JP2002114245A - Classifying disposable plastic cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a classifying disposable plastic cap the expansion or stretching of whose peripheral band in its peripheral direction is controlled with a control mechanism covered and protected by the outside face of the band which is easily removed from a bottle neck part after use by finger while the band is completely separated in its thickness direction. SOLUTION: This disposable plastic cap comprises a cap main body comprising a top panel part and a skirt part whose inside peripheral wall is provided with a thread fitting the thread of a container mouth part, a peripheral band which is connected to the bottom end of the skirt part through a breakable bridge and has a fitting part able to fit a bottle neck on its inner face side, and a mechanism provided on the band for removing from the bottle neck. The mechanism for removing comprises vertical splits extending in its entire thickness and peripheral directions reaching from the outer peripheral face to the inner peripheral face of the band, and fitting parts on the outer peripheral side and the inner peripheral side fittable to each other in the peripheral direction being sectioned at least in a part of the splits.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic cap which can be separated and discarded, and more particularly to a plastic cap which facilitates removal of a peripheral band for a clear opening function from a mouth of a bottle after use. .

[0002]

2. Description of the Related Art The above-mentioned plastic cap having an opening function has a structure in which a circumferential band portion is formed at a lower portion of a cap body via a breakable bridge.
A typical example of this is that the peripheral band portion is fixed by engaging the inner surface portion of the peripheral band portion with the outer peripheral portion of the container neck, and the bridge is broken with opening of the cap body. The cap body and the peripheral band portion are separated.

If the detached circumferential band remains on the neck of the bottle, it becomes an obstacle to recycling the plastic of the bottle, so that it can be easily removed from the neck of the bottle after use. Need to be done, and some suggestions have been made.

Japanese Utility Model Laid-Open Publication No. Sho 61-56249 discloses a cap body, a pill fur proof ring provided below the cap body, and a small pill fur proof ring detachably connected to the lower portion of the cap body. In a synthetic resin cap in which a flaky bridge and a synthetic resin are integrally molded, the pill fur proof ring goes from one of its upper and lower parts to the other, and
In addition, there is described a synthetic resin cap in which a cutout having at least one or more return portions is formed in the middle thereof.

Japanese Patent Application Laid-Open No. 6-156516 discloses a container lid having a tamper-evidence band in which a vertical split is formed, wherein the cut surface of the split in the tamper-evidence band thickness direction is the outer surface of the tamper-evidence band. The container lid is characterized in that the container lid is formed so as to pass through a position shifted in the circumferential direction from the cutting start point of the outer peripheral surface until reaching the inner peripheral surface.

[0006]

According to the first proposal, when the pill fur proof ring (peripheral band) is stretched on the pill fur proof ring when it is attached to the mouth of the bottle, the notch returns. The advantage is obtained that there is no risk of being cut at the notch because the extension is prevented at the portion. However, this method has a problem that it is not sanitary because the entire cutout portion is exposed to the outside. In addition, there is still a point to be improved in terms of productivity and manufacturing cost, such as the necessity of a split mold when forming the cap.

On the other hand, in the second proposal, even if the splits overlap in the circumferential direction of the cut surface and the split spreads a certain range in the circumferential direction,
Although the mouth and neck of the container are not exposed through the split, the disadvantage of the tamper-evident band (circumferential band) expanding in the circumferential direction is unavoidable, and this expansion may damage the bridge. The fear of receiving it is inevitable.

[0008] Therefore, an object of the present invention is to suppress the spread and elongation in the circumferential direction while the circumferential band is completely cut off in the thickness direction, and that the restraining means is covered by the outer surface of the circumferential band. It is an object of the present invention to provide a separately disposable plastic cap which is protected and can be easily removed with a finger from the neck of the bottle after use. Another object of the present invention is to provide a separable and disposable plastic cap which can be molded using an ordinary mold, has high productivity, and is excellent in appearance characteristics, sanitary characteristics, and reliability of tightening. It is in.

[0009]

According to the present invention, there is provided a cap body comprising a top plate and a skirt and provided on the inner peripheral wall of the skirt with a screw for engaging with a screw of a container mouth, and a lower end of the skirt. A plastic band comprising a circumferential band connected via a breakable bridge to the inside and having a locking portion to the bottle neck on the inner surface side, and a removing mechanism from the bottle neck provided on the circumferential band, An upper and lower split that extends in the thickness direction and the circumferential direction as a whole from the outer peripheral surface to the inner peripheral surface of the circumferential band, and is separated by at least a part of the split and can be engaged with each other in the circumferential direction The present invention provides a separable and disposable plastic cap comprising an outer peripheral side and an inner peripheral side engaging portion. In the cap of the present invention, The outer circumferential side engaging portion and the inner circumferential side engaging portion are defined by a split having a Z-shape, an inverted Z-shape, an S-shape or an inverted S-shape when viewed from the lower surface side of the circumferential band; 2. 2. The inner peripheral end of the outer peripheral engaging portion and the outer peripheral end of the inner peripheral engaging portion have an angle of 90 degrees or less in a horizontal cross section; 3. the split is provided so as to reach the upper and lower surfaces of the circumferential band; An outer circumferential split provided so that the split reaches the middle of the thickness from the outer circumferential side of the circumferential band, and a circumferential interval from the outer circumferential split such that the split reaches the middle of the thickness from the inner circumferential side of the circumferential band. Inner split, a step split provided in the thickness direction substantially in the middle between the outer split and the inner split, leaving a thickness on the outer side and the inner side, and an inner end of the step split. A first circumferential split that connects the inner circumferential end of the outer split and a second circumferential split that connects the outer circumferential end of the step split and the outer circumferential end of the inner split, 5. 5. an outer peripheral side engaging portion is formed by the first peripheral split and the step split; and an inner peripheral side engaging portion is formed by the second peripheral split and the step split. A bridge is located at an inner peripheral end of the split, and at least one side of the split inner peripheral end,
6. Preferably, the peripheral band portions on both sides are connected to the skirt portion via the bridge; It is preferable that the lower end of the skirt portion of the cap body and the upper end of the circumferential band are separated by an annular surface and are connected by a bridge located inside the annular surface.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The plastic cap of the present invention
A cap body comprising a top plate portion and a skirt portion and having a screw on the inner peripheral wall of the skirt portion for engaging with a screw of a container mouth portion; a bottle connected to the lower end of the skirt portion via a breakable bridge; A peripheral band having a locking portion to the neck, and a mechanism for removing the bottle from the neck provided on the peripheral band, the mechanism for removing the peripheral band from the outer peripheral surface to the inner peripheral surface of the peripheral band. A split that extends in the thickness direction and the circumferential direction as a whole, and an outer circumferential side and an inner circumferential side engaging portion that are defined by at least a part of the split and can engage with each other in the circumferential direction. .

In the present invention, since the split extending in the thickness direction and the circumferential direction as a whole is provided so as to extend from the outer peripheral surface to the inner peripheral surface of the peripheral band, the bridge is broken upon opening and the peripheral band is bottled. In the state of being cut off at the neck of the peripheral band, the peripheral band is completely cut by the split, so that the peripheral band is divided by the peripheral band split without any special force to tear or cut the peripheral band. By lifting one end, it can be easily peeled off from the bottle neck.

In the present invention, it is also a remarkable feature that at least a part of the split defines an outer peripheral side and an inner peripheral side engaging portion which can be engaged with each other in a circumferential direction. Although it has already been pointed out that the above-mentioned split completely cuts the circumferential band, the outer circumferential side engaging portion and the inner circumferential side engaging portion are provided so as to engage with each other in the circumferential direction by this split. Therefore, in the state where the peripheral band is integrated with the cap body via the bridge, even if stress is generated in the peripheral band at the time of tightening around the bottle, the outer peripheral side engaging portion and the inner peripheral The side engaging portions are engaged with each other, and the elongation of the peripheral band is suppressed, and the damage of the peripheral band and the damage of the bridge are effectively prevented.

Further, in the present invention, since the outer circumferential side engaging portion and the inner circumferential side engaging portion are provided so as to partition at least a part of the split extending in the thickness direction and the circumferential direction as a whole, the outer circumferential side engaging portion is provided. The part and the inner peripheral side engaging part are covered and protected by the outer peripheral surface and the inner peripheral surface of the peripheral band, there is no adhesion of dust, etc., and it is sanitary. There is an advantage that it is not damaged by contact with Further, since the engaging portion is provided in the circumferential band and cannot be seen from the outside, the appearance characteristics of the cap are excellent.

Further, in the cap of the present invention, since the split to the circumferential band is provided on the upper and lower sides, the molded cap can be easily die-cut in the vertical direction and does not require an expensive split mold. In addition, it has the advantages of excellent moldability and high productivity.

In the cap according to the present invention, the outer peripheral side engaging portion and the inner peripheral side engaging portion have a Z-shaped, inverted Z-shaped, S-shaped or inverted S-shaped as viewed from the lower surface side of the circumferential band. It is preferable to be divided by the split of In such a structure in which the outer circumferential side engaging portion and the inner circumferential side engaging portion face each other, when a circumferential tension is generated in the circumferential band, the convex portion of the outer circumferential side engaging portion and the inner circumferential side engaging portion are formed. The concave portion, the concave portion of the outer peripheral side engaging portion, and the convex portion of the inner peripheral side engaging portion are locked without causing unnecessary movement in the radial direction, and it is very important to prevent the circumferential band from coming off the split. It is effective for

In the cap of the present invention, the inner peripheral tip of the outer peripheral engaging portion and the outer peripheral tip of the inner peripheral engaging portion have an angle of 90 ° or less in a horizontal section, more preferably. It is preferable to have an angle of less than 90 degrees, and most preferably an angle of 40 to 80 degrees, in order to ensure that both engagement portions are engaged in the circumferential direction.

It has already been pointed out that the upper and lower splits in the circumferential band are provided as complete or nearly complete cutting lines from the outer circumferential side to the inner circumferential side of the circumferential band. Is preferably provided so as to reach the top and bottom of the bottle for the purpose of facilitating removal of the peripheral band remaining on the bottle neck.

The split according to the present invention can have any structure as long as the above-mentioned conditions are satisfied. In one embodiment, the outer split provided so as to reach the middle of the thickness from the outer circumference of the circumferential band is used. An inner split provided at an interval in the circumferential direction from the outer split so as to reach the middle of the thickness from the inner circumference of the circumferential band, an outer split in the middle between the outer split and the inner split, and A step split provided substantially in the thickness direction while leaving a thickness on the inner circumferential side, a first circumferential split that connects an inner circumferential end of the step split and an inner circumferential end of the outer split, and an outer circumference of the step split A second circumferential split connects the side end and the outer circumferential end of the inner circumferential split. In this case, it is preferable that the outer circumferential side engaging portion is formed by the first circumferential split and the stepped split, and the inner circumferential side engaging portion is formed by the second circumferential split and the stepped split. . The structure of the split will be described later in detail.

In the cap of the present invention, a bridge is located at the inner peripheral end of the split, and at least one side of the inner peripheral end of the split, preferably both sides of the peripheral band, is formed as described above. The fact that the cap is connected to the skirt via the bridge ensures that the cap is properly aligned with the cap when the cap is plugged, and that the cap is not damaged by the bottle neck. Preferred for insertion. Of course, the bridge located at the inner peripheral side end of the split, like other bridges, is cut or weakened with the turning of the cap body upon opening, and does not hinder the separation of the circumferential band. .

Further, in the present invention, the lower end of the skirt portion of the cap body and the upper end of the peripheral band are separated by an annular surface, particularly a cut surface, and are connected by a bridge positioned inside the annular surface. preferable. In this structure, the position and the horizontal cross-sectional area of the bridge are such that the peripheral band is held as set without breaking the bridge when closing, while opening is easily performed by breaking the bridge when opening. Can be regulated. This is particularly significant in the above-described configuration in which a bridge is provided at the inner peripheral end of the split.

It should be understood that many modifications can be made in the present invention without departing from the spirit of the invention. For example, the cap body, the circumferential band and the bridge may be of any structure known per se and are not subject to any particular restrictions.

The cap body comprises a top plate portion and a skirt portion hanging down from the periphery of the top plate portion. On the inner surface of the skirt, a screw portion for winding around the bottle neck is formed, and the outer surface of the skirt is formed. Is formed with a knurl groove for facilitating gripping of the cap. On the top plate,
A mechanism for sealing with the bottle mouth and a mechanism for sealing or engaging with the inner plug fitted to the bottle mouth may be provided on the inner surface side. The sealing mechanism may be of a one-piece structure provided integrally with the top plate, or may be a liner provided separately from the top plate by means such as in-shell molding. The mechanism for sealing or engaging provided on the inner surface of the top plate portion may be a flat seal in contact with the top surface of the bottle mouth or the inner cap mouth, or an outer ring in contact with the outer peripheral surface of the bottle mouth or the inner cock mouth. A seal may be used, a seal using an inner ring in contact with the inner peripheral surface of the bottle opening or the inner stopper opening may be used, or a combination of two or more of these may be used.

As the circumferential band, one provided with an arbitrary locking portion on the inner surface side of the circumferential band capable of engaging the circumferential band with the bottle neck is used. For example, the locking portion may be a flap piece or fin that engages with the jaw of the bottle neck, or an inner ratchet that engages with the outer ratchet of the bottle neck.

A flap piece for engaging and fixing the peripheral band to the container mouth portion extends obliquely upward from a lower portion on the inner peripheral side of the peripheral band, and extends in a direction in which the diameter of the tip increases. The deformation is provided so as to be possible. When the flap piece is closed, it can climb over the chin below the outer periphery of the container mouth and engage with the lower part thereof, whereby the circumferential band can be fixed to the container mouth. . On the other hand, when the cap is opened, the circumferential band is positioned below the chin of the container neck by the flap piece, and the opening direction is the rising direction, and the flap piece is engaged under the chin. Since the cap is fixed so as not to be lifted and only the cap body is raised, the bridge is broken by the shearing force. Due to this break, the cap body and the peripheral band are separated and the cap is opened.

The fins are a large number of fins arranged in a circumferential direction from the inner peripheral side of the peripheral band in a radially inward and obliquely opening direction. The fins are adapted to engage with the jaws below the outer periphery of the container neck when the container is closed. When closing the cap to the container, when the cap is rotated in the closing direction, the screw on the container neck engages with the screw on the inner surface of the skirt, and the capping proceeds. In this case, since the extending direction of the fins of the peripheral band coincides with the plugging direction, the fins pass over the chin of the container neck and reach the lower part thereof, and the peripheral band is securely held by the fins. . On the other hand, when the cap is opened, the circumferential band is positioned below the jaw of the container neck by the fins, and the opening direction is the direction in which the fins are extended, so that the cap is unrotatably fixed, Since only the cap body rotates in the opening direction, the bridge is broken by the shearing force. Due to this break, the cap body and the peripheral band are separated and the cap is opened. In addition, in the case of the type of locking portion such as flap pieces and fins, the skirt portion and the peripheral band are connected to remove the peripheral band integrally with the cap body when the cap is opened, in addition to the breakable bridge. The portion may be provided near the split.

As the ratchet, a number of ratchets are used which are attached to the inner surface of the circumferential band at regular intervals via a root and whose leading ends extend inward in the radial direction and in the opening direction. On the other hand, the container neck to which this cap is fastened has a ratchet below and on the outer periphery of the jaw. The ratchet of the circumferential band can rotate over the jaw and the ratchet on the outer periphery of the container neck when closed, so that the circumferential band can be fastened to the container mouth with an appropriate fastening torque. . Further, upon opening, the tip of the ratchet of the cap and the ratchet of the container neck engage and are fixed so as not to rotate, and only the cap body rotates in the opening direction, so that the bridge is broken by shearing force. . Due to this break, the cap body and the peripheral band are separated and the cap is opened.

The plastic cap of the present invention usually comprises
It is manufactured in a state where the cap body and the peripheral band are integrated by injection molding, compression molding, or the like. Examples of the resin used for molding include various plastics, for example, low-, medium- or high-density polyethylene, linear low-density polyethylene, polypropylene, thermoplastic polyester, polyamide, styrene resin, ABS resin, and the like. Among these, high-density polyethylene and propylene-based polymers are preferred. A liner can be provided separately from the cap body. In this case, low-density polyethylene, ethylene-based copolymer, various rubbers or thermoplastic elastomers, acrylic resin plastisols, vinyl chloride resin plastisols, or the like can be used.

In the present invention, plastics used for the production of caps include fillers, colorants, heat stabilizers, weather stabilizers, antioxidants, antioxidants, light stabilizers, ultraviolet absorbers, antistatic agents, Lubricants such as metal soaps and waxes,
A known resin compounding agent such as a modifying resin or rubber can be compounded according to a known formulation.

[0029]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail below with reference to an embodiment shown in the accompanying drawings. 1 is a side view of an example of the cap of the present invention, FIG. 2 is a bottom view of the cap of FIG. 1, FIG. 3 is a side sectional view of the cap of FIG. 1, and FIG. 3 is a cross-sectional view taken along line LL of FIG. 3, FIG. 5 is an enlarged view of a split forming portion of the circumferential band of the cap of FIG. 4, and FIG. 6 shows a cross-sectional position in the thickness direction of the split forming portion of FIG. FIG. 7 is an explanatory view, and FIG.
8 is a vertical sectional view taken along line AA of FIG. 6, FIG. 8 is a vertical sectional view taken along line BB of FIG. 6, and FIG.
FIG. 10 is a vertical sectional view taken along line C-D in FIG.
11 is a vertical sectional view taken along line EE in FIG. 6, and FIG. 12 is an enlarged view showing a state in which the cap of FIG. 1 is fastened to the container neck together with the inner stopper held therein. It is sectional drawing.

In FIGS. 1, 2 and 3 showing an example of the plastic cap of the present invention, this cap comprises a top plate portion 1 and a skirt portion 2 and is engaged with a screw of a container mouth on an inner peripheral wall of the skirt portion. Body 3 having a screw 21 to be cut and a breakable bridge 4 at the lower end of the skirt 2
Locking portion 5 connected to the bottle neck on the inner surface side
, And a mechanism 7 (FIGS. 3 and 4) for removing the bottle from the neck of the bottle provided on the circumferential band 6. As shown in FIG. 12, the cap of this embodiment is closed at the neck of the bottle 10 together with the inside stopper 9 for pouring out the contents held inside, and the cap body 3 has the shape of the bottle neck (fitting). (Including the combined inner plug).

The inner surface of the top plate 1 has a mechanism for engaging with the inner plug, an outer ring 11 and an inner ring 12 protruding inward in the axial direction, and a concave portion 13 located between the two rings.
Are formed. The functions of these engagement mechanisms will be described later with reference to FIG.

A screw 21 is formed on the inner surface of the skirt 2 to engage with the screw at the container opening. On the other hand, a knurl groove 22 is formed on the outer surface of the skirt portion 2 to facilitate gripping of the cap. The lower portion of the skirt portion 2 is a tapered portion 23 whose diameter gradually increases downward, and is smoothly connected to the outer peripheral surface of the circumferential band 6 via the tapered portion 23. In addition, skirt part 2
Above the screw portion 21 on the inner surface of the, a small holding projection 24 for detachably holding the inner plug is formed. The function of the inner plug holding projection 24 will be described later with reference to FIG.

Under the skirt portion 2 of the cap, a circumferential band 6 for indicating opening is provided via an annular cutting surface or an annular separating surface 31.
Is provided. The lower end of the skirt portion 2 of the cap and the circumferential band 6 are divided by an annular cut surface or separation surface 31 and distributed circumferentially so as to be located inside the inner periphery of the cut surface or separation surface 31. Are connected by a bridge 4 arranged in a vertical direction.

In the case of the cap of this embodiment, the engagement and fixing of the circumferential band 6 to the container neck is performed by the flap pieces 5. The flap pieces 5 of the circumferential band 6 are provided in the lower part on the inner circumferential side of the circumferential band so as to be vertically bent and integrally formed in a circumferential shape. The flap piece 5 is inserted into the container neck in a state of being bent upward and inward, and climbs over the jaw of the container neck and engages with the lower portion of the jaw to hold the circumferential band on the container neck. It is possible.

7 to 11, the flap piece 5 is shown in a state formed by injection molding, compression molding or the like. In this state, the flap pieces 5 extend downward and inward from the inner surface of the circumferential band 6. Thereafter, the flap piece is deformed by a tool (not shown) so as to extend upward and inward, and is wound around the container neck.

The flap piece 5 has a thicker inner end portion 51 and is connected to a lower portion of the inner surface of the circumferential band 6 through a thin base portion 52, and gradually becomes radially outward. It has a thin cross section. This flap piece 5
The circumferential band 6 is preferably divided in the circumferential direction by a cutout 53 extending radially from the center toward the inner surface of the circumferential band 6. The notch 53 allows the flap piece 5 to be bent up and down and also allows drainage.

The inner peripheral surface 61 of the peripheral band 6 has an inner diameter larger than the inner diameter of the inner surface 25 of the skirt portion of the cap body. For this reason, when the flap piece 5 is inserted into the container neck in a state of being folded upward, the flap piece 5 is stored in the space having the increased inner diameter, so that an unreasonable load is not applied when the cap is closed.

In the cap of the present invention, as shown in the enlarged view of FIG. 5, a mechanism 7 for removing the bottle from the neck portion is provided in the circumferential band 6. Outer peripheral surface 62 of circumferential band 6
Upper and lower splits 71 extending in the thickness direction and the circumferential direction as a whole so as to reach the inner peripheral surface 61, and outer peripheral side engaging portions partitioned by at least a part of the splits 71 and capable of engaging with each other in the circumferential direction. 72 and an inner peripheral side engaging portion 73.

The split 71 has an outer peripheral end 74 located on the outer peripheral surface of the peripheral band and an inner peripheral end 75 located on the inner peripheral surface of the peripheral band. are doing. In this specific example, the outer peripheral side engaging portion 72 and the inner peripheral side engaging portion 73 are formed by being divided by a split having an inverted Z-shape when viewed from the lower surface side of the peripheral band 6. The inner peripheral end of the side engaging portion 72 and the outer peripheral end of the inner engaging portion 73 have an angle of 90 degrees or less in a horizontal cross section. Of course, the split that partitions the outer peripheral side engaging portion 72 and the inner peripheral side engaging portion 73 is not limited to the above example, and may be any shape such as a Z-shaped, inverted Z-shaped, S-shaped, or inverted S-shaped. It should be understood that this can take the form of

7 to 11 showing a detailed cross section in the thickness direction of the split 71, an outer peripheral side slit 81 is provided so as to reach the middle of the thickness from the outer peripheral side of the circumferential band 6 (FIG. 11). The slit 81 is formed in the skirt 2
It can be understood that it also penetrates up and down through the tapered portion of. In addition, an inner circumferential slit 82 is provided at an interval in the circumferential direction from the outer circumferential slit 81 so as to reach the middle of the thickness from the inner circumferential side of the circumferential band 6 (FIG. 7).
Further, a step slit 83 is provided in the thickness direction substantially in the middle of the outer peripheral side slit 81 and the inner peripheral side slit 82, leaving a thickness on the outer peripheral side and the inner peripheral side (FIG. 9). A first circumferential slit 84 is formed so as to connect the inner peripheral end of the step slit 83 and the inner peripheral end of the outer peripheral slit 81 (FIG. 10). Furthermore, step slit 8
A second circumferential slit 85 is formed to connect the outer peripheral end of the inner peripheral slit 82 to the outer peripheral end of the inner peripheral slit 82 (FIG. 8). It will be appreciated that each of these slits is connected as described above to form an inverted Z-shaped split. In addition, the first circumferential slit 84 and the step slit 8
3 form the outer peripheral side engaging portion 72, and the second peripheral slit 85 and the stepped slit 83 form the inner peripheral side engaging portion 7.
It will also be appreciated that 3 is formed.

As shown in FIGS. 5 and 7, the bridge 4 is located at the inner peripheral end of the split 71, and the peripheral band portions on both sides of the split inner peripheral end connect the bridge 4. It is preferable to be connected to the skirt portion through the above-mentioned reason for the above-mentioned reason.

In the cap according to the present embodiment, as shown in FIG.

FIG. 12 shows an inner plug suitably used in combination with the cap of this embodiment.
Are a flange portion 92 having a groove 91 into which the container neck 10 is inserted, a horizontal wall 93 formed on the inner peripheral side below the flange portion 92, and a pouring provided on an upper inner peripheral portion of the flange portion 92. A tubular portion 94, an opening portion 95 of the horizontal wall, an opening score 96 for defining the opening portion 95, and an opening portion 95
And an opening tab 97 provided in the opening.

An inward projection 99 is formed on the inner surface of the outer peripheral portion 98 of the flange to engage with the upper jaw of the container neck. On the other hand, a seal portion 101 is formed on the outer surface of the inner peripheral portion 100 of the flange. The dispensing cylinder portion 94 has a trumpet shape whose diameter increases upward, so that the liquid to be poured can be drained. The opening tab 97 is composed of a pull ring 103 provided integrally with a planned opening portion 95 via a foot portion 102.
By grasping 03 with your finger and pulling it up,
The score 96 is sheared so that the opening portion 95 can be removed.

At the lower portion of the inner peripheral portion 100 of the flange portion 92, there is formed a container neck guide 104 formed of a downwardly extending cylindrical portion. The inner stopper 9 is attached to the container neck at a time in a state of being housed in the plastic cap, but even when the inner stopper 9 in the cap has a slight inclination, the operation of the guide 104 causes There is an advantage that the container neck 10 is securely guided into the groove 91 of the flange portion, so that the inner stopper 9 and the container neck 10 can be securely engaged with each other. The guide 104 preferably has an outer diameter smaller than the inner diameter of the container neck, and has a tapered portion whose diameter gradually decreases downward.

A plurality of flaky projections 105 are formed below the outer peripheral portion 98 of the inner plug flange portion 92, and the flaky projections 105 can be engaged with the upper portion of the screw of the plastic cap. The inner plug holding projection 24 is formed. Thereby, the inner plug 9 is securely held by the plastic cap without detaching during the transfer of the cap or during the closing operation, and since the projection 105 of the inner plug is flaky, the annular projection 24 of the cap is opened when the cap is opened. And the inner plug 9 can be left on the container neck while maintaining the sealed state with the container neck.

In FIG. 12, which shows the container in a state in which the inner stopper 9 and the cap of FIG.
0 is a jaw 111 for holding the inner plug on the outer periphery of the container neck,
A screw 112 for fastening the cap, a jaw 113 for holding the circumferential band, and a support ring 114 are provided.

In order to fasten the inner plug 9 and the cap of FIG. 1 to the container neck, a plastic cap with an inner plug in which the inner plug is housed and held is put on the container neck, and the cap screw 21 and the container neck are attached. The cap 112 is turned by engaging the screw 112. Along with this rotation, the inner stopper guide 104 is first inserted inside the container neck 10, and the position of the inner stopper is correctly regulated with respect to the container neck. When the turning angle of the cap reaches a certain angle, for example, when the screw 21 of the cap and the screw 112 of the container neck reach 180 degrees or more from the start of screwing, the top 115 of the container neck and the inner plug projection 99 engage. . As the swiveling operation for closing the cap continues, the inner plug 9 is pushed down by the outer ring 11 of the cap, and the inner plug projection 99 moves to the inner stopper locking jaw 11 of the container neck.
Beyond 1, a sealing engagement between the inner plug and the container neck takes place. At the same time, the tip of the discharge cylinder portion 94 of the inner plug 9 is inserted into the concave portion 13 between the outer ring 11 and the inner ring 12, and engages with the inner ring 12. In this state, the flap piece 71 of the cap circumferential band rides over the jaw 113 for holding the circumferential band of the container neck and engages with the lower portion thereof, thereby fixing the circumferential band 6 to the container neck. Done.

When opening the cap, knurl the cap 2
2 is grasped with a finger, and the cap body is swung in the opening direction. However, since the peripheral band 6 is fixed to the container neck by the flap piece 5, the bridge 4 is cut, and the inner plug 9 is connected to the container neck. The container neck portion 1 of the cap body 3 in a sealing engagement state
0 can be removed. The opening of the inner stopper 9 is performed by the operation already described. After a predetermined amount of contents are taken out, the cap body is put on the container neck again, the cap body 3 is turned in the closing direction, and resealing by the cap is performed. Can be.

When disposing of used containers, the container neck 1
The peripheral band 6 remaining at 0 can be easily removed with a fingertip by the detaching mechanism 7 (split 71) of the present invention. That is, the outer peripheral end 74 of the split 71
The lower part 76 of the portion of the peripheral band 6 provided with
By putting a finger on 1) and pulling the finger outward, the engagement between the outer circumferential side engaging portion 72 and the inner circumferential side engaging portion 73 is released, and the circumferential band 6 is separated by the split 71.
Removal from the container neck 10 is very easy.
Since the bridge 4 provided at the inner peripheral end 75 of the split 71 is broken or weakened when the plug is opened, it does not hinder the removal of the circumferential band. Although the split has been described as a complete cutting line as described above, the split may be covered with a breakable thin film.

[0051]

According to the present invention, a cap body comprising a top plate portion and a skirt portion and having a screw on the inner peripheral wall of the skirt portion for engaging with a screw of a container mouth portion, and a breakable portion at the lower end of the skirt portion. A peripheral band connected via a bridge and having a locking portion to the bottle neck on the inner surface side, and a plastic cap comprising a mechanism for removing the bottle from the neck provided on the peripheral band;
Upper and lower splits extending in the thickness direction and the circumferential direction as a whole from the outer peripheral surface to the inner peripheral surface of the circumferential band, and an outer peripheral side defined by at least a part of the split and capable of engaging with each other in the circumferential direction. With the inner peripheral side engaging portion, while the peripheral band is completely cut off in the thickness direction, the expansion and elongation in the peripheral direction are suppressed, and the suppressing means is used for the peripheral band. It has the advantage that it is covered and protected by the outer surface, and that the peripheral band can be easily removed from the neck of the bottle after use with a finger. Further, the cap of the present invention has the additional advantages that it can be molded using an ordinary mold, has high productivity, and is excellent in appearance characteristics, sanitary characteristics, and certainty of tightening.

[Brief description of the drawings]

FIG. 1 is a side view of an example of a cap of the present invention.

FIG. 2 is a bottom view of the cap of FIG.

FIG. 3 is a side sectional view of the cap of FIG. 1;

FIG. 4 is a sectional view taken along line LL in FIG. 3;

FIG. 5 is an enlarged view of a split forming portion of a circumferential band of the cap of FIG. 4;

FIG. 6 is an explanatory diagram showing a cross-sectional position in the thickness direction of a split forming portion in FIG. 5;

FIG. 7 is a vertical sectional view taken along line AA of FIG. 6;

FIG. 8 is a vertical sectional view taken along line BB of FIG. 6;

FIG. 9 is a vertical sectional view taken along line CC in FIG. 6;

FIG. 10 is a vertical sectional view taken along line DD in FIG. 6;

FIG. 11 is a vertical sectional view taken along line EE in FIG. 6;

FIG. 12 is an enlarged sectional view showing a state in which the cap of FIG. 1 is fastened to the container neck together with the inner plug held therein.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hiroshi Shibayama 2-12 Nagatoro, Hiratsuka-shi, Kanagawa Prefecture Inside the Hiratsuka Plant of Japan Crown Cork Co., Ltd. (72) Inventor Osamu Ishii 2-12 Nagatoro, Hiratsuka-shi, Kanagawa Japan Nippon Crown Cork Inside the Hiratsuka Plant Co., Ltd. (72) Inventor Yoichi Tsujiguchi 2-12 Nagatoro, Hiratsuka-shi, Kanagawa Japan F-Term in the Hiratsuka Plant, Japan 3C084 AA12 BA03 CA01 CC03 DA01 DB05 DB12 DC03 EA03 EB01 EB02 EB04 EC03 FA09 GA01 GB01 GB08 GB12 GB14 GB17 HB01 HD04 KA12 KA15 LA03 LA07 LA17

Claims (8)

[Claims] 1. A cap body comprising a top plate portion and a skirt portion and having a screw engaged with a screw of a container mouth on an inner peripheral wall of the skirt portion, and connected to a lower end of the skirt portion via a breakable bridge. And a plastic cap comprising: a peripheral band having an engagement portion with the bottle neck on the inner surface side; and a mechanism for removing the bottle from the neck provided on the peripheral band, wherein the removing mechanism comprises an outer peripheral surface of the peripheral band. Upper and lower splits extending in the thickness direction and the circumferential direction as a whole so as to reach from the inner peripheral surface to the inner peripheral surface, and the outer peripheral side and the inner peripheral side engagement defined by at least a part of the splits and capable of engaging with each other in the circumferential direction. A plastic cap that can be disposed of separately. 2. An outer circumferential side engaging portion and an inner circumferential side engaging portion are defined by a split having a Z-shape, an inverted Z-shape, an S-shape or an inverted S-shape when viewed from the lower surface side of the circumferential band. The cap according to claim 1, wherein the cap is formed. 3. The method according to claim 1, wherein an inner peripheral end of the outer peripheral engaging portion and an outer peripheral end of the inner peripheral engaging portion have an angle of 90 degrees or less in a horizontal cross section. The cap described. 4. The cap according to claim 1, wherein the split is provided so as to reach an upper surface and a lower surface of the circumferential band. 5. An outer circumferential split provided so that the split extends from the outer circumferential side of the circumferential band to the middle of the thickness, and a split extends from the inner circumferential side of the circumferential band to the middle of the thickness so as to reach the middle of the thickness. Inner split provided at intervals in the direction, a step split provided in the thickness direction substantially in the middle between the outer split and the inner split, leaving a thickness on the outer and inner circumferential sides, of a step split A first circumferential split connecting the inner circumferential end and the inner circumferential end of the outer split, and a second circumferential shape connecting the outer circumferential end of the step split and the outer circumferential end of the inner split. The cap according to any one of claims 1 to 4, wherein the cap is made of a split. 6. An outer peripheral side engaging portion is formed by the first circumferential split and the stepped split, and an inner peripheral side engaging portion is formed by the second circumferential split and the stepped split. The cap according to claim 5, characterized in that: 7. A bridge is located at an inner peripheral end of the split, and a portion of a peripheral band on at least one side of the split inner peripheral end is connected to the skirt via the bridge. The cap according to any one of claims 1 to 6, wherein 8. The cap body according to claim 1, wherein the lower end of the skirt portion of the cap body and the upper end of the circumferential band are separated by an annular surface and are connected by a bridge located inside the annular surface. 8. The cap according to any one of 7.