Folding boxes for packaging

Abstract

To provide a folding box for packaging, which can reduce the impact that stored items receive from the bottom side of the box when the box is placed upright. [Solution] In the assembled state, the storage section of the folding box 1 has a cylindrical section surrounded by four side walls 11-14 from above the bottom of the folding box 1 to the periphery of the bottom, and at least the centre of the bottom in a plan view is located above the periphery of the bottom, the bottom is made up of four bottom component pieces 15-18 extending from the lower end edges of each of the side walls 11-14, and the entire folding box 1 is formed from a single sheet of paper or plastic.

Description

[Technical Field]

[0001] The present invention relates to an improvement in folding boxes for packaging. [Background technology]

[0002] A typical folding box for packaging is a box body having multiple sides and a bottom formed by folding a single piece of paper, and the bottom is composed of multiple bottom-constituting pieces formed on the piece of paper (flaps 21 to 24 shown in Figures 3 and 6 of Patent Document 1). At least the bottom portion of the box is cylindrically formed by the plurality of side wall pieces. The bottom is formed by assembling a plurality of bottom pieces extending from the lower ends of each side.

[0003] For example, the conventional folding packaging box n1 shown in Figure 7(A) is formed from a single piece of paper n10, as shown in the developed view (Figure 8(A)), and includes four side walls n11 to n14, bottom constituent pieces n15 to n18 extending from one end (lower end edge) of each side wall n11 to n14, a lid piece n22 extending from the other end (upper end edge) of one side wall (second side wall n12), two side walls (first and third side walls n11, n13) adjacent to that side wall (second side wall n12), flap pieces n23, n24 extending from the other ends (upper end edges) of the two adjacent side walls (first and third side walls n11, n13), and a tongue piece n25 provided on the tip side of the lid piece n20. In this example, an adhesive tab n19 is provided extending from the edge of the fourth side wall n14 located opposite to the third side wall n13. FIG. 8(A) shows the back side of the piece of paper n10 in the unfolded folding packaging box n1, and the dashed dotted lines in FIG. 8(A) indicate valley fold lines.

[0004] In each bottom component piece n15 to n18, glue is applied to the surface side of the adhesive strip n19, and adjacent side walls n11 to n14 are folded at vertical fold lines nv1 to nv4, which serve as the boundary lines between the side walls n11 to n14, so that the end edge (left end edge) of the first side wall n11 faces the end edge (right end edge) of the fourth side wall piece n14 and the back side of the first side wall n11 is attached to the surface side of the adhesive strip n19, thereby forming a rectangular (square) tube in cross section with the side walls n11 to n14. The horizontal crease lines nv5 to nv8, which are the boundary lines between the side walls, form a straight line. That is, the crease lines nv5 to nv8 are arranged on the same straight line (imaginary line).

[0005] Among the four bottom constituent pieces n15-n18, opposing constituent pieces have the same contour shape. In this example, the contours of the first bottom constituent piece n15 extending from the first side wall n11 and the third bottom constituent piece n17 extending from the third side wall piece n13 are unequal-legged trapezoids with their respective horizontal fold lines nv5 and nv7 as their lower bases (base edges), and the heights of the trapezoids are both half the length of one side of the quadrangle (square). In the first bottom constituent piece n15, the leg n15a of the trapezoid connected to the vertical end side n11a opposite the second side wall piece n12 is longer than the other leg n15b of the trapezoid. In the third bottom constituent piece n17, the leg n17a of the trapezoid connected to the vertical valley fold line nv2 opposite the fourth side wall piece n14 is longer than the other leg n17b of the trapezoid.

[0006] On the other hand, the second bottom component piece n16 extended from the second side wall n12 and the fourth bottom component piece n18 extended from the fourth side wall piece 14 form approximately right-angled triangles with their respective horizontal fold lines nv6, nv8 as right-angled sides, and protruding pieces n20, n21 extend from the hypotenuse of the right-angled triangle. The hypotenuse of the second bottom component piece n16 having the protruding piece n20 faces the first bottom component piece nv15 side of the right triangle, and the shorter leg n15b of the trapezoid formed by the first bottom component piece n15 faces the second bottom component piece n16 side. The hypotenuse of the fourth bottom component piece n18, which has the protruding piece n21, faces the third bottom component piece n17 side of the triangle, and the shorter leg n17b of the trapezoid formed by the third bottom component piece n17 faces the fourth component piece n18 side. Regarding the right-angled triangles formed by the second bottom component piece n16 and the fourth bottom component piece n18, the protruding pieces n20 and n21 of each of the hypotenuses n16a and n18a of the right-angled triangles are rounded toward the tip, and the corners of the apexes at the tips are rounded off, so although they cannot strictly be called right-angled triangles, for the sake of convenience of explanation, they will be referred to as right-angled triangles here as an approximate shape.

[0007] In the second bottom component piece n16, the intersection np1 between the rounded contour portion of the hypotenuse n16a and the protruding piece n20 (base end) is located equidistant from both ends of the horizontal fold line nv6 (one side of the right triangle), and each of these distances is half the length of the diagonal of the quadrangle (square) formed by the cross section of the tube formed by the side walls n11 to n14. In the fourth bottom component piece n18, the intersection np2 between the rounded contour portion of the hypotenuse n18b and the protruding piece n21 (base end) is also located equidistant from both ends of the horizontal fold line nv8 (one side of the right triangle), and each of these distances is half the length of the diagonal of the quadrangle (square) formed by the cross section of the tube formed by the side walls n11 to n14.

[0008] As described above, during assembly, the side walls n11 to n14 are valley-folded along the vertical creases nv1 to nv4, and the back side of the first side wall n11 is attached to the front side of the adhesive strip n19, forming a tube with the side walls n11 to n14. As the tube is formed, when the bottom constituent pieces n15 to n18 are valley-folded along the horizontal creases nv5 to nv8 relative to the side walls n11 to n14, the third bottom constituent piece n17 is superimposed on the protruding piece n21, the tip end of the second bottom constituent piece n16 is superimposed on the third bottom constituent piece n17, the first bottom constituent piece n15 is superimposed on the protruding piece n20, and the tip end of the fourth bottom constituent piece n18 is superimposed on the first bottom constituent piece n15 (FIGS. 8(A) to 8(C)). In the above-mentioned stacking of the bottom constituent pieces n15 to n18, the intersection np1 between the tip side of the second bottom constituent piece n16 and the protruding piece n20 and the intersection np2 between the tip side of the fourth bottom constituent piece n18 and the protruding piece n21 are butted together to form a flat bottom for the folding box n1 for packaging. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Utility Model Registration No. 3142471 Summary of the Invention [Problem to be solved by the invention]

[0010] The item g stored in the folding box n1 is separated from the surface on which the folding box n1 is placed by only a small distance equivalent to the thickness of the four bottom constituent pieces n15 to n18 stacked horizontally, and there is a risk that the item g may be damaged by an impact from the surface when the box is placed upright (FIG. 8(C)). For example, if the item g is a bottle (FIG. 7(B)), the bottom of the bottle may be damaged, or if the tube is stored with its cap (lid g1) facing down (FIG. 2(C)), the cap may be damaged.

[0011] On the other hand, as shown in Figure 7(B) and Figure 2(C), cosmetic containers are often elaborately decorated across their entire surfaces, attracting attention. However, in a folding box n1 having a window n26 covered with a transparent film sheet n26a for displaying the contents g, it is necessary to ensure the strength between the window n26 and the bottom of the folding box n1 and to provide an area for gluing the peripheral portion of the film sheet n26a to the folding box n1. Therefore, the side wall on which the window n26 is provided has a portion (areas n12a, n13a) that covers the area between the window n26 and the bottom of the folding box. The above-mentioned portion (areas n12a, n13a) that covers the area between the window n26 and the bottom hides the decoration of the lower part g10 of the container, reducing the appeal of the product (Figures 7(B)(C)). The present invention aims to solve the above problems by providing a folding packaging box that can avoid the above-mentioned impacts and the reduction in the appeal of the product. [Means for solving the problem]

[0012] The present invention provides a folding box for packaging in which, in an assembled state, the storage section of the folding box has a cylindrical portion surrounded by side walls extending from above the bottom of the folding box to the periphery of the bottom, and at least the center of the bottom is located above the periphery of the bottom when viewed in a plane. In addition, in this invention, at least the cylindrical portion is formed from a single sheet of paper or plastic having four side walls that form a tube with a substantially rectangular cross section and four bottom constituent pieces that extend from the lower edges of each side wall and form the bottom. In the sheet, the four side walls are connected to each other, and one of the side walls located at one end of the connecting direction, i.e., the continuous direction, has a glue tab extending in the continuous direction. The four connected side walls are folded between each other, and the side wall located at the other end of the connecting direction is glued to the glue tab, thereby forming the tube with a substantially rectangular cross section. During assembly, each bottom constituent piece is folded relative to the side walls, so that the bottom constituent pieces overlap each other. The bottom components are combined together, and a notch is provided at the tip of each of the pair of opposing bottom components.The bottom components are combined and the notch of the pair of opposing bottom components is hooked together to fix the bottom components in a folded state, thereby forming the bottom of the folding box.For each of the notches, the shortest distance from the base end of the bottom component piece on which the notch is provided is longer than half the length of the distance between the opposing base ends of the pair of bottom components on which the notch is provided, and both notches are hooked together above the base ends of each bottom component piece.A folding box for packaging has been provided in which the tip side of each combined bottom component piece, i.e., the center of the bottom, is positioned above the periphery of the bottom. Furthermore, in this invention, the entire box is formed from a single piece of paper or a single piece of plastic sheet, and each bottom component piece has a side edge that is inclined from the boundary with each side wall as its base end and that is inclined in the direction from the base end of the bottom component piece to the tip of the bottom component piece, and the inclination of the side edge causes each bottom component piece to gradually narrow in width as it moves from the base end to the tip, and each of the bottom component pieces that has the cutout has a protruding piece that protrudes from the side edge that is inclined in the direction from the base end to the tip, and further has a small piece that protrudes from the side edge that is inclined in the direction from the base end to the tip side more than the protruding piece, the small piece being smaller than the protruding piece, and the notch is between the protruding piece and the small piece, and in the assembled state, the protruding piece can be stacked on the underside of the bottom component piece adjacent to the bottom component piece that has the protruding piece. Furthermore, this invention has provided a folding box for packaging in which the side wall has a window through which the contents within the storage section can be seen, the side wall has a portion covering the area below the window, and in the assembled state, the center of the bottom supports the contents above the periphery of the bottom, the window is covered with a transparent or translucent plastic sheet, and the plastic sheet is glued to an adhesive tab provided around the window on the inner surface of the side wall, i.e., the surface of the side wall facing the contents, and the portion of the side wall covering the area below the window provides part of the adhesive tab, and in the assembled state, the center of the bottom is located at approximately the same height as the lower edge of the window. Furthermore, in the present invention, in an assembled state, the two adjacent side walls that form one corner of the rectangle have a first surface portion that is continuous with the cylindrical section of the approximately square cross section above the cylindrical section of the approximately square cross section and that gradually widens the corner upward, forming a single cornerless surface, and the other two adjacent side walls also have second surface portions that are continuous with the cylindrical section of the approximately square cross section above the cylindrical section of the approximately square cross section and that gradually widen the corners they form above the cylindrical section of the approximately square cross section, forming a single cornerless surface, and the upper end of the second surface portion is overlapped with the upper end of the first surface portion. The storage item can be put in and taken out by pushing apart the space between the upper end of the first surface portion and the upper end of the second surface portion, and in the unfolded state, each of the four side walls has a constant width in the direction in which the side walls are connected from the bottom side to the upper ends of the first and second surface portions, and the upper ends of the first surface portion and the second surface portion present line segments that extend straight mainly along the direction in which the side walls are connected, and a flap is extended from the upper end of the first surface portion on which the second surface portion is overlapped, and a tip of the flap has an insertion hole. a tongue piece is provided extending from the second surface portion, and a notch into which the tongue piece can be inserted is provided, and by inserting the tongue piece into the notch, it is possible to prevent the gap between the upper end of the first surface portion and the upper end of the second surface portion from opening up; both bottom constituent pieces provided extending from each of the two side walls continuing from the first surface portion are first surface side bottom constituent pieces, and both bottom constituent pieces provided extending from each of the two side walls continuing from the second surface portion are second surface side bottom constituent pieces, and in an assembled state, a base end of the first surface side bottom constituent piece having the protruding piece is in contact with the other The position where the base end of the first-side bottom component piece is connected to the base end of the second-side bottom component piece having the protruding piece is defined as a first position, and in an assembled state, the position where the base end of the second-side bottom component piece having the protruding piece is connected to the base end of the other second-side bottom component piece is defined as a second position, and each position where the base end of the second-side bottom component piece is connected to each of the base ends of the first-side bottom component pieces is defined as a third position, and in an unfolded state, the first position and the second position each have the shortest distance from the straight line (imaginary line) to which the line segment represented by the upper end of the first surface portion belongs,The base ends of the bottom constituent pieces, which form the boundary lines with the side walls, extend at an angle greater than the shortest distances between both third positions and the straight lines, relative to the direction in which the side walls are connected. This causes distortion when the assembled folding box is placed upright, resulting from gradual deformation of the four side walls into the two surfaces, the first surface and the second surface, as they extend upward from the tube with a substantially rectangular cross section on the bottom side. This prevents either the first or second position from floating up above the third position, making it possible to provide a folding box for packaging that is prevented from floating up. [Effects of the Invention]

[0013] This device makes it possible to reduce the impact that the contents of a folding box receive from the bottom when the box is placed upright. That is, the contents can be supported in a state where they are elevated above the periphery of the bottom at the center of the bottom of the folding box, and the contents are kept away from the surface of the folding box on which they are placed, thereby reducing the impact caused by the reaction force that acts on the contents. Furthermore, the present invention as defined in claim 2 provides a specific means for forming a bottom portion from a single sheet, in which at least the center of the bottom portion is positioned higher than the peripheral edge in a plan view. Furthermore, the present invention described in claim 3 constructs the folding box using a single sheet, and does not require any additional means such as spacers or cushioning materials to keep the contents away from the surface on which the folding box is placed. Furthermore, in the present invention as set forth in claim 4, the contents can be seen from outside the folding box through the window, and even if the side wall of the folding box has a portion below the window that covers the contents to ensure an adhesive margin for gluing the transparent or translucent plastic sheet attached to the window, the contents can be lifted from the center of the bottom and the bottom edge of the contents can be seen through the window. Cosmetic containers are often designed in an elaborate way to attract attention, and in the sale of cosmetics, it is desirable to avoid hiding this design as much as possible with packaging. However, with this invention, the contents can be lifted from inside the folding box and seen all the way to the bottom edge through the window. The present invention, as set forth in claim 5, enables a folding box suitable for storing items that gradually decrease in thickness from bottom to top, i.e., items that become flatter toward the top, to absorb impacts that the items receive from the bottom side of the folding box. Specifically, it reduces the risk of the lid breaking due to impacts from below, even when storing a lidded tube filled with cosmetics with the lid facing downward. In particular, it enables the folding box to be shaped to fit the shape of the stored item, such as the tube, while suppressing wobbling caused by distortion caused by the shaping, allowing the folding box to be placed stably. [Brief explanation of the drawings]

[0014] [Figure 1] (A) is a front view of a folding packaging box in an assembled state according to the first embodiment of the present invention, (B) is a left side view of the folding packaging box of (A), (C) is a right side view of the folding packaging box of (A), and (D) is a back view of the folding packaging box of (A). [Figure 2] (A) is a plan view of the folding packaging box shown in Figure 1(A), (B) is a bottom view of the folding packaging box shown in Figure 1(A), (C) is a front view of an item suitable for packaging in the folding box of Figure 1, and (D) is a front view showing the folding packaging box of Figure 1(A) in use. [Figure 3] (A) is an exploded view of the folding packaging box shown in Figure 1, (B) is a cross-sectional view of Figure 1(A) along the line xx, and (C) is an explanatory diagram showing the inside of the folding packaging box near the bottom of Figure 2(D) (a partially cutaway front view with the first surface removed). [Figure 4] (A) is a perspective view showing mainly the front side of a folding packaging box in an assembled state according to a second embodiment of the present invention; (B) is a perspective view showing mainly the back side of the folding packaging box of (A); (C) is a bottom view of the folding packaging box of (A); and (D) is an exploded view of the folding packaging box of (A). [Figure 5](A) is a perspective view showing mainly the front side of a folding packaging box in an assembled state according to the third embodiment of the present invention; (B) is a perspective view showing mainly the back side of the folding packaging box of (A); (C) is a bottom view of the folding packaging box of (A); and (D) is an exploded view of the folding packaging box of (A). [Figure 6] (A) is a perspective view showing mainly the front side of a folding packaging box in an assembled state according to the fourth embodiment of the present invention; (B) is a perspective view showing mainly the back side of the folding packaging box of (A); (C) is a bottom view of the folding packaging box of (A); and (D) is an exploded view of the folding packaging box of (A). [Figure 7] (A) is a perspective view showing mainly the front side of a conventional folding packaging box, (B) is a perspective view showing mainly the front side of the contents to be stored in the folding packaging box of (A), and (C) is a perspective view showing the state in which the contents of (B) have been stored in the folding packaging box of (A). [Figure 8] (A) is an exploded view of the folding packaging box of Figure 7(A), (B) is a bottom view of the folding packaging box of (A), and (C) is an explanatory diagram showing the inside of the folding packaging box near the bottom of Figure 7(C) (a partially cut-away front view with the front side wall removed). DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each figure, for ease of explanation, U indicates the top, S indicates the bottom, F indicates the front, B indicates the back, L indicates the left, and R indicates the right for this folding packaging box 1 (hereinafter simply referred to as folding box 1). Figure 3(A), which shows the unfolded state of folding box 1, shows the back side of paper piece 10 that makes up folding box 1 (the inner side of folding box 1), and U and S in Figure 3(A) correspond to the top and bottom of folding box 1 (Figure 1) when assembled. The dashed dotted line (FIG. 3(A)) indicates the crease (valley crease) along which the back surface of the piece of paper 10 is valley-folded.

[0016] (First embodiment) 1 to 3 show a folding packaging box 1 (hereinafter simply referred to as folding box 1) suitable for storing a tube (item g) filled with cosmetics or medicines as shown in FIG. 2(C), particularly suitable for storing the tube with the lid g1 side facing downward and the body g2 side facing upward. In this example, the folding box 1 is made up of a single piece of paper 10 that is made up of first to fourth side walls 11 to 14, first to fourth bottom constituent pieces 15 to 18, an adhesive piece 19, a flap 22, and a tongue piece 25.

[0017] 1) Deployment state In the piece of paper 10, the first to fourth side walls 11 to 14 are continuous areas, and in the unfolded state, the four side walls are connected in the horizontal direction (FIG. 3(A)). More specifically, the second side wall 12 extends to one end (right end) of the first side wall 11 via a first vertical fold line v1, the third side wall 13 extends to one end (right end) of the second side wall 12 opposite the first side wall 11 via a second vertical fold line v2, the fourth side wall 14 extends to one end (right end) of the third side wall 12 opposite the second side wall 12 via a third vertical fold line v3, and the adhesive tab 19 extends to one end (right end) of the fourth side wall 14 opposite the third side wall 13 via a fourth vertical fold line v4. That is, in the unfolded state, the first side wall 11, the second side wall 12, the third side wall 13, the fourth side wall 14, and the adhesive tab 19 are arranged in this order from left to right on the back surface of the piece of paper 10. The first to fourth vertical fold lines v1 to v4 extend parallel to one another. On the back side of the unfolded piece of paper 10, the first to fourth vertical fold lines v1 to v4 are valley fold lines whose extending direction is the vertical direction. In a plan view of the piece of paper 10, the first to fourth side walls 11 to 14 each have a substantially rectangular shape with the first to fourth vertical fold lines v1 to v4 as the long sides.

[0018] The second vertical fold line v2, which forms the boundary line between the second side wall 12 and the third side wall 13, extends along the vertical direction from the second and third bottom component pieces 16, 17 side, i.e., the lower end side, to the opposite side of the second and third bottom component pieces 16, 17, but disappears halfway to the upper ends of the second side wall 12 and the third side wall 13 in the vertical direction, and the boundary between the second side wall 12 and the third side wall 13 disappears from that halfway toward the upper end. In this example, a window 26 is formed through the piece of paper 10 from the back to the front, from the second side wall 12 to the third side wall 13, and the window 26 extends in the vertical direction. The second vertical fold line v2 extends in the vertical direction from between the second and third constituent pieces 16, 17 to the lower end of the window 24, where it is blocked by the window 26 and disappears.

[0019] The window 26 is covered with a transparent or semi-transparent plastic sheet 26a. On the back side of the paper piece 10, which forms the inner surface of the folding box 1, there is an adhesive area (the dark area shown in Figure 3(A)) surrounding the window 26, which serves as an adhesive margin for adhering the plastic sheet 26a. As described above, the second side wall 12 and the third side wall 13 have the second vertical fold line v2 in the region covering below the window 26 (between the regions 12a and 13a), but do not have the second vertical fold line v2 in the region covering above the window 26. The regions 12a and 13a provide part of the adhesive region. When the folding box 1 is assembled, the surfaces of the second side wall 12 and the third side wall 13 form the front side of the folding box 1, and the surfaces of the first side wall 11 and the fourth side wall 14 form the back side of the folding box 1. With respect to the second side wall 12 and the third side wall 13, the area covering the area above the center of the window 26 in the vertical direction (lengthwise) is referred to as the first surface portion as necessary, and the area of ​​the first side wall 11 and the fourth side wall 14 on the back side of the folding box 1 that corresponds to the first surface portion is referred to as the second surface portion as necessary.

[0020] The first to fourth bottom constituent pieces 15 to 18 are bottom constituent pieces that form the bottom of the folding box 1 when the folding box 1 is assembled. The first bottom component piece 15 extends to one vertical end (lower end) of the first side wall 11 via the first horizontal fold line v5, the second bottom component piece 16 extends to one vertical end (lower end) of the second side wall 12 via the second horizontal fold line v6, the third bottom component piece 17 extends to one vertical end (lower end) of the third side wall 13 via the third horizontal fold line v7, and the fourth bottom component piece 18 extends to one vertical end (lower end) of the fourth side wall 14 via the fourth horizontal fold line v8. In other words, the first to fourth horizontal fold lines v5 to v8 form one of the short sides of the rectangles formed by the first to fourth side walls 11 to 14, respectively. In this example, the second bottom component piece 16 and the third bottom component piece 17 correspond to the first surface side bottom component pieces in the claims, and the first bottom component piece 15 and the fourth bottom component piece 18 correspond to the second surface side bottom component pieces in the claims.

[0021] The flap 22 extends to the other end (upper end) of the second to third side walls 12 to 13 in the vertical direction via both the fifth horizontal fold line v9 and the sixth horizontal fold line v10, which are the other short sides of the rectangular shape of each of the second to third side walls 12 to 13. As will be described later, the fifth horizontal fold line v9 and the sixth horizontal fold line v10 both belong to the same straight line (a virtual line, not shown) that extends along the horizontal direction (the continuous direction of the first to fourth side walls 11 to 14). The upper end edges 11b, 14b, which are the other of the short sides of the rectangles formed by the first and fourth side walls 11, 14, respectively, also belong to the same straight line (a virtual line, not shown) extending along the horizontal direction (the continuous direction of the first to fourth side walls 11 to 14), as will be described later. When the folding box 1 is assembled, the fifth horizontal fold line v9 and the sixth horizontal fold line v10 become the upper end of the first surface portion, and the upper end edges 11b, 14b of the first and fourth side walls 11, 14 become the upper end of the second surface portion.

[0022] Between the fifth horizontal fold line v9 and the sixth horizontal fold line v10, a hanging piece 23 is formed by punching out an arc shape toward the flap 22. A through-hole 24 for hanging is drilled in the hanging piece 23. Furthermore, on the back side of the unfolded piece of paper 10, upwardly protruding auxiliary pieces 11c and 14c are provided at the left end of the upper edge 11b of the first side wall 11 and the right end of the upper edge 14b of the fourth side wall 14, respectively. In the area that will become the second surface portion of the first side wall 11 and the fourth side wall 14, a slit 11d is provided at the left end (vertical edge 11a) of the first side wall 11, and a slit 14d is also provided at the right end of the fourth side wall 14. The upper end of the fourth vertical fold line v4 coincides with the position of the slit 14d. In other words, the upper end of the adhesive tab 19 is defined by the slit 14d. An extension piece 14a extending to the right is provided above the slit 14d at the right end of the fourth side wall 14. No fourth vertical fold line v4 is interposed between the fourth side wall 14 and the extension piece 14a. The extension piece 14a provides an adhesive margin together with the adhesive margin piece 19.

[0023] The first bottom component piece 15 has a generally trapezoidal outline tapering from the first horizontal fold line v5 toward the tip of the first bottom component piece 15. The second component piece 16 has a generally trapezoidal outline tapering from the second horizontal fold line v6 toward the tip of the second bottom component piece 16. The third bottom component piece 17 has a generally trapezoidal outline tapering from the third horizontal fold line v7 toward the tip of the third bottom component piece 17. The fourth bottom component piece 18 has a generally trapezoidal outline tapering from the fourth horizontal fold line v8 toward the tip of the fourth bottom component piece 18.

[0024] Each of the first to fourth bottom constituent pieces 15 to 18 has the lower base of the trapezoid it presents as the base end and the upper base of the trapezoid as the tip. The first bottom component piece 15 has an isosceles trapezoidal shape in which the leg of the trapezoid, which is the side 15b facing the second bottom component piece 16, is slightly longer than the leg, which is the side 15a facing the opposite side from the second bottom component piece 16. The third bottom component piece 17 has an isosceles trapezoidal shape in which the leg of the trapezoid, which is the side 17a facing the second bottom component piece 16, is longer than the leg of the trapezoid, which is the side 17b facing the fourth bottom component piece 18.

[0025] The second bottom component piece 16 is an isosceles trapezoid in which the leg of the trapezoid, which is the side 16a facing the first bottom component piece 15, is longer than the leg, which is the side 17b facing the third bottom component piece 17. The side 16b of the second bottom component piece 16 is approximately perpendicular to the base end of the second bottom component piece 16 (second horizontal fold line v6), and the side 16a of the second bottom component piece 16 is an oblique side inclined with respect to the base end of the second bottom component piece 16. A protruding piece extends from the side 16a of the second component piece 16, which is the oblique side, in a direction intersecting with the side 16a, via an oblique fold line v11, as a first protruding piece 20. The oblique fold line v11 is part of the side 16a. On the back side of the piece of paper 10, the piece of paper 10 is mountain-folded along a diagonal crease line v11.

[0026] The outline of first protruding piece 20 is a pentagon with a triangle extended from one side of a rectangle, similar to a baseball home base. One side of the rectangle of first protruding piece 20 serves as a base (imaginary line), and the triangle has two other oblique sides 20a and 20b. If the pentagon of first protruding piece 20 is likened to home base, the oblique crease line v11 is the side facing the pitcher. The side edge 16a of the second bottom component piece 16 has a triangular small piece 16c that protrudes in a direction intersecting with the side edge 16a, located closer to the tip of the second component piece 16 than the section that forms the base end of the first protruding piece 20. A notch (first notch 16d) is formed between the first protruding piece 20 and the first small piece 16c.

[0027] The fourth bottom component piece 18 is an isosceles trapezoid in which the leg of the trapezoid, which is the side 18a facing the third bottom component piece 17, is longer than the leg, which is the side 18b facing the opposite side of the third bottom component piece 17. The side 18b of the fourth bottom component piece 18 is approximately perpendicular to the base end of the fourth bottom component piece 18 (fourth horizontal fold line v8), and the side 18a of the fourth bottom component piece 18 is an oblique side that is inclined relative to the base end of the fourth bottom component piece 18. A protruding piece protruding from the side 18a of the fourth component piece 18, which is the oblique side, in a direction intersecting with the side 18a, is extended as a second protruding piece 21 via an oblique fold line v12. The oblique fold line v12 is part of the side 18a. On the back side of the piece of paper 10, the piece of paper 10 is mountain-folded along a diagonal crease line v12.

[0028] The outline of second protruding piece 21 is a pentagon with a triangle extended from one side of a rectangle, similar to a baseball home base. One side of the rectangle of second protruding piece 21 serves as a base (imaginary line), and the triangle has two other oblique sides 21a and 21b. If the pentagon of second protruding piece 21 is likened to home base, the oblique crease line v12 is the side facing the pitcher. The side edge 18a of the fourth bottom component piece 18 has a triangular small piece 18c that protrudes in a direction intersecting with the side edge 18a toward the tip side of the fourth component piece 18 beyond the section that forms the base end of the second protruding piece 21. A notch (second notch 18d) is formed between the second protruding piece 21 and the second small piece 18c.

[0029] 2) Assembly With respect to the unfolded piece of paper 10 shown in Figure 3(A), valley folds are made between each of the first to fourth side walls 11 to 14 along the first to fourth vertical fold lines v1 to v4, so that the first to fourth side walls 11 to 14 are shaped like a tube with an approximately rectangular cross section (in this example, a diamond shape). As the first to fourth side walls 11 to 14 are formed into the cylindrical shape, the first to fourth bottom constituent pieces 15 to 18 are folded along the first to fourth horizontal fold lines v5 to v8 relative to the first to fourth side walls 11 to 14, respectively.

[0030] The distance (shortest distance) from the base end (second horizontal fold line v6) of the second bottom component piece 16 to the deepest part of the first cutout portion 16d is greater than half the distance between the base ends of the second bottom component piece 16 and the fourth bottom component piece 18, i.e., between the second horizontal fold line v6 and the fourth horizontal fold line v8, when the first to fourth side walls 11 to 14 are shaped into a rectangular cylindrical shape in cross section. The distance (shortest distance) from the base end (fourth horizontal fold line v8) of the fourth bottom component piece 18 to the deepest part of the second cutout portion 18d is greater than half the distance between the base ends of the second bottom component piece 16 and the fourth bottom component piece 18 when the first to fourth side walls 11 to 14 are shaped into a rectangular cylindrical shape in cross section, i.e., between the second horizontal fold line v6 and the fourth horizontal fold line v8.

[0031] The first to fourth bottom constituent pieces 15-18 are each valley-folded along the first to fourth horizontal fold lines v5-v8 relative to the first to fourth side walls 11-14, and the third bottom constituent piece 17 is placed on top of the fourth bottom constituent piece 18, the second bottom constituent piece 16 is placed on top of the third bottom constituent piece 17, and the first bottom constituent piece 15 is placed on top of the second bottom constituent piece 16 (FIGS. 2(B) and 3(B)(C)). The first to fourth bottom constituent pieces 15-18 are valley-folded as described above in the order of the first bottom constituent piece 15, the second bottom constituent piece 16, the third bottom constituent piece 17, and the fourth bottom constituent piece 18, to form the above-mentioned arrangements. During the above arrangement, the first notch 16d and the second notch 18d are hooked together to form the bottom of the folding box 1.

[0032] As described above, the distance (shortest distance) from the base end (second horizontal fold line v6) of the second bottom constituent piece 16 to the deepest part of the first cutout portion 16d is greater than half the distance between the base ends of the second bottom constituent piece 16 and the fourth bottom constituent piece 18 when the first to fourth side walls 11 to 14 are shaped into a rectangular cylindrical shape in cross section, i.e., half the distance between the second horizontal fold line v6 and the fourth horizontal fold line v8, and the distance (shortest distance) from the base end (fourth horizontal fold line v8) of the fourth bottom constituent piece 18 to the deepest part of the second cutout portion 18d to the deepest part of the Since the distance (short distance) is greater than half the distance between the base ends of the second bottom constituent piece 16 and the fourth bottom constituent piece 18, i.e., between the second horizontal fold line v6 and the fourth horizontal fold line v8, the first notch 16d and the second notch 18d engage with each other above the first to fourth horizontal fold lines v5 to v8 that define the outline of the bottom of the folding box 1, and the leading ends of the first to fourth bottom constituent pieces 15 to 18 are positioned above the first to fourth horizontal fold lines v5 to v8 that define the outline of the bottom of the folding box 1. The leading ends of the combined bottom constituent pieces 14 to 18 are positioned above the periphery of the bottom as the center of the bottom.

[0033] The tip of each of the bottom constituent pieces 14 to 18 does not extend above the lower edge of the window 26, and preferably the tip of each of the bottom constituent pieces 14 to 18 is positioned at approximately the same height as the lower edge of the window 26. In the above arrangement, the first protruding piece 20 is folded in a mountain fold at the diagonal fold line v11 relative to the second bottom component piece 16 and is superimposed below the first bottom component piece 15, and the second protruding piece 21 is folded in a mountain fold at the diagonal fold line v12 relative to the fourth bottom component piece 18 and is superimposed below the first bottom component piece 15 (Figures 3(A) and 2(B)).

[0034] The first to fourth side walls 11 to 14 are formed into a cylindrical shape, and the bottom is formed using the first to fourth bottom component pieces 15 to 18. Glue is applied to the surface side of the adhesive strip 19 to adhere the surface side of the adhesive strip 19 to the vertical end edge 11a on the back side of the first side edge 11. After the above-mentioned bonding, the second side wall 12 and the third side wall 13 are continuous with the cylindrical portion having a substantially rectangular cross section, and the corners between the second side wall 12 and the third side wall 13 gradually widen upward to present a single cornerless surface, which is the aforementioned first surface. Furthermore, after the above-mentioned bonding, the first side wall 11 and the fourth side wall 14 are continuous with the cylindrical portion having a substantially rectangular cross section, and the corners between the first side wall 11 and the fourth side wall 14 gradually widen upward to present a single cornerless surface, which is the aforementioned second surface. The space surrounded by the first to fourth side walls 11 to 14 and the first to fourth bottom constituent pieces 15 to 18 of the assembled paper piece 10 is the storage section for storing the storage item g.

[0035] The upper end of the second surface portion can be overlapped with the upper end of the first surface portion, and the space between the upper ends of the first surface portion and the second surface portion can be widened to allow storage items g to be put in and taken out of the storage portion. In the unfolded state, each of the first to fourth side walls 11 to 14 has a constant width in the continuous direction (left-right direction in Figure 3(A)) in which the first to fourth side walls 11 to 14 are connected to each other, from the bottom side to the upper ends of the first and second surface portions. In the unfolded state, the upper end of the first surface portion is a line segment that extends mainly in a straight line along the direction in which the side walls are joined, and the upper end of the second surface portion is also a line segment that extends mainly in a straight line along the direction in which the side walls are joined. That is, the fifth horizontal fold line v9 and the sixth horizontal fold line v10 form part (segment) of the aforementioned straight line (imaginary line) extending in the left-right direction of Figure 3(A), and the upper edges 11b and 14b also form part (segment) of the aforementioned straight line (imaginary line) extending in the left-right direction of Figure 3(A).

[0036] The flap 22 extends from the upper end of the first surface portion via a fifth horizontal fold line v9 and a sixth horizontal fold line v10. The flap 22 has the tongue piece 25 for insertion extending from the tip thereof. As described above, by forming the first to fourth side walls 11 to 14 into a cylindrical shape and gluing them with the adhesive strip 19, the slit 11d at the left end (vertical edge 11a) of the first side wall 11 and the slit 14d at the right end of the fourth side wall 14 face each other to form a single slit. By folding the flap 22 valley-like relative to the first surface portion along the fifth horizontal fold line v9 and the sixth horizontal fold line v10 and inserting the tongue piece 25 into the slit, the flap 22 is fixed and it is possible to prevent the upper end of the first surface portion and the upper end of the second surface portion from opening up.

[0037] In the assembled state, the position where the base end (second horizontal fold line v6) of the second bottom component piece 16 having the first protruding piece 20 connects to the base end of the third bottom component piece 17 is defined as the first position t1, the position where the base end of the fourth bottom component piece 18 having the second protruding piece 21 connects to the base end of the first bottom component piece 15 is defined as the second position t2, and the position where the base end (first fold line v5) of the first bottom component piece 15 connects to the base end (second horizontal fold line v6) of the second bottom component piece 16 and the position where the base end (third fold line v7) of the third bottom component piece 17 connects to the base end (fourth horizontal fold line v8) of the fourth bottom component piece 18 are both defined as the third position t3.

[0038] In the unfolded state, the shortest distance between the first position t1 and the second position t2 and the straight line (a virtual line, not shown) to which the upper end of the first surface portion (the fifth horizontal fold line v9 and the sixth horizontal fold line v10) belongs is greater than the shortest distance between the third position t3 and the straight line, respectively. As a result, the base ends (the first to fourth horizontal fold lines v5 to v8) of the first to fourth bottom component pieces 15 to 18 extend obliquely in the direction in which the first to fourth side walls 11 to 14 are connected (the left-right direction in Figure 3(A)). 3(A), the base ends (first to fourth horizontal fold lines v5 to v8) of the first to fourth bottom constituent pieces 15 to 18 are inclined relative to a straight line (imaginary line) indicated by dashed line h that is parallel to the above-mentioned straight line and passes through the third position t3, and the first and second positions t1 and t2 are each located on the lower side S of the dashed line h. More specifically, the first horizontal fold line v5 and the third horizontal fold line v7 are inclined downward to the left relative to the dashed line h that extends left and right, and the second horizontal fold line v6 and the fourth horizontal fold line v8 are inclined downward to the right relative to the dashed line h.

[0039] By adopting the above-mentioned arrangement of the first and second positions t1, t2 with respect to the third position t3, when the assembled folding box 1 is placed upright, the first to fourth side walls 11 to 14 gradually deform into the two surfaces, the first surface and the second surface, as they move upward from the tube with an approximately rectangular cross section on the bottom side, causing distortion that prevents either the first or second position t1, t2 from floating up higher than the third position t3.

[0040] As an example, in the unfolded state shown in Figure 3 (A), the width (shortest distance) between the vertical edge 11a and the right end of the adhesive tab 19 is 194 mm, the horizontal width of the first side wall 11 (shortest distance between the vertical edge 11a and the first vertical fold line v1) is 44 mm, the horizontal width of the second side wall 12 (shortest distance between the first vertical fold line v1 and the second vertical fold line v2) is 45 mm, the horizontal width of the third side wall (shortest distance between the second vertical fold line v2 and the third vertical fold line v3) is 45 mm, the horizontal width of the adhesive tab 19 (shortest distance between the fourth vertical fold line v4 and the right end of the adhesive tab 19) is 15 mm, the vertical width (vertical width) of the flap 22 excluding the tongue 25 is 36 mm, the vertical width (vertical width) of the tongue 25 is 12 mm, and the length of the first vertical fold line v1 is 140.642 mm.

[0041] In the unfolded state shown in Figure 3(A), in this example, the tongue piece 25 is the top of the paper piece 10, and the left end of the tip (side) of the second bottom component piece 16 and the left end of the tip (side) of the fourth bottom component piece 18 are the bottom of the paper piece 10. 3(A) is 224.305 mm. That is, the shortest distance between the tip of the tongue piece 25 and a straight line (a virtual line not shown) passing through the left end of the tip (side) of the second bottom component piece 16 and the left end of the tip (side) of the fourth bottom component piece 18 is 224.305 mm. In addition, in this example, the straight line to which the fifth horizontal fold line v9 and the sixth horizontal fold line v10 belong does not coincide with the straight line to which the upper edges 11b and 14b belong, and in Figure 3(A), the straight line to which the fifth horizontal fold line v9 and the sixth horizontal fold line v10 belong is located 1 mm above the straight line to which the upper edges 11b and 14b belong.

[0042] As described above, the first position t1 and the second position t2 are located lower than the third position t3 in Fig. 3(A), and the shortest distance between the first horizontal fold line v5 and the sixth horizontal fold line v6 and the straight line is greater than the shortest distance between the third position t3 and the straight line (the width between the first position t1 and the second position t2 and the straight line is greater than the width between the third position t3 and the straight line). The angle between the side edge 16a of the second bottom component piece 16 and the second horizontal fold line v6 is 45 degrees, and the angle between the side edge 18a of the fourth bottom component piece 18 and the fourth horizontal fold line v8 is also 45 degrees.

[0043] At the intersection of the first horizontal fold line v5 with the dashed line h (one of the third positions t3) shown in Figure 3(A), the included angle between the dashed line h and the first horizontal fold line v5 is 3 degrees (the left edge of the first horizontal fold line v5 is 3 degrees downward relative to the right edge). Also, at the intersection of the second horizontal fold line v6 with the dashed line h (one of the third positions t3) shown in Figure 3(A), the included angle between the dashed line h and the second horizontal fold line v6 is 3 degrees (the right edge of the second horizontal fold line v5 is 3 degrees downward relative to the left edge).

[0044] Furthermore, at the intersection of the third horizontal fold line v7 with the dashed line h shown in Figure 3(A) (the other third position t3), the included angle between the dashed line h and the third horizontal fold line v7 is 3 degrees (the left end side of the third horizontal fold line v5 is 3 degrees downward relative to the right end side). Also, at the intersection of the fourth horizontal fold line v8 with the dashed line h shown in Figure 3(A) (the other third position t3), the included angle between the dashed line h and the fourth horizontal fold line v8 is 3 degrees (the right end side of the fourth horizontal fold line v8 is 3 degrees downward relative to the left end side). The outer contour of the adhesive area (the dark area shown in FIG. 3(A)) of the plastic sheet 26a corresponds to the outer contour of the plastic sheet 26a. In this example, the minimum width between the adhesive area and the edge of the window 26 is 15 mm in both the vertical and horizontal directions. The above-mentioned dimensions and angles are merely examples, and may be modified as appropriate depending on the dimensions and shape of the stored item g and the design of the folding box 10.

[0045] (Second embodiment) Figure 4 shows a folding box 1 suitable for storing tube-type containers filled with cosmetics or medicines, as shown in Figure 2(C), or bottle-type containers with a roughly circular or elliptical cross section as shown in Figure 7(B), or even a roughly rectangular cross section (not shown). In this example, the folding box 1 is also made of the single piece of paper 10 that includes the first to fourth side walls 11 to 14, the first to fourth bottom constituent pieces 15 to 18, and the adhesive piece 19. The following description will focus on the differences from the first embodiment, and items that are not specifically mentioned are the same as those in the first embodiment.

[0046] In this embodiment, in the assembled state, the storage section of the folding box 1 is a cylindrical body with a substantially rectangular (diamond) cross section over the entire vertical direction. That is, the second valley fold v2 forms an angle all the way to the top end of the folding box 1, and the first side wall 11 and the fourth side wall 14, which are glued to the adhesive tab 19, also form an angle all the way to the top end of the folding box 1. 4(A) to 4(C) does not have a first surface or a second surface as in the first embodiment, so there is no distortion in the folding box 1, and there is no need to consider whether either the first or second position t1 or t2 rises above the third position t3. Therefore, on the bottom side of the folding box 1, the first to fourth horizontal fold lines v1 to v4 of the first to fourth bottom constituent pieces 15 to 18 all belong to the same straight line (imaginary line) extending in the horizontal direction (left and right direction in FIG. 4(D)), and the first and second positions t1 and t2 and the third position t3 all lie on this straight line.

[0047] 4(A) to 4(C), this embodiment does not include the flap 22 shown in the first embodiment, and neither the first side wall 11 nor the fourth side wall 14 includes a slit 11d. A top piece 11e having an approximately triangular shape in plan view extends from the upper end of the first side wall 11 via a diagonal fold line v13, and a top piece 14e having an approximately triangular shape in plan view extends from the upper end of the fourth side wall 14 via a diagonal fold line v14 (Figure 4(D)). The diagonal fold line v13 at the upper end of the first side wall 11 slopes downward as it moves from the second side wall 12 side toward the opposite side of the second side wall 12 (left side in Figure 4(D)), and the diagonal fold line v14 at the upper end of the fourth side wall 14 slopes downward as it moves from the third side wall 13 side toward the opposite side of the third side wall 13 (right side in Figure 4(D)).

[0048] Top piece 11e is a roughly equilateral triangle in plan view, with one side defined by diagonal fold line v13, the other side of top piece 11e extending straight upward from vertical edge 11a of first side wall 11, and a backing piece 11f extending from the left half of the remaining side of top piece 11e via diagonal fold line v15, which has a roughly parallelogram shape in plan view. Top piece 14e is also a roughly equilateral triangle in plan view, with one side defined by diagonal fold line v14, the other side of top piece 14e extending straight upward from fourth vertical fold line v4, and a backing piece 14f extending from the right half of the remaining side of top piece 14e via diagonal fold line v16, which has a roughly parallelogram shape in plan view.

[0049] The upper end of each of the first side wall 11 and the second side wall 12 includes an extension region 23a extending above the diagonal fold lines v13, v14 of the top pieces 11e, 14e. A second vertical fold line v2 is disposed between the extension regions 23a. A folded piece 24a extends from the upper end of each of the extended regions 23a via horizontal fold lines v17, v18. A secondary second fold line v2a is disposed between the folded pieces 24a and extends vertically, continuing from the extended region 23a.

[0050] When assembling, as in the first embodiment, valley folds are made between the first to fourth side walls 11 to 14 at the first to fourth vertical fold lines v1 to v4, forming the first to fourth side walls 11 to 14 into a cylindrical shape with an approximately rectangular cross section (in this example, diamond-shaped), and the first to fourth bottom constituent pieces 15 to 18 are valley-folded relative to the first to fourth side walls 11 to 14 at the first to fourth horizontal fold lines v5 to v8, respectively, so that the first cutout portion 16d and the second cutout portion 18d are hooked together, and the tip sides of the first to fourth bottom constituent pieces 15 to 18 are positioned above the first to fourth horizontal fold lines v5 to v8 that form the outline of the bottom of the folding box 1 (Figures 4(A) to (C)).

[0051] As described above, the first to fourth side walls 11 to 14 are formed into a cylindrical shape, and the top pieces 11e, 14e are respectively valley-folded relative to the first and fourth side walls 11, 14 along the diagonal crease lines v13, v14, and the backing pieces 11f, 14f are mountain-folded relative to the top pieces 11e, 14e along the diagonal crease lines v15, v16, so that the backing pieces 11f, 14f are superimposed on the back surfaces of the extended regions 23a of the second side wall 12 and the third side wall 13. The folded-back pieces 24a are valley-folded relative to the extended regions 23a along the horizontal crease lines v17, v18, so that the folded-back pieces 24a are superimposed on the backing pieces 11f, 14f superimposed on the back surfaces of the extended regions 23a (FIG. 4(B)). Both extension areas 23a are provided with through holes 24 for hanging that span both extension areas 23a, and both folded pieces 24a are also provided with through holes 24b that span both folded pieces 24a, and by overlapping both folded pieces 24a on backing pieces 11f, 14f, through holes 24b overlap through holes 24.

[0052] (Third embodiment) In the third embodiment shown in FIG. 5, the folding box 1 also consists of a single piece of paper 10 having first to fourth side walls 11 to 14, first to fourth bottom constituent pieces 15 to 18, and an adhesive piece 19. The following description will focus on the differences from the second embodiment, and items that are not specifically mentioned are the same as those in the second embodiment.

[0053] The folding box 1 shown in Fig. 5 has an overall configuration similar to the folding box shown in Fig. 8 and is a rectangular parallelepiped with a roughly square cross section. Unlike the second embodiment, the folding box 1 shown in Fig. 5 does not have the extended region 23a, top pieces 11f, 14f, or folding piece 24a, but instead has a lid piece 27 extending from the upper edge of the second side wall 12, flaps 28a, 28b, and 28c extending from the upper edges of the first, third, and fourth side walls 11, 13, and 14, and a tongue piece 27a provided at the tip side of the lid piece 27 (Fig. 5(D)). The width of the base end side of the tongue piece 27a is smaller than the width of the tip side of the tongue piece 27a, and the tongue piece 27a has a narrowed shape. The configuration of the bottom side of the folding box 1 shown in FIG. 5 is the same as that of the second embodiment shown in FIG.

[0054] When assembling the folding box 1 shown in Figure 5, valley folds are made between each of the first to fourth side walls 11 to 14 at the first to fourth vertical fold lines v1 to v4, making the first to fourth side walls 11 to 14 tubular with an approximately rectangular cross section (square in this example), and each of the first to fourth bottom constituent pieces 15 to 18 is valley folded relative to the first to fourth side walls 11 to 14 at the first to fourth horizontal fold lines v5 to v8, hooking the first cutout portion 16d and the second cutout portion 18d together, and positioning the tip sides of the first to fourth bottom constituent pieces 15 to 18 above the first to fourth horizontal fold lines v5 to v8 that form the outline of the bottom of the folding box 1 (Figures 5(A) to (C)). A horizontal fold line v19 is provided near the upper end of the fourth side wall 14. The horizontal fold line v19 is smaller than the width of the fourth side wall 14 and is located at the center of the fourth side wall 14 in the horizontal direction (the left-right direction in FIG. 5(D)). Cut lines v20 are provided upward from the left and right ends of the horizontal fold line v19, and the upper ends of both cut lines v20 reach the upper edge of the fourth side wall 14. At the upper edge of the fourth side wall 14, the section between the upper ends of the cut lines v20 forms a cut that is not connected to the flap piece 28c.

[0055] The first to fourth side walls 11 to 14 are assembled into a cylindrical shape, and the flap pieces 28a, 28b, 28c are folded in a valley relative to the first, third, and fourth side walls 11, 13, 14, and then the lid piece 27 is folded in a valley relative to the second side wall 12. The tongue piece 27a is then bent in a valley shape around the lid piece 27, and inserted into the notch. When opening the lid piece 27, for example to remove stored items, the tongue piece 27a can be smoothly pulled out of the notch by splitting both perforations v20.

[0056] (Fourth embodiment) Figure 6 is a modified example of the folding box 1 shown in Figure 5, and differs from the folding box 1 shown in Figure 5 in that the widths of the second side wall 12 and the fourth side wall 14 are greater than the widths of the first side wall 11 and the third side wall 13, and the window 26 that straddles the second side wall 12 and the third side wall 13 in the first to third embodiments is contained within the second side wall 12 and does not straddle the third side wall 13. With the above deformation, the cross sections of the cylindrical first to fourth side walls 11 to 14 become rectangular, but for the first to fourth bottom component pieces 15 to 18, the second horizontal fold line v6 and the fourth horizontal fold line v8 can be made longer than the first horizontal fold line v5 and the third horizontal fold line v7. The fourth embodiment is similar to the third embodiment unless otherwise specified. [Explanation of symbols]

[0057] 1 folding box 10 pieces of paper 11 First side wall 11a Vertical edge 11b Top edge 11c Auxiliary piece 11d Break 12 Second side wall 13 Third side wall 14 Fourth Side Wall 14a Extension piece 14b Top edge 14c Auxiliary piece 14d Break 15 1st bottom component piece 15a side 15b Side 16 Second bottom component piece 16a Side 16b Side 16c 1st piece 16d First notch 17 Third bottom component piece 17a Side 17b Side 18 4th bottom component piece 18a Side 18b Side 18c 2nd piece 18d Second notch 19 Glue allowance piece 20 1st protruding piece 21 Second protruding piece 22 Flap 23 Hanging piece 24 through holes 25 Tongue piece 26 Windows 26a Plastic sheet g Storage items t1 1st position t2 second position v1 First vertical fold line v2 Second vertical crease line v3 Third vertical fold line v4 Fourth vertical crease line v5 First horizontal fold line v6 Second horizontal fold line v7 Third horizontal fold line v8 4th horizontal crease line v9 5th horizontal fold line v10 6th horizontal fold line v11 Diagonal crease v12 Diagonal crease

Claims

1. A folding box for packaging in an assembled state, wherein the storage section of the folding box has a cylindrical portion surrounded by side walls from above the bottom of the folding box to the periphery of the bottom, and at least the center of the bottom is located above the periphery of the bottom in a plan view.

2. At least the cylindrical portion is formed from a single sheet of paper or plastic, and includes four side walls that form a tube with a substantially rectangular cross section, and four bottom constituent pieces that extend from the lower end edges of each side wall and form the bottom portion, In the sheet, the four side walls are connected to one another, and one of the side walls located at one end in the connecting direction, i.e., the continuous direction, is provided with a glue tab extending in the continuous direction, and the four connected side walls are folded between each other, and the side wall located at the other end in the connecting direction is glued to the glue tab, thereby forming the tube having a substantially rectangular cross section, When assembled, each bottom component piece is folded against the side wall, so that the bottom components are combined together with each other so that there is an overlapping portion between them; A notch is provided at the tip of each of the pair of opposing bottom constituent pieces, The bottom constituent pieces are combined and the cutout portions of the pair of opposing bottom constituent pieces are hooked together to fix the bottom constituent pieces in a folded state, thereby forming the bottom of the folding box, 2. A folding box for packaging according to claim 1, wherein the shortest distance from the base end of the bottom component piece on which the notch is provided is longer than half the length of the distance between the opposing base ends of the pair of bottom component pieces on which the notch is provided, and the two notches are hooked together above the base ends of each bottom component piece, so that the tip side of each combined bottom component piece, i.e., the center of the bottom, is positioned above the peripheral edge of the bottom.

3. The entire product is made from a single piece of paper or a single sheet of plastic. Each bottom component piece has an inclined side as a side edge, the side edge being inclined in a direction from the base end of the bottom component piece toward the tip end of the bottom component piece, with the boundary with each side wall as a base end, The inclination of the side edges causes each bottom component piece to gradually narrow in width from the base end to the tip end, each of the bottom constituent pieces having the notch has a protruding piece protruding from the side edge inclined in the direction from the base end to the tip end, and further has a small piece protruding from the side edge inclined in the direction from the base end to the tip end further to the tip side than the protruding piece, the small piece being a portion smaller than the protruding piece; The notch is formed between the protruding piece and the small piece, 3. The folding box for packaging according to claim 2, wherein, in an assembled state, said protruding piece is superimposed on the underside of the bottom component piece adjacent to said bottom component piece having said protruding piece.

4. The side wall has a window through which items stored in the storage section can be seen, the side wall has a portion covering a portion below the window, In an assembled state, the center of the bottom supports the stored item above the periphery of the bottom, The window is covered with a transparent or translucent plastic sheet; The plastic sheet is glued to a glue tab provided around the window on the inner surface of the side wall, i.e., the surface of the side wall facing the stored items, The portion of the side wall covering the lower portion of the window provides a part of the adhesive margin, 4. A folding box for packaging according to claim 3, wherein in an assembled state, the center of said bottom is positioned at approximately the same height as the lower edge of said window.

5. In the assembled state, two of the side walls that are adjacent to each other and form one corner of the rectangle have a first surface portion that is continuous with the cylindrical section of the approximately square cross section above the cylindrical section of the approximately square cross section and that gradually widens the corner upward, forming a single cornerless surface, and the other two of the side walls that are adjacent to each other also have second surface portions that are continuous with the cylindrical section of the approximately square cross section above the cylindrical section of the approximately square cross section and that gradually widen the corners they form above, forming a single cornerless surface, and the upper end of the second surface portion can be overlapped with the upper end of the first surface portion, and the space between the upper ends of the first surface portion and the second surface portion can be expanded to insert and remove the stored items, and in the unfolded state, each of the four side walls has a constant width in the direction in which the side walls are connected to each other from the bottom side to the upper ends of the first and second surface portions, and the first surface portion The upper ends of the first surface portion and the second surface portion are mainly straight lines extending in the direction in which the side walls are connected to each other, a flap is extended from the upper end of the first surface portion on which the second surface portion is placed, and a tongue piece for insertion is extended from the tip of the flap, and a notch into which the tongue piece can be inserted is provided in the second surface portion, and by inserting the tongue piece into the notch, the distance between the upper end of the first surface portion and the upper end of the second surface portion is the bottom component pieces extending from each of the two side walls continuous with the first surface portion are referred to as first surface side bottom component pieces, and the bottom component pieces extending from each of the two side walls continuous with the second surface portion are referred to as second surface side bottom component pieces, and in an assembled state, a position where a base end of one of the first surface side bottom component pieces having the protruding piece is connected to a base end of the other first surface side bottom component piece is referred to as a first position; In an assembled state, the position where the base end of the second-side bottom component piece having the protruding piece among the second-side bottom component pieces is connected to the base end of the other second-side bottom component piece is defined as a second position, and each position where the base end of the second-side bottom component piece is connected to each of the base ends of the first-side bottom component pieces is defined as a third position, and in an unfolded state, with respect to a straight line to which the line segment presenting the upper end of the first surface portion belongs, the first position and the second position each have the shortest distance from the straight line to which both third positions belong. and the base ends of the bottom constituent pieces that form the boundary lines with the side walls extend at an angle relative to the direction in which the side walls are connected, so that when the assembled folding box is placed upright, the four side walls gradually deform into the two surfaces, the first surface and the second surface, as they extend upward from the tube with a substantially rectangular cross section on the bottom side, causing distortion that would cause either the first or second surface to rise above the third surface, thereby preventing this rise.

Images