JPS6216550Y2 - - Google Patents
Info
- Publication number
- JPS6216550Y2 JPS6216550Y2 JP1980093718U JP9371880U JPS6216550Y2 JP S6216550 Y2 JPS6216550 Y2 JP S6216550Y2 JP 1980093718 U JP1980093718 U JP 1980093718U JP 9371880 U JP9371880 U JP 9371880U JP S6216550 Y2 JPS6216550 Y2 JP S6216550Y2
- Authority
- JP
- Japan
- Prior art keywords
- closure
- box
- opening
- conduit
- annular body
- 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.)
- Expired
Links
- 239000012530 fluid Substances 0.000 claims description 7
- 239000003566 sealing material Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011022 operating instruction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Landscapes
- Pipe Accessories (AREA)
Description
【考案の詳細な説明】
本考案は、都市ガス導管などの流体輸送導管に
密封状態に固定支持可能な開閉シヤツター付サド
ルに対して密封状態で固定連結可能なボツクスを
連設し、前記サドル及びボツクスを前記導管に固
定連結した状態において、前記シヤツターにより
開閉される開口を通して、前記導管に穿設された
孔に対する閉子を不断流状態で開閉操作するため
の装置に関する。
導管に穿設した孔に対し、不断流状態（導管に
流体を流動させたままの状態）で閉子を装着、離
脱するに当つて、従来では第４図に示すように前
記シヤツターを開いた直後に穿設孔に仮プラグし
た上、サドルを取外してその代わりに樹脂袋４０
を導管Ｐに密着する状態でバンド４１止着し、袋
４０の天側ゴム板４２から腕をさし入れて仮プラ
グ４３を外したのち閉子４４を装着し、又、装着
閉子４４を離脱して閉子密封度の測定やバイパス
管仮設等の所要の作業を行なう場合にも、袋４０
をバンド４１止着し、ゴム板４２から腕をさし入
れて閉子４４を仮プラグ４３と交換し、袋４０を
外したのちサドルを取付けていた。しかし、この
場合、仮プラグ、サドルの取外し、袋のセツトバ
ンド締め、袋の取外し等々、手間が大変である上
に、仮プラグ、閉子を片手で操作しなければなら
ないので作業性が著しく悪く、又、袋の破孔等に
よる漏洩の可能性もあつた。
本考案が解決しようとする技術的課題は、穿孔
時に使用したシヤツター付サドルを導管に取付け
たまま利用し、導管に穿孔された孔に閉子を着脱
する操作を、不断流状態で迅速、確実かつ容易に
なしうるとともに、不断流状態で実行される関連
作業を安全かつ効率良く行うことがらできるよう
にすることである。
上記技術的課題を解決するために講じた技術的
手段は、
閉子はその外周面に、穿設孔にタツプ立てされ
た雌ねじに螺合可能な雄ねじを有するとともに、
このボツクスに、前記閉子に対して着脱自在で、
かつ、装着した閉子を前記ボツクスに保持された
開位置と前記穿設孔に装着された閉位置との二位
置間に亘つて開口を通して移動操作自在な操作具
を密封状態に装着するとともに、前記操作具は前
記閉子に対して直接接当する内軸と、前記閉子の
雄ねじの一部に螺合する環状体から突設の外筒軸
とを備え、前記外筒軸を前記内軸に相対回転可能
に外套させることである。
上記技術的手段は、次のように作用する。
閉子は外周面に穿設孔の雌ねじと螺合可能な雄
ねじを有し、その雄ねじの１部に螺合する環状体
から突設の外筒軸と、閉子に直接接当し外筒軸に
内嵌された内軸とを備え、開位置と閉位置の二位
置間に亘つて移動操作自在な操作具を、ボツクス
に密封状態に装着してあるから、サドル及びボツ
クスを導管に固定連結した状態において、流体が
外部へ漏洩しない不断流状態を現出することが容
易にでき、この状態において、内軸に接当した閉
子を操作具の外筒軸と一体の環状体に螺合させ、
この状態でボツクスに保持された開位置に移動操
作できる。また上記の状態ですなわち閉子を環状
体に螺合させたまた開口を通し移動操作し閉子が
導管の穿設孔に近接した位置で、内軸を閉子に押
付けつつ外筒軸を前回とは逆方向に回転すること
により閉子を操作具の環状体から取外し、閉子の
みを穿設孔に装着して閉位置を現出することがで
きる。閉子を閉位置から開位置に戻すには上記と
逆の同様な操作をすれば良い。
従つて、本考案は次の効果を奏する。
上記に説明したごとく、流体が外部へ漏洩しな
い不断流状態を容易に現出することができ、この
状態において、閉子を操作具の外筒軸に一体の環
状体に螺合させ、内軸と共に移動操作して開位置
においては閉子をボツクスに保持でき、閉位置に
おいては閉子のみを穿設孔に装着して操作具を閉
子と分離することができるから、閉子を導管の穿
設孔に着脱する作業において、閉位置で、閉子を
穿設孔に確実に装着することがらでき、この位置
以外の途中及び開位置では閉子を操作具に確実に
保持させるから、閉子はボツクスやサドルの中に
落込むおそれはなく、従つて穿設孔の開閉作業に
支障を来すことはなくなつた。また、ボツクスを
サドルに連結したままの状態でこのボツクスを利
用してそれに閉子密封度の測定具やバイパス管を
接続する関連作業も操作具により閉子を離脱しシ
ヤツターを開け閉めするだけで行なうことができ
るに至り、従つて、穿孔時に使用したシヤツター
付サドルをそのまま利用し、導管の穿設孔に閉子
を着脱する操作を不断流状態で迅速、確実かつ容
易になしうるとともに、不断流状態で実行される
関連作業を安全かつ効率良く行うことができるに
至つた。
次に、本考案の実施例を図面に基づいて説明す
ると、１は、開閉シヤツター１７付きのサドル１
８の上端筒部１９に対して、この筒部１９に嵌着
のシール材２０に圧着する状態で嵌合され、かつ
ボルト２１……を介してサドル１８に固定された
ボツクスで、このボツクス１は上板部に立上げ筒
部２と立下げ筒部３とを一体連設するとともに、
筒部３内方において上板部下面にシール材４を嵌
着している。５はボツクス１内に収納された閉子
で、その外周に導管Ｐの穿設孔P1の内周雌ねじ２
２に対するテーパー雄ねじ６を形成している。７
は、前記閉子５に対する操作具で、閉子５に対し
てその先端部が直接接当する内軸８と、閉子５の
雄ねじ６の一部に螺合する環状体９から突設の筒
軸１０とを相対回転可能に内外套嵌したものであ
る。１１は操作具７の回転と摺動とを許す状態で
立上げ筒部２に螺合した蓋体で、蓋体１１の下方
において立上げ筒部２の内側に、外筒軸１０との
間を密封するパツキン１２を嵌着している。又、
環状体９は立下げ筒部３に対して螺合保持されて
いて、この螺合締付けにより環状体９の上面が前
記のシール材４に圧接する。１３，１４は夫々、
内軸８と外筒軸１０の上端に付設された回転操作
用の握りで、大径握り１４には内軸８との間を内
軸８外周に形成のねじとの咬合により密封するナ
ツト１５が付設されている。
１６はボツクス１の側面に付設された開閉バル
ブで、これに閉子５の密封度測定具やバイパス管
を接続するようになつている。
サドル１８において、２３，２３はシヤツター
１７との密封性を確保するためのシール材、２
４，２４′は小径導管と大径導管への接当用環状
部で、両者の下端間にタイヤ仕様の補強布入りシ
ール用ゴム膜２５を固定し、それによつて囲まれ
た空間２６内にゴム膜２５膨張又は緊張用流体の
導入口２７が連通している。２８，２８はサドル
１８の張出し部２９，２９に係止されたボルト・
ナツト、３０は両ボルト・ナツト間に渡されたチ
エーンで導管Ｐ外周面に巻付け固定される。
操作要領は次の通り。
導管Ｐに孔P1をタツピング穿設してのち、シヤ
ツター１７を閉じて穿孔機を取外し、サドル１８
にボツクス１を取付ける。この作業を、第２図の
ように新管と取り換えるべき導管部分P′の両側部
分で行ない、両ボツクス１，１のバルブ１６，１
６間に亘つて、バイパス管３１を仮設的に接続す
る。次いてボツクス１，１の内方において適宜手
段により遮断用バツグ３２，３２を入れて導管Ｐ
を遮断し、導管部分P′を切断撤去したあと新管を
接続する。次いでバツグ３２，３２を取除きその
あとを閉塞処理したのちにおいて、操作具７を操
作して閉子５を穿設孔P1にプラグする。この操作
は、シヤツター１７を開けたのち両握り１３，１
４を同時回転して環状体９を筒部３から外したの
ちシヤツター１７開により現出されるサドル１８
の口ａを通して下方へ押込んで再び両握り１３，
１４を同時回転して孔P1に閉子５を螺合締結す
る。その後バルブ１６に気密度測定具を接続し、
閉子５のプラグ状態を確認し、良ければ、小径握
り１３を押して内軸８で閉子５の回り止めをした
状態で大径握り１４のみを逆転して環状体９をプ
ラグ５から外したのち操作具７全体を引上げての
ちシヤツター１７を閉め、ボツクス１およびサド
ル１８を導管Ｐから取外す。
第３図は応用例を示し、ボツクス１のボール軸
受３３に、筒体３４を、その下端球状部において
揺動自在に連結し、この筒体３４に操作具７を装
着したもので、閉子５を孔P1に合致させやすい。
そしてシール材３５，３６により大なる密封性能
が得られる。 [Detailed description of the invention] The present invention includes a box that can be fixedly connected in a sealed manner to a saddle with an opening/closing shutter that can be fixedly supported in a fluid transport pipe such as a city gas pipe in a sealed state. The present invention relates to a device for opening and closing a closure for a hole drilled in the conduit in a non-flow state through an opening opened and closed by the shutter in a state where a box is fixedly connected to the conduit. Conventionally, when attaching and removing a shutter from a hole drilled in a conduit in a non-flow state (with fluid flowing through the conduit), the shutter was opened as shown in Fig. 4. Immediately after temporarily plugging the drilled hole, remove the saddle and replace it with a resin bag 40.
Attach the band 41 so that it is in close contact with the conduit P, insert your arm through the top rubber plate 42 of the bag 40, remove the temporary plug 43, and then attach the closure 44. The bag 40 can also be removed to perform necessary work such as measuring the sealing degree of the closure or temporarily installing a bypass pipe.
The rider attached the saddle to the band 41, inserted his arm through the rubber plate 42, replaced the closure 44 with a temporary plug 43, removed the bag 40, and then attached the saddle. However, in this case, removing the temporary plug and saddle, tightening the bag's set band, and removing the bag is very time-consuming, and work efficiency is extremely poor because the temporary plug and closure must be operated with one hand. There was also the possibility of leakage due to holes in the bag. The technical problem that this invention aims to solve is to use the saddle with a shutter that was used when drilling the hole while it is still attached to the conduit, and to quickly and reliably attach and detach the shutter to the hole drilled in the conduit without interrupting the flow. The object of the present invention is to enable the related work to be performed safely and efficiently in a state where the flow is not interrupted. The technical means taken to solve the above technical problem is that the closure has a male thread on its outer circumferential surface that can be screwed into a female thread tapped into a drilled hole,
The box is detachably attached to the closure,
and an operating tool that can be freely moved through the opening between two positions, an open position where the attached closure is held in the box and a closed position where it is attached to the perforated hole, is attached in a sealed state; The operating tool includes an inner shaft that directly contacts the closure, and an outer cylindrical shaft protruding from an annular body that is threaded into a part of the male thread of the closure, and the outer cylindrical shaft is connected to the inner shaft. This is to make the shaft rotatable relative to the shaft. The above technical means works as follows. The closure has a male thread on its outer circumferential surface that can be screwed into the female thread of the drilled hole, an outer cylindrical shaft protruding from an annular body that is threaded into a part of the male thread, and an outer cylinder shaft that is in direct contact with the closure. The saddle and box are fixed to the conduit because the operating tool, which has an inner shaft fitted inside the shaft and can be moved freely between two positions, an open position and a closed position, is attached to the box in a sealed state. In the connected state, it is easy to create an uninterrupted flow state in which the fluid does not leak to the outside, and in this state, the closure that is in contact with the inner shaft is screwed into the annular body that is integrated with the outer cylindrical shaft of the operating tool. match,
In this state, the box can be moved to the open position held by the box. In addition, in the above state, i.e., by screwing the closure into the annular body and moving the closure through the opening, at a position where the closure is close to the hole in the conduit, press the inner shaft against the closure and move the outer cylindrical shaft from the previous time. By rotating the closure in the opposite direction, the closure can be removed from the annular body of the operating tool, and only the closure can be installed in the drilled hole to reveal the closed position. To return the closure from the closed position to the open position, the same operation in reverse as above may be performed. Therefore, the present invention has the following effects. As explained above, it is possible to easily create an uninterrupted flow state in which the fluid does not leak to the outside, and in this state, the closure is screwed into the annular body that is integrated with the outer cylindrical shaft of the operating tool, and the inner shaft In the open position, the closure can be held in the box by moving the closure, and in the closed position, only the closure can be attached to the drilled hole and the operating tool can be separated from the closure. In the work of attaching and detaching to and from a drilled hole, the closing member can be securely attached to the drilled hole in the closed position, and the closing member is securely held by the operating tool in the middle of the way other than this position and in the open position. There is no danger that the child will fall into the box or saddle, and therefore there is no longer a problem with the opening and closing work of the drilled hole. In addition, related work such as connecting a closure seal measurement device or a bypass pipe to the box while it is still connected to the saddle can be done by simply detaching the closure using the operating tool and opening and closing the shutter. Therefore, by using the saddle with a shutter that was used for drilling, it is possible to quickly, reliably, and easily attach and detach the closure to and from the hole in the conduit without any interruption in flow, and it is possible to do so without interruption. It has now become possible to perform related work safely and efficiently in a fluid state. Next, an embodiment of the present invention will be described based on the drawings. 1 is a saddle 1 with an opening/closing shutter 17;
The box 1 is fitted into the upper end cylindrical part 19 of the cylindrical part 8 in a state where it is pressed into the sealing material 20 fitted into the cylindrical part 19, and is fixed to the saddle 18 via bolts 21. The rising cylinder part 2 and the falling cylinder part 3 are integrally connected to the upper plate part, and
A sealing material 4 is fitted on the lower surface of the upper plate inside the cylindrical portion 3. 5 is a closure housed in the box 1 , and on its outer periphery there is a female thread 2 on the inner periphery of the hole P 1 for the conduit P.
A tapered male thread 6 relative to 2 is formed. 7
is an operating tool for the closure 5, which includes an inner shaft 8 whose tip is in direct contact with the closure 5, and an annular body 9 that protrudes from a part of the male screw 6 of the closure 5. The cylinder shaft 10 is fitted inside and outside so that it can rotate relative to the cylinder shaft 10. Reference numeral 11 denotes a lid body screwed onto the upright cylinder part 2 in a state that allows the operation tool 7 to rotate and slide. A gasket 12 is fitted to seal it. or,
The annular body 9 is screwed into and held by the vertical tube portion 3, and the upper surface of the annular body 9 is brought into pressure contact with the sealing material 4 by this screwing and tightening. 13 and 14 are respectively,
A grip for rotating operation is attached to the upper end of the inner shaft 8 and the outer cylindrical shaft 10, and the large-diameter grip 14 has a nut 15 that seals between the inner shaft 8 and the inner shaft 8 by engagement with a screw formed on the outer periphery of the inner shaft 8. is attached. Reference numeral 16 denotes an on-off valve attached to the side surface of the box 1 , to which a seal measuring device for the closure 5 and a bypass pipe are connected. In the saddle 18 , 23, 23 are a sealing material for ensuring sealing performance with the shutter 17;
4 and 24' are annular parts for contacting the small-diameter conduit and the large-diameter conduit, and between the lower ends of the two, a rubber membrane 25 for sealing with reinforcing cloth of tire specifications is fixed. The rubber membrane 25 communicates with an inlet 27 for inflation or tensioning fluid. 28, 28 is the saddle
The bolts and bolts secured to the overhanging parts 29 and 29 of 18
The nut 30 is wound and fixed around the outer peripheral surface of the conduit P by a chain passed between both bolts and nuts. The operating instructions are as follows. After tapping the hole P1 in the conduit P, close the shutter 17, remove the drilling machine, and remove the saddle 18 .
Attach box 1 to. As shown in Fig. 2, perform this work on both sides of the conduit section P' to be replaced with a new pipe, and remove the valves 16 and 1 of both boxes 1 and 1 .
The bypass pipe 31 is temporarily connected for six hours. Next, the blocking bags 32, 32 are placed inside the boxes 1 , 1 by appropriate means, and the conduit P is closed.
After cutting and removing the conduit section P′, connect the new pipe. Next, after the bags 32, 32 are removed and the remaining portions are closed, the operating tool 7 is operated to plug the closure 5 into the drilled hole P1 . This operation is performed after opening the shutter 17 and
After removing the annular body 9 from the cylindrical part 3 by simultaneously rotating the parts 4 and 3, the saddle 18 is exposed by opening the shutter 17.
Push it downward through the mouth a and hold both grips 13 again.
14 are simultaneously rotated to screw the closure 5 into the hole P1 . After that, connect the airtightness measuring device to the valve 16,
Check the plug condition of the closure 5, and if it is good, push the small diameter grip 13 to prevent the closure 5 from rotating with the inner shaft 8, and then reverse only the large diameter grip 14 to remove the annular body 9 from the plug 5. Afterwards, the entire operating tool 7 is pulled up, the shutter 17 is closed, and the box 1 and saddle 18 are removed from the conduit P. FIG. 3 shows an application example in which a cylinder 34 is swingably connected to the ball bearing 33 of the box 1 at its lower spherical part, and an operating tool 7 is attached to the cylinder 34. 5 is easy to match with hole P1 .
Great sealing performance can be obtained by the sealing materials 35 and 36.
図面は本考案に係る導管閉子の開閉操作装置の
実施例を示し、第１図は断面図、第２図は作業要
領説明図、第３図は応用例の断面図、第４図は従
来手段の説明図である。
１……ボツクス、４……シール材、５……閉
子、６……雄ねじ、７操作具、８……内軸、９…
…環状体、１０……外筒軸、１６……開閉バル
ブ、１７……シヤツター、１８……サドル、２２
……雌ねじ、ａ……開口、Ｐ……導管、P1……
孔。
The drawings show an embodiment of the opening/closing operation device for a conduit closure according to the present invention, with FIG. 1 being a sectional view, FIG. It is an explanatory diagram of means. 1 ...Box, 4...Sealing material, 5...Closer, 6...Male thread, 7 Operating tool, 8...Inner shaft, 9...
... Annular body, 10 ... Outer cylinder shaft, 16 ... Opening/closing valve, 17 ... Shutter, 18 ... Saddle, 22
...Female thread, a...opening, P...conduit, P 1 ...
Hole.
Claims (1)
開閉シヤツター１７付サドル１８に対して密封
状態で固定連結可能なボツクス１を連設し、前
記サドル１８及びボツクス１を前記導管Ｐに固
定連結した状態において、前記シヤツター１７
により開閉される開口ａを通して、前記導管Ｐ
に穿設された孔P1に対する閉子５を不断流状態
で開閉操作するための装置において、前記閉子
５はその外周面に、前記穿設孔P1にタツプ立て
された雌ねじ２２に螺合可能な雄ねじ６を有す
るとともに、このボツクス１に、前記閉子５に
対して着脱自在で、かつ、装着した閉子５を前
記ボツクス１に保持された開位置と前記穿設孔
P1に装着された閉位置との二位置間に亘つて前
記開口ａを通して移動操作自在な操作具７を密
封状態に装着するとともに、前記操作具７は、
前記閉子５に対して直接接当する内軸８と、前
記閉子５の雄ねじ６の一部に螺合する環状体９
から突設の外筒軸１０とを備え、前記外筒軸１
０を前記内軸８に相対回転可能に外套させてあ
る事を特徴とする導管閉子の開閉操作装置。 前記環状体９は、前記閉子５の開放方向への
移動終端側において前記ボツクス１に対して螺
合保持可能に構成されている実用新案登録請求
の範囲第項に記載の導管閉子の開閉操作装
置。 前記ボツクス１は、前記環状体９の螺合締付
けにより環状体９との間を密封するシール材４
を備えている実用新案登録請求の範囲第項に
記載の導管閉子の開閉操作装置。[Claims for Utility Model Registration] A box 1 that can be fixedly connected in a sealed state to a saddle 18 with an opening/closing shutter 17 that can be fixedly supported in a sealed state is provided in a fluid transport conduit P, and the saddle 18 and the box 1 are connected to each other in a sealed state. In the state fixedly connected to the conduit P, the shutter 17
The conduit P is passed through the opening a opened and closed by
In a device for opening and closing a closure 5 with respect to a hole P 1 drilled in a hole P 1 in a non-flow state, the closure 5 has a female thread 22 tapped into the hole P 1 on its outer circumferential surface. It has a male screw 6 that can be connected to the box 1 , and can be attached to and detached from the closure 5 at will, and the attached closure 5 can be held in the open position in the box 1 and in the drilled hole.
An operating tool 7 , which can be freely moved and operated through the opening a, is mounted in a sealed state between two positions, including a closed position mounted on P1 , and the operating tool 7 is
an inner shaft 8 that directly contacts the closure 5; and an annular body 9 that is screwed into a part of the male thread 6 of the closure 5.
an outer cylinder shaft 10 protruding from the outer cylinder shaft 1;
1. An opening/closing operation device for a conduit closure, characterized in that a cylindrical shaft 0 is fitted around the inner shaft 8 so as to be rotatable relative to the inner shaft 8. The annular body 9 is configured to be able to be screwed and held onto the box 1 at the end of movement of the closure 5 in the opening direction. Operating device. The box 1 is provided with a sealing material 4 that seals between the annular body 9 and the annular body 9 by screwing and tightening the annular body 9.
An opening/closing operation device for a conduit closure according to claim 1 of the utility model registration claim, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980093718U JPS6216550Y2 (en) | 1980-07-02 | 1980-07-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980093718U JPS6216550Y2 (en) | 1980-07-02 | 1980-07-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5716693U JPS5716693U (en) | 1982-01-28 |
| JPS6216550Y2 true JPS6216550Y2 (en) | 1987-04-25 |
Family
ID=29455656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980093718U Expired JPS6216550Y2 (en) | 1980-07-02 | 1980-07-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6216550Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6434182U (en) * | 1987-08-26 | 1989-03-02 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51336A (en) * | 1974-06-19 | 1976-01-06 | Olympus Optical Co | DOJIROKUONSATSUEISOCHI |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6039591Y2 (en) * | 1978-06-27 | 1985-11-27 | 矢野技研株式会社 | Water control valve mounting structure |
-
1980
- 1980-07-02 JP JP1980093718U patent/JPS6216550Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51336A (en) * | 1974-06-19 | 1976-01-06 | Olympus Optical Co | DOJIROKUONSATSUEISOCHI |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5716693U (en) | 1982-01-28 |
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