JP2007161313A - Container lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liner excellent in TE property, constancy of a plug opening torque, flavor-retaining properties, and no oxygen permeability or the like. <P>SOLUTION: A container lid 2 is composed of a shell 4 and a packing member 3. The packing member 3 is composed of a sheet metal substrate 5 to be discoid metal substrate and the packing member 6 disposed on an inner surface of the sheet metal substrate 5. With a container lid 2 mounted to a bottle neck part of the container as required, an outer peripheral edge part of the sheet metal substrate 5 is opposedly positioned at an interval D1 of 0.3 to 3.5 mm above the upper end edge of an inward displacement part 30 of the shell 4. A bead 8c which projects to the packing member 3 side and abuts on the packing member 3 is formed on a top face wall 8 of the shell 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a container lid comprising a metal sheet shell and a packing member, and a skirt wall of the shell provided with a tamper evidence skirt.

As a container for beverages such as coffee, a metal thin plate container in which a curl is formed at an upper end and a male thread and a locking jaw part are formed on an outer peripheral surface is widely used. And the container lid used as a stopper of a container is intended to maintain the quality of the beverage in the container, prevent the container lid from being opened intentionally by a third party who does not intend the beverage.
That is, the container lid is provided with a resin liner in order to maintain hermeticity with the container mouth. Some liners are embossed on the top wall (bottom) of the container lid by a mold and attached integrally with the container lid, and others are installed in the container lid separately from the container lid.
The PP (Pilfer Proof) container lid has a TE (tamper evidence) band with a perforated break line in the circumferential direction at the bottom of the skirt of the container lid so that the intentional opening can be seen. Things are known. That is, when the container lid is rotated and opened, the TE band is broken, so that the opening of the container lid can be easily recognized.
JP-A-2004-284607 Japanese Patent Publication No. 5-67505 JP-A-8-2545 JP 2003-321040 A

When a TE band is provided on a liner embossed by a mold among the container lids, the TE band is first cut when the container lid of the container is opened. In the case where the liner is integrally formed with a mold, the rotation of the container lid and the liner starts simultaneously because the liner is in close contact with the top wall of the container lid. Then, before the TE band breaks, the container mouth and the liner leak, and the initial TE property cannot be achieved.
With respect to the opening torque when the container lid is opened, the liner that has been embossed varies depending on the storage temperature of the container and the type of liquid in the container.

Furthermore, when molding the liner on the container lid, it is necessary to select a material that retains the flavor of the contents (flavor retention) or a material that has low oxygen permeability that prevents oxygen from entering the container from the outside. is there.
This invention is made | formed in view of such a situation, Comprising: TE property, flavor retention property, non-oxygen permeability, etc. Moreover, especially the container lid excellent in the fixedness of opening torque property is provided. This is the issue.

In order to solve the above-mentioned problems, the present invention comprises a thin metal plate shell and a packing member, the shell having a top wall and a skirt wall depending from the periphery of the top wall. A main portion above the circumferential break line extending in the circumferential direction and a tamper evidence skirt below the circumferential break line are partitioned, and the skirt wall is formed on the upper portion of the main portion. In a container lid formed by forcing inward in the radial direction and generating an inward displacement portion in the circumferential direction of the skirt wall, the packing member has a disk shape and is composed of at least a synthetic resin liner And inserted into the shell and positioned adjacent to the top wall, and a sliding member is interposed between the shell and the packing member.
In order to solve the above problems, the present invention comprises a shell made of a thin metal plate and a packing member, the shell having a top wall and a skirt wall depending from the periphery of the top wall, and the skirt wall Is divided into a main part above the circumferential break line extending in the circumferential direction and a tamper evidence hem part below the circumferential break line, and the skirt is formed above the main part. It is formed by forcing the wall radially inward to generate an inward displacement portion in the circumferential direction of the skirt wall, and the packing member is composed of at least a synthetic resin liner, inserted into the shell, and In the container lid positioned adjacent to the top wall, a bead that protrudes toward the packing member side and contacts the packing member is formed on the top wall of the shell.
In the above invention, a sliding member may be interposed between the shell and the packing member.
The sliding member of the present invention may be interposed by covering at least the inner surface side top surface of the shell or the outer surface side of the packing member.
The packing member of the present invention is preferably composed of a thin metal plate substrate and a synthetic resin liner.
An aluminum alloy is used for the thin metal plate substrate of the invention, and the skirt wall forms a plurality of air holes at intervals in the circumferential direction, and each of the air holes has a lateral slit extending substantially horizontally. In the state where the inner displacement portion is formed by forcing the lower portion of the transverse slit radially inward, and the packing member is mounted on the mouth neck of the container of the packing member as required. The outer peripheral edge portion of the shell is located opposite to the upper end edge of the inner displacement portion of the shell with a distance D1 of 0.3 to 3.5 mm, and the minimum inner peripheral edge of the inner displacement portion of the shell. The diameter of the outer peripheral edge of the packing member is formed larger than the diameter of the packing member, and the outer peripheral edge of the packing member and the minimum of the inward displacement portion of the shell in a state where the packing member is mounted on the mouth and neck of the container The radial distance D2 from the inner periphery is 0.1 to 1.0 mm. Than the diameter of the synthetic resin liner can be formed larger diameter of the sheet metal substrate.

The container lid according to the present invention includes a shell made of a thin metal plate and a packing member, and the shell has a top wall and a skirt wall depending from the periphery of the top wall, and the skirt wall extends in the circumferential direction. A main portion above the circumferential break line and a tamper evidence skirt below the circumferential break line, and the skirt wall is radially inward at the top of the main portion. In the container lid formed by forcibly generating an inward displacement portion in the circumferential direction of the skirt wall, the packing member has a disk shape and is composed of at least a synthetic resin liner, and the shell Since the sliding member is interposed between the shell and the packing member, it is inserted into the top wall and further placed on the container mouth by the synthetic resin liner having excellent adhesion. Maintains hermeticity In addition, by interposing a sliding member with excellent sliding property between the top wall of the metal thin plate shell and the packing member, the frictional force between the top wall and the packing member can be reduced, and the opening torque can be reduced. The container lid can be easily removed.
The container lid of the present invention includes a thin metal plate shell and a packing member, and the shell includes a top wall and a skirt wall depending from the periphery of the top wall, and the skirt wall has a circumferential direction. The main part above the extending circumferential break line and the tamper evidence hem below the circumferential break line are partitioned. The upper part of the main part has the skirt wall in the radial direction. The packing member is composed of at least a synthetic resin liner and is inserted into the shell and adjacent to the top wall. Since the bead that protrudes toward the packing member and contacts the packing member is formed on the top wall of the shell, the contact area with the packing member is reduced, so that the top wall and the packing are positioned. Friction between the emission member is reduced, cap removal torque becomes less.
In the above invention, since the sliding member is interposed between the shell and the packing member, the effects of the invention described above can be combined.
In the above invention, since the sliding member is interposed by covering at least the inner surface side top surface of the shell or the outer surface side of the packing member, the sliding member can be easily incorporated. This is particularly effective when the sliding member is a thin film.
Furthermore, in the above invention, since the packing member is composed of a thin metal plate substrate and a synthetic resin liner, the packing member is provided with a metallic substrate so that when the cover is removed, the packing member is a shell skirt wall. It is possible to prevent the packing member from being bent and slipping out of the inwardly displaced portion due to the rigidity of the metal thin plate substrate when it is lifted by hanging on the inner displaced portion of the metal thin plate. An aluminum alloy is used for the substrate, and the skirt wall is formed with a plurality of air holes spaced circumferentially, each of the air holes forming a lateral slit extending substantially horizontally, The displacement part is formed by forcing the lower part of the horizontal slit inward in the radial direction, and the outer periphery of the packing member is attached to the mouth and neck of the container of the packing member as required. The edge portion is located above the upper edge of the inner displacement portion of the shell, with a distance D1 of 0.3 to 3.5 mm facing each other, and the diameter of the minimum inner peripheral edge of the inner displacement portion of the shell. The outer peripheral edge of the packing member is formed to have a larger diameter, and the outer peripheral edge of the packing member and the minimum inner peripheral edge of the inner displacement portion of the shell in a state where the packing member is attached to the mouth and neck of the container. The radial distance D2 is 0.1 to 1.0 mm, and the diameter of the thin metal plate substrate is larger than the diameter of the synthetic resin liner. By forming the inward displacement portion by forcing the lower portion of the horizontal slit inward in the radial direction, the vent hole inward displacement portion conventionally formed in the aluminum container lid can be utilized. By opening D1 within the above dimensional range, when the lid is opened, the tamper evidence hem portion is surely released after being broken by the circumferential break line, so that the opening is performed. It can be reliably confirmed by the breakage of the circumferential break line provided above the tamper evidence skirt. By accommodating D2 within the above-mentioned size range, it is easy to insert the packing member of the container lid over the inner displacement portion of the shell, and the inserted packing member is securely engaged by the inner displacement portion of the shell, It is possible to reliably prevent the plug member from being plugged. By making the diameter of the thin metal plate substrate larger than the diameter of the synthetic resin liner, it is possible to hang the rigid thin metal plate substrate on the inward displacement part, so that the plug plug remains on the packing member more securely. Can be prevented.

Hereinafter, a container lid according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a half sectional view before the container lid of the present invention is attached to the container, FIG. 2 is an exploded perspective view of the container lid, and FIG. 3 is a partial sectional view of the state where the container lid is attached to the container.
The container lid 2 according to the present invention includes a shell 4 integrally formed from a thin plate made of aluminum or an aluminum alloy, and a packing member 3 formed separately from the shell 4.
The shell 4 has a bottomed cylindrical shape, and includes a circular top wall 8 and a skirt wall 10 that is suspended from the periphery of the top wall 8 and has a cylindrical shape as a whole. The top wall 8 is located at the outer peripheral side and extends substantially horizontally at the annular peripheral edge 8a, the inverted frustoconical intermediate part 8b, and the center of the top wall 8 and extends substantially horizontally. A central immersive portion 8c that is immersive to the portion. An annular bead 8d that protrudes downward is formed on the annular peripheral edge 8a.

A circumferential break line 12 is formed in the lower part of the skirt wall 10 of the shell 4, and the skirt wall 10 is positioned below the circumferential break line 12 and a main portion 14 located below the circumferential break line 12. And a tamper-evidence skirt 16 to be divided.
An annular bulging portion 18 is formed at the lower part of the skirt wall 10, and a slit 20 extending in the circumferential direction with a gap in the circumferential direction at the lower part of the annular bulging portion 18 and a bridge existing between the slits 20. It is comprised from the tangle part 22, and the circumferential direction fracture | rupture line 12 is formed by these.
A plurality of vent holes 26 are disposed at an upper portion of the main portion 14 of the skirt wall 10 at intervals in the circumferential direction. Each of the air holes 26 forms a lateral slit 28 that extends substantially horizontally at intervals in the circumferential direction, and an inward displacement portion 30 that is forced radially inward is formed below the lateral slit 28. Is formed.

As shown in FIG. 2, the packing member 3 includes a thin plate substrate 5 and a packing 6.
The thin plate substrate 5 is made of aluminum or an aluminum alloy and has a tensile strength (TS) of 50 to 400 MPa and an elongation of 1% or more. The thickness of the thin substrate 5 is 10 μm to 0.40 mm. Since the thin board | substrate 5 is a mechanism in which the inward displacement part of the container lid 2 lifts the thin board | substrate 5, it is essential that it has the intensity | strength more than a fixed level. The thin substrate 5 is provided with organic resin coatings on the inner and outer surfaces to prevent wrinkling at the time of molding the material, prevent aluminum buildup on the tool, and provide corrosion resistance of the aluminum material. Specifically, the organic resin film may be an epoxy phenol resin, a solvent paint such as vinyl paint, a water-soluble aqueous paint such as epoxy acrylic, a laminate of a polyester thermoplastic resin film, or the like.

  The packing 6 made of a soft resin layer is formed on the thin substrate 5 by a method such as molding (injection molding), injection molding, or spraying and applying resin from a nozzle, such as a lid sealing compound. . As the hardness of the soft resin, a resin having a range of 10 or more according to (JISK6253) in a type A durometer vulcanized rubber hardness test method and 80 or less according to a type D durometer is used. Examples of the resin used include thermoplastic elastomers such as styrene elastomers, polyurethane elastomers, polyester elastomers, and olefin elastomers, and thermoplastic resins that can be used include olefin resins and styrene resins. In addition, about the molding method of packing, the method of patent document 3 or 4 etc. can be used.

  The shape of the thin substrate 5 is formed in a shape substantially along the inner surface of the top wall 8 of the container lid 2. On the outer peripheral side of the thin plate substrate 5, an annular peripheral edge 5 a that is positioned on the inner surface of the annular peripheral edge 8 a of the top wall 10 of the shell 4 and extends substantially horizontally, and an inverted cone positioned on the inner surface of the intermediate part of the shell 4. It has a trapezoidal intermediate portion 5b and a central immersive portion 5c that is disposed at the central portion of the thin substrate 5 and extends substantially horizontally and is immersive to the peripheral edge portion.

  The packing 6 has a disk shape as a whole, and has a peripheral portion 32a extending substantially horizontally, an inverted frustoconical intermediate portion 32b, and a substantially horizontal immersion center portion 32c. Two seal rings of an annular outer seal ring 36 and an annular inner seal ring 38 depending on the lower surface of the peripheral edge portion 32a of the packing 6 are formed. The outer seal ring 36 is disposed inwardly along the peripheral edge of the thin plate substrate 5, and the inner seal ring 38 is located radially inwardly with respect to the outer seal ring, It hangs down longer than the ring 36. An annular groove 37 is formed between the outer seal ring 36 and the inner seal ring 38.

  FIG. 3 shows the mouth / neck portion 42 of the container 1 to which the container lid 2 is mounted together with the container lid 2 described above. The container 1 can be formed from a chromate-treated steel sheet, an aluminum-based alloy sheet or a tin sheet. The mouth-and-neck part 42 of the container 1 has a substantially cylindrical shape as a whole, and a male thread 44 is formed at the center in the axial direction, and a locking jaw part having an annular bulging shape is formed below the male thread 44. 46 is formed. The upper part of the mouth and neck part 42 has a truncated cone shape whose diameter gradually decreases upward, and an outer curl 48 is formed at the upper end of the mouth and neck part 42. The curl 48 is formed in the mouth-and-neck portion 42 so that the tip thereof is curved in a circular arc shape further downward from the outside in the radial direction of the mouth-and-neck portion 42 to have a substantially circular shape.

As shown in FIG. 1, the packing member 3 is disposed between an inward displacement portion 30 formed on the skirt wall 10 of the shell 4 and the top wall 8, and the packing member 3 is a peripheral edge of the thin plate substrate 5. The portion is restricted by the upper edge portion of the inner displacement portion 30, and cannot be pulled out toward the opening of the shell 4 than the inner displacement portion 30. However, when the packing member 3 is set in the shell 4, the peripheral portion of the thin plate substrate 5 is curved outward and downward, so that the inner displacement portion 30 can be passed. The packing member 3 is loosely fitted between the top wall 8 and the inward displacement portion 30, and can move up and down between them.
As shown in FIG. 4, in a state where the container lid 2 is attached to the mouth-and-neck part 42 of the container as required, there is a gap between the upper edge of the inner displacement part 30 of the shell 4 and the lower peripheral edge of the thin plate substrate 5. It is important that a distance D1 of 0.3 to 3.5 mm is formed. The radial distance D2 between the outer peripheral edge of the thin substrate 5 and the minimum inner peripheral edge at the upper end edge of the inner displacement portion 30 of the shell 4 is preferably 0.1 to 1.0 mm.

An example of the mounting operation for mounting the container lid 2 on the container's mouth / neck part 42 and sealing the mouth / neck part 42 is as follows.
When the content to be filled in the container is coffee, normally, after filling the container with coffee, nitrogen gas is introduced into the container to remove the air in the upper end of the container from the container. At the same time, water vapor is introduced into the container, and then the container lid 2 is fitted to the mouth and neck part 42. When the water vapor is liquefied due to the temperature drop, the inside of the container fitted with the container lid 2 is in a reduced pressure state, and the container lid 2, particularly the packing 6 (packing member 3) is sucked by the reduced pressure, as shown in FIG. In this way, the inner seal ring 38 of the packing 6 enters the mouth and neck portion 42, and thus the mouth and neck portion 42 is temporarily sealed.

  Next, as shown in FIG. 5, the pressing tool 50 having a flat annular lower surface is pressed against the top wall 8 of the shell 4, and the pressing tool 52 having a shoulder portion 54 facing downward is connected to the top wall 8 and the skirt wall 10. Acting on the boundary between the two and the like, and immersing the boundary downward and radially inward. Thus, the inner peripheral surface of the outer annular seal ring 36 of the packing 6 is brought into close contact with the upper portion of the outer peripheral surface of the outer curl 48 of the mouth / neck portion 42, and the mouth / neck portion 42 is sealed. Thereafter, a thread forming tool 56 is further applied to the skirt wall 10 of the shell 4 to form a female thread 58 along the male thread 44 of the mouth and neck portion 42 downward. Further, a locking tool 60 is applied to the lower part of the tamper-evidence skirt 16 of the skirt wall 10 to force the lower part of the tamper-evidence skirt 16 radially inward to lock the jaws of the mouth-neck part 42. 46 is locked.

  When the container neck and neck portion 42 is opened and the contents are consumed, the shell 4 of the container lid 2 is rotated in the opening direction. By the cooperation of the male thread 44 of the mouth / neck portion 42 and the female thread 58 of the shell 4, the shell 4 is raised with rotation. The tamper-evidence skirt portion 16 of the shell 4 is prevented from rising because it is locked to the locking jaw portion 46 of the mouth-and-neck portion 42, and thereby the circumferential break line formed in the skirt wall 10 of the shell 4. A considerable stress is generated in the 12 bridging portions 22, and the circumferential break line 12 is broken. At the time of breakage, the packing 6 of the packing member 3 that is in close contact with the mouth and neck portion 42 is formed separately from the shell 4, so that the packing 6 that is in close contact with the mouth and neck portion 42 is rotated. Only the shell 4 can be rotated. In addition, since the packing member 3 is made of aluminum and resin, it has excellent deformation resistance against storage atmosphere temperature and high internal pressure as compared with a resin-only liner, so that stable opening performance can be obtained. Furthermore, as shown in FIG. 4, since the annular bead 8 d is formed on the top wall 8 of the shell 4, only the annular bead 8 d is in line contact with the upper surface of the thin plate substrate 5 to reduce friction and reduce the container lid 2. The circumferential break line 12 can be easily broken without requiring an excessive opening torque.

  After the circumferential break line 12 is broken, the top wall 8 of the shell 4 and the main portion 14 of the skirt wall 10 are raised with rotation, leaving the tamper evidence skirt 16. When the top surface wall 8 of the shell 4 and the main portion 14 of the skirt wall 10 are raised over the distance D1, the upper edge of the inward displacement portion 30 generated in the shell 4 is the peripheral edge of the thin plate substrate 5. It is contact | abutted to the lower surface of. Next, the packing member 3 is also raised in association with the elevation of the top wall 8 of the shell 4 and the main portion 14 of the skirt wall 10, so that the packing 6 is separated upward from the mouth-and-neck part 42, thereby sealing the mouth-and-neck part 42. Canceled. Then, the packing member 3 is detached together with the top surface wall 8 of the shell 4 and the main portion 14 of the skirt wall 10 from the mouth and neck portion 42, and the mouth and neck portion 42 is opened.

  The packing 6 is separated upward from the mouth-and-neck portion 42 and the sealing of the mouth-and-neck portion 42 is released. The circumferential break line 12 in the shell 4 is broken, and the top wall 8 and the skirt wall 10 of the shell 4 are main. Since the portion 14 has been raised over the distance D1, and the sealing of the mouth-and-neck portion 42 is not released prior to the breakage of the circumferential break line 12, the TE property is ensured. Further, each of the thin plate substrate 5 and the inner displacement portion 30 of the shell 4 is made of metal and is made of only resin, so that the liner passes over the inner displacement portion 30 and becomes the mouth and neck portion 42. There is no remaining. In this respect, since the strength of the resin packing 6 is not a problem, the range of material selection is expanded.

When only a part of the contents of the container is consumed, together with the top wall 8 of the shell 4 and the main part 14 of the skirt wall 10 separated from the mouth and neck, the packing 6 held in the inside is put into the mouth and neck. The female screw 58 of the shell 4 is re-engaged with the male screw 44 of the mouth-and-neck part 42, and thus the mouth-and-neck part 42 can be temporarily sealed.
In the case of the resin packing, when the container 1 is dropped, the packing of the container lid 2 generally becomes extremely thin or cut off due to the drop impact, and as a result, This leads to leakage of the contents of the container. Since the packing member 3 in this embodiment receives the packing 6 as a sealing material with the whole thin board | substrate 5 at the time of a drop impact, it can ensure fall tolerance.
With respect to flavor and oxygen permeability, it is possible to use a sealing material formed by molding, injection molding, lining method, etc., and therefore, materials suitable for them can be widely selected.

7 and 8 show a second embodiment of the container lid of the present invention. The same parts as those in the first embodiment are described with the same reference numerals.
In the present embodiment, the bead 8d is not formed on the top wall 8 of the container lid 2, and only the shape of the packing member 3 is different.
As shown in FIG. 2, a flat plate-like and annular sliding member 7 is covered on the outer surface side of the thin plate substrate 5 of the packing member 3. Specifically, the sliding member 7 is provided on the annular peripheral edge 5a located outside the thin plate substrate 5, and the width is preferably as narrow as possible although it depends on the strength of the sliding member 7. The sliding member 7 is made of a resin-made material with little friction. As a material, polyester resin such as PET, polyethylene, or silicon can be used.
The sliding member 7 can be attached to the thin plate substrate 5 by using heat fusion or an adhesive.
Furthermore, as shown in FIG. 9, the outer diameter of the sliding member 7 is formed to be slightly smaller than the inner diameter of the skirt wall 10 of the shell 4 and is inserted into the shell 4 together with the packing member 3. The welding with the thin plate substrate 5 may be omitted. In addition, coating and application are possible, and a lubricant may be mixed in the paint and applied.
About the other shape of the packing member 3, it is the same as the above-mentioned 1st Embodiment.

  In the present embodiment, since the sliding member 7 is provided on the container lid 1 in this way, the sealing to the container mouth by the packing 6 having excellent adhesion is maintained, and the top wall 8 of the container lid 2 and the thin plate are made. A sliding member 7 having excellent slipperiness is interposed between the substrate 5 and the friction force between the sliding member 7 and the top wall 8 and / or the thin plate substrate 5 directly on the ceiling 5 without using the sliding member 7. It can be reduced by the frictional force when the face wall 8 and the thin substrate 5 are brought into contact with each other. As a result, the opening torque of the container lid 2 is reduced and can be easily removed. This effect is particularly effective when the thin plate substrate 5 of the packing member 3 is made of the same material as that of the shell 4 as in this embodiment, but it may be made of a different material, and the thin plate substrate 5 of the packing member 3 The same effect can be obtained by interposing only the packing 6 in the inner plug. About others, it has an effect similar to the effect except the bead 8d of the above-mentioned embodiment.

Although the embodiments of the present invention have been described above, the present invention can be variously modified and changed based on the technical idea of the present invention.
In the above embodiment, a plurality of vent holes 26 are formed at intervals in the circumferential direction of the skirt wall 10, and a lateral slit 28 is formed in each of the vent holes 26 and forced inward in the radial direction. An inward displacement portion 30 was formed. As shown in FIG. 9, the inward displacement portion 30 may be a concave groove 30 a formed on the radially inner side in the circumferential direction of the skirt wall 10.
For example, in the above embodiment, the bead 8d that protrudes toward the packing member 3 is formed on the top wall 8 of the shell 4, and the beat 8d is brought into contact with the surface of the thin plate substrate 5. A bead that is brought into contact with the top wall 8 may be formed.
In the present embodiment, the outermost diameter portion of the packing member 3 is the thin plate substrate 5. However, the outermost diameter portion may be the packing 6, or the packing 6 and the thin plate substrate 5 are equal. It may have an outer diameter. Furthermore, the sliding member 7 is not limited to the ring shape but may be a disk shape.

It is an expanded partial sectional view before the container lid of the 1st Embodiment of this invention is mounted | worn with a container. It is a disassembled perspective view of the container lid of FIG. FIG. 2 is a partially enlarged cross-sectional view of a state in which the container lid of FIG. 1 is attached to the container as required. It is an expanded sectional view of the outer peripheral part of the top surface wall of the container lid of FIG. It is an expanded partial sectional view which shows the state which set the pressing tool to the container lid of FIG. 1, and sealed the curl part with the packing member. FIG. 6 is an enlarged partial sectional view of FIG. 5. It is an expanded partial sectional view (equivalent to FIG. 1) before the container lid of the 2nd Embodiment of this invention is mounted | worn with a container. It is a disassembled perspective view of the container lid of FIG. It is a modification of the container lid of embodiment of this invention, Comprising: It is an expanded partial sectional view before a container lid is mounted | worn with a container.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container 2 Container lid 3 Packing member 4 Shell 5 Thin board 6 Packing 7 Sliding member 8 Top wall 8d Bead 10 Skirt wall 12 Circumferential rupture line 16 Damper evidence hem part 26 Vent hole 30 Inward displacement part 30a Concave groove ( Inward displacement part)
42 mouth and neck

Claims (6)

The shell is made of a thin metal plate shell and a packing member, and the shell has a top wall and a skirt wall depending from the peripheral edge of the top wall, and the skirt wall has a circumferential break line extending in the circumferential direction. An upper main part and a tamper evidence skirt part below the circumferential break line are partitioned, and the upper part of the main part is configured to force the skirt wall inward in the radial direction. In the container lid formed by generating the inward displacement portion in the circumferential direction,
The packing member is disc-shaped and is composed of at least a synthetic resin liner, inserted into the shell and positioned adjacent to the top wall,
Furthermore, a sliding member is interposed between the shell and the packing member. The shell is made of a thin metal plate shell and a packing member, and the shell has a top wall and a skirt wall depending from the peripheral edge of the top wall, and the skirt wall has a circumferential break line extending in the circumferential direction. An upper main part and a tamper evidence skirt part below the circumferential break line are partitioned, and the upper part of the main part is configured to force the skirt wall inward in the radial direction. A container lid formed by generating an inward displacement portion in a circumferential direction, wherein the packing member is composed of at least a synthetic resin liner, and is inserted into the shell and positioned adjacent to the top wall. ,
A container lid, characterized in that a bead that protrudes toward the packing member side and contacts the packing member is formed on the top wall of the shell.   The container lid according to claim 2, wherein a sliding member is interposed between the shell and the packing member.   4. The slide member according to claim 1, wherein the sliding member is interposed by being coated on at least an inner surface side top surface of the shell or an outer surface side of the packing member. 5. Container lid.   The container lid according to any one of claims 1 to 4, wherein the packing member includes a thin metal plate substrate and a synthetic resin liner. An aluminum alloy is used for the thin metal plate substrate,
The skirt wall forms a plurality of ventilation holes at circumferential intervals, each of the ventilation holes forms a horizontal slit extending substantially horizontally, and the inward displacement portion forms a lower portion of the horizontal slit. Forcibly formed radially inward,
In a state where the packing member is mounted on the mouth and neck of the container as required, the outer peripheral edge of the packing member is spaced above the upper edge of the inward displacement portion of the shell by a distance D1 of 0.3 to 3.5 mm. Located opposite each other,
The outer peripheral edge of the packing member is formed larger in diameter than the minimum inner peripheral edge of the inner displacement portion of the shell, and the packing member is attached to the mouth and neck of the container. The radial distance D2 between the portion and the minimum inner peripheral edge of the inner displacement portion of the shell is 0.1 to 1.0 mm,
6. The container lid according to claim 5, wherein the diameter of the thin metal plate substrate is larger than the diameter of the synthetic resin liner.

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