JP3850280B2

JP3850280B2 - Metal fittings for reinforcing bars and separators

Info

Publication number: JP3850280B2
Application number: JP2001374567A
Authority: JP
Inventors: 徳夫米谷
Original assignee: 株式会社国元商会
Priority date: 2001-12-07
Filing date: 2001-12-07
Publication date: 2006-11-29
Anticipated expiration: 2021-12-07
Also published as: JP2003172027A

Description

【０００１】
【発明の属する技術分野】
本発明は、鉄筋コンクリート造りの構造物を築造する為のコンクリート型枠を組み立てる際に、型枠板を位置決めするセパレーターを鉄筋に結合させる為に使用する連結金具に関するものである。
【０００２】
【従来の技術】
従来、型枠板を位置決めするセパレーターを鉄筋に結合させる場合、所要長さのセパレーターの一端を現場で鉄筋に直接溶接していたので、溶接時の鉄筋の加熱により鉄筋が焼き鈍しを受けたようになって強度が低下する重大な問題点があるだけでなく、溶接したセパレーターの向きが不適合なために当該セパレーターの向きを調整しなければならなくなったとき、セパレーターを曲げる等の作業が必要になり、非常に手間取るだけでなく、セパレーターの位置や向きを精度良く決定することが困難であった。
【０００３】
【課題を解決するための手段】
本発明は上記のような従来の問題点を解消し得る鉄筋とセパレーターとの連結金具を提供することを目的とするものであって、その手段を後述する実施形態の参照符号を付して示すと、本体１、ボルト２、及び回転軸３から成り、本体１は、貫通ネジ孔４を有する上部５、当該上部５の一端から略直角に連設された側部６、及び当該側部６の遊端から前記上部５のある側に連設され且つ前記上部５に対向する側が凹入したＶ字形鉄筋受け部７とを備え、ボルト２は、前記本体上部５の貫通ネジ孔４を螺合貫通した状態で先端押圧部２ａが前記鉄筋受け部７に嵌合する鉄筋８を押圧固定し、回転軸３は、その軸心３ａが前記本体１の表面に対し直角向きで且つ当該軸心３ａの周りに自転可能に前記本体１に支持されたもので、前記本体１の外側に突出する外端側にセパレーター１９の溶接用座２０が設けられている鉄筋とセパレーターとの連結金具であって、前記本体１が、その上部５からＶ字形鉄筋受け部７まで連続し且つ外側に突出する偏平突曲リブ９を備え、前記回転軸３は、前記偏平突曲リブ９に設けられた貫通孔１３を貫通すると共に外端に前記セパレーター溶接用座２０が設けられている軸部１１と、この軸部１１の内端側で前記偏平突曲リブ９の内側溝部９ａに遊嵌するように設けられた鍔部１４とを備えた構成となっている。
【０００４】
上記構成の本発明を実施するについて、前記回転軸３には、前記本体１の外側に前記セパレーター溶接用座２０を形成する大径鍔部１２と、この大径鍔部１２と前記本体１の表面との間に放熱用隙間１５を形成するための段部１６とを設けることが出来る。
【０００５】
又、前記回転軸３は、前記本体１の側部６に取り付けることも出来るが、前記本体１のＶ字形鉄筋受け部７に於ける両斜辺部７ａ，７ｂの内、本体側部６に近い側の斜辺部７ａに取り付けるのが望ましい。この場合、前記本体１の側部６には、周囲に外側に突出する短筒状壁部１８を備えた開口１７を設けることが出来る。
【０００７】
又、前記回転軸３の軸部１１の内端側の鍔部２１が、Ｖ字形鉄筋受け部７に嵌合する鉄筋８と当接するように構成することが出来る。
【０００８】
前記回転軸のセパレーター溶接用座２０は、単なる平坦面から構成することが出来るが、セパレーター１９が嵌合する凹溝２２や、セパレーター１９が貫通する貫通孔２４等から構成することも出来る。
【０００９】
【発明の実施の形態】
以下に本発明の好適実施形態を添付図に基づいて説明すると、図１〜図３に於いて、１は本体、２はボルト、３は回転軸である。本体１は、貫通ネジ孔４を有する上部５、当該上部５の一端から略直角に連設された側部６、及び当該側部６の遊端から前記上部５のある側に連設され且つ前記上部５に対向する側が凹入したＶ字形鉄筋受け部７とを備え、ボルト２は、前記本体上部５の貫通ネジ孔４を螺合貫通するもので、先端押圧部２ａが前記Ｖ字形鉄筋受け部７に嵌合する鉄筋８を押圧固定する。
【００１０】
前記本体１には、その上部５からＶ字形鉄筋受け部７まで連続し且つ外側に突出する偏平突曲リブ９が形成され、前記貫通ネジ孔４は、本体上部５の偏平突曲リブ９から内向きに一体形成された短筒状部１０に内側にネジ溝を加工して構成されているが、本体１を構成する金属板の厚さによっては単にネジ孔を加工するだけでも良いし、本体上部５に設けた貫通孔と同心状にナットを溶接して構成することも出来る。
【００１１】
前記回転軸３は、有底筒状の軸部１１と外端（底側）の大径鍔部１２とを備えたもので、本体１のＶ字形鉄筋受け部７で本体側部６に隣接する側の斜辺部７ａに設けられた貫通孔１３に前記軸部１１が外から内向きに挿通され、偏平突曲リブ９の内側溝部９ａ内に突出する前記軸部１１の内端を加圧拡径して形成された抜け止め用鍔部１４によって、本体１から外れ落ちないようになっている。尚、前記抜け止め用鍔部１４は、偏平突曲リブ９の内側溝部９ａ内に全体が納まるサイズで、当該内側溝部９ａ内に回転自在に遊嵌している。又、軸部１１と大径鍔部１２との間の入り隅部には、当該大径鍔部１２と本体１の表面（Ｖ字形鉄筋受け部７の表面）との間に放熱用隙間１５を形成させる段部１６が形成されている。
【００１２】
本体１の側部６には、その偏平突曲リブ９の内側溝部９ａ内と本体１の外側とを連通させる開口１７が設けられている。この開口１７は、この本体１が鉄筋８に取り付けられた状態でコンクリートが打設されるとき、本体１の内側に空気が取り込まれて空間として残るのを防止するエアー抜きとして働く。又、図示のように、当該開口１７の周囲に外側に突出する短筒状壁部１８を形成しておくことにより、本体側部６の表面にセパレーターを溶接するのに利用出来る平坦な面が少なくなるので、当該本体側部６の表面にセパレーターが不測に溶接されるのを防止することが出来る。
【００１３】
上記構成の連結金具の使用方法を説明すると、既に所定位置に配置済みの鉄筋の内、適当位置にある鉄筋８に本体１を、そのＶ字形鉄筋受け部７の内側、即ち、その両斜辺部７ａ，７ｂに当該鉄筋８が当接するように嵌合させると共にボルト２を締め付け、当該ボルト２の先端押圧部２ａとＶ字形鉄筋受け部７との間で当該鉄筋８を挟み付けることにより、本体１を鉄筋８に固定する。そして所要長さのセパレーター１９の一端部周面を前記回転軸３の大径鍔部１２の表面で構成されるセパレーター溶接用座２０に当接させて両者を互いに溶接して、当該セパレーター１９を本体１に連結する。
【００１４】
上記作業により、セパレーター１９の一端が鉄筋８の所定位置に連結されたことになるが、このとき当該セパレーター１９は、回転軸３と一体に当該回転軸３の軸心３ａの周りに回転させることが出来るので、当該セパレーター１９を所要の向きに調整した状態で、従前通りの方法で当該セパレーター１９の他端部にコンクリート型枠板等を取り付ければ良い。又、前記ボルト２を弛めることにより、本体１と共にセパレーター１５の位置を鉄筋８の長さ方向に調整することも出来るし、鉄筋８の周方向にセパレーター１９を回して当該セパレーター１９の向きを変更することも出来る。
【００１５】
上記のようにセパレーター１９を回転軸３の外端側のセパレーター溶接用座２０に溶接するとき、当該回転軸３が高温に加熱されるが、最も高温になる大径鍔部１２と本体１との間には放熱用隙間１５が形成されており、軸部１１と本体１の貫通孔１３の内周面との間にも微小ではあるが空隙があるので、本体１に直にセパレーター１９を溶接する場合と比較して、本体１の温度上昇は大巾に抑えられる。この場合、図１に示すように、抜け止め用鍔部１４を本体１の内側面に密着させるように形成するのではなく、斜めに立ち上がるように形成して当該抜け止め用鍔部１４と本体１の内側面との間に隙間を確保することが望ましい。
【００１６】
図４に示す実施形態では、回転軸３には、セパレーター溶接用座２０を形成するための大径鍔部１２が設けられておらず、回転軸３の軸部１１の平坦な外端面がそのままセパレーター溶接用座２０を形成している。又、当該軸部１１の内端側には、前記偏平突曲リブ９の内側溝部９ａに遊嵌する鍔部として、大径フランジ状の鍔部２１（以下、大径フランジ部２１という）が設けられ、この大径フランジ部２１がＶ字形鉄筋受け部７に嵌合固定される鉄筋８と当接するように構成している。従って、ボルト２によってＶ字形鉄筋受け部７に鉄筋８を固定したとき、当該鉄筋８とＶ字形鉄筋受け部７との間で前記大径フランジ部２１が挟み付けられて固定され、回転軸３が本体１に回転不能に固定されるので、当該回転軸３の外端のセパレーター溶接用座２０に溶接されたセパレーター１９の向きが固定される。
【００１７】
図５に示す実施形態では、回転軸３の外端のセパレーター溶接用座２０が、セパレーター１９が嵌合する凹溝２２によって構成されている。従って、回転軸３の外端のセパレーター溶接用座２０にセパレーター１９を溶接するとき、前記凹溝２２にセパレーター１９の一端を嵌合させて位置決めすることが出来る。
【００１８】
図４及び図５に示す実施形態では、回転軸３が本体１の内側に脱落するのを防止する手段を示していないが、このような構成であっても、回転軸３が本体１の外側に脱落することは大径フランジ部２１で防止することが出来、使用状態では鉄筋８によって回転軸３が本体１の内側へ脱落することはないのであるから、実用上問題はない。勿論、この図４及び図５に示す実施形態の回転軸３の軸部１１の本体１から外側に突出する部分に、抜け止め用ピンを直径方向に通したり、抜け止め用ビスを装着したり、周面の一部をかしめて突出させて抜け止めとする等の手段を講ずることも出来る。
【００１９】
図６に示す実施形態では、回転軸３の本体１から外側に突出する大径軸部２３にセパレーター１９が貫通する貫通孔２４を直径方向に設け、この貫通孔２４をセパレーター溶接用座２０としている。この貫通孔２４から成るセパレーター溶接用座２０では、貫通孔２４に挿通されたセパレーター１９と回転軸３とを、貫通孔２４の両端又は一端開口周縁部で溶接することになる。
【００２０】
又、図６に示す実施形態では、回転軸３の軸部１１と本体１の貫通孔１３との間に、両端を貫通孔１３の外側に延出させる状態で断熱用シート２５を介在させて、回転軸３側から本体１側への溶接熱の伝達を一層抑制出来るように構成している。このような断熱用シート２５を利用する他、軸部１１の外周面又は貫通孔１３の内周面の何れか一方に凹凸加工を施す等して、回転軸３側から本体１側への熱伝導性を低下させることも出来る。
【００２１】
尚、図１〜３に示す実施形態、図４に示す実施形態、図５に示す実施形態、及び図６に示す実施形態に於ける回転軸３の構成やセパレーター溶接用座２０の構成、或いは断熱構成を互いに組み合わせて、別の実施形態を構成することも出来る。又、回転軸３は、本体１のＶ字形鉄筋受け部７の両斜辺部７ａ，７ｂの内、本体側部６から遠い側の斜辺部７ｂに取り付けることも出来るし、本体１の側部６に取り付けることも出来る。
【００２２】
【発明の効果】
本発明の鉄筋とセパレーターとの連結金具は以上のように実施し且つ使用することができるものであって、係る本発明の連結金具によれば、本体を、そのＶ字形鉄筋受け部とボルトとを利用して鉄筋の長さ方向任意の位置に固定し、当該本体に支持されている回転軸のセパレーター溶接用座に所要長さのセパレーターの一端部を溶接することにより、鉄筋に直接セパレーターを溶接することなく当該鉄筋にセパレーターを連結することが出来る。従って、セパレーターを鉄筋に溶接することによる当該鉄筋の強度低下を防止出来る。しかも、本体表面にセパレーターを直に溶接するのではなく、本体に対して回転自在に支持されている回転軸に溶接するのであるから、溶接熱による本体強度に及ぼす悪影響が小さくなる。更に、溶接される当該セパレーターの位置や向きは、鉄筋長さ方向の本体固定位置の調整、鉄筋軸心周りの本体固定向きの調整、及び本体に対する回転軸の回転等を組み合わせて自由に変更決定することが出来る。従って、取り付け後のセパレーターの位置や向きの変更を含めて、鉄筋に対するセパレーターの取付作業を、極めて簡単容易且つ能率的に、しかも非常に精度良く行える。又、本発明の構成によれば、回転軸が本体から脱落することがなく、取り扱いが容易になるばかりでなく、セパレーター溶接用座として広い面を確保出来、セパレーターの溶接作業も容易に行える。
【００２３】
尚、請求項２に記載の構成によれば、セパレーター溶接時に最も高温となる回転軸の外端大径鍔部から本体への溶接熱の伝達が、当該大径鍔部と前記本体の表面との間の放熱用隙間によって抑制され、本体が加熱されることによる焼き鈍し効果に起因する強度低下を抑制出来る。
【００２４】
又、請求項３に記載の構成によれば、溶接されたセパレーターが如何なる方向に向こうが、本体を鉄筋に固定するボルトからは離れることになるので、当該ボルトの操作が容易に行える。この場合、請求項４に記載の構成によれば、回転軸が取り付けられていない本体の側部にはセパレーターの直溶接に利用出来るような平坦な表面が残ることになり、作業者が回転軸のセパレーター溶接用座にセパレーターを溶接しないで前記本体の側部にセパレーターを溶接してしまう恐れがあるが、請求項４に記載の構成によれば、本体側部には周囲に短筒状壁部を備えた開口が設けられているので、この短筒状壁部によって本体側部の表面にセパレーターが直溶接されることを防止することが出来る。従って、本体表面にセパレーターが直溶接されることによる不都合、即ち、溶接熱を本体が直に受けることによる本体強度の著しい低下を防止出来る。
【００２６】
更に、請求項５に記載の構成によれば、セパレーターが溶接された回転軸を最終的には本体、延いては鉄筋に対して固定して、セパレーターの向きを一定に保持させることが出来るので、当該セパレーターに対するコンクリート型枠等の結合作業を容易に行える。
【００２７】
又、回転軸のセパレーター溶接用座を請求項６に記載のように平坦面から構成するときは、回転軸の構造がシンプルになり、安価に実施することが出来るが、請求項７に記載のようにセパレーターが嵌合する凹溝で構成するときは、溶接するセパレーターを簡単に所定位置に位置決めすることが出来るので、セパレーターの溶接作業を容易に行える。更に、請求項８に記載のようにセパレーターが貫通する貫通孔でセパレーター溶接用座を構成するときは、セパレーターの溶接強度が多少不十分であっても、セパレーターが不測に脱落する恐れが少なくなり、又、セパレーターに対する溶接長さも短くて済む。
【図面の簡単な説明】
【図１】Ａ図は第一実施形態の連結金具を示す縦断側面図であり、Ｂ図は使用する回転軸を示す側面図である。
【図２】同連結金具の平面図である。
【図３】同連結金具の背面図である。
【図４】第二実施形態の連結金具を示す縦断側面図である。
【図５】第三実施形態の連結金具を示す縦断側面図である。
【図６】第四実施形態の連結金具の要部を示す縦断側面図である。
【符号の説明】
１本体
２ボルト
３回転軸
４貫通ネジ孔
５本体上部
６本体側部
７Ｖ字形鉄筋受け部
７ａ，７ｂＶ字形鉄筋受け部の斜辺部
８鉄筋
９偏平突曲リブ
９ａ内側溝部
１１軸部（回転軸）
１２大径鍔部（回転軸）
１３貫通孔
１４抜け止め用鍔部（回転軸）
１５放熱用隙間
１６段部（回転軸）
１７開口
１８短筒状壁部
１９セパレーター
２０セパレーター溶接用座（回転軸）
２１大径フランジ部
２２凹溝（セパレーター溶接用座）
２３大径軸部（回転軸）
２４貫通孔（セパレーター溶接用座）
２５断熱用シート[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connecting metal fitting used to connect a separator for positioning a form plate to a reinforcing bar when assembling a concrete mold for constructing a reinforced concrete structure.
[0002]
[Prior art]
Conventionally, when joining the separator that positions the form plate to the reinforcing bar, one end of the separator of the required length was directly welded to the reinforcing bar on site, so that the reinforcing bar was annealed by heating the reinforcing bar during welding. In addition to the serious problem of reduced strength, when the orientation of the welded separator is incompatible and the orientation of the separator must be adjusted, work such as bending the separator becomes necessary. In addition to being very troublesome, it was difficult to determine the position and orientation of the separator with high accuracy.
[0003]
[Means for Solving the Problems]
An object of the present invention is to provide a connecting metal fitting between a reinforcing bar and a separator that can solve the above-described conventional problems, and the means thereof is shown with reference numerals of embodiments to be described later. And a main body 1, a bolt 2, and a rotating shaft 3. The main body 1 includes an upper part 5 having a through screw hole 4, a side part 6 that is connected substantially perpendicularly from one end of the upper part 5, and the side part 6. And a V-shaped reinforcing bar receiving portion 7 which is continuous from the free end of the upper portion 5 to the side where the upper portion 5 is provided and which is opposed to the upper portion 5, and the bolt 2 is threaded through the through screw hole 4 of the main body upper portion 5. The tip pressing portion 2a presses and fixes the reinforcing bar 8 fitted to the reinforcing bar receiving portion 7 in a state of being penetrated, and the rotary shaft 3 has its axis 3a oriented perpendicular to the surface of the main body 1 and the axis. 3a is supported by the main body 1 so as to be able to rotate around the outer side of the main body 1. A connecting fitting of the reinforcing bars and separators on the outer end side welding seat 20 of the separator 19 is provided which projects, the main body 1, continuous to and outwardly from the top 5 to the V-shaped reinforcement receiving portions 7 The rotating shaft 3 includes a projecting flat bent rib 9, and the rotating shaft 3 passes through a through hole 13 provided in the flat bent rib 9 and has a shaft portion 11 provided with the separator welding seat 20 at the outer end. And a flange portion 14 provided so as to be loosely fitted in the inner groove portion 9a of the flat protruding rib 9 on the inner end side of the shaft portion 11 .
[0004]
In carrying out the present invention having the above-described configuration, the rotary shaft 3 includes a large-diameter flange 12 that forms the separator welding seat 20 on the outside of the main body 1, and the large-diameter flange 12 and the main body 1. A step portion 16 for forming a heat radiation gap 15 can be provided between the surface and the surface.
[0005]
Further, the rotary shaft 3 can be attached to the side portion 6 of the main body 1, but is close to the main body side portion 6 among the two oblique sides 7 a and 7 b in the V-shaped reinforcing bar receiving portion 7 of the main body 1. It is desirable to attach to the oblique side portion 7a on the side. In this case, the side portion 6 of the main body 1 can be provided with an opening 17 provided with a short cylindrical wall portion 18 projecting outward.
[0007]
Further, the flange portion 21 on the inner end side of the shaft portion 11 of the rotating shaft 3 can be configured to come into contact with the reinforcing bar 8 fitted to the V-shaped reinforcing bar receiving portion 7.
[0008]
The separator welding seat 20 of the rotating shaft can be constituted by a simple flat surface, but can also be constituted by a concave groove 22 into which the separator 19 is fitted, a through hole 24 through which the separator 19 penetrates, or the like.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 to 3, 1 is a main body, 2 is a bolt, and 3 is a rotating shaft. The main body 1 is connected to the upper part 5 having the through screw hole 4, the side part 6 connected substantially perpendicularly from one end of the upper part 5, and the free end of the side part 6 to the side where the upper part 5 is located, and A bolt-shaped reinforcing bar receiving portion 7 which is recessed on the side facing the upper portion 5; the bolt 2 is threaded through the through screw hole 4 of the upper portion 5 of the main body; and the tip pressing portion 2a is the V-shaped reinforcing bar. The reinforcing bar 8 fitted to the receiving part 7 is pressed and fixed.
[0010]
The main body 1 is formed with a flat protruding rib 9 that continues from the upper portion 5 to the V-shaped reinforcing bar receiving portion 7 and protrudes outward, and the through screw hole 4 extends from the flat protruding rib 9 of the main body upper portion 5. The short cylindrical portion 10 integrally formed inward is formed by processing a screw groove on the inner side, but depending on the thickness of the metal plate constituting the main body 1, the screw hole may be simply processed, It can also be configured by welding a nut concentrically with the through hole provided in the upper part 5 of the main body.
[0011]
The rotating shaft 3 includes a bottomed cylindrical shaft portion 11 and a large-diameter flange portion 12 on the outer end (bottom side), and is adjacent to the main body side portion 6 at the V-shaped reinforcing bar receiving portion 7 of the main body 1. The shaft portion 11 is inserted inward from the outside through a through hole 13 provided in the oblique side portion 7a on the side to be pressed, and the inner end of the shaft portion 11 protruding into the inner groove portion 9a of the flat protruding rib 9 is pressurized. The retaining collar 14 formed by expanding the diameter prevents it from coming off from the main body 1. The retaining collar 14 has a size that fits entirely in the inner groove 9a of the flat bent rib 9, and is freely loosely fitted in the inner groove 9a. Further, at a corner between the shaft portion 11 and the large-diameter flange portion 12, a heat dissipation gap 15 is provided between the large-diameter flange portion 12 and the surface of the main body 1 (the surface of the V-shaped reinforcing bar receiving portion 7). A step 16 is formed to form
[0012]
The side portion 6 of the main body 1 is provided with an opening 17 that allows communication between the inside groove 9 a of the flat bent rib 9 and the outside of the main body 1. The opening 17 serves as an air vent that prevents air from being taken into the inside of the main body 1 and remaining as a space when concrete is placed with the main body 1 attached to the reinforcing bar 8. Further, as shown in the figure, by forming a short cylindrical wall portion 18 protruding outward around the opening 17, a flat surface that can be used for welding the separator to the surface of the main body side portion 6 is obtained. Therefore, it is possible to prevent the separator from being unexpectedly welded to the surface of the main body side portion 6.
[0013]
The method of using the connection fitting having the above-described configuration will be described. Of the reinforcing bars already arranged at predetermined positions, the main body 1 is placed on the reinforcing bar 8 at an appropriate position, inside the V-shaped reinforcing bar receiving portion 7, that is, both oblique sides thereof. 7a and 7b are fitted so that the rebar 8 comes into contact with each other, the bolt 2 is tightened, and the rebar 8 is sandwiched between the tip pressing portion 2a of the bolt 2 and the V-shaped rebar receiving portion 7, thereby 1 is fixed to the reinforcing bar 8. Then, the peripheral surface of one end portion of the separator 19 having a required length is brought into contact with the separator welding seat 20 formed by the surface of the large-diameter flange portion 12 of the rotating shaft 3 and both are welded to each other. Connect to the body 1.
[0014]
As a result of the above operation, one end of the separator 19 is connected to a predetermined position of the reinforcing bar 8. At this time, the separator 19 is rotated around the axis 3 a of the rotating shaft 3 together with the rotating shaft 3. Therefore, a concrete form plate or the like may be attached to the other end portion of the separator 19 in a conventional manner with the separator 19 adjusted to a required direction. Also, by loosening the bolt 2, the position of the separator 15 together with the main body 1 can be adjusted in the length direction of the reinforcing bar 8, and the direction of the separator 19 is changed by turning the separator 19 in the circumferential direction of the reinforcing bar 8. You can also
[0015]
When the separator 19 is welded to the separator welding seat 20 on the outer end side of the rotary shaft 3 as described above, the rotary shaft 3 is heated to a high temperature. A space 15 for heat dissipation is formed between the shaft portion 11 and the inner peripheral surface of the through hole 13 of the main body 1. Compared with the case of welding, the temperature rise of the main body 1 is greatly suppressed. In this case, as shown in FIG. 1, the retaining collar 14 is not formed so as to be in close contact with the inner surface of the main body 1, but is formed so as to stand up obliquely, and the retaining collar 14 and the body It is desirable to ensure a gap between the inner surface of the first member.
[0016]
In the embodiment shown in FIG. 4, the rotary shaft 3 is not provided with the large-diameter flange portion 12 for forming the separator welding seat 20, and the flat outer end surface of the shaft portion 11 of the rotary shaft 3 remains as it is. A separator welding seat 20 is formed. Further, on the inner end side of the shaft portion 11 , a large-diameter flange-shaped flange portion 21 (hereinafter referred to as a large-diameter flange portion 21) is used as a flange portion that is loosely fitted in the inner groove portion 9 a of the flat protruding rib 9. The large-diameter flange portion 21 is provided so as to come into contact with the reinforcing bar 8 fitted and fixed to the V-shaped reinforcing bar receiving portion 7. Therefore, when the reinforcing bar 8 is fixed to the V-shaped reinforcing bar receiving part 7 with the bolt 2, the large-diameter flange part 21 is sandwiched and fixed between the reinforcing bar 8 and the V-shaped reinforcing bar receiving part 7. Is fixed to the main body 1 in a non-rotatable manner, so that the orientation of the separator 19 welded to the separator welding seat 20 at the outer end of the rotary shaft 3 is fixed.
[0017]
In the embodiment shown in FIG. 5, the separator welding seat 20 at the outer end of the rotating shaft 3 is constituted by a concave groove 22 into which the separator 19 is fitted. Therefore, when the separator 19 is welded to the separator welding seat 20 at the outer end of the rotating shaft 3, one end of the separator 19 can be fitted into the concave groove 22 and positioned.
[0018]
In the embodiment shown in FIGS. 4 and 5, no means for preventing the rotary shaft 3 from falling off inside the main body 1 is shown. However, even in such a configuration, the rotary shaft 3 is outside the main body 1. Can be prevented by the large-diameter flange portion 21, and in use, the rotating shaft 3 is not dropped into the inside of the main body 1 by the reinforcing bar 8, so there is no practical problem. Of course, a retaining pin is inserted in the diameter direction or a retaining screw is attached to a portion projecting outward from the main body 1 of the shaft portion 11 of the rotating shaft 3 of the embodiment shown in FIGS. It is also possible to take measures such as caulking a part of the peripheral surface to prevent it from coming off.
[0019]
In the embodiment shown in FIG. 6, a through hole 24 through which the separator 19 passes is provided in the large diameter shaft portion 23 that protrudes outward from the main body 1 of the rotary shaft 3, and this through hole 24 is used as the separator welding seat 20. Yes. In the separator welding seat 20 including the through hole 24, the separator 19 inserted into the through hole 24 and the rotary shaft 3 are welded at both ends or one end opening peripheral portion of the through hole 24.
[0020]
In the embodiment shown in FIG. 6, a heat insulating sheet 25 is interposed between the shaft portion 11 of the rotating shaft 3 and the through hole 13 of the main body 1 with both ends extending to the outside of the through hole 13. The transmission of welding heat from the rotating shaft 3 side to the main body 1 side can be further suppressed. In addition to using such a heat insulating sheet 25, heat from the rotating shaft 3 side to the main body 1 side is performed by, for example, subjecting either the outer peripheral surface of the shaft portion 11 or the inner peripheral surface of the through hole 13 to unevenness. Conductivity can also be reduced.
[0021]
1 to 3, the embodiment shown in FIG. 4, the embodiment shown in FIG. 5, and the embodiment shown in FIG. 6, the configuration of the rotating shaft 3, the configuration of the separator welding seat 20, or Another embodiment may be configured by combining thermal insulation configurations with each other. The rotary shaft 3 can be attached to the oblique side 7b far from the main body side 6 out of the two oblique sides 7a, 7b of the V-shaped reinforcing bar receiving portion 7 of the main body 1, or the side 6 of the main body 1. Can also be attached to.
[0022]
【The invention's effect】
The connecting metal fitting of the reinforcing bar and separator according to the present invention can be implemented and used as described above. According to the connecting metal fitting of the present invention, the main body includes the V-shaped reinforcing bar receiving portion and the bolt. By fixing one end of the separator with the required length to the separator welding seat of the rotating shaft supported by the main body, the separator is directly attached to the reinforcing bar. A separator can be connected to the reinforcing bar without welding. Accordingly, it is possible to prevent the strength of the reinforcing bar from being lowered by welding the separator to the reinforcing bar. In addition, since the separator is not welded directly to the surface of the main body but is welded to the rotating shaft that is rotatably supported with respect to the main body, the adverse effect on the main body strength due to welding heat is reduced. Furthermore, the position and orientation of the separator to be welded can be freely changed by combining adjustment of the main body fixing position in the length direction of the reinforcing bar, adjustment of the main body fixing direction around the reinforcing bar axis, rotation of the rotating shaft with respect to the main body, etc. I can do it. Therefore, it is possible to perform the attaching operation of the separator to the reinforcing bar including the change of the position and orientation of the separator after the attachment very easily, efficiently, and very accurately. Further, according to the configuration of the present invention, the rotating shaft does not fall off from the main body, the handling becomes easy, and a wide surface can be secured as a separator welding seat, so that the separator can be easily welded.
[0023]
In addition, according to the structure of Claim 2, the transmission of the welding heat from the outer end large diameter collar part of the rotating shaft which becomes the highest temperature at the time of separator welding to the main body transmits the large diameter collar part and the surface of the main body. It can be suppressed by the heat radiation gap between them, and the strength reduction due to the annealing effect due to the heating of the main body can be suppressed.
[0024]
Moreover, according to the structure of Claim 3, since the welded separator leaves | separates from the volt | bolt which fixes a main body to a reinforcing bar, the operation of the said volt | bolt can be performed easily. In this case, according to the configuration of the fourth aspect, a flat surface that can be used for direct welding of the separator remains on the side portion of the main body to which the rotating shaft is not attached. Although there is a possibility that the separator is welded to the side portion of the main body without welding the separator to the separator welding seat, according to the configuration of claim 4, the main body side portion has a short cylindrical wall around it. Since the opening provided with the portion is provided, it is possible to prevent the separator from being directly welded to the surface of the main body side portion by the short cylindrical wall portion. Accordingly, it is possible to prevent inconvenience due to the direct welding of the separator to the surface of the main body, that is, a significant decrease in the strength of the main body due to the main body receiving welding heat directly.
[0026]
Furthermore, according to the structure of Claim 5 , since the rotating shaft with which the separator was welded was finally fixed with respect to a main body, and eventually a reinforcing bar, the direction of a separator can be kept constant. In addition, it is possible to easily combine the concrete formwork and the like with the separator.
[0027]
Further, when configuring the separator welding locus of the rotary shaft from the flat surface as described in claim 6, the structure of the rotary shaft is simple, but can be inexpensively implemented, according to claim 7 Thus, when it comprises with the concave groove which a separator fits, since the separator to weld can be easily positioned in a predetermined position, the welding operation of a separator can be performed easily. Furthermore, when the separator welding seat is constituted by the through-hole through which the separator passes as described in claim 8 , even if the welding strength of the separator is somewhat insufficient, the risk of the separator falling off unexpectedly is reduced. Also, the welding length to the separator can be short.
[Brief description of the drawings]
FIG. 1A is a longitudinal side view showing a connecting metal fitting of the first embodiment, and FIG. 1B is a side view showing a rotating shaft to be used.
FIG. 2 is a plan view of the connection fitting.
FIG. 3 is a rear view of the connection fitting.
FIG. 4 is a longitudinal side view showing a coupling metal fitting of a second embodiment.
FIG. 5 is a longitudinal sectional side view showing a coupling fitting of a third embodiment.
FIG. 6 is a longitudinal sectional side view showing a main part of a connection fitting of a fourth embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Bolt 3 Rotating shaft 4 Through screw hole 5 Main body upper part 6 Main body side part 7 V-shaped reinforcing bar receiving part 7a, 7b The hypotenuse part 8 V-shaped reinforcing bar receiving part Reinforcing bar 9 Flat protruding rib 9a Inner groove part 11 Shaft part (Rotation) axis)
12 Large diameter collar (rotating shaft)
13 Through hole 14 Retaining collar (rotating shaft)
15 Radiation gap 16 Step (Rotating shaft)
17 Opening 18 Short cylindrical wall 19 Separator 20 Separator welding seat (rotating shaft)
21 Large diameter flange 22 Groove (Separator welding seat)
23 Large diameter shaft (rotating shaft)
24 Through hole (Separator welding seat)
25 Thermal insulation sheet

Claims

The main body comprises a main body, a bolt, and a rotating shaft. The main body is connected to an upper portion having a through screw hole, a side portion connected substantially perpendicularly from one end of the upper portion, and a free end of the side portion to a side on which the upper portion is located. And a V-shaped reinforcing bar receiving part that is recessed on the side facing the upper part, and the bolt is fitted into the reinforcing bar receiving part with the tip pressing part in a state of screwing through the through screw hole in the upper part of the main body. The rebar is pressed and fixed, and the rotating shaft is supported by the main body so that its axis is perpendicular to the surface of the main body and is capable of rotating around the axis, and protrudes outside the main body. A metal fitting for connecting a reinforcing bar with a separator seat on the end side and the separator , wherein the main body includes a flat protruding rib that continues from the upper part to the V-shaped reinforcing bar receiving part and protrudes outward. The rotating shaft is provided on the flat protruding rib. A shaft portion that penetrates the formed through-hole and is provided with the separator welding seat at the outer end, and is provided so as to be loosely fitted into the inner groove portion of the flat protruding rib on the inner end side of the shaft portion. A connecting bracket of a reinforcing bar and a separator, having a collar . .

The rotating shaft has a large-diameter flange that forms the separator welding seat on the outside of the main body, and a step portion for forming a heat radiation gap between the large-diameter flange and the surface of the main body. The connecting metal fitting of the reinforcing bar according to claim 1 and a separator.

The rebar-separator metal fitting according to claim 1 or 2, wherein the rotation shaft is attached to a hypotenuse on the main body side portion of both hypotenuses of the V-shaped rebar receiving portion of the main body.

The rebar-separator fitting according to claim 3, wherein an opening having a short cylindrical wall portion protruding outward is provided on a side portion of the main body.

The rebar-separator fitting according to any one of claims 1 to 4, wherein a flange portion at an inner end of the shaft portion of the rotating shaft is in contact with a rebar that is fitted into a V-shaped rebar receiving portion .

The rebar-separator connection fitting according to any one of claims 1 to 5, wherein the separator welding seat of the rotating shaft comprises a flat surface .

The rebar-separator connection fitting according to any one of claims 1 to 5, wherein the separator welding seat of the rotating shaft includes a concave groove into which the separator is fitted .

The rebar-separator fitting according to any one of claims 1 to 5, wherein the separator welding seat of the rotating shaft includes a through hole through which the separator passes .