JP2004217250A - Composite container lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a synthetic resin container lid, which allows a person to insert a straw (68) through the mouth (62) of a container while preventing the straw from coming off and suck a drink in the container, to give the container lid sufficient drop resistance and impact resistance, to make a breakable thin line easy to break, and to provide the container lid with sufficient sealing property. <P>SOLUTION: The container lid is composed of a stopper body (2) having a top face wall (6) on which the breakable thin-walled line 20 is formed, and an outer lid body (4) having a circular wall (38) covering the outer circumferential edge (10) of the top face wall of the stopper body and a cylindrical skirt wall (40) drooping from the circumferential edge of the circular wall (38). The stopper body and the outer lid body are made of different synthetic resin materials, respectively, and the stopper body is more flexible than the outer lid body. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a synthetic resin container lid applied to the mouth and neck of a beverage container, and more particularly, to insert a straw without detaching from the mouth and neck of the container and suck the beverage in the container through the straw. The present invention relates to a synthetic resin container lid that can be used.
[0002]
[Prior art]
Patent Literature 1 below discloses a synthetic resin container lid applied to the mouth and neck of a beverage container. Such a container lid has a top wall and a cylindrical skirt wall hanging from the periphery of the top wall. The top wall is provided with an arc-shaped main portion, a pair of linear additional portions extending from both ends of the arc-shaped main portion, and a breakable line including an arc-shaped additional portion extending between the tips of the pair of linear additional portions. I have. In such a container lid, at least the arc-shaped main portion of the breakable line is broken by aligning and pressing the tip of the straw with the arc-shaped main portion of the breakable line, and is surrounded by the arc-shaped main portion of the top wall. The straw can be displaced downward to allow the straw to enter the container, and the beverage in the container can be sucked through the straw without removing the container lid from the mouth and neck of the container. If desired, the beverage in the container can be consumed by removing the container lid from the mouth and neck of the container.
[0003]
[Patent Document 1]
JP 2002-205753 A
[Problems to be solved by the invention]
Therefore, the container lid disclosed in Patent Document 1 has the following problems to be solved. In order to make the breakable line provided on the top wall easily breakable using a straw, the container lid must be made of a relatively soft synthetic resin with low mechanical strength such as low-density polyethylene. It is desired to form. However, when a container lid is formed from a relatively soft synthetic resin having low mechanical strength, the strength of the container lid tends to be insufficient, and the drop resistance and impact resistance tend to be too small. On the other hand, in order to increase the strength of the container lid, if it is formed of a relatively hard and high mechanical strength synthetic resin such as polypropylene or high-density polyethylene, the breakage provided on the top wall In addition to making it relatively difficult to break possible lines, if the seal to be tightly attached to the mouth and neck of the container is also integrally formed, the sealing properties tend to be inadequate.
[0005]
The present invention has been made in view of the above-mentioned facts, and a main technical problem thereof is that a beverage in a container can be sucked through a straw by inserting a straw without detaching from the mouth and neck of the container. A new and improved synthetic-wooden container lid having sufficient drop and impact resistance properties, as well as a rupturable thin line that is easily broken and also has sufficient sealing properties. It is to provide a container lid made of synthetic resin.
[0006]
[Means for Solving the Problems]
The present inventors have disclosed a plug having a top wall on which a breakable thin line is disposed, an annular wall covering the outer peripheral edge of the top wall of the plug, and a tubular skirt wall hanging down from the periphery of the annular wall. The main technical aspect is achieved by forming a container lid from two members with an outer lid having a lid, forming the stopper from a relatively soft synthetic resin, and forming the outer member from a relatively hard synthetic resin. It has been found that the task can be achieved.
[0007]
That is, according to the present invention, as a container lid for achieving the above-mentioned main technical problem, a synthetic resin plug having a top wall covering the top surface of the mouth and neck of the container, and an outer portion of the top wall of the plug are provided. A composite container lid comprising: an annular wall covering the peripheral portion; and a synthetic resin outer lid having a cylindrical skirt wall hanging from the peripheral edge of the annular wall.
The stopper and the outer lid are formed of different synthetic resins, the stopper is softer than the outer lid, and a breakable thin line is provided at the center of the top wall of the stopper. A composite container lid is provided, wherein the lid is provided.
[0008]
The breakable thin line has an arc-shaped main portion, a pair of linear additional portions extending from both ends of the arc-shaped main portion, and further an arc-shaped or linear additional portion extending between the tips of the pair of linear additional portions. It is convenient to include parts. Preferably, a projection is formed between the pair of linear addition portions of the breakable thin line, and the projection is a pair of inclined portions inclined downward toward each of the pair of linear addition portions. And a boundary ridge between the pair of inclined surfaces is inclined downward toward the arc-shaped main portion. The breakable thin line is defined by forming a score on the upper surface of the top wall, and the score preferably has a cross-sectional shape that gradually narrows downward. Conveniently, a plurality of radially extending grooves or ribs are arranged on the upper surface of the outer peripheral edge of the top wall of the plug and / or the lower surface of the annular wall of the outer lid. An annular ridge is provided on an upper surface of the top wall of the plug, and an outer peripheral surface of the annular ridge is spaced from an inner peripheral surface of the annular wall of the outer lid. Advantageously, they are positioned opposite each other. The plug can be formed from low density polyethylene and the outer lid can be formed from polypropylene or high density polyethylene.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of a composite container lid constructed according to the present invention will be described in more detail with reference to the accompanying drawings.
[0010]
As shown in FIGS. 1 and 2, it is important that the composite container lid constructed in accordance with the present invention comprises a plug 2 and an outer lid 4 which are separately formed of synthetic resins different from each other. It is. The stopper 2 is made of a synthetic resin having relatively small mechanical strength and relatively soft, for example, low-density polyethylene. The outer lid 4 is made of synthetic resin having relatively large mechanical strength and relatively hard. For example, it is formed from polypropylene or high density polyethylene.
[0011]
Referring to FIG. 3 and FIG. 4, the plug 2 has a circular top wall 6. The central portion 8 of the top wall 6 is relatively thick, and the outer peripheral edge portion 10 is relatively thin. The outermost peripheral edge 11 of the top wall 6 is inclined slightly downward toward the outside in the radial direction. A substantially cylindrical seal ring 12 hanging downward is provided on the lower surface of the outer peripheral edge portion 10. The inner peripheral surface of the seal ring 12 has a truncated conical shape whose inner diameter gradually increases downward, the upper outer peripheral surface has a truncated conical shape whose outer diameter gradually increases downward, and the lower peripheral surface lower. It has an inverted truncated cone shape whose outer diameter gradually decreases. A seal ridge 14 located outside the seal ring 12 is further provided on the lower surface of the outer peripheral edge portion 10. An annular ridge 16 is formed on the upper surface of the top wall 6 and protrudes upward from a boundary region between the central portion 8 and the outer peripheral edge portion 10. On the upper surface of the outer peripheral edge portion 10, a plurality of grooves 18 extending radially from the outer peripheral surface of the annular ridge 16 are arranged at equal angular intervals, and in the illustrated case, six grooves 18 are provided. Instead of providing a plurality of grooves 18, a plurality of ribs can be provided. There is no groove in the outermost peripheral edge 11 of the top wall 10, and the entire outermost peripheral edge 11 is made thinner, and its upper surface is flush with the bottom surface of the groove 18. In the inner region of the annular ridge 16, a breakable thin line indicated generally by reference numeral 20 is provided on the upper surface of the central portion 8 of the top wall 6. In the illustrated embodiment, the breakable thin line 20 includes an arc-shaped main portion 22, a pair of linear addition portions 24 extending slightly from both ends of the arc-shaped main portion 22, and a portion between the pair of linear addition portions 24. Is formed from an arc-shaped additional portion 26 extending from Instead of connecting the pair of linear addition portions 24 with the arc-shaped addition portion 26, the connection can be made with a linear addition portion. The breakable thin line 20 is preferably constituted by a score (groove) formed on the upper surface of the top wall 10. As can be clearly understood by referring to FIG. 3, the score constituting the breakable thin line 20 preferably has a cross-sectional shape that gradually narrows downward. A projection 28 is formed between the pair of straight additional portions 24 of the breakable thin line 20. The projection 28 has a substantially triangular pyramid shape, and has a pair of inclined surfaces 30 inclined downward toward the pair of linear additional portions 24 and an inclined surface 32 inclined downward toward the arc-shaped additional portion 26. The boundary ridge 34 of the pair of inclined surfaces 30 is inclined downward toward the arc-shaped main portion 22. A boundary ridge 36 between each of the pair of inclined surfaces 30 and the inclined surface 32 is inclined downward and extends toward a connection point between each of the pair of linear additional portions 24 and the arc-shaped additional portion 26.
[0012]
Continuing with FIG. 5 in conjunction with FIGS. 1 and 2, the outer lid 4 has an annular wall 38 and a substantially cylindrical skirt wall 40 hanging from the periphery of the annular wall 38. The inner diameter of the annular wall 38 is preferably slightly larger than the outer diameter of the annular ridge 16 of the plug 2. An annular ridge 42 is formed on the lower surface of the annular wall 38. The outer peripheral surface of the skirt wall 40 is formed with a truncated cone-shaped portion 44 inclined downward and radially outward. Above the truncated cone-shaped portion 44, a large number of non-slip protrusions 46 extending in the axial direction are formed on the outer peripheral surface of the skirt wall 40 at circumferential intervals. Immediately below the truncated cone-shaped portion 44, a circumferential rupturable line 48 is disposed, and the skirt wall 40 has a main portion 50 above the circumferential rupturable line 48 and a rupturable line 48. It is partitioned into a lower tamper-evident hem 52. The circumferential breaking line 48 itself has a plurality of bridging portions 54 connecting the main portion 50 and the tamper-evident foot portion 52 at intervals in the circumferential direction. A female thread 56 is formed on the inner peripheral surface of the main part 50. A plurality of interruption portions 58 extending in the axial direction are formed on the female thread 56 at intervals in the circumferential direction. A plurality of locking pieces 60 are formed on the inner peripheral surface of the tamper-evident foot 52 at intervals in the circumferential direction. Each of the locking pieces 60 is extended upward from the inner peripheral surface of the tamper-evident hem 52 toward the inside in the radial direction.
[0013]
As shown in FIGS. 1 and 2, the plug 2 is inserted into the outer lid 4. At this time, the outermost peripheral edge 11 of the top wall 6 of the plug 2 is elastically deformed. When the plug 2 is inserted to a predetermined position in the outer lid 4, the annular wall 38 of the outer lid 4 is located outside the outer peripheral edge 10 of the top wall 6 of the plug 2, more specifically, outside the annular ridge 16. An annular ridge 42 formed on the lower surface of the annular wall 38 is brought into contact with the upper surface of the outer peripheral edge 10 of the top wall 6. The annular ridge 16 of the plug 2 projects into the annular wall 38 of the outer lid 4. The outer peripheral surface of the annular ridge 16 is located facing the inner peripheral surface of the annular wall 38, and there is a slight gap between the two.
[0014]
In FIG. 1, the mouth and neck 62 of the container to which the composite container lid including the plug 2 and the outer lid 4 is applied is also shown by a two-dot chain line. The mouth and neck 62 of the container, which can be made of a suitable synthetic resin such as glass or polyethylene terephthalate, has a substantially cylindrical shape, and its top surface is open. A male thread 64 and a locking jaw 66 located below the male thread 64 are formed on the outer peripheral surface of the mouth and neck 62.
[0015]
When attaching the composite container lid to the mouth and neck portion 62 to seal the mouth and neck portion 62, the composite container lid is fitted over the mouth and neck portion 62 and rotated in the closing direction, ie, clockwise as viewed from above in FIG. Let me know. As a result, the female thread 56 formed on the outer lid 4 is screwed into the male thread 64 formed on the mouth and neck 62, and the composite container lid is lowered with respect to the mouth and neck 62 with rotation. Can be When the female thread 56 is screwed into the male thread 64 as required, the locking piece 60 provided on the outer lid 4 resiliently climbs over the locking jaw 66 of the mouth and neck portion 62 and engages. It is located opposite the lower surface of the jaw 66. The seal ring 12 provided on the plug 2 is inserted into the mouth and neck 62 and is brought into close contact with the inner peripheral surface of the mouth and neck 62, and the seal ridge 14 provided on the plug 2 is The mouth and neck 62 is brought into close contact with the top surface, thus sealing the mouth and neck 62. Since the plug 2 on which the seal ring 12 and the seal ridge 14 are disposed is made of a relatively soft synthetic resin, the mouth and neck 62 is sufficiently sufficiently sealed by the seal ring 12 and the seal ridge 14. You. If desired, in order to prevent dust or the like from entering the upper surface of the inner region of the annular ridge 16 in the plug 2, an annular ridge is formed on the upper surface of the annular ridge 16 or the upper surface of the annular wall 38 of the outer lid 4. A suitable cover piece covering the inner area of the strip 16 can also be applied.
[0016]
In the illustrated embodiment of a composite container lid constructed in accordance with the present invention, the following facts should also be noted. As is well known to those skilled in the art, after attaching the composite container lid to the mouth and neck 62 of the container and sealing the mouth and neck 62, when the beverage is filled in the container, it adheres to the outer peripheral surface of the mouth and neck 62. Although it is often desired to wash the beverage, in the illustrated embodiment, when the cleaning liquid is sprayed from above the composite container lid, the cleaning liquid is applied to the outer peripheral surface of the annular ridge 16 of the stopper 2 and the outer lid. 4, and then flows between the inner peripheral surface of the annular wall 38 and the groove 18 provided on the upper surface of the outer peripheral edge 10 of the top wall 6 of the plug 2 and the outermost peripheral edge 11 of the top wall 6. Flows on the upper surface of the mouth and neck and is introduced to the outer peripheral surface of the mouth and neck 62, and thus the mouth and neck 62 can be sufficiently sufficiently cleaned. If desired, the outer peripheral surface of the annular ridge 16 and the outer peripheral surface of the annular ridge 16 can be sufficiently ensured to allow the cleaning liquid to flow sufficiently between the outer peripheral surface of the annular ridge 16 of the plug 2 and the inner peripheral surface of the annular wall 38 of the outer lid 4. A plurality of grooves or ribs can be formed on the inner peripheral surface of the annular wall 38 at circumferential intervals. Instead of forming the groove 18 or the rib on the upper surface of the outer peripheral edge 10 of the top wall 6 of the plug 2, a groove or a rib may be formed on the lower surface of the annular wall 38 of the outer lid 4.
[0017]
When drinking the beverage contained in the container, as shown by a two-dot chain line in FIG. 1, the tip of the straw 68 is connected to the arc-shaped main portion 22 of the breakable thin line 20 disposed on the stopper 2. By aligning, the straw 68 is forced downward to break at least the arc-shaped main portion 22 of the breakable thin line 20. In this way, a portion surrounded by the arc-shaped main portion 22 of the breakable thin line 20 is used as a hinge with a band-shaped region existing between the pair of linear addition portions 24, or the pair of linear addition portions 24 is also broken. In this case, the portion surrounded by the arc-shaped main portion 22 and the portion between the pair of linear addition portions 24 are displaced downward using the arc-shaped addition portion 26 as a hinge, and the straw 68 is allowed to enter the container. . Therefore, the beverage in the container can be sucked through the straw 68. In the composite container lid constructed in accordance with the present invention, the outer lid 4 is formed of a relatively hard synthetic resin having a relatively large mechanical strength in order to obtain required drop resistance and impact resistance. Since the body 2 is formed of a relatively soft synthetic resin having a relatively small mechanical strength, at least the arc-shaped main portion 22 of the rupturable thin line 20 can be ruptured sufficiently easily. Also, in the illustrated embodiment, the score defining the breakable thin line 20 has a cross-sectional shape that gradually narrows downward, and also a pair of straight lines of the breakable thin line 20. The protrusion 28 provided between the additional portions 24 has a pair of inclined surfaces 30 inclined in a predetermined direction, and the boundary ridge 34 between the pair of inclined surfaces 30 is inclined in the predetermined direction. The tip of the straw 68 is guided to the arc-shaped main portion 22 of the breakable thin line 20, so that the tip of the straw 68 can be sufficiently easily aligned with the arc-shaped main portion 22 of the breakable thin line 20.
[0018]
Further, if desired, the composite container lid can be removed from the mouth and neck 62 to consume the beverage in the container. At this time, a finger is put on the skirt wall 40 of the outer lid 4 to rotate the composite container lid in the opening direction, that is, counterclockwise as viewed from above in FIG. Thus, the composite container lid is moved upward with the rotation by the cooperation of the male thread 64 of the mouth and neck 62 and the female thread 56 of the outer lid 4, but the tamper-evident hem of the outer lid 4 is rotated. Reference numeral 52 denotes a skirt wall of the outer lid 4 which is prevented from moving upward because the locking pieces 60 disposed on the inner peripheral surface thereof are locked by the locking jaws 66 of the mouth and neck portion 62. The circumferential rupturable line 48 formed in 40 is broken, more specifically, a plurality of bridging portions 54 are broken, and the tamper-evident hem 52 is separated from the main portion 50 of the skirt wall 40. Thereafter, the remaining portion of the outer lid 4 and the plug 2 are lifted with rotation and separated from the mouth and neck 62, leaving the tamper-evident foot 52.
[0019]
【The invention's effect】
The composite container lid of the present invention is a synthetic resin container lid in a form that allows a straw to be inserted through the straw without being detached from the mouth and neck of the container and that allows the beverage in the container to be sucked through the straw. In addition to having drop and impact resistance, the rupturable thin line can be broken easily enough and also has sufficient sealing properties.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating a preferred embodiment of a composite container lid constructed in accordance with the present invention.
FIG. 2 is a plan view of the composite container lid of FIG.
FIG. 3 is a sectional view of a plug in the composite container lid of FIG. 1;
FIG. 4 is a plan view of the plug shown in FIG. 3;
FIG. 5 is a diagram showing a part of the outer lid in the composite container lid of FIG.
[Explanation of symbols]
2: plug 4: outer lid 6: top wall 8 of the plug; central part 10 of the top wall: outer peripheral edge 16 of the top surface: annular ridge 18: groove 20: breakable thin line 22: breakable thin The arc-shaped main portion 24 of the line: a pair of linear additional portions 26 of the breakable thin line: an arc-shaped additional portion 28 of the breakable thin line 28: a projection 30: a pair of inclined surfaces 34: a boundary ridge 38 of a pair of inclined surfaces. : Annular wall 40: skirt wall 62: mouth and neck of container

Claims (8)

A synthetic resin plug having a top wall covering the top surface of the mouth and neck of the container, an annular wall covering the outer peripheral edge of the top wall of the plug, and a cylindrical skirt wall hanging down from the periphery of the annular wall. A composite container lid comprising a synthetic resin outer lid having
The stopper and the outer lid are formed of different synthetic resins, the stopper is softer than the outer lid, and a breakable thin line is provided at the center of the top wall of the stopper. A composite container lid, which is provided. The composite container lid according to claim 1, wherein the breakable thin line includes an arc-shaped main portion and a pair of linear additional portions extending from both ends of the arc-shaped main portion. 3. The composite container lid according to claim 2, wherein the breakable thin line includes an arcuate or linear additional portion extending between tips of the pair of linear additional portions. A projecting portion is formed between the pair of linear additional portions of the breakable thin line, and the projecting portion has a pair of inclined surfaces inclined downward toward each of the pair of linear adding portions. 4. The composite container lid according to claim 2, wherein a boundary ridge between the pair of inclined surfaces is inclined downward toward the arc-shaped main portion. 4. The breakable thin line defined by forming a score on an upper surface of the top wall, the score having a cross-sectional shape that gradually narrows downward. 2. The composite container lid according to 1. A plurality of radially extending grooves or ribs are provided on an upper surface of the outer peripheral edge of the top wall of the stopper and / or a lower surface of the annular wall of the outer lid. The composite container lid according to any one of the above. An annular ridge is provided on the top surface of the top wall of the plug, and the outer peripheral surface of the annular ridge faces the inner peripheral surface of the annular wall of the outer lid with a gap. The composite container lid according to any one of claims 1 to 6, wherein the composite container lid is positioned at an angle. The composite container lid according to any one of claims 1 to 7, wherein the stopper is formed from low-density polyethylene, and the outer lid is formed from polypropylene or high-density polyethylene.

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