Lid closing structure

Abstract

To provide a lid closing structure capable of providing user convenience.SOLUTION: A lid forming flap 21 includes a lid surface 22 that closes an opening 2 of a box, and an insertion piece 23 that is inserted into the opening 2 when the lid surface 22 closes the opening 2. A hole 25 is formed in the insertion piece 23. An insertion piece 15 is formed by a slit in a peripheral wall surface 11. When the lid forming flap 21 is closed, the lid forming flap 21 is inserted into the opening 2, the insertion piece 15 is folded toward the inside of the box, thus the insertion piece 15 is inserted and engaged with the hole 25 of the insertion piece 23, and the lid forming flap 21 is fixed to the peripheral wall surface 11.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a lid closing structure for closing a lid in a box such as a cardboard box.

Background Art

[0002] Conventionally, cardboard boxes have been widely used as packaging boxes. As such a cardboard box, a so-called A-type cardboard box in which flaps are extended on the length surface and the width surface forming the peripheral surface is common. In the A-type cardboard box, an upper lid and a bottom plate are formed by upper and lower flaps. As a method of sealing the upper lid and the bottom plate with the flaps, stapling and sticking an adhesive tape are generally performed.

[0003] Further, Patent Document 1 describes a cardboard case in which a fitting piece provided on a flap constituting an upper lid is engaged with a fitting notch for sealing.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the above-described sealing method using staples or an adhesive tape, corresponding tools must be prepared, and in most cases, the tools are not present at hand in a large work site. Therefore, it is necessary to go far to get the tools, and the sealing work has been extremely laborious. In particular, in the case of stapling, it is a task that is burdensome for the elderly, and there are problems such as damaging the stored items and having to remove them for separation after use.

[0006] In addition, the cardboard case described in Patent Document 1 seals the upper lid by inserting fitting pieces or the like at a plurality of locations between the flaps that constitute the upper lid. Therefore, the operation of closing the upper lid requires time and effort, and since the fitting pieces or the like are inserted into the unstable flaps for sealing, the closing strength cannot be said to be sufficient.

[0007] The present invention has been made in view of the above circumstances, and an object thereof is to provide a lid closing structure that can facilitate the use of the box.

Means for Solving the Problems

[0008] The lid closing structure of the present invention forms a box-shaped peripheral surface with a plate-shaped portion surrounding a space, forms an opening inside one side of the peripheral surface, and extends a flap at a part of one side of the peripheral surface to form a lid-forming flap. In the box, the lid-forming flap has a lid surface that closes the opening, and when the lid surface closes the opening, it has an insertion piece that is inserted inside the opening. A hole or a notch is formed in the insertion piece, and an insertion piece is formed on the peripheral surface by a notch. When closing the lid-forming flap, the lid-forming flap is inserted inside the opening, and the insertion piece is folded toward the inside of the box, so that the insertion piece is inserted into the hole or the notch of the insertion piece and meshes, and the lid-forming flap is fixed to the peripheral surface.

[0009] In addition, the lid closing structure of the present invention forms a box-shaped peripheral surface with a plate-like portion surrounding a space, forms an opening inside one side of the peripheral surface, and extends a flap on a part of one side of the peripheral surface to form a lid-forming flap. In the box, the lid-forming flap has a lid surface for closing the opening and an insertion piece that is inserted inside the opening when the lid surface closes the opening. In the lid-forming flap, a band portion formed by two cuts crossing the bending line between the lid surface and the insertion piece is formed. The peripheral surface has an insertion piece formed by a cut at a position in contact with or near the band portion when the insertion piece is inserted into the opening. When closing the lid-forming flap, the lid-forming flap is inserted inside the opening, and the insertion piece is folded toward the inside of the box, so that the band portion is bent toward the inside of the box, and both sides of the insertion piece are inserted into the openings formed on both sides of the band portion and engaged with each other to fix the lid-forming flap to the peripheral surface.

[0010] Furthermore, the insertion piece is formed by a connection portion on the proximal end side connected to the peripheral surface of the box and a wing portion having a portion larger than the connection portion.

Effect of the Invention

[0011] According to the present invention, the convenience of the user can be achieved.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0013] <First Embodiment> FIG. 1 is a first explanatory view showing a lid closing structure according to the first embodiment of the present invention. FIG. 2 is a second explanatory view showing a lid closing structure according to the first embodiment of the present invention. FIG. 3 is an explanatory view for explaining the basis of the hole shapes of the insertion piece and the insertion hole in the lid closing structure according to the first embodiment of the present invention. FIG. 4 is an explanatory view showing an example of the hole shapes of the insertion piece and the insertion hole in the lid closing structure according to the first embodiment of the present invention.

[0014] <Configuration of the Lid Closing Structure of the First Embodiment> In FIG. 1(a), the cardboard box 1 to which the lid closing structure of the first embodiment is applied is formed by folding cardboard, and has front, rear, left, and right peripheral wall portions 11 to 14 that form the peripheral surface of the box shape. The peripheral wall surfaces 11 to 14 are shaped to surround the front, rear, left, and right of the space by folding and pasting with paste margin pieces.

[0015] An opening 2 is formed on one side of the peripheral wall surfaces 11 to 14. The other side of the peripheral wall surfaces 11 to 14 is closed by a bottom surface 3. The bottom surface 3 is formed by fitting together bottom surface pieces extending from the other side of the peripheral wall surfaces 11 to 14.

[0016] On one side of the peripheral wall surface 12 which is a part of one side of the peripheral surface, a lid-forming flap 21 is extended.

[0017] The lid-forming flap 21 has a lid surface 22 for closing the opening 2 and an insertion piece 23 which extends from the lid surface 22 toward the tip and is inserted inside the opening 2 when the lid surface 22 closes the opening 2. The boundary between the lid surface 22 and the insertion piece 23 is bent toward the opening 2 side by a folding line 24.

[0018] A trapezoidal hole 25 is formed in the insertion piece 23. The long side of the trapezoidal hole 25 is located on or near the line of the folding line 24.

[0019] An insertion piece 15 is formed by a cut at the position of the peripheral wall surface 11 corresponding to the trapezoidal hole 25.

[0020] The insertion piece 15 is formed by a connection part 16 on the base end side connecting to the peripheral wall surface 11 and a wing part 17 having an equal-sized part wider than the connection part 16.

[0021] On one side of the peripheral wall surface 13, a short flap 18 for supporting the lid surface 22 when closing the opening 2 is extended.

[0022] On one side of the peripheral wall surface 14, a short flap 19 for supporting the lid surface 22 when closing the opening 2 is extended.

[0023] When closing the lid-forming flap 21, by inserting the insertion piece 23 of the lid-forming flap 21 inside the opening 2, as shown in FIG. 1(b), the lid surface 22 of the lid-forming flap 21 closes the opening 2.

[0024] After that, using the index finger 4 of the operator shown in FIG. 1(c), as shown in FIG. 2(a), pushing the insertion piece 15 with the index finger 4 and folding the insertion piece 15 toward the inside of the cardboard box 1, as shown in FIG. 2(b), the insertion piece 15 is inserted into the trapezoidal hole 25 of the insertion piece 23 and meshes, fixing the lid-forming flap 21 to the peripheral wall surface 11.

[0025] In this way, after the opening 2 is closed by the lid-forming flap 21 (after the lid is closed), the cardboard box 1 of the first embodiment can be locked by simply pushing the insertion piece 15 (specific part) inward with a finger.

[0026] Therefore, the cardboard box 1 can be locked without using an adhesive (such as glue) or an adhesive tape (such as a gum tape).

[0027] Also, the cardboard box 1 can have various lid-locking structures (locking mechanisms) depending on the variations in the shapes of the trapezoidal holes 25 of the insertion pieces 15 and the insertion pieces 23 on the peripheral wall surface 11.

[0028] Furthermore, in the cardboard box 1, depending on the shapes of the insertion pieces 15 and the holes 25 of the insertion pieces 23 on the peripheral wall surface 11, it is also possible to adopt a structure that cannot be opened without breaking a breaking line or the like. Therefore, if such a structure is applied to a delivery cardboard box or a mail-order cardboard box, security during transportation can be ensured.

[0029] In the cardboard box 1, if the lid-locking structure (locking mechanism) is of a shape different from the above, the lock can also be unlocked. Therefore, as a reusable specification, it is also possible to avoid being used up once.

[0030] In the first embodiment, as a development view of the cardboard box 1, no new protrusion parts or additional items are added. Therefore, the conventional paper mold can be used as it is, and it can function only by processing "holes" and "cuts".

[0031] <Detailed description of the main part of the first embodiment> The insertion piece 15 on the peripheral wall surface 11 is formed at a portion of the peripheral wall surface 11 corresponding to the hole 25 of the insertion piece 23 (at a position in close contact with the hole 25 or in its vicinity) when the opening 2 is closed by the lid-forming flap 21. When the insertion piece 15 is folded toward the hole 25 side of the insertion piece 23, the hole 25 and the wing part 17 of the insertion piece 15 are engaged, and the insertion piece 23 cannot be removed. Therefore, the lid by the lid-forming flap 21 cannot be opened.

[0032] In the following description, the direction in which the lid formed by the lid-forming flap 21 is opened is set to be upward or vertical.

[0033] Next, the special shapes of the hole 25 of the insertion piece 23 and the insertion piece 15 on the peripheral wall surface 11 will be described. For example, as shown in Fig. 3(a), when the shape of the hole 25a of the insertion piece 23 and the insertion piece 15a on the peripheral wall surface 11 of the cardboard box 1a are rectangular, even if the insertion piece 15a is folded inside, the hole 25a and the insertion piece 15a will not engage. Therefore, the lid (lid surface 22) formed by the lid-forming flap 21 cannot resist the upward external force trying to open it and will immediately open.

[0034] For example, as shown in Fig. 3(b), the shapes of both the hole 25b of the insertion piece 23 and the insertion piece 15b on the peripheral wall surface 11 of the cardboard box 1b are trapezoids in reverse. In this case, since the shape of the hole 25b of the insertion piece 23 has many places where it can engage with the insertion piece 15b on the peripheral wall surface 11, the lid formed by the lid-forming flap 21 resists the upward external force trying to open it.

[0035] However, when the shapes of the hole 25b of the insertion piece 23 and the insertion piece 15b on the peripheral wall surface 11 are exactly the same, there is a possibility that the insertion piece 15b may return to its original position due to vibrations during the transportation of the stored items inside the cardboard box.

[0036] For example, as shown in Fig. 3(c), assume a case where the shape of the insertion piece 15c on the peripheral wall surface 11 is slightly larger, such as having a wider part than the shape of the hole 25c of the insertion piece 23.

[0037] In this case, when folding the insertion piece 15c into the hole 25c, the insertion piece 15c is pushed in while bending, and when it is completely folded, the bending disappears and it returns to its original shape. In this situation, the insertion piece 15c will not be pushed out of the hole 25c due to vibrations during transportation or force majeure. Therefore, it becomes impossible to open the lid formed by the lid-forming flap 21 without breaking a pre-provided break line or using a special tool.

[0038] Here, in the scenarios of delivery and mail-order home delivery assumed as the application destinations of the first embodiment, the materials and strengths of the cardboard boxes in use vary. Depending on the materials and strengths, it is necessary to devise and adjust the shapes of the holes 25 of the insertion piece 23 and the wing portions 17 of the insertion piece 15. However, regardless of the materials and strengths, it is preferable to ensure, as much as possible, two items: the ease of folding the wing portion 17 and the strong resistance to the external force for opening the lid by the lid-forming flap 21.

[0039] The shapes of the holes 25 of the insertion piece 23 and the wing portions 17 of the insertion piece 15, which contribute to these two items, will be further described.

[0040] For the ease of folding the insertion piece 15, it is better to make the width of the upper part of the wing portion 17 close to the width of the hole 25 of the insertion piece 23. It is preferable to minimize the resistance at the start of the folding operation as much as possible, and to form a shape where the resistance occurs when it becomes "easy to apply force" after the wing portion 17 starts to enter the inside of the cardboard box 1.

[0041] Therefore, the portion of the wing portion 17 having a width wider than the width of the hole 25 of the insertion piece 23 is mainly at around the middle part as shown in Fig. 4(a), rather than at the upper part.

[0042] The part where the most load is applied when resisting the external force for opening the lid by the lid-forming flap 21 is the lower part of the wing portion 17. It is desirable that the shape of that part is a side with an angle close to horizontal so as to be able to resist the external force "upward".

[0043] The hole 25 of the insertion piece 23 and the wing portion 17 of the insertion piece 15 have the same width at the uppermost part, and from there, the difference in width gradually widens towards the central part, and after passing the central part, the difference in width also shrinks. With such a shape, when folding the wing portion 17, not only is the initial pushing-in smooth, but also a feeling of "click" can be obtained when the folding is finished.

[0044] Therefore, the shapes of the hole 25 of the insertion piece 23 and the wing portion 17 of the insertion piece 15 of the peripheral wall surface 11 shown in FIGS. 1 and 2 are more suitable for the cardboard box 1 than the examples shown in FIGS. 3(a), 3(b), and 3(c).

[0045] Here, regarding the shapes of the hole 25 of the insertion piece 23 and the wing portion 17 of the insertion piece 15, if the condition that the width at the uppermost part is the same, the width difference gradually widens from there to the central part, and the width difference shrinks again after passing the central part is satisfied, as shown in FIG. 4(b), it is also possible to make the sides 25L and 25R on both the left and right sides of the hole 25 into curves that protrude inward.

[0046] In addition, in the first embodiment shown in FIGS. 1, 2, and 4, the hole 25 of the insertion piece 23 is used as the insertion portion into which the wing portion 17 of the insertion piece 15 is inserted. However, as the insertion portion, a cut having a shape close to the inner circumference of the hole 25 may be formed in the insertion piece 23.

[0047] Also, the shapes of the insertion piece 15 and the hole 25 are not limited to the shapes shown in FIG. 1, and various shapes such as an ellipse, a square, and a trapezoid are applicable.

[0048] <Configuration and Effects of the First Embodiment> Summarizing the configuration and effects of the first embodiment, the lid closing structure of the first embodiment forms a box-shaped peripheral surface with a plate-shaped portion (peripheral wall surfaces 11 to 14) surrounding the space, forms an opening 2 inside one side of the peripheral surface, and extends a flap on a part (peripheral wall surface 12) of one side of the peripheral surface to form a lid-forming flap 21. In the box (cardboard box 1), the lid-forming flap 21 has a lid surface 22 that closes the opening 2 and an insertion piece 23 that is inserted inside the opening 2 when the lid surface 22 closes the opening 2. A hole 25 or a cut is formed in the insertion piece 23, and an insertion piece 15 is formed on the peripheral surface by a cut. When closing the lid-forming flap 21, the lid-forming flap 21 is inserted inside the opening 2, and the insertion piece 15 is folded toward the inside of the box, so that the insertion piece 15 is inserted into the hole 25 or the cut of the insertion piece 23 and meshes, and the lid-forming flap 21 is fixed to the peripheral surface.

[0049] The insertion piece 15 is formed by a connection part 16 on the proximal end side that connects to the peripheral surface of the box and a wing part 17 having a portion larger than the connection part 16.

[0050] Due to having such a configuration, when closing the lid forming flap 21 in the lid closing structure of the first embodiment, the lid forming flap 21 can be inserted inside the opening 2, and the insertion piece 15 can be folded toward the inside of the box (corrugated box 1). Thus, the labor and time in the operation of closing the lid forming flap 21 can be reduced. Further, since the lid forming flap 21 is fixed to the peripheral surface of the box (corrugated box 1) by the hole 25 and the insertion piece 15 formed on the peripheral surface of the box (corrugated box 1), the closing strength is improved. Accordingly, a lid closing structure that can facilitate the user of the box can be provided.

[0051] <Application Example of the First Embodiment> FIG. 5 is a perspective view of a corrugated box showing an application example of the first embodiment of the present invention. FIG. 6(a) is a plan view showing an enlarged view around the folding line of the lid forming flap showing an application example of the first embodiment of the present invention. FIG. 6(b) is a plan view showing an enlarged view around the insertion piece of the peripheral wall surface 11 showing an application example of the first embodiment of the present invention.

[0052] In the application example of the first embodiment, the same parts as those in the first embodiment shown in FIGS. 1, 2, and 4 are denoted by the same reference numerals and the description thereof is omitted.

[0053] In FIGS. 5 and 6, the corrugated box 51 of the application example of the first embodiment of the present invention forms left, middle, and right eaves 71L, 71M, and 71R at three locations between the folding lines 64 of the lid forming flap 61.

[0054] The eaves 71L, 71M, and 71R are formed so as to extend from the lid surface 62 by cuts.

[0055] In addition, in this application example, left and right breaking lines 72L and 72R necessary for opening the lid forming flap 61 are formed following the lid surface 62 from both left and right sides of the eaves 71M. The peripheral wall surface 11 has the same structure as that of the first embodiment shown in FIGS. 1, 2, and 4.

[0056] When the insertion pieces 63 of the lid forming flap 61 are inserted inside the opening 2, the eaves 71L, 71M, and 71R are locked to the edge of the opening 2, and the position of the trapezoidal hole 65 of the insertion piece 63 shown in FIG. 6(a) and the position of the insertion piece 15 of the peripheral wall surface 11 shown in FIG. 6(b) are accurately aligned.

[0057] When opening the lid forming flap 21, the eaves 71M are pulled upward with a finger, and the lid surface 62 following the eaves 71M is broken by the breaking lines 72L and 72R, so that the insertion piece 15 can be pulled out from the hole 25.

[0058] According to such an application example of the first embodiment, it has the same effects as those of the first embodiment shown in FIGS. 1, 2, and 4, and when the insertion pieces 63 of the lid forming flap 61 are inserted inside the opening 2, the position of the trapezoidal hole 65 of the insertion piece 63 and the position of the insertion piece 15 of the peripheral wall surface 11 can be easily and accurately aligned.

[0059] <Second Embodiment> FIG. 7 is a first explanatory diagram showing a lid closing structure according to the second embodiment of the present invention. FIG. 8 is a second explanatory diagram showing a lid closing structure according to the second embodiment of the present invention.

[0060] In the second embodiment, the same parts as those of the first embodiment shown in FIGS. 1, 2, and 4 are denoted by the same reference numerals, and the description thereof is omitted.

[0061] <Configuration of the Lid Closing Structure of the Second Embodiment>

[0062] In FIG. 7(a), the cardboard box 101 to which the lid closing structure of the second embodiment is applied is formed by bending cardboard, and is composed of peripheral wall surfaces 11 to 14 that form a box-shaped peripheral surface.

[0063] An opening 2 is formed on one side of the peripheral walls 11 to 14. The other side of the peripheral walls 11 to 14 is closed by a bottom surface 3. The bottom surface 3 is formed by fitting together bottom pieces extending from the other side of the peripheral walls 11 to 14.

[0064] A lid forming flap 121 is extended on one side of the peripheral wall 12 which is a part of one side of the peripheral surface.

[0065] The lid forming flap 121 has a lid surface 122 for closing the opening 2 and an insertion piece 123 extending from the lid surface 122 toward the tip and inserted inside the opening 2 when the lid surface closes the opening 2. The boundary between the lid surface 122 and the insertion piece 123 is bent toward the opening 2 side by a folding line 124.

[0066] A band portion 127 is formed on the lid forming flap 121 by two cuts 125 and 126 that cross the folding line 124 between the lid surface 122 and the insertion piece 123.

[0067] The band portion 127 is composed of a band portion 127a on the lid surface 122 side and a band portion 127b on the insertion piece 123 side. The band portion 127a on the lid surface 122 side has the cuts 125 and 126 being straight and parallel, and the width being constant toward the tip side. The band portion 127b on the insertion piece 123 side has the cuts 125 and 126 being straight, and in the portion of the insertion piece 123, it is a cut having the shape of the hole 25 described with reference to FIGS. 1 to 4.

[0068] A plurality of lateral cuts 128 are formed in the band portion 127 so that it can be easily bent inside the box by an external force.

[0069] An insertion piece 15 formed by a cut is formed in the peripheral wall 11 at a position in contact with or near the band portion 127b on the insertion piece 123 side when the insertion piece 123 is inserted into the opening 2.

[0070] The insertion piece 15 is formed by a connection part 16 on the proximal end side that connects to the peripheral wall surface 11 and a wing part 17 having an equal-sized part wider than the connection part 16.

[0071] When closing the lid-forming flap 121, by inserting the insertion piece 123 of the lid-forming flap 121 inside the opening 2, as shown in FIG. 7(b), the lid surface 122 of the lid-forming flap 121 closes the opening 2.

[0072] After that, as shown in FIG. 7(c), by pressing the insertion piece 15 with the index finger 4 and folding the insertion piece 15 toward the inside of the cardboard box 101, the band part 127 bends toward the inside and outside of the box, and both sides of the wing part 17 of the insertion piece 15 are inserted into the apertures 129L and 129R formed on both sides of the band part 127 and engage with each other. As shown in FIG. 7(d), the lid-forming flap 121 is fixed to the peripheral wall surface 11.

[0073] In this way, the cardboard box 101 can be closed (locked) simply by pushing the insertion piece 15 (specific part) inward with a finger after closing the opening 2 with the lid-forming flap 121 (after closing the lid). Therefore, the cardboard box 101 can be closed (locked) without using an adhesive (glue) or an adhesive tape (sticky tape).

[0074] In the insertion piece 123 of the lid-forming flap 121, instead of a "hole", two cuts 125 and 126 connected from the lid surface 122 are provided, and a band portion 127b with an inverted trapezoidal portion is provided. To easily bend it inside the box by an external force, several horizontal cuts 128 are also made. When the wing portion 17 of the insertion piece 15 is pushed into such a portion, the band portion 127 partially enters the box while receiving the wing portion 17. Therefore, even when it is closed (locked), as shown in Fig. 8(a), for example, the band portion 127 is pulled with the index finger 4 and the thumb 5, and as shown in Fig. 8(b), the wing portion 17 of the insertion piece 15 is pinched with the index finger 4 and the thumb 5 and pulled out from inside the box, so that, as shown in Fig. 8(c), the closure (lock) can be released. For this reason, the cardboard box 101 can also avoid being used up once as a reusable specification.

[0075] In addition, the shapes of the insertion piece 15 and the band portion 127 are not limited to the shapes shown in Figs. 7 and 8, and various shapes such as an ellipse, a square, and a trapezoid can be applied.

[0076] By varying the shapes of the insertion piece 15 on the peripheral wall surface 11 and the band portion 127 of the insertion piece 123, various lid closing structures (locking mechanisms) can be achieved.

[0077] As a development view of the cardboard box 101, since no new protrusion or addition is made, the conventional paper mold can be used as it is, and it can function only by processing "holes" and "cuts".

[0078] <Configuration and Effects of the Second Embodiment> Summarizing the configuration and effects of this embodiment, the lid closing structure of the second embodiment forms a box-shaped peripheral surface with a plate-shaped portion (peripheral wall surfaces 11 to 14) surrounding a space, forms an opening 2 inside one side of the peripheral surface, and extends a flap on a part (peripheral wall surface 12) of one side of the peripheral surface to form a lid-forming flap 121. In the box (corrugated box 101), the lid-forming flap 121 has a lid surface 122 for closing the opening 2 and an insertion piece 123 that is inserted inside the opening 2 when the lid surface 122 closes the opening 2. Two cuts 125 and 126 that cross the folding line 124 between the lid surface 122 and the insertion piece 123 form a band portion 127 on the lid-forming flap 121. The peripheral surface has an insertion piece 15 formed by a cut at a position in contact with or near the band portion 127 when the insertion piece 123 is inserted into the opening 2. When closing the lid-forming flap 121, the lid-forming flap 121 is inserted inside the opening 2, and the insertion piece 15 is folded toward the inside of the box, causing the band portion 127 to bend toward the inside of the box. Both sides of the insertion piece 15 are inserted into and engaged with the apertures 129L and 129R formed on both sides of the band portion 127, thereby fixing the lid-forming flap 121 to the peripheral surface. This is characterized by the above.

[0079] The insertion piece 15 is characterized by being formed of a connection portion 16 on the proximal end side connected to the peripheral surface of the box and a wing portion 17 having a portion larger than the connection portion 16.

[0080] Due to having such a configuration, when closing the lid-forming flap 121, the lid closing structure of the second embodiment only needs to insert the lid-forming flap 121 inside the opening 2 and fold the insertion piece 15 toward the inside of the box, so the labor and time in the operation of closing the lid-forming flap 121 can be reduced. Also, the front lid-forming flap 121 is fixed to the peripheral surface of the box (corrugated box 101) by the apertures 129L and 129R formed on both sides of the band portion 127 and the insertion piece 15 formed on the peripheral surface (peripheral wall surface 11) of the box (corrugated box 101), so the closing strength is improved. Thereby, a lid closing structure that can facilitate the user of the box can be provided.

[0081] <Application Example of the Second Embodiment> FIG. 9 is a partial development view of a cardboard box showing an application example of the second embodiment of the present invention. In the application example of the second embodiment, parts similar to those of the first embodiment shown in FIGS. 8 and 9 are not described.

[0082] In FIG. 9, in the cardboard box of the application example of the second embodiment of the present invention, left and right eaves 171L and 171R are formed at two positions between the folding lines 164 of the lid-forming flap 161.

[0083] The eaves 171L and 171R are formed so as to extend from the lid surface 162 by cuts.

[0084] When the insertion piece 163 of the lid-forming flap 161 is inserted inside the opening 2 (see FIG. 7(a)), the eaves 171L and 171R are locked to the edge of the opening 2, and the position of the band portion 167 of the lid-forming flap 161 and the position of the insertion piece 15 of the peripheral wall surface 11 (see FIG. 7(a)) are accurately aligned.

[0085] According to such an application example of the second embodiment, it has the same effects as the second embodiment shown in FIGS. 7 and 8, and when the insertion piece 163 of the lid-forming flap 161 is inserted inside the opening 2, the position of the band portion 167 of the lid-forming flap 161 and the position of the insertion piece 15 of the peripheral wall surface 11 can be easily and accurately aligned.

[0086] In addition, the structure, connection of each member, chemical substances, etc. of the present invention can be variously changed without changing the gist of the present invention.

[0087] For example, as the material for forming the box, materials other than cardboard, such as paper other than cardboard, plastic, FRP, wood, etc. can be freely selected. As the shape of the box, shapes other than a rectangular box, such as a round box, a triangular box, etc. can be variously applied.

[0088] For example, it is possible to combine two or more members into one, or conversely, to configure and connect one member from two or more other members.

[0089] In addition, the above-described embodiments and their application examples are merely the four best or nearly best forms at present.

Description of Reference Numerals

[0090] Single-layer cardboard box Two openings Bottom surface Index finger Peripheral wall surfaces 11 to 14 Insertion piece Connection part Wing part Wing part 17a Wing part 17b Wing part 17c Flap Flap Cover-forming flap Cover surface Insertion piece Folding line Trapezoidal hole Hole 25a Hole 25b Hole 25c Single-layer cardboard box Cover-forming flap Cover surface Insertion piece Folding line Trapezoidal hole Eaves 71L, 71M, 71R Single-layer cardboard box Cover-forming flap Cover surface Insertion piece Folding line Cuts 125, 126 Band part Band part 127a Band part 127b Cut 129L and 129R openings 161 cover forming flap 162 cover surface 163 insertion piece 164 folding line 167 band part 171L and 171R eaves

Claims

1. In a box in which a plate-shaped part surrounding a space forms a box-shaped peripheral surface, an opening is formed inside one side of the peripheral surface, and a flap is extended to a part of one side of the peripheral surface to form a lid-forming flap, the lid-forming flap has a lid surface for closing the opening and an insertion piece that is inserted inside the opening when the lid surface closes the opening, a hole or a notch is formed in the insertion piece, an insertion piece formed by a notch is formed on the peripheral surface, When closing the lid-forming flap, the lid-forming flap is inserted inside the opening, and the insertion piece is folded toward the inside of the box, so that the insertion piece is inserted into the hole or the notch of the insertion piece and meshes, and the lid-forming flap is fixed to the peripheral surface. A lid closing structure characterized by this.

2. In a box in which a plate-shaped part surrounding a space forms a box-shaped peripheral surface, an opening is formed inside one side of the peripheral surface, and a flap is extended to a part of one side of the peripheral surface to form a lid-forming flap, the lid-forming flap has a lid surface for closing the opening and an insertion piece that is inserted inside the opening when the lid surface closes the opening, a band part formed by two notches crossing a bending line between the lid surface and the insertion piece is formed in the lid-forming flap, the peripheral surface has an insertion piece formed by a notch at a position in contact with or near the band part when the insertion piece is inserted into the opening, When closing the lid-forming flap, the lid-forming flap is inserted inside the opening, and the insertion piece is folded toward the inside of the box, so that the band part bends toward the inside of the box, and both sides of the insertion piece are inserted into the openings formed on both sides of the band part and mesh, and the lid-forming flap is fixed to the peripheral surface. A lid closing structure characterized by this.

3. The lid closing structure according to claim 1 or 2, wherein the insertion piece is formed of a connection part on the proximal end side connected to the peripheral surface of the box and a wing part having a portion larger than the connection part.

Images