JP6581534B2 - Opened cardboard box - Google Patents

Description

  The present invention relates to a top surface opening cardboard box that opens a top surface when a breaking line breaks when opening.

  In Patent Document 1 below, as shown in FIG. 11, an inner flap 63 and an outer flap 64 are connected to the upper ends of an end face plate 61 and a side face plate 62 that form each surface of the peripheral wall 51, respectively. In the corrugated cardboard box in which the outer flap 64 is overlapped and the tips of the outer flaps 64 are butted together to form a packaging state in which the top wall 52 is formed, the corrugated cardboard box is opened with the top surface opened.

  In this corrugated cardboard box, a handle portion 65 partitioned by a score line is provided on the upper portion of the end face plate 61, and reaches both side ends of the inner flap 63 along the boundary between the inner flap 63 and the end face plate 61 from the handle portion 65. A break line 71 and a break line 72 along the entire boundary length between the outer flap 64 and the side plate 62 are provided. The breaking lines 71 and 72 are engraved with a scissors-like cut that is intermittently connected to a ruled line pressed from the back side of the cardboard.

  In addition, at the four corners of the top wall 52, mountain folding auxiliary ruled lines 73 extending obliquely with respect to the breaking lines 71 and 72 are put on the inner flap 63 and the outer flap 64 so as to overlap each other. The mountain fold auxiliary crease line 73 is a lead crease in which a crease line pressed from the back side of the cardboard and a perforated cut are intermittent.

  When opening the cardboard box, the handle 65 is pushed in, the hand 65 is pushed and the top wall 52 is pulled upward to break the breaking lines 71 and 72, and the top wall 52 is moved by hand. It is removed together with the hanging portion 65. At this time, the ceiling wall 52 is bent so that the side of the handle 65 is lifted along the mountain folding auxiliary ruled line 73 of the inner flap 63 and the outer flap 64, and accordingly, the breaking lines 71 and 72 are continuously broken.

Registered Utility Model No. 3200716

  However, in the case of the cardboard box as described above, when the material corrugated cardboard is thick or the position of the mountain fold auxiliary ruled line 73 between the inner flap 63 and the outer flap 64 is shifted due to distortion during assembly, There is a problem that the resistance accompanying the pulling of 52 is large and it is difficult to break the breaking lines 71 and 72.

  In addition, when inserting a product into the box, the inner flap 63 and the outer flap 64 may be once bent outward so that the product does not interfere with the tips of the inner flap 63 and the outer flap 64. As a result, the corrugated cardboard may break at the positions of the break lines 71 and 72 where the tensile strength is reduced.

  Accordingly, the present invention provides a corrugated cardboard box made of corrugated cardboard of various thicknesses so that it can be easily opened by opening the top surface without requiring high accuracy for processing and assembly, and can be folded during packaging. Therefore, it is an object to prevent the cardboard from cracking.

  In order to solve the above-described problems, the present invention is configured such that an inner flap and an outer flap are connected to the upper ends of an end face plate and a side face plate forming a peripheral wall, respectively, and a handle portion is provided on the end face plate. A break line extending along the boundary between the face plate and the inner flap to both ends of the inner flap and a break line along the boundary between the side plate and the outer flap are entered, the outer flap is superimposed on the upper surface of the inner flap, and the tip of the outer flap In the top surface unsealed cardboard box where the top surface is opened, the top surface is opened by placing the hand on the handle and pulling the top wall upward to break the break line. The inner flap is provided with a weakened portion in which the bending strength of the corrugated cardboard in the mountain fold direction is lowered at a position corresponding to the abutting portion at the tip of the outer flap.

  Further, the inner flap and the outer flap are provided with reverse ruled lines that are recessed on the front side so as to be close to and parallel to the ridgeline that is bent as a boundary between the end face plate and the side face plate, respectively.

  Further, the breaking line extends on the edge line of the end face plate and the inner flap and the ridge line of the side face plate and the outer flap, and is not a ruled line where the cardboard is pressed, but many cuts penetrating the back surface and the front surface of the cardboard. They consisted of perforations.

  Then, a groove-like recess is formed in which the back side is recessed and the thickness of the cardboard is reduced so as to extend in parallel with the reverse ruled line interposed therebetween, and the break line is located within the range of the groove-like recess. It was.

  In the top surface opening corrugated cardboard box according to the present invention, since the weakened portion is provided in the inner flap so as to correspond to the abutting portion of the front end of the outer flap in the packaged state, the top wall is moved upward from the handle portion when opening. When pulled to the inner flap, the inner flap bends along the weakened portion without being blocked by the outer flap so that it can be folded in a mountain, and a force that efficiently tears the breaking line in the direction intersecting the direction in which the tensile force acts acts. As a result, the break line continuously breaks.

  For this reason, even if the material corrugated cardboard is thick, it can be easily opened, and if the weakened part has a certain width, the weakened part corresponds to the abutting part at the tip of the outer flap. High accuracy is not required.

  In addition, the inner flap and the outer flap are provided with reverse ruled lines so as to be close to and parallel to the ridgeline that is bent as the boundary between the end face plate and the side plate, respectively. Even if the outer flap is bent outward along the reverse ruled line, the cardboard is not broken at the position of the break line.

  Furthermore, since the break line is not a ruled line but a perforation in which a large number of cuts penetrating the back surface and the front surface of the corrugated cardboard are interrupted, when folding the inner flap and the outer flap inward to make a packaging state, The phenomenon that the cardboard breaks at the position of the breaking line is also prevented.

  In addition, since the breaking line is located within the range of the groove-like recesses on the back side extending in parallel with the reverse ruled line, the folding resistance of the inner flap and the outer flap is weakened, and when the packaging state is set, the inner flap And it becomes easy to bend an outer flap inside.

The reverse view which shows the blank of the top surface opening corrugated cardboard box which concerns on embodiment of this invention Sectional view along line II-II in Fig. 1 The perspective view which shows the state before bending of an upper inner flap and an outer flap at the time of an assembly same as the above. The perspective view which shows the bending state to the outer side of the upper inner flap and outer flap at the time of product insertion same as the above Sectional drawing along the VV line in FIG. 4 same as the above. The perspective view which shows a packaging state same as the above Sectional drawing along the VII-VII line in FIG. 6 same as the above. Perspective view showing the opening process Perspective view showing the opening process The perspective view which shows a top surface opening state same as the above. The perspective view which shows the opening process of the top surface opening cardboard box of patent document 1

  FIG. 1 shows a blank of a cardboard box according to an embodiment of the present invention. This cardboard box has a grooving shape called a so-called A type (JIS Z 1507 02 type). Corrugated cardboard, which is a blank material, has a structure in which a corrugated core C is sandwiched between a front liner A and a back liner B, and the step that is the direction in which the top of the core C extends extends in the vertical direction. It has been.

  In this blank, each pair of end face plates 11 and side face plates 12 forming the peripheral wall 1 are alternately provided in the lateral direction, and a passage piece 13 is provided continuously at the outer end of one side face plate 12. An inner flap 14 and an outer flap 15 that form the top wall 2 are connected to the upper ends of the pair of end face plates 11 and the side face plates 12, respectively, and the bottom ends of the pair of end face plates 11 and the side face plates 12 are bottoms. An inner flap 16 and an outer flap 17 that form the wall 3 are connected to each other.

  The pair of end face plates 11 are provided with a handle 18 that is defined by a score line so as to face an intermediate portion of the boundary with the upper inner flap 14, and a portion that faces the lower end intermediate portion of the handle 18. Is provided with a tongue-like push-in portion 19 having a fold line at the bottom as a hinge, with a cut line.

  The pair of inner flaps 14 is provided with a band-shaped weakened portion 20 at a position corresponding to the abutting portion at the tip of the outer flap 15 in the packaged state. The weakening portion 20 is configured to reduce the bending strength of the corrugated cardboard in the mountain fold direction by pressing the corrugated cardboard from the back side to crush the step of the core C.

  A break line 21 is provided at the boundary between the pair of end face plates 11 and the inner flap 14 thereabove from the handle portion 18 to both side ends. In addition, a break line 22 is provided at the boundary between the pair of side plates 12 and the outer flap 15 above the pair of side plates 12. The breaking lines 21 and 22 are not ruled lines on which the cardboard is pressed, but are formed by perforations in which a number of cuts penetrating the back and front surfaces of the cardboard are intermittent.

  Each pair of upper inner flap 14 and outer flap 15 has a surface side of the corrugated board so as to be close to and parallel to the break lines 21 and 22 along the ridge line that forms a boundary with the end face plate 11 and the side face plate 12, respectively. A reverse ruled line 23 in which is recessed is inserted.

  Here, at the boundary part between the end face plate 11 and the inner flap 14 and the boundary part between the side face plate 12 and the outer flap 15, as shown in FIG. 2, the back side is recessed so as to extend in parallel with the reverse ruled line 23 therebetween. Thus, a groove-shaped recess D having a reduced cardboard thickness is formed, and the breaking line 22 is located within the range of the groove-shaped recess D. The breaking line 21 is also located within the range of the groove-shaped recess D.

  Such boundary portion processing is performed by a slitter scorer of a corrugating machine and a perforation forming device added thereto.

  In the slitter scorer, a corrugated cardboard is sandwiched between a groove portion and a ridge portion of a pair of reverse crease rings, and a reverse crease line 23 is inserted by pressing from the surface side. A groove-like concave portion D is formed on the back surface side between the shoulder portions on both sides.

  Then, after the formation of the groove-shaped recess D, the corrugated board forming apparatus cuts the corrugated board from the back surface side with a disk-shaped knife within the range of the groove-shaped recess D, and puts the breaking lines 21, 22.

  As described above, when the groove-like recess D is formed in accordance with the processing of the reverse ruled line 23, when the perforated break lines 21, 22 are put in the range of the groove-like recess D, the break lines 21, 22 are joined to each other. The processing load accompanying the pressing of the cardboard does not act.

  In manufacturing, the blank as described above is flattened by folding along the ruled line at the boundary between the end face plate 11 and the side face plate 12 and pasting the passage piece 13 to the side end portion of the opposite end face plate 11. Keep it in a folded state.

  When packaging the product, as shown in FIG. 3, the rectangular cylindrical peripheral wall 1 is formed from each of the pair of end plate 11 and side plate 12, and the lower inner flap 16 and outer flap 17 are sequentially bent inward. The bottom wall 3 is formed by stacking, butting the tips of the outer flaps 17 together and fixing with the tape T or the like.

  Next, in order to avoid the interference between the product to be inserted and the tips of the upright inner flap 16 and the outer flap 17, as shown in FIG. 4, the inner flap 16 and the outer flap 17 are folded outward, Insert the product into the box.

  In this outward folding, as shown in FIG. 5, the corrugated cardboard is bent along the reverse ruled line 23 in which the surface side is crushed according to the characteristic that the core C is easily bent to the side crushed. The connecting portion 22 (the same applies to the breaking line 21) does not break.

  Thereafter, as shown in FIG. 6, the upper inner flap 14 and the outer flap 15 are sequentially folded inward and overlapped, the ends of the outer flap 15 are butted together, and fixed with a tape T or the like to form the top wall 2. Then, the sealed packaging state is obtained, and the product can be sent from the shipping source to the retail store.

  At the time of this inward folding, as shown in FIG. 7, the corrugated cardboard has a break line 22 (breakage in which the cut line penetrates from the back liner B to the front liner A and the inward bending resistance is weakened by the groove-shaped recess D. The line 21 is also easily bent along the same line).

  Further, as described above, since the pressing work load when the reverse ruled line 23 is inserted does not act on the connecting portion of the break lines 21 and 22, the inner flap 14 and the outer flap 15 are connected to the break lines 21 and 22, respectively. When bending along the inner side, the connecting portion on the front liner side of the corrugated cardboard is less likely to cause a sewing machine cracking phenomenon that breaks without being able to withstand the tensile force.

  When opening the sealed cardboard box for display of merchandise, etc., first, as shown in FIG. 8, the push-in portion 19 of one end face plate 11 is pushed in, and the hand-holding portion 18 is hooked. Then, while pulling up the overlapped portion of one inner flap 14 and outer flap 15 of the top wall 2, it is pulled in the direction of the end face plate 11 on the opposite side.

  At this time, in the corrugated cardboard box, the inner flap 14 bends along the weakened portion 20 so as to be mountain-folded without being obstructed by the outer flap 15, and the breaking line 21 intersects the direction in which the tensile force acts. The breaking line 21 breaks, and the breaking line 22 starts to break from one end.

  Next, as shown in FIG. 9, as described above, when the overlapping portion of the other inner flap 14 and the outer flap 15 of the top wall 2 is pulled up and pulled in the direction of the end face plate 11 on the opposite side, the inner flap 14 bends along the weakened portion 20 without being obstructed by the outer flap 15 so as to be mountain-folded, the breaking line 21 breaks, and subsequently, the breaking line 22 starts to break from the other end.

  Thus, when the weakened portion 20 of the inner flap 14 is provided at a position corresponding to the abutting portion at the tip of the outer flap 15 in the packaged state, it can be easily opened even if the cardboard made of material is thick. Even if the long side surface formed by the side plate 12 has a long shape, the top wall 2 is not bent so as to bend in the middle, and can be reliably opened.

  If the weakened portion 20 has a certain width, the weakened portion 20 corresponds to the abutting portion at the tip of the outer flap 15 even if a slight positional deviation occurs during blank processing or assembly. High accuracy is not required for assembly.

  Then, when the top wall 2 is removed together with the handle 18 after the breaking line 22 is broken over the entire length, as shown in FIG. 10, the top surface opens completely, so that the product remains stored in the box. It can be displayed in a state, and an excellent sales promotion effect can be obtained while saving labor in unpacking and display work at a retail store.

  In the above-described embodiment, the weakened portion 20 is exemplified by the step squeezing process. However, the weakened portion 20 is a group of cuts with finely cut blades or a crease line and a crushed process by pressing from the back side. As long as the processing is such that the bending strength of the corrugated cardboard is reduced and the mountain is easily folded, the processing can be performed in various ways.

  Moreover, although the thing in which the handle part 18 was each provided in a pair of end surface board 11 was illustrated, you may make it provide the handle part 18 only in one end surface board 11, and remove the top wall 2 at the time of opening. In this example, the entire top surface is opened, but only a part of the top wall 2 may be cut off when opened, or may be opened in a state where the top wall 2 is connected to the opposite side of the handle 18.

A Front liner B Back liner C Center core D Groove-shaped recess T Tape 1 Peripheral wall 2 Top wall 3 Bottom wall 11 End face plate 12 Side face plate 13 Passage piece 14 Inner flap 15 Outer flap 16 Inner flap 17 Outer flap 18 Handle 19 Pushing part 20 Weak parts 21, 22 Break line 23 Reverse ruled line

Claims (4)

An inner flap (14) and an outer flap (15) are connected to the upper ends of the end face plate (11) and the side face plate (12) forming the peripheral wall (1), respectively, and the hand plate (18 ), A break line (21) extending from the handle (18) along the boundary between the end plate (11) and the inner flap (14) to both ends of the inner flap (14), and the side plate (12) And a break line (22) along the boundary between the outer flap (15) and
The outer flap (15) is overlaid on the upper surface of the inner flap (14), the ends of the outer flap (15) are butted together, and the ceiling wall (2) is formed,
In the top-opening cardboard box where the top surface is opened, when the hand is placed on the handle (18) and the top wall (2) is pulled upward to break the break line (21, 22),
The inner flap (14) is provided with a weakened portion (20) that reduces the bending strength of the corrugated cardboard in the mountain fold direction at a position corresponding to the abutting portion at the tip of the outer flap (15). A top-opening cardboard box characterized by   In the inner flap (14) and the outer flap (15), reverse ruled lines whose surface side is recessed so as to be close to and parallel to the ridge line that is bent as a boundary between the end face plate (11) and the side face plate (12), respectively ( 23) The top surface unsealed cardboard box according to claim 1, wherein 23) is inserted.   The breaking line (21, 22) extends on the edge line of the end face plate (11) and the inner flap (14) and the edge line of the side face plate (12) and the outer flap (15), and is not a ruled line on which the cardboard is pressed. The top surface unsealed cardboard box according to claim 2, comprising a perforation in which a number of cuts penetrating the back and front surfaces of the cardboard are intermittent.   A groove-like recess (D) in which the thickness of the corrugated cardboard is reduced by extending the back side so as to extend in parallel across the reverse ruled line (23) is formed, and the break line (21, 22) is formed in the groove-like recess ( The top-surface unsealed cardboard box according to claim 3, which is located within the range of D).

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