JPH08192836A - Flat re-sealable lid - Google Patents

Abstract

PURPOSE: To provide a flat re-sealable lid which can simply re-seal with one- touch operation and can be employed in a wide range of cartons. CONSTITUTION: In a double flat panel of a carton assembled from a blank, at least a surface panel is a folded piece 5, and a locking piece 10 formed of the surface folded piece 5 peeled from the double flat panel or part of the surface folded piece and an opposite rear folded piece 6 or a rear panel and provided on the surface folded piece 5 is locked to an end rim of an opening provided on the rear panel. Thus a flat re-sealable lid can be obtained wherein the carton can be re-sealed, and the surface folded piece 5 swings with a fold 11 provided at the end rim of the surface folded piece 5 as an axis.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid which can repeatedly open and close a part of a carton.

[0002]

2. Description of the Related Art There are various conventional cartons having a rectangular parallelepiped shape and having a function of resealing the opening after the contents are once taken out, but the most typical and common one is a carton with an insertion flap shown in FIG. Is. Further, as shown in FIG. 8 (a), the top plate portion is largely opened and then re-sealed by the side wall portion. Although it is not a rectangular parallelepiped, four top plate flaps are crossed with each other as shown in FIG. 8 (b). What is re-sealed, and as a typical example of a series of dispensing containers, there is used one that pushes a once-out dispensing port to re-seal as shown in FIG. 8 (c).

[0003]

However, in the case of the carton with the insertion flap shown in FIG. 7, the notches 18 provided on both sides of the insertion flap 20 connected to the top plate 21 are portions 19 near the folds of the side flaps. Although it is fitted with and makes the sealing firm,
If this fitting is too strong, there is a problem that the carton will be broken at the time of opening. There is also the problem of the resealing operation itself, in which the insertion flap has to be inserted into a slight gap. Further, since the whole top plate 21 is opened and the size of the opening is not controllable, it is impossible to swiftly shake the amount desired by the user when attempting to get out small-sized contents. Further, as shown in FIG. 7 (b), the blank space around the blank of the insertion flap carton has a lot of entry and exit, and in particular, the insertion flap 20 is overhanging. This shape not only reduces the work efficiency when blanking multiple blanks from sheet-shaped or roll-shaped paperboard and punches them, but also wastes paperboard resources and increases the amount of "waste sludge" that becomes industrial waste. are doing. FIG.
The one shown in (a) can be resealed by inserting the inserting piece 22 at the tip of the side flap into the inserting slit 23 provided in the side panel at the time of resealing, but there is a problem that the inserting operation is troublesome. Also, when used upside down, the contents may be opened due to the weight of the contents, and the contents may come out. In FIG. 8B, the resealing operation becomes even more troublesome. The carton shown in FIG. 8C is excellent in operability for resealing, but has a problem that the blank structure is complicated and an expensive carton forming machine is required for automation.

[0004]

The planar resealing lid according to the present invention made to solve the above problems has the following points. (1) In a double flat panel portion of a carton assembled from blanks, at least the front panel is a folded piece, and the front folded piece or a part of the folded piece to be peeled off from the double flat panel portion is opposed. It should be formed by the back side folding piece or the back side panel. (2) The carton is resealed by locking the locking piece provided on the front-side folded piece with the back-side folded piece or the edge of the opening provided on the back-side panel. (3) The front-side folded piece swings around a folding line provided on an edge of the front-side folded piece as an axis.

[0005]

According to the present invention, by providing a means for the panels to be engaged with each other in the double panel portion of the carton whose front side is the folded piece, the opening and closing of the carton can be easily repeated with one touch.

[0006]

The present invention will be described in more detail with reference to the drawings. FIG. 1 is a development view of a carton blank of a first embodiment of a planar resealing lid according to the present invention. FIG. 3A is an assembly drawing thereof. This carton is stuck and folded once
It is a type of Folding Carton. The side panel 3 is connected to both sides of the front panel 1 through fold lines, and the side panel 3 is connected to both sides of the rear panel 2 through fold lines.
One of them and the glue allowance 4 are connected. A side flap 7 is connected to the upper portion of the side panel via a fold line. An outer folded piece 5 and an inner folded piece 6 that are connected to the front panel 1 and the rear panel 2 to form a head double panel are connected to the upper portion of the carton blank via folding lines 11 and 12, respectively. A locking piece 10 is formed by a locking cut 9 at a portion near the center tip of the outer folded piece 5. Perforations 13 for folding back pieces are provided on the left and right sides thereof. A trapezoidal opening piece 8 is provided in the inner folded piece 6 through the perforations 14, or a trapezoidal opening portion is formed by punching the opening piece 8 in advance. The shaded portions in FIG. 1 indicate the locations where the adhesive is partially coated. In this carton blank, the body is once joined to the side panel 3 on the outer side of the blank by the glue allowance 4 and then folded flat, and the bottom is formed by raising it into a prismatic shape by the user's molding / filling / sealing machine (Cartonning Machine). Then, after the contents are filled, as shown in FIG. 3A, both folded back pieces of the head are folded inward and sealed. The molding and sealing of the head is an important point for the present invention. That is, in the head portion, the inner folded piece 6 is folded back approximately 90 °, and the outer folded piece 5 is folded back 90 ° so as to cover the inner folded piece 6 from the opposite direction. It is adhered by using a hot melt adhesive or the like.

Next, a second embodiment will be described with reference to FIG. In the carton blank shown in FIG. 2, the tray is molded by a molding machine (Carton Former) without sticking the body, and the contents are filled with a cover (not related to the cover of the present invention).
It is a type of carton blank that is sealed on all three sides. The assembly drawing is shown in FIG. Bottom plate 21
Side wall panels 22 are connected to the left and right sides of the four sides via folding lines, inner folding pieces 6 that form the front wall panel are connected to the front side via folding lines 12, and side wall panels 23 are connected to the rear side via folding lines. Further, the top plate 25 is extended to the side wall panel 23 through a fold line, the side wall panel 26 is provided on the left and right of the top plate 25 through the fold line, and the outer folded piece 5 serving as a front wall panel is provided at the rearmost portion. Each is connected. Here, the internal structure related to the locking of the outer folded piece 5 and the inner folded piece 6 is the same as that of the first embodiment. This carton blank is formed by a molding machine on the side wall panel 2 around the bottom plate 21.
2 and 23 and the folding piece 6 are locked by the joining flap 24 to form an assembling tray, and after filling the product in this, a top plate 25 is put on and connected to it as shown in FIG. 3 (b). The side wall panel 26 and the outer folding piece 5 are folded back and glued to the tray at the glued portion shown by the diagonal lines. In this case, as in FIG. 1, the outer folded piece 5 is adhered onto the inner folded piece 6, and these two folded pieces form the planar resealing lid according to the invention.

The first embodiment and the second embodiment are completely different in the kind or structure of the carton, but are common in that the planar re-sealing lid according to the present invention is formed in the portion where the two folded pieces overlap. is there. In the case of the second embodiment, the portion where the planar re-sealing lid is formed is originally the front side wall panel portion of the lid box, and the inner folding piece 6 is the portion corresponding to the side wall of the tray as described above. That is, the flat re-sealing lid according to the present invention can be formed at any part of the carton as long as it is a double panel portion of the carton and is at least the outer folded piece. For example,
The planar reseal may be on the left and right sidewall panels as shown in FIG. 6 (a), or as shown in FIG. 6 (b).
It may be on the front or back panel. The planar size can also be freely set within the range that does not exceed the folded piece. Further, the locking piece 1 provided on the flat re-sealing lid
The shape of 0 is not limited to the one shown in the figure, and is semicircular, elliptical,
It may be U-shaped, trapezoidal, or the like.

FIG. 4 is a functional explanatory view of the planar re-sealing lid,
The function will be described in detail with reference to this figure. For convenience of explanation, the planar resealing lid is drawn upward. First, (a) and (a ') are in a state before opening. The arrow 15 on the front panel indicates the opening. (A) is the opening 1
6 is not opened, and (a ') is the case where the opening 16 is punched out in advance. When these are unsealed, the unsealed state as shown in (b) and (b ') respectively, and the opening 16 appears. In the case of (b), the unsealing piece 8 adheres to the outer folding piece 5 and is transferred.
In the case of (b '), the outer folded piece 5 is peeled off along the perforations 13, and both ends of the outer folded piece 5 remain adhered to the inner folded piece 6. After properly taking out the contents in the opened state shown in (b) and (b '), the refolding piece 5 is returned to the original position for resealing, and the engaging piece 10 is lightly inward with a fingertip ( When pushed in and released, the locking pieces 10 are in the states of (c) and (c '), respectively.
Is crossed over the edge 17 of the opening opening and locked, and resealing is completed in a state close to a plane. In this resealed state,
As shown in (c) and (c '), a part of the edge 17 of the opening can be visually observed. As described above, it can be easily locked by pushing the carton front panel slightly outward and pushing the opening 15 indicated by the arrow outward when the front panel of FIG. 4 is pushed downward with the fingertip. Another factor is that the locking piece 10 easily gets over the edge 17 of the opening. The flat re-sealing lid in the re-sealed state (c) or (c ') can be easily re-sealed by lifting the folding piece 5 from the opening 15 to release the above-mentioned locked state. Therefore, it is possible to repeat between (b) and (c), or between (b ') and (c') as shown by double arrows.

The cross section of the locking portion in the locked states (c) and (c ') is shown in FIG. FIG. 5A shows FIG.
FIG. 5B is a sectional view taken along the line AA ′ of FIG.
The BB 'cross section of (c') is shown. In this figure, the difference between the two is only the presence or absence of the opening piece 8, and the locking function does not change. It should be noted in this figure that the locking piece 10, which is a part of the front-side folding piece 5, is located inside the rear-side folding piece 6 at the locking portion. The folding piece 5 is bent at the folding line 11, but the repulsive force that tries to spread to the outside remains in the folding line 11, and the edge 17 of the opening opening and the locking piece 10 hold it so as to hold it down. It is functioning. In order for such an opening / closing and locking mechanism to function with an appropriate force of the fingertip, the elastic coefficient of the carton base material, the locking piece 10
The shape of the tip and the root, the distance between the edge 17 of the opening at the locking position and the tip of the locking piece 10, the folding strength of the base material, and the like must be optimized. Further, in order to facilitate the opening, it is preferable that the folding piece 5 slightly protrudes from the front panel at the opening 15.

(Example) The planar dimensions of the planar re-sealing samples of the first and second examples were set to 21 mm × 60 mm, and the paperboard material was made by Honshu Paper Co., Ltd. It was prepared using 260 g / m ² . In the first embodiment, the opposite sides of the two folded pieces and the central portion of the opening piece were fixed with a polyolefin-based hot melt adhesive. In the second embodiment, the bonding on both sides was omitted. In either case, the first opening can be performed simply by hooking the front folding piece of the opening part with the nail and lifting it lightly, folding the lifted flat re-sealing lid back to the original position, and roughly the center part It was possible to re-seal literally with one touch by pushing it lightly into the carton with the fingertip. Furthermore, the reopening could be easily done by the same operation as at the beginning.

A very wide range of paperboards is available for the flat resealing lid according to the invention. However, when the number of repetitions of opening and closing is large, a special board paper such as a card or ivory is preferable because it is necessary to increase the folding endurance of the locking side 10. Further, a laminated base material obtained by coating a plastic base material on a paper base material can also be sufficiently used. In addition, a polyolefin hot-melt type adhesive is sufficient to bond the two folded pieces constituting the planar re-sealing cover if they are paperboards, but an acrylic resin if they are plastics and paper or plastics. Hot-melt type adhesives are preferred. Printing is performed on the surface of the flat re-sealing lid, but the flat re-sealing lid constitutes a part of the carton, and is a known carton printing method, offset printing, gravure printing, Any of letterpress printing, flexographic printing, silk screen printing and the like may be used.

The flat re-sealing lid according to the present invention retains the function of preventing mischief because the history remains once it is opened. Therefore, the product using the carton with the flat re-sealing cover may be shipped as it is, but if the film is overlapped, the effect of preventing mischief becomes more complete.

[0014]

According to the present invention, if the double panel portion of the carton is a folded piece at least on the outer side, a flat re-sealing lid can be attached so that the carton can be repeatedly opened and closed easily with one touch at any portion. This is effective in the case of a carton in which the contents are taken out little by little and repeatedly opened and closed many times. Also, the range of applicable carton forms is extremely wide, and since it can be applied to conventional cartons, conventional cartoning machines and carton formers can be used as they are. The carton blank adopting the flat re-sealing lid according to the present invention has no insertion flap, and thus approaches a rectangular shape, and the usage efficiency of the paperboard and the punching efficiency are improved. In addition, the carton itself can have an anti-prank effect.

[Brief description of drawings]

FIG. 1 is a development view of a carton blank of a first embodiment of a planar resealing lid.

FIG. 2 is a development view of a carton blank of a second embodiment of the planar resealing lid.

FIG. 3 is a blank assembly diagram of the first and second embodiments.

FIG. 4 is a functional explanatory view of the planar re-sealing lid.

FIG. 5 is a cross-sectional view of the planar resealing lid.

FIG. 6 is a perspective view of another embodiment of the planar resealing lid.

FIG. 7 is an explanatory view of a conventional insertion flap carton.

FIG. 8 is an explanatory view of a conventional carton with resealability.

[Explanation of symbols]

 1 Front Panel 2 Rear Panel 3 Side Panel 4 Glue 5 External Folding Piece 6 Inner Folding Piece 7 Side Flap 8 Opening Piece 9 Locking Piece Notch 10 Locking Piece 11 Folding Line 12 Perforation Line 13 Perforation 14 Perforation 15 Opening Port 16 Opening Part 17 Opening end edge 18 Locking notch 19 Locking part 20 Inserting flap 21 Top plate 22 Inserting piece 23 Inserting slit 24 Swing outlet

Claims (3)

[Claims] 1. In a double flat panel portion of a carton assembled from blanks, at least the front panel is a folding piece, and the front folding piece or one of the front folding pieces to be peeled off from the double flat panel portion. A planar re-sealing lid formed by a back side folding piece or a back side panel facing the section. 2. The carton is resealed by engaging a locking piece provided on the front side folded piece with an edge of an opening opening provided on the back side folded piece or the back side panel. The planar re-sealing lid according to claim 1. 3. The planar resealing lid according to claim 1, wherein the front-side folded piece swings around a fold line provided on an edge of the front-side folded piece as an axis.