JPH0457754A - Container lid - Google Patents

Abstract

PURPOSE:To prevent the premature rupture of a container lid due to a doming phenomenon and permit the same to be ruptured very easily when a chemical is used by a method wherein the structure of a sealing member is made up of a main thin wall part and a plurality of reinforcing rib parts provided on this thin wall part extending radially and spaced circumferentially. CONSTITUTION:A sealing member 8 on a container lid 2 has a main thin wall part 28 and a plurality of reinforcing rib parts 30 provided on the main thin wall part 28 extending radially and spaced circumferentially. Preferably, the three rib parts 50 are formed circumferentially in an equally spaced relation. In this way, at the time of heat-treating a chemical container 32 at a high temperature, even if a radial stress is produced on the sealing member 28 due to the doming phenomenon of a top panel wall 10 of an inner lid 4 and a top panel wall 18 of an outer lid 6 the sealing member is retained in its shape without suffering premature rupture. When the chemical contained in the container is used, the outer lid 6 is pulled up forcibly with a curl 26 held between the fingers to produce stress concentration on the sealing member 8 so as to cause the progress of the rupture of the sealing member 28 take place very easily.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a container that is fitted onto the mouth and neck of a drug solution container equipped with a synthetic or natural rubber inner stopper that can be penetrated by an injection needle or a dispensing tube. Concerning a container lid particularly suitable for.

[Prior Art] As is well known to those skilled in the art, in containers for medicinal solutions such as injectable medicinal solutions or infusion medicinal solutions, a synthetic or natural rubber inner stopper that can be penetrated by an injection needle or dispensing tube is used in the container. The device is attached to the mouth and neck of the patient, thus sealing the mouth and neck.

Further, a container lid is fitted onto the mouth and neck portion to which the inner stopper is attached, in order to prevent contamination of the inner stopper through which the injection needle or dispensing tube is directly passed. A typical example of such a container lid is disclosed in Japanese Patent Application Laid-Open No. 60-77873.
For example, the container lid disclosed in the publication No.

This container lid is composed of a combination of an inner lid, an outer lid, and a sealing member. The inner lid has a top wall and a cylindrical skirt wall that hangs down from the periphery of the top wall, and an opening is formed in the center of the top wall. The outer lid has a top wall that covers the opening formed in the top wall of the inner lid. The annular sealing member is disposed across the inner surface of the top wall of the inner lid and the inner surface of the top wall of the outer lid. It is strongly adhered to one of the two, but it is weakly adhered to the other so that it can be peeled off.

The container lid is fitted onto the neck of the container, and the lower end of the skirt wall of the inner lid is engaged with the neck. When using the medicinal solution in the container, place your finger on the outer lid and force it to rise. In this way, if the sealing member is weakly bonded to the inner surface of the top wall of the outer lid, the sealing member will be peeled off from the outer lid, and only the outer lid will be removed, and the radially inner side of the annular sealing member will be removed. In the area the inner plug is exposed. If the sealing member is weakly bonded to the inner surface of the top wall of the inner lid, the sealing member will be peeled off from the inner lid, and the sealing material will be removed along with the outer lid, causing the opening formed in the top wall of the inner lid to open. The inner plug is exposed in the entire area. Thereafter, a syringe needle or a spouting tube is passed through the exposed inner stopper, and the drug solution is poured out.

[Problems with conventional technology]

However, the conventional container lid described above has the following problems to be solved. After a medicinal solution is placed in a container and an inner stopper and container lid are attached to the mouth and neck as required, high-temperature heat treatment is often performed.

A sufficiently strong bond between one of the inner surface of the top wall of the inner lid and the inner surface of the top wall of the outer lid and the sealing material can sufficiently withstand high temperatures; Peelable weak adhesion between the inner surface of the face wall and the sealing member is often damaged by the high temperature. When the weak adhesion is damaged and peeling occurs, the sealing by the sealing member is damaged, and steam, high-temperature water, etc. used during high-temperature heat treatment enter the inner plug surface. Also, during high-temperature heat treatment, considerable high pressure is generated within the container, and due to this high pressure generated within the container, the so-called doming phenomenon (upward movement) occurs between the top wall of the inner lid and the top wall of the outer lid. A phenomenon in which a dome-like bulge occurs. Such doming phenomenon also promotes damage to weak adhesion.

In order to solve the above problems of the prior art, it is necessary to adhere the sealing member sufficiently firmly to both the inner surface of the top wall of the inner lid and the inner surface of the top wall of the outer lid.

However, in this case, when the outer cover is forcibly raised and separated from the inner cover, it becomes necessary to break the sealing member, for example, along the periphery of the opening formed in the top wall of the inner cover. In order to make it easy enough for even a woman such as a nurse to break the sealing member, it is generally necessary to make the wall thickness of the breaking portion of the sealing member considerably thinner. On the other hand, if the wall thickness of the fractured portion of the sealing member is made too thin, there is a risk that the sealing member may break prematurely due to the doming phenomenon during the high temperature heat treatment. Reliably preventing early rupture due to the doming phenomenon described above and ensuring rupture sufficiently easily when using chemical solutions are generally contradictory issues, and a solution that satisfies both has not yet been proposed. It has not been.

[Problem to be solved by the invention]

The present invention has been made in view of the above facts, and the technical problem to be solved is to sufficiently firmly adhere a sealing member to both the inner surface of the top wall of the inner lid and the inner surface of the top wall of the outer lid. In addition to solving the above-mentioned problems with conventional container lids, a unique technical idea has been adopted for the sealing member to meet the two contradictory requirements mentioned above, namely, to reliably prevent premature breakage due to the doming phenomenon and to prevent the use of chemical liquids. The purpose is to make it sufficiently easy to break.

[Means for solving the invention]

As a result of extensive research and experiments, the present inventors have found that stress acts on the sealing member approximately evenly over the entire circumferential direction during the above-mentioned doming phenomenon. Focusing on the fact that stress is concentrated at a specific angular position on the sealing material when it is forcibly raised, sealing members are placed in the thin main part and in this main part at intervals in the circumferential direction. It has been found that the above technical problem can be achieved by providing a plurality of reinforcing rib portions extending from one side to the other.

That is, according to the present invention, there is provided a metal inner lid having a top wall having an opening formed in the center and a cylindrical skirt wall hanging down from the periphery of the top wall; a metal outer lid having a top wall covering the opening; a synthetic resin sealing member disposed across the inner surface of the top wall of the inner lid and the inner surface of the top wall of the outer lid; In the container lid, the sealing member is bonded to both the inner surface of the top wall of the inner lid and the inner surface of the top wall of the outer lid, and the outer lid is attached to the inner lid. When the inner cover is forcibly raised, the sealing member is broken along the periphery of the opening formed in the top wall of the inner cover, and the outer cover is separated from the inner cover, The container lid is characterized in that the sealing member has a thin main portion and a plurality of reinforcing rib portions that are circumferentially spaced apart from each other and extend in the radial direction.

Advantageously, the main portion of the sealing member is generally disc-shaped. At the periphery of the opening formed in the top wall of the inner lid, the reinforcing rib portion of the sealing member has a circumferential width W1 of 1.
5 to 5, and the circumferential interval W2 between the reinforcing rib portions is 5.
It is preferable that the circumferential interval W2 is set to be larger than the circumferential width W1. It is preferable that three or five reinforcing rib portions are formed at equal intervals in the circumferential direction.

[Action of the invention]

In the container lid of the present invention, when a doming phenomenon occurs between the top wall of the inner lid and the top wall of the outer lid during high-temperature heat treatment, the sealing member is subjected to stress approximately uniformly over the entire circumferential direction. is generated, the reinforcing effect of the plurality of reinforcing ribs arranged at intervals in the circumferential direction is fully exhibited, and thus early breakage of the sealing member is reliably prevented. On the other hand, when a nurse or the like places a finger on the outer periphery of the outer cover and forces it upward when using a medical solution, stress is generated concentrated in a specific angular range of the sealing member. Then, due to this stress, the sealing member starts to break in a thin region other than the reinforcing rib portion. - Once the rupture is initiated, the reinforcing rib portion can also be ruptured easily enough so that the sealing member can be continuously disposed in the circumferential direction along the periphery of the opening formed in the top wall of the inner lid as required. can be easily broken.

The circumferential width of the reinforcing rib portion at the rupture site of the sealing member, that is, the periphery of the opening formed in the top wall of the inner lid, is somewhat smaller than the width of a normal finger, and the circumferential spacing of the reinforcing rib portion is If the width is set larger than the normal finger width,
Even if a finger is applied to an arbitrary angular position on the peripheral edge of the outer lid, stress is reliably generated in the thin portion of the sealing member that is not the reinforcing rib portion, and the beginning of breakage of the sealing member is reliably realized.

[Preferred specific examples of the invention]

Hereinafter, preferred embodiments of the container lid constructed according to the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, the illustrated container lid, generally designated by the numeral 2, is comprised of an inner lid 4, an outer lid 6, and a sealing member 8. The inner lid 4, which can be formed from a suitable metal thin plate such as an aluminum-based alloy thin plate, a tinplate thin plate, or a chromic acid treated steel thin plate, has a circular top wall 10 and a circular top wall 10.
and a cylindrical skirt wall 12 depending from the periphery of the cylindrical skirt wall 12 .

A circular opening 14 is formed in the center of the top wall 10.

An annular protrusion 16 is formed on the peripheral edge of the top wall 10 and protrudes downward in the axial direction. The outer cover 6, which like the inner cover 4 can be formed from a suitable thin metal plate such as an aluminum-based alloy thin plate, a tin plate, or a chromic acid-treated steel thin plate, has a circular top wall 18 and a peripheral edge of the top wall 18 that hangs down from the top wall 18. It has a cylindrical skirt wall 22. An annular protrusion 24 that protrudes downward in the axial direction is formed at the peripheral edge of the top wall 18 in correspondence with the annular protrusion 16 on the inner lid 4 . An inward curl 26 is formed at the lower end of the skirt wall 22. The inner diameter of the outer cover 6 defined by the radially inner edge of the inner curl 26 is substantially the same as or somewhat larger than the outer diameter of the skirt wall 12 of the inner cover 4. As shown in FIG. 1, the outer cover 6 is fitted onto the inner cover 4, and the top wall 18 of the outer cover 6 is attached to the inner cover 4.
It is laminated on the top wall 10 of. Thus, the opening 14 formed in the top wall 10 of the inner lid 4 is covered by the top wall 18 of the outer lid 6. The annular protrusion 24 formed on the top wall 18 of the outer lid 6 is stacked on the annular protrusion 16 formed on the top wall 10 of the inner lid 4.

The sealing member 8 in the illustrated example is approximately disk-shaped,
It is disposed astride the inner surface of the top wall 10 of the inner lid 4 and the inner surface of the top wall 18 of the outer lid 6. The sealing member 8, which can be made of a suitable synthetic resin material such as vinyl chloride resin, is sufficiently firmly adhered to both the inner surface of the top wall 10 of the inner lid 4 and the inner surface of the top wall 18 of the outer lid 6. This is very important. Such a sealing member 8 is attached to the inner lid 4 assembled as required.
It can be conveniently formed by supplying a resin material in a softened and molten state to the inner surfaces of the top walls 10 and 18 of the outer lid 6 and pressing the resin material. In this case,
Before molding the sealing member 8, the inner surface of the top wall 10 of the inner lid 4 and the inner surface of the top wall 18 of the outer lid 6 are coated with a suitable adhesive, and when the sealing member 8 is molded by molding, the molding inevitably occurs. It is convenient that the sealed sealing member 8 is adhered to the inner surface of the top wall 10 of the inner lid 4 and the inner surface of the top wall 18 of the outer lid 6. Referring to FIGS. 2 and 3 together with FIG. 1, the sealing member 8 in the container lid 2 constructed according to the present invention includes a thin main portion 28 and thin main portions spaced apart in the circumferential direction. It is important to have a plurality of radially extending reinforcing ribs 30 disposed at 28. In the illustrated example, three reinforcing rib portions 30 are formed at equal intervals in the circumferential direction. An even number of reinforcing ribs 3 such as 4 or 6
Although it is possible to form 0 reinforcing rib portions 30, it is preferable to form an odd number of reinforcing rib portions 30, which may be 3 or 5, at equal intervals in the circumferential direction. When an even number of reinforcing ribs 30 are formed at equal intervals in the circumferential direction, two reinforcing rib portions 30 extend continuously in the diametrical direction of the sealing member 8. When breaking and removing the outer cover 6, when a finger is placed on the outer cover 6 at a diametrical angular position where the two reinforcing rib portions 30 continuously extend, the sealing member 8 easily starts to break. Sexuality tends to be somewhat inhibited. When three or five reinforcing rib parts 30 are formed at equal intervals in the circumferential direction, two reinforcing rib parts 30 do not extend continuously in the diametrical direction, and the above-mentioned problem occurs. will definitely be avoided. 7
Although it is possible to form one or more reinforcing rib parts 30, if the number of reinforcing rib parts 30 becomes excessive, the sealing member 8
The above-mentioned ease of rupture initiation is reduced. As will be further described later, when the outer cover 6 is separated from the inner cover 4, the sealing member 8 is broken along the periphery of the opening 14 formed in the top wall 10 of the inner cover 4. 14, the circumferential width W1 of each reinforcing rib portion 300 is somewhat smaller than the width of a finger, and is preferably about 1 to 5 fl. On the other hand, each reinforcing rib portion 3 at the periphery of the opening 14
The circumferential interval W2 of 0 is preferably larger than the circumferential width W1, and approximately 5 to 10. In such a case, as will be described later, when the outer cover 6 is forcibly raised by placing one's finger on the outer cover 6 in order to remove the outer cover 6,
No matter which angular position the finger is placed on, no matter which position is aligned with the church reinforcing rib part 30, concentrated stress acts not only on the reinforcing rib part 30 but also on the other thin main part 28,
The initiation of rupture of the sealing element 8 is therefore achieved with sufficient ease. The thickness T1 of the reinforcing rib portion 30 of the sealing member 8 and the thickness T2 of the other thin main portion 28 can be set as appropriate depending on the material strength of the sealing member 8. When molding the member 8, T1 is approximately 0.5 to 1.0 mm, and T2 is approximately 1.1 to 1.4 mm.
A certain amount is enough.

The container lid 2 as described above is particularly suitable for fitting onto the mouth and neck of a drug solution container equipped with a synthetic or natural rubber inner stopper that can be penetrated by an injection needle or a dispensing tube. Continuing the explanation with reference to FIG. 4, a generally cylindrical mouth and neck portion 34 of a known chemical solution container 32, only a part of which is shown, is made of synthetic or natural rubber. A plug 36 is attached. Inner stopper 36 in the illustrated example
has a circular main part 38 and a cylindrical hanging part 40, the peripheral edge of the circular main part 38 is brought into close contact with the top surface of the mouth and neck part 34, and the cylindrical hanging part 40 is inserted into the mouth part 34. Its outer peripheral surface is brought into close contact with the inner peripheral surface of the mouth and neck portion 34.

When fitting the container lid 2 onto the mouth part 34 to which the inner stopper 36 is attached, as shown in FIG. and while maintaining this pressing state, the skirt wall 12 of the inner lid 4
The lower end portion is bent radially inward and engaged with a locking jaw portion 42 formed on the outer peripheral surface of the mouth and neck portion 34.

In this way, the inner stopper 36 is covered by the container lid 2. Then, the annular protrusion 16 formed on the top wall 10 of the inner lid 4 is pressed against the upper surface of the inner plug 36, and the space between the two is sufficiently tightly sealed. Further, the opening 14 formed in the top wall 10 of the inner lid 4 is covered by the top wall 18 of the outer lid 6, and the inner surface of the top wall 10 of the inner lid 4 and the top wall 1 of the outer lid 6
It is tightly sealed by a sealing member 8 which is sufficiently firmly bonded to both the inner surface of the holder 8 and the inner surface of the holder 8 . In this way, moisture, dust, etc. are reliably prevented from entering the central portion of the upper surface of the inner stopper 36 (through which the injection needle or spout tube is passed). When the chemical liquid container 32 is subjected to high temperature heat treatment,
Considerable pressure is generated within the chemical solution container 32, causing the top wall 10 of the inner lid 4 and the top wall 18 of the outer lid 6 to bulge upward in the axial direction (doming phenomenon). Thus, due to the difference between the degree of doming of the top wall 10 of the inner lid 4 and the degree of doming of the top wall 18 of the outer lid 6, radial stress is generated in the sealing member 8 over its entire circumferential direction. However, since the reinforcing rib portions 30 are provided on the sealing member 8 at intervals in the circumferential direction, the sealing member 8 is maintained without being prematurely broken.

When using the medicinal solution stored in the medicinal solution container 32 for injection or dripping, etc., the outer cap 6 is forced by placing a finger on the curl 26 formed at the lower end of the skirt wall 22 of the outer cap 6. increase the target. In this way, concentrated stress is generated in the sealing member 8 at the specific angular position where the finger was applied,
The sealing member 8 begins to break due to such stress. When the sealing member 8 is torn, the periphery of the opening 14 formed in the top wall 1o of the inner lid 4 functions as a cutting edge, and therefore the sealing member 8 is cut along the periphery of the opening 14. It should be noted in particular that in the container lid 2 constructed according to the present invention, the reinforcing rib portions 3G are disposed on the sealing member 8 at intervals in the circumferential direction, and a thin wall is provided between the reinforcing rib portions 30. The main portion 28 remains as it is. The concentrated stress acts on the thin main portion 28 at a specific angular position, and the sealing member 8 starts to break at this location. Thus, once the rupture begins, the reinforcing rib portion 30 can be easily removed from the sealing member 8.
rupture progresses. Therefore, even a woman such as a nurse can easily break the sealing member 8. As the outer cover 6 rises, the sealing member 8 is progressively broken, and the opening 1 formed in the top wall 10 of the inner cover 4 is opened.
When the sealing member 8 is continuously broken in an annular manner in the circumferential direction along the line 4, the outer cover 6 is completely separated from the inner cover 4 and removed. Then, as shown in FIG. 5, the upper surface of the inner plug 36 is exposed through the opening 14 in the top wall 10 of the inner lid 4. After that, the medicinal liquid in the medicinal liquid container 32 can be poured out by passing an injection needle or a spouting tube through the center of the inner stopper 36.

〔Effect of the invention〕

In the container lid of the present invention, even if a doming phenomenon occurs on the top wall of the inner lid and the top wall of the outer lid during high-temperature heat treatment, there is no risk of premature breakage of the sealing member. When opening the container, a nurse or the like can easily break the sealing member.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a preferred embodiment of a container lid constructed according to the present invention. FIG. 2 is a bottom view of the container lid of FIG. 1. FIG. 3 is a developed cross-sectional view along the outer periphery of a circular opening formed in the top wall of the inner lid, for showing variations in the circumferential thickness of the sealing member in the container lid of FIG. 1; FIG. 4 is a sectional view showing a state in which the container lid of FIG. 1 is attached to the mouth and neck of a liquid medicine container with an inner stopper attached. FIG. 5 is a sectional view showing a state in which the sealing member is broken and the outer lid is removed from the mouth and neck of the liquid medicine container. 2...Container lid 4...Inner lid 6...Outer lid 8...Sealing member 10...Inner lid top wall 12...Inner Skirt wall 14 of the lid...Circular opening 18...Top wall 22 of the outer cover...Skirt wall 28 of the outer cover...Thin main portion 30 of the sealing member... ...Reinforcement rib 32 of the sealing member ...Medicinal solution container 34 ...Mouth and neck part 36 ...Inner stopper Fig. 3 Fig. 4 Fig. 2

Claims (1)

[Claims] 1. A metal inner lid having a top wall with an opening formed in the center and a cylindrical skirt wall hanging down from the periphery of the top wall; a metal outer lid having a top wall covering the opening; a synthetic resin sealing member disposed across the inner surface of the top wall of the inner lid and the inner surface of the top wall of the outer lid; In the container lid, the sealing member is bonded to both the inner surface of the top wall of the inner lid and the inner surface of the top wall of the outer lid, and the outer lid is attached to the inner lid. When the inner cover is forcibly raised, the sealing member is broken along the periphery of the opening formed in the top wall of the inner cover, and the outer cover is separated from the inner cover, A container lid characterized in that the sealing member has a thin main portion and a plurality of reinforcing rib portions that are circumferentially spaced from each other and extend in the radial direction. 2. Claim 1, wherein the main portion of the sealing member is approximately disk-shaped.
Container lid as described. 3. At the periphery of the opening formed in the top wall of the inner lid, the reinforcing rib portion of the sealing member has a circumferential width W1 of 1.
5 mm to 5 mm, and a circumferential interval W2 between the reinforcing rib portions is 5 to 10 mm, and the circumferential interval W2 is set larger than the circumferential width W1.
Container lid as described. 4. The reinforcing rib portions are arranged in three or five pieces at equal intervals in the circumferential direction.
The container lid according to any one of claims 1 to 3, which is individually formed.