JPH05295855A - Manufacture of x-shaped built-up reinforcement - Google Patents

Manufacture of x-shaped built-up reinforcement

Info

Publication number
JPH05295855A
JPH05295855A JP3255592A JP3255592A JPH05295855A JP H05295855 A JPH05295855 A JP H05295855A JP 3255592 A JP3255592 A JP 3255592A JP 3255592 A JP3255592 A JP 3255592A JP H05295855 A JPH05295855 A JP H05295855A
Authority
JP
Japan
Prior art keywords
outside
rebar
reinforcing bar
fixed
shaped
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
Application number
JP3255592A
Other languages
Japanese (ja)
Other versions
JP2779790B2 (en
Inventor
Takayuki Fukushima
孝之 福嶋
Nobukazu Okaji
延一 小梶
Asao Yamamoto
浅夫 山本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Science and Technology Agency
Haseko Corp
Hasegawa Komuten Co Ltd
Original Assignee
Research Development Corp of Japan
Haseko Corp
Hasegawa Komuten Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Research Development Corp of Japan, Haseko Corp, Hasegawa Komuten Co Ltd filed Critical Research Development Corp of Japan
Priority to JP4032555A priority Critical patent/JP2779790B2/en
Publication of JPH05295855A publication Critical patent/JPH05295855A/en
Application granted granted Critical
Publication of JP2779790B2 publication Critical patent/JP2779790B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To easily manufacture an X-shaped built-up reinforcement which is made up by fixing the reinforcements to the inside and the outside of ring plates. CONSTITUTION:In manufacture of an X-shaped built-up reinforcement, of which X-shaped bar arrangement is made up of internal reinforcements 2 that are fixed at their both ends to the inside of a pair of ring plates 1 and 1 and external reinforcements 3 that are fixed at their both ends to the outside of the ring plates 1 and 1, auxiliary rings 7 and 7 are supported with a pair of rotators 8 and 8 that are installed coaxially with the rotational axis P and are capable of making relative movement in the direction of the rotational axis P. Then, the internal reinforcements 2 are fixed at their both ends to the outside of the auxiliary rings 7 and 7 and after that, the ring plates 1 and 1 are fixed to the outside of a batch of the internal reinforcements 2, and then the external reinforcements 3 are fixed at their both ends to the outside of the ring plates 1 and 1.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、X形組立鉄筋の製造方
法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an X-shaped assembled rebar.

【0002】[0002]

【従来の技術】一対のリングプレートの内側に両端側を
固定した内側鉄筋と前記リングプレートの外側に両端側
を固定した外側鉄筋とでX形配筋を構成したX形組立鉄
筋は、リングプレートの外側にのみ鉄筋を固定したX形
組立鉄筋と比べると、鉄筋本数を多くして多方向のX形
配筋を構成する際にも鉄筋同士の当接(干渉)を防止で
きるという利点を有している反面、リングプレートの内
側と外側に鉄筋を固定するため、製造が非常に面倒であ
り、手作業による製造を強いられていた。即ち、一対の
リングプレートに所定本数の内側鉄筋を挿入して、それ
らの両端側をリングプレートの内側に溶接等で固定し、
しかる後、前記リングプレートの外側に外側鉄筋の両端
側を溶接等で固定するといった複雑な製造手順となり、
製造の自動化が困難とされていたのである。
2. Description of the Related Art An X-shaped assembled rebar having an X-shaped rebar composed of an inner rebar having both ends fixed to the inside of a pair of ring plates and an outer rebar having both ends fixed to the outside of the ring plate is a ring plate. Compared with the X-shaped assembly rebars that fix the rebars only on the outside of the, there is an advantage that the rebars can be prevented from abutting (interfering) even when the number of rebars is increased to form a multi-directional X-shaped rebar. On the other hand, since the reinforcing bars are fixed inside and outside the ring plate, the manufacturing is very troublesome, and the manufacturing is forced to be done manually. That is, a predetermined number of inner reinforcing bars are inserted into a pair of ring plates, and both ends of the reinforcing bars are fixed to the inside of the ring plates by welding or the like.
After that, it becomes a complicated manufacturing procedure such as fixing both ends of the outer reinforcing bar to the outside of the ring plate by welding or the like,
It was difficult to automate the manufacturing.

【0003】[0003]

【発明が解決しようとする課題】本発明は、上記の点に
留意してなされたもので、その目的とするところは、リ
ングプレートの内側と外側に鉄筋を固定したX形組立鉄
筋を容易に製造できる製造方法を提供することにある。
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to easily form an X-shaped assembly rebar in which rebars are fixed inside and outside a ring plate. It is to provide a manufacturing method that can be manufactured.

【0004】[0004]

【課題を解決するための手段】上記の課題を解決するた
めに、本発明が講じた技術的手段は、次の通りである。
即ち、本発明によるX形組立鉄筋の製造方法は、一対の
リングプレートの内側に両端側を固定した内側鉄筋と前
記リングプレートの外側に両端側を固定した外側鉄筋と
でX形配筋を構成したX形組立鉄筋を製造するにあた
り、回転軸芯を同じくし且つ回転軸芯方向へ相対移動可
能に構成された一対の回転体に夫々補助リングを支持さ
せ、前記補助リングの外側に内側鉄筋の両端側を仮固定
し、しかる後、内側鉄筋群の外側にリングプレートを固
定し、当該リングプレートの外側に外側鉄筋の両端側を
固定することを特徴としている。
[Means for Solving the Problems] The technical means taken by the present invention to solve the above problems are as follows.
That is, in the method for manufacturing an X-shaped assembled rebar according to the present invention, an X-shaped rebar is composed of an inner rebar having both ends fixed to the inside of a pair of ring plates and an outer rebar having both ends fixed to the outside of the ring plate. In manufacturing the X-shaped assembled rebar, a pair of rotating bodies having the same rotating shaft center and configured to be relatively movable in the rotating shaft core direction respectively support the auxiliary rings, and the inner reinforcing bars are provided outside the auxiliary rings. It is characterized in that both ends are temporarily fixed, then the ring plates are fixed to the outside of the inner reinforcing bar group, and both ends of the outer reinforcing bars are fixed to the outside of the ring plate.

【0005】[0005]

【作用】上記の構成によれば、補助リングの外側に内側
鉄筋を仮固定し、その外側にリングプレートを套嵌して
固定し、リングプレートの外側に外側鉄筋を固定すると
いったように、常に外側からの作業となり、一対のリン
グプレートの内側に内側鉄筋の両端側を挿入するという
面倒な工程がないので、X形組立鉄筋を容易に製造する
ことができる。
According to the above construction, the inner rebar is temporarily fixed to the outer side of the auxiliary ring, the ring plate is fitted and fixed to the outer side of the auxiliary ring, and the outer rebar is fixed to the outer side of the ring plate. Since the work is performed from the outside and there is no troublesome step of inserting both ends of the inner reinforcing bar inside the pair of ring plates, the X-shaped assembled reinforcing bar can be easily manufactured.

【0006】[0006]

【実施例】図1は本発明の一実施例を示す。この実施例
は、一対のリングプレート1,1の内側に両端側を固定
した内側鉄筋2と前記リングプレート1,1の外側に両
端側を固定した外側鉄筋3とでX形配筋を構成し、さら
に、帯鉄筋4、平行主筋5および平行主筋5の帯鉄筋6
を配筋した柱用のX形組立鉄筋Aを、次の工程よりなる
方法によって製造する点に特徴がある。
FIG. 1 shows an embodiment of the present invention. In this embodiment, an X-shaped bar is formed by an inner rebar 2 having both ends fixed inside a pair of ring plates 1, 1 and an outer rebar 3 having both ends fixed outside the ring plates 1, 1. , Further, the reinforcing bars 4, the parallel main bars 5, and the parallel bars 5 of the parallel main bars 5
It is characterized in that the X-shaped assembled rebar A for a column in which is reinforced is manufactured by a method including the following steps.

【0007】鉄筋の切断工程 直線状の鉄筋を所定長さに切断する。 鉄筋曲げ加工の工程 先の工程で得た鉄筋を、その両端側が互いに平行で中間
部が両端部に対して所定角度で傾斜した斜め筋となる状
態に折り曲げ加工し、必要本数の内側鉄筋2および外側
鉄筋3を製作しておく。
Reinforcing Bar Cutting Step A linear reinforcing bar is cut into a predetermined length. Reinforcing bar bending process The reinforcing bar obtained in the previous process is bent into a state in which both ends are parallel to each other and the middle part is an oblique bar inclined at a predetermined angle with respect to both ends, and the required number of inner reinforcing bars 2 and The outer rebar 3 is manufactured.

【0008】内側鉄筋仮固定の工程 回転軸芯Pを同じくし且つ回転軸芯方向Pへ相対移動可
能に構成された一対の回転体(図示せず)に夫々筒状の
補助リング7,7を支持させ、当該補助リング7,7に
対して内側鉄筋2を供給し、その両端側を補助リング
7,7の外側に仮固定する。そして、内側鉄筋2を1本
仮固定するたびに、前記回転体を介して、補助リング
7,7を同一方向に所定角度ずつ回転させる。補助リン
グ7,7の材質は、鋼板製でもよく、合成樹脂製でもよ
い。仮固定の手段は、点溶接、接着剤による接着等、補
助リング7,7の材質に応じて適宜選択できる。
Step of temporarily fixing inner rebars: Cylindrical auxiliary rings 7 and 7 are respectively provided on a pair of rotating bodies (not shown) having the same rotating shaft core P and being relatively movable in the rotating shaft core direction P. The inner reinforcing bars 2 are supported and supplied to the auxiliary rings 7 and 7, and both ends thereof are temporarily fixed to the outside of the auxiliary rings 7 and 7. Then, each time one inner reinforcing bar 2 is temporarily fixed, the auxiliary rings 7, 7 are rotated by a predetermined angle in the same direction via the rotating body. The material of the auxiliary rings 7, 7 may be made of steel plate or synthetic resin. The means for temporary fixing can be appropriately selected according to the material of the auxiliary rings 7, 7 such as spot welding or adhesion with an adhesive.

【0009】リングプレートの巻き付け工程 補助リング7,7の外側に仮固定した内側鉄筋2群の外
側にリングプレート1,1を套嵌する。リングプレート
1,1は、予め、リング状に形成された鋼板を用いても
よいが、内径を拡大又は縮小できるように周方向の一部
が切れた形状(略C字状)の鋼板を使用し、弾性復元力
に抗して拡径変形させた状態で内側鉄筋2群の外側に套
嵌させるか、あるいは、フラットな帯状鋼板を内側鉄筋
2群の外側に巻き付けてリング状に塑性変形させるよう
にすることが、套嵌作業を容易にする上で望ましい。
Ring Plate Winding Step The ring plates 1, 1 are fitted on the outer side of the inner reinforcing bar 2 group temporarily fixed on the outer sides of the auxiliary rings 7, 7. The ring plates 1 and 1 may be steel plates formed in a ring shape in advance, but steel plates partially cut in the circumferential direction (substantially C-shaped) are used so that the inner diameter can be enlarged or reduced. Then, it is fitted onto the outside of the inner rebar 2 group in a state of being expanded and deformed against the elastic restoring force, or a flat strip-shaped steel plate is wrapped around the outer side of the inner rebar 2 and plastically deformed into a ring shape. This is desirable for facilitating the fitting operation.

【0010】内側鉄筋の溶接工程 手溶接あるいは溶接ロボットにより、内側鉄筋2とリン
グプレート1,1の当接部を溶接する。 外側鉄筋の溶接工程 前記リングプレート1,1に対して外側鉄筋3を供給
し、その両端側をリングプレート1,1の外側に手溶接
あるいは溶接ロボットにより溶接する。リングプレート
1,1は、補助リング7,7に内側鉄筋2を仮固定する
場合と同じように、外側鉄筋3を1本溶接するたびに、
前記回転体を介して同一方向に所定角度ずつ回転させ
る。
Welding process for inner reinforcing bars The inner reinforcing bars 2 and the contact portions of the ring plates 1, 1 are welded by manual welding or a welding robot. Step of Welding Outer Reinforcing Bars Outer reinforcing bars 3 are supplied to the ring plates 1, 1 and both ends thereof are welded to the outside of the ring plates 1, 1 by manual welding or by a welding robot. The ring plates 1 and 1 are welded each time one outer reinforcing bar 3 is welded, as in the case where the inner reinforcing bar 2 is temporarily fixed to the auxiliary rings 7 and 7.
The rotating body is rotated through a predetermined angle in the same direction.

【0011】帯鉄筋巻き上げの工程 外側鉄筋3群の周囲に帯鉄筋4をスパイラル状に巻き付
け、固定する。固定方法としては、図示の工程のように
溶接による固定の他、番線による結束固定、鉄筋3と帯
鉄筋4の摩擦による固定等がある。 平行主筋溶接工程 リングプレート1,1の外側に平行主筋5を溶接する。 帯鉄筋巻き付け溶接の工程 平行主筋5群の周囲に帯鉄筋6をスパイラル状に巻き付
け、溶接により固定する。しかる後、前記回転体を互い
に遠ざかる方向に移動させてX形組立鉄筋を当該回転体
から外し、補助リング7,7を取り去って、所望のX形
組立鉄筋Aを得るのである。
Step of winding up the reinforcing bar 4. The reinforcing bar 4 is spirally wound around and fixed to the outer reinforcing bar 3 group. As a fixing method, there are fixing by welding as in the illustrated process, binding fixing by a wire, fixing by friction between the reinforcing bars 3 and the band reinforcing bars 4, and the like. Parallel main bar welding step The parallel main bar 5 is welded to the outside of the ring plates 1 and 1. The process of winding and wrapping the reinforcing steel bar around the group of 5 parallel main bars, the reinforcing steel bar 6 is spirally wound and fixed by welding. After that, the rotating bodies are moved away from each other to remove the X-shaped assembled reinforcing bar from the rotating body, and the auxiliary rings 7 and 7 are removed to obtain a desired X-shaped assembled reinforcing bar A.

【0012】図2、図3は本発明の他の実施例を示す。
この実施例は、補助リング7,7としてリング状に加工
した鉄筋を使用している点に特徴がある。即ち、先ず、
図2の(イ)および図3に示すように、回転軸芯Pを同
じくし且つ回転軸芯方向Pへ相対移動可能に構成された
一対の回転体8に夫々鉄筋製の補助リング7,7を支持
させる。具体的には、各回転体8には伸縮可能な放射状
のアーム8aを設けておき、当該アーム8aを伸長させ
て、それらの先端で補助リング7,7を支持するのであ
る。
2 and 3 show another embodiment of the present invention.
This embodiment is characterized in that a ring-shaped reinforcing bar is used as the auxiliary rings 7, 7. That is, first,
As shown in (a) of FIG. 2 and FIG. 3, the auxiliary rings 7 and 7 made of rebar are respectively provided to the pair of rotating bodies 8 which have the same rotation axis P and are relatively movable in the rotation axis direction P. Support. Specifically, each rotating body 8 is provided with an expandable and contractible radial arm 8a, and the arm 8a is extended to support the auxiliary rings 7, 7 at their tips.

【0013】この状態で、図2の(ロ)および図3に示
すように、予め所定形状に曲げ加工された内側鉄筋2を
補助リング7,7に対して供給し、当該補助リング7,
7の外側に内側鉄筋2の両端側を点溶接又は接着等の手
段により仮固定する。内側鉄筋2を1本仮固定するたび
に、前記回転体8を介して、補助リング7,7を同一方
向に所定角度ずつ回転させることは、先の実施例と同じ
である。
In this state, as shown in FIG. 2B and FIG. 3, the inner reinforcing bar 2 bent in advance into a predetermined shape is supplied to the auxiliary rings 7, 7 and the auxiliary rings 7,
Both ends of the inner reinforcing bar 2 are temporarily fixed to the outer side of 7 by means such as spot welding or adhesion. It is the same as in the previous embodiment that the auxiliary rings 7, 7 are rotated in the same direction by a predetermined angle via the rotating body 8 every time one inner reinforcing bar 2 is temporarily fixed.

【0014】しかる後、図2の(ハ)および図3に示す
ように、補助リング7,7の外側に仮固定した内側鉄筋
2群の外側にリングプレート1,1を套嵌し、それらの
当接部を手溶接あるいは溶接ロボットにより溶接して固
定する。リングプレート1,1として、内径を拡大又は
縮小できるように周方向の一部が切れた形状(略C字
状)の鋼板を使用し、弾性復元力に抗して拡径変形させ
た状態で内側鉄筋2群の外側に套嵌させるか、あるい
は、フラットな帯状鋼板を内側鉄筋2群の外側に巻き付
けてリング状に塑性変形させるようにすることが、套嵌
作業を容易にする上で望ましいことは、先の実施例と同
じである。
Thereafter, as shown in (c) of FIG. 2 and FIG. 3, ring plates 1, 1 are fitted onto the outer side of the inner reinforcing bar 2 group temporarily fixed on the outer sides of the auxiliary rings 7, 7, and these are fitted. Fix the abutting part by manual welding or by welding with a welding robot. As the ring plates 1 and 1, steel plates having a shape in which a part in the circumferential direction is cut so that the inner diameter can be expanded or contracted (substantially C-shaped) are used, and are expanded and deformed against the elastic restoring force. In order to facilitate the fitting operation, it is preferable to fit the inside of the inner reinforcing bar 2 outside or to wrap a flat strip-shaped steel plate to the outside of the inside reinforcing bar 2 for plastic deformation. This is the same as the previous embodiment.

【0015】次に、図2の(ニ)および図3に示すよう
に、前記リングプレート1,1に対して予め所定形状に
曲げ加工された外側鉄筋3を供給し、その両端側をリン
グプレート1,1の外側に手溶接あるいは溶接ロボット
により溶接する。外側鉄筋3を1本溶接するたびに、リ
ングプレート1,1を同一方向に所定角度ずつ回転させ
ることは、先の実施例と同じである。
Next, as shown in (d) of FIG. 2 and FIG. 3, the outer rebars 3 preliminarily bent into a predetermined shape are supplied to the ring plates 1 and 1, and both end sides thereof are ring plates. Weld to the outside of 1, 1 by hand welding or by a welding robot. The ring plates 1 and 1 are rotated by a predetermined angle in the same direction every time one outer reinforcing bar 3 is welded, as in the previous embodiment.

【0016】しかる後、図2の(ニ)に仮想線で示すよ
うに、アーム8aを縮小すると共に、回転体8,8を互
いに遠ざかる方向に移動させて、X形組立鉄筋を当該回
転体から外し、補助リング7,7を取り去って、図3に
示すようなX形組立鉄筋Bを得るのである。
Thereafter, as shown by the phantom line in FIG. 2D, the arm 8a is contracted, and the rotating bodies 8 and 8 are moved away from each other so that the X-shaped assembly rebar is separated from the rotating body. Then, the auxiliary rings 7 and 7 are removed and the X-shaped rebar B as shown in FIG. 3 is obtained.

【0017】この実施例によれば、内側鉄筋2を仮固定
するための補助リング7,7を鉄筋製としたので、当該
補助リング7,7を柱等のコンクリートに埋め込んでし
まっても、コンクリートの充填不良や補助リング7,7
内外でのコンクリートの分離が生ぜず、また補助リング
7,7は内側鉄筋2を仮固定するための部材であり、構
造体の耐力とは元々無関係であるため、仮固定の強度が
弱くても何ら問題にならない。従って、X形組立鉄筋B
の製造後、補助リング7,7を取り外す必要がなくな
り、これによって製造能率を向上し得るのである。
According to this embodiment, since the auxiliary rings 7 and 7 for temporarily fixing the inner reinforcing bar 2 are made of rebar, even if the auxiliary rings 7 and 7 are embedded in concrete such as columns, concrete Poor filling and auxiliary rings 7,7
Concrete separation does not occur inside and outside, and the auxiliary rings 7 and 7 are members for temporarily fixing the inner reinforcing bar 2, and since they are originally unrelated to the proof stress of the structure, even if the temporary fixing strength is weak. It doesn't matter at all. Therefore, X-shaped assembly rebar B
After the manufacturing, the auxiliary rings 7 and 7 do not need to be removed, which can improve the manufacturing efficiency.

【0018】[0018]

【発明の効果】本発明によれば、補助リングの外側に内
側鉄筋を仮固定し、その外側にリングプレートを套嵌し
て固定し、リングプレートの外側に外側鉄筋を固定する
といったように、常に外側からの作業となり、一対のリ
ングプレートの内側に内側鉄筋の両端側を挿入するとい
う面倒な工程がないので、X形組立鉄筋を容易に製造す
ることができ、製造の自動化を図る上で非常に有効であ
る。
According to the present invention, the inner reinforcing bar is temporarily fixed to the outer side of the auxiliary ring, the ring plate is fitted and fixed to the outer side of the auxiliary ring, and the outer reinforcing bar is fixed to the outer side of the ring plate. Since the work is always performed from the outside and there is no troublesome process of inserting both end sides of the inner reinforcing bar inside the pair of ring plates, the X-shaped assembly reinforcing bar can be easily manufactured, and the manufacturing is automated. It is very effective.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例を示すX形組立鉄筋の製造方
法の説明図である。
FIG. 1 is an explanatory diagram of a method for manufacturing an X-shaped assembled rebar showing an embodiment of the present invention.

【図2】本発明の他の実施例を示すX形組立鉄筋の製造
方法の説明図である。
FIG. 2 is an explanatory view of a method of manufacturing an X-shaped assembled rebar showing another embodiment of the present invention.

【図3】要部の斜視図である。FIG. 3 is a perspective view of a main part.

【符号の説明】[Explanation of symbols]

1…リングプレート、2…内側鉄筋、3…外側鉄筋、7
…補助リング、8…回転体。
1 ... Ring plate, 2 ... Inner rebar, 3 ... Outer rebar, 7
… Auxiliary ring, 8… Rotating body.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 一対のリングプレートの内側に両端側を
固定した内側鉄筋と前記リングプレートの外側に両端側
を固定した外側鉄筋とでX形配筋を構成したX形組立鉄
筋を製造するにあたり、回転軸芯を同じくし且つ回転軸
芯方向へ相対移動可能に構成された一対の回転体に夫々
補助リングを支持させ、前記補助リングの外側に内側鉄
筋の両端側を仮固定し、しかる後、内側鉄筋群の外側に
リングプレートを固定し、当該リングプレートの外側に
外側鉄筋の両端側を固定することを特徴とするX形組立
鉄筋の製造方法。
1. When manufacturing an X-shaped assembly rebar having an X-shaped rebar composed of an inner rebar having both ends fixed to the inside of a pair of ring plates and an outer rebar having both ends fixed to the outside of the ring plate. , A pair of rotating bodies having the same rotating shaft core and configured to be relatively movable in the rotating shaft core direction respectively support the auxiliary rings, and temporarily fix both end sides of the inner reinforcing bar to the outside of the auxiliary rings. A method for manufacturing an X-shaped assembled reinforcing bar, comprising fixing a ring plate to the outside of the inner reinforcing bar group, and fixing both ends of the outer reinforcing bar to the outside of the ring plate.
JP4032555A 1992-01-22 1992-01-22 Manufacturing method of X-shaped assembled rebar Expired - Fee Related JP2779790B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4032555A JP2779790B2 (en) 1992-01-22 1992-01-22 Manufacturing method of X-shaped assembled rebar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4032555A JP2779790B2 (en) 1992-01-22 1992-01-22 Manufacturing method of X-shaped assembled rebar

Publications (2)

Publication Number Publication Date
JPH05295855A true JPH05295855A (en) 1993-11-09
JP2779790B2 JP2779790B2 (en) 1998-07-23

Family

ID=12362168

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4032555A Expired - Fee Related JP2779790B2 (en) 1992-01-22 1992-01-22 Manufacturing method of X-shaped assembled rebar

Country Status (1)

Country Link
JP (1) JP2779790B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01215422A (en) * 1988-02-22 1989-08-29 Haseko Corp Manufacture of multi-directional x-type erection bar

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01215422A (en) * 1988-02-22 1989-08-29 Haseko Corp Manufacture of multi-directional x-type erection bar

Also Published As

Publication number Publication date
JP2779790B2 (en) 1998-07-23

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