhesive. In addition, a cutting line for opening starting from the locking notch is formed on the cover plate, and an opening that exposes the entire insertion piece can be formed on the cover plate by the cutting line. The lid plate can be easily opened by pulling the insert piece upward, and both the opening prevention function and the ease of opening can be achieved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a packaging case according to an embodiment of the present invention.
FIG. 2 is a partial perspective view showing a state where a cover plate of the packaging case is closed.
FIG. 3 is a development view of a plastic sheet constituting the packaging case.
FIG. 4 is an enlarged view of a main part of the case.
5 is an enlarged view of a main part of the case, (A) is a front view showing a state where the insertion piece is bent from the state of FIG. 4, and (B) is a plan view of the state. FIG.
FIG. 6 is an enlarged view of the main part of the case, (A) is a plan view showing a state in which the lid flap is not bent, and (B) is a state in which the lid flap is bent from the state (A). FIG.
7 is an enlarged view of a main part of FIG. 2, in which (a) is a front view in a state in which a front wall is omitted, and (b) is a cross-sectional view taken along a line PP in (a).
FIG. 8 is a perspective view showing an opened state of the case.
FIG. 9 is an enlarged view of a main part of a packaging case according to another embodiment of the present invention.
FIG. 10 is an enlarged view of a main part of a packaging case according to another embodiment of the present invention.
FIG. 11 is a perspective view corresponding to FIG. 1 and showing a packaging case according to another embodiment of the present invention.
12 is a partial perspective view corresponding to FIG. 2 showing a state in which the cover plate of the packaging case is closed.
FIG. 13 is a development view of a plastic sheet constituting the case.
FIG. 14 is an enlarged plan view of a main part of the case, in which (A) shows a state before opening, and (B) shows an opened state.
[Explanation of symbols]
1, 2, 3 ... Folding curve, 5 ... Front wall, 5a ... Upper edge, 9 ... Side wall, 15 ... Cover plate, 18 ... Cover flap (locking means), 19 ... Insert, 19c ... Engagement Stop edge portion (locking means), 20 ... cutting for locking, 21, 30 ... cutting line (opening means), 34 ... opening

Claims (1)

A packaging case configured to be bent from a plastic sheet into a box shape and configured to prevent opening of the lid plate by inserting an insertion piece protruding from the side wall portion into a locking notch of the lid plate, For opening from the notch for locking so that the cover plate can be formed with an opening that exposes the entire insertion piece, with locking means for locking the insertion piece to maintain the insertion state of the insertion piece The packaging case is configured such that the cutting line is formed on the lid plate, and the locking means is unlocked by pulling the insertion piece upward from the opening at the time of opening .

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