JPH0891411A - Closure with pull ring - Google Patents

Abstract

PURPOSE: To surely open a top wall by pulling up a pull ring by a method wherein a thick-wall rigid rod part to be pressed down is erected from a top surface of a bonding plate welded to a top surface of an aluminum sheet part disposed over a flange hole of a closure body, and the peripheral part of the aluminum sheet is welded to a top surface of an inward flange forming the flange hole. CONSTITUTION: A closure body 1 is provided with a projected outward flange 3 and an inward flange 5. A flange hole 5a is covered by welding the peripheral part of the lower surface of an aluminum sheet 6 to a top surface of the inward flange 5. In an uncovering part 8, a thick-wall rigid rod part 10 to be pressed down is erected from a top surface of a bonding plate 9 so that the rear surface of the rod part 10 and the rear outer surface of the bonding plate 9 are continuously disposed to be approximately flush with each other, and a pull ring 11 is laterally provided frontward on the upper end of the rear surface of the rod part 10 so as to surround the rod part 10. The inward flange 5 and the rod part 10 are connected to each other by a connecting piece 12 through a through hole formed in a part of the peripheral part of the aluminum sheet 6. In this manner, the closure body 1 and the uncovering part 8 are integrally molded out of a synthetic resin.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a stopper with a pull ring.

[0002]

2. Description of the Related Art An inner and outer double peripheral wall for fitting a neck of a container body is hung from an outer peripheral portion of a top wall, and a spout cylinder is provided from a top wall portion above the inner peripheral wall of the double peripheral wall. A short cylinder for fitting the lid body is erected so as to stand upright, and a thin break line is provided around the top wall part surrounded by the inner peripheral wall and the pouring cylinder, and the top wall part surrounded by the break line is removed. There is known a synthetic resin cap or plug with a so-called pull ring, in which a support rod is erected from a part of the peripheral edge of the removal plate portion and a pull ring is provided on the upper end of the rod.

In the cap or the stopper, the pulling plug is pulled upward to cut the breaking plug to remove the top wall portion surrounded by the breaking line, thereby opening the central portion of the top wall. When the food product is fitted into a sauce bottle, there is a drawback that the aroma and the like of the sauce is dissipated from the thin break line portion during the product distribution process. In order to eliminate this defect, a cap (Act No. 4-39174) is used in which a sheet having a water-resistant plastic film layered on top and bottom of a thin metal plate is layered on the lower surface of the top wall portion having the break line.

[0004]

The above-mentioned cap or stopper with a pull ring having a metal sheet is formed by laminating a plastic film on the upper and lower sides of a thin metal plate, and the outer periphery of the metal sheet is welded to the lower surface of the outer periphery of the top wall. Since the lower surface of the removal plate portion of the top wall surrounded by the break line is welded to the upper surface of the sheet central portion, when the pull ring is rarely pulled upward, the central portion of the metal sheet that should be removed together with the removal plate portion remains,
Further, even if the metal thin plate is removed, the plastic film layered on the lower surface of the metal thin plate remains, so that the top wall may not be opened. As a cause thereof, it is conceivable that the plastic film on the upper surface side of the metal thin plate and the lower surface of the removing plate portion or the metal thin plate and the lower surface side plastic film are welded or defectively bonded.

According to the present invention, a thick and rigid rod-shaped portion is erected from the upper surface of the joining plate corresponding to the above-mentioned removal plate portion, and a notch can be formed in a part of the metal sheet by pushing down the rod-shaped portion. After that, the pull ring is pulled up to surely open the top wall.

[0006]

SOLUTION: To solve the problem, an outward flange 3 to be engaged with the upper end surface of the mouth / neck is projected from the outer surface of the upper portion of the spout cylinder 2 fitted to the inner surface of the container neck and the lower end of the spout cylinder. A plug body 1 having an inward flange 5 attached to the inside thereof, and a lower surface of the outer peripheral portion welded to the upper surface of the inward flange to close the flange hole 5a of the inward flange. From the aluminum sheet 6 and the upper surface of the joining plate 9 welded to the upper surface of the aluminum sheet portion above the flange hole, and the rigid rod-shaped portion 10 having a thick pressing-down surface is
The rear surface 10a of the rod-shaped portion and the rear outer surface of the joining plate 9 are substantially flush with each other and stand upright, and the rod-shaped portion extends from the upper end of the rear surface of the rod-shaped portion.
A portion 8 for opening a plug that surrounds 10 and has a pull ring 11 horizontally provided forward
And a connecting piece 12 for connecting the inward flange 5 and the rod-shaped portion 10 through a through hole 7 formed in a part of the outer periphery of the aluminum sheet 6.
And the plug body 1 and the opening portion 8 were integrally molded with a synthetic resin material.

[0007]

The inward flange 5 of the plug body 1, the aluminum sheet 6, and the joint plate 9 of the opening portion 8 form the top wall of the above-mentioned conventional example, and the inner peripheral edge of the inward flange 5 is The aluminum sheet portion 6a between the outer peripheral edge of the joining plate 9 forms the break line of the conventional example.

When the upper surface of the rear portion of the rod-shaped portion 10 is strongly pressed downward with the illustrated plug fitted in the neck portion of the container body, the rear surface of the rod-shaped portion 10 and the rear outer surface of the joining plate 9 are substantially flush with each other. Therefore, the pressing force is concentrated on the aluminum sheet portion 6b between the rear outer edge of the joining plate and the rear inner edge of the inward flange.
Therefore, a cut line is generated in the portion. When the pull ring 11 is pulled upward after the cut is made, the pull ring is connected to the rear surface of the rod-shaped portion, so that the joining plate and the aluminum sheet portion to which the joining plate is welded from the cut portion are the break line corresponding portions. It is pulled up by breaking and opens.

[0009]

EXAMPLE A stopper with a pull ring according to the present invention comprises a stopper body 1,
It is composed of an aluminum sheet 6 and an opening portion 8, and the stopper body and the opening portion are connected by a connecting piece 12.

The stopper body 1 projects an outward flange 3 which engages with the upper end surface of the mouth neck portion from the upper outer surface of the pouring tube 2 fitted to the inner surface of the mouth neck portion of the container body, and from the outer periphery of the outward flange the mouth neck. The outer peripheral wall 4 to be fitted to the outer surface of the part is hung. An inward flange 5 is attached to the lower end of the spout cylinder. As shown in the figure, it is desirable that the upper end of the spouting cylinder be opened upwards and outwards so that the upper end of the spouting cylinder can be easily opened to facilitate drainage.

The aluminum sheet 6 is a known one in which a plastic film is laminated on both upper and lower surfaces of an aluminum thin plate, and its outer peripheral portion is welded to the upper surface of the inward flange 5 of the plug main body so that the inward flange is formed. The flange hole 5a is closed. As will be described later, a through hole 7 is formed in a part of the outer periphery of the aluminum sheet, which is the above-mentioned welded portion.

The cap opening portion 8 is constructed by erecting a push-down thick synthetic rod portion 10 from the upper surface of the joining plate 9 welded to the upper surface of the aluminum sheet portion above the flange hole 5a. The rear surface 10a of the rod-shaped portion 10 and the rear outer surface of the joining plate 9 are substantially flush with each other and stand upright, and a pull ring 11 is provided laterally forward to surround the rod-shaped portion from the upper end of the rear surface of the rod-shaped portion. The rod portion may be cylindrical,
As shown in FIGS. 2 and 4, the planar shape can be appropriately selected.

The plug main body 1 and the cap opening portion 8 are connected by the connecting piece 12 through the through hole 7 described above.
Usually molded from soft polyethylene. The integral molding is performed by insert molding the aluminum sheet 6 as described in Japanese Utility Model Publication No. 4-39174, but the runner or gate is provided on the plug body 1 side, and the through hole 7 of the aluminum sheet is melted. It can be opened by injection pressure of synthetic resin. The melting of the upper surface of the inward flange 5 and the lower surface of the joining plate 9 with respect to the aluminum sheet 6 is performed by using the same material as the plug body, the molten resin material for forming the opening-opening portion, and the plastic film.

[0014]

The present invention is configured as described above, and the rigid rod-shaped portion 10 having a thick wall for pushing down is attached from the upper surface of the joining plate 9 welded to the upper surface of the aluminum sheet portion above the flange hole 5a of the plug body 1.
Since the rear surface 10a of the rod portion and the outer surface of the joining plate 9 are substantially flush with each other, and the outer peripheral portion of the aluminum sheet is welded to the upper surface of the inward flange 5 forming the flange hole 5a, the rod portion 10 It is easy to form a notch in the aluminum sheet 6 portion between the rear outer surface of the joining plate 9 and the rear inner edge of the inward flange 5 by pushing the rear portion of the upper surface of the pull ring 11 downward. Since the pull ring is pulled up, the rod-shaped portion 10 is pulled up from the rear surface side because the pulling ring is pulled up from the upper end portion of the rear surface to the front side. Therefore, it is possible to surely rupture along with it and to open it, and it is possible to eliminate the above-mentioned conventional defects.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a stopper of the present invention.

FIG. 2 is a plan view of the stopper of FIG.

FIG. 3 is a vertical cross-sectional view of another embodiment plug.

FIG. 4 is a plan view of the stopper of FIG.

[Explanation of symbols]

 1 Plug body 6 Aluminum sheet 8 Opening part 12 Connecting piece

Claims (1)

[Claims] 1. A spouting tube (2) fitted to the inner surface of the neck of the container body.
From the outer surface of the upper part, an outward flange 3 to be engaged with the upper end surface of the mouth and neck is projected, and a plug body 1 provided with an inward flange 5 at the lower end of the spouting cylinder, and to the upper surface of the inward flange,
Weld the lower surface of the outer peripheral part to the flange hole 5a of the inward flange.
From the upper surface of the aluminum sheet 6 on which the plastic films are layered on the upper and lower surfaces of the aluminum thin plate, and the upper surface of the joining plate 9 which is welded to the upper surface of the aluminum sheet portion above the flange hole. The portion 10 on the rear surface 10 of the rod-shaped portion.
a and the rear outer surface of the joint plate 9 are substantially flush with each other and stand upright, and the pull ring 11 is provided laterally forward to surround the rod-shaped portion 10 from the upper end of the rear surface of the rod-shaped portion. Consists of
The inward flange 5 and the rod portion 10 are connected by a connecting piece 12 through a through hole 7 formed in a part of the outer periphery of the aluminum sheet 6, and the stopper body 1 and the stopper opening portion 8 are made of a synthetic resin material. A plug with a pull ring that is integrally molded.