JP3241534B2 - Overcap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fitting cover (overcap) designed to prevent external mischief of a can container such as dry milk.

[0002]

2. Description of the Related Art Conventionally, relatively large-diameter cans used for food containers such as dry milk, powdered coffee, tea, seaweed, sprinkle, etc., are provided with a fitting lid, a so-called overcap. It is used to prevent infiltration and adhesion of moisture, odor, etc. to the contents afterwards. This overcap is usually manufactured by injection molding polyethylene.

[0003] As shown in FIG. 2, the shape of the disk 1 is a substantially flat disk 1, and a ring-shaped skirt 2 extending downward is formed at the edge of the disk 1. Inside 2, a groove 4 is formed along the shape of the can winding portion 6. Since the lower end of the groove portion has an inner diameter smaller than the maximum diameter of the tightening portion at the upper end of the can, when the overcap is lightly pressed, the overcap fits over the tightening portion of the can. Then, if the fingertip is hung on the lower end of the skirt portion of the overcap and lifted, the lower end of the groove portion can be relatively easily removed beyond the fastening portion because the material is flexible. The can is provided with a ring-shaped bead (annular groove) 10 below the fastening portion 6 for reinforcement.

[0004] Further, the ring-shaped skirt portion includes a first skirt portion extending downward from an edge portion of the disk body,
An overcap, comprising a second skirt portion extended below the first skirt portion and having a ring-shaped cut-out portion provided between the first skirt portion and the second skirt portion, is also practical. Has been Such an overcap is opened by cutting off the second skirt portion from the ring-shaped cutout portion when opening, and then used as usual.

[0005]

However, the conventional overcap is designed so that it can be removed relatively easily by hooking a fingertip on the lower end of the skirt and lifting it up. There is a risk of mischief by prying open the lid or mixing foreign matter from the outside, and measures against such mischief have been demanded.

The above-described overcap provided with the ring-shaped cutout has the advantage that the unopened state and the unopened state can be easily distinguished, but the material is flexible and the cutout is destroyed. It was not effective as a countermeasure against mischief because it could be easily removed or fitted.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a disk-shaped lid body and an edge portion of the lid body in order to prevent mischief of the product. An overcap comprising a first skirt portion extended downward and provided with a groove along the outer shape of the can cinching portion on the inside, and a second skirt portion extended below the first skirt portion It is an object of the present invention to provide an overcap in which a protruding portion is provided inside the second skirt portion along the outer shape of the groove-shaped bead of the can when fitted.

[0008]

[Function] Since the skirt portion is double-engaged with the outer peripheral portion (can upper end portion) near the can opening, it is difficult to remove the overcap. In the overcap in which the skirt portion is formed so that the groove bead is completely covered, in addition to the above-described double engagement, the fingertip is less likely to enter a gap between the overcap and the groove bead, so it is difficult to remove the overcap. It becomes even more difficult. Further, the skirt portion covers almost the entire groove bead from the outside, and the outer diameter of the lower end portion of the skirt portion is substantially equal to the outer diameter of the can at the lower end of the groove bead (that is, the outer peripheral surface of the lower end portion of the skirt portion has a groove shape). In the case of the overcap in which the outer peripheral surface of the bead lower end is substantially flush, the fingertip cannot slide on the lower end of the overcap and slips. Therefore, since it is difficult to remove the overcap, mischief from the outside can be prevented.

Further, since the can and the overcap are doubly engaged (substantially in contact with each other), the sealing performance is improved, and the penetration and adhesion of moisture, odor, etc. can be effectively prevented. .

The present invention can be combined with a conventional overcap provided with the above-mentioned ring-shaped cutout portion. In such a configuration, the skirt portion can be cut by pulling the peeling start piece connected to the second skirt portion, and after the cut, the first skirt portion remains and can be easily opened like a normal overcap. Can be closed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an overcap according to the present invention will be described below.

As shown in FIG. 1 (and FIG. 2), the shape and structure of the overcap according to the present invention include a substantially flat lid body 1 made of an LDPE (low density polyethylene) material. The lid body 1 includes a ring-shaped first skirt portion 2 extending downward at an edge of the lid body 1 and a second skirt portion 3 extending further downward from the first skirt portion. A groove 4 is formed inside the first skirt portion 2 along the shape of the can-tightened portion. The lower end of the groove 4 has an inner diameter smaller than the maximum outer diameter of the tightening portion 6 at the upper end of the can 5. Between the first skirt portion 2 and the second skirt portion 3, there is provided a thin portion 7 which is easily cut off.
The second skirt 3 has a protrusion 8 inside so as to enter the groove bead 10 of the can 5. Further, the lower end of the second skirt 3 is extended downward to a position at which the groove-shaped bead 10 is almost covered.

The more the inner protruding portion 8 of the second skirt portion 3 protrudes inward, the tighter the engagement with the grooved bead 10 becomes, and the more difficult it is to remove. In addition, the outer diameter of the lower end of the outer peripheral surface 9 of the second skirt portion 3 is substantially the same as the outer diameter of the outer peripheral surface 11 of the can at the lower end of the grooved bead 10, or the outer peripheral surface 9 is larger than the outer peripheral surface 11 of the can. It is preferable to have an outer diameter that is biased to the side so as to form a step (minus step) between the two. This is because when both have substantially the same outer diameter (flat) or a minus step, it is difficult for the fingertips to enter and it is difficult to remove the overcap. On the contrary, the outer peripheral surface 9
It is not preferable that the lower end is opened outside the outer peripheral surface 11 of the can to form a step (plus step) between the two because the fingertip easily enters the step and the overcap is easily removed.

A part of the second skirt portion 3 is provided with a peeling start piece (not shown) for separating the skirt portion 3 from the skirt portion 2.

The material of the overcap according to the present invention is:
Basically, a soft plastic material is preferable since it is required to have good adhesion to the can (sealability against odor / moisture) and ease of processing. Specifically, LDPE (low density polyethylene) is preferred, but other plastic materials and blended materials thereof can also be used.

The production method is based on a usual injection molding method.

Further, after setting the printed label sheet in a mold for injection molding, the resin may be injected to form an overcap. In this case, the label sheet can be attached to the top surface of the lid body of the overcap using the heat pressure at the time of injection.

The fitting (capping) of the overcap to the can product is carried out by hooking a part of the overcap obliquely to the upper end portion (winding portion) of the can and using a roller-like jig from the hooked portion. This is performed by pressing the overcap from above and then fitting the entire overcap into the canned portion of the can and the groove-shaped bead so as to spread the skirt portion while squeezing linearly. This capping method utilizing the elastic deformation of plastic is a method which has been conventionally performed with a general apparatus. According to this method, since secondary processing such as special thermal processing is not required after capping, it is possible to manufacture a product without reducing the production capacity.

[0019]

According to the overcap of the present invention, since the skirt portion is double-engaged with the outer peripheral portion (can upper end portion) near the can opening, it is difficult to remove the overcap from the outside, and the Mischief can be prevented beforehand. In a can product fitted with such an overcap, if the user attempts to remove the overcap, the skirt is destroyed and the trace becomes apparent from the outside, so that the purchaser can easily determine whether there is mischief. You can know.

Further, since the can and the overcap are doubly engaged (substantially in contact with each other), the sealing performance is improved, and the invasion and adhesion of moisture, odor and the like can be effectively prevented. .

In the embodiment in which the above-mentioned conventional overcap provided with the ring-shaped cutout portion and the present invention are combined, the skirt portion is cut off by pulling the peeling start piece connected to the second skirt portion. After cutting, the first skirt portion remains and can be easily opened and closed like a normal overcap.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of an overcap of the present invention.

FIG. 2A is a perspective view and FIG. 2B is a cross-sectional view showing the shape of a conventional overcap.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lid main body (disk body) 2 1st skirt part 3 2nd skirt part 4 Groove part 5 Can 6 Winding part 7 Thin part 8 Projection part 9 Outer peripheral surface 10 Groove bead 11 Can outer peripheral surface

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seiya Kono 5-1-83 Higashihara, Zama City, Kanagawa Prefecture Within Morinaga Dairy Products Co., Ltd. (72) Inventor Yasuo Kasuga 5 Higashihara, Zama City, Kanagawa Prefecture -1-83 Morinaga Milk Industry Co., Ltd. Analysis Center (72) Inventor Masayuki Kawajiri 1-1-1, Kagacho, Ichigaya, Shinjuku-ku, Tokyo Dai Nippon Printing Co., Ltd. (72) Inventor Kazuki Konishi Tokyo 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd. (72) Inventor Shinichi Mikami 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd. (56) Reference Reference JP-A-52-150183 (JP, A) JP-A 57-172746 (JP, U) JP-A 36-24388 (JP, Y1) JP-A 44-4918 (JP, Y1) (58) Field (Int.Cl. ⁷ , DB name) B65D 41/18 B65D 51/18

Claims (5)

(57) [Claims] 1. A a disk-shaped lid body is extended downward from the edge of said lid body engagement along the inside the outer shape of Kanmaki clamping portion
A first skirt portion provided with a groove to be formed;
And a second skirt portion extended below the skirt portion of the can wrapping portion when fitted inside the second skirt portion.
An overcap , characterized in that a projection is provided which is engaged with and engaged with the outer shape of the groove-shaped bead of the can provided with an outer diameter smaller than the outer diameter of the can. 2. The overcap according to claim 1, wherein said second skirt portion is extended to a position covering said groove-shaped bead. 3. The method according to claim 1, wherein the lower end of the second skirt has an outer diameter substantially equal to the outer diameter of the can at the lower end of the groove-shaped bead. Over cap. 4. The method according to claim 1, wherein the lower end of the second skirt has an outer diameter smaller than the outer diameter of the can at the lower end of the groove-shaped bead. Over cap. 5. The device according to claim 1, wherein a ring-shaped cut-out portion is provided between said first skirt portion and said second skirt portion. Over cap.