JPH0455093A - Rotary supporting device - Google Patents
Rotary supporting deviceInfo
- Publication number
- JPH0455093A JPH0455093A JP16710490A JP16710490A JPH0455093A JP H0455093 A JPH0455093 A JP H0455093A JP 16710490 A JP16710490 A JP 16710490A JP 16710490 A JP16710490 A JP 16710490A JP H0455093 A JPH0455093 A JP H0455093A
- Authority
- JP
- Japan
- Prior art keywords
- elongated body
- contact
- force
- lifting
- support
- 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.)
- Pending
Links
- 230000002265 prevention Effects 0.000 claims description 16
- 230000003028 elevating effect Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
長尺体は、一般に、その軸心を横に向けた状態にして、
その外周部を回転支持体で受止めて軸心周りに回転させ
ると、外径が長手方向で少し異っていたり、軸心か若干
類いていたりする場合には、軸心方向に移動しようとす
る歩み現象が発生しやすい。そこで本発明は、長尺体の
軸心をほぼ水平に向けた状態で、前記長尺体を、前記軸
心周りに回転自在に支持する回転支持体が、前記長尺体
の長手方向複数箇所に配置され、前記長尺体の回転に伴
う前記軸心方向の一方側への移動を規制する歩み防止装
置が設けられている回転支持装置に関する。[Detailed Description of the Invention] [Industrial Field of Application] Generally, an elongated body has its axis oriented laterally,
When the outer circumference is received by a rotating support and rotated around the axis, if the outer diameter is slightly different in the longitudinal direction or the axis is slightly similar, it may try to move in the axial direction. This phenomenon is likely to occur. Therefore, the present invention provides a rotary support that supports the elongate body rotatably around the axis in a state where the axis of the elongate body is oriented substantially horizontally at a plurality of locations in the longitudinal direction of the elongate body. The present invention relates to a rotation support device that is provided with a step prevention device that is disposed on the elongated body and restricts movement toward one side in the axial direction as the elongated body rotates.
従来、長尺体用の回転支持装置においては、長尺体を回
転自在に支持する回転支持体が、前記長尺体の長手方向
複数箇所に配置されるとともに、前記長尺体の回転に伴
う軸心方向の一方への移動を規制するために、前記歩み
防止装置として長尺体の端部を当て付けるストッパが設
けられてるだけであった。Conventionally, in a rotational support device for an elongated body, rotational supports that rotatably support the elongated body are arranged at a plurality of locations in the longitudinal direction of the elongated body. In order to restrict movement in one direction in the axial direction, a stopper against which the end of the elongated body abuts is simply provided as the step prevention device.
しかし、長尺体の回転に伴う軸心方向の一方への移動を
、ストッパに当て付は規制すると、前記長尺体から前記
ストッパに対して圧接力が働くに伴って、回転支持体に
は、前記長尺体を介して前記ストッパからの反力が働く
。この場合、前記長尺体と前記回転支持体との間には、
前記軸心方向に沿った大きな摩擦力が働く。その結果、
回転・支持体の前記長尺体支持部表面の摩耗が早く進ん
で寿命が短くなり回転支持体を早期に交換しなければな
らず、不経済であるという問題があった。However, if the movement of the elongated body in one direction in the axial direction as the elongated body rotates is restricted from abutting against the stopper, as pressure is applied from the elongated body to the stopper, the rotating support , a reaction force from the stopper acts via the elongated body. In this case, between the elongated body and the rotating support,
A large frictional force acts along the axial direction. the result,
There has been a problem in that the surface of the elongated body support portion of the rotary support body is rapidly worn out, resulting in a shortened service life and the rotary support body must be replaced at an early stage, which is uneconomical.
本発明は上記欠点を解消し、長尺体の回転に伴う軸心方
向の一方への移動を、経済性よく阻止できる回転支持装
置を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a rotation support device that can economically prevent the elongated body from moving in one direction in the axial direction as it rotates.
上記目的を達成するため本発明は、歩み防止装置を構成
するに、回転に伴って軸心に沿った方向へ移動する長尺
体に接当する接当部を設け、前記接当部近くの前記長尺
体の端部を昇降させる昇降支持部を設け、前記長尺体の
前記接当部に対する接当に伴って前記端部が上昇するよ
うに、前記長尺体の前記接当部に対する接当力を、前記
昇降支持部における上昇操作力として伝達する力伝達手
段を設けてあることを特徴としている。In order to achieve the above object, the present invention constitutes a step prevention device, and includes a contact portion that contacts a long body that moves in a direction along the axis as the body rotates, and a contact portion near the contact portion. An elevating support part for raising and lowering the end of the elongate body is provided, and the elongate body is provided with a lifting support part for raising and lowering the end of the elongate body, so that the end part rises as the elongate body comes into contact with the abutting part. The present invention is characterized in that a force transmitting means is provided for transmitting the contact force as a lifting operation force in the lifting support section.
つまり、歩み現象が働いて長尺体が軸心方向の一方側へ
移動して歩み防止装置の接当部に接当すると、その接当
力は、力伝達手段によって昇降支持部に上昇操作力とし
て伝えられ、この昇降支持部が前記長尺体の端部を上昇
させる。In other words, when the elongated body moves to one side in the axial direction due to the step phenomenon and comes into contact with the contact part of the step prevention device, the contact force is transferred to the lifting support part by the force transmission means to cause the lifting operation force. This lifting support section raises the end of the elongated body.
前記端部の上昇量は、前記接当力に対応した値となり、
接当力が大きければ上昇量も大きくなる。The amount of rise of the end portion is a value corresponding to the contact force,
The greater the contact force, the greater the amount of rise.
前記長尺体の端部が上昇するに伴って、長尺体の自重に
対する前記軸心方向に沿った分力が、長尺体の歩み方向
とは逆向きに生じかけ、前記軸心方向の一方側への移動
を生じさせる長尺体歩み力は、前記分力の量だけ減少す
る。その結果、前記接当力か小さくなって、前記回転支
持体が受ける前記歩み防止装置からの反力も小さくなる
。また、前記上昇操作力も小さくなり、結局、前記端部
は、長尺体の自重に抗して上昇せずにバランスのとれた
高さ位置で安定する。As the end of the elongated body rises, a component force along the axial direction relative to the elongated body's own weight begins to be generated in the opposite direction to the walking direction of the elongated body, and the force in the axial direction increases. The elongated body walking force that causes the movement to one side is reduced by the amount of said component force. As a result, the contact force becomes smaller, and the reaction force from the anti-stepping device that the rotary support receives also becomes smaller. Further, the lifting operation force is also reduced, and the end portion is stabilized at a balanced height position without rising against the weight of the elongated body.
上記のように、本発明に係る回転支持装置では、前記長
尺体の回転に伴って、前記長尺体を前記軸心方向へ移動
させる力が生じると、上述したような運動が繰り返され
、前記軸心方向への移動を阻止しながらも、前記回転支
持体に働く反力は常に減少させられるようになっている
ため、前記長尺体に働く摩擦力は小さくなる。As described above, in the rotation support device according to the present invention, when a force is generated to move the elongate body in the axial direction as the elongate body rotates, the above-mentioned movement is repeated, Although the movement in the axial direction is prevented, the reaction force acting on the rotary support body is always reduced, so that the frictional force acting on the elongated body becomes small.
従って、回転支持体の長尺体支持部表面の摩耗の進みが
抑制され、前記長尺体支持部表面の寿命が長（なり、メ
ンテナンスをしばしば行う必要がなくなった、また、新
たな動力を用いることなく、長尺体自身の移動力を利用
してその移動を防止するため。消費エネルギーが節約で
き、さらに長尺体と回転支持体との間の摩擦で失われる
動力も少なくなって、全体としてのランニングコストを
安くすることができた。その結果、長尺体の回転に伴う
軸心方向の一方への移動を、経済性よく阻止できる回転
支持装置を提供することができた。Therefore, the progression of wear on the surface of the elongate body support part of the rotary support is suppressed, and the life of the elongate body support part surface is extended (this eliminates the need for frequent maintenance. This prevents the movement of the elongated body by using its own moving force.It saves energy consumption, and also reduces the power lost due to friction between the elongated body and the rotating support. As a result, it was possible to provide a rotation support device that can economically prevent the elongated body from moving in one direction in the axial direction as it rotates.
第１図に、長尺体としての円筒状の土木用パイル（１）
を、アーク溶接機（２）で全周突合せ自動溶接する加工
装置が示されている。前記アーク溶接機（２）は地面に
対して固定されており、回転支持装置（３）で前記長尺
体としてのパイル（１）を回転させながら全周を溶接す
る。Figure 1 shows a cylindrical civil engineering pile (1) as a long body.
A processing device is shown that automatically butt-welds the entire circumference using an arc welder (2). The arc welding machine (2) is fixed to the ground, and welds the entire circumference of the pile (1) as the elongated body while rotating it with a rotary support device (3).
前記回転支持装置（３）は、軸心（Ｐ）を横方向に向け
たパイル（１）を駆動回転させるように支持する回転支
持体（４）と、パイル（１）の回転に伴うパイル（１）
の軸心（Ｐ）方向の一方への移動を、パイル（１）との
接当によって規制する歩み防止装置（５）とからなり、
回転支持体（４）を、パイル（１）の軸心（Ｐ）方向の
２箇所に並べて設けるとともに、歩み防止装置（５）に
、パイル（１）の一端面を接当させてある。The rotation support device (3) includes a rotation support body (4) that supports the pile (1) with the axis (P) oriented in the horizontal direction so as to drive and rotate the pile (1), and a rotation support body (4) that supports the pile (1) with the axis (P) oriented in the horizontal direction. 1)
a step prevention device (5) that restricts movement in one direction in the axial center (P) direction by contact with the pile (1);
Rotating supports (4) are arranged side by side at two locations in the direction of the axis (P) of the pile (1), and one end surface of the pile (1) is brought into contact with the walking prevention device (5).
前記回転支持体（４）は、支持本体（６）の上部に、２
個の回転ローラー（７）を備えている。このローラー（
７）は、第２図に示すように前記パイル（１）の周方向
に２個配置してある。そして、モーター（Ｍ）で一方の
ローラー（７）を駆動回転させて、前記ローラー（７）
上のパイル（１）を、その軸芯（Ｐ）周りに回転させる
。前記支持本体（６）の下部には車輪（９）を設けてあ
り、この車輪（９）を、パイル（１）の軸心（Ｐ）方向
に沿って設けられたレール（１０）上に載置し、もって
再回転支持体（４）、 （４）によるパイル（１）の支
持間隔を自在に変更操作できるようにしてある。従って
、パイル（１）の長短に応じて支持間隔の調整を短時間
で正確に行える。The rotation support body (4) has two parts on the top of the support body (6).
It is equipped with several rotating rollers (7). This roller (
7) are arranged in two circumferential directions of the pile (1) as shown in FIG. Then, one roller (7) is driven and rotated by the motor (M), and the roller (7) is rotated.
Rotate the upper pile (1) around its axis (P). A wheel (9) is provided at the lower part of the support body (6), and this wheel (9) is mounted on a rail (10) provided along the axis (P) direction of the pile (1). The support interval of the pile (1) by the re-rotation supports (4), (4) can be freely changed. Therefore, the support interval can be adjusted accurately in a short time depending on the length of the pile (1).
つまり第２図及び第３図に示すように、前記車輪（９）
は、支持本体（６）に対して上下方向に出退自在になっ
ており、車輪（９）と支持本体（６）との間には支持本
体（６）を上方に付勢するばね（１１）を設けてあり、
ローラー（７）上にパイル（１）を載置していない場合
は、第３図に示すようにばね（１１）によって支持本体
（６）を地面から上方に浮かせてレール（１０）上を自
由に移動できるようにし、ローラー（７）上にパイル（
１）が載置されると、その重量によって支持本体（６）
が下降して接地し、レール上を移動不能にするのである
。That is, as shown in FIGS. 2 and 3, the wheel (9)
is capable of moving up and down with respect to the support body (6), and a spring (11) is provided between the wheel (9) and the support body (6) to bias the support body (6) upward. ) is provided,
If the pile (1) is not placed on the rollers (7), the support body (6) is floated upward from the ground by the spring (11) as shown in Figure 3, and is freely moved on the rail (10). The pile (
1) is placed, the weight of the support body (6)
It descends and touches the ground, making it impossible to move on the rail.
第１図に示すように、基台（８）に、力伝達手段として
のＬ字形状のてこ部材（１３）を、枢支軸（Ｑ）周りに
揺動自在に枢支連結し、てこ部材（１３）に、パイル（
１）の端面に接当する接当部（５Ａ）と、パイル（１）
の周壁に接当する昇降支持部（５Ｂ）とを設けて歩み防
止装置（５）を構成してある。また、前記接当部（５Ａ
）と前記昇降支持部（５Ｂ）には、パイル（１）と接当
してパイル（１）の回転を円滑に行なわせるためのロー
ラー（５Ｄ）を設けてある。As shown in FIG. 1, an L-shaped lever member (13) serving as a force transmission means is pivotally connected to the base (8) so as to be swingable around a pivot shaft (Q). In (13), pile (
The contact part (5A) that contacts the end face of 1) and the pile (1)
A step prevention device (5) is constructed by providing a lifting support portion (5B) that comes into contact with the peripheral wall of the foot. In addition, the contact portion (5A
) and the lifting support section (5B) are provided with rollers (5D) that come into contact with the pile (1) to ensure smooth rotation of the pile (1).
上記構成において、前記接当部（５Ａ）に、パイル（１
）の端部が接当すると、てこ部材（１３）はパイル（１
）から受ける接当力によって前記枢支軸（Ｑ）周りに揺
動し、昇降部（５Ｂ）はてこ部材（１３）に取付けられ
ているから接当部（５Ａ）と共に揺動し、パイル（１）
周壁の下部に接当してパイル（１）の端部を上昇させる
。つまり、前記てこ部材（１３）において接当部（５Ａ
）は力点となり昇降支持部（５Ｂ）は作用点となる。そ
して、昇降支持部（５Ｂ）に伝えらた力は、パイル（１
）を上昇させるための上昇操作力として用いられるので
ある。In the above configuration, the pile (1
), the lever member (13) touches the pile (1
), the lifting part (5B) is attached to the lever member (13), so it swings together with the contact part (5A), and the pile ( 1)
The end of the pile (1) is raised by coming into contact with the lower part of the peripheral wall. That is, in the lever member (13), the contact portion (5A
) becomes the point of effort, and the lifting support part (5B) becomes the point of action. Then, the force transmitted to the lifting support part (5B) is applied to the pile (1
) is used as a lifting force to raise the
第４図に示すように、前記ローラー（５Ｄ）に代えて、
歩み防止装置（５）の昇降支持部（５Ｂ）に回転支持体
（４）を設けてもよい。As shown in FIG. 4, instead of the roller (5D),
A rotating support (4) may be provided on the lifting support section (5B) of the step prevention device (5).
第５図に示すように、前記歩み防止装置（５）を油圧機
構によって構成してもよい。つまり、Ｌ字形状の歩み防
止装置本体（１５）に、接当部（５Ａ）と昇降支持部（
５Ｂ）とを形成し、接当部（５Ａ）に受圧シリンダ（５
ａ）を設け、昇降支持部（５Ｂ）に昇降シリンダ（５ｂ
）を設け、前記両シリンダ（５ａ）。As shown in FIG. 5, the step prevention device (5) may be constituted by a hydraulic mechanism. In other words, the L-shaped step prevention device main body (15) has a contact part (5A) and a lifting support part (
5B), and a pressure receiving cylinder (5A) is formed at the contact part (5A).
a), and a lifting cylinder (5b) is provided on the lifting support part (5B).
), and both cylinders (5a).
（５ｂ）の間に、力伝達手段としての接続する接続油路
（１７）を設けて歩み防止装置（５）を構成してある。(5b), a connecting oil passage (17) serving as a force transmission means is provided to constitute a walking prevention device (5).
従って、前記両シリンダ（５ａ）、 （５ｂ）は、接続
油路（１７）を介して連動する。尚受圧シリンダ（５ａ
）と昇降シリンダ（５ｂ）とのパイル（１）に対する接
当面には、パイル（１）の回転を円滑に行なわせるため
のローラー（５Ｄ）を設けてある。Therefore, both the cylinders (5a) and (5b) are interlocked via the connecting oil passage (17). In addition, the pressure receiving cylinder (5a
) and the elevating cylinder (5b) are provided with rollers (5D) on the abutting surfaces of the pile (1) for smooth rotation of the pile (1).
上記構成において、前記受圧シリンダ（５ａ）に、パイ
ル（１）の端部が接当すると、受圧シリンダ（５ａ）は
その接当力によって軸心（Ｐ）に沿った方向に移動し、
前記昇降シリンダ（５ｂ）に、接続油路（１７）を介し
て上向きに油圧が伝わり、前記シリンダ（５ｂ）は、パ
イル（１）の周壁の下部に接当してパイル（１）の端部
を上昇させる。つまり、前記昇降シリンダ（５ｂ）に伝
えらた接当力は、パイル（１）を上昇させるための上昇
操作力として作用する。In the above configuration, when the end of the pile (1) comes into contact with the pressure receiving cylinder (5a), the pressure receiving cylinder (5a) moves in the direction along the axis (P) due to the contact force,
Hydraulic pressure is transmitted upward to the lifting cylinder (5b) via the connecting oil passage (17), and the cylinder (5b) comes into contact with the lower part of the peripheral wall of the pile (1) and lifts the end of the pile (1). to rise. That is, the contact force transmitted to the lifting cylinder (5b) acts as a lifting operation force for lifting the pile (1).
なお、油圧以外の流体圧を利用してもよく、接続油路（
１７）を流体圧回路と総称する。Note that fluid pressure other than hydraulic pressure may be used, and the connecting oil line (
17) are collectively referred to as the fluid pressure circuit.
前記回転支持体（４）は、前記パイル（１）の長手方向
に３箇所以上設けてもよい。The rotating supports (4) may be provided at three or more locations in the longitudinal direction of the pile (1).
本発明にかかる回転装置は、長尺体の全周を自動−溶接
する場合に限らず、例えば長尺体を回転させながら加工
したり検査したりする場合にも応用できる。The rotating device according to the present invention can be applied not only to automatically welding the entire circumference of a long body, but also to processing or inspecting a long body while rotating it, for example.
なお、特許請求の範囲の項に図面との対照を便利にする
ために符号を記すが、この記号により本発明は図面の構
造に限定されるものではない。Note that although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure of the drawings by the reference numerals.
図面は本発明に係る実施例を示し、第１図は溶・接作業
状態を示す正面図、第２図は同側面図、第３図は要部の
側面図、第４図は別実施例の正面図、第５図は別実施例
の断面図である。
（１）・・・・・・長尺体、（１Ａ）・・・・・・長尺
体の端部、（４）・・・・・・回転支持体、（５）・・
・・・・歩み防止装置、（５Ａ）・・・・・・接当部、
（５Ｂ）・・・・・・昇降支持部、（１３）・・・・・
・・・・力伝達手段、（Ｐ）・・・・・・軸心。The drawings show an embodiment according to the present invention, in which Fig. 1 is a front view showing a welding operation state, Fig. 2 is a side view of the same, Fig. 3 is a side view of the main part, and Fig. 4 is a different embodiment. FIG. 5 is a sectional view of another embodiment. (1)... Long body, (1A)... End of the long body, (4)... Rotating support, (5)...
...Step prevention device, (5A) ...Contact part,
(5B)... Lifting support part, (13)...
...Force transmission means, (P) ...Axis center.
Claims (1)
で、前記長尺体（１）を、前記軸心（Ｐ）周りに回転自
在に支持する回転支持体（４）が、前記長尺体（１）の
長手方向複数箇所に配置され、前記長尺体（１）の回転
に伴う前記軸心（Ｐ）方向の一方側への移動を規制する
歩み防止装置（５）が設けられている回転支持装置であ
って、前記歩み防止装置（５）を構成するに、回転に伴
って前記軸心（Ｐ）に沿った方向へ移動する前記長尺体
（１）に接当する接当部（５Ａ）を設け、前記接当部（
５Ａ）近くの前記長尺体（１）の端部（１Ａ）を昇降さ
せる昇降支持部（５Ｂ）を設け、前記長尺体（１）の前
記接当部（５Ａ）に対する接当に伴って前記端部（１Ａ
）が上昇するように、前記長尺体（１）の前記接当部（
５Ａ）に対する接当力を、前記昇降支持部（５Ｂ）にお
ける上昇操作力として伝達する力伝達手段（１３）を設
けてある回転支持装置。 ２、前記力伝達手段（１３）がてこ部材からなり、前記
てこ部材に、力点となる前記接当部（５Ａ）と、作用点
となる前記昇降支持部（５Ｂ）とを形成し、前記てこ部
材を、揺動自在に、枢支軸（Ｑ）を介して枢支して前記
歩み防止装置（５）を形成してある請求項１記載の回転
支持装置。 ３、前記接当部（５Ａ）に受圧シリンダを設け、前記昇
降支持部（５Ｂ）に昇降シリンダを設け、力伝達手段（
１３）として流体圧回路を設け、前記受圧シリンダ（５
Ａ）と前記昇降シリンダ（５Ｂ）とを、前記流体圧回路
を介して連動させてある請求項１記載の回転支持装置。[Claims] 1. The elongated body (1) is supported rotatably around the axis (P) with the axis (P) of the elongated body (1) oriented substantially horizontally. Rotating supports (4) are arranged at a plurality of locations in the longitudinal direction of the elongated body (1) to prevent movement of the elongated body (1) to one side in the direction of the axis (P) as the elongated body (1) rotates. The rotation support device is provided with a step prevention device (5) that regulates the step, and the step prevention device (5) is configured such that the step movement prevention device (5) moves in the direction along the axis (P) as it rotates. A contact portion (5A) that contacts the elongated body (1) is provided, and the contact portion (
5A) A lifting support part (5B) is provided to raise and lower the end (1A) of the elongated body (1) nearby, and as the elongated body (1) comes into contact with the contact part (5A). The end (1A
) of the elongated body (1) so that the contact portion (
5A) is provided with a force transmitting means (13) for transmitting the contact force against the lifting support part (5B) as a lifting operation force. 2. The force transmitting means (13) is made of a lever member, and the lever member is formed with the contact portion (5A) that serves as a point of force and the lifting support portion (5B) that serves as a point of action, and the lever member 2. The rotational support device according to claim 1, wherein said step prevention device (5) is formed by pivotally supporting a member via a pivot shaft (Q) so as to be swingable. 3. A pressure receiving cylinder is provided in the contact portion (5A), an elevating cylinder is provided in the elevating support portion (5B), and a force transmitting means (
13), a fluid pressure circuit is provided as the pressure receiving cylinder (5).
The rotation support device according to claim 1, wherein the lifting cylinder (5B) and the lifting cylinder (5B) are interlocked via the fluid pressure circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16710490A JPH0455093A (en) | 1990-06-26 | 1990-06-26 | Rotary supporting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16710490A JPH0455093A (en) | 1990-06-26 | 1990-06-26 | Rotary supporting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0455093A true JPH0455093A (en) | 1992-02-21 |
Family
ID=15843504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16710490A Pending JPH0455093A (en) | 1990-06-26 | 1990-06-26 | Rotary supporting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0455093A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101432360B1 (en) * | 2012-05-29 | 2014-08-20 | 동부제철 주식회사 | Apparatus for welding automation of steel pipe pile assembly |
-
1990
- 1990-06-26 JP JP16710490A patent/JPH0455093A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101432360B1 (en) * | 2012-05-29 | 2014-08-20 | 동부제철 주식회사 | Apparatus for welding automation of steel pipe pile assembly |
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