JP2004059032A - Inner plug and cap with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic-resin-made inner plug to be fitted into a neck 2 of a container body C, which is easy to remove, is easy to hook a finger even in the plug applicable to a container with a small neck, is simple in structure and can be inexpensively manufactured. <P>SOLUTION: The inner plug exhibits a bottomed dishlike form having a flange 5 to be fitted over the neck 2 extending from the upper end of the peripheral wall 3 to be fitted into the upper end of the inner periphery of the neck 2 and having an integrally connected semicircular handle 8 with both ends coupled with a pair of support levers 7 standing from the upper surface of a bottom wall 4. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an inner plug and a cap provided with the inner plug.
[0002]
[Prior art]
A variety of inner plugs are provided for the purpose of imparting tightness to the container body. As a general form of these inner plugs, the mouth and neck are tightly fitted to the upper end of the inner wall of the mouth and neck from the upper edge of the peripheral wall closely fitted. And a bottomed cylindrical shape in which a flange to be fitted on the portion is extended. In addition, the peripheral wall is fitted to the outer periphery of the mouth and neck with the inner plug attached, and the cap is detachably attached.
[0003]
Although the inside and outside of the container can be reliably shut off by the presence of the inner plug and sufficient airtightness can be provided, it is difficult to remove the inner plug when opening the container. From such a point, there has been proposed an inner plug having a pull ring attached thereto. (For example, JP-A-2000-95258). These inner plugs are formed by integrally extending a ring for finger hooking from the upper part of a support rod erected from the upper surface of the bottom wall, and the inner plug can be removed by hooking the ring and pulling up at the time of opening. It is configured as follows. Further, a ring has been proposed in which the ring is formed in the shape of an inscribed circle of the peripheral wall and protruded from the upper portion of the peripheral wall.
[0004]
[Problems to be solved by the invention]
Although the above-mentioned plug with a pull ring can be easily removed, the diameter of the ring is reduced by the amount attached to a small container of the mouth and neck for convenience of storing the pull ring in the peripheral wall. It becomes smaller, and it becomes hard for your fingers to hang. In addition, since the force applied to the ring is concentrated at one point on the bottom wall of the lower end of the support rod, it is unlikely that the pressure contact surface between the peripheral wall and the inner surface of the mouth and neck portion is peeled off. In the latter case, the force applied to the ring is transmitted to two points on the peripheral wall, but due to its structure, the end of the ring must be connected to the upper end of the peripheral wall. It takes power to pull it out.
[0005]
In addition, it is difficult to remove these inner plugs as the sealing thereof is more reliable. Particularly, when the stored liquid is subjected to high-temperature sterilization or the like, the inside of the container is negatively pressurized, which is more remarkable. Therefore, in such a case, if the pull ring is pulled up to pull out the inner plug, the mouth and neck of the container is shaken by the impact, and the liquid in the container is easily scattered.
[0006]
The present invention has been made in view of the above points, does not require force at the time of removal, is easy to put a finger even in those applied to a small container of the mouth and neck, and minimizes the scattering of liquid at the time of removal. The present invention proposes an excellent inner plug that can be prevented, has a simple structure, and can be manufactured at low cost.
[0007]
[Means for Solving the Problems]
In order to solve the above problem, the inner plug of the first aspect of the present invention is a synthetic resin inner plug fitted to the mouth and neck portion 2 of the container C, and fitted to the upper end of the inner periphery of the mouth and neck portion 2. A semi-annular handle having a bottomed dish shape with a flange 5 extending from the upper edge of the peripheral wall 3 on the mouth and neck portion 2 and connected to a pair of support rods 7 erected from the upper surface of the bottom wall 4. 8 was integrally extended and constituted as an inner plug.
[0008]
The inner plug according to the second aspect of the present invention is configured as the inner plug according to the first aspect, wherein each of the support rods 7 and a peripheral wall portion adjacent to each of the support rods are integrally connected by a connecting plate 16.
[0009]
The inner plug according to the third aspect of the present invention is configured such that each support rod 7 stands from the outer peripheral portion of the bottom wall 4 and the outer peripheral portion of the bottom wall 4 projects upward or downward. It was constituted as.
[0010]
In the cap of the fourth aspect, the outer peripheral edge of the flange is fitted and locked on the inner surface of the upper end of the peripheral wall to be fitted to the container body neck. The cap described in any one of (1) to (5) is attached.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
FIG. 1 shows an inner plug A of the present invention and a cap B provided with the inner plug A. The inner plug A is fitted to the mouth and neck portion 2 of the container body C, and a peripheral wall 3 to be closely fitted to the inner peripheral upper end of the mouth and neck portion 2 is erected from the peripheral edge of the bottom wall 4. It has a bottomed cylindrical shape with a flange 5 extending from the upper edge to the upper surface of the mouth and neck portion 2.
[0013]
A sealing ridge 6 having a relatively small projection width is provided on the outer peripheral upper portion of the peripheral wall 3 so as to provide reliable airtightness between the outer surface of the peripheral wall 3 and the inner surface of the mouth and neck portion 2. The protrusion width is preferably about 0.2 mm, but is not particularly limited. In addition, the lower end of the peripheral wall 3 has a diameter smaller than that of the inner peripheral surface of the mouth-neck portion 2 so that the lower-end portion can be easily fitted to the mouth-neck portion 2.
[0014]
Further, a handle 8 is integrally extended via a pair of support rods 7 erected from the upper surface of the bottom wall 4. Each support rod 7 is erected at a predetermined interval from the upper surface of the bottom wall 4, and its protruding position is not particularly limited as long as it can support the handle 8. In consideration of what is to be done, it is preferable to protrude from a position relatively close to the peripheral wall 3. The handle 8 has a semi-annular shape in which both ends are connected to the upper end of each support rod 7, and specifically, as shown in FIG. 2, the handle 8 may have a U-shape in plan view. As shown in FIG. 4, the shape may be an arc shape in plan view.
[0015]
The cap B is fitted by fitting the peripheral wall to the outer periphery of the mouth and neck, and the inner plug A is fitted to the upper end of the inner surface of the peripheral wall by fitting and locking the outer peripheral edge of the flange 5. The inner plug A can be automatically attached to the mouth and neck 2 at the same time as the container is attached to the container C. As a method of fitting and locking the outer peripheral edge of the flange 5 to the inner surface of the cap peripheral wall, the outer surface of the flange may be directly fitted tightly to the inner peripheral surface of the peripheral wall. By engaging over the locking ridge projected at a predetermined position on the inner peripheral upper portion of the peripheral wall, the mounting operation can be performed more smoothly.
[0016]
In any case, it is necessary to form the outer peripheral edge of the flange so that it can pass from the inner peripheral lower end to the upper end of the peripheral wall. For example, in the case where an engaging portion that elastically deforms is provided. In this state, the engaging portion can pass above the thread formed on the inner periphery of the peripheral wall and can cross over and engage above the locking ridge. If there is no engaging portion, the thread is formed. The diameter of the flange outer peripheral surface is formed to be smaller than the diameter of the portion and substantially the same as the upper end of the inner peripheral wall of the peripheral wall.
[0017]
In the illustrated example, the cap B has a top cylindrical shape in which a top wall 11 is extended from an upper end of the peripheral wall 10, and a screw 13 which is screwed with a screw 12 of the mouth-neck portion 2 is provided in a lower portion of the inner peripheral portion of the peripheral wall 10. In addition, a locking ridge 14 is provided at a predetermined position above the screw 13. On the other hand, on the outer periphery of the flange 5 of the inner plug A, eight elastic projecting pieces 15 as engaging portions are provided so as to protrude at intervals in the circumferential direction. Then, the inner plug A is inserted from the lower end opening of the cap B, and the respective elastic protruding pieces 15 are engaged with the locking protrusions 14 so as to be temporarily fixed. When the cap B is screwed onto the container C from this state, the inner plug A is pushed down by the cap top wall 11 and is tightly fixed in the mouth and neck portion 2. Further, when the cap B is unscrewed during use, the fitting strength between the inner plug peripheral wall 3 and the mouth / neck portion 2 is enhanced, and each elastic protruding piece 15 is elastically deformed and climbs over the locking ridge 14, so that the cap B Is removed.
[0018]
Next, the inner stopper A can be removed by pulling up the handle 8. The removed inner plug A may be discarded as it is, or it may be used by being fitted again. The presence of the support rod 7 and the handle 8 causes the bottom wall 4 to be deformed in a wide range from two spaced apart points when the handle 8 is lifted, thereby causing deformation of a wide portion of the peripheral wall 3 and causing the outer surface of the peripheral wall 3 to be deformed. And the inner surface of the mouth and neck 2 is peeled off over a wide area, and the inner plug A can be easily removed.
[0019]
In the present invention, as shown in FIG. 6, each support rod 7 may be connected to the peripheral wall 3 portion adjacent to each support rod by a connection plate 16. With this configuration, when the handle 8 is pulled up, the peripheral wall 3 is directly and widely deformed from the bottom wall 4 so that the close contact between the outer surface of the peripheral wall 3 and the inner surface of the mouth / neck portion 2 is more reliably peeled off, which is easier. The inner plug A can be removed at the same time. The connecting plate 16 may have an open upper end as shown in the illustrated example, or may have a structure extending over the entire space therebetween. Further, the connecting plate 16 may be provided between the one support rod 7 and the portion of the peripheral wall 3 adjacent to the support rod, or may be provided between both.
[0020]
Further, in the present invention, as in the embodiment of FIGS. 1 and 6, the outer peripheral portion of the bottom wall 4 may be protruded downward, and each support rod 7 may be erected from the outer peripheral portion. Since the lower end of the inner plug peripheral wall 3 is configured to have a smaller diameter than the inner diameter of the mouth and neck portion 2, the lower end of the inner plug peripheral wall 3 is loosely inserted into the mouth and neck portion. The inner plug A is compressed by fitting to the inner surface of the mouth and neck. If the inner plug bottom wall 4 is horizontal, the tip of the handle 8 attached to the upper end of the support rod 7 that rises from the bottom wall 4 moves due to the inclination of the support rod 7, but the inner plug bottom wall is bent downward in advance. If this is done, the movement width decreases due to the diameter reduction. Therefore, the inclination angle of the handle is also reduced.
[0021]
Note that such an effect is not limited to the case where the bottom wall of the inner plug is curved downward spherically as in the above-described embodiment, but also occurs when the inner stopper bottom wall is curved upward. Even with a tapered or trapezoidal shape, the inclination angle of the handle can be reduced. In short, the inner plug peripheral wall may be reduced in diameter when the inner plug is fitted into the mouth and neck of the container body, and the tapered portion of the outer peripheral portion of the bottom wall may be deformed. There may be a non-tapered portion on the outer periphery.
[0022]
【The invention's effect】
As described above, the inner plug of the present invention having the above-described configuration can provide the container body with a reliable seal when not in use, and can be easily removed by pulling up the handle when in use. . Further, when the mouth and neck of the container body to be mounted is small, for example, the width of each support rod can be widened and the handle can be formed in a U-shape, so that it has an advantage that the finger can be more easily inserted. .
[0023]
In the plug of the second aspect of the present invention, the bottom wall and the peripheral wall can be uniformly deformed when the handle is lifted, and the close fitting portion between the peripheral wall and the mouth and neck can be more easily peeled off. As a result, the entire inner peripheral wall of the inner plug comes off from the inner surface of the mouth and neck after peeling. Therefore, even if the inside of the container is under negative pressure, outside air enters the container through the separated portion to eliminate the negative pressure state, thereby removing the inner plug. The impact at the time of withdrawal can be reduced, and it can be more easily removed from the container. In addition, due to the reduction of the impact, scattering of the liquid at the time of removal can be prevented as much as possible.
[0024]
Further, the inner plug according to the third aspect of the present invention also has an advantage that it is possible to prevent an undesired inclination of the handle due to the contraction of the bottom wall when the mouth and neck portion is fitted.
[0025]
Further, the cap according to the fourth aspect of the present invention has an advantage that the inner plug as described above can be automatically attached when the cap is screwed to the mouth and neck, thereby simplifying the assembling work. .
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.
FIG. 2 is a plan view of the inner plug of the embodiment.
FIG. 3 is a partially cutaway perspective view of the inner plug of the embodiment.
FIG. 4 is a plan view showing another embodiment of the inner plug according to the present invention.
FIG. 5 is a vertical sectional view of the embodiment.
FIG. 6 is a longitudinal sectional view showing still another embodiment of the present invention.
[Explanation of symbols]
2 ... mouth and neck, 3 ... inner plug peripheral wall, 4 ... inner plug bottom wall, 5 ... flange, 7 ... support rod, 8 ... handle, 10 ... cap peripheral wall, 16 ... connecting plate, C ... container body

Claims (4)

A synthetic resin inner plug fitted to the mouth-neck portion 2 of the container C, and a flange 5 fitted on the mouth-neck portion 2 from an upper edge of a peripheral wall 3 fitted to an inner peripheral upper end portion of the mouth-neck portion 2. And a semi-annular handle 8 having both ends connected to a pair of support rods 7 erected from the upper surface of the bottom wall 4 and integrally extending therefrom. . 2. The inner plug according to claim 1, wherein each of said support rods 7 and a peripheral wall portion adjacent to each of said support rods are integrally connected by a connection plate 16, respectively. 2. The inner plug according to claim 1, wherein each support rod is raised from an outer peripheral portion of the bottom wall, and the outer peripheral portion of the bottom wall is projected upward or downward. The inner plug according to any one of claims 1 to 3, wherein the outer peripheral edge of the flange 5 is fitted and locked on the inner surface of the upper end of the peripheral wall 10 to be fitted to the container body neck portion 2. A cap characterized by being made to let.

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