JPS6221577Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a packaging container made of a thin sheet made of synthetic resin, such as a pack for chicken eggs, in which the hinge part that integrally connects the pack body and the cover body of the container is cut open. This allows the lid to be opened easily.

As mentioned above, in a container formed from a synthetic resin thin sheet so that the pack body and cover body are integrally connected via a hinge, the pack body and cover body are separated after the contents are put into the pack body. Fold the cover body at the hinge part, cover the pack body, and fix the upper and lower flanges around the cover body and the pack body partially with staples or heat fusion on the side opposite to the hinge part. I am trying to seal it in the same way. In order to open the container, the seal must be broken by grasping the upper and lower flanges with the fingers of both hands. Since the container is pulled with force applied in the opposite direction, there is a risk that the container will fall over and the contents will be scattered as soon as the lid is opened due to the force of the seal breaking. In such cases, the risk would be even greater.

Therefore, as a prior art for making it easier to open the lid of this type of container, Japanese Utility Model Publication No. 52-40992 discloses that perforated cut lines are provided in the flange portions of the pack body and cover body along the hinge portion. , it is proposed to tear along the perforated line. However, if the interval between the score lines is narrowed to make it easier to tear along the perforation-like score line, the score line will be torn during the manufacture or transportation of the container. If the interval between the score lines is increased to prevent tearing, it becomes difficult to open the lid by tearing along the score line, which is a point where the ease of opening the lid conflicts with the decrease in the strength of the container itself. There was a problem.

As a result of various research on how to make this type of container easier to open without reducing the strength of the container itself, the present invention was developed by inserting a cut thin wire such as thread inside the hinge part along this. It is proposed to cut the hinge part by inserting the thin wire body and pulling the thin wire body. That is, by inserting a cut thin wire body inside the hinge part and pulling this thin wire body, the lid can be opened easily without impairing the strength of the container itself as in the prior art, but the above-mentioned In order to tear the hinge part by pulling the thin wire, one end of the thin wire must be fixed to the inside of the hinge part of the container so that the thin wire does not come off during the pulling.

In order to fix the thin wire body for cutting to the inside of the hinge part of the container, since the container is often made of thermoplastic synthetic resin, a fiber thread made of the same synthetic resin as the container is used as the thin wire body. It is conceivable to thermally fuse this to the inside of the hinge part or over the entire length, but with this method, the thin wire body must always be made of the same synthetic resin material as the container, which increases costs. Moreover, during heat fusion, a part of the thin wire becomes flattened and weakened, and there is a risk that it will be torn to pieces while being pulled and cut, so a considerably thick thread must be used. Not only does this lead to an increase in costs, but using thick thread increases the resistance when tearing the hinge part, requiring a considerable amount of force to tear it, especially when the container is made of vinyl chloride. The application of this method was problematic because homogeneous vinyl chloride fibers that can be heat-sealed do not have strong threads.

Therefore, in the present invention, the cut thin wire body disposed along the hinge part of this type of container is formed in a loop shape across the inside and outside of the container, thereby fixing the cut thin wire body to the container itself. The present invention is designed to solve the problem of arranging the cut thin wire body with respect to the hinge portion by attaching the cut thin wire body to the container in a manner that it cannot be removed.

Next, to clarify the present invention based on an example, in the figure, 1 is a container vacuum-formed from a thin sheet of thermoplastic synthetic resin such as vinyl chloride resin or styrene resin into which an antistatic agent has been kneaded. The container 1 consists of a pack body 2 and a cover body 3 integrally molded, and both the pack body 2 and the cover body 3 are provided with flange portions 4, 4 extending substantially horizontally outward from their respective peripheries, and Pack body 2 and cover body 3
and are integrally connected via a hinge part 5 which allows one side flange parts 4, 4 to be bent freely, and after fitting the cover body 3 to the pack body 2, the container 1 is assembled with the hinge part 5. On the opposite side, the upper and lower flange parts 4, 4 are sealed by partially heat-sealing or stapling them at appropriate intervals along a dashed line 7.

Reference numeral 6 denotes a torn fine wire body made of synthetic resin monofilament, multifilament, cotton thread, or thin metal wire. Appropriate locking means are formed at both ends in the longitudinal direction of the portion 5, while the cut thin wire body 6 is formed in a loop shape across the inside and outside of the container 1 at five hinge parts, and the cut thin wire body 6 is The container is configured to be unable to escape from the container 1 without being fixed to the container 1 itself. For example, in the embodiment shown in FIGS. 1 to 3, as shown in FIG.
4 is cut out in a substantially V-shape to form cutout portions 10, 10. Then, the cut thin wire body 6 is arranged inside the container along the longitudinal direction of the hinge part 5, and both ends of the cut thin wire body 6 are connected to the both end notches 10, 10 of the hinge part 5.
The thin wire body 6 is pulled out from the container 1, and both ends of the cut thin wire body 6 are tied together to form nine loops on the outside of the container 1. Thereby, the loop-shaped cut thin wire body 6 is caught in the notches 10, 10, and does not come off from the hinge part 5.

The contents are stored in the container 1 configured as described above, and the upper and lower flange portions 4 on the opposite side of the hinge portion 5,
In order to open the container 1, which has been sealed 7 with staples or heat welding, hold the container 1 with one hand, and as shown in FIG. If you pick an arbitrary part with your other hand and pull it in the direction of arrow A toward the outside of the hinge part 5, the hinge part 5 is sequentially torn from the end face of the notch part 10, and the hinge part 5 is The cover body 3 can be separated from the pack body 2 and opened to take out the contents.

In another embodiment of the present invention, as shown in FIG. A cut thin wire body 6 is provided so as to be inserted into both the cut lines 8, 8'. As a result, when the cut thin wire body 6 is pulled toward the outside of the container along the hinge portion 5, either one of the cut lines 8 or 8' becomes a so-called tear start point where the cut begins easily from that point, and one cut While the hinge portion 5 can be reliably torn with a small force without any excessive force being applied to the tearing thin wire body 6, the loop-shaped tearing thin wire body 6 is inserted into both the cutting lines 8 and 8'. Cut thin wire body 6
does not shift from the hinge part 5.

The present invention can also be applied to a container 1' for eggs as shown in FIG.
At the other end of the hinge portion 5, the flange portions 4, 4 may be cut out along the line shown by the dashed line to form an appropriate V-shaped cutout portion 10.

If the loop-shaped cut thin wire body 6 is inserted into the cutout portion 10 as in the first and third embodiments, the cut thin wire body 6 will not be displaced from the hinge portion 5.

In addition, in order to distinguish the size and type of containers, or to distinguish between containers containing eggs of different sizes, such as egg container 1' shown in Fig. If you change
It is extremely easy to distinguish between containers when packaging and transporting them, and to separate containers with contents stored therein.

In summary, the present invention consists of integrally molding a pack body and a cover body from a synthetic resin thin sheet through a bendable hinge part on one side, and forming the pack body and cover body on the opposite side of the hinge part. In this container, a cut thin wire body disposed along the hinge portion is formed in a loop shape across the inside and outside of the container. Even if the torn thin wire body is not fixed to the container itself, the torn thin wire body will not fall off from the container, and the problem of arranging the torn thin wire body along the hinge portion can be solved.

In this invention, the tearable thin line body is formed in a loop shape so as to surround the inside and outside of the container along the longitudinal direction of the hinge part, and this loop-shaped tearable thin line body is used to tear the hinge part, so the strength of the container itself is not impaired as in the prior art where a perforated cut line is provided along the hinge part, and there is no restriction on the material or thinness of the tearable thin line body as in the case of heat-sealing the tearable thin line body to the inside of the hinge part. Furthermore, the thinner the tearable thin line body is, the easier it is to tear the hinge part, so it is only necessary to select a thin and strong tearable thin line body necessary to tear the hinge part, and using a thin tearable thin line body reduces costs.

Further, by providing cutting lines of appropriate lengths at both ends of the hinge portion and inserting the loop-shaped cutting thin wire body into both of the cutting lines, when the hinge portion is torn with the cutting thin wire body, one of the above cutting lines can be cut. The cut begins from the bottom of the cut line, and the cut line becomes the so-called cut start point, and at this time, no undue force is applied to the cut thin wire body.
There is no fear of cutting during the cutting operation. Furthermore, if a V-shaped notch is provided at one end of the hinge portion in place of the one cutting line, and the loop-shaped cut thin wire body is inserted and wound around the cut line and the notch, the cut thin wire The body does not slip out of the hinge portion, and the cut always starts from the one cut line, which has the effect that the lid can be opened easily and reliably with a small force.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view of the container in an open state, FIG. 2 is a plan view of the container in a closed state, FIG. 3 is a sectional view taken along the line - FIG. 4 is a perspective view showing a torn state, FIG. 5 is a perspective view of a main part showing another embodiment, and FIG. 6 is a perspective view showing the case where it is applied to a container for chicken eggs. DESCRIPTION OF SYMBOLS 1...Container, 1'...Egg container, 2...Pack body, 3...Cover body, 4, 4...Flange part, 5...Hinge part, 6...Tearable thin wire body, 7... Sealing part, 8, 8'... Cutting line, 10, 10... Notch part.

Claims (1)

[Claims for Utility Model Registration] (1) A pack body and a cover body are integrally molded from a thin synthetic resin sheet through a bendable hinge part on one side, and A packaging container configured to seal the pack body and the cover body, wherein a cut thin wire body disposed along the hinge portion is formed in a loop shape across the inside and outside of the container. . (2) Approximately V-shaped notches are provided at both ends of the hinge portion, and the loop-shaped cut thin wire body is arranged so as to be inserted into both the notches. The packaging container according to item 1. (3) According to claim 1 of the utility model registration claim, wherein cut lines of appropriate length are provided at both ends of the hinge part, and the loop-shaped cut thin wire body is arranged so as to be inserted into both the cut lines. Packaging container as described. (4) A cutting line of an appropriate length is provided at one end of the hinge portion, and an appropriate V-shaped notch is provided at the other end, so that the loop-shaped cut thin wire body is inserted into the cutting line and the notch. A packaging container according to claim 1 of the utility model registration claim, which is arranged in a container.