JPH0140863Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the invention of a pot-shaped container lid, which is formed by an inner lid made of synthetic resin and an outer lid made of a thin metal plate such as aluminum, which is seamed when the lid is sealed. The residual stress (restoring force) of the bottle is concentrated on the mouth part of the bottle, and the lid can always be kept stable as a replacement lid after opening, and the opening operation is easy and accurate, and it is also economical. The lid of the container is designed to close tightly.

BACKGROUND ART Cup-shaped containers with sealed lids that must be opened for drinking have been put into practical use for sake and other non-carbonated beverages. By the way, in such container lids, a tear line is formed along the outer periphery of the beaded portion formed at the opening, and the metal lid is torn along the tear line when opening the container. In order to do this, the gripping piece has a width of, for example, about half the diameter of an adult's fingertip, and by gripping this gripping piece, especially at the start of pulling, a sufficient friction force is generated to cut the score line. Therefore, it is necessary to make the bead part protrude below the enclosing metal lid tightening part, and the protruding length of this gripping piece is such that it can be pulled up and used as described above with the tip of the finger. Since it is necessary to have a grip that ensures a frictional force such as this, and is sufficient to apply an effective tensile force, it requires a considerable length, and such a gripping piece is attached to the winding around the circumference of the material plate. When it is made to protrude from the tightening part forming part, it becomes as shown in the imaginary line shown in FIG. will protrude, and an extra material plate will be required. A wide rolled metal plate is used as the material plate for the lid, and is manufactured by punching it.
As a result of this protrusion, the amount of blank material required will increase by about 10% even if punching is performed in a combination state in which the position of the protruding head 5a is changed. Since it is the main material used to obtain carbon dioxide, the cost inevitably increases. In addition, for bottle lids made mainly of metal plates, a special packing material is welded into the arc-shaped curved part surrounding the beaded edge of the bottle, as described above. In the case of aluminum-based packing materials, the packing material does not stick to the metal material in a stable state, so it is necessary to form a base treatment film with a special binder function, which increases the number of manufacturing steps. Since there is a high possibility that the contents of a cup-shaped container will spill, it is necessary to separately prepare a replacement lid to apply after opening and cover the outside of the metal lid that is tightly attached as described above. The reason for this increase in cost is that this type of cup-shaped container is 200 ml or less, and the number of container lids required for the amount of sake, etc. that is the product is enormous, so it is difficult to put it into practical use. This would inevitably be a huge disadvantage. In addition, in conventional products as described above, the metal lid is sealed by wrapping it around the lower surface of the outer periphery of the bead of the opening. direct contact (as mentioned above, the packing material welded is formed by melting and pooling at the bottom of the groove, so just contacting the top edge of the bottle neck rim covers the entire rim) Because the welding process is done without protecting it (not protected), there is a possibility that the bead edge part may be damaged, and sufficient seaming cannot necessarily be achieved, especially the 5 parts of the gripping piece that protrude greatly as mentioned above. There is a tendency to inhibit this tightening.

Furthermore, the lids of such pot-shaped containers prevent the containers from collapsing when they are stacked in multiple tiers for display or handling, and also limit the expansion and deformation range of the lids after heat-sealing to prevent them from fitting against the bead edges. In order to prevent the seal from deteriorating, it is necessary to make a recess in the center of the lid, and in this case, if the seaming is performed as described above, the resin inner lid and the metal outer lid will be recessed. Iribe stretches as if floating,
The portion that fits inside the bead edge tends to float up, impeding the sealing function.

The present invention was devised through research to eliminate the disadvantages and shortcomings of the conventional ones as described above, and includes a circular part 1 surrounded by a part where a seaming part 3 is to be formed on a raw metal plate. When punching out the material, as shown in FIG.
A short and small notch 2 with an acute angle is formed in a part of the peripheral side of the cut line parallel to the cutting line direction, a gripping piece 4 is formed on the outer side of the notch 2, and the cutting depth of the notch 2 is is also used for the length of the gripping piece 4 to make it continuous with the cut line (score line) 7 made by cutting a part of the plate thickness for opening the gripping piece 4 of a predetermined length (not perforated). There may be a continuous part), and the head 4 of the gripping piece 4
a is placed within the corner of the circumscribed rectangular area 10 with respect to the circular part 1, and the circular arc-shaped curved part 6 and the winding are made to fit in the corner part of the circumscribed rectangular area 10 with respect to the circular part 1. An outer lid A with a tightening portion 3 formed thereon, an inner lid B made of synthetic resin as shown in Figs. 3 to 5 is polymerized inside the outer lid A, and a second
As shown in the drawings and FIG. 7, a recessed portion 8 corresponding to the opening 20 is formed. That is, this synthetic resin inner lid B has an arcuate portion 16 along the arcuate curved portion 6 formed on the outer periphery, and a drooping portion 13 inscribed in the seam-fastening portion 3 is integrally formed inside the arcuate portion 16. Further, as shown in FIG. 7, an annular protrusion 14 that fits into the opening 20 is integrally molded inside the arcuate portion 16, and the annular protrusion 14 is thicker than the hanging portion 13. It is. As described above, the perforation line 7 is formed continuously at the base of the gripping piece 4, and the gripping piece 4 extends from the center point of the disc 1 to the circumferential edge of the tightening portion 3 in the circumscribed rectangular area. 10 The center of the head 4a is relative to the straight line connecting the points of contact with the periphery.
The circumscribed rectangular area 1 is formed to extend over a range of approximately 45°, and the circumferential sides of the circular head 4a intersect at right angles.
By forming it so that it is in contact with the edge of 0, the square circumscribed rectangular area 10 can be appropriately utilized efficiently.

To explain the operation of the device according to the present invention as described above, the gripping piece 4 is formed as described above using the notch 2, so that a sufficient area is secured at the head of the gripping piece 4, Moreover, the width of the rectangular area 10 in the raw material plate for obtaining this kind of container lid is reduced to the minimum while allowing the pulling to be carried out under conditions with almost no resistance and ensuring a length suitable for subsequent gripping and pulling. In addition, there is no need to take into account the direction of the gripping pieces 4 when combining them, and mass production and easy punching can be achieved.
Moreover, the seam-fastening part 3 is attached to the outer cover A, which is formed by molding this metal plate to form the circular arc-shaped curved part 16 and the seam-fastening part 3.
Since the inner lid B made of synthetic resin with the hanging part 13 is polymerized and applied to the inner lid B, even if the notch part 2 is formed to a certain depth as described above, the seaming part 3 is
The notch 2 is closed by hanging forming as shown in FIG. 7 (this hanging forming naturally reduces the width of the cut 2 in FIG. However, the cut portion is hardly exposed, and the bottle mouth bead 21 is completely enclosed by the arcuate portion 16 and the hanging portion 13 of the synthetic resin inner lid B, so that an effective seal is formed. That will happen. When the gripping piece 4 pulled up by the notch 2 when opening the package is gripped with the fingertips, the head is sufficiently separated from the outer surface of the container by the notch 2, and the gripping piece 4 can be grasped accurately between the fingertips, and This provides a suitable friction area and a length suitable for cutting along the perforation line 7. In addition, during the seaming process, the hanging part 13 covers and protects the opening bead 21, thereby ensuring sufficient seaming and relaxing the curved surface of the outer lid A when seaming it. To reduce the degree of occurrence of vertical wrinkles in a cut-off strip, and to prevent the cut-off strip from being cut by the longitudinal wrinkles. In addition, since the inner lid B has an annular protrusion 14 that engages with the opening 20 and is thicker than the hanging part 13, the seaming part 3 and the hanging part 13 are attached to the lower surface of the bead 21. In other words, since the drooping part 13 is present, the bead edge 21 part is not damaged even by the above-mentioned sufficient seaming force of the seaming and sealing machine. This tightening force causes the outer lid A and the inner lid B to be pulled in the circumferential direction, but the tensile force acting on the inner lid B is properly locked in the opening 20 by the annular protrusion 14, It is preferable that the top plate 8 portion of the outer lid A and the top plate portion of the inner lid B are not deformed due to elongation, especially the recessed portions do not float, and a stable sealing relationship is formed and maintained at the inner portion of the bead. Since the residual stress, particularly the restoring force after the arcuate portion 16 is tightened, is concentratedly applied to the mouth of the bottle, effective sealing of the opening is completed and the sealing relationship can be maintained for a long period of time. As mentioned above, when the bottle lid of the present invention, which has a small length protruding from the circular plate 1 area of the gripping piece 4, is sealed with an automatic sealing machine or the like, the bottle lids are less likely to get entangled with each other, and the operation can be carried out smoothly. As mentioned above, since the required amount of materials is small and can be obtained through mass production, the product can be obtained at low cost, and even if an inner lid is used, the cost will increase because the replacement lid is not attached to the outside as in the past. Rather, handling during packaging can be made more efficient. Furthermore, even when the inner lid B is used as a replacement lid, the inner lid B of the present invention, which has an annular protrusion 14 that is thicker than the hanging portion, exhibits a stable and preferable function as a replacement lid. This is a highly effective idea in terms of practical use and production.

[Brief explanation of the drawing]

The drawings show embodiments of the invention,
Figure 1 is an explanatory diagram showing the state in which the outer lid according to the present invention is cut out from a material plate in comparison with the conventional one, Figure 2 is a plan view of the outer lid according to the present invention, and Figure 3 is a synthetic resin inner lid. A plan view of the lid, FIG. 4 is a partially cutaway side view,
Figure 5 is a bottom view of the device, Figure 6 is a side view of the device according to the present invention showing how it is sealed to the container, and Figure 7 is a partially enlarged view of how it is sealed to the beaded opening. FIG. However, in these drawings, 1 is a circular part, and 2 is a circular part.
3 is a notch part, 3 is a seaming part, 4 is a holding piece, 4a is its head, 6 is an arcuate curved part, 7 is a cut line, 8 is a top plate part, 10 is a square part, 13 is a hanging part, 14 is an annular projection, 20 is an opening, 21 is a bead, A is an outer lid, B
indicates a synthetic resin inner lid, and C indicates a cup-shaped container.

Claims (1)

[Scope of Claim for Utility Model Registration] An outer lid made of a thin metal plate and having an arcuate curved part and a rolled sealing part attached to a bead formed around the opening of a cup-shaped container; In a synthetic resin inner lid that is housed inside an outer lid, the central part of the top plate is recessed to form a composite part, and the rolled and sealed part is formed in the material plate for forming the outer lid. A gripping piece is formed within a rectangular area circumscribing the circular area and has a head extending from a circumscribed position of the circular area to the square area in the direction of a corner of the square area, An acute-angled notch is formed on the inner diameter side of the protruding end, a perforation line for opening the seal is continuously formed at the tip of the notch, and the synthetic resin inner lid is sealed with the rolled seal. What is claimed is: 1. A cup-shaped container lid, characterized in that a hanging part is formed inside the cup-shaped container, and an annular protrusion that fits into the opening of the cup-shaped container is formed with a thickness larger than that of the hanging part.