JP6532291B2 - Cardboard blank sheet and packaging box - Google Patents

Description

  The present invention relates to a corrugated cardboard blank sheet provided with a top surface portion to be a top surface, a bottom surface portion to be a bottom surface, and a side surface portion to be a side surface, and a packaging box formed by assembling this corrugated cardboard blank sheet.

  Heretofore, a hexahedral packaging box formed by assembling corrugated blank sheets has been used for packaging beverage cans such as canned beer. For example, in this type of corrugated cardboard blank sheet disclosed in Japanese Patent Application Laid-Open No. 2008-280047 (Patent Document 1) or the like, a side surface portion which is a side surface of the packaging box is a member extending from one end to the other end in the lateral direction. A book tear strip is provided. Then, by pulling out the cut piece in this tear strip and cutting the side portion from the cut piece along the tear strip, the packaging box can be divided into two in the vertical direction and opened, The lower side of the packaging box used can be used as a tray (so-called half-traying). By half-traying, it is possible to display the beverage can in an exposed state in a beautiful appearance or to carry the beverage can as a tray.

  And, in order to secure the buckling strength when stacked as a packaging box, as shown in FIG. 9 showing the side surface portion in the conventional example, the tearing line 51 forming the tearing band 50 is a broken line shape, It is formed only on the back surface (see FIG. 9A) of the part (that is, only the back surface has a cut). In addition, although the cut-out piece portion 40 is assumed to pass through the front and back of the side portion (that is, there is a cut from the front surface to the back surface), the cut-out piece portion 40 is also to secure the buckling strength. So that the transverse cutting line 41 at the cutting edge and the tearing line 51 at the tearing zone 50 do not intersect or lie on the same line, the transverse cutting line 41 at the cutting piece 40 and the tearing line 51 at the tearing zone 50 They are spaced apart in the height direction (vertical direction) H.

JP 2008-280047 A

  However, in the above-mentioned conventional corrugated cardboard blank sheet, since the transverse cutting line 41 in the cut-out piece portion 40 and the tearing line 41 in the tearing band 50 are provided separately in the height direction H, the cutting is carried out at the time of opening. Even if it is attempted to cut the side surface portion from the piece portion 40, there is a possibility that the cutting does not proceed from the lateral cutting line end 41a of the cutting piece portion 40 toward the tearing line 50 as it is. If the side portion can not be cut along the tear line 51, the cutting requires an extremely large force. Further, since the tearing line 51 is formed only on the back surface, even if it can be smoothly cut from the transverse cutting line 41 toward the tearing line 51, a certain amount of force is required to tear the surface. Furthermore, when a certain amount of force is required for cutting, there is also a possibility that the tearing band 50 may be torn in the middle due to excessive force or the like. As described above, in the conventional corrugated cardboard blank sheet, there is a problem that half-traying can not always be easily performed.

  Further, when the cutting does not proceed from the transverse cutting line end 41 a toward the tearing line 51 and the side part can not be cut along the tearing line 51, the cutting edge does not become linear along the tearing line 51 It will be a distorted shape. Moreover, even if the cutting line 51 can be smoothly cut from the transverse cutting line 41, since the cutting line 51 is formed only on the back surface, the surface can be always cut along the cutting line 51. There is also a possibility that the shape may have a distorted shape with unevenness, such as a bent portion at the cutting edge. Thus, in the corrugated-cardboard blank sheet | seat used as the packaging box of a drink can, there existed a problem which half-tray formation could not necessarily perform precisely. Also, when the cutting edge has a distorted shape, the appearance becomes worse. And weight reduction of corrugated cardboard is advanced for the purpose of environmental load reduction in recent years, but as a result, when carrying the beverage can with the lower side of the packaging box as a tray, stress concentrates on the bent portion at the cutting edge As a result, there is a risk that the trayed packaging box will be bent.

  Therefore, corrugated blank sheets and packaging boxes are desired which can be easily and accurately half-trayed, and do not cause deflection of the packaging box when the corrugated trays are reduced in weight.

The cardboard blank sheet according to the present invention is
A corrugated cardboard blank sheet comprising a top surface portion which is a top surface when assembled as a packaging box, a bottom surface portion which is also a bottom surface, and a side surface portion which is also a side surface,
In the side part,
When it is a cutting line which penetrates the front and back of the above-mentioned side part, and is assembled as the above-mentioned packing box to a longitudinal cutting line which meets height direction when assembled as the above-mentioned packing box, and the above-mentioned longitudinal cutting line A pair of cut-out pieces disposed two on each side in the lateral direction and respectively defined by transverse cutting lines extending outward in the lateral direction;
A pair of transversely arranged broken lines extending through the front and back of the side portion, the pair being disposed on the outside in the lateral direction of each of the pair of cutout pieces. A tear band is formed ,
Each of the cut-out pieces and the tear-off bands corresponding to the cut-out pieces are formed at predetermined intervals longer than the broken line intervals of the cut lines at least in the lateral direction and shorter than the transverse cut lines It is done.

According to this configuration, by forming the tearing line forming the tearing band through the front and back of the side portion, it is possible to cut the side portion along the tearing line accurately for both the front and back sides, and it is necessary Power can be reduced. In addition, by providing the tear band on the outer side in the lateral direction of each cut piece, the side portion can be smoothly cut from the cut piece to the tear band, so that the side portion can not be cut along the tear band. Can be effectively suppressed. Therefore, half-traying can be easily and accurately performed, which causes various problems such as deterioration in appearance and sagging in the trayed packaging box due to the shape of the cutting edge being distorted. It can be effectively suppressed.
When the cut pieces and the tear bands are connected, there is a risk that the side portions may break from the cut pieces to the tear bands when a transverse impact is applied to the cardboard during transportation, but this configuration For example, since the cut-out piece portion and the tearing-off zone are separated, it is possible to effectively suppress the breakage due to the transverse impact during transport caused by the connection of the cutting-off piece portion and the tearing-off zone. In addition, the separation width is also a predetermined distance longer than the broken line interval of the tearing line and shorter than the transverse cutting line, and it is a separation width that is not too long, whereby cutting of the side part from the cut piece part to the tear band It is easy to be done smoothly.

  Hereinafter, the suitable aspect of the corrugated-cardboard blank sheet | seat which concerns on this invention is demonstrated. However, the scope of the present invention is not limited by the preferred embodiments described below.

  In one aspect, the lateral outer end of each of the transverse cutting lines in the pair of cutout pieces and the lateral inner end of the tearing line corresponding to the transverse cutting line It is preferable that the positions in the height direction are substantially the same.

  That is, when cutting the side surface portion from the cut-out piece, even if there is no special force adjustment or slight adjustment of the tensile direction, at least in the initial stage, the cut-out portion is cut accurately with no deviation in the cutting direction. Straight sides can be cut along the lateral direction from the end of the line. And according to this configuration, since the positions in the height direction of the outer end of the transverse cutting line and the corresponding inner end of the tearing line are substantially the same, the transverse direction of the cut-out piece While maintaining the condition from the cutting line end to the inner end of the tearing line, it is easy to cause the cutting of the side portion to reach the inner end of the tearing line. Therefore, the side portion can be cut from the cut-out piece portion to the tearing band with high accuracy.

  In one aspect, the pair of tear bands is at least to a position closer to the central position in the lateral direction than a position intermediate between the central position in the lateral direction and both end positions in the lateral direction of the side surface portion. It is preferable that each extend.

  According to this configuration, the tear band extends to a position closer to the central position than the intermediate position between the central position and the both end positions in the side surface portion, so half-traying is easy and accurate up to the intermediate position. It can be done well. Further, the shape of the cutting edge of the central portion in the lateral direction of at least the side surface portion does not have a distorted shape and can be a shape along the tear line. This makes it possible to make the shape of the cutting edge in the central portion where the specific gravity is large in appearance in appearance after half-traying. In addition, when carrying the trayed packaging box, if the cutting edge is uneven at the central portion, it is particularly likely to be bent. According to this configuration, the shape of the cutting edge at the central portion is cut away The shape along the line can more effectively suppress the problem of deflection that may occur in the trayed packaging box.

  In one aspect, it is preferable that the pair of tear bands extend respectively to the both end positions of the side surface portion.

  According to this configuration, since the side surface can be cut along the tear line up to the end of the side surface, half-traying can be performed more easily and accurately.

The packaging box according to the present invention is
The corrugated cardboard blank sheet according to the present invention is assembled and formed.

  According to this configuration, since the corrugated cardboard blank sheet is assembled to form the packaging box, it is possible to easily reveal the packaging box which can be easily and accurately half-trayed.

Top view of cardboard blank sheet Description perspective view of the packaging box Perspective view of a half-tray packaging box (A) A drawing showing the side part, (b) An enlarged view of the main part of the side part The figure which shows the side part in 2nd Embodiment The figure which shows the side part in another embodiment The figure which shows the side part in another embodiment The figure which shows the side part in another embodiment (A) A diagram showing the back surface of the side surface portion in the conventional example, (b) A diagram showing the surface of the side surface portion in the conventional example

First Embodiment
A first embodiment of a cardboard blank sheet and a packaging box according to the present invention will be described with reference to the drawings. The corrugated cardboard blank sheet 1 according to the present embodiment is provided with a top surface portion 2 which is a top surface when assembled as a packaging box X, a bottom surface portion 3 which is also a bottom surface, and side portions 4 and 5 which are also side surfaces. . A pair of cutouts 10 and 10 and a pair of tear bands 20 and 20 are formed on the side surfaces 4 and 5 respectively. The pair of cut-out pieces 10 and 10 are cutting lines passing through the front and back of the side parts 4 and 5, respectively, and the vertical cutting line 11 along the height direction H when assembled as the packaging box X Two of them are disposed on both sides of the transverse direction L when assembled as the packaging box X with respect to the cutting line 11, and are respectively defined by transverse cutting lines 12 and 13 extending outward in the transverse direction L. A pair of tear bands 20, 20 are defined by two dashed tear lines 21, 22 penetrating the front and back of the side portions 4, 5 and extending along the lateral direction L and juxtaposing in the height direction H The tear strip 20 is disposed on the outer side in the lateral direction L of each of the pair of cut-out pieces 10, 10. Thereby, half-traying can be performed easily and accurately. Hereinafter, the corrugated-cardboard blank sheet 1 which concerns on this embodiment for assembling the packaging box X which packages beverage cans, such as canned beer, is demonstrated in detail.

  The corrugated cardboard blank sheet 1 according to the present embodiment is, as shown in FIG. 1, a top surface portion 2 which is a top surface when assembled as a packaging box X, a bottom surface portion 3 which is also a bottom surface, and 1 and second side portions 4 and 5 are provided. In FIG. 1, the first side surface 4 is located between the top surface 2 and the bottom surface 3 and connected to both. The long side of one side of the second side face 5 is connected to the bottom face 3, and the long side of the other side is provided with a connecting part 6 to be connected to the top face 2 when assembled as the packaging box X. In the top surface 2 and the bottom surface 3, outer flaps 7 are provided on both sides in the lateral direction (left and right direction in FIG. 1) L. Inner flaps 8 are provided on both sides of the first and second side portions 4 and 5 in the lateral direction L.

  By assembling the corrugated cardboard blank sheet 1 having such a basic configuration in a predetermined procedure, a packaging box X shown in FIG. 2 is formed. Specifically, with the bottom surface 3 down, the cardboard blank sheet 1 is placed so that the top surface 2 and the bottom surface 3 face each other, and the first side face 4 and the second side face 5 face each other. It is bent into a tubular shape, and the connecting portion 6 provided on the second side portion 5 and the top surface portion 2 are joined by an adhesive or the like. Next, the inner flaps 8, 8 on one side of the first and second side face portions 4, 5 are bent inward, and then the outer flaps 7, 7 on one side of the top surface 2 and the bottom face 3 Then, the outer flaps 7 and 7 and the inner flaps 8 and 8 are joined together by an adhesive or the like. Finally, the packaging box X is formed by similarly joining the outer flaps 7 and the inner flaps 8 on the other side. At this time, in the packaging box X, the top surface portion 2 corresponds to the top surface, the bottom surface portion 3 corresponds to the bottom surface, and the first and second side surface portions 4 and 5 and the outer flaps 7 and 7 and the inner flaps 8 and 8 The faces 9, 9 produced by joining with the face correspond to the sides.

  Here, in the following, the “lateral direction” means the lateral direction of the first and second side portions 4 and 5 when assembled as the packaging box X with the bottom portion 3 down, “ The “height direction” means the height direction of the first and second side portions 4 and 5 when the packaging box X is assembled with the bottom portion 3 down.

  In addition, it may be at any timing that the packaging box X accommodates a beverage can such as canned beer. For example, the cans stored in the bottom portion 3 may be placed before assembling the packaging box X, and the packaging box X may be assembled in a state where the cans are placed on the bottom portion 3; The can may be accommodated in the cardboard blank sheet 1 from the opening 1 (portion corresponding to the surface 9).

  Then, in the corrugated cardboard blank sheet 1, the first and second side portions 4 and 5 are cut in the lateral direction L so that the packaging box X can be opened and divided in the up and down directions. An opening mechanism S is provided on the second side portions 4 and 5. By dividing the packaging box X in the height direction H, as shown in FIG. 3, the lower side of the bisected packaging box X can be used as a tray (so-called half-traying). By half-traying, the beverage can can be displayed nicely in an exposed state, or can be carried as a tray.

  The unsealing mechanism S has the same configuration in the first and second side portions 4 and 5 and the same configuration in both the back and front surfaces of the first and second side portions 4 and 5. Only the unsealing mechanism S on the surface of the first side surface 4 will be described using FIG. 4 showing the surface of the portion 4, the explanation of the unsealing mechanism S on the back surface of the first side surface 4, the surface of the second side surface 5 and The description of the unsealing mechanism S on the back side is omitted.

  As shown in FIG. 4, the unsealing mechanism S extends in the lateral direction L along with a pair of cutout pieces 10, 10 which are drawn out as cutout pieces at the time of opening and used as a starting point of the opening operation. A pair of tear bands 20 and 20 in which the side surface portion 4 is cut, and provided between the cut pieces 10 and 10 and the tear bands 20 and 20 corresponding to the cut pieces 10 and 10, respectively. It comprises the discontinuous space 30,30.

  The pair of cut-out pieces 10, 10 is defined from five cutting lines 11, 12, 13 arranged in an H shape passing through the front and back of the first side face 4. More specifically, two longitudinal cutting lines 11 along the height direction H in the first side face 4 and two on the both sides in the lateral direction L in the first side face 4 with respect to the longitudinal cutting lines 11 It is demarcated from the transverse cutting lines 12, 12, 13, 13 which extend toward the outside of L. In particular, as shown in FIG. 4B, two horizontal lines extending from the end 11a on the top surface 2 side (the upper side in FIG. 4) in the height direction H of the vertical cutting line 11 toward the outer sides in the horizontal direction L Horizontal cutting lines 12 and 12 are transverse cutting lines extending from the end 11 b on the bottom 3 side (the lower side in FIG. 4) in the height direction H of the longitudinal cutting line 11 toward both outer sides in the horizontal direction L As the transverse cutting lines 13 and 13. The cut piece portion 10 on one side is formed by the vertical cutting line 11 and the horizontal cutting lines 12 and 13 on one side in the horizontal direction L, and the vertical cutting line 11 and the horizontal cutting line 12 on the other side in the horizontal direction L , 13 to form the cut-out piece 10 on the other side, and a pair of cut-out pieces 10, 10 are formed.

  In addition, in order to ensure the buckling strength of the 1st side part 4, each end 11a, 11b of vertical cutting line 11 and each horizontal cutting line 12, 12, 13, 13 are not connected, but it separates slightly It is provided. However, since the separation width is small, when pulling out the cut-out piece portion 10 by pushing a finger into the vertical cutting line 11 or the like at the time of the opening operation, each end 11a, 11b of the vertical cutting line 11 is easily The first side surface portion 4 is torn from the inner side portions 12a, 12a, 13a, 13a in the lateral direction L of the respective transverse cutting lines 12, 12, 13, 13 and the cut-out piece 10 can be pulled out as a cut-out piece . Further, in the present embodiment, the horizontal cutting lines 12, 12, 13, 13 are parallel to the horizontal direction L.

  The pair of tear bands 20, 20 is disposed outside in the lateral direction L of each of the pair of cutout pieces 10, 10. Each of the tear bands 20 penetrates the front and back of the first side portion 4 and extends along the lateral direction L (in FIG. 4, which extends parallel to the lateral direction L) two broken lines in parallel in the height direction H It is demarcated from tear lines 21 and 22 (the top surface 2 side in height direction H is 21 and the bottom 3 side in height direction H is 22). In the pair of tear bands 20 and 20, since the tear lines 21 and 22 pass through the front and back of the first side surface portion 4, the tear lines 21 and 22 with high accuracy for both the front and back surfaces of the first side surface portion 4 And the force required for the opening operation is reduced.

  Furthermore, in this embodiment, the pair of tear bands 20, 20 extend to both end positions 4a, 4a in the lateral direction L of the first side surface portion 4, respectively. Thereby, the first side surface portion 4 can be cut along the tearing lines 21 and 22 to the ends 4 a and 4 a of the first side surface portion 4. In addition, the tear strip 20 is formed to extend to the inner flaps 8 provided on both sides in the lateral direction H of the first side surface portion 4.

  The cut-out pieces 10, 10 and the corresponding tear bands 20, 20 are formed to be separated by a predetermined distance D in the lateral direction L. More specifically, the outer ends 12b, 12b, 13b, 13b in the lateral direction L of the respective transverse cutting lines 12, 12, 13, 13 and the corresponding lateral lines L, 21, 22, 22 in the lateral direction L The inner end portions 21a, 21a, 22a, 22a are in a state of being separated by a predetermined interval D. Here, “corresponding” means to belong to the same side in the horizontal direction L with respect to the vertical cutting line 11, and to belong to the same side in the height direction H whether the top surface 2 side or the bottom surface 3 side. Thus, the discontinuous spaces 30, 30 are formed by forming the cut pieces 10, 10 and the corresponding tear bands 20, 20 at predetermined intervals D apart from each other. Then, by forming the discontinuous spaces 30, 30 in which the incisions do not exist in the lateral direction L of the first side surface portion 4, damage to the side impact during transportation of the first side surface portion 4 can be prevented.

  Here, the predetermined interval D is an interval which is longer than at least the broken line interval of the tear lines 21 and 22 and shorter than the transverse cutting lines 12 and 13. And, in terms of function, the predetermined distance D means that the cutting direction is not significantly deviated even if there is no special force adjustment or slight adjustment of the tensile direction, and the lateral cutting line outside of the cut out pieces 10, 10 with high accuracy. A gap not too long enough to cut the side surface along the horizontal direction L straight from the end 12b, 12b, 13b, 13b, and strengthen at least the buckling strength of the first side surface 4 to a desired buckling strength It is an interval that is not too short. Specifically, it is preferably 5 mm to 15 mm.

  Further, in the unsealing mechanism S, particularly, as shown in FIG. 4B, the outer end portions 12b, 12b, 13b, 13b of the respective transverse cutting lines 12, 12, 13, 13 in the pair of cutout pieces 20, 20. And the inner ends 21a, 21a, 22a, 22a of the tearing lines 21, 21, 22, 22 corresponding to the respective transverse cutting lines 12, 12, 13, 13 have substantially the same position in the height direction H It is arranged in the state of. Thereby, the cutting of the first side face portion 4 from the lateral cutting line outer end portions 12b, 12b, 13b, 13b is easy to reach the tearing line inner end portions 21a, 21a, 22a, 22a.

  The above is the configuration of the opening mechanism S. Next, half-traying of the packaging box X using the opening mechanism S will be described. For example, first, with respect to the first side surface portion 4, a finger is inserted into the longitudinal cutting line 11 in the cutout pieces 10 and 10, and one cutout piece 10 is drawn out. Along with this, the first side surface 4 is torn from each end 11a, 11b of the longitudinal cutting line 11 to the inner end 12a, 13a of the horizontal cutting line, and the cut piece 10 can be pulled out as a cut piece. Then, when the cut-out piece 10 pulled out as the cut-out piece is pulled to the outside in the lateral direction L, the first side face 4 extends from the lateral cutting line outer end 12b, 13b to the tearing line inner end 21a, 22a. It is cut off. After the first side surface 4 is cut to the tear line inner ends 21a and 22a, the first side surface 4 is cut along the tear lines 21 and 22 as it is. Then, the first side surface 4a is cut to the end 4a of the first side surface 4, and the inner flap 8 is also cut along the tear lines 21 and 22 extending to the inner flap 8. Then, the same operation is performed on the other cut-out piece 10, and the first side face 4 and the inner flap 8 are cut. Thereby, the 1st side part 4 (and inner flap 8) is divided into two up and down. Furthermore, the second side surface portion 5 (and the inner flap 8) is divided into upper and lower portions by similarly cutting the second side surface portion 5 using the unsealing mechanism S. Thus, the packaging box X can be divided into two in the vertical direction, and the lower side of the bisected packaging box X can be used as a tray.

  In this unsealing mechanism S, the positions in the height direction H of the transverse cutting line outer ends 12b, 12b, 13b, 13b and the corresponding tearing line inner ends 21a, 21a, 22a, 22a are substantially the same. And the separation width between the cut-out pieces 10, 10 and the corresponding tear bands 20, 20 is set as a separation width (predetermined distance D) which is not too long. The cutting direction of the two side faces 4 and 5 kept from the transverse cutting line ends 12b, 12b, 13b and 13b of the cut pieces 10 and 10 toward the tearing line inner ends 21a, 21a, 22a and 22a As it is, the first and second side portions 4, 5 are easily cut to the tear line inner end portions 21a, 21a, 22a, 22a. Then, by making the tear lines 21 and 22 pass through the front and back of the first and second side portions 4 and 5, the first and second The two side portions 4 and 5 can be cut, and the force required therefor can be reduced. Thereby, half-traying can be performed easily and accurately.

  As described above, according to the corrugated cardboard blank sheet 1 having the opening mechanism S, half-traying can be easily and accurately performed. Moreover, half traying can not be performed smoothly by this, but various problems which deflection arises in the packaging box X which the appearance worsened and trayed due to the cutting edge by the opening mechanism S becoming a distorted shape Can be effectively suppressed.

Second Embodiment
A second embodiment of a cardboard blank sheet and a packaging box according to the present invention will be described with reference to the drawings. In the present embodiment, the shape of the cut-out pieces 10, 10 in the unsealing mechanism S and the length of the tear bands 20, 20 in the transverse direction L are different from those in the first embodiment. Hereinafter, differences between the corrugated cardboard blank sheet 1 according to the present embodiment and the first embodiment will be mainly described. In addition, about the point which does not specify in particular, it is the same as that of 1st Embodiment, attaches | subjects the same code | symbol, and abbreviate | omits detailed description.

  As shown in FIG. 5, in the corrugated cardboard blank sheet 1 according to the present embodiment, the longitudinal cutting line 11 in the cut-out pieces 10, 10 is longer on the top surface 2 side than in the first embodiment. Along with this, the horizontal cutting lines 12, 12 on the top surface 2 side are inclined downward toward the outside in the lateral direction L. Thereby, the shape of a pair of cut-out piece parts 10 and 10 in the top | upper surface part 2 side becomes mountain shape. Note that, unlike the first embodiment, the transverse cutting lines 12 and 12 are oblique in the present embodiment, but the transverse cutting line outer end 12b, and the like in the first embodiment as in the first embodiment. The positions 12b and the corresponding tear line inner ends 21a and 21a in the height direction H are substantially the same.

  Further, in the present embodiment, the pair of tear bands 20, 20 does not extend to both end positions 4a, 5a of the first and second side portions 4, 5, but at least the first and second side portions 4, 5 The center positions 4b and 5b in the lateral direction L and the end positions 4a and 5a in the lateral direction L respectively extend to positions on the central position side in the lateral direction L than intermediate positions 4c and 5c.

  Thus, the half tray of the packaging box X can be easily and accurately performed up to the intermediate positions 4c and 5c. Further, the shape of the cutting edge at least at the central portion of the packaging box X can be a shape along the tear line 22 without being a distorted shape. This makes it possible to make the shape of the cutting edge in the central portion where the specific gravity is large in appearance in appearance after half-traying. Also, when carrying the trayed packaging box X, if the cutting edge is uneven at the central portion, it is particularly likely to be bent, but the shape of the cutting edge at the central portion is along the tear line 22 Because of their shape, the problem of deflection that can occur in trayed packaging boxes is suppressed.

Other Embodiments
Finally, other embodiments of the cardboard blank sheet and the packaging box will be described. The configurations disclosed in each of the following embodiments can be applied in combination with the configurations disclosed in the other embodiments as long as no contradiction arises.

(1) The shapes of the cut-out pieces 10, 10 in the opening mechanism S are not limited to those shown in the above embodiment. For example, as shown in FIG. 6, the horizontal cutting lines 12 and 12 on the top surface 2 side are inclined downward toward the outside in the horizontal direction L, and the horizontal cutting lines 13 and 13 on the bottom surface 3 side are The pair of cut-out pieces 10, 10 may be formed in a mountain shape on both the top surface 2 side and the bottom surface 3 side, assuming that they are inclined upward toward the outer side in the lateral direction L. Further, conversely, as shown in FIG. 7, the horizontal cutting lines 12, 12 on the top surface 2 side are inclined upward as going to the outside of the horizontal direction L, and the horizontal cutting line 13 on the bottom surface 3 side , 13 are inclined downward toward the outside in the lateral direction L, even if the pair of cut-out pieces 10, 10 have a valley shape on both the top surface 2 side and the bottom surface 3 side. good. And in any case, the lateral cutting line outer end 12b, 12b, 13b, 13b and the corresponding tearing line inner end 21a, 21a, 22a, 22a, the position in the height direction H Should be approximately the same.

(2) In the above embodiment, the positions in the height direction H of the transverse cutting lines 12, 12, 13, 13 and the corresponding tearing lines 21, 21, 22, 22 are substantially the same. The arrangement in which the discontinuous spaces 30, 30 are provided between the cutout pieces 10, 10 and the corresponding tear bands 20, 20 in the lateral direction L has been described as an example. However, embodiments of the present invention are not limited thereto. For example, as shown in FIGS. 8A and 8B, in the lateral direction L, the cut-out pieces 10 and 10 and the corresponding tear bands 20 and 20 may not be separated. Further, as shown in FIG. 8A, the width between the tearing lines 21 and 22 is increased, and the tearing lines 21, 21, 22, 22 correspond to the corresponding transverse cutting lines 12, 12, 13, 13 may be disposed at the outer position in the height direction H, as shown in FIG. 8B, the width between the tearing lines 21 and 22 may be narrowed to form the tearing line 21, 21, 22 and 22 may be disposed at an inner position in the height direction H with respect to the corresponding transverse cutting lines 12, 12, 13 and 13. When the width between the tearing lines 21 and 22 is changed, the width between the tearing lines 21 and 22 is half or more of the width between the transverse cutting lines 12 and 13, It is suitable that it is 1/2 or less of the height of five.

(3) In the above embodiment, the configuration in which the tear lines 21 and 22 are straight lines parallel to the lateral direction L has been described as an example. However, embodiments of the present invention are not limited thereto. For example, a wavy line or a sawtooth line may be used. Also, the two tearing lines 21 and 22 that define the tearing bands 20 may not be parallel to each other, and the width of the two tearing lines 21 and 22 may expand as the lateral direction L is directed outward. You may line up in the narrowing state.

(4) In said embodiment, the structure which provided the opening mechanism S in the 1st side part 4 and the 2nd side part 5 was demonstrated to the example. However, embodiments of the present invention are not limited thereto. For example, the unsealing mechanism S may be provided only on the first side surface 4 or only on the second side surface 5.

(5) In the above-described first embodiment, a configuration in which the pair of tear bands 20 and 20 extend to both end positions 4a and 5a in the longitudinal direction L of the first and second side portions 4 and 5 will be described as an example In the second embodiment described above, although the pair of tear bands 20, 20 does not extend to both end positions 4a, 5a of the first and second side portions 4, 5, the first and second side portions 4, 5 The structure which extended to the position by the side of the center positions 4b and 5b in the horizontal direction L rather than the middle positions 4c and 5c was demonstrated to the example. However, embodiments of the present invention are not limited thereto. For example, the pair of cutout pieces 10, 10 having the shape shown in the first embodiment does not extend to both end positions 4a, 5a of the first and second side face parts 4, 5, but the first and second The pair of tear bands 20, 20 may be combined, each extending to a position closer to the center position 4b, 5b in the lateral direction L than the middle position 4c, 5c of the side portions 4, 5, the shape shown in the second embodiment The pair of cut strips 10, 10 may be combined with a pair of tear strips 20, 20 extending to both end positions 4a, 5a in the longitudinal direction L of the first and second side faces 4, 5, respectively. In the first or second embodiment, the pair of tear bands 20, 20 does not extend to both end positions 4a, 5a of the first and second side portions 4, 5, but the first and second side portions It may be extended to a position outside in the lateral direction L from the middle positions 4c and 5c of 4 and 5 respectively. In addition, the tear band 20 may not be provided on the entire area of the inner flap 8 in the lateral direction H, but may be provided on a part thereof.

(6) With regard to other configurations, it should be understood that the embodiments disclosed herein are illustrative in all respects, and the scope of the present invention is not limited by them. Those skilled in the art will easily understand that appropriate modifications can be made without departing from the spirit of the present invention. Therefore, other embodiments modified within the scope of the present invention are naturally included in the scope of the present invention.

  The present invention can be applied to, for example, a packaging box for containing beverage cans and the like, and a corrugated board blank sheet for forming the same.

1 Corrugated cardboard blank sheet 2 top surface portion 3 bottom surface portions 4 and 5 side surface portions (first side surface, second side surface)
4a, 5a End position 4b, 5b Center position 4c, 5c Middle position 10 Cut-out piece 11 Longitudinal cutting line 12, 13 Horizontal cutting line 12b, 13b Outer end 20 Cut band 21, 22 Cut line 21a, 22a Inner end D Prescribed interval L Horizontal direction H Height direction X Packaging box

Claims (5)

A corrugated cardboard blank sheet comprising a top surface portion which is a top surface when assembled as a packaging box, a bottom surface portion which is also a bottom surface, and a side surface portion which is also a side surface,
At least one of said side parts,
When it is a cutting line which penetrates the front and back of the above-mentioned side part, and is assembled as the above-mentioned packing box to a longitudinal cutting line which meets height direction when assembled as the above-mentioned packing box, and the above-mentioned longitudinal cutting line A pair of cut-out pieces disposed two on each side in the lateral direction and respectively defined by transverse cutting lines extending outward in the lateral direction;
A pair of transversely arranged broken lines extending through the front and back of the side portion, the pair being disposed on the outside in the lateral direction of each of the pair of cutout pieces. A tear band is formed ,
Each of the cut-out pieces and the tear-off bands corresponding to the cut-out pieces are formed at predetermined intervals longer than the broken line intervals of the cut lines at least in the lateral direction and shorter than the transverse cut lines cardboard blank sheet being. The lateral ends of the transverse cutting lines in the pair of cutout pieces and the lateral ends of the tearing lines corresponding to the transverse cutting lines have their respective heights. The corrugated cardboard blank sheet according to claim 1, which is disposed in a state where positions in the longitudinal direction are substantially the same. The pair of tear bands extend to a position closer to the central position in the lateral direction than a position intermediate at least between the central position in the lateral direction and the both end positions in the lateral direction of the side surface portions. The corrugated sheet blank sheet according to Item 1 or 2 . Cardboard blank sheet of a pair of the switching Fracture Zone placing serial to claim 3 respectively extending to said end positions of the side surface portion. A packaging box formed by assembling the corrugated cardboard blank sheet according to any one of claims 1 to 4 .

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