JPH09192246A - Dust protective mask - Google Patents
Dust protective maskInfo
- Publication number
- JPH09192246A JPH09192246A JP8023321A JP2332196A JPH09192246A JP H09192246 A JPH09192246 A JP H09192246A JP 8023321 A JP8023321 A JP 8023321A JP 2332196 A JP2332196 A JP 2332196A JP H09192246 A JPH09192246 A JP H09192246A
- Authority
- JP
- Japan
- Prior art keywords
- annular member
- filter unit
- face
- annular
- mask
- 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.)
- Granted
Links
Landscapes
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、防じんマスクに
関し、特に原子力発電所等の放射線管理区域で使用する
のに好適な防じんマスクに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust mask, and more particularly to a dust mask suitable for use in a radiation controlled area such as a nuclear power plant.
【０００２】[0002]
【従来の技術】図５に部分分解図で示す周知の防じんマ
スク１０１は、着用者の口許や鼻孔の周辺を覆う面体１
０２と、面体１０２に着脱可能な使い捨てフィルタユニ
ット１０３とによって構成されている。面体１０２は、
面口部材１０２Ａ、しめひも１０４、伝声器１０５、カ
バー部材１０６で覆われた排気弁（図示せず）を有し、
左右両側にフィルタユニット受け座１０７を有する。受
け座１０７は、中央の開口１０８を介して面口部材１０
２Ａ内部に通気可能につながり、円筒状周壁１０９の内
側に螺条（図示せず）を有する。フィルタユニット１０
３は、円盤状であって、端部周壁１１１が周壁１０９の
内側に螺合可能である。図示していないが、フィルタユ
ニット１０３の内部には、同心円状に形成された多数の
プリーツを有する周知のろ紙フィルタが取り付けられて
いる。2. Description of the Related Art A well-known dust mask 101 shown in a partially exploded view in FIG.
02 and a disposable filter unit 103 detachable from the face body 102. The facepiece 102 is
It has a face opening member 102A, a lace 104, a voice transmitter 105, and an exhaust valve (not shown) covered with a cover member 106,
It has filter unit receiving seats 107 on both left and right sides. The receiving seat 107 is connected to the face member 10 through the central opening 108.
2A has a thread (not shown) inside the cylindrical peripheral wall 109 so as to be able to ventilate. Filter unit 10
Reference numeral 3 denotes a disk shape, and the end peripheral wall 111 can be screwed inside the peripheral wall 109. Although not shown, a well-known filter paper filter having a large number of concentric pleats is attached inside the filter unit 103.
【０００３】かかるマスク１０１は、その使用環境に応
じて定められた使用時間等の基準条件に達すると、フィ
ルタユニット１０３が新品と取り替えられる。When such a mask 101 reaches a reference condition such as a use time determined according to the use environment, the filter unit 103 is replaced with a new one.
【０００４】[0004]
【発明が解決しようとする課題】原子力発電所等の放射
線管理区域では、放射性の塵埃を吸入することがないよ
うに防じんマスクを着用する。前記従来技術の防じんマ
スク１０１は、そのために使用し得るものの一例である
が、このマスクには次のような問題がある。 （１）防じんマスク１０１を使用中に、フィルタユニッ
ト１０３に衝撃や振動が加わると、フィルタユニット１
０３の取り付けが緩み、受け座１０７との間に隙間が生
じてろ過されない外気を吸入する恐れがある。 （２）前記管理区域で使用した防じんマスク１０１は、
フィルタユニット１０３を取り外した後に面体１０２を
洗滌し、残留放射能を測定して放射性塵埃の付着がない
ことを確認したうえで再度使用する。かかる洗滌や測定
は、面体１０２の形状が単純であるほど容易になる。し
かるに、従来の防じんマスク１０１の場合には、受け座
１０７が比較的大きな背面のうちのごく一部で面口部材
１０２Ａに固定され、その背面の残余の部位と面口部材
１０２Ａとの間に間隙１０７Ａが生じる。かかる間隙１
０７Ａにおいて、面口部材１０２Ａの表面や受け座１０
７の背面を洗滌したり測定したりすることには、その間
隙が狭隘であるだけに、少なからず手間がかかる。In a radiation control area such as a nuclear power plant, a dust mask is worn to prevent inhalation of radioactive dust. The dust mask 101 of the prior art described above is an example of what can be used for that purpose, but this mask has the following problems. (1) If shock or vibration is applied to the filter unit 103 while using the dust mask 101, the filter unit 1
There is a risk that the attachment of 03 will be loosened, and a gap will be created between it and the receiving seat 107, and outside air that has not been filtered will be sucked. (2) The dust mask 101 used in the control area is
After removing the filter unit 103, the face body 102 is washed, and the remaining radioactivity is measured to confirm that radioactive dust is not attached, and then used again. Such cleaning and measurement become easier as the shape of the face piece 102 becomes simpler. However, in the case of the conventional dust mask 101, the receiving seat 107 is fixed to the face-opening member 102A by a small part of the relatively large back face, and between the remaining portion of the back face and the face-opening member 102A. A gap 107A is created. Such a gap 1
07A, the surface of the face-opening member 102A and the receiving seat 10
Cleaning and measuring the back of 7 requires a lot of time and effort because the gap is narrow.
【０００５】そこで、この発明は、放射線管理区域で使
用可能な高捕集効率の防じんマスクにおいて、取り付け
たフィルタユニットに緩みが生じないようにしたり、面
体の洗滌や測定を容易にしたりすることを課題にしてい
る。In view of the above, the present invention is intended to prevent the attached filter unit from being loosened and to facilitate cleaning and measurement of a face piece in a dust mask having a high collection efficiency which can be used in a radiation controlled area. I have an issue.
【０００６】[0006]
【課題を解決するための手段】前記発明を解決するため
に、この発明においては、着用者の少なくとも口許と鼻
孔周辺とを覆うことが可能な面体と、該面体に着脱可能
なフィルタユニットとからなる防じんマスクを前提とし
ている。In order to solve the above-mentioned problem, in the present invention, a face body capable of covering at least a mouth and a periphery of a nostril of a wearer and a filter unit detachable from the face body are provided. It is assumed that a dustproof mask is used.
【０００７】かかる前提において、前記面体が柔軟弾性
材料の面口部材と、前記フィルタユニット取り付けのた
めの第１係合手段とを有する一方、前記フィルタユニッ
トが外気をろ過して取り入れ可能な外気ろ過室と、該ろ
過室から延出し、前記第１係合手段に係脱することが可
能な第２係合手段とを有し、前記第１係合手段が第１環
状部材と第２環状部材とからなり、前記第１環状部材は
その基端部周縁が前記面口部材に固定され、前記第２環
状部材は、前記第１環状部材とほぼ同じ外径を有し、前
記第１環状部材に周り方向に回動可能に外側から摺接す
るとともに、これら第１，２環状部材が前記面口部材の
内外の通気を可能にする管路を形成し、前記第２係合手
段が前記管路に前記面口部材の外側から挿抜され、挿入
されたときに前記管路との間に気密状態を保つことが可
能な管状体と、該管状体の外壁に形成された前記第２環
状部材に対する被係合部とからなり、前記第２環状部材
には、前記第２係合手段の挿入後に該第２環状部材が前
記第１環状部材に対して所要方向に回動すると、前記被
係合部に当接して前記第２係合手段の抜脱を防止するこ
とが可能な係合部が形成されていること、がこの発明の
特徴である。[0007] Under such a premise, the face body has a face opening member made of a soft elastic material and first engaging means for attaching the filter unit, while the filter unit is capable of filtering and taking in outside air. And a second engagement means extending from the filtration chamber and capable of being disengaged from the first engagement means, wherein the first engagement means comprises a first annular member and a second annular member. Wherein the first annular member has a base end peripheral edge fixed to the face member, the second annular member has substantially the same outer diameter as the first annular member, and the first annular member The first and second annular members form a conduit which allows ventilation between the inside and the outside of the face opening member, while the second engagement means is provided with the conduit. Is inserted and removed from the outside of the face opening member, and when inserted A tubular body capable of maintaining an airtight state with a road, and a portion to be engaged with the second annular member formed on an outer wall of the tubular body, wherein the second annular member includes (2) When the second annular member rotates in a required direction with respect to the first annular member after insertion of the engaging means, the second annular member contacts the engaged portion to prevent the second engaging means from being pulled out. A feature of the present invention is that an engaging portion that can be formed is formed.
【０００８】[0008]
【実施例】添付の図面を参照して、この発明にかかる防
じんマスクの詳細を説明すると、以下のとおりである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of a dust mask according to the present invention will be described below with reference to the accompanying drawings.
【０００９】図１に一部を分解した部分破断斜視図で示
す防じんマスク１は、面体２と、フィルタユニット３と
によって構成され、面体２は、面口部材２Ａとフィルタ
ユニット受け座７との他に、図３に示した従来技術の防
じんマスク１０１と同様なしめひも１０４、伝声器１０
５、カバー部材１０６で覆われた排気弁（図示せず）を
有する。面口部材２Ａは、柔軟な弾性材料を素材にする
もので、着用者の口許と鼻孔の周辺とを覆い、周縁部が
顔面に密着する。受け座７は、硬質プラスチック製の円
筒状のものであって、面口部材２Ａの左右両側に形成さ
れた吸気孔１５の周縁部に着脱不能に取り付けられてい
る。吸気孔１５は、硬質プラスチックで形成されたリブ
構造１５Ａを有し、該構造１５Ａの内側には吸気用逆止
弁（図示せず）が取り付けられている。A dustproof mask 1 shown in a partially exploded perspective view in FIG. 1 is composed of a face body 2 and a filter unit 3, and the face body 2 is formed by a face opening member 2A and a filter unit receiving seat 7. In addition, the lace 104 and the voice transmitter 10 are similar to the dust mask 101 of the prior art shown in FIG.
5. It has an exhaust valve (not shown) covered by the cover member 106. The face / mouth member 2A is made of a soft elastic material, covers the mouth of the wearer and the periphery of the nostrils, and has a peripheral edge in close contact with the face. The receiving seat 7 has a cylindrical shape made of a hard plastic, and is irremovably attached to a peripheral portion of an intake hole 15 formed on both left and right sides of the face opening member 2A. The intake hole 15 has a rib structure 15A formed of hard plastic, and a check valve for intake (not shown) is mounted inside the structure 15A.
【００１０】フィルタユニット３は、円盤状であって、
その背面側から面口部材２Ａに向かって延びる管状部１
６が受け座７の内側に挿抜可能であり、挿入されたとき
には受け座７との間が気密状態となる。かかる挿入の際
に、管状部１６の外壁において径方向外側へ延びる複数
の突起１７が受け座７の周壁内側に形成された複数条の
軸方向の溝Ｇに嵌入する。次いで、後記するように、受
け座７の外壁部分をその外側にある***部６４を持って
矢印Ｐ方向に回動すると、フィルタユニット３が受け座
７に対して抜脱不能な状態となる。このユニット３を抜
脱するには、受け座７の外壁部分を矢印Ｐとは逆の方向
に回動した後、受け座７から抜き取るようにする。The filter unit 3 has a disk shape,
Tubular portion 1 extending from the back side toward face opening member 2A
6 can be inserted into and removed from the receiving seat 7, and when inserted, the space between the receiving seat 7 and the receiving seat 7 is airtight. At the time of such insertion, a plurality of projections 17 extending radially outward on the outer wall of the tubular portion 16 fit into a plurality of axial grooves G formed inside the peripheral wall of the receiving seat 7. Next, as described later, when the outer wall portion of the receiving seat 7 is rotated in the direction of the arrow P with the raised portion 64 on the outside thereof, the filter unit 3 cannot be removed from the receiving seat 7. To remove the unit 3, the outer wall portion of the receiving seat 7 is rotated in a direction opposite to the arrow P, and then is removed from the receiving seat 7.
【００１１】図２は、図１のＩＩ−ＩＩ線断面図であ
り、併せて受け座７の一部が仮想線で示されている。フ
ィルタユニット３は、図において上下に平行に配置され
ているシート状の前面および背面ろ過材２１，２２と、
これらろ過材２１，２２を所要の離間距離に保つための
スペーサー２３と、２枚のろ過材２１，２２をそれぞれ
覆う前面および背面カバー部材２４，２５とで構成され
ている。FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and a part of the receiving seat 7 is indicated by a virtual line. The filter unit 3 includes sheet-like front and rear filter media 21 and 22 that are arranged vertically in parallel in the drawing,
It comprises a spacer 23 for keeping the filter media 21 and 22 at a required separation distance, and front and rear cover members 24 and 25 for covering the two filter media 21 and 22, respectively.
【００１２】スペーサー２３は、硬質プラスチックの成
形品であって、円筒状の周壁２６と、多孔頂部２７とを
有し、前面ろ過材２１がその頂部２７に載置されてい
る。背面ろ過材２２は、スペーサー２３の下にある。The spacer 23 is a molded product of a hard plastic and has a cylindrical peripheral wall 26 and a porous top 27, and the front filter medium 21 is placed on the top 27. The back filter media 22 is below the spacer 23.
【００１３】前面カバー部材２４は、前面部２９と、前
面部２９内面に放射状に配置されて垂下する複数のリブ
２９Ａと、周壁部３０とを有し、前面部２９の中央部に
はカバー部材２４の内外に通じる通気孔３１がある。The front cover member 24 has a front portion 29, a plurality of ribs 29A radially disposed on the inner surface of the front portion 29 and hanging therefrom, and a peripheral wall portion 30. There is a vent hole 31 that communicates with the inside and outside of 24.
【００１４】背面カバー部材２５は、背面部３２と、背
面部３２内面から上方へ延びる複数の突起３２Ａと、周
壁部３３とを有し、背面部３２の一側には、カバー部材
２５の内外に通じる通気孔３５が、かつ、通気孔３５と
対向する背面部３２の他側には、フィルタユニット３を
面体２に取り付けるための前記管状部１６とがある。The back cover member 25 has a back portion 32, a plurality of protrusions 32A extending upward from the inner surface of the back portion 32, and a peripheral wall portion 33. One side of the back portion 32 has inside and outside of the cover member 25. On the other side of the back surface 32 facing the ventilation hole 35, there is the tubular portion 16 for attaching the filter unit 3 to the face body 2.
【００１５】前面と背面のカバー部材２４，２５は、互
いの周壁部３０，３３の対向縁に形成された相欠き部が
一体的に接合している。かかる接合状態において、前面
カバー部材２４は、前面部２９内面の周縁部分とリブ２
９Ａとがスペーサー２３の周壁２６の上縁部２６Ａと多
孔頂部２７とによって前面ろ過材２１を位置ずれするこ
とがないように挟圧している。また、背面カバー部材２
５は、背面部３２内面の周縁部分とスペーサー２３の周
壁２６の下縁部２６Ｂとが背面ろ過材２２を位置ずれす
ることがないように挟圧し、背面部３２の突起３２Ａと
背面部通気孔３５が形成されている凹状部３７の頂部と
が背面ろ過材２２を垂れ下がることがないように支えて
いる。The front and rear cover members 24, 25 are integrally joined to a pair of notches formed at the opposing edges of the peripheral wall portions 30, 33. In such a joined state, the front cover member 24 is attached to the peripheral portion of the inner surface of the front portion 29 and the rib 2.
9A presses the front filter medium 21 with the upper edge 26A of the peripheral wall 26 of the spacer 23 and the porous top 27 so as not to displace. In addition, the back cover member 2
5 presses the rear filter medium 22 so that the peripheral portion of the inner surface of the rear portion 32 and the lower edge portion 26B of the peripheral wall 26 of the spacer 23 do not shift, and the protrusion 32A of the rear portion 32 and the rear portion ventilation hole The top of the concave portion 37 in which 35 is formed supports the back filter medium 22 so as not to hang down.
【００１６】管状部１６は、その外径が背面カバー部材
２５のそれよりも小さく、背面部３２の内外を貫通する
ように背面カバー部材２５に一体的に形成されている。
管状部１６の内端（図における上端）部４１は、背面ろ
過材２２をその周縁部近傍に形成された透孔４２におい
て貫通し、外端（下端）部４３は、背面部３２から面口
部材２Ａの受け座７に向かって延出している。背面ろ過
材２２は、透孔４２の周縁部が管状部１６の外周に形成
された段差部４４に対し、管状部１６外周に圧嵌するリ
ング部材４５によって押圧され、気密状態で当接してい
る。管状部１６は、係止爪１７の下にＯ−リング４５を
有する。The tubular portion 16 has an outer diameter smaller than that of the back cover member 25 and is formed integrally with the back cover member 25 so as to pass through the inside and outside of the back portion 32.
An inner end (upper end in the figure) 41 of the tubular portion 16 penetrates the back filter medium 22 through a through-hole 42 formed near the periphery thereof, and an outer end (lower end) portion 43 extends from the back surface 32 to the face opening. It extends toward the receiving seat 7 of the member 2A. The back surface filtering material 22 is pressed against the step portion 44 formed at the outer periphery of the tubular portion 16 at the peripheral portion of the through hole 42 by the ring member 45 press-fitted to the outer periphery of the tubular portion 16, and abuts in an airtight state. . The tubular portion 16 has an O-ring 45 below the pawl 17.
【００１７】前面および背面ろ過材２１，２２には繊維
成分として、羊毛フェルトや合成繊維不織布、羊毛・合
繊混紡不織布等の有機繊維が１００重量％を占める基材
シートに樹脂加工を施し、この樹脂を帯電させて得られ
る静電フィルタを使用することが好ましく、中でも羊毛
フェルトを使用することが特に好ましい。The front and back filtration materials 21 and 22 are subjected to resin processing on a base sheet in which 100% by weight of organic fibers such as wool felt, synthetic fiber non-woven fabric, and wool / synthetic fiber non-woven fabric are used as fiber components. It is preferable to use an electrostatic filter obtained by charging the toner, and it is particularly preferable to use wool felt.
【００１８】このように構成されたフィルタユニット３
では、前面及び背面ろ過材２１，２２とスペーサー２３
とが、外気に対して密閉され、ろ過材２１，２２を通し
てのみ外気を取り入れ可能な外気ろ過室５０を形成し、
管状部１６を介して外気ろ過室５０が面口部材２Ａに通
気可能に連結する。フィルタユニット３が取り付けられ
た防じんマスク１を着用すると、吸気がユニット３の前
面からは矢印Ｃ方向に、背面からは矢印Ｄ方向に流れて
ろ過室５０に入り、さらに矢印Ｅ方向に流れて着用者の
口許や鼻孔に到達する。The filter unit 3 thus constructed
Then, the front and rear filter media 21 and 22 and the spacer 23
And form an outside air filtration chamber 50 that is closed to the outside air and that can take in the outside air only through the filtering media 21 and 22.
The outside air filtration chamber 50 is connected to the face member 2A through the tubular portion 16 so as to be able to ventilate. When the dust mask 1 to which the filter unit 3 is attached is worn, the intake air flows from the front of the unit 3 in the direction of arrow C and from the back in the direction of arrow D to enter the filtration chamber 50, and further flows in the direction of arrow E to be worn. Reaches the mouth and nostrils of the person.
【００１９】図３は、フィルタユニット３の一部と、面
口部材２Ａに取り付けられた受け座７との斜視図である
が、吸気孔１５のフィルタ構造１５Ａ（図１参照）の図
示が省略してある。フィルタユニット３の管状部１６外
壁には４個の突起１７が周方向に等間隔で形成され、突
起１７の上面５１の一部５１Ａが図において右下りのテ
ーパを有する。FIG. 3 is a perspective view of a part of the filter unit 3 and the receiving seat 7 attached to the face member 2A, but the illustration of the filter structure 15A of the intake hole 15 (see FIG. 1) is omitted. I have. Four protrusions 17 are formed at equal intervals in the circumferential direction on the outer wall of the tubular portion 16 of the filter unit 3, and a part 51 </ b> A of the upper surface 51 of the protrusion 17 has a downward taper in the figure.
【００２０】受け座７は、円筒状であって、面口部材２
Ａに基端部周縁が固定された環状部材５５と、部材５５
とほぼ同じ外径を有し、かつ、部材５５に外側から摺接
し、その周り方向に回動可能な可動環状部材５６とによ
って構成され、これら両部材５５，５６が面口部材２Ａ
の内外を通気可能にする管路５４を形成している。The receiving seat 7 is cylindrical and has a face opening member 2.
A, an annular member 55 having a base end peripheral edge fixed to A;
A movable annular member 56 having substantially the same outer diameter as that of the member 55 and slidingly contacting the member 55 from the outside, and being rotatable around the member 55, is formed by the two members 55 and 56.
A pipe 54 is formed to allow air to pass through the inside and outside of the pipe.
【００２１】固定環状部材５５は、その上端部５７の内
壁をを切り欠くことによって形成され、周り方向に等間
隔で配設された４つの凹部５８と、上方へ延び、周り方
向に等間隔で配設された４つの係止爪６０とを有する。The fixed annular member 55 is formed by cutting out the inner wall of the upper end 57 thereof, and has four recesses 58 arranged at equal intervals in the circumferential direction, and extends upward and has equal intervals in the circumferential direction. And four locking claws 60 provided.
【００２２】可動環状部材５６は、周壁６１と頂部６２
とを有し、周壁６１の外周に複数の操作用***部６４が
形成され、頂部６２の内壁に周り方向に等間隔で配設さ
れた４つの凹欠部５９と、頂部６２を上下方向に貫通
し、周り方向に延びる４つの貫通孔６５とを有する。貫
通孔６５には、周り方向に延びる段差部６６が形成され
ている。The movable annular member 56 includes a peripheral wall 61 and a top 62
A plurality of operation raised portions 64 are formed on the outer periphery of the peripheral wall 61, and four concave notches 59 arranged at equal intervals in the circumferential direction on the inner wall of the top portion 62, and the top portion 62 is vertically It has four through holes 65 that penetrate and extend in the circumferential direction. A step portion 66 extending in the circumferential direction is formed in the through hole 65.
【００２３】図のように摺接する両環状部材５５，５６
では、それぞれの凹欠部５８，５９が整列し、管路５４
の軸方向に延びる溝Ｇを形成し、係止爪６０が環状部材
５６の段差部６６に上方から摺動可能に当接して、部材
５６が部材５５から抜脱するのを防止している。可動環
状部材５６は、***部６４に指を当てれば矢印Ｐ方向へ
回動し、係止爪６０の側端が貫通孔６５の端壁６９に当
接してその回動が止まる。そのように回動した可動環状
部材５６の凹欠部５９は、仮想線で示す位置に移動し、
部材５５の凹欠部５８は、その上方が可動環状部材５６
の頂部６２によって塞がれた状態になる。なお、後記す
るように、フィルタユニット３の突起１７は矢印の方向
から溝Ｇに嵌入する。As shown in the figure, the two annular members 55 and 56 slidingly contacting each other.
Then, the respective concave notches 58 and 59 are aligned, and the pipe 54
A groove G extending in the axial direction is formed, and the locking claw 60 is slidably contacted with the stepped portion 66 of the annular member 56 from above, thereby preventing the member 56 from being detached from the member 55. The movable annular member 56 rotates in the direction of the arrow P when a finger is applied to the raised portion 64, and the side end of the locking claw 60 abuts on the end wall 69 of the through hole 65, and the rotation is stopped. The concave notch 59 of the movable annular member 56 thus rotated moves to a position indicated by a virtual line,
The concave notch 58 of the member 55 has a movable annular member 56
Is closed by the top portion 62 of the rim. In addition, as described later, the protrusion 17 of the filter unit 3 fits into the groove G from the direction of the arrow.
【００２４】図４は、図３のＩＶ−ＩＶ線拡大矢視図で
あって、フィルタユニット３が取り付けられる前の状態
を（Ａ）で示し、取り付けられた後の状態を（Ｂ）で示
す。フィルタユニット３の管状部１６の外径は、固定お
よび可動環状部材５５，５６に挿抜可能な寸法に形成さ
れ、挿入されたときには、それぞれの突起１７が矢印Ｑ
方向から溝Ｇに嵌入し、管状部１６は、Ｏ−リング４５
が固定環状部材５５の内周面テーパ部７１に当接して止
まり、図４（Ａ）に仮想線で示した状態となる。次に、
可動環状部材５６がＰ方向（図３参照）に回動すると、
その頂部６２が凹欠部５８を塞ぎ、図４（Ｂ）の状態と
なる。頂部６２は、その下面が突起１７のテーパつき上
面５１Ａ（図３参照）を通過して上面５１に当接し、フ
ィルタユニット３が受け座７に対して抜脱不能な状態に
あり、頂部６２の上面は、殆ど隙間のない状態でフィル
タユニット３の背面３２に接している。頂部６２は、突
起１７を下方に押圧し、Ｏ−リング４５が固定環状部材
５５内周面のテーパ部７１に密着しているから、フィル
タユニット３と受け座７との間が気密状態となる。フィ
ルタユニット３を抜脱するには、可動環状部材５６を矢
印Ｐと逆の方向へ回動する。FIG. 4 is an enlarged view taken along the line IV-IV of FIG. 3, and shows a state before the filter unit 3 is mounted, and FIG. 4B shows a state after the filter unit 3 is mounted. . The outer diameter of the tubular portion 16 of the filter unit 3 is formed such that it can be inserted into and removed from the fixed and movable annular members 55 and 56.
The tubular portion 16 is fitted into the groove G from the
Comes into contact with the inner peripheral surface tapered portion 71 of the fixed annular member 55 and stops, and the state shown by the phantom line in FIG. next,
When the movable annular member 56 rotates in the P direction (see FIG. 3),
The top 62 closes the recess 58, and the state shown in FIG. The top portion 62 has a lower surface passing through the tapered upper surface 51A of the protrusion 17 (see FIG. 3) and abutting on the upper surface 51 so that the filter unit 3 cannot be removed from the receiving seat 7. The upper surface is in contact with the back surface 32 of the filter unit 3 with almost no gap. The top portion 62 presses the projection 17 downward, and the O-ring 45 is in close contact with the tapered portion 71 on the inner peripheral surface of the fixed annular member 55, so that the space between the filter unit 3 and the receiving seat 7 is airtight. . To remove the filter unit 3, the movable annular member 56 is rotated in the direction opposite to the arrow P.
【００２５】可動環状部材５６は、回動するときの抵抗
を適度に強くして、不用意に動くことがないようにする
ことができる。そうすることによって、フィルタユニッ
ト３の取り付けが一層確実になる。The movable annular member 56 can moderately increase the resistance at the time of rotation so that it does not move unintentionally. By doing so, the attachment of the filter unit 3 becomes more reliable.
【００２６】[0026]
【発明の効果】このように構成された防じんマスクで
は、可動環状部材を操作しない限り、取り付けられたフ
ィルタユニットが緩んだり、外れたりすることがない。
従って、フィルタユニットに衝撃や振動が加えられた場
合でも、空気漏れの恐れがない。また、フィルタユニッ
トを外した後の面体に残るのは円筒状の受け座であるか
ら、従来技術のように面口部材と受け座とで洗滌や測定
を困難にする隙間をつくることがない。According to the dust mask thus constructed, the attached filter unit does not come loose or come off unless the movable annular member is operated.
Therefore, there is no possibility of air leakage even when shock or vibration is applied to the filter unit. Further, since the cylindrical receiver remains on the face after the filter unit is removed, there is no gap between the face member and the receiver, which makes cleaning and measurement difficult, unlike the prior art.
【図１】一部を分解した防じんマスクの部分破断斜視
図。FIG. 1 is a partially broken perspective view of a dust mask with a part disassembled.
【図２】図１のＩＩ−ＩＩ線断面図。FIG. 2 is a sectional view taken along line II-II of FIG.
【図３】フィルタユニットの一部と受け座の斜視図。FIG. 3 is a perspective view of a part of a filter unit and a receiving seat.
【図４】図３のＩＶ−ＩＶ線断面図であって（Ａ）はフ
ィルタユニット嵌合前の状態、（Ｂ）はフィルタユニッ
ト嵌合後の状態を示す。4A and 4B are cross-sectional views taken along line IV-IV of FIG. 3, wherein FIG. 4A shows a state before the filter unit is fitted, and FIG. 4B shows a state after the filter unit is fitted.
【図５】従来技術の防じんマスクの、図１と同様な図
面。5 is a drawing similar to FIG. 1 of a prior art dust mask.
１ 防じんマスク ２ 面体 ２Ａ 面口部 ３ フィルタユニット ７ 第１係合手段（受け座） １６ 第２係合手段（管状部） １７ 突起 ２１，２２ ろ過材 ５０ ろ過室 ５４ 管路 ５５ 第１環状部材（固定環状部材） ５６ 第２環状部材（可動環状部材） ５８ 溝部（凹欠部） ５９ 溝部（凹欠部） ６２ 頂部 Ｇ 溝部 DESCRIPTION OF SYMBOLS 1 Dust prevention mask 2 Face body 2A face mouth 3 Filter unit 7 1st engagement means (reception seat) 16 2nd engagement means (tubular part) 17 Projection 21,22 Filtration material 50 Filtration chamber 54 Pipe line 55 First annular member (Fixed annular member) 56 Second annular member (movable annular member) 58 Groove (concave notch) 59 Groove (concave notch) 62 Top G groove
フロントページの続き (72)発明者 大角 彰 東京都千代田区四番町７番地 興研株式会 社内 (72)発明者 平尾 泰広 東京都千代田区四番町７番地 興研株式会 社内Front page continued (72) Inventor Akira Otsuka 7-4 Yonbancho, Chiyoda-ku, Tokyo Koken Stock Company (72) Inventor Yasuhiro Hirao 7-4 Yonbancho, Chiyoda-ku, Tokyo Koken Stock Company
Claims (2)
うことが可能な面体と、該面体に着脱可能なフィルタユ
ニットとからなる防じんマスクであって、 前記面体が柔軟弾性材料の面口部材と、前記フィルタユ
ニット取り付けのための第１係合手段とを有する一方、
前記フィルタユニットが外気をろ過して取り入れ可能な
外気ろ過室と、該ろ過室から延出し、前記第１係合手段
に係脱することが可能な第２係合手段とを有し、 前記第１係合手段が第１環状部材と第２環状部材とから
なり、前記第１環状部材はその基端部周縁が前記面口部
材に固定され、前記第２環状部材は、前記第１環状部材
とほぼ同じ外径を有し、前記第１環状部材に周り方向に
回動可能に外側から摺接するとともに、これら第１，２
環状部材が前記面口部材の内外の通気を可能にする管路
を形成し、 前記第２係合手段が前記管路に前記面口部材の外側から
挿抜され、挿入されたときに前記管路との間に気密状態
を保つことが可能な管状体と、該管状体の外壁に形成さ
れた前記第２環状部材に対する被係合部とからなり、 前記第２環状部材には、前記第２係合手段の挿入後に該
第２環状部材が前記第１環状部材に対して所要方向に回
動すると、前記被係合部に当接して前記第２係合手段の
抜脱を防止することが可能な係合部が形成されているこ
とを特徴とする前記マスク。1. A dust mask comprising a face body capable of covering at least the mouth and the periphery of a nostril of a wearer, and a filter unit detachable from the face body, wherein the face body is made of a soft elastic material. And first engagement means for attaching the filter unit.
The filter unit has an outside air filtration chamber capable of filtering and taking in outside air, and a second engagement means extending from the filtration chamber and capable of being disengaged from the first engagement means. 1 engaging means comprises a first annular member and a second annular member, the first annular member having a base end peripheral edge fixed to the face opening member, and the second annular member comprising the first annular member. And has an outer diameter substantially the same as that of the first and second annular members.
An annular member forms a conduit that allows ventilation between the inside and outside of the face opening member, and the second engagement means is inserted into and removed from the outside of the face opening member into and out of the face opening member. And a portion to be engaged with the second annular member formed on the outer wall of the tubular body, wherein the second annular member includes the second member. When the second annular member rotates in a required direction with respect to the first annular member after the insertion of the engagement means, it is possible to prevent the second engagement means from coming off by contacting the engaged portion. The mask, wherein a possible engaging portion is formed.
うそれぞれの頂部の内壁に、前記第２環状部材が所要の
回動位置にあるときに互いに整列して前記管路の軸方向
に延びる複数条の溝部を形成し、前記第２係合手段の被
係合部が前記管状体の外壁周り方向に間欠的に配設され
た突起であって、前記管状体が前記管路に挿入される
と、該突起が前記溝部に嵌入し、次いで前記第２環状部
材が前記所要方向に回動すると、該部材の頂部が前記係
合部として前記被係合部に当接し、前記第２係合手段の
抜脱を防止可能な請求項１記載のマスク。2. The first and second annular members extend on the inner walls of their respective overlapping tops in the axial direction of the conduit while being aligned with each other when the second annular member is at a required rotational position. A plurality of grooves are formed, and the engaged portion of the second engaging means is a projection intermittently arranged in a direction around the outer wall of the tubular body, wherein the tubular body is inserted into the conduit. Then, when the protrusion is fitted into the groove, and the second annular member is rotated in the required direction, the top of the member comes into contact with the engaged portion as the engagement portion, and the second engagement member is engaged. 2. The mask according to claim 1, wherein the mask can be prevented from coming off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8023321A JP2763870B2 (en) | 1996-01-17 | 1996-01-17 | Dust mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8023321A JP2763870B2 (en) | 1996-01-17 | 1996-01-17 | Dust mask |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09192246A true JPH09192246A (en) | 1997-07-29 |
| JP2763870B2 JP2763870B2 (en) | 1998-06-11 |
Family
ID=12107332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8023321A Expired - Fee Related JP2763870B2 (en) | 1996-01-17 | 1996-01-17 | Dust mask |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2763870B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013085845A (en) * | 2011-10-20 | 2013-05-13 | Koken Ltd | Full face type protective mask |
| CN103813833A (en) * | 2011-08-01 | 2014-05-21 | 3M创新有限公司 | Respiratory assembly including latching mechanism |
| KR101524219B1 (en) * | 2014-12-16 | 2015-05-29 | 삼공물산 주식회사 | Combination structure between mask and canister and gas mask having the same |
| USD779674S1 (en) | 2015-02-27 | 2017-02-21 | 3M Innovative Properties Company | Filter element having a connector |
| USD786443S1 (en) | 2015-02-27 | 2017-05-09 | 3M Innovative Properties Company | Filter element |
| US9700743B2 (en) | 2012-07-31 | 2017-07-11 | 3M Innovative Properties Company | Respiratory assembly including latching mechanism |
| USD792959S1 (en) | 2015-02-27 | 2017-07-25 | 3M Innovative Properties Company | Filter element having a pattern |
| US10576313B2 (en) | 2016-03-09 | 2020-03-03 | Shigematsu Works Co., Ltd. | Detachable connector |
| KR200491319Y1 (en) * | 2018-10-04 | 2020-03-19 | 우제정 | A sanitary mask with blowing |
| US11311752B2 (en) | 2015-02-27 | 2022-04-26 | 3M Innovative Properties Company | Flexible filter element having an end outlet |
-
1996
- 1996-01-17 JP JP8023321A patent/JP2763870B2/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103813833A (en) * | 2011-08-01 | 2014-05-21 | 3M创新有限公司 | Respiratory assembly including latching mechanism |
| JP2013085845A (en) * | 2011-10-20 | 2013-05-13 | Koken Ltd | Full face type protective mask |
| US9700743B2 (en) | 2012-07-31 | 2017-07-11 | 3M Innovative Properties Company | Respiratory assembly including latching mechanism |
| KR101524219B1 (en) * | 2014-12-16 | 2015-05-29 | 삼공물산 주식회사 | Combination structure between mask and canister and gas mask having the same |
| USD779674S1 (en) | 2015-02-27 | 2017-02-21 | 3M Innovative Properties Company | Filter element having a connector |
| USD786443S1 (en) | 2015-02-27 | 2017-05-09 | 3M Innovative Properties Company | Filter element |
| USD792959S1 (en) | 2015-02-27 | 2017-07-25 | 3M Innovative Properties Company | Filter element having a pattern |
| USD886273S1 (en) | 2015-02-27 | 2020-06-02 | 3M Innovative Properties Company | Filter element having a pattern |
| US11311752B2 (en) | 2015-02-27 | 2022-04-26 | 3M Innovative Properties Company | Flexible filter element having an end outlet |
| US11738218B2 (en) | 2015-02-27 | 2023-08-29 | 3M Innovative Properties Company | Flexible filter element having an end outlet |
| US10576313B2 (en) | 2016-03-09 | 2020-03-03 | Shigematsu Works Co., Ltd. | Detachable connector |
| KR200491319Y1 (en) * | 2018-10-04 | 2020-03-19 | 우제정 | A sanitary mask with blowing |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2763870B2 (en) | 1998-06-11 |
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