JPH0420770Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an easy-open container that is opened by breaking the score line.

(Prior Art) Conventionally, as one of this type of container, a tab for opening the lid is provided at the lower edge of the peripheral wall that hangs down from the entire periphery of the panel section and is connected to one side edge of the tab. An easy-open container is known in which a peripheral wall of a container lid, which has score lines along the entire circumference of the peripheral wall, is fitted onto the opening of a container body made of a thin metal plate material and adhered to the container (Japanese Patent Application Laid-open No. 60-193837).

(Problem to be solved by the invention) With such a structure in which the lid is opened using the score line, after the lid is opened, all of the peripheral wall and panel portions of the container lid that were glued to the container body will be removed. removed. At this time, if the container body is about 0.1 mm to 0.2 mm thick like a normal metal can body, when the outside of the opening of the opened container body is grasped, the container body bends and deforms and is gripped. There are inconveniences that make it unfit to do so. Furthermore, since the edge of the opening of the container body is exposed when the lid is opened, injuries may occur if the lips or fingers touch the edge of the opening. As a result, when adopting this structure for beverage containers etc.
It is not preferable to use the opening of the opened container body as a drinking spout.

Furthermore, when the peripheral wall of the container lid is fitted over the opening of the container body and the lid is closed, the opening will be exposed inside the container, so that the edges may be exposed to the contents filled in the container while the container is being stored. There is a problem in that constant contact causes the contents to corrode the metal material of the container body, and the metal material dissolves into the contents, causing the contents to change in quality.

The present invention solves such conventional problems, provides stable lid opening performance, allows the container lid to be opened without remaining on the container body, and even if the container lid remains outside the opening of the container body after the lid is opened. An object of the present invention is to provide an easy-open container that can be held reliably and stably, and can prevent corrosion from the edge of the opening of the container body made of a metal material.

(Means for Solving the Problems) The present invention has been made to solve the above-mentioned problems. The peripheral wall of the container lid is provided with a tab for the lid and a means for opening the lid along the entire circumference of the peripheral wall extending from one side edge of the tab is made of a thin metal plate material with a thickness of 0.1 mm to 0.2 mm. In an easy-open container that is fitted and glued onto the opening of a container body, the opening of the container body is provided with a reduced diameter portion having a stepped portion having a diameter smaller than the diameter of the can body, and the reduced diameter portion is provided with a step portion having a diameter smaller than the diameter of the can body. A reinforcing member having a cross-sectional shape folded back to the side is fitted and bonded, and the peripheral wall of the container lid and the opening of the container body are bonded via the reinforcing member.

(Function) The opening of the container body is reinforced by the stepped portion and the reinforcing member, so it does not deform when the lid is opened, and even after the lid is opened, the outside of the opening of the container body can be reliably and stably gripped. Since the edge of the opening is covered and protected by a reinforcing member, danger to the user is prevented.
In addition, corrosion of the edges is prevented.

(Example) The present invention will be explained below with reference to the drawings.

1 and 2 show an example of the implementation of the present invention.

In the drawings, reference numeral 1 indicates a container lid, and the container lid 1 is made of a metal foil 2 made of stain-free steel, aluminum, etc., as shown in the second diagram, and the outer surface of the metal foil 2 is coated with a material such as polypropylene, polyethylene, etc. A thermoplastic resin coating 3 is applied, and a cylindrical peripheral wall part 5 is formed in a hanging shape on the entire periphery of the panel part 4 of the container lid 1, and as shown in FIG. A tab 6 for opening the lid is formed integrally with the peripheral wall portion 5 so as to be connected to the lower end. As shown in FIG. 1, the lid opening means 7 in the illustrated embodiment has a diagonal score line 8a that is connected to the lower edge of the peripheral wall portion 5 and extends diagonally from one side edge 6a of the tab 6, and a peripheral wall that is connected to the diagonal score line 8a. A score line 8 is formed of a horizontal score line 8b surrounding the peripheral wall part 5 at a position below the upper edge of the part 5. Moreover, the score line 8 is the metal foil 2 as shown in FIG.
The resin coating 3 was formed by contacting only the thermoplastic resin coating 3 coated on the outer surface with, for example, a heated blade or by irradiating laser beams to remove the resin coating 3.

In addition, in forming the score line 8, only a part of the resin coating 3 may be removed.

In the drawings, reference numeral 9 denotes a heat-adhesive resin coating made of polyolefin, polyamide, polyester, etc., which is applied to the inner surface of the container lid 1.

Further, 10 indicates a container body, and the container body 10 is the first
This is a so-called two-piece can made of aluminum or tin plate and provided with an opening 11 as shown in the figures and FIG. However, it may also be a so-called three-piece can made of sheet metal material such as tinplate or stainless steel. The plate thickness is 0.1mm~0.2
The can coating film 13 is applied to the inner and outer surfaces of the cylindrical body 12.

Then, as shown in the second diagram, a reduced diameter part 15 is formed around the entire circumference by providing a stepped part 14 at the opening 11 of the container body 10 and having an opening diameter _R2 smaller than the can body diameter _R1 . It was established by The opening 11 of the container body 10 is made of a heat-adhesive resin such as polyolefin, polyamide, polyester, etc., and a cross section is formed by covering the edge 11a of the opening 11 from the inner surface of the opening 11 and folding it back to the outer surface. An annular reinforcing member 16 that extends around the entire circumference of the opening 11 having the shape is fitted and adhered, and the inner surface 18 of the peripheral wall 5 of the container lid 1 having the above structure is attached to the reinforcing member on the outer surface 17 side of the opening 11 of the container body 10. 16, and is applied to the inner surface of the container lid 1 from the inner surface of the peripheral wall portion 5 corresponding to the position where the score line 8 is provided to the lower edge, and the reinforcement. The member 16 was adhesively fixed to form an adhesive portion 19 between the peripheral wall portion 5 of the container lid 1 and the opening portion 11 of the container body 10.

In order to strengthen the adhesion between the reinforcing member 16 and the opening 11 of the container body 10, it is preferable to use a suitable anchor coating agent.

As mentioned above, in the container of the present invention, the score line 8 as the lid opening means 7 is placed on the peripheral wall 5 at the upper edge 19a of the adhesive part 19 between the peripheral wall 5 of the container lid 1 and the opening 11 of the container body 10. Only the thermoplastic resin coating 3 was removed. Therefore, by pulling the tab 6 upward (in the direction of the arrow shown in the first figure), the metal foil 2 is broken along the score line 8, and the peripheral wall portion extending from the score line 8 continuous to the tab 6 to the lower edge is broken. 5 is the container body 10
The peripheral wall portion 5 that extends from above the score line 8 to the entire periphery of the panel portion 4 is connected to the container body 1.
0, the container lid 1 can be removed without remaining and the lid can be opened.

By opening the lid, the panel portion 4 and the peripheral wall portion 5 are completely removed from the container body 10, and the opening 11 of the container body 10 is fully opened. This fully opened opening 11 is reinforced by a reduced diameter portion 15 having a stepped portion 14 formed around its entire circumference, so that it will not deform when the opening 11 of the container body 10 is gripped. In addition, since the reinforcing member 16 is fitted to the reduced diameter portion 15, the pressure resistance reinforced by the reduced diameter portion 15 including the stepped portion 14 is further increased by the reinforcing member 16 over the entire circumference. I can do it. Therefore, even if the container body 10 is made of a metal thin plate material that is easily bent or deformed, when the outside of the opening 11 is gripped, even if the gripping force is strong, the container body 10
The grip can be held reliably and stably without bending or deforming.

Furthermore, since the edge 11a of the opening 11 of the container body 10 is covered all around with the reinforcing member 16, even if your lips or fingers touch the fully opened opening 11, the edge 11a of the opening 11 will be covered. This can prevent injuries caused by

Furthermore, since the reinforcing member 16 is fitted to the reduced diameter portion 15, the edge 11a of the opening 11 is covered and protected by the reinforcing member 16, so that the container body does not come into contact with the contents filled in the container. 10 will not corrode.

Next, the results of examining the compressive strength of the above-mentioned Example and Comparative Examples 1 and 2 are shown in FIG.

Example DI can container body: Aluminum
3004H19 material, container body thickness 0.12mm, can body diameter
R ₁ 66mm, reduced diameter part thickness 0.18mm, reduced diameter part opening diameter R ₂ 63.19mm.

Reinforcement material: high density polyethylene resin, thickness 1
mm, inner diameter 62mm.

Comparative example 1 DI can container body: aluminum
3004H19 material, container body thickness 0.12mm, can body diameter
R ₁ 66mm, the diameter of the opening is the same as the can body diameter R ₁ because there is no diameter reduction part.

Comparative example 2 DI can container body: aluminum
3004H19 material, container body thickness 0.12mm, can body diameter
R ₁ 66mm, reduced diameter part thickness 0.18mm, reduced diameter part opening diameter R ₂ 63.19mm.

Test method As shown in Figure 3B, pressure is applied inward (in the direction of arrow P) from both sides of the opposing openings at a position 5 mm below the open end of the container body to a certain size mm (can body diameter before deformation x The pressure value g required to crush the can body diameter (X ₂ after _deformation ) was measured.

As shown in FIG. 3A, an embodiment in which a reinforcing member 16 is fitted to a reduced diameter part 15 provided with a stepped part 14 provided in an opening 10 (example: the diameter of the can body before deformation is 66 mm is 10 mm)
1240g), Comparative Example 1 without a reduced diameter part (pressure value 300g under the same conditions as the example), and Comparative Example 2 with a reduced diameter part (example, pressure value 300g under the same conditions as the example). It was confirmed that there is a clear difference in pressure resistance between the example and the pressure value (920 g under the same conditions). In other words, the pressure resistance can be increased by providing a reduced diameter part with a stepped part in the opening, but it is also possible to increase the pressure resistance by fitting a reinforcing member to the reduced diameter part, even if the gripping force is increased. I can endure it.

Further, as in the other embodiment shown in FIG. 4, the container lid 1 has a metal foil 2 on the outer surface and a heat-adhesive resin coating 9 on the inner surface, and this heat-adhesive resin coating 9 has the above-mentioned structure as a lid opening means. A score line 8 may also be provided.

Such a configuration is advantageous because the score line 8 is not exposed on the outer surface of the container lid 1, so that dust does not enter the score line 8.

FIG. 5 shows yet another embodiment of the present invention. In the illustrated case, the container body 1
0 and the outer surface 17 of the opening 11 and the peripheral wall 5 of the container lid 1
The end edge 11 of the opening 11 is made of a thermoadhesive resin material interposed between the inner surface 18 of the opening 11 and the inner surface 18 of the opening 11.
In the recess 21 provided on the outer surface 20 of the annular reinforcing member 16 covering the entire circumference of the opening 11 having a cross-sectional shape that is folded back to the outer surface side, a lid-opening member having approximately the same cross-sectional shape as the recess 21 is provided. A strip 22 is housed to serve as a lid opening means connected to a tab 6 provided on the container lid 1. With such a configuration, the outer surface of the opening strip 22 does not appear on the outer surface of the container lid 1, resulting in a harmonious appearance. Further, since it is not necessary to provide a score line for opening the lid as in the conventional case on the metal foil 2 of the container lid 1, the thickness of the metal foil 2 can be reduced and the weight of the container lid 1 can be reduced.

(Effect of the invention) As described above, according to the invention, a reduced diameter part having a stepped part with a diameter smaller than the diameter of the can body is provided at the opening of the container body, and the reduced diameter part has a cross-sectional shape folded from the inner surface to the outer surface. A ring-shaped reinforcing member was fitted, and the peripheral wall of the container lid and the opening of the container body were bonded together via the reinforcing member. Therefore, even after the container lid is opened and completely removed from the container body, the reduced diameter portion with a stepped portion is formed at the opening of the container body over the entire circumference.
Even if the container body is made of a thin metal plate material that is easily bent and deformed, the opening of the container body can be gripped reliably and stably, and since the reinforcing member is fitted to the reduced diameter portion, The pressure resistance strength, which has been improved by providing the diameter portion, can be further increased. In addition, the edge of the opening of the container body is covered and protected all around with a reinforcing member, so when the opening is used as a drinking spout, injury to the lips etc. from the edge can be prevented, and the container can be preserved. Since the edge of the opening can be prevented from being corroded by the contents filled inside the container, and is kept clean by being covered by the container lid, the opening can be used as the drinking spout of the beverage container. This has the effect of providing an easy-to-open container suitable for use.

[Brief explanation of drawings]

Fig. 1 is a front view showing one example of implementing the present invention;
The figures are an enlarged view of part A in Fig. 1, Fig. 3 is a view showing the pressure resistance of the container body, Fig. 4 is an enlarged view similar to Fig. 2 showing another embodiment of the present invention, and Fig. 5 is an enlarged view of part A of Fig. 1. 2 is an enlarged view similar to FIG. 2 showing still another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Container lid, 4... Panel part, 5... Peripheral wall part, 6... Tab, 7... Lid opening means, 10... Container body, 11... Opening part, 14... Step part, 15... ...Reduced diameter portion, 16...Reinforcement member.

Claims (1)

[Scope of utility model registration request] 1. A tab for opening the lid is provided on the lower edge of the peripheral wall that hangs down from the entire periphery of the panel, and an opening means is provided along the entire periphery of the peripheral wall connected to one side edge of this tab. In an easy-open container in which the peripheral wall of the container lid is fitted over and adhered to the opening of a container body made of a thin metal plate material with a thickness of 0.1 mm to 0.2 mm, a container with a diameter smaller than the can body diameter is attached to the opening of the container body. A reduced diameter part with a stepped part is provided, and a reinforcing member having a cross-sectional shape that is folded back from the inner surface side to the outer surface side is fitted and adhered to the reduced diameter part, and the peripheral wall of the container lid and the container body are connected through the reinforcing member. An easy-open container characterized in that the opening of the container is glued to the opening of the container.