Improper opening prevention packaging box

Abstract

To provide a tamper-proof packaging box which prevents tampering caused by deformation of the opening side of a box body and improves the appearance of a top plate when the lid is attached. [Solution] A lid is formed on the upper opening edge 11 of the box body 10 so that it can swing freely. An inner top plate 21 and an outer top plate 22 are formed facing each other at the upper opening edge 11. When the removal piece 13 is removed during opening, a release opening opens on the side of the box body 10. The insertion fixing piece 22A is configured to be released from the insertion cut line 21A. A reinforcing piece 22B is formed on the tip side of the outer top plate 22, surrounding the periphery of the insertion fixing piece 22A. The bent reinforcing piece 22B is overlapped on the inside of the outer top plate 22 to cover it.

Description

[Technical field]

[0001] The present invention relates to a tamper-evident packaging box that can prevent unauthorized opening during the distribution process of paper boxes. [Background technology]

[0002] Conventionally, there is a packaging box of this type proposed by the applicant previously (Patent Document 1). This packaging box is configured to prevent unauthorized opening without using adhesive means such as a sealing paper and to be opened safely. That is, a removal piece 13 that opens a release opening 12 is formed on the side of the box body 10. Furthermore, both ends of an insertion fixing piece 22A formed on the lid body 20 are engaged with the insertion cut line 21A of the inner top plate 21 so as not to be easily removed. Then, when the removal piece 13 is removed at the time of opening, the release opening 12 opens on the side of the box body 10, and the insertion fixing piece 22A can be easily released. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6775261 Summary of the Invention [Problem to be solved by the invention]

[0004] The packaging box of Patent Document 1 has both ends of the insertion fixing piece 22A engaged within the insertion cut line 21A, and when the removal piece 13 is removed during opening, the release opening 12 opens on the side of the box body 10, preventing unauthorized opening and allowing safe opening without using adhesive means such as a seal paper. However, because both ends of the insertion fixing piece 22A of the outer top plate 22 are engaged within the insertion cut line 21A of the inner top plate 21 facing the outer top plate 22, if the opening portion of the packaging box is distorted, the position of the insertion fixing piece 22A may shift, causing a gap at the opening or coming off the insertion cut line 21A.

[0005] Furthermore, there is a risk that the opening of the packaging box may be intentionally distorted to form a gap, and the gap may be used to forcibly remove the insertion fixing piece 22A. In particular, the thinner the paperboard used to form the box, the greater the distortion that occurs at the opening. Therefore, the paperboard used to form this type of packaging box needs to be of a certain thickness, and it is difficult to select a thin paperboard. Thus, in conventional tamper-proof packaging boxes, the distortion that occurs at the opening of the packaging box has been an issue in preventing tampering.

[0006] Furthermore, when both ends of the insertion fixing pieces 22A of the outer top plate 22 are overlapped on the inner top plate 21 facing the outer top plate 22 and engaged within the insertion cut lines 21A, the engaged center part of the outer top plate 22 is in close contact with the inner top plate 21, but the two sides of the outer top plate 22 gradually move away from the top of the inner top plate 21, which causes the appearance of the outer top plate 22 in the closed state to be poor (see FIG. 10). In particular, in a high-end box for storing cosmetics and the like, it is unacceptable to spoil the appearance of the top plate.

[0007] Therefore, the present invention has been devised to solve the above-mentioned problems, and aims to provide a tamper-evident packaging box in which tamper-evident packaging containers can prevent tampering due to deformation of the opening without being affected by the thickness of the paperboard forming the box body, and which can improve the appearance of the top plate when the lid is closed. [Means for solving the problem]

[0008] In order to achieve the above object, the first means of the present invention is to A lid body 20 is formed on the upper opening edge 11 of the box body 10 so as to be freely swingable. The lid body 20 is formed so that an inner top plate 21 and an outer top plate 22 facing each other are folded over at the upper opening edge 11. An insertion cut line 21A is formed at the swing side end of the boundary portion between the inner top plate 21 and the box body 10, and a removal piece 13 is formed along the insertion cut line 21A on the side surface of the adjacent box body 10, which opens the release port 12 from the insertion cut line 21A. A tongue-shaped plug-in fixing piece 22A is formed at the opening end of the outer top plate 22, and when the lid is attached, the plug-in fixing piece 22A is inserted into the plug-in cut line 21A so that both ends of the plug-in fixing piece 22A engage with the inside of the inner top plate 21; In a packaging box with a tamper-proof function, a release opening 12 is opened on a side surface of a box body 10 when a removal piece 13 is removed at the time of opening, and at the same time, an insertion fixing piece 22A is released from an insertion cut line 21A. A reinforcing piece 22B is formed on the tip end side of the outer top plate 22, and the bent reinforcing piece 22B is overlapped on the inside of the outer top plate 22 to cover it.

[0009] The reinforcing piece 22B of the second means includes bent portions 22Ba formed by bending on both sides of the insertion fixing piece 22A, and an overlapping portion 22Bb extending from the bent portions 22Ba and surrounding the periphery of the insertion fixing piece 22A.

[0010] The bent portion 22Ba of the reinforcing piece 22B of the third means is formed so as to be inclined and spread out from the insertion fixing piece 22A toward both sides of the tip portion of the outer top plate 22.

[0011] The fourth means is to form an insertion piece 21B at the tip of the inner top plate 21 which is inserted into and overlaps with the inside of the box body 10, and is configured so that the reinforcing piece 22B and the outer top plate 22 overlap on top of the inner top plate 21 which covers the opening of the box body 10. Effect of the Invention

[0012] This device increases the strength of the insert fixing piece 22A side of the outer top plate 22 by overlapping the bent reinforcing piece 22B with the inside of the outer top plate 22 when the lid is closed, and makes it possible to prevent tampering due to deformation without being affected by the thickness of the paperboard.

[0013] Furthermore, the opening end of the outer top plate 22, where the reinforcing piece 22B is superimposed, is strengthened, eliminating the problem that both sides of the outer top plate 22 gradually separate from the top of the inner top plate 21. As a result, the appearance of the top plate is improved when the lid is installed.

[0014] In this way, the present invention has achieved its original objective of preventing tampering due to deformation of the opening without being affected by the thickness of the paperboard forming the box body, and of improving the appearance of the top plate when the lid is closed. [Brief description of the drawings]

[0015] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a perspective view of the essential parts of the device with the inner top plate in place. [Figure 4] A side view of the main parts showing the inner and outer top plates of this device when the lid is installed. [Diagram 5] FIG. [Figure 6] FIG. 4 is a perspective view of the essential part of the present invention with the removal piece removed. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. 13 is a front view of a main part of a conventional packaging box in a closed state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The basic configuration of the present invention is a rectangular box 10 formed by folding a sheet body P, and a tamper-proof lid 20 that covers the box 10 (see FIG. 1). The box 10 of the present invention only needs to have an opening that is covered by the lid 20 in a substantially rectangular shape, and the size and shape of the body and the configuration of the bottom can be changed as desired.

[0017] The lid 20 has a tamper-proof function that prevents unauthorized opening when the box 10 is closed. That is, the basic structure of the lid 20 is such that an inner top plate 21 and an outer top plate 22 that face each other at the upper opening edge 11 of the box 10 are folded over each other so as to be able to swing freely (see FIG. 2).

[0018] In the illustrated example, a pair of opposing folding pieces 23, 24 are further provided on the upper opening edge 11. These folding pieces 23, 24 are folded into the opening, and then the inner top plate 21 is folded over (see FIG. 3), and then the outer top plate 22 is folded over the inner top plate 21 (see FIG. 4). At this time, it is also possible to first fold the inner top plate 21, fold the folding pieces 23, 24 over it, and then fold the outer top plate 22 over it last (not shown).

[0019] An insertion cut line 21A is formed on the swing side end of the inner top plate 21 (see FIG. 1). Furthermore, a removal piece 13 that opens the release port 12 is formed on the side surface of the box body 10 adjacent to this insertion cut line 21A (see FIG. 5).

[0020] The illustrated inner top plate 21 has an insertion piece 21B formed at the tip thereof, which is inserted and overlaps with the inside of the box body 10 (see FIG. 3). Then, the reinforcing piece 22B and the outer top plate 22 overlap on the inner top plate 21 that covers the opening of the box body 10 (see FIG. 4).

[0021] An insertion fixing piece 22A is bent at the opening end of the outer top plate 22 (see FIG. 3). The illustrated insertion fixing piece 22A is fan-shaped with a narrow center and protruding ends. On the other hand, both sides of the insertion cut line 21A are formed along the upper opening edge 11 on the swing side of the inner top plate 21, and the center side of the insertion cut line 21A is formed so as to slightly intrude into the inner top plate 21 (see FIG. 1).

[0022] The plug-in fixing pieces 22A are inserted into the box 10 through the plug-in cutouts 21A, and both ends of the plug-in fixing pieces 22A are engaged with the lower surface of the inner top plate 21 (see FIG. 6). The relationship between the plug-in fixing pieces 22A and the plug-in cutouts 21A is tamper-proof (see FIG. 5).

[0023] Furthermore, a reinforcing piece 22B is formed on the tip end side of the outer top plate 22 (see FIG. 8). This reinforcing piece 22B is a portion that is bent and overlapped inwardly with the outer top plate 22 when the lid is attached (see FIG. 3).

[0024] The illustrated reinforcing piece 22B has bent portions 22Ba formed by bending on both sides of the plug-in fixing piece 22A, and overlapping portions 22Bb extending from the bent portions 22Ba and surrounding the plug-in fixing piece 22A (see FIG. 8). Then, the plug-in fixing piece 22A is inserted into the insertion cut line 21A in a state where the bent portions 22Ba are bent so that the overlapping portions 22Bb overlap the inside of the outer top plate 22 (see FIG. 4). In this state, when both ends of the plug-in fixing piece 22A are engaged with the lower surface of the inner top plate 21, the tip side of the outer top plate 22 is reinforced by the reinforcing piece 22B (see FIG. 5).

[0025] That is, when the reinforcing piece 22B is folded over the outer top plate 22, the bent portion 22Ba of the reinforcing piece 22B increases the strength of the tip side of the outer top plate 22 (see FIG. 4). Furthermore, the overlapping portion 22Bb folded over the inside of the outer top plate 22 attempts to lift the opening side of the outer top plate 22 by the elastic restoring force when bent (see FIG. 7). As a result, when bent, the reinforcing piece 22B also increases the engaging force of the insertion fixing piece 22A (see FIG. 5).

[0026] Moreover, the overlapping portion 22Bb of the reinforcing piece 22B may be formed so as to surround the periphery of the insertion fixing piece 22A as shown in the figure, or may have any shape extending from the left and right bent portions 22Ba of the insertion fixing piece 22A. In this way, the reinforcing piece 22B may be configured to overlap the inside of the outer top plate 22 to reinforce the tip side of the outer top plate 22, and the shape of the overlapping portion 22Bb can be changed.

[0027] In this manner, when the tip side of the outer top plate 22 is reinforced and in the closed state, it becomes extremely difficult to intentionally distort the opening to form a gap and then use this gap to forcibly remove the insertion fixing piece 22A.

[0028] Furthermore, the bent portion 22Ba of the reinforcing piece 22B is formed so as to be inclined and spread out from the insertion fixing piece 22A toward both sides of the tip of the outer top plate 22 (see FIG. 8). In other words, the inclination to be spread out is a state in which the outer top plate 22 is inclined so as to gradually become wider from the center side of the tip of the outer top plate 22 toward the outside. When such a bent portion 22Ba is formed, when the reinforcing piece 22B is bent, the left and right sides of the tip side of the outer top plate 22 are bent so as to slightly protrude from the center side (see FIG. 5).

[0029] Compared to a straight bent state, this bent shape of the outer top plate 22 generates stress at both ends of the bent portion, and even if the thickness of the paperboard is thin, the left and right ends of the tip of the outer top plate 22 are in a state of tension. As a result, both sides of the outer top plate 22 always remain in contact with the top of the inner top plate 21, and the sides of the outer top plate 22 do not gradually move away from the top of the inner top plate 21 over time as in the past (see Figure 5).

[0030] 9 has a shape with a wide opening. In this case, the reinforcing piece 22B surrounds the periphery of the insertion fixing piece 22A and forms a wide reinforcing piece 22B that matches the opening. In this way, the shape and size of the reinforcing piece 22B can be changed as desired to match the shape of the box 10 and the lid 20.

[0031] The release opening 12 is opened by removing the removal piece 13 when opening the box 10 (see FIG. 6). That is, when the removal piece 13 is removed, the central portion of the insertion fixing piece 22A is exposed from the release opening 12, and the insertion fixing piece 22A is lifted to open the box 10.

[0032] In addition, both end portions of the insertion fixing piece 22A are locked to the underside of the inner top plate 21 (see FIG. 6). Therefore, even after the release port 12 is opened, the insertion fixing piece 22A can be locked again to the underside of the inner top plate 21 and reused.

[0033] The configuration of the present invention is not limited to the illustrated example, and design changes can be freely made within the scope of the present invention without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0034] P sheet body 10 box body 11 Upper opening edge 12 Release port 13 Removal piece 20 Lid 21 Inner top plate 21A Insertion cutout line 21B Insert 22 Outer top plate 22A Insertion Fixing Piece 22B Reinforcement piece 22Ba bent part 22Bb Polymerization part 23 Bent piece 24 Folded piece

Claims

1. A lid body is formed on the upper opening edge of the box body so as to be freely swingable, and the lid body is formed so that an inner top plate and an outer top plate facing each other are folded over at the upper opening edge, A cut line for insertion is formed at the swing side end of the boundary portion between the inner top plate and the box body, and a removal piece is formed along the cut line for insertion on the side surface of the adjacent box body, the removal piece opening a release port from the cut line for insertion; A tongue-shaped plug-in fastening piece is formed at the opening end of the outer top plate, and when the lid is attached, the plug-in fastening piece is inserted into the plug-in cut line so that both ends of the plug-in fastening piece engage with the inside of the inner top plate; In a packaging box with a tamper-proof function, a release opening is opened on a side surface of the box body when a removal piece is removed at the time of opening, and at the same time, an insertion fixing piece is released from an insertion cut line, A tamper-evident box, characterized in that a reinforcing piece is formed on the tip side of the outer top plate, and the bent reinforcing piece is overlapped on the inside of the outer top plate to serve as a lid.

2. 2. The tamper-evident box according to claim 1, wherein the reinforcing piece has bent portions formed on both sides of the insertion fixing piece, and overlapping portions extending from the bent portions and surrounding the periphery of the insertion fixing piece.

3. 3. The tamper-evident box according to claim 2, wherein the bent portion of the reinforcing piece is formed so as to be inclined and spread out from the insertion fixing piece toward both sides of the tip of the outer top plate.

4. 2. A tamper-evident box as described in claim 1, wherein an insertion piece is formed at the tip of the inner top plate to be inserted and overlapped inside the box body, and the reinforcing piece and the outer top plate are overlapped on top of the inner top plate which covers the opening of the box body.

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