JP6110832B2 - Packaging box - Google Patents

Description

  The present invention relates to a packaging box, and more particularly to a packaging box having a box body having an upper surface opened, and a lid that is connected to a back plate of the box body and opens and closes the box body. is there.

  Conventionally, there is a top open carton described in Patent Document 1 in a packaging box having a box body whose upper surface is opened and a lid body that is connected to the back surface of the box body and opens and closes with respect to the box body. To do.

  In the top open carton 1 of this patent document 1, the latching tongue which protrudes outward in the boundary part of the box front plate 5 of the box main body 2 and the box upper surface flap 12 provided in a row from the box front plate 5. A piece 21 is cut and formed, and when the lid 3 is closed, the locking tongue piece 21 is locked to the sticking flap 11a of the lid side plate 11 stuck to both sides of the lid front plate 5 of the lid 3. Is.

  And by pushing in the part by which the sticking board 15 in the lid | cover front board 5 is affixed, the box upper surface flap 12 advances to the box inner side, and the box upper surface flap 12 is latching to the latching | locking part 16. FIG. Therefore, the entire box upper surface flap 12 turns to the box bottom plate 4 side, and therefore, the locking tongue pieces 21 that have been locked to the sticking flap 11a in the substantially horizontal direction are directed upward. It rotates and the locked state with the sticking flap 11a is released. In this way, in the top open carton 1 after opening, the lid 3 can be easily opened without resistance by pushing the sticking part of the sticking plate 15 and raising the lid front plate 10 of the lid 3.

JP 2007-290749 A

  However, in the top open carton described in Patent Literature 1, the lid front plate 10 is lifted after the location of the sticking plate 15 of the lid front plate 5 is pushed to release the locking tongue piece 21 and the lid 3 is lifted. There is a problem in that the lid 3 cannot be easily opened. In particular, even if the lid front plate 5 is pushed in and the locking tongue piece 21 is unlocked, when the pushing operation of the lid front plate 5 is released, the locking of the box upper surface flap 12 to the locking portion 16 is released. Even if it returns to the original, the latching tongue piece 21 again latches to the sticking flap 11a, and the lid front plate 10 is raised, there is a possibility that the lid cannot be opened.

  In the top open carton described in Patent Document 1, the box front plate 5 is perpendicular to the box bottom plate 4, the lid front plate 10 is perpendicular to the lid top plate 9, and the box top flap 12 Is locked to the locking portion 16 of the partition 13, so that the locking tongue 21 protrudes to the front side, and the lid 3 is closed when the lid 3 is closed with respect to the box body 2. There is a problem that the lower end of the front plate 10 comes into contact with the locking tongue piece 21 and the closing operation of the lid 3 cannot be performed smoothly.

  Therefore, the present invention has a box main body having an open upper surface, a box main body connected to the back surface of the box main body, and a lid that opens and closes the box main body, and is provided continuously from the box front plate. In the packaging box in which the locking tongue piece protruding from the flap is locked to the sticking flap stuck on the lid front plate, the lid body is attached to the box body from the state in which the locking tongue piece is locked to the sticking flap. It is an object of the present invention to provide a packaging box that can be easily rotated and opened and can smoothly close the lid body with respect to the box body.

The present invention was created in order to solve the above-mentioned problems. First, a packaging having a box body (10) and a lid (110) and formed by a sheet-like blank. The box body portion includes a bottom surface portion (20), a first front surface portion (30), a first right side surface portion (50), a first left side surface portion (60), and a back surface portion (70). A side surface part (25) and an upper surface flap (40) provided continuously from the upper side of the first front part, and the upper surface flap body part (42) provided continuously from the upper side of the first front part. ) And a first projecting portion (44a) and a second projecting portion (44b) projecting from the end portion on the first front portion side of the upper surface flap main body portion, and the upper surface flap is formed on the first front portion. On the other hand, the upper surface part (120) in which the lid part is bent from the upper side of the rear surface part via a broken line, and the rear surface of the upper surface part. A second front surface portion (130) continuously provided via a broken line from the side portion opposite to the side, and a second right side surface portion (150) consecutively provided via a broken line from the side portion on the right side surface of the upper surface portion. And a second left side surface portion (160) continuously provided from the side portion on the left side surface side of the upper surface portion via a broken line, and a side line portion provided on the second front surface side of the second right side surface portion via a broken line. The first margin part (170) bonded to the inner surface of the second front part and the side part on the second front part side of the second left side part are connected via a broken line, and the second front part A first gap (S1) between the first glue margin, the second front portion, and the fold line (C130) between the upper surface portion and the second margin margin (180) bonded to the inner surface. There is formed a second gap (S2) is formed between the second margin portion and line of between the second front portion and the upper surface portion (C130), the first front portion, and the surface of its inner The angle between the upper surface of the face portion is formed to be inclined so that an obtuse angle, the second front portion is inclined so that the angle between the inner surface of the face and the upper face portion of the inside thereof an obtuse angle By closing the lid part with respect to the box body part, the first projecting part is pushed by the first glue margin part and bent with respect to the upper surface flap body part, and the second projecting part is It is pushed by the second glue margin and bends with respect to the upper surface flap main body, and then the first protrusion enters the first gap and engages with the first glue margin, and the second protrusion The part enters the second gap and engages with the second glue margin, the first protrusion and the first glue margin engage, and the second protrusion and the second glue margin engage In this state, by pressing the region between the first protrusion and the second protrusion from the outside in the left-right direction in the upper region of the first front portion, the fold line (C40 between the first front portion and the upper surface flap) ) Is curved to the back side, and the engagement between the first protrusion and the first adhesive margin and the engagement between the second protrusion and the second adhesive allowance are released, and the first front portion and the upper surface flap The upper surface flap is curved to the inner surface side of the upper surface flap (may be referred to as the “rear surface side”) by bending the fold line of the upper surface flap (“the upper surface flap is bulged on the inner surface side of the upper surface flap”). It is also possible to stand up while curving), and the upper surface portion is pushed up from below and the lid portion is rotated in the direction in which the lid portion opens.

  According to the packaging box having the first configuration, the first projecting portion and the first paste are pressed by pressing the region between the first projecting portion and the second projecting portion from the outside in the left-right direction in the upper region of the first front portion. Only by releasing the engagement of the margin part and the second protrusion part and the second glue margin part, the upper surface flap pushes up the upper surface part, and the lid part can be reliably rotated to the open state. It is possible to easily perform an operation in which the lid portion is rotated and opened with respect to the box body portion from the state where the portion is engaged with the glue margin portion.

Further, since the upper surface portion is lifted by raising the upper surface flap, the lid portion can be quickly and reliably rotated and opened. In particular, since the first front portion is inclined, pressing the front-side surface of the first front portion causes the upper surface flap to be easily raised from an obliquely lower side.

  Further, since the second front portion is formed to be inclined such that the angle between the inner surface and the inner surface of the upper surface portion is an obtuse angle, the second front portion is rotated so as to close the lid portion. On the other hand, when the height position of the tip of the second front portion reaches the height position of the first and second projections, the tip of the first and second projections and the front portion There is a gap between them, and the front end of the front portion does not come into contact with the first projecting portion and the second projecting portion, and the closing operation of the lid portion with respect to the box body portion can be performed smoothly.

  In the first configuration, the first projecting portion and the second projecting portion are substantially U-shaped incisions (K1) from the fold line (C40) between the upper surface flap and the first front portion to the first front portion side. , K2), the first protrusion and the second protrusion may be formed.

Second , in the first configuration, the sheet-like blank is a corrugated cardboard material, and the direction of the center step of the substantially corrugated cross section of the corrugated cardboard material is the first front portion and the upper surface flap. Is characterized in that it is perpendicular to the direction of the polygonal line between the first front face and the top flap .

  Third, in the first or second configuration, the first protrusion and the first margin allowance are engaged, and the second protrusion and the second margin allowance are engaged. Then, the upper region of the first front portion is pushed from the outside to release the engagement between the first protrusion and the first glue margin and the engagement between the second protrusion and the second glue margin. Thus, the lid portion is rotated and inclined so that the inner surface of the upper surface portion is at an acute angle with the direction of the upper surface of the bottom surface portion, and the upper surface flap is stopped by stopping the pushing operation to the first front surface portion. Is characterized in that it is inclined with respect to the bottom surface so that the tip thereof faces obliquely upward on the back side.

  Therefore, since the lid and the upper surface flap return to the basic state when the engagement is released, the lid portion is opened more quickly by the force of the lid and the upper surface flap to return. Can do.

  Fourthly, in any one of the first to third configurations, the upper region of the first front portion (the first projecting portion and the second portion in the left-right direction in the upper region of the first front portion). The first ruled line (46a, 46b, 46c) is formed so that the fold line between the first front part and the upper surface flap tends to bend toward the back side. It is characterized by that. Therefore, the rise of the upper surface flap by pushing the first front portion can be facilitated.

  Fifth, in the fourth configuration, the first ruled line is a ruled line formed in an upper region of the first front part, and a first projecting part is a broken line between the first front part and the upper surface flap. A plurality of ruled lines formed around the substantially central position in the left-right direction in the fold line between the second protrusions, and the plurality of ruled lines are formed with a central ruled line (46a) formed downward from the center position; A right side ruled line (46b) formed on the right side that forms an acute angle with respect to the fold line between the first front portion and the upper surface flap, and a left side that forms an acute angle with respect to the fold line between the first front portion and the upper surface flap. And a left side ruled line (46c) formed on the side.

  Sixthly, in any one of the first to fifth configurations, the region of the upper surface flap (the region between the first protrusion and the second protrusion in the left-right direction in the region of the upper surface flap) In the region, the upper surface flap may be curved toward the inner surface side of the upper surface flap, and second ruled lines (46d, 46e, 46f) are formed. Therefore, the rise of the upper surface flap by pushing the first front portion can be facilitated.

  Seventhly, in the sixth configuration, the second ruled line is a fold line between the first front surface portion and the upper surface flap, and is substantially the center in the left-right direction in the fold line between the first protrusion portion and the second protrusion portion. A central ruled line (46d) having a plurality of ruled lines formed around the position, wherein the plurality of ruled lines are formed at a substantially right angle with respect to a fold line between the first front portion and the upper surface flap from the center position; The right side ruled line (46e) formed on the right side surface with an acute angle with respect to the fold line between the first front surface portion and the upper surface flap, and the left side surface with an acute angle with respect to the fold line between the first front surface portion and the upper surface flap. And a left side ruled line (46f) formed on the side.

  Eighthly, in any one of the first to third configurations, the first projecting portion is formed by a broken line between the first front portion and the upper surface flap in the unfolded state of the first front portion and the upper surface flap. A radial ruled line (46) formed in the upper region of the first front portion and the region of the upper surface flap is provided around the substantially central position in the left-right direction on the broken line between the second protrusions. .

  Therefore, since the radial ruled line is provided, the fold line between the first front portion and the upper surface flap is easy to bend, and the upper surface flap is easy to be bent. Therefore, the rising of the upper surface flap by pushing the first front portion is facilitated. Can be easily.

  Ninth, in the fourth, fifth, or eighth configuration, the first projecting portion and the first margin allowance are associated with the region of the second front portion opposite to the upper surface portion. A part of the ruled lines (first ruled lines, radial ruled lines) formed in the upper region of the first front part in the state where the second projecting part and the second adhesive margin part are engaged with each other on the front side A notch part (131) for exposing to is formed. Thereby, it becomes easy to push the area where the ruled line is formed in the second front portion.

  Tenth, in any one of the first to ninth configurations, in the box body portion, the first right side surface portion has an obtuse angle between the inner surface and the upper surface of the bottom surface portion. The first left side surface portion is formed so that the angle between the inner surface and the upper surface of the bottom surface portion is an obtuse angle, and the back surface portion is formed on the inner surface and the bottom surface. In the lid portion, the second right side surface portion has an obtuse angle between the inner surface and the inner surface of the upper surface portion. The second left side surface portion is formed so as to be inclined such that the angle between the inner surface and the inner surface of the upper surface portion is an obtuse angle.

  Eleventhly, in any one of the first to tenth configurations, a first folded piece is provided between a right side portion of the first front portion and a front side portion of the first right side portion. Part (52) is provided, the first folding piece is folded in half and bonded to the outer surface of the first right side surface, and the right side of the first back side and the back of the first right side A second folded piece (54) is provided between the side edges, and the second folded piece is bonded to the outer surface of the first right side in a folded state, and the left side of the first front side. A third folded piece (62) is provided between the side part on the side and the front side part of the first left side part, and the third folded piece part is folded in half and the outer surface of the first left side part. A fourth folded piece (64) is provided between the side on the left side of the first back surface and the side on the back of the first left side, and the fourth folded piece Characterized in that in a state of being folded in two it is bonded to the outer surface of the first left side surface.

  According to the packaging box based on this invention, according to the packaging box of 1st structure, the area | region between a 1st protrusion part and a 2nd protrusion part is pushed from the outer side in the left-right direction in the upper area in a 1st front part. The upper surface flap pushes up the upper surface portion and the lid portion is reliably opened by simply releasing the engagement between the first protruding portion and the first adhesive margin portion and the second protruding portion and the second adhesive margin portion. Since it can be rotated, it is possible to easily perform an operation of turning the lid from the state in which the protruding portion is engaged with the adhesive margin portion to the box main body to be opened.

  Further, since the upper surface portion is lifted by raising the upper surface flap, the lid portion can be quickly and reliably rotated and opened.

  Further, since the second front portion is formed to be inclined such that the angle between the inner surface and the inner surface of the upper surface portion is an obtuse angle, the second front portion is rotated so as to close the lid portion. On the other hand, when the height position of the tip of the second front portion reaches the height position of the first and second projections, the tip of the first and second projections and the front portion There is a gap between them, and the front part does not come into contact with the first projecting part and the second projecting part, and the closing operation of the lid part with respect to the box body part can be performed smoothly.

It is a perspective view from the right side surface of a packaging box. It is a perspective view from the left side surface side of a packaging box. It is a right view of a packaging box. It is principal part explanatory drawing of a cover part. It is a perspective view of the packaging box of the state which closed the cover part. It is a right view of the packaging box of the state which closed the cover part. It is a front view of the packaging box of the state which closed the cover part. It is an expanded view of a packaging box. It is a principal part enlarged view of FIG. It is a principal part enlarged view of FIG. It is a use condition figure of a packaging box. It is explanatory drawing which shows the operation | movement at the time of lid closing of a packaging box. It is explanatory drawing which shows the operation | movement at the time of lid closing of a packaging box. It is explanatory drawing which shows the operation | movement at the time of opening of a packaging box. It is a perspective view which shows the operation | movement at the time of opening of a packaging box.

  In the present invention, a box upper surface flap having a box body having an open upper surface and a lid body that is connected to the back surface portion of the box body and opens and closes with respect to the box body, is provided continuously from the box front plate. In a packaging box where the locking tongue protruding from the locking flap is locked to the adhesive flap attached to the lid front plate, the lid is rotated relative to the box body from the state where the locking tongue is locked to the adhesive flap. The object of providing a packaging box that can be easily moved to an open state and can smoothly close the lid body with respect to the box body has been realized as follows.

  The packaging box A (which may be a box) according to the present invention is configured as shown in FIGS. 1 to 10, and includes a main body 10 and a lid 110 connected from the back surface 70 of the main body 10. Have. The packaging box A is formed of a single sheet-like blank shown in FIG. 8 (specifically, a blank made of cardboard (particularly, made of double-sided cardboard) (for example, a thin cardboard)).

  The main body 10 includes a rectangular (specifically, rectangular) bottom surface 20, a front surface 30 connected via a broken line from a front side of the bottom surface 20, and a bottom surface of the front surface 30. The upper surface flap 40 connected via a broken line from the side opposite to the portion 20, the right side surface 50 connected continuously via the broken line from the right side of the bottom surface portion 20, and the bottom surface portion 20. Left side portion 60 connected via a broken line from the side portion on the left side surface, rear surface portion 70 provided continuously from the side portion on the back side of bottom surface portion 20 via a broken line, front portion 30 and right side portion. 50, a folding piece portion 52 provided between the back surface portion 70 and the right side surface portion 50, a folding piece portion 62 provided between the front surface portion 30 and the left side surface portion 60, and a back surface portion. 70 and a folded piece portion 64 provided between the left side surface portion 60.

  In addition, the side part 25 is comprised by the front part 30, the right side part 50, the left side part 60, the back part 70, and the folding piece parts 52, 54, 62, and 64.

  The front part 30 has a trapezoidal shape, and is an isosceles trapezoid whose width in the lateral direction increases as the distance from the side part on the front side of the bottom part 20 increases. The side part on the right side of the front part 30 is in contact with the corner H1 on the right side on the front side of the bottom part 20, and the side part on the left side of the front part 30 is the left side on the front side of the bottom part 20. It is in contact with the side corner H2.

  The upper surface flap 40 has a horizontally long strip shape in the left-right direction, and has a shape in which rounds are provided at the corners on both sides of the horizontally long rectangular shape. That is, the upper surface flap 40 includes a linear side portion 40a formed from a position in the vicinity of the end portion on the right side of the upper side of the front portion 30 (that is, the polygonal line C40c) (the end portion position may be), and the side portion 40a. The substantially arc-shaped side part 40b provided continuously from the end part, the linear side part 40c provided continuously from the end part of the substantially arc-shaped side part 40b, and the end part of the side part 40c. A substantially arc-shaped side portion 40d, and a straight line formed between the end portion of the side portion 40d and the upper side of the front portion 30 (that is, the bent line C40a) near the end portion on the left side (may be the end portion position). Side part 40e, and is formed in the shape of left-right symmetry (that is, left-right line symmetry). The polygonal line C40 and the side part 40c are parallel to each other. The upper surface flap 40 has a shape surrounded by side portions 40a to 40e, a polygonal line C40, and substantially U-shaped side portions constituting projecting portions 44a and 44b (described later).

  The upper surface flap 40 includes an upper surface flap main body portion 42 formed from a fold line C40 with the front surface portion 30, and projecting portions 44a and 44b protruding from the base end of the upper surface flap main body portion 42.

  That is, substantially U-shaped cuts K1 and K2 are formed on the left and right sides of the boundary position between the upper surface flap 40 and the front portion 30, and the upper surface flap 40 is provided with projecting portions 44a and 44b. . That is, the protruding portion 44a is formed by the cut K1, and the protruding portion 44b is formed by the cut K2.

  That is, the fold line C40 between the front portion 30 and the upper surface flap 40 has a fold line C40a on the left side, a center fold line C40b, and a fold line C40c on the right side, and the fold line C40a, the fold line C40b, and the fold line C40c are Are formed in a straight line in the left-right direction, and are formed on the same straight line.

  The cut K1 is provided between the polygonal line C40b and the polygonal line C40c, and the cut K1 is formed at right angles to the cut K1a from the straight cut K1a formed in the left-right direction and the right side end of the cut K1a. And a cut K1b in contact with the polygonal line C40c, and a cut K1c formed perpendicular to the cut K1a from the left side end of the cut K1a, and in contact with the polygonal line C40b. The cut K1a, the cut K1b, and the cut K1c It has an almost U shape. The cuts K1b and K1c are formed toward the front part 30 side with respect to the broken line C40, whereby a notch is formed at the upper end of the front part 30 by forming the cut K1. That is, the protruding portion 44a is formed by forming a substantially U-shaped cut K1 on the front portion 30 side from the polygonal line C40 between the upper surface flap 40 and the front portion 30.

  The cut K2 is provided between the broken line C40a and the broken line C40b. The cut K2 is formed in a right angle with respect to the straight cut K2a formed in the left-right direction and the cut K2a from the left side end of the cut K2a. A cut K2b in contact with the polygonal line C40a, and a cut K2c formed perpendicular to the cut K2a from the right side end of the cut K2a, and in contact with the polygonal line C40b. The cut K2a, the cut K2b, and the cut K2c It has an almost U shape. The cuts K2b and K2c are formed toward the front part 30 side with respect to the broken line C40, whereby a notch is formed at the upper end of the front part 30 by forming the cut K2. That is, the protruding portion 44b is formed by forming a substantially U-shaped cut K2 on the front portion 30 side from the polygonal line C40 between the upper surface flap 40 and the front portion 30.

  Further, radial ruled lines 46 are formed on the front portion 30 and the upper surface flap 40. That is, the radial ruled lines 46 are formed radially around the center position G in the left-right direction of the broken line C40b, and are formed on the ruled lines (first ruled lines) 46a, 46b, 46c formed on the front surface 30 and the upper surface flap 40. And ruled lines (second ruled lines) 46d, 46e, and 46f. The ruled lines 46a to 46f are all formed in a straight line.

  Here, the ruled line 46a is formed downward from the center position G (perpendicular to the broken line C40b (or a direction perpendicular to the left-right direction (may be substantially perpendicular)), and the ruled line 46b is The ruled line 46c is inclined to the right side with respect to the ruled line 46a from the position G (that is, inclined obliquely downward to the right side), and the ruled line 46c is inclined to the left side with respect to the ruled line 46a. (That is, inclined obliquely downward on the left side surface side).

  The ruled lines 46a to 46c are formed in the upper area of the front part 30, and the formation area in the left-right direction is an area between the protruding part 44a and the protruding part 44b (note that the ruled lines 46a to 46c are It suffices if it is formed at least in the region between the projecting portion 44a and the projecting portion 44b in the left-right direction and may be formed outside the region between the projecting portion 44a and the projecting portion 44b in the left-right direction). The ruled lines 46 a to 46 c are formed from the center position G to the middle position from the lower side of the front part 30, but not to the lower side of the front part 30.

  That is, the ruled line (right side ruled line) 46b forms an acute angle with respect to the broken line C40b, and the ruled line (left side ruled line) 46c forms an acute angle with respect to the broken line C40b. The ruled lines 46a to 46c are “the first ruled line formed in the upper region of the first front part, and the fold line between the first front part and the upper surface flap is easily bent to the back side”. I can say that. In particular, since the ruled lines 46a to 46c are provided, it is easy to bend around each ruled line. Therefore, when the center part of the upper region of the front part 30 is pushed from the outside, the broken line C40b bulges to the back side. (That is, it bulges around the center position G) can be easily bent.

  In the above example, only the ruled line 46b is formed as the ruled line inclined to the right side. However, a plurality of ruled lines inclined to the right side may be provided, or the ruled line inclined to the left side. Only the ruled line 46c is formed, but a plurality of ruled lines inclined on the left side may be provided.

  Further, the ruled line 46d is formed in a direction perpendicular to the polygonal line C40b (which may be left and right) from the center position G (may be substantially perpendicular), and the ruled line 46e is on the right side of the ruled line 46d from the center position G. The ruled line 46f is formed so as to be inclined toward the left side with respect to the ruled line 46d from the center position G.

  The ruled lines 46d to 46f are formed in the area of the upper surface flap 40, and the formation area in the left-right direction is the area between the protrusions 44a and 44b (the ruled line 46d). ˜46f may be formed at least in a region between the projecting portion 44a and the projecting portion 44b in the left-right direction, and may be formed outside the region between the projecting portion 44a and the projecting portion 44b in the left-right direction. May be good). The ruled lines 46d to 46f are formed from the center position G to the side part on the front end side of the upper surface flap 40.

  The ruled lines 46e and 46f are inclined at an acute angle with respect to the left and right broken line C40b. That is, the ruled line (right side ruled line) 46e forms an acute angle with respect to the broken line C40b, and the ruled line (left side ruled line) 46f forms an acute angle with respect to the broken line C40b. It can be said that the ruled lines 46d to 46f are “second ruled lines that are formed in the region of the upper surface flap and the upper surface flap is easily curved toward the inner surface side of the upper surface flap”. In particular, since the ruled lines 46d to 46f are provided, it is easy to bend around each ruled line, so that the upper surface flap 40 is moved to the inner side of the upper surface flap 40 by pushing the central part of the upper region of the front part 30 from the outside. Can be easily bulged (that is, bulged around the ruled line 46d) to bulge to the surface side (that is, the surface side continuous from the inner surface of the front portion 30).

  In the above example, only the ruled line 46e is formed as the ruled line inclined to the right side, but a plurality of ruled lines inclined to the right side may be provided, or the ruled line inclined to the left side. Only the ruled line 46f is formed, but a plurality of ruled lines inclined to the left side surface may be provided.

  In the unfolded state of the front portion 30 and the upper surface flap 40, the ruled lines 46a and 46d are on the same straight line, the ruled lines 46b and the ruled line 46e are on the same straight line, and the ruled lines 46c and the ruled line 46f are on the same straight line.

  Since the radial ruled lines 46 are formed as described above, the front part 30 is easily bent to the back side by pushing the upper center area of the front part 30 (that is, the part of the ruled lines 46a) to the back side. As the front portion 30 is curved, the upper surface flap 40 tends to be on the back side.

  The right side surface portion 50 has a trapezoidal shape, and is an isosceles trapezoid whose width in the horizontal direction increases as the distance from the side portion on the right side surface side of the bottom surface portion 20 increases. The front side of the right side 50 is in contact with the right side corner H1 on the front side of the bottom 20 and the back side of the right side 50 is on the right side on the back of the bottom 20. It is in contact with the corner H3.

  Further, the left side surface portion 60 has a trapezoidal shape and is an isosceles trapezoid whose width in the lateral direction increases as the distance from the side portion on the left side surface side of the bottom surface portion 20 increases. A side portion on the front side of the left side surface portion 60 is in contact with a left side corner portion H2 on the front side of the bottom surface portion 20, and a side portion on the back surface side of the left side surface portion 60 is on the left side surface side on the back surface side of the bottom surface portion 20. It is in contact with the corner H4. In addition, the right side surface part 50 and the left side surface part 60 are formed to be bilaterally symmetric (that is, bilaterally symmetric) in the unfolded state of the packaging box A. In addition, the angle α4 with respect to the lower sides of the front and rear sides of the left side 60 is the same as the angle α3 with respect to the lower sides of the front and rear sides of the right side 50 and the length between the lower and upper sides of the left side 60 is The length between the lower side and the upper side in the right side surface portion 50 is the same. Α3 and α4 are formed at an obtuse angle.

  The back surface portion 70 has a trapezoidal shape, and is an isosceles trapezoid whose width in the lateral direction increases as the distance from the side portion on the back surface side of the bottom surface portion 20 increases. The side on the right side of the back surface 70 is in contact with the corner on the right side on the back of the bottom 20, and the side on the left side of the back 70 is on the left side on the back of the bottom 20. It touches the corner. In addition, the back surface portion 70 is formed substantially symmetrically with the front surface portion 30 in the unfolded state of the packaging box A, and the angle α2 with respect to the lower sides of the left and right side portions of the back surface portion 70 is the left and right side edges of the front surface portion 30. The length between the lower side and the upper side in the back surface 70 is the same as the length between the lower side and the upper side (may be a broken line C40) in the front portion 30. Α1 and α2 are formed at an obtuse angle.

  Further, in the unfolded state, the folded piece portion 52 has a side portion on the right side surface of the front portion 30, a side portion on the front side of the right side portion 50, and an upper end of the side portion on the right side surface of the front portion 30. It has a triangular shape surrounded by a side portion 52a that connects the upper end of the side portion on the front side of the right side portion 50, and the length of the side portion on the right side side of the front portion 30 and the length of the side portion on the front side of the right side portion 50. The triangles are isosceles triangles. The folded piece portion 52 is divided into an inner piece portion 52-1 and an outer piece portion 52-2 via a perpendicular line C52 from the corner portion H1 to the side portion 52a, and the folded piece portion 52 is separated via the perpendicular line C52. The inner piece portion 52-1 is bonded to the outer surface of the right side surface portion 50 in a folded state.

  Further, in the unfolded state, the folded piece portion 54 includes a side portion on the right side surface of the back surface portion 70, a side portion on the back surface side of the right side surface portion 50, and an upper end of the side portion on the right side surface side of the back surface portion 70. It has a triangular shape surrounded by a side portion 54 a connecting the upper end of the side portion on the back side of the right side surface portion 50, and the length of the side portion on the right side surface side of the back surface portion 70 and the length of the side portion on the back side of the right side surface portion 50. The triangles are isosceles triangles. The folded piece portion 54 is divided into an inner piece portion 54-1 and an outer piece portion 54-2 via a perpendicular line C54 from the corner portion H3 to the side portion 54a, and the folded piece portion 54 is separated via the perpendicular line C54. The inner piece portion 54-1 is bonded to the outer surface of the right side surface portion 50 in a folded state.

  Further, in the unfolded state, the folded piece portion 62 includes a side portion on the left side of the front portion 30, a side portion on the front side of the left side portion 60, and an upper end of the side portion on the left side of the front portion 30. It has a triangular shape surrounded by a side portion 62 a that connects the upper end of the side portion on the front side of the left side surface portion 60, and the length of the side portion on the left side surface side of the front portion 30 and the length of the side portion on the front side of the left side surface portion 60. The triangles are isosceles triangles. The folded piece 62 is divided into an inner piece 62-1 and an outer piece 62-2 via a perpendicular C62 from the corner H2 to the side 62a, and the folded piece 62 is separated via the perpendicular C62. The inner piece 62-1 is bonded to the outer surface of the left side surface portion 60 in a folded state.

  Further, in the unfolded state, the folded piece portion 64 includes a side portion on the left side surface side of the back surface portion 70, a side portion on the back surface side of the left side surface portion 60, and an upper end of the side portion on the left side surface side of the back surface portion 70. It has a triangular shape surrounded by a side portion 64 a that connects the upper end of the side portion on the back side of the left side surface portion 60, and the length of the side portion on the left side surface side of the back surface portion 70 and the length of the side portion on the back surface side of the left side surface portion 60. The triangles are isosceles triangles. The folded piece 64 is divided into an inner piece 64-1 and an outer piece 64-2 via a perpendicular C64 from the corner H4 to the side 64a, and the folded piece 64 is separated via the perpendicular C64. The inner piece 64-1 is bonded to the outer surface of the left side surface portion 60 in a folded state.

  Further, the lid part 110 includes a top surface part 120 provided continuously from the upper side of the back surface part 70 via a polygonal line, and a polygonal line C130 from a side part on the front side of the top surface part 120 (a side part opposite to the back surface part 70). Through the front side 130, the right side 150 from the side on the right side of the top surface 120 via a broken line, and the side from the side on the left side of the top 120 via a polygonal line. A left side surface portion 160 that is continuously provided, a glue margin portion 170 that is continuous from the side portion on the front side of the right side surface portion 150 via a broken line and is bonded to the inner surface of the front surface portion 130, and the front surface of the left side surface portion 160. It has a glue margin part 180 which is connected from the side part on the side via a broken line and is bonded to the inner surface of the front part 130.

  Here, the upper surface portion 120 has a rectangular shape (specifically, a rectangular shape), and the length in the left-right direction (long side length) is substantially the same as the length of the upper side of the back surface portion 70. The length in the direction (the length of the short side) is substantially the same as the length of the upper side of the right side surface portion 50 and the length of the upper side of the left side surface portion 60.

  Further, the front portion 130 has a shape in which notches are formed at both corners with respect to the isosceles trapezoid, and a substantially concave notch is formed at the center in the left-right direction. A side part 130a formed along the part, a straight side part 130b formed at an obtuse angle with respect to the side part 130a from the right side end of the side part 130a, and a side part 130a of the side part 130b. Is provided continuously from the end on the opposite side, and is provided continuously from the end opposite to the side 130b of the side 130c and the side 130c substantially parallel to the side 130a. An obtuse straight side portion 130d, a side portion 130e of the side portion 130d opposite to the side portion 130c, and a side portion 130e formed substantially parallel to the side portion 130a, and a side of the side portion 130e It is connected from the end on the opposite side to the portion 130d and is directed to the side portion 130a. A curved arc-shaped side portion 130f, an end portion of the side portion 130f opposite to the side portion 130e, and an arc-shaped side portion 130g curved to the opposite side to the side portion 130a side; The portion 130g is connected from the end opposite to the side portion 130f, is connected to the arc-shaped side portion 130h that curves to the left side, and the end portion of the side portion 130h that is opposite to the side portion 130g. The straight side portion 130i formed substantially parallel to the side portion 130a and the end portion on the opposite side of the side portion 130h of the side portion 130i are connected to each other and formed on the oblique side portion 130a side to the left side surface side. The straight side portion 130j that is formed and the side portion that is connected to the end portion of the side portion 130j opposite to the side portion 130i, is substantially parallel to the side portion 130a, and forms an obtuse angle with respect to the side portion 130j. 130k and the end of the side 130k opposite to the side 130j and the side 13 Formed between the ends of the left side of a, and a side portion 130l which forms an obtuse angle to the side portion 130a.

  Here, the side portion 130f to the side portion 130h form a cutout portion 131 in a region opposite to the upper surface portion 120 side of the front surface portion 130, whereby the protruding portion 44a and the adhesive margin portion 170 are engaged. The ruled line 46d, which is a part of the radial ruled line 46, is exposed to the front side in a state where the protruding part and the adhesive margin part 180 are engaged, and the protruding part 44a and the adhesive margin part 170 are engaged. It is easy to push the portion of the ruled line 46d in a state where the protruding portion and the glue margin portion 180 are engaged.

  The front portion 130 is formed symmetrically (that is, left-right line symmetry), the side portion 130b is formed symmetrically with the side portion 130l (that is, left-right line symmetry), and the side portion 130c is formed side-by-side with the side portion 130k. The side portion 130d is formed symmetrically with the side portion 130j, the side portion 130e is formed symmetrically with the side portion 130i (that is, left-right line symmetrical), and the side portion 130f is formed. Is formed symmetrically with respect to the side portion 130h (that is, symmetrical with respect to the horizontal line).

  Further, the right side surface portion 150 has a substantially strip-like shape that is elongated along the side portion on the right side surface side of the upper surface portion 120, and the front side is formed wider than the back side. That is, the right side portion 150 includes a side portion 150a along the side portion on the right side surface of the upper surface portion 120, and a linear side portion 150b that forms an obtuse angle with respect to the side portion 150a from the front end portion of the side portion 150a. And the side 150b of the side 150b is connected from the end opposite to the side 150a, the side 150c having an arc shape, and the side 150c of the side 150c is connected from the end opposite to the side 150b. The side part 150d that is inclined with respect to the part 150a (inclined so that the distance from the side part 150a becomes shorter toward the back side) and the end part of the side part 150d opposite to the side part 150c are continuously provided. And an arcuate side 150e, and an end of the side 150e opposite to the side 150d and a straight side 150f formed between the back of the side 150a. .

  Further, the left side surface portion 160 has an elongated substantially strip shape along the side portion on the left side surface side of the upper surface portion 120, and the front side is formed wider than the back side. In the unfolded state of the packaging box A, the left side surface portion 160 is formed to be bilaterally symmetric (that is, bilaterally symmetric) with the right side surface portion 150.

  The glue margin 170 has a bowl shape as a whole, and is provided continuously from a side 170a formed along the side 150b and a lower end of the side 170a, and an obtuse angle (packaging box A) with respect to the side 170a. In the unfolded state, the side portion 170b formed in a direction perpendicular to the left-right direction and the end portion of the side portion 170b opposite to the side portion 170a are connected and curved (adhesive margin). In a state where the portion 170 is bonded to the front portion 130, the front portion is formed to bend toward a fold line C130 (also referred to as a side portion 130a) between the upper surface portion 120 and the front portion 130. A straight side portion formed from a side portion 170c (curved toward 130) and an end portion of the side portion 170c opposite to the side portion 170b and formed substantially at right angles to the side portion 170b. 170d and side 170c of side 170d In a state in which the end portion on the opposite side is connected and formed at an acute angle with respect to the side portion 170d and the adhesive margin portion 170 is bonded to the front portion 130, it is parallel to the broken line C130 (may be substantially parallel), and the broken line C130. And a straight side 170e formed through a distance h1 (see FIG. 4) and an end opposite to the side 170d of the side 170e, and form an obtuse angle with respect to the side 170e. A straight side 170f, a straight side 170g formed between the end of the side 170f opposite to the side 170e and the end of the side 170a and forming an acute angle with the side 170f; The side portion 170e and the side portion 130d are adjacent to each other through a cut, the side portion 170f and the side portion 130c are adjacent to each other through a cut, and the side portion 170g and the side portion 130b are adjacent to each other through a cut. doing. That is, in the unfolded state of the packaging box A, the side portion on the front portion 130 side of the adhesive margin portion 170 is adjacent to the front portion 130 through the cut. Here, the side portion 170e at the tip of the margin portion 170 engages with the protruding portion 44a when the lid portion 110 is closed. That is, the distance S1 between the side portion 170e and the broken line C130 is h1.

  The margin portion 180 has a bowl shape as a whole, and is formed symmetrically with the margin portion 170 (that is, symmetrical with the left and right lines in the unfolded state of the packaging box A). That is, the straight side portion 180e at the tip of the margin portion 180 is parallel to the fold line C130 (or may be substantially parallel) in a state where the margin portion 180 is bonded to the front portion 130, and is spaced from the fold line C130 and the interval h2 ( This side portion 180e is engaged with the protruding portion 44b when the lid portion 110 is closed. The interval h1 and the interval h2 are the same (may be substantially the same). That is, the gap S2 between the side portion 180e and the broken line C130 is h2.

  As in the case of the margin portion 170, in the unfolded state of the packaging box A, the side portion on the front portion 130 side of the margin portion 180 is adjacent to the front portion 130 through a cut.

  The lengths of the intervals h1 and h2 are longer than the lengths of the projecting portions 44a and 44b (the length from the base end to the tip end).

  The packaging box A is configured as described above, and as shown in FIG. 8, the packaging box A is formed symmetrically on the whole (that is, symmetrical on the left and right lines) in the expanded state.

  In the state where the packaging box A is assembled, the inner side pieces 52-1 and 54-1 are bonded to the right side surface portion 50, and the inner side pieces 62-1 and 64-1 are bonded to the left side surface portion 60. The side part on the front side of 50 is adjacent to the side part on the right side of the front part 30 along the side part on the right side of the front part 30, and the side part on the back side of the right side part 50 is the right side of the back part 70. The side part on the front side of the left side part 60 is adjacent to the side part on the right side side of the back part 70 along the side part on the surface side, and the left side of the front part 30 along the side part on the left side side of the front part 30 The side on the back side of the left side surface 60 is adjacent to the side on the left side of the back surface 70 along the side on the left side of the back surface 70.

  The margin portion 170 and the margin portion 180 are bonded to the inner surface of the front portion 130, and the side portion 150 b on the front side of the right side portion 150 extends along the side portion 130 b on the right side surface side of the front portion 130. Adjacent to the side portion 130 b, the side portion 160 b on the front side of the left side surface portion 160 is adjacent to the side portion 130 l along the side portion 130 l on the left side surface side of the front portion 130.

  Further, since the front surface portion 30, the right side surface portion 50, the left side surface portion 60 and the back surface portion 70 in the main body portion 10 are formed in a trapezoidal shape, the front surface portion 30, the right side surface portion 50, the left side surface portion 60 and the back surface portion 70 are It is inclined so as to be on the outer side (that is, the further away from the bottom surface part 20), for example, the front part 30 is inclined so as to be on the front side as it goes upward. That is, the front portion 30, the right side surface portion 50, the left side surface portion 60, each portion of the back surface portion 70, and the bottom surface portion 20 form an obtuse angle.

  Also in the lid part 110, the front part 130, the right side part 150, and the left side part 160 are inclined so as to be on the outer side (that is, away from the upper part 120). Each portion of the right side surface portion 150 and the left side surface portion 160 and the upper surface portion 120 form an obtuse angle.

  Further, the state in which the projections 44a and 44b are disengaged from the glue margins 170 and 180, particularly the state in which the projections 44a and 44b and the glue margins 170 and 180 are engaged, In a state where the upper region is pushed and the engagement is released, as shown in FIGS. 1 to 3, the lid part 110 is rotated upward with respect to the main body part 10, and the upper surface part 120 of the lid part 110. Is inclined at an acute angle with respect to the bottom surface portion 20 (that is, the inner surface of the upper surface portion 120 and the direction of the upper surface of the bottom surface portion 20 are at an acute angle) (this state is referred to as the lid portion 110). About the natural state). That is, the state where no external force is applied to the lid 110 is the natural state of the lid 110.

  Note that the lid 110 is moved 90 degrees from a state in which the protruding portions 44a and 44b engage with the adhesive margins 170 and 180 and the lid 110 is closed (that is, the top surface 120 is substantially parallel to the bottom surface 20). When rotated as described above, as shown in FIG. 11, the lid portion 110 is stationary with the inner surface of the upper surface portion 120 forming an obtuse angle with respect to a surface parallel to the bottom surface portion 20.

  Further, in the natural state (that is, in a state in which the upper surface flap 40 is not pushed by the upper surface part 120), the upper surface flap 40 is inclined so that the tip thereof faces obliquely upward. Then, it is bent inward and turned to an acute angle from a state parallel to the bottom surface portion 20 (this state is a natural state of the upper surface flap 40). That is, the state in which no external force is applied to the upper surface flap 40 is the natural state of the upper surface flap 40. In particular, since the front portion 30 is inclined so as to be on the front side as it goes upward, the upper surface flap 40 tends to be inclined so that the tip thereof faces obliquely upward in a natural state.

  Further, the unfolded state of the packaging box A is shown in FIG. 8, but the direction of the center of the double-sided corrugated cardboard material constituting the packaging box A (that is, the center of the substantially corrugated cross section) is shown in FIG. As shown in the circle, it is formed in a direction perpendicular to the left-right direction. Thereby, in the front part 30 and the upper surface flap, the direction of the step of the center is a direction perpendicular to the broken line C40. That is, the substantially corrugated shape of the core can be visually recognized at the side portion 40c on the front end side of the upper surface flap 40 and the side portion on the front end side of the front surface portion 130 (side portion opposite to the upper surface portion 120 side).

  Thereby, since the step of the core is orthogonal to the polygonal line C40 between the front part 30 and the upper surface flap 40, the front of the corrugated cardboard is as follows as compared with the case where the direction of the center of the cardboard is the left-right direction. It can be said that the upper surface flap 40 is easily raised by performing the pushing operation to the portion 30.

  The cardboard material is a double-sided cardboard material, but it may be a single-sided cardboard material (the liner bonded to the core may be inside or outside the packaging box). Even in the case of a single-sided corrugated cardboard material, the upper surface flap 40 can be easily raised by pushing the front part 30 by setting the direction of the corrugated cardboard material to a direction perpendicular to the left-right direction.

  In addition, although the direction of the step of the core is a direction perpendicular to the left-right direction, it is not limited to this and may be another direction. Moreover, as a sheet-like blank which comprises the packaging box A, sheet-like blanks (for example, cardboard) other than corrugated board material may be sufficient.

  The use state of the packaging box A having the above configuration will be described. First, the lid 110 is opened from the state in which the protruding portions 44 a and 44 b are not engaged with the adhesive margin portions 170 and 180, and the objects to be stored are stored in the main body portion 10. For example, as shown in FIG. 11, the object to be stored is placed in the main body portion 10 with the lid portion 110 opened so that the inner surface of the upper surface portion 120 forms an obtuse angle with respect to the surface parallel to the bottom surface portion 20. Store.

  Thereafter, the lid part 110 is rotated toward the main body part 10 so that the upper surface part 120 is substantially parallel to the bottom surface part 20, whereby the projecting parts 44 a and 44 b are engaged with the adhesive margin parts 170 and 180. Part 110 is closed. 12 to 13 used in the following description, only the protruding portion 44b of the protruding portions 44a and 44b is shown. However, since the protruding portion 44a has the same action, "Like portion 44b (44a)".

  That is, the lid 110 is rotated in the closed direction, and as shown in FIG. 12A, the height of the tip of the front portion 130 of the lid 110 is the height of the protrusion 44b (44a). When in the height position, the front part 130 originally forms an obtuse angle with respect to the upper surface part 120, and therefore, in the state shown in FIG. 12A, there is a gap between the protrusion 44a and the front end of the front part 130. n exists (there is also a gap between the protruding portion 44b and the front end of the front portion 130), the front portion 130 does not contact the protruding portions 44a and 44b, and the body portion of the lid portion 110 10 can be smoothly closed. In particular, the upper surface flap 40 is inclined so that the tip thereof is obliquely upward in its natural state, so that the protrusions 44a and 44b are directed obliquely downward as shown in FIG. Even if the front end of the front portion 130 comes into contact with the projecting portions 44a and 44b, the upper surface flap 40 is slightly rotated outward, and the front end of the front portion 130 is outside the projecting portions 44a and 44b. Therefore, the protrusions 44a and 44b do not interfere with the closing operation.

  When the lid part 110 is rotated from the state shown in FIG. 12A, the tip of the upper surface flap 40 comes into contact with the inner surface of the upper surface part 120 as shown in FIG. When the 110 is rotated, the protruding portion 44b (44a) comes into contact with the adhesive margin portion 180 (170), and then the lid portion 110 is lowered to be pushed by the adhesive margin portion 180 (170). The convex portion 44b (44a) is bent at an acute angle with respect to the upper surface flap 40, and as shown in FIG. 13C, the upper surface of the protruding portion 44b (44a) is the adhesive margin portion 180 (170). The lid portion 110 is lowered while being in contact with the outer surface.

  In the above description, the protrusion 44b (44a) contacts the adhesive margin 180 (170) after the tip of the upper surface flap 40 contacts the inner surface of the upper surface 120. Or the order may be reversed.

  Thereafter, when the tip of the protruding portion 44b (44a) reaches the position of the side portion 180e (170e) of the adhesive margin portion 180, the protruding portion 44b (44a) enters the gap S2 (S1), and FIG. ), The tip of the projecting portion 44b (44a) comes into contact with the side portion 180e (170e), and the projecting portion 44b (44a) and the adhesive margin portion 180 (170) are engaged. In a state where the upper surface of the protruding portion 44b (44a) is in contact with the outer surface of the adhesive margin portion 180 (170), the front portion 130 forms an obtuse angle with respect to the upper surface portion 120, and the protruding portion 44b (44a). ) With respect to the upper surface portion 120 is small, so that when the projecting portion 44b (44a) reaches the gap S2 (S1), the projecting portion 44b (44a) is easily returned from the bent state, Therefore, it can be said that the protruding portion 44b (44a) easily enters the gap.

  As described above, the protruding portion 44b (44a) engages with the adhesive margin portion 180 (170), and the lid portion 110 is locked in the closed state. When the lid 110 is locked in the closed state, the upper surface flap 40 is substantially horizontal (substantially parallel to the bottom surface 20) as shown in FIG. Even in this state, the upper surface flap 40 itself pushes the upper surface portion 120 upward to return to the natural state, but the protruding portion 44b (44a) engages with the adhesive margin portion 180 (170) and is locked. Therefore, the upper surface flap 40 cannot be returned to the natural state. The lid 110 is also about to return to the natural state (that is, about to rotate upward), but the protrusion 44b (44a) is locked by being engaged with the adhesive margin 180 (170). Therefore, the lid part 110 cannot return to the natural state.

  Next, from the state where the lid 110 is locked in the closed state, a region on the center upper side of the front portion 30 of the main body 10 (that is, the location of the ruled line 46a) is pushed back (see FIG. 14A). ), The front part 30 is curved to the back side, and the fold line C40 between the front part 30 and the upper surface flap 40 is bent along with the curve of the front part 30, and the fold line C40 is bent (it may be “simply”) ( By engaging the central portion of the polygonal line C40 in a concave shape on the back side), the engagement between the protruding portion 44b (44a) and the adhesive margin portion 180 (170) is released.

  In addition, since the polygonal line C40 is concavely curved toward the back side, the upper surface flap 40 is curved toward the back side (may be “bent”) (that is, centered in the horizontal direction of the upper surface flap 40). Since it rises to the back side (that is, bulges and curves in a concave shape) toward the back side (that is, to the inside surface side of the top surface flap 40), the top surface flap 40 pushes up the top surface part 120 (this may be raised). Further, since the upper surface flap 40 itself tries to return to the basic state, it is also rotated upward by the returning force to lift the upper surface part 120. Furthermore, after the cover part 110 is pushed up by the upper surface flap 40, the cover part 110 itself rotates to return to the basic state, and then returns to the basic state. In particular, since the front portion 30 is inclined, the upper surface flap 40 is likely to rise because the front portion 30 is pushed from an obliquely lower side by pushing the surface on the front side.

  In addition, by stopping the pushing operation to the front portion 30, the upper surface flap 40 is released from the rising by the pushing operation to the front portion 30 and returns to the basic state (see FIG. 14B and FIG. 15). .

  That is, since the upper surface flap 40 pushes up the upper surface portion 120, the speed at which the lid portion 110 starts to rotate upward (that is, the initial rotation speed) is made faster than when the upper surface flap 40 is not pushed up. The time until the lid 110 returns to the basic state can be shortened. As described above, the upper surface portion 120 is lifted by the upper surface flap 40 rising, the upper surface flap 40 is rotated to return, the upper surface portion 120 is lifted, and the lid portion 110 itself is rotated upward. The lid 110 can be quickly and reliably rotated and opened.

  In particular, when there is no push-up by the upper surface flap 40, the lid part 110 itself turns upward only by the returning force to return to the basic state, so that the initial speed of the turn is slow and the time for pushing the front part 30 is reduced. If it is short, the released engagement state may be performed again (that is, engage again). However, in the case of this embodiment, the initial speed of rotation is fast, so the front portion 30 is pushed. Even if the operation is short, the lid 110 can be reliably rotated to the open state.

  Further, since the upper surface flap 40 is inclined obliquely in the basic state, the upper surface flap 40 supports the upper surface portion 120 from below even if the returning force of the lid portion 110 to the basic state is weakly lowered. The protrusions 44a and 44b and the adhesive margins 170 and 180 are not engaged with each other.

  As described above, the upper surface flap 40 pushes up the upper surface portion 120 only by pressing the upper region of the front portion 30 to release the engagement between the protruding portion 44b (44a) and the adhesive margin portion 180 (170). Since the lid portion 110 can be reliably rotated to the open state, the lid portion 110 is rotated with respect to the main body portion 10 from the state where the projecting portions 44 a and 44 b are engaged with the adhesive margin portions 180 and 170. Can be easily performed.

  Further, since the front portion 130 forms an obtuse angle with respect to the upper surface portion 120, when the lid portion 110 is rotated so as to be closed, the height position of the tip of the front portion 130 of the lid portion 110 is the protruding portion 44b. When reaching the height position of (44a), there is a gap between the protrusions 44a, 44b and the front end of the front part 130, and the front part 130 does not contact the protrusions 44a, 44b, The closing operation of the lid 110 with respect to the main body 10 can be performed smoothly.

A Packaging box 10 Main body part 20 Bottom face part 25 Side face part 30, 130 Front face part 40 Upper surface flap 42 Upper surface flap main body part 44a, 44b Projection part 46 Radial ruled line 50, 150 Right side part 52, 54, 62, 64 Folding piece part 52 -1, 54-1, 62-1, 64-1 Inner piece 52-2, 54-2, 62-2, 64-2 Outer piece 60, 160 Left side portion 70 Back portion 170, 180 Adhesive margin

Claims (11)

A packaging box having a box body (10) and a lid (110) and formed by a sheet-like blank,
The box body is
A bottom surface (20);
A side part (25) comprising a first front part (30), a first right side part (50), a first left side part (60) and a back part (70);
An upper surface flap (40) provided continuously from the upper side of the first front part,
The upper surface flap includes an upper surface flap main body portion (42) continuously provided from the upper side of the first front surface portion, a first projecting portion (44a) projecting from an end portion of the upper surface flap main body portion on the first front surface side, and 2 protrusions (44b),
The upper surface flap bends to the back side with respect to the first front part,
The lid is
An upper surface portion (120) provided continuously from the upper side of the back surface portion via a broken line;
A second front part (130) connected via a broken line from the side opposite to the back part of the upper surface part;
A second right side surface portion (150) provided continuously from a side portion on the right side surface side of the upper surface portion via a broken line;
A second left side surface part (160) connected from the side part on the left side surface side of the upper surface part via a broken line;
A first adhesive margin part (170) continuously provided from the side part on the second front part side of the second right side part via a broken line, and bonded to the inner surface of the second front part;
A second glue margin (180) continuously provided from the side on the second front surface side of the second left side surface via a broken line and bonded to the inner surface of the second front surface portion;
A first gap (S1) is formed between a fold line (C130) between the first margin part, the second front part, and the upper surface part, and a fold line between the second glue part, the second front part, and the upper surface part ( C130), a second gap (S2) is formed,
The first front portion is formed so as to be inclined such that the angle between the inner surface and the upper surface of the bottom portion is an obtuse angle,
The second front portion is formed so as to be inclined such that the angle between the inner surface and the inner surface of the upper surface portion is an obtuse angle,
By closing the lid with respect to the box body, the first protrusion is pushed by the first glue margin and is bent with respect to the upper flap body, and the second protrusion is the second glue margin. pushed by the part and bent against the top flap body portion, then, the first protrusion is engaged with the first overlap portion enters the first gap, the second projecting portion and the second Into the gap between the second glue margin,
In a state where the first protrusion and the first adhesive margin are engaged and the second protrusion and the second adhesive margin are engaged, the first protrusion in the left-right direction in the upper region of the first front portion. By pressing the region between the first protrusion and the second protrusion from the outside, the fold line (C40) between the first front face and the upper surface flap is curved to the back side, and the relationship between the first protrusion and the first adhesive margin And the engagement between the second projecting portion and the second adhesive margin portion is released, and the fold line between the first front surface portion and the upper surface flap curves to the back surface side, so that the upper surface flap is moved to the inner surface side of the upper surface flap. A packaging box, which rises while being curved, pushes up the upper surface portion from below, and rotates the lid portion in the direction in which the lid portion opens. The sheet-like blank is a corrugated cardboard material, and the direction of the center step of the substantially corrugated cross-sectional shape of the corrugated cardboard material is the direction of the broken line between the first front face part and the upper face flap in the first front face part and the upper face flap. The packaging box according to claim 1, wherein the packaging box is perpendicular to the direction . In a state where the first protruding portion and the first adhesive margin portion are engaged and the second protruding portion and the second adhesive margin portion are engaged, the upper region of the first front portion is pushed from the outside to By releasing the engagement between the projecting portion and the first adhesive margin portion and the engagement between the second projecting portion and the second adhesive margin portion, the lid portion is rotated and the inner surface of the upper surface portion is moved. By tilting to an acute angle with the direction of the upper surface of the bottom surface portion, and stopping the pushing operation to the first front surface portion, the top surface flap is directed to the bottom surface portion so that the front end faces obliquely upward on the back side. The packaging box according to claim 1, wherein the packaging box is inclined. A first ruled line (46a, 46b, 46c) is formed in the upper region of the first front part so that the fold line between the first front part and the upper surface flap is easily bent to the back side. The packaging box of Claim 1 or 2 or 3. The first ruled line is a ruled line formed in an upper region of the first front part, and is a crease line between the first front part and the upper surface flap, and is substantially the center in the left-right direction in the fold line between the first projecting part and the second projecting part. A plurality of ruled lines formed around the position, the plurality of ruled lines being acute with respect to a central ruled line (46a) formed downward from the center position and a fold line between the first front portion and the upper surface flap; A right side ruled line (46b) formed on the right side and a left side ruled line (46c) formed on the left side making an acute angle with respect to the fold line between the first front part and the top flap. The packaging box according to claim 4, wherein the packaging box is provided. The second ruled line (46d, 46e, 46f) for facilitating the upper surface flap to be bent toward the inner surface side of the upper surface flap is formed in the region of the upper surface flap. The packaging box according to 3 or 4 or 5. The second ruled line has a plurality of ruled lines formed around the substantially center position in the left-right direction in the fold line between the first protrusion and the second protrusion at the fold line between the first front part and the upper surface flap, The plurality of ruled lines have a central ruled line (46d) formed substantially perpendicular to the fold line between the first front surface portion and the upper surface flap from the center position, and an acute angle with respect to the fold line between the first front surface portion and the upper surface flap. A right side ruled line (46e) formed on the right side and a left side ruled line (46f) formed on the left side making an acute angle with respect to the fold line between the first front part and the top flap. The packaging box according to claim 6, wherein the packaging box is provided. In the unfolded state of the first front portion and the upper surface flap, the first front surface is centered on a substantially central position in the left-right direction along the fold line between the first protrusion and the second protrusion at the fold line between the first front portion and the upper surface flap. 4. A packaging box according to claim 1, 2 or 3, characterized in that radial ruled lines (46) formed in the upper region of the part and the region of the upper surface flap are provided. A state in which the first protrusion and the first adhesive margin are engaged and the second protrusion and the second adhesive allowance are engaged with the region on the opposite side of the upper surface of the second front portion The cutout portion (131) for exposing a part of the ruled line formed in the upper region of the first front portion to the front side is formed. Packaging box. In the box body portion, the first right side surface portion is formed to be inclined such that the angle between the inner surface and the upper surface of the bottom surface portion is an obtuse angle, and the first left side surface portion is the inner surface and the bottom surface portion. Formed so that the angle between the top surface and the top surface of the bottom surface is obtuse, and the back surface is formed so that the angle between the inner surface and the top surface of the bottom surface portion is obtuse,
In the lid portion, the second right side surface portion is formed so as to be inclined so that an angle between the inner surface and the inner surface of the upper surface portion becomes an obtuse angle, and the second left side surface portion is formed on the inner surface and the upper surface. It is formed inclining so that the angle between the inner surface of a part may become an obtuse angle, The 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 characterized by the above-mentioned Packaging box. A first folding piece (52) is provided between the right side of the first front portion and the front side of the first right side, and the first folding piece is folded in half. 1 Adhered to the outer surface of the right side,
A second folded piece (54) is provided between the right side of the first back side and the back side of the first right side, and the second folded piece is folded in half. 1 Adhered to the outer surface of the right side,
A third folded piece (62) is provided between the left side of the first front portion and the front side of the first left side, and the third folded piece is folded in half. 1 Adhered to the outer surface of the left side,
A fourth folded piece (64) is provided between the left side of the first back surface and the back side of the first left side, and the fourth folded piece is folded in half. The packaging box according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, which is adhered to an outer surface of the left side surface portion.

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