JP2003335351A - Container cap structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cap structure of a container whose seal band left on the mouth part of a container main body is not dropped in using, and is easily removed in separating the main body and the cap as to the cap structure of a container which is opened by separating the seal band attached to the cap main body. <P>SOLUTION: This cap of a container comprises a cap main body (10) screwed on the mouth part (2) of a container main body (3), and an annular seal band (12) attached to the bottom end of the cap main body through a fragile part (11). The seal band (12) is protrusively provided with a plurality of protrusive parts (14) able to catch the protrusive strip part (24) of the neck part (2). The protrusive parts (14) catch and separate the band (12) for opening when the cap main body (10) is being removed. The protrusive strip (24) of the part (2) is formed with a slit in a width for the part (14) of the band (12) to go through. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid structure for a container, and more particularly to a lid structure for a container in which a lid band is attached to the lid body and the lid band is opened by separating the lid band from the lid body. It is a thing.

[0002]

2. Description of the Related Art Hitherto, a lid structure has been employed in many containers in which a sealing band for ensuring an unopened state is attached to the lower end of a lid body and the sealing band is opened by separating the lid band from the lid body. For example, Japanese Utility Model Publication No. 7-38165 discloses a “container with a sealing mechanism” in which a cap (lid) that guarantees an unopened state (sealed state) before use is screwed to the mouth and neck of the container body. ing.

In the above-mentioned container, a fixing ring (annular sealing band) is connected to a lower portion of a cap (lid body) via a breakable connecting portion (fragile portion), and the fixing ring is provided below the mouth and neck. There is a locking protrusion that hooks on the reverse rotation prevention protrusion.When the cap is rotated when opening, the locking ring rotates by the so-called ratchet mechanism between the locking protrusion on the fixing ring and the reverse rotation prevention protrusion on the mouth and neck. Is regulated, the connecting portion is broken, and only the cap body is rotated to come off. In addition, a slip-out prevention step (recess) is formed on the lower end edge of the reversing prevention protrusion of the mouth and neck, and an inward protrusion is provided on the lower end of the fixing ring, and the cap body is removed from the mouth and neck. In this case, the fixing ring remains at the base of the mouth / neck portion (below the reverse rotation preventing projection) due to the engagement between the inward protrusion of the fixing ring and the slip-out preventing step portion of the mouth / neck portion.

[0004]

By the way, in recent years, when a container is discarded, it is desired to separate the container body and the lid from the viewpoint of recycling and the like. However, in the above-described lid structure adopted in the conventional container, there is a problem that the sealing band, which is a part of the lid remaining on the container body side after opening, is difficult to remove and is difficult to separate.

Of course, the sealing band as described above can be designed to have a small fitting force with respect to the container body so that it can be easily detached. However, when the sealing band is easily detached from the container body, , The seal band may fall off during use.
As a result, for example, there is a risk that the sealing strip may be mixed in with the contents taken out from the container.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a lid structure for a container which is opened by separating a sealing band attached to the lid body. It is an object of the present invention to provide a container lid structure improved so that the sealing band remaining on the part does not fall off during use and can be easily removed when the container body and the lid are separated.

[0007]

In order to solve the above-mentioned problems, a lid structure of a container according to the present invention has a lid body screwed to a mouth and neck of a container body and a fragile portion at a lower end of the lid body. And a ring-shaped sealing band attached via, and in the sealing band, a plurality of protrusions hooked on a ridge along the circumferential direction of the base of the mouth and neck are directed toward the inner peripheral side. When the lid body is removed and the lid body is detached, the protrusion strips are caught by the protrusions to restrict the movement of the seal strip in the lid body detaching direction and separate the seal strip. In the lid structure of the container adapted to be opened, a slit having a width that allows the projection of the sealing band to pass through is provided in the convex strip of the mouth / neck portion in an arrangement pattern different from that of the projection. It is characterized by being formed.

In the above lid structure, when the lid main body is detached, the protrusion of the sealing strip is caught by the ridge on the base of the mouth and neck, and the movement of the sealing strip in the detaching direction of the lid main body is restricted. Therefore, the fragile portion connecting the lid main body and the sealing strip is broken, only the lid main body is removed, and the sealing strip remains at the base of the mouth and neck. Further, when the container body is tilted and used, the protruding portion of the remaining sealing strip is hooked on the protruding portion of the mouth and neck portion. At that time, since the slits of the ridges of the mouth and neck are formed in an arrangement pattern different from that of the protrusions, the sealing band does not fall off from the mouth and neck. Then, when removing the sealing strip from the mouth and neck, by rotating the sealing strip while lifting it toward the upper end of the mouth and neck, the protrusion of the sealing strip can be passed through the slit of the ridge of the mouth and neck. , The sealing strip can be moved to the upper side of the ridge and removed.

[0009]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a vertical cross-sectional view taken along the center line showing components of a lid structure for a container according to the present invention. 2 to 5
2 is a partial perspective view showing components and functions of a lid structure of a container according to the present invention, FIG. 2 is a view showing a state before a lid is attached to a mouth and neck of the container, and FIG. FIG. 4 is a diagram showing a state in which a lid is attached to the mouth / neck portion of the container, FIG. 4 is a diagram showing a state in which the container is opened, and FIG. In the following description of the embodiments, the lid structure of the container is abbreviated as “lid structure”.

The lid structure of the present invention is a lid structure that guarantees the unopened state (sealed state) of the container before use.
As shown in FIG. 2 and FIG. 2, it is composed of a structural portion of the mouth / neck portion (2) of the container body (3) and a structural portion of the lid (1), and is attached to the lower end of the lid body (10) of the lid (1). Sealed band (1
2) is opened by separating the lid body 10 from the lid body 10 (see FIG. 4).

In the present invention, as the container body (3), various types including glass can be applied as long as the mouth and neck portion (2) having a structure to which the lid (1) can be screwed is provided. However, generally, a container body made of a synthetic resin manufactured by various blow molding methods such as an extrusion blow molding method and a stretch blow molding method can be used.

As a constituent material of the container body (3), an olefin resin represented by polyethylene or polypropylene polymer is usually used. As polyethylene, high-density polyethylene (HDPE), low-density polyethylene (LDPE), blends of these (HDPE /
LDPE). In addition, polyethylene naphthalate (PEN), polyethylene terephthalate (PE
T) or blends thereof. Examples of the polypropylene-based polymer include polypropylene, a random (or block) copolymer of polypropylene and another α-olefin such as ethylene, syndiotactic polypropylene, and a blend thereof.

As shown in FIGS. 1 and 2, the container body (3)
The mouth / neck part (2) of the present invention engages at least the screw (23) provided on the outer peripheral part for screwing the lid (1) and the sealing band (12) of the lid (1) described later. And a ridge (24) formed along the circumferential direction on the base of the mouth and neck. The screw (23) is normally a forward screw that is tightened by clockwise rotation and loosened by counterclockwise rotation. Further, the ridge portion (24) is a single annular portion, and the screw (2
It is formed integrally with the mouth / neck portion (2) at an outer diameter larger than the outer diameter of the mountain in 3).

On the other hand, in the case of a container made of synthetic resin, the lid (1) is made of a material harder than the constituent material of the container body (3). Specifically, the constituent material of the lid (1) is a polypropylene resin, particularly polypropylene, a random (or block) copolymer of polypropylene and another α-olefin such as ethylene, syndiotactic polypropylene, or the like. Blends of Such a lid (1) is integrally manufactured by injection molding.

The lid (1) is attached to the mouth body (3) of the container body (3) by means of a lid body (10) screwed to the mouth and neck portion (2) and a fragile portion (11) at the lower end of the lid body. And a ring-shaped sealing band (12) that is formed. As shown in FIG. 1, the lid body (1
Reference numeral 0) is a member that substantially opens and closes the mouth of the container body (3) and has a screw (13) screwed into the screw (23) on the inner peripheral portion. The sealing band (12) is a sealing member for restricting the rotation of the lid body (10) and guaranteeing an unopened state until the first opening after manufacturing. The lid body (10) and the sealing band (12) are integrally formed via the weakened portion (11).

The fragile portion (11) is applied with a predetermined force to the lid body (1).
It is necessary to surely break when operating 0).
As shown in FIG. 2, for example, as a bridge connecting the lid body (10) and the sealing strip (12), the bridge body is formed in a pin shape thinner than the sealing body and the sealing strip, and a plurality of them are arranged along the circumferential direction. It That is, in the lid structure of the present invention,
The fragile portion (11) is broken by a predetermined operation force, and the lid body (10) and the sealing band (12) are separated (see FIG. 4).

Further, in order to regulate the accompanying movement of the seal band (12) (movement of the mouth / neck portion (2) toward the upper end) when the lid body (10) is loosened, as shown in FIGS. 1 and 2. In addition, the above-mentioned sealing strip (12) has a ridge (2) at the base of the mouth and neck (2).
A plurality of protrusions (14) hooked on 4) are projected toward the inner peripheral side. The sealing strip (12) illustrated in the figure is formed in a crown shape having an uneven upper end side, the fragile portion (11) is provided on the upper edge of the convex portion, and the protruding portion (14) is formed from the concave portion. It is provided so as to project obliquely upward on the inner peripheral side. Normal,
The number of protrusions (14) is about 3 to 6, and the minimum inner diameter when the tip of each protrusion (14) is tied is the mouth and neck (2).
It is set to be smaller than the outer diameter of the ridge (24).

As described above, in the lid structure of the present invention,
Since the lid body (10) and the sealing band (12) are connected at the fragile portion (11) and the sealing band (12) is provided with the protrusion (14), the removal operation of the lid body (10) by rotation can be performed. When it is carried out, the protruding strip (24) is caught by the protruding strip (24), and the sealing strip (1
The movement of 2) is regulated so that the fragile portion (11) is broken and the sealing band (12) is separated and opened.

In the present invention, when the container is disposed of after use, the mouth-neck portion (12) remaining on the mouth-neck portion (2) of the container body (3) can be easily removed ( As shown in FIGS. 2, 4 and 5, the ridge (24) of 2) is provided with a slit (24s) having a width that allows the protrusion (14) of the sealing band (12) to pass therethrough. It is important that the arrangement pattern is different from that of 14).

The slit (24s) of the ridge (24) is
When the container body (3) from which the lid body (10) has been removed is laid down, the sealing strip (12) does not fall off, and when viewed in plan, all the protrusions (14) of the sealing strip (12). Are formed at positions that do not match at the same time. Slit (24s)
Although the number of ridges is arbitrary, it is usually smaller than the protrusions (14) of the sealing strip (12) in the convex stripes (24) of the mouth and neck (2) because they satisfy the above arrangement pattern. The number of slits (24s) is formed. As shown in the figure, one slit (24s) is sufficient.

In the ridge (24), the slit (24s) has a lid main body (10) from the outer circumference to the inner circumference of the ridge (24) when the mouth and neck (2) is viewed in plan.
It is preferably formed in a state of being inclined in the tightening direction (direction opposite to the loosening direction). That is, the slit (24
s) is formed so as to gradually move away from the diametrical direction of the mouth-neck portion (2) as it goes from the outer circumference to the inner circumference of the ridge (24). As a result, the lid body (1
0) even if it is rotated in the loosening direction, the lid body (10)
The seal belt (12) does not come off when accompanied by.

In the container to which the lid structure of the present invention is applied, after the container body (3) is filled with contents, the lid body (1
0) and the seal band (12) are integrally molded, the lid (1)
On the mouth and neck (2). The lid (1) can be attached simply by applying it to the mouth and neck (2) of the container body (3) and tightening it (see FIG. 2). That is, when the lid main body (10) is tightened, the protrusions (14) of the sealing band (12) come into contact with the ridges (24) of the neck and neck (2) and are further elastically deformed to form ridges. It rides over (24) and is located below the ridge (24). As a result, the container has a protrusion (1) of the sealing strip (12).
4) is caught on the lower edge of the ridge (24), and the lid body (1
(0) is in a sealed state in which rotation in the loosening direction is restricted (see FIGS. 1 and 3).

When the container is used for the first time, the lid body (10) is rotated with a somewhat strong force in the loosening direction. In the lid structure of the present invention, the mouth / neck portion (2) is removed by removing the lid body (10) (rotating operation with a somewhat strong force in the loosening direction).
To the ridge (24) of the base of the sealing strip (12) (1
4) is caught and the movement of the sealing strip (12) in the detaching direction of the lid body (10) is restricted, so that the fragile portion (11) connecting the lid body (10) and the sealing strip (12) is broken, As a result, only the lid body (10) comes off, and the sealing band (12) remains at the base of the mouth and neck (2) (see FIG. 4).

When the container body (3) is used while being tilted or tumbled, the remaining sealing strip (12) has a protrusion (14) on the ridge (24) of the mouth and neck (2). Get caught in. At that time, since the slits (24s) of the ridges (24) of the mouth and neck (2) are formed in an arrangement pattern different from that of the protrusions (14), the sealing band (12) is located in the mouth and neck (2). ) Does not fall from its own weight.

On the other hand, when the used container is discarded, the lid (1) including the sealing band (12) and the container body (3) are included.
Can be easily separated. That is, when removing the sealing strip (12) remaining in the mouth and neck (2), for example, tightening the lid body (10) while lifting the sealing strip (12) to the upper end side of the mouth and neck (2). Sealing band in the same direction (12)
By rotating the seal band (12), the protrusion (1
4) the slit (24) of the ridge (24) of the mouth and neck (2)
s) can be passed. Even when the ridge (24) is provided with only one slit (24s),
By rotating the sealing strip (12), the protrusions (14) are sequentially passed through the slits (24s), and the sealing strip (12) can be moved to the upper side of the ridge (24) for removal (Fig. 5).

As described above, in the lid structure of the present invention,
The protruding portion (14) of the sealing band (12) is passed through the convex strip (24) of the mouth / neck part (2) that restricts the movement of the sealing band (12) in the detaching direction of the lid body (10). Since the slits (24s) of the obtained width are formed in the arrangement pattern different from that of the protrusions (14), the sealing strip (12) remaining on the mouth and neck (2) at the time of opening does not fall off during use, And
When removing the sealing strip (12) from the mouth and neck (2) to separate the container body (3) and the lid (1), the sealing strip (12) is used without using a tool such as a cutter. It can be removed very easily just by lifting it and rotating it.

In the lid structure of the present invention, a ratchet mechanism is provided below the ridge (24) of the mouth and neck (2) to rotate the sealing strip (12) in one direction (the lid main body ( 1
0) rotation in the same direction as the loosening rotation).

[0028]

As described above, according to the lid structure of the container of the present invention, the sealing strip is provided to the convex ridge portion of the mouth / neck portion for restricting the movement of the sealing strip in the detaching direction of the lid main body. Since the slits with a width that allows the protrusions to pass through are formed in an arrangement pattern different from that of the protrusions, the sealing strip remaining on the mouth and neck during opening does not fall off during use, and the seal is made from the mouth and neck. When removing the band, the band can be removed very easily simply by lifting and rotating the sealing band.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a structural element of a lid structure for a container according to the present invention, broken along a center line.

FIG. 2 is a perspective view showing the lid structure of the container before the lid is attached to the mouth and neck of the container.

FIG. 3 is a perspective view showing the lid structure of the container with the lid attached to the mouth and neck of the container.

FIG. 4 is a perspective view showing a lid structure of the container when the container is opened.

FIG. 5 is a perspective view showing a method of removing the sealing strip at the time of sorting in the lid structure of the container.

[Explanation of symbols]

1: Lid 10: Lid body 11: Vulnerable part 12: Sealed belt 13: Screw 14: Projection 2: Mouth and neck 23: Screw 24: ridge 24s: slit 3: Container body

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Claims (3)

[Claims] 1. A lid body (10) screwed to a mouth neck portion (2) of a container body (3), and a fragile portion (1) at a lower end of the lid body.
1) and a ring-shaped sealing strip (12) attached via the sealing strip (12), and the sealing strip (12) has a ridge (24) along the circumferential direction of the base of the mouth-neck (2). A plurality of protrusions (14) that are caught on the inner surface of the lid body (1)
When the removal operation of (0) is performed, the movement of the sealing strip (12) in the detaching direction of the lid main body (10) is restricted by the projection portion (14) being caught by the protruding strip portion (24), and the sealing strip (12) is removed. A lid structure for a container designed to separate and open
A slit having a width that allows the projection (14) of the sealing band (12) to pass through is formed in the convex strip (24) of the mouth and neck (2) in an arrangement pattern different from that of the projection (14). A lid structure for a container, which is characterized in that 2. The protrusion (24) of the mouth-neck portion (2) is formed with slits (24s) in a number smaller than that of the protrusions (14) of the sealing band (12). The lid structure of the described container. 3. The slit (24s) is inclined in the tightening direction of the lid body (10) from the outer circumference to the inner circumference of the ridge (24) when the mouth / neck (2) is viewed in a plan view. The lid structure for a container according to claim 1 or 2, wherein the lid structure is formed.