JP2002145294A - Cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cap wherein a packing can be easily and reliably removed from a cap body to contribute to separate resource recovery regardless of limitation in materials of the cap body or the packing. SOLUTION: The cap for sealing a mouth of a container comprises at least a cap body 4 including a top plate 2 and a skirt 3 provided around a periphery thereof, and a packing 5 mounted in the cap body 4. A packing 5 includes a removal member 6 which can remove the packing 5 from the cap body 4. The removal member is only pulled after use of the cap, thereby easily removing the packing from the cap body. Alternatively, a recess is formed on an inner side of the cap top plate, and a weakened line is formed on the packing, wherein the cap is pressed from the exterior of the cap top plate, thereby breaking the weakened line by pressing force and removing the packing from the cap body. It is preferable to form the packing and/or the removal member by injection-molding or embossing a resin blended with an oxygen absorbing agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap in which a packing is mounted in a cap body, and more particularly to a cap which facilitates removal of a packing from a used cap body and which can be separated and collected.

[0002]

2. Description of the Related Art A cap to be adhered to the opening of a container such as a bottle has at least a cap body having a skirt portion connected to the periphery of a top plate and a packing mounted in the cap body. This maintains the sealing of the mouth of the container. For example, as containers, plastic bottles, glass bottles, metal cans, and the like are often used depending on the application, and metal or plastic caps are often used as the caps. Many caps are provided with a packing inside to provide a sealing property, and plastics or rubbers having sufficient elasticity are used due to the requirement of the sealing property.

[0003] On the other hand, from the standpoint of preserving the global environment, recycling of resources is progressing, and local governments are carrying out separate collection of containers including caps. Therefore, it is necessary to remove the packing of the plastic material or the rubber material from the metal cap body in order to respond to the separated collection. However, conventional caps do not adhere to the top plate so that the plastic or rubber packing does not come off easily from the inside of the cap body because the cap body and the packing are capped in the container mouth in an integrated state. It fits into the concave part in the cylinder. For this reason, it is difficult to easily remove the packing from inside the cap body even when trying to separate and collect.

[0004] Under such circumstances, a container cap made entirely of metal up to the container, the cap body, and the packing is known so as to eliminate the necessity of separation and recovery (see Japanese Patent Application Laid-Open No. 11-193441). ).

Although not intended for separation and recovery, the packing is adhered to the cap body so that the packing can be peeled off, and the packing is provided with a detachable weakening line, so that the back surface of the packing and the top plate of the cap body are removed. When confirming the display of a prize drawn inside, a packing is detached from a cap main body by a peeling operation piece formed by cutting off the weakening line (Japanese Utility Model Publication No. 55-51250). reference).

Further, a recess is formed inside the top plate of the cap body. When confirming the display of the prize in the same manner as above, the packing is pushed into the recess so that the packing is deformed and removed from the cap body. And
It is known that a part of the packing is provided with a weakening line, and the packing is deformed or broken by the weakening line to remove the packing from the cap body (see Japanese Patent Application Laid-Open No. 187560/1984).

Further, the packing can be grasped by hand, and a projection connected to the packing via a hinge is provided. Similarly, when the display of the prize is confirmed, the projection is grasped and the cap body is grasped. (Japanese Patent Laid-Open No. 59-1)
87562).

[0008]

However, in the above-mentioned known example, the metal packing has a hollow portion made of a special metal, and air is sealed in the hollow portion.
There is a problem that it becomes expensive in terms of price. Therefore, it can be used for containers with high value-added contents, but it is difficult to use it for ordinary containers because of its cost.Furthermore, it cannot be used when the contents are not compatible with metal containers. It is.

Further, in the known example, since the peeling operation piece is formed by separating from the packing along the line of weakness, there is a drawback that the packing is not easily removed from the cap main body without an initial work. Further, there is a case in which a gripping piece is protruded in advance on the peeling operation piece, but the packing having the gripping piece is made of a packing material having sufficient elasticity and being restricted by the contents of the container. It is not easy.

In the known example, the packing is removed from the cap body by pressing the center part of the packing toward the concave portion of the cap body with a finger, which is convenient. Since it is necessary to provide a moderate concave portion, it is not applicable to a cap body without a concave portion, accompanied by a change in manufacturing equipment for the cap body, and further, the height dimension is increased by the concave portion,
Concerns arise that must be changed during storage and transport.

In the known example, there is an advantage that the packing can be removed from the cap body by the projections which can be gripped by fingers with the packing. However, since this projection is connected to the packing via the hinge, it is not easy to make the packing having this projection from a packing material having sufficient elasticity, as in the known example. However, there is a problem that it is likely to be expensive.

Further, in the case where the projection is formed by cutting the center of the packing into a tongue-like shape, a hole is present in the center of the packing from the beginning, and when a shock is applied, the projection is formed. In addition to the possibility that outside air may flow into the cap through the hole and impair the sealing in the container, there is a concern that the cap body may corrode depending on the type of the contents in the container. Further, the contents are wrapped around the back side through the hole of the packing, and when the cap is removed from the container, there is a possibility that a large amount of the contents adhere to the cap side.

Therefore, the object of the present invention is not limited to the material of the cap body or the packing material, and the processing is facilitated because of the simple structure, and the packing from the cap body is easily and reliably performed without changing the shape of the cap body. It is an object of the present invention to provide a cap which can remove the nut and increase the fruit of the separation and collection.

[0014]

Means for Solving the Problems The present invention has been proposed to achieve the above object, and has the following structure. That is, according to the present invention, in a cap for sealing a container mouth portion having at least a cap body having a skirt portion connected to the periphery of the top plate and a packing mounted in the cap body, A cap provided with a detaching member for detaching the cap from the cap body is provided.

Further, according to the present invention, there is provided the above-mentioned cap, wherein the packing is formed by injection molding or embossing a resin containing an oxygen absorbent, and is inserted into a cap body.

Further, according to the present invention, there is provided the above cap, wherein the removing member provided on the packing is a knob protruding toward the inner surface side of the cap body.

Further, according to the present invention, there is provided the above-mentioned cap, wherein the detaching member is formed by injection molding or embossing a resin containing an oxygen absorbent, and is fixed to the packing.

Further, according to the present invention, there is provided the above cap, wherein a weakening line for removing the packing from the cap body is formed in a part of the packing located around the detaching member.

According to the present invention, there is provided a cap for sealing a container mouth portion, the cap having at least a cap body having a skirt portion connected to the periphery of the top plate and a packing mounted in the cap body. A cap is provided, wherein a recess is formed inside the top plate of the cap body, and a weakening line for removing the packing from the cap body is formed in a part of the packing on the radially inner peripheral side of the recess. You.

Further, according to the present invention, there is provided the above-mentioned cap, wherein the packing is formed by injection molding or embossing a resin containing an oxygen absorbent, and is inserted into a cap body.

According to the present invention, the oxygen-absorbing agent-containing resin is injection-molded or provided inside a weakening line provided on a part of the packing on the inner peripheral side of the concave portion for removing the packing from the cap body. The cap is provided in which an oxygen absorbing member formed by stamping is fixed to the packing.

Further, according to the present invention, there is provided the above-mentioned cap, wherein the layer of the molded article of the oxygen-absorbing compound-containing resin has a large number of ribs and / or a large number of annular uneven portions extending radially from the center. Is done.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. The present invention has an important feature in a configuration in which the packing in the cap is easily detached. In general, an aspect in which a detaching member is provided in a part of the packing and the packing is detached from the cap by pulling the detaching member (claim) Claims 1 to 5) and forming a concave portion on the inner surface of the top plate of the cap, forming a weakening line in a part of the packing, and pressing the inside of the weakening line along the concave portion, The packing is broken from the weakened line portion by the pressing force, and the packing is easily removed from the cap (claims 6 to 9).

FIG. 1 is a side view in which a part of a cap according to the first embodiment of the present invention is cut away, and FIGS. 2 and 3 are plan views of a packing constituting the cap of FIG. In the figure, a cap 1 has at least a cap body 4 provided with a skirt portion 3 connected to the periphery of a top plate 2 and a packing 5 mounted in the cap body 4 to seal a container mouth. A detaching member 6 for detaching the cap 5 from the cap body 4 is fixed to the packing 5.

After the contents of the cap 1 are filled in the container, the cap 1 is attached to the mouth thereof and sealed by the packing 5 to obtain a final product. Opening of the cap 1 is performed by holding the cylindrical body 3 of the cap body 4 with a finger and continuing to rotate in the opening direction to remove the cap body 4 from the container opening.

On the outer peripheral surface of the skirt portion 3 of the cap body 4, a knurl 10 composed of a set of a large number of ridges engraved in the axial direction of the cap body 4 so that the cap body 4 can be strongly turned in the opening direction with fingers. When the cap is opened, a frictional force is applied between the cap and the fingers when the cap is opened, so that the cap can be opened smoothly. This narl 1
A concave portion 11 is provided on the outer periphery of the skirt portion 3 of the cap main body 4 continuously from 0, and the packing 5 is fitted into a space between the concave portion 11 and the top plate 2.

The packing 5 is a disk-shaped disc punched from a sheet material and is loaded into the cap shell. The packing 5 is formed by insert injection molding of a thermoplastic resin into the cap shell, or a thermoplastic resin or synthetic rubber. May be applied to the inside of a cap shell, and then molded into the cap shell by embossing in which this is pressed with a pressing die. The material of the packing 5 is not particularly limited, but preferred examples thereof include a resin or rubber having closed cells, such as low-, medium-, high-density polyethylene, and ethylene-vinyl acetate copolymer. And polyolefins such as ethylene-propylene copolymers and polypropylene, polystyrene, vinyl chloride resin, polyurethane, styrene-butadiene rubber, natural rubber and other foams, and the like, and polyolefin foams are particularly preferable. The expansion ratio of the foam can be changed as appropriate, but usually, a ratio of 1.5 to 25 times is preferably used.

Other examples of the packing material include paper, cork board, natural rubber, butadiene rubber, and styrene-
Examples of the elastomer include butadiene rubber, nitrile-butadiene rubber, polyurethane, butyl rubber, ethylene-propylene rubber, and soft vinyl chloride resin. These packing materials can be used alone or in layers.

[0029] Claim 2 of the present invention defines an embodiment in which the packing material is formed by injection molding or embossing a resin mixed with an oxygen absorbent. This defines an embodiment in which the detaching member 6 is formed by injection molding or stamping a resin containing an oxygen absorbent.

Packing 5 and / or removing member 6
Is molded from an oxygen-absorbing compound-containing resin,
In addition to providing the sealing effect of the cap and / or the ease with which the packing portion can be removed at the time of sorting and collecting, oxygen in the container can be absorbed and the preservability of the contents can be further improved.

As the oxygen absorbent, any conventionally known oxygen absorbent can be used, but those having a reducing property and being substantially insoluble in water are preferably used. Examples thereof include reducing metal powders such as reducing iron, reducing zinc and reducing tin powder; lower metal oxides such as ferrous oxide and triiron tetroxide; iron carbide, silicon iron and iron carbonyl. ,
A single compound or a combination of reducing metal compounds such as iron hydroxide, etc., and further, a high molecular compound having a polyhydric phenol in the skeleton, for example, a polyhydric phenol-containing phenol.
Aldehyde resin, ascorbic acid, erythorbic acid,
Examples thereof include hydroxycarboxylic acids or salts thereof, and alkali metal salts of sulfurous acid.

As the resin to be mixed with the oxygen absorbent, any thermoplastic resin which can be injection-molded or molded can be used, but those having cushioning property and elasticity are preferably used. Examples are polyethylene,
Isotactic polypropylene, propylene-ethylene copolymer, polybutene-1, ethylene-butene-1 copolymer, propylene-butene-1 copolymer, ethylene-
Olefin resins such as vinyl acetate copolymers and ion-crosslinked olefin copolymers (ionomers); rubber-like olefin elastomers such as ethylene-propylene-diene copolymer rubber and hydrogenated ethylene-propylene-diene copolymer rubber; SBS One or more kinds of various soft plastics such as elastomer, butyl rubber, SBR, soft vinyl chloride resin and the like can be mentioned.

In the first embodiment of the present invention, a detaching member 6 is fixed to the packing 5 by integral molding or bonding, and the detaching member 6 removes the packing 5 from the cap body 4 at the time of sorting and collecting. It is to make it easier. The shape of the removal member 6 is not limited, but in the illustrated example, a knob 13 protruding from an arbitrary portion of the circular member 12 to the inner surface side of the cap body is formed. 2 shows an example in which the knob 13 extends from the center of the circular member 12, and FIG. 3 shows an example in which the knob 13 extends from the periphery of the circular member 12. As shown in FIG. That is, in this case, the packing is located around the removing member 6. The material of the detaching member 6 is not particularly limited as long as it is a material that can be fixed to the packing 5, and the same material as the packing 5 is usually selected.

The cap of the present invention may be made of a synthetic resin or metal, and may be a pill fur proof cap, a twist-off cap, a screw cap,
Any type of cap such as a screw type such as Finlock (registered trademark) and NC-flap (registered trademark), a stopper type, and a tamper evidence type can be applied.

When the cap is made of a metal, examples of the material constituting the cap shell include a light metal such as aluminum, and a surface-treated steel plate such as phosphoric acid treatment or chromic acid treatment.

When the cap is made of a synthetic resin, the cap shell can be made of any material conventionally used for cap shells, such as polyethylene or isotactic polypropylene. Olefin resins such as ethylene-propylene copolymer, polybutene-1, ethylene-polybutene-1 copolymer, propylene-butene-1 copolymer, ethylene-vinyl acetate copolymer, polystyrene, styrene-butadiene copolymer Coalescence, ABS resin or polycarbonate.

According to a second aspect of the present invention, a recess is formed inside the top plate of the cap body, and a weakening line for removing the packing from the cap body is formed in a part of the packing on the inner peripheral side of the recess. It is characterized by having done.

In the cap having the above structure, the packing is broken from the weakening line by the pressing force by pressing the weakening line formed in the packing in the cap from the inside after use, so that the packing can be easily removed from the cap. It was made. Also in this embodiment, the entire packing is formed by injection molding or embossing a resin containing an oxygen absorbent, or
An oxygen absorbing member formed by injection molding or embossing a resin containing an oxygen absorbent may be fixed to the packing by means of adhesion, fusion, or the like, inside the weakening line of the packing. The effects of these configurations are the same as in the first embodiment described above.

In the present invention, the layer of the molded product of the oxygen-absorbing agent-containing resin may have a structure having a large number of ribs and / or a large number of annular irregularities extending radially from the center. it can. According to this configuration, since the surface area of the oxygen-absorbing agent-containing resin layer in the container lid is significantly increased, the deoxygenating effect of the residual oxygen in the container after capping is increased.

Next, a method of using the cap 1 having the above structure will be described. First, the packing 5 to which the removing member 6 is fixed is fitted into the space between the concave portion 11 of the skirt portion 3 of the cap body 4 and the top plate 2 to form the cap 1. In this state, the packing 5 does not fall off the cap body 4. After the contents are filled in the container, a cap 1 is attached to the opening of the container and capped to obtain a final product.
At that time, since the packing and / or the removing member 6 contains the oxygen absorbent, the remaining oxygen in the head space of the container and the dissolved oxygen in the contents are absorbed,
Oxidation degradation of the contents and propagation of microorganisms can be effectively prevented.

Then, the cap 1 is opened from the mouth of the container, and after the contents are consumed, the container and the cap 1 are discarded. When the container and the cap 1 are both made of resin, the container and the cap 1 are mostly separated and collected. When the cap body 4 and the packing 5 of the cap 1 are formed of different polymers, the separation and collection are performed. Be eligible. When both the container and the cap 1 are made of metal,
Since the packing 5 is mostly made of resin, the cap body 4 and the packing 5 are separated and collected. When the packing is separated from the cap body, the removing member 6 fixed to the packing 5 of the present invention allows the packing 5 to be easily removed from the cap body 4, thereby facilitating processing corresponding to sorted collection. .

FIGS. 4 to 6 show a cap 1a according to another embodiment. The cap 1a is provided with a weakening line 14 in a part of the packing 5 located around the detaching member 6, and the weakening 14 is provided. The line 14 facilitates the breaking of the packing 5 and facilitates the removal of the packing 5 from the cap body 4. Since other configurations and operations are the same as those of the embodiment of FIGS. 1 to 3, the reference numerals are attached to the drawings, and the description is omitted.

FIGS. 7 to 9 show a cap 1b according to a second embodiment of the present invention.
It is indispensable to form the recess 15 inside the top plate 2 of the cap body 4 and to form a weakening line in a part of the packing. Also in this embodiment, the packing 5 is preferably formed by injection molding or embossing of an oxygen-absorbing compound-containing resin, and the oxygen-absorbing compound-forming resin is injection-molded or embossed inside the weakening line of the packing. The deoxidizing member 16 formed by the above method can be fixed by means such as adhesion or fusion. When the packing 5 is removed, if the inside of the weakening line formed on the packing 5 is pressed, the packing 5 is broken from the weakening line 17 by the pressing force, so that the packing 5 can be easily removed from the cap body 4. become.

FIGS. 10 to 12 show a cap 1c according to another embodiment of the second aspect of the present invention. The cap 1c has a curved shape on a part of the packing 5 located around the deoxidizing member 16. FIG. Since the remaining structure and operation are the same as those of the embodiment shown in FIGS. 7 to 9, the reference numerals are given to the drawings and the description thereof is omitted.

FIG. 13 shows a packing structure of a cap according to still another embodiment. This example is characterized in that the layer 19 of the molded article of the oxygen-absorbing compound-containing resin has a large number of ribs and / or a large number of annular irregularities extending radially from the center. With such a configuration, the surface area of the oxygen-absorbing agent-containing resin layer in the container lid is significantly increased, and the residual oxygen in the container after capping can be more effectively absorbed, and the storage stability of the contents is improved. It will be excellent.

Although the embodiment of the present invention has been described above, the specific configuration is not limited to this. Modifications / additions without departing from the scope of the present invention, and aspects relating to combinations of the claims are not limited to the above. It can be implemented arbitrarily.

[0047]

As described in detail above, according to the present invention,
By attaching a removal member to part of the packing,
When separating and collecting after use, it is easy to remove the packing portion from the cap simply by pulling the detaching member, so that the fruits of the separating and collecting can be improved. In addition, according to another aspect of the present invention, when the concave portion is formed inside the top plate of the cap, the inside of the weakening line formed in the packing 5 corresponding to the concave portion is pressed, so that the packing is formed from the weakened line portion. Are easily broken, and the packing can be easily removed from the cap body.

[Brief description of the drawings]

FIG. 1 is a side view, partially broken away, of a cap according to an embodiment of the present invention.

FIG. 2 is a plan view of a packing constituting the cap of FIG. 1;

FIG. 3 is a plan view of another packing constituting the cap of FIG. 1;

FIG. 4 is a partially cutaway side view showing a cap according to another embodiment of the present invention.

FIG. 5 is a plan view of a packing constituting the cap of FIG. 4;

FIG. 6 is a plan view of another packing constituting the cap of FIG. 4;

FIG. 7 is a partially cutaway side view of a cap according to another embodiment of the present invention.

FIG. 8 is a plan view of a packing constituting the cap of FIG. 7;

FIG. 9 is a plan view of another packing constituting the cap of FIG. 7;

FIG. 10 is a partially cutaway side view of a cap according to another embodiment of the present invention.

FIG. 11 is a plan view of a packing constituting the cap of FIG. 10;

FIG. 12 is a plan view of another packing constituting the cap of FIG. 10;

FIG. 13 is a plan view of a packing showing the structure of the ninth invention.

[Explanation of symbols]

 1, 1a, 1b, 1c Cap 2 Top plate 3 Skirt portion 4 Cap body 5 Packing 6 Removal member 10 Knurl 11, 15 Concave portion 12 Circular material 13 Pick portion 14, 17, 18 Weak line 16, 19 Deoxidizing member

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 3E084 AA12 AA23 AB01 BA01 CA01 CB01 CC02 DA01 DB13 DC03 FA09 FC04 GA08 GB12 HA01 HB04 HC03 HD01 KB01 LA17 LB02 LB07 LD01

Claims (9)

[Claims] 1. A cap for sealing a container mouth portion, the cap having at least a cap body having a skirt portion connected to a peripheral edge of a top plate and a packing mounted in the cap body. A cap provided with a detaching member for detaching from a cap body. 2. The cap according to claim 1, wherein the packing is formed by injection molding or embossing a resin containing an oxygen absorbent and inserted into the cap body. 3. The cap according to claim 1, wherein the removing member provided on the packing is a knob protruding toward the inner surface of the cap body. 4. The cap according to claim 1, wherein said detachable member is formed by injection molding or stamping of an oxygen absorbent-containing resin, and is fixed to said packing. 5. The cap according to claim 1, wherein a weakening line for removing the packing from the cap body is formed in a part of the packing located around the removing member. 6. A cap that has at least a cap main body having a skirt portion connected to a peripheral edge of the top plate and a packing mounted in the cap main body, and seals a container mouth portion, wherein the top plate of the cap main body is provided. A cap having a concave portion formed inside and a weakening line for removing the packing from a cap body in a part of the packing on the radially inner peripheral side of the concave portion. 7. The cap according to claim 5, wherein the packing is formed by injection molding or embossing a resin containing an oxygen absorbent, and is inserted into the cap body. 8. An oxygen absorbent-containing resin is injection-molded or embossed inside a weakening line provided on a part of the packing on the inner peripheral side of the concave portion for removing the packing from the cap body. The cap according to claim 5, wherein the formed oxygen absorbing member is fixed to the packing. 9. The cap according to claim 8, wherein the layer of the molded product of the oxygen-absorbing compound-containing resin has a large number of ribs and / or a large number of annular irregularities extending radially from the center.