Temporary fastening structure and packaging box
The temporary fastening structure in packaging boxes addresses the issue of flap wrinkling by optimizing overlap and flexibility distribution between protrusions and hooking portions, enabling efficient and wrinkle-free fastening.
Patent Information
- Application Number
- JP2024039569
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-03-14
- Publication Date
- 2025-09-29
AI Technical Summary
Existing temporary fastening structures for packaging boxes require significant pressure, leading to wrinkles in the flaps due to uneven overlap and bending tendencies.
A temporary fastening structure with protrusions and hooking portions where the overlap is greater at the center of the box body, which is more flexible, and smaller at the outer edge, allowing for uniform bending and reduced pressure application.
The structure allows for smooth fastening of flaps with minimal pressure, preventing wrinkles by ensuring even overlap and flexibility distribution, thus enhancing the packaging process.
Smart Images
Figure 2025140275000001_ABST
Abstract
Description
[Technical Field]
[0001] The present invention relates to a temporary fastening structure and a packaging box. [Background technology]
[0002] Conventionally, packaging boxes provided with a temporary fastening structure for a pair of outer flaps have been known (see, for example, Patent Document 1). In the temporary fastening structure described in Patent Document 1, two insertion pieces and three hooking pieces are provided at the tip of one outer flap, and two hooking pieces and three insertion pieces are provided at the tip of the other outer flap. Each outer flap has a pair of valley fold lines extending diagonally from both corners on the base end toward the center, making each outer flap easy to fold along the pair of valley fold lines. When the pair of outer flaps are pressed, each insertion piece enters under the opposing hooking pieces, temporarily fastening the pair of outer flaps. [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Patent No. 4628487 Summary of the Invention [Problem to be solved by the invention]
[0004] However, in the temporary fastening structure described in Patent Document 1, the amount of pressure applied to the pair of outer flaps becomes large, which makes it easy for wrinkles to form in the pair of outer flaps.
[0005] Therefore, an object of the present invention is to provide a temporary fastening structure and a packaging box that can reduce the amount of pressure required during temporary fastening. [Means for solving the problem]
[0006] A temporary fastening structure according to one embodiment of the present invention is a temporary fastening structure for a first panel and a second panel that constitute one side of a box body, and comprises a protrusion provided on the first panel and a hooking portion provided on the second panel, wherein the first panel overlaps the second panel from the outside, a slit is formed in the hooking portion through which the protrusion can be inserted, and the overlap between the protrusion and the hooking portion is greater at the center of the box body than at the outer edge. [Effects of the Invention]
[0007] According to the present invention, the overlap between the protrusion and the hooking portion is large at the center of the box body, which is more flexible, and small at the outer edge of the box body, which is less flexible. As the protrusion is pressed down from a state where it is overlapped on the hooking portion, the overlapping amount decreases so that there is no unevenness in the overlap between the protrusion and the hooking portion at the center and outer edge of the box body. As a result, the protrusion is inserted into the slit in the hooking portion with a small amount of pressure, and the first and second face materials are temporarily fastened together, preventing wrinkles from occurring. [Brief explanation of the drawings]
[0008] [Figure 1] FIG. 1 is a perspective view of a packaging box according to a first embodiment. [Figure 2] FIG. 10 is a diagram showing a temporary fastening structure of a comparative example. [Figure 3] FIG. 2 is a plan view of the sheet material of the first embodiment. [Figure 4] 1A and 1B are explanatory diagrams of a temporary fastening structure according to a first embodiment. [Figure 5] 10A and 10B are diagrams showing a modified example of the temporary fastening structure of the first embodiment. [Figure 6] 10A and 10B are diagrams showing a modified example of the hook portion of the first embodiment. [Figure 7] 10A and 10B are explanatory diagrams of a temporary fastening structure according to a second embodiment. [Figure 8] 10A and 10B are diagrams showing a modified example of the temporary fastening structure of the second embodiment. DETAILED DESCRIPTION OF THE INVENTION
[0009] Hereinafter, this embodiment will be described with reference to the drawings. Arrows Fr, Rr, L, R, U, and Lo in each drawing indicate the front, rear, left, right, upper, and lower sides when the packaging box is viewed from the front. Furthermore, although terms indicating directions and positions are used in this embodiment, these terms are used for convenience of explanation and do not limit the technical scope of the present invention.
[0010] First Embodiment A packaging box equipped with a temporary fastening structure of a first embodiment will be described with reference to Figures 1 to 3. Figure 1 is a perspective view of the packaging box of the first embodiment. Figure 2 is a diagram showing a temporary fastening structure of a comparative example. Figure 3 is a plan view of the sheet material of the first embodiment.
[0011] As shown in FIG. 1, the packaging box 1 is a so-called Type A corrugated cardboard box, and is formed so that it can be temporarily fastened with outer lid flaps 16a, 16b. The packaging box 1 has short walls 11a, 11b that face each other in the left-right direction and long walls 12a, 12b that face each other in the front-rear direction. Inner bottom flaps 13a, 13b (see FIG. 3) are continuous with the lower edges of the short walls 11a, 11b, and outer bottom flaps 14a, 14b (see FIG. 3) are continuous with the lower edges of the long walls 12a, 12b. The inner bottom flaps 13a, 13b are folded inside (upper side of) the outer bottom flaps 14a, 14b, and the outer bottom flaps 14a, 14b are glued to the inner bottom flaps 13a, 13b to form the bottom wall.
[0012] Inner-lid flaps 15a, 15b are connected to the upper edges of the short walls 11a, 11b, and outer-lid flaps 16a, 16b are connected to the upper edges of the long walls 12a, 12b. A pair of protrusions 21 is provided on outer-lid flap (first face member) 16a, and a pair of hooking portions 25 is provided on outer-lid flap (second face member) 16b. The inner-lid flaps 15a, 15b are folded inside (underside) the outer-lid flaps 16a, 16b, and the protrusions 21 of the outer-lid flap 16a are hooked to the hooking portions 25 of the outer-lid flap 16b, thereby temporarily fastening the outer-lid flaps 16a, 16b. The packaging box 1 is sealed by attaching a slip or the like to the outer surface of the outer-lid flaps 16a, 16b.
[0013] 2(A), in the temporary fastening structure 91 of the comparative example, a protrusion 93 is provided at the tip of the outer lid flap 92a, and a fin-shaped hooking portion 96 is provided on the tip side of the outer lid flap 92b. The hooking portion 96 has a slit 97 into which the protrusion 93 is inserted. The tip 94 of the protrusion 93 and the slit 97 of the hooking portion 96 extend in the left-right direction, and the tip 94 and the slit 97 are formed parallel to each other. Before the outer lid flaps 92a, 92b are temporarily fastened together, the protrusion 93 is overlapped on the hooking portion 96, and the overlapping amount of the hooking portion 96 and the protrusion 93 is the same on the center side and the outer edge side of the packaging box.
[0014] 2(B), when protrusion 93 is pushed in, the overlap between hooking portion 96 and protrusion 93 decreases, and tip 94 of protrusion 93 is inserted into slit 97 of hooking portion 93. Because the outer edge side of packaging box 90 is less likely to bend than the center side, the overlap between hooking portion 96 and protrusion 93 decreases significantly at the center side of packaging box 90, but decreases only slightly at the outer edge side of packaging box 90. In order to temporarily fasten outer lid flaps 92a, 92b, protrusion 93 must be pushed in deeply, which may cause wrinkles in outer lid flaps 92a, 92b.
[0015] Therefore, in the temporary fastening structure 20 of the packaging box 1 of the first embodiment, the overlapping amount between the protrusion 21 and the hooking portion 25 is changed between the center side and the outer edge side of the packaging box 1 in consideration of the bending tendency of the center side and the outer edge side of the packaging box 1 (see FIG. 4). The overlapping amount between the protrusion 21 and the hooking portion 25 is made larger at the center side of the packaging box 1 which is more prone to bending, and is made smaller at the outer edge side of the packaging box 1 which is less prone to bending. This makes it possible to temporarily fasten the pair of outer lid flaps 16a, 16b without deeply pressing them in. Details of the temporary fastening structure 20 of the packaging box 1 will be described later.
[0016] As shown in Figure 3, the sheet material 5 shows the packaging box 1 in an unfolded state, and is formed by applying various processes to a single piece of cardboard sheet made of paper produced by a corrugator using a flexo folder gluer. The cardboard sheet is a double-sided cardboard sheet in which a front liner and a back liner are bonded to a corrugated core 6. Note that Figure 3 shows the cardboard sheet as seen from the front liner side. In the following explanation, the direction in which the corrugation crests of the core 6 of the cardboard sheet extend is referred to as the "corrugation direction X," and the direction perpendicular to the core 6 of the cardboard sheet is referred to as the "flow direction Y."
[0017] In the sheet material 5, a seam 17, long walls 12a, short walls 11a, long walls 12b, and short walls 11b are lined up on one side of the flow direction Y via fold lines L1-L4. Rectangular outer lid flaps 16a, 16b are connected to one side of the long walls 12a, 12b in the row direction X via fold lines L5, L6, and rectangular outer bottom flaps 14a, 14b are connected to the other side of the long walls 12a, 12b in the row direction X via fold lines L7, L8. Rectangular inner lid flaps 15a, 15b are connected to one side of the short walls 11a, 11b in the row direction X via fold lines L9, L10, and rectangular inner bottom flaps 13a, 13b are connected to the other side of the short walls 11a, 11b in the row direction X via fold lines L11, L12.
[0018] The seam 17 is formed in a substantially trapezoidal shape, while the long walls 12a, 12b, short walls 11a, 11b, outer lid flaps 16a, 16b, outer bottom flaps 14a, 14b, inner lid flaps 15a, 15b, and inner bottom flaps 13a, 13b are formed in a rectangular shape. The fold lines L1-L12 are formed by creases. A crease refers to a crease formed by linearly squeezing the cardboard sheet from the back liner side. The creases L1-L12 may be formed by other creases, such as lead creases, as long as the cardboard sheet is foldable. A lead crease refers to a crease formed by intermittently forming multiple cuts on a crease.
[0019] A pair of protrusions 21 are provided at one end edge in the tier direction X of the lid outer flap 16a, spaced apart in the flow direction Y. A pair of hooking portions 25 are provided at one end side in the tier direction X of the lid outer flap 16b, spaced apart in the flow direction Y. The pair of protrusions 21 and the pair of hooking portions 25 are formed at positions that correspond to when the packaging box 1 is assembled from the sheet material 5. The pair of protrusions 21 are formed in a substantially rectangular shape, and the pair of hooking portions 25 are formed in a fin shape by a square U-shaped cut. A temporary fastening structure 20 is formed by the pair of protrusions 21 of the lid outer flap 16a and the pair of hooking portions 25 of the lid outer flap 16b.
[0020] The temporary fastening structure of the first embodiment will be described with reference to Fig. 4. Fig. 4 is an explanatory diagram of the temporary fastening structure of the first embodiment. Fig. 4(A) shows the state before the pair of outer lid flaps are temporarily fastened, Fig. 4(B) shows the state during the pair of outer lid flaps are temporarily fastened, and Fig. 4(C) shows the state after the pair of outer lid flaps have been temporarily fastened.
[0021] As shown in Figure 4(A), the tip end of outer lid flap 16a overlaps the tip end of outer lid flap 16b from the outside (upper side). Protrusion 21 of outer lid flap 16a and hooking portion 25 of outer lid flap 16b are provided in positions that are off-center of packaging box 1. Tip 22 of protrusion 21 is formed parallel to the left-right direction. An opening 27 is formed in front of hooking portion 25, and the tip of hooking portion 25 forms a slit 26 into which protrusion 21 is inserted. Slit 26 of hooking portion 25 is inclined from the center side in the left-right direction (toward the center of the box body) toward the outside (toward the outer edge of the box body) so as to approach tip 22 of protrusion 21.
[0022] For this reason, when the protrusions 21 are placed on the hooking portions 25 before the outer-lid flaps 16a, 16b are temporarily fastened, the overlapping amount between the protrusions 21 and the hooking portions 25 is greater at the center in the left-right direction than at the outside in the left-right direction. At the outside in the left-right direction, the distance D1 between the tip 22 of the protrusions 21 and the slit 26 of the hooking portions 25 is small, while at the center in the left-right direction, the distance D2 between the tip 22 of the protrusions 21 and the slit 26 of the hooking portions 25 is large. In this way, the overlapping amount between the protrusions 21 and the hooking portions 25 is small at the outside in the left-right direction where the packaging box 1 is less likely to bend, and is greater at the center in the left-right direction where the packaging box 1 is more likely to bend.
[0023] 4(B), as protrusion 21 is pushed in from a state in which protrusion 21 is overlapped on hooking portion 25, the amount of overlap between protrusion 21 and hooking portion 25 decreases so as to eliminate bias at the outer and central sides in the left-right direction. That is, the decrease in distance D1 between tip 22 of protrusion 21 and slit 26 of hooking portion 25 is small at the outer side in the left-right direction where packaging box 1 is less likely to bend, and the decrease in distance D2 between tip 22 of protrusion 21 and slit 26 of hooking portion 25 is large at the central side in the left-right direction where packaging box 1 is more likely to bend. As distances D1 and D2 between tip 22 of protrusion 21 and slit 26 of hooking portion 25 narrow, tip 22 of protrusion 21 and slit 26 of hooking portion 25 become closer to being parallel.
[0024] As shown in Figure 4(C), after a gap is formed between the tip 22 of the protrusion 21 and the slit 26 of the hooking portion 25, the pushing of the protrusion 21 is stopped, and the tip 22 of the protrusion 21 is inserted into the slit 26 of the hooking portion 25. The protrusion 21 enters the inside (lower side) of the hooking portion 25, and the protrusion 21 is hooked by the hooking portion 25. Even if there is variation in the amount of bending between the center and outer sides of the protrusion 21 in the left-right direction, the amount of pushing of the protrusion 21 can be reduced. In this way, the outer lid flaps 16a, 16b can be temporarily fastened by simply lightly pushing the protrusion 21.
[0025] As described above, according to the first embodiment, the overlapping amount between the pair of protrusions 21 and the pair of hooking portions 25 is large at the center of the packaging box 1, which is prone to bending, and is small at the outer edge of the packaging box 1, which is less prone to bending. As the pair of protrusions 21 is pushed in from a state in which the pair of protrusions 21 is overlapped on the pair of hooking portions 25, the overlapping amount decreases so that there is no bias in the overlapping amount between the pair of protrusions 21 and the pair of hooking portions 25 at the center and outer edge of the packaging box 1. Therefore, with a small amount of pushing, the pair of protrusions 21 is inserted into the slits 26 of the pair of hooking portions 25, and the outer-lid flaps 16a, 16b are temporarily fastened, thereby preventing wrinkles from occurring.
[0026] In the first embodiment, the slits of the hooking portion are inclined, but at least one of the slits of the hooking portion and the tip of the protrusion may be inclined. Also, in the first embodiment, the hooking portion is formed by a notch and an opening, but the hooking portion may be formed by any of an opening, a notch, and a notch. A modified example of the temporary fastening structure of the first embodiment will be described with reference to Figs. 5 and 6. Fig. 5 is a diagram showing a modified example of the temporary fastening structure of the first embodiment. Fig. 6 is a diagram showing a modified example of the hooking portion of the first embodiment.
[0027] For example, as shown in FIG. 5(A), the slit 34 of the hook portion 33 may be parallel to the left-right direction, and the tip 32 of the protrusion 31 may be inclined so as to approach the slit 34 of the hook portion 33 from the center toward the outside in the left-right direction. Also, as shown in FIG. 5(B), the slit 39 of the hook portion 38 and the tip 37 of the protrusion 36 may be inclined so as to approach each other from the center toward the outside in the left-right direction. Furthermore, as shown in FIG. 5(C), if the overlapping amount between the hook portion 43 and the protrusion 41 is greater at the center than at the outer edges in the left-right direction, the slit 44 of the hook portion 43 and the tip 42 of the protrusion 41 may be formed in a wavy shape. Furthermore, although not shown, if the overlapping amount between the hook portion 43 and the protrusion 41 is greater at the center than at the outer edges in the left-right direction, the slit 44 of the hook portion 43 and the tip 42 of the protrusion 41 may be inclined so as to include a horizontal portion in part. Furthermore, the inclination of the slit 44 and the tip 42 is not limited to a linear inclination, but may be an inclination in the shape of a convex arc or a concave arc.
[0028] 6(A), for example, the hook portion 51 may be formed by an opening 52, and a protrusion may be inserted into a slit 53 at the rear edge of the opening 52. Alternatively, as shown in FIG. 6(B), the hook portion 56 may be formed by a notch 57, and a protrusion may be inserted into a slit 58 at the rear edge of the notch 57. Alternatively, as shown in FIG. 6(C), the hook portion 61 may be formed by an H-shaped notch 62, and a protrusion may be inserted into a slit 63 on the left and right sides of the notch 62. Furthermore, as shown in FIG. 6(D), the hook portion 66 may be formed by an inverted U-shaped notch 67, and a protrusion may be inserted into a slit 68 on the left and right sides of the notch 67.
[0029] Even with this configuration, the overlap between the protrusion and the hooking portion can be increased near the center of the packaging box, which is more flexible, and decreased near the outer edge of the packaging box, which is less flexible. As the protrusion is pushed in from a state where it is overlapped on the hooking portion, the tip of the protrusion and the slit in the hooking portion become closer to parallel, reducing the overlap between the protrusion and the hooking portion. Therefore, with a small amount of pushing, the protrusion can be inserted into the slit in the hooking portion, temporarily fastening the outer lid flaps together. Furthermore, the hooking portion can be formed on the outer lid flap with a simple configuration such as an opening, notch, or cutout.
[0030] <Second embodiment> The temporary fastening structure of the second embodiment will be described with reference to Figure 7. The temporary fastening structure of the second embodiment differs from the temporary fastening structure of the first embodiment in that, instead of making the slits of the hooking portion and the tips of the protrusions parallel, the hooking portion is formed to be less likely to bend closer to the center of the packaging box than to the outer edge. Therefore, with regard to the temporary fastening structure of the second embodiment, explanation of the same configuration as in the first embodiment will be omitted as much as possible. Figure 7 is an explanatory diagram of the temporary fastening structure of the second embodiment. Note that Figure 7(A) shows the state before the pair of outer lid flaps are temporarily fastened, Figure 7(B) shows the state in the middle of the pair of outer lid flaps being temporarily fastened, and Figure 7(C) shows the state after the pair of outer lid flaps have been temporarily fastened.
[0031] As shown in Figure 7(A), the tip side of outer lid flap 71a overlaps the tip side of outer lid flap 71b from the outside (upper side). Protrusion 72 of outer lid flap 71a and hooking portion 75 of outer lid flap 71b are provided in positions that are off-center of the packaging box. Hooking portion 75 is formed into a fin shape by a square U-shaped cut, and an opening 77 is formed in front of hooking portion 75. The tip of hooking portion 75 has a slit 76 into which protrusion 72 is inserted. Tip 73 of protrusion 72 and slit 76 of hooking portion 75 extend in the left-right direction, and tip 73 and slit 76 are formed parallel to each other.
[0032] Therefore, even when the protrusions 72 are overlapped on the hooking portions 75 before the outer-lid flaps 71a, 71b are temporarily fastened, the overlapping amount between the protrusions 72 and the hooking portions 75 is the same on the outer and central sides in the left-right direction. However, a side edge 79 of the hooking portion 75 on the central side in the left-right direction is shorter than a side edge 78 of the hooking portion 75 on the outer side in the left-right direction, so that the hooking portion 75 is less likely to bend on the central side than on the outer side in the left-right direction. In this way, the hooking portion 75 is more likely to bend on the outer side in the left-right direction where the packaging box is less likely to bend, and the protrusions 72 are less likely to bend on the central side in the left-right direction where the packaging box is more likely to bend, so that the ease of bending of the hooking portions 75 is uniform on the outer and central sides in the left-right direction.
[0033] 7(B), when protrusion 72 is pushed in from a state in which protrusion 72 is overlapped on hooking portion 75, tip 73 of protrusion 72 and slit 76 of hooking portion 75 remain parallel to each other, while the amount of overlap between protrusion 72 and hooking portion 75 decreases. That is, at the outer side in the left-right direction where the packaging box is less likely to bend, hooking portion 75 is bent more by the pushing of protrusion 72, and at the center side in the left-right direction where the packaging box is more likely to bend, hooking portion 75 is bent less by the pushing of protrusion 72. The distance between tip 73 of protrusion 72 and slit 76 of hooking portion 75 is narrowed in the same way at both the outer side and the center in the left-right direction.
[0034] As shown in Figure 7(C), after a gap is formed between the tip 73 of the protrusion 72 and the slit 76 of the hook 75, the pushing of the protrusion 72 is stopped, and the tip 73 of the protrusion 72 is inserted into the slit 76 of the hook 75. The protrusion 72 enters the inside (lower side) of the hook 75, and the protrusion 72 is hooked by the hook 75. Even if there is a difference in the amount of deflection between the center and outer sides of the protrusion 72 in the left-right direction, the pushing amount of the protrusion 72 can be reduced. In this way, the outer lid flaps 71a, 71b can be temporarily fastened by simply lightly pushing the protrusion 72.
[0035] As described above, according to the second embodiment, the pair of hooking portions 75 are less likely to bend at the center of the packaging box, which is more likely to bend, and are more likely to bend at the outer edge of the packaging box, which is less likely to bend, so that the ease of bending of the pair of hooking portions 75 is uniform between the center and outer edge of the packaging box. When the pair of protrusions 72 is pushed in from a state in which the pair of protrusions 72 is overlapped on the pair of hooking portions 75, the amount of overlap between the pair of protrusions 72 and the pair of hooking portions 75 decreases while the tips 73 of the pair of protrusions 72 and the slits 76 of the pair of hooking portions 75 remain parallel. Therefore, with a small amount of pushing, the pair of protrusions 72 are inserted into the slits 76 of the pair of hooking portions 75, and the outer-lid flaps 71a, 71b are temporarily fastened, thereby preventing wrinkles from occurring.
[0036] In the second embodiment, the hooking portion is formed by a U-shaped notch. However, the hooking portion may be formed so as to be less likely to bend toward the center of the packaging box than toward the outer edge. For example, as shown in FIG. 8, the hooking portion 81 may be formed in a fin shape by an L-shaped notch. In this case, side edges 82 of the hooking portion 81 are formed on the outer sides in the left-right direction, and no side edges of the hooking portion 81 are formed on the center side in the left-right direction. By positioning the side edges 82 of the hooking portion 81 on the outer sides in the left-right direction, the hooking portion 81 is formed so as to be less likely to bend toward the center side of the packaging box than toward the outer edge. Even with this configuration, the ease of bending of the hooking portion 81 can be made uniform between the center side and the outer edge side of the packaging box.
[0037] In the first and second embodiments, a pair of outer lid flaps are exemplified as the first and second face materials, but the first and second face materials may be any face materials that can be temporarily fastened. For example, the first face material may be the outer lid flap and the second face material may be the inner lid flap, with a temporary fastening structure formed between the outer lid flap and the inner lid flap. In this case, a protrusion may be provided on the outer lid flap, and a hook may be provided on the inner lid flap.
[0038] Furthermore, in the first and second embodiments, an A-type cardboard box is exemplified as the box body, but the box body may be a sleeve-type box body used as a lid-integrated tray or a cushioning material.
[0039] In addition, in the first and second embodiments, the temporary fastening structure is formed by a pair of protrusions and a pair of hooking portions, but the temporary fastening structure may be formed by a single protrusion and a single hooking portion, or the temporary fastening structure may be formed by three or more protrusions and a single hooking portion.
[0040] In addition, in the first and second embodiments, the packaging box is formed from a double-sided corrugated cardboard sheet, but the packaging box may also be formed from a single-sided corrugated cardboard sheet, a double-sided corrugated cardboard sheet, single paper, thick paper, a resin sheet, etc.
[0041] As described above, the first aspect is a temporary fastening structure (20) for a first panel (lid outer flap 16a) and a second panel (lid outer flap 16b) that constitute one surface of a box body (packaging box 1), and includes a protrusion (21) provided on the first panel and a hooking portion (25) provided on the second panel. The first panel overlaps the second panel from the outside, and a slit (26) is formed in the hooking portion through which the protrusion is inserted. The overlapping amount between the protrusion and the hooking portion is greater at the center of the box body than at the outer edge. With this configuration, the overlapping amount between the protrusion and the hooking portion is greater at the center of the box body, which is more flexible, and smaller at the outer edge of the box body, which is less flexible. As the protrusion is pushed in from a state in which it overlaps the hooking portion, the overlapping amount decreases so that the unevenness in the overlapping amount between the protrusion and the hooking portion is eliminated at the center and outer edge of the box body. As a result, the protrusion can be inserted into the slit in the hooking portion with a small amount of pressure, temporarily fastening the first and second face materials together and preventing wrinkles from occurring.
[0042] In the second embodiment, in the first embodiment, at least one of the tip (22) of the protrusion and the slit of the hooking portion is inclined. This configuration allows for a large overlap between the protrusion and the hooking portion near the center of the box, which is easily bent, and a small overlap between the protrusion and the hooking portion near the outer edge of the box, which is less likely to bend. As the protrusion is pushed in from a state in which it is overlapped on the hooking portion, the tip of the protrusion and the slit of the hooking portion become closer to being parallel, reducing the overlap between the protrusion and the hooking portion. Therefore, the protrusion can be inserted into the slit of the hooking portion with a small amount of pushing, temporarily fastening the first and second panel members.
[0043] In the third aspect, in the first or second aspect, the hooking portion is formed by an opening, a notch, or a cutout. With this configuration, the hooking portion can be formed in the second panel with a simple configuration such as an opening, a notch, or a cutout.
[0044] In a fourth aspect, in any one of the first to third aspects, the protrusions and the hooking portion are provided at positions that are off the center of the box body. With this configuration, even if there is variation in the amount of deflection between the center and outer sides of the pair of protrusions in the left-right direction, the amount of pushing in of the pair of protrusions can be reduced.
[0045] The fifth aspect is a temporary fastening structure for a first panel (lid outer flap 71a) and a second panel (lid outer flap 71b) that constitute one side of a box, and includes a protrusion (72) provided on the first panel and a hook (75) provided on the second panel, the first panel overlaps the second panel from the outside, the hook has a slit (76) for receiving the protrusion, the tip (73) of the protrusion and the hook are parallel to the slit, the protrusion and the hook are located off-center, and the hook is formed to be less flexible at the center than at the outer edge of the box. With this configuration, the hook is less flexible at the center of the box, which is more flexible, and more flexible at the outer edge of the box, which is less flexible, so that the flexibility of the hook is uniform between the center and outer edge of the box. When the protrusion is pressed down from the state where it is overlapped on the hook, the tip of the protrusion and the slit in the hook remain parallel while the amount of overlap between the protrusion and the hook decreases. As a result, the protrusion is inserted into the slit in the hook with a small amount of pressure, and the first and second face materials are temporarily fastened together, preventing wrinkles from occurring.
[0046] In the sixth aspect, in the fifth aspect, the hooking portion is formed into a fin shape by a square U-shaped cut, and the side edge of the hooking portion on the central side of the box is shorter than the side edge of the hooking portion on the outer edge side of the box, so that the hooking portion is less likely to bend on the central side than on the outer edge side of the box. With this simple configuration, it is possible to make the ease of bending of the hooking portion uniform between the central side and the outer edge side of the box.
[0047] In the seventh aspect, in the fifth aspect, the hooking portion (81) is formed into a fin shape by an L-shaped cut, and the side edges of the hooking portion are located on the outer edge side of the box body, so that the hooking portion is less likely to bend at the center side than at the outer edge side of the box body. With this simple configuration, it is possible to make the ease of bending of the hooking portion uniform between the center side and the outer edge side of the box body.
[0048] An eighth aspect is a packaging box that is temporarily fastened by the temporary fastening structure of any one of aspects 1 to 7. According to this configuration, it is possible to reduce the amount of pressure that is required when temporarily fastening the packaging box.
[0049] Although the present embodiment has been described, other embodiments may be obtained by combining the above-described embodiments and modifications in whole or in part.
[0050] Furthermore, the technology of the present invention is not limited to the above-described embodiments, and may be variously modified, substituted, or altered within the scope of the spirit of the technical idea. Furthermore, if the technical idea can be realized in a different way due to technological advances or other derived technologies, it may be implemented using that method. Therefore, the claims cover all embodiments that may fall within the scope of the technical idea. [Explanation of symbols]
[0051] 1: Packaging box 5: Sheet material 16a, 71a: Outer lid flap (first surface material) 16b, 71b: outer lid flap (second surface material) 20: Temporary fastening structure 21, 72:Protrusion 22, 73: Tip 25, 75, 81: Latch part 26, 76: Break 78, 79, 82: Side edge
Claims
1. A temporary fastening structure of a first face material (16a) and a second face material (16b) constituting one surface of a box body (1), A protrusion (21) provided on the first face material; A hook portion (25) provided on the second face material, The first face material overlaps the second face material from the outside, The hook portion has a slit (26) formed therein into which the protrusion is inserted, A temporary fastening structure characterized in that the overlapping amount of the protrusion portion and the hooking portion is greater at the center side than at the outer edge side of the box body.
2. 2. The temporary fastening structure according to claim 1, wherein at least one of the tip (22) of the protrusion and the slit of the hook portion is inclined.
3. 2. The temporary fastening structure according to claim 1, wherein the hooking portion is formed by any one of an opening, a notch, and a cutout.
4. The temporary fastening structure according to claim 1, wherein the protrusion and the hook are provided at positions offset from the center of the box body.
5. A temporary fastening structure of a first face material and a second face material that constitute one face of a box body, A protrusion (72) provided on the first face material; A hook portion (75) provided on the second face material, The first face material overlaps the second face material from the outside, The hook portion has a slit (76) formed therein into which the protrusion is inserted, The tip (73) of the protrusion and the slit of the hook are formed parallel to each other, the protrusion and the hook are provided at positions off the center of the box body, A temporary fastening structure characterized in that the hook portion is formed to be less likely to bend toward the center of the box body than toward the outer edge.
6. The hook portion is formed in a fin shape by a U-shaped cut, The temporary fastening structure described in claim 5, characterized in that the side edge (79) of the hanging portion on the central side of the box body is shorter than the side edge (78) of the hanging portion on the outer edge side of the box body, thereby making the hanging portion less likely to bend on the central side of the box body than on the outer edge side.
7. The hook portion (81) is formed in a fin shape by an L-shaped cut, A temporary fastening structure as described in claim 5, characterized in that the side edge (82) of the hanging portion is located on the outer edge side of the box body, so that the hanging portion is less likely to bend toward the center than toward the outer edge side of the box body.
8. A packaging box that is temporarily fastened by the temporary fastening structure according to any one of claims 1 to 7.
Citation Information
Patent Citations
Packing box
JP4628487B1