JP4003212B2 - Anti-spilling carton - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper carton suitable mainly for storing powdery or granular products such as detergents.
[0002]
[Prior art]
Conventionally, to fill and package powder or granular contents, a rectangular four-side plate is connected in one direction, and inner and outer flaps for sealing are connected to the top and bottom of the four-side plate, and the inner and outer flaps are attached. Thus, paper cartons that are box-shaped in a substantially rectangular or square shape are widely used.
In such a paper carton, when a carton blank, which is a box material, is assembled by a cartoning machine, the eight corners of the box may not be bent correctly 90 degrees from the crease, and a small gap may be formed at the corner. When gaps are formed, moisture may be absorbed from the gaps during product storage, and the contents may leak out of the carton during transportation and use.
[0003]
As a paper box for preventing leakage from a corner portion, four side plates and a glue margin piece as shown in FIG. 15 are sequentially arranged via crease lines (a, b, c, d). An upper surface plate, an upper surface inner plate, and two upper folding pieces are connected to each other through the crease line (e) at the upper end sides of the four side plates, and at the lower end sides of the four side plates, The bottom plate, the bottom inner plate, and the two lower folding pieces are connected to each other via the crease line (f), and after the side plate and the adhesive margin piece are bonded, the two upper folding pieces and two pieces A powder paper box that is folded into a lower fold piece and bonds the upper surface plate, the upper surface inner plate, and the lower surface plate and the lower surface inner plate into a rectangular parallelepiped box, and is formed at the corner of the powder paper box. There is a configuration in which a short half-cut line 50 continuous to the crease line is provided at each intersection of the corresponding crease line (a, b, c, d) and the crease line (e, f). The (For example, see Patent Document 1 below)
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 7-35312
In the paper box described in the above publication, after bonding the side plate and the adhesive margin piece, two upper folding pieces and one lower folding piece are folded, and an upper surface plate, an upper surface inner plate, a lower surface plate, a lower surface inner plate, Boxes are made in a rectangular parallelepiped shape, but even when there are variations such as filling and folding operations in the box making process and right angle accuracy is difficult, the short half-cut line 50 allows the crease line to be accurately folded at a right angle. In this case, the corners of the powder paper box made in a rectangular parallelepiped shape are prevented from expanding, so that no gaps are formed in the corners, thereby preventing leakage of the contents.
[0006]
[Problems to be solved by the invention]
However, this conventional technology only creates a gap at the corner without cutting the surface layer of the boundary between adjacent inner and outer flaps of the carton, so that not only the corner of the carton but also a wide area including the corner. It cannot cover the area. Therefore, when the box is swollen or distorted during transportation, storage, or use, there is a gap at the base of the flap, or the box corners are bumped or dropped during handling. However, it has not yet completely solved the disadvantage that a gap is easily formed and a powder or granular product leaks from the corner.
[0007]
Therefore, the present invention allows the water-like corner fins to be automatically formed in the box making process at the corner portion of the box, so as not to cause a gap that causes leakage of the contents. The present invention provides a paper carton capable of preventing leakage of powdered or granular contents.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the powder leakage prevention paper carton of the present invention employs the following means.
In a sealed end type paper carton that seals the opening by adjacent inner and outer flaps connected to the opening of the cylindrical body,
The base portion of the boundary between the adjacent inner flap and the outer flap is formed as a continuous state in a thin back layer portion without being separated, and the back layer of the outer flap is peeled off, and the root portion of the inner flap is A corner-shaped fin that can cover a wide area including the corners of the carton so as to protrude toward the outer flap is formed integrally with the inner flap, and when the outer flap is bent, the corner fin is placed on the inner flap. It is characterized by being folded and made into a box.
[0009]
The base portion of the boundary between the adjacent inner flap and the outer flap is engraved with a straight front half cut cut to about half of the paper thickness from the flap surface side, and the outer flap has a paper thickness from the back side of the flap. An arc-shaped back half cut cut to about half is formed, and the web-shaped corner fin is formed on the back surface layer of the outer flap.
Furthermore, a ruled line is provided from the back surface from the center of the arc to the circumference so as to bisect the arc.
[0010]
The corner fins are provided at at least four corners located at the bottom of the seal end carton.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a carton blank showing a first embodiment. Although this blank 10 is formed from a paperboard, the composite material which bonded the paper and the film and paperboard which gave surface processings, such as a moisture-proofing process, to the paperboard as needed can be used.
[0012]
In the carton shown in the present embodiment, a pair of rectangular side plates 11 constituting a long surface (longitudinal surface) among the opposing side surfaces of the carton and a rectangular surface constituting a short surface (width surface) are formed in the central portion of the blank 10. The end plates 12 are alternately arranged in one direction via broken lines.
A bottom outer flap 14 is connected to the lower edge of the side plate 11, and a top outer flap 16 is connected to the upper edge via a broken line. On the other hand, a bottom inner flap 15 is connected to the lower edge of the end plate 12 and a top inner flap 17 is connected to the upper edge via a broken line. Reference numeral 13 denotes an adhesive margin piece continuously provided at the end of the blank 10.
[0013]
In the present invention, the dimension F1 in the length direction of the bottom outer flap 14 is formed to be substantially equal to the length W in the width direction of the face plate 12 constituting the width surface of the carton, and the bottom outer flaps 14 are folded together. The entire bottom surface of the box is closed. The lengthwise dimension F2 of the top surface outer flap 16 is formed to be substantially equal to the length W of the face plate 12 constituting the width surface of the carton, and the top surface outer flaps 16, 16 are folded together. The top of the box is sealed.
[0014]
The following bottom leakage prevention mechanism, which is a feature of the present invention, is provided for the bottom flaps 14 and 14 and the bottom flaps 15 and 15.
That is, the boundary between the adjacent outer flap 14 and the inner flap 15 is separated except for the root portion. In other words, the base portion of the boundary between the outer flap 14 and the inner flap 15 is formed in a continuous state.
FIG. 2 shows an enlarged plan view of the portion A of FIG. 1 viewed from the flap front side. As shown in FIG. 2, a linear half cut 20 (front half cut) cut from the front side of the flap to about half the blank paper thickness is engraved at the base portion of the boundary line that divides the inner and outer flaps. .
[0015]
FIG. 4 shows an enlarged plan view of the portion A of FIG. 1 viewed from the back side of the flap. As shown in FIG. 4, an arcuate (fan-shaped) half cut 21 (back half cut) is cut on the back surface of the outer flap 14 from the flap back surface side to approximately half the paper thickness. This arc-shaped back half-cut 21 is formed in a substantially quadrant. The radius of the arc is preferably about 7 mm to 15 mm as an example in the case of a 500 g detergent containing carton container, although it depends on the size of the carton.
Furthermore, in the present invention, in the substantially quadrant arc-shaped fin described above, it is preferable to provide a ruled line from the back surface from the center of the arc to the circumference so as to bisect the arc. Thereby, when the inner flap is folded by an automatic machine, the fin is folded correctly in the correct direction. The ruled lines are not displayed in FIG. 1, but are displayed as dotted lines 61 in FIG.
[0016]
FIG. 3 shows a cross-sectional view of the blank of the half cut portion described above. As shown in the figure, a front half cut 20 and a back half cut 21 are formed on the bottom outer flaps 14 and 14 and the bottom inner flaps 15 and 15, and the paper layer portion between them is the outer flap. 14 and peeled off from the corner 14 to prevent leakage from the box corner as described later.
[0017]
In the present embodiment, the same anti-spilling mechanism as the anti-spilling mechanism on the bottom surface is formed at the root portion of the top outer flap 16 and the inner flap 17.
That is, the boundary between the adjacent outer top surface flap 16 and the inner flap 17 is separated leaving the root portion.
The root portion of the outer flap 16 and the inner flap 17 is the same as the bottom surface (see FIG. 2), and the root portion that divides the inner and outer end flaps is a straight half that is cut from the front side of the flap to about half the blank paper thickness. Cut 20 (front half cut). Similarly to FIG. 4, an arcuate half cut 21 (rear half cut) is formed on the back surface of the outer flap 16 by cutting it from the flap back surface side to approximately half the paper thickness. The back half cut 21 is formed in a quadrant.
The paperboard used in the box of the present invention is not particularly limited, but a paperboard obtained by laminating multilayer paperboard mainly made of used paper and kraft paper is preferable. By using the kraft paper layer as the back layer (inner layer of the box), the corner fins can be peeled cleanly without breaking, and can be folded accurately.
[0018]
Although not an essential requirement of the present invention, as shown in the drawing, an opening zipper 19 may be provided in the vicinity of the upper ends of the side plate 11 and the end plate 12 so that the box can be easily opened. The zipper 19 is constituted by a broken line 18 such as a perforation line, a half-cut line, a tethered tear line, and the like, and is separated from the box body into an elongated band when opened.
[0019]
In order to assemble the carton blank 10, the side plate 11 and the end plate 12 are sequentially bent, and the adhesive margin piece 13 is attached to the opposite end plate 12 and connected in a rectangular tube shape. This carton can be stored in a folded state until it is assembled.
When filling the carton with the contents and making the box, the blank is raised in a square tube shape, and then the bottom surface of the carton is bent in the order shown in FIGS.
First, as shown in FIG. 6 from the state of FIG. 5, the bottom outer flaps 14, 14 are bent to the outside of the side plate 11. At this time, the back half-cut 21 and the front half-cut 20 are broken, and the paper layer on the back surface of the outer flap is peeled off to form the water-fed corner fins 22.
Next, the bottom flaps 15 and 15 are bent to the inside of the end plate 12 (see FIG. 7). At this time, the drain-shaped corner fin 22 is folded in half. Next, the corner fins 22 are folded over the folded bottom flap 15 and the bottom flap 14 is folded and glued to adhere the bottom flaps 14 to each other.
The corner fins 22 formed at the four corners of the bottom of the box are integrally continuous with the three sides of the side plate 11, the end plate 12 and the bottom flap 15 and the base of the flap, and are folded together with the flap when the bottom is sealed. Thus, not only the corners of the carton but also a wide surface area including the corners are covered to prevent the generation of a small gap at the base of the flap.
[0020]
Seal the bottom and then fill the carton with powder detergent and other contents. After completion of the filling operation, the top surface is sealed similarly to the bottom surface (see FIG. 8).
[0021]
As described above, each of the eight corners of the flap base is formed with a scooping-shaped corner fin 22, so that when the flap is bent, the corner of the flap does not fold at a right angle. There is no gap. Further, even when the carton shape collapses due to the swelling of the box, there is no gap at the base of the flap.
Therefore, even when the carton falls during transportation, storage or use, it is possible to prevent the contents from leaking out from the corner of the carton.
[0022]
FIG. 9 is a blank sheet before assembly showing a second embodiment of the present invention.
The material of the blank 23 is the same as that of the blank 10 of the first embodiment. Different points will be described below. Reference numerals 13, 13a and 13b are adhesive margin pieces.
A content outlet 25 is formed above the end plate 12a.
[0023]
The structure of the anti-spilling mechanism provided on the bottom outer flap 14 and the bottom inner flap 15 and the anti-spilling mechanism provided on the top outer flap 16 and top inner flap 17 are the same as in the first embodiment. Since it is the same, explanation is omitted.
[0024]
Further, since the method of assembling the blank 23 is as usual, detailed description is omitted. Even in this embodiment, the front half cut 20 and the back half cut 21 are broken, and the corner fins 22 are peeled off from the back surface of the outer flap 16. That is, after the inner flap 17 is folded inward, the corner fins 22 are folded on the flap, and the outer flap 16 is folded on the outer side (see FIG. 10).
[0025]
In addition, as shown in FIG. 11, the carton of the said embodiment breaks the fracture | rupture line 24, opens the taking-out port 25 inward or outward, tilts the carton, and then uses the contents out.
[0026]
FIG. 12 shows a blank sheet before assembling the carton showing the third embodiment. The carton has inner flaps and outer flaps arranged alternately on the end sides of four wall plates constituting a quadrangular cylindrical body portion via a folding line, and both end surfaces of the body portion are connected to the inner and outer flaps. It is a sealed end type paper carton that seals by the above.
A front plate 34, a bottom plate 35, a back plate 36, and a top plate 37 are connected in the vertical direction in the center of the blank 30, and a product take-out port 39 for opening by a breaking line 38 is provided at the lower end edge of the top plate 37. An engraved front flap 43 is provided continuously, and a connecting flap 33 is provided on the upper end edge of the front plate 34.
The top plate 37 and the bottom plate 35 are provided with side flaps 32 for sealing both end surfaces of the rectangular cylindrical body through a fold line, and the back plate 36 and the front plate 34 are not provided with side plates. The flaps 31 are connected via a broken line.
The boundary between the adjacent outer flap 31 and inner flap 32 is separated leaving the root portion. In the root portion, a straight front half-cut 40 is engraved from the flap surface side to about half the paper thickness.
On the outer flap 31 side, an arc-shaped back half cut 41 cut into approximately half the paper thickness is provided.
When the inner and outer flaps 31 and 32 are folded and the opening surface is closed, the front half-cut 40 and the back half-cut 41 are broken. As a result, a corner fin 42 having a scoop shape is formed at each of the eight corners of the flap base. Therefore, when the flap is bent, a gap is not generated at the base of the flap even if the corner portion is not bent at a right angle. Further, even when the carton shape collapses due to the swelling of the box, there is no gap at the base of the flap.
[0027]
As mentioned above, although the Example of this invention has been described, this invention is not limited to the said Example. For example, the back half-cut for forming the corner fins has an arc shape, but is not limited thereto.
[0028]
【The invention's effect】
As described above, the present invention not only keeps the surface layer of the boundary between adjacent inner and outer flaps of the carton without cutting, but also peels the back layer of the outer flap when folding the outer flap, Since the corner fins of the scraper shape that can cover not only the corners but also the wide surface area including the corners are formed integrally with the inner flap, the corner portion can be accurately positioned when folding the inner and outer flaps during box making Even if it is not bent at a right angle, a small gap (pinhole) does not occur at the base of the flap. Also, if the carton bulges during use, or if the corner is damaged, there will be no gaps in the corner, preventing the powder and granular contents from leaking out of the corner. Can do.
Also, by providing corner fins not only at the four corners of the bottom of the carton but also at the four corners of the top surface, the contents from the corners of the carton may leak even during carton transportation and when the carton rolls over during use. It can prevent sticking out.
The corner fins are formed by peeling the back layer of the outer flap, and are folded on the inner flap when the carton is automatically filled and boxed, so that the assembly is easy without increasing the cost.
[Brief description of the drawings]
FIG. 1 is a plan view of a blank showing an embodiment of a carton according to the present invention.
FIG. 2 is an enlarged plan view of a portion A in FIG. 1 as viewed from the surface.
3 is a cross-sectional view of a portion A in FIG.
4 is an enlarged plan view of a portion A in FIG. 1 as viewed from the back side.
FIG. 5 is a perspective view of a state in which the body portions are coupled during the assembly of the carton of the embodiment.
FIG. 6 is a perspective view showing a state in which an outer end flap is spread outward during sealing of the bottom surface of the carton according to the embodiment.
FIG. 7 is a perspective view showing a state in which the inner end flap is bent inward during the sealing of the bottom surface of the carton according to the embodiment.
FIG. 8 is a perspective view showing a sealed state of the carton.
FIG. 9 is a plan view of a carton blank according to a second embodiment.
FIG. 10 is a perspective view in the middle of sealing the top surface of the carton of the embodiment.
FIG. 11 is a perspective view showing a state in which the carton takeout port of the embodiment is opened.
FIG. 12 is a plan view of a carton blank according to a third embodiment.
FIG. 13 is a perspective view showing an assembled state of the carton of the embodiment.
FIG. 14 is a perspective view of the carton of the embodiment in the opened state.
FIG. 15 is a plan view of a blank showing a conventional example.
[Explanation of symbols]
10, 30 Blank 11 Side plate 12 Tail plate 13 Glue piece 14 Outer flap for bottom surface 15 Inner flap for bottom surface 16 Outer flap for top surface 17 Inner flap for top surface 18, 24, 38 Break line 19 Zipper 20, 40 Half cut 21, 41 Half cut 22, 42 Corner fin 25, 39 Product outlet 31 Side outer flap 32 Side inner flap 33 Connecting flap 34 Front plate 35 Bottom plate 36 Back plate 37 Top plate 43 Front flap 61 Corner fin ruled line

Claims (4)

In a sealed end type paper carton that seals the opening by adjacent inner and outer flaps connected to the opening of the cylindrical body,
The base portion of the boundary between the adjacent inner flap and the outer flap is formed as a continuous state in a thin back layer portion without being separated, and the back layer of the outer flap is peeled off, and the root portion of the inner flap is A corner-shaped fin that can cover a wide area including the corners of the carton so as to protrude toward the outer flap is formed integrally with the inner flap, and when the outer flap is bent, the corner fin is placed on the inner flap. An anti-powder carton characterized by folding and making boxes. The base part of the boundary between the adjacent inner flap and the outer flap is engraved with a straight front half cut cut to about half the paper thickness from the flap surface side, and the outer flap has a paper thickness from the back side of the flap. The anti-spilling carton according to claim 1, wherein an arc-shaped back half cut cut to approximately half is formed and the web-shaped corner fin is formed on a back layer of the outer flap. . The anti-spilling carton according to claim 2, further comprising a ruled line from the back surface from the center of the arc to the circumference so as to bisect the arc. The said corner fin is provided in the at least 4 corner located in the bottom part of the said seal end carton, The anti-spilling carton in any one of Claims 1-3 characterized by the above-mentioned.

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