JPH06183437A - Container case of wrapping film - Google Patents

Abstract

PURPOSE:To prevent an unsealing flap from peeling off or detaching in the distribution stage and faciliate removal of the unsealing flap in the utility stage and further, avoid an ugly peeled-off state, by providing elliptic not-varnished spots at the partial joint and semi-circular perforations at the unsealing flap. CONSTITUTION:The partial joint 9 is provided with flat elliptic half-cut lines 16 and a plurality of flat elliptic not-varnished parts having a plurality of non- pierced holes 18 at the inside of the half-cut lines 16, at the position applied with varnish on the surface of front plate 1, as the whole structure. Half-circular scores 15 having a little larger radius of curvature than the half-cut lines 16 are arranged to position the half-circular apertures to one side, at the superposed positions with the half-cut lines 16 of the unsealing flap. The cutting-off line 10 has a shape that a number of J-shaped scores are arranged in series with a short interval, in the vertical direction of the letter-J. Accordingly, the surface of the front plate 1 and the rear of unsealing flap are partially stuck to each other only by not-varnished spots and hence the surface layer of the board is peeled off in the small range of the ellipses by pulling motion of the unsealing flap to cut off the unsealing flap.

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] The present invention relates to a technique for improving a wrap film storage box that is commonly used in general households, food retailers, and the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 4 (A) and 4 (B),
The front plate 1, the bottom plate 2, the rear plate 3, the lid plate 4, the side plate 8, the cover lid piece 5 extending from the cover plate 4 in the direction to cover the front plate 1, and the tip of the cover lid piece 5 are arranged via a cut line 10. The rectangular wrap film storage box whose main part is the opened opening 6 is
No. 8022. Most of this type of box body is made of paperboard, and the part board surface is formed by bending and bending at a substantially right angle at each folding line portion and appropriately pasting. Then, the box body is opened by peeling off the local joint portion 9 where the back surface of the unsealing piece 6 is bonded to the front surface of the front plate 1 and cutting the unsealing piece 6 from the cut line 10. It is also widely known that a necessary amount of the wrap film F is pulled out from the winding film R housed inside and cut by a cutting tool K fixed to the box body. This type of storage box is roughly classified into one having a side cover lid piece 11 extending from the cover plate 4 in a direction covering the side plate 8 and one having no side cover lid piece 11. The mounting position of the cutting tool K is as follows. In many cases, it is a plate surface in the vicinity of the ridge between the front plate 1 and the front plate 1, the upper end of the front plate 1, and the tip of the cover lid piece.
As the overall shape of the cutting tool (shape of a virtual line connecting the cutting edges), a straight shape, a concave arc shape, a convex arc shape, a V-shaped projection shape, a trapezoidal projection shape, and the like are known. The blades are known to be made of metal, plastic, paper, vulcanized hardened paper, etc., whose edges are saw-toothed, abrasive coated, or a combination of both. There is. Figure 4
(A), (B) is a box body without a side cover lid piece 11 extending in a direction covering the side plate 8 from the cover plate 4, the cutting tool has a straight shape (the shape of a virtual line connecting the cutting edges) is straight. Shaped metal saw blade K
2 illustrates a storage box in which the caulking claws 12 are caulked and fixed to the back surface side of the tip edge portion of the covering lid piece 5.

[0003]

Recently, in response to market (consumer) demands placed on this kind of storage box, the front plate 1 of the opening piece 6 is opened.
The peeling strength of the unsealed piece is increased so that the unsealed piece does not come off or come off in the distribution stage up to the consumer, and the unsealed piece 6 can be easily removed in the practical stage of the consumer.
Moreover, there is a conflicting requirement that the appearance quality of the box should be maintained and that the unsightly peeled state should not occur. It is an object of the present invention to provide a wrap film storage box having an opening piece that simultaneously satisfies these two contradictory requirements.

[0004]

According to the present invention, a raffilm storage box is extended from a front plate 1, a bottom plate 2, a rear plate 3, a cover plate 4, a side plate 8 and a cover plate 4 in a direction to cover the front plate 1. A rectangular box body having a cover lid piece (5) and an opening piece (6) arranged at the tip of the covering lid piece (5) through a cutoff line (10) as a main part, wherein the back surface of the opening piece (6) is attached to the front surface of the front plate (1). The box body is opened by peeling off the local joint portion 9 where it is fitted and by cutting the opening piece 6 from the cut line 10, and pulling out the necessary amount of the wrap film stored inside to form the box body. In the storage box of the wrap film used by cutting with the fixed cutting tool K, the entire structure of the local joint portion 9 has a flat elliptical half-cut line 16 in the varnish coating portion on the surface of the front plate 1. , A flattened ellipse with a plurality of non-through holes 18 inside the half-cut line 16 There is a Jo non varnishing unit 17,
A semicircular cut 15 having a slightly larger radius of curvature than the half cut line 16 is arranged at a position on the unsealing piece 6 where the half cut line 16 overlaps with the semicircular opening aligned on one side. On the other hand, the cut-off line 10 has a shape in which a large number of J-shaped cuts 10 'are arranged in series in the vertical direction with a slight interval therebetween. The present invention will be described using.

FIGS. 1, 2 and 3 show an embodiment of the present invention. FIG. 1 (A) is a perspective view of an opened storage box, and FIG. 1 (B) is FIG. 1 (A). 2 is a developed plan view showing the structure of the paperboard which becomes the storage box of FIG. 2, FIG. 2 is a schematic view showing the local joints 9 scattered on the front plate 1 in FIG. 1B, and FIG.
(B) A cutting line 10 between the covering piece 5 and the unsealing piece 6 in FIG.
FIG. 3 is a schematic diagram showing half-moon shaped cuts 15 scattered on the unsealing piece 6.

1A and 1B, the storage box of the present invention has a front plate 1, a bottom plate 2, a rear plate 3, a cover plate 4, a side plate 8, and a direction in which the cover plate 4 covers the front plate 1. It is a rectangular box body whose main part is the cover lid piece 5 extended to the side, and has a side cover lid piece 11 extending from the cover plate 4 in a direction to cover the side plate 8, and the cover lid piece 5
Straight metal saw blade (cutting tool) K on the back side of the tip edge of the
Exemplifies a storage box fixed by crimping with crimping claws 12. Also in this storage box, the cut-out line 1 is formed while pulling up the local joint portion 9 that bonds the back surface of the unsealing piece 6 and the front surface of the front plate 1.
A wrapping film storage box which is opened by removing the unsealing piece 6 from 0, draws out the necessary amount of the winding film R stored inside, and is cut by the metal saw blade K fixed to the covering lid piece to be used. It is made by bending and pasting a paperboard mount similar to the conventional product. In FIG. 1B, the presence of the auxiliary side plates 7, 7 ′, the auxiliary side cover lid piece 13, and the folding piece 14 is also shown. The above description is common to the conventional product.

The present invention is different from the conventional ones: 1) The entire structure of the local joint portion 9 has a flattened elliptical half-cut line 16 in the varnish coating portion on the surface of the front plate 1 and its There is a flattened elliptical non-varnish coating part 17 in the state of having a plurality of non-through holes 18 inside the half cut line 16, and at the position in the unsealing piece 6 where it overlaps with the half cut line 16. , The semicircular cut 15 having a slightly larger radius of curvature than the semicut line 16 is arranged with the semicircular opening aligned on one side, 2) the cutoff line 10 is J-shaped A large number of the cuts 10 'are shaped such that the J-shapes are arranged in series in the vertical direction with a slight spacing.

First, the above 1) will be explained. Generally, the surface of the front plate 1 on which the local joints 9 are scattered is generally a non-varnish coating portion 17, that is, the entire surface excluding the portion which remains the surface of the paperboard material. I have a tear. This role is to make the application process of the adhesive for local bonding easy and economical,
For example, when an adhesive is applied to the front surface of the front plate 1 where the local joints 9 are scattered and the adhesive is applied to the back surface of the unsealing piece 6, the adhesive effect of the varnish application processed portion is about the role of temporary fixing. Therefore, the non-varnish coating portion 17 is firmly bonded. In other words, the bonding structure at the local joint is
With the half-cut line 16 on the front plate 1 and the semicircular cut 15 on the unsealing piece overlapping, the surface of the front plate and the unsealing piece only at the portion of the non-varnish application part 17 located inside the half-cut line 16 The back side of the will be in a locally bonded state. And by destroying this local bonding part by pulling up the opening piece,
The surface layer peeling of the paperboard is positively caused in the small area of the elliptical shape surrounded by the half cut line 16 on the front plate side, and the layer peeling of the unsealed piece paperboard on the unsealed piece side is blocked by the semicircular cut 15. prevent.
By the action of both of them, the local joint portion is made to be in a state in which it can be destroyed only by the local delamination of the front paperboard surface.

In FIG. 2, which shows the front plate 1 in an enlarged manner, the non-varnish coating portion 17 and the half-cut line 16 surrounding the outer portion in the present invention are both flattened elliptical shapes. The reason for this is rather in harmony with the shape required for the non-varnish coating part 17 side, which is suitable for maintaining the bonding strength and for ensuring the local delamination of the paperboard surface. That is, when the adhesive strength of the adhesive is constant, it is common to think that the retention of the bonding strength is "arbitrary in the relation of the area of one piece x the number of arrangements", but when it is attempted to control the peeling of the board, Therefore, each non-varnish coating part 17 needs a large area. Then, in order to effectively utilize the amount of adhesive applied in a strip shape, it is beneficial to make the flattened elliptical shape. Further, in order to facilitate concentration of stress at the time of peeling, it is desirable to form a rugby ball-like elliptical shape with a protruding tip. At this time, the area of each non-varnish coating part 17 is preferably about 20 to 80 mm ² , and more preferably 3
0 to 70 mm ² , the radius of curvature of the protruding tip is 0.4 to
It is desirable that the elliptical shape is 0.9 mm, and the maximum value of the minor axis is 3 to 6 mm. The half-cut line 16 surrounding the outside of the non-varnish coating portion 17 may have a shape similar to the shape of the non-varnish coating portion arranged, and the radius of curvature of the protruding tip portion is 1.4 to 1.8 mm. It is preferable that the maximum value of the minor axis is in the range of 6 to 9 mm and has a rugby ball-like elliptical shape. It is important that the half cut line 16 that surrounds the outside and the non-varnish coating part 17 on the inside be arranged in a size of 0.5 to 1.5 m between the protruding tip parts of both.
It is desirable to place them at intervals of m. The reason for this is
The purpose of this is to prevent the layer separation of the paperboard generated in the non-varnish coating part 17 from becoming shallower and prevent the layer separation from being propagated outside the half-cut line 16. And this non-varnish coating part 17
A plurality of non-through holes 18 are arranged inside the. The role of the non-through holes 18 is to increase the bonding force by appropriately impregnating the paperboard with the adhesive attached to the non-varnish coating portion 17 and by expressing the anchoring effect. Therefore, it is more effective to dispose a large number, and local layer peeling from the non-varnish coating portion 17 is likely to occur, which is desirable. The arrangement of the non-through holes 18 is
It is desirable to arrange 4 to 12 pieces in a straight line shape or a cross shape in the longitudinal direction of the width center portion of the non-varnish coating portion 17. This is a device for increasing the sealing strength due to the increased bonding force, but stresses are concentrated when pulling up and it is easy to turn up. On the other hand, a semi-circular cut 1 on the side of the unsealing piece 6 shown enlarged in FIG.
5 may be a half-moon shaped break which is an opening larger than the value of the short diameter of the half-cut line 16 on the front plate 1 side, and the curvature radius is preferably 1.5 to 3 mm. Semicircular cut 1
5 is formed by a cut line from the front surface to the back surface of the paperboard, and the cutting direction is aligned with the direction in which the half-moon shaped opening is received, and is arranged at a position overlapping the half-cut line 16 on the front plate side. This role is
This is for preventing the unsealed piece from being partially torn due to the layer separation of the unsealed piece side paper board. The number of local joints 9 scattered in the longitudinal direction of the box is 3 to 10, and the number increases depending on the length of the box, but it is desirable to dispose them at a center-to-center distance of 4 to 6 cm.

The adhesive used for the local joint 9 has a coating amount value of 0.05 to 0.2 remaining on the surface of the paperboard.
In g / cm ² following coating amount, average peel strength of the local joint desirably those above 100 to 1500 g / cm ² range, applying this to the front plate side. The reason for this is to reduce the probability that the solidified adhesive will transfer to the unsealed piece side, and to prevent the thick adhesive layer from being formed even if the adhesive transfers to the unsealed piece side. The unsealed piece to which the thick adhesive layer is fixed has increased rigidity, and the bending caused when the adhesive layer is folded causes the adhesive layer to break, which causes the paperboard to delaminate. As the adhesive from this viewpoint, for example, an aqueous solution type adhesive represented by vinyl acetate emulsion, a water dispersion type adhesive represented by gelatin or starch, a solvent solution type adhesive represented by rubber,
Any of the heat-melt adhesive type adhesives containing olefin, ester, amide type resin as a main component, cyanoacrylate, and chemical reaction hardening type adhesive agents represented by urethane type can be used, among which drying / solidifying time is short. In consideration of the advantages that can be achieved, it is desirable to use a hot melt adhesive, that is, a hot melt adhesive. In order to reduce the peeling of the paperboard layer of the unsealed piece, it is desirable that the paper grain of the paperboard is a vertical grain which is orthogonal to the longitudinal direction of the box.

Next, as shown in FIG. 3, the cut-off line 10 of the above 2) is such that a large number of J-shaped cuts 10 'having long legs are arranged in series in the vertical direction with slight intervals. It has a shape. This role is to easily and surely cut the unsealing piece from the covering piece when the above-mentioned destruction of the local joint is promoted. That is, it is cut by breaking the part connected at the interval between the J-shaped cuts 10 '. Therefore, this slight interval is set in the range of 0.5 to 4 mm. A feature of the present invention is that the space is between the tip of the J-shape and the width of the J-shape, and the remaining portion of the torn paper bites into the side of the foot. Therefore, as shown in FIG. 3, when the saw blade is fixed to the tip of the cover lid piece, the J-shaped cut 1O ′ is arranged in the direction in which the tip of the J-shape is directed toward the cover lid side, and If one side of the J-shape is set so as to reach between the fixed positions of the crimping claws, the cutting at the cutting line 10 becomes much easier, and the remaining portion of the torn paper is the protruding teeth of the saw blade. It has the advantage that it stays in the valleys of the peaks, has an excellent appearance, and does not deteriorate the cutting performance of the saw blade.

As described above, the present invention is most effective in a storage box in which a saw blade is caulked and fixed to the tip of the covering lid piece, but the basis of the present invention is to securely fix and remove the opening piece of the storage box. To do it. Therefore, the present invention can be applied to all storage boxes that use this kind of unsealing piece as the unsealing means, irrespective of the type of storage box, the material of the cutting blade, the overall shape of the cutting blade, and the mounting position.

The paperboard used in the present invention has a thickness of 0.35.
About 1.5 mm thick paper, generally thicker
A strong and strong box can be obtained, but bending is difficult, so the thickness is usually 0.35 to 0.8 (310 by weighing.
A relatively thin paperboard in the range of ˜550 g / m 2 is used.

[0014]

[Example] Meat thickness of about 0.5 mm (weighing 400 g / m ² ).
Using the cardboard of No. 1 as a base material and using a commonly known method, FIG.
As shown in (B), a board mount for a storage box having a box length of about 31 Omm, in which a saw blade K is fixed by a crimping claw 12 on the back surface of the tip of the cover lid piece, is prepared and bent by a known method. -Pasted to form a box containing the winding wrap film R. FIG. 1 (A) is a diagram when the unsealed piece 6 of the obtained box body is removed to bring it into an unsealed state. As shown in FIGS. 2 and 3, the basic difference of the mount in this case is as shown in FIG. 2 and FIG. 3) 1) The entire structure of the local joint 9 is flat on the varnish coating part on the front plate 1 surface. And a flattened elliptical non-varnish coating part 17 having a plurality of non-through holes 18 inside the half-cut line 16.
A semicircular cut 15 having a slightly larger radius of curvature than the half cut line 16 is located at a position on the unsealing piece 6 where the half cut line 16 overlaps with the semicircular opening (direction to receive the curl). That they are arranged side by side (6 local junction parts 9 are arranged in the longitudinal direction with a center distance of about 54 mm), and 2) the cutoff line 10 has a J-shaped cut 1O ′. A large number of them have a shape in which J-characters are arranged in series in the vertical direction with a slight interval.

The adhesive for forming the local joint portion 9 is a heat-melt adhesive type adhesive [trade name: Jet Melt 3762].
-AE: manufactured by Sumitomo 3M Co., Ltd.] was used to adjust the coating amount remaining on the surface of the paperboard to about 0.15 g / cm 2. As a comparative product, only the part 1) and 2) above is a commercially available saran wrap (polyvinylidene chloride film, manufactured by Asahi Kasei Kogyo Co., Ltd.) storage box (box length of about 31 Omm), that is, front plate 1 Has a circular half-cut line 16 with a diameter of 10 mm, and a non-through hole 18 inside the half-cut line 16.
Eight local joints 9 consisting of a circular non-varnish coating portion 17 having a diameter of 7 mm and having a center distance of about 35 mm are arranged in the longitudinal direction at a position in the opening piece 6 where the half cut line 16 is overlapped. , A semicircular cut 15 having the same radius of curvature as the semi-cut line 16 is formed by arranging the semicircular opening toward one side (direction for receiving the curl), while the cut line 1
The number 0 was changed to the specification that a large number of T-shaped cuts 10 'were formed by arranging T-shapes in series in the vertical direction with a slight interval.

2000 boxes of each of them were made, and transportation between Suzuka and Tokyo was repeated 3 times in a comparable state. After that, the opened piece was sealed, the opened piece was easily flipped over, and the opened piece was joined. The external appearance quality of the part and the cutting performance of the saw blade were evaluated. The results are shown below. Evaluation content Inventive product Comparative product 1. Number of boxes with unsealed pieces opened during the transportation process ... 0 3 2. Number of boxes in which tear pieces were torn off during opening ・ ・ ・ 0 16 3. 3. Number of boxes in which peeling pieces of paperboard adhere to the local joints after opening beyond the half-cut line 16 enclosure ... 0 185 4. The number of boxes in which the paperboard peeling inside the half-cut line 16 exceeds the area surrounded by the half-cut line 16 ..... Number of boxes in which saw blade cutting performance deteriorates due to the remaining part of the tearing of the cutting line ... 0 43 6. 6. The overall feel of the openability of the comparative product is smooth and easy to remove along the tear line of the open piece. The box quality of the comparative product after opening is clean, with no adhesive or paper pieces attached to the local joints of the box.

[0017]

According to the storage box of the present invention, the opening / closing piece does not peel off / separate in the distribution stage up to the consumer, and the opening / closing piece 6 can be easily removed in the practical stage of the consumer. It does not result in an unsightly peeled state (a state in which the appearance quality of the box is maintained).

[Brief description of drawings]

FIG. 1 is a diagram of an embodiment of the present invention, (A) is a schematic perspective view showing a state after a storage box is formed, and (B) is a schematic plan view showing the shape of a paperboard that becomes the storage box.

FIG. 2 is a diagram of an embodiment of the present invention and is a partial schematic view showing a local joint portion of a front plate.

FIG. 3 is a diagram of an embodiment of the present invention and is a partial schematic diagram showing a cut line and a half-moon-shaped cut.

FIG. 4 is a schematic perspective view showing a conventional product storage box and a state when the box is opened.

[Explanation of symbols] 1 front plate 2 bottom plate 3 rear plate 4 lid plate 5 cover lid piece 6 opening piece 7, 7'auxiliary side plate 8 side plate 9 local joint 10 cutting line 11 side cover lid piece 12 caulking claw 13 auxiliary side cover lid Piece 14 Folding piece 15 Half-moon shaped cut 16 Flattened elliptical half-cut line 17 Non-varnished part 18 Non-through hole group K Metal saw blade (cutting tool) R Winding film F Film

Claims (1)

[Claims] 1. A front plate 1, a bottom plate 2, a rear plate 3, a cover plate 4, a side plate 8, a cover lid piece 5 extending from the cover plate 4 in a direction to cover the front plate 1, and a cutting line at the tip of the cover lid piece 5. It is a rectangular box body whose main part is an unsealing piece 6 arranged via 10, and the local joint portion 9 where the back surface of the unsealing piece 6 is bonded to the surface of the front plate 1 is peeled off. The box body is opened by cutting off the unsealing piece 6 from the cutting line 10, the necessary amount of the wrap film F stored inside is pulled out, and the cutting tool K fixed to the box body is used. In the storage box of the wrap film, the entire structure of the local joint portion 9 has a flat elliptical half-cut line 16 in the varnish coating portion on the surface of the front plate 1 and a plurality of inside half-cut lines 16. There is a flattened elliptical non-varnish coating part 17 having a non-through hole 18, A semicircular cut 15 having a slightly larger radius of curvature than the semicut line 16 is arranged at a position where the semicut line 16 overlaps with the semicircular opening being aligned on one side. The cut-off line 10 is a wrap film storage box characterized in that a large number of J-shaped cuts 10 'are arranged in series in the vertical direction at a slight interval.