JP5755030B2 - cap - Google Patents

Description

  The present invention relates to a cap attached to a mouth portion of a container filled with liquid contents or the like, and more particularly to a cap in which a spout is formed by breaking and removing a sealing plate provided with a thinned weakened portion on the periphery. Is.

  The sealing plate that is attached to the mouth of the container filled with the content liquid and then sealed through the thinned weakened part on the partition that seals the inside of the container is separated and removed from the partition by pulling up the pull ring when unplugged. A cap that forms a spout for pouring liquid is well known in the art (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2001-261051

However, in the conventional cap stopper such as the plastic cap described in Patent Document 1, when the pull ring is pulled upward, the pull plate-side sealing plate is first pulled upward to pull the pull ring side. Shearing force acts on the thinned portion and breakage begins.
As the thinned weakened portion progresses, the separated sealing plate gradually bends upward, and immediately before the sealing plate is completely separated, it slightly bends upward to the vicinity of the thinned weakened portion. Since the pulling force acts perpendicularly to the breaking line in plan view, the force acting on the thinned portion becomes stronger than the shearing force.

As a result, whisker-like flaking caused by a pulling force occurs around the opposite side of the column of the pull ring on the fracture surface of the spout from which the sealing plate has been cut off.
Especially for caps with a circular periphery of the sealing plate, the length of the peripheral edge where the pulling force immediately before the sealing plate is completely separated is longer than that of the long and narrow cap in the direction of separation, so there is a lot of fluffing. It was.
For this reason, there is a problem in that a sense of incongruity occurs when the lip is applied to the spout to drink the content liquid.
There is also a problem that it is not preferable in appearance.

  An object of the present invention is to solve the above-mentioned problem, and a smooth spout is formed without a fracturing surface around a spout formed after breaking the thinned portion at the periphery and removing the sealing plate. It is an object to provide a cap to be used.

In order to solve the above-mentioned problems, the present invention is a cap that is attached to a container mouth portion as a cap, and a partition wall that seals the inside of the container is connected to a lower portion of a pouring cylinder that guides contents, and the partition wall A sealing plate that forms a spout through a thinned weakened portion is provided at an inner portion of the pouring tube, and the sealing plate is provided above via a support provided in the vicinity of one peripheral edge. And a thickened portion over a predetermined circumferential angle range on the other peripheral side opposite to the support column, and the width of the thinned weakened portion is small at a portion adjacent to the thickened portion, and is opposite to the thickened portion The structure characterized by gradually increasing toward the column side of the pull ring is adopted.

As a specific embodiment of the cap of the present invention, the thick portion is provided to protrude from the upper surface of the sealing plate, and the periphery of the sealing plate is circular. Adopt a featured configuration.

  The cap of the present invention is provided with a thick portion over a predetermined circumferential angle range on the peripheral side opposite to the pull ring support on the sealing plate, so that the thinned weakened portion breaks when unplugging and the sealing plate is separated. Even if it is just before the sealing plate is reinforced by the thick part, it is difficult to bend, and the force acting on the thinned part by pulling the pull ring upward is shearing force until the end, the tensile force It is possible to prevent whisker-like flaking caused by stretching.

Moreover, if the thick part which protrudes on the peripheral upper surface of the sealing board adjacent to a thin weakened part is provided, a sealing board will become more difficult to bend | fold and can prevent a fluff standing.
By providing the thick portion, it was possible to prevent flaking even in a cap in which the peripheral edge of the sealing plate having a large flaking was circular.
Further, if the width of the thinned portion is reduced at the portion adjacent to the thick portion and gradually increased toward the pull ring side opposite to the thick portion, the opposite side of the pull ring, that is, the sealing plate on the verge of being completely separated. Since the width of the thinned weakened portion connected to each other is small, the elongation deformation of the thinned weakened portion is small, the bending deformation is small, the pulling force is suppressed, and the flaking can be prevented.

It is a cross-sectional side view which shows the cover closed state of the cap of this invention. It is a figure which shows the cover open state of the cap of this invention, (a) is a top view, (b) is a cross-sectional side view [XX sectional drawing of a figure (a)]. It is a principal part enlarged view of the cap shown in FIG.2 (b), (a) is the principal part a in FIG.2 (b), (b) is an enlarged view of the principal part b in FIG.2 (b). It is a cross-sectional side view which shows the state which the upper cover inclined to the container side in the process of closing the cap of this invention.

  Next, the cap of the present invention will be described with reference to the drawings showing examples.

1-4, A is a cap main body to be plugged into the container main body, B is an upper lid formed integrally with the cap main body A via a hinge C, and D is a container main body.
Engagement ridges 2 are provided on the outer periphery of the mouth portion 1 of the container body D.

  As shown in FIGS. 1 and 2, the cap main body A includes a partition wall 3 that seals the inside of the container, a pouring cylinder 4 that stands on the periphery of the partition wall 3, and an upper part that is connected to the outer periphery of the pouring cylinder 4. A wall 5, an engagement cylinder portion 6 that is suspended from the upper wall 5, and an outer peripheral cylinder portion 7 that is connected to the outer periphery of the engagement cylinder portion 6 at a constant interval and that has a hinge C connected to the outer periphery of the upper end. It is made up of.

The partition wall 3 is provided with a circular sealing plate 9 through the thinned portion 8 at the inner part of the dispensing tube 4, and the sealing plate 9 is separated and removed from the partition wall 3 when unplugged. Open.
On the upper surface of the sealing plate 9, a pull ring 10 that is pulled up at the time of unplugging is provided in the vicinity of the peripheral edge on the hinge C side via a support column 11. 12 is provided.
As shown in FIG. 2A, the thick portion 12 is formed over a predetermined circumferential angle α with the position opposite to the column 11 of the pull ring 10 as the center.

As shown in FIGS. 2 (a), 3 (a), and 3 (b), the thinned weakened portion 8 has a small width adjacent to the thickened portion 12 on the side opposite to the hinge C. The width of the provided hinge C side is increased.
In this embodiment, the width of the thinned weakened portion 8 is the smallest e on the opposite side of the hinge C, gradually increases toward the hinge C side, and the maximum width of 2e at the portion closest to the column 11 on the hinge C side. The inner circumferential circle of the thinned weakened portion 8 is formed eccentrically by e with respect to the outer circumferential circle.

The upper wall 5 is connected to the middle outer periphery of the dispensing cylinder 4, and the lower part of the upper wall 5 is the opening of the container body D together with the inner periphery of the engaging cylinder part 6 and the lower outer periphery of the dispensing cylinder 4. A fitting groove for fitting the portion 1 is formed, the mouth portion 1 is fitted into the fitting groove, and the engaging protrusion 2 is engaged with the engaging tube portion 6.
A lid engaging portion 13 that engages with the upper lid B is erected on the upper portion of the upper wall 5, and a bulging portion 14 having an enlarged diameter is formed on the upper end of the outer periphery of the lid engaging portion 13. A reduced diameter portion 15 having a smaller diameter than the bulging portion 14 is continuously formed.
Moreover, the lower end outer periphery of the engagement cylinder part 6 and the lower end inner periphery of the outer periphery cylinder part 7 are the connection piece 16 provided in the other side of the hinge C, and the breakable weakening piece 17 arrange | positioned in multiple intervals. And connected through.

As shown in FIGS. 1 and 2, the upper lid B includes a top wall 20 and a side wall 21 that is suspended from the periphery of the top wall 20. An inner cylinder 22 to be inserted into the inner periphery is suspended.
The side wall 21 is provided with an engagement recess 23 that engages with the lid engagement portion 13 of the engagement cylinder portion 6 of the cap body A at the lower end of the inner periphery, and the hinge C is connected to a predetermined position on the lower end of the outer periphery. It is installed.
An air passage 24 that communicates the inside and outside of the cap is disposed at a predetermined location on the upper surface of the engaging recess 23 that abuts the upper end surface of the lid engaging portion 13 at the time of plugging.

  The inner cylinder 22 has a protruding ring 25 formed on the outer peripheral surface thereof so as to be in sliding contact with the inner peripheral surface of the dispensing cylinder 4 and sealed, and further below the protruding ring 5 over a substantially semicircular circumference on the hinge C side. And a receiving portion 26 that forms the lowest lower end portion on the hinge C side, that is, behind the column 11 of the pull ring 10 is provided.

  Hinge C is provided at both ends with hinge pieces 30 that connect a predetermined position of the outer peripheral upper end of the outer peripheral cylindrical portion 7 of the cap body A and a predetermined position of the outer peripheral lower end of the side wall 21 of the upper lid B. There are a holding claw 31 protruding in a bowl shape at the lower outer periphery of the side wall 21 of the upper lid B, and an outer peripheral upper portion of the outer peripheral cylindrical portion 7 of the cap body A. A holding protrusion 32 is provided.

Next, usage modes and operational effects of this embodiment will be described.
As shown in FIG. 1, in the cap of this embodiment, a fitting groove formed between the engaging cylinder portion 6 and the outer peripheral cylinder portion 7 is applied to the mouth portion 1 of the container body D in the closed state. Then, it is plugged from above the upper lid B, fitted into the engaging protrusion 2, and attached to the mouth 1 of the container body D.
To unplug the cap of the present embodiment, the upper lid B is opened and the pull ring 10 is pulled upward.
When the pull ring 10 is pulled up, the hinge C side of the sealing plate 9 provided with the column 11 integrated with the pull ring 10 is lifted upward, and the thin wall between the partition wall 3 connected to the lower portion of the dispensing tube 4 is pulled up. A shearing force acts on the weakened portion 8, and the thin weakened portion 8 begins to break.

When the thinned weakened portion 8 breaks and the portion where the sealing plate 9 is separated from the partition wall 3 exceeds a predetermined size (length), the separated sealing plate 9 gradually rises due to the pulling force of the pull ring 10. It will bend.
Further, when the sealing plate 9 is largely separated, the separated sealing plate 9 is bent greatly upward, but when the fractured portion reaches the thinned weakened portion 8 adjacent to the thick portion 12, the sealing plate 9 is Since it is reinforced by the thick portion 12, thereafter upward bending is suppressed.

And even if the fractured part approaches the opposite side of the hinge C that is finally cut off, the adjacent thin part 12 suppresses upward bending near the thinned part 8, and the pulling force by the pull ring 10 is reduced by the thin part. 8 continues to work as a shearing force.
Therefore, even on the opposite side of the pull ring 10 from which the sealing plate 9 is finally cut off, there is no whisker-like fluff standing due to the pulling force on the fracture surface, and a smooth spout periphery can be obtained. it can.

In this embodiment, the circumferential angle α in the range in which the thick portion 12 is provided is approximately 90 °, but the circumferential angle α is appropriately determined depending on the shape of the sealing plate 9 and the like, and is about 45 ° to 120 °. A range is preferred.
In this embodiment, the peripheral edge of the sealing plate is circular, but it goes without saying that the shape may be elongated in the pull ring column and the opposite direction of the column.

Moreover, since the cap of the present embodiment is provided with the holding claw 31 and the holding protrusion 32 on the hinge C, the upper lid B can be held at a predetermined opening degree when the lid is opened.
Furthermore, as shown in FIG. 4, since the receiving part 26 is provided in the inner cylinder 22 of the upper cover B, the lower part of the receiving part 26 is the extraction cylinder from the stage when the upper cover B becomes vertical in the process of closing the upper cover B. 4, the contents adhering to the inner surface of the upper lid B can be collected in the container via the receiving portion 26, so that the contents are not spilled around the cap and contaminated.

  The cap of the present invention is suitable for application to a pull-top type cap that is attached to the mouth of a container filled with liquid contents or the like. Any type of cap that removes the provided sealing plate to form a spout can be widely applied.

A Cap body B Upper lid C Hinge D Container body 1 Mouth part 2 Engagement ridge 3 Bulkhead 4 Extraction cylinder 5 Upper wall 6 Engagement cylinder part 7 Peripheral cylinder part 8 Thinning weakened part 9 Sealing plate 10 Pull ring 11 Strut 12 Meat Thick part 13 Lid engaging part 14 Swelling part 15 Reduced diameter part 16 Connection piece 17 Weakening piece 20 Top wall 21 Side wall 22 Inner cylinder 23 Engaging recess 24 Air passage 25 Projecting ring 26 Receiving part 30 Hinge piece 31 Holding claw 32 Holding Ridge

Claims (3)

A cap attached to the container mouth,
A partition wall that seals the inside of the container is connected to the lower part of the pouring cylinder that guides the contents,
A sealing plate that forms a spout through a thinned weakened portion is provided on the inner part of the partition pipe from the pipe.
The sealing plate is provided with a pull ring provided above via a support provided in the vicinity of one peripheral edge, and a thick part extending over a predetermined circumferential angle range on the other peripheral edge opposite to the support ,
A cap characterized in that the width of the thinned weakened portion is small at a portion adjacent to the thickened portion and gradually increases toward the column side of the pull ring opposite to the thickened portion .   2. The cap according to claim 1, wherein the thick portion is provided so as to protrude from the upper surface of the sealing plate. The cap according to claim 1 or 2, wherein a peripheral edge of the sealing plate is circular .

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