JPH0678100B2 - Composite container lid - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a composite container lid, and more particularly to a composite container lid including a combination of a metal or synthetic resin shell and a synthetic resin coating.

<Prior Art> In a liquid medicine container for injection or drip, as is well known, a rubber inner stopper is attached to the mouth and neck of the container, and a container lid for covering the inner stopper is fitted and attached.

As the container lid, various forms have been proposed, but in view of manufacturing cost, hygiene, opening property, etc., a composite container lid as disclosed in Japanese Utility Model Publication No. 56-45332 is widely used. Have been used for. Such a composite container lid comprises a combination of a metal shell and a synthetic resin covering. The metal shell has a top wall and a cylindrical skirt wall hanging down from the peripheral edge of the top wall, and an opening is formed in the center of the top wall. The synthetic resin cover is releasably adhered to the upper surface of the top wall to close the opening formed in the top wall. The covering body has a gripping projection piece that projects radially outward beyond the peripheral edge of the top wall of the shell.

The composite container lid described above is formed on the outer peripheral surface of the container mouth neck by fitting the rubber container inside the container mouth neck and deforming the lower part of the shell skirt wall inward in the radial direction. It is attached to the neck of the container by locking it to the stop jaw. When using the chemical solution, the projecting piece for grasping the cover is grasped with a finger, the whole or a part of the cover is separated from the top wall of the shell, and thus the opening formed in the top wall is opened. Then, an injection needle or the like is inserted into the inner stopper through the opened opening, and the medicinal solution is poured out.

<Problems of Prior Art> However, the conventional composite container lid has the following problems to be solved.

That is, when the chemical solution is used, in order to separate the covering from the top wall of the shell, when the grasping protruding piece of the covering is gripped with a finger and the covering is pulled, slippage occurs between the grasping protruding piece and the finger. It is difficult to grip the gripping protruding piece with a finger with sufficient certainty because of the occurrence of such a phenomenon, and therefore, the covering cannot be easily separated from the top wall of the shell.

<Purpose of the Invention> The present invention has been made in view of the above facts, and its main object is to solve the above-mentioned problems existing in a conventional composite container lid, and to use a chemical solution, a lid for a container having a small diameter. Even if it is, it is to provide a novel and excellent composite container lid that can be easily and surely gripped with fingers to separate the covering from the top wall of the shell.

<Summary of the Invention> As a result of earnest studies, the inventors of the present invention have formed (a) an arcuate fracture line located radially outside the opening formed in the top wall of the shell in the coating, (B) The thickness of the outer peripheral edge portion is increased from the fracture line where the above-mentioned fracture line of the cover extends, and (c) the lower surface of the sheath is at least in the outer region from the outer periphery of the sheath to the above-mentioned fracture line. The upper surface of the top wall of the shell is made non-adhesive or weakly adhered, and in the inner annular region surrounding the opening formed in the top wall of the shell, the lower surface of the covering can be peeled off from the upper surface of the top wall of the shell. With the addition of an adhesive, when using a liquid medicine, even with a small-diameter container lid, it is possible to hang a finger on the peripheral portion of the coating body, which is formed in a wall thickness where the breaking line extends. Yes, and therefore well It has been found that the coating can be easily peeled off from the top wall of the shell.

That is, according to the present invention, a shell having a top wall having an opening formed in the center and a cylindrical skirt wall hanging down from the outer peripheral edge of the top wall, and a shell provided on the top wall of the shell. In a composite container lid comprising a combination with a synthetic resin covering for closing the opening; the covering has an arcuate breaking line located radially outside the opening, and at least the breaking line of the covering. The thickness of the outer peripheral edge portion is increased from the breaking line extending from the outer peripheral edge of the covering body to the breaking line, and the lower surface of the covering body is a top wall of the shell. A non-bonded or weakly bonded state to the upper surface of the shell, and the lower surface of the cover is peelably bonded to the upper surface of the top wall of the shell in the inner annular region surrounding the opening. And composite Vessel lid is provided.

<Preferred Specific Examples of the Invention> Hereinafter, with reference to the accompanying drawings, preferred specific examples of a composite container lid configured according to the present invention will be described in detail.

Structure of Composite Container Lid Explaining with reference to FIG. 1, a composite container lid generally denoted by reference numeral 2 is composed of a combination of a metal shell 4 and a synthetic resin cover 6.

The shell 4, which may be formed from any suitable metal sheet such as an aluminum-based alloy sheet, has a circular top wall 8 and a cylindrical skirt wall 10 depending from the periphery of the top wall 8. The central portion of the top wall 8 is substantially horizontal, but the peripheral portion is preferably raised. In the illustrated embodiment, the peripheral portion of the top wall 8 includes an inverted conical portion 12 that gradually rises radially outward, and is raised by the presence of the inverted conical portion 12. A circular opening 14, which may be circular, is formed in the central portion of the top wall 8.

As mentioned above, the shell 4 is conveniently formed from a suitable sheet metal, but if desired, it can also be formed from a suitable synthetic resin such as unsaturated polyester or polypropylene. In this case, a well-known locking protrusion that is elastically locked to a locking jaw formed on the outer peripheral surface of the mouth and neck of the container described later may be integrally formed on the lower inner surface of the skirt wall. it can.

The covering body 6 which can be formed of an appropriate synthetic resin such as an olefin resin is circular as a whole and has a cross-sectional shape along the cross-sectional shape of the top wall 8 of the shell 4. The cover 6 is arranged on the top wall 8 of the shell 4 and closes the opening 14. In the illustrated embodiment, the opening 14
Corresponding to the above, a circular bulging portion 15 bulging downward is formed on the lower surface of the central portion of the covering body 6, and the circular bulging portion 15 is immersed in the opening 14. The peripheral edge of the covering body 6 is substantially aligned with or slightly inward of the peripheral edge of the top wall 8 of the shell 4 without projecting radially outward beyond the peripheral edge of the top wall 8 of the shell 4. Is preferred.

Referring to FIG. 2 together with FIG. 1, an arc-shaped break line 16 is formed in the covering body 6. It is important that the break line 16 is located radially outside the opening 14 formed in the top wall 8 of the shell 4. In the illustrated example, the break line
16 is composed of a so-called score formed by reducing the material thickness. If desired, the break line 16 can be formed from so-called perforations, or the break line 16 can be formed from a slit that extends continuously. The break line 16 is at least 240 degrees or more, especially 2
It preferably extends over an angle range of 70 to 300 degrees. In addition, it is preferable that the peripheral edge portion of the cover 6 has an increased wall thickness at least in the angular range in which the breaking line 16 extends. In the illustrated specific example, the wall thickness of the peripheral portion of the covering body 6 is increased even in the angular range between both ends of the breaking line 16.
Therefore, a thick annular portion 17 is formed on the peripheral portion of the cover 6.

In the composite container lid 2 constructed according to the present invention, the lower surface of the covering body 6 is at least in the outer region located outside the breaking line 16 of the covering body 6 with respect to the upper surface of the top wall 8 of the shell 4. In the inner annular region which is unbonded or weakly bonded and surrounds the opening 14 formed in the central portion of the top wall 8, the lower surface of the cover 6 is the upper surface of the top wall 8 of the shell 4. It is important that it be releasably adhered to. In the illustrated example, the opening is opened from slightly inside the break line 16.
In the annular region 18 up to the peripheral edge of 14, that is, in the region 18 cross-hatched in FIG. 3, the lower surface of the covering body 6 is releasably adhered to the upper surface of the top wall 8 of the shell 4. In the entire outer region 20 of the region 18, the lower surface of the covering body 6 is not adhered to the upper surface of the top wall 8 of the shell 4. If desired, instead of the underside of the cover 6 being unbonded to the upper surface of the top wall 8 of the shell 4, it may be weakly bonded, i.e. remarkably easily peelable. Therefore, it is not always necessary to make the non-bonded or weakly bonded state in the angular range between both ends of the breaking line 16, and if desired, as shown in FIG. In the angular range, the region 18 where the peelable bond is established can extend to the periphery of the covering 6. Further, as shown in FIG. 5, the top wall 8 of the shell 4 is
A ring-shaped non-bonded or weakly bonded region 20 can be left around the opening 14 formed in.

As described above, in order to detachably adhere the lower surface of the covering body 6 to the upper surface of the top wall 8 of the shell 4 in the specific area 18, for example, in the above area 18, the upper surface of the top wall 8 of the shell 4 is formed. Adhesive film 22 (Fig. 1)
Can be adhered, and the lower surface of the covering body 6 can be adhered to the upper surface of the top wall 8 through the adhesive film 22. As the adhesive film 22, a cohesive failure type adhesive film is preferably used. Regarding the cohesive failure type adhesive film itself,
Since it is described in detail in Japanese Patent Publication No. 59-52096, its description is omitted in this specification. If desired, instead of adhering the adhesive film 22 to the upper surface of the top wall 8 in the area 18, an appropriate adhesive is applied to the upper surface of the top wall 8 and the lower surface of the covering body 6 is applied by the adhesive. It can also be peelably attached to the upper surface of the top wall 8.

On the other hand, making the lower surface of the cover 6 in the specific region 20 non-bonded or weakly bonded to the upper surface of the top wall 8 of the shell 4 is, for example, simply in the specific region 20, the top wall 8 only. It can be achieved by not adhering a film or applying a paint on the upper surface of the. If desired, a non-adhesive or weak-adhesive film may be attached to the upper surface of the top wall 8 or a non-adhesive or weak-adhesive paint may be applied to the upper surface of the top wall 8 in the specific region 20.

Manufacturing Method of Composite Container Lid A preferred manufacturing method of the composite container lid 2 as described above will be described below.

First, as shown in FIG. 6, a circular adhesive film B is attached to the surface of the metal thin plate A. The sticking can be performed by heating the thin metal plate A by an appropriate method and then pressing the adhesive film B on it.
In the case where the adhesive film B is heated and fluidized in the coating body compression molding step described later to cause inconvenience, the adhesive film B to be stuck is an aluminum foil and a strong adhesive layer (for example, polyethylene oxide-containing epoxy) on the upper surface of the adhesive film layer. It is possible to use a laminated body obtained by laminating a series resin layer). According to such a laminate, the flow of the adhesive film layer is surely prevented by the presence of the aluminum foil.
Of course, the adhesive film layer and the aluminum layer, the aluminum foil and the strong adhesive layer, the strong adhesive layer and the covering body 6 formed later,
Each of them is strongly adhered, and therefore the peeling of the shell 4 and the covering body 6 is realized by cohesive failure of the adhesive film layer as described later.

Next, the metal thin plate A to which the adhesive film B has been adhered is punched and drawn to form the metal shell 4 as shown in FIG. By the punching process, a circular opening 14 is formed in the top surface wall 8 of the shell 4, and the central portion of the circular adhesive film B is also punched out in a circular shape, so that the top surface wall 8 of the shell 4 is positioned around the opening 14. The ring-shaped adhesive film 22 that remains remains.

Next, as shown in FIG. 8, the metal shell 4 having the adhesive film 22 is fitted onto the compression molding anvil C. Then, the synthetic resin material D in a heated and melted state for forming the covering is supplied to the central portion of the upper surface of the anvil C. Thereafter, as shown in FIG. 9, the compression molding tool E is processed and the synthetic resin material D is compression molded into the covering body 6 having a required shape. Thus, the composite container lid 2 including the combination of the metal shell 4 and the synthetic resin cover 6 is completed.

Modes of Use and Actions of the Composite Container Lid The composite container lid 2 as described above is not particularly limited thereto, but is preferably used as a drug solution container for injection or drip.

Referring to FIG. 10, a drug solution container 23, which is known per se, has a substantially cylindrical mouth-neck part 24 having an open upper surface. A locking jaw portion 25 is formed on the outer peripheral surface of the mouth / neck portion 24. An inner stopper 26, which may be made of rubber, is attached to the mouth / neck portion 24 of the drug solution container 23.

When attaching the composite container lid 2 to the mouth / neck portion 24 to which the inner stopper 26 is attached, first, as shown in FIG.
The composite container lid 2 is fitted to the mouth / neck portion 24 to which 26 is attached. Then, the composite container lid 2, particularly the peripheral portion thereof, is pressed against the upper surface of the inner plug 26 by an appropriate pressing tool (not shown). Thus, as easily understood by comparing FIG. 10 and FIG. 11, the protrusion of the peripheral portion of the shell 4 in the composite container lid 2 is deformed downward so that it is substantially level with the central portion. To be Of course, when the peripheral portion of the shell 4 is deformed downward, the peripheral portion of the cover body 6 is also forced downward, but since the cover body 6 is made of synthetic resin, when the pressing by the pressing tool is released. The peripheral edge of the cover 6 elastically returns upward. Thus, a gap 28 is formed between the upper peripheral edge of the top wall 8 of the shell 4 and the lower peripheral edge of the cover 6. While the composite container lid 2 is being pressed against the upper surface of the inner stopper 26 by the pressing tool, the shell 2
The lower part of the skirt wall 10 is deformed inward in the radial direction by an appropriate deforming tool (not shown), and is locked by the locking jaw part 25 of the mouth / neck part 24. Thus, as shown in FIG. 11, the composite container lid 2 is attached to the mouth / neck portion 24.

When using the chemical solution contained in the container 23, first, at a portion diametrically opposed to the portion between both ends of the breaking line 16 (see also FIG. 2) in the covering body 6. Then, a finger is brought into contact with the lower surface of the peripheral portion of the cover 6 to force it upward. As a result, as shown in FIG. 12, the breaking line 16 is broken, and the arcuate peripheral edge portion 30 of the covering body 6 is raised. Such an operation is performed by applying a gap 28 (first gap) between the upper peripheral edge of the top wall 8 of the shell 4 and the lower peripheral edge of the cover 6.
(Fig. 11) exists, so it can be carried out sufficiently easily. Then, the arc-shaped peripheral edge portion 30 is raised.
Put your finger on the and pull the cover 6 upward. As a result, the adhesive film 22 is cohesively destroyed, and the cover 6 is peeled off from the top wall 8 of the shell 4. The peeling of the coating 6 is
Since it can be performed by putting a finger on the arc-shaped peripheral portion, it is sufficiently easy. When the cover 6 is detached, the inner plug is passed through the opening 14 formed in the top wall 8 of the shell 4.
26 is exposed, and therefore, by inserting an injection needle or the like into the inner stopper 26, the drug solution contained in the container 23 can be poured out.

<Effects of the Invention> The composite container lid according to the present invention is configured as described above, and the coating body is formed with an arcuate rupture line located radially outward of the opening, and at least the rupture line of the coating body extends. The outer peripheral edge portion is thicker than the breaking line, and the lower surface of the covering body is not adhered to the upper surface of the top wall of the shell in the outer region from the outer peripheral edge of the covering body to at least the breaking line. In the inner annular region that is weakly adhered and surrounds the opening formed in the top wall of the shell, the lower surface of the cover is releasably adhered to the upper surface of the top wall of the shell. Of the above, by breaking the break line easily by breaking the break line by pulling with a finger on the peripheral part formed in the wall thickness where the break line extends, the peripheral part of the covering becomes ring-shaped. Since the fingers can be further pulled through the peripheral portion of the ring-shaped cover, the cover can be easily peeled from the top wall of the shell. As described above, according to the present invention, since the peripheral edge portion of the cover is formed thick, even if the lid has a small diameter, it is possible to easily hang a finger on the peripheral edge portion having a small thickness. It can also be applied to a lid for a container having a caliber.
Moreover, after breaking the breaking line, it is possible to further pull fingers through the peripheral portion of the ring-shaped covering body, so that sufficient peeling force should be applied to the bonding portion between the covering body and the top wall of the shell. Therefore, the coating can be easily peeled off from the top wall of the shell.

[Brief description of drawings]

FIG. 1 is a sectional view showing a preferred specific example of a composite container lid constructed according to the present invention. FIG. 2 is a plan view of a covering body in the composite container lid of FIG. FIG. 3 is a schematic plan view showing a non-bonded or weakly bonded region in the lid of the composite container of FIG. 1. 4 and 5 are schematic plan views showing modified examples of the non-bonded or weakly bonded regions. FIG. 6, FIG. 7, FIG. 8 and FIG. 9 are cross-sectional views for explaining a method for manufacturing the composite container lid of FIG. 10 and 11 are cross-sectional views for explaining a method of attaching the composite container lid of FIG. 1 to the mouth / neck portion of a drug solution container. FIG. 12 is a perspective view for explaining the manner in which the covering body in the lid of the composite container of FIG. 1 is peeled off and separated from the shell. 2 …… Composite container lid 4 …… Metal shell 6 …… Synthetic resin coating 8 …… Shell top wall 10 …… Shell skirt wall 14 …… Shell opening 16 …… Coating break line 18… … Non-bonded or weakly bonded area 20 …… Peelable bonded area 22 …… Adhesive film

Continuation of front page (56) Reference JP-A-59-142949 (JP, A) Actually opened 55-44791 (JP, U) Actually opened 59-69165 (JP, U)

Claims (4)

[Claims] 1. A shell having a top wall having an opening formed in a central portion thereof and a cylindrical skirt wall hanging down from an outer peripheral edge of the top wall, and a shell provided on the top wall of the shell to open the opening. In a composite container lid made of a combination with a synthetic resin cover to be closed; an arcuate break line located radially outside the opening is formed in the cover, and at least the break line of the cover extends. The outer peripheral edge portion is thicker than the breaking line, and the lower surface of the covering body is at the upper surface of the top wall of the shell in the outer region from the outer peripheral edge of the covering body to at least the breaking line. In a non-bonded or weakly bonded state, in the inner annular region surrounding the opening, the lower surface of the covering is releasably bonded to the upper surface of the top wall of the shell. Container lid. 2. The breaking line of the covering is at least 24
The composite container lid according to claim 1, which is formed to extend over an angle range of 0 degree. 3. A cohesive failure type adhesive film is adhered to the upper surface of the top wall of the shell, and the outer peripheral edge of the adhesive film is located radially inward of the breaking line, 3. The composite container lid according to claim 1 or 2, wherein said inner annular region is releasably adhered to the upper surface of said top wall via said adhesive film. 4. The shell is made of metal, the peripheral edge of the top wall of the shell is raised, and the peripheral edge of the top wall is lowered when the shell is attached to the neck of the container. A gap is created between the upper peripheral edge of the top wall and the lower peripheral edge of the cover.
The composite container lid according to any one of items 1 to 3.