JP3022678U - Opening device for packaging containers - Google Patents

Abstract

(57) Abstract: It is an object of an opening device made of synthetic resin to avoid the occurrence of pinholes and enable reclosing. An annular wall (3) is formed at the mouth of a container, and an outer collar (7) is connected to the upper edge of the annular wall (3). A synthetic resin layer 8 covering the upper part of the annular wall 3 is layered on the outer flange 7, and a score 6 for breaking is formed inside the outer flange 7 or the upper part of the annular wall 3. The peripheral portions of the outer collar 7 and the synthetic resin layer 8 are bent downward along the annular wall so that they can be reclosed. [Operation] When one end of the synthetic resin layer 8 is picked up and pulled up together with the outer collar 7, the score 6 is broken and opened. Synthetic resin layer 8
Since the peripheral edge portion of is shaped along the annular wall 3, it can be fitted into the annular wall 3 and reclosed.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a synthetic resin opening device applied to a packaging container suitable for beverages.

[0002]

[Prior art]

 Conventionally, various types of opening devices made of synthetic resin have been proposed, such as one formed integrally with the top plate of a container or one in which only the opening device is independent for mounting on a paper container. In all of these, a score is formed around the planned opening, the opening knob on the top of the planned opening is pulled up, and one end of the score is broken using the principle of folding, and then the entire score is broken. To break and open. Further, as a simple structure, a structure in which an opening formed in a container in advance is closed with a metal film is also widely used.

[0003]

[Problems to be solved by the device]

 In the device provided with the opening knob, the score portion is exposed. Therefore, in order to maintain the quality of the contents, it is essential to avoid the occurrence of pinholes. Therefore, quality control when manufacturing the opening device is strict. In addition, it is preferable to form a deep score in order to facilitate breakage, but there is a limit to the depth of the score in relation to the prevention of pinholes, and breakage requires comparatively strong force. And, in order to break the wall thickness of the score part, it is inevitable to use the principle of picking. Next, what is closed with a metal film is not suitable for a large container such as 1 liter because it is difficult to close it once it is opened.

[0004]

[Means for Solving the Problems]

 This invention is an opening device made of synthetic resin in which an annular wall that rises from the opening of the container is formed.This device can be integrally molded with the top plate of the container, but it can also be attached separately to a container such as paper. It may be the one that has been adapted.

According to a first aspect of the present invention, a closing plate made of synthetic resin is provided on an upper portion of the annular wall, and a score for breaking the closing plate is formed on an inner side of an upper portion of the annular wall. An outer sword is installed on the upper edge of the. A synthetic resin layer is layered on the upper surface of the closing plate and the outer collar, and the peripheral portions of the outer collar and the synthetic resin layer are bent downward along the outer surface of the annular wall, and the outer collar is formed into an annular shape after opening. The size is such that it can be reclosed so that it can be fitted into a wall, and the score is broken and opened by picking up one end of the synthetic resin layer that is the base end of the opening and pulling it up.

According to the second aspect of the invention, the closing wall is not provided on the annular wall. An outer collar is connected to the upper edge of the annular wall, and a score is provided on the inner edge of the outer collar. A synthetic resin layer covering the opening is layered on the outer collar, and the opening base end of the synthetic resin layer is picked up and pulled up so that the score is broken and opened to open the packaging container. Make up.

The outer collar and the score may be formed on the entire circumference of the annular wall, but they are formed incompletely in an annular shape except for the facing portion of the base end of the opening (claim 3), and the synthetic resin layer is formed at the time of opening. It is preferable that it is not completely separated. The synthetic resin layer can be easily opened by providing a knob at the base end of the opening (claim 4), and the same material as the annular wall and the outer collar is suitable for recycling after use (claim 5). ). Further, the planar shape and other specific shape of the annular wall can be appropriately determined.

[0008]

[Action]

 In this invention, the score is not exposed and is covered by the synthetic resin layer. Therefore, even if the score has a pinhole, the pinhole is covered with the synthetic resin layer, so that the contents are not adversely affected. Therefore, the quality control is simple and sufficient, and the depth of the score can be formed sufficiently deep, so that the score can be broken with a small force. That is, the score can be easily broken by picking one end of the outer collar and pulling it up without providing a special knob. Further, since the outer wall is along the annular wall, it is possible to reclose after the opening by fitting the outer wall to the annular wall without providing a special locking means unlike the conventional device.

[0009]

Embodiment 1 An annular wall 3 is provided upright on the periphery of an opening 2 of a substrate 1 fixed to the mouth of a container, and a closing plate 4 is provided on the upper portion of the annular wall 3. The opening 2 has a pentagonal shape, and one corner is an opening base end 2a, and the opposite side of the opening base end 2a is a straight line portion 5. And, a score 6 for breaking is formed on the peripheral edge of the lower surface of the closing plate 4 except for the straight line portion 5. An outer flange 7 is provided on the upper edge of the annular wall 3 except for the straight portion 5, and a synthetic resin layer 8 is layered on the upper surface of the closing plate 4 and the outer flange 7. The outer collar 7 on which the synthetic resin layer 8 is layered is bent downward to extend along the annular wall 2, and the end of the synthetic resin layer 8 is horizontally oriented on the opening base end 2a side. It protrudes to and becomes the knob 9. The size of the outer collar 7 is such that sufficient fixing strength with the synthetic resin layer 8 can be obtained, and the outer collar 7 can be fitted into the annular wall 3 again after opening. The substrate 1, the annular wall 3, and the outer collar 7 are integrally molded of synthetic resin, and the synthetic resin layer 8 is preferably made of the same material.

In the opening device configured as described above, when the knob portion 9 formed on the synthetic resin layer 8 is picked up and pulled up, the outer collar 7 fixed to the synthetic resin layer 8 is also pulled up, The lifting force causes the score 6 to break and open. Then, the synthetic resin layer 8 and the outer collar 7 serve as a cap so that the outer collar 7 can be re-fitted to the annular wall 3 again. Therefore, after the opening, the outer collar 7 is fitted again to the annular wall 3. Allows the opening to be reclosed.

To manufacture the above opening device, first, the substrate 1, the annular wall 3, and the outer collar 7 are integrally molded. At this time, the outer collar 7 is laterally projected, and the score 6 is also formed at the same time. Next, the outer collar 7 is bent downward and along the side surface of the annular wall 3, the synthetic resin layer 8 is molded and fixed to the closing plate 4 and the outer collar 7. The above molding process can be performed as a series of operations by a two-layer molding machine.

[0012]

Embodiment 2 The embodiment of claim 2 is as follows. An annular wall 3 is erected on the periphery of the opening 2 of the substrate 1 fixed to the mouth of the container, and the annular wall 3 is not provided with a closing plate. The opening 2 has a pentagonal shape, one corner of which is an opening base end 2a, and the opposite side of the opening base end 2a is a straight line portion 5. An outer collar 7 is provided on the upper edge of the annular wall 3 except the straight portion 5. The outer collar 7 has a score 6 formed on the inner edge of the lower surface, is bent downward and is in contact with the annular wall 2. The opening 2 is covered with a synthetic resin layer 8 made of the same material as that of the substrate 1 and the like, and the periphery of the synthetic resin layer 8 is fixed to the outer flange 7 and the annular wall 3 of the linear portion 5. I am doing it. Also in this embodiment, the score 6 is broken by pulling up the knob 9 of the synthetic resin layer 8 and the outer collar 7 is separated from the annular wall 3, so that the opening is opened. Further, since the outer flange 7 and the synthetic resin layer form a capped cylinder, reclosure is possible.

[0013]

[Effect of device]

 According to this invention, since the score is provided on the inner edge of the outer flange and the synthetic resin layer covering the opening is layered on the outer flange, the score is not exposed and there is no possibility of pinholes. Therefore, since the score can be formed as deep as possible, it is possible to break the score with a small force only by pulling up the synthetic resin layer without the need for the lever action by the knob, which is essential in the conventional structure. It can be opened. Since the outer collar is along the side of the annular wall, it can be reclosed, and the score is discontinuous at one end so that the outer collar and the synthetic resin layer do not completely separate from the annular wall after opening. So convenient for re-occlusion. Further, if a knob portion is provided so as to project at the base end of the opening of the synthetic resin layer, the synthetic resin layer can be easily picked and handled when the synthetic resin layer is pulled up.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention viewed from the bottom side.

FIG. 2 is a sectional view of the same.

FIG. 3 is a sectional view of the same before a synthetic resin layer is attached.

FIG. 4 is a perspective view of a second embodiment of the present invention viewed from the bottom side.

FIG. 5 is an exploded sectional view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2 Opening 2a Opening base 3 Ring wall 4 Closing plate 5 Straight line 6 Score 7 Outer brim 8 Synthetic resin layer

Claims (5)

[Scope of utility model registration request] 1. An annular wall having a synthetic resin closure plate on the upper part of the opening, and a score for breaking the closure plate is formed inside the upper part of the annular wall. An outer flange is continuously provided on the outer wall, and a synthetic resin layer is layered on the upper surface of the closing plate and the outer flange, and peripheral portions of the outer flange and the synthetic resin layer are bent downward along the outer surface of the annular wall. In addition, the outer collar is resealable so that it can be fitted into the annular wall after opening, and the score is broken and opened by picking up one end of the synthetic resin layer that is the base end of the opening and pulling it up. Opening device for packaging containers configured as 2. An annular wall is formed at the peripheral edge of the opening, and an outer flange is provided at an upper edge of the annular wall, a score for breaking the outer flange is formed on the outer flange, and the opening is formed in the outer flange. A synthetic resin film is layered to cover the outer flange and the peripheral portions of the synthetic resin layer are bent downward along the outer surface of the annular wall, and the outer flange has a size that can be fitted to the annular wall after opening. An opening device for a packaging container, wherein the score is broken and opened by picking up and pulling up one end of the synthetic resin layer that is the base end of the opening and is recloseable as 3. The opening device for a packaging container according to claim 1, wherein the outer collar and the score are not formed at the facing portion of the opening base end. 4. The opening device for a packaging container according to claim 1, wherein a knob portion is provided at the base end of the opening of the synthetic resin layer. 5. The opening device for a packaging container according to claim 1, wherein the synthetic resin layer is made of the same material as the annular wall and the outer collar.