JP2001328623A - Paper box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper box having a locking piece which can prevent the increase in the usage of paper by the locking piece and the breakage of the locking piece. SOLUTION: The locking piece 30 for keeping a lid body E in a closed condition is provided on an upper part of a forward corner in a side plate 23 of a box body D under a condition that the locking piece is not protruded outside the external contour of the box body D in a blank condition before the assembly, and the locking piece 30 is locked to a stepped portion 31 of the lid body E.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrap film for packaging foods and the like (including a synthetic resin film, aluminum wheels, cooking paper, etc.) and a paper box for storing solid soap and the like. is there.

[0002]

2. Description of the Related Art A conventional technique will be described by taking a wrap film box as a preferred example of the present invention as an example.

[0003] The wrap film box is, as shown in FIG.
A box body A having an upper surface opened by a bottom plate 1, a front plate 2, left and right side plates 3, 3 and a back plate 4, and a lid B that opens and closes an upper opening of the box body is formed into an elongated rectangular parallelepiped. A wrap film F wound in a roll shape is accommodated therein.

[0004] The lid B has a top surface portion 5 and a box body side plate 3,
A cutting blade 8 configured to cut a wrap film F drawn from the box body A is formed in a box shape including left and right side portions 6 and 6 covering the body 3 and a front portion 7 covering the body front plate 2. 7 is provided at the lower end.

FIG. 8 shows an unfolded state of the box, that is, a blank C as a cardboard material which is bent to form a box.

The bottom plate 1, the front plate 2, and the back plate 4 of the box body A
Folds 3a, 3b, 3c are protrudingly provided at both left and right ends, respectively, and are folded and bonded inside and outside at the time of assembling the box to form left and right side plates 3, 3.

[0007] Similarly, folding pieces 6a and 6b are protrudingly provided on both the right and left ends of the top surface portion 5 and the front surface portion 7 of the lid B, and these are folded and adhered so that the left and right side surface portions 6 and 6 are joined.
6 are formed.

In FIGS. 7 and 8, reference numeral 9 denotes a projection preventing piece which is provided inwardly at the opening edge of the box body front plate 2 to prevent the wrap film F from jumping out. Also, in FIG.
X are folds for folding the box body A and the lid B from the blank C to assemble them.

Such a box is known in which a sealing structure for holding the lid B in a closed state is provided so that the accommodated wrap film F does not jump out of the box or a foreign substance enters the inside. (For example, Japanese Patent Laid-Open No.
434).

In this known sealing structure, as shown in the figure, an opening stop piece 10 is provided at an opening edge portion of the main body side plates 3 and 3 so as to protrude outward, while a side portion 6 of a lid B is provided.
A step 11 is provided inside 6, and the lid B is held in a closed state by locking the opening stopper piece 10 to the step 11 with the cover B closed.

Here, the opening stopper piece 10 is connected to the folded piece 3a connected to the main body bottom plate 1 via a fold Y at the stage of producing the blank C in FIG. Is bent outward as shown in FIG.

[0012]

However, according to this known sealing structure, the opening stopper 10 protrudes from the outer contour (basic outer contour) necessary for forming the box body A on both sides in the longitudinal direction. As shown by a two-dot chain line in FIG. 8, the entire length of the base paper for cutting out the blank C by the length m of the opening stopper piece 10 is enlarged on both sides and its area, that is, the use of paper The amount was increasing and the cost was high.

Further, the opening stopper pieces 10, 10 are blank C
Because of being located on the outermost side in the longitudinal direction of the blank C, there is a high possibility that the opening stopper pieces 10, 10 come into contact with or collide with other objects and be damaged when the blank C is stored or transported.

Accordingly, the present invention is to provide a paper box which is free from an increase in the amount of used paper and breakage of the opening stopper piece while providing the opening stopper piece.

[0015]

According to a first aspect of the present invention, one blank is bent to assemble a box body having an opening and a lid for opening and closing the opening. In a paper box formed in a box shape having a side portion covered by a side plate of the box body and a front portion covered by the front plate of the body, an opening protruding outward in the assembled state on the side plate of the box body. A stop piece is provided at a position not protruding outside the outer contour of the box body in the blank state, and is engaged with the open stop piece in a state where the cover is closed inside the side surface of the cover. It is provided with a step portion which stops and keeps the lid closed.

According to a second aspect of the present invention, in the configuration of the first aspect, the opening stop piece is formed in the box body so that the locking action between the opening stop piece and the step is performed in the vicinity of the upper front corner of the box body. Is provided on the upper front side of the side plate.

According to a third aspect of the present invention, in the configuration of the second aspect, the opening-stopping piece includes an opening edge in the box body side plate,
It is provided on the diagonal line connecting the side in contact with the front plate, and the step is
It is provided on the side surface of the lid on the oblique line corresponding to the opening stopper.

As described above, since the opening stopper is provided on the main body side plate so as not to protrude outside the outer contour of the box body in a blank state, the required area of the blank base paper is reduced by the opening stopper. There is no increasing adverse effect. For this reason, the amount of paper used can be reduced as compared with a known box.

Further, in the blank state, the opening stopper does not become the outermost portion, so that there is no possibility that the opening stopper comes into contact with or collides with another object to be damaged when the blank is carried.

According to the configuration of the second aspect, the locking action by the opening stopper piece and the step portion is close to the upper part of the front corner of the box main body, and it is easy to secure tight and dimensional accuracy, and stops the opening of the lid. Since the locking force is performed at a portion where the locking force acts most efficiently, a stable sealing function can be obtained.

In a box such as a wrap film box for storing an article wound in a roll shape (hereinafter referred to as a roll body), a position where the opening stopper piece is separated from the end face of the roll body (near the upper part of the front corner of the box body). In this case, the lid can be freely moved inward without being hindered by the roll body, so that the opening stopper piece can be opened and closed lightly without causing the opening and closing resistance of the lid body.

As described above, since an unreasonable load does not act because the opening stopper piece can escape to the inside, there is little settling of the opening stopper piece, and the sealing function is maintained for a long time.

When a box is vertically packed in an outer box and transported, there is no possibility that a load acts on the opening stopper piece through the roll body and the opening stopper piece is crushed.

On the other hand, according to the third aspect of the present invention, with the lid closed, the inclined step portion and the opening stopper piece come into contact with each other,
Since the lid exerts a stable resistance to the opening force, the sealing function is more reliable.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

In the following embodiment, a wrap film box is taken as an example in accordance with the description of the prior art.

First Embodiment (See FIGS. 1 to 4) In FIGS. 1 to 3, D is a box main body, and E is a lid.

The box body D is formed in an elongated rectangular parallelepiped shape having an open upper surface by a bottom plate 21, a front plate 22, left and right side plates 23, 23 and a back plate 24, and a wrap film F wound inside in a roll shape. Is accommodated.

The cover B includes a top surface 25 and a box body side plate 2.
A cutting blade 28 configured to cut a wrap film F drawn out of the box body D is formed in a box shape including left and right side portions 26, 26 covering the main body 3 and 23 and a front portion 27 covering the main body front plate 22. It is provided at the lower end of the front part 27.

Numeral 29 denotes a projection preventing piece which is provided inwardly at the opening edge of the box body front plate 22 to prevent the wrap film F from jumping out.

On the other hand, as a sealing structure of the lid E, an opening stop piece 30 is provided at the opening edge of the main body side plates 23, 23 so as to protrude outward, and the side portions 26, 26 of the lid B are provided.
A step 31 is provided on the inside of the cover B, and when the lid B is closed, the opening stop piece 30 is locked to the step 31 so that the cover B
Is kept closed.

Here, the opening stopper 30 is provided on the front side of the opening edge of the box body side plates 23, 23, and the locking action of the opening stopper 30 and the step 31 is performed by the box body side plates 23, 23.
And the front plate 22 in the vicinity of the upper corner.

The opening stopper piece 30 is not limited to the illustrated rectangular shape, but may have another shape such as a semicircle or a trapezoid.

FIG. 4 shows the unfolded state of the box, that is, a blank G as a cardboard material which is folded to form a box.

As in the case of the conventional box shown in FIGS. 7 and 8, the bottom plate 21, the front plate 22, and the rear plate 24 of the box body D are provided with folded pieces 23a, 23b, 23c at both right and left ends. At the time of assembling the box, these are superimposed on the outside, the middle, and the inside in the above order, and adhered to form the left and right side plates 23, 23.

The top surface 25 and the front surface 27 of the lid E are also provided.
Similarly, folded pieces 26a and 26b are protruded from both right and left ends, and these pieces are folded and adhered to form left and right side portions 26 and 26.

In FIG. 4, X... Are folds for folding and assembling the box body D and the lid E from the blank G.

The opening stopper pieces 30, 30 correspond to the blank G
In the manufacturing step, the folded piece 23b connected to the main body front plate 22 is outwardly connected in the blank width direction (vertical direction in FIG. 4) via a fold Y. , 2 outwardly.

On the other hand, a gap α is provided between the folded pieces 26a and 26b connected to the lid top face 25 and the front face 27, and the two folded pieces 26a and 26b are moved in and out while maintaining this gap α. By folding and bonding, a step portion 31 shown in FIGS. 1 to 3 is formed between the folded pieces 26a and 26b.

In this box, in the state of the blank G, the anti-opening piece 30 is provided on the side of the folded piece 23b forming the main body side plate 23 in the blank width direction.
The protrusion is provided so as not to protrude beyond 9.

That is, the opening-stopping piece 30 is provided in such a manner that it does not protrude at all in the blank length direction and the width direction from the outer contour of the box body D (a basic outer shape formed by an essential part of the box body D). ing. For this reason, this opening stopper piece 3
With 0, there is no possibility that the dimensions of the blank base paper increase in the length direction or the width direction. In other words, the provision of the opening stopper pieces 30 does not cause a problem of an increase in the required area of the base paper, and the amount of paper used can be reduced as compared with the known box shown in FIGS.

Further, the vicinity of the upper portion of the front corner of the box main body D where the locking member 30 and the step portion 31 are engaged is more tight and easy to secure dimensional accuracy than the portion away from the corner, and Since the sealing force for stopping the opening of the lid acts most efficiently, a stable sealing function can be obtained.

Further, the provision of the opening stopper 30 near the upper part of the front corner of the box body has the following advantages.

(A) As shown in FIG.
Is removed from the end face of the wrap film F wound in a roll shape (including the paper tube F1 wound with the film F),
When the lid E is opened and closed, the opening stopper 30 can freely move inward without being blocked by the wrap film F.
For this reason, the opening prevention piece 30 can be opened and closed lightly without causing the opening and closing resistance of the lid E.

(B) As described above, since an unreasonable load does not act because the opening stopper piece 30 can escape to the inside, there is little settling of the opening stopper piece 30 and the sealing function is maintained for a long time. .

(C) The wrap film box is packed vertically in a large outer box during transportation. In this case, a load acts on the opening stopper 30 through the wrap film F, and the opening stopper 30
There is no risk of collapse.

Second Embodiment (see FIGS. 5 and 6) Only differences from the first embodiment will be described.

In the second embodiment, the opening stopper 30
In the upper part of the front side corner of the box body side plate 23, it is provided obliquely through a fold line Y on a diagonal line connecting an opening edge and a side contacting the front plate 22.

On the other hand, a substantially V-shaped notch 32 is provided on a side of the folded piece 26a forming the lid side surface portion 26 opposite to the other folded piece 26b.
In the state where 6a and 26b are folded and adhered, a stepped portion 32 on which one side of the notch 32 is locked with the opening stopper 30 is provided.
a is formed.

According to this configuration, in addition to the same basic functions and effects as those of the first embodiment, the inclined step portion 32a and the stopper piece 30 come into contact with each other when the lid E is closed, and the lid E is In order to demonstrate a stable drag against the force to open,
The sealing function becomes more reliable.

Incidentally, it is desirable that the opening stopper piece 30 is provided near the upper part of the front corner of the box body D as in the above-described embodiment. The position of the stop piece 30 is not limited, and may be provided near the upper part of the rear corner or in the middle part between the upper parts of the both corners under the condition where the above-described basic effect is obtained.

The present invention can be widely applied not only to the wrap film box described in the above embodiment but also to a box having a rectangular parallelepiped shape such as a box for storing a solid soap.

[0053]

As described above, according to the present invention, since the opening stopper is provided so as not to protrude outside the outer contour of the box body in the blank state, the blank base paper is provided by the opening stopper. The required area, that is, the amount of paper used does not increase. For this reason, compared with the known box, the amount of paper used can be reduced and cost can be reduced.

Further, in the blank state, the opening stopper does not become the outermost portion, so that there is no possibility that the opening stopper comes into contact with or collides with another object to be damaged when the blank is carried.

According to the second aspect of the present invention, since the locking action by the opening preventing piece and the step is performed near the upper part of the front corner of the box body, a stable sealing function can be obtained. In a box for accommodating a roll body such as a wrap film box, the opening stopper piece can freely move inward without being hindered by the roll body, so that the lid body can be opened and closed lightly without opening / closing resistance of the lid body.

Further, since an unreasonable load does not act because the opening stopper piece can escape to the inside as described above, there is little settling of the opening stopper piece, and the sealing function is maintained for a long time. For example, in the case where the product is transported vertically packed in an outer box, there is no possibility that a load acts on the opening stopper piece through the roll body and the opening stopper piece is crushed.

On the other hand, according to the third aspect of the invention, with the lid closed, the inclined step portion and the opening stopper piece come into contact with each other,
Since the lid exerts a stable resistance to the opening force, the sealing function is more reliable.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wrap film box according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view showing one end of the box and partially exploded.

FIG. 3 is an enlarged side view of the box.

FIG. 4 is a development view of the box.

FIG. 5 is a partial perspective view of a wrap film box according to a second embodiment of the present invention.

FIG. 6 is a development view of the box.

FIG. 7 is a perspective view of a conventional wrap film box.

FIG. 8 is a development view of the box.

[Explanation of symbols]

 D Box body 21 Bottom plate constituting the box body 22 Front plate 23, 23 Side plate 24 Back plate E Cover 25 Top surface 26, 26 Side surface 27 Front surface 30 Opening stopper 31 Step 32 Notch forming step 32a Step

Claims (3)

[Claims] 1. A box body having an opening and a lid for opening and closing the opening are assembled by folding one blank, and the lid is a side part that covers a side plate of the box body. And a paper box formed in a box shape having a front portion that covers the front plate of the main body, wherein an opening stopper piece that protrudes outward in the assembled state on the side plate of the box main body, the box in a state of the blank, The lid is provided at a position that does not protrude outside the outer contour of the main body, and is held inside the side surface portion of the lid by the opening stop piece while the lid is closed to hold the lid closed. A paper box provided with a step portion. 2. The paper box according to claim 1, wherein the opening stopper is provided on the side plate of the box main body so that the locking operation between the opening stopper and the step is performed in the vicinity of the upper front corner of the box main body. A paper box characterized by being provided on the upper front side. 3. The paper box according to claim 2, wherein the opening stopper piece is provided on an oblique line connecting an opening edge of the box body side plate and a side contacting the front plate, and a step portion is provided on the lid side surface portion. 3. The paper box according to claim 1, wherein the paper box is provided on a diagonal line corresponding to the opening stopper.