JP6866196B2 - Packaging box - Google Patents

Description

The present invention relates to a packaging box.

There is known a packaging box that is sealed by superimposing and adhering an outer flap on an inner flap.

For example, the packaging box described in Patent Document 1 is a type A box having a pair of outer flaps bonded to a pair of inner flaps. Each outer flap is formed with a V-shaped diagonal rule that extends toward its edge. Inside the V-shaped diagonal fold ruled line, a flexible portion that bends in the vertical direction is formed. When opening this packaging box, the operator pushes in the flexible part of one outer flap to form a gap with the edge of the other outer flap, and puts his hand in the gap to insert the outer flap inside. Peel (separate) from the flap.

Japanese Unexamined Patent Publication No. 2003-335323

In the above-mentioned packaging box, it was easy for the operator to grasp the outer flap by leaving a gap in the abutting portion of the pair of outer flaps, but the plurality of adhesive parts for adhering the pair of inner flaps and the outer flaps are formed at almost the same time. I had to peel it off. Therefore, a large force was required to peel off the outer flap from the inner flap. Therefore, a weak worker may not be able to easily open the packaging box.

The present invention provides a packaging box that can be easily opened with a small force in order to solve the above problems.

In order to achieve the above object, the packaging box of the present invention includes an inner surface plate extending from the end portion of the first face plate and an outer surface plate extending from the end portion of the second face plate, and the outer surface plate includes the outer surface plate. A packaging box that is sealed by stacking and adhering face plates, and is formed from the inner surface plate or the inner surface plate to the first face plate, and is pushed in in a sealed state to grip the outer surface plate. It is formed at a position deviated from the push-in portion forming the opening hole in the width direction orthogonal to the extension direction of the outer face plate with respect to the push-in portion in the sealed state, and the tip of the outer face plate is formed from the second face plate side. The fold curve pair is provided with a fold curve pair extending so as to be separated from each other toward, and the fold curve pair is located on the normal fold line located on the push-in portion side in the sealed state and on one side in the width direction with respect to the normal fold line. A plurality of adhesive portions between the inner surface plate and the outer surface plate, including the reverse folding line, are set at positions separated from each other in the width direction with the push-in portion sandwiched in a sealed state, and the outer surface plate is provided from the inner surface plate. In the case of separation, the outer surface plate receives a force in the separation direction at the formation position of the opening hole and is mountain-folded at the normal folding line and valley-folded at the reverse folding line, so that the adhesive portion on the other side in the width direction is peeled off. After starting, the adhesive portion on one side in the width direction begins to peel off.

In this case, the normal folding line extends from a base point located on the boundary line between the outer surface plate and the second face plate in a sealed state toward the tip of the outer surface plate so as to be inclined toward the pushing portion side. It is preferable that the folding line extends from the base point toward the tip of the outer surface plate in an inclined direction in one of the width directions, or extends from the base point toward one end in the width direction of the outer surface plate. ..

In this case, the plurality of adhesive portions include a first adhesive portion provided on the other side of the push-in portion in the width direction, and a second adhesive portion provided between the folding curve pairs. It is preferable to have.

In this case, in the sealed state, the outer surface plate is formed at a position deviated from the other of the outer surface plate in the width direction with respect to the pushed portion, and extends from the second surface plate side toward the tip of the outer surface plate so as to be separated from each other. The second folding curve pair is further provided with two folding curve pairs, which are located on the other side in the width direction from the second normal folding line and the second normal folding line located on the push-in portion side in the sealed state. The plurality of bonding portions further include a third bonding portion provided between the second folding curve pairs, and separates the outer surface plate from the inner surface plate. In this case, after the first adhesive portion and the second adhesive portion begin to peel off, the outer surface plate is mountain-folded at the second normal folding line and valley-folded at the second reverse folding line, whereby the third It is preferable that the bonded portion begins to peel off.

In this case, the second normal folding line is inclined toward the pushing portion side from the second base point located on the boundary line between the outer surface plate and the second face plate in the sealed state toward the tip of the outer surface plate. The second reverse folding line extends from the second base point toward the tip of the outer surface plate so as to be inclined in the other direction in the width direction, or from the second base point to the outer surface plate. It extends inclined toward the other end in the width direction, and the distance between the second base point and the center in the width direction of the pushing portion is larger than the distance between the base point and the center in the width direction of the pushing portion. Is also preferably set long.

In this case, it is preferable that the pushing portion includes a cut line cut along the contour of the opening hole while leaving a part as a remaining portion without cutting.

In this case, the cut line is formed from the inner surface plate or the inner surface plate to the first face plate so as to expose a part of the cut line from the outer surface plate in a sealed state, and the remaining portion is formed in the sealed state. It is preferable that the inner surface plate is formed so as to be covered with the outer surface plate.

In other cases, it is preferable that the cut line is formed from the inner face plate to the first face plate, and the remaining portion is formed on the first face plate.

In this case, it is preferable that the first face plate and the second face plate are provided so as to face each other, and the outer face plate is provided so as to cover the entire inner face plate in a sealed state.

In this case, the first face plate and the second face plate are further provided with a pair of side flaps which are provided in a state of being connected to the ends of the pair of third face plates facing each other and which overlap the inside of the inner face plate. It is preferable that the pair of side flaps are provided so as to face the pair of third face plates at positions deviated in the circumferential direction, and each of the pair of side flaps includes a notch portion that allows the push-in portion to be pushed in in a sealed state. ..

In other cases, the first face plates are provided in pairs facing each other, the second face plates are provided in pairs facing the pair of first face plates at positions deviated in the circumferential direction, and the inner face plates are provided. , The pair of outer surface plates are provided in a state of being connected to the end portions of the pair of first face plates, the pair of outer surface plates are provided in a state of being connected to the end portions of the pair of second face plates, and the pair of outer face plates are sealed. It is preferable that the pair of inner face plates is provided so as to cover a part of the inner face plates in the state.

Further, in another case, the body box includes a body box having an opening on one surface and a closed body fixed to the body box with the opening closed, and the body box is provided from the peripheral edge of the first face plate. The closing body includes the inner face plate forming at least one surface of the peripheral wall extending in the normal direction, and the closing body is connected to the second face plate formed so as to be able to close the opening and the end portion of the second face plate. It is preferable to include the outer surface plate which is provided in a vertical state and is adhered to the inner surface plate when the opening is closed by the second face plate.

According to the present invention, the packaging box can be easily opened with a small force.

It is a perspective view which shows the packaging box which concerns on 1st Embodiment of this invention. It is a top view which shows the blank of the packaging box which concerns on 1st Embodiment of this invention. It is a side view which shows the procedure of sealing the packaging box which concerns on 1st Embodiment of this invention. It is a side view which shows the state which sealed the packaging box which concerns on 1st Embodiment of this invention. It is a perspective view which shows the state which started to open the packaging box which concerns on 1st Embodiment of this invention. It is a perspective view which shows the middle of opening of the packaging box which concerns on 1st Embodiment of this invention. It is a perspective view which shows the state which opened the packaging box which concerns on 1st Embodiment of this invention. It is a top view which shows the blank of the packaging box which concerns on 2nd Embodiment of this invention. It is a side view which shows the state which sealed the packaging box which concerns on 2nd Embodiment of this invention. It is a side view which shows the state which opened the packaging box which concerns on 2nd Embodiment of this invention. It is a top view which shows the blank of the packaging box which concerns on 3rd Embodiment of this invention. It is a side view which shows the state which opened the packaging box which concerns on 3rd Embodiment of this invention. It is a perspective view which shows the state which opened the packaging box which concerns on 1st modification of 1st Embodiment of this invention. It is a side view which shows the packaging box which concerns on the 2nd modification of 1st Embodiment of this invention. It is a perspective view which shows the packaging box which concerns on 4th Embodiment of this invention. It is a perspective view which shows the packaging box which concerns on 5th Embodiment of this invention. It is an exploded perspective view which shows the packaging box which concerns on the modification of 5th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In this specification, terms indicating directions and positions are used, but these terms do not limit the technical scope of the present invention.

<First Embodiment: Outline of packaging box>
The packaging box 1 according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing a packaging box 1. FIG. 2 is a plan view showing a blank 6 of the packaging box 1.

As shown in FIG. 1, the packaging box 1 is a wraparound type case that is sealed by bending it so as to wrap a plurality of contents M1 and pasting the ends together. Specifically, the packaging box 1 includes a pair of inner flaps 17 extending from both ends of the bottom plate 12 and a pair of outer flaps 18 extending from both ends of the top plate 10. The packaging box 1 is a case in which each outer flap 18 is overlapped and adhered to each inner flap 17 to be sealed. More specifically, the packaging box 1 is a so-called full over flap type case in which substantially the entire inner flap 17 is covered with the outer flap 18. The content M1 is, for example, a can, a bottle, a resin container, or the like filled with food (beverage) or the like. The content M1 is formed, for example, in a substantially hemispherical shape extending from the lower surface toward the upper surface.

The packaging box 1 is formed by assembling the blank 6 shown in FIG. The blank 6 is formed by punching a sheet of corrugated cardboard with a paper container punching device. The corrugated cardboard is, for example, a corrugated cardboard 9A bonded with a front liner 9B and a back liner 9C (see FIG. 1). Note that FIG. 2 shows the front liner 9B side (outer surface side of the packaging box 1). In the present specification, the direction parallel to the corrugated cardboard inner shin 9A is referred to as the "step direction", and the direction orthogonal to the step direction is referred to as the "flow direction". “X” shown in the drawing indicates “step direction”, and “Y” indicates “flow direction”.

<Blank of packaging box>
As shown in FIG. 2, the blank 6 includes a top plate 10 (second face plate), a first side plate 11 (third side surface), a bottom plate 12 (first face plate), and a second side plate 13 (first side plate). Three-sided plate), a joint piece 14, a pair of first side flaps 15, a pair of second side flaps 16, a pair of inner flaps 17 (inner surface plates), and a pair of outer flaps 18 (outer surface plates). , Including.

The top plate 10, the first side plate 11, the bottom plate 12, the second side plate 13, and the joint piece 14 are formed in a state of being sequentially connected in the step direction. Each of the plates 10 to 14 is formed in a substantially rectangular plate shape having substantially the same dimensions in the flow direction. The dimension of the top plate 10 in the step direction is substantially the same as the dimension of the bottom plate 12 in the step direction. The dimension of the first side plate 11 in the step direction is substantially the same as the dimension of the second side plate 13 in the step direction. The dimension of the joint piece 14 in the step direction is shorter than the dimension of the second side plate 13 in the step direction.

The pair of first side surface flaps 15 are provided so as to be connected to both ends of the first side surface plate 11 in the flow direction. The pair of second side surface flaps 16 are provided so as to be connected to both ends of the second side surface plate 13 in the flow direction. Each of the first side surface flaps 15 and each second side surface flap 16 is formed in a substantially rectangular shape having substantially the same dimensions in the flow direction. The flow direction dimension (extension dimension) of each of the side flaps 15 and 16 is less than half of the stepwise dimension of the top plate 10 (bottom plate 12). The dimensions of the side flaps 15 and 16 in the step direction are substantially the same as the dimensions of the side plates 11 and 13 in the step direction.

The pair of inner flaps 17 are provided so as to be connected to both ends of the bottom plate 12 in the flow direction. The pair of outer flaps 18 are provided so as to be connected to both ends of the top plate 10 in the flow direction. Each of the inner flaps 17 and each outer flap 18 is formed in a substantially rectangular shape having substantially the same dimensions in the flow direction. The dimensions (extended dimensions) of the flaps 17 and 18 in the flow direction are substantially the same as the dimensions in the step direction of the first side plate 11 (second side plate 13). The extension dimensions of the flaps 17 and 18 are set to be slightly longer than the extension dimensions of the side flaps 15 and 16. The dimensions of the flaps 17 and 18 in the step direction are substantially the same as the dimensions of the bottom plate 12 (top plate 10) in the step direction.

A first ruled line 19A is formed at the boundary portion of each of the face plates and the like from 10 to 14. A second ruled line 19B is formed at the boundary between the flaps 15 to 16 and the face plates 10 to 13. Each of the first ruled line 19A and each second ruled line 19B is formed by crushing a corrugated cardboard linearly from the back liner 9C side in the thickness direction. The ruled lines 19A and 19B are folding lines for bending the corrugated cardboard so that the back liner 9C faces inward.

<Seal of packaging box>
Here, a step of packaging the content M1 with the blank 6 described above (procedure for sealing the packaging box 1) will be described with reference to FIGS. 1 to 4. FIG. 3 is a side view showing a procedure for sealing the packaging box 1. FIG. 4 is a side view showing a state in which the packaging box 1 is sealed. In this specification, the direction (step direction) orthogonal to the extension direction (flow direction) of each of the flaps 17 and 18 is also referred to as a "width direction".

The packaging box 1 is assembled automatically or semi-automatically by, for example, a packaging device (not shown). First, in the packaging device, with the blank 6 arranged on a flat surface, a plurality of (for example, six) contents M1 accumulated are placed on the bottom plate 12 (see FIG. 1). The six contents M1 are placed on the bottom plate 12 in an arrangement of, for example, three rows in the flow direction and two columns in the step direction. Subsequently, the packaging device bends the second side surface plate 13 and the joint piece 14 along the first ruled line 19A so as to cover the contents M1. Further, the packaging device bends the first side surface plate 11 and the top surface plate 10 along the first ruled line 19A so as to cover the contents M1. Then, the packaging device adheres the tip end portion of the top plate 10 stacked on the passage piece 14 with an adhesive. As the adhesive, for example, a hot melt adhesive, a synthetic resin emulsion adhesive, a double-sided tape, or the like can be used.

As described above, the bottom plate 12 and the top plate 10 are provided so as to face each other, and the first side plate 11 and the second side plate 13 are provided so as to face each other. The top plates and the like 10 and 12 are provided so as to face each of the side plates 11 and 13 at positions displaced by 90 ° in the circumferential direction. That is, each of the face plates 10 to 13 forms a substantially rectangular tubular peripheral wall 1A (see FIG. 1) and encloses the six contents M1.

Next, the packaging device closes the openings at both ends of the peripheral wall 1A in the flow direction by the flaps 15 to 18. Specifically, as shown in FIG. 3, the packaging device bends each of the first side surface flaps 15 and each second side surface flap 16 inward along the second ruled line 19B. In this state, the tip of the first side surface flap 15 and the tip of the second side surface flap 16 are separated from each other. Subsequently, as shown in FIG. 4, the packaging device bends each inner flap 17 inward along the second ruled line 19B. In this state, the side flaps 15 and 16 overlap the inside of the inner flap 17. After that, the packaging device applies an adhesive to the front liner 9B of the inner flap 17 or the back liner 9C of the outer flap 18 at two locations separated in the width direction (see the broken line circles in FIGS. 3 and 4). Finally, the packaging device bends each outer flap 18 inward along the second ruled line 19B, and adheres the outer flap 18 overlaid on the inner flap 17 with an adhesive.

As a result, the packaging box 1 is in a sealed state (see FIG. 1). In the present specification, the portion where the inner flaps 17 and the outer flaps 18 are adhered to each other via an adhesive is also referred to as an adhesive portion 21.

In the sealed state, each outer flap 18 is provided so as to cover substantially the entire inner flap 17 (see FIG. 4). The packaging box 1 is opened by peeling off the outer flap 18 of either one of the both end faces in the step direction from the inner flap 17. However, in the so-called full-over flap type packaging box 1, since the outer flap 18 covers substantially the entire inner flap 17, it is difficult for the operator to firmly grasp the outer flap 18. Further, in a situation where the outer flap 18 cannot be firmly grasped, it is often difficult to peel off the two adhesive portions 21 between the inner flap 17 and the outer flap 18. Therefore, the packaging box 1 according to the first embodiment includes an opening structure 22 that can be easily opened with a small force.

<Opening structure>
The opening structure 22 will be described with reference to FIGS. 2 to 4. The opening structure 22 includes a pair of push-in portions 23 and two sets of fold curve pairs 24. Each push-in portion 23 opens when the packaging box 1 is opened. Each folding curve pair 24 is a line for bending the outer flap 18 when the packaging box 1 is opened.

<Pushing part>
As shown in FIG. 2, the pair of push-in portions 23 are formed from the inner flap 17 to the bottom plate 12 (first face plate) so as to cross each of the second ruled lines 19B. Although the details will be described later, each pushing portion 23 is pushed in in a sealed state to form an opening hole H for gripping the outer flap 18. Since the pair of push-in portions 23 are formed symmetrically in FIG. 2, one push-in portion 23 will be described in the following description.

The pushing portion 23 is formed substantially in the center in the width direction of the inner flap 17 and the like. The pushing portion 23 is formed in a substantially trapezoidal shape slightly extending from the bottom plate 12 toward the inner flap 17. The push-in portion 23 extends longer toward the inner flap 17 side than the bottom plate 12 side when the second ruled line 19B is used as a reference. The pushing portion 23 includes a cut line 23B cut along the contour of the opening hole H while leaving a part as the remaining portion 23A without cutting.

The remaining portion 23A is one side of the pushing portion 23 extending in the width direction on the inner flap 17 side. The remaining portion 23A is formed on the inner flap 17 so as to be covered with the outer flap 18 in the sealed state (see FIG. 4). A reverse ruled line 23C is formed in the remaining portion 23A along the step direction. The reverse ruled line 23C is formed by crushing a corrugated cardboard linearly in the thickness direction from the front liner 9B side. The reverse ruled line 23C is a folding line for bending the corrugated cardboard so that the front liner 9B faces inward.

The cut line 23B is formed in a substantially U shape extending from both ends of the remaining portion 23A toward the bottom plate 12 side. The cut line 23B is formed from the inner flap 17 to the bottom plate 12 (first face plate) so that a part of the cut line 23B is exposed from the outer flap 18 in a sealed state. The cut line 23B is formed by so-called perforations in which a plurality of cuts are arranged at substantially equal intervals. Each cut is formed by penetrating a cutting tool in the thickness direction of the corrugated cardboard. The cut line 23B is not limited to the so-called perforation, and may be formed of, for example, a half-cut line obtained by cutting only the back liner 9C or cutting from the back liner 9C to the middle (approximately half) in the thickness direction of the corrugated cardboard. Good. Further, each of the side flaps 15 and 16 described above extends to a position where the tip thereof slightly exceeds the cut line 23B in the sealed state (see FIG. 3). That is, each of the side flaps 15 and 16 is set to an extension dimension that does not hinder the pushing of the pushing portion 23 in the sealed state.

<Fold curve>
As shown in FIG. 2, the two sets of fold curve pairs 24 are formed in one of the width directions of the outer flaps 18 on the opposite side of the passage piece 14. Since the two sets of fold curve pairs 24 are formed symmetrically in FIG. 2, one set of fold curve pairs 24 will be described below.

The folding curve pair 24 is formed at a position deviated from the pushing portion 23 in the width direction of the outer flap 18 in the sealed state (see FIG. 4). The folded curve pair 24 is formed at a position closer to the second side surface plate 13 side in the outer flap 18 in the sealed state (see FIG. 4). The folded curve pairs 24 extend from the top plate 10 side toward the tip of the outer flap 18 so as to be separated from each other. That is, the folding curve pair 24 is formed in a substantially V shape extending outward in the flow direction.

The folding curve pair 24 includes a normal folding line 24A and a reverse folding line 24B. The normal folding line 24A is located on the push-in portion 23 side in the sealed state, and the reverse folding line 24B is located on one side in the width direction (one side in the step direction) with respect to the normal folding line 24A (see FIG. 4). Specifically, the normal folding line 24A and the reverse folding line 24B extend from the base point P1 located on the boundary line between the outer flap 18 and the top plate 10 (on the second ruled line 19B). More specifically, as shown in FIG. 4, the normal folding line 24A extends in an inclined state from the base point P1 toward the tip of the outer flap 18 toward the pushing portion 23 in the sealed state. The reverse polygonal line 24B extends inclined from the base point P1 toward one end in the width direction of the outer flap 18. The angle α formed by the normal folding line 24A and the second ruled line 19B is set to, for example, 65 °. The angle β formed by the normal folding line 24A and the reverse folding line 24B is set to, for example, 70 °. The above-mentioned angle α and angle β can be set in the range of 30 ° to 80 °, respectively.

The normal folding line 24A is formed by crushing the outer flap 18 linearly in the thickness direction from the back liner 9C side. The reverse folding line 24B is formed by crushing the outer flap 18 linearly in the thickness direction from the front liner 9B side. The outer flap 18 is configured such that the back liner 9C is bent inward along the normal folding line 24A, and the front liner 9B is bent inward along the reverse folding line 24B.

As shown in FIGS. 3 and 4, the two adhesive portions 21 of the inner flap 17 and the outer flap 18 are set at positions separated in the width direction with the pressing portion 23 sandwiched in the sealed state. The two adhesive portions 21 include a first adhesive portion 21A provided on the other side in the width direction from the push-in portion 23, and a second adhesive portion 21B provided between the folding curve pairs 24.

<Opening the packaging box>
Next, a procedure for opening the sealed packaging box 1 (action of the opening structure 22) will be described with reference to FIGS. 5 to 7. FIG. 5 is a perspective view showing a state in which the packaging box 1 has begun to be opened. FIG. 6 is a perspective view showing the middle of opening the packaging box 1. FIG. 7 is a perspective view showing a state in which the packaging box 1 is opened.

As shown in FIG. 5, the operator pushes the pushing portion 23 exposed on the bottom plate 12 side with a finger. Then, the pushing portion 23 is cut along the cut line 23B and bent inward along the second ruled line 19B to form an opening hole H for gripping the outer flap 18. At this time, since the contents M1 are arranged in two rows in the width direction and the first side surface flap 15 and the second side surface flap 16 are separated from each other (see FIG. 3), the pushing portion 23 is a side flap 15, It bends so that it fits between the contents M1 in two rows without being restricted by 16.

Subsequently, as shown in FIG. 6, the operator grasps the outer flap 18 with the finger pushing the pushing portion 23 inserted into the opening hole H, and pulls the outer flap 18 outward together with the pushing portion 23. Then, the pushing portion 23 bends outward along the reverse ruled line 23C. Further, the first adhesive portion 21A begins to peel off, and the other side in the width direction of the outer flap 18 begins to separate substantially parallel to the inner flap 17. On the other hand, one of the outer flaps 18 in the width direction has a mountain fold along the normal fold line 24A and a valley fold along the reverse fold line 24B. Gradually start to move away. That is, the other side of the outer flap 18 in the width direction is obliquely separated from the inner flap 17. Therefore, after the first adhesive portion 21A begins to peel off, the second adhesive portion 21B begins to peel off.

As shown in FIG. 7, when the operator further pulls the outer flap 18 or the like, the first adhesive portion 21A is peeled off, and then the second adhesive portion 21B is peeled off. That is, the outer flap 18 is separated from the inner flap 17. By the above. The packaging box 1 is opened. When the first and second adhesive portions 21A and 21B are peeled off, the outer flap 18 may be peeled off from the adhesive, and the adhesive attached to the outer flap 18 may be peeled off from the inner flap 17.

According to the packaging box 1 according to the first embodiment described above, the push-in portion 23 is pushed in to form the opening hole H, so that the operator puts a finger (or a hand) in the opening hole H and puts a finger (or a hand) in the opening hole H to form the outer flap 18. Can be firmly grasped. As a result, the operator can appropriately pull the outer flap 18, so that the work of peeling the outer flap 18 from the inner flap 17 can be efficiently performed.

Further, in the packaging box 1 according to the first embodiment, when the outer flap 18 is separated from the inner flap 17, the outer flap 18 receives a force in the separation direction at the forming position of the opening hole H and folds at the normal folding line 24A. By making a valley fold along the reverse folding line 24B, the first adhesive portion 21A in the width direction begins to peel off, and then the second adhesive portion 21B in the width direction begins to peel off. According to this configuration, the outer flap 18 begins to separate from the inner flap 17 in order from the other in the width direction to the other in the axial direction while the forward folding line 24A and the reverse folding line 24B are bent in opposite directions. In this way, since the timing of peeling (releasing the bonded state) the two adhesive portions 21A and 21B is different, the force required for peeling the outer flap 18 from the inner flap 17 can be reduced. That is, the packaging box 1 can be easily opened with a small force.

Further, according to the packaging box 1 according to the first embodiment, the outer flap 18 is positive in the process of peeling the outer flap 18 from the inner flap 17 by extending the normal folding line 24A and the reverse folding line 24B from one base point P1. It can be bent in an appropriate direction along the folding line 24A and the reverse folding line 24B.

Further, according to the packaging box 1 according to the first embodiment, the pushing portion 23 is in a state of being connected to the inner flap 17 by the remaining portion 23A even when the opening hole H is opened (FIG. 7). reference). Therefore, it is possible to prevent the push-in portion 23 from being separated from the package box 1 after opening and becoming separate waste. As a result, the package box 1 and the push-in portion 23 after opening can be combined into one, and for example, the time and effort required for collecting waste can be reduced.

Further, according to the packaging box 1 according to the first embodiment, since a part of the cut line 23B extends to the bottom plate 12 and is exposed to the outside, the operator can easily recognize the position of the pushing portion 23. At the same time, the pushing portion 23 can be pushed in appropriately. Further, the pushing portion 23 is pushed in and pulled outward together with the outer flap 18, and is configured to rotate about the remaining portion 23A (reverse ruled line 23C). As a result, it is possible to prevent the push-in portion 23 from being torn off from the inner flap 17.

<Second Embodiment>
The packaging box 2 according to the second embodiment will be described with reference to FIGS. 8 to 10. FIG. 8 is a plan view showing a blank 7 of the packaging box 2. FIG. 9 is a side view showing a state in which the packaging box 2 is sealed. FIG. 10 is a side view showing a state in which the packaging box 2 is opened. In the following description, the same components as those of the packaging box 1 according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The packaging box 2 (peripheral wall 2A) is formed to have a larger (longer) dimension in the width direction than the packaging box 1 (peripheral wall 1A) according to the first embodiment. As shown in FIG. 8, in the blank 7 of the packaging box 2, the top plate 30, the bottom plate 32, the inner flaps 37, and the outer flaps 38 are formed longer in the step direction than those according to the first embodiment. There is. In this packaging box 2, for example, nine contents M1 (three rows in the flow direction and three columns in the step direction) are sealed in a wrapped state. Since the blank 7 of the packaging box 2 is substantially the same as the blank 6 of the packaging box 1 according to the first embodiment except that the lengths of the top plate 30 and the like in the step direction are different, detailed description thereof will be omitted. To do. Further, since the procedure for sealing the packaging box 2 is the same as the procedure for sealing the packaging box 1 according to the first embodiment, detailed description thereof will be omitted.

As shown in FIGS. 8 and 9, the opening structure 40 of the packaging box 2 includes a pair of push-in portions 23, two sets of fold curve pairs 24, and two sets of second fold curve pairs 41. There is. Since the two sets of the second fold curve pairs 41 are formed symmetrically in FIG. 8, one set of the second fold curve pairs 41 will be described below.

The second folding curve pair 41 is formed at a position shifted to the other side in the width direction of the outer flap 38 with respect to the pushing portion 23 in the sealed state (see FIG. 9). The second folding curve pair 41 is formed at a position closer to the first side surface flap 15 side in the outer flap 38 (see FIG. 8). The second folding curve pair 41 extends from the top plate 30 (peripheral wall 2A) side toward the tip of the outer flap 38 so as to be separated from each other.

The second folding curve pair 41 includes a second normal folding line 41A and a second reverse folding line 41B. The second normal folding line 41A is located on the push-in portion 23 side in the sealed state, and the second reverse folding line 41B is located on the other side in the width direction from the second normal folding line 41A. Specifically, the second normal folding line 41A is directed from the second base point P2 located on the boundary line between the outer flap 38 and the top plate 30 (on the second ruled line 19B) in the sealed state toward the tip of the outer flap 38. It extends at an angle toward the push-in portion 23 (see FIG. 9). The second reverse folding line 41B extends inclined from the second base point P2 toward the other end in the width direction of the outer flap 38. The second folding curve pair 41 is formed in a substantially V shape by reversing the folding curve pair 24 in the width direction. Since the second normal folding line 41A is substantially the same as the normal folding line 24A and the second reverse folding line 41B is substantially the same as the reverse folding line 24B, detailed description thereof will be omitted.

Since the inner flap 37 is formed longer than the inner flap 17 in the width direction, each of the pushing portions 23 is formed at a position relatively closer to one side in the width direction (see FIG. 9). Therefore, the distance L2 between the second base point P2 and the center of the pushing portion 23 in the width direction is set longer than the distance L1 between the base point P1 and the center of the pushing portion 23 in the width direction (see FIG. 9). ). Further, the inner flap 37 and the outer flap 38 are adhered to each other via a third adhesive portion 21C in addition to the first adhesive portion 21A and the second adhesive portion 21B. The third adhesive portion 21C is provided between the second folding curve pairs 41 (see FIG. 9).

<Opening the packaging box>
Next, with reference to FIG. 10, a procedure for opening the sealed packaging box 2 (action of the opening structure 40) will be described.

Similar to the opening step of the packaging box 1 according to the first embodiment, the operator grasps the outer flap 38 with a finger (hand) in the opening hole H and pulls the outer flap 38 outward together with the pushing portion 23. .. Then, the first adhesive portion 21A and the second adhesive portion 21B start to be peeled off in order.

When the operator pulls the outer flap 38 or the like further, the other side in the width direction of the outer flap 38 makes a mountain fold along the second normal folding line 41A and a valley fold along the second reverse folding line 41B. It gradually starts to separate from the center side in the width direction toward the other side in the width direction with respect to the flap 37. Therefore, after the first adhesive portion 21A and the second adhesive portion 21B begin to peel off, the third adhesive portion 21C begins to peel off. Then, when the first adhesive portion 21A, the second adhesive portion 21B, and the third adhesive portion 21C are peeled off in order, the packaging box 2 is in an opened state.

In the packaging box 2 according to the second embodiment described above, when the outer flap 38 is separated from the inner flap 37, the outer flap 38 becomes the second after the first adhesive portion 21A and the second adhesive portion 21B begin to peel off. The third adhesive portion 21C begins to peel off by making a mountain fold at the forward fold line 41A and a valley fold at the second reverse fold line 41B. Further, the second folding curve pair 41 was formed at a position farther from the pushing portion 23 than the folding curve pair 24. According to this configuration, the timing of releasing the bonded state by the three adhesive portions 21 (21A to 21C) can be shifted, so that the packaging box 2 can be easily opened with a small force.

<Third Embodiment>
The packaging box 3 according to the third embodiment will be described with reference to FIGS. 11 and 12. FIG. 11 is a plan view showing a blank 8 of the packaging box 3. FIG. 12 is a side view showing a state in which the packaging box 3 is opened. In the following description, the same components as those of the packaging box 1 according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The packaging box 3 (peripheral wall 3A) is formed to have a shorter dimension in the step direction (width direction) and a shorter dimension in the flow direction than the packaging box 1 (peripheral wall 1A) according to the first embodiment. As shown in FIG. 11, in the blank 8 of the packaging box 3, the top plate 50, the bottom plate 52, the inner flaps 57, and the outer flaps 58 are formed shorter in the step direction than those according to the first embodiment. There is. Further, the top plate 50, the first side plate 51, the bottom plate 52, the second side plate 53, and the joint piece 54 are formed shorter in the flow direction than those according to the first embodiment. The packaging box 3 contains a content M2 that is thinner (smaller in diameter) than the content M1 contained in the packaging box 1 according to the first embodiment (see FIG. 12). In this packaging box 3, for example, six contents M2 (two rows in the flow direction and three columns in the step direction) are sealed in a wrapped state. Since the top plate 50 and the like are substantially the same as the top plate 10 and the like of the blank 6 of the packaging box 1 according to the first embodiment except that their sizes are different, detailed description thereof will be omitted.

Further, in the blank 8 of the packaging box 3, a pair of first side surface flaps 55 and a pair of second side surface flaps 56 overlapping inside each inner flap 57 are formed in a shape different from that according to the first embodiment. There is. Since the pair of first side surface flaps 55 are formed symmetrically in FIG. 11, the first side surface flaps 55 in one of the flow directions will be described below. For the same reason as this, the second side flap 56 on one side in the flow direction will be described below.

As shown in FIGS. 11 and 12, the first side surface flap 55 and the second side surface flap 56 include notches 55A and 56A in which one corner on the inner flap 57 side is cut out in a substantially rectangular shape, respectively. The first side surface flap 55 and the second side surface flap 56 are formed in a substantially L shape symmetrical with respect to the step direction with the inner flap 57 interposed therebetween. The pair of notches 55A and 56A form an opening that allows the pushing portion 23 to be pushed in the sealed state (see FIG. 12). Since the procedure for sealing and opening the packaging box 3 is the same as the procedure for sealing and opening the packaging box 1 according to the first embodiment, detailed description thereof will be omitted.

In the packaging box 3 according to the third embodiment described above, the first side flap 55 and the second side flap 56 are configured to include notches 55A and 56A that allow the pushing portion 23 to be pushed in the sealed state, respectively. .. According to this configuration, it is possible to prevent the pushing portion 23 pushed in when the packaging box 3 is opened from interfering with the side flaps 55 and 56. Thereby, the opening hole H for the operator to grip the outer flap 58 can be appropriately formed.

<First modification>
In the packaging boxes 1 to 3 according to the first to third embodiments, the remaining portion 23A of the pushing portion 23 is formed on the inner flaps 17, 37, 57, but the present invention is not limited to this. For example, as shown in FIG. 13, the cut line 23B is formed from the inner flap 17 (37,57) to the bottom plate 12 (32,52), and the remaining portion 23A is the bottom plate 12 (32,52). It may be formed in. According to this configuration, when the pushing portion 23 is pushed in, it rotates inward about the remaining portion 23A and separates from the outer flaps 18 (38, 58). The operator can put a finger (hand) in the opening hole H and pull only the outer flap 18 (38, 58) outward. As a result, since the pushing portion 23 is not pulled together with the outer flap 18 (38, 58), it is possible to effectively prevent the pushing portion 23 from being torn from the inner flap 17 (37, 57).

<Second modification>
Further, since the packaging boxes 1 to 3 according to the first to third embodiments are full over flap type wraparound cases, the push-in portion 23 crosses the second ruled line 19B and is inside the bottom plates 12, 32, 52. The flaps were formed at 17, 37, 57, but the present invention is not limited to this. For example, as shown in FIG. 14, when the outer flap 18 (38,58) does not cover the entire inner flap 17 (37,57) and the lower part of the inner flap 17 (37,57) is largely exposed. The push-in portion 23 may be formed only on the inner flap 17 (37, 57). In this case, it is preferable that the cut line 23B is formed on the inner flap 17 (37, 57) so that a part of the cut line 23B is exposed from the outer flap 18 (38, 58) in a sealed state.

Further, in the packaging boxes 1 to 3 according to the first to third embodiments, since the outer flaps 18, 38, 58 are connected to the top plates 10, 30, 50, the pushing portion 23 is the inner flaps 17, 37, Although it was formed from 57 to the bottom plates 12, 32, 52, the present invention is not limited to this. For example, when the outer flaps 18, 38, 58 are connected to the bottom plates 12, 32, 52 and the inner flaps 17, 37, 57 are connected to the top plate 10, etc., the pushing portion 23 is the inner flap 17, It may be formed from 37, 57 to the top plates 10, 30, 50.

<Fourth Embodiment>
Further, in the packaging boxes 1 to 3 according to the first to third embodiments, the opening structures 22 and 40 have been applied to the wraparound case, but the present invention is not limited to this. For example, as shown in FIG. 15, the packaging box 4 according to the fourth embodiment may be a so-called type A corrugated cardboard box. In the following description, the same components as those of the packaging boxes 1 to 3 according to the first to third embodiments (including each modification; the same shall apply hereinafter) are designated by the same reference numerals, and the description thereof will be omitted. To do.

The packaging box 4 includes a substantially rectangular tubular peripheral wall 4A in which a pair of end face plates 60 and a pair of side plates 62 are alternately connected. The pair of side plates 62 (first surface plates) are provided so as to face each other. The pair of end face plates 60 (second face plates) are provided so as to face each other at positions displaced by 90 ° in the circumferential direction with respect to the pair of side plates 62. A pair of inner flaps 67 (inner surface plates) are provided so as to be connected to the upper end portions of the pair of side plate 62s. A pair of outer flaps 68 (outer surface plates) are provided in a state of being connected to the upper end portions of the pair of end face plates 60.

When the pair of inner flaps 67 are bent so as to close the upper surface opening of the peripheral wall 4A, the tips of the pair of inner flaps 67 are brought into contact with each other at substantially the center. The pair of outer flaps 68 are provided so as to cover a part of the pair of inner flaps 67 in a sealed state. The pair of outer flaps 68 are adhered to the pair of inner flaps 67 via the first and second adhesive portions 21A and 21B. Although not shown, the bottom outer flaps are continuously provided at the lower ends of the pair of side plates 62, and the bottom inner flaps are continuously provided at the lower ends of the pair of end face plates 60. The lower surface opening of the peripheral wall 4A is closed by bending the pair of bottom inner flaps and then the pair of bottom outer flaps. A pair of outer bottom flaps are butted in the center.

In the packaging box 4, the push-in portion 23 is formed in at least one of the pair of inner flaps 67. The pushing portion 23 is formed at a position where it is half covered by the outer flap 68 in the sealed state. The remaining portion 23A of the pushing portion 23 is formed at a position covered by the outer flap 68. The remaining portion 23A may be formed at a position exposed from the outer flap 68. Further, the folding curve pair 24 is formed on the outer flap 68 so as to straddle the second adhesive portion 21B in the sealed state. The folded curve pair 24 is formed in a substantially V shape extending from the end face plate 60 side toward the tip of the outer flap 68. The second folding curve pair 41 may be formed on the outer flap 68.

According to the packaging box 4 according to the fourth embodiment described above, the same effects as those of the packaging boxes 1 to 3 according to the first to third embodiments described above can be obtained.

<Fifth Embodiment>
Further, in the packaging boxes 1 to 4 according to the first to fourth embodiments, the opening structures 22 and 40 have been applied to a so-called one-piece corrugated cardboard box, but the present invention is not limited thereto. For example, as shown in FIG. 16, the packaging box 5 according to the fifth embodiment may be a so-called two-piece corrugated cardboard box including a lid 5C separable from the body box 5B. In the following description, the same components as those of the packaging boxes 1 to 4 according to the first to fourth embodiments are designated by the same reference numerals, and the description thereof will be omitted.

The packaging box 5 includes a body box 5B and a lid 5C (closed body). The body box 5B has an opening 5D on the upper surface. The lid 5C is fixed to the body box 5B with the opening 5D closed. The body box 5B includes a peripheral wall 5A extending upward (normal direction) from the peripheral edge of the bottom plate 72 (first face plate). The peripheral wall 5A is formed in a substantially rectangular tubular shape by a pair of side plates 71 and a pair of end face plates 77 (inner surface plates). The pair of side plates 71 are provided so as to face each other, and the pair of end face plates 77 are provided so as to face each other at positions displaced by 90 ° in the circumferential direction with respect to the pair of side plates 71. The lid body 5C includes a lid face plate 70 (second face plate) and a pair of outer flaps 78. The lid face plate 70 is bridged between a pair of end face plates 77, and is formed so that the opening 5D can be closed. The pair of outer flaps 78 are provided in a state of being connected to both ends of the lid surface plate 70.

When the opening 5D is closed by the lid face plate 70, the pair of outer flaps 78 are bent downward and adhered to the pair of end face plates 77. The pair of outer flaps 78 are adhered to the pair of end face plates 77 via the first and second adhesive portions 21A and 21B.

In the packaging box 5, the push-in portion 23 is formed on at least one of the pair of end face plates 77. The pushing portion 23 is formed at a position where it is half covered by the outer flap 78 in the sealed state. The remaining portion 23A of the pushing portion 23 is formed at a position covered by the outer flap 78. The remaining portion 23A may be formed at a position exposed from the outer flap 78. Further, the folding curve pair 24 is formed on the outer flap 78 so as to straddle the second adhesive portion 21B in the sealed state. The folded curve pair 24 is formed in a substantially V shape extending from the lid surface plate 70 side toward the tip of the outer flap 78. The second folding curve pair 41 may be formed on the outer flap 78.

According to the packaging box 5 according to the fifth embodiment described above, the same effects as those of the packaging boxes 1 to 4 according to the first to fourth embodiments described above can be obtained.

In the packaging box 5 according to the fifth embodiment, a pair of outer flaps 78 are continuously provided at opposite ends of the lid plate 70, but the present invention is not limited to this. For example, as shown in FIG. 17, as the packaging box 5 according to the modified example of the fifth embodiment, the lid body 5F includes four outer face plates 88 connected to the four sides of the lid plate 70, and is substantially open downward. It may be formed in a tray shape. The body box 5E is formed in a tray shape having an opening 5D on the upper surface. In this case, it is preferable that the lid 5F is covered from above so as to cover the entire body box 5E, and the pair of outer face plates 88 facing each other are adhered to the pair of end face plates 77 of the body box 5E. Further, it is preferable that the push-in portion 23 is formed from each end face plate 77 to the bottom plate 72, similarly to the packaging box 1 and the like according to the first embodiment. Further, it is preferable that the folding curve pair 24 is formed on each outer face plate 88 to be adhered to each end face plate 77.

In the packaging box 5, the lids 5C and 5F constitute the upper surface of the body boxes 5B and 5E as an example of the closed body, but the present invention is not limited to this. For example, the packaging box may include a body box with an open bottom surface and a tray (another example of the obstruction body) that closes the bottom surface opening of the body box (not shown).

In the packaging boxes 1 to 3 and 5 according to the first to third and fifth embodiments (including modified examples of the fifth embodiment, the same applies hereinafter), the inner flaps 17, 37, 57 or the end face plate 77 are used. Although one push-in portion 23 is formed for each, the present invention is not limited to this, and a plurality of push-in portions 23 may be formed for each of the inner flaps 17, 37, 57 or for each end face plate 77. Further, in the packaging boxes 1 and 3 according to the first and third embodiments, the push-in portion 23 is formed substantially in the center of the inner flaps 17 and 57 in the width direction, but the push-in portion 23 is not limited to this, and the push-in portion 23 is an inner flap. It may be formed at a position deviated from one or the other in the width direction of 17, 57.

Further, in the packaging boxes 1 to 5 according to the first to fifth embodiments, the folding curve pair 24 (normal folding line 24A, reverse folding line 24B) and the second folding curve pair 41 (second normal folding line 41A, second normal folding line 41A, second). The reverse folding line 41B) extends from the base end (outer end) of the outer flaps 18, 38, 58, 68, 78 (outer face plate 88), but the present invention is not limited to this. For example, the terminal of the folding curve pair 24 and the terminal of the second folding curve pair 41 reach the base end and the tip end (outer end) of the outer flaps 18, 38, 58, 68, 78 (outer face plate 88), respectively. It does not have to be. That is, the folding curve pair 24 and the like may be formed between the base end and the tip end of the outer flaps 18, 38, 58, 68, 78 (outer face plate 88). Further, the normal polygonal line 24A and the reverse polygonal line 24B extend from one base point P1, but the present invention is not limited to this, and may extend from two different base points. That is, the base ends of the normal folding line 24A and the reverse folding line 24B may be separated from each other. Similarly, the second normal folding line 41A and the second reverse folding line 41B may extend from different base points.

Further, in the packaging boxes 1 to 5 according to the first to fifth embodiments, the reverse folding line 24B is inclined toward one end in the width direction of the outer flaps 18, 38, 58, 68, 78 (outer face plate 88). However, the reverse folding line 24B may extend from the base point P1 toward the tip of the outer flaps 18, 38, 58, 68, 78 (outer face plate 88) so as to be inclined in one direction in the width direction (shown). Z). Further, in the packaging box 2 according to the second embodiment, the second reverse folding line 41B is inclined toward the other end in the width direction of the outer flap 38, but the second reverse folding line 41B is not limited to this. It may extend from the second base point P2 toward the tip of the outer flap 38 so as to be inclined in the other direction in the width direction.

Further, in the packaging boxes 1 to 5 according to the first to fifth embodiments, a folding curve pair 24 is formed for each of the outer flaps 18, 38, 58, 68, 78 (outer face plate 88), but the present invention is limited to this. Instead, the folding curve pair 24 may be formed on only one of the pair of outer flaps 18, 38, 58, 68, 78 (pair of outer face plates 88). Similarly, the second folding curve pair 41 may be formed on only one of the pair of outer flaps 38 (68, 78, etc.). In these cases, the push-in portion 23 may also be formed on only one of the pair of inner flaps 17, 37, 57, 67, or on only one of the pair of end face plates 77.

Further, in the packaging boxes 1, 3, 4, and 5 according to the first, third, fourth, and fifth embodiments, the adhesive portions 21 are provided at two or more locations, but the present invention is not limited to this. You may be. Similarly, in the packaging box 2 according to the second embodiment, the adhesive portions 21 may be provided at three or more places. Further, in the packaging boxes 1 to 5 according to the first to fifth embodiments, the second adhesive portion 21B and the third adhesive portion 21C are set between the folding curve pair 24 and the second folding curve pair 41. However, the present invention is not limited to this. For example, the second adhesive portion 21B and the third adhesive portion 21C may be set outside the reverse folding line 24B and the second reverse folding line 41B in the width direction.

Further, the opening structures 22 and 40 of the packaging boxes 1 to 5 according to the first to fifth embodiments are not limited to the wraparound case, the A type and the like boxes, and various types in which the outer flap is laminated and adhered to the inner flap. Can be applied to the box. The packaging boxes 1 to 5 according to the first to fifth embodiments are formed of corrugated cardboard made of paper, but the present invention is not limited to this, and may be formed of, for example, thick paper or a resin plate.

The description of the embodiment shows one aspect of the packaging box according to the present invention, and the technical scope of the present invention is not limited to the above embodiment.

1-5 Packaging box 1A-5A Peripheral wall 5B, 5E Body box 5C, 5F Lid body (closed body)
5D opening 10, 30, 50 Top plate (second surface plate)
11,51 1st side plate (3rd side plate)
12, 32, 52, 72 Bottom plate (first face plate)
13,53 2nd side plate (3rd side plate)
17,37,57,58 Inner flap (inner plate)
18, 38, 58, 68, 78 Outer flap (outer surface plate)
21 Adhesive part 21A 1st adhesive part 21B 2nd adhesive part 21C 3rd adhesive part 23 Pushing part 23A Remaining part 23B Cut line 24 Folded curve vs. 24A Normal fold line 24B Reverse fold line 41 2nd fold curve vs. 41A 2nd normal fold line 41B Second reverse folding line 55 First side flap 55A, 56A Notch 56 Second side flap 60 End face plate (second face plate)
62 Side plate (first surface plate)
70 Lid face plate (second face plate)
77 End face plate (inner face plate)
88 Outer side plate (outer surface plate)
H opening hole P1 base point P2 second base point

Claims (7)

Inner face plates (17, 37, 57, 77) extending from the ends of the first face plate (12, 32, 52, 72) and extending from the ends of the second face plate (10, 30, 50, 70). A packaging box (1 to 3, 5) including an outer surface plate (18 , 38, 58, 88) and sealed by laminating and adhering the outer surface plate to the inner surface plate.
Is formed from the front Symbol inner plate on the first surface plate, indentation forming the opening hole (H) for gripping the outer surface plate by being pushed by the sealed state (23),
In the sealed state, it is formed at a position shifted to one side in the width direction orthogonal to the extending direction of the outer surface plate with respect to the pushed portion, and extends from the second surface plate side toward the tip of the outer surface plate so as to be separated from each other. With a pair of folding curves (24),
The pushing portion includes a cut line (23B) cut along the contour of the opening hole while leaving a part as a remaining portion (23A) without cutting.
The push-in portion is formed in a trapezoidal shape extending in the width direction toward the remaining portion.
The cut line is formed from the inner surface plate to the first face plate so as to expose a part of the cut line from the outer surface plate in a sealed state.
The remaining portion is formed on the inner surface plate so as to be covered with the outer surface plate in a sealed state.
A reverse ruled line (23C) for bending the push-in portion outward is formed in the remaining portion.
The folding curve pair includes a normal folding line (24A) located on the pushing portion side in a sealed state and a reverse folding line (24B) located on one side in the width direction of the normal folding line.
The normal folding line extends from a base point (P1) located on the boundary line between the outer surface plate and the second face plate in a sealed state toward the tip of the outer surface plate so as to be inclined toward the pushing portion side.
The reverse polygonal line extends inclined from the base point toward one end in the width direction of the outer face plate.
A plurality of adhesive portions (21) between the inner surface plate and the outer surface plate are set at positions separated in the width direction with the push-in portion sandwiched in a sealed state.
When the outer surface plate is separated from the inner surface plate, the push-in portion having the opening hole formed is pulled together with the outer surface plate in the separation direction and bent along the reverse ruled line, and the outer surface plate is formed at the position where the opening hole is formed. After receiving a force in the separation direction to make a mountain fold at the normal fold line and a valley fold at the reverse fold line, the adhesive portion (21A) of the other in the width direction begins to peel off, and then the adhesion of one in the width direction. Part (21B) begins to peel off,
A packaging box characterized in that, in a state where the outer surface plate is separated from the inner surface plate, the push-in portion is connected to the inner surface plate via the remaining portion. The plurality of adhesive portions are
With the first adhesive portion (21A) provided on the other side in the width direction from the push-in portion,
The packaging box according to claim 1, further comprising a second adhesive portion (21B) provided between the folding curve pairs. A second fold formed in a sealed state at a position deviated from the other of the outer surface plate in the width direction with respect to the push-in portion, and extending from the second surface plate side toward the tip of the outer surface plate. Further equipped with a pair of curves (41)
The second folding curve pair consists of a second normal folding line (41A) located on the push-in portion side in a sealed state and a second reverse folding line located on the other side in the width direction from the second normal folding line. (41B) and, including
The plurality of adhesive portions further include a third adhesive portion (21C) provided between the second folding curve pairs.
When the outer surface plate is separated from the inner surface plate, after the first adhesive portion and the second adhesive portion begin to peel off, the outer surface plate is mountain-folded at the second normal folding line and the second reverse folding line. The packaging box according to claim 2 , wherein the third adhesive portion begins to peel off when the third adhesive portion is broken at the valley. The second normal folding line is inclined toward the pushing portion side from the second base point (P2) located on the boundary line between the outer surface plate and the second face plate in the sealed state toward the tip of the outer surface plate. It is extended and
It said second inverse fold line extends inclined toward the other widthwise end of the outer surface plate from the previous SL second base point,
The distance (L2) between the second base point and the center of the pushing portion in the width direction is set longer than the distance (L1) between the base point and the center of the pushing portion in the width direction. The packaging box according to claim 3, which is characterized. The first face plate and the second face plate are provided so as to face each other.
The packaging box according to claim 1 to 4 , wherein the outer surface plate (18, 38, 58) is provided so as to cover the entire inner surface plate (17, 37, 57) in a sealed state. .. A pair of side flaps (55, 56) that are provided in a state of being connected to the ends of a pair of third face plates (51, 53) facing each other and that overlap the inside of the inner face plate are further provided.
The first face plate and the second face plate are provided so as to face each other at positions displaced in the circumferential direction with respect to the pair of third face plates.
The packaging box according to claim 1 to 5 , wherein each of the pair of side flaps includes a notch (55A, 56A) that allows the pushing portion to be pushed in in a sealed state. A body box (5B, 5E) having an opening (5D) on one side,
A closed body (5C, 5F) fixed to the body box with the opening closed is provided.
The body box includes the inner face plate (77) forming at least one surface of a peripheral wall (5A) extending in the normal direction from the peripheral edge of the first face plate (72).
The obstructed body
The second face plate (70) formed so as to be able to close the opening, and
It includes the outer surface plate (78,88) which is provided in a state of being connected to the end portion of the second face plate and is adhered to the inner surface plate when the opening is closed by the second face plate. The packaging box according to any one of claims 1 to 6.

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