JPH11156435A - Manufacture of square steel tube - Google Patents
Manufacture of square steel tubeInfo
- Publication number
- JPH11156435A JPH11156435A JP32299997A JP32299997A JPH11156435A JP H11156435 A JPH11156435 A JP H11156435A JP 32299997 A JP32299997 A JP 32299997A JP 32299997 A JP32299997 A JP 32299997A JP H11156435 A JPH11156435 A JP H11156435A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- corner
- curvature
- stand
- square
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はロールを用いて丸管
から角鋼管を製造する方法において、角鋼管のコーナー
Ｒを目標値通りに制御し、寸法精度の優れた角鋼管を得
る角鋼管の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a square steel pipe from a round pipe using a roll, wherein the corner R of the square steel pipe is controlled to a target value to obtain a square steel pipe having excellent dimensional accuracy. It relates to a manufacturing method.
【０００２】[0002]
【従来の技術】素材鋼帯を複数段の丸形成形ロールでオ
ープン管状に成形し、このオープン管の両エッジを電縫
溶接して丸鋼管とし、更に、この丸鋼管を複数段の角形
成形ロールに通して角鋼管を得る技術がある。このよう
な角鋼管製造方法において、従来、角鋼管のコーナーＲ
を制御する技術は知られていない。2. Description of the Related Art A material steel strip is formed into an open tubular shape by a plurality of rounded rolls, and both edges of the open pipe are welded by electric resistance welding to form a round steel pipe. There is a technique to obtain a square steel pipe through a roll. In such a method for manufacturing a square steel pipe, conventionally, a corner R of a square steel pipe is conventionally used.
There is no known technique for controlling the pressure.
【０００３】[0003]
【発明が解決しようとする課題】角鋼管は用途上、各サ
イズ毎に所定のコーナーＲ値を要求される。しかし従
来、角鋼管の各サイズ毎に、目標のコーナーＲを得るた
めのパススケジュールは不明確であった。このため従来
は、各サイズ毎に何回もテスト造管を行ってパススケジ
ュールを決定しており膨大な時間と費用がかかってい
る。また、新規サイズの鋼管に対して、すぐに対応でき
ないという問題点もある。A square steel pipe is required to have a predetermined corner R value for each size for use. However, conventionally, the pass schedule for obtaining the target corner R has been unclear for each size of the square steel pipe. For this reason, conventionally, a test pipe is performed many times for each size to determine a pass schedule, which requires enormous time and cost. Another problem is that it is not possible to immediately respond to a new size steel pipe.
【０００４】本発明は、このような問題点を解決した角
鋼管の製造方法を提供することを目的とする。[0004] It is an object of the present invention to provide a method for manufacturing a square steel pipe which solves such problems.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記課題を解
決するために開発されたもので、ロール成形により丸鋼
管から角鋼管を製造するに当り、角成形スタンドの中
で、母管である丸鋼管の曲率の５０％以下の曲率のロー
ルカリバーを有する最先のスタンドの入側の管外周Ｌｉ
が、下記（１）、（２）式の範囲になるように、前記最
先のスタンドより上流側のスタンドの圧延条件を設定し
て角成形を行うことを特徴とする角鋼管の製造方法であ
る。DISCLOSURE OF THE INVENTION The present invention has been developed to solve the above-mentioned problems. In producing a square steel pipe from a round steel pipe by roll forming, the present invention is applied to a base pipe in a square forming stand. Outer pipe circumference Li on the entry side of the earliest stand having a roll caliber with a curvature of 50% or less of the curvature of a round steel pipe
However, in the method for producing a square steel pipe, the rolling conditions of the stand on the upstream side of the earliest stand are set and the square forming is performed so as to fall within the ranges of the following expressions (1) and (2). is there.
【０００６】[0006]
【数３】 (Equation 3)
【０００７】[0007]
【数４】 (Equation 4)
【０００８】ただし、 Ｌｉ：管外周長（ｍｍ） Ｈ ：角鋼管外径（ｍｍ） ｔ ：板厚（ｍｍ） ｋ ：充満率 Ｒ ：外コーナーＲ（ｍｍ） ａ1 ，ａ2 ；ｂ1 ，ｂ2 ；ｃ1 ，ｃ2 ；ｄ1 ，ｄ2 ：定
数 また上記の場合に、前記曲率５０％に代り、曲率４０％
以下のロールカリバーを有する最先のスタンドとすると
好適である。[0008] However, Li: Kangaishu length (mm) H: square steel pipe outer diameter (mm) t: plate thickness (mm) k: filling ratio R: outer corner R (mm) a 1, a 2; b 1, b 2 ; c 1 , c 2 ; d 1 , d 2 : constants In the above case, the curvature is 40% instead of the curvature 50%.
It is preferable to use the earliest stand having the following roll calipers.
【０００９】まず始めに、鋼管の角穴型への充満率ｋ
を、周長Ｌの鋼管が角穴型に最充満した場合の四角形の
辺長に対する、外径Ｈの角鋼管の辺長の比率で定義し、
角鋼管の外径をＨ、周長をＬとして以下の式で表わす。[0009] First, the filling rate k of the steel pipe into the square hole type
Is defined as a ratio of the side length of the square steel pipe having the outer diameter H to the side length of the square when the steel pipe having the circumference L is filled with the square hole type,
The outer diameter of the square steel pipe is represented by H, and the circumferential length is represented by L, by the following formula.
【００１０】[0010]
【数５】 (Equation 5)
【００１１】発明者らは、研究の結果、以下の事項を見
出した。 （１）角成形ロールの曲率が、母管である丸形鋼管の曲
率の５０％以下、より好ましくは４０％以下の場合、角
鋼管のコーナー部が主に形成され、鋼管全体の周長の減
少はわずかである。 （２）従って、外コーナーＲと前記角形成スタンド入側
の鋼管周長Ｌｉを用いて（１）式で計算される充満率ｋ
は良い相関関係がある。The inventors have found the following matters as a result of research. (1) When the curvature of the square forming roll is 50% or less, more preferably 40% or less of the curvature of the round steel pipe as the mother pipe, the corner portion of the square steel pipe is mainly formed, and the circumferential length of the entire steel pipe is reduced. The decrease is slight. (2) Accordingly, the filling rate k calculated by the equation (1) using the outer corner R and the steel pipe circumference Li on the side of the corner forming stand.
Have a good correlation.
【００１２】（３）また、外コーナーＲとの充満率ｋの
関係は、角鋼管の外径と肉厚の比よって異なる。
（２），（３）のことから ｋ＝ｆ（Ｒ，ｔ／Ｈ） ……（３） であり、Ｒの代わりにＲ／ｔを用いて（３）式を具体的
に(3) The relationship between the filling rate k and the outer corner R differs depending on the ratio between the outer diameter and the wall thickness of the square steel pipe.
From (2) and (3), k = f (R, t / H) (3), and the equation (3) is specifically described using R / t instead of R.
【００１３】[0013]
【数６】 (Equation 6)
【００１４】Ｌｉ：管外周長（ｍｍ） Ｈ ：角鋼管外径（ｍｍ） ｔ ：板厚（ｍｍ） ｋ ：充満率 Ｒ ：外コーナーＲ（ｍｍ） と仮定して、実験によりｋとＲ／ｔ，ｔ／Ｈの関係を求
めたところ（４）式の係数として以下の値が得られた。Li: pipe outer peripheral length (mm) H: square steel pipe outer diameter (mm) t: plate thickness (mm) k: filling rate R: outer corner R (mm) When the relationship between t and t / H was determined, the following values were obtained as the coefficients of the equation (4).
【００１５】ａ＝１．０６１９〜１．０８６９ ｂ＝−０．０３７２ ｃ＝３．３１８３〜３．７１８３ ｄ＝−２．４８４７ 従って、充満率ｋは、外コーナーＲ、角鋼管外径Ｈ、肉
厚ｔに対して以下の関係がある。A = 1.0619 to 1.0869 b = −0.0372 c = 3.3183 to 3.7183 d = −2.4847 Accordingly, the filling rate k is determined by the outer corner R, the outer diameter H of the square steel pipe, There is the following relationship with the wall thickness t.
【００１６】[0016]
【数７】 (Equation 7)
【００１７】ａ1 ＝１．０６１９ ａ2 ＝１．０８６９ ｂ1 ＝ｂ2 ＝−０．０３７２ ｃ1 ＝３．３１８３ ｃ2 ＝３．７１８３ ｄ1 ＝ｄ2 ＝−２．４８４７ Ｌｉ：管外周長（ｍｍ） Ｈ ：角鋼管外径（ｍｍ） ｔ ：板厚（ｍｍ） ｋ ：充満率 Ｒ ：外コーナーＲ（ｍｍ） 一方、（１）式から鋼管周長Ｌｉは次式で表わされる。A 1 = 1.0619 a 2 = 1.0869 b 1 = b 2 = −0.0372 c 1 = 3.3183 c 2 = 3.7183 d 1 = d 2 = −2.4847 Li: tube Outer peripheral length (mm) H: Square steel pipe outer diameter (mm) t: Plate thickness (mm) k: Filling rate R: Outer corner R (mm) On the other hand, from the formula (1), the steel pipe circumferential length Li is represented by the following formula. .
【００１８】[0018]
【数８】 (Equation 8)
【００１９】従って、角鋼管外径、肉厚、目標の外コー
ナーＲから、（２）式を用いて充満率ｋの範囲を決定
し、そのｋを（５）式に代入して得られた範囲にＬｉを
設定して角成形を実施すれば、目標の外コーナーＲが得
られる。ここでＬｉは、母管である丸形鋼管の曲率の５
０％以下、より好ましくは４０％以下の曲率で構成され
るロールカリバーを有する一連のスタンド群の入側の管
外周長である。ここで母管の曲率の５０％以下、好まし
くは４０％以下の曲率とした理由は次のとおりである。
角成形のロールは通常、母管である丸形鋼管に対する曲
率が大きい順に並んでいる。そこで、各曲率のロール入
側の管外周長Ｌｉに対して充満率ｋを計算し、図３に示
すように外コーナーＲとの相関係数γを求めた。母管曲
率の５０％のロールの入側の管外周長をＬｉ０．５と表
記することにして、各々のロールの入側の管外周長にお
いて、外コーナーＲとの相関係数γを比較すると図４に
示すようであり、Ｌｉ０．５とＬｉ０．４が外コーナー
Ｒとの相関係数が実用的なレベルの０．９以上であるた
め、本発明の入側周長として採用するロールカリバーの
曲率を５０％以下、好ましくは４０％以下に限定した。Accordingly, the range of the filling rate k is determined from the outer diameter, wall thickness, and the target outer corner R of the square steel pipe by using the equation (2), and k is substituted into the equation (5). If Li is set in the range and corner forming is performed, a target outer corner R can be obtained. Here, Li is 5 of the curvature of the round steel pipe as the mother pipe.
It is the pipe outer peripheral length on the entry side of a series of stands having a roll caliber configured with a curvature of 0% or less, more preferably 40% or less. Here, the reason why the curvature is set to 50% or less, preferably 40% or less of the curvature of the mother pipe is as follows.
The square forming rolls are usually arranged in descending order of curvature with respect to a round steel pipe as a mother pipe. Therefore, the filling rate k was calculated with respect to the tube outer peripheral length Li on the roll entry side of each curvature, and the correlation coefficient γ with the outer corner R was obtained as shown in FIG. When the pipe outer peripheral length on the entry side of a roll having 50% of the mother pipe curvature is denoted as Li0.5, and the correlation coefficient γ with the outer corner R is compared for the pipe outer peripheral length on the entry side of each roll. As shown in FIG. 4, since the correlation coefficient between Li0.5 and Li0.4 with the outer corner R is 0.9 or more, which is a practical level, the roll caliber employed as the entry-side circumference of the present invention. Is limited to 50% or less, preferably 40% or less.
【００２０】次に、Ｌｉを限定範囲内に制御する具体的
手段は次の通りである。丸形母管の曲率の５０％以下、
より好ましくは４０％以下の曲率で構成されるロールカ
リバーを有する一連のスタンド群の入側の管外周長Ｌｉ
は、帯幅の調整および上流の丸管成形と角成形の当該周
長の前までの絞り率を調整することにより所定の範囲内
に制御することができる。Next, specific means for controlling Li within a limited range is as follows. 50% or less of the curvature of the round mother pipe,
More preferably, the pipe outer peripheral length Li on the entry side of a series of stands having a roll caliber having a curvature of 40% or less.
Can be controlled within a predetermined range by adjusting the band width and adjusting the drawing ratio up to the perimeter of the round tube forming and the square forming at the upstream.
【００２１】[0021]
【発明の実施の形態】図１に示す丸形電縫鋼管製造設備
ので鋼帯１Ａを鋼管管成形ロール１１、１２を経て中空
素管とし溶接１３後スクイズロール１４で成形し、ビー
ド切削１５を経て丸鋼管１Ｂを製造する。製造した丸鋼
管１Ｂを図２に示すスクイズ装置１６を経て角成形ロー
ル群３０を有するスタンド１７〜２０を連続配置した角
鋼管製造設備供給し、Ｒ1 ，Ｒ2 ，Ｒ3 ，Ｒ4 の成形を
施し、角鋼管２を成形した。このとき、角成形スタンド
１７〜２０のロールカリバーを種々変更して、各種寸法
の角鋼管を製造し、製品角鋼管２の外コーナーＲを測定
した。その結果を表１に示した。BEST MODE FOR CARRYING OUT THE INVENTION A steel strip 1A is made into a hollow shell through steel pipe tube forming rolls 11 and 12 after welding 13 and formed by a squeeze roll 14 after welding 13 in a round electric resistance welded steel pipe manufacturing facility shown in FIG. After that, the round steel pipe 1B is manufactured. The manufactured round steel pipe 1B is supplied through a squeezing device 16 shown in FIG. 2 to a square steel pipe manufacturing facility in which stands 17 to 20 having a group of square forming rolls 30 are continuously arranged to form R 1 , R 2 , R 3 and R 4 . And a square steel pipe 2 was formed. At this time, by changing the roll calipers of the square forming stands 17 to 20 variously, square steel pipes of various dimensions were manufactured, and the outer corner R of the product square steel pipe 2 was measured. The results are shown in Table 1.
【００２２】表１によれば、母管である丸形鋼管の曲率
の５０％以下の曲率で構成されるロールカリバーを有す
る最先のスタンドの入側の管外周長Ｌｉを、上記
（１）、（２）式の範囲を満足する値に設定して角成形
を行った製品は、実際の外コーナーＲがほぼ目標通りに
得られている。According to Table 1, the pipe outer peripheral length Li on the entry side of the earliest stand having the roll caliber having a curvature of 50% or less of the curvature of the round steel pipe as the mother pipe is defined by the above (1). , (2), the actual outer corner R of the product subjected to the corner shaping with the value set to satisfy the range of the expression is almost as intended.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【発明の効果】従って本発明によれば、従来方法に比べ
て、角鋼管の製造において狙いの外コーナーＲを精度良
く、迅速に得ることが可能である。As described above, according to the present invention, the target outer corner R can be accurately and quickly obtained in the production of a square steel pipe, as compared with the conventional method.
【図１】丸形電縫鋼管製造装置の説明図である。FIG. 1 is an explanatory view of a round electric resistance welded steel pipe manufacturing apparatus.
【図２】角形電縫鋼管製造装置の説明図である。FIG. 2 is an explanatory view of a square electric resistance welded steel pipe manufacturing apparatus.
【図３】外コーナーＲと充満率ｋとの関係を示すグラフ
である。FIG. 3 is a graph showing a relationship between an outer corner R and a filling rate k.
【図４】入側周長Ｌｉと相関係数γとの関係を示すグラ
フである。FIG. 4 is a graph showing a relationship between an entrance side circumference Li and a correlation coefficient γ.
１Ａ 鋼帯 １Ｂ 丸鋼管 ２ 角鋼管 １１，１２ 鋼管成形ロール １３ 溶接 １４ スクイズロール １５ ビード切削 １６ スクイズ装置 １７〜２０ リシェーピングロール ３０ 角成形ロール群 DESCRIPTION OF SYMBOLS 1A Steel strip 1B Round steel pipe 2 Square steel pipe 11, 12 Steel pipe forming roll 13 Welding 14 Squeeze roll 15 Bead cutting 16 Squeeze device 17-20 Reshaping roll 30 Square forming roll group
Claims (2)
造するに当り、角成形スタンドの中で、母管である丸鋼
管の曲率の５０％以下の曲率のロールカリバーを有する
最先のスタンドの入側の管外周Ｌｉが、下記（１）、
（２）式の範囲になるように該最先のスタンドより上流
側のスタンドの圧延条件を設定して角成形を行うことを
特徴とする角鋼管の製造方法。 【数１】 【数２】 ただし、 Ｌｉ：管外周長（ｍｍ） Ｈ ：角鋼管外径（ｍｍ） ｔ ：板厚（ｍｍ） ｋ ：充満率 Ｒ ：外コーナーＲ（ｍｍ） ａ1 ，ａ2 ；ｂ1 ，ｂ2 ；ｃ1 ，ｃ2 ；ｄ1 ，ｄ2 ：定
数In producing a square steel pipe from a round steel pipe by roll forming, a first stand having a roll caliber having a curvature of 50% or less of a curvature of a round steel pipe as a mother pipe in a square forming stand. The pipe outer circumference Li on the entry side has the following (1),
A method for manufacturing a square steel pipe, comprising setting a rolling condition of a stand on an upstream side of the earliest stand so as to fall within the range of the expression (2) and performing square forming. (Equation 1) (Equation 2) However, Li: Kangaishu length (mm) H: square steel pipe outer diameter (mm) t: plate thickness (mm) k: filling ratio R: outer corner R (mm) a 1, a 2; b 1, b 2; c 1 , c 2 ; d 1 , d 2 : constant
ることを特徴とする請求項１記載の角鋼管の製造方法。2. The method according to claim 1, wherein the curvature is 40% instead of the curvature of 50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32299997A JP3982887B2 (en) | 1997-11-25 | 1997-11-25 | Square steel pipe manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32299997A JP3982887B2 (en) | 1997-11-25 | 1997-11-25 | Square steel pipe manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11156435A true JPH11156435A (en) | 1999-06-15 |
| JP3982887B2 JP3982887B2 (en) | 2007-09-26 |
Family
ID=18150016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32299997A Expired - Fee Related JP3982887B2 (en) | 1997-11-25 | 1997-11-25 | Square steel pipe manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3982887B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006150377A (en) * | 2004-11-26 | 2006-06-15 | Nakata Mfg Co Ltd | Square tube forming roll, square tube rolling method and device therefor |
| WO2019176979A1 (en) * | 2018-03-16 | 2019-09-19 | Ｊｆｅスチール株式会社 | Method for manufacturing square steel tube, and square steel tube |
| WO2021039484A1 (en) * | 2019-08-30 | 2021-03-04 | Ｊｆｅスチール株式会社 | Rectangular steel pipe and method for manufacturing same, and building structure |
| CN112828070A (en) * | 2020-12-31 | 2021-05-25 | 燕山大学 | Cold bending forming process of square and rectangular pipe |
| JP2023036009A (en) * | 2021-08-30 | 2023-03-13 | 武漢理工大学 | Elbow production method and system |
-
1997
- 1997-11-25 JP JP32299997A patent/JP3982887B2/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7921688B2 (en) | 2004-11-26 | 2011-04-12 | Nakata Manufacturing Co., Ltd. | Square tube forming roll, square tube forming method, and forming device |
| JP2006150377A (en) * | 2004-11-26 | 2006-06-15 | Nakata Mfg Co Ltd | Square tube forming roll, square tube rolling method and device therefor |
| CN111836688B (en) * | 2018-03-16 | 2022-09-13 | 杰富意钢铁株式会社 | Method for manufacturing square steel pipe and square steel pipe |
| WO2019176979A1 (en) * | 2018-03-16 | 2019-09-19 | Ｊｆｅスチール株式会社 | Method for manufacturing square steel tube, and square steel tube |
| JPWO2019176979A1 (en) * | 2018-03-16 | 2020-04-23 | Ｊｆｅスチール株式会社 | Method for manufacturing square steel pipe and square steel pipe |
| TWI700136B (en) * | 2018-03-16 | 2020-08-01 | 日商Ｊｆｅ鋼鐵股份有限公司 | Square steel pipe manufacturing method and square steel pipe |
| CN111836688A (en) * | 2018-03-16 | 2020-10-27 | 杰富意钢铁株式会社 | Method for manufacturing square steel pipe and square steel pipe |
| WO2021039484A1 (en) * | 2019-08-30 | 2021-03-04 | Ｊｆｅスチール株式会社 | Rectangular steel pipe and method for manufacturing same, and building structure |
| JPWO2021039484A1 (en) * | 2019-08-30 | 2021-09-27 | Ｊｆｅスチール株式会社 | Square steel pipe and its manufacturing method and building structure |
| JP2022033802A (en) * | 2019-08-30 | 2022-03-02 | Ｊｆｅスチール株式会社 | Square steel tube and building structure |
| CN112828070B (en) * | 2020-12-31 | 2022-02-11 | 燕山大学 | Cold bending forming process of square and rectangular pipe |
| CN112828070A (en) * | 2020-12-31 | 2021-05-25 | 燕山大学 | Cold bending forming process of square and rectangular pipe |
| JP2023036009A (en) * | 2021-08-30 | 2023-03-13 | 武漢理工大学 | Elbow production method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3982887B2 (en) | 2007-09-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104624723B (en) | The control method of movable pinch roll during strip coiling | |
| JPH11156435A (en) | Manufacture of square steel tube | |
| WO2004085086A1 (en) | Method of manufacturing seamless tube | |
| JP2007528298A (en) | Roller leveler with variable center distance | |
| CN107350301A (en) | The processing technology of omega seamless steel pipe | |
| JPS61115614A (en) | Production of square tube | |
| JPH0256964B2 (en) | ||
| JP4661370B2 (en) | ERW steel pipe manufacturing method | |
| JPH01162518A (en) | Method for setting controlled variable of hot strainer | |
| JPS63268507A (en) | Control method for outer diameter of metal pipe | |
| RU2243045C2 (en) | Method for calibrating rolls of pilger mills for rolling thin-wall tubes | |
| JPS603904A (en) | Shape steel sheet having thick part at both ends and manufacture thereof | |
| JP2000288616A (en) | Manufacture of seamless steel tube | |
| JPS60206507A (en) | Method for rolling seamless steel pipe by mandrel mill system | |
| JPS6023888B2 (en) | How to control the reduction of Leela Mill | |
| RU1811933C (en) | Method of making helical-seam thick-wall corrugated tubes | |
| RU2019326C1 (en) | Method of cold reduction of welded tubes and cable casing | |
| SU1031609A1 (en) | Apparatus for helical rolling of finned tubes | |
| JP2001259709A (en) | Method and device for rolling seamless steel tube | |
| RU2020009C1 (en) | Method for forming pipe billet | |
| RU2015755C1 (en) | Method for cold reduction in cross-sectional area of welded pipe products | |
| JPH033526B2 (en) | ||
| SU1488044A1 (en) | Method of reduction in cross-sectional area of tubes with tension | |
| RU1819695C (en) | Method to roll shapes with thin-wall flanges | |
| JPS6142428A (en) | Method and device for forming pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20040608 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20040809 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040914 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20041112 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050119 |
|
| A911 | Transfer of reconsideration by examiner before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20050124 |
|
| A912 | Removal of reconsideration by examiner before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A912 Effective date: 20050210 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070524 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20070703 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100713 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100713 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110713 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110713 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120713 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120713 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130713 Year of fee payment: 6 |
|
| LAPS | Cancellation because of no payment of annual fees |