JP3444702B2 - Metal tube with reinforcement and method of manufacturing the same - Google Patents
Metal tube with reinforcement and method of manufacturing the sameInfo
- Publication number
- JP3444702B2 JP3444702B2 JP22966695A JP22966695A JP3444702B2 JP 3444702 B2 JP3444702 B2 JP 3444702B2 JP 22966695 A JP22966695 A JP 22966695A JP 22966695 A JP22966695 A JP 22966695A JP 3444702 B2 JP3444702 B2 JP 3444702B2
- Authority
- JP
- Japan
- Prior art keywords
- metal pipe
- reinforcing
- main body
- pipe
- thickness
- 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 - Fee Related
Links
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- Rod-Shaped Construction Members (AREA)
- Forging (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、建築物における柱
材として用いるのに好適な補強部付金属管及びその製造
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal pipe with a reinforcing portion suitable for use as a pillar material in a building and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】従来より、角形鋼管、丸形鋼管等の金属
管が建築物の柱材として広く使用されている。このよう
な金属管を柱材として用い、その柱材に梁材をボトル接
合、溶接接合等によって接合する場合、その柱材の梁接
合部に、強度確保のために各種の補強部材を設けてい
る。例えば、柱材が角形鋼管であって、梁材がＨ形鋼か
らなる場合は、角形鋼管の内部で且つ梁材であるＨ形鋼
の上下フランジの高さ位置に補強用のダイヤフラムを設
けたり、角形鋼管の内面或いは外面に補強板を取り付け
る構造が一般に採られる。2. Description of the Related Art Conventionally, metal pipes such as square steel pipes and round steel pipes have been widely used as column materials for buildings. When such a metal pipe is used as a pillar material and the beam material is joined to the pillar material by bottle joining, welding joining, or the like, various reinforcing members are provided at the beam joining portion of the pillar material in order to secure strength. There is. For example, when the pillar is a square steel pipe and the beam is made of H-section steel, a reinforcing diaphragm is provided inside the square steel pipe and at the height position of the upper and lower flanges of the H-section steel that is the beam. Generally, a structure in which a reinforcing plate is attached to the inner surface or the outer surface of a rectangular steel pipe is adopted.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、金属管
に対して補強部材を設けることは面倒な作業を必要と
し、コストアップの原因となっていた。また、補強部材
として管内にダイヤフラムを設ける場合或いは補強板を
設ける場合には、管の中間位置に取り付けることが困難
であり、そのため、通し柱とする場合は、各階毎に区切
られた高さの柱とし、ダイヤフラム或いは補強板を取り
付けた後、上下の柱を相互に接合する必要があり、作業
性が悪いという問題もあった。However, providing the reinforcing member to the metal pipe requires a troublesome work, which causes a cost increase. Also, when a diaphragm is provided in the pipe as a reinforcing member or a reinforcing plate is provided, it is difficult to install it in the middle position of the pipe. Therefore, when it is used as a through column, columns of heights separated for each floor are used. However, it is necessary to join the upper and lower pillars to each other after attaching the diaphragm or the reinforcing plate, which causes a problem of poor workability.
【０００４】本発明は、かかる問題点に鑑みて為された
もので、金属管の長手方向の少なくとも一部の領域にあ
らかじめ補強部を形成しておき、その位置を梁接合部と
することで、従来用いていた補強部材を不要とし、簡単
な作業によって梁材を強固に接合可能な、また、通し柱
としても使用可能な、補強部付金属管を提供することを
目的とする。また、本発明はその補強部付金属管を製造
する方法を提供することも目的とする。The present invention has been made in view of the above problems, and a reinforcing portion is formed in advance in at least a partial region of the metal pipe in the longitudinal direction, and the position is defined as a beam joint portion. An object of the present invention is to provide a metal pipe with a reinforcing portion, which does not require a reinforcing member that has been conventionally used, can firmly join beam members by a simple work, and can also be used as a through column. Moreover, this invention also makes it the objective to provide the method of manufacturing the metal pipe with the reinforcement part.
【０００５】[0005]
【課題を解決するための手段】本発明の補強部付金属管
は、本体金属管の長手方向の少なくとも１個所に、管軸
方向の圧縮力を加えて増肉させて厚肉部を形成し且つそ
の厚肉部の外側又は内側に補強用金属管を密着嵌合させ
て補強部としたことを特徴とし、更に、その補強用金属
管を前記厚肉部の形成工程における前記本体金属管の増
肉によって前記厚肉部に密着嵌合させたことを特徴とす
るものである。 According to the present invention, there is provided a metal pipe with a reinforcing portion, wherein at least one portion in the longitudinal direction of the main body metal pipe has a pipe shaft.
Characterized in that the direction of the compressive force is thickened by forming a thick portion and the thickness reinforcing portion outer or inner contact-fitted to metal reinforcement tube meat portion, further, its Reinforcing metal
In the process of forming the thick wall portion, the pipe is added to the main body metal pipe.
It is characterized in that it is closely fitted to the thick portion by meat.
It is something.
【０００６】この補強部は、本体金属管自体の厚肉部の
みならずそれに密着嵌合した補強用金属管を有している
ので、補強用金属管の肉厚の選定により、全体としての
肉厚を所望の強度が得られるように設定することが容易
である。このため、この補強部は梁材の接合に好適であ
り、従って、この補強部付金属管は建築物の柱材として
好適である。すなわち、この補強部付金属管を建築物の
柱材として使用すると、その補強部に直接、梁材を溶接
或いはボルト止め等によって接合することで、強固な
柱、梁接合構造を形成でき、柱材に対する梁材の接合作
業をきわめて簡略化することが可能となる。また、補強
部は本体金属管の任意の位置に形成可能であるので、本
体金属管を複数階にわたる通し柱として使用可能な長さ
とし、各階の梁取付位置に対応する位置に補強部を形成
しておくことで、この補強部付金属管を通し柱として使
用することもできる。更に、製造に当たっては、厚肉部
の形成と補強用金属管の密着嵌合を同時に行うので、工
程が簡単であり、しかも、増肉によって密着嵌合させる
ため、増肉量の選定により確実に密着嵌合させることが
できる。 Since the reinforcing portion has not only the thick-walled portion of the main body metal tube itself but also the reinforcing metal tube tightly fitted thereto, the wall thickness of the reinforcing metal tube is selected as a whole. It is easy to set the thickness to obtain the desired strength. Therefore, this reinforcing portion is suitable for joining beam members, and therefore, the metal pipe with the reinforcing portion is suitable as a pillar material of a building. That is, when this metal pipe with a reinforcing portion is used as a pillar material for a building, a strong pillar or beam joint structure can be formed by directly joining the reinforcing material to the reinforcing material by welding or bolting. It is possible to greatly simplify the work of joining the beam material to the material. Further, since the reinforcing portion can be formed at any position of the main body metal pipe, the main body metal pipe has a length that can be used as a through column extending over a plurality of floors, and the reinforcing portion is formed at a position corresponding to the beam mounting position on each floor. By placing it, this metal pipe with a reinforcing portion can be used as a through column. Furthermore, in manufacturing, the thick part
Since the formation of the pipe and the close fitting of the reinforcing metal pipe are performed at the same time,
It is as simple as that, and moreover, it is closely fitted by increasing the thickness.
Therefore, it is possible to ensure close fitting by selecting the amount of thickening.
it can.
【０００７】本発明で使用する本体金属管としては、主
として角形鋼管、丸形鋼管等、建築物の柱材として使用
可能な金属管を挙げることができるが、その他の材質の
ものを使用する事も可能である。補強用金属管は本体金
属管にほぼ相似な断面形状のもので、材質は、通常本体
金属管と同系統のものが使用される。その本体金属管に
形成する補強部の位置及び長さは、金属管の用途に応じ
て適宜定めるもので、例えば、この金属管を建築物の柱
材として使用する時には、梁材を接合すべき位置に補強
部が位置するように位置を設定し、また、その長さとし
ては、梁材を接合可能な長さで且つ極力短い長さに、例
えば、梁材を接合した領域の上下に若干の余裕（１０〜
１５０ｍｍ程度）が形成されるような長さに設定すれば
よい。更に具体的には、Ｈ型鋼等の梁材の高さ方向の寸
法（梁成）は一般に、３００〜９００ｍｍ程度であるの
で、補強部の長さは、３２０〜１２００ｍｍ程度とすれ
ばよい。As the main body metal pipe used in the present invention, a metal pipe that can be mainly used as a pillar material of a building such as a square steel pipe, a round steel pipe, etc. can be mentioned, but use of other materials. Is also possible. The reinforcing metal pipe has a cross-sectional shape that is substantially similar to the main body metal pipe, and the material is usually the same type as the main body metal pipe. The position and length of the reinforcing portion formed on the main body metal pipe are appropriately determined according to the application of the metal pipe.For example, when using this metal pipe as a pillar material for a building, beam members should be joined. The position is set so that the reinforcing portion is located at the position, and the length is set to a length that allows the beam members to be joined and is as short as possible, for example, slightly above and below the region where the beam members are joined. Margin (10
The length may be set so that (about 150 mm) is formed. More specifically, since the dimension of the beam material such as H-section steel in the height direction (beam formation) is generally about 300 to 900 mm, the length of the reinforcing portion may be about 320 to 1200 mm.
【０００８】補強部を構成する厚肉部及び補強用金属管
の厚さは、全体として必要な強度、厚さを得ることがで
きるように定めればよく、具体的には、補強部の全体と
しての厚さｔを、本体金属管の増肉していない部分の厚
さ即ち本来厚さｔ0 の１．５〜６倍程度に選定すること
が好ましい。この補強部の厚さｔが１．５倍よりも小さ
いと補強効果が小さくて、例えば梁材接合に使用する場
合に強度不足を生じがちである。一方、６倍を越えると
強度は増すものの、補強部以外の部分の強度に比べて大
きくなりすぎ、それ以上の強度補強を行う意味がなく、
しかも製造コストは余分にかかるため好ましくない。こ
のため、補強部の厚さｔは上記した範囲内に設定するこ
とが好ましい。更には、補強部の厚さｔを、２〜４倍程
度とすることが、適度な強度を確保でき且つ入手しやす
い寸法の金属管を補強用金属管として使用できるので、
一層好ましい。補強部を構成する厚肉部の厚さｔ1 及び
補強用金属管の厚さｔ2 は、全体が所望の厚さとなるよ
うに適当に定めればよいが、厚肉部の厚さｔ1 を本体金
属管の本来厚さｔ0 よりもあまり大きくすると増肉加工
が困難となるので好ましくない。従って厚肉部の厚さｔ
1 を、増肉加工を容易に行い得るよう本来厚さｔ0 の
１．１〜１．６倍程度に、更に好ましくは１．１〜１．
３倍程度に設定し、補強部に必要な厚さは、補強用金属
管の厚さｔ2 を大きく設定することで確保する構成とす
ることが好ましい。The thickness of the thick-walled portion and the reinforcing metal tube forming the reinforcing portion may be determined so that the required strength and thickness can be obtained as a whole. It is preferable that the thickness t is selected to be about 1.5 to 6 times the thickness of the non-thickened portion of the main body metal tube, that is, the original thickness t 0 . If the thickness t of the reinforcing portion is smaller than 1.5 times, the reinforcing effect is small, and the strength tends to be insufficient when used for beam joining, for example. On the other hand, if it exceeds 6 times, the strength will increase, but it will be too large compared to the strength of the portion other than the reinforcing portion, and there is no point in reinforcing the strength further.
Moreover, it is not preferable because the manufacturing cost is extra. Therefore, the thickness t of the reinforcing portion is preferably set within the above range. Furthermore, since the thickness t of the reinforcing portion is set to about 2 to 4 times, a metal pipe having a size that can secure appropriate strength and is easily available can be used as the reinforcing metal pipe.
More preferable. The thickness t 2 of the thickness t 1 and the metal reinforcement tube thick portion constituting the reinforcing portion, the entire but may be determined appropriately so as to have a desired thickness, the thick portion thickness t 1 Is too large than the original thickness t 0 of the main body metal tube, it is difficult to increase the thickness, which is not preferable. Therefore, the thickness t of the thick portion
1 is about 1.1 to 1.6 times the original thickness t 0 , more preferably 1.1 to 1.
It is preferable that the thickness is set to about 3 times, and the thickness required for the reinforcing portion is secured by setting the thickness t 2 of the reinforcing metal tube large.
【０００９】また、本発明は上記した補強部付金属管の
製造方法も提供する。すなわち、本発明の製造方法は、
本体金属管の長手方向の補強すべき個所の外側又は内側
に、前記本体金属管の本来外径よりも大きな内径を有す
る補強用金属管又は本体金属管の本来内径よりも小さな
外径を有する補強用金属管を同心状に配置し、次いで、
前記本体金属管の、少なくとも補強用金属管に対向する
個所を赤熱下で管軸方向に圧縮して増肉させ、前記補強
用金属管に密着嵌合させることを特徴とするものであ
る。The present invention also provides a method for manufacturing the above-mentioned metal pipe with a reinforcing portion. That is, the manufacturing method of the present invention,
Outside or inside the portion of the main body metal pipe to be reinforced in the longitudinal direction, a reinforcing metal pipe having an inner diameter larger than the original outer diameter of the main body metal pipe or a reinforcement having an outer diameter smaller than the original inner diameter of the main body metal pipe. The metal tubes for concentric arrangement, and then
It is characterized in that at least a portion of the main body metal pipe facing the reinforcing metal pipe is compressed under red heat in the axial direction of the pipe to increase the wall thickness, and is closely fitted to the reinforcing metal pipe.
【００１０】ここで、本体金属管を増肉させる方法とし
ては、厚肉部を形成する領域全体を赤熱状態とし、全体
に同時に増肉を生じさせる方法、厚肉部を形成する領域
の一部を狭幅環状に赤熱して増肉させ、次いで、隣接し
た領域を狭幅環状に赤熱して増肉させるという動作を繰
り返し、順次増肉を行ってゆく方法、或いは、厚肉部を
形成する領域の一部を狭幅環状に赤熱して増肉させると
共にその赤熱位置を管軸方向に連続的に移動させ且つそ
の後端部分を冷却することで、連続的に増肉させてゆく
方法を挙げることができる。このうち、最後に述べた連
続的に増肉させてゆく方法が、安定して均一な増肉を行
うことができるので、好ましい。Here, as a method for increasing the thickness of the main body metal tube, the entire region where the thick portion is formed is brought into a red hot state, and the entire thickness is simultaneously increased, and a part of the region where the thick portion is formed. To increase the thickness by red-hot heating in a narrow annular shape, and then red-heat the adjacent area in a narrow annular shape to increase the thickness, or to sequentially increase the thickness, or to form a thick portion. A method of continuously increasing the thickness by red-heating a part of the region in a narrow annular shape to increase the thickness and continuously moving the red-hot position in the tube axis direction and cooling the rear end portion is given. be able to. Of these, the last-mentioned method of continuously increasing the thickness is preferable because it is possible to stably and uniformly increase the thickness.
【００１１】上記した方法の実施に当たって、前記本体
金属管とそれに同心状に配置した補強用金属管との間隙
及び本体金属管の増肉量は、当然、本体金属管に対する
増肉操作によって本体金属管の増肉した部分が補強用金
属管に密着嵌合するように定められるものである。とこ
ろで、本体金属管に管軸方向の圧縮力を加えて増肉させ
る場合、本体金属管の内外面を拘束しない状態とする
と、内面側、外面側にほぼ等しい増肉が生じる。従っ
て、本体金属管と補強用金属管の間隙ｇが、本体金属管
に生じさせる増肉量（＝ｔ1 −ｔ0 ）の１／２より小さ
く、すなわち、
ｇ＜（ｔ1 −ｔ0 ）／２
となるように間隙ｇ及び増肉量を設定すればよい。ここ
で、本体金属管と補強用金属管の間隙ｇを、本体金属管
に生じさせる増肉量の１／２よりわずかに小さい値に設
定すると、内外面にほぼ等しい増肉を生じた形状の厚肉
部の片側に補強用金属管が密着嵌合した補強部が形成さ
れる。また、その間隙ｇを、本体金属管に生じさせる増
肉量の１／２よりかなり小さい値に設定すると、増肉加
工時に補強用金属管を配置した側への増肉が抑制され、
その分反対側の増肉量が増大し、結局、内外面で増肉量
が異なる厚肉部の、増肉の少ない側に補強用金属管が密
着嵌合した補強部が形成される。本体金属管と補強用金
属管の間隙ｇの最小値としては、本体金属管に対して補
強用金属管の装着を容易に行うことができるように定め
るものであり、例えば、内径が３００ｍｍ程度の丸形鋼
管の内側に補強用金属管を挿入する場合、両者の間隙は
０．５ｍｍ程度以上とすることが好ましい。なお、本体
金属管の増肉加工に際し、補強用金属管を装着した側と
は反対側への増肉量を型によって拘束しながら増肉加工
を行うことも可能であり、この場合には、型によって片
側への増肉量が拘束される結果、補強用金属管を配置し
た側への増肉量が多くなり、従って、本体金属管と補強
用金属管の間隙ｇを、本体金属管に生じさせる増肉量の
１／２よりも大きく設定することが可能となる。In carrying out the above method, the gap between the main body metal pipe and the reinforcing metal pipe arranged concentrically with the main body metal pipe and the amount of increase in the thickness of the main body metal pipe are, of course, determined by increasing the thickness of the main body metal pipe. It is determined that the thickened portion of the pipe is closely fitted to the reinforcing metal pipe. By the way, in the case of applying a compressive force in the axial direction of the main body metal tube to increase the thickness, if the inner and outer surfaces of the main body metal tube are not restrained, the inner surface side and the outer surface side have substantially the same thickness increase. Therefore, the gap g between the main body metal pipe and the reinforcing metal pipe is smaller than 1/2 of the amount of thickness increase (= t 1 −t 0 ) generated in the main body metal pipe, that is, g <(t 1 −t 0 ). It suffices to set the gap g and the amount of increase in thickness to be / 2. Here, when the gap g between the main body metal pipe and the reinforcing metal pipe is set to a value slightly smaller than 1/2 of the amount of thickness increase to be generated in the main body metal pipe, it is possible to obtain a shape in which the inner and outer surfaces have substantially the same thickness increase. A reinforcing portion is formed on one side of the thick portion, in which a reinforcing metal tube is closely fitted. Further, when the gap g is set to a value much smaller than 1/2 of the amount of thickness increase to be generated in the main body metal pipe, the thickness increase to the side where the reinforcing metal pipe is arranged during the thickness increase processing is suppressed,
The amount of increase in thickness on the opposite side increases by that amount, and as a result, a reinforcing portion in which the reinforcing metal pipe is closely fitted is formed on the side of the thicker portion having different amounts of increase in thickness on the inner and outer surfaces, which side has less increase in thickness. The minimum value of the gap g between the main body metal pipe and the reinforcing metal pipe is determined so that the reinforcing metal pipe can be easily attached to the main body metal pipe. For example, the inner diameter is about 300 mm. When the reinforcing metal pipe is inserted inside the round steel pipe, the gap between them is preferably about 0.5 mm or more. In addition, when increasing the thickness of the main body metal pipe, it is also possible to perform the thickness increase process while restraining the amount of increase in thickness to the side opposite to the side on which the reinforcing metal pipe is mounted by the mold. As a result of the amount of thickening on one side being restricted by the mold, the amount of thickening on the side where the reinforcing metal pipe is arranged increases, and therefore the gap g between the main body metal pipe and the reinforcing metal pipe is It is possible to set it to be larger than 1/2 of the amount of thickness increase to be generated.
【００１２】上記した本発明方法では、本体金属管に対
して補強用金属管をセットした状態で本体金属管に増肉
を生じさせることにより、増肉した部分を補強用金属管
に強固に圧接させることができ、本体金属管に形成され
た厚肉部に補強用金属管が強固に密着嵌合した補強部を
形成することができる。また、本体金属管に増肉を生じ
させる際、補強用金属管は増肉が生じる部分に対して型
の役割を果たし、このため、増肉を生じる部分がたわむ
とか、蛇腹状の変形を生じるということが防止され、良
好な形状の厚肉部を形成できる。In the above-described method of the present invention, by increasing the thickness of the main body metal pipe in a state where the reinforcement metal pipe is set to the main body metal pipe, the thickened portion is firmly pressed against the reinforcement metal pipe. It is possible to form the reinforcing portion in which the reinforcing metal tube is firmly and closely fitted to the thick portion formed in the main body metal tube. Further, when increasing the thickness of the main body metal pipe, the reinforcing metal pipe plays a role of a mold for the portion where the thickness increase occurs, and therefore the portion where the thickness increase occurs is bent or a bellows-like deformation occurs. This is prevented, and a thick wall portion having a good shape can be formed.
【００１３】[0013]
【発明の実施の形態】図１は本発明の一実施例による補
強部付金属管（以下単に金属管と略称する）の一部を示
す概略縦断面図、図２はその金属管の概略横断面図、図
３はその金属管を建築物の通し柱として使用した状態を
示す概略側面図である。全体を参照符号１で示す金属管
は、角形鋼管からなる本体金属管２の長手方向の複数個
所に補強部３を形成し、建築物の通し柱として使用する
ように構成したものである。この補強部３は、本体金属
管２を増肉させて形成した厚肉部３ａと、その内面に密
着嵌合して設けられた補強用金属管（以下補強管とい
う）３ｂとで構成されている。なお、補強部３の具体的
な形成方法は後述する。1 is a schematic longitudinal sectional view showing a part of a metal pipe with a reinforcing portion (hereinafter simply referred to as a metal pipe) according to an embodiment of the present invention, and FIG. 2 is a schematic cross section of the metal pipe. FIG. 3 is a schematic side view showing a state in which the metal pipe is used as a through column of a building. The metal pipe indicated by reference numeral 1 as a whole is configured such that reinforcing portions 3 are formed at a plurality of positions in a longitudinal direction of a main body metal pipe 2 made of a rectangular steel pipe and used as a through column of a building. The reinforcing portion 3 is composed of a thick portion 3a formed by increasing the thickness of the main body metal pipe 2 and a reinforcing metal pipe (hereinafter referred to as a reinforcing pipe) 3b provided by closely fitting the inner surface thereof. There is. A specific method of forming the reinforcing portion 3 will be described later.
【００１４】補強部３の形成位置は、梁材５を接合する
位置、管端位置等であり、この補強部３は、梁材５を接
合するため、金属管１を建物の基礎６に固定金具７を用
いて固定するため、或いは金属管１の端部同志をつなぎ
合わせるため等に使用される。従って、補強部３の全体
の厚さｔは、梁材接合或いは基礎への固定等に必要な強
度を確保できるような厚さとなるように定められてい
る。具体的には、この補強部３の全体としての厚さｔは
本体金属管２の本来厚さｔ0 に対して、１．５〜６倍程
度に、好ましくは２〜４倍程度に選定されており、ま
た、厚肉部３ａの厚さｔ1 は本体金属管２の本来厚さｔ
0 に対して、好ましくは１．１〜１．６倍程度に、更に
好ましくは１．１〜１．３倍程度に設定されている。The reinforcing portion 3 is formed at a position where the beam member 5 is joined, a pipe end position, and the like. Since the reinforcing member 3 joins the beam member 5, the metal pipe 1 is fixed to the foundation 6 of the building. It is used for fixing with the metal fitting 7, or for connecting the ends of the metal tube 1 to each other. Therefore, the total thickness t of the reinforcing portion 3 is determined to be a thickness that can secure the strength required for joining the beam members or fixing to the foundation. Specifically, the total thickness t of the reinforcing portion 3 is selected to be about 1.5 to 6 times, preferably about 2 to 4 times the original thickness t 0 of the main body metal tube 2. In addition, the thickness t 1 of the thick portion 3a is the original thickness t of the main body metal tube 2.
0 is preferably set to about 1.1 to 1.6 times, and more preferably set to about 1.1 to 1.3 times.
【００１５】梁材取付位置に設ける補強部３の長さＬ
は、梁材５を取り付けるのに必要な長さに設定されてい
る。すなわち、補強部３の長さＬは、それに取り付ける
梁材５の高さ方向の寸法Ｈよりもわずかに大きく、例え
ば、上下にそれぞれ１０〜１５０ｍｍ程度の余裕をとる
ように設定されている。図３に示すように、金属管１の
最下部の補強部３を除いた他の補強部３は、この金属管
１を建築物の通し柱として使用した時に、各階の梁材５
の取付位置に対応する位置に形成されている。The length L of the reinforcing portion 3 provided at the beam member mounting position
Is set to a length required to attach the beam 5. That is, the length L of the reinforcing portion 3 is set to be slightly larger than the dimension H of the beam member 5 attached thereto in the height direction, and for example, it is set to have a margin of about 10 to 150 mm in the vertical direction. As shown in FIG. 3, the reinforcing portions 3 other than the reinforcing portion 3 at the bottom of the metal pipe 1 have beam members 5 on each floor when the metal pipe 1 is used as a through column of a building.
Is formed at a position corresponding to the mounting position of.
【００１６】上記構成の金属管１は図３に示すように、
建築物の複数階に渡る通し柱として使用され、下端の補
強部３が基礎６に固定金具７によって固定され、その他
の補強部３にはそれぞれＨ形鋼からなる梁材５が接合さ
れる。As shown in FIG. 3, the metal tube 1 having the above structure is
It is used as a through pillar extending over a plurality of floors of a building, the reinforcing portion 3 at the lower end is fixed to a foundation 6 by a fixing metal fitting 7, and beam members 5 made of H-shaped steel are joined to the other reinforcing portions 3, respectively.
【００１７】次に、金属管１に対する梁材５の取付構造
を説明する。図４、図５はこの補強部３に対する梁材５
の取付構造の１例を示すものであり、この例では、補強
部３にねじ孔８を形成し、そのねじ孔８を利用してスプ
リットティー１０をボルト１１で固定し、そのスブリッ
トティー１０に梁材５の端部をボルト１２で固定してい
る。なお、補強部３に対する梁材５の取付構造は種々変
更可能であり、例えば、図６に示すように、梁材５の端
部にエンドプレート１４を溶接固定しておき、補強部３
に形成したねじ孔８を利用して、そのエンドプレート１
４をボルト１５によって固定する構成とするとか、図７
に示すように、金属管１の補強部３の外面に予め梁受け
部１６を溶接固定して付設しておき、その梁受け部１６
に梁材５をボルト１７で固定する構成とすることができ
る。また、図８に示すように、梁材５の端部を補強部３
に突き当て、直接溶接により接合することも可能であ
る。勿論、これ以外の取付構造を採用してもよい。Next, the mounting structure of the beam 5 on the metal tube 1 will be described. 4 and 5 show the beam member 5 for the reinforcing portion 3.
In this example, a screw hole 8 is formed in the reinforcing portion 3, the split tee 10 is fixed with a bolt 11 using the screw hole 8, and the split tee 10 is attached. The end portion of the beam member 5 is fixed by the bolt 12. The mounting structure of the beam member 5 to the reinforcing portion 3 can be variously changed. For example, as shown in FIG. 6, the end plate 14 is welded and fixed to the end portion of the beam member 5, and the reinforcing portion 3 is fixed.
Using the screw holes 8 formed in the end plate 1
4 is fixed by bolts 15, or as shown in FIG.
As shown in FIG. 2, the beam receiving portion 16 is attached by welding to the outer surface of the reinforcing portion 3 of the metal tube 1 in advance.
The beam member 5 may be fixed to the bolt 5 with a bolt 17. In addition, as shown in FIG.
It is also possible to butt it against and to join by direct welding. Of course, a mounting structure other than this may be adopted.
【００１８】更に、補強部３に、図５或いは図６に示す
ようにスプリットティー１０或いはエンドプレート１４
をボルト止めするに際し、その補強部３にねじ孔８を形
成し、そのねじ孔８にボルト１１、１５をねじ込む構成
とする代わりに、補強部３に、ボルト１１、１５を通す
ことの可能なばか孔を形成しておき、外側からワンサイ
ドボルトを挿入し、そのワンサイドボルトでスプリット
ティー１０或いはエンドプレート１４を固定することも
可能である。ここで、「ワンサイドボルト」とは、一端
側からの操作で他端に頭部が拡径状態に塑性変形で形成
されて締付が行える軸状締付具の総称であり、ブライン
ドボルトとも呼ばれるものである。Furthermore, as shown in FIG. 5 or 6, the split tee 10 or the end plate 14 is provided on the reinforcing portion 3.
It is possible to pass the bolts 11 and 15 through the reinforcing portion 3 instead of forming the screw holes 8 in the reinforcing portion 3 and screwing the bolts 11 and 15 into the screw holes 8 when bolting It is also possible to form a fool hole, insert a one side bolt from the outside, and fix the split tee 10 or the end plate 14 with the one side bolt. Here, the "one-side bolt" is a general term for a shaft-shaped tightening tool that can be tightened by an operation from one end side so that the head part is plastically deformed into a diameter-expanded state at the other end, and is also a blind bolt. It is called.
【００１９】以上のように、柱である金属管１の梁材５
が接合される領域に、補強部３を形成する構成とする
と、梁材５の接合領域が厚肉に形成され、十分な強度を
備えているため、単にこの補強部３に梁材５を直接接合
することで必要な強度で柱と梁を接合することができ
る。また、図５、図６に示すように、ボルト１１、１５
を使用する場合において、補強部３は全体の肉厚が大き
くなっているので、その領域に直接ねじ孔８を形成し、
必要な強度でボルト１１、１５等を固定することが可能
である。このため、従来のように梁材を取り付ける領域
に、梁材接合に先立って補強部材を取り付けるという作
業が不要となり、従って、梁材接合作業が簡素化され、
また、使用するボルト本数も少なくなり、ボルト締め工
数も削減でき、これらにより工期も短縮できる。しか
も、金属管１は継ぎ目のない通し柱として使用されるの
で、この点からも現場での作業量が少なくなり、コスト
低減が図れる。As described above, the beam member 5 of the metal tube 1 which is a pillar
If the reinforcing portion 3 is formed in the region where the beam member 5 is joined, the beam member 5 is directly attached to the reinforcing member 3 because the joining region of the beam member 5 is formed thick and has sufficient strength. The columns and beams can be joined with the required strength by joining them. Further, as shown in FIGS. 5 and 6, the bolts 11 and 15 are
In the case of using, since the reinforcing portion 3 has a large overall thickness, the screw hole 8 is directly formed in that region,
It is possible to fix the bolts 11, 15 and the like with a required strength. Therefore, it is not necessary to attach a reinforcing member to the area where the beam is attached as in the prior art, prior to the beam joining, and therefore, the beam joining work is simplified.
In addition, the number of bolts used is reduced, and the number of bolt tightening steps can be reduced, thereby shortening the construction period. Moreover, since the metal tube 1 is used as a seamless through column, the amount of work on site is reduced from this point as well, and the cost can be reduced.
【００２０】なお、上記実施例では、金属管１の梁材を
取り付ける領域全体に、一定肉厚の補強部３を形成して
いるが、本発明はこの構成に限らず、必要な部分のみに
補強部を形成する構成とするとか、一つの補強管３ｂに
対して複数個所に厚肉部３ａを密着嵌合させて複数の補
強部とする等の変更を行ってもよい。すなわち、図９に
示すように、スプリットティー１０を用いて梁材５を金
属管１に取り付ける構造において、上下に配置されるス
プリットティー１０の取り付け領域のみに厚肉部３ａ、
３ａを形成し、共通の補強管３ｂに密着嵌合させて補強
部３、３を構成してもよい。In the above embodiment, the reinforcing portion 3 having a constant thickness is formed in the entire region of the metal tube 1 to which the beam member is attached. However, the present invention is not limited to this structure, and only the necessary portion is formed. Modifications may be made such that a reinforcing portion is formed or a plurality of reinforcing portions are formed by tightly fitting the thick portions 3a at a plurality of locations with respect to one reinforcing pipe 3b. That is, as shown in FIG. 9, in the structure in which the beam member 5 is attached to the metal tube 1 using the split tees 10, the thick portions 3a are provided only in the attachment regions of the split tees 10 arranged vertically.
3a may be formed, and the reinforcing portions 3 may be configured by closely fitting the common reinforcing pipe 3b.
【００２１】図３において、金属管１の下端の補強部３
は基礎６に対して固定金具７によって固定されている。
この固定金具７の補強部３への取付構造も、上記した金
属管１に対する梁材５の取付構造と同様であり、従来の
ような補強部材の取り付けを必要とせず、容易に施工で
きる。In FIG. 3, the reinforcing portion 3 at the lower end of the metal tube 1
Are fixed to the base 6 by fixing brackets 7.
The mounting structure of the fixing metal fitting 7 to the reinforcing portion 3 is similar to the mounting structure of the beam member 5 to the metal tube 1 described above, and it is easy to construct without requiring the mounting of the reinforcing member as in the conventional case.
【００２２】以上に説明したように、本実施例の金属管
１は複数階に渡る通し柱として使用することができ、し
かもその際、梁材５の接合作業、基礎６への固定作業を
容易に行うことができるので、工数を削減できるという
効果を有している。なお、本発明の金属管は必ずしも通
し柱として使用する場合に限らず、任意の長さの柱とし
て使用可能であり、且つ補強部３の形成位置、個数も使
用場所に応じて適宜変更可能であることは言うまでもな
い。また、金属管としても角形鋼管に限らず、他の断面
形状としてもよい。As described above, the metal pipe 1 of this embodiment can be used as a through column extending over a plurality of floors, and at the same time, the work of joining the beam 5 and the work of fixing it to the foundation 6 can be facilitated. Since it can be performed, it has an effect of reducing the number of steps. The metal tube of the present invention is not limited to the case where it is used as a through column, but can be used as a column having an arbitrary length, and the forming position and the number of the reinforcing portions 3 can be appropriately changed according to the use place. Needless to say. Further, the metal pipe is not limited to the rectangular steel pipe, and may have another cross-sectional shape.
【００２３】図１０は本発明の他の実施例を示す概略斜
視図、図１１はその概略断面図である。この実施例の金
属管２１は、円形鋼管からなる本体金属管２２の、一部
領域に補強部２３を形成したものであり、この補強部２
３も本体金属管２２に形成された厚肉部２３ａとその内
側に密着嵌合された補強管２３ｂで構成されている。こ
の補強部２３にＨ形鋼からなる梁材２５が接合されてい
る。この実施例では、梁材２５を補強部２３へ取り付け
るために、梁材２５の端部には円弧状に湾曲させたエン
ドプレート２８が予め溶接固定されており、そのエンド
プレート２８を補強部２３に溶接固定することにより、
梁材２５が金属管２１に接合されている。この構成の金
属管２１においても、梁材を接合する領域に補強部２３
を設けて強度を増大させているので、補強部材をあらた
めて取り付ける必要がなく、このため、現場での梁材２
５の接合作業を容易とすることができ、コストダウンを
図ることができる。なお、この金属管２１に対しても、
梁材２５の取付構造は図示した溶接固定に限らず、ボル
ト止めを採用するとか、図７に示す梁受け部１６と同様
な梁受け部を設けておき、その梁受け部に梁材２５をボ
ルト止めする等の変更を行うことが可能である。FIG. 10 is a schematic perspective view showing another embodiment of the present invention, and FIG. 11 is a schematic sectional view thereof. The metal pipe 21 of this embodiment is obtained by forming a reinforcing portion 23 in a partial region of a main body metal pipe 22 made of a circular steel pipe.
The reference numeral 3 also includes a thick portion 23a formed on the main body metal tube 22 and a reinforcing tube 23b closely fitted to the inside thereof. A beam 25 made of H-shaped steel is joined to the reinforcing portion 23. In this embodiment, in order to attach the beam member 25 to the reinforcing portion 23, an end plate 28 curved in an arc shape is welded and fixed to the end portion of the beam member 25 in advance, and the end plate 28 is fixed to the reinforcing portion 23. By welding and fixing to
The beam member 25 is joined to the metal tube 21. Also in the metal pipe 21 having this configuration, the reinforcing portion 23 is provided in the region where the beam members are joined.
Since the reinforcement is provided to increase the strength, it is not necessary to attach the reinforcing member again.
The joining work of No. 5 can be facilitated, and the cost can be reduced. In addition, also for this metal tube 21,
The mounting structure of the beam member 25 is not limited to the welding fixing shown in the figure, but bolting may be adopted, or a beam receiving unit similar to the beam receiving unit 16 shown in FIG. 7 may be provided, and the beam member 25 may be attached to the beam receiving unit. It is possible to make changes such as bolting.
【００２４】以上の実施例はいずれも、本体金属管２、
２２に形成する厚肉部３ａ、２３ａの内面に補強管３
ｂ、２３ｂを密着嵌合させて補強部３、２３を形成して
いるが、本発明はこの構成に限らず、厚肉部３ａ、２３
ａの外面に補強管を密着嵌合させて補強部を構成するこ
とも可能である。ただし、図示実施例に示すように、補
強管３ｂ、２３ｂを本体金属管２、２２の内側に配置し
た場合には、本体金属管２、２２の外面側に膨出する部
分が、厚肉部３ａ、２３ａのみであって、小さいので好
ましい。また、本体金属管２、２２を増肉加工して厚肉
部３ａ、２３ａを形成する際、外面側への膨出を適当な
型等によって抑制することにより、外面側への膨出量の
一層少ない厚肉部を形成することも可能であり、一層外
観の良い金属管を得ることができる。In each of the above embodiments, the main body metal tube 2,
The reinforcing pipe 3 is formed on the inner surfaces of the thick-walled portions 3a and 23a formed in 22.
Although the reinforcing portions 3 and 23 are formed by closely fitting b and 23b, the present invention is not limited to this configuration, and the thick portions 3a and 23 are not limited thereto.
It is also possible to form a reinforcing portion by closely fitting a reinforcing pipe to the outer surface of a. However, as shown in the illustrated embodiment, when the reinforcing pipes 3b and 23b are arranged inside the main body metal pipes 2 and 22, the portion that bulges to the outer surface side of the main body metal pipes 2 and 22 is a thick portion. Only 3a and 23a are preferable because they are small. In addition, when thickening the main body metal tubes 2 and 22 to form the thick portions 3a and 23a, the amount of bulging to the outer surface side can be reduced by suppressing the bulging to the outer surface side with a suitable mold or the like. It is also possible to form a thicker portion having a smaller number, and a metal tube having a better appearance can be obtained.
【００２５】次に、本発明の補強部付金属管の製造方法
を、図１、図２に示す角形鋼管からなる金属管１を例に
とって説明する。図１２は本発明方法の実施に用いる増
肉加工装置の１例を示す概略断面図、図１３（ａ）、
（ｂ）はそれぞれ図１２の矢印Ａ−Ａ断面図、矢印Ｂ−
Ｂ断面図、図１４は図１２における増肉加工部分の拡大
断面図である。３２は増肉加工すべき本体金属管２の一
端を定位置に固定、保持する固定装置、３３はその本体
金属管２の反対端を押圧して本体金属管２に管軸方向の
圧縮力を作用させる油圧シリンダ等の圧縮装置、３４
は、本体金属管２の長手方向の狭幅領域を環状に加熱し
て赤熱状態の加熱部３５とすることの可能な環状の加熱
装置であり、ここでは高周波加熱コイルが使用されてい
る。この加熱装置４は、本体金属管２に沿って矢印Ｃ方
向に移動する際に冷却水等の冷却媒体３７を加熱部３５
の移動方向に関して後端となる部分に吹き付ける冷却装
置３６（図１４参照）を備えている。３８は加熱装置３
４及び冷却装置３６を本体金属管２に沿って所望の速度
で移動させる移動装置である。移動装置３８としては、
モータと送りねじを用いたもの、モータと送り用チェー
ンを用いたもの、デジタルシリンダを用いたもの等任意
である。４０は、本体金属管２の内側の所定位置に、補
強管３ｂを同心状に位置させるための保持装置である。Next, a method of manufacturing a metal pipe with a reinforcing portion of the present invention will be described by taking the metal pipe 1 made of a rectangular steel pipe shown in FIGS. 1 and 2 as an example. FIG. 12 is a schematic cross-sectional view showing an example of a thickening processing apparatus used for carrying out the method of the present invention, FIG.
(B) is a cross-sectional view taken along the line AA in FIG.
14 is an enlarged cross-sectional view of the thickened portion in FIG. 32 is a fixing device that fixes and holds one end of the main body metal pipe 2 to be thickened in a fixed position, and 33 is pressed against the opposite end of the main body metal pipe 2 to apply a compressive force to the main body metal pipe 2 in the pipe axial direction. A compression device such as a hydraulic cylinder to act, 34
Is a ring-shaped heating device capable of heating a narrow region in the longitudinal direction of the main body metal tube 2 into a ring-shaped heating portion 35, and a high-frequency heating coil is used here. The heating device 4 applies a cooling medium 37 such as cooling water to the heating portion 35 when moving in the direction of arrow C along the main body metal tube 2.
The cooling device 36 (see FIG. 14) that blows onto the rear end portion in the moving direction of the. 38 is a heating device 3
4 and the cooling device 36 are moving devices that move the cooling device 36 and the cooling device 36 along the main metal tube 2 at a desired speed. As the moving device 38,
Any one using a motor and a feed screw, one using a motor and a feed chain, one using a digital cylinder, etc. is optional. Reference numeral 40 denotes a holding device for concentrically positioning the reinforcing pipe 3b at a predetermined position inside the main body metal pipe 2.
【００２６】次に、上記構成の増肉加工装置を用いて、
図１に示す補強部３を有する金属管１を製造する動作を
説明する。図１２に示すように、補強管３ｂを保持装置
４０に保持させ、且つその外側に本体金属管２をかぶ
せ、その一端を固定装置３２に固定、保持させ、その反
対端を油圧シリンダ等の圧縮装置３３で押圧して本体金
属管２に圧縮力を作用させる。この状態で、加熱装置３
４によって本体金属管２の長手方向の狭幅領域を加熱し
て、塑性変形容易な赤熱状態の加熱部３５とし、その加
熱部３５に圧縮力による増肉を生じさせながら、その加
熱装置３４を本体金属管２に沿って矢印Ｃ方向に移動さ
せ、同時に冷却装置３６から冷却媒体３７を加熱部３５
の後端部分に吹き付けて増肉直後の部分を冷却、固化す
る。これにより本体金属管２が長手方向に連続的に増肉
させられてゆき、内面側に増肉した部分は補強管３ｂの
外面に圧接される。かくして、加熱部３５を補強管３ｂ
の固定装置３２側の端部から、反対側の端部まで移動さ
せ、本体金属管２の増肉加工を行うことにより、補強管
３ｂに密着嵌合した厚肉部３ａが形成され、補強部３と
なる。Next, using the thickening processing apparatus having the above-mentioned structure,
The operation of manufacturing the metal pipe 1 having the reinforcing portion 3 shown in FIG. 1 will be described. As shown in FIG. 12, the reinforcing pipe 3b is held by the holding device 40, and the main body metal pipe 2 is covered on the outside thereof, one end of which is fixed and held by the fixing device 32, and the other end thereof is compressed by a hydraulic cylinder or the like. It is pressed by the device 33 to exert a compressive force on the main body metal tube 2. In this state, the heating device 3
The narrow region in the longitudinal direction of the main body metal tube 2 is heated by 4 to form a heating part 35 in a red heat state that is easily plastically deformed, and the heating device 34 is operated while increasing the thickness of the heating part 35 due to the compressive force. It is moved in the direction of arrow C along the main body metal tube 2, and at the same time, the cooling medium 37 is moved from the cooling device 36 to the heating unit 35.
The portion immediately after the thickness increase by spraying to the rear end portion is cooled and solidified. As a result, the main body metal tube 2 is continuously thickened in the longitudinal direction, and the thickened portion on the inner surface side is pressed against the outer surface of the reinforcing tube 3b. Thus, the heating portion 35 is connected to the reinforcing pipe 3b.
By moving from the end on the side of the fixing device 32 to the end on the opposite side to increase the thickness of the main body metal pipe 2, a thick portion 3a tightly fitted to the reinforcement pipe 3b is formed. It becomes 3.
【００２７】ここで、増肉前の本体金属管２の内面と、
その中にセットされる補強管３ｂの外面との間隙ｇは、
本体金属管２を増肉加工した際に増肉によって内側に変
形する管壁の内面が補強管３ｂの外面に圧接されるよう
に定められている。一般に、本体金属管２等の管体を圧
縮して増肉させる際、内外面を拘束しない場合には、増
肉は内側、外側にほぼ等しく生じる。従って、間隙ｇ
は、本体金属管２に生じさせる増肉量の１／２より小さ
く、すなわち、
ｇ＜（ｔ1 −ｔ0 ）／２
に設定されている。かくして、増肉加工により形成され
た厚肉部３ａが確実に補強管３ｂに密着嵌合することと
なり、両者が強固に接合された補強部３が形成される。Here, the inner surface of the main body metal tube 2 before thickening,
The gap g with the outer surface of the reinforcing pipe 3b set therein is
It is set so that the inner surface of the tube wall, which is deformed inward by increasing the thickness of the main body metal tube 2, is pressed against the outer surface of the reinforcing tube 3b. Generally, when compressing a body such as the main body metal pipe 2 to increase the thickness, if the inner and outer surfaces are not constrained, the thickness increase occurs almost equally on the inside and the outside. Therefore, the gap g
Is smaller than 1/2 of the amount of increase in the thickness of the main body metal tube 2, that is, g <(t 1 −t 0 ) / 2. Thus, the thick portion 3a formed by the thickening process is surely fitted tightly to the reinforcing pipe 3b, and the reinforcing portion 3 in which both are firmly joined is formed.
【００２８】ところで、上記したように、本体金属管２
を管軸方向に圧縮して増肉させる際の増肉率β〔＝（ｔ
1 −ｔ0 ）／ｔ0 〕は、加熱部３５の移動速度及びその
加熱部３５に向かって押し込まれる本体金属管２の未増
肉部分の速度によって決まる。いま、図１２において、
加熱部３５の後ろに位置する厚肉部３ａ及びその後ろの
非増肉部分２ａに対する加熱部３５の移動速度をＷ、加
熱部３５の前の未増肉部分２ｂの移動速度をＶとする
と、増肉率βは、
β＝Ｖ／Ｗ
で表される。ここで、この実施例では、厚肉部３ａ及び
その後ろの非増肉部分２ａは固定装置３２によって移動
しないように構成されているため、上記した加熱部３５
の移動速度Ｗは、加熱装置３４の移動速度に等しく、ま
た、未増肉部分２ｂの移動速度Ｖは圧縮装置３３が本体
金属管２の端部を押し込む速度に等しくなっている。従
って、加熱装置３４の移動速度Ｗと圧縮装置３３による
押し込み速度Ｖの比を一定に保つことにより、例えば、
加熱装置３４の移動速度Ｗを一定に保ち且つ圧縮装置３
３による押し込み速度Ｖを一定に保つことにより、一定
増肉率での増肉加工が行われる。ここで、圧縮装置３３
による押し込み速度を一定に保つには、圧縮装置３３に
よる圧縮力を一定に保ち且つ加熱部３５の温度を一定に
保つ（これにより加熱部３５の平均変形抵抗を一定に保
つ）方法、圧縮装置３３として押し込み速度を制御可能
なもの（例えば、デジタルシリンダ、デジタルサーボ機
構等を備えたもの）を用い、圧縮装置３３の制御により
一定の押し込み速度に保持する方法等を用いることがで
きる。By the way, as described above, the main body metal tube 2
Increase ratio β [= (t
1− t 0 ) / t 0 ] is determined by the moving speed of the heating part 35 and the speed of the unthickened part of the main body metal tube 2 pushed toward the heating part 35. Now in FIG.
When the moving speed of the heating portion 35 with respect to the thick portion 3a located behind the heating portion 35 and the non-thickened portion 2a behind the heating portion 35 is W, and the moving speed of the unthickened portion 2b in front of the heating portion 35 is V, The thickness increase rate β is represented by β = V / W. Here, in this embodiment, the thick portion 3a and the non-thickened portion 2a behind the thick portion 3a are configured so as not to move by the fixing device 32.
The moving speed W is equal to the moving speed of the heating device 34, and the moving speed V of the non-thickened portion 2b is equal to the speed at which the compression device 33 pushes the end of the main body metal tube 2. Therefore, by keeping the ratio of the moving speed W of the heating device 34 and the pushing speed V of the compression device 33 constant, for example,
The moving speed W of the heating device 34 is kept constant and the compression device 3
By keeping the pushing speed V by 3 constant, the thickening processing is performed at a constant thickening rate. Here, the compression device 33
In order to keep the pushing speed of the heating device 35 constant, the compression force of the compression device 33 is kept constant and the temperature of the heating part 35 is kept constant (therefore, the average deformation resistance of the heating part 35 is kept constant). For example, a method capable of controlling the pushing speed (for example, one having a digital cylinder, a digital servo mechanism, etc.) may be used, and a method of maintaining a constant pushing speed by controlling the compression device 33 may be used.
【００２９】上記した増肉加工を行う際の増肉率βは、
当然補強部３に形成すべき厚肉部３ａの厚さｔ1 が確保
されるように定めるものである。ところで、補強部３に
必要とされる全体の厚さｔは、補強管３ｂの厚さｔ2 を
大きく設定することにより、厚肉部３ａの厚さｔ1 をさ
ほど大きくしなくても得られるので、厚肉部３ａの厚さ
ｔ1 は増肉加工によって厚肉部３ａを補強管３ｂに密着
嵌合させることができる範囲内で、小さく設定すればよ
い。従って、本体金属管２と補強管３ｂとの間隙ｇを小
さく設定できれば、増肉率βは０．１〜０．３程度でよ
い。このような小さい増肉率での増肉加工は、０．３を
越えるような大きい増肉率での増肉加工に比べてきわめ
て容易である。すなわち、大きい増肉率での増肉加工を
行う場合には、安定して増肉を生じさせるため、加熱部
の加熱幅、加熱温度、加工速度等の条件を狭い範囲に設
定し且つ制御する必要があるが、低増肉率の場合には比
較的ラフな設定、制御で良好な増肉加工が可能である。
特に、増肉率を大きくした場合には加熱部の温度を高く
（例えば鋼管では通常１３００°Ｃ程度に）設定するこ
とが必要であり、このため、加熱増肉後に冷却すること
で、増肉加工部が焼入れされた状態となり、伸び特性が
大きく低下する欠点を生じるが、増肉率を小さくするこ
とで、加熱部温度を低く（例えば鋼管では通常１１００
°Ｃ程度に）設定することが可能となり、加工硬化を抑
制できる利点が得られる。The thickness increase ratio β when performing the above-mentioned thickness increase processing is
As a matter of course, the thickness t 1 of the thick portion 3a to be formed in the reinforcing portion 3 is determined. By the way, the total thickness t required for the reinforcing portion 3 can be obtained by setting the thickness t 2 of the reinforcing pipe 3b to be large without increasing the thickness t 1 of the thick portion 3a. Therefore, the thickness t 1 of the thick portion 3a may be set small within a range in which the thick portion 3a can be closely fitted to the reinforcing pipe 3b by the thickening process. Therefore, if the gap g between the main body metal pipe 2 and the reinforcing pipe 3b can be set small, the thickness increase ratio β may be about 0.1 to 0.3. The thickness increasing process with such a small thickness increasing ratio is extremely easy as compared with the thickness increasing process with a large thickness increasing ratio exceeding 0.3. That is, when performing a thickening process with a large thickness increasing rate, in order to stably cause the thickening, the conditions such as the heating width of the heating portion, the heating temperature, the processing speed are set and controlled within a narrow range. Although it is necessary, if the wall thickness increase rate is low, it is possible to perform good wall thickness increase processing with a relatively rough setting and control.
In particular, when the thickness increase rate is increased, it is necessary to set the temperature of the heating portion high (for example, in the case of a steel pipe, it is usually about 1300 ° C). Although the processed part becomes hardened and the elongation characteristic is greatly deteriorated, the heating part temperature is lowered by decreasing the thickness increase rate (for example, in the case of a steel pipe, it is usually 1100).
It is possible to set the temperature to about ° C), and there is an advantage that work hardening can be suppressed.
【００３０】また、角形鋼管からなる本体金属管２をフ
リーな状態で増肉加工した場合、圧縮変形及び冷却によ
る収縮変形等により、図１５に示すように、得られた厚
肉部３ａ′の断面形状は、平坦であるべき側壁が内側に
凹み、その位置に凹み４２（凹み量ｅ）を生じ、平坦度
が低下するという現象が生じ勝ちである。これに対し、
本実施例においては、図１３に示すように、内側に補強
管３ｂが存在しており、本体金属管２の増肉により生じ
た厚肉部３ａが補強管３ｂに押し付けられ、形状が規制
される。このため、図１５に示すような凹み４２の発生
が抑制され、図１３（ｂ）に示すように、平坦度の良い
側壁を備えた厚肉部３ａが形成される。Further, when the main body metal pipe 2 made of a rectangular steel pipe is thickened in a free state, as shown in FIG. 15, due to compression deformation, shrinkage deformation due to cooling, etc., the obtained thick wall portion 3a 'is formed. Regarding the cross-sectional shape, a side wall that should be flat is dented inward, and a dent 42 (dent amount e) is generated at that position, and the flatness is likely to decrease. In contrast,
In the present embodiment, as shown in FIG. 13, the reinforcing pipe 3b is present inside, and the thick portion 3a generated by the increased thickness of the main body metal pipe 2 is pressed against the reinforcing pipe 3b, and the shape is restricted. It Therefore, the formation of the depression 42 as shown in FIG. 15 is suppressed, and as shown in FIG. 13B, the thick portion 3a having the side wall with good flatness is formed.
【００３１】更に、本体金属管２をフリーな状態で増肉
加工した場合、図１６（ａ）に示すように、本体金属管
２が増肉を生じている部分で大きくたわんだり、図１６
（ｂ）に示すように厚肉部３ａに蛇腹状の変形が生じた
りすることが多い。この現象は、増肉率βを大きくした
場合顕著に生じ勝ちである。これに対し本実施例では、
本体金属管２の増肉した部分が直ちに、補強管３ｂに押
し付けられ、それで拘束されるため、図１６に示すよう
なたわみや蛇腹状の変形が生じにくく、真直度の良い且
つ外観の良い厚肉部３ａが形成される。Further, when the main body metal pipe 2 is thickened in a free state, as shown in FIG. 16 (a), the main body metal pipe 2 is largely bent at a portion where the thickness is increased,
As shown in (b), a bellows-like deformation often occurs in the thick portion 3a. This phenomenon tends to occur remarkably when the thickness increase rate β is increased. On the other hand, in this embodiment,
Since the thickened portion of the main body metal tube 2 is immediately pressed against the reinforcing tube 3b and restrained by it, the bending and bellows-like deformation as shown in FIG. 16 are unlikely to occur, and the thickness of the straightness and good appearance is good. The meat part 3a is formed.
【００３２】図１７、図１８は本発明方法の更に他の実
施例を示すものである。この実施例では、加熱装置３４
の後ろ側に加熱装置３４と一緒に移動するように外面用
成形ダイス５０が配置されている。この外面用成形ダイ
ス５０は、増肉よって外側に変形する管壁の外面位置を
規制するダイス面５０ａを有すると共に、内部を冷却媒
体で冷却する構成となっており、そのダイス面５０ａに
接触した管壁を冷却可能である。従って、この実施例で
は外面用成形ダイス５０が、本体金属管２の加熱部３５
の後端を冷却する冷却装置を構成する。なお、この外面
用成形ダイス５０の後ろに冷却媒体を本体金属管２に噴
射して冷却する冷却装置を配置してもよい。17 and 18 show another embodiment of the method of the present invention. In this embodiment, the heating device 34
An outer surface forming die 50 is arranged so as to move together with the heating device 34 on the rear side of the. The outer surface molding die 50 has a die surface 50a that restricts the outer surface position of the tube wall that is deformed outward by increasing the wall thickness, and is configured to cool the inside with a cooling medium, and is in contact with the die surface 50a. It is possible to cool the tube wall. Therefore, in this embodiment, the outer surface molding die 50 is the heating portion 35 of the main body metal tube 2.
A cooling device that cools the rear end is configured. A cooling device for injecting a cooling medium onto the main body metal tube 2 to cool it may be disposed behind the outer surface molding die 50.
【００３３】この外面用成形ダイス５０と、本体金属管
２の内側に配置された補強管３ｂとの間隔は、増肉加工
によって形成する厚肉部３ａの厚さｔ1 に等しく設定さ
れている。外面用成形ダイス５０と本体金属管２の外面
との間隙ｇ′は、通常、管壁が増肉により外面側に増肉
する量よりも小さく、すなわち、
ｇ′＜（ｔ1 −ｔ0 ）／２
に設定されている。従って、この場合には、本体金属管
２と補強管３ｂとの間隙ｇは、
ｇ ＞（ｔ1 −ｔ0 ）／２
となっている。その他の構成は上記した実施例と同様で
ある。The distance between the outer surface molding die 50 and the reinforcing pipe 3b arranged inside the main body metal pipe 2 is set to be equal to the thickness t 1 of the thick portion 3a formed by the thickening process. . Gap g between the outer surface for molding die 50 and the outer surface of the body metal tube 2 'is normally smaller than the amount the tube wall is thickened on an outer surface side by the thickening, i.e., g'<(t 1 -t 0) It is set to / 2. Therefore, in this case, the gap g between the main metal tube 2 and the reinforcing tube 3b is g> and has a (t 1 -t 0) / 2 . Other configurations are the same as those in the above-described embodiment.
【００３４】図１７、図１８の実施例においては、本体
金属管２に圧縮力を作用させた状態で、加熱装置３４が
本体金属管２を局部的に加熱して加熱部３５とし、且つ
本体金属管２に沿って矢印Ｃ方向に移動する。これによ
り、加熱部３５に増肉が生じ且つその後端が外面用成形
ダイス５０で冷却、固化されながら、その加熱部３５が
本体金属管２の長手方向に移動し、連続的に増肉が行わ
れる。この際、増肉によって外面側に増肉しようとする
加熱部３５の管壁が外面用成形ダイス５０によって抑制
され、その分内面側に増肉が生じ、補強管３ｂに押し付
けられる。かくして、外面側の寸法を外面用成形ダイス
５０で規制しながら、厚肉部３ａが形成され且つ内部に
配置した補強管３ｂに密着嵌合され、補強部３が形成さ
れる。この実施例で得られた補強部３は、その外面を外
面用成形ダイス５０で規制したことにより、本体金属管
２からの膨出量が小さくなっており、且つ外面がきわめ
て平滑となっている。In the embodiment of FIGS. 17 and 18, the heating device 34 locally heats the main body metal tube 2 into the heating section 35 in a state where a compressive force is applied to the main body metal tube 2, and It moves in the direction of arrow C along the metal tube 2. As a result, the heating portion 35 is increased in thickness and the rear end thereof is cooled and solidified by the outer surface forming die 50, while the heating portion 35 is moved in the longitudinal direction of the main body metal tube 2 to continuously increase the thickness. Be seen. At this time, the tube wall of the heating portion 35, which tends to increase in thickness to the outer surface side due to the increase in thickness, is suppressed by the outer surface forming die 50, and the increase in thickness occurs on the inner surface side by that amount, and is pressed against the reinforcing pipe 3b. In this way, while the outer surface side dimension is regulated by the outer surface molding die 50, the thick portion 3a is formed and is closely fitted to the reinforcing pipe 3b arranged inside to form the reinforcing portion 3. Since the outer surface of the reinforcing portion 3 obtained in this embodiment is regulated by the outer surface forming die 50, the amount of bulging from the main body metal tube 2 is small and the outer surface is extremely smooth. .
【００３５】なお、上記実施例はいずれも、本体金属管
２の内側に補強管３ｂを配置しているが、本発明はこの
構成に限らず、外面側に補強管を配置することも可能で
ある。なお、この場合には、加熱装置３４及び冷却装置
３６が本体金属管２の内側を移動する構成とすればよ
い。また、本発明方法は、角形鋼管に対して適用する場
合に限らず、丸形鋼管等の円形断面の金属管に対しても
適用可能であることは言うまでもない。In each of the above embodiments, the reinforcing pipe 3b is arranged inside the main body metal pipe 2, but the present invention is not limited to this structure, and the reinforcing pipe can be arranged on the outer surface side. is there. In this case, the heating device 34 and the cooling device 36 may move inside the main body metal tube 2. Further, it goes without saying that the method of the present invention is not limited to the case of being applied to a square steel pipe, but can be applied to a metal pipe having a circular cross section such as a round steel pipe.
【００３６】[0036]
【実施例】以下、具体的に増肉加工を行った例を示す。
〔実施例１〕
使用装置
図１２に示す構成の増肉加工装置。各部仕様は次の通
り。
加熱装置３４：高周波加熱コイル（幅２０ｍｍ）
冷却装置３６：水冷却方式
加熱幅（加熱装置３４の先端から水吹き付け位置までの
距離）：４０ｍｍ
圧縮装置３３：油圧シリンダ[Examples] Hereinafter, examples of concrete thickening will be described. [Example 1] Used device A thickening device having a configuration shown in Fig. 12. Specifications of each part are as follows. Heating device 34: high frequency heating coil (width 20 mm) Cooling device 36: water cooling system heating width (distance from the tip of heating device 34 to the water spraying position): 40 mm compression device 33: hydraulic cylinder
【００３７】 増肉加工条件
供試本体金属管：３００×３００ｍｍ×１２ｍｍｔの角
形鋼管
補強管：２７０×２７０ｍｍ×１２ｍｍｔの角形鋼管、
長さ１０００ｍｍ
増肉率β：０．５（厚み１２ｍｍを１８ｍｍに増肉）
加熱部最高温度：１３００°Ｃ
加熱装置３４の移動速度Ｗ：２ｍｍ／ｓ
圧縮装置３３による圧縮力Ｐ：２５，５００ｋｇ（この
結果圧縮装置３３による押し込み速度Ｖ＝１ｍｍ／ｓと
なる）
増肉加工速度（Ｗ＋Ｖ）：３ｍｍ／ｓThickening conditions Test body Metal tube: 300 × 300 mm × 12 mmt square steel tube Reinforcing tube: 270 × 270 mm × 12 mmt square steel tube,
Length 1000 mm Thickness increase ratio β: 0.5 (thickness increased from 12 mm to 18 mm) Heating part maximum temperature: 1300 ° C Moving speed W of heating device 34: 2 mm / s Compressive force P by compression device 33: 25,500 kg (As a result, the pushing speed V by the compression device 33 becomes V = 1 mm / s.) Thickness increase processing speed (W + V): 3 mm / s
【００３８】 増肉加工結果
上記した増肉加工条件で増肉加工を行い、長さ約７００
ｍｍの厚肉部３ａを形成した。得られた厚肉部３ａの外
形寸法は約３０３×３０３ｍｍであり、その内面には補
強管３ｂが強固に密着嵌合され、全体の厚さが３０ｍｍ
の補強部３を形成していた。その補強部３の外面即ち厚
肉部３ａの外面は、平滑であり、ジャバラや小じわの無
い良好な外観を備えていた。Result of thickness increase processing Thickness increase processing was performed under the above-mentioned thickness increase processing conditions, and a length of about 700
The thick part 3a of mm was formed. The outer dimension of the obtained thick portion 3a is about 303 × 303 mm, and the reinforcing pipe 3b is firmly and closely fitted to the inner surface of the thick portion 3a so that the entire thickness is 30 mm.
The reinforcing portion 3 of the above was formed. The outer surface of the reinforcing portion 3, that is, the outer surface of the thick portion 3a was smooth and had a good appearance without bellows or fine wrinkles.
【００３９】[0039]
【発明の効果】以上に説明したように、本発明の補強部
付金属管は、本体金属管の長手方向の少なくとも１個所
に厚肉部を形成し且つその厚肉部の外側又は内側に補強
用金属管を密着嵌合させて補強部としたものであるの
で、これを建築物の柱材として使用すると、補強部に直
接梁材をボルト止め或いは溶接等によって接合すること
で、強固な柱、梁接合構造を形成でき、且つ柱材に対す
る梁材の接合作業をきわめて簡略化することができ、従
って、建築物の柱材としてきわてめ好適に使用できると
いう効果を有している。しかも、その補強部は本体金属
管の任意の位置に形成可能であるので、本体金属管を複
数階にわたる通し柱として使用可能な長さとし、各階の
梁取付位置に対応する位置に補強部を形成しておくこと
で、本発明の金属管を通し柱として使用することがで
き、一層施工の簡略化、迅速化が図れるという効果が得
られる。As described above, in the metal pipe with a reinforcing portion of the present invention, the thick metal portion is formed at least at one position in the longitudinal direction of the main body metal pipe, and the metal pipe is reinforced outside or inside the thick portion. Since it is a reinforcement part by closely fitting a metal pipe for use in a building, if this is used as a pillar material for a building, a beam material can be directly joined to the reinforcement part by bolting or welding to form a strong pillar. The present invention has an effect that a beam joint structure can be formed, and the work of joining a beam member to a column member can be extremely simplified, and therefore, it can be particularly suitably used as a column member of a building. Moreover, since the reinforcing portion can be formed at any position of the main body metal pipe, the main body metal pipe has a length that can be used as a through column extending over a plurality of floors, and the reinforcing portion is formed at a position corresponding to the beam mounting position on each floor. With this, the metal pipe of the present invention can be used as a through column, and the effect that the construction can be further simplified and speeded up can be obtained.
【００４０】更に、本発明の金属管に設けている補強部
は、本体金属管に形成した厚肉部とそれに密着嵌合させ
た補強用金属管とで構成されているため、補強用金属管
の厚さを大きくすることにより、厚肉部の厚さをあまり
大きくすることなく、全体の厚さを大きくして必要な補
強効果を確保でき、このため、製造が容易で、安価に製
造できるという効果も有している。Further, since the reinforcing portion provided in the metal pipe of the present invention is composed of the thick portion formed in the main body metal pipe and the reinforcing metal pipe closely fitted to the thick portion, the reinforcing metal pipe By increasing the thickness of the, the overall thickness can be increased and the necessary reinforcing effect can be secured without increasing the thickness of the thick portion, and therefore the manufacturing is easy and the manufacturing cost is low. It also has the effect.
【００４１】また、本発明の補強部付金属管の製造方法
は、本体金属管の長手方向の補強すべき個所の外側又は
内側に、前記本体金属管の本来外径よりも大きな内径を
有する補強用金属管又は本体金属管の本来内径よりも小
さな外径を有する補強用金属管を同心状に配置し、次い
で、前記本体金属管の、少なくとも補強用金属管に対向
する個所を赤熱下で管軸方向に圧縮して増肉させ、前記
補強用金属管に密着嵌合させることにより、本体金属管
に厚肉部を形成すると同時にその厚肉部を補強用金属管
に密着嵌合させて補強部を形成でき、簡単な操作により
強度の大きい補強部を形成できるという効果を有してい
る。また、本発明方法では、本体金属管に増肉を生じさ
せた際、補強用金属管が増肉の生じる部分に対する型の
役割を果たし、このため、増肉を生じる部分がたわむと
か、蛇腹状の変形を生じるということが防止され、良好
な形状の厚肉部を備えた補強部を容易に形成できるとい
う効果も有している。In the method for manufacturing a metal pipe with a reinforcing portion of the present invention, a reinforcement having an inner diameter larger than the outer diameter of the main body metal pipe is provided outside or inside the portion of the main body metal pipe to be reinforced in the longitudinal direction. A reinforcing metal pipe having an outer diameter smaller than the inner diameter of the main metal pipe or the main metal pipe is concentrically arranged, and then at least a portion of the main metal pipe facing the reinforcing metal pipe is heated under red heat. By axially compressing to increase the wall thickness and closely fitting it to the reinforcing metal pipe, a thick wall portion is formed on the main body metal pipe and at the same time the thick wall portion is tightly fitted to the reinforcing metal pipe for reinforcement. This has the effect that the reinforcing portion having a large strength can be formed by a simple operation. Further, in the method of the present invention, when the thickness increase occurs in the main body metal tube, the reinforcing metal tube plays a role of a mold for the portion where the thickness increase occurs, and therefore, the portion where the thickness increase occurs is bent or bellows-shaped. It is also possible to prevent the deformation of No. 1 and to easily form the reinforcing portion including the thick portion having a good shape.
【００４２】ここで、本体金属管を増肉させる方法とし
て、厚肉部を形成する領域の一部を狭幅環状に赤熱して
増肉させると共にその赤熱位置を管軸方向に連続的に移
動させ且つその後端部分を冷却することで、連続的に増
肉させてゆく方法を用いると、所望の長さ範囲に渡っ
て、安定して均一な増肉を行うことができ、本体金属管
の所望位置に、所望長さの補強部を容易に且つ良好に形
成できるという効果が得られる。Here, as a method of increasing the thickness of the main body metal tube, a part of the region forming the thick wall portion is red-heated in a narrow annular shape to increase the thickness and the red-hot position is continuously moved in the tube axial direction. By using the method of continuously increasing the wall thickness by cooling and cooling the rear end portion, it is possible to stably and uniformly increase the wall thickness over a desired length range. The effect that the reinforcing portion having a desired length can be easily and favorably formed at a desired position is obtained.
【図１】本発明の一実施例による補強部付金属管の一部
を示す概略縦断面図FIG. 1 is a schematic vertical sectional view showing a part of a metal pipe with a reinforcing portion according to an embodiment of the present invention.
【図２】その金属管の概略横断面図FIG. 2 is a schematic cross-sectional view of the metal tube.
【図３】その金属管を通し柱として使用した状態を示す
概略側面図FIG. 3 is a schematic side view showing a state where the metal tube is used as a through column.
【図４】金属管と梁材との取付構造を示す概略斜視図FIG. 4 is a schematic perspective view showing a mounting structure of a metal tube and a beam member.
【図５】図４に示す部分の概略断面図5 is a schematic cross-sectional view of the portion shown in FIG.
【図６】金属管と梁材との取付構造の変形例を示す概略
断面図FIG. 6 is a schematic cross-sectional view showing a modified example of the mounting structure of the metal tube and the beam member.
【図７】金属管と梁材との取付構造の他の変形例を示す
概略断面図FIG. 7 is a schematic cross-sectional view showing another modified example of the mounting structure of the metal tube and the beam member.
【図８】金属管と梁材との取付構造の更に他の変形例を
示す概略斜視図FIG. 8 is a schematic perspective view showing still another modified example of the mounting structure of the metal tube and the beam member.
【図９】金属管と梁材との取付構造の更に他の変形例を
示す概略断面図FIG. 9 is a schematic cross-sectional view showing still another modified example of the mounting structure of the metal tube and the beam member.
【図１０】本発明の他の実施例による金属管に対する梁
材の取付構造を示す概略斜視図FIG. 10 is a schematic perspective view showing a beam member mounting structure for a metal tube according to another embodiment of the present invention.
【図１１】図１０に示す部分の概略断面図11 is a schematic cross-sectional view of the portion shown in FIG.
【図１２】本発明方法の実施に用いる増肉加工装置の１
例を示す概略断面図FIG. 12: 1 of thickening processing apparatus used for carrying out the method of the present invention
Schematic cross section showing an example
【図１３】（ａ）、（ｂ）はそれぞれ、図１のＡ−Ａ矢
視断面図、Ｂ−Ｂ矢視断面図13 (a) and (b) are cross-sectional views taken along arrows AA and BB of FIG. 1, respectively.
【図１４】図１２の実施例における増肉加工部分の拡大
断面図FIG. 14 is an enlarged cross-sectional view of the thickened portion in the embodiment of FIG.
【図１５】フリーな状態で増肉加工して得た厚肉部の概
略断面図FIG. 15 is a schematic cross-sectional view of a thick portion obtained by thickening in a free state.
【図１６】（ａ）、（ｂ）はそれぞれ、フリーな状態で
増肉加工した時の厚肉部の概略断面図16 (a) and 16 (b) are schematic cross-sectional views of a thick portion when thickening is performed in a free state.
【図１７】本発明方法の実施に用いる増肉加工装置の他
の例を示す概略断面図FIG. 17 is a schematic cross-sectional view showing another example of the thickening processing apparatus used for carrying out the method of the present invention.
【図１８】図１７に示す他の実施例における増肉加工部
分の拡大断面図FIG. 18 is an enlarged cross-sectional view of a thickness increasing portion in another embodiment shown in FIG.
１、２１ 補強部付金属管（金属管） ２、２２ 本体金属管 ３、２３ 補強部 ３ａ、２３ａ 厚肉部 ３ｂ、２３ｂ 補強用金属管（補強管） ５、２５ 梁材 ６ 基礎 ７ 固定金具 ８ ねじ孔 １０ スプリットティー １４ エンドプレート １６ 梁受け部 ３２ 固定装置 ３３ 圧縮装置 ３４ 加熱装置 ３５ 加熱部 ３６ 冷却装置 ３７ 冷却媒体 ３８ 移動装置 ４０ 保持装置 ５０ 外面用成形ダイス 1, 21 Metal tube with reinforced part (metal tube) 2.22 Main body metal tube 3,23 Reinforcement part 3a, 23a thick part 3b, 23b Reinforcing metal pipe (reinforcing pipe) 5,25 beam material 6 foundation 7 Fixing bracket 8 screw holes 10 split tea 14 End plate 16 Beam receiving part 32 Fixing device 33 Compressor 34 Heating device 35 heating part 36 Cooling system 37 Cooling medium 38 Moving device 40 holding device 50 Molding die for outer surface
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−185839（ＪＰ，Ａ) 特開 昭59−223115（ＪＰ，Ａ) 特開 昭62−61721（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) E04C 3/32 B21J 1/06 B21J 5/08 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-185839 (JP, A) JP-A-59-223115 (JP, A) JP-A-62-61721 (JP, A) (58) Field (Int.Cl. 7 , DB name) E04C 3/32 B21J 1/06 B21J 5/08
Claims (3)
所に、管軸方向の圧縮力を加えて増肉させた厚肉部が形
成されており、該厚肉部の外側又は内側に補強用金属管
が密着嵌合され補強部を形成しており、前記補強用金属
管は前記厚肉部の形成工程における前記本体金属管の増
肉によって前記厚肉部に密着嵌合していることを特徴と
する補強部付金属管。1. A main body metal pipe is provided with a thick portion thickened by applying a compressive force in the pipe axial direction at least at one position in the longitudinal direction, and a reinforcing portion is provided outside or inside the thick portion. metal tube forms a fitted reinforcement portion contact, the metal reinforcement
For the pipe, the body metal pipe is increased in the process of forming the thick portion.
A metal pipe with a reinforcing portion, which is closely fitted to the thick portion by a meat .
の外側又は内側に、前記本体金属管の本来外径よりも大
きな内径を有する補強用金属管又は本体金属管の本来内
径よりも小さな外径を有する補強用金属管を同心状に配
置し、次いで、前記本体金属管の、少なくとも補強用金
属管に対向する個所を赤熱下で管軸方向に圧縮して増肉
させ、前記補強用金属管に密着嵌合させることを特徴と
する、請求項１に記載の補強部付金属管の製造方法。2. A reinforcing metal pipe having an inner diameter larger than the outer diameter of the main body metal pipe or smaller than the inner diameter of the main body metal pipe on the outside or inside of the portion to be reinforced in the longitudinal direction of the main body metal pipe. A reinforcing metal pipe having an outer diameter is concentrically arranged, and then at least a portion of the main body metal pipe facing the reinforcing metal pipe is compressed in the pipe axial direction under red heat to increase the thickness, and The method for manufacturing a metal pipe with a reinforcing portion according to claim 1, wherein the metal pipe is closely fitted to the metal pipe.
の外側又は内側に、前記本体金属管の本来外径よりも大
きな内径を有する補強用金属管又は本体金属管の本来内
径よりも小さな外径を有する補強用金属管を同心状に配
置し、次いで、前記本体金属管に管軸方向の圧縮力を加
えた状態で、少なくとも前記本体金属管の、補強用金属
管に対向する個所を、その一端側から狭幅環状に赤熱し
て増肉させると共にその赤熱位置を管軸方向に連続的に
移動させ且つその後端部分を冷却することで、連続的に
増肉させ、前記補強用金属管に密着嵌合させることを特
徴とする、請求項１に記載の補強部付金属管の製造方
法。3. A reinforcing metal pipe having an inner diameter larger than the outer diameter of the main body metal pipe or smaller than the inner diameter of the main body metal pipe outside or inside the portion of the main body metal pipe to be reinforced in the longitudinal direction. Arranging reinforcing metal pipes having an outer diameter concentrically, and then applying a compressive force in the pipe axial direction to the main body metal pipe, at least the portion of the main body metal pipe facing the reinforcing metal pipe. , The thickness of the reinforcing metal is continuously increased by red-hotly increasing the thickness of the narrow annular shape from one end side thereof and continuously moving the red-hot position in the pipe axis direction and cooling the rear end portion thereof. The method for producing a metal pipe with a reinforcing portion according to claim 1, wherein the metal pipe is closely fitted to the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22966695A JP3444702B2 (en) | 1995-08-14 | 1995-08-14 | Metal tube with reinforcement and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22966695A JP3444702B2 (en) | 1995-08-14 | 1995-08-14 | Metal tube with reinforcement and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0953300A JPH0953300A (en) | 1997-02-25 |
| JP3444702B2 true JP3444702B2 (en) | 2003-09-08 |
Family
ID=16895780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22966695A Expired - Fee Related JP3444702B2 (en) | 1995-08-14 | 1995-08-14 | Metal tube with reinforcement and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3444702B2 (en) |
-
1995
- 1995-08-14 JP JP22966695A patent/JP3444702B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0953300A (en) | 1997-02-25 |
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