Box before box-making, and blank sheet for forming the same

Abstract

To provide a box before box-making, that is provided with a commodity holding plate capable of not only facilitating taking out a commodity but also displaying the commodity to the maximum, and to provide a blank sheet therefor.SOLUTION: A box before box-making according to the present invention comprises a second flap and a fourth flap for closing a fourth peripheral wall, and part of both-ends openings at a cylindrical part via continuous connection to both end edges of a second peripheral wall plate and a fourth peripheral wall plate from a first peripheral wall plate capable of forming the cross-sectional substantially rectangle-shaped cylindrical part by folding a side edge formed between peripheral wall plates connected in one direction; and a side plate and a folding flap for closing the openings, that are provided on a third peripheral wall plate. The box is made possible to be held by providing one or more valley-fold lines for recessing the first peripheral wall plate in parallel to a side edge, on the first peripheral wall plate; by inwardly folding the folding flap onto insides of the second flap and the fourth flap by folding the second flap and the fourth flap and by erecting the side plate in a state of folding valley-fold lines and ridge-folding the first peripheral wall; and by forming a pair of tilted plates tilted toward the valley-fold lines by the first peripheral plate.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a pre-folded box and a blank sheet for forming the same. [Background technology]

[0002] Conventionally, when storing one or more products in a packaging box, packaging boxes have been widely used that use partition plates to prevent the products from moving around inside the case, or that have a flat inner plate in the middle of the depth of the packaging box that can form an opening to match the outer shape of the product. Summary of the Invention [Problem to be solved by the invention]

[0003] However, when a packaging box with only a divider is used to store a cylindrical product, it can be difficult to keep the display facing upward or forward when the product is placed inside the packaging box. Also, in order to keep the product facing the desired side in a packaging box using a divider, the product needs to be packed tightly, which can make it difficult to remove the product. Furthermore, in the case of a packaging box in which a flat inner plate capable of forming an opening according to the outer shape of the product is provided in the middle of the depth of the packaging box, if the inner plate is placed in a shallow position in the packaging box, the product is not held firmly, and if the inner plate is placed in a deep position in the packaging box, the product is not sufficiently exposed, the displayed portion is reduced, and the appearance is unattractive. Therefore, the present invention provides a pre-made box having a product holding plate that makes it easy to hold and remove products and maximizes the display of products, and a blank sheet that can be used to form the pre-made box. [Means for solving the problem]

[0004] The pre-made box of the present invention comprises first to fourth peripheral wall plates that are connected in one direction and can form a tubular portion that is generally rectangular in cross section by folding the side edges formed between the peripheral wall plates; second and fourth flaps that are connected to both end edges of the second and fourth peripheral wall plates and close part of the openings at both ends of the tubular portion; side plates that are provided on the third peripheral wall plate and close the openings, and fold-in flaps that are provided at the tips of the side plates; the first peripheral wall plate has one or more valley fold lines that are parallel to the side edges and that concave the first peripheral wall plate; the first peripheral wall plate is folded along the valley fold lines to form a valley fold on the first peripheral wall plate, and when the second and fourth flaps and the side plates are raised, the fold-in flaps are folded inside the second and fourth flaps, and the first peripheral wall plate forms a pair of inclined plates that are inclined toward the valley fold lines and can be held in place. According to this configuration, the first peripheral wall portion having the inclined plate for holding the packaged item can be formed firmly and beautifully with a single sheet.

[0005] The pre-made box of the present invention may have a first flap formed on both end edges of each of the pair of inclined plates, and the first flap may be folded so as to block at least a portion of the opening when the first peripheral wall plate is in a valley fold, and a portion of the outer edge of the first flap may contact the inner surface of the third peripheral wall plate, thereby maintaining the inclination angle of the pair of inclined plates. According to this configuration, the inclination angle of the first peripheral wall plate can be stably maintained.

[0006] A portion of the second flap and the fourth flap of the pre-made box of the present invention may protrude above the pair of inclined plates when the first peripheral wall plate is folded in a valley fold at a predetermined angle. This configuration makes it easy to insert the fold-in flap inside the second flap and the fourth flap.

[0007] A slit is formed in the first peripheral wall plate of the pre-carton box of the present invention, into which the packaged item can be inserted, and the slit may be formed on both sides of a pair of inclined plates having a pair of inclined surfaces, and may be arranged so that the product can be held across the pair of inclined plates. This configuration allows the packaged item to be held stably and makes the display of the packaged item appear larger.

[0008] The folding flap of the pre-made box of the present invention may be formed to a size that can cover the entire opening shape surrounded by an imaginary upper plate surface connecting the side edges and the end edges of the first peripheral wall plate and the pair of inclined plates when the first peripheral wall plate is valley-folded at a predetermined angle. This configuration prevents the fold-in flap from coming off.

[0009] The cylindrical portion may be formed by connecting the edge of the first peripheral wall plate and the edge of the fourth peripheral wall plate of the pre-made box of the present invention, and a cover plate may be connected to the edge of the fourth peripheral wall plate to cover the entire valley-folded first peripheral wall plate when viewed in plan. This configuration makes it easier to close the packaging box.

[0010] The lid plate of the pre-formed box of the present invention may have lid plate flaps formed on both side edges thereof, which are folded and attached to the inside of the lid plate. This configuration increases the rigidity of the cover plate and prevents the cut end surface of the cover plate from being exposed.

[0011] The blank sheet of the present invention forms any of the above-described boxes before being made into a box. [Effects of the Invention]

[0012] The pre-formed box and the blank sheet from which the pre-formed box can be formed according to the present invention have the effect of making it easy to hold and take out products, and maximizing the display of the products. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a diagram showing a blank sheet of a box before being made into a box according to an embodiment of the present invention, viewed from the inside. FIG. [Figure 2] FIG. 2 is an enlarged view of the first peripheral wall plate of FIG. 1. [Figure 3] 10A to 10C are diagrams illustrating a process for producing a box before being manufactured according to an embodiment of the present invention. [Figure 4] 1A and 1B are diagrams illustrating a process for producing a box before being manufactured according to an embodiment of the present invention. [Figure 5] 10A to 10C are diagrams illustrating a process for forming a packaging box using a pre-formed box according to one embodiment of the present invention. [Figure 6] 10A to 10C are diagrams illustrating a process for forming a packaging box using a pre-formed box according to one embodiment of the present invention. [Figure 7] 10A to 10C are diagrams illustrating a process for forming a packaging box using a pre-formed box according to one embodiment of the present invention. [Figure 8] 10A to 10C are diagrams illustrating a process for forming a packaging box using a pre-formed box according to one embodiment of the present invention. [Figure 9] 1 is a perspective view showing a state in which a packaging box according to an embodiment of the present invention is opened. [Figure 10] 1 is a perspective view showing a state in which a packaging box according to an embodiment of the present invention is closed. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the pre-formed box and the blank sheet forming the same of the present invention will be described with reference to the drawings. Note that the dimensions of each part in the drawings used in the following description are not necessarily the same as the actual dimensions and can be changed as appropriate.

[0015] FIG. 1 is a view of a blank sheet 1a of a box before being made into a box according to one embodiment of the present invention, viewed from the inside.

[0016] As shown in Figure 1, a blank sheet 1a of one embodiment of the present invention mainly comprises a first peripheral wall plate 2 to a fourth peripheral wall plate 5, a lid plate 6 and a cover plate 7 connected in one direction (the direction of the arrow), and flaps 12, 13, 15 and a side plate 14 connected to both end edges of the first peripheral wall plate 2, etc.

[0017] The first peripheral wall plate 2, the second peripheral wall plate 3, the third peripheral wall plate 4, the fourth peripheral wall plate 5, the lid plate 6 and the cover plate 7 are arranged in one direction. The first peripheral wall plate 2, the second peripheral wall plate 3, the third peripheral wall plate 4 and the fourth peripheral wall plate 5 are capable of forming the tubular portion 10 shown in FIG. 6 in the process of assembling the packaging box 30 shown in FIG.

[0018] 1, the first peripheral wall plate 2 is formed into a flat, roughly rectangular shape before being made into a box. More specifically, the outer shape of the first peripheral wall plate 2 is surrounded by a side edge 2e and a side edge 2b that extend parallel to each other, and a pair of end edges 11, 11 that connect both ends of the side edge 2e and the side edge 2b.

[0019] The edge 11 has shallow mountain-shaped folding lines 11a and 11b near the center in the extension direction so as to slightly protrude outward. Two rectangular fitting portions 16 are provided in the flat surface of the first peripheral wall plate 2 at an interval in the direction between the end edges 11, 11.

[0020] As shown in FIG. 2, the fitting portion 16 is formed in a rectangular shape surrounded by four corners each having a rounded slit 16c and bending lines 17 and 18 connecting the slits 16c, 16c at the four corners. Inside the rectangular shape of the fitting portion 16, a diamond-shaped central hole 19 and slits 20 and 21 extending from each corner of the central hole 19 are formed.

[0021] A slit 20 extending from the corner of the central hole 19 projecting toward the end edge 11 extends along the center line between the side edge 2 e and the side 2 b and reaches the long side 17 of the fitting portion 16 . Between the peaks t, t of the mountain shapes of the end edges 11, 11 of the first peripheral wall plate 2, there is a valley fold line 22 passing through the slit 20 and the central hole 19.

[0022] The slit 21 extending from the corner of the central hole 19 protruding toward the side edge 2e and the side edge 2b extends perpendicular to the short side 18, then branches off toward the end p on the long side 17 side of the curved slit 16c, and is connected to the end p.

[0023] As a result, the insertion portion 16 has two pentagonal side support flaps 23 extending in opposite directions from the parallel long sides 17, 17, and two more adjacent support flaps 23, and approximately triangular upper and lower support flaps 24 extending in opposite directions from the short sides 18, 18.

[0024] The side support flap 23 is formed into a pentagon with the folding line on the long side 17 as its lower base and a slit parallel to this as its upper base, and the corner of the trapezoid is missing by the central hole 19. The side support flap 23 is also formed so that when it is folded approximately perpendicular to the bottom surface after being assembled into the packaging box, the upper base of the trapezoid either comes into contact with the bottom surface or follows the bottom surface with a small gap.

[0025] When an item to be packed, such as a commodity, is pushed into the insertion portion 16 to fit, the side support flaps 23 and the upper and lower support flaps 24 bend and open toward the opposing bottom side (i.e., the third peripheral wall plate 4 side) in response to the pushing, and come into contact with the item to be packed, holding the item by the friction.

[0026] The upper and lower support flaps 24 are configured to hold the upper and lower ends of the packaged item by appropriately biting into the curved slits 16c. The first peripheral wall plate 2 is located at the extreme end in one direction and has a joining margin 8 for connecting to the fourth peripheral wall plate 5 at the side edge 2e opposite to the side edge 2b to which the second peripheral wall plate 3 is connected.

[0027] First flaps 12, 12 are connected to both end edges 11 of the first peripheral wall plate 2. The first flap 12 is surrounded by a cut edge 12a extending on the extension of the valley fold line 22, an inner inclined edge 12b extending from the tip of the cut edge 12a at an angle upward along the extension of the side edge 2b or the side edge 2e, a tip edge 12c extending approximately parallel to the long side of the insertion portion 16, and an outer inclined edge 12d extending from the tip edge 12c toward the end of the side edge 2b or the side edge 2e.

[0028] This first flap 12 is connected to the end edges 11a and 11b, which are inclined around the peak t of the mountain shape of the end edge 11, so as to be symmetrical with respect to a line passing through the center between the side edge 2b and the side edge 2e of the first peripheral wall plate 2.

[0029] The notched edges 12a of two symmetrically adjacent first flaps 12 are adjacent along a valley fold line 22. The adjacent inner inclined edges 12b extend away from the notched edges 12a at a predetermined angle. The predetermined angle is set so that the inner inclined edges 12b form a substantially straight line when the first peripheral wall panel 2 is valley-folded along the valley fold line 22 as described below and the first flaps 12 are folded toward the third peripheral wall panel 4 at their edges 11a and 11b. As a result, when the first peripheral wall panel 2 is valley-folded during box making, the inner inclined edges 12b are either in contact with the inner surface (bottom surface) of the third peripheral wall panel 4 or along the bottom surface with a very small gap.

[0030] As shown in FIG. 1, the second peripheral wall plate 3 is formed into a trapezoid surrounded by the side edge 2b as an upper base, the side edge 3b that is parallel to the side edge 2b and longer than the side edge 2b as a lower base, and the inclined edges 3a, 3a that connect both ends of the side edge 2b and the side edge 3b.

[0031] The edges 3a, 3a of the second peripheral wall plate 3 are inclined at approximately the same angle relative to the side edge 3b. An insertion slit 9 is formed in the center of the extension direction of the side edge 3b. In the center of the insertion slit 9, a roughly semicircular finger hole is formed. A second pentagonal flap 13 is connected to the edge 3a of the second peripheral wall plate 3, like a trapezoid with the corners of the lower base side cut off.

[0032] The second flap 13 is formed by being surrounded by the edge 3a, an upper edge 13a that extends from the end of the side edge 2b and roughly follows the inner surface (top surface) of the cover plate 6 when the box is made, an inclined edge 13b, an inclined edge 13c that is roughly parallel to the edge 3a, and an inclined edge 13d that roughly follows the inner surface (bottom surface) of the third peripheral wall plate 4 when the box is made. The second flaps 13 are connected to the inclined sides 3a, 3a of the second peripheral wall plate 3 so as to be symmetrical with respect to a line passing through the centers of the side sides 2b, 3b of the second peripheral wall plate 3.

[0033] The third peripheral wall plate 4 is formed in a rectangular shape surrounded by straight side edges 3b, 4b and a straight edge 4a, and serves as the bottom plate of the packaging box. The side edges 3b, 4b of the third peripheral wall plate 4 are longer than the side edge 2b of the first peripheral wall plate 2. The dimension between the side edges 3b, 4b of the third peripheral wall plate 4 (hereinafter also referred to as the "width direction" in this specification) is formed so as to be approximately the same as the dimension between the side edge 2e and the side edge 2b of the first peripheral wall plate 2 when flattened (hereinafter also referred to as the "width direction" in this specification).

[0034] A generally trapezoidal side plate 14 is connected to the edge 4a of the third peripheral wall plate 4. The side plate 14 is bounded by a lower base defined by the edge 4a, an upper base defined by a tip edge 14a that is shorter than the lower base, and inclined sides 14b, 14b extending at the same inclination angle from both ends of the lower base.

[0035] The side panel 14 is formed in a trapezoidal shape that can cover almost the entire opening portion surrounded by the edges 3a-5a of the second peripheral wall panel 3 to the fourth peripheral wall panel 5 and the edge 6a of the cover panel 6 when the packaging box is assembled, as described below.

[0036] A fold-in flap 25 having a substantially isosceles triangle shape with the tip edge 14a as its base is connected to the tip edge 14a of the side panel 14. The width of the fold-in flap 25 is substantially the same as the width of the first peripheral wall panel 2, but the triangular shape is slightly larger than the shape of the substantially V-shaped edge 11 of the first peripheral wall panel 2 that is valley-folded during box making.

[0037] The fourth peripheral wall plate 5 is formed symmetrically to the second peripheral wall plate 3 (bilaterally symmetrical in FIG. 1), and is connected to the side edge 4b. Fourth flaps 15 are connected to both end edges 5a of the fourth peripheral wall plate 5.

[0038] The fourth flap 15 is formed into a substantially parallelogram shape by an end edge 5a, a leading edge 15a substantially parallel to the end edge 5a, an inclined side 15b that substantially follows the inner surface of the third peripheral wall plate 4 when the box is made, and an inclined side 15d that is substantially parallel to the inclined side 15b and follows the inner surface (or top surface) of the cover plate 6 when the box is made. The fourth flap 15 is formed so as to be symmetrical with respect to a line passing through the center of the side edge 5b.

[0039] The cover plate 6 is formed into a rectangle by side edges 5b, 6b having substantially the same dimensions as the side edge 2b of the first peripheral wall plate 2 and edge edges 6a, 6a having substantially the same dimensions as the width dimension of the first peripheral wall plate 2.

[0040] A folding portion (lid plate flap) 17 is connected to the edge 6a of the lid plate 6. Folding portion 17 extends parallel to inclined side 15d with a gap therebetween, and is surrounded by bending line 17b extending substantially perpendicular to edge 6a, leading edge 17a extending substantially parallel to edge 6a, and inclined side 17d extending at a slight angle toward the end of side 6a. The protruding dimension of folding portion 17, i.e., the dimension from edge 6a to leading edge 17a, is set to be smaller than half the dimension between edges 6a, 6a of cover plate 6. The folding portion 17 is provided so as to be symmetrical with respect to a line passing through the center of the side edges 5b and 6b. A cover plate 7 having substantially the same shape as the second peripheral wall plate 3 and capable of covering the entire second peripheral wall plate 3 is connected to the side edge 6b of the cover plate 6.

[0041] An insertion piece 27 is provided on the side edge 7e of the cover plate 7 to be inserted into an insertion slit 9 formed in the side edge 3b. A folding line is formed between the insertion piece 27 and the cover plate 7. The blank sheet 1a can be made of a paper base material with a certain degree of rigidity or a resin base material that can be folded. The blank sheet 1a of the box before being made into a box has the above-mentioned structure, and is formed symmetrically as a whole when viewed along a line passing through the center of the side edge 2b and the side edge 6b.

[0042] Next, a method for forming the pre-box 1 will be described. As shown in Figure 3, before the box is manufactured, the blank sheet 1a is folded at the side edge 2b between the first peripheral wall plate 2 and the second peripheral wall plate 3, and the inner surface of the first peripheral wall plate 2 is overlapped with the inner surfaces of the second peripheral wall plate 3 and the third peripheral wall plate 4 (partially overlapping the third peripheral wall plate 4). Although the timing is not particularly limited, it is advisable to apply adhesive to the outer surface of the joining margin 8 at this point. The folding portion 17 of the cover plate 6 has an adhesive applied to its inner surface, and is folded over and stuck to the inner surface of the cover plate 6.

[0043] 4(a), the blank sheet 1a is further folded at the side edge 4b, and the fourth peripheral wall plate 5 is placed on the inner surface of the third peripheral wall plate 4. In this way, since the widths of the first peripheral wall plate 2 and the third peripheral wall plate 4 are approximately the same, and the widths of the second peripheral wall plate 3 and the fourth peripheral wall plate 5 are also approximately the same, the side edge 5b of the fourth peripheral wall plate 5 and the side edge 2e of the first peripheral wall plate 2 are approximately overlapped vertically. Therefore, the end of the fourth peripheral wall plate 5 on the side edge 5b side overlaps the joint margin 8 and is adhered thereto.

[0044] Then, as shown in FIG. 4(b), the lid plate 6 and the cover plate 7 are bent at the side edge 5b to open them. With the above steps, the pre-box 1 is completed.

[0045] To convert the pre-formed box 1 into a packaging box, the pre-formed box 1, which is in a flat state as shown in Figure 5, is raised up relative to the third peripheral wall plate 4 as shown in Figure 6, to form a cylindrical portion 10 that is approximately rectangular when viewed from the penetration direction and is surrounded by the first peripheral wall plate 2 to the fourth peripheral wall plate 5.

[0046] To facilitate folding of the first flap 12, it is preferable to provide creases on the end edges 11a and 11b. It is also preferable to provide creases on the valley fold line 22 of the first peripheral wall plate 2. 7, the first peripheral wall plate 2 is valley-folded along the valley fold line 22, and the first flap 12 is folded at the edges 11a and 11b. Note that either the valley folding of the first peripheral wall plate 2 or the folding of the first flap 12 at the edges 11a and 11b can be performed first. By folding the first peripheral wall plate 2 at the valley fold line 22, the first peripheral wall plate 2 is recessed in a generally V-shape toward the third peripheral wall plate 4, forming inclined plates 2x, 2x. Accordingly, the second peripheral wall plate 3 and the fourth peripheral wall plate 5 are inclined at the same angle so as to approach each other.

[0047] In addition, by folding the four first flaps 12 toward the third peripheral wall plate 4, the inner inclined edges 12b, 12b of each flap are aligned approximately along the inner surface of the third peripheral wall plate 4, and the outer inclined edges 12d are aligned approximately along the edge 3a, 5a of the second peripheral wall plate 3 or the fourth peripheral wall plate 5, thereby covering the inside of the opening surrounded by the valley-folded first peripheral wall plate 2 and second peripheral wall plate 3 to the fourth peripheral wall plate 5. With this configuration, even if the first peripheral wall plate 2 is pressed from its outer surface, the first flap 12 is supported between the end edges 11a, 11b and the third peripheral wall plate 4, which forms the bottom, so that the valley-folded shape of the first peripheral wall plate 2 is firmly maintained.

[0048] After folding the first flap 12, the second flap 13 and the fourth flap 15 are folded as shown in Fig. 8. The second flap 13 and the fourth flap 15 cover half to two-thirds of the opening surrounded by the valley-folded first peripheral wall plate 2 to the fourth peripheral wall plate 5 from the edge 3a, 5a, and also partially protrude and cover the gap between the inclined plates 2x, 2x of the first peripheral wall plate 2 and the cover plate 6 that will be placed behind.

[0049] After the second flap 13 and the fourth flap 15 are folded, the side plate 14 is raised and placed on the second flap 13 and the fourth flap 15. In this state, the leading edge 14a of the side panel 14 substantially overlaps the upper edge 13a of the second flap 13 and the upper edge 15d of the fourth flap 15, which are substantially aligned with the upper edges, i.e., the side edges 2b, 4b, of the second peripheral wall panel 3 and the fourth peripheral wall panel 5. That is, the side edge 2e and the side edge 2b of the first peripheral wall panel 2 are shorter than those of the third peripheral wall panel 4, and the first peripheral wall panel 2 is made narrower than the third peripheral wall panel 4 by being folded inward. Therefore, when the side panel 14 overlaps the second flap 13 and the fourth flap 15, the side panel 14 is slightly inclined inwardly of the inner surface of the third peripheral wall panel 4, and the leading edge 14a becomes substantially aligned with the height of the upper edges of the second peripheral wall panel 3 and the fourth peripheral wall panel 5.

[0050] In this state, the fold-in flap 25 is folded back so as to face the inner surfaces of the second flap 13 and the fourth flap 15 as shown by the arrow in Figure 8, and inserted between the first flap 12 and the second flap 13 and the fourth flap 15.

[0051] At this time, the triangle of the fold-in flap 25 is formed slightly larger than the V-shaped recess formed by the inclined surface of the first peripheral wall plate 2, and the edges 11a, 11b of the first peripheral wall plate 2 protrude slightly in a mountain shape. Therefore, the fold-in flap 25 is folded while being pressed against the inclined surface of the first peripheral wall plate 2 while being slightly curved and deformed.

[0052] As shown in Figure 9, when the folding flap 25 goes beyond contact with the inclined surface of the first peripheral wall plate 2 and reaches between the first flap 12, the second flap 13, and the fourth flap 15, it releases its curve, flattens, and becomes inserted.

[0053] As a result, the cut end faces of the paper base material of the raised second peripheral wall plate 3, fourth peripheral wall plate 5, side plate 14, and first peripheral wall plate 2 are not exposed at the top edges, and a continuous smooth outer surface folded between the other peripheral wall plates or flaps appears as the opening K of the packaging box 30. Then, the first peripheral wall plate 2 forms a roughly V-shaped recessed storage section S for the packaged item, and the packaging box 30 is completed with the lid plate 6 open.

[0054] The item to be packed is pushed into the insertion section 16 together with the side receiving flaps 23 and upper and lower receiving flaps 24 formed on the first peripheral wall plate 2 and fixed so as not to move, and then the lid plate 6 covers and closes the storage section S. Then, the cover plate 7 is placed on the outer surface of the second peripheral wall plate 3 as shown by the arrow in Figure 10, and the insertion piece 27 is inserted into the insertion slit 9, completing the packaging box 30 containing the item to be packed.

[0055] In this way, with the blank sheet 1a for the pre-made box of the present invention, the pre-made box 1 can be formed extremely easily by simply folding two parts of a single sheet and attaching the opposing parts to the joint 8 with adhesive or double-sided tape.

[0056] Furthermore, the pre-made box 1 of the present invention can be made into a packaging box 30 very easily by simply raising the second peripheral wall plate 3 and the fourth peripheral wall plate 5 to form the tubular portion 10, making a valley fold on the first peripheral wall plate 2, and then closing each flap at the opening of the tubular portion 10.

[0057] Furthermore, when the box 1 before being manufactured is made into a packaging box 30, the cut surfaces of the paper substrate are not exposed around the entire periphery of the opening K shown in Figure 9 and the entire outer periphery of the recessed first peripheral wall plate 2, and a beautiful, smooth, continuous outer surface is revealed by folding between the peripheral walls or between the side plate 14 and the flap. This has the effect of enhancing the luxurious feel of the packaging box 30 when the cover plate 6 is opened. The packaging box also has a beautiful truncated pyramidal shape.

[0058] Furthermore, since the first peripheral wall plate 2 of the box 1 before being manufactured is recessed so that the inclined plates 20x, 20x are formed during the box manufacturing process, a pair of ends, such as the upper and lower ends of the packaged item, can be held deeply while exposing the area between them as much as possible. Therefore, even if the packaging box 30 is made of a paper base material, it has the effect of being able to hold the product firmly while maximally showing the markings, such as pictures and letters, on the packaged item.

[0059] Additionally, the first peripheral wall panel 2 is formed in a mountain shape with the edge 11 projecting slightly outward. Therefore, the box 1 before being made into a box can prevent a gap from being formed between the side panels 14, which stand up while tilting slightly inward during box making, and the fold-in flaps 25 that are folded while being sandwiched between the side panels 14 and the second and fourth flaps 13 and 15, and can firmly hold the fold-in flaps 25.

[0060] Furthermore, since the fold-in flap 25 is formed to have a shape similar to the recessed shape of the first peripheral wall plate 2 but slightly larger than the recessed shape, the outer edge of the fold-in flap 25 can be inserted below the first peripheral wall plate 2, thereby preventing the fold-in flap 25 from becoming loose.

[0061] Furthermore, because parts of the second flap 13 and the fourth flap 15 protrude above the inclined plate of the valley-folded first peripheral wall plate 2, the fold-in flap 25 can be easily folded and inserted between the second flap 13 and the fourth flap 15 and the first peripheral wall plate 2. In other words, the above configuration has the effect of facilitating the assembly of the packaging box 30.

[0062] In addition, since the cover plate 6 is connected to the side edge 5b of the fourth peripheral wall plate 5, the storage section S can be easily opened, closed, and maintained, and the cut end surface of the fourth peripheral wall plate 5, which may appear if the cover plate 6 is provided separately, can be prevented from appearing. In addition, folding portions 17 are formed on both end edges 6a of the cover plate 6 and are attached to the inner surface of the cover plate 6, which increases the rigidity of the cover plate 6 and prevents the cut end surfaces of the cover plate 6 from being exposed.

[0063] Furthermore, a cover plate 7 is further connected to the leading edge of the lid plate 6, and an insert piece 27 is inserted into the side edge 3b of the third peripheral wall plate 4, which forms the bottom. This prevents the cut end faces of the paper base material from appearing on the four sides of the lid plate 6, which are the most noticeable when the packaging box 30 is closed, thereby improving the aesthetic appeal of the packaging box.

[0064] In the above embodiment, an example is shown in which the insertion portion 16 is formed in a rectangular shape with rounded corners and is provided on the first peripheral wall plate 2, but the insertion portion 16 is not limited to a rectangular shape as long as the packaged item is held across a pair of inclined portions of the first peripheral wall plate and is formed to match the shape of the packaged item.

[0065] The shapes of the central hole 19 and slits 20, 21 formed in the fitting portion 16 can also be set appropriately according to the shape of the packaged object to be accommodated. The number of fitting portions 16 can also be formed appropriately according to the size of the packaged object and / or the size of the packaging box.

[0066] Furthermore, the valley fold line 22 formed on the first peripheral wall plate is not limited to one, but may be formed in two so as to form the bottom of the valley fold, or may be formed in three so as to form the bottom of the valley fold in an approximately W-shape. Furthermore, it is preferable that the first flap 12 be provided on the first peripheral wall plate 2, but this is not essential. Furthermore, it is preferable that the first peripheral wall plate is formed with the fitting portion 16 and the slits 20, 21, etc., as shown in the above embodiment, but this is not essential. [Explanation of symbols]

[0067] 1 Pre-folded box 1a Blank sheet of box before folding 2 1st peripheral wall plate 3 Second peripheral wall plate 4 Third peripheral wall plate 5 4th peripheral wall plate 6 Lid plate 7 Cover plate 12 First flap 13 Second flap 14 Side panel 15 4th flap 17 Folding part (lid flap) 20,21 Slit 22 Valley fold line 25 Fold-in flap

Claims

1. first to fourth peripheral wall plates that are connected in one direction and can form a tubular portion that is generally rectangular in cross section by bending side edges formed between the peripheral wall plates; second flaps and fourth flaps connected to both end edges of the second peripheral wall plate and the fourth peripheral wall plate, respectively, for closing a part of the openings at both ends of the cylindrical portion; a side plate provided on the third peripheral wall plate to close the opening, and a fold-in flap provided at a tip of the side plate, The first peripheral wall plate is provided with one or more valley fold lines parallel to the side edges and recessing the first peripheral wall plate, The pre-made box can be held by folding the valley fold line to form a valley fold on the first peripheral wall plate, folding the second and fourth flaps, and raising the side plates to fold the fold-in flaps inside the second and fourth flaps, and forming a pair of inclined plates inclined toward the valley fold line with the first peripheral wall plate.

2. First flaps are formed on both end edges of each of the pair of inclined plates, 2. The pre-formed box according to claim 1, wherein the first flap is folded so as to block at least a portion of the opening when the first peripheral wall plate is in a valley fold, and a portion of the outer edge of the first flap contacts the inner surface of the third peripheral wall plate, thereby maintaining the inclination angle of the pair of inclined plates.

3. 2. The pre-formed box according to claim 1, wherein a portion of the second flap and a portion of the fourth flap protrude above the pair of inclined plates when the first peripheral wall plate is folded in a valley fold at a predetermined angle.

4. The first peripheral wall plate has a slit formed therein into which the packaged item can be inserted, 2. The pre-formed box according to claim 1, wherein the slits are formed on both sides of a pair of inclined plates having a pair of inclined surfaces, and are arranged so that the product is held across the pair of inclined plates.

5. 2. The pre-folded box according to claim 1, wherein the fold-in flap is formed to a size that can cover the entire opening shape surrounded by an imaginary upper plate surface connecting the side edges and the end edges of the first peripheral wall plate and the pair of inclined plates when the first peripheral wall plate is valley-folded at a predetermined angle.

6. an end edge of the first peripheral wall plate and an end edge of the fourth peripheral wall plate are connected to form the cylindrical portion; 2. The box according to claim 1, wherein a cover plate is connected to the edge of the fourth peripheral wall plate so as to cover the entire first peripheral wall plate, which is valley-folded, in a plan view.

7. 7. The box according to claim 6, wherein the lid plate has lid plate flaps formed on both side edges thereof, the lid plate being folded and attached to the inside of the lid plate.

8. A blank sheet for forming a pre-folded box according to any one of claims 1 to 7.

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