JP2018039533A - box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a box which can easily achieve surface smoothness of an outer lid when the outer lid is closed with a simple structure.SOLUTION: A box 1 comprises: a pair of inner lids 30; and a pair of outer lids 40 which cover the inner boxes 30 and form a lid part 12. Each of the outer lids 40 has a pair of fitting parts 44 which are folded at a third fold part 42 parallel to a second fold part 41 and are fitted to a lower side of the inner boxes 30, on a tip end. Each of the pair of inner lids 30 has a pair of division inner lids 30a which are cut in which a range from a center of the first fold part 31 to a center of the tip end part 32 of the inner lid 30 is a symmetrical axis AXs. The pair of division inner lids 30s have: a friction part 33 which is bent to inside and generates friction force mutually to a counter friction part, when the fitting part 44 is fitted, on a side of the first fold part 31; and a positioning part 35 for positioning the fitting part 44 with registration on a side of the tip end part 32, in a symmetrical state along the symmetrical axis AXs.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a box that forms a lid portion with an outer lid that covers an inner lid.

  A cardboard box to which cardboard is applied is known. The cardboard box includes an inner lid formed by extending from the box body and an outer lid that covers the inner lid. Conventional cardboard boxes are devised in various ways against outward warping due to the elasticity of the bent portion of the outer lid (see, for example, Patent Document 1 and Patent Document 2).

The invention disclosed in Patent Document 1 has a form in which an engagement piece of the outer lid is fitted into a slit formed in the inner lid. That is, in the technique of Patent Document 1, a slit is formed on the inner lid, an engagement piece is formed on the outer lid, and the engagement piece is inserted into the slit to ensure the closing lock force of the outer lid.
The invention disclosed in Patent Document 2 has a form in which a sealing member is attached to the outer lid among the inner lid and the outer lid. That is, the technique of Patent Document 2 has a configuration in which the outer lid can be appropriately opened and closed by newly attaching a member other than the main body called a sealing member.

JP 2001-18952 A JP 2013-252887 A

However, the technique described in Patent Document 1 requires a step of forming the slit and the engagement piece and a step of inserting the engagement piece into the slit in order to realize the closing locking force. The complexity of the process accompanying the increase in the manufacturing process. Moreover, in the technique described in Patent Document 2, it is necessary to prepare a sealing member as a separate member in order to lock and fix the outer lid. In addition, a new process for attaching the sealing member is required.
Further, in these conventional techniques, there has been a problem that the flatness of the outer lid cannot be secured when the outer lid is closed. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a box that can easily realize flatness of the outer lid when the outer lid is closed with a simple structure.

  A box according to the present invention is a box having a lid portion located on the top surface of a rectangular parallelepiped, and a pair of first sides facing each other and a pair of second sides facing each other adjacent to the first side. A pair of first side surfaces rising from the pair of first sides and facing each other, and a pair of second side surfaces rising from the pair of second sides and facing each other and adjacent to the first side surfaces, respectively. A pair of inner lids that extend from the pair of first side surfaces, are respectively bent by a first bent portion at the upper end of the first side surface and oppose the bottom surface, and extend from the pair of second side surfaces, respectively. A pair of outer lids that are respectively bent at the second bent portion at the upper end of the second side surface and that cover the inner lid to form the lid portion, and each of the pair of outer lids at the tip, Third fold parallel to the second fold It has a pair of fitting parts that are bent at the bending part and fitted to the lower side of the inner lid, and each of the pair of inner lids extends from the center of the first bent part to the center of the tip part of the inner lid. A pair of divided inner lids cut along the axis of symmetry, and the pair of divided inner lids are symmetrically arranged along the symmetry axis, respectively, when the fitting portion is fitted on the first bent portion side. It has a friction part which is bent inward and generates a frictional force, and a positioning part which aligns and positions the fitting part on the side of the tip part.

With this configuration, the box according to the present invention suppresses the warp due to the elasticity that the outer lid generates at the second bent portion. In other words, since both ends of the fitting portion are pressed and held by the elasticity of the friction portion of the divided inner lid, the warp at the second bent portion is suppressed, and the central region except the both ends of the fitting portion is fitted to the inner lid by the positioning portion. To maintain
The box according to the present invention easily achieves flatness of the lid (outer lid) with a simple structure in which the shapes of the inner lid and the outer lid are slightly changed. Such an effect is particularly effective when the box is formed of corrugated cardboard to form a corrugated cardboard box. That is, it becomes easy to realize flatness when the outer lid is closed without using other members. For this reason, the necessity of sticking a tape etc. to a pair of outer lids and ensuring flatness is controlled.

In the box according to an embodiment of the present invention, the friction portion is separated from the first bent portion by a cutting portion formed symmetrically with respect to the symmetry axis along the first bent portion. It is characterized by that.
In the box according to an embodiment of the present invention, the cutting portion is cut with the same dimension as a positioning width determined by a distance between the pair of positioning portions.
In the box according to an embodiment of the present invention, the positioning width is substantially equal to a thickness when the pair of fitting portions are overlapped with each other and fitted into the positioning portion.
In the box according to an embodiment of the present invention, the friction portion has a friction length of approximately 30 mm in a direction along the second bent portion.
The box according to an embodiment of the present invention is characterized in that the rectangular parallelepiped is formed of cardboard.

  The box according to the present invention easily achieves flatness of the lid (outer lid) with a simple structure in which the shapes of the inner lid and the outer lid are slightly changed. Such an effect is particularly effective when the box is formed of corrugated cardboard to form a corrugated cardboard box. That is, it becomes easy to realize flatness when the outer lid is closed without using other members. For this reason, there exists an effect that the necessity of sticking tape etc. on a pair of outer lids and ensuring flatness is controlled.

It is a perspective view which sees the state before closing the inner cover of the box which concerns on Embodiment 1 of this invention, and closing an outer cover from diagonally upward. It is a top view which shows the state which closed the outer cover of the box shown in FIG. 1 by planar view. FIG. 5 is an enlarged cross-sectional view showing the box shown in FIG. 2 in an enlarged view of the cross-sectional state seen in the direction of arrows F3-F3 and partially omitting it. FIG. 5 is an enlarged cross-sectional view showing the box shown in FIG. 2 in an enlarged view of the cross-sectional state viewed in the direction of arrows F4-F4 and partially omitting it.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The box 1 (corrugated cardboard box 10) according to the present embodiment will be described with reference to FIGS.
FIG. 1 is a perspective view showing a state before the inner lid 30 of the box 1 according to Embodiment 1 of the present invention is closed and the outer lid 40 is closed as viewed obliquely from above.
FIG. 2 is a plan view showing the state in which the outer lid 40 of the box shown in FIG. 1 is closed in plan view.

The box 1 having the lid portion 12 positioned on the top surface of the rectangular parallelepiped 11 has a pair of first sides 21 that face each other and a pair of second sides 22 that are adjacent to each other and face each other. 20, a pair of first side surfaces 23 rising from a pair of first sides 21 and facing each other, and a pair of second side surfaces 24 rising from a pair of second sides 22 and facing each other and adjacent to the first side surfaces 23, respectively. .
The box 1 extends from the pair of first side surfaces 23, is folded at the first folding portion 31 at the upper end of the first side surface 23, and is opposed to the bottom surface 20, and the pair of second side surfaces 24. And a pair of outer lids 40 that are respectively bent at the second bent portion 41 at the upper end of the second side surface 24 and cover the inner lid 30 to form the lid portion 12.

Each of the pair of outer lids 40 has a pair of fitting portions 44 that are bent at a distal end of a third bent portion 42 parallel to the second bent portion 41 and fitted to the lower side of the inner lid 30. Each of the lids 30 has a pair of divided inner lids 30s that are cut from the center of the first bent portion 31 to the center of the tip end portion 32 of the inner lid 30 as a symmetry axis AXs.
The pair of divided inner lids 30s are symmetric along the axis of symmetry AXs, respectively, on the first bent portion 31 side, and when the fitting portion 44 is fitted, the friction portion 33 is bent inward to generate a frictional force, and A positioning portion 35 for positioning the fitting portion 44 in a consistent manner is provided on the distal end portion 32 side.

In the box 1, the pair of fitting portions 44 are overlapped and integrated, the fitting portions 44 in the integrated state are aligned with the pair of friction portions 33, and the friction portion 33 is pushed inward by an external force. When 40 is closed, the friction portion 33 is bent toward the bottom surface 20.
Note that the pair of fitting portions 44 may be individually pushed into the friction portion 33. It is preferable to push in a form (one side or one pair at a time) that can be pushed smoothly according to the state of the material such as cardboard.
Since the bent friction part 33 has a property of warping toward the outer lid 40 due to elasticity, a frictional force acts between the fitting part 44 and the fitting part 44. Therefore, the fitting portion 44 fitted to the bottom surface 20 side with respect to the divided inner lid 30 s maintains the state fixed by the friction portion 33.
Further, the fitting portion 44 in a range facing the positioning portion 35 is fitted into the positioning portion 35 as it is. Therefore, the fitting part 44 fitted in the positioning part 35 maintains the state where both sides are held by the frictional force generated in the friction part 33 where the fitting part 44 is bent by an external force.
The box 1 suppresses the warp due to elasticity that the outer lid 40 generates at the second bent portion 41. That is, since both ends of the fitting portion 44 are pressed and held by the elasticity of the friction portion 33 included in the divided inner lid 30 s, warpage in the second bent portion 41 is suppressed, and the center portion excluding both ends of the fitting portion 44 is excluded by the positioning portion 35. The state where the region is fitted in the inner lid 30 is maintained.
Therefore, the box 1 can easily realize the flatness of the lid portion 12 (the outer lid 40) with a simple structure in which the shapes of the inner lid 30 and the outer lid 40 are slightly changed. Such an effect is particularly effective when the box 1 is formed of corrugated cardboard to form a corrugated cardboard box 10. That is, the outer lid 40 can easily achieve flatness when closed without using other members. For this reason, there exists an effect that the necessity of sticking a tape etc. on a pair of outer lids 40 and ensuring flatness is controlled.

The 1st bending part 31, the 2nd bending part 41, and the 3rd bending part 42 are formed in the linear form by bending the base material (for example, cardboard) at the time of making the box 1. As shown in FIG.
In particular, when the box 1 is formed of cardboard, the first bent portion 31 forming the inner lid 30 is pressed by the outer lid 40, so that a substantially flat shape can be secured. On the other hand, since the 2nd bending part 41 which forms the outer cover 40 is arrange | positioned relatively outside the inner cover 30, it tries to return to the bending force added to the 2nd bending part 41 from the outside. Elasticity works and cannot bend enough.
In a state where the inner lid 30 is not the divided inner lid 30s, the outer lid 40 is in a form that is not easily closed even if it is intended to be closed. In other words, even if it is pressurized and closed once, it returns to its original lifted state due to elastic force, and it is difficult to maintain the closed state, that is, flatness. In the present embodiment, the frictional portion 33 and the positioning portion 35 are allowed to coexist in the divided inner lid 30s, so that a holding force for the fitting portion 44 is applied.
In other words, the fitting portion 44 (outer lid 40) once fitted inside the pair of divided inner lids 30 s by the external force is fixed by the frictional force acting between the friction portions 33, and the fitting portion 44 is further subjected to friction. The portion that does not interfere with the portion 33 is positioned by the positioning portion 35 so as to have flatness, and the elastic force that returns to the outside hardly acts.
The distance from the second bent portion 41 to the third bent portion 42 in the outer lid 40 and the distance from the first bent portion 31 to the distal end portion 32 in the inner lid 30 are cylindrical (for example, generally adopted). In the process of making the cardboard box 10 as a corrugated mandarin orange box), they usually coincide with each other.

The friction part 33 is separated from the first bent part 31 by a cutting part 34 formed symmetrically with respect to the symmetry axis AXs along the first bent part 31.
Since the friction part 33 is separated from the first bending part 31 by the cutting part 34, when it is pushed by the fitting part 44, the friction part 33 is easily bent inward away from the symmetry axis AXs. That is, since the bent friction part 33 faces the fitting part 44 at the surfaces, it becomes easy to sufficiently secure the mutual frictional force, and the outer lid 40 easily secures sufficient flatness.
The friction portion 33 is bent further inward than the inner lid 30 by the fitting portion 44. At this time, if the friction part 33 remains integral with the first bent part 31, the friction part 33 in a state connected to the first bent part 31 is difficult to bend. Therefore, the cutting part 34 makes it easy for the friction part 33 to be bent along the insertion of the fitting part 44.
The friction part 33 preferably has a friction length Lf of approximately 30 mm in the direction along the second bent part 41. Since the friction portion 33 has a length of about 30 mm (friction length Lf), when the pair of fitting portions 44 are fitted into the pair of positioning portions 35, sufficient machinery is provided in cooperation with the fitting at the positioning portions 35. Strength can be secured.
Although the description has been given assuming that the friction length Lf is about 30 mm, the friction length Lf is appropriately changed depending on the size of the box 1 and may be about 40 mm, for example.

The position state when the cut portion 34 is formed along the first bent portion 31 may be a position where the friction portion 33 is bent inwardly away from the first side surface 23, and overlapped with the first bent portion 31. It may be formed.
It is preferable that the cutting part 34 is cut | disconnected by the same dimension as the positioning width Ws defined by the space | interval between a pair of positioning parts 35. FIG. That is, the length of the cut portion 34 cut along the first bent portion 31 is preferably symmetric with respect to the symmetry axis AXs, and thus has the same dimension as the positioning width Ws.
Therefore, when the fitting part 44 is pushed in, the two friction parts 33 are easy to bend symmetrically. For this reason, the fitting part 44 is correctly fitted. Since the position of the cutting part 34 is defined by the same dimension as the positioning width Ws, the position of the cutting part 34 is defined by a position that intersects the first bent part 31 with the positioning part 35 extended. With this configuration, the friction portion 33 is bent so as to reliably generate a friction force with respect to the fitting portion 44.

The friction part 33 has a fold line 33f on the extended line of the edge of the positioning part 35 parallel to the symmetry axis AXs. That is, the crease 33f is formed in advance at the position where the friction portion 33 is bent by the fitting portion 44 (on the extended line of the positioning portion 35). Specifically, the fold line 33f is easily formed using a ruled line blade (blade for forming the fold line 33f) on the back side of the friction part 33 (the side facing the bottom surface 20 and the friction part 33 is a valley fold). It is formed with high accuracy.
Thereby, since the fitting part 44 bends the friction part 33 toward the bottom face, it is easy to ensure the friction force acting between the friction part 33 and the fitting part 44.
The fold line 33f is easily positioned by making the length of the cutting portion 34 the same as the positioning width Ws. That is, when the cutting part 34 is cut in a direction parallel to the positioning width Ws, the fold line 33f is aligned with a position where the friction part 33 is valley-folded on the extension line of the positioning part 35. It can be bent while maintaining the friction.
It is preferable that the pair of divided inner lids 30s be reliably separated from each other in the direction along the second bent portion 41 (centering on the symmetry axis AXs). It is necessary for the pair of friction portions 33 to have a frictional force acting reliably by the interaction with the fitting portion 44.
Therefore, it is preferable that the two friction portions 33 facing each other be arranged symmetrically with each other in such a manner that the gap between them is not as wide as possible. The gap between the friction portions 33 on both sides of the symmetry axis AXs is determined by the thickness of the blade used when the friction portion 33 is formed by cutting the material (corrugated cardboard). For this reason, the blade applied when forming the adjacent friction part 33 should just be the thickness which the friction part 33 is only isolate | separated from each other.

  The length of the fitting portion 44 (the fitting length Lt) in the direction intersecting with the third bent portion 42 is preferably about 30 mm. The strength in the direction along the third bent portion 42 of the outer lid 40 can be secured, and the strength when fitted into the divided inner lid 30s (positioning portion 35) can be secured. Moreover, it becomes easy to ensure the volume inside the inner cover 30 compared with the case where it is larger than 30 mm.

The rectangular parallelepiped 11 is preferably formed of cardboard. That is, the box 1 is a cardboard box 10 in which the outer lid 40 formed of corrugated cardboard suppresses the outward force of the outer lid 40 by the inner lid 30.
Although the corrugated cardboard box 10 is illustrated, the present invention is similarly applied to paper and plastic.

FIG. 3 is an enlarged cross-sectional view showing the box 1 shown in FIG. 2 in an enlarged cross-sectional view when viewed in the direction of arrows F3-F3 and partially omitting it.
FIG. 4 is an enlarged cross-sectional view showing the box 1 shown in FIG. 2 in an enlarged cross-sectional view when viewed in the direction of arrows F4-F4 and partially omitting it.

The positioning width Ws is substantially equal to the thickness Ts when the pair of fitting portions 44 overlap each other and are fitted into the positioning portion 35. Since the positioning width Ws is substantially equal to the thickness Ts when the pair of fitting portions 44 are overlapped, it is easy to reliably realize the fitting and positioning of the fitting portions 44. The fitting portion 44 is formed by extending the end portion of the outer lid 40 as it is.
Since the positioning width Ws and the thickness Ts of the two fitting portions 44 that are overlapped are substantially equal to each other, friction is generated so as to slide on each other. That is, since the end surface of the divided inner lid 30s and the plane of the fitting portion 44 have a sliding relationship, it is easy to position accurately. Therefore, the positioning width Ws facilitates accurate positioning with respect to the fitting portion 44.
The positioning width Ws (the width between the pair of positioning portions 35) is different from the friction portion 33 in which a frictional force is applied to the fitting portion 44, and the fitting portion 44 has a thickness Ts (facing to each other). The two stacked sheets are formed to have substantially the same dimensions as the thickness of the pair of fitting portions 44. That is, the positioning width Ws has a dimension substantially equal to the thickness Ts of the two fitting portions 44 and is easily positioned accurately.
For example, when the thickness Ts is 10 mm, the positioning width Ws is substantially the same if the positioning width Ws is about 8 mm to 12 mm.
Thereby, the fitting part 44 is pinched | interposed between a pair of division | segmentation inner lid | covers 30s, and it positions in the state by which the clearance gap was suppressed. The positioning part 35 suppresses the action | operation with respect to the division | segmentation inner lid | cover 30s accompanying the opening / closing of the division | segmentation inner lid | cover 30s of the fitting part 44, ie, the outer lid | cover 40.
That is, it becomes easy to open and close from the outside with respect to the outer lid 40 that is closed flat, and handling becomes easy. Moreover, since the positioning part 35 which the division | segmentation inner cover 30s has becomes flat, the flatness of the outer cover 40 can be maintained.
In the present embodiment, the width between the pair of opposing positioning portions 35 and the symmetry axis AXs is totaled to obtain the positioning width Ws. That is, each of the divided inner lids 30s has a width substantially the same as the plate thickness (Ts / 2) of the fitting portion 44 and a half of the positioning width Ws (Ws / 2) is removed, and the entire centered on the symmetry axis AXs A positioning width Ws having the same dimension as the thickness Ts of the two fitting portions 44 is formed. The formation of the positioning width Ws in the manufacturing process is performed all at once on a region corresponding to the divided inner lid 30s before the inner lid 30 is divided and formed.
The box 1 (corrugated cardboard box 10) according to the present embodiment is a creation of a new and useful technical idea for the shape, but can be produced in almost the same manufacturing process as a conventional manufacturing process (production method).
In addition, the shape which extends the positioning part 35 to the position of the friction part 33 and closes the outer cover 40 without arrange | positioning the friction part 33 is also considered. However, in consideration of ease of use, such as ensuring that the outer lid 40 is in a closed state, maintaining the closed state reliably, and conversely opening easily as required, the positioning of the positioning unit 35 alone In setting, it is difficult to obtain the effects of the present invention (the flatness of the lid and also the ease of opening and closing), and it has been recognized that the effects and effects of the combined use of the friction part 33 and the positioning part 35 are extremely large. .
A shape in which the positioning portion 35 is replaced with the friction portion 33 is also conceivable. However, in this case, it has been recognized that a new difficulty arises in opening and closing the outer lid 40, and that the action and effect of the combined use of the friction part 33 and the positioning part 35 are extremely large.

  The present invention can be effectively used for boxes using cardboard.

1 box 10 cardboard box 11 rectangular parallelepiped 12 lid 20 bottom surface 21 first side 22 second side 23 first side 24 second side 30 inner lid 30s divided inner lid 31 first bent part 32 tip part 33 friction part 33f fold line 34 cutting Part 35 positioning part 40 outer lid 41 second bent part 42 third bent part 44 fitting part AXs symmetry axis Lf friction length Lt fitting length Ts thickness Ws positioning width

Claims (6)

A box having a lid located on the top of a rectangular parallelepiped,
A bottom surface having a pair of first sides opposed to each other and a pair of second sides adjacent to each other adjacent to the first sides;
A pair of first side surfaces rising from the pair of first sides and facing each other;
A pair of second side surfaces rising from a pair of the second sides and facing each other and adjacent to each of the first side surfaces;
A pair of inner lids extending from the pair of first side surfaces, respectively bent at a first bent portion at the upper end of the first side surface and facing the bottom surface;
A pair of outer lids extending from the pair of second side surfaces, respectively bent at the second bent portion at the upper end of the second side surface, covering the inner lid and forming the lid portion,
Each of the pair of outer lids has a pair of fitting portions that are bent at a distal end at a third bent portion parallel to the second bent portion and are fitted to the lower side of the inner lid,
Each of the pair of inner lids has a pair of divided inner lids that are cut from the center of the first bent portion to the center of the tip portion of the inner lid as a symmetry axis,
The pair of divided inner lids are symmetrically along the axis of symmetry, and on the first bent portion side, the friction portions are bent inward when the fitting portions are fitted, and generate frictional forces with each other, and A box having a positioning portion for consistently positioning the fitting portion on the tip portion side. A box according to claim 1,
The box, wherein the friction part is separated from the first bent part by a cutting part formed symmetrically with respect to the symmetry axis along the first bent part. The box according to claim 2,
The box, wherein the cutting portion is cut with the same dimension as a positioning width determined by a distance between the pair of positioning portions. A box according to claim 3,
The said positioning width is substantially equal to the thickness when a pair of said fitting part is mutually piled up, and is fitted in the said positioning part. The box characterized by the above-mentioned. A box according to any one of claims 1 to 4,
The friction part has a friction length of approximately 30 mm in a direction along the second bent part. A box according to any one of claims 1 to 5,
The rectangular parallelepiped is formed of cardboard.

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