JP6341765B2 - Packaging box - Google Patents

Description

  The present invention relates to a rectangular packaging box that ensures sealing (sealing) with a cover plate.

An example of this type of rectangular packaging box will be described with reference to FIGS. 1 and 2 showing an embodiment of the present invention. Front and rear plates 1, 3, side plates 2, 2, bottom plates 5, 6 and lid plate 7, the cover plate 7 is provided with an insertion piece 10 extending inward from the upper edge thereof, and the both side plates 2, 2 are formed of a blank provided with a pair of flap pieces 11, 11 extending inward from the upper edge thereof. is there. In this blank, the front plate 1, the pair of side plates 2, 2, and the rear plate 3 are bent through each crease line r, and the passage piece 4 is attached to the side plate 2 to form a frame-like peripheral wall and face each other. The bottom plates 5 and 6 and the adjacent bottom plates 5 and 6 are folded inward through the crease line r, and after each pair of the bottom plates 5 and 6 are bonded together, the bottom plates are closed and the bottom surface is closed, thereby opening the top surface. Configure.
Thereafter, the product is stored in the box. First, the pair of flap pieces 11 and 11 are bent in the inner horizontal direction, and the lid plate 7 is similarly bent in the inner horizontal direction. It is inserted and sealed (see Patent Document 1, Abstract, FIG. 1 and FIG. 2).

JP2013-209114A JP 2014-58321 A

  In the conventional packaging box, a cut is made at the base of the insertion piece 10 and a notch is formed on each side edge of the pair of flap pieces, and the insertion piece 10 is inserted when the insertion piece 10 is inserted inside the front plate 1. The base of the piece 10 enters the notch of the flap pieces 11 and 11 through the notch, and the edge of the base of the insertion piece 10 is engaged with the edge of the flap pieces 11 and 11 forming the notch, and the insertion piece 10 prevents the cover plate 7 from being removed (not opened) (see Patent Document 1).

However, in the conventional example, the lid plate 7 is connected to the rear plate 3 via the crease line r, and the insertion piece 10 is connected to the lid plate 7 via the crease line r. Even if the piece 10 is bent through the crease line r, the cover plate 7 floats with respect to the rear plate 3 and the insertion piece 10 floats with respect to the cover plate 7 by the restoring force of the cardboard or the like that is the blank material. A force to lift (return) acts.
With this action, the insertion piece 10 jumps forward and floats upward. The jumping and lifting of the insertion piece 10 has the effect of releasing the engagement between the base edge of the insertion piece 10 and the edges of the flap pieces 11 and 11 forming the notches. For this reason, the latch may be released for some reason, and the lid plate 7 and the insertion piece 10 may float. This raised state is not preferable as a packaged state, and its improvement is desired.

  This invention makes it a subject to prevent the floating of the said insertion piece 10 under the above actual condition.

In order to achieve the above object, according to the present invention, the crease line from the lid plate to the insertion piece is formed into an outwardly convex arc shape.
When the crease line has an outer convex arc shape, when the insertion piece is inserted, the insertion piece is warped outwardly by the arc-shaped crease line and both side edges thereof are urged inward. Therefore, a cut is made in the base of the insert piece, a notch is formed in the upper edge of the pair of flap pieces, and when the insert piece is inserted, the base of the insert piece is cut through the notch of the flap piece. If the structure is such that the edge of the base of the insertion piece engages with the edge of the flap piece that forms a notch, the urging ensures the engagement.

  Incidentally, although the arc-shaped crease line is well known (see Patent Document 2, FIG. 1 and FIG. 3), the arc-shaped crease line is for conforming to the shape of the packaged product, and as in the present invention, It does not act to warp the outer convex shape and urge both side edges of the insertion piece inward to ensure locking of the insertion piece.

  As a specific configuration of the present invention, the front and rear plates, both side plates, the bottom plate, and the cover plate are provided. The cover plate is provided with an insertion piece extending inward from the upper edge thereof, and the front and rear plates and both side plates connected to the cover plate. A rectangular packaging box in which a pair of flap pieces extending inward from the upper edge is provided on a plate connected to both sides of a single plate, and the insertion piece is inserted inside the plate facing the plate connected to the lid plate and sealed. The crease line of the connecting portion between the cover plate and the insertion piece is formed in an outer convex arc shape, and a notch is made at the base of the insertion piece, and the side edge of the pair of flap pieces is connected to the one plate from its tip. A notch that does not reach the connection portion with the plate is formed, and when the insertion piece is inserted into the inside of the plate facing the plate connected to the lid plate, the base of the insertion piece is inserted into the flap piece via the notch. Get into the cutout It can be the base of the edge of the insertion piece to adopt a configuration for locking the edge of the flap piece forming the notch.

  As described above, the rectangular packaging box having this structure is configured such that the insertion piece is bent outwardly by the arc-shaped crease line and both side edges thereof are urged inward, so that the base edge of the insertion piece is notched. If it latches on the edge of the flap piece to make, the latch will become reliable and it will not be easy to remove the latch. For this reason, it is hard to be mischievous, such as taking out the enclosed goods. In particular, when the rectangular frame-shaped cylinder is packaged with a film or the like, it is almost impossible to take out the product.

At this time, a crease line is provided from the notch end of the side edge of the pair of flap pieces to the crease line of the connecting portion with the plate connected to the one plate, and the flap piece of the fold line and the one plate It can be set as the structure formed from the point which reached the crease line with the board connected to to the point before the cut | disconnection on the crease line to the side edge of a flap piece.
In this way, when the cover plate is forcibly pulled up (opened), the locking part between the base edge of the insertion piece, the notch and the edge of the flap piece is also pulled, so that one of the edges from the side edge of the flap piece The crease line with the plate is torn to the cut line, and the part surrounded by the crease line and the cut line is pulled up through the crease line from the notch end of the side edge of the flap piece to the crease line with the one plate. (Stand up). For this reason, the opening can be confirmed reliably.

  Since the present invention is configured as described above, it becomes a packaging box that is surely sealed and difficult to tamper with the product.

The top view of the blank of one Embodiment of the packaging box which concerns on this invention Perspective view of the same embodiment Cross-sectional view of the main part of FIG. Action perspective view of the same embodiment Plan view of blank according to another embodiment (A) and (b) are perspective views for explaining the operation of the embodiment. Cross-sectional view of the main part of FIG. Action perspective view of the same embodiment Still another embodiment perspective view

  One embodiment of a square packaging box according to the present invention is shown in FIGS. 1 to 4, and this packaging box P is formed from a cardboard blank as shown in FIG. In this blank, the front plate 1, the side plate 2, the rear plate 3 and the side plates 2, 2 are successively arranged via a linear crease line r, and the passage piece 4 is connected to the front plate 1 with a linear crease line r. It is connected through. A bottom plate 5 is connected to the lower ends of the front plate 1 and the rear plate 3, a bottom plate 6 is connected to the lower ends of the side walls 2 via straight crease lines r, and a lid plate 7 is connected to the upper end edge of the rear plate 3. The connecting piece 10 is connected via a straight crease line r, and the insertion piece 10 is connected from the upper edge of the cover plate 7 via a crease line r1. Further, flap pieces 11, 11 are connected to the side plates 2, 2 from the upper edge thereof via a straight crease line r. In the drawing, fine lines indicate crease lines r, r1, r2, and thick lines indicate cut lines (cut lines).

  A notch 12 is formed at the base of the insertion piece 10, and a notch 13 is formed on each side edge 11 a of the pair of flap pieces 11. This notch 13 is cut in an arc shape from the end of the leading edge of the flap piece 11, and is obliquely cut to reach the crease line r with the side plate 2. The starting point portion to be turned up is an edge 11a that engages with the base edge 10a of the insertion piece 10 described below.

  A crease line r1 forming a connecting portion between the lid plate 7 and the insertion piece 10 has an arcuate shape protruding outward (left side in FIG. 1). For this reason, when the insertion piece 10 is bent inward with respect to the cover plate 7 through the crease line r1, the insertion piece 10 is urged inward by its arcuate crease line r1 to warp outwardly. (See FIG. 2). By this urging, the base of the insertion piece 10 enters the notch 13 of the flap piece 11 through the notch 12, and the base edge 10 a of the insertion piece 10 is engaged with the edge 11 a of the flap piece 11 forming the notch 13. Stop. For this reason, the curvature of the crease line r1 is appropriately determined in consideration of the degree of locking between the base edge 10a of the insertion piece 10 and the edge 11a of the flap piece 11 depending on the biasing degree.

Further, a crease line r2 is formed from the end of the notches 13 and 13 (the raised edge) on the side edges of the pair of flap pieces 11 and 11 to the crease line r with the side plates 2 and 2, and the crease line A cut line 14 is formed on the crease line r from the point where the fold line 11 of the r2 flap plate 11 and the side plate 2 reach the crease line r to just before reaching the side edge of the flap piece 11.
Therefore, when the cover plate 7 is forcibly pulled up (opened) in the sealed state in which the insertion piece 10 is inserted into the front plate 1, the base edge 10 a of the insertion piece 10 and the edge of the notch 13 of the flap piece 11 Since the engaging portion with 11a is also pulled, the crease line r with the side plate 2 from the side edge of the flap piece 11 is torn to the cut line 14, and as shown in FIG. 4, the crease line r2 passes through the crease line r2. The portion (open display piece) 15 surrounded by the line r2 and the cut is pulled up (stands up), or the open display piece 15 is lost. For this reason, the opening can be confirmed reliably.

  Note that the loss of the open display piece 15 is likely to occur when the middle of the crease line r2 is a cut as shown in FIG. Therefore, when the middle of the crease line r2 is a cut, the cut 14 on the crease line r is not formed, and when the insertion piece 10 is pulled up, the portion of the crease line r2 is lost and the flap piece 11 and The open display piece 15 can be pulled up through the crease line r of the connecting portion with the side plate 2.

The packaging box P of this embodiment has the above-described configuration. As shown in FIG. 2, in order to assemble the blank shown in FIG. 1 and wrap the product, a front plate 1, a pair of side plates 2, 2 and the rear plate 3 are bent through the respective crease lines r, and the passage piece 4 is attached to the rear plate 3 to form a frame-shaped peripheral wall. The opposed bottom plates 5 and 6 and the adjacent bottom plates 5 and 6 are After folding inwardly through the crease line r by a well-known method and bonding each pair of the bottom plates 5 and 6 together, they are meshed to close the bottom surface.
Thereafter, the product is stored in the box P, and the flap pieces 11 and 11 are first bent inwardly in the horizontal direction, and then the lid plate 7 is closed via the crease line r. Insert the inside of 1.

  When the insertion piece 10 is inserted, the crease line r1 of the insertion piece 10 has an outwardly convex arc shape, so that the insertion piece 10 is warped outwardly by the arc-like crease line r1 and both side edges thereof are inward. Be energized. Therefore, the root of the insertion piece 10 enters the notch 13 of the flap piece 11 through the notch 12 by the biasing force, and the edge 10 a of the root of the insertion piece 10 forms an edge of the notch 13. Locks to 11a. The locking is performed in the notch 13 that has entered from the side edge of the flap piece 11, and the central portion of the insertion piece 10 is convex outward and is in contact with the inner surface of the front plate 1 and is biased inward. Therefore, the locking between the base edge 10a of the insertion piece 10 and the edge 11a of the flap piece 11 is reliable. For this reason, the cover plate 7 is not inadvertently detached.

In order to open (open) the sealed box, as shown in FIG. 4, a finger is put on the insertion piece 10 from the finger-hanging cutout 16 on the upper edge of the front plate 1, and the lid plate 7 is pulled up to be opened.
At this time, since the engaging portion between the base edge 10a of the insertion piece 10 and the edge 11a of the notch 13 of the flap piece 11 is also pulled with the opening, the fold line between the side edge of the flap piece 11 and the side plate 2 is drawn. The line r is torn to the cut line 14, and the open display piece 15 surrounded by the crease line (r2) and the cut line 14 is pulled up (rises) through the crease line r2, or the open display piece 15 is missing. (See FIG. 4).
Since the opening display piece 15 can be reliably confirmed by being pulled up or missing, even if it is illegally opened in a physical distribution process, etc. Since it becomes easy to discover, mischief can be prevented in advance.

5 to 8 show other embodiments, and the packaging box P1 of this embodiment is provided with the locking pieces 17 on both sides of the insertion piece 10 via the linear crease line r in the above embodiment. is there.
This packaging box P1 is a frame composed of a front plate 1, a pair of side plates 2, 2 and a rear plate 3 as shown in FIG. After the bottom wall is closed with the bottom plates 5 and 6, the product is stored in the box P.
After the storage, as shown in FIG. 6 (a), the flap pieces 11, 11 are bent inwardly in the horizontal direction, and then the lid plate 7 is closed via the crease line r. The insertion piece 10 is inserted inside the front plate 1 in a state where the insertion piece 10 is bent inward and along the insertion piece 10.

When the insertion piece 10 is inserted, as shown in FIG. 6B, the locking piece 17 stands up with the restoring force of the crease line r portion. At this time, similarly to the above, the central portion of the insertion piece 10 is convex outward and is in contact with the inner surface of the front plate 1 and biased inward.
For this reason, when the lid plate 7 is opened, as shown in FIG. 8, the locking piece 17 cannot be sufficiently opened by holding (latching) the flap piece 11. For this reason, the product inside cannot be taken out easily.

  Also in the packaging box P1 of this embodiment, a crease line is formed from the end of the notch 13, 13 on the side edge of the pair of flap pieces 11, 11 to the crease line r with the side plates 2, 2, and the crease line When the lid plate 7 is lifted and opened when the cut line is formed from the point reaching the crease line r between the flap piece 11 and the side plate 2 to the side edge of the flap piece 11 on the crease line r, When the open display piece surrounded by the cut is pulled up or the open display piece is missing, the opening can be confirmed.

FIG. 9 shows still another embodiment. A packaging box P2 of this embodiment is provided with a front top plate 18 via a crease line r on the front plate 1, and a connecting portion (fold line) between the front top plate 18 and the front plate 1 is shown. The insertion port 19 is formed on the line r).
The packaging box P2 closes by inserting the insertion piece 10 into the insertion opening 19 thereof. At that time, since the insertion piece 10 is connected to the front plate 1 via the outer convex arc-shaped crease line r1, similarly, the insertion piece 10 is surely locked to the side edge (front top plate 18) of the insertion port 19. The seal is certain.

  Also in the packaging box P <b> 2 of this embodiment, the opening display piece 15 having the same configuration as described above can be formed on the front top plate 18 forming both side edges of the insertion slot 19 so that the opening can be confirmed. Further, the flap piece 11 can be omitted.

In each of the above embodiments, the lid plate 7 is connected to the rear plate 3, but the lid plate 7 can be connected to the side plate 2. In this case, the flap piece 11 is connected to the front and rear plates 1 and 3.
Further, the material of the rectangular packaging box according to the present invention is not limited to cardboard, and various materials such as plastic plates and cardboard can be adopted.
The configuration having the locking piece 17 can also be adopted in the case where the insertion piece 10 is connected to the lid plate 7 by a straight crease line r.

P, P1, P2 Packaging box r, r2 Linear crease line r1 Arc crease line 1 Front plate 2 Side plate 3 Rear plate 4 Subsequent pieces 5, 6 Bottom plate 7 Lid plate 10 Insertion piece 10a Insertion base edge 11 Flap Fragment 11a Edge to be engaged with the insertion piece of the flap one side edge 12 Insertion piece notch 13 Flap piece side edge notch 14 Notch 15 Open display piece 16 Finger hook notch 17 Locking piece 18 Front top plate 19 Insertion slot

Claims (2)

An insertion piece (10) having front and rear plates (1, 3), both side plates (2, 2), a bottom plate (5, 6) and a lid plate (7) and extending inwardly from the upper edge of the lid plate (7). ) And the plate (2, 2) connected to both sides of the front plate (1, 3) connected to the cover plate (7) and one plate (3) of the side plates (2, 2). A pair of flap pieces (11, 11) extending inward from the edge are provided, and the insertion piece (10) is inserted inside the plate (1) facing the plate (3) connecting the lid plate (7). A rectangular packaging box for sealing,
The crease line (r1) of the connecting portion between the lid plate (7) and the insertion piece (10) is formed in an outer convex arc shape, and a notch (12) is made at the base of the insertion piece (10). Cutouts (13, 13) are formed on the side edges of the flap pieces (11, 11) so as not to reach the connecting portion with the plate (2, 2) connected to the one plate (3) from the tip thereof, When the insertion piece (10) is inserted into the inside of the plate (1) facing the plate (3) connected to the lid plate (7), the root of the insertion piece (10) passes through the notch (12). Into the notches (13, 13) of the flap pieces (11, 11) and the edge (10a) of the base of the insertion piece (10) forms the notches (13, 13). 11) Locked to the edge (11a) Horn-shaped packaging box. Said pair of flaps pieces (11, 11) side edge of the notch (13, 13) end and connected to the upper SL one plate (3) from the plate (2) and the connection portion of the fold line of the (r) From the point of reaching the crease line (r) between the flap piece (11) of the crease line (r2) and the plate (2) connected to the one plate (3). The square packaging box according to claim 1, wherein the cut line (14) on the crease line (r) is formed up to the side edge of the flap piece (11).

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