JPH0638619Y2 - Shaped steel mounting structure with flange and web using a backing metal for welding - Google Patents
Shaped steel mounting structure with flange and web using a backing metal for weldingInfo
- Publication number
- JPH0638619Y2 JPH0638619Y2 JP1987120709U JP12070987U JPH0638619Y2 JP H0638619 Y2 JPH0638619 Y2 JP H0638619Y2 JP 1987120709 U JP1987120709 U JP 1987120709U JP 12070987 U JP12070987 U JP 12070987U JP H0638619 Y2 JPH0638619 Y2 JP H0638619Y2
- Authority
- JP
- Japan
- Prior art keywords
- web
- groove
- flange
- backing metal
- welding
- 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 - Lifetime
Links
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、溶接用裏当金を用いたフランジ部とウエブ部
とを備えた形鋼の取付構造に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a structural steel mounting structure having a flange portion and a web portion using a backing metal for welding.
（従来の技術） 従来、鋼構造物、例えば建物の鉄骨構造物において、ボ
ックス形あるいはＨ形鋼等の柱体に、梁、桁材としての
Ｈ形、Ｉ形、Ｔ形等の形鋼を突合わせて溶接により取付
ける場合に、フランジ部端縁に形成されたレ形開先をフ
ランジ部裏面側から閉塞すべく、長手方向長がフランジ
部幅よりも長い短冊状の溶接用裏当金を用いるのが一般
的である（特公昭60−55222号公報参照）。(Prior Art) Conventionally, in a steel structure, for example, a steel frame structure of a building, a columnar body such as a box-shaped or H-shaped steel is provided with a beam such as a H-shaped, I-shaped or T-shaped shaped steel as a girder material. When attaching by butt welding, use a strip-shaped welding backing metal whose longitudinal length is longer than the flange width so that the rectangular groove formed on the edge of the flange is closed from the rear side of the flange. It is generally used (see Japanese Patent Publication No. 60-55222).
しかし、かかるフランジ部幅よりも長い裏当金を用いる
場合には、その側端部を柱体に当接させるようにすべ
く、ウエブ部の端縁側に当該裏当金を挿通させるための
スカラップを設ける必要があったため、加工工数の増
加、溶接部位の減少に伴う固着力の低下等を招くという
欠点があった。However, when using a backing metal longer than the width of the flange portion, a scallop for inserting the backing metal into the end edge side of the web portion so that the side end portion of the backing metal is brought into contact with the pillar body. Since it is necessary to provide the above, there is a drawback that the number of processing steps increases and the adhesion strength decreases due to the decrease in the number of welded portions.
そこで、前記スカラップを形成せずに裏当金を採用しう
るようにした技術として、裏当金の長手方向一端側に、
ウエブ部のつけ根、即ちフランジ部裏面とウエブ部との
接続部分の湾曲形状に適合する形状の屈曲部を設け、そ
の屈曲部がウエブ部のつけ根を左右からはさむように、
一つのフランジ部に対して二つの裏当金をウエブ部の左
右両側に配置したものがある（実開昭49−75915号公報
参照）。Therefore, as a technology that allows the backing metal to be adopted without forming the scallop, one of the longitudinal ends of the backing metal is
The root of the web portion, that is, a bent portion having a shape that conforms to the curved shape of the connecting portion between the back surface of the flange portion and the web portion is provided, and the bent portion sandwiches the root of the web portion from the left and right,
There is one in which two backing plates are arranged on the left and right sides of the web part for one flange part (see Japanese Utility Model Laid-Open No. 49-75915).
（考案が解決しようとする課題） しかしながら、上記公報に記載の技術にあっても、例え
ばウエブ部も柱体に対して突合せ状とされてその端縁部
を溶接により固着する場合には、形鋼端縁部におけるフ
ランジ部とウエブ部とのクロス部分がその屈曲部によっ
て裏側から被覆され、そのクロス部分では形鋼と柱体と
を直接溶着することができず、固着力の点ではスカラッ
プがある場合と略同様に好ましくなかった。(Problems to be solved by the invention) However, even in the technique described in the above publication, for example, when the web portion is also butt-shaped with respect to the column body and the end edge portion thereof is fixed by welding, The cross portion of the flange portion and the web portion at the steel edge portion is covered from the back side by the bent portion, the shaped steel and the column cannot be directly welded at the cross portion, and the scallop has a point of fixing force. It was not as favorable as in some cases.
本考案は、かかる実情に鑑み、屈曲部を有する裏当金を
使用する場合でも、フランジ部とウエブ部のクロス部分
も柱体等に対して直接溶接できる溶接用裏当金を用いた
Ｈ形鋼等の取付構造を提供することを目的とする。In view of the above situation, the present invention is an H-shaped welding backing metal that enables direct welding of the flange and the web portion to the column body even when using a backing metal having a bent portion. The purpose is to provide a mounting structure of steel or the like.
（課題を解決するための手段） 上記目的を達成すべく、本考案が講じた技術的手段は、
レ形開先５を有するフランジ部３とウエブ部４とを備え
ている形鋼１の長手方向端縁が柱体２に突合せ状に当接
され、レ形開先５をフランジ部裏面７から閉塞すべく、
フランジ部裏面７とウエブ部４との接続部分８に適合す
る形状の屈曲部９を長手方向一端側に有する裏当金６
が、その幅方向側面が柱体２に当接し且つ屈曲部９が接
続部分８を左右からはさむようにウエブ部４の左右両側
に配置され、前記フランジ部３のレ形開先５部分、ウエ
ブ部４の接合端縁及び裏当金６の幅方向側端部が、それ
ぞれ柱体２に対して溶接15,12,14されている溶接用裏当
金を用いたフランジ部とウエブ部とを備えた形鋼の取付
構造において、 前記ウエブ部４接合端縁におけるフランジ部３との接続
部分８相当部位に、フランジ部３のレ形開先５と同一平
面状とされたウエブ部開先4aが、当該ウエブ部開先4aの
先端が裏当金６裏面近傍に至るように形成され、このウ
エブ部開先4a部分にも溶接15が施されている点にある。(Means for Solving the Problems) In order to achieve the above object, the technical means taken by the present invention are:
The longitudinal edge of the shaped steel 1 provided with the flange portion 3 having the recessed groove 5 and the web portion 4 is abutted against the columnar body 2 in a butt shape, and the recessed groove 5 is removed from the rear surface 7 of the flange portion. To block
Backing plate 6 having a bent portion 9 having a shape adapted to the connecting portion 8 between the flange rear surface 7 and the web portion 4 on one end side in the longitudinal direction.
However, the side surfaces in the width direction thereof are in contact with the columnar body 2 and the bent portions 9 are arranged on both the left and right sides of the web portion 4 so as to sandwich the connecting portion 8 from the left and right sides, respectively. The joining edge of the portion 4 and the widthwise side end of the backing metal 6 are welded to the column body 2 by welding 15,12,14 to form a flange portion and a web portion using a welding backing metal. In the mounting structure of the shaped steel provided, a web portion groove 4a is formed in the same plane as the concave groove 5 of the flange portion 3 at a portion corresponding to the connecting portion 8 with the flange portion 3 at the joint edge of the web portion 4. However, the tip of the groove 4a of the web portion is formed so as to reach near the back surface of the backing plate 6, and the welding 15 is also applied to the portion of the groove 4a of the web portion.
（実施例） 以下、図面に基づいて本考案の一実施例を説明する。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
図において、１は梁材であるＨ形鋼、２はたとえば断面
箱形材からなる柱体であり、Ｈ形鋼１は、フランジ部３
及びウエブ部４とから成る。In the figure, 1 is a beam H-shaped steel, 2 is a columnar body made of, for example, a box-shaped cross-section, and H-shaped steel 1 is a flange 3
And a web portion 4.
前記フランジ部３の長手方向端縁すなわち接合端部に
は、幅方向全域に亘ってレ形開先５が形成されており、
また、ウエブ部４の接合端縁におけるフランジ部３との
接続部分８相当部位には、前記レ形開先５から延長状に
延びて切欠き形成されたウエブ部開先4aが設けられ、該
開先4aが設けられていない接合端部における他の部分
は、柱体２に直接当接されるべく、まっすぐに延びた突
合せ面4bとされている。At the end of the flange portion 3 in the longitudinal direction, that is, the joining end portion, a rectangular groove 5 is formed over the entire width direction,
Further, a web portion groove 4a is formed at a portion corresponding to the connecting portion 8 with the flange portion 3 at the joint end edge of the web portion 4 so as to extend from the above-mentioned groove 5 in an extended manner and which is formed as a notch. The other portion of the joint end where the groove 4a is not provided is a butt surface 4b that extends straight so as to directly contact the columnar body 2.
また、前記レ形開先4aは、ウエブ部開先５と同一平面状
とされ、その先端が、第５図に示すように、フランジ部
裏面７に配置される後述する裏当金６下面近傍に至るよ
うに形成されている。Further, the concave groove 4a is formed in the same plane as the web groove 5, and the tip thereof is near the lower surface of the back metal plate 6 which will be described later and is arranged on the rear surface 7 of the flange portion as shown in FIG. Is formed to reach.
６は裏当金で、短冊形の鋼材から成り、その長手方向の
一端部は、Ｈ形鋼１のフランジ部裏面７とウエブ部４と
の接続部分８の曲面に密着する弯曲状の弯曲部９とされ
ており、そして、この裏当金６の他端部10は、前記屈曲
部９の弯曲方向とは逆方向に略直角に屈曲されている。Reference numeral 6 denotes a backing metal, which is made of a strip-shaped steel material, and one end portion in the longitudinal direction thereof is a curved curved portion that closely adheres to a curved surface of a connecting portion 8 between the flange rear surface 7 of the H-shaped steel 1 and the web portion 4. 9, and the other end 10 of the backing plate 6 is bent at a substantially right angle in the direction opposite to the bending direction of the bending portion 9.
尚、裏当金６の幅、厚さｔは、従来と同様にＨ形鋼１の
各部寸法に応じて決定され、さらに、Ｈ形鋼１等の開先
形状、寸法、ウエブ部４と柱体２とのすき間等も従来と
同様に設計される。The width and thickness t of the backing metal 6 are determined according to the respective dimensions of the H-section steel 1 as in the conventional case, and further, the groove shape and dimensions of the H-section steel 1 and the like, the web portion 4 and the column. The gap with the body 2 and the like are also designed in the same manner as in the past.
また、屈曲された他端部10の裏当金６のフランジ部裏面
７との接触面から突出する長さＬは、第４図に示す如
く、フランジ部３の厚さよりも長くせられており、ま
た、この端部10とフランジ部３の幅方向端縁との間に
は、わずかな間隙が形成されるよう配慮されている。Further, as shown in FIG. 4, the length L of the bent other end 10 of the backing metal 6 projecting from the contact surface with the flange rear surface 7 is made longer than the thickness of the flange 3. Moreover, it is taken into consideration that a slight gap is formed between the end portion 10 and the widthwise end edge of the flange portion 3.
第１図乃至第３図は、上記構成に係る溶接用裏当金６を
用いて、Ｈ形鋼１を柱体２に対して溶接により接合した
場合の取付構造を示す。FIGS. 1 to 3 show a mounting structure when the H-shaped steel 1 is joined to the column 2 by welding using the backing metal 6 for welding according to the above-mentioned configuration.
同図に示す如く、前記ウエブ部４の接合端部は、その突
合せ面4aを介して柱体２に対して直接当接されており、
このとき、前記レ形開先５の存在によってフランジ部３
の接合端部は柱体２との間に本溶接用の空間が保たれ
て、前記裏当金６がこの空間をフランジ部裏面７から閉
塞する。As shown in the figure, the joint end portion of the web portion 4 is directly contacted with the columnar body 2 through the butting surface 4a,
At this time, the flange portion 3 is formed due to the existence of the concave groove 5.
A space for main welding is maintained between the joint end portion and the column body 2, and the backing metal 6 closes this space from the rear surface 7 of the flange portion.
即ち、当該裏当金６は、第２図に示す如く、ウエブ部４
を挟んで左右両側に配置されており、かつ、第５図に示
す如く、レ形開先５をフランジ部裏面７側から閉塞すべ
く、その幅方向側面が柱体２に当接するようにフランジ
部裏面７に添着されている。That is, the backing metal 6 is, as shown in FIG.
Are arranged on both the left and right sides with the flange in between, and as shown in FIG. 5, in order to close the rectangular groove 5 from the rear surface 7 side of the flange portion, the side surface in the width direction contacts the pillar body 2 It is attached to the back surface 7 of the part.
なお、裏当金６のフランジ部裏面７との接触面の幅方向
両端縁は、第５図に示すように、面取り11加工を行い、
溶接欠陥の防止を図ることができる。In addition, as shown in FIG. 5, both end edges in the width direction of the contact surface of the backing metal 6 with the rear surface 7 of the flange portion are chamfered 11,
It is possible to prevent welding defects.
そして、本実施例においては、まず、開先５加工された
Ｈ形鋼１の接合端部に裏当金６を仮溶接しておき、柱体
２の接合取付個所に裏当金６の側面及びウエブ部４の突
合せ面4bを当接させてＨ形鋼１を組付け、ウエブ部４の
接合端縁を仮溶接すると共にすみ肉溶接12を行い、更に
裏当金６の裏側のすみ肉溶接13,14を行った後、前記ウ
エブ部開先4aを含むレ形開先５から裏当金６の他端部10
に亘り本溶接15される。Then, in the present embodiment, first, the backing metal 6 is temporarily welded to the joint end of the H-shaped steel 1 processed by the groove 5, and the side surface of the backing metal 6 is attached to the joint mounting portion of the pillar 2. And the abutting surface 4b of the web portion 4 are brought into contact with each other to assemble the H-shaped steel 1, the joint edge of the web portion 4 is provisionally welded and fillet weld 12 is performed, and the fillet on the back side of the backing metal 6 is further performed. After the welding 13 and 14 is performed, the square groove 5 including the groove 4a of the web to the other end 10 of the backing metal 6
Main welding is carried out for 15 years.
このように、本実施例によれば、裏当金６の一端部が屈
曲部９とされて当該裏当金６をウエブ部４を挟んで左右
両側に配置しているので、スカラップを設ける必要がな
く、前記したスカラップの存在による不都合を一掃する
ことができるのは勿論のこと、フランジ部３のレ形開先
５と共に裏当金６の裏面近傍にまで至るウエブ部開先4a
が形成されていて、その開先4a部分においても溶接15肉
が充填されることから、従来溶接することができなかっ
たウエブ部４とフランジ部３のクロス部分においても確
実に溶着することができ、溶接による固着力が増大され
る。As described above, according to this embodiment, since one end of the backing plate 6 is the bent portion 9 and the backing plate 6 is arranged on both the left and right sides of the web part 4, it is necessary to provide a scallop. It is possible to eliminate the above-mentioned inconvenience due to the presence of the scallop, and the groove portion 4a of the flange portion 3 and the groove portion 4a of the web portion extending to the vicinity of the rear surface of the backing metal 6 can be eliminated.
Since the welding 15 meat is filled even in the groove 4a portion, it is possible to reliably weld even the cross portion of the web portion 4 and the flange portion 3 which could not be conventionally welded. , The adhesion force by welding is increased.
また、そのウエブ部開先4aは、フランジ部３のレ形開先
５と同一平面形状とされているので、当該レ形開先５を
形成する際に同時に形成でき、加工も容易である。Further, since the web portion groove 4a has the same planar shape as the groove groove 5 of the flange portion 3, it can be formed at the same time when the groove groove 5 is formed, and the processing is easy.
更に、本実施例においては、前記裏当金６は、その両端
部に形成された屈曲形状によって断面視略Ｓ字形を呈し
ているので、縦方向、すなわちウエブ部４幅方向におけ
る柱体２に対する溶接長さが増大され、Ｈ形鋼１に対す
る上載荷重により発生するせん断力に対してより強固な
取付構造となっている。Further, in this embodiment, since the backing metal 6 has a substantially S-shaped cross section due to the bent shape formed at both ends thereof, the backing metal 6 with respect to the column 2 in the longitudinal direction, that is, the width direction of the web portion 4 is formed. The welding length is increased, and the attachment structure is more robust against the shearing force generated by the overlaid load on the H-section steel 1.
なお、上記実施例は、柱体２にＨ形鋼１を溶接する場合
についてのものがあるが、本考案にかかる裏当金６は、
Ｌ形鋼、Ｔ形鋼のフランジ部の接合に使用でき、フラン
ジ部とウエブ部とを備えている限りにおいて圧延形鋼は
もとより圧延形鋼以外の溶接組立により形成された形鋼
にも使用しうること勿論である。In addition, the above embodiment has a case where the H-shaped steel 1 is welded to the column body 2, but the backing metal 6 according to the present invention is
It can be used for joining flanges of L-shaped steel and T-shaped steel, and can be used not only for rolled shaped steels but also for shaped steels formed by welding assembly other than rolled shaped steels as long as it has a flange portion and a web portion. Of course to do.
（考案の効果） 以上説明したように、本考案によれば、フランジ部３の
レ形開先５と同一平面状のウエブ部開先4aが、その先端
が裏当金６裏面近傍に至るように形成され、そのウエブ
部開先4a部分にも溶接が施されているので、ウエブ部４
接合端縁が柱体２等に直接溶接される場合に、従来溶接
できなかったウエブ部４とフランジ部３のクロス部分に
おいても柱体２に直接溶接15でき、ウエブ部４の突合せ
面4bにおける溶接12と共に形鋼１の断面形状に沿った溶
接を略完全に行うことができ、柱体２に対する溶接によ
る固着力を大きく増大させることができる。(Effect of the Invention) As described above, according to the present invention, the leading edge of the web groove 4a, which is flush with the concave groove 5 of the flange portion 3, reaches the vicinity of the rear surface of the backing plate 6. The groove 4a of the web portion is also welded, so that the web portion 4
When the joining edge is directly welded to the column body 2 or the like, the cross portion of the web portion 4 and the flange portion 3 which could not be welded conventionally can be directly welded 15 to the column body 2 and the abutting surface 4b of the web portion 4 can be formed. Together with the welding 12, the welding along the cross-sectional shape of the shaped steel 1 can be performed almost completely, and the fixing force by welding to the columnar body 2 can be greatly increased.
第１図乃至第５図は本考案の一実施例を示し、第１図は
Ｈ形鋼の取付構造の要部側面図、第２図は第１図Ａ−Ａ
線断面図、第３図は同取付構造の斜視図、第４図は溶接
用裏当金の側面図、第５図は開先部分の拡大図である。 １…Ｈ形鋼、２…柱体、３…フランジ部、４…ウエブ
部、4a…ウエブ部開先、4b…突合せ面、５…レ形開先、
６…裏当金、７…フランジ部裏面、８…接続部分、９…
屈曲部、10…他端部、12,15…溶接、16…フランジ部表
面。1 to 5 show an embodiment of the present invention. FIG. 1 is a side view of a main portion of an H-shaped steel mounting structure, and FIG. 2 is FIG. 1A-A.
A line sectional view, FIG. 3 is a perspective view of the same mounting structure, FIG. 4 is a side view of a welding backing metal, and FIG. 5 is an enlarged view of a groove portion. 1 ... H-section steel, 2 ... Column, 3 ... Flange part, 4 ... Web part, 4a ... Web part groove, 4b ... Butt surface, 5 ... Re-shaped groove,
6 ... Backing metal, 7 ... Flange back surface, 8 ... Connection portion, 9 ...
Bent portion, 10 ... other end portion, 12,15 ... welding, 16 ... flange surface.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭49−75915（ＪＰ，Ｕ) 実開 昭59−194397（ＪＰ，Ｕ) 特公 昭51−29505（ＪＰ，Ｂ２) 特公 昭60−55222（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References: Showa 49-75915 (JP, U) Showa 59-194397 (JP, U) Japanese public Sho 51-29505 (JP, B2) Japanese public Sho 60- 55222 (JP, B2)
Claims (1)
とウエブ部（４）とを備えている形鋼（１）の長手方向
端縁が柱体（２）に突合せ状に当接され、レ形開先
（５）をフランジ部裏面（７）から閉塞すべく、フラン
ジ部裏面（７）とウエブ部（４）との接続部分（８）に
適合する形状の屈曲部（９）を長手方向一端側に有する
裏当金（６）が、その幅方向側面が柱体（２）に当接し
且つ屈曲部（９）が接続部分（８）を左右からはさむよ
うにウエブ部（４）の左右両側に配置され、前記フラン
ジ部（３）のレ形開先（５）部分、ウエブ部（４）の接
合端縁及び裏当金（６）の幅方向側端部が、それぞれ柱
体（２）に対して溶接（15）（12）（14）されている溶
接用裏当金を用いたフランジ部とウエブ部とを備えた形
鋼の取付構造において、 前記ウエブ部（４）接合端縁におけるフランジ部（３）
との接続部分（８）相当部位に、フランジ部（３）のレ
形開先（５）と同一平面状とされたウエブ部開先（4a）
が、当該ウエブ部開先（4a）の先端が裏当金（６）裏面
近傍に至るように形成され、このウエブ部開先（4a）部
分にも溶接（15）が施されていることを特徴とする溶接
用裏当金を用いたフランジ部とウエブ部とを備えた形鋼
の取付構造。1. A flange portion (3) having a concave groove (5).
The longitudinal edge of the shaped steel (1) provided with and the web portion (4) is butted against the columnar body (2) in a butt shape, and the groove (5) is removed from the rear surface (7) of the flange portion. A backing metal (6) having a bent portion (9) having a shape matching the connecting portion (8) between the rear surface (7) of the flange portion and the web portion (4) so as to be closed has a width thereof. The side faces of the direction are in contact with the pillar (2) and the bent portions (9) are arranged on both the left and right sides of the web portion (4) so as to sandwich the connecting portion (8) from the left and right sides, and the flange portion (3) has a reshape. The groove portion (5), the joint edge of the web portion (4) and the widthwise end portion of the backing metal (6) are welded (15) (12) (14) to the column body (2), respectively. In a mounting structure of a shaped steel having a flange portion and a web portion using a backing metal for welding, the flange portion (3) at the joining edge of the web portion (4) is provided.
A groove portion (4a) of the web portion that is flush with the concave groove (5) of the flange portion (3) at a portion corresponding to the connection portion (8) with
However, the tip of the groove (4a) of the web part is formed so as to reach near the back surface of the backing metal (6), and the welding (15) is also applied to the groove (4a) of the web part. Shaped steel mounting structure having a flange portion and a web portion using a characteristic backing metal for welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987120709U JPH0638619Y2 (en) | 1987-08-05 | 1987-08-05 | Shaped steel mounting structure with flange and web using a backing metal for welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987120709U JPH0638619Y2 (en) | 1987-08-05 | 1987-08-05 | Shaped steel mounting structure with flange and web using a backing metal for welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6427192U JPS6427192U (en) | 1989-02-16 |
| JPH0638619Y2 true JPH0638619Y2 (en) | 1994-10-12 |
Family
ID=31367059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987120709U Expired - Lifetime JPH0638619Y2 (en) | 1987-08-05 | 1987-08-05 | Shaped steel mounting structure with flange and web using a backing metal for welding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0638619Y2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4975915U (en) * | 1972-10-17 | 1974-07-02 | ||
| JPS5129505A (en) * | 1974-08-30 | 1976-03-12 | Kazumasa Watanabe | KAARUGUSEBOSHITOKUSEIO SONAETA JIAIKOSEINOSHOZOSHITO SONOSHOSHIHO |
| JPS59194397U (en) * | 1983-06-09 | 1984-12-24 | 株式会社竹中工務店 | Welded structure using a backing metal that doubles as an end tab |
| JPS6055222A (en) * | 1983-09-06 | 1985-03-30 | Mitsui Eng & Shipbuild Co Ltd | Position detector of shield excavator |
-
1987
- 1987-08-05 JP JP1987120709U patent/JPH0638619Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6427192U (en) | 1989-02-16 |
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