JP2008127081A - Paper carton - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper carton which can be disassembled easily and quickly. <P>SOLUTION: The form of the paper carton is held by pressing both ends of piling pieces of front and back side plates with both ends of piling pieces of left and right side plates, wherein two or more gripping part forming cuts 41 secure a space in the width direction from the tip side part toward the lower side part of an inner side plate in the piling pieces of each front and back side plate and a portion between gripping part forming cuts 41 is a gripping part 25. When the carton is disassembled, the gripping part 25 is raised up by pressing to extend the upper sides of the front and back side plates and the pressure on the piling pieces of the front and back side plates is released by pulling up the gripping part 25 so that the carton can be disassembled. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a paper box, and more particularly to a paper box that can be easily disassembled.

  Conventionally, as shown in FIG. 16, each side plate is composed of an inner plate 122 and an outer plate 121 on opposite front and rear sides of a rectangular bottom plate 112 as a paper box 111 in which the inner plate and the outer plate are doubled. Front and rear side plates 113 are connected to each other, left and right side plates 114 made of an inner plate 132 and an outer plate 131 are connected to left and right sides of the bottom plate 112 facing each other. , 134 are connected to each other, and insertion flaps (not shown) are connected to both sides of the inner plate 132 of the left and right side plates 114, and the front and rear side plates 113 and the left and right side plates 114 are connected to the bottom plate 112. The insertion flap is sandwiched between the inner plate 122 and the outer plate 121 of the front and rear side plates 113, and both ends of the overlapping pieces 124 of the front and rear side plates 113 are connected to the left and right side plates 114. By being pressed by the both end portions of Gohen 134, paper box 111 the box form is held is generally known.

  When disassembling such a paper box 111, both ends of both ends of the overlapping pieces 134 of the left and right side plates 114 are bent while being bent so that the tip side portions of the overlapping pieces 124 of the front and rear side plates 113 are hooked with fingers. An operation for releasing the pressure on the superposed piece 124 is required by pulling it out.

  However, the overlapping pieces 124 of the front and rear side plates 113 are pressed against the bottom plate 112 because both ends thereof are pressed by the overlapping pieces 134 of the left and right side plates 114. For this reason, the front end side portion of the overlapping piece 124 of the front and rear side plates 113 is difficult to be caught by fingers, and it is difficult to hook the fingers on the fingers and pull them upward, and the paper box 111 is not easily disassembled.

  Therefore, conventionally, for the purpose of facilitating the release operation of the overlapping piece, a notch portion shorter than the width of the corresponding overlapping piece of the left and right side plates is provided on both lower sides of the inner plate of the front and rear side plates, and the width A paper box provided with a finger insertion hole at the lower end in the direction center has been developed (for example, see Patent Document 1). When disassembling, the paper box described in Patent Document 1 inserts fingers into the finger insertion holes to make it easier to grip the inner plate of the front and rear side plates, and by pulling the inner plate upward with fingers to bend the inner plate, It is intended to pull up the ends of the polymer pieces on the front and rear side plates from the ends of the polymer pieces on the left and right side plates.

According to the conventional paper box, when the tip of the finger is hooked in the finger insertion hole and the finger insertion hole is pulled up toward the center and upward of the paper box, the inner plate of the front and rear side plates flexes accordingly. The ends of the overlapping pieces on the side plates are pulled out from the ends of the overlapping pieces on the left and right side plates.
JP 2001-301743 A

  However, since the finger insertion hole of the conventional paper box is provided at the lower end portion of the inner plate of the front and rear side plates, it is difficult to hook the tip of the finger and the operation is difficult. In addition, an operation performed by hooking the tip of a finger on the finger insertion hole is difficult to apply force, for example, a difficult operation for a weak person, and it is difficult to disassemble the paper box.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a paper box that can be easily dismantled and can be quickly disassembled.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

That is, according to the first aspect of the present invention, front and rear side plates composed of an inner plate and an outer plate are connected to the front and rear sides of the square bottom plate, and the inner and outer plates are respectively connected to the left and right sides of the bottom plate. The left and right side plates are connected to each other, the overlapping pieces are connected to the lower side portions of the inner side plates, and the insertion flaps are connected to both side portions of the inner side plates of the left and right side plates. The front and rear side plates and the left and right side plates are erected, and the insertion flap is sandwiched between the inner and outer plates of the front and rear side plates, and both ends of the overlapping pieces of the front and rear side plates are superposed on the left and right side plates. A paper box in which the box form is held by pressing at either or both of both ends of the piece or the lower side of the left and right side plates,
A plurality of gripping portion forming notches are formed in the overlap pieces of the front and rear side plates from the front end side to the lower side portion of the inner side plate with a space in the width direction, and are sandwiched between the gripping portion forming cuts. A paper box with the gripped part as the gripping part.

  According to a second aspect of the present invention, in the first aspect, an inner plate bending crease line is formed on the inner plate of each of the front and rear side plates from the vicinity of the upper side toward the end of the grip forming slit. .

  According to a third aspect of the present invention, in the second aspect, the outer plate bending crease line is formed at a position substantially corresponding to the inner plate bending fold line in the outer plate of each of the front and rear side plates.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the gripping portion forming cut edge is formed on the inner plate of each of the front and rear side plates from the vicinity of both ends of the upper side portion of the inner plate. An end bending fold line is formed toward the vicinity of the portion.

  In the invention according to claim 5, in the invention according to any one of claims 1 to 4, the vicinity of the end adjacent to the grip forming slit is smooth at the tip side of the overlap piece of the front and rear side plates. It is formed in an arc shape.

  According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the rupture line is formed on a crease line interposed between both side portions of the inner plate of the left and right side plates and the insertion flap. A plurality of cuts and breakage connecting portions are arranged alternately.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect of the present invention, a plurality of gripping portion forming cuts are formed in the overlapping pieces of the front and rear side plates from the front end side portion to the lower side portion of the inner side plate with a space in the width direction. A portion sandwiched between the gripping portion forming cuts is a gripping portion. For this reason, when disassembling the paper box, if the upper side portion of the front and rear side plates is pushed outward in the paper box direction, the tip side portion of the gripping portion is raised upward in conjunction with this. When the gripping part is pulled up toward the center of the paper box and upward, both ends of the overlapping pieces of the front and rear side plates are bent, gradually pulled out from the pressed part by the left and right side plates, and finally completely pulled out. , The pressure is released. Therefore, when dismantling the paper box, if the upper sides of the front and rear side plates are pushed and expanded outwardly of the paper box, the gripping portion is caused, and by pulling up the gripping portion, both ends of the overlapping pieces of the front and rear side plates are Pressing is released. For this reason, the operation for dismantling the paper box is easy, and the dismantling of the paper box can be performed quickly.

  According to the paper box of the second aspect, the inner plate bending fold line is formed on the inner plate of each of the front and rear side plates from the upper side to the vicinity of the end of the grip forming slit. For this reason, when disassembling the paper box, if the upper side of the front and rear side plates is pushed outward in the direction of the paper box, the inner side plate of the front and rear side plates is easily bent along the inner plate bending fold line. Thus, the tip side portion of the gripping portion can be caused to rise greatly upward. Therefore, the gripping part is in a state where it is easy to grip, and the lifting operation is easy. In addition, since the tip side portion of the gripping portion is largely raised upward, it is easy to understand the portion to be gripped with fingers, and the operation for dismantling the paper box is easy to understand.

  According to the paper box of claim 3, in addition to the inner plate bending crease line, the outer plate bending crease line is located at a position substantially corresponding to the inner plate bending crease line on the outer plate of each front and rear side plate. Is formed. When disassembling the paper box, if the upper sides of the front and rear side plates are pushed outward, the inner plate of the front and rear side plates is easily bent along the inner plate bending fold line, and the outer side of the front and rear side plates The plate is easily bent along the outer plate bending fold line. For this reason, the operation of pushing the front and rear side plates outward of the paper box can be performed with a light operating force, and the operation for dismantling the paper box is easy.

  According to the invention described in claim 4, the end bending fold line is formed on the inner plate of each front and rear side plate from the vicinity of both ends of the upper side of the inner plate toward the end of the grip forming slit. Has been. Therefore, the inner plate is easy to bend along the edge bending fold line, and both end portions of the inner plate are easily bent and inclined toward the outside of the paper box along the end bending fold line. Yes. Therefore, as the gripping part is pulled up, both ends of the overlapping pieces of the front and rear side plates are easily inclined toward the outside of the paper box, and easily from both ends of the overlapping pieces of the left and right side plates or the pressing portions of the lower side portions of the left and right side plates. The pressure is released. Therefore, the paper box can be easily and quickly disassembled.

  According to the fifth aspect of the present invention, the vicinity of the end adjacent to the grip forming slit is formed in a smooth arc shape at the tip side of the overlap piece of the front and rear side plates. Therefore, when operating the gripping part to dismantle the paper box, both ends of the gripping part are formed in a smooth arc shape, which is gentle to the fingers and prevents the fingers from being damaged. Can improve the safety.

  According to the invention described in claim 6, a plurality of breaking cuts and breaking connecting portions are alternately arranged on a crease line interposed between both side portions of the inner plate of the left and right side plates and the insertion flap. Yes. For this reason, when the paper box is disassembled, if the upper side portions of the left and right side plates are pushed outward in the paper box, a force that breaks the breaking connecting portion acts and both sides of the inner plates of the left and right side plates Since the side portion and the insertion flap can be broken, the dismantling operation of the paper box can be started even from the left and right side plates.

  Next, embodiments of the invention will be described with reference to the drawings.

  A paper box according to a first embodiment of the present invention will be described with reference to FIGS.

  The paper box according to the first embodiment is formed by assembling the paper box development formed body shown in FIG. 1, and is used as a body box that is used with a cover lid. The paper box is formed of thick paper such as paperboard or cardboard. The bottom plate 12 of the paper box development formed body is a rectangular flat plate portion. In this embodiment, the bottom plate 12 is rectangular, but the bottom plate 12 may be square. Hereinafter, for the sake of explanation, the short side of the bottom plate 12 is defined as the front and rear sides, and the long side of the bottom plate 12 is defined as the left and right sides. Further, in the vertical direction, when the paper box 11 is assembled and placed with the bottom plate 12 facing down, the bottom plate 12 side is set downward and the opening side is set upward.

  First, front and rear side plates 13 each including a first inner side plate 22 and a first outer side plate 21 are connected to the front and rear sides of the bottom plate 12. A first outer plate 21 is connected to the front and rear sides of the bottom plate 12 via a fold line 51, and a first upper plate portion 23 is connected to the first outer plate 21 via a fold line 52. Then, the first inner plate 22 is connected to the first upper plate portion 23 through the crease line 53. Continuing from the first inner plate 22, the first overlapping piece 24 is connected to the lower side portion of the first inner plate 22 via a crease line 54. The lower side portion of the first inner plate 22 is a portion that becomes the lower side of the inner wall of the front and rear side plates 13 in a state where the paper box 11 is assembled.

  On the left and right sides of the bottom plate 12, left and right side plates 14 each including a second inner plate 32 and a second outer plate 31 are connected. A second outer plate 31 is connected to each of the left and right sides of the bottom plate 12 via a fold line 61, and a second upper plate portion 33 is connected to the second outer plate 31 via a fold line 62. Then, the second inner plate 32 is connected to the second upper plate portion 33 through the crease line 63. Continuing from the second inner plate 32, the second overlapping piece 34 is continuously provided on the lower side portion of the second inner plate 32 via a crease line 64. The lower side portion of the second inner plate 32 refers to a portion that becomes the lower side of the inner wall of the left and right side plates 14 when the paper box 11 is assembled. In addition, insertion flaps 35 are connected to both side portions of each of the second inner plates 32 via crease lines 65, respectively.

  The side portion of the first outer plate 21 and the side portion of the second outer plate 31 adjacent to the first outer plate 21 are connected by a connecting flap 36 via crease lines 55 and 66, respectively. The connecting flap 36 is formed with a crease line 67 in a diagonal direction. When the first outer plate 21 and the second outer plate 31 are erected with respect to the bottom plate 12, the connecting flap 36 is It is formed to be folded in half.

  Next, the grip part forming cut 41 formed in the first overlapping piece 24 and the grip part 25 formed thereby will be described. A plurality of the gripping portion forming cuts 41 are formed with a space from the tip side portion of the first overlapping piece 24 toward the lower side portion of the first inner plate 22. In the present embodiment, two gripping portion forming cuts 41 are formed in each first overlapping piece 24, and the first inner plate 22 and the first overlapping portion 41 are formed from the free end on the front end side of the first overlapping piece 24. It forms so that it may reach to the crease line 54 which is the connection part of the 1 superposition piece 24. The positions where the gripping portion forming cuts 41 are formed are substantially symmetrical positions with respect to the center portion in the width direction of the first overlapping piece 24, and the two holding portion forming cuts 41 are the width of the first overlapping piece 24. The distance between the first overlapping pieces 24 is narrow, and the distance between the first overlapping pieces 24 becomes wider toward the fold line 54 of the first inner plate 22. The two gripper forming cuts 41 are formed in a substantially C shape.

  Further, the portion sandwiched between the gripping portion forming cuts 41 is the gripping portion 25, which is a portion that is gripped and operated when the paper box 11 is disassembled. For this reason, the interval between the gripper forming cuts 41 is set so that the gripper 25 can secure a width that can be gripped with fingers. In addition, since the two gripping part forming cuts 41 are formed in a substantially C shape, the gripping part 25 is formed in a trapezoidal shape with the free end side narrowed. In this embodiment, the gripping portion forming cuts 41 are formed two by two, and the gripping portions 25 are formed one by one. However, the present invention is not limited to this. Three or more 41 may be formed, and two or more gripping portions 25 may be formed. In addition, the grip portion 25 has a trapezoidal shape, but is not limited thereto, and may have a rectangular shape or other shapes.

  Next, the case where the paper box 11 is assembled by the paper box development formed body will be described. As shown in FIG. 2, the front and rear side plates 13 and the left and right side plates 14 are bent at respective crease lines, and are erected with respect to the bottom plate 12. The first outer plate 21 and the second outer plate 31 are outer walls of the paper box 11, the first upper plate portion 23 and the second upper plate portion 33 are upper walls of the paper box 11, and the first inner plate 22 and the second inner plate 32. Becomes the inner wall of the paper box 11. At this time, the insertion flap 35 and the connecting flap 36 are sandwiched between the first outer plate 21 and the first inner plate 22 of the front and rear side plates 13. Then, the first polymerization piece 24 and the second polymerization piece 34 are bent along the bottom plate 12, and both ends of the first polymerization piece 24 are pressed by both ends of the second polymerization piece 34. Assemble to keep the box shape.

  Next, a procedure for dismantling the paper box 11 assembled as described above will be described. The following procedure is an example and is not limited to the following procedure. First, the paper box 11 is held with one hand. In this state, as shown in FIG. 3, the upper side portion of any one of the front and rear side plates 13 is pushed outward of the paper box 11 with the thumb of the other hand. As a result, the first inner side plate 22 of the front and rear side plate 13 that has been spread out is inclined outwardly of the paper box 11. In conjunction with this, the grip portion 25 is also inclined, and the tip side portion of the grip portion 25 is raised upward. At this time, both end portions of the first superposed piece 24 are divided from the gripping portion 25 by the gripping portion forming cuts 41, and thus are kept in an almost intact state without being pulled by the gripping portion 25.

  As shown in FIG. 3, when the tip side portion of the grip portion 25 is raised upward, it becomes easy to grip with a finger, so the grip portion 25 is gripped with, for example, a thumb and an index finger, and as shown in FIG. The grip portion 25 is pulled up toward the center of the paper box 11 and upward. When the grip portion 25 is pulled up, the first inner plate 22 of the front and rear side plates 13 is bent so as to swell in the center direction of the paper box 11, and the first overlapping piece 24 is pulled upward. At this time, since both end portions of the first superposition piece 24 are pressed by both end portions of the second superposition piece 34 of the left and right side plates 14, both end portions of the first superposition piece 24 are directed outward of the paper box 11. And bend to tilt. As the grip portion 25 is further pulled up, both end portions of the first superposed piece 24 are further bent and gradually pulled out from under both end portions of the second superposed piece 34, and finally as shown in FIG. Then, the second polymer piece 34 is completely pulled out from both end portions, and the pressing is released. Subsequently, by performing the same operation on the other front and rear side plates 13, both the pressing of the first overlapping pieces 24 of the left and right side plates 14 holding the box shape are released, so the paper box 11 is disassembled. Can do.

  According to the paper box 11 according to the first embodiment described above, when the paper box 11 is disassembled, if the upper side portion of the front and rear side plate 13 is pushed outward in the paper box 11, the grip portion 25 is caused, By pulling up the grip portion 25, the pressing of the first overlapping piece 24 of the front and rear side plates 13 is released. For this reason, the operation for disassembling the paper box 11 is easy, and the paper box 11 can be quickly disassembled.

  Next, a paper box 11 according to a second embodiment of the present invention will be described with reference to FIGS. The second embodiment is greatly different from the first embodiment in that the inner plate bending fold line 42 is formed on the front and rear side plates 13. Detailed description of the same parts as those in the first embodiment will be omitted.

  The paper box 11 according to the second embodiment is formed by assembling the paper box development formed body shown in FIG. As shown in FIG. 6, the inner plate bending crease line 42 is formed on the first inner plate 22 of each of the front and rear side plates 13 from the upper side portion to the vicinity of the end portion of the grip portion forming cut 41. In the present embodiment, the inner plate bending fold line 42 is a so-called perforation, and the first inner plate 22 and the first upper plate portion 23 are formed from the fold line 54 between the first inner plate 22 and the first overlapping piece 24. Is formed so as to reach the crease line 53. Further, the inner plate bending crease line 42 is widened toward the upper side of the first inner plate 22 from the vicinity of the end portion of the grip forming portion cut line 41 so as to be substantially C-shaped. Is formed. The inner plate bending crease line 42 secures an interval about the width of a finger at the upper side of the first inner plate 22 and is used for bending the inner plate when the fingers are hung on the upper side of the front and rear side plate 13. The crease line 42 is set to the side of the finger.

  The procedure for assembling the paper box 11 by the paper box development formed body is the same as that of the first embodiment, and detailed description thereof is omitted. Next, a procedure for disassembling the assembled paper box 11 will be described.

  First, as in the case of the first embodiment, the paper box 11 is held by one hand, and in this state, as shown in FIG. 11 is pushed outward. At this time, since the inner plate bending fold line 42 is formed in the paper box 11 of the second embodiment, the first inner plate 22 of the front and rear side plates 13 is easily bent along the inner plate bending fold line 42. The portion sandwiched between the inner plate bending fold lines 42 is greatly inclined outwardly from the paper box 11. Since the inner plate bending crease line 42 secures an interval about the width of the finger at the upper side of the first inner plate 22, the inner plate bending crease line 42 is outside the finger, and the finger is on the inner plate. The bending fold line 42 is not obstructed.

  Further, since the inner plate bending fold line 42 is formed near the end of the grip portion forming cut 41, the grip portion 25 is the inner plate bending fold line 42 of the first inner plate 22. It will be connected to the part sandwiched between. For this reason, when the portion sandwiched between the inner plate bending crease lines 42 is largely inclined outwardly of the paper box 11, the gripping portion 25 is interlocked with the inclined portion and the tip side of the gripping portion 25 is greatly upward. Can cause.

  When the tip side portion of the grip portion 25 is largely raised, the grip portion 25 is easily gripped, and the lifting operation can be easily performed. In addition, since the tip side portion of the grip portion 25 is largely raised, a portion to be gripped and operated by a finger can be easily understood, and an operation for disassembling the paper box 11 can be easily understood.

  Next, a paper box 11 according to a third embodiment of the present invention will be described with reference to FIGS. In the third embodiment, in addition to the inner plate bending fold line 42 of the second embodiment, the outer plate bending fold line 43 is formed on the first outer plate 21 of each of the front and rear side plates 13. It is very different. Detailed description of the same parts as those in the first and second embodiments will be omitted.

  The paper box 11 according to the third embodiment is formed by assembling the paper box development forming body shown in FIG. As shown in FIG. 9, the outer plate bending crease line 43 is formed on the first outer plate 21 of each front and rear side plate 13 at a position substantially corresponding to the inner plate bending fold line 42. The shape of the crease line 43 is substantially the same as that of the fold line 42 for bending the inner side plate. In the present embodiment, the outer plate bending fold line 43 is a so-called perforation, and the outer plate bending fold line 43 is formed from a fold line 51 between the bottom plate 12 and the first outer plate 21 as shown in FIG. The first outer plate 21 and the first upper plate portion 23 are formed so as to reach the crease line 52. The outer plate bending crease line 43 is formed to have a substantially C shape similar to the inner plate bending crease line 42.

  According to the paper box 11 according to the third embodiment, when the paper box 11 is disassembled, if the upper side of the front / rear side plate 13 is pushed outward in the paper box 11, the first inner plate 22 becomes the inner side as described above. Since the first outer plate 21 is easily bent along the outer plate bending fold line 43 in addition to the plate bending fold line 42, the front and rear side plates 13 are easily bent. . Therefore, the operation of pushing the front and rear side plates 13 outward of the paper box 11 can be performed with a light operating force, and the operation for disassembling the paper box 11 can be easily performed.

  Next, a paper box 11 according to a fourth embodiment of the present invention will be described with reference to FIGS. The fourth embodiment is largely different from the second embodiment in that end bending fold lines 44 are formed on the first inner plates 22 of the front and rear side plates 13. Detailed description of the same parts as those in the second embodiment will be omitted.

  The paper box 11 according to the fourth embodiment is formed by assembling the paper box development formed body shown in FIG. The end bending fold lines 44 are formed on the first inner plate 22 of each of the front and rear side plates 13 from the vicinity of both ends of the upper side portion of the first inner plate 22 toward the vicinity of the end portion of the grip forming slit 41. Is. In the present embodiment, the end bending fold line 44 is a so-called perforation, and is formed so as to reach the end of the grip portion forming cut 41 from both ends of the upper side of the first inner plate 22. . The end bending fold line 44 is formed so that the first inner plate 22 is easily bent when a force is applied to the lower side portion of the first inner plate 22.

  The procedure for assembling the paper box 11 by the paper box development formed body is the same as that of the first embodiment, and detailed description thereof is omitted. Next, a procedure for disassembling the assembled paper box 11 will be described.

  First, as in the case of the first embodiment, the paper box 11 is held with one hand, and in this state, the upper side of any one of the front and rear side plates 13 is pushed outward of the paper box 11 with the thumb of the other hand. Then, the tip side of the gripping part 25 is raised upward (see FIG. 3).

  Subsequently, as shown in FIG. 11, when the grip portion 25 is pulled up in the center direction and upward of the paper box 11, the central portion of the first inner plate 22 of the front and rear side plates 13 is accordingly in the center direction of the paper box 11. Bend to swell. At this time, both end portions of the first superposed piece 24 are pressed by both end portions of the second superposed piece 34 of the left and right side plates 14, and the both end portions of the first superposed piece 24 are directed outward of the paper box 11. A force acts to incline. On the other hand, since the end bending fold line 44 is formed on the first inner plate 22, both end portions of the first inner plate 22 extend outward of the paper box 11 along the end bending fold line 44. It is easy to bend towards. For this reason, when the grip portion 25 is pulled up, both end portions of the first superposed piece 24 are easily inclined toward the outside of the paper box 11 and are easily pulled out from both end portions of the second superposed piece 34 so that the pressure is not applied. Canceled. Subsequently, by performing the same operation on the other front and rear side plates 13, both the pressings of the first overlapping pieces 24 of the left and right side plates 14 holding the box shape are released, so that the paper box 11 can be easily disassembled. And can be done quickly.

  The paper box 11 according to the present invention is not limited to the above-described embodiment, and may be as follows.

  In each of the embodiments described above, the gripping portion forming cut 41 is a cut that is completely cut, but may not be cut completely. When the paper box 11 is disassembled, the grip part forming cut 41 is cut by pushing the upper side part of the front and rear side plate 13 outwardly of the paper box 11, and the tip side part of the grip part 25 is raised upward. Any one may be used, for example, a part of which is not cut such as a plurality of alternately arranged breaking breaks and breaking connecting portions.

  As shown in FIG. 12, at the front end side portion of the first overlapping piece 24 of the front and rear side plate 13, both end portions 25 a of the holding portion 25 adjacent to the holding portion forming cut 41 and the cut end portion 24 a of the first overlapping piece 24. May be formed in a smooth arc shape. In this case, when the grip portion 25 is operated for dismantling the paper box 11, both ends 25a of the grip portion 25 are formed in a smooth arc shape, so that the hand is gentle to the fingers and is prevented from being damaged. The safety at the time of 11 dismantling can be improved.

  As shown in FIG. 13, a plurality of breakage cuts and breakage connection parts are alternately arranged on a crease line 85 interposed between both side portions of the second inner plate 32 of the left and right side plates 14 and the insertion flap 35. May be. In this case, when the paper box 11 is disassembled, if the upper sides of the left and right side plates 14 are pushed outward in the paper box 11, a force for breaking the breaking connecting portion acts, Since both sides of the second inner plate 32 and the insertion flap 35 can be broken, the dismantling operation of the paper box 11 can be started from the left and right side plates 14.

  In each of the above embodiments, the both ends of the first polymerization piece 24 are pressed by the both ends of the second polymerization piece 34 so that the box shape of the paper box 11 is maintained. It is good also as a structure which does not overlap the 1 superposition | polymerization piece 24 and the 2nd superposition | polymerization piece 34. FIG. For example, as shown in FIG. 14, projecting pieces 26 are formed at both ends of the first overlapping piece 24 of the front and rear side plates 13, and insertion recesses 37 into which the projecting pieces 26 are inserted are formed at the lower sides of the left and right side plates 14. You may do it. In this case, as shown in FIG. 15, the box shape is maintained by pressing the protruding piece 26 with the insertion recess 37. Even in such a configuration, by operating the grip portion 25 of the first overlapping piece 24, the protruding piece 26 is pulled out from the insertion recess 37, the pressure is released, and the paper box 11 can be easily disassembled. Can be done.

  Further, in each of the above embodiments, the upper wall is provided on the upper portions of the front and rear side plates 13 and the left and right side plates, but a paper box without an upper wall may be used.

  The technical scope of the present invention described above is not limited to the above embodiment, and is not limited to the shape of the above embodiment. The technical scope of the present invention broadly covers the entire scope of technical ideas that the present invention truly intends, as will be apparent from the matters described in the present specification and drawings.

The top view of the paper box expansion | deployment formation body of the paper box 11 which concerns on Example 1. FIG. 1 is a simplified perspective view of a paper box 11 according to Embodiment 1. FIG. FIG. 4 is a simplified perspective view showing a state in which the upper side portion of the front and rear side plates 13 is pushed outward in the paper box 11. FIG. 3 is a simplified perspective view showing a state in which the grip portion 25 is pulled up toward the center of the paper box 11 and upward. FIG. 3 is a simplified perspective view showing a state in which both end portions of the first polymer piece 24 are pulled out from both end portions of the second polymer piece 34. The top view of the paper box expansion | deployment formation body of the paper box 11 which concerns on Example 2. FIG. FIG. 3 is a simplified perspective view showing a state in which the upper side portion of the front and rear side plate 13 of the paper box 11 is pushed outward in the paper box 11. The top view of the paper box expansion | deployment formation body of the paper box 11 which concerns on Example 3. FIG. FIG. 3 is a simplified perspective view showing a state in which the upper side portion of the front and rear side plate 13 of the paper box 11 is pushed outward in the paper box 11. The top view of the paper box expansion | deployment formation body of the paper box 11 which concerns on Example 4. FIG. FIG. 3 is a simplified perspective view showing a state in which the grip portion 25 is pulled up toward the center of the paper box 11 and upward. The perspective simplified view which shows the modification of the Example of this invention. The top view of the paper box expansion | deployment formation body which shows the modification of the Example of this invention. The top view of the paper box expansion | deployment formation body which shows the modification of the Example of this invention. The perspective simplified view which shows the modification of the Example of this invention. FIG. 12 is a perspective simplified view showing a conventional paper box 111.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Paper box 12 Bottom plate 13 Front-and-rear side plate 14 Left right side plate 21 1st outer side plate 22 1st inner side plate 23 1st upper plate part 24 1st superposition | polymerization piece 25 Gripping part 26 Protruding piece 31 2nd outer side plate 32 2nd inner side plate 33 2nd Upper plate portion 34 Second polymerized piece 35 Insertion flap 36 Connecting flap 37 Insertion recess 41 Gripping portion forming cut 42 Inner plate bending fold line 43 Outer plate bending fold line 44 End bending fold line

Claims (6)

Front and rear side plates each consisting of an inner plate and an outer plate are connected to opposite front and rear sides of a square bottom plate, and left and right side plates each consisting of an inner plate and an outer plate are connected to left and right sides facing the bottom plate, respectively. Polymerized pieces are continuously provided on the lower side of each inner plate, and insertion flaps are provided on both side portions of the inner plate of the left and right side plates, so that the front and rear side plates and the left and right side plates stand up against the bottom plate. The insertion flap is sandwiched between the inner plate and the outer plate of the front and rear side plates, and both ends of the overlapping pieces of the front and rear side plates are connected to both ends of the overlapping pieces of the left and right side plates or the lower side portions of the left and right side plates. A paper box in which the box form is held by pressing either or both,
A plurality of gripping portion forming notches are formed in the overlap pieces of the front and rear side plates from the front end side to the lower side portion of the inner side plate with a space in the width direction, and are sandwiched between the gripping portion forming cuts. A paper box characterized in that the gripped part is a gripping part.   2. The paper box according to claim 1, wherein a fold line for bending the inner side plate is formed on the inner side plate of each of the front and rear side plates from the vicinity of the upper side toward the end of the grip for forming the gripping portion.   3. The paper box according to claim 2, wherein a fold line for bending the outer plate is formed at a position substantially corresponding to the fold line for bending the inner plate in the outer plate of each of the front and rear side plates.   2. An end bending crease line is formed on the inner plate of each front and rear side plate from the vicinity of both ends of the upper side of the inner plate toward the end of the grip forming slit. 4. The paper box according to any one of items 1 to 3.   The paper box according to any one of claims 1 to 4, wherein the vicinity of the end adjacent to the grip portion forming incision is formed in a smooth arc shape at the front end side of the overlapping piece of the front and rear side plates.   6. A plurality of breaking cuts and breaking connecting portions are alternately arranged on a crease line interposed between both side portions of the inner plate of the left right plate and the insertion flap. The paper box of any one of.

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