JPH0419227Y2 - - Google Patents
Info
- Publication number
- JPH0419227Y2 JPH0419227Y2 JP14261888U JP14261888U JPH0419227Y2 JP H0419227 Y2 JPH0419227 Y2 JP H0419227Y2 JP 14261888 U JP14261888 U JP 14261888U JP 14261888 U JP14261888 U JP 14261888U JP H0419227 Y2 JPH0419227 Y2 JP H0419227Y2
- Authority
- JP
- Japan
- Prior art keywords
- bolt
- washer
- prefabricated
- bolts
- cylindrical nut
- 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
- 239000000463 material Substances 0.000 claims description 26
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、プレハブ基材用の連結ボルトに関
し、詳しくは、プレハブ基材として、例えばプレ
ハブ管やブロツクを連続して連結してゆくところ
のプレハブ基材用の連結ボルトに関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a connecting bolt for prefabricated base materials, and more specifically, it is used for connecting prefabricated pipes or blocks in succession as prefabricated base materials. This invention relates to connection bolts for prefabricated base materials.
この種のプレハブ基材用の連結ボルトとして
は、例えば、実開昭58−36943号公報に開示され
ている。この従来技術について、第８図に基づい
て説明すると、プレハブ管１０，１１の長さに対
応したボルト１２，１３を々準備して、接続する
プレハブ管１０，１１の継ぎ目部分において、両
プレハブ管１０，１１に通されたボルト１２，１
３を繋ぎ管１４に夫々螺合させることによつて両
ボルト１２，１３同士を互いに緊締する構造のも
のが知られていた。
This type of connection bolt for prefabricated base materials is disclosed, for example, in Japanese Utility Model Application Publication No. 58-36943. This conventional technique will be explained based on FIG. 8. Bolts 12 and 13 corresponding to the lengths of the prefabricated pipes 10 and 11 are prepared, and both prefabricated pipes are connected at the joint part of the prefabricated pipes 10 and 11 to be connected. Bolts 12 and 1 passed through 10 and 11
A structure is known in which both bolts 12 and 13 are tightened together by screwing bolts 3 into connecting tubes 14, respectively.
上述の従来技術にかかるプレハブ基材用の連結
ボルトによれば、
接続するプレハブ管１０，１１の長さに応じ
たボルト１２，１３を準備しなければならな
い、
２本のボルト１２，１３接続に別途部材とし
てネジ切りした繋ぎ管１４を準備しなければな
らない、
プレハブ基材の連結を解除する場合、連結ボ
ルトが２本同時に共回りし、プレハブ基材が２
体同時に解除される場合もあり、不都合な点が
あつた。
According to the connection bolt for prefabricated base materials according to the above-mentioned prior art, the bolts 12 and 13 must be prepared according to the length of the prefabricated pipes 10 and 11 to be connected. A threaded connecting pipe 14 must be prepared as a separate member. When disconnecting the prefabricated base materials, the two connecting bolts rotate at the same time, and the two prefabricated base materials
There were cases where the body was released at the same time, which was an inconvenience.
また、プレハブ基材用の連結に際し、２本の
ボルト１２，１３の繋ぎ管１４に対する連結が
螺合によるため、そのボルト１２を回転させる
工具が必要であると共に螺合手間が結構煩わし
い、という問題があつた。 In addition, when connecting prefabricated base materials, the two bolts 12 and 13 are connected to the connecting pipe 14 by threading, which requires a tool to rotate the bolt 12, and the screwing process is quite troublesome. It was hot.
即ち、上記項については、プレハブ管１０，
１１の製作誤差については上述の繋ぎ管１４にお
ける遊びで吸収できるが、プレハブ管１０，１１
の設計変更等による大幅な寸法差については、こ
れを吸収できる構成ではなかつた。 That is, regarding the above items, the prefabricated pipe 10,
The manufacturing error of No. 11 can be absorbed by the play in the connecting pipe 14 described above, but the prefabricated pipes 10 and
The structure was not able to absorb large dimensional differences due to design changes, etc.
また、上記項については、繋ぎ管１４を別途
製作する必要がある。 Further, regarding the above items, it is necessary to separately manufacture the connecting pipe 14.
そして、プレハブ管１０，１１の連結手間も、
２本のボルト１２，１３の相対回動によるもの
で、操作が簡単に行かないのである。 Also, the time and effort required to connect the prefabricated pipes 10 and 11 is
This is due to the relative rotation of the two bolts 12 and 13, which makes it difficult to operate.
本考案にかかるプレハブ基材用の連結ボルト
は、上述した従来技術のもつ課題を解決し、プレ
ハブ基材の連結に際し、そのボルト１の連結を、
従来の螺合と異なり簡単な打ち込み操作によつて
行えるべく、請求項(1)において、ボルト１の先端
部１ａを鋭角に形成すると共に、ボルト１の先端
外周に係合用突部２を複数条形成し、該ボルト１
の基端部１ｂに、このボルト１の径よりも大きい
内径を有し、且つ、所定長さを有する筒状ナツト
３を一体的に設け、該筒状ナツト３の基端部３ｃ
を内側に切り込みワツシヤ４を設け、該切り込み
ワツシヤ４の中央を、前記ボルト１の係合用突２
に嵌合できる係合部４ａと、該係合部４ａの続く
切り込み部４ｂとで構成してある、という解決手
段を講じたものである。
The connecting bolt for prefabricated base materials according to the present invention solves the problems of the prior art described above, and when connecting prefabricated base materials, the bolt 1 can be connected by
In claim (1), the tip 1a of the bolt 1 is formed at an acute angle, and a plurality of engagement protrusions 2 are provided on the outer periphery of the tip of the bolt 1 so that the engagement can be performed by a simple driving operation unlike conventional screwing. form the bolt 1
A cylindrical nut 3 having an inner diameter larger than the diameter of the bolt 1 and a predetermined length is integrally provided at the base end 1b of the bolt 1, and the base end 3c of the cylindrical nut 3
A washer 4 is provided by cutting the washer 4 inwardly, and the center of the washer 4 is connected to the engagement protrusion 2 of the bolt 1.
This solution is composed of an engaging part 4a that can be fitted into the engaging part 4a, and a notch part 4b that continues from the engaging part 4a.
そして、プレハブ基材の連結解除に際し、その
ボルト１の連結を、打ち込み連結にもかかわら
ず、回動操作によつて簡単に解除できるように、
請求項(2)においては、上記ボルト１の先端部１ａ
から所定長さだけ雄ネジ２を形成し、前記切り込
みワツシヤ４に対する嵌合解除において、前記係
合部４ａに対してネジ回動によつて解除するよう
に構成した、という解決手段を講じたのである。 When uncoupling the prefabricated base materials, the bolt 1 can be easily uncoupled by a rotation operation even though it is a driven connection.
In claim (2), the tip portion 1a of the bolt 1
A solution has been taken in which a male thread 2 is formed with a predetermined length from the slit, and when the engagement with the notch washer 4 is released, it is released by rotating the screw with respect to the engagement part 4a. be.
また、上記プレハブ基材を介して前記ボルト１
にかかる大きな引つ張り力に対応できるように、
請求項(3)においては、
上記ワツシヤ４は、前記筒状ナツト３に対して
ワツシヤ固定ボルト５によつて複数個着脱自在に
取りつけられる、という手段を講じている。 Further, the bolt 1 is inserted through the prefabricated base material.
In order to cope with the large tensile force applied to the
In claim (3), a plurality of washers 4 are detachably attached to the cylindrical nut 3 by means of washer fixing bolts 5.
又、撓みを容易にし、上記ワツシヤ４によるボ
ルト１への係合に確実性をもたせるために、請求
項(4)においては、上記ワツシヤ４は、0.1乃至1.2
mmの厚さに構成されている、という手段を講じた
のである。 Further, in order to facilitate the bending and ensure the engagement of the washer 4 with the bolt 1, in claim (4), the washer 4 has a diameter of 0.1 to 1.2.
The company took the measure of having a thickness of 1 mm.
上記切り込みワツシヤ４は、金属製が好ましい
が、これに前記ボルト１の雄ネジ２が嵌入螺合さ
れたとき、このボルト１の押し込み方向に撓むこ
とのできる可撓性を備えているものであればよ
い。 The notch washer 4 is preferably made of metal, but it must be flexible enough to bend in the pushing direction of the bolt 1 when the male thread 2 of the bolt 1 is fitted into it. Good to have.
上記プレハブ基材用の連結ボルトを用いて、例
えば、第５図乃至第６図に示すようにプレハブ管
６，７を連結する場合、一方のプレハブ管６に対
して連結するプレハブ管７を接当させ、一方のプ
レハブ管６に挿通された一方の連結ボルト１の筒
状ナツト３に他方のプレハブ管７に挿通された他
方の連結ボルト１′を打ち込みによつて、前記筒
状ナツト３内に設けた切り込みワツシヤ４を、そ
の切り込み４ｂにより連結ボルト１′の挿入方向
に容易に撓ませつつ嵌合させることが出来るので
ある。
For example, when connecting prefabricated pipes 6 and 7 as shown in FIGS. 5 and 6 using the connecting bolt for prefabricated base materials, connect the prefabricated pipe 7 to one prefabricated pipe 6. The other connecting bolt 1' inserted into the other prefabricated pipe 7 is inserted into the cylindrical nut 3 of one of the connecting bolts 1 inserted into one prefabricated pipe 6 by driving it into the cylindrical nut 3. The notched washer 4 provided in the notch 4b can be easily bent in the direction of insertion of the connecting bolt 1' and fitted into the connecting bolt 1'.
そして、打ち込み完了後には、前記ワツシヤ４
の内周縁が連結ボルト１′に対して斜めに接当し、
このワツシヤ４の復元力によつて、その係合部４
ａが連結ボルト１′の係合用突部２間に食い込む
ようにして協力な係合がもたらされ、プレハブ管
６，７同士を引き離す方向の力が前記連結ボルト
１，１′に作用したときに強力に抵抗できるので
あり、これによつて連結ボルト１，１′の緩みを
未然に防止してプレハブ管６，７の連結を常時強
固なものに維持できるのである。 After the driving is completed, the washer 4 is
The inner peripheral edge of the bolt contacts the connecting bolt 1' diagonally,
Due to the restoring force of this washer 4, the engaging portion 4
When the joint bolt a bites between the engagement protrusions 2 of the connecting bolt 1', a cooperative engagement is brought about, and a force in the direction of separating the prefabricated pipes 6 and 7 from each other acts on the connecting bolts 1 and 1'. As a result, loosening of the connecting bolts 1, 1' can be prevented and the connection between the prefabricated pipes 6, 7 can be maintained firmly at all times.
以下、本考案にかかるプレハブ基材用の連結ボ
ルトの一実施例を、プレハブ基材として、プレハ
ブ管を用いた場合について図面に基づいて説明す
る。
Hereinafter, an embodiment of a connecting bolt for a prefabricated base material according to the present invention will be described based on the drawings in a case where a prefabricated pipe is used as the prefabricated base material.
第１図乃至第６図に示すように、鋼製の丸棒状
のボルト１の先端部１ａを鋭角に形成すると共
に、該先端部１ａから所定長さだけ雄ネジ２（嵌
め殺しで良い場合は単なるリング状の係合用突部
２とる。）を形成し、該ボルト１の基端部１ｂに、
このボルト１の径よりも大きい内径を有し、且
つ、所定長さを有する筒状ナツト３を一体的に設
けてある。 As shown in FIGS. 1 to 6, the tip 1a of a steel round bolt 1 is formed at an acute angle, and a male screw 2 (if it is OK to fit it in, A simple ring-shaped engagement protrusion 2) is formed at the base end 1b of the bolt 1,
A cylindrical nut 3 having an inner diameter larger than the diameter of the bolt 1 and a predetermined length is integrally provided.
この筒状ナツト３を構成するに、前記ボルト１
の基端部１ｂにネジを切つて、これに平板状のワ
ツシヤ３ａを螺合させて後に溶接で固定し、この
ワツシヤ３ａの反対側面に筒状体３ｂを溶接で固
定してある。 To constitute this cylindrical nut 3, the bolt 1
A flat plate-shaped washer 3a is screwed onto the proximal end 1b, and is later fixed by welding, and a cylindrical body 3b is fixed to the opposite side of the washer 3a by welding.
前記筒状ナツト３の基端部３ｃの内側に切り込
みワツシヤ４（この実施例では２個重ねて使用）
を設けてある。 A washer 4 is cut inside the base end 3c of the cylindrical nut 3 (two washers are used in this embodiment).
is provided.
この切り込みワツシヤ４は、鋼板製で、第３図
に示すように、その中央を、前記ボルト１の雄ネ
ジ２に螺合できる係合部４ａと、該係合部４ａに
続く切り込み部４ｂとで構成してある。 This notch washer 4 is made of a steel plate, and as shown in FIG. 3, the center thereof has an engaging portion 4a that can be screwed into the male thread 2 of the bolt 1, and a notch portion 4b continuing from the engaging portion 4a. It is composed of
前記切り込みワツシヤ４を前記筒状ナツト３に
対してワツシヤ固定ボルト５によつて複数個着脱
自在に取りつけられるようにされている。 A plurality of the cut washers 4 are detachably attached to the cylindrical nut 3 by means of washer fixing bolts 5.
このワツシヤ固定ボルト５は、前記筒状ナツト
３の基端部３ｃに内側に形成された段部に形成さ
れたネジに螺合できるように構成され、その頭部
は六角に構成されている。この構造によつて、前
記切り込みワツシヤ４を、前記ワツシヤ固定ボル
ト５と前記筒状ナツト３の段部との間に挟持する
ようにされている。 This washer fixing bolt 5 is configured to be able to be screwed into a screw formed in a stepped portion formed inside the base end 3c of the cylindrical nut 3, and its head is configured in a hexagonal shape. With this structure, the notch washer 4 is held between the washer fixing bolt 5 and the stepped portion of the cylindrical nut 3.
前記ボルト１の雄ネジ２は、この実施例では60
mm程度の長さに形成されており、前記切り込みワ
ツシヤ４は、撓みが容易に得られるように0.8mm
にされている。しかし、前記雄ネジ２の長さは、
適宜の寸法にすることができるし、切り込みワツ
シヤ４も、剛性があつて撓みが得られる厚み、例
えば、0.3乃至1.2mm程度あれば好ましい。 The male thread 2 of the bolt 1 is 60 mm in this embodiment.
The cut washer 4 is formed to have a length of about 0.8 mm, and the cut washer 4 has a length of about 0.8 mm.
is being used. However, the length of the male screw 2 is
It is preferable that the cut washer 4 has a thickness of about 0.3 to 1.2 mm, for example, about 0.3 to 1.2 mm, so that it can be rigid and flexible.
第５図は、プレハブ管６，７を連結する直前を
示し、両プレハブ管６，７の接当部にはゴムパツ
キン８が介在されている。 FIG. 5 shows the prefabricated pipes 6, 7 immediately before they are connected, and a rubber packing 8 is interposed at the abutting portion of both the prefabricated pipes 6, 7.
第６図は、プレハブ管６，７を連結した状態を
示す。 FIG. 6 shows a state in which prefabricated pipes 6 and 7 are connected.
第４図は、一対のボルト１，１′の連結部の拡
大縦断面で、前記切り込みワツシヤ４の内側縁
が、ボルト１′の打ち込み方向に撓んでいる状態
を示している。 FIG. 4 is an enlarged longitudinal cross-section of the connecting portion of the pair of bolts 1, 1', showing a state in which the inner edge of the notched washer 4 is bent in the driving direction of the bolt 1'.
第７図は、前記切り込みワツシヤ４の変形例を
示し、この構造では、切り込み部４ｂが大きな溝
を形成するようにされており、これによつて係合
部４ａの撓みを容易ならしめている。 FIG. 7 shows a modification of the cut washer 4. In this structure, the cut portion 4b forms a large groove, thereby making it easy to bend the engaging portion 4a.
上記一対のボルト１，１′の連結解除は、一方
のボルト１′を緩める方向に回転させることで、
前記切り込みワツシヤ４に対する螺合によつて容
易に行うことができる。逆に、締め込む方向に回
転させる事により増締が可能になる。 The pair of bolts 1, 1' can be uncoupled by rotating one bolt 1' in the loosening direction.
This can be easily done by screwing into the cut washer 4. Conversely, additional tightening is possible by rotating in the tightening direction.
本考案にかかるプレハブ基材用の連結ボルトに
よれば、接続するプレハブ基材の長さに応じたボ
ルトを個々に準備することなく、また、別途部材
としてのネジ切りした繋ぎ管を準備することな
く、そのボルトに備えたナツトと、連結するボル
トとの間の所定長さの分の連結代によつて所定範
囲の寸法変化に対応できる利点があるとともに、
ワツシヤの嵌合変形による復元力とボルト先端の
係合用突部との係合によつて強固な係合が得ら
れ、プレハブ基材を引き離す引つ張り力に協力に
対抗できて、ボルト連結の緩みを自動的に防止で
き、もつて、プレハブ基材の連結緩みに起因すう
漏れ（プレハブ管の場合）や崩壊（ブロツクの場
合）を防止できる効果を奏する。
According to the connecting bolt for prefabricated base materials according to the present invention, there is no need to prepare individual bolts according to the length of the prefabricated base materials to be connected, and it is possible to prepare a threaded connecting pipe as a separate member. This method has the advantage of being able to accommodate dimensional changes within a predetermined range by providing a predetermined length of connection between the nut provided on the bolt and the bolt to be connected.
A strong engagement is obtained by the restoring force caused by the mating deformation of the washer and the engagement with the engagement protrusion at the tip of the bolt, which can effectively resist the pulling force that pulls the prefabricated base material apart, and improves the bolt connection. This has the effect of automatically preventing loosening and, in turn, preventing leakage (in the case of prefabricated pipes) or collapse (in the case of blocks) caused by loosening of connections between prefabricated base materials.
また、前記ボルトの先端から所定長さにネジを
切つておくことで、プレハブ基材の連結に際して
のボルト嵌合時には打ち込みによる簡単な連結が
得られながら、プレハブ基材の連結解除に際して
は、ボルトを螺合による回動操作で容易に連結解
除できる利点がある。 In addition, by cutting a thread to a predetermined length from the tip of the bolt, it is possible to easily connect the bolts by driving when connecting the prefabricated base materials, but when disconnecting the prefabricated base materials, the bolts can be easily connected. It has the advantage that it can be easily disconnected by rotating the screws together.
図面は、本考案にかかるプレハブ基材用の連結
ボルトの一実施例を示し、第１図は、連結ボルト
の縦断側面図、第２図は、連結ボルトの端面図、
第３図は、連結ボルトの連結状態を示す要部の拡
大縦断側面図、第４図は、切り込みワツシヤの正
面図、第５図は、ポレハブ管を連結する直前の縦
断側面図、第６図は、ポレハブ管を連結した状態
の縦断側面図、第７図は、一部改変した切り込み
ワツシヤの正面図、第８図は、従来のプレハブ基
材用の連結ボルトを示す縦断側面図である。
ボルト……１、先端部……１ａ、雄ネジ（係合
用突部）……２、先端部……１ｂ、筒状ナツト…
…３、筒状ナツト３の基端部……３ｃ、切り込み
ワツシヤ……４、係合部……４ａ……、切り込み
部……４ｂ、ワツシヤ固定ボルト……５。
The drawings show an embodiment of the connecting bolt for prefabricated base materials according to the present invention, FIG. 1 is a vertical side view of the connecting bolt, FIG. 2 is an end view of the connecting bolt,
Fig. 3 is an enlarged vertical side view of the main parts showing the connected state of the connecting bolt, Fig. 4 is a front view of the notch washer, Fig. 5 is a longitudinal side view just before connecting the Polehub pipe, and Fig. 6 7 is a front view of a partially modified notch washer, and FIG. 8 is a longitudinal side view showing a conventional connecting bolt for prefabricated base materials. Bolt...1, Tip part...1a, Male thread (engaging protrusion)...2, Tip part...1b, Cylindrical nut...
...3. The base end of the cylindrical nut 3...3c, the notched washer...4, the engaging part...4a..., the notched part...4b, the washer fixing bolt...5.
Claims (1)
に、ボルト１の先端外周に係合用突部２を複数
条形成し、該ボルト１の基端部１ｂに、このボ
ルト１の径よりも大きい内径を有し、且つ、所
定長さを有する筒状ナツト３を一体的に設け、
該筒状ナツト３の基端部３ｃを内側に切り込み
ワツシヤ４を設け、該切り込みワツシヤ４の中
央を、前記ボルト１の係合用突２に嵌合できる
係合部４ａと、該係合部４ａの続く切り込み部
４ｂとで構成してあるプレハブ基材用の連結ボ
ルト。 (2) 上記ボルト１の先端部１ａから所定長さだけ
雄ネジ２を形成し、前記切り込みワツシヤ４に
対する嵌合解除において、前記係合部４ａに対
してネジ回動によつて解除するように構成した
請求項(1)に記載のプレハブ基材用の連結ボル
ト。 (3) 上記ワツシヤ４は、前記筒状ナツト３に対し
てワツシヤ固定ボルト５によつて複数個着脱自
在に取りつけられることを特徴とする請求項(1)
に記載のプレハブ基材用の連結ボルト。[Claims for Utility Model Registration] (1) The distal end 1a of the bolt 1 is formed at an acute angle, and a plurality of engagement protrusions 2 are formed on the outer periphery of the distal end of the bolt 1, and the proximal end 1b of the bolt 1 is formed with a plurality of engagement protrusions 2. , a cylindrical nut 3 having an inner diameter larger than the diameter of this bolt 1 and a predetermined length is integrally provided,
A washer 4 is provided by cutting the base end 3c of the cylindrical nut 3 inward, and the center of the cut washer 4 has an engaging portion 4a that can be fitted into the engaging protrusion 2 of the bolt 1, and the engaging portion 4a. A connecting bolt for a prefabricated base material, which is composed of a continuous notch 4b. (2) A male thread 2 is formed by a predetermined length from the tip 1a of the bolt 1, and when the notch washer 4 is unfitted, the screw is rotated relative to the engaging part 4a. A connecting bolt for a prefabricated base material according to claim (1). (3) Claim (1) characterized in that a plurality of washers 4 are detachably attached to the cylindrical nut 3 by means of washers fixing bolts 5.
Connecting bolts for prefabricated base materials described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14261888U JPH0419227Y2 (en) | 1988-10-31 | 1988-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14261888U JPH0419227Y2 (en) | 1988-10-31 | 1988-10-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0266711U JPH0266711U (en) | 1990-05-21 |
| JPH0419227Y2 true JPH0419227Y2 (en) | 1992-04-30 |
Family
ID=31408726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14261888U Expired JPH0419227Y2 (en) | 1988-10-31 | 1988-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0419227Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100915189B1 (en) * | 2008-10-14 | 2009-09-03 | (주)씨스이엔지 | Segment apparatus for reparing a pipe |
-
1988
- 1988-10-31 JP JP14261888U patent/JPH0419227Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0266711U (en) | 1990-05-21 |
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