JPH0332621Y2 - - Google Patents
Info
- Publication number
- JPH0332621Y2 JPH0332621Y2 JP1719585U JP1719585U JPH0332621Y2 JP H0332621 Y2 JPH0332621 Y2 JP H0332621Y2 JP 1719585 U JP1719585 U JP 1719585U JP 1719585 U JP1719585 U JP 1719585U JP H0332621 Y2 JPH0332621 Y2 JP H0332621Y2
- Authority
- JP
- Japan
- Prior art keywords
- shield excavator
- packing
- pipe
- impermeable membrane
- shaft
- 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
- 238000012856 packing Methods 0.000 claims description 29
- 239000012528 membrane Substances 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000010276 construction Methods 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 description 10
- 239000012530 fluid Substances 0.000 description 7
- 239000003673 groundwater Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000010865 sewage Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は立坑のシールド掘削機発進坑口に装着
する坑口パツキンに関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a wellhead gasket that is attached to the shaft opening of a shield excavator.
（考案の背景）
近年、下水道管の敷設において、地盤を開削す
ることなくシールド工法や推進工法により管路を
築造することが行われている。(Background of the idea) In recent years, when laying sewer pipes, the shield method or the propulsion method has been used to construct sewer pipes without excavating the ground.
シールド工法は掘削機によつて地盤を掘削し、
掘削機の後方部においてセグメントを管状に組立
てる作業を順次行いながら管路を形成するのであ
り、推進工法は掘削機に後続してヒユーム管を接
続し、立坑内に配設した推進ジヤツキによつてヒ
ユーム管の後端を押圧しながら掘削機により土砂
を掘削してヒユーム管を地盤中に圧入することに
より管路を形成するものである。 The shield method excavates the ground using an excavator,
The pipeline is formed by sequentially assembling the segments into a tubular shape at the rear of the excavator, and the propulsion method connects the hump pipe after the excavator and uses a propulsion jack installed in the shaft. A conduit is formed by excavating earth and sand with an excavator while pressing the rear end of the hume pipe and press-fitting the hume pipe into the ground.
しかしながら、このようにして形成された管路
は、一定寸法のセグメント或いはヒユーム管を順
次接合してなるものであるから、地下水の多い地
盤の場合では管路供用時にその接合部から地下水
が管路内に浸入し、管路内には流通する実際の下
水流量よりも多く流れることになつて下水処理場
における処理量が２〜３割も増大するという問題
点がある。 However, since the pipes formed in this way are made by sequentially joining segments of a certain size or humid pipes, in the case of ground with a lot of groundwater, groundwater may flow from the joints into the pipe when the pipe is in service. There is a problem in that the amount of sewage that is processed in the sewage treatment plant increases by 20 to 30% because the amount of sewage that flows through the pipes is greater than the actual amount of sewage flowing through the pipes.
このため、筒状の不透水膜を長さ方向に収縮さ
せた状態でシールド掘削機内に配設し、シールド
掘削機が掘進するに従つてシールド掘削機後端か
ら不透水膜を繰り出し、管体外周を被覆すること
が行われるようになつた。 For this reason, a cylindrical impermeable membrane is placed inside the shield excavator in a state in which it is contracted in the length direction, and as the shield excavator excavates, the impermeable membrane is paid out from the rear end of the shield excavator and is removed from the pipe body. Covering the surrounding area began to be practiced.
一方、発進立坑からのシールド掘削機の発進時
において、立坑壁の発進口に止水パツキンを設け
てその止水パツキンをシールド掘削機外周面や下
水道管の外周面に密着させて地下水が立坑内に浸
入するのを防止している。 On the other hand, when the shield excavator starts from the starting shaft, a water-stop gasket is provided at the starting port of the shaft wall, and the water-stop gasket is brought into close contact with the outer circumferential surface of the shield excavator and the outer circumferential surface of the sewer pipe to prevent groundwater from entering the shaft. prevents it from entering.
しかしながら、上述のように管体を筒状シート
等の不透水膜で被覆する時に、その筒状不透水膜
の一端を立坑内に固定する必要があるが、この場
合、止水パツキンと管体との間に不透水膜が位置
し、該不透水膜は管体が前進するときにこの管体
の外周面に摺接して摩耗破損するという問題点が
ある。 However, when covering the pipe with an impermeable membrane such as a cylindrical sheet as described above, it is necessary to fix one end of the cylindrical impermeable membrane inside the shaft. There is a problem that an impermeable membrane is located between the tube and the tube, and the impermeable membrane comes into sliding contact with the outer circumferential surface of the tube when the tube moves forward, causing wear and tear.
（考案の目的）
本考案はこのような問題点に鑑みてなされたも
ので、発進坑口において、不透水膜が管体外周面
に摺接しないようにした坑口パツキンを提供する
ものである。(Purpose of the invention) The present invention was made in view of the above-mentioned problems, and provides a wellhead packing that prevents the impermeable membrane from coming into sliding contact with the outer peripheral surface of the pipe at the starting wellhead.
（考案の構成）
上記目的を達成するために、本考案の坑口パツ
キンは、シールド掘削機に、該シールド掘削機の
外径よりも外径が小さく形成されたヒユーム管等
の管体を後続させてシールド掘削機の後部に格納
した筒状不透水膜を後続管体に被覆する工法にお
ける立坑の発進坑口パツキンにおいて、坑口周辺
に取り付けたシールド掘削機外周面に圧接させる
パツキンとシールド掘削機の通過直前に取り付け
て後続管体の外周面に圧接させるパツキンとから
なり、これらのパツキン間の空間部に泥水を注入
するように構成したものである。(Structure of the invention) In order to achieve the above object, the wellhead packing of the invention includes a shield excavator followed by a pipe body such as a hume pipe formed with an outer diameter smaller than the outer diameter of the shield excavator. In the method of coating the trailing pipe body with a cylindrical impermeable membrane stored at the rear of the shield excavator, the passage of the shield excavator and the seal that is pressed into contact with the outer peripheral surface of the shield excavator attached around the shaft entrance. It consists of a gasket that is attached immediately before the pipe and is brought into pressure contact with the outer circumferential surface of the succeeding tube, and is configured so that muddy water is injected into the space between these gaskets.
（実施例の説明）
本考案の実施例を図面について説明すると、１
は発進立坑、２は立坑壁、３は地盤で、立坑壁に
は発進坑口４が開設してある。(Explanation of Embodiments) The embodiments of the present invention will be explained with reference to the drawings.
is a starting shaft, 2 is a shaft wall, 3 is the ground, and a starting shaft opening 4 is opened in the shaft wall.
５はシールド掘削機で、そのスキンプレート後
部にビニールシート等よりなる長尺の筒状不透水
膜６を長さ方向に収縮させて格納した格納室７を
設けてあり、該格納室７の後端を後方に開口させ
て不透水膜６の出口７ａに形成してある。８はシ
ールド掘削機５に後続するセグメント或いはヒユ
ーム管等の管体である。 Reference numeral 5 denotes a shield excavator, and a storage chamber 7 is provided at the rear of the skin plate in which a long cylindrical impermeable membrane 6 made of a vinyl sheet or the like is contracted in the length direction. The end is opened rearward and is formed at the outlet 7a of the impermeable membrane 6. Reference numeral 8 denotes a segment or a pipe body such as a hump pipe that follows the shield excavator 5.
９は坑口４の内周面に周設し、固定した断面半
円のリング状パツキンで、ゴム等の弾性材料から
形成され、内部側からの流体圧により内径方向に
膨脹するものである。 Reference numeral 9 denotes a fixed ring-shaped packing having a semicircular cross section that is installed around the inner peripheral surface of the wellhead 4, and is made of an elastic material such as rubber, and expands in the inner diameter direction by fluid pressure from the inside.
１０は立坑壁２内にその先端部を埋設した圧力
水或いは圧力空気供給パイプで、先端開口部をパ
ツキン９に連通させると共に立坑１側からバルブ
１１を介して圧力流体を供給するものである。 Reference numeral 10 denotes a pressure water or pressurized air supply pipe whose tip end is buried in the shaft wall 2, whose tip opening communicates with the packing 9 and which supplies pressurized fluid from the shaft 1 side via a valve 11.
１２は坑口４の立坑１側周面に周方向に適宜間
隔毎に埋込んだボルトで、内径が坑口４の内径に
略等しいリング状の樹脂性添板１７、同じく内径
が坑口４の内径に略等しい断面コ字状のリング部
材１３を坑口４に合わせて固定するものであり、
さらに環状に形成した弾性を有する樹脂性の断面
舌状パツキン１４をリング状押さえ板１５及びナ
ツト１６によつてボルト１２に固定してある。 Reference numeral 12 denotes bolts embedded in the circumferential surface of the shaft 1 side of the mine entrance 4 at appropriate intervals in the circumferential direction, and a ring-shaped resin plate 17 whose inside diameter is approximately equal to the inside diameter of the mine entrance 4; A ring member 13 having a substantially equal U-shaped cross section is fixed in alignment with the wellhead 4,
Further, an annular elastic cross-section tongue-shaped packing 14 made of resin is fixed to the bolt 12 by a ring-shaped pressing plate 15 and a nut 16.
リング状パツキン９の内径は収縮した状態では
シールド掘削機５の外径に略等しく、パイプ１０
からの流体を該パツキン９に注入した時に膨脹し
てシールド掘削機５に圧接し、止水効果を奏す
る。又、このパツキン９内の流体を抜くと管体８
の外周面との間に隙間が生じる。 The inner diameter of the ring-shaped packing 9 is approximately equal to the outer diameter of the shield excavator 5 in the contracted state, and the inner diameter of the ring-shaped packing 9 is approximately equal to the outer diameter of the shield excavator 5.
When fluid is injected into the packing 9, it expands and comes into pressure contact with the shield excavator 5, producing a water-stopping effect. Also, when the fluid inside this gasket 9 is removed, the pipe body 8
A gap is created between the outer peripheral surface of the
管体８はシールド掘削機５の後端に嵌合するも
ので、シールド掘削機５の外径よりもその外径を
小径に形成してある。なお、管体８は前述したヒ
ユーム管やセグメントであつてもシールド運転機
材を設置する後続管であつてもよい。 The tubular body 8 fits into the rear end of the shield excavator 5, and has an outer diameter smaller than the outer diameter of the shield excavator 5. The pipe body 8 may be the above-mentioned hume pipe or segment, or may be a subsequent pipe in which shield operating equipment is installed.
前記舌状パツキン１４の内径は管体８の外径よ
りも小径である。 The inner diameter of the tongue-shaped packing 14 is smaller than the outer diameter of the tubular body 8.
１８はリング部材１３の適所にその開口端を該
リング部材１３の内周側に連通させて取りつけた
泥水注入パイプで、バルブ１９を設けてある。 Reference numeral 18 denotes a slurry water injection pipe which is attached to a suitable position of the ring member 13 with its open end communicating with the inner peripheral side of the ring member 13, and is provided with a valve 19.
以上のように構成した坑口パツキンの使用例を
述べると、立坑１のシールド掘削機発進予定位置
の壁２に開設した坑口内周面にパツキン９を装着
したのち、スキンプレートの後部内周に不透水膜
６を格納したシールド掘削機５を坑口４に挿入
し、パイプ１０から圧力空気あるいは水等の流体
を断面半円のパツキン９内に注入してシールド掘
削機５の外周にパツキン９の内周面を圧接させる
ことにより立坑内への地下水の流入を防止する。 An example of how to use the wellhead gasket configured as described above is that after the gasket 9 is attached to the inner circumferential surface of the wellhead opened on the wall 2 of the shaft 1 where the shield excavator is scheduled to start, the gasket 9 is attached to the rear inner circumference of the skin plate. The shield excavator 5 housing the permeable membrane 6 is inserted into the wellhead 4, and fluid such as pressurized air or water is injected from the pipe 10 into the packing 9, which has a semicircular cross section, so that the inside of the packing 9 is coated around the outer periphery of the shield excavator 5. By pressurizing the surrounding surface, groundwater is prevented from flowing into the shaft.
この状態でシールド掘削機５を前進させ、該シ
ールド掘削機５の後端がパツキン９の近傍に達し
たときにその掘進を一時中止する。この時、シー
ルド掘削機５の後端部の格納室７から不透水膜６
の端部が少し出ている状態になつてあり、この不
透水膜６を引き出して立坑壁２に植設しておいた
ボルト１２に添板１７と共に挿通したのちリング
部材１３をボルト１２に取りつけて添板１７とリ
ング部材１３とで不透水膜６の端部を挟着する。 In this state, the shield excavator 5 is advanced, and when the rear end of the shield excavator 5 reaches the vicinity of the packing 9, the excavation is temporarily stopped. At this time, the impermeable membrane 6 is removed from the storage chamber 7 at the rear end of the shield excavator 5.
The impermeable membrane 6 is pulled out and inserted into the bolt 12 installed in the shaft wall 2 along with the splint 17, and then the ring member 13 is attached to the bolt 12. Then, the end portion of the water-impermeable membrane 6 is sandwiched between the splice plate 17 and the ring member 13.
なお、添板１７、不透水膜６の端部、リング部
材１３、舌状パツキン１４の外周部、押さえ板１
５にはボルト１２に合致するボルト挿通孔（図示
せず）を穿設してある。 In addition, the splint 17, the end of the impermeable membrane 6, the ring member 13, the outer periphery of the tongue-shaped packing 14, and the presser plate 1
5 is provided with a bolt insertion hole (not shown) that matches the bolt 12.
リング部材１３の取り付け後、さらに舌状パツ
キン１４と押さえ板１５を順次ボルト１２に取り
付け、ナツト１５をボルト１２に螺締する。 After attaching the ring member 13, the tongue-shaped gasket 14 and the pressing plate 15 are sequentially attached to the bolt 12, and the nut 15 is screwed onto the bolt 12.
次いで、管体８を舌状パツキン１４の内周部に
摺接させながら坑口４に押し込み、シールド掘削
機５の後端に嵌合させる。この時、舌状パツキン
１４の内径は管体８の外径よりも小さいため、舌
状パツキン１４は平面環状の形状から管体８に押
し広げられてその内周部が伸びると共に前方に曲
げられて管体８の外周面に該管体を締め付けるよ
うに水密に密接する。 Next, the tubular body 8 is pushed into the tunnel mouth 4 while slidingly contacting the inner circumference of the tongue-shaped packing 14, and is fitted into the rear end of the shield excavator 5. At this time, since the inner diameter of the tongue-shaped packing 14 is smaller than the outer diameter of the tube body 8, the tongue-shaped packing 14 is pushed out from its planar annular shape into the tube body 8, and its inner circumference is extended and bent forward. The pipe body is brought into close contact with the outer peripheral surface of the pipe body 8 in a watertight manner so as to tighten the pipe body.
次に、注入パイプ１８からバルブ１９を介して
ベントナイト等の泥水２０（非硬化性で且つ粘性
を有するものが望ましい）をリング部材１３の内
側に注入すると、泥水は舌状パツキン１４と不透
水膜６、管体８の外周面、リング部材１３の内周
面とで囲まれた空間に注入され、不透水膜を管体
外周面側から外方に押圧する。 Next, when muddy water 20 such as bentonite (preferably non-hardening and viscous material) is injected into the inside of the ring member 13 from the injection pipe 18 through the valve 19, the muddy water flows between the tongue-shaped packing 14 and the impermeable membrane. 6. It is injected into the space surrounded by the outer peripheral surface of the tube 8 and the inner peripheral surface of the ring member 13, and presses the water-impermeable membrane outward from the outer peripheral surface of the tube.
この泥水を地下水圧以上の圧力で常に前記空間
部に充満させておくことにより、不透水膜６は管
体８に接することがない。 By constantly filling the space with this muddy water at a pressure higher than groundwater pressure, the impermeable membrane 6 does not come into contact with the pipe body 8.
又、泥水を前記空間部に加圧充満したのち、断
面半円のパツキン９から流体を抜いて該パツキン
９を収縮させる。 Further, after filling the space with muddy water under pressure, the fluid is removed from the packing 9 having a semicircular cross section to cause the packing 9 to contract.
しかるのち、管体８の後端から推進ジヤツキ
（図示せず）で押し、該管体を介してシールド掘
削機５を掘進させると、断面半円のパツキン９は
シールド掘削機５の外周面から外れる。 Thereafter, when the shield excavator 5 is pushed through the rear end of the tube body 8 with a propulsion jack (not shown), the seal 9, which has a semicircular cross section, is removed from the outer circumferential surface of the shield excavator 5. It comes off.
この際、パツキン９の内径は管体８の外径より
も大きくしているので、該パツキン９が不透水膜
６を管体８の外周に押しつけることがない。 At this time, since the inner diameter of the packing 9 is made larger than the outer diameter of the tube 8, the packing 9 does not press the impermeable membrane 6 against the outer periphery of the tube 8.
こうして通常の掘進を行うと、管体８の外周全
面に泥水を介して不透水膜６を被覆していくこと
ができる。 By performing normal excavation in this manner, the entire outer periphery of the tube body 8 can be coated with the impermeable membrane 6 through the muddy water.
なお、以上の実施例において、坑口４の内周面
に装着したパツキン９の形状は断面半円形状のリ
ング体に形成したが、第４，５図に示すように、
坑口４の内周面に周方向に配設した複数の水バツ
グ２９ａと坑口４の周側面にボルト１２によつて
固定された前方に向かつて屈曲している舌状パツ
キン２９ｂとで構成してもよく、この舌状パツキ
ン２９ｂの内径をシールド掘削機５の外径に略等
しくし、各水バツグ内に注水してバツグを膨脹さ
せることにより舌状パツキン２９ｂをシールド掘
削機５に圧接させるようにしてもよい。 In addition, in the above embodiment, the shape of the gasket 9 attached to the inner peripheral surface of the mine entrance 4 was formed into a ring body with a semicircular cross section, but as shown in FIGS. 4 and 5,
It is composed of a plurality of water bags 29a arranged circumferentially on the inner circumferential surface of the mine entrance 4 and a tongue-shaped packing 29b fixed to the circumferential surface of the mine entrance 4 by bolts 12 and bent toward the front. Preferably, the inner diameter of the tongue-shaped packing 29b is made approximately equal to the outer diameter of the shield excavator 5, and the tongue-shaped packing 29b is brought into pressure contact with the shield excavator 5 by injecting water into each water bag and expanding the bag. You can also do this.
（考案の効果）
以上のように本考案の坑口パツキンによれば、
坑口周辺に取り付けたシールド掘削機外周に圧接
させるパツキンとシールド掘削機の通過直前に取
り付けて後続管体の外周面に圧接させるパツキン
とからなり、これらのパツキン間の空間部に泥水
を注入するように構成したので、シールド掘削機
の後端から引き出されて端部を坑口周側面に取り
付けられた不透水膜が、その泥水圧により外径方
向に押し広げられてヒユーム管等の管体に接する
ことがなく、従つて、ヒユーム管等の前進にもか
かわらず、不透水膜が破損することがない。(Effect of the invention) As described above, according to the wellhead packing of the invention,
It consists of a gasket that is attached to the outer periphery of the shield excavator installed around the mine entrance, and a gasket that is installed just before the shield excavator passes and is press-contacted to the outer circumferential surface of the following pipe body, and muddy water is injected into the space between these gaskets. With this structure, the impermeable membrane, which is pulled out from the rear end of the shield excavator and whose end is attached to the circumferential side of the well mouth, is pushed outward in the radial direction by the mud pressure and comes into contact with the pipe body such as the hump pipe. Therefore, the water-impermeable membrane will not be damaged even if the hume tube or the like moves forward.
図面は本考案の実施例を示すもので、第１図は
縦断側面図、第２図及び第３図は坑口からシール
ド掘削機を前進させる場合のパツキン装着状態を
示す断面図、第４図は本考案の別な実施例を示す
断面図、第５図はその簡略縦断正面図である。
１……立坑、４……発進坑口、５……シールド
掘削機、６……筒状不透水膜、８……管体、９…
…パツキン、１０……流体供給パイプ、１２……
ボルト、１３……リング部材、１４……舌状パツ
キン、１８……泥水注入パンプ。
The drawings show an embodiment of the present invention, and FIG. 1 is a vertical side view, FIGS. 2 and 3 are sectional views showing the state in which the shield is installed when the shield excavator is advanced from the tunnel entrance, and FIG. FIG. 5 is a sectional view showing another embodiment of the present invention, and FIG. 5 is a simplified longitudinal sectional front view thereof. DESCRIPTION OF SYMBOLS 1... Vertical shaft, 4... Starting mine entrance, 5... Shield excavator, 6... Cylindrical impermeable membrane, 8... Pipe body, 9...
...Packskin, 10...Fluid supply pipe, 12...
Bolt, 13... Ring member, 14... Tongue-shaped gasket, 18... Mud water injection pump.
Claims (1)
りも外径が小さく形成されたヒユーム管等の管体
を後続させてシールド掘削機の後部に格納した筒
状不透水膜を後続管体に被覆する工法における立
坑の発進坑口パツキンにおいて、坑口周辺に取り
付けたシールド掘削機外周面に圧接させるパツキ
ンとシールド掘削機の通過直前に取り付けて後続
管体の外周面に圧接させるパツキンとからなり、
これらのパツキン間の空間部に泥水を注入するよ
うに構成したことを特徴とする坑口パツキン。 A shield excavator is followed by a pipe body such as a hume pipe formed with an outer diameter smaller than the outer diameter of the shield excavator, and the subsequent pipe body is covered with a cylindrical impermeable membrane stored at the rear of the shield excavator. The starting shaft opening of a shaft in this construction method consists of a packing that is attached to the outer circumferential surface of the shield excavator installed around the shaft entrance, and a packing that is attached just before the shield excavator passes and is pressed to the outer circumferential surface of the succeeding pipe body,
A wellhead packing is characterized in that it is configured to inject muddy water into the space between these packings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1719585U JPH0332621Y2 (en) | 1985-02-09 | 1985-02-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1719585U JPH0332621Y2 (en) | 1985-02-09 | 1985-02-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61135994U JPS61135994U (en) | 1986-08-23 |
| JPH0332621Y2 true JPH0332621Y2 (en) | 1991-07-10 |
Family
ID=30504671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1719585U Expired JPH0332621Y2 (en) | 1985-02-09 | 1985-02-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0332621Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2607915B2 (en) * | 1988-06-16 | 1997-05-07 | 中部電力 株式会社 | Starter construction structure of shield machine |
| JP2851065B2 (en) * | 1989-08-01 | 1999-01-27 | 株式会社協和エクシオ | Packing material |
| JP2003003785A (en) * | 2001-06-26 | 2003-01-08 | Ashimori Ind Co Ltd | Sealing bag |
-
1985
- 1985-02-09 JP JP1719585U patent/JPH0332621Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61135994U (en) | 1986-08-23 |
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