JP2008037453A - Resin sealing member for container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin sealing member suitable for vial bottles and excellent in sealability and easy openability. <P>SOLUTION: This sealing member 2 includes a cylindrical section 4 and a top board 5. On the top board 5, a plurality of through holes 7 which extend to the inner peripheral surface of the cylindrical section 4 are formed. An inward protuberance 8 of the cylindrical section 4 is formed at an area overlapping the through hole 7. When the sealing member 2 is manufactured by an injection-molding method, the inward protrusion 8 is formed at a location where an external mold and an internal mold face each other, and therefore, even when the projecting dimension of the inward protrusion 8 is large, the die removal can be performed without troubles. A part of the cylindrical section 4 is formed into a tab 10 which is held between two lines of a thinner section 9, and can be unsealed when the tab 10 is tilted. Although the through holes 7 are formed on the sealing member 2, the vial bottle is sealed with a rubber plug, and therefore, the existence of the through holes 7 does not become an obstacle for the sealing. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a stopper-type sealing device used for sealing (holding in a sealed state) containers (particularly bottles), and more particularly to a sealing device suitable for sealing vials. .

  One type of container is a vial, which is frequently used for packaging and storage of various liquids such as chemicals such as reagents, specimens such as blood, and lotions. As a means for sealing the vial, generally, for example, as described in FIGS. 11 to 13 of Patent Document 1, a lid device including a rubber stopper, an aluminum plate crown, and a resin overcap is used. Used to seal the crown tube by caulking the bottom of the vial flange.

  There are two types of crowns: a type that has a hole so that the contents can be sucked out by piercing a syringe (aspiration needle), and a type that has no hole in the top plate and covers the entire rubber stopper. In some cases, the rubber stopper is removed and the contents are poured out. For this reason, the opening of the crown and the score for tearing (thin wall portion) are often formed on the crown.

  As a problem of this conventional product, a caulking device (capper) is necessary for sealing, the efficiency of sealing is poor, and the point that was scored on the crown that was opened and removed from the vial was sharp An edge appears and is dangerous.

  And the improvement plan of these problems is proposed. For example, in Patent Document 1 described above, the crown is made of resin, and an inward projection that is hooked from below on the flange of the vial is formed at the lower end of the cylindrical portion, and the crown is pressed in the axial direction with a punch (punch). Forcibly fitting) to the vial.

  Further, Patent Document 2 discloses a structure in which an inner stopper and a crown are integrated with a resin, and an inward projection that is hooked from below on a flange of a vial is formed at the lower end of a cylindrical portion of the crown. Furthermore, in Patent Document 3 relating to the invention of the present inventor, in a resin-made stoppered cap in which an inner stopper and a crown body are integrated, a flange portion of a vial bottle is viewed from below in a cylindrical portion of the crown body. It is disclosed that an easy-open method is adopted in which a portion to be caught can be excised by cutting in the circumferential direction.

The inventions related to the applications of the above-mentioned documents are common in that the aluminum plate (metal plate) is eliminated from the sealing means of the vial bottle, and the sealing is performed by forced fitting by a stopper, and particularly, Patent Document 3 Ease of opening is also achieved.
Japanese Utility Model Publication No. 59-55151 microfilm (especially FIGS. 1 to 10) Japanese Utility Model No. 63-134944 microfilm JP 2004-67098 A

  When a resin sealing device having a cylindrical portion and a top plate is used as a stopper, such as a crown for a vial, an inward projection (undercut) is formed on the cylindrical portion. The sealing function improves as the projecting dimension of the inward projection increases. However, in manufacturing by the injection molding method, since the die cutting after the molding must be so-called forced punching using elastic deformation, the problem that the protruding dimension of the inward projection cannot be made too large There is.

  An object of the present invention is to solve this problem.

  The sealing device according to the present invention is made of synthetic resin, a cylindrical portion that surrounds the flange of the bottle mouth (container's mouth portion) from the outside, a top plate integrally formed at the upper end of the cylindrical portion, and the cylinder An inward projection formed on the inner peripheral surface of the shape portion, and when the stopper is plugged, the tubular portion is elastically deformed so that the inward projection is allowed to get over the flange of the bottle mouth. When the protrusion is located on the lower surface portion of the flange, the basic configuration is such that the cylindrical portion cannot be removed from the bottle mouth unless the tubular portion is broken.

  In the first aspect of the invention, the top plate is formed with a non-annular through-hole extending to the inner peripheral surface of the cylindrical portion, while the inward projection is viewed from the axial direction. It is formed in a non-annular state where it overlaps with the through hole, and further, the inward projection is detached from the flange of the bottle mouth at a portion of the cylindrical portion that is separated from the top plate by the through hole. It has the characteristic that the weak part for fracture | rupturing a cylindrical part to the state obtained is formed.

  The invention of claim 2 is a preferred embodiment of the invention of claim 1, wherein a plurality of through holes of the top plate and inward projections of the cylindrical portion are formed so as to jump along the circumferential direction. The two portions of the weakened portion that are separated from each other in the circumferential direction are formed in the portion separated from the top plate by one through hole in the shaped portion, and the portion that is sandwiched between the two sets of the weakened portions of the cylindrical portion Is a tab that can be tilted down by a person with a finger or raised up.

  In manufacturing the sealing tool of the present invention by the injection molding method, an outer mold (commonly called “cavity”) that forms the outer surface of the sealing tool and an inner mold (commonly called “core”) that forms the inner surface are used. Die removal is performed by relatively moving the mold in the axial direction of the inner mold.

  And since the inward protrusion of a cylindrical part is located in the location of the through-hole of a top plate, an inward protrusion is formed with an outer type | mold and an inner type | mold. Therefore, the inward projections are not forcedly removed during die cutting, and as a result, the projecting dimension of the inward projections can be increased without impairing the ease of die cutting. Thereby, the sealing tool which ensured a remarkably high sealing function can be obtained easily.

  In the present invention, since the top plate of the sealing device has a through hole, the sealing device itself may not have a sealing function. However, when a rubber stopper is used like a vial, the sealing function is provided by the rubber stopper. Therefore, there is no problem in use. Conversely, it can be said that the present invention is suitable for a sealing device having a rubber plug such as a vial sealing device. As described above, the contents of the vial are often sucked out by a syringe, but as a countermeasure against this point, a hole for piercing the syringe may be formed at the center of the top plate.

  If comprised like Claim 2, a part of cylindrical part will become a tab, and if this tab is knocked down or raised, a weak part will be torn and the sealing with respect to a bottle mouth will be cancelled | released. For this reason, there exists an advantage which can be opened by one touch.

  Next, an embodiment of the present invention will be described with reference to the drawings.

(1) First Embodiment FIGS. 1 to 5 show a first embodiment. This embodiment is used for a sealing tool for a vial, FIG. 1 is a front view showing separation of the vial and the sealing device, FIG. 2 is a plan view of the sealing tool, and FIG. 2 is a cross-sectional view taken along the line A-B in FIG. 2, FIG. 4 is a partial cross-sectional view taken along the line IV-IV in FIG. 1, and FIG. It is.

  The vial A is well known in the art, and a flange A2 projecting outward is formed at the upper end of the mouth (bottle mouth) A1. The sealing device includes the rubber plug 1 and the sealing tool 2 of the present embodiment as essential elements, and includes an overcap 3 as an optional element. The rubber plug 1 includes a top plate 1a and a cylindrical inner plug 1b.

  The seal of the vial A is secured by the rubber stopper 1, and the sealing tool 2 is responsible for functions of preventing the rubber stopper 1 from coming off and preventing unauthorized opening. The overcap 3 has a protective function for preventing dust from adhering to the upper surface of the sealing tool 2, and includes a top plate 3a and a cylindrical body 3b. Hereinafter, the sealing tool 2 will be described.

  The sealing tool 2 includes a circular cylindrical portion 4 that surrounds the mouth portion A1 of the vial A and a top plate 5 that is integrally provided at the upper end thereof, and a connecting portion between the cylindrical portion 4 and the top plate 5. Is rounded. The top plate 5 has one central hole 6 and three through holes 7 extending to the inner periphery of the cylindrical portion 4. The through holes 7 are spaced at equal intervals along the circumferential direction, and each through hole 7 is formed in the same shape and size.

  The maximum width dimension in the circumferential direction (length dimension in the circumferential direction) of each through hole 7 is about three times the distance between adjacent through holes 7. Of course, the size and shape of the through hole 7 can be arbitrarily set as required. Although the through hole 7 has a shape close to a long and narrow hexagon in plan view, the planar shape and the hole width can be arbitrarily set, for example, the inner periphery is formed in an arc shape.

  Inward projections 8 that hit the flange A2 of the vial A from below are formed on three inner surfaces corresponding to the through holes 7 in the lower end of the cylindrical portion 4. The inward projection 8 has a projecting dimension so that the flange A2 of the vial A can be firmly hooked from below, and the upper surface 8a is formed flat so as to enhance the function of catching the flange A2 of the vial A. The lower surface of the inward projection 8 is an inclined surface for inviting the fitting at the time of plugging. The length of each inward projection 8 in the circumferential direction is set to be smaller than the length of the through hole 7 in the circumferential direction.

  In the portion of the cylindrical portion 4 that is separated from the top plate 5 by one through hole 7, two thin portions 9 separated in the circumferential direction are formed as an example of the weak portion described in the claims. The portion sandwiched between the two thin portions 9 of the cylindrical portion 4 is formed with the opening tab 10. The thin portion 9 is formed in a thin strip shape. The thin-walled portion 9 can be formed as a V-shaped groove. However, if it is formed in a strip shape as in the embodiment, it is easy to stretch in the circumferential direction, so that there is an advantage that it is possible to surely prevent breakage at the time of plugging.

  The upper end of the thin portion 9 is located below the upper end of the tab 10, and a slit 11 that opens upward is formed between the tab 10 and the adjacent cylindrical portion 4. The reason why the slit 11 is formed is that the thin portion 9 can be easily broken by the tab 10 being tilted.

  The inward projection 8 formed on the tab 10 has one end (left end) aligned with one end of the tab 10, but the other end (right end) extends in the circumferential direction beyond the thin portion 9. Therefore, even if both the thin portions 9 are broken, the tab 10 and the other portion of the tubular portion 4 are connected via one inward projection 8. In other words, the tab 10 is not separated even after opening. For this reason, scattering as garbage is suppressed, and it is possible to prevent an infant from putting the tab 10 into the mouth.

  The overcap 3 is set so as to cover the middle part of the upper and lower portions of the sealing tool 2, and a very low inward undercut (projection) 12 is formed on the inner periphery of the overcap 3 to prevent the overcap 3 from coming off. On the other hand, outward undercuts 13 are formed at portions corresponding to the through holes 7 in the tubular portion 4 of the sealing tool 2. The overcap 3 may have a depth that completely covers the sealing tool 2, or may be provided with a finger hook piece 14 as shown by a one-dot chain line in FIG.

  The sealing tool 2 is manufactured by an injection molding method. A part of the mold apparatus for manufacturing is shown by a one-dot chain line in FIG. That is, the mold apparatus is for removing the outer mold 16 having a recess (cavity) covering the sealing tool 2, the inner mold 17 having a portion entering the inside of the sealing tool 2, and the product from the inner mold 17. And an inward block 16 a for forming the through hole 7 is formed in the outer mold 16.

  Since the inward projection 8 is formed in a space sandwiched between the inward block 16a of the outer mold 16 and the inner mold 17, the projecting dimension is increased or the upper surface 8a is formed flat. Die cutting can be done without resistance. For this reason, although it is the sealing tool 2 which has an outstanding sealing function, it can manufacture easily, without causing the problem of die cutting. It is also possible to form the portion of the inward projection 8 excluding the lower surface with the inward block 16 a of the outer mold 16.

  As shown in FIG. 5, when the fingertip is applied to the upper end of the tab 10 and tilted downward, the thin portion 9 is torn and opened. When the sealing tool 2 is removed, the rubber stopper 1 can be removed. In this case, the lower end of the tab 10 is in contact with the lower surface of the flange A2 and the lever acts, and the breaking of the thin-walled portion 9 progresses from top to bottom and stress is concentrated, thereby opening the seal. Easy to do. This is an advantage of the present embodiment. Needless to say, the contents can be sucked out by inserting a syringe from the center hole 6 without opening the package.

(2). Other Embodiments FIG. 6 shows a second embodiment. In this embodiment, the top plate 5 is integrally provided with a middle plug portion 5a that fits into the mouth portion A1 of the container, and a through hole 7 is formed in a portion of the top plate 5 that overlaps the top surface of the mouth portion A1 of the container. Inward projections 8 are formed at portions corresponding to the through holes 7. The through holes 7 and the inward projections 8 are formed at three positions that are equally spaced along the circumferential direction. A portion corresponding to one through hole 7 in the tubular portion 4 is a tab 10 sandwiched between two thin portions.

  In this embodiment, the sealing tool 2 also has a sealing function due to the presence of the inner plug portion 5a. Although the illustrated middle plug portion 5a is recessed upward, it can also be formed as a cylindrical middle plug (middle leg) that opens downward. As indicated by the alternate long and short dash line, as shown by the alternate long and short dash line at the upper end of the tab, it is also possible to integrally provide a finger hooking portion 10 a projecting outward at the upper end of the tab 10.

  FIG. 7 shows a third embodiment in which the opening method is different. (A) is a top view, (B) is a BB view of (A), (C) is a CC view cross-sectional view of (B). In this embodiment, the through holes 7 and the inward projections 8 are formed at four positions spaced at equal intervals along the circumferential direction. And the horizontal tab 19 extended along the outer periphery of the cylindrical part 4 is integrally provided in the lower end part of the cylindrical part 4, and it inclines from the root of the horizontal tab 19 in the cylindrical part 4 as an example of a weak part. A thin-walled portion (V groove) 20 extending in a shape is formed.

  The horizontal tab 19 is connected to the cylindrical portion 4 via one or a plurality of bridges 21. Moreover, the thin part 20 is located in the location between the adjacent through holes 7, and is extended to the upper end of the cylindrical part 4 (it may be made to follow the through hole 7).

In this embodiment, the horizontal tab 19 is pulled to tear the cylindrical portion 4 along the inclined thin portion 20 to open the tube. In this embodiment, the thin-walled portion 20 is forcibly removed from the inner mold. As shown in (B), it is also possible to form the thin part 20 horizontally (in this case, the tip of the thin part 20 extends to the through hole 7).
(3). Others The present invention can be embodied in various ways other than the above embodiment. For example, the through hole and the inward projection can be formed at one place on both sides of the shaft center (theoretically, it can be provided at only one place, but it is possible to secure the hook to the flange of the bottle mouth. In view of the nature, it is preferably provided at a plurality of locations.) It is also possible to adopt a bridge part as the weak part. The relationship between the tab and the fragile portion may be a structure in which the fragile portion is broken by raising the tab upward.

  It is also possible to provide a plurality of inward projections at locations corresponding to one through hole. Furthermore, the inward projection is not necessarily formed at the lower portion of the cylindrical portion, and can be provided in the middle portion between the upper end and the lower end of the cylindrical portion. The use of the sealing device according to the present invention is not limited to vials, and can be applied to various containers.

It is a separation front view of a 1st embodiment. It is a top view of a sealing tool. 2A is a cross-sectional view taken along line AA in FIG. 2, and FIG. 3B is a cross-sectional view taken along line BB in FIG. FIG. 4 is a partial cross-sectional view taken along line IV-IV in FIG. 1. It is principal part sectional drawing in a sealing state. It is a figure which shows 2nd Embodiment. It is a figure which shows 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rubber plug 2 Sealing tool 3 Overcap 4 Cylindrical part 5 Top plate 6 Center hole 7 Through-hole 8 Inward protrusion 9 Thin part as an example of a weak part 10 Tab

Claims (2)

A cylindrical portion that surrounds the flange of the bottle mouth from the outside, a top plate that is integrally formed on the upper end of the cylindrical portion, and an inward projection formed on the inner peripheral surface of the cylindrical portion, Sometimes the cylindrical part is elastically deformed so that the inward projection is allowed to get over the flange of the bottle mouth, and when the inward projection is located on the lower surface portion of the flange, it is removed from the bottle mouth unless the tubular part is broken. It is a synthetic resin sealing tool that can not be,
On the top plate, a through hole extending to the inner peripheral surface of the cylindrical portion is formed in a non-annular state, while the inward projection is non-annular at a position overlapping the through hole when viewed from the axial direction. Furthermore, the tubular portion is broken at a portion of the tubular portion separated from the top plate by the through hole until the inward projection can be detached from the flange of the bottle mouth. A vulnerable part is formed,
Synthetic resin sealing device for containers. A plurality of through holes in the top plate and inward projections of the cylindrical portion are formed in a state of jumping along the circumferential direction, and a portion of the cylindrical portion separated from the top plate by one through hole is formed. The tabs are formed with two sets of weak parts separated in the circumferential direction, and a part that is sandwiched between the two sets of weak parts of the cylindrical part can be tilted downward with a finger or raised upward by a person. Made
A synthetic resin sealing device for containers according to claim 1.

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