JP4206493B2 - Tubing material and tubular material joining apparatus using the same - Google Patents
Tubing material and tubular material joining apparatus using the same Download PDFInfo
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【０００１】
【発明の属する技術分野】
本発明は、建築用足場等に用いられる管材およびこれを用いた管材接合装置に関するものである。
【０００２】
【従来の技術】
従来、建築用足場の支柱や踏桟（横桟）などを構成する管材としては、円管が多く使用されている。そして、円管よりなる支柱の所要高さに、支柱より径小の円管よりなる踏桟を溶接により連結するには、支柱の踏桟接合予定箇所に踏桟の外径とほゞ同じ大きさを有する貫通孔をあけておき、踏桟の先端部をこの支柱の貫通孔に差し込んで、踏桟の先端寄り部分と貫通孔周縁の支柱壁部分とを踏桟の全周にわたって溶接していた。
【０００３】
【発明が解決しようとする課題】
しかしながら、このような従来法によれば、円管よりなる支柱の踏桟接合予定箇所ににおいて曲面状側壁に所定の大きさの貫通孔あける加工作業が非常に面倒であり、手間がかかるという問題があった。また支柱の曲面状側壁に貫通孔をあけると、それだけ支柱の強度が低下するという問題があった。
【０００４】
本発明の目的は、上記の従来技術の問題を解決し、建築用足場の支柱等に用いられる管材として強度が非常に大きく、しかも踏桟等の他の管材との溶接による連結作業を容易かつ安価に行ない得る新規な形状を有する管材を提供すること、およびこの管材を支柱等の第１管材として用い、この第１管材に対して踏桟等の第２管材を直角状に接合する装置であって、溶接のための管材の加工作業が非常に簡単で、しかも溶接による接合強度が非常に大きく、さらに、例え多少の溶接不備や割れ等が発生しても、踏桟等の第２管材が一気に脱落するおそれがない、きわめて安全性の高い管材接合装置を提供することにある。
【０００５】
【課題を解決するための手段】
上記の目的を達成するために、本発明の請求項１記載の管材は、横断面半円より大きい円弧形を有する曲面状壁部と、これの両側縁に連なりかつ長手方向にのびる平坦壁部と、平坦壁部に外方突出状にかつ長手方向にのびるように設けられた外方凸条とよりなる管材において、外方凸条は、平坦壁部の幅中央部に設けられており、外方凸条の先端と管材の曲面状壁部の中心との距離が、曲面状壁部の円弧形横断面の半径に等しいものとなされていることを特徴としている。
また、上記管材の外方凸条は、平坦壁部に平行状に複数設けられる場合もあり、各外方凸条の先端と管材の曲面状壁部の中心との距離が、曲面状壁部の円弧形横断面の半径に等しいものとなされている。なおこの場合、外方凸条は、平坦壁部の両側縁部よりそれぞれ幅１／３の箇所に平行状に２つ設けるのが好ましい。
【０００６】
本発明の請求項３記載の管材接合装置は、請求項１記載の管材を第１管材として用い、この第１管材に対して第２管材を直角状に接合する装置であって、第１管材の第２管材接合予定箇所において外方凸条に、第２管材端部の上下壁部分を嵌め入れる一対の切欠きが設けられており、第１管材の平坦壁部に対して第２管材の端部が直角状に突き合わせられて、第２管材端部の上下壁部分が第１管材の外方凸条の一対の切欠きに嵌め入れられた状態で、外方凸条の両側において第２管材の端部が第１管材の平坦壁部に溶接されていることを特徴としている。
【０００７】
上記管材接合装置において、第１管材の外方凸条は、平坦壁部の幅中央部に設けられており、外方凸条の先端と第１管材の曲面状壁部の中心との距離が、曲面状壁部の円弧形横断面の半径に等しいものとなされている。
【０００８】
また、上記管材接合装置において、第１管材の外方凸条が、平坦壁部に平行状に複数設けられる場合もあり、各外方凸条の先端と第１管材の曲面状壁部の中心との距離が、曲面状壁部の円弧形横断面の半径に等しいものとなされ、第１管材の第２管材接合予定箇所において各外方凸条に、第２管材端部の相互に対向する上下壁部分を嵌め入れる一対の切欠きが設けられている。
【０００９】
なお、上記管材接合装置において、第２管材としては、通常、円管または角管を用いるが、本発明による上記請求項１記載の管材を、第２管材として用いることもできる。
【００１０】
【発明の実施の形態】
つぎに、本発明の実施の形態を、図面を参照して説明する。
【００１１】
この明細書において、前後、左右は図３を基準とし、前とは図３の右側、後とは同左側をいゝ、また左とは同図の下側、右とは同上側をいうものとする。
【００１２】
図１〜図３は、本発明の管材を、建築用枠組足場（１０）の支柱（１）に適用するとともに、本発明の管材接合装置を、支柱（１）と踏桟（横桟）（１１）の連結に適用した第１実施形態を示すものである。
【００１３】
まず、図１を参照すると、建築用枠組足場（１０）は、前後一対ずつ複数組配置された本発明の管材よりなる支柱（１）と、前後支柱（１）（１）同士の間に渡された多数の踏桟（１１）と、足場（１０）の所要高さにおいて水平状に配置された足場板（１２）と、高さ違いの踏桟（１１）同士を連結する多数の筋かい（１３）とを備えている。
【００１４】
つぎに、図２に示すように、本発明の管材よりなる支柱（１）は、アルミニウム（アルミニウム合金を含む）押出形材製であって、横断面半円より大きい円弧形を有する曲面状壁部（２）と、これの両側縁に連なりかつ長手方向にのびる平坦壁部（３）と、平坦壁部（３）の幅中央部に外方突出状にかつ長手方向にのびるように設けられた外方凸条（４）とよりなり、外方凸条（４）の先端と曲面状壁部（２）の中心との距離は、曲面状壁部（２）の円弧形横断面の半径に等しいものとなされている。
【００１５】
上記本発明の管材よりなる支柱（第１管材）（１）と、円管よりなる踏桟（第２管材）（１１）とが、本発明の管材接合装置によって接合されている。
【００１６】
すなわち、まず図２ａを参照すると、支柱（１）の踏桟接合予定箇所において外方凸条（４）に、踏桟（１１）の端部（１１ａ）の上下壁部分を嵌め入れる一対の切欠き（５）（５）が設けられている。
【００１７】
つぎに図２ｂを参照すると、支柱（１）の外方凸条（４）の一対の切欠き（５）（５）に踏桟（１１）の端部（１１ａ）の上下壁部分が嵌め入れられて、踏桟（１１）の端部（１１ａ）が平坦壁部（３）に対して直角状に突き合わせられ、この状態で、外方凸条（４）の両側において踏桟（１１）の端部（１１ａ）が支柱（１）の平坦壁部（３）に溶接されている。
【００１８】
上記本発明の管材よりなる支柱（１）によれば、外方凸条（４）が平坦壁部（３）の幅中央部に設けられているから、溶接のための切断加工が簡単であり、踏桟（１１）との溶接による連結作業を容易かつ安価に行ない得、しかも溶接による接合強度が非常に大きいものである。
【００１９】
また、踏桟（１１）の端部（１１ａ）の溶接の際、例え多少の溶接不備や割れ等が発生しても、踏桟端部（１１ａ）の内部に、支柱（１）の外方凸条（４）の部分切削により断続した外方凸起（４ａ）が存在しているため、踏桟（１１）の端部（１１ａ）がこの外方凸起（４ａ）、並びに踏桟端部（１１ａ）下側の外方凸条（４）の上端部に掛かり合い、従って踏桟（１１）が一気に脱落するおそれがなく、きわめて安全性が高いものである。
【００２０】
なお、本発明の管材よりなる支柱（１）の外方凸条（４）の先端と曲面状壁部（２）の中心との距離が、曲面状壁部（２）の円弧形横断面の半径に等しいものとなされているのは、例えば図３に示すように、脚柱（１４）の上端部に取り付けられた管材緊結装置（２０）により支柱（１）を緊締状態に結合するためである。
【００２１】
ここで、図３に示す管材緊結装置（２０）は、本出願人の提案による装置（特願２０００−１００７１０号参照）である。
【００２２】
同図において、管材緊結装置（２０）は、アルミニウム押出形材製の固定腕部材（２１）の左端部に設けられた横断面欠円形の第１ヒンジ構成部（２３）に、アルミニウム押出形材製の可動腕部材（２２）の基部に設けられた横断面略Ｃ形の第２ヒンジ構成部（２４）が嵌め合わせられて、固定腕部材（２１）に対し可動腕部材（２２）が揺動自在に枢着され、第１ヒンジ構成部（２３）内に抜止めボルト（３４）が挿通されている。
【００２３】
可動腕部材（２２）の右端部に切欠き（２７）が設けられ、固定腕部材（２１）の右端部に切欠き（２７）に対向する長孔（２６）が設けられている。固定腕部材（２１）の長孔（２６）には、緊締ナット（３１）を具備する締付ボルト（３０）の基部が挿通され、締付ボルト基部には抜止め用割りピン（３２）が取り付けられている。
【００２４】
上記管材緊結装置（２０）の可動腕部材（２２）を開いた状態で、本発明の管材よりなる支柱（１）の高さの中間所定部分を嵌め入れる。このとき、締付ボルト（３０）は固定腕部材（２１）の右端部の長孔（２６）に沿って外方傾斜状に倒しておく。
【００２５】
つぎに、可動腕部材（２２）を閉じると、支柱（１）の高さの中間所定部分が固定腕部材（２１）と可動腕部材（２２）とによって挾まれる。この状態で、締付ボルト（３０）を起して、可動腕部材（２２）の切欠き（２７）に嵌め入れ、緊締ナット（３１）を締め付けるものである。これにより、支柱（１）の中間所定部分の曲面状壁部（２）が、固定腕部材（２１）の円弧状の管材挾持面および可動腕部材（２２）の円弧状の管材挾持面に沿わせられ、かつ支柱（１）の外方凸条（４）の先端が、可動腕部材（２２）の管材挾持面の中央部分に沿わせられる。
【００２６】
このようにして、本発明の管材よりなる支柱（１）によれば、通常の円管よりなる支柱の場合と同様に、管材緊結金具（２０）によって緊締状態に把持することができ、建築用足場（２０）における支柱（１）として、脚柱（１４）や腕木部材（図示略）との連結を簡単に行ない得るものである。
【００２７】
図４と図５は、本発明の第２実施形態を示すものである。ここで、上記第１実施形態の場合と異なる点は、支柱（１）の平坦壁部（３）に平行状に２つの外方凸条（４）が設けられている点にある。そして、各外方凸条（４）の先端と支柱（１）の曲面状壁部（２）の中心との距離が、曲面状壁部（２）の円弧形横断面の半径に等しいものとなされている。
【００２８】
この第２実施形態の管材よりなる支柱（第１管材）（１）と、円管よりなる踏桟（第２管材）（１１）とが、本発明の管材接合装置によって接合されている。
【００２９】
すなわち、まず図４ａを参照すると、支柱（１）の踏桟接合予定箇所において２つの外方凸条（４）（４）に、上下一対の切欠き（５）（５）がそれぞれ設けられている。
【００３０】
つぎに図４ｂを参照すると、支柱（１）の２つの外方凸条（４）（４）のそれぞれ一対の切欠き（５）（５）に、踏桟（１１）の端部（１１ａ）の上下壁部分が嵌め入れられて、踏桟（１１）の端部（１１ａ）が平坦壁部（３）に対して直角状に突き合わせられ、この状態で、各外方凸条（４）の両側において踏桟（１１）の端部（１１ａ）が支柱（１）の平坦壁部（３）に溶接されている。従って、この溶接の際には、踏桟端部（１１ａ）の内部に、支柱（１）の２つの外方凸条（４）（４）の部分切削により断続した２つの外方凸起（４ａ）（４ａ）が左右両側に存在しているため、溶接作業の際に左右のぶれがなく安定して溶接を行ない得るものであり、接合強度が非常に大きいものである。
【００３１】
そして、この第２実施形態の管材よりなる支柱（１）の２つの外方凸条（４）の先端と支柱（１）の曲面状壁部（２）の中心との距離が、それぞれ曲面状壁部（２）の円弧形横断面の半径に等しいものとなされているため、図５に示すように、第２実施形態の管材よりなる支柱（１）は、通常の円管よりなる支柱等と同様に、緊結金具（２０）によって緊締状態に把持することができ、建築用足場（１０）における支柱（１）として、脚柱（１４）や腕木部材（図示略）との連結を簡単に行ない得るものであり、この点は、上記第１実施形態の場合と同様である。
【００３２】
なお、上記２つの実施形態においては、踏桟（第２管材）（１１）として円管を用いているが、その他、角管を用いることもでき、また本発明による管材と同形状のものを踏桟（第２管材）（１１）として用いることもできる。
【００３３】
【発明の効果】
本発明による管材は、上述のように、横断面半円より大きい円弧形を有する曲面状壁部と、これの両側縁に連なりかつ長手方向にのびる平坦壁部と、平坦壁部に外方突出状にかつ長手方向にのびるように設けられた外方凸条とよりなる管材において、外方凸条が、平坦壁部の幅中央部に設けられており、外方凸条の先端と管材の曲面状壁部の中心との距離が、曲面状壁部の円弧形横断面の半径に等しいものとなされているものであるから、建築用足場の支柱等に用いられる管材として強度が非常に大きく、しかも踏桟等の他の管材との溶接による連結作業を容易かつ安価に行ない得る。また、本発明による管材は、溶接のための加工作業が簡単であり、溶接作業も容易であるとともに、通常の円管よりなる支柱等と同様に、緊結金具によって緊締状態に把持することができ、建築用足場における支柱として用いても、脚柱や腕木部材等との連結を簡単に行ない得るという効果を奏する。
【００３４】
また、上記管材の外方凸条が、平坦壁部に平行状に複数設けられており、各外方凸条の先端と管材の曲面状壁部の中心との距離が、曲面状壁部の円弧形横断面の半径に等しいものとなされている場合には、溶接作業の際に左右のぶれがなく安定して溶接を行ない得るため、接合強度が非常に大きくなるし、通常の円管よりなる支柱等と同様に、緊結金具によって緊締状態に把持することができ、建築用足場における支柱として用いても、脚柱や腕木部材等との連結を簡単に行ない得るという効果を奏する。
【００３５】
本発明の請求項３記載の管材接合装置は、上述のように、上記請求項１記載の管材を第１管材として用い、この第１管材に対して第２管材を直角状に接合する装置であって、第１管材の第２管材接合予定箇所において外方凸条に、第２管材端部の上下壁部分を嵌め入れる一対の切欠きが設けられており、第１管材の平坦壁部に対して第２管材の端部が直角状に突き合わせられて、第２管材端部の上下壁部分が第１管材の外方凸条の一対の切欠きに嵌め入れられた状態で、外方凸条の両側において第２管材の端部が第１管材の平坦壁部に溶接されているものであるから、溶接のための管材の加工作業が非常に簡単で、しかも溶接による接合強度が非常に大きいうえに、例え多少の溶接不備や割れ等が発生しても、第２管材の端部の内部に、第１管材の外方凸条の部分切削により断続した外方凸起が存在しているため、第２管材の端部がこの外方凸起に掛かり合い、従って第２管材が一気に脱落するおそれがなく、きわめて安全性が高いという効果を奏する。
【００３６】
また上記管材接合装置において、第１管材の外方凸条が、平坦壁部の幅中央部に設けられており、外方凸条の先端と第１管材の曲面状壁部の中心との距離が、曲面状壁部の円弧形横断面の半径に等しいものとなされている場合には、溶接のための外方凸条の切削作業が簡単であり、溶接作業も容易であるとともに、溶接による接合強度が非常に大きいという効果を奏する。
【００３７】
また上記管材接合装置において、第１管材の外方凸条が、平坦壁部に平行状に複数設けられており、各外方凸条の先端と第１管材の曲面状壁部の中心との距離が、曲面状壁部の円弧形横断面の半径に等しいものとなされ、第１管材の第２管材接合予定箇所において各外方凸条に、第２管材端部の相互に対向する上下壁部分を嵌め入れる一対の切欠きが設けられている場合には、溶接作業の際に左右のぶれがなく安定して溶接を行ない得るため、接合強度がさらに大きくなるという効果を奏する。
【図面の簡単な説明】
【図１】 第１実施形態の本発明品を支柱として用いた建築用枠組足場の部分斜視図である。
【図２】 第１実施形態の本発明品よりなる支柱に、踏桟を接合する状態を示す要部拡大斜視図で、図２ａは踏桟接合前の状態を、図２ｂは踏桟接合後の状態を示している。
【図３】 第１実施形態の本発明品よりなる支柱が緊結装置により緊締状態に把持されている状態の拡大断面図である。
【図４】 第２実施形態の本発明品よりなる支柱に、踏桟を接合する状態を示す要部拡大斜視図で、図４ａは踏桟接合前の状態を、図４ｂは踏桟接合後の状態を示している。
【図５】 第２実施形態の本発明品よりなる支柱が緊結装置により緊締状態に把持されている状態の拡大断面図である。
【符号の説明】
１ 第１管材（支柱）
２ 曲面状壁部
３ 平坦壁部
４ 外方凸条
４ａ 外方凸起
５ 切欠き
１１ 第２管材（踏桟）
１１ａ 端部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe material used for a building scaffold or the like and a pipe material joining apparatus using the same.
[0002]
[Prior art]
Conventionally, a circular pipe is often used as a pipe material constituting a column of a scaffold for a building or a crosspiece (horizontal crosspiece). In order to connect a stepped bar made of a circular pipe with a diameter smaller than that of the column to the required height of the column made of a circular tube by welding, the outer diameter of the stepped beam is almost the same as the outer diameter of the stepped beam. A through hole with a thickness is opened, and the tip of the step rail is inserted into the through hole of the column, and the portion near the tip of the step column and the column wall portion around the through hole are welded over the entire circumference of the step column. It was.
[0003]
[Problems to be solved by the invention]
However, according to such a conventional method, it is very troublesome and troublesome to make a through hole of a predetermined size in a curved side wall at a place where a pillar made of a circular pipe is planned to be joined. was there. In addition, when a through hole is formed in the curved side wall of the support, there is a problem that the strength of the support is lowered accordingly.
[0004]
The object of the present invention is to solve the above-mentioned problems of the prior art, and has a very high strength as a pipe material used for a pillar of a building scaffold, etc. A pipe having a novel shape that can be performed at low cost, and a device that uses the pipe as a first pipe such as a support and joins a second pipe such as a walk rail to the first pipe at a right angle. In addition, the processing of the pipe material for welding is very easy, and the joint strength by welding is very large. Moreover, even if some welding defects or cracks occur, the second pipe material such as a foot cross It is an object of the present invention to provide an extremely safe pipe material joining apparatus that does not cause a risk of falling off at once.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a pipe according to
In addition, a plurality of outward ridges of the pipe material may be provided in parallel to the flat wall portion, and the distance between the tip of each outer ridge and the center of the curved wall portion of the tube material is the curved wall portion. Is equal to the radius of the arc-shaped cross section. In this case, it is preferable to provide two outward ridges in parallel with each other at a width of 1/3 from both side edge portions of the flat wall portion.
[0006]
According to a third aspect of the present invention, there is provided a pipe material joining apparatus, wherein the pipe material according to the first aspect is used as a first pipe material, and a second pipe material is joined to the first pipe material at a right angle. A pair of notches into which the upper and lower wall portions of the second pipe material end are fitted are provided on the outer ridge at the second pipe material joint planned portion, and the second pipe material is provided to the flat wall portion of the first pipe material. Second ends are formed on both sides of the outer ridge in a state where the ends are butted at right angles and the upper and lower wall portions of the second tube end are fitted into the pair of notches of the outer ridge of the first tube. The end of the tube material is welded to the flat wall portion of the first tube material.
[0007]
In the above-described pipe joining device, the outward ridge of the first pipe is provided at the center of the width of the flat wall, and the distance between the tip of the outward ridge and the center of the curved wall of the first pipe is The radius is equal to the radius of the arc-shaped cross section of the curved wall portion.
[0008]
Further, in the above pipe material joining apparatus, there may be a case where a plurality of outward ridges of the first tube material are provided in parallel to the flat wall portion, and the tip of each outer ridge and the center of the curved wall portion of the first tube material. Is equal to the radius of the arc-shaped cross section of the curved wall portion, and is opposed to each of the outward protruding ridges at the second tubular material joining portion of the first tubular material. A pair of notches into which the upper and lower wall portions to be fitted are fitted is provided.
[0009]
In the pipe joining apparatus, a circular pipe or a square pipe is usually used as the second pipe, but the pipe according to the first aspect of the present invention can also be used as the second pipe.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0011]
In this specification, front and rear, left and right are based on FIG. 3, front is the right side of FIG. 3, rear is the same left side, left is the lower side of the figure, and right is the upper side. And
[0012]
1 to 3 show that the pipe material of the present invention is applied to a column (1) of a building framework scaffold (10), and that the pipe material joining apparatus of the present invention is a column (1) and a tram (horizontal beam) ( 11 shows a first embodiment applied to the connection of 11).
[0013]
First, referring to FIG. 1, a building framework scaffold (10) is provided between a column (1) made of the pipe material of the present invention and a pair of front and rear columns (1) and (1). A large number of struts (11), a scaffold plate (12) arranged horizontally at the required height of the scaffold (10), and a large number of braces that connect the crosswalks (11) of different heights (13).
[0014]
Next, as shown in FIG. 2, the column (1) made of the pipe material of the present invention is made of extruded aluminum (including aluminum alloy) and has a curved surface shape having an arc shape larger than a semicircular cross section. A wall (2), a flat wall (3) that continues to both sides of the wall and extends in the longitudinal direction, and is provided to project outward and extend in the longitudinal direction at the center of the width of the flat wall (3). The distance between the tip of the outer ridge (4) and the center of the curved wall (2) is the arc-shaped cross section of the curved wall (2). It is supposed to be equal to the radius of.
[0015]
The strut (first pipe member) (1) made of the pipe material of the present invention and the crosspiece (second pipe member) (11) made of a circular pipe are joined by the pipe material joining device of the present invention.
[0016]
That is, referring first to FIG. 2a, a pair of cuts for fitting the upper and lower wall portions of the end portion (11a) of the step rail (11) to the outward projecting ridge (4) at the place where the step rail is to be joined to the support column (1). Notches (5) and (5) are provided.
[0017]
Next, referring to FIG. 2b, the upper and lower wall portions of the end portion (11a) of the step rail (11) are fitted into the pair of notches (5) and (5) of the outward projection (4) of the support column (1). Then, the end (11a) of the step rail (11) is abutted at right angles to the flat wall portion (3), and in this state, the step rail (11) on both sides of the outer ridge (4). The end (11a) is welded to the flat wall (3) of the support (1).
[0018]
According to the support column (1) made of the pipe material of the present invention, the outward protrusion (4) is provided at the center of the width of the flat wall (3), so that the cutting process for welding is simple. The connection work by welding with the step rail (11) can be performed easily and inexpensively, and the joining strength by welding is very high.
[0019]
Further, when welding the end portion (11a) of the step rail (11), even if some welding defects or cracks occur, the outside of the column (1) is placed inside the end portion of the step rail (11a). Since there is an outward protrusion (4a) that is interrupted by partial cutting of the ridge (4), the end (11a) of the traverse (11) is connected to the outward protrusion (4a) and the end of the traverse It is engaged with the upper end portion of the outer ridge (4) on the lower side of the portion (11a), and therefore, there is no possibility that the traversing rail (11) will drop off at a stretch, and the safety is extremely high.
[0020]
In addition, the distance between the tip of the outward ridge (4) of the column (1) made of the pipe material of the present invention and the center of the curved wall (2) is the arc-shaped cross section of the curved wall (2). For example, as shown in FIG. 3, for example, as shown in FIG. 3, the pipe material fastening device (20) attached to the upper end of the pedestal (14) is connected to the support column (1) in a tightened state. It is.
[0021]
Here, the pipe material fastening device (20) shown in FIG. 3 is a device proposed by the present applicant (see Japanese Patent Application No. 2000-1000071).
[0022]
In the same figure, the pipe material binding device (20) is formed of an aluminum extruded profile on a first hinge component (23) having a circular cross section provided at the left end of a fixed arm member (21) made of extruded aluminum. A second hinge component (24) having a substantially C-shaped cross section provided at the base of the movable arm member (22) made of metal is fitted into the movable arm member (22) so that the movable arm member (22) swings relative to the fixed arm member (21). It is pivotally mounted and a retaining bolt (34) is inserted into the first hinge component (23).
[0023]
A cutout (27) is provided at the right end of the movable arm member (22), and a long hole (26) facing the cutout (27) is provided at the right end of the fixed arm member (21). The base of the tightening bolt (30) having the tightening nut (31) is inserted into the long hole (26) of the fixed arm member (21), and the retaining split pin (32) is inserted into the tightening bolt base. It is attached.
[0024]
With the movable arm member (22) of the tube material fastening device (20) opened, a predetermined intermediate portion of the height of the column (1) made of the tube material of the present invention is fitted. At this time, the tightening bolt (30) is tilted outwardly along the elongated hole (26) at the right end of the fixed arm member (21).
[0025]
Next, when the movable arm member (22) is closed, an intermediate predetermined portion of the height of the column (1) is pinched by the fixed arm member (21) and the movable arm member (22). In this state, the tightening bolt (30) is raised and fitted into the notch (27) of the movable arm member (22), and the tightening nut (31) is tightened. Thus, the curved wall portion (2) of the intermediate predetermined portion of the support column (1) follows the arcuate tube holding surface of the fixed arm member (21) and the arcuate tube holding surface of the movable arm member (22). The tip of the outer ridge (4) of the column (1) is fitted along the central portion of the tube holding surface of the movable arm member (22).
[0026]
Thus, according to the support column (1) made of the pipe material of the present invention, as in the case of the support column made of a normal circular pipe, it can be held in the tightened state by the tube material fastening fitting (20). The support (1) in the scaffold (20) can be easily connected to the pedestal (14) and the brace member (not shown).
[0027]
4 and 5 show a second embodiment of the present invention. Here, the difference from the case of the first embodiment is that two outward ridges (4) are provided in parallel to the flat wall portion (3) of the support column (1). And the distance between the tip of each outward ridge (4) and the center of the curved wall (2) of the support column (1) is equal to the radius of the arc-shaped cross section of the curved wall (2) It has been.
[0028]
The support column (first tube material) (1) made of the pipe material of the second embodiment and the treadle (second tube material) (11) made of a circular pipe are joined together by the pipe material joining device of the present invention.
[0029]
That is, referring first to FIG. 4a, a pair of upper and lower notches (5) and (5) are respectively provided on the two outward projecting ridges (4) and (4) at the place where the struts (1) are to be joined. Yes.
[0030]
Next, referring to FIG. 4b, the pair of notches (5) and (5) of the two outward ridges (4) and (4) of the support column (1) are respectively connected to the end portions (11a) of the traverse (11). The end (11a) of the crosspiece (11) is butted perpendicularly to the flat wall (3), and in this state, the outer ridges (4) On both sides, the end portion (11a) of the step rail (11) is welded to the flat wall portion (3) of the column (1). Therefore, at the time of this welding, two outward projections (intermittently interrupted by partial cutting of the two outward projections (4) and (4) of the column (1) inside the end of the traverse end (11a) ( 4a) and (4a) are present on both the left and right sides, so that there is no left / right shake during the welding operation and welding can be performed stably, and the bonding strength is very high.
[0031]
And the distance between the tip of the two outward ridges (4) of the column (1) made of the tube material of the second embodiment and the center of the curved wall (2) of the column (1) is curved. Since it is equal to the radius of the arc-shaped cross section of the wall portion (2), as shown in FIG. 5, the column (1) made of the tube material of the second embodiment is a column made of a normal circular tube. In the same manner as above, it can be held tightly by the fastening bracket (20), and can be easily connected to the pedestal (14) and the brace member (not shown) as the column (1) in the building scaffold (10). This point is the same as in the case of the first embodiment.
[0032]
In the above two embodiments, a circular pipe is used as the crosspiece (second pipe material) (11). However, a square pipe can also be used, and the same shape as the pipe material according to the present invention. It can also be used as a pedestal (second pipe) (11).
[0033]
【The invention's effect】
As described above, the tubular material according to the present invention includes a curved wall portion having an arc shape larger than a semicircular cross section, a flat wall portion extending in the longitudinal direction and connected to both side edges of the curved wall portion, and outwardly extending to the flat wall portion. In the tubular material composed of an outward ridge provided in a protruding shape and extending in the longitudinal direction , the outward ridge is provided in the center of the width of the flat wall portion, and the tip of the outward ridge and the tube material. Because the distance from the center of the curved wall is equal to the radius of the arc-shaped cross section of the curved wall , the strength is very strong as a pipe material used for the scaffolding of building scaffolds, etc. In addition, it is possible to easily and inexpensively perform a connecting operation by welding with other pipe materials such as a step rail . Further, the pipe according to the present invention is easy to work for welding, and can be easily welded, and can be held in a tightened state by a tightening fitting, like a column made of a normal circular pipe. Even if it is used as a support in a building scaffold, there is an effect that it can be easily connected to a pedestal or a brace member.
[0034]
In addition, a plurality of outward ridges of the pipe material are provided in parallel to the flat wall portion, and the distance between the tip of each outer ridge and the center of the curved wall portion of the tube material is the same as that of the curved wall portion. If the radius is equal to the radius of the arc-shaped cross section, there will be no left / right blurring during welding work, and welding can be performed stably. Similar to the supporting pillars and the like, it can be held in a tightened state by the fastening metal fittings, and even when used as a supporting pillar in a building scaffold, there is an effect that it can be easily connected to a pedestal or arm member.
[0035]
The pipe material joining apparatus according to
[0036]
Moreover, in the said pipe material joining apparatus, the outward ridge of the 1st pipe material is provided in the width | variety center part of the flat wall part, and the distance of the front-end | tip of an outward ridge and the center of the curved-shaped wall part of a 1st pipe material However, when the radius is equal to the radius of the arc-shaped cross section of the curved wall, the cutting work of the outer ridges for welding is easy, the welding work is easy, and welding There is an effect that the bonding strength by is very large.
[0037]
Further, in the above pipe material joining apparatus, a plurality of outward ridges of the first pipe material are provided in parallel to the flat wall portion, and the tip of each outward ridge and the center of the curved wall portion of the first tube material. The distance is equal to the radius of the arc-shaped cross section of the curved wall portion, and the upper and lower surfaces of the second tubular material end portions facing each other at the respective outer convex stripes at the second tubular material joining planned portion of the first tubular material. When a pair of notches into which the wall portion is fitted is provided, there is no left / right blurring during the welding operation, and welding can be performed stably, so that the joint strength is further increased.
[Brief description of the drawings]
FIG. 1 is a partial perspective view of a building framework scaffold using the product of the first embodiment as a support column.
FIG. 2 is an enlarged perspective view of a main part showing a state in which a footrail is joined to a support post made of the product of the first embodiment, FIG. 2a is a state before joining the footrail, and FIG. Shows the state.
FIG. 3 is an enlarged cross-sectional view of a state in which a support post made of the product of the first embodiment is held in a tightened state by a tightening device.
FIGS. 4A and 4B are enlarged perspective views of main parts showing a state in which a crosspiece is joined to a support made of the product of the second embodiment of the present invention, FIG. 4A shows a state before joining the crosspiece, and FIG. Shows the state.
FIG. 5 is an enlarged cross-sectional view of a state in which a support post made of the product of the second embodiment is held in a tightened state by a tightening device.
[Explanation of symbols]
1 First pipe material (support)
2
11a end
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000113317A JP4206493B2 (en) | 2000-04-14 | 2000-04-14 | Tubing material and tubular material joining apparatus using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000113317A JP4206493B2 (en) | 2000-04-14 | 2000-04-14 | Tubing material and tubular material joining apparatus using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001295467A JP2001295467A (en) | 2001-10-26 |
| JP4206493B2 true JP4206493B2 (en) | 2009-01-14 |
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| JP2000113317A Expired - Fee Related JP4206493B2 (en) | 2000-04-14 | 2000-04-14 | Tubing material and tubular material joining apparatus using the same |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5237883B2 (en) * | 2009-05-15 | 2013-07-17 | 日鐵住金建材株式会社 | Frame scaffolding and frame scaffolding |
| JP5545095B2 (en) * | 2010-07-26 | 2014-07-09 | トヨタ紡織株式会社 | Vehicle seat frame |
| JP6667835B2 (en) * | 2018-04-25 | 2020-03-18 | 雅仁 木下 | Scaffolding support |
| CN110792253A (en) * | 2019-12-03 | 2020-02-14 | 张延年 | Steel pipe fastener capable of adjusting connection of fastening pieces |
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| JP2001295467A (en) | 2001-10-26 |
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