JP2019094075A - Corrugated fiberboard case - Google Patents

Abstract

To provide a corrugated fiberboard case enabling easily and rapidly opening the corrugated fiberboard case, and increasing strength of a surface with a notch part while keeping easiness of opening.SOLUTION: A top face panel 1 has a first notch part 26, a second notch part 27, and a third notch part 28. The first notch part 26 is cut in a dotted line shape, in a nearly circular arc curve line shape of connecting both end parts of two long side parts 1x of the top face panel 1. The second notch part 27 is cut in a dotted line shape, in a nearly wavy shape of connecting apex parts of the first notch part 26. The third notch parts 28 is arranged in both end parts of the second notch part 27, extends to the outside of the first notch part 26, and is cut in a dotted line shape, in a nearly semicircular shape.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cardboard case in which a top panel, a front panel, a bottom panel and / or a rear panel are cut and opened.

  Conventionally, for example, a cardboard case for storing products such as plastic bottles, cans, and glass bottles has a plurality of rectangular flat panels, for example, a top panel, a front panel, a bottom panel, and a back panel, and these panels It is created in a side-by-side expanded shape. In addition, side flaps are provided on both sides of each panel. Then, at the time of boxing of goods, the cardboard case of the expanded shape can be assembled into a rectangular parallelepiped cylindrical shape by bending inward along the folding line of each boundary portion between the top panel, front panel, bottom panel and back panel. . Furthermore, the side panels are formed by bending the side flaps on both sides of each panel inward along the folding lines of the respective boundary portions with each panel, and the side panels are formed and glued.

  In addition, there is a case in which a cut such as a perforation is made in advance in a panel, a flap or the like and a cut for opening is processed. In this case, at the time of taking out the boxed product, the cardboard case is opened by cutting the panel surface from the cut such as the perforation for opening, and the product is taken out.

JP 2007-204056 A JP 2005-104549 A

  As a corrugated cardboard case which has been subjected to processing for opening, there is a case in which a cut formed in the top panel has been conventionally formed by a combination of linear perforations. In this case, the openability of the cardboard case is easy.

  However, in the case where the shape of the cut is formed by a combination of straight lines, the portion of the cut of the perforation formed in the top panel, for example, the bend angle of the cut or the joint of a plurality of straight perforations. There is a surface that is slightly weak in strength when loaded. For example, at the time of storage of goods in a warehouse, at the time of conveyance of goods, etc., a plurality of corrugated cardboard cases may be stacked in multiple stages in the vertical direction. As described above, when a plurality of cardboard cases are loaded or when loading and unloading, a large load acts on the lower cardboard case. In such a case, the cut portion of the top panel formed by the combination of linear perforations may be cut, and the cardboard case may be easily opened unnecessarily.

  The present invention was made in view of the above circumstances, and the object is to open the cardboard case easily and quickly, and to increase the strength of the surface with the cut portion while leaving the ease of opening as it is. It is in providing a cardboard case that can be.

An embodiment of one aspect of the present invention is a cardboard case having a top panel, a front panel, a bottom panel, and a back panel, and provided with side flaps on both sides of each of these panels. The respective boundary portions between the top panel, the front panel, the bottom panel, and the back panel are respectively bent inward to be assembled into a rectangular parallelepiped cylindrical shape. Furthermore, a side panel is formed by bending the side flaps on both sides of each panel inward. At least one panel of the top panel, the front panel, the bottom panel, and the back panel has a first cut, a second cut, and a third cut. The first cut portion is cut in a dotted line shape in a substantially arc-like curved shape connecting both end portions to two long sides of the panel. The second incision is incised in a dotted line in a substantially corrugated shape connecting the tops of the first incision. The third incisions are respectively disposed at both ends of the second incision, extend outside the first incision, and are incised in a substantially semicircular shape in a dotted line.
Thus, when a large load acts on the lower cardboard case when a plurality of cardboard cases are loaded, the load acting on at least one of the top panel, the front panel, the bottom panel and the back panel. To reduce the risk of concentrated loads on one incised part. As a result, it is possible to increase the strength of the entire surface of the top panel, the front panel, the bottom panel, and at least one of the rear panels.

  According to the present invention, it is possible to provide a cardboard case which can be opened easily and quickly, and the strength of the surface on which the cut portion is inserted can be increased while maintaining the ease of opening. .

FIG. 1 is a plan view showing a developed state of the cardboard case of the first embodiment of the present invention. FIG. 2 is a plan view showing the top panel of the cardboard case of FIG. FIG. 3 is a perspective view showing an assembled state of the cardboard case of FIG. FIG. 4 is a perspective view showing the open state of the cardboard case of FIG. FIG. 5 is a perspective view showing a state in which goods are packed in the cardboard case of FIG. FIG. 6 is a plan view showing the developed state of the cardboard case of the second embodiment of the present invention. FIG. 7 is a plan view showing the developed state of the cardboard case of the third embodiment of the present invention. FIG. 8 is a plan view showing the developed state of the cardboard case of the fourth embodiment of the present invention. FIG. 9 is a plan view showing the developed state of the cardboard case of the fifth embodiment of the present invention. FIG. 10 is a plan view showing the developed state of the cardboard case of the sixth embodiment of the present invention. 11 is a plan view showing a state in which a portion XI of the cardboard case of FIG. 10 is enlarged. FIG. 12 is a plan view showing the main part of a first modified example of the cardboard case of the first embodiment. FIG. 13 is a plan view showing the main part of a second modification of the cardboard case of the first embodiment. FIG. 14 is a plan view showing the main parts of a third modification of the cardboard case of the first embodiment. FIG. 15 is a plan view showing the main part of a fourth modification of the cardboard case of the first embodiment. FIG. 16 is a plan view showing the main part of a fifth modification of the cardboard case of the first embodiment. FIG. 17 is a plan view showing the main part of a sixth modification of the cardboard case of the first embodiment.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a plan view showing a developed state of the cardboard case of the embodiment. FIG. 2 is a plan view showing the top panel of the cardboard case of FIG. FIG. 3 is a perspective view showing an assembled state of the cardboard case of FIG. FIG. 4 is a perspective view showing the open state of the cardboard case of FIG. FIG. 5 is a perspective view showing a state in which goods are packed in the cardboard case of FIG.

  As shown in FIG. 1, the cardboard case A of the present embodiment has four substantially rectangular (rectangular) panels that are connected horizontally in a flat state in the unfolded state: a top panel 1, a front panel 2, and a bottom panel. And a back panel 4. The top panel 1 is also referred to as a first surface, the front panel 2 as a second surface, the bottom panel 3 as a third surface, and the rear panel 4 as a fourth surface. On both sides of each of the panels 1 to 4, substantially rectangular side flaps 1a, 1b, 2a, 2b, 3a, 3b, 4a, 4b are respectively provided.

  Then, the top panel is bent inward along the bending lines of the long side portions 5, 6, 7 of the linear long sides 5, 6 and 7 which are the boundaries between the top panel 1, the front panel 2, the bottom panel 3 and the back panel 4. 1, the front panel 2, the bottom panel 3 and the back panel 4 are assembled in a rectangular parallelepiped tubular shape.

  Furthermore, in the present embodiment, the rear panel 4 is an elongated substantially rectangular bonding flap portion 8 for bonding with the top panel 1 at an end edge opposite to the long side portion 7 of the boundary with the bottom panel 3. Have. By bending the long side portion 9 at the boundary between the back panel 4 and the joining flap part 8 inward, the joining flap part 8 is joined to the top panel 1 with an adhesive or the like.

  Further, the side flaps 2 a and 2 b on both sides of the front panel 2 are bent inward at a right angle along the bending lines of the linear short side portions 10 and 11 which become the boundaries between the front panel 2. Thereby, the inner side wall portions 12 and 13 of the side panel are formed. Similarly, the side flaps 4 a, 4 b on both sides of the back panel 4 are bent inward at a right angle from the straight short side portions 14, 15 that form the boundary with the back panel 4. Thereby, the inner side wall portions 16 and 17 of the side panel are formed.

  The side flaps 1 a and 1 b on both sides of the top panel 1 are bent inward at a right angle from the straight short side portions 18 and 19 that form the boundary with the top panel 1. This forms the upper portions 20, 21 of the side panels. Similarly, the side flaps 3 a, 3 b on both sides of the bottom panel 3 are bent inward at a right angle from the straight short side portions 22, 23 that form the boundary with the bottom panel 3. Thereby, lower portions 24 and 25 of the side panels are formed.

  Therefore, in the present embodiment, the side panels are the inner side wall portions 16 and 17 by the side flaps 4a and 4b on both sides of the back panel 4 and the inner side wall portions 12 and 13 by the side flaps 2a and 2b on both sides of the front panel 2, respectively. It is formed. Further, upper side portions 20 and 21 of the side panel are formed by the side flaps 1a and 1b on both sides of the top panel 1, and lower side portions 24 and 25 of the side panel are formed by the side flaps 3a and 3b on both sides of the bottom panel 3. . A side panel on one side of the cardboard case A is formed by a combination of the four side flaps 4a, 2a, 1a and 3a on the left side in FIG. A side panel on the other side of the cardboard case A is formed by a combination of the four side flaps 4b, 2b, 1b and 3b on the right side in FIG.

  Further, as shown in FIG. 2, the top panel 1 has a plurality of incisions such as perforations for opening (two first incisions 26, one second incision 27, and two thirds). (Notched portion 28). The first cut portion 26 is a portion which is cut in a dotted line in a substantially arc-like curved shape connecting both end portions to two rectangular long side portions 1x constituting the outer shape of the top panel 1. The second cut portion 27 is a portion which is cut in a substantially corrugated shape in a dotted line shape at a linear connection portion connecting the top portions of the two first cut portions 26. The third notches 28 are respectively disposed at both ends of the second notches 27 and extend to the outside of the first notches 26 and are substantially semicircular and cut into dotted lines. The first cut 26, the second cut 27, and the third cut 28 may be, for example, an “L” shape, an “I” shape, a “Y” shape, or a “T” shape. Short incisions are formed by continuously formed perforations.

  Then, at the time of the opening work of the cardboard case A, the first cut portion 26, the second cut portion 27, and the third cut portion 28 of the top panel 1 are cut. Thereby, as shown in FIG. 4, the top panel 1 is separated into four cut pieces 29, 30, 31, 32. The top face of the cardboard case A is opened by opening the four cut pieces 29, 30, 31, 32 so as to bend outward.

  Top panel 1 has openings 33a and 33b for handle on side flaps 1a and 1b on both sides, respectively. In addition, the side flap 2a on the left side in FIG. 1 of the front panel 2 and the side flap 4b on the right side in FIG. 1 of the back panel 4 are openings that overlap with the openings 33a and 33b when assembling the side panels. The portions 34a and 34b are respectively formed.

  In the bottom panel 3, tongue-like central protrusions 35 a and 35 b protruding upward in FIG. 3 are formed at substantially central portions on the end edges of the side flaps 3 a and 3 b on both sides. In addition, the cut part 36 of a tape cut is formed in the approximate center area | region of the front panel 2 and the back panel 4. FIG. Furthermore, on the back surface of the sheet of the cardboard case A, a tape 37 for sheet cutting may be attached. In this case, it is possible to cut open the tape cut 36 and divide the box up and down to make a tray and display.

  Next, the operation of the above configuration will be described. The cardboard case A of the present embodiment is formed in the unfolded state shown in FIG. 1 before storing the product. And at the time of the accommodation operation | work of goods, etc., the operation | work which assembles the cardboard case A in the form of a rectangular parallelepiped is performed. At the time of assembling the cardboard case A, the inner sides along the fold lines of the long side portions 5, 6, 7 of the straight line which becomes each boundary of the top panel 1, the front panel 2, the bottom panel 3 and the back panel 4 respectively. Bent. Thereby, the top panel 1, the front panel 2, the bottom panel 3 and the back panel 4 are assembled in a rectangular parallelepiped cylindrical shape. Furthermore, the joining flap portion 8 is bent inward along the folding line of the long side portion 9 of the boundary with the back panel 4. In this state, the joining flap 8 is joined to the top panel 1 with an adhesive or the like.

  Subsequently, the side flaps 2 a and 2 b on both sides of the front panel 2 are bent inward at a right angle along the folding lines of the straight short side portions 10 and 11 serving as the boundary with the front panel 2. This forms the inner wall portions 12, 13 of the side panel. Similarly, the side flaps 4 a, 4 b on both sides of the back panel 4 are folded inward at a right angle along the fold lines of the straight short side portions 14, 15 that form the boundary with the back panel 4. This forms the inner side wall portions 16, 17 of the side panels.

  The side flaps 1 a and 1 b on both sides of the top panel 1 are bent inward at a right angle along the folding lines of the straight short side portions 18 and 19 that form the boundary with the top panel 1. This forms the upper portions 20, 21 of the side panels. Similarly, the side flaps 3 a, 3 b on both sides of the bottom panel 3 are bent inward at a right angle along the fold lines of the straight short side portions 22, 23 that form the boundary with the bottom panel 3. This forms the lower portions 24, 25 of the side panels. Thus, in the present embodiment, the side panel on one side of the cardboard case A is formed by the combination of the four side flaps 4a, 2a, 1a, 3a on the left side in FIG. Similarly, the combination of the four side flaps 4b, 2b, 1b and 3b on the right side in FIG. 1 forms a side panel on the other side of the cardboard case A.

  By the above-described bending operation of each panel, as shown in FIG. 3, the cardboard case A in the form of a rectangular parallelepiped is assembled.

  Further, at the time of the opening work of the cardboard case A in the form of a rectangular parallelepiped shown in FIG. 3 into which the product is boxed, first, a portion of the second cut 27 and a portion of the third cut 28 at the central position of the top panel 1 Is pushed downward (inside the cardboard case A) with fingers. At this time, the second cut portion 27 is cut into a substantially corrugated shape, and at the same time, the third cut portion 28 is cut into a substantially semicircular shape. Thereby, the wall plate portion of the peripheral edge of the second cut portion 27 is separated from the other wall plate portion of the top panel 1.

  Subsequently, the wall plate portions on both sides of the separated second notched portion 27 are grasped with fingers and pulled up in the upper direction of the cardboard case A. By this pulling operation, a part of the top panel 1 is cut and raised along the substantially arc-like curved shape of the two first notches 26. At this time, by cutting and raising the wall plate portions on both sides of the second cut portion 27 to the end positions of the two first cut portions 26, as shown in FIG. Two angled cutting pieces 29, 30 are formed. The two cut pieces 29 and 30 are held in a state of being bent to the outside of the top panel 1.

  Thereafter, the remaining portion of the top panel 1, that is, the outer portion of the two first notches 26 is pulled upward in the direction of the cardboard case A. By this pulling operation, two substantially mountain-shaped cut pieces 31 and 32 are formed. The two cutting pieces 31 and 32 are held in a state of being bent to the outside of the top panel 1. Thereby, all the parts of the top panel 1 are opened, and the upper surface opening of the cardboard case A is formed.

  Therefore, in the cardboard case A of the present embodiment configured as described above, the following effects can be obtained. That is, in the cardboard case A of the present embodiment, the top panel 1 is provided with the first cut portion 26, the second cut portion 27, and the third cut portion 28. Here, the first cut portion 26 has a structure in which a substantially arc-shaped curved shape connecting between both end portions is cut into a dotted line shape in two rectangular long sides forming the outer shape of the top panel 1. is there. The second cut portion 27 is a structure that is cut in a dotted line in a substantially corrugated shape that connects the top portions of the two first cut portions 26. The third incisions 28 are respectively disposed at both ends of the second incision 27, extend outside the first incision 26, and have a substantially semicircular shape and are incised in a dotted line shape. As described above, the perforations for opening are formed in the top panel 1 in a state in which the first incisions 26, the second incisions 27, and the third incisions 28 in a curved shape are combined, respectively. By this, it is possible to suppress the risk that the load is intensively applied to any one of the first cut portion 26, the second cut portion 27, and the third cut portion 28. it can. As a result, when a large load acts on the lower cardboard case A when a plurality of cardboard cases A are loaded, the load acting on the top panel 1 can be dispersed. As a result, the overall strength of the top panel 1 can be increased.

  In addition, when the cut portion of the top panel 1 is formed into an H shape by a combination of linear perforations, when a load is applied to the entire surface of the top panel 1, the center cut is easy to open . On the other hand, in the present embodiment, the first cut portion 26 has a substantially arc-shaped curvilinear shape and is cut into a dotted line shape, so there is no corner portion like the H shape. Therefore, it is possible to disperse the load applied to one point of the portion cut into the dotted line shape of the first cut portion 26.

  Furthermore, in the present embodiment, the shapes of the second cut portion 27 and the third cut portion 28 which are the cut portions of the top panel 1 are respectively curved. That is, the second incision 27 has a substantially corrugated shape connecting the apexes of the two first incisions 26 and is cut into a dotted line, and the third incision 28 is substantially half. It has a circular shape and is cut into a dotted line. As a result, when a load is applied to the entire surface of the top panel 1, it is possible to shift a point to which a load that tends to be concentrated at the apex of the arc of the first cut 26 is applied. Therefore, it is possible to prevent concentration on one point at the apex of the arc of the first incision 26.

  Furthermore, for example, when connecting the apexes of the two first notches 26 with straight notches, when a load is applied to the entire surface of the top panel 1, the load is concentrated on the straight notches and the center Cut easily. On the other hand, in the present embodiment, by forming the second notches 27 into a substantially wavy shape and incised in dotted lines, the incisions to be incised in dotted lines of the two first notches 26 are made. It can be distributed to the left and right of the straight line connecting the vertices.

  Further, in the present embodiment, the third cut portion 28 has a substantially semicircular shape and is cut into a dotted line. Thereby, when load is applied to the whole surface of top panel 1, it can prevent that load concentrates on the cut part of the peak part of the 1st cut part 26. FIG.

  Furthermore, when a load is applied to the entire surface of the top panel 1, a pulling force acts on the portions of the two cutting pieces 29, 30 outward. In the present embodiment, since the third incised portion 28 has a substantially semicircular shape, the above-described tensile force is applied to the surface in the vicinity of the connecting portion between the third incised portion 28 and the first incised portion 26. Can. Thereby, the load applied to the substantially wave-shaped cut end of the second cut portion 27 can be reduced compared to the case where the cut portion of the top panel 1 is formed into the H shape, and it is difficult to open it. .

  Furthermore, when the top panel 1 is opened, the first cut section 26, the second cut section 27, and the third cut section 28 are cut respectively, and the top panel 1 is cut into four cut pieces 29. , 30, 31 and 32 are separated. At this time, the cutting piece 29 is held in a state where it is connected to the side panel on one side of the cardboard case A, and the cutting piece 30 is connected to the side panel on the other side of the cardboard case A. The cutting piece 31 is held in a state where the front panel 2 of the cardboard case A and the cutting piece 32 are respectively connected to the back panel 4 of the cardboard case A. Therefore, the wall panel of the top panel 1 separated into the four cut pieces 29, 30, 31, 32 does not have a portion to be cut off and removed, thereby saving resources.

  In the above embodiment, the case of the rectangular parallelepiped shape is shown as an example of the cardboard case A. However, the cardboard case A is not limited to such a rectangular parallelepiped shape, and a rectangular parallelepiped or cube having a different shape from this. Of course, the present invention can be applied to cases such as shapes as appropriate.

  FIG. 6 is a plan view showing the developed state of the cardboard case of the second embodiment of the present invention. The present embodiment shows a cardboard case B of a wrap around inner sticking type. In FIG. 6, the same parts as those in FIGS. 1 to 5 are denoted by the same reference numerals, and the description thereof will be omitted.

  The cardboard case B of the present embodiment has an opening for the handle of the cardboard case A of the first embodiment in the side flaps 1a, 1b, 2a, 2b, 3a, 3b, 4a, 4b on both sides of each panel 1-4. The difference is that 33a, 33b, 34a, 34b are not provided. The other parts are the same as those of the cardboard case A of the first embodiment. Therefore, the same effects as those of the cardboard case A of the first embodiment can be obtained in this embodiment as well.

  FIG. 7 is a plan view showing the developed state of the cardboard case of the third embodiment of the present invention. The present embodiment shows a cardboard case C of a normal type A, such as a mandarin box. In FIG. 7, the same parts as those in FIGS. 1 to 5 are denoted by the same reference numerals, and the description thereof will be omitted.

  The corrugated board case C of the present embodiment has a first surface panel 41, a second surface panel 42, and a third surface panel 43 which are four substantially rectangular (rectangular) panels that are horizontally and horizontally connected in a flat state in the unfolded state. And the fourth surface panel 44. On both sides of each of the panels 41 to 44, substantially rectangular side flaps 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are provided.

  Then, along the fold lines of the long side portions 45, 46, 47 of the linear long sides which become the boundaries between the first surface panel 41, the second surface panel 42, the third surface panel 43, and the fourth surface panel 44, respectively. The first surface panel 41, the second surface panel 42, the third surface panel 43, and the fourth surface panel 44 are assembled in a tubular shape of a rectangular parallelepiped by bending.

  Furthermore, in the present embodiment, the first surface panel 41 is an elongated substantially rectangular shape for joining with the fourth surface panel 44 at an end edge opposite to the long side portion 45 at the boundary with the second surface panel 42. It has the flap part 48 for joining. By bending the long side portion 49 of the boundary between the first surface panel 41 and the bonding flap portion 48 inward, the bonding flap portion 48 is bonded to the fourth surface panel 44 with an adhesive or the like.

  Furthermore, linear short side portions 50, 51 at which the side flaps 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b on both sides of the respective panels 41 to 44 become boundaries between the respective panels 41 to 44, respectively. Is folded inward at a right angle along the folding line of A side panel on one side of the cardboard case C is formed by the combination of the upper four side flaps 41a, 42a, 43a, 44a in FIG. A side panel on the other side of the cardboard case C is formed by a combination of the lower four side flaps 41b, 42b, 43b, 44b in FIG.

  In the present embodiment, as shown in FIG. 7, notches (two first notches 26 and notches) such as a plurality of perforations for opening which are the same as the cardboard case A of the first embodiment in the third surface panel 43. One second incision 27 and two third incisions 28) are formed.

  Therefore, in the cardboard case C of the present embodiment, the two first notches 26 similar to the cardboard case A of the first embodiment, one second notch 27, and two of the third surface panels 43 are also included. Since the third cut portion 28 is formed, the same function and effect as the cardboard case A of the first embodiment can be obtained.

  FIG. 8 is a plan view showing the developed state of the cardboard case of the fourth embodiment of the present invention. This embodiment shows a cardboard case D of a wrap around outer sticking type. In FIG. 8, the same parts as those in FIGS. 1 to 5 are denoted by the same reference numerals, and the description thereof will be omitted.

  The corrugated board case D of the present embodiment has a first surface panel 61, a second surface panel 62, and a third surface panel 63, which are four substantially rectangular (rectangular) panels connected horizontally in a flat state in the unfolded state. And the fourth surface panel 64. On both sides of each of the panels 61 to 64, substantially rectangular side flaps 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b are provided.

  Then, along the fold lines of the long side portions 65, 66, and 67 of the linear long sides serving as boundaries between the first surface panel 61, the second surface panel 62, the third surface panel 63, and the fourth surface panel 64, respectively. The first surface panel 61, the second surface panel 62, the third surface panel 63, and the fourth surface panel 64 are assembled in a tubular shape of a rectangular parallelepiped by bending.

  Furthermore, in the present embodiment, the first surface panel 61 is an elongated substantially rectangular shape for joining with the fourth surface panel 64 at an end edge opposite to the long side portion 65 at the boundary with the second surface panel 62. It has a flap part 68 for joining. By bending the long side portion 69 of the boundary between the first surface panel 61 and the bonding flap portion 68 inward, the bonding flap portion 68 is bonded to the fourth surface panel 64 with an adhesive or the like.

  Furthermore, linear short side portions 70 and 71 at which the side flaps 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b on both sides of the panels 61 to 64 are the boundaries between the panels 61 to 64, respectively. Is folded inward at a right angle along the folding line of A side panel on one side of the cardboard case D is formed by the combination of the upper four side flaps 61a, 62a, 63a, 64a in FIG. A side panel on the other side of the cardboard case D is formed by the combination of the lower four side flaps 61b, 62b, 63b and 64b in FIG.

  In the present embodiment, as shown in FIG. 8, a plurality of incisions such as perforations for opening (the two first incisions 26 and the same as the cardboard case A of the first embodiment) are provided on the first surface panel 61. One second incision 27 and two third incisions 28) are formed.

  Therefore, in the cardboard case D of the present embodiment, the two first notches 26 similar to the cardboard case A of the first embodiment, one second notch 27, and two of the first surface panel 61 are also included. Since the third cut portion 28 is formed, the same function and effect as the cardboard case A of the first embodiment can be obtained.

  FIG. 9 is a plan view showing the developed state of the cardboard case of the fifth embodiment of the present invention. This embodiment shows a cardboard case E of a wrap around outer sticking type. The cardboard case E of the present embodiment is a modification of the cardboard case D of the fourth embodiment (see FIG. 8). In FIG. 9, the same parts as those in FIG. 8 are indicated by the same reference numerals and the explanation thereof will be omitted.

  In the cardboard case E of the present embodiment, the first surface panel 61 is formed of a flat panel without a cut portion. Then, in the third surface panel 63 of the cardboard case D of the fourth embodiment, a plurality of incisions (two first incisions 26) such as a plurality of perforations for opening that are the same as the cardboard case A of the first embodiment And one second incision 27 and two third incisions 28) are formed. The other parts are substantially the same as those of the cardboard case D of the fourth embodiment.

  Therefore, in the cardboard case E of the present embodiment, the two first notches 26 similar to the cardboard case A of the first embodiment, one second notch 27, and two of the third surface panel 63 are used. Since the third cut portion 28 is formed, the same function and effect as the cardboard case A of the first embodiment can be obtained.

  10 and 11 show a sixth embodiment of the present invention. FIG. 10 is a plan view showing the developed state of the cardboard case of the present embodiment. 11 is a plan view showing a state in which a portion XI of the cardboard case of FIG. 10 is enlarged.

  The cardboard case F of this embodiment is a modification of the cardboard case B (see FIG. 6) of the second embodiment. In FIGS. 10 and 11, the same parts as in FIG. 6 will be assigned the same reference numerals and explanations thereof will be omitted.

  In the cardboard case F of the present embodiment, the shape of the cut portion of the top panel 1 is changed to the cardboard case A of the first embodiment and the cardboard case B of the second embodiment.

  That is, in the cardboard case F of the present embodiment, the shape of the first cut portion 26 of the top panel 1 is changed to the first cut portion 81 of the wave-shaped arc type. The first cut portion 81 is a wave having a substantially arc-like curved shape connecting both end portions to the two rectangular long side portions 1x constituting the outer shape of the top panel 1 as a wave. It is formed in a mold. Furthermore, as shown in FIG. 11, the first cut portion 81 is formed by a cut line in which a short “Y” -shaped cut 81 a is continuously formed.

  In the cardboard case F of the present embodiment, the shape of the first cut portion 26 of the top panel 1 is changed to the first cut portion 81 of the wave-shaped arc type, and as shown in FIG. A short cut 81a was formed by a continuously formed score line. Therefore, compared with the cardboard case A of the first embodiment, the load acting on the top panel 1 can be dispersed further. As a result, the overall strength of the top panel 1 can be increased.

  Moreover, following FIGS. 12-17 shows the modification which changed the shape of the part of the opening of the top | upper surface panel 1 of corrugated-card-case A of 1st Embodiment, respectively. 12 to FIG. 17, the same parts as in FIG. 1 to FIG.

  FIG. 12 is a plan view showing the main part of a first modification of the cardboard case A of the first embodiment. In this modification, two different shaped notches (a first central notch 91 and a different notch are formed in the notch connecting the tops of the two first notches 26 which become the opening of the top panel 1). A second central incision 92) is provided.

  The first central cut portion 91 is a combination of a large diameter semicircular first portion 91 a and a small diameter tongue piece (semicircular) shaped second portion 91 b. The second portion 91 b is connected to the semicircular apex portion of the first portion 91 a.

  The second central incision 92 is a curved surface connecting the apexes of the two first incisions 26, and the second central incision 92 has a first central incision 91 in the central part of the second central incision 92. It is formed in the shape which the front-end | tip of 2 part 91b bites.

In this modification, at the time of the opening operation of the cardboard case A, only the second portion 91b of the first central cut portion 91 is pushed in, the second central cut portion 92 is grasped from the gap, and the cut piece 29 is flipped up. Thereafter, the second portion 91 b and the first portion 91 a are grasped and pulled upward to open the substantially mountain-shaped one of the cut pieces 30 between the first notches 26 in a form such as turning up. Thereafter, the remaining portion of the top panel 1, that is, the outer portion of the two first notches 26 is pulled upward in the direction of the cardboard case A. By this pulling operation, two substantially mountain-shaped cut pieces 31 and 32 are formed. The two cutting pieces 31 and 32 are held in a state of being bent to the outside of the top panel 1. Thereby, all the parts of the top panel 1 are opened, and the upper surface opening of the cardboard case A is formed.
First, push in the second central incision 92, grasp the second part 91b that has jumped a little, and pull it up to turn up one of the substantially mountain-shaped cut pieces 30 between the first incisions 26. It can also be opened in a form. In this case, subsequently, the other cut piece 29 is flipped up from the second central incision 92 using the space portion of the top panel 1 formed by the turning up of the one cut piece 30 to open it. Do.

  So, in this modification, at the time of opening work of corrugated cardboard case A, only the small area part of the 2nd portion 91b of the 1st central incision 91 should be pushed in. Therefore, for example, even when the contents of the cardboard case A are full and there is little space available (when the contents support the box to a certain extent), the opening operation can be easily performed.

  FIG. 13 is a plan view showing the main part of a second modified example of the cardboard case A of the first embodiment. In this modification, the shape of the first central cut portion 91 of the above-described first modification (see FIG. 12) is further modified. That is, in the present modification, the first central cut portion 101 having a large diameter semicircular shape in the cut portion connecting the apex portions of the two first cut portions 26 serving as the opening portion of the top panel 1. Is provided. A second portion 102 having a small diameter tongue piece (semicircle) shape is provided in a substantially central portion of the first central cut portion 101.

Then, at the time of the opening operation of the cardboard case A, only the second portion 102 of the first central incision 101 is pushed in. Thereafter, the space between the second portion 102 and the first central incision 101 is directed upward in the cardboard case A using the space portion of the top panel 1 formed by the pressing of the second portion 102. Pull up. By this pulling operation,
By turning up one of the cut pieces 30 from the first central incision 101, it is opened. Thereafter, the other cutting piece 29 is turned up using the space portion of the top panel 1 formed by the turning up of the one cutting piece 30 to open it.

  After that, the remaining portion of the top panel 1, that is, the portions of the two cutting pieces 31 and 32 outside the two first notches 26 are pulled up by the same operation as the first modification described above. Thereby, all the parts of the top panel 1 are opened, and the upper surface opening of the cardboard case A is formed.

  FIG. 14: is a top view which shows the principal part of the 3rd modification of corrugated-card-board case A of 1st Embodiment. In this modification, the shape of the first central cutout 101 in the second modification (see FIG. 13) is further modified. That is, in this modification, instead of the second portion 102 of the first central cut portion 101 of the second modified example, a convex portion 103 protruding toward the other cutting piece 29 at the tip of the first central cut portion 101. Is provided.

  Then, at the time of the opening work of the cardboard case A, only the convex portion 103 of the first central cut portion 101 is pushed in. Thereafter, by utilizing the space portion of the top panel 1 formed by pressing the convex portion 103, the portion of the first central cut portion 101 is pulled up in the upper direction of the cardboard case A. By pulling up one of the cut pieces 30 from the first central incision 101 by this pulling operation, the sheet is unsealed. After that, as in the second modification, the other cutting piece 29 is opened by using the space portion of the top panel 1 formed by turning up the one cutting piece 30.

  Subsequently, the remaining portion of the top panel 1, that is, the portions of the two cutting pieces 31 and 32 outside the two first notches 26 are pulled up by the same operation as in the first modification described above. Thereby, all the parts of the top panel 1 are opened, and the upper surface opening of the cardboard case A is formed.

  FIG. 15 is a plan view showing the main part of a fourth modified example of the cardboard case A of the first embodiment. In this modification, a V-shaped central cut portion 111 is provided in a cut portion connecting the apexes of the two first cut portions 26 serving as the open portion of the top panel 1, and two central cut portions A straight central cut connection portion 112 connects the portions 111.

  Then, at the time of the opening work of the cardboard case A, the peripheral portion of the central incision connecting portion 112 is pushed in. Then, it unseals by flipping up the two cutting pieces 29 and 30 using the space part of the top panel 1 formed by pushing of the peripheral part of the center incised connection part 112. As shown in FIG.

  After that, the remaining portion of the top panel 1, that is, the portions of the two cutting pieces 31 and 32 outside the two first notches 26 are pulled up by the same operation as the first modification described above. Thereby, all the parts of the top panel 1 are opened, and the upper surface opening of the cardboard case A is formed.

  FIG. 16 is a plan view showing the main part of a fifth modification of the cardboard case A of the first embodiment. In the present modification, the shape of the V-shaped central cut portion 111 of the fourth modification (see FIG. 15) is further modified. That is, in the present modification, in place of the V-shaped central cut portion 111 of the fourth modified example, a semicircular central cut portion 121 is provided. The other parts are identical to those of the fourth modification.

  FIG. 17 is a plan view showing the main part of a sixth modification of the cardboard case A of the first embodiment. In this modification, the top portions of the two first notches 26 which are the opening portions of the top panel 1 are connected by a straight central notch connecting portion 131. The other parts are identical to those of the fifth modification (see FIG. 16).

  Also in the second to sixth modified examples, the same function and effect as the first modified example can be obtained.

  The present invention is not limited to the above embodiment, and can be variously modified in the implementation stage without departing from the scope of the invention. In addition, the embodiments may be implemented in combination as appropriate, in which case the combined effect is obtained. Furthermore, various inventions are included in the above-described embodiment, and various inventions can be extracted by a combination selected from a plurality of disclosed configuration requirements. For example, even if some configuration requirements are deleted from all the configuration requirements shown in the embodiment, the problem can be solved, and if an effect is obtained, a configuration from which this configuration requirement is removed can be extracted as the invention.

  DESCRIPTION OF SYMBOLS 1 ... Top panel, 1a, 1b ... Side flap, 1x ... Long side part 2 ... Front panel, 2a, 2b ... Side flap, 3 .... Bottom panel, 3a, 3b ... Side flap, 4 ... Back panel, 4a, 4b: side flap, 5 to 7: long side portion, 8: joining flap portion, 9: long side portion, 10, 11: short side portion, 12, 13: inner side wall portion, 14, 15: short side portion, 16, 17 ... inner side wall portion 18, 18 ... short side portion, 20, 21 ... upper side portion, 22, 23 ... short side portion, 24, 25 ... lower side portion, 26 ... first cut portion, 27 ... first 2 notches, 28: third cuts, 29 to 32: cut pieces, 33a: openings, 33b: openings, 34a: openings, 34b: openings, 35a, 35b: central projection, 41: First surface panel, 42: second surface panel, 43: third surface panel, 44: fourth surface Nell, 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b ... side flaps, 45, 46, 47, 49 ... long side portions, 48 ... joining flap portions, 50, 51 ... short side portions, 61 ... First surface panel, 62: second surface panel, 63: third surface panel, 64: fourth surface panel, 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b: side flaps, 65, 66, 67 , 69: long side part, 68: flap part for joining, 70, 71: short side part, 81: cut part, 81a: cut part.

An embodiment of one aspect of the present invention is a cardboard case having a top panel, a front panel, a bottom panel, and a back panel, and provided with side flaps on both sides of each of these panels. The respective boundary portions between the top panel, the front panel, the bottom panel, and the back panel are respectively bent inward to be assembled into a rectangular parallelepiped cylindrical shape. Furthermore, a side panel is formed by bending the side flaps on both sides of each panel inward. At least one panel of the top panel, the front panel, the bottom panel, and the back panel has a first cut, a second cut, and a third cut. The first cut portion is a portion other than the central region of the first reference line along a substantially arc-shaped curvilinear first reference line connecting the both ends to two long sides of the panel. load the panel to distribute the load when acting Nde write cut into dotted line a. The second notch substantially waves a portion extending to the outside of the first reference line along a second reference line extending in the central region in a direction orthogonal to the long side. Nde write cut in the mold shape dotted line to distribute the load of the load to the panel by separating the cut portion of the panel to the left and right from the second reference line is applied.
The third incisions are respectively disposed at both ends of the second incision in the central region, and intermittently formed by being cut along a substantially semicircular third reference line in a dotted line. By connecting to the first cut portion, the load when the load acts on the panel is dispersed .
Thus, when a large load acts on the lower cardboard case when a plurality of cardboard cases are loaded, the load acting on at least one of the top panel, the front panel, the bottom panel and the back panel. To reduce the risk of concentrated loads on one incised part. As a result, it is possible to increase the strength of the entire surface of the top panel, the front panel, the bottom panel, and at least one of the rear panels.

Claims (6)

A top panel, a front panel, a bottom panel, and a back panel are provided, and side flaps are provided on both sides of each of these panels, and boundary portions between the top panel, the front panel, the bottom panel, and the back panel A corrugated board case in which the side panels are formed by bending inward each of the side flaps on both sides of the panels, respectively.
At least one panel of the top panel, the front panel, the bottom panel, and the back panel is a curved line having a substantially arc shape connecting both ends to two long sides of the panel in a dotted line shape A first cut that has been cut intermittently;
A second incision which is intermittently cut in a dotted line and has a substantially corrugated shape that connects the apexes of the first incision;
A third cut which is respectively disposed at both ends of the second cut and extends to the outside of the first cut and which has a substantially semicircular shape and is intermittently cut in a dotted line shape; Have a cardboard case.   The cardboard case according to claim 1, wherein the first cut portion, the second cut portion, and the third cut portion are formed in the top panel. The cardboard case according to claim 1 or 2, wherein the back panel has a joining flap part for joining to the top panel at an end edge opposite to a boundary part with the bottom panel. The top panel has a handle opening at the side flaps on both sides,
4. The opening according to claim 1, wherein the side flaps on both sides of the front panel and the side flaps on both sides of the back panel have openings overlapping with the openings when the side panels are assembled. The cardboard case described in any one of the items. The corrugated board case according to any one of claims 1 to 4, wherein the bottom panel is formed with a central protrusion at an end edge of the side flaps on both sides. The first incision, the second incision, and the third incision are notches, such as "L", "I", "Y", "T", or "straight". The corrugated cardboard case according to any one of claims 1 to 5, wherein is formed by a continuously formed piercing line.