JP7267838B2 - packaging box - Google Patents

Description

The present invention relates to packaging boxes.

Patent Document 1 discloses a general-purpose packaging box having a lid portion consisting of four flaps, a pair of side plates, and a pair of end plates, and a pair of top plates, bottom plates, a pair of side plates, and four flaps. A wrap-around packaging box with a lid is disclosed. Each of these is provided with a breaking line extending along the lid (or top plate) on the side plate and the end plate (or lid).

WO2018/235780

In the packaging box of Patent Literature 1, the side plate and the end plate (or the lid) are broken along the breaking lines, respectively, so that the upper part of the packaging box can be separated and the lower part of the packaging box can be opened like a tray. However, since this packaging box cannot be opened by other methods, especially in the case of the latter wrap-around type packaging box, there is a risk that some operators may find it difficult to open.

An object of the present invention is to provide a highly convenient packaging box that can be opened not only in consideration of workability for opening, but also by a widely known method.

One aspect of the present invention is a top plate, and a top plate connected to the top plate via a first bent portion, and bent with respect to the top plate in a direction that intersects the direction in which the first bent portion extends. a side plate, and a pair of inner plates that are connected to both ends of the side plate in the direction in which the first bent portion extends through second bent portions, respectively, and are bent with respect to the side plates in the same direction as the top plate. The flaps are connected to both ends of the top plate in the direction in which the first bent portion extends through third bent portions, respectively, and are bent with respect to the top plate so as to overlap the outer side of the inner flap. a pair of outer flaps, an operation portion provided on the side plate, and a pair of first breaking lines provided on both sides of the operation portion of the side plate so as to extend along the first bent portion; a pair of second breaking lines respectively provided in the pair of inner flaps so as to extend along the third bent portion; A third breaking line provided between the first bending portions, a pair of auxiliary bending lines provided on the side plate so as to be positioned on both sides of the third breaking line , the inner flap and the outer flap and the outer flap is provided with a cutting line located on the side opposite to the side plate with respect to the attached portion and extending along the second bent portion. The cutting line is linear and has a first end located on or near the third bent portion and a second end located a first distance from the tip of the outer flap. Provide a packaging box. In addition, the pair of first breaking lines each have an end portion positioned at a second distance from the second bending portion, and the pair of second breaking lines are arranged at the second bending portion. each having a third spaced end with respect to the portion.

Since this packaging box includes the first breaking line and the third breaking line provided on the side plate and the second breaking line provided on the inner flap, the first opening is divided into the top plate side and the bottom plate side. In addition to the method of (1), opening is possible by a second widely known method of opening with a tear band. In other words, the operator can select the first method considering unsealing workability and the widely known second method, whichever is easier to unseal. Therefore, the convenience can be improved, and the operator does not feel that the unsealability is poor.

When opening by the first method, the side plate is broken along the first breaking line and the inner flap is broken along the second breaking line. Either the breaking along the first breaking line or the breaking along the second breaking line may be performed first. As a result, the first unsealed state in which the packaging box is divided into the top plate side and the bottom plate side can be obtained. When breaking the side plate along the first breaking line, it is possible to transmit the operating force to the first breaking line by bending along the auxiliary bending lines on both sides of the third breaking line. It is possible to reliably break along the first breaking line while suppressing breakage along the first breaking line.

When the package is opened by the second method, tear strips are formed between the first breaking line and the first bent portion and between the second breaking line and the third bent portion. Specifically, the side plate is broken along the third breaking line, and the side plate is broken along the first breaking line and the first bent portion by holding the edge and operating it toward the inner flap, Subsequently, the inner flap and the outer flap are broken along the second breaking line and the third bent portion. As a result, the second unsealed state in which part of the side plate, part of the inner flap, the outer flap, and the top plate are individually separated can be achieved.

Moreover, the outer flap is provided with a cutting line located on the side opposite to the side plate with respect to the adhered portion and extending along the second bent portion. It has a linear shape having a first end located in the vicinity thereof and a second end located at a first distance from the tip of the outer flap. Therefore, it is possible to prevent the tear band from breaking due to excessive lengthening of the tear band, thereby improving the opening workability of the second method.

The third breaking line is linear and has a first end located on the operating portion and a second end located on or near the first bent portion. is provided with a first cut line extending from the second end of the third break line toward the second bent portion. According to this aspect, since the first cut line serves as a starting point when breaking along the first bent portion, the opening workability by the second method can be improved.

The third break line has a first portion having a first end located on the operating portion, a second end spaced apart from the first bent portion at a fourth distance, and the second end. and the first bent portion, and a pair of second portions inclined in directions away from each other from the second end toward the first bent portion. According to this aspect, when opening by the second method, by breaking the first portion of the third breaking line and holding the edge and operating it toward the inner flap, the first breaking line and the third breaking line are opened. Then, the side plate is broken along the first breaking line and the first bent portion. That is, when starting to open the package, only the first portion of the third break line needs to be broken, so that workability can be improved especially when the side plate (packaging box) is high.

The third bent portion is provided with a second cut line extending from the end where the side plate is located or the vicinity thereof toward the center of the third bent portion. According to this aspect, when unsealing by the second method, after breaking along the first breaking line and the first bending portion, subsequently breaking along the second breaking line and the third bending portion, Since the two cut lines serve as starting points, the opening workability of the second method can be improved.

The second bending portion has a third bending portion positioned between an end portion of the first breaking line on the second bending portion side and an end portion of the second breaking line on the second bending portion side. A cut line is provided. According to this aspect, when the side plate is operated by holding the operation portion before the outer flap, the break along the first break line stops when it reaches the third cut line, and continues to the second bent portion. break along the line. When the outer flap is operated before the operating part, the breaking along the second breaking line stops when reaching the third cut line, and then changes to breaking along the second bent part. In other words, breaking in the lateral direction along the first breaking line or the second breaking line is switched to breaking along the second bent portion starting from the third cut line. Therefore, the unsealing workability by the first method can be improved.

In the present invention, of the first method in which the top plate side and the bottom plate side are divided and opened in consideration of the opening workability, and the widely known second method in which the top plate side is opened with a tear strip, Since the worker can select the one that is easier to open, convenience for the worker can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the packaging box which concerns on 1st Embodiment of this invention. The top view which shows the blank of the packaging box of FIG. 3 is a plan view of a portion of the blank of FIG. 2; FIG. Fig. 4 is a perspective view showing a first opening stage according to the first method; The perspective view which shows the unsealing state by the 1st method. Fig. 3 is a perspective view showing the first opening stage according to the second method; Fig. 3 is a perspective view showing a second unsealing stage according to the second method; The perspective view which shows the unsealing state by the 2nd method. The perspective view of the packaging box which concerns on 2nd Embodiment. The top view which shows a part of blank of the packaging box of FIG. The perspective view of the packaging box which concerns on 3rd Embodiment. The top view which shows the blank of the packaging box of FIG. FIG. 13 is a plan view of a portion of the blank of FIG. 12; The perspective view which shows the opening state by the side of a top plate by a 1st method. The perspective view which shows the opening state by the side of a top plate by a 2nd method.

Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 shows a packaging box 10 according to a first embodiment of the invention. The packaging box 10 is a wrap-around case including a square cylindrical outer wall 15 and a pair of lid walls 25 closing openings at both ends of the outer wall 15 . The outer peripheral wall 15 has a top plate 16, a bottom plate 17, and a pair of side plates 18, and each lid wall 25 has a pair of inner flaps 26 and a pair of outer flaps 27A, 27B. In order to enable the first opening method shown in FIGS. 4 and 5 and the second opening method shown in FIGS. , 48 and three score lines 44, 50, 52 are provided.

The packaging box 10 is formed by folding and fixing one blank shown in FIG. 2 at a predetermined portion. The blanks are formed by punching paper corrugated sheets with a known carton punching machine. The corrugated cardboard sheet has a structure in which a corrugated core is provided between a front liner and a back liner. The dashed-dotted line in FIG. 2 is a general-purpose ruled line formed by ruling from the back liner so as to reduce the thickness. A two-dot chain line in FIG. 2 is a reverse crease formed by crease from the front liner so as to reduce the thickness. The solid lines in FIG. 2 are cutting lines formed by inserting a blade from the back liner to the front liner, and shape lines (edges) by punching.

In the following description, the longitudinal direction of the packaging box 10, in which the pair of lid walls 25 face each other, is called the X direction, and the lateral direction of the packaging box 10, in which the pair of side plates 18 face each other, is called the Y direction. , the height direction of the packaging box 10 in which the top plate 16 and the bottom plate 17 face each other is referred to as the Z direction. The dimensions of the packaging box 10 in the X direction, the Y direction, and the Z direction can be changed as needed.

As shown in FIG. 1, the top plate 16 and the bottom plate 17 are formed in substantially the same rectangular shape extending along the XY plane, and are opposed to each other with a gap in the Z direction. The pair of side plates 18 are formed in the same rectangular shape extending along the XZ plane, and are arranged facing each other with a gap in the Y direction. On both sides of the top plate 16 in the Y direction, the upper ends of side plates 18 are connected via bent portions (first bent portions) 20, and on both sides of the bottom plate 17 in the Y direction, via bent portions 21. The lower ends of the side plates 18 are connected to each other. Each side plate 18 is bent downward in the Z direction (a direction crossing the X direction in which the bent portion 20 extends) with respect to the top plate 16 and is bent upward in the Z direction with respect to the bottom plate 17 .

Referring to FIG. 2, the top plate 16, one of the pair of side plates 18, the bottom plate 17, and the other of the pair of side plates 18 are connected in this order from top to bottom. In FIG. 2, the side plate 18 positioned at the lower end is connected with a mounting plate 19 for adhering to the top plate 16 positioned at the upper end. That is, one sheet of top plate 16 is formed by adhering the attaching margin plate 19, and the outer peripheral wall 15 in the shape of a rectangular cylinder is formed. Between the top plate 16 and one of the side plates 18 and between the attachment margin plate 19 and the other side plate 18, bending lines 20' forming bending portions 20 are formed. Between the bottom plate 17 and the pair of side plates 18, bending lines 21' forming bending portions 21 are respectively formed. These folding lines 20', 21' consist of general ruled lines.

Referring to FIG. 1, the pair of lid walls 25 are formed in substantially the same rectangular shape extending along the YZ plane, and are opposed to each other with a gap in the X direction. The inner flaps 26 constituting the lid wall 25 are connected to both ends of the pair of side plates 18 in the X direction via bent portions (second bent portions) 28, respectively, and are arranged in the same manner as the top plate 16 with respect to the side plates 18. It is bent in the direction (inward in the X direction). The outer flaps 27A are connected to both ends of the top plate 16 in the X direction via bent portions (third bent portions) 29, respectively. are connected to each other via On the same end side in the X direction, the outer flap 27A is bent with respect to the top plate 16 so as to overlap the outer upper portion of the pair of inner flaps 26, and the outer flap 27B is bent so as to overlap the outer lower portion of the pair of inner flaps 26. is bent with respect to the bottom plate 17 .

Referring to FIG. 2, each inner flap 26 is connected to the side plate 18 via a folding line 28' forming a folding portion 28. As shown in FIG. Each outer flap 27</b>A is connected to the top plate 16 via a folding line 29 ′ forming a folding portion 29 . Each outer flap 27B is connected to the bottom plate 17 via a folding line 30' forming a folding portion 30. As shown in FIG. These folding lines 28'-30' consist of general ruled lines.

The packaging box 10 is made, for example, as follows. First, in the blank state of FIG. 2, articles to be accommodated are arranged on the upper surface (back liner side) of the bottom plate 17 . Subsequently, after bending the pair of side plates 18 with respect to the bottom plate 17 , the attachment allowance plate 19 and the top plate 16 are bent with respect to the pair of side plates 18 . Then, the inner surface of the top plate 16 and the outer surface of the mounting margin plate 19 are adhered (hot-melted) using an adhesive such as hot-melt resin (inner glue). However, the inner surface of the attachment margin plate 19 may be adhered to the outer surface of the top plate 16 (outer glue).

Next, each of the inner flaps 26 is folded with respect to the side plate 18 . Subsequently, the outer flap 27A is folded with respect to the top plate 16, and the outer flap 27B is folded with respect to the bottom plate 17. As shown in FIG. Then, the overlapping portions of the inner flap 26 and the outer flaps 27A and 27B are adhered by hot-melt (adhering portion 32). Thereby, the lid wall 25 is formed, and the openings at both ends of the outer peripheral wall 15 are sealed.

(Outline of opening structure of packaging box)
As shown in FIGS. 1 and 5, the packaging box 10 is divided into upper and lower halves and unfolded (divided) to the top plate 16 side and the bottom plate 17 side. , two breaking lines 40 and 42, one cutting line 44, and a pair of auxiliary folding lines 46 are provided. In addition, as shown in FIGS. 1 and 8, the packaging box 10 is broken into strips, and the top plate 16 side is divided into pieces for opening. In addition to 40, 42, there is also a break line 48, two cut lines 50, 52 and a break line 54.

The operation part 35 is a part held by the operator when opening the side plate 18 by the first method. As shown in FIGS. 1 and 3, the operating portion 35 is defined by one folding line 36, a pair of first breaking lines 37, and a second breaking line 38, and is positioned approximately in the center of the side plate 18. is provided in The folding line 36 consists of a general-purpose ruled line and extends parallel to the folding portion 20 along the X direction. Each first breaking line 37 consists of two or more cutting lines and extends in an arc shape from both ends of the folding line 36 outward in the X direction. The second breaking line 38 consists of two or more cutting lines (cutting portions), and extends in an arc shape from one of the outer ends of the pair of first breaking lines 37 in the X direction to the other. That is, the second breaking line 38 extends in the X direction along the bent portion 20 . The operation part 35 may be an opening (cutting part) punched by a paper container punching device.

A breaking line (first breaking line) 40 is provided for breaking the side plate 18 by operating the operating portion 35 . The break line 40 is located in the center of the side plate 18 in the Z direction (total height), and is provided on both sides of the operation portion 35 of the side plate 18 so as to extend in the X direction connecting with the second break line 38 . . The breaking line 40 is composed of a plurality of cutting lines provided at predetermined intervals that can be broken, and as a whole is formed in a wavy shape that repeats arc-shaped irregularities. The breakable interval means a length where adjacent cutting lines can be connected by breaking by applying force by the operator, and breaking along the breaking line 40 can be realized. is.

As shown most clearly in FIG. 3, the first end 40a of the breaking line 40 located on the operation portion 35 side is arranged on the same point as the outer end of the first breaking line 37 in the X direction, and the second It is located at a breakable interval from the outer end in the X direction at the breaking line 38 . However, the first end 40a may be arranged continuously with the second break line 38 and spaced from the first break line 37, or may be arranged so as to be continuous with both of the break lines 37, 38. , or may be spaced apart on both break lines 37,38. That is, connecting with the second break line 38 may be strictly continuous or may be substantially (breakable) continuous.

A cutting line 40 b of the breaking line 40 positioned closest to the bent portion 28 is inclined in a direction toward the bent portion 28 toward the top plate 16 . A second end 40c of the cutting line 40b located on the bent portion 28 side is an end portion of the breaking line 40, and is separated from the bent portion 28 by a predetermined distance ( second distance ) D1 (for example, 10 mm). are placed open.

A breaking line (second breaking line) 42 is provided for breaking the inner flap 26 by operating the outer flap 27A. Referring to FIG. 1, the breaking lines 42 are provided on each of the inner flaps 26 so as to extend along the bent portion 29 in the Y direction. Moreover, the breaking line 42 is provided substantially in the center of the inner flap 26 in the Z direction (total height) so as to be positioned between the pair of outer flaps 27A and 27B. The rupture line 42 is composed of a plurality of rupturable cut lines provided at intervals, and extends linearly from the bent portion 28 toward the tip of the inner flap 26 . The breaking lines 42 of the present embodiment include a plurality of first cutting lines provided at intervals that can be broken in the Y direction, and a plurality of first cutting lines extending obliquely from the end of the first cutting lines on the bent portion 28 side. It is constructed by a single zipper with two cutting lines.

Referring to FIG. 3 together with FIG. 1, a notch portion 26a is provided at the center of the tip end of the inner flap 26 toward the side plate 18 and cut in the Y direction. A first end 42a of the break line 42 located on the tip side of the inner flap 26 reaches the edge of the notch 26a. However, the first end 42a may be arranged at a breakable interval with respect to the edge of the notch 26a.

A cutting line 42b of the breaking line 42 positioned closest to the bent portion 28 extends in a direction (Y direction) perpendicular to the bent portion 28 extending in the Z direction. A second end 42c of the cutting line 42b located on the bent portion 28 side is an end portion of the breaking line 42, and is separated from the bent portion 28 by a predetermined distance ( third distance ) D2 (for example, 10 mm). are placed open. The second end 42c of the present embodiment is arranged above the second end 40c of the breaking line 40 in the Z direction.

A score line (third score line) 44 is provided to prevent breakage along one of the breaklines 40, 42 and subsequent breakage along the other during opening by the first method. is provided. As shown in FIG. 1, the cut line 44 is provided along the bent portion 28 located between the second end 40c of the break line 40 and the second end 42c of the break line 42. As shown in FIG. Referring also to FIG. 3, score line 44 has a first end located on fold line 28' and a second end located on inner flap 26, extending from the first end to the second end. It consists of a pair of cutting lines sloping downwards towards the ends. These cutting lines are spaced apart in the Z direction. The lower end of the cutting line located on the lower side is arranged between the second end 40c of the breaking line 40 and the second end 42c of the breaking line 42, and the upper end of the cutting line located on the upper side is the second end of the breaking line 42. It is arranged above the end 42c.

The cut line 44 may be composed of a single cutting line extending in the Z direction on the folding line 28', or may be composed of a first cutting line extending in the Z direction on the folding line 28'. It may be configured with a second cutting line that is inclined with respect to the folding line 28', and its configuration can be changed as necessary. However, it is preferable that the lower end of the cut line 44 as a whole be arranged at least below the breaking line 42 positioned above, and the upper end be arranged above the breaking line 42 positioned above.

As shown in FIG. 3, the distance D1 between the breaking line 40 and the bent portion 28 and the distance D2 between the breaking line 42 and the bent portion 28 are the second end 40c of the breaking line 40 and the second end 42c of the breaking line 42. , and the cut line 44 are set so as to satisfy the following.

A second end 40c of the breaking line 40 and a second end 42c of the breaking line 42 are arranged with a predetermined space A therebetween. The second end 40c of the breaking line 40 and the cut line 44 are arranged with a predetermined interval B therebetween. A second end 42c of the breaking line 42 and the cutting line 44 are arranged with a predetermined interval C therebetween. The interval A is set based on the linear distance (creeping distance) between the second ends 40c and 42c in the blank state. The intervals B and C are set based on the shortest creepage distance from the second ends 40c and 42c to the cut line 44 (for example, 0.5 mm or more and 20 mm or less).

The interval B is set smaller than the interval A (A>B), and the interval C is set smaller than the interval A (A>C). This prevents the tearing of the side plate 18 along the tearing line 40 from stopping at the cut line 44 and the subsequent tearing of the inner flap 26 along the tearing line 42 . Further, the breakage of the inner flap 26 along the breakage line 42 is stopped at the cut line 44, and the subsequent breakage of the side plate 18 along the breakage line 40 is prevented.

Thus, the break line 40 and the break line 42 are formed discontinuously, and the cut line 44 and the break line 40, and the cut line 44 and the break line 42 are also formed discontinuously. Therefore, it is possible to reduce the decrease in impact resistance against the application of external force to the bent portion 28 . Moreover, by providing the breaking lines 40, the breaking lines 42, and the cut lines 44, it is possible to prevent the strength of the bent portion (ridge portion) 28 from being excessively lowered. As a result, even if the packaging box 10 is dropped or another article collides with it during transportation, it is possible to prevent the edges from being crushed.

Auxiliary folding lines 46 are provided to facilitate breaking along the breaking line 40 . As shown in FIG. 1 , the auxiliary folding lines 46 are provided on the side plate 18 so as to be positioned on both sides of the breaking line 48 . In this embodiment, in the X direction, a set of auxiliary folding lines 46a provided at the end of the side plate 18 and a second auxiliary folding line 46b provided at the center side of the side plate 18. 46 are configured.

As shown in FIGS. 1 to 3, the first auxiliary folding line 46a is a reverse ruled line, and is provided so as to slope outward in the X direction from the upper side to the lower side in the Z direction. The upper end of the first auxiliary folding line 46a is spaced apart from the folding portion 20 (folding line 20'). The lower end of the first auxiliary bending line 46a is spaced apart from the bending portion 28 (bending line 28'). The inclination of the first auxiliary folding line 46 a is set at an angle at which the extension line of the first auxiliary folding line 46 a intersects the cut line 44 .

The second auxiliary folding line 46b is composed of a general-purpose ruled line, and is provided so as to incline outward in the X direction from the lower side to the upper side in the Z direction. The lower end of the second auxiliary folding line 46b is spaced apart from the folding line 36 and the breaking line 48 of the operating portion 35. As shown in FIG. The upper end of the second auxiliary folding line 46b is spaced apart from the folding section 28 (folding line 28'). The inclination of the second auxiliary folding line 46b is set to an angle at which the extension of the second auxiliary folding line 46b intersects the intersection of the extension of the first auxiliary folding line 46a and the bending portion 28 (folding line 28'). It is

A break line (third break line) 48 is a portion that an operator holds when opening the side plate 18 by the second method. As shown in FIG. 1 , the breaking lines 48 pass through the operating portion 35 and are provided at the center of the side plate 18 in the X direction so as to be positioned between the second breaking lines 38 and the bent portion 20 . there is That is, the breaking line 48 is arranged in the center between the pair of outer ends 35a of the operating portion 35 extending in the X direction. Here, the distance between the pair of outer ends 35a, that is, the lateral width of the operation portion 35 in the X direction is set to a dimension (for example, 100 mm) into which an adult operator's hand can be inserted. However, the break line 48 is not limited to the center as long as it is between the pair of outer ends 35a, and may be arranged to be biased to one side in the X direction.

Referring to FIG. 3 , the break line 48 consists of a plurality of breakable, spaced cut lines and extends linearly along the bent portion 28 . A lower end (first end) 48 a of the breaking line 48 is arranged between a pair of central cutting lines (non-cutting portion) among the plurality of cutting lines forming the second breaking line 38 . However, the lower end 48a is not limited to being on the second break line 38, and may be arranged near the second break line 38 with a breakable interval. An upper end (second end) 48 b of the breaking line 48 is arranged between a pair of cut lines 50 adjacent in the Y direction and positioned on the bent portion 20 . However, the upper end 48b is not limited to being on the bent portion 20, and may be arranged near the bent portion 20 (cutting line 50) with a breakable interval therebetween. The breaking line 48 is provided so that the folding line 36 of the operating portion 35 is positioned at a non-cutting portion between predetermined adjacent cutting lines among the plurality of cutting lines forming the breaking line 48 .

The cut line (first cut line) 50 functions as a starting point (starting point) for breaking between the top plate 16 and the side plate 18 along the bent portion 20 . A pair of the cut lines 50 are provided on the bending portion 20 (bending line 20') so as to extend from the upper end 48b of the breaking line 48 toward the bending portion 28 in a direction intersecting the breaking line 48. there is

An inner end 50a of the cut line 50 positioned on the breaking line 48 side is positioned on the bent portion 20 and is spaced apart from the breaking line 48 so as to be broken. However, the inner end 50a may be arranged on the same point as the upper end 48b of the breaking line 48 . In other words, the pair of cut lines 50 may be composed of one line.

The outer end 50b of the cut line 50 is arranged at a position where the distance (overall length) from the inner end 50a is 20 mm or more and 50 mm or less. If the total length of the cut line 50 is less than 20 mm, the cut line 50 does not function as a fracture starting point. If the total length of the cut line 50 exceeds 50 mm, the rigidity of that portion is excessively reduced. In order to avoid these inconveniences, it is preferable to set the total length of the cut line 50 within the range defined above.

The cut line 52 (second cut line) functions as a starting point for breaking along the bent portion 29 between the top plate 16 and the outer flap 27A. The cut line 52 is provided on the bent portion 29 (bent line 29 ′) so as to extend from the side plate 18 toward the center of the bent portion 29 . The cut line 52 consists of two cutting lines provided with a breakable interval.

An outer end 52a of the cut line 52 located on the side plate 18 side is arranged with a breakable interval from the end of the bent portion 29 . That is, the outer end 52 a is arranged near the end of the bent portion 29 . However, the outer end 52 a may be arranged at the end of the bent portion 29 . The inner end 52b of the cut line 52 remote from the side plate 18 is spaced apart from the outer end 52a. This interval corresponds to the total length of the cut line 52, and the total length is set in the range of 20 mm or more and 50 mm or less. Although the total length of the cut line 50 and the total length of the cut line 52 are set within the same numerical range, the actual total lengths of the two may differ within this range. Also, the cut line 52 may be composed of one cutting line, or may be composed of three or more cutting lines. Furthermore, the cut line 50 may also be composed of two or more cutting lines.

The break line 54 is provided to stop breakage of the outer flap 27A when opening by the second opening method. The breaking line 54 is positioned on the opposite side of the side plate 18 with respect to the sticking portion 32, and is located on the center side of the sticking portion 32 and at the tip of the inner flap 26 in the Y direction. It is provided so as to extend along 28 . The breaking line 54 consists of two cutting lines provided with a breakable interval.

An upper end 54 a of the breaking line 54 located on the bent portion 29 side is arranged on the bent portion 29 . However, the upper end 54a may be arranged near the bent portion 29 with a breakable interval therebetween. A lower end 54b of the breaking line 54 located on the tip side of the outer flap 27A is arranged with a spacing ( first spacing ) D3 from the tip of the outer flap 27A. The interval D3 corresponding to the uncut portion is set to a length (for example, 20 mm) that can prevent the outer flap 27A from being broken along the breaking line 54 by the opening operation of the outer flap 27A when opened by the first opening method. ing.

Next, a method for opening the packaging box 10 will be described.

For the packaging box 10, the operator can select the one that is easier to open, the first method considering the workability of opening, or the widely known second method of opening with a tear strip. As shown in FIG. 5, when the package is opened by the first method, the bottom plate 17 side becomes a tray shape, and the top plate 16 side becomes unfolded. As shown in FIG. 8, when the package is opened by the second method, the bottom plate 17 side is shaped like a tray and the top plate 16 side is subdivided.

(Overview of the first opening method)
When opening the packaging box 10 by the first method, for example, in the state shown in FIG. 1, a hand is inserted between the outer flaps 27A and 27B and the outer flap 27A is pulled outward in the X direction and upward in the Z direction. As a result, the inner flap 26 is broken along the breaking line 42 without breaking the outer flap 27A along the breaking line 54 . The tearing of the inner flap 26 stops when the tearing line 42 reaches the cut line 44 from the second end 42c of the tearing line 42 . Subsequently, by further operating the outer flap 27A, as shown in FIG. 4, the inner flap 26 and the side plate 18 are separated from the cut line 44 along the bent portion 28 extending in the same direction as the operating direction. Between (edges) is broken.

At this time, the second end 42c of the breaking line 42 and the second end 40c of the breaking line 40 are positioned with intervals D1 and D2 (see FIG. 3) with respect to the bent portion 28, and the breaking line 42 is Extending in the Y direction, the breaking line 40 extends in the X direction (extending directions are different). In addition, the bent portion 28 is in a state of being more easily torn by bending than other portions. Therefore, after the inner flap 26 is broken along the breaking line 42 , the side plate 18 is not broken along the breaking line 40 , but can be reliably broken along the bent portion 28 .

Next, the operating portion 35 is pressed from the outside to open, and a hand is inserted into the packaging box 10 through the opening to pull the top plate 16 side of the side plate 18 outward in the Y direction and upward in the Z direction. As a result, the side plate 18 is broken along the breaking line 40 . At this time, the side plate 18 is mountain-folded along the second auxiliary folding line 46b, and the side plate 18 is valley-folded along the first auxiliary folding line 46a. The bending of the auxiliary bending lines 46a and 46b facilitates the breakage of the side plate 18 along the breaking line 40. As shown in FIG. Moreover, since the breaking line 48 is provided in the center of the operation portion 35 , the operator grasps both sides of the breaking line 48 on the side plate 18 . Therefore, it is possible to reliably break the side plate 18 along the breaking line 40 while suppressing breakage of the side plate 18 along the breaking line 48 .

The breakage of the side plate 18 stops when it reaches the cut line 44 from the second end 40c of the breakage line 40 . Subsequently, by further operating the side plate 18, the portion between the side plate 18 and the inner flap 26 is broken along the bent portion 28, connecting to the portion already broken by the operation of the outer flap 27A. In addition, since the cutting line 40b at the outer end of the breaking line 40 is inclined upward, the breaking may progress from the second end 40c to the already broken portion.

As a result, as shown in FIG. 5, the packaging box 10 is in the first unsealed state in which the bottom plate 17 side is formed into a tray shape and the top plate 16 side is expanded into a sheet shape. A portion of the side plate 18, a portion of the inner flap 26, and an outer flap 27A are connected to the top plate 16 in the unfolded state. In opening the packaging box 10 by the first method, the side plate 18 may be broken first, and then the inner flap 26 may be broken.

(Outline of the second opening method)
When the packaging box 10 is opened by the second method, the tear strips 56 are used between the fold 20 and the break line 40 and between the fold 29 and the break line 42 . Specifically, in the state shown in FIG. 1, the side plate 18 is broken by pressing the breaking line 48 from the outside. However, the breakage along the breakage line 48 may be performed from the opening portion after the operation portion 35 is opened.

Subsequently, one of the tear strips 56 on both sides of the tear line 48 is grasped and pulled outward in the X direction. As a result, the side plate 18 is broken along the breaking line 40 . In addition, the uncut portion between the breaking line 48 and the cut line 50 is broken, and with this breaking as a starting point, the side plate 18 and the top are cut along the bent portion 20 that is easier to break than the other portions. Between the plates 16 is broken.

As shown in FIG. 6, when the tear band 56 is manipulated in the X direction and the side plate 18 is torn to the end in the X direction, the operator pulls the tear band 56 in the Y direction. Thereby, the break along the break line 40 is connected to the break line 42 via the cut line 44 , and the inner flap 26 is broken along the break line 42 . In addition, the uncut portion between the end of the bent portion 29 and the outer end 52a of the cut line 52 is broken, and starting from this broken portion, the bent portion 29 is more easily torn by bending than the other portions. , the space between the outer flap 27A and the top plate 16 is broken.

As shown in FIG. 7, the tearing of the inner flap 26 along the tearing line 42 stops when it reaches the notch 26a. The tearing along the bent portion 29 stops when the tearing band 56 (outer flap 27A) bends along the tearing line 54 when the tearing line 54 is reached. In this state, the operator tears the tear band 56 (outer flap 27A) along the tear line 54. As shown in FIG.

By breaking all the tear strips 56 divided into four parts, as shown in FIG. 8, the bottom plate 17 side is made into a tray shape and the top plate 16 side is subdivided into a second unsealed state. A part of the outer flap 27A is connected to the top plate 16 separated by breaking.

The packaging box 10 of this embodiment configured in this manner has the following features.

Since the tearing lines 40 and 48 provided on the side plate 18 and the tearing line 42 provided on the inner flap 26 are provided, in addition to the first method of opening the top plate 16 side, the tear band 56 is used to open the bag. It can be opened by the second widely known method. Therefore, the operator can select the one that is easier to open from the first method considering the unsealing workability and the widely known second method, so that the convenience can be improved. never make you feel

When opening by the first method, when the side plate 18 is broken along the breaking line 40, the bending of the side plate 18 along the auxiliary folding lines 46 on both sides of the breaking line 48 causes the operating force to be applied to the breaking line 40. I can tell you. Moreover, since the breaking line 48 is provided between the operating portion 35 and the bending portion 20 , the operator grasps both sides of the breaking line 48 in the side plate 18 . Therefore, it is possible to reliably break the side plate 18 along the breaking line 40 while suppressing breakage along the breaking line 48 .

Since the bent portion 28 is provided with the cut line 44, the cut line 44 is used to prevent the break along one of the break line 40 and the break line 42, followed by the break along the other. be able to. Further, the break line 48 allows switching from transverse break along the break line 40 or break line 42 to break along the fold 28 starting from the cut line 44 . Therefore, the unsealing workability by the first method can be improved.

When the package is opened by the second method, the tear band 56 can be broken between the tear line 40 and the bent portion 20 and between the tear line 42 and the bent portion 29 . Since the opening method using this tear band 56 is widely known, the opening workability and convenience for the operator can be effectively improved.

When breaking along the bent portion 20, the cut line 50 is the starting point, and when breaking along the bent portion 29, the cut line 52 is the starting point. Moreover, the breaking line 54 provided on the outer flap 27A can prevent the tear band 56 from breaking due to excessive lengthening of the tear band 56 . Therefore, it is possible to improve the unsealing workability by the second method.

(Second embodiment)
9 and 10 show the packaging box 10 according to the second embodiment. The packaging box 10 of the second embodiment differs from the packaging box 10 of the first embodiment in that the operation portion 35, the breaking line (first breaking line) 40, and the cut line 44 are changed. Other configurations are the same as those of the first embodiment.

The operating portion 35 has a folding line 36 extending in the X direction and a breaking line 38 extending from one end of the folding line 36 to the other end, and is formed in a semicircular shape as a whole. The width of the operating portion 35 in the X direction (the distance between the pair of outer ends 35a) is set to a dimension (for example, 65 mm) into which two fingers (index finger and middle finger) of an adult worker can be inserted. . A breaking line 48 is provided for the operation portion 35 in the same manner as in the first embodiment.

The breaking line 40 is formed in a straight line extending in the X direction along the bending portion 20 (bending line 20'). In addition, the breaking lines 40 include a plurality of first cutting lines provided at intervals that can be broken in the X direction, and a plurality of second cutting lines extending obliquely from the end of the first cutting lines on the operation unit 35 side. and a single zipper.

The cut line 44 is formed by a single cutting line extending in the Z direction on the bent portion 28 (bend line 28').

The packaging box 10 of the second embodiment configured in this way can obtain the same actions and effects as those of the first embodiment. In particular, the lateral width of the operating portion 35 of the second embodiment is smaller than the lateral width of the operating portion 35 of the first embodiment. can be grasped. Therefore, when opening by the first method, the side plate 18 can be reliably broken along the breaking line 40 while suppressing breakage along the breaking line 48 .

(Third embodiment)
11 to 15 show a packaging box 10 according to a third embodiment. The packaging box 10 of the third embodiment has a total height in the Z direction, a breaking line (first breaking line) 40, an auxiliary folding line 46, and a breaking line (third breaking line) 48, and a cut line The packaging box 10 differs from the packaging box 10 of the first embodiment in that the 50 is not provided. Other configurations are the same as those of the first embodiment.

As shown in FIG. 11, the packaging box 10 of the third embodiment is set to be higher than the overall height of the packaging box 10 of the first embodiment shown in FIG. 1, about 1.5 times higher. Also referring to FIG. 12, along with this setting change, the projecting dimension of the outer flaps 27A and 27B from the folded portion 29 (folded line 29') to the tip end becomes larger. The projection dimension of the inner flap 26 from the curve 28') to the tip is also increased. Therefore, the position of the broken line 54 is also changed.

11 to 13, the breaking line 40 is generally formed in an arcuate shape protruding downward, with the lowest first end 40a on the operating portion 35 side and the first end 40a on the bending portion 28 side. The position of the second end 40c is the highest. The position of the first end 40a including the operation portion 35 is arranged below the half of the height of the side plate 18. As shown in FIG. The position of the second end 40 c is arranged at a position approximately half the height of the side plate 18 . Each cutting line is formed in a substantially Y shape that is bifurcated on the operation portion 35 side.

The auxiliary folding line 46 differs from the first embodiment in that it does not have a second auxiliary folding line 46b (see FIG. 1) made of a general-purpose ruled line, but only a first auxiliary folding line 46a made of a reverse ruled line.

The breaking line 48 connects a single first breaking portion (first portion) 48A provided on the operation portion 35 side and a pair of second breaking portions (second portions) 48B provided on the top plate 16 side. Prepare.

The first breaking portion 48A is provided in the center between the pair of outer ends 35a of the operating portion 35 extending in the X direction. Specifically, the first breaking portion 48</b>A is composed of a plurality of cutting lines provided at breakable intervals, and extends linearly in the Z direction along the bent portion 28 . A lower end 48a of the breaking line 48, which is the lower end (first end) of the first breaking portion 48A, is arranged on the second breaking line 38 as in the first embodiment. A branch portion 48c of the breaking line 48, which is the upper end (second end) of the first breaking portion 48A, is arranged with a gap ( fourth gap ) D4 from the bent portion 20. As shown in FIG. This interval D4 is determined by setting the total length of the first breaking portion 48A from the lower end 48a to the branch portion 48c. The total length of the first breaking portion 48A is the shortest possible length (for example, 100 mm) in the range where the edge of the first breaking portion 48A, which becomes the end of the tear band 56, can be held when opening by the second method. is set to That is, when the total height of the packaging box 10 is high, the first breaking portion 48A is provided in the operation area for opening by the second method, and the pair of inclined second breaking portions 48B are provided in the remaining area (interval D4). ing.

The second breaking portion 48B is provided between the branch portion 48c and the bent portion 20, respectively. The pair of second breakage portions 48B are inclined so as to separate from each other from the branch portion 48c toward the bent portion 20 . Each of the second breaking portions 48B includes a plurality of first cutting lines that are linearly provided with breakable intervals, and a plurality of second cutting lines that extend obliquely from the ends of the first cutting lines on the operation unit 35 side. It is composed of a single zipper with a cutting line. A pair of upper ends (second ends) 48b of the breaking line 48, which are the upper ends of the second breaking portions 48B, are positioned on the bent portion 20 and spaced apart in the Y direction.

The first opening method of the packaging box 10 of the third embodiment is the same as that of the packaging box 10 of the first embodiment. As shown in FIG. 14, the top plate 16 unsealed by the first method includes a portion of the side plate 18, a portion of the inner flap 26, and an outer flap 27A, which are connected in the same manner as in the first embodiment. there is

A second opening method of the packaging box 10 of the third embodiment is as follows. First, the side plate 18 is broken along the first breaking portion 48A. Subsequently, one of the tear strips 56 on both sides of the first breaking portion 48A is grasped and pulled outward in the X direction. As a result, the side plate 18 is broken along the breaking line 40 . Further, the side plate 18 is broken along the second breaking portion 48B, and subsequently the portion between the side plate 18 and the top plate 16 is broken along the bent portion 20. As shown in FIG. Fracture after that is the same as in the first embodiment.

As shown in FIG. 15, in the top plate 16 opened by the second method, part of the side plate 18 and part of the outer flap 27A are connected. A portion of the side plate 18 is a region surrounded by the pair of second breaking portions 48B and the bent portion 20. As shown in FIG.

The packaging box 10 of the third embodiment configured in this way can obtain the same actions and effects as those of the first embodiment. In addition, in the third embodiment, since the breaking line 48 is formed in a Y shape including the first breaking portion 48A and the pair of second breaking portions 48B, the total height of the packaging box 10 (side plates 18) is high. Also, the opening workability by the second method can be improved. Specifically, when the break line 48 of the packaging box 10 with a wide interval from the break line 40 to the bent portion 20 is straight, the total length of the break line 48 is also long. The work of forming the fracture starting point becomes complicated. On the other hand, in the third embodiment, since the breaking line 48 is Y-shaped, only the first breaking portion 48A, which is part of the breaking line 48, needs to be broken when opening the package. By holding the edge of the first breaking portion 48A and operating it, the side plate 18 can be broken along the remaining second breaking portion 48B and the bent portion 20 . Therefore, even if the packaging box 10 has a high overall height, the opening workability by the second method can be improved.

In addition, the packaging box 10 of the present invention is not limited to the configuration of the above embodiment, and various modifications are possible.

For example, only one of the pair of side plates 18 may be provided with the break lines 40 and 48 , and only the pair of inner flaps 26 connected to the one side plate 18 may be provided with the break lines 42 . Further, the auxiliary folding lines 46 may be provided only with the auxiliary folding lines 46b consisting of general ruled lines without providing the auxiliary folding lines 46a consisting of reverse ruled lines. The third breaking line 48 may be provided so as to be inclined with respect to the bent portions 20 and 28 as a whole. In the first unsealed state, the packaging box 10 may be divided into the top plate 16 side and the bottom plate 17 side without providing the cut line 44 on the bent portion 28 .

Unlike the packaging box 10 of the third embodiment, the packaging box 10 of the first embodiment and the second embodiment does not need to be provided with the cut line 50 . Moreover, the packaging box 10 may be provided with the cut line 50 and not provided with the cut line 52, or may not be provided with both the cut line 50 and the cut line 52. - 特許庁Of course, the cut line 50 may be provided in the packaging box 10 of the third embodiment. In this case, it is provided on the bending portion 20 (bending line 20') so as to extend outward in the X direction from the pair of upper ends 48b.

The breaking lines 40, 42, and 48 are not limited to having a plurality of spaced cutting lines, and may be half-cut lines that cut the back liner side and leave the front liner side uncut. good. Moreover, the breaking lines 40, 42, 48 are not limited to straight lines, and may be bent or curved.

The packaging box 10 is not limited to a rectangular shape in plan view, and may be octagonal in plan view by providing a chamfered portion between the side plate 18 and the inner flap 26 .

The material of the packaging box 10 is not limited to a cardboard sheet made of paper, and may be a cardboard sheet made of resin. Moreover, the material of the packaging box 10 is not limited to a corrugated cardboard sheet, and may be a single-layer cardboard or a resin sheet.

DESCRIPTION OF SYMBOLS 10... Packaging box 15... Peripheral wall 16... Top plate 17... Bottom plate 18... Side plate 19... Attachment board 20... Bending part (1st bending part)
20'... Folding line 21... Folding part 21'... Folding line 25... Cover wall 26... Inner flap 26a... Notch part 27A, 27B... Outer flap 28... Folding part (second folding part)
28'... folding line 29... folding part (third folding part)
29'... Folding line 30... Folding part 30'... Folding line 32... Sticking part 35... Operation part 35a... Outer end 36... Folding line 37... First breaking line 38... Second breaking line (cutting part)
40... Breaking line (first breaking line)
40a... First end 40b... Cutting line 40c... Second end (end)
42 ... breaking line (second breaking line)
42a... First end 42b... Cutting line 42c... Second end (end)
44... Cut line (third cut line)
46... Auxiliary folding line 46a... First auxiliary folding line 46b... Second auxiliary folding line 48... Broken line (third broken line)
48A ... First breaking part (first part)
48B ... second breaking part (second part)
48a... lower end 48b... upper end 48c... branch portion 50... cut line (first cut line)
50a... inner end 50b... outer end 52... cut line (second cut line)
52a... Outer end 52b... Inner end 54... Broken line (cutting line)
54a... Upper end 54b... Lower end 56... Tear band D1... Predetermined interval ( second interval )
D2 ... defined interval ( third interval )
D3: Predetermined interval ( first interval )
D4: Predetermined interval ( fourth interval )

Claims (7)

a baking sheet;
a side plate that is continuous with the top plate via a first bent portion and that is bent with respect to the top plate in a direction that intersects the direction in which the first bent portion extends;
a pair of inner flaps respectively connected to both ends of the side plate in the direction in which the first bent portion extends via a second bent portion and respectively bent with respect to the side plate in the same direction as the top plate;
A pair of the top plate, which are connected to both ends of the top plate in the direction in which the first bent portion extends, respectively via a third bent portion, and are bent with respect to the top plate so as to overlap the outer side of the inner flap. an outer flap;
an operation unit provided on the side plate;
a pair of first breaking lines respectively provided on both sides of the operating portion of the side plate so as to extend along the first bent portion;
a pair of second breaking lines respectively provided on the pair of inner flaps so as to extend along the third bent portion;
a third break line provided between the operation portion and the first bent portion of the side plate so as to extend along the second bent portion;
a pair of auxiliary folding lines provided on the side plate so as to be positioned on both sides of the third breaking line ;
a sticking portion for sticking the inner flap and the outer flap;
with
The outer flap is provided with a cutting line located on the side opposite to the side plate with respect to the sticking portion and extending along the second bent portion,
The cutting line is linear and has a first end located on or near the third bent portion, and a second end located at a first distance from the tip of the outer flap. box. each of the pair of first breaking lines has an end portion spaced a second distance from the second bending portion;
2. The packaging box of claim 1, wherein said pair of second break lines each have ends spaced a third distance from said second fold. The third break line is linear and has a first end located on the operation portion and a second end located on or near the first bent portion,
The packaging according to claim 1 or 2, wherein the first bent portion is provided with a first cut line extending from the second end of the third breaking line toward the second bent portion. box. The third breaking line is
a first portion having a first end located on the operating portion and a second end spaced apart from the first bent portion at a fourth distance ;
and a pair of second portions that are provided between the second end and the first bent portion and that are inclined in directions away from each other from the second end toward the first bent portion. The packaging box according to 1 or 2. 5. The method according to claim 1, wherein the third bent portion is provided with a second cut line extending from the end where the side plate is located or the vicinity thereof toward the center of the third bent portion. The packaging box according to any one of items 1 and 2. The second bending portion has a third bending portion positioned between an end portion of the first breaking line on the second bending portion side and an end portion of the second breaking line on the second bending portion side. 6. The packaging box according to any one of claims 1 to 5 , wherein score lines are provided. 7. Any one of claims 1 to 6 , wherein the operating portion is defined by at least a folding line extending along the first folding portion and a breaking line extending from one end side to the other end side of the folding line. The packaging box described in the paragraph.

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