JP6912352B2 - Packaging box - Google Patents

Description

The present invention relates to a packaging box.

A packaging box that is sealed by closing the end face of the peripheral wall is known.

For example, in the sealing package (cardboard box) described in Patent Document 1, solid printing (printing) with oil-based printing ink is performed on all the portions to which the sealing adhesive tape should be attached. Since the portion of the adhesive tape to be attached is surface-treated by this solid printing, the adhesive tape can be peeled off without damaging the cardboard box.

Jikkensho 46-20794

However, in the above-mentioned corrugated cardboard box, since the adhesive tape is solid-printed on all the parts to be attached, the adhesive tape is easily peeled off more than necessary. For example, when the corrugated cardboard boxes are transported in a stacked state, the adhesive tape may be peeled off due to vibration or friction, and the sealed state of the corrugated cardboard boxes may not be maintained.

In order to solve the above problems, the present invention provides a packaging box capable of appropriately maintaining a sealed state while ensuring the ease of peeling off the adhesive tape.

In order to achieve the above object, the packaging box of the present invention is formed in a tubular shape and is connected to a peripheral wall having an opening on an end face and an end portion of the peripheral wall facing the opening via a folding curve. A pair of flaps that close the opening in a folded state, and an adhesive tape that is formed on the side surface of the peripheral wall and closes the opening to fix the pair of flaps to the peripheral wall. The sticking portion is provided with a sticking portion to which the end portion of the adhesive tape is attached, and the pasting portion is formed corresponding to at least one of the vicinity of the leading edge of the adhesive tape and the vicinity of the base end of the adhesive tape near the flap. A peeling portion containing a coating film having a function of weakening the adhesive force of the adhesive tape and a region other than the peeling portion in the entire region of the sticking portion are formed so that the coating film is not formed. Includes an adhesive part that is present.

In this case, the peeling portion includes a tip peeling portion formed in the vicinity of the leading edge of the adhesive tape and a group formed in the vicinity of the base end of the adhesive tape in the vicinity of the flap. It is preferable that the adhesive portion includes an end peeling portion and an intermediate adhesive portion formed between the tip peeling portion and the base end peeling portion.

In this case, it is preferable that the boundary line between the tip peeling portion and the intermediate adhesive portion is inclined toward the tip side of the adhesive tape from both sides in the width direction of the adhesive tape toward the center.

In this case, the peeling portion is a pair of intermediates having the coating film connected to the tip peeling portion and the base end peeling portion at positions corresponding to both sides in the width direction of the adhesive tape with the intermediate adhesive portion sandwiched therein. It is preferable that the peeled portion is further included.

In this case, the peripheral wall has a pair of the openings on both upper and lower end surfaces, two sets of the pair of flaps are provided so as to close the pair of openings, and the sticking portions are provided on the upper and lower sides of the side surface. It is preferable that two sets are provided at both ends, and the adhesive portion of the lower sticking portion is formed larger than the adhesive portion of the upper sticking portion.

In this case, the area of the adhesive portion is preferably set to 3% or more and 30% or less of the total area of the sticking portion.

According to the present invention, the sealed state of the packaging box can be appropriately maintained while ensuring the ease of peeling off the adhesive tape.

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 perspective view which shows the assembly process of the packaging box which concerns on 1st Embodiment of this invention. It is sectional drawing explaining the case where the packaging box which concerns on 1st Embodiment of this invention is opened by 1st method. It is sectional drawing explaining the case where the packaging box which concerns on 1st Embodiment of this invention is opened by 2nd method. It is a side view which shows the sticking part of the packaging box which concerns on 2nd Embodiment of this invention. It is a side view which shows the sticking part of the packaging box which concerns on the modification of 2nd Embodiment of this invention. It is a side view which shows the sticking part of the packaging box which concerns on other modification of 2nd Embodiment of this invention. It is a side view which shows the sticking part of the packaging box which concerns on 3rd Embodiment of this invention. It is a side view which shows the sticking part which concerns on 1st to 3rd Embodiment of this invention and the sticking part which concerns on a comparative example, and is the table which shows the result of the evaluation test. It is a side view which shows the sticking part of the packaging box which concerns on 4th Embodiment of this invention. It is a side view which shows the sticking part of the packaging box which concerns on the modification of 4th Embodiment of this invention. It is a side view which shows the sticking part of the packaging box which concerns on other modification of 4th Embodiment of this invention. It is a side view which shows the sticking part of the packaging box which concerns on other modification of 4th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In each figure, "Fr" indicates "front", "Rr" indicates "rear", "L" indicates "left", "R" indicates "right", and "U" indicates "right". "Upper" indicates "upper" and "D" indicates "lower". In addition, although terms indicating directions and positions are used in the present specification, these terms are used for convenience of explanation and do not limit the technical scope of the present invention. In addition, each figure is not always accurate, and schematically shows the approximate shape of the packaging box or the like according to the embodiment of the present invention.

[Outline of packaging box]
The configuration of the packaging box 1 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 5 of the packaging box 1.

As shown in FIG. 1, the packaging box 1 is formed in a substantially rectangular parallelepiped shape. The packaging box 1 is a type A box in which the upper surface and the lower surface of a substantially square tubular peripheral wall 1W are closed and sealed. A predetermined product (not shown) is housed inside the packaging box 1.

The packaging box 1 is formed by assembling the blank 5 shown in FIG. The blank 5 is formed by punching a sheet of paper corrugated cardboard sheet with a die or the like. The corrugated cardboard sheet is, for example, a double-sided corrugated cardboard sheet in which a front liner 9B and a back liner 9C are bonded to both sides of a corrugated cardboard 9A. Note that FIG. 2 mainly 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 (middle shin 9A) is referred to as the "flow direction". “X” shown in the drawing indicates “step direction”, and “Y” indicates “flow direction”.

[blank]
As shown in FIG. 2, the blank 5 includes a pair of side walls 10, a pair of end walls 11, a joint piece 12, a pair of upper inner flaps 13, a pair of upper outer flaps 14, and a pair of lower inner flaps. It includes a flap 15 and a pair of lower outer flaps 16.

The pair of side walls 10 and the pair of end walls 11 are alternately arranged in a row in the flow direction and are connected to each other via a vertical ruled line L1. The end wall 11 and the side wall 10 are each formed in a substantially rectangular shape having substantially the same dimensions in the step direction. The end wall 11 is formed to be narrower in the flow direction than the side wall 10. The joint piece 12 is provided in a state of being connected to the other end of the side wall 10 in the flow direction via the vertical ruled line L1.

The upper inner flap 13 is provided in a state of being connected to one end (upper end) in the step direction of the end wall 11 via the horizontal ruled line L2. The upper inner flap 13 is formed in a substantially rectangular shape. The dimension in the step direction (extension dimension) of the upper inner flap 13 is set to be approximately half of the dimension in the flow direction of the end wall 11, and the dimension in the flow direction of the upper inner flap 13 is approximately the dimension in the flow direction of the end wall 11. It is set to be the same.

The upper outer flap 14 is provided in a state of being connected to one end (upper end) in the step direction of the side wall 10 via a horizontal ruled line L2 (folded curve). The upper outer flap 14 is formed in a substantially rectangular shape. The dimension in the step direction (extension dimension) of the upper outer flap 14 is set to be substantially the same as the extension dimension of the upper inner flap 13, and the dimension in the flow direction of the upper outer flap 14 is substantially the same as the dimension in the flow direction of the side wall 10. Is set to.

The lower inner flap 15 is provided in a state of being connected to the other end portion (lower end portion) of the end wall 11 in the step direction via the horizontal ruled line L2. The lower outer flap 16 is provided so as to be connected to the other end (lower end) of the side wall 10 in the step direction via the horizontal ruled line L2. The lower inner flap 15 is formed in substantially the same shape as the upper inner flap 13, and the lower outer flap 16 is formed in substantially the same shape as the upper outer flap 14.

The vertical ruled line L1 and the horizontal ruled line L2 are general-purpose ruled lines pushed in from the back liner 9C side of the corrugated cardboard sheet, respectively. Although the details will be described later, when the pair of end walls 11 and the pair of side walls 10 are bent at a substantially right angle along the vertical ruled line L1, a substantially square tubular peripheral wall 1W is formed (see FIG. 1). The peripheral wall 1W has a pair of upper openings 1U on the upper end surface and a lower opening 1D on the lower end surface (see FIG. 3).

<Attachment part>
As shown in FIG. 2, a pair of sticking portions 20 are formed on the outer surface (side surface of the peripheral wall 1W) of the pair of end walls 11. The ends of the adhesive tape T for fixing the pair of upper outer flaps 14 that closed the upper opening 1U to the peripheral wall 1W are attached to the pair of attachment portions 20, respectively (see FIG. 1). Since the pair of sticking portions 20 have substantially the same shape, one sticking portion 20 will be described below.

The sticking portion 20 is formed in a substantially square shape on one side (upper part) of the end wall 11 in the step direction and near the center in the flow direction. The sticking portion 20 is formed larger (wider) than the end portion of the adhesive tape T to be stuck here. The dimension of the sticking portion 20 in the flow direction is set wider (longer) than the width (40 to 50 mm) of the adhesive tape T, and the dimension of the sticking portion 20 in the step direction is set longer than the length of the end portion of the adhesive tape T. ing. Specifically, the sticking portion 20 is in a range of about 70 mm from the vicinity of the boundary (horizontal ruled line L2) with the upper inner flap 13 toward the other (downward) in the step direction, and in a range of about 35 mm on both sides from the center of the flow direction. It is formed. The sticking portion 20 is formed at a position deviated from the boundary (horizontal ruled line L2) with the upper inner flap 13 in the other (lower) direction in the step direction by about several mm to a dozen mm.

The sticking portion 20 includes a peeling portion 30 and an adhesive portion 40. The peeling portion 30 includes a coating film having a function of weakening the adhesive force of the adhesive tape T. The adhesive portion 40 is a portion of the entire region of the sticking portion 20 that is formed in a region other than the peeling portion 30 and in which the coating film is not formed (excluded).

The peeling portion 30 includes a tip peeling portion 30A and a base end peeling portion 30B. The tip peeling portion 30A and the base end peeling portion 30B are, for example, a coating film formed by applying (coating) a liquid mold release agent (paint) containing a silicone resin as a main component on the outer surface of the end wall 11. be. The mold release agent for forming the coating film is not limited to the silicone resin-based mold release agent, and for example, a fluororesin-based mold release agent or the like can be used. That is, another mold release agent (paint) capable of appropriately weakening the adhesive force of the adhesive tape T can be appropriately selected and used.

The tip peeling portion 30A is formed on one side (upper side) of the end wall 11 in the step direction with respect to the center in the step direction. The base end peeling portion 30B is formed at a position separated from the tip peeling portion 30A in one step direction (upward) and slightly deviated from the horizontal ruled line L2 in the step direction other side (downward). The tip peeling portion 30A and the proximal peeling portion 30B are formed in a substantially rectangular shape long in the flow direction. The tip peeling portion 30A and the proximal peeling portion 30B are formed to have substantially the same dimensions. In the first embodiment, the coating film is formed in the entire region of the tip peeling portion 30A and the entire region of the proximal peeling portion 30B. In the drawings, for convenience of explanation, the portion where the coating film is formed (the portion coated with the release agent) is indicated by hatching, and the range of the attachment portion 20 is indicated by a broken line.

The adhesive portion 40 is composed of an intermediate adhesive portion 40A formed between the tip peeling portion 30A and the proximal end peeling portion 30B. Since no coating film is formed on the intermediate adhesive portion 40A, the intermediate adhesive portion 40A is a region where the front liner 9B is exposed between the tip peeling portion 30A and the proximal end peeling portion 30B. Therefore, the adhesive tape T is attached to the intermediate adhesive portion 40A by a normal adhesive force. The intermediate adhesive portion 40A is formed in a substantially rectangular shape having substantially the same dimensions in the flow direction as the tip peeling portion 30A and the like. The dimension of the intermediate adhesive portion 40A in the step direction is set shorter than the dimension of the tip peeling portion 30A and the like in the step direction. The area of the intermediate adhesive portion 40A is set to about 15% of the total area of the sticking portion 20. The "normal adhesive strength" means the adhesive strength when the adhesive tape T is attached to a normal corrugated cardboard sheet or the like that is not coated or the like.

By the way, the corrugated cardboard sheet is manufactured by executing a laminating step of corrugated cardboard base paper using a device called a corrugated board (not shown). The corrugator attaches the liners 9B and 9C to both sides of the inner shin 9A while advancing the middle shin 9A in the flow direction. Further, the corrugator forms a horizontal ruled line L2 extending in the flow direction, and cuts a corrugated cardboard sheet continuous in the flow direction to a predetermined length.

Further, the blank 5 (packaging box 1) described above is manufactured by an apparatus called a flexo folder gluer (not shown). Flexo folder gluer (hereinafter, also referred to as "FFG") is used for printing on corrugated cardboard sheets using flexo ink, etc. It is a device that continuously performs joining and the like using an adhesive. Further, the FFG prints (coats) the tip peeling portion 30A and the base end peeling portion 30B (peeling portion 30) on each end wall 11 using a mold release agent (paint). The release agent is not applied to the intermediate adhesive portion 40A (adhesive portion 40). Further, the FFG forms the upper flaps 13, 14 and the lower flaps 15, 16 and the like, and also forms the vertical ruled line L1 and the like extending in the step direction. Further, in the FFG, the side wall 10 and the end wall 11 are bent along the vertical ruled line L1, and the joint piece 12 is adhered to the inner surface of the opposite end wall 11 with an adhesive, and the packaging box 1 in a folded state is formed. To manufacture. As the adhesive, for example, a hot melt adhesive, a synthetic resin emulsion adhesive, a double-sided tape, or the like can be used.

[Assembly of packaging box]
Next, a step (assembly work) of assembling the packaging box 1 for accommodating the goods will be described with reference to FIGS. 1 and 3. FIG. 3 is a perspective view showing an assembly process of the packaging box 1. The packaging box 1 may be manually assembled by an operator, or may be automatically or semi-automatically assembled by a box making machine. Here, as an example, a case where an operator assembles the packaging box 1 will be described.

First, the operator bends the pair of end walls 11 and the pair of side walls 10 at substantially right angles along the vertical ruled line L1. Then, as shown in FIG. 3, the pair of side walls 10 face each other in the front-rear direction, the pair of end walls 11 face each other in the left-right direction, and the substantially square tubular peripheral wall 1W having openings 1U and 1D on both upper and lower end surfaces. Is formed. Further, the pair of upper inner flaps 13 and the pair of upper outer flaps 14 are connected to the ends of the peripheral walls 1W facing each other with the upper opening 1U interposed therebetween via a horizontal ruled line L2. Further, the pair of lower inner flaps 15 and the pair of lower outer flaps 16 are connected to the ends of the peripheral walls 1W facing each other with the lower opening 1D interposed therebetween via a horizontal ruled line L2.

Next, the operator bends the lower inner flap 15 inward along the horizontal ruled line L2, and then bends the lower outer flap 16 inward along the horizontal ruled line L2. The pair of lower outer flaps 16 are stacked under the pair of lower inner flaps 15, and their tips are abutted at substantially the center in the front-rear direction to close the lower opening 1D. The operator attaches the adhesive tape T along the abutting portion of the pair of lower outer flaps 16. The adhesive tape T is bent upward at both ends in the left-right direction of the abutting portion and is attached to the outer surfaces of the pair of end walls 11. As described above, the pair of lower outer flaps 16 are fixed to the side surface of the peripheral wall 1W via the adhesive tape T, and the bottom surface of the packaging box 1 is formed.

Next, the worker puts the product into the packaging box 1 through the upper opening of the peripheral wall 1W. Subsequently, the operator bends the upper inner flap 13 inward along the horizontal ruled line L2, and then bends the upper outer flap 14 inward along the horizontal ruled line L2. The pair of upper outer flaps 14 are superposed on the pair of upper inner flaps 13, and their tips are abutted at substantially the center in the front-rear direction to close the upper opening 1U. As shown in FIG. 1, the operator attaches the adhesive tape T along the abutting portion of the pair of upper and outer flaps 14. The adhesive tape T is bent downward at both ends in the left-right direction of the abutting portion, and is attached to the attachment portion 20 of the pair of end walls 11. As described above, the pair of upper and outer flaps 14 are fixed to the side surface of the peripheral wall 1W via the adhesive tape T, and the top surface of the packaging box 1 is formed.

In this state, a pair of outer flaps 14 and 16 provided on the upper and lower sides close the pair of upper and lower openings 1U and 1D. The ends of the adhesive tape T attached to the pair of upper and outer flaps 14 are attached over the base end peeling portion 30B, the intermediate adhesive portion 40A, and the tip peeling portion 30A (see FIG. 1). That is, the tip peeling portion 30A is formed corresponding to the vicinity of the leading edge of the adhesive tape T. The base end peeling portion 30B is formed corresponding to the vicinity of the base end of the adhesive tape T, which is in the vicinity of the upper outer flap 14. The end portion of the adhesive tape T is attached to the base end peeling portion 30B and the tip peeling portion 30A with a weaker adhesive force than usual, and is attached to the intermediate adhesive portion 40A with a normal adhesive force. The vicinity of the leading edge of the adhesive tape T means the tip side (lower side) of the adhesive tape T attached to the adhesive tape T with respect to the center in the length direction, and the vicinity of the base end of the adhesive tape T is attached. It means the base end side of the adhesive tape T attached to the portion 20 with respect to the center in the length direction (upper side (excluding a portion deviated from the horizontal ruled line L2 by about several mm to a dozen mm)).

As a result, the assembly work of the packaging box 1 is completed, and the packaging box 1 is in a sealed state (see FIG. 1).

[Opening the packaging box]
Next, the opening operation of the packaging box 1 will be described with reference to FIGS. 4 and 5. FIG. 4 is a cross-sectional view illustrating a case where the packaging box 1 is opened by the first method. FIG. 5 is a cross-sectional view illustrating a case where the packaging box 1 is opened by the second method. In addition, in order to simplify the explanation, the work of peeling off the adhesive tape T attached to one sticking portion 20 will be mainly described.

The sealed packaging box 1 is opened by, for example, peeling off the adhesive tape T attached to the top surface and opening a pair of upper and outer flaps 14 and the like (see FIG. 3). Here, there are two ways for the user to start the work of peeling off the adhesive tape T (first method and second method).

As shown in FIG. 4, as a first method, the user rolls up the cutting edge portion of the adhesive tape T (see the solid line arrow in FIG. 4) to create a clue for gripping the adhesive tape T. Since the cutting edge portion of the adhesive tape T is attached to the tip peeling portion 30A of the sticking portion 20 with a weak adhesive force, the user can easily roll up (peel off) the cutting edge portion of the adhesive tape T. The user grasps the most advanced portion of the rolled-up adhesive tape T and pulls the adhesive tape T upward (see the two-dot chain arrow in FIG. 4). Since the end portion of the adhesive tape T attached to the sticking portion 20 is attached with a weak adhesive force except for the intermediate adhesive portion 40A, the user can peel off the end portion of the adhesive tape T from the sticking portion 20 with a small force. be able to.

Next, as shown in FIG. 5, as a second method, the user pushes the vicinity of the adhesive tape T at the upper part of the end wall 11 (see the solid line arrow in FIG. 5), and the adhesive tape T and the sticking portion 20 (end). Make a gap with the wall 11). At this time, the upper inner flap 13 and the like also slide in the pushed-in direction. The user inserts a finger into the gap and pulls it toward you (see the alternate long and short dash arrow in FIG. 5). Then, since the adhesive tape T on the upper outer flap 14 (horizontal ruled line L2) side is attached to the base end peeling portion 30B of the affixing portion 20 with a weak adhesive force, the user can use the adhesive tape T affixed to the affixing portion 20. The root can be easily peeled off. Since the end of the adhesive tape T attached to the attachment portion 20 is attached with a weak adhesive force except for the intermediate adhesive portion 40A, the user can apply the adhesive tape T from the root to the most advanced side with a small force. It can be peeled off.

The user peels off the end portion of the adhesive tape T from the sticking portion 20 by the first method or the second method, then grasps the peeled adhesive tape T, and pulls the adhesive tape T from the pair of upper and outer flaps 14. Peel off. The packaging box 1 is opened by peeling the adhesive tape T from the pair of end walls 11 and the pair of upper and outer flaps 14 (see FIG. 3).

In the packaging box 1 according to the first embodiment described above, a coating film that weakens the adhesive force of the adhesive tape T is formed on a part of the sticking portion 20, and the end portion of the adhesive tape T is stuck on the sticking portion 20. rice field. Specifically, the coating film was formed in a region corresponding to the most advanced portion and the root portion (upper portion) of the end portion of the adhesive tape T attached to the attachment portion 20. According to this configuration, the cutting edge portion of the adhesive tape T can be easily peeled off from the sticking portion 20. In addition, the base portion of the adhesive tape T can be easily peeled off from the sticking portion 20 by pushing the vicinity of the upper portion of the sticking portion 20. As a result, a portion (clue) to be gripped by the user when the adhesive tape T is peeled off can be easily created, and the packaging box 1 can be easily opened. Further, in this packaging box 1, the coating film is omitted from the upper outer flap 14 and the intermediate adhesive portion 40A of the sticking portion 20. According to this configuration, the adhesive tape T can be attached to the upper outer flap 14 and the intermediate adhesive portion 40A with normal adhesive force. As a result, it is possible to prevent the adhesive tape T from being unintentionally peeled off due to vibration, friction, or the like, as compared with the case where the coating film is formed on all the portions to which the adhesive tape T should be attached. As described above, the sealed state of the packaging box 1 can be appropriately maintained while ensuring the ease of peeling off the adhesive tape T.

Further, in the packaging box 1 according to the first embodiment, the area of the intermediate adhesive portion 40A is set to about 15% when the total area of the sticking portion 20 is 100%. According to this configuration, it is possible to prevent the adhesive tape T from being easily peeled off more than necessary.

[Second Embodiment]
Next, the sticking portion 21 of the packaging box 1 according to the second embodiment will be described with reference to FIG.
FIG. 6 is a side view showing the sticking portion 21 of the packaging box 1. In the description of other embodiments and modifications described below, the same or corresponding configurations as those of the sticking portion 20 of the packaging box 1 according to the first embodiment are designated by the same reference numerals and the same as or similar to the sticking portion 20. The corresponding description is omitted. Further, although a pair of sticking portions 21 are formed in the packaging box 1 according to the second embodiment, one sticking portion 21 will be described in the same manner as in the description of the first embodiment.

The peeling portion 31 of the sticking portion 21 includes a tip peeling portion 31A and a base end peeling portion 30B, and the adhesive portion 41 of the sticking portion 21 includes an intermediate adhesive portion 41A. The tip peeling portion 31A has a substantially V-shaped recess in the upper portion thereof. Specifically, the upper side of the tip peeling portion 31A is formed in a substantially V shape so as to be inclined downward from both ends in the front-rear direction (width direction) toward the center. As a result, the intermediate adhesive portion 41A is formed in a substantially inverted triangular shape (to be exact, a substantially pentagonal shape) between the tip peeling portion 31A and the base end peeling portion 30B.

In the packaging box 1 (attached portion 21) according to the second embodiment described above, the boundary line between the tip peeling portion 31A and the intermediate adhesive portion 41A is the adhesive tape T from both sides in the width direction toward the center. It was tilted toward the tip. That is, the intermediate adhesive portion 41A is formed in a substantially V shape that is convex from the upstream side to the downstream side in the direction in which the adhesive tape T is peeled off. According to this configuration, the adhesive tape T starts to peel off from the vicinity of the V-shaped tip of the intermediate adhesive portion 41A, so that the force required to start the peeling work can be reduced. Further, as the peeling of the adhesive tape T progresses, the boundary line between the adhesive tape T and the intermediate adhesive portion 41A gradually widens, but the area of the peeled adhesive tape T increases, so that the user adheres. The tape T can be firmly gripped and peeled off. As a result, the force in the peeling direction can be effectively transmitted to the adhesive tape T, and the adhesive tape T can be appropriately peeled off without being damaged.

In the sticking portion 21 of the packaging box 1 according to the second embodiment, the intermediate adhesive portion 41A is formed in a substantially inverted triangular shape, but the present invention is not limited to this. As a modification of the sticking portion 21, for example, as shown in FIG. 7, a substantially V-shaped convex portion may be formed in the lower portion of the base end peeling portion 31B. As a result, the intermediate adhesive portion 41A may be formed in a substantially V shape between the tip peeling portion 31A and the base end peeling portion 31B.

Further, in the sticking portion 21 of the packaging box 1 according to the second embodiment, the tip peeling portion 31A is formed at a position where both ends in the width direction are separated downward from both ends in the width direction of the base end peeling portion 30B. However, the present invention is not limited to this. For example, as shown in FIG. 8, the tip peeling portion 31A may be formed at a position where both ends in the width direction are in contact with both ends in the width direction of the base end peeling portion 30B.

[Third Embodiment]
Next, with reference to FIG. 9, the sticking portion 22 of the packaging box 1 according to the third embodiment will be described.
FIG. 9 is a side view showing the sticking portion 22 of the packaging box 1. Although a pair of sticking portions 22 are formed in the packaging box 1 according to the third embodiment, one sticking portion 22 will be described in the same manner as in the description of the first embodiment.

The peeling portion 32 of the sticking portion 22 includes a tip peeling portion 30A, a base end peeling portion 30B, and a pair of intermediate peeling portions 32C. The adhesive portion 42 of the sticking portion 22 includes an intermediate adhesive portion 42A surrounded by the peeling portion 32. The pair of intermediate peeling portions 32C has a coating film that is connected to the tip peeling portion 30A and the proximal end peeling portion 30B at positions corresponding to both sides of the adhesive tape T in the width direction with the intermediate adhesive portion 42A interposed therebetween. Each of the pair of intermediate peeling portions 32C is formed in a substantially rectangular shape, and is erected between the tip peeling portion 30A and the proximal end peeling portion 30B. That is, the tip peeling portion 30A, the base end peeling portion 30B, and the pair of intermediate peeling portions 32C integrally form a substantially rectangular annular coating film. The intermediate adhesive portion 42A is formed in a substantially rectangular shape surrounded by a substantially rectangular annular coating film (each peeling portion 30A, 30B, 32C).

According to the packaging box 1 (attachment portion 22) according to the third embodiment described above, since a substantially rectangular annular coating film is formed around the intermediate adhesive portion 42A, the adhesive tape attached to the attachment portion 22. The adhesive strength can be weakened over substantially the entire circumference of T. As a result, the user can more easily create a clue (trigger) for peeling off the adhesive tape T.

In the sticking portion 22 of the packaging box 1 according to the third embodiment, the coating film is formed in a substantially rectangular annular shape, and the intermediate adhesive portion 42A is formed in a substantially rectangular shape, but the present invention is not limited to this. For example, the intermediate adhesive portion 42A may be formed in a substantially circular shape by forming the inside of the annular coating film in a substantially circular shape (including an elliptical shape, a drop shape, etc., the same applies hereinafter) (not shown). ).

Further, the characteristics of the sticking portion 21 of the packaging box 1 according to the second embodiment may be applied to the sticking portion 22 of the packaging box 1 according to the third embodiment. That is, the intermediate adhesive portion 42A may be formed in a substantially inverted triangle shape or a substantially V shape.

The sticking portions 20 to 22 of the packaging box 1 according to the first to third embodiments are formed on the upper part of the end wall 11 for sticking the adhesive tape T for fixing the pair of upper and outer flaps 14 to the peripheral wall 1W. However, the present invention is not limited to this. For example, the sticking portions 20 to 22 may be formed at the lower part of the end wall 11 for sticking the adhesive tape T for fixing the pair of lower outer flaps 16 to the peripheral wall 1W, or the upper part and the lower part of the end wall 11. It may be formed on both (not shown).

[Evaluation test]
Here, with reference to FIG. 10, an evaluation test for evaluating the sticking portions 20 to 22 of the packaging box 1 according to the first to third embodiments and the sticking portions 100 according to the comparative example will be described. .. FIG. 10 is a side view showing the pasting portions 20 to 22 according to the first to third embodiments and the pasting portions 100 according to the comparative example, and a table showing the results of the evaluation test.

First, the sticking portion 100 according to the comparative example will be briefly described. As shown in the uppermost part of FIG. 10, the sticking portion 100 according to the comparative example is obtained by omitting the adhesive portion 42 (intermediate adhesive portion 42A) from the sticking portion 22 according to the third embodiment, and covers the entire area thereof. A substantially square (about 70 mm square) coating film is formed.

Next, an evaluation test for evaluating the sticking portions 20 to 22 and the sticking portion 100 will be described. The evaluation test includes a transportation test, an opening test by a first method, and an opening test by a second method. In the transportation test, the sealed packaging box 1 was stacked on a pallet in 4 rows and 2 layers, wrapped with a stretch film and fixed, and then transported by a vehicle loaded with the pallet for about 560 km (for example, between Tokyo and Osaka). This is a test for confirming the degree of peeling of the adhesive tape T. The opening test by the first method is a sensory test for evaluating the ease of peeling off the adhesive tape T by the first method. The opening test by the second method is a sensory test for evaluating the ease of peeling off the adhesive tape T by the second method.

Next, the evaluation criteria of the evaluation test will be described. In the transportation test, if the adhesive tape T is not peeled off in any of the packaging boxes 1 after transportation, it is evaluated as "○", and the adhesive tape T in any of the packaging boxes 1 is partially peeled off. In this case, it was evaluated as “Δ”, and when the adhesive tape T of any of the packaging boxes 1 was completely peeled off, it was evaluated as “x”. In the opening test by the first method, when a person tries to peel off the adhesive tape T by the first method and feels that it is very easy to peel off, it is evaluated as "◎", and when it feels that it is easy to peel off, it is evaluated as "○". When it felt that it was a little easy to peel off, it was evaluated as "Δ", and when it felt that it was about the same as when there was no coating film (difficult to peel off), it was evaluated as "x". In the opening test by the second method, when a person tries to peel off the adhesive tape T by the second method and feels that it is very easy to peel off, it is evaluated as "◎", and when it feels that it is easy to peel off, it is evaluated as "○". When it felt that it was a little easy to peel off, it was evaluated as "Δ", and when it felt that it was about the same as when there was no coating film (difficult to peel off), it was evaluated as "x".

As shown in the uppermost part of FIG. 10, in the sticking portion 100 according to the comparative example, the evaluation result of the transportation test was “x”, and the opening test by the first and second methods was “⊚”.

On the other hand, as shown in the second to fourth rows from the top of FIG. 10, in the pasting portions 20 to 22 according to the first to third embodiments, the evaluation results of the transportation test were all "○". .. Further, in the sticking part 20 according to the first embodiment, the opening test by the first method is "○", and in the sticking parts 21 and 22 according to the second and third embodiments, the opening test by the first method is performed. It became "◎". Further, in the pasting portions 20 and 21 according to the first and second embodiments, the opening test by the second method is "○", and in the pasting portions 22 according to the third embodiment, the opening test by the second method is performed. It became "◎".

As described above, the sticking portion 100 according to the comparative example can ensure the ease of peeling off the adhesive tape T, but the evaluation result shows that the sealed state of the box cannot be maintained. On the other hand, the evaluation results show that the sticking portions 20 to 22 according to the first to third embodiments can maintain the sealed state of the packaging box 1 while ensuring the ease of peeling.

[Fourth Embodiment]
Next, with reference to FIG. 11, the sticking portion 23 and the like of the packaging box 1 according to the fourth embodiment will be described. FIG. 11 is a side view showing the affixed portions 20 and 23 of the packaging box 1. Although a pair of sticking portions 23 are formed in the packaging box 1 according to the fourth embodiment, one sticking portion 23 will be described in the same manner as in the description of the first embodiment.

In the packaging box 1 according to the fourth embodiment, the sticking portion 20 is formed on the upper portion of each end wall 11, and the sticking portion 23 is formed on the lower portion of each end wall 11.

The peeling portion 33 of the sticking portion 23 includes a tip peeling portion 30A and a base end peeling portion 30B, and the adhesive portion 43 of the sticking portion 23 includes an intermediate adhesive portion 43A. The intermediate adhesive portion 43A of the lower sticking portion 23 is formed larger than the intermediate adhesive portion 40A of the upper sticking portion 20. As a result, the area of the intermediate adhesive portion 43A is set to 15% or more of the total area of the sticking portion 23, and the total area of the lower sticking portion 23 is set to be larger than the total area of the upper sticking portion 20.

In the packaging box 1 according to the fourth embodiment described above, a pair of sticking portions 20 and 23 provided on the upper and lower sides are formed on both upper and lower ends of the pair of end walls 11 (side surfaces of the peripheral wall 1W). .. Further, the area of the lower intermediate adhesive portion 43A was set wider (larger) than the area of the upper intermediate adhesive portion 40A. According to this configuration, the adhesive tape T attached to the lower attachment portion 23 (intermediate adhesive portion 43A) is made more difficult to peel off than the adhesive tape T attached to the upper attachment portion 20 (intermediate adhesive portion 40A). Can be done. As a result, the pair of lower outer flaps 16 that block the lower opening 1D can be maintained in a state of being fixed to the peripheral wall 1W. As a result, it is possible to suppress problems such as bottoming out of the packaging box 1.

In the sticking portion 23 of the packaging box 1 according to the fourth embodiment, the intermediate adhesive portion 43A was enlarged without changing the sizes of the tip peeling portion 30A and the base end peeling portion 30B. Not limited to. For example, the intermediate adhesive portion 43A may be formed larger than the intermediate adhesive portion 40A by making the tip peeling portion 30A and the proximal end peeling portion 30B smaller. Further, the entire sticking portion 23 (tip peeling portion 30A, base end peeling portion 30B, intermediate adhesive portion 43A) may be enlarged. In this case, the area of the intermediate adhesive portion 43A may be set to about 15% of the total area of the sticking portion 23.

Further, the characteristics of the sticking portions 21 and 22 of the packaging box 1 according to the second or third embodiment may be applied to the sticking portion 23 of the packaging box 1 according to the fourth embodiment.

The sticking portions 20 to 23 (hereinafter, referred to as "sticking portion 20 and the like") of the packaging box 1 according to the first to fourth embodiments are displaced downward by several mm to a dozen mm below the horizontal ruled line L2. Although formed at the position, the present invention is not limited to this. For example, the sticking portion 20 or the like may be formed in a state of extending downward (or upward) from the horizontal ruled line L2 without leaving a gap between the sticking portion 20 and the like.

In the sticking portions 20 and the like of the packaging box 1 according to the first to fourth embodiments, the peeling portions 30 to 33 include the tip peeling portions 30A and 31A and the base end peeling portions 30B and 31B. Is not limited to this. The peeling portions 30 to 33 may be formed so as to correspond to at least one of the base end portions of the adhesive tape T near the leading edge of the adhesive tape T and the vicinity of the outer flaps 14 and 16. That is, the sticking portion 20 and the like may include at least one of the tip peeling portions 30A and 31A and the base end peeling portions 30B and 31B. For example, as shown in FIG. 12, the sticking portion 20 may include a tip peeling portion 30A and an adhesive portion 44 formed in a region other than the tip peeling portion 30A in the entire region of the sticking portion 20. .. Similarly, the sticking portion 23 may include a base end peeling portion 30B and an adhesive portion 44 formed in a region other than the base end peeling portion 30B in the entire region of the sticking portion 23. The base end peeling portion 30B may be formed on the sticking portion 20, and the tip peeling portion 30A may be formed on the sticking portion 23 (not shown).

In addition, for example, as shown in FIG. 13, the tip peeling portion 30A and the proximal peeling portion 30B are integrally formed, and the separating adhesive portions 40B and 43B are separated so as to separate these peeling portions 30A and 30B. It may be formed. Further, for example, as shown in FIG. 14, the adhesive portion 40 (43) may be composed of an intermediate adhesive portion 40A (43A) and a separate adhesive portion 40B (43B). That is, the adhesive portion 40 (43) may be formed in a substantially T shape. Further, although not shown, even if the adhesive portion 40 (43) is formed in a substantially cross shape by forming a pair of upper and lower separated adhesive portions 40B (43B) with the intermediate adhesive portion 40A (43A) interposed therebetween. good. The tip peeling portion 30A (31A) is preferably formed at least corresponding to the tip corner portions (both edges in the width direction) of the adhesive tape T. Further, it is preferable that the base end peeling portion 30B (31B) is formed at least corresponding to both edges in the width direction of the adhesive tape T.

The sticking portion 20 and the like of the packaging box 1 according to the first to fourth embodiments (including the above-mentioned modified examples. The same shall apply hereinafter) have a substantially square shape corresponding to the width and end shape of the adhesive tape T. Although formed, the invention is not limited to this. The size (width and length) of the sticking portion 20 and the like may be appropriately changed according to the width and length of the adhesive tape T. Further, for example, the sticking portion 20 or the like may be formed in a rectangular shape long in the vertical direction, or may be formed in a circular shape or a trapezoidal shape (neither is shown).

Further, in the sticking portion 20 and the like of the packaging box 1 according to the first to fourth embodiments, the adhesive portions 40 to 44 are formed so as to have an area of about 15% with respect to the entire sticking portion 20 and the like. However, the present invention is not limited to this. The area of the intermediate adhesive portion 40A or the like may be set to 15% or more of the total area of the sticking portion 20 or the like. However, considering the ease of peeling off the adhesive tape T, the area of the adhesive portion 40 to 44 is preferably set in the range of 3% or more and 30% or less of the total area of the adhesive portion 20 and the like. More preferably, the area of the adhesive portion 40 to 44 may be set in the range of 3% or more and 15% or less of the total area of the sticking portion 20 and the like.

Further, in the packaging box 1 according to the first to fourth embodiments, the pair of upper outer flaps 14 and the pair of lower outer flaps 16 have their tips abutted against each other, but the present invention is limited to this. Not done. For example, one upper outer flap 14 (one lower outer flap 16) may be formed so as to overlap the other upper outer flap 14 (the other lower outer flap 16). In this case, the adhesive tape T is attached along the tip of one of the upper outer flaps 14 (one of the lower outer flaps 16), and the attachment portion 20 and the like are formed in accordance with the end portions.

Further, the packaging box 1 according to the first to fourth embodiments is formed of a double-sided corrugated cardboard sheet made of paper, but the present invention is not limited thereto. For example, the corrugated cardboard sheet may be a single-sided corrugated cardboard sheet in which a liner is attached to one side of the inner shin 9A, or a double-sided corrugated cardboard sheet in which a single-sided corrugated cardboard sheet is attached to a double-sided corrugated cardboard sheet. Further, for example, the packaging box 1 may be formed of thick paper, a resin plate, or the like instead of the corrugated cardboard sheet made of paper.

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 Packaging box 1D Lower opening (opening)
1U Upper opening (opening)
1W peripheral wall 14 upper outer flap (flap)
16 Lower outer flap (flap)
20 to 23 Sticking part 30 to 33 Peeling part 30A, 31A Tip peeling part 30B, 31B Base end peeling part 40 to 44 Adhesive part 40A, 41A, 42A, 43A Intermediate adhesive part 32C Intermediate peeling part L2 Horizontal ruled line (folded curve)
T adhesive tape

Claims (5)

A peripheral wall (1W) formed in a tubular shape and having an opening (1U) on the end face,
A pair of flaps (14) that are connected to the ends of the peripheral walls that face each other across the opening via a folding curve (L2) and close the opening while being bent by the folding curve.
A sticking portion (20 to 23) formed on a side surface of the peripheral wall and to which an end portion of an adhesive tape (T) for fixing the pair of flaps closing the opening to the peripheral wall is attached.
The sticking part is
The adhesive tape the leading edge near the a vicinity of said flap is formed so as to correspond to the near with the base end of the adhesive tape, peeling section that contains a coating film having a function to weaken the adhesive strength of the adhesive tape ( 30-33) and
Wherein is formed in a region other than the peeling portion of the total area of the bonding part, the adhesive portion of the coating film is a non-form and (40-44), only contains,
The peeled part is
Tip peeling portions (30A, 31A) formed corresponding to the vicinity of the leading edge of the adhesive tape,
Includes base end peeling portions (30B, 31B) formed in the vicinity of the base end of the adhesive tape in the vicinity of the flap.
The adhesive portion includes packing box, characterized in that has Nde containing intermediate adhesive portion which is formed (40A, 41A, 42A, 43A ) and between the tip stripping section and the proximal end peeling unit. A claim characterized in that the boundary line between the tip peeling portion (31A) and the intermediate adhesive portion (41A) is inclined toward the tip side of the adhesive tape from both sides in the width direction of the adhesive tape toward the center. Item 1. The packaging box according to item 1. The peeling portion is a pair of intermediates having the coating film connected to the tip peeling portion and the base end peeling portion at positions corresponding to both sides in the width direction of the adhesive tape with the intermediate adhesive portion (42A) interposed therebetween. The packaging box according to claim 1 or 2 , further comprising a peeling portion (32C). The peripheral wall has a pair of openings (1U, 1D) on both upper and lower end surfaces.
Two sets of the pair of flaps (14, 16) are provided so as to close the pair of openings.
Two sets of the sticking portions (20, 23) are provided at the upper and lower ends of the side surface.
The packaging according to any one of claims 1 to 3 , wherein the adhesive portion (43) of the lower sticking portion is formed larger than the adhesive portion (40) of the upper sticking portion. box. The packaging box according to any one of claims 1 to 4 , wherein the area of the adhesive portion is set to be 3% or more and 30% or less of the total area of the sticking portion.

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