JPH07267275A - Pack container - Google Patents

Abstract

PURPOSE:To embody the low-cost production and easy and safe opening from a part near the ends of half-cut lines and along the half-cut lines, by making the half-cut lines in the edges of outward projections and along the inside of the part where the edges of the outward projections are joined. CONSTITUTION:A pair of half-cut lines 6.6 upper and lower, are made along the inside of a hinge part 3, that is, the part where the edge 7.7 of the outward projection of a containing body 1 and the edge 7.7 of the outward projection of a cover 2 are joined together. The half-cut lines 6.6 serve as the folding lines of the hinge part 3 as well. In the state of the pack container sealed by folding the container into two from the hinge part, its upper part exactly over its lower part, the hinge part 3 is folded along the half-cut lines 6.6 and the part where the edges 7.7 of the outward projections, opposite the hinge part 3, are superimposed is sealed by heat seal 9 for joining. To open the container, a part 3A between the half-cut lines 6 of the hinge part 3 is pulled outward from a notch 8, and the hinge part 3 can be opened along the half-cut lines 6.6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a disposable product that is often used in the sale of foods, such as eggs, vegetables, fruits, processed foods such as pickles and boiled vegetables, side dishes, bento, and Japanese sweets such as steamed buns and dumplings. The present invention relates to a packaging container made of a rigid or semi-rigid synthetic resin sheet, particularly with a lid.

[0002]

2. Description of the Related Art This type of packaging container with a lid is of a type in which the body and the lid are connected by a hinge portion along one side of the container to open and close, and a type in which the body and the lid are separated. There are things.

Further, in order to simplify the molding of the container and to facilitate the sealing of the lid after the articles such as foods are put therein, the outer edges of the body and the lid are provided with overlapping edges.
In the former hinge type, the projecting edge on the opposite side of the hinge portion is joined and sealed. Further, in the latter separation type, it is general that the entire circumference of the projecting edge, at least two corresponding sides, are joined and sealed.

Adhesive tape and stapling are used as the joining and sealing means, but they are not efficient and are not appropriate in terms of hygiene and safety. Therefore, heat sealing is widely used for food packaging containers. Has been done. While heat-sealing is not only efficient but hygienic, it is often difficult for consumers to open the lid because the protruding edges are firmly joined together. There was a particular problem in the case of a container packed with fragile items such as eggs or items that are opened and eaten as they are such as Tsukudani or pickles.

Therefore, in order to make it easier for the consumer to open the lid, threads are attached along the inside of the hinge portion, or as shown in FIG. 7, the threads 104 are placed inside and outside the hinge portion 103 connecting the body 101 and the lid 102. A device in which the hinge portion 103 is torn by being hung around and pulling the thread 104 outward (hereinafter referred to as a thread cutting and opening means), and as shown in FIG. 8, along both sides of the hinge center line of the hinge portion 103. The two perforations 105 are formed in parallel with each other, and the hinge portion 103 is separated from the perforations 105 by pinching the ends of the hinge portions 103 and pulling them outward (hereinafter referred to as perforation opening means). It became so.

[0006]

However, in the packaging container provided with the above-mentioned thread cutting and opening means, the thread attaching step after the container is formed, the step of tying up the thread 104 wound around as illustrated in FIG. 7, etc. Because the production efficiency of the container is poor,
There has been a problem that the cost is increased in combination with the use of the thread in addition to the synthetic resin as the material.

In the case of a packaging container having a perforation opening means, although there is not much cost problem, when the hinge portion 103 is separated from the perforation 105 and opened as shown in FIG. 8, the separated body 101 and lid are separated. Since the perforation marks 105A are left as sharp serrated projections on the edge of the perforation 102, there is a risk of touching the perforation marks 105A with a finger to be injured.

The present invention has been proposed in view of the above problems in conventional packaging containers, and it is an object of the present invention to provide a packaging container which can be manufactured at low cost, can be easily opened, and is excellent in safety. To aim.

In order to achieve the above-mentioned object, the present invention closes the body and the lid so that the protruding edges of the outer peripheral portion overlap each other, and joins the overlapping portions of the protruding edges to seal the lid. The packaging container is characterized in that a half-cut line is provided on the projecting edge along the inside of the projecting edge joining portion. Further, it is characterized in that a tear start notch reaching the half cut line is formed from the edge of the projecting edge.

[0009]

[Function] When the half-cut line of the closed overhanging edge is torn from near the end of the half-cut line along the half-cut line, the overhanging edge is cut from the half-cut line. You can open it.
No protrusions after the half-cut line is cut.

[0010]

Embodiments of the packaging container of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a developed state of a so-called egg pack embodying the present invention, in which a body 1 and a lid 2 both having a rectangular shape in plan view are integrally integrated in series through a hinge portion 3 along the facing long side portions. A plurality of recesses 4 and 5 are formed symmetrically in the body 1 and the lid 2 into which eggs are individually inserted. Further, two half cut lines 6 are formed in parallel along both sides of the center line Y-Y of the hinge portion 3 in which the projecting edges are joined to each other in advance.

The ends of the half-cut lines 6 and 6 extend to the end edges of the projecting edges 7, and tear notches 8 are formed at both ends of each half-cut line 6 and 6. The notch 8 may be formed only at one end of the half cut line 6. The half cut lines 6 in this embodiment also serve as the bending line of the hinge portion 3.

FIG. 2 is a perspective view showing a sealed state in which the packaging container of FIG. 1 is folded from the hinge portion 3 in a palm-like shape, and the hinge portion 3 is folded along the half cut lines 6 and 6. A portion where the protruding edges 6 on the opposite side overlap each other is joined and sealed by a heat seal 9. At the time of unsealing, the portion sandwiched by the half-cut lines 6 and 6 of the hinge portion 3 from the notch 8 is pulled outward as indicated by reference numeral 3A, so that the hinge portion 3 is cut into half-cut lines 6. Can be split along 6

The raw materials used for molding the packaging containers 1 and 2 are high-impact polystyrene (HiPS),
There are synthetic resins such as styrene-butadiene copolymer or their mixed resin, OPS, amorphous polyethylene terephthalate (A-PET), vinyl chloride (PVC), polyethylene, polypropylene, polycarbonate, etc., but the raw material cost, molding of the container and hinge part Considering the ease of making and opening, etc., OPS, A
-PET, PVC etc. are particularly suitable. The figure shows an example of a container for egg packaging, but it can be applied to various other food containers.

The position at which the half-cut line is formed is essentially a portion along the inside of the hinge portion or the heat-sealed portion, that is, the portion where the protruding edges are joined to each other,
Further, the half-cut lines are formed symmetrically in the vertical direction on the overlapping protruding edges, or two half-cut lines are formed parallel to the protruding edges on the lid side.

FIG. 3A is an enlarged cross-sectional view of the hinge portion in the embodiment of FIG. 2 and shows the hinge portion 3, that is, the body 1 and the lid 2.
A pair of upper and lower half-cut lines 6 and 6 are formed along the inner side of the portion where the projecting edges 7 and 7 are connected to each other. The half cut lines 6, 6 also serve as the bending line of the hinge portion 3 as described above. It is separated from the half-cut lines 6 and 6 as shown by the chain line 3A.

3 (B) and 3 (C) show an example in which the hinge portion 3 is formed in a cross-section Ω shape so that it can be easily opened and closed, and the half-cut line is shown in FIG. 3 (B). 6 and 6 are formed symmetrically on the Ω-shaped cylindrical surface. In FIG. 3 (C), the protruding edges 7 and 7 inside the Ω-shaped portion are formed symmetrically in the vertical direction where they overlap each other. The chain lines 3B and 3C represent the separated parts of the hinge part 3.

In FIG. 4, two half cut lines 6 are formed in parallel along the inside of the hinge portion 3 on the protruding edge 7 on the lid 2 side. In this case, two half-cut lines 6
The portion sandwiched by 6 is cut off as shown by a chain line 7A.

5 (A) and 5 (B), the half-cut lines 6 and 6 are projected to heat the edges 7 and 7 regardless of whether they are hinged openable type or body and lid are separate. It is formed along the inside of the sealing point 9. Figure 5 (A)
In the case of, the half-cut lines 6 and 6 are vertically symmetrical where the projecting edges 7 and 7 overlap each other, and in the case of FIG. 5B, the half-cut lines 6 and 6 are projecting edges on the lid 2 side. Two pieces are formed in parallel on each of the seven. Chain lines 7B and 7
C represents the separated portion of the overhang edge 7.
The lid 2 can be opened by cutting off the protruding edge sealing portion.

FIG. 6 shows the heat-sealed portion 9 of the projecting edge 7.
Another example of the half-cut line along the above is shown in FIG.
As described above, the half-cut line 6 formed vertically symmetrical along the inside of the heat-sealed portion 9 and the half-cut line 10 formed vertically symmetrically are parallel to each other between the heat-sealed portion 9. No notch is provided at the end of the outer half-cut line 10.

When opening, the inner half-cut line 6 is torn from the notch 8, but there are times when the rift may deviate, and the rift should be directed toward the periphery rather than toward the inside of the container. If there is a half-cut line 10 outside the original half-cut line 6 as in the embodiment of FIG. 6, the crevice can be transferred to the outer half-cut line 10 and continuously torn. .

[0021]

EFFECTS OF THE INVENTION The packaging container according to the present invention is a packaging container in which the body and the lid are closed so that the overhanging edges of the outer peripheral portion overlap each other, and the overlapping portions of the overhanging edges are joined together to seal. Since half-cut lines are put on the projecting edges along the inside of the joint, even if the projecting edges are tightly sealed by heat sealing, etc., they can be easily torn and opened from the half-cut lines and the conventional perforation It is safe because no sharp protrusions are formed after being cut like a container equipped with an opening means. Further, since the notch that reaches the half-cut line from the edge of the overhanging edge is formed at the end of the half-cut line, the operation to start tearing is easy. Further, unlike the conventional container provided with the thread cutting and opening means, it is not necessary to add a step different from the molding of the container when manufacturing the container, and it is suitable for mass production and can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a plan view of a packaging container of the present invention in a developed state.

FIG. 2 is a perspective view of the packaging container of the present invention in a state in which the lid is sealed and sealed.

FIG. 3 is an enlarged cross-sectional view showing three examples of how to form a half-cut line in a hinge portion.

FIG. 4 is an enlarged cross-sectional view showing another way of forming a half cut line in a hinge portion.

FIG. 5 is an enlarged cross-sectional view showing two examples of how to form a half-cut line at a protruding edge joint.

[Explanation of symbols]

 1 Body 2 Lid 3 Hinge part 4.5 Concave part 6 10 Half-cut line 7 Overhanging edge 8 Notch 9 Heat seal

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 14, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a plan view of a packaging container of the present invention in a developed state.

FIG. 2 is a perspective view of the packaging container of the present invention in a state in which the lid is sealed and sealed.

FIG. 3 is an enlarged cross-sectional view showing three examples of how to form a half-cut line in a hinge portion.

FIG. 4 is an enlarged cross-sectional view showing another way of forming a half cut line in a hinge portion.

FIG. 5 is an enlarged cross-sectional view showing two examples of how to form a half-cut line at a protruding edge joint.

[FIG. 6] Another implementation of a half-cut line at a protruding edge joint
The top view which shows an example.

FIG. 7 is an oblique view of a conventional packaging container having a thread cutting and opening means.
View.

FIG. 8 shows a conventional packaging container having a perforation opening means.
Perspective view.

[Explanation of symbols] 1 Body 2 Lid 3 Hinge part 4.5 Recess 6/10 Half-cut line 7 Overhanging edge 8 Notch 9 Heat seal

Claims (9)

[Claims] 1. A packaging container in which a body and a lid are closed so that the projecting edges of the outer peripheral portions overlap each other, and the overlapping portions of the projecting edges are joined to seal the projecting edge along the inside of the projecting edge joining portion. A packaging container characterized by having a half-cut line on the inside. 2. The packaging container according to claim 1, wherein the half-cut line is formed substantially vertically symmetrically on each overlapping edge. 3. The packaging container according to claim 1, wherein two half-cut lines are formed in parallel with each other at least on the lid-side protruding edge of the overlapping protruding edges. 4. A half-cut line in the case where the container is rectangular, and the body and the lid are connected by a hinge portion along one side of the container, and the protruding edge on the side corresponding to the hinge portion is joined and sealed. The container for packaging according to claim 1, wherein the container is located on the hinge portion side of the projecting edge. 5. A half-cut line in the case where the container is rectangular and the body and the lid are connected by a hinge part along one side of the container and the protruding edge on the side corresponding to the hinge part is joined and sealed. 2. The packaging container according to claim 1, wherein the package is on the side of the joint sealing side of the projecting edge corresponding to the hinge portion. 6. A half-cut line in the case where the container is rectangular, and the body and the lid are connected by a hinge portion along one side of the container and the protruding edge on the side corresponding to the hinge portion is joined and sealed. 2. The packaging container according to claim 1, wherein the container is located on the hinge portion side of the projecting edge and on the joint sealing side of the projecting edge corresponding to the hinge portion. 7. In the case of a container in which the body and the lid are separate bodies and the overlapping portions of the projecting edges are joined together over the entire circumference for sealing, the half-cut line is provided over the entire circumference of the projecting edge. The packaging container according to 1. 8. The packaging container according to claim 1, wherein a tear initiation notch reaching the half-cut line from the edge of the projecting edge is formed. 9. The packaging container according to claim 2, wherein the half-cut lines are arranged in two rows in parallel, and the inner half-cut line has a tear start notch that reaches the half-cut line from the edge of the projecting edge. A packaging container characterized by being formed.