cap

Abstract

To provide a cap which can surely seal the mouth part of a container body, be easily opened by rotating the cap when opening, and cannot be re-capped at the mouth part of the container body once the cap is opened.SOLUTION: A cap C includes an outer circumferential cap C1 attached to the outer circumference of the mouth part 1 of a container body B, and a plug body C2 that is connected to the upper part of the outer circumferential cap C1 via a breakable thin weakened part 10 and seals the inner periphery of the mouth part 1; the outer circumferential cap C1 has a threaded part 14 that can be threaded into the mouth part 1, the plug body C2 has a knob part 23 protruding from the top surface; to open the cap C, the outer circumferential cap C1 rises while breaking the thin weakened part 10 by rotation, and the plug body C2 that is separated from the outer circumferential cap C1 can be pulled up from the mouth part 1 by the knob part 23.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a cap attached to the mouth of a container body, and particularly to a cap that cannot be re-capped once it is opened.

Background Art

[0002] Conventionally, drink-sized beverage containers and refill containers sealed with screw caps have been known (see, for example, Patent Document 1). When the contents stored in the original container are used up, this refill container is used by removing the inner stopper etc. from the original container, then opening the screw cap of the refill container, and attaching the inner stopper etc. removed from the original container to the refill container.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the screw cap of the refill container described in Patent Document 1 has a problem that after being opened, the refill container can be re-capped as it is, so that it can be used only with the refill container without attaching the inner stopper etc. of the original container.

[0005] An object of the present invention is to solve the above problems, to ensure reliable sealing of the mouth of the container body, to be easily opened by rotating the cap at the time of opening, and to provide a cap that cannot be re-capped on the mouth of the container body once the cap is opened.

Means for Solving the Problems

[0006] To solve the above problems, the present invention provides a cap comprising an outer cap attached to the outer circumference of the mouth of the container body, and a stopper body connected to the upper part of the outer cap via a breakable thin-walled weakened portion, which seals the inner circumference of the mouth, wherein the outer cap is A mounting cylinder portion whose inner circumference is attached to the outer circumference of the mouth of the container body, an outer flange portion extending inward from the upper end of the inner circumference of the mounting cylinder portion, the lower surface of which abuts against the upper end surface of the mouth, and provided on the inner circumference of the mounting cylinder portion, A threaded part that can be screwed into the opening. and The plug has, A stopper cylinder whose outer circumference is press-fitted into the inner circumference of the opening, an inner flange portion extending outward from the upper end of the stopper cylinder with its lower surface abutting the upper end surface of the opening, a bottom wall that closes the lower inner end of the stopper cylinder, and the bottom wall From the top It is erected in a way that allows it to be bent. Thumb part and The device features a configuration in which, when the cap is opened, the outer cap rises while breaking the thin, weakened section by rotation, and the stopper body separated from the outer cap can be pulled up from the opening using the handle.

[0008] As a specific embodiment of the cap, the mounting cylinder portion is characterized by having a plurality of vertical ribs on its inner circumference as screw-fitting portions, the outer flange portion has a groove into which the tip of the knob of the stopper is inserted, the inner flange portion is continuous with the groove of the outer flange portion and has a recessed notch into which the bent knob fits, and the thinned and weakened portion is formed intermittently with a gap in between. [Effects of the Invention]

[0009] The cap of the present invention, having the above configuration, ensures a secure seal over the mouth of the container body, and can be easily opened by rotating the cap. Once the cap is opened, it separates into an outer cap and a stopper, and cannot be re-capped over the mouth of the container body. [Brief explanation of the drawing]

[0010] [Figure 1] This figure shows the state of the refillable container of this embodiment after the container body and cap have been assembled, with (a) being a top view and (b) being a side cross-sectional view. [Figure 2] This figure shows the cap of the refillable container in this embodiment, with (a) being a top view and (b) being a side cross-sectional view. [Figure 3]This is a bottom view of the cap of the refillable container in this embodiment. [Figure 4] This figure shows the open state of the cap on the container body of the refillable container in this embodiment, with (a) being a side cross-sectional view when the outer cap is open and (b) being a side cross-sectional view when the stopper is opened. [Modes for carrying out the invention]

[0011] Next, the cap of the present invention will be described with reference to the drawings, based on an embodiment that has been materialized as a cap for a refillable container. [Examples]

[0012] In Figure 1, A is a replaceable container consisting of a container body B that holds the contents and a cap C that is attached to the container body B and seals the inside of the container body B. Container body B is made of a relatively hard material, while cap C is made of a softer material than container body B.

[0013] As shown in Figure 1, the container body B consists of a cylindrical mouth portion 1 that opens at the top and a bottomed cylindrical body portion 2 formed below the mouth portion 1. The mouth portion 1 is provided with a stopper mounting portion 3 at the top for attaching the cap C of the replacement container A or the inner stopper of the original container (not shown), and an overcap mounting portion 4 below it for attaching the overcap of the original container (not shown). On the outer circumference of the inner plug mounting portion 3, a male threaded portion 5 is screwed at the top, and an engaging projection 6 is provided around the lower part.

[0014] As shown in Figures 1 to 3, the cap C comprises an outer cap C1 that is attached to the outer circumference of the mouth 1 (internal stopper mounting portion 3) of the container body B, and a stopper body C2 that is connected to the upper inner circumference of the outer cap C1 via a breakable thin-walled weakened portion 10 and seals the inner circumference of the mouth 1. Multiple thin-walled weakened portions 10 are formed intermittently (four in this embodiment) with gaps 11 in between. The gap 11 is formed to facilitate the breaking of the thin-wall weakened portion 10. However, if the thin-wall weakened portion 10 can be easily broken, the gap 11 may not be provided, and the thin-wall weakened portion 10 may be provided over the entire circumference.

[0015] The outer peripheral cap C1 is composed of a mounting cylinder portion 12 whose inner periphery is mounted on the outer periphery of the middle plug mounting portion 3 of the mouth portion 1 of the container body B, and an outer peripheral flange portion 13 that extends inward from the upper end of the inner periphery of the mounting cylinder portion 12 and whose lower surface abuts against the outer edge of the upper end surface of the mouth portion 1. On the inner periphery of the mounting cylinder portion 12, a screwing portion 14 that screws with the male screw portion 5 on the outer periphery of the middle plug mounting portion 3 is provided at the upper portion, and a locking projection portion 15 that engages by overcoming the engaging projection portion 6 is provided around the lower end portion.

[0016] On the inner periphery of the outer peripheral flange portion 13, a plurality of thin-wall weakened portions 10 that are connected to the inner peripheral flange portion 21 described later are continuously provided at the lower end, and a groove portion 16 into which the tip portion 23a of the knob portion 23 of the plug body C2 described later is inserted is recessed at a predetermined position (the left side in FIG. 2) at the upper end portion.

[0017] As shown in FIG. 3, in this embodiment, the screwing portion 14 has a plurality of vertical ribs 14a arranged at equal intervals on the inner periphery of the mounting cylinder portion 12. When the cap C is mounted on the container body B by screwing, due to stress relaxation caused by the creep phenomenon inside each vertical rib 14a, the shape of the male screw portion 5 of the mouth portion 1 is transferred, and a screw groove is formed.

[0018] The plug body C2 is composed of a plug cylinder 20 whose outer periphery is press-fitted into the inner periphery of the mouth portion 1, an inner peripheral flange portion 21 that extends outward from the upper end of the plug cylinder 20 and whose lower surface abuts against the inner edge of the upper end surface of the mouth portion 1, a bottom wall 22 that closes the lower end of the inner periphery of the plug cylinder 20, and a knob portion 23 that stands upright with a predetermined width at a position offset from the center of the bottom wall 22 (toward the right in FIG. 2). Since the knob portion 23 is provided at a position eccentric from the center of the plug body C2 (toward the right), when the knob portion 23 is pulled up, the right side of the plug body C2 is lifted first, making it easier to remove the plug body C2. Further, the grip portion 23 is formed to be easy to grip by providing unevenness on the surface on the tip end portion 23a side or by forming a hole for hanging a finger, and can be bent with the vicinity of the connecting portion 23b with the bottom wall 22 as a fulcrum.

[0019] On the inner peripheral flange portion 21, a plurality of thin-wall weakened portions 10 connected to the outer peripheral flange portion 13 are continuously provided at the lower end of the outer periphery, and at the upper portion, it is continuous from the groove portion 16 of the outer peripheral flange portion 13 of the outer peripheral cap C1, and a notch portion 24 is recessed so that the bent grip portion 23 can enter.

[0020] Next, the usage mode and operational effects of the present embodiment will be described while referring to the drawings. As shown in FIGS. 2 and 3, the cap C of the present embodiment is integrally formed in a state where the outer peripheral cap C1 and the plug body C2 are connected via the thin-wall weakened portion 10.

[0021] When the cap C is molded, since the grip portion 23 is in an upright state, the grip portion 23 is bent to the left with the connecting portion 23b as a fulcrum from the state shown in FIG. 2, and as shown in FIG. 1, the grip portion 23 is inserted between the notch portions 24 of the inner peripheral flange portion 21 of the plug body C2, and the tip end portion 23a of the grip portion 23 is inserted into the groove portion 16 of the outer peripheral flange portion 13 of the outer peripheral cap C1 and fixed. The grip portion 23 of the cap C is fixed so as not to protrude from the upper surface of the plug body C2 in a bent state, so it does not interfere with the flow of the refill container A. Also, although not shown, after fixing the grip portion 23, by attaching a label, a seal, or the like so as to cover the upper surface of the cap C, the grip portion 23 can be hidden to make the cap C look good.

[0022] Next, after filling the container body B with the contents, the cap C is set on the container body B by caulking. First, the mounting cylinder portion 12 of the outer cap C1 of the cap C is set above the mouth portion 1 of the container body B. When force is applied from above so that the upper surface of the outer flange portion 13 of the outer cap C1 and the upper surface of the inner flange portion 21 of the stopper body C2 come into contact together, the male thread portion 5 of the inner stopper mounting portion 3 of the container body B comes into contact with the threaded portion 14 of the mounting cylinder portion 12, causing the outer cap C1 to descend while biting into the threads, and at the same time, the stopper cylinder 20 of the stopper body C2 is pressed into the inner circumference of the mouth portion 1 and descends.

[0023] Finally, as shown in Figure 1, the lower surface of the outer flange portion 13 of the outer cap C1 and the lower surface of the inner flange portion 21 of the stopper body C2 come into contact with the upper surface of the mouth 1, stopping the downward movement of the cap C. At the same time, the locking projection 15 of the mounting cylinder portion 12 overcomes and engages with the engaging projection 6 of the inner stopper mounting portion 3 of the container body B. Simultaneously, the stopper cylinder 20 of the stopper body C2 fits tightly into the inner circumference of the mouth 1, completing the stoppering process. The cap C is then attached to the container body B, and the replacement container A is completed. After the capping is complete, the threads of the male thread portion 5 bite into the inside of the vertical rib 14a of the screw portion 14, transferring its shape. In this embodiment, the cap C is fitted onto the container body B, but the cap C may also be screwed onto the container body B. In this case, the screw portion 14 of the mounting cylinder portion 12 should have a female screw portion that can be screwed into the male screw portion 5 of the inner stopper mounting portion 3.

[0024] During the plugging process, force is applied from above so that the outer cap C1 and the plug body C2 come into contact with each other simultaneously. As a result, the outer cap C1 and the plug body C2 come into contact with the upper surface of the opening 1 at the same time, completing the plugging process. Therefore, the outer cap C1 and the plug body C2 do not shift during the plugging process, preventing the thin-walled weakened portion 10 connecting them from breaking. Furthermore, although not shown in the diagram, by applying a shrink label that wraps from the top of the cap C down to the container body B, the product can be made into a refillable container A.

[0025] To replace the original container A with the original container body when the contents of the original product are depleted, first, the tip 23a of the knob 23, which is fixed to the groove 16 of the outer flange portion 13 of the outer cap C1, is rotated around the connecting portion 23b as a pivot point to lift it up. Then, the outer circumference of the outer cap C1 of the cap C of the replacement container A is grasped and rotated in the unscrew direction relative to the container body B. When the outer cap C1 is rotated, the outer cap C1 begins to rise due to the unscrew of the male threaded portion 5 of the inner stopper mounting portion 3 of the container body B and the threaded portion 14 of the mounting cylinder portion 12.

[0026] As the outer cap C1 begins to rise, the locking projection 15 of the mounting cylinder portion 12 overcomes the engaging projection 6 of the container body B. However, the stopper body C2, which is tightly fitted to the inner circumference of the mouth portion 1, does not move. As a result, the positions of the outer cap C1 and the stopper body C2 shift, causing the thin-walled weakened portion 10 connecting them to break, and the outer cap C1 rises while the stopper body C2 remains attached to the mouth portion 1 of the container body B. Finally, as shown in Figure 4(a), the outer cap C1 is removed while the stopper C2 remains attached to the container body B.

[0027] Once the outer cap C1 is removed, the tip 23a of the knob 23 on the stopper body C2 is grasped and pulled, which pulls the bottom wall 22 upward from the center, and then deforms it by pulling inward from the lower end of the stopper cylinder 20, which disengages it from the mouth 1 of the container body B, and as shown in Figure 4(b), the stopper body C2 is removed from the container body B and the cap C is opened from the mouth 1 of the container body B. In this embodiment, the knob 23 is located slightly to the right of the center of the stopper C2, making it easier to lift the stopper C2 from the right side where the knob 23 is located.

[0028] In this embodiment, after cap C is set into the mouth 1 of the container body B by pressing it into place, the outer cap C1 and the stopper body C2 separate into separate parts during the first opening. Even if only the outer cap C1 is screwed back into the mouth 1 of the container body B, the inside of the outer cap C1 remains open. Furthermore, even if one attempts to re-seal the stopper C2 onto the inner circumference of the opening 1, the bottom wall 22 and stopper cylinder 20 of the stopper C2 are pulled and deformed during opening, preventing it from fitting tightly onto the inner circumference of the opening 1. As a result, even if you try to recap the cap C after the initial opening, you cannot recap it onto the opening 1 of the container body B and use it.

[0029] By attaching the original inner stopper and overcap to the opening 1 of the opened container body B, the product can be reused as a replacement container body B. [Industrial applicability]

[0030] The cap of the present invention ensures a secure seal over the mouth of the container body, can be easily opened by rotating the cap, and once the cap is opened, it cannot be re-capped onto the mouth of the container body. Therefore, it is suitable for use as a cap for single-serving beverage containers and refillable containers for cosmetics and other products. [Explanation of Symbols]

[0031] A Replacement container B Container body C Cap C1 Outer cap C2 plug body 1 Mouth 2 Torso 3. Insertion part for the inner stopper 4. Overcap mounting area 5 Male threaded section 6 Engagement protrusion 10 Thin weakened part 11 gaps 12 Mounting cylinder part 13 Outer flange portion 14 Threaded section 14a Longitudinal ribs 15 Locking projection 16 groove 20 Stopper tube 21 Inner flange portion 22 Bottom wall 23. Thumb part 23a Tip 23b Continuous part 24 Notch

Claims

1. A cap comprising an outer cap fitted to the outer circumference of the mouth of the container body, and a stopper body connected to the upper part of the outer cap via a detachable thin-walled weakened portion, which seals the inner circumference of the mouth, The outer cap has a mounting cylinder portion whose inner circumference is fitted onto the outer circumference of the mouth of the container body, an outer flange portion extending inward from the upper end of the inner circumference of the mounting cylinder portion, with its lower surface abutting the upper end surface of the mouth, and a threaded portion provided on the inner circumference of the mounting cylinder portion that can be screwed into the mouth. The stopper body has a stopper cylinder whose outer circumference is press-fitted into the inner circumference of the opening, an inner flange portion extending outward from the upper end of the stopper cylinder with its lower surface abutting the upper end surface of the opening, a bottom wall that closes the lower inner end of the stopper cylinder, and a knob portion that is bendably erected from the upper surface of the bottom wall. A cap characterized in that, when the cap is opened, the outer cap rises while breaking the thin, weakened section by rotation, and the stopper body separated from the outer cap can be pulled up from the opening using the tab.

2. The cap according to claim 1, characterized in that the mounting cylinder portion has a plurality of vertical ribs on its inner circumference as threaded portions.

3. The outer flange portion has a groove into which the tip of the knob portion of the plug body is inserted. The cap according to claim 1, characterized in that the inner circumferential flange portion is continuous with the groove portion of the outer circumferential flange portion and has a recessed notch portion into which a bent knob portion fits.

4. The cap according to any one of claims 1 to 3, characterized in that the thinned-wall weakened portion is formed intermittently with a gap in between.

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