JPH0430114Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a lid for a can, and more particularly to a lid made of synthetic resin that is attached to the top of a can.

[Summary of the idea]

This invention has been developed on the outer peripheral wall of a synthetic resin can lid.
The can is fitted by forming unevenness to allow air to escape, and fitting these unevenness to the outer edge of the can. This allows air to escape between the cans and the lid, and also absorbs dimensional variations between the can and the lid.

[Conventional technology]

2. Description of the Related Art Metal cans or synthetic resin cans used to fill and supply various beverages and foods are fitted with lids on top. By installing such a cover, it is possible to prevent the cans from collapsing when stacked in multiple tiers, and it is also possible to prevent dust from accumulating on the top of the cans. It becomes like this. Such a cover 2 is attached to the upper part of the can 1 as shown in FIG. 8, and the outer peripheral wall 3 of the cover 2 is fitted with the edge 4 of the can 1.

[Problem that the invention attempts to solve]

The dimensions of such a cover 2 for a can are those of the can 1.
If the fitting is proper, the lid will be fitted correctly as shown in FIG. 8, but if the fitting is too tight, the outer peripheral wall 3 of the cover 2 will come into close contact with the edge 4 of the can 1, as shown in FIG. This makes it difficult for the air between the can 1 and the cover 2 to be discharged. This causes the cover 2 to take on an upwardly bulging shape. Further, if the cover 2 is larger than the can 1, the fitting becomes loose and the cap 2 tends to come off as shown in FIG. 10. The present invention was devised in view of these problems, and is designed to allow air to be easily discharged between the cover and the can, and to prevent fitting due to dimensional variations between the cover and the can. It is an object of the present invention to provide a lid for a can that can prevent defects.

[Means to solve the problem]

The present invention is a synthetic resin cover that is attached to the top of a can whose top opening is hermetically sealed. In the cover lid having a ring-shaped protrusion on the outer periphery of the top surface, an unevenness is formed on the inner peripheral surface of the outer peripheral wall of the cover lid,
The convex portion protruding toward the center of the unevenness allows the cover lid to fit onto the outer edge of the upper portion of the can, and the concave portion of the unevenness allows the outer edge of the upper portion of the can to fit between the outer edge and the outer edge of the upper portion of the can. A gap is formed between the cover and the outer peripheral wall.

[Effect]

Therefore, when this cover is attached to the top of a can whose top opening is hermetically sealed, the convex part of the unevenness formed on the inner circumferential surface of the outer circumferential wall or the edge on the outer circumferential side of the top of the can attached It will be fitted. At this time, the dimensional deviation of the cover is absorbed by the deformation of the protrusion. In addition, since a gap is formed between the outer peripheral edge of the can and the outer circumferential wall of the cover lid due to the recesses in the unevenness of the inner circumferential surface of the outer circumferential wall, the upper part of the can and the cover cover are Air remaining inside will be exhausted through this gap.

【Example】

The present invention will be explained below with reference to an illustrated embodiment.
FIG. 1 shows a metal can equipped with a cover according to an embodiment of the present invention, and this metal can is composed of a metal can 10 filled with, for example, tuna pickled in salad oil. A cover 12 is attached to the upper edge 11 of the metal can 10. This cover 12 has a ring-shaped protrusion 13 on its upper surface and outer periphery.
Further, an anti-blocking protrusion 14 is formed on the inner circumference of the ring-shaped protrusion 13. These protrusions 14 are irregularly formed in the circumferential direction, and are designed to prevent the lids 12 from being engaged with each other when stacked in multiple stages. Furthermore, as shown in FIGS. 2 to 4, the cover 12 attached to the top of the metal can 10 has an engaging portion 17 formed along the circumferential direction on its outer peripheral wall 16. has been done. The engaging portion 17 is composed of a horizontally long rib that protrudes inward, and when the cover 12 is attached to the edge 11 of the metal can 10, it is engaged with the lower edge of the edge 11 and is engaged with the lower edge of the edge 11. 12 from falling off. Furthermore, a convex portion 18 is formed on the outer circumferential wall 16 of the cover 12. The convex portion 18 extends in the height direction of the cover 12. That is, while the engaging portion 17 is formed in a curved shape at the lower portion in the height direction, the convex portion 18 is formed so as to extend over the entire height of the outer peripheral wall 16. Further, a plurality of protrusions 18, for example six, are formed intermittently along the circumferential direction of the outer peripheral wall 16. By such a convex portion 18, the outer peripheral wall 16
is adapted to be fitted onto the edge 11 of the metal can 10. Therefore, with such a cover 12, the convex portion 18 of the outer peripheral wall 16 is fitted into the edge 11 of the metal can 10, as shown in FIGS. 5 and 6. With this, the cover 12
is adapted to be attached to the top of the metal can 10. Since the protrusion 18 fits into the edge 11, the cover 12 and the metal can 10 are attached to the portion of the outer peripheral wall 16 where the protrusion 18 is not formed, as shown in FIGS. 5 and 7. A gap is created in the area between the edge 11 and the air can flow. Therefore, the air between the metal can 10 and the cover 12 is discharged through this gap, and the cover 12 is prevented from being deformed by the air. Furthermore, with such a configuration, the cover 12
By intermittently forming convex portions 18 projecting inward on the outer circumferential wall 16, the circumferential length of the outer circumferential wall 16 is longer than that of the conventional cover, as is clear from FIG. become longer. Furthermore, since the convex portion 18 is integrally formed with the cover lid 12 formed by vacuum forming, it is easily deformed.
Therefore, with such a configuration, it is possible to absorb dimensional errors of the cover 12 with respect to the metal can 10. Even if the cover 12 is slightly larger in size than the metal can 10, the convex portion 18 allows it to fit with the edge of the metal can 10, making it possible to prevent poor fitting. Become. Therefore, the cover 12 will not fall off unexpectedly. Note that by adjusting the shape and number of the convex portions 18, it is also possible to adjust the strength with which the cover 12 fits into the metal can 10.

[Effects of the invention]

As described above, the present invention forms irregularities on the inner circumferential surface of the outer peripheral wall of the cover lid, and uses the protrusions that protrude toward the center of the irregularities to fit the cover lid to the outer peripheral edge of the upper part of the can. At the same time, a gap is formed between the outer circumferential edge of the can and the outer circumferential wall of the cover lid by the uneven concave portion. Therefore, according to such a configuration, the convex and concave portions of the outer circumferential wall of the cover lid fit into the edges on the outer circumferential side of the top of the can, thereby ensuring that the cover lid is securely attached to the top of the can. It will be installed on. Further, it becomes possible to absorb dimensional tolerances of the cover by deforming the convex portions of the convex and concave portions. In addition, because a gap is formed between the outer circumferential edge of the can and the outer circumferential wall of this cover lid due to the concave part of the unevenness formed on the inner circumferential surface of the outer circumferential wall, The air remaining in the space between the cover and the cover will be exhausted to the outside through the above-mentioned gap, and the cover will be reliably prevented from being deformed by the air that has no place to escape. Become.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a metal can equipped with a cover according to an embodiment of the present invention, Fig. 2 is a plan view of the cover, Fig. 3 is a front view of the same, and Fig. 4 is the same as that shown in Fig. 2. 〜A line sectional view, FIG. 5 is a cross-sectional view of the main part showing the fitted state of the cover, FIG. 6 is a diagram in FIG. 5〜
7 is a sectional view taken along the line ~ in FIG. 5; FIG. 8 is a longitudinal sectional view of main parts showing a conventional cover;
FIG. 9 is a longitudinal sectional view of the main part showing a state when the fitting is tight, and FIG. 10 is a longitudinal sectional view of the main part showing a state when the fitting is loose. The names of the main parts in the drawings are as follows. DESCRIPTION OF SYMBOLS 10... Metal can, 11... Edge, 12... Covering lid, 16... Outer peripheral wall, 18... Convex part.

Claims (1)

[Claim for Utility Model Registration] A cover made of synthetic resin that is attached to the top of a can whose top opening is hermetically sealed; In a cover lid having a ring-shaped protrusion on the outer periphery of the upper surface to be fitted with the cover lid, an unevenness is formed on the inner peripheral surface of the outer peripheral wall of the cover lid,
The convex portion protruding toward the center of the unevenness allows the cover lid to fit onto the outer circumferential edge of the upper portion of the can, and the concave portion of the unevenness allows the cover lid to fit between the outer circumferential edge of the can and the cover lid. A lid for a can, characterized in that a gap is formed between the lid and the outer peripheral wall of the lid.