JPH08175554A - Rubber stopper, and manufacture thereof - Google Patents
Rubber stopper, and manufacture thereofInfo
- Publication number
- JPH08175554A JPH08175554A JP6319705A JP31970594A JPH08175554A JP H08175554 A JPH08175554 A JP H08175554A JP 6319705 A JP6319705 A JP 6319705A JP 31970594 A JP31970594 A JP 31970594A JP H08175554 A JPH08175554 A JP H08175554A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- bottle mouth
- brim
- film
- leg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Closures For Containers (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は例えば薬液封入用のバイ
アル瓶などを封印するゴム栓に関し,薬液への影響を与
えないように,フィルムなどで表面をラミネートしたゴ
ム栓に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber stopper for sealing, for example, a vial for sealing a chemical solution, and more particularly to a rubber stopper having a surface laminated with a film or the like so as not to affect the chemical solution.
【0002】[0002]
【従来の技術】従来から,薬液封入用のバイアル瓶に用
いられるゴム栓としては,ブチルゴムを用いたものが良
く知られている。しかし,ブチルゴムの加硫促進剤や硬
化剤などの溶出物の防止のために,フィルムをラミネー
トするものとして,特公平2−40491号公報或いは
実開平58−29939号公報に開示されたものがあ
る。2. Description of the Related Art Conventionally, as a rubber stopper used in a vial for filling a chemical solution, one using butyl rubber is well known. However, as a method of laminating a film to prevent elution of vulcanization accelerators and curing agents of butyl rubber, there are those disclosed in Japanese Examined Patent Publication No. 2-40491 or Japanese Utility Model Laid-Open No. 58-29939. .
【0003】特公平2−40491号は,昭和57年6
月30日に出願されたもので,医薬用積層ゴム栓及びそ
の製造方法に関するものである。この特許公報には,脚
部とフランジ部とからなるゴム栓本体の脚部全面とフラ
ンジ部下面とをテトラフルオロエチレンとエチレンを主
成分とするコポリマーフィルムで覆い,ゴム栓の素材
は,ブチルゴム,エチレンプロピレンターポリマー,エ
ピクロルヒドリンゴム,イソプレンゴム,ブタジェンゴ
ム,スチレンブタジェンゴムの単体または複合体を架橋
ゴム素材で構成されている。このゴム栓の形状は,脚部
の直径をd,フランジ下面から脚部の長さをlとすると
きに,l/dの比率が0.1〜1.0の範囲に設定さ
れ,異形状のゴム栓であることが特徴とされている。こ
のl/dの比率は,周知のものであり,国際標準機関,
イギリス工業規格,ドイツ工業規格を参考にしたもので
あるが,TEF・Eフィルムを用いることによって成形
できるとする。Japanese Examined Patent Publication No. 2-40491 was issued on June 6, 1982.
The present invention was filed on March 30, and relates to a laminated rubber stopper for medical use and a manufacturing method thereof. In this patent publication, the entire surface of the leg of the rubber stopper body consisting of the leg and the flange and the lower surface of the flange are covered with a copolymer film containing tetrafluoroethylene and ethylene as main components, and the material of the rubber stopper is butyl rubber, It is composed of ethylene propylene terpolymer, epichlorohydrin rubber, isoprene rubber, butadiene rubber, and styrene butadiene rubber alone or as a composite with a crosslinked rubber material. The shape of this rubber plug is set to have a ratio of 1 / d in the range of 0.1 to 1.0 when the diameter of the leg is d and the length of the leg from the bottom surface of the flange is l. It is characterized by the rubber stopper. This l / d ratio is well known and is
Although it is based on the British and German industrial standards, it can be formed by using TEF / E film.
【0004】特開平58−29939号は,昭和56年
8月24日に出願され,昭和58年2月26日に公開さ
れたもので,ゴム栓本体の容器口上端部との接触面の外
周部を除く脚部全体が樹脂で積層され,接触面外周部の
ゴム面に1の突状または溝状のリングが形成され,リン
グの内側部分が樹脂で被覆されている。Japanese Patent Application Laid-Open No. 58-29939 was filed on August 24, 1981, and was published on February 26, 1983, and the outer circumference of the contact surface of the rubber stopper body with the upper end of the container mouth. The entire leg portion except the portion is laminated with resin, one protruding or groove ring is formed on the rubber surface of the outer peripheral portion of the contact surface, and the inner portion of the ring is covered with resin.
【0005】なお,ゴム栓を樹脂フィルムで覆うという
思想は,特公昭52−1355号,特公昭54−911
9号等の開示されており,提案されている樹脂には,T
FE,PCTFE,PE,PP,PVDF等がある。The idea of covering a rubber plug with a resin film is described in Japanese Examined Patent Publication Nos. 52-1355 and 54-911.
The disclosed and proposed resins such as No. 9 include T
There are FE, PCTFE, PE, PP, PVDF and the like.
【0006】[0006]
【発明が解決しようとする課題】しかし,フィルムをラ
ミネートした脚部とフランジ部とを半加硫状態で別々に
製造し,その後両者を再度二次成形用の金型にいれて完
全に結合させる場合,様々な汚れが脚部の上面部に残
る。例えば,一次成形において形成したゴムシートから
脚部を打ち抜くときに,あるいは加硫されたゴムシート
を搬送する際,又はカッターでカットするとき,さらに
はエアーで吸引して整列機に搭載するとき,また整列機
から二次工程用の下金型に素体をセットするとき等の工
程において,機械の製造油,離型剤あるいは作業者の手
の汚れ,作業場所の粉塵等がそれである。これら脚部の
上面部に付着している汚れは洗浄しなければならない。However, the film-laminated leg portion and the flange portion are separately manufactured in a semi-vulcanized state, and then the both are again put in a mold for secondary molding to be completely bonded. In this case, various stains remain on the upper surface of the leg. For example, when punching out the leg from the rubber sheet formed in the primary molding, when conveying a vulcanized rubber sheet, when cutting with a cutter, when sucking with air and mounting it on the aligner, Further, in the process of setting the element body from the aligning machine to the lower die for the secondary process, the manufacturing oil of the machine, the release agent or the stain of the operator's hand, the dust in the work place, etc. Dirt adhering to the upper surface of these legs must be cleaned.
【0007】しかし,脚部の上面部の汚れはなかなか取
れにくい。このため,洗浄が不完全状態のまま脚部とフ
ランジの天面部とが結合されると,天面部から差し込ん
だ針先がこの結合部分の汚れにより汚染される懸念があ
る。また,脚部の表面に樹脂フィルムを接着したゴム栓
の場合,樹脂フィルムの端部とゴムとの間に隙間ができ
易く,この隙間に洗浄液が滞留する問題がある。However, it is difficult to remove the dirt from the upper surface of the leg. Therefore, if the legs and the top surface of the flange are joined together while the cleaning is incomplete, the tip of the needle inserted from the top surface may be contaminated by dirt on the joined portion. Further, in the case of a rubber plug having a resin film adhered to the surface of the leg portion, a gap is easily formed between the end portion of the resin film and the rubber, and there is a problem that the cleaning liquid stays in this gap.
【0008】また,ゴム栓の下面に樹脂フィルムを貼着
する場合,テトラフルオロエチレン(TFE)は不活性
であるのでブチルゴムと容易に貼着されない。このた
め,カップリング剤をブチルゴムに配合してTFEとブ
チルゴムとを結合させているが,結合力が十分でない。Further, when a resin film is attached to the lower surface of the rubber stopper, tetrafluoroethylene (TFE) is inactive, so that it is not easily attached to butyl rubber. Therefore, a coupling agent is blended with butyl rubber to bond TFE and butyl rubber, but the bonding strength is not sufficient.
【0009】加硫済みのゴムシートには多数のゴム栓素
体が形成されるので,これらはポンチで打ち抜いて取り
出すのであるが,ブチルゴムとTFEとの結合力が弱い
ことと,ポンチの刃のせん断力によりTFEの端部にお
いてゴムとの剥離が生じ易い。Since a large number of rubber plugs are formed on the vulcanized rubber sheet, they are punched out and taken out. However, the bonding force between butyl rubber and TFE is weak, and the punch blade Peeling from the rubber easily occurs at the end of TFE due to the shearing force.
【0010】このTFEの端部に剥離が生ずると,TF
Eとゴムとの隙間に進入したゴム栓の洗浄液が表面張力
などでなかなか流出しないという問題がある。When peeling occurs at the end of this TFE, TF
There is a problem that the cleaning liquid for the rubber plug that has entered the gap between E and the rubber does not easily flow out due to surface tension.
【0011】実開昭58−29939号では,フランジ
の接触面においてラミネート樹脂の終端部がリング状の
凹部または凸部の内側にあるが,ラミネートの終端部を
いかなる方法でフランジの接触面の中間部で止めるので
あるかは開示されていない。In Japanese Utility Model Laid-Open No. 58-29939, the end portion of the laminate resin is inside the ring-shaped concave or convex portion on the contact surface of the flange, but the end portion of the laminate is in the middle of the contact surface of the flange by any method. It is not disclosed whether to stop in part.
【0012】また,フランジの接触面及び脚部の全面を
樹脂フィルムで覆うと,ゴムとガラスとの密着に較べて
密封性が低下するという問題がある。Further, if the contact surface of the flange and the entire surface of the leg portion are covered with a resin film, there is a problem that the sealing performance is deteriorated as compared with the close contact between rubber and glass.
【0013】本発明にかかるゴム栓は,このような事態
に鑑みて創作されたものであり,様々な汚れが脚部の天
面部やフィルムの隙間に残らず,天面部のバージン性を
確保する事により針先の汚染がなく,ゴムと薬液の接触
を回避して薬液の変質を防止し,さらに密封性が高く,
さらに金型や加工工程が少なく量産に有利なゴム栓を提
供することを目的とする。The rubber plug according to the present invention was created in view of such a situation, and various stains do not remain on the top surface of the leg or the gap between the films, and the virgin property of the top surface is secured. By doing so, there is no contamination of the needle tip, avoiding contact between rubber and chemical liquid, preventing alteration of chemical liquid, and high sealing performance.
Another object of the present invention is to provide a rubber stopper which has few molds and processing steps and is advantageous for mass production.
【0014】[0014]
【課題を解決するための手段】上記課題を解決するため
に,本発明の請求項1のゴム栓は,瓶口の上端面に当接
するツバ部と,このツバ部の下面から突出して瓶口の内
部に圧入される脚部とからなるゴム栓であって,前記ツ
バ部の側部周面と,前記瓶口の上端面に接触する瓶口接
触面とで形成される角部が面取りされており,前記ツバ
部の天面部から側部周面さらに面取り済みの角部にかけ
て薬液に不活性な第1フィルム層が形成され,前記ツバ
部の瓶口接触面に前記脚部の根元を取り囲む環状の凹部
が形成され,この凹部の内壁面と前記脚部の表面とにか
けて前記薬液に不活性な第2フィルム層が形成され,前
記第1フィルム層の終端部と前記第2フィルム層の終端
部との間に位置する瓶口接触面にゴム面が露出すること
を特徴とする。In order to solve the above-mentioned problems, the rubber stopper according to claim 1 of the present invention has a brim portion that abuts on the upper end surface of the bottle mouth and a bottle mouth that projects from the lower surface of the brim portion. Is a rubber plug comprising a leg portion press-fitted inside, and a chamfered corner formed by a side peripheral surface of the brim portion and a bottle mouth contact surface contacting an upper end surface of the bottle mouth. The first film layer that is inactive to the chemical is formed from the top surface of the brim to the side peripheral surface and the chamfered corner, and surrounds the root of the leg on the bottle mouth contact surface of the brim. An annular recess is formed, a second film layer inactive to the chemical is formed between the inner wall surface of the recess and the surface of the leg, and the end portion of the first film layer and the end portion of the second film layer are formed. It is characterized in that a rubber surface is exposed at a bottle mouth contact surface located between the portion and the portion.
【0015】また,本発明の請求項2のゴム栓は,瓶口
の上端面に当接するツバ部と,このツバ部の下面から突
出して瓶口の内部に圧入される脚部とからなるゴム栓で
あって,前記ツバ部の側部周面と,前記瓶口の上端面に
接触する瓶口接触面とで形成される角部が面取りされて
おり,前記ツバ部の天面部から側部周面さらに面取り済
みの角部にかけて薬液に不活性な第1コート層が形成さ
れ,前記ツバ部の瓶口接触面に前記脚部の根元を取り囲
む環状の凹部が形成され,この凹部の内壁面と前記脚部
の表面とにかけて前記薬液に不活性な第2コート層が形
成され,前記第1コート層の終端部と前記第2コート層
の終端部との間に位置する瓶口接触面にゴム面が露出す
ることを特徴とする。The rubber stopper according to claim 2 of the present invention is a rubber comprising a brim portion that abuts on the upper end surface of the bottle mouth, and a leg portion that projects from the lower surface of the brim portion and is press-fitted into the bottle mouth. The stopper is chamfered at a corner portion formed by a side peripheral surface of the brim portion and a bottle mouth contact surface which comes into contact with an upper end surface of the bottle mouth, and a side portion from a top surface portion of the brim portion. The first coat layer which is inert to the chemical is formed over the peripheral surface and the chamfered corner, and an annular recess surrounding the root of the leg is formed on the bottle mouth contact surface of the brim, and the inner wall surface of this recess A second coat layer that is inert to the chemical solution is formed between the end of the first coat layer and the end of the second coat layer, and the bottle mouth contact surface is located between the end of the first coat layer and the end of the second coat layer. The feature is that the rubber surface is exposed.
【0016】本発明の請求項3のゴム栓は,請求項1の
ゴム栓であって,前記凹部にシールリングを備えている
ことを特徴とする。A rubber stopper according to a third aspect of the present invention is the rubber stopper according to the first aspect, characterized in that the recess is provided with a seal ring.
【0017】本発明のゴム栓の製造方法は,脚部形成用
の凹部を有する下金型に封入薬液に不活性な第1フィル
ムを敷設し,この第1フィルムの上に未加硫ゴムシート
を敷設し,この未加硫ゴムシートの上に封入薬液に不活
性な第2フィルムを敷設し,この第2フィルムの上方に
前記脚部形成用の凹部に対向してツバ部形成用の凹部を
有する上金型を配設し,前記上金型と下金型とを加熱加
圧してゴム栓素体の多数形成シートを形成し,このゴム
栓素体の多数形成シートを打ち抜いてゴム栓を得るゴム
栓の製造方法であって,前記下金型に,前記ツバ部の外
径相当大の凹部を形成すると共に,この凹部の周縁を面
取りし,この凹部の中心部位に脚部用凹部を形成し,こ
の脚部用凹部の周りにこの脚部用凹部を取り囲むリング
状の凸部を形成したものを用い,前記ゴム栓素体の多数
形成シートの打ち抜き工程後,前記リング状の凸部によ
りゴム栓素体の瓶口接触面に形成されたリング凹部に,
このリング凹部と同大の筒状部材を進入させると共に,
この筒状部材と前記ツバ部の天面部を支える部材とによ
り前記ゴム栓素体を保持し,前記リング凹部の底部より
浅い位置であって,前記ツバ部の側面部の面取り角部の
途中から前記筒状部材の先端部にめがけて水平に切断を
行うことにより,前記面取り角部と前記リング凹部との
間にゴム面を露呈させることを特徴とする。According to the method for producing a rubber stopper of the present invention, a first film inert to the encapsulating liquid chemical is laid in a lower mold having recesses for forming legs, and an unvulcanized rubber sheet is placed on the first film. And laying on the unvulcanized rubber sheet a second film which is inert to the encapsulating chemical, and facing the concave portion for forming the leg portion above the second film, a concave portion for forming the brim portion. An upper mold having a plurality of sheets is formed, and the upper mold and the lower mold are heated and pressed to form a multi-formed sheet of a rubber plug element, and the multi-formed sheet of the rubber plug element is punched out to form a rubber plug. A method of manufacturing a rubber plug, wherein a recess having a diameter corresponding to the outer diameter of the flange is formed in the lower mold, and the periphery of the recess is chamfered, and a leg recess is formed at the center of the recess. And a ring-shaped convex portion surrounding the leg concave portion is formed around the leg concave portion. Using things, after punching step of a number forming sheet of the rubber Senmototai, the ring recess formed in the bottle mouth contact surface of the rubber Senmototai by the ring-shaped convex portion,
While inserting a cylindrical member of the same size as this ring recess,
The rubber plug element is held by the tubular member and the member that supports the top surface of the brim, and is located at a position shallower than the bottom of the ring recess and from the middle of the chamfered corner of the side of the brim. It is characterized in that a rubber surface is exposed between the chamfered corner portion and the ring recessed portion by horizontally cutting the tip end portion of the tubular member.
【0018】[0018]
【作 用】請求項1のゴム栓によれば,一回の成形で脚
部とツバ部とを成形できるので,様々な汚れを内部に封
じ込めるおそれがなく,ゴムのバージン性を確保するの
で,針先の汚染がない。また,ツバ部の天面部が第1フ
ィルム層により覆われているので,汚れが付いても第1
フィルム層により簡単に洗浄出来るので,汚れが残るこ
とがない。[Operation] According to the rubber plug of claim 1, since the leg portion and the brim portion can be formed by one-time molding, there is no possibility of enclosing various dirts inside, and the virgin property of the rubber is secured. No contamination of the needle tip. Moreover, since the top surface of the brim is covered with the first film layer, even if it gets dirty,
Since it can be easily washed with the film layer, no dirt remains.
【0019】また,ツバ部と瓶口接触面との角部が面取
りされ,ツバ部の天面部から角部を含んで瓶口接触面の
端部に至るまで第1フィルム層で覆われ,第1フィルム
層の終端部が面取り角部においてツバ部側面部よりもす
ぼんだ形状になるので,第1フィルム層の終端部がゴム
から剥離し難い。Further, the corner portion between the brim portion and the bottle mouth contact surface is chamfered, and the first film layer covers from the top surface portion of the brim portion to the end of the bottle mouth contact surface including the corner portion. Since the end portion of the first film layer has a shape that is narrower than the side surface of the brim portion at the chamfered corner portion, it is difficult for the end portion of the first film layer to peel off from the rubber.
【0020】さらに,第2フィルム層の終端部が瓶口接
触面のリング状凹部の内壁面を覆っており,筒状に丸め
られた状態になるので,強度が向上すると共に,リング
状凹部内部にあるので剥離しにくい。Furthermore, since the end portion of the second film layer covers the inner wall surface of the ring-shaped recess on the bottle mouth contact surface and is rolled into a tubular shape, the strength is improved and the inside of the ring-shaped recess is improved. It is hard to peel off because it is in.
【0021】このように,フィルムの隙間に洗浄液が残
らない。また脚部表面の第2フィルム層によりゴムと薬
液の接触が回避されて薬液の変質が防止され,さらに密
封性が高く,さらに金型や加工工程が少なく量産に有利
である。In this way, no cleaning liquid remains in the film gap. Further, the second film layer on the surface of the leg portion prevents contact between the rubber and the chemical liquid to prevent the chemical liquid from deteriorating, has a high sealing property, and is advantageous in mass production because of less molds and processing steps.
【0022】瓶口接触面において第1フィルム層の終端
部と第2フィルム層の終端部との間,すなわち,リング
状凹部と面取り角部との間にゴム面が露呈し,リング状
凹部が形成されているため,アルミ金属などで瓶口にか
しめる力が脚部側に分散しにくいので,しっかりと瓶口
接触面が瓶口に密着する。従って,ガラスなどの瓶口上
端部と密着して封止機能が向上する。At the bottle mouth contact surface, the rubber surface is exposed between the end portion of the first film layer and the end portion of the second film layer, that is, between the ring-shaped recess and the chamfered corner, and the ring-shaped recess is formed. Since it is formed, the caulking force with the aluminum metal etc. is difficult to disperse to the leg side, so the bottle mouth contact surface firmly adheres to the bottle mouth. Therefore, the sealing function is improved by making close contact with the upper end of the bottle mouth such as glass.
【0023】請求項2のゴム栓によれば,フィルムに代
えてコート層でゴム面を覆うので,フィルムで覆ったゴ
ム栓と同様な効果を得られる。According to the rubber stopper of the second aspect, since the rubber surface is covered with the coat layer instead of the film, the same effect as the rubber stopper covered with the film can be obtained.
【0024】請求項3のゴム栓によれば,リング状凹部
内にシールリングが設けられるので,第2フィルム層の
終端部がよりいっそう剥離し難くなると共に,瓶口上端
面の密封性がさらに向上する。According to the rubber plug of the third aspect, since the seal ring is provided in the ring-shaped recess, the end portion of the second film layer is more difficult to peel off and the sealing property of the upper end surface of the bottle mouth is further improved. To do.
【0025】請求項4のゴム栓の製造方法によれば,リ
ング状凹部の底を筒状部材で保持しているから,ツバ部
の面取り角部の途中から瓶口接触面の凹部の底部近傍に
向かって水平に切断しても,第1フィルム層とゴムと第
2フィルム層とを確実に切ることができ,第1,第2フ
ィルム層の終端部の剥離が生じない。また,瓶口接触面
の脚部側が第2フィルム層で覆われ,ツバ部の天面部及
び側面部並びに角部が第1フィルム層で覆われる一方,
角部とリング状凹部との間にゴムが露呈するので密封性
が向上する。特に,リング状凹部が形成されているた
め,アルミ金属などで瓶口にかしめる力が脚部側に分散
しにくいので,しっかりと瓶口接触面が瓶口に密着す
る。従って,ガラスなどの瓶口上端部と密着して封止機
能が向上する。According to the method of manufacturing the rubber stopper of the fourth aspect, since the bottom of the ring-shaped recess is held by the tubular member, the vicinity of the bottom of the recess on the bottle mouth contact surface is reached from the middle of the chamfered corner of the brim. The first film layer, the rubber, and the second film layer can be reliably cut even when cut horizontally toward, and the end portions of the first and second film layers are not peeled off. In addition, the leg side of the bottle mouth contact surface is covered with the second film layer, and the top and side surfaces of the brim and the corners are covered with the first film layer,
Since the rubber is exposed between the corner and the ring-shaped recess, the sealing performance is improved. In particular, since the ring-shaped recess is formed, the force of caulking the bottle mouth with aluminum metal or the like is difficult to distribute to the leg side, so the bottle mouth contact surface firmly adheres to the bottle mouth. Therefore, the sealing function is improved by making close contact with the upper end of the bottle mouth such as glass.
【0026】さらに,ツバ部と脚部とを一体成形し,ゴ
ム栓素体の角部の途中からリング状凹部の底部までの部
分を水平にカットするから,注射針の汚染防止用ラミネ
ートフィルムの位置がフランジ中間できちんと止めてお
くことができる。リング状凹部と脚部との間は,第2フ
ィルム層で覆われているから,薬液がゴムと接触する部
分がない。このような安全な医薬用のラミネート式ゴム
栓を量産できる。Further, since the brim portion and the leg portion are integrally formed, and the portion from the middle of the corner portion of the rubber stopper body to the bottom portion of the ring-shaped recess is cut horizontally, the laminated film for preventing contamination of the injection needle is formed. The position can be stopped properly at the middle of the flange. Since the second film layer covers between the ring-shaped concave portion and the leg portion, there is no portion where the chemical solution contacts the rubber. Such a safe laminated rubber stopper for medical use can be mass-produced.
【0027】従来の医薬用ラミネートゴム栓を生産する
には,一次成形用の上金型及び下金型並びに二次成形用
の上金型及び下金型とを必要とし,さらにゴム成形機も
2機必要であったが,本発明によれば一次成形用の金型
ですむため,従来より簡単且つ手間がかからず,製造コ
ストが低廉化でき,量産の効率が良い。In order to produce a conventional laminated rubber stopper for medicine, an upper mold and a lower mold for primary molding and an upper mold and a lower mold for secondary molding are required, and a rubber molding machine is also used. Although two machines were required, according to the present invention, since a mold for primary molding is required, it is simpler and less labor intensive than before, the manufacturing cost can be reduced, and the mass production efficiency is good.
【0028】[0028]
【実施例】以下、本発明の実施例にかかるゴム栓及びゴ
ム栓の製造方法を図面に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rubber stopper and a method for manufacturing a rubber stopper according to an embodiment of the present invention will be described below with reference to the drawings.
【0029】図1は本発明の実施例のゴム栓の断面構成
を示したものであり,符号1はゴム栓全体を指してい
る。このゴム栓1は,ツバ部2と脚部3とを有する。こ
の実施例において,ツバ部2及び脚部3はブチルゴムを
主成分として形成されている。このゴム栓を構成するゴ
ムは,バイエルジャパン株式会社製クロロブチルゴム1
066を100部,日本シリカ製のホワイトカーボンを
30部,亜鉛華を3部,酸化マグネシウム5部,酸化チ
タン3部,ステアリン酸1部,オルガノシラン0.5
部,ACポリエチレン2部,ジペンタメチレンチウラム
テトラサルファイド1.5部の配合成分からなる。加硫
温度は160°C〜180°Cであり,加硫時間は5分
〜8分である。なお,そのほかのゴムとしては,例え
ば,クロロブチル1066が100部,焼成クレイが9
0部,ACポリエチレン617Aが2部,ステアリン酸
が1部,亜鉛華5部,ZnEDCまたはZnBDCを
0.5部とされており,シランカップリング剤(東レ・
ダウコーニング・シリコーン株式会社製)を入れる。加
硫条件は380°cで5分で行うと,ショア硬さAが4
1,100%引張応力が11Kg/cm2,引張強さが
96Kg/cm2,伸び率は780%となる。FIG. 1 shows a cross-sectional structure of a rubber plug according to an embodiment of the present invention, and reference numeral 1 indicates the entire rubber plug. This rubber stopper 1 has a brim portion 2 and a leg portion 3. In this embodiment, the brim portion 2 and the leg portion 3 are formed mainly of butyl rubber. The rubber that constitutes this rubber stopper is chlorobutyl rubber 1 manufactured by Bayer Japan Ltd.
066 100 parts, Nippon Silica white carbon 30 parts, zinc white 3 parts, magnesium oxide 5 parts, titanium oxide 3 parts, stearic acid 1 part, organosilane 0.5.
Part, AC polyethylene 2 parts, and dipentamethylene thiuram tetrasulfide 1.5 parts. The vulcanization temperature is 160 ° C to 180 ° C, and the vulcanization time is 5 minutes to 8 minutes. Other rubbers include, for example, 100 parts of chlorobutyl 1066 and 9 parts of calcined clay.
0 parts, AC polyethylene 617A 2 parts, stearic acid 1 part, zinc white 5 parts, ZnEDC or ZnBDC 0.5 parts, silane coupling agent (Toray
Dow Corning Silicone Co., Ltd.). When the vulcanization conditions are 380 ° C and 5 minutes, the Shore hardness A is 4
1,100% tensile stress is 11 Kg / cm 2 , tensile strength is 96 Kg / cm 2 , and elongation is 780%.
【0030】ツバ部2の側部周面2aと天面部2bはフ
ィルム4で覆われている。フィルム4は側部周面2aと
天面部2bに固着され,第1フィルム層を構成してい
る。脚部3の表面も同様にフィルム5で覆われている。
フィルム5は脚部3のゴム剤と固着されており,第2フ
ィルム層を形成している。The side peripheral surface 2a and the top surface portion 2b of the brim portion 2 are covered with a film 4. The film 4 is fixed to the side peripheral surface 2a and the top surface portion 2b to form a first film layer. The surface of the leg portion 3 is also covered with the film 5.
The film 5 is fixed to the rubber agent of the leg portion 3 and forms a second film layer.
【0031】第1フィルム層及び第2フィルム層を形成
するフィルム4,5のシートとしては,テトラフルオロ
エチレンとエチレンの共重合体であり,薬液に不活性で
ある。このテトラフルオロエチレンとエチレンとの共重
合体としては,例えば旭硝子株式会社製の商品名「アフ
レックス」を用いる。このテトラフルオロエチレンとエ
チレンとの共重合体は,前述のシランカップリング剤が
ゴム材質の中に配合されているので,ゴム栓の表面と結
合し易く,十分に固着する。The sheets of the films 4 and 5 forming the first film layer and the second film layer are copolymers of tetrafluoroethylene and ethylene and are inert to the chemical liquid. As the copolymer of tetrafluoroethylene and ethylene, for example, the trade name "Aflex" manufactured by Asahi Glass Co., Ltd. is used. Since the copolymer of tetrafluoroethylene and ethylene contains the above-mentioned silane coupling agent in the rubber material, it is easily bonded to the surface of the rubber stopper and sufficiently fixed.
【0032】ツバ部2の側部周面2aと,瓶口の上端面
に接触する瓶口接触面2cとで形成される角部2dは面
取りされており,この面取りされた角部2dはフィルム
4で覆われている。角部2dとフィルム4の終端部とは
後述する製造方法により隙間なく固着されている。ツバ
部2の瓶口接触面2cには,脚部3の周りを取り囲むリ
ング状凹部6が形成されている。このリング状凹部6の
形成位置は瓶口の内径部分より半径方向外側に位置して
おり,脚部3の外周面のうちもっとも膨らんだ部位の投
影位置よりわずかに外側に位置する位置に形成されてい
る。このリング状凹部6の断面は,この実施例では矩形
の四角い断面で形成されている。リング状凹部6の内壁
面はフィルム5で覆われている。The corner portion 2d formed by the side peripheral surface 2a of the brim portion 2 and the bottle mouth contact surface 2c that contacts the upper end surface of the bottle mouth is chamfered, and the chamfered corner portion 2d is a film. Covered with 4. The corner portion 2d and the end portion of the film 4 are fixed to each other without a gap by a manufacturing method described later. On the bottle mouth contact surface 2c of the brim portion 2, a ring-shaped recess 6 that surrounds the leg portion 3 is formed. The ring-shaped recess 6 is formed at a position radially outward of the inner diameter portion of the bottle mouth, and slightly outside the projected position of the most bulged portion of the outer peripheral surface of the leg 3. ing. The ring-shaped recess 6 has a rectangular cross section in this embodiment. The inner wall surface of the ring-shaped recess 6 is covered with the film 5.
【0033】このリング状凹部6には,円形断面のシー
ルリング7が保持されている。シールリング7はたとえ
ばシリコンゴム,ブチルゴム,ウレタンゴム,ブタジェ
ンゴム,ポリエチレン,テトラフルオロエチレン,テト
ラフルオロエチレン・エチレンコポリマー等の素材特に
弾性率が高く柔らかいものを用いる。A seal ring 7 having a circular cross section is held in the ring-shaped recess 6. The seal ring 7 is made of a material such as silicone rubber, butyl rubber, urethane rubber, butadiene rubber, polyethylene, tetrafluoroethylene, or tetrafluoroethylene / ethylene copolymer, which has a particularly high elastic modulus and is soft.
【0034】角部2dとリング状凹部6との間の瓶口接
触面2cはゴム面が露出しており,瓶との密着性が向上
している。The rubber surface of the bottle mouth contact surface 2c between the corner 2d and the ring-shaped recess 6 is exposed, and the adhesion with the bottle is improved.
【0035】このゴム栓1によれば,フィルム4,5の
ラミネートによりゴムと薬液との接触が防止されるとと
もに,フィルム4,5終端部においてゴムとフィルム
4,5の剥離を生じさせず,且つ,瓶の密封性を向上さ
せることができる。例えば,ゴム栓1では,ツバ部2と
瓶口接触面2cとの角部2dが面取りされ,ツバ部2の
天面部から角部2dを含んで瓶口接触面2cの端部に至
るまでフィルム4で覆われ,フィルム4の終端部が面取
り角部2dにおいてツバ部側面部よりもすぼんだ形状に
なるので,フィルム4の終端部が角部2dのゴムから剥
離し難い。According to this rubber stopper 1, the lamination of the films 4 and 5 prevents contact between the rubber and the chemical liquid, and does not cause peeling of the rubber and the films 4 and 5 at the end portions of the films 4 and 5. In addition, the tightness of the bottle can be improved. For example, in the rubber stopper 1, a corner 2d between the brim 2 and the bottle mouth contact surface 2c is chamfered, and a film is formed from the top surface of the brim 2 to the end of the bottle mouth contact surface 2c including the corner 2d. Since the end portion of the film 4 is covered with the groove 4 and has a recessed shape in the chamfered corner portion 2d more than the side surface portion of the brim portion, the end portion of the film 4 is difficult to be peeled from the rubber of the corner portion 2d.
【0036】また,フィルム5の終端部が瓶口接触面2
cのリング状凹部6の内壁面を覆っており,筒状に丸め
られた状態になるので,フィルム5の終端部の強度が向
上すると共に,リング状凹部6の内部にあるので外力を
受け難く剥離しにくい。瓶口接触面2cにおいてフィル
ム4の終端部とフィルム5の終端部との間,リング状凹
部6と面取り角部2dとの間にゴム面が露呈しており,
さらに,リング状凹部6が形成されているため,図5に
示すように,アルミ金属8などで瓶口にかしめる力が脚
部側に分散しにくいので,しっかりと瓶口接触面2cが
瓶口9に密着する。従って,ガラスなどの瓶口上端部と
密着して封止機能が向上する。The end of the film 5 is the bottle mouth contact surface 2
Since it covers the inner wall surface of the ring-shaped recess 6 of c and is rolled into a tubular shape, the strength of the end portion of the film 5 is improved, and since it is inside the ring-shaped recess 6, it is difficult to receive an external force. Hard to peel off. At the bottle mouth contact surface 2c, a rubber surface is exposed between the end of the film 4 and the end of the film 5, and between the ring-shaped recess 6 and the chamfered corner 2d.
Furthermore, since the ring-shaped recess 6 is formed, as shown in FIG. 5, the caulking force with the aluminum metal 8 or the like is difficult to disperse on the leg side, so that the bottle mouth contact surface 2c is firmly attached. Stick to mouth 9. Therefore, the sealing function is improved by making close contact with the upper end of the bottle mouth such as glass.
【0037】なお,上記実施例では,フィルム4,5を
用いたが,塗布等の手段でフッ素ゴムなどの不活性樹脂
を塗布してコート層としても同様な効果を得ることがで
きる。Although the films 4 and 5 are used in the above embodiment, the same effect can be obtained by applying an inert resin such as fluororubber as a coat layer by means of coating or the like.
【0038】次に,本発明の実施例のゴム栓の製造方法
について説明する。Next, a method for manufacturing the rubber stopper according to the embodiment of the present invention will be described.
【0039】図2〜図4は本実施例のゴム栓の製造方法
を示したものであり,10は下金型,11は上金型であ
る。このゴム栓の製造方法は,先ず脚部形成用の凹部1
2を有する下金型10に封入薬液に不活性な第1フィル
ムシート13を敷設し,この第1フィルムシート13の
上に未加硫ゴムシート14を敷設し,この未加硫ゴムシ
ート14の上に封入薬液に不活性な第2フィルムシート
15を敷設する。2 to 4 show a method for manufacturing the rubber plug of this embodiment, in which 10 is a lower mold and 11 is an upper mold. The method of manufacturing this rubber plug is as follows. First, the recess 1 for forming the leg is formed.
The first film sheet 13 inert to the encapsulating chemical is laid on the lower mold 10 having 2, and the unvulcanized rubber sheet 14 is laid on the first film sheet 13 and the unvulcanized rubber sheet 14 A second film sheet 15 which is inert to the enclosed drug solution is laid on top.
【0040】未加硫ゴムシート14の素材としては,こ
の実施例ではブチルゴムを主成分として形成されてい
る。実施例のゴムは,バイエルジャパン株式会社製クロ
ロブチルゴム1066を100部,日本シリカ製のホワ
イトカーボンを30部,亜鉛華を3部,酸化マグネシウ
ム5部,酸化チタン3部,ステアリン酸1部,オルガノ
シラン0.5部,ACポリエチレン2部,ジペンタメチ
レンチウラムテトラサルファイド1.5部の配合からな
る。この加硫温度は160°C〜180°Cであり,加
硫時間は5〜8分分である。なお,その他の実験例で
は,このゴム栓を構成するゴムは,クロロブチル106
6が100部,焼成クレイが90部,ACポリエチレン
617Aが2部,ステアリン酸が1部,亜鉛華5部,Z
nEDCまたはZnBDCを0.5部とし,シランカッ
プリング剤(東レ・ダウコーニング・シリコーン株式会
社製)を入れる。加硫条件は380度cで5分で行う
と,ショア硬さAが41,100%引張応力が11Kg
/cm2,引張強さが96Kg/cm2,伸び率が780
%となる。The material of the unvulcanized rubber sheet 14 is mainly composed of butyl rubber in this embodiment. The rubber of the examples is 100 parts of chlorobutyl rubber 1066 manufactured by Bayer Japan KK, 30 parts of white carbon manufactured by Nippon Silica, 3 parts of zinc white, 5 parts of magnesium oxide, 3 parts of titanium oxide, 1 part of stearic acid, and organo. It is composed of 0.5 part of silane, 2 parts of AC polyethylene, and 1.5 parts of dipentamethylene thiuram tetrasulfide. The vulcanization temperature is 160 ° C to 180 ° C, and the vulcanization time is 5 to 8 minutes. In addition, in other experimental examples, the rubber constituting the rubber stopper is chlorobutyl 106
6 is 100 parts, calcined clay is 90 parts, AC polyethylene 617A is 2 parts, stearic acid is 1 part, zinc white 5 parts, Z
Add 0.5 parts of nEDC or ZnBDC and add a silane coupling agent (manufactured by Toray Dow Corning Silicone Co., Ltd.). The vulcanization condition was 380 ° C for 5 minutes, the Shore hardness A was 41, and the 100% tensile stress was 11 kg.
/ Cm 2 , tensile strength 96 kg / cm 2 , elongation 780
%.
【0041】第1フィルムシート13及び第2フィルム
シート15は,テトラフルオロエチレンとエチレンの共
重合体であり,薬液に不活性である。このテトラフルオ
ロエチレンとエチレンとの共重合体としては,例えば旭
硝子株式会社製の商品名「アフレックス」を用いる。こ
のテトラフルオロエチレンとエチレンとの共重合体は,
前述のシランカップリング剤がゴム材質の中に配合され
ているので,ゴム栓の表面と結合し易く,十分に固着す
る。The first film sheet 13 and the second film sheet 15 are copolymers of tetrafluoroethylene and ethylene and are inert to the chemical liquid. As the copolymer of tetrafluoroethylene and ethylene, for example, the trade name "Aflex" manufactured by Asahi Glass Co., Ltd. is used. The copolymer of tetrafluoroethylene and ethylene is
Since the above-mentioned silane coupling agent is mixed in the rubber material, it is easily bonded to the surface of the rubber stopper and is firmly fixed.
【0042】下金型10の凹部12は,ツバ部2の角部
2dの下部を形成するように,角部2dの途中までを形
成するテーパー部12aとリング状凹部6を形成するリ
ング状凸部16とを有している。凹部12の平面12b
は,瓶口接触面2cの位置より深く形成されている。こ
れは,後述するようにカッター20で平面部12bによ
って形成された部位を除去するためである。The recess 12 of the lower die 10 is a ring-shaped projection that forms a taper portion 12a and a ring-shaped recess 6 that form part of the corner 2d so as to form the lower portion of the corner 2d of the brim 2. And part 16. Plane 12b of recess 12
Is formed deeper than the position of the bottle mouth contact surface 2c. This is for removing the portion formed by the flat portion 12b by the cutter 20 as described later.
【0043】この第2フィルムシート15の上方には上
金型11を配設する。上金型11には凹部12に対向し
てツバ部2を形成する凹部17が形成されている。凹部
17の周囲は,ツバ部2の角部2dの上部を形成するテ
ーパー部17aが形成されており,第1フィルムシート
13が凹部17から容易に抜けるようになっている。テ
ーパー部17a,12aは互いに合わせられて角部2d
を形成する。An upper die 11 is arranged above the second film sheet 15. The upper mold 11 is formed with a recess 17 facing the recess 12 and forming the brim 2. A taper portion 17a that forms an upper portion of the corner portion 2d of the brim portion 2 is formed around the concave portion 17 so that the first film sheet 13 can be easily removed from the concave portion 17. The taper portions 17a and 12a are aligned with each other to form the corner portion 2d.
To form.
【0044】上金型11と下金型10との間に,第1フ
ィルムシート13,未加硫ゴムシート14,第2フィル
ムシート15が配設されたら,未加硫ゴムシート14の
規格にあった周知の所定の温度及び圧力により加熱加圧
する。これによって,図3に示すように,ゴム栓素体を
多数形成したゴム栓素体シート18が形成される。この
ゴム栓素体シート18には,ゴム栓1が多数連設されて
いる。When the first film sheet 13, the unvulcanized rubber sheet 14 and the second film sheet 15 are arranged between the upper mold 11 and the lower mold 10, the standard of the unvulcanized rubber sheet 14 is satisfied. It is heated and pressed at a known predetermined temperature and pressure. As a result, as shown in FIG. 3, a rubber plug element sheet 18 having a large number of rubber plug elements is formed. A large number of rubber stoppers 1 are connected to the rubber stopper body sheet 18.
【0045】このゴム栓素体シート18からゴム栓1を
切り離すには,ポンチを用いて打ち抜く。このとき,角
部2dがツバ部2の側部周面2aより内側に位置してい
るため,ポンチの刃先が角部2dから離れて図3の一点
鎖線19の位置で切断するため,角部2dにおいてフィ
ルム13,15がゴムから剥離しない。To separate the rubber plug 1 from the rubber plug element sheet 18, punching is performed using a punch. At this time, since the corner portion 2d is located inside the side peripheral surface 2a of the brim portion 2, the cutting edge of the punch separates from the corner portion 2d and cuts at the position of the alternate long and short dash line 19 in FIG. In 2d, the films 13 and 15 do not separate from the rubber.
【0046】ポンチにより一点鎖線19の位置でゴム栓
素体を打ち抜いた後には,カッター20でゴム栓素体2
1の側面を切断する。この切断の工程の前に,図4に示
すように,ゴム栓素体21を筒状治具22に載せ,ツバ
部2の天面部を吸引パッド23などの空気を吸引する吸
着手段で保持する。筒状部材22の先端部の口径はリン
グ状凹部6の口径と等しく設定する。ゴム栓素体21を
吸引パッド23及び筒状治具22で固定したら,吸着パ
ッド23をゴム栓素体21の中心部を通る線24で回転
させる。この回転状態で,カッター20をゴム栓素体2
1の角部2dの瓶口接触面2cの位置に進入させると,
ツバ部2の肉厚が厚いため,瓶口接触面2cの位置で切
れる。このとき,筒状治具22がリング状凹部6に入っ
ているので,カッター20の刃先から加わる力が筒状治
具22によって受けられるので,瓶口接触面2cにきれ
いな切断面が形成され,ゴム面が露出する。また,ゴム
栓素体21の周囲において,第1フィルムシート13,
未加硫ゴムシート14,第2フィルムシート15が薄く
なっている部分が切断されるため,第1フィルムシート
13,未加硫ゴムシート14,第2フィルムシート15
が角部2dの壁面及びリング状凹部6の内壁から剥離し
ない。After punching the rubber plug element at the position of the one-dot chain line 19 with the punch, the rubber plug element 2 is cut by the cutter 20.
Cut the side of 1. Before this cutting step, as shown in FIG. 4, the rubber plug element body 21 is placed on the cylindrical jig 22, and the top surface portion of the brim portion 2 is held by suction means such as a suction pad 23 for sucking air. . The diameter of the tip of the tubular member 22 is set to be equal to the diameter of the ring-shaped recess 6. After the rubber plug element body 21 is fixed by the suction pad 23 and the cylindrical jig 22, the suction pad 23 is rotated by the line 24 passing through the central portion of the rubber plug element body 21. In this rotating state, the cutter 20 is attached to the rubber stopper element 2
When entering the position of the bottle mouth contact surface 2c of the corner 2d of 1,
Since the brim portion 2 is thick, it is cut at the position of the bottle mouth contact surface 2c. At this time, since the tubular jig 22 is contained in the ring-shaped recess 6, the force applied from the cutting edge of the cutter 20 is received by the tubular jig 22, so that a clean cut surface is formed on the bottle mouth contact surface 2c. The rubber surface is exposed. In addition, around the rubber plug body 21, the first film sheet 13,
Since the thin portions of the unvulcanized rubber sheet 14 and the second film sheet 15 are cut, the first film sheet 13, the unvulcanized rubber sheet 14, and the second film sheet 15 are cut.
Does not separate from the wall surface of the corner 2d and the inner wall of the ring-shaped recess 6.
【0047】[0047]
【発明の効果】本発明の請求項1のゴム栓によれば,一
回の成形で各部とツバ部とを成形できるので,様々な汚
れを内部に封じ込めるおそれがなく,ゴムのバージン性
を確保するので,針先の汚染がない。また,ツバ部の天
面部が第1フィルム層により覆われているので,汚れが
付いても第1フィルム層により簡単に洗浄出来るので,
汚れが残ることがない。According to the rubber plug of the first aspect of the present invention, since each part and the brim can be molded by one molding, there is no possibility of entrapping various dirts inside and the virgin property of the rubber is secured. There is no contamination of the needle tip. Also, since the top surface of the brim is covered with the first film layer, even if it gets dirty, it can be easily washed with the first film layer.
No dirt will remain.
【0048】また,ツバ部と瓶口接触面との角部が面取
りされ,ツバ部の天面部から角部を含んで瓶口接触面の
端部に至るまで第1フィルム層で覆われ,第1フィルム
層の終端部が面取り角部においてツバ部側面部よりもす
ぼんだ形状になるので,第1フィルム層の終端部がゴム
から剥離し難い。Further, the corner portion between the brim portion and the bottle mouth contact surface is chamfered, and the first film layer covers from the top surface portion of the brim portion to the end of the bottle mouth contact surface including the corner portion. Since the end portion of the first film layer has a shape that is narrower than the side surface of the brim portion at the chamfered corner portion, it is difficult for the end portion of the first film layer to peel off from the rubber.
【0049】さらに,第2フィルム層の終端部が瓶口接
触面のリング状凹部の内壁面を覆っており,筒状に丸め
られた状態になるので,強度が向上すると共に,リング
状凹部内部にあるので剥離しにくい。Furthermore, since the end portion of the second film layer covers the inner wall surface of the ring-shaped recess on the bottle mouth contact surface and is rolled into a tubular shape, the strength is improved and the inside of the ring-shaped recess is improved. It is hard to peel off because it is in.
【0050】このように,フィルムの隙間に洗浄液が残
らない。また脚部表面の第2フィルム層によりゴムと薬
液の接触が回避されて薬液の変質が防止され,さらに密
封性が高く,さらに金型や加工工程が少なく量産に有利
である。As described above, no cleaning liquid remains in the gap between the films. Further, the second film layer on the surface of the leg portion prevents contact between the rubber and the chemical liquid to prevent the chemical liquid from deteriorating, has a high sealing property, and is advantageous in mass production because of less molds and processing steps.
【0051】瓶口接触面において第1フィルム層の終端
部と第2フィルム層の終端部との間,すなわち,リング
状凹部と面取り角部との間にゴム面が露呈し,リング状
凹部が形成されているため,アルミ金属などで瓶口にか
しめる力が脚部側に分散しにくいので,しっかりと瓶口
接触面が瓶口に密着する。従って,ガラスなどの瓶口上
端部と密着して封止機能が向上する。なお,脚部の表面
の第2フィルム層は薬瓶の打栓をするためのゴム栓整列
用フィーダにおいて滑りが良いため,ゴム栓整列用フィ
ーダでのつまり解除のために手でさわる機会がなくな
り,汚染の可能性をいっそう少なくすることができると
共に,打栓作業時間を短縮化できる。At the bottle mouth contact surface, the rubber surface is exposed between the end portion of the first film layer and the end portion of the second film layer, that is, between the ring-shaped recess and the chamfered corner, and the ring-shaped recess is formed. Since it is formed, the caulking force with the aluminum metal etc. is difficult to disperse to the leg side, so the bottle mouth contact surface firmly adheres to the bottle mouth. Therefore, the sealing function is improved by making close contact with the upper end of the bottle mouth such as glass. In addition, since the second film layer on the surface of the leg portion slides well in the rubber stopper aligning feeder for capping the vial, there is no chance of being touched manually by the rubber stopper aligning feeder to release it. , The possibility of contamination can be further reduced, and the plugging work time can be shortened.
【0052】請求項2のゴム栓によれば,フィルムに代
えてコート層でゴム面を覆うので,フィルムで覆ったゴ
ム栓と同様な効果を得られる。According to the rubber plug of the second aspect, since the rubber surface is covered with the coat layer instead of the film, the same effect as the rubber plug covered with the film can be obtained.
【0053】請求項3のゴム栓によれば,リング状凹部
内にシールリングが設けられるので,第2フィルム層の
終端部がよりいっそう剥離し難くなると共に,瓶口上端
面の密封性がさらに向上する。According to the rubber stopper of the third aspect, since the seal ring is provided in the ring-shaped recess, the end portion of the second film layer becomes more difficult to peel off, and the sealing property of the upper end face of the bottle mouth is further improved. To do.
【0054】請求項4のゴム栓の製造方法によれば,リ
ング状凹部の底を筒状部材で保持しているから,ツバ部
の面取り角部の途中から瓶口接触面の凹部の底部近傍に
向かって水平に切断しても,第1フィルム層とゴムと第
2フィルム層とを確実に切ることができ,第1,第2フ
ィルム層の終端部の剥離が生じない。また,瓶口接触面
の脚部側が第2フィルム層で覆われ,ツバ部の天面部及
び側面部並びに角部が第1フィルム層で覆われる一方,
角部とリング状凹部との間にゴムが露呈するので密封性
が向上する。特に,リング状凹部が形成されているた
め,アルミ金属などで瓶口にかしめる力が脚部側に分散
しにくいので,しっかりと瓶口接触面が瓶口に密着す
る。従って,ガラスなどの瓶口上端部と密着して封止機
能が向上する。According to the method for producing a rubber stopper of claim 4, since the bottom of the ring-shaped recess is held by the tubular member, the vicinity of the bottom of the recess on the bottle mouth contacting surface is reached from the middle of the chamfered corner of the brim. The first film layer, the rubber, and the second film layer can be reliably cut even when cut horizontally toward, and the end portions of the first and second film layers are not peeled off. In addition, the leg side of the bottle mouth contact surface is covered with the second film layer, and the top and side surfaces of the brim and the corners are covered with the first film layer,
Since the rubber is exposed between the corner and the ring-shaped recess, the sealing performance is improved. In particular, since the ring-shaped recess is formed, the force of caulking the bottle mouth with aluminum metal or the like is difficult to distribute to the leg side, so the bottle mouth contact surface firmly adheres to the bottle mouth. Therefore, the sealing function is improved by making close contact with the upper end of the bottle mouth such as glass.
【0055】さらに,ツバ部と脚部とを一体成形し,ゴ
ム栓素体の角部の途中からリング状凹部の底部までの部
分を水平にカットするから,注射針の汚染防止用ラミネ
ートフィルムの位置がフランジ中間できちんと止めてお
くことができる。リング状凹部と脚部との間は,第2フ
ィルム層で覆われているから,薬液がゴムと接触する部
分がない。このような安全な医薬用のラミネート式ゴム
栓を量産できる。Further, since the brim portion and the leg portion are integrally formed, and the portion from the middle of the corner portion of the rubber stopper body to the bottom portion of the ring-shaped recess is cut horizontally, the laminated film for preventing contamination of the injection needle is formed. The position can be stopped properly at the middle of the flange. Since the second film layer covers between the ring-shaped concave portion and the leg portion, there is no portion where the chemical solution contacts the rubber. Such a safe laminated rubber stopper for medical use can be mass-produced.
【0056】従来の医薬用ラミネートゴム栓を生産する
には,一次成形用の上金型及び下金型並びに二次成形用
の上金型及び下金型とを必要とし,さらにゴム成形機も
2機必要であったが,本発明によれば一次成形用の金型
ですむため,従来より簡単且つ手間がかからず,製造コ
ストが低廉化でき,量産の効率が良い。In order to produce a conventional laminated rubber stopper for medicine, an upper mold and a lower mold for primary molding and an upper mold and a lower mold for secondary molding are required, and a rubber molding machine is also used. Although two machines were required, according to the present invention, since a mold for primary molding is required, it is simpler and less labor intensive than before, the manufacturing cost can be reduced, and the mass production efficiency is good.
【図1】本発明の実施例にかかるゴム栓の断面図FIG. 1 is a sectional view of a rubber plug according to an embodiment of the present invention.
【図2】本実施例のゴム栓の下金型と上金型との間に第
1,第2フィルム及び未加硫ゴムシートを配設した状態
の断面図FIG. 2 is a cross-sectional view showing a state in which first and second films and an unvulcanized rubber sheet are arranged between a lower mold and an upper mold of the rubber plug of this embodiment.
【図3】図2の上金型と下金型とを加熱加圧した状態の
断面図3 is a cross-sectional view of the upper mold and the lower mold of FIG. 2 in a state of being heated and pressed.
【図4】ゴム栓素体をカットする状態の断面図FIG. 4 is a cross-sectional view showing a state in which the rubber plug element is cut.
【図5】本実施例のゴム栓を瓶に装着してアルミ板にて
固定した状態の断面図FIG. 5 is a cross-sectional view of the rubber stopper of the present embodiment mounted on a bottle and fixed with an aluminum plate.
1…ゴム栓 2…ツバ部 2a…ツバ部の側部周面 2b…ツバ部の天面部 2c…ツバ部の瓶口接触面 2d…ツバ部の角部 3…脚部 4…フィルム 5…フィルム 6…リング状凹部 7…シールリング DESCRIPTION OF SYMBOLS 1 ... Rubber stopper 2 ... Collar portion 2a ... Side peripheral surface of the collar portion 2b ... Top surface portion of the collar portion 2c ... Bottle mouth contact surface of the collar portion 2d ... Corner portion of the collar portion 3 ... Leg portion 4 ... Film 5 ... Film 6 ... Ring-shaped recess 7 ... Seal ring
───────────────────────────────────────────────────── フロントページの続き (72)発明者 平泉 裕一 東京都葛飾区東四つ木4−2−22 有限会 社上総硬質クローム内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yuichi Hiraizumi Inventor Yuichi Hiraizumi 4-2-22 Higashiyotsugi, Katsushika-ku, Tokyo Kazusa Hard Chrome Co., Ltd.
Claims (4)
バ部の下面から突出して瓶口の内部に圧入される脚部と
からなるゴム栓であって,前記ツバ部の側部周面と,前
記瓶口の上端面に接触する瓶口接触面とで形成される角
部が面取りされており,前記ツバ部の天面部から側部周
面さらに面取り済みの角部にかけて薬液に不活性な第1
フィルム層が形成され,前記ツバ部の瓶口接触面に前記
脚部の根元を取り囲む環状の凹部が形成され,この凹部
の内壁面と前記脚部の表面とにかけて前記薬液に不活性
な第2フィルム層が形成され,前記第1フィルム層の終
端部と前記第2フィルム層の終端部との間に位置する瓶
口接触面にゴム面が露出することを特徴とするゴム栓。1. A rubber stopper comprising a brim portion that comes into contact with an upper end surface of a bottle mouth, and a leg portion that projects from a lower surface of the brim portion and is press-fitted into the bottle mouth, the side portion of the brim portion. The corner portion formed by the peripheral surface and the bottle mouth contact surface that contacts the upper end surface of the bottle mouth is chamfered, and the chemical solution is applied from the top surface portion of the brim portion to the side peripheral surface and the chamfered corner portion. Inactive first
A film layer is formed, and an annular recess surrounding the root of the leg is formed on the bottle mouth contact surface of the brim, and a second inert layer is formed between the inner wall surface of the recess and the surface of the leg. A rubber stopper, wherein a film layer is formed, and a rubber surface is exposed at a bottle mouth contact surface located between an end portion of the first film layer and an end portion of the second film layer.
バ部の下面から突出して瓶口の内部に圧入される脚部と
からなるゴム栓であって,前記ツバ部の側部周面と,前
記瓶口の上端面に接触する瓶口接触面とで形成される角
部が面取りされており,前記ツバ部の天面部から側部周
面さらに面取り済みの角部にかけて薬液に不活性な第1
コート層が形成され,前記ツバ部の瓶口接触面に前記脚
部の根元を取り囲む環状の凹部が形成され,この凹部の
内壁面と前記脚部の表面とにかけて前記薬液に不活性な
第2コート層が形成され,前記第1コート層の終端部と
前記第2コート層の終端部との間に位置する瓶口接触面
にゴム面が露出することを特徴とするゴム栓。2. A rubber stopper comprising a brim portion that comes into contact with the upper end surface of the bottle mouth, and a leg portion that projects from the lower surface of the brim portion and is press-fitted into the bottle mouth, the side portion of the brim portion. The corner portion formed by the peripheral surface and the bottle mouth contact surface that contacts the upper end surface of the bottle mouth is chamfered, and the chemical solution is applied from the top surface portion of the brim portion to the side peripheral surface and the chamfered corner portion. Inactive first
A coat layer is formed, and a ring-shaped recess surrounding the root of the leg is formed on the bottle mouth contact surface of the brim. The second inner surface of the recess and the surface of the leg is inert to the chemical liquid. A rubber stopper, wherein a coat layer is formed, and a rubber surface is exposed at a bottle mouth contact surface located between an end portion of the first coat layer and an end portion of the second coat layer.
ールリングを備えていることを特徴とするゴム栓。3. The rubber plug according to claim 1, wherein the recess has a seal ring.
液に不活性な第1フィルムを敷設し,この第1フィルム
の上に未加硫ゴムシートを敷設し,この未加硫ゴムシー
トの上に封入薬液に不活性な第2フィルムを敷設し,こ
の第2フィルムの上方に前記脚部形成用の凹部に対向し
てツバ部形成用の凹部を有する上金型を配設し,前記上
金型と下金型とを加熱加圧してゴム栓素体の多数形成シ
ートを形成し,このゴム栓素体の多数形成シートを打ち
抜いてゴム栓を得るゴム栓の製造方法であって,前記下
金型に,前記ツバ部の外径相当大の凹部を形成すると共
に,この凹部の周縁を面取りし,この凹部の中心部位に
脚部用凹部を形成し,この脚部用凹部の周りにこの脚部
用凹部を取り囲むリング状の凸部を形成したものを用
い,前記ゴム栓素体の多数形成シートの打ち抜き工程
後,前記リング状の凸部によりゴム栓素体の瓶口接触面
に形成されたリング凹部に,このリング凹部と同大の筒
状部材を進入させると共に,この筒状部材と前記ツバ部
の天面部を支える部材とにより前記ゴム栓素体を保持
し,前記リング凹部の底部より浅い位置であって,前記
ツバ部の側面部の面取り角部の途中から前記筒状部材の
先端部にめがけて水平に切断を行うことにより,前記面
取り角部と前記リング凹部との間にゴム面を露呈させる
ことを特徴とするゴム栓の製造方法。4. A lower die having recesses for forming legs is laid with a first film inert to an encapsulating chemical solution, and an unvulcanized rubber sheet is laid on the first film. A second film which is inert to the enclosed chemical liquid is laid on a rubber sheet, and an upper mold having a recess for forming a brim is provided above the second film so as to face the recess for forming the leg. Then, the upper mold and the lower mold are heated and pressed to form a multi-formed sheet of the rubber plug element body, and the multi-formed sheet of the rubber plug element body is punched out to obtain a rubber plug. Therefore, a recess having a large outer diameter of the brim is formed in the lower mold, and the peripheral edge of the recess is chamfered to form a leg recess at the center of the recess. A rubber plug element body is used, in which a ring-shaped convex portion surrounding the concave portion for the leg is formed around the concave portion. After the punching process of the multi-forming sheet, a cylindrical member having the same size as the ring concave portion is inserted into the ring concave portion formed on the bottle mouth contact surface of the rubber stopper body by the ring convex portion, and The rubber plug element is held by a member and a member that supports the top surface of the brim portion, and the tubular shape is located at a position shallower than the bottom portion of the ring recess and from the middle of the chamfered corner portion of the side surface portion of the brim portion. A method for manufacturing a rubber stopper, characterized in that a rubber surface is exposed between the chamfered corner portion and the ring recessed portion by horizontally cutting the tip end of the member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6319705A JPH08175554A (en) | 1994-12-22 | 1994-12-22 | Rubber stopper, and manufacture thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6319705A JPH08175554A (en) | 1994-12-22 | 1994-12-22 | Rubber stopper, and manufacture thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH08175554A true JPH08175554A (en) | 1996-07-09 |
Family
ID=18113263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6319705A Pending JPH08175554A (en) | 1994-12-22 | 1994-12-22 | Rubber stopper, and manufacture thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH08175554A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009051282A1 (en) * | 2007-10-18 | 2009-04-23 | Daikyo Seiko, Ltd. | Vial rubber-stopper |
EP3243625A1 (en) * | 2016-05-11 | 2017-11-15 | Sumitomo Rubber Industries, Ltd. | Medical rubber stopper and method for producing medical rubber stopper |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5829939U (en) * | 1981-08-24 | 1983-02-26 | 武田薬品工業株式会社 | Rubber stopper for vial |
JPS63296756A (en) * | 1987-05-29 | 1988-12-02 | Daikyo Rubber Seiko:Kk | Double-side laminated rubber plug |
-
1994
- 1994-12-22 JP JP6319705A patent/JPH08175554A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5829939U (en) * | 1981-08-24 | 1983-02-26 | 武田薬品工業株式会社 | Rubber stopper for vial |
JPS63296756A (en) * | 1987-05-29 | 1988-12-02 | Daikyo Rubber Seiko:Kk | Double-side laminated rubber plug |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009051282A1 (en) * | 2007-10-18 | 2009-04-23 | Daikyo Seiko, Ltd. | Vial rubber-stopper |
EP3243625A1 (en) * | 2016-05-11 | 2017-11-15 | Sumitomo Rubber Industries, Ltd. | Medical rubber stopper and method for producing medical rubber stopper |
JP2017202848A (en) * | 2016-05-11 | 2017-11-16 | 住友ゴム工業株式会社 | Medical rubber plug and manufacturing method of the same |
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