JP4259908B2 - Cardboard box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cardboard box, and more particularly to a cardboard box having a configuration for maintaining a folded state of a flap.
[0002]
[Prior art]
Conventionally, after storing things such as vegetables in a cardboard box, four flaps (folding lids) extending from the upper edge of the side are folded and fixed with adhesive tape, staples, etc. to form a lid Has been done. And in recent years, in order to simplify those operations, the flaps are folded by the engagement of the locking pieces and the locking holes provided in the flaps without using the fixing means such as the adhesive tape described above. Cardboard boxes that can be kept in a state may be used. An example is shown below.
[0003]
As shown in FIG. 6, the corrugated cardboard box 101 has a long side surface 102a having a rectangular shape, a short side surface 102b having a shorter width than the long side surface 102a, a bottom surface 103 connected to the lower edges of the long side surface 102a and the short side surface 102b, and a long side surface 102a. It is mainly composed of a long flap 104a extending from the upper edge and a short flap 104b extending from the upper edge of the short side face 102b. Here, except for the bottom surface 103, the long flaps 104a and the like are formed in pairs. Further, the corner of the long flap 104a is notched, and a locking piece 105 is formed at the notched end. Here, the locking piece 105 is formed so as to be foldable by a fold line portion 105a formed of a fold line parallel to the upper edge of the long side surface 102a, and is formed wider than the neck portion 105c extending from the fold line portion 105a and the neck portion 105c. The hook portion 105b has a substantially rectangular shape. On the other hand, the short flap 104b is provided with a locking hole 106 that can be engaged with the locking piece 105 and narrower than the hooking portion 105b.
[0004]
Then, after folding the long flap 104a from above the short flap 104b, the locking piece 105 is folded along the folding line portion 105 and inserted into the locking hole 106 of the short flap 104b (arrow A in FIG. 6). At this time, the locking hole 106 is formed narrower than the hooking portion 105b, and the hooking portion 105b contacts the hole edge of the locking hole 106, and insertion is restricted. However, since the locking piece 105 is formed of a foldable corrugated cardboard material, the hooking portion 105 b is bent upward in a dogleg shape and inserted into the locking hole 106. Thereafter, the hooking portion 105b is restored to the state before insertion almost from the shape of the figure by the restoring force of the cardboard material. Thereby, the latching piece 105 and the latching hole 106 engage, and the movement which the latching piece 105 tries to restore | restore upwards about the broken line part 105a is suppressed. Therefore, the long flap 104a is restricted from returning to its original state (the lid is opened), and the folded state of the long flap 104a and the short flap 104b is maintained. As a result, a state in which the lid of the cardboard box 101 is closed is created, and the vegetables stored in the cardboard box 101 are protected from being exposed directly to the outside air or coming into contact with external objects and being damaged.
[0005]
The above prior art is publicly implemented, and the applicant has not found a document describing the prior art at the time of filing this application.
[0006]
[Problems to be solved by the invention]
Here, the locking piece 105 in the engaged state with the locking hole 106 is formed at each cut end of the long flap 104a, and further bent according to a fold line portion 105c formed in parallel with the upper edge of the long side surface 102a. Therefore, the locking piece 105 folded into the box of the cardboard box 101 is located near the center in the short width direction of the cardboard box 101 and protrudes into the box from above. Therefore, when storing crops such as radishes, the protruding locking pieces 105 may come into contact with the crops and the like, and there is a problem that the space in the box cannot be used effectively.
[0007]
Further, since the locking piece 105 is provided by cutting off the corner of the long flap 104a, the cut end of the long flap 104a is formed on the upper surface of the cardboard box 101 (the surface formed by folding the long flap 104a and the short flap 104b). A step corresponding to the thickness of the cardboard is formed. Therefore, for example, when another cardboard box 101 is stacked by sliding in the longitudinal direction of the cardboard box 101 (the direction of arrow B in FIG. 6), the step is caught with the bottom surface 103 of the other cardboard box 101, and workability is improved. There were problems such as worsening.
[0008]
In view of the above circumstances, an object of the present invention is to provide a cardboard box that can keep the folded state of the flap and can effectively use the space in the box of the cardboard box.
[0009]
[Means for Solving the Problems]
The cardboard box according to the present invention includes a first flap having a locking piece extending from an upper edge of a pair of opposing first side surfaces and formed by cutting a part thereof, and connected to the first side surface. A second flap that extends from the upper edge of the pair of second side surfaces and has a locking hole that can be engaged with the locking piece when the first flap is folded from above. And a first cardboard box for holding the first flap and the second flap in a folded state by the engagement of the locking piece and the locking hole, wherein the locking piece is a flap of the first flap. A fold line portion that is close to the short side and formed parallel to the flap short side, a neck portion having one end connected to the fold line portion, and the other end of the neck portion, and wider than the neck width of the neck portion And a hook portion formed as described above, and the features for solving the above-mentioned problems That.
[0010]
Here, the cardboard box has four side surfaces, a lid is formed by folding four flaps extending from the upper edge of each side surface, and is assembled into a rectangular parallelepiped casing (ie, , Each side and the flap has a rectangular shape). And the flap short side of the first flap corresponds to a side perpendicular to the upper edge of the first side surface. Further, in the vicinity of the upper edge of the second side surface, an elongated hole is often formed for carrying the cardboard box with the operator inserting a finger and the first side surface facing the operator.
[0011]
Therefore, according to the corrugated cardboard box of the present invention, the locking piece is bent in accordance with the fold line portion formed close to the flap short side and parallel to the flap short side. Then, by engaging the locking piece and the locking hole, the folded state of the first flap and the second flap is maintained. At this time, the hooking portion of the locking piece protruding into the space in the box of the cardboard box is close to the second side surface, and the surface of the hooking portion and the second side face each other. That is, since the locking piece protrudes in the vicinity of the inner peripheral edge of the box, it is less likely to come into contact with the stored item when storing the stored item such as a radish, and the space in the box can be used effectively. Become.
[0012]
In addition, with the first side faced to the operator, by folding the locking piece toward the second side, the operator inserted a finger into the long hole formed on the second side, In other words, it is possible to insert the locking piece into the locking hole using the thumb while keeping the transported state. Therefore, for example, a series of operations of storing the contents in a cardboard box, closing the lid (folding and fixing the first flap and the second flap), and stacking them without changing the orientation of the hand, It can be carried out smoothly.
[0013]
The cardboard box is described as follows: “The neck portion is formed in a substantially trapezoidal shape with a reduced width from the folding line portion toward the hook portion, and the locking hole is formed to have substantially the same shape as the locking piece. It's good.
[0014]
Thereby, since the latching piece and the latching hole have substantially the same shape, when the latching piece is inserted into the latching hole, there is little catch and it can be easily inserted. Therefore, the locking piece is less likely to be bent, and when the first flap and the second flap corresponding to the lid of the cardboard box are repeatedly opened and closed, the wear of the locking piece is reduced and the cardboard box is Can be used repeatedly across.
[0015]
Furthermore, since the neck portion of the locking piece is formed with a reduced width from the fold line portion toward the hooking portion, it is easy to insert when the locking piece is inserted, and the locking hole is substantially the same as the locking piece. Since it is formed in a shape and a part thereof is formed with a reduced width, the movement of the locking piece to be restored upward is suppressed by the reduced width portion, and the locking piece is further difficult to come off.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a corrugated cardboard box 1 according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5. Here, FIG. 1 is a development view showing the configuration of the cardboard box 1 according to the present embodiment, FIG. 2 is a perspective view showing the configuration of the cardboard box 1, and FIG. 3 is an enlarged view showing the configuration of the flap fixing mechanism 12. FIG. 4 is an enlarged plan view showing the configuration of the flap fixing mechanism 12, and FIG. 5 is an enlarged cross-sectional view showing the configuration of the flap fixing mechanism 12. Here, FIG. 3 and FIG. 4 show a state in which the locking piece 7 is locked at a slight inclination.
[0017]
As shown in FIG. 1 to FIG. 5, the corrugated cardboard box 1 includes a pair of long side surfaces 2a having a rectangular shape, a pair of short side surfaces 2b having a shorter width than the long side surfaces 2a, and upper sides of the side surfaces 2a and 2b. Long flap 3a and short flap 3b extending from edges 10 and 11, bottom flaps 4a, 4b and 4c extending from lower edges 13 and 14 of respective side surfaces 2a and 2b, long side surface 2a and short side surface In order to connect 2b, it is mainly comprised from the connection piece 5 provided in one long side 2a, and is assembled | attached to a housing | casing from the cardboard D of 1 sheet. In addition, the length of the flap short side 3c of the long flap 3a is formed in substantially half of the upper edge 11 of the short side surface 2b, and when assembled to the housing, no gap is formed on the upper surface. Here, the long side surface 2a corresponds to the first side surface in the present invention, the short side surface 2b corresponds to the second side surface, the long flap 3a corresponds to the first flap in the present invention, and the short flap 3b corresponds to the second flap.
[0018]
Further, in the vicinity of the upper edge 11 of the short side surface 2b, a long hole 6 having a size into which an operator's fingers can be inserted is formed in order to improve workability during transportation. The long flap 3a is provided with a locking piece 7 by cutting a part thereof. Here, the locking piece 7 is connected to a fold line portion 7a composed of a fold line provided in parallel and close to the flap short side 3c, a neck portion 7c having one end connected to the fold line portion 7a, and the other end of the neck portion 7c. And a hook portion 7b formed to be wider than the width of the neck portion 7c. And the neck part 7c is reduced in width toward the hook part 7b from the broken line part 7a, and is exhibiting trapezoid shape. Here, the height of the trapezoid (corresponding to the vertical distance from the folding line portion 7a to the hooking portion 7b) corresponds to the thickness of two cardboards D. The short flap 3b is formed with a locking hole 8 having substantially the same shape as the locking piece 7 at a position where the locking piece 7 can be inserted when the long flap 3a is folded from above. . That is, the locking hole 8 is arranged in a state rotated 90 degrees with respect to the locking piece 7 in the unfolded state (see FIG. 1). In the present embodiment, the locking piece 7 and the locking hole 8 that are engaged with each other and hold the folded state of the long flap 3a and the short flap 3b are referred to as a flap fixing mechanism 12.
[0019]
Next, a method for assembling the cardboard box 1 will be described. First, after corrugating the cardboard D according to the fold line 9 (two-dot chain line in FIG. 1), an adhesive is applied to the connecting piece 5 and adhered to the short side surface 2b. Thereby, the long side surface 2a and the short side surface 2b of the both ends which are not adjacent in the expand | deployed state are connected via the connection piece 5, and a cylindrical body is formed by the four side surfaces 2a and 2b. Then, the bottom flaps 4a, 4b, 4c are directed upward, the two bottom flaps 4b are folded from above the bottom flap 4a, and the insertion portion of the bottom flap 4c is inserted below the bottom flap 4a. Thus, the opened housing is assembled.
[0020]
Then, an accommodation (for example, a crop such as radish) is accommodated in a space (hereinafter referred to as a space in a box) formed by being surrounded by the long side surface 2a, the short side surface 2b, and the bottom surfaces 4a, 4b, 4c. After that, the short flap 3b is folded according to the fold line 9, and the long flap 3a is further folded and stacked from above. Thereafter, by pushing the locking piece 7 into the locking hole 8 from above, the locking piece 7 is bent into the box according to the fold line portion 7 a and inserted into the locking hole 8. At this time, since the locking hole 8 is formed in substantially the same shape as the locking piece 7, the locking piece 7 bends while the peripheral edge of the locking piece 7 and the hole edge of the locking hole 8 rub against each other. Without being inserted into the locking hole 8 easily. And since the neck part 7c is formed in the height equivalent to the thickness for the two cardboards D, the hook part 7b is located under the short flap 3b (refer FIG. 5).
[0021]
Here, the locking piece 7 tends to be restored upward with the broken line portion 7a as an axis by the restoring force of the cardboard D. However, in a state where the locking piece 7 is inserted into the box (FIGS. 3 to 5), the hooking portion 7b protrudes in the width direction (corresponding to the horizontal direction in FIG. 5) from the locking hole 8, When the protruding portion of the portion 7b contacts the lower surface of the short flap 3b, the locking piece 7 and the locking hole 8 are engaged, and the movement of the locking piece 7 to be restored is suppressed. Further, a part of the neck portion 7c comes into contact with the reduced width portion of the locking hole 8, and the movement of the locking piece 7 is suppressed by friction. Thereby, the long flap 3a is restricted from returning to its original state (the lid is opened), and the folded state of the long flap 3a and the short flap 3b is maintained.
[0022]
In addition, since the fold line portion 7a is formed in parallel near the flap short side 3a, when the locking piece 7 is engaged with the locking hole 8, the hooking portion 7b is close to the short side surface 2b, The surface of the hook portion 7b and the short side surface 2b are opposed to each other. Therefore, when the lid of the cardboard box 1 (corresponding to the long flap 3a and the short flap 3b) is fixed, the four locking pieces 7 protrude in the vicinity of the peripheral edge in the box, so that they hit the vegetables stored in the box. This makes it possible to effectively use the space in the box.
[0023]
Next, a method for using the cardboard box 1 will be described. As described above, a container such as a radish is accommodated in a corrugated cardboard box 1 assembled in an open housing, folded in the order of the short flap 3b and the long flap 3a, and the locking piece 7 is locked into the locking hole. Push into 8. Here, since the cardboard box 1 has the long hole 6 on the short side surface 2b, an operator (not shown) points his / her finger (other than the thumb) to the long hole 6 with the long side surface 2a facing the worker. Insert and hold the cardboard box 1 for transport. And since the broken line part 7a of the latching piece 7 is adjoining to the flap short side 3c, and the long hole 6 is formed in the vicinity, the operator has inserted the finger into the long hole 6 (state of carrying). Thus, it is possible to push in all the locking pieces 7 with the thumb without changing the direction of the hand or releasing the hand from the long hole 6. Accordingly, it is possible to smoothly proceed a series of operations of fixing the lid (corresponding to the long flap 3a and the short flap 3b) of the corrugated cardboard box 1 and subsequently carrying it, thereby improving workability.
[0024]
Further, when stacking a plurality of cardboard boxes 1 up and down, as described above, the cardboard box 1 is held in a direction in which the long side surface 2a faces the operator, and the longitudinal direction of the cardboard box 1 (the direction of arrow C in FIG. 2). ) Are often stacked while sliding. Here, the long flap 3a has a rectangular shape, and the locking piece 7 is formed inside the periphery thereof. And when the long flap 3a is folded, the flap short side 3c has overlapped with the upper edge 11 of the short side surface 2b. That is, there are few steps formed on the upper surface of the cardboard box 1, and in particular, there is little catching in the direction in which the cardboard box 1 is slid, so that a plurality of cardboard boxes 1 can be easily stacked. Therefore, for example, it is possible to smoothly carry out a series of operations in which a container such as radish is accommodated in the cardboard box 1, covered (the first flap and the second flap are folded and fixed), and stacked. It becomes.
[0025]
Further, the neck portion 7 c of the locking piece 7 is reduced in width from the folding line portion 7 a toward the hooking portion 7 b, and the locking hole 8 has substantially the same shape as the locking piece 7. Therefore, when the locking piece 7 is inserted into the locking hole 8, there is little catch and it can be easily inserted. Further, since the protruding portion of the hook portion 7b is not inserted by being bent, the hook portion 7b is repeatedly opened and closed when the lid (corresponding to the long flap 3a and the short flap 3b) of the cardboard box 1 is repeatedly opened and closed. The cardboard box 1 can be used repeatedly over a plurality of times.
[0026]
Further, a part of the neck portion 7c is in contact with the reduced width portion of the locking hole 8, and the movement of the locking piece 7 to return upward about the folding line portion 7a by the restoring force is further suppressed. The stop piece 7 is difficult to come off. Therefore, for example, when the cardboard boxes 1 are stacked or transported, even if an impact is applied, the locking piece 7 is difficult to come off, and the lid of the cardboard box 1 is less likely to open and is accommodated in the space inside the box. Containment such as vegetables is protected.
[0027]
The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to these embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention, as described below. Design changes are possible.
[0028]
That is, the neck portion 7c of the locking piece 7 may be formed with a certain width from the fold line portion 7a. Moreover, although the locking hole 8 showed what showed substantially the same shape as the locking piece 7, the rectangular shape, ellipse shape, etc. which were narrowly formed with respect to the hook part 7b may be sufficient. Moreover, when the flap short side 3c of the 1st flap 3a is formed shorter than this embodiment, and it folds and a lid | cover is formed, a clearance gap may be formed in an upper surface. Thereby, the vegetables etc. which were accommodated in the cardboard box 1 can be confirmed.
[0029]
【The invention's effect】
As described above in detail, the corrugated cardboard box according to the present invention has the first flap and the second flap flaps corresponding to the lid of the corrugated cardboard box. It is formed in the vicinity. And since the fold line part is formed parallel to the flap short side, when the locking piece is folded according to the fold line part and inserted into the locking hole, the surface of the hooking part protruding into the space in the box becomes the second side surface. Opposing and in close proximity to the second side. That is, four locking pieces protrude in the vicinity of the peripheral edge in the box. For this reason, it is less likely that the locking piece hits an object accommodated in the space in the box, and the space in the box can be used effectively. Moreover, since the locking piece is formed inside the periphery of the first flap, no step is formed at the end of the top surface of the cardboard box when assembled to the housing. Therefore, when the cardboard boxes are stacked, it is less likely to get caught and the stacking work becomes easy.
[Brief description of the drawings]
FIG. 1 is a development view showing a configuration of a cardboard box according to the present embodiment.
FIG. 2 is a perspective view showing a configuration of a cardboard box according to the present embodiment.
FIG. 3 is an enlarged perspective view showing a configuration of a flap fixing mechanism.
FIG. 4 is an enlarged plan view showing a configuration of a flap fixing mechanism.
FIG. 5 is an enlarged sectional view showing a configuration of a flap fixing mechanism.
FIG. 6 is a perspective view showing a configuration of a conventional cardboard box.
[Explanation of symbols]
1 Cardboard box 2a Long side (first side)
2b Short side (second side)
3c flap short side 3a long flap (first flap)
3b Short flap (second flap)
7 Locking piece 7a Folding line part 7b Hook part 7c Neck part 8 Locking holes 10, 11 Upper edge

Claims (1)

A first flap having a locking piece extending from the upper edge of a pair of opposing first side surfaces and formed by cutting a part thereof;
A locking hole extending from the upper edge of the pair of second side surfaces connected to the first side surface and capable of engaging with the locking piece when the first flap is folded from above is provided. A second flap,
A cardboard box that holds the first flap and the second flap in a folded state by the engagement of the locking piece and the locking hole,
The locking piece is
A fold line portion formed adjacent to the flap short side of the first flap and parallel to the flap short side;
A neck having one end connected to the fold line, and
It is connected to the other end of the neck portion, and includes a hook portion that is formed wider than the neck width of the neck portion ,
The neck portion is formed in a substantially trapezoidal shape that is reduced in width from the fold line portion toward the hook portion,
The cardboard box , wherein the locking hole is formed in a through hole shape having substantially the same shape as the locking piece .

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